* [PATCH v2 01/03] scsi: Add missing SPC-4 CDB and MAINTENANCE_[IN,OUT] service action definitions
2010-12-17 21:11 [PATCH v2 00/03] target: Initial merge of v4.0.0-rc6 for .38 Nicholas A. Bellinger
@ 2010-12-17 21:11 ` Nicholas A. Bellinger
2010-12-17 21:11 ` [PATCH v2 02a/03] target: Add ConfigFS extended macro set Nicholas A. Bellinger
` (19 subsequent siblings)
20 siblings, 0 replies; 22+ messages in thread
From: Nicholas A. Bellinger @ 2010-12-17 21:11 UTC (permalink / raw)
To: linux-scsi, James Bottomley; +Cc: Nicholas Bellinger
From: Nicholas Bellinger <nab@linux-iscsi.org>
This patch adds a handful of missing CDBs defs that are used by TCM
persistent reservation logic in the SPC-4 defined CDB exclusion table for
registrations and reservations.
This includes a number of missing MI_* and MO_* prefixed service actions defs
for MAINTENANCE_IN and MAINTENANCE_OUT that are mentioned wrt to persistent
registration and reservation status for the SCSI Initiator Port.
Signed-off-by: Nicholas A. Bellinger <nab@linux-iscsi.org>
---
include/scsi/scsi.h | 28 ++++++++++++++++++++++++++++
1 files changed, 28 insertions(+), 0 deletions(-)
diff --git a/include/scsi/scsi.h b/include/scsi/scsi.h
index 216af85..1651fef 100644
--- a/include/scsi/scsi.h
+++ b/include/scsi/scsi.h
@@ -115,33 +115,61 @@ struct scsi_cmnd;
#define PERSISTENT_RESERVE_OUT 0x5f
#define VARIABLE_LENGTH_CMD 0x7f
#define REPORT_LUNS 0xa0
+#define SECURITY_PROTOCOL_IN 0xa2
#define MAINTENANCE_IN 0xa3
#define MAINTENANCE_OUT 0xa4
#define MOVE_MEDIUM 0xa5
#define EXCHANGE_MEDIUM 0xa6
#define READ_12 0xa8
#define WRITE_12 0xaa
+#define READ_MEDIA_SERIAL_NUMBER 0xab
#define WRITE_VERIFY_12 0xae
#define VERIFY_12 0xaf
#define SEARCH_HIGH_12 0xb0
#define SEARCH_EQUAL_12 0xb1
#define SEARCH_LOW_12 0xb2
+#define SECURITY_PROTOCOL_OUT 0xb5
#define READ_ELEMENT_STATUS 0xb8
#define SEND_VOLUME_TAG 0xb6
#define WRITE_LONG_2 0xea
+#define EXTENDED_COPY 0x83
+#define RECEIVE_COPY_RESULTS 0x84
+#define ACCESS_CONTROL_IN 0x86
+#define ACCESS_CONTROL_OUT 0x87
#define READ_16 0x88
#define WRITE_16 0x8a
+#define READ_ATTRIBUTE 0x8c
+#define WRITE_ATTRIBUTE 0x8d
#define VERIFY_16 0x8f
#define WRITE_SAME_16 0x93
#define SERVICE_ACTION_IN 0x9e
/* values for service action in */
#define SAI_READ_CAPACITY_16 0x10
#define SAI_GET_LBA_STATUS 0x12
+/* values for VARIABLE_LENGTH_CMD service action codes
+ * see spc4r17 Section D.3.5, table D.7 and D.8 */
+#define VLC_SA_RECEIVE_CREDENTIAL 0x1800
/* values for maintenance in */
+#define MI_REPORT_IDENTIFYING_INFORMATION 0x05
#define MI_REPORT_TARGET_PGS 0x0a
+#define MI_REPORT_ALIASES 0x0b
+#define MI_REPORT_SUPPORTED_OPERATION_CODES 0x0c
+#define MI_REPORT_SUPPORTED_TASK_MANAGEMENT_FUNCTIONS 0x0d
+#define MI_REPORT_PRIORITY 0x0e
+#define MI_REPORT_TIMESTAMP 0x0f
+#define MI_MANAGEMENT_PROTOCOL_IN 0x10
/* values for maintenance out */
+#define MO_SET_IDENTIFYING_INFORMATION 0x06
#define MO_SET_TARGET_PGS 0x0a
+#define MO_CHANGE_ALIASES 0x0b
+#define MO_SET_PRIORITY 0x0e
+#define MO_SET_TIMESTAMP 0x0f
+#define MO_MANAGEMENT_PROTOCOL_OUT 0x10
/* values for variable length command */
+#define XDREAD_32 0x03
+#define XDWRITE_32 0x04
+#define XPWRITE_32 0x06
+#define XDWRITEREAD_32 0x07
#define READ_32 0x09
#define VERIFY_32 0x0a
#define WRITE_32 0x0b
--
1.7.3.4
^ permalink raw reply related [flat|nested] 22+ messages in thread* [PATCH v2 02a/03] target: Add ConfigFS extended macro set
2010-12-17 21:11 [PATCH v2 00/03] target: Initial merge of v4.0.0-rc6 for .38 Nicholas A. Bellinger
2010-12-17 21:11 ` [PATCH v2 01/03] scsi: Add missing SPC-4 CDB and MAINTENANCE_[IN,OUT] service action definitions Nicholas A. Bellinger
@ 2010-12-17 21:11 ` Nicholas A. Bellinger
2010-12-17 21:11 ` [PATCH v2 02b/03] target: Add v4 base data structures and struct target_core_fabric_ops Nicholas A. Bellinger
` (18 subsequent siblings)
20 siblings, 0 replies; 22+ messages in thread
From: Nicholas A. Bellinger @ 2010-12-17 21:11 UTC (permalink / raw)
To: linux-scsi, James Bottomley; +Cc: Nicholas Bellinger
From: Nicholas Bellinger <nab@linux-iscsi.org>
This patch adds the ConfigFS extended macro set in CONFIGFS_EATTR_*() that are used
by TCM/ConfigFS >= v3.x subsystem backstores and v4 generic fabric configfs infrastructure
and CPP macro set.
Compared to the original configfs macro set in include/linux/configfs.h, the extended macro
set allows for more flexability to handle multiple struct config_groups hanging off a single
parent data structure for more complex consumer logic and with less LOC!
Signed-off-by: Nicholas A. Bellinger <nab@linux-iscsi.org>
---
include/target/configfs_macros.h | 147 ++++++++++++++++++++++++++++++++++++++
1 files changed, 147 insertions(+), 0 deletions(-)
create mode 100644 include/target/configfs_macros.h
diff --git a/include/target/configfs_macros.h b/include/target/configfs_macros.h
new file mode 100644
index 0000000..7fe7460
--- /dev/null
+++ b/include/target/configfs_macros.h
@@ -0,0 +1,147 @@
+/* -*- mode: c; c-basic-offset: 8; -*-
+ * vim: noexpandtab sw=8 ts=8 sts=0:
+ *
+ * configfs_macros.h - extends macros for configfs
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public
+ * License along with this program; if not, write to the
+ * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+ * Boston, MA 021110-1307, USA.
+ *
+ * Based on sysfs:
+ * sysfs is Copyright (C) 2001, 2002, 2003 Patrick Mochel
+ *
+ * Based on kobject.h:
+ * Copyright (c) 2002-2003 Patrick Mochel
+ * Copyright (c) 2002-2003 Open Source Development Labs
+ *
+ * configfs Copyright (C) 2005 Oracle. All rights reserved.
+ *
+ * Added CONFIGFS_EATTR() macros from original configfs.h macros
+ * Copright (C) 2008-2009 Nicholas A. Bellinger <nab@linux-iscsi.org>
+ *
+ * Please read Documentation/filesystems/configfs.txt before using the
+ * configfs interface, ESPECIALLY the parts about reference counts and
+ * item destructors.
+ */
+
+#ifndef _CONFIGFS_MACROS_H_
+#define _CONFIGFS_MACROS_H_
+
+#include <linux/configfs.h>
+
+/*
+ * Users often need to create attribute structures for their configurable
+ * attributes, containing a configfs_attribute member and function pointers
+ * for the show() and store() operations on that attribute. If they don't
+ * need anything else on the extended attribute structure, they can use
+ * this macro to define it. The argument _name isends up as
+ * 'struct _name_attribute, as well as names of to CONFIGFS_ATTR_OPS() below.
+ * The argument _item is the name of the structure containing the
+ * struct config_item or struct config_group structure members
+ */
+#define CONFIGFS_EATTR_STRUCT(_name, _item) \
+struct _name##_attribute { \
+ struct configfs_attribute attr; \
+ ssize_t (*show)(struct _item *, char *); \
+ ssize_t (*store)(struct _item *, const char *, size_t); \
+}
+
+/*
+ * With the extended attribute structure, users can use this macro
+ * (similar to sysfs' __ATTR) to make defining attributes easier.
+ * An example:
+ * #define MYITEM_EATTR(_name, _mode, _show, _store) \
+ * struct myitem_attribute childless_attr_##_name = \
+ * __CONFIGFS_EATTR(_name, _mode, _show, _store)
+ */
+#define __CONFIGFS_EATTR(_name, _mode, _show, _store) \
+{ \
+ .attr = { \
+ .ca_name = __stringify(_name), \
+ .ca_mode = _mode, \
+ .ca_owner = THIS_MODULE, \
+ }, \
+ .show = _show, \
+ .store = _store, \
+}
+/* Here is a readonly version, only requiring a show() operation */
+#define __CONFIGFS_EATTR_RO(_name, _show) \
+{ \
+ .attr = { \
+ .ca_name = __stringify(_name), \
+ .ca_mode = 0444, \
+ .ca_owner = THIS_MODULE, \
+ }, \
+ .show = _show, \
+}
+
+/*
+ * With these extended attributes, the simple show_attribute() and
+ * store_attribute() operations need to call the show() and store() of the
+ * attributes. This is a common pattern, so we provide a macro to define
+ * them. The argument _name is the name of the attribute defined by
+ * CONFIGFS_ATTR_STRUCT(). The argument _item is the name of the structure
+ * containing the struct config_item or struct config_group structure member.
+ * The argument _item_member is the actual name of the struct config_* struct
+ * in your _item structure. Meaning my_structure->some_config_group.
+ * ^^_item^^^^^ ^^_item_member^^^
+ * This macro expects the attributes to be named "struct <name>_attribute".
+ */
+#define CONFIGFS_EATTR_OPS_TO_FUNC(_name, _item, _item_member) \
+static struct _item *to_##_name(struct config_item *ci) \
+{ \
+ return (ci) ? container_of(to_config_group(ci), struct _item, \
+ _item_member) : NULL; \
+}
+
+#define CONFIGFS_EATTR_OPS_SHOW(_name, _item) \
+static ssize_t _name##_attr_show(struct config_item *item, \
+ struct configfs_attribute *attr, \
+ char *page) \
+{ \
+ struct _item *_item = to_##_name(item); \
+ struct _name##_attribute * _name##_attr = \
+ container_of(attr, struct _name##_attribute, attr); \
+ ssize_t ret = 0; \
+ \
+ if (_name##_attr->show) \
+ ret = _name##_attr->show(_item, page); \
+ return ret; \
+}
+
+#define CONFIGFS_EATTR_OPS_STORE(_name, _item) \
+static ssize_t _name##_attr_store(struct config_item *item, \
+ struct configfs_attribute *attr, \
+ const char *page, size_t count) \
+{ \
+ struct _item *_item = to_##_name(item); \
+ struct _name##_attribute * _name##_attr = \
+ container_of(attr, struct _name##_attribute, attr); \
+ ssize_t ret = -EINVAL; \
+ \
+ if (_name##_attr->store) \
+ ret = _name##_attr->store(_item, page, count); \
+ return ret; \
+}
+
+#define CONFIGFS_EATTR_OPS(_name, _item, _item_member) \
+ CONFIGFS_EATTR_OPS_TO_FUNC(_name, _item, _item_member); \
+ CONFIGFS_EATTR_OPS_SHOW(_name, _item); \
+ CONFIGFS_EATTR_OPS_STORE(_name, _item);
+
+#define CONFIGFS_EATTR_OPS_RO(_name, _item, _item_member) \
+ CONFIGFS_EATTR_OPS_TO_FUNC(_name, _item, _item_member); \
+ CONFIGFS_EATTR_OPS_SHOW(_name, _item);
+
+#endif /* _CONFIGFS_MACROS_H_ */
--
1.7.3.4
^ permalink raw reply related [flat|nested] 22+ messages in thread* [PATCH v2 02b/03] target: Add v4 base data structures and struct target_core_fabric_ops
2010-12-17 21:11 [PATCH v2 00/03] target: Initial merge of v4.0.0-rc6 for .38 Nicholas A. Bellinger
2010-12-17 21:11 ` [PATCH v2 01/03] scsi: Add missing SPC-4 CDB and MAINTENANCE_[IN,OUT] service action definitions Nicholas A. Bellinger
2010-12-17 21:11 ` [PATCH v2 02a/03] target: Add ConfigFS extended macro set Nicholas A. Bellinger
@ 2010-12-17 21:11 ` Nicholas A. Bellinger
2010-12-17 21:11 ` [PATCH v2 02c/03] target: Add SPC-4 explict and implict Asymmetric Logical Unit Access (ALUA) Nicholas A. Bellinger
` (17 subsequent siblings)
20 siblings, 0 replies; 22+ messages in thread
From: Nicholas A. Bellinger @ 2010-12-17 21:11 UTC (permalink / raw)
To: linux-scsi, James Bottomley; +Cc: Nicholas Bellinger
From: Nicholas Bellinger <nab@linux-iscsi.org>
This patch adds TCM Core v4 base data structures definitions + macros
and fabric module function pointer API in struct target_core_fabric_ops.
Signed-off-by: Nicholas A. Bellinger <nab@linux-iscsi.org>
---
include/target/target_core_base.h | 936 +++++++++++++++++++++++++++++++
include/target/target_core_fabric_ops.h | 100 ++++
2 files changed, 1036 insertions(+), 0 deletions(-)
create mode 100644 include/target/target_core_base.h
create mode 100644 include/target/target_core_fabric_ops.h
diff --git a/include/target/target_core_base.h b/include/target/target_core_base.h
new file mode 100644
index 0000000..98c4c2d
--- /dev/null
+++ b/include/target/target_core_base.h
@@ -0,0 +1,936 @@
+#ifndef TARGET_CORE_BASE_H
+#define TARGET_CORE_BASE_H
+
+#include <linux/in.h>
+#include <linux/configfs.h>
+#include <linux/dma-mapping.h>
+#include <scsi/scsi_cmnd.h>
+#include <net/sock.h>
+#include <net/tcp.h>
+#include "target_core_mib.h"
+
+#define TARGET_CORE_MOD_VERSION "v4.0.0-rc6"
+#define SHUTDOWN_SIGS (sigmask(SIGKILL)|sigmask(SIGINT)|sigmask(SIGABRT))
+
+/* Used by transport_generic_allocate_iovecs() */
+#define TRANSPORT_IOV_DATA_BUFFER 5
+/* Maximum Number of LUNs per Target Portal Group */
+#define TRANSPORT_MAX_LUNS_PER_TPG 256
+/*
+ * By default we use 32-byte CDBs in TCM Core and subsystem plugin code.
+ *
+ * Note that both include/scsi/scsi_cmnd.h:MAX_COMMAND_SIZE and
+ * include/linux/blkdev.h:BLOCK_MAX_CDB as of v2.6.36-rc4 still use
+ * 16-byte CDBs by default and require an extra allocation for
+ * 32-byte CDBs to becasue of legacy issues.
+ *
+ * Within TCM Core there are no such legacy limitiations, so we go ahead
+ * use 32-byte CDBs by default and use include/scsi/scsi.h:scsi_command_size()
+ * within all TCM Core and subsystem plugin code.
+ */
+#define TCM_MAX_COMMAND_SIZE 32
+/*
+ * From include/scsi/scsi_cmnd.h:SCSI_SENSE_BUFFERSIZE, currently
+ * defined 96, but the real limit is 252 (or 260 including the header)
+ */
+#define TRANSPORT_SENSE_BUFFER SCSI_SENSE_BUFFERSIZE
+/* Used by transport_send_check_condition_and_sense() */
+#define SPC_SENSE_KEY_OFFSET 2
+#define SPC_ASC_KEY_OFFSET 12
+#define SPC_ASCQ_KEY_OFFSET 13
+#define TRANSPORT_IQN_LEN 224
+/* Used by target_core_store_alua_lu_gp() and target_core_alua_lu_gp_show_attr_members() */
+#define LU_GROUP_NAME_BUF 256
+/* Used by core_alua_store_tg_pt_gp_info() and target_core_alua_tg_pt_gp_show_attr_members() */
+#define TG_PT_GROUP_NAME_BUF 256
+/* Used to parse VPD into struct t10_vpd */
+#define VPD_TMP_BUF_SIZE 128
+/* Used by transport_generic_cmd_sequencer() */
+#define READ_BLOCK_LEN 6
+#define READ_CAP_LEN 8
+#define READ_POSITION_LEN 20
+#define INQUIRY_LEN 36
+/* Used by transport_get_inquiry_vpd_serial() */
+#define INQUIRY_VPD_SERIAL_LEN 254
+/* Used by transport_get_inquiry_vpd_device_ident() */
+#define INQUIRY_VPD_DEVICE_IDENTIFIER_LEN 254
+
+/* struct se_hba->hba_flags */
+enum hba_flags_table {
+ HBA_FLAGS_INTERNAL_USE = 0x01,
+ HBA_FLAGS_PSCSI_MODE = 0x02,
+};
+
+/* struct se_lun->lun_status */
+enum transport_lun_status_table {
+ TRANSPORT_LUN_STATUS_FREE = 0,
+ TRANSPORT_LUN_STATUS_ACTIVE = 1,
+};
+
+/* struct se_portal_group->se_tpg_type */
+enum transport_tpg_type_table {
+ TRANSPORT_TPG_TYPE_NORMAL = 0,
+ TRANSPORT_TPG_TYPE_DISCOVERY = 1,
+};
+
+/* Used for generate timer flags */
+enum timer_flags_table {
+ TF_RUNNING = 0x01,
+ TF_STOP = 0x02,
+};
+
+/* Special transport agnostic struct se_cmd->t_states */
+enum transport_state_table {
+ TRANSPORT_NO_STATE = 0,
+ TRANSPORT_NEW_CMD = 1,
+ TRANSPORT_DEFERRED_CMD = 2,
+ TRANSPORT_WRITE_PENDING = 3,
+ TRANSPORT_PROCESS_WRITE = 4,
+ TRANSPORT_PROCESSING = 5,
+ TRANSPORT_COMPLETE_OK = 6,
+ TRANSPORT_COMPLETE_FAILURE = 7,
+ TRANSPORT_COMPLETE_TIMEOUT = 8,
+ TRANSPORT_PROCESS_TMR = 9,
+ TRANSPORT_TMR_COMPLETE = 10,
+ TRANSPORT_ISTATE_PROCESSING = 11,
+ TRANSPORT_ISTATE_PROCESSED = 12,
+ TRANSPORT_KILL = 13,
+ TRANSPORT_REMOVE = 14,
+ TRANSPORT_FREE = 15,
+ TRANSPORT_NEW_CMD_MAP = 16,
+};
+
+/* Used for struct se_cmd->se_cmd_flags */
+enum se_cmd_flags_table {
+ SCF_SUPPORTED_SAM_OPCODE = 0x00000001,
+ SCF_TRANSPORT_TASK_SENSE = 0x00000002,
+ SCF_EMULATED_TASK_SENSE = 0x00000004,
+ SCF_SCSI_DATA_SG_IO_CDB = 0x00000008,
+ SCF_SCSI_CONTROL_SG_IO_CDB = 0x00000010,
+ SCF_SCSI_CONTROL_NONSG_IO_CDB = 0x00000020,
+ SCF_SCSI_NON_DATA_CDB = 0x00000040,
+ SCF_SCSI_CDB_EXCEPTION = 0x00000080,
+ SCF_SCSI_RESERVATION_CONFLICT = 0x00000100,
+ SCF_CMD_PASSTHROUGH_NOALLOC = 0x00000200,
+ SCF_SE_CMD_FAILED = 0x00000400,
+ SCF_SE_LUN_CMD = 0x00000800,
+ SCF_SE_ALLOW_EOO = 0x00001000,
+ SCF_SE_DISABLE_ONLINE_CHECK = 0x00002000,
+ SCF_SENT_CHECK_CONDITION = 0x00004000,
+ SCF_OVERFLOW_BIT = 0x00008000,
+ SCF_UNDERFLOW_BIT = 0x00010000,
+ SCF_SENT_DELAYED_TAS = 0x00020000,
+ SCF_ALUA_NON_OPTIMIZED = 0x00040000,
+ SCF_DELAYED_CMD_FROM_SAM_ATTR = 0x00080000,
+ SCF_PASSTHROUGH_SG_TO_MEM = 0x00100000,
+ SCF_PASSTHROUGH_CONTIG_TO_SG = 0x00200000,
+ SCF_PASSTHROUGH_SG_TO_MEM_NOALLOC = 0x00400000,
+ SCF_EMULATE_SYNC_CACHE = 0x00800000,
+ SCF_EMULATE_CDB_ASYNC = 0x01000000,
+ SCF_EMULATE_SYNC_UNMAP = 0x02000000
+};
+
+/* struct se_dev_entry->lun_flags and struct se_lun->lun_access */
+enum transport_lunflags_table {
+ TRANSPORT_LUNFLAGS_NO_ACCESS = 0x00,
+ TRANSPORT_LUNFLAGS_INITIATOR_ACCESS = 0x01,
+ TRANSPORT_LUNFLAGS_READ_ONLY = 0x02,
+ TRANSPORT_LUNFLAGS_READ_WRITE = 0x04,
+};
+
+/* struct se_device->dev_status */
+enum transport_device_status_table {
+ TRANSPORT_DEVICE_ACTIVATED = 0x01,
+ TRANSPORT_DEVICE_DEACTIVATED = 0x02,
+ TRANSPORT_DEVICE_QUEUE_FULL = 0x04,
+ TRANSPORT_DEVICE_SHUTDOWN = 0x08,
+ TRANSPORT_DEVICE_OFFLINE_ACTIVATED = 0x10,
+ TRANSPORT_DEVICE_OFFLINE_DEACTIVATED = 0x20,
+};
+
+/*
+ * Used by transport_send_check_condition_and_sense() and se_cmd->scsi_sense_reason
+ * to signal which ASC/ASCQ sense payload should be built.
+ */
+enum tcm_sense_reason_table {
+ TCM_NON_EXISTENT_LUN = 0x01,
+ TCM_UNSUPPORTED_SCSI_OPCODE = 0x02,
+ TCM_INCORRECT_AMOUNT_OF_DATA = 0x03,
+ TCM_UNEXPECTED_UNSOLICITED_DATA = 0x04,
+ TCM_SERVICE_CRC_ERROR = 0x05,
+ TCM_SNACK_REJECTED = 0x06,
+ TCM_SECTOR_COUNT_TOO_MANY = 0x07,
+ TCM_INVALID_CDB_FIELD = 0x08,
+ TCM_INVALID_PARAMETER_LIST = 0x09,
+ TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE = 0x0a,
+ TCM_UNKNOWN_MODE_PAGE = 0x0b,
+ TCM_WRITE_PROTECTED = 0x0c,
+ TCM_CHECK_CONDITION_ABORT_CMD = 0x0d,
+ TCM_CHECK_CONDITION_UNIT_ATTENTION = 0x0e,
+ TCM_CHECK_CONDITION_NOT_READY = 0x0f,
+};
+
+struct se_obj {
+ atomic_t obj_access_count;
+} ____cacheline_aligned;
+
+/*
+ * Used by TCM Core internally to signal if ALUA emulation is enabled or
+ * disabled, or running in with TCM/pSCSI passthrough mode
+ */
+typedef enum {
+ SPC_ALUA_PASSTHROUGH,
+ SPC2_ALUA_DISABLED,
+ SPC3_ALUA_EMULATED
+} t10_alua_index_t;
+
+/*
+ * Used by TCM Core internally to signal if SAM Task Attribute emulation
+ * is enabled or disabled, or running in with TCM/pSCSI passthrough mode
+ */
+typedef enum {
+ SAM_TASK_ATTR_PASSTHROUGH,
+ SAM_TASK_ATTR_UNTAGGED,
+ SAM_TASK_ATTR_EMULATED
+} t10_task_attr_index_t;
+
+struct se_cmd;
+
+struct t10_alua {
+ t10_alua_index_t alua_type;
+ /* ALUA Target Port Group ID */
+ u16 alua_tg_pt_gps_counter;
+ u32 alua_tg_pt_gps_count;
+ spinlock_t tg_pt_gps_lock;
+ struct se_subsystem_dev *t10_sub_dev;
+ /* Used for default ALUA Target Port Group */
+ struct t10_alua_tg_pt_gp *default_tg_pt_gp;
+ /* Used for default ALUA Target Port Group ConfigFS group */
+ struct config_group alua_tg_pt_gps_group;
+ int (*alua_state_check)(struct se_cmd *, unsigned char *, u8 *);
+ struct list_head tg_pt_gps_list;
+} ____cacheline_aligned;
+
+struct t10_alua_lu_gp {
+ u16 lu_gp_id;
+ int lu_gp_valid_id;
+ u32 lu_gp_members;
+ atomic_t lu_gp_shutdown;
+ atomic_t lu_gp_ref_cnt;
+ spinlock_t lu_gp_lock;
+ struct config_group lu_gp_group;
+ struct list_head lu_gp_list;
+ struct list_head lu_gp_mem_list;
+} ____cacheline_aligned;
+
+struct t10_alua_lu_gp_member {
+ int lu_gp_assoc:1;
+ atomic_t lu_gp_mem_ref_cnt;
+ spinlock_t lu_gp_mem_lock;
+ struct t10_alua_lu_gp *lu_gp;
+ struct se_device *lu_gp_mem_dev;
+ struct list_head lu_gp_mem_list;
+} ____cacheline_aligned;
+
+struct t10_alua_tg_pt_gp {
+ u16 tg_pt_gp_id;
+ int tg_pt_gp_valid_id;
+ int tg_pt_gp_alua_access_status;
+ int tg_pt_gp_alua_access_type;
+ int tg_pt_gp_nonop_delay_msecs;
+ int tg_pt_gp_trans_delay_msecs;
+ int tg_pt_gp_pref;
+ int tg_pt_gp_write_metadata;
+ /* Used by struct t10_alua_tg_pt_gp->tg_pt_gp_md_buf_len */
+#define ALUA_MD_BUF_LEN 1024
+ u32 tg_pt_gp_md_buf_len;
+ u32 tg_pt_gp_members;
+ atomic_t tg_pt_gp_alua_access_state;
+ atomic_t tg_pt_gp_ref_cnt;
+ spinlock_t tg_pt_gp_lock;
+ struct mutex tg_pt_gp_md_mutex;
+ struct se_subsystem_dev *tg_pt_gp_su_dev;
+ struct config_group tg_pt_gp_group;
+ struct list_head tg_pt_gp_list;
+ struct list_head tg_pt_gp_mem_list;
+} ____cacheline_aligned;
+
+struct t10_alua_tg_pt_gp_member {
+ int tg_pt_gp_assoc:1;
+ atomic_t tg_pt_gp_mem_ref_cnt;
+ spinlock_t tg_pt_gp_mem_lock;
+ struct t10_alua_tg_pt_gp *tg_pt_gp;
+ struct se_port *tg_pt;
+ struct list_head tg_pt_gp_mem_list;
+} ____cacheline_aligned;
+
+struct t10_vpd {
+ unsigned char device_identifier[INQUIRY_VPD_DEVICE_IDENTIFIER_LEN];
+ int protocol_identifier_set;
+ u32 protocol_identifier;
+ u32 device_identifier_code_set;
+ u32 association;
+ u32 device_identifier_type;
+ struct list_head vpd_list;
+} ____cacheline_aligned;
+
+struct t10_wwn {
+ unsigned char vendor[8];
+ unsigned char model[16];
+ unsigned char revision[4];
+ unsigned char unit_serial[INQUIRY_VPD_SERIAL_LEN];
+ spinlock_t t10_vpd_lock;
+ struct se_subsystem_dev *t10_sub_dev;
+ struct config_group t10_wwn_group;
+ struct list_head t10_vpd_list;
+} ____cacheline_aligned;
+
+
+/*
+ * Used by TCM Core internally to signal if >= SPC-3 peristent reservations
+ * emulation is enabled or disabled, or running in with TCM/pSCSI passthrough
+ * mode
+ */
+typedef enum {
+ SPC_PASSTHROUGH,
+ SPC2_RESERVATIONS,
+ SPC3_PERSISTENT_RESERVATIONS
+} t10_reservations_index_t;
+
+struct t10_pr_registration {
+ /* Used for fabrics that contain WWN+ISID */
+#define PR_REG_ISID_LEN 16
+ /* PR_REG_ISID_LEN + ',i,0x' */
+#define PR_REG_ISID_ID_LEN (PR_REG_ISID_LEN + 5)
+ char pr_reg_isid[PR_REG_ISID_LEN];
+ /* Used during APTPL metadata reading */
+#define PR_APTPL_MAX_IPORT_LEN 256
+ unsigned char pr_iport[PR_APTPL_MAX_IPORT_LEN];
+ /* Used during APTPL metadata reading */
+#define PR_APTPL_MAX_TPORT_LEN 256
+ unsigned char pr_tport[PR_APTPL_MAX_TPORT_LEN];
+ /* For writing out live meta data */
+ unsigned char *pr_aptpl_buf;
+ u16 pr_aptpl_rpti;
+ u16 pr_reg_tpgt;
+ /* Reservation effects all target ports */
+ int pr_reg_all_tg_pt;
+ /* Activate Persistence across Target Power Loss */
+ int pr_reg_aptpl;
+ int pr_res_holder;
+ int pr_res_type;
+ int pr_res_scope;
+ /* Used for fabric initiator WWPNs using a ISID */
+ int isid_present_at_reg:1;
+ u32 pr_res_mapped_lun;
+ u32 pr_aptpl_target_lun;
+ u32 pr_res_generation;
+ u64 pr_reg_bin_isid;
+ u64 pr_res_key;
+ atomic_t pr_res_holders;
+ struct se_node_acl *pr_reg_nacl;
+ struct se_dev_entry *pr_reg_deve;
+ struct se_lun *pr_reg_tg_pt_lun;
+ struct list_head pr_reg_list;
+ struct list_head pr_reg_abort_list;
+ struct list_head pr_reg_aptpl_list;
+ struct list_head pr_reg_atp_list;
+ struct list_head pr_reg_atp_mem_list;
+} ____cacheline_aligned;
+
+/*
+ * This set of function pointer ops is set based upon SPC3_PERSISTENT_RESERVATIONS,
+ * SPC2_RESERVATIONS or SPC_PASSTHROUGH in drivers/target/target_core_pr.c:
+ * core_setup_reservations()
+ */
+struct t10_reservation_ops {
+ int (*t10_reservation_check)(struct se_cmd *, u32 *);
+ int (*t10_seq_non_holder)(struct se_cmd *, unsigned char *, u32);
+ int (*t10_pr_register)(struct se_cmd *);
+ int (*t10_pr_clear)(struct se_cmd *);
+};
+
+struct t10_reservation_template {
+ /* Reservation effects all target ports */
+ int pr_all_tg_pt;
+ /* Activate Persistence across Target Power Loss enabled
+ * for SCSI device */
+ int pr_aptpl_active;
+ /* Used by struct t10_reservation_template->pr_aptpl_buf_len */
+#define PR_APTPL_BUF_LEN 8192
+ u32 pr_aptpl_buf_len;
+ u32 pr_generation;
+ t10_reservations_index_t res_type;
+ spinlock_t registration_lock;
+ spinlock_t aptpl_reg_lock;
+ /*
+ * This will always be set by one individual I_T Nexus.
+ * However with all_tg_pt=1, other I_T Nexus from the
+ * same initiator can access PR reg/res info on a different
+ * target port.
+ *
+ * There is also the 'All Registrants' case, where there is
+ * a single *pr_res_holder of the reservation, but all
+ * registrations are considered reservation holders.
+ */
+ struct se_node_acl *pr_res_holder;
+ struct list_head registration_list;
+ struct list_head aptpl_reg_list;
+ struct t10_reservation_ops pr_ops;
+} ____cacheline_aligned;
+
+struct se_queue_req {
+ int state;
+ void *cmd;
+ struct list_head qr_list;
+} ____cacheline_aligned;
+
+struct se_queue_obj {
+ atomic_t queue_cnt;
+ spinlock_t cmd_queue_lock;
+ struct list_head qobj_list;
+ wait_queue_head_t thread_wq;
+} ____cacheline_aligned;
+
+/*
+ * Used one per struct se_cmd to hold all extra struct se_task
+ * metadata. This structure is setup and allocated in
+ * drivers/target/target_core_transport.c:__transport_alloc_se_cmd()
+ */
+struct se_transport_task {
+ unsigned char *t_task_cdb;
+ unsigned char __t_task_cdb[TCM_MAX_COMMAND_SIZE];
+ unsigned long long t_task_lba;
+ int t_tasks_failed;
+ int t_tasks_fua;
+ int t_tasks_bidi:1;
+ u32 t_task_cdbs;
+ u32 t_tasks_check;
+ u32 t_tasks_no;
+ u32 t_tasks_sectors;
+ u32 t_tasks_se_num;
+ u32 t_tasks_se_bidi_num;
+ u32 t_tasks_sg_chained_no;
+ atomic_t t_fe_count;
+ atomic_t t_se_count;
+ atomic_t t_task_cdbs_left;
+ atomic_t t_task_cdbs_ex_left;
+ atomic_t t_task_cdbs_timeout_left;
+ atomic_t t_task_cdbs_sent;
+ atomic_t t_transport_aborted;
+ atomic_t t_transport_active;
+ atomic_t t_transport_complete;
+ atomic_t t_transport_queue_active;
+ atomic_t t_transport_sent;
+ atomic_t t_transport_stop;
+ atomic_t t_transport_timeout;
+ atomic_t transport_dev_active;
+ atomic_t transport_lun_active;
+ atomic_t transport_lun_fe_stop;
+ atomic_t transport_lun_stop;
+ spinlock_t t_state_lock;
+ struct completion t_transport_stop_comp;
+ struct completion transport_lun_fe_stop_comp;
+ struct completion transport_lun_stop_comp;
+ struct scatterlist *t_tasks_sg_chained;
+ struct scatterlist t_tasks_sg_bounce;
+ void *t_task_buf;
+ /*
+ * Used for pre-registered fabric SGL passthrough WRITE and READ
+ * with the special SCF_PASSTHROUGH_CONTIG_TO_SG case for TCM_Loop
+ * and other HW target mode fabric modules.
+ */
+ struct scatterlist *t_task_pt_sgl;
+ struct list_head *t_mem_list;
+ /* Used for BIDI READ */
+ struct list_head *t_mem_bidi_list;
+ struct list_head t_task_list;
+} ____cacheline_aligned;
+
+struct se_task {
+ unsigned char task_sense;
+ struct scatterlist *task_sg;
+ struct scatterlist *task_sg_bidi;
+ u8 task_scsi_status;
+ u8 task_flags;
+ int task_error_status;
+ int task_state_flags;
+ int task_padded_sg:1;
+ unsigned long long task_lba;
+ u32 task_no;
+ u32 task_sectors;
+ u32 task_size;
+ u32 task_sg_num;
+ u32 task_sg_offset;
+ enum dma_data_direction task_data_direction;
+ struct se_cmd *task_se_cmd;
+ struct se_device *se_dev;
+ struct completion task_stop_comp;
+ atomic_t task_active;
+ atomic_t task_execute_queue;
+ atomic_t task_timeout;
+ atomic_t task_sent;
+ atomic_t task_stop;
+ atomic_t task_state_active;
+ struct timer_list task_timer;
+ struct se_device *se_obj_ptr;
+ struct list_head t_list;
+ struct list_head t_execute_list;
+ struct list_head t_state_list;
+} ____cacheline_aligned;
+
+#define TASK_CMD(task) ((struct se_cmd *)task->task_se_cmd)
+#define TASK_DEV(task) ((struct se_device *)task->se_dev)
+
+struct se_cmd {
+ /* SAM response code being sent to initiator */
+ u8 scsi_status;
+ u8 scsi_asc;
+ u8 scsi_ascq;
+ u8 scsi_sense_reason;
+ u16 scsi_sense_length;
+ /* Delay for ALUA Active/NonOptimized state access in milliseconds */
+ int alua_nonop_delay;
+ /* See include/linux/dma-mapping.h */
+ enum dma_data_direction data_direction;
+ /* For SAM Task Attribute */
+ int sam_task_attr;
+ /* Transport protocol dependent state, see transport_state_table */
+ enum transport_state_table t_state;
+ /* Transport protocol dependent state for out of order CmdSNs */
+ int deferred_t_state;
+ /* Transport specific error status */
+ int transport_error_status;
+ /* See se_cmd_flags_table */
+ u32 se_cmd_flags;
+ u32 se_ordered_id;
+ /* Total size in bytes associated with command */
+ u32 data_length;
+ /* SCSI Presented Data Transfer Length */
+ u32 cmd_spdtl;
+ u32 residual_count;
+ u32 orig_fe_lun;
+ /* Persistent Reservation key */
+ u64 pr_res_key;
+ atomic_t transport_sent;
+ /* Used for sense data */
+ void *sense_buffer;
+ struct list_head se_delayed_list;
+ struct list_head se_ordered_list;
+ struct list_head se_lun_list;
+ struct se_device *se_dev;
+ struct se_dev_entry *se_deve;
+ struct se_device *se_obj_ptr;
+ struct se_device *se_orig_obj_ptr;
+ struct se_lun *se_lun;
+ /* Only used for internal passthrough and legacy TCM fabric modules */
+ struct se_session *se_sess;
+ struct se_tmr_req *se_tmr_req;
+ /* t_task is setup to t_task_backstore in transport_init_se_cmd() */
+ struct se_transport_task *t_task;
+ struct se_transport_task t_task_backstore;
+ struct target_core_fabric_ops *se_tfo;
+ int (*transport_emulate_cdb)(struct se_cmd *);
+ void (*transport_split_cdb)(unsigned long long, u32 *, unsigned char *);
+ void (*transport_wait_for_tasks)(struct se_cmd *, int, int);
+ void (*transport_complete_callback)(struct se_cmd *);
+} ____cacheline_aligned;
+
+#define T_TASK(cmd) ((struct se_transport_task *)(cmd->t_task))
+#define CMD_TFO(cmd) ((struct target_core_fabric_ops *)cmd->se_tfo)
+
+struct se_tmr_req {
+ /* Task Management function to be preformed */
+ u8 function;
+ /* Task Management response to send */
+ u8 response;
+ int call_transport;
+ /* Reference to ITT that Task Mgmt should be preformed */
+ u32 ref_task_tag;
+ /* 64-bit encoded SAM LUN from $FABRIC_MOD TMR header */
+ u64 ref_task_lun;
+ void *fabric_tmr_ptr;
+ struct se_cmd *task_cmd;
+ struct se_cmd *ref_cmd;
+ struct se_device *tmr_dev;
+ struct se_lun *tmr_lun;
+ struct list_head tmr_list;
+} ____cacheline_aligned;
+
+struct se_ua {
+ u8 ua_asc;
+ u8 ua_ascq;
+ struct se_node_acl *ua_nacl;
+ struct list_head ua_dev_list;
+ struct list_head ua_nacl_list;
+} ____cacheline_aligned;
+
+struct se_node_acl {
+ char initiatorname[TRANSPORT_IQN_LEN];
+ /* Used to signal demo mode created ACL, disabled by default */
+ int dynamic_node_acl:1;
+ u32 queue_depth;
+ u32 acl_index;
+ u64 num_cmds;
+ u64 read_bytes;
+ u64 write_bytes;
+ spinlock_t stats_lock;
+ /* Used for PR SPEC_I_PT=1 and REGISTER_AND_MOVE */
+ atomic_t acl_pr_ref_count;
+ /* Used for MIB access */
+ atomic_t mib_ref_count;
+ struct se_dev_entry *device_list;
+ struct se_session *nacl_sess;
+ struct se_portal_group *se_tpg;
+ spinlock_t device_list_lock;
+ spinlock_t nacl_sess_lock;
+ struct config_group acl_group;
+ struct config_group acl_attrib_group;
+ struct config_group acl_auth_group;
+ struct config_group acl_param_group;
+ struct config_group *acl_default_groups[4];
+ struct list_head acl_list;
+ struct list_head acl_sess_list;
+} ____cacheline_aligned;
+
+struct se_session {
+ /* Used for MIB access */
+ atomic_t mib_ref_count;
+ u64 sess_bin_isid;
+ struct se_node_acl *se_node_acl;
+ struct se_portal_group *se_tpg;
+ void *fabric_sess_ptr;
+ struct list_head sess_list;
+ struct list_head sess_acl_list;
+} ____cacheline_aligned;
+
+#define SE_SESS(cmd) ((struct se_session *)(cmd)->se_sess)
+#define SE_NODE_ACL(sess) ((struct se_node_acl *)(sess)->se_node_acl)
+
+struct se_device;
+struct se_transform_info;
+struct scatterlist;
+
+struct se_lun_acl {
+ char initiatorname[TRANSPORT_IQN_LEN];
+ u32 mapped_lun;
+ struct se_node_acl *se_lun_nacl;
+ struct se_lun *se_lun;
+ struct list_head lacl_list;
+ struct config_group se_lun_group;
+} ____cacheline_aligned;
+
+struct se_dev_entry {
+ int def_pr_registered:1;
+ /* See transport_lunflags_table */
+ u32 lun_flags;
+ u32 deve_cmds;
+ u32 mapped_lun;
+ u32 average_bytes;
+ u32 last_byte_count;
+ u32 total_cmds;
+ u32 total_bytes;
+ u64 pr_res_key;
+ u64 creation_time;
+ u32 attach_count;
+ u64 read_bytes;
+ u64 write_bytes;
+ atomic_t ua_count;
+ /* Used for PR SPEC_I_PT=1 and REGISTER_AND_MOVE */
+ atomic_t pr_ref_count;
+ struct se_lun_acl *se_lun_acl;
+ spinlock_t ua_lock;
+ struct se_lun *se_lun;
+ struct list_head alua_port_list;
+ struct list_head ua_list;
+} ____cacheline_aligned;
+
+struct se_dev_limits {
+ /* Max supported HW queue depth */
+ u32 hw_queue_depth;
+ /* Max supported virtual queue depth */
+ u32 queue_depth;
+ /* From include/linux/blkdev.h for the other HW/SW limits. */
+ struct queue_limits limits;
+} ____cacheline_aligned;
+
+struct se_dev_attrib {
+ int emulate_dpo;
+ int emulate_fua_write;
+ int emulate_fua_read;
+ int emulate_write_cache;
+ int emulate_ua_intlck_ctrl;
+ int emulate_tas;
+ int emulate_tpu;
+ int emulate_tpws;
+ int emulate_reservations;
+ int emulate_alua;
+ int enforce_pr_isids;
+ u32 hw_block_size;
+ u32 block_size;
+ u32 hw_max_sectors;
+ u32 max_sectors;
+ u32 optimal_sectors;
+ u32 hw_queue_depth;
+ u32 queue_depth;
+ u32 task_timeout;
+ u32 max_unmap_lba_count;
+ u32 max_unmap_block_desc_count;
+ u32 unmap_granularity;
+ u32 unmap_granularity_alignment;
+ struct se_subsystem_dev *da_sub_dev;
+ struct config_group da_group;
+} ____cacheline_aligned;
+
+struct se_subsystem_dev {
+/* Used for struct se_subsystem_dev-->se_dev_alias, must be less than PAGE_SIZE */
+#define SE_DEV_ALIAS_LEN 512
+ unsigned char se_dev_alias[SE_DEV_ALIAS_LEN];
+/* Used for struct se_subsystem_dev->se_dev_udev_path[], must be less than PAGE_SIZE */
+#define SE_UDEV_PATH_LEN 512
+ unsigned char se_dev_udev_path[SE_UDEV_PATH_LEN];
+ u32 su_dev_flags;
+ struct se_hba *se_dev_hba;
+ struct se_device *se_dev_ptr;
+ struct se_dev_attrib se_dev_attrib;
+ /* T10 Asymmetric Logical Unit Assignment for Target Ports */
+ struct t10_alua t10_alua;
+ /* T10 Inquiry and VPD WWN Information */
+ struct t10_wwn t10_wwn;
+ /* T10 SPC-2 + SPC-3 Reservations */
+ struct t10_reservation_template t10_reservation;
+ spinlock_t se_dev_lock;
+ void *se_dev_su_ptr;
+ struct list_head g_se_dev_list;
+ struct config_group se_dev_group;
+ /* For T10 Reservations */
+ struct config_group se_dev_pr_group;
+} ____cacheline_aligned;
+
+#define T10_ALUA(su_dev) (&(su_dev)->t10_alua)
+#define T10_RES(su_dev) (&(su_dev)->t10_reservation)
+#define T10_PR_OPS(su_dev) (&(su_dev)->t10_reservation.pr_ops)
+
+struct se_device {
+ /* Set to 1 if thread is NOT sleeping on thread_sem */
+ u8 thread_active;
+ u8 dev_status_timer_flags;
+ /* RELATIVE TARGET PORT IDENTIFER Counter */
+ u16 dev_rpti_counter;
+ /* Used for SAM Task Attribute ordering */
+ u32 dev_cur_ordered_id;
+ u32 dev_flags;
+ u32 dev_port_count;
+ /* See transport_device_status_table */
+ u32 dev_status;
+ u32 dev_tcq_window_closed;
+ /* Physical device queue depth */
+ u32 queue_depth;
+ /* Used for SPC-2 reservations enforce of ISIDs */
+ u64 dev_res_bin_isid;
+ t10_task_attr_index_t dev_task_attr_type;
+ /* Pointer to transport specific device structure */
+ void *dev_ptr;
+ u32 dev_index;
+ u64 creation_time;
+ u32 num_resets;
+ u64 num_cmds;
+ u64 read_bytes;
+ u64 write_bytes;
+ spinlock_t stats_lock;
+ /* Active commands on this virtual SE device */
+ atomic_t active_cmds;
+ atomic_t simple_cmds;
+ atomic_t depth_left;
+ atomic_t dev_ordered_id;
+ atomic_t dev_tur_active;
+ atomic_t execute_tasks;
+ atomic_t dev_status_thr_count;
+ atomic_t dev_hoq_count;
+ atomic_t dev_ordered_sync;
+ struct se_obj dev_obj;
+ struct se_obj dev_access_obj;
+ struct se_obj dev_export_obj;
+ struct se_queue_obj *dev_queue_obj;
+ struct se_queue_obj *dev_status_queue_obj;
+ spinlock_t delayed_cmd_lock;
+ spinlock_t ordered_cmd_lock;
+ spinlock_t execute_task_lock;
+ spinlock_t state_task_lock;
+ spinlock_t dev_alua_lock;
+ spinlock_t dev_reservation_lock;
+ spinlock_t dev_state_lock;
+ spinlock_t dev_status_lock;
+ spinlock_t dev_status_thr_lock;
+ spinlock_t se_port_lock;
+ spinlock_t se_tmr_lock;
+ /* Used for legacy SPC-2 reservationsa */
+ struct se_node_acl *dev_reserved_node_acl;
+ /* Used for ALUA Logical Unit Group membership */
+ struct t10_alua_lu_gp_member *dev_alua_lu_gp_mem;
+ /* Used for SPC-3 Persistent Reservations */
+ struct t10_pr_registration *dev_pr_res_holder;
+ struct list_head dev_sep_list;
+ struct list_head dev_tmr_list;
+ struct timer_list dev_status_timer;
+ /* Pointer to descriptor for processing thread */
+ struct task_struct *process_thread;
+ pid_t process_thread_pid;
+ struct task_struct *dev_mgmt_thread;
+ struct list_head delayed_cmd_list;
+ struct list_head ordered_cmd_list;
+ struct list_head execute_task_list;
+ struct list_head state_task_list;
+ /* Pointer to associated SE HBA */
+ struct se_hba *se_hba;
+ struct se_subsystem_dev *se_sub_dev;
+ /* Pointer to template of function pointers for transport */
+ struct se_subsystem_api *transport;
+ /* Linked list for struct se_hba struct se_device list */
+ struct list_head dev_list;
+ /* Linked list for struct se_global->g_se_dev_list */
+ struct list_head g_se_dev_list;
+} ____cacheline_aligned;
+
+#define SE_DEV(cmd) ((struct se_device *)(cmd)->se_lun->lun_se_dev)
+#define SU_DEV(dev) ((struct se_subsystem_dev *)(dev)->se_sub_dev)
+#define DEV_ATTRIB(dev) (&(dev)->se_sub_dev->se_dev_attrib)
+#define DEV_T10_WWN(dev) (&(dev)->se_sub_dev->t10_wwn)
+
+struct se_hba {
+ u16 hba_tpgt;
+ u32 hba_id;
+ /* See hba_flags_table */
+ u32 hba_flags;
+ /* Virtual iSCSI devices attached. */
+ u32 dev_count;
+ u32 hba_index;
+ atomic_t dev_mib_access_count;
+ atomic_t load_balance_queue;
+ atomic_t left_queue_depth;
+ /* Maximum queue depth the HBA can handle. */
+ atomic_t max_queue_depth;
+ /* Pointer to transport specific host structure. */
+ void *hba_ptr;
+ /* Linked list for struct se_device */
+ struct list_head hba_dev_list;
+ struct list_head hba_list;
+ spinlock_t device_lock;
+ spinlock_t hba_queue_lock;
+ struct config_group hba_group;
+ struct mutex hba_access_mutex;
+ struct se_subsystem_api *transport;
+} ____cacheline_aligned;
+
+#define SE_HBA(d) ((struct se_hba *)(d)->se_hba)
+
+struct se_lun {
+ /* See transport_lun_status_table */
+ enum transport_lun_status_table lun_status;
+ u32 lun_access;
+ u32 lun_flags;
+ u32 unpacked_lun;
+ atomic_t lun_acl_count;
+ spinlock_t lun_acl_lock;
+ spinlock_t lun_cmd_lock;
+ spinlock_t lun_sep_lock;
+ struct completion lun_shutdown_comp;
+ struct list_head lun_cmd_list;
+ struct list_head lun_acl_list;
+ struct se_device *lun_se_dev;
+ struct config_group lun_group;
+ struct se_port *lun_sep;
+} ____cacheline_aligned;
+
+#define SE_LUN(c) ((struct se_lun *)(c)->se_lun)
+
+struct se_port {
+ /* RELATIVE TARGET PORT IDENTIFER */
+ u16 sep_rtpi;
+ int sep_tg_pt_secondary_stat;
+ int sep_tg_pt_secondary_write_md;
+ u32 sep_index;
+ struct scsi_port_stats sep_stats;
+ /* Used for ALUA Target Port Groups membership */
+ atomic_t sep_tg_pt_gp_active;
+ atomic_t sep_tg_pt_secondary_offline;
+ /* Used for PR ALL_TG_PT=1 */
+ atomic_t sep_tg_pt_ref_cnt;
+ spinlock_t sep_alua_lock;
+ struct mutex sep_tg_pt_md_mutex;
+ struct t10_alua_tg_pt_gp_member *sep_alua_tg_pt_gp_mem;
+ struct se_lun *sep_lun;
+ struct se_portal_group *sep_tpg;
+ struct list_head sep_alua_list;
+ struct list_head sep_list;
+} ____cacheline_aligned;
+
+struct se_tpg_np {
+ struct config_group tpg_np_group;
+} ____cacheline_aligned;
+
+struct se_portal_group {
+ /* Type of target portal group, see transport_tpg_type_table */
+ enum transport_tpg_type_table se_tpg_type;
+ /* Number of ACLed Initiator Nodes for this TPG */
+ u32 num_node_acls;
+ /* Used for PR SPEC_I_PT=1 and REGISTER_AND_MOVE */
+ atomic_t tpg_pr_ref_count;
+ /* Spinlock for adding/removing ACLed Nodes */
+ spinlock_t acl_node_lock;
+ /* Spinlock for adding/removing sessions */
+ spinlock_t session_lock;
+ spinlock_t tpg_lun_lock;
+ /* Pointer to $FABRIC_MOD portal group */
+ void *se_tpg_fabric_ptr;
+ struct list_head se_tpg_list;
+ /* linked list for initiator ACL list */
+ struct list_head acl_node_list;
+ struct se_lun *tpg_lun_list;
+ struct se_lun tpg_virt_lun0;
+ /* List of TCM sessions assoicated wth this TPG */
+ struct list_head tpg_sess_list;
+ /* Pointer to $FABRIC_MOD dependent code */
+ struct target_core_fabric_ops *se_tpg_tfo;
+ struct se_wwn *se_tpg_wwn;
+ struct config_group tpg_group;
+ struct config_group *tpg_default_groups[6];
+ struct config_group tpg_lun_group;
+ struct config_group tpg_np_group;
+ struct config_group tpg_acl_group;
+ struct config_group tpg_attrib_group;
+ struct config_group tpg_param_group;
+} ____cacheline_aligned;
+
+#define TPG_TFO(se_tpg) ((struct target_core_fabric_ops *)(se_tpg)->se_tpg_tfo)
+
+struct se_wwn {
+ struct target_fabric_configfs *wwn_tf;
+ struct config_group wwn_group;
+} ____cacheline_aligned;
+
+struct se_global {
+ u16 alua_lu_gps_counter;
+ int g_sub_api_initialized;
+ u32 in_shutdown;
+ u32 alua_lu_gps_count;
+ u32 g_hba_id_counter;
+ struct config_group target_core_hbagroup;
+ struct config_group alua_group;
+ struct config_group alua_lu_gps_group;
+ struct list_head g_lu_gps_list;
+ struct list_head g_se_tpg_list;
+ struct list_head g_hba_list;
+ struct list_head g_se_dev_list;
+ struct se_hba *g_lun0_hba;
+ struct se_subsystem_dev *g_lun0_su_dev;
+ struct se_device *g_lun0_dev;
+ struct t10_alua_lu_gp *default_lu_gp;
+ spinlock_t g_device_lock;
+ spinlock_t hba_lock;
+ spinlock_t se_tpg_lock;
+ spinlock_t lu_gps_lock;
+ spinlock_t plugin_class_lock;
+} ____cacheline_aligned;
+
+#endif /* TARGET_CORE_BASE_H */
diff --git a/include/target/target_core_fabric_ops.h b/include/target/target_core_fabric_ops.h
new file mode 100644
index 0000000..f3ac12b
--- /dev/null
+++ b/include/target/target_core_fabric_ops.h
@@ -0,0 +1,100 @@
+/* Defined in target_core_configfs.h */
+struct target_fabric_configfs;
+
+struct target_core_fabric_ops {
+ struct configfs_subsystem *tf_subsys;
+ /*
+ * Optional to signal struct se_task->task_sg[] padding entries
+ * for scatterlist chaining using transport_do_task_sg_link(),
+ * disabled by default
+ */
+ int task_sg_chaining:1;
+ char *(*get_fabric_name)(void);
+ u8 (*get_fabric_proto_ident)(struct se_portal_group *);
+ char *(*tpg_get_wwn)(struct se_portal_group *);
+ u16 (*tpg_get_tag)(struct se_portal_group *);
+ u32 (*tpg_get_default_depth)(struct se_portal_group *);
+ u32 (*tpg_get_pr_transport_id)(struct se_portal_group *,
+ struct se_node_acl *,
+ struct t10_pr_registration *, int *,
+ unsigned char *);
+ u32 (*tpg_get_pr_transport_id_len)(struct se_portal_group *,
+ struct se_node_acl *,
+ struct t10_pr_registration *, int *);
+ char *(*tpg_parse_pr_out_transport_id)(struct se_portal_group *,
+ const char *, u32 *, char **);
+ int (*tpg_check_demo_mode)(struct se_portal_group *);
+ int (*tpg_check_demo_mode_cache)(struct se_portal_group *);
+ int (*tpg_check_demo_mode_write_protect)(struct se_portal_group *);
+ int (*tpg_check_prod_mode_write_protect)(struct se_portal_group *);
+ struct se_node_acl *(*tpg_alloc_fabric_acl)(
+ struct se_portal_group *);
+ void (*tpg_release_fabric_acl)(struct se_portal_group *,
+ struct se_node_acl *);
+ u32 (*tpg_get_inst_index)(struct se_portal_group *);
+ /*
+ * Optional function pointer for TCM to perform command map
+ * from TCM processing thread context, for those struct se_cmd
+ * initally allocated in interrupt context.
+ */
+ int (*new_cmd_map)(struct se_cmd *);
+ /*
+ * Optional function pointer for TCM fabric modules that use
+ * Linux/NET sockets to allocate struct iovec array to struct se_cmd
+ */
+ int (*alloc_cmd_iovecs)(struct se_cmd *);
+ /*
+ * Optional to release struct se_cmd and fabric dependent allocated
+ * I/O descriptor in transport_cmd_check_stop()
+ */
+ void (*check_stop_free)(struct se_cmd *);
+ void (*release_cmd_to_pool)(struct se_cmd *);
+ void (*release_cmd_direct)(struct se_cmd *);
+ /*
+ * Called with spin_lock_bh(struct se_portal_group->session_lock held.
+ */
+ int (*shutdown_session)(struct se_session *);
+ void (*close_session)(struct se_session *);
+ void (*stop_session)(struct se_session *, int, int);
+ void (*fall_back_to_erl0)(struct se_session *);
+ int (*sess_logged_in)(struct se_session *);
+ u32 (*sess_get_index)(struct se_session *);
+ /*
+ * Used only for SCSI fabrics that contain multi-value TransportIDs
+ * (like iSCSI). All other SCSI fabrics should set this to NULL.
+ */
+ u32 (*sess_get_initiator_sid)(struct se_session *,
+ unsigned char *, u32);
+ int (*write_pending)(struct se_cmd *);
+ int (*write_pending_status)(struct se_cmd *);
+ void (*set_default_node_attributes)(struct se_node_acl *);
+ u32 (*get_task_tag)(struct se_cmd *);
+ int (*get_cmd_state)(struct se_cmd *);
+ void (*new_cmd_failure)(struct se_cmd *);
+ int (*queue_data_in)(struct se_cmd *);
+ int (*queue_status)(struct se_cmd *);
+ int (*queue_tm_rsp)(struct se_cmd *);
+ u16 (*set_fabric_sense_len)(struct se_cmd *, u32);
+ u16 (*get_fabric_sense_len)(void);
+ int (*is_state_remove)(struct se_cmd *);
+ u64 (*pack_lun)(unsigned int);
+ /*
+ * fabric module calls for target_core_fabric_configfs.c
+ */
+ struct se_wwn *(*fabric_make_wwn)(struct target_fabric_configfs *,
+ struct config_group *, const char *);
+ void (*fabric_drop_wwn)(struct se_wwn *);
+ struct se_portal_group *(*fabric_make_tpg)(struct se_wwn *,
+ struct config_group *, const char *);
+ void (*fabric_drop_tpg)(struct se_portal_group *);
+ int (*fabric_post_link)(struct se_portal_group *,
+ struct se_lun *);
+ void (*fabric_pre_unlink)(struct se_portal_group *,
+ struct se_lun *);
+ struct se_tpg_np *(*fabric_make_np)(struct se_portal_group *,
+ struct config_group *, const char *);
+ void (*fabric_drop_np)(struct se_tpg_np *);
+ struct se_node_acl *(*fabric_make_nodeacl)(struct se_portal_group *,
+ struct config_group *, const char *);
+ void (*fabric_drop_nodeacl)(struct se_node_acl *);
+};
--
1.7.3.4
^ permalink raw reply related [flat|nested] 22+ messages in thread* [PATCH v2 02c/03] target: Add SPC-4 explict and implict Asymmetric Logical Unit Access (ALUA)
2010-12-17 21:11 [PATCH v2 00/03] target: Initial merge of v4.0.0-rc6 for .38 Nicholas A. Bellinger
` (2 preceding siblings ...)
2010-12-17 21:11 ` [PATCH v2 02b/03] target: Add v4 base data structures and struct target_core_fabric_ops Nicholas A. Bellinger
@ 2010-12-17 21:11 ` Nicholas A. Bellinger
2010-12-17 21:11 ` [PATCH v2 02d/03] target: Add ConfigFS subsystem backstore infrastructure Nicholas A. Bellinger
` (16 subsequent siblings)
20 siblings, 0 replies; 22+ messages in thread
From: Nicholas A. Bellinger @ 2010-12-17 21:11 UTC (permalink / raw)
To: linux-scsi, James Bottomley; +Cc: Nicholas Bellinger
From: Nicholas Bellinger <nab@linux-iscsi.org>
This patch adds explict (via SET_TARGET_PORT_GROUPS) implict (via ConfigFS) ALUA support
supporting all primary and secondary access states. This also supports both the
Logical Unit and Target Port Groups abstractions defined by SPC-4
It also include support for writing ALUA metadata to /var/target/alua for saving Primary/Secondary
access states and status across target power loss, reboots, etc.
This is a complete implemention of SPC-4 ALUA, for more information please see:
http://www.linux-iscsi.org/index.php/ALUA
Signed-off-by: Nicholas A. Bellinger <nab@linux-iscsi.org>
---
drivers/target/target_core_alua.c | 1991 +++++++++++++++++++++++++++++++++++++
drivers/target/target_core_alua.h | 126 +++
2 files changed, 2117 insertions(+), 0 deletions(-)
create mode 100644 drivers/target/target_core_alua.c
create mode 100644 drivers/target/target_core_alua.h
diff --git a/drivers/target/target_core_alua.c b/drivers/target/target_core_alua.c
new file mode 100644
index 0000000..2c5fcfe
--- /dev/null
+++ b/drivers/target/target_core_alua.c
@@ -0,0 +1,1991 @@
+/*******************************************************************************
+ * Filename: target_core_alua.c
+ *
+ * This file contains SPC-3 compliant asymmetric logical unit assigntment (ALUA)
+ *
+ * Copyright (c) 2009-2010 Rising Tide Systems
+ * Copyright (c) 2009-2010 Linux-iSCSI.org
+ *
+ * Nicholas A. Bellinger <nab@kernel.org>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+ *
+ ******************************************************************************/
+
+#include <linux/version.h>
+#include <linux/slab.h>
+#include <linux/spinlock.h>
+#include <linux/configfs.h>
+#include <scsi/scsi.h>
+#include <scsi/scsi_cmnd.h>
+
+#include <target/target_core_base.h>
+#include <target/target_core_device.h>
+#include <target/target_core_transport.h>
+#include <target/target_core_fabric_ops.h>
+#include <target/target_core_configfs.h>
+
+#include "target_core_alua.h"
+#include "target_core_hba.h"
+#include "target_core_ua.h"
+
+static int core_alua_check_transition(int state, int *primary);
+static int core_alua_set_tg_pt_secondary_state(
+ struct t10_alua_tg_pt_gp_member *tg_pt_gp_mem,
+ struct se_port *port, int explict, int offline);
+
+/*
+ * REPORT_TARGET_PORT_GROUPS
+ *
+ * See spc4r17 section 6.27
+ */
+int core_emulate_report_target_port_groups(struct se_cmd *cmd)
+{
+ struct se_subsystem_dev *su_dev = SE_DEV(cmd)->se_sub_dev;
+ struct se_port *port;
+ struct t10_alua_tg_pt_gp *tg_pt_gp;
+ struct t10_alua_tg_pt_gp_member *tg_pt_gp_mem;
+ unsigned char *buf = (unsigned char *)T_TASK(cmd)->t_task_buf;
+ u32 rd_len = 0, off = 4; /* Skip over RESERVED area to first
+ Target port group descriptor */
+
+ spin_lock(&T10_ALUA(su_dev)->tg_pt_gps_lock);
+ list_for_each_entry(tg_pt_gp, &T10_ALUA(su_dev)->tg_pt_gps_list,
+ tg_pt_gp_list) {
+ /*
+ * PREF: Preferred target port bit, determine if this
+ * bit should be set for port group.
+ */
+ if (tg_pt_gp->tg_pt_gp_pref)
+ buf[off] = 0x80;
+ /*
+ * Set the ASYMMETRIC ACCESS State
+ */
+ buf[off++] |= (atomic_read(
+ &tg_pt_gp->tg_pt_gp_alua_access_state) & 0xff);
+ /*
+ * Set supported ASYMMETRIC ACCESS State bits
+ */
+ buf[off] = 0x80; /* T_SUP */
+ buf[off] |= 0x40; /* O_SUP */
+ buf[off] |= 0x8; /* U_SUP */
+ buf[off] |= 0x4; /* S_SUP */
+ buf[off] |= 0x2; /* AN_SUP */
+ buf[off++] |= 0x1; /* AO_SUP */
+ /*
+ * TARGET PORT GROUP
+ */
+ buf[off++] = ((tg_pt_gp->tg_pt_gp_id >> 8) & 0xff);
+ buf[off++] = (tg_pt_gp->tg_pt_gp_id & 0xff);
+
+ off++; /* Skip over Reserved */
+ /*
+ * STATUS CODE
+ */
+ buf[off++] = (tg_pt_gp->tg_pt_gp_alua_access_status & 0xff);
+ /*
+ * Vendor Specific field
+ */
+ buf[off++] = 0x00;
+ /*
+ * TARGET PORT COUNT
+ */
+ buf[off++] = (tg_pt_gp->tg_pt_gp_members & 0xff);
+ rd_len += 8;
+
+ spin_lock(&tg_pt_gp->tg_pt_gp_lock);
+ list_for_each_entry(tg_pt_gp_mem, &tg_pt_gp->tg_pt_gp_mem_list,
+ tg_pt_gp_mem_list) {
+ port = tg_pt_gp_mem->tg_pt;
+ /*
+ * Start Target Port descriptor format
+ *
+ * See spc4r17 section 6.2.7 Table 247
+ */
+ off += 2; /* Skip over Obsolete */
+ /*
+ * Set RELATIVE TARGET PORT IDENTIFIER
+ */
+ buf[off++] = ((port->sep_rtpi >> 8) & 0xff);
+ buf[off++] = (port->sep_rtpi & 0xff);
+ rd_len += 4;
+ }
+ spin_unlock(&tg_pt_gp->tg_pt_gp_lock);
+ }
+ spin_unlock(&T10_ALUA(su_dev)->tg_pt_gps_lock);
+ /*
+ * Set the RETURN DATA LENGTH set in the header of the DataIN Payload
+ */
+ buf[0] = ((rd_len >> 24) & 0xff);
+ buf[1] = ((rd_len >> 16) & 0xff);
+ buf[2] = ((rd_len >> 8) & 0xff);
+ buf[3] = (rd_len & 0xff);
+
+ return 0;
+}
+
+/*
+ * SET_TARGET_PORT_GROUPS for explict ALUA operation.
+ *
+ * See spc4r17 section 6.35
+ */
+int core_emulate_set_target_port_groups(struct se_cmd *cmd)
+{
+ struct se_device *dev = SE_DEV(cmd);
+ struct se_subsystem_dev *su_dev = SE_DEV(cmd)->se_sub_dev;
+ struct se_port *port, *l_port = SE_LUN(cmd)->lun_sep;
+ struct se_node_acl *nacl = SE_SESS(cmd)->se_node_acl;
+ struct t10_alua_tg_pt_gp *tg_pt_gp = NULL, *l_tg_pt_gp;
+ struct t10_alua_tg_pt_gp_member *tg_pt_gp_mem, *l_tg_pt_gp_mem;
+ unsigned char *buf = (unsigned char *)T_TASK(cmd)->t_task_buf;
+ unsigned char *ptr = &buf[4]; /* Skip over RESERVED area in header */
+ u32 len = 4; /* Skip over RESERVED area in header */
+ int alua_access_state, primary = 0, rc;
+ u16 tg_pt_id, rtpi;
+
+ if (!(l_port))
+ return PYX_TRANSPORT_LU_COMM_FAILURE;
+ /*
+ * Determine if explict ALUA via SET_TARGET_PORT_GROUPS is allowed
+ * for the local tg_pt_gp.
+ */
+ l_tg_pt_gp_mem = l_port->sep_alua_tg_pt_gp_mem;
+ if (!(l_tg_pt_gp_mem)) {
+ printk(KERN_ERR "Unable to access l_port->sep_alua_tg_pt_gp_mem\n");
+ return PYX_TRANSPORT_UNKNOWN_SAM_OPCODE;
+ }
+ spin_lock(&l_tg_pt_gp_mem->tg_pt_gp_mem_lock);
+ l_tg_pt_gp = l_tg_pt_gp_mem->tg_pt_gp;
+ if (!(l_tg_pt_gp)) {
+ spin_unlock(&l_tg_pt_gp_mem->tg_pt_gp_mem_lock);
+ printk(KERN_ERR "Unable to access *l_tg_pt_gp_mem->tg_pt_gp\n");
+ return PYX_TRANSPORT_UNKNOWN_SAM_OPCODE;
+ }
+ rc = (l_tg_pt_gp->tg_pt_gp_alua_access_type & TPGS_EXPLICT_ALUA);
+ spin_unlock(&l_tg_pt_gp_mem->tg_pt_gp_mem_lock);
+
+ if (!(rc)) {
+ printk(KERN_INFO "Unable to process SET_TARGET_PORT_GROUPS"
+ " while TPGS_EXPLICT_ALUA is disabled\n");
+ return PYX_TRANSPORT_UNKNOWN_SAM_OPCODE;
+ }
+
+ while (len < cmd->data_length) {
+ alua_access_state = (ptr[0] & 0x0f);
+ /*
+ * Check the received ALUA access state, and determine if
+ * the state is a primary or secondary target port asymmetric
+ * access state.
+ */
+ rc = core_alua_check_transition(alua_access_state, &primary);
+ if (rc != 0) {
+ /*
+ * If the SET TARGET PORT GROUPS attempts to establish
+ * an invalid combination of target port asymmetric
+ * access states or attempts to establish an
+ * unsupported target port asymmetric access state,
+ * then the command shall be terminated with CHECK
+ * CONDITION status, with the sense key set to ILLEGAL
+ * REQUEST, and the additional sense code set to INVALID
+ * FIELD IN PARAMETER LIST.
+ */
+ return PYX_TRANSPORT_INVALID_PARAMETER_LIST;
+ }
+ rc = -1;
+ /*
+ * If the ASYMMETRIC ACCESS STATE field (see table 267)
+ * specifies a primary target port asymmetric access state,
+ * then the TARGET PORT GROUP OR TARGET PORT field specifies
+ * a primary target port group for which the primary target
+ * port asymmetric access state shall be changed. If the
+ * ASYMMETRIC ACCESS STATE field specifies a secondary target
+ * port asymmetric access state, then the TARGET PORT GROUP OR
+ * TARGET PORT field specifies the relative target port
+ * identifier (see 3.1.120) of the target port for which the
+ * secondary target port asymmetric access state shall be
+ * changed.
+ */
+ if (primary) {
+ tg_pt_id = ((ptr[2] << 8) & 0xff);
+ tg_pt_id |= (ptr[3] & 0xff);
+ /*
+ * Locate the matching target port group ID from
+ * the global tg_pt_gp list
+ */
+ spin_lock(&T10_ALUA(su_dev)->tg_pt_gps_lock);
+ list_for_each_entry(tg_pt_gp,
+ &T10_ALUA(su_dev)->tg_pt_gps_list,
+ tg_pt_gp_list) {
+ if (!(tg_pt_gp->tg_pt_gp_valid_id))
+ continue;
+
+ if (tg_pt_id != tg_pt_gp->tg_pt_gp_id)
+ continue;
+
+ atomic_inc(&tg_pt_gp->tg_pt_gp_ref_cnt);
+ smp_mb__after_atomic_inc();
+ spin_unlock(&T10_ALUA(su_dev)->tg_pt_gps_lock);
+
+ rc = core_alua_do_port_transition(tg_pt_gp,
+ dev, l_port, nacl,
+ alua_access_state, 1);
+
+ spin_lock(&T10_ALUA(su_dev)->tg_pt_gps_lock);
+ atomic_dec(&tg_pt_gp->tg_pt_gp_ref_cnt);
+ smp_mb__after_atomic_dec();
+ break;
+ }
+ spin_unlock(&T10_ALUA(su_dev)->tg_pt_gps_lock);
+ /*
+ * If not matching target port group ID can be located
+ * throw an exception with ASCQ: INVALID_PARAMETER_LIST
+ */
+ if (rc != 0)
+ return PYX_TRANSPORT_INVALID_PARAMETER_LIST;
+ } else {
+ /*
+ * Extact the RELATIVE TARGET PORT IDENTIFIER to identify
+ * the Target Port in question for the the incoming
+ * SET_TARGET_PORT_GROUPS op.
+ */
+ rtpi = ((ptr[2] << 8) & 0xff);
+ rtpi |= (ptr[3] & 0xff);
+ /*
+ * Locate the matching relative target port identifer
+ * for the struct se_device storage object.
+ */
+ spin_lock(&dev->se_port_lock);
+ list_for_each_entry(port, &dev->dev_sep_list,
+ sep_list) {
+ if (port->sep_rtpi != rtpi)
+ continue;
+
+ tg_pt_gp_mem = port->sep_alua_tg_pt_gp_mem;
+ spin_unlock(&dev->se_port_lock);
+
+ rc = core_alua_set_tg_pt_secondary_state(
+ tg_pt_gp_mem, port, 1, 1);
+
+ spin_lock(&dev->se_port_lock);
+ break;
+ }
+ spin_unlock(&dev->se_port_lock);
+ /*
+ * If not matching relative target port identifier can
+ * be located, throw an exception with ASCQ:
+ * INVALID_PARAMETER_LIST
+ */
+ if (rc != 0)
+ return PYX_TRANSPORT_INVALID_PARAMETER_LIST;
+ }
+
+ ptr += 4;
+ len += 4;
+ }
+
+ return 0;
+}
+
+static inline int core_alua_state_nonoptimized(
+ struct se_cmd *cmd,
+ unsigned char *cdb,
+ int nonop_delay_msecs,
+ u8 *alua_ascq)
+{
+ /*
+ * Set SCF_ALUA_NON_OPTIMIZED here, this value will be checked
+ * later to determine if processing of this cmd needs to be
+ * temporarily delayed for the Active/NonOptimized primary access state.
+ */
+ cmd->se_cmd_flags |= SCF_ALUA_NON_OPTIMIZED;
+ cmd->alua_nonop_delay = nonop_delay_msecs;
+ return 0;
+}
+
+static inline int core_alua_state_standby(
+ struct se_cmd *cmd,
+ unsigned char *cdb,
+ u8 *alua_ascq)
+{
+ /*
+ * Allowed CDBs for ALUA_ACCESS_STATE_STANDBY as defined by
+ * spc4r17 section 5.9.2.4.4
+ */
+ switch (cdb[0]) {
+ case INQUIRY:
+ case LOG_SELECT:
+ case LOG_SENSE:
+ case MODE_SELECT:
+ case MODE_SENSE:
+ case REPORT_LUNS:
+ case RECEIVE_DIAGNOSTIC:
+ case SEND_DIAGNOSTIC:
+ case MAINTENANCE_IN:
+ switch (cdb[1]) {
+ case MI_REPORT_TARGET_PGS:
+ return 0;
+ default:
+ *alua_ascq = ASCQ_04H_ALUA_TG_PT_STANDBY;
+ return 1;
+ }
+ case MAINTENANCE_OUT:
+ switch (cdb[1]) {
+ case MO_SET_TARGET_PGS:
+ return 0;
+ default:
+ *alua_ascq = ASCQ_04H_ALUA_TG_PT_STANDBY;
+ return 1;
+ }
+ case REQUEST_SENSE:
+ case PERSISTENT_RESERVE_IN:
+ case PERSISTENT_RESERVE_OUT:
+ case READ_BUFFER:
+ case WRITE_BUFFER:
+ return 0;
+ default:
+ *alua_ascq = ASCQ_04H_ALUA_TG_PT_STANDBY;
+ return 1;
+ }
+
+ return 0;
+}
+
+static inline int core_alua_state_unavailable(
+ struct se_cmd *cmd,
+ unsigned char *cdb,
+ u8 *alua_ascq)
+{
+ /*
+ * Allowed CDBs for ALUA_ACCESS_STATE_UNAVAILABLE as defined by
+ * spc4r17 section 5.9.2.4.5
+ */
+ switch (cdb[0]) {
+ case INQUIRY:
+ case REPORT_LUNS:
+ case MAINTENANCE_IN:
+ switch (cdb[1]) {
+ case MI_REPORT_TARGET_PGS:
+ return 0;
+ default:
+ *alua_ascq = ASCQ_04H_ALUA_TG_PT_UNAVAILABLE;
+ return 1;
+ }
+ case MAINTENANCE_OUT:
+ switch (cdb[1]) {
+ case MO_SET_TARGET_PGS:
+ return 0;
+ default:
+ *alua_ascq = ASCQ_04H_ALUA_TG_PT_UNAVAILABLE;
+ return 1;
+ }
+ case REQUEST_SENSE:
+ case READ_BUFFER:
+ case WRITE_BUFFER:
+ return 0;
+ default:
+ *alua_ascq = ASCQ_04H_ALUA_TG_PT_UNAVAILABLE;
+ return 1;
+ }
+
+ return 0;
+}
+
+static inline int core_alua_state_transition(
+ struct se_cmd *cmd,
+ unsigned char *cdb,
+ u8 *alua_ascq)
+{
+ /*
+ * Allowed CDBs for ALUA_ACCESS_STATE_TRANSITIO as defined by
+ * spc4r17 section 5.9.2.5
+ */
+ switch (cdb[0]) {
+ case INQUIRY:
+ case REPORT_LUNS:
+ case MAINTENANCE_IN:
+ switch (cdb[1]) {
+ case MI_REPORT_TARGET_PGS:
+ return 0;
+ default:
+ *alua_ascq = ASCQ_04H_ALUA_STATE_TRANSITION;
+ return 1;
+ }
+ case REQUEST_SENSE:
+ case READ_BUFFER:
+ case WRITE_BUFFER:
+ return 0;
+ default:
+ *alua_ascq = ASCQ_04H_ALUA_STATE_TRANSITION;
+ return 1;
+ }
+
+ return 0;
+}
+
+/*
+ * Used for alua_type SPC_ALUA_PASSTHROUGH and SPC2_ALUA_DISABLED
+ * in transport_cmd_sequencer(). This function is assigned to
+ * struct t10_alua *->state_check() in core_setup_alua()
+ */
+static int core_alua_state_check_nop(
+ struct se_cmd *cmd,
+ unsigned char *cdb,
+ u8 *alua_ascq)
+{
+ return 0;
+}
+
+/*
+ * Used for alua_type SPC3_ALUA_EMULATED in transport_cmd_sequencer().
+ * This function is assigned to struct t10_alua *->state_check() in
+ * core_setup_alua()
+ *
+ * Also, this function can return three different return codes to
+ * signal transport_generic_cmd_sequencer()
+ *
+ * return 1: Is used to signal LUN not accecsable, and check condition/not ready
+ * return 0: Used to signal success
+ * reutrn -1: Used to signal failure, and invalid cdb field
+ */
+static int core_alua_state_check(
+ struct se_cmd *cmd,
+ unsigned char *cdb,
+ u8 *alua_ascq)
+{
+ struct se_lun *lun = SE_LUN(cmd);
+ struct se_port *port = lun->lun_sep;
+ struct t10_alua_tg_pt_gp *tg_pt_gp;
+ struct t10_alua_tg_pt_gp_member *tg_pt_gp_mem;
+ int out_alua_state, nonop_delay_msecs;
+
+ if (!(port))
+ return 0;
+ /*
+ * First, check for a struct se_port specific secondary ALUA target port
+ * access state: OFFLINE
+ */
+ if (atomic_read(&port->sep_tg_pt_secondary_offline)) {
+ *alua_ascq = ASCQ_04H_ALUA_OFFLINE;
+ printk(KERN_INFO "ALUA: Got secondary offline status for local"
+ " target port\n");
+ *alua_ascq = ASCQ_04H_ALUA_OFFLINE;
+ return 1;
+ }
+ /*
+ * Second, obtain the struct t10_alua_tg_pt_gp_member pointer to the
+ * ALUA target port group, to obtain current ALUA access state.
+ * Otherwise look for the underlying struct se_device association with
+ * a ALUA logical unit group.
+ */
+ tg_pt_gp_mem = port->sep_alua_tg_pt_gp_mem;
+ spin_lock(&tg_pt_gp_mem->tg_pt_gp_mem_lock);
+ tg_pt_gp = tg_pt_gp_mem->tg_pt_gp;
+ out_alua_state = atomic_read(&tg_pt_gp->tg_pt_gp_alua_access_state);
+ nonop_delay_msecs = tg_pt_gp->tg_pt_gp_nonop_delay_msecs;
+ spin_unlock(&tg_pt_gp_mem->tg_pt_gp_mem_lock);
+ /*
+ * Process ALUA_ACCESS_STATE_ACTIVE_OPTMIZED in a seperate conditional
+ * statement so the complier knows explictly to check this case first.
+ * For the Optimized ALUA access state case, we want to process the
+ * incoming fabric cmd ASAP..
+ */
+ if (out_alua_state == ALUA_ACCESS_STATE_ACTIVE_OPTMIZED)
+ return 0;
+
+ switch (out_alua_state) {
+ case ALUA_ACCESS_STATE_ACTIVE_NON_OPTIMIZED:
+ return core_alua_state_nonoptimized(cmd, cdb,
+ nonop_delay_msecs, alua_ascq);
+ case ALUA_ACCESS_STATE_STANDBY:
+ return core_alua_state_standby(cmd, cdb, alua_ascq);
+ case ALUA_ACCESS_STATE_UNAVAILABLE:
+ return core_alua_state_unavailable(cmd, cdb, alua_ascq);
+ case ALUA_ACCESS_STATE_TRANSITION:
+ return core_alua_state_transition(cmd, cdb, alua_ascq);
+ /*
+ * OFFLINE is a secondary ALUA target port group access state, that is
+ * handled above with struct se_port->sep_tg_pt_secondary_offline=1
+ */
+ case ALUA_ACCESS_STATE_OFFLINE:
+ default:
+ printk(KERN_ERR "Unknown ALUA access state: 0x%02x\n",
+ out_alua_state);
+ return -1;
+ }
+
+ return 0;
+}
+
+/*
+ * Check implict and explict ALUA state change request.
+ */
+static int core_alua_check_transition(int state, int *primary)
+{
+ switch (state) {
+ case ALUA_ACCESS_STATE_ACTIVE_OPTMIZED:
+ case ALUA_ACCESS_STATE_ACTIVE_NON_OPTIMIZED:
+ case ALUA_ACCESS_STATE_STANDBY:
+ case ALUA_ACCESS_STATE_UNAVAILABLE:
+ /*
+ * OPTIMIZED, NON-OPTIMIZED, STANDBY and UNAVAILABLE are
+ * defined as primary target port asymmetric access states.
+ */
+ *primary = 1;
+ break;
+ case ALUA_ACCESS_STATE_OFFLINE:
+ /*
+ * OFFLINE state is defined as a secondary target port
+ * asymmetric access state.
+ */
+ *primary = 0;
+ break;
+ default:
+ printk(KERN_ERR "Unknown ALUA access state: 0x%02x\n", state);
+ return -1;
+ }
+
+ return 0;
+}
+
+static char *core_alua_dump_state(int state)
+{
+ switch (state) {
+ case ALUA_ACCESS_STATE_ACTIVE_OPTMIZED:
+ return "Active/Optimized";
+ case ALUA_ACCESS_STATE_ACTIVE_NON_OPTIMIZED:
+ return "Active/NonOptimized";
+ case ALUA_ACCESS_STATE_STANDBY:
+ return "Standby";
+ case ALUA_ACCESS_STATE_UNAVAILABLE:
+ return "Unavailable";
+ case ALUA_ACCESS_STATE_OFFLINE:
+ return "Offline";
+ default:
+ return "Unknown";
+ }
+
+ return NULL;
+}
+
+char *core_alua_dump_status(int status)
+{
+ switch (status) {
+ case ALUA_STATUS_NONE:
+ return "None";
+ case ALUA_STATUS_ALTERED_BY_EXPLICT_STPG:
+ return "Altered by Explict STPG";
+ case ALUA_STATUS_ALTERED_BY_IMPLICT_ALUA:
+ return "Altered by Implict ALUA";
+ default:
+ return "Unknown";
+ }
+
+ return NULL;
+}
+
+/*
+ * Used by fabric modules to determine when we need to delay processing
+ * for the Active/NonOptimized paths..
+ */
+int core_alua_check_nonop_delay(
+ struct se_cmd *cmd)
+{
+ if (!(cmd->se_cmd_flags & SCF_ALUA_NON_OPTIMIZED))
+ return 0;
+ if (in_interrupt())
+ return 0;
+ /*
+ * The ALUA Active/NonOptimized access state delay can be disabled
+ * in via configfs with a value of zero
+ */
+ if (!(cmd->alua_nonop_delay))
+ return 0;
+ /*
+ * struct se_cmd->alua_nonop_delay gets set by a target port group
+ * defined interval in core_alua_state_nonoptimized()
+ */
+ msleep_interruptible(cmd->alua_nonop_delay);
+ return 0;
+}
+EXPORT_SYMBOL(core_alua_check_nonop_delay);
+
+/*
+ * Called with tg_pt_gp->tg_pt_gp_md_mutex or tg_pt_gp_mem->sep_tg_pt_md_mutex
+ *
+ */
+static int core_alua_write_tpg_metadata(
+ const char *path,
+ unsigned char *md_buf,
+ u32 md_buf_len)
+{
+ mm_segment_t old_fs;
+ struct file *file;
+ struct iovec iov[1];
+ int flags = O_RDWR | O_CREAT | O_TRUNC, ret;
+
+ memset(iov, 0, sizeof(struct iovec));
+
+ file = filp_open(path, flags, 0600);
+ if (IS_ERR(file) || !file || !file->f_dentry) {
+ printk(KERN_ERR "filp_open(%s) for ALUA metadata failed\n",
+ path);
+ return -ENODEV;
+ }
+
+ iov[0].iov_base = &md_buf[0];
+ iov[0].iov_len = md_buf_len;
+
+ old_fs = get_fs();
+ set_fs(get_ds());
+ ret = vfs_writev(file, &iov[0], 1, &file->f_pos);
+ set_fs(old_fs);
+
+ if (ret < 0) {
+ printk(KERN_ERR "Error writing ALUA metadata file: %s\n", path);
+ filp_close(file, NULL);
+ return -EIO;
+ }
+ filp_close(file, NULL);
+
+ return 0;
+}
+
+/*
+ * Called with tg_pt_gp->tg_pt_gp_md_mutex held
+ */
+static int core_alua_update_tpg_primary_metadata(
+ struct t10_alua_tg_pt_gp *tg_pt_gp,
+ int primary_state,
+ unsigned char *md_buf)
+{
+ struct se_subsystem_dev *su_dev = tg_pt_gp->tg_pt_gp_su_dev;
+ struct t10_wwn *wwn = &su_dev->t10_wwn;
+ char path[ALUA_METADATA_PATH_LEN];
+ int len;
+
+ memset(path, 0, ALUA_METADATA_PATH_LEN);
+
+ len = snprintf(md_buf, tg_pt_gp->tg_pt_gp_md_buf_len,
+ "tg_pt_gp_id=%hu\n"
+ "alua_access_state=0x%02x\n"
+ "alua_access_status=0x%02x\n",
+ tg_pt_gp->tg_pt_gp_id, primary_state,
+ tg_pt_gp->tg_pt_gp_alua_access_status);
+
+ snprintf(path, ALUA_METADATA_PATH_LEN,
+ "/var/target/alua/tpgs_%s/%s", &wwn->unit_serial[0],
+ config_item_name(&tg_pt_gp->tg_pt_gp_group.cg_item));
+
+ return core_alua_write_tpg_metadata(path, md_buf, len);
+}
+
+static int core_alua_do_transition_tg_pt(
+ struct t10_alua_tg_pt_gp *tg_pt_gp,
+ struct se_port *l_port,
+ struct se_node_acl *nacl,
+ unsigned char *md_buf,
+ int new_state,
+ int explict)
+{
+ struct se_dev_entry *se_deve;
+ struct se_lun_acl *lacl;
+ struct se_port *port;
+ struct t10_alua_tg_pt_gp_member *mem;
+ int old_state = 0;
+ /*
+ * Save the old primary ALUA access state, and set the current state
+ * to ALUA_ACCESS_STATE_TRANSITION.
+ */
+ old_state = atomic_read(&tg_pt_gp->tg_pt_gp_alua_access_state);
+ atomic_set(&tg_pt_gp->tg_pt_gp_alua_access_state,
+ ALUA_ACCESS_STATE_TRANSITION);
+ tg_pt_gp->tg_pt_gp_alua_access_status = (explict) ?
+ ALUA_STATUS_ALTERED_BY_EXPLICT_STPG :
+ ALUA_STATUS_ALTERED_BY_IMPLICT_ALUA;
+ /*
+ * Check for the optional ALUA primary state transition delay
+ */
+ if (tg_pt_gp->tg_pt_gp_trans_delay_msecs != 0)
+ msleep_interruptible(tg_pt_gp->tg_pt_gp_trans_delay_msecs);
+
+ spin_lock(&tg_pt_gp->tg_pt_gp_lock);
+ list_for_each_entry(mem, &tg_pt_gp->tg_pt_gp_mem_list,
+ tg_pt_gp_mem_list) {
+ port = mem->tg_pt;
+ /*
+ * After an implicit target port asymmetric access state
+ * change, a device server shall establish a unit attention
+ * condition for the initiator port associated with every I_T
+ * nexus with the additional sense code set to ASYMMETRIC
+ * ACCESS STATE CHAGED.
+ *
+ * After an explicit target port asymmetric access state
+ * change, a device server shall establish a unit attention
+ * condition with the additional sense code set to ASYMMETRIC
+ * ACCESS STATE CHANGED for the initiator port associated with
+ * every I_T nexus other than the I_T nexus on which the SET
+ * TARGET PORT GROUPS command
+ */
+ atomic_inc(&mem->tg_pt_gp_mem_ref_cnt);
+ smp_mb__after_atomic_inc();
+ spin_unlock(&tg_pt_gp->tg_pt_gp_lock);
+
+ spin_lock_bh(&port->sep_alua_lock);
+ list_for_each_entry(se_deve, &port->sep_alua_list,
+ alua_port_list) {
+ lacl = se_deve->se_lun_acl;
+ /*
+ * se_deve->se_lun_acl pointer may be NULL for a
+ * entry created without explict Node+MappedLUN ACLs
+ */
+ if (!(lacl))
+ continue;
+
+ if (explict &&
+ (nacl != NULL) && (nacl == lacl->se_lun_nacl) &&
+ (l_port != NULL) && (l_port == port))
+ continue;
+
+ core_scsi3_ua_allocate(lacl->se_lun_nacl,
+ se_deve->mapped_lun, 0x2A,
+ ASCQ_2AH_ASYMMETRIC_ACCESS_STATE_CHANGED);
+ }
+ spin_unlock_bh(&port->sep_alua_lock);
+
+ spin_lock(&tg_pt_gp->tg_pt_gp_lock);
+ atomic_dec(&mem->tg_pt_gp_mem_ref_cnt);
+ smp_mb__after_atomic_dec();
+ }
+ spin_unlock(&tg_pt_gp->tg_pt_gp_lock);
+ /*
+ * Update the ALUA metadata buf that has been allocated in
+ * core_alua_do_port_transition(), this metadata will be written
+ * to struct file.
+ *
+ * Note that there is the case where we do not want to update the
+ * metadata when the saved metadata is being parsed in userspace
+ * when setting the existing port access state and access status.
+ *
+ * Also note that the failure to write out the ALUA metadata to
+ * struct file does NOT affect the actual ALUA transition.
+ */
+ if (tg_pt_gp->tg_pt_gp_write_metadata) {
+ mutex_lock(&tg_pt_gp->tg_pt_gp_md_mutex);
+ core_alua_update_tpg_primary_metadata(tg_pt_gp,
+ new_state, md_buf);
+ mutex_unlock(&tg_pt_gp->tg_pt_gp_md_mutex);
+ }
+ /*
+ * Set the current primary ALUA access state to the requested new state
+ */
+ atomic_set(&tg_pt_gp->tg_pt_gp_alua_access_state, new_state);
+
+ printk(KERN_INFO "Successful %s ALUA transition TG PT Group: %s ID: %hu"
+ " from primary access state %s to %s\n", (explict) ? "explict" :
+ "implict", config_item_name(&tg_pt_gp->tg_pt_gp_group.cg_item),
+ tg_pt_gp->tg_pt_gp_id, core_alua_dump_state(old_state),
+ core_alua_dump_state(new_state));
+
+ return 0;
+}
+
+int core_alua_do_port_transition(
+ struct t10_alua_tg_pt_gp *l_tg_pt_gp,
+ struct se_device *l_dev,
+ struct se_port *l_port,
+ struct se_node_acl *l_nacl,
+ int new_state,
+ int explict)
+{
+ struct se_device *dev;
+ struct se_port *port;
+ struct se_subsystem_dev *su_dev;
+ struct se_node_acl *nacl;
+ struct t10_alua_lu_gp *lu_gp;
+ struct t10_alua_lu_gp_member *lu_gp_mem, *local_lu_gp_mem;
+ struct t10_alua_tg_pt_gp *tg_pt_gp;
+ unsigned char *md_buf;
+ int primary;
+
+ if (core_alua_check_transition(new_state, &primary) != 0)
+ return -EINVAL;
+
+ md_buf = kzalloc(l_tg_pt_gp->tg_pt_gp_md_buf_len, GFP_KERNEL);
+ if (!(md_buf)) {
+ printk("Unable to allocate buf for ALUA metadata\n");
+ return -ENOMEM;
+ }
+
+ local_lu_gp_mem = l_dev->dev_alua_lu_gp_mem;
+ spin_lock(&local_lu_gp_mem->lu_gp_mem_lock);
+ lu_gp = local_lu_gp_mem->lu_gp;
+ atomic_inc(&lu_gp->lu_gp_ref_cnt);
+ smp_mb__after_atomic_inc();
+ spin_unlock(&local_lu_gp_mem->lu_gp_mem_lock);
+ /*
+ * For storage objects that are members of the 'default_lu_gp',
+ * we only do transition on the passed *l_tp_pt_gp, and not
+ * on all of the matching target port groups IDs in default_lu_gp.
+ */
+ if (!(lu_gp->lu_gp_id)) {
+ /*
+ * core_alua_do_transition_tg_pt() will always return
+ * success.
+ */
+ core_alua_do_transition_tg_pt(l_tg_pt_gp, l_port, l_nacl,
+ md_buf, new_state, explict);
+ atomic_dec(&lu_gp->lu_gp_ref_cnt);
+ smp_mb__after_atomic_dec();
+ kfree(md_buf);
+ return 0;
+ }
+ /*
+ * For all other LU groups aside from 'default_lu_gp', walk all of
+ * the associated storage objects looking for a matching target port
+ * group ID from the local target port group.
+ */
+ spin_lock(&lu_gp->lu_gp_lock);
+ list_for_each_entry(lu_gp_mem, &lu_gp->lu_gp_mem_list,
+ lu_gp_mem_list) {
+
+ dev = lu_gp_mem->lu_gp_mem_dev;
+ su_dev = dev->se_sub_dev;
+ atomic_inc(&lu_gp_mem->lu_gp_mem_ref_cnt);
+ smp_mb__after_atomic_inc();
+ spin_unlock(&lu_gp->lu_gp_lock);
+
+ spin_lock(&T10_ALUA(su_dev)->tg_pt_gps_lock);
+ list_for_each_entry(tg_pt_gp,
+ &T10_ALUA(su_dev)->tg_pt_gps_list,
+ tg_pt_gp_list) {
+
+ if (!(tg_pt_gp->tg_pt_gp_valid_id))
+ continue;
+ /*
+ * If the target behavior port asymmetric access state
+ * is changed for any target port group accessiable via
+ * a logical unit within a LU group, the target port
+ * behavior group asymmetric access states for the same
+ * target port group accessible via other logical units
+ * in that LU group will also change.
+ */
+ if (l_tg_pt_gp->tg_pt_gp_id != tg_pt_gp->tg_pt_gp_id)
+ continue;
+
+ if (l_tg_pt_gp == tg_pt_gp) {
+ port = l_port;
+ nacl = l_nacl;
+ } else {
+ port = NULL;
+ nacl = NULL;
+ }
+ atomic_inc(&tg_pt_gp->tg_pt_gp_ref_cnt);
+ smp_mb__after_atomic_inc();
+ spin_unlock(&T10_ALUA(su_dev)->tg_pt_gps_lock);
+ /*
+ * core_alua_do_transition_tg_pt() will always return
+ * success.
+ */
+ core_alua_do_transition_tg_pt(tg_pt_gp, port,
+ nacl, md_buf, new_state, explict);
+
+ spin_lock(&T10_ALUA(su_dev)->tg_pt_gps_lock);
+ atomic_dec(&tg_pt_gp->tg_pt_gp_ref_cnt);
+ smp_mb__after_atomic_dec();
+ }
+ spin_unlock(&T10_ALUA(su_dev)->tg_pt_gps_lock);
+
+ spin_lock(&lu_gp->lu_gp_lock);
+ atomic_dec(&lu_gp_mem->lu_gp_mem_ref_cnt);
+ smp_mb__after_atomic_dec();
+ }
+ spin_unlock(&lu_gp->lu_gp_lock);
+
+ printk(KERN_INFO "Successfully processed LU Group: %s all ALUA TG PT"
+ " Group IDs: %hu %s transition to primary state: %s\n",
+ config_item_name(&lu_gp->lu_gp_group.cg_item),
+ l_tg_pt_gp->tg_pt_gp_id, (explict) ? "explict" : "implict",
+ core_alua_dump_state(new_state));
+
+ atomic_dec(&lu_gp->lu_gp_ref_cnt);
+ smp_mb__after_atomic_dec();
+ kfree(md_buf);
+ return 0;
+}
+
+/*
+ * Called with tg_pt_gp_mem->sep_tg_pt_md_mutex held
+ */
+static int core_alua_update_tpg_secondary_metadata(
+ struct t10_alua_tg_pt_gp_member *tg_pt_gp_mem,
+ struct se_port *port,
+ unsigned char *md_buf,
+ u32 md_buf_len)
+{
+ struct se_portal_group *se_tpg = port->sep_tpg;
+ char path[ALUA_METADATA_PATH_LEN], wwn[ALUA_SECONDARY_METADATA_WWN_LEN];
+ int len;
+
+ memset(path, 0, ALUA_METADATA_PATH_LEN);
+ memset(wwn, 0, ALUA_SECONDARY_METADATA_WWN_LEN);
+
+ len = snprintf(wwn, ALUA_SECONDARY_METADATA_WWN_LEN, "%s",
+ TPG_TFO(se_tpg)->tpg_get_wwn(se_tpg));
+
+ if (TPG_TFO(se_tpg)->tpg_get_tag != NULL)
+ snprintf(wwn+len, ALUA_SECONDARY_METADATA_WWN_LEN-len, "+%hu",
+ TPG_TFO(se_tpg)->tpg_get_tag(se_tpg));
+
+ len = snprintf(md_buf, md_buf_len, "alua_tg_pt_offline=%d\n"
+ "alua_tg_pt_status=0x%02x\n",
+ atomic_read(&port->sep_tg_pt_secondary_offline),
+ port->sep_tg_pt_secondary_stat);
+
+ snprintf(path, ALUA_METADATA_PATH_LEN, "/var/target/alua/%s/%s/lun_%u",
+ TPG_TFO(se_tpg)->get_fabric_name(), wwn,
+ port->sep_lun->unpacked_lun);
+
+ return core_alua_write_tpg_metadata(path, md_buf, len);
+}
+
+static int core_alua_set_tg_pt_secondary_state(
+ struct t10_alua_tg_pt_gp_member *tg_pt_gp_mem,
+ struct se_port *port,
+ int explict,
+ int offline)
+{
+ struct t10_alua_tg_pt_gp *tg_pt_gp;
+ unsigned char *md_buf;
+ u32 md_buf_len;
+ int trans_delay_msecs;
+
+ spin_lock(&tg_pt_gp_mem->tg_pt_gp_mem_lock);
+ tg_pt_gp = tg_pt_gp_mem->tg_pt_gp;
+ if (!(tg_pt_gp)) {
+ spin_unlock(&tg_pt_gp_mem->tg_pt_gp_mem_lock);
+ printk(KERN_ERR "Unable to complete secondary state"
+ " transition\n");
+ return -1;
+ }
+ trans_delay_msecs = tg_pt_gp->tg_pt_gp_trans_delay_msecs;
+ /*
+ * Set the secondary ALUA target port access state to OFFLINE
+ * or release the previously secondary state for struct se_port
+ */
+ if (offline)
+ atomic_set(&port->sep_tg_pt_secondary_offline, 1);
+ else
+ atomic_set(&port->sep_tg_pt_secondary_offline, 0);
+
+ md_buf_len = tg_pt_gp->tg_pt_gp_md_buf_len;
+ port->sep_tg_pt_secondary_stat = (explict) ?
+ ALUA_STATUS_ALTERED_BY_EXPLICT_STPG :
+ ALUA_STATUS_ALTERED_BY_IMPLICT_ALUA;
+
+ printk(KERN_INFO "Successful %s ALUA transition TG PT Group: %s ID: %hu"
+ " to secondary access state: %s\n", (explict) ? "explict" :
+ "implict", config_item_name(&tg_pt_gp->tg_pt_gp_group.cg_item),
+ tg_pt_gp->tg_pt_gp_id, (offline) ? "OFFLINE" : "ONLINE");
+
+ spin_unlock(&tg_pt_gp_mem->tg_pt_gp_mem_lock);
+ /*
+ * Do the optional transition delay after we set the secondary
+ * ALUA access state.
+ */
+ if (trans_delay_msecs != 0)
+ msleep_interruptible(trans_delay_msecs);
+ /*
+ * See if we need to update the ALUA fabric port metadata for
+ * secondary state and status
+ */
+ if (port->sep_tg_pt_secondary_write_md) {
+ md_buf = kzalloc(md_buf_len, GFP_KERNEL);
+ if (!(md_buf)) {
+ printk(KERN_ERR "Unable to allocate md_buf for"
+ " secondary ALUA access metadata\n");
+ return -1;
+ }
+ mutex_lock(&port->sep_tg_pt_md_mutex);
+ core_alua_update_tpg_secondary_metadata(tg_pt_gp_mem, port,
+ md_buf, md_buf_len);
+ mutex_unlock(&port->sep_tg_pt_md_mutex);
+
+ kfree(md_buf);
+ }
+
+ return 0;
+}
+
+struct t10_alua_lu_gp *
+core_alua_allocate_lu_gp(const char *name, int def_group)
+{
+ struct t10_alua_lu_gp *lu_gp;
+
+ lu_gp = kmem_cache_zalloc(t10_alua_lu_gp_cache, GFP_KERNEL);
+ if (!(lu_gp)) {
+ printk(KERN_ERR "Unable to allocate struct t10_alua_lu_gp\n");
+ return ERR_PTR(-ENOMEM);;
+ }
+ INIT_LIST_HEAD(&lu_gp->lu_gp_list);
+ INIT_LIST_HEAD(&lu_gp->lu_gp_mem_list);
+ spin_lock_init(&lu_gp->lu_gp_lock);
+ atomic_set(&lu_gp->lu_gp_ref_cnt, 0);
+
+ if (def_group) {
+ lu_gp->lu_gp_id = se_global->alua_lu_gps_counter++;;
+ lu_gp->lu_gp_valid_id = 1;
+ se_global->alua_lu_gps_count++;
+ }
+
+ return lu_gp;
+}
+
+int core_alua_set_lu_gp_id(struct t10_alua_lu_gp *lu_gp, u16 lu_gp_id)
+{
+ struct t10_alua_lu_gp *lu_gp_tmp;
+ u16 lu_gp_id_tmp;
+ /*
+ * The lu_gp->lu_gp_id may only be set once..
+ */
+ if (lu_gp->lu_gp_valid_id) {
+ printk(KERN_WARNING "ALUA LU Group already has a valid ID,"
+ " ignoring request\n");
+ return -1;
+ }
+
+ spin_lock(&se_global->lu_gps_lock);
+ if (se_global->alua_lu_gps_count == 0x0000ffff) {
+ printk(KERN_ERR "Maximum ALUA se_global->alua_lu_gps_count:"
+ " 0x0000ffff reached\n");
+ spin_unlock(&se_global->lu_gps_lock);
+ kmem_cache_free(t10_alua_lu_gp_cache, lu_gp);
+ return -1;
+ }
+again:
+ lu_gp_id_tmp = (lu_gp_id != 0) ? lu_gp_id :
+ se_global->alua_lu_gps_counter++;
+
+ list_for_each_entry(lu_gp_tmp, &se_global->g_lu_gps_list, lu_gp_list) {
+ if (lu_gp_tmp->lu_gp_id == lu_gp_id_tmp) {
+ if (!(lu_gp_id))
+ goto again;
+
+ printk(KERN_WARNING "ALUA Logical Unit Group ID: %hu"
+ " already exists, ignoring request\n",
+ lu_gp_id);
+ spin_unlock(&se_global->lu_gps_lock);
+ return -1;
+ }
+ }
+
+ lu_gp->lu_gp_id = lu_gp_id_tmp;
+ lu_gp->lu_gp_valid_id = 1;
+ list_add_tail(&lu_gp->lu_gp_list, &se_global->g_lu_gps_list);
+ se_global->alua_lu_gps_count++;
+ spin_unlock(&se_global->lu_gps_lock);
+
+ return 0;
+}
+
+static struct t10_alua_lu_gp_member *
+core_alua_allocate_lu_gp_mem(struct se_device *dev)
+{
+ struct t10_alua_lu_gp_member *lu_gp_mem;
+
+ lu_gp_mem = kmem_cache_zalloc(t10_alua_lu_gp_mem_cache, GFP_KERNEL);
+ if (!(lu_gp_mem)) {
+ printk(KERN_ERR "Unable to allocate struct t10_alua_lu_gp_member\n");
+ return ERR_PTR(-ENOMEM);
+ }
+ INIT_LIST_HEAD(&lu_gp_mem->lu_gp_mem_list);
+ spin_lock_init(&lu_gp_mem->lu_gp_mem_lock);
+ atomic_set(&lu_gp_mem->lu_gp_mem_ref_cnt, 0);
+
+ lu_gp_mem->lu_gp_mem_dev = dev;
+ dev->dev_alua_lu_gp_mem = lu_gp_mem;
+
+ return lu_gp_mem;
+}
+
+void core_alua_free_lu_gp(struct t10_alua_lu_gp *lu_gp)
+{
+ struct t10_alua_lu_gp_member *lu_gp_mem, *lu_gp_mem_tmp;
+ /*
+ * Once we have reached this point, config_item_put() has
+ * already been called from target_core_alua_drop_lu_gp().
+ *
+ * Here, we remove the *lu_gp from the global list so that
+ * no associations can be made while we are releasing
+ * struct t10_alua_lu_gp.
+ */
+ spin_lock(&se_global->lu_gps_lock);
+ atomic_set(&lu_gp->lu_gp_shutdown, 1);
+ list_del(&lu_gp->lu_gp_list);
+ se_global->alua_lu_gps_count--;
+ spin_unlock(&se_global->lu_gps_lock);
+ /*
+ * Allow struct t10_alua_lu_gp * referenced by core_alua_get_lu_gp_by_name()
+ * in target_core_configfs.c:target_core_store_alua_lu_gp() to be
+ * released with core_alua_put_lu_gp_from_name()
+ */
+ while (atomic_read(&lu_gp->lu_gp_ref_cnt))
+ cpu_relax();
+ /*
+ * Release reference to struct t10_alua_lu_gp * from all associated
+ * struct se_device.
+ */
+ spin_lock(&lu_gp->lu_gp_lock);
+ list_for_each_entry_safe(lu_gp_mem, lu_gp_mem_tmp,
+ &lu_gp->lu_gp_mem_list, lu_gp_mem_list) {
+ if (lu_gp_mem->lu_gp_assoc) {
+ list_del(&lu_gp_mem->lu_gp_mem_list);
+ lu_gp->lu_gp_members--;
+ lu_gp_mem->lu_gp_assoc = 0;
+ }
+ spin_unlock(&lu_gp->lu_gp_lock);
+ /*
+ *
+ * lu_gp_mem is assoicated with a single
+ * struct se_device->dev_alua_lu_gp_mem, and is released when
+ * struct se_device is released via core_alua_free_lu_gp_mem().
+ *
+ * If the passed lu_gp does NOT match the default_lu_gp, assume
+ * we want to re-assocate a given lu_gp_mem with default_lu_gp.
+ */
+ spin_lock(&lu_gp_mem->lu_gp_mem_lock);
+ if (lu_gp != se_global->default_lu_gp)
+ __core_alua_attach_lu_gp_mem(lu_gp_mem,
+ se_global->default_lu_gp);
+ else
+ lu_gp_mem->lu_gp = NULL;
+ spin_unlock(&lu_gp_mem->lu_gp_mem_lock);
+
+ spin_lock(&lu_gp->lu_gp_lock);
+ }
+ spin_unlock(&lu_gp->lu_gp_lock);
+
+ kmem_cache_free(t10_alua_lu_gp_cache, lu_gp);
+}
+
+void core_alua_free_lu_gp_mem(struct se_device *dev)
+{
+ struct se_subsystem_dev *su_dev = dev->se_sub_dev;
+ struct t10_alua *alua = T10_ALUA(su_dev);
+ struct t10_alua_lu_gp *lu_gp;
+ struct t10_alua_lu_gp_member *lu_gp_mem;
+
+ if (alua->alua_type != SPC3_ALUA_EMULATED)
+ return;
+
+ lu_gp_mem = dev->dev_alua_lu_gp_mem;
+ if (!(lu_gp_mem))
+ return;
+
+ while (atomic_read(&lu_gp_mem->lu_gp_mem_ref_cnt))
+ cpu_relax();
+
+ spin_lock(&lu_gp_mem->lu_gp_mem_lock);
+ lu_gp = lu_gp_mem->lu_gp;
+ if ((lu_gp)) {
+ spin_lock(&lu_gp->lu_gp_lock);
+ if (lu_gp_mem->lu_gp_assoc) {
+ list_del(&lu_gp_mem->lu_gp_mem_list);
+ lu_gp->lu_gp_members--;
+ lu_gp_mem->lu_gp_assoc = 0;
+ }
+ spin_unlock(&lu_gp->lu_gp_lock);
+ lu_gp_mem->lu_gp = NULL;
+ }
+ spin_unlock(&lu_gp_mem->lu_gp_mem_lock);
+
+ kmem_cache_free(t10_alua_lu_gp_mem_cache, lu_gp_mem);
+}
+
+struct t10_alua_lu_gp *core_alua_get_lu_gp_by_name(const char *name)
+{
+ struct t10_alua_lu_gp *lu_gp;
+ struct config_item *ci;
+
+ spin_lock(&se_global->lu_gps_lock);
+ list_for_each_entry(lu_gp, &se_global->g_lu_gps_list, lu_gp_list) {
+ if (!(lu_gp->lu_gp_valid_id))
+ continue;
+ ci = &lu_gp->lu_gp_group.cg_item;
+ if (!(strcmp(config_item_name(ci), name))) {
+ atomic_inc(&lu_gp->lu_gp_ref_cnt);
+ spin_unlock(&se_global->lu_gps_lock);
+ return lu_gp;
+ }
+ }
+ spin_unlock(&se_global->lu_gps_lock);
+
+ return NULL;
+}
+
+void core_alua_put_lu_gp_from_name(struct t10_alua_lu_gp *lu_gp)
+{
+ spin_lock(&se_global->lu_gps_lock);
+ atomic_dec(&lu_gp->lu_gp_ref_cnt);
+ spin_unlock(&se_global->lu_gps_lock);
+}
+
+/*
+ * Called with struct t10_alua_lu_gp_member->lu_gp_mem_lock
+ */
+void __core_alua_attach_lu_gp_mem(
+ struct t10_alua_lu_gp_member *lu_gp_mem,
+ struct t10_alua_lu_gp *lu_gp)
+{
+ spin_lock(&lu_gp->lu_gp_lock);
+ lu_gp_mem->lu_gp = lu_gp;
+ lu_gp_mem->lu_gp_assoc = 1;
+ list_add_tail(&lu_gp_mem->lu_gp_mem_list, &lu_gp->lu_gp_mem_list);
+ lu_gp->lu_gp_members++;
+ spin_unlock(&lu_gp->lu_gp_lock);
+}
+
+/*
+ * Called with struct t10_alua_lu_gp_member->lu_gp_mem_lock
+ */
+void __core_alua_drop_lu_gp_mem(
+ struct t10_alua_lu_gp_member *lu_gp_mem,
+ struct t10_alua_lu_gp *lu_gp)
+{
+ spin_lock(&lu_gp->lu_gp_lock);
+ list_del(&lu_gp_mem->lu_gp_mem_list);
+ lu_gp_mem->lu_gp = NULL;
+ lu_gp_mem->lu_gp_assoc = 0;
+ lu_gp->lu_gp_members--;
+ spin_unlock(&lu_gp->lu_gp_lock);
+}
+
+struct t10_alua_tg_pt_gp *core_alua_allocate_tg_pt_gp(
+ struct se_subsystem_dev *su_dev,
+ const char *name,
+ int def_group)
+{
+ struct t10_alua_tg_pt_gp *tg_pt_gp;
+
+ tg_pt_gp = kmem_cache_zalloc(t10_alua_tg_pt_gp_cache, GFP_KERNEL);
+ if (!(tg_pt_gp)) {
+ printk(KERN_ERR "Unable to allocate struct t10_alua_tg_pt_gp\n");
+ return NULL;
+ }
+ INIT_LIST_HEAD(&tg_pt_gp->tg_pt_gp_list);
+ INIT_LIST_HEAD(&tg_pt_gp->tg_pt_gp_mem_list);
+ mutex_init(&tg_pt_gp->tg_pt_gp_md_mutex);
+ spin_lock_init(&tg_pt_gp->tg_pt_gp_lock);
+ atomic_set(&tg_pt_gp->tg_pt_gp_ref_cnt, 0);
+ tg_pt_gp->tg_pt_gp_su_dev = su_dev;
+ tg_pt_gp->tg_pt_gp_md_buf_len = ALUA_MD_BUF_LEN;
+ atomic_set(&tg_pt_gp->tg_pt_gp_alua_access_state,
+ ALUA_ACCESS_STATE_ACTIVE_OPTMIZED);
+ /*
+ * Enable both explict and implict ALUA support by default
+ */
+ tg_pt_gp->tg_pt_gp_alua_access_type =
+ TPGS_EXPLICT_ALUA | TPGS_IMPLICT_ALUA;
+ /*
+ * Set the default Active/NonOptimized Delay in milliseconds
+ */
+ tg_pt_gp->tg_pt_gp_nonop_delay_msecs = ALUA_DEFAULT_NONOP_DELAY_MSECS;
+ tg_pt_gp->tg_pt_gp_trans_delay_msecs = ALUA_DEFAULT_TRANS_DELAY_MSECS;
+
+ if (def_group) {
+ spin_lock(&T10_ALUA(su_dev)->tg_pt_gps_lock);
+ tg_pt_gp->tg_pt_gp_id =
+ T10_ALUA(su_dev)->alua_tg_pt_gps_counter++;
+ tg_pt_gp->tg_pt_gp_valid_id = 1;
+ T10_ALUA(su_dev)->alua_tg_pt_gps_count++;
+ list_add_tail(&tg_pt_gp->tg_pt_gp_list,
+ &T10_ALUA(su_dev)->tg_pt_gps_list);
+ spin_unlock(&T10_ALUA(su_dev)->tg_pt_gps_lock);
+ }
+
+ return tg_pt_gp;
+}
+
+int core_alua_set_tg_pt_gp_id(
+ struct t10_alua_tg_pt_gp *tg_pt_gp,
+ u16 tg_pt_gp_id)
+{
+ struct se_subsystem_dev *su_dev = tg_pt_gp->tg_pt_gp_su_dev;
+ struct t10_alua_tg_pt_gp *tg_pt_gp_tmp;
+ u16 tg_pt_gp_id_tmp;
+ /*
+ * The tg_pt_gp->tg_pt_gp_id may only be set once..
+ */
+ if (tg_pt_gp->tg_pt_gp_valid_id) {
+ printk(KERN_WARNING "ALUA TG PT Group already has a valid ID,"
+ " ignoring request\n");
+ return -1;
+ }
+
+ spin_lock(&T10_ALUA(su_dev)->tg_pt_gps_lock);
+ if (T10_ALUA(su_dev)->alua_tg_pt_gps_count == 0x0000ffff) {
+ printk(KERN_ERR "Maximum ALUA alua_tg_pt_gps_count:"
+ " 0x0000ffff reached\n");
+ spin_unlock(&T10_ALUA(su_dev)->tg_pt_gps_lock);
+ kmem_cache_free(t10_alua_tg_pt_gp_cache, tg_pt_gp);
+ return -1;
+ }
+again:
+ tg_pt_gp_id_tmp = (tg_pt_gp_id != 0) ? tg_pt_gp_id :
+ T10_ALUA(su_dev)->alua_tg_pt_gps_counter++;
+
+ list_for_each_entry(tg_pt_gp_tmp, &T10_ALUA(su_dev)->tg_pt_gps_list,
+ tg_pt_gp_list) {
+ if (tg_pt_gp_tmp->tg_pt_gp_id == tg_pt_gp_id_tmp) {
+ if (!(tg_pt_gp_id))
+ goto again;
+
+ printk(KERN_ERR "ALUA Target Port Group ID: %hu already"
+ " exists, ignoring request\n", tg_pt_gp_id);
+ spin_unlock(&T10_ALUA(su_dev)->tg_pt_gps_lock);
+ return -1;
+ }
+ }
+
+ tg_pt_gp->tg_pt_gp_id = tg_pt_gp_id_tmp;
+ tg_pt_gp->tg_pt_gp_valid_id = 1;
+ list_add_tail(&tg_pt_gp->tg_pt_gp_list,
+ &T10_ALUA(su_dev)->tg_pt_gps_list);
+ T10_ALUA(su_dev)->alua_tg_pt_gps_count++;
+ spin_unlock(&T10_ALUA(su_dev)->tg_pt_gps_lock);
+
+ return 0;
+}
+
+struct t10_alua_tg_pt_gp_member *core_alua_allocate_tg_pt_gp_mem(
+ struct se_port *port)
+{
+ struct t10_alua_tg_pt_gp_member *tg_pt_gp_mem;
+
+ tg_pt_gp_mem = kmem_cache_zalloc(t10_alua_tg_pt_gp_mem_cache,
+ GFP_KERNEL);
+ if (!(tg_pt_gp_mem)) {
+ printk(KERN_ERR "Unable to allocate struct t10_alua_tg_pt_gp_member\n");
+ return ERR_PTR(-ENOMEM);
+ }
+ INIT_LIST_HEAD(&tg_pt_gp_mem->tg_pt_gp_mem_list);
+ spin_lock_init(&tg_pt_gp_mem->tg_pt_gp_mem_lock);
+ atomic_set(&tg_pt_gp_mem->tg_pt_gp_mem_ref_cnt, 0);
+
+ tg_pt_gp_mem->tg_pt = port;
+ port->sep_alua_tg_pt_gp_mem = tg_pt_gp_mem;
+ atomic_set(&port->sep_tg_pt_gp_active, 1);
+
+ return tg_pt_gp_mem;
+}
+
+void core_alua_free_tg_pt_gp(
+ struct t10_alua_tg_pt_gp *tg_pt_gp)
+{
+ struct se_subsystem_dev *su_dev = tg_pt_gp->tg_pt_gp_su_dev;
+ struct t10_alua_tg_pt_gp_member *tg_pt_gp_mem, *tg_pt_gp_mem_tmp;
+ /*
+ * Once we have reached this point, config_item_put() has already
+ * been called from target_core_alua_drop_tg_pt_gp().
+ *
+ * Here we remove *tg_pt_gp from the global list so that
+ * no assications *OR* explict ALUA via SET_TARGET_PORT_GROUPS
+ * can be made while we are releasing struct t10_alua_tg_pt_gp.
+ */
+ spin_lock(&T10_ALUA(su_dev)->tg_pt_gps_lock);
+ list_del(&tg_pt_gp->tg_pt_gp_list);
+ T10_ALUA(su_dev)->alua_tg_pt_gps_counter--;
+ spin_unlock(&T10_ALUA(su_dev)->tg_pt_gps_lock);
+ /*
+ * Allow a struct t10_alua_tg_pt_gp_member * referenced by
+ * core_alua_get_tg_pt_gp_by_name() in
+ * target_core_configfs.c:target_core_store_alua_tg_pt_gp()
+ * to be released with core_alua_put_tg_pt_gp_from_name().
+ */
+ while (atomic_read(&tg_pt_gp->tg_pt_gp_ref_cnt))
+ cpu_relax();
+ /*
+ * Release reference to struct t10_alua_tg_pt_gp from all associated
+ * struct se_port.
+ */
+ spin_lock(&tg_pt_gp->tg_pt_gp_lock);
+ list_for_each_entry_safe(tg_pt_gp_mem, tg_pt_gp_mem_tmp,
+ &tg_pt_gp->tg_pt_gp_mem_list, tg_pt_gp_mem_list) {
+ if (tg_pt_gp_mem->tg_pt_gp_assoc) {
+ list_del(&tg_pt_gp_mem->tg_pt_gp_mem_list);
+ tg_pt_gp->tg_pt_gp_members--;
+ tg_pt_gp_mem->tg_pt_gp_assoc = 0;
+ }
+ spin_unlock(&tg_pt_gp->tg_pt_gp_lock);
+ /*
+ * tg_pt_gp_mem is assoicated with a single
+ * se_port->sep_alua_tg_pt_gp_mem, and is released via
+ * core_alua_free_tg_pt_gp_mem().
+ *
+ * If the passed tg_pt_gp does NOT match the default_tg_pt_gp,
+ * assume we want to re-assocate a given tg_pt_gp_mem with
+ * default_tg_pt_gp.
+ */
+ spin_lock(&tg_pt_gp_mem->tg_pt_gp_mem_lock);
+ if (tg_pt_gp != T10_ALUA(su_dev)->default_tg_pt_gp) {
+ __core_alua_attach_tg_pt_gp_mem(tg_pt_gp_mem,
+ T10_ALUA(su_dev)->default_tg_pt_gp);
+ } else
+ tg_pt_gp_mem->tg_pt_gp = NULL;
+ spin_unlock(&tg_pt_gp_mem->tg_pt_gp_mem_lock);
+
+ spin_lock(&tg_pt_gp->tg_pt_gp_lock);
+ }
+ spin_unlock(&tg_pt_gp->tg_pt_gp_lock);
+
+ kmem_cache_free(t10_alua_tg_pt_gp_cache, tg_pt_gp);
+}
+
+void core_alua_free_tg_pt_gp_mem(struct se_port *port)
+{
+ struct se_subsystem_dev *su_dev = port->sep_lun->lun_se_dev->se_sub_dev;
+ struct t10_alua *alua = T10_ALUA(su_dev);
+ struct t10_alua_tg_pt_gp *tg_pt_gp;
+ struct t10_alua_tg_pt_gp_member *tg_pt_gp_mem;
+
+ if (alua->alua_type != SPC3_ALUA_EMULATED)
+ return;
+
+ tg_pt_gp_mem = port->sep_alua_tg_pt_gp_mem;
+ if (!(tg_pt_gp_mem))
+ return;
+
+ while (atomic_read(&tg_pt_gp_mem->tg_pt_gp_mem_ref_cnt))
+ cpu_relax();
+
+ spin_lock(&tg_pt_gp_mem->tg_pt_gp_mem_lock);
+ tg_pt_gp = tg_pt_gp_mem->tg_pt_gp;
+ if ((tg_pt_gp)) {
+ spin_lock(&tg_pt_gp->tg_pt_gp_lock);
+ if (tg_pt_gp_mem->tg_pt_gp_assoc) {
+ list_del(&tg_pt_gp_mem->tg_pt_gp_mem_list);
+ tg_pt_gp->tg_pt_gp_members--;
+ tg_pt_gp_mem->tg_pt_gp_assoc = 0;
+ }
+ spin_unlock(&tg_pt_gp->tg_pt_gp_lock);
+ tg_pt_gp_mem->tg_pt_gp = NULL;
+ }
+ spin_unlock(&tg_pt_gp_mem->tg_pt_gp_mem_lock);
+
+ kmem_cache_free(t10_alua_tg_pt_gp_mem_cache, tg_pt_gp_mem);
+}
+
+static struct t10_alua_tg_pt_gp *core_alua_get_tg_pt_gp_by_name(
+ struct se_subsystem_dev *su_dev,
+ const char *name)
+{
+ struct t10_alua_tg_pt_gp *tg_pt_gp;
+ struct config_item *ci;
+
+ spin_lock(&T10_ALUA(su_dev)->tg_pt_gps_lock);
+ list_for_each_entry(tg_pt_gp, &T10_ALUA(su_dev)->tg_pt_gps_list,
+ tg_pt_gp_list) {
+ if (!(tg_pt_gp->tg_pt_gp_valid_id))
+ continue;
+ ci = &tg_pt_gp->tg_pt_gp_group.cg_item;
+ if (!(strcmp(config_item_name(ci), name))) {
+ atomic_inc(&tg_pt_gp->tg_pt_gp_ref_cnt);
+ spin_unlock(&T10_ALUA(su_dev)->tg_pt_gps_lock);
+ return tg_pt_gp;
+ }
+ }
+ spin_unlock(&T10_ALUA(su_dev)->tg_pt_gps_lock);
+
+ return NULL;
+}
+
+static void core_alua_put_tg_pt_gp_from_name(
+ struct t10_alua_tg_pt_gp *tg_pt_gp)
+{
+ struct se_subsystem_dev *su_dev = tg_pt_gp->tg_pt_gp_su_dev;
+
+ spin_lock(&T10_ALUA(su_dev)->tg_pt_gps_lock);
+ atomic_dec(&tg_pt_gp->tg_pt_gp_ref_cnt);
+ spin_unlock(&T10_ALUA(su_dev)->tg_pt_gps_lock);
+}
+
+/*
+ * Called with struct t10_alua_tg_pt_gp_member->tg_pt_gp_mem_lock held
+ */
+void __core_alua_attach_tg_pt_gp_mem(
+ struct t10_alua_tg_pt_gp_member *tg_pt_gp_mem,
+ struct t10_alua_tg_pt_gp *tg_pt_gp)
+{
+ spin_lock(&tg_pt_gp->tg_pt_gp_lock);
+ tg_pt_gp_mem->tg_pt_gp = tg_pt_gp;
+ tg_pt_gp_mem->tg_pt_gp_assoc = 1;
+ list_add_tail(&tg_pt_gp_mem->tg_pt_gp_mem_list,
+ &tg_pt_gp->tg_pt_gp_mem_list);
+ tg_pt_gp->tg_pt_gp_members++;
+ spin_unlock(&tg_pt_gp->tg_pt_gp_lock);
+}
+
+/*
+ * Called with struct t10_alua_tg_pt_gp_member->tg_pt_gp_mem_lock held
+ */
+static void __core_alua_drop_tg_pt_gp_mem(
+ struct t10_alua_tg_pt_gp_member *tg_pt_gp_mem,
+ struct t10_alua_tg_pt_gp *tg_pt_gp)
+{
+ spin_lock(&tg_pt_gp->tg_pt_gp_lock);
+ list_del(&tg_pt_gp_mem->tg_pt_gp_mem_list);
+ tg_pt_gp_mem->tg_pt_gp = NULL;
+ tg_pt_gp_mem->tg_pt_gp_assoc = 0;
+ tg_pt_gp->tg_pt_gp_members--;
+ spin_unlock(&tg_pt_gp->tg_pt_gp_lock);
+}
+
+ssize_t core_alua_show_tg_pt_gp_info(struct se_port *port, char *page)
+{
+ struct se_subsystem_dev *su_dev = port->sep_lun->lun_se_dev->se_sub_dev;
+ struct config_item *tg_pt_ci;
+ struct t10_alua *alua = T10_ALUA(su_dev);
+ struct t10_alua_tg_pt_gp *tg_pt_gp;
+ struct t10_alua_tg_pt_gp_member *tg_pt_gp_mem;
+ ssize_t len = 0;
+
+ if (alua->alua_type != SPC3_ALUA_EMULATED)
+ return len;
+
+ tg_pt_gp_mem = port->sep_alua_tg_pt_gp_mem;
+ if (!(tg_pt_gp_mem))
+ return len;
+
+ spin_lock(&tg_pt_gp_mem->tg_pt_gp_mem_lock);
+ tg_pt_gp = tg_pt_gp_mem->tg_pt_gp;
+ if ((tg_pt_gp)) {
+ tg_pt_ci = &tg_pt_gp->tg_pt_gp_group.cg_item;
+ len += sprintf(page, "TG Port Alias: %s\nTG Port Group ID:"
+ " %hu\nTG Port Primary Access State: %s\nTG Port "
+ "Primary Access Status: %s\nTG Port Secondary Access"
+ " State: %s\nTG Port Secondary Access Status: %s\n",
+ config_item_name(tg_pt_ci), tg_pt_gp->tg_pt_gp_id,
+ core_alua_dump_state(atomic_read(
+ &tg_pt_gp->tg_pt_gp_alua_access_state)),
+ core_alua_dump_status(
+ tg_pt_gp->tg_pt_gp_alua_access_status),
+ (atomic_read(&port->sep_tg_pt_secondary_offline)) ?
+ "Offline" : "None",
+ core_alua_dump_status(port->sep_tg_pt_secondary_stat));
+ }
+ spin_unlock(&tg_pt_gp_mem->tg_pt_gp_mem_lock);
+
+ return len;
+}
+
+ssize_t core_alua_store_tg_pt_gp_info(
+ struct se_port *port,
+ const char *page,
+ size_t count)
+{
+ struct se_portal_group *tpg;
+ struct se_lun *lun;
+ struct se_subsystem_dev *su_dev = port->sep_lun->lun_se_dev->se_sub_dev;
+ struct t10_alua_tg_pt_gp *tg_pt_gp = NULL, *tg_pt_gp_new = NULL;
+ struct t10_alua_tg_pt_gp_member *tg_pt_gp_mem;
+ unsigned char buf[TG_PT_GROUP_NAME_BUF];
+ int move = 0;
+
+ tpg = port->sep_tpg;
+ lun = port->sep_lun;
+
+ if (T10_ALUA(su_dev)->alua_type != SPC3_ALUA_EMULATED) {
+ printk(KERN_WARNING "SPC3_ALUA_EMULATED not enabled for"
+ " %s/tpgt_%hu/%s\n", TPG_TFO(tpg)->tpg_get_wwn(tpg),
+ TPG_TFO(tpg)->tpg_get_tag(tpg),
+ config_item_name(&lun->lun_group.cg_item));
+ return -EINVAL;
+ }
+
+ if (count > TG_PT_GROUP_NAME_BUF) {
+ printk(KERN_ERR "ALUA Target Port Group alias too large!\n");
+ return -EINVAL;
+ }
+ memset(buf, 0, TG_PT_GROUP_NAME_BUF);
+ memcpy(buf, page, count);
+ /*
+ * Any ALUA target port group alias besides "NULL" means we will be
+ * making a new group association.
+ */
+ if (strcmp(strstrip(buf), "NULL")) {
+ /*
+ * core_alua_get_tg_pt_gp_by_name() will increment reference to
+ * struct t10_alua_tg_pt_gp. This reference is released with
+ * core_alua_put_tg_pt_gp_from_name() below.
+ */
+ tg_pt_gp_new = core_alua_get_tg_pt_gp_by_name(su_dev,
+ strstrip(buf));
+ if (!(tg_pt_gp_new))
+ return -ENODEV;
+ }
+ tg_pt_gp_mem = port->sep_alua_tg_pt_gp_mem;
+ if (!(tg_pt_gp_mem)) {
+ if (tg_pt_gp_new)
+ core_alua_put_tg_pt_gp_from_name(tg_pt_gp_new);
+ printk(KERN_ERR "NULL struct se_port->sep_alua_tg_pt_gp_mem pointer\n");
+ return -EINVAL;
+ }
+
+ spin_lock(&tg_pt_gp_mem->tg_pt_gp_mem_lock);
+ tg_pt_gp = tg_pt_gp_mem->tg_pt_gp;
+ if ((tg_pt_gp)) {
+ /*
+ * Clearing an existing tg_pt_gp association, and replacing
+ * with the default_tg_pt_gp.
+ */
+ if (!(tg_pt_gp_new)) {
+ printk(KERN_INFO "Target_Core_ConfigFS: Moving"
+ " %s/tpgt_%hu/%s from ALUA Target Port Group:"
+ " alua/%s, ID: %hu back to"
+ " default_tg_pt_gp\n",
+ TPG_TFO(tpg)->tpg_get_wwn(tpg),
+ TPG_TFO(tpg)->tpg_get_tag(tpg),
+ config_item_name(&lun->lun_group.cg_item),
+ config_item_name(
+ &tg_pt_gp->tg_pt_gp_group.cg_item),
+ tg_pt_gp->tg_pt_gp_id);
+
+ __core_alua_drop_tg_pt_gp_mem(tg_pt_gp_mem, tg_pt_gp);
+ __core_alua_attach_tg_pt_gp_mem(tg_pt_gp_mem,
+ T10_ALUA(su_dev)->default_tg_pt_gp);
+ spin_unlock(&tg_pt_gp_mem->tg_pt_gp_mem_lock);
+
+ return count;
+ }
+ /*
+ * Removing existing association of tg_pt_gp_mem with tg_pt_gp
+ */
+ __core_alua_drop_tg_pt_gp_mem(tg_pt_gp_mem, tg_pt_gp);
+ move = 1;
+ }
+ /*
+ * Associate tg_pt_gp_mem with tg_pt_gp_new.
+ */
+ __core_alua_attach_tg_pt_gp_mem(tg_pt_gp_mem, tg_pt_gp_new);
+ spin_unlock(&tg_pt_gp_mem->tg_pt_gp_mem_lock);
+ printk(KERN_INFO "Target_Core_ConfigFS: %s %s/tpgt_%hu/%s to ALUA"
+ " Target Port Group: alua/%s, ID: %hu\n", (move) ?
+ "Moving" : "Adding", TPG_TFO(tpg)->tpg_get_wwn(tpg),
+ TPG_TFO(tpg)->tpg_get_tag(tpg),
+ config_item_name(&lun->lun_group.cg_item),
+ config_item_name(&tg_pt_gp_new->tg_pt_gp_group.cg_item),
+ tg_pt_gp_new->tg_pt_gp_id);
+
+ core_alua_put_tg_pt_gp_from_name(tg_pt_gp_new);
+ return count;
+}
+
+ssize_t core_alua_show_access_type(
+ struct t10_alua_tg_pt_gp *tg_pt_gp,
+ char *page)
+{
+ if ((tg_pt_gp->tg_pt_gp_alua_access_type & TPGS_EXPLICT_ALUA) &&
+ (tg_pt_gp->tg_pt_gp_alua_access_type & TPGS_IMPLICT_ALUA))
+ return sprintf(page, "Implict and Explict\n");
+ else if (tg_pt_gp->tg_pt_gp_alua_access_type & TPGS_IMPLICT_ALUA)
+ return sprintf(page, "Implict\n");
+ else if (tg_pt_gp->tg_pt_gp_alua_access_type & TPGS_EXPLICT_ALUA)
+ return sprintf(page, "Explict\n");
+ else
+ return sprintf(page, "None\n");
+}
+
+ssize_t core_alua_store_access_type(
+ struct t10_alua_tg_pt_gp *tg_pt_gp,
+ const char *page,
+ size_t count)
+{
+ unsigned long tmp;
+ int ret;
+
+ ret = strict_strtoul(page, 0, &tmp);
+ if (ret < 0) {
+ printk(KERN_ERR "Unable to extract alua_access_type\n");
+ return -EINVAL;
+ }
+ if ((tmp != 0) && (tmp != 1) && (tmp != 2) && (tmp != 3)) {
+ printk(KERN_ERR "Illegal value for alua_access_type:"
+ " %lu\n", tmp);
+ return -EINVAL;
+ }
+ if (tmp == 3)
+ tg_pt_gp->tg_pt_gp_alua_access_type =
+ TPGS_IMPLICT_ALUA | TPGS_EXPLICT_ALUA;
+ else if (tmp == 2)
+ tg_pt_gp->tg_pt_gp_alua_access_type = TPGS_EXPLICT_ALUA;
+ else if (tmp == 1)
+ tg_pt_gp->tg_pt_gp_alua_access_type = TPGS_IMPLICT_ALUA;
+ else
+ tg_pt_gp->tg_pt_gp_alua_access_type = 0;
+
+ return count;
+}
+
+ssize_t core_alua_show_nonop_delay_msecs(
+ struct t10_alua_tg_pt_gp *tg_pt_gp,
+ char *page)
+{
+ return sprintf(page, "%d\n", tg_pt_gp->tg_pt_gp_nonop_delay_msecs);
+}
+
+ssize_t core_alua_store_nonop_delay_msecs(
+ struct t10_alua_tg_pt_gp *tg_pt_gp,
+ const char *page,
+ size_t count)
+{
+ unsigned long tmp;
+ int ret;
+
+ ret = strict_strtoul(page, 0, &tmp);
+ if (ret < 0) {
+ printk(KERN_ERR "Unable to extract nonop_delay_msecs\n");
+ return -EINVAL;
+ }
+ if (tmp > ALUA_MAX_NONOP_DELAY_MSECS) {
+ printk(KERN_ERR "Passed nonop_delay_msecs: %lu, exceeds"
+ " ALUA_MAX_NONOP_DELAY_MSECS: %d\n", tmp,
+ ALUA_MAX_NONOP_DELAY_MSECS);
+ return -EINVAL;
+ }
+ tg_pt_gp->tg_pt_gp_nonop_delay_msecs = (int)tmp;
+
+ return count;
+}
+
+ssize_t core_alua_show_trans_delay_msecs(
+ struct t10_alua_tg_pt_gp *tg_pt_gp,
+ char *page)
+{
+ return sprintf(page, "%d\n", tg_pt_gp->tg_pt_gp_trans_delay_msecs);
+}
+
+ssize_t core_alua_store_trans_delay_msecs(
+ struct t10_alua_tg_pt_gp *tg_pt_gp,
+ const char *page,
+ size_t count)
+{
+ unsigned long tmp;
+ int ret;
+
+ ret = strict_strtoul(page, 0, &tmp);
+ if (ret < 0) {
+ printk(KERN_ERR "Unable to extract trans_delay_msecs\n");
+ return -EINVAL;
+ }
+ if (tmp > ALUA_MAX_TRANS_DELAY_MSECS) {
+ printk(KERN_ERR "Passed trans_delay_msecs: %lu, exceeds"
+ " ALUA_MAX_TRANS_DELAY_MSECS: %d\n", tmp,
+ ALUA_MAX_TRANS_DELAY_MSECS);
+ return -EINVAL;
+ }
+ tg_pt_gp->tg_pt_gp_trans_delay_msecs = (int)tmp;
+
+ return count;
+}
+
+ssize_t core_alua_show_preferred_bit(
+ struct t10_alua_tg_pt_gp *tg_pt_gp,
+ char *page)
+{
+ return sprintf(page, "%d\n", tg_pt_gp->tg_pt_gp_pref);
+}
+
+ssize_t core_alua_store_preferred_bit(
+ struct t10_alua_tg_pt_gp *tg_pt_gp,
+ const char *page,
+ size_t count)
+{
+ unsigned long tmp;
+ int ret;
+
+ ret = strict_strtoul(page, 0, &tmp);
+ if (ret < 0) {
+ printk(KERN_ERR "Unable to extract preferred ALUA value\n");
+ return -EINVAL;
+ }
+ if ((tmp != 0) && (tmp != 1)) {
+ printk(KERN_ERR "Illegal value for preferred ALUA: %lu\n", tmp);
+ return -EINVAL;
+ }
+ tg_pt_gp->tg_pt_gp_pref = (int)tmp;
+
+ return count;
+}
+
+ssize_t core_alua_show_offline_bit(struct se_lun *lun, char *page)
+{
+ if (!(lun->lun_sep))
+ return -ENODEV;
+
+ return sprintf(page, "%d\n",
+ atomic_read(&lun->lun_sep->sep_tg_pt_secondary_offline));
+}
+
+ssize_t core_alua_store_offline_bit(
+ struct se_lun *lun,
+ const char *page,
+ size_t count)
+{
+ struct t10_alua_tg_pt_gp_member *tg_pt_gp_mem;
+ unsigned long tmp;
+ int ret;
+
+ if (!(lun->lun_sep))
+ return -ENODEV;
+
+ ret = strict_strtoul(page, 0, &tmp);
+ if (ret < 0) {
+ printk(KERN_ERR "Unable to extract alua_tg_pt_offline value\n");
+ return -EINVAL;
+ }
+ if ((tmp != 0) && (tmp != 1)) {
+ printk(KERN_ERR "Illegal value for alua_tg_pt_offline: %lu\n",
+ tmp);
+ return -EINVAL;
+ }
+ tg_pt_gp_mem = lun->lun_sep->sep_alua_tg_pt_gp_mem;
+ if (!(tg_pt_gp_mem)) {
+ printk(KERN_ERR "Unable to locate *tg_pt_gp_mem\n");
+ return -EINVAL;
+ }
+
+ ret = core_alua_set_tg_pt_secondary_state(tg_pt_gp_mem,
+ lun->lun_sep, 0, (int)tmp);
+ if (ret < 0)
+ return -EINVAL;
+
+ return count;
+}
+
+ssize_t core_alua_show_secondary_status(
+ struct se_lun *lun,
+ char *page)
+{
+ return sprintf(page, "%d\n", lun->lun_sep->sep_tg_pt_secondary_stat);
+}
+
+ssize_t core_alua_store_secondary_status(
+ struct se_lun *lun,
+ const char *page,
+ size_t count)
+{
+ unsigned long tmp;
+ int ret;
+
+ ret = strict_strtoul(page, 0, &tmp);
+ if (ret < 0) {
+ printk(KERN_ERR "Unable to extract alua_tg_pt_status\n");
+ return -EINVAL;
+ }
+ if ((tmp != ALUA_STATUS_NONE) &&
+ (tmp != ALUA_STATUS_ALTERED_BY_EXPLICT_STPG) &&
+ (tmp != ALUA_STATUS_ALTERED_BY_IMPLICT_ALUA)) {
+ printk(KERN_ERR "Illegal value for alua_tg_pt_status: %lu\n",
+ tmp);
+ return -EINVAL;
+ }
+ lun->lun_sep->sep_tg_pt_secondary_stat = (int)tmp;
+
+ return count;
+}
+
+ssize_t core_alua_show_secondary_write_metadata(
+ struct se_lun *lun,
+ char *page)
+{
+ return sprintf(page, "%d\n",
+ lun->lun_sep->sep_tg_pt_secondary_write_md);
+}
+
+ssize_t core_alua_store_secondary_write_metadata(
+ struct se_lun *lun,
+ const char *page,
+ size_t count)
+{
+ unsigned long tmp;
+ int ret;
+
+ ret = strict_strtoul(page, 0, &tmp);
+ if (ret < 0) {
+ printk(KERN_ERR "Unable to extract alua_tg_pt_write_md\n");
+ return -EINVAL;
+ }
+ if ((tmp != 0) && (tmp != 1)) {
+ printk(KERN_ERR "Illegal value for alua_tg_pt_write_md:"
+ " %lu\n", tmp);
+ return -EINVAL;
+ }
+ lun->lun_sep->sep_tg_pt_secondary_write_md = (int)tmp;
+
+ return count;
+}
+
+int core_setup_alua(struct se_device *dev, int force_pt)
+{
+ struct se_subsystem_dev *su_dev = dev->se_sub_dev;
+ struct t10_alua *alua = T10_ALUA(su_dev);
+ struct t10_alua_lu_gp_member *lu_gp_mem;
+ /*
+ * If this device is from Target_Core_Mod/pSCSI, use the ALUA logic
+ * of the Underlying SCSI hardware. In Linux/SCSI terms, this can
+ * cause a problem because libata and some SATA RAID HBAs appear
+ * under Linux/SCSI, but emulate SCSI logic themselves.
+ */
+ if (((TRANSPORT(dev)->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV) &&
+ !(DEV_ATTRIB(dev)->emulate_alua)) || force_pt) {
+ alua->alua_type = SPC_ALUA_PASSTHROUGH;
+ alua->alua_state_check = &core_alua_state_check_nop;
+ printk(KERN_INFO "%s: Using SPC_ALUA_PASSTHROUGH, no ALUA"
+ " emulation\n", TRANSPORT(dev)->name);
+ return 0;
+ }
+ /*
+ * If SPC-3 or above is reported by real or emulated struct se_device,
+ * use emulated ALUA.
+ */
+ if (TRANSPORT(dev)->get_device_rev(dev) >= SCSI_3) {
+ printk(KERN_INFO "%s: Enabling ALUA Emulation for SPC-3"
+ " device\n", TRANSPORT(dev)->name);
+ /*
+ * Assoicate this struct se_device with the default ALUA
+ * LUN Group.
+ */
+ lu_gp_mem = core_alua_allocate_lu_gp_mem(dev);
+ if (IS_ERR(lu_gp_mem) || !lu_gp_mem)
+ return -1;
+
+ alua->alua_type = SPC3_ALUA_EMULATED;
+ alua->alua_state_check = &core_alua_state_check;
+ spin_lock(&lu_gp_mem->lu_gp_mem_lock);
+ __core_alua_attach_lu_gp_mem(lu_gp_mem,
+ se_global->default_lu_gp);
+ spin_unlock(&lu_gp_mem->lu_gp_mem_lock);
+
+ printk(KERN_INFO "%s: Adding to default ALUA LU Group:"
+ " core/alua/lu_gps/default_lu_gp\n",
+ TRANSPORT(dev)->name);
+ } else {
+ alua->alua_type = SPC2_ALUA_DISABLED;
+ alua->alua_state_check = &core_alua_state_check_nop;
+ printk(KERN_INFO "%s: Disabling ALUA Emulation for SPC-2"
+ " device\n", TRANSPORT(dev)->name);
+ }
+
+ return 0;
+}
diff --git a/drivers/target/target_core_alua.h b/drivers/target/target_core_alua.h
new file mode 100644
index 0000000..c86f97a
--- /dev/null
+++ b/drivers/target/target_core_alua.h
@@ -0,0 +1,126 @@
+#ifndef TARGET_CORE_ALUA_H
+#define TARGET_CORE_ALUA_H
+
+/*
+ * INQUIRY response data, TPGS Field
+ *
+ * from spc4r17 section 6.4.2 Table 135
+ */
+#define TPGS_NO_ALUA 0x00
+#define TPGS_IMPLICT_ALUA 0x10
+#define TPGS_EXPLICT_ALUA 0x20
+
+/*
+ * ASYMMETRIC ACCESS STATE field
+ *
+ * from spc4r17 section 6.27 Table 245
+ */
+#define ALUA_ACCESS_STATE_ACTIVE_OPTMIZED 0x0
+#define ALUA_ACCESS_STATE_ACTIVE_NON_OPTIMIZED 0x1
+#define ALUA_ACCESS_STATE_STANDBY 0x2
+#define ALUA_ACCESS_STATE_UNAVAILABLE 0x3
+#define ALUA_ACCESS_STATE_OFFLINE 0xe
+#define ALUA_ACCESS_STATE_TRANSITION 0xf
+
+/*
+ * REPORT_TARGET_PORT_GROUP STATUS CODE
+ *
+ * from spc4r17 section 6.27 Table 246
+ */
+#define ALUA_STATUS_NONE 0x00
+#define ALUA_STATUS_ALTERED_BY_EXPLICT_STPG 0x01
+#define ALUA_STATUS_ALTERED_BY_IMPLICT_ALUA 0x02
+
+/*
+ * From spc4r17, Table D.1: ASC and ASCQ Assignement
+ */
+#define ASCQ_04H_ALUA_STATE_TRANSITION 0x0a
+#define ASCQ_04H_ALUA_TG_PT_STANDBY 0x0b
+#define ASCQ_04H_ALUA_TG_PT_UNAVAILABLE 0x0c
+#define ASCQ_04H_ALUA_OFFLINE 0x12
+
+/*
+ * Used as the default for Active/NonOptimized delay (in milliseconds)
+ * This can also be changed via configfs on a per target port group basis..
+ */
+#define ALUA_DEFAULT_NONOP_DELAY_MSECS 100
+#define ALUA_MAX_NONOP_DELAY_MSECS 10000 /* 10 seconds */
+/*
+ * Used for implict and explict ALUA transitional delay, that is disabled
+ * by default, and is intended to be used for debugging client side ALUA code.
+ */
+#define ALUA_DEFAULT_TRANS_DELAY_MSECS 0
+#define ALUA_MAX_TRANS_DELAY_MSECS 30000 /* 30 seconds */
+/*
+ * Used by core_alua_update_tpg_primary_metadata() and
+ * core_alua_update_tpg_secondary_metadata()
+ */
+#define ALUA_METADATA_PATH_LEN 512
+/*
+ * Used by core_alua_update_tpg_secondary_metadata()
+ */
+#define ALUA_SECONDARY_METADATA_WWN_LEN 256
+
+extern struct kmem_cache *t10_alua_lu_gp_cache;
+extern struct kmem_cache *t10_alua_lu_gp_mem_cache;
+extern struct kmem_cache *t10_alua_tg_pt_gp_cache;
+extern struct kmem_cache *t10_alua_tg_pt_gp_mem_cache;
+
+extern int core_emulate_report_target_port_groups(struct se_cmd *);
+extern int core_emulate_set_target_port_groups(struct se_cmd *);
+extern int core_alua_check_nonop_delay(struct se_cmd *);
+extern int core_alua_do_port_transition(struct t10_alua_tg_pt_gp *,
+ struct se_device *, struct se_port *,
+ struct se_node_acl *, int, int);
+extern char *core_alua_dump_status(int);
+extern struct t10_alua_lu_gp *core_alua_allocate_lu_gp(const char *, int);
+extern int core_alua_set_lu_gp_id(struct t10_alua_lu_gp *, u16);
+extern void core_alua_free_lu_gp(struct t10_alua_lu_gp *);
+extern void core_alua_free_lu_gp_mem(struct se_device *);
+extern struct t10_alua_lu_gp *core_alua_get_lu_gp_by_name(const char *);
+extern void core_alua_put_lu_gp_from_name(struct t10_alua_lu_gp *);
+extern void __core_alua_attach_lu_gp_mem(struct t10_alua_lu_gp_member *,
+ struct t10_alua_lu_gp *);
+extern void __core_alua_drop_lu_gp_mem(struct t10_alua_lu_gp_member *,
+ struct t10_alua_lu_gp *);
+extern void core_alua_drop_lu_gp_dev(struct se_device *);
+extern struct t10_alua_tg_pt_gp *core_alua_allocate_tg_pt_gp(
+ struct se_subsystem_dev *, const char *, int);
+extern int core_alua_set_tg_pt_gp_id(struct t10_alua_tg_pt_gp *, u16);
+extern struct t10_alua_tg_pt_gp_member *core_alua_allocate_tg_pt_gp_mem(
+ struct se_port *);
+extern void core_alua_free_tg_pt_gp(struct t10_alua_tg_pt_gp *);
+extern void core_alua_free_tg_pt_gp_mem(struct se_port *);
+extern void __core_alua_attach_tg_pt_gp_mem(struct t10_alua_tg_pt_gp_member *,
+ struct t10_alua_tg_pt_gp *);
+extern ssize_t core_alua_show_tg_pt_gp_info(struct se_port *, char *);
+extern ssize_t core_alua_store_tg_pt_gp_info(struct se_port *, const char *,
+ size_t);
+extern ssize_t core_alua_show_access_type(struct t10_alua_tg_pt_gp *, char *);
+extern ssize_t core_alua_store_access_type(struct t10_alua_tg_pt_gp *,
+ const char *, size_t);
+extern ssize_t core_alua_show_nonop_delay_msecs(struct t10_alua_tg_pt_gp *,
+ char *);
+extern ssize_t core_alua_store_nonop_delay_msecs(struct t10_alua_tg_pt_gp *,
+ const char *, size_t);
+extern ssize_t core_alua_show_trans_delay_msecs(struct t10_alua_tg_pt_gp *,
+ char *);
+extern ssize_t core_alua_store_trans_delay_msecs(struct t10_alua_tg_pt_gp *,
+ const char *, size_t);
+extern ssize_t core_alua_show_preferred_bit(struct t10_alua_tg_pt_gp *,
+ char *);
+extern ssize_t core_alua_store_preferred_bit(struct t10_alua_tg_pt_gp *,
+ const char *, size_t);
+extern ssize_t core_alua_show_offline_bit(struct se_lun *, char *);
+extern ssize_t core_alua_store_offline_bit(struct se_lun *, const char *,
+ size_t);
+extern ssize_t core_alua_show_secondary_status(struct se_lun *, char *);
+extern ssize_t core_alua_store_secondary_status(struct se_lun *,
+ const char *, size_t);
+extern ssize_t core_alua_show_secondary_write_metadata(struct se_lun *,
+ char *);
+extern ssize_t core_alua_store_secondary_write_metadata(struct se_lun *,
+ const char *, size_t);
+extern int core_setup_alua(struct se_device *, int);
+
+#endif /* TARGET_CORE_ALUA_H */
--
1.7.3.4
^ permalink raw reply related [flat|nested] 22+ messages in thread* [PATCH v2 02d/03] target: Add ConfigFS subsystem backstore infrastructure
2010-12-17 21:11 [PATCH v2 00/03] target: Initial merge of v4.0.0-rc6 for .38 Nicholas A. Bellinger
` (3 preceding siblings ...)
2010-12-17 21:11 ` [PATCH v2 02c/03] target: Add SPC-4 explict and implict Asymmetric Logical Unit Access (ALUA) Nicholas A. Bellinger
@ 2010-12-17 21:11 ` Nicholas A. Bellinger
2010-12-17 21:11 ` [PATCH v2 02e/03] target: Add fabric and subsystem transport engine core Nicholas A. Bellinger
` (15 subsequent siblings)
20 siblings, 0 replies; 22+ messages in thread
From: Nicholas A. Bellinger @ 2010-12-17 21:11 UTC (permalink / raw)
To: linux-scsi, James Bottomley; +Cc: Nicholas Bellinger
From: Nicholas Bellinger <nab@linux-iscsi.org>
This patch adds the TCM/ConfigFS core HBA and device backstore infrastructre
objects in /sys/kernel/config/target/core. It includes wrappers to logic for
Persistent Reservations and ALUA, and supports Linux/SCSI, Linux/BLOCK, and Linux/FILEIO
backstores using TCM subsystem plugin API.
Signed-off-by: Nicholas A. Bellinger <nab@linux-iscsi.org>
---
drivers/target/target_core_configfs.c | 3231 +++++++++++++++++++++++++++++++++
include/target/target_core_configfs.h | 52 +
2 files changed, 3283 insertions(+), 0 deletions(-)
create mode 100644 drivers/target/target_core_configfs.c
create mode 100644 include/target/target_core_configfs.h
diff --git a/drivers/target/target_core_configfs.c b/drivers/target/target_core_configfs.c
new file mode 100644
index 0000000..18d15ff
--- /dev/null
+++ b/drivers/target/target_core_configfs.c
@@ -0,0 +1,3231 @@
+/*******************************************************************************
+ * Filename: target_core_configfs.c
+ *
+ * This file contains ConfigFS logic for the Generic Target Engine project.
+ *
+ * Copyright (c) 2008-2010 Rising Tide Systems
+ * Copyright (c) 2008-2010 Linux-iSCSI.org
+ *
+ * Nicholas A. Bellinger <nab@kernel.org>
+ *
+ * based on configfs Copyright (C) 2005 Oracle. All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ ****************************************************************************/
+
+#include <linux/module.h>
+#include <linux/moduleparam.h>
+#include <linux/version.h>
+#include <generated/utsrelease.h>
+#include <linux/utsname.h>
+#include <linux/init.h>
+#include <linux/fs.h>
+#include <linux/namei.h>
+#include <linux/slab.h>
+#include <linux/types.h>
+#include <linux/delay.h>
+#include <linux/unistd.h>
+#include <linux/string.h>
+#include <linux/parser.h>
+#include <linux/syscalls.h>
+#include <linux/configfs.h>
+#include <linux/proc_fs.h>
+
+#include <target/target_core_base.h>
+#include <target/target_core_device.h>
+#include <target/target_core_transport.h>
+#include <target/target_core_fabric_ops.h>
+#include <target/target_core_fabric_configfs.h>
+#include <target/target_core_configfs.h>
+#include <target/configfs_macros.h>
+
+#include "target_core_alua.h"
+#include "target_core_hba.h"
+#include "target_core_pr.h"
+#include "target_core_rd.h"
+
+static struct list_head g_tf_list;
+static struct mutex g_tf_lock;
+
+struct target_core_configfs_attribute {
+ struct configfs_attribute attr;
+ ssize_t (*show)(void *, char *);
+ ssize_t (*store)(void *, const char *, size_t);
+};
+
+static inline struct se_hba *
+item_to_hba(struct config_item *item)
+{
+ return container_of(to_config_group(item), struct se_hba, hba_group);
+}
+
+/*
+ * Attributes for /sys/kernel/config/target/
+ */
+static ssize_t target_core_attr_show(struct config_item *item,
+ struct configfs_attribute *attr,
+ char *page)
+{
+ return sprintf(page, "Target Engine Core ConfigFS Infrastructure %s"
+ " on %s/%s on "UTS_RELEASE"\n", TARGET_CORE_CONFIGFS_VERSION,
+ utsname()->sysname, utsname()->machine);
+}
+
+static struct configfs_item_operations target_core_fabric_item_ops = {
+ .show_attribute = target_core_attr_show,
+};
+
+static struct configfs_attribute target_core_item_attr_version = {
+ .ca_owner = THIS_MODULE,
+ .ca_name = "version",
+ .ca_mode = S_IRUGO,
+};
+
+static struct target_fabric_configfs *target_core_get_fabric(
+ const char *name)
+{
+ struct target_fabric_configfs *tf;
+
+ if (!(name))
+ return NULL;
+
+ mutex_lock(&g_tf_lock);
+ list_for_each_entry(tf, &g_tf_list, tf_list) {
+ if (!(strcmp(tf->tf_name, name))) {
+ atomic_inc(&tf->tf_access_cnt);
+ mutex_unlock(&g_tf_lock);
+ return tf;
+ }
+ }
+ mutex_unlock(&g_tf_lock);
+
+ return NULL;
+}
+
+/*
+ * Called from struct target_core_group_ops->make_group()
+ */
+static struct config_group *target_core_register_fabric(
+ struct config_group *group,
+ const char *name)
+{
+ struct config_group *fabric_cg;
+ struct target_fabric_configfs *tf;
+ int ret;
+
+ printk(KERN_INFO "Target_Core_ConfigFS: REGISTER -> group: %p name:"
+ " %s\n", group, name);
+ /*
+ * Ensure that TCM subsystem plugins are loaded at this point for
+ * using the RAMDISK_DR virtual LUN 0 and all other struct se_port
+ * LUN symlinks.
+ */
+ if (transport_subsystem_check_init() < 0)
+ return ERR_PTR(-EINVAL);
+
+ fabric_cg = kzalloc(sizeof(struct config_group), GFP_KERNEL);
+ if (!(fabric_cg))
+ return ERR_PTR(-ENOMEM);
+ /*
+ * Below are some hardcoded request_module() calls to automatically
+ * local fabric modules when the following is called:
+ *
+ * mkdir -p /sys/kernel/config/target/$MODULE_NAME
+ *
+ * Note that this does not limit which TCM fabric module can be
+ * registered, but simply provids auto loading logic for modules with
+ * mkdir(2) system calls with known TCM fabric modules.
+ */
+ if (!(strncmp(name, "iscsi", 5))) {
+ /*
+ * Automatically load the LIO Target fabric module when the
+ * following is called:
+ *
+ * mkdir -p $CONFIGFS/target/iscsi
+ */
+ ret = request_module("iscsi_target_mod");
+ if (ret < 0) {
+ printk(KERN_ERR "request_module() failed for"
+ " iscsi_target_mod.ko: %d\n", ret);
+ kfree(fabric_cg);
+ return ERR_PTR(-EINVAL);
+ }
+ } else if (!(strncmp(name, "loopback", 8))) {
+ /*
+ * Automatically load the tcm_loop fabric module when the
+ * following is called:
+ *
+ * mkdir -p $CONFIGFS/target/loopback
+ */
+ ret = request_module("tcm_loop");
+ if (ret < 0) {
+ printk(KERN_ERR "request_module() failed for"
+ " tcm_loop.ko: %d\n", ret);
+ kfree(fabric_cg);
+ return ERR_PTR(-EINVAL);
+ }
+ }
+
+ tf = target_core_get_fabric(name);
+ if (!(tf)) {
+ printk(KERN_ERR "target_core_get_fabric() failed for %s\n",
+ name);
+ kfree(fabric_cg);
+ return ERR_PTR(-EINVAL);
+ }
+ printk(KERN_INFO "Target_Core_ConfigFS: REGISTER -> Located fabric:"
+ " %s\n", tf->tf_name);
+ /*
+ * On a successful target_core_get_fabric() look, the returned
+ * struct target_fabric_configfs *tf will contain a usage reference.
+ */
+ printk(KERN_INFO "Target_Core_ConfigFS: REGISTER tfc_wwn_cit -> %p\n",
+ &TF_CIT_TMPL(tf)->tfc_wwn_cit);
+
+ tf->tf_group.default_groups = tf->tf_default_groups;
+ tf->tf_group.default_groups[0] = &tf->tf_disc_group;
+ tf->tf_group.default_groups[1] = NULL;
+
+ config_group_init_type_name(&tf->tf_group, name,
+ &TF_CIT_TMPL(tf)->tfc_wwn_cit);
+ config_group_init_type_name(&tf->tf_disc_group, "discovery_auth",
+ &TF_CIT_TMPL(tf)->tfc_discovery_cit);
+
+ printk(KERN_INFO "Target_Core_ConfigFS: REGISTER -> Allocated Fabric:"
+ " %s\n", tf->tf_group.cg_item.ci_name);
+ /*
+ * Setup tf_ops.tf_subsys pointer for usage with configfs_depend_item()
+ */
+ tf->tf_ops.tf_subsys = tf->tf_subsys;
+ tf->tf_fabric = &tf->tf_group.cg_item;
+ printk(KERN_INFO "Target_Core_ConfigFS: REGISTER -> Set tf->tf_fabric"
+ " for %s\n", name);
+
+ return &tf->tf_group;
+}
+
+/*
+ * Called from struct target_core_group_ops->drop_item()
+ */
+static void target_core_deregister_fabric(
+ struct config_group *group,
+ struct config_item *item)
+{
+ struct target_fabric_configfs *tf = container_of(
+ to_config_group(item), struct target_fabric_configfs, tf_group);
+ struct config_group *tf_group;
+ struct config_item *df_item;
+ int i;
+
+ printk(KERN_INFO "Target_Core_ConfigFS: DEREGISTER -> Looking up %s in"
+ " tf list\n", config_item_name(item));
+
+ printk(KERN_INFO "Target_Core_ConfigFS: DEREGISTER -> located fabric:"
+ " %s\n", tf->tf_name);
+ atomic_dec(&tf->tf_access_cnt);
+
+ printk(KERN_INFO "Target_Core_ConfigFS: DEREGISTER -> Releasing"
+ " tf->tf_fabric for %s\n", tf->tf_name);
+ tf->tf_fabric = NULL;
+
+ printk(KERN_INFO "Target_Core_ConfigFS: DEREGISTER -> Releasing ci"
+ " %s\n", config_item_name(item));
+
+ tf_group = &tf->tf_group;
+ for (i = 0; tf_group->default_groups[i]; i++) {
+ df_item = &tf_group->default_groups[i]->cg_item;
+ tf_group->default_groups[i] = NULL;
+ config_item_put(df_item);
+ }
+ config_item_put(item);
+}
+
+static struct configfs_group_operations target_core_fabric_group_ops = {
+ .make_group = &target_core_register_fabric,
+ .drop_item = &target_core_deregister_fabric,
+};
+
+/*
+ * All item attributes appearing in /sys/kernel/target/ appear here.
+ */
+static struct configfs_attribute *target_core_fabric_item_attrs[] = {
+ &target_core_item_attr_version,
+ NULL,
+};
+
+/*
+ * Provides Fabrics Groups and Item Attributes for /sys/kernel/config/target/
+ */
+static struct config_item_type target_core_fabrics_item = {
+ .ct_item_ops = &target_core_fabric_item_ops,
+ .ct_group_ops = &target_core_fabric_group_ops,
+ .ct_attrs = target_core_fabric_item_attrs,
+ .ct_owner = THIS_MODULE,
+};
+
+static struct configfs_subsystem target_core_fabrics = {
+ .su_group = {
+ .cg_item = {
+ .ci_namebuf = "target",
+ .ci_type = &target_core_fabrics_item,
+ },
+ },
+};
+
+static struct configfs_subsystem *target_core_subsystem[] = {
+ &target_core_fabrics,
+ NULL,
+};
+
+/*##############################################################################
+// Start functions called by external Target Fabrics Modules
+//############################################################################*/
+
+/*
+ * First function called by fabric modules to:
+ *
+ * 1) Allocate a struct target_fabric_configfs and save the *fabric_cit pointer.
+ * 2) Add struct target_fabric_configfs to g_tf_list
+ * 3) Return struct target_fabric_configfs to fabric module to be passed
+ * into target_fabric_configfs_register().
+ */
+struct target_fabric_configfs *target_fabric_configfs_init(
+ struct module *fabric_mod,
+ const char *name)
+{
+ struct target_fabric_configfs *tf;
+
+ if (!(fabric_mod)) {
+ printk(KERN_ERR "Missing struct module *fabric_mod pointer\n");
+ return NULL;
+ }
+ if (!(name)) {
+ printk(KERN_ERR "Unable to locate passed fabric name\n");
+ return NULL;
+ }
+ if (strlen(name) > TARGET_FABRIC_NAME_SIZE) {
+ printk(KERN_ERR "Passed name: %s exceeds TARGET_FABRIC"
+ "_NAME_SIZE\n", name);
+ return NULL;
+ }
+
+ tf = kzalloc(sizeof(struct target_fabric_configfs), GFP_KERNEL);
+ if (!(tf))
+ return ERR_PTR(-ENOMEM);
+
+ INIT_LIST_HEAD(&tf->tf_list);
+ atomic_set(&tf->tf_access_cnt, 0);
+ /*
+ * Setup the default generic struct config_item_type's (cits) in
+ * struct target_fabric_configfs->tf_cit_tmpl
+ */
+ tf->tf_module = fabric_mod;
+ target_fabric_setup_cits(tf);
+
+ tf->tf_subsys = target_core_subsystem[0];
+ snprintf(tf->tf_name, TARGET_FABRIC_NAME_SIZE, "%s", name);
+
+ mutex_lock(&g_tf_lock);
+ list_add_tail(&tf->tf_list, &g_tf_list);
+ mutex_unlock(&g_tf_lock);
+
+ printk(KERN_INFO "<<<<<<<<<<<<<<<<<<<<<< BEGIN FABRIC API >>>>>>>>"
+ ">>>>>>>>>>>>>>\n");
+ printk(KERN_INFO "Initialized struct target_fabric_configfs: %p for"
+ " %s\n", tf, tf->tf_name);
+ return tf;
+}
+EXPORT_SYMBOL(target_fabric_configfs_init);
+
+/*
+ * Called by fabric plugins after FAILED target_fabric_configfs_register() call.
+ */
+void target_fabric_configfs_free(
+ struct target_fabric_configfs *tf)
+{
+ mutex_lock(&g_tf_lock);
+ list_del(&tf->tf_list);
+ mutex_unlock(&g_tf_lock);
+
+ kfree(tf);
+}
+EXPORT_SYMBOL(target_fabric_configfs_free);
+
+/*
+ * Perform a sanity check of the passed tf->tf_ops before completing
+ * TCM fabric module registration.
+ */
+static int target_fabric_tf_ops_check(
+ struct target_fabric_configfs *tf)
+{
+ struct target_core_fabric_ops *tfo = &tf->tf_ops;
+
+ if (!(tfo->get_fabric_name)) {
+ printk(KERN_ERR "Missing tfo->get_fabric_name()\n");
+ return -EINVAL;
+ }
+ if (!(tfo->get_fabric_proto_ident)) {
+ printk(KERN_ERR "Missing tfo->get_fabric_proto_ident()\n");
+ return -EINVAL;
+ }
+ if (!(tfo->tpg_get_wwn)) {
+ printk(KERN_ERR "Missing tfo->tpg_get_wwn()\n");
+ return -EINVAL;
+ }
+ if (!(tfo->tpg_get_tag)) {
+ printk(KERN_ERR "Missing tfo->tpg_get_tag()\n");
+ return -EINVAL;
+ }
+ if (!(tfo->tpg_get_default_depth)) {
+ printk(KERN_ERR "Missing tfo->tpg_get_default_depth()\n");
+ return -EINVAL;
+ }
+ if (!(tfo->tpg_get_pr_transport_id)) {
+ printk(KERN_ERR "Missing tfo->tpg_get_pr_transport_id()\n");
+ return -EINVAL;
+ }
+ if (!(tfo->tpg_get_pr_transport_id_len)) {
+ printk(KERN_ERR "Missing tfo->tpg_get_pr_transport_id_len()\n");
+ return -EINVAL;
+ }
+ if (!(tfo->tpg_check_demo_mode)) {
+ printk(KERN_ERR "Missing tfo->tpg_check_demo_mode()\n");
+ return -EINVAL;
+ }
+ if (!(tfo->tpg_check_demo_mode_cache)) {
+ printk(KERN_ERR "Missing tfo->tpg_check_demo_mode_cache()\n");
+ return -EINVAL;
+ }
+ if (!(tfo->tpg_check_demo_mode_write_protect)) {
+ printk(KERN_ERR "Missing tfo->tpg_check_demo_mode_write_protect()\n");
+ return -EINVAL;
+ }
+ if (!(tfo->tpg_check_prod_mode_write_protect)) {
+ printk(KERN_ERR "Missing tfo->tpg_check_prod_mode_write_protect()\n");
+ return -EINVAL;
+ }
+ if (!(tfo->tpg_alloc_fabric_acl)) {
+ printk(KERN_ERR "Missing tfo->tpg_alloc_fabric_acl()\n");
+ return -EINVAL;
+ }
+ if (!(tfo->tpg_release_fabric_acl)) {
+ printk(KERN_ERR "Missing tfo->tpg_release_fabric_acl()\n");
+ return -EINVAL;
+ }
+ if (!(tfo->tpg_get_inst_index)) {
+ printk(KERN_ERR "Missing tfo->tpg_get_inst_index()\n");
+ return -EINVAL;
+ }
+ if (!(tfo->release_cmd_to_pool)) {
+ printk(KERN_ERR "Missing tfo->release_cmd_to_pool()\n");
+ return -EINVAL;
+ }
+ if (!(tfo->release_cmd_direct)) {
+ printk(KERN_ERR "Missing tfo->release_cmd_direct()\n");
+ return -EINVAL;
+ }
+ if (!(tfo->shutdown_session)) {
+ printk(KERN_ERR "Missing tfo->shutdown_session()\n");
+ return -EINVAL;
+ }
+ if (!(tfo->close_session)) {
+ printk(KERN_ERR "Missing tfo->close_session()\n");
+ return -EINVAL;
+ }
+ if (!(tfo->stop_session)) {
+ printk(KERN_ERR "Missing tfo->stop_session()\n");
+ return -EINVAL;
+ }
+ if (!(tfo->fall_back_to_erl0)) {
+ printk(KERN_ERR "Missing tfo->fall_back_to_erl0()\n");
+ return -EINVAL;
+ }
+ if (!(tfo->sess_logged_in)) {
+ printk(KERN_ERR "Missing tfo->sess_logged_in()\n");
+ return -EINVAL;
+ }
+ if (!(tfo->sess_get_index)) {
+ printk(KERN_ERR "Missing tfo->sess_get_index()\n");
+ return -EINVAL;
+ }
+ if (!(tfo->write_pending)) {
+ printk(KERN_ERR "Missing tfo->write_pending()\n");
+ return -EINVAL;
+ }
+ if (!(tfo->write_pending_status)) {
+ printk(KERN_ERR "Missing tfo->write_pending_status()\n");
+ return -EINVAL;
+ }
+ if (!(tfo->set_default_node_attributes)) {
+ printk(KERN_ERR "Missing tfo->set_default_node_attributes()\n");
+ return -EINVAL;
+ }
+ if (!(tfo->get_task_tag)) {
+ printk(KERN_ERR "Missing tfo->get_task_tag()\n");
+ return -EINVAL;
+ }
+ if (!(tfo->get_cmd_state)) {
+ printk(KERN_ERR "Missing tfo->get_cmd_state()\n");
+ return -EINVAL;
+ }
+ if (!(tfo->new_cmd_failure)) {
+ printk(KERN_ERR "Missing tfo->new_cmd_failure()\n");
+ return -EINVAL;
+ }
+ if (!(tfo->queue_data_in)) {
+ printk(KERN_ERR "Missing tfo->queue_data_in()\n");
+ return -EINVAL;
+ }
+ if (!(tfo->queue_status)) {
+ printk(KERN_ERR "Missing tfo->queue_status()\n");
+ return -EINVAL;
+ }
+ if (!(tfo->queue_tm_rsp)) {
+ printk(KERN_ERR "Missing tfo->queue_tm_rsp()\n");
+ return -EINVAL;
+ }
+ if (!(tfo->set_fabric_sense_len)) {
+ printk(KERN_ERR "Missing tfo->set_fabric_sense_len()\n");
+ return -EINVAL;
+ }
+ if (!(tfo->get_fabric_sense_len)) {
+ printk(KERN_ERR "Missing tfo->get_fabric_sense_len()\n");
+ return -EINVAL;
+ }
+ if (!(tfo->is_state_remove)) {
+ printk(KERN_ERR "Missing tfo->is_state_remove()\n");
+ return -EINVAL;
+ }
+ if (!(tfo->pack_lun)) {
+ printk(KERN_ERR "Missing tfo->pack_lun()\n");
+ return -EINVAL;
+ }
+ /*
+ * We at least require tfo->fabric_make_wwn(), tfo->fabric_drop_wwn()
+ * tfo->fabric_make_tpg() and tfo->fabric_drop_tpg() in
+ * target_core_fabric_configfs.c WWN+TPG group context code.
+ */
+ if (!(tfo->fabric_make_wwn)) {
+ printk(KERN_ERR "Missing tfo->fabric_make_wwn()\n");
+ return -EINVAL;
+ }
+ if (!(tfo->fabric_drop_wwn)) {
+ printk(KERN_ERR "Missing tfo->fabric_drop_wwn()\n");
+ return -EINVAL;
+ }
+ if (!(tfo->fabric_make_tpg)) {
+ printk(KERN_ERR "Missing tfo->fabric_make_tpg()\n");
+ return -EINVAL;
+ }
+ if (!(tfo->fabric_drop_tpg)) {
+ printk(KERN_ERR "Missing tfo->fabric_drop_tpg()\n");
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+/*
+ * Called 2nd from fabric module with returned parameter of
+ * struct target_fabric_configfs * from target_fabric_configfs_init().
+ *
+ * Upon a successful registration, the new fabric's struct config_item is
+ * return. Also, a pointer to this struct is set in the passed
+ * struct target_fabric_configfs.
+ */
+int target_fabric_configfs_register(
+ struct target_fabric_configfs *tf)
+{
+ struct config_group *su_group;
+ int ret;
+
+ if (!(tf)) {
+ printk(KERN_ERR "Unable to locate target_fabric_configfs"
+ " pointer\n");
+ return -EINVAL;
+ }
+ if (!(tf->tf_subsys)) {
+ printk(KERN_ERR "Unable to target struct config_subsystem"
+ " pointer\n");
+ return -EINVAL;
+ }
+ su_group = &tf->tf_subsys->su_group;
+ if (!(su_group)) {
+ printk(KERN_ERR "Unable to locate target struct config_group"
+ " pointer\n");
+ return -EINVAL;
+ }
+ ret = target_fabric_tf_ops_check(tf);
+ if (ret < 0)
+ return ret;
+
+ printk(KERN_INFO "<<<<<<<<<<<<<<<<<<<<<< END FABRIC API >>>>>>>>>>>>"
+ ">>>>>>>>>>\n");
+ return 0;
+}
+EXPORT_SYMBOL(target_fabric_configfs_register);
+
+void target_fabric_configfs_deregister(
+ struct target_fabric_configfs *tf)
+{
+ struct config_group *su_group;
+ struct configfs_subsystem *su;
+
+ if (!(tf)) {
+ printk(KERN_ERR "Unable to locate passed target_fabric_"
+ "configfs\n");
+ return;
+ }
+ su = tf->tf_subsys;
+ if (!(su)) {
+ printk(KERN_ERR "Unable to locate passed tf->tf_subsys"
+ " pointer\n");
+ return;
+ }
+ su_group = &tf->tf_subsys->su_group;
+ if (!(su_group)) {
+ printk(KERN_ERR "Unable to locate target struct config_group"
+ " pointer\n");
+ return;
+ }
+
+ printk(KERN_INFO "<<<<<<<<<<<<<<<<<<<<<< BEGIN FABRIC API >>>>>>>>>>"
+ ">>>>>>>>>>>>\n");
+ mutex_lock(&g_tf_lock);
+ if (atomic_read(&tf->tf_access_cnt)) {
+ mutex_unlock(&g_tf_lock);
+ printk(KERN_ERR "Non zero tf->tf_access_cnt for fabric %s\n",
+ tf->tf_name);
+ BUG();
+ }
+ list_del(&tf->tf_list);
+ mutex_unlock(&g_tf_lock);
+
+ printk(KERN_INFO "Target_Core_ConfigFS: DEREGISTER -> Releasing tf:"
+ " %s\n", tf->tf_name);
+ tf->tf_module = NULL;
+ tf->tf_subsys = NULL;
+ kfree(tf);
+
+ printk("<<<<<<<<<<<<<<<<<<<<<< END FABRIC API >>>>>>>>>>>>>>>>>"
+ ">>>>>\n");
+ return;
+}
+EXPORT_SYMBOL(target_fabric_configfs_deregister);
+
+/*##############################################################################
+// Stop functions called by external Target Fabrics Modules
+//############################################################################*/
+
+/* Start functions for struct config_item_type target_core_dev_attrib_cit */
+
+#define DEF_DEV_ATTRIB_SHOW(_name) \
+static ssize_t target_core_dev_show_attr_##_name( \
+ struct se_dev_attrib *da, \
+ char *page) \
+{ \
+ struct se_device *dev; \
+ struct se_subsystem_dev *se_dev = da->da_sub_dev; \
+ ssize_t rb; \
+ \
+ spin_lock(&se_dev->se_dev_lock); \
+ dev = se_dev->se_dev_ptr; \
+ if (!(dev)) { \
+ spin_unlock(&se_dev->se_dev_lock); \
+ return -ENODEV; \
+ } \
+ rb = snprintf(page, PAGE_SIZE, "%u\n", (u32)DEV_ATTRIB(dev)->_name); \
+ spin_unlock(&se_dev->se_dev_lock); \
+ \
+ return rb; \
+}
+
+#define DEF_DEV_ATTRIB_STORE(_name) \
+static ssize_t target_core_dev_store_attr_##_name( \
+ struct se_dev_attrib *da, \
+ const char *page, \
+ size_t count) \
+{ \
+ struct se_device *dev; \
+ struct se_subsystem_dev *se_dev = da->da_sub_dev; \
+ unsigned long val; \
+ int ret; \
+ \
+ spin_lock(&se_dev->se_dev_lock); \
+ dev = se_dev->se_dev_ptr; \
+ if (!(dev)) { \
+ spin_unlock(&se_dev->se_dev_lock); \
+ return -ENODEV; \
+ } \
+ ret = strict_strtoul(page, 0, &val); \
+ if (ret < 0) { \
+ printk(KERN_ERR "strict_strtoul() failed with" \
+ " ret: %d\n", ret); \
+ return -EINVAL; \
+ } \
+ ret = se_dev_set_##_name(dev, (u32)val); \
+ spin_unlock(&se_dev->se_dev_lock); \
+ \
+ return (!ret) ? count : -EINVAL; \
+}
+
+#define DEF_DEV_ATTRIB(_name) \
+DEF_DEV_ATTRIB_SHOW(_name); \
+DEF_DEV_ATTRIB_STORE(_name);
+
+#define DEF_DEV_ATTRIB_RO(_name) \
+DEF_DEV_ATTRIB_SHOW(_name);
+
+CONFIGFS_EATTR_STRUCT(target_core_dev_attrib, se_dev_attrib);
+#define SE_DEV_ATTR(_name, _mode) \
+static struct target_core_dev_attrib_attribute \
+ target_core_dev_attrib_##_name = \
+ __CONFIGFS_EATTR(_name, _mode, \
+ target_core_dev_show_attr_##_name, \
+ target_core_dev_store_attr_##_name);
+
+#define SE_DEV_ATTR_RO(_name); \
+static struct target_core_dev_attrib_attribute \
+ target_core_dev_attrib_##_name = \
+ __CONFIGFS_EATTR_RO(_name, \
+ target_core_dev_show_attr_##_name);
+
+DEF_DEV_ATTRIB(emulate_dpo);
+SE_DEV_ATTR(emulate_dpo, S_IRUGO | S_IWUSR);
+
+DEF_DEV_ATTRIB(emulate_fua_write);
+SE_DEV_ATTR(emulate_fua_write, S_IRUGO | S_IWUSR);
+
+DEF_DEV_ATTRIB(emulate_fua_read);
+SE_DEV_ATTR(emulate_fua_read, S_IRUGO | S_IWUSR);
+
+DEF_DEV_ATTRIB(emulate_write_cache);
+SE_DEV_ATTR(emulate_write_cache, S_IRUGO | S_IWUSR);
+
+DEF_DEV_ATTRIB(emulate_ua_intlck_ctrl);
+SE_DEV_ATTR(emulate_ua_intlck_ctrl, S_IRUGO | S_IWUSR);
+
+DEF_DEV_ATTRIB(emulate_tas);
+SE_DEV_ATTR(emulate_tas, S_IRUGO | S_IWUSR);
+
+DEF_DEV_ATTRIB(emulate_tpu);
+SE_DEV_ATTR(emulate_tpu, S_IRUGO | S_IWUSR);
+
+DEF_DEV_ATTRIB(emulate_tpws);
+SE_DEV_ATTR(emulate_tpws, S_IRUGO | S_IWUSR);
+
+DEF_DEV_ATTRIB(enforce_pr_isids);
+SE_DEV_ATTR(enforce_pr_isids, S_IRUGO | S_IWUSR);
+
+DEF_DEV_ATTRIB_RO(hw_block_size);
+SE_DEV_ATTR_RO(hw_block_size);
+
+DEF_DEV_ATTRIB(block_size);
+SE_DEV_ATTR(block_size, S_IRUGO | S_IWUSR);
+
+DEF_DEV_ATTRIB_RO(hw_max_sectors);
+SE_DEV_ATTR_RO(hw_max_sectors);
+
+DEF_DEV_ATTRIB(max_sectors);
+SE_DEV_ATTR(max_sectors, S_IRUGO | S_IWUSR);
+
+DEF_DEV_ATTRIB(optimal_sectors);
+SE_DEV_ATTR(optimal_sectors, S_IRUGO | S_IWUSR);
+
+DEF_DEV_ATTRIB_RO(hw_queue_depth);
+SE_DEV_ATTR_RO(hw_queue_depth);
+
+DEF_DEV_ATTRIB(queue_depth);
+SE_DEV_ATTR(queue_depth, S_IRUGO | S_IWUSR);
+
+DEF_DEV_ATTRIB(task_timeout);
+SE_DEV_ATTR(task_timeout, S_IRUGO | S_IWUSR);
+
+DEF_DEV_ATTRIB(max_unmap_lba_count);
+SE_DEV_ATTR(max_unmap_lba_count, S_IRUGO | S_IWUSR);
+
+DEF_DEV_ATTRIB(max_unmap_block_desc_count);
+SE_DEV_ATTR(max_unmap_block_desc_count, S_IRUGO | S_IWUSR);
+
+DEF_DEV_ATTRIB(unmap_granularity);
+SE_DEV_ATTR(unmap_granularity, S_IRUGO | S_IWUSR);
+
+DEF_DEV_ATTRIB(unmap_granularity_alignment);
+SE_DEV_ATTR(unmap_granularity_alignment, S_IRUGO | S_IWUSR);
+
+CONFIGFS_EATTR_OPS(target_core_dev_attrib, se_dev_attrib, da_group);
+
+static struct configfs_attribute *target_core_dev_attrib_attrs[] = {
+ &target_core_dev_attrib_emulate_dpo.attr,
+ &target_core_dev_attrib_emulate_fua_write.attr,
+ &target_core_dev_attrib_emulate_fua_read.attr,
+ &target_core_dev_attrib_emulate_write_cache.attr,
+ &target_core_dev_attrib_emulate_ua_intlck_ctrl.attr,
+ &target_core_dev_attrib_emulate_tas.attr,
+ &target_core_dev_attrib_emulate_tpu.attr,
+ &target_core_dev_attrib_emulate_tpws.attr,
+ &target_core_dev_attrib_enforce_pr_isids.attr,
+ &target_core_dev_attrib_hw_block_size.attr,
+ &target_core_dev_attrib_block_size.attr,
+ &target_core_dev_attrib_hw_max_sectors.attr,
+ &target_core_dev_attrib_max_sectors.attr,
+ &target_core_dev_attrib_optimal_sectors.attr,
+ &target_core_dev_attrib_hw_queue_depth.attr,
+ &target_core_dev_attrib_queue_depth.attr,
+ &target_core_dev_attrib_task_timeout.attr,
+ &target_core_dev_attrib_max_unmap_lba_count.attr,
+ &target_core_dev_attrib_max_unmap_block_desc_count.attr,
+ &target_core_dev_attrib_unmap_granularity.attr,
+ &target_core_dev_attrib_unmap_granularity_alignment.attr,
+ NULL,
+};
+
+static struct configfs_item_operations target_core_dev_attrib_ops = {
+ .show_attribute = target_core_dev_attrib_attr_show,
+ .store_attribute = target_core_dev_attrib_attr_store,
+};
+
+static struct config_item_type target_core_dev_attrib_cit = {
+ .ct_item_ops = &target_core_dev_attrib_ops,
+ .ct_attrs = target_core_dev_attrib_attrs,
+ .ct_owner = THIS_MODULE,
+};
+
+/* End functions for struct config_item_type target_core_dev_attrib_cit */
+
+/* Start functions for struct config_item_type target_core_dev_wwn_cit */
+
+CONFIGFS_EATTR_STRUCT(target_core_dev_wwn, t10_wwn);
+#define SE_DEV_WWN_ATTR(_name, _mode) \
+static struct target_core_dev_wwn_attribute target_core_dev_wwn_##_name = \
+ __CONFIGFS_EATTR(_name, _mode, \
+ target_core_dev_wwn_show_attr_##_name, \
+ target_core_dev_wwn_store_attr_##_name);
+
+#define SE_DEV_WWN_ATTR_RO(_name); \
+do { \
+ static struct target_core_dev_wwn_attribute \
+ target_core_dev_wwn_##_name = \
+ __CONFIGFS_EATTR_RO(_name, \
+ target_core_dev_wwn_show_attr_##_name); \
+} while (0);
+
+/*
+ * VPD page 0x80 Unit serial
+ */
+static ssize_t target_core_dev_wwn_show_attr_vpd_unit_serial(
+ struct t10_wwn *t10_wwn,
+ char *page)
+{
+ struct se_subsystem_dev *se_dev = t10_wwn->t10_sub_dev;
+ struct se_device *dev;
+
+ dev = se_dev->se_dev_ptr;
+ if (!(dev))
+ return -ENODEV;
+
+ return sprintf(page, "T10 VPD Unit Serial Number: %s\n",
+ &t10_wwn->unit_serial[0]);
+}
+
+static ssize_t target_core_dev_wwn_store_attr_vpd_unit_serial(
+ struct t10_wwn *t10_wwn,
+ const char *page,
+ size_t count)
+{
+ struct se_subsystem_dev *su_dev = t10_wwn->t10_sub_dev;
+ struct se_device *dev;
+ unsigned char buf[INQUIRY_VPD_SERIAL_LEN];
+
+ /*
+ * If Linux/SCSI subsystem_api_t plugin got a VPD Unit Serial
+ * from the struct scsi_device level firmware, do not allow
+ * VPD Unit Serial to be emulated.
+ *
+ * Note this struct scsi_device could also be emulating VPD
+ * information from its drivers/scsi LLD. But for now we assume
+ * it is doing 'the right thing' wrt a world wide unique
+ * VPD Unit Serial Number that OS dependent multipath can depend on.
+ */
+ if (su_dev->su_dev_flags & SDF_FIRMWARE_VPD_UNIT_SERIAL) {
+ printk(KERN_ERR "Underlying SCSI device firmware provided VPD"
+ " Unit Serial, ignoring request\n");
+ return -EOPNOTSUPP;
+ }
+
+ if ((strlen(page) + 1) > INQUIRY_VPD_SERIAL_LEN) {
+ printk(KERN_ERR "Emulated VPD Unit Serial exceeds"
+ " INQUIRY_VPD_SERIAL_LEN: %d\n", INQUIRY_VPD_SERIAL_LEN);
+ return -EOVERFLOW;
+ }
+ /*
+ * Check to see if any active $FABRIC_MOD exports exist. If they
+ * do exist, fail here as changing this information on the fly
+ * (underneath the initiator side OS dependent multipath code)
+ * could cause negative effects.
+ */
+ dev = su_dev->se_dev_ptr;
+ if ((dev)) {
+ if (atomic_read(&dev->dev_export_obj.obj_access_count)) {
+ printk(KERN_ERR "Unable to set VPD Unit Serial while"
+ " active %d $FABRIC_MOD exports exist\n",
+ atomic_read(&dev->dev_export_obj.obj_access_count));
+ return -EINVAL;
+ }
+ }
+ /*
+ * This currently assumes ASCII encoding for emulated VPD Unit Serial.
+ *
+ * Also, strip any newline added from the userspace
+ * echo $UUID > $TARGET/$HBA/$STORAGE_OBJECT/wwn/vpd_unit_serial
+ */
+ memset(buf, 0, INQUIRY_VPD_SERIAL_LEN);
+ snprintf(buf, INQUIRY_VPD_SERIAL_LEN, "%s", page);
+ snprintf(su_dev->t10_wwn.unit_serial, INQUIRY_VPD_SERIAL_LEN,
+ "%s", strstrip(buf));
+ su_dev->su_dev_flags |= SDF_EMULATED_VPD_UNIT_SERIAL;
+
+ printk(KERN_INFO "Target_Core_ConfigFS: Set emulated VPD Unit Serial:"
+ " %s\n", su_dev->t10_wwn.unit_serial);
+
+ return count;
+}
+
+SE_DEV_WWN_ATTR(vpd_unit_serial, S_IRUGO | S_IWUSR);
+
+/*
+ * VPD page 0x83 Protocol Identifier
+ */
+static ssize_t target_core_dev_wwn_show_attr_vpd_protocol_identifier(
+ struct t10_wwn *t10_wwn,
+ char *page)
+{
+ struct se_subsystem_dev *se_dev = t10_wwn->t10_sub_dev;
+ struct se_device *dev;
+ struct t10_vpd *vpd;
+ unsigned char buf[VPD_TMP_BUF_SIZE];
+ ssize_t len = 0;
+
+ dev = se_dev->se_dev_ptr;
+ if (!(dev))
+ return -ENODEV;
+
+ memset(buf, 0, VPD_TMP_BUF_SIZE);
+
+ spin_lock(&t10_wwn->t10_vpd_lock);
+ list_for_each_entry(vpd, &t10_wwn->t10_vpd_list, vpd_list) {
+ if (!(vpd->protocol_identifier_set))
+ continue;
+
+ transport_dump_vpd_proto_id(vpd, buf, VPD_TMP_BUF_SIZE);
+
+ if ((len + strlen(buf) > PAGE_SIZE))
+ break;
+
+ len += sprintf(page+len, "%s", buf);
+ }
+ spin_unlock(&t10_wwn->t10_vpd_lock);
+
+ return len;
+}
+
+static ssize_t target_core_dev_wwn_store_attr_vpd_protocol_identifier(
+ struct t10_wwn *t10_wwn,
+ const char *page,
+ size_t count)
+{
+ return -ENOSYS;
+}
+
+SE_DEV_WWN_ATTR(vpd_protocol_identifier, S_IRUGO | S_IWUSR);
+
+/*
+ * Generic wrapper for dumping VPD identifiers by association.
+ */
+#define DEF_DEV_WWN_ASSOC_SHOW(_name, _assoc) \
+static ssize_t target_core_dev_wwn_show_attr_##_name( \
+ struct t10_wwn *t10_wwn, \
+ char *page) \
+{ \
+ struct se_subsystem_dev *se_dev = t10_wwn->t10_sub_dev; \
+ struct se_device *dev; \
+ struct t10_vpd *vpd; \
+ unsigned char buf[VPD_TMP_BUF_SIZE]; \
+ ssize_t len = 0; \
+ \
+ dev = se_dev->se_dev_ptr; \
+ if (!(dev)) \
+ return -ENODEV; \
+ \
+ spin_lock(&t10_wwn->t10_vpd_lock); \
+ list_for_each_entry(vpd, &t10_wwn->t10_vpd_list, vpd_list) { \
+ if (vpd->association != _assoc) \
+ continue; \
+ \
+ memset(buf, 0, VPD_TMP_BUF_SIZE); \
+ transport_dump_vpd_assoc(vpd, buf, VPD_TMP_BUF_SIZE); \
+ if ((len + strlen(buf) > PAGE_SIZE)) \
+ break; \
+ len += sprintf(page+len, "%s", buf); \
+ \
+ memset(buf, 0, VPD_TMP_BUF_SIZE); \
+ transport_dump_vpd_ident_type(vpd, buf, VPD_TMP_BUF_SIZE); \
+ if ((len + strlen(buf) > PAGE_SIZE)) \
+ break; \
+ len += sprintf(page+len, "%s", buf); \
+ \
+ memset(buf, 0, VPD_TMP_BUF_SIZE); \
+ transport_dump_vpd_ident(vpd, buf, VPD_TMP_BUF_SIZE); \
+ if ((len + strlen(buf) > PAGE_SIZE)) \
+ break; \
+ len += sprintf(page+len, "%s", buf); \
+ } \
+ spin_unlock(&t10_wwn->t10_vpd_lock); \
+ \
+ return len; \
+}
+
+/*
+ * VPD page 0x83 Assoication: Logical Unit
+ */
+DEF_DEV_WWN_ASSOC_SHOW(vpd_assoc_logical_unit, 0x00);
+
+static ssize_t target_core_dev_wwn_store_attr_vpd_assoc_logical_unit(
+ struct t10_wwn *t10_wwn,
+ const char *page,
+ size_t count)
+{
+ return -ENOSYS;
+}
+
+SE_DEV_WWN_ATTR(vpd_assoc_logical_unit, S_IRUGO | S_IWUSR);
+
+/*
+ * VPD page 0x83 Association: Target Port
+ */
+DEF_DEV_WWN_ASSOC_SHOW(vpd_assoc_target_port, 0x10);
+
+static ssize_t target_core_dev_wwn_store_attr_vpd_assoc_target_port(
+ struct t10_wwn *t10_wwn,
+ const char *page,
+ size_t count)
+{
+ return -ENOSYS;
+}
+
+SE_DEV_WWN_ATTR(vpd_assoc_target_port, S_IRUGO | S_IWUSR);
+
+/*
+ * VPD page 0x83 Association: SCSI Target Device
+ */
+DEF_DEV_WWN_ASSOC_SHOW(vpd_assoc_scsi_target_device, 0x20);
+
+static ssize_t target_core_dev_wwn_store_attr_vpd_assoc_scsi_target_device(
+ struct t10_wwn *t10_wwn,
+ const char *page,
+ size_t count)
+{
+ return -ENOSYS;
+}
+
+SE_DEV_WWN_ATTR(vpd_assoc_scsi_target_device, S_IRUGO | S_IWUSR);
+
+CONFIGFS_EATTR_OPS(target_core_dev_wwn, t10_wwn, t10_wwn_group);
+
+static struct configfs_attribute *target_core_dev_wwn_attrs[] = {
+ &target_core_dev_wwn_vpd_unit_serial.attr,
+ &target_core_dev_wwn_vpd_protocol_identifier.attr,
+ &target_core_dev_wwn_vpd_assoc_logical_unit.attr,
+ &target_core_dev_wwn_vpd_assoc_target_port.attr,
+ &target_core_dev_wwn_vpd_assoc_scsi_target_device.attr,
+ NULL,
+};
+
+static struct configfs_item_operations target_core_dev_wwn_ops = {
+ .show_attribute = target_core_dev_wwn_attr_show,
+ .store_attribute = target_core_dev_wwn_attr_store,
+};
+
+static struct config_item_type target_core_dev_wwn_cit = {
+ .ct_item_ops = &target_core_dev_wwn_ops,
+ .ct_attrs = target_core_dev_wwn_attrs,
+ .ct_owner = THIS_MODULE,
+};
+
+/* End functions for struct config_item_type target_core_dev_wwn_cit */
+
+/* Start functions for struct config_item_type target_core_dev_pr_cit */
+
+CONFIGFS_EATTR_STRUCT(target_core_dev_pr, se_subsystem_dev);
+#define SE_DEV_PR_ATTR(_name, _mode) \
+static struct target_core_dev_pr_attribute target_core_dev_pr_##_name = \
+ __CONFIGFS_EATTR(_name, _mode, \
+ target_core_dev_pr_show_attr_##_name, \
+ target_core_dev_pr_store_attr_##_name);
+
+#define SE_DEV_PR_ATTR_RO(_name); \
+static struct target_core_dev_pr_attribute target_core_dev_pr_##_name = \
+ __CONFIGFS_EATTR_RO(_name, \
+ target_core_dev_pr_show_attr_##_name);
+
+/*
+ * res_holder
+ */
+static ssize_t target_core_dev_pr_show_spc3_res(
+ struct se_device *dev,
+ char *page,
+ ssize_t *len)
+{
+ struct se_node_acl *se_nacl;
+ struct t10_pr_registration *pr_reg;
+ char i_buf[PR_REG_ISID_ID_LEN];
+ int prf_isid;
+
+ memset(i_buf, 0, PR_REG_ISID_ID_LEN);
+
+ spin_lock(&dev->dev_reservation_lock);
+ pr_reg = dev->dev_pr_res_holder;
+ if (!(pr_reg)) {
+ *len += sprintf(page + *len, "No SPC-3 Reservation holder\n");
+ spin_unlock(&dev->dev_reservation_lock);
+ return *len;
+ }
+ se_nacl = pr_reg->pr_reg_nacl;
+ prf_isid = core_pr_dump_initiator_port(pr_reg, &i_buf[0],
+ PR_REG_ISID_ID_LEN);
+
+ *len += sprintf(page + *len, "SPC-3 Reservation: %s Initiator: %s%s\n",
+ TPG_TFO(se_nacl->se_tpg)->get_fabric_name(),
+ se_nacl->initiatorname, (prf_isid) ? &i_buf[0] : "");
+ spin_unlock(&dev->dev_reservation_lock);
+
+ return *len;
+}
+
+static ssize_t target_core_dev_pr_show_spc2_res(
+ struct se_device *dev,
+ char *page,
+ ssize_t *len)
+{
+ struct se_node_acl *se_nacl;
+
+ spin_lock(&dev->dev_reservation_lock);
+ se_nacl = dev->dev_reserved_node_acl;
+ if (!(se_nacl)) {
+ *len += sprintf(page + *len, "No SPC-2 Reservation holder\n");
+ spin_unlock(&dev->dev_reservation_lock);
+ return *len;
+ }
+ *len += sprintf(page + *len, "SPC-2 Reservation: %s Initiator: %s\n",
+ TPG_TFO(se_nacl->se_tpg)->get_fabric_name(),
+ se_nacl->initiatorname);
+ spin_unlock(&dev->dev_reservation_lock);
+
+ return *len;
+}
+
+static ssize_t target_core_dev_pr_show_attr_res_holder(
+ struct se_subsystem_dev *su_dev,
+ char *page)
+{
+ ssize_t len = 0;
+
+ if (!(su_dev->se_dev_ptr))
+ return -ENODEV;
+
+ switch (T10_RES(su_dev)->res_type) {
+ case SPC3_PERSISTENT_RESERVATIONS:
+ target_core_dev_pr_show_spc3_res(su_dev->se_dev_ptr,
+ page, &len);
+ break;
+ case SPC2_RESERVATIONS:
+ target_core_dev_pr_show_spc2_res(su_dev->se_dev_ptr,
+ page, &len);
+ break;
+ case SPC_PASSTHROUGH:
+ len += sprintf(page+len, "Passthrough\n");
+ break;
+ default:
+ len += sprintf(page+len, "Unknown\n");
+ break;
+ }
+
+ return len;
+}
+
+SE_DEV_PR_ATTR_RO(res_holder);
+
+/*
+ * res_pr_all_tgt_pts
+ */
+static ssize_t target_core_dev_pr_show_attr_res_pr_all_tgt_pts(
+ struct se_subsystem_dev *su_dev,
+ char *page)
+{
+ struct se_device *dev;
+ struct t10_pr_registration *pr_reg;
+ ssize_t len = 0;
+
+ dev = su_dev->se_dev_ptr;
+ if (!(dev))
+ return -ENODEV;
+
+ if (T10_RES(su_dev)->res_type != SPC3_PERSISTENT_RESERVATIONS)
+ return len;
+
+ spin_lock(&dev->dev_reservation_lock);
+ pr_reg = dev->dev_pr_res_holder;
+ if (!(pr_reg)) {
+ len = sprintf(page, "No SPC-3 Reservation holder\n");
+ spin_unlock(&dev->dev_reservation_lock);
+ return len;
+ }
+ /*
+ * See All Target Ports (ALL_TG_PT) bit in spcr17, section 6.14.3
+ * Basic PERSISTENT RESERVER OUT parameter list, page 290
+ */
+ if (pr_reg->pr_reg_all_tg_pt)
+ len = sprintf(page, "SPC-3 Reservation: All Target"
+ " Ports registration\n");
+ else
+ len = sprintf(page, "SPC-3 Reservation: Single"
+ " Target Port registration\n");
+ spin_unlock(&dev->dev_reservation_lock);
+
+ return len;
+}
+
+SE_DEV_PR_ATTR_RO(res_pr_all_tgt_pts);
+
+/*
+ * res_pr_generation
+ */
+static ssize_t target_core_dev_pr_show_attr_res_pr_generation(
+ struct se_subsystem_dev *su_dev,
+ char *page)
+{
+ if (!(su_dev->se_dev_ptr))
+ return -ENODEV;
+
+ if (T10_RES(su_dev)->res_type != SPC3_PERSISTENT_RESERVATIONS)
+ return 0;
+
+ return sprintf(page, "0x%08x\n", T10_RES(su_dev)->pr_generation);
+}
+
+SE_DEV_PR_ATTR_RO(res_pr_generation);
+
+/*
+ * res_pr_holder_tg_port
+ */
+static ssize_t target_core_dev_pr_show_attr_res_pr_holder_tg_port(
+ struct se_subsystem_dev *su_dev,
+ char *page)
+{
+ struct se_device *dev;
+ struct se_node_acl *se_nacl;
+ struct se_lun *lun;
+ struct se_portal_group *se_tpg;
+ struct t10_pr_registration *pr_reg;
+ struct target_core_fabric_ops *tfo;
+ ssize_t len = 0;
+
+ dev = su_dev->se_dev_ptr;
+ if (!(dev))
+ return -ENODEV;
+
+ if (T10_RES(su_dev)->res_type != SPC3_PERSISTENT_RESERVATIONS)
+ return len;
+
+ spin_lock(&dev->dev_reservation_lock);
+ pr_reg = dev->dev_pr_res_holder;
+ if (!(pr_reg)) {
+ len = sprintf(page, "No SPC-3 Reservation holder\n");
+ spin_unlock(&dev->dev_reservation_lock);
+ return len;
+ }
+ se_nacl = pr_reg->pr_reg_nacl;
+ se_tpg = se_nacl->se_tpg;
+ lun = pr_reg->pr_reg_tg_pt_lun;
+ tfo = TPG_TFO(se_tpg);
+
+ len += sprintf(page+len, "SPC-3 Reservation: %s"
+ " Target Node Endpoint: %s\n", tfo->get_fabric_name(),
+ tfo->tpg_get_wwn(se_tpg));
+ len += sprintf(page+len, "SPC-3 Reservation: Relative Port"
+ " Identifer Tag: %hu %s Portal Group Tag: %hu"
+ " %s Logical Unit: %u\n", lun->lun_sep->sep_rtpi,
+ tfo->get_fabric_name(), tfo->tpg_get_tag(se_tpg),
+ tfo->get_fabric_name(), lun->unpacked_lun);
+ spin_unlock(&dev->dev_reservation_lock);
+
+ return len;
+}
+
+SE_DEV_PR_ATTR_RO(res_pr_holder_tg_port);
+
+/*
+ * res_pr_registered_i_pts
+ */
+static ssize_t target_core_dev_pr_show_attr_res_pr_registered_i_pts(
+ struct se_subsystem_dev *su_dev,
+ char *page)
+{
+ struct target_core_fabric_ops *tfo;
+ struct t10_pr_registration *pr_reg;
+ unsigned char buf[384];
+ char i_buf[PR_REG_ISID_ID_LEN];
+ ssize_t len = 0;
+ int reg_count = 0, prf_isid;
+
+ if (!(su_dev->se_dev_ptr))
+ return -ENODEV;
+
+ if (T10_RES(su_dev)->res_type != SPC3_PERSISTENT_RESERVATIONS)
+ return len;
+
+ len += sprintf(page+len, "SPC-3 PR Registrations:\n");
+
+ spin_lock(&T10_RES(su_dev)->registration_lock);
+ list_for_each_entry(pr_reg, &T10_RES(su_dev)->registration_list,
+ pr_reg_list) {
+
+ memset(buf, 0, 384);
+ memset(i_buf, 0, PR_REG_ISID_ID_LEN);
+ tfo = pr_reg->pr_reg_nacl->se_tpg->se_tpg_tfo;
+ prf_isid = core_pr_dump_initiator_port(pr_reg, &i_buf[0],
+ PR_REG_ISID_ID_LEN);
+ sprintf(buf, "%s Node: %s%s Key: 0x%016Lx PRgen: 0x%08x\n",
+ tfo->get_fabric_name(),
+ pr_reg->pr_reg_nacl->initiatorname, (prf_isid) ?
+ &i_buf[0] : "", pr_reg->pr_res_key,
+ pr_reg->pr_res_generation);
+
+ if ((len + strlen(buf) > PAGE_SIZE))
+ break;
+
+ len += sprintf(page+len, "%s", buf);
+ reg_count++;
+ }
+ spin_unlock(&T10_RES(su_dev)->registration_lock);
+
+ if (!(reg_count))
+ len += sprintf(page+len, "None\n");
+
+ return len;
+}
+
+SE_DEV_PR_ATTR_RO(res_pr_registered_i_pts);
+
+/*
+ * res_pr_type
+ */
+static ssize_t target_core_dev_pr_show_attr_res_pr_type(
+ struct se_subsystem_dev *su_dev,
+ char *page)
+{
+ struct se_device *dev;
+ struct t10_pr_registration *pr_reg;
+ ssize_t len = 0;
+
+ dev = su_dev->se_dev_ptr;
+ if (!(dev))
+ return -ENODEV;
+
+ if (T10_RES(su_dev)->res_type != SPC3_PERSISTENT_RESERVATIONS)
+ return len;
+
+ spin_lock(&dev->dev_reservation_lock);
+ pr_reg = dev->dev_pr_res_holder;
+ if (!(pr_reg)) {
+ len = sprintf(page, "No SPC-3 Reservation holder\n");
+ spin_unlock(&dev->dev_reservation_lock);
+ return len;
+ }
+ len = sprintf(page, "SPC-3 Reservation Type: %s\n",
+ core_scsi3_pr_dump_type(pr_reg->pr_res_type));
+ spin_unlock(&dev->dev_reservation_lock);
+
+ return len;
+}
+
+SE_DEV_PR_ATTR_RO(res_pr_type);
+
+/*
+ * res_type
+ */
+static ssize_t target_core_dev_pr_show_attr_res_type(
+ struct se_subsystem_dev *su_dev,
+ char *page)
+{
+ ssize_t len = 0;
+
+ if (!(su_dev->se_dev_ptr))
+ return -ENODEV;
+
+ switch (T10_RES(su_dev)->res_type) {
+ case SPC3_PERSISTENT_RESERVATIONS:
+ len = sprintf(page, "SPC3_PERSISTENT_RESERVATIONS\n");
+ break;
+ case SPC2_RESERVATIONS:
+ len = sprintf(page, "SPC2_RESERVATIONS\n");
+ break;
+ case SPC_PASSTHROUGH:
+ len = sprintf(page, "SPC_PASSTHROUGH\n");
+ break;
+ default:
+ len = sprintf(page, "UNKNOWN\n");
+ break;
+ }
+
+ return len;
+}
+
+SE_DEV_PR_ATTR_RO(res_type);
+
+/*
+ * res_aptpl_active
+ */
+
+static ssize_t target_core_dev_pr_show_attr_res_aptpl_active(
+ struct se_subsystem_dev *su_dev,
+ char *page)
+{
+ if (!(su_dev->se_dev_ptr))
+ return -ENODEV;
+
+ if (T10_RES(su_dev)->res_type != SPC3_PERSISTENT_RESERVATIONS)
+ return 0;
+
+ return sprintf(page, "APTPL Bit Status: %s\n",
+ (T10_RES(su_dev)->pr_aptpl_active) ? "Activated" : "Disabled");
+}
+
+SE_DEV_PR_ATTR_RO(res_aptpl_active);
+
+/*
+ * res_aptpl_metadata
+ */
+static ssize_t target_core_dev_pr_show_attr_res_aptpl_metadata(
+ struct se_subsystem_dev *su_dev,
+ char *page)
+{
+ if (!(su_dev->se_dev_ptr))
+ return -ENODEV;
+
+ if (T10_RES(su_dev)->res_type != SPC3_PERSISTENT_RESERVATIONS)
+ return 0;
+
+ return sprintf(page, "Ready to process PR APTPL metadata..\n");
+}
+
+enum {
+ Opt_initiator_fabric, Opt_initiator_node, Opt_initiator_sid,
+ Opt_sa_res_key, Opt_res_holder, Opt_res_type, Opt_res_scope,
+ Opt_res_all_tg_pt, Opt_mapped_lun, Opt_target_fabric,
+ Opt_target_node, Opt_tpgt, Opt_port_rtpi, Opt_target_lun, Opt_err
+};
+
+static match_table_t tokens = {
+ {Opt_initiator_fabric, "initiator_fabric=%s"},
+ {Opt_initiator_node, "initiator_node=%s"},
+ {Opt_initiator_sid, "initiator_sid=%s"},
+ {Opt_sa_res_key, "sa_res_key=%s"},
+ {Opt_res_holder, "res_holder=%d"},
+ {Opt_res_type, "res_type=%d"},
+ {Opt_res_scope, "res_scope=%d"},
+ {Opt_res_all_tg_pt, "res_all_tg_pt=%d"},
+ {Opt_mapped_lun, "mapped_lun=%d"},
+ {Opt_target_fabric, "target_fabric=%s"},
+ {Opt_target_node, "target_node=%s"},
+ {Opt_tpgt, "tpgt=%d"},
+ {Opt_port_rtpi, "port_rtpi=%d"},
+ {Opt_target_lun, "target_lun=%d"},
+ {Opt_err, NULL}
+};
+
+static ssize_t target_core_dev_pr_store_attr_res_aptpl_metadata(
+ struct se_subsystem_dev *su_dev,
+ const char *page,
+ size_t count)
+{
+ struct se_device *dev;
+ unsigned char *i_fabric, *t_fabric, *i_port = NULL, *t_port = NULL;
+ unsigned char *isid = NULL;
+ char *orig, *ptr, *arg_p, *opts;
+ substring_t args[MAX_OPT_ARGS];
+ unsigned long long tmp_ll;
+ u64 sa_res_key = 0;
+ u32 mapped_lun = 0, target_lun = 0;
+ int ret = -1, res_holder = 0, all_tg_pt = 0, arg, token;
+ u16 port_rpti = 0, tpgt = 0;
+ u8 type = 0, scope;
+
+ dev = su_dev->se_dev_ptr;
+ if (!(dev))
+ return -ENODEV;
+
+ if (T10_RES(su_dev)->res_type != SPC3_PERSISTENT_RESERVATIONS)
+ return 0;
+
+ if (atomic_read(&dev->dev_export_obj.obj_access_count)) {
+ printk(KERN_INFO "Unable to process APTPL metadata while"
+ " active fabric exports exist\n");
+ return -EINVAL;
+ }
+
+ opts = kstrdup(page, GFP_KERNEL);
+ if (!opts)
+ return -ENOMEM;
+
+ orig = opts;
+ while ((ptr = strsep(&opts, ",")) != NULL) {
+ if (!*ptr)
+ continue;
+
+ token = match_token(ptr, tokens, args);
+ switch (token) {
+ case Opt_initiator_fabric:
+ i_fabric = match_strdup(&args[0]);
+ break;
+ case Opt_initiator_node:
+ i_port = match_strdup(&args[0]);
+ if (strlen(i_port) > PR_APTPL_MAX_IPORT_LEN) {
+ printk(KERN_ERR "APTPL metadata initiator_node="
+ " exceeds PR_APTPL_MAX_IPORT_LEN: %d\n",
+ PR_APTPL_MAX_IPORT_LEN);
+ ret = -EINVAL;
+ break;
+ }
+ break;
+ case Opt_initiator_sid:
+ isid = match_strdup(&args[0]);
+ if (strlen(isid) > PR_REG_ISID_LEN) {
+ printk(KERN_ERR "APTPL metadata initiator_isid"
+ "= exceeds PR_REG_ISID_LEN: %d\n",
+ PR_REG_ISID_LEN);
+ ret = -EINVAL;
+ break;
+ }
+ break;
+ case Opt_sa_res_key:
+ arg_p = match_strdup(&args[0]);
+ ret = strict_strtoull(arg_p, 0, &tmp_ll);
+ if (ret < 0) {
+ printk(KERN_ERR "strict_strtoull() failed for"
+ " sa_res_key=\n");
+ goto out;
+ }
+ sa_res_key = (u64)tmp_ll;
+ break;
+ /*
+ * PR APTPL Metadata for Reservation
+ */
+ case Opt_res_holder:
+ match_int(args, &arg);
+ res_holder = arg;
+ break;
+ case Opt_res_type:
+ match_int(args, &arg);
+ type = (u8)arg;
+ break;
+ case Opt_res_scope:
+ match_int(args, &arg);
+ scope = (u8)arg;
+ break;
+ case Opt_res_all_tg_pt:
+ match_int(args, &arg);
+ all_tg_pt = (int)arg;
+ break;
+ case Opt_mapped_lun:
+ match_int(args, &arg);
+ mapped_lun = (u32)arg;
+ break;
+ /*
+ * PR APTPL Metadata for Target Port
+ */
+ case Opt_target_fabric:
+ t_fabric = match_strdup(&args[0]);
+ break;
+ case Opt_target_node:
+ t_port = match_strdup(&args[0]);
+ if (strlen(t_port) > PR_APTPL_MAX_TPORT_LEN) {
+ printk(KERN_ERR "APTPL metadata target_node="
+ " exceeds PR_APTPL_MAX_TPORT_LEN: %d\n",
+ PR_APTPL_MAX_TPORT_LEN);
+ ret = -EINVAL;
+ break;
+ }
+ break;
+ case Opt_tpgt:
+ match_int(args, &arg);
+ tpgt = (u16)arg;
+ break;
+ case Opt_port_rtpi:
+ match_int(args, &arg);
+ port_rpti = (u16)arg;
+ break;
+ case Opt_target_lun:
+ match_int(args, &arg);
+ target_lun = (u32)arg;
+ break;
+ default:
+ break;
+ }
+ }
+
+ if (!(i_port) || !(t_port) || !(sa_res_key)) {
+ printk(KERN_ERR "Illegal parameters for APTPL registration\n");
+ ret = -EINVAL;
+ goto out;
+ }
+
+ if (res_holder && !(type)) {
+ printk(KERN_ERR "Illegal PR type: 0x%02x for reservation"
+ " holder\n", type);
+ ret = -EINVAL;
+ goto out;
+ }
+
+ ret = core_scsi3_alloc_aptpl_registration(T10_RES(su_dev), sa_res_key,
+ i_port, isid, mapped_lun, t_port, tpgt, target_lun,
+ res_holder, all_tg_pt, type);
+out:
+ kfree(orig);
+ return (ret == 0) ? count : ret;
+}
+
+SE_DEV_PR_ATTR(res_aptpl_metadata, S_IRUGO | S_IWUSR);
+
+CONFIGFS_EATTR_OPS(target_core_dev_pr, se_subsystem_dev, se_dev_pr_group);
+
+static struct configfs_attribute *target_core_dev_pr_attrs[] = {
+ &target_core_dev_pr_res_holder.attr,
+ &target_core_dev_pr_res_pr_all_tgt_pts.attr,
+ &target_core_dev_pr_res_pr_generation.attr,
+ &target_core_dev_pr_res_pr_holder_tg_port.attr,
+ &target_core_dev_pr_res_pr_registered_i_pts.attr,
+ &target_core_dev_pr_res_pr_type.attr,
+ &target_core_dev_pr_res_type.attr,
+ &target_core_dev_pr_res_aptpl_active.attr,
+ &target_core_dev_pr_res_aptpl_metadata.attr,
+ NULL,
+};
+
+static struct configfs_item_operations target_core_dev_pr_ops = {
+ .show_attribute = target_core_dev_pr_attr_show,
+ .store_attribute = target_core_dev_pr_attr_store,
+};
+
+static struct config_item_type target_core_dev_pr_cit = {
+ .ct_item_ops = &target_core_dev_pr_ops,
+ .ct_attrs = target_core_dev_pr_attrs,
+ .ct_owner = THIS_MODULE,
+};
+
+/* End functions for struct config_item_type target_core_dev_pr_cit */
+
+/* Start functions for struct config_item_type target_core_dev_cit */
+
+static ssize_t target_core_show_dev_info(void *p, char *page)
+{
+ struct se_subsystem_dev *se_dev = (struct se_subsystem_dev *)p;
+ struct se_hba *hba = se_dev->se_dev_hba;
+ struct se_subsystem_api *t = hba->transport;
+ int bl = 0;
+ ssize_t read_bytes = 0;
+
+ if (!(se_dev->se_dev_ptr))
+ return -ENODEV;
+
+ transport_dump_dev_state(se_dev->se_dev_ptr, page, &bl);
+ read_bytes += bl;
+ read_bytes += t->show_configfs_dev_params(hba, se_dev, page+read_bytes);
+ return read_bytes;
+}
+
+static struct target_core_configfs_attribute target_core_attr_dev_info = {
+ .attr = { .ca_owner = THIS_MODULE,
+ .ca_name = "info",
+ .ca_mode = S_IRUGO },
+ .show = target_core_show_dev_info,
+ .store = NULL,
+};
+
+static ssize_t target_core_store_dev_control(
+ void *p,
+ const char *page,
+ size_t count)
+{
+ struct se_subsystem_dev *se_dev = (struct se_subsystem_dev *)p;
+ struct se_hba *hba = se_dev->se_dev_hba;
+ struct se_subsystem_api *t = hba->transport;
+
+ if (!(se_dev->se_dev_su_ptr)) {
+ printk(KERN_ERR "Unable to locate struct se_subsystem_dev>se"
+ "_dev_su_ptr\n");
+ return -EINVAL;
+ }
+
+ return t->set_configfs_dev_params(hba, se_dev, page, count);
+}
+
+static struct target_core_configfs_attribute target_core_attr_dev_control = {
+ .attr = { .ca_owner = THIS_MODULE,
+ .ca_name = "control",
+ .ca_mode = S_IWUSR },
+ .show = NULL,
+ .store = target_core_store_dev_control,
+};
+
+static ssize_t target_core_show_dev_alias(void *p, char *page)
+{
+ struct se_subsystem_dev *se_dev = (struct se_subsystem_dev *)p;
+
+ if (!(se_dev->su_dev_flags & SDF_USING_ALIAS))
+ return 0;
+
+ return snprintf(page, PAGE_SIZE, "%s\n", se_dev->se_dev_alias);
+}
+
+static ssize_t target_core_store_dev_alias(
+ void *p,
+ const char *page,
+ size_t count)
+{
+ struct se_subsystem_dev *se_dev = (struct se_subsystem_dev *)p;
+ struct se_hba *hba = se_dev->se_dev_hba;
+ ssize_t read_bytes;
+
+ if (count > (SE_DEV_ALIAS_LEN-1)) {
+ printk(KERN_ERR "alias count: %d exceeds"
+ " SE_DEV_ALIAS_LEN-1: %u\n", (int)count,
+ SE_DEV_ALIAS_LEN-1);
+ return -EINVAL;
+ }
+
+ se_dev->su_dev_flags |= SDF_USING_ALIAS;
+ read_bytes = snprintf(&se_dev->se_dev_alias[0], SE_DEV_ALIAS_LEN,
+ "%s", page);
+
+ printk(KERN_INFO "Target_Core_ConfigFS: %s/%s set alias: %s\n",
+ config_item_name(&hba->hba_group.cg_item),
+ config_item_name(&se_dev->se_dev_group.cg_item),
+ se_dev->se_dev_alias);
+
+ return read_bytes;
+}
+
+static struct target_core_configfs_attribute target_core_attr_dev_alias = {
+ .attr = { .ca_owner = THIS_MODULE,
+ .ca_name = "alias",
+ .ca_mode = S_IRUGO | S_IWUSR },
+ .show = target_core_show_dev_alias,
+ .store = target_core_store_dev_alias,
+};
+
+static ssize_t target_core_show_dev_udev_path(void *p, char *page)
+{
+ struct se_subsystem_dev *se_dev = (struct se_subsystem_dev *)p;
+
+ if (!(se_dev->su_dev_flags & SDF_USING_UDEV_PATH))
+ return 0;
+
+ return snprintf(page, PAGE_SIZE, "%s\n", se_dev->se_dev_udev_path);
+}
+
+static ssize_t target_core_store_dev_udev_path(
+ void *p,
+ const char *page,
+ size_t count)
+{
+ struct se_subsystem_dev *se_dev = (struct se_subsystem_dev *)p;
+ struct se_hba *hba = se_dev->se_dev_hba;
+ ssize_t read_bytes;
+
+ if (count > (SE_UDEV_PATH_LEN-1)) {
+ printk(KERN_ERR "udev_path count: %d exceeds"
+ " SE_UDEV_PATH_LEN-1: %u\n", (int)count,
+ SE_UDEV_PATH_LEN-1);
+ return -EINVAL;
+ }
+
+ se_dev->su_dev_flags |= SDF_USING_UDEV_PATH;
+ read_bytes = snprintf(&se_dev->se_dev_udev_path[0], SE_UDEV_PATH_LEN,
+ "%s", page);
+
+ printk(KERN_INFO "Target_Core_ConfigFS: %s/%s set udev_path: %s\n",
+ config_item_name(&hba->hba_group.cg_item),
+ config_item_name(&se_dev->se_dev_group.cg_item),
+ se_dev->se_dev_udev_path);
+
+ return read_bytes;
+}
+
+static struct target_core_configfs_attribute target_core_attr_dev_udev_path = {
+ .attr = { .ca_owner = THIS_MODULE,
+ .ca_name = "udev_path",
+ .ca_mode = S_IRUGO | S_IWUSR },
+ .show = target_core_show_dev_udev_path,
+ .store = target_core_store_dev_udev_path,
+};
+
+static ssize_t target_core_store_dev_enable(
+ void *p,
+ const char *page,
+ size_t count)
+{
+ struct se_subsystem_dev *se_dev = (struct se_subsystem_dev *)p;
+ struct se_device *dev;
+ struct se_hba *hba = se_dev->se_dev_hba;
+ struct se_subsystem_api *t = hba->transport;
+ char *ptr;
+
+ ptr = strstr(page, "1");
+ if (!(ptr)) {
+ printk(KERN_ERR "For dev_enable ops, only valid value"
+ " is \"1\"\n");
+ return -EINVAL;
+ }
+ if ((se_dev->se_dev_ptr)) {
+ printk(KERN_ERR "se_dev->se_dev_ptr already set for storage"
+ " object\n");
+ return -EEXIST;
+ }
+
+ if (t->check_configfs_dev_params(hba, se_dev) < 0)
+ return -EINVAL;
+
+ dev = t->create_virtdevice(hba, se_dev, se_dev->se_dev_su_ptr);
+ if (!(dev) || IS_ERR(dev))
+ return -EINVAL;
+
+ se_dev->se_dev_ptr = dev;
+ printk(KERN_INFO "Target_Core_ConfigFS: Registered se_dev->se_dev_ptr:"
+ " %p\n", se_dev->se_dev_ptr);
+
+ return count;
+}
+
+static struct target_core_configfs_attribute target_core_attr_dev_enable = {
+ .attr = { .ca_owner = THIS_MODULE,
+ .ca_name = "enable",
+ .ca_mode = S_IWUSR },
+ .show = NULL,
+ .store = target_core_store_dev_enable,
+};
+
+static ssize_t target_core_show_alua_lu_gp(void *p, char *page)
+{
+ struct se_device *dev;
+ struct se_subsystem_dev *su_dev = (struct se_subsystem_dev *)p;
+ struct config_item *lu_ci;
+ struct t10_alua_lu_gp *lu_gp;
+ struct t10_alua_lu_gp_member *lu_gp_mem;
+ ssize_t len = 0;
+
+ dev = su_dev->se_dev_ptr;
+ if (!(dev))
+ return -ENODEV;
+
+ if (T10_ALUA(su_dev)->alua_type != SPC3_ALUA_EMULATED)
+ return len;
+
+ lu_gp_mem = dev->dev_alua_lu_gp_mem;
+ if (!(lu_gp_mem)) {
+ printk(KERN_ERR "NULL struct se_device->dev_alua_lu_gp_mem"
+ " pointer\n");
+ return -EINVAL;
+ }
+
+ spin_lock(&lu_gp_mem->lu_gp_mem_lock);
+ lu_gp = lu_gp_mem->lu_gp;
+ if ((lu_gp)) {
+ lu_ci = &lu_gp->lu_gp_group.cg_item;
+ len += sprintf(page, "LU Group Alias: %s\nLU Group ID: %hu\n",
+ config_item_name(lu_ci), lu_gp->lu_gp_id);
+ }
+ spin_unlock(&lu_gp_mem->lu_gp_mem_lock);
+
+ return len;
+}
+
+static ssize_t target_core_store_alua_lu_gp(
+ void *p,
+ const char *page,
+ size_t count)
+{
+ struct se_device *dev;
+ struct se_subsystem_dev *su_dev = (struct se_subsystem_dev *)p;
+ struct se_hba *hba = su_dev->se_dev_hba;
+ struct t10_alua_lu_gp *lu_gp = NULL, *lu_gp_new = NULL;
+ struct t10_alua_lu_gp_member *lu_gp_mem;
+ unsigned char buf[LU_GROUP_NAME_BUF];
+ int move = 0;
+
+ dev = su_dev->se_dev_ptr;
+ if (!(dev))
+ return -ENODEV;
+
+ if (T10_ALUA(su_dev)->alua_type != SPC3_ALUA_EMULATED) {
+ printk(KERN_WARNING "SPC3_ALUA_EMULATED not enabled for %s/%s\n",
+ config_item_name(&hba->hba_group.cg_item),
+ config_item_name(&su_dev->se_dev_group.cg_item));
+ return -EINVAL;
+ }
+ if (count > LU_GROUP_NAME_BUF) {
+ printk(KERN_ERR "ALUA LU Group Alias too large!\n");
+ return -EINVAL;
+ }
+ memset(buf, 0, LU_GROUP_NAME_BUF);
+ memcpy(buf, page, count);
+ /*
+ * Any ALUA logical unit alias besides "NULL" means we will be
+ * making a new group association.
+ */
+ if (strcmp(strstrip(buf), "NULL")) {
+ /*
+ * core_alua_get_lu_gp_by_name() will increment reference to
+ * struct t10_alua_lu_gp. This reference is released with
+ * core_alua_get_lu_gp_by_name below().
+ */
+ lu_gp_new = core_alua_get_lu_gp_by_name(strstrip(buf));
+ if (!(lu_gp_new))
+ return -ENODEV;
+ }
+ lu_gp_mem = dev->dev_alua_lu_gp_mem;
+ if (!(lu_gp_mem)) {
+ if (lu_gp_new)
+ core_alua_put_lu_gp_from_name(lu_gp_new);
+ printk(KERN_ERR "NULL struct se_device->dev_alua_lu_gp_mem"
+ " pointer\n");
+ return -EINVAL;
+ }
+
+ spin_lock(&lu_gp_mem->lu_gp_mem_lock);
+ lu_gp = lu_gp_mem->lu_gp;
+ if ((lu_gp)) {
+ /*
+ * Clearing an existing lu_gp association, and replacing
+ * with NULL
+ */
+ if (!(lu_gp_new)) {
+ printk(KERN_INFO "Target_Core_ConfigFS: Releasing %s/%s"
+ " from ALUA LU Group: core/alua/lu_gps/%s, ID:"
+ " %hu\n",
+ config_item_name(&hba->hba_group.cg_item),
+ config_item_name(&su_dev->se_dev_group.cg_item),
+ config_item_name(&lu_gp->lu_gp_group.cg_item),
+ lu_gp->lu_gp_id);
+
+ __core_alua_drop_lu_gp_mem(lu_gp_mem, lu_gp);
+ spin_unlock(&lu_gp_mem->lu_gp_mem_lock);
+
+ return count;
+ }
+ /*
+ * Removing existing association of lu_gp_mem with lu_gp
+ */
+ __core_alua_drop_lu_gp_mem(lu_gp_mem, lu_gp);
+ move = 1;
+ }
+ /*
+ * Associate lu_gp_mem with lu_gp_new.
+ */
+ __core_alua_attach_lu_gp_mem(lu_gp_mem, lu_gp_new);
+ spin_unlock(&lu_gp_mem->lu_gp_mem_lock);
+
+ printk(KERN_INFO "Target_Core_ConfigFS: %s %s/%s to ALUA LU Group:"
+ " core/alua/lu_gps/%s, ID: %hu\n",
+ (move) ? "Moving" : "Adding",
+ config_item_name(&hba->hba_group.cg_item),
+ config_item_name(&su_dev->se_dev_group.cg_item),
+ config_item_name(&lu_gp_new->lu_gp_group.cg_item),
+ lu_gp_new->lu_gp_id);
+
+ core_alua_put_lu_gp_from_name(lu_gp_new);
+ return count;
+}
+
+static struct target_core_configfs_attribute target_core_attr_dev_alua_lu_gp = {
+ .attr = { .ca_owner = THIS_MODULE,
+ .ca_name = "alua_lu_gp",
+ .ca_mode = S_IRUGO | S_IWUSR },
+ .show = target_core_show_alua_lu_gp,
+ .store = target_core_store_alua_lu_gp,
+};
+
+static struct configfs_attribute *lio_core_dev_attrs[] = {
+ &target_core_attr_dev_info.attr,
+ &target_core_attr_dev_control.attr,
+ &target_core_attr_dev_alias.attr,
+ &target_core_attr_dev_udev_path.attr,
+ &target_core_attr_dev_enable.attr,
+ &target_core_attr_dev_alua_lu_gp.attr,
+ NULL,
+};
+
+static void target_core_dev_release(struct config_item *item)
+{
+ struct se_subsystem_dev *se_dev = container_of(to_config_group(item),
+ struct se_subsystem_dev, se_dev_group);
+ struct config_group *dev_cg;
+
+ if (!(se_dev))
+ return;
+
+ dev_cg = &se_dev->se_dev_group;
+ kfree(dev_cg->default_groups);
+}
+
+static ssize_t target_core_dev_show(struct config_item *item,
+ struct configfs_attribute *attr,
+ char *page)
+{
+ struct se_subsystem_dev *se_dev = container_of(
+ to_config_group(item), struct se_subsystem_dev,
+ se_dev_group);
+ struct target_core_configfs_attribute *tc_attr = container_of(
+ attr, struct target_core_configfs_attribute, attr);
+
+ if (!(tc_attr->show))
+ return -EINVAL;
+
+ return tc_attr->show((void *)se_dev, page);
+}
+
+static ssize_t target_core_dev_store(struct config_item *item,
+ struct configfs_attribute *attr,
+ const char *page, size_t count)
+{
+ struct se_subsystem_dev *se_dev = container_of(
+ to_config_group(item), struct se_subsystem_dev,
+ se_dev_group);
+ struct target_core_configfs_attribute *tc_attr = container_of(
+ attr, struct target_core_configfs_attribute, attr);
+
+ if (!(tc_attr->store))
+ return -EINVAL;
+
+ return tc_attr->store((void *)se_dev, page, count);
+}
+
+static struct configfs_item_operations target_core_dev_item_ops = {
+ .release = target_core_dev_release,
+ .show_attribute = target_core_dev_show,
+ .store_attribute = target_core_dev_store,
+};
+
+static struct config_item_type target_core_dev_cit = {
+ .ct_item_ops = &target_core_dev_item_ops,
+ .ct_attrs = lio_core_dev_attrs,
+ .ct_owner = THIS_MODULE,
+};
+
+/* End functions for struct config_item_type target_core_dev_cit */
+
+/* Start functions for struct config_item_type target_core_alua_lu_gp_cit */
+
+CONFIGFS_EATTR_STRUCT(target_core_alua_lu_gp, t10_alua_lu_gp);
+#define SE_DEV_ALUA_LU_ATTR(_name, _mode) \
+static struct target_core_alua_lu_gp_attribute \
+ target_core_alua_lu_gp_##_name = \
+ __CONFIGFS_EATTR(_name, _mode, \
+ target_core_alua_lu_gp_show_attr_##_name, \
+ target_core_alua_lu_gp_store_attr_##_name);
+
+#define SE_DEV_ALUA_LU_ATTR_RO(_name) \
+static struct target_core_alua_lu_gp_attribute \
+ target_core_alua_lu_gp_##_name = \
+ __CONFIGFS_EATTR_RO(_name, \
+ target_core_alua_lu_gp_show_attr_##_name);
+
+/*
+ * lu_gp_id
+ */
+static ssize_t target_core_alua_lu_gp_show_attr_lu_gp_id(
+ struct t10_alua_lu_gp *lu_gp,
+ char *page)
+{
+ if (!(lu_gp->lu_gp_valid_id))
+ return 0;
+
+ return sprintf(page, "%hu\n", lu_gp->lu_gp_id);
+}
+
+static ssize_t target_core_alua_lu_gp_store_attr_lu_gp_id(
+ struct t10_alua_lu_gp *lu_gp,
+ const char *page,
+ size_t count)
+{
+ struct config_group *alua_lu_gp_cg = &lu_gp->lu_gp_group;
+ unsigned long lu_gp_id;
+ int ret;
+
+ ret = strict_strtoul(page, 0, &lu_gp_id);
+ if (ret < 0) {
+ printk(KERN_ERR "strict_strtoul() returned %d for"
+ " lu_gp_id\n", ret);
+ return -EINVAL;
+ }
+ if (lu_gp_id > 0x0000ffff) {
+ printk(KERN_ERR "ALUA lu_gp_id: %lu exceeds maximum:"
+ " 0x0000ffff\n", lu_gp_id);
+ return -EINVAL;
+ }
+
+ ret = core_alua_set_lu_gp_id(lu_gp, (u16)lu_gp_id);
+ if (ret < 0)
+ return -EINVAL;
+
+ printk(KERN_INFO "Target_Core_ConfigFS: Set ALUA Logical Unit"
+ " Group: core/alua/lu_gps/%s to ID: %hu\n",
+ config_item_name(&alua_lu_gp_cg->cg_item),
+ lu_gp->lu_gp_id);
+
+ return count;
+}
+
+SE_DEV_ALUA_LU_ATTR(lu_gp_id, S_IRUGO | S_IWUSR);
+
+/*
+ * members
+ */
+static ssize_t target_core_alua_lu_gp_show_attr_members(
+ struct t10_alua_lu_gp *lu_gp,
+ char *page)
+{
+ struct se_device *dev;
+ struct se_hba *hba;
+ struct se_subsystem_dev *su_dev;
+ struct t10_alua_lu_gp_member *lu_gp_mem;
+ ssize_t len = 0, cur_len;
+ unsigned char buf[LU_GROUP_NAME_BUF];
+
+ memset(buf, 0, LU_GROUP_NAME_BUF);
+
+ spin_lock(&lu_gp->lu_gp_lock);
+ list_for_each_entry(lu_gp_mem, &lu_gp->lu_gp_mem_list, lu_gp_mem_list) {
+ dev = lu_gp_mem->lu_gp_mem_dev;
+ su_dev = dev->se_sub_dev;
+ hba = su_dev->se_dev_hba;
+
+ cur_len = snprintf(buf, LU_GROUP_NAME_BUF, "%s/%s\n",
+ config_item_name(&hba->hba_group.cg_item),
+ config_item_name(&su_dev->se_dev_group.cg_item));
+ cur_len++; /* Extra byte for NULL terminator */
+
+ if ((cur_len + len) > PAGE_SIZE) {
+ printk(KERN_WARNING "Ran out of lu_gp_show_attr"
+ "_members buffer\n");
+ break;
+ }
+ memcpy(page+len, buf, cur_len);
+ len += cur_len;
+ }
+ spin_unlock(&lu_gp->lu_gp_lock);
+
+ return len;
+}
+
+SE_DEV_ALUA_LU_ATTR_RO(members);
+
+CONFIGFS_EATTR_OPS(target_core_alua_lu_gp, t10_alua_lu_gp, lu_gp_group);
+
+static struct configfs_attribute *target_core_alua_lu_gp_attrs[] = {
+ &target_core_alua_lu_gp_lu_gp_id.attr,
+ &target_core_alua_lu_gp_members.attr,
+ NULL,
+};
+
+static struct configfs_item_operations target_core_alua_lu_gp_ops = {
+ .show_attribute = target_core_alua_lu_gp_attr_show,
+ .store_attribute = target_core_alua_lu_gp_attr_store,
+};
+
+static struct config_item_type target_core_alua_lu_gp_cit = {
+ .ct_item_ops = &target_core_alua_lu_gp_ops,
+ .ct_attrs = target_core_alua_lu_gp_attrs,
+ .ct_owner = THIS_MODULE,
+};
+
+/* End functions for struct config_item_type target_core_alua_lu_gp_cit */
+
+/* Start functions for struct config_item_type target_core_alua_lu_gps_cit */
+
+static struct config_group *target_core_alua_create_lu_gp(
+ struct config_group *group,
+ const char *name)
+{
+ struct t10_alua_lu_gp *lu_gp;
+ struct config_group *alua_lu_gp_cg = NULL;
+ struct config_item *alua_lu_gp_ci = NULL;
+
+ lu_gp = core_alua_allocate_lu_gp(name, 0);
+ if (IS_ERR(lu_gp))
+ return NULL;
+
+ alua_lu_gp_cg = &lu_gp->lu_gp_group;
+ alua_lu_gp_ci = &alua_lu_gp_cg->cg_item;
+
+ config_group_init_type_name(alua_lu_gp_cg, name,
+ &target_core_alua_lu_gp_cit);
+
+ printk(KERN_INFO "Target_Core_ConfigFS: Allocated ALUA Logical Unit"
+ " Group: core/alua/lu_gps/%s\n",
+ config_item_name(alua_lu_gp_ci));
+
+ return alua_lu_gp_cg;
+
+}
+
+static void target_core_alua_drop_lu_gp(
+ struct config_group *group,
+ struct config_item *item)
+{
+ struct t10_alua_lu_gp *lu_gp = container_of(to_config_group(item),
+ struct t10_alua_lu_gp, lu_gp_group);
+
+ printk(KERN_INFO "Target_Core_ConfigFS: Releasing ALUA Logical Unit"
+ " Group: core/alua/lu_gps/%s, ID: %hu\n",
+ config_item_name(item), lu_gp->lu_gp_id);
+
+ config_item_put(item);
+ core_alua_free_lu_gp(lu_gp);
+}
+
+static struct configfs_group_operations target_core_alua_lu_gps_group_ops = {
+ .make_group = &target_core_alua_create_lu_gp,
+ .drop_item = &target_core_alua_drop_lu_gp,
+};
+
+static struct config_item_type target_core_alua_lu_gps_cit = {
+ .ct_item_ops = NULL,
+ .ct_group_ops = &target_core_alua_lu_gps_group_ops,
+ .ct_owner = THIS_MODULE,
+};
+
+/* End functions for struct config_item_type target_core_alua_lu_gps_cit */
+
+/* Start functions for struct config_item_type target_core_alua_tg_pt_gp_cit */
+
+CONFIGFS_EATTR_STRUCT(target_core_alua_tg_pt_gp, t10_alua_tg_pt_gp);
+#define SE_DEV_ALUA_TG_PT_ATTR(_name, _mode) \
+static struct target_core_alua_tg_pt_gp_attribute \
+ target_core_alua_tg_pt_gp_##_name = \
+ __CONFIGFS_EATTR(_name, _mode, \
+ target_core_alua_tg_pt_gp_show_attr_##_name, \
+ target_core_alua_tg_pt_gp_store_attr_##_name);
+
+#define SE_DEV_ALUA_TG_PT_ATTR_RO(_name) \
+static struct target_core_alua_tg_pt_gp_attribute \
+ target_core_alua_tg_pt_gp_##_name = \
+ __CONFIGFS_EATTR_RO(_name, \
+ target_core_alua_tg_pt_gp_show_attr_##_name);
+
+/*
+ * alua_access_state
+ */
+static ssize_t target_core_alua_tg_pt_gp_show_attr_alua_access_state(
+ struct t10_alua_tg_pt_gp *tg_pt_gp,
+ char *page)
+{
+ return sprintf(page, "%d\n",
+ atomic_read(&tg_pt_gp->tg_pt_gp_alua_access_state));
+}
+
+static ssize_t target_core_alua_tg_pt_gp_store_attr_alua_access_state(
+ struct t10_alua_tg_pt_gp *tg_pt_gp,
+ const char *page,
+ size_t count)
+{
+ struct se_subsystem_dev *su_dev = tg_pt_gp->tg_pt_gp_su_dev;
+ unsigned long tmp;
+ int new_state, ret;
+
+ if (!(tg_pt_gp->tg_pt_gp_valid_id)) {
+ printk(KERN_ERR "Unable to do implict ALUA on non valid"
+ " tg_pt_gp ID: %hu\n", tg_pt_gp->tg_pt_gp_valid_id);
+ return -EINVAL;
+ }
+
+ ret = strict_strtoul(page, 0, &tmp);
+ if (ret < 0) {
+ printk("Unable to extract new ALUA access state from"
+ " %s\n", page);
+ return -EINVAL;
+ }
+ new_state = (int)tmp;
+
+ if (!(tg_pt_gp->tg_pt_gp_alua_access_type & TPGS_IMPLICT_ALUA)) {
+ printk(KERN_ERR "Unable to process implict configfs ALUA"
+ " transition while TPGS_IMPLICT_ALUA is diabled\n");
+ return -EINVAL;
+ }
+
+ ret = core_alua_do_port_transition(tg_pt_gp, su_dev->se_dev_ptr,
+ NULL, NULL, new_state, 0);
+ return (!ret) ? count : -EINVAL;
+}
+
+SE_DEV_ALUA_TG_PT_ATTR(alua_access_state, S_IRUGO | S_IWUSR);
+
+/*
+ * alua_access_status
+ */
+static ssize_t target_core_alua_tg_pt_gp_show_attr_alua_access_status(
+ struct t10_alua_tg_pt_gp *tg_pt_gp,
+ char *page)
+{
+ return sprintf(page, "%s\n",
+ core_alua_dump_status(tg_pt_gp->tg_pt_gp_alua_access_status));
+}
+
+static ssize_t target_core_alua_tg_pt_gp_store_attr_alua_access_status(
+ struct t10_alua_tg_pt_gp *tg_pt_gp,
+ const char *page,
+ size_t count)
+{
+ unsigned long tmp;
+ int new_status, ret;
+
+ if (!(tg_pt_gp->tg_pt_gp_valid_id)) {
+ printk(KERN_ERR "Unable to do set ALUA access status on non"
+ " valid tg_pt_gp ID: %hu\n",
+ tg_pt_gp->tg_pt_gp_valid_id);
+ return -EINVAL;
+ }
+
+ ret = strict_strtoul(page, 0, &tmp);
+ if (ret < 0) {
+ printk(KERN_ERR "Unable to extract new ALUA access status"
+ " from %s\n", page);
+ return -EINVAL;
+ }
+ new_status = (int)tmp;
+
+ if ((new_status != ALUA_STATUS_NONE) &&
+ (new_status != ALUA_STATUS_ALTERED_BY_EXPLICT_STPG) &&
+ (new_status != ALUA_STATUS_ALTERED_BY_IMPLICT_ALUA)) {
+ printk(KERN_ERR "Illegal ALUA access status: 0x%02x\n",
+ new_status);
+ return -EINVAL;
+ }
+
+ tg_pt_gp->tg_pt_gp_alua_access_status = new_status;
+ return count;
+}
+
+SE_DEV_ALUA_TG_PT_ATTR(alua_access_status, S_IRUGO | S_IWUSR);
+
+/*
+ * alua_access_type
+ */
+static ssize_t target_core_alua_tg_pt_gp_show_attr_alua_access_type(
+ struct t10_alua_tg_pt_gp *tg_pt_gp,
+ char *page)
+{
+ return core_alua_show_access_type(tg_pt_gp, page);
+}
+
+static ssize_t target_core_alua_tg_pt_gp_store_attr_alua_access_type(
+ struct t10_alua_tg_pt_gp *tg_pt_gp,
+ const char *page,
+ size_t count)
+{
+ return core_alua_store_access_type(tg_pt_gp, page, count);
+}
+
+SE_DEV_ALUA_TG_PT_ATTR(alua_access_type, S_IRUGO | S_IWUSR);
+
+/*
+ * alua_write_metadata
+ */
+static ssize_t target_core_alua_tg_pt_gp_show_attr_alua_write_metadata(
+ struct t10_alua_tg_pt_gp *tg_pt_gp,
+ char *page)
+{
+ return sprintf(page, "%d\n", tg_pt_gp->tg_pt_gp_write_metadata);
+}
+
+static ssize_t target_core_alua_tg_pt_gp_store_attr_alua_write_metadata(
+ struct t10_alua_tg_pt_gp *tg_pt_gp,
+ const char *page,
+ size_t count)
+{
+ unsigned long tmp;
+ int ret;
+
+ ret = strict_strtoul(page, 0, &tmp);
+ if (ret < 0) {
+ printk(KERN_ERR "Unable to extract alua_write_metadata\n");
+ return -EINVAL;
+ }
+
+ if ((tmp != 0) && (tmp != 1)) {
+ printk(KERN_ERR "Illegal value for alua_write_metadata:"
+ " %lu\n", tmp);
+ return -EINVAL;
+ }
+ tg_pt_gp->tg_pt_gp_write_metadata = (int)tmp;
+
+ return count;
+}
+
+SE_DEV_ALUA_TG_PT_ATTR(alua_write_metadata, S_IRUGO | S_IWUSR);
+
+
+
+/*
+ * nonop_delay_msecs
+ */
+static ssize_t target_core_alua_tg_pt_gp_show_attr_nonop_delay_msecs(
+ struct t10_alua_tg_pt_gp *tg_pt_gp,
+ char *page)
+{
+ return core_alua_show_nonop_delay_msecs(tg_pt_gp, page);
+
+}
+
+static ssize_t target_core_alua_tg_pt_gp_store_attr_nonop_delay_msecs(
+ struct t10_alua_tg_pt_gp *tg_pt_gp,
+ const char *page,
+ size_t count)
+{
+ return core_alua_store_nonop_delay_msecs(tg_pt_gp, page, count);
+}
+
+SE_DEV_ALUA_TG_PT_ATTR(nonop_delay_msecs, S_IRUGO | S_IWUSR);
+
+/*
+ * trans_delay_msecs
+ */
+static ssize_t target_core_alua_tg_pt_gp_show_attr_trans_delay_msecs(
+ struct t10_alua_tg_pt_gp *tg_pt_gp,
+ char *page)
+{
+ return core_alua_show_trans_delay_msecs(tg_pt_gp, page);
+}
+
+static ssize_t target_core_alua_tg_pt_gp_store_attr_trans_delay_msecs(
+ struct t10_alua_tg_pt_gp *tg_pt_gp,
+ const char *page,
+ size_t count)
+{
+ return core_alua_store_trans_delay_msecs(tg_pt_gp, page, count);
+}
+
+SE_DEV_ALUA_TG_PT_ATTR(trans_delay_msecs, S_IRUGO | S_IWUSR);
+
+/*
+ * preferred
+ */
+
+static ssize_t target_core_alua_tg_pt_gp_show_attr_preferred(
+ struct t10_alua_tg_pt_gp *tg_pt_gp,
+ char *page)
+{
+ return core_alua_show_preferred_bit(tg_pt_gp, page);
+}
+
+static ssize_t target_core_alua_tg_pt_gp_store_attr_preferred(
+ struct t10_alua_tg_pt_gp *tg_pt_gp,
+ const char *page,
+ size_t count)
+{
+ return core_alua_store_preferred_bit(tg_pt_gp, page, count);
+}
+
+SE_DEV_ALUA_TG_PT_ATTR(preferred, S_IRUGO | S_IWUSR);
+
+/*
+ * tg_pt_gp_id
+ */
+static ssize_t target_core_alua_tg_pt_gp_show_attr_tg_pt_gp_id(
+ struct t10_alua_tg_pt_gp *tg_pt_gp,
+ char *page)
+{
+ if (!(tg_pt_gp->tg_pt_gp_valid_id))
+ return 0;
+
+ return sprintf(page, "%hu\n", tg_pt_gp->tg_pt_gp_id);
+}
+
+static ssize_t target_core_alua_tg_pt_gp_store_attr_tg_pt_gp_id(
+ struct t10_alua_tg_pt_gp *tg_pt_gp,
+ const char *page,
+ size_t count)
+{
+ struct config_group *alua_tg_pt_gp_cg = &tg_pt_gp->tg_pt_gp_group;
+ unsigned long tg_pt_gp_id;
+ int ret;
+
+ ret = strict_strtoul(page, 0, &tg_pt_gp_id);
+ if (ret < 0) {
+ printk(KERN_ERR "strict_strtoul() returned %d for"
+ " tg_pt_gp_id\n", ret);
+ return -EINVAL;
+ }
+ if (tg_pt_gp_id > 0x0000ffff) {
+ printk(KERN_ERR "ALUA tg_pt_gp_id: %lu exceeds maximum:"
+ " 0x0000ffff\n", tg_pt_gp_id);
+ return -EINVAL;
+ }
+
+ ret = core_alua_set_tg_pt_gp_id(tg_pt_gp, (u16)tg_pt_gp_id);
+ if (ret < 0)
+ return -EINVAL;
+
+ printk(KERN_INFO "Target_Core_ConfigFS: Set ALUA Target Port Group: "
+ "core/alua/tg_pt_gps/%s to ID: %hu\n",
+ config_item_name(&alua_tg_pt_gp_cg->cg_item),
+ tg_pt_gp->tg_pt_gp_id);
+
+ return count;
+}
+
+SE_DEV_ALUA_TG_PT_ATTR(tg_pt_gp_id, S_IRUGO | S_IWUSR);
+
+/*
+ * members
+ */
+static ssize_t target_core_alua_tg_pt_gp_show_attr_members(
+ struct t10_alua_tg_pt_gp *tg_pt_gp,
+ char *page)
+{
+ struct se_port *port;
+ struct se_portal_group *tpg;
+ struct se_lun *lun;
+ struct t10_alua_tg_pt_gp_member *tg_pt_gp_mem;
+ ssize_t len = 0, cur_len;
+ unsigned char buf[TG_PT_GROUP_NAME_BUF];
+
+ memset(buf, 0, TG_PT_GROUP_NAME_BUF);
+
+ spin_lock(&tg_pt_gp->tg_pt_gp_lock);
+ list_for_each_entry(tg_pt_gp_mem, &tg_pt_gp->tg_pt_gp_mem_list,
+ tg_pt_gp_mem_list) {
+ port = tg_pt_gp_mem->tg_pt;
+ tpg = port->sep_tpg;
+ lun = port->sep_lun;
+
+ cur_len = snprintf(buf, TG_PT_GROUP_NAME_BUF, "%s/%s/tpgt_%hu"
+ "/%s\n", TPG_TFO(tpg)->get_fabric_name(),
+ TPG_TFO(tpg)->tpg_get_wwn(tpg),
+ TPG_TFO(tpg)->tpg_get_tag(tpg),
+ config_item_name(&lun->lun_group.cg_item));
+ cur_len++; /* Extra byte for NULL terminator */
+
+ if ((cur_len + len) > PAGE_SIZE) {
+ printk(KERN_WARNING "Ran out of lu_gp_show_attr"
+ "_members buffer\n");
+ break;
+ }
+ memcpy(page+len, buf, cur_len);
+ len += cur_len;
+ }
+ spin_unlock(&tg_pt_gp->tg_pt_gp_lock);
+
+ return len;
+}
+
+SE_DEV_ALUA_TG_PT_ATTR_RO(members);
+
+CONFIGFS_EATTR_OPS(target_core_alua_tg_pt_gp, t10_alua_tg_pt_gp,
+ tg_pt_gp_group);
+
+static struct configfs_attribute *target_core_alua_tg_pt_gp_attrs[] = {
+ &target_core_alua_tg_pt_gp_alua_access_state.attr,
+ &target_core_alua_tg_pt_gp_alua_access_status.attr,
+ &target_core_alua_tg_pt_gp_alua_access_type.attr,
+ &target_core_alua_tg_pt_gp_alua_write_metadata.attr,
+ &target_core_alua_tg_pt_gp_nonop_delay_msecs.attr,
+ &target_core_alua_tg_pt_gp_trans_delay_msecs.attr,
+ &target_core_alua_tg_pt_gp_preferred.attr,
+ &target_core_alua_tg_pt_gp_tg_pt_gp_id.attr,
+ &target_core_alua_tg_pt_gp_members.attr,
+ NULL,
+};
+
+static struct configfs_item_operations target_core_alua_tg_pt_gp_ops = {
+ .show_attribute = target_core_alua_tg_pt_gp_attr_show,
+ .store_attribute = target_core_alua_tg_pt_gp_attr_store,
+};
+
+static struct config_item_type target_core_alua_tg_pt_gp_cit = {
+ .ct_item_ops = &target_core_alua_tg_pt_gp_ops,
+ .ct_attrs = target_core_alua_tg_pt_gp_attrs,
+ .ct_owner = THIS_MODULE,
+};
+
+/* End functions for struct config_item_type target_core_alua_tg_pt_gp_cit */
+
+/* Start functions for struct config_item_type target_core_alua_tg_pt_gps_cit */
+
+static struct config_group *target_core_alua_create_tg_pt_gp(
+ struct config_group *group,
+ const char *name)
+{
+ struct t10_alua *alua = container_of(group, struct t10_alua,
+ alua_tg_pt_gps_group);
+ struct t10_alua_tg_pt_gp *tg_pt_gp;
+ struct se_subsystem_dev *su_dev = alua->t10_sub_dev;
+ struct config_group *alua_tg_pt_gp_cg = NULL;
+ struct config_item *alua_tg_pt_gp_ci = NULL;
+
+ tg_pt_gp = core_alua_allocate_tg_pt_gp(su_dev, name, 0);
+ if (!(tg_pt_gp))
+ return NULL;
+
+ alua_tg_pt_gp_cg = &tg_pt_gp->tg_pt_gp_group;
+ alua_tg_pt_gp_ci = &alua_tg_pt_gp_cg->cg_item;
+
+ config_group_init_type_name(alua_tg_pt_gp_cg, name,
+ &target_core_alua_tg_pt_gp_cit);
+
+ printk(KERN_INFO "Target_Core_ConfigFS: Allocated ALUA Target Port"
+ " Group: alua/tg_pt_gps/%s\n",
+ config_item_name(alua_tg_pt_gp_ci));
+
+ return alua_tg_pt_gp_cg;
+}
+
+static void target_core_alua_drop_tg_pt_gp(
+ struct config_group *group,
+ struct config_item *item)
+{
+ struct t10_alua_tg_pt_gp *tg_pt_gp = container_of(to_config_group(item),
+ struct t10_alua_tg_pt_gp, tg_pt_gp_group);
+
+ printk(KERN_INFO "Target_Core_ConfigFS: Releasing ALUA Target Port"
+ " Group: alua/tg_pt_gps/%s, ID: %hu\n",
+ config_item_name(item), tg_pt_gp->tg_pt_gp_id);
+
+ config_item_put(item);
+ core_alua_free_tg_pt_gp(tg_pt_gp);
+}
+
+static struct configfs_group_operations target_core_alua_tg_pt_gps_group_ops = {
+ .make_group = &target_core_alua_create_tg_pt_gp,
+ .drop_item = &target_core_alua_drop_tg_pt_gp,
+};
+
+static struct config_item_type target_core_alua_tg_pt_gps_cit = {
+ .ct_group_ops = &target_core_alua_tg_pt_gps_group_ops,
+ .ct_owner = THIS_MODULE,
+};
+
+/* End functions for struct config_item_type target_core_alua_tg_pt_gps_cit */
+
+/* Start functions for struct config_item_type target_core_alua_cit */
+
+/*
+ * target_core_alua_cit is a ConfigFS group that lives under
+ * /sys/kernel/config/target/core/alua. There are default groups
+ * core/alua/lu_gps and core/alua/tg_pt_gps that are attached to
+ * target_core_alua_cit in target_core_init_configfs() below.
+ */
+static struct config_item_type target_core_alua_cit = {
+ .ct_item_ops = NULL,
+ .ct_attrs = NULL,
+ .ct_owner = THIS_MODULE,
+};
+
+/* End functions for struct config_item_type target_core_alua_cit */
+
+/* Start functions for struct config_item_type target_core_hba_cit */
+
+static struct config_group *target_core_make_subdev(
+ struct config_group *group,
+ const char *name)
+{
+ struct t10_alua_tg_pt_gp *tg_pt_gp;
+ struct se_subsystem_dev *se_dev;
+ struct se_subsystem_api *t;
+ struct config_item *hba_ci = &group->cg_item;
+ struct se_hba *hba = item_to_hba(hba_ci);
+ struct config_group *dev_cg = NULL, *tg_pt_gp_cg = NULL;
+
+ if (mutex_lock_interruptible(&hba->hba_access_mutex))
+ return NULL;
+
+ /*
+ * Locate the struct se_subsystem_api from parent's struct se_hba.
+ */
+ t = hba->transport;
+
+ se_dev = kzalloc(sizeof(struct se_subsystem_dev), GFP_KERNEL);
+ if (!se_dev) {
+ printk(KERN_ERR "Unable to allocate memory for"
+ " struct se_subsystem_dev\n");
+ goto unlock;
+ }
+ INIT_LIST_HEAD(&se_dev->g_se_dev_list);
+ INIT_LIST_HEAD(&se_dev->t10_wwn.t10_vpd_list);
+ spin_lock_init(&se_dev->t10_wwn.t10_vpd_lock);
+ INIT_LIST_HEAD(&se_dev->t10_reservation.registration_list);
+ INIT_LIST_HEAD(&se_dev->t10_reservation.aptpl_reg_list);
+ spin_lock_init(&se_dev->t10_reservation.registration_lock);
+ spin_lock_init(&se_dev->t10_reservation.aptpl_reg_lock);
+ INIT_LIST_HEAD(&se_dev->t10_alua.tg_pt_gps_list);
+ spin_lock_init(&se_dev->t10_alua.tg_pt_gps_lock);
+ spin_lock_init(&se_dev->se_dev_lock);
+ se_dev->t10_reservation.pr_aptpl_buf_len = PR_APTPL_BUF_LEN;
+ se_dev->t10_wwn.t10_sub_dev = se_dev;
+ se_dev->t10_alua.t10_sub_dev = se_dev;
+ se_dev->se_dev_attrib.da_sub_dev = se_dev;
+
+ se_dev->se_dev_hba = hba;
+ dev_cg = &se_dev->se_dev_group;
+
+ dev_cg->default_groups = kzalloc(sizeof(struct config_group) * 6,
+ GFP_KERNEL);
+ if (!(dev_cg->default_groups))
+ goto out;
+ /*
+ * Set se_dev_su_ptr from struct se_subsystem_api returned void ptr
+ * for ->allocate_virtdevice()
+ *
+ * se_dev->se_dev_ptr will be set after ->create_virtdev()
+ * has been called successfully in the next level up in the
+ * configfs tree for device object's struct config_group.
+ */
+ se_dev->se_dev_su_ptr = t->allocate_virtdevice(hba, name);
+ if (!(se_dev->se_dev_su_ptr)) {
+ printk(KERN_ERR "Unable to locate subsystem dependent pointer"
+ " from allocate_virtdevice()\n");
+ goto out;
+ }
+ spin_lock(&se_global->g_device_lock);
+ list_add_tail(&se_dev->g_se_dev_list, &se_global->g_se_dev_list);
+ spin_unlock(&se_global->g_device_lock);
+
+ config_group_init_type_name(&se_dev->se_dev_group, name,
+ &target_core_dev_cit);
+ config_group_init_type_name(&se_dev->se_dev_attrib.da_group, "attrib",
+ &target_core_dev_attrib_cit);
+ config_group_init_type_name(&se_dev->se_dev_pr_group, "pr",
+ &target_core_dev_pr_cit);
+ config_group_init_type_name(&se_dev->t10_wwn.t10_wwn_group, "wwn",
+ &target_core_dev_wwn_cit);
+ config_group_init_type_name(&se_dev->t10_alua.alua_tg_pt_gps_group,
+ "alua", &target_core_alua_tg_pt_gps_cit);
+ dev_cg->default_groups[0] = &se_dev->se_dev_attrib.da_group;
+ dev_cg->default_groups[1] = &se_dev->se_dev_pr_group;
+ dev_cg->default_groups[2] = &se_dev->t10_wwn.t10_wwn_group;
+ dev_cg->default_groups[3] = &se_dev->t10_alua.alua_tg_pt_gps_group;
+ dev_cg->default_groups[4] = NULL;
+ /*
+ * Add core/$HBA/$DEV/alua/tg_pt_gps/default_tg_pt_gp
+ */
+ tg_pt_gp = core_alua_allocate_tg_pt_gp(se_dev, "default_tg_pt_gp", 1);
+ if (!(tg_pt_gp))
+ goto out;
+
+ tg_pt_gp_cg = &T10_ALUA(se_dev)->alua_tg_pt_gps_group;
+ tg_pt_gp_cg->default_groups = kzalloc(sizeof(struct config_group) * 2,
+ GFP_KERNEL);
+ if (!(tg_pt_gp_cg->default_groups)) {
+ printk(KERN_ERR "Unable to allocate tg_pt_gp_cg->"
+ "default_groups\n");
+ goto out;
+ }
+
+ config_group_init_type_name(&tg_pt_gp->tg_pt_gp_group,
+ "default_tg_pt_gp", &target_core_alua_tg_pt_gp_cit);
+ tg_pt_gp_cg->default_groups[0] = &tg_pt_gp->tg_pt_gp_group;
+ tg_pt_gp_cg->default_groups[1] = NULL;
+ T10_ALUA(se_dev)->default_tg_pt_gp = tg_pt_gp;
+
+ printk(KERN_INFO "Target_Core_ConfigFS: Allocated struct se_subsystem_dev:"
+ " %p se_dev_su_ptr: %p\n", se_dev, se_dev->se_dev_su_ptr);
+
+ mutex_unlock(&hba->hba_access_mutex);
+ return &se_dev->se_dev_group;
+out:
+ if (T10_ALUA(se_dev)->default_tg_pt_gp) {
+ core_alua_free_tg_pt_gp(T10_ALUA(se_dev)->default_tg_pt_gp);
+ T10_ALUA(se_dev)->default_tg_pt_gp = NULL;
+ }
+ if (tg_pt_gp_cg)
+ kfree(tg_pt_gp_cg->default_groups);
+ if (dev_cg)
+ kfree(dev_cg->default_groups);
+ if (se_dev->se_dev_su_ptr)
+ t->free_device(se_dev->se_dev_su_ptr);
+ kfree(se_dev);
+unlock:
+ mutex_unlock(&hba->hba_access_mutex);
+ return NULL;
+}
+
+static void target_core_drop_subdev(
+ struct config_group *group,
+ struct config_item *item)
+{
+ struct se_subsystem_dev *se_dev = container_of(to_config_group(item),
+ struct se_subsystem_dev, se_dev_group);
+ struct se_hba *hba;
+ struct se_subsystem_api *t;
+ struct config_item *df_item;
+ struct config_group *dev_cg, *tg_pt_gp_cg;
+ int i, ret;
+
+ hba = item_to_hba(&se_dev->se_dev_hba->hba_group.cg_item);
+
+ if (mutex_lock_interruptible(&hba->hba_access_mutex))
+ goto out;
+
+ t = hba->transport;
+
+ spin_lock(&se_global->g_device_lock);
+ list_del(&se_dev->g_se_dev_list);
+ spin_unlock(&se_global->g_device_lock);
+
+ tg_pt_gp_cg = &T10_ALUA(se_dev)->alua_tg_pt_gps_group;
+ for (i = 0; tg_pt_gp_cg->default_groups[i]; i++) {
+ df_item = &tg_pt_gp_cg->default_groups[i]->cg_item;
+ tg_pt_gp_cg->default_groups[i] = NULL;
+ config_item_put(df_item);
+ }
+ kfree(tg_pt_gp_cg->default_groups);
+ core_alua_free_tg_pt_gp(T10_ALUA(se_dev)->default_tg_pt_gp);
+ T10_ALUA(se_dev)->default_tg_pt_gp = NULL;
+
+ dev_cg = &se_dev->se_dev_group;
+ for (i = 0; dev_cg->default_groups[i]; i++) {
+ df_item = &dev_cg->default_groups[i]->cg_item;
+ dev_cg->default_groups[i] = NULL;
+ config_item_put(df_item);
+ }
+
+ config_item_put(item);
+ /*
+ * This pointer will set when the storage is enabled with:
+ * `echo 1 > $CONFIGFS/core/$HBA/$DEV/dev_enable`
+ */
+ if (se_dev->se_dev_ptr) {
+ printk(KERN_INFO "Target_Core_ConfigFS: Calling se_free_"
+ "virtual_device() for se_dev_ptr: %p\n",
+ se_dev->se_dev_ptr);
+
+ ret = se_free_virtual_device(se_dev->se_dev_ptr, hba);
+ if (ret < 0)
+ goto hba_out;
+ } else {
+ /*
+ * Release struct se_subsystem_dev->se_dev_su_ptr..
+ */
+ printk(KERN_INFO "Target_Core_ConfigFS: Calling t->free_"
+ "device() for se_dev_su_ptr: %p\n",
+ se_dev->se_dev_su_ptr);
+
+ t->free_device(se_dev->se_dev_su_ptr);
+ }
+
+ printk(KERN_INFO "Target_Core_ConfigFS: Deallocating se_subsystem"
+ "_dev_t: %p\n", se_dev);
+
+hba_out:
+ mutex_unlock(&hba->hba_access_mutex);
+out:
+ kfree(se_dev);
+}
+
+static struct configfs_group_operations target_core_hba_group_ops = {
+ .make_group = target_core_make_subdev,
+ .drop_item = target_core_drop_subdev,
+};
+
+CONFIGFS_EATTR_STRUCT(target_core_hba, se_hba);
+#define SE_HBA_ATTR(_name, _mode) \
+static struct target_core_hba_attribute \
+ target_core_hba_##_name = \
+ __CONFIGFS_EATTR(_name, _mode, \
+ target_core_hba_show_attr_##_name, \
+ target_core_hba_store_attr_##_name);
+
+#define SE_HBA_ATTR_RO(_name) \
+static struct target_core_hba_attribute \
+ target_core_hba_##_name = \
+ __CONFIGFS_EATTR_RO(_name, \
+ target_core_hba_show_attr_##_name);
+
+static ssize_t target_core_hba_show_attr_hba_info(
+ struct se_hba *hba,
+ char *page)
+{
+ return sprintf(page, "HBA Index: %d plugin: %s version: %s\n",
+ hba->hba_id, hba->transport->name,
+ TARGET_CORE_CONFIGFS_VERSION);
+}
+
+SE_HBA_ATTR_RO(hba_info);
+
+static ssize_t target_core_hba_show_attr_hba_mode(struct se_hba *hba,
+ char *page)
+{
+ int hba_mode = 0;
+
+ if (hba->hba_flags & HBA_FLAGS_PSCSI_MODE)
+ hba_mode = 1;
+
+ return sprintf(page, "%d\n", hba_mode);
+}
+
+static ssize_t target_core_hba_store_attr_hba_mode(struct se_hba *hba,
+ const char *page, size_t count)
+{
+ struct se_subsystem_api *transport = hba->transport;
+ unsigned long mode_flag;
+ int ret;
+
+ if (transport->pmode_enable_hba == NULL)
+ return -EINVAL;
+
+ ret = strict_strtoul(page, 0, &mode_flag);
+ if (ret < 0) {
+ printk(KERN_ERR "Unable to extract hba mode flag: %d\n", ret);
+ return -EINVAL;
+ }
+
+ spin_lock(&hba->device_lock);
+ if (!(list_empty(&hba->hba_dev_list))) {
+ printk(KERN_ERR "Unable to set hba_mode with active devices\n");
+ spin_unlock(&hba->device_lock);
+ return -EINVAL;
+ }
+ spin_unlock(&hba->device_lock);
+
+ ret = transport->pmode_enable_hba(hba, mode_flag);
+ if (ret < 0)
+ return -EINVAL;
+ if (ret > 0)
+ hba->hba_flags |= HBA_FLAGS_PSCSI_MODE;
+ else if (ret == 0)
+ hba->hba_flags &= ~HBA_FLAGS_PSCSI_MODE;
+
+ return count;
+}
+
+SE_HBA_ATTR(hba_mode, S_IRUGO | S_IWUSR);
+
+CONFIGFS_EATTR_OPS(target_core_hba, se_hba, hba_group);
+
+static struct configfs_attribute *target_core_hba_attrs[] = {
+ &target_core_hba_hba_info.attr,
+ &target_core_hba_hba_mode.attr,
+ NULL,
+};
+
+static struct configfs_item_operations target_core_hba_item_ops = {
+ .show_attribute = target_core_hba_attr_show,
+ .store_attribute = target_core_hba_attr_store,
+};
+
+static struct config_item_type target_core_hba_cit = {
+ .ct_item_ops = &target_core_hba_item_ops,
+ .ct_group_ops = &target_core_hba_group_ops,
+ .ct_attrs = target_core_hba_attrs,
+ .ct_owner = THIS_MODULE,
+};
+
+static struct config_group *target_core_call_addhbatotarget(
+ struct config_group *group,
+ const char *name)
+{
+ char *se_plugin_str, *str, *str2;
+ struct se_hba *hba;
+ char buf[TARGET_CORE_NAME_MAX_LEN];
+ unsigned long plugin_dep_id = 0;
+ int ret;
+
+ memset(buf, 0, TARGET_CORE_NAME_MAX_LEN);
+ if (strlen(name) > TARGET_CORE_NAME_MAX_LEN) {
+ printk(KERN_ERR "Passed *name strlen(): %d exceeds"
+ " TARGET_CORE_NAME_MAX_LEN: %d\n", (int)strlen(name),
+ TARGET_CORE_NAME_MAX_LEN);
+ return ERR_PTR(-ENAMETOOLONG);
+ }
+ snprintf(buf, TARGET_CORE_NAME_MAX_LEN, "%s", name);
+
+ str = strstr(buf, "_");
+ if (!(str)) {
+ printk(KERN_ERR "Unable to locate \"_\" for $SUBSYSTEM_PLUGIN_$HOST_ID\n");
+ return ERR_PTR(-EINVAL);
+ }
+ se_plugin_str = buf;
+ /*
+ * Special case for subsystem plugins that have "_" in their names.
+ * Namely rd_direct and rd_mcp..
+ */
+ str2 = strstr(str+1, "_");
+ if ((str2)) {
+ *str2 = '\0'; /* Terminate for *se_plugin_str */
+ str2++; /* Skip to start of plugin dependent ID */
+ str = str2;
+ } else {
+ *str = '\0'; /* Terminate for *se_plugin_str */
+ str++; /* Skip to start of plugin dependent ID */
+ }
+
+ ret = strict_strtoul(str, 0, &plugin_dep_id);
+ if (ret < 0) {
+ printk(KERN_ERR "strict_strtoul() returned %d for"
+ " plugin_dep_id\n", ret);
+ return ERR_PTR(-EINVAL);
+ }
+ /*
+ * Load up TCM subsystem plugins if they have not already been loaded.
+ */
+ if (transport_subsystem_check_init() < 0)
+ return ERR_PTR(-EINVAL);
+
+ hba = core_alloc_hba(se_plugin_str, plugin_dep_id, 0);
+ if (IS_ERR(hba))
+ return ERR_CAST(hba);
+
+ config_group_init_type_name(&hba->hba_group, name,
+ &target_core_hba_cit);
+
+ return &hba->hba_group;
+}
+
+static void target_core_call_delhbafromtarget(
+ struct config_group *group,
+ struct config_item *item)
+{
+ struct se_hba *hba = item_to_hba(item);
+
+ config_item_put(item);
+ core_delete_hba(hba);
+}
+
+static struct configfs_group_operations target_core_group_ops = {
+ .make_group = target_core_call_addhbatotarget,
+ .drop_item = target_core_call_delhbafromtarget,
+};
+
+static struct config_item_type target_core_cit = {
+ .ct_item_ops = NULL,
+ .ct_group_ops = &target_core_group_ops,
+ .ct_attrs = NULL,
+ .ct_owner = THIS_MODULE,
+};
+
+/* Stop functions for struct config_item_type target_core_hba_cit */
+
+static int target_core_init_configfs(void)
+{
+ struct config_group *target_cg, *hba_cg = NULL, *alua_cg = NULL;
+ struct config_group *lu_gp_cg = NULL;
+ struct configfs_subsystem *subsys;
+ struct proc_dir_entry *scsi_target_proc = NULL;
+ struct t10_alua_lu_gp *lu_gp;
+ int ret;
+
+ printk(KERN_INFO "TARGET_CORE[0]: Loading Generic Kernel Storage"
+ " Engine: %s on %s/%s on "UTS_RELEASE"\n",
+ TARGET_CORE_VERSION, utsname()->sysname, utsname()->machine);
+
+ subsys = target_core_subsystem[0];
+ config_group_init(&subsys->su_group);
+ mutex_init(&subsys->su_mutex);
+
+ INIT_LIST_HEAD(&g_tf_list);
+ mutex_init(&g_tf_lock);
+ init_scsi_index_table();
+ ret = init_se_global();
+ if (ret < 0)
+ return -1;
+ /*
+ * Create $CONFIGFS/target/core default group for HBA <-> Storage Object
+ * and ALUA Logical Unit Group and Target Port Group infrastructure.
+ */
+ target_cg = &subsys->su_group;
+ target_cg->default_groups = kzalloc(sizeof(struct config_group) * 2,
+ GFP_KERNEL);
+ if (!(target_cg->default_groups)) {
+ printk(KERN_ERR "Unable to allocate target_cg->default_groups\n");
+ goto out_global;
+ }
+
+ config_group_init_type_name(&se_global->target_core_hbagroup,
+ "core", &target_core_cit);
+ target_cg->default_groups[0] = &se_global->target_core_hbagroup;
+ target_cg->default_groups[1] = NULL;
+ /*
+ * Create ALUA infrastructure under /sys/kernel/config/target/core/alua/
+ */
+ hba_cg = &se_global->target_core_hbagroup;
+ hba_cg->default_groups = kzalloc(sizeof(struct config_group) * 2,
+ GFP_KERNEL);
+ if (!(hba_cg->default_groups)) {
+ printk(KERN_ERR "Unable to allocate hba_cg->default_groups\n");
+ goto out_global;
+ }
+ config_group_init_type_name(&se_global->alua_group,
+ "alua", &target_core_alua_cit);
+ hba_cg->default_groups[0] = &se_global->alua_group;
+ hba_cg->default_groups[1] = NULL;
+ /*
+ * Add ALUA Logical Unit Group and Target Port Group ConfigFS
+ * groups under /sys/kernel/config/target/core/alua/
+ */
+ alua_cg = &se_global->alua_group;
+ alua_cg->default_groups = kzalloc(sizeof(struct config_group) * 2,
+ GFP_KERNEL);
+ if (!(alua_cg->default_groups)) {
+ printk(KERN_ERR "Unable to allocate alua_cg->default_groups\n");
+ goto out_global;
+ }
+
+ config_group_init_type_name(&se_global->alua_lu_gps_group,
+ "lu_gps", &target_core_alua_lu_gps_cit);
+ alua_cg->default_groups[0] = &se_global->alua_lu_gps_group;
+ alua_cg->default_groups[1] = NULL;
+ /*
+ * Add core/alua/lu_gps/default_lu_gp
+ */
+ lu_gp = core_alua_allocate_lu_gp("default_lu_gp", 1);
+ if (IS_ERR(lu_gp))
+ goto out_global;
+
+ lu_gp_cg = &se_global->alua_lu_gps_group;
+ lu_gp_cg->default_groups = kzalloc(sizeof(struct config_group) * 2,
+ GFP_KERNEL);
+ if (!(lu_gp_cg->default_groups)) {
+ printk(KERN_ERR "Unable to allocate lu_gp_cg->default_groups\n");
+ goto out_global;
+ }
+
+ config_group_init_type_name(&lu_gp->lu_gp_group, "default_lu_gp",
+ &target_core_alua_lu_gp_cit);
+ lu_gp_cg->default_groups[0] = &lu_gp->lu_gp_group;
+ lu_gp_cg->default_groups[1] = NULL;
+ se_global->default_lu_gp = lu_gp;
+ /*
+ * Register the target_core_mod subsystem with configfs.
+ */
+ ret = configfs_register_subsystem(subsys);
+ if (ret < 0) {
+ printk(KERN_ERR "Error %d while registering subsystem %s\n",
+ ret, subsys->su_group.cg_item.ci_namebuf);
+ goto out_global;
+ }
+ printk(KERN_INFO "TARGET_CORE[0]: Initialized ConfigFS Fabric"
+ " Infrastructure: "TARGET_CORE_CONFIGFS_VERSION" on %s/%s"
+ " on "UTS_RELEASE"\n", utsname()->sysname, utsname()->machine);
+ /*
+ * Register built-in RAMDISK subsystem logic for virtual LUN 0
+ */
+ ret = rd_module_init();
+ if (ret < 0)
+ goto out;
+
+ if (core_dev_setup_virtual_lun0() < 0)
+ goto out;
+
+ scsi_target_proc = proc_mkdir("scsi_target", 0);
+ if (!(scsi_target_proc)) {
+ printk(KERN_ERR "proc_mkdir(scsi_target, 0) failed\n");
+ goto out;
+ }
+ ret = init_scsi_target_mib();
+ if (ret < 0)
+ goto out;
+
+ return 0;
+
+out:
+ configfs_unregister_subsystem(subsys);
+ if (scsi_target_proc)
+ remove_proc_entry("scsi_target", 0);
+ core_dev_release_virtual_lun0();
+ rd_module_exit();
+out_global:
+ if (se_global->default_lu_gp) {
+ core_alua_free_lu_gp(se_global->default_lu_gp);
+ se_global->default_lu_gp = NULL;
+ }
+ if (lu_gp_cg)
+ kfree(lu_gp_cg->default_groups);
+ if (alua_cg)
+ kfree(alua_cg->default_groups);
+ if (hba_cg)
+ kfree(hba_cg->default_groups);
+ kfree(target_cg->default_groups);
+ release_se_global();
+ return -1;
+}
+
+static void target_core_exit_configfs(void)
+{
+ struct configfs_subsystem *subsys;
+ struct config_group *hba_cg, *alua_cg, *lu_gp_cg;
+ struct config_item *item;
+ int i;
+
+ se_global->in_shutdown = 1;
+ subsys = target_core_subsystem[0];
+
+ lu_gp_cg = &se_global->alua_lu_gps_group;
+ for (i = 0; lu_gp_cg->default_groups[i]; i++) {
+ item = &lu_gp_cg->default_groups[i]->cg_item;
+ lu_gp_cg->default_groups[i] = NULL;
+ config_item_put(item);
+ }
+ kfree(lu_gp_cg->default_groups);
+ core_alua_free_lu_gp(se_global->default_lu_gp);
+ se_global->default_lu_gp = NULL;
+
+ alua_cg = &se_global->alua_group;
+ for (i = 0; alua_cg->default_groups[i]; i++) {
+ item = &alua_cg->default_groups[i]->cg_item;
+ alua_cg->default_groups[i] = NULL;
+ config_item_put(item);
+ }
+ kfree(alua_cg->default_groups);
+
+ hba_cg = &se_global->target_core_hbagroup;
+ for (i = 0; hba_cg->default_groups[i]; i++) {
+ item = &hba_cg->default_groups[i]->cg_item;
+ hba_cg->default_groups[i] = NULL;
+ config_item_put(item);
+ }
+ kfree(hba_cg->default_groups);
+
+ for (i = 0; subsys->su_group.default_groups[i]; i++) {
+ item = &subsys->su_group.default_groups[i]->cg_item;
+ subsys->su_group.default_groups[i] = NULL;
+ config_item_put(item);
+ }
+ kfree(subsys->su_group.default_groups);
+
+ configfs_unregister_subsystem(subsys);
+ printk(KERN_INFO "TARGET_CORE[0]: Released ConfigFS Fabric"
+ " Infrastructure\n");
+
+ remove_scsi_target_mib();
+ remove_proc_entry("scsi_target", 0);
+ core_dev_release_virtual_lun0();
+ rd_module_exit();
+ release_se_global();
+
+ return;
+}
+
+MODULE_DESCRIPTION("Target_Core_Mod/ConfigFS");
+MODULE_AUTHOR("nab@Linux-iSCSI.org");
+MODULE_LICENSE("GPL");
+
+module_init(target_core_init_configfs);
+module_exit(target_core_exit_configfs);
diff --git a/include/target/target_core_configfs.h b/include/target/target_core_configfs.h
new file mode 100644
index 0000000..40e6e74
--- /dev/null
+++ b/include/target/target_core_configfs.h
@@ -0,0 +1,52 @@
+#define TARGET_CORE_CONFIGFS_VERSION TARGET_CORE_MOD_VERSION
+
+#define TARGET_CORE_CONFIG_ROOT "/sys/kernel/config"
+
+#define TARGET_CORE_NAME_MAX_LEN 64
+#define TARGET_FABRIC_NAME_SIZE 32
+
+extern struct target_fabric_configfs *target_fabric_configfs_init(
+ struct module *, const char *);
+extern void target_fabric_configfs_free(struct target_fabric_configfs *);
+extern int target_fabric_configfs_register(struct target_fabric_configfs *);
+extern void target_fabric_configfs_deregister(struct target_fabric_configfs *);
+
+struct target_fabric_configfs_template {
+ struct config_item_type tfc_discovery_cit;
+ struct config_item_type tfc_wwn_cit;
+ struct config_item_type tfc_tpg_cit;
+ struct config_item_type tfc_tpg_base_cit;
+ struct config_item_type tfc_tpg_lun_cit;
+ struct config_item_type tfc_tpg_port_cit;
+ struct config_item_type tfc_tpg_np_cit;
+ struct config_item_type tfc_tpg_np_base_cit;
+ struct config_item_type tfc_tpg_attrib_cit;
+ struct config_item_type tfc_tpg_param_cit;
+ struct config_item_type tfc_tpg_nacl_cit;
+ struct config_item_type tfc_tpg_nacl_base_cit;
+ struct config_item_type tfc_tpg_nacl_attrib_cit;
+ struct config_item_type tfc_tpg_nacl_auth_cit;
+ struct config_item_type tfc_tpg_nacl_param_cit;
+ struct config_item_type tfc_tpg_mappedlun_cit;
+};
+
+struct target_fabric_configfs {
+ char tf_name[TARGET_FABRIC_NAME_SIZE];
+ atomic_t tf_access_cnt;
+ struct list_head tf_list;
+ struct config_group tf_group;
+ struct config_group tf_disc_group;
+ struct config_group *tf_default_groups[2];
+ /* Pointer to fabric's config_item */
+ struct config_item *tf_fabric;
+ /* Passed from fabric modules */
+ struct config_item_type *tf_fabric_cit;
+ /* Pointer to target core subsystem */
+ struct configfs_subsystem *tf_subsys;
+ /* Pointer to fabric's struct module */
+ struct module *tf_module;
+ struct target_core_fabric_ops tf_ops;
+ struct target_fabric_configfs_template tf_cit_tmpl;
+};
+
+#define TF_CIT_TMPL(tf) (&(tf)->tf_cit_tmpl)
--
1.7.3.4
^ permalink raw reply related [flat|nested] 22+ messages in thread* [PATCH v2 02e/03] target: Add fabric and subsystem transport engine core
2010-12-17 21:11 [PATCH v2 00/03] target: Initial merge of v4.0.0-rc6 for .38 Nicholas A. Bellinger
` (4 preceding siblings ...)
2010-12-17 21:11 ` [PATCH v2 02d/03] target: Add ConfigFS subsystem backstore infrastructure Nicholas A. Bellinger
@ 2010-12-17 21:11 ` Nicholas A. Bellinger
2010-12-17 21:11 ` [PATCH v2 02f/03] target: Add HBA core infrastructure Nicholas A. Bellinger
` (14 subsequent siblings)
20 siblings, 0 replies; 22+ messages in thread
From: Nicholas A. Bellinger @ 2010-12-17 21:11 UTC (permalink / raw)
To: linux-scsi, James Bottomley; +Cc: Nicholas Bellinger
From: Nicholas Bellinger <nab@linux-iscsi.org>
The patch adds core generic target engine functionality including processing of struct se_cmd
generation of N struct se_task, control CDB emulation, sense data, memory allocation, and
and mapping from fabric module allocated memory using linked list struct scatterlist
style memory based on the limitiations of the underlying TCM HBA and Device backstores.
The TCM layer sits is above Linux/SCSI, Linux/BLOCK and Linux/VFS subsystems, and
communicates with these subsystems (and local RAMDISK plugins) using an API of function
pointers in se_subsystem_api_t. It provides processing capabilties and emulation for SCSI
logic and CDBs in a generic manner to storage object LUNs provided from Linux storage
subsystems backend storage devices.
Signed-off-by: Nicholas A. Bellinger <nab@linux-iscsi.org>
---
drivers/target/target_core_cdb.c | 1131 ++++++
drivers/target/target_core_scdb.c | 105 +
drivers/target/target_core_scdb.h | 10 +
drivers/target/target_core_transport.c | 6133 ++++++++++++++++++++++++++++++++
include/target/target_core_transport.h | 350 ++
5 files changed, 7729 insertions(+), 0 deletions(-)
create mode 100644 drivers/target/target_core_cdb.c
create mode 100644 drivers/target/target_core_scdb.c
create mode 100644 drivers/target/target_core_scdb.h
create mode 100644 drivers/target/target_core_transport.c
create mode 100644 include/target/target_core_transport.h
diff --git a/drivers/target/target_core_cdb.c b/drivers/target/target_core_cdb.c
new file mode 100644
index 0000000..366080b
--- /dev/null
+++ b/drivers/target/target_core_cdb.c
@@ -0,0 +1,1131 @@
+/*
+ * CDB emulation for non-READ/WRITE commands.
+ *
+ * Copyright (c) 2002, 2003, 2004, 2005 PyX Technologies, Inc.
+ * Copyright (c) 2005, 2006, 2007 SBE, Inc.
+ * Copyright (c) 2007-2010 Rising Tide Systems
+ * Copyright (c) 2008-2010 Linux-iSCSI.org
+ *
+ * Nicholas A. Bellinger <nab@kernel.org>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+ */
+
+#include <asm/unaligned.h>
+#include <scsi/scsi.h>
+
+#include <target/target_core_base.h>
+#include <target/target_core_transport.h>
+#include <target/target_core_fabric_ops.h>
+#include "target_core_ua.h"
+
+static void
+target_fill_alua_data(struct se_port *port, unsigned char *buf)
+{
+ struct t10_alua_tg_pt_gp *tg_pt_gp;
+ struct t10_alua_tg_pt_gp_member *tg_pt_gp_mem;
+
+ /*
+ * Set SCCS for MAINTENANCE_IN + REPORT_TARGET_PORT_GROUPS.
+ */
+ buf[5] = 0x80;
+
+ /*
+ * Set TPGS field for explict and/or implict ALUA access type
+ * and opteration.
+ *
+ * See spc4r17 section 6.4.2 Table 135
+ */
+ if (!port)
+ return;
+ tg_pt_gp_mem = port->sep_alua_tg_pt_gp_mem;
+ if (!tg_pt_gp_mem)
+ return;
+
+ spin_lock(&tg_pt_gp_mem->tg_pt_gp_mem_lock);
+ tg_pt_gp = tg_pt_gp_mem->tg_pt_gp;
+ if (tg_pt_gp)
+ buf[5] |= tg_pt_gp->tg_pt_gp_alua_access_type;
+ spin_unlock(&tg_pt_gp_mem->tg_pt_gp_mem_lock);
+}
+
+static int
+target_emulate_inquiry_std(struct se_cmd *cmd)
+{
+ struct se_lun *lun = SE_LUN(cmd);
+ struct se_device *dev = SE_DEV(cmd);
+ unsigned char *buf = cmd->t_task->t_task_buf;
+
+ /*
+ * Make sure we at least have 6 bytes of INQUIRY response
+ * payload going back for EVPD=0
+ */
+ if (cmd->data_length < 6) {
+ printk(KERN_ERR "SCSI Inquiry payload length: %u"
+ " too small for EVPD=0\n", cmd->data_length);
+ return -1;
+ }
+
+ buf[0] = dev->transport->get_device_type(dev);
+ if (buf[0] == TYPE_TAPE)
+ buf[1] = 0x80;
+ buf[2] = dev->transport->get_device_rev(dev);
+
+ /*
+ * Enable SCCS and TPGS fields for Emulated ALUA
+ */
+ if (T10_ALUA(dev->se_sub_dev)->alua_type == SPC3_ALUA_EMULATED)
+ target_fill_alua_data(lun->lun_sep, buf);
+
+ if (cmd->data_length < 8) {
+ buf[4] = 1; /* Set additional length to 1 */
+ return 0;
+ }
+
+ buf[7] = 0x32; /* Sync=1 and CmdQue=1 */
+
+ /*
+ * Do not include vendor, product, reversion info in INQUIRY
+ * response payload for cdbs with a small allocation length.
+ */
+ if (cmd->data_length < 36) {
+ buf[4] = 3; /* Set additional length to 3 */
+ return 0;
+ }
+
+ snprintf((unsigned char *)&buf[8], 8, "LIO-ORG");
+ snprintf((unsigned char *)&buf[16], 16, "%s",
+ &DEV_T10_WWN(dev)->model[0]);
+ snprintf((unsigned char *)&buf[32], 4, "%s",
+ &DEV_T10_WWN(dev)->revision[0]);
+ buf[4] = 31; /* Set additional length to 31 */
+ return 0;
+}
+
+/* supported vital product data pages */
+static int
+target_emulate_evpd_00(struct se_cmd *cmd, unsigned char *buf)
+{
+ buf[1] = 0x00;
+ if (cmd->data_length < 8)
+ return 0;
+
+ buf[4] = 0x0;
+ /*
+ * Only report the INQUIRY EVPD=1 pages after a valid NAA
+ * Registered Extended LUN WWN has been set via ConfigFS
+ * during device creation/restart.
+ */
+ if (SE_DEV(cmd)->se_sub_dev->su_dev_flags &
+ SDF_EMULATED_VPD_UNIT_SERIAL) {
+ buf[3] = 3;
+ buf[5] = 0x80;
+ buf[6] = 0x83;
+ buf[7] = 0x86;
+ }
+
+ return 0;
+}
+
+/* unit serial number */
+static int
+target_emulate_evpd_80(struct se_cmd *cmd, unsigned char *buf)
+{
+ struct se_device *dev = SE_DEV(cmd);
+ u16 len = 0;
+
+ buf[1] = 0x80;
+ if (dev->se_sub_dev->su_dev_flags &
+ SDF_EMULATED_VPD_UNIT_SERIAL) {
+ u32 unit_serial_len;
+
+ unit_serial_len =
+ strlen(&DEV_T10_WWN(dev)->unit_serial[0]);
+ unit_serial_len++; /* For NULL Terminator */
+
+ if (((len + 4) + unit_serial_len) > cmd->data_length) {
+ len += unit_serial_len;
+ buf[2] = ((len >> 8) & 0xff);
+ buf[3] = (len & 0xff);
+ return 0;
+ }
+ len += sprintf((unsigned char *)&buf[4], "%s",
+ &DEV_T10_WWN(dev)->unit_serial[0]);
+ len++; /* Extra Byte for NULL Terminator */
+ buf[3] = len;
+ }
+ return 0;
+}
+
+/*
+ * Device identification VPD, for a complete list of
+ * DESIGNATOR TYPEs see spc4r17 Table 459.
+ */
+static int
+target_emulate_evpd_83(struct se_cmd *cmd, unsigned char *buf)
+{
+ struct se_device *dev = SE_DEV(cmd);
+ struct se_lun *lun = SE_LUN(cmd);
+ struct se_port *port = NULL;
+ struct se_portal_group *tpg = NULL;
+ struct t10_alua_lu_gp_member *lu_gp_mem;
+ struct t10_alua_tg_pt_gp *tg_pt_gp;
+ struct t10_alua_tg_pt_gp_member *tg_pt_gp_mem;
+ unsigned char binary, binary_new;
+ unsigned char *prod = &DEV_T10_WWN(dev)->model[0];
+ u32 prod_len;
+ u32 unit_serial_len, off = 0;
+ int i;
+ u16 len = 0, id_len;
+
+ buf[1] = 0x83;
+ off = 4;
+
+ /*
+ * NAA IEEE Registered Extended Assigned designator format, see
+ * spc4r17 section 7.7.3.6.5
+ *
+ * We depend upon a target_core_mod/ConfigFS provided
+ * /sys/kernel/config/target/core/$HBA/$DEV/wwn/vpd_unit_serial
+ * value in order to return the NAA id.
+ */
+ if (!(dev->se_sub_dev->su_dev_flags & SDF_EMULATED_VPD_UNIT_SERIAL))
+ goto check_t10_vend_desc;
+
+ if (off + 20 > cmd->data_length)
+ goto check_t10_vend_desc;
+
+ /* CODE SET == Binary */
+ buf[off++] = 0x1;
+
+ /* Set ASSOICATION == addressed logical unit: 0)b */
+ buf[off] = 0x00;
+
+ /* Identifier/Designator type == NAA identifier */
+ buf[off++] = 0x3;
+ off++;
+
+ /* Identifier/Designator length */
+ buf[off++] = 0x10;
+
+ /*
+ * Start NAA IEEE Registered Extended Identifier/Designator
+ */
+ buf[off++] = (0x6 << 4);
+
+ /*
+ * Use OpenFabrics IEEE Company ID: 00 14 05
+ */
+ buf[off++] = 0x01;
+ buf[off++] = 0x40;
+ buf[off] = (0x5 << 4);
+
+ /*
+ * Return ConfigFS Unit Serial Number information for
+ * VENDOR_SPECIFIC_IDENTIFIER and
+ * VENDOR_SPECIFIC_IDENTIFIER_EXTENTION
+ */
+ binary = transport_asciihex_to_binaryhex(
+ &DEV_T10_WWN(dev)->unit_serial[0]);
+ buf[off++] |= (binary & 0xf0) >> 4;
+ for (i = 0; i < 24; i += 2) {
+ binary_new = transport_asciihex_to_binaryhex(
+ &DEV_T10_WWN(dev)->unit_serial[i+2]);
+ buf[off] = (binary & 0x0f) << 4;
+ buf[off++] |= (binary_new & 0xf0) >> 4;
+ binary = binary_new;
+ }
+ len = 20;
+ off = (len + 4);
+
+check_t10_vend_desc:
+ /*
+ * T10 Vendor Identifier Page, see spc4r17 section 7.7.3.4
+ */
+ id_len = 8; /* For Vendor field */
+ prod_len = 4; /* For VPD Header */
+ prod_len += 8; /* For Vendor field */
+ prod_len += strlen(prod);
+ prod_len++; /* For : */
+
+ if (dev->se_sub_dev->su_dev_flags &
+ SDF_EMULATED_VPD_UNIT_SERIAL) {
+ unit_serial_len =
+ strlen(&DEV_T10_WWN(dev)->unit_serial[0]);
+ unit_serial_len++; /* For NULL Terminator */
+
+ if ((len + (id_len + 4) +
+ (prod_len + unit_serial_len)) >
+ cmd->data_length) {
+ len += (prod_len + unit_serial_len);
+ goto check_port;
+ }
+ id_len += sprintf((unsigned char *)&buf[off+12],
+ "%s:%s", prod,
+ &DEV_T10_WWN(dev)->unit_serial[0]);
+ }
+ buf[off] = 0x2; /* ASCII */
+ buf[off+1] = 0x1; /* T10 Vendor ID */
+ buf[off+2] = 0x0;
+ memcpy((unsigned char *)&buf[off+4], "LIO-ORG", 8);
+ /* Extra Byte for NULL Terminator */
+ id_len++;
+ /* Identifier Length */
+ buf[off+3] = id_len;
+ /* Header size for Designation descriptor */
+ len += (id_len + 4);
+ off += (id_len + 4);
+ /*
+ * struct se_port is only set for INQUIRY VPD=1 through $FABRIC_MOD
+ */
+check_port:
+ port = lun->lun_sep;
+ if (port) {
+ struct t10_alua_lu_gp *lu_gp;
+ u32 padding, scsi_name_len;
+ u16 lu_gp_id = 0;
+ u16 tg_pt_gp_id = 0;
+ u16 tpgt;
+
+ tpg = port->sep_tpg;
+ /*
+ * Relative target port identifer, see spc4r17
+ * section 7.7.3.7
+ *
+ * Get the PROTOCOL IDENTIFIER as defined by spc4r17
+ * section 7.5.1 Table 362
+ */
+ if (((len + 4) + 8) > cmd->data_length) {
+ len += 8;
+ goto check_tpgi;
+ }
+ buf[off] =
+ (TPG_TFO(tpg)->get_fabric_proto_ident(tpg) << 4);
+ buf[off++] |= 0x1; /* CODE SET == Binary */
+ buf[off] = 0x80; /* Set PIV=1 */
+ /* Set ASSOICATION == target port: 01b */
+ buf[off] |= 0x10;
+ /* DESIGNATOR TYPE == Relative target port identifer */
+ buf[off++] |= 0x4;
+ off++; /* Skip over Reserved */
+ buf[off++] = 4; /* DESIGNATOR LENGTH */
+ /* Skip over Obsolete field in RTPI payload
+ * in Table 472 */
+ off += 2;
+ buf[off++] = ((port->sep_rtpi >> 8) & 0xff);
+ buf[off++] = (port->sep_rtpi & 0xff);
+ len += 8; /* Header size + Designation descriptor */
+ /*
+ * Target port group identifier, see spc4r17
+ * section 7.7.3.8
+ *
+ * Get the PROTOCOL IDENTIFIER as defined by spc4r17
+ * section 7.5.1 Table 362
+ */
+check_tpgi:
+ if (T10_ALUA(dev->se_sub_dev)->alua_type !=
+ SPC3_ALUA_EMULATED)
+ goto check_scsi_name;
+
+ if (((len + 4) + 8) > cmd->data_length) {
+ len += 8;
+ goto check_lu_gp;
+ }
+ tg_pt_gp_mem = port->sep_alua_tg_pt_gp_mem;
+ if (!tg_pt_gp_mem)
+ goto check_lu_gp;
+
+ spin_lock(&tg_pt_gp_mem->tg_pt_gp_mem_lock);
+ tg_pt_gp = tg_pt_gp_mem->tg_pt_gp;
+ if (!(tg_pt_gp)) {
+ spin_unlock(&tg_pt_gp_mem->tg_pt_gp_mem_lock);
+ goto check_lu_gp;
+ }
+ tg_pt_gp_id = tg_pt_gp->tg_pt_gp_id;
+ spin_unlock(&tg_pt_gp_mem->tg_pt_gp_mem_lock);
+
+ buf[off] =
+ (TPG_TFO(tpg)->get_fabric_proto_ident(tpg) << 4);
+ buf[off++] |= 0x1; /* CODE SET == Binary */
+ buf[off] = 0x80; /* Set PIV=1 */
+ /* Set ASSOICATION == target port: 01b */
+ buf[off] |= 0x10;
+ /* DESIGNATOR TYPE == Target port group identifier */
+ buf[off++] |= 0x5;
+ off++; /* Skip over Reserved */
+ buf[off++] = 4; /* DESIGNATOR LENGTH */
+ off += 2; /* Skip over Reserved Field */
+ buf[off++] = ((tg_pt_gp_id >> 8) & 0xff);
+ buf[off++] = (tg_pt_gp_id & 0xff);
+ len += 8; /* Header size + Designation descriptor */
+ /*
+ * Logical Unit Group identifier, see spc4r17
+ * section 7.7.3.8
+ */
+check_lu_gp:
+ if (((len + 4) + 8) > cmd->data_length) {
+ len += 8;
+ goto check_scsi_name;
+ }
+ lu_gp_mem = dev->dev_alua_lu_gp_mem;
+ if (!(lu_gp_mem))
+ goto check_scsi_name;
+
+ spin_lock(&lu_gp_mem->lu_gp_mem_lock);
+ lu_gp = lu_gp_mem->lu_gp;
+ if (!(lu_gp)) {
+ spin_unlock(&lu_gp_mem->lu_gp_mem_lock);
+ goto check_scsi_name;
+ }
+ lu_gp_id = lu_gp->lu_gp_id;
+ spin_unlock(&lu_gp_mem->lu_gp_mem_lock);
+
+ buf[off++] |= 0x1; /* CODE SET == Binary */
+ /* DESIGNATOR TYPE == Logical Unit Group identifier */
+ buf[off++] |= 0x6;
+ off++; /* Skip over Reserved */
+ buf[off++] = 4; /* DESIGNATOR LENGTH */
+ off += 2; /* Skip over Reserved Field */
+ buf[off++] = ((lu_gp_id >> 8) & 0xff);
+ buf[off++] = (lu_gp_id & 0xff);
+ len += 8; /* Header size + Designation descriptor */
+ /*
+ * SCSI name string designator, see spc4r17
+ * section 7.7.3.11
+ *
+ * Get the PROTOCOL IDENTIFIER as defined by spc4r17
+ * section 7.5.1 Table 362
+ */
+check_scsi_name:
+ scsi_name_len = strlen(TPG_TFO(tpg)->tpg_get_wwn(tpg));
+ /* UTF-8 ",t,0x<16-bit TPGT>" + NULL Terminator */
+ scsi_name_len += 10;
+ /* Check for 4-byte padding */
+ padding = ((-scsi_name_len) & 3);
+ if (padding != 0)
+ scsi_name_len += padding;
+ /* Header size + Designation descriptor */
+ scsi_name_len += 4;
+
+ if (((len + 4) + scsi_name_len) > cmd->data_length) {
+ len += scsi_name_len;
+ goto set_len;
+ }
+ buf[off] =
+ (TPG_TFO(tpg)->get_fabric_proto_ident(tpg) << 4);
+ buf[off++] |= 0x3; /* CODE SET == UTF-8 */
+ buf[off] = 0x80; /* Set PIV=1 */
+ /* Set ASSOICATION == target port: 01b */
+ buf[off] |= 0x10;
+ /* DESIGNATOR TYPE == SCSI name string */
+ buf[off++] |= 0x8;
+ off += 2; /* Skip over Reserved and length */
+ /*
+ * SCSI name string identifer containing, $FABRIC_MOD
+ * dependent information. For LIO-Target and iSCSI
+ * Target Port, this means "<iSCSI name>,t,0x<TPGT> in
+ * UTF-8 encoding.
+ */
+ tpgt = TPG_TFO(tpg)->tpg_get_tag(tpg);
+ scsi_name_len = sprintf(&buf[off], "%s,t,0x%04x",
+ TPG_TFO(tpg)->tpg_get_wwn(tpg), tpgt);
+ scsi_name_len += 1 /* Include NULL terminator */;
+ /*
+ * The null-terminated, null-padded (see 4.4.2) SCSI
+ * NAME STRING field contains a UTF-8 format string.
+ * The number of bytes in the SCSI NAME STRING field
+ * (i.e., the value in the DESIGNATOR LENGTH field)
+ * shall be no larger than 256 and shall be a multiple
+ * of four.
+ */
+ if (padding)
+ scsi_name_len += padding;
+
+ buf[off-1] = scsi_name_len;
+ off += scsi_name_len;
+ /* Header size + Designation descriptor */
+ len += (scsi_name_len + 4);
+ }
+set_len:
+ buf[2] = ((len >> 8) & 0xff);
+ buf[3] = (len & 0xff); /* Page Length for VPD 0x83 */
+ return 0;
+}
+
+/* Extended INQUIRY Data VPD Page */
+static int
+target_emulate_evpd_86(struct se_cmd *cmd, unsigned char *buf)
+{
+ if (cmd->data_length < 60)
+ return 0;
+
+ buf[1] = 0x86;
+ buf[2] = 0x3c;
+ /* Set HEADSUP, ORDSUP, SIMPSUP */
+ buf[5] = 0x07;
+
+ /* If WriteCache emulation is enabled, set V_SUP */
+ if (DEV_ATTRIB(SE_DEV(cmd))->emulate_write_cache > 0)
+ buf[6] = 0x01;
+ return 0;
+}
+
+/* Block Limits VPD page */
+static int
+target_emulate_evpd_b0(struct se_cmd *cmd, unsigned char *buf)
+{
+ struct se_device *dev = SE_DEV(cmd);
+ int have_tp = 0;
+
+ /*
+ * Following sbc3r22 section 6.5.3 Block Limits VPD page, when
+ * emulate_tpu=1 or emulate_tpws=1 we will be expect a
+ * different page length for Thin Provisioning.
+ */
+ if (DEV_ATTRIB(dev)->emulate_tpu || DEV_ATTRIB(dev)->emulate_tpws)
+ have_tp = 1;
+
+ if (cmd->data_length < (0x10 + 4)) {
+ printk(KERN_INFO "Received data_length: %u"
+ " too small for EVPD 0xb0\n",
+ cmd->data_length);
+ return -1;
+ }
+
+ if (have_tp && cmd->data_length < (0x3c + 4)) {
+ printk(KERN_INFO "Received data_length: %u"
+ " too small for TPE=1 EVPD 0xb0\n",
+ cmd->data_length);
+ have_tp = 0;
+ }
+
+ buf[0] = dev->transport->get_device_type(dev);
+ buf[1] = 0xb0;
+ buf[3] = have_tp ? 0x3c : 0x10;
+
+ /*
+ * Set OPTIMAL TRANSFER LENGTH GRANULARITY
+ */
+ put_unaligned_be16(1, &buf[6]);
+
+ /*
+ * Set MAXIMUM TRANSFER LENGTH
+ */
+ put_unaligned_be32(DEV_ATTRIB(dev)->max_sectors, &buf[8]);
+
+ /*
+ * Set OPTIMAL TRANSFER LENGTH
+ */
+ put_unaligned_be32(DEV_ATTRIB(dev)->optimal_sectors, &buf[12]);
+
+ /*
+ * Exit now if we don't support TP or the initiator sent a too
+ * short buffer.
+ */
+ if (!have_tp || cmd->data_length < (0x3c + 4))
+ return 0;
+
+ /*
+ * Set MAXIMUM UNMAP LBA COUNT
+ */
+ put_unaligned_be32(DEV_ATTRIB(dev)->max_unmap_lba_count, &buf[20]);
+
+ /*
+ * Set MAXIMUM UNMAP BLOCK DESCRIPTOR COUNT
+ */
+ put_unaligned_be32(DEV_ATTRIB(dev)->max_unmap_block_desc_count,
+ &buf[24]);
+
+ /*
+ * Set OPTIMAL UNMAP GRANULARITY
+ */
+ put_unaligned_be32(DEV_ATTRIB(dev)->unmap_granularity, &buf[28]);
+
+ /*
+ * UNMAP GRANULARITY ALIGNMENT
+ */
+ put_unaligned_be32(DEV_ATTRIB(dev)->unmap_granularity_alignment,
+ &buf[32]);
+ if (DEV_ATTRIB(dev)->unmap_granularity_alignment != 0)
+ buf[32] |= 0x80; /* Set the UGAVALID bit */
+
+ return 0;
+}
+
+/* Thin Provisioning VPD */
+static int
+target_emulate_evpd_b2(struct se_cmd *cmd, unsigned char *buf)
+{
+ struct se_device *dev = SE_DEV(cmd);
+
+ /*
+ * From sbc3r22 section 6.5.4 Thin Provisioning VPD page:
+ *
+ * The PAGE LENGTH field is defined in SPC-4. If the DP bit is set to
+ * zero, then the page length shall be set to 0004h. If the DP bit
+ * is set to one, then the page length shall be set to the value
+ * defined in table 162.
+ */
+ buf[0] = dev->transport->get_device_type(dev);
+ buf[1] = 0xb2;
+
+ /*
+ * Set Hardcoded length mentioned above for DP=0
+ */
+ put_unaligned_be16(0x0004, &buf[2]);
+
+ /*
+ * The THRESHOLD EXPONENT field indicates the threshold set size in
+ * LBAs as a power of 2 (i.e., the threshold set size is equal to
+ * 2(threshold exponent)).
+ *
+ * Note that this is currently set to 0x00 as mkp says it will be
+ * changing again. We can enable this once it has settled in T10
+ * and is actually used by Linux/SCSI ML code.
+ */
+ buf[4] = 0x00;
+
+ /*
+ * A TPU bit set to one indicates that the device server supports
+ * the UNMAP command (see 5.25). A TPU bit set to zero indicates
+ * that the device server does not support the UNMAP command.
+ */
+ if (DEV_ATTRIB(dev)->emulate_tpu != 0)
+ buf[5] = 0x80;
+
+ /*
+ * A TPWS bit set to one indicates that the device server supports
+ * the use of the WRITE SAME (16) command (see 5.42) to unmap LBAs.
+ * A TPWS bit set to zero indicates that the device server does not
+ * support the use of the WRITE SAME (16) command to unmap LBAs.
+ */
+ if (DEV_ATTRIB(dev)->emulate_tpws != 0)
+ buf[5] |= 0x40;
+
+ return 0;
+}
+
+static int
+target_emulate_inquiry(struct se_cmd *cmd)
+{
+ struct se_device *dev = SE_DEV(cmd);
+ unsigned char *buf = cmd->t_task->t_task_buf;
+ unsigned char *cdb = cmd->t_task->t_task_cdb;
+
+ if (!(cdb[1] & 0x1))
+ return target_emulate_inquiry_std(cmd);
+
+ /*
+ * Make sure we at least have 4 bytes of INQUIRY response
+ * payload for 0x00 going back for EVPD=1. Note that 0x80
+ * and 0x83 will check for enough payload data length and
+ * jump to set_len: label when there is not enough inquiry EVPD
+ * payload length left for the next outgoing EVPD metadata
+ */
+ if (cmd->data_length < 4) {
+ printk(KERN_ERR "SCSI Inquiry payload length: %u"
+ " too small for EVPD=1\n", cmd->data_length);
+ return -1;
+ }
+ buf[0] = dev->transport->get_device_type(dev);
+
+ switch (cdb[2]) {
+ case 0x00:
+ return target_emulate_evpd_00(cmd, buf);
+ case 0x80:
+ return target_emulate_evpd_80(cmd, buf);
+ case 0x83:
+ return target_emulate_evpd_83(cmd, buf);
+ case 0x86:
+ return target_emulate_evpd_86(cmd, buf);
+ case 0xb0:
+ return target_emulate_evpd_b0(cmd, buf);
+ case 0xb2:
+ return target_emulate_evpd_b2(cmd, buf);
+ default:
+ printk(KERN_ERR "Unknown VPD Code: 0x%02x\n", cdb[2]);
+ return -1;
+ }
+
+ return 0;
+}
+
+static int
+target_emulate_readcapacity(struct se_cmd *cmd)
+{
+ struct se_device *dev = SE_DEV(cmd);
+ unsigned char *buf = cmd->t_task->t_task_buf;
+ u32 blocks = dev->transport->get_blocks(dev);
+
+ buf[0] = (blocks >> 24) & 0xff;
+ buf[1] = (blocks >> 16) & 0xff;
+ buf[2] = (blocks >> 8) & 0xff;
+ buf[3] = blocks & 0xff;
+ buf[4] = (DEV_ATTRIB(dev)->block_size >> 24) & 0xff;
+ buf[5] = (DEV_ATTRIB(dev)->block_size >> 16) & 0xff;
+ buf[6] = (DEV_ATTRIB(dev)->block_size >> 8) & 0xff;
+ buf[7] = DEV_ATTRIB(dev)->block_size & 0xff;
+ /*
+ * Set max 32-bit blocks to signal SERVICE ACTION READ_CAPACITY_16
+ */
+ if (DEV_ATTRIB(dev)->emulate_tpu || DEV_ATTRIB(dev)->emulate_tpws)
+ put_unaligned_be32(0xFFFFFFFF, &buf[0]);
+
+ return 0;
+}
+
+static int
+target_emulate_readcapacity_16(struct se_cmd *cmd)
+{
+ struct se_device *dev = SE_DEV(cmd);
+ unsigned char *buf = cmd->t_task->t_task_buf;
+ unsigned long long blocks = dev->transport->get_blocks(dev);
+
+ buf[0] = (blocks >> 56) & 0xff;
+ buf[1] = (blocks >> 48) & 0xff;
+ buf[2] = (blocks >> 40) & 0xff;
+ buf[3] = (blocks >> 32) & 0xff;
+ buf[4] = (blocks >> 24) & 0xff;
+ buf[5] = (blocks >> 16) & 0xff;
+ buf[6] = (blocks >> 8) & 0xff;
+ buf[7] = blocks & 0xff;
+ buf[8] = (DEV_ATTRIB(dev)->block_size >> 24) & 0xff;
+ buf[9] = (DEV_ATTRIB(dev)->block_size >> 16) & 0xff;
+ buf[10] = (DEV_ATTRIB(dev)->block_size >> 8) & 0xff;
+ buf[11] = DEV_ATTRIB(dev)->block_size & 0xff;
+ /*
+ * Set Thin Provisioning Enable bit following sbc3r22 in section
+ * READ CAPACITY (16) byte 14 if emulate_tpu or emulate_tpws is enabled.
+ */
+ if (DEV_ATTRIB(dev)->emulate_tpu || DEV_ATTRIB(dev)->emulate_tpws)
+ buf[14] = 0x80;
+
+ return 0;
+}
+
+static int
+target_modesense_rwrecovery(unsigned char *p)
+{
+ p[0] = 0x01;
+ p[1] = 0x0a;
+
+ return 12;
+}
+
+static int
+target_modesense_control(struct se_device *dev, unsigned char *p)
+{
+ p[0] = 0x0a;
+ p[1] = 0x0a;
+ p[2] = 2;
+ /*
+ * From spc4r17, section 7.4.6 Control mode Page
+ *
+ * Unit Attention interlocks control (UN_INTLCK_CTRL) to code 00b
+ *
+ * 00b: The logical unit shall clear any unit attention condition
+ * reported in the same I_T_L_Q nexus transaction as a CHECK CONDITION
+ * status and shall not establish a unit attention condition when a com-
+ * mand is completed with BUSY, TASK SET FULL, or RESERVATION CONFLICT
+ * status.
+ *
+ * 10b: The logical unit shall not clear any unit attention condition
+ * reported in the same I_T_L_Q nexus transaction as a CHECK CONDITION
+ * status and shall not establish a unit attention condition when
+ * a command is completed with BUSY, TASK SET FULL, or RESERVATION
+ * CONFLICT status.
+ *
+ * 11b a The logical unit shall not clear any unit attention condition
+ * reported in the same I_T_L_Q nexus transaction as a CHECK CONDITION
+ * status and shall establish a unit attention condition for the
+ * initiator port associated with the I_T nexus on which the BUSY,
+ * TASK SET FULL, or RESERVATION CONFLICT status is being returned.
+ * Depending on the status, the additional sense code shall be set to
+ * PREVIOUS BUSY STATUS, PREVIOUS TASK SET FULL STATUS, or PREVIOUS
+ * RESERVATION CONFLICT STATUS. Until it is cleared by a REQUEST SENSE
+ * command, a unit attention condition shall be established only once
+ * for a BUSY, TASK SET FULL, or RESERVATION CONFLICT status regardless
+ * to the number of commands completed with one of those status codes.
+ */
+ p[4] = (DEV_ATTRIB(dev)->emulate_ua_intlck_ctrl == 2) ? 0x30 :
+ (DEV_ATTRIB(dev)->emulate_ua_intlck_ctrl == 1) ? 0x20 : 0x00;
+ /*
+ * From spc4r17, section 7.4.6 Control mode Page
+ *
+ * Task Aborted Status (TAS) bit set to zero.
+ *
+ * A task aborted status (TAS) bit set to zero specifies that aborted
+ * tasks shall be terminated by the device server without any response
+ * to the application client. A TAS bit set to one specifies that tasks
+ * aborted by the actions of an I_T nexus other than the I_T nexus on
+ * which the command was received shall be completed with TASK ABORTED
+ * status (see SAM-4).
+ */
+ p[5] = (DEV_ATTRIB(dev)->emulate_tas) ? 0x40 : 0x00;
+ p[8] = 0xff;
+ p[9] = 0xff;
+ p[11] = 30;
+
+ return 12;
+}
+
+static int
+target_modesense_caching(struct se_device *dev, unsigned char *p)
+{
+ p[0] = 0x08;
+ p[1] = 0x12;
+ if (DEV_ATTRIB(dev)->emulate_write_cache > 0)
+ p[2] = 0x04; /* Write Cache Enable */
+ p[12] = 0x20; /* Disabled Read Ahead */
+
+ return 20;
+}
+
+static void
+target_modesense_write_protect(unsigned char *buf, int type)
+{
+ /*
+ * I believe that the WP bit (bit 7) in the mode header is the same for
+ * all device types..
+ */
+ switch (type) {
+ case TYPE_DISK:
+ case TYPE_TAPE:
+ default:
+ buf[0] |= 0x80; /* WP bit */
+ break;
+ }
+}
+
+static void
+target_modesense_dpofua(unsigned char *buf, int type)
+{
+ switch (type) {
+ case TYPE_DISK:
+ buf[0] |= 0x10; /* DPOFUA bit */
+ break;
+ default:
+ break;
+ }
+}
+
+static int
+target_emulate_modesense(struct se_cmd *cmd, int ten)
+{
+ struct se_device *dev = SE_DEV(cmd);
+ char *cdb = cmd->t_task->t_task_cdb;
+ unsigned char *rbuf = cmd->t_task->t_task_buf;
+ int type = dev->transport->get_device_type(dev);
+ int offset = (ten) ? 8 : 4;
+ int length = 0;
+ unsigned char buf[SE_MODE_PAGE_BUF];
+
+ memset(buf, 0, SE_MODE_PAGE_BUF);
+
+ switch (cdb[2] & 0x3f) {
+ case 0x01:
+ length = target_modesense_rwrecovery(&buf[offset]);
+ break;
+ case 0x08:
+ length = target_modesense_caching(dev, &buf[offset]);
+ break;
+ case 0x0a:
+ length = target_modesense_control(dev, &buf[offset]);
+ break;
+ case 0x3f:
+ length = target_modesense_rwrecovery(&buf[offset]);
+ length += target_modesense_caching(dev, &buf[offset+length]);
+ length += target_modesense_control(dev, &buf[offset+length]);
+ break;
+ default:
+ printk(KERN_ERR "Got Unknown Mode Page: 0x%02x\n",
+ cdb[2] & 0x3f);
+ return PYX_TRANSPORT_UNKNOWN_MODE_PAGE;
+ }
+ offset += length;
+
+ if (ten) {
+ offset -= 2;
+ buf[0] = (offset >> 8) & 0xff;
+ buf[1] = offset & 0xff;
+
+ if ((SE_LUN(cmd)->lun_access & TRANSPORT_LUNFLAGS_READ_ONLY) ||
+ (cmd->se_deve &&
+ (cmd->se_deve->lun_flags & TRANSPORT_LUNFLAGS_READ_ONLY)))
+ target_modesense_write_protect(&buf[3], type);
+
+ if ((DEV_ATTRIB(dev)->emulate_write_cache > 0) &&
+ (DEV_ATTRIB(dev)->emulate_fua_write > 0))
+ target_modesense_dpofua(&buf[3], type);
+
+ if ((offset + 2) > cmd->data_length)
+ offset = cmd->data_length;
+
+ } else {
+ offset -= 1;
+ buf[0] = offset & 0xff;
+
+ if ((SE_LUN(cmd)->lun_access & TRANSPORT_LUNFLAGS_READ_ONLY) ||
+ (cmd->se_deve &&
+ (cmd->se_deve->lun_flags & TRANSPORT_LUNFLAGS_READ_ONLY)))
+ target_modesense_write_protect(&buf[2], type);
+
+ if ((DEV_ATTRIB(dev)->emulate_write_cache > 0) &&
+ (DEV_ATTRIB(dev)->emulate_fua_write > 0))
+ target_modesense_dpofua(&buf[2], type);
+
+ if ((offset + 1) > cmd->data_length)
+ offset = cmd->data_length;
+ }
+ memcpy(rbuf, buf, offset);
+
+ return 0;
+}
+
+static int
+target_emulate_request_sense(struct se_cmd *cmd)
+{
+ unsigned char *cdb = cmd->t_task->t_task_cdb;
+ unsigned char *buf = cmd->t_task->t_task_buf;
+ u8 ua_asc = 0, ua_ascq = 0;
+
+ if (cdb[1] & 0x01) {
+ printk(KERN_ERR "REQUEST_SENSE description emulation not"
+ " supported\n");
+ return PYX_TRANSPORT_INVALID_CDB_FIELD;
+ }
+ if (!(core_scsi3_ua_clear_for_request_sense(cmd, &ua_asc, &ua_ascq))) {
+ /*
+ * CURRENT ERROR, UNIT ATTENTION
+ */
+ buf[0] = 0x70;
+ buf[SPC_SENSE_KEY_OFFSET] = UNIT_ATTENTION;
+ /*
+ * Make sure request data length is enough for additional
+ * sense data.
+ */
+ if (cmd->data_length <= 18) {
+ buf[7] = 0x00;
+ return 0;
+ }
+ /*
+ * The Additional Sense Code (ASC) from the UNIT ATTENTION
+ */
+ buf[SPC_ASC_KEY_OFFSET] = ua_asc;
+ buf[SPC_ASCQ_KEY_OFFSET] = ua_ascq;
+ buf[7] = 0x0A;
+ } else {
+ /*
+ * CURRENT ERROR, NO SENSE
+ */
+ buf[0] = 0x70;
+ buf[SPC_SENSE_KEY_OFFSET] = NO_SENSE;
+ /*
+ * Make sure request data length is enough for additional
+ * sense data.
+ */
+ if (cmd->data_length <= 18) {
+ buf[7] = 0x00;
+ return 0;
+ }
+ /*
+ * NO ADDITIONAL SENSE INFORMATION
+ */
+ buf[SPC_ASC_KEY_OFFSET] = 0x00;
+ buf[7] = 0x0A;
+ }
+
+ return 0;
+}
+
+/*
+ * Used for TCM/IBLOCK and TCM/FILEIO for block/blk-lib.c level discard support.
+ * Note this is not used for TCM/pSCSI passthrough
+ */
+static int
+target_emulate_unmap(struct se_task *task)
+{
+ struct se_cmd *cmd = TASK_CMD(task);
+ struct se_device *dev = SE_DEV(cmd);
+ unsigned char *buf = cmd->t_task->t_task_buf, *ptr = NULL;
+ unsigned char *cdb = &cmd->t_task->t_task_cdb[0];
+ sector_t lba;
+ unsigned int size = cmd->data_length, range;
+ int ret, offset;
+ unsigned short dl, bd_dl;
+
+ /* First UNMAP block descriptor starts at 8 byte offset */
+ offset = 8;
+ size -= 8;
+ dl = get_unaligned_be16(&cdb[0]);
+ bd_dl = get_unaligned_be16(&cdb[2]);
+ ptr = &buf[offset];
+ printk(KERN_INFO "UNMAP: Sub: %s Using dl: %hu bd_dl: %hu size: %hu"
+ " ptr: %p\n", dev->transport->name, dl, bd_dl, size, ptr);
+
+ while (size) {
+ lba = get_unaligned_be64(&ptr[0]);
+ range = get_unaligned_be32(&ptr[8]);
+ printk(KERN_INFO "UNMAP: Using lba: %llu and range: %u\n",
+ (unsigned long long)lba, range);
+
+ ret = dev->transport->do_discard(dev, lba, range);
+ if (ret < 0) {
+ printk(KERN_ERR "blkdev_issue_discard() failed: %d\n",
+ ret);
+ return -1;
+ }
+
+ ptr += 16;
+ size -= 16;
+ }
+
+ task->task_scsi_status = GOOD;
+ transport_complete_task(task, 1);
+ return 0;
+}
+
+/*
+ * Used for TCM/IBLOCK and TCM/FILEIO for block/blk-lib.c level discard support.
+ * Note this is not used for TCM/pSCSI passthrough
+ */
+static int
+target_emulate_write_same(struct se_task *task)
+{
+ struct se_cmd *cmd = TASK_CMD(task);
+ struct se_device *dev = SE_DEV(cmd);
+ sector_t lba = cmd->t_task->t_task_lba;
+ unsigned int range;
+ int ret;
+
+ range = (cmd->data_length / DEV_ATTRIB(dev)->block_size);
+
+ printk(KERN_INFO "WRITE_SAME UNMAP: LBA: %llu Range: %u\n",
+ (unsigned long long)lba, range);
+
+ ret = dev->transport->do_discard(dev, lba, range);
+ if (ret < 0) {
+ printk(KERN_INFO "blkdev_issue_discard() failed for WRITE_SAME\n");
+ return -1;
+ }
+
+ task->task_scsi_status = GOOD;
+ transport_complete_task(task, 1);
+ return 0;
+}
+
+int
+transport_emulate_control_cdb(struct se_task *task)
+{
+ struct se_cmd *cmd = TASK_CMD(task);
+ struct se_device *dev = SE_DEV(cmd);
+ unsigned short service_action;
+ int ret = 0;
+
+ switch (cmd->t_task->t_task_cdb[0]) {
+ case INQUIRY:
+ ret = target_emulate_inquiry(cmd);
+ break;
+ case READ_CAPACITY:
+ ret = target_emulate_readcapacity(cmd);
+ break;
+ case MODE_SENSE:
+ ret = target_emulate_modesense(cmd, 0);
+ break;
+ case MODE_SENSE_10:
+ ret = target_emulate_modesense(cmd, 1);
+ break;
+ case SERVICE_ACTION_IN:
+ switch (cmd->t_task->t_task_cdb[1] & 0x1f) {
+ case SAI_READ_CAPACITY_16:
+ ret = target_emulate_readcapacity_16(cmd);
+ break;
+ default:
+ printk(KERN_ERR "Unsupported SA: 0x%02x\n",
+ cmd->t_task->t_task_cdb[1] & 0x1f);
+ return PYX_TRANSPORT_UNKNOWN_SAM_OPCODE;
+ }
+ break;
+ case REQUEST_SENSE:
+ ret = target_emulate_request_sense(cmd);
+ break;
+ case UNMAP:
+ if (!dev->transport->do_discard) {
+ printk(KERN_ERR "UNMAP emulation not supported for: %s\n",
+ dev->transport->name);
+ return PYX_TRANSPORT_UNKNOWN_SAM_OPCODE;
+ }
+ ret = target_emulate_unmap(task);
+ break;
+ case WRITE_SAME_16:
+ if (!dev->transport->do_discard) {
+ printk(KERN_ERR "WRITE_SAME_16 emulation not supported"
+ " for: %s\n", dev->transport->name);
+ return PYX_TRANSPORT_UNKNOWN_SAM_OPCODE;
+ }
+ ret = target_emulate_write_same(task);
+ break;
+ case VARIABLE_LENGTH_CMD:
+ service_action =
+ get_unaligned_be16(&cmd->t_task->t_task_cdb[8]);
+ switch (service_action) {
+ case WRITE_SAME_32:
+ if (!dev->transport->do_discard) {
+ printk(KERN_ERR "WRITE_SAME_32 SA emulation not"
+ " supported for: %s\n",
+ dev->transport->name);
+ return PYX_TRANSPORT_UNKNOWN_SAM_OPCODE;
+ }
+ ret = target_emulate_write_same(task);
+ break;
+ default:
+ printk(KERN_ERR "Unsupported VARIABLE_LENGTH_CMD SA:"
+ " 0x%02x\n", service_action);
+ break;
+ }
+ break;
+ case SYNCHRONIZE_CACHE:
+ case 0x91: /* SYNCHRONIZE_CACHE_16: */
+ if (!dev->transport->do_sync_cache) {
+ printk(KERN_ERR
+ "SYNCHRONIZE_CACHE emulation not supported"
+ " for: %s\n", dev->transport->name);
+ return PYX_TRANSPORT_UNKNOWN_SAM_OPCODE;
+ }
+ dev->transport->do_sync_cache(task);
+ break;
+ case ALLOW_MEDIUM_REMOVAL:
+ case ERASE:
+ case REZERO_UNIT:
+ case SEEK_10:
+ case SPACE:
+ case START_STOP:
+ case TEST_UNIT_READY:
+ case VERIFY:
+ case WRITE_FILEMARKS:
+ break;
+ default:
+ printk(KERN_ERR "Unsupported SCSI Opcode: 0x%02x for %s\n",
+ cmd->t_task->t_task_cdb[0], dev->transport->name);
+ return PYX_TRANSPORT_UNKNOWN_SAM_OPCODE;
+ }
+
+ if (ret < 0)
+ return ret;
+ task->task_scsi_status = GOOD;
+ transport_complete_task(task, 1);
+
+ return PYX_TRANSPORT_SENT_TO_TRANSPORT;
+}
diff --git a/drivers/target/target_core_scdb.c b/drivers/target/target_core_scdb.c
new file mode 100644
index 0000000..dc6fed0
--- /dev/null
+++ b/drivers/target/target_core_scdb.c
@@ -0,0 +1,105 @@
+/*******************************************************************************
+ * Filename: target_core_scdb.c
+ *
+ * This file contains the generic target engine Split CDB related functions.
+ *
+ * Copyright (c) 2004-2005 PyX Technologies, Inc.
+ * Copyright (c) 2005, 2006, 2007 SBE, Inc.
+ * Copyright (c) 2007-2010 Rising Tide Systems
+ * Copyright (c) 2008-2010 Linux-iSCSI.org
+ *
+ * Nicholas A. Bellinger <nab@kernel.org>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+ *
+ ******************************************************************************/
+
+#include <linux/net.h>
+#include <linux/string.h>
+#include <scsi/scsi.h>
+#include <asm/unaligned.h>
+
+#include <target/target_core_base.h>
+#include <target/target_core_transport.h>
+
+#include "target_core_scdb.h"
+
+/* split_cdb_XX_6():
+ *
+ * 21-bit LBA w/ 8-bit SECTORS
+ */
+void split_cdb_XX_6(
+ unsigned long long lba,
+ u32 *sectors,
+ unsigned char *cdb)
+{
+ cdb[1] = (lba >> 16) & 0x1f;
+ cdb[2] = (lba >> 8) & 0xff;
+ cdb[3] = lba & 0xff;
+ cdb[4] = *sectors & 0xff;
+}
+
+/* split_cdb_XX_10():
+ *
+ * 32-bit LBA w/ 16-bit SECTORS
+ */
+void split_cdb_XX_10(
+ unsigned long long lba,
+ u32 *sectors,
+ unsigned char *cdb)
+{
+ put_unaligned_be32(lba, &cdb[2]);
+ put_unaligned_be16(*sectors, &cdb[7]);
+}
+
+/* split_cdb_XX_12():
+ *
+ * 32-bit LBA w/ 32-bit SECTORS
+ */
+void split_cdb_XX_12(
+ unsigned long long lba,
+ u32 *sectors,
+ unsigned char *cdb)
+{
+ put_unaligned_be32(lba, &cdb[2]);
+ put_unaligned_be32(*sectors, &cdb[6]);
+}
+
+/* split_cdb_XX_16():
+ *
+ * 64-bit LBA w/ 32-bit SECTORS
+ */
+void split_cdb_XX_16(
+ unsigned long long lba,
+ u32 *sectors,
+ unsigned char *cdb)
+{
+ put_unaligned_be64(lba, &cdb[2]);
+ put_unaligned_be32(*sectors, &cdb[10]);
+}
+
+/*
+ * split_cdb_XX_32():
+ *
+ * 64-bit LBA w/ 32-bit SECTORS such as READ_32, WRITE_32 and emulated XDWRITEREAD_32
+ */
+void split_cdb_XX_32(
+ unsigned long long lba,
+ u32 *sectors,
+ unsigned char *cdb)
+{
+ put_unaligned_be64(lba, &cdb[12]);
+ put_unaligned_be32(*sectors, &cdb[28]);
+}
diff --git a/drivers/target/target_core_scdb.h b/drivers/target/target_core_scdb.h
new file mode 100644
index 0000000..98cd1c0
--- /dev/null
+++ b/drivers/target/target_core_scdb.h
@@ -0,0 +1,10 @@
+#ifndef TARGET_CORE_SCDB_H
+#define TARGET_CORE_SCDB_H
+
+extern void split_cdb_XX_6(unsigned long long, u32 *, unsigned char *);
+extern void split_cdb_XX_10(unsigned long long, u32 *, unsigned char *);
+extern void split_cdb_XX_12(unsigned long long, u32 *, unsigned char *);
+extern void split_cdb_XX_16(unsigned long long, u32 *, unsigned char *);
+extern void split_cdb_XX_32(unsigned long long, u32 *, unsigned char *);
+
+#endif /* TARGET_CORE_SCDB_H */
diff --git a/drivers/target/target_core_transport.c b/drivers/target/target_core_transport.c
new file mode 100644
index 0000000..75972bc
--- /dev/null
+++ b/drivers/target/target_core_transport.c
@@ -0,0 +1,6133 @@
+/*******************************************************************************
+ * Filename: target_core_transport.c
+ *
+ * This file contains the Generic Target Engine Core.
+ *
+ * Copyright (c) 2002, 2003, 2004, 2005 PyX Technologies, Inc.
+ * Copyright (c) 2005, 2006, 2007 SBE, Inc.
+ * Copyright (c) 2007-2010 Rising Tide Systems
+ * Copyright (c) 2008-2010 Linux-iSCSI.org
+ *
+ * Nicholas A. Bellinger <nab@kernel.org>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+ *
+ ******************************************************************************/
+
+#include <linux/version.h>
+#include <linux/net.h>
+#include <linux/delay.h>
+#include <linux/string.h>
+#include <linux/timer.h>
+#include <linux/slab.h>
+#include <linux/blkdev.h>
+#include <linux/spinlock.h>
+#include <linux/smp_lock.h>
+#include <linux/kthread.h>
+#include <linux/in.h>
+#include <linux/cdrom.h>
+#include <asm/unaligned.h>
+#include <net/sock.h>
+#include <net/tcp.h>
+#include <scsi/scsi.h>
+#include <scsi/scsi_cmnd.h>
+#include <scsi/libsas.h> /* For TASK_ATTR_* */
+
+#include <target/target_core_base.h>
+#include <target/target_core_device.h>
+#include <target/target_core_tmr.h>
+#include <target/target_core_tpg.h>
+#include <target/target_core_transport.h>
+#include <target/target_core_fabric_ops.h>
+#include <target/target_core_configfs.h>
+
+#include "target_core_alua.h"
+#include "target_core_hba.h"
+#include "target_core_pr.h"
+#include "target_core_scdb.h"
+#include "target_core_ua.h"
+
+/* #define DEBUG_CDB_HANDLER */
+#ifdef DEBUG_CDB_HANDLER
+#define DEBUG_CDB_H(x...) printk(KERN_INFO x)
+#else
+#define DEBUG_CDB_H(x...)
+#endif
+
+/* #define DEBUG_CMD_MAP */
+#ifdef DEBUG_CMD_MAP
+#define DEBUG_CMD_M(x...) printk(KERN_INFO x)
+#else
+#define DEBUG_CMD_M(x...)
+#endif
+
+/* #define DEBUG_MEM_ALLOC */
+#ifdef DEBUG_MEM_ALLOC
+#define DEBUG_MEM(x...) printk(KERN_INFO x)
+#else
+#define DEBUG_MEM(x...)
+#endif
+
+/* #define DEBUG_MEM2_ALLOC */
+#ifdef DEBUG_MEM2_ALLOC
+#define DEBUG_MEM2(x...) printk(KERN_INFO x)
+#else
+#define DEBUG_MEM2(x...)
+#endif
+
+/* #define DEBUG_SG_CALC */
+#ifdef DEBUG_SG_CALC
+#define DEBUG_SC(x...) printk(KERN_INFO x)
+#else
+#define DEBUG_SC(x...)
+#endif
+
+/* #define DEBUG_SE_OBJ */
+#ifdef DEBUG_SE_OBJ
+#define DEBUG_SO(x...) printk(KERN_INFO x)
+#else
+#define DEBUG_SO(x...)
+#endif
+
+/* #define DEBUG_CMD_VOL */
+#ifdef DEBUG_CMD_VOL
+#define DEBUG_VOL(x...) printk(KERN_INFO x)
+#else
+#define DEBUG_VOL(x...)
+#endif
+
+/* #define DEBUG_CMD_STOP */
+#ifdef DEBUG_CMD_STOP
+#define DEBUG_CS(x...) printk(KERN_INFO x)
+#else
+#define DEBUG_CS(x...)
+#endif
+
+/* #define DEBUG_PASSTHROUGH */
+#ifdef DEBUG_PASSTHROUGH
+#define DEBUG_PT(x...) printk(KERN_INFO x)
+#else
+#define DEBUG_PT(x...)
+#endif
+
+/* #define DEBUG_TASK_STOP */
+#ifdef DEBUG_TASK_STOP
+#define DEBUG_TS(x...) printk(KERN_INFO x)
+#else
+#define DEBUG_TS(x...)
+#endif
+
+/* #define DEBUG_TRANSPORT_STOP */
+#ifdef DEBUG_TRANSPORT_STOP
+#define DEBUG_TRANSPORT_S(x...) printk(KERN_INFO x)
+#else
+#define DEBUG_TRANSPORT_S(x...)
+#endif
+
+/* #define DEBUG_TASK_FAILURE */
+#ifdef DEBUG_TASK_FAILURE
+#define DEBUG_TF(x...) printk(KERN_INFO x)
+#else
+#define DEBUG_TF(x...)
+#endif
+
+/* #define DEBUG_DEV_OFFLINE */
+#ifdef DEBUG_DEV_OFFLINE
+#define DEBUG_DO(x...) printk(KERN_INFO x)
+#else
+#define DEBUG_DO(x...)
+#endif
+
+/* #define DEBUG_TASK_STATE */
+#ifdef DEBUG_TASK_STATE
+#define DEBUG_TSTATE(x...) printk(KERN_INFO x)
+#else
+#define DEBUG_TSTATE(x...)
+#endif
+
+/* #define DEBUG_STATUS_THR */
+#ifdef DEBUG_STATUS_THR
+#define DEBUG_ST(x...) printk(KERN_INFO x)
+#else
+#define DEBUG_ST(x...)
+#endif
+
+/* #define DEBUG_TASK_TIMEOUT */
+#ifdef DEBUG_TASK_TIMEOUT
+#define DEBUG_TT(x...) printk(KERN_INFO x)
+#else
+#define DEBUG_TT(x...)
+#endif
+
+/* #define DEBUG_GENERIC_REQUEST_FAILURE */
+#ifdef DEBUG_GENERIC_REQUEST_FAILURE
+#define DEBUG_GRF(x...) printk(KERN_INFO x)
+#else
+#define DEBUG_GRF(x...)
+#endif
+
+/* #define DEBUG_SAM_TASK_ATTRS */
+#ifdef DEBUG_SAM_TASK_ATTRS
+#define DEBUG_STA(x...) printk(KERN_INFO x)
+#else
+#define DEBUG_STA(x...)
+#endif
+
+struct se_global *se_global;
+
+static struct kmem_cache *se_cmd_cache;
+static struct kmem_cache *se_sess_cache;
+struct kmem_cache *se_tmr_req_cache;
+struct kmem_cache *se_ua_cache;
+struct kmem_cache *se_mem_cache;
+struct kmem_cache *t10_pr_reg_cache;
+struct kmem_cache *t10_alua_lu_gp_cache;
+struct kmem_cache *t10_alua_lu_gp_mem_cache;
+struct kmem_cache *t10_alua_tg_pt_gp_cache;
+struct kmem_cache *t10_alua_tg_pt_gp_mem_cache;
+
+/* Used for transport_dev_get_map_*() */
+typedef int (*map_func_t)(struct se_task *, u32);
+
+static int transport_generic_write_pending(struct se_cmd *);
+static int transport_processing_thread(void *);
+static int __transport_execute_tasks(struct se_device *dev);
+static void transport_complete_task_attr(struct se_cmd *cmd);
+static void transport_direct_request_timeout(struct se_cmd *cmd);
+static void transport_free_dev_tasks(struct se_cmd *cmd);
+static u32 transport_generic_get_cdb_count(struct se_cmd *cmd,
+ unsigned long long starting_lba, u32 sectors,
+ enum dma_data_direction data_direction,
+ struct list_head *mem_list, int set_counts);
+static int transport_generic_get_mem(struct se_cmd *cmd, u32 length,
+ u32 dma_size);
+static int transport_generic_remove(struct se_cmd *cmd,
+ int release_to_pool, int session_reinstatement);
+static int transport_get_sectors(struct se_cmd *cmd);
+static struct list_head *transport_init_se_mem_list(void);
+static int transport_map_sg_to_mem(struct se_cmd *cmd,
+ struct list_head *se_mem_list, void *in_mem,
+ u32 *se_mem_cnt);
+static void transport_memcpy_se_mem_read_contig(struct se_cmd *cmd,
+ unsigned char *dst, struct list_head *se_mem_list);
+static void transport_new_cmd_failure(struct se_cmd *se_cmd);
+static void transport_release_fe_cmd(struct se_cmd *cmd);
+static void transport_remove_cmd_from_queue(struct se_cmd *cmd,
+ struct se_queue_obj *qobj);
+static int transport_set_sense_codes(struct se_cmd *cmd, u8 asc, u8 ascq);
+static void transport_stop_all_task_timers(struct se_cmd *cmd);
+
+int transport_emulate_control_cdb(struct se_task *task);
+
+int init_se_global(void)
+{
+ struct se_global *global;
+
+ global = kzalloc(sizeof(struct se_global), GFP_KERNEL);
+ if (!(global)) {
+ printk(KERN_ERR "Unable to allocate memory for struct se_global\n");
+ return -1;
+ }
+
+ INIT_LIST_HEAD(&global->g_lu_gps_list);
+ INIT_LIST_HEAD(&global->g_se_tpg_list);
+ INIT_LIST_HEAD(&global->g_hba_list);
+ INIT_LIST_HEAD(&global->g_se_dev_list);
+ spin_lock_init(&global->g_device_lock);
+ spin_lock_init(&global->hba_lock);
+ spin_lock_init(&global->se_tpg_lock);
+ spin_lock_init(&global->lu_gps_lock);
+ spin_lock_init(&global->plugin_class_lock);
+
+ se_cmd_cache = kmem_cache_create("se_cmd_cache",
+ sizeof(struct se_cmd), __alignof__(struct se_cmd), 0, NULL);
+ if (!(se_cmd_cache)) {
+ printk(KERN_ERR "kmem_cache_create for struct se_cmd failed\n");
+ goto out;
+ }
+ se_tmr_req_cache = kmem_cache_create("se_tmr_cache",
+ sizeof(struct se_tmr_req), __alignof__(struct se_tmr_req),
+ 0, NULL);
+ if (!(se_tmr_req_cache)) {
+ printk(KERN_ERR "kmem_cache_create() for struct se_tmr_req"
+ " failed\n");
+ goto out;
+ }
+ se_sess_cache = kmem_cache_create("se_sess_cache",
+ sizeof(struct se_session), __alignof__(struct se_session),
+ 0, NULL);
+ if (!(se_sess_cache)) {
+ printk(KERN_ERR "kmem_cache_create() for struct se_session"
+ " failed\n");
+ goto out;
+ }
+ se_ua_cache = kmem_cache_create("se_ua_cache",
+ sizeof(struct se_ua), __alignof__(struct se_ua),
+ 0, NULL);
+ if (!(se_ua_cache)) {
+ printk(KERN_ERR "kmem_cache_create() for struct se_ua failed\n");
+ goto out;
+ }
+ se_mem_cache = kmem_cache_create("se_mem_cache",
+ sizeof(struct se_mem), __alignof__(struct se_mem), 0, NULL);
+ if (!(se_mem_cache)) {
+ printk(KERN_ERR "kmem_cache_create() for struct se_mem failed\n");
+ goto out;
+ }
+ t10_pr_reg_cache = kmem_cache_create("t10_pr_reg_cache",
+ sizeof(struct t10_pr_registration),
+ __alignof__(struct t10_pr_registration), 0, NULL);
+ if (!(t10_pr_reg_cache)) {
+ printk(KERN_ERR "kmem_cache_create() for struct t10_pr_registration"
+ " failed\n");
+ goto out;
+ }
+ t10_alua_lu_gp_cache = kmem_cache_create("t10_alua_lu_gp_cache",
+ sizeof(struct t10_alua_lu_gp), __alignof__(struct t10_alua_lu_gp),
+ 0, NULL);
+ if (!(t10_alua_lu_gp_cache)) {
+ printk(KERN_ERR "kmem_cache_create() for t10_alua_lu_gp_cache"
+ " failed\n");
+ goto out;
+ }
+ t10_alua_lu_gp_mem_cache = kmem_cache_create("t10_alua_lu_gp_mem_cache",
+ sizeof(struct t10_alua_lu_gp_member),
+ __alignof__(struct t10_alua_lu_gp_member), 0, NULL);
+ if (!(t10_alua_lu_gp_mem_cache)) {
+ printk(KERN_ERR "kmem_cache_create() for t10_alua_lu_gp_mem_"
+ "cache failed\n");
+ goto out;
+ }
+ t10_alua_tg_pt_gp_cache = kmem_cache_create("t10_alua_tg_pt_gp_cache",
+ sizeof(struct t10_alua_tg_pt_gp),
+ __alignof__(struct t10_alua_tg_pt_gp), 0, NULL);
+ if (!(t10_alua_tg_pt_gp_cache)) {
+ printk(KERN_ERR "kmem_cache_create() for t10_alua_tg_pt_gp_"
+ "cache failed\n");
+ goto out;
+ }
+ t10_alua_tg_pt_gp_mem_cache = kmem_cache_create(
+ "t10_alua_tg_pt_gp_mem_cache",
+ sizeof(struct t10_alua_tg_pt_gp_member),
+ __alignof__(struct t10_alua_tg_pt_gp_member),
+ 0, NULL);
+ if (!(t10_alua_tg_pt_gp_mem_cache)) {
+ printk(KERN_ERR "kmem_cache_create() for t10_alua_tg_pt_gp_"
+ "mem_t failed\n");
+ goto out;
+ }
+
+ se_global = global;
+
+ return 0;
+out:
+ if (se_cmd_cache)
+ kmem_cache_destroy(se_cmd_cache);
+ if (se_tmr_req_cache)
+ kmem_cache_destroy(se_tmr_req_cache);
+ if (se_sess_cache)
+ kmem_cache_destroy(se_sess_cache);
+ if (se_ua_cache)
+ kmem_cache_destroy(se_ua_cache);
+ if (se_mem_cache)
+ kmem_cache_destroy(se_mem_cache);
+ if (t10_pr_reg_cache)
+ kmem_cache_destroy(t10_pr_reg_cache);
+ if (t10_alua_lu_gp_cache)
+ kmem_cache_destroy(t10_alua_lu_gp_cache);
+ if (t10_alua_lu_gp_mem_cache)
+ kmem_cache_destroy(t10_alua_lu_gp_mem_cache);
+ if (t10_alua_tg_pt_gp_cache)
+ kmem_cache_destroy(t10_alua_tg_pt_gp_cache);
+ if (t10_alua_tg_pt_gp_mem_cache)
+ kmem_cache_destroy(t10_alua_tg_pt_gp_mem_cache);
+ kfree(global);
+ return -1;
+}
+
+void release_se_global(void)
+{
+ struct se_global *global;
+
+ global = se_global;
+ if (!(global))
+ return;
+
+ kmem_cache_destroy(se_cmd_cache);
+ kmem_cache_destroy(se_tmr_req_cache);
+ kmem_cache_destroy(se_sess_cache);
+ kmem_cache_destroy(se_ua_cache);
+ kmem_cache_destroy(se_mem_cache);
+ kmem_cache_destroy(t10_pr_reg_cache);
+ kmem_cache_destroy(t10_alua_lu_gp_cache);
+ kmem_cache_destroy(t10_alua_lu_gp_mem_cache);
+ kmem_cache_destroy(t10_alua_tg_pt_gp_cache);
+ kmem_cache_destroy(t10_alua_tg_pt_gp_mem_cache);
+ kfree(global);
+
+ se_global = NULL;
+}
+
+void transport_init_queue_obj(struct se_queue_obj *qobj)
+{
+ atomic_set(&qobj->queue_cnt, 0);
+ INIT_LIST_HEAD(&qobj->qobj_list);
+ init_waitqueue_head(&qobj->thread_wq);
+ spin_lock_init(&qobj->cmd_queue_lock);
+}
+EXPORT_SYMBOL(transport_init_queue_obj);
+
+static int transport_subsystem_reqmods(void)
+{
+ int ret;
+
+ ret = request_module("target_core_iblock");
+ if (ret != 0)
+ printk(KERN_ERR "Unable to load target_core_iblock\n");
+
+ ret = request_module("target_core_file");
+ if (ret != 0)
+ printk(KERN_ERR "Unable to load target_core_file\n");
+
+ ret = request_module("target_core_pscsi");
+ if (ret != 0)
+ printk(KERN_ERR "Unable to load target_core_pscsi\n");
+
+ ret = request_module("target_core_stgt");
+ if (ret != 0)
+ printk(KERN_ERR "Unable to load target_core_stgt\n");
+
+ return 0;
+}
+
+int transport_subsystem_check_init(void)
+{
+ if (se_global->g_sub_api_initialized)
+ return 0;
+ /*
+ * Request the loading of known TCM subsystem plugins..
+ */
+ if (transport_subsystem_reqmods() < 0)
+ return -1;
+
+ se_global->g_sub_api_initialized = 1;
+ return 0;
+}
+
+struct se_session *transport_init_session(void)
+{
+ struct se_session *se_sess;
+
+ se_sess = kmem_cache_zalloc(se_sess_cache, GFP_KERNEL);
+ if (!(se_sess)) {
+ printk(KERN_ERR "Unable to allocate struct se_session from"
+ " se_sess_cache\n");
+ return ERR_PTR(-ENOMEM);
+ }
+ INIT_LIST_HEAD(&se_sess->sess_list);
+ INIT_LIST_HEAD(&se_sess->sess_acl_list);
+ atomic_set(&se_sess->mib_ref_count, 0);
+
+ return se_sess;
+}
+EXPORT_SYMBOL(transport_init_session);
+
+/*
+ * Called with spin_lock_bh(&struct se_portal_group->session_lock called.
+ */
+void __transport_register_session(
+ struct se_portal_group *se_tpg,
+ struct se_node_acl *se_nacl,
+ struct se_session *se_sess,
+ void *fabric_sess_ptr)
+{
+ unsigned char buf[PR_REG_ISID_LEN];
+
+ se_sess->se_tpg = se_tpg;
+ se_sess->fabric_sess_ptr = fabric_sess_ptr;
+ /*
+ * Used by struct se_node_acl's under ConfigFS to locate active se_session-t
+ *
+ * Only set for struct se_session's that will actually be moving I/O.
+ * eg: *NOT* discovery sessions.
+ */
+ if (se_nacl) {
+ /*
+ * If the fabric module supports an ISID based TransportID,
+ * save this value in binary from the fabric I_T Nexus now.
+ */
+ if (TPG_TFO(se_tpg)->sess_get_initiator_sid != NULL) {
+ memset(&buf[0], 0, PR_REG_ISID_LEN);
+ TPG_TFO(se_tpg)->sess_get_initiator_sid(se_sess,
+ &buf[0], PR_REG_ISID_LEN);
+ se_sess->sess_bin_isid = get_unaligned_be64(&buf[0]);
+ }
+ spin_lock_irq(&se_nacl->nacl_sess_lock);
+ /*
+ * The se_nacl->nacl_sess pointer will be set to the
+ * last active I_T Nexus for each struct se_node_acl.
+ */
+ se_nacl->nacl_sess = se_sess;
+
+ list_add_tail(&se_sess->sess_acl_list,
+ &se_nacl->acl_sess_list);
+ spin_unlock_irq(&se_nacl->nacl_sess_lock);
+ }
+ list_add_tail(&se_sess->sess_list, &se_tpg->tpg_sess_list);
+
+ printk(KERN_INFO "TARGET_CORE[%s]: Registered fabric_sess_ptr: %p\n",
+ TPG_TFO(se_tpg)->get_fabric_name(), se_sess->fabric_sess_ptr);
+}
+EXPORT_SYMBOL(__transport_register_session);
+
+void transport_register_session(
+ struct se_portal_group *se_tpg,
+ struct se_node_acl *se_nacl,
+ struct se_session *se_sess,
+ void *fabric_sess_ptr)
+{
+ spin_lock_bh(&se_tpg->session_lock);
+ __transport_register_session(se_tpg, se_nacl, se_sess, fabric_sess_ptr);
+ spin_unlock_bh(&se_tpg->session_lock);
+}
+EXPORT_SYMBOL(transport_register_session);
+
+void transport_deregister_session_configfs(struct se_session *se_sess)
+{
+ struct se_node_acl *se_nacl;
+
+ /*
+ * Used by struct se_node_acl's under ConfigFS to locate active struct se_session
+ */
+ se_nacl = se_sess->se_node_acl;
+ if ((se_nacl)) {
+ spin_lock_irq(&se_nacl->nacl_sess_lock);
+ list_del(&se_sess->sess_acl_list);
+ /*
+ * If the session list is empty, then clear the pointer.
+ * Otherwise, set the struct se_session pointer from the tail
+ * element of the per struct se_node_acl active session list.
+ */
+ if (list_empty(&se_nacl->acl_sess_list))
+ se_nacl->nacl_sess = NULL;
+ else {
+ se_nacl->nacl_sess = container_of(
+ se_nacl->acl_sess_list.prev,
+ struct se_session, sess_acl_list);
+ }
+ spin_unlock_irq(&se_nacl->nacl_sess_lock);
+ }
+}
+EXPORT_SYMBOL(transport_deregister_session_configfs);
+
+void transport_free_session(struct se_session *se_sess)
+{
+ kmem_cache_free(se_sess_cache, se_sess);
+}
+EXPORT_SYMBOL(transport_free_session);
+
+void transport_deregister_session(struct se_session *se_sess)
+{
+ struct se_portal_group *se_tpg = se_sess->se_tpg;
+ struct se_node_acl *se_nacl;
+
+ if (!(se_tpg)) {
+ transport_free_session(se_sess);
+ return;
+ }
+ /*
+ * Wait for possible reference in drivers/target/target_core_mib.c:
+ * scsi_att_intr_port_seq_show()
+ */
+ while (atomic_read(&se_sess->mib_ref_count) != 0)
+ cpu_relax();
+
+ spin_lock_bh(&se_tpg->session_lock);
+ list_del(&se_sess->sess_list);
+ se_sess->se_tpg = NULL;
+ se_sess->fabric_sess_ptr = NULL;
+ spin_unlock_bh(&se_tpg->session_lock);
+
+ /*
+ * Determine if we need to do extra work for this initiator node's
+ * struct se_node_acl if it had been previously dynamically generated.
+ */
+ se_nacl = se_sess->se_node_acl;
+ if ((se_nacl)) {
+ spin_lock_bh(&se_tpg->acl_node_lock);
+ if (se_nacl->dynamic_node_acl) {
+ if (!(TPG_TFO(se_tpg)->tpg_check_demo_mode_cache(
+ se_tpg))) {
+ list_del(&se_nacl->acl_list);
+ se_tpg->num_node_acls--;
+ spin_unlock_bh(&se_tpg->acl_node_lock);
+
+ core_tpg_wait_for_nacl_pr_ref(se_nacl);
+ core_tpg_wait_for_mib_ref(se_nacl);
+ core_free_device_list_for_node(se_nacl, se_tpg);
+ TPG_TFO(se_tpg)->tpg_release_fabric_acl(se_tpg,
+ se_nacl);
+ spin_lock_bh(&se_tpg->acl_node_lock);
+ }
+ }
+ spin_unlock_bh(&se_tpg->acl_node_lock);
+ }
+
+ transport_free_session(se_sess);
+
+ printk(KERN_INFO "TARGET_CORE[%s]: Deregistered fabric_sess\n",
+ TPG_TFO(se_tpg)->get_fabric_name());
+}
+EXPORT_SYMBOL(transport_deregister_session);
+
+/*
+ * Called with T_TASK(cmd)->t_state_lock held.
+ */
+static void transport_all_task_dev_remove_state(struct se_cmd *cmd)
+{
+ struct se_device *dev;
+ struct se_task *task;
+ unsigned long flags;
+
+ if (!T_TASK(cmd))
+ return;
+
+ list_for_each_entry(task, &T_TASK(cmd)->t_task_list, t_list) {
+ dev = task->se_dev;
+ if (!(dev))
+ continue;
+
+ if (atomic_read(&task->task_active))
+ continue;
+
+ if (!(atomic_read(&task->task_state_active)))
+ continue;
+
+ spin_lock_irqsave(&dev->execute_task_lock, flags);
+ list_del(&task->t_state_list);
+ DEBUG_TSTATE("Removed ITT: 0x%08x dev: %p task[%p]\n",
+ CMD_TFO(cmd)->tfo_get_task_tag(cmd), dev, task);
+ spin_unlock_irqrestore(&dev->execute_task_lock, flags);
+
+ atomic_set(&task->task_state_active, 0);
+ atomic_dec(&T_TASK(cmd)->t_task_cdbs_ex_left);
+ }
+}
+
+/* transport_cmd_check_stop():
+ *
+ * 'transport_off = 1' determines if t_transport_active should be cleared.
+ * 'transport_off = 2' determines if task_dev_state should be removed.
+ *
+ * A non-zero u8 t_state sets cmd->t_state.
+ * Returns 1 when command is stopped, else 0.
+ */
+static int transport_cmd_check_stop(
+ struct se_cmd *cmd,
+ int transport_off,
+ u8 t_state)
+{
+ unsigned long flags;
+
+ spin_lock_irqsave(&T_TASK(cmd)->t_state_lock, flags);
+ /*
+ * Determine if IOCTL context caller in requesting the stopping of this
+ * command for LUN shutdown purposes.
+ */
+ if (atomic_read(&T_TASK(cmd)->transport_lun_stop)) {
+ DEBUG_CS("%s:%d atomic_read(&T_TASK(cmd)->transport_lun_stop)"
+ " == TRUE for ITT: 0x%08x\n", __func__, __LINE__,
+ CMD_TFO(cmd)->get_task_tag(cmd));
+
+ cmd->deferred_t_state = cmd->t_state;
+ cmd->t_state = TRANSPORT_DEFERRED_CMD;
+ atomic_set(&T_TASK(cmd)->t_transport_active, 0);
+ if (transport_off == 2)
+ transport_all_task_dev_remove_state(cmd);
+ spin_unlock_irqrestore(&T_TASK(cmd)->t_state_lock, flags);
+
+ complete(&T_TASK(cmd)->transport_lun_stop_comp);
+ return 1;
+ }
+ /*
+ * Determine if frontend context caller is requesting the stopping of
+ * this command for frontend excpections.
+ */
+ if (atomic_read(&T_TASK(cmd)->t_transport_stop)) {
+ DEBUG_CS("%s:%d atomic_read(&T_TASK(cmd)->t_transport_stop) =="
+ " TRUE for ITT: 0x%08x\n", __func__, __LINE__,
+ CMD_TFO(cmd)->get_task_tag(cmd));
+
+ cmd->deferred_t_state = cmd->t_state;
+ cmd->t_state = TRANSPORT_DEFERRED_CMD;
+ if (transport_off == 2)
+ transport_all_task_dev_remove_state(cmd);
+
+ /*
+ * Clear struct se_cmd->se_lun before the transport_off == 2 handoff
+ * to FE.
+ */
+ if (transport_off == 2)
+ cmd->se_lun = NULL;
+ spin_unlock_irqrestore(&T_TASK(cmd)->t_state_lock, flags);
+
+ complete(&T_TASK(cmd)->t_transport_stop_comp);
+ return 1;
+ }
+ if (transport_off) {
+ atomic_set(&T_TASK(cmd)->t_transport_active, 0);
+ if (transport_off == 2) {
+ transport_all_task_dev_remove_state(cmd);
+ /*
+ * Clear struct se_cmd->se_lun before the transport_off == 2
+ * handoff to fabric module.
+ */
+ cmd->se_lun = NULL;
+ /*
+ * Some fabric modules like tcm_loop can release
+ * their internally allocated I/O refrence now and
+ * struct se_cmd now.
+ */
+ if (CMD_TFO(cmd)->check_stop_free != NULL) {
+ spin_unlock_irqrestore(
+ &T_TASK(cmd)->t_state_lock, flags);
+
+ CMD_TFO(cmd)->check_stop_free(cmd);
+ return 1;
+ }
+ }
+ spin_unlock_irqrestore(&T_TASK(cmd)->t_state_lock, flags);
+
+ return 0;
+ } else if (t_state)
+ cmd->t_state = t_state;
+ spin_unlock_irqrestore(&T_TASK(cmd)->t_state_lock, flags);
+
+ return 0;
+}
+
+static int transport_cmd_check_stop_to_fabric(struct se_cmd *cmd)
+{
+ return transport_cmd_check_stop(cmd, 2, 0);
+}
+
+static void transport_lun_remove_cmd(struct se_cmd *cmd)
+{
+ struct se_lun *lun = SE_LUN(cmd);
+ unsigned long flags;
+
+ if (!lun)
+ return;
+
+ spin_lock_irqsave(&T_TASK(cmd)->t_state_lock, flags);
+ if (!(atomic_read(&T_TASK(cmd)->transport_dev_active))) {
+ spin_unlock_irqrestore(&T_TASK(cmd)->t_state_lock, flags);
+ goto check_lun;
+ }
+ atomic_set(&T_TASK(cmd)->transport_dev_active, 0);
+ transport_all_task_dev_remove_state(cmd);
+ spin_unlock_irqrestore(&T_TASK(cmd)->t_state_lock, flags);
+
+ transport_free_dev_tasks(cmd);
+
+check_lun:
+ spin_lock_irqsave(&lun->lun_cmd_lock, flags);
+ if (atomic_read(&T_TASK(cmd)->transport_lun_active)) {
+ list_del(&cmd->se_lun_list);
+ atomic_set(&T_TASK(cmd)->transport_lun_active, 0);
+#if 0
+ printk(KERN_INFO "Removed ITT: 0x%08x from LUN LIST[%d]\n"
+ CMD_TFO(cmd)->get_task_tag(cmd), lun->unpacked_lun);
+#endif
+ }
+ spin_unlock_irqrestore(&lun->lun_cmd_lock, flags);
+}
+
+void transport_cmd_finish_abort(struct se_cmd *cmd, int remove)
+{
+ transport_remove_cmd_from_queue(cmd, SE_DEV(cmd)->dev_queue_obj);
+ transport_lun_remove_cmd(cmd);
+
+ if (transport_cmd_check_stop_to_fabric(cmd))
+ return;
+ if (remove)
+ transport_generic_remove(cmd, 0, 0);
+}
+
+void transport_cmd_finish_abort_tmr(struct se_cmd *cmd)
+{
+ transport_remove_cmd_from_queue(cmd, SE_DEV(cmd)->dev_queue_obj);
+
+ if (transport_cmd_check_stop_to_fabric(cmd))
+ return;
+
+ transport_generic_remove(cmd, 0, 0);
+}
+
+static int transport_add_cmd_to_queue(
+ struct se_cmd *cmd,
+ int t_state)
+{
+ struct se_device *dev = cmd->se_dev;
+ struct se_queue_obj *qobj = dev->dev_queue_obj;
+ struct se_queue_req *qr;
+ unsigned long flags;
+
+ qr = kzalloc(sizeof(struct se_queue_req), GFP_ATOMIC);
+ if (!(qr)) {
+ printk(KERN_ERR "Unable to allocate memory for"
+ " struct se_queue_req\n");
+ return -1;
+ }
+ INIT_LIST_HEAD(&qr->qr_list);
+
+ qr->cmd = (void *)cmd;
+ qr->state = t_state;
+
+ if (t_state) {
+ spin_lock_irqsave(&T_TASK(cmd)->t_state_lock, flags);
+ cmd->t_state = t_state;
+ atomic_set(&T_TASK(cmd)->t_transport_active, 1);
+ spin_unlock_irqrestore(&T_TASK(cmd)->t_state_lock, flags);
+ }
+
+ spin_lock_irqsave(&qobj->cmd_queue_lock, flags);
+ list_add_tail(&qr->qr_list, &qobj->qobj_list);
+ atomic_inc(&T_TASK(cmd)->t_transport_queue_active);
+ spin_unlock_irqrestore(&qobj->cmd_queue_lock, flags);
+
+ atomic_inc(&qobj->queue_cnt);
+ wake_up_interruptible(&qobj->thread_wq);
+ return 0;
+}
+
+/*
+ * Called with struct se_queue_obj->cmd_queue_lock held.
+ */
+static struct se_queue_req *
+__transport_get_qr_from_queue(struct se_queue_obj *qobj)
+{
+ struct se_cmd *cmd;
+ struct se_queue_req *qr = NULL;
+
+ if (list_empty(&qobj->qobj_list))
+ return NULL;
+
+ list_for_each_entry(qr, &qobj->qobj_list, qr_list)
+ break;
+
+ if (qr->cmd) {
+ cmd = (struct se_cmd *)qr->cmd;
+ atomic_dec(&T_TASK(cmd)->t_transport_queue_active);
+ }
+ list_del(&qr->qr_list);
+ atomic_dec(&qobj->queue_cnt);
+
+ return qr;
+}
+
+static struct se_queue_req *
+transport_get_qr_from_queue(struct se_queue_obj *qobj)
+{
+ struct se_cmd *cmd;
+ struct se_queue_req *qr;
+ unsigned long flags;
+
+ spin_lock_irqsave(&qobj->cmd_queue_lock, flags);
+ if (list_empty(&qobj->qobj_list)) {
+ spin_unlock_irqrestore(&qobj->cmd_queue_lock, flags);
+ return NULL;
+ }
+
+ list_for_each_entry(qr, &qobj->qobj_list, qr_list)
+ break;
+
+ if (qr->cmd) {
+ cmd = (struct se_cmd *)qr->cmd;
+ atomic_dec(&T_TASK(cmd)->t_transport_queue_active);
+ }
+ list_del(&qr->qr_list);
+ atomic_dec(&qobj->queue_cnt);
+ spin_unlock_irqrestore(&qobj->cmd_queue_lock, flags);
+
+ return qr;
+}
+
+static void transport_remove_cmd_from_queue(struct se_cmd *cmd,
+ struct se_queue_obj *qobj)
+{
+ struct se_cmd *q_cmd;
+ struct se_queue_req *qr = NULL, *qr_p = NULL;
+ unsigned long flags;
+
+ spin_lock_irqsave(&qobj->cmd_queue_lock, flags);
+ if (!(atomic_read(&T_TASK(cmd)->t_transport_queue_active))) {
+ spin_unlock_irqrestore(&qobj->cmd_queue_lock, flags);
+ return;
+ }
+
+ list_for_each_entry_safe(qr, qr_p, &qobj->qobj_list, qr_list) {
+ q_cmd = (struct se_cmd *)qr->cmd;
+ if (q_cmd != cmd)
+ continue;
+
+ atomic_dec(&T_TASK(q_cmd)->t_transport_queue_active);
+ atomic_dec(&qobj->queue_cnt);
+ list_del(&qr->qr_list);
+ kfree(qr);
+ }
+ spin_unlock_irqrestore(&qobj->cmd_queue_lock, flags);
+
+ if (atomic_read(&T_TASK(cmd)->t_transport_queue_active)) {
+ printk(KERN_ERR "ITT: 0x%08x t_transport_queue_active: %d\n",
+ CMD_TFO(cmd)->get_task_tag(cmd),
+ atomic_read(&T_TASK(cmd)->t_transport_queue_active));
+ }
+}
+
+/*
+ * Completion function used by TCM subsystem plugins (such as FILEIO)
+ * for queueing up response from struct se_subsystem_api->do_task()
+ */
+void transport_complete_sync_cache(struct se_cmd *cmd, int good)
+{
+ struct se_task *task = list_entry(T_TASK(cmd)->t_task_list.next,
+ struct se_task, t_list);
+
+ if (good) {
+ cmd->scsi_status = SAM_STAT_GOOD;
+ task->task_scsi_status = GOOD;
+ } else {
+ task->task_scsi_status = SAM_STAT_CHECK_CONDITION;
+ task->task_error_status = PYX_TRANSPORT_ILLEGAL_REQUEST;
+ TASK_CMD(task)->transport_error_status =
+ PYX_TRANSPORT_ILLEGAL_REQUEST;
+ }
+
+ transport_complete_task(task, good);
+}
+EXPORT_SYMBOL(transport_complete_sync_cache);
+
+/* transport_complete_task():
+ *
+ * Called from interrupt and non interrupt context depending
+ * on the transport plugin.
+ */
+void transport_complete_task(struct se_task *task, int success)
+{
+ struct se_cmd *cmd = TASK_CMD(task);
+ struct se_device *dev = task->se_dev;
+ int t_state;
+ unsigned long flags;
+#if 0
+ printk(KERN_INFO "task: %p CDB: 0x%02x obj_ptr: %p\n", task,
+ T_TASK(cmd)->t_task_cdb[0], dev);
+#endif
+ if (dev) {
+ spin_lock_irqsave(&SE_HBA(dev)->hba_queue_lock, flags);
+ atomic_inc(&dev->depth_left);
+ atomic_inc(&SE_HBA(dev)->left_queue_depth);
+ spin_unlock_irqrestore(&SE_HBA(dev)->hba_queue_lock, flags);
+ }
+
+ spin_lock_irqsave(&T_TASK(cmd)->t_state_lock, flags);
+ atomic_set(&task->task_active, 0);
+
+ /*
+ * See if any sense data exists, if so set the TASK_SENSE flag.
+ * Also check for any other post completion work that needs to be
+ * done by the plugins.
+ */
+ if (dev && dev->transport->transport_complete) {
+ if (dev->transport->transport_complete(task) != 0) {
+ cmd->se_cmd_flags |= SCF_TRANSPORT_TASK_SENSE;
+ task->task_sense = 1;
+ success = 1;
+ }
+ }
+
+ /*
+ * See if we are waiting for outstanding struct se_task
+ * to complete for an exception condition
+ */
+ if (atomic_read(&task->task_stop)) {
+ /*
+ * Decrement T_TASK(cmd)->t_se_count if this task had
+ * previously thrown its timeout exception handler.
+ */
+ if (atomic_read(&task->task_timeout)) {
+ atomic_dec(&T_TASK(cmd)->t_se_count);
+ atomic_set(&task->task_timeout, 0);
+ }
+ spin_unlock_irqrestore(&T_TASK(cmd)->t_state_lock, flags);
+
+ complete(&task->task_stop_comp);
+ return;
+ }
+ /*
+ * If the task's timeout handler has fired, use the t_task_cdbs_timeout
+ * left counter to determine when the struct se_cmd is ready to be queued to
+ * the processing thread.
+ */
+ if (atomic_read(&task->task_timeout)) {
+ if (!(atomic_dec_and_test(
+ &T_TASK(cmd)->t_task_cdbs_timeout_left))) {
+ spin_unlock_irqrestore(&T_TASK(cmd)->t_state_lock,
+ flags);
+ return;
+ }
+ t_state = TRANSPORT_COMPLETE_TIMEOUT;
+ spin_unlock_irqrestore(&T_TASK(cmd)->t_state_lock, flags);
+
+ transport_add_cmd_to_queue(cmd, t_state);
+ return;
+ }
+ atomic_dec(&T_TASK(cmd)->t_task_cdbs_timeout_left);
+
+ /*
+ * Decrement the outstanding t_task_cdbs_left count. The last
+ * struct se_task from struct se_cmd will complete itself into the
+ * device queue depending upon int success.
+ */
+ if (!(atomic_dec_and_test(&T_TASK(cmd)->t_task_cdbs_left))) {
+ if (!success)
+ T_TASK(cmd)->t_tasks_failed = 1;
+
+ spin_unlock_irqrestore(&T_TASK(cmd)->t_state_lock, flags);
+ return;
+ }
+
+ if (!success || T_TASK(cmd)->t_tasks_failed) {
+ t_state = TRANSPORT_COMPLETE_FAILURE;
+ if (!task->task_error_status) {
+ task->task_error_status =
+ PYX_TRANSPORT_UNKNOWN_SAM_OPCODE;
+ cmd->transport_error_status =
+ PYX_TRANSPORT_UNKNOWN_SAM_OPCODE;
+ }
+ } else {
+ atomic_set(&T_TASK(cmd)->t_transport_complete, 1);
+ t_state = TRANSPORT_COMPLETE_OK;
+ }
+ spin_unlock_irqrestore(&T_TASK(cmd)->t_state_lock, flags);
+
+ transport_add_cmd_to_queue(cmd, t_state);
+}
+EXPORT_SYMBOL(transport_complete_task);
+
+/*
+ * Called by transport_add_tasks_from_cmd() once a struct se_cmd's
+ * struct se_task list are ready to be added to the active execution list
+ * struct se_device
+
+ * Called with se_dev_t->execute_task_lock called.
+ */
+static inline int transport_add_task_check_sam_attr(
+ struct se_task *task,
+ struct se_task *task_prev,
+ struct se_device *dev)
+{
+ /*
+ * No SAM Task attribute emulation enabled, add to tail of
+ * execution queue
+ */
+ if (dev->dev_task_attr_type != SAM_TASK_ATTR_EMULATED) {
+ list_add_tail(&task->t_execute_list, &dev->execute_task_list);
+ return 0;
+ }
+ /*
+ * HEAD_OF_QUEUE attribute for received CDB, which means
+ * the first task that is associated with a struct se_cmd goes to
+ * head of the struct se_device->execute_task_list, and task_prev
+ * after that for each subsequent task
+ */
+ if (task->task_se_cmd->sam_task_attr == TASK_ATTR_HOQ) {
+ list_add(&task->t_execute_list,
+ (task_prev != NULL) ?
+ &task_prev->t_execute_list :
+ &dev->execute_task_list);
+
+ DEBUG_STA("Set HEAD_OF_QUEUE for task CDB: 0x%02x"
+ " in execution queue\n",
+ T_TASK(task->task_se_cmd)->t_task_cdb[0]);
+ return 1;
+ }
+ /*
+ * For ORDERED, SIMPLE or UNTAGGED attribute tasks once they have been
+ * transitioned from Dermant -> Active state, and are added to the end
+ * of the struct se_device->execute_task_list
+ */
+ list_add_tail(&task->t_execute_list, &dev->execute_task_list);
+ return 0;
+}
+
+/* __transport_add_task_to_execute_queue():
+ *
+ * Called with se_dev_t->execute_task_lock called.
+ */
+static void __transport_add_task_to_execute_queue(
+ struct se_task *task,
+ struct se_task *task_prev,
+ struct se_device *dev)
+{
+ int head_of_queue;
+
+ head_of_queue = transport_add_task_check_sam_attr(task, task_prev, dev);
+ atomic_inc(&dev->execute_tasks);
+
+ if (atomic_read(&task->task_state_active))
+ return;
+ /*
+ * Determine if this task needs to go to HEAD_OF_QUEUE for the
+ * state list as well. Running with SAM Task Attribute emulation
+ * will always return head_of_queue == 0 here
+ */
+ if (head_of_queue)
+ list_add(&task->t_state_list, (task_prev) ?
+ &task_prev->t_state_list :
+ &dev->state_task_list);
+ else
+ list_add_tail(&task->t_state_list, &dev->state_task_list);
+
+ atomic_set(&task->task_state_active, 1);
+
+ DEBUG_TSTATE("Added ITT: 0x%08x task[%p] to dev: %p\n",
+ CMD_TFO(task->task_se_cmd)->get_task_tag(task->task_se_cmd),
+ task, dev);
+}
+
+static void transport_add_tasks_to_state_queue(struct se_cmd *cmd)
+{
+ struct se_device *dev;
+ struct se_task *task;
+ unsigned long flags;
+
+ spin_lock_irqsave(&T_TASK(cmd)->t_state_lock, flags);
+ list_for_each_entry(task, &T_TASK(cmd)->t_task_list, t_list) {
+ dev = task->se_dev;
+
+ if (atomic_read(&task->task_state_active))
+ continue;
+
+ spin_lock(&dev->execute_task_lock);
+ list_add_tail(&task->t_state_list, &dev->state_task_list);
+ atomic_set(&task->task_state_active, 1);
+
+ DEBUG_TSTATE("Added ITT: 0x%08x task[%p] to dev: %p\n",
+ CMD_TFO(task->task_se_cmd)->get_task_tag(
+ task->task_se_cmd), task, dev);
+
+ spin_unlock(&dev->execute_task_lock);
+ }
+ spin_unlock_irqrestore(&T_TASK(cmd)->t_state_lock, flags);
+}
+
+static void transport_add_tasks_from_cmd(struct se_cmd *cmd)
+{
+ struct se_device *dev = SE_DEV(cmd);
+ struct se_task *task, *task_prev = NULL;
+ unsigned long flags;
+
+ spin_lock_irqsave(&dev->execute_task_lock, flags);
+ list_for_each_entry(task, &T_TASK(cmd)->t_task_list, t_list) {
+ if (atomic_read(&task->task_execute_queue))
+ continue;
+ /*
+ * __transport_add_task_to_execute_queue() handles the
+ * SAM Task Attribute emulation if enabled
+ */
+ __transport_add_task_to_execute_queue(task, task_prev, dev);
+ atomic_set(&task->task_execute_queue, 1);
+ task_prev = task;
+ }
+ spin_unlock_irqrestore(&dev->execute_task_lock, flags);
+
+ return;
+}
+
+/* transport_get_task_from_execute_queue():
+ *
+ * Called with dev->execute_task_lock held.
+ */
+static struct se_task *
+transport_get_task_from_execute_queue(struct se_device *dev)
+{
+ struct se_task *task;
+
+ if (list_empty(&dev->execute_task_list))
+ return NULL;
+
+ list_for_each_entry(task, &dev->execute_task_list, t_execute_list)
+ break;
+
+ list_del(&task->t_execute_list);
+ atomic_dec(&dev->execute_tasks);
+
+ return task;
+}
+
+/* transport_remove_task_from_execute_queue():
+ *
+ *
+ */
+static void transport_remove_task_from_execute_queue(
+ struct se_task *task,
+ struct se_device *dev)
+{
+ unsigned long flags;
+
+ spin_lock_irqsave(&dev->execute_task_lock, flags);
+ list_del(&task->t_execute_list);
+ atomic_dec(&dev->execute_tasks);
+ spin_unlock_irqrestore(&dev->execute_task_lock, flags);
+}
+
+unsigned char *transport_dump_cmd_direction(struct se_cmd *cmd)
+{
+ switch (cmd->data_direction) {
+ case DMA_NONE:
+ return "NONE";
+ case DMA_FROM_DEVICE:
+ return "READ";
+ case DMA_TO_DEVICE:
+ return "WRITE";
+ case DMA_BIDIRECTIONAL:
+ return "BIDI";
+ default:
+ break;
+ }
+
+ return "UNKNOWN";
+}
+
+void transport_dump_dev_state(
+ struct se_device *dev,
+ char *b,
+ int *bl)
+{
+ *bl += sprintf(b + *bl, "Status: ");
+ switch (dev->dev_status) {
+ case TRANSPORT_DEVICE_ACTIVATED:
+ *bl += sprintf(b + *bl, "ACTIVATED");
+ break;
+ case TRANSPORT_DEVICE_DEACTIVATED:
+ *bl += sprintf(b + *bl, "DEACTIVATED");
+ break;
+ case TRANSPORT_DEVICE_SHUTDOWN:
+ *bl += sprintf(b + *bl, "SHUTDOWN");
+ break;
+ case TRANSPORT_DEVICE_OFFLINE_ACTIVATED:
+ case TRANSPORT_DEVICE_OFFLINE_DEACTIVATED:
+ *bl += sprintf(b + *bl, "OFFLINE");
+ break;
+ default:
+ *bl += sprintf(b + *bl, "UNKNOWN=%d", dev->dev_status);
+ break;
+ }
+
+ *bl += sprintf(b + *bl, " Execute/Left/Max Queue Depth: %d/%d/%d",
+ atomic_read(&dev->execute_tasks), atomic_read(&dev->depth_left),
+ dev->queue_depth);
+ *bl += sprintf(b + *bl, " SectorSize: %u MaxSectors: %u\n",
+ DEV_ATTRIB(dev)->block_size, DEV_ATTRIB(dev)->max_sectors);
+ *bl += sprintf(b + *bl, " ");
+}
+
+/* transport_release_all_cmds():
+ *
+ *
+ */
+static void transport_release_all_cmds(struct se_device *dev)
+{
+ struct se_cmd *cmd = NULL;
+ struct se_queue_req *qr = NULL, *qr_p = NULL;
+ int bug_out = 0, t_state;
+ unsigned long flags;
+
+ spin_lock_irqsave(&dev->dev_queue_obj->cmd_queue_lock, flags);
+ list_for_each_entry_safe(qr, qr_p, &dev->dev_queue_obj->qobj_list,
+ qr_list) {
+
+ cmd = (struct se_cmd *)qr->cmd;
+ t_state = qr->state;
+ list_del(&qr->qr_list);
+ kfree(qr);
+ spin_unlock_irqrestore(&dev->dev_queue_obj->cmd_queue_lock,
+ flags);
+
+ printk(KERN_ERR "Releasing ITT: 0x%08x, i_state: %u,"
+ " t_state: %u directly\n",
+ CMD_TFO(cmd)->get_task_tag(cmd),
+ CMD_TFO(cmd)->get_cmd_state(cmd), t_state);
+
+ transport_release_fe_cmd(cmd);
+ bug_out = 1;
+
+ spin_lock_irqsave(&dev->dev_queue_obj->cmd_queue_lock, flags);
+ }
+ spin_unlock_irqrestore(&dev->dev_queue_obj->cmd_queue_lock, flags);
+#if 0
+ if (bug_out)
+ BUG();
+#endif
+}
+
+void transport_dump_vpd_proto_id(
+ struct t10_vpd *vpd,
+ unsigned char *p_buf,
+ int p_buf_len)
+{
+ unsigned char buf[VPD_TMP_BUF_SIZE];
+ int len;
+
+ memset(buf, 0, VPD_TMP_BUF_SIZE);
+ len = sprintf(buf, "T10 VPD Protocol Identifier: ");
+
+ switch (vpd->protocol_identifier) {
+ case 0x00:
+ sprintf(buf+len, "Fibre Channel\n");
+ break;
+ case 0x10:
+ sprintf(buf+len, "Parallel SCSI\n");
+ break;
+ case 0x20:
+ sprintf(buf+len, "SSA\n");
+ break;
+ case 0x30:
+ sprintf(buf+len, "IEEE 1394\n");
+ break;
+ case 0x40:
+ sprintf(buf+len, "SCSI Remote Direct Memory Access"
+ " Protocol\n");
+ break;
+ case 0x50:
+ sprintf(buf+len, "Internet SCSI (iSCSI)\n");
+ break;
+ case 0x60:
+ sprintf(buf+len, "SAS Serial SCSI Protocol\n");
+ break;
+ case 0x70:
+ sprintf(buf+len, "Automation/Drive Interface Transport"
+ " Protocol\n");
+ break;
+ case 0x80:
+ sprintf(buf+len, "AT Attachment Interface ATA/ATAPI\n");
+ break;
+ default:
+ sprintf(buf+len, "Unknown 0x%02x\n",
+ vpd->protocol_identifier);
+ break;
+ }
+
+ if (p_buf)
+ strncpy(p_buf, buf, p_buf_len);
+ else
+ printk(KERN_INFO "%s", buf);
+}
+
+void
+transport_set_vpd_proto_id(struct t10_vpd *vpd, unsigned char *page_83)
+{
+ /*
+ * Check if the Protocol Identifier Valid (PIV) bit is set..
+ *
+ * from spc3r23.pdf section 7.5.1
+ */
+ if (page_83[1] & 0x80) {
+ vpd->protocol_identifier = (page_83[0] & 0xf0);
+ vpd->protocol_identifier_set = 1;
+ transport_dump_vpd_proto_id(vpd, NULL, 0);
+ }
+}
+EXPORT_SYMBOL(transport_set_vpd_proto_id);
+
+int transport_dump_vpd_assoc(
+ struct t10_vpd *vpd,
+ unsigned char *p_buf,
+ int p_buf_len)
+{
+ unsigned char buf[VPD_TMP_BUF_SIZE];
+ int ret = 0, len;
+
+ memset(buf, 0, VPD_TMP_BUF_SIZE);
+ len = sprintf(buf, "T10 VPD Identifier Association: ");
+
+ switch (vpd->association) {
+ case 0x00:
+ sprintf(buf+len, "addressed logical unit\n");
+ break;
+ case 0x10:
+ sprintf(buf+len, "target port\n");
+ break;
+ case 0x20:
+ sprintf(buf+len, "SCSI target device\n");
+ break;
+ default:
+ sprintf(buf+len, "Unknown 0x%02x\n", vpd->association);
+ ret = -1;
+ break;
+ }
+
+ if (p_buf)
+ strncpy(p_buf, buf, p_buf_len);
+ else
+ printk("%s", buf);
+
+ return ret;
+}
+
+int transport_set_vpd_assoc(struct t10_vpd *vpd, unsigned char *page_83)
+{
+ /*
+ * The VPD identification association..
+ *
+ * from spc3r23.pdf Section 7.6.3.1 Table 297
+ */
+ vpd->association = (page_83[1] & 0x30);
+ return transport_dump_vpd_assoc(vpd, NULL, 0);
+}
+EXPORT_SYMBOL(transport_set_vpd_assoc);
+
+int transport_dump_vpd_ident_type(
+ struct t10_vpd *vpd,
+ unsigned char *p_buf,
+ int p_buf_len)
+{
+ unsigned char buf[VPD_TMP_BUF_SIZE];
+ int ret = 0, len;
+
+ memset(buf, 0, VPD_TMP_BUF_SIZE);
+ len = sprintf(buf, "T10 VPD Identifier Type: ");
+
+ switch (vpd->device_identifier_type) {
+ case 0x00:
+ sprintf(buf+len, "Vendor specific\n");
+ break;
+ case 0x01:
+ sprintf(buf+len, "T10 Vendor ID based\n");
+ break;
+ case 0x02:
+ sprintf(buf+len, "EUI-64 based\n");
+ break;
+ case 0x03:
+ sprintf(buf+len, "NAA\n");
+ break;
+ case 0x04:
+ sprintf(buf+len, "Relative target port identifier\n");
+ break;
+ case 0x08:
+ sprintf(buf+len, "SCSI name string\n");
+ break;
+ default:
+ sprintf(buf+len, "Unsupported: 0x%02x\n",
+ vpd->device_identifier_type);
+ ret = -1;
+ break;
+ }
+
+ if (p_buf)
+ strncpy(p_buf, buf, p_buf_len);
+ else
+ printk("%s", buf);
+
+ return ret;
+}
+
+int transport_set_vpd_ident_type(struct t10_vpd *vpd, unsigned char *page_83)
+{
+ /*
+ * The VPD identifier type..
+ *
+ * from spc3r23.pdf Section 7.6.3.1 Table 298
+ */
+ vpd->device_identifier_type = (page_83[1] & 0x0f);
+ return transport_dump_vpd_ident_type(vpd, NULL, 0);
+}
+EXPORT_SYMBOL(transport_set_vpd_ident_type);
+
+int transport_dump_vpd_ident(
+ struct t10_vpd *vpd,
+ unsigned char *p_buf,
+ int p_buf_len)
+{
+ unsigned char buf[VPD_TMP_BUF_SIZE];
+ int ret = 0;
+
+ memset(buf, 0, VPD_TMP_BUF_SIZE);
+
+ switch (vpd->device_identifier_code_set) {
+ case 0x01: /* Binary */
+ sprintf(buf, "T10 VPD Binary Device Identifier: %s\n",
+ &vpd->device_identifier[0]);
+ break;
+ case 0x02: /* ASCII */
+ sprintf(buf, "T10 VPD ASCII Device Identifier: %s\n",
+ &vpd->device_identifier[0]);
+ break;
+ case 0x03: /* UTF-8 */
+ sprintf(buf, "T10 VPD UTF-8 Device Identifier: %s\n",
+ &vpd->device_identifier[0]);
+ break;
+ default:
+ sprintf(buf, "T10 VPD Device Identifier encoding unsupported:"
+ " 0x%02x", vpd->device_identifier_code_set);
+ ret = -1;
+ break;
+ }
+
+ if (p_buf)
+ strncpy(p_buf, buf, p_buf_len);
+ else
+ printk("%s", buf);
+
+ return ret;
+}
+
+int
+transport_set_vpd_ident(struct t10_vpd *vpd, unsigned char *page_83)
+{
+ static const char hex_str[] = "0123456789abcdef";
+ int j = 0, i = 4; /* offset to start of the identifer */
+
+ /*
+ * The VPD Code Set (encoding)
+ *
+ * from spc3r23.pdf Section 7.6.3.1 Table 296
+ */
+ vpd->device_identifier_code_set = (page_83[0] & 0x0f);
+ switch (vpd->device_identifier_code_set) {
+ case 0x01: /* Binary */
+ vpd->device_identifier[j++] =
+ hex_str[vpd->device_identifier_type];
+ while (i < (4 + page_83[3])) {
+ vpd->device_identifier[j++] =
+ hex_str[(page_83[i] & 0xf0) >> 4];
+ vpd->device_identifier[j++] =
+ hex_str[page_83[i] & 0x0f];
+ i++;
+ }
+ break;
+ case 0x02: /* ASCII */
+ case 0x03: /* UTF-8 */
+ while (i < (4 + page_83[3]))
+ vpd->device_identifier[j++] = page_83[i++];
+ break;
+ default:
+ break;
+ }
+
+ return transport_dump_vpd_ident(vpd, NULL, 0);
+}
+EXPORT_SYMBOL(transport_set_vpd_ident);
+
+static void core_setup_task_attr_emulation(struct se_device *dev)
+{
+ /*
+ * If this device is from Target_Core_Mod/pSCSI, disable the
+ * SAM Task Attribute emulation.
+ *
+ * This is currently not available in upsream Linux/SCSI Target
+ * mode code, and is assumed to be disabled while using TCM/pSCSI.
+ */
+ if (TRANSPORT(dev)->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV) {
+ dev->dev_task_attr_type = SAM_TASK_ATTR_PASSTHROUGH;
+ return;
+ }
+
+ dev->dev_task_attr_type = SAM_TASK_ATTR_EMULATED;
+ DEBUG_STA("%s: Using SAM_TASK_ATTR_EMULATED for SPC: 0x%02x"
+ " device\n", TRANSPORT(dev)->name,
+ TRANSPORT(dev)->get_device_rev(dev));
+}
+
+static void scsi_dump_inquiry(struct se_device *dev)
+{
+ struct t10_wwn *wwn = DEV_T10_WWN(dev);
+ int i, device_type;
+ /*
+ * Print Linux/SCSI style INQUIRY formatting to the kernel ring buffer
+ */
+ printk(" Vendor: ");
+ for (i = 0; i < 8; i++)
+ if (wwn->vendor[i] >= 0x20)
+ printk("%c", wwn->vendor[i]);
+ else
+ printk(" ");
+
+ printk(" Model: ");
+ for (i = 0; i < 16; i++)
+ if (wwn->model[i] >= 0x20)
+ printk("%c", wwn->model[i]);
+ else
+ printk(" ");
+
+ printk(" Revision: ");
+ for (i = 0; i < 4; i++)
+ if (wwn->revision[i] >= 0x20)
+ printk("%c", wwn->revision[i]);
+ else
+ printk(" ");
+
+ printk("\n");
+
+ device_type = TRANSPORT(dev)->get_device_type(dev);
+ printk(" Type: %s ", scsi_device_type(device_type));
+ printk(" ANSI SCSI revision: %02x\n",
+ TRANSPORT(dev)->get_device_rev(dev));
+}
+
+struct se_device *transport_add_device_to_core_hba(
+ struct se_hba *hba,
+ struct se_subsystem_api *transport,
+ struct se_subsystem_dev *se_dev,
+ u32 device_flags,
+ void *transport_dev,
+ struct se_dev_limits *dev_limits,
+ const char *inquiry_prod,
+ const char *inquiry_rev)
+{
+ int ret = 0, force_pt;
+ struct se_device *dev;
+
+ dev = kzalloc(sizeof(struct se_device), GFP_KERNEL);
+ if (!(dev)) {
+ printk(KERN_ERR "Unable to allocate memory for se_dev_t\n");
+ return NULL;
+ }
+ dev->dev_queue_obj = kzalloc(sizeof(struct se_queue_obj), GFP_KERNEL);
+ if (!(dev->dev_queue_obj)) {
+ printk(KERN_ERR "Unable to allocate memory for"
+ " dev->dev_queue_obj\n");
+ kfree(dev);
+ return NULL;
+ }
+ transport_init_queue_obj(dev->dev_queue_obj);
+
+ dev->dev_status_queue_obj = kzalloc(sizeof(struct se_queue_obj),
+ GFP_KERNEL);
+ if (!(dev->dev_status_queue_obj)) {
+ printk(KERN_ERR "Unable to allocate memory for"
+ " dev->dev_status_queue_obj\n");
+ kfree(dev->dev_queue_obj);
+ kfree(dev);
+ return NULL;
+ }
+ transport_init_queue_obj(dev->dev_status_queue_obj);
+
+ dev->dev_flags = device_flags;
+ dev->dev_status |= TRANSPORT_DEVICE_DEACTIVATED;
+ dev->dev_ptr = (void *) transport_dev;
+ dev->se_hba = hba;
+ dev->se_sub_dev = se_dev;
+ dev->transport = transport;
+ atomic_set(&dev->active_cmds, 0);
+ INIT_LIST_HEAD(&dev->dev_list);
+ INIT_LIST_HEAD(&dev->dev_sep_list);
+ INIT_LIST_HEAD(&dev->dev_tmr_list);
+ INIT_LIST_HEAD(&dev->execute_task_list);
+ INIT_LIST_HEAD(&dev->delayed_cmd_list);
+ INIT_LIST_HEAD(&dev->ordered_cmd_list);
+ INIT_LIST_HEAD(&dev->state_task_list);
+ spin_lock_init(&dev->execute_task_lock);
+ spin_lock_init(&dev->delayed_cmd_lock);
+ spin_lock_init(&dev->ordered_cmd_lock);
+ spin_lock_init(&dev->state_task_lock);
+ spin_lock_init(&dev->dev_alua_lock);
+ spin_lock_init(&dev->dev_reservation_lock);
+ spin_lock_init(&dev->dev_status_lock);
+ spin_lock_init(&dev->dev_status_thr_lock);
+ spin_lock_init(&dev->se_port_lock);
+ spin_lock_init(&dev->se_tmr_lock);
+
+ dev->queue_depth = dev_limits->queue_depth;
+ atomic_set(&dev->depth_left, dev->queue_depth);
+ atomic_set(&dev->dev_ordered_id, 0);
+
+ se_dev_set_default_attribs(dev, dev_limits);
+
+ dev->dev_index = scsi_get_new_index(SCSI_DEVICE_INDEX);
+ dev->creation_time = get_jiffies_64();
+ spin_lock_init(&dev->stats_lock);
+
+ spin_lock(&hba->device_lock);
+ list_add_tail(&dev->dev_list, &hba->hba_dev_list);
+ hba->dev_count++;
+ spin_unlock(&hba->device_lock);
+ /*
+ * Setup the SAM Task Attribute emulation for struct se_device
+ */
+ core_setup_task_attr_emulation(dev);
+ /*
+ * Force PR and ALUA passthrough emulation with internal object use.
+ */
+ force_pt = (hba->hba_flags & HBA_FLAGS_INTERNAL_USE);
+ /*
+ * Setup the Reservations infrastructure for struct se_device
+ */
+ core_setup_reservations(dev, force_pt);
+ /*
+ * Setup the Asymmetric Logical Unit Assignment for struct se_device
+ */
+ if (core_setup_alua(dev, force_pt) < 0)
+ goto out;
+
+ /*
+ * Startup the struct se_device processing thread
+ */
+ dev->process_thread = kthread_run(transport_processing_thread, dev,
+ "LIO_%s", TRANSPORT(dev)->name);
+ if (IS_ERR(dev->process_thread)) {
+ printk(KERN_ERR "Unable to create kthread: LIO_%s\n",
+ TRANSPORT(dev)->name);
+ goto out;
+ }
+
+ /*
+ * Preload the initial INQUIRY const values if we are doing
+ * anything virtual (IBLOCK, FILEIO, RAMDISK), but not for TCM/pSCSI
+ * passthrough because this is being provided by the backend LLD.
+ * This is required so that transport_get_inquiry() copies these
+ * originals once back into DEV_T10_WWN(dev) for the virtual device
+ * setup.
+ */
+ if (TRANSPORT(dev)->transport_type != TRANSPORT_PLUGIN_PHBA_PDEV) {
+ if (!(inquiry_prod) || !(inquiry_prod)) {
+ printk(KERN_ERR "All non TCM/pSCSI plugins require"
+ " INQUIRY consts\n");
+ goto out;
+ }
+
+ strncpy(&DEV_T10_WWN(dev)->vendor[0], "LIO-ORG", 8);
+ strncpy(&DEV_T10_WWN(dev)->model[0], inquiry_prod, 16);
+ strncpy(&DEV_T10_WWN(dev)->revision[0], inquiry_rev, 4);
+ }
+ scsi_dump_inquiry(dev);
+
+out:
+ if (!ret)
+ return dev;
+ kthread_stop(dev->process_thread);
+
+ spin_lock(&hba->device_lock);
+ list_del(&dev->dev_list);
+ hba->dev_count--;
+ spin_unlock(&hba->device_lock);
+
+ se_release_vpd_for_dev(dev);
+
+ kfree(dev->dev_status_queue_obj);
+ kfree(dev->dev_queue_obj);
+ kfree(dev);
+
+ return NULL;
+}
+EXPORT_SYMBOL(transport_add_device_to_core_hba);
+
+/* transport_generic_prepare_cdb():
+ *
+ * Since the Initiator sees iSCSI devices as LUNs, the SCSI CDB will
+ * contain the iSCSI LUN in bits 7-5 of byte 1 as per SAM-2.
+ * The point of this is since we are mapping iSCSI LUNs to
+ * SCSI Target IDs having a non-zero LUN in the CDB will throw the
+ * devices and HBAs for a loop.
+ */
+static inline void transport_generic_prepare_cdb(
+ unsigned char *cdb)
+{
+ switch (cdb[0]) {
+ case READ_10: /* SBC - RDProtect */
+ case READ_12: /* SBC - RDProtect */
+ case READ_16: /* SBC - RDProtect */
+ case SEND_DIAGNOSTIC: /* SPC - SELF-TEST Code */
+ case VERIFY: /* SBC - VRProtect */
+ case VERIFY_16: /* SBC - VRProtect */
+ case WRITE_VERIFY: /* SBC - VRProtect */
+ case WRITE_VERIFY_12: /* SBC - VRProtect */
+ break;
+ default:
+ cdb[1] &= 0x1f; /* clear logical unit number */
+ break;
+ }
+}
+
+static struct se_task *
+transport_generic_get_task(struct se_cmd *cmd,
+ enum dma_data_direction data_direction)
+{
+ struct se_task *task;
+ struct se_device *dev = SE_DEV(cmd);
+ unsigned long flags;
+
+ task = dev->transport->alloc_task(cmd);
+ if (!task) {
+ printk(KERN_ERR "Unable to allocate struct se_task\n");
+ return NULL;
+ }
+
+ INIT_LIST_HEAD(&task->t_list);
+ INIT_LIST_HEAD(&task->t_execute_list);
+ INIT_LIST_HEAD(&task->t_state_list);
+ init_completion(&task->task_stop_comp);
+ task->task_no = T_TASK(cmd)->t_tasks_no++;
+ task->task_se_cmd = cmd;
+ task->se_dev = dev;
+ task->task_data_direction = data_direction;
+
+ spin_lock_irqsave(&T_TASK(cmd)->t_state_lock, flags);
+ list_add_tail(&task->t_list, &T_TASK(cmd)->t_task_list);
+ spin_unlock_irqrestore(&T_TASK(cmd)->t_state_lock, flags);
+
+ return task;
+}
+
+static int transport_generic_cmd_sequencer(struct se_cmd *, unsigned char *);
+
+void transport_device_setup_cmd(struct se_cmd *cmd)
+{
+ cmd->se_dev = SE_LUN(cmd)->lun_se_dev;
+}
+EXPORT_SYMBOL(transport_device_setup_cmd);
+
+/*
+ * Used by fabric modules containing a local struct se_cmd within their
+ * fabric dependent per I/O descriptor.
+ */
+void transport_init_se_cmd(
+ struct se_cmd *cmd,
+ struct target_core_fabric_ops *tfo,
+ struct se_session *se_sess,
+ u32 data_length,
+ int data_direction,
+ int task_attr,
+ unsigned char *sense_buffer)
+{
+ INIT_LIST_HEAD(&cmd->se_lun_list);
+ INIT_LIST_HEAD(&cmd->se_delayed_list);
+ INIT_LIST_HEAD(&cmd->se_ordered_list);
+ /*
+ * Setup t_task pointer to t_task_backstore
+ */
+ cmd->t_task = &cmd->t_task_backstore;
+
+ INIT_LIST_HEAD(&T_TASK(cmd)->t_task_list);
+ init_completion(&T_TASK(cmd)->transport_lun_fe_stop_comp);
+ init_completion(&T_TASK(cmd)->transport_lun_stop_comp);
+ init_completion(&T_TASK(cmd)->t_transport_stop_comp);
+ spin_lock_init(&T_TASK(cmd)->t_state_lock);
+ atomic_set(&T_TASK(cmd)->transport_dev_active, 1);
+
+ cmd->se_tfo = tfo;
+ cmd->se_sess = se_sess;
+ cmd->data_length = data_length;
+ cmd->data_direction = data_direction;
+ cmd->sam_task_attr = task_attr;
+ cmd->sense_buffer = sense_buffer;
+}
+EXPORT_SYMBOL(transport_init_se_cmd);
+
+static int transport_check_alloc_task_attr(struct se_cmd *cmd)
+{
+ /*
+ * Check if SAM Task Attribute emulation is enabled for this
+ * struct se_device storage object
+ */
+ if (SE_DEV(cmd)->dev_task_attr_type != SAM_TASK_ATTR_EMULATED)
+ return 0;
+
+ if (cmd->sam_task_attr == TASK_ATTR_ACA) {
+ DEBUG_STA("SAM Task Attribute ACA"
+ " emulation is not supported\n");
+ return -1;
+ }
+ /*
+ * Used to determine when ORDERED commands should go from
+ * Dormant to Active status.
+ */
+ cmd->se_ordered_id = atomic_inc_return(&SE_DEV(cmd)->dev_ordered_id);
+ smp_mb__after_atomic_inc();
+ DEBUG_STA("Allocated se_ordered_id: %u for Task Attr: 0x%02x on %s\n",
+ cmd->se_ordered_id, cmd->sam_task_attr,
+ TRANSPORT(cmd->se_dev)->name);
+ return 0;
+}
+
+void transport_free_se_cmd(
+ struct se_cmd *se_cmd)
+{
+ if (se_cmd->se_tmr_req)
+ core_tmr_release_req(se_cmd->se_tmr_req);
+ /*
+ * Check and free any extended CDB buffer that was allocated
+ */
+ if (T_TASK(se_cmd)->t_task_cdb != T_TASK(se_cmd)->__t_task_cdb)
+ kfree(T_TASK(se_cmd)->t_task_cdb);
+}
+EXPORT_SYMBOL(transport_free_se_cmd);
+
+static void transport_generic_wait_for_tasks(struct se_cmd *, int, int);
+
+/* transport_generic_allocate_tasks():
+ *
+ * Called from fabric RX Thread.
+ */
+int transport_generic_allocate_tasks(
+ struct se_cmd *cmd,
+ unsigned char *cdb)
+{
+ int ret;
+
+ transport_generic_prepare_cdb(cdb);
+
+ /*
+ * This is needed for early exceptions.
+ */
+ cmd->transport_wait_for_tasks = &transport_generic_wait_for_tasks;
+
+ transport_device_setup_cmd(cmd);
+ /*
+ * See if this is a CDB which follows SAM, also grab a function
+ * pointer to see if we need to do extra work.
+ */
+ ret = transport_generic_cmd_sequencer(cmd, cdb);
+ if (ret < 0)
+ return ret;
+ /*
+ * Ensure that the received CDB is less than the max (252 + 8) bytes
+ * for VARIABLE_LENGTH_CMD
+ */
+ if (scsi_command_size(cdb) > SCSI_MAX_VARLEN_CDB_SIZE) {
+ printk(KERN_ERR "Received SCSI CDB with command_size: %d that"
+ " exceeds SCSI_MAX_VARLEN_CDB_SIZE: %d\n",
+ scsi_command_size(cdb), SCSI_MAX_VARLEN_CDB_SIZE);
+ return -1;
+ }
+ /*
+ * If the received CDB is larger than TCM_MAX_COMMAND_SIZE,
+ * allocate the additional extended CDB buffer now.. Otherwise
+ * setup the pointer from __t_task_cdb to t_task_cdb.
+ */
+ if (scsi_command_size(cdb) > sizeof(T_TASK(cmd)->__t_task_cdb)) {
+ T_TASK(cmd)->t_task_cdb = kzalloc(scsi_command_size(cdb),
+ GFP_KERNEL);
+ if (!(T_TASK(cmd)->t_task_cdb)) {
+ printk(KERN_ERR "Unable to allocate T_TASK(cmd)->t_task_cdb"
+ " %u > sizeof(T_TASK(cmd)->__t_task_cdb): %lu ops\n",
+ scsi_command_size(cdb),
+ (unsigned long)sizeof(T_TASK(cmd)->__t_task_cdb));
+ return -1;
+ }
+ } else
+ T_TASK(cmd)->t_task_cdb = &T_TASK(cmd)->__t_task_cdb[0];
+ /*
+ * Copy the original CDB into T_TASK(cmd).
+ */
+ memcpy(T_TASK(cmd)->t_task_cdb, cdb, scsi_command_size(cdb));
+ /*
+ * Check for SAM Task Attribute Emulation
+ */
+ if (transport_check_alloc_task_attr(cmd) < 0) {
+ cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION;
+ cmd->scsi_sense_reason = TCM_INVALID_CDB_FIELD;
+ return -2;
+ }
+ spin_lock(&cmd->se_lun->lun_sep_lock);
+ if (cmd->se_lun->lun_sep)
+ cmd->se_lun->lun_sep->sep_stats.cmd_pdus++;
+ spin_unlock(&cmd->se_lun->lun_sep_lock);
+ return 0;
+}
+EXPORT_SYMBOL(transport_generic_allocate_tasks);
+
+/*
+ * Used by fabric module frontends not defining a TFO->new_cmd_map()
+ * to queue up a newly setup se_cmd w/ TRANSPORT_NEW_CMD statis
+ */
+int transport_generic_handle_cdb(
+ struct se_cmd *cmd)
+{
+ if (!SE_LUN(cmd)) {
+ dump_stack();
+ printk(KERN_ERR "SE_LUN(cmd) is NULL\n");
+ return -1;
+ }
+
+ transport_add_cmd_to_queue(cmd, TRANSPORT_NEW_CMD);
+ return 0;
+}
+EXPORT_SYMBOL(transport_generic_handle_cdb);
+
+/*
+ * Used by fabric module frontends defining a TFO->new_cmd_map() caller
+ * to queue up a newly setup se_cmd w/ TRANSPORT_NEW_CMD_MAP in order to
+ * complete setup in TCM process context w/ TFO->new_cmd_map().
+ */
+int transport_generic_handle_cdb_map(
+ struct se_cmd *cmd)
+{
+ if (!SE_LUN(cmd)) {
+ dump_stack();
+ printk(KERN_ERR "SE_LUN(cmd) is NULL\n");
+ return -1;
+ }
+
+ transport_add_cmd_to_queue(cmd, TRANSPORT_NEW_CMD_MAP);
+ return 0;
+}
+EXPORT_SYMBOL(transport_generic_handle_cdb_map);
+
+/* transport_generic_handle_data():
+ *
+ *
+ */
+int transport_generic_handle_data(
+ struct se_cmd *cmd)
+{
+ /*
+ * For the software fabric case, then we assume the nexus is being
+ * failed/shutdown when signals are pending from the kthread context
+ * caller, so we return a failure. For the HW target mode case running
+ * in interrupt code, the signal_pending() check is skipped.
+ */
+ if (!in_interrupt() && signal_pending(current))
+ return -1;
+ /*
+ * If the received CDB has aleady been ABORTED by the generic
+ * target engine, we now call transport_check_aborted_status()
+ * to queue any delated TASK_ABORTED status for the received CDB to the
+ * fabric module as we are expecting no futher incoming DATA OUT
+ * sequences at this point.
+ */
+ if (transport_check_aborted_status(cmd, 1) != 0)
+ return 0;
+
+ transport_add_cmd_to_queue(cmd, TRANSPORT_PROCESS_WRITE);
+ return 0;
+}
+EXPORT_SYMBOL(transport_generic_handle_data);
+
+/* transport_generic_handle_tmr():
+ *
+ *
+ */
+int transport_generic_handle_tmr(
+ struct se_cmd *cmd)
+{
+ /*
+ * This is needed for early exceptions.
+ */
+ cmd->transport_wait_for_tasks = &transport_generic_wait_for_tasks;
+ transport_device_setup_cmd(cmd);
+
+ transport_add_cmd_to_queue(cmd, TRANSPORT_PROCESS_TMR);
+ return 0;
+}
+EXPORT_SYMBOL(transport_generic_handle_tmr);
+
+static int transport_stop_tasks_for_cmd(struct se_cmd *cmd)
+{
+ struct se_task *task, *task_tmp;
+ unsigned long flags;
+ int ret = 0;
+
+ DEBUG_TS("ITT[0x%08x] - Stopping tasks\n",
+ CMD_TFO(cmd)->get_task_tag(cmd));
+
+ /*
+ * No tasks remain in the execution queue
+ */
+ spin_lock_irqsave(&T_TASK(cmd)->t_state_lock, flags);
+ list_for_each_entry_safe(task, task_tmp,
+ &T_TASK(cmd)->t_task_list, t_list) {
+ DEBUG_TS("task_no[%d] - Processing task %p\n",
+ task->task_no, task);
+ /*
+ * If the struct se_task has not been sent and is not active,
+ * remove the struct se_task from the execution queue.
+ */
+ if (!atomic_read(&task->task_sent) &&
+ !atomic_read(&task->task_active)) {
+ spin_unlock_irqrestore(&T_TASK(cmd)->t_state_lock,
+ flags);
+ transport_remove_task_from_execute_queue(task,
+ task->se_dev);
+
+ DEBUG_TS("task_no[%d] - Removed from execute queue\n",
+ task->task_no);
+ spin_lock_irqsave(&T_TASK(cmd)->t_state_lock, flags);
+ continue;
+ }
+
+ /*
+ * If the struct se_task is active, sleep until it is returned
+ * from the plugin.
+ */
+ if (atomic_read(&task->task_active)) {
+ atomic_set(&task->task_stop, 1);
+ spin_unlock_irqrestore(&T_TASK(cmd)->t_state_lock,
+ flags);
+
+ DEBUG_TS("task_no[%d] - Waiting to complete\n",
+ task->task_no);
+ wait_for_completion(&task->task_stop_comp);
+ DEBUG_TS("task_no[%d] - Stopped successfully\n",
+ task->task_no);
+
+ spin_lock_irqsave(&T_TASK(cmd)->t_state_lock, flags);
+ atomic_dec(&T_TASK(cmd)->t_task_cdbs_left);
+
+ atomic_set(&task->task_active, 0);
+ atomic_set(&task->task_stop, 0);
+ } else {
+ DEBUG_TS("task_no[%d] - Did nothing\n", task->task_no);
+ ret++;
+ }
+
+ __transport_stop_task_timer(task, &flags);
+ }
+ spin_unlock_irqrestore(&T_TASK(cmd)->t_state_lock, flags);
+
+ return ret;
+}
+
+static void transport_failure_reset_queue_depth(struct se_device *dev)
+{
+ unsigned long flags;
+
+ spin_lock_irqsave(&SE_HBA(dev)->hba_queue_lock, flags);;
+ atomic_inc(&dev->depth_left);
+ atomic_inc(&SE_HBA(dev)->left_queue_depth);
+ spin_unlock_irqrestore(&SE_HBA(dev)->hba_queue_lock, flags);
+}
+
+/*
+ * Handle SAM-esque emulation for generic transport request failures.
+ */
+static void transport_generic_request_failure(
+ struct se_cmd *cmd,
+ struct se_device *dev,
+ int complete,
+ int sc)
+{
+ DEBUG_GRF("-----[ Storage Engine Exception for cmd: %p ITT: 0x%08x"
+ " CDB: 0x%02x\n", cmd, CMD_TFO(cmd)->get_task_tag(cmd),
+ T_TASK(cmd)->t_task_cdb[0]);
+ DEBUG_GRF("-----[ i_state: %d t_state/def_t_state:"
+ " %d/%d transport_error_status: %d\n",
+ CMD_TFO(cmd)->get_cmd_state(cmd),
+ cmd->t_state, cmd->deferred_t_state,
+ cmd->transport_error_status);
+ DEBUG_GRF("-----[ t_task_cdbs: %d t_task_cdbs_left: %d"
+ " t_task_cdbs_sent: %d t_task_cdbs_ex_left: %d --"
+ " t_transport_active: %d t_transport_stop: %d"
+ " t_transport_sent: %d\n", T_TASK(cmd)->t_task_cdbs,
+ atomic_read(&T_TASK(cmd)->t_task_cdbs_left),
+ atomic_read(&T_TASK(cmd)->t_task_cdbs_sent),
+ atomic_read(&T_TASK(cmd)->t_task_cdbs_ex_left),
+ atomic_read(&T_TASK(cmd)->t_transport_active),
+ atomic_read(&T_TASK(cmd)->t_transport_stop),
+ atomic_read(&T_TASK(cmd)->t_transport_sent));
+
+ transport_stop_all_task_timers(cmd);
+
+ if (dev)
+ transport_failure_reset_queue_depth(dev);
+ /*
+ * For SAM Task Attribute emulation for failed struct se_cmd
+ */
+ if (cmd->se_dev->dev_task_attr_type == SAM_TASK_ATTR_EMULATED)
+ transport_complete_task_attr(cmd);
+
+ if (complete) {
+ transport_direct_request_timeout(cmd);
+ cmd->transport_error_status = PYX_TRANSPORT_LU_COMM_FAILURE;
+ }
+
+ switch (cmd->transport_error_status) {
+ case PYX_TRANSPORT_UNKNOWN_SAM_OPCODE:
+ cmd->scsi_sense_reason = TCM_UNSUPPORTED_SCSI_OPCODE;
+ break;
+ case PYX_TRANSPORT_REQ_TOO_MANY_SECTORS:
+ cmd->scsi_sense_reason = TCM_SECTOR_COUNT_TOO_MANY;
+ break;
+ case PYX_TRANSPORT_INVALID_CDB_FIELD:
+ cmd->scsi_sense_reason = TCM_INVALID_CDB_FIELD;
+ break;
+ case PYX_TRANSPORT_INVALID_PARAMETER_LIST:
+ cmd->scsi_sense_reason = TCM_INVALID_PARAMETER_LIST;
+ break;
+ case PYX_TRANSPORT_OUT_OF_MEMORY_RESOURCES:
+ if (!sc)
+ transport_new_cmd_failure(cmd);
+ /*
+ * Currently for PYX_TRANSPORT_OUT_OF_MEMORY_RESOURCES,
+ * we force this session to fall back to session
+ * recovery.
+ */
+ CMD_TFO(cmd)->fall_back_to_erl0(cmd->se_sess);
+ CMD_TFO(cmd)->stop_session(cmd->se_sess, 0, 0);
+
+ goto check_stop;
+ case PYX_TRANSPORT_LU_COMM_FAILURE:
+ case PYX_TRANSPORT_ILLEGAL_REQUEST:
+ cmd->scsi_sense_reason = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE;
+ break;
+ case PYX_TRANSPORT_UNKNOWN_MODE_PAGE:
+ cmd->scsi_sense_reason = TCM_UNKNOWN_MODE_PAGE;
+ break;
+ case PYX_TRANSPORT_WRITE_PROTECTED:
+ cmd->scsi_sense_reason = TCM_WRITE_PROTECTED;
+ break;
+ case PYX_TRANSPORT_RESERVATION_CONFLICT:
+ /*
+ * No SENSE Data payload for this case, set SCSI Status
+ * and queue the response to $FABRIC_MOD.
+ *
+ * Uses linux/include/scsi/scsi.h SAM status codes defs
+ */
+ cmd->scsi_status = SAM_STAT_RESERVATION_CONFLICT;
+ /*
+ * For UA Interlock Code 11b, a RESERVATION CONFLICT will
+ * establish a UNIT ATTENTION with PREVIOUS RESERVATION
+ * CONFLICT STATUS.
+ *
+ * See spc4r17, section 7.4.6 Control Mode Page, Table 349
+ */
+ if (SE_SESS(cmd) &&
+ DEV_ATTRIB(cmd->se_dev)->emulate_ua_intlck_ctrl == 2)
+ core_scsi3_ua_allocate(SE_SESS(cmd)->se_node_acl,
+ cmd->orig_fe_lun, 0x2C,
+ ASCQ_2CH_PREVIOUS_RESERVATION_CONFLICT_STATUS);
+
+ CMD_TFO(cmd)->queue_status(cmd);
+ goto check_stop;
+ case PYX_TRANSPORT_USE_SENSE_REASON:
+ /*
+ * struct se_cmd->scsi_sense_reason already set
+ */
+ break;
+ default:
+ printk(KERN_ERR "Unknown transport error for CDB 0x%02x: %d\n",
+ T_TASK(cmd)->t_task_cdb[0],
+ cmd->transport_error_status);
+ cmd->scsi_sense_reason = TCM_UNSUPPORTED_SCSI_OPCODE;
+ break;
+ }
+
+ if (!sc)
+ transport_new_cmd_failure(cmd);
+ else
+ transport_send_check_condition_and_sense(cmd,
+ cmd->scsi_sense_reason, 0);
+check_stop:
+ transport_lun_remove_cmd(cmd);
+ if (!(transport_cmd_check_stop_to_fabric(cmd)))
+ ;
+}
+
+static void transport_direct_request_timeout(struct se_cmd *cmd)
+{
+ unsigned long flags;
+
+ spin_lock_irqsave(&T_TASK(cmd)->t_state_lock, flags);
+ if (!(atomic_read(&T_TASK(cmd)->t_transport_timeout))) {
+ spin_unlock_irqrestore(&T_TASK(cmd)->t_state_lock, flags);
+ return;
+ }
+ if (atomic_read(&T_TASK(cmd)->t_task_cdbs_timeout_left)) {
+ spin_unlock_irqrestore(&T_TASK(cmd)->t_state_lock, flags);
+ return;
+ }
+
+ atomic_sub(atomic_read(&T_TASK(cmd)->t_transport_timeout),
+ &T_TASK(cmd)->t_se_count);
+ spin_unlock_irqrestore(&T_TASK(cmd)->t_state_lock, flags);
+}
+
+static void transport_generic_request_timeout(struct se_cmd *cmd)
+{
+ unsigned long flags;
+
+ /*
+ * Reset T_TASK(cmd)->t_se_count to allow transport_generic_remove()
+ * to allow last call to free memory resources.
+ */
+ spin_lock_irqsave(&T_TASK(cmd)->t_state_lock, flags);
+ if (atomic_read(&T_TASK(cmd)->t_transport_timeout) > 1) {
+ int tmp = (atomic_read(&T_TASK(cmd)->t_transport_timeout) - 1);
+
+ atomic_sub(tmp, &T_TASK(cmd)->t_se_count);
+ }
+ spin_unlock_irqrestore(&T_TASK(cmd)->t_state_lock, flags);
+
+ transport_generic_remove(cmd, 0, 0);
+}
+
+static int
+transport_generic_allocate_buf(struct se_cmd *cmd, u32 data_length)
+{
+ unsigned char *buf;
+
+ buf = kzalloc(data_length, GFP_KERNEL);
+ if (!(buf)) {
+ printk(KERN_ERR "Unable to allocate memory for buffer\n");
+ return -1;
+ }
+
+ T_TASK(cmd)->t_tasks_se_num = 0;
+ T_TASK(cmd)->t_task_buf = buf;
+
+ return 0;
+}
+
+static inline u32 transport_lba_21(unsigned char *cdb)
+{
+ return ((cdb[1] & 0x1f) << 16) | (cdb[2] << 8) | cdb[3];
+}
+
+static inline u32 transport_lba_32(unsigned char *cdb)
+{
+ return (cdb[2] << 24) | (cdb[3] << 16) | (cdb[4] << 8) | cdb[5];
+}
+
+static inline unsigned long long transport_lba_64(unsigned char *cdb)
+{
+ unsigned int __v1, __v2;
+
+ __v1 = (cdb[2] << 24) | (cdb[3] << 16) | (cdb[4] << 8) | cdb[5];
+ __v2 = (cdb[6] << 24) | (cdb[7] << 16) | (cdb[8] << 8) | cdb[9];
+
+ return ((unsigned long long)__v2) | (unsigned long long)__v1 << 32;
+}
+
+/*
+ * For VARIABLE_LENGTH_CDB w/ 32 byte extended CDBs
+ */
+static inline unsigned long long transport_lba_64_ext(unsigned char *cdb)
+{
+ unsigned int __v1, __v2;
+
+ __v1 = (cdb[12] << 24) | (cdb[13] << 16) | (cdb[14] << 8) | cdb[15];
+ __v2 = (cdb[16] << 24) | (cdb[17] << 16) | (cdb[18] << 8) | cdb[19];
+
+ return ((unsigned long long)__v2) | (unsigned long long)__v1 << 32;
+}
+
+static void transport_set_supported_SAM_opcode(struct se_cmd *se_cmd)
+{
+ unsigned long flags;
+
+ spin_lock_irqsave(&T_TASK(se_cmd)->t_state_lock, flags);
+ se_cmd->se_cmd_flags |= SCF_SUPPORTED_SAM_OPCODE;
+ spin_unlock_irqrestore(&T_TASK(se_cmd)->t_state_lock, flags);
+}
+
+/*
+ * Called from interrupt context.
+ */
+static void transport_task_timeout_handler(unsigned long data)
+{
+ struct se_task *task = (struct se_task *)data;
+ struct se_cmd *cmd = TASK_CMD(task);
+ unsigned long flags;
+
+ DEBUG_TT("transport task timeout fired! task: %p cmd: %p\n", task, cmd);
+
+ spin_lock_irqsave(&T_TASK(cmd)->t_state_lock, flags);
+ if (task->task_flags & TF_STOP) {
+ spin_unlock_irqrestore(&T_TASK(cmd)->t_state_lock, flags);
+ return;
+ }
+ task->task_flags &= ~TF_RUNNING;
+
+ /*
+ * Determine if transport_complete_task() has already been called.
+ */
+ if (!(atomic_read(&task->task_active))) {
+ DEBUG_TT("transport task: %p cmd: %p timeout task_active"
+ " == 0\n", task, cmd);
+ spin_unlock_irqrestore(&T_TASK(cmd)->t_state_lock, flags);
+ return;
+ }
+
+ atomic_inc(&T_TASK(cmd)->t_se_count);
+ atomic_inc(&T_TASK(cmd)->t_transport_timeout);
+ T_TASK(cmd)->t_tasks_failed = 1;
+
+ atomic_set(&task->task_timeout, 1);
+ task->task_error_status = PYX_TRANSPORT_TASK_TIMEOUT;
+ task->task_scsi_status = 1;
+
+ if (atomic_read(&task->task_stop)) {
+ DEBUG_TT("transport task: %p cmd: %p timeout task_stop"
+ " == 1\n", task, cmd);
+ spin_unlock_irqrestore(&T_TASK(cmd)->t_state_lock, flags);
+ complete(&task->task_stop_comp);
+ return;
+ }
+
+ if (!(atomic_dec_and_test(&T_TASK(cmd)->t_task_cdbs_left))) {
+ DEBUG_TT("transport task: %p cmd: %p timeout non zero"
+ " t_task_cdbs_left\n", task, cmd);
+ spin_unlock_irqrestore(&T_TASK(cmd)->t_state_lock, flags);
+ return;
+ }
+ DEBUG_TT("transport task: %p cmd: %p timeout ZERO t_task_cdbs_left\n",
+ task, cmd);
+
+ cmd->t_state = TRANSPORT_COMPLETE_FAILURE;
+ spin_unlock_irqrestore(&T_TASK(cmd)->t_state_lock, flags);
+
+ transport_add_cmd_to_queue(cmd, TRANSPORT_COMPLETE_FAILURE);
+}
+
+/*
+ * Called with T_TASK(cmd)->t_state_lock held.
+ */
+static void transport_start_task_timer(struct se_task *task)
+{
+ struct se_device *dev = task->se_dev;
+ int timeout;
+
+ if (task->task_flags & TF_RUNNING)
+ return;
+ /*
+ * If the task_timeout is disabled, exit now.
+ */
+ timeout = DEV_ATTRIB(dev)->task_timeout;
+ if (!(timeout))
+ return;
+
+ init_timer(&task->task_timer);
+ task->task_timer.expires = (get_jiffies_64() + timeout * HZ);
+ task->task_timer.data = (unsigned long) task;
+ task->task_timer.function = transport_task_timeout_handler;
+
+ task->task_flags |= TF_RUNNING;
+ add_timer(&task->task_timer);
+#if 0
+ printk(KERN_INFO "Starting task timer for cmd: %p task: %p seconds:"
+ " %d\n", task->task_se_cmd, task, timeout);
+#endif
+}
+
+/*
+ * Called with spin_lock_irq(&T_TASK(cmd)->t_state_lock) held.
+ */
+void __transport_stop_task_timer(struct se_task *task, unsigned long *flags)
+{
+ struct se_cmd *cmd = TASK_CMD(task);
+
+ if (!(task->task_flags & TF_RUNNING))
+ return;
+
+ task->task_flags |= TF_STOP;
+ spin_unlock_irqrestore(&T_TASK(cmd)->t_state_lock, *flags);
+
+ del_timer_sync(&task->task_timer);
+
+ spin_lock_irqsave(&T_TASK(cmd)->t_state_lock, *flags);
+ task->task_flags &= ~TF_RUNNING;
+ task->task_flags &= ~TF_STOP;
+}
+
+static void transport_stop_all_task_timers(struct se_cmd *cmd)
+{
+ struct se_task *task = NULL, *task_tmp;
+ unsigned long flags;
+
+ spin_lock_irqsave(&T_TASK(cmd)->t_state_lock, flags);
+ list_for_each_entry_safe(task, task_tmp,
+ &T_TASK(cmd)->t_task_list, t_list)
+ __transport_stop_task_timer(task, &flags);
+ spin_unlock_irqrestore(&T_TASK(cmd)->t_state_lock, flags);
+}
+
+static inline int transport_tcq_window_closed(struct se_device *dev)
+{
+ if (dev->dev_tcq_window_closed++ <
+ PYX_TRANSPORT_WINDOW_CLOSED_THRESHOLD) {
+ msleep(PYX_TRANSPORT_WINDOW_CLOSED_WAIT_SHORT);
+ } else
+ msleep(PYX_TRANSPORT_WINDOW_CLOSED_WAIT_LONG);
+
+ wake_up_interruptible(&dev->dev_queue_obj->thread_wq);
+ return 0;
+}
+
+/*
+ * Called from Fabric Module context from transport_execute_tasks()
+ *
+ * The return of this function determins if the tasks from struct se_cmd
+ * get added to the execution queue in transport_execute_tasks(),
+ * or are added to the delayed or ordered lists here.
+ */
+static inline int transport_execute_task_attr(struct se_cmd *cmd)
+{
+ if (SE_DEV(cmd)->dev_task_attr_type != SAM_TASK_ATTR_EMULATED)
+ return 1;
+ /*
+ * Check for the existance of HEAD_OF_QUEUE, and if true return 1
+ * to allow the passed struct se_cmd list of tasks to the front of the list.
+ */
+ if (cmd->sam_task_attr == TASK_ATTR_HOQ) {
+ atomic_inc(&SE_DEV(cmd)->dev_hoq_count);
+ smp_mb__after_atomic_inc();
+ DEBUG_STA("Added HEAD_OF_QUEUE for CDB:"
+ " 0x%02x, se_ordered_id: %u\n",
+ T_TASK(cmd)->t_task_cdb[0],
+ cmd->se_ordered_id);
+ return 1;
+ } else if (cmd->sam_task_attr == TASK_ATTR_ORDERED) {
+ spin_lock(&SE_DEV(cmd)->ordered_cmd_lock);
+ list_add_tail(&cmd->se_ordered_list,
+ &SE_DEV(cmd)->ordered_cmd_list);
+ spin_unlock(&SE_DEV(cmd)->ordered_cmd_lock);
+
+ atomic_inc(&SE_DEV(cmd)->dev_ordered_sync);
+ smp_mb__after_atomic_inc();
+
+ DEBUG_STA("Added ORDERED for CDB: 0x%02x to ordered"
+ " list, se_ordered_id: %u\n",
+ T_TASK(cmd)->t_task_cdb[0],
+ cmd->se_ordered_id);
+ /*
+ * Add ORDERED command to tail of execution queue if
+ * no other older commands exist that need to be
+ * completed first.
+ */
+ if (!(atomic_read(&SE_DEV(cmd)->simple_cmds)))
+ return 1;
+ } else {
+ /*
+ * For SIMPLE and UNTAGGED Task Attribute commands
+ */
+ atomic_inc(&SE_DEV(cmd)->simple_cmds);
+ smp_mb__after_atomic_inc();
+ }
+ /*
+ * Otherwise if one or more outstanding ORDERED task attribute exist,
+ * add the dormant task(s) built for the passed struct se_cmd to the
+ * execution queue and become in Active state for this struct se_device.
+ */
+ if (atomic_read(&SE_DEV(cmd)->dev_ordered_sync) != 0) {
+ /*
+ * Otherwise, add cmd w/ tasks to delayed cmd queue that
+ * will be drained upon competion of HEAD_OF_QUEUE task.
+ */
+ spin_lock(&SE_DEV(cmd)->delayed_cmd_lock);
+ cmd->se_cmd_flags |= SCF_DELAYED_CMD_FROM_SAM_ATTR;
+ list_add_tail(&cmd->se_delayed_list,
+ &SE_DEV(cmd)->delayed_cmd_list);
+ spin_unlock(&SE_DEV(cmd)->delayed_cmd_lock);
+
+ DEBUG_STA("Added CDB: 0x%02x Task Attr: 0x%02x to"
+ " delayed CMD list, se_ordered_id: %u\n",
+ T_TASK(cmd)->t_task_cdb[0], cmd->sam_task_attr,
+ cmd->se_ordered_id);
+ /*
+ * Return zero to let transport_execute_tasks() know
+ * not to add the delayed tasks to the execution list.
+ */
+ return 0;
+ }
+ /*
+ * Otherwise, no ORDERED task attributes exist..
+ */
+ return 1;
+}
+
+/*
+ * Called from fabric module context in transport_generic_new_cmd() and
+ * transport_generic_process_write()
+ */
+static int transport_execute_tasks(struct se_cmd *cmd)
+{
+ int add_tasks;
+
+ if (!(cmd->se_cmd_flags & SCF_SE_DISABLE_ONLINE_CHECK)) {
+ if (se_dev_check_online(cmd->se_orig_obj_ptr) != 0) {
+ cmd->transport_error_status =
+ PYX_TRANSPORT_LU_COMM_FAILURE;
+ transport_generic_request_failure(cmd, NULL, 0, 1);
+ return 0;
+ }
+ }
+ /*
+ * Call transport_cmd_check_stop() to see if a fabric exception
+ * has occured that prevents execution.
+ */
+ if (!(transport_cmd_check_stop(cmd, 0, TRANSPORT_PROCESSING))) {
+ /*
+ * Check for SAM Task Attribute emulation and HEAD_OF_QUEUE
+ * attribute for the tasks of the received struct se_cmd CDB
+ */
+ add_tasks = transport_execute_task_attr(cmd);
+ if (add_tasks == 0)
+ goto execute_tasks;
+ /*
+ * This calls transport_add_tasks_from_cmd() to handle
+ * HEAD_OF_QUEUE ordering for SAM Task Attribute emulation
+ * (if enabled) in __transport_add_task_to_execute_queue() and
+ * transport_add_task_check_sam_attr().
+ */
+ transport_add_tasks_from_cmd(cmd);
+ }
+ /*
+ * Kick the execution queue for the cmd associated struct se_device
+ * storage object.
+ */
+execute_tasks:
+ __transport_execute_tasks(SE_DEV(cmd));
+ return 0;
+}
+
+/*
+ * Called to check struct se_device tcq depth window, and once open pull struct se_task
+ * from struct se_device->execute_task_list and
+ *
+ * Called from transport_processing_thread()
+ */
+static int __transport_execute_tasks(struct se_device *dev)
+{
+ int error;
+ struct se_cmd *cmd = NULL;
+ struct se_task *task;
+ unsigned long flags;
+
+ /*
+ * Check if there is enough room in the device and HBA queue to send
+ * struct se_transport_task's to the selected transport.
+ */
+check_depth:
+ spin_lock_irqsave(&SE_HBA(dev)->hba_queue_lock, flags);
+ if (!(atomic_read(&dev->depth_left)) ||
+ !(atomic_read(&SE_HBA(dev)->left_queue_depth))) {
+ spin_unlock_irqrestore(&SE_HBA(dev)->hba_queue_lock, flags);
+ return transport_tcq_window_closed(dev);
+ }
+ dev->dev_tcq_window_closed = 0;
+
+ spin_lock(&dev->execute_task_lock);
+ task = transport_get_task_from_execute_queue(dev);
+ spin_unlock(&dev->execute_task_lock);
+
+ if (!task) {
+ spin_unlock_irqrestore(&SE_HBA(dev)->hba_queue_lock, flags);
+ return 0;
+ }
+
+ atomic_dec(&dev->depth_left);
+ atomic_dec(&SE_HBA(dev)->left_queue_depth);
+ spin_unlock_irqrestore(&SE_HBA(dev)->hba_queue_lock, flags);
+
+ cmd = TASK_CMD(task);
+
+ spin_lock_irqsave(&T_TASK(cmd)->t_state_lock, flags);
+ atomic_set(&task->task_active, 1);
+ atomic_set(&task->task_sent, 1);
+ atomic_inc(&T_TASK(cmd)->t_task_cdbs_sent);
+
+ if (atomic_read(&T_TASK(cmd)->t_task_cdbs_sent) ==
+ T_TASK(cmd)->t_task_cdbs)
+ atomic_set(&cmd->transport_sent, 1);
+
+ transport_start_task_timer(task);
+ spin_unlock_irqrestore(&T_TASK(cmd)->t_state_lock, flags);
+ /*
+ * The struct se_cmd->transport_emulate_cdb() function pointer is used
+ * to grab REPORT_LUNS CDBs before they hit the
+ * struct se_subsystem_api->do_task() caller below.
+ */
+ if (cmd->transport_emulate_cdb) {
+ error = cmd->transport_emulate_cdb(cmd);
+ if (error != 0) {
+ cmd->transport_error_status = error;
+ atomic_set(&task->task_active, 0);
+ atomic_set(&cmd->transport_sent, 0);
+ transport_stop_tasks_for_cmd(cmd);
+ transport_generic_request_failure(cmd, dev, 0, 1);
+ goto check_depth;
+ }
+ /*
+ * Handle the successful completion for transport_emulate_cdb()
+ * for synchronous operation, following SCF_EMULATE_CDB_ASYNC
+ * Otherwise the caller is expected to complete the task with
+ * proper status.
+ */
+ if (!(cmd->se_cmd_flags & SCF_EMULATE_CDB_ASYNC)) {
+ cmd->scsi_status = SAM_STAT_GOOD;
+ task->task_scsi_status = GOOD;
+ transport_complete_task(task, 1);
+ }
+ } else {
+ /*
+ * Currently for all virtual TCM plugins including IBLOCK, FILEIO and
+ * RAMDISK we use the internal transport_emulate_control_cdb() logic
+ * with struct se_subsystem_api callers for the primary SPC-3 TYPE_DISK
+ * LUN emulation code.
+ *
+ * For TCM/pSCSI and all other SCF_SCSI_DATA_SG_IO_CDB I/O tasks we
+ * call ->do_task() directly and let the underlying TCM subsystem plugin
+ * code handle the CDB emulation.
+ */
+ if ((TRANSPORT(dev)->transport_type != TRANSPORT_PLUGIN_PHBA_PDEV) &&
+ (!(TASK_CMD(task)->se_cmd_flags & SCF_SCSI_DATA_SG_IO_CDB)))
+ error = transport_emulate_control_cdb(task);
+ else
+ error = TRANSPORT(dev)->do_task(task);
+
+ if (error != 0) {
+ cmd->transport_error_status = error;
+ atomic_set(&task->task_active, 0);
+ atomic_set(&cmd->transport_sent, 0);
+ transport_stop_tasks_for_cmd(cmd);
+ transport_generic_request_failure(cmd, dev, 0, 1);
+ }
+ }
+
+ goto check_depth;
+
+ return 0;
+}
+
+static void transport_new_cmd_failure(struct se_cmd *se_cmd)
+{
+ unsigned long flags;
+ /*
+ * Any unsolicited data will get dumped for failed command inside of
+ * the fabric plugin
+ */
+ spin_lock_irqsave(&T_TASK(se_cmd)->t_state_lock, flags);
+ se_cmd->se_cmd_flags |= SCF_SE_CMD_FAILED;
+ se_cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION;
+ spin_unlock_irqrestore(&T_TASK(se_cmd)->t_state_lock, flags);
+
+ CMD_TFO(se_cmd)->new_cmd_failure(se_cmd);
+}
+
+static void transport_nop_wait_for_tasks(struct se_cmd *, int, int);
+
+static inline u32 transport_get_sectors_6(
+ unsigned char *cdb,
+ struct se_cmd *cmd,
+ int *ret)
+{
+ struct se_device *dev = SE_LUN(cmd)->lun_se_dev;
+
+ /*
+ * Assume TYPE_DISK for non struct se_device objects.
+ * Use 8-bit sector value.
+ */
+ if (!dev)
+ goto type_disk;
+
+ /*
+ * Use 24-bit allocation length for TYPE_TAPE.
+ */
+ if (TRANSPORT(dev)->get_device_type(dev) == TYPE_TAPE)
+ return (u32)(cdb[2] << 16) + (cdb[3] << 8) + cdb[4];
+
+ /*
+ * Everything else assume TYPE_DISK Sector CDB location.
+ * Use 8-bit sector value.
+ */
+type_disk:
+ return (u32)cdb[4];
+}
+
+static inline u32 transport_get_sectors_10(
+ unsigned char *cdb,
+ struct se_cmd *cmd,
+ int *ret)
+{
+ struct se_device *dev = SE_LUN(cmd)->lun_se_dev;
+
+ /*
+ * Assume TYPE_DISK for non struct se_device objects.
+ * Use 16-bit sector value.
+ */
+ if (!dev)
+ goto type_disk;
+
+ /*
+ * XXX_10 is not defined in SSC, throw an exception
+ */
+ if (TRANSPORT(dev)->get_device_type(dev) == TYPE_TAPE) {
+ *ret = -1;
+ return 0;
+ }
+
+ /*
+ * Everything else assume TYPE_DISK Sector CDB location.
+ * Use 16-bit sector value.
+ */
+type_disk:
+ return (u32)(cdb[7] << 8) + cdb[8];
+}
+
+static inline u32 transport_get_sectors_12(
+ unsigned char *cdb,
+ struct se_cmd *cmd,
+ int *ret)
+{
+ struct se_device *dev = SE_LUN(cmd)->lun_se_dev;
+
+ /*
+ * Assume TYPE_DISK for non struct se_device objects.
+ * Use 32-bit sector value.
+ */
+ if (!dev)
+ goto type_disk;
+
+ /*
+ * XXX_12 is not defined in SSC, throw an exception
+ */
+ if (TRANSPORT(dev)->get_device_type(dev) == TYPE_TAPE) {
+ *ret = -1;
+ return 0;
+ }
+
+ /*
+ * Everything else assume TYPE_DISK Sector CDB location.
+ * Use 32-bit sector value.
+ */
+type_disk:
+ return (u32)(cdb[6] << 24) + (cdb[7] << 16) + (cdb[8] << 8) + cdb[9];
+}
+
+static inline u32 transport_get_sectors_16(
+ unsigned char *cdb,
+ struct se_cmd *cmd,
+ int *ret)
+{
+ struct se_device *dev = SE_LUN(cmd)->lun_se_dev;
+
+ /*
+ * Assume TYPE_DISK for non struct se_device objects.
+ * Use 32-bit sector value.
+ */
+ if (!dev)
+ goto type_disk;
+
+ /*
+ * Use 24-bit allocation length for TYPE_TAPE.
+ */
+ if (TRANSPORT(dev)->get_device_type(dev) == TYPE_TAPE)
+ return (u32)(cdb[12] << 16) + (cdb[13] << 8) + cdb[14];
+
+type_disk:
+ return (u32)(cdb[10] << 24) + (cdb[11] << 16) +
+ (cdb[12] << 8) + cdb[13];
+}
+
+/*
+ * Used for VARIABLE_LENGTH_CDB WRITE_32 and READ_32 variants
+ */
+static inline u32 transport_get_sectors_32(
+ unsigned char *cdb,
+ struct se_cmd *cmd,
+ int *ret)
+{
+ /*
+ * Assume TYPE_DISK for non struct se_device objects.
+ * Use 32-bit sector value.
+ */
+ return (u32)(cdb[28] << 24) + (cdb[29] << 16) +
+ (cdb[30] << 8) + cdb[31];
+
+}
+
+static inline u32 transport_get_size(
+ u32 sectors,
+ unsigned char *cdb,
+ struct se_cmd *cmd)
+{
+ struct se_device *dev = SE_DEV(cmd);
+
+ if (TRANSPORT(dev)->get_device_type(dev) == TYPE_TAPE) {
+ if (cdb[1] & 1) { /* sectors */
+ return DEV_ATTRIB(dev)->block_size * sectors;
+ } else /* bytes */
+ return sectors;
+ }
+#if 0
+ printk(KERN_INFO "Returning block_size: %u, sectors: %u == %u for"
+ " %s object\n", DEV_ATTRIB(dev)->block_size, sectors,
+ DEV_ATTRIB(dev)->block_size * sectors,
+ TRANSPORT(dev)->name);
+#endif
+ return DEV_ATTRIB(dev)->block_size * sectors;
+}
+
+unsigned char transport_asciihex_to_binaryhex(unsigned char val[2])
+{
+ unsigned char result = 0;
+ /*
+ * MSB
+ */
+ if ((val[0] >= 'a') && (val[0] <= 'f'))
+ result = ((val[0] - 'a' + 10) & 0xf) << 4;
+ else
+ if ((val[0] >= 'A') && (val[0] <= 'F'))
+ result = ((val[0] - 'A' + 10) & 0xf) << 4;
+ else /* digit */
+ result = ((val[0] - '0') & 0xf) << 4;
+ /*
+ * LSB
+ */
+ if ((val[1] >= 'a') && (val[1] <= 'f'))
+ result |= ((val[1] - 'a' + 10) & 0xf);
+ else
+ if ((val[1] >= 'A') && (val[1] <= 'F'))
+ result |= ((val[1] - 'A' + 10) & 0xf);
+ else /* digit */
+ result |= ((val[1] - '0') & 0xf);
+
+ return result;
+}
+EXPORT_SYMBOL(transport_asciihex_to_binaryhex);
+
+static void transport_xor_callback(struct se_cmd *cmd)
+{
+ unsigned char *buf, *addr;
+ struct se_mem *se_mem;
+ unsigned int offset;
+ int i;
+ /*
+ * From sbc3r22.pdf section 5.48 XDWRITEREAD (10) command
+ *
+ * 1) read the specified logical block(s);
+ * 2) transfer logical blocks from the data-out buffer;
+ * 3) XOR the logical blocks transferred from the data-out buffer with
+ * the logical blocks read, storing the resulting XOR data in a buffer;
+ * 4) if the DISABLE WRITE bit is set to zero, then write the logical
+ * blocks transferred from the data-out buffer; and
+ * 5) transfer the resulting XOR data to the data-in buffer.
+ */
+ buf = kmalloc(cmd->data_length, GFP_KERNEL);
+ if (!(buf)) {
+ printk(KERN_ERR "Unable to allocate xor_callback buf\n");
+ return;
+ }
+ /*
+ * Copy the scatterlist WRITE buffer located at T_TASK(cmd)->t_mem_list
+ * into the locally allocated *buf
+ */
+ transport_memcpy_se_mem_read_contig(cmd, buf, T_TASK(cmd)->t_mem_list);
+ /*
+ * Now perform the XOR against the BIDI read memory located at
+ * T_TASK(cmd)->t_mem_bidi_list
+ */
+
+ offset = 0;
+ list_for_each_entry(se_mem, T_TASK(cmd)->t_mem_bidi_list, se_list) {
+ addr = (unsigned char *)kmap_atomic(se_mem->se_page, KM_USER0);
+ if (!(addr))
+ goto out;
+
+ for (i = 0; i < se_mem->se_len; i++)
+ *(addr + se_mem->se_off + i) ^= *(buf + offset + i);
+
+ offset += se_mem->se_len;
+ kunmap_atomic(addr, KM_USER0);
+ }
+out:
+ kfree(buf);
+}
+
+/*
+ * Used to obtain Sense Data from underlying Linux/SCSI struct scsi_cmnd
+ */
+static int transport_get_sense_data(struct se_cmd *cmd)
+{
+ unsigned char *buffer = cmd->sense_buffer, *sense_buffer = NULL;
+ struct se_device *dev;
+ struct se_task *task = NULL, *task_tmp;
+ unsigned long flags;
+ u32 offset = 0;
+
+ if (!SE_LUN(cmd)) {
+ printk(KERN_ERR "SE_LUN(cmd) is NULL\n");
+ return -1;
+ }
+ spin_lock_irqsave(&T_TASK(cmd)->t_state_lock, flags);
+ if (cmd->se_cmd_flags & SCF_SENT_CHECK_CONDITION) {
+ spin_unlock_irqrestore(&T_TASK(cmd)->t_state_lock, flags);
+ return 0;
+ }
+
+ list_for_each_entry_safe(task, task_tmp,
+ &T_TASK(cmd)->t_task_list, t_list) {
+
+ if (!task->task_sense)
+ continue;
+
+ dev = task->se_dev;
+ if (!(dev))
+ continue;
+
+ if (!TRANSPORT(dev)->get_sense_buffer) {
+ printk(KERN_ERR "TRANSPORT(dev)->get_sense_buffer"
+ " is NULL\n");
+ continue;
+ }
+
+ sense_buffer = TRANSPORT(dev)->get_sense_buffer(task);
+ if (!(sense_buffer)) {
+ printk(KERN_ERR "ITT[0x%08x]_TASK[%d]: Unable to locate"
+ " sense buffer for task with sense\n",
+ CMD_TFO(cmd)->get_task_tag(cmd), task->task_no);
+ continue;
+ }
+ spin_unlock_irqrestore(&T_TASK(cmd)->t_state_lock, flags);
+
+ offset = CMD_TFO(cmd)->set_fabric_sense_len(cmd,
+ TRANSPORT_SENSE_BUFFER);
+
+ memcpy((void *)&buffer[offset], (void *)sense_buffer,
+ TRANSPORT_SENSE_BUFFER);
+ cmd->scsi_status = task->task_scsi_status;
+ /* Automatically padded */
+ cmd->scsi_sense_length =
+ (TRANSPORT_SENSE_BUFFER + offset);
+
+ printk(KERN_INFO "HBA_[%u]_PLUG[%s]: Set SAM STATUS: 0x%02x"
+ " and sense\n",
+ dev->se_hba->hba_id, TRANSPORT(dev)->name,
+ cmd->scsi_status);
+ return 0;
+ }
+ spin_unlock_irqrestore(&T_TASK(cmd)->t_state_lock, flags);
+
+ return -1;
+}
+
+static int transport_allocate_resources(struct se_cmd *cmd)
+{
+ u32 length = cmd->data_length;
+
+ if ((cmd->se_cmd_flags & SCF_SCSI_DATA_SG_IO_CDB) ||
+ (cmd->se_cmd_flags & SCF_SCSI_CONTROL_SG_IO_CDB))
+ return transport_generic_get_mem(cmd, length, PAGE_SIZE);
+ else if (cmd->se_cmd_flags & SCF_SCSI_CONTROL_NONSG_IO_CDB)
+ return transport_generic_allocate_buf(cmd, length);
+ else
+ return 0;
+}
+
+static int
+transport_handle_reservation_conflict(struct se_cmd *cmd)
+{
+ cmd->transport_wait_for_tasks = &transport_nop_wait_for_tasks;
+ cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION;
+ cmd->se_cmd_flags |= SCF_SCSI_RESERVATION_CONFLICT;
+ cmd->scsi_status = SAM_STAT_RESERVATION_CONFLICT;
+ /*
+ * For UA Interlock Code 11b, a RESERVATION CONFLICT will
+ * establish a UNIT ATTENTION with PREVIOUS RESERVATION
+ * CONFLICT STATUS.
+ *
+ * See spc4r17, section 7.4.6 Control Mode Page, Table 349
+ */
+ if (SE_SESS(cmd) &&
+ DEV_ATTRIB(cmd->se_dev)->emulate_ua_intlck_ctrl == 2)
+ core_scsi3_ua_allocate(SE_SESS(cmd)->se_node_acl,
+ cmd->orig_fe_lun, 0x2C,
+ ASCQ_2CH_PREVIOUS_RESERVATION_CONFLICT_STATUS);
+ return -2;
+}
+
+/* transport_generic_cmd_sequencer():
+ *
+ * Generic Command Sequencer that should work for most DAS transport
+ * drivers.
+ *
+ * Called from transport_generic_allocate_tasks() in the $FABRIC_MOD
+ * RX Thread.
+ *
+ * FIXME: Need to support other SCSI OPCODES where as well.
+ */
+static int transport_generic_cmd_sequencer(
+ struct se_cmd *cmd,
+ unsigned char *cdb)
+{
+ struct se_device *dev = SE_DEV(cmd);
+ struct se_subsystem_dev *su_dev = dev->se_sub_dev;
+ int ret = 0, sector_ret = 0, passthrough;
+ u32 sectors = 0, size = 0, pr_reg_type = 0;
+ u16 service_action;
+ u8 alua_ascq = 0;
+ /*
+ * Check for an existing UNIT ATTENTION condition
+ */
+ if (core_scsi3_ua_check(cmd, cdb) < 0) {
+ cmd->transport_wait_for_tasks =
+ &transport_nop_wait_for_tasks;
+ cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION;
+ cmd->scsi_sense_reason = TCM_CHECK_CONDITION_UNIT_ATTENTION;
+ return -2;
+ }
+ /*
+ * Check status of Asymmetric Logical Unit Assignment port
+ */
+ ret = T10_ALUA(su_dev)->alua_state_check(cmd, cdb, &alua_ascq);
+ if (ret != 0) {
+ cmd->transport_wait_for_tasks = &transport_nop_wait_for_tasks;
+ /*
+ * Set SCSI additional sense code (ASC) to 'LUN Not Accessable';
+ * The ALUA additional sense code qualifier (ASCQ) is determined
+ * by the ALUA primary or secondary access state..
+ */
+ if (ret > 0) {
+#if 0
+ printk(KERN_INFO "[%s]: ALUA TG Port not available,"
+ " SenseKey: NOT_READY, ASC/ASCQ: 0x04/0x%02x\n",
+ CMD_TFO(cmd)->get_fabric_name(), alua_ascq);
+#endif
+ transport_set_sense_codes(cmd, 0x04, alua_ascq);
+ cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION;
+ cmd->scsi_sense_reason = TCM_CHECK_CONDITION_NOT_READY;
+ return -2;
+ }
+ goto out_invalid_cdb_field;
+ }
+ /*
+ * Check status for SPC-3 Persistent Reservations
+ */
+ if (T10_PR_OPS(su_dev)->t10_reservation_check(cmd, &pr_reg_type) != 0) {
+ if (T10_PR_OPS(su_dev)->t10_seq_non_holder(
+ cmd, cdb, pr_reg_type) != 0)
+ return transport_handle_reservation_conflict(cmd);
+ /*
+ * This means the CDB is allowed for the SCSI Initiator port
+ * when said port is *NOT* holding the legacy SPC-2 or
+ * SPC-3 Persistent Reservation.
+ */
+ }
+
+ switch (cdb[0]) {
+ case READ_6:
+ sectors = transport_get_sectors_6(cdb, cmd, §or_ret);
+ if (sector_ret)
+ goto out_unsupported_cdb;
+ size = transport_get_size(sectors, cdb, cmd);
+ cmd->transport_split_cdb = &split_cdb_XX_6;
+ T_TASK(cmd)->t_task_lba = transport_lba_21(cdb);
+ cmd->se_cmd_flags |= SCF_SCSI_DATA_SG_IO_CDB;
+ break;
+ case READ_10:
+ sectors = transport_get_sectors_10(cdb, cmd, §or_ret);
+ if (sector_ret)
+ goto out_unsupported_cdb;
+ size = transport_get_size(sectors, cdb, cmd);
+ cmd->transport_split_cdb = &split_cdb_XX_10;
+ T_TASK(cmd)->t_task_lba = transport_lba_32(cdb);
+ cmd->se_cmd_flags |= SCF_SCSI_DATA_SG_IO_CDB;
+ break;
+ case READ_12:
+ sectors = transport_get_sectors_12(cdb, cmd, §or_ret);
+ if (sector_ret)
+ goto out_unsupported_cdb;
+ size = transport_get_size(sectors, cdb, cmd);
+ cmd->transport_split_cdb = &split_cdb_XX_12;
+ T_TASK(cmd)->t_task_lba = transport_lba_32(cdb);
+ cmd->se_cmd_flags |= SCF_SCSI_DATA_SG_IO_CDB;
+ break;
+ case READ_16:
+ sectors = transport_get_sectors_16(cdb, cmd, §or_ret);
+ if (sector_ret)
+ goto out_unsupported_cdb;
+ size = transport_get_size(sectors, cdb, cmd);
+ cmd->transport_split_cdb = &split_cdb_XX_16;
+ T_TASK(cmd)->t_task_lba = transport_lba_64(cdb);
+ cmd->se_cmd_flags |= SCF_SCSI_DATA_SG_IO_CDB;
+ break;
+ case WRITE_6:
+ sectors = transport_get_sectors_6(cdb, cmd, §or_ret);
+ if (sector_ret)
+ goto out_unsupported_cdb;
+ size = transport_get_size(sectors, cdb, cmd);
+ cmd->transport_split_cdb = &split_cdb_XX_6;
+ T_TASK(cmd)->t_task_lba = transport_lba_21(cdb);
+ cmd->se_cmd_flags |= SCF_SCSI_DATA_SG_IO_CDB;
+ break;
+ case WRITE_10:
+ sectors = transport_get_sectors_10(cdb, cmd, §or_ret);
+ if (sector_ret)
+ goto out_unsupported_cdb;
+ size = transport_get_size(sectors, cdb, cmd);
+ cmd->transport_split_cdb = &split_cdb_XX_10;
+ T_TASK(cmd)->t_task_lba = transport_lba_32(cdb);
+ T_TASK(cmd)->t_tasks_fua = (cdb[1] & 0x8);
+ cmd->se_cmd_flags |= SCF_SCSI_DATA_SG_IO_CDB;
+ break;
+ case WRITE_12:
+ sectors = transport_get_sectors_12(cdb, cmd, §or_ret);
+ if (sector_ret)
+ goto out_unsupported_cdb;
+ size = transport_get_size(sectors, cdb, cmd);
+ cmd->transport_split_cdb = &split_cdb_XX_12;
+ T_TASK(cmd)->t_task_lba = transport_lba_32(cdb);
+ T_TASK(cmd)->t_tasks_fua = (cdb[1] & 0x8);
+ cmd->se_cmd_flags |= SCF_SCSI_DATA_SG_IO_CDB;
+ break;
+ case WRITE_16:
+ sectors = transport_get_sectors_16(cdb, cmd, §or_ret);
+ if (sector_ret)
+ goto out_unsupported_cdb;
+ size = transport_get_size(sectors, cdb, cmd);
+ cmd->transport_split_cdb = &split_cdb_XX_16;
+ T_TASK(cmd)->t_task_lba = transport_lba_64(cdb);
+ T_TASK(cmd)->t_tasks_fua = (cdb[1] & 0x8);
+ cmd->se_cmd_flags |= SCF_SCSI_DATA_SG_IO_CDB;
+ break;
+ case XDWRITEREAD_10:
+ if ((cmd->data_direction != DMA_TO_DEVICE) ||
+ !(T_TASK(cmd)->t_tasks_bidi))
+ goto out_invalid_cdb_field;
+ sectors = transport_get_sectors_10(cdb, cmd, §or_ret);
+ if (sector_ret)
+ goto out_unsupported_cdb;
+ size = transport_get_size(sectors, cdb, cmd);
+ cmd->transport_split_cdb = &split_cdb_XX_10;
+ T_TASK(cmd)->t_task_lba = transport_lba_32(cdb);
+ cmd->se_cmd_flags |= SCF_SCSI_DATA_SG_IO_CDB;
+ passthrough = (TRANSPORT(dev)->transport_type ==
+ TRANSPORT_PLUGIN_PHBA_PDEV);
+ /*
+ * Skip the remaining assignments for TCM/PSCSI passthrough
+ */
+ if (passthrough)
+ break;
+ /*
+ * Setup BIDI XOR callback to be run during transport_generic_complete_ok()
+ */
+ cmd->transport_complete_callback = &transport_xor_callback;
+ T_TASK(cmd)->t_tasks_fua = (cdb[1] & 0x8);
+ break;
+ case VARIABLE_LENGTH_CMD:
+ service_action = get_unaligned_be16(&cdb[8]);
+ /*
+ * Determine if this is TCM/PSCSI device and we should disable
+ * internal emulation for this CDB.
+ */
+ passthrough = (TRANSPORT(dev)->transport_type ==
+ TRANSPORT_PLUGIN_PHBA_PDEV);
+
+ switch (service_action) {
+ case XDWRITEREAD_32:
+ sectors = transport_get_sectors_32(cdb, cmd, §or_ret);
+ if (sector_ret)
+ goto out_unsupported_cdb;
+ size = transport_get_size(sectors, cdb, cmd);
+ /*
+ * Use WRITE_32 and READ_32 opcodes for the emulated
+ * XDWRITE_READ_32 logic.
+ */
+ cmd->transport_split_cdb = &split_cdb_XX_32;
+ T_TASK(cmd)->t_task_lba = transport_lba_64_ext(cdb);
+ cmd->se_cmd_flags |= SCF_SCSI_DATA_SG_IO_CDB;
+
+ /*
+ * Skip the remaining assignments for TCM/PSCSI passthrough
+ */
+ if (passthrough)
+ break;
+
+ /*
+ * Setup BIDI XOR callback to be run during
+ * transport_generic_complete_ok()
+ */
+ cmd->transport_complete_callback = &transport_xor_callback;
+ T_TASK(cmd)->t_tasks_fua = (cdb[10] & 0x8);
+ break;
+ case WRITE_SAME_32:
+ sectors = transport_get_sectors_32(cdb, cmd, §or_ret);
+ if (sector_ret)
+ goto out_unsupported_cdb;
+ size = transport_get_size(sectors, cdb, cmd);
+ T_TASK(cmd)->t_task_lba = get_unaligned_be64(&cdb[12]);
+ cmd->se_cmd_flags |= SCF_SCSI_CONTROL_SG_IO_CDB;
+
+ /*
+ * Skip the remaining assignments for TCM/PSCSI passthrough
+ */
+ if (passthrough)
+ break;
+
+ if ((cdb[10] & 0x04) || (cdb[10] & 0x02)) {
+ printk(KERN_ERR "WRITE_SAME PBDATA and LBDATA"
+ " bits not supported for Block Discard"
+ " Emulation\n");
+ goto out_invalid_cdb_field;
+ }
+ /*
+ * Currently for the emulated case we only accept
+ * tpws with the UNMAP=1 bit set.
+ */
+ if (!(cdb[10] & 0x08)) {
+ printk(KERN_ERR "WRITE_SAME w/o UNMAP bit not"
+ " supported for Block Discard Emulation\n");
+ goto out_invalid_cdb_field;
+ }
+ break;
+ default:
+ printk(KERN_ERR "VARIABLE_LENGTH_CMD service action"
+ " 0x%04x not supported\n", service_action);
+ goto out_unsupported_cdb;
+ }
+ break;
+ case 0xa3:
+ if (TRANSPORT(dev)->get_device_type(dev) != TYPE_ROM) {
+ /* MAINTENANCE_IN from SCC-2 */
+ /*
+ * Check for emulated MI_REPORT_TARGET_PGS.
+ */
+ if (cdb[1] == MI_REPORT_TARGET_PGS) {
+ cmd->transport_emulate_cdb =
+ (T10_ALUA(su_dev)->alua_type ==
+ SPC3_ALUA_EMULATED) ?
+ &core_emulate_report_target_port_groups :
+ NULL;
+ }
+ size = (cdb[6] << 24) | (cdb[7] << 16) |
+ (cdb[8] << 8) | cdb[9];
+ } else {
+ /* GPCMD_SEND_KEY from multi media commands */
+ size = (cdb[8] << 8) + cdb[9];
+ }
+ cmd->se_cmd_flags |= SCF_SCSI_CONTROL_NONSG_IO_CDB;
+ break;
+ case MODE_SELECT:
+ size = cdb[4];
+ cmd->se_cmd_flags |= SCF_SCSI_CONTROL_SG_IO_CDB;
+ break;
+ case MODE_SELECT_10:
+ size = (cdb[7] << 8) + cdb[8];
+ cmd->se_cmd_flags |= SCF_SCSI_CONTROL_SG_IO_CDB;
+ break;
+ case MODE_SENSE:
+ size = cdb[4];
+ cmd->se_cmd_flags |= SCF_SCSI_CONTROL_NONSG_IO_CDB;
+ break;
+ case MODE_SENSE_10:
+ case GPCMD_READ_BUFFER_CAPACITY:
+ case GPCMD_SEND_OPC:
+ case LOG_SELECT:
+ case LOG_SENSE:
+ size = (cdb[7] << 8) + cdb[8];
+ cmd->se_cmd_flags |= SCF_SCSI_CONTROL_NONSG_IO_CDB;
+ break;
+ case READ_BLOCK_LIMITS:
+ size = READ_BLOCK_LEN;
+ cmd->se_cmd_flags |= SCF_SCSI_CONTROL_NONSG_IO_CDB;
+ break;
+ case GPCMD_GET_CONFIGURATION:
+ case GPCMD_READ_FORMAT_CAPACITIES:
+ case GPCMD_READ_DISC_INFO:
+ case GPCMD_READ_TRACK_RZONE_INFO:
+ size = (cdb[7] << 8) + cdb[8];
+ cmd->se_cmd_flags |= SCF_SCSI_CONTROL_SG_IO_CDB;
+ break;
+ case PERSISTENT_RESERVE_IN:
+ case PERSISTENT_RESERVE_OUT:
+ cmd->transport_emulate_cdb =
+ (T10_RES(su_dev)->res_type ==
+ SPC3_PERSISTENT_RESERVATIONS) ?
+ &core_scsi3_emulate_pr : NULL;
+ size = (cdb[7] << 8) + cdb[8];
+ cmd->se_cmd_flags |= SCF_SCSI_CONTROL_NONSG_IO_CDB;
+ break;
+ case GPCMD_MECHANISM_STATUS:
+ case GPCMD_READ_DVD_STRUCTURE:
+ size = (cdb[8] << 8) + cdb[9];
+ cmd->se_cmd_flags |= SCF_SCSI_CONTROL_SG_IO_CDB;
+ break;
+ case READ_POSITION:
+ size = READ_POSITION_LEN;
+ cmd->se_cmd_flags |= SCF_SCSI_CONTROL_NONSG_IO_CDB;
+ break;
+ case 0xa4:
+ if (TRANSPORT(dev)->get_device_type(dev) != TYPE_ROM) {
+ /* MAINTENANCE_OUT from SCC-2
+ *
+ * Check for emulated MO_SET_TARGET_PGS.
+ */
+ if (cdb[1] == MO_SET_TARGET_PGS) {
+ cmd->transport_emulate_cdb =
+ (T10_ALUA(su_dev)->alua_type ==
+ SPC3_ALUA_EMULATED) ?
+ &core_emulate_set_target_port_groups :
+ NULL;
+ }
+
+ size = (cdb[6] << 24) | (cdb[7] << 16) |
+ (cdb[8] << 8) | cdb[9];
+ } else {
+ /* GPCMD_REPORT_KEY from multi media commands */
+ size = (cdb[8] << 8) + cdb[9];
+ }
+ cmd->se_cmd_flags |= SCF_SCSI_CONTROL_NONSG_IO_CDB;
+ break;
+ case INQUIRY:
+ size = (cdb[3] << 8) + cdb[4];
+ /*
+ * Do implict HEAD_OF_QUEUE processing for INQUIRY.
+ * See spc4r17 section 5.3
+ */
+ if (SE_DEV(cmd)->dev_task_attr_type == SAM_TASK_ATTR_EMULATED)
+ cmd->sam_task_attr = TASK_ATTR_HOQ;
+ cmd->se_cmd_flags |= SCF_SCSI_CONTROL_NONSG_IO_CDB;
+ break;
+ case READ_BUFFER:
+ size = (cdb[6] << 16) + (cdb[7] << 8) + cdb[8];
+ cmd->se_cmd_flags |= SCF_SCSI_CONTROL_NONSG_IO_CDB;
+ break;
+ case READ_CAPACITY:
+ size = READ_CAP_LEN;
+ cmd->se_cmd_flags |= SCF_SCSI_CONTROL_NONSG_IO_CDB;
+ break;
+ case READ_MEDIA_SERIAL_NUMBER:
+ case SECURITY_PROTOCOL_IN:
+ case SECURITY_PROTOCOL_OUT:
+ size = (cdb[6] << 24) | (cdb[7] << 16) | (cdb[8] << 8) | cdb[9];
+ cmd->se_cmd_flags |= SCF_SCSI_CONTROL_NONSG_IO_CDB;
+ break;
+ case SERVICE_ACTION_IN:
+ case ACCESS_CONTROL_IN:
+ case ACCESS_CONTROL_OUT:
+ case EXTENDED_COPY:
+ case READ_ATTRIBUTE:
+ case RECEIVE_COPY_RESULTS:
+ case WRITE_ATTRIBUTE:
+ size = (cdb[10] << 24) | (cdb[11] << 16) |
+ (cdb[12] << 8) | cdb[13];
+ cmd->se_cmd_flags |= SCF_SCSI_CONTROL_NONSG_IO_CDB;
+ break;
+ case RECEIVE_DIAGNOSTIC:
+ case SEND_DIAGNOSTIC:
+ size = (cdb[3] << 8) | cdb[4];
+ cmd->se_cmd_flags |= SCF_SCSI_CONTROL_NONSG_IO_CDB;
+ break;
+/* #warning FIXME: Figure out correct GPCMD_READ_CD blocksize. */
+#if 0
+ case GPCMD_READ_CD:
+ sectors = (cdb[6] << 16) + (cdb[7] << 8) + cdb[8];
+ size = (2336 * sectors);
+ cmd->se_cmd_flags |= SCF_SCSI_CONTROL_NONSG_IO_CDB;
+ break;
+#endif
+ case READ_TOC:
+ size = cdb[8];
+ cmd->se_cmd_flags |= SCF_SCSI_CONTROL_NONSG_IO_CDB;
+ break;
+ case REQUEST_SENSE:
+ size = cdb[4];
+ cmd->se_cmd_flags |= SCF_SCSI_CONTROL_NONSG_IO_CDB;
+ break;
+ case READ_ELEMENT_STATUS:
+ size = 65536 * cdb[7] + 256 * cdb[8] + cdb[9];
+ cmd->se_cmd_flags |= SCF_SCSI_CONTROL_NONSG_IO_CDB;
+ break;
+ case WRITE_BUFFER:
+ size = (cdb[6] << 16) + (cdb[7] << 8) + cdb[8];
+ cmd->se_cmd_flags |= SCF_SCSI_CONTROL_NONSG_IO_CDB;
+ break;
+ case RESERVE:
+ case RESERVE_10:
+ /*
+ * The SPC-2 RESERVE does not contain a size in the SCSI CDB.
+ * Assume the passthrough or $FABRIC_MOD will tell us about it.
+ */
+ if (cdb[0] == RESERVE_10)
+ size = (cdb[7] << 8) | cdb[8];
+ else
+ size = cmd->data_length;
+
+ /*
+ * Setup the legacy emulated handler for SPC-2 and
+ * >= SPC-3 compatible reservation handling (CRH=1)
+ * Otherwise, we assume the underlying SCSI logic is
+ * is running in SPC_PASSTHROUGH, and wants reservations
+ * emulation disabled.
+ */
+ cmd->transport_emulate_cdb =
+ (T10_RES(su_dev)->res_type !=
+ SPC_PASSTHROUGH) ?
+ &core_scsi2_emulate_crh : NULL;
+ cmd->se_cmd_flags |= SCF_SCSI_NON_DATA_CDB;
+ break;
+ case RELEASE:
+ case RELEASE_10:
+ /*
+ * The SPC-2 RELEASE does not contain a size in the SCSI CDB.
+ * Assume the passthrough or $FABRIC_MOD will tell us about it.
+ */
+ if (cdb[0] == RELEASE_10)
+ size = (cdb[7] << 8) | cdb[8];
+ else
+ size = cmd->data_length;
+
+ cmd->transport_emulate_cdb =
+ (T10_RES(su_dev)->res_type !=
+ SPC_PASSTHROUGH) ?
+ &core_scsi2_emulate_crh : NULL;
+ cmd->se_cmd_flags |= SCF_SCSI_NON_DATA_CDB;
+ break;
+ case SYNCHRONIZE_CACHE:
+ case 0x91: /* SYNCHRONIZE_CACHE_16: */
+ /*
+ * Extract LBA and range to be flushed for emulated SYNCHRONIZE_CACHE
+ */
+ if (cdb[0] == SYNCHRONIZE_CACHE) {
+ sectors = transport_get_sectors_10(cdb, cmd, §or_ret);
+ T_TASK(cmd)->t_task_lba = transport_lba_32(cdb);
+ } else {
+ sectors = transport_get_sectors_16(cdb, cmd, §or_ret);
+ T_TASK(cmd)->t_task_lba = transport_lba_64(cdb);
+ }
+ if (sector_ret)
+ goto out_unsupported_cdb;
+
+ size = transport_get_size(sectors, cdb, cmd);
+ cmd->se_cmd_flags |= SCF_SCSI_NON_DATA_CDB;
+
+ /*
+ * For TCM/pSCSI passthrough, skip cmd->transport_emulate_cdb()
+ */
+ if (TRANSPORT(dev)->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV)
+ break;
+ /*
+ * Set SCF_EMULATE_CDB_ASYNC to ensure asynchronous operation
+ * for SYNCHRONIZE_CACHE* Immed=1 case in __transport_execute_tasks()
+ */
+ cmd->se_cmd_flags |= SCF_EMULATE_CDB_ASYNC;
+ /*
+ * Check to ensure that LBA + Range does not exceed past end of
+ * device.
+ */
+ if (transport_get_sectors(cmd) < 0)
+ goto out_invalid_cdb_field;
+ break;
+ case UNMAP:
+ size = get_unaligned_be16(&cdb[7]);
+ passthrough = (TRANSPORT(dev)->transport_type ==
+ TRANSPORT_PLUGIN_PHBA_PDEV);
+ /*
+ * Determine if the received UNMAP used to for direct passthrough
+ * into Linux/SCSI with struct request via TCM/pSCSI or we are
+ * signaling the use of internal transport_generic_unmap() emulation
+ * for UNMAP -> Linux/BLOCK disbard with TCM/IBLOCK and TCM/FILEIO
+ * subsystem plugin backstores.
+ */
+ if (!(passthrough))
+ cmd->se_cmd_flags |= SCF_EMULATE_SYNC_UNMAP;
+
+ cmd->se_cmd_flags |= SCF_SCSI_CONTROL_NONSG_IO_CDB;
+ break;
+ case WRITE_SAME_16:
+ sectors = transport_get_sectors_16(cdb, cmd, §or_ret);
+ if (sector_ret)
+ goto out_unsupported_cdb;
+ size = transport_get_size(sectors, cdb, cmd);
+ T_TASK(cmd)->t_task_lba = get_unaligned_be16(&cdb[2]);
+ passthrough = (TRANSPORT(dev)->transport_type ==
+ TRANSPORT_PLUGIN_PHBA_PDEV);
+ /*
+ * Determine if the received WRITE_SAME_16 is used to for direct
+ * passthrough into Linux/SCSI with struct request via TCM/pSCSI
+ * or we are signaling the use of internal WRITE_SAME + UNMAP=1
+ * emulation for -> Linux/BLOCK disbard with TCM/IBLOCK and
+ * TCM/FILEIO subsystem plugin backstores.
+ */
+ if (!(passthrough)) {
+ if ((cdb[1] & 0x04) || (cdb[1] & 0x02)) {
+ printk(KERN_ERR "WRITE_SAME PBDATA and LBDATA"
+ " bits not supported for Block Discard"
+ " Emulation\n");
+ goto out_invalid_cdb_field;
+ }
+ /*
+ * Currently for the emulated case we only accept
+ * tpws with the UNMAP=1 bit set.
+ */
+ if (!(cdb[1] & 0x08)) {
+ printk(KERN_ERR "WRITE_SAME w/o UNMAP bit not "
+ " supported for Block Discard Emulation\n");
+ goto out_invalid_cdb_field;
+ }
+ }
+ cmd->se_cmd_flags |= SCF_SCSI_CONTROL_SG_IO_CDB;
+ break;
+ case ALLOW_MEDIUM_REMOVAL:
+ case GPCMD_CLOSE_TRACK:
+ case ERASE:
+ case INITIALIZE_ELEMENT_STATUS:
+ case GPCMD_LOAD_UNLOAD:
+ case REZERO_UNIT:
+ case SEEK_10:
+ case GPCMD_SET_SPEED:
+ case SPACE:
+ case START_STOP:
+ case TEST_UNIT_READY:
+ case VERIFY:
+ case WRITE_FILEMARKS:
+ case MOVE_MEDIUM:
+ cmd->se_cmd_flags |= SCF_SCSI_NON_DATA_CDB;
+ break;
+ case REPORT_LUNS:
+ cmd->transport_emulate_cdb =
+ &transport_core_report_lun_response;
+ size = (cdb[6] << 24) | (cdb[7] << 16) | (cdb[8] << 8) | cdb[9];
+ /*
+ * Do implict HEAD_OF_QUEUE processing for REPORT_LUNS
+ * See spc4r17 section 5.3
+ */
+ if (SE_DEV(cmd)->dev_task_attr_type == SAM_TASK_ATTR_EMULATED)
+ cmd->sam_task_attr = TASK_ATTR_HOQ;
+ cmd->se_cmd_flags |= SCF_SCSI_CONTROL_NONSG_IO_CDB;
+ break;
+ default:
+ printk(KERN_WARNING "TARGET_CORE[%s]: Unsupported SCSI Opcode"
+ " 0x%02x, sending CHECK_CONDITION.\n",
+ CMD_TFO(cmd)->get_fabric_name(), cdb[0]);
+ cmd->transport_wait_for_tasks = &transport_nop_wait_for_tasks;
+ goto out_unsupported_cdb;
+ }
+
+ if (size != cmd->data_length) {
+ printk(KERN_WARNING "TARGET_CORE[%s]: Expected Transfer Length:"
+ " %u does not match SCSI CDB Length: %u for SAM Opcode:"
+ " 0x%02x\n", CMD_TFO(cmd)->get_fabric_name(),
+ cmd->data_length, size, cdb[0]);
+
+ cmd->cmd_spdtl = size;
+
+ if (cmd->data_direction == DMA_TO_DEVICE) {
+ printk(KERN_ERR "Rejecting underflow/overflow"
+ " WRITE data\n");
+ goto out_invalid_cdb_field;
+ }
+ /*
+ * Reject READ_* or WRITE_* with overflow/underflow for
+ * type SCF_SCSI_DATA_SG_IO_CDB.
+ */
+ if (!(ret) && (DEV_ATTRIB(dev)->block_size != 512)) {
+ printk(KERN_ERR "Failing OVERFLOW/UNDERFLOW for LBA op"
+ " CDB on non 512-byte sector setup subsystem"
+ " plugin: %s\n", TRANSPORT(dev)->name);
+ /* Returns CHECK_CONDITION + INVALID_CDB_FIELD */
+ goto out_invalid_cdb_field;
+ }
+
+ if (size > cmd->data_length) {
+ cmd->se_cmd_flags |= SCF_OVERFLOW_BIT;
+ cmd->residual_count = (size - cmd->data_length);
+ } else {
+ cmd->se_cmd_flags |= SCF_UNDERFLOW_BIT;
+ cmd->residual_count = (cmd->data_length - size);
+ }
+ cmd->data_length = size;
+ }
+
+ transport_set_supported_SAM_opcode(cmd);
+ return ret;
+
+out_unsupported_cdb:
+ cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION;
+ cmd->scsi_sense_reason = TCM_UNSUPPORTED_SCSI_OPCODE;
+ return -2;
+out_invalid_cdb_field:
+ cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION;
+ cmd->scsi_sense_reason = TCM_INVALID_CDB_FIELD;
+ return -2;
+}
+
+static inline void transport_release_tasks(struct se_cmd *);
+
+/*
+ * This function will copy a contiguous *src buffer into a destination
+ * struct scatterlist array.
+ */
+static void transport_memcpy_write_contig(
+ struct se_cmd *cmd,
+ struct scatterlist *sg_d,
+ unsigned char *src)
+{
+ u32 i = 0, length = 0, total_length = cmd->data_length;
+ void *dst;
+
+ while (total_length) {
+ length = sg_d[i].length;
+
+ if (length > total_length)
+ length = total_length;
+
+ dst = sg_virt(&sg_d[i]);
+
+ memcpy(dst, src, length);
+
+ if (!(total_length -= length))
+ return;
+
+ src += length;
+ i++;
+ }
+}
+
+/*
+ * This function will copy a struct scatterlist array *sg_s into a destination
+ * contiguous *dst buffer.
+ */
+static void transport_memcpy_read_contig(
+ struct se_cmd *cmd,
+ unsigned char *dst,
+ struct scatterlist *sg_s)
+{
+ u32 i = 0, length = 0, total_length = cmd->data_length;
+ void *src;
+
+ while (total_length) {
+ length = sg_s[i].length;
+
+ if (length > total_length)
+ length = total_length;
+
+ src = sg_virt(&sg_s[i]);
+
+ memcpy(dst, src, length);
+
+ if (!(total_length -= length))
+ return;
+
+ dst += length;
+ i++;
+ }
+}
+
+static void transport_memcpy_se_mem_read_contig(
+ struct se_cmd *cmd,
+ unsigned char *dst,
+ struct list_head *se_mem_list)
+{
+ struct se_mem *se_mem;
+ void *src;
+ u32 length = 0, total_length = cmd->data_length;
+
+ list_for_each_entry(se_mem, se_mem_list, se_list) {
+ length = se_mem->se_len;
+
+ if (length > total_length)
+ length = total_length;
+
+ src = page_address(se_mem->se_page) + se_mem->se_off;
+
+ memcpy(dst, src, length);
+
+ if (!(total_length -= length))
+ return;
+
+ dst += length;
+ }
+}
+
+/*
+ * Called from transport_generic_complete_ok() and
+ * transport_generic_request_failure() to determine which dormant/delayed
+ * and ordered cmds need to have their tasks added to the execution queue.
+ */
+static void transport_complete_task_attr(struct se_cmd *cmd)
+{
+ struct se_device *dev = SE_DEV(cmd);
+ struct se_cmd *cmd_p, *cmd_tmp;
+ int new_active_tasks = 0;
+
+ if (cmd->sam_task_attr == TASK_ATTR_SIMPLE) {
+ atomic_dec(&dev->simple_cmds);
+ smp_mb__after_atomic_dec();
+ dev->dev_cur_ordered_id++;
+ DEBUG_STA("Incremented dev->dev_cur_ordered_id: %u for"
+ " SIMPLE: %u\n", dev->dev_cur_ordered_id,
+ cmd->se_ordered_id);
+ } else if (cmd->sam_task_attr == TASK_ATTR_HOQ) {
+ atomic_dec(&dev->dev_hoq_count);
+ smp_mb__after_atomic_dec();
+ dev->dev_cur_ordered_id++;
+ DEBUG_STA("Incremented dev_cur_ordered_id: %u for"
+ " HEAD_OF_QUEUE: %u\n", dev->dev_cur_ordered_id,
+ cmd->se_ordered_id);
+ } else if (cmd->sam_task_attr == TASK_ATTR_ORDERED) {
+ spin_lock(&dev->ordered_cmd_lock);
+ list_del(&cmd->se_ordered_list);
+ atomic_dec(&dev->dev_ordered_sync);
+ smp_mb__after_atomic_dec();
+ spin_unlock(&dev->ordered_cmd_lock);
+
+ dev->dev_cur_ordered_id++;
+ DEBUG_STA("Incremented dev_cur_ordered_id: %u for ORDERED:"
+ " %u\n", dev->dev_cur_ordered_id, cmd->se_ordered_id);
+ }
+ /*
+ * Process all commands up to the last received
+ * ORDERED task attribute which requires another blocking
+ * boundary
+ */
+ spin_lock(&dev->delayed_cmd_lock);
+ list_for_each_entry_safe(cmd_p, cmd_tmp,
+ &dev->delayed_cmd_list, se_delayed_list) {
+
+ list_del(&cmd_p->se_delayed_list);
+ spin_unlock(&dev->delayed_cmd_lock);
+
+ DEBUG_STA("Calling add_tasks() for"
+ " cmd_p: 0x%02x Task Attr: 0x%02x"
+ " Dormant -> Active, se_ordered_id: %u\n",
+ T_TASK(cmd_p)->t_task_cdb[0],
+ cmd_p->sam_task_attr, cmd_p->se_ordered_id);
+
+ transport_add_tasks_from_cmd(cmd_p);
+ new_active_tasks++;
+
+ spin_lock(&dev->delayed_cmd_lock);
+ if (cmd_p->sam_task_attr == TASK_ATTR_ORDERED)
+ break;
+ }
+ spin_unlock(&dev->delayed_cmd_lock);
+ /*
+ * If new tasks have become active, wake up the transport thread
+ * to do the processing of the Active tasks.
+ */
+ if (new_active_tasks != 0)
+ wake_up_interruptible(&dev->dev_queue_obj->thread_wq);
+}
+
+static void transport_generic_complete_ok(struct se_cmd *cmd)
+{
+ int reason = 0;
+ /*
+ * Check if we need to move delayed/dormant tasks from cmds on the
+ * delayed execution list after a HEAD_OF_QUEUE or ORDERED Task
+ * Attribute.
+ */
+ if (SE_DEV(cmd)->dev_task_attr_type == SAM_TASK_ATTR_EMULATED)
+ transport_complete_task_attr(cmd);
+ /*
+ * Check if we need to retrieve a sense buffer from
+ * the struct se_cmd in question.
+ */
+ if (cmd->se_cmd_flags & SCF_TRANSPORT_TASK_SENSE) {
+ if (transport_get_sense_data(cmd) < 0)
+ reason = TCM_NON_EXISTENT_LUN;
+
+ /*
+ * Only set when an struct se_task->task_scsi_status returned
+ * a non GOOD status.
+ */
+ if (cmd->scsi_status) {
+ transport_send_check_condition_and_sense(
+ cmd, reason, 1);
+ transport_lun_remove_cmd(cmd);
+ transport_cmd_check_stop_to_fabric(cmd);
+ return;
+ }
+ }
+ /*
+ * Check for a callback, used by amoungst other things
+ * XDWRITE_READ_10 emulation.
+ */
+ if (cmd->transport_complete_callback)
+ cmd->transport_complete_callback(cmd);
+
+ switch (cmd->data_direction) {
+ case DMA_FROM_DEVICE:
+ spin_lock(&cmd->se_lun->lun_sep_lock);
+ if (SE_LUN(cmd)->lun_sep) {
+ SE_LUN(cmd)->lun_sep->sep_stats.tx_data_octets +=
+ cmd->data_length;
+ }
+ spin_unlock(&cmd->se_lun->lun_sep_lock);
+ /*
+ * If enabled by TCM fabirc module pre-registered SGL
+ * memory, perform the memcpy() from the TCM internal
+ * contigious buffer back to the original SGL.
+ */
+ if (cmd->se_cmd_flags & SCF_PASSTHROUGH_CONTIG_TO_SG)
+ transport_memcpy_write_contig(cmd,
+ T_TASK(cmd)->t_task_pt_sgl,
+ T_TASK(cmd)->t_task_buf);
+
+ CMD_TFO(cmd)->queue_data_in(cmd);
+ break;
+ case DMA_TO_DEVICE:
+ spin_lock(&cmd->se_lun->lun_sep_lock);
+ if (SE_LUN(cmd)->lun_sep) {
+ SE_LUN(cmd)->lun_sep->sep_stats.rx_data_octets +=
+ cmd->data_length;
+ }
+ spin_unlock(&cmd->se_lun->lun_sep_lock);
+ /*
+ * Check if we need to send READ payload for BIDI-COMMAND
+ */
+ if (T_TASK(cmd)->t_mem_bidi_list != NULL) {
+ spin_lock(&cmd->se_lun->lun_sep_lock);
+ if (SE_LUN(cmd)->lun_sep) {
+ SE_LUN(cmd)->lun_sep->sep_stats.tx_data_octets +=
+ cmd->data_length;
+ }
+ spin_unlock(&cmd->se_lun->lun_sep_lock);
+ CMD_TFO(cmd)->queue_data_in(cmd);
+ break;
+ }
+ /* Fall through for DMA_TO_DEVICE */
+ case DMA_NONE:
+ CMD_TFO(cmd)->queue_status(cmd);
+ break;
+ default:
+ break;
+ }
+
+ transport_lun_remove_cmd(cmd);
+ transport_cmd_check_stop_to_fabric(cmd);
+}
+
+static void transport_free_dev_tasks(struct se_cmd *cmd)
+{
+ struct se_task *task, *task_tmp;
+ unsigned long flags;
+
+ spin_lock_irqsave(&T_TASK(cmd)->t_state_lock, flags);
+ list_for_each_entry_safe(task, task_tmp,
+ &T_TASK(cmd)->t_task_list, t_list) {
+ if (atomic_read(&task->task_active))
+ continue;
+
+ kfree(task->task_sg_bidi);
+ kfree(task->task_sg);
+
+ list_del(&task->t_list);
+
+ spin_unlock_irqrestore(&T_TASK(cmd)->t_state_lock, flags);
+ if (task->se_dev)
+ TRANSPORT(task->se_dev)->free_task(task);
+ else
+ printk(KERN_ERR "task[%u] - task->se_dev is NULL\n",
+ task->task_no);
+ spin_lock_irqsave(&T_TASK(cmd)->t_state_lock, flags);
+ }
+ spin_unlock_irqrestore(&T_TASK(cmd)->t_state_lock, flags);
+}
+
+static inline void transport_free_pages(struct se_cmd *cmd)
+{
+ struct se_mem *se_mem, *se_mem_tmp;
+ int free_page = 1;
+
+ if (cmd->se_cmd_flags & SCF_PASSTHROUGH_SG_TO_MEM_NOALLOC)
+ free_page = 0;
+ if (cmd->se_dev->transport->do_se_mem_map)
+ free_page = 0;
+
+ if (T_TASK(cmd)->t_task_buf) {
+ kfree(T_TASK(cmd)->t_task_buf);
+ T_TASK(cmd)->t_task_buf = NULL;
+ return;
+ }
+
+ /*
+ * Caller will handle releasing of struct se_mem.
+ */
+ if (cmd->se_cmd_flags & SCF_CMD_PASSTHROUGH_NOALLOC)
+ return;
+
+ if (!(T_TASK(cmd)->t_tasks_se_num))
+ return;
+
+ list_for_each_entry_safe(se_mem, se_mem_tmp,
+ T_TASK(cmd)->t_mem_list, se_list) {
+ /*
+ * We only release call __free_page(struct se_mem->se_page) when
+ * SCF_PASSTHROUGH_SG_TO_MEM_NOALLOC is NOT in use,
+ */
+ if (free_page)
+ __free_page(se_mem->se_page);
+
+ list_del(&se_mem->se_list);
+ kmem_cache_free(se_mem_cache, se_mem);
+ }
+
+ if (T_TASK(cmd)->t_mem_bidi_list && T_TASK(cmd)->t_tasks_se_bidi_num) {
+ list_for_each_entry_safe(se_mem, se_mem_tmp,
+ T_TASK(cmd)->t_mem_bidi_list, se_list) {
+ /*
+ * We only release call __free_page(struct se_mem->se_page) when
+ * SCF_PASSTHROUGH_SG_TO_MEM_NOALLOC is NOT in use,
+ */
+ if (free_page)
+ __free_page(se_mem->se_page);
+
+ list_del(&se_mem->se_list);
+ kmem_cache_free(se_mem_cache, se_mem);
+ }
+ }
+
+ kfree(T_TASK(cmd)->t_mem_bidi_list);
+ T_TASK(cmd)->t_mem_bidi_list = NULL;
+ kfree(T_TASK(cmd)->t_mem_list);
+ T_TASK(cmd)->t_mem_list = NULL;
+ T_TASK(cmd)->t_tasks_se_num = 0;
+}
+
+static inline void transport_release_tasks(struct se_cmd *cmd)
+{
+ transport_free_dev_tasks(cmd);
+}
+
+static inline int transport_dec_and_check(struct se_cmd *cmd)
+{
+ unsigned long flags;
+
+ spin_lock_irqsave(&T_TASK(cmd)->t_state_lock, flags);
+ if (atomic_read(&T_TASK(cmd)->t_fe_count)) {
+ if (!(atomic_dec_and_test(&T_TASK(cmd)->t_fe_count))) {
+ spin_unlock_irqrestore(&T_TASK(cmd)->t_state_lock,
+ flags);
+ return 1;
+ }
+ }
+
+ if (atomic_read(&T_TASK(cmd)->t_se_count)) {
+ if (!(atomic_dec_and_test(&T_TASK(cmd)->t_se_count))) {
+ spin_unlock_irqrestore(&T_TASK(cmd)->t_state_lock,
+ flags);
+ return 1;
+ }
+ }
+ spin_unlock_irqrestore(&T_TASK(cmd)->t_state_lock, flags);
+
+ return 0;
+}
+
+static void transport_release_fe_cmd(struct se_cmd *cmd)
+{
+ unsigned long flags;
+
+ if (transport_dec_and_check(cmd))
+ return;
+
+ spin_lock_irqsave(&T_TASK(cmd)->t_state_lock, flags);
+ if (!(atomic_read(&T_TASK(cmd)->transport_dev_active))) {
+ spin_unlock_irqrestore(&T_TASK(cmd)->t_state_lock, flags);
+ goto free_pages;
+ }
+ atomic_set(&T_TASK(cmd)->transport_dev_active, 0);
+ transport_all_task_dev_remove_state(cmd);
+ spin_unlock_irqrestore(&T_TASK(cmd)->t_state_lock, flags);
+
+ transport_release_tasks(cmd);
+free_pages:
+ transport_free_pages(cmd);
+ transport_free_se_cmd(cmd);
+ CMD_TFO(cmd)->release_cmd_direct(cmd);
+}
+
+static int transport_generic_remove(
+ struct se_cmd *cmd,
+ int release_to_pool,
+ int session_reinstatement)
+{
+ unsigned long flags;
+
+ if (!(T_TASK(cmd)))
+ goto release_cmd;
+
+ if (transport_dec_and_check(cmd)) {
+ if (session_reinstatement) {
+ spin_lock_irqsave(&T_TASK(cmd)->t_state_lock, flags);
+ transport_all_task_dev_remove_state(cmd);
+ spin_unlock_irqrestore(&T_TASK(cmd)->t_state_lock,
+ flags);
+ }
+ return 1;
+ }
+
+ spin_lock_irqsave(&T_TASK(cmd)->t_state_lock, flags);
+ if (!(atomic_read(&T_TASK(cmd)->transport_dev_active))) {
+ spin_unlock_irqrestore(&T_TASK(cmd)->t_state_lock, flags);
+ goto free_pages;
+ }
+ atomic_set(&T_TASK(cmd)->transport_dev_active, 0);
+ transport_all_task_dev_remove_state(cmd);
+ spin_unlock_irqrestore(&T_TASK(cmd)->t_state_lock, flags);
+
+ transport_release_tasks(cmd);
+free_pages:
+ transport_free_pages(cmd);
+
+release_cmd:
+ if (release_to_pool) {
+ transport_release_cmd_to_pool(cmd);
+ } else {
+ transport_free_se_cmd(cmd);
+ CMD_TFO(cmd)->release_cmd_direct(cmd);
+ }
+
+ return 0;
+}
+
+/*
+ * transport_generic_map_mem_to_cmd - Perform SGL -> struct se_mem map
+ * @cmd: Associated se_cmd descriptor
+ * @mem: SGL style memory for TCM WRITE / READ
+ * @sg_mem_num: Number of SGL elements
+ * @mem_bidi_in: SGL style memory for TCM BIDI READ
+ * @sg_mem_bidi_num: Number of BIDI READ SGL elements
+ *
+ * Return: nonzero return cmd was rejected for -ENOMEM or inproper usage
+ * of parameters.
+ */
+int transport_generic_map_mem_to_cmd(
+ struct se_cmd *cmd,
+ struct scatterlist *mem,
+ u32 sg_mem_num,
+ struct scatterlist *mem_bidi_in,
+ u32 sg_mem_bidi_num)
+{
+ u32 se_mem_cnt_out = 0;
+ int ret;
+
+ if (!(mem) || !(sg_mem_num))
+ return 0;
+ /*
+ * Passed *mem will contain a list_head containing preformatted
+ * struct se_mem elements...
+ */
+ if (!(cmd->se_cmd_flags & SCF_PASSTHROUGH_SG_TO_MEM)) {
+ if ((mem_bidi_in) || (sg_mem_bidi_num)) {
+ printk(KERN_ERR "SCF_CMD_PASSTHROUGH_NOALLOC not supported"
+ " with BIDI-COMMAND\n");
+ return -ENOSYS;
+ }
+
+ T_TASK(cmd)->t_mem_list = (struct list_head *)mem;
+ T_TASK(cmd)->t_tasks_se_num = sg_mem_num;
+ cmd->se_cmd_flags |= SCF_CMD_PASSTHROUGH_NOALLOC;
+ return 0;
+ }
+ /*
+ * Otherwise, assume the caller is passing a struct scatterlist
+ * array from include/linux/scatterlist.h
+ */
+ if ((cmd->se_cmd_flags & SCF_SCSI_DATA_SG_IO_CDB) ||
+ (cmd->se_cmd_flags & SCF_SCSI_CONTROL_SG_IO_CDB)) {
+ /*
+ * For CDB using TCM struct se_mem linked list scatterlist memory
+ * processed into a TCM struct se_subsystem_dev, we do the mapping
+ * from the passed physical memory to struct se_mem->se_page here.
+ */
+ T_TASK(cmd)->t_mem_list = transport_init_se_mem_list();
+ if (!(T_TASK(cmd)->t_mem_list))
+ return -ENOMEM;
+
+ ret = transport_map_sg_to_mem(cmd,
+ T_TASK(cmd)->t_mem_list, mem, &se_mem_cnt_out);
+ if (ret < 0)
+ return -ENOMEM;
+
+ T_TASK(cmd)->t_tasks_se_num = se_mem_cnt_out;
+ /*
+ * Setup BIDI READ list of struct se_mem elements
+ */
+ if ((mem_bidi_in) && (sg_mem_bidi_num)) {
+ T_TASK(cmd)->t_mem_bidi_list = transport_init_se_mem_list();
+ if (!(T_TASK(cmd)->t_mem_bidi_list)) {
+ kfree(T_TASK(cmd)->t_mem_list);
+ return -ENOMEM;
+ }
+ se_mem_cnt_out = 0;
+
+ ret = transport_map_sg_to_mem(cmd,
+ T_TASK(cmd)->t_mem_bidi_list, mem_bidi_in,
+ &se_mem_cnt_out);
+ if (ret < 0) {
+ kfree(T_TASK(cmd)->t_mem_list);
+ return -ENOMEM;
+ }
+
+ T_TASK(cmd)->t_tasks_se_bidi_num = se_mem_cnt_out;
+ }
+ cmd->se_cmd_flags |= SCF_PASSTHROUGH_SG_TO_MEM_NOALLOC;
+
+ } else if (cmd->se_cmd_flags & SCF_SCSI_CONTROL_NONSG_IO_CDB) {
+ if (mem_bidi_in || sg_mem_bidi_num) {
+ printk(KERN_ERR "BIDI-Commands not supported using "
+ "SCF_SCSI_CONTROL_NONSG_IO_CDB\n");
+ return -ENOSYS;
+ }
+ /*
+ * For incoming CDBs using a contiguous buffer internall with TCM,
+ * save the passed struct scatterlist memory. After TCM storage object
+ * processing has completed for this struct se_cmd, TCM core will call
+ * transport_memcpy_[write,read]_contig() as necessary from
+ * transport_generic_complete_ok() and transport_write_pending() in order
+ * to copy the TCM buffer to/from the original passed *mem in SGL ->
+ * struct scatterlist format.
+ */
+ cmd->se_cmd_flags |= SCF_PASSTHROUGH_CONTIG_TO_SG;
+ T_TASK(cmd)->t_task_pt_sgl = mem;
+ }
+
+ return 0;
+}
+EXPORT_SYMBOL(transport_generic_map_mem_to_cmd);
+
+
+static inline long long transport_dev_end_lba(struct se_device *dev)
+{
+ return dev->transport->get_blocks(dev) + 1;
+}
+
+static int transport_get_sectors(struct se_cmd *cmd)
+{
+ struct se_device *dev = SE_DEV(cmd);
+
+ T_TASK(cmd)->t_tasks_sectors =
+ (cmd->data_length / DEV_ATTRIB(dev)->block_size);
+ if (!(T_TASK(cmd)->t_tasks_sectors))
+ T_TASK(cmd)->t_tasks_sectors = 1;
+
+ if (TRANSPORT(dev)->get_device_type(dev) != TYPE_DISK)
+ return 0;
+
+ if ((T_TASK(cmd)->t_task_lba + T_TASK(cmd)->t_tasks_sectors) >
+ transport_dev_end_lba(dev)) {
+ printk(KERN_ERR "LBA: %llu Sectors: %u exceeds"
+ " transport_dev_end_lba(): %llu\n",
+ T_TASK(cmd)->t_task_lba, T_TASK(cmd)->t_tasks_sectors,
+ transport_dev_end_lba(dev));
+ cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION;
+ cmd->scsi_sense_reason = TCM_SECTOR_COUNT_TOO_MANY;
+ return PYX_TRANSPORT_REQ_TOO_MANY_SECTORS;
+ }
+
+ return 0;
+}
+
+static int transport_new_cmd_obj(struct se_cmd *cmd)
+{
+ struct se_device *dev = SE_DEV(cmd);
+ u32 task_cdbs = 0, rc;
+
+ if (!(cmd->se_cmd_flags & SCF_SCSI_DATA_SG_IO_CDB)) {
+ task_cdbs++;
+ T_TASK(cmd)->t_task_cdbs++;
+ } else {
+ int set_counts = 1;
+
+ /*
+ * Setup any BIDI READ tasks and memory from
+ * T_TASK(cmd)->t_mem_bidi_list so the READ struct se_tasks
+ * are queued first for the non pSCSI passthrough case.
+ */
+ if ((T_TASK(cmd)->t_mem_bidi_list != NULL) &&
+ (TRANSPORT(dev)->transport_type != TRANSPORT_PLUGIN_PHBA_PDEV)) {
+ rc = transport_generic_get_cdb_count(cmd,
+ T_TASK(cmd)->t_task_lba,
+ T_TASK(cmd)->t_tasks_sectors,
+ DMA_FROM_DEVICE, T_TASK(cmd)->t_mem_bidi_list,
+ set_counts);
+ if (!(rc)) {
+ cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION;
+ cmd->scsi_sense_reason =
+ TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE;
+ return PYX_TRANSPORT_LU_COMM_FAILURE;
+ }
+ set_counts = 0;
+ }
+ /*
+ * Setup the tasks and memory from T_TASK(cmd)->t_mem_list
+ * Note for BIDI transfers this will contain the WRITE payload
+ */
+ task_cdbs = transport_generic_get_cdb_count(cmd,
+ T_TASK(cmd)->t_task_lba,
+ T_TASK(cmd)->t_tasks_sectors,
+ cmd->data_direction, T_TASK(cmd)->t_mem_list,
+ set_counts);
+ if (!(task_cdbs)) {
+ cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION;
+ cmd->scsi_sense_reason =
+ TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE;
+ return PYX_TRANSPORT_LU_COMM_FAILURE;
+ }
+ T_TASK(cmd)->t_task_cdbs += task_cdbs;
+
+#if 0
+ printk(KERN_INFO "data_length: %u, LBA: %llu t_tasks_sectors:"
+ " %u, t_task_cdbs: %u\n", obj_ptr, cmd->data_length,
+ T_TASK(cmd)->t_task_lba, T_TASK(cmd)->t_tasks_sectors,
+ T_TASK(cmd)->t_task_cdbs);
+#endif
+ }
+
+ atomic_set(&T_TASK(cmd)->t_task_cdbs_left, task_cdbs);
+ atomic_set(&T_TASK(cmd)->t_task_cdbs_ex_left, task_cdbs);
+ atomic_set(&T_TASK(cmd)->t_task_cdbs_timeout_left, task_cdbs);
+ return 0;
+}
+
+static struct list_head *transport_init_se_mem_list(void)
+{
+ struct list_head *se_mem_list;
+
+ se_mem_list = kzalloc(sizeof(struct list_head), GFP_KERNEL);
+ if (!(se_mem_list)) {
+ printk(KERN_ERR "Unable to allocate memory for se_mem_list\n");
+ return NULL;
+ }
+ INIT_LIST_HEAD(se_mem_list);
+
+ return se_mem_list;
+}
+
+static int
+transport_generic_get_mem(struct se_cmd *cmd, u32 length, u32 dma_size)
+{
+ unsigned char *buf;
+ struct se_mem *se_mem;
+
+ T_TASK(cmd)->t_mem_list = transport_init_se_mem_list();
+ if (!(T_TASK(cmd)->t_mem_list))
+ return -ENOMEM;
+
+ /*
+ * If the device uses memory mapping this is enough.
+ */
+ if (cmd->se_dev->transport->do_se_mem_map)
+ return 0;
+
+ /*
+ * Setup BIDI-COMMAND READ list of struct se_mem elements
+ */
+ if (T_TASK(cmd)->t_tasks_bidi) {
+ T_TASK(cmd)->t_mem_bidi_list = transport_init_se_mem_list();
+ if (!(T_TASK(cmd)->t_mem_bidi_list)) {
+ kfree(T_TASK(cmd)->t_mem_list);
+ return -ENOMEM;
+ }
+ }
+
+ while (length) {
+ se_mem = kmem_cache_zalloc(se_mem_cache, GFP_KERNEL);
+ if (!(se_mem)) {
+ printk(KERN_ERR "Unable to allocate struct se_mem\n");
+ goto out;
+ }
+ INIT_LIST_HEAD(&se_mem->se_list);
+ se_mem->se_len = (length > dma_size) ? dma_size : length;
+
+/* #warning FIXME Allocate contigous pages for struct se_mem elements */
+ se_mem->se_page = (struct page *) alloc_pages(GFP_KERNEL, 0);
+ if (!(se_mem->se_page)) {
+ printk(KERN_ERR "alloc_pages() failed\n");
+ goto out;
+ }
+
+ buf = kmap_atomic(se_mem->se_page, KM_IRQ0);
+ if (!(buf)) {
+ printk(KERN_ERR "kmap_atomic() failed\n");
+ goto out;
+ }
+ memset(buf, 0, se_mem->se_len);
+ kunmap_atomic(buf, KM_IRQ0);
+
+ list_add_tail(&se_mem->se_list, T_TASK(cmd)->t_mem_list);
+ T_TASK(cmd)->t_tasks_se_num++;
+
+ DEBUG_MEM("Allocated struct se_mem page(%p) Length(%u)"
+ " Offset(%u)\n", se_mem->se_page, se_mem->se_len,
+ se_mem->se_off);
+
+ length -= se_mem->se_len;
+ }
+
+ DEBUG_MEM("Allocated total struct se_mem elements(%u)\n",
+ T_TASK(cmd)->t_tasks_se_num);
+
+ return 0;
+out:
+ return -1;
+}
+
+extern u32 transport_calc_sg_num(
+ struct se_task *task,
+ struct se_mem *in_se_mem,
+ u32 task_offset)
+{
+ struct se_cmd *se_cmd = task->task_se_cmd;
+ struct se_device *se_dev = SE_DEV(se_cmd);
+ struct se_mem *se_mem = in_se_mem;
+ struct target_core_fabric_ops *tfo = CMD_TFO(se_cmd);
+ u32 sg_length, task_size = task->task_size, task_sg_num_padded;
+
+ while (task_size != 0) {
+ DEBUG_SC("se_mem->se_page(%p) se_mem->se_len(%u)"
+ " se_mem->se_off(%u) task_offset(%u)\n",
+ se_mem->se_page, se_mem->se_len,
+ se_mem->se_off, task_offset);
+
+ if (task_offset == 0) {
+ if (task_size >= se_mem->se_len) {
+ sg_length = se_mem->se_len;
+
+ if (!(list_is_last(&se_mem->se_list,
+ T_TASK(se_cmd)->t_mem_list)))
+ se_mem = list_entry(se_mem->se_list.next,
+ struct se_mem, se_list);
+ } else {
+ sg_length = task_size;
+ task_size -= sg_length;
+ goto next;
+ }
+
+ DEBUG_SC("sg_length(%u) task_size(%u)\n",
+ sg_length, task_size);
+ } else {
+ if ((se_mem->se_len - task_offset) > task_size) {
+ sg_length = task_size;
+ task_size -= sg_length;
+ goto next;
+ } else {
+ sg_length = (se_mem->se_len - task_offset);
+
+ if (!(list_is_last(&se_mem->se_list,
+ T_TASK(se_cmd)->t_mem_list)))
+ se_mem = list_entry(se_mem->se_list.next,
+ struct se_mem, se_list);
+ }
+
+ DEBUG_SC("sg_length(%u) task_size(%u)\n",
+ sg_length, task_size);
+
+ task_offset = 0;
+ }
+ task_size -= sg_length;
+next:
+ DEBUG_SC("task[%u] - Reducing task_size to(%u)\n",
+ task->task_no, task_size);
+
+ task->task_sg_num++;
+ }
+ /*
+ * Check if the fabric module driver is requesting that all
+ * struct se_task->task_sg[] be chained together.. If so,
+ * then allocate an extra padding SG entry for linking and
+ * marking the end of the chained SGL.
+ */
+ if (tfo->task_sg_chaining) {
+ task_sg_num_padded = (task->task_sg_num + 1);
+ task->task_padded_sg = 1;
+ } else
+ task_sg_num_padded = task->task_sg_num;
+
+ task->task_sg = kzalloc(task_sg_num_padded *
+ sizeof(struct scatterlist), GFP_KERNEL);
+ if (!(task->task_sg)) {
+ printk(KERN_ERR "Unable to allocate memory for"
+ " task->task_sg\n");
+ return 0;
+ }
+ sg_init_table(&task->task_sg[0], task_sg_num_padded);
+ /*
+ * Setup task->task_sg_bidi for SCSI READ payload for
+ * TCM/pSCSI passthrough if present for BIDI-COMMAND
+ */
+ if ((T_TASK(se_cmd)->t_mem_bidi_list != NULL) &&
+ (TRANSPORT(se_dev)->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV)) {
+ task->task_sg_bidi = kzalloc(task_sg_num_padded *
+ sizeof(struct scatterlist), GFP_KERNEL);
+ if (!(task->task_sg_bidi)) {
+ printk(KERN_ERR "Unable to allocate memory for"
+ " task->task_sg_bidi\n");
+ return 0;
+ }
+ sg_init_table(&task->task_sg_bidi[0], task_sg_num_padded);
+ }
+ /*
+ * For the chaining case, setup the proper end of SGL for the
+ * initial submission struct task into struct se_subsystem_api.
+ * This will be cleared later by transport_do_task_sg_chain()
+ */
+ if (task->task_padded_sg) {
+ sg_mark_end(&task->task_sg[task->task_sg_num - 1]);
+ /*
+ * Added the 'if' check before marking end of bi-directional
+ * scatterlist (which gets created only in case of request
+ * (RD + WR).
+ */
+ if (task->task_sg_bidi)
+ sg_mark_end(&task->task_sg_bidi[task->task_sg_num - 1]);
+ }
+
+ DEBUG_SC("Successfully allocated task->task_sg_num(%u),"
+ " task_sg_num_padded(%u)\n", task->task_sg_num,
+ task_sg_num_padded);
+
+ return task->task_sg_num;
+}
+
+static inline int transport_set_tasks_sectors_disk(
+ struct se_task *task,
+ struct se_device *dev,
+ unsigned long long lba,
+ u32 sectors,
+ int *max_sectors_set)
+{
+ if ((lba + sectors) > transport_dev_end_lba(dev)) {
+ task->task_sectors = ((transport_dev_end_lba(dev) - lba) + 1);
+
+ if (task->task_sectors > DEV_ATTRIB(dev)->max_sectors) {
+ task->task_sectors = DEV_ATTRIB(dev)->max_sectors;
+ *max_sectors_set = 1;
+ }
+ } else {
+ if (sectors > DEV_ATTRIB(dev)->max_sectors) {
+ task->task_sectors = DEV_ATTRIB(dev)->max_sectors;
+ *max_sectors_set = 1;
+ } else
+ task->task_sectors = sectors;
+ }
+
+ return 0;
+}
+
+static inline int transport_set_tasks_sectors_non_disk(
+ struct se_task *task,
+ struct se_device *dev,
+ unsigned long long lba,
+ u32 sectors,
+ int *max_sectors_set)
+{
+ if (sectors > DEV_ATTRIB(dev)->max_sectors) {
+ task->task_sectors = DEV_ATTRIB(dev)->max_sectors;
+ *max_sectors_set = 1;
+ } else
+ task->task_sectors = sectors;
+
+ return 0;
+}
+
+static inline int transport_set_tasks_sectors(
+ struct se_task *task,
+ struct se_device *dev,
+ unsigned long long lba,
+ u32 sectors,
+ int *max_sectors_set)
+{
+ return (TRANSPORT(dev)->get_device_type(dev) == TYPE_DISK) ?
+ transport_set_tasks_sectors_disk(task, dev, lba, sectors,
+ max_sectors_set) :
+ transport_set_tasks_sectors_non_disk(task, dev, lba, sectors,
+ max_sectors_set);
+}
+
+static int transport_map_sg_to_mem(
+ struct se_cmd *cmd,
+ struct list_head *se_mem_list,
+ void *in_mem,
+ u32 *se_mem_cnt)
+{
+ struct se_mem *se_mem;
+ struct scatterlist *sg;
+ u32 sg_count = 1, cmd_size = cmd->data_length;
+
+ if (!in_mem) {
+ printk(KERN_ERR "No source scatterlist\n");
+ return -1;
+ }
+ sg = (struct scatterlist *)in_mem;
+
+ while (cmd_size) {
+ se_mem = kmem_cache_zalloc(se_mem_cache, GFP_KERNEL);
+ if (!(se_mem)) {
+ printk(KERN_ERR "Unable to allocate struct se_mem\n");
+ return -1;
+ }
+ INIT_LIST_HEAD(&se_mem->se_list);
+ DEBUG_MEM("sg_to_mem: Starting loop with cmd_size: %u"
+ " sg_page: %p offset: %d length: %d\n", cmd_size,
+ sg_page(sg), sg->offset, sg->length);
+
+ se_mem->se_page = sg_page(sg);
+ se_mem->se_off = sg->offset;
+
+ if (cmd_size > sg->length) {
+ se_mem->se_len = sg->length;
+ sg = sg_next(sg);
+ sg_count++;
+ } else
+ se_mem->se_len = cmd_size;
+
+ cmd_size -= se_mem->se_len;
+
+ DEBUG_MEM("sg_to_mem: *se_mem_cnt: %u cmd_size: %u\n",
+ *se_mem_cnt, cmd_size);
+ DEBUG_MEM("sg_to_mem: Final se_page: %p se_off: %d se_len: %d\n",
+ se_mem->se_page, se_mem->se_off, se_mem->se_len);
+
+ list_add_tail(&se_mem->se_list, se_mem_list);
+ (*se_mem_cnt)++;
+ }
+
+ DEBUG_MEM("task[0] - Mapped(%u) struct scatterlist segments to(%u)"
+ " struct se_mem\n", sg_count, *se_mem_cnt);
+
+ if (sg_count != *se_mem_cnt)
+ BUG();
+
+ return 0;
+}
+
+/* transport_map_mem_to_sg():
+ *
+ *
+ */
+int transport_map_mem_to_sg(
+ struct se_task *task,
+ struct list_head *se_mem_list,
+ void *in_mem,
+ struct se_mem *in_se_mem,
+ struct se_mem **out_se_mem,
+ u32 *se_mem_cnt,
+ u32 *task_offset)
+{
+ struct se_cmd *se_cmd = task->task_se_cmd;
+ struct se_mem *se_mem = in_se_mem;
+ struct scatterlist *sg = (struct scatterlist *)in_mem;
+ u32 task_size = task->task_size, sg_no = 0;
+
+ if (!sg) {
+ printk(KERN_ERR "Unable to locate valid struct"
+ " scatterlist pointer\n");
+ return -1;
+ }
+
+ while (task_size != 0) {
+ /*
+ * Setup the contigious array of scatterlists for
+ * this struct se_task.
+ */
+ sg_assign_page(sg, se_mem->se_page);
+
+ if (*task_offset == 0) {
+ sg->offset = se_mem->se_off;
+
+ if (task_size >= se_mem->se_len) {
+ sg->length = se_mem->se_len;
+
+ if (!(list_is_last(&se_mem->se_list,
+ T_TASK(se_cmd)->t_mem_list))) {
+ se_mem = list_entry(se_mem->se_list.next,
+ struct se_mem, se_list);
+ (*se_mem_cnt)++;
+ }
+ } else {
+ sg->length = task_size;
+ /*
+ * Determine if we need to calculate an offset
+ * into the struct se_mem on the next go around..
+ */
+ task_size -= sg->length;
+ if (!(task_size))
+ *task_offset = sg->length;
+
+ goto next;
+ }
+
+ } else {
+ sg->offset = (*task_offset + se_mem->se_off);
+
+ if ((se_mem->se_len - *task_offset) > task_size) {
+ sg->length = task_size;
+ /*
+ * Determine if we need to calculate an offset
+ * into the struct se_mem on the next go around..
+ */
+ task_size -= sg->length;
+ if (!(task_size))
+ *task_offset += sg->length;
+
+ goto next;
+ } else {
+ sg->length = (se_mem->se_len - *task_offset);
+
+ if (!(list_is_last(&se_mem->se_list,
+ T_TASK(se_cmd)->t_mem_list))) {
+ se_mem = list_entry(se_mem->se_list.next,
+ struct se_mem, se_list);
+ (*se_mem_cnt)++;
+ }
+ }
+
+ *task_offset = 0;
+ }
+ task_size -= sg->length;
+next:
+ DEBUG_MEM("task[%u] mem_to_sg - sg[%u](%p)(%u)(%u) - Reducing"
+ " task_size to(%u), task_offset: %u\n", task->task_no, sg_no,
+ sg_page(sg), sg->length, sg->offset, task_size, *task_offset);
+
+ sg_no++;
+ if (!(task_size))
+ break;
+
+ sg = sg_next(sg);
+
+ if (task_size > se_cmd->data_length)
+ BUG();
+ }
+ *out_se_mem = se_mem;
+
+ DEBUG_MEM("task[%u] - Mapped(%u) struct se_mem segments to total(%u)"
+ " SGs\n", task->task_no, *se_mem_cnt, sg_no);
+
+ return 0;
+}
+
+/*
+ * This function can be used by HW target mode drivers to create a linked
+ * scatterlist from all contiguously allocated struct se_task->task_sg[].
+ * This is intended to be called during the completion path by TCM Core
+ * when struct target_core_fabric_ops->check_task_sg_chaining is enabled.
+ */
+void transport_do_task_sg_chain(struct se_cmd *cmd)
+{
+ struct scatterlist *sg_head = NULL, *sg_link = NULL, *sg_first = NULL;
+ struct scatterlist *sg_head_cur = NULL, *sg_link_cur = NULL;
+ struct scatterlist *sg, *sg_end = NULL, *sg_end_cur = NULL;
+ struct se_task *task;
+ struct target_core_fabric_ops *tfo = CMD_TFO(cmd);
+ u32 task_sg_num = 0, sg_count = 0;
+ int i;
+
+ if (tfo->task_sg_chaining == 0) {
+ printk(KERN_ERR "task_sg_chaining is diabled for fabric module:"
+ " %s\n", tfo->get_fabric_name());
+ dump_stack();
+ return;
+ }
+ /*
+ * Walk the struct se_task list and setup scatterlist chains
+ * for each contiguosly allocated struct se_task->task_sg[].
+ */
+ list_for_each_entry(task, &T_TASK(cmd)->t_task_list, t_list) {
+ if (!(task->task_sg) || !(task->task_padded_sg))
+ continue;
+
+ if (sg_head && sg_link) {
+ sg_head_cur = &task->task_sg[0];
+ sg_link_cur = &task->task_sg[task->task_sg_num];
+ /*
+ * Either add chain or mark end of scatterlist
+ */
+ if (!(list_is_last(&task->t_list,
+ &T_TASK(cmd)->t_task_list))) {
+ /*
+ * Clear existing SGL termination bit set in
+ * transport_calc_sg_num(), see sg_mark_end()
+ */
+ sg_end_cur = &task->task_sg[task->task_sg_num - 1];
+ sg_end_cur->page_link &= ~0x02;
+
+ sg_chain(sg_head, task_sg_num, sg_head_cur);
+ sg_count += (task->task_sg_num + 1);
+ } else
+ sg_count += task->task_sg_num;
+
+ sg_head = sg_head_cur;
+ sg_link = sg_link_cur;
+ task_sg_num = task->task_sg_num;
+ continue;
+ }
+ sg_head = sg_first = &task->task_sg[0];
+ sg_link = &task->task_sg[task->task_sg_num];
+ task_sg_num = task->task_sg_num;
+ /*
+ * Check for single task..
+ */
+ if (!(list_is_last(&task->t_list, &T_TASK(cmd)->t_task_list))) {
+ /*
+ * Clear existing SGL termination bit set in
+ * transport_calc_sg_num(), see sg_mark_end()
+ */
+ sg_end = &task->task_sg[task->task_sg_num - 1];
+ sg_end->page_link &= ~0x02;
+ sg_count += (task->task_sg_num + 1);
+ } else
+ sg_count += task->task_sg_num;
+ }
+ /*
+ * Setup the starting pointer and total t_tasks_sg_linked_no including
+ * padding SGs for linking and to mark the end.
+ */
+ T_TASK(cmd)->t_tasks_sg_chained = sg_first;
+ T_TASK(cmd)->t_tasks_sg_chained_no = sg_count;
+
+ DEBUG_CMD_M("Setup T_TASK(cmd)->t_tasks_sg_chained: %p and"
+ " t_tasks_sg_chained_no: %u\n", T_TASK(cmd)->t_tasks_sg_chained,
+ T_TASK(cmd)->t_tasks_sg_chained_no);
+
+ for_each_sg(T_TASK(cmd)->t_tasks_sg_chained, sg,
+ T_TASK(cmd)->t_tasks_sg_chained_no, i) {
+
+ DEBUG_CMD_M("SG: %p page: %p length: %d offset: %d\n",
+ sg, sg_page(sg), sg->length, sg->offset);
+ if (sg_is_chain(sg))
+ DEBUG_CMD_M("SG: %p sg_is_chain=1\n", sg);
+ if (sg_is_last(sg))
+ DEBUG_CMD_M("SG: %p sg_is_last=1\n", sg);
+ }
+
+}
+EXPORT_SYMBOL(transport_do_task_sg_chain);
+
+static int transport_do_se_mem_map(
+ struct se_device *dev,
+ struct se_task *task,
+ struct list_head *se_mem_list,
+ void *in_mem,
+ struct se_mem *in_se_mem,
+ struct se_mem **out_se_mem,
+ u32 *se_mem_cnt,
+ u32 *task_offset_in)
+{
+ u32 task_offset = *task_offset_in;
+ int ret = 0;
+ /*
+ * se_subsystem_api_t->do_se_mem_map is used when internal allocation
+ * has been done by the transport plugin.
+ */
+ if (TRANSPORT(dev)->do_se_mem_map) {
+ ret = TRANSPORT(dev)->do_se_mem_map(task, se_mem_list,
+ in_mem, in_se_mem, out_se_mem, se_mem_cnt,
+ task_offset_in);
+ if (ret == 0)
+ T_TASK(task->task_se_cmd)->t_tasks_se_num += *se_mem_cnt;
+
+ return ret;
+ }
+ /*
+ * This is the normal path for all normal non BIDI and BIDI-COMMAND
+ * WRITE payloads.. If we need to do BIDI READ passthrough for
+ * TCM/pSCSI the first call to transport_do_se_mem_map ->
+ * transport_calc_sg_num() -> transport_map_mem_to_sg() will do the
+ * allocation for task->task_sg_bidi, and the subsequent call to
+ * transport_do_se_mem_map() from transport_generic_get_cdb_count()
+ */
+ if (!(task->task_sg_bidi)) {
+ /*
+ * Assume default that transport plugin speaks preallocated
+ * scatterlists.
+ */
+ if (!(transport_calc_sg_num(task, in_se_mem, task_offset)))
+ return -1;
+ /*
+ * struct se_task->task_sg now contains the struct scatterlist array.
+ */
+ return transport_map_mem_to_sg(task, se_mem_list, task->task_sg,
+ in_se_mem, out_se_mem, se_mem_cnt,
+ task_offset_in);
+ }
+ /*
+ * Handle the se_mem_list -> struct task->task_sg_bidi
+ * memory map for the extra BIDI READ payload
+ */
+ return transport_map_mem_to_sg(task, se_mem_list, task->task_sg_bidi,
+ in_se_mem, out_se_mem, se_mem_cnt,
+ task_offset_in);
+}
+
+static u32 transport_generic_get_cdb_count(
+ struct se_cmd *cmd,
+ unsigned long long lba,
+ u32 sectors,
+ enum dma_data_direction data_direction,
+ struct list_head *mem_list,
+ int set_counts)
+{
+ unsigned char *cdb = NULL;
+ struct se_task *task;
+ struct se_mem *se_mem = NULL, *se_mem_lout = NULL;
+ struct se_mem *se_mem_bidi = NULL, *se_mem_bidi_lout = NULL;
+ struct se_device *dev = SE_DEV(cmd);
+ int max_sectors_set = 0, ret;
+ u32 task_offset_in = 0, se_mem_cnt = 0, se_mem_bidi_cnt = 0, task_cdbs = 0;
+
+ if (!mem_list) {
+ printk(KERN_ERR "mem_list is NULL in transport_generic_get"
+ "_cdb_count()\n");
+ return 0;
+ }
+ /*
+ * While using RAMDISK_DR backstores is the only case where
+ * mem_list will ever be empty at this point.
+ */
+ if (!(list_empty(mem_list)))
+ se_mem = list_entry(mem_list->next, struct se_mem, se_list);
+ /*
+ * Check for extra se_mem_bidi mapping for BIDI-COMMANDs to
+ * struct se_task->task_sg_bidi for TCM/pSCSI passthrough operation
+ */
+ if ((T_TASK(cmd)->t_mem_bidi_list != NULL) &&
+ !(list_empty(T_TASK(cmd)->t_mem_bidi_list)) &&
+ (TRANSPORT(dev)->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV))
+ se_mem_bidi = list_entry(T_TASK(cmd)->t_mem_bidi_list->next,
+ struct se_mem, se_list);
+
+ while (sectors) {
+ DEBUG_VOL("ITT[0x%08x] LBA(%llu) SectorsLeft(%u) EOBJ(%llu)\n",
+ CMD_TFO(cmd)->get_task_tag(cmd), lba, sectors,
+ transport_dev_end_lba(dev));
+
+ task = transport_generic_get_task(cmd, data_direction);
+ if (!(task))
+ goto out;
+
+ transport_set_tasks_sectors(task, dev, lba, sectors,
+ &max_sectors_set);
+
+ task->task_lba = lba;
+ lba += task->task_sectors;
+ sectors -= task->task_sectors;
+ task->task_size = (task->task_sectors *
+ DEV_ATTRIB(dev)->block_size);
+
+ cdb = TRANSPORT(dev)->get_cdb(task);
+ if ((cdb)) {
+ memcpy(cdb, T_TASK(cmd)->t_task_cdb,
+ scsi_command_size(T_TASK(cmd)->t_task_cdb));
+ cmd->transport_split_cdb(task->task_lba,
+ &task->task_sectors, cdb);
+ }
+
+ /*
+ * Perform the SE OBJ plugin and/or Transport plugin specific
+ * mapping for T_TASK(cmd)->t_mem_list. And setup the
+ * task->task_sg and if necessary task->task_sg_bidi
+ */
+ ret = transport_do_se_mem_map(dev, task, mem_list,
+ NULL, se_mem, &se_mem_lout, &se_mem_cnt,
+ &task_offset_in);
+ if (ret < 0)
+ goto out;
+
+ se_mem = se_mem_lout;
+ /*
+ * Setup the T_TASK(cmd)->t_mem_bidi_list -> task->task_sg_bidi
+ * mapping for SCSI READ for BIDI-COMMAND passthrough with TCM/pSCSI
+ *
+ * Note that the first call to transport_do_se_mem_map() above will
+ * allocate struct se_task->task_sg_bidi in transport_do_se_mem_map()
+ * -> transport_calc_sg_num(), and the second here will do the
+ * mapping for SCSI READ for BIDI-COMMAND passthrough with TCM/pSCSI.
+ */
+ if (task->task_sg_bidi != NULL) {
+ ret = transport_do_se_mem_map(dev, task,
+ T_TASK(cmd)->t_mem_bidi_list, NULL,
+ se_mem_bidi, &se_mem_bidi_lout, &se_mem_bidi_cnt,
+ &task_offset_in);
+ if (ret < 0)
+ goto out;
+
+ se_mem_bidi = se_mem_bidi_lout;
+ }
+ task_cdbs++;
+
+ DEBUG_VOL("Incremented task_cdbs(%u) task->task_sg_num(%u)\n",
+ task_cdbs, task->task_sg_num);
+
+ if (max_sectors_set) {
+ max_sectors_set = 0;
+ continue;
+ }
+
+ if (!sectors)
+ break;
+ }
+
+ if (set_counts) {
+ atomic_inc(&T_TASK(cmd)->t_fe_count);
+ atomic_inc(&T_TASK(cmd)->t_se_count);
+ }
+
+ DEBUG_VOL("ITT[0x%08x] total %s cdbs(%u)\n",
+ CMD_TFO(cmd)->get_task_tag(cmd), (data_direction == DMA_TO_DEVICE)
+ ? "DMA_TO_DEVICE" : "DMA_FROM_DEVICE", task_cdbs);
+
+ return task_cdbs;
+out:
+ return 0;
+}
+
+static int
+transport_map_control_cmd_to_task(struct se_cmd *cmd)
+{
+ struct se_device *dev = SE_DEV(cmd);
+ unsigned char *cdb;
+ struct se_task *task;
+ int ret;
+
+ task = transport_generic_get_task(cmd, cmd->data_direction);
+ if (!task)
+ return PYX_TRANSPORT_OUT_OF_MEMORY_RESOURCES;
+
+ cdb = TRANSPORT(dev)->get_cdb(task);
+ if (cdb)
+ memcpy(cdb, cmd->t_task->t_task_cdb,
+ scsi_command_size(cmd->t_task->t_task_cdb));
+
+ task->task_size = cmd->data_length;
+ task->task_sg_num =
+ (cmd->se_cmd_flags & SCF_SCSI_CONTROL_SG_IO_CDB) ? 1 : 0;
+
+ atomic_inc(&cmd->t_task->t_fe_count);
+ atomic_inc(&cmd->t_task->t_se_count);
+
+ if (cmd->se_cmd_flags & SCF_SCSI_CONTROL_SG_IO_CDB) {
+ struct se_mem *se_mem = NULL, *se_mem_lout = NULL;
+ u32 se_mem_cnt = 0, task_offset = 0;
+
+ BUG_ON(list_empty(cmd->t_task->t_mem_list));
+
+ ret = transport_do_se_mem_map(dev, task,
+ cmd->t_task->t_mem_list, NULL, se_mem,
+ &se_mem_lout, &se_mem_cnt, &task_offset);
+ if (ret < 0)
+ return PYX_TRANSPORT_OUT_OF_MEMORY_RESOURCES;
+
+ if (dev->transport->map_task_SG)
+ return dev->transport->map_task_SG(task);
+ return 0;
+ } else if (cmd->se_cmd_flags & SCF_SCSI_CONTROL_NONSG_IO_CDB) {
+ if (dev->transport->map_task_non_SG)
+ return dev->transport->map_task_non_SG(task);
+ return 0;
+ } else if (cmd->se_cmd_flags & SCF_SCSI_NON_DATA_CDB) {
+ if (dev->transport->cdb_none)
+ return dev->transport->cdb_none(task);
+ return 0;
+ } else {
+ BUG();
+ return PYX_TRANSPORT_OUT_OF_MEMORY_RESOURCES;
+ }
+}
+
+/* transport_generic_new_cmd(): Called from transport_processing_thread()
+ *
+ * Allocate storage transport resources from a set of values predefined
+ * by transport_generic_cmd_sequencer() from the iSCSI Target RX process.
+ * Any non zero return here is treated as an "out of resource' op here.
+ */
+ /*
+ * Generate struct se_task(s) and/or their payloads for this CDB.
+ */
+static int transport_generic_new_cmd(struct se_cmd *cmd)
+{
+ struct se_portal_group *se_tpg;
+ struct se_task *task;
+ struct se_device *dev = SE_DEV(cmd);
+ int ret = 0;
+
+ /*
+ * Determine is the TCM fabric module has already allocated physical
+ * memory, and is directly calling transport_generic_map_mem_to_cmd()
+ * to setup beforehand the linked list of physical memory at
+ * T_TASK(cmd)->t_mem_list of struct se_mem->se_page
+ */
+ if (!(cmd->se_cmd_flags & SCF_PASSTHROUGH_SG_TO_MEM_NOALLOC)) {
+ ret = transport_allocate_resources(cmd);
+ if (ret < 0)
+ return ret;
+ }
+
+ ret = transport_get_sectors(cmd);
+ if (ret < 0)
+ return ret;
+
+ ret = transport_new_cmd_obj(cmd);
+ if (ret < 0)
+ return ret;
+
+ /*
+ * Determine if the calling TCM fabric module is talking to
+ * Linux/NET via kernel sockets and needs to allocate a
+ * struct iovec array to complete the struct se_cmd
+ */
+ se_tpg = SE_LUN(cmd)->lun_sep->sep_tpg;
+ if (TPG_TFO(se_tpg)->alloc_cmd_iovecs != NULL) {
+ ret = TPG_TFO(se_tpg)->alloc_cmd_iovecs(cmd);
+ if (ret < 0)
+ return PYX_TRANSPORT_OUT_OF_MEMORY_RESOURCES;
+ }
+
+ if (cmd->se_cmd_flags & SCF_SCSI_DATA_SG_IO_CDB) {
+ list_for_each_entry(task, &T_TASK(cmd)->t_task_list, t_list) {
+ if (atomic_read(&task->task_sent))
+ continue;
+ if (!dev->transport->map_task_SG)
+ continue;
+
+ ret = dev->transport->map_task_SG(task);
+ if (ret < 0)
+ return ret;
+ }
+ } else {
+ ret = transport_map_control_cmd_to_task(cmd);
+ if (ret < 0)
+ return ret;
+ }
+
+ /*
+ * For WRITEs, let the iSCSI Target RX Thread know its buffer is ready..
+ * This WRITE struct se_cmd (and all of its associated struct se_task's)
+ * will be added to the struct se_device execution queue after its WRITE
+ * data has arrived. (ie: It gets handled by the transport processing
+ * thread a second time)
+ */
+ if (cmd->data_direction == DMA_TO_DEVICE) {
+ transport_add_tasks_to_state_queue(cmd);
+ return transport_generic_write_pending(cmd);
+ }
+ /*
+ * Everything else but a WRITE, add the struct se_cmd's struct se_task's
+ * to the execution queue.
+ */
+ transport_execute_tasks(cmd);
+ return 0;
+}
+
+/* transport_generic_process_write():
+ *
+ *
+ */
+void transport_generic_process_write(struct se_cmd *cmd)
+{
+#if 0
+ /*
+ * Copy SCSI Presented DTL sector(s) from received buffers allocated to
+ * original EDTL
+ */
+ if (cmd->se_cmd_flags & SCF_UNDERFLOW_BIT) {
+ if (!T_TASK(cmd)->t_tasks_se_num) {
+ unsigned char *dst, *buf =
+ (unsigned char *)T_TASK(cmd)->t_task_buf;
+
+ dst = kzalloc(cmd->cmd_spdtl), GFP_KERNEL);
+ if (!(dst)) {
+ printk(KERN_ERR "Unable to allocate memory for"
+ " WRITE underflow\n");
+ transport_generic_request_failure(cmd, NULL,
+ PYX_TRANSPORT_REQ_TOO_MANY_SECTORS, 1);
+ return;
+ }
+ memcpy(dst, buf, cmd->cmd_spdtl);
+
+ kfree(T_TASK(cmd)->t_task_buf);
+ T_TASK(cmd)->t_task_buf = dst;
+ } else {
+ struct scatterlist *sg =
+ (struct scatterlist *sg)T_TASK(cmd)->t_task_buf;
+ struct scatterlist *orig_sg;
+
+ orig_sg = kzalloc(sizeof(struct scatterlist) *
+ T_TASK(cmd)->t_tasks_se_num,
+ GFP_KERNEL))) {
+ if (!(orig_sg)) {
+ printk(KERN_ERR "Unable to allocate memory"
+ " for WRITE underflow\n");
+ transport_generic_request_failure(cmd, NULL,
+ PYX_TRANSPORT_REQ_TOO_MANY_SECTORS, 1);
+ return;
+ }
+
+ memcpy(orig_sg, T_TASK(cmd)->t_task_buf,
+ sizeof(struct scatterlist) *
+ T_TASK(cmd)->t_tasks_se_num);
+
+ cmd->data_length = cmd->cmd_spdtl;
+ /*
+ * FIXME, clear out original struct se_task and state
+ * information.
+ */
+ if (transport_generic_new_cmd(cmd) < 0) {
+ transport_generic_request_failure(cmd, NULL,
+ PYX_TRANSPORT_REQ_TOO_MANY_SECTORS, 1);
+ kfree(orig_sg);
+ return;
+ }
+
+ transport_memcpy_write_sg(cmd, orig_sg);
+ }
+ }
+#endif
+ transport_execute_tasks(cmd);
+}
+EXPORT_SYMBOL(transport_generic_process_write);
+
+/* transport_generic_write_pending():
+ *
+ *
+ */
+static int transport_generic_write_pending(struct se_cmd *cmd)
+{
+ unsigned long flags;
+ int ret;
+
+ spin_lock_irqsave(&T_TASK(cmd)->t_state_lock, flags);
+ cmd->t_state = TRANSPORT_WRITE_PENDING;
+ spin_unlock_irqrestore(&T_TASK(cmd)->t_state_lock, flags);
+ /*
+ * For the TCM control CDBs using a contiguous buffer, do the memcpy
+ * from the passed Linux/SCSI struct scatterlist located at
+ * T_TASK(se_cmd)->t_task_pt_buf to the contiguous buffer at
+ * T_TASK(se_cmd)->t_task_buf.
+ */
+ if (cmd->se_cmd_flags & SCF_PASSTHROUGH_CONTIG_TO_SG)
+ transport_memcpy_read_contig(cmd,
+ T_TASK(cmd)->t_task_buf,
+ T_TASK(cmd)->t_task_pt_sgl);
+ /*
+ * Clear the se_cmd for WRITE_PENDING status in order to set
+ * T_TASK(cmd)->t_transport_active=0 so that transport_generic_handle_data
+ * can be called from HW target mode interrupt code. This is safe
+ * to be called with transport_off=1 before the CMD_TFO(cmd)->write_pending
+ * because the se_cmd->se_lun pointer is not being cleared.
+ */
+ transport_cmd_check_stop(cmd, 1, 0);
+
+ /*
+ * Call the fabric write_pending function here to let the
+ * frontend know that WRITE buffers are ready.
+ */
+ ret = CMD_TFO(cmd)->write_pending(cmd);
+ if (ret < 0)
+ return ret;
+
+ return PYX_TRANSPORT_WRITE_PENDING;
+}
+
+/* transport_release_cmd_to_pool():
+ *
+ *
+ */
+void transport_release_cmd_to_pool(struct se_cmd *cmd)
+{
+ BUG_ON(!T_TASK(cmd));
+ BUG_ON(!CMD_TFO(cmd));
+
+ transport_free_se_cmd(cmd);
+ CMD_TFO(cmd)->release_cmd_to_pool(cmd);
+}
+EXPORT_SYMBOL(transport_release_cmd_to_pool);
+
+/* transport_generic_free_cmd():
+ *
+ * Called from processing frontend to release storage engine resources
+ */
+void transport_generic_free_cmd(
+ struct se_cmd *cmd,
+ int wait_for_tasks,
+ int release_to_pool,
+ int session_reinstatement)
+{
+ if (!(cmd->se_cmd_flags & SCF_SE_LUN_CMD) || !T_TASK(cmd))
+ transport_release_cmd_to_pool(cmd);
+ else {
+ core_dec_lacl_count(cmd->se_sess->se_node_acl, cmd);
+
+ if (SE_LUN(cmd)) {
+#if 0
+ printk(KERN_INFO "cmd: %p ITT: 0x%08x contains"
+ " SE_LUN(cmd)\n", cmd,
+ CMD_TFO(cmd)->get_task_tag(cmd));
+#endif
+ transport_lun_remove_cmd(cmd);
+ }
+
+ if (wait_for_tasks && cmd->transport_wait_for_tasks)
+ cmd->transport_wait_for_tasks(cmd, 0, 0);
+
+ transport_generic_remove(cmd, release_to_pool,
+ session_reinstatement);
+ }
+}
+EXPORT_SYMBOL(transport_generic_free_cmd);
+
+static void transport_nop_wait_for_tasks(
+ struct se_cmd *cmd,
+ int remove_cmd,
+ int session_reinstatement)
+{
+ return;
+}
+
+/* transport_lun_wait_for_tasks():
+ *
+ * Called from ConfigFS context to stop the passed struct se_cmd to allow
+ * an struct se_lun to be successfully shutdown.
+ */
+static int transport_lun_wait_for_tasks(struct se_cmd *cmd, struct se_lun *lun)
+{
+ unsigned long flags;
+ int ret;
+ /*
+ * If the frontend has already requested this struct se_cmd to
+ * be stopped, we can safely ignore this struct se_cmd.
+ */
+ spin_lock_irqsave(&T_TASK(cmd)->t_state_lock, flags);
+ if (atomic_read(&T_TASK(cmd)->t_transport_stop)) {
+ atomic_set(&T_TASK(cmd)->transport_lun_stop, 0);
+ DEBUG_TRANSPORT_S("ConfigFS ITT[0x%08x] - t_transport_stop =="
+ " TRUE, skipping\n", CMD_TFO(cmd)->get_task_tag(cmd));
+ spin_unlock_irqrestore(&T_TASK(cmd)->t_state_lock, flags);
+ transport_cmd_check_stop(cmd, 1, 0);
+ return -1;
+ }
+ atomic_set(&T_TASK(cmd)->transport_lun_fe_stop, 1);
+ spin_unlock_irqrestore(&T_TASK(cmd)->t_state_lock, flags);
+
+ wake_up_interruptible(&SE_DEV(cmd)->dev_queue_obj->thread_wq);
+
+ ret = transport_stop_tasks_for_cmd(cmd);
+
+ DEBUG_TRANSPORT_S("ConfigFS: cmd: %p t_task_cdbs: %d stop tasks ret:"
+ " %d\n", cmd, T_TASK(cmd)->t_task_cdbs, ret);
+ if (!ret) {
+ DEBUG_TRANSPORT_S("ConfigFS: ITT[0x%08x] - stopping cmd....\n",
+ CMD_TFO(cmd)->get_task_tag(cmd));
+ wait_for_completion(&T_TASK(cmd)->transport_lun_stop_comp);
+ DEBUG_TRANSPORT_S("ConfigFS: ITT[0x%08x] - stopped cmd....\n",
+ CMD_TFO(cmd)->get_task_tag(cmd));
+ }
+ transport_remove_cmd_from_queue(cmd, SE_DEV(cmd)->dev_queue_obj);
+
+ return 0;
+}
+
+/* #define DEBUG_CLEAR_LUN */
+#ifdef DEBUG_CLEAR_LUN
+#define DEBUG_CLEAR_L(x...) printk(KERN_INFO x)
+#else
+#define DEBUG_CLEAR_L(x...)
+#endif
+
+static void __transport_clear_lun_from_sessions(struct se_lun *lun)
+{
+ struct se_cmd *cmd = NULL;
+ unsigned long lun_flags, cmd_flags;
+ /*
+ * Do exception processing and return CHECK_CONDITION status to the
+ * Initiator Port.
+ */
+ spin_lock_irqsave(&lun->lun_cmd_lock, lun_flags);
+ while (!list_empty_careful(&lun->lun_cmd_list)) {
+ cmd = list_entry(lun->lun_cmd_list.next,
+ struct se_cmd, se_lun_list);
+ list_del(&cmd->se_lun_list);
+
+ if (!(T_TASK(cmd))) {
+ printk(KERN_ERR "ITT: 0x%08x, T_TASK(cmd) = NULL"
+ "[i,t]_state: %u/%u\n",
+ CMD_TFO(cmd)->get_task_tag(cmd),
+ CMD_TFO(cmd)->get_cmd_state(cmd), cmd->t_state);
+ BUG();
+ }
+ atomic_set(&T_TASK(cmd)->transport_lun_active, 0);
+ /*
+ * This will notify iscsi_target_transport.c:
+ * transport_cmd_check_stop() that a LUN shutdown is in
+ * progress for the iscsi_cmd_t.
+ */
+ spin_lock(&T_TASK(cmd)->t_state_lock);
+ DEBUG_CLEAR_L("SE_LUN[%d] - Setting T_TASK(cmd)->transport"
+ "_lun_stop for ITT: 0x%08x\n",
+ SE_LUN(cmd)->unpacked_lun,
+ CMD_TFO(cmd)->get_task_tag(cmd));
+ atomic_set(&T_TASK(cmd)->transport_lun_stop, 1);
+ spin_unlock(&T_TASK(cmd)->t_state_lock);
+
+ spin_unlock_irqrestore(&lun->lun_cmd_lock, lun_flags);
+
+ if (!(SE_LUN(cmd))) {
+ printk(KERN_ERR "ITT: 0x%08x, [i,t]_state: %u/%u\n",
+ CMD_TFO(cmd)->get_task_tag(cmd),
+ CMD_TFO(cmd)->get_cmd_state(cmd), cmd->t_state);
+ BUG();
+ }
+ /*
+ * If the Storage engine still owns the iscsi_cmd_t, determine
+ * and/or stop its context.
+ */
+ DEBUG_CLEAR_L("SE_LUN[%d] - ITT: 0x%08x before transport"
+ "_lun_wait_for_tasks()\n", SE_LUN(cmd)->unpacked_lun,
+ CMD_TFO(cmd)->get_task_tag(cmd));
+
+ if (transport_lun_wait_for_tasks(cmd, SE_LUN(cmd)) < 0) {
+ spin_lock_irqsave(&lun->lun_cmd_lock, lun_flags);
+ continue;
+ }
+
+ DEBUG_CLEAR_L("SE_LUN[%d] - ITT: 0x%08x after transport_lun"
+ "_wait_for_tasks(): SUCCESS\n",
+ SE_LUN(cmd)->unpacked_lun,
+ CMD_TFO(cmd)->get_task_tag(cmd));
+
+ spin_lock_irqsave(&T_TASK(cmd)->t_state_lock, cmd_flags);
+ if (!(atomic_read(&T_TASK(cmd)->transport_dev_active))) {
+ spin_unlock_irqrestore(&T_TASK(cmd)->t_state_lock, cmd_flags);
+ goto check_cond;
+ }
+ atomic_set(&T_TASK(cmd)->transport_dev_active, 0);
+ transport_all_task_dev_remove_state(cmd);
+ spin_unlock_irqrestore(&T_TASK(cmd)->t_state_lock, cmd_flags);
+
+ transport_free_dev_tasks(cmd);
+ /*
+ * The Storage engine stopped this struct se_cmd before it was
+ * send to the fabric frontend for delivery back to the
+ * Initiator Node. Return this SCSI CDB back with an
+ * CHECK_CONDITION status.
+ */
+check_cond:
+ transport_send_check_condition_and_sense(cmd,
+ TCM_NON_EXISTENT_LUN, 0);
+ /*
+ * If the fabric frontend is waiting for this iscsi_cmd_t to
+ * be released, notify the waiting thread now that LU has
+ * finished accessing it.
+ */
+ spin_lock_irqsave(&T_TASK(cmd)->t_state_lock, cmd_flags);
+ if (atomic_read(&T_TASK(cmd)->transport_lun_fe_stop)) {
+ DEBUG_CLEAR_L("SE_LUN[%d] - Detected FE stop for"
+ " struct se_cmd: %p ITT: 0x%08x\n",
+ lun->unpacked_lun,
+ cmd, CMD_TFO(cmd)->get_task_tag(cmd));
+
+ spin_unlock_irqrestore(&T_TASK(cmd)->t_state_lock,
+ cmd_flags);
+ transport_cmd_check_stop(cmd, 1, 0);
+ complete(&T_TASK(cmd)->transport_lun_fe_stop_comp);
+ spin_lock_irqsave(&lun->lun_cmd_lock, lun_flags);
+ continue;
+ }
+ DEBUG_CLEAR_L("SE_LUN[%d] - ITT: 0x%08x finished processing\n",
+ lun->unpacked_lun, CMD_TFO(cmd)->get_task_tag(cmd));
+
+ spin_unlock_irqrestore(&T_TASK(cmd)->t_state_lock, cmd_flags);
+ spin_lock_irqsave(&lun->lun_cmd_lock, lun_flags);
+ }
+ spin_unlock_irqrestore(&lun->lun_cmd_lock, lun_flags);
+}
+
+static int transport_clear_lun_thread(void *p)
+{
+ struct se_lun *lun = (struct se_lun *)p;
+
+ __transport_clear_lun_from_sessions(lun);
+ complete(&lun->lun_shutdown_comp);
+
+ return 0;
+}
+
+int transport_clear_lun_from_sessions(struct se_lun *lun)
+{
+ struct task_struct *kt;
+
+ kt = kthread_run(transport_clear_lun_thread, (void *)lun,
+ "tcm_cl_%u", lun->unpacked_lun);
+ if (IS_ERR(kt)) {
+ printk(KERN_ERR "Unable to start clear_lun thread\n");
+ return -1;
+ }
+ wait_for_completion(&lun->lun_shutdown_comp);
+
+ return 0;
+}
+
+/* transport_generic_wait_for_tasks():
+ *
+ * Called from frontend or passthrough context to wait for storage engine
+ * to pause and/or release frontend generated struct se_cmd.
+ */
+static void transport_generic_wait_for_tasks(
+ struct se_cmd *cmd,
+ int remove_cmd,
+ int session_reinstatement)
+{
+ unsigned long flags;
+
+ if (!(cmd->se_cmd_flags & SCF_SE_LUN_CMD) && !(cmd->se_tmr_req))
+ return;
+
+ spin_lock_irqsave(&T_TASK(cmd)->t_state_lock, flags);
+ /*
+ * If we are already stopped due to an external event (ie: LUN shutdown)
+ * sleep until the connection can have the passed struct se_cmd back.
+ * The T_TASK(cmd)->transport_lun_stopped_sem will be upped by
+ * transport_clear_lun_from_sessions() once the ConfigFS context caller
+ * has completed its operation on the struct se_cmd.
+ */
+ if (atomic_read(&T_TASK(cmd)->transport_lun_stop)) {
+
+ DEBUG_TRANSPORT_S("wait_for_tasks: Stopping"
+ " wait_for_completion(&T_TASK(cmd)transport_lun_fe"
+ "_stop_comp); for ITT: 0x%08x\n",
+ CMD_TFO(cmd)->get_task_tag(cmd));
+ /*
+ * There is a special case for WRITES where a FE exception +
+ * LUN shutdown means ConfigFS context is still sleeping on
+ * transport_lun_stop_comp in transport_lun_wait_for_tasks().
+ * We go ahead and up transport_lun_stop_comp just to be sure
+ * here.
+ */
+ spin_unlock_irqrestore(&T_TASK(cmd)->t_state_lock, flags);
+ complete(&T_TASK(cmd)->transport_lun_stop_comp);
+ wait_for_completion(&T_TASK(cmd)->transport_lun_fe_stop_comp);
+ spin_lock_irqsave(&T_TASK(cmd)->t_state_lock, flags);
+
+ transport_all_task_dev_remove_state(cmd);
+ /*
+ * At this point, the frontend who was the originator of this
+ * struct se_cmd, now owns the structure and can be released through
+ * normal means below.
+ */
+ DEBUG_TRANSPORT_S("wait_for_tasks: Stopped"
+ " wait_for_completion(&T_TASK(cmd)transport_lun_fe_"
+ "stop_comp); for ITT: 0x%08x\n",
+ CMD_TFO(cmd)->get_task_tag(cmd));
+
+ atomic_set(&T_TASK(cmd)->transport_lun_stop, 0);
+ }
+ if (!atomic_read(&T_TASK(cmd)->t_transport_active))
+ goto remove;
+
+ atomic_set(&T_TASK(cmd)->t_transport_stop, 1);
+
+ DEBUG_TRANSPORT_S("wait_for_tasks: Stopping %p ITT: 0x%08x"
+ " i_state: %d, t_state/def_t_state: %d/%d, t_transport_stop"
+ " = TRUE\n", cmd, CMD_TFO(cmd)->get_task_tag(cmd),
+ CMD_TFO(cmd)->get_cmd_state(cmd), cmd->t_state,
+ cmd->deferred_t_state);
+
+ spin_unlock_irqrestore(&T_TASK(cmd)->t_state_lock, flags);
+
+ wake_up_interruptible(&SE_DEV(cmd)->dev_queue_obj->thread_wq);
+
+ wait_for_completion(&T_TASK(cmd)->t_transport_stop_comp);
+
+ spin_lock_irqsave(&T_TASK(cmd)->t_state_lock, flags);
+ atomic_set(&T_TASK(cmd)->t_transport_active, 0);
+ atomic_set(&T_TASK(cmd)->t_transport_stop, 0);
+
+ DEBUG_TRANSPORT_S("wait_for_tasks: Stopped wait_for_compltion("
+ "&T_TASK(cmd)->t_transport_stop_comp) for ITT: 0x%08x\n",
+ CMD_TFO(cmd)->get_task_tag(cmd));
+remove:
+ spin_unlock_irqrestore(&T_TASK(cmd)->t_state_lock, flags);
+ if (!remove_cmd)
+ return;
+
+ transport_generic_free_cmd(cmd, 0, 0, session_reinstatement);
+}
+
+static int transport_get_sense_codes(
+ struct se_cmd *cmd,
+ u8 *asc,
+ u8 *ascq)
+{
+ *asc = cmd->scsi_asc;
+ *ascq = cmd->scsi_ascq;
+
+ return 0;
+}
+
+static int transport_set_sense_codes(
+ struct se_cmd *cmd,
+ u8 asc,
+ u8 ascq)
+{
+ cmd->scsi_asc = asc;
+ cmd->scsi_ascq = ascq;
+
+ return 0;
+}
+
+int transport_send_check_condition_and_sense(
+ struct se_cmd *cmd,
+ u8 reason,
+ int from_transport)
+{
+ unsigned char *buffer = cmd->sense_buffer;
+ unsigned long flags;
+ int offset;
+ u8 asc = 0, ascq = 0;
+
+ spin_lock_irqsave(&T_TASK(cmd)->t_state_lock, flags);
+ if (cmd->se_cmd_flags & SCF_SENT_CHECK_CONDITION) {
+ spin_unlock_irqrestore(&T_TASK(cmd)->t_state_lock, flags);
+ return 0;
+ }
+ cmd->se_cmd_flags |= SCF_SENT_CHECK_CONDITION;
+ spin_unlock_irqrestore(&T_TASK(cmd)->t_state_lock, flags);
+
+ if (!reason && from_transport)
+ goto after_reason;
+
+ if (!from_transport)
+ cmd->se_cmd_flags |= SCF_EMULATED_TASK_SENSE;
+ /*
+ * Data Segment and SenseLength of the fabric response PDU.
+ *
+ * TRANSPORT_SENSE_BUFFER is now set to SCSI_SENSE_BUFFERSIZE
+ * from include/scsi/scsi_cmnd.h
+ */
+ offset = CMD_TFO(cmd)->set_fabric_sense_len(cmd,
+ TRANSPORT_SENSE_BUFFER);
+ /*
+ * Actual SENSE DATA, see SPC-3 7.23.2 SPC_SENSE_KEY_OFFSET uses
+ * SENSE KEY values from include/scsi/scsi.h
+ */
+ switch (reason) {
+ case TCM_NON_EXISTENT_LUN:
+ case TCM_UNSUPPORTED_SCSI_OPCODE:
+ case TCM_SECTOR_COUNT_TOO_MANY:
+ /* CURRENT ERROR */
+ buffer[offset] = 0x70;
+ /* ILLEGAL REQUEST */
+ buffer[offset+SPC_SENSE_KEY_OFFSET] = ILLEGAL_REQUEST;
+ /* INVALID COMMAND OPERATION CODE */
+ buffer[offset+SPC_ASC_KEY_OFFSET] = 0x20;
+ break;
+ case TCM_UNKNOWN_MODE_PAGE:
+ /* CURRENT ERROR */
+ buffer[offset] = 0x70;
+ /* ILLEGAL REQUEST */
+ buffer[offset+SPC_SENSE_KEY_OFFSET] = ILLEGAL_REQUEST;
+ /* INVALID FIELD IN CDB */
+ buffer[offset+SPC_ASC_KEY_OFFSET] = 0x24;
+ break;
+ case TCM_CHECK_CONDITION_ABORT_CMD:
+ /* CURRENT ERROR */
+ buffer[offset] = 0x70;
+ /* ABORTED COMMAND */
+ buffer[offset+SPC_SENSE_KEY_OFFSET] = ABORTED_COMMAND;
+ /* BUS DEVICE RESET FUNCTION OCCURRED */
+ buffer[offset+SPC_ASC_KEY_OFFSET] = 0x29;
+ buffer[offset+SPC_ASCQ_KEY_OFFSET] = 0x03;
+ break;
+ case TCM_INCORRECT_AMOUNT_OF_DATA:
+ /* CURRENT ERROR */
+ buffer[offset] = 0x70;
+ /* ABORTED COMMAND */
+ buffer[offset+SPC_SENSE_KEY_OFFSET] = ABORTED_COMMAND;
+ /* WRITE ERROR */
+ buffer[offset+SPC_ASC_KEY_OFFSET] = 0x0c;
+ /* NOT ENOUGH UNSOLICITED DATA */
+ buffer[offset+SPC_ASCQ_KEY_OFFSET] = 0x0d;
+ break;
+ case TCM_INVALID_CDB_FIELD:
+ /* CURRENT ERROR */
+ buffer[offset] = 0x70;
+ /* ABORTED COMMAND */
+ buffer[offset+SPC_SENSE_KEY_OFFSET] = ABORTED_COMMAND;
+ /* INVALID FIELD IN CDB */
+ buffer[offset+SPC_ASC_KEY_OFFSET] = 0x24;
+ break;
+ case TCM_INVALID_PARAMETER_LIST:
+ /* CURRENT ERROR */
+ buffer[offset] = 0x70;
+ /* ABORTED COMMAND */
+ buffer[offset+SPC_SENSE_KEY_OFFSET] = ABORTED_COMMAND;
+ /* INVALID FIELD IN PARAMETER LIST */
+ buffer[offset+SPC_ASC_KEY_OFFSET] = 0x26;
+ break;
+ case TCM_UNEXPECTED_UNSOLICITED_DATA:
+ /* CURRENT ERROR */
+ buffer[offset] = 0x70;
+ /* ABORTED COMMAND */
+ buffer[offset+SPC_SENSE_KEY_OFFSET] = ABORTED_COMMAND;
+ /* WRITE ERROR */
+ buffer[offset+SPC_ASC_KEY_OFFSET] = 0x0c;
+ /* UNEXPECTED_UNSOLICITED_DATA */
+ buffer[offset+SPC_ASCQ_KEY_OFFSET] = 0x0c;
+ break;
+ case TCM_SERVICE_CRC_ERROR:
+ /* CURRENT ERROR */
+ buffer[offset] = 0x70;
+ /* ABORTED COMMAND */
+ buffer[offset+SPC_SENSE_KEY_OFFSET] = ABORTED_COMMAND;
+ /* PROTOCOL SERVICE CRC ERROR */
+ buffer[offset+SPC_ASC_KEY_OFFSET] = 0x47;
+ /* N/A */
+ buffer[offset+SPC_ASCQ_KEY_OFFSET] = 0x05;
+ break;
+ case TCM_SNACK_REJECTED:
+ /* CURRENT ERROR */
+ buffer[offset] = 0x70;
+ /* ABORTED COMMAND */
+ buffer[offset+SPC_SENSE_KEY_OFFSET] = ABORTED_COMMAND;
+ /* READ ERROR */
+ buffer[offset+SPC_ASC_KEY_OFFSET] = 0x11;
+ /* FAILED RETRANSMISSION REQUEST */
+ buffer[offset+SPC_ASCQ_KEY_OFFSET] = 0x13;
+ break;
+ case TCM_WRITE_PROTECTED:
+ /* CURRENT ERROR */
+ buffer[offset] = 0x70;
+ /* DATA PROTECT */
+ buffer[offset+SPC_SENSE_KEY_OFFSET] = DATA_PROTECT;
+ /* WRITE PROTECTED */
+ buffer[offset+SPC_ASC_KEY_OFFSET] = 0x27;
+ break;
+ case TCM_CHECK_CONDITION_UNIT_ATTENTION:
+ /* CURRENT ERROR */
+ buffer[offset] = 0x70;
+ /* UNIT ATTENTION */
+ buffer[offset+SPC_SENSE_KEY_OFFSET] = UNIT_ATTENTION;
+ core_scsi3_ua_for_check_condition(cmd, &asc, &ascq);
+ buffer[offset+SPC_ASC_KEY_OFFSET] = asc;
+ buffer[offset+SPC_ASCQ_KEY_OFFSET] = ascq;
+ break;
+ case TCM_CHECK_CONDITION_NOT_READY:
+ /* CURRENT ERROR */
+ buffer[offset] = 0x70;
+ /* Not Ready */
+ buffer[offset+SPC_SENSE_KEY_OFFSET] = NOT_READY;
+ transport_get_sense_codes(cmd, &asc, &ascq);
+ buffer[offset+SPC_ASC_KEY_OFFSET] = asc;
+ buffer[offset+SPC_ASCQ_KEY_OFFSET] = ascq;
+ break;
+ case TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE:
+ default:
+ /* CURRENT ERROR */
+ buffer[offset] = 0x70;
+ /* ILLEGAL REQUEST */
+ buffer[offset+SPC_SENSE_KEY_OFFSET] = ILLEGAL_REQUEST;
+ /* LOGICAL UNIT COMMUNICATION FAILURE */
+ buffer[offset+SPC_ASC_KEY_OFFSET] = 0x80;
+ break;
+ }
+ /*
+ * This code uses linux/include/scsi/scsi.h SAM status codes!
+ */
+ cmd->scsi_status = SAM_STAT_CHECK_CONDITION;
+ /*
+ * Automatically padded, this value is encoded in the fabric's
+ * data_length response PDU containing the SCSI defined sense data.
+ */
+ cmd->scsi_sense_length = TRANSPORT_SENSE_BUFFER + offset;
+
+after_reason:
+ CMD_TFO(cmd)->queue_status(cmd);
+ return 0;
+}
+EXPORT_SYMBOL(transport_send_check_condition_and_sense);
+
+int transport_check_aborted_status(struct se_cmd *cmd, int send_status)
+{
+ int ret = 0;
+
+ if (atomic_read(&T_TASK(cmd)->t_transport_aborted) != 0) {
+ if (!(send_status) ||
+ (cmd->se_cmd_flags & SCF_SENT_DELAYED_TAS))
+ return 1;
+#if 0
+ printk(KERN_INFO "Sending delayed SAM_STAT_TASK_ABORTED"
+ " status for CDB: 0x%02x ITT: 0x%08x\n",
+ T_TASK(cmd)->t_task_cdb[0],
+ CMD_TFO(cmd)->get_task_tag(cmd));
+#endif
+ cmd->se_cmd_flags |= SCF_SENT_DELAYED_TAS;
+ CMD_TFO(cmd)->queue_status(cmd);
+ ret = 1;
+ }
+ return ret;
+}
+EXPORT_SYMBOL(transport_check_aborted_status);
+
+void transport_send_task_abort(struct se_cmd *cmd)
+{
+ /*
+ * If there are still expected incoming fabric WRITEs, we wait
+ * until until they have completed before sending a TASK_ABORTED
+ * response. This response with TASK_ABORTED status will be
+ * queued back to fabric module by transport_check_aborted_status().
+ */
+ if (cmd->data_direction == DMA_TO_DEVICE) {
+ if (CMD_TFO(cmd)->write_pending_status(cmd) != 0) {
+ atomic_inc(&T_TASK(cmd)->t_transport_aborted);
+ smp_mb__after_atomic_inc();
+ cmd->scsi_status = SAM_STAT_TASK_ABORTED;
+ transport_new_cmd_failure(cmd);
+ return;
+ }
+ }
+ cmd->scsi_status = SAM_STAT_TASK_ABORTED;
+#if 0
+ printk(KERN_INFO "Setting SAM_STAT_TASK_ABORTED status for CDB: 0x%02x,"
+ " ITT: 0x%08x\n", T_TASK(cmd)->t_task_cdb[0],
+ CMD_TFO(cmd)->get_task_tag(cmd));
+#endif
+ CMD_TFO(cmd)->queue_status(cmd);
+}
+
+/* transport_generic_do_tmr():
+ *
+ *
+ */
+int transport_generic_do_tmr(struct se_cmd *cmd)
+{
+ struct se_cmd *ref_cmd;
+ struct se_device *dev = SE_DEV(cmd);
+ struct se_tmr_req *tmr = cmd->se_tmr_req;
+ int ret;
+
+ switch (tmr->function) {
+ case ABORT_TASK:
+ ref_cmd = tmr->ref_cmd;
+ tmr->response = TMR_FUNCTION_REJECTED;
+ break;
+ case ABORT_TASK_SET:
+ case CLEAR_ACA:
+ case CLEAR_TASK_SET:
+ tmr->response = TMR_TASK_MGMT_FUNCTION_NOT_SUPPORTED;
+ break;
+ case LUN_RESET:
+ ret = core_tmr_lun_reset(dev, tmr, NULL, NULL);
+ tmr->response = (!ret) ? TMR_FUNCTION_COMPLETE :
+ TMR_FUNCTION_REJECTED;
+ break;
+#if 0
+ case TARGET_WARM_RESET:
+ transport_generic_host_reset(dev->se_hba);
+ tmr->response = TMR_FUNCTION_REJECTED;
+ break;
+ case TARGET_COLD_RESET:
+ transport_generic_host_reset(dev->se_hba);
+ transport_generic_cold_reset(dev->se_hba);
+ tmr->response = TMR_FUNCTION_REJECTED;
+ break;
+#endif
+ default:
+ printk(KERN_ERR "Uknown TMR function: 0x%02x.\n",
+ tmr->function);
+ tmr->response = TMR_FUNCTION_REJECTED;
+ break;
+ }
+
+ cmd->t_state = TRANSPORT_ISTATE_PROCESSING;
+ CMD_TFO(cmd)->queue_tm_rsp(cmd);
+
+ transport_cmd_check_stop(cmd, 2, 0);
+ return 0;
+}
+
+/*
+ * Called with spin_lock_irq(&dev->execute_task_lock); held
+ *
+ */
+static struct se_task *
+transport_get_task_from_state_list(struct se_device *dev)
+{
+ struct se_task *task;
+
+ if (list_empty(&dev->state_task_list))
+ return NULL;
+
+ list_for_each_entry(task, &dev->state_task_list, t_state_list)
+ break;
+
+ list_del(&task->t_state_list);
+ atomic_set(&task->task_state_active, 0);
+
+ return task;
+}
+
+static void transport_processing_shutdown(struct se_device *dev)
+{
+ struct se_cmd *cmd;
+ struct se_queue_req *qr;
+ struct se_task *task;
+ u8 state;
+ unsigned long flags;
+ /*
+ * Empty the struct se_device's struct se_task state list.
+ */
+ spin_lock_irqsave(&dev->execute_task_lock, flags);
+ while ((task = transport_get_task_from_state_list(dev))) {
+ if (!(TASK_CMD(task))) {
+ printk(KERN_ERR "TASK_CMD(task) is NULL!\n");
+ continue;
+ }
+ cmd = TASK_CMD(task);
+
+ if (!T_TASK(cmd)) {
+ printk(KERN_ERR "T_TASK(cmd) is NULL for task: %p cmd:"
+ " %p ITT: 0x%08x\n", task, cmd,
+ CMD_TFO(cmd)->get_task_tag(cmd));
+ continue;
+ }
+ spin_unlock_irqrestore(&dev->execute_task_lock, flags);
+
+ spin_lock_irqsave(&T_TASK(cmd)->t_state_lock, flags);
+
+ DEBUG_DO("PT: cmd: %p task: %p ITT/CmdSN: 0x%08x/0x%08x,"
+ " i_state/def_i_state: %d/%d, t_state/def_t_state:"
+ " %d/%d cdb: 0x%02x\n", cmd, task,
+ CMD_TFO(cmd)->get_task_tag(cmd), cmd->cmd_sn,
+ CMD_TFO(cmd)->get_cmd_state(cmd), cmd->deferred_i_state,
+ cmd->t_state, cmd->deferred_t_state,
+ T_TASK(cmd)->t_task_cdb[0]);
+ DEBUG_DO("PT: ITT[0x%08x] - t_task_cdbs: %d t_task_cdbs_left:"
+ " %d t_task_cdbs_sent: %d -- t_transport_active: %d"
+ " t_transport_stop: %d t_transport_sent: %d\n",
+ CMD_TFO(cmd)->get_task_tag(cmd),
+ T_TASK(cmd)->t_task_cdbs,
+ atomic_read(&T_TASK(cmd)->t_task_cdbs_left),
+ atomic_read(&T_TASK(cmd)->t_task_cdbs_sent),
+ atomic_read(&T_TASK(cmd)->t_transport_active),
+ atomic_read(&T_TASK(cmd)->t_transport_stop),
+ atomic_read(&T_TASK(cmd)->t_transport_sent));
+
+ if (atomic_read(&task->task_active)) {
+ atomic_set(&task->task_stop, 1);
+ spin_unlock_irqrestore(
+ &T_TASK(cmd)->t_state_lock, flags);
+
+ DEBUG_DO("Waiting for task: %p to shutdown for dev:"
+ " %p\n", task, dev);
+ wait_for_completion(&task->task_stop_comp);
+ DEBUG_DO("Completed task: %p shutdown for dev: %p\n",
+ task, dev);
+
+ spin_lock_irqsave(&T_TASK(cmd)->t_state_lock, flags);
+ atomic_dec(&T_TASK(cmd)->t_task_cdbs_left);
+
+ atomic_set(&task->task_active, 0);
+ atomic_set(&task->task_stop, 0);
+ }
+ __transport_stop_task_timer(task, &flags);
+
+ if (!(atomic_dec_and_test(&T_TASK(cmd)->t_task_cdbs_ex_left))) {
+ spin_unlock_irqrestore(
+ &T_TASK(cmd)->t_state_lock, flags);
+
+ DEBUG_DO("Skipping task: %p, dev: %p for"
+ " t_task_cdbs_ex_left: %d\n", task, dev,
+ atomic_read(&T_TASK(cmd)->t_task_cdbs_ex_left));
+
+ spin_lock_irqsave(&dev->execute_task_lock, flags);
+ continue;
+ }
+
+ if (atomic_read(&T_TASK(cmd)->t_transport_active)) {
+ DEBUG_DO("got t_transport_active = 1 for task: %p, dev:"
+ " %p\n", task, dev);
+
+ if (atomic_read(&T_TASK(cmd)->t_fe_count)) {
+ spin_unlock_irqrestore(
+ &T_TASK(cmd)->t_state_lock, flags);
+ transport_send_check_condition_and_sense(
+ cmd, TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE,
+ 0);
+ transport_remove_cmd_from_queue(cmd,
+ SE_DEV(cmd)->dev_queue_obj);
+
+ transport_lun_remove_cmd(cmd);
+ transport_cmd_check_stop(cmd, 1, 0);
+ } else {
+ spin_unlock_irqrestore(
+ &T_TASK(cmd)->t_state_lock, flags);
+
+ transport_remove_cmd_from_queue(cmd,
+ SE_DEV(cmd)->dev_queue_obj);
+
+ transport_lun_remove_cmd(cmd);
+
+ if (transport_cmd_check_stop(cmd, 1, 0))
+ transport_generic_remove(cmd, 0, 0);
+ }
+
+ spin_lock_irqsave(&dev->execute_task_lock, flags);
+ continue;
+ }
+ DEBUG_DO("Got t_transport_active = 0 for task: %p, dev: %p\n",
+ task, dev);
+
+ if (atomic_read(&T_TASK(cmd)->t_fe_count)) {
+ spin_unlock_irqrestore(
+ &T_TASK(cmd)->t_state_lock, flags);
+ transport_send_check_condition_and_sense(cmd,
+ TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE, 0);
+ transport_remove_cmd_from_queue(cmd,
+ SE_DEV(cmd)->dev_queue_obj);
+
+ transport_lun_remove_cmd(cmd);
+ transport_cmd_check_stop(cmd, 1, 0);
+ } else {
+ spin_unlock_irqrestore(
+ &T_TASK(cmd)->t_state_lock, flags);
+
+ transport_remove_cmd_from_queue(cmd,
+ SE_DEV(cmd)->dev_queue_obj);
+ transport_lun_remove_cmd(cmd);
+
+ if (transport_cmd_check_stop(cmd, 1, 0))
+ transport_generic_remove(cmd, 0, 0);
+ }
+
+ spin_lock_irqsave(&dev->execute_task_lock, flags);
+ }
+ spin_unlock_irqrestore(&dev->execute_task_lock, flags);
+ /*
+ * Empty the struct se_device's struct se_cmd list.
+ */
+ spin_lock_irqsave(&dev->dev_queue_obj->cmd_queue_lock, flags);
+ while ((qr = __transport_get_qr_from_queue(dev->dev_queue_obj))) {
+ spin_unlock_irqrestore(
+ &dev->dev_queue_obj->cmd_queue_lock, flags);
+ cmd = (struct se_cmd *)qr->cmd;
+ state = qr->state;
+ kfree(qr);
+
+ DEBUG_DO("From Device Queue: cmd: %p t_state: %d\n",
+ cmd, state);
+
+ if (atomic_read(&T_TASK(cmd)->t_fe_count)) {
+ transport_send_check_condition_and_sense(cmd,
+ TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE, 0);
+
+ transport_lun_remove_cmd(cmd);
+ transport_cmd_check_stop(cmd, 1, 0);
+ } else {
+ transport_lun_remove_cmd(cmd);
+ if (transport_cmd_check_stop(cmd, 1, 0))
+ transport_generic_remove(cmd, 0, 0);
+ }
+ spin_lock_irqsave(&dev->dev_queue_obj->cmd_queue_lock, flags);
+ }
+ spin_unlock_irqrestore(&dev->dev_queue_obj->cmd_queue_lock, flags);
+}
+
+/* transport_processing_thread():
+ *
+ *
+ */
+static int transport_processing_thread(void *param)
+{
+ int ret, t_state;
+ struct se_cmd *cmd;
+ struct se_device *dev = (struct se_device *) param;
+ struct se_queue_req *qr;
+
+ set_user_nice(current, -20);
+
+ while (!kthread_should_stop()) {
+ ret = wait_event_interruptible(dev->dev_queue_obj->thread_wq,
+ atomic_read(&dev->dev_queue_obj->queue_cnt) ||
+ kthread_should_stop());
+ if (ret < 0)
+ goto out;
+
+ spin_lock_irq(&dev->dev_status_lock);
+ if (dev->dev_status & TRANSPORT_DEVICE_SHUTDOWN) {
+ spin_unlock_irq(&dev->dev_status_lock);
+ transport_processing_shutdown(dev);
+ continue;
+ }
+ spin_unlock_irq(&dev->dev_status_lock);
+
+get_cmd:
+ __transport_execute_tasks(dev);
+
+ qr = transport_get_qr_from_queue(dev->dev_queue_obj);
+ if (!(qr))
+ continue;
+
+ cmd = (struct se_cmd *)qr->cmd;
+ t_state = qr->state;
+ kfree(qr);
+
+ switch (t_state) {
+ case TRANSPORT_NEW_CMD_MAP:
+ if (!(CMD_TFO(cmd)->new_cmd_map)) {
+ printk(KERN_ERR "CMD_TFO(cmd)->new_cmd_map is"
+ " NULL for TRANSPORT_NEW_CMD_MAP\n");
+ BUG();
+ }
+ ret = CMD_TFO(cmd)->new_cmd_map(cmd);
+ if (ret < 0) {
+ cmd->transport_error_status = ret;
+ transport_generic_request_failure(cmd, NULL,
+ 0, (cmd->data_direction !=
+ DMA_TO_DEVICE));
+ break;
+ }
+ /* Fall through */
+ case TRANSPORT_NEW_CMD:
+ ret = transport_generic_new_cmd(cmd);
+ if (ret < 0) {
+ cmd->transport_error_status = ret;
+ transport_generic_request_failure(cmd, NULL,
+ 0, (cmd->data_direction !=
+ DMA_TO_DEVICE));
+ }
+ break;
+ case TRANSPORT_PROCESS_WRITE:
+ transport_generic_process_write(cmd);
+ break;
+ case TRANSPORT_COMPLETE_OK:
+ transport_stop_all_task_timers(cmd);
+ transport_generic_complete_ok(cmd);
+ break;
+ case TRANSPORT_REMOVE:
+ transport_generic_remove(cmd, 1, 0);
+ break;
+ case TRANSPORT_PROCESS_TMR:
+ transport_generic_do_tmr(cmd);
+ break;
+ case TRANSPORT_COMPLETE_FAILURE:
+ transport_generic_request_failure(cmd, NULL, 1, 1);
+ break;
+ case TRANSPORT_COMPLETE_TIMEOUT:
+ transport_stop_all_task_timers(cmd);
+ transport_generic_request_timeout(cmd);
+ break;
+ default:
+ printk(KERN_ERR "Unknown t_state: %d deferred_t_state:"
+ " %d for ITT: 0x%08x i_state: %d on SE LUN:"
+ " %u\n", t_state, cmd->deferred_t_state,
+ CMD_TFO(cmd)->get_task_tag(cmd),
+ CMD_TFO(cmd)->get_cmd_state(cmd),
+ SE_LUN(cmd)->unpacked_lun);
+ BUG();
+ }
+
+ goto get_cmd;
+ }
+
+out:
+ transport_release_all_cmds(dev);
+ dev->process_thread = NULL;
+ return 0;
+}
diff --git a/include/target/target_core_transport.h b/include/target/target_core_transport.h
new file mode 100644
index 0000000..7f59308
--- /dev/null
+++ b/include/target/target_core_transport.h
@@ -0,0 +1,350 @@
+#ifndef TARGET_CORE_TRANSPORT_H
+#define TARGET_CORE_TRANSPORT_H
+
+#define TARGET_CORE_VERSION TARGET_CORE_MOD_VERSION
+
+/* Attempts before moving from SHORT to LONG */
+#define PYX_TRANSPORT_WINDOW_CLOSED_THRESHOLD 3
+#define PYX_TRANSPORT_WINDOW_CLOSED_WAIT_SHORT 3 /* In milliseconds */
+#define PYX_TRANSPORT_WINDOW_CLOSED_WAIT_LONG 10 /* In milliseconds */
+
+#define PYX_TRANSPORT_STATUS_INTERVAL 5 /* In seconds */
+
+#define PYX_TRANSPORT_SENT_TO_TRANSPORT 0
+#define PYX_TRANSPORT_WRITE_PENDING 1
+
+#define PYX_TRANSPORT_UNKNOWN_SAM_OPCODE -1
+#define PYX_TRANSPORT_HBA_QUEUE_FULL -2
+#define PYX_TRANSPORT_REQ_TOO_MANY_SECTORS -3
+#define PYX_TRANSPORT_OUT_OF_MEMORY_RESOURCES -4
+#define PYX_TRANSPORT_INVALID_CDB_FIELD -5
+#define PYX_TRANSPORT_INVALID_PARAMETER_LIST -6
+#define PYX_TRANSPORT_LU_COMM_FAILURE -7
+#define PYX_TRANSPORT_UNKNOWN_MODE_PAGE -8
+#define PYX_TRANSPORT_WRITE_PROTECTED -9
+#define PYX_TRANSPORT_TASK_TIMEOUT -10
+#define PYX_TRANSPORT_RESERVATION_CONFLICT -11
+#define PYX_TRANSPORT_ILLEGAL_REQUEST -12
+#define PYX_TRANSPORT_USE_SENSE_REASON -13
+
+#ifndef SAM_STAT_RESERVATION_CONFLICT
+#define SAM_STAT_RESERVATION_CONFLICT 0x18
+#endif
+
+#define TRANSPORT_PLUGIN_FREE 0
+#define TRANSPORT_PLUGIN_REGISTERED 1
+
+#define TRANSPORT_PLUGIN_PHBA_PDEV 1
+#define TRANSPORT_PLUGIN_VHBA_PDEV 2
+#define TRANSPORT_PLUGIN_VHBA_VDEV 3
+
+/* For SE OBJ Plugins, in seconds */
+#define TRANSPORT_TIMEOUT_TUR 10
+#define TRANSPORT_TIMEOUT_TYPE_DISK 60
+#define TRANSPORT_TIMEOUT_TYPE_ROM 120
+#define TRANSPORT_TIMEOUT_TYPE_TAPE 600
+#define TRANSPORT_TIMEOUT_TYPE_OTHER 300
+
+/* For se_task->task_state_flags */
+#define TSF_EXCEPTION_CLEARED 0x01
+
+/*
+ * struct se_subsystem_dev->su_dev_flags
+*/
+#define SDF_FIRMWARE_VPD_UNIT_SERIAL 0x00000001
+#define SDF_EMULATED_VPD_UNIT_SERIAL 0x00000002
+#define SDF_USING_UDEV_PATH 0x00000004
+#define SDF_USING_ALIAS 0x00000008
+
+/*
+ * struct se_device->dev_flags
+ */
+#define DF_READ_ONLY 0x00000001
+#define DF_SPC2_RESERVATIONS 0x00000002
+#define DF_SPC2_RESERVATIONS_WITH_ISID 0x00000004
+
+/* struct se_dev_attrib sanity values */
+/* 10 Minutes */
+#define DA_TASK_TIMEOUT_MAX 600
+/* Default max_unmap_lba_count */
+#define DA_MAX_UNMAP_LBA_COUNT 0
+/* Default max_unmap_block_desc_count */
+#define DA_MAX_UNMAP_BLOCK_DESC_COUNT 0
+/* Default unmap_granularity */
+#define DA_UNMAP_GRANULARITY_DEFAULT 0
+/* Default unmap_granularity_alignment */
+#define DA_UNMAP_GRANULARITY_ALIGNMENT_DEFAULT 0
+/* Emulation for Direct Page Out */
+#define DA_EMULATE_DPO 0
+/* Emulation for Forced Unit Access WRITEs */
+#define DA_EMULATE_FUA_WRITE 1
+/* Emulation for Forced Unit Access READs */
+#define DA_EMULATE_FUA_READ 0
+/* Emulation for WriteCache and SYNCHRONIZE_CACHE */
+#define DA_EMULATE_WRITE_CACHE 0
+/* Emulation for UNIT ATTENTION Interlock Control */
+#define DA_EMULATE_UA_INTLLCK_CTRL 0
+/* Emulation for TASK_ABORTED status (TAS) by default */
+#define DA_EMULATE_TAS 1
+/* Emulation for Thin Provisioning UNMAP using block/blk-lib.c:blkdev_issue_discard() */
+#define DA_EMULATE_TPU 0
+/*
+ * Emulation for Thin Provisioning WRITE_SAME w/ UNMAP=1 bit using
+ * block/blk-lib.c:blkdev_issue_discard()
+ */
+#define DA_EMULATE_TPWS 0
+/* No Emulation for PSCSI by default */
+#define DA_EMULATE_RESERVATIONS 0
+/* No Emulation for PSCSI by default */
+#define DA_EMULATE_ALUA 0
+/* Enforce SCSI Initiator Port TransportID with 'ISID' for PR */
+#define DA_ENFORCE_PR_ISIDS 1
+#define DA_STATUS_MAX_SECTORS_MIN 16
+#define DA_STATUS_MAX_SECTORS_MAX 8192
+
+#define SE_MODE_PAGE_BUF 512
+
+#define MOD_MAX_SECTORS(ms, bs) (ms % (PAGE_SIZE / bs))
+
+struct se_mem;
+struct se_subsystem_api;
+
+extern int init_se_global(void);
+extern void release_se_global(void);
+extern void transport_init_queue_obj(struct se_queue_obj *);
+extern int transport_subsystem_check_init(void);
+extern int transport_subsystem_register(struct se_subsystem_api *);
+extern void transport_subsystem_release(struct se_subsystem_api *);
+extern void transport_load_plugins(void);
+extern struct se_session *transport_init_session(void);
+extern void __transport_register_session(struct se_portal_group *,
+ struct se_node_acl *,
+ struct se_session *, void *);
+extern void transport_register_session(struct se_portal_group *,
+ struct se_node_acl *,
+ struct se_session *, void *);
+extern void transport_free_session(struct se_session *);
+extern void transport_deregister_session_configfs(struct se_session *);
+extern void transport_deregister_session(struct se_session *);
+extern void transport_cmd_finish_abort(struct se_cmd *, int);
+extern void transport_cmd_finish_abort_tmr(struct se_cmd *);
+extern void transport_complete_sync_cache(struct se_cmd *, int);
+extern void transport_complete_task(struct se_task *, int);
+extern void transport_add_task_to_execute_queue(struct se_task *,
+ struct se_task *,
+ struct se_device *);
+unsigned char *transport_dump_cmd_direction(struct se_cmd *);
+extern void transport_dump_dev_state(struct se_device *, char *, int *);
+extern void transport_dump_dev_info(struct se_device *, struct se_lun *,
+ unsigned long long, char *, int *);
+extern void transport_dump_vpd_proto_id(struct t10_vpd *,
+ unsigned char *, int);
+extern void transport_set_vpd_proto_id(struct t10_vpd *, unsigned char *);
+extern int transport_dump_vpd_assoc(struct t10_vpd *,
+ unsigned char *, int);
+extern int transport_set_vpd_assoc(struct t10_vpd *, unsigned char *);
+extern int transport_dump_vpd_ident_type(struct t10_vpd *,
+ unsigned char *, int);
+extern int transport_set_vpd_ident_type(struct t10_vpd *, unsigned char *);
+extern int transport_dump_vpd_ident(struct t10_vpd *,
+ unsigned char *, int);
+extern int transport_set_vpd_ident(struct t10_vpd *, unsigned char *);
+extern struct se_device *transport_add_device_to_core_hba(struct se_hba *,
+ struct se_subsystem_api *,
+ struct se_subsystem_dev *, u32,
+ void *, struct se_dev_limits *,
+ const char *, const char *);
+extern void transport_device_setup_cmd(struct se_cmd *);
+extern void transport_init_se_cmd(struct se_cmd *,
+ struct target_core_fabric_ops *,
+ struct se_session *, u32, int, int,
+ unsigned char *);
+extern void transport_free_se_cmd(struct se_cmd *);
+extern int transport_generic_allocate_tasks(struct se_cmd *, unsigned char *);
+extern int transport_generic_handle_cdb(struct se_cmd *);
+extern int transport_generic_handle_cdb_map(struct se_cmd *);
+extern int transport_generic_handle_data(struct se_cmd *);
+extern int transport_generic_handle_tmr(struct se_cmd *);
+extern void __transport_stop_task_timer(struct se_task *, unsigned long *);
+extern unsigned char transport_asciihex_to_binaryhex(unsigned char val[2]);
+extern int transport_generic_map_mem_to_cmd(struct se_cmd *cmd, struct scatterlist *, u32,
+ struct scatterlist *, u32);
+extern int transport_clear_lun_from_sessions(struct se_lun *);
+extern int transport_check_aborted_status(struct se_cmd *, int);
+extern int transport_send_check_condition_and_sense(struct se_cmd *, u8, int);
+extern void transport_send_task_abort(struct se_cmd *);
+extern void transport_release_cmd_to_pool(struct se_cmd *);
+extern void transport_generic_free_cmd(struct se_cmd *, int, int, int);
+extern void transport_generic_wait_for_cmds(struct se_cmd *, int);
+extern u32 transport_calc_sg_num(struct se_task *, struct se_mem *, u32);
+extern int transport_map_mem_to_sg(struct se_task *, struct list_head *,
+ void *, struct se_mem *,
+ struct se_mem **, u32 *, u32 *);
+extern void transport_do_task_sg_chain(struct se_cmd *);
+extern void transport_generic_process_write(struct se_cmd *);
+extern int transport_generic_do_tmr(struct se_cmd *);
+/* From target_core_alua.c */
+extern int core_alua_check_nonop_delay(struct se_cmd *);
+
+/*
+ * Each se_transport_task_t can have N number of possible struct se_task's
+ * for the storage transport(s) to possibly execute.
+ * Used primarily for splitting up CDBs that exceed the physical storage
+ * HBA's maximum sector count per task.
+ */
+struct se_mem {
+ struct page *se_page;
+ u32 se_len;
+ u32 se_off;
+ struct list_head se_list;
+} ____cacheline_aligned;
+
+/*
+ * Each type of disk transport supported MUST have a template defined
+ * within its .h file.
+ */
+struct se_subsystem_api {
+ /*
+ * The Name. :-)
+ */
+ char name[16];
+ /*
+ * Transport Type.
+ */
+ u8 transport_type;
+ /*
+ * struct module for struct se_hba references
+ */
+ struct module *owner;
+ /*
+ * Used for global se_subsystem_api list_head
+ */
+ struct list_head sub_api_list;
+ /*
+ * For SCF_SCSI_NON_DATA_CDB
+ */
+ int (*cdb_none)(struct se_task *);
+ /*
+ * For SCF_SCSI_CONTROL_NONSG_IO_CDB
+ */
+ int (*map_task_non_SG)(struct se_task *);
+ /*
+ * For SCF_SCSI_DATA_SG_IO_CDB and SCF_SCSI_CONTROL_SG_IO_CDB
+ */
+ int (*map_task_SG)(struct se_task *);
+ /*
+ * attach_hba():
+ */
+ int (*attach_hba)(struct se_hba *, u32);
+ /*
+ * detach_hba():
+ */
+ void (*detach_hba)(struct se_hba *);
+ /*
+ * pmode_hba(): Used for TCM/pSCSI subsystem plugin HBA ->
+ * Linux/SCSI struct Scsi_Host passthrough
+ */
+ int (*pmode_enable_hba)(struct se_hba *, unsigned long);
+ /*
+ * allocate_virtdevice():
+ */
+ void *(*allocate_virtdevice)(struct se_hba *, const char *);
+ /*
+ * create_virtdevice(): Only for Virtual HBAs
+ */
+ struct se_device *(*create_virtdevice)(struct se_hba *,
+ struct se_subsystem_dev *, void *);
+ /*
+ * free_device():
+ */
+ void (*free_device)(void *);
+
+ /*
+ * dpo_emulated():
+ */
+ int (*dpo_emulated)(struct se_device *);
+ /*
+ * fua_write_emulated():
+ */
+ int (*fua_write_emulated)(struct se_device *);
+ /*
+ * fua_read_emulated():
+ */
+ int (*fua_read_emulated)(struct se_device *);
+ /*
+ * write_cache_emulated():
+ */
+ int (*write_cache_emulated)(struct se_device *);
+ /*
+ * transport_complete():
+ *
+ * Use transport_generic_complete() for majority of DAS transport
+ * drivers. Provided out of convenience.
+ */
+ int (*transport_complete)(struct se_task *task);
+ struct se_task *(*alloc_task)(struct se_cmd *);
+ /*
+ * do_task():
+ */
+ int (*do_task)(struct se_task *);
+ /*
+ * Used by virtual subsystem plugins IBLOCK and FILEIO to emulate
+ * UNMAP and WRITE_SAME_* w/ UNMAP=1 <-> Linux/Block Discard
+ */
+ int (*do_discard)(struct se_device *, sector_t, u32);
+ /*
+ * Used by virtual subsystem plugins IBLOCK and FILEIO to emulate
+ * SYNCHRONIZE_CACHE_* <-> Linux/Block blkdev_issue_flush()
+ */
+ void (*do_sync_cache)(struct se_task *);
+ /*
+ * free_task():
+ */
+ void (*free_task)(struct se_task *);
+ /*
+ * check_configfs_dev_params():
+ */
+ ssize_t (*check_configfs_dev_params)(struct se_hba *, struct se_subsystem_dev *);
+ /*
+ * set_configfs_dev_params():
+ */
+ ssize_t (*set_configfs_dev_params)(struct se_hba *, struct se_subsystem_dev *,
+ const char *, ssize_t);
+ /*
+ * show_configfs_dev_params():
+ */
+ ssize_t (*show_configfs_dev_params)(struct se_hba *, struct se_subsystem_dev *,
+ char *);
+ /*
+ * get_cdb():
+ */
+ unsigned char *(*get_cdb)(struct se_task *);
+ /*
+ * get_device_rev():
+ */
+ u32 (*get_device_rev)(struct se_device *);
+ /*
+ * get_device_type():
+ */
+ u32 (*get_device_type)(struct se_device *);
+ /*
+ * Get the sector_t from a subsystem backstore..
+ */
+ sector_t (*get_blocks)(struct se_device *);
+ /*
+ * do_se_mem_map():
+ */
+ int (*do_se_mem_map)(struct se_task *, struct list_head *, void *,
+ struct se_mem *, struct se_mem **, u32 *, u32 *);
+ /*
+ * get_sense_buffer():
+ */
+ unsigned char *(*get_sense_buffer)(struct se_task *);
+} ____cacheline_aligned;
+
+#define TRANSPORT(dev) ((dev)->transport)
+#define HBA_TRANSPORT(hba) ((hba)->transport)
+
+extern struct se_global *se_global;
+
+#endif /* TARGET_CORE_TRANSPORT_H */
--
1.7.3.4
^ permalink raw reply related [flat|nested] 22+ messages in thread* [PATCH v2 02f/03] target: Add HBA core infrastructure
2010-12-17 21:11 [PATCH v2 00/03] target: Initial merge of v4.0.0-rc6 for .38 Nicholas A. Bellinger
` (5 preceding siblings ...)
2010-12-17 21:11 ` [PATCH v2 02e/03] target: Add fabric and subsystem transport engine core Nicholas A. Bellinger
@ 2010-12-17 21:11 ` Nicholas A. Bellinger
2010-12-17 21:11 ` [PATCH v2 02g/03] target: Add device " Nicholas A. Bellinger
` (13 subsequent siblings)
20 siblings, 0 replies; 22+ messages in thread
From: Nicholas A. Bellinger @ 2010-12-17 21:11 UTC (permalink / raw)
To: linux-scsi, James Bottomley; +Cc: Nicholas Bellinger
From: Nicholas Bellinger <nab@linux-iscsi.org>
This patch adds the core struct se_hba functionality that is used internally by
target_core_mod to group the same subsystem storage objects types until a single
/sys/kernel/config/target/core/$HBA directory. The HBA code supports boths
physical storage objects (from Linux/SCSI) and virtual storage objects (from Linux/BLOCK,
Linux/VFS, RAMDISK)
Signed-off-by: Nicholas A. Bellinger <nab@linux-iscsi.org>
---
drivers/target/target_core_hba.c | 185 ++++++++++++++++++++++++++++++++++++++
drivers/target/target_core_hba.h | 7 ++
2 files changed, 192 insertions(+), 0 deletions(-)
create mode 100644 drivers/target/target_core_hba.c
create mode 100644 drivers/target/target_core_hba.h
diff --git a/drivers/target/target_core_hba.c b/drivers/target/target_core_hba.c
new file mode 100644
index 0000000..4bbe820
--- /dev/null
+++ b/drivers/target/target_core_hba.c
@@ -0,0 +1,185 @@
+/*******************************************************************************
+ * Filename: target_core_hba.c
+ *
+ * This file copntains the iSCSI HBA Transport related functions.
+ *
+ * Copyright (c) 2003, 2004, 2005 PyX Technologies, Inc.
+ * Copyright (c) 2005, 2006, 2007 SBE, Inc.
+ * Copyright (c) 2007-2010 Rising Tide Systems
+ * Copyright (c) 2008-2010 Linux-iSCSI.org
+ *
+ * Nicholas A. Bellinger <nab@kernel.org>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+ *
+ ******************************************************************************/
+
+#include <linux/net.h>
+#include <linux/string.h>
+#include <linux/timer.h>
+#include <linux/slab.h>
+#include <linux/spinlock.h>
+#include <linux/smp_lock.h>
+#include <linux/in.h>
+#include <net/sock.h>
+#include <net/tcp.h>
+
+#include <target/target_core_base.h>
+#include <target/target_core_device.h>
+#include <target/target_core_device.h>
+#include <target/target_core_tpg.h>
+#include <target/target_core_transport.h>
+
+#include "target_core_hba.h"
+
+static LIST_HEAD(subsystem_list);
+static DEFINE_MUTEX(subsystem_mutex);
+
+int transport_subsystem_register(struct se_subsystem_api *sub_api)
+{
+ struct se_subsystem_api *s;
+
+ INIT_LIST_HEAD(&sub_api->sub_api_list);
+
+ mutex_lock(&subsystem_mutex);
+ list_for_each_entry(s, &subsystem_list, sub_api_list) {
+ if (!(strcmp(s->name, sub_api->name))) {
+ printk(KERN_ERR "%p is already registered with"
+ " duplicate name %s, unable to process"
+ " request\n", s, s->name);
+ mutex_unlock(&subsystem_mutex);
+ return -EEXIST;
+ }
+ }
+ list_add_tail(&sub_api->sub_api_list, &subsystem_list);
+ mutex_unlock(&subsystem_mutex);
+
+ printk(KERN_INFO "TCM: Registered subsystem plugin: %s struct module:"
+ " %p\n", sub_api->name, sub_api->owner);
+ return 0;
+}
+EXPORT_SYMBOL(transport_subsystem_register);
+
+void transport_subsystem_release(struct se_subsystem_api *sub_api)
+{
+ mutex_lock(&subsystem_mutex);
+ list_del(&sub_api->sub_api_list);
+ mutex_unlock(&subsystem_mutex);
+}
+EXPORT_SYMBOL(transport_subsystem_release);
+
+static struct se_subsystem_api *core_get_backend(const char *sub_name)
+{
+ struct se_subsystem_api *s;
+
+ mutex_lock(&subsystem_mutex);
+ list_for_each_entry(s, &subsystem_list, sub_api_list) {
+ if (!strcmp(s->name, sub_name))
+ goto found;
+ }
+ mutex_unlock(&subsystem_mutex);
+ return NULL;
+found:
+ if (s->owner && !try_module_get(s->owner))
+ s = NULL;
+ mutex_unlock(&subsystem_mutex);
+ return s;
+}
+
+struct se_hba *
+core_alloc_hba(const char *plugin_name, u32 plugin_dep_id, u32 hba_flags)
+{
+ struct se_hba *hba;
+ int ret = 0;
+
+ hba = kzalloc(sizeof(*hba), GFP_KERNEL);
+ if (!hba) {
+ printk(KERN_ERR "Unable to allocate struct se_hba\n");
+ return ERR_PTR(-ENOMEM);
+ }
+
+ INIT_LIST_HEAD(&hba->hba_dev_list);
+ spin_lock_init(&hba->device_lock);
+ spin_lock_init(&hba->hba_queue_lock);
+ mutex_init(&hba->hba_access_mutex);
+
+ hba->hba_index = scsi_get_new_index(SCSI_INST_INDEX);
+ hba->hba_flags |= hba_flags;
+
+ atomic_set(&hba->max_queue_depth, 0);
+ atomic_set(&hba->left_queue_depth, 0);
+
+ hba->transport = core_get_backend(plugin_name);
+ if (!hba->transport) {
+ ret = -EINVAL;
+ goto out_free_hba;
+ }
+
+ ret = hba->transport->attach_hba(hba, plugin_dep_id);
+ if (ret < 0)
+ goto out_module_put;
+
+ spin_lock(&se_global->hba_lock);
+ hba->hba_id = se_global->g_hba_id_counter++;
+ list_add_tail(&hba->hba_list, &se_global->g_hba_list);
+ spin_unlock(&se_global->hba_lock);
+
+ printk(KERN_INFO "CORE_HBA[%d] - Attached HBA to Generic Target"
+ " Core\n", hba->hba_id);
+
+ return hba;
+
+out_module_put:
+ if (hba->transport->owner)
+ module_put(hba->transport->owner);
+ hba->transport = NULL;
+out_free_hba:
+ kfree(hba);
+ return ERR_PTR(ret);
+}
+
+int
+core_delete_hba(struct se_hba *hba)
+{
+ struct se_device *dev, *dev_tmp;
+
+ spin_lock(&hba->device_lock);
+ list_for_each_entry_safe(dev, dev_tmp, &hba->hba_dev_list, dev_list) {
+
+ se_clear_dev_ports(dev);
+ spin_unlock(&hba->device_lock);
+
+ se_release_device_for_hba(dev);
+
+ spin_lock(&hba->device_lock);
+ }
+ spin_unlock(&hba->device_lock);
+
+ hba->transport->detach_hba(hba);
+
+ spin_lock(&se_global->hba_lock);
+ list_del(&hba->hba_list);
+ spin_unlock(&se_global->hba_lock);
+
+ printk(KERN_INFO "CORE_HBA[%d] - Detached HBA from Generic Target"
+ " Core\n", hba->hba_id);
+
+ if (hba->transport->owner)
+ module_put(hba->transport->owner);
+
+ hba->transport = NULL;
+ kfree(hba);
+ return 0;
+}
diff --git a/drivers/target/target_core_hba.h b/drivers/target/target_core_hba.h
new file mode 100644
index 0000000..bb0fea5
--- /dev/null
+++ b/drivers/target/target_core_hba.h
@@ -0,0 +1,7 @@
+#ifndef TARGET_CORE_HBA_H
+#define TARGET_CORE_HBA_H
+
+extern struct se_hba *core_alloc_hba(const char *, u32, u32);
+extern int core_delete_hba(struct se_hba *);
+
+#endif /* TARGET_CORE_HBA_H */
--
1.7.3.4
^ permalink raw reply related [flat|nested] 22+ messages in thread* [PATCH v2 02g/03] target: Add device core infrastructure
2010-12-17 21:11 [PATCH v2 00/03] target: Initial merge of v4.0.0-rc6 for .38 Nicholas A. Bellinger
` (6 preceding siblings ...)
2010-12-17 21:11 ` [PATCH v2 02f/03] target: Add HBA core infrastructure Nicholas A. Bellinger
@ 2010-12-17 21:11 ` Nicholas A. Bellinger
2010-12-17 21:11 ` [PATCH v2 02h/03] target: Add target portal group infrastructure Nicholas A. Bellinger
` (12 subsequent siblings)
20 siblings, 0 replies; 22+ messages in thread
From: Nicholas A. Bellinger @ 2010-12-17 21:11 UTC (permalink / raw)
To: linux-scsi, James Bottomley; +Cc: Nicholas Bellinger
From: Nicholas Bellinger <nab@linux-iscsi.org>
The patch adds the core struct se_device functionality that is used internally by
target_core_mod, as well generically by TCM/ConfigFS enabled fabric modules.
This includes the management of struct se_port, the location of struct se_lun for a
struct se_node_acl for an incoming I/O, and handling of the underlying struct
block_device claim and release for TCM backstores.
Signed-off-by: Nicholas A. Bellinger <nab@linux-iscsi.org>
---
drivers/target/target_core_device.c | 1694 +++++++++++++++++++++++++++++++++++
include/target/target_core_device.h | 61 ++
2 files changed, 1755 insertions(+), 0 deletions(-)
create mode 100644 drivers/target/target_core_device.c
create mode 100644 include/target/target_core_device.h
diff --git a/drivers/target/target_core_device.c b/drivers/target/target_core_device.c
new file mode 100644
index 0000000..00a21f0
--- /dev/null
+++ b/drivers/target/target_core_device.c
@@ -0,0 +1,1694 @@
+/*******************************************************************************
+ * Filename: target_core_device.c (based on iscsi_target_device.c)
+ *
+ * This file contains the iSCSI Virtual Device and Disk Transport
+ * agnostic related functions.
+ *
+ * Copyright (c) 2003, 2004, 2005 PyX Technologies, Inc.
+ * Copyright (c) 2005-2006 SBE, Inc. All Rights Reserved.
+ * Copyright (c) 2007-2010 Rising Tide Systems
+ * Copyright (c) 2008-2010 Linux-iSCSI.org
+ *
+ * Nicholas A. Bellinger <nab@kernel.org>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+ *
+ ******************************************************************************/
+
+#include <linux/net.h>
+#include <linux/string.h>
+#include <linux/delay.h>
+#include <linux/timer.h>
+#include <linux/slab.h>
+#include <linux/spinlock.h>
+#include <linux/smp_lock.h>
+#include <linux/kthread.h>
+#include <linux/in.h>
+#include <net/sock.h>
+#include <net/tcp.h>
+#include <scsi/scsi.h>
+
+#include <target/target_core_base.h>
+#include <target/target_core_device.h>
+#include <target/target_core_tpg.h>
+#include <target/target_core_transport.h>
+#include <target/target_core_fabric_ops.h>
+
+#include "target_core_alua.h"
+#include "target_core_hba.h"
+#include "target_core_pr.h"
+#include "target_core_ua.h"
+
+static void se_dev_start(struct se_device *dev);
+static void se_dev_stop(struct se_device *dev);
+
+int transport_get_lun_for_cmd(
+ struct se_cmd *se_cmd,
+ unsigned char *cdb,
+ u32 unpacked_lun)
+{
+ struct se_dev_entry *deve;
+ struct se_lun *se_lun = NULL;
+ struct se_session *se_sess = SE_SESS(se_cmd);
+ unsigned long flags;
+ int read_only = 0;
+
+ spin_lock_irq(&SE_NODE_ACL(se_sess)->device_list_lock);
+ deve = se_cmd->se_deve =
+ &SE_NODE_ACL(se_sess)->device_list[unpacked_lun];
+ if (deve->lun_flags & TRANSPORT_LUNFLAGS_INITIATOR_ACCESS) {
+ if (se_cmd) {
+ deve->total_cmds++;
+ deve->total_bytes += se_cmd->data_length;
+
+ if (se_cmd->data_direction == DMA_TO_DEVICE) {
+ if (deve->lun_flags &
+ TRANSPORT_LUNFLAGS_READ_ONLY) {
+ read_only = 1;
+ goto out;
+ }
+ deve->write_bytes += se_cmd->data_length;
+ } else if (se_cmd->data_direction ==
+ DMA_FROM_DEVICE) {
+ deve->read_bytes += se_cmd->data_length;
+ }
+ }
+ deve->deve_cmds++;
+
+ se_lun = se_cmd->se_lun = deve->se_lun;
+ se_cmd->pr_res_key = deve->pr_res_key;
+ se_cmd->orig_fe_lun = unpacked_lun;
+ se_cmd->se_orig_obj_ptr = SE_LUN(se_cmd)->lun_se_dev;
+ se_cmd->se_cmd_flags |= SCF_SE_LUN_CMD;
+ }
+out:
+ spin_unlock_irq(&SE_NODE_ACL(se_sess)->device_list_lock);
+
+ if (!se_lun) {
+ if (read_only) {
+ se_cmd->scsi_sense_reason = TCM_WRITE_PROTECTED;
+ se_cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION;
+ printk("TARGET_CORE[%s]: Detected WRITE_PROTECTED LUN"
+ " Access for 0x%08x\n",
+ CMD_TFO(se_cmd)->get_fabric_name(),
+ unpacked_lun);
+ return -1;
+ } else {
+ /*
+ * Use the se_portal_group->tpg_virt_lun0 to allow for
+ * REPORT_LUNS, et al to be returned when no active
+ * MappedLUN=0 exists for this Initiator Port.
+ */
+ if (unpacked_lun != 0) {
+ se_cmd->scsi_sense_reason = TCM_NON_EXISTENT_LUN;
+ se_cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION;
+ printk("TARGET_CORE[%s]: Detected NON_EXISTENT_LUN"
+ " Access for 0x%08x\n",
+ CMD_TFO(se_cmd)->get_fabric_name(),
+ unpacked_lun);
+ return -1;
+ }
+ /*
+ * Force WRITE PROTECT for virtual LUN 0
+ */
+ if ((se_cmd->data_direction != DMA_FROM_DEVICE) &&
+ (se_cmd->data_direction != DMA_NONE)) {
+ se_cmd->scsi_sense_reason = TCM_WRITE_PROTECTED;
+ se_cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION;
+ return -1;
+ }
+#if 0
+ printk("TARGET_CORE[%s]: Using virtual LUN0! :-)\n",
+ CMD_TFO(se_cmd)->get_fabric_name());
+#endif
+ se_lun = se_cmd->se_lun = &se_sess->se_tpg->tpg_virt_lun0;
+ se_cmd->orig_fe_lun = 0;
+ se_cmd->se_orig_obj_ptr = SE_LUN(se_cmd)->lun_se_dev;
+ se_cmd->se_cmd_flags |= SCF_SE_LUN_CMD;
+ }
+ }
+ /*
+ * Determine if the struct se_lun is online.
+ */
+/* #warning FIXME: Check for LUN_RESET + UNIT Attention */
+ if (se_dev_check_online(se_lun->lun_se_dev) != 0) {
+ se_cmd->scsi_sense_reason = TCM_NON_EXISTENT_LUN;
+ se_cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION;
+ return -1;
+ }
+
+ {
+ struct se_device *dev = se_lun->lun_se_dev;
+ spin_lock(&dev->stats_lock);
+ dev->num_cmds++;
+ if (se_cmd->data_direction == DMA_TO_DEVICE)
+ dev->write_bytes += se_cmd->data_length;
+ else if (se_cmd->data_direction == DMA_FROM_DEVICE)
+ dev->read_bytes += se_cmd->data_length;
+ spin_unlock(&dev->stats_lock);
+ }
+
+ /*
+ * Add the iscsi_cmd_t to the struct se_lun's cmd list. This list is used
+ * for tracking state of struct se_cmds during LUN shutdown events.
+ */
+ spin_lock_irqsave(&se_lun->lun_cmd_lock, flags);
+ list_add_tail(&se_cmd->se_lun_list, &se_lun->lun_cmd_list);
+ atomic_set(&T_TASK(se_cmd)->transport_lun_active, 1);
+#if 0
+ printk(KERN_INFO "Adding ITT: 0x%08x to LUN LIST[%d]\n",
+ CMD_TFO(se_cmd)->get_task_tag(se_cmd), se_lun->unpacked_lun);
+#endif
+ spin_unlock_irqrestore(&se_lun->lun_cmd_lock, flags);
+
+ return 0;
+}
+EXPORT_SYMBOL(transport_get_lun_for_cmd);
+
+int transport_get_lun_for_tmr(
+ struct se_cmd *se_cmd,
+ u32 unpacked_lun)
+{
+ struct se_device *dev = NULL;
+ struct se_dev_entry *deve;
+ struct se_lun *se_lun = NULL;
+ struct se_session *se_sess = SE_SESS(se_cmd);
+ struct se_tmr_req *se_tmr = se_cmd->se_tmr_req;
+
+ spin_lock_irq(&SE_NODE_ACL(se_sess)->device_list_lock);
+ deve = se_cmd->se_deve =
+ &SE_NODE_ACL(se_sess)->device_list[unpacked_lun];
+ if (deve->lun_flags & TRANSPORT_LUNFLAGS_INITIATOR_ACCESS) {
+ se_lun = se_cmd->se_lun = se_tmr->tmr_lun = deve->se_lun;
+ dev = se_tmr->tmr_dev = se_lun->lun_se_dev;
+ se_cmd->pr_res_key = deve->pr_res_key;
+ se_cmd->orig_fe_lun = unpacked_lun;
+ se_cmd->se_orig_obj_ptr = SE_LUN(se_cmd)->lun_se_dev;
+/* se_cmd->se_cmd_flags |= SCF_SE_LUN_CMD; */
+ }
+ spin_unlock_irq(&SE_NODE_ACL(se_sess)->device_list_lock);
+
+ if (!se_lun) {
+ printk(KERN_INFO "TARGET_CORE[%s]: Detected NON_EXISTENT_LUN"
+ " Access for 0x%08x\n",
+ CMD_TFO(se_cmd)->get_fabric_name(),
+ unpacked_lun);
+ se_cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION;
+ return -1;
+ }
+ /*
+ * Determine if the struct se_lun is online.
+ */
+/* #warning FIXME: Check for LUN_RESET + UNIT Attention */
+ if (se_dev_check_online(se_lun->lun_se_dev) != 0) {
+ se_cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION;
+ return -1;
+ }
+
+ spin_lock(&dev->se_tmr_lock);
+ list_add_tail(&se_tmr->tmr_list, &dev->dev_tmr_list);
+ spin_unlock(&dev->se_tmr_lock);
+
+ return 0;
+}
+EXPORT_SYMBOL(transport_get_lun_for_tmr);
+
+/*
+ * This function is called from core_scsi3_emulate_pro_register_and_move()
+ * and core_scsi3_decode_spec_i_port(), and will increment &deve->pr_ref_count
+ * when a matching rtpi is found.
+ */
+struct se_dev_entry *core_get_se_deve_from_rtpi(
+ struct se_node_acl *nacl,
+ u16 rtpi)
+{
+ struct se_dev_entry *deve;
+ struct se_lun *lun;
+ struct se_port *port;
+ struct se_portal_group *tpg = nacl->se_tpg;
+ u32 i;
+
+ spin_lock_irq(&nacl->device_list_lock);
+ for (i = 0; i < TRANSPORT_MAX_LUNS_PER_TPG; i++) {
+ deve = &nacl->device_list[i];
+
+ if (!(deve->lun_flags & TRANSPORT_LUNFLAGS_INITIATOR_ACCESS))
+ continue;
+
+ lun = deve->se_lun;
+ if (!(lun)) {
+ printk(KERN_ERR "%s device entries device pointer is"
+ " NULL, but Initiator has access.\n",
+ TPG_TFO(tpg)->get_fabric_name());
+ continue;
+ }
+ port = lun->lun_sep;
+ if (!(port)) {
+ printk(KERN_ERR "%s device entries device pointer is"
+ " NULL, but Initiator has access.\n",
+ TPG_TFO(tpg)->get_fabric_name());
+ continue;
+ }
+ if (port->sep_rtpi != rtpi)
+ continue;
+
+ atomic_inc(&deve->pr_ref_count);
+ smp_mb__after_atomic_inc();
+ spin_unlock_irq(&nacl->device_list_lock);
+
+ return deve;
+ }
+ spin_unlock_irq(&nacl->device_list_lock);
+
+ return NULL;
+}
+
+int core_free_device_list_for_node(
+ struct se_node_acl *nacl,
+ struct se_portal_group *tpg)
+{
+ struct se_dev_entry *deve;
+ struct se_lun *lun;
+ u32 i;
+
+ if (!nacl->device_list)
+ return 0;
+
+ spin_lock_irq(&nacl->device_list_lock);
+ for (i = 0; i < TRANSPORT_MAX_LUNS_PER_TPG; i++) {
+ deve = &nacl->device_list[i];
+
+ if (!(deve->lun_flags & TRANSPORT_LUNFLAGS_INITIATOR_ACCESS))
+ continue;
+
+ if (!deve->se_lun) {
+ printk(KERN_ERR "%s device entries device pointer is"
+ " NULL, but Initiator has access.\n",
+ TPG_TFO(tpg)->get_fabric_name());
+ continue;
+ }
+ lun = deve->se_lun;
+
+ spin_unlock_irq(&nacl->device_list_lock);
+ core_update_device_list_for_node(lun, NULL, deve->mapped_lun,
+ TRANSPORT_LUNFLAGS_NO_ACCESS, nacl, tpg, 0);
+ spin_lock_irq(&nacl->device_list_lock);
+ }
+ spin_unlock_irq(&nacl->device_list_lock);
+
+ kfree(nacl->device_list);
+ nacl->device_list = NULL;
+
+ return 0;
+}
+
+void core_dec_lacl_count(struct se_node_acl *se_nacl, struct se_cmd *se_cmd)
+{
+ struct se_dev_entry *deve;
+
+ spin_lock_irq(&se_nacl->device_list_lock);
+ deve = &se_nacl->device_list[se_cmd->orig_fe_lun];
+ deve->deve_cmds--;
+ spin_unlock_irq(&se_nacl->device_list_lock);
+
+ return;
+}
+
+void core_update_device_list_access(
+ u32 mapped_lun,
+ u32 lun_access,
+ struct se_node_acl *nacl)
+{
+ struct se_dev_entry *deve;
+
+ spin_lock_irq(&nacl->device_list_lock);
+ deve = &nacl->device_list[mapped_lun];
+ if (lun_access & TRANSPORT_LUNFLAGS_READ_WRITE) {
+ deve->lun_flags &= ~TRANSPORT_LUNFLAGS_READ_ONLY;
+ deve->lun_flags |= TRANSPORT_LUNFLAGS_READ_WRITE;
+ } else {
+ deve->lun_flags &= ~TRANSPORT_LUNFLAGS_READ_WRITE;
+ deve->lun_flags |= TRANSPORT_LUNFLAGS_READ_ONLY;
+ }
+ spin_unlock_irq(&nacl->device_list_lock);
+
+ return;
+}
+
+/* core_update_device_list_for_node():
+ *
+ *
+ */
+int core_update_device_list_for_node(
+ struct se_lun *lun,
+ struct se_lun_acl *lun_acl,
+ u32 mapped_lun,
+ u32 lun_access,
+ struct se_node_acl *nacl,
+ struct se_portal_group *tpg,
+ int enable)
+{
+ struct se_port *port = lun->lun_sep;
+ struct se_dev_entry *deve = &nacl->device_list[mapped_lun];
+ int trans = 0;
+ /*
+ * If the MappedLUN entry is being disabled, the entry in
+ * port->sep_alua_list must be removed now before clearing the
+ * struct se_dev_entry pointers below as logic in
+ * core_alua_do_transition_tg_pt() depends on these being present.
+ */
+ if (!(enable)) {
+ /*
+ * deve->se_lun_acl will be NULL for demo-mode created LUNs
+ * that have not been explictly concerted to MappedLUNs ->
+ * struct se_lun_acl.
+ */
+ if (!(deve->se_lun_acl))
+ return 0;
+
+ spin_lock_bh(&port->sep_alua_lock);
+ list_del(&deve->alua_port_list);
+ spin_unlock_bh(&port->sep_alua_lock);
+ }
+
+ spin_lock_irq(&nacl->device_list_lock);
+ if (enable) {
+ /*
+ * Check if the call is handling demo mode -> explict LUN ACL
+ * transition. This transition must be for the same struct se_lun
+ * + mapped_lun that was setup in demo mode..
+ */
+ if (deve->lun_flags & TRANSPORT_LUNFLAGS_INITIATOR_ACCESS) {
+ if (deve->se_lun_acl != NULL) {
+ printk(KERN_ERR "struct se_dev_entry->se_lun_acl"
+ " already set for demo mode -> explict"
+ " LUN ACL transition\n");
+ return -1;
+ }
+ if (deve->se_lun != lun) {
+ printk(KERN_ERR "struct se_dev_entry->se_lun does"
+ " match passed struct se_lun for demo mode"
+ " -> explict LUN ACL transition\n");
+ return -1;
+ }
+ deve->se_lun_acl = lun_acl;
+ trans = 1;
+ } else {
+ deve->se_lun = lun;
+ deve->se_lun_acl = lun_acl;
+ deve->mapped_lun = mapped_lun;
+ deve->lun_flags |= TRANSPORT_LUNFLAGS_INITIATOR_ACCESS;
+ }
+
+ if (lun_access & TRANSPORT_LUNFLAGS_READ_WRITE) {
+ deve->lun_flags &= ~TRANSPORT_LUNFLAGS_READ_ONLY;
+ deve->lun_flags |= TRANSPORT_LUNFLAGS_READ_WRITE;
+ } else {
+ deve->lun_flags &= ~TRANSPORT_LUNFLAGS_READ_WRITE;
+ deve->lun_flags |= TRANSPORT_LUNFLAGS_READ_ONLY;
+ }
+
+ if (trans) {
+ spin_unlock_irq(&nacl->device_list_lock);
+ return 0;
+ }
+ deve->creation_time = get_jiffies_64();
+ deve->attach_count++;
+ spin_unlock_irq(&nacl->device_list_lock);
+
+ spin_lock_bh(&port->sep_alua_lock);
+ list_add_tail(&deve->alua_port_list, &port->sep_alua_list);
+ spin_unlock_bh(&port->sep_alua_lock);
+
+ return 0;
+ }
+ /*
+ * Wait for any in process SPEC_I_PT=1 or REGISTER_AND_MOVE
+ * PR operation to complete.
+ */
+ spin_unlock_irq(&nacl->device_list_lock);
+ while (atomic_read(&deve->pr_ref_count) != 0)
+ cpu_relax();
+ spin_lock_irq(&nacl->device_list_lock);
+ /*
+ * Disable struct se_dev_entry LUN ACL mapping
+ */
+ core_scsi3_ua_release_all(deve);
+ deve->se_lun = NULL;
+ deve->se_lun_acl = NULL;
+ deve->lun_flags = 0;
+ deve->creation_time = 0;
+ deve->attach_count--;
+ spin_unlock_irq(&nacl->device_list_lock);
+
+ core_scsi3_free_pr_reg_from_nacl(lun->lun_se_dev, nacl);
+ return 0;
+}
+
+/* core_clear_lun_from_tpg():
+ *
+ *
+ */
+void core_clear_lun_from_tpg(struct se_lun *lun, struct se_portal_group *tpg)
+{
+ struct se_node_acl *nacl;
+ struct se_dev_entry *deve;
+ u32 i;
+
+ spin_lock_bh(&tpg->acl_node_lock);
+ list_for_each_entry(nacl, &tpg->acl_node_list, acl_list) {
+ spin_unlock_bh(&tpg->acl_node_lock);
+
+ spin_lock_irq(&nacl->device_list_lock);
+ for (i = 0; i < TRANSPORT_MAX_LUNS_PER_TPG; i++) {
+ deve = &nacl->device_list[i];
+ if (lun != deve->se_lun)
+ continue;
+ spin_unlock_irq(&nacl->device_list_lock);
+
+ core_update_device_list_for_node(lun, NULL,
+ deve->mapped_lun, TRANSPORT_LUNFLAGS_NO_ACCESS,
+ nacl, tpg, 0);
+
+ spin_lock_irq(&nacl->device_list_lock);
+ }
+ spin_unlock_irq(&nacl->device_list_lock);
+
+ spin_lock_bh(&tpg->acl_node_lock);
+ }
+ spin_unlock_bh(&tpg->acl_node_lock);
+
+ return;
+}
+
+static struct se_port *core_alloc_port(struct se_device *dev)
+{
+ struct se_port *port, *port_tmp;
+
+ port = kzalloc(sizeof(struct se_port), GFP_KERNEL);
+ if (!(port)) {
+ printk(KERN_ERR "Unable to allocate struct se_port\n");
+ return NULL;
+ }
+ INIT_LIST_HEAD(&port->sep_alua_list);
+ INIT_LIST_HEAD(&port->sep_list);
+ atomic_set(&port->sep_tg_pt_secondary_offline, 0);
+ spin_lock_init(&port->sep_alua_lock);
+ mutex_init(&port->sep_tg_pt_md_mutex);
+
+ spin_lock(&dev->se_port_lock);
+ if (dev->dev_port_count == 0x0000ffff) {
+ printk(KERN_WARNING "Reached dev->dev_port_count =="
+ " 0x0000ffff\n");
+ spin_unlock(&dev->se_port_lock);
+ return NULL;
+ }
+again:
+ /*
+ * Allocate the next RELATIVE TARGET PORT IDENTIFER for this struct se_device
+ * Here is the table from spc4r17 section 7.7.3.8.
+ *
+ * Table 473 -- RELATIVE TARGET PORT IDENTIFIER field
+ *
+ * Code Description
+ * 0h Reserved
+ * 1h Relative port 1, historically known as port A
+ * 2h Relative port 2, historically known as port B
+ * 3h to FFFFh Relative port 3 through 65 535
+ */
+ port->sep_rtpi = dev->dev_rpti_counter++;
+ if (!(port->sep_rtpi))
+ goto again;
+
+ list_for_each_entry(port_tmp, &dev->dev_sep_list, sep_list) {
+ /*
+ * Make sure RELATIVE TARGET PORT IDENTIFER is unique
+ * for 16-bit wrap..
+ */
+ if (port->sep_rtpi == port_tmp->sep_rtpi)
+ goto again;
+ }
+ spin_unlock(&dev->se_port_lock);
+
+ return port;
+}
+
+static void core_export_port(
+ struct se_device *dev,
+ struct se_portal_group *tpg,
+ struct se_port *port,
+ struct se_lun *lun)
+{
+ struct se_subsystem_dev *su_dev = SU_DEV(dev);
+ struct t10_alua_tg_pt_gp_member *tg_pt_gp_mem = NULL;
+
+ spin_lock(&dev->se_port_lock);
+ spin_lock(&lun->lun_sep_lock);
+ port->sep_tpg = tpg;
+ port->sep_lun = lun;
+ lun->lun_sep = port;
+ spin_unlock(&lun->lun_sep_lock);
+
+ list_add_tail(&port->sep_list, &dev->dev_sep_list);
+ spin_unlock(&dev->se_port_lock);
+
+ if (T10_ALUA(su_dev)->alua_type == SPC3_ALUA_EMULATED) {
+ tg_pt_gp_mem = core_alua_allocate_tg_pt_gp_mem(port);
+ if (IS_ERR(tg_pt_gp_mem) || !tg_pt_gp_mem) {
+ printk(KERN_ERR "Unable to allocate t10_alua_tg_pt"
+ "_gp_member_t\n");
+ return;
+ }
+ spin_lock(&tg_pt_gp_mem->tg_pt_gp_mem_lock);
+ __core_alua_attach_tg_pt_gp_mem(tg_pt_gp_mem,
+ T10_ALUA(su_dev)->default_tg_pt_gp);
+ spin_unlock(&tg_pt_gp_mem->tg_pt_gp_mem_lock);
+ printk(KERN_INFO "%s/%s: Adding to default ALUA Target Port"
+ " Group: alua/default_tg_pt_gp\n",
+ TRANSPORT(dev)->name, TPG_TFO(tpg)->get_fabric_name());
+ }
+
+ dev->dev_port_count++;
+ port->sep_index = port->sep_rtpi; /* RELATIVE TARGET PORT IDENTIFER */
+}
+
+/*
+ * Called with struct se_device->se_port_lock spinlock held.
+ */
+static void core_release_port(struct se_device *dev, struct se_port *port)
+{
+ /*
+ * Wait for any port reference for PR ALL_TG_PT=1 operation
+ * to complete in __core_scsi3_alloc_registration()
+ */
+ spin_unlock(&dev->se_port_lock);
+ if (atomic_read(&port->sep_tg_pt_ref_cnt))
+ cpu_relax();
+ spin_lock(&dev->se_port_lock);
+
+ core_alua_free_tg_pt_gp_mem(port);
+
+ list_del(&port->sep_list);
+ dev->dev_port_count--;
+ kfree(port);
+
+ return;
+}
+
+int core_dev_export(
+ struct se_device *dev,
+ struct se_portal_group *tpg,
+ struct se_lun *lun)
+{
+ struct se_port *port;
+
+ port = core_alloc_port(dev);
+ if (!(port))
+ return -1;
+
+ lun->lun_se_dev = dev;
+ se_dev_start(dev);
+
+ atomic_inc(&dev->dev_export_obj.obj_access_count);
+ core_export_port(dev, tpg, port, lun);
+ return 0;
+}
+
+void core_dev_unexport(
+ struct se_device *dev,
+ struct se_portal_group *tpg,
+ struct se_lun *lun)
+{
+ struct se_port *port = lun->lun_sep;
+
+ spin_lock(&lun->lun_sep_lock);
+ if (lun->lun_se_dev == NULL) {
+ spin_unlock(&lun->lun_sep_lock);
+ return;
+ }
+ spin_unlock(&lun->lun_sep_lock);
+
+ spin_lock(&dev->se_port_lock);
+ atomic_dec(&dev->dev_export_obj.obj_access_count);
+ core_release_port(dev, port);
+ spin_unlock(&dev->se_port_lock);
+
+ se_dev_stop(dev);
+ lun->lun_se_dev = NULL;
+}
+
+int transport_core_report_lun_response(struct se_cmd *se_cmd)
+{
+ struct se_dev_entry *deve;
+ struct se_lun *se_lun;
+ struct se_session *se_sess = SE_SESS(se_cmd);
+ struct se_task *se_task;
+ unsigned char *buf = (unsigned char *)T_TASK(se_cmd)->t_task_buf;
+ u32 cdb_offset = 0, lun_count = 0, offset = 8;
+ u64 i, lun;
+
+ list_for_each_entry(se_task, &T_TASK(se_cmd)->t_task_list, t_list)
+ break;
+
+ if (!(se_task)) {
+ printk(KERN_ERR "Unable to locate struct se_task for struct se_cmd\n");
+ return PYX_TRANSPORT_LU_COMM_FAILURE;
+ }
+
+ /*
+ * If no struct se_session pointer is present, this struct se_cmd is
+ * coming via a target_core_mod PASSTHROUGH op, and not through
+ * a $FABRIC_MOD. In that case, report LUN=0 only.
+ */
+ if (!(se_sess)) {
+ lun = 0;
+ buf[offset++] = ((lun >> 56) & 0xff);
+ buf[offset++] = ((lun >> 48) & 0xff);
+ buf[offset++] = ((lun >> 40) & 0xff);
+ buf[offset++] = ((lun >> 32) & 0xff);
+ buf[offset++] = ((lun >> 24) & 0xff);
+ buf[offset++] = ((lun >> 16) & 0xff);
+ buf[offset++] = ((lun >> 8) & 0xff);
+ buf[offset++] = (lun & 0xff);
+ lun_count = 1;
+ goto done;
+ }
+
+ spin_lock_irq(&SE_NODE_ACL(se_sess)->device_list_lock);
+ for (i = 0; i < TRANSPORT_MAX_LUNS_PER_TPG; i++) {
+ deve = &SE_NODE_ACL(se_sess)->device_list[i];
+ if (!(deve->lun_flags & TRANSPORT_LUNFLAGS_INITIATOR_ACCESS))
+ continue;
+ se_lun = deve->se_lun;
+ /*
+ * We determine the correct LUN LIST LENGTH even once we
+ * have reached the initial allocation length.
+ * See SPC2-R20 7.19.
+ */
+ lun_count++;
+ if ((cdb_offset + 8) >= se_cmd->data_length)
+ continue;
+
+ lun = cpu_to_be64(CMD_TFO(se_cmd)->pack_lun(deve->mapped_lun));
+ buf[offset++] = ((lun >> 56) & 0xff);
+ buf[offset++] = ((lun >> 48) & 0xff);
+ buf[offset++] = ((lun >> 40) & 0xff);
+ buf[offset++] = ((lun >> 32) & 0xff);
+ buf[offset++] = ((lun >> 24) & 0xff);
+ buf[offset++] = ((lun >> 16) & 0xff);
+ buf[offset++] = ((lun >> 8) & 0xff);
+ buf[offset++] = (lun & 0xff);
+ cdb_offset += 8;
+ }
+ spin_unlock_irq(&SE_NODE_ACL(se_sess)->device_list_lock);
+
+ /*
+ * See SPC3 r07, page 159.
+ */
+done:
+ lun_count *= 8;
+ buf[0] = ((lun_count >> 24) & 0xff);
+ buf[1] = ((lun_count >> 16) & 0xff);
+ buf[2] = ((lun_count >> 8) & 0xff);
+ buf[3] = (lun_count & 0xff);
+
+ return PYX_TRANSPORT_SENT_TO_TRANSPORT;
+}
+
+/* se_release_device_for_hba():
+ *
+ *
+ */
+void se_release_device_for_hba(struct se_device *dev)
+{
+ struct se_hba *hba = dev->se_hba;
+
+ if ((dev->dev_status & TRANSPORT_DEVICE_ACTIVATED) ||
+ (dev->dev_status & TRANSPORT_DEVICE_DEACTIVATED) ||
+ (dev->dev_status & TRANSPORT_DEVICE_SHUTDOWN) ||
+ (dev->dev_status & TRANSPORT_DEVICE_OFFLINE_ACTIVATED) ||
+ (dev->dev_status & TRANSPORT_DEVICE_OFFLINE_DEACTIVATED))
+ se_dev_stop(dev);
+
+ if (dev->dev_ptr) {
+ kthread_stop(dev->process_thread);
+ if (dev->transport->free_device)
+ dev->transport->free_device(dev->dev_ptr);
+ }
+
+ spin_lock(&hba->device_lock);
+ list_del(&dev->dev_list);
+ hba->dev_count--;
+ spin_unlock(&hba->device_lock);
+
+ core_scsi3_free_all_registrations(dev);
+ se_release_vpd_for_dev(dev);
+
+ kfree(dev->dev_status_queue_obj);
+ kfree(dev->dev_queue_obj);
+ kfree(dev);
+
+ return;
+}
+
+void se_release_vpd_for_dev(struct se_device *dev)
+{
+ struct t10_vpd *vpd, *vpd_tmp;
+
+ spin_lock(&DEV_T10_WWN(dev)->t10_vpd_lock);
+ list_for_each_entry_safe(vpd, vpd_tmp,
+ &DEV_T10_WWN(dev)->t10_vpd_list, vpd_list) {
+ list_del(&vpd->vpd_list);
+ kfree(vpd);
+ }
+ spin_unlock(&DEV_T10_WWN(dev)->t10_vpd_lock);
+
+ return;
+}
+
+/*
+ * Called with struct se_hba->device_lock held.
+ */
+void se_clear_dev_ports(struct se_device *dev)
+{
+ struct se_hba *hba = dev->se_hba;
+ struct se_lun *lun;
+ struct se_portal_group *tpg;
+ struct se_port *sep, *sep_tmp;
+
+ spin_lock(&dev->se_port_lock);
+ list_for_each_entry_safe(sep, sep_tmp, &dev->dev_sep_list, sep_list) {
+ spin_unlock(&dev->se_port_lock);
+ spin_unlock(&hba->device_lock);
+
+ lun = sep->sep_lun;
+ tpg = sep->sep_tpg;
+ spin_lock(&lun->lun_sep_lock);
+ if (lun->lun_se_dev == NULL) {
+ spin_unlock(&lun->lun_sep_lock);
+ continue;
+ }
+ spin_unlock(&lun->lun_sep_lock);
+
+ core_dev_del_lun(tpg, lun->unpacked_lun);
+
+ spin_lock(&hba->device_lock);
+ spin_lock(&dev->se_port_lock);
+ }
+ spin_unlock(&dev->se_port_lock);
+
+ return;
+}
+
+/* se_free_virtual_device():
+ *
+ * Used for IBLOCK, RAMDISK, and FILEIO Transport Drivers.
+ */
+int se_free_virtual_device(struct se_device *dev, struct se_hba *hba)
+{
+ spin_lock(&hba->device_lock);
+ se_clear_dev_ports(dev);
+ spin_unlock(&hba->device_lock);
+
+ core_alua_free_lu_gp_mem(dev);
+ se_release_device_for_hba(dev);
+
+ return 0;
+}
+
+static void se_dev_start(struct se_device *dev)
+{
+ struct se_hba *hba = dev->se_hba;
+
+ spin_lock(&hba->device_lock);
+ atomic_inc(&dev->dev_obj.obj_access_count);
+ if (atomic_read(&dev->dev_obj.obj_access_count) == 1) {
+ if (dev->dev_status & TRANSPORT_DEVICE_DEACTIVATED) {
+ dev->dev_status &= ~TRANSPORT_DEVICE_DEACTIVATED;
+ dev->dev_status |= TRANSPORT_DEVICE_ACTIVATED;
+ } else if (dev->dev_status &
+ TRANSPORT_DEVICE_OFFLINE_DEACTIVATED) {
+ dev->dev_status &=
+ ~TRANSPORT_DEVICE_OFFLINE_DEACTIVATED;
+ dev->dev_status |= TRANSPORT_DEVICE_OFFLINE_ACTIVATED;
+ }
+ }
+ spin_unlock(&hba->device_lock);
+}
+
+static void se_dev_stop(struct se_device *dev)
+{
+ struct se_hba *hba = dev->se_hba;
+
+ spin_lock(&hba->device_lock);
+ atomic_dec(&dev->dev_obj.obj_access_count);
+ if (atomic_read(&dev->dev_obj.obj_access_count) == 0) {
+ if (dev->dev_status & TRANSPORT_DEVICE_ACTIVATED) {
+ dev->dev_status &= ~TRANSPORT_DEVICE_ACTIVATED;
+ dev->dev_status |= TRANSPORT_DEVICE_DEACTIVATED;
+ } else if (dev->dev_status &
+ TRANSPORT_DEVICE_OFFLINE_ACTIVATED) {
+ dev->dev_status &= ~TRANSPORT_DEVICE_OFFLINE_ACTIVATED;
+ dev->dev_status |= TRANSPORT_DEVICE_OFFLINE_DEACTIVATED;
+ }
+ }
+ spin_unlock(&hba->device_lock);
+
+ while (atomic_read(&hba->dev_mib_access_count))
+ cpu_relax();
+}
+
+int se_dev_check_online(struct se_device *dev)
+{
+ int ret;
+
+ spin_lock_irq(&dev->dev_status_lock);
+ ret = ((dev->dev_status & TRANSPORT_DEVICE_ACTIVATED) ||
+ (dev->dev_status & TRANSPORT_DEVICE_DEACTIVATED)) ? 0 : 1;
+ spin_unlock_irq(&dev->dev_status_lock);
+
+ return ret;
+}
+
+int se_dev_check_shutdown(struct se_device *dev)
+{
+ int ret;
+
+ spin_lock_irq(&dev->dev_status_lock);
+ ret = (dev->dev_status & TRANSPORT_DEVICE_SHUTDOWN);
+ spin_unlock_irq(&dev->dev_status_lock);
+
+ return ret;
+}
+
+void se_dev_set_default_attribs(
+ struct se_device *dev,
+ struct se_dev_limits *dev_limits)
+{
+ struct queue_limits *limits = &dev_limits->limits;
+
+ DEV_ATTRIB(dev)->emulate_dpo = DA_EMULATE_DPO;
+ DEV_ATTRIB(dev)->emulate_fua_write = DA_EMULATE_FUA_WRITE;
+ DEV_ATTRIB(dev)->emulate_fua_read = DA_EMULATE_FUA_READ;
+ DEV_ATTRIB(dev)->emulate_write_cache = DA_EMULATE_WRITE_CACHE;
+ DEV_ATTRIB(dev)->emulate_ua_intlck_ctrl = DA_EMULATE_UA_INTLLCK_CTRL;
+ DEV_ATTRIB(dev)->emulate_tas = DA_EMULATE_TAS;
+ DEV_ATTRIB(dev)->emulate_tpu = DA_EMULATE_TPU;
+ DEV_ATTRIB(dev)->emulate_tpws = DA_EMULATE_TPWS;
+ DEV_ATTRIB(dev)->emulate_reservations = DA_EMULATE_RESERVATIONS;
+ DEV_ATTRIB(dev)->emulate_alua = DA_EMULATE_ALUA;
+ DEV_ATTRIB(dev)->enforce_pr_isids = DA_ENFORCE_PR_ISIDS;
+ /*
+ * The TPU=1 and TPWS=1 settings will be set in TCM/IBLOCK
+ * iblock_create_virtdevice() from struct queue_limits values
+ * if blk_queue_discard()==1
+ */
+ DEV_ATTRIB(dev)->max_unmap_lba_count = DA_MAX_UNMAP_LBA_COUNT;
+ DEV_ATTRIB(dev)->max_unmap_block_desc_count =
+ DA_MAX_UNMAP_BLOCK_DESC_COUNT;
+ DEV_ATTRIB(dev)->unmap_granularity = DA_UNMAP_GRANULARITY_DEFAULT;
+ DEV_ATTRIB(dev)->unmap_granularity_alignment =
+ DA_UNMAP_GRANULARITY_ALIGNMENT_DEFAULT;
+ /*
+ * block_size is based on subsystem plugin dependent requirements.
+ */
+ DEV_ATTRIB(dev)->hw_block_size = limits->logical_block_size;
+ DEV_ATTRIB(dev)->block_size = limits->logical_block_size;
+ /*
+ * max_sectors is based on subsystem plugin dependent requirements.
+ */
+ DEV_ATTRIB(dev)->hw_max_sectors = limits->max_hw_sectors;
+ DEV_ATTRIB(dev)->max_sectors = limits->max_sectors;
+ /*
+ * Set optimal_sectors from max_sectors, which can be lowered via
+ * configfs.
+ */
+ DEV_ATTRIB(dev)->optimal_sectors = limits->max_sectors;
+ /*
+ * queue_depth is based on subsystem plugin dependent requirements.
+ */
+ DEV_ATTRIB(dev)->hw_queue_depth = dev_limits->hw_queue_depth;
+ DEV_ATTRIB(dev)->queue_depth = dev_limits->queue_depth;
+}
+
+int se_dev_set_task_timeout(struct se_device *dev, u32 task_timeout)
+{
+ if (task_timeout > DA_TASK_TIMEOUT_MAX) {
+ printk(KERN_ERR "dev[%p]: Passed task_timeout: %u larger then"
+ " DA_TASK_TIMEOUT_MAX\n", dev, task_timeout);
+ return -1;
+ } else {
+ DEV_ATTRIB(dev)->task_timeout = task_timeout;
+ printk(KERN_INFO "dev[%p]: Set SE Device task_timeout: %u\n",
+ dev, task_timeout);
+ }
+
+ return 0;
+}
+
+int se_dev_set_max_unmap_lba_count(
+ struct se_device *dev,
+ u32 max_unmap_lba_count)
+{
+ DEV_ATTRIB(dev)->max_unmap_lba_count = max_unmap_lba_count;
+ printk(KERN_INFO "dev[%p]: Set max_unmap_lba_count: %u\n",
+ dev, DEV_ATTRIB(dev)->max_unmap_lba_count);
+ return 0;
+}
+
+int se_dev_set_max_unmap_block_desc_count(
+ struct se_device *dev,
+ u32 max_unmap_block_desc_count)
+{
+ DEV_ATTRIB(dev)->max_unmap_block_desc_count = max_unmap_block_desc_count;
+ printk(KERN_INFO "dev[%p]: Set max_unmap_block_desc_count: %u\n",
+ dev, DEV_ATTRIB(dev)->max_unmap_block_desc_count);
+ return 0;
+}
+
+int se_dev_set_unmap_granularity(
+ struct se_device *dev,
+ u32 unmap_granularity)
+{
+ DEV_ATTRIB(dev)->unmap_granularity = unmap_granularity;
+ printk(KERN_INFO "dev[%p]: Set unmap_granularity: %u\n",
+ dev, DEV_ATTRIB(dev)->unmap_granularity);
+ return 0;
+}
+
+int se_dev_set_unmap_granularity_alignment(
+ struct se_device *dev,
+ u32 unmap_granularity_alignment)
+{
+ DEV_ATTRIB(dev)->unmap_granularity_alignment = unmap_granularity_alignment;
+ printk(KERN_INFO "dev[%p]: Set unmap_granularity_alignment: %u\n",
+ dev, DEV_ATTRIB(dev)->unmap_granularity_alignment);
+ return 0;
+}
+
+int se_dev_set_emulate_dpo(struct se_device *dev, int flag)
+{
+ if ((flag != 0) && (flag != 1)) {
+ printk(KERN_ERR "Illegal value %d\n", flag);
+ return -1;
+ }
+ if (TRANSPORT(dev)->dpo_emulated == NULL) {
+ printk(KERN_ERR "TRANSPORT(dev)->dpo_emulated is NULL\n");
+ return -1;
+ }
+ if (TRANSPORT(dev)->dpo_emulated(dev) == 0) {
+ printk(KERN_ERR "TRANSPORT(dev)->dpo_emulated not supported\n");
+ return -1;
+ }
+ DEV_ATTRIB(dev)->emulate_dpo = flag;
+ printk(KERN_INFO "dev[%p]: SE Device Page Out (DPO) Emulation"
+ " bit: %d\n", dev, DEV_ATTRIB(dev)->emulate_dpo);
+ return 0;
+}
+
+int se_dev_set_emulate_fua_write(struct se_device *dev, int flag)
+{
+ if ((flag != 0) && (flag != 1)) {
+ printk(KERN_ERR "Illegal value %d\n", flag);
+ return -1;
+ }
+ if (TRANSPORT(dev)->fua_write_emulated == NULL) {
+ printk(KERN_ERR "TRANSPORT(dev)->fua_write_emulated is NULL\n");
+ return -1;
+ }
+ if (TRANSPORT(dev)->fua_write_emulated(dev) == 0) {
+ printk(KERN_ERR "TRANSPORT(dev)->fua_write_emulated not supported\n");
+ return -1;
+ }
+ DEV_ATTRIB(dev)->emulate_fua_write = flag;
+ printk(KERN_INFO "dev[%p]: SE Device Forced Unit Access WRITEs: %d\n",
+ dev, DEV_ATTRIB(dev)->emulate_fua_write);
+ return 0;
+}
+
+int se_dev_set_emulate_fua_read(struct se_device *dev, int flag)
+{
+ if ((flag != 0) && (flag != 1)) {
+ printk(KERN_ERR "Illegal value %d\n", flag);
+ return -1;
+ }
+ if (TRANSPORT(dev)->fua_read_emulated == NULL) {
+ printk(KERN_ERR "TRANSPORT(dev)->fua_read_emulated is NULL\n");
+ return -1;
+ }
+ if (TRANSPORT(dev)->fua_read_emulated(dev) == 0) {
+ printk(KERN_ERR "TRANSPORT(dev)->fua_read_emulated not supported\n");
+ return -1;
+ }
+ DEV_ATTRIB(dev)->emulate_fua_read = flag;
+ printk(KERN_INFO "dev[%p]: SE Device Forced Unit Access READs: %d\n",
+ dev, DEV_ATTRIB(dev)->emulate_fua_read);
+ return 0;
+}
+
+int se_dev_set_emulate_write_cache(struct se_device *dev, int flag)
+{
+ if ((flag != 0) && (flag != 1)) {
+ printk(KERN_ERR "Illegal value %d\n", flag);
+ return -1;
+ }
+ if (TRANSPORT(dev)->write_cache_emulated == NULL) {
+ printk(KERN_ERR "TRANSPORT(dev)->write_cache_emulated is NULL\n");
+ return -1;
+ }
+ if (TRANSPORT(dev)->write_cache_emulated(dev) == 0) {
+ printk(KERN_ERR "TRANSPORT(dev)->write_cache_emulated not supported\n");
+ return -1;
+ }
+ DEV_ATTRIB(dev)->emulate_write_cache = flag;
+ printk(KERN_INFO "dev[%p]: SE Device WRITE_CACHE_EMULATION flag: %d\n",
+ dev, DEV_ATTRIB(dev)->emulate_write_cache);
+ return 0;
+}
+
+int se_dev_set_emulate_ua_intlck_ctrl(struct se_device *dev, int flag)
+{
+ if ((flag != 0) && (flag != 1) && (flag != 2)) {
+ printk(KERN_ERR "Illegal value %d\n", flag);
+ return -1;
+ }
+
+ if (atomic_read(&dev->dev_export_obj.obj_access_count)) {
+ printk(KERN_ERR "dev[%p]: Unable to change SE Device"
+ " UA_INTRLCK_CTRL while dev_export_obj: %d count"
+ " exists\n", dev,
+ atomic_read(&dev->dev_export_obj.obj_access_count));
+ return -1;
+ }
+ DEV_ATTRIB(dev)->emulate_ua_intlck_ctrl = flag;
+ printk(KERN_INFO "dev[%p]: SE Device UA_INTRLCK_CTRL flag: %d\n",
+ dev, DEV_ATTRIB(dev)->emulate_ua_intlck_ctrl);
+
+ return 0;
+}
+
+int se_dev_set_emulate_tas(struct se_device *dev, int flag)
+{
+ if ((flag != 0) && (flag != 1)) {
+ printk(KERN_ERR "Illegal value %d\n", flag);
+ return -1;
+ }
+
+ if (atomic_read(&dev->dev_export_obj.obj_access_count)) {
+ printk(KERN_ERR "dev[%p]: Unable to change SE Device TAS while"
+ " dev_export_obj: %d count exists\n", dev,
+ atomic_read(&dev->dev_export_obj.obj_access_count));
+ return -1;
+ }
+ DEV_ATTRIB(dev)->emulate_tas = flag;
+ printk(KERN_INFO "dev[%p]: SE Device TASK_ABORTED status bit: %s\n",
+ dev, (DEV_ATTRIB(dev)->emulate_tas) ? "Enabled" : "Disabled");
+
+ return 0;
+}
+
+int se_dev_set_emulate_tpu(struct se_device *dev, int flag)
+{
+ if ((flag != 0) && (flag != 1)) {
+ printk(KERN_ERR "Illegal value %d\n", flag);
+ return -1;
+ }
+ /*
+ * We expect this value to be non-zero when generic Block Layer
+ * Discard supported is detected iblock_create_virtdevice().
+ */
+ if (!(DEV_ATTRIB(dev)->max_unmap_block_desc_count)) {
+ printk(KERN_ERR "Generic Block Discard not supported\n");
+ return -ENOSYS;
+ }
+
+ DEV_ATTRIB(dev)->emulate_tpu = flag;
+ printk(KERN_INFO "dev[%p]: SE Device Thin Provisioning UNMAP bit: %d\n",
+ dev, flag);
+ return 0;
+}
+
+int se_dev_set_emulate_tpws(struct se_device *dev, int flag)
+{
+ if ((flag != 0) && (flag != 1)) {
+ printk(KERN_ERR "Illegal value %d\n", flag);
+ return -1;
+ }
+ /*
+ * We expect this value to be non-zero when generic Block Layer
+ * Discard supported is detected iblock_create_virtdevice().
+ */
+ if (!(DEV_ATTRIB(dev)->max_unmap_block_desc_count)) {
+ printk(KERN_ERR "Generic Block Discard not supported\n");
+ return -ENOSYS;
+ }
+
+ DEV_ATTRIB(dev)->emulate_tpws = flag;
+ printk(KERN_INFO "dev[%p]: SE Device Thin Provisioning WRITE_SAME: %d\n",
+ dev, flag);
+ return 0;
+}
+
+int se_dev_set_enforce_pr_isids(struct se_device *dev, int flag)
+{
+ if ((flag != 0) && (flag != 1)) {
+ printk(KERN_ERR "Illegal value %d\n", flag);
+ return -1;
+ }
+ DEV_ATTRIB(dev)->enforce_pr_isids = flag;
+ printk(KERN_INFO "dev[%p]: SE Device enforce_pr_isids bit: %s\n", dev,
+ (DEV_ATTRIB(dev)->enforce_pr_isids) ? "Enabled" : "Disabled");
+ return 0;
+}
+
+/*
+ * Note, this can only be called on unexported SE Device Object.
+ */
+int se_dev_set_queue_depth(struct se_device *dev, u32 queue_depth)
+{
+ u32 orig_queue_depth = dev->queue_depth;
+
+ if (atomic_read(&dev->dev_export_obj.obj_access_count)) {
+ printk(KERN_ERR "dev[%p]: Unable to change SE Device TCQ while"
+ " dev_export_obj: %d count exists\n", dev,
+ atomic_read(&dev->dev_export_obj.obj_access_count));
+ return -1;
+ }
+ if (!(queue_depth)) {
+ printk(KERN_ERR "dev[%p]: Illegal ZERO value for queue"
+ "_depth\n", dev);
+ return -1;
+ }
+
+ if (TRANSPORT(dev)->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV) {
+ if (queue_depth > DEV_ATTRIB(dev)->hw_queue_depth) {
+ printk(KERN_ERR "dev[%p]: Passed queue_depth: %u"
+ " exceeds TCM/SE_Device TCQ: %u\n",
+ dev, queue_depth,
+ DEV_ATTRIB(dev)->hw_queue_depth);
+ return -1;
+ }
+ } else {
+ if (queue_depth > DEV_ATTRIB(dev)->queue_depth) {
+ if (queue_depth > DEV_ATTRIB(dev)->hw_queue_depth) {
+ printk(KERN_ERR "dev[%p]: Passed queue_depth:"
+ " %u exceeds TCM/SE_Device MAX"
+ " TCQ: %u\n", dev, queue_depth,
+ DEV_ATTRIB(dev)->hw_queue_depth);
+ return -1;
+ }
+ }
+ }
+
+ DEV_ATTRIB(dev)->queue_depth = dev->queue_depth = queue_depth;
+ if (queue_depth > orig_queue_depth)
+ atomic_add(queue_depth - orig_queue_depth, &dev->depth_left);
+ else if (queue_depth < orig_queue_depth)
+ atomic_sub(orig_queue_depth - queue_depth, &dev->depth_left);
+
+ printk(KERN_INFO "dev[%p]: SE Device TCQ Depth changed to: %u\n",
+ dev, queue_depth);
+ return 0;
+}
+
+int se_dev_set_max_sectors(struct se_device *dev, u32 max_sectors)
+{
+ int force = 0; /* Force setting for VDEVS */
+
+ if (atomic_read(&dev->dev_export_obj.obj_access_count)) {
+ printk(KERN_ERR "dev[%p]: Unable to change SE Device"
+ " max_sectors while dev_export_obj: %d count exists\n",
+ dev, atomic_read(&dev->dev_export_obj.obj_access_count));
+ return -1;
+ }
+ if (!(max_sectors)) {
+ printk(KERN_ERR "dev[%p]: Illegal ZERO value for"
+ " max_sectors\n", dev);
+ return -1;
+ }
+ if (max_sectors < DA_STATUS_MAX_SECTORS_MIN) {
+ printk(KERN_ERR "dev[%p]: Passed max_sectors: %u less than"
+ " DA_STATUS_MAX_SECTORS_MIN: %u\n", dev, max_sectors,
+ DA_STATUS_MAX_SECTORS_MIN);
+ return -1;
+ }
+ if (TRANSPORT(dev)->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV) {
+ if (max_sectors > DEV_ATTRIB(dev)->hw_max_sectors) {
+ printk(KERN_ERR "dev[%p]: Passed max_sectors: %u"
+ " greater than TCM/SE_Device max_sectors:"
+ " %u\n", dev, max_sectors,
+ DEV_ATTRIB(dev)->hw_max_sectors);
+ return -1;
+ }
+ } else {
+ if (!(force) && (max_sectors >
+ DEV_ATTRIB(dev)->hw_max_sectors)) {
+ printk(KERN_ERR "dev[%p]: Passed max_sectors: %u"
+ " greater than TCM/SE_Device max_sectors"
+ ": %u, use force=1 to override.\n", dev,
+ max_sectors, DEV_ATTRIB(dev)->hw_max_sectors);
+ return -1;
+ }
+ if (max_sectors > DA_STATUS_MAX_SECTORS_MAX) {
+ printk(KERN_ERR "dev[%p]: Passed max_sectors: %u"
+ " greater than DA_STATUS_MAX_SECTORS_MAX:"
+ " %u\n", dev, max_sectors,
+ DA_STATUS_MAX_SECTORS_MAX);
+ return -1;
+ }
+ }
+
+ DEV_ATTRIB(dev)->max_sectors = max_sectors;
+ printk("dev[%p]: SE Device max_sectors changed to %u\n",
+ dev, max_sectors);
+ return 0;
+}
+
+int se_dev_set_optimal_sectors(struct se_device *dev, u32 optimal_sectors)
+{
+ if (atomic_read(&dev->dev_export_obj.obj_access_count)) {
+ printk(KERN_ERR "dev[%p]: Unable to change SE Device"
+ " optimal_sectors while dev_export_obj: %d count exists\n",
+ dev, atomic_read(&dev->dev_export_obj.obj_access_count));
+ return -EINVAL;
+ }
+ if (TRANSPORT(dev)->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV) {
+ printk(KERN_ERR "dev[%p]: Passed optimal_sectors cannot be"
+ " changed for TCM/pSCSI\n", dev);
+ return -EINVAL;
+ }
+ if (optimal_sectors > DEV_ATTRIB(dev)->max_sectors) {
+ printk(KERN_ERR "dev[%p]: Passed optimal_sectors %u cannot be"
+ " greater than max_sectors: %u\n", dev,
+ optimal_sectors, DEV_ATTRIB(dev)->max_sectors);
+ return -EINVAL;
+ }
+
+ DEV_ATTRIB(dev)->optimal_sectors = optimal_sectors;
+ printk(KERN_INFO "dev[%p]: SE Device optimal_sectors changed to %u\n",
+ dev, optimal_sectors);
+ return 0;
+}
+
+int se_dev_set_block_size(struct se_device *dev, u32 block_size)
+{
+ if (atomic_read(&dev->dev_export_obj.obj_access_count)) {
+ printk(KERN_ERR "dev[%p]: Unable to change SE Device block_size"
+ " while dev_export_obj: %d count exists\n", dev,
+ atomic_read(&dev->dev_export_obj.obj_access_count));
+ return -1;
+ }
+
+ if ((block_size != 512) &&
+ (block_size != 1024) &&
+ (block_size != 2048) &&
+ (block_size != 4096)) {
+ printk(KERN_ERR "dev[%p]: Illegal value for block_device: %u"
+ " for SE device, must be 512, 1024, 2048 or 4096\n",
+ dev, block_size);
+ return -1;
+ }
+
+ if (TRANSPORT(dev)->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV) {
+ printk(KERN_ERR "dev[%p]: Not allowed to change block_size for"
+ " Physical Device, use for Linux/SCSI to change"
+ " block_size for underlying hardware\n", dev);
+ return -1;
+ }
+
+ DEV_ATTRIB(dev)->block_size = block_size;
+ printk(KERN_INFO "dev[%p]: SE Device block_size changed to %u\n",
+ dev, block_size);
+ return 0;
+}
+
+struct se_lun *core_dev_add_lun(
+ struct se_portal_group *tpg,
+ struct se_hba *hba,
+ struct se_device *dev,
+ u32 lun)
+{
+ struct se_lun *lun_p;
+ u32 lun_access = 0;
+
+ if (atomic_read(&dev->dev_access_obj.obj_access_count) != 0) {
+ printk(KERN_ERR "Unable to export struct se_device while dev_access_obj: %d\n",
+ atomic_read(&dev->dev_access_obj.obj_access_count));
+ return NULL;
+ }
+
+ lun_p = core_tpg_pre_addlun(tpg, lun);
+ if ((IS_ERR(lun_p)) || !(lun_p))
+ return NULL;
+
+ if (dev->dev_flags & DF_READ_ONLY)
+ lun_access = TRANSPORT_LUNFLAGS_READ_ONLY;
+ else
+ lun_access = TRANSPORT_LUNFLAGS_READ_WRITE;
+
+ if (core_tpg_post_addlun(tpg, lun_p, lun_access, dev) < 0)
+ return NULL;
+
+ printk(KERN_INFO "%s_TPG[%u]_LUN[%u] - Activated %s Logical Unit from"
+ " CORE HBA: %u\n", TPG_TFO(tpg)->get_fabric_name(),
+ TPG_TFO(tpg)->tpg_get_tag(tpg), lun_p->unpacked_lun,
+ TPG_TFO(tpg)->get_fabric_name(), hba->hba_id);
+ /*
+ * Update LUN maps for dynamically added initiators when
+ * generate_node_acl is enabled.
+ */
+ if (TPG_TFO(tpg)->tpg_check_demo_mode(tpg)) {
+ struct se_node_acl *acl;
+ spin_lock_bh(&tpg->acl_node_lock);
+ list_for_each_entry(acl, &tpg->acl_node_list, acl_list) {
+ if (acl->dynamic_node_acl) {
+ spin_unlock_bh(&tpg->acl_node_lock);
+ core_tpg_add_node_to_devs(acl, tpg);
+ spin_lock_bh(&tpg->acl_node_lock);
+ }
+ }
+ spin_unlock_bh(&tpg->acl_node_lock);
+ }
+
+ return lun_p;
+}
+
+/* core_dev_del_lun():
+ *
+ *
+ */
+int core_dev_del_lun(
+ struct se_portal_group *tpg,
+ u32 unpacked_lun)
+{
+ struct se_lun *lun;
+ int ret = 0;
+
+ lun = core_tpg_pre_dellun(tpg, unpacked_lun, &ret);
+ if (!(lun))
+ return ret;
+
+ core_tpg_post_dellun(tpg, lun);
+
+ printk(KERN_INFO "%s_TPG[%u]_LUN[%u] - Deactivated %s Logical Unit from"
+ " device object\n", TPG_TFO(tpg)->get_fabric_name(),
+ TPG_TFO(tpg)->tpg_get_tag(tpg), unpacked_lun,
+ TPG_TFO(tpg)->get_fabric_name());
+
+ return 0;
+}
+
+struct se_lun *core_get_lun_from_tpg(struct se_portal_group *tpg, u32 unpacked_lun)
+{
+ struct se_lun *lun;
+
+ spin_lock(&tpg->tpg_lun_lock);
+ if (unpacked_lun > (TRANSPORT_MAX_LUNS_PER_TPG-1)) {
+ printk(KERN_ERR "%s LUN: %u exceeds TRANSPORT_MAX_LUNS"
+ "_PER_TPG-1: %u for Target Portal Group: %hu\n",
+ TPG_TFO(tpg)->get_fabric_name(), unpacked_lun,
+ TRANSPORT_MAX_LUNS_PER_TPG-1,
+ TPG_TFO(tpg)->tpg_get_tag(tpg));
+ spin_unlock(&tpg->tpg_lun_lock);
+ return NULL;
+ }
+ lun = &tpg->tpg_lun_list[unpacked_lun];
+
+ if (lun->lun_status != TRANSPORT_LUN_STATUS_FREE) {
+ printk(KERN_ERR "%s Logical Unit Number: %u is not free on"
+ " Target Portal Group: %hu, ignoring request.\n",
+ TPG_TFO(tpg)->get_fabric_name(), unpacked_lun,
+ TPG_TFO(tpg)->tpg_get_tag(tpg));
+ spin_unlock(&tpg->tpg_lun_lock);
+ return NULL;
+ }
+ spin_unlock(&tpg->tpg_lun_lock);
+
+ return lun;
+}
+
+/* core_dev_get_lun():
+ *
+ *
+ */
+static struct se_lun *core_dev_get_lun(struct se_portal_group *tpg, u32 unpacked_lun)
+{
+ struct se_lun *lun;
+
+ spin_lock(&tpg->tpg_lun_lock);
+ if (unpacked_lun > (TRANSPORT_MAX_LUNS_PER_TPG-1)) {
+ printk(KERN_ERR "%s LUN: %u exceeds TRANSPORT_MAX_LUNS_PER"
+ "_TPG-1: %u for Target Portal Group: %hu\n",
+ TPG_TFO(tpg)->get_fabric_name(), unpacked_lun,
+ TRANSPORT_MAX_LUNS_PER_TPG-1,
+ TPG_TFO(tpg)->tpg_get_tag(tpg));
+ spin_unlock(&tpg->tpg_lun_lock);
+ return NULL;
+ }
+ lun = &tpg->tpg_lun_list[unpacked_lun];
+
+ if (lun->lun_status != TRANSPORT_LUN_STATUS_ACTIVE) {
+ printk(KERN_ERR "%s Logical Unit Number: %u is not active on"
+ " Target Portal Group: %hu, ignoring request.\n",
+ TPG_TFO(tpg)->get_fabric_name(), unpacked_lun,
+ TPG_TFO(tpg)->tpg_get_tag(tpg));
+ spin_unlock(&tpg->tpg_lun_lock);
+ return NULL;
+ }
+ spin_unlock(&tpg->tpg_lun_lock);
+
+ return lun;
+}
+
+struct se_lun_acl *core_dev_init_initiator_node_lun_acl(
+ struct se_portal_group *tpg,
+ u32 mapped_lun,
+ char *initiatorname,
+ int *ret)
+{
+ struct se_lun_acl *lacl;
+ struct se_node_acl *nacl;
+
+ if (strlen(initiatorname) > TRANSPORT_IQN_LEN) {
+ printk(KERN_ERR "%s InitiatorName exceeds maximum size.\n",
+ TPG_TFO(tpg)->get_fabric_name());
+ *ret = -EOVERFLOW;
+ return NULL;
+ }
+ nacl = core_tpg_get_initiator_node_acl(tpg, initiatorname);
+ if (!(nacl)) {
+ *ret = -EINVAL;
+ return NULL;
+ }
+ lacl = kzalloc(sizeof(struct se_lun_acl), GFP_KERNEL);
+ if (!(lacl)) {
+ printk(KERN_ERR "Unable to allocate memory for struct se_lun_acl.\n");
+ *ret = -ENOMEM;
+ return NULL;
+ }
+
+ INIT_LIST_HEAD(&lacl->lacl_list);
+ lacl->mapped_lun = mapped_lun;
+ lacl->se_lun_nacl = nacl;
+ snprintf(lacl->initiatorname, TRANSPORT_IQN_LEN, "%s", initiatorname);
+
+ return lacl;
+}
+
+int core_dev_add_initiator_node_lun_acl(
+ struct se_portal_group *tpg,
+ struct se_lun_acl *lacl,
+ u32 unpacked_lun,
+ u32 lun_access)
+{
+ struct se_lun *lun;
+ struct se_node_acl *nacl;
+
+ lun = core_dev_get_lun(tpg, unpacked_lun);
+ if (!(lun)) {
+ printk(KERN_ERR "%s Logical Unit Number: %u is not active on"
+ " Target Portal Group: %hu, ignoring request.\n",
+ TPG_TFO(tpg)->get_fabric_name(), unpacked_lun,
+ TPG_TFO(tpg)->tpg_get_tag(tpg));
+ return -EINVAL;
+ }
+
+ nacl = lacl->se_lun_nacl;
+ if (!(nacl))
+ return -EINVAL;
+
+ if ((lun->lun_access & TRANSPORT_LUNFLAGS_READ_ONLY) &&
+ (lun_access & TRANSPORT_LUNFLAGS_READ_WRITE))
+ lun_access = TRANSPORT_LUNFLAGS_READ_ONLY;
+
+ lacl->se_lun = lun;
+
+ if (core_update_device_list_for_node(lun, lacl, lacl->mapped_lun,
+ lun_access, nacl, tpg, 1) < 0)
+ return -EINVAL;
+
+ spin_lock(&lun->lun_acl_lock);
+ list_add_tail(&lacl->lacl_list, &lun->lun_acl_list);
+ atomic_inc(&lun->lun_acl_count);
+ smp_mb__after_atomic_inc();
+ spin_unlock(&lun->lun_acl_lock);
+
+ printk(KERN_INFO "%s_TPG[%hu]_LUN[%u->%u] - Added %s ACL for "
+ " InitiatorNode: %s\n", TPG_TFO(tpg)->get_fabric_name(),
+ TPG_TFO(tpg)->tpg_get_tag(tpg), unpacked_lun, lacl->mapped_lun,
+ (lun_access & TRANSPORT_LUNFLAGS_READ_WRITE) ? "RW" : "RO",
+ lacl->initiatorname);
+ /*
+ * Check to see if there are any existing persistent reservation APTPL
+ * pre-registrations that need to be enabled for this LUN ACL..
+ */
+ core_scsi3_check_aptpl_registration(lun->lun_se_dev, tpg, lun, lacl);
+ return 0;
+}
+
+/* core_dev_del_initiator_node_lun_acl():
+ *
+ *
+ */
+int core_dev_del_initiator_node_lun_acl(
+ struct se_portal_group *tpg,
+ struct se_lun *lun,
+ struct se_lun_acl *lacl)
+{
+ struct se_node_acl *nacl;
+
+ nacl = lacl->se_lun_nacl;
+ if (!(nacl))
+ return -EINVAL;
+
+ spin_lock(&lun->lun_acl_lock);
+ list_del(&lacl->lacl_list);
+ atomic_dec(&lun->lun_acl_count);
+ smp_mb__after_atomic_dec();
+ spin_unlock(&lun->lun_acl_lock);
+
+ core_update_device_list_for_node(lun, NULL, lacl->mapped_lun,
+ TRANSPORT_LUNFLAGS_NO_ACCESS, nacl, tpg, 0);
+
+ lacl->se_lun = NULL;
+
+ printk(KERN_INFO "%s_TPG[%hu]_LUN[%u] - Removed ACL for"
+ " InitiatorNode: %s Mapped LUN: %u\n",
+ TPG_TFO(tpg)->get_fabric_name(),
+ TPG_TFO(tpg)->tpg_get_tag(tpg), lun->unpacked_lun,
+ lacl->initiatorname, lacl->mapped_lun);
+
+ return 0;
+}
+
+void core_dev_free_initiator_node_lun_acl(
+ struct se_portal_group *tpg,
+ struct se_lun_acl *lacl)
+{
+ printk("%s_TPG[%hu] - Freeing ACL for %s InitiatorNode: %s"
+ " Mapped LUN: %u\n", TPG_TFO(tpg)->get_fabric_name(),
+ TPG_TFO(tpg)->tpg_get_tag(tpg),
+ TPG_TFO(tpg)->get_fabric_name(),
+ lacl->initiatorname, lacl->mapped_lun);
+
+ kfree(lacl);
+}
+
+int core_dev_setup_virtual_lun0(void)
+{
+ struct se_hba *hba;
+ struct se_device *dev;
+ struct se_subsystem_dev *se_dev = NULL;
+ struct se_subsystem_api *t;
+ char buf[16];
+ int ret;
+
+ hba = core_alloc_hba("rd_dr", 0, HBA_FLAGS_INTERNAL_USE);
+ if (IS_ERR(hba))
+ return PTR_ERR(hba);
+
+ se_global->g_lun0_hba = hba;
+ t = hba->transport;
+
+ se_dev = kzalloc(sizeof(struct se_subsystem_dev), GFP_KERNEL);
+ if (!(se_dev)) {
+ printk(KERN_ERR "Unable to allocate memory for"
+ " struct se_subsystem_dev\n");
+ ret = -ENOMEM;
+ goto out;
+ }
+ INIT_LIST_HEAD(&se_dev->g_se_dev_list);
+ INIT_LIST_HEAD(&se_dev->t10_wwn.t10_vpd_list);
+ spin_lock_init(&se_dev->t10_wwn.t10_vpd_lock);
+ INIT_LIST_HEAD(&se_dev->t10_reservation.registration_list);
+ INIT_LIST_HEAD(&se_dev->t10_reservation.aptpl_reg_list);
+ spin_lock_init(&se_dev->t10_reservation.registration_lock);
+ spin_lock_init(&se_dev->t10_reservation.aptpl_reg_lock);
+ INIT_LIST_HEAD(&se_dev->t10_alua.tg_pt_gps_list);
+ spin_lock_init(&se_dev->t10_alua.tg_pt_gps_lock);
+ spin_lock_init(&se_dev->se_dev_lock);
+ se_dev->t10_reservation.pr_aptpl_buf_len = PR_APTPL_BUF_LEN;
+ se_dev->t10_wwn.t10_sub_dev = se_dev;
+ se_dev->t10_alua.t10_sub_dev = se_dev;
+ se_dev->se_dev_attrib.da_sub_dev = se_dev;
+ se_dev->se_dev_hba = hba;
+
+ se_dev->se_dev_su_ptr = t->allocate_virtdevice(hba, "virt_lun0");
+ if (!(se_dev->se_dev_su_ptr)) {
+ printk(KERN_ERR "Unable to locate subsystem dependent pointer"
+ " from allocate_virtdevice()\n");
+ ret = -ENOMEM;
+ goto out;
+ }
+ se_global->g_lun0_su_dev = se_dev;
+
+ memset(buf, 0, 16);
+ sprintf(buf, "rd_pages=8");
+ t->set_configfs_dev_params(hba, se_dev, buf, sizeof(buf));
+
+ dev = t->create_virtdevice(hba, se_dev, se_dev->se_dev_su_ptr);
+ if (!(dev) || IS_ERR(dev)) {
+ ret = -ENOMEM;
+ goto out;
+ }
+ se_dev->se_dev_ptr = dev;
+ se_global->g_lun0_dev = dev;
+
+ return 0;
+out:
+ se_global->g_lun0_su_dev = NULL;
+ kfree(se_dev);
+ if (se_global->g_lun0_hba) {
+ core_delete_hba(se_global->g_lun0_hba);
+ se_global->g_lun0_hba = NULL;
+ }
+ return ret;
+}
+
+
+void core_dev_release_virtual_lun0(void)
+{
+ struct se_hba *hba = se_global->g_lun0_hba;
+ struct se_subsystem_dev *su_dev = se_global->g_lun0_su_dev;
+
+ if (!(hba))
+ return;
+
+ if (se_global->g_lun0_dev)
+ se_free_virtual_device(se_global->g_lun0_dev, hba);
+
+ kfree(su_dev);
+ core_delete_hba(hba);
+}
diff --git a/include/target/target_core_device.h b/include/target/target_core_device.h
new file mode 100644
index 0000000..52b18a5
--- /dev/null
+++ b/include/target/target_core_device.h
@@ -0,0 +1,61 @@
+#ifndef TARGET_CORE_DEVICE_H
+#define TARGET_CORE_DEVICE_H
+
+extern int transport_get_lun_for_cmd(struct se_cmd *, unsigned char *, u32);
+extern int transport_get_lun_for_tmr(struct se_cmd *, u32);
+extern struct se_dev_entry *core_get_se_deve_from_rtpi(
+ struct se_node_acl *, u16);
+extern int core_free_device_list_for_node(struct se_node_acl *,
+ struct se_portal_group *);
+extern void core_dec_lacl_count(struct se_node_acl *, struct se_cmd *);
+extern void core_update_device_list_access(u32, u32, struct se_node_acl *);
+extern int core_update_device_list_for_node(struct se_lun *, struct se_lun_acl *, u32,
+ u32, struct se_node_acl *,
+ struct se_portal_group *, int);
+extern void core_clear_lun_from_tpg(struct se_lun *, struct se_portal_group *);
+extern int core_dev_export(struct se_device *, struct se_portal_group *,
+ struct se_lun *);
+extern void core_dev_unexport(struct se_device *, struct se_portal_group *,
+ struct se_lun *);
+extern int transport_core_report_lun_response(struct se_cmd *);
+extern void se_release_device_for_hba(struct se_device *);
+extern void se_release_vpd_for_dev(struct se_device *);
+extern void se_clear_dev_ports(struct se_device *);
+extern int se_free_virtual_device(struct se_device *, struct se_hba *);
+extern int se_dev_check_online(struct se_device *);
+extern int se_dev_check_shutdown(struct se_device *);
+extern void se_dev_set_default_attribs(struct se_device *, struct se_dev_limits *);
+extern int se_dev_set_task_timeout(struct se_device *, u32);
+extern int se_dev_set_max_unmap_lba_count(struct se_device *, u32);
+extern int se_dev_set_max_unmap_block_desc_count(struct se_device *, u32);
+extern int se_dev_set_unmap_granularity(struct se_device *, u32);
+extern int se_dev_set_unmap_granularity_alignment(struct se_device *, u32);
+extern int se_dev_set_emulate_dpo(struct se_device *, int);
+extern int se_dev_set_emulate_fua_write(struct se_device *, int);
+extern int se_dev_set_emulate_fua_read(struct se_device *, int);
+extern int se_dev_set_emulate_write_cache(struct se_device *, int);
+extern int se_dev_set_emulate_ua_intlck_ctrl(struct se_device *, int);
+extern int se_dev_set_emulate_tas(struct se_device *, int);
+extern int se_dev_set_emulate_tpu(struct se_device *, int);
+extern int se_dev_set_emulate_tpws(struct se_device *, int);
+extern int se_dev_set_enforce_pr_isids(struct se_device *, int);
+extern int se_dev_set_queue_depth(struct se_device *, u32);
+extern int se_dev_set_max_sectors(struct se_device *, u32);
+extern int se_dev_set_optimal_sectors(struct se_device *, u32);
+extern int se_dev_set_block_size(struct se_device *, u32);
+extern struct se_lun *core_dev_add_lun(struct se_portal_group *, struct se_hba *,
+ struct se_device *, u32);
+extern int core_dev_del_lun(struct se_portal_group *, u32);
+extern struct se_lun *core_get_lun_from_tpg(struct se_portal_group *, u32);
+extern struct se_lun_acl *core_dev_init_initiator_node_lun_acl(struct se_portal_group *,
+ u32, char *, int *);
+extern int core_dev_add_initiator_node_lun_acl(struct se_portal_group *,
+ struct se_lun_acl *, u32, u32);
+extern int core_dev_del_initiator_node_lun_acl(struct se_portal_group *,
+ struct se_lun *, struct se_lun_acl *);
+extern void core_dev_free_initiator_node_lun_acl(struct se_portal_group *,
+ struct se_lun_acl *lacl);
+extern int core_dev_setup_virtual_lun0(void);
+extern void core_dev_release_virtual_lun0(void);
+
+#endif /* TARGET_CORE_DEVICE_H */
--
1.7.3.4
^ permalink raw reply related [flat|nested] 22+ messages in thread* [PATCH v2 02h/03] target: Add target portal group infrastructure
2010-12-17 21:11 [PATCH v2 00/03] target: Initial merge of v4.0.0-rc6 for .38 Nicholas A. Bellinger
` (7 preceding siblings ...)
2010-12-17 21:11 ` [PATCH v2 02g/03] target: Add device " Nicholas A. Bellinger
@ 2010-12-17 21:11 ` Nicholas A. Bellinger
2010-12-17 21:11 ` [PATCH v2 02i/03] target: Add SPC-4 compliant Persistent Reservations (PR) Nicholas A. Bellinger
` (11 subsequent siblings)
20 siblings, 0 replies; 22+ messages in thread
From: Nicholas A. Bellinger @ 2010-12-17 21:11 UTC (permalink / raw)
To: linux-scsi, James Bottomley; +Cc: Nicholas Bellinger
From: Nicholas Bellinger <nab@linux-iscsi.org>
The patch adds the core struct se_portal_group functionality that is used internally by
TCM fabric independent configfs infrastructure.
Signed-off-by: Nicholas A. Bellinger <nab@linux-iscsi.org>
---
drivers/target/target_core_tpg.c | 826 ++++++++++++++++++++++++++++++++++++++
include/target/target_core_tpg.h | 35 ++
2 files changed, 861 insertions(+), 0 deletions(-)
create mode 100644 drivers/target/target_core_tpg.c
create mode 100644 include/target/target_core_tpg.h
diff --git a/drivers/target/target_core_tpg.c b/drivers/target/target_core_tpg.c
new file mode 100644
index 0000000..abfa81a
--- /dev/null
+++ b/drivers/target/target_core_tpg.c
@@ -0,0 +1,826 @@
+/*******************************************************************************
+ * Filename: target_core_tpg.c
+ *
+ * This file contains generic Target Portal Group related functions.
+ *
+ * Copyright (c) 2002, 2003, 2004, 2005 PyX Technologies, Inc.
+ * Copyright (c) 2005, 2006, 2007 SBE, Inc.
+ * Copyright (c) 2007-2010 Rising Tide Systems
+ * Copyright (c) 2008-2010 Linux-iSCSI.org
+ *
+ * Nicholas A. Bellinger <nab@kernel.org>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+ *
+ ******************************************************************************/
+
+#include <linux/net.h>
+#include <linux/string.h>
+#include <linux/timer.h>
+#include <linux/slab.h>
+#include <linux/spinlock.h>
+#include <linux/smp_lock.h>
+#include <linux/in.h>
+#include <net/sock.h>
+#include <net/tcp.h>
+#include <scsi/scsi.h>
+#include <scsi/scsi_cmnd.h>
+
+#include <target/target_core_base.h>
+#include <target/target_core_device.h>
+#include <target/target_core_tpg.h>
+#include <target/target_core_transport.h>
+#include <target/target_core_fabric_ops.h>
+
+#include "target_core_hba.h"
+
+/* core_clear_initiator_node_from_tpg():
+ *
+ *
+ */
+static void core_clear_initiator_node_from_tpg(
+ struct se_node_acl *nacl,
+ struct se_portal_group *tpg)
+{
+ int i;
+ struct se_dev_entry *deve;
+ struct se_lun *lun;
+ struct se_lun_acl *acl, *acl_tmp;
+
+ spin_lock_irq(&nacl->device_list_lock);
+ for (i = 0; i < TRANSPORT_MAX_LUNS_PER_TPG; i++) {
+ deve = &nacl->device_list[i];
+
+ if (!(deve->lun_flags & TRANSPORT_LUNFLAGS_INITIATOR_ACCESS))
+ continue;
+
+ if (!deve->se_lun) {
+ printk(KERN_ERR "%s device entries device pointer is"
+ " NULL, but Initiator has access.\n",
+ TPG_TFO(tpg)->get_fabric_name());
+ continue;
+ }
+
+ lun = deve->se_lun;
+ spin_unlock_irq(&nacl->device_list_lock);
+ core_update_device_list_for_node(lun, NULL, deve->mapped_lun,
+ TRANSPORT_LUNFLAGS_NO_ACCESS, nacl, tpg, 0);
+
+ spin_lock(&lun->lun_acl_lock);
+ list_for_each_entry_safe(acl, acl_tmp,
+ &lun->lun_acl_list, lacl_list) {
+ if (!(strcmp(acl->initiatorname,
+ nacl->initiatorname)) &&
+ (acl->mapped_lun == deve->mapped_lun))
+ break;
+ }
+
+ if (!acl) {
+ printk(KERN_ERR "Unable to locate struct se_lun_acl for %s,"
+ " mapped_lun: %u\n", nacl->initiatorname,
+ deve->mapped_lun);
+ spin_unlock(&lun->lun_acl_lock);
+ spin_lock_irq(&nacl->device_list_lock);
+ continue;
+ }
+
+ list_del(&acl->lacl_list);
+ spin_unlock(&lun->lun_acl_lock);
+
+ spin_lock_irq(&nacl->device_list_lock);
+ kfree(acl);
+ }
+ spin_unlock_irq(&nacl->device_list_lock);
+}
+
+/* __core_tpg_get_initiator_node_acl():
+ *
+ * spin_lock_bh(&tpg->acl_node_lock); must be held when calling
+ */
+struct se_node_acl *__core_tpg_get_initiator_node_acl(
+ struct se_portal_group *tpg,
+ const char *initiatorname)
+{
+ struct se_node_acl *acl;
+
+ list_for_each_entry(acl, &tpg->acl_node_list, acl_list) {
+ if (!(strcmp(acl->initiatorname, initiatorname)))
+ return acl;
+ }
+
+ return NULL;
+}
+
+/* core_tpg_get_initiator_node_acl():
+ *
+ *
+ */
+struct se_node_acl *core_tpg_get_initiator_node_acl(
+ struct se_portal_group *tpg,
+ unsigned char *initiatorname)
+{
+ struct se_node_acl *acl;
+
+ spin_lock_bh(&tpg->acl_node_lock);
+ list_for_each_entry(acl, &tpg->acl_node_list, acl_list) {
+ if (!(strcmp(acl->initiatorname, initiatorname)) &&
+ (!(acl->dynamic_node_acl))) {
+ spin_unlock_bh(&tpg->acl_node_lock);
+ return acl;
+ }
+ }
+ spin_unlock_bh(&tpg->acl_node_lock);
+
+ return NULL;
+}
+
+/* core_tpg_add_node_to_devs():
+ *
+ *
+ */
+void core_tpg_add_node_to_devs(
+ struct se_node_acl *acl,
+ struct se_portal_group *tpg)
+{
+ int i = 0;
+ u32 lun_access = 0;
+ struct se_lun *lun;
+ struct se_device *dev;
+
+ spin_lock(&tpg->tpg_lun_lock);
+ for (i = 0; i < TRANSPORT_MAX_LUNS_PER_TPG; i++) {
+ lun = &tpg->tpg_lun_list[i];
+ if (lun->lun_status != TRANSPORT_LUN_STATUS_ACTIVE)
+ continue;
+
+ spin_unlock(&tpg->tpg_lun_lock);
+
+ dev = lun->lun_se_dev;
+ /*
+ * By default in LIO-Target $FABRIC_MOD,
+ * demo_mode_write_protect is ON, or READ_ONLY;
+ */
+ if (!(TPG_TFO(tpg)->tpg_check_demo_mode_write_protect(tpg))) {
+ if (dev->dev_flags & DF_READ_ONLY)
+ lun_access = TRANSPORT_LUNFLAGS_READ_ONLY;
+ else
+ lun_access = TRANSPORT_LUNFLAGS_READ_WRITE;
+ } else {
+ /*
+ * Allow only optical drives to issue R/W in default RO
+ * demo mode.
+ */
+ if (TRANSPORT(dev)->get_device_type(dev) == TYPE_DISK)
+ lun_access = TRANSPORT_LUNFLAGS_READ_ONLY;
+ else
+ lun_access = TRANSPORT_LUNFLAGS_READ_WRITE;
+ }
+
+ printk(KERN_INFO "TARGET_CORE[%s]->TPG[%u]_LUN[%u] - Adding %s"
+ " access for LUN in Demo Mode\n",
+ TPG_TFO(tpg)->get_fabric_name(),
+ TPG_TFO(tpg)->tpg_get_tag(tpg), lun->unpacked_lun,
+ (lun_access == TRANSPORT_LUNFLAGS_READ_WRITE) ?
+ "READ-WRITE" : "READ-ONLY");
+
+ core_update_device_list_for_node(lun, NULL, lun->unpacked_lun,
+ lun_access, acl, tpg, 1);
+ spin_lock(&tpg->tpg_lun_lock);
+ }
+ spin_unlock(&tpg->tpg_lun_lock);
+}
+
+/* core_set_queue_depth_for_node():
+ *
+ *
+ */
+static int core_set_queue_depth_for_node(
+ struct se_portal_group *tpg,
+ struct se_node_acl *acl)
+{
+ if (!acl->queue_depth) {
+ printk(KERN_ERR "Queue depth for %s Initiator Node: %s is 0,"
+ "defaulting to 1.\n", TPG_TFO(tpg)->get_fabric_name(),
+ acl->initiatorname);
+ acl->queue_depth = 1;
+ }
+
+ return 0;
+}
+
+/* core_create_device_list_for_node():
+ *
+ *
+ */
+static int core_create_device_list_for_node(struct se_node_acl *nacl)
+{
+ struct se_dev_entry *deve;
+ int i;
+
+ nacl->device_list = kzalloc(sizeof(struct se_dev_entry) *
+ TRANSPORT_MAX_LUNS_PER_TPG, GFP_KERNEL);
+ if (!(nacl->device_list)) {
+ printk(KERN_ERR "Unable to allocate memory for"
+ " struct se_node_acl->device_list\n");
+ return -1;
+ }
+ for (i = 0; i < TRANSPORT_MAX_LUNS_PER_TPG; i++) {
+ deve = &nacl->device_list[i];
+
+ atomic_set(&deve->ua_count, 0);
+ atomic_set(&deve->pr_ref_count, 0);
+ spin_lock_init(&deve->ua_lock);
+ INIT_LIST_HEAD(&deve->alua_port_list);
+ INIT_LIST_HEAD(&deve->ua_list);
+ }
+
+ return 0;
+}
+
+/* core_tpg_check_initiator_node_acl()
+ *
+ *
+ */
+struct se_node_acl *core_tpg_check_initiator_node_acl(
+ struct se_portal_group *tpg,
+ unsigned char *initiatorname)
+{
+ struct se_node_acl *acl;
+
+ acl = core_tpg_get_initiator_node_acl(tpg, initiatorname);
+ if ((acl))
+ return acl;
+
+ if (!(TPG_TFO(tpg)->tpg_check_demo_mode(tpg)))
+ return NULL;
+
+ acl = TPG_TFO(tpg)->tpg_alloc_fabric_acl(tpg);
+ if (!(acl))
+ return NULL;
+
+ INIT_LIST_HEAD(&acl->acl_list);
+ INIT_LIST_HEAD(&acl->acl_sess_list);
+ spin_lock_init(&acl->device_list_lock);
+ spin_lock_init(&acl->nacl_sess_lock);
+ atomic_set(&acl->acl_pr_ref_count, 0);
+ atomic_set(&acl->mib_ref_count, 0);
+ acl->queue_depth = TPG_TFO(tpg)->tpg_get_default_depth(tpg);
+ snprintf(acl->initiatorname, TRANSPORT_IQN_LEN, "%s", initiatorname);
+ acl->se_tpg = tpg;
+ acl->acl_index = scsi_get_new_index(SCSI_AUTH_INTR_INDEX);
+ spin_lock_init(&acl->stats_lock);
+ acl->dynamic_node_acl = 1;
+
+ TPG_TFO(tpg)->set_default_node_attributes(acl);
+
+ if (core_create_device_list_for_node(acl) < 0) {
+ TPG_TFO(tpg)->tpg_release_fabric_acl(tpg, acl);
+ return NULL;
+ }
+
+ if (core_set_queue_depth_for_node(tpg, acl) < 0) {
+ core_free_device_list_for_node(acl, tpg);
+ TPG_TFO(tpg)->tpg_release_fabric_acl(tpg, acl);
+ return NULL;
+ }
+
+ core_tpg_add_node_to_devs(acl, tpg);
+
+ spin_lock_bh(&tpg->acl_node_lock);
+ list_add_tail(&acl->acl_list, &tpg->acl_node_list);
+ tpg->num_node_acls++;
+ spin_unlock_bh(&tpg->acl_node_lock);
+
+ printk("%s_TPG[%u] - Added DYNAMIC ACL with TCQ Depth: %d for %s"
+ " Initiator Node: %s\n", TPG_TFO(tpg)->get_fabric_name(),
+ TPG_TFO(tpg)->tpg_get_tag(tpg), acl->queue_depth,
+ TPG_TFO(tpg)->get_fabric_name(), initiatorname);
+
+ return acl;
+}
+EXPORT_SYMBOL(core_tpg_check_initiator_node_acl);
+
+void core_tpg_wait_for_nacl_pr_ref(struct se_node_acl *nacl)
+{
+ while (atomic_read(&nacl->acl_pr_ref_count) != 0)
+ cpu_relax();
+}
+
+void core_tpg_wait_for_mib_ref(struct se_node_acl *nacl)
+{
+ while (atomic_read(&nacl->mib_ref_count) != 0)
+ cpu_relax();
+}
+
+void core_tpg_clear_object_luns(struct se_portal_group *tpg)
+{
+ int i, ret;
+ struct se_lun *lun;
+
+ spin_lock(&tpg->tpg_lun_lock);
+ for (i = 0; i < TRANSPORT_MAX_LUNS_PER_TPG; i++) {
+ lun = &tpg->tpg_lun_list[i];
+
+ if ((lun->lun_status != TRANSPORT_LUN_STATUS_ACTIVE) ||
+ (lun->lun_se_dev == NULL))
+ continue;
+
+ spin_unlock(&tpg->tpg_lun_lock);
+ ret = core_dev_del_lun(tpg, lun->unpacked_lun);
+ spin_lock(&tpg->tpg_lun_lock);
+ }
+ spin_unlock(&tpg->tpg_lun_lock);
+}
+EXPORT_SYMBOL(core_tpg_clear_object_luns);
+
+/* core_tpg_add_initiator_node_acl():
+ *
+ *
+ */
+struct se_node_acl *core_tpg_add_initiator_node_acl(
+ struct se_portal_group *tpg,
+ struct se_node_acl *se_nacl,
+ const char *initiatorname,
+ u32 queue_depth)
+{
+ struct se_node_acl *acl = NULL;
+
+ spin_lock_bh(&tpg->acl_node_lock);
+ acl = __core_tpg_get_initiator_node_acl(tpg, initiatorname);
+ if ((acl)) {
+ if (acl->dynamic_node_acl) {
+ acl->dynamic_node_acl = 0;
+ printk(KERN_INFO "%s_TPG[%u] - Replacing dynamic ACL"
+ " for %s\n", TPG_TFO(tpg)->get_fabric_name(),
+ TPG_TFO(tpg)->tpg_get_tag(tpg), initiatorname);
+ spin_unlock_bh(&tpg->acl_node_lock);
+ /*
+ * Release the locally allocated struct se_node_acl
+ * because * core_tpg_add_initiator_node_acl() returned
+ * a pointer to an existing demo mode node ACL.
+ */
+ if (se_nacl)
+ TPG_TFO(tpg)->tpg_release_fabric_acl(tpg,
+ se_nacl);
+ goto done;
+ }
+
+ printk(KERN_ERR "ACL entry for %s Initiator"
+ " Node %s already exists for TPG %u, ignoring"
+ " request.\n", TPG_TFO(tpg)->get_fabric_name(),
+ initiatorname, TPG_TFO(tpg)->tpg_get_tag(tpg));
+ spin_unlock_bh(&tpg->acl_node_lock);
+ return ERR_PTR(-EEXIST);
+ }
+ spin_unlock_bh(&tpg->acl_node_lock);
+
+ if (!(se_nacl)) {
+ printk("struct se_node_acl pointer is NULL\n");
+ return ERR_PTR(-EINVAL);
+ }
+ /*
+ * For v4.x logic the se_node_acl_s is hanging off a fabric
+ * dependent structure allocated via
+ * struct target_core_fabric_ops->fabric_make_nodeacl()
+ */
+ acl = se_nacl;
+
+ INIT_LIST_HEAD(&acl->acl_list);
+ INIT_LIST_HEAD(&acl->acl_sess_list);
+ spin_lock_init(&acl->device_list_lock);
+ spin_lock_init(&acl->nacl_sess_lock);
+ atomic_set(&acl->acl_pr_ref_count, 0);
+ acl->queue_depth = queue_depth;
+ snprintf(acl->initiatorname, TRANSPORT_IQN_LEN, "%s", initiatorname);
+ acl->se_tpg = tpg;
+ acl->acl_index = scsi_get_new_index(SCSI_AUTH_INTR_INDEX);
+ spin_lock_init(&acl->stats_lock);
+
+ TPG_TFO(tpg)->set_default_node_attributes(acl);
+
+ if (core_create_device_list_for_node(acl) < 0) {
+ TPG_TFO(tpg)->tpg_release_fabric_acl(tpg, acl);
+ return ERR_PTR(-ENOMEM);
+ }
+
+ if (core_set_queue_depth_for_node(tpg, acl) < 0) {
+ core_free_device_list_for_node(acl, tpg);
+ TPG_TFO(tpg)->tpg_release_fabric_acl(tpg, acl);
+ return ERR_PTR(-EINVAL);
+ }
+
+ spin_lock_bh(&tpg->acl_node_lock);
+ list_add_tail(&acl->acl_list, &tpg->acl_node_list);
+ tpg->num_node_acls++;
+ spin_unlock_bh(&tpg->acl_node_lock);
+
+done:
+ printk(KERN_INFO "%s_TPG[%hu] - Added ACL with TCQ Depth: %d for %s"
+ " Initiator Node: %s\n", TPG_TFO(tpg)->get_fabric_name(),
+ TPG_TFO(tpg)->tpg_get_tag(tpg), acl->queue_depth,
+ TPG_TFO(tpg)->get_fabric_name(), initiatorname);
+
+ return acl;
+}
+EXPORT_SYMBOL(core_tpg_add_initiator_node_acl);
+
+/* core_tpg_del_initiator_node_acl():
+ *
+ *
+ */
+int core_tpg_del_initiator_node_acl(
+ struct se_portal_group *tpg,
+ struct se_node_acl *acl,
+ int force)
+{
+ struct se_session *sess, *sess_tmp;
+ int dynamic_acl = 0;
+
+ spin_lock_bh(&tpg->acl_node_lock);
+ if (acl->dynamic_node_acl) {
+ acl->dynamic_node_acl = 0;
+ dynamic_acl = 1;
+ }
+ list_del(&acl->acl_list);
+ tpg->num_node_acls--;
+ spin_unlock_bh(&tpg->acl_node_lock);
+
+ spin_lock_bh(&tpg->session_lock);
+ list_for_each_entry_safe(sess, sess_tmp,
+ &tpg->tpg_sess_list, sess_list) {
+ if (sess->se_node_acl != acl)
+ continue;
+ /*
+ * Determine if the session needs to be closed by our context.
+ */
+ if (!(TPG_TFO(tpg)->shutdown_session(sess)))
+ continue;
+
+ spin_unlock_bh(&tpg->session_lock);
+ /*
+ * If the $FABRIC_MOD session for the Initiator Node ACL exists,
+ * forcefully shutdown the $FABRIC_MOD session/nexus.
+ */
+ TPG_TFO(tpg)->close_session(sess);
+
+ spin_lock_bh(&tpg->session_lock);
+ }
+ spin_unlock_bh(&tpg->session_lock);
+
+ core_tpg_wait_for_nacl_pr_ref(acl);
+ core_tpg_wait_for_mib_ref(acl);
+ core_clear_initiator_node_from_tpg(acl, tpg);
+ core_free_device_list_for_node(acl, tpg);
+
+ printk(KERN_INFO "%s_TPG[%hu] - Deleted ACL with TCQ Depth: %d for %s"
+ " Initiator Node: %s\n", TPG_TFO(tpg)->get_fabric_name(),
+ TPG_TFO(tpg)->tpg_get_tag(tpg), acl->queue_depth,
+ TPG_TFO(tpg)->get_fabric_name(), acl->initiatorname);
+
+ return 0;
+}
+EXPORT_SYMBOL(core_tpg_del_initiator_node_acl);
+
+/* core_tpg_set_initiator_node_queue_depth():
+ *
+ *
+ */
+int core_tpg_set_initiator_node_queue_depth(
+ struct se_portal_group *tpg,
+ unsigned char *initiatorname,
+ u32 queue_depth,
+ int force)
+{
+ struct se_session *sess, *init_sess = NULL;
+ struct se_node_acl *acl;
+ int dynamic_acl = 0;
+
+ spin_lock_bh(&tpg->acl_node_lock);
+ acl = __core_tpg_get_initiator_node_acl(tpg, initiatorname);
+ if (!(acl)) {
+ printk(KERN_ERR "Access Control List entry for %s Initiator"
+ " Node %s does not exists for TPG %hu, ignoring"
+ " request.\n", TPG_TFO(tpg)->get_fabric_name(),
+ initiatorname, TPG_TFO(tpg)->tpg_get_tag(tpg));
+ spin_unlock_bh(&tpg->acl_node_lock);
+ return -ENODEV;
+ }
+ if (acl->dynamic_node_acl) {
+ acl->dynamic_node_acl = 0;
+ dynamic_acl = 1;
+ }
+ spin_unlock_bh(&tpg->acl_node_lock);
+
+ spin_lock_bh(&tpg->session_lock);
+ list_for_each_entry(sess, &tpg->tpg_sess_list, sess_list) {
+ if (sess->se_node_acl != acl)
+ continue;
+
+ if (!force) {
+ printk(KERN_ERR "Unable to change queue depth for %s"
+ " Initiator Node: %s while session is"
+ " operational. To forcefully change the queue"
+ " depth and force session reinstatement"
+ " use the \"force=1\" parameter.\n",
+ TPG_TFO(tpg)->get_fabric_name(), initiatorname);
+ spin_unlock_bh(&tpg->session_lock);
+
+ spin_lock_bh(&tpg->acl_node_lock);
+ if (dynamic_acl)
+ acl->dynamic_node_acl = 1;
+ spin_unlock_bh(&tpg->acl_node_lock);
+ return -EEXIST;
+ }
+ /*
+ * Determine if the session needs to be closed by our context.
+ */
+ if (!(TPG_TFO(tpg)->shutdown_session(sess)))
+ continue;
+
+ init_sess = sess;
+ break;
+ }
+
+ /*
+ * User has requested to change the queue depth for a Initiator Node.
+ * Change the value in the Node's struct se_node_acl, and call
+ * core_set_queue_depth_for_node() to add the requested queue depth.
+ *
+ * Finally call TPG_TFO(tpg)->close_session() to force session
+ * reinstatement to occur if there is an active session for the
+ * $FABRIC_MOD Initiator Node in question.
+ */
+ acl->queue_depth = queue_depth;
+
+ if (core_set_queue_depth_for_node(tpg, acl) < 0) {
+ spin_unlock_bh(&tpg->session_lock);
+ /*
+ * Force session reinstatement if
+ * core_set_queue_depth_for_node() failed, because we assume
+ * the $FABRIC_MOD has already the set session reinstatement
+ * bit from TPG_TFO(tpg)->shutdown_session() called above.
+ */
+ if (init_sess)
+ TPG_TFO(tpg)->close_session(init_sess);
+
+ spin_lock_bh(&tpg->acl_node_lock);
+ if (dynamic_acl)
+ acl->dynamic_node_acl = 1;
+ spin_unlock_bh(&tpg->acl_node_lock);
+ return -EINVAL;
+ }
+ spin_unlock_bh(&tpg->session_lock);
+ /*
+ * If the $FABRIC_MOD session for the Initiator Node ACL exists,
+ * forcefully shutdown the $FABRIC_MOD session/nexus.
+ */
+ if (init_sess)
+ TPG_TFO(tpg)->close_session(init_sess);
+
+ printk(KERN_INFO "Successfuly changed queue depth to: %d for Initiator"
+ " Node: %s on %s Target Portal Group: %u\n", queue_depth,
+ initiatorname, TPG_TFO(tpg)->get_fabric_name(),
+ TPG_TFO(tpg)->tpg_get_tag(tpg));
+
+ spin_lock_bh(&tpg->acl_node_lock);
+ if (dynamic_acl)
+ acl->dynamic_node_acl = 1;
+ spin_unlock_bh(&tpg->acl_node_lock);
+
+ return 0;
+}
+EXPORT_SYMBOL(core_tpg_set_initiator_node_queue_depth);
+
+static int core_tpg_setup_virtual_lun0(struct se_portal_group *se_tpg)
+{
+ /* Set in core_dev_setup_virtual_lun0() */
+ struct se_device *dev = se_global->g_lun0_dev;
+ struct se_lun *lun = &se_tpg->tpg_virt_lun0;
+ u32 lun_access = TRANSPORT_LUNFLAGS_READ_ONLY;
+ int ret;
+
+ lun->unpacked_lun = 0;
+ lun->lun_status = TRANSPORT_LUN_STATUS_FREE;
+ atomic_set(&lun->lun_acl_count, 0);
+ init_completion(&lun->lun_shutdown_comp);
+ INIT_LIST_HEAD(&lun->lun_acl_list);
+ INIT_LIST_HEAD(&lun->lun_cmd_list);
+ spin_lock_init(&lun->lun_acl_lock);
+ spin_lock_init(&lun->lun_cmd_lock);
+ spin_lock_init(&lun->lun_sep_lock);
+
+ ret = core_tpg_post_addlun(se_tpg, lun, lun_access, dev);
+ if (ret < 0)
+ return -1;
+
+ return 0;
+}
+
+static void core_tpg_release_virtual_lun0(struct se_portal_group *se_tpg)
+{
+ struct se_lun *lun = &se_tpg->tpg_virt_lun0;
+
+ core_tpg_post_dellun(se_tpg, lun);
+}
+
+int core_tpg_register(
+ struct target_core_fabric_ops *tfo,
+ struct se_wwn *se_wwn,
+ struct se_portal_group *se_tpg,
+ void *tpg_fabric_ptr,
+ int se_tpg_type)
+{
+ struct se_lun *lun;
+ u32 i;
+
+ se_tpg->tpg_lun_list = kzalloc((sizeof(struct se_lun) *
+ TRANSPORT_MAX_LUNS_PER_TPG), GFP_KERNEL);
+ if (!(se_tpg->tpg_lun_list)) {
+ printk(KERN_ERR "Unable to allocate struct se_portal_group->"
+ "tpg_lun_list\n");
+ return -ENOMEM;
+ }
+
+ for (i = 0; i < TRANSPORT_MAX_LUNS_PER_TPG; i++) {
+ lun = &se_tpg->tpg_lun_list[i];
+ lun->unpacked_lun = i;
+ lun->lun_status = TRANSPORT_LUN_STATUS_FREE;
+ atomic_set(&lun->lun_acl_count, 0);
+ init_completion(&lun->lun_shutdown_comp);
+ INIT_LIST_HEAD(&lun->lun_acl_list);
+ INIT_LIST_HEAD(&lun->lun_cmd_list);
+ spin_lock_init(&lun->lun_acl_lock);
+ spin_lock_init(&lun->lun_cmd_lock);
+ spin_lock_init(&lun->lun_sep_lock);
+ }
+
+ se_tpg->se_tpg_type = se_tpg_type;
+ se_tpg->se_tpg_fabric_ptr = tpg_fabric_ptr;
+ se_tpg->se_tpg_tfo = tfo;
+ se_tpg->se_tpg_wwn = se_wwn;
+ atomic_set(&se_tpg->tpg_pr_ref_count, 0);
+ INIT_LIST_HEAD(&se_tpg->acl_node_list);
+ INIT_LIST_HEAD(&se_tpg->se_tpg_list);
+ INIT_LIST_HEAD(&se_tpg->tpg_sess_list);
+ spin_lock_init(&se_tpg->acl_node_lock);
+ spin_lock_init(&se_tpg->session_lock);
+ spin_lock_init(&se_tpg->tpg_lun_lock);
+
+ if (se_tpg->se_tpg_type == TRANSPORT_TPG_TYPE_NORMAL) {
+ if (core_tpg_setup_virtual_lun0(se_tpg) < 0) {
+ kfree(se_tpg);
+ return -ENOMEM;
+ }
+ }
+
+ spin_lock_bh(&se_global->se_tpg_lock);
+ list_add_tail(&se_tpg->se_tpg_list, &se_global->g_se_tpg_list);
+ spin_unlock_bh(&se_global->se_tpg_lock);
+
+ printk(KERN_INFO "TARGET_CORE[%s]: Allocated %s struct se_portal_group for"
+ " endpoint: %s, Portal Tag: %u\n", tfo->get_fabric_name(),
+ (se_tpg->se_tpg_type == TRANSPORT_TPG_TYPE_NORMAL) ?
+ "Normal" : "Discovery", (tfo->tpg_get_wwn(se_tpg) == NULL) ?
+ "None" : tfo->tpg_get_wwn(se_tpg), tfo->tpg_get_tag(se_tpg));
+
+ return 0;
+}
+EXPORT_SYMBOL(core_tpg_register);
+
+int core_tpg_deregister(struct se_portal_group *se_tpg)
+{
+ printk(KERN_INFO "TARGET_CORE[%s]: Deallocating %s struct se_portal_group"
+ " for endpoint: %s Portal Tag %u\n",
+ (se_tpg->se_tpg_type == TRANSPORT_TPG_TYPE_NORMAL) ?
+ "Normal" : "Discovery", TPG_TFO(se_tpg)->get_fabric_name(),
+ TPG_TFO(se_tpg)->tpg_get_wwn(se_tpg),
+ TPG_TFO(se_tpg)->tpg_get_tag(se_tpg));
+
+ spin_lock_bh(&se_global->se_tpg_lock);
+ list_del(&se_tpg->se_tpg_list);
+ spin_unlock_bh(&se_global->se_tpg_lock);
+
+ while (atomic_read(&se_tpg->tpg_pr_ref_count) != 0)
+ cpu_relax();
+
+ if (se_tpg->se_tpg_type == TRANSPORT_TPG_TYPE_NORMAL)
+ core_tpg_release_virtual_lun0(se_tpg);
+
+ se_tpg->se_tpg_fabric_ptr = NULL;
+ kfree(se_tpg->tpg_lun_list);
+ return 0;
+}
+EXPORT_SYMBOL(core_tpg_deregister);
+
+struct se_lun *core_tpg_pre_addlun(
+ struct se_portal_group *tpg,
+ u32 unpacked_lun)
+{
+ struct se_lun *lun;
+
+ if (unpacked_lun > (TRANSPORT_MAX_LUNS_PER_TPG-1)) {
+ printk(KERN_ERR "%s LUN: %u exceeds TRANSPORT_MAX_LUNS_PER_TPG"
+ "-1: %u for Target Portal Group: %u\n",
+ TPG_TFO(tpg)->get_fabric_name(),
+ unpacked_lun, TRANSPORT_MAX_LUNS_PER_TPG-1,
+ TPG_TFO(tpg)->tpg_get_tag(tpg));
+ return ERR_PTR(-EOVERFLOW);
+ }
+
+ spin_lock(&tpg->tpg_lun_lock);
+ lun = &tpg->tpg_lun_list[unpacked_lun];
+ if (lun->lun_status == TRANSPORT_LUN_STATUS_ACTIVE) {
+ printk(KERN_ERR "TPG Logical Unit Number: %u is already active"
+ " on %s Target Portal Group: %u, ignoring request.\n",
+ unpacked_lun, TPG_TFO(tpg)->get_fabric_name(),
+ TPG_TFO(tpg)->tpg_get_tag(tpg));
+ spin_unlock(&tpg->tpg_lun_lock);
+ return ERR_PTR(-EINVAL);
+ }
+ spin_unlock(&tpg->tpg_lun_lock);
+
+ return lun;
+}
+
+int core_tpg_post_addlun(
+ struct se_portal_group *tpg,
+ struct se_lun *lun,
+ u32 lun_access,
+ void *lun_ptr)
+{
+ if (core_dev_export(lun_ptr, tpg, lun) < 0)
+ return -1;
+
+ spin_lock(&tpg->tpg_lun_lock);
+ lun->lun_access = lun_access;
+ lun->lun_status = TRANSPORT_LUN_STATUS_ACTIVE;
+ spin_unlock(&tpg->tpg_lun_lock);
+
+ return 0;
+}
+
+static void core_tpg_shutdown_lun(
+ struct se_portal_group *tpg,
+ struct se_lun *lun)
+{
+ core_clear_lun_from_tpg(lun, tpg);
+ transport_clear_lun_from_sessions(lun);
+}
+
+struct se_lun *core_tpg_pre_dellun(
+ struct se_portal_group *tpg,
+ u32 unpacked_lun,
+ int *ret)
+{
+ struct se_lun *lun;
+
+ if (unpacked_lun > (TRANSPORT_MAX_LUNS_PER_TPG-1)) {
+ printk(KERN_ERR "%s LUN: %u exceeds TRANSPORT_MAX_LUNS_PER_TPG"
+ "-1: %u for Target Portal Group: %u\n",
+ TPG_TFO(tpg)->get_fabric_name(), unpacked_lun,
+ TRANSPORT_MAX_LUNS_PER_TPG-1,
+ TPG_TFO(tpg)->tpg_get_tag(tpg));
+ return ERR_PTR(-EOVERFLOW);
+ }
+
+ spin_lock(&tpg->tpg_lun_lock);
+ lun = &tpg->tpg_lun_list[unpacked_lun];
+ if (lun->lun_status != TRANSPORT_LUN_STATUS_ACTIVE) {
+ printk(KERN_ERR "%s Logical Unit Number: %u is not active on"
+ " Target Portal Group: %u, ignoring request.\n",
+ TPG_TFO(tpg)->get_fabric_name(), unpacked_lun,
+ TPG_TFO(tpg)->tpg_get_tag(tpg));
+ spin_unlock(&tpg->tpg_lun_lock);
+ return ERR_PTR(-ENODEV);
+ }
+ spin_unlock(&tpg->tpg_lun_lock);
+
+ return lun;
+}
+
+int core_tpg_post_dellun(
+ struct se_portal_group *tpg,
+ struct se_lun *lun)
+{
+ core_tpg_shutdown_lun(tpg, lun);
+
+ core_dev_unexport(lun->lun_se_dev, tpg, lun);
+
+ spin_lock(&tpg->tpg_lun_lock);
+ lun->lun_status = TRANSPORT_LUN_STATUS_FREE;
+ spin_unlock(&tpg->tpg_lun_lock);
+
+ return 0;
+}
diff --git a/include/target/target_core_tpg.h b/include/target/target_core_tpg.h
new file mode 100644
index 0000000..77e1872
--- /dev/null
+++ b/include/target/target_core_tpg.h
@@ -0,0 +1,35 @@
+#ifndef TARGET_CORE_TPG_H
+#define TARGET_CORE_TPG_H
+
+extern struct se_node_acl *__core_tpg_get_initiator_node_acl(struct se_portal_group *tpg,
+ const char *);
+extern struct se_node_acl *core_tpg_get_initiator_node_acl(struct se_portal_group *tpg,
+ unsigned char *);
+extern void core_tpg_add_node_to_devs(struct se_node_acl *,
+ struct se_portal_group *);
+extern struct se_node_acl *core_tpg_check_initiator_node_acl(
+ struct se_portal_group *,
+ unsigned char *);
+extern void core_tpg_wait_for_nacl_pr_ref(struct se_node_acl *);
+extern void core_tpg_wait_for_mib_ref(struct se_node_acl *);
+extern void core_tpg_clear_object_luns(struct se_portal_group *);
+extern struct se_node_acl *core_tpg_add_initiator_node_acl(
+ struct se_portal_group *,
+ struct se_node_acl *,
+ const char *, u32);
+extern int core_tpg_del_initiator_node_acl(struct se_portal_group *,
+ struct se_node_acl *, int);
+extern int core_tpg_set_initiator_node_queue_depth(struct se_portal_group *,
+ unsigned char *, u32, int);
+extern int core_tpg_register(struct target_core_fabric_ops *,
+ struct se_wwn *,
+ struct se_portal_group *, void *,
+ int);
+extern int core_tpg_deregister(struct se_portal_group *);
+extern struct se_lun *core_tpg_pre_addlun(struct se_portal_group *, u32);
+extern int core_tpg_post_addlun(struct se_portal_group *, struct se_lun *, u32,
+ void *);
+extern struct se_lun *core_tpg_pre_dellun(struct se_portal_group *, u32, int *);
+extern int core_tpg_post_dellun(struct se_portal_group *, struct se_lun *);
+
+#endif /* TARGET_CORE_TPG_H */
--
1.7.3.4
^ permalink raw reply related [flat|nested] 22+ messages in thread* [PATCH v2 02i/03] target: Add SPC-4 compliant Persistent Reservations (PR)
2010-12-17 21:11 [PATCH v2 00/03] target: Initial merge of v4.0.0-rc6 for .38 Nicholas A. Bellinger
` (8 preceding siblings ...)
2010-12-17 21:11 ` [PATCH v2 02h/03] target: Add target portal group infrastructure Nicholas A. Bellinger
@ 2010-12-17 21:11 ` Nicholas A. Bellinger
2010-12-17 21:11 ` [PATCH v2 02j/03] target: Add Task Management infrastructure Nicholas A. Bellinger
` (10 subsequent siblings)
20 siblings, 0 replies; 22+ messages in thread
From: Nicholas A. Bellinger @ 2010-12-17 21:11 UTC (permalink / raw)
To: linux-scsi, James Bottomley; +Cc: Nicholas Bellinger
From: Nicholas Bellinger <nab@linux-iscsi.org>
This patch adds exhaustive support for SPC-4 compliant persistent reservations for
target_core_mod/ConfigFS storage objects. This includes all supported PROUT/PRIN Service
Actions and feature bits including SPEC_I_PORT=1 and APTPL=1
Please see the following for more information:
http://www.linux-iscsi.org/index.php/Persistent_Reservations
Signed-off-by: Nicholas A. Bellinger <nab@linux-iscsi.org>
---
drivers/target/target_core_pr.c | 4251 +++++++++++++++++++++++++++++++++++++++
drivers/target/target_core_pr.h | 67 +
2 files changed, 4318 insertions(+), 0 deletions(-)
create mode 100644 drivers/target/target_core_pr.c
create mode 100644 drivers/target/target_core_pr.h
diff --git a/drivers/target/target_core_pr.c b/drivers/target/target_core_pr.c
new file mode 100644
index 0000000..53cd8f0
--- /dev/null
+++ b/drivers/target/target_core_pr.c
@@ -0,0 +1,4251 @@
+/*******************************************************************************
+ * Filename: target_core_pr.c
+ *
+ * This file contains SPC-3 compliant persistent reservations and
+ * legacy SPC-2 reservations with compatible reservation handling (CRH=1)
+ *
+ * Copyright (c) 2009, 2010 Rising Tide Systems
+ * Copyright (c) 2009, 2010 Linux-iSCSI.org
+ *
+ * Nicholas A. Bellinger <nab@kernel.org>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+ *
+ ******************************************************************************/
+
+#include <linux/version.h>
+#include <linux/slab.h>
+#include <linux/spinlock.h>
+#include <linux/list.h>
+#include <scsi/scsi.h>
+#include <scsi/scsi_cmnd.h>
+#include <asm/unaligned.h>
+
+#include <target/target_core_base.h>
+#include <target/target_core_device.h>
+#include <target/target_core_tmr.h>
+#include <target/target_core_tpg.h>
+#include <target/target_core_transport.h>
+#include <target/target_core_fabric_ops.h>
+#include <target/target_core_configfs.h>
+
+#include "target_core_hba.h"
+#include "target_core_pr.h"
+#include "target_core_ua.h"
+
+/*
+ * Used for Specify Initiator Ports Capable Bit (SPEC_I_PT)
+ */
+struct pr_transport_id_holder {
+ int dest_local_nexus;
+ struct t10_pr_registration *dest_pr_reg;
+ struct se_portal_group *dest_tpg;
+ struct se_node_acl *dest_node_acl;
+ struct se_dev_entry *dest_se_deve;
+ struct list_head dest_list;
+};
+
+int core_pr_dump_initiator_port(
+ struct t10_pr_registration *pr_reg,
+ char *buf,
+ u32 size)
+{
+ if (!(pr_reg->isid_present_at_reg))
+ return 0;
+
+ snprintf(buf, size, ",i,0x%s", &pr_reg->pr_reg_isid[0]);
+ return 1;
+}
+
+static void __core_scsi3_complete_pro_release(struct se_device *, struct se_node_acl *,
+ struct t10_pr_registration *, int);
+
+static int core_scsi2_reservation_seq_non_holder(
+ struct se_cmd *cmd,
+ unsigned char *cdb,
+ u32 pr_reg_type)
+{
+ switch (cdb[0]) {
+ case INQUIRY:
+ case RELEASE:
+ case RELEASE_10:
+ return 0;
+ default:
+ return 1;
+ }
+
+ return 1;
+}
+
+static int core_scsi2_reservation_check(struct se_cmd *cmd, u32 *pr_reg_type)
+{
+ struct se_device *dev = cmd->se_dev;
+ struct se_session *sess = cmd->se_sess;
+ int ret;
+
+ if (!(sess))
+ return 0;
+
+ spin_lock(&dev->dev_reservation_lock);
+ if (!dev->dev_reserved_node_acl || !sess) {
+ spin_unlock(&dev->dev_reservation_lock);
+ return 0;
+ }
+ if (dev->dev_reserved_node_acl != sess->se_node_acl) {
+ spin_unlock(&dev->dev_reservation_lock);
+ return -1;
+ }
+ if (!(dev->dev_flags & DF_SPC2_RESERVATIONS_WITH_ISID)) {
+ spin_unlock(&dev->dev_reservation_lock);
+ return 0;
+ }
+ ret = (dev->dev_res_bin_isid == sess->sess_bin_isid) ? 0 : -1;
+ spin_unlock(&dev->dev_reservation_lock);
+
+ return ret;
+}
+
+static int core_scsi2_reservation_release(struct se_cmd *cmd)
+{
+ struct se_device *dev = cmd->se_dev;
+ struct se_session *sess = cmd->se_sess;
+ struct se_portal_group *tpg = sess->se_tpg;
+
+ if (!(sess) || !(tpg))
+ return 0;
+
+ spin_lock(&dev->dev_reservation_lock);
+ if (!dev->dev_reserved_node_acl || !sess) {
+ spin_unlock(&dev->dev_reservation_lock);
+ return 0;
+ }
+
+ if (dev->dev_reserved_node_acl != sess->se_node_acl) {
+ spin_unlock(&dev->dev_reservation_lock);
+ return 0;
+ }
+ dev->dev_reserved_node_acl = NULL;
+ dev->dev_flags &= ~DF_SPC2_RESERVATIONS;
+ if (dev->dev_flags & DF_SPC2_RESERVATIONS_WITH_ISID) {
+ dev->dev_res_bin_isid = 0;
+ dev->dev_flags &= ~DF_SPC2_RESERVATIONS_WITH_ISID;
+ }
+ printk(KERN_INFO "SCSI-2 Released reservation for %s LUN: %u ->"
+ " MAPPED LUN: %u for %s\n", TPG_TFO(tpg)->get_fabric_name(),
+ SE_LUN(cmd)->unpacked_lun, cmd->se_deve->mapped_lun,
+ sess->se_node_acl->initiatorname);
+ spin_unlock(&dev->dev_reservation_lock);
+
+ return 0;
+}
+
+static int core_scsi2_reservation_reserve(struct se_cmd *cmd)
+{
+ struct se_device *dev = cmd->se_dev;
+ struct se_session *sess = cmd->se_sess;
+ struct se_portal_group *tpg = sess->se_tpg;
+
+ if ((T_TASK(cmd)->t_task_cdb[1] & 0x01) &&
+ (T_TASK(cmd)->t_task_cdb[1] & 0x02)) {
+ printk(KERN_ERR "LongIO and Obselete Bits set, returning"
+ " ILLEGAL_REQUEST\n");
+ return PYX_TRANSPORT_ILLEGAL_REQUEST;
+ }
+ /*
+ * This is currently the case for target_core_mod passthrough struct se_cmd
+ * ops
+ */
+ if (!(sess) || !(tpg))
+ return 0;
+
+ spin_lock(&dev->dev_reservation_lock);
+ if (dev->dev_reserved_node_acl &&
+ (dev->dev_reserved_node_acl != sess->se_node_acl)) {
+ printk(KERN_ERR "SCSI-2 RESERVATION CONFLIFT for %s fabric\n",
+ TPG_TFO(tpg)->get_fabric_name());
+ printk(KERN_ERR "Original reserver LUN: %u %s\n",
+ SE_LUN(cmd)->unpacked_lun,
+ dev->dev_reserved_node_acl->initiatorname);
+ printk(KERN_ERR "Current attempt - LUN: %u -> MAPPED LUN: %u"
+ " from %s \n", SE_LUN(cmd)->unpacked_lun,
+ cmd->se_deve->mapped_lun,
+ sess->se_node_acl->initiatorname);
+ spin_unlock(&dev->dev_reservation_lock);
+ return PYX_TRANSPORT_RESERVATION_CONFLICT;
+ }
+
+ dev->dev_reserved_node_acl = sess->se_node_acl;
+ dev->dev_flags |= DF_SPC2_RESERVATIONS;
+ if (sess->sess_bin_isid != 0) {
+ dev->dev_res_bin_isid = sess->sess_bin_isid;
+ dev->dev_flags |= DF_SPC2_RESERVATIONS_WITH_ISID;
+ }
+ printk(KERN_INFO "SCSI-2 Reserved %s LUN: %u -> MAPPED LUN: %u"
+ " for %s\n", TPG_TFO(tpg)->get_fabric_name(),
+ SE_LUN(cmd)->unpacked_lun, cmd->se_deve->mapped_lun,
+ sess->se_node_acl->initiatorname);
+ spin_unlock(&dev->dev_reservation_lock);
+
+ return 0;
+}
+
+static struct t10_pr_registration *core_scsi3_locate_pr_reg(struct se_device *,
+ struct se_node_acl *, struct se_session *);
+static void core_scsi3_put_pr_reg(struct t10_pr_registration *);
+
+/*
+ * Setup in target_core_transport.c:transport_generic_cmd_sequencer()
+ * and called via struct se_cmd->transport_emulate_cdb() in TCM processing
+ * thread context.
+ */
+int core_scsi2_emulate_crh(struct se_cmd *cmd)
+{
+ struct se_session *se_sess = cmd->se_sess;
+ struct se_subsystem_dev *su_dev = cmd->se_dev->se_sub_dev;
+ struct t10_pr_registration *pr_reg;
+ struct t10_reservation_template *pr_tmpl = &su_dev->t10_reservation;
+ unsigned char *cdb = &T_TASK(cmd)->t_task_cdb[0];
+ int crh = (T10_RES(su_dev)->res_type == SPC3_PERSISTENT_RESERVATIONS);
+ int conflict = 0;
+
+ if (!(se_sess))
+ return 0;
+
+ if (!(crh))
+ goto after_crh;
+
+ pr_reg = core_scsi3_locate_pr_reg(cmd->se_dev, se_sess->se_node_acl,
+ se_sess);
+ if (pr_reg) {
+ /*
+ * From spc4r17 5.7.3 Exceptions to SPC-2 RESERVE and RELEASE
+ * behavior
+ *
+ * A RESERVE(6) or RESERVE(10) command shall complete with GOOD
+ * status, but no reservation shall be established and the
+ * persistent reservation shall not be changed, if the command
+ * is received from a) and b) below.
+ *
+ * A RELEASE(6) or RELEASE(10) command shall complete with GOOD
+ * status, but the persistent reservation shall not be released,
+ * if the command is received from a) and b)
+ *
+ * a) An I_T nexus that is a persistent reservation holder; or
+ * b) An I_T nexus that is registered if a registrants only or
+ * all registrants type persistent reservation is present.
+ *
+ * In all other cases, a RESERVE(6) command, RESERVE(10) command,
+ * RELEASE(6) command, or RELEASE(10) command shall be processed
+ * as defined in SPC-2.
+ */
+ if (pr_reg->pr_res_holder) {
+ core_scsi3_put_pr_reg(pr_reg);
+ return 0;
+ }
+ if ((pr_reg->pr_res_type == PR_TYPE_WRITE_EXCLUSIVE_REGONLY) ||
+ (pr_reg->pr_res_type == PR_TYPE_EXCLUSIVE_ACCESS_REGONLY) ||
+ (pr_reg->pr_res_type == PR_TYPE_WRITE_EXCLUSIVE_ALLREG) ||
+ (pr_reg->pr_res_type == PR_TYPE_EXCLUSIVE_ACCESS_ALLREG)) {
+ core_scsi3_put_pr_reg(pr_reg);
+ return 0;
+ }
+ core_scsi3_put_pr_reg(pr_reg);
+ conflict = 1;
+ } else {
+ /*
+ * Following spc2r20 5.5.1 Reservations overview:
+ *
+ * If a logical unit has executed a PERSISTENT RESERVE OUT
+ * command with the REGISTER or the REGISTER AND IGNORE
+ * EXISTING KEY service action and is still registered by any
+ * initiator, all RESERVE commands and all RELEASE commands
+ * regardless of initiator shall conflict and shall terminate
+ * with a RESERVATION CONFLICT status.
+ */
+ spin_lock(&pr_tmpl->registration_lock);
+ conflict = (list_empty(&pr_tmpl->registration_list)) ? 0 : 1;
+ spin_unlock(&pr_tmpl->registration_lock);
+ }
+
+ if (conflict) {
+ printk(KERN_ERR "Received legacy SPC-2 RESERVE/RELEASE"
+ " while active SPC-3 registrations exist,"
+ " returning RESERVATION_CONFLICT\n");
+ return PYX_TRANSPORT_RESERVATION_CONFLICT;
+ }
+
+after_crh:
+ if ((cdb[0] == RESERVE) || (cdb[0] == RESERVE_10))
+ return core_scsi2_reservation_reserve(cmd);
+ else if ((cdb[0] == RELEASE) || (cdb[0] == RELEASE_10))
+ return core_scsi2_reservation_release(cmd);
+ else
+ return PYX_TRANSPORT_INVALID_CDB_FIELD;
+}
+
+/*
+ * Begin SPC-3/SPC-4 Persistent Reservations emulation support
+ *
+ * This function is called by those initiator ports who are *NOT*
+ * the active PR reservation holder when a reservation is present.
+ */
+static int core_scsi3_pr_seq_non_holder(
+ struct se_cmd *cmd,
+ unsigned char *cdb,
+ u32 pr_reg_type)
+{
+ struct se_dev_entry *se_deve;
+ struct se_session *se_sess = SE_SESS(cmd);
+ int other_cdb = 0, ignore_reg;
+ int registered_nexus = 0, ret = 1; /* Conflict by default */
+ int all_reg = 0, reg_only = 0; /* ALL_REG, REG_ONLY */
+ int we = 0; /* Write Exclusive */
+ int legacy = 0; /* Act like a legacy device and return
+ * RESERVATION CONFLICT on some CDBs */
+ /*
+ * A legacy SPC-2 reservation is being held.
+ */
+ if (cmd->se_dev->dev_flags & DF_SPC2_RESERVATIONS)
+ return core_scsi2_reservation_seq_non_holder(cmd,
+ cdb, pr_reg_type);
+
+ se_deve = &se_sess->se_node_acl->device_list[cmd->orig_fe_lun];
+ /*
+ * Determine if the registration should be ignored due to
+ * non-matching ISIDs in core_scsi3_pr_reservation_check().
+ */
+ ignore_reg = (pr_reg_type & 0x80000000);
+ if (ignore_reg)
+ pr_reg_type &= ~0x80000000;
+
+ switch (pr_reg_type) {
+ case PR_TYPE_WRITE_EXCLUSIVE:
+ we = 1;
+ case PR_TYPE_EXCLUSIVE_ACCESS:
+ /*
+ * Some commands are only allowed for the persistent reservation
+ * holder.
+ */
+ if ((se_deve->def_pr_registered) && !(ignore_reg))
+ registered_nexus = 1;
+ break;
+ case PR_TYPE_WRITE_EXCLUSIVE_REGONLY:
+ we = 1;
+ case PR_TYPE_EXCLUSIVE_ACCESS_REGONLY:
+ /*
+ * Some commands are only allowed for registered I_T Nexuses.
+ */
+ reg_only = 1;
+ if ((se_deve->def_pr_registered) && !(ignore_reg))
+ registered_nexus = 1;
+ break;
+ case PR_TYPE_WRITE_EXCLUSIVE_ALLREG:
+ we = 1;
+ case PR_TYPE_EXCLUSIVE_ACCESS_ALLREG:
+ /*
+ * Each registered I_T Nexus is a reservation holder.
+ */
+ all_reg = 1;
+ if ((se_deve->def_pr_registered) && !(ignore_reg))
+ registered_nexus = 1;
+ break;
+ default:
+ return -1;
+ }
+ /*
+ * Referenced from spc4r17 table 45 for *NON* PR holder access
+ */
+ switch (cdb[0]) {
+ case SECURITY_PROTOCOL_IN:
+ if (registered_nexus)
+ return 0;
+ ret = (we) ? 0 : 1;
+ break;
+ case MODE_SENSE:
+ case MODE_SENSE_10:
+ case READ_ATTRIBUTE:
+ case READ_BUFFER:
+ case RECEIVE_DIAGNOSTIC:
+ if (legacy) {
+ ret = 1;
+ break;
+ }
+ if (registered_nexus) {
+ ret = 0;
+ break;
+ }
+ ret = (we) ? 0 : 1; /* Allowed Write Exclusive */
+ break;
+ case PERSISTENT_RESERVE_OUT:
+ /*
+ * This follows PERSISTENT_RESERVE_OUT service actions that
+ * are allowed in the presence of various reservations.
+ * See spc4r17, table 46
+ */
+ switch (cdb[1] & 0x1f) {
+ case PRO_CLEAR:
+ case PRO_PREEMPT:
+ case PRO_PREEMPT_AND_ABORT:
+ ret = (registered_nexus) ? 0 : 1;
+ break;
+ case PRO_REGISTER:
+ case PRO_REGISTER_AND_IGNORE_EXISTING_KEY:
+ ret = 0;
+ break;
+ case PRO_REGISTER_AND_MOVE:
+ case PRO_RESERVE:
+ ret = 1;
+ break;
+ case PRO_RELEASE:
+ ret = (registered_nexus) ? 0 : 1;
+ break;
+ default:
+ printk(KERN_ERR "Unknown PERSISTENT_RESERVE_OUT service"
+ " action: 0x%02x\n", cdb[1] & 0x1f);
+ return -1;
+ }
+ break;
+ case RELEASE:
+ case RELEASE_10:
+ /* Handled by CRH=1 in core_scsi2_emulate_crh() */
+ ret = 0;
+ break;
+ case RESERVE:
+ case RESERVE_10:
+ /* Handled by CRH=1 in core_scsi2_emulate_crh() */
+ ret = 0;
+ break;
+ case TEST_UNIT_READY:
+ ret = (legacy) ? 1 : 0; /* Conflict for legacy */
+ break;
+ case MAINTENANCE_IN:
+ switch (cdb[1] & 0x1f) {
+ case MI_MANAGEMENT_PROTOCOL_IN:
+ if (registered_nexus) {
+ ret = 0;
+ break;
+ }
+ ret = (we) ? 0 : 1; /* Allowed Write Exclusive */
+ break;
+ case MI_REPORT_SUPPORTED_OPERATION_CODES:
+ case MI_REPORT_SUPPORTED_TASK_MANAGEMENT_FUNCTIONS:
+ if (legacy) {
+ ret = 1;
+ break;
+ }
+ if (registered_nexus) {
+ ret = 0;
+ break;
+ }
+ ret = (we) ? 0 : 1; /* Allowed Write Exclusive */
+ break;
+ case MI_REPORT_ALIASES:
+ case MI_REPORT_IDENTIFYING_INFORMATION:
+ case MI_REPORT_PRIORITY:
+ case MI_REPORT_TARGET_PGS:
+ case MI_REPORT_TIMESTAMP:
+ ret = 0; /* Allowed */
+ break;
+ default:
+ printk(KERN_ERR "Unknown MI Service Action: 0x%02x\n",
+ (cdb[1] & 0x1f));
+ return -1;
+ }
+ break;
+ case ACCESS_CONTROL_IN:
+ case ACCESS_CONTROL_OUT:
+ case INQUIRY:
+ case LOG_SENSE:
+ case READ_MEDIA_SERIAL_NUMBER:
+ case REPORT_LUNS:
+ case REQUEST_SENSE:
+ ret = 0; /*/ Allowed CDBs */
+ break;
+ default:
+ other_cdb = 1;
+ break;
+ }
+ /*
+ * Case where the CDB is explictly allowed in the above switch
+ * statement.
+ */
+ if (!(ret) && !(other_cdb)) {
+#if 0
+ printk(KERN_INFO "Allowing explict CDB: 0x%02x for %s"
+ " reservation holder\n", cdb[0],
+ core_scsi3_pr_dump_type(pr_reg_type));
+#endif
+ return ret;
+ }
+ /*
+ * Check if write exclusive initiator ports *NOT* holding the
+ * WRITE_EXCLUSIVE_* reservation.
+ */
+ if ((we) && !(registered_nexus)) {
+ if (cmd->data_direction == DMA_TO_DEVICE) {
+ /*
+ * Conflict for write exclusive
+ */
+ printk(KERN_INFO "%s Conflict for unregistered nexus"
+ " %s CDB: 0x%02x to %s reservation\n",
+ transport_dump_cmd_direction(cmd),
+ se_sess->se_node_acl->initiatorname, cdb[0],
+ core_scsi3_pr_dump_type(pr_reg_type));
+ return 1;
+ } else {
+ /*
+ * Allow non WRITE CDBs for all Write Exclusive
+ * PR TYPEs to pass for registered and
+ * non-registered_nexuxes NOT holding the reservation.
+ *
+ * We only make noise for the unregisterd nexuses,
+ * as we expect registered non-reservation holding
+ * nexuses to issue CDBs.
+ */
+#if 0
+ if (!(registered_nexus)) {
+ printk(KERN_INFO "Allowing implict CDB: 0x%02x"
+ " for %s reservation on unregistered"
+ " nexus\n", cdb[0],
+ core_scsi3_pr_dump_type(pr_reg_type));
+ }
+#endif
+ return 0;
+ }
+ } else if ((reg_only) || (all_reg)) {
+ if (registered_nexus) {
+ /*
+ * For PR_*_REG_ONLY and PR_*_ALL_REG reservations,
+ * allow commands from registered nexuses.
+ */
+#if 0
+ printk(KERN_INFO "Allowing implict CDB: 0x%02x for %s"
+ " reservation\n", cdb[0],
+ core_scsi3_pr_dump_type(pr_reg_type));
+#endif
+ return 0;
+ }
+ }
+ printk(KERN_INFO "%s Conflict for %sregistered nexus %s CDB: 0x%2x"
+ " for %s reservation\n", transport_dump_cmd_direction(cmd),
+ (registered_nexus) ? "" : "un",
+ se_sess->se_node_acl->initiatorname, cdb[0],
+ core_scsi3_pr_dump_type(pr_reg_type));
+
+ return 1; /* Conflict by default */
+}
+
+static u32 core_scsi3_pr_generation(struct se_device *dev)
+{
+ struct se_subsystem_dev *su_dev = SU_DEV(dev);
+ u32 prg;
+ /*
+ * PRGeneration field shall contain the value of a 32-bit wrapping
+ * counter mainted by the device server.
+ *
+ * Note that this is done regardless of Active Persist across
+ * Target PowerLoss (APTPL)
+ *
+ * See spc4r17 section 6.3.12 READ_KEYS service action
+ */
+ spin_lock(&dev->dev_reservation_lock);
+ prg = T10_RES(su_dev)->pr_generation++;
+ spin_unlock(&dev->dev_reservation_lock);
+
+ return prg;
+}
+
+static int core_scsi3_pr_reservation_check(
+ struct se_cmd *cmd,
+ u32 *pr_reg_type)
+{
+ struct se_device *dev = cmd->se_dev;
+ struct se_session *sess = cmd->se_sess;
+ int ret;
+
+ if (!(sess))
+ return 0;
+ /*
+ * A legacy SPC-2 reservation is being held.
+ */
+ if (dev->dev_flags & DF_SPC2_RESERVATIONS)
+ return core_scsi2_reservation_check(cmd, pr_reg_type);
+
+ spin_lock(&dev->dev_reservation_lock);
+ if (!(dev->dev_pr_res_holder)) {
+ spin_unlock(&dev->dev_reservation_lock);
+ return 0;
+ }
+ *pr_reg_type = dev->dev_pr_res_holder->pr_res_type;
+ cmd->pr_res_key = dev->dev_pr_res_holder->pr_res_key;
+ if (dev->dev_pr_res_holder->pr_reg_nacl != sess->se_node_acl) {
+ spin_unlock(&dev->dev_reservation_lock);
+ return -1;
+ }
+ if (!(dev->dev_pr_res_holder->isid_present_at_reg)) {
+ spin_unlock(&dev->dev_reservation_lock);
+ return 0;
+ }
+ ret = (dev->dev_pr_res_holder->pr_reg_bin_isid ==
+ sess->sess_bin_isid) ? 0 : -1;
+ /*
+ * Use bit in *pr_reg_type to notify ISID mismatch in
+ * core_scsi3_pr_seq_non_holder().
+ */
+ if (ret != 0)
+ *pr_reg_type |= 0x80000000;
+ spin_unlock(&dev->dev_reservation_lock);
+
+ return ret;
+}
+
+static struct t10_pr_registration *__core_scsi3_do_alloc_registration(
+ struct se_device *dev,
+ struct se_node_acl *nacl,
+ struct se_dev_entry *deve,
+ unsigned char *isid,
+ u64 sa_res_key,
+ int all_tg_pt,
+ int aptpl)
+{
+ struct se_subsystem_dev *su_dev = SU_DEV(dev);
+ struct t10_pr_registration *pr_reg;
+
+ pr_reg = kmem_cache_zalloc(t10_pr_reg_cache, GFP_ATOMIC);
+ if (!(pr_reg)) {
+ printk(KERN_ERR "Unable to allocate struct t10_pr_registration\n");
+ return NULL;
+ }
+
+ pr_reg->pr_aptpl_buf = kzalloc(T10_RES(su_dev)->pr_aptpl_buf_len,
+ GFP_ATOMIC);
+ if (!(pr_reg->pr_aptpl_buf)) {
+ printk(KERN_ERR "Unable to allocate pr_reg->pr_aptpl_buf\n");
+ kmem_cache_free(t10_pr_reg_cache, pr_reg);
+ return NULL;
+ }
+
+ INIT_LIST_HEAD(&pr_reg->pr_reg_list);
+ INIT_LIST_HEAD(&pr_reg->pr_reg_abort_list);
+ INIT_LIST_HEAD(&pr_reg->pr_reg_aptpl_list);
+ INIT_LIST_HEAD(&pr_reg->pr_reg_atp_list);
+ INIT_LIST_HEAD(&pr_reg->pr_reg_atp_mem_list);
+ atomic_set(&pr_reg->pr_res_holders, 0);
+ pr_reg->pr_reg_nacl = nacl;
+ pr_reg->pr_reg_deve = deve;
+ pr_reg->pr_res_mapped_lun = deve->mapped_lun;
+ pr_reg->pr_aptpl_target_lun = deve->se_lun->unpacked_lun;
+ pr_reg->pr_res_key = sa_res_key;
+ pr_reg->pr_reg_all_tg_pt = all_tg_pt;
+ pr_reg->pr_reg_aptpl = aptpl;
+ pr_reg->pr_reg_tg_pt_lun = deve->se_lun;
+ /*
+ * If an ISID value for this SCSI Initiator Port exists,
+ * save it to the registration now.
+ */
+ if (isid != NULL) {
+ pr_reg->pr_reg_bin_isid = get_unaligned_be64(isid);
+ snprintf(pr_reg->pr_reg_isid, PR_REG_ISID_LEN, "%s", isid);
+ pr_reg->isid_present_at_reg = 1;
+ }
+
+ return pr_reg;
+}
+
+static int core_scsi3_lunacl_depend_item(struct se_dev_entry *);
+static void core_scsi3_lunacl_undepend_item(struct se_dev_entry *);
+
+/*
+ * Function used for handling PR registrations for ALL_TG_PT=1 and ALL_TG_PT=0
+ * modes.
+ */
+static struct t10_pr_registration *__core_scsi3_alloc_registration(
+ struct se_device *dev,
+ struct se_node_acl *nacl,
+ struct se_dev_entry *deve,
+ unsigned char *isid,
+ u64 sa_res_key,
+ int all_tg_pt,
+ int aptpl)
+{
+ struct se_dev_entry *deve_tmp;
+ struct se_node_acl *nacl_tmp;
+ struct se_port *port, *port_tmp;
+ struct target_core_fabric_ops *tfo = nacl->se_tpg->se_tpg_tfo;
+ struct t10_pr_registration *pr_reg, *pr_reg_atp, *pr_reg_tmp, *pr_reg_tmp_safe;
+ int ret;
+ /*
+ * Create a registration for the I_T Nexus upon which the
+ * PROUT REGISTER was received.
+ */
+ pr_reg = __core_scsi3_do_alloc_registration(dev, nacl, deve, isid,
+ sa_res_key, all_tg_pt, aptpl);
+ if (!(pr_reg))
+ return NULL;
+ /*
+ * Return pointer to pr_reg for ALL_TG_PT=0
+ */
+ if (!(all_tg_pt))
+ return pr_reg;
+ /*
+ * Create list of matching SCSI Initiator Port registrations
+ * for ALL_TG_PT=1
+ */
+ spin_lock(&dev->se_port_lock);
+ list_for_each_entry_safe(port, port_tmp, &dev->dev_sep_list, sep_list) {
+ atomic_inc(&port->sep_tg_pt_ref_cnt);
+ smp_mb__after_atomic_inc();
+ spin_unlock(&dev->se_port_lock);
+
+ spin_lock_bh(&port->sep_alua_lock);
+ list_for_each_entry(deve_tmp, &port->sep_alua_list,
+ alua_port_list) {
+ /*
+ * This pointer will be NULL for demo mode MappedLUNs
+ * that have not been make explict via a ConfigFS
+ * MappedLUN group for the SCSI Initiator Node ACL.
+ */
+ if (!(deve_tmp->se_lun_acl))
+ continue;
+
+ nacl_tmp = deve_tmp->se_lun_acl->se_lun_nacl;
+ /*
+ * Skip the matching struct se_node_acl that is allocated
+ * above..
+ */
+ if (nacl == nacl_tmp)
+ continue;
+ /*
+ * Only perform PR registrations for target ports on
+ * the same fabric module as the REGISTER w/ ALL_TG_PT=1
+ * arrived.
+ */
+ if (tfo != nacl_tmp->se_tpg->se_tpg_tfo)
+ continue;
+ /*
+ * Look for a matching Initiator Node ACL in ASCII format
+ */
+ if (strcmp(nacl->initiatorname, nacl_tmp->initiatorname))
+ continue;
+
+ atomic_inc(&deve_tmp->pr_ref_count);
+ smp_mb__after_atomic_inc();
+ spin_unlock_bh(&port->sep_alua_lock);
+ /*
+ * Grab a configfs group dependency that is released
+ * for the exception path at label out: below, or upon
+ * completion of adding ALL_TG_PT=1 registrations in
+ * __core_scsi3_add_registration()
+ */
+ ret = core_scsi3_lunacl_depend_item(deve_tmp);
+ if (ret < 0) {
+ printk(KERN_ERR "core_scsi3_lunacl_depend"
+ "_item() failed\n");
+ atomic_dec(&port->sep_tg_pt_ref_cnt);
+ smp_mb__after_atomic_dec();
+ atomic_dec(&deve_tmp->pr_ref_count);
+ smp_mb__after_atomic_dec();
+ goto out;
+ }
+ /*
+ * Located a matching SCSI Initiator Port on a different
+ * port, allocate the pr_reg_atp and attach it to the
+ * pr_reg->pr_reg_atp_list that will be processed once
+ * the original *pr_reg is processed in
+ * __core_scsi3_add_registration()
+ */
+ pr_reg_atp = __core_scsi3_do_alloc_registration(dev,
+ nacl_tmp, deve_tmp, NULL,
+ sa_res_key, all_tg_pt, aptpl);
+ if (!(pr_reg_atp)) {
+ atomic_dec(&port->sep_tg_pt_ref_cnt);
+ smp_mb__after_atomic_dec();
+ atomic_dec(&deve_tmp->pr_ref_count);
+ smp_mb__after_atomic_dec();
+ core_scsi3_lunacl_undepend_item(deve_tmp);
+ goto out;
+ }
+
+ list_add_tail(&pr_reg_atp->pr_reg_atp_mem_list,
+ &pr_reg->pr_reg_atp_list);
+ spin_lock_bh(&port->sep_alua_lock);
+ }
+ spin_unlock_bh(&port->sep_alua_lock);
+
+ spin_lock(&dev->se_port_lock);
+ atomic_dec(&port->sep_tg_pt_ref_cnt);
+ smp_mb__after_atomic_dec();
+ }
+ spin_unlock(&dev->se_port_lock);
+
+ return pr_reg;
+out:
+ list_for_each_entry_safe(pr_reg_tmp, pr_reg_tmp_safe,
+ &pr_reg->pr_reg_atp_list, pr_reg_atp_mem_list) {
+ list_del(&pr_reg_tmp->pr_reg_atp_mem_list);
+ core_scsi3_lunacl_undepend_item(pr_reg_tmp->pr_reg_deve);
+ kmem_cache_free(t10_pr_reg_cache, pr_reg_tmp);
+ }
+ kmem_cache_free(t10_pr_reg_cache, pr_reg);
+ return NULL;
+}
+
+int core_scsi3_alloc_aptpl_registration(
+ struct t10_reservation_template *pr_tmpl,
+ u64 sa_res_key,
+ unsigned char *i_port,
+ unsigned char *isid,
+ u32 mapped_lun,
+ unsigned char *t_port,
+ u16 tpgt,
+ u32 target_lun,
+ int res_holder,
+ int all_tg_pt,
+ u8 type)
+{
+ struct t10_pr_registration *pr_reg;
+
+ if (!(i_port) || !(t_port) || !(sa_res_key)) {
+ printk(KERN_ERR "Illegal parameters for APTPL registration\n");
+ return -1;
+ }
+
+ pr_reg = kmem_cache_zalloc(t10_pr_reg_cache, GFP_KERNEL);
+ if (!(pr_reg)) {
+ printk(KERN_ERR "Unable to allocate struct t10_pr_registration\n");
+ return -1;
+ }
+ pr_reg->pr_aptpl_buf = kzalloc(pr_tmpl->pr_aptpl_buf_len, GFP_KERNEL);
+
+ INIT_LIST_HEAD(&pr_reg->pr_reg_list);
+ INIT_LIST_HEAD(&pr_reg->pr_reg_abort_list);
+ INIT_LIST_HEAD(&pr_reg->pr_reg_aptpl_list);
+ INIT_LIST_HEAD(&pr_reg->pr_reg_atp_list);
+ INIT_LIST_HEAD(&pr_reg->pr_reg_atp_mem_list);
+ atomic_set(&pr_reg->pr_res_holders, 0);
+ pr_reg->pr_reg_nacl = NULL;
+ pr_reg->pr_reg_deve = NULL;
+ pr_reg->pr_res_mapped_lun = mapped_lun;
+ pr_reg->pr_aptpl_target_lun = target_lun;
+ pr_reg->pr_res_key = sa_res_key;
+ pr_reg->pr_reg_all_tg_pt = all_tg_pt;
+ pr_reg->pr_reg_aptpl = 1;
+ pr_reg->pr_reg_tg_pt_lun = NULL;
+ pr_reg->pr_res_scope = 0; /* Always LUN_SCOPE */
+ pr_reg->pr_res_type = type;
+ /*
+ * If an ISID value had been saved in APTPL metadata for this
+ * SCSI Initiator Port, restore it now.
+ */
+ if (isid != NULL) {
+ pr_reg->pr_reg_bin_isid = get_unaligned_be64(isid);
+ snprintf(pr_reg->pr_reg_isid, PR_REG_ISID_LEN, "%s", isid);
+ pr_reg->isid_present_at_reg = 1;
+ }
+ /*
+ * Copy the i_port and t_port information from caller.
+ */
+ snprintf(pr_reg->pr_iport, PR_APTPL_MAX_IPORT_LEN, "%s", i_port);
+ snprintf(pr_reg->pr_tport, PR_APTPL_MAX_TPORT_LEN, "%s", t_port);
+ pr_reg->pr_reg_tpgt = tpgt;
+ /*
+ * Set pr_res_holder from caller, the pr_reg who is the reservation
+ * holder will get it's pointer set in core_scsi3_aptpl_reserve() once
+ * the Initiator Node LUN ACL from the fabric module is created for
+ * this registration.
+ */
+ pr_reg->pr_res_holder = res_holder;
+
+ list_add_tail(&pr_reg->pr_reg_aptpl_list, &pr_tmpl->aptpl_reg_list);
+ printk(KERN_INFO "SPC-3 PR APTPL Successfully added registration%s from"
+ " metadata\n", (res_holder) ? "+reservation" : "");
+ return 0;
+}
+
+static void core_scsi3_aptpl_reserve(
+ struct se_device *dev,
+ struct se_portal_group *tpg,
+ struct se_node_acl *node_acl,
+ struct t10_pr_registration *pr_reg)
+{
+ char i_buf[PR_REG_ISID_ID_LEN];
+ int prf_isid;
+
+ memset(i_buf, 0, PR_REG_ISID_ID_LEN);
+ prf_isid = core_pr_dump_initiator_port(pr_reg, &i_buf[0],
+ PR_REG_ISID_ID_LEN);
+
+ spin_lock(&dev->dev_reservation_lock);
+ dev->dev_pr_res_holder = pr_reg;
+ spin_unlock(&dev->dev_reservation_lock);
+
+ printk(KERN_INFO "SPC-3 PR [%s] Service Action: APTPL RESERVE created"
+ " new reservation holder TYPE: %s ALL_TG_PT: %d\n",
+ TPG_TFO(tpg)->get_fabric_name(),
+ core_scsi3_pr_dump_type(pr_reg->pr_res_type),
+ (pr_reg->pr_reg_all_tg_pt) ? 1 : 0);
+ printk(KERN_INFO "SPC-3 PR [%s] RESERVE Node: %s%s\n",
+ TPG_TFO(tpg)->get_fabric_name(), node_acl->initiatorname,
+ (prf_isid) ? &i_buf[0] : "");
+}
+
+static void __core_scsi3_add_registration(struct se_device *, struct se_node_acl *,
+ struct t10_pr_registration *, int, int);
+
+static int __core_scsi3_check_aptpl_registration(
+ struct se_device *dev,
+ struct se_portal_group *tpg,
+ struct se_lun *lun,
+ u32 target_lun,
+ struct se_node_acl *nacl,
+ struct se_dev_entry *deve)
+{
+ struct t10_pr_registration *pr_reg, *pr_reg_tmp;
+ struct t10_reservation_template *pr_tmpl = &SU_DEV(dev)->t10_reservation;
+ unsigned char i_port[PR_APTPL_MAX_IPORT_LEN];
+ unsigned char t_port[PR_APTPL_MAX_TPORT_LEN];
+ u16 tpgt;
+
+ memset(i_port, 0, PR_APTPL_MAX_IPORT_LEN);
+ memset(t_port, 0, PR_APTPL_MAX_TPORT_LEN);
+ /*
+ * Copy Initiator Port information from struct se_node_acl
+ */
+ snprintf(i_port, PR_APTPL_MAX_IPORT_LEN, "%s", nacl->initiatorname);
+ snprintf(t_port, PR_APTPL_MAX_TPORT_LEN, "%s",
+ TPG_TFO(tpg)->tpg_get_wwn(tpg));
+ tpgt = TPG_TFO(tpg)->tpg_get_tag(tpg);
+ /*
+ * Look for the matching registrations+reservation from those
+ * created from APTPL metadata. Note that multiple registrations
+ * may exist for fabrics that use ISIDs in their SCSI Initiator Port
+ * TransportIDs.
+ */
+ spin_lock(&pr_tmpl->aptpl_reg_lock);
+ list_for_each_entry_safe(pr_reg, pr_reg_tmp, &pr_tmpl->aptpl_reg_list,
+ pr_reg_aptpl_list) {
+ if (!(strcmp(pr_reg->pr_iport, i_port)) &&
+ (pr_reg->pr_res_mapped_lun == deve->mapped_lun) &&
+ !(strcmp(pr_reg->pr_tport, t_port)) &&
+ (pr_reg->pr_reg_tpgt == tpgt) &&
+ (pr_reg->pr_aptpl_target_lun == target_lun)) {
+
+ pr_reg->pr_reg_nacl = nacl;
+ pr_reg->pr_reg_deve = deve;
+ pr_reg->pr_reg_tg_pt_lun = lun;
+
+ list_del(&pr_reg->pr_reg_aptpl_list);
+ spin_unlock(&pr_tmpl->aptpl_reg_lock);
+ /*
+ * At this point all of the pointers in *pr_reg will
+ * be setup, so go ahead and add the registration.
+ */
+
+ __core_scsi3_add_registration(dev, nacl, pr_reg, 0, 0);
+ /*
+ * If this registration is the reservation holder,
+ * make that happen now..
+ */
+ if (pr_reg->pr_res_holder)
+ core_scsi3_aptpl_reserve(dev, tpg,
+ nacl, pr_reg);
+ /*
+ * Reenable pr_aptpl_active to accept new metadata
+ * updates once the SCSI device is active again..
+ */
+ spin_lock(&pr_tmpl->aptpl_reg_lock);
+ pr_tmpl->pr_aptpl_active = 1;
+ }
+ }
+ spin_unlock(&pr_tmpl->aptpl_reg_lock);
+
+ return 0;
+}
+
+int core_scsi3_check_aptpl_registration(
+ struct se_device *dev,
+ struct se_portal_group *tpg,
+ struct se_lun *lun,
+ struct se_lun_acl *lun_acl)
+{
+ struct se_subsystem_dev *su_dev = SU_DEV(dev);
+ struct se_node_acl *nacl = lun_acl->se_lun_nacl;
+ struct se_dev_entry *deve = &nacl->device_list[lun_acl->mapped_lun];
+
+ if (T10_RES(su_dev)->res_type != SPC3_PERSISTENT_RESERVATIONS)
+ return 0;
+
+ return __core_scsi3_check_aptpl_registration(dev, tpg, lun,
+ lun->unpacked_lun, nacl, deve);
+}
+
+static void __core_scsi3_dump_registration(
+ struct target_core_fabric_ops *tfo,
+ struct se_device *dev,
+ struct se_node_acl *nacl,
+ struct t10_pr_registration *pr_reg,
+ int register_type)
+{
+ struct se_portal_group *se_tpg = nacl->se_tpg;
+ char i_buf[PR_REG_ISID_ID_LEN];
+ int prf_isid;
+
+ memset(&i_buf[0], 0, PR_REG_ISID_ID_LEN);
+ prf_isid = core_pr_dump_initiator_port(pr_reg, &i_buf[0],
+ PR_REG_ISID_ID_LEN);
+
+ printk(KERN_INFO "SPC-3 PR [%s] Service Action: REGISTER%s Initiator"
+ " Node: %s%s\n", tfo->get_fabric_name(), (register_type == 2) ?
+ "_AND_MOVE" : (register_type == 1) ?
+ "_AND_IGNORE_EXISTING_KEY" : "", nacl->initiatorname,
+ (prf_isid) ? i_buf : "");
+ printk(KERN_INFO "SPC-3 PR [%s] registration on Target Port: %s,0x%04x\n",
+ tfo->get_fabric_name(), tfo->tpg_get_wwn(se_tpg),
+ tfo->tpg_get_tag(se_tpg));
+ printk(KERN_INFO "SPC-3 PR [%s] for %s TCM Subsystem %s Object Target"
+ " Port(s)\n", tfo->get_fabric_name(),
+ (pr_reg->pr_reg_all_tg_pt) ? "ALL" : "SINGLE",
+ TRANSPORT(dev)->name);
+ printk(KERN_INFO "SPC-3 PR [%s] SA Res Key: 0x%016Lx PRgeneration:"
+ " 0x%08x APTPL: %d\n", tfo->get_fabric_name(),
+ pr_reg->pr_res_key, pr_reg->pr_res_generation,
+ pr_reg->pr_reg_aptpl);
+}
+
+/*
+ * this function can be called with struct se_device->dev_reservation_lock
+ * when register_move = 1
+ */
+static void __core_scsi3_add_registration(
+ struct se_device *dev,
+ struct se_node_acl *nacl,
+ struct t10_pr_registration *pr_reg,
+ int register_type,
+ int register_move)
+{
+ struct se_subsystem_dev *su_dev = SU_DEV(dev);
+ struct target_core_fabric_ops *tfo = nacl->se_tpg->se_tpg_tfo;
+ struct t10_pr_registration *pr_reg_tmp, *pr_reg_tmp_safe;
+ struct t10_reservation_template *pr_tmpl = &SU_DEV(dev)->t10_reservation;
+
+ /*
+ * Increment PRgeneration counter for struct se_device upon a successful
+ * REGISTER, see spc4r17 section 6.3.2 READ_KEYS service action
+ *
+ * Also, when register_move = 1 for PROUT REGISTER_AND_MOVE service
+ * action, the struct se_device->dev_reservation_lock will already be held,
+ * so we do not call core_scsi3_pr_generation() which grabs the lock
+ * for the REGISTER.
+ */
+ pr_reg->pr_res_generation = (register_move) ?
+ T10_RES(su_dev)->pr_generation++ :
+ core_scsi3_pr_generation(dev);
+
+ spin_lock(&pr_tmpl->registration_lock);
+ list_add_tail(&pr_reg->pr_reg_list, &pr_tmpl->registration_list);
+ pr_reg->pr_reg_deve->def_pr_registered = 1;
+
+ __core_scsi3_dump_registration(tfo, dev, nacl, pr_reg, register_type);
+ spin_unlock(&pr_tmpl->registration_lock);
+ /*
+ * Skip extra processing for ALL_TG_PT=0 or REGISTER_AND_MOVE.
+ */
+ if (!(pr_reg->pr_reg_all_tg_pt) || (register_move))
+ return;
+ /*
+ * Walk pr_reg->pr_reg_atp_list and add registrations for ALL_TG_PT=1
+ * allocated in __core_scsi3_alloc_registration()
+ */
+ list_for_each_entry_safe(pr_reg_tmp, pr_reg_tmp_safe,
+ &pr_reg->pr_reg_atp_list, pr_reg_atp_mem_list) {
+ list_del(&pr_reg_tmp->pr_reg_atp_mem_list);
+
+ pr_reg_tmp->pr_res_generation = core_scsi3_pr_generation(dev);
+
+ spin_lock(&pr_tmpl->registration_lock);
+ list_add_tail(&pr_reg_tmp->pr_reg_list,
+ &pr_tmpl->registration_list);
+ pr_reg_tmp->pr_reg_deve->def_pr_registered = 1;
+
+ __core_scsi3_dump_registration(tfo, dev,
+ pr_reg_tmp->pr_reg_nacl, pr_reg_tmp,
+ register_type);
+ spin_unlock(&pr_tmpl->registration_lock);
+ /*
+ * Drop configfs group dependency reference from
+ * __core_scsi3_alloc_registration()
+ */
+ core_scsi3_lunacl_undepend_item(pr_reg_tmp->pr_reg_deve);
+ }
+}
+
+static int core_scsi3_alloc_registration(
+ struct se_device *dev,
+ struct se_node_acl *nacl,
+ struct se_dev_entry *deve,
+ unsigned char *isid,
+ u64 sa_res_key,
+ int all_tg_pt,
+ int aptpl,
+ int register_type,
+ int register_move)
+{
+ struct t10_pr_registration *pr_reg;
+
+ pr_reg = __core_scsi3_alloc_registration(dev, nacl, deve, isid,
+ sa_res_key, all_tg_pt, aptpl);
+ if (!(pr_reg))
+ return -1;
+
+ __core_scsi3_add_registration(dev, nacl, pr_reg,
+ register_type, register_move);
+ return 0;
+}
+
+static struct t10_pr_registration *__core_scsi3_locate_pr_reg(
+ struct se_device *dev,
+ struct se_node_acl *nacl,
+ unsigned char *isid)
+{
+ struct t10_reservation_template *pr_tmpl = &SU_DEV(dev)->t10_reservation;
+ struct t10_pr_registration *pr_reg, *pr_reg_tmp;
+ struct se_portal_group *tpg;
+
+ spin_lock(&pr_tmpl->registration_lock);
+ list_for_each_entry_safe(pr_reg, pr_reg_tmp,
+ &pr_tmpl->registration_list, pr_reg_list) {
+ /*
+ * First look for a matching struct se_node_acl
+ */
+ if (pr_reg->pr_reg_nacl != nacl)
+ continue;
+
+ tpg = pr_reg->pr_reg_nacl->se_tpg;
+ /*
+ * If this registration does NOT contain a fabric provided
+ * ISID, then we have found a match.
+ */
+ if (!(pr_reg->isid_present_at_reg)) {
+ /*
+ * Determine if this SCSI device server requires that
+ * SCSI Intiatior TransportID w/ ISIDs is enforced
+ * for fabric modules (iSCSI) requiring them.
+ */
+ if (TPG_TFO(tpg)->sess_get_initiator_sid != NULL) {
+ if (DEV_ATTRIB(dev)->enforce_pr_isids)
+ continue;
+ }
+ atomic_inc(&pr_reg->pr_res_holders);
+ smp_mb__after_atomic_inc();
+ spin_unlock(&pr_tmpl->registration_lock);
+ return pr_reg;
+ }
+ /*
+ * If the *pr_reg contains a fabric defined ISID for multi-value
+ * SCSI Initiator Port TransportIDs, then we expect a valid
+ * matching ISID to be provided by the local SCSI Initiator Port.
+ */
+ if (!(isid))
+ continue;
+ if (strcmp(isid, pr_reg->pr_reg_isid))
+ continue;
+
+ atomic_inc(&pr_reg->pr_res_holders);
+ smp_mb__after_atomic_inc();
+ spin_unlock(&pr_tmpl->registration_lock);
+ return pr_reg;
+ }
+ spin_unlock(&pr_tmpl->registration_lock);
+
+ return NULL;
+}
+
+static struct t10_pr_registration *core_scsi3_locate_pr_reg(
+ struct se_device *dev,
+ struct se_node_acl *nacl,
+ struct se_session *sess)
+{
+ struct se_portal_group *tpg = nacl->se_tpg;
+ unsigned char buf[PR_REG_ISID_LEN], *isid_ptr = NULL;
+
+ if (TPG_TFO(tpg)->sess_get_initiator_sid != NULL) {
+ memset(&buf[0], 0, PR_REG_ISID_LEN);
+ TPG_TFO(tpg)->sess_get_initiator_sid(sess, &buf[0],
+ PR_REG_ISID_LEN);
+ isid_ptr = &buf[0];
+ }
+
+ return __core_scsi3_locate_pr_reg(dev, nacl, isid_ptr);
+}
+
+static void core_scsi3_put_pr_reg(struct t10_pr_registration *pr_reg)
+{
+ atomic_dec(&pr_reg->pr_res_holders);
+ smp_mb__after_atomic_dec();
+}
+
+static int core_scsi3_check_implict_release(
+ struct se_device *dev,
+ struct t10_pr_registration *pr_reg)
+{
+ struct se_node_acl *nacl = pr_reg->pr_reg_nacl;
+ struct t10_pr_registration *pr_res_holder;
+ int ret = 0;
+
+ spin_lock(&dev->dev_reservation_lock);
+ pr_res_holder = dev->dev_pr_res_holder;
+ if (!(pr_res_holder)) {
+ spin_unlock(&dev->dev_reservation_lock);
+ return ret;
+ }
+ if (pr_res_holder == pr_reg) {
+ /*
+ * Perform an implict RELEASE if the registration that
+ * is being released is holding the reservation.
+ *
+ * From spc4r17, section 5.7.11.1:
+ *
+ * e) If the I_T nexus is the persistent reservation holder
+ * and the persistent reservation is not an all registrants
+ * type, then a PERSISTENT RESERVE OUT command with REGISTER
+ * service action or REGISTER AND IGNORE EXISTING KEY
+ * service action with the SERVICE ACTION RESERVATION KEY
+ * field set to zero (see 5.7.11.3).
+ */
+ __core_scsi3_complete_pro_release(dev, nacl, pr_reg, 0);
+ ret = 1;
+ /*
+ * For 'All Registrants' reservation types, all existing
+ * registrations are still processed as reservation holders
+ * in core_scsi3_pr_seq_non_holder() after the initial
+ * reservation holder is implictly released here.
+ */
+ } else if (pr_reg->pr_reg_all_tg_pt &&
+ (!strcmp(pr_res_holder->pr_reg_nacl->initiatorname,
+ pr_reg->pr_reg_nacl->initiatorname)) &&
+ (pr_res_holder->pr_res_key == pr_reg->pr_res_key)) {
+ printk(KERN_ERR "SPC-3 PR: Unable to perform ALL_TG_PT=1"
+ " UNREGISTER while existing reservation with matching"
+ " key 0x%016Lx is present from another SCSI Initiator"
+ " Port\n", pr_reg->pr_res_key);
+ ret = -1;
+ }
+ spin_unlock(&dev->dev_reservation_lock);
+
+ return ret;
+}
+
+/*
+ * Called with struct t10_reservation_template->registration_lock held.
+ */
+static void __core_scsi3_free_registration(
+ struct se_device *dev,
+ struct t10_pr_registration *pr_reg,
+ struct list_head *preempt_and_abort_list,
+ int dec_holders)
+{
+ struct target_core_fabric_ops *tfo =
+ pr_reg->pr_reg_nacl->se_tpg->se_tpg_tfo;
+ struct t10_reservation_template *pr_tmpl = &SU_DEV(dev)->t10_reservation;
+ char i_buf[PR_REG_ISID_ID_LEN];
+ int prf_isid;
+
+ memset(i_buf, 0, PR_REG_ISID_ID_LEN);
+ prf_isid = core_pr_dump_initiator_port(pr_reg, &i_buf[0],
+ PR_REG_ISID_ID_LEN);
+
+ pr_reg->pr_reg_deve->def_pr_registered = 0;
+ pr_reg->pr_reg_deve->pr_res_key = 0;
+ list_del(&pr_reg->pr_reg_list);
+ /*
+ * Caller accessing *pr_reg using core_scsi3_locate_pr_reg(),
+ * so call core_scsi3_put_pr_reg() to decrement our reference.
+ */
+ if (dec_holders)
+ core_scsi3_put_pr_reg(pr_reg);
+ /*
+ * Wait until all reference from any other I_T nexuses for this
+ * *pr_reg have been released. Because list_del() is called above,
+ * the last core_scsi3_put_pr_reg(pr_reg) will release this reference
+ * count back to zero, and we release *pr_reg.
+ */
+ while (atomic_read(&pr_reg->pr_res_holders) != 0) {
+ spin_unlock(&pr_tmpl->registration_lock);
+ printk("SPC-3 PR [%s] waiting for pr_res_holders\n",
+ tfo->get_fabric_name());
+ cpu_relax();
+ spin_lock(&pr_tmpl->registration_lock);
+ }
+
+ printk(KERN_INFO "SPC-3 PR [%s] Service Action: UNREGISTER Initiator"
+ " Node: %s%s\n", tfo->get_fabric_name(),
+ pr_reg->pr_reg_nacl->initiatorname,
+ (prf_isid) ? &i_buf[0] : "");
+ printk(KERN_INFO "SPC-3 PR [%s] for %s TCM Subsystem %s Object Target"
+ " Port(s)\n", tfo->get_fabric_name(),
+ (pr_reg->pr_reg_all_tg_pt) ? "ALL" : "SINGLE",
+ TRANSPORT(dev)->name);
+ printk(KERN_INFO "SPC-3 PR [%s] SA Res Key: 0x%016Lx PRgeneration:"
+ " 0x%08x\n", tfo->get_fabric_name(), pr_reg->pr_res_key,
+ pr_reg->pr_res_generation);
+
+ if (!(preempt_and_abort_list)) {
+ pr_reg->pr_reg_deve = NULL;
+ pr_reg->pr_reg_nacl = NULL;
+ kfree(pr_reg->pr_aptpl_buf);
+ kmem_cache_free(t10_pr_reg_cache, pr_reg);
+ return;
+ }
+ /*
+ * For PREEMPT_AND_ABORT, the list of *pr_reg in preempt_and_abort_list
+ * are released once the ABORT_TASK_SET has completed..
+ */
+ list_add_tail(&pr_reg->pr_reg_abort_list, preempt_and_abort_list);
+}
+
+void core_scsi3_free_pr_reg_from_nacl(
+ struct se_device *dev,
+ struct se_node_acl *nacl)
+{
+ struct t10_reservation_template *pr_tmpl = &SU_DEV(dev)->t10_reservation;
+ struct t10_pr_registration *pr_reg, *pr_reg_tmp, *pr_res_holder;
+ /*
+ * If the passed se_node_acl matches the reservation holder,
+ * release the reservation.
+ */
+ spin_lock(&dev->dev_reservation_lock);
+ pr_res_holder = dev->dev_pr_res_holder;
+ if ((pr_res_holder != NULL) &&
+ (pr_res_holder->pr_reg_nacl == nacl))
+ __core_scsi3_complete_pro_release(dev, nacl, pr_res_holder, 0);
+ spin_unlock(&dev->dev_reservation_lock);
+ /*
+ * Release any registration associated with the struct se_node_acl.
+ */
+ spin_lock(&pr_tmpl->registration_lock);
+ list_for_each_entry_safe(pr_reg, pr_reg_tmp,
+ &pr_tmpl->registration_list, pr_reg_list) {
+
+ if (pr_reg->pr_reg_nacl != nacl)
+ continue;
+
+ __core_scsi3_free_registration(dev, pr_reg, NULL, 0);
+ }
+ spin_unlock(&pr_tmpl->registration_lock);
+}
+
+void core_scsi3_free_all_registrations(
+ struct se_device *dev)
+{
+ struct t10_reservation_template *pr_tmpl = &SU_DEV(dev)->t10_reservation;
+ struct t10_pr_registration *pr_reg, *pr_reg_tmp, *pr_res_holder;
+
+ spin_lock(&dev->dev_reservation_lock);
+ pr_res_holder = dev->dev_pr_res_holder;
+ if (pr_res_holder != NULL) {
+ struct se_node_acl *pr_res_nacl = pr_res_holder->pr_reg_nacl;
+ __core_scsi3_complete_pro_release(dev, pr_res_nacl,
+ pr_res_holder, 0);
+ }
+ spin_unlock(&dev->dev_reservation_lock);
+
+ spin_lock(&pr_tmpl->registration_lock);
+ list_for_each_entry_safe(pr_reg, pr_reg_tmp,
+ &pr_tmpl->registration_list, pr_reg_list) {
+
+ __core_scsi3_free_registration(dev, pr_reg, NULL, 0);
+ }
+ spin_unlock(&pr_tmpl->registration_lock);
+
+ spin_lock(&pr_tmpl->aptpl_reg_lock);
+ list_for_each_entry_safe(pr_reg, pr_reg_tmp, &pr_tmpl->aptpl_reg_list,
+ pr_reg_aptpl_list) {
+ list_del(&pr_reg->pr_reg_aptpl_list);
+ kfree(pr_reg->pr_aptpl_buf);
+ kmem_cache_free(t10_pr_reg_cache, pr_reg);
+ }
+ spin_unlock(&pr_tmpl->aptpl_reg_lock);
+}
+
+static int core_scsi3_tpg_depend_item(struct se_portal_group *tpg)
+{
+ return configfs_depend_item(TPG_TFO(tpg)->tf_subsys,
+ &tpg->tpg_group.cg_item);
+}
+
+static void core_scsi3_tpg_undepend_item(struct se_portal_group *tpg)
+{
+ configfs_undepend_item(TPG_TFO(tpg)->tf_subsys,
+ &tpg->tpg_group.cg_item);
+
+ atomic_dec(&tpg->tpg_pr_ref_count);
+ smp_mb__after_atomic_dec();
+}
+
+static int core_scsi3_nodeacl_depend_item(struct se_node_acl *nacl)
+{
+ struct se_portal_group *tpg = nacl->se_tpg;
+
+ if (nacl->dynamic_node_acl)
+ return 0;
+
+ return configfs_depend_item(TPG_TFO(tpg)->tf_subsys,
+ &nacl->acl_group.cg_item);
+}
+
+static void core_scsi3_nodeacl_undepend_item(struct se_node_acl *nacl)
+{
+ struct se_portal_group *tpg = nacl->se_tpg;
+
+ if (nacl->dynamic_node_acl) {
+ atomic_dec(&nacl->acl_pr_ref_count);
+ smp_mb__after_atomic_dec();
+ return;
+ }
+
+ configfs_undepend_item(TPG_TFO(tpg)->tf_subsys,
+ &nacl->acl_group.cg_item);
+
+ atomic_dec(&nacl->acl_pr_ref_count);
+ smp_mb__after_atomic_dec();
+}
+
+static int core_scsi3_lunacl_depend_item(struct se_dev_entry *se_deve)
+{
+ struct se_lun_acl *lun_acl = se_deve->se_lun_acl;
+ struct se_node_acl *nacl;
+ struct se_portal_group *tpg;
+ /*
+ * For nacl->dynamic_node_acl=1
+ */
+ if (!(lun_acl))
+ return 0;
+
+ nacl = lun_acl->se_lun_nacl;
+ tpg = nacl->se_tpg;
+
+ return configfs_depend_item(TPG_TFO(tpg)->tf_subsys,
+ &lun_acl->se_lun_group.cg_item);
+}
+
+static void core_scsi3_lunacl_undepend_item(struct se_dev_entry *se_deve)
+{
+ struct se_lun_acl *lun_acl = se_deve->se_lun_acl;
+ struct se_node_acl *nacl;
+ struct se_portal_group *tpg;
+ /*
+ * For nacl->dynamic_node_acl=1
+ */
+ if (!(lun_acl)) {
+ atomic_dec(&se_deve->pr_ref_count);
+ smp_mb__after_atomic_dec();
+ return;
+ }
+ nacl = lun_acl->se_lun_nacl;
+ tpg = nacl->se_tpg;
+
+ configfs_undepend_item(TPG_TFO(tpg)->tf_subsys,
+ &lun_acl->se_lun_group.cg_item);
+
+ atomic_dec(&se_deve->pr_ref_count);
+ smp_mb__after_atomic_dec();
+}
+
+static int core_scsi3_decode_spec_i_port(
+ struct se_cmd *cmd,
+ struct se_portal_group *tpg,
+ unsigned char *l_isid,
+ u64 sa_res_key,
+ int all_tg_pt,
+ int aptpl)
+{
+ struct se_device *dev = SE_DEV(cmd);
+ struct se_port *tmp_port;
+ struct se_portal_group *dest_tpg = NULL, *tmp_tpg;
+ struct se_session *se_sess = SE_SESS(cmd);
+ struct se_node_acl *dest_node_acl = NULL;
+ struct se_dev_entry *dest_se_deve = NULL, *local_se_deve;
+ struct t10_pr_registration *dest_pr_reg, *local_pr_reg, *pr_reg_e;
+ struct t10_pr_registration *pr_reg_tmp, *pr_reg_tmp_safe;
+ struct list_head tid_dest_list;
+ struct pr_transport_id_holder *tidh_new, *tidh, *tidh_tmp;
+ struct target_core_fabric_ops *tmp_tf_ops;
+ unsigned char *buf = (unsigned char *)T_TASK(cmd)->t_task_buf;
+ unsigned char *ptr, *i_str = NULL, proto_ident, tmp_proto_ident;
+ char *iport_ptr = NULL, dest_iport[64], i_buf[PR_REG_ISID_ID_LEN];
+ u32 tpdl, tid_len = 0;
+ int ret, dest_local_nexus, prf_isid;
+ u32 dest_rtpi = 0;
+
+ memset(dest_iport, 0, 64);
+ INIT_LIST_HEAD(&tid_dest_list);
+
+ local_se_deve = &se_sess->se_node_acl->device_list[cmd->orig_fe_lun];
+ /*
+ * Allocate a struct pr_transport_id_holder and setup the
+ * local_node_acl and local_se_deve pointers and add to
+ * struct list_head tid_dest_list for add registration
+ * processing in the loop of tid_dest_list below.
+ */
+ tidh_new = kzalloc(sizeof(struct pr_transport_id_holder), GFP_KERNEL);
+ if (!(tidh_new)) {
+ printk(KERN_ERR "Unable to allocate tidh_new\n");
+ return PYX_TRANSPORT_LU_COMM_FAILURE;
+ }
+ INIT_LIST_HEAD(&tidh_new->dest_list);
+ tidh_new->dest_tpg = tpg;
+ tidh_new->dest_node_acl = se_sess->se_node_acl;
+ tidh_new->dest_se_deve = local_se_deve;
+
+ local_pr_reg = __core_scsi3_alloc_registration(SE_DEV(cmd),
+ se_sess->se_node_acl, local_se_deve, l_isid,
+ sa_res_key, all_tg_pt, aptpl);
+ if (!(local_pr_reg)) {
+ kfree(tidh_new);
+ return PYX_TRANSPORT_LU_COMM_FAILURE;
+ }
+ tidh_new->dest_pr_reg = local_pr_reg;
+ /*
+ * The local I_T nexus does not hold any configfs dependances,
+ * so we set tid_h->dest_local_nexus=1 to prevent the
+ * configfs_undepend_item() calls in the tid_dest_list loops below.
+ */
+ tidh_new->dest_local_nexus = 1;
+ list_add_tail(&tidh_new->dest_list, &tid_dest_list);
+ /*
+ * For a PERSISTENT RESERVE OUT specify initiator ports payload,
+ * first extract TransportID Parameter Data Length, and make sure
+ * the value matches up to the SCSI expected data transfer length.
+ */
+ tpdl = (buf[24] & 0xff) << 24;
+ tpdl |= (buf[25] & 0xff) << 16;
+ tpdl |= (buf[26] & 0xff) << 8;
+ tpdl |= buf[27] & 0xff;
+
+ if ((tpdl + 28) != cmd->data_length) {
+ printk(KERN_ERR "SPC-3 PR: Illegal tpdl: %u + 28 byte header"
+ " does not equal CDB data_length: %u\n", tpdl,
+ cmd->data_length);
+ ret = PYX_TRANSPORT_INVALID_PARAMETER_LIST;
+ goto out;
+ }
+ /*
+ * Start processing the received transport IDs using the
+ * receiving I_T Nexus portal's fabric dependent methods to
+ * obtain the SCSI Initiator Port/Device Identifiers.
+ */
+ ptr = &buf[28];
+
+ while (tpdl > 0) {
+ proto_ident = (ptr[0] & 0x0f);
+ dest_tpg = NULL;
+
+ spin_lock(&dev->se_port_lock);
+ list_for_each_entry(tmp_port, &dev->dev_sep_list, sep_list) {
+ tmp_tpg = tmp_port->sep_tpg;
+ if (!(tmp_tpg))
+ continue;
+ tmp_tf_ops = TPG_TFO(tmp_tpg);
+ if (!(tmp_tf_ops))
+ continue;
+ if (!(tmp_tf_ops->get_fabric_proto_ident) ||
+ !(tmp_tf_ops->tpg_parse_pr_out_transport_id))
+ continue;
+ /*
+ * Look for the matching proto_ident provided by
+ * the received TransportID
+ */
+ tmp_proto_ident = tmp_tf_ops->get_fabric_proto_ident(tmp_tpg);
+ if (tmp_proto_ident != proto_ident)
+ continue;
+ dest_rtpi = tmp_port->sep_rtpi;
+
+ i_str = tmp_tf_ops->tpg_parse_pr_out_transport_id(
+ tmp_tpg, (const char *)ptr, &tid_len,
+ &iport_ptr);
+ if (!(i_str))
+ continue;
+
+ atomic_inc(&tmp_tpg->tpg_pr_ref_count);
+ smp_mb__after_atomic_inc();
+ spin_unlock(&dev->se_port_lock);
+
+ ret = core_scsi3_tpg_depend_item(tmp_tpg);
+ if (ret != 0) {
+ printk(KERN_ERR " core_scsi3_tpg_depend_item()"
+ " for tmp_tpg\n");
+ atomic_dec(&tmp_tpg->tpg_pr_ref_count);
+ smp_mb__after_atomic_dec();
+ ret = PYX_TRANSPORT_LU_COMM_FAILURE;
+ goto out;
+ }
+ /*
+ * Locate the desination initiator ACL to be registered
+ * from the decoded fabric module specific TransportID
+ * at *i_str.
+ */
+ spin_lock_bh(&tmp_tpg->acl_node_lock);
+ dest_node_acl = __core_tpg_get_initiator_node_acl(
+ tmp_tpg, i_str);
+ if (dest_node_acl) {
+ atomic_inc(&dest_node_acl->acl_pr_ref_count);
+ smp_mb__after_atomic_inc();
+ }
+ spin_unlock_bh(&tmp_tpg->acl_node_lock);
+
+ if (!(dest_node_acl)) {
+ core_scsi3_tpg_undepend_item(tmp_tpg);
+ spin_lock(&dev->se_port_lock);
+ continue;
+ }
+
+ ret = core_scsi3_nodeacl_depend_item(dest_node_acl);
+ if (ret != 0) {
+ printk(KERN_ERR "configfs_depend_item() failed"
+ " for dest_node_acl->acl_group\n");
+ atomic_dec(&dest_node_acl->acl_pr_ref_count);
+ smp_mb__after_atomic_dec();
+ core_scsi3_tpg_undepend_item(tmp_tpg);
+ ret = PYX_TRANSPORT_LU_COMM_FAILURE;
+ goto out;
+ }
+
+ dest_tpg = tmp_tpg;
+ printk(KERN_INFO "SPC-3 PR SPEC_I_PT: Located %s Node:"
+ " %s Port RTPI: %hu\n",
+ TPG_TFO(dest_tpg)->get_fabric_name(),
+ dest_node_acl->initiatorname, dest_rtpi);
+
+ spin_lock(&dev->se_port_lock);
+ break;
+ }
+ spin_unlock(&dev->se_port_lock);
+
+ if (!(dest_tpg)) {
+ printk(KERN_ERR "SPC-3 PR SPEC_I_PT: Unable to locate"
+ " dest_tpg\n");
+ ret = PYX_TRANSPORT_INVALID_PARAMETER_LIST;
+ goto out;
+ }
+#if 0
+ printk("SPC-3 PR SPEC_I_PT: Got %s data_length: %u tpdl: %u"
+ " tid_len: %d for %s + %s\n",
+ TPG_TFO(dest_tpg)->get_fabric_name(), cmd->data_length,
+ tpdl, tid_len, i_str, iport_ptr);
+#endif
+ if (tid_len > tpdl) {
+ printk(KERN_ERR "SPC-3 PR SPEC_I_PT: Illegal tid_len:"
+ " %u for Transport ID: %s\n", tid_len, ptr);
+ core_scsi3_nodeacl_undepend_item(dest_node_acl);
+ core_scsi3_tpg_undepend_item(dest_tpg);
+ ret = PYX_TRANSPORT_INVALID_PARAMETER_LIST;
+ goto out;
+ }
+ /*
+ * Locate the desintation struct se_dev_entry pointer for matching
+ * RELATIVE TARGET PORT IDENTIFIER on the receiving I_T Nexus
+ * Target Port.
+ */
+ dest_se_deve = core_get_se_deve_from_rtpi(dest_node_acl,
+ dest_rtpi);
+ if (!(dest_se_deve)) {
+ printk(KERN_ERR "Unable to locate %s dest_se_deve"
+ " from destination RTPI: %hu\n",
+ TPG_TFO(dest_tpg)->get_fabric_name(),
+ dest_rtpi);
+
+ core_scsi3_nodeacl_undepend_item(dest_node_acl);
+ core_scsi3_tpg_undepend_item(dest_tpg);
+ ret = PYX_TRANSPORT_INVALID_PARAMETER_LIST;
+ goto out;
+ }
+
+ ret = core_scsi3_lunacl_depend_item(dest_se_deve);
+ if (ret < 0) {
+ printk(KERN_ERR "core_scsi3_lunacl_depend_item()"
+ " failed\n");
+ atomic_dec(&dest_se_deve->pr_ref_count);
+ smp_mb__after_atomic_dec();
+ core_scsi3_nodeacl_undepend_item(dest_node_acl);
+ core_scsi3_tpg_undepend_item(dest_tpg);
+ ret = PYX_TRANSPORT_LU_COMM_FAILURE;
+ goto out;
+ }
+#if 0
+ printk(KERN_INFO "SPC-3 PR SPEC_I_PT: Located %s Node: %s"
+ " dest_se_deve mapped_lun: %u\n",
+ TPG_TFO(dest_tpg)->get_fabric_name(),
+ dest_node_acl->initiatorname, dest_se_deve->mapped_lun);
+#endif
+ /*
+ * Skip any TransportIDs that already have a registration for
+ * this target port.
+ */
+ pr_reg_e = __core_scsi3_locate_pr_reg(dev, dest_node_acl,
+ iport_ptr);
+ if (pr_reg_e) {
+ core_scsi3_put_pr_reg(pr_reg_e);
+ core_scsi3_lunacl_undepend_item(dest_se_deve);
+ core_scsi3_nodeacl_undepend_item(dest_node_acl);
+ core_scsi3_tpg_undepend_item(dest_tpg);
+ ptr += tid_len;
+ tpdl -= tid_len;
+ tid_len = 0;
+ continue;
+ }
+ /*
+ * Allocate a struct pr_transport_id_holder and setup
+ * the dest_node_acl and dest_se_deve pointers for the
+ * loop below.
+ */
+ tidh_new = kzalloc(sizeof(struct pr_transport_id_holder),
+ GFP_KERNEL);
+ if (!(tidh_new)) {
+ printk(KERN_ERR "Unable to allocate tidh_new\n");
+ core_scsi3_lunacl_undepend_item(dest_se_deve);
+ core_scsi3_nodeacl_undepend_item(dest_node_acl);
+ core_scsi3_tpg_undepend_item(dest_tpg);
+ ret = PYX_TRANSPORT_LU_COMM_FAILURE;
+ goto out;
+ }
+ INIT_LIST_HEAD(&tidh_new->dest_list);
+ tidh_new->dest_tpg = dest_tpg;
+ tidh_new->dest_node_acl = dest_node_acl;
+ tidh_new->dest_se_deve = dest_se_deve;
+
+ /*
+ * Allocate, but do NOT add the registration for the
+ * TransportID referenced SCSI Initiator port. This
+ * done because of the following from spc4r17 in section
+ * 6.14.3 wrt SPEC_I_PT:
+ *
+ * "If a registration fails for any initiator port (e.g., if th
+ * logical unit does not have enough resources available to
+ * hold the registration information), no registrations shall be
+ * made, and the command shall be terminated with
+ * CHECK CONDITION status."
+ *
+ * That means we call __core_scsi3_alloc_registration() here,
+ * and then call __core_scsi3_add_registration() in the
+ * 2nd loop which will never fail.
+ */
+ dest_pr_reg = __core_scsi3_alloc_registration(SE_DEV(cmd),
+ dest_node_acl, dest_se_deve, iport_ptr,
+ sa_res_key, all_tg_pt, aptpl);
+ if (!(dest_pr_reg)) {
+ core_scsi3_lunacl_undepend_item(dest_se_deve);
+ core_scsi3_nodeacl_undepend_item(dest_node_acl);
+ core_scsi3_tpg_undepend_item(dest_tpg);
+ kfree(tidh_new);
+ ret = PYX_TRANSPORT_INVALID_PARAMETER_LIST;
+ goto out;
+ }
+ tidh_new->dest_pr_reg = dest_pr_reg;
+ list_add_tail(&tidh_new->dest_list, &tid_dest_list);
+
+ ptr += tid_len;
+ tpdl -= tid_len;
+ tid_len = 0;
+
+ }
+ /*
+ * Go ahead and create a registrations from tid_dest_list for the
+ * SPEC_I_PT provided TransportID for the *tidh referenced dest_node_acl
+ * and dest_se_deve.
+ *
+ * The SA Reservation Key from the PROUT is set for the
+ * registration, and ALL_TG_PT is also passed. ALL_TG_PT=1
+ * means that the TransportID Initiator port will be
+ * registered on all of the target ports in the SCSI target device
+ * ALL_TG_PT=0 means the registration will only be for the
+ * SCSI target port the PROUT REGISTER with SPEC_I_PT=1
+ * was received.
+ */
+ list_for_each_entry_safe(tidh, tidh_tmp, &tid_dest_list, dest_list) {
+ dest_tpg = tidh->dest_tpg;
+ dest_node_acl = tidh->dest_node_acl;
+ dest_se_deve = tidh->dest_se_deve;
+ dest_pr_reg = tidh->dest_pr_reg;
+ dest_local_nexus = tidh->dest_local_nexus;
+
+ list_del(&tidh->dest_list);
+ kfree(tidh);
+
+ memset(i_buf, 0, PR_REG_ISID_ID_LEN);
+ prf_isid = core_pr_dump_initiator_port(dest_pr_reg, &i_buf[0],
+ PR_REG_ISID_ID_LEN);
+
+ __core_scsi3_add_registration(SE_DEV(cmd), dest_node_acl,
+ dest_pr_reg, 0, 0);
+
+ printk(KERN_INFO "SPC-3 PR [%s] SPEC_I_PT: Successfully"
+ " registered Transport ID for Node: %s%s Mapped LUN:"
+ " %u\n", TPG_TFO(dest_tpg)->get_fabric_name(),
+ dest_node_acl->initiatorname, (prf_isid) ?
+ &i_buf[0] : "", dest_se_deve->mapped_lun);
+
+ if (dest_local_nexus)
+ continue;
+
+ core_scsi3_lunacl_undepend_item(dest_se_deve);
+ core_scsi3_nodeacl_undepend_item(dest_node_acl);
+ core_scsi3_tpg_undepend_item(dest_tpg);
+ }
+
+ return 0;
+out:
+ /*
+ * For the failure case, release everything from tid_dest_list
+ * including *dest_pr_reg and the configfs dependances..
+ */
+ list_for_each_entry_safe(tidh, tidh_tmp, &tid_dest_list, dest_list) {
+ dest_tpg = tidh->dest_tpg;
+ dest_node_acl = tidh->dest_node_acl;
+ dest_se_deve = tidh->dest_se_deve;
+ dest_pr_reg = tidh->dest_pr_reg;
+ dest_local_nexus = tidh->dest_local_nexus;
+
+ list_del(&tidh->dest_list);
+ kfree(tidh);
+ /*
+ * Release any extra ALL_TG_PT=1 registrations for
+ * the SPEC_I_PT=1 case.
+ */
+ list_for_each_entry_safe(pr_reg_tmp, pr_reg_tmp_safe,
+ &dest_pr_reg->pr_reg_atp_list,
+ pr_reg_atp_mem_list) {
+ list_del(&pr_reg_tmp->pr_reg_atp_mem_list);
+ core_scsi3_lunacl_undepend_item(pr_reg_tmp->pr_reg_deve);
+ kmem_cache_free(t10_pr_reg_cache, pr_reg_tmp);
+ }
+
+ kfree(dest_pr_reg->pr_aptpl_buf);
+ kmem_cache_free(t10_pr_reg_cache, dest_pr_reg);
+
+ if (dest_local_nexus)
+ continue;
+
+ core_scsi3_lunacl_undepend_item(dest_se_deve);
+ core_scsi3_nodeacl_undepend_item(dest_node_acl);
+ core_scsi3_tpg_undepend_item(dest_tpg);
+ }
+ return ret;
+}
+
+/*
+ * Called with struct se_device->dev_reservation_lock held
+ */
+static int __core_scsi3_update_aptpl_buf(
+ struct se_device *dev,
+ unsigned char *buf,
+ u32 pr_aptpl_buf_len,
+ int clear_aptpl_metadata)
+{
+ struct se_lun *lun;
+ struct se_portal_group *tpg;
+ struct se_subsystem_dev *su_dev = SU_DEV(dev);
+ struct t10_pr_registration *pr_reg;
+ unsigned char tmp[1024], isid_buf[32];
+ ssize_t len = 0;
+ int reg_count = 0;
+
+ memset(buf, 0, pr_aptpl_buf_len);
+ /*
+ * Called to clear metadata once APTPL has been deactivated.
+ */
+ if (clear_aptpl_metadata) {
+ snprintf(buf, pr_aptpl_buf_len,
+ "No Registrations or Reservations\n");
+ return 0;
+ }
+ /*
+ * Walk the registration list..
+ */
+ spin_lock(&T10_RES(su_dev)->registration_lock);
+ list_for_each_entry(pr_reg, &T10_RES(su_dev)->registration_list,
+ pr_reg_list) {
+
+ memset(tmp, 0, 1024);
+ memset(isid_buf, 0, 32);
+ tpg = pr_reg->pr_reg_nacl->se_tpg;
+ lun = pr_reg->pr_reg_tg_pt_lun;
+ /*
+ * Write out any ISID value to APTPL metadata that was included
+ * in the original registration.
+ */
+ if (pr_reg->isid_present_at_reg)
+ snprintf(isid_buf, 32, "initiator_sid=%s\n",
+ pr_reg->pr_reg_isid);
+ /*
+ * Include special metadata if the pr_reg matches the
+ * reservation holder.
+ */
+ if (dev->dev_pr_res_holder == pr_reg) {
+ snprintf(tmp, 1024, "PR_REG_START: %d"
+ "\ninitiator_fabric=%s\n"
+ "initiator_node=%s\n%s"
+ "sa_res_key=%llu\n"
+ "res_holder=1\nres_type=%02x\n"
+ "res_scope=%02x\nres_all_tg_pt=%d\n"
+ "mapped_lun=%u\n", reg_count,
+ TPG_TFO(tpg)->get_fabric_name(),
+ pr_reg->pr_reg_nacl->initiatorname, isid_buf,
+ pr_reg->pr_res_key, pr_reg->pr_res_type,
+ pr_reg->pr_res_scope, pr_reg->pr_reg_all_tg_pt,
+ pr_reg->pr_res_mapped_lun);
+ } else {
+ snprintf(tmp, 1024, "PR_REG_START: %d\n"
+ "initiator_fabric=%s\ninitiator_node=%s\n%s"
+ "sa_res_key=%llu\nres_holder=0\n"
+ "res_all_tg_pt=%d\nmapped_lun=%u\n",
+ reg_count, TPG_TFO(tpg)->get_fabric_name(),
+ pr_reg->pr_reg_nacl->initiatorname, isid_buf,
+ pr_reg->pr_res_key, pr_reg->pr_reg_all_tg_pt,
+ pr_reg->pr_res_mapped_lun);
+ }
+
+ if ((len + strlen(tmp) > pr_aptpl_buf_len)) {
+ printk(KERN_ERR "Unable to update renaming"
+ " APTPL metadata\n");
+ spin_unlock(&T10_RES(su_dev)->registration_lock);
+ return -1;
+ }
+ len += sprintf(buf+len, "%s", tmp);
+
+ /*
+ * Include information about the associated SCSI target port.
+ */
+ snprintf(tmp, 1024, "target_fabric=%s\ntarget_node=%s\n"
+ "tpgt=%hu\nport_rtpi=%hu\ntarget_lun=%u\nPR_REG_END:"
+ " %d\n", TPG_TFO(tpg)->get_fabric_name(),
+ TPG_TFO(tpg)->tpg_get_wwn(tpg),
+ TPG_TFO(tpg)->tpg_get_tag(tpg),
+ lun->lun_sep->sep_rtpi, lun->unpacked_lun, reg_count);
+
+ if ((len + strlen(tmp) > pr_aptpl_buf_len)) {
+ printk(KERN_ERR "Unable to update renaming"
+ " APTPL metadata\n");
+ spin_unlock(&T10_RES(su_dev)->registration_lock);
+ return -1;
+ }
+ len += sprintf(buf+len, "%s", tmp);
+ reg_count++;
+ }
+ spin_unlock(&T10_RES(su_dev)->registration_lock);
+
+ if (!(reg_count))
+ len += sprintf(buf+len, "No Registrations or Reservations");
+
+ return 0;
+}
+
+static int core_scsi3_update_aptpl_buf(
+ struct se_device *dev,
+ unsigned char *buf,
+ u32 pr_aptpl_buf_len,
+ int clear_aptpl_metadata)
+{
+ int ret;
+
+ spin_lock(&dev->dev_reservation_lock);
+ ret = __core_scsi3_update_aptpl_buf(dev, buf, pr_aptpl_buf_len,
+ clear_aptpl_metadata);
+ spin_unlock(&dev->dev_reservation_lock);
+
+ return ret;
+}
+
+/*
+ * Called with struct se_device->aptpl_file_mutex held
+ */
+static int __core_scsi3_write_aptpl_to_file(
+ struct se_device *dev,
+ unsigned char *buf,
+ u32 pr_aptpl_buf_len)
+{
+ struct t10_wwn *wwn = &SU_DEV(dev)->t10_wwn;
+ struct file *file;
+ struct iovec iov[1];
+ mm_segment_t old_fs;
+ int flags = O_RDWR | O_CREAT | O_TRUNC;
+ char path[512];
+ int ret;
+
+ memset(iov, 0, sizeof(struct iovec));
+ memset(path, 0, 512);
+
+ if (strlen(&wwn->unit_serial[0]) > 512) {
+ printk(KERN_ERR "WWN value for struct se_device does not fit"
+ " into path buffer\n");
+ return -1;
+ }
+
+ snprintf(path, 512, "/var/target/pr/aptpl_%s", &wwn->unit_serial[0]);
+ file = filp_open(path, flags, 0600);
+ if (IS_ERR(file) || !file || !file->f_dentry) {
+ printk(KERN_ERR "filp_open(%s) for APTPL metadata"
+ " failed\n", path);
+ return -1;
+ }
+
+ iov[0].iov_base = &buf[0];
+ if (!(pr_aptpl_buf_len))
+ iov[0].iov_len = (strlen(&buf[0]) + 1); /* Add extra for NULL */
+ else
+ iov[0].iov_len = pr_aptpl_buf_len;
+
+ old_fs = get_fs();
+ set_fs(get_ds());
+ ret = vfs_writev(file, &iov[0], 1, &file->f_pos);
+ set_fs(old_fs);
+
+ if (ret < 0) {
+ printk("Error writing APTPL metadata file: %s\n", path);
+ filp_close(file, NULL);
+ return -1;
+ }
+ filp_close(file, NULL);
+
+ return 0;
+}
+
+static int core_scsi3_update_and_write_aptpl(
+ struct se_device *dev,
+ unsigned char *in_buf,
+ u32 in_pr_aptpl_buf_len)
+{
+ unsigned char null_buf[64], *buf;
+ u32 pr_aptpl_buf_len;
+ int ret, clear_aptpl_metadata = 0;
+ /*
+ * Can be called with a NULL pointer from PROUT service action CLEAR
+ */
+ if (!(in_buf)) {
+ memset(null_buf, 0, 64);
+ buf = &null_buf[0];
+ /*
+ * This will clear the APTPL metadata to:
+ * "No Registrations or Reservations" status
+ */
+ pr_aptpl_buf_len = 64;
+ clear_aptpl_metadata = 1;
+ } else {
+ buf = in_buf;
+ pr_aptpl_buf_len = in_pr_aptpl_buf_len;
+ }
+
+ ret = core_scsi3_update_aptpl_buf(dev, buf, pr_aptpl_buf_len,
+ clear_aptpl_metadata);
+ if (ret != 0)
+ return -1;
+ /*
+ * __core_scsi3_write_aptpl_to_file() will call strlen()
+ * on the passed buf to determine pr_aptpl_buf_len.
+ */
+ ret = __core_scsi3_write_aptpl_to_file(dev, buf, 0);
+ if (ret != 0)
+ return -1;
+
+ return ret;
+}
+
+static int core_scsi3_emulate_pro_register(
+ struct se_cmd *cmd,
+ u64 res_key,
+ u64 sa_res_key,
+ int aptpl,
+ int all_tg_pt,
+ int spec_i_pt,
+ int ignore_key)
+{
+ struct se_session *se_sess = SE_SESS(cmd);
+ struct se_device *dev = SE_DEV(cmd);
+ struct se_dev_entry *se_deve;
+ struct se_lun *se_lun = SE_LUN(cmd);
+ struct se_portal_group *se_tpg;
+ struct t10_pr_registration *pr_reg, *pr_reg_p, *pr_reg_tmp, *pr_reg_e;
+ struct t10_reservation_template *pr_tmpl = &SU_DEV(dev)->t10_reservation;
+ /* Used for APTPL metadata w/ UNREGISTER */
+ unsigned char *pr_aptpl_buf = NULL;
+ unsigned char isid_buf[PR_REG_ISID_LEN], *isid_ptr = NULL;
+ int pr_holder = 0, ret = 0, type;
+
+ if (!(se_sess) || !(se_lun)) {
+ printk(KERN_ERR "SPC-3 PR: se_sess || struct se_lun is NULL!\n");
+ return PYX_TRANSPORT_LU_COMM_FAILURE;
+ }
+ se_tpg = se_sess->se_tpg;
+ se_deve = &se_sess->se_node_acl->device_list[cmd->orig_fe_lun];
+
+ if (TPG_TFO(se_tpg)->sess_get_initiator_sid != NULL) {
+ memset(&isid_buf[0], 0, PR_REG_ISID_LEN);
+ TPG_TFO(se_tpg)->sess_get_initiator_sid(se_sess, &isid_buf[0],
+ PR_REG_ISID_LEN);
+ isid_ptr = &isid_buf[0];
+ }
+ /*
+ * Follow logic from spc4r17 Section 5.7.7, Register Behaviors Table 47
+ */
+ pr_reg_e = core_scsi3_locate_pr_reg(dev, se_sess->se_node_acl, se_sess);
+ if (!(pr_reg_e)) {
+ if (res_key) {
+ printk(KERN_WARNING "SPC-3 PR: Reservation Key non-zero"
+ " for SA REGISTER, returning CONFLICT\n");
+ return PYX_TRANSPORT_RESERVATION_CONFLICT;
+ }
+ /*
+ * Do nothing but return GOOD status.
+ */
+ if (!(sa_res_key))
+ return PYX_TRANSPORT_SENT_TO_TRANSPORT;
+
+ if (!(spec_i_pt)) {
+ /*
+ * Perform the Service Action REGISTER on the Initiator
+ * Port Endpoint that the PRO was received from on the
+ * Logical Unit of the SCSI device server.
+ */
+ ret = core_scsi3_alloc_registration(SE_DEV(cmd),
+ se_sess->se_node_acl, se_deve, isid_ptr,
+ sa_res_key, all_tg_pt, aptpl,
+ ignore_key, 0);
+ if (ret != 0) {
+ printk(KERN_ERR "Unable to allocate"
+ " struct t10_pr_registration\n");
+ return PYX_TRANSPORT_INVALID_PARAMETER_LIST;
+ }
+ } else {
+ /*
+ * Register both the Initiator port that received
+ * PROUT SA REGISTER + SPEC_I_PT=1 and extract SCSI
+ * TransportID from Parameter list and loop through
+ * fabric dependent parameter list while calling
+ * logic from of core_scsi3_alloc_registration() for
+ * each TransportID provided SCSI Initiator Port/Device
+ */
+ ret = core_scsi3_decode_spec_i_port(cmd, se_tpg,
+ isid_ptr, sa_res_key, all_tg_pt, aptpl);
+ if (ret != 0)
+ return ret;
+ }
+ /*
+ * Nothing left to do for the APTPL=0 case.
+ */
+ if (!(aptpl)) {
+ pr_tmpl->pr_aptpl_active = 0;
+ core_scsi3_update_and_write_aptpl(SE_DEV(cmd), NULL, 0);
+ printk("SPC-3 PR: Set APTPL Bit Deactivated for"
+ " REGISTER\n");
+ return 0;
+ }
+ /*
+ * Locate the newly allocated local I_T Nexus *pr_reg, and
+ * update the APTPL metadata information using its
+ * preallocated *pr_reg->pr_aptpl_buf.
+ */
+ pr_reg = core_scsi3_locate_pr_reg(SE_DEV(cmd),
+ se_sess->se_node_acl, se_sess);
+
+ ret = core_scsi3_update_and_write_aptpl(SE_DEV(cmd),
+ &pr_reg->pr_aptpl_buf[0],
+ pr_tmpl->pr_aptpl_buf_len);
+ if (!(ret)) {
+ pr_tmpl->pr_aptpl_active = 1;
+ printk("SPC-3 PR: Set APTPL Bit Activated for REGISTER\n");
+ }
+
+ core_scsi3_put_pr_reg(pr_reg);
+ return ret;
+ } else {
+ /*
+ * Locate the existing *pr_reg via struct se_node_acl pointers
+ */
+ pr_reg = pr_reg_e;
+ type = pr_reg->pr_res_type;
+
+ if (!(ignore_key)) {
+ if (res_key != pr_reg->pr_res_key) {
+ printk(KERN_ERR "SPC-3 PR REGISTER: Received"
+ " res_key: 0x%016Lx does not match"
+ " existing SA REGISTER res_key:"
+ " 0x%016Lx\n", res_key,
+ pr_reg->pr_res_key);
+ core_scsi3_put_pr_reg(pr_reg);
+ return PYX_TRANSPORT_RESERVATION_CONFLICT;
+ }
+ }
+ if (spec_i_pt) {
+ printk(KERN_ERR "SPC-3 PR UNREGISTER: SPEC_I_PT"
+ " set while sa_res_key=0\n");
+ core_scsi3_put_pr_reg(pr_reg);
+ return PYX_TRANSPORT_INVALID_PARAMETER_LIST;
+ }
+ /*
+ * An existing ALL_TG_PT=1 registration being released
+ * must also set ALL_TG_PT=1 in the incoming PROUT.
+ */
+ if (pr_reg->pr_reg_all_tg_pt && !(all_tg_pt)) {
+ printk(KERN_ERR "SPC-3 PR UNREGISTER: ALL_TG_PT=1"
+ " registration exists, but ALL_TG_PT=1 bit not"
+ " present in received PROUT\n");
+ core_scsi3_put_pr_reg(pr_reg);
+ return PYX_TRANSPORT_INVALID_CDB_FIELD;
+ }
+ /*
+ * Allocate APTPL metadata buffer used for UNREGISTER ops
+ */
+ if (aptpl) {
+ pr_aptpl_buf = kzalloc(pr_tmpl->pr_aptpl_buf_len,
+ GFP_KERNEL);
+ if (!(pr_aptpl_buf)) {
+ printk(KERN_ERR "Unable to allocate"
+ " pr_aptpl_buf\n");
+ core_scsi3_put_pr_reg(pr_reg);
+ return PYX_TRANSPORT_LU_COMM_FAILURE;
+ }
+ }
+ /*
+ * sa_res_key=0 Unregister Reservation Key for registered I_T
+ * Nexus sa_res_key=1 Change Reservation Key for registered I_T
+ * Nexus.
+ */
+ if (!(sa_res_key)) {
+ pr_holder = core_scsi3_check_implict_release(
+ SE_DEV(cmd), pr_reg);
+ if (pr_holder < 0) {
+ kfree(pr_aptpl_buf);
+ core_scsi3_put_pr_reg(pr_reg);
+ return PYX_TRANSPORT_RESERVATION_CONFLICT;
+ }
+
+ spin_lock(&pr_tmpl->registration_lock);
+ /*
+ * Release all ALL_TG_PT=1 for the matching SCSI Initiator Port
+ * and matching pr_res_key.
+ */
+ if (pr_reg->pr_reg_all_tg_pt) {
+ list_for_each_entry_safe(pr_reg_p, pr_reg_tmp,
+ &pr_tmpl->registration_list,
+ pr_reg_list) {
+
+ if (!(pr_reg_p->pr_reg_all_tg_pt))
+ continue;
+
+ if (pr_reg_p->pr_res_key != res_key)
+ continue;
+
+ if (pr_reg == pr_reg_p)
+ continue;
+
+ if (strcmp(pr_reg->pr_reg_nacl->initiatorname,
+ pr_reg_p->pr_reg_nacl->initiatorname))
+ continue;
+
+ __core_scsi3_free_registration(dev,
+ pr_reg_p, NULL, 0);
+ }
+ }
+ /*
+ * Release the calling I_T Nexus registration now..
+ */
+ __core_scsi3_free_registration(SE_DEV(cmd), pr_reg,
+ NULL, 1);
+ /*
+ * From spc4r17, section 5.7.11.3 Unregistering
+ *
+ * If the persistent reservation is a registrants only
+ * type, the device server shall establish a unit
+ * attention condition for the initiator port associated
+ * with every registered I_T nexus except for the I_T
+ * nexus on which the PERSISTENT RESERVE OUT command was
+ * received, with the additional sense code set to
+ * RESERVATIONS RELEASED.
+ */
+ if (pr_holder &&
+ ((type == PR_TYPE_WRITE_EXCLUSIVE_REGONLY) ||
+ (type == PR_TYPE_EXCLUSIVE_ACCESS_REGONLY))) {
+ list_for_each_entry(pr_reg_p,
+ &pr_tmpl->registration_list,
+ pr_reg_list) {
+
+ core_scsi3_ua_allocate(
+ pr_reg_p->pr_reg_nacl,
+ pr_reg_p->pr_res_mapped_lun,
+ 0x2A,
+ ASCQ_2AH_RESERVATIONS_RELEASED);
+ }
+ }
+ spin_unlock(&pr_tmpl->registration_lock);
+
+ if (!(aptpl)) {
+ pr_tmpl->pr_aptpl_active = 0;
+ core_scsi3_update_and_write_aptpl(dev, NULL, 0);
+ printk("SPC-3 PR: Set APTPL Bit Deactivated"
+ " for UNREGISTER\n");
+ return 0;
+ }
+
+ ret = core_scsi3_update_and_write_aptpl(dev,
+ &pr_aptpl_buf[0],
+ pr_tmpl->pr_aptpl_buf_len);
+ if (!(ret)) {
+ pr_tmpl->pr_aptpl_active = 1;
+ printk("SPC-3 PR: Set APTPL Bit Activated"
+ " for UNREGISTER\n");
+ }
+
+ kfree(pr_aptpl_buf);
+ return ret;
+ } else {
+ /*
+ * Increment PRgeneration counter for struct se_device"
+ * upon a successful REGISTER, see spc4r17 section 6.3.2
+ * READ_KEYS service action.
+ */
+ pr_reg->pr_res_generation = core_scsi3_pr_generation(
+ SE_DEV(cmd));
+ pr_reg->pr_res_key = sa_res_key;
+ printk("SPC-3 PR [%s] REGISTER%s: Changed Reservation"
+ " Key for %s to: 0x%016Lx PRgeneration:"
+ " 0x%08x\n", CMD_TFO(cmd)->get_fabric_name(),
+ (ignore_key) ? "_AND_IGNORE_EXISTING_KEY" : "",
+ pr_reg->pr_reg_nacl->initiatorname,
+ pr_reg->pr_res_key, pr_reg->pr_res_generation);
+
+ if (!(aptpl)) {
+ pr_tmpl->pr_aptpl_active = 0;
+ core_scsi3_update_and_write_aptpl(dev, NULL, 0);
+ printk("SPC-3 PR: Set APTPL Bit Deactivated"
+ " for REGISTER\n");
+ return 0;
+ }
+
+ ret = core_scsi3_update_and_write_aptpl(dev,
+ &pr_aptpl_buf[0],
+ pr_tmpl->pr_aptpl_buf_len);
+ if (!(ret)) {
+ pr_tmpl->pr_aptpl_active = 1;
+ printk("SPC-3 PR: Set APTPL Bit Activated"
+ " for REGISTER\n");
+ }
+
+ kfree(pr_aptpl_buf);
+ core_scsi3_put_pr_reg(pr_reg);
+ }
+ }
+ return 0;
+}
+
+unsigned char *core_scsi3_pr_dump_type(int type)
+{
+ switch (type) {
+ case PR_TYPE_WRITE_EXCLUSIVE:
+ return "Write Exclusive Access";
+ case PR_TYPE_EXCLUSIVE_ACCESS:
+ return "Exclusive Access";
+ case PR_TYPE_WRITE_EXCLUSIVE_REGONLY:
+ return "Write Exclusive Access, Registrants Only";
+ case PR_TYPE_EXCLUSIVE_ACCESS_REGONLY:
+ return "Exclusive Access, Registrants Only";
+ case PR_TYPE_WRITE_EXCLUSIVE_ALLREG:
+ return "Write Exclusive Access, All Registrants";
+ case PR_TYPE_EXCLUSIVE_ACCESS_ALLREG:
+ return "Exclusive Access, All Registrants";
+ default:
+ break;
+ }
+
+ return "Unknown SPC-3 PR Type";
+}
+
+static int core_scsi3_pro_reserve(
+ struct se_cmd *cmd,
+ struct se_device *dev,
+ int type,
+ int scope,
+ u64 res_key)
+{
+ struct se_session *se_sess = SE_SESS(cmd);
+ struct se_dev_entry *se_deve;
+ struct se_lun *se_lun = SE_LUN(cmd);
+ struct se_portal_group *se_tpg;
+ struct t10_pr_registration *pr_reg, *pr_res_holder;
+ struct t10_reservation_template *pr_tmpl = &SU_DEV(dev)->t10_reservation;
+ char i_buf[PR_REG_ISID_ID_LEN];
+ int ret, prf_isid;
+
+ memset(i_buf, 0, PR_REG_ISID_ID_LEN);
+
+ if (!(se_sess) || !(se_lun)) {
+ printk(KERN_ERR "SPC-3 PR: se_sess || struct se_lun is NULL!\n");
+ return PYX_TRANSPORT_LU_COMM_FAILURE;
+ }
+ se_tpg = se_sess->se_tpg;
+ se_deve = &se_sess->se_node_acl->device_list[cmd->orig_fe_lun];
+ /*
+ * Locate the existing *pr_reg via struct se_node_acl pointers
+ */
+ pr_reg = core_scsi3_locate_pr_reg(SE_DEV(cmd), se_sess->se_node_acl,
+ se_sess);
+ if (!(pr_reg)) {
+ printk(KERN_ERR "SPC-3 PR: Unable to locate"
+ " PR_REGISTERED *pr_reg for RESERVE\n");
+ return PYX_TRANSPORT_LU_COMM_FAILURE;
+ }
+ /*
+ * From spc4r17 Section 5.7.9: Reserving:
+ *
+ * An application client creates a persistent reservation by issuing
+ * a PERSISTENT RESERVE OUT command with RESERVE service action through
+ * a registered I_T nexus with the following parameters:
+ * a) RESERVATION KEY set to the value of the reservation key that is
+ * registered with the logical unit for the I_T nexus; and
+ */
+ if (res_key != pr_reg->pr_res_key) {
+ printk(KERN_ERR "SPC-3 PR RESERVE: Received res_key: 0x%016Lx"
+ " does not match existing SA REGISTER res_key:"
+ " 0x%016Lx\n", res_key, pr_reg->pr_res_key);
+ core_scsi3_put_pr_reg(pr_reg);
+ return PYX_TRANSPORT_RESERVATION_CONFLICT;
+ }
+ /*
+ * From spc4r17 Section 5.7.9: Reserving:
+ *
+ * From above:
+ * b) TYPE field and SCOPE field set to the persistent reservation
+ * being created.
+ *
+ * Only one persistent reservation is allowed at a time per logical unit
+ * and that persistent reservation has a scope of LU_SCOPE.
+ */
+ if (scope != PR_SCOPE_LU_SCOPE) {
+ printk(KERN_ERR "SPC-3 PR: Illegal SCOPE: 0x%02x\n", scope);
+ core_scsi3_put_pr_reg(pr_reg);
+ return PYX_TRANSPORT_INVALID_PARAMETER_LIST;
+ }
+ /*
+ * See if we have an existing PR reservation holder pointer at
+ * struct se_device->dev_pr_res_holder in the form struct t10_pr_registration
+ * *pr_res_holder.
+ */
+ spin_lock(&dev->dev_reservation_lock);
+ pr_res_holder = dev->dev_pr_res_holder;
+ if ((pr_res_holder)) {
+ /*
+ * From spc4r17 Section 5.7.9: Reserving:
+ *
+ * If the device server receives a PERSISTENT RESERVE OUT
+ * command from an I_T nexus other than a persistent reservation
+ * holder (see 5.7.10) that attempts to create a persistent
+ * reservation when a persistent reservation already exists for
+ * the logical unit, then the command shall be completed with
+ * RESERVATION CONFLICT status.
+ */
+ if (pr_res_holder != pr_reg) {
+ struct se_node_acl *pr_res_nacl = pr_res_holder->pr_reg_nacl;
+ printk(KERN_ERR "SPC-3 PR: Attempted RESERVE from"
+ " [%s]: %s while reservation already held by"
+ " [%s]: %s, returning RESERVATION_CONFLICT\n",
+ CMD_TFO(cmd)->get_fabric_name(),
+ se_sess->se_node_acl->initiatorname,
+ TPG_TFO(pr_res_nacl->se_tpg)->get_fabric_name(),
+ pr_res_holder->pr_reg_nacl->initiatorname);
+
+ spin_unlock(&dev->dev_reservation_lock);
+ core_scsi3_put_pr_reg(pr_reg);
+ return PYX_TRANSPORT_RESERVATION_CONFLICT;
+ }
+ /*
+ * From spc4r17 Section 5.7.9: Reserving:
+ *
+ * If a persistent reservation holder attempts to modify the
+ * type or scope of an existing persistent reservation, the
+ * command shall be completed with RESERVATION CONFLICT status.
+ */
+ if ((pr_res_holder->pr_res_type != type) ||
+ (pr_res_holder->pr_res_scope != scope)) {
+ struct se_node_acl *pr_res_nacl = pr_res_holder->pr_reg_nacl;
+ printk(KERN_ERR "SPC-3 PR: Attempted RESERVE from"
+ " [%s]: %s trying to change TYPE and/or SCOPE,"
+ " while reservation already held by [%s]: %s,"
+ " returning RESERVATION_CONFLICT\n",
+ CMD_TFO(cmd)->get_fabric_name(),
+ se_sess->se_node_acl->initiatorname,
+ TPG_TFO(pr_res_nacl->se_tpg)->get_fabric_name(),
+ pr_res_holder->pr_reg_nacl->initiatorname);
+
+ spin_unlock(&dev->dev_reservation_lock);
+ core_scsi3_put_pr_reg(pr_reg);
+ return PYX_TRANSPORT_RESERVATION_CONFLICT;
+ }
+ /*
+ * From spc4r17 Section 5.7.9: Reserving:
+ *
+ * If the device server receives a PERSISTENT RESERVE OUT
+ * command with RESERVE service action where the TYPE field and
+ * the SCOPE field contain the same values as the existing type
+ * and scope from a persistent reservation holder, it shall not
+ * make any change to the existing persistent reservation and
+ * shall completethe command with GOOD status.
+ */
+ spin_unlock(&dev->dev_reservation_lock);
+ core_scsi3_put_pr_reg(pr_reg);
+ return PYX_TRANSPORT_SENT_TO_TRANSPORT;
+ }
+ /*
+ * Otherwise, our *pr_reg becomes the PR reservation holder for said
+ * TYPE/SCOPE. Also set the received scope and type in *pr_reg.
+ */
+ pr_reg->pr_res_scope = scope;
+ pr_reg->pr_res_type = type;
+ pr_reg->pr_res_holder = 1;
+ dev->dev_pr_res_holder = pr_reg;
+ prf_isid = core_pr_dump_initiator_port(pr_reg, &i_buf[0],
+ PR_REG_ISID_ID_LEN);
+
+ printk(KERN_INFO "SPC-3 PR [%s] Service Action: RESERVE created new"
+ " reservation holder TYPE: %s ALL_TG_PT: %d\n",
+ CMD_TFO(cmd)->get_fabric_name(), core_scsi3_pr_dump_type(type),
+ (pr_reg->pr_reg_all_tg_pt) ? 1 : 0);
+ printk(KERN_INFO "SPC-3 PR [%s] RESERVE Node: %s%s\n",
+ CMD_TFO(cmd)->get_fabric_name(),
+ se_sess->se_node_acl->initiatorname,
+ (prf_isid) ? &i_buf[0] : "");
+ spin_unlock(&dev->dev_reservation_lock);
+
+ if (pr_tmpl->pr_aptpl_active) {
+ ret = core_scsi3_update_and_write_aptpl(SE_DEV(cmd),
+ &pr_reg->pr_aptpl_buf[0],
+ pr_tmpl->pr_aptpl_buf_len);
+ if (!(ret))
+ printk(KERN_INFO "SPC-3 PR: Updated APTPL metadata"
+ " for RESERVE\n");
+ }
+
+ core_scsi3_put_pr_reg(pr_reg);
+ return 0;
+}
+
+static int core_scsi3_emulate_pro_reserve(
+ struct se_cmd *cmd,
+ int type,
+ int scope,
+ u64 res_key)
+{
+ struct se_device *dev = cmd->se_dev;
+ int ret = 0;
+
+ switch (type) {
+ case PR_TYPE_WRITE_EXCLUSIVE:
+ case PR_TYPE_EXCLUSIVE_ACCESS:
+ case PR_TYPE_WRITE_EXCLUSIVE_REGONLY:
+ case PR_TYPE_EXCLUSIVE_ACCESS_REGONLY:
+ case PR_TYPE_WRITE_EXCLUSIVE_ALLREG:
+ case PR_TYPE_EXCLUSIVE_ACCESS_ALLREG:
+ ret = core_scsi3_pro_reserve(cmd, dev, type, scope, res_key);
+ break;
+ default:
+ printk(KERN_ERR "SPC-3 PR: Unknown Service Action RESERVE Type:"
+ " 0x%02x\n", type);
+ return PYX_TRANSPORT_INVALID_CDB_FIELD;
+ }
+
+ return ret;
+}
+
+/*
+ * Called with struct se_device->dev_reservation_lock held.
+ */
+static void __core_scsi3_complete_pro_release(
+ struct se_device *dev,
+ struct se_node_acl *se_nacl,
+ struct t10_pr_registration *pr_reg,
+ int explict)
+{
+ struct target_core_fabric_ops *tfo = se_nacl->se_tpg->se_tpg_tfo;
+ char i_buf[PR_REG_ISID_ID_LEN];
+ int prf_isid;
+
+ memset(i_buf, 0, PR_REG_ISID_ID_LEN);
+ prf_isid = core_pr_dump_initiator_port(pr_reg, &i_buf[0],
+ PR_REG_ISID_ID_LEN);
+ /*
+ * Go ahead and release the current PR reservation holder.
+ */
+ dev->dev_pr_res_holder = NULL;
+
+ printk(KERN_INFO "SPC-3 PR [%s] Service Action: %s RELEASE cleared"
+ " reservation holder TYPE: %s ALL_TG_PT: %d\n",
+ tfo->get_fabric_name(), (explict) ? "explict" : "implict",
+ core_scsi3_pr_dump_type(pr_reg->pr_res_type),
+ (pr_reg->pr_reg_all_tg_pt) ? 1 : 0);
+ printk(KERN_INFO "SPC-3 PR [%s] RELEASE Node: %s%s\n",
+ tfo->get_fabric_name(), se_nacl->initiatorname,
+ (prf_isid) ? &i_buf[0] : "");
+ /*
+ * Clear TYPE and SCOPE for the next PROUT Service Action: RESERVE
+ */
+ pr_reg->pr_res_holder = pr_reg->pr_res_type = pr_reg->pr_res_scope = 0;
+}
+
+static int core_scsi3_emulate_pro_release(
+ struct se_cmd *cmd,
+ int type,
+ int scope,
+ u64 res_key)
+{
+ struct se_device *dev = cmd->se_dev;
+ struct se_session *se_sess = SE_SESS(cmd);
+ struct se_lun *se_lun = SE_LUN(cmd);
+ struct t10_pr_registration *pr_reg, *pr_reg_p, *pr_res_holder;
+ struct t10_reservation_template *pr_tmpl = &SU_DEV(dev)->t10_reservation;
+ int ret, all_reg = 0;
+
+ if (!(se_sess) || !(se_lun)) {
+ printk(KERN_ERR "SPC-3 PR: se_sess || struct se_lun is NULL!\n");
+ return PYX_TRANSPORT_LU_COMM_FAILURE;
+ }
+ /*
+ * Locate the existing *pr_reg via struct se_node_acl pointers
+ */
+ pr_reg = core_scsi3_locate_pr_reg(dev, se_sess->se_node_acl, se_sess);
+ if (!(pr_reg)) {
+ printk(KERN_ERR "SPC-3 PR: Unable to locate"
+ " PR_REGISTERED *pr_reg for RELEASE\n");
+ return PYX_TRANSPORT_LU_COMM_FAILURE;
+ }
+ /*
+ * From spc4r17 Section 5.7.11.2 Releasing:
+ *
+ * If there is no persistent reservation or in response to a persistent
+ * reservation release request from a registered I_T nexus that is not a
+ * persistent reservation holder (see 5.7.10), the device server shall
+ * do the following:
+ *
+ * a) Not release the persistent reservation, if any;
+ * b) Not remove any registrations; and
+ * c) Complete the command with GOOD status.
+ */
+ spin_lock(&dev->dev_reservation_lock);
+ pr_res_holder = dev->dev_pr_res_holder;
+ if (!(pr_res_holder)) {
+ /*
+ * No persistent reservation, return GOOD status.
+ */
+ spin_unlock(&dev->dev_reservation_lock);
+ core_scsi3_put_pr_reg(pr_reg);
+ return PYX_TRANSPORT_SENT_TO_TRANSPORT;
+ }
+ if ((pr_res_holder->pr_res_type == PR_TYPE_WRITE_EXCLUSIVE_ALLREG) ||
+ (pr_res_holder->pr_res_type == PR_TYPE_EXCLUSIVE_ACCESS_ALLREG))
+ all_reg = 1;
+
+ if ((all_reg == 0) && (pr_res_holder != pr_reg)) {
+ /*
+ * Non 'All Registrants' PR Type cases..
+ * Release request from a registered I_T nexus that is not a
+ * persistent reservation holder. return GOOD status.
+ */
+ spin_unlock(&dev->dev_reservation_lock);
+ core_scsi3_put_pr_reg(pr_reg);
+ return PYX_TRANSPORT_SENT_TO_TRANSPORT;
+ }
+ /*
+ * From spc4r17 Section 5.7.11.2 Releasing:
+ *
+ * Only the persistent reservation holder (see 5.7.10) is allowed to
+ * release a persistent reservation.
+ *
+ * An application client releases the persistent reservation by issuing
+ * a PERSISTENT RESERVE OUT command with RELEASE service action through
+ * an I_T nexus that is a persistent reservation holder with the
+ * following parameters:
+ *
+ * a) RESERVATION KEY field set to the value of the reservation key
+ * that is registered with the logical unit for the I_T nexus;
+ */
+ if (res_key != pr_reg->pr_res_key) {
+ printk(KERN_ERR "SPC-3 PR RELEASE: Received res_key: 0x%016Lx"
+ " does not match existing SA REGISTER res_key:"
+ " 0x%016Lx\n", res_key, pr_reg->pr_res_key);
+ spin_unlock(&dev->dev_reservation_lock);
+ core_scsi3_put_pr_reg(pr_reg);
+ return PYX_TRANSPORT_RESERVATION_CONFLICT;
+ }
+ /*
+ * From spc4r17 Section 5.7.11.2 Releasing and above:
+ *
+ * b) TYPE field and SCOPE field set to match the persistent
+ * reservation being released.
+ */
+ if ((pr_res_holder->pr_res_type != type) ||
+ (pr_res_holder->pr_res_scope != scope)) {
+ struct se_node_acl *pr_res_nacl = pr_res_holder->pr_reg_nacl;
+ printk(KERN_ERR "SPC-3 PR RELEASE: Attempted to release"
+ " reservation from [%s]: %s with different TYPE "
+ "and/or SCOPE while reservation already held by"
+ " [%s]: %s, returning RESERVATION_CONFLICT\n",
+ CMD_TFO(cmd)->get_fabric_name(),
+ se_sess->se_node_acl->initiatorname,
+ TPG_TFO(pr_res_nacl->se_tpg)->get_fabric_name(),
+ pr_res_holder->pr_reg_nacl->initiatorname);
+
+ spin_unlock(&dev->dev_reservation_lock);
+ core_scsi3_put_pr_reg(pr_reg);
+ return PYX_TRANSPORT_RESERVATION_CONFLICT;
+ }
+ /*
+ * In response to a persistent reservation release request from the
+ * persistent reservation holder the device server shall perform a
+ * release by doing the following as an uninterrupted series of actions:
+ * a) Release the persistent reservation;
+ * b) Not remove any registration(s);
+ * c) If the released persistent reservation is a registrants only type
+ * or all registrants type persistent reservation,
+ * the device server shall establish a unit attention condition for
+ * the initiator port associated with every regis-
+ * tered I_T nexus other than I_T nexus on which the PERSISTENT
+ * RESERVE OUT command with RELEASE service action was received,
+ * with the additional sense code set to RESERVATIONS RELEASED; and
+ * d) If the persistent reservation is of any other type, the device
+ * server shall not establish a unit attention condition.
+ */
+ __core_scsi3_complete_pro_release(dev, se_sess->se_node_acl,
+ pr_reg, 1);
+
+ spin_unlock(&dev->dev_reservation_lock);
+
+ if ((type != PR_TYPE_WRITE_EXCLUSIVE_REGONLY) &&
+ (type != PR_TYPE_EXCLUSIVE_ACCESS_REGONLY) &&
+ (type != PR_TYPE_WRITE_EXCLUSIVE_ALLREG) &&
+ (type != PR_TYPE_EXCLUSIVE_ACCESS_ALLREG)) {
+ /*
+ * If no UNIT ATTENTION conditions will be established for
+ * PR_TYPE_WRITE_EXCLUSIVE or PR_TYPE_EXCLUSIVE_ACCESS
+ * go ahead and check for APTPL=1 update+write below
+ */
+ goto write_aptpl;
+ }
+
+ spin_lock(&pr_tmpl->registration_lock);
+ list_for_each_entry(pr_reg_p, &pr_tmpl->registration_list,
+ pr_reg_list) {
+ /*
+ * Do not establish a UNIT ATTENTION condition
+ * for the calling I_T Nexus
+ */
+ if (pr_reg_p == pr_reg)
+ continue;
+
+ core_scsi3_ua_allocate(pr_reg_p->pr_reg_nacl,
+ pr_reg_p->pr_res_mapped_lun,
+ 0x2A, ASCQ_2AH_RESERVATIONS_RELEASED);
+ }
+ spin_unlock(&pr_tmpl->registration_lock);
+
+write_aptpl:
+ if (pr_tmpl->pr_aptpl_active) {
+ ret = core_scsi3_update_and_write_aptpl(SE_DEV(cmd),
+ &pr_reg->pr_aptpl_buf[0],
+ pr_tmpl->pr_aptpl_buf_len);
+ if (!(ret))
+ printk("SPC-3 PR: Updated APTPL metadata for RELEASE\n");
+ }
+
+ core_scsi3_put_pr_reg(pr_reg);
+ return 0;
+}
+
+static int core_scsi3_emulate_pro_clear(
+ struct se_cmd *cmd,
+ u64 res_key)
+{
+ struct se_device *dev = cmd->se_dev;
+ struct se_node_acl *pr_reg_nacl;
+ struct se_session *se_sess = SE_SESS(cmd);
+ struct t10_reservation_template *pr_tmpl = &SU_DEV(dev)->t10_reservation;
+ struct t10_pr_registration *pr_reg, *pr_reg_tmp, *pr_reg_n, *pr_res_holder;
+ u32 pr_res_mapped_lun = 0;
+ int calling_it_nexus = 0;
+ /*
+ * Locate the existing *pr_reg via struct se_node_acl pointers
+ */
+ pr_reg_n = core_scsi3_locate_pr_reg(SE_DEV(cmd),
+ se_sess->se_node_acl, se_sess);
+ if (!(pr_reg_n)) {
+ printk(KERN_ERR "SPC-3 PR: Unable to locate"
+ " PR_REGISTERED *pr_reg for CLEAR\n");
+ return PYX_TRANSPORT_LU_COMM_FAILURE;
+ }
+ /*
+ * From spc4r17 section 5.7.11.6, Clearing:
+ *
+ * Any application client may release the persistent reservation and
+ * remove all registrations from a device server by issuing a
+ * PERSISTENT RESERVE OUT command with CLEAR service action through a
+ * registered I_T nexus with the following parameter:
+ *
+ * a) RESERVATION KEY field set to the value of the reservation key
+ * that is registered with the logical unit for the I_T nexus.
+ */
+ if (res_key != pr_reg_n->pr_res_key) {
+ printk(KERN_ERR "SPC-3 PR REGISTER: Received"
+ " res_key: 0x%016Lx does not match"
+ " existing SA REGISTER res_key:"
+ " 0x%016Lx\n", res_key, pr_reg_n->pr_res_key);
+ core_scsi3_put_pr_reg(pr_reg_n);
+ return PYX_TRANSPORT_RESERVATION_CONFLICT;
+ }
+ /*
+ * a) Release the persistent reservation, if any;
+ */
+ spin_lock(&dev->dev_reservation_lock);
+ pr_res_holder = dev->dev_pr_res_holder;
+ if (pr_res_holder) {
+ struct se_node_acl *pr_res_nacl = pr_res_holder->pr_reg_nacl;
+ __core_scsi3_complete_pro_release(dev, pr_res_nacl,
+ pr_res_holder, 0);
+ }
+ spin_unlock(&dev->dev_reservation_lock);
+ /*
+ * b) Remove all registration(s) (see spc4r17 5.7.7);
+ */
+ spin_lock(&pr_tmpl->registration_lock);
+ list_for_each_entry_safe(pr_reg, pr_reg_tmp,
+ &pr_tmpl->registration_list, pr_reg_list) {
+
+ calling_it_nexus = (pr_reg_n == pr_reg) ? 1 : 0;
+ pr_reg_nacl = pr_reg->pr_reg_nacl;
+ pr_res_mapped_lun = pr_reg->pr_res_mapped_lun;
+ __core_scsi3_free_registration(dev, pr_reg, NULL,
+ calling_it_nexus);
+ /*
+ * e) Establish a unit attention condition for the initiator
+ * port associated with every registered I_T nexus other
+ * than the I_T nexus on which the PERSISTENT RESERVE OUT
+ * command with CLEAR service action was received, with the
+ * additional sense code set to RESERVATIONS PREEMPTED.
+ */
+ if (!(calling_it_nexus))
+ core_scsi3_ua_allocate(pr_reg_nacl, pr_res_mapped_lun,
+ 0x2A, ASCQ_2AH_RESERVATIONS_PREEMPTED);
+ }
+ spin_unlock(&pr_tmpl->registration_lock);
+
+ printk(KERN_INFO "SPC-3 PR [%s] Service Action: CLEAR complete\n",
+ CMD_TFO(cmd)->get_fabric_name());
+
+ if (pr_tmpl->pr_aptpl_active) {
+ core_scsi3_update_and_write_aptpl(SE_DEV(cmd), NULL, 0);
+ printk(KERN_INFO "SPC-3 PR: Updated APTPL metadata"
+ " for CLEAR\n");
+ }
+
+ core_scsi3_pr_generation(dev);
+ return 0;
+}
+
+/*
+ * Called with struct se_device->dev_reservation_lock held.
+ */
+static void __core_scsi3_complete_pro_preempt(
+ struct se_device *dev,
+ struct t10_pr_registration *pr_reg,
+ struct list_head *preempt_and_abort_list,
+ int type,
+ int scope,
+ int abort)
+{
+ struct se_node_acl *nacl = pr_reg->pr_reg_nacl;
+ struct target_core_fabric_ops *tfo = nacl->se_tpg->se_tpg_tfo;
+ char i_buf[PR_REG_ISID_ID_LEN];
+ int prf_isid;
+
+ memset(i_buf, 0, PR_REG_ISID_ID_LEN);
+ prf_isid = core_pr_dump_initiator_port(pr_reg, &i_buf[0],
+ PR_REG_ISID_ID_LEN);
+ /*
+ * Do an implict RELEASE of the existing reservation.
+ */
+ if (dev->dev_pr_res_holder)
+ __core_scsi3_complete_pro_release(dev, nacl,
+ dev->dev_pr_res_holder, 0);
+
+ dev->dev_pr_res_holder = pr_reg;
+ pr_reg->pr_res_holder = 1;
+ pr_reg->pr_res_type = type;
+ pr_reg->pr_res_scope = scope;
+
+ printk(KERN_INFO "SPC-3 PR [%s] Service Action: PREEMPT%s created new"
+ " reservation holder TYPE: %s ALL_TG_PT: %d\n",
+ tfo->get_fabric_name(), (abort) ? "_AND_ABORT" : "",
+ core_scsi3_pr_dump_type(type),
+ (pr_reg->pr_reg_all_tg_pt) ? 1 : 0);
+ printk(KERN_INFO "SPC-3 PR [%s] PREEMPT%s from Node: %s%s\n",
+ tfo->get_fabric_name(), (abort) ? "_AND_ABORT" : "",
+ nacl->initiatorname, (prf_isid) ? &i_buf[0] : "");
+ /*
+ * For PREEMPT_AND_ABORT, add the preempting reservation's
+ * struct t10_pr_registration to the list that will be compared
+ * against received CDBs..
+ */
+ if (preempt_and_abort_list)
+ list_add_tail(&pr_reg->pr_reg_abort_list,
+ preempt_and_abort_list);
+}
+
+static void core_scsi3_release_preempt_and_abort(
+ struct list_head *preempt_and_abort_list,
+ struct t10_pr_registration *pr_reg_holder)
+{
+ struct t10_pr_registration *pr_reg, *pr_reg_tmp;
+
+ list_for_each_entry_safe(pr_reg, pr_reg_tmp, preempt_and_abort_list,
+ pr_reg_abort_list) {
+
+ list_del(&pr_reg->pr_reg_abort_list);
+ if (pr_reg_holder == pr_reg)
+ continue;
+ if (pr_reg->pr_res_holder) {
+ printk(KERN_WARNING "pr_reg->pr_res_holder still set\n");
+ continue;
+ }
+
+ pr_reg->pr_reg_deve = NULL;
+ pr_reg->pr_reg_nacl = NULL;
+ kfree(pr_reg->pr_aptpl_buf);
+ kmem_cache_free(t10_pr_reg_cache, pr_reg);
+ }
+}
+
+int core_scsi3_check_cdb_abort_and_preempt(
+ struct list_head *preempt_and_abort_list,
+ struct se_cmd *cmd)
+{
+ struct t10_pr_registration *pr_reg, *pr_reg_tmp;
+
+ list_for_each_entry_safe(pr_reg, pr_reg_tmp, preempt_and_abort_list,
+ pr_reg_abort_list) {
+ if (pr_reg->pr_res_key == cmd->pr_res_key)
+ return 0;
+ }
+
+ return 1;
+}
+
+static int core_scsi3_pro_preempt(
+ struct se_cmd *cmd,
+ int type,
+ int scope,
+ u64 res_key,
+ u64 sa_res_key,
+ int abort)
+{
+ struct se_device *dev = SE_DEV(cmd);
+ struct se_dev_entry *se_deve;
+ struct se_node_acl *pr_reg_nacl;
+ struct se_session *se_sess = SE_SESS(cmd);
+ struct list_head preempt_and_abort_list;
+ struct t10_pr_registration *pr_reg, *pr_reg_tmp, *pr_reg_n, *pr_res_holder;
+ struct t10_reservation_template *pr_tmpl = &SU_DEV(dev)->t10_reservation;
+ u32 pr_res_mapped_lun = 0;
+ int all_reg = 0, calling_it_nexus = 0, released_regs = 0;
+ int prh_type = 0, prh_scope = 0, ret;
+
+ if (!(se_sess))
+ return PYX_TRANSPORT_LU_COMM_FAILURE;
+
+ se_deve = &se_sess->se_node_acl->device_list[cmd->orig_fe_lun];
+ pr_reg_n = core_scsi3_locate_pr_reg(SE_DEV(cmd), se_sess->se_node_acl,
+ se_sess);
+ if (!(pr_reg_n)) {
+ printk(KERN_ERR "SPC-3 PR: Unable to locate"
+ " PR_REGISTERED *pr_reg for PREEMPT%s\n",
+ (abort) ? "_AND_ABORT" : "");
+ return PYX_TRANSPORT_RESERVATION_CONFLICT;
+ }
+ if (pr_reg_n->pr_res_key != res_key) {
+ core_scsi3_put_pr_reg(pr_reg_n);
+ return PYX_TRANSPORT_RESERVATION_CONFLICT;
+ }
+ if (scope != PR_SCOPE_LU_SCOPE) {
+ printk(KERN_ERR "SPC-3 PR: Illegal SCOPE: 0x%02x\n", scope);
+ core_scsi3_put_pr_reg(pr_reg_n);
+ return PYX_TRANSPORT_INVALID_PARAMETER_LIST;
+ }
+ INIT_LIST_HEAD(&preempt_and_abort_list);
+
+ spin_lock(&dev->dev_reservation_lock);
+ pr_res_holder = dev->dev_pr_res_holder;
+ if (pr_res_holder &&
+ ((pr_res_holder->pr_res_type == PR_TYPE_WRITE_EXCLUSIVE_ALLREG) ||
+ (pr_res_holder->pr_res_type == PR_TYPE_EXCLUSIVE_ACCESS_ALLREG)))
+ all_reg = 1;
+
+ if (!(all_reg) && !(sa_res_key)) {
+ spin_unlock(&dev->dev_reservation_lock);
+ core_scsi3_put_pr_reg(pr_reg_n);
+ return PYX_TRANSPORT_INVALID_PARAMETER_LIST;
+ }
+ /*
+ * From spc4r17, section 5.7.11.4.4 Removing Registrations:
+ *
+ * If the SERVICE ACTION RESERVATION KEY field does not identify a
+ * persistent reservation holder or there is no persistent reservation
+ * holder (i.e., there is no persistent reservation), then the device
+ * server shall perform a preempt by doing the following in an
+ * uninterrupted series of actions. (See below..)
+ */
+ if (!(pr_res_holder) || (pr_res_holder->pr_res_key != sa_res_key)) {
+ /*
+ * No existing or SA Reservation Key matching reservations..
+ *
+ * PROUT SA PREEMPT with All Registrant type reservations are
+ * allowed to be processed without a matching SA Reservation Key
+ */
+ spin_lock(&pr_tmpl->registration_lock);
+ list_for_each_entry_safe(pr_reg, pr_reg_tmp,
+ &pr_tmpl->registration_list, pr_reg_list) {
+ /*
+ * Removing of registrations in non all registrants
+ * type reservations without a matching SA reservation
+ * key.
+ *
+ * a) Remove the registrations for all I_T nexuses
+ * specified by the SERVICE ACTION RESERVATION KEY
+ * field;
+ * b) Ignore the contents of the SCOPE and TYPE fields;
+ * c) Process tasks as defined in 5.7.1; and
+ * d) Establish a unit attention condition for the
+ * initiator port associated with every I_T nexus
+ * that lost its registration other than the I_T
+ * nexus on which the PERSISTENT RESERVE OUT command
+ * was received, with the additional sense code set
+ * to REGISTRATIONS PREEMPTED.
+ */
+ if (!(all_reg)) {
+ if (pr_reg->pr_res_key != sa_res_key)
+ continue;
+
+ calling_it_nexus = (pr_reg_n == pr_reg) ? 1 : 0;
+ pr_reg_nacl = pr_reg->pr_reg_nacl;
+ pr_res_mapped_lun = pr_reg->pr_res_mapped_lun;
+ __core_scsi3_free_registration(dev, pr_reg,
+ (abort) ? &preempt_and_abort_list :
+ NULL, calling_it_nexus);
+ released_regs++;
+ } else {
+ /*
+ * Case for any existing all registrants type
+ * reservation, follow logic in spc4r17 section
+ * 5.7.11.4 Preempting, Table 52 and Figure 7.
+ *
+ * For a ZERO SA Reservation key, release
+ * all other registrations and do an implict
+ * release of active persistent reservation.
+ *
+ * For a non-ZERO SA Reservation key, only
+ * release the matching reservation key from
+ * registrations.
+ */
+ if ((sa_res_key) &&
+ (pr_reg->pr_res_key != sa_res_key))
+ continue;
+
+ calling_it_nexus = (pr_reg_n == pr_reg) ? 1 : 0;
+ if (calling_it_nexus)
+ continue;
+
+ pr_reg_nacl = pr_reg->pr_reg_nacl;
+ pr_res_mapped_lun = pr_reg->pr_res_mapped_lun;
+ __core_scsi3_free_registration(dev, pr_reg,
+ (abort) ? &preempt_and_abort_list :
+ NULL, 0);
+ released_regs++;
+ }
+ if (!(calling_it_nexus))
+ core_scsi3_ua_allocate(pr_reg_nacl,
+ pr_res_mapped_lun, 0x2A,
+ ASCQ_2AH_RESERVATIONS_PREEMPTED);
+ }
+ spin_unlock(&pr_tmpl->registration_lock);
+ /*
+ * If a PERSISTENT RESERVE OUT with a PREEMPT service action or
+ * a PREEMPT AND ABORT service action sets the SERVICE ACTION
+ * RESERVATION KEY field to a value that does not match any
+ * registered reservation key, then the device server shall
+ * complete the command with RESERVATION CONFLICT status.
+ */
+ if (!(released_regs)) {
+ spin_unlock(&dev->dev_reservation_lock);
+ core_scsi3_put_pr_reg(pr_reg_n);
+ return PYX_TRANSPORT_RESERVATION_CONFLICT;
+ }
+ /*
+ * For an existing all registrants type reservation
+ * with a zero SA rservation key, preempt the existing
+ * reservation with the new PR type and scope.
+ */
+ if (pr_res_holder && all_reg && !(sa_res_key)) {
+ __core_scsi3_complete_pro_preempt(dev, pr_reg_n,
+ (abort) ? &preempt_and_abort_list : NULL,
+ type, scope, abort);
+
+ if (abort)
+ core_scsi3_release_preempt_and_abort(
+ &preempt_and_abort_list, pr_reg_n);
+ }
+ spin_unlock(&dev->dev_reservation_lock);
+
+ if (pr_tmpl->pr_aptpl_active) {
+ ret = core_scsi3_update_and_write_aptpl(SE_DEV(cmd),
+ &pr_reg_n->pr_aptpl_buf[0],
+ pr_tmpl->pr_aptpl_buf_len);
+ if (!(ret))
+ printk(KERN_INFO "SPC-3 PR: Updated APTPL"
+ " metadata for PREEMPT%s\n", (abort) ?
+ "_AND_ABORT" : "");
+ }
+
+ core_scsi3_put_pr_reg(pr_reg_n);
+ core_scsi3_pr_generation(SE_DEV(cmd));
+ return 0;
+ }
+ /*
+ * The PREEMPTing SA reservation key matches that of the
+ * existing persistent reservation, first, we check if
+ * we are preempting our own reservation.
+ * From spc4r17, section 5.7.11.4.3 Preempting
+ * persistent reservations and registration handling
+ *
+ * If an all registrants persistent reservation is not
+ * present, it is not an error for the persistent
+ * reservation holder to preempt itself (i.e., a
+ * PERSISTENT RESERVE OUT with a PREEMPT service action
+ * or a PREEMPT AND ABORT service action with the
+ * SERVICE ACTION RESERVATION KEY value equal to the
+ * persistent reservation holder's reservation key that
+ * is received from the persistent reservation holder).
+ * In that case, the device server shall establish the
+ * new persistent reservation and maintain the
+ * registration.
+ */
+ prh_type = pr_res_holder->pr_res_type;
+ prh_scope = pr_res_holder->pr_res_scope;
+ /*
+ * If the SERVICE ACTION RESERVATION KEY field identifies a
+ * persistent reservation holder (see 5.7.10), the device
+ * server shall perform a preempt by doing the following as
+ * an uninterrupted series of actions:
+ *
+ * a) Release the persistent reservation for the holder
+ * identified by the SERVICE ACTION RESERVATION KEY field;
+ */
+ if (pr_reg_n != pr_res_holder)
+ __core_scsi3_complete_pro_release(dev,
+ pr_res_holder->pr_reg_nacl,
+ dev->dev_pr_res_holder, 0);
+ /*
+ * b) Remove the registrations for all I_T nexuses identified
+ * by the SERVICE ACTION RESERVATION KEY field, except the
+ * I_T nexus that is being used for the PERSISTENT RESERVE
+ * OUT command. If an all registrants persistent reservation
+ * is present and the SERVICE ACTION RESERVATION KEY field
+ * is set to zero, then all registrations shall be removed
+ * except for that of the I_T nexus that is being used for
+ * the PERSISTENT RESERVE OUT command;
+ */
+ spin_lock(&pr_tmpl->registration_lock);
+ list_for_each_entry_safe(pr_reg, pr_reg_tmp,
+ &pr_tmpl->registration_list, pr_reg_list) {
+
+ calling_it_nexus = (pr_reg_n == pr_reg) ? 1 : 0;
+ if (calling_it_nexus)
+ continue;
+
+ if (pr_reg->pr_res_key != sa_res_key)
+ continue;
+
+ pr_reg_nacl = pr_reg->pr_reg_nacl;
+ pr_res_mapped_lun = pr_reg->pr_res_mapped_lun;
+ __core_scsi3_free_registration(dev, pr_reg,
+ (abort) ? &preempt_and_abort_list : NULL,
+ calling_it_nexus);
+ /*
+ * e) Establish a unit attention condition for the initiator
+ * port associated with every I_T nexus that lost its
+ * persistent reservation and/or registration, with the
+ * additional sense code set to REGISTRATIONS PREEMPTED;
+ */
+ core_scsi3_ua_allocate(pr_reg_nacl, pr_res_mapped_lun, 0x2A,
+ ASCQ_2AH_RESERVATIONS_PREEMPTED);
+ }
+ spin_unlock(&pr_tmpl->registration_lock);
+ /*
+ * c) Establish a persistent reservation for the preempting
+ * I_T nexus using the contents of the SCOPE and TYPE fields;
+ */
+ __core_scsi3_complete_pro_preempt(dev, pr_reg_n,
+ (abort) ? &preempt_and_abort_list : NULL,
+ type, scope, abort);
+ /*
+ * d) Process tasks as defined in 5.7.1;
+ * e) See above..
+ * f) If the type or scope has changed, then for every I_T nexus
+ * whose reservation key was not removed, except for the I_T
+ * nexus on which the PERSISTENT RESERVE OUT command was
+ * received, the device server shall establish a unit
+ * attention condition for the initiator port associated with
+ * that I_T nexus, with the additional sense code set to
+ * RESERVATIONS RELEASED. If the type or scope have not
+ * changed, then no unit attention condition(s) shall be
+ * established for this reason.
+ */
+ if ((prh_type != type) || (prh_scope != scope)) {
+ spin_lock(&pr_tmpl->registration_lock);
+ list_for_each_entry_safe(pr_reg, pr_reg_tmp,
+ &pr_tmpl->registration_list, pr_reg_list) {
+
+ calling_it_nexus = (pr_reg_n == pr_reg) ? 1 : 0;
+ if (calling_it_nexus)
+ continue;
+
+ core_scsi3_ua_allocate(pr_reg->pr_reg_nacl,
+ pr_reg->pr_res_mapped_lun, 0x2A,
+ ASCQ_2AH_RESERVATIONS_RELEASED);
+ }
+ spin_unlock(&pr_tmpl->registration_lock);
+ }
+ spin_unlock(&dev->dev_reservation_lock);
+ /*
+ * Call LUN_RESET logic upon list of struct t10_pr_registration,
+ * All received CDBs for the matching existing reservation and
+ * registrations undergo ABORT_TASK logic.
+ *
+ * From there, core_scsi3_release_preempt_and_abort() will
+ * release every registration in the list (which have already
+ * been removed from the primary pr_reg list), except the
+ * new persistent reservation holder, the calling Initiator Port.
+ */
+ if (abort) {
+ core_tmr_lun_reset(dev, NULL, &preempt_and_abort_list, cmd);
+ core_scsi3_release_preempt_and_abort(&preempt_and_abort_list,
+ pr_reg_n);
+ }
+
+ if (pr_tmpl->pr_aptpl_active) {
+ ret = core_scsi3_update_and_write_aptpl(SE_DEV(cmd),
+ &pr_reg_n->pr_aptpl_buf[0],
+ pr_tmpl->pr_aptpl_buf_len);
+ if (!(ret))
+ printk("SPC-3 PR: Updated APTPL metadata for PREEMPT"
+ "%s\n", (abort) ? "_AND_ABORT" : "");
+ }
+
+ core_scsi3_put_pr_reg(pr_reg_n);
+ core_scsi3_pr_generation(SE_DEV(cmd));
+ return 0;
+}
+
+static int core_scsi3_emulate_pro_preempt(
+ struct se_cmd *cmd,
+ int type,
+ int scope,
+ u64 res_key,
+ u64 sa_res_key,
+ int abort)
+{
+ int ret = 0;
+
+ switch (type) {
+ case PR_TYPE_WRITE_EXCLUSIVE:
+ case PR_TYPE_EXCLUSIVE_ACCESS:
+ case PR_TYPE_WRITE_EXCLUSIVE_REGONLY:
+ case PR_TYPE_EXCLUSIVE_ACCESS_REGONLY:
+ case PR_TYPE_WRITE_EXCLUSIVE_ALLREG:
+ case PR_TYPE_EXCLUSIVE_ACCESS_ALLREG:
+ ret = core_scsi3_pro_preempt(cmd, type, scope,
+ res_key, sa_res_key, abort);
+ break;
+ default:
+ printk(KERN_ERR "SPC-3 PR: Unknown Service Action PREEMPT%s"
+ " Type: 0x%02x\n", (abort) ? "_AND_ABORT" : "", type);
+ return PYX_TRANSPORT_INVALID_CDB_FIELD;
+ }
+
+ return ret;
+}
+
+
+static int core_scsi3_emulate_pro_register_and_move(
+ struct se_cmd *cmd,
+ u64 res_key,
+ u64 sa_res_key,
+ int aptpl,
+ int unreg)
+{
+ struct se_session *se_sess = SE_SESS(cmd);
+ struct se_device *dev = SE_DEV(cmd);
+ struct se_dev_entry *se_deve, *dest_se_deve = NULL;
+ struct se_lun *se_lun = SE_LUN(cmd);
+ struct se_node_acl *pr_res_nacl, *pr_reg_nacl, *dest_node_acl = NULL;
+ struct se_port *se_port;
+ struct se_portal_group *se_tpg, *dest_se_tpg = NULL;
+ struct target_core_fabric_ops *dest_tf_ops = NULL, *tf_ops;
+ struct t10_pr_registration *pr_reg, *pr_res_holder, *dest_pr_reg;
+ struct t10_reservation_template *pr_tmpl = &SU_DEV(dev)->t10_reservation;
+ unsigned char *buf = (unsigned char *)T_TASK(cmd)->t_task_buf;
+ unsigned char *initiator_str;
+ char *iport_ptr = NULL, dest_iport[64], i_buf[PR_REG_ISID_ID_LEN];
+ u32 tid_len, tmp_tid_len;
+ int new_reg = 0, type, scope, ret, matching_iname, prf_isid;
+ unsigned short rtpi;
+ unsigned char proto_ident;
+
+ if (!(se_sess) || !(se_lun)) {
+ printk(KERN_ERR "SPC-3 PR: se_sess || struct se_lun is NULL!\n");
+ return PYX_TRANSPORT_LU_COMM_FAILURE;
+ }
+ memset(dest_iport, 0, 64);
+ memset(i_buf, 0, PR_REG_ISID_ID_LEN);
+ se_tpg = se_sess->se_tpg;
+ tf_ops = TPG_TFO(se_tpg);
+ se_deve = &se_sess->se_node_acl->device_list[cmd->orig_fe_lun];
+ /*
+ * Follow logic from spc4r17 Section 5.7.8, Table 50 --
+ * Register behaviors for a REGISTER AND MOVE service action
+ *
+ * Locate the existing *pr_reg via struct se_node_acl pointers
+ */
+ pr_reg = core_scsi3_locate_pr_reg(SE_DEV(cmd), se_sess->se_node_acl,
+ se_sess);
+ if (!(pr_reg)) {
+ printk(KERN_ERR "SPC-3 PR: Unable to locate PR_REGISTERED"
+ " *pr_reg for REGISTER_AND_MOVE\n");
+ return PYX_TRANSPORT_LU_COMM_FAILURE;
+ }
+ /*
+ * The provided reservation key much match the existing reservation key
+ * provided during this initiator's I_T nexus registration.
+ */
+ if (res_key != pr_reg->pr_res_key) {
+ printk(KERN_WARNING "SPC-3 PR REGISTER_AND_MOVE: Received"
+ " res_key: 0x%016Lx does not match existing SA REGISTER"
+ " res_key: 0x%016Lx\n", res_key, pr_reg->pr_res_key);
+ core_scsi3_put_pr_reg(pr_reg);
+ return PYX_TRANSPORT_RESERVATION_CONFLICT;
+ }
+ /*
+ * The service active reservation key needs to be non zero
+ */
+ if (!(sa_res_key)) {
+ printk(KERN_WARNING "SPC-3 PR REGISTER_AND_MOVE: Received zero"
+ " sa_res_key\n");
+ core_scsi3_put_pr_reg(pr_reg);
+ return PYX_TRANSPORT_INVALID_PARAMETER_LIST;
+ }
+ /*
+ * Determine the Relative Target Port Identifier where the reservation
+ * will be moved to for the TransportID containing SCSI initiator WWN
+ * information.
+ */
+ rtpi = (buf[18] & 0xff) << 8;
+ rtpi |= buf[19] & 0xff;
+ tid_len = (buf[20] & 0xff) << 24;
+ tid_len |= (buf[21] & 0xff) << 16;
+ tid_len |= (buf[22] & 0xff) << 8;
+ tid_len |= buf[23] & 0xff;
+
+ if ((tid_len + 24) != cmd->data_length) {
+ printk(KERN_ERR "SPC-3 PR: Illegal tid_len: %u + 24 byte header"
+ " does not equal CDB data_length: %u\n", tid_len,
+ cmd->data_length);
+ core_scsi3_put_pr_reg(pr_reg);
+ return PYX_TRANSPORT_INVALID_PARAMETER_LIST;
+ }
+
+ spin_lock(&dev->se_port_lock);
+ list_for_each_entry(se_port, &dev->dev_sep_list, sep_list) {
+ if (se_port->sep_rtpi != rtpi)
+ continue;
+ dest_se_tpg = se_port->sep_tpg;
+ if (!(dest_se_tpg))
+ continue;
+ dest_tf_ops = TPG_TFO(dest_se_tpg);
+ if (!(dest_tf_ops))
+ continue;
+
+ atomic_inc(&dest_se_tpg->tpg_pr_ref_count);
+ smp_mb__after_atomic_inc();
+ spin_unlock(&dev->se_port_lock);
+
+ ret = core_scsi3_tpg_depend_item(dest_se_tpg);
+ if (ret != 0) {
+ printk(KERN_ERR "core_scsi3_tpg_depend_item() failed"
+ " for dest_se_tpg\n");
+ atomic_dec(&dest_se_tpg->tpg_pr_ref_count);
+ smp_mb__after_atomic_dec();
+ core_scsi3_put_pr_reg(pr_reg);
+ return PYX_TRANSPORT_LU_COMM_FAILURE;
+ }
+
+ spin_lock(&dev->se_port_lock);
+ break;
+ }
+ spin_unlock(&dev->se_port_lock);
+
+ if (!(dest_se_tpg) || (!dest_tf_ops)) {
+ printk(KERN_ERR "SPC-3 PR REGISTER_AND_MOVE: Unable to locate"
+ " fabric ops from Relative Target Port Identifier:"
+ " %hu\n", rtpi);
+ core_scsi3_put_pr_reg(pr_reg);
+ return PYX_TRANSPORT_INVALID_PARAMETER_LIST;
+ }
+ proto_ident = (buf[24] & 0x0f);
+#if 0
+ printk("SPC-3 PR REGISTER_AND_MOVE: Extracted Protocol Identifier:"
+ " 0x%02x\n", proto_ident);
+#endif
+ if (proto_ident != dest_tf_ops->get_fabric_proto_ident(dest_se_tpg)) {
+ printk(KERN_ERR "SPC-3 PR REGISTER_AND_MOVE: Received"
+ " proto_ident: 0x%02x does not match ident: 0x%02x"
+ " from fabric: %s\n", proto_ident,
+ dest_tf_ops->get_fabric_proto_ident(dest_se_tpg),
+ dest_tf_ops->get_fabric_name());
+ ret = PYX_TRANSPORT_INVALID_PARAMETER_LIST;
+ goto out;
+ }
+ if (dest_tf_ops->tpg_parse_pr_out_transport_id == NULL) {
+ printk(KERN_ERR "SPC-3 PR REGISTER_AND_MOVE: Fabric does not"
+ " containg a valid tpg_parse_pr_out_transport_id"
+ " function pointer\n");
+ ret = PYX_TRANSPORT_LU_COMM_FAILURE;
+ goto out;
+ }
+ initiator_str = dest_tf_ops->tpg_parse_pr_out_transport_id(dest_se_tpg,
+ (const char *)&buf[24], &tmp_tid_len, &iport_ptr);
+ if (!(initiator_str)) {
+ printk(KERN_ERR "SPC-3 PR REGISTER_AND_MOVE: Unable to locate"
+ " initiator_str from Transport ID\n");
+ ret = PYX_TRANSPORT_INVALID_PARAMETER_LIST;
+ goto out;
+ }
+
+ printk(KERN_INFO "SPC-3 PR [%s] Extracted initiator %s identifier: %s"
+ " %s\n", dest_tf_ops->get_fabric_name(), (iport_ptr != NULL) ?
+ "port" : "device", initiator_str, (iport_ptr != NULL) ?
+ iport_ptr : "");
+ /*
+ * If a PERSISTENT RESERVE OUT command with a REGISTER AND MOVE service
+ * action specifies a TransportID that is the same as the initiator port
+ * of the I_T nexus for the command received, then the command shall
+ * be terminated with CHECK CONDITION status, with the sense key set to
+ * ILLEGAL REQUEST, and the additional sense code set to INVALID FIELD
+ * IN PARAMETER LIST.
+ */
+ pr_reg_nacl = pr_reg->pr_reg_nacl;
+ matching_iname = (!strcmp(initiator_str,
+ pr_reg_nacl->initiatorname)) ? 1 : 0;
+ if (!(matching_iname))
+ goto after_iport_check;
+
+ if (!(iport_ptr) || !(pr_reg->isid_present_at_reg)) {
+ printk(KERN_ERR "SPC-3 PR REGISTER_AND_MOVE: TransportID: %s"
+ " matches: %s on received I_T Nexus\n", initiator_str,
+ pr_reg_nacl->initiatorname);
+ ret = PYX_TRANSPORT_INVALID_PARAMETER_LIST;
+ goto out;
+ }
+ if (!(strcmp(iport_ptr, pr_reg->pr_reg_isid))) {
+ printk(KERN_ERR "SPC-3 PR REGISTER_AND_MOVE: TransportID: %s %s"
+ " matches: %s %s on received I_T Nexus\n",
+ initiator_str, iport_ptr, pr_reg_nacl->initiatorname,
+ pr_reg->pr_reg_isid);
+ ret = PYX_TRANSPORT_INVALID_PARAMETER_LIST;
+ goto out;
+ }
+after_iport_check:
+ /*
+ * Locate the destination struct se_node_acl from the received Transport ID
+ */
+ spin_lock_bh(&dest_se_tpg->acl_node_lock);
+ dest_node_acl = __core_tpg_get_initiator_node_acl(dest_se_tpg,
+ initiator_str);
+ if (dest_node_acl) {
+ atomic_inc(&dest_node_acl->acl_pr_ref_count);
+ smp_mb__after_atomic_inc();
+ }
+ spin_unlock_bh(&dest_se_tpg->acl_node_lock);
+
+ if (!(dest_node_acl)) {
+ printk(KERN_ERR "Unable to locate %s dest_node_acl for"
+ " TransportID%s\n", dest_tf_ops->get_fabric_name(),
+ initiator_str);
+ ret = PYX_TRANSPORT_INVALID_PARAMETER_LIST;
+ goto out;
+ }
+ ret = core_scsi3_nodeacl_depend_item(dest_node_acl);
+ if (ret != 0) {
+ printk(KERN_ERR "core_scsi3_nodeacl_depend_item() for"
+ " dest_node_acl\n");
+ atomic_dec(&dest_node_acl->acl_pr_ref_count);
+ smp_mb__after_atomic_dec();
+ dest_node_acl = NULL;
+ ret = PYX_TRANSPORT_LU_COMM_FAILURE;
+ goto out;
+ }
+#if 0
+ printk(KERN_INFO "SPC-3 PR REGISTER_AND_MOVE: Found %s dest_node_acl:"
+ " %s from TransportID\n", dest_tf_ops->get_fabric_name(),
+ dest_node_acl->initiatorname);
+#endif
+ /*
+ * Locate the struct se_dev_entry pointer for the matching RELATIVE TARGET
+ * PORT IDENTIFIER.
+ */
+ dest_se_deve = core_get_se_deve_from_rtpi(dest_node_acl, rtpi);
+ if (!(dest_se_deve)) {
+ printk(KERN_ERR "Unable to locate %s dest_se_deve from RTPI:"
+ " %hu\n", dest_tf_ops->get_fabric_name(), rtpi);
+ ret = PYX_TRANSPORT_INVALID_PARAMETER_LIST;
+ goto out;
+ }
+
+ ret = core_scsi3_lunacl_depend_item(dest_se_deve);
+ if (ret < 0) {
+ printk(KERN_ERR "core_scsi3_lunacl_depend_item() failed\n");
+ atomic_dec(&dest_se_deve->pr_ref_count);
+ smp_mb__after_atomic_dec();
+ dest_se_deve = NULL;
+ ret = PYX_TRANSPORT_LU_COMM_FAILURE;
+ goto out;
+ }
+#if 0
+ printk(KERN_INFO "SPC-3 PR REGISTER_AND_MOVE: Located %s node %s LUN"
+ " ACL for dest_se_deve->mapped_lun: %u\n",
+ dest_tf_ops->get_fabric_name(), dest_node_acl->initiatorname,
+ dest_se_deve->mapped_lun);
+#endif
+ /*
+ * A persistent reservation needs to already existing in order to
+ * successfully complete the REGISTER_AND_MOVE service action..
+ */
+ spin_lock(&dev->dev_reservation_lock);
+ pr_res_holder = dev->dev_pr_res_holder;
+ if (!(pr_res_holder)) {
+ printk(KERN_WARNING "SPC-3 PR REGISTER_AND_MOVE: No reservation"
+ " currently held\n");
+ spin_unlock(&dev->dev_reservation_lock);
+ ret = PYX_TRANSPORT_INVALID_CDB_FIELD;
+ goto out;
+ }
+ /*
+ * The received on I_T Nexus must be the reservation holder.
+ *
+ * From spc4r17 section 5.7.8 Table 50 --
+ * Register behaviors for a REGISTER AND MOVE service action
+ */
+ if (pr_res_holder != pr_reg) {
+ printk(KERN_WARNING "SPC-3 PR REGISTER_AND_MOVE: Calling I_T"
+ " Nexus is not reservation holder\n");
+ spin_unlock(&dev->dev_reservation_lock);
+ ret = PYX_TRANSPORT_RESERVATION_CONFLICT;
+ goto out;
+ }
+ /*
+ * From spc4r17 section 5.7.8: registering and moving reservation
+ *
+ * If a PERSISTENT RESERVE OUT command with a REGISTER AND MOVE service
+ * action is received and the established persistent reservation is a
+ * Write Exclusive - All Registrants type or Exclusive Access -
+ * All Registrants type reservation, then the command shall be completed
+ * with RESERVATION CONFLICT status.
+ */
+ if ((pr_res_holder->pr_res_type == PR_TYPE_WRITE_EXCLUSIVE_ALLREG) ||
+ (pr_res_holder->pr_res_type == PR_TYPE_EXCLUSIVE_ACCESS_ALLREG)) {
+ printk(KERN_WARNING "SPC-3 PR REGISTER_AND_MOVE: Unable to move"
+ " reservation for type: %s\n",
+ core_scsi3_pr_dump_type(pr_res_holder->pr_res_type));
+ spin_unlock(&dev->dev_reservation_lock);
+ ret = PYX_TRANSPORT_RESERVATION_CONFLICT;
+ goto out;
+ }
+ pr_res_nacl = pr_res_holder->pr_reg_nacl;
+ /*
+ * b) Ignore the contents of the (received) SCOPE and TYPE fields;
+ */
+ type = pr_res_holder->pr_res_type;
+ scope = pr_res_holder->pr_res_type;
+ /*
+ * c) Associate the reservation key specified in the SERVICE ACTION
+ * RESERVATION KEY field with the I_T nexus specified as the
+ * destination of the register and move, where:
+ * A) The I_T nexus is specified by the TransportID and the
+ * RELATIVE TARGET PORT IDENTIFIER field (see 6.14.4); and
+ * B) Regardless of the TransportID format used, the association for
+ * the initiator port is based on either the initiator port name
+ * (see 3.1.71) on SCSI transport protocols where port names are
+ * required or the initiator port identifier (see 3.1.70) on SCSI
+ * transport protocols where port names are not required;
+ * d) Register the reservation key specified in the SERVICE ACTION
+ * RESERVATION KEY field;
+ * e) Retain the reservation key specified in the SERVICE ACTION
+ * RESERVATION KEY field and associated information;
+ *
+ * Also, It is not an error for a REGISTER AND MOVE service action to
+ * register an I_T nexus that is already registered with the same
+ * reservation key or a different reservation key.
+ */
+ dest_pr_reg = __core_scsi3_locate_pr_reg(dev, dest_node_acl,
+ iport_ptr);
+ if (!(dest_pr_reg)) {
+ ret = core_scsi3_alloc_registration(SE_DEV(cmd),
+ dest_node_acl, dest_se_deve, iport_ptr,
+ sa_res_key, 0, aptpl, 2, 1);
+ if (ret != 0) {
+ spin_unlock(&dev->dev_reservation_lock);
+ ret = PYX_TRANSPORT_INVALID_PARAMETER_LIST;
+ goto out;
+ }
+ dest_pr_reg = __core_scsi3_locate_pr_reg(dev, dest_node_acl,
+ iport_ptr);
+ new_reg = 1;
+ }
+ /*
+ * f) Release the persistent reservation for the persistent reservation
+ * holder (i.e., the I_T nexus on which the
+ */
+ __core_scsi3_complete_pro_release(dev, pr_res_nacl,
+ dev->dev_pr_res_holder, 0);
+ /*
+ * g) Move the persistent reservation to the specified I_T nexus using
+ * the same scope and type as the persistent reservation released in
+ * item f); and
+ */
+ dev->dev_pr_res_holder = dest_pr_reg;
+ dest_pr_reg->pr_res_holder = 1;
+ dest_pr_reg->pr_res_type = type;
+ pr_reg->pr_res_scope = scope;
+ prf_isid = core_pr_dump_initiator_port(pr_reg, &i_buf[0],
+ PR_REG_ISID_ID_LEN);
+ /*
+ * Increment PRGeneration for existing registrations..
+ */
+ if (!(new_reg))
+ dest_pr_reg->pr_res_generation = pr_tmpl->pr_generation++;
+ spin_unlock(&dev->dev_reservation_lock);
+
+ printk(KERN_INFO "SPC-3 PR [%s] Service Action: REGISTER_AND_MOVE"
+ " created new reservation holder TYPE: %s on object RTPI:"
+ " %hu PRGeneration: 0x%08x\n", dest_tf_ops->get_fabric_name(),
+ core_scsi3_pr_dump_type(type), rtpi,
+ dest_pr_reg->pr_res_generation);
+ printk(KERN_INFO "SPC-3 PR Successfully moved reservation from"
+ " %s Fabric Node: %s%s -> %s Fabric Node: %s %s\n",
+ tf_ops->get_fabric_name(), pr_reg_nacl->initiatorname,
+ (prf_isid) ? &i_buf[0] : "", dest_tf_ops->get_fabric_name(),
+ dest_node_acl->initiatorname, (iport_ptr != NULL) ?
+ iport_ptr : "");
+ /*
+ * It is now safe to release configfs group dependencies for destination
+ * of Transport ID Initiator Device/Port Identifier
+ */
+ core_scsi3_lunacl_undepend_item(dest_se_deve);
+ core_scsi3_nodeacl_undepend_item(dest_node_acl);
+ core_scsi3_tpg_undepend_item(dest_se_tpg);
+ /*
+ * h) If the UNREG bit is set to one, unregister (see 5.7.11.3) the I_T
+ * nexus on which PERSISTENT RESERVE OUT command was received.
+ */
+ if (unreg) {
+ spin_lock(&pr_tmpl->registration_lock);
+ __core_scsi3_free_registration(dev, pr_reg, NULL, 1);
+ spin_unlock(&pr_tmpl->registration_lock);
+ } else
+ core_scsi3_put_pr_reg(pr_reg);
+
+ /*
+ * Clear the APTPL metadata if APTPL has been disabled, otherwise
+ * write out the updated metadata to struct file for this SCSI device.
+ */
+ if (!(aptpl)) {
+ pr_tmpl->pr_aptpl_active = 0;
+ core_scsi3_update_and_write_aptpl(SE_DEV(cmd), NULL, 0);
+ printk("SPC-3 PR: Set APTPL Bit Deactivated for"
+ " REGISTER_AND_MOVE\n");
+ } else {
+ pr_tmpl->pr_aptpl_active = 1;
+ ret = core_scsi3_update_and_write_aptpl(SE_DEV(cmd),
+ &dest_pr_reg->pr_aptpl_buf[0],
+ pr_tmpl->pr_aptpl_buf_len);
+ if (!(ret))
+ printk("SPC-3 PR: Set APTPL Bit Activated for"
+ " REGISTER_AND_MOVE\n");
+ }
+
+ core_scsi3_put_pr_reg(dest_pr_reg);
+ return 0;
+out:
+ if (dest_se_deve)
+ core_scsi3_lunacl_undepend_item(dest_se_deve);
+ if (dest_node_acl)
+ core_scsi3_nodeacl_undepend_item(dest_node_acl);
+ core_scsi3_tpg_undepend_item(dest_se_tpg);
+ core_scsi3_put_pr_reg(pr_reg);
+ return ret;
+}
+
+static unsigned long long core_scsi3_extract_reservation_key(unsigned char *cdb)
+{
+ unsigned int __v1, __v2;
+
+ __v1 = (cdb[0] << 24) | (cdb[1] << 16) | (cdb[2] << 8) | cdb[3];
+ __v2 = (cdb[4] << 24) | (cdb[5] << 16) | (cdb[6] << 8) | cdb[7];
+
+ return ((unsigned long long)__v2) | (unsigned long long)__v1 << 32;
+}
+
+/*
+ * See spc4r17 section 6.14 Table 170
+ */
+static int core_scsi3_emulate_pr_out(struct se_cmd *cmd, unsigned char *cdb)
+{
+ unsigned char *buf = (unsigned char *)T_TASK(cmd)->t_task_buf;
+ u64 res_key, sa_res_key;
+ int sa, scope, type, aptpl;
+ int spec_i_pt = 0, all_tg_pt = 0, unreg = 0;
+ /*
+ * FIXME: A NULL struct se_session pointer means an this is not coming from
+ * a $FABRIC_MOD's nexus, but from internal passthrough ops.
+ */
+ if (!(SE_SESS(cmd)))
+ return PYX_TRANSPORT_LU_COMM_FAILURE;
+
+ if (cmd->data_length < 24) {
+ printk(KERN_WARNING "SPC-PR: Recieved PR OUT parameter list"
+ " length too small: %u\n", cmd->data_length);
+ return PYX_TRANSPORT_INVALID_PARAMETER_LIST;
+ }
+ /*
+ * From the PERSISTENT_RESERVE_OUT command descriptor block (CDB)
+ */
+ sa = (cdb[1] & 0x1f);
+ scope = (cdb[2] & 0xf0);
+ type = (cdb[2] & 0x0f);
+ /*
+ * From PERSISTENT_RESERVE_OUT parameter list (payload)
+ */
+ res_key = core_scsi3_extract_reservation_key(&buf[0]);
+ sa_res_key = core_scsi3_extract_reservation_key(&buf[8]);
+ /*
+ * REGISTER_AND_MOVE uses a different SA parameter list containing
+ * SCSI TransportIDs.
+ */
+ if (sa != PRO_REGISTER_AND_MOVE) {
+ spec_i_pt = (buf[20] & 0x08);
+ all_tg_pt = (buf[20] & 0x04);
+ aptpl = (buf[20] & 0x01);
+ } else {
+ aptpl = (buf[17] & 0x01);
+ unreg = (buf[17] & 0x02);
+ }
+ /*
+ * SPEC_I_PT=1 is only valid for Service action: REGISTER
+ */
+ if (spec_i_pt && ((cdb[1] & 0x1f) != PRO_REGISTER))
+ return PYX_TRANSPORT_INVALID_PARAMETER_LIST;
+ /*
+ * From spc4r17 section 6.14:
+ *
+ * If the SPEC_I_PT bit is set to zero, the service action is not
+ * REGISTER AND MOVE, and the parameter list length is not 24, then
+ * the command shall be terminated with CHECK CONDITION status, with
+ * the sense key set to ILLEGAL REQUEST, and the additional sense
+ * code set to PARAMETER LIST LENGTH ERROR.
+ */
+ if (!(spec_i_pt) && ((cdb[1] & 0x1f) != PRO_REGISTER_AND_MOVE) &&
+ (cmd->data_length != 24)) {
+ printk(KERN_WARNING "SPC-PR: Recieved PR OUT illegal parameter"
+ " list length: %u\n", cmd->data_length);
+ return PYX_TRANSPORT_INVALID_PARAMETER_LIST;
+ }
+ /*
+ * (core_scsi3_emulate_pro_* function parameters
+ * are defined by spc4r17 Table 174:
+ * PERSISTENT_RESERVE_OUT service actions and valid parameters.
+ */
+ switch (sa) {
+ case PRO_REGISTER:
+ return core_scsi3_emulate_pro_register(cmd,
+ res_key, sa_res_key, aptpl, all_tg_pt, spec_i_pt, 0);
+ case PRO_RESERVE:
+ return core_scsi3_emulate_pro_reserve(cmd,
+ type, scope, res_key);
+ case PRO_RELEASE:
+ return core_scsi3_emulate_pro_release(cmd,
+ type, scope, res_key);
+ case PRO_CLEAR:
+ return core_scsi3_emulate_pro_clear(cmd, res_key);
+ case PRO_PREEMPT:
+ return core_scsi3_emulate_pro_preempt(cmd, type, scope,
+ res_key, sa_res_key, 0);
+ case PRO_PREEMPT_AND_ABORT:
+ return core_scsi3_emulate_pro_preempt(cmd, type, scope,
+ res_key, sa_res_key, 1);
+ case PRO_REGISTER_AND_IGNORE_EXISTING_KEY:
+ return core_scsi3_emulate_pro_register(cmd,
+ 0, sa_res_key, aptpl, all_tg_pt, spec_i_pt, 1);
+ case PRO_REGISTER_AND_MOVE:
+ return core_scsi3_emulate_pro_register_and_move(cmd, res_key,
+ sa_res_key, aptpl, unreg);
+ default:
+ printk(KERN_ERR "Unknown PERSISTENT_RESERVE_OUT service"
+ " action: 0x%02x\n", cdb[1] & 0x1f);
+ return PYX_TRANSPORT_INVALID_CDB_FIELD;
+ }
+
+ return PYX_TRANSPORT_INVALID_CDB_FIELD;
+}
+
+/*
+ * PERSISTENT_RESERVE_IN Service Action READ_KEYS
+ *
+ * See spc4r17 section 5.7.6.2 and section 6.13.2, Table 160
+ */
+static int core_scsi3_pri_read_keys(struct se_cmd *cmd)
+{
+ struct se_device *se_dev = SE_DEV(cmd);
+ struct se_subsystem_dev *su_dev = SU_DEV(se_dev);
+ struct t10_pr_registration *pr_reg;
+ unsigned char *buf = (unsigned char *)T_TASK(cmd)->t_task_buf;
+ u32 add_len = 0, off = 8;
+
+ if (cmd->data_length < 8) {
+ printk(KERN_ERR "PRIN SA READ_KEYS SCSI Data Length: %u"
+ " too small\n", cmd->data_length);
+ return PYX_TRANSPORT_INVALID_CDB_FIELD;
+ }
+
+ buf[0] = ((T10_RES(su_dev)->pr_generation >> 24) & 0xff);
+ buf[1] = ((T10_RES(su_dev)->pr_generation >> 16) & 0xff);
+ buf[2] = ((T10_RES(su_dev)->pr_generation >> 8) & 0xff);
+ buf[3] = (T10_RES(su_dev)->pr_generation & 0xff);
+
+ spin_lock(&T10_RES(su_dev)->registration_lock);
+ list_for_each_entry(pr_reg, &T10_RES(su_dev)->registration_list,
+ pr_reg_list) {
+ /*
+ * Check for overflow of 8byte PRI READ_KEYS payload and
+ * next reservation key list descriptor.
+ */
+ if ((add_len + 8) > (cmd->data_length - 8))
+ break;
+
+ buf[off++] = ((pr_reg->pr_res_key >> 56) & 0xff);
+ buf[off++] = ((pr_reg->pr_res_key >> 48) & 0xff);
+ buf[off++] = ((pr_reg->pr_res_key >> 40) & 0xff);
+ buf[off++] = ((pr_reg->pr_res_key >> 32) & 0xff);
+ buf[off++] = ((pr_reg->pr_res_key >> 24) & 0xff);
+ buf[off++] = ((pr_reg->pr_res_key >> 16) & 0xff);
+ buf[off++] = ((pr_reg->pr_res_key >> 8) & 0xff);
+ buf[off++] = (pr_reg->pr_res_key & 0xff);
+
+ add_len += 8;
+ }
+ spin_unlock(&T10_RES(su_dev)->registration_lock);
+
+ buf[4] = ((add_len >> 24) & 0xff);
+ buf[5] = ((add_len >> 16) & 0xff);
+ buf[6] = ((add_len >> 8) & 0xff);
+ buf[7] = (add_len & 0xff);
+
+ return 0;
+}
+
+/*
+ * PERSISTENT_RESERVE_IN Service Action READ_RESERVATION
+ *
+ * See spc4r17 section 5.7.6.3 and section 6.13.3.2 Table 161 and 162
+ */
+static int core_scsi3_pri_read_reservation(struct se_cmd *cmd)
+{
+ struct se_device *se_dev = SE_DEV(cmd);
+ struct se_subsystem_dev *su_dev = SU_DEV(se_dev);
+ struct t10_pr_registration *pr_reg;
+ unsigned char *buf = (unsigned char *)T_TASK(cmd)->t_task_buf;
+ u64 pr_res_key;
+ u32 add_len = 16; /* Hardcoded to 16 when a reservation is held. */
+
+ if (cmd->data_length < 8) {
+ printk(KERN_ERR "PRIN SA READ_RESERVATIONS SCSI Data Length: %u"
+ " too small\n", cmd->data_length);
+ return PYX_TRANSPORT_INVALID_CDB_FIELD;
+ }
+
+ buf[0] = ((T10_RES(su_dev)->pr_generation >> 24) & 0xff);
+ buf[1] = ((T10_RES(su_dev)->pr_generation >> 16) & 0xff);
+ buf[2] = ((T10_RES(su_dev)->pr_generation >> 8) & 0xff);
+ buf[3] = (T10_RES(su_dev)->pr_generation & 0xff);
+
+ spin_lock(&se_dev->dev_reservation_lock);
+ pr_reg = se_dev->dev_pr_res_holder;
+ if ((pr_reg)) {
+ /*
+ * Set the hardcoded Additional Length
+ */
+ buf[4] = ((add_len >> 24) & 0xff);
+ buf[5] = ((add_len >> 16) & 0xff);
+ buf[6] = ((add_len >> 8) & 0xff);
+ buf[7] = (add_len & 0xff);
+
+ if (cmd->data_length < 22) {
+ spin_unlock(&se_dev->dev_reservation_lock);
+ return 0;
+ }
+ /*
+ * Set the Reservation key.
+ *
+ * From spc4r17, section 5.7.10:
+ * A persistent reservation holder has its reservation key
+ * returned in the parameter data from a PERSISTENT
+ * RESERVE IN command with READ RESERVATION service action as
+ * follows:
+ * a) For a persistent reservation of the type Write Exclusive
+ * - All Registrants or Exclusive Access  All Regitrants,
+ * the reservation key shall be set to zero; or
+ * b) For all other persistent reservation types, the
+ * reservation key shall be set to the registered
+ * reservation key for the I_T nexus that holds the
+ * persistent reservation.
+ */
+ if ((pr_reg->pr_res_type == PR_TYPE_WRITE_EXCLUSIVE_ALLREG) ||
+ (pr_reg->pr_res_type == PR_TYPE_EXCLUSIVE_ACCESS_ALLREG))
+ pr_res_key = 0;
+ else
+ pr_res_key = pr_reg->pr_res_key;
+
+ buf[8] = ((pr_res_key >> 56) & 0xff);
+ buf[9] = ((pr_res_key >> 48) & 0xff);
+ buf[10] = ((pr_res_key >> 40) & 0xff);
+ buf[11] = ((pr_res_key >> 32) & 0xff);
+ buf[12] = ((pr_res_key >> 24) & 0xff);
+ buf[13] = ((pr_res_key >> 16) & 0xff);
+ buf[14] = ((pr_res_key >> 8) & 0xff);
+ buf[15] = (pr_res_key & 0xff);
+ /*
+ * Set the SCOPE and TYPE
+ */
+ buf[21] = (pr_reg->pr_res_scope & 0xf0) |
+ (pr_reg->pr_res_type & 0x0f);
+ }
+ spin_unlock(&se_dev->dev_reservation_lock);
+
+ return 0;
+}
+
+/*
+ * PERSISTENT_RESERVE_IN Service Action REPORT_CAPABILITIES
+ *
+ * See spc4r17 section 6.13.4 Table 165
+ */
+static int core_scsi3_pri_report_capabilities(struct se_cmd *cmd)
+{
+ struct se_device *dev = SE_DEV(cmd);
+ struct t10_reservation_template *pr_tmpl = &SU_DEV(dev)->t10_reservation;
+ unsigned char *buf = (unsigned char *)T_TASK(cmd)->t_task_buf;
+ u16 add_len = 8; /* Hardcoded to 8. */
+
+ if (cmd->data_length < 6) {
+ printk(KERN_ERR "PRIN SA REPORT_CAPABILITIES SCSI Data Length:"
+ " %u too small\n", cmd->data_length);
+ return PYX_TRANSPORT_INVALID_CDB_FIELD;
+ }
+
+ buf[0] = ((add_len << 8) & 0xff);
+ buf[1] = (add_len & 0xff);
+ buf[2] |= 0x10; /* CRH: Compatible Reservation Hanlding bit. */
+ buf[2] |= 0x08; /* SIP_C: Specify Initiator Ports Capable bit */
+ buf[2] |= 0x04; /* ATP_C: All Target Ports Capable bit */
+ buf[2] |= 0x01; /* PTPL_C: Persistence across Target Power Loss bit */
+ /*
+ * We are filling in the PERSISTENT RESERVATION TYPE MASK below, so
+ * set the TMV: Task Mask Valid bit.
+ */
+ buf[3] |= 0x80;
+ /*
+ * Change ALLOW COMMANDs to 0x20 or 0x40 later from Table 166
+ */
+ buf[3] |= 0x10; /* ALLOW COMMANDs field 001b */
+ /*
+ * PTPL_A: Persistence across Target Power Loss Active bit
+ */
+ if (pr_tmpl->pr_aptpl_active)
+ buf[3] |= 0x01;
+ /*
+ * Setup the PERSISTENT RESERVATION TYPE MASK from Table 167
+ */
+ buf[4] |= 0x80; /* PR_TYPE_EXCLUSIVE_ACCESS_ALLREG */
+ buf[4] |= 0x40; /* PR_TYPE_EXCLUSIVE_ACCESS_REGONLY */
+ buf[4] |= 0x20; /* PR_TYPE_WRITE_EXCLUSIVE_REGONLY */
+ buf[4] |= 0x08; /* PR_TYPE_EXCLUSIVE_ACCESS */
+ buf[4] |= 0x02; /* PR_TYPE_WRITE_EXCLUSIVE */
+ buf[5] |= 0x01; /* PR_TYPE_EXCLUSIVE_ACCESS_ALLREG */
+
+ return 0;
+}
+
+/*
+ * PERSISTENT_RESERVE_IN Service Action READ_FULL_STATUS
+ *
+ * See spc4r17 section 6.13.5 Table 168 and 169
+ */
+static int core_scsi3_pri_read_full_status(struct se_cmd *cmd)
+{
+ struct se_device *se_dev = SE_DEV(cmd);
+ struct se_node_acl *se_nacl;
+ struct se_subsystem_dev *su_dev = SU_DEV(se_dev);
+ struct se_portal_group *se_tpg;
+ struct t10_pr_registration *pr_reg, *pr_reg_tmp;
+ struct t10_reservation_template *pr_tmpl = &SU_DEV(se_dev)->t10_reservation;
+ unsigned char *buf = (unsigned char *)T_TASK(cmd)->t_task_buf;
+ u32 add_desc_len = 0, add_len = 0, desc_len, exp_desc_len;
+ u32 off = 8; /* off into first Full Status descriptor */
+ int format_code = 0;
+
+ if (cmd->data_length < 8) {
+ printk(KERN_ERR "PRIN SA READ_FULL_STATUS SCSI Data Length: %u"
+ " too small\n", cmd->data_length);
+ return PYX_TRANSPORT_INVALID_CDB_FIELD;
+ }
+
+ buf[0] = ((T10_RES(su_dev)->pr_generation >> 24) & 0xff);
+ buf[1] = ((T10_RES(su_dev)->pr_generation >> 16) & 0xff);
+ buf[2] = ((T10_RES(su_dev)->pr_generation >> 8) & 0xff);
+ buf[3] = (T10_RES(su_dev)->pr_generation & 0xff);
+
+ spin_lock(&pr_tmpl->registration_lock);
+ list_for_each_entry_safe(pr_reg, pr_reg_tmp,
+ &pr_tmpl->registration_list, pr_reg_list) {
+
+ se_nacl = pr_reg->pr_reg_nacl;
+ se_tpg = pr_reg->pr_reg_nacl->se_tpg;
+ add_desc_len = 0;
+
+ atomic_inc(&pr_reg->pr_res_holders);
+ smp_mb__after_atomic_inc();
+ spin_unlock(&pr_tmpl->registration_lock);
+ /*
+ * Determine expected length of $FABRIC_MOD specific
+ * TransportID full status descriptor..
+ */
+ exp_desc_len = TPG_TFO(se_tpg)->tpg_get_pr_transport_id_len(
+ se_tpg, se_nacl, pr_reg, &format_code);
+
+ if ((exp_desc_len + add_len) > cmd->data_length) {
+ printk(KERN_WARNING "SPC-3 PRIN READ_FULL_STATUS ran"
+ " out of buffer: %d\n", cmd->data_length);
+ spin_lock(&pr_tmpl->registration_lock);
+ atomic_dec(&pr_reg->pr_res_holders);
+ smp_mb__after_atomic_dec();
+ break;
+ }
+ /*
+ * Set RESERVATION KEY
+ */
+ buf[off++] = ((pr_reg->pr_res_key >> 56) & 0xff);
+ buf[off++] = ((pr_reg->pr_res_key >> 48) & 0xff);
+ buf[off++] = ((pr_reg->pr_res_key >> 40) & 0xff);
+ buf[off++] = ((pr_reg->pr_res_key >> 32) & 0xff);
+ buf[off++] = ((pr_reg->pr_res_key >> 24) & 0xff);
+ buf[off++] = ((pr_reg->pr_res_key >> 16) & 0xff);
+ buf[off++] = ((pr_reg->pr_res_key >> 8) & 0xff);
+ buf[off++] = (pr_reg->pr_res_key & 0xff);
+ off += 4; /* Skip Over Reserved area */
+
+ /*
+ * Set ALL_TG_PT bit if PROUT SA REGISTER had this set.
+ */
+ if (pr_reg->pr_reg_all_tg_pt)
+ buf[off] = 0x02;
+ /*
+ * The struct se_lun pointer will be present for the
+ * reservation holder for PR_HOLDER bit.
+ *
+ * Also, if this registration is the reservation
+ * holder, fill in SCOPE and TYPE in the next byte.
+ */
+ if (pr_reg->pr_res_holder) {
+ buf[off++] |= 0x01;
+ buf[off++] = (pr_reg->pr_res_scope & 0xf0) |
+ (pr_reg->pr_res_type & 0x0f);
+ } else
+ off += 2;
+
+ off += 4; /* Skip over reserved area */
+ /*
+ * From spc4r17 6.3.15:
+ *
+ * If the ALL_TG_PT bit set to zero, the RELATIVE TARGET PORT
+ * IDENTIFIER field contains the relative port identifier (see
+ * 3.1.120) of the target port that is part of the I_T nexus
+ * described by this full status descriptor. If the ALL_TG_PT
+ * bit is set to one, the contents of the RELATIVE TARGET PORT
+ * IDENTIFIER field are not defined by this standard.
+ */
+ if (!(pr_reg->pr_reg_all_tg_pt)) {
+ struct se_port *port = pr_reg->pr_reg_tg_pt_lun->lun_sep;
+
+ buf[off++] = ((port->sep_rtpi >> 8) & 0xff);
+ buf[off++] = (port->sep_rtpi & 0xff);
+ } else
+ off += 2; /* Skip over RELATIVE TARGET PORT IDENTIFER */
+
+ /*
+ * Now, have the $FABRIC_MOD fill in the protocol identifier
+ */
+ desc_len = TPG_TFO(se_tpg)->tpg_get_pr_transport_id(se_tpg,
+ se_nacl, pr_reg, &format_code, &buf[off+4]);
+
+ spin_lock(&pr_tmpl->registration_lock);
+ atomic_dec(&pr_reg->pr_res_holders);
+ smp_mb__after_atomic_dec();
+ /*
+ * Set the ADDITIONAL DESCRIPTOR LENGTH
+ */
+ buf[off++] = ((desc_len >> 24) & 0xff);
+ buf[off++] = ((desc_len >> 16) & 0xff);
+ buf[off++] = ((desc_len >> 8) & 0xff);
+ buf[off++] = (desc_len & 0xff);
+ /*
+ * Size of full desctipor header minus TransportID
+ * containing $FABRIC_MOD specific) initiator device/port
+ * WWN information.
+ *
+ * See spc4r17 Section 6.13.5 Table 169
+ */
+ add_desc_len = (24 + desc_len);
+
+ off += desc_len;
+ add_len += add_desc_len;
+ }
+ spin_unlock(&pr_tmpl->registration_lock);
+ /*
+ * Set ADDITIONAL_LENGTH
+ */
+ buf[4] = ((add_len >> 24) & 0xff);
+ buf[5] = ((add_len >> 16) & 0xff);
+ buf[6] = ((add_len >> 8) & 0xff);
+ buf[7] = (add_len & 0xff);
+
+ return 0;
+}
+
+static int core_scsi3_emulate_pr_in(struct se_cmd *cmd, unsigned char *cdb)
+{
+ switch (cdb[1] & 0x1f) {
+ case PRI_READ_KEYS:
+ return core_scsi3_pri_read_keys(cmd);
+ case PRI_READ_RESERVATION:
+ return core_scsi3_pri_read_reservation(cmd);
+ case PRI_REPORT_CAPABILITIES:
+ return core_scsi3_pri_report_capabilities(cmd);
+ case PRI_READ_FULL_STATUS:
+ return core_scsi3_pri_read_full_status(cmd);
+ default:
+ printk(KERN_ERR "Unknown PERSISTENT_RESERVE_IN service"
+ " action: 0x%02x\n", cdb[1] & 0x1f);
+ return PYX_TRANSPORT_INVALID_CDB_FIELD;
+ }
+
+}
+
+int core_scsi3_emulate_pr(struct se_cmd *cmd)
+{
+ unsigned char *cdb = &T_TASK(cmd)->t_task_cdb[0];
+ struct se_device *dev = cmd->se_dev;
+ /*
+ * Following spc2r20 5.5.1 Reservations overview:
+ *
+ * If a logical unit has been reserved by any RESERVE command and is
+ * still reserved by any initiator, all PERSISTENT RESERVE IN and all
+ * PERSISTENT RESERVE OUT commands shall conflict regardless of
+ * initiator or service action and shall terminate with a RESERVATION
+ * CONFLICT status.
+ */
+ if (dev->dev_flags & DF_SPC2_RESERVATIONS) {
+ printk(KERN_ERR "Received PERSISTENT_RESERVE CDB while legacy"
+ " SPC-2 reservation is held, returning"
+ " RESERVATION_CONFLICT\n");
+ return PYX_TRANSPORT_RESERVATION_CONFLICT;
+ }
+
+ return (cdb[0] == PERSISTENT_RESERVE_OUT) ?
+ core_scsi3_emulate_pr_out(cmd, cdb) :
+ core_scsi3_emulate_pr_in(cmd, cdb);
+}
+
+static int core_pt_reservation_check(struct se_cmd *cmd, u32 *pr_res_type)
+{
+ return 0;
+}
+
+static int core_pt_seq_non_holder(
+ struct se_cmd *cmd,
+ unsigned char *cdb,
+ u32 pr_reg_type)
+{
+ return 0;
+}
+
+int core_setup_reservations(struct se_device *dev, int force_pt)
+{
+ struct se_subsystem_dev *su_dev = dev->se_sub_dev;
+ struct t10_reservation_template *rest = &su_dev->t10_reservation;
+ /*
+ * If this device is from Target_Core_Mod/pSCSI, use the reservations
+ * of the Underlying SCSI hardware. In Linux/SCSI terms, this can
+ * cause a problem because libata and some SATA RAID HBAs appear
+ * under Linux/SCSI, but to emulate reservations themselves.
+ */
+ if (((TRANSPORT(dev)->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV) &&
+ !(DEV_ATTRIB(dev)->emulate_reservations)) || force_pt) {
+ rest->res_type = SPC_PASSTHROUGH;
+ rest->pr_ops.t10_reservation_check = &core_pt_reservation_check;
+ rest->pr_ops.t10_seq_non_holder = &core_pt_seq_non_holder;
+ printk(KERN_INFO "%s: Using SPC_PASSTHROUGH, no reservation"
+ " emulation\n", TRANSPORT(dev)->name);
+ return 0;
+ }
+ /*
+ * If SPC-3 or above is reported by real or emulated struct se_device,
+ * use emulated Persistent Reservations.
+ */
+ if (TRANSPORT(dev)->get_device_rev(dev) >= SCSI_3) {
+ rest->res_type = SPC3_PERSISTENT_RESERVATIONS;
+ rest->pr_ops.t10_reservation_check = &core_scsi3_pr_reservation_check;
+ rest->pr_ops.t10_seq_non_holder = &core_scsi3_pr_seq_non_holder;
+ printk(KERN_INFO "%s: Using SPC3_PERSISTENT_RESERVATIONS"
+ " emulation\n", TRANSPORT(dev)->name);
+ } else {
+ rest->res_type = SPC2_RESERVATIONS;
+ rest->pr_ops.t10_reservation_check = &core_scsi2_reservation_check;
+ rest->pr_ops.t10_seq_non_holder =
+ &core_scsi2_reservation_seq_non_holder;
+ printk(KERN_INFO "%s: Using SPC2_RESERVATIONS emulation\n",
+ TRANSPORT(dev)->name);
+ }
+
+ return 0;
+}
diff --git a/drivers/target/target_core_pr.h b/drivers/target/target_core_pr.h
new file mode 100644
index 0000000..5603bcf
--- /dev/null
+++ b/drivers/target/target_core_pr.h
@@ -0,0 +1,67 @@
+#ifndef TARGET_CORE_PR_H
+#define TARGET_CORE_PR_H
+/*
+ * PERSISTENT_RESERVE_OUT service action codes
+ *
+ * spc4r17 section 6.14.2 Table 171
+ */
+#define PRO_REGISTER 0x00
+#define PRO_RESERVE 0x01
+#define PRO_RELEASE 0x02
+#define PRO_CLEAR 0x03
+#define PRO_PREEMPT 0x04
+#define PRO_PREEMPT_AND_ABORT 0x05
+#define PRO_REGISTER_AND_IGNORE_EXISTING_KEY 0x06
+#define PRO_REGISTER_AND_MOVE 0x07
+/*
+ * PERSISTENT_RESERVE_IN service action codes
+ *
+ * spc4r17 section 6.13.1 Table 159
+ */
+#define PRI_READ_KEYS 0x00
+#define PRI_READ_RESERVATION 0x01
+#define PRI_REPORT_CAPABILITIES 0x02
+#define PRI_READ_FULL_STATUS 0x03
+/*
+ * PERSISTENT_RESERVE_ SCOPE field
+ *
+ * spc4r17 section 6.13.3.3 Table 163
+ */
+#define PR_SCOPE_LU_SCOPE 0x00
+/*
+ * PERSISTENT_RESERVE_* TYPE field
+ *
+ * spc4r17 section 6.13.3.4 Table 164
+ */
+#define PR_TYPE_WRITE_EXCLUSIVE 0x01
+#define PR_TYPE_EXCLUSIVE_ACCESS 0x03
+#define PR_TYPE_WRITE_EXCLUSIVE_REGONLY 0x05
+#define PR_TYPE_EXCLUSIVE_ACCESS_REGONLY 0x06
+#define PR_TYPE_WRITE_EXCLUSIVE_ALLREG 0x07
+#define PR_TYPE_EXCLUSIVE_ACCESS_ALLREG 0x08
+
+#define PR_APTPL_MAX_IPORT_LEN 256
+#define PR_APTPL_MAX_TPORT_LEN 256
+
+extern struct kmem_cache *t10_pr_reg_cache;
+
+extern int core_pr_dump_initiator_port(struct t10_pr_registration *,
+ char *, u32);
+extern int core_scsi2_emulate_crh(struct se_cmd *);
+extern int core_scsi3_alloc_aptpl_registration(
+ struct t10_reservation_template *, u64,
+ unsigned char *, unsigned char *, u32,
+ unsigned char *, u16, u32, int, int, u8);
+extern int core_scsi3_check_aptpl_registration(struct se_device *,
+ struct se_portal_group *, struct se_lun *,
+ struct se_lun_acl *);
+extern void core_scsi3_free_pr_reg_from_nacl(struct se_device *,
+ struct se_node_acl *);
+extern void core_scsi3_free_all_registrations(struct se_device *);
+extern unsigned char *core_scsi3_pr_dump_type(int);
+extern int core_scsi3_check_cdb_abort_and_preempt(struct list_head *,
+ struct se_cmd *);
+extern int core_scsi3_emulate_pr(struct se_cmd *);
+extern int core_setup_reservations(struct se_device *, int);
+
+#endif /* TARGET_CORE_PR_H */
--
1.7.3.4
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^ permalink raw reply related [flat|nested] 22+ messages in thread* [PATCH v2 02j/03] target: Add Task Management infrastructure
2010-12-17 21:11 [PATCH v2 00/03] target: Initial merge of v4.0.0-rc6 for .38 Nicholas A. Bellinger
` (9 preceding siblings ...)
2010-12-17 21:11 ` [PATCH v2 02i/03] target: Add SPC-4 compliant Persistent Reservations (PR) Nicholas A. Bellinger
@ 2010-12-17 21:11 ` Nicholas A. Bellinger
2010-12-17 21:11 ` [PATCH v2 02k/03] target: Add UNIT_ATTENTION infrastructure support Nicholas A. Bellinger
` (9 subsequent siblings)
20 siblings, 0 replies; 22+ messages in thread
From: Nicholas A. Bellinger @ 2010-12-17 21:11 UTC (permalink / raw)
To: linux-scsi, James Bottomley; +Cc: Nicholas Bellinger
From: Nicholas Bellinger <nab@linux-iscsi.org>
This patch adds SPC-3 task management infrastructure and functionality for
LUN_RESET with TASK_ABORTED status (TAS) and in combination with handling
Persistent Reservation PREEMPT_AND_ABORT service action.
Signed-off-by: Nicholas A. Bellinger <nab@linux-iscsi.org>
---
drivers/target/target_core_tmr.c | 395 ++++++++++++++++++++++++++++++++++++++
include/target/target_core_tmr.h | 43 ++++
2 files changed, 438 insertions(+), 0 deletions(-)
create mode 100644 drivers/target/target_core_tmr.c
create mode 100644 include/target/target_core_tmr.h
diff --git a/drivers/target/target_core_tmr.c b/drivers/target/target_core_tmr.c
new file mode 100644
index 0000000..33810b0
--- /dev/null
+++ b/drivers/target/target_core_tmr.c
@@ -0,0 +1,395 @@
+/*******************************************************************************
+ * Filename: target_core_tmr.c
+ *
+ * This file contains SPC-3 task management infrastructure
+ *
+ * Copyright (c) 2009,2010 Rising Tide Systems
+ * Copyright (c) 2009,2010 Linux-iSCSI.org
+ *
+ * Nicholas A. Bellinger <nab@kernel.org>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+ *
+ ******************************************************************************/
+
+#include <linux/version.h>
+#include <linux/slab.h>
+#include <linux/spinlock.h>
+#include <linux/list.h>
+#include <scsi/scsi.h>
+#include <scsi/scsi_cmnd.h>
+
+#include <target/target_core_base.h>
+#include <target/target_core_device.h>
+#include <target/target_core_tmr.h>
+#include <target/target_core_transport.h>
+#include <target/target_core_fabric_ops.h>
+#include <target/target_core_configfs.h>
+
+#include "target_core_alua.h"
+#include "target_core_pr.h"
+
+#define DEBUG_LUN_RESET
+#ifdef DEBUG_LUN_RESET
+#define DEBUG_LR(x...) printk(KERN_INFO x)
+#else
+#define DEBUG_LR(x...)
+#endif
+
+struct se_tmr_req *core_tmr_alloc_req(
+ struct se_cmd *se_cmd,
+ void *fabric_tmr_ptr,
+ u8 function)
+{
+ struct se_tmr_req *tmr;
+
+ tmr = kmem_cache_zalloc(se_tmr_req_cache, GFP_KERNEL);
+ if (!(tmr)) {
+ printk(KERN_ERR "Unable to allocate struct se_tmr_req\n");
+ return ERR_PTR(-ENOMEM);
+ }
+ tmr->task_cmd = se_cmd;
+ tmr->fabric_tmr_ptr = fabric_tmr_ptr;
+ tmr->function = function;
+ INIT_LIST_HEAD(&tmr->tmr_list);
+
+ return tmr;
+}
+EXPORT_SYMBOL(core_tmr_alloc_req);
+
+void core_tmr_release_req(
+ struct se_tmr_req *tmr)
+{
+ struct se_device *dev = tmr->tmr_dev;
+
+ spin_lock(&dev->se_tmr_lock);
+ list_del(&tmr->tmr_list);
+ kmem_cache_free(se_tmr_req_cache, tmr);
+ spin_unlock(&dev->se_tmr_lock);
+}
+
+static void core_tmr_handle_tas_abort(
+ struct se_node_acl *tmr_nacl,
+ struct se_cmd *cmd,
+ int tas,
+ int fe_count)
+{
+ if (!(fe_count)) {
+ transport_cmd_finish_abort(cmd, 1);
+ return;
+ }
+ /*
+ * TASK ABORTED status (TAS) bit support
+ */
+ if (((tmr_nacl != NULL) &&
+ (tmr_nacl == cmd->se_sess->se_node_acl)) || tas)
+ transport_send_task_abort(cmd);
+
+ transport_cmd_finish_abort(cmd, 0);
+}
+
+int core_tmr_lun_reset(
+ struct se_device *dev,
+ struct se_tmr_req *tmr,
+ struct list_head *preempt_and_abort_list,
+ struct se_cmd *prout_cmd)
+{
+ struct se_cmd *cmd;
+ struct se_queue_req *qr, *qr_tmp;
+ struct se_node_acl *tmr_nacl = NULL;
+ struct se_portal_group *tmr_tpg = NULL;
+ struct se_queue_obj *qobj = dev->dev_queue_obj;
+ struct se_tmr_req *tmr_p, *tmr_pp;
+ struct se_task *task, *task_tmp;
+ unsigned long flags;
+ int fe_count, state, tas;
+ /*
+ * TASK_ABORTED status bit, this is configurable via ConfigFS
+ * struct se_device attributes. spc4r17 section 7.4.6 Control mode page
+ *
+ * A task aborted status (TAS) bit set to zero specifies that aborted
+ * tasks shall be terminated by the device server without any response
+ * to the application client. A TAS bit set to one specifies that tasks
+ * aborted by the actions of an I_T nexus other than the I_T nexus on
+ * which the command was received shall be completed with TASK ABORTED
+ * status (see SAM-4).
+ */
+ tas = DEV_ATTRIB(dev)->emulate_tas;
+ /*
+ * Determine if this se_tmr is coming from a $FABRIC_MOD
+ * or struct se_device passthrough..
+ */
+ if (tmr && tmr->task_cmd && tmr->task_cmd->se_sess) {
+ tmr_nacl = tmr->task_cmd->se_sess->se_node_acl;
+ tmr_tpg = tmr->task_cmd->se_sess->se_tpg;
+ if (tmr_nacl && tmr_tpg) {
+ DEBUG_LR("LUN_RESET: TMR caller fabric: %s"
+ " initiator port %s\n",
+ TPG_TFO(tmr_tpg)->get_fabric_name(),
+ tmr_nacl->initiatorname);
+ }
+ }
+ DEBUG_LR("LUN_RESET: %s starting for [%s], tas: %d\n",
+ (preempt_and_abort_list) ? "Preempt" : "TMR",
+ TRANSPORT(dev)->name, tas);
+ /*
+ * Release all pending and outgoing TMRs aside from the received
+ * LUN_RESET tmr..
+ */
+ spin_lock(&dev->se_tmr_lock);
+ list_for_each_entry_safe(tmr_p, tmr_pp, &dev->dev_tmr_list, tmr_list) {
+ /*
+ * Allow the received TMR to return with FUNCTION_COMPLETE.
+ */
+ if (tmr && (tmr_p == tmr))
+ continue;
+
+ cmd = tmr_p->task_cmd;
+ if (!(cmd)) {
+ printk(KERN_ERR "Unable to locate struct se_cmd for TMR\n");
+ continue;
+ }
+ /*
+ * If this function was called with a valid pr_res_key
+ * parameter (eg: for PROUT PREEMPT_AND_ABORT service action
+ * skip non regisration key matching TMRs.
+ */
+ if ((preempt_and_abort_list != NULL) &&
+ (core_scsi3_check_cdb_abort_and_preempt(
+ preempt_and_abort_list, cmd) != 0))
+ continue;
+ spin_unlock(&dev->se_tmr_lock);
+
+ spin_lock_irqsave(&T_TASK(cmd)->t_state_lock, flags);
+ if (!(atomic_read(&T_TASK(cmd)->t_transport_active))) {
+ spin_unlock_irqrestore(&T_TASK(cmd)->t_state_lock, flags);
+ spin_lock(&dev->se_tmr_lock);
+ continue;
+ }
+ if (cmd->t_state == TRANSPORT_ISTATE_PROCESSING) {
+ spin_unlock_irqrestore(&T_TASK(cmd)->t_state_lock, flags);
+ spin_lock(&dev->se_tmr_lock);
+ continue;
+ }
+ DEBUG_LR("LUN_RESET: %s releasing TMR %p Function: 0x%02x,"
+ " Response: 0x%02x, t_state: %d\n",
+ (preempt_and_abort_list) ? "Preempt" : "", tmr_p,
+ tmr_p->function, tmr_p->response, cmd->t_state);
+ spin_unlock_irqrestore(&T_TASK(cmd)->t_state_lock, flags);
+
+ transport_cmd_finish_abort_tmr(cmd);
+ spin_lock(&dev->se_tmr_lock);
+ }
+ spin_unlock(&dev->se_tmr_lock);
+ /*
+ * Complete outstanding struct se_task CDBs with TASK_ABORTED SAM status.
+ * This is following sam4r17, section 5.6 Aborting commands, Table 38
+ * for TMR LUN_RESET:
+ *
+ * a) "Yes" indicates that each command that is aborted on an I_T nexus
+ * other than the one that caused the SCSI device condition is
+ * completed with TASK ABORTED status, if the TAS bit is set to one in
+ * the Control mode page (see SPC-4). "No" indicates that no status is
+ * returned for aborted commands.
+ *
+ * d) If the logical unit reset is caused by a particular I_T nexus
+ * (e.g., by a LOGICAL UNIT RESET task management function), then "yes"
+ * (TASK_ABORTED status) applies.
+ *
+ * Otherwise (e.g., if triggered by a hard reset), "no"
+ * (no TASK_ABORTED SAM status) applies.
+ *
+ * Note that this seems to be independent of TAS (Task Aborted Status)
+ * in the Control Mode Page.
+ */
+ spin_lock_irqsave(&dev->execute_task_lock, flags);
+ list_for_each_entry_safe(task, task_tmp, &dev->state_task_list,
+ t_state_list) {
+ if (!(TASK_CMD(task))) {
+ printk(KERN_ERR "TASK_CMD(task) is NULL!\n");
+ continue;
+ }
+ cmd = TASK_CMD(task);
+
+ if (!T_TASK(cmd)) {
+ printk(KERN_ERR "T_TASK(cmd) is NULL for task: %p cmd:"
+ " %p ITT: 0x%08x\n", task, cmd,
+ CMD_TFO(cmd)->get_task_tag(cmd));
+ continue;
+ }
+ /*
+ * For PREEMPT_AND_ABORT usage, only process commands
+ * with a matching reservation key.
+ */
+ if ((preempt_and_abort_list != NULL) &&
+ (core_scsi3_check_cdb_abort_and_preempt(
+ preempt_and_abort_list, cmd) != 0))
+ continue;
+ /*
+ * Not aborting PROUT PREEMPT_AND_ABORT CDB..
+ */
+ if (prout_cmd == cmd)
+ continue;
+
+ list_del(&task->t_state_list);
+ atomic_set(&task->task_state_active, 0);
+ spin_unlock_irqrestore(&dev->execute_task_lock, flags);
+
+ spin_lock_irqsave(&T_TASK(cmd)->t_state_lock, flags);
+ DEBUG_LR("LUN_RESET: %s cmd: %p task: %p"
+ " ITT/CmdSN: 0x%08x/0x%08x, i_state: %d, t_state/"
+ "def_t_state: %d/%d cdb: 0x%02x\n",
+ (preempt_and_abort_list) ? "Preempt" : "", cmd, task,
+ CMD_TFO(cmd)->get_task_tag(cmd), 0,
+ CMD_TFO(cmd)->get_cmd_state(cmd), cmd->t_state,
+ cmd->deferred_t_state, T_TASK(cmd)->t_task_cdb[0]);
+ DEBUG_LR("LUN_RESET: ITT[0x%08x] - pr_res_key: 0x%016Lx"
+ " t_task_cdbs: %d t_task_cdbs_left: %d"
+ " t_task_cdbs_sent: %d -- t_transport_active: %d"
+ " t_transport_stop: %d t_transport_sent: %d\n",
+ CMD_TFO(cmd)->get_task_tag(cmd), cmd->pr_res_key,
+ T_TASK(cmd)->t_task_cdbs,
+ atomic_read(&T_TASK(cmd)->t_task_cdbs_left),
+ atomic_read(&T_TASK(cmd)->t_task_cdbs_sent),
+ atomic_read(&T_TASK(cmd)->t_transport_active),
+ atomic_read(&T_TASK(cmd)->t_transport_stop),
+ atomic_read(&T_TASK(cmd)->t_transport_sent));
+
+ if (atomic_read(&task->task_active)) {
+ atomic_set(&task->task_stop, 1);
+ spin_unlock_irqrestore(
+ &T_TASK(cmd)->t_state_lock, flags);
+
+ DEBUG_LR("LUN_RESET: Waiting for task: %p to shutdown"
+ " for dev: %p\n", task, dev);
+ wait_for_completion(&task->task_stop_comp);
+ DEBUG_LR("LUN_RESET Completed task: %p shutdown for"
+ " dev: %p\n", task, dev);
+ spin_lock_irqsave(&T_TASK(cmd)->t_state_lock, flags);
+ atomic_dec(&T_TASK(cmd)->t_task_cdbs_left);
+
+ atomic_set(&task->task_active, 0);
+ atomic_set(&task->task_stop, 0);
+ }
+ __transport_stop_task_timer(task, &flags);
+
+ if (!(atomic_dec_and_test(&T_TASK(cmd)->t_task_cdbs_ex_left))) {
+ spin_unlock_irqrestore(
+ &T_TASK(cmd)->t_state_lock, flags);
+ DEBUG_LR("LUN_RESET: Skipping task: %p, dev: %p for"
+ " t_task_cdbs_ex_left: %d\n", task, dev,
+ atomic_read(&T_TASK(cmd)->t_task_cdbs_ex_left));
+
+ spin_lock_irqsave(&dev->execute_task_lock, flags);
+ continue;
+ }
+ fe_count = atomic_read(&T_TASK(cmd)->t_fe_count);
+
+ if (atomic_read(&T_TASK(cmd)->t_transport_active)) {
+ DEBUG_LR("LUN_RESET: got t_transport_active = 1 for"
+ " task: %p, t_fe_count: %d dev: %p\n", task,
+ fe_count, dev);
+ spin_unlock_irqrestore(&T_TASK(cmd)->t_state_lock,
+ flags);
+ core_tmr_handle_tas_abort(tmr_nacl, cmd, tas, fe_count);
+
+ spin_lock_irqsave(&dev->execute_task_lock, flags);
+ continue;
+ }
+ DEBUG_LR("LUN_RESET: Got t_transport_active = 0 for task: %p,"
+ " t_fe_count: %d dev: %p\n", task, fe_count, dev);
+ spin_unlock_irqrestore(&T_TASK(cmd)->t_state_lock, flags);
+ core_tmr_handle_tas_abort(tmr_nacl, cmd, tas, fe_count);
+
+ spin_lock_irqsave(&dev->execute_task_lock, flags);
+ }
+ spin_unlock_irqrestore(&dev->execute_task_lock, flags);
+ /*
+ * Release all commands remaining in the struct se_device cmd queue.
+ *
+ * This follows the same logic as above for the struct se_device
+ * struct se_task state list, where commands are returned with
+ * TASK_ABORTED status, if there is an outstanding $FABRIC_MOD
+ * reference, otherwise the struct se_cmd is released.
+ */
+ spin_lock_irqsave(&qobj->cmd_queue_lock, flags);
+ list_for_each_entry_safe(qr, qr_tmp, &qobj->qobj_list, qr_list) {
+ cmd = (struct se_cmd *)qr->cmd;
+ if (!(cmd)) {
+ /*
+ * Skip these for non PREEMPT_AND_ABORT usage..
+ */
+ if (preempt_and_abort_list != NULL)
+ continue;
+
+ atomic_dec(&qobj->queue_cnt);
+ list_del(&qr->qr_list);
+ kfree(qr);
+ continue;
+ }
+ /*
+ * For PREEMPT_AND_ABORT usage, only process commands
+ * with a matching reservation key.
+ */
+ if ((preempt_and_abort_list != NULL) &&
+ (core_scsi3_check_cdb_abort_and_preempt(
+ preempt_and_abort_list, cmd) != 0))
+ continue;
+ /*
+ * Not aborting PROUT PREEMPT_AND_ABORT CDB..
+ */
+ if (prout_cmd == cmd)
+ continue;
+
+ atomic_dec(&T_TASK(cmd)->t_transport_queue_active);
+ atomic_dec(&qobj->queue_cnt);
+ list_del(&qr->qr_list);
+ spin_unlock_irqrestore(&qobj->cmd_queue_lock, flags);
+
+ state = qr->state;
+ kfree(qr);
+
+ DEBUG_LR("LUN_RESET: %s from Device Queue: cmd: %p t_state:"
+ " %d t_fe_count: %d\n", (preempt_and_abort_list) ?
+ "Preempt" : "", cmd, state,
+ atomic_read(&T_TASK(cmd)->t_fe_count));
+
+ core_tmr_handle_tas_abort(tmr_nacl, cmd, tas,
+ atomic_read(&T_TASK(cmd)->t_fe_count));
+ spin_lock_irqsave(&qobj->cmd_queue_lock, flags);
+ }
+ spin_unlock_irqrestore(&qobj->cmd_queue_lock, flags);
+ /*
+ * Clear any legacy SPC-2 reservation when called during
+ * LOGICAL UNIT RESET
+ */
+ if (!(preempt_and_abort_list) &&
+ (dev->dev_flags & DF_SPC2_RESERVATIONS)) {
+ spin_lock(&dev->dev_reservation_lock);
+ dev->dev_reserved_node_acl = NULL;
+ dev->dev_flags &= ~DF_SPC2_RESERVATIONS;
+ spin_unlock(&dev->dev_reservation_lock);
+ printk(KERN_INFO "LUN_RESET: SCSI-2 Released reservation\n");
+ }
+
+ spin_lock(&dev->stats_lock);
+ dev->num_resets++;
+ spin_unlock(&dev->stats_lock);
+
+ DEBUG_LR("LUN_RESET: %s for [%s] Complete\n",
+ (preempt_and_abort_list) ? "Preempt" : "TMR",
+ TRANSPORT(dev)->name);
+ return 0;
+}
diff --git a/include/target/target_core_tmr.h b/include/target/target_core_tmr.h
new file mode 100644
index 0000000..6c8248b
--- /dev/null
+++ b/include/target/target_core_tmr.h
@@ -0,0 +1,43 @@
+#ifndef TARGET_CORE_TMR_H
+#define TARGET_CORE_TMR_H
+
+/* task management function values */
+#ifdef ABORT_TASK
+#undef ABORT_TASK
+#endif /* ABORT_TASK */
+#define ABORT_TASK 1
+#ifdef ABORT_TASK_SET
+#undef ABORT_TASK_SET
+#endif /* ABORT_TASK_SET */
+#define ABORT_TASK_SET 2
+#ifdef CLEAR_ACA
+#undef CLEAR_ACA
+#endif /* CLEAR_ACA */
+#define CLEAR_ACA 3
+#ifdef CLEAR_TASK_SET
+#undef CLEAR_TASK_SET
+#endif /* CLEAR_TASK_SET */
+#define CLEAR_TASK_SET 4
+#define LUN_RESET 5
+#define TARGET_WARM_RESET 6
+#define TARGET_COLD_RESET 7
+#define TASK_REASSIGN 8
+
+/* task management response values */
+#define TMR_FUNCTION_COMPLETE 0
+#define TMR_TASK_DOES_NOT_EXIST 1
+#define TMR_LUN_DOES_NOT_EXIST 2
+#define TMR_TASK_STILL_ALLEGIANT 3
+#define TMR_TASK_FAILOVER_NOT_SUPPORTED 4
+#define TMR_TASK_MGMT_FUNCTION_NOT_SUPPORTED 5
+#define TMR_FUNCTION_AUTHORIZATION_FAILED 6
+#define TMR_FUNCTION_REJECTED 255
+
+extern struct kmem_cache *se_tmr_req_cache;
+
+extern struct se_tmr_req *core_tmr_alloc_req(struct se_cmd *, void *, u8);
+extern void core_tmr_release_req(struct se_tmr_req *);
+extern int core_tmr_lun_reset(struct se_device *, struct se_tmr_req *,
+ struct list_head *, struct se_cmd *);
+
+#endif /* TARGET_CORE_TMR_H */
--
1.7.3.4
^ permalink raw reply related [flat|nested] 22+ messages in thread* [PATCH v2 02k/03] target: Add UNIT_ATTENTION infrastructure support
2010-12-17 21:11 [PATCH v2 00/03] target: Initial merge of v4.0.0-rc6 for .38 Nicholas A. Bellinger
` (10 preceding siblings ...)
2010-12-17 21:11 ` [PATCH v2 02j/03] target: Add Task Management infrastructure Nicholas A. Bellinger
@ 2010-12-17 21:11 ` Nicholas A. Bellinger
2010-12-17 21:11 ` [PATCH v2 02l/03] target: Add SCSI MIB statistics support Nicholas A. Bellinger
` (8 subsequent siblings)
20 siblings, 0 replies; 22+ messages in thread
From: Nicholas A. Bellinger @ 2010-12-17 21:11 UTC (permalink / raw)
To: linux-scsi, James Bottomley; +Cc: Nicholas Bellinger
From: Nicholas Bellinger <nab@linux-iscsi.org>
This patch adds support for SPC-3 compliant UNIT Attention emulation that is used
by Persistent Reservations, ALUA, and TCM fabric module code.
Signed-off-by: Nicholas A. Bellinger <nab@linux-iscsi.org>
---
drivers/target/target_core_ua.c | 332 +++++++++++++++++++++++++++++++++++++++
drivers/target/target_core_ua.h | 36 +++++
2 files changed, 368 insertions(+), 0 deletions(-)
create mode 100644 drivers/target/target_core_ua.c
create mode 100644 drivers/target/target_core_ua.h
diff --git a/drivers/target/target_core_ua.c b/drivers/target/target_core_ua.c
new file mode 100644
index 0000000..a2ef346
--- /dev/null
+++ b/drivers/target/target_core_ua.c
@@ -0,0 +1,332 @@
+/*******************************************************************************
+ * Filename: target_core_ua.c
+ *
+ * This file contains logic for SPC-3 Unit Attention emulation
+ *
+ * Copyright (c) 2009,2010 Rising Tide Systems
+ * Copyright (c) 2009,2010 Linux-iSCSI.org
+ *
+ * Nicholas A. Bellinger <nab@kernel.org>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+ *
+ ******************************************************************************/
+
+#include <linux/version.h>
+#include <linux/slab.h>
+#include <linux/spinlock.h>
+#include <scsi/scsi.h>
+#include <scsi/scsi_cmnd.h>
+
+#include <target/target_core_base.h>
+#include <target/target_core_device.h>
+#include <target/target_core_transport.h>
+#include <target/target_core_fabric_ops.h>
+#include <target/target_core_configfs.h>
+
+#include "target_core_alua.h"
+#include "target_core_hba.h"
+#include "target_core_pr.h"
+#include "target_core_ua.h"
+
+int core_scsi3_ua_check(
+ struct se_cmd *cmd,
+ unsigned char *cdb)
+{
+ struct se_dev_entry *deve;
+ struct se_session *sess = cmd->se_sess;
+ struct se_node_acl *nacl;
+
+ if (!(sess))
+ return 0;
+
+ nacl = sess->se_node_acl;
+ if (!(nacl))
+ return 0;
+
+ deve = &nacl->device_list[cmd->orig_fe_lun];
+ if (!(atomic_read(&deve->ua_count)))
+ return 0;
+ /*
+ * From sam4r14, section 5.14 Unit attention condition:
+ *
+ * a) if an INQUIRY command enters the enabled command state, the
+ * device server shall process the INQUIRY command and shall neither
+ * report nor clear any unit attention condition;
+ * b) if a REPORT LUNS command enters the enabled command state, the
+ * device server shall process the REPORT LUNS command and shall not
+ * report any unit attention condition;
+ * e) if a REQUEST SENSE command enters the enabled command state while
+ * a unit attention condition exists for the SCSI initiator port
+ * associated with the I_T nexus on which the REQUEST SENSE command
+ * was received, then the device server shall process the command
+ * and either:
+ */
+ switch (cdb[0]) {
+ case INQUIRY:
+ case REPORT_LUNS:
+ case REQUEST_SENSE:
+ return 0;
+ default:
+ return -1;
+ }
+
+ return -1;
+}
+
+int core_scsi3_ua_allocate(
+ struct se_node_acl *nacl,
+ u32 unpacked_lun,
+ u8 asc,
+ u8 ascq)
+{
+ struct se_dev_entry *deve;
+ struct se_ua *ua, *ua_p, *ua_tmp;
+ /*
+ * PASSTHROUGH OPS
+ */
+ if (!(nacl))
+ return -1;
+
+ ua = kmem_cache_zalloc(se_ua_cache, GFP_ATOMIC);
+ if (!(ua)) {
+ printk(KERN_ERR "Unable to allocate struct se_ua\n");
+ return -1;
+ }
+ INIT_LIST_HEAD(&ua->ua_dev_list);
+ INIT_LIST_HEAD(&ua->ua_nacl_list);
+
+ ua->ua_nacl = nacl;
+ ua->ua_asc = asc;
+ ua->ua_ascq = ascq;
+
+ spin_lock_irq(&nacl->device_list_lock);
+ deve = &nacl->device_list[unpacked_lun];
+
+ spin_lock(&deve->ua_lock);
+ list_for_each_entry_safe(ua_p, ua_tmp, &deve->ua_list, ua_nacl_list) {
+ /*
+ * Do not report the same UNIT ATTENTION twice..
+ */
+ if ((ua_p->ua_asc == asc) && (ua_p->ua_ascq == ascq)) {
+ spin_unlock(&deve->ua_lock);
+ spin_unlock_irq(&nacl->device_list_lock);
+ kmem_cache_free(se_ua_cache, ua);
+ return 0;
+ }
+ /*
+ * Attach the highest priority Unit Attention to
+ * the head of the list following sam4r14,
+ * Section 5.14 Unit Attention Condition:
+ *
+ * POWER ON, RESET, OR BUS DEVICE RESET OCCURRED highest
+ * POWER ON OCCURRED or
+ * DEVICE INTERNAL RESET
+ * SCSI BUS RESET OCCURRED or
+ * MICROCODE HAS BEEN CHANGED or
+ * protocol specific
+ * BUS DEVICE RESET FUNCTION OCCURRED
+ * I_T NEXUS LOSS OCCURRED
+ * COMMANDS CLEARED BY POWER LOSS NOTIFICATION
+ * all others Lowest
+ *
+ * Each of the ASCQ codes listed above are defined in
+ * the 29h ASC family, see spc4r17 Table D.1
+ */
+ if (ua_p->ua_asc == 0x29) {
+ if ((asc == 0x29) && (ascq > ua_p->ua_ascq))
+ list_add(&ua->ua_nacl_list,
+ &deve->ua_list);
+ else
+ list_add_tail(&ua->ua_nacl_list,
+ &deve->ua_list);
+ } else if (ua_p->ua_asc == 0x2a) {
+ /*
+ * Incoming Family 29h ASCQ codes will override
+ * Family 2AHh ASCQ codes for Unit Attention condition.
+ */
+ if ((asc == 0x29) || (ascq > ua_p->ua_asc))
+ list_add(&ua->ua_nacl_list,
+ &deve->ua_list);
+ else
+ list_add_tail(&ua->ua_nacl_list,
+ &deve->ua_list);
+ } else
+ list_add_tail(&ua->ua_nacl_list,
+ &deve->ua_list);
+ spin_unlock(&deve->ua_lock);
+ spin_unlock_irq(&nacl->device_list_lock);
+
+ atomic_inc(&deve->ua_count);
+ smp_mb__after_atomic_inc();
+ return 0;
+ }
+ list_add_tail(&ua->ua_nacl_list, &deve->ua_list);
+ spin_unlock(&deve->ua_lock);
+ spin_unlock_irq(&nacl->device_list_lock);
+
+ printk(KERN_INFO "[%s]: Allocated UNIT ATTENTION, mapped LUN: %u, ASC:"
+ " 0x%02x, ASCQ: 0x%02x\n",
+ TPG_TFO(nacl->se_tpg)->get_fabric_name(), unpacked_lun,
+ asc, ascq);
+
+ atomic_inc(&deve->ua_count);
+ smp_mb__after_atomic_inc();
+ return 0;
+}
+
+void core_scsi3_ua_release_all(
+ struct se_dev_entry *deve)
+{
+ struct se_ua *ua, *ua_p;
+
+ spin_lock(&deve->ua_lock);
+ list_for_each_entry_safe(ua, ua_p, &deve->ua_list, ua_nacl_list) {
+ list_del(&ua->ua_nacl_list);
+ kmem_cache_free(se_ua_cache, ua);
+
+ atomic_dec(&deve->ua_count);
+ smp_mb__after_atomic_dec();
+ }
+ spin_unlock(&deve->ua_lock);
+}
+
+void core_scsi3_ua_for_check_condition(
+ struct se_cmd *cmd,
+ u8 *asc,
+ u8 *ascq)
+{
+ struct se_device *dev = SE_DEV(cmd);
+ struct se_dev_entry *deve;
+ struct se_session *sess = cmd->se_sess;
+ struct se_node_acl *nacl;
+ struct se_ua *ua = NULL, *ua_p;
+ int head = 1;
+
+ if (!(sess))
+ return;
+
+ nacl = sess->se_node_acl;
+ if (!(nacl))
+ return;
+
+ spin_lock_irq(&nacl->device_list_lock);
+ deve = &nacl->device_list[cmd->orig_fe_lun];
+ if (!(atomic_read(&deve->ua_count))) {
+ spin_unlock_irq(&nacl->device_list_lock);
+ return;
+ }
+ /*
+ * The highest priority Unit Attentions are placed at the head of the
+ * struct se_dev_entry->ua_list, and will be returned in CHECK_CONDITION +
+ * sense data for the received CDB.
+ */
+ spin_lock(&deve->ua_lock);
+ list_for_each_entry_safe(ua, ua_p, &deve->ua_list, ua_nacl_list) {
+ /*
+ * For ua_intlck_ctrl code not equal to 00b, only report the
+ * highest priority UNIT_ATTENTION and ASC/ASCQ without
+ * clearing it.
+ */
+ if (DEV_ATTRIB(dev)->emulate_ua_intlck_ctrl != 0) {
+ *asc = ua->ua_asc;
+ *ascq = ua->ua_ascq;
+ break;
+ }
+ /*
+ * Otherwise for the default 00b, release the UNIT ATTENTION
+ * condition. Return the ASC/ASCQ of the higest priority UA
+ * (head of the list) in the outgoing CHECK_CONDITION + sense.
+ */
+ if (head) {
+ *asc = ua->ua_asc;
+ *ascq = ua->ua_ascq;
+ head = 0;
+ }
+ list_del(&ua->ua_nacl_list);
+ kmem_cache_free(se_ua_cache, ua);
+
+ atomic_dec(&deve->ua_count);
+ smp_mb__after_atomic_dec();
+ }
+ spin_unlock(&deve->ua_lock);
+ spin_unlock_irq(&nacl->device_list_lock);
+
+ printk(KERN_INFO "[%s]: %s UNIT ATTENTION condition with"
+ " INTLCK_CTRL: %d, mapped LUN: %u, got CDB: 0x%02x"
+ " reported ASC: 0x%02x, ASCQ: 0x%02x\n",
+ TPG_TFO(nacl->se_tpg)->get_fabric_name(),
+ (DEV_ATTRIB(dev)->emulate_ua_intlck_ctrl != 0) ? "Reporting" :
+ "Releasing", DEV_ATTRIB(dev)->emulate_ua_intlck_ctrl,
+ cmd->orig_fe_lun, T_TASK(cmd)->t_task_cdb[0], *asc, *ascq);
+}
+
+int core_scsi3_ua_clear_for_request_sense(
+ struct se_cmd *cmd,
+ u8 *asc,
+ u8 *ascq)
+{
+ struct se_dev_entry *deve;
+ struct se_session *sess = cmd->se_sess;
+ struct se_node_acl *nacl;
+ struct se_ua *ua = NULL, *ua_p;
+ int head = 1;
+
+ if (!(sess))
+ return -1;
+
+ nacl = sess->se_node_acl;
+ if (!(nacl))
+ return -1;
+
+ spin_lock_irq(&nacl->device_list_lock);
+ deve = &nacl->device_list[cmd->orig_fe_lun];
+ if (!(atomic_read(&deve->ua_count))) {
+ spin_unlock_irq(&nacl->device_list_lock);
+ return -1;
+ }
+ /*
+ * The highest priority Unit Attentions are placed at the head of the
+ * struct se_dev_entry->ua_list. The First (and hence highest priority)
+ * ASC/ASCQ will be returned in REQUEST_SENSE payload data for the
+ * matching struct se_lun.
+ *
+ * Once the returning ASC/ASCQ values are set, we go ahead and
+ * release all of the Unit Attention conditions for the assoicated
+ * struct se_lun.
+ */
+ spin_lock(&deve->ua_lock);
+ list_for_each_entry_safe(ua, ua_p, &deve->ua_list, ua_nacl_list) {
+ if (head) {
+ *asc = ua->ua_asc;
+ *ascq = ua->ua_ascq;
+ head = 0;
+ }
+ list_del(&ua->ua_nacl_list);
+ kmem_cache_free(se_ua_cache, ua);
+
+ atomic_dec(&deve->ua_count);
+ smp_mb__after_atomic_dec();
+ }
+ spin_unlock(&deve->ua_lock);
+ spin_unlock_irq(&nacl->device_list_lock);
+
+ printk(KERN_INFO "[%s]: Released UNIT ATTENTION condition, mapped"
+ " LUN: %u, got REQUEST_SENSE reported ASC: 0x%02x,"
+ " ASCQ: 0x%02x\n", TPG_TFO(nacl->se_tpg)->get_fabric_name(),
+ cmd->orig_fe_lun, *asc, *ascq);
+
+ return (head) ? -1 : 0;
+}
diff --git a/drivers/target/target_core_ua.h b/drivers/target/target_core_ua.h
new file mode 100644
index 0000000..6e6b034
--- /dev/null
+++ b/drivers/target/target_core_ua.h
@@ -0,0 +1,36 @@
+#ifndef TARGET_CORE_UA_H
+
+/*
+ * From spc4r17, Table D.1: ASC and ASCQ Assignement
+ */
+#define ASCQ_29H_POWER_ON_RESET_OR_BUS_DEVICE_RESET_OCCURED 0x00
+#define ASCQ_29H_POWER_ON_OCCURRED 0x01
+#define ASCQ_29H_SCSI_BUS_RESET_OCCURED 0x02
+#define ASCQ_29H_BUS_DEVICE_RESET_FUNCTION_OCCURRED 0x03
+#define ASCQ_29H_DEVICE_INTERNAL_RESET 0x04
+#define ASCQ_29H_TRANSCEIVER_MODE_CHANGED_TO_SINGLE_ENDED 0x05
+#define ASCQ_29H_TRANSCEIVER_MODE_CHANGED_TO_LVD 0x06
+#define ASCQ_29H_NEXUS_LOSS_OCCURRED 0x07
+
+#define ASCQ_2AH_PARAMETERS_CHANGED 0x00
+#define ASCQ_2AH_MODE_PARAMETERS_CHANGED 0x01
+#define ASCQ_2AH_LOG_PARAMETERS_CHANGED 0x02
+#define ASCQ_2AH_RESERVATIONS_PREEMPTED 0x03
+#define ASCQ_2AH_RESERVATIONS_RELEASED 0x04
+#define ASCQ_2AH_REGISTRATIONS_PREEMPTED 0x05
+#define ASCQ_2AH_ASYMMETRIC_ACCESS_STATE_CHANGED 0x06
+#define ASCQ_2AH_IMPLICT_ASYMMETRIC_ACCESS_STATE_TRANSITION_FAILED 0x07
+#define ASCQ_2AH_PRIORITY_CHANGED 0x08
+
+#define ASCQ_2CH_PREVIOUS_RESERVATION_CONFLICT_STATUS 0x09
+
+extern struct kmem_cache *se_ua_cache;
+
+extern int core_scsi3_ua_check(struct se_cmd *, unsigned char *);
+extern int core_scsi3_ua_allocate(struct se_node_acl *, u32, u8, u8);
+extern void core_scsi3_ua_release_all(struct se_dev_entry *);
+extern void core_scsi3_ua_for_check_condition(struct se_cmd *, u8 *, u8 *);
+extern int core_scsi3_ua_clear_for_request_sense(struct se_cmd *,
+ u8 *, u8 *);
+
+#endif /* TARGET_CORE_UA_H */
--
1.7.3.4
^ permalink raw reply related [flat|nested] 22+ messages in thread* [PATCH v2 02l/03] target: Add SCSI MIB statistics support
2010-12-17 21:11 [PATCH v2 00/03] target: Initial merge of v4.0.0-rc6 for .38 Nicholas A. Bellinger
` (11 preceding siblings ...)
2010-12-17 21:11 ` [PATCH v2 02k/03] target: Add UNIT_ATTENTION infrastructure support Nicholas A. Bellinger
@ 2010-12-17 21:11 ` Nicholas A. Bellinger
2010-12-17 21:11 ` [PATCH v2 02m/03] target: Add FILEIO subsystem plugin Nicholas A. Bellinger
` (7 subsequent siblings)
20 siblings, 0 replies; 22+ messages in thread
From: Nicholas A. Bellinger @ 2010-12-17 21:11 UTC (permalink / raw)
To: linux-scsi, James Bottomley; +Cc: Nicholas Bellinger
From: Nicholas Bellinger <nab@linux-iscsi.org>
This patch adds support for read-only SCSI MIBs through /proc/scsi_target/mib
following RFC-4455.
Signed-off-by: Nicholas A. Bellinger <nab@linux-iscsi.org>
---
drivers/target/target_core_mib.c | 1078 ++++++++++++++++++++++++++++++++++++++
drivers/target/target_core_mib.h | 28 +
2 files changed, 1106 insertions(+), 0 deletions(-)
create mode 100644 drivers/target/target_core_mib.c
create mode 100644 drivers/target/target_core_mib.h
diff --git a/drivers/target/target_core_mib.c b/drivers/target/target_core_mib.c
new file mode 100644
index 0000000..d5a48aa
--- /dev/null
+++ b/drivers/target/target_core_mib.c
@@ -0,0 +1,1078 @@
+/*******************************************************************************
+ * Filename: target_core_mib.c
+ *
+ * Copyright (c) 2006-2007 SBE, Inc. All Rights Reserved.
+ * Copyright (c) 2007-2010 Rising Tide Systems
+ * Copyright (c) 2008-2010 Linux-iSCSI.org
+ *
+ * Nicholas A. Bellinger <nab@linux-iscsi.org>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+ *
+ ******************************************************************************/
+
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/delay.h>
+#include <linux/timer.h>
+#include <linux/string.h>
+#include <linux/version.h>
+#include <generated/utsrelease.h>
+#include <linux/utsname.h>
+#include <linux/proc_fs.h>
+#include <linux/seq_file.h>
+#include <linux/blkdev.h>
+#include <scsi/scsi.h>
+#include <scsi/scsi_device.h>
+#include <scsi/scsi_host.h>
+
+#include <target/target_core_base.h>
+#include <target/target_core_transport.h>
+#include <target/target_core_fabric_ops.h>
+#include <target/target_core_configfs.h>
+
+#include "target_core_hba.h"
+#include "target_core_mib.h"
+
+/* SCSI mib table index */
+static struct scsi_index_table scsi_index_table;
+
+#ifndef INITIAL_JIFFIES
+#define INITIAL_JIFFIES ((unsigned long)(unsigned int) (-300*HZ))
+#endif
+
+/* SCSI Instance Table */
+#define SCSI_INST_SW_INDEX 1
+#define SCSI_TRANSPORT_INDEX 1
+
+#define NONE "None"
+#define ISPRINT(a) ((a >= ' ') && (a <= '~'))
+
+static inline int list_is_first(const struct list_head *list,
+ const struct list_head *head)
+{
+ return list->prev == head;
+}
+
+static void *locate_hba_start(
+ struct seq_file *seq,
+ loff_t *pos)
+{
+ spin_lock(&se_global->g_device_lock);
+ return seq_list_start(&se_global->g_se_dev_list, *pos);
+}
+
+static void *locate_hba_next(
+ struct seq_file *seq,
+ void *v,
+ loff_t *pos)
+{
+ return seq_list_next(v, &se_global->g_se_dev_list, pos);
+}
+
+static void locate_hba_stop(struct seq_file *seq, void *v)
+{
+ spin_unlock(&se_global->g_device_lock);
+}
+
+/****************************************************************************
+ * SCSI MIB Tables
+ ****************************************************************************/
+
+/*
+ * SCSI Instance Table
+ */
+static void *scsi_inst_seq_start(
+ struct seq_file *seq,
+ loff_t *pos)
+{
+ spin_lock(&se_global->hba_lock);
+ return seq_list_start(&se_global->g_hba_list, *pos);
+}
+
+static void *scsi_inst_seq_next(
+ struct seq_file *seq,
+ void *v,
+ loff_t *pos)
+{
+ return seq_list_next(v, &se_global->g_hba_list, pos);
+}
+
+static void scsi_inst_seq_stop(struct seq_file *seq, void *v)
+{
+ spin_unlock(&se_global->hba_lock);
+}
+
+static int scsi_inst_seq_show(struct seq_file *seq, void *v)
+{
+ struct se_hba *hba = list_entry(v, struct se_hba, hba_list);
+
+ if (list_is_first(&hba->hba_list, &se_global->g_hba_list))
+ seq_puts(seq, "inst sw_indx\n");
+
+ seq_printf(seq, "%u %u\n", hba->hba_index, SCSI_INST_SW_INDEX);
+ seq_printf(seq, "plugin: %s version: %s\n",
+ hba->transport->name, TARGET_CORE_VERSION);
+
+ return 0;
+}
+
+static const struct seq_operations scsi_inst_seq_ops = {
+ .start = scsi_inst_seq_start,
+ .next = scsi_inst_seq_next,
+ .stop = scsi_inst_seq_stop,
+ .show = scsi_inst_seq_show
+};
+
+static int scsi_inst_seq_open(struct inode *inode, struct file *file)
+{
+ return seq_open(file, &scsi_inst_seq_ops);
+}
+
+static const struct file_operations scsi_inst_seq_fops = {
+ .owner = THIS_MODULE,
+ .open = scsi_inst_seq_open,
+ .read = seq_read,
+ .llseek = seq_lseek,
+ .release = seq_release,
+};
+
+/*
+ * SCSI Device Table
+ */
+static void *scsi_dev_seq_start(struct seq_file *seq, loff_t *pos)
+{
+ return locate_hba_start(seq, pos);
+}
+
+static void *scsi_dev_seq_next(struct seq_file *seq, void *v, loff_t *pos)
+{
+ return locate_hba_next(seq, v, pos);
+}
+
+static void scsi_dev_seq_stop(struct seq_file *seq, void *v)
+{
+ locate_hba_stop(seq, v);
+}
+
+static int scsi_dev_seq_show(struct seq_file *seq, void *v)
+{
+ struct se_hba *hba;
+ struct se_subsystem_dev *se_dev = list_entry(v, struct se_subsystem_dev,
+ g_se_dev_list);
+ struct se_device *dev = se_dev->se_dev_ptr;
+ char str[28];
+ int k;
+
+ if (list_is_first(&se_dev->g_se_dev_list, &se_global->g_se_dev_list))
+ seq_puts(seq, "inst indx role ports\n");
+
+ if (!(dev))
+ return 0;
+
+ hba = dev->se_hba;
+ if (!(hba)) {
+ /* Log error ? */
+ return 0;
+ }
+
+ seq_printf(seq, "%u %u %s %u\n", hba->hba_index,
+ dev->dev_index, "Target", dev->dev_port_count);
+
+ memcpy(&str[0], (void *)DEV_T10_WWN(dev), 28);
+
+ /* vendor */
+ for (k = 0; k < 8; k++)
+ str[k] = ISPRINT(DEV_T10_WWN(dev)->vendor[k]) ?
+ DEV_T10_WWN(dev)->vendor[k] : 0x20;
+ str[k] = 0x20;
+
+ /* model */
+ for (k = 0; k < 16; k++)
+ str[k+9] = ISPRINT(DEV_T10_WWN(dev)->model[k]) ?
+ DEV_T10_WWN(dev)->model[k] : 0x20;
+ str[k + 9] = 0;
+
+ seq_printf(seq, "dev_alias: %s\n", str);
+
+ return 0;
+}
+
+static const struct seq_operations scsi_dev_seq_ops = {
+ .start = scsi_dev_seq_start,
+ .next = scsi_dev_seq_next,
+ .stop = scsi_dev_seq_stop,
+ .show = scsi_dev_seq_show
+};
+
+static int scsi_dev_seq_open(struct inode *inode, struct file *file)
+{
+ return seq_open(file, &scsi_dev_seq_ops);
+}
+
+static const struct file_operations scsi_dev_seq_fops = {
+ .owner = THIS_MODULE,
+ .open = scsi_dev_seq_open,
+ .read = seq_read,
+ .llseek = seq_lseek,
+ .release = seq_release,
+};
+
+/*
+ * SCSI Port Table
+ */
+static void *scsi_port_seq_start(struct seq_file *seq, loff_t *pos)
+{
+ return locate_hba_start(seq, pos);
+}
+
+static void *scsi_port_seq_next(struct seq_file *seq, void *v, loff_t *pos)
+{
+ return locate_hba_next(seq, v, pos);
+}
+
+static void scsi_port_seq_stop(struct seq_file *seq, void *v)
+{
+ locate_hba_stop(seq, v);
+}
+
+static int scsi_port_seq_show(struct seq_file *seq, void *v)
+{
+ struct se_hba *hba;
+ struct se_subsystem_dev *se_dev = list_entry(v, struct se_subsystem_dev,
+ g_se_dev_list);
+ struct se_device *dev = se_dev->se_dev_ptr;
+ struct se_port *sep, *sep_tmp;
+
+ if (list_is_first(&se_dev->g_se_dev_list, &se_global->g_se_dev_list))
+ seq_puts(seq, "inst device indx role busy_count\n");
+
+ if (!(dev))
+ return 0;
+
+ hba = dev->se_hba;
+ if (!(hba)) {
+ /* Log error ? */
+ return 0;
+ }
+
+ /* FIXME: scsiPortBusyStatuses count */
+ spin_lock(&dev->se_port_lock);
+ list_for_each_entry_safe(sep, sep_tmp, &dev->dev_sep_list, sep_list) {
+ seq_printf(seq, "%u %u %u %s%u %u\n", hba->hba_index,
+ dev->dev_index, sep->sep_index, "Device",
+ dev->dev_index, 0);
+ }
+ spin_unlock(&dev->se_port_lock);
+
+ return 0;
+}
+
+static const struct seq_operations scsi_port_seq_ops = {
+ .start = scsi_port_seq_start,
+ .next = scsi_port_seq_next,
+ .stop = scsi_port_seq_stop,
+ .show = scsi_port_seq_show
+};
+
+static int scsi_port_seq_open(struct inode *inode, struct file *file)
+{
+ return seq_open(file, &scsi_port_seq_ops);
+}
+
+static const struct file_operations scsi_port_seq_fops = {
+ .owner = THIS_MODULE,
+ .open = scsi_port_seq_open,
+ .read = seq_read,
+ .llseek = seq_lseek,
+ .release = seq_release,
+};
+
+/*
+ * SCSI Transport Table
+ */
+static void *scsi_transport_seq_start(struct seq_file *seq, loff_t *pos)
+{
+ return locate_hba_start(seq, pos);
+}
+
+static void *scsi_transport_seq_next(struct seq_file *seq, void *v, loff_t *pos)
+{
+ return locate_hba_next(seq, v, pos);
+}
+
+static void scsi_transport_seq_stop(struct seq_file *seq, void *v)
+{
+ locate_hba_stop(seq, v);
+}
+
+static int scsi_transport_seq_show(struct seq_file *seq, void *v)
+{
+ struct se_hba *hba;
+ struct se_subsystem_dev *se_dev = list_entry(v, struct se_subsystem_dev,
+ g_se_dev_list);
+ struct se_device *dev = se_dev->se_dev_ptr;
+ struct se_port *se, *se_tmp;
+ struct se_portal_group *tpg;
+ struct t10_wwn *wwn;
+ char buf[64];
+
+ if (list_is_first(&se_dev->g_se_dev_list, &se_global->g_se_dev_list))
+ seq_puts(seq, "inst device indx dev_name\n");
+
+ if (!(dev))
+ return 0;
+
+ hba = dev->se_hba;
+ if (!(hba)) {
+ /* Log error ? */
+ return 0;
+ }
+
+ wwn = DEV_T10_WWN(dev);
+
+ spin_lock(&dev->se_port_lock);
+ list_for_each_entry_safe(se, se_tmp, &dev->dev_sep_list, sep_list) {
+ tpg = se->sep_tpg;
+ sprintf(buf, "scsiTransport%s",
+ TPG_TFO(tpg)->get_fabric_name());
+
+ seq_printf(seq, "%u %s %u %s+%s\n",
+ hba->hba_index, /* scsiTransportIndex */
+ buf, /* scsiTransportType */
+ (TPG_TFO(tpg)->tpg_get_inst_index != NULL) ?
+ TPG_TFO(tpg)->tpg_get_inst_index(tpg) :
+ 0,
+ TPG_TFO(tpg)->tpg_get_wwn(tpg),
+ (strlen(wwn->unit_serial)) ?
+ /* scsiTransportDevName */
+ wwn->unit_serial : wwn->vendor);
+ }
+ spin_unlock(&dev->se_port_lock);
+
+ return 0;
+}
+
+static const struct seq_operations scsi_transport_seq_ops = {
+ .start = scsi_transport_seq_start,
+ .next = scsi_transport_seq_next,
+ .stop = scsi_transport_seq_stop,
+ .show = scsi_transport_seq_show
+};
+
+static int scsi_transport_seq_open(struct inode *inode, struct file *file)
+{
+ return seq_open(file, &scsi_transport_seq_ops);
+}
+
+static const struct file_operations scsi_transport_seq_fops = {
+ .owner = THIS_MODULE,
+ .open = scsi_transport_seq_open,
+ .read = seq_read,
+ .llseek = seq_lseek,
+ .release = seq_release,
+};
+
+/*
+ * SCSI Target Device Table
+ */
+static void *scsi_tgt_dev_seq_start(struct seq_file *seq, loff_t *pos)
+{
+ return locate_hba_start(seq, pos);
+}
+
+static void *scsi_tgt_dev_seq_next(struct seq_file *seq, void *v, loff_t *pos)
+{
+ return locate_hba_next(seq, v, pos);
+}
+
+static void scsi_tgt_dev_seq_stop(struct seq_file *seq, void *v)
+{
+ locate_hba_stop(seq, v);
+}
+
+
+#define LU_COUNT 1 /* for now */
+static int scsi_tgt_dev_seq_show(struct seq_file *seq, void *v)
+{
+ struct se_hba *hba;
+ struct se_subsystem_dev *se_dev = list_entry(v, struct se_subsystem_dev,
+ g_se_dev_list);
+ struct se_device *dev = se_dev->se_dev_ptr;
+ int non_accessible_lus = 0;
+ char status[16];
+
+ if (list_is_first(&se_dev->g_se_dev_list, &se_global->g_se_dev_list))
+ seq_puts(seq, "inst indx num_LUs status non_access_LUs"
+ " resets\n");
+
+ if (!(dev))
+ return 0;
+
+ hba = dev->se_hba;
+ if (!(hba)) {
+ /* Log error ? */
+ return 0;
+ }
+
+ switch (dev->dev_status) {
+ case TRANSPORT_DEVICE_ACTIVATED:
+ strcpy(status, "activated");
+ break;
+ case TRANSPORT_DEVICE_DEACTIVATED:
+ strcpy(status, "deactivated");
+ non_accessible_lus = 1;
+ break;
+ case TRANSPORT_DEVICE_SHUTDOWN:
+ strcpy(status, "shutdown");
+ non_accessible_lus = 1;
+ break;
+ case TRANSPORT_DEVICE_OFFLINE_ACTIVATED:
+ case TRANSPORT_DEVICE_OFFLINE_DEACTIVATED:
+ strcpy(status, "offline");
+ non_accessible_lus = 1;
+ break;
+ default:
+ sprintf(status, "unknown(%d)", dev->dev_status);
+ non_accessible_lus = 1;
+ }
+
+ seq_printf(seq, "%u %u %u %s %u %u\n",
+ hba->hba_index, dev->dev_index, LU_COUNT,
+ status, non_accessible_lus, dev->num_resets);
+
+ return 0;
+}
+
+static const struct seq_operations scsi_tgt_dev_seq_ops = {
+ .start = scsi_tgt_dev_seq_start,
+ .next = scsi_tgt_dev_seq_next,
+ .stop = scsi_tgt_dev_seq_stop,
+ .show = scsi_tgt_dev_seq_show
+};
+
+static int scsi_tgt_dev_seq_open(struct inode *inode, struct file *file)
+{
+ return seq_open(file, &scsi_tgt_dev_seq_ops);
+}
+
+static const struct file_operations scsi_tgt_dev_seq_fops = {
+ .owner = THIS_MODULE,
+ .open = scsi_tgt_dev_seq_open,
+ .read = seq_read,
+ .llseek = seq_lseek,
+ .release = seq_release,
+};
+
+/*
+ * SCSI Target Port Table
+ */
+static void *scsi_tgt_port_seq_start(struct seq_file *seq, loff_t *pos)
+{
+ return locate_hba_start(seq, pos);
+}
+
+static void *scsi_tgt_port_seq_next(struct seq_file *seq, void *v, loff_t *pos)
+{
+ return locate_hba_next(seq, v, pos);
+}
+
+static void scsi_tgt_port_seq_stop(struct seq_file *seq, void *v)
+{
+ locate_hba_stop(seq, v);
+}
+
+static int scsi_tgt_port_seq_show(struct seq_file *seq, void *v)
+{
+ struct se_hba *hba;
+ struct se_subsystem_dev *se_dev = list_entry(v, struct se_subsystem_dev,
+ g_se_dev_list);
+ struct se_device *dev = se_dev->se_dev_ptr;
+ struct se_port *sep, *sep_tmp;
+ struct se_portal_group *tpg;
+ u32 rx_mbytes, tx_mbytes;
+ unsigned long long num_cmds;
+ char buf[64];
+
+ if (list_is_first(&se_dev->g_se_dev_list, &se_global->g_se_dev_list))
+ seq_puts(seq, "inst device indx name port_index in_cmds"
+ " write_mbytes read_mbytes hs_in_cmds\n");
+
+ if (!(dev))
+ return 0;
+
+ hba = dev->se_hba;
+ if (!(hba)) {
+ /* Log error ? */
+ return 0;
+ }
+
+ spin_lock(&dev->se_port_lock);
+ list_for_each_entry_safe(sep, sep_tmp, &dev->dev_sep_list, sep_list) {
+ tpg = sep->sep_tpg;
+ sprintf(buf, "%sPort#",
+ TPG_TFO(tpg)->get_fabric_name());
+
+ seq_printf(seq, "%u %u %u %s%d %s%s%d ",
+ hba->hba_index,
+ dev->dev_index,
+ sep->sep_index,
+ buf, sep->sep_index,
+ TPG_TFO(tpg)->tpg_get_wwn(tpg), "+t+",
+ TPG_TFO(tpg)->tpg_get_tag(tpg));
+
+ spin_lock(&sep->sep_lun->lun_sep_lock);
+ num_cmds = sep->sep_stats.cmd_pdus;
+ rx_mbytes = (sep->sep_stats.rx_data_octets >> 20);
+ tx_mbytes = (sep->sep_stats.tx_data_octets >> 20);
+ spin_unlock(&sep->sep_lun->lun_sep_lock);
+
+ seq_printf(seq, "%llu %u %u %u\n", num_cmds,
+ rx_mbytes, tx_mbytes, 0);
+ }
+ spin_unlock(&dev->se_port_lock);
+
+ return 0;
+}
+
+static const struct seq_operations scsi_tgt_port_seq_ops = {
+ .start = scsi_tgt_port_seq_start,
+ .next = scsi_tgt_port_seq_next,
+ .stop = scsi_tgt_port_seq_stop,
+ .show = scsi_tgt_port_seq_show
+};
+
+static int scsi_tgt_port_seq_open(struct inode *inode, struct file *file)
+{
+ return seq_open(file, &scsi_tgt_port_seq_ops);
+}
+
+static const struct file_operations scsi_tgt_port_seq_fops = {
+ .owner = THIS_MODULE,
+ .open = scsi_tgt_port_seq_open,
+ .read = seq_read,
+ .llseek = seq_lseek,
+ .release = seq_release,
+};
+
+/*
+ * SCSI Authorized Initiator Table:
+ * It contains the SCSI Initiators authorized to be attached to one of the
+ * local Target ports.
+ * Iterates through all active TPGs and extracts the info from the ACLs
+ */
+static void *scsi_auth_intr_seq_start(struct seq_file *seq, loff_t *pos)
+{
+ spin_lock_bh(&se_global->se_tpg_lock);
+ return seq_list_start(&se_global->g_se_tpg_list, *pos);
+}
+
+static void *scsi_auth_intr_seq_next(struct seq_file *seq, void *v,
+ loff_t *pos)
+{
+ return seq_list_next(v, &se_global->g_se_tpg_list, pos);
+}
+
+static void scsi_auth_intr_seq_stop(struct seq_file *seq, void *v)
+{
+ spin_unlock_bh(&se_global->se_tpg_lock);
+}
+
+static int scsi_auth_intr_seq_show(struct seq_file *seq, void *v)
+{
+ struct se_portal_group *se_tpg = list_entry(v, struct se_portal_group,
+ se_tpg_list);
+ struct se_dev_entry *deve;
+ struct se_lun *lun;
+ struct se_node_acl *se_nacl;
+ int j;
+
+ if (list_is_first(&se_tpg->se_tpg_list,
+ &se_global->g_se_tpg_list))
+ seq_puts(seq, "inst dev port indx dev_or_port intr_name "
+ "map_indx att_count num_cmds read_mbytes "
+ "write_mbytes hs_num_cmds creation_time row_status\n");
+
+ if (!(se_tpg))
+ return 0;
+
+ spin_lock(&se_tpg->acl_node_lock);
+ list_for_each_entry(se_nacl, &se_tpg->acl_node_list, acl_list) {
+
+ atomic_inc(&se_nacl->mib_ref_count);
+ smp_mb__after_atomic_inc();
+ spin_unlock(&se_tpg->acl_node_lock);
+
+ spin_lock_irq(&se_nacl->device_list_lock);
+ for (j = 0; j < TRANSPORT_MAX_LUNS_PER_TPG; j++) {
+ deve = &se_nacl->device_list[j];
+ if (!(deve->lun_flags &
+ TRANSPORT_LUNFLAGS_INITIATOR_ACCESS) ||
+ (!deve->se_lun))
+ continue;
+ lun = deve->se_lun;
+ if (!lun->lun_se_dev)
+ continue;
+
+ seq_printf(seq, "%u %u %u %u %u %s %u %u %u %u %u %u"
+ " %u %s\n",
+ /* scsiInstIndex */
+ (TPG_TFO(se_tpg)->tpg_get_inst_index != NULL) ?
+ TPG_TFO(se_tpg)->tpg_get_inst_index(se_tpg) :
+ 0,
+ /* scsiDeviceIndex */
+ lun->lun_se_dev->dev_index,
+ /* scsiAuthIntrTgtPortIndex */
+ TPG_TFO(se_tpg)->tpg_get_tag(se_tpg),
+ /* scsiAuthIntrIndex */
+ se_nacl->acl_index,
+ /* scsiAuthIntrDevOrPort */
+ 1,
+ /* scsiAuthIntrName */
+ se_nacl->initiatorname[0] ?
+ se_nacl->initiatorname : NONE,
+ /* FIXME: scsiAuthIntrLunMapIndex */
+ 0,
+ /* scsiAuthIntrAttachedTimes */
+ deve->attach_count,
+ /* scsiAuthIntrOutCommands */
+ deve->total_cmds,
+ /* scsiAuthIntrReadMegaBytes */
+ (u32)(deve->read_bytes >> 20),
+ /* scsiAuthIntrWrittenMegaBytes */
+ (u32)(deve->write_bytes >> 20),
+ /* FIXME: scsiAuthIntrHSOutCommands */
+ 0,
+ /* scsiAuthIntrLastCreation */
+ (u32)(((u32)deve->creation_time -
+ INITIAL_JIFFIES) * 100 / HZ),
+ /* FIXME: scsiAuthIntrRowStatus */
+ "Ready");
+ }
+ spin_unlock_irq(&se_nacl->device_list_lock);
+
+ spin_lock(&se_tpg->acl_node_lock);
+ atomic_dec(&se_nacl->mib_ref_count);
+ smp_mb__after_atomic_dec();
+ }
+ spin_unlock(&se_tpg->acl_node_lock);
+
+ return 0;
+}
+
+static const struct seq_operations scsi_auth_intr_seq_ops = {
+ .start = scsi_auth_intr_seq_start,
+ .next = scsi_auth_intr_seq_next,
+ .stop = scsi_auth_intr_seq_stop,
+ .show = scsi_auth_intr_seq_show
+};
+
+static int scsi_auth_intr_seq_open(struct inode *inode, struct file *file)
+{
+ return seq_open(file, &scsi_auth_intr_seq_ops);
+}
+
+static const struct file_operations scsi_auth_intr_seq_fops = {
+ .owner = THIS_MODULE,
+ .open = scsi_auth_intr_seq_open,
+ .read = seq_read,
+ .llseek = seq_lseek,
+ .release = seq_release,
+};
+
+/*
+ * SCSI Attached Initiator Port Table:
+ * It lists the SCSI Initiators attached to one of the local Target ports.
+ * Iterates through all active TPGs and use active sessions from each TPG
+ * to list the info fo this table.
+ */
+static void *scsi_att_intr_port_seq_start(struct seq_file *seq, loff_t *pos)
+{
+ spin_lock_bh(&se_global->se_tpg_lock);
+ return seq_list_start(&se_global->g_se_tpg_list, *pos);
+}
+
+static void *scsi_att_intr_port_seq_next(struct seq_file *seq, void *v,
+ loff_t *pos)
+{
+ return seq_list_next(v, &se_global->g_se_tpg_list, pos);
+}
+
+static void scsi_att_intr_port_seq_stop(struct seq_file *seq, void *v)
+{
+ spin_unlock_bh(&se_global->se_tpg_lock);
+}
+
+static int scsi_att_intr_port_seq_show(struct seq_file *seq, void *v)
+{
+ struct se_portal_group *se_tpg = list_entry(v, struct se_portal_group,
+ se_tpg_list);
+ struct se_dev_entry *deve;
+ struct se_lun *lun;
+ struct se_node_acl *se_nacl;
+ struct se_session *se_sess;
+ unsigned char buf[64];
+ int j;
+
+ if (list_is_first(&se_tpg->se_tpg_list,
+ &se_global->g_se_tpg_list))
+ seq_puts(seq, "inst dev port indx port_auth_indx port_name"
+ " port_ident\n");
+
+ if (!(se_tpg))
+ return 0;
+
+ spin_lock(&se_tpg->session_lock);
+ list_for_each_entry(se_sess, &se_tpg->tpg_sess_list, sess_list) {
+ if ((TPG_TFO(se_tpg)->sess_logged_in(se_sess)) ||
+ (!se_sess->se_node_acl) ||
+ (!se_sess->se_node_acl->device_list))
+ continue;
+
+ atomic_inc(&se_sess->mib_ref_count);
+ smp_mb__after_atomic_inc();
+ se_nacl = se_sess->se_node_acl;
+ atomic_inc(&se_nacl->mib_ref_count);
+ smp_mb__after_atomic_inc();
+ spin_unlock(&se_tpg->session_lock);
+
+ spin_lock_irq(&se_nacl->device_list_lock);
+ for (j = 0; j < TRANSPORT_MAX_LUNS_PER_TPG; j++) {
+ deve = &se_nacl->device_list[j];
+ if (!(deve->lun_flags &
+ TRANSPORT_LUNFLAGS_INITIATOR_ACCESS) ||
+ (!deve->se_lun))
+ continue;
+
+ lun = deve->se_lun;
+ if (!lun->lun_se_dev)
+ continue;
+
+ memset(buf, 0, 64);
+ if (TPG_TFO(se_tpg)->sess_get_initiator_sid != NULL)
+ TPG_TFO(se_tpg)->sess_get_initiator_sid(
+ se_sess, (unsigned char *)&buf[0], 64);
+
+ seq_printf(seq, "%u %u %u %u %u %s+i+%s\n",
+ /* scsiInstIndex */
+ (TPG_TFO(se_tpg)->tpg_get_inst_index != NULL) ?
+ TPG_TFO(se_tpg)->tpg_get_inst_index(se_tpg) :
+ 0,
+ /* scsiDeviceIndex */
+ lun->lun_se_dev->dev_index,
+ /* scsiPortIndex */
+ TPG_TFO(se_tpg)->tpg_get_tag(se_tpg),
+ /* scsiAttIntrPortIndex */
+ (TPG_TFO(se_tpg)->sess_get_index != NULL) ?
+ TPG_TFO(se_tpg)->sess_get_index(se_sess) :
+ 0,
+ /* scsiAttIntrPortAuthIntrIdx */
+ se_nacl->acl_index,
+ /* scsiAttIntrPortName */
+ se_nacl->initiatorname[0] ?
+ se_nacl->initiatorname : NONE,
+ /* scsiAttIntrPortIdentifier */
+ buf);
+ }
+ spin_unlock_irq(&se_nacl->device_list_lock);
+
+ spin_lock(&se_tpg->session_lock);
+ atomic_dec(&se_nacl->mib_ref_count);
+ smp_mb__after_atomic_dec();
+ atomic_dec(&se_sess->mib_ref_count);
+ smp_mb__after_atomic_dec();
+ }
+ spin_unlock(&se_tpg->session_lock);
+
+ return 0;
+}
+
+static const struct seq_operations scsi_att_intr_port_seq_ops = {
+ .start = scsi_att_intr_port_seq_start,
+ .next = scsi_att_intr_port_seq_next,
+ .stop = scsi_att_intr_port_seq_stop,
+ .show = scsi_att_intr_port_seq_show
+};
+
+static int scsi_att_intr_port_seq_open(struct inode *inode, struct file *file)
+{
+ return seq_open(file, &scsi_att_intr_port_seq_ops);
+}
+
+static const struct file_operations scsi_att_intr_port_seq_fops = {
+ .owner = THIS_MODULE,
+ .open = scsi_att_intr_port_seq_open,
+ .read = seq_read,
+ .llseek = seq_lseek,
+ .release = seq_release,
+};
+
+/*
+ * SCSI Logical Unit Table
+ */
+static void *scsi_lu_seq_start(struct seq_file *seq, loff_t *pos)
+{
+ return locate_hba_start(seq, pos);
+}
+
+static void *scsi_lu_seq_next(struct seq_file *seq, void *v, loff_t *pos)
+{
+ return locate_hba_next(seq, v, pos);
+}
+
+static void scsi_lu_seq_stop(struct seq_file *seq, void *v)
+{
+ locate_hba_stop(seq, v);
+}
+
+#define SCSI_LU_INDEX 1
+static int scsi_lu_seq_show(struct seq_file *seq, void *v)
+{
+ struct se_hba *hba;
+ struct se_subsystem_dev *se_dev = list_entry(v, struct se_subsystem_dev,
+ g_se_dev_list);
+ struct se_device *dev = se_dev->se_dev_ptr;
+ int j;
+ char str[28];
+
+ if (list_is_first(&se_dev->g_se_dev_list, &se_global->g_se_dev_list))
+ seq_puts(seq, "inst dev indx LUN lu_name vend prod rev"
+ " dev_type status state-bit num_cmds read_mbytes"
+ " write_mbytes resets full_stat hs_num_cmds creation_time\n");
+
+ if (!(dev))
+ return 0;
+
+ hba = dev->se_hba;
+ if (!(hba)) {
+ /* Log error ? */
+ return 0;
+ }
+
+ /* Fix LU state, if we can read it from the device */
+ seq_printf(seq, "%u %u %u %llu %s", hba->hba_index,
+ dev->dev_index, SCSI_LU_INDEX,
+ (unsigned long long)0, /* FIXME: scsiLuDefaultLun */
+ (strlen(DEV_T10_WWN(dev)->unit_serial)) ?
+ /* scsiLuWwnName */
+ (char *)&DEV_T10_WWN(dev)->unit_serial[0] :
+ "None");
+
+ memcpy(&str[0], (void *)DEV_T10_WWN(dev), 28);
+ /* scsiLuVendorId */
+ for (j = 0; j < 8; j++)
+ str[j] = ISPRINT(DEV_T10_WWN(dev)->vendor[j]) ?
+ DEV_T10_WWN(dev)->vendor[j] : 0x20;
+ str[8] = 0;
+ seq_printf(seq, " %s", str);
+
+ /* scsiLuProductId */
+ for (j = 0; j < 16; j++)
+ str[j] = ISPRINT(DEV_T10_WWN(dev)->model[j]) ?
+ DEV_T10_WWN(dev)->model[j] : 0x20;
+ str[16] = 0;
+ seq_printf(seq, " %s", str);
+
+ /* scsiLuRevisionId */
+ for (j = 0; j < 4; j++)
+ str[j] = ISPRINT(DEV_T10_WWN(dev)->revision[j]) ?
+ DEV_T10_WWN(dev)->revision[j] : 0x20;
+ str[4] = 0;
+ seq_printf(seq, " %s", str);
+
+ seq_printf(seq, " %u %s %s %llu %u %u %u %u %u %u\n",
+ /* scsiLuPeripheralType */
+ TRANSPORT(dev)->get_device_type(dev),
+ (dev->dev_status == TRANSPORT_DEVICE_ACTIVATED) ?
+ "available" : "notavailable", /* scsiLuStatus */
+ "exposed", /* scsiLuState */
+ (unsigned long long)dev->num_cmds,
+ /* scsiLuReadMegaBytes */
+ (u32)(dev->read_bytes >> 20),
+ /* scsiLuWrittenMegaBytes */
+ (u32)(dev->write_bytes >> 20),
+ dev->num_resets, /* scsiLuInResets */
+ 0, /* scsiLuOutTaskSetFullStatus */
+ 0, /* scsiLuHSInCommands */
+ (u32)(((u32)dev->creation_time - INITIAL_JIFFIES) *
+ 100 / HZ));
+
+ return 0;
+}
+
+static const struct seq_operations scsi_lu_seq_ops = {
+ .start = scsi_lu_seq_start,
+ .next = scsi_lu_seq_next,
+ .stop = scsi_lu_seq_stop,
+ .show = scsi_lu_seq_show
+};
+
+static int scsi_lu_seq_open(struct inode *inode, struct file *file)
+{
+ return seq_open(file, &scsi_lu_seq_ops);
+}
+
+static const struct file_operations scsi_lu_seq_fops = {
+ .owner = THIS_MODULE,
+ .open = scsi_lu_seq_open,
+ .read = seq_read,
+ .llseek = seq_lseek,
+ .release = seq_release,
+};
+
+/****************************************************************************/
+
+/*
+ * Remove proc fs entries
+ */
+void remove_scsi_target_mib(void)
+{
+ remove_proc_entry("scsi_target/mib/scsi_inst", NULL);
+ remove_proc_entry("scsi_target/mib/scsi_dev", NULL);
+ remove_proc_entry("scsi_target/mib/scsi_port", NULL);
+ remove_proc_entry("scsi_target/mib/scsi_transport", NULL);
+ remove_proc_entry("scsi_target/mib/scsi_tgt_dev", NULL);
+ remove_proc_entry("scsi_target/mib/scsi_tgt_port", NULL);
+ remove_proc_entry("scsi_target/mib/scsi_auth_intr", NULL);
+ remove_proc_entry("scsi_target/mib/scsi_att_intr_port", NULL);
+ remove_proc_entry("scsi_target/mib/scsi_lu", NULL);
+ remove_proc_entry("scsi_target/mib", NULL);
+}
+
+/*
+ * Create proc fs entries for the mib tables
+ */
+int init_scsi_target_mib(void)
+{
+ struct proc_dir_entry *dir_entry;
+ struct proc_dir_entry *scsi_inst_entry;
+ struct proc_dir_entry *scsi_dev_entry;
+ struct proc_dir_entry *scsi_port_entry;
+ struct proc_dir_entry *scsi_transport_entry;
+ struct proc_dir_entry *scsi_tgt_dev_entry;
+ struct proc_dir_entry *scsi_tgt_port_entry;
+ struct proc_dir_entry *scsi_auth_intr_entry;
+ struct proc_dir_entry *scsi_att_intr_port_entry;
+ struct proc_dir_entry *scsi_lu_entry;
+
+ dir_entry = proc_mkdir("scsi_target/mib", NULL);
+ if (!(dir_entry)) {
+ printk(KERN_ERR "proc_mkdir() failed.\n");
+ return -1;
+ }
+
+ scsi_inst_entry =
+ create_proc_entry("scsi_target/mib/scsi_inst", 0, NULL);
+ if (scsi_inst_entry)
+ scsi_inst_entry->proc_fops = &scsi_inst_seq_fops;
+ else
+ goto error;
+
+ scsi_dev_entry =
+ create_proc_entry("scsi_target/mib/scsi_dev", 0, NULL);
+ if (scsi_dev_entry)
+ scsi_dev_entry->proc_fops = &scsi_dev_seq_fops;
+ else
+ goto error;
+
+ scsi_port_entry =
+ create_proc_entry("scsi_target/mib/scsi_port", 0, NULL);
+ if (scsi_port_entry)
+ scsi_port_entry->proc_fops = &scsi_port_seq_fops;
+ else
+ goto error;
+
+ scsi_transport_entry =
+ create_proc_entry("scsi_target/mib/scsi_transport", 0, NULL);
+ if (scsi_transport_entry)
+ scsi_transport_entry->proc_fops = &scsi_transport_seq_fops;
+ else
+ goto error;
+
+ scsi_tgt_dev_entry =
+ create_proc_entry("scsi_target/mib/scsi_tgt_dev", 0, NULL);
+ if (scsi_tgt_dev_entry)
+ scsi_tgt_dev_entry->proc_fops = &scsi_tgt_dev_seq_fops;
+ else
+ goto error;
+
+ scsi_tgt_port_entry =
+ create_proc_entry("scsi_target/mib/scsi_tgt_port", 0, NULL);
+ if (scsi_tgt_port_entry)
+ scsi_tgt_port_entry->proc_fops = &scsi_tgt_port_seq_fops;
+ else
+ goto error;
+
+ scsi_auth_intr_entry =
+ create_proc_entry("scsi_target/mib/scsi_auth_intr", 0, NULL);
+ if (scsi_auth_intr_entry)
+ scsi_auth_intr_entry->proc_fops = &scsi_auth_intr_seq_fops;
+ else
+ goto error;
+
+ scsi_att_intr_port_entry =
+ create_proc_entry("scsi_target/mib/scsi_att_intr_port", 0, NULL);
+ if (scsi_att_intr_port_entry)
+ scsi_att_intr_port_entry->proc_fops =
+ &scsi_att_intr_port_seq_fops;
+ else
+ goto error;
+
+ scsi_lu_entry = create_proc_entry("scsi_target/mib/scsi_lu", 0, NULL);
+ if (scsi_lu_entry)
+ scsi_lu_entry->proc_fops = &scsi_lu_seq_fops;
+ else
+ goto error;
+
+ return 0;
+
+error:
+ printk(KERN_ERR "create_proc_entry() failed.\n");
+ remove_scsi_target_mib();
+ return -1;
+}
+
+/*
+ * Initialize the index table for allocating unique row indexes to various mib
+ * tables
+ */
+void init_scsi_index_table(void)
+{
+ memset(&scsi_index_table, 0, sizeof(struct scsi_index_table));
+ spin_lock_init(&scsi_index_table.lock);
+}
+
+/*
+ * Allocate a new row index for the entry type specified
+ */
+u32 scsi_get_new_index(scsi_index_t type)
+{
+ u32 new_index;
+
+ if ((type < 0) || (type >= SCSI_INDEX_TYPE_MAX)) {
+ printk(KERN_ERR "Invalid index type %d\n", type);
+ return -1;
+ }
+
+ spin_lock(&scsi_index_table.lock);
+ new_index = ++scsi_index_table.scsi_mib_index[type];
+ if (new_index == 0)
+ new_index = ++scsi_index_table.scsi_mib_index[type];
+ spin_unlock(&scsi_index_table.lock);
+
+ return new_index;
+}
+EXPORT_SYMBOL(scsi_get_new_index);
diff --git a/drivers/target/target_core_mib.h b/drivers/target/target_core_mib.h
new file mode 100644
index 0000000..2772046
--- /dev/null
+++ b/drivers/target/target_core_mib.h
@@ -0,0 +1,28 @@
+#ifndef TARGET_CORE_MIB_H
+#define TARGET_CORE_MIB_H
+
+typedef enum {
+ SCSI_INST_INDEX,
+ SCSI_DEVICE_INDEX,
+ SCSI_AUTH_INTR_INDEX,
+ SCSI_INDEX_TYPE_MAX
+} scsi_index_t;
+
+struct scsi_index_table {
+ spinlock_t lock;
+ u32 scsi_mib_index[SCSI_INDEX_TYPE_MAX];
+} ____cacheline_aligned;
+
+/* SCSI Port stats */
+struct scsi_port_stats {
+ u64 cmd_pdus;
+ u64 tx_data_octets;
+ u64 rx_data_octets;
+} ____cacheline_aligned;
+
+extern int init_scsi_target_mib(void);
+extern void remove_scsi_target_mib(void);
+extern void init_scsi_index_table(void);
+extern u32 scsi_get_new_index(scsi_index_t);
+
+#endif /*** TARGET_CORE_MIB_H ***/
--
1.7.3.4
^ permalink raw reply related [flat|nested] 22+ messages in thread* [PATCH v2 02m/03] target: Add FILEIO subsystem plugin
2010-12-17 21:11 [PATCH v2 00/03] target: Initial merge of v4.0.0-rc6 for .38 Nicholas A. Bellinger
` (12 preceding siblings ...)
2010-12-17 21:11 ` [PATCH v2 02l/03] target: Add SCSI MIB statistics support Nicholas A. Bellinger
@ 2010-12-17 21:11 ` Nicholas A. Bellinger
2010-12-17 21:11 ` [PATCH v2 02n/03] target: Add IBLOCK " Nicholas A. Bellinger
` (6 subsequent siblings)
20 siblings, 0 replies; 22+ messages in thread
From: Nicholas A. Bellinger @ 2010-12-17 21:11 UTC (permalink / raw)
To: linux-scsi, James Bottomley; +Cc: Nicholas Bellinger
From: Nicholas Bellinger <nab@linux-iscsi.org>
This patch adds the O_SYNC FILEIO subsystem plugin for accessing struct file
using Linux/VFS struct file_operations. It also includes WriteCache and FUA
Write Emulation support to struct file using fs/sync.c/vfs_fsync_range()
Signed-off-by: Nicholas A. Bellinger <nab@linux-iscsi.org>
---
drivers/target/target_core_file.c | 688 +++++++++++++++++++++++++++++++++++++
drivers/target/target_core_file.h | 50 +++
2 files changed, 738 insertions(+), 0 deletions(-)
create mode 100644 drivers/target/target_core_file.c
create mode 100644 drivers/target/target_core_file.h
diff --git a/drivers/target/target_core_file.c b/drivers/target/target_core_file.c
new file mode 100644
index 0000000..0aaca88
--- /dev/null
+++ b/drivers/target/target_core_file.c
@@ -0,0 +1,688 @@
+/*******************************************************************************
+ * Filename: target_core_file.c
+ *
+ * This file contains the Storage Engine <-> FILEIO transport specific functions
+ *
+ * Copyright (c) 2005 PyX Technologies, Inc.
+ * Copyright (c) 2005-2006 SBE, Inc. All Rights Reserved.
+ * Copyright (c) 2007-2010 Rising Tide Systems
+ * Copyright (c) 2008-2010 Linux-iSCSI.org
+ *
+ * Nicholas A. Bellinger <nab@kernel.org>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+ *
+ ******************************************************************************/
+
+#include <linux/version.h>
+#include <linux/string.h>
+#include <linux/parser.h>
+#include <linux/timer.h>
+#include <linux/blkdev.h>
+#include <linux/slab.h>
+#include <linux/spinlock.h>
+#include <linux/smp_lock.h>
+#include <scsi/scsi.h>
+#include <scsi/scsi_host.h>
+
+#include <target/target_core_base.h>
+#include <target/target_core_device.h>
+#include <target/target_core_transport.h>
+
+#include "target_core_file.h"
+
+#if 1
+#define DEBUG_FD_CACHE(x...) printk(x)
+#else
+#define DEBUG_FD_CACHE(x...)
+#endif
+
+#if 1
+#define DEBUG_FD_FUA(x...) printk(x)
+#else
+#define DEBUG_FD_FUA(x...)
+#endif
+
+static struct se_subsystem_api fileio_template;
+
+/* fd_attach_hba(): (Part of se_subsystem_api_t template)
+ *
+ *
+ */
+static int fd_attach_hba(struct se_hba *hba, u32 host_id)
+{
+ struct fd_host *fd_host;
+
+ fd_host = kzalloc(sizeof(struct fd_host), GFP_KERNEL);
+ if (!(fd_host)) {
+ printk(KERN_ERR "Unable to allocate memory for struct fd_host\n");
+ return -1;
+ }
+
+ fd_host->fd_host_id = host_id;
+
+ atomic_set(&hba->left_queue_depth, FD_HBA_QUEUE_DEPTH);
+ atomic_set(&hba->max_queue_depth, FD_HBA_QUEUE_DEPTH);
+ hba->hba_ptr = (void *) fd_host;
+
+ printk(KERN_INFO "CORE_HBA[%d] - TCM FILEIO HBA Driver %s on Generic"
+ " Target Core Stack %s\n", hba->hba_id, FD_VERSION,
+ TARGET_CORE_MOD_VERSION);
+ printk(KERN_INFO "CORE_HBA[%d] - Attached FILEIO HBA: %u to Generic"
+ " Target Core with TCQ Depth: %d MaxSectors: %u\n",
+ hba->hba_id, fd_host->fd_host_id,
+ atomic_read(&hba->max_queue_depth), FD_MAX_SECTORS);
+
+ return 0;
+}
+
+static void fd_detach_hba(struct se_hba *hba)
+{
+ struct fd_host *fd_host = hba->hba_ptr;
+
+ printk(KERN_INFO "CORE_HBA[%d] - Detached FILEIO HBA: %u from Generic"
+ " Target Core\n", hba->hba_id, fd_host->fd_host_id);
+
+ kfree(fd_host);
+ hba->hba_ptr = NULL;
+}
+
+static void *fd_allocate_virtdevice(struct se_hba *hba, const char *name)
+{
+ struct fd_dev *fd_dev;
+ struct fd_host *fd_host = (struct fd_host *) hba->hba_ptr;
+
+ fd_dev = kzalloc(sizeof(struct fd_dev), GFP_KERNEL);
+ if (!(fd_dev)) {
+ printk(KERN_ERR "Unable to allocate memory for struct fd_dev\n");
+ return NULL;
+ }
+
+ fd_dev->fd_host = fd_host;
+
+ printk(KERN_INFO "FILEIO: Allocated fd_dev for %p\n", name);
+
+ return fd_dev;
+}
+
+/* fd_create_virtdevice(): (Part of se_subsystem_api_t template)
+ *
+ *
+ */
+static struct se_device *fd_create_virtdevice(
+ struct se_hba *hba,
+ struct se_subsystem_dev *se_dev,
+ void *p)
+{
+ char *dev_p = NULL;
+ struct se_device *dev;
+ struct se_dev_limits dev_limits;
+ struct queue_limits *limits;
+ struct fd_dev *fd_dev = (struct fd_dev *) p;
+ struct fd_host *fd_host = (struct fd_host *) hba->hba_ptr;
+ mm_segment_t old_fs;
+ struct file *file;
+ struct inode *inode = NULL;
+ int dev_flags = 0, flags;
+
+ memset(&dev_limits, 0, sizeof(struct se_dev_limits));
+
+ old_fs = get_fs();
+ set_fs(get_ds());
+ dev_p = getname(fd_dev->fd_dev_name);
+ set_fs(old_fs);
+
+ if (IS_ERR(dev_p)) {
+ printk(KERN_ERR "getname(%s) failed: %lu\n",
+ fd_dev->fd_dev_name, IS_ERR(dev_p));
+ goto fail;
+ }
+#if 0
+ if (di->no_create_file)
+ flags = O_RDWR | O_LARGEFILE;
+ else
+ flags = O_RDWR | O_CREAT | O_LARGEFILE;
+#else
+ flags = O_RDWR | O_CREAT | O_LARGEFILE;
+#endif
+/* flags |= O_DIRECT; */
+ /*
+ * If fd_buffered_io=1 has not been set explictly (the default),
+ * use O_SYNC to force FILEIO writes to disk.
+ */
+ if (!(fd_dev->fbd_flags & FDBD_USE_BUFFERED_IO))
+ flags |= O_SYNC;
+
+ file = filp_open(dev_p, flags, 0600);
+
+ if (IS_ERR(file) || !file || !file->f_dentry) {
+ printk(KERN_ERR "filp_open(%s) failed\n", dev_p);
+ goto fail;
+ }
+ fd_dev->fd_file = file;
+ /*
+ * If using a block backend with this struct file, we extract
+ * fd_dev->fd_[block,dev]_size from struct block_device.
+ *
+ * Otherwise, we use the passed fd_size= from configfs
+ */
+ inode = file->f_mapping->host;
+ if (S_ISBLK(inode->i_mode)) {
+ struct request_queue *q;
+ /*
+ * Setup the local scope queue_limits from struct request_queue->limits
+ * to pass into transport_add_device_to_core_hba() as struct se_dev_limits.
+ */
+ q = bdev_get_queue(inode->i_bdev);
+ limits = &dev_limits.limits;
+ limits->logical_block_size = bdev_logical_block_size(inode->i_bdev);
+ limits->max_hw_sectors = queue_max_hw_sectors(q);
+ limits->max_sectors = queue_max_sectors(q);
+ /*
+ * Determine the number of bytes from i_size_read() minus
+ * one (1) logical sector from underlying struct block_device
+ */
+ fd_dev->fd_block_size = bdev_logical_block_size(inode->i_bdev);
+ fd_dev->fd_dev_size = (i_size_read(file->f_mapping->host) -
+ fd_dev->fd_block_size);
+
+ printk(KERN_INFO "FILEIO: Using size: %llu bytes from struct"
+ " block_device blocks: %llu logical_block_size: %d\n",
+ fd_dev->fd_dev_size,
+ div_u64(fd_dev->fd_dev_size, fd_dev->fd_block_size),
+ fd_dev->fd_block_size);
+ } else {
+ if (!(fd_dev->fbd_flags & FBDF_HAS_SIZE)) {
+ printk(KERN_ERR "FILEIO: Missing fd_dev_size="
+ " parameter, and no backing struct"
+ " block_device\n");
+ goto fail;
+ }
+
+ limits = &dev_limits.limits;
+ limits->logical_block_size = FD_BLOCKSIZE;
+ limits->max_hw_sectors = FD_MAX_SECTORS;
+ limits->max_sectors = FD_MAX_SECTORS;
+ fd_dev->fd_block_size = FD_BLOCKSIZE;
+ }
+
+ dev_limits.hw_queue_depth = FD_MAX_DEVICE_QUEUE_DEPTH;
+ dev_limits.queue_depth = FD_DEVICE_QUEUE_DEPTH;
+
+ dev = transport_add_device_to_core_hba(hba, &fileio_template,
+ se_dev, dev_flags, (void *)fd_dev,
+ &dev_limits, "FILEIO", FD_VERSION);
+ if (!(dev))
+ goto fail;
+
+ fd_dev->fd_dev_id = fd_host->fd_host_dev_id_count++;
+ fd_dev->fd_queue_depth = dev->queue_depth;
+
+ printk(KERN_INFO "CORE_FILE[%u] - Added TCM FILEIO Device ID: %u at %s,"
+ " %llu total bytes\n", fd_host->fd_host_id, fd_dev->fd_dev_id,
+ fd_dev->fd_dev_name, fd_dev->fd_dev_size);
+
+ putname(dev_p);
+ return dev;
+fail:
+ if (fd_dev->fd_file) {
+ filp_close(fd_dev->fd_file, NULL);
+ fd_dev->fd_file = NULL;
+ }
+ putname(dev_p);
+ return NULL;
+}
+
+/* fd_free_device(): (Part of se_subsystem_api_t template)
+ *
+ *
+ */
+static void fd_free_device(void *p)
+{
+ struct fd_dev *fd_dev = (struct fd_dev *) p;
+
+ if (fd_dev->fd_file) {
+ filp_close(fd_dev->fd_file, NULL);
+ fd_dev->fd_file = NULL;
+ }
+
+ kfree(fd_dev);
+}
+
+static inline struct fd_request *FILE_REQ(struct se_task *task)
+{
+ return container_of(task, struct fd_request, fd_task);
+}
+
+
+static struct se_task *
+fd_alloc_task(struct se_cmd *cmd)
+{
+ struct fd_request *fd_req;
+
+ fd_req = kzalloc(sizeof(struct fd_request), GFP_KERNEL);
+ if (!(fd_req)) {
+ printk(KERN_ERR "Unable to allocate struct fd_request\n");
+ return NULL;
+ }
+
+ fd_req->fd_dev = SE_DEV(cmd)->dev_ptr;
+
+ return &fd_req->fd_task;
+}
+
+static int fd_do_readv(struct se_task *task)
+{
+ struct fd_request *req = FILE_REQ(task);
+ struct file *fd = req->fd_dev->fd_file;
+ struct scatterlist *sg = task->task_sg;
+ struct iovec *iov;
+ mm_segment_t old_fs;
+ loff_t pos = (task->task_lba * DEV_ATTRIB(task->se_dev)->block_size);
+ int ret = 0, i;
+
+ iov = kzalloc(sizeof(struct iovec) * task->task_sg_num, GFP_KERNEL);
+ if (!(iov)) {
+ printk(KERN_ERR "Unable to allocate fd_do_readv iov[]\n");
+ return -1;
+ }
+
+ for (i = 0; i < task->task_sg_num; i++) {
+ iov[i].iov_len = sg[i].length;
+ iov[i].iov_base = sg_virt(&sg[i]);
+ }
+
+ old_fs = get_fs();
+ set_fs(get_ds());
+ ret = vfs_readv(fd, &iov[0], task->task_sg_num, &pos);
+ set_fs(old_fs);
+
+ kfree(iov);
+ /*
+ * Return zeros and GOOD status even if the READ did not return
+ * the expected virt_size for struct file w/o a backing struct
+ * block_device.
+ */
+ if (S_ISBLK(fd->f_dentry->d_inode->i_mode)) {
+ if (ret < 0 || ret != task->task_size) {
+ printk(KERN_ERR "vfs_readv() returned %d,"
+ " expecting %d for S_ISBLK\n", ret,
+ (int)task->task_size);
+ return -1;
+ }
+ } else {
+ if (ret < 0) {
+ printk(KERN_ERR "vfs_readv() returned %d for non"
+ " S_ISBLK\n", ret);
+ return -1;
+ }
+ }
+
+ return 1;
+}
+
+static int fd_do_writev(struct se_task *task)
+{
+ struct fd_request *req = FILE_REQ(task);
+ struct file *fd = req->fd_dev->fd_file;
+ struct scatterlist *sg = task->task_sg;
+ struct iovec *iov;
+ mm_segment_t old_fs;
+ loff_t pos = (task->task_lba * DEV_ATTRIB(task->se_dev)->block_size);
+ int ret, i = 0;
+
+ iov = kzalloc(sizeof(struct iovec) * task->task_sg_num, GFP_KERNEL);
+ if (!(iov)) {
+ printk(KERN_ERR "Unable to allocate fd_do_writev iov[]\n");
+ return -1;
+ }
+
+ for (i = 0; i < task->task_sg_num; i++) {
+ iov[i].iov_len = sg[i].length;
+ iov[i].iov_base = sg_virt(&sg[i]);
+ }
+
+ old_fs = get_fs();
+ set_fs(get_ds());
+ ret = vfs_writev(fd, &iov[0], task->task_sg_num, &pos);
+ set_fs(old_fs);
+
+ kfree(iov);
+
+ if (ret < 0 || ret != task->task_size) {
+ printk(KERN_ERR "vfs_writev() returned %d\n", ret);
+ return -1;
+ }
+
+ return 1;
+}
+
+static void fd_emulate_sync_cache(struct se_task *task)
+{
+ struct se_cmd *cmd = TASK_CMD(task);
+ struct se_device *dev = cmd->se_dev;
+ struct fd_dev *fd_dev = dev->dev_ptr;
+ int immed = (cmd->t_task->t_task_cdb[1] & 0x2);
+ loff_t start, end;
+ int ret;
+
+ /*
+ * If the Immediate bit is set, queue up the GOOD response
+ * for this SYNCHRONIZE_CACHE op
+ */
+ if (immed)
+ transport_complete_sync_cache(cmd, 1);
+
+ /*
+ * Determine if we will be flushing the entire device.
+ */
+ if (cmd->t_task->t_task_lba == 0 && cmd->data_length == 0) {
+ start = 0;
+ end = LLONG_MAX;
+ } else {
+ start = cmd->t_task->t_task_lba * DEV_ATTRIB(dev)->block_size;
+ if (cmd->data_length)
+ end = start + cmd->data_length;
+ else
+ end = LLONG_MAX;
+ }
+
+ ret = vfs_fsync_range(fd_dev->fd_file, start, end, 1);
+ if (ret != 0)
+ printk(KERN_ERR "FILEIO: vfs_fsync_range() failed: %d\n", ret);
+
+ if (!immed)
+ transport_complete_sync_cache(cmd, ret == 0);
+}
+
+/*
+ * Tell TCM Core that we are capable of WriteCache emulation for
+ * an underlying struct se_device.
+ */
+static int fd_emulated_write_cache(struct se_device *dev)
+{
+ return 1;
+}
+
+static int fd_emulated_dpo(struct se_device *dev)
+{
+ return 0;
+}
+/*
+ * Tell TCM Core that we will be emulating Forced Unit Access (FUA) for WRITEs
+ * for TYPE_DISK.
+ */
+static int fd_emulated_fua_write(struct se_device *dev)
+{
+ return 1;
+}
+
+static int fd_emulated_fua_read(struct se_device *dev)
+{
+ return 0;
+}
+
+/*
+ * WRITE Force Unit Access (FUA) emulation on a per struct se_task
+ * LBA range basis..
+ */
+static void fd_emulate_write_fua(struct se_cmd *cmd, struct se_task *task)
+{
+ struct se_device *dev = cmd->se_dev;
+ struct fd_dev *fd_dev = dev->dev_ptr;
+ loff_t start = task->task_lba * DEV_ATTRIB(dev)->block_size;
+ loff_t end = start + task->task_size;
+ int ret;
+
+ DEBUG_FD_CACHE("FILEIO: FUA WRITE LBA: %llu, bytes: %u\n",
+ task->task_lba, task->task_size);
+
+ ret = vfs_fsync_range(fd_dev->fd_file, start, end, 1);
+ if (ret != 0)
+ printk(KERN_ERR "FILEIO: vfs_fsync_range() failed: %d\n", ret);
+}
+
+static int fd_do_task(struct se_task *task)
+{
+ struct se_cmd *cmd = task->task_se_cmd;
+ struct se_device *dev = cmd->se_dev;
+ int ret = 0;
+
+ /*
+ * Call vectorized fileio functions to map struct scatterlist
+ * physical memory addresses to struct iovec virtual memory.
+ */
+ if (task->task_data_direction == DMA_FROM_DEVICE) {
+ ret = fd_do_readv(task);
+ } else {
+ ret = fd_do_writev(task);
+
+ if (ret > 0 &&
+ DEV_ATTRIB(dev)->emulate_write_cache > 0 &&
+ DEV_ATTRIB(dev)->emulate_fua_write > 0 &&
+ T_TASK(cmd)->t_tasks_fua) {
+ /*
+ * We might need to be a bit smarter here
+ * and return some sense data to let the initiator
+ * know the FUA WRITE cache sync failed..?
+ */
+ fd_emulate_write_fua(cmd, task);
+ }
+
+ }
+
+ if (ret < 0)
+ return ret;
+ if (ret) {
+ task->task_scsi_status = GOOD;
+ transport_complete_task(task, 1);
+ }
+ return PYX_TRANSPORT_SENT_TO_TRANSPORT;
+}
+
+/* fd_free_task(): (Part of se_subsystem_api_t template)
+ *
+ *
+ */
+static void fd_free_task(struct se_task *task)
+{
+ struct fd_request *req = FILE_REQ(task);
+
+ kfree(req);
+}
+
+enum {
+ Opt_fd_dev_name, Opt_fd_dev_size, Opt_fd_buffered_io, Opt_err
+};
+
+static match_table_t tokens = {
+ {Opt_fd_dev_name, "fd_dev_name=%s"},
+ {Opt_fd_dev_size, "fd_dev_size=%s"},
+ {Opt_fd_buffered_io, "fd_buffered_id=%d"},
+ {Opt_err, NULL}
+};
+
+static ssize_t fd_set_configfs_dev_params(
+ struct se_hba *hba,
+ struct se_subsystem_dev *se_dev,
+ const char *page, ssize_t count)
+{
+ struct fd_dev *fd_dev = se_dev->se_dev_su_ptr;
+ char *orig, *ptr, *arg_p, *opts;
+ substring_t args[MAX_OPT_ARGS];
+ int ret = 0, arg, token;
+
+ opts = kstrdup(page, GFP_KERNEL);
+ if (!opts)
+ return -ENOMEM;
+
+ orig = opts;
+
+ while ((ptr = strsep(&opts, ",")) != NULL) {
+ if (!*ptr)
+ continue;
+
+ token = match_token(ptr, tokens, args);
+ switch (token) {
+ case Opt_fd_dev_name:
+ snprintf(fd_dev->fd_dev_name, FD_MAX_DEV_NAME,
+ "%s", match_strdup(&args[0]));
+ printk(KERN_INFO "FILEIO: Referencing Path: %s\n",
+ fd_dev->fd_dev_name);
+ fd_dev->fbd_flags |= FBDF_HAS_PATH;
+ break;
+ case Opt_fd_dev_size:
+ arg_p = match_strdup(&args[0]);
+ ret = strict_strtoull(arg_p, 0, &fd_dev->fd_dev_size);
+ if (ret < 0) {
+ printk(KERN_ERR "strict_strtoull() failed for"
+ " fd_dev_size=\n");
+ goto out;
+ }
+ printk(KERN_INFO "FILEIO: Referencing Size: %llu"
+ " bytes\n", fd_dev->fd_dev_size);
+ fd_dev->fbd_flags |= FBDF_HAS_SIZE;
+ break;
+ case Opt_fd_buffered_io:
+ match_int(args, &arg);
+ if (arg != 1) {
+ printk(KERN_ERR "bogus fd_buffered_io=%d value\n", arg);
+ ret = -EINVAL;
+ goto out;
+ }
+
+ printk(KERN_INFO "FILEIO: Using buffered I/O"
+ " operations for struct fd_dev\n");
+
+ fd_dev->fbd_flags |= FDBD_USE_BUFFERED_IO;
+ break;
+ default:
+ break;
+ }
+ }
+
+out:
+ kfree(orig);
+ return (!ret) ? count : ret;
+}
+
+static ssize_t fd_check_configfs_dev_params(struct se_hba *hba, struct se_subsystem_dev *se_dev)
+{
+ struct fd_dev *fd_dev = (struct fd_dev *) se_dev->se_dev_su_ptr;
+
+ if (!(fd_dev->fbd_flags & FBDF_HAS_PATH)) {
+ printk(KERN_ERR "Missing fd_dev_name=\n");
+ return -1;
+ }
+
+ return 0;
+}
+
+static ssize_t fd_show_configfs_dev_params(
+ struct se_hba *hba,
+ struct se_subsystem_dev *se_dev,
+ char *b)
+{
+ struct fd_dev *fd_dev = se_dev->se_dev_su_ptr;
+ ssize_t bl = 0;
+
+ bl = sprintf(b + bl, "TCM FILEIO ID: %u", fd_dev->fd_dev_id);
+ bl += sprintf(b + bl, " File: %s Size: %llu Mode: %s\n",
+ fd_dev->fd_dev_name, fd_dev->fd_dev_size,
+ (fd_dev->fbd_flags & FDBD_USE_BUFFERED_IO) ?
+ "Buffered" : "Synchronous");
+ return bl;
+}
+
+/* fd_get_cdb(): (Part of se_subsystem_api_t template)
+ *
+ *
+ */
+static unsigned char *fd_get_cdb(struct se_task *task)
+{
+ struct fd_request *req = FILE_REQ(task);
+
+ return req->fd_scsi_cdb;
+}
+
+/* fd_get_device_rev(): (Part of se_subsystem_api_t template)
+ *
+ *
+ */
+static u32 fd_get_device_rev(struct se_device *dev)
+{
+ return SCSI_SPC_2; /* Returns SPC-3 in Initiator Data */
+}
+
+/* fd_get_device_type(): (Part of se_subsystem_api_t template)
+ *
+ *
+ */
+static u32 fd_get_device_type(struct se_device *dev)
+{
+ return TYPE_DISK;
+}
+
+static sector_t fd_get_blocks(struct se_device *dev)
+{
+ struct fd_dev *fd_dev = dev->dev_ptr;
+ unsigned long long blocks_long = div_u64(fd_dev->fd_dev_size,
+ DEV_ATTRIB(dev)->block_size);
+
+ return blocks_long;
+}
+
+static struct se_subsystem_api fileio_template = {
+ .name = "fileio",
+ .owner = THIS_MODULE,
+ .transport_type = TRANSPORT_PLUGIN_VHBA_PDEV,
+ .attach_hba = fd_attach_hba,
+ .detach_hba = fd_detach_hba,
+ .allocate_virtdevice = fd_allocate_virtdevice,
+ .create_virtdevice = fd_create_virtdevice,
+ .free_device = fd_free_device,
+ .dpo_emulated = fd_emulated_dpo,
+ .fua_write_emulated = fd_emulated_fua_write,
+ .fua_read_emulated = fd_emulated_fua_read,
+ .write_cache_emulated = fd_emulated_write_cache,
+ .alloc_task = fd_alloc_task,
+ .do_task = fd_do_task,
+ .do_sync_cache = fd_emulate_sync_cache,
+ .free_task = fd_free_task,
+ .check_configfs_dev_params = fd_check_configfs_dev_params,
+ .set_configfs_dev_params = fd_set_configfs_dev_params,
+ .show_configfs_dev_params = fd_show_configfs_dev_params,
+ .get_cdb = fd_get_cdb,
+ .get_device_rev = fd_get_device_rev,
+ .get_device_type = fd_get_device_type,
+ .get_blocks = fd_get_blocks,
+};
+
+static int __init fileio_module_init(void)
+{
+ return transport_subsystem_register(&fileio_template);
+}
+
+static void fileio_module_exit(void)
+{
+ transport_subsystem_release(&fileio_template);
+}
+
+MODULE_DESCRIPTION("TCM FILEIO subsystem plugin");
+MODULE_AUTHOR("nab@Linux-iSCSI.org");
+MODULE_LICENSE("GPL");
+
+module_init(fileio_module_init);
+module_exit(fileio_module_exit);
diff --git a/drivers/target/target_core_file.h b/drivers/target/target_core_file.h
new file mode 100644
index 0000000..ef4de2b
--- /dev/null
+++ b/drivers/target/target_core_file.h
@@ -0,0 +1,50 @@
+#ifndef TARGET_CORE_FILE_H
+#define TARGET_CORE_FILE_H
+
+#define FD_VERSION "4.0"
+
+#define FD_MAX_DEV_NAME 256
+/* Maximum queuedepth for the FILEIO HBA */
+#define FD_HBA_QUEUE_DEPTH 256
+#define FD_DEVICE_QUEUE_DEPTH 32
+#define FD_MAX_DEVICE_QUEUE_DEPTH 128
+#define FD_BLOCKSIZE 512
+#define FD_MAX_SECTORS 1024
+
+#define RRF_EMULATE_CDB 0x01
+#define RRF_GOT_LBA 0x02
+
+struct fd_request {
+ struct se_task fd_task;
+ /* SCSI CDB from iSCSI Command PDU */
+ unsigned char fd_scsi_cdb[TCM_MAX_COMMAND_SIZE];
+ /* FILEIO device */
+ struct fd_dev *fd_dev;
+} ____cacheline_aligned;
+
+#define FBDF_HAS_PATH 0x01
+#define FBDF_HAS_SIZE 0x02
+#define FDBD_USE_BUFFERED_IO 0x04
+
+struct fd_dev {
+ u32 fbd_flags;
+ unsigned char fd_dev_name[FD_MAX_DEV_NAME];
+ /* Unique Ramdisk Device ID in Ramdisk HBA */
+ u32 fd_dev_id;
+ /* Number of SG tables in sg_table_array */
+ u32 fd_table_count;
+ u32 fd_queue_depth;
+ u32 fd_block_size;
+ unsigned long long fd_dev_size;
+ struct file *fd_file;
+ /* FILEIO HBA device is connected to */
+ struct fd_host *fd_host;
+} ____cacheline_aligned;
+
+struct fd_host {
+ u32 fd_host_dev_id_count;
+ /* Unique FILEIO Host ID */
+ u32 fd_host_id;
+} ____cacheline_aligned;
+
+#endif /* TARGET_CORE_FILE_H */
--
1.7.3.4
^ permalink raw reply related [flat|nested] 22+ messages in thread* [PATCH v2 02n/03] target: Add IBLOCK subsystem plugin
2010-12-17 21:11 [PATCH v2 00/03] target: Initial merge of v4.0.0-rc6 for .38 Nicholas A. Bellinger
` (13 preceding siblings ...)
2010-12-17 21:11 ` [PATCH v2 02m/03] target: Add FILEIO subsystem plugin Nicholas A. Bellinger
@ 2010-12-17 21:11 ` Nicholas A. Bellinger
2010-12-17 21:11 ` [PATCH v2 02o/03] target: Add PSCSI " Nicholas A. Bellinger
` (5 subsequent siblings)
20 siblings, 0 replies; 22+ messages in thread
From: Nicholas A. Bellinger @ 2010-12-17 21:11 UTC (permalink / raw)
To: linux-scsi, James Bottomley; +Cc: Nicholas Bellinger
From: Nicholas Bellinger <nab@linux-iscsi.org>
This patch adds the TCM/IBLOCK subsystem plugin for accessing struct block_device
with an emulated SPC-3 control path from Linux/BLOCK code using struct bio. The
also includes WriteCache and FUA Write emulation to struct block_device using
block/blk-barrier.c:blkdev_issue_flush()
Signed-off-by: Nicholas A. Bellinger <nab@linux-iscsi.org>
---
drivers/target/target_core_iblock.c | 808 +++++++++++++++++++++++++++++++++++
drivers/target/target_core_iblock.h | 40 ++
2 files changed, 848 insertions(+), 0 deletions(-)
create mode 100644 drivers/target/target_core_iblock.c
create mode 100644 drivers/target/target_core_iblock.h
diff --git a/drivers/target/target_core_iblock.c b/drivers/target/target_core_iblock.c
new file mode 100644
index 0000000..e99bfc2
--- /dev/null
+++ b/drivers/target/target_core_iblock.c
@@ -0,0 +1,808 @@
+/*******************************************************************************
+ * Filename: target_core_iblock.c
+ *
+ * This file contains the Storage Engine <-> Linux BlockIO transport
+ * specific functions.
+ *
+ * Copyright (c) 2003, 2004, 2005 PyX Technologies, Inc.
+ * Copyright (c) 2005, 2006, 2007 SBE, Inc.
+ * Copyright (c) 2007-2010 Rising Tide Systems
+ * Copyright (c) 2008-2010 Linux-iSCSI.org
+ *
+ * Nicholas A. Bellinger <nab@kernel.org>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+ *
+ ******************************************************************************/
+
+#include <linux/version.h>
+#include <linux/string.h>
+#include <linux/parser.h>
+#include <linux/timer.h>
+#include <linux/fs.h>
+#include <linux/blkdev.h>
+#include <linux/slab.h>
+#include <linux/spinlock.h>
+#include <linux/smp_lock.h>
+#include <linux/bio.h>
+#include <linux/genhd.h>
+#include <linux/file.h>
+#include <scsi/scsi.h>
+#include <scsi/scsi_host.h>
+
+#include <target/target_core_base.h>
+#include <target/target_core_device.h>
+#include <target/target_core_transport.h>
+
+#include "target_core_iblock.h"
+
+#if 0
+#define DEBUG_IBLOCK(x...) printk(x)
+#else
+#define DEBUG_IBLOCK(x...)
+#endif
+
+static struct se_subsystem_api iblock_template;
+
+static void iblock_bio_done(struct bio *, int);
+
+/* iblock_attach_hba(): (Part of se_subsystem_api_t template)
+ *
+ *
+ */
+static int iblock_attach_hba(struct se_hba *hba, u32 host_id)
+{
+ struct iblock_hba *ib_host;
+
+ ib_host = kzalloc(sizeof(struct iblock_hba), GFP_KERNEL);
+ if (!(ib_host)) {
+ printk(KERN_ERR "Unable to allocate memory for"
+ " struct iblock_hba\n");
+ return -ENOMEM;
+ }
+
+ ib_host->iblock_host_id = host_id;
+
+ atomic_set(&hba->left_queue_depth, IBLOCK_HBA_QUEUE_DEPTH);
+ atomic_set(&hba->max_queue_depth, IBLOCK_HBA_QUEUE_DEPTH);
+ hba->hba_ptr = (void *) ib_host;
+
+ printk(KERN_INFO "CORE_HBA[%d] - TCM iBlock HBA Driver %s on"
+ " Generic Target Core Stack %s\n", hba->hba_id,
+ IBLOCK_VERSION, TARGET_CORE_MOD_VERSION);
+
+ printk(KERN_INFO "CORE_HBA[%d] - Attached iBlock HBA: %u to Generic"
+ " Target Core TCQ Depth: %d\n", hba->hba_id,
+ ib_host->iblock_host_id, atomic_read(&hba->max_queue_depth));
+
+ return 0;
+}
+
+static void iblock_detach_hba(struct se_hba *hba)
+{
+ struct iblock_hba *ib_host = hba->hba_ptr;
+
+ printk(KERN_INFO "CORE_HBA[%d] - Detached iBlock HBA: %u from Generic"
+ " Target Core\n", hba->hba_id, ib_host->iblock_host_id);
+
+ kfree(ib_host);
+ hba->hba_ptr = NULL;
+}
+
+static void *iblock_allocate_virtdevice(struct se_hba *hba, const char *name)
+{
+ struct iblock_dev *ib_dev = NULL;
+ struct iblock_hba *ib_host = hba->hba_ptr;
+
+ ib_dev = kzalloc(sizeof(struct iblock_dev), GFP_KERNEL);
+ if (!(ib_dev)) {
+ printk(KERN_ERR "Unable to allocate struct iblock_dev\n");
+ return NULL;
+ }
+ ib_dev->ibd_host = ib_host;
+
+ printk(KERN_INFO "IBLOCK: Allocated ib_dev for %s\n", name);
+
+ return ib_dev;
+}
+
+static struct se_device *iblock_create_virtdevice(
+ struct se_hba *hba,
+ struct se_subsystem_dev *se_dev,
+ void *p)
+{
+ struct iblock_dev *ib_dev = p;
+ struct se_device *dev;
+ struct se_dev_limits dev_limits;
+ struct block_device *bd = NULL;
+ struct request_queue *q;
+ struct queue_limits *limits;
+ u32 dev_flags = 0;
+
+ if (!(ib_dev)) {
+ printk(KERN_ERR "Unable to locate struct iblock_dev parameter\n");
+ return 0;
+ }
+ memset(&dev_limits, 0, sizeof(struct se_dev_limits));
+ /*
+ * These settings need to be made tunable..
+ */
+ ib_dev->ibd_bio_set = bioset_create(32, 64);
+ if (!(ib_dev->ibd_bio_set)) {
+ printk(KERN_ERR "IBLOCK: Unable to create bioset()\n");
+ return 0;
+ }
+ printk(KERN_INFO "IBLOCK: Created bio_set()\n");
+ /*
+ * iblock_check_configfs_dev_params() ensures that ib_dev->ibd_udev_path
+ * must already have been set in order for echo 1 > $HBA/$DEV/enable to run.
+ */
+ printk(KERN_INFO "IBLOCK: Claiming struct block_device: %s\n",
+ ib_dev->ibd_udev_path);
+
+ bd = open_bdev_exclusive(ib_dev->ibd_udev_path,
+ FMODE_WRITE|FMODE_READ, ib_dev);
+ if (!(bd))
+ goto failed;
+ /*
+ * Setup the local scope queue_limits from struct request_queue->limits
+ * to pass into transport_add_device_to_core_hba() as struct se_dev_limits.
+ */
+ q = bdev_get_queue(bd);
+ limits = &dev_limits.limits;
+ limits->logical_block_size = bdev_logical_block_size(bd);
+ limits->max_hw_sectors = queue_max_hw_sectors(q);
+ limits->max_sectors = queue_max_sectors(q);
+ dev_limits.hw_queue_depth = IBLOCK_MAX_DEVICE_QUEUE_DEPTH;
+ dev_limits.queue_depth = IBLOCK_DEVICE_QUEUE_DEPTH;
+
+ ib_dev->ibd_major = MAJOR(bd->bd_dev);
+ ib_dev->ibd_minor = MINOR(bd->bd_dev);
+ ib_dev->ibd_bd = bd;
+
+ dev = transport_add_device_to_core_hba(hba,
+ &iblock_template, se_dev, dev_flags, (void *)ib_dev,
+ &dev_limits, "IBLOCK", IBLOCK_VERSION);
+ if (!(dev))
+ goto failed;
+
+ ib_dev->ibd_depth = dev->queue_depth;
+
+ /*
+ * Check if the underlying struct block_device request_queue supports
+ * the QUEUE_FLAG_DISCARD bit for UNMAP/WRITE_SAME in SCSI + TRIM
+ * in ATA and we need to set TPE=1
+ */
+ if (blk_queue_discard(bdev_get_queue(bd))) {
+ struct request_queue *q = bdev_get_queue(bd);
+
+ DEV_ATTRIB(dev)->max_unmap_lba_count =
+ q->limits.max_discard_sectors;
+ /*
+ * Currently hardcoded to 1 in Linux/SCSI code..
+ */
+ DEV_ATTRIB(dev)->max_unmap_block_desc_count = 1;
+ DEV_ATTRIB(dev)->unmap_granularity =
+ q->limits.discard_granularity;
+ DEV_ATTRIB(dev)->unmap_granularity_alignment =
+ q->limits.discard_alignment;
+
+ printk(KERN_INFO "IBLOCK: BLOCK Discard support available,"
+ " disabled by default\n");
+ }
+
+ return dev;
+
+failed:
+ if (ib_dev->ibd_bio_set) {
+ bioset_free(ib_dev->ibd_bio_set);
+ ib_dev->ibd_bio_set = NULL;
+ }
+ ib_dev->ibd_bd = NULL;
+ ib_dev->ibd_major = 0;
+ ib_dev->ibd_minor = 0;
+ return NULL;
+}
+
+static void iblock_free_device(void *p)
+{
+ struct iblock_dev *ib_dev = p;
+
+ close_bdev_exclusive(ib_dev->ibd_bd, FMODE_WRITE|FMODE_READ);
+ bioset_free(ib_dev->ibd_bio_set);
+ kfree(ib_dev);
+}
+
+static inline struct iblock_req *IBLOCK_REQ(struct se_task *task)
+{
+ return container_of(task, struct iblock_req, ib_task);
+}
+
+static struct se_task *
+iblock_alloc_task(struct se_cmd *cmd)
+{
+ struct iblock_req *ib_req;
+
+ ib_req = kzalloc(sizeof(struct iblock_req), GFP_KERNEL);
+ if (!(ib_req)) {
+ printk(KERN_ERR "Unable to allocate memory for struct iblock_req\n");
+ return NULL;
+ }
+
+ ib_req->ib_dev = SE_DEV(cmd)->dev_ptr;
+ atomic_set(&ib_req->ib_bio_cnt, 0);
+ return &ib_req->ib_task;
+}
+
+static unsigned long long iblock_emulate_read_cap_with_block_size(
+ struct se_device *dev,
+ struct block_device *bd,
+ struct request_queue *q)
+{
+ unsigned long long blocks_long = (div_u64(i_size_read(bd->bd_inode),
+ bdev_logical_block_size(bd)) - 1);
+ u32 block_size = bdev_logical_block_size(bd);
+
+ if (block_size == DEV_ATTRIB(dev)->block_size)
+ return blocks_long;
+
+ switch (block_size) {
+ case 4096:
+ switch (DEV_ATTRIB(dev)->block_size) {
+ case 2048:
+ blocks_long <<= 1;
+ break;
+ case 1024:
+ blocks_long <<= 2;
+ break;
+ case 512:
+ blocks_long <<= 3;
+ default:
+ break;
+ }
+ break;
+ case 2048:
+ switch (DEV_ATTRIB(dev)->block_size) {
+ case 4096:
+ blocks_long >>= 1;
+ break;
+ case 1024:
+ blocks_long <<= 1;
+ break;
+ case 512:
+ blocks_long <<= 2;
+ break;
+ default:
+ break;
+ }
+ break;
+ case 1024:
+ switch (DEV_ATTRIB(dev)->block_size) {
+ case 4096:
+ blocks_long >>= 2;
+ break;
+ case 2048:
+ blocks_long >>= 1;
+ break;
+ case 512:
+ blocks_long <<= 1;
+ break;
+ default:
+ break;
+ }
+ break;
+ case 512:
+ switch (DEV_ATTRIB(dev)->block_size) {
+ case 4096:
+ blocks_long >>= 3;
+ break;
+ case 2048:
+ blocks_long >>= 2;
+ break;
+ case 1024:
+ blocks_long >>= 1;
+ break;
+ default:
+ break;
+ }
+ break;
+ default:
+ break;
+ }
+
+ return blocks_long;
+}
+
+/*
+ * Emulate SYCHRONIZE_CACHE_*
+ */
+static void iblock_emulate_sync_cache(struct se_task *task)
+{
+ struct se_cmd *cmd = TASK_CMD(task);
+ struct iblock_dev *ib_dev = cmd->se_dev->dev_ptr;
+ int immed = (T_TASK(cmd)->t_task_cdb[1] & 0x2);
+ sector_t error_sector;
+ int ret;
+
+ /*
+ * If the Immediate bit is set, queue up the GOOD response
+ * for this SYNCHRONIZE_CACHE op
+ */
+ if (immed)
+ transport_complete_sync_cache(cmd, 1);
+
+ /*
+ * blkdev_issue_flush() does not support a specifying a range, so
+ * we have to flush the entire cache.
+ */
+ ret = blkdev_issue_flush(ib_dev->ibd_bd, GFP_KERNEL, &error_sector);
+ if (ret != 0) {
+ printk(KERN_ERR "IBLOCK: block_issue_flush() failed: %d "
+ " error_sector: %llu\n", ret,
+ (unsigned long long)error_sector);
+ }
+
+ if (!immed)
+ transport_complete_sync_cache(cmd, ret == 0);
+}
+
+/*
+ * Tell TCM Core that we are capable of WriteCache emulation for
+ * an underlying struct se_device.
+ */
+static int iblock_emulated_write_cache(struct se_device *dev)
+{
+ return 1;
+}
+
+static int iblock_emulated_dpo(struct se_device *dev)
+{
+ return 0;
+}
+
+/*
+ * Tell TCM Core that we will be emulating Forced Unit Access (FUA) for WRITEs
+ * for TYPE_DISK.
+ */
+static int iblock_emulated_fua_write(struct se_device *dev)
+{
+ return 1;
+}
+
+static int iblock_emulated_fua_read(struct se_device *dev)
+{
+ return 0;
+}
+
+static int iblock_do_task(struct se_task *task)
+{
+ struct se_device *dev = task->task_se_cmd->se_dev;
+ struct iblock_req *req = IBLOCK_REQ(task);
+ struct iblock_dev *ibd = (struct iblock_dev *)req->ib_dev;
+ struct request_queue *q = bdev_get_queue(ibd->ibd_bd);
+ struct bio *bio = req->ib_bio, *nbio = NULL;
+ int rw;
+
+ if (task->task_data_direction == DMA_TO_DEVICE) {
+ /*
+ * Force data to disk if we pretend to not have a volatile
+ * write cache, or the initiator set the Force Unit Access bit.
+ */
+ if (DEV_ATTRIB(dev)->emulate_write_cache == 0 ||
+ (DEV_ATTRIB(dev)->emulate_fua_write > 0 &&
+ T_TASK(task->task_se_cmd)->t_tasks_fua))
+ rw = WRITE_FUA;
+ else
+ rw = WRITE;
+ } else {
+ rw = READ;
+ }
+
+ while (bio) {
+ nbio = bio->bi_next;
+ bio->bi_next = NULL;
+ DEBUG_IBLOCK("Calling submit_bio() task: %p bio: %p"
+ " bio->bi_sector: %llu\n", task, bio, bio->bi_sector);
+
+ submit_bio(rw, bio);
+ bio = nbio;
+ }
+
+ if (q->unplug_fn)
+ q->unplug_fn(q);
+ return PYX_TRANSPORT_SENT_TO_TRANSPORT;
+}
+
+static int iblock_do_discard(struct se_device *dev, sector_t lba, u32 range)
+{
+ struct iblock_dev *ibd = dev->dev_ptr;
+ struct block_device *bd = ibd->ibd_bd;
+ int barrier = 0;
+
+ return blkdev_issue_discard(bd, lba, range, GFP_KERNEL, barrier);
+}
+
+static void iblock_free_task(struct se_task *task)
+{
+ struct iblock_req *req = IBLOCK_REQ(task);
+ struct bio *bio, *hbio = req->ib_bio;
+ /*
+ * We only release the bio(s) here if iblock_bio_done() has not called
+ * bio_put() -> iblock_bio_destructor().
+ */
+ while (hbio != NULL) {
+ bio = hbio;
+ hbio = hbio->bi_next;
+ bio->bi_next = NULL;
+ bio_put(bio);
+ }
+
+ kfree(req);
+}
+
+enum {
+ Opt_udev_path, Opt_force, Opt_err
+};
+
+static match_table_t tokens = {
+ {Opt_udev_path, "udev_path=%s"},
+ {Opt_force, "force=%d"},
+ {Opt_err, NULL}
+};
+
+static ssize_t iblock_set_configfs_dev_params(struct se_hba *hba,
+ struct se_subsystem_dev *se_dev,
+ const char *page, ssize_t count)
+{
+ struct iblock_dev *ib_dev = se_dev->se_dev_su_ptr;
+ char *orig, *ptr, *opts;
+ substring_t args[MAX_OPT_ARGS];
+ int ret = 0, arg, token;
+
+ opts = kstrdup(page, GFP_KERNEL);
+ if (!opts)
+ return -ENOMEM;
+
+ orig = opts;
+
+ while ((ptr = strsep(&opts, ",")) != NULL) {
+ if (!*ptr)
+ continue;
+
+ token = match_token(ptr, tokens, args);
+ switch (token) {
+ case Opt_udev_path:
+ if (ib_dev->ibd_bd) {
+ printk(KERN_ERR "Unable to set udev_path= while"
+ " ib_dev->ibd_bd exists\n");
+ ret = -EEXIST;
+ goto out;
+ }
+
+ ret = snprintf(ib_dev->ibd_udev_path, SE_UDEV_PATH_LEN,
+ "%s", match_strdup(&args[0]));
+ printk(KERN_INFO "IBLOCK: Referencing UDEV path: %s\n",
+ ib_dev->ibd_udev_path);
+ ib_dev->ibd_flags |= IBDF_HAS_UDEV_PATH;
+ break;
+ case Opt_force:
+ match_int(args, &arg);
+ ib_dev->ibd_force = arg;
+ printk(KERN_INFO "IBLOCK: Set force=%d\n",
+ ib_dev->ibd_force);
+ break;
+ default:
+ break;
+ }
+ }
+
+out:
+ kfree(orig);
+ return (!ret) ? count : ret;
+}
+
+static ssize_t iblock_check_configfs_dev_params(
+ struct se_hba *hba,
+ struct se_subsystem_dev *se_dev)
+{
+ struct iblock_dev *ibd = se_dev->se_dev_su_ptr;
+
+ if (!(ibd->ibd_flags & IBDF_HAS_UDEV_PATH)) {
+ printk(KERN_ERR "Missing udev_path= parameters for IBLOCK\n");
+ return -1;
+ }
+
+ return 0;
+}
+
+static ssize_t iblock_show_configfs_dev_params(
+ struct se_hba *hba,
+ struct se_subsystem_dev *se_dev,
+ char *b)
+{
+ struct iblock_dev *ibd = se_dev->se_dev_su_ptr;
+ struct block_device *bd = ibd->ibd_bd;
+ char buf[BDEVNAME_SIZE];
+ ssize_t bl = 0;
+
+ if (bd)
+ bl += sprintf(b + bl, "iBlock device: %s",
+ bdevname(bd, buf));
+ if (ibd->ibd_flags & IBDF_HAS_UDEV_PATH) {
+ bl += sprintf(b + bl, " UDEV PATH: %s\n",
+ ibd->ibd_udev_path);
+ } else
+ bl += sprintf(b + bl, "\n");
+
+ bl += sprintf(b + bl, " ");
+ if (bd) {
+ bl += sprintf(b + bl, "Major: %d Minor: %d %s\n",
+ ibd->ibd_major, ibd->ibd_minor, (!bd->bd_contains) ?
+ "" : (bd->bd_holder == (struct iblock_dev *)ibd) ?
+ "CLAIMED: IBLOCK" : "CLAIMED: OS");
+ } else {
+ bl += sprintf(b + bl, "Major: %d Minor: %d\n",
+ ibd->ibd_major, ibd->ibd_minor);
+ }
+
+ return bl;
+}
+
+static void iblock_bio_destructor(struct bio *bio)
+{
+ struct se_task *task = bio->bi_private;
+ struct iblock_dev *ib_dev = task->se_dev->dev_ptr;
+
+ bio_free(bio, ib_dev->ibd_bio_set);
+}
+
+static struct bio *iblock_get_bio(
+ struct se_task *task,
+ struct iblock_req *ib_req,
+ struct iblock_dev *ib_dev,
+ int *ret,
+ sector_t lba,
+ u32 sg_num)
+{
+ struct bio *bio;
+
+ bio = bio_alloc_bioset(GFP_NOIO, sg_num, ib_dev->ibd_bio_set);
+ if (!(bio)) {
+ printk(KERN_ERR "Unable to allocate memory for bio\n");
+ *ret = PYX_TRANSPORT_OUT_OF_MEMORY_RESOURCES;
+ return NULL;
+ }
+
+ DEBUG_IBLOCK("Allocated bio: %p task_sg_num: %u using ibd_bio_set:"
+ " %p\n", bio, task->task_sg_num, ib_dev->ibd_bio_set);
+ DEBUG_IBLOCK("Allocated bio: %p task_size: %u\n", bio, task->task_size);
+
+ bio->bi_bdev = ib_dev->ibd_bd;
+ bio->bi_private = (void *) task;
+ bio->bi_destructor = iblock_bio_destructor;
+ bio->bi_end_io = &iblock_bio_done;
+ bio->bi_sector = lba;
+ atomic_inc(&ib_req->ib_bio_cnt);
+
+ DEBUG_IBLOCK("Set bio->bi_sector: %llu\n", bio->bi_sector);
+ DEBUG_IBLOCK("Set ib_req->ib_bio_cnt: %d\n",
+ atomic_read(&ib_req->ib_bio_cnt));
+ return bio;
+}
+
+static int iblock_map_task_SG(struct se_task *task)
+{
+ struct se_cmd *cmd = task->task_se_cmd;
+ struct se_device *dev = SE_DEV(cmd);
+ struct iblock_dev *ib_dev = task->se_dev->dev_ptr;
+ struct iblock_req *ib_req = IBLOCK_REQ(task);
+ struct bio *bio = NULL, *hbio = NULL, *tbio = NULL;
+ struct scatterlist *sg;
+ int ret = 0;
+ u32 i, sg_num = task->task_sg_num;
+ sector_t block_lba;
+ /*
+ * Do starting conversion up from non 512-byte blocksize with
+ * struct se_task SCSI blocksize into Linux/Block 512 units for BIO.
+ */
+ if (DEV_ATTRIB(dev)->block_size == 4096)
+ block_lba = (task->task_lba << 3);
+ else if (DEV_ATTRIB(dev)->block_size == 2048)
+ block_lba = (task->task_lba << 2);
+ else if (DEV_ATTRIB(dev)->block_size == 1024)
+ block_lba = (task->task_lba << 1);
+ else if (DEV_ATTRIB(dev)->block_size == 512)
+ block_lba = task->task_lba;
+ else {
+ printk(KERN_ERR "Unsupported SCSI -> BLOCK LBA conversion:"
+ " %u\n", DEV_ATTRIB(dev)->block_size);
+ return PYX_TRANSPORT_LU_COMM_FAILURE;
+ }
+
+ bio = iblock_get_bio(task, ib_req, ib_dev, &ret, block_lba, sg_num);
+ if (!(bio))
+ return ret;
+
+ ib_req->ib_bio = bio;
+ hbio = tbio = bio;
+ /*
+ * Use fs/bio.c:bio_add_pages() to setup the bio_vec maplist
+ * from TCM struct se_mem -> task->task_sg -> struct scatterlist memory.
+ */
+ for_each_sg(task->task_sg, sg, task->task_sg_num, i) {
+ DEBUG_IBLOCK("task: %p bio: %p Calling bio_add_page(): page:"
+ " %p len: %u offset: %u\n", task, bio, sg_page(sg),
+ sg->length, sg->offset);
+again:
+ ret = bio_add_page(bio, sg_page(sg), sg->length, sg->offset);
+ if (ret != sg->length) {
+
+ DEBUG_IBLOCK("*** Set bio->bi_sector: %llu\n",
+ bio->bi_sector);
+ DEBUG_IBLOCK("** task->task_size: %u\n",
+ task->task_size);
+ DEBUG_IBLOCK("*** bio->bi_max_vecs: %u\n",
+ bio->bi_max_vecs);
+ DEBUG_IBLOCK("*** bio->bi_vcnt: %u\n",
+ bio->bi_vcnt);
+
+ bio = iblock_get_bio(task, ib_req, ib_dev, &ret,
+ block_lba, sg_num);
+ if (!(bio))
+ goto fail;
+
+ tbio = tbio->bi_next = bio;
+ DEBUG_IBLOCK("-----------------> Added +1 bio: %p to"
+ " list, Going to again\n", bio);
+ goto again;
+ }
+ /* Always in 512 byte units for Linux/Block */
+ block_lba += sg->length >> IBLOCK_LBA_SHIFT;
+ sg_num--;
+ DEBUG_IBLOCK("task: %p bio-add_page() passed!, decremented"
+ " sg_num to %u\n", task, sg_num);
+ DEBUG_IBLOCK("task: %p bio_add_page() passed!, increased lba"
+ " to %llu\n", task, block_lba);
+ DEBUG_IBLOCK("task: %p bio_add_page() passed!, bio->bi_vcnt:"
+ " %u\n", task, bio->bi_vcnt);
+ }
+
+ return 0;
+fail:
+ while (hbio) {
+ bio = hbio;
+ hbio = hbio->bi_next;
+ bio->bi_next = NULL;
+ bio_put(bio);
+ }
+ return ret;
+}
+
+static unsigned char *iblock_get_cdb(struct se_task *task)
+{
+ return IBLOCK_REQ(task)->ib_scsi_cdb;
+}
+
+static u32 iblock_get_device_rev(struct se_device *dev)
+{
+ return SCSI_SPC_2; /* Returns SPC-3 in Initiator Data */
+}
+
+static u32 iblock_get_device_type(struct se_device *dev)
+{
+ return TYPE_DISK;
+}
+
+static sector_t iblock_get_blocks(struct se_device *dev)
+{
+ struct iblock_dev *ibd = dev->dev_ptr;
+ struct block_device *bd = ibd->ibd_bd;
+ struct request_queue *q = bdev_get_queue(bd);
+
+ return iblock_emulate_read_cap_with_block_size(dev, bd, q);
+}
+
+static void iblock_bio_done(struct bio *bio, int err)
+{
+ struct se_task *task = bio->bi_private;
+ struct iblock_req *ibr = IBLOCK_REQ(task);
+ /*
+ * Set -EIO if !BIO_UPTODATE and the passed is still err=0
+ */
+ if (!(test_bit(BIO_UPTODATE, &bio->bi_flags)) && !(err))
+ err = -EIO;
+
+ if (err != 0) {
+ printk(KERN_ERR "test_bit(BIO_UPTODATE) failed for bio: %p,"
+ " err: %d\n", bio, err);
+ /*
+ * Bump the ib_bio_err_cnt and release bio.
+ */
+ atomic_inc(&ibr->ib_bio_err_cnt);
+ smp_mb__after_atomic_inc();
+ bio_put(bio);
+ /*
+ * Wait to complete the task until the last bio as completed.
+ */
+ if (!(atomic_dec_and_test(&ibr->ib_bio_cnt)))
+ return;
+
+ ibr->ib_bio = NULL;
+ transport_complete_task(task, 0);
+ return;
+ }
+ DEBUG_IBLOCK("done[%p] bio: %p task_lba: %llu bio_lba: %llu err=%d\n",
+ task, bio, task->task_lba, bio->bi_sector, err);
+ /*
+ * bio_put() will call iblock_bio_destructor() to release the bio back
+ * to ibr->ib_bio_set.
+ */
+ bio_put(bio);
+ /*
+ * Wait to complete the task until the last bio as completed.
+ */
+ if (!(atomic_dec_and_test(&ibr->ib_bio_cnt)))
+ return;
+ /*
+ * Return GOOD status for task if zero ib_bio_err_cnt exists.
+ */
+ ibr->ib_bio = NULL;
+ transport_complete_task(task, (!atomic_read(&ibr->ib_bio_err_cnt)));
+}
+
+static struct se_subsystem_api iblock_template = {
+ .name = "iblock",
+ .owner = THIS_MODULE,
+ .transport_type = TRANSPORT_PLUGIN_VHBA_PDEV,
+ .map_task_SG = iblock_map_task_SG,
+ .attach_hba = iblock_attach_hba,
+ .detach_hba = iblock_detach_hba,
+ .allocate_virtdevice = iblock_allocate_virtdevice,
+ .create_virtdevice = iblock_create_virtdevice,
+ .free_device = iblock_free_device,
+ .dpo_emulated = iblock_emulated_dpo,
+ .fua_write_emulated = iblock_emulated_fua_write,
+ .fua_read_emulated = iblock_emulated_fua_read,
+ .write_cache_emulated = iblock_emulated_write_cache,
+ .alloc_task = iblock_alloc_task,
+ .do_task = iblock_do_task,
+ .do_discard = iblock_do_discard,
+ .do_sync_cache = iblock_emulate_sync_cache,
+ .free_task = iblock_free_task,
+ .check_configfs_dev_params = iblock_check_configfs_dev_params,
+ .set_configfs_dev_params = iblock_set_configfs_dev_params,
+ .show_configfs_dev_params = iblock_show_configfs_dev_params,
+ .get_cdb = iblock_get_cdb,
+ .get_device_rev = iblock_get_device_rev,
+ .get_device_type = iblock_get_device_type,
+ .get_blocks = iblock_get_blocks,
+};
+
+static int __init iblock_module_init(void)
+{
+ return transport_subsystem_register(&iblock_template);
+}
+
+static void iblock_module_exit(void)
+{
+ transport_subsystem_release(&iblock_template);
+}
+
+MODULE_DESCRIPTION("TCM IBLOCK subsystem plugin");
+MODULE_AUTHOR("nab@Linux-iSCSI.org");
+MODULE_LICENSE("GPL");
+
+module_init(iblock_module_init);
+module_exit(iblock_module_exit);
diff --git a/drivers/target/target_core_iblock.h b/drivers/target/target_core_iblock.h
new file mode 100644
index 0000000..64c1f4d
--- /dev/null
+++ b/drivers/target/target_core_iblock.h
@@ -0,0 +1,40 @@
+#ifndef TARGET_CORE_IBLOCK_H
+#define TARGET_CORE_IBLOCK_H
+
+#define IBLOCK_VERSION "4.0"
+
+#define IBLOCK_HBA_QUEUE_DEPTH 512
+#define IBLOCK_DEVICE_QUEUE_DEPTH 32
+#define IBLOCK_MAX_DEVICE_QUEUE_DEPTH 128
+#define IBLOCK_MAX_CDBS 16
+#define IBLOCK_LBA_SHIFT 9
+
+struct iblock_req {
+ struct se_task ib_task;
+ unsigned char ib_scsi_cdb[TCM_MAX_COMMAND_SIZE];
+ atomic_t ib_bio_cnt;
+ atomic_t ib_bio_err_cnt;
+ struct bio *ib_bio;
+ struct iblock_dev *ib_dev;
+} ____cacheline_aligned;
+
+#define IBDF_HAS_UDEV_PATH 0x01
+#define IBDF_HAS_FORCE 0x02
+
+struct iblock_dev {
+ unsigned char ibd_udev_path[SE_UDEV_PATH_LEN];
+ int ibd_force;
+ int ibd_major;
+ int ibd_minor;
+ u32 ibd_depth;
+ u32 ibd_flags;
+ struct bio_set *ibd_bio_set;
+ struct block_device *ibd_bd;
+ struct iblock_hba *ibd_host;
+} ____cacheline_aligned;
+
+struct iblock_hba {
+ int iblock_host_id;
+} ____cacheline_aligned;
+
+#endif /* TARGET_CORE_IBLOCK_H */
--
1.7.3.4
^ permalink raw reply related [flat|nested] 22+ messages in thread* [PATCH v2 02o/03] target: Add PSCSI subsystem plugin
2010-12-17 21:11 [PATCH v2 00/03] target: Initial merge of v4.0.0-rc6 for .38 Nicholas A. Bellinger
` (14 preceding siblings ...)
2010-12-17 21:11 ` [PATCH v2 02n/03] target: Add IBLOCK " Nicholas A. Bellinger
@ 2010-12-17 21:11 ` Nicholas A. Bellinger
2010-12-17 21:11 ` [PATCH v2 02p/03] target: Add RAMDISK_DR and RAMDISK_MCP subsystem plugins Nicholas A. Bellinger
` (4 subsequent siblings)
20 siblings, 0 replies; 22+ messages in thread
From: Nicholas A. Bellinger @ 2010-12-17 21:11 UTC (permalink / raw)
To: linux-scsi, James Bottomley; +Cc: Nicholas Bellinger
From: Nicholas Bellinger <nab@linux-iscsi.org>
This patch adds the PSCSI subsystem plugin for accessing struct scsi_device
using struct request from upstream Linux/SCSI code. This subsystem plugin
follows a passthrough design, and does not provide and control CDB emulation
for the registered struct scsi_device backstores. This subsystem plugin also
allows the export of both TYPE_DISk and non TYPE_DISK struct scsi_devices.
Signed-off-by: Nicholas A. Bellinger <nab@linux-iscsi.org>
---
drivers/target/target_core_pscsi.c | 1471 ++++++++++++++++++++++++++++++++++++
drivers/target/target_core_pscsi.h | 65 ++
2 files changed, 1536 insertions(+), 0 deletions(-)
create mode 100644 drivers/target/target_core_pscsi.c
create mode 100644 drivers/target/target_core_pscsi.h
diff --git a/drivers/target/target_core_pscsi.c b/drivers/target/target_core_pscsi.c
new file mode 100644
index 0000000..4761507
--- /dev/null
+++ b/drivers/target/target_core_pscsi.c
@@ -0,0 +1,1471 @@
+/*******************************************************************************
+ * Filename: target_core_pscsi.c
+ *
+ * This file contains the generic target mode <-> Linux SCSI subsystem plugin.
+ *
+ * Copyright (c) 2003, 2004, 2005 PyX Technologies, Inc.
+ * Copyright (c) 2005, 2006, 2007 SBE, Inc.
+ * Copyright (c) 2007-2010 Rising Tide Systems
+ * Copyright (c) 2008-2010 Linux-iSCSI.org
+ *
+ * Nicholas A. Bellinger <nab@kernel.org>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+ *
+ ******************************************************************************/
+
+#include <linux/version.h>
+#include <linux/string.h>
+#include <linux/parser.h>
+#include <linux/timer.h>
+#include <linux/blkdev.h>
+#include <linux/blk_types.h>
+#include <linux/slab.h>
+#include <linux/spinlock.h>
+#include <linux/smp_lock.h>
+#include <linux/genhd.h>
+#include <linux/cdrom.h>
+#include <linux/file.h>
+#include <scsi/scsi.h>
+#include <scsi/scsi_device.h>
+#include <scsi/scsi_cmnd.h>
+#include <scsi/scsi_host.h>
+#include <scsi/libsas.h> /* For TASK_ATTR_* */
+
+#include <target/target_core_base.h>
+#include <target/target_core_device.h>
+#include <target/target_core_transport.h>
+
+#include "target_core_pscsi.h"
+
+#define ISPRINT(a) ((a >= ' ') && (a <= '~'))
+
+static struct se_subsystem_api pscsi_template;
+
+static void pscsi_req_done(struct request *, int);
+
+/* pscsi_get_sh():
+ *
+ *
+ */
+static struct Scsi_Host *pscsi_get_sh(u32 host_no)
+{
+ struct Scsi_Host *sh = NULL;
+
+ sh = scsi_host_lookup(host_no);
+ if (IS_ERR(sh)) {
+ printk(KERN_ERR "Unable to locate SCSI HBA with Host ID:"
+ " %u\n", host_no);
+ return NULL;
+ }
+
+ return sh;
+}
+
+/* pscsi_attach_hba():
+ *
+ * pscsi_get_sh() used scsi_host_lookup() to locate struct Scsi_Host.
+ * from the passed SCSI Host ID.
+ */
+static int pscsi_attach_hba(struct se_hba *hba, u32 host_id)
+{
+ int hba_depth;
+ struct pscsi_hba_virt *phv;
+
+ phv = kzalloc(sizeof(struct pscsi_hba_virt), GFP_KERNEL);
+ if (!(phv)) {
+ printk(KERN_ERR "Unable to allocate struct pscsi_hba_virt\n");
+ return -1;
+ }
+ phv->phv_host_id = host_id;
+ phv->phv_mode = PHV_VIRUTAL_HOST_ID;
+ hba_depth = PSCSI_VIRTUAL_HBA_DEPTH;
+ atomic_set(&hba->left_queue_depth, hba_depth);
+ atomic_set(&hba->max_queue_depth, hba_depth);
+
+ hba->hba_ptr = (void *)phv;
+
+ printk(KERN_INFO "CORE_HBA[%d] - TCM SCSI HBA Driver %s on"
+ " Generic Target Core Stack %s\n", hba->hba_id,
+ PSCSI_VERSION, TARGET_CORE_MOD_VERSION);
+ printk(KERN_INFO "CORE_HBA[%d] - Attached SCSI HBA to Generic"
+ " Target Core with TCQ Depth: %d\n", hba->hba_id,
+ atomic_read(&hba->max_queue_depth));
+
+ return 0;
+}
+
+static void pscsi_detach_hba(struct se_hba *hba)
+{
+ struct pscsi_hba_virt *phv = hba->hba_ptr;
+ struct Scsi_Host *scsi_host = phv->phv_lld_host;
+
+ if (scsi_host) {
+ scsi_host_put(scsi_host);
+
+ printk(KERN_INFO "CORE_HBA[%d] - Detached SCSI HBA: %s from"
+ " Generic Target Core\n", hba->hba_id,
+ (scsi_host->hostt->name) ? (scsi_host->hostt->name) :
+ "Unknown");
+ } else
+ printk(KERN_INFO "CORE_HBA[%d] - Detached Virtual SCSI HBA"
+ " from Generic Target Core\n", hba->hba_id);
+
+ kfree(phv);
+ hba->hba_ptr = NULL;
+}
+
+static int pscsi_pmode_enable_hba(struct se_hba *hba, unsigned long mode_flag)
+{
+ struct pscsi_hba_virt *phv = (struct pscsi_hba_virt *)hba->hba_ptr;
+ struct Scsi_Host *sh = phv->phv_lld_host;
+ int hba_depth = PSCSI_VIRTUAL_HBA_DEPTH;
+ /*
+ * Release the struct Scsi_Host
+ */
+ if (!(mode_flag)) {
+ if (!(sh))
+ return 0;
+
+ phv->phv_lld_host = NULL;
+ phv->phv_mode = PHV_VIRUTAL_HOST_ID;
+ atomic_set(&hba->left_queue_depth, hba_depth);
+ atomic_set(&hba->max_queue_depth, hba_depth);
+
+ printk(KERN_INFO "CORE_HBA[%d] - Disabled pSCSI HBA Passthrough"
+ " %s\n", hba->hba_id, (sh->hostt->name) ?
+ (sh->hostt->name) : "Unknown");
+
+ scsi_host_put(sh);
+ return 0;
+ }
+ /*
+ * Otherwise, locate struct Scsi_Host from the original passed
+ * pSCSI Host ID and enable for phba mode
+ */
+ sh = pscsi_get_sh(phv->phv_host_id);
+ if (!(sh)) {
+ printk(KERN_ERR "pSCSI: Unable to locate SCSI Host for"
+ " phv_host_id: %d\n", phv->phv_host_id);
+ return -1;
+ }
+ /*
+ * Usually the SCSI LLD will use the hostt->can_queue value to define
+ * its HBA TCQ depth. Some other drivers (like 2.6 megaraid) don't set
+ * this at all and set sh->can_queue at runtime.
+ */
+ hba_depth = (sh->hostt->can_queue > sh->can_queue) ?
+ sh->hostt->can_queue : sh->can_queue;
+
+ atomic_set(&hba->left_queue_depth, hba_depth);
+ atomic_set(&hba->max_queue_depth, hba_depth);
+
+ phv->phv_lld_host = sh;
+ phv->phv_mode = PHV_LLD_SCSI_HOST_NO;
+
+ printk(KERN_INFO "CORE_HBA[%d] - Enabled pSCSI HBA Passthrough %s\n",
+ hba->hba_id, (sh->hostt->name) ? (sh->hostt->name) : "Unknown");
+
+ return 1;
+}
+
+static void pscsi_tape_read_blocksize(struct se_device *dev,
+ struct scsi_device *sdev)
+{
+ unsigned char cdb[MAX_COMMAND_SIZE], *buf;
+ int ret;
+
+ buf = kzalloc(12, GFP_KERNEL);
+ if (!buf)
+ return;
+
+ memset(cdb, 0, MAX_COMMAND_SIZE);
+ cdb[0] = MODE_SENSE;
+ cdb[4] = 0x0c; /* 12 bytes */
+
+ ret = scsi_execute_req(sdev, cdb, DMA_FROM_DEVICE, buf, 12, NULL,
+ HZ, 1, NULL);
+ if (ret)
+ goto out_free;
+
+ /*
+ * If MODE_SENSE still returns zero, set the default value to 1024.
+ */
+ sdev->sector_size = (buf[9] << 16) | (buf[10] << 8) | (buf[11]);
+ if (!sdev->sector_size)
+ sdev->sector_size = 1024;
+out_free:
+ kfree(buf);
+}
+
+static void
+pscsi_set_inquiry_info(struct scsi_device *sdev, struct t10_wwn *wwn)
+{
+ unsigned char *buf;
+
+ if (sdev->inquiry_len < INQUIRY_LEN)
+ return;
+
+ buf = sdev->inquiry;
+ if (!buf)
+ return;
+ /*
+ * Use sdev->inquiry from drivers/scsi/scsi_scan.c:scsi_alloc_sdev()
+ */
+ memcpy(&wwn->vendor[0], &buf[8], sizeof(wwn->vendor));
+ memcpy(&wwn->model[0], &buf[16], sizeof(wwn->model));
+ memcpy(&wwn->revision[0], &buf[32], sizeof(wwn->revision));
+}
+
+static int
+pscsi_get_inquiry_vpd_serial(struct scsi_device *sdev, struct t10_wwn *wwn)
+{
+ unsigned char cdb[MAX_COMMAND_SIZE], *buf;
+ int ret;
+
+ buf = kzalloc(INQUIRY_VPD_SERIAL_LEN, GFP_KERNEL);
+ if (!buf)
+ return -1;
+
+ memset(cdb, 0, MAX_COMMAND_SIZE);
+ cdb[0] = INQUIRY;
+ cdb[1] = 0x01; /* Query VPD */
+ cdb[2] = 0x80; /* Unit Serial Number */
+ cdb[3] = (INQUIRY_VPD_SERIAL_LEN >> 8) & 0xff;
+ cdb[4] = (INQUIRY_VPD_SERIAL_LEN & 0xff);
+
+ ret = scsi_execute_req(sdev, cdb, DMA_FROM_DEVICE, buf,
+ INQUIRY_VPD_SERIAL_LEN, NULL, HZ, 1, NULL);
+ if (ret)
+ goto out_free;
+
+ snprintf(&wwn->unit_serial[0], INQUIRY_VPD_SERIAL_LEN, "%s", &buf[4]);
+
+ wwn->t10_sub_dev->su_dev_flags |= SDF_FIRMWARE_VPD_UNIT_SERIAL;
+
+ kfree(buf);
+ return 0;
+
+out_free:
+ kfree(buf);
+ return -1;
+}
+
+static void
+pscsi_get_inquiry_vpd_device_ident(struct scsi_device *sdev,
+ struct t10_wwn *wwn)
+{
+ unsigned char cdb[MAX_COMMAND_SIZE], *buf, *page_83;
+ int ident_len, page_len, off = 4, ret;
+ struct t10_vpd *vpd;
+
+ buf = kzalloc(INQUIRY_VPD_SERIAL_LEN, GFP_KERNEL);
+ if (!buf)
+ return;
+
+ memset(cdb, 0, MAX_COMMAND_SIZE);
+ cdb[0] = INQUIRY;
+ cdb[1] = 0x01; /* Query VPD */
+ cdb[2] = 0x83; /* Device Identifier */
+ cdb[3] = (INQUIRY_VPD_DEVICE_IDENTIFIER_LEN >> 8) & 0xff;
+ cdb[4] = (INQUIRY_VPD_DEVICE_IDENTIFIER_LEN & 0xff);
+
+ ret = scsi_execute_req(sdev, cdb, DMA_FROM_DEVICE, buf,
+ INQUIRY_VPD_DEVICE_IDENTIFIER_LEN,
+ NULL, HZ, 1, NULL);
+ if (ret)
+ goto out;
+
+ page_len = (buf[2] << 8) | buf[3];
+ while (page_len > 0) {
+ /* Grab a pointer to the Identification descriptor */
+ page_83 = &buf[off];
+ ident_len = page_83[3];
+ if (!ident_len) {
+ printk(KERN_ERR "page_83[3]: identifier"
+ " length zero!\n");
+ break;
+ }
+ printk(KERN_INFO "T10 VPD Identifer Length: %d\n", ident_len);
+
+ vpd = kzalloc(sizeof(struct t10_vpd), GFP_KERNEL);
+ if (!vpd) {
+ printk(KERN_ERR "Unable to allocate memory for"
+ " struct t10_vpd\n");
+ goto out;
+ }
+ INIT_LIST_HEAD(&vpd->vpd_list);
+
+ transport_set_vpd_proto_id(vpd, page_83);
+ transport_set_vpd_assoc(vpd, page_83);
+
+ if (transport_set_vpd_ident_type(vpd, page_83) < 0) {
+ off += (ident_len + 4);
+ page_len -= (ident_len + 4);
+ kfree(vpd);
+ continue;
+ }
+ if (transport_set_vpd_ident(vpd, page_83) < 0) {
+ off += (ident_len + 4);
+ page_len -= (ident_len + 4);
+ kfree(vpd);
+ continue;
+ }
+
+ list_add_tail(&vpd->vpd_list, &wwn->t10_vpd_list);
+ off += (ident_len + 4);
+ page_len -= (ident_len + 4);
+ }
+
+out:
+ kfree(buf);
+}
+
+/* pscsi_add_device_to_list():
+ *
+ *
+ */
+static struct se_device *pscsi_add_device_to_list(
+ struct se_hba *hba,
+ struct se_subsystem_dev *se_dev,
+ struct pscsi_dev_virt *pdv,
+ struct scsi_device *sd,
+ int dev_flags)
+{
+ struct se_device *dev;
+ struct se_dev_limits dev_limits;
+ struct request_queue *q;
+ struct queue_limits *limits;
+
+ memset(&dev_limits, 0, sizeof(struct se_dev_limits));
+
+ if (!sd->queue_depth) {
+ sd->queue_depth = PSCSI_DEFAULT_QUEUEDEPTH;
+
+ printk(KERN_ERR "Set broken SCSI Device %d:%d:%d"
+ " queue_depth to %d\n", sd->channel, sd->id,
+ sd->lun, sd->queue_depth);
+ }
+ /*
+ * Setup the local scope queue_limits from struct request_queue->limits
+ * to pass into transport_add_device_to_core_hba() as struct se_dev_limits.
+ */
+ q = sd->request_queue;
+ limits = &dev_limits.limits;
+ limits->logical_block_size = sd->sector_size;
+ limits->max_hw_sectors = (sd->host->max_sectors > queue_max_hw_sectors(q)) ?
+ queue_max_hw_sectors(q) : sd->host->max_sectors;
+ limits->max_sectors = (sd->host->max_sectors > queue_max_sectors(q)) ?
+ queue_max_sectors(q) : sd->host->max_sectors;
+ dev_limits.hw_queue_depth = sd->queue_depth;
+ dev_limits.queue_depth = sd->queue_depth;
+ /*
+ * Setup our standard INQUIRY info into se_dev->t10_wwn
+ */
+ pscsi_set_inquiry_info(sd, &se_dev->t10_wwn);
+
+ /*
+ * Set the pointer pdv->pdv_sd to from passed struct scsi_device,
+ * which has already been referenced with Linux SCSI code with
+ * scsi_device_get() in this file's pscsi_create_virtdevice().
+ *
+ * The passthrough operations called by the transport_add_device_*
+ * function below will require this pointer to be set for passthroug
+ * ops.
+ *
+ * For the shutdown case in pscsi_free_device(), this struct
+ * scsi_device reference is released with Linux SCSI code
+ * scsi_device_put() and the pdv->pdv_sd cleared.
+ */
+ pdv->pdv_sd = sd;
+
+ dev = transport_add_device_to_core_hba(hba, &pscsi_template,
+ se_dev, dev_flags, (void *)pdv,
+ &dev_limits, NULL, NULL);
+ if (!(dev)) {
+ pdv->pdv_sd = NULL;
+ return NULL;
+ }
+
+ /*
+ * Locate VPD WWN Information used for various purposes within
+ * the Storage Engine.
+ */
+ if (!pscsi_get_inquiry_vpd_serial(sd, &se_dev->t10_wwn)) {
+ /*
+ * If VPD Unit Serial returned GOOD status, try
+ * VPD Device Identification page (0x83).
+ */
+ pscsi_get_inquiry_vpd_device_ident(sd, &se_dev->t10_wwn);
+ }
+
+ /*
+ * For TYPE_TAPE, attempt to determine blocksize with MODE_SENSE.
+ */
+ if (sd->type == TYPE_TAPE)
+ pscsi_tape_read_blocksize(dev, sd);
+ return dev;
+}
+
+static void *pscsi_allocate_virtdevice(struct se_hba *hba, const char *name)
+{
+ struct pscsi_dev_virt *pdv;
+
+ pdv = kzalloc(sizeof(struct pscsi_dev_virt), GFP_KERNEL);
+ if (!(pdv)) {
+ printk(KERN_ERR "Unable to allocate memory for struct pscsi_dev_virt\n");
+ return NULL;
+ }
+ pdv->pdv_se_hba = hba;
+
+ printk(KERN_INFO "PSCSI: Allocated pdv: %p for %s\n", pdv, name);
+ return (void *)pdv;
+}
+
+/*
+ * Called with struct Scsi_Host->host_lock called.
+ */
+static struct se_device *pscsi_create_type_disk(
+ struct scsi_device *sd,
+ struct pscsi_dev_virt *pdv,
+ struct se_subsystem_dev *se_dev,
+ struct se_hba *hba)
+{
+ struct se_device *dev;
+ struct pscsi_hba_virt *phv = (struct pscsi_hba_virt *)pdv->pdv_se_hba->hba_ptr;
+ struct Scsi_Host *sh = sd->host;
+ struct block_device *bd;
+ u32 dev_flags = 0;
+
+ if (scsi_device_get(sd)) {
+ printk(KERN_ERR "scsi_device_get() failed for %d:%d:%d:%d\n",
+ sh->host_no, sd->channel, sd->id, sd->lun);
+ spin_unlock_irq(sh->host_lock);
+ return NULL;
+ }
+ spin_unlock_irq(sh->host_lock);
+ /*
+ * Claim exclusive struct block_device access to struct scsi_device
+ * for TYPE_DISK using supplied udev_path
+ */
+ bd = open_bdev_exclusive(se_dev->se_dev_udev_path,
+ FMODE_WRITE|FMODE_READ, pdv);
+ if (!(bd)) {
+ printk("pSCSI: open_bdev_exclusive() failed\n");
+ scsi_device_put(sd);
+ return NULL;
+ }
+ pdv->pdv_bd = bd;
+
+ dev = pscsi_add_device_to_list(hba, se_dev, pdv, sd, dev_flags);
+ if (!(dev)) {
+ close_bdev_exclusive(pdv->pdv_bd, FMODE_WRITE|FMODE_READ);
+ scsi_device_put(sd);
+ return NULL;
+ }
+ printk(KERN_INFO "CORE_PSCSI[%d] - Added TYPE_DISK for %d:%d:%d:%d\n",
+ phv->phv_host_id, sh->host_no, sd->channel, sd->id, sd->lun);
+
+ return dev;
+}
+
+/*
+ * Called with struct Scsi_Host->host_lock called.
+ */
+static struct se_device *pscsi_create_type_rom(
+ struct scsi_device *sd,
+ struct pscsi_dev_virt *pdv,
+ struct se_subsystem_dev *se_dev,
+ struct se_hba *hba)
+{
+ struct se_device *dev;
+ struct pscsi_hba_virt *phv = (struct pscsi_hba_virt *)pdv->pdv_se_hba->hba_ptr;
+ struct Scsi_Host *sh = sd->host;
+ u32 dev_flags = 0;
+
+ if (scsi_device_get(sd)) {
+ printk(KERN_ERR "scsi_device_get() failed for %d:%d:%d:%d\n",
+ sh->host_no, sd->channel, sd->id, sd->lun);
+ spin_unlock_irq(sh->host_lock);
+ return NULL;
+ }
+ spin_unlock_irq(sh->host_lock);
+
+ dev = pscsi_add_device_to_list(hba, se_dev, pdv, sd, dev_flags);
+ if (!(dev)) {
+ scsi_device_put(sd);
+ return NULL;
+ }
+ printk(KERN_INFO "CORE_PSCSI[%d] - Added Type: %s for %d:%d:%d:%d\n",
+ phv->phv_host_id, scsi_device_type(sd->type), sh->host_no,
+ sd->channel, sd->id, sd->lun);
+
+ return dev;
+}
+
+/*
+ *Called with struct Scsi_Host->host_lock called.
+ */
+static struct se_device *pscsi_create_type_other(
+ struct scsi_device *sd,
+ struct pscsi_dev_virt *pdv,
+ struct se_subsystem_dev *se_dev,
+ struct se_hba *hba)
+{
+ struct se_device *dev;
+ struct pscsi_hba_virt *phv = (struct pscsi_hba_virt *)pdv->pdv_se_hba->hba_ptr;
+ struct Scsi_Host *sh = sd->host;
+ u32 dev_flags = 0;
+
+ spin_unlock_irq(sh->host_lock);
+ dev = pscsi_add_device_to_list(hba, se_dev, pdv, sd, dev_flags);
+ if (!(dev))
+ return NULL;
+
+ printk(KERN_INFO "CORE_PSCSI[%d] - Added Type: %s for %d:%d:%d:%d\n",
+ phv->phv_host_id, scsi_device_type(sd->type), sh->host_no,
+ sd->channel, sd->id, sd->lun);
+
+ return dev;
+}
+
+static struct se_device *pscsi_create_virtdevice(
+ struct se_hba *hba,
+ struct se_subsystem_dev *se_dev,
+ void *p)
+{
+ struct pscsi_dev_virt *pdv = (struct pscsi_dev_virt *)p;
+ struct se_device *dev;
+ struct scsi_device *sd;
+ struct pscsi_hba_virt *phv = (struct pscsi_hba_virt *)hba->hba_ptr;
+ struct Scsi_Host *sh = phv->phv_lld_host;
+ int legacy_mode_enable = 0;
+
+ if (!(pdv)) {
+ printk(KERN_ERR "Unable to locate struct pscsi_dev_virt"
+ " parameter\n");
+ return NULL;
+ }
+ /*
+ * If not running in PHV_LLD_SCSI_HOST_NO mode, locate the
+ * struct Scsi_Host we will need to bring the TCM/pSCSI object online
+ */
+ if (!(sh)) {
+ if (phv->phv_mode == PHV_LLD_SCSI_HOST_NO) {
+ printk(KERN_ERR "pSCSI: Unable to locate struct"
+ " Scsi_Host for PHV_LLD_SCSI_HOST_NO\n");
+ return NULL;
+ }
+ /*
+ * For the newer PHV_VIRUTAL_HOST_ID struct scsi_device
+ * reference, we enforce that udev_path has been set
+ */
+ if (!(se_dev->su_dev_flags & SDF_USING_UDEV_PATH)) {
+ printk(KERN_ERR "pSCSI: udev_path attribute has not"
+ " been set before ENABLE=1\n");
+ return NULL;
+ }
+ /*
+ * If no scsi_host_id= was passed for PHV_VIRUTAL_HOST_ID,
+ * use the original TCM hba ID to reference Linux/SCSI Host No
+ * and enable for PHV_LLD_SCSI_HOST_NO mode.
+ */
+ if (!(pdv->pdv_flags & PDF_HAS_VIRT_HOST_ID)) {
+ spin_lock(&hba->device_lock);
+ if (!(list_empty(&hba->hba_dev_list))) {
+ printk(KERN_ERR "pSCSI: Unable to set hba_mode"
+ " with active devices\n");
+ spin_unlock(&hba->device_lock);
+ return NULL;
+ }
+ spin_unlock(&hba->device_lock);
+
+ if (pscsi_pmode_enable_hba(hba, 1) != 1)
+ return NULL;
+
+ legacy_mode_enable = 1;
+ hba->hba_flags |= HBA_FLAGS_PSCSI_MODE;
+ sh = phv->phv_lld_host;
+ } else {
+ sh = pscsi_get_sh(pdv->pdv_host_id);
+ if (!(sh)) {
+ printk(KERN_ERR "pSCSI: Unable to locate"
+ " pdv_host_id: %d\n", pdv->pdv_host_id);
+ return NULL;
+ }
+ }
+ } else {
+ if (phv->phv_mode == PHV_VIRUTAL_HOST_ID) {
+ printk(KERN_ERR "pSCSI: PHV_VIRUTAL_HOST_ID set while"
+ " struct Scsi_Host exists\n");
+ return NULL;
+ }
+ }
+
+ spin_lock_irq(sh->host_lock);
+ list_for_each_entry(sd, &sh->__devices, siblings) {
+ if ((pdv->pdv_channel_id != sd->channel) ||
+ (pdv->pdv_target_id != sd->id) ||
+ (pdv->pdv_lun_id != sd->lun))
+ continue;
+ /*
+ * Functions will release the held struct scsi_host->host_lock
+ * before calling calling pscsi_add_device_to_list() to register
+ * struct scsi_device with target_core_mod.
+ */
+ switch (sd->type) {
+ case TYPE_DISK:
+ dev = pscsi_create_type_disk(sd, pdv, se_dev, hba);
+ break;
+ case TYPE_ROM:
+ dev = pscsi_create_type_rom(sd, pdv, se_dev, hba);
+ break;
+ default:
+ dev = pscsi_create_type_other(sd, pdv, se_dev, hba);
+ break;
+ }
+
+ if (!(dev)) {
+ if (phv->phv_mode == PHV_VIRUTAL_HOST_ID)
+ scsi_host_put(sh);
+ else if (legacy_mode_enable) {
+ pscsi_pmode_enable_hba(hba, 0);
+ hba->hba_flags &= ~HBA_FLAGS_PSCSI_MODE;
+ }
+ pdv->pdv_sd = NULL;
+ return NULL;
+ }
+ return dev;
+ }
+ spin_unlock_irq(sh->host_lock);
+
+ printk(KERN_ERR "pSCSI: Unable to locate %d:%d:%d:%d\n", sh->host_no,
+ pdv->pdv_channel_id, pdv->pdv_target_id, pdv->pdv_lun_id);
+
+ if (phv->phv_mode == PHV_VIRUTAL_HOST_ID)
+ scsi_host_put(sh);
+ else if (legacy_mode_enable) {
+ pscsi_pmode_enable_hba(hba, 0);
+ hba->hba_flags &= ~HBA_FLAGS_PSCSI_MODE;
+ }
+
+ return NULL;
+}
+
+/* pscsi_free_device(): (Part of se_subsystem_api_t template)
+ *
+ *
+ */
+static void pscsi_free_device(void *p)
+{
+ struct pscsi_dev_virt *pdv = p;
+ struct pscsi_hba_virt *phv = pdv->pdv_se_hba->hba_ptr;
+ struct scsi_device *sd = pdv->pdv_sd;
+
+ if (sd) {
+ /*
+ * Release exclusive pSCSI internal struct block_device claim for
+ * struct scsi_device with TYPE_DISK from pscsi_create_type_disk()
+ */
+ if ((sd->type == TYPE_DISK) && pdv->pdv_bd) {
+ close_bdev_exclusive(pdv->pdv_bd,
+ FMODE_WRITE|FMODE_READ);
+ pdv->pdv_bd = NULL;
+ }
+ /*
+ * For HBA mode PHV_LLD_SCSI_HOST_NO, release the reference
+ * to struct Scsi_Host now.
+ */
+ if ((phv->phv_mode == PHV_LLD_SCSI_HOST_NO) &&
+ (phv->phv_lld_host != NULL))
+ scsi_host_put(phv->phv_lld_host);
+
+ if ((sd->type == TYPE_DISK) || (sd->type == TYPE_ROM))
+ scsi_device_put(sd);
+
+ pdv->pdv_sd = NULL;
+ }
+
+ kfree(pdv);
+}
+
+static inline struct pscsi_plugin_task *PSCSI_TASK(struct se_task *task)
+{
+ return container_of(task, struct pscsi_plugin_task, pscsi_task);
+}
+
+
+/* pscsi_transport_complete():
+ *
+ *
+ */
+static int pscsi_transport_complete(struct se_task *task)
+{
+ struct pscsi_dev_virt *pdv = task->se_dev->dev_ptr;
+ struct scsi_device *sd = pdv->pdv_sd;
+ int result;
+ struct pscsi_plugin_task *pt = PSCSI_TASK(task);
+ unsigned char *cdb = &pt->pscsi_cdb[0];
+
+ result = pt->pscsi_result;
+ /*
+ * Hack to make sure that Write-Protect modepage is set if R/O mode is
+ * forced.
+ */
+ if (((cdb[0] == MODE_SENSE) || (cdb[0] == MODE_SENSE_10)) &&
+ (status_byte(result) << 1) == SAM_STAT_GOOD) {
+ if (!TASK_CMD(task)->se_deve)
+ goto after_mode_sense;
+
+ if (TASK_CMD(task)->se_deve->lun_flags &
+ TRANSPORT_LUNFLAGS_READ_ONLY) {
+ unsigned char *buf = (unsigned char *)
+ T_TASK(task->task_se_cmd)->t_task_buf;
+
+ if (cdb[0] == MODE_SENSE_10) {
+ if (!(buf[3] & 0x80))
+ buf[3] |= 0x80;
+ } else {
+ if (!(buf[2] & 0x80))
+ buf[2] |= 0x80;
+ }
+ }
+ }
+after_mode_sense:
+
+ if (sd->type != TYPE_TAPE)
+ goto after_mode_select;
+
+ /*
+ * Hack to correctly obtain the initiator requested blocksize for
+ * TYPE_TAPE. Since this value is dependent upon each tape media,
+ * struct scsi_device->sector_size will not contain the correct value
+ * by default, so we go ahead and set it so
+ * TRANSPORT(dev)->get_blockdev() returns the correct value to the
+ * storage engine.
+ */
+ if (((cdb[0] == MODE_SELECT) || (cdb[0] == MODE_SELECT_10)) &&
+ (status_byte(result) << 1) == SAM_STAT_GOOD) {
+ unsigned char *buf;
+ struct scatterlist *sg = task->task_sg;
+ u16 bdl;
+ u32 blocksize;
+
+ buf = sg_virt(&sg[0]);
+ if (!(buf)) {
+ printk(KERN_ERR "Unable to get buf for scatterlist\n");
+ goto after_mode_select;
+ }
+
+ if (cdb[0] == MODE_SELECT)
+ bdl = (buf[3]);
+ else
+ bdl = (buf[6] << 8) | (buf[7]);
+
+ if (!bdl)
+ goto after_mode_select;
+
+ if (cdb[0] == MODE_SELECT)
+ blocksize = (buf[9] << 16) | (buf[10] << 8) |
+ (buf[11]);
+ else
+ blocksize = (buf[13] << 16) | (buf[14] << 8) |
+ (buf[15]);
+
+ sd->sector_size = blocksize;
+ }
+after_mode_select:
+
+ if (status_byte(result) & CHECK_CONDITION)
+ return 1;
+
+ return 0;
+}
+
+static struct se_task *
+pscsi_alloc_task(struct se_cmd *cmd)
+{
+ struct pscsi_plugin_task *pt;
+ unsigned char *cdb = T_TASK(cmd)->t_task_cdb;
+
+ pt = kzalloc(sizeof(struct pscsi_plugin_task), GFP_KERNEL);
+ if (!pt) {
+ printk(KERN_ERR "Unable to allocate struct pscsi_plugin_task\n");
+ return NULL;
+ }
+
+ /*
+ * If TCM Core is signaling a > TCM_MAX_COMMAND_SIZE allocation,
+ * allocate the extended CDB buffer for per struct se_task context
+ * pt->pscsi_cdb now.
+ */
+ if (T_TASK(cmd)->t_task_cdb != T_TASK(cmd)->__t_task_cdb) {
+
+ pt->pscsi_cdb = kzalloc(scsi_command_size(cdb), GFP_KERNEL);
+ if (!(pt->pscsi_cdb)) {
+ printk(KERN_ERR "pSCSI: Unable to allocate extended"
+ " pt->pscsi_cdb\n");
+ return NULL;
+ }
+ } else
+ pt->pscsi_cdb = &pt->__pscsi_cdb[0];
+
+ return &pt->pscsi_task;
+}
+
+static inline void pscsi_blk_init_request(
+ struct se_task *task,
+ struct pscsi_plugin_task *pt,
+ struct request *req,
+ int bidi_read)
+{
+ /*
+ * Defined as "scsi command" in include/linux/blkdev.h.
+ */
+ req->cmd_type = REQ_TYPE_BLOCK_PC;
+ /*
+ * For the extra BIDI-COMMAND READ struct request we do not
+ * need to setup the remaining structure members
+ */
+ if (bidi_read)
+ return;
+ /*
+ * Setup the done function pointer for struct request,
+ * also set the end_io_data pointer.to struct se_task.
+ */
+ req->end_io = pscsi_req_done;
+ req->end_io_data = (void *)task;
+ /*
+ * Load the referenced struct se_task's SCSI CDB into
+ * include/linux/blkdev.h:struct request->cmd
+ */
+ req->cmd_len = scsi_command_size(pt->pscsi_cdb);
+ req->cmd = &pt->pscsi_cdb[0];
+ /*
+ * Setup pointer for outgoing sense data.
+ */
+ req->sense = (void *)&pt->pscsi_sense[0];
+ req->sense_len = 0;
+}
+
+/*
+ * Used for pSCSI data payloads for all *NON* SCF_SCSI_DATA_SG_IO_CDB
+*/
+static int pscsi_blk_get_request(struct se_task *task)
+{
+ struct pscsi_plugin_task *pt = PSCSI_TASK(task);
+ struct pscsi_dev_virt *pdv = task->se_dev->dev_ptr;
+
+ pt->pscsi_req = blk_get_request(pdv->pdv_sd->request_queue,
+ (task->task_data_direction == DMA_TO_DEVICE),
+ GFP_KERNEL);
+ if (!(pt->pscsi_req) || IS_ERR(pt->pscsi_req)) {
+ printk(KERN_ERR "PSCSI: blk_get_request() failed: %ld\n",
+ IS_ERR(pt->pscsi_req));
+ return PYX_TRANSPORT_LU_COMM_FAILURE;
+ }
+ /*
+ * Setup the newly allocated struct request for REQ_TYPE_BLOCK_PC,
+ * and setup rq callback, CDB and sense.
+ */
+ pscsi_blk_init_request(task, pt, pt->pscsi_req, 0);
+ return 0;
+}
+
+/* pscsi_do_task(): (Part of se_subsystem_api_t template)
+ *
+ *
+ */
+static int pscsi_do_task(struct se_task *task)
+{
+ struct pscsi_plugin_task *pt = PSCSI_TASK(task);
+ struct pscsi_dev_virt *pdv = task->se_dev->dev_ptr;
+ /*
+ * Set the struct request->timeout value based on peripheral
+ * device type from SCSI.
+ */
+ if (pdv->pdv_sd->type == TYPE_DISK)
+ pt->pscsi_req->timeout = PS_TIMEOUT_DISK;
+ else
+ pt->pscsi_req->timeout = PS_TIMEOUT_OTHER;
+
+ pt->pscsi_req->retries = PS_RETRY;
+ /*
+ * Queue the struct request into the struct scsi_device->request_queue.
+ * Also check for HEAD_OF_QUEUE SAM TASK attr from received se_cmd
+ * descriptor
+ */
+ blk_execute_rq_nowait(pdv->pdv_sd->request_queue, NULL, pt->pscsi_req,
+ (task->task_se_cmd->sam_task_attr == TASK_ATTR_HOQ),
+ pscsi_req_done);
+
+ return PYX_TRANSPORT_SENT_TO_TRANSPORT;
+}
+
+static void pscsi_free_task(struct se_task *task)
+{
+ struct pscsi_plugin_task *pt = PSCSI_TASK(task);
+ struct se_cmd *cmd = task->task_se_cmd;
+
+ /*
+ * Release the extended CDB allocation from pscsi_alloc_task()
+ * if one exists.
+ */
+ if (T_TASK(cmd)->t_task_cdb != T_TASK(cmd)->__t_task_cdb)
+ kfree(pt->pscsi_cdb);
+ /*
+ * We do not release the bio(s) here associated with this task, as
+ * this is handled by bio_put() and pscsi_bi_endio().
+ */
+ kfree(pt);
+}
+
+enum {
+ Opt_scsi_host_id, Opt_scsi_channel_id, Opt_scsi_target_id,
+ Opt_scsi_lun_id, Opt_err
+};
+
+static match_table_t tokens = {
+ {Opt_scsi_host_id, "scsi_host_id=%d"},
+ {Opt_scsi_channel_id, "scsi_channel_id=%d"},
+ {Opt_scsi_target_id, "scsi_target_id=%d"},
+ {Opt_scsi_lun_id, "scsi_lun_id=%d"},
+ {Opt_err, NULL}
+};
+
+static ssize_t pscsi_set_configfs_dev_params(struct se_hba *hba,
+ struct se_subsystem_dev *se_dev,
+ const char *page,
+ ssize_t count)
+{
+ struct pscsi_dev_virt *pdv = se_dev->se_dev_su_ptr;
+ struct pscsi_hba_virt *phv = hba->hba_ptr;
+ char *orig, *ptr, *opts;
+ substring_t args[MAX_OPT_ARGS];
+ int ret = 0, arg, token;
+
+ opts = kstrdup(page, GFP_KERNEL);
+ if (!opts)
+ return -ENOMEM;
+
+ orig = opts;
+
+ while ((ptr = strsep(&opts, ",")) != NULL) {
+ if (!*ptr)
+ continue;
+
+ token = match_token(ptr, tokens, args);
+ switch (token) {
+ case Opt_scsi_host_id:
+ if (phv->phv_mode == PHV_LLD_SCSI_HOST_NO) {
+ printk(KERN_ERR "PSCSI[%d]: Unable to accept"
+ " scsi_host_id while phv_mode =="
+ " PHV_LLD_SCSI_HOST_NO\n",
+ phv->phv_host_id);
+ ret = -EINVAL;
+ goto out;
+ }
+ match_int(args, &arg);
+ pdv->pdv_host_id = arg;
+ printk(KERN_INFO "PSCSI[%d]: Referencing SCSI Host ID:"
+ " %d\n", phv->phv_host_id, pdv->pdv_host_id);
+ pdv->pdv_flags |= PDF_HAS_VIRT_HOST_ID;
+ break;
+ case Opt_scsi_channel_id:
+ match_int(args, &arg);
+ pdv->pdv_channel_id = arg;
+ printk(KERN_INFO "PSCSI[%d]: Referencing SCSI Channel"
+ " ID: %d\n", phv->phv_host_id,
+ pdv->pdv_channel_id);
+ pdv->pdv_flags |= PDF_HAS_CHANNEL_ID;
+ break;
+ case Opt_scsi_target_id:
+ match_int(args, &arg);
+ pdv->pdv_target_id = arg;
+ printk(KERN_INFO "PSCSI[%d]: Referencing SCSI Target"
+ " ID: %d\n", phv->phv_host_id,
+ pdv->pdv_target_id);
+ pdv->pdv_flags |= PDF_HAS_TARGET_ID;
+ break;
+ case Opt_scsi_lun_id:
+ match_int(args, &arg);
+ pdv->pdv_lun_id = arg;
+ printk(KERN_INFO "PSCSI[%d]: Referencing SCSI LUN ID:"
+ " %d\n", phv->phv_host_id, pdv->pdv_lun_id);
+ pdv->pdv_flags |= PDF_HAS_LUN_ID;
+ break;
+ default:
+ break;
+ }
+ }
+
+out:
+ kfree(orig);
+ return (!ret) ? count : ret;
+}
+
+static ssize_t pscsi_check_configfs_dev_params(
+ struct se_hba *hba,
+ struct se_subsystem_dev *se_dev)
+{
+ struct pscsi_dev_virt *pdv = se_dev->se_dev_su_ptr;
+
+ if (!(pdv->pdv_flags & PDF_HAS_CHANNEL_ID) ||
+ !(pdv->pdv_flags & PDF_HAS_TARGET_ID) ||
+ !(pdv->pdv_flags & PDF_HAS_LUN_ID)) {
+ printk(KERN_ERR "Missing scsi_channel_id=, scsi_target_id= and"
+ " scsi_lun_id= parameters\n");
+ return -1;
+ }
+
+ return 0;
+}
+
+static ssize_t pscsi_show_configfs_dev_params(
+ struct se_hba *hba,
+ struct se_subsystem_dev *se_dev,
+ char *b)
+{
+ struct pscsi_hba_virt *phv = hba->hba_ptr;
+ struct pscsi_dev_virt *pdv = se_dev->se_dev_su_ptr;
+ struct scsi_device *sd = pdv->pdv_sd;
+ unsigned char host_id[16];
+ ssize_t bl;
+ int i;
+
+ if (phv->phv_mode == PHV_VIRUTAL_HOST_ID)
+ snprintf(host_id, 16, "%d", pdv->pdv_host_id);
+ else
+ snprintf(host_id, 16, "PHBA Mode");
+
+ bl = sprintf(b, "SCSI Device Bus Location:"
+ " Channel ID: %d Target ID: %d LUN: %d Host ID: %s\n",
+ pdv->pdv_channel_id, pdv->pdv_target_id, pdv->pdv_lun_id,
+ host_id);
+
+ if (sd) {
+ bl += sprintf(b + bl, " ");
+ bl += sprintf(b + bl, "Vendor: ");
+ for (i = 0; i < 8; i++) {
+ if (ISPRINT(sd->vendor[i])) /* printable character? */
+ bl += sprintf(b + bl, "%c", sd->vendor[i]);
+ else
+ bl += sprintf(b + bl, " ");
+ }
+ bl += sprintf(b + bl, " Model: ");
+ for (i = 0; i < 16; i++) {
+ if (ISPRINT(sd->model[i])) /* printable character ? */
+ bl += sprintf(b + bl, "%c", sd->model[i]);
+ else
+ bl += sprintf(b + bl, " ");
+ }
+ bl += sprintf(b + bl, " Rev: ");
+ for (i = 0; i < 4; i++) {
+ if (ISPRINT(sd->rev[i])) /* printable character ? */
+ bl += sprintf(b + bl, "%c", sd->rev[i]);
+ else
+ bl += sprintf(b + bl, " ");
+ }
+ bl += sprintf(b + bl, "\n");
+ }
+ return bl;
+}
+
+static void pscsi_bi_endio(struct bio *bio, int error)
+{
+ bio_put(bio);
+}
+
+static inline struct bio *pscsi_get_bio(struct pscsi_dev_virt *pdv, int sg_num)
+{
+ struct bio *bio;
+ /*
+ * Use bio_malloc() following the comment in for bio -> struct request
+ * in block/blk-core.c:blk_make_request()
+ */
+ bio = bio_kmalloc(GFP_KERNEL, sg_num);
+ if (!(bio)) {
+ printk(KERN_ERR "PSCSI: bio_kmalloc() failed\n");
+ return NULL;
+ }
+ bio->bi_end_io = pscsi_bi_endio;
+
+ return bio;
+}
+
+#if 0
+#define DEBUG_PSCSI(x...) printk(x)
+#else
+#define DEBUG_PSCSI(x...)
+#endif
+
+static int __pscsi_map_task_SG(
+ struct se_task *task,
+ struct scatterlist *task_sg,
+ u32 task_sg_num,
+ int bidi_read)
+{
+ struct pscsi_plugin_task *pt = PSCSI_TASK(task);
+ struct pscsi_dev_virt *pdv = task->se_dev->dev_ptr;
+ struct bio *bio = NULL, *hbio = NULL, *tbio = NULL;
+ struct page *page;
+ struct scatterlist *sg;
+ u32 data_len = task->task_size, i, len, bytes, off;
+ int nr_pages = (task->task_size + task_sg[0].offset +
+ PAGE_SIZE - 1) >> PAGE_SHIFT;
+ int nr_vecs = 0, rc, ret = PYX_TRANSPORT_OUT_OF_MEMORY_RESOURCES;
+ int rw = (task->task_data_direction == DMA_TO_DEVICE);
+
+ if (!task->task_size)
+ return 0;
+ /*
+ * For SCF_SCSI_DATA_SG_IO_CDB, Use fs/bio.c:bio_add_page() to setup
+ * the bio_vec maplist from TC< struct se_mem -> task->task_sg ->
+ * struct scatterlist memory. The struct se_task->task_sg[] currently needs
+ * to be attached to struct bios for submission to Linux/SCSI using
+ * struct request to struct scsi_device->request_queue.
+ *
+ * Note that this will be changing post v2.6.28 as Target_Core_Mod/pSCSI
+ * is ported to upstream SCSI passthrough functionality that accepts
+ * struct scatterlist->page_link or struct page as a paraemeter.
+ */
+ DEBUG_PSCSI("PSCSI: nr_pages: %d\n", nr_pages);
+
+ for_each_sg(task_sg, sg, task_sg_num, i) {
+ page = sg_page(sg);
+ off = sg->offset;
+ len = sg->length;
+
+ DEBUG_PSCSI("PSCSI: i: %d page: %p len: %d off: %d\n", i,
+ page, len, off);
+
+ while (len > 0 && data_len > 0) {
+ bytes = min_t(unsigned int, len, PAGE_SIZE - off);
+ bytes = min(bytes, data_len);
+
+ if (!(bio)) {
+ nr_vecs = min_t(int, BIO_MAX_PAGES, nr_pages);
+ nr_pages -= nr_vecs;
+ /*
+ * Calls bio_kmalloc() and sets bio->bi_end_io()
+ */
+ bio = pscsi_get_bio(pdv, nr_vecs);
+ if (!(bio))
+ goto fail;
+
+ if (rw)
+ bio->bi_rw |= REQ_WRITE;
+
+ DEBUG_PSCSI("PSCSI: Allocated bio: %p,"
+ " dir: %s nr_vecs: %d\n", bio,
+ (rw) ? "rw" : "r", nr_vecs);
+ /*
+ * Set *hbio pointer to handle the case:
+ * nr_pages > BIO_MAX_PAGES, where additional
+ * bios need to be added to complete a given
+ * struct se_task
+ */
+ if (!hbio)
+ hbio = tbio = bio;
+ else
+ tbio = tbio->bi_next = bio;
+ }
+
+ DEBUG_PSCSI("PSCSI: Calling bio_add_pc_page() i: %d"
+ " bio: %p page: %p len: %d off: %d\n", i, bio,
+ page, len, off);
+
+ rc = bio_add_pc_page(pdv->pdv_sd->request_queue,
+ bio, page, bytes, off);
+ if (rc != bytes)
+ goto fail;
+
+ DEBUG_PSCSI("PSCSI: bio->bi_vcnt: %d nr_vecs: %d\n",
+ bio->bi_vcnt, nr_vecs);
+
+ if (bio->bi_vcnt > nr_vecs) {
+ DEBUG_PSCSI("PSCSI: Reached bio->bi_vcnt max:"
+ " %d i: %d bio: %p, allocating another"
+ " bio\n", bio->bi_vcnt, i, bio);
+ /*
+ * Clear the pointer so that another bio will
+ * be allocated with pscsi_get_bio() above, the
+ * current bio has already been set *tbio and
+ * bio->bi_next.
+ */
+ bio = NULL;
+ }
+
+ page++;
+ len -= bytes;
+ data_len -= bytes;
+ off = 0;
+ }
+ }
+ /*
+ * Setup the primary pt->pscsi_req used for non BIDI and BIDI-COMMAND
+ * primary SCSI WRITE poayload mapped for struct se_task->task_sg[]
+ */
+ if (!(bidi_read)) {
+ /*
+ * Starting with v2.6.31, call blk_make_request() passing in *hbio to
+ * allocate the pSCSI task a struct request.
+ */
+ pt->pscsi_req = blk_make_request(pdv->pdv_sd->request_queue,
+ hbio, GFP_KERNEL);
+ if (!(pt->pscsi_req)) {
+ printk(KERN_ERR "pSCSI: blk_make_request() failed\n");
+ goto fail;
+ }
+ /*
+ * Setup the newly allocated struct request for REQ_TYPE_BLOCK_PC,
+ * and setup rq callback, CDB and sense.
+ */
+ pscsi_blk_init_request(task, pt, pt->pscsi_req, 0);
+
+ return task->task_sg_num;
+ }
+ /*
+ * Setup the secondary pt->pscsi_req->next_rq used for the extra BIDI-COMMAND
+ * SCSI READ paylaod mapped for struct se_task->task_sg_bidi[]
+ */
+ pt->pscsi_req->next_rq = blk_make_request(pdv->pdv_sd->request_queue,
+ hbio, GFP_KERNEL);
+ if (!(pt->pscsi_req->next_rq)) {
+ printk(KERN_ERR "pSCSI: blk_make_request() failed for BIDI\n");
+ goto fail;
+ }
+ pscsi_blk_init_request(task, pt, pt->pscsi_req->next_rq, 1);
+
+ return task->task_sg_num;
+fail:
+ while (hbio) {
+ bio = hbio;
+ hbio = hbio->bi_next;
+ bio->bi_next = NULL;
+ bio_endio(bio, 0);
+ }
+ return ret;
+}
+
+static int pscsi_map_task_SG(struct se_task *task)
+{
+ int ret;
+
+ /*
+ * Setup the main struct request for the task->task_sg[] payload
+ */
+
+ ret = __pscsi_map_task_SG(task, task->task_sg, task->task_sg_num, 0);
+ if (ret >= 0 && task->task_sg_bidi) {
+ /*
+ * If present, set up the extra BIDI-COMMAND SCSI READ
+ * struct request and payload.
+ */
+ ret = __pscsi_map_task_SG(task, task->task_sg_bidi,
+ task->task_sg_num, 1);
+ }
+
+ if (ret < 0)
+ return PYX_TRANSPORT_LU_COMM_FAILURE;
+ return 0;
+}
+
+/* pscsi_map_task_non_SG():
+ *
+ *
+ */
+static int pscsi_map_task_non_SG(struct se_task *task)
+{
+ struct se_cmd *cmd = TASK_CMD(task);
+ struct pscsi_plugin_task *pt = PSCSI_TASK(task);
+ struct pscsi_dev_virt *pdv = task->se_dev->dev_ptr;
+ int ret = 0;
+
+ if (pscsi_blk_get_request(task) < 0)
+ return PYX_TRANSPORT_LU_COMM_FAILURE;
+
+ if (!task->task_size)
+ return 0;
+
+ ret = blk_rq_map_kern(pdv->pdv_sd->request_queue,
+ pt->pscsi_req, T_TASK(cmd)->t_task_buf,
+ task->task_size, GFP_KERNEL);
+ if (ret < 0) {
+ printk(KERN_ERR "PSCSI: blk_rq_map_kern() failed: %d\n", ret);
+ return PYX_TRANSPORT_LU_COMM_FAILURE;
+ }
+ return 0;
+}
+
+static int pscsi_CDB_none(struct se_task *task)
+{
+ return pscsi_blk_get_request(task);
+}
+
+/* pscsi_get_cdb():
+ *
+ *
+ */
+static unsigned char *pscsi_get_cdb(struct se_task *task)
+{
+ struct pscsi_plugin_task *pt = PSCSI_TASK(task);
+
+ return pt->pscsi_cdb;
+}
+
+/* pscsi_get_sense_buffer():
+ *
+ *
+ */
+static unsigned char *pscsi_get_sense_buffer(struct se_task *task)
+{
+ struct pscsi_plugin_task *pt = PSCSI_TASK(task);
+
+ return (unsigned char *)&pt->pscsi_sense[0];
+}
+
+/* pscsi_get_device_rev():
+ *
+ *
+ */
+static u32 pscsi_get_device_rev(struct se_device *dev)
+{
+ struct pscsi_dev_virt *pdv = dev->dev_ptr;
+ struct scsi_device *sd = pdv->pdv_sd;
+
+ return (sd->scsi_level - 1) ? sd->scsi_level - 1 : 1;
+}
+
+/* pscsi_get_device_type():
+ *
+ *
+ */
+static u32 pscsi_get_device_type(struct se_device *dev)
+{
+ struct pscsi_dev_virt *pdv = dev->dev_ptr;
+ struct scsi_device *sd = pdv->pdv_sd;
+
+ return sd->type;
+}
+
+static sector_t pscsi_get_blocks(struct se_device *dev)
+{
+ struct pscsi_dev_virt *pdv = dev->dev_ptr;
+
+ if (pdv->pdv_bd && pdv->pdv_bd->bd_part)
+ return pdv->pdv_bd->bd_part->nr_sects;
+
+ dump_stack();
+ return 0;
+}
+
+/* pscsi_handle_SAM_STATUS_failures():
+ *
+ *
+ */
+static inline void pscsi_process_SAM_status(
+ struct se_task *task,
+ struct pscsi_plugin_task *pt)
+{
+ task->task_scsi_status = status_byte(pt->pscsi_result);
+ if ((task->task_scsi_status)) {
+ task->task_scsi_status <<= 1;
+ printk(KERN_INFO "PSCSI Status Byte exception at task: %p CDB:"
+ " 0x%02x Result: 0x%08x\n", task, pt->pscsi_cdb[0],
+ pt->pscsi_result);
+ }
+
+ switch (host_byte(pt->pscsi_result)) {
+ case DID_OK:
+ transport_complete_task(task, (!task->task_scsi_status));
+ break;
+ default:
+ printk(KERN_INFO "PSCSI Host Byte exception at task: %p CDB:"
+ " 0x%02x Result: 0x%08x\n", task, pt->pscsi_cdb[0],
+ pt->pscsi_result);
+ task->task_scsi_status = SAM_STAT_CHECK_CONDITION;
+ task->task_error_status = PYX_TRANSPORT_UNKNOWN_SAM_OPCODE;
+ TASK_CMD(task)->transport_error_status =
+ PYX_TRANSPORT_UNKNOWN_SAM_OPCODE;
+ transport_complete_task(task, 0);
+ break;
+ }
+
+ return;
+}
+
+static void pscsi_req_done(struct request *req, int uptodate)
+{
+ struct se_task *task = req->end_io_data;
+ struct pscsi_plugin_task *pt = PSCSI_TASK(task);
+
+ pt->pscsi_result = req->errors;
+ pt->pscsi_resid = req->resid_len;
+
+ pscsi_process_SAM_status(task, pt);
+ /*
+ * Release BIDI-READ if present
+ */
+ if (req->next_rq != NULL)
+ __blk_put_request(req->q, req->next_rq);
+
+ __blk_put_request(req->q, req);
+ pt->pscsi_req = NULL;
+}
+
+static struct se_subsystem_api pscsi_template = {
+ .name = "pscsi",
+ .owner = THIS_MODULE,
+ .transport_type = TRANSPORT_PLUGIN_PHBA_PDEV,
+ .cdb_none = pscsi_CDB_none,
+ .map_task_non_SG = pscsi_map_task_non_SG,
+ .map_task_SG = pscsi_map_task_SG,
+ .attach_hba = pscsi_attach_hba,
+ .detach_hba = pscsi_detach_hba,
+ .pmode_enable_hba = pscsi_pmode_enable_hba,
+ .allocate_virtdevice = pscsi_allocate_virtdevice,
+ .create_virtdevice = pscsi_create_virtdevice,
+ .free_device = pscsi_free_device,
+ .transport_complete = pscsi_transport_complete,
+ .alloc_task = pscsi_alloc_task,
+ .do_task = pscsi_do_task,
+ .free_task = pscsi_free_task,
+ .check_configfs_dev_params = pscsi_check_configfs_dev_params,
+ .set_configfs_dev_params = pscsi_set_configfs_dev_params,
+ .show_configfs_dev_params = pscsi_show_configfs_dev_params,
+ .get_cdb = pscsi_get_cdb,
+ .get_sense_buffer = pscsi_get_sense_buffer,
+ .get_device_rev = pscsi_get_device_rev,
+ .get_device_type = pscsi_get_device_type,
+ .get_blocks = pscsi_get_blocks,
+};
+
+static int __init pscsi_module_init(void)
+{
+ return transport_subsystem_register(&pscsi_template);
+}
+
+static void pscsi_module_exit(void)
+{
+ transport_subsystem_release(&pscsi_template);
+}
+
+MODULE_DESCRIPTION("TCM PSCSI subsystem plugin");
+MODULE_AUTHOR("nab@Linux-iSCSI.org");
+MODULE_LICENSE("GPL");
+
+module_init(pscsi_module_init);
+module_exit(pscsi_module_exit);
diff --git a/drivers/target/target_core_pscsi.h b/drivers/target/target_core_pscsi.h
new file mode 100644
index 0000000..a4cd5d3
--- /dev/null
+++ b/drivers/target/target_core_pscsi.h
@@ -0,0 +1,65 @@
+#ifndef TARGET_CORE_PSCSI_H
+#define TARGET_CORE_PSCSI_H
+
+#define PSCSI_VERSION "v4.0"
+#define PSCSI_VIRTUAL_HBA_DEPTH 2048
+
+/* used in pscsi_find_alloc_len() */
+#ifndef INQUIRY_DATA_SIZE
+#define INQUIRY_DATA_SIZE 0x24
+#endif
+
+/* used in pscsi_add_device_to_list() */
+#define PSCSI_DEFAULT_QUEUEDEPTH 1
+
+#define PS_RETRY 5
+#define PS_TIMEOUT_DISK (15*HZ)
+#define PS_TIMEOUT_OTHER (500*HZ)
+
+#include <linux/device.h>
+#include <scsi/scsi_driver.h>
+#include <scsi/scsi_device.h>
+#include <linux/kref.h>
+#include <linux/kobject.h>
+
+struct pscsi_plugin_task {
+ struct se_task pscsi_task;
+ unsigned char *pscsi_cdb;
+ unsigned char __pscsi_cdb[TCM_MAX_COMMAND_SIZE];
+ unsigned char pscsi_sense[SCSI_SENSE_BUFFERSIZE];
+ int pscsi_direction;
+ int pscsi_result;
+ u32 pscsi_resid;
+ struct request *pscsi_req;
+} ____cacheline_aligned;
+
+#define PDF_HAS_CHANNEL_ID 0x01
+#define PDF_HAS_TARGET_ID 0x02
+#define PDF_HAS_LUN_ID 0x04
+#define PDF_HAS_VPD_UNIT_SERIAL 0x08
+#define PDF_HAS_VPD_DEV_IDENT 0x10
+#define PDF_HAS_VIRT_HOST_ID 0x20
+
+struct pscsi_dev_virt {
+ int pdv_flags;
+ int pdv_host_id;
+ int pdv_channel_id;
+ int pdv_target_id;
+ int pdv_lun_id;
+ struct block_device *pdv_bd;
+ struct scsi_device *pdv_sd;
+ struct se_hba *pdv_se_hba;
+} ____cacheline_aligned;
+
+typedef enum phv_modes {
+ PHV_VIRUTAL_HOST_ID,
+ PHV_LLD_SCSI_HOST_NO
+} phv_modes_t;
+
+struct pscsi_hba_virt {
+ int phv_host_id;
+ phv_modes_t phv_mode;
+ struct Scsi_Host *phv_lld_host;
+} ____cacheline_aligned;
+
+#endif /*** TARGET_CORE_PSCSI_H ***/
--
1.7.3.4
^ permalink raw reply related [flat|nested] 22+ messages in thread* [PATCH v2 02p/03] target: Add RAMDISK_DR and RAMDISK_MCP subsystem plugins
2010-12-17 21:11 [PATCH v2 00/03] target: Initial merge of v4.0.0-rc6 for .38 Nicholas A. Bellinger
` (15 preceding siblings ...)
2010-12-17 21:11 ` [PATCH v2 02o/03] target: Add PSCSI " Nicholas A. Bellinger
@ 2010-12-17 21:11 ` Nicholas A. Bellinger
2010-12-17 21:11 ` [PATCH v2 02q/03] target: Add generic fabric independent ConfigFS infrastructure Nicholas A. Bellinger
` (3 subsequent siblings)
20 siblings, 0 replies; 22+ messages in thread
From: Nicholas A. Bellinger @ 2010-12-17 21:11 UTC (permalink / raw)
To: linux-scsi, James Bottomley; +Cc: Nicholas Bellinger
From: Nicholas Bellinger <nab@linux-iscsi.org>
This patch adds the RAMDISK_DR (memory map) and RAMDISK_MCP (memcpy) subsystem plugin
for accessing internally allocated struct scatterlist memory as a TCM storage object.
Note that this is the only TCM subsystem plugin that is still built into target_core_mod.ko
Signed-off-by: Nicholas A. Bellinger <nab@linux-iscsi.org>
---
drivers/target/target_core_rd.c | 1091 +++++++++++++++++++++++++++++++++++++++
drivers/target/target_core_rd.h | 73 +++
2 files changed, 1164 insertions(+), 0 deletions(-)
create mode 100644 drivers/target/target_core_rd.c
create mode 100644 drivers/target/target_core_rd.h
diff --git a/drivers/target/target_core_rd.c b/drivers/target/target_core_rd.c
new file mode 100644
index 0000000..979aebf
--- /dev/null
+++ b/drivers/target/target_core_rd.c
@@ -0,0 +1,1091 @@
+/*******************************************************************************
+ * Filename: target_core_rd.c
+ *
+ * This file contains the Storage Engine <-> Ramdisk transport
+ * specific functions.
+ *
+ * Copyright (c) 2003, 2004, 2005 PyX Technologies, Inc.
+ * Copyright (c) 2005, 2006, 2007 SBE, Inc.
+ * Copyright (c) 2007-2010 Rising Tide Systems
+ * Copyright (c) 2008-2010 Linux-iSCSI.org
+ *
+ * Nicholas A. Bellinger <nab@kernel.org>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+ *
+ ******************************************************************************/
+
+#include <linux/version.h>
+#include <linux/string.h>
+#include <linux/parser.h>
+#include <linux/timer.h>
+#include <linux/blkdev.h>
+#include <linux/slab.h>
+#include <linux/spinlock.h>
+#include <linux/smp_lock.h>
+#include <scsi/scsi.h>
+#include <scsi/scsi_host.h>
+
+#include <target/target_core_base.h>
+#include <target/target_core_device.h>
+#include <target/target_core_transport.h>
+#include <target/target_core_fabric_ops.h>
+
+#include "target_core_rd.h"
+
+static struct se_subsystem_api rd_dr_template;
+static struct se_subsystem_api rd_mcp_template;
+
+/* #define DEBUG_RAMDISK_MCP */
+/* #define DEBUG_RAMDISK_DR */
+
+/* rd_attach_hba(): (Part of se_subsystem_api_t template)
+ *
+ *
+ */
+static int rd_attach_hba(struct se_hba *hba, u32 host_id)
+{
+ struct rd_host *rd_host;
+
+ rd_host = kzalloc(sizeof(struct rd_host), GFP_KERNEL);
+ if (!(rd_host)) {
+ printk(KERN_ERR "Unable to allocate memory for struct rd_host\n");
+ return -ENOMEM;
+ }
+
+ rd_host->rd_host_id = host_id;
+
+ atomic_set(&hba->left_queue_depth, RD_HBA_QUEUE_DEPTH);
+ atomic_set(&hba->max_queue_depth, RD_HBA_QUEUE_DEPTH);
+ hba->hba_ptr = (void *) rd_host;
+
+ printk(KERN_INFO "CORE_HBA[%d] - TCM Ramdisk HBA Driver %s on"
+ " Generic Target Core Stack %s\n", hba->hba_id,
+ RD_HBA_VERSION, TARGET_CORE_MOD_VERSION);
+ printk(KERN_INFO "CORE_HBA[%d] - Attached Ramdisk HBA: %u to Generic"
+ " Target Core TCQ Depth: %d MaxSectors: %u\n", hba->hba_id,
+ rd_host->rd_host_id, atomic_read(&hba->max_queue_depth),
+ RD_MAX_SECTORS);
+
+ return 0;
+}
+
+static void rd_detach_hba(struct se_hba *hba)
+{
+ struct rd_host *rd_host = hba->hba_ptr;
+
+ printk(KERN_INFO "CORE_HBA[%d] - Detached Ramdisk HBA: %u from"
+ " Generic Target Core\n", hba->hba_id, rd_host->rd_host_id);
+
+ kfree(rd_host);
+ hba->hba_ptr = NULL;
+}
+
+/* rd_release_device_space():
+ *
+ *
+ */
+static void rd_release_device_space(struct rd_dev *rd_dev)
+{
+ u32 i, j, page_count = 0, sg_per_table;
+ struct rd_dev_sg_table *sg_table;
+ struct page *pg;
+ struct scatterlist *sg;
+
+ if (!rd_dev->sg_table_array || !rd_dev->sg_table_count)
+ return;
+
+ sg_table = rd_dev->sg_table_array;
+
+ for (i = 0; i < rd_dev->sg_table_count; i++) {
+ sg = sg_table[i].sg_table;
+ sg_per_table = sg_table[i].rd_sg_count;
+
+ for (j = 0; j < sg_per_table; j++) {
+ pg = sg_page(&sg[j]);
+ if ((pg)) {
+ __free_page(pg);
+ page_count++;
+ }
+ }
+
+ kfree(sg);
+ }
+
+ printk(KERN_INFO "CORE_RD[%u] - Released device space for Ramdisk"
+ " Device ID: %u, pages %u in %u tables total bytes %lu\n",
+ rd_dev->rd_host->rd_host_id, rd_dev->rd_dev_id, page_count,
+ rd_dev->sg_table_count, (unsigned long)page_count * PAGE_SIZE);
+
+ kfree(sg_table);
+ rd_dev->sg_table_array = NULL;
+ rd_dev->sg_table_count = 0;
+}
+
+
+/* rd_build_device_space():
+ *
+ *
+ */
+static int rd_build_device_space(struct rd_dev *rd_dev)
+{
+ u32 i = 0, j, page_offset = 0, sg_per_table, sg_tables, total_sg_needed;
+ u32 max_sg_per_table = (RD_MAX_ALLOCATION_SIZE /
+ sizeof(struct scatterlist));
+ struct rd_dev_sg_table *sg_table;
+ struct page *pg;
+ struct scatterlist *sg;
+
+ if (rd_dev->rd_page_count <= 0) {
+ printk(KERN_ERR "Illegal page count: %u for Ramdisk device\n",
+ rd_dev->rd_page_count);
+ return -1;
+ }
+ total_sg_needed = rd_dev->rd_page_count;
+
+ sg_tables = (total_sg_needed / max_sg_per_table) + 1;
+
+ sg_table = kzalloc(sg_tables * sizeof(struct rd_dev_sg_table), GFP_KERNEL);
+ if (!(sg_table)) {
+ printk(KERN_ERR "Unable to allocate memory for Ramdisk"
+ " scatterlist tables\n");
+ return -1;
+ }
+
+ rd_dev->sg_table_array = sg_table;
+ rd_dev->sg_table_count = sg_tables;
+
+ while (total_sg_needed) {
+ sg_per_table = (total_sg_needed > max_sg_per_table) ?
+ max_sg_per_table : total_sg_needed;
+
+ sg = kzalloc(sg_per_table * sizeof(struct scatterlist),
+ GFP_KERNEL);
+ if (!(sg)) {
+ printk(KERN_ERR "Unable to allocate scatterlist array"
+ " for struct rd_dev\n");
+ return -1;
+ }
+
+ sg_init_table((struct scatterlist *)&sg[0], sg_per_table);
+
+ sg_table[i].sg_table = sg;
+ sg_table[i].rd_sg_count = sg_per_table;
+ sg_table[i].page_start_offset = page_offset;
+ sg_table[i++].page_end_offset = (page_offset + sg_per_table)
+ - 1;
+
+ for (j = 0; j < sg_per_table; j++) {
+ pg = alloc_pages(GFP_KERNEL, 0);
+ if (!(pg)) {
+ printk(KERN_ERR "Unable to allocate scatterlist"
+ " pages for struct rd_dev_sg_table\n");
+ return -1;
+ }
+ sg_assign_page(&sg[j], pg);
+ sg[j].length = PAGE_SIZE;
+ }
+
+ page_offset += sg_per_table;
+ total_sg_needed -= sg_per_table;
+ }
+
+ printk(KERN_INFO "CORE_RD[%u] - Built Ramdisk Device ID: %u space of"
+ " %u pages in %u tables\n", rd_dev->rd_host->rd_host_id,
+ rd_dev->rd_dev_id, rd_dev->rd_page_count,
+ rd_dev->sg_table_count);
+
+ return 0;
+}
+
+static void *rd_allocate_virtdevice(
+ struct se_hba *hba,
+ const char *name,
+ int rd_direct)
+{
+ struct rd_dev *rd_dev;
+ struct rd_host *rd_host = hba->hba_ptr;
+
+ rd_dev = kzalloc(sizeof(struct rd_dev), GFP_KERNEL);
+ if (!(rd_dev)) {
+ printk(KERN_ERR "Unable to allocate memory for struct rd_dev\n");
+ return NULL;
+ }
+
+ rd_dev->rd_host = rd_host;
+ rd_dev->rd_direct = rd_direct;
+
+ return rd_dev;
+}
+
+static void *rd_DIRECT_allocate_virtdevice(struct se_hba *hba, const char *name)
+{
+ return rd_allocate_virtdevice(hba, name, 1);
+}
+
+static void *rd_MEMCPY_allocate_virtdevice(struct se_hba *hba, const char *name)
+{
+ return rd_allocate_virtdevice(hba, name, 0);
+}
+
+/* rd_create_virtdevice():
+ *
+ *
+ */
+static struct se_device *rd_create_virtdevice(
+ struct se_hba *hba,
+ struct se_subsystem_dev *se_dev,
+ void *p,
+ int rd_direct)
+{
+ struct se_device *dev;
+ struct se_dev_limits dev_limits;
+ struct rd_dev *rd_dev = p;
+ struct rd_host *rd_host = hba->hba_ptr;
+ int dev_flags = 0;
+ char prod[16], rev[4];
+
+ memset(&dev_limits, 0, sizeof(struct se_dev_limits));
+
+ if (rd_build_device_space(rd_dev) < 0)
+ goto fail;
+
+ snprintf(prod, 16, "RAMDISK-%s", (rd_dev->rd_direct) ? "DR" : "MCP");
+ snprintf(rev, 4, "%s", (rd_dev->rd_direct) ? RD_DR_VERSION :
+ RD_MCP_VERSION);
+
+ dev_limits.limits.logical_block_size = RD_BLOCKSIZE;
+ dev_limits.limits.max_hw_sectors = RD_MAX_SECTORS;
+ dev_limits.limits.max_sectors = RD_MAX_SECTORS;
+ dev_limits.hw_queue_depth = RD_MAX_DEVICE_QUEUE_DEPTH;
+ dev_limits.queue_depth = RD_DEVICE_QUEUE_DEPTH;
+
+ dev = transport_add_device_to_core_hba(hba,
+ (rd_dev->rd_direct) ? &rd_dr_template :
+ &rd_mcp_template, se_dev, dev_flags, (void *)rd_dev,
+ &dev_limits, prod, rev);
+ if (!(dev))
+ goto fail;
+
+ rd_dev->rd_dev_id = rd_host->rd_host_dev_id_count++;
+ rd_dev->rd_queue_depth = dev->queue_depth;
+
+ printk(KERN_INFO "CORE_RD[%u] - Added TCM %s Ramdisk Device ID: %u of"
+ " %u pages in %u tables, %lu total bytes\n",
+ rd_host->rd_host_id, (!rd_dev->rd_direct) ? "MEMCPY" :
+ "DIRECT", rd_dev->rd_dev_id, rd_dev->rd_page_count,
+ rd_dev->sg_table_count,
+ (unsigned long)(rd_dev->rd_page_count * PAGE_SIZE));
+
+ return dev;
+
+fail:
+ rd_release_device_space(rd_dev);
+ return NULL;
+}
+
+static struct se_device *rd_DIRECT_create_virtdevice(
+ struct se_hba *hba,
+ struct se_subsystem_dev *se_dev,
+ void *p)
+{
+ return rd_create_virtdevice(hba, se_dev, p, 1);
+}
+
+static struct se_device *rd_MEMCPY_create_virtdevice(
+ struct se_hba *hba,
+ struct se_subsystem_dev *se_dev,
+ void *p)
+{
+ return rd_create_virtdevice(hba, se_dev, p, 0);
+}
+
+/* rd_free_device(): (Part of se_subsystem_api_t template)
+ *
+ *
+ */
+static void rd_free_device(void *p)
+{
+ struct rd_dev *rd_dev = p;
+
+ rd_release_device_space(rd_dev);
+ kfree(rd_dev);
+}
+
+static inline struct rd_request *RD_REQ(struct se_task *task)
+{
+ return container_of(task, struct rd_request, rd_task);
+}
+
+static struct se_task *
+rd_alloc_task(struct se_cmd *cmd)
+{
+ struct rd_request *rd_req;
+
+ rd_req = kzalloc(sizeof(struct rd_request), GFP_KERNEL);
+ if (!rd_req) {
+ printk(KERN_ERR "Unable to allocate struct rd_request\n");
+ return NULL;
+ }
+ rd_req->rd_dev = SE_DEV(cmd)->dev_ptr;
+
+ return &rd_req->rd_task;
+}
+
+/* rd_get_sg_table():
+ *
+ *
+ */
+static struct rd_dev_sg_table *rd_get_sg_table(struct rd_dev *rd_dev, u32 page)
+{
+ u32 i;
+ struct rd_dev_sg_table *sg_table;
+
+ for (i = 0; i < rd_dev->sg_table_count; i++) {
+ sg_table = &rd_dev->sg_table_array[i];
+ if ((sg_table->page_start_offset <= page) &&
+ (sg_table->page_end_offset >= page))
+ return sg_table;
+ }
+
+ printk(KERN_ERR "Unable to locate struct rd_dev_sg_table for page: %u\n",
+ page);
+
+ return NULL;
+}
+
+/* rd_MEMCPY_read():
+ *
+ *
+ */
+static int rd_MEMCPY_read(struct rd_request *req)
+{
+ struct se_task *task = &req->rd_task;
+ struct rd_dev *dev = req->rd_dev;
+ struct rd_dev_sg_table *table;
+ struct scatterlist *sg_d, *sg_s;
+ void *dst, *src;
+ u32 i = 0, j = 0, dst_offset = 0, src_offset = 0;
+ u32 length, page_end = 0, table_sg_end;
+ u32 rd_offset = req->rd_offset;
+
+ table = rd_get_sg_table(dev, req->rd_page);
+ if (!(table))
+ return -1;
+
+ table_sg_end = (table->page_end_offset - req->rd_page);
+ sg_d = task->task_sg;
+ sg_s = &table->sg_table[req->rd_page - table->page_start_offset];
+#ifdef DEBUG_RAMDISK_MCP
+ printk(KERN_INFO "RD[%u]: Read LBA: %llu, Size: %u Page: %u, Offset:"
+ " %u\n", dev->rd_dev_id, task->task_lba, req->rd_size,
+ req->rd_page, req->rd_offset);
+#endif
+ src_offset = rd_offset;
+
+ while (req->rd_size) {
+ if ((sg_d[i].length - dst_offset) <
+ (sg_s[j].length - src_offset)) {
+ length = (sg_d[i].length - dst_offset);
+#ifdef DEBUG_RAMDISK_MCP
+ printk(KERN_INFO "Step 1 - sg_d[%d]: %p length: %d"
+ " offset: %u sg_s[%d].length: %u\n", i,
+ &sg_d[i], sg_d[i].length, sg_d[i].offset, j,
+ sg_s[j].length);
+ printk(KERN_INFO "Step 1 - length: %u dst_offset: %u"
+ " src_offset: %u\n", length, dst_offset,
+ src_offset);
+#endif
+ if (length > req->rd_size)
+ length = req->rd_size;
+
+ dst = sg_virt(&sg_d[i++]) + dst_offset;
+ if (!dst)
+ BUG();
+
+ src = sg_virt(&sg_s[j]) + src_offset;
+ if (!src)
+ BUG();
+
+ dst_offset = 0;
+ src_offset = length;
+ page_end = 0;
+ } else {
+ length = (sg_s[j].length - src_offset);
+#ifdef DEBUG_RAMDISK_MCP
+ printk(KERN_INFO "Step 2 - sg_d[%d]: %p length: %d"
+ " offset: %u sg_s[%d].length: %u\n", i,
+ &sg_d[i], sg_d[i].length, sg_d[i].offset,
+ j, sg_s[j].length);
+ printk(KERN_INFO "Step 2 - length: %u dst_offset: %u"
+ " src_offset: %u\n", length, dst_offset,
+ src_offset);
+#endif
+ if (length > req->rd_size)
+ length = req->rd_size;
+
+ dst = sg_virt(&sg_d[i]) + dst_offset;
+ if (!dst)
+ BUG();
+
+ if (sg_d[i].length == length) {
+ i++;
+ dst_offset = 0;
+ } else
+ dst_offset = length;
+
+ src = sg_virt(&sg_s[j++]) + src_offset;
+ if (!src)
+ BUG();
+
+ src_offset = 0;
+ page_end = 1;
+ }
+
+ memcpy(dst, src, length);
+
+#ifdef DEBUG_RAMDISK_MCP
+ printk(KERN_INFO "page: %u, remaining size: %u, length: %u,"
+ " i: %u, j: %u\n", req->rd_page,
+ (req->rd_size - length), length, i, j);
+#endif
+ req->rd_size -= length;
+ if (!(req->rd_size))
+ return 0;
+
+ if (!page_end)
+ continue;
+
+ if (++req->rd_page <= table->page_end_offset) {
+#ifdef DEBUG_RAMDISK_MCP
+ printk(KERN_INFO "page: %u in same page table\n",
+ req->rd_page);
+#endif
+ continue;
+ }
+#ifdef DEBUG_RAMDISK_MCP
+ printk(KERN_INFO "getting new page table for page: %u\n",
+ req->rd_page);
+#endif
+ table = rd_get_sg_table(dev, req->rd_page);
+ if (!(table))
+ return -1;
+
+ sg_s = &table->sg_table[j = 0];
+ }
+
+ return 0;
+}
+
+/* rd_MEMCPY_write():
+ *
+ *
+ */
+static int rd_MEMCPY_write(struct rd_request *req)
+{
+ struct se_task *task = &req->rd_task;
+ struct rd_dev *dev = req->rd_dev;
+ struct rd_dev_sg_table *table;
+ struct scatterlist *sg_d, *sg_s;
+ void *dst, *src;
+ u32 i = 0, j = 0, dst_offset = 0, src_offset = 0;
+ u32 length, page_end = 0, table_sg_end;
+ u32 rd_offset = req->rd_offset;
+
+ table = rd_get_sg_table(dev, req->rd_page);
+ if (!(table))
+ return -1;
+
+ table_sg_end = (table->page_end_offset - req->rd_page);
+ sg_d = &table->sg_table[req->rd_page - table->page_start_offset];
+ sg_s = task->task_sg;
+#ifdef DEBUG_RAMDISK_MCP
+ printk(KERN_INFO "RD[%d] Write LBA: %llu, Size: %u, Page: %u,"
+ " Offset: %u\n", dev->rd_dev_id, task->task_lba, req->rd_size,
+ req->rd_page, req->rd_offset);
+#endif
+ dst_offset = rd_offset;
+
+ while (req->rd_size) {
+ if ((sg_s[i].length - src_offset) <
+ (sg_d[j].length - dst_offset)) {
+ length = (sg_s[i].length - src_offset);
+#ifdef DEBUG_RAMDISK_MCP
+ printk(KERN_INFO "Step 1 - sg_s[%d]: %p length: %d"
+ " offset: %d sg_d[%d].length: %u\n", i,
+ &sg_s[i], sg_s[i].length, sg_s[i].offset,
+ j, sg_d[j].length);
+ printk(KERN_INFO "Step 1 - length: %u src_offset: %u"
+ " dst_offset: %u\n", length, src_offset,
+ dst_offset);
+#endif
+ if (length > req->rd_size)
+ length = req->rd_size;
+
+ src = sg_virt(&sg_s[i++]) + src_offset;
+ if (!src)
+ BUG();
+
+ dst = sg_virt(&sg_d[j]) + dst_offset;
+ if (!dst)
+ BUG();
+
+ src_offset = 0;
+ dst_offset = length;
+ page_end = 0;
+ } else {
+ length = (sg_d[j].length - dst_offset);
+#ifdef DEBUG_RAMDISK_MCP
+ printk(KERN_INFO "Step 2 - sg_s[%d]: %p length: %d"
+ " offset: %d sg_d[%d].length: %u\n", i,
+ &sg_s[i], sg_s[i].length, sg_s[i].offset,
+ j, sg_d[j].length);
+ printk(KERN_INFO "Step 2 - length: %u src_offset: %u"
+ " dst_offset: %u\n", length, src_offset,
+ dst_offset);
+#endif
+ if (length > req->rd_size)
+ length = req->rd_size;
+
+ src = sg_virt(&sg_s[i]) + src_offset;
+ if (!src)
+ BUG();
+
+ if (sg_s[i].length == length) {
+ i++;
+ src_offset = 0;
+ } else
+ src_offset = length;
+
+ dst = sg_virt(&sg_d[j++]) + dst_offset;
+ if (!dst)
+ BUG();
+
+ dst_offset = 0;
+ page_end = 1;
+ }
+
+ memcpy(dst, src, length);
+
+#ifdef DEBUG_RAMDISK_MCP
+ printk(KERN_INFO "page: %u, remaining size: %u, length: %u,"
+ " i: %u, j: %u\n", req->rd_page,
+ (req->rd_size - length), length, i, j);
+#endif
+ req->rd_size -= length;
+ if (!(req->rd_size))
+ return 0;
+
+ if (!page_end)
+ continue;
+
+ if (++req->rd_page <= table->page_end_offset) {
+#ifdef DEBUG_RAMDISK_MCP
+ printk(KERN_INFO "page: %u in same page table\n",
+ req->rd_page);
+#endif
+ continue;
+ }
+#ifdef DEBUG_RAMDISK_MCP
+ printk(KERN_INFO "getting new page table for page: %u\n",
+ req->rd_page);
+#endif
+ table = rd_get_sg_table(dev, req->rd_page);
+ if (!(table))
+ return -1;
+
+ sg_d = &table->sg_table[j = 0];
+ }
+
+ return 0;
+}
+
+/* rd_MEMCPY_do_task(): (Part of se_subsystem_api_t template)
+ *
+ *
+ */
+static int rd_MEMCPY_do_task(struct se_task *task)
+{
+ struct se_device *dev = task->se_dev;
+ struct rd_request *req = RD_REQ(task);
+ unsigned long long lba;
+ int ret;
+
+ req->rd_page = (task->task_lba * DEV_ATTRIB(dev)->block_size) / PAGE_SIZE;
+ lba = task->task_lba;
+ req->rd_offset = (do_div(lba,
+ (PAGE_SIZE / DEV_ATTRIB(dev)->block_size))) *
+ DEV_ATTRIB(dev)->block_size;
+ req->rd_size = task->task_size;
+
+ if (task->task_data_direction == DMA_FROM_DEVICE)
+ ret = rd_MEMCPY_read(req);
+ else
+ ret = rd_MEMCPY_write(req);
+
+ if (ret != 0)
+ return ret;
+
+ task->task_scsi_status = GOOD;
+ transport_complete_task(task, 1);
+
+ return PYX_TRANSPORT_SENT_TO_TRANSPORT;
+}
+
+/* rd_DIRECT_with_offset():
+ *
+ *
+ */
+static int rd_DIRECT_with_offset(
+ struct se_task *task,
+ struct list_head *se_mem_list,
+ u32 *se_mem_cnt,
+ u32 *task_offset)
+{
+ struct rd_request *req = RD_REQ(task);
+ struct rd_dev *dev = req->rd_dev;
+ struct rd_dev_sg_table *table;
+ struct se_mem *se_mem;
+ struct scatterlist *sg_s;
+ u32 j = 0, set_offset = 1;
+ u32 get_next_table = 0, offset_length, table_sg_end;
+
+ table = rd_get_sg_table(dev, req->rd_page);
+ if (!(table))
+ return -1;
+
+ table_sg_end = (table->page_end_offset - req->rd_page);
+ sg_s = &table->sg_table[req->rd_page - table->page_start_offset];
+#ifdef DEBUG_RAMDISK_DR
+ printk(KERN_INFO "%s DIRECT LBA: %llu, Size: %u Page: %u, Offset: %u\n",
+ (task->task_data_direction == DMA_TO_DEVICE) ?
+ "Write" : "Read",
+ task->task_lba, req->rd_size, req->rd_page, req->rd_offset);
+#endif
+ while (req->rd_size) {
+ se_mem = kmem_cache_zalloc(se_mem_cache, GFP_KERNEL);
+ if (!(se_mem)) {
+ printk(KERN_ERR "Unable to allocate struct se_mem\n");
+ return -1;
+ }
+ INIT_LIST_HEAD(&se_mem->se_list);
+
+ if (set_offset) {
+ offset_length = sg_s[j].length - req->rd_offset;
+ if (offset_length > req->rd_size)
+ offset_length = req->rd_size;
+
+ se_mem->se_page = sg_page(&sg_s[j++]);
+ se_mem->se_off = req->rd_offset;
+ se_mem->se_len = offset_length;
+
+ set_offset = 0;
+ get_next_table = (j > table_sg_end);
+ goto check_eot;
+ }
+
+ offset_length = (req->rd_size < req->rd_offset) ?
+ req->rd_size : req->rd_offset;
+
+ se_mem->se_page = sg_page(&sg_s[j]);
+ se_mem->se_len = offset_length;
+
+ set_offset = 1;
+
+check_eot:
+#ifdef DEBUG_RAMDISK_DR
+ printk(KERN_INFO "page: %u, size: %u, offset_length: %u, j: %u"
+ " se_mem: %p, se_page: %p se_off: %u se_len: %u\n",
+ req->rd_page, req->rd_size, offset_length, j, se_mem,
+ se_mem->se_page, se_mem->se_off, se_mem->se_len);
+#endif
+ list_add_tail(&se_mem->se_list, se_mem_list);
+ (*se_mem_cnt)++;
+
+ req->rd_size -= offset_length;
+ if (!(req->rd_size))
+ goto out;
+
+ if (!set_offset && !get_next_table)
+ continue;
+
+ if (++req->rd_page <= table->page_end_offset) {
+#ifdef DEBUG_RAMDISK_DR
+ printk(KERN_INFO "page: %u in same page table\n",
+ req->rd_page);
+#endif
+ continue;
+ }
+#ifdef DEBUG_RAMDISK_DR
+ printk(KERN_INFO "getting new page table for page: %u\n",
+ req->rd_page);
+#endif
+ table = rd_get_sg_table(dev, req->rd_page);
+ if (!(table))
+ return -1;
+
+ sg_s = &table->sg_table[j = 0];
+ }
+
+out:
+ T_TASK(task->task_se_cmd)->t_tasks_se_num += *se_mem_cnt;
+#ifdef DEBUG_RAMDISK_DR
+ printk(KERN_INFO "RD_DR - Allocated %u struct se_mem segments for task\n",
+ *se_mem_cnt);
+#endif
+ return 0;
+}
+
+/* rd_DIRECT_without_offset():
+ *
+ *
+ */
+static int rd_DIRECT_without_offset(
+ struct se_task *task,
+ struct list_head *se_mem_list,
+ u32 *se_mem_cnt,
+ u32 *task_offset)
+{
+ struct rd_request *req = RD_REQ(task);
+ struct rd_dev *dev = req->rd_dev;
+ struct rd_dev_sg_table *table;
+ struct se_mem *se_mem;
+ struct scatterlist *sg_s;
+ u32 length, j = 0;
+
+ table = rd_get_sg_table(dev, req->rd_page);
+ if (!(table))
+ return -1;
+
+ sg_s = &table->sg_table[req->rd_page - table->page_start_offset];
+#ifdef DEBUG_RAMDISK_DR
+ printk(KERN_INFO "%s DIRECT LBA: %llu, Size: %u, Page: %u\n",
+ (task->task_data_direction == DMA_TO_DEVICE) ?
+ "Write" : "Read",
+ task->task_lba, req->rd_size, req->rd_page);
+#endif
+ while (req->rd_size) {
+ se_mem = kmem_cache_zalloc(se_mem_cache, GFP_KERNEL);
+ if (!(se_mem)) {
+ printk(KERN_ERR "Unable to allocate struct se_mem\n");
+ return -1;
+ }
+ INIT_LIST_HEAD(&se_mem->se_list);
+
+ length = (req->rd_size < sg_s[j].length) ?
+ req->rd_size : sg_s[j].length;
+
+ se_mem->se_page = sg_page(&sg_s[j++]);
+ se_mem->se_len = length;
+
+#ifdef DEBUG_RAMDISK_DR
+ printk(KERN_INFO "page: %u, size: %u, j: %u se_mem: %p,"
+ " se_page: %p se_off: %u se_len: %u\n", req->rd_page,
+ req->rd_size, j, se_mem, se_mem->se_page,
+ se_mem->se_off, se_mem->se_len);
+#endif
+ list_add_tail(&se_mem->se_list, se_mem_list);
+ (*se_mem_cnt)++;
+
+ req->rd_size -= length;
+ if (!(req->rd_size))
+ goto out;
+
+ if (++req->rd_page <= table->page_end_offset) {
+#ifdef DEBUG_RAMDISK_DR
+ printk("page: %u in same page table\n",
+ req->rd_page);
+#endif
+ continue;
+ }
+#ifdef DEBUG_RAMDISK_DR
+ printk(KERN_INFO "getting new page table for page: %u\n",
+ req->rd_page);
+#endif
+ table = rd_get_sg_table(dev, req->rd_page);
+ if (!(table))
+ return -1;
+
+ sg_s = &table->sg_table[j = 0];
+ }
+
+out:
+ T_TASK(task->task_se_cmd)->t_tasks_se_num += *se_mem_cnt;
+#ifdef DEBUG_RAMDISK_DR
+ printk(KERN_INFO "RD_DR - Allocated %u struct se_mem segments for task\n",
+ *se_mem_cnt);
+#endif
+ return 0;
+}
+
+/* rd_DIRECT_do_se_mem_map():
+ *
+ *
+ */
+static int rd_DIRECT_do_se_mem_map(
+ struct se_task *task,
+ struct list_head *se_mem_list,
+ void *in_mem,
+ struct se_mem *in_se_mem,
+ struct se_mem **out_se_mem,
+ u32 *se_mem_cnt,
+ u32 *task_offset_in)
+{
+ struct se_cmd *cmd = task->task_se_cmd;
+ struct rd_request *req = RD_REQ(task);
+ u32 task_offset = *task_offset_in;
+ unsigned long long lba;
+ int ret;
+
+ req->rd_page = ((task->task_lba * DEV_ATTRIB(task->se_dev)->block_size) /
+ PAGE_SIZE);
+ lba = task->task_lba;
+ req->rd_offset = (do_div(lba,
+ (PAGE_SIZE / DEV_ATTRIB(task->se_dev)->block_size))) *
+ DEV_ATTRIB(task->se_dev)->block_size;
+ req->rd_size = task->task_size;
+
+ if (req->rd_offset)
+ ret = rd_DIRECT_with_offset(task, se_mem_list, se_mem_cnt,
+ task_offset_in);
+ else
+ ret = rd_DIRECT_without_offset(task, se_mem_list, se_mem_cnt,
+ task_offset_in);
+
+ if (ret < 0)
+ return ret;
+
+ if (CMD_TFO(cmd)->task_sg_chaining == 0)
+ return 0;
+ /*
+ * Currently prevent writers from multiple HW fabrics doing
+ * pci_map_sg() to RD_DR's internal scatterlist memory.
+ */
+ if (cmd->data_direction == DMA_TO_DEVICE) {
+ printk(KERN_ERR "DMA_TO_DEVICE not supported for"
+ " RAMDISK_DR with task_sg_chaining=1\n");
+ return -1;
+ }
+ /*
+ * Special case for if task_sg_chaining is enabled, then
+ * we setup struct se_task->task_sg[], as it will be used by
+ * transport_do_task_sg_chain() for creating chainged SGLs
+ * across multiple struct se_task->task_sg[].
+ */
+ if (!(transport_calc_sg_num(task,
+ list_entry(T_TASK(cmd)->t_mem_list->next,
+ struct se_mem, se_list),
+ task_offset)))
+ return -1;
+
+ return transport_map_mem_to_sg(task, se_mem_list, task->task_sg,
+ list_entry(T_TASK(cmd)->t_mem_list->next,
+ struct se_mem, se_list),
+ out_se_mem, se_mem_cnt, task_offset_in);
+}
+
+/* rd_DIRECT_do_task(): (Part of se_subsystem_api_t template)
+ *
+ *
+ */
+static int rd_DIRECT_do_task(struct se_task *task)
+{
+ /*
+ * At this point the locally allocated RD tables have been mapped
+ * to struct se_mem elements in rd_DIRECT_do_se_mem_map().
+ */
+ task->task_scsi_status = GOOD;
+ transport_complete_task(task, 1);
+
+ return PYX_TRANSPORT_SENT_TO_TRANSPORT;
+}
+
+/* rd_free_task(): (Part of se_subsystem_api_t template)
+ *
+ *
+ */
+static void rd_free_task(struct se_task *task)
+{
+ kfree(RD_REQ(task));
+}
+
+enum {
+ Opt_rd_pages, Opt_err
+};
+
+static match_table_t tokens = {
+ {Opt_rd_pages, "rd_pages=%d"},
+ {Opt_err, NULL}
+};
+
+static ssize_t rd_set_configfs_dev_params(
+ struct se_hba *hba,
+ struct se_subsystem_dev *se_dev,
+ const char *page,
+ ssize_t count)
+{
+ struct rd_dev *rd_dev = se_dev->se_dev_su_ptr;
+ char *orig, *ptr, *opts;
+ substring_t args[MAX_OPT_ARGS];
+ int ret = 0, arg, token;
+
+ opts = kstrdup(page, GFP_KERNEL);
+ if (!opts)
+ return -ENOMEM;
+
+ orig = opts;
+
+ while ((ptr = strsep(&opts, ",")) != NULL) {
+ if (!*ptr)
+ continue;
+
+ token = match_token(ptr, tokens, args);
+ switch (token) {
+ case Opt_rd_pages:
+ match_int(args, &arg);
+ rd_dev->rd_page_count = arg;
+ printk(KERN_INFO "RAMDISK: Referencing Page"
+ " Count: %u\n", rd_dev->rd_page_count);
+ rd_dev->rd_flags |= RDF_HAS_PAGE_COUNT;
+ break;
+ default:
+ break;
+ }
+ }
+
+ kfree(orig);
+ return (!ret) ? count : ret;
+}
+
+static ssize_t rd_check_configfs_dev_params(struct se_hba *hba, struct se_subsystem_dev *se_dev)
+{
+ struct rd_dev *rd_dev = se_dev->se_dev_su_ptr;
+
+ if (!(rd_dev->rd_flags & RDF_HAS_PAGE_COUNT)) {
+ printk(KERN_INFO "Missing rd_pages= parameter\n");
+ return -1;
+ }
+
+ return 0;
+}
+
+static ssize_t rd_show_configfs_dev_params(
+ struct se_hba *hba,
+ struct se_subsystem_dev *se_dev,
+ char *b)
+{
+ struct rd_dev *rd_dev = se_dev->se_dev_su_ptr;
+ ssize_t bl = sprintf(b, "TCM RamDisk ID: %u RamDisk Makeup: %s\n",
+ rd_dev->rd_dev_id, (rd_dev->rd_direct) ?
+ "rd_direct" : "rd_mcp");
+ bl += sprintf(b + bl, " PAGES/PAGE_SIZE: %u*%lu"
+ " SG_table_count: %u\n", rd_dev->rd_page_count,
+ PAGE_SIZE, rd_dev->sg_table_count);
+ return bl;
+}
+
+/* rd_get_cdb(): (Part of se_subsystem_api_t template)
+ *
+ *
+ */
+static unsigned char *rd_get_cdb(struct se_task *task)
+{
+ struct rd_request *req = RD_REQ(task);
+
+ return req->rd_scsi_cdb;
+}
+
+static u32 rd_get_device_rev(struct se_device *dev)
+{
+ return SCSI_SPC_2; /* Returns SPC-3 in Initiator Data */
+}
+
+static u32 rd_get_device_type(struct se_device *dev)
+{
+ return TYPE_DISK;
+}
+
+static sector_t rd_get_blocks(struct se_device *dev)
+{
+ struct rd_dev *rd_dev = dev->dev_ptr;
+ unsigned long long blocks_long = ((rd_dev->rd_page_count * PAGE_SIZE) /
+ DEV_ATTRIB(dev)->block_size) - 1;
+
+ return blocks_long;
+}
+
+static struct se_subsystem_api rd_dr_template = {
+ .name = "rd_dr",
+ .transport_type = TRANSPORT_PLUGIN_VHBA_VDEV,
+ .attach_hba = rd_attach_hba,
+ .detach_hba = rd_detach_hba,
+ .allocate_virtdevice = rd_DIRECT_allocate_virtdevice,
+ .create_virtdevice = rd_DIRECT_create_virtdevice,
+ .free_device = rd_free_device,
+ .alloc_task = rd_alloc_task,
+ .do_task = rd_DIRECT_do_task,
+ .free_task = rd_free_task,
+ .check_configfs_dev_params = rd_check_configfs_dev_params,
+ .set_configfs_dev_params = rd_set_configfs_dev_params,
+ .show_configfs_dev_params = rd_show_configfs_dev_params,
+ .get_cdb = rd_get_cdb,
+ .get_device_rev = rd_get_device_rev,
+ .get_device_type = rd_get_device_type,
+ .get_blocks = rd_get_blocks,
+ .do_se_mem_map = rd_DIRECT_do_se_mem_map,
+};
+
+static struct se_subsystem_api rd_mcp_template = {
+ .name = "rd_mcp",
+ .transport_type = TRANSPORT_PLUGIN_VHBA_VDEV,
+ .attach_hba = rd_attach_hba,
+ .detach_hba = rd_detach_hba,
+ .allocate_virtdevice = rd_MEMCPY_allocate_virtdevice,
+ .create_virtdevice = rd_MEMCPY_create_virtdevice,
+ .free_device = rd_free_device,
+ .alloc_task = rd_alloc_task,
+ .do_task = rd_MEMCPY_do_task,
+ .free_task = rd_free_task,
+ .check_configfs_dev_params = rd_check_configfs_dev_params,
+ .set_configfs_dev_params = rd_set_configfs_dev_params,
+ .show_configfs_dev_params = rd_show_configfs_dev_params,
+ .get_cdb = rd_get_cdb,
+ .get_device_rev = rd_get_device_rev,
+ .get_device_type = rd_get_device_type,
+ .get_blocks = rd_get_blocks,
+};
+
+int __init rd_module_init(void)
+{
+ int ret;
+
+ ret = transport_subsystem_register(&rd_dr_template);
+ if (ret < 0)
+ return ret;
+
+ ret = transport_subsystem_register(&rd_mcp_template);
+ if (ret < 0) {
+ transport_subsystem_release(&rd_dr_template);
+ return ret;
+ }
+
+ return 0;
+}
+
+void rd_module_exit(void)
+{
+ transport_subsystem_release(&rd_dr_template);
+ transport_subsystem_release(&rd_mcp_template);
+}
diff --git a/drivers/target/target_core_rd.h b/drivers/target/target_core_rd.h
new file mode 100644
index 0000000..13badfb
--- /dev/null
+++ b/drivers/target/target_core_rd.h
@@ -0,0 +1,73 @@
+#ifndef TARGET_CORE_RD_H
+#define TARGET_CORE_RD_H
+
+#define RD_HBA_VERSION "v4.0"
+#define RD_DR_VERSION "4.0"
+#define RD_MCP_VERSION "4.0"
+
+/* Largest piece of memory kmalloc can allocate */
+#define RD_MAX_ALLOCATION_SIZE 65536
+/* Maximum queuedepth for the Ramdisk HBA */
+#define RD_HBA_QUEUE_DEPTH 256
+#define RD_DEVICE_QUEUE_DEPTH 32
+#define RD_MAX_DEVICE_QUEUE_DEPTH 128
+#define RD_BLOCKSIZE 512
+#define RD_MAX_SECTORS 1024
+
+extern struct kmem_cache *se_mem_cache;
+
+/* Used in target_core_init_configfs() for virtual LUN 0 access */
+int __init rd_module_init(void);
+void rd_module_exit(void);
+
+#define RRF_EMULATE_CDB 0x01
+#define RRF_GOT_LBA 0x02
+
+struct rd_request {
+ struct se_task rd_task;
+
+ /* SCSI CDB from iSCSI Command PDU */
+ unsigned char rd_scsi_cdb[TCM_MAX_COMMAND_SIZE];
+ /* Offset from start of page */
+ u32 rd_offset;
+ /* Starting page in Ramdisk for request */
+ u32 rd_page;
+ /* Total number of pages needed for request */
+ u32 rd_page_count;
+ /* Scatterlist count */
+ u32 rd_size;
+ /* Ramdisk device */
+ struct rd_dev *rd_dev;
+} ____cacheline_aligned;
+
+struct rd_dev_sg_table {
+ u32 page_start_offset;
+ u32 page_end_offset;
+ u32 rd_sg_count;
+ struct scatterlist *sg_table;
+} ____cacheline_aligned;
+
+#define RDF_HAS_PAGE_COUNT 0x01
+
+struct rd_dev {
+ int rd_direct;
+ u32 rd_flags;
+ /* Unique Ramdisk Device ID in Ramdisk HBA */
+ u32 rd_dev_id;
+ /* Total page count for ramdisk device */
+ u32 rd_page_count;
+ /* Number of SG tables in sg_table_array */
+ u32 sg_table_count;
+ u32 rd_queue_depth;
+ /* Array of rd_dev_sg_table_t containing scatterlists */
+ struct rd_dev_sg_table *sg_table_array;
+ /* Ramdisk HBA device is connected to */
+ struct rd_host *rd_host;
+} ____cacheline_aligned;
+
+struct rd_host {
+ u32 rd_host_dev_id_count;
+ u32 rd_host_id; /* Unique Ramdisk Host ID */
+} ____cacheline_aligned;
+
+#endif /* TARGET_CORE_RD_H */
--
1.7.3.4
^ permalink raw reply related [flat|nested] 22+ messages in thread* [PATCH v2 02q/03] target: Add generic fabric independent ConfigFS infrastructure
2010-12-17 21:11 [PATCH v2 00/03] target: Initial merge of v4.0.0-rc6 for .38 Nicholas A. Bellinger
` (16 preceding siblings ...)
2010-12-17 21:11 ` [PATCH v2 02p/03] target: Add RAMDISK_DR and RAMDISK_MCP subsystem plugins Nicholas A. Bellinger
@ 2010-12-17 21:11 ` Nicholas A. Bellinger
2010-12-17 21:11 ` [PATCH v2 02r/03] target: Add generic ProtoID and TransportID fabric handlers for SAS, FC, and iSCSI Nicholas A. Bellinger
` (2 subsequent siblings)
20 siblings, 0 replies; 22+ messages in thread
From: Nicholas A. Bellinger @ 2010-12-17 21:11 UTC (permalink / raw)
To: linux-scsi, James Bottomley; +Cc: Nicholas Bellinger
From: Nicholas Bellinger <nab@linux-iscsi.org>
This patch adds the v4 fabric independent configfs code that allows modules
to use a generic set of struct config_item_types and struct config_groups hanging
off fabric dependent structures, without having to explictly define a configfs layout
of /sys/kernel/config/target/$FABRIC themselves. This allows a generic layout to be
used with fabric dependent attributes using struct config_item_type context specific
macros in include/target/target_core_fabric_configfs.h.
Signed-off-by: Nicholas A. Bellinger <nab@linux-iscsi.org>
---
drivers/target/target_core_fabric_configfs.c | 1001 ++++++++++++++++++++++++++
include/target/target_core_fabric_configfs.h | 106 +++
2 files changed, 1107 insertions(+), 0 deletions(-)
create mode 100644 drivers/target/target_core_fabric_configfs.c
create mode 100644 include/target/target_core_fabric_configfs.h
diff --git a/drivers/target/target_core_fabric_configfs.c b/drivers/target/target_core_fabric_configfs.c
new file mode 100644
index 0000000..5f0e497
--- /dev/null
+++ b/drivers/target/target_core_fabric_configfs.c
@@ -0,0 +1,1001 @@
+/*******************************************************************************
+* Filename: target_core_fabric_configfs.c
+ *
+ * This file contains generic fabric module configfs infrastructure for
+ * TCM v4.x code
+ *
+ * Copyright (c) 2010 Rising Tide Systems
+ * Copyright (c) 2010 Linux-iSCSI.org
+ *
+ * Copyright (c) 2010 Nicholas A. Bellinger <nab@linux-iscsi.org>
+*
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ ****************************************************************************/
+
+#include <linux/module.h>
+#include <linux/moduleparam.h>
+#include <linux/version.h>
+#include <generated/utsrelease.h>
+#include <linux/utsname.h>
+#include <linux/init.h>
+#include <linux/fs.h>
+#include <linux/namei.h>
+#include <linux/slab.h>
+#include <linux/types.h>
+#include <linux/delay.h>
+#include <linux/unistd.h>
+#include <linux/string.h>
+#include <linux/syscalls.h>
+#include <linux/configfs.h>
+
+#include <target/target_core_base.h>
+#include <target/target_core_device.h>
+#include <target/target_core_tpg.h>
+#include <target/target_core_transport.h>
+#include <target/target_core_fabric_ops.h>
+#include <target/target_core_fabric_configfs.h>
+#include <target/target_core_configfs.h>
+#include <target/configfs_macros.h>
+
+#include "target_core_alua.h"
+#include "target_core_hba.h"
+#include "target_core_pr.h"
+
+#define TF_CIT_SETUP(_name, _item_ops, _group_ops, _attrs) \
+static void target_fabric_setup_##_name##_cit(struct target_fabric_configfs *tf) \
+{ \
+ struct target_fabric_configfs_template *tfc = &tf->tf_cit_tmpl; \
+ struct config_item_type *cit = &tfc->tfc_##_name##_cit; \
+ \
+ cit->ct_item_ops = _item_ops; \
+ cit->ct_group_ops = _group_ops; \
+ cit->ct_attrs = _attrs; \
+ cit->ct_owner = tf->tf_module; \
+ printk("Setup generic %s\n", __stringify(_name)); \
+}
+
+/* Start of tfc_tpg_mappedlun_cit */
+
+static int target_fabric_mappedlun_link(
+ struct config_item *lun_acl_ci,
+ struct config_item *lun_ci)
+{
+ struct se_dev_entry *deve;
+ struct se_lun *lun = container_of(to_config_group(lun_ci),
+ struct se_lun, lun_group);
+ struct se_lun_acl *lacl = container_of(to_config_group(lun_acl_ci),
+ struct se_lun_acl, se_lun_group);
+ struct se_portal_group *se_tpg;
+ struct config_item *nacl_ci, *tpg_ci, *tpg_ci_s, *wwn_ci, *wwn_ci_s;
+ int ret = 0, lun_access;
+ /*
+ * Ensure that the source port exists
+ */
+ if (!(lun->lun_sep) || !(lun->lun_sep->sep_tpg)) {
+ printk(KERN_ERR "Source se_lun->lun_sep or lun->lun_sep->sep"
+ "_tpg does not exist\n");
+ return -EINVAL;
+ }
+ se_tpg = lun->lun_sep->sep_tpg;
+
+ nacl_ci = &lun_acl_ci->ci_parent->ci_group->cg_item;
+ tpg_ci = &nacl_ci->ci_group->cg_item;
+ wwn_ci = &tpg_ci->ci_group->cg_item;
+ tpg_ci_s = &lun_ci->ci_parent->ci_group->cg_item;
+ wwn_ci_s = &tpg_ci_s->ci_group->cg_item;
+ /*
+ * Make sure the SymLink is going to the same $FABRIC/$WWN/tpgt_$TPGT
+ */
+ if (strcmp(config_item_name(wwn_ci), config_item_name(wwn_ci_s))) {
+ printk(KERN_ERR "Illegal Initiator ACL SymLink outside of %s\n",
+ config_item_name(wwn_ci));
+ return -EINVAL;
+ }
+ if (strcmp(config_item_name(tpg_ci), config_item_name(tpg_ci_s))) {
+ printk(KERN_ERR "Illegal Initiator ACL Symlink outside of %s"
+ " TPGT: %s\n", config_item_name(wwn_ci),
+ config_item_name(tpg_ci));
+ return -EINVAL;
+ }
+ /*
+ * If this struct se_node_acl was dynamically generated with
+ * tpg_1/attrib/generate_node_acls=1, use the existing deve->lun_flags,
+ * which be will write protected (READ-ONLY) when
+ * tpg_1/attrib/demo_mode_write_protect=1
+ */
+ spin_lock_irq(&lacl->se_lun_nacl->device_list_lock);
+ deve = &lacl->se_lun_nacl->device_list[lacl->mapped_lun];
+ if (deve->lun_flags & TRANSPORT_LUNFLAGS_INITIATOR_ACCESS)
+ lun_access = deve->lun_flags;
+ else
+ lun_access =
+ (TPG_TFO(se_tpg)->tpg_check_prod_mode_write_protect(
+ se_tpg)) ? TRANSPORT_LUNFLAGS_READ_ONLY :
+ TRANSPORT_LUNFLAGS_READ_WRITE;
+ spin_unlock_irq(&lacl->se_lun_nacl->device_list_lock);
+ /*
+ * Determine the actual mapped LUN value user wants..
+ *
+ * This value is what the SCSI Initiator actually sees the
+ * iscsi/$IQN/$TPGT/lun/lun_* as on their SCSI Initiator Ports.
+ */
+ ret = core_dev_add_initiator_node_lun_acl(se_tpg, lacl,
+ lun->unpacked_lun, lun_access);
+
+ return (ret < 0) ? -EINVAL : 0;
+}
+
+static int target_fabric_mappedlun_unlink(
+ struct config_item *lun_acl_ci,
+ struct config_item *lun_ci)
+{
+ struct se_lun *lun;
+ struct se_lun_acl *lacl = container_of(to_config_group(lun_acl_ci),
+ struct se_lun_acl, se_lun_group);
+ struct se_node_acl *nacl = lacl->se_lun_nacl;
+ struct se_dev_entry *deve = &nacl->device_list[lacl->mapped_lun];
+ struct se_portal_group *se_tpg;
+ /*
+ * Determine if the underlying MappedLUN has already been released..
+ */
+ if (!(deve->se_lun))
+ return 0;
+
+ lun = container_of(to_config_group(lun_ci), struct se_lun, lun_group);
+ se_tpg = lun->lun_sep->sep_tpg;
+
+ core_dev_del_initiator_node_lun_acl(se_tpg, lun, lacl);
+ return 0;
+}
+
+CONFIGFS_EATTR_STRUCT(target_fabric_mappedlun, se_lun_acl);
+#define TCM_MAPPEDLUN_ATTR(_name, _mode) \
+static struct target_fabric_mappedlun_attribute target_fabric_mappedlun_##_name = \
+ __CONFIGFS_EATTR(_name, _mode, \
+ target_fabric_mappedlun_show_##_name, \
+ target_fabric_mappedlun_store_##_name);
+
+static ssize_t target_fabric_mappedlun_show_write_protect(
+ struct se_lun_acl *lacl,
+ char *page)
+{
+ struct se_node_acl *se_nacl = lacl->se_lun_nacl;
+ struct se_dev_entry *deve;
+ ssize_t len;
+
+ spin_lock_irq(&se_nacl->device_list_lock);
+ deve = &se_nacl->device_list[lacl->mapped_lun];
+ len = sprintf(page, "%d\n",
+ (deve->lun_flags & TRANSPORT_LUNFLAGS_READ_ONLY) ?
+ 1 : 0);
+ spin_unlock_irq(&se_nacl->device_list_lock);
+
+ return len;
+}
+
+static ssize_t target_fabric_mappedlun_store_write_protect(
+ struct se_lun_acl *lacl,
+ const char *page,
+ size_t count)
+{
+ struct se_node_acl *se_nacl = lacl->se_lun_nacl;
+ struct se_portal_group *se_tpg = se_nacl->se_tpg;
+ char *endptr;
+ u32 op;
+
+ op = simple_strtoul(page, &endptr, 0);
+ if ((op != 1) && (op != 0)) {
+ printk(KERN_ERR "Illegal value for access: %u\n", op);
+ return -EINVAL;
+ }
+ core_update_device_list_access(lacl->mapped_lun, (op) ?
+ TRANSPORT_LUNFLAGS_READ_ONLY :
+ TRANSPORT_LUNFLAGS_READ_WRITE,
+ lacl->se_lun_nacl);
+
+ printk(KERN_INFO "%s_ConfigFS: Changed Initiator ACL: %s"
+ " Mapped LUN: %u Write Protect bit to %s\n",
+ TPG_TFO(se_tpg)->get_fabric_name(),
+ lacl->initiatorname, lacl->mapped_lun, (op) ? "ON" : "OFF");
+
+ return count;
+
+}
+
+TCM_MAPPEDLUN_ATTR(write_protect, S_IRUGO | S_IWUSR);
+
+CONFIGFS_EATTR_OPS(target_fabric_mappedlun, se_lun_acl, se_lun_group);
+
+static struct configfs_attribute *target_fabric_mappedlun_attrs[] = {
+ &target_fabric_mappedlun_write_protect.attr,
+ NULL,
+};
+
+static struct configfs_item_operations target_fabric_mappedlun_item_ops = {
+ .show_attribute = target_fabric_mappedlun_attr_show,
+ .store_attribute = target_fabric_mappedlun_attr_store,
+ .allow_link = target_fabric_mappedlun_link,
+ .drop_link = target_fabric_mappedlun_unlink,
+};
+
+TF_CIT_SETUP(tpg_mappedlun, &target_fabric_mappedlun_item_ops, NULL,
+ target_fabric_mappedlun_attrs);
+
+/* End of tfc_tpg_mappedlun_cit */
+
+/* Start of tfc_tpg_nacl_attrib_cit */
+
+CONFIGFS_EATTR_OPS(target_fabric_nacl_attrib, se_node_acl, acl_attrib_group);
+
+static struct configfs_item_operations target_fabric_nacl_attrib_item_ops = {
+ .show_attribute = target_fabric_nacl_attrib_attr_show,
+ .store_attribute = target_fabric_nacl_attrib_attr_store,
+};
+
+TF_CIT_SETUP(tpg_nacl_attrib, &target_fabric_nacl_attrib_item_ops, NULL, NULL);
+
+/* End of tfc_tpg_nacl_attrib_cit */
+
+/* Start of tfc_tpg_nacl_auth_cit */
+
+CONFIGFS_EATTR_OPS(target_fabric_nacl_auth, se_node_acl, acl_auth_group);
+
+static struct configfs_item_operations target_fabric_nacl_auth_item_ops = {
+ .show_attribute = target_fabric_nacl_auth_attr_show,
+ .store_attribute = target_fabric_nacl_auth_attr_store,
+};
+
+TF_CIT_SETUP(tpg_nacl_auth, &target_fabric_nacl_auth_item_ops, NULL, NULL);
+
+/* End of tfc_tpg_nacl_auth_cit */
+
+/* Start of tfc_tpg_nacl_param_cit */
+
+CONFIGFS_EATTR_OPS(target_fabric_nacl_param, se_node_acl, acl_param_group);
+
+static struct configfs_item_operations target_fabric_nacl_param_item_ops = {
+ .show_attribute = target_fabric_nacl_param_attr_show,
+ .store_attribute = target_fabric_nacl_param_attr_store,
+};
+
+TF_CIT_SETUP(tpg_nacl_param, &target_fabric_nacl_param_item_ops, NULL, NULL);
+
+/* End of tfc_tpg_nacl_param_cit */
+
+/* Start of tfc_tpg_nacl_base_cit */
+
+CONFIGFS_EATTR_OPS(target_fabric_nacl_base, se_node_acl, acl_group);
+
+static struct config_group *target_fabric_make_mappedlun(
+ struct config_group *group,
+ const char *name)
+{
+ struct se_node_acl *se_nacl = container_of(group,
+ struct se_node_acl, acl_group);
+ struct se_portal_group *se_tpg = se_nacl->se_tpg;
+ struct target_fabric_configfs *tf = se_tpg->se_tpg_wwn->wwn_tf;
+ struct se_lun_acl *lacl;
+ struct config_item *acl_ci;
+ char *buf, *endptr, *ptr;
+ u32 mapped_lun;
+ int ret = 0;
+
+ acl_ci = &group->cg_item;
+ if (!(acl_ci)) {
+ printk(KERN_ERR "Unable to locatel acl_ci\n");
+ return NULL;
+ }
+
+ buf = kzalloc(strlen(name) + 1, GFP_KERNEL);
+ if (!(buf)) {
+ printk(KERN_ERR "Unable to allocate memory for name buf\n");
+ return ERR_PTR(-ENOMEM);
+ }
+ snprintf(buf, strlen(name) + 1, "%s", name);
+ /*
+ * Make sure user is creating iscsi/$IQN/$TPGT/acls/$INITIATOR/lun_$ID.
+ */
+ ptr = strstr(buf, "lun_");
+ if (!(ptr)) {
+ printk(KERN_ERR "Unable to locate \"lun_\" from buf: %s"
+ " name: %s\n", buf, name);
+ ret = -EINVAL;
+ goto out;
+ }
+ ptr += 3; /* Skip to "_" */
+ *ptr = '\0'; /* Terminate the string */
+ ptr++; /* Advance pointer to next characater */
+
+ /*
+ * Determine the Mapped LUN value. This is what the SCSI Initiator
+ * Port will actually see.
+ */
+ mapped_lun = simple_strtoul(ptr, &endptr, 0);
+
+ lacl = core_dev_init_initiator_node_lun_acl(se_tpg, mapped_lun,
+ config_item_name(acl_ci), &ret);
+ if (!(lacl))
+ goto out;
+
+ config_group_init_type_name(&lacl->se_lun_group, name,
+ &TF_CIT_TMPL(tf)->tfc_tpg_mappedlun_cit);
+
+ kfree(buf);
+ return &lacl->se_lun_group;
+out:
+ kfree(buf);
+ return ERR_PTR(ret);
+}
+
+static void target_fabric_drop_mappedlun(
+ struct config_group *group,
+ struct config_item *item)
+{
+ struct se_lun_acl *lacl = container_of(to_config_group(item),
+ struct se_lun_acl, se_lun_group);
+ struct se_portal_group *se_tpg = lacl->se_lun_nacl->se_tpg;
+
+ config_item_put(item);
+ core_dev_free_initiator_node_lun_acl(se_tpg, lacl);
+}
+
+static struct configfs_item_operations target_fabric_nacl_base_item_ops = {
+ .show_attribute = target_fabric_nacl_base_attr_show,
+ .store_attribute = target_fabric_nacl_base_attr_store,
+};
+
+static struct configfs_group_operations target_fabric_nacl_base_group_ops = {
+ .make_group = target_fabric_make_mappedlun,
+ .drop_item = target_fabric_drop_mappedlun,
+};
+
+TF_CIT_SETUP(tpg_nacl_base, &target_fabric_nacl_base_item_ops,
+ &target_fabric_nacl_base_group_ops, NULL);
+
+/* End of tfc_tpg_nacl_base_cit */
+
+/* Start of tfc_tpg_nacl_cit */
+
+static struct config_group *target_fabric_make_nodeacl(
+ struct config_group *group,
+ const char *name)
+{
+ struct se_portal_group *se_tpg = container_of(group,
+ struct se_portal_group, tpg_acl_group);
+ struct target_fabric_configfs *tf = se_tpg->se_tpg_wwn->wwn_tf;
+ struct se_node_acl *se_nacl;
+ struct config_group *nacl_cg;
+
+ if (!(tf->tf_ops.fabric_make_nodeacl)) {
+ printk(KERN_ERR "tf->tf_ops.fabric_make_nodeacl is NULL\n");
+ return ERR_PTR(-ENOSYS);
+ }
+
+ se_nacl = tf->tf_ops.fabric_make_nodeacl(se_tpg, group, name);
+ if (IS_ERR(se_nacl))
+ return ERR_PTR(PTR_ERR(se_nacl));
+
+ nacl_cg = &se_nacl->acl_group;
+ nacl_cg->default_groups = se_nacl->acl_default_groups;
+ nacl_cg->default_groups[0] = &se_nacl->acl_attrib_group;
+ nacl_cg->default_groups[1] = &se_nacl->acl_auth_group;
+ nacl_cg->default_groups[2] = &se_nacl->acl_param_group;
+ nacl_cg->default_groups[3] = NULL;
+
+ config_group_init_type_name(&se_nacl->acl_group, name,
+ &TF_CIT_TMPL(tf)->tfc_tpg_nacl_base_cit);
+ config_group_init_type_name(&se_nacl->acl_attrib_group, "attrib",
+ &TF_CIT_TMPL(tf)->tfc_tpg_nacl_attrib_cit);
+ config_group_init_type_name(&se_nacl->acl_auth_group, "auth",
+ &TF_CIT_TMPL(tf)->tfc_tpg_nacl_auth_cit);
+ config_group_init_type_name(&se_nacl->acl_param_group, "param",
+ &TF_CIT_TMPL(tf)->tfc_tpg_nacl_param_cit);
+
+ return &se_nacl->acl_group;
+}
+
+static void target_fabric_drop_nodeacl(
+ struct config_group *group,
+ struct config_item *item)
+{
+ struct se_portal_group *se_tpg = container_of(group,
+ struct se_portal_group, tpg_acl_group);
+ struct target_fabric_configfs *tf = se_tpg->se_tpg_wwn->wwn_tf;
+ struct se_node_acl *se_nacl = container_of(to_config_group(item),
+ struct se_node_acl, acl_group);
+ struct config_item *df_item;
+ struct config_group *nacl_cg;
+ int i;
+
+ nacl_cg = &se_nacl->acl_group;
+ for (i = 0; nacl_cg->default_groups[i]; i++) {
+ df_item = &nacl_cg->default_groups[i]->cg_item;
+ nacl_cg->default_groups[i] = NULL;
+ config_item_put(df_item);
+ }
+
+ config_item_put(item);
+ tf->tf_ops.fabric_drop_nodeacl(se_nacl);
+}
+
+static struct configfs_group_operations target_fabric_nacl_group_ops = {
+ .make_group = target_fabric_make_nodeacl,
+ .drop_item = target_fabric_drop_nodeacl,
+};
+
+TF_CIT_SETUP(tpg_nacl, NULL, &target_fabric_nacl_group_ops, NULL);
+
+/* End of tfc_tpg_nacl_cit */
+
+/* Start of tfc_tpg_np_base_cit */
+
+CONFIGFS_EATTR_OPS(target_fabric_np_base, se_tpg_np, tpg_np_group);
+
+static struct configfs_item_operations target_fabric_np_base_item_ops = {
+ .show_attribute = target_fabric_np_base_attr_show,
+ .store_attribute = target_fabric_np_base_attr_store,
+};
+
+TF_CIT_SETUP(tpg_np_base, &target_fabric_np_base_item_ops, NULL, NULL);
+
+/* End of tfc_tpg_np_base_cit */
+
+/* Start of tfc_tpg_np_cit */
+
+static struct config_group *target_fabric_make_np(
+ struct config_group *group,
+ const char *name)
+{
+ struct se_portal_group *se_tpg = container_of(group,
+ struct se_portal_group, tpg_np_group);
+ struct target_fabric_configfs *tf = se_tpg->se_tpg_wwn->wwn_tf;
+ struct se_tpg_np *se_tpg_np;
+
+ if (!(tf->tf_ops.fabric_make_np)) {
+ printk(KERN_ERR "tf->tf_ops.fabric_make_np is NULL\n");
+ return ERR_PTR(-ENOSYS);
+ }
+
+ se_tpg_np = tf->tf_ops.fabric_make_np(se_tpg, group, name);
+ if (!(se_tpg_np) || IS_ERR(se_tpg_np))
+ return ERR_PTR(-EINVAL);
+
+ config_group_init_type_name(&se_tpg_np->tpg_np_group, name,
+ &TF_CIT_TMPL(tf)->tfc_tpg_np_base_cit);
+
+ return &se_tpg_np->tpg_np_group;
+}
+
+static void target_fabric_drop_np(
+ struct config_group *group,
+ struct config_item *item)
+{
+ struct se_portal_group *se_tpg = container_of(group,
+ struct se_portal_group, tpg_np_group);
+ struct target_fabric_configfs *tf = se_tpg->se_tpg_wwn->wwn_tf;
+ struct se_tpg_np *se_tpg_np = container_of(to_config_group(item),
+ struct se_tpg_np, tpg_np_group);
+
+ config_item_put(item);
+ tf->tf_ops.fabric_drop_np(se_tpg_np);
+}
+
+static struct configfs_group_operations target_fabric_np_group_ops = {
+ .make_group = &target_fabric_make_np,
+ .drop_item = &target_fabric_drop_np,
+};
+
+TF_CIT_SETUP(tpg_np, NULL, &target_fabric_np_group_ops, NULL);
+
+/* End of tfc_tpg_np_cit */
+
+/* Start of tfc_tpg_port_cit */
+
+CONFIGFS_EATTR_STRUCT(target_fabric_port, se_lun);
+#define TCM_PORT_ATTR(_name, _mode) \
+static struct target_fabric_port_attribute target_fabric_port_##_name = \
+ __CONFIGFS_EATTR(_name, _mode, \
+ target_fabric_port_show_attr_##_name, \
+ target_fabric_port_store_attr_##_name);
+
+#define TCM_PORT_ATTOR_RO(_name) \
+ __CONFIGFS_EATTR_RO(_name, \
+ target_fabric_port_show_attr_##_name);
+
+/*
+ * alua_tg_pt_gp
+ */
+static ssize_t target_fabric_port_show_attr_alua_tg_pt_gp(
+ struct se_lun *lun,
+ char *page)
+{
+ if (!(lun))
+ return -ENODEV;
+
+ if (!(lun->lun_sep))
+ return -ENODEV;
+
+ return core_alua_show_tg_pt_gp_info(lun->lun_sep, page);
+}
+
+static ssize_t target_fabric_port_store_attr_alua_tg_pt_gp(
+ struct se_lun *lun,
+ const char *page,
+ size_t count)
+{
+ if (!(lun))
+ return -ENODEV;
+
+ if (!(lun->lun_sep))
+ return -ENODEV;
+
+ return core_alua_store_tg_pt_gp_info(lun->lun_sep, page, count);
+}
+
+TCM_PORT_ATTR(alua_tg_pt_gp, S_IRUGO | S_IWUSR);
+
+/*
+ * alua_tg_pt_offline
+ */
+static ssize_t target_fabric_port_show_attr_alua_tg_pt_offline(
+ struct se_lun *lun,
+ char *page)
+{
+ if (!(lun))
+ return -ENODEV;
+
+ if (!(lun->lun_sep))
+ return -ENODEV;
+
+ return core_alua_show_offline_bit(lun, page);
+}
+
+static ssize_t target_fabric_port_store_attr_alua_tg_pt_offline(
+ struct se_lun *lun,
+ const char *page,
+ size_t count)
+{
+ if (!(lun))
+ return -ENODEV;
+
+ if (!(lun->lun_sep))
+ return -ENODEV;
+
+ return core_alua_store_offline_bit(lun, page, count);
+}
+
+TCM_PORT_ATTR(alua_tg_pt_offline, S_IRUGO | S_IWUSR);
+
+/*
+ * alua_tg_pt_status
+ */
+static ssize_t target_fabric_port_show_attr_alua_tg_pt_status(
+ struct se_lun *lun,
+ char *page)
+{
+ if (!(lun))
+ return -ENODEV;
+
+ if (!(lun->lun_sep))
+ return -ENODEV;
+
+ return core_alua_show_secondary_status(lun, page);
+}
+
+static ssize_t target_fabric_port_store_attr_alua_tg_pt_status(
+ struct se_lun *lun,
+ const char *page,
+ size_t count)
+{
+ if (!(lun))
+ return -ENODEV;
+
+ if (!(lun->lun_sep))
+ return -ENODEV;
+
+ return core_alua_store_secondary_status(lun, page, count);
+}
+
+TCM_PORT_ATTR(alua_tg_pt_status, S_IRUGO | S_IWUSR);
+
+/*
+ * alua_tg_pt_write_md
+ */
+static ssize_t target_fabric_port_show_attr_alua_tg_pt_write_md(
+ struct se_lun *lun,
+ char *page)
+{
+ if (!(lun))
+ return -ENODEV;
+
+ if (!(lun->lun_sep))
+ return -ENODEV;
+
+ return core_alua_show_secondary_write_metadata(lun, page);
+}
+
+static ssize_t target_fabric_port_store_attr_alua_tg_pt_write_md(
+ struct se_lun *lun,
+ const char *page,
+ size_t count)
+{
+ if (!(lun))
+ return -ENODEV;
+
+ if (!(lun->lun_sep))
+ return -ENODEV;
+
+ return core_alua_store_secondary_write_metadata(lun, page, count);
+}
+
+TCM_PORT_ATTR(alua_tg_pt_write_md, S_IRUGO | S_IWUSR);
+
+
+static struct configfs_attribute *target_fabric_port_attrs[] = {
+ &target_fabric_port_alua_tg_pt_gp.attr,
+ &target_fabric_port_alua_tg_pt_offline.attr,
+ &target_fabric_port_alua_tg_pt_status.attr,
+ &target_fabric_port_alua_tg_pt_write_md.attr,
+ NULL,
+};
+
+CONFIGFS_EATTR_OPS(target_fabric_port, se_lun, lun_group);
+
+static int target_fabric_port_link(
+ struct config_item *lun_ci,
+ struct config_item *se_dev_ci)
+{
+ struct config_item *tpg_ci;
+ struct se_device *dev;
+ struct se_lun *lun = container_of(to_config_group(lun_ci),
+ struct se_lun, lun_group);
+ struct se_lun *lun_p;
+ struct se_portal_group *se_tpg;
+ struct se_subsystem_dev *se_dev = container_of(
+ to_config_group(se_dev_ci), struct se_subsystem_dev,
+ se_dev_group);
+ struct target_fabric_configfs *tf;
+ int ret;
+
+ tpg_ci = &lun_ci->ci_parent->ci_group->cg_item;
+ se_tpg = container_of(to_config_group(tpg_ci),
+ struct se_portal_group, tpg_group);
+ tf = se_tpg->se_tpg_wwn->wwn_tf;
+
+ if (lun->lun_se_dev!= NULL) {
+ printk(KERN_ERR "Port Symlink already exists\n");
+ return -EEXIST;
+ }
+
+ dev = se_dev->se_dev_ptr;
+ if (!(dev)) {
+ printk(KERN_ERR "Unable to locate struct se_device pointer from"
+ " %s\n", config_item_name(se_dev_ci));
+ ret = -ENODEV;
+ goto out;
+ }
+
+ lun_p = core_dev_add_lun(se_tpg, dev->se_hba, dev,
+ lun->unpacked_lun);
+ if ((IS_ERR(lun_p)) || !(lun_p)) {
+ printk(KERN_ERR "core_dev_add_lun() failed\n");
+ ret = -EINVAL;
+ goto out;
+ }
+
+ if (tf->tf_ops.fabric_post_link) {
+ /*
+ * Call the optional fabric_post_link() to allow a
+ * fabric module to setup any additional state once
+ * core_dev_add_lun() has been called..
+ */
+ tf->tf_ops.fabric_post_link(se_tpg, lun);
+ }
+
+ return 0;
+out:
+ return ret;
+}
+
+static int target_fabric_port_unlink(
+ struct config_item *lun_ci,
+ struct config_item *se_dev_ci)
+{
+ struct se_lun *lun = container_of(to_config_group(lun_ci),
+ struct se_lun, lun_group);
+ struct se_portal_group *se_tpg = lun->lun_sep->sep_tpg;
+ struct target_fabric_configfs *tf = se_tpg->se_tpg_wwn->wwn_tf;
+
+ if (tf->tf_ops.fabric_pre_unlink) {
+ /*
+ * Call the optional fabric_pre_unlink() to allow a
+ * fabric module to release any additional stat before
+ * core_dev_del_lun() is called.
+ */
+ tf->tf_ops.fabric_pre_unlink(se_tpg, lun);
+ }
+
+ core_dev_del_lun(se_tpg, lun->unpacked_lun);
+ return 0;
+}
+
+static struct configfs_item_operations target_fabric_port_item_ops = {
+ .show_attribute = target_fabric_port_attr_show,
+ .store_attribute = target_fabric_port_attr_store,
+ .allow_link = target_fabric_port_link,
+ .drop_link = target_fabric_port_unlink,
+};
+
+TF_CIT_SETUP(tpg_port, &target_fabric_port_item_ops, NULL, target_fabric_port_attrs);
+
+/* End of tfc_tpg_port_cit */
+
+/* Start of tfc_tpg_lun_cit */
+
+static struct config_group *target_fabric_make_lun(
+ struct config_group *group,
+ const char *name)
+{
+ struct se_lun *lun;
+ struct se_portal_group *se_tpg = container_of(group,
+ struct se_portal_group, tpg_lun_group);
+ struct target_fabric_configfs *tf = se_tpg->se_tpg_wwn->wwn_tf;
+
+ char *str, *endptr;
+ u32 unpacked_lun;
+
+ str = strstr(name, "_");
+ if (!(str)) {
+ printk(KERN_ERR "Unable to locate \'_\" in"
+ " \"lun_$LUN_NUMBER\"\n");
+ return NULL;
+ }
+ str++; /* Advance over _ delim.. */
+ unpacked_lun = simple_strtoul(str, &endptr, 0);
+
+ lun = core_get_lun_from_tpg(se_tpg, unpacked_lun);
+ if (!(lun))
+ return ERR_PTR(-EINVAL);
+
+ config_group_init_type_name(&lun->lun_group, name,
+ &TF_CIT_TMPL(tf)->tfc_tpg_port_cit);
+
+ return &lun->lun_group;
+}
+
+static void target_fabric_drop_lun(
+ struct config_group *group,
+ struct config_item *item)
+{
+ config_item_put(item);
+}
+
+static struct configfs_group_operations target_fabric_lun_group_ops = {
+ .make_group = &target_fabric_make_lun,
+ .drop_item = &target_fabric_drop_lun,
+};
+
+TF_CIT_SETUP(tpg_lun, NULL, &target_fabric_lun_group_ops, NULL);
+
+/* End of tfc_tpg_lun_cit */
+
+/* Start of tfc_tpg_attrib_cit */
+
+CONFIGFS_EATTR_OPS(target_fabric_tpg_attrib, se_portal_group, tpg_attrib_group);
+
+static struct configfs_item_operations target_fabric_tpg_attrib_item_ops = {
+ .show_attribute = target_fabric_tpg_attrib_attr_show,
+ .store_attribute = target_fabric_tpg_attrib_attr_store,
+};
+
+TF_CIT_SETUP(tpg_attrib, &target_fabric_tpg_attrib_item_ops, NULL, NULL);
+
+/* End of tfc_tpg_attrib_cit */
+
+/* Start of tfc_tpg_param_cit */
+
+CONFIGFS_EATTR_OPS(target_fabric_tpg_param, se_portal_group, tpg_param_group);
+
+static struct configfs_item_operations target_fabric_tpg_param_item_ops = {
+ .show_attribute = target_fabric_tpg_param_attr_show,
+ .store_attribute = target_fabric_tpg_param_attr_store,
+};
+
+TF_CIT_SETUP(tpg_param, &target_fabric_tpg_param_item_ops, NULL, NULL);
+
+/* End of tfc_tpg_param_cit */
+
+/* Start of tfc_tpg_base_cit */
+/*
+ * For use with TF_TPG_ATTR() and TF_TPG_ATTR_RO()
+ */
+CONFIGFS_EATTR_OPS(target_fabric_tpg, se_portal_group, tpg_group);
+
+static struct configfs_item_operations target_fabric_tpg_base_item_ops = {
+ .show_attribute = target_fabric_tpg_attr_show,
+ .store_attribute = target_fabric_tpg_attr_store,
+};
+
+TF_CIT_SETUP(tpg_base, &target_fabric_tpg_base_item_ops, NULL, NULL);
+
+/* End of tfc_tpg_base_cit */
+
+/* Start of tfc_tpg_cit */
+
+static struct config_group *target_fabric_make_tpg(
+ struct config_group *group,
+ const char *name)
+{
+ struct se_wwn *wwn = container_of(group, struct se_wwn, wwn_group);
+ struct target_fabric_configfs *tf = wwn->wwn_tf;
+ struct se_portal_group *se_tpg;
+
+ if (!(tf->tf_ops.fabric_make_tpg)) {
+ printk(KERN_ERR "tf->tf_ops.fabric_make_tpg is NULL\n");
+ return ERR_PTR(-ENOSYS);
+ }
+
+ se_tpg = tf->tf_ops.fabric_make_tpg(wwn, group, name);
+ if (!(se_tpg) || IS_ERR(se_tpg))
+ return ERR_PTR(-EINVAL);
+ /*
+ * Setup default groups from pre-allocated se_tpg->tpg_default_groups
+ */
+ se_tpg->tpg_group.default_groups = se_tpg->tpg_default_groups;
+ se_tpg->tpg_group.default_groups[0] = &se_tpg->tpg_lun_group;
+ se_tpg->tpg_group.default_groups[1] = &se_tpg->tpg_np_group;
+ se_tpg->tpg_group.default_groups[2] = &se_tpg->tpg_acl_group;
+ se_tpg->tpg_group.default_groups[3] = &se_tpg->tpg_attrib_group;
+ se_tpg->tpg_group.default_groups[4] = &se_tpg->tpg_param_group;
+ se_tpg->tpg_group.default_groups[5] = NULL;
+
+ config_group_init_type_name(&se_tpg->tpg_group, name,
+ &TF_CIT_TMPL(tf)->tfc_tpg_base_cit);
+ config_group_init_type_name(&se_tpg->tpg_lun_group, "lun",
+ &TF_CIT_TMPL(tf)->tfc_tpg_lun_cit);
+ config_group_init_type_name(&se_tpg->tpg_np_group, "np",
+ &TF_CIT_TMPL(tf)->tfc_tpg_np_cit);
+ config_group_init_type_name(&se_tpg->tpg_acl_group, "acls",
+ &TF_CIT_TMPL(tf)->tfc_tpg_nacl_cit);
+ config_group_init_type_name(&se_tpg->tpg_attrib_group, "attrib",
+ &TF_CIT_TMPL(tf)->tfc_tpg_attrib_cit);
+ config_group_init_type_name(&se_tpg->tpg_param_group, "param",
+ &TF_CIT_TMPL(tf)->tfc_tpg_param_cit);
+
+ return &se_tpg->tpg_group;
+}
+
+static void target_fabric_drop_tpg(
+ struct config_group *group,
+ struct config_item *item)
+{
+ struct se_wwn *wwn = container_of(group, struct se_wwn, wwn_group);
+ struct target_fabric_configfs *tf = wwn->wwn_tf;
+ struct se_portal_group *se_tpg = container_of(to_config_group(item),
+ struct se_portal_group, tpg_group);
+ struct config_group *tpg_cg = &se_tpg->tpg_group;
+ struct config_item *df_item;
+ int i;
+ /*
+ * Release default groups, but do not release tpg_cg->default_groups
+ * memory as it is statically allocated at se_tpg->tpg_default_groups.
+ */
+ for (i = 0; tpg_cg->default_groups[i]; i++) {
+ df_item = &tpg_cg->default_groups[i]->cg_item;
+ tpg_cg->default_groups[i] = NULL;
+ config_item_put(df_item);
+ }
+
+ config_item_put(item);
+ tf->tf_ops.fabric_drop_tpg(se_tpg);
+}
+
+static struct configfs_group_operations target_fabric_tpg_group_ops = {
+ .make_group = target_fabric_make_tpg,
+ .drop_item = target_fabric_drop_tpg,
+};
+
+TF_CIT_SETUP(tpg, NULL, &target_fabric_tpg_group_ops, NULL);
+
+/* End of tfc_tpg_cit */
+
+/* Start of tfc_wwn_cit */
+
+static struct config_group *target_fabric_make_wwn(
+ struct config_group *group,
+ const char *name)
+{
+ struct target_fabric_configfs *tf = container_of(group,
+ struct target_fabric_configfs, tf_group);
+ struct se_wwn *wwn;
+
+ if (!(tf->tf_ops.fabric_make_wwn)) {
+ printk(KERN_ERR "tf->tf_ops.fabric_make_wwn is NULL\n");
+ return ERR_PTR(-ENOSYS);
+ }
+
+ wwn = tf->tf_ops.fabric_make_wwn(tf, group, name);
+ if (!(wwn) || IS_ERR(wwn))
+ return ERR_PTR(-EINVAL);
+
+ wwn->wwn_tf = tf;
+ config_group_init_type_name(&wwn->wwn_group, name,
+ &TF_CIT_TMPL(tf)->tfc_tpg_cit);
+
+ return &wwn->wwn_group;
+}
+
+static void target_fabric_drop_wwn(
+ struct config_group *group,
+ struct config_item *item)
+{
+ struct target_fabric_configfs *tf = container_of(group,
+ struct target_fabric_configfs, tf_group);
+ struct se_wwn *wwn = container_of(to_config_group(item),
+ struct se_wwn, wwn_group);
+
+ config_item_put(item);
+ tf->tf_ops.fabric_drop_wwn(wwn);
+}
+
+static struct configfs_group_operations target_fabric_wwn_group_ops = {
+ .make_group = target_fabric_make_wwn,
+ .drop_item = target_fabric_drop_wwn,
+};
+/*
+ * For use with TF_WWN_ATTR() and TF_WWN_ATTR_RO()
+ */
+CONFIGFS_EATTR_OPS(target_fabric_wwn, target_fabric_configfs, tf_group);
+
+static struct configfs_item_operations target_fabric_wwn_item_ops = {
+ .show_attribute = target_fabric_wwn_attr_show,
+ .store_attribute = target_fabric_wwn_attr_store,
+};
+
+TF_CIT_SETUP(wwn, &target_fabric_wwn_item_ops, &target_fabric_wwn_group_ops, NULL);
+
+/* End of tfc_wwn_cit */
+
+/* Start of tfc_discovery_cit */
+
+CONFIGFS_EATTR_OPS(target_fabric_discovery, target_fabric_configfs,
+ tf_disc_group);
+
+static struct configfs_item_operations target_fabric_discovery_item_ops = {
+ .show_attribute = target_fabric_discovery_attr_show,
+ .store_attribute = target_fabric_discovery_attr_store,
+};
+
+TF_CIT_SETUP(discovery, &target_fabric_discovery_item_ops, NULL, NULL);
+
+/* End of tfc_discovery_cit */
+
+int target_fabric_setup_cits(struct target_fabric_configfs *tf)
+{
+ target_fabric_setup_discovery_cit(tf);
+ target_fabric_setup_wwn_cit(tf);
+ target_fabric_setup_tpg_cit(tf);
+ target_fabric_setup_tpg_base_cit(tf);
+ target_fabric_setup_tpg_port_cit(tf);
+ target_fabric_setup_tpg_lun_cit(tf);
+ target_fabric_setup_tpg_np_cit(tf);
+ target_fabric_setup_tpg_np_base_cit(tf);
+ target_fabric_setup_tpg_attrib_cit(tf);
+ target_fabric_setup_tpg_param_cit(tf);
+ target_fabric_setup_tpg_nacl_cit(tf);
+ target_fabric_setup_tpg_nacl_base_cit(tf);
+ target_fabric_setup_tpg_nacl_attrib_cit(tf);
+ target_fabric_setup_tpg_nacl_auth_cit(tf);
+ target_fabric_setup_tpg_nacl_param_cit(tf);
+ target_fabric_setup_tpg_mappedlun_cit(tf);
+
+ return 0;
+}
diff --git a/include/target/target_core_fabric_configfs.h b/include/target/target_core_fabric_configfs.h
new file mode 100644
index 0000000..a26fb75
--- /dev/null
+++ b/include/target/target_core_fabric_configfs.h
@@ -0,0 +1,106 @@
+/*
+ * Used for tfc_wwn_cit attributes
+ */
+
+#include <target/configfs_macros.h>
+
+CONFIGFS_EATTR_STRUCT(target_fabric_nacl_attrib, se_node_acl);
+#define TF_NACL_ATTRIB_ATTR(_fabric, _name, _mode) \
+static struct target_fabric_nacl_attrib_attribute _fabric##_nacl_attrib_##_name = \
+ __CONFIGFS_EATTR(_name, _mode, \
+ _fabric##_nacl_attrib_show_##_name, \
+ _fabric##_nacl_attrib_store_##_name);
+
+CONFIGFS_EATTR_STRUCT(target_fabric_nacl_auth, se_node_acl);
+#define TF_NACL_AUTH_ATTR(_fabric, _name, _mode) \
+static struct target_fabric_nacl_auth_attribute _fabric##_nacl_auth_##_name = \
+ __CONFIGFS_EATTR(_name, _mode, \
+ _fabric##_nacl_auth_show_##_name, \
+ _fabric##_nacl_auth_store_##_name);
+
+#define TF_NACL_AUTH_ATTR_RO(_fabric, _name) \
+static struct target_fabric_nacl_auth_attribute _fabric##_nacl_auth_##_name = \
+ __CONFIGFS_EATTR_RO(_name, \
+ _fabric##_nacl_auth_show_##_name);
+
+CONFIGFS_EATTR_STRUCT(target_fabric_nacl_param, se_node_acl);
+#define TF_NACL_PARAM_ATTR(_fabric, _name, _mode) \
+static struct target_fabric_nacl_param_attribute _fabric##_nacl_param_##_name = \
+ __CONFIGFS_EATTR(_name, _mode, \
+ _fabric##_nacl_param_show_##_name, \
+ _fabric##_nacl_param_store_##_name);
+
+#define TF_NACL_PARAM_ATTR_RO(_fabric, _name) \
+static struct target_fabric_nacl_param_attribute _fabric##_nacl_param_##_name = \
+ __CONFIGFS_EATTR_RO(_name, \
+ _fabric##_nacl_param_show_##_name);
+
+
+CONFIGFS_EATTR_STRUCT(target_fabric_nacl_base, se_node_acl);
+#define TF_NACL_BASE_ATTR(_fabric, _name, _mode) \
+static struct target_fabric_nacl_base_attribute _fabric##_nacl_##_name = \
+ __CONFIGFS_EATTR(_name, _mode, \
+ _fabric##_nacl_show_##_name, \
+ _fabric##_nacl_store_##_name);
+
+#define TF_NACL_BASE_ATTR_RO(_fabric, _name) \
+static struct target_fabric_nacl_base_attribute _fabric##_nacl_##_name = \
+ __CONFIGFS_EATTR_RO(_name, \
+ _fabric##_nacl_show_##_name);
+
+CONFIGFS_EATTR_STRUCT(target_fabric_np_base, se_tpg_np);
+#define TF_NP_BASE_ATTR(_fabric, _name, _mode) \
+static struct target_fabric_np_base_attribute _fabric##_np_##_name = \
+ __CONFIGFS_EATTR(_name, _mode, \
+ _fabric##_np_show_##_name, \
+ _fabric##_np_store_##_name);
+
+CONFIGFS_EATTR_STRUCT(target_fabric_tpg_attrib, se_portal_group);
+#define TF_TPG_ATTRIB_ATTR(_fabric, _name, _mode) \
+static struct target_fabric_tpg_attrib_attribute _fabric##_tpg_attrib_##_name = \
+ __CONFIGFS_EATTR(_name, _mode, \
+ _fabric##_tpg_attrib_show_##_name, \
+ _fabric##_tpg_attrib_store_##_name);
+
+
+CONFIGFS_EATTR_STRUCT(target_fabric_tpg_param, se_portal_group);
+#define TF_TPG_PARAM_ATTR(_fabric, _name, _mode) \
+static struct target_fabric_tpg_param_attribute _fabric##_tpg_param_##_name = \
+ __CONFIGFS_EATTR(_name, _mode, \
+ _fabric##_tpg_param_show_##_name, \
+ _fabric##_tpg_param_store_##_name);
+
+
+CONFIGFS_EATTR_STRUCT(target_fabric_tpg, se_portal_group);
+#define TF_TPG_BASE_ATTR(_fabric, _name, _mode) \
+static struct target_fabric_tpg_attribute _fabric##_tpg_##_name = \
+ __CONFIGFS_EATTR(_name, _mode, \
+ _fabric##_tpg_show_##_name, \
+ _fabric##_tpg_store_##_name);
+
+
+CONFIGFS_EATTR_STRUCT(target_fabric_wwn, target_fabric_configfs);
+#define TF_WWN_ATTR(_fabric, _name, _mode) \
+static struct target_fabric_wwn_attribute _fabric##_wwn_##_name = \
+ __CONFIGFS_EATTR(_name, _mode, \
+ _fabric##_wwn_show_attr_##_name, \
+ _fabric##_wwn_store_attr_##_name);
+
+#define TF_WWN_ATTR_RO(_fabric, _name) \
+static struct target_fabric_wwn_attribute _fabric##_wwn_##_name = \
+ __CONFIGFS_EATTR_RO(_name, \
+ _fabric##_wwn_show_attr_##_name);
+
+CONFIGFS_EATTR_STRUCT(target_fabric_discovery, target_fabric_configfs);
+#define TF_DISC_ATTR(_fabric, _name, _mode) \
+static struct target_fabric_discovery_attribute _fabric##_disc_##_name = \
+ __CONFIGFS_EATTR(_name, _mode, \
+ _fabric##_disc_show_##_name, \
+ _fabric##_disc_store_##_name);
+
+#define TF_DISC_ATTR_RO(_fabric, _name) \
+static struct target_fabric_discovery_attribute _fabric##_disc_##_name = \
+ __CONFIGFS_EATTR_RO(_name, \
+ _fabric##_disc_show_##_name);
+
+extern int target_fabric_setup_cits(struct target_fabric_configfs *);
--
1.7.3.4
^ permalink raw reply related [flat|nested] 22+ messages in thread* [PATCH v2 02r/03] target: Add generic ProtoID and TransportID fabric handlers for SAS, FC, and iSCSI
2010-12-17 21:11 [PATCH v2 00/03] target: Initial merge of v4.0.0-rc6 for .38 Nicholas A. Bellinger
` (17 preceding siblings ...)
2010-12-17 21:11 ` [PATCH v2 02q/03] target: Add generic fabric independent ConfigFS infrastructure Nicholas A. Bellinger
@ 2010-12-17 21:11 ` Nicholas A. Bellinger
2010-12-17 21:11 ` [PATCH v2 02s/03] target: Add Kbuild and Kconfig for drivers/target and Documentation/target/ Nicholas A. Bellinger
2010-12-17 21:11 ` [PATCH v2 03/03] tcm_loop: Add multi-fabric Linux/SCSI LLD fabric module Nicholas A. Bellinger
20 siblings, 0 replies; 22+ messages in thread
From: Nicholas A. Bellinger @ 2010-12-17 21:11 UTC (permalink / raw)
To: linux-scsi, James Bottomley; +Cc: Nicholas Bellinger
From: Nicholas Bellinger <nab@linux-iscsi.org>
This patch adds a set of generic SAS, FC and iSCSI handlers into target_core_fabric_lib.c
that contain fabric dependent logic for ProtocolID (PIV) and TransportID processing
releated to >= SPC-3 persistent reservation SCSI Initiator and Target Port WWNs. These
generic handlers follow SPC-4 and are based on protocol dependent code in TCM_Loop, TCM_FC
and LIO-Target modules.
This a patch also allows TCM fabric modules to optionally support more than a single SCSI protcol
on a per fabric target endpoint (WWN+TPGT) context basis.
Signed-off-by: Nicholas A. Bellinger <nab@linux-iscsi.org>
---
drivers/target/target_core_fabric_lib.c | 451 +++++++++++++++++++++++++++++++
include/target/target_core_fabric_lib.h | 28 ++
2 files changed, 479 insertions(+), 0 deletions(-)
create mode 100644 drivers/target/target_core_fabric_lib.c
create mode 100644 include/target/target_core_fabric_lib.h
diff --git a/drivers/target/target_core_fabric_lib.c b/drivers/target/target_core_fabric_lib.c
new file mode 100644
index 0000000..54a1b47
--- /dev/null
+++ b/drivers/target/target_core_fabric_lib.c
@@ -0,0 +1,451 @@
+/*******************************************************************************
+ * Filename: target_core_fabric_lib.c
+ *
+ * This file contains generic high level protocol identifier and PR
+ * handlers for TCM fabric modules
+ *
+ * Copyright (c) 2010 Rising Tide Systems, Inc.
+ * Copyright (c) 2010 Linux-iSCSI.org
+ *
+ * Nicholas A. Bellinger <nab@linux-iscsi.org>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+ *
+ ******************************************************************************/
+
+#include <linux/string.h>
+#include <linux/ctype.h>
+#include <linux/spinlock.h>
+#include <linux/smp_lock.h>
+#include <scsi/scsi.h>
+#include <scsi/scsi_cmnd.h>
+
+#include <target/target_core_base.h>
+#include <target/target_core_device.h>
+#include <target/target_core_transport.h>
+#include <target/target_core_fabric_ops.h>
+#include <target/target_core_configfs.h>
+
+#include "target_core_hba.h"
+#include "target_core_pr.h"
+
+/*
+ * Handlers for Serial Attached SCSI (SAS)
+ */
+u8 sas_get_fabric_proto_ident(struct se_portal_group *se_tpg)
+{
+ /*
+ * Return a SAS Serial SCSI Protocol identifier for loopback operations
+ * This is defined in section 7.5.1 Table 362 in spc4r17
+ */
+ return 0x6;
+}
+EXPORT_SYMBOL(sas_get_fabric_proto_ident);
+
+u32 sas_get_pr_transport_id(
+ struct se_portal_group *se_tpg,
+ struct se_node_acl *se_nacl,
+ struct t10_pr_registration *pr_reg,
+ int *format_code,
+ unsigned char *buf)
+{
+ unsigned char binary, *ptr;
+ int i;
+ u32 off = 4;
+ /*
+ * Set PROTOCOL IDENTIFIER to 6h for SAS
+ */
+ buf[0] = 0x06;
+ /*
+ * From spc4r17, 7.5.4.7 TransportID for initiator ports using SCSI
+ * over SAS Serial SCSI Protocol
+ */
+ ptr = &se_nacl->initiatorname[4]; /* Skip over 'naa. prefix */
+
+ for (i = 0; i < 16; i += 2) {
+ binary = transport_asciihex_to_binaryhex(&ptr[i]);
+ buf[off++] = binary;
+ }
+ /*
+ * The SAS Transport ID is a hardcoded 24-byte length
+ */
+ return 24;
+}
+EXPORT_SYMBOL(sas_get_pr_transport_id);
+
+u32 sas_get_pr_transport_id_len(
+ struct se_portal_group *se_tpg,
+ struct se_node_acl *se_nacl,
+ struct t10_pr_registration *pr_reg,
+ int *format_code)
+{
+ *format_code = 0;
+ /*
+ * From spc4r17, 7.5.4.7 TransportID for initiator ports using SCSI
+ * over SAS Serial SCSI Protocol
+ *
+ * The SAS Transport ID is a hardcoded 24-byte length
+ */
+ return 24;
+}
+EXPORT_SYMBOL(sas_get_pr_transport_id_len);
+
+/*
+ * Used for handling SCSI fabric dependent TransportIDs in SPC-3 and above
+ * Persistent Reservation SPEC_I_PT=1 and PROUT REGISTER_AND_MOVE operations.
+ */
+char *sas_parse_pr_out_transport_id(
+ struct se_portal_group *se_tpg,
+ const char *buf,
+ u32 *out_tid_len,
+ char **port_nexus_ptr)
+{
+ /*
+ * Assume the FORMAT CODE 00b from spc4r17, 7.5.4.7 TransportID
+ * for initiator ports using SCSI over SAS Serial SCSI Protocol
+ *
+ * The TransportID for a SAS Initiator Port is of fixed size of
+ * 24 bytes, and SAS does not contain a I_T nexus identifier,
+ * so we return the **port_nexus_ptr set to NULL.
+ */
+ *port_nexus_ptr = NULL;
+ *out_tid_len = 24;
+
+ return (char *)&buf[4];
+}
+EXPORT_SYMBOL(sas_parse_pr_out_transport_id);
+
+/*
+ * Handlers for Fibre Channel Protocol (FCP)
+ */
+u8 fc_get_fabric_proto_ident(struct se_portal_group *se_tpg)
+{
+ return 0x0; /* 0 = fcp-2 per SPC4 section 7.5.1 */
+}
+EXPORT_SYMBOL(fc_get_fabric_proto_ident);
+
+u32 fc_get_pr_transport_id_len(
+ struct se_portal_group *se_tpg,
+ struct se_node_acl *se_nacl,
+ struct t10_pr_registration *pr_reg,
+ int *format_code)
+{
+ *format_code = 0;
+ /*
+ * The FC Transport ID is a hardcoded 24-byte length
+ */
+ return 24;
+}
+EXPORT_SYMBOL(fc_get_pr_transport_id_len);
+
+u32 fc_get_pr_transport_id(
+ struct se_portal_group *se_tpg,
+ struct se_node_acl *se_nacl,
+ struct t10_pr_registration *pr_reg,
+ int *format_code,
+ unsigned char *buf)
+{
+ unsigned char binary, *ptr;
+ int i;
+ u32 off = 8;
+ /*
+ * PROTOCOL IDENTIFIER is 0h for FCP-2
+ *
+ * From spc4r17, 7.5.4.2 TransportID for initiator ports using
+ * SCSI over Fibre Channel
+ *
+ * We convert the ASCII formatted N Port name into a binary
+ * encoded TransportID.
+ */
+ ptr = &se_nacl->initiatorname[0];
+
+ for (i = 0; i < 24; ) {
+ if (!(strncmp(&ptr[i], ":", 1))) {
+ i++;
+ continue;
+ }
+ binary = transport_asciihex_to_binaryhex(&ptr[i]);
+ buf[off++] = binary;
+ i += 2;
+ }
+ /*
+ * The FC Transport ID is a hardcoded 24-byte length
+ */
+ return 24;
+}
+EXPORT_SYMBOL(fc_get_pr_transport_id);
+
+char *fc_parse_pr_out_transport_id(
+ struct se_portal_group *se_tpg,
+ const char *buf,
+ u32 *out_tid_len,
+ char **port_nexus_ptr)
+{
+ /*
+ * The TransportID for a FC N Port is of fixed size of
+ * 24 bytes, and FC does not contain a I_T nexus identifier,
+ * so we return the **port_nexus_ptr set to NULL.
+ */
+ *port_nexus_ptr = NULL;
+ *out_tid_len = 24;
+
+ return (char *)&buf[8];
+}
+EXPORT_SYMBOL(fc_parse_pr_out_transport_id);
+
+/*
+ * Handlers for Internet Small Computer Systems Interface (iSCSI)
+ */
+
+u8 iscsi_get_fabric_proto_ident(struct se_portal_group *se_tpg)
+{
+ /*
+ * This value is defined for "Internet SCSI (iSCSI)"
+ * in spc4r17 section 7.5.1 Table 362
+ */
+ return 0x5;
+}
+EXPORT_SYMBOL(iscsi_get_fabric_proto_ident);
+
+u32 iscsi_get_pr_transport_id(
+ struct se_portal_group *se_tpg,
+ struct se_node_acl *se_nacl,
+ struct t10_pr_registration *pr_reg,
+ int *format_code,
+ unsigned char *buf)
+{
+ u32 off = 4, padding = 0;
+ u16 len = 0;
+
+ spin_lock_irq(&se_nacl->nacl_sess_lock);
+ /*
+ * Set PROTOCOL IDENTIFIER to 5h for iSCSI
+ */
+ buf[0] = 0x05;
+ /*
+ * From spc4r17 Section 7.5.4.6: TransportID for initiator
+ * ports using SCSI over iSCSI.
+ *
+ * The null-terminated, null-padded (see 4.4.2) ISCSI NAME field
+ * shall contain the iSCSI name of an iSCSI initiator node (see
+ * RFC 3720). The first ISCSI NAME field byte containing an ASCII
+ * null character terminates the ISCSI NAME field without regard for
+ * the specified length of the iSCSI TransportID or the contents of
+ * the ADDITIONAL LENGTH field.
+ */
+ len = sprintf(&buf[off], "%s", se_nacl->initiatorname);
+ /*
+ * Add Extra byte for NULL terminator
+ */
+ len++;
+ /*
+ * If there is ISID present with the registration and *format code == 1
+ * 1, use iSCSI Initiator port TransportID format.
+ *
+ * Otherwise use iSCSI Initiator device TransportID format that
+ * does not contain the ASCII encoded iSCSI Initiator iSID value
+ * provied by the iSCSi Initiator during the iSCSI login process.
+ */
+ if ((*format_code == 1) && (pr_reg->isid_present_at_reg)) {
+ /*
+ * Set FORMAT CODE 01b for iSCSI Initiator port TransportID
+ * format.
+ */
+ buf[0] |= 0x40;
+ /*
+ * From spc4r17 Section 7.5.4.6: TransportID for initiator
+ * ports using SCSI over iSCSI. Table 390
+ *
+ * The SEPARATOR field shall contain the five ASCII
+ * characters ",i,0x".
+ *
+ * The null-terminated, null-padded ISCSI INITIATOR SESSION ID
+ * field shall contain the iSCSI initiator session identifier
+ * (see RFC 3720) in the form of ASCII characters that are the
+ * hexadecimal digits converted from the binary iSCSI initiator
+ * session identifier value. The first ISCSI INITIATOR SESSION
+ * ID field byte containing an ASCII null character
+ */
+ buf[off+len] = 0x2c; off++; /* ASCII Character: "," */
+ buf[off+len] = 0x69; off++; /* ASCII Character: "i" */
+ buf[off+len] = 0x2c; off++; /* ASCII Character: "," */
+ buf[off+len] = 0x30; off++; /* ASCII Character: "0" */
+ buf[off+len] = 0x78; off++; /* ASCII Character: "x" */
+ len += 5;
+ buf[off+len] = pr_reg->pr_reg_isid[0]; off++;
+ buf[off+len] = pr_reg->pr_reg_isid[1]; off++;
+ buf[off+len] = pr_reg->pr_reg_isid[2]; off++;
+ buf[off+len] = pr_reg->pr_reg_isid[3]; off++;
+ buf[off+len] = pr_reg->pr_reg_isid[4]; off++;
+ buf[off+len] = pr_reg->pr_reg_isid[5]; off++;
+ buf[off+len] = '\0'; off++;
+ len += 7;
+ }
+ spin_unlock_irq(&se_nacl->nacl_sess_lock);
+ /*
+ * The ADDITIONAL LENGTH field specifies the number of bytes that follow
+ * in the TransportID. The additional length shall be at least 20 and
+ * shall be a multiple of four.
+ */
+ padding = ((-len) & 3);
+ if (padding != 0)
+ len += padding;
+
+ buf[2] = ((len >> 8) & 0xff);
+ buf[3] = (len & 0xff);
+ /*
+ * Increment value for total payload + header length for
+ * full status descriptor
+ */
+ len += 4;
+
+ return len;
+}
+EXPORT_SYMBOL(iscsi_get_pr_transport_id);
+
+u32 iscsi_get_pr_transport_id_len(
+ struct se_portal_group *se_tpg,
+ struct se_node_acl *se_nacl,
+ struct t10_pr_registration *pr_reg,
+ int *format_code)
+{
+ u32 len = 0, padding = 0;
+
+ spin_lock_irq(&se_nacl->nacl_sess_lock);
+ len = strlen(se_nacl->initiatorname);
+ /*
+ * Add extra byte for NULL terminator
+ */
+ len++;
+ /*
+ * If there is ISID present with the registration, use format code:
+ * 01b: iSCSI Initiator port TransportID format
+ *
+ * If there is not an active iSCSI session, use format code:
+ * 00b: iSCSI Initiator device TransportID format
+ */
+ if (pr_reg->isid_present_at_reg) {
+ len += 5; /* For ",i,0x" ASCII seperator */
+ len += 7; /* For iSCSI Initiator Session ID + Null terminator */
+ *format_code = 1;
+ } else
+ *format_code = 0;
+ spin_unlock_irq(&se_nacl->nacl_sess_lock);
+ /*
+ * The ADDITIONAL LENGTH field specifies the number of bytes that follow
+ * in the TransportID. The additional length shall be at least 20 and
+ * shall be a multiple of four.
+ */
+ padding = ((-len) & 3);
+ if (padding != 0)
+ len += padding;
+ /*
+ * Increment value for total payload + header length for
+ * full status descriptor
+ */
+ len += 4;
+
+ return len;
+}
+EXPORT_SYMBOL(iscsi_get_pr_transport_id_len);
+
+char *iscsi_parse_pr_out_transport_id(
+ struct se_portal_group *se_tpg,
+ const char *buf,
+ u32 *out_tid_len,
+ char **port_nexus_ptr)
+{
+ char *p;
+ u32 tid_len, padding;
+ int i;
+ u16 add_len;
+ u8 format_code = (buf[0] & 0xc0);
+ /*
+ * Check for FORMAT CODE 00b or 01b from spc4r17, section 7.5.4.6:
+ *
+ * TransportID for initiator ports using SCSI over iSCSI,
+ * from Table 388 -- iSCSI TransportID formats.
+ *
+ * 00b Initiator port is identified using the world wide unique
+ * SCSI device name of the iSCSI initiator
+ * device containing the initiator port (see table 389).
+ * 01b Initiator port is identified using the world wide unique
+ * initiator port identifier (see table 390).10b to 11b
+ * Reserved
+ */
+ if ((format_code != 0x00) && (format_code != 0x40)) {
+ printk(KERN_ERR "Illegal format code: 0x%02x for iSCSI"
+ " Initiator Transport ID\n", format_code);
+ return NULL;
+ }
+ /*
+ * If the caller wants the TransportID Length, we set that value for the
+ * entire iSCSI Tarnsport ID now.
+ */
+ if (out_tid_len != NULL) {
+ add_len = ((buf[2] >> 8) & 0xff);
+ add_len |= (buf[3] & 0xff);
+
+ tid_len = strlen((char *)&buf[4]);
+ tid_len += 4; /* Add four bytes for iSCSI Transport ID header */
+ tid_len += 1; /* Add one byte for NULL terminator */
+ padding = ((-tid_len) & 3);
+ if (padding != 0)
+ tid_len += padding;
+
+ if ((add_len + 4) != tid_len) {
+ printk(KERN_INFO "LIO-Target Extracted add_len: %hu "
+ "does not match calculated tid_len: %u,"
+ " using tid_len instead\n", add_len+4, tid_len);
+ *out_tid_len = tid_len;
+ } else
+ *out_tid_len = (add_len + 4);
+ }
+ /*
+ * Check for ',i,0x' seperator between iSCSI Name and iSCSI Initiator
+ * Session ID as defined in Table 390 - iSCSI initiator port TransportID
+ * format.
+ */
+ if (format_code == 0x40) {
+ p = strstr((char *)&buf[4], ",i,0x");
+ if (!(p)) {
+ printk(KERN_ERR "Unable to locate \",i,0x\" seperator"
+ " for Initiator port identifier: %s\n",
+ (char *)&buf[4]);
+ return NULL;
+ }
+ *p = '\0'; /* Terminate iSCSI Name */
+ p += 5; /* Skip over ",i,0x" seperator */
+
+ *port_nexus_ptr = p;
+ /*
+ * Go ahead and do the lower case conversion of the received
+ * 12 ASCII characters representing the ISID in the TransportID
+ * for comparision against the running iSCSI session's ISID from
+ * iscsi_target.c:lio_sess_get_initiator_sid()
+ */
+ for (i = 0; i < 12; i++) {
+ if (isdigit(*p)) {
+ p++;
+ continue;
+ }
+ *p = tolower(*p);
+ p++;
+ }
+ }
+
+ return (char *)&buf[4];
+}
+EXPORT_SYMBOL(iscsi_parse_pr_out_transport_id);
diff --git a/include/target/target_core_fabric_lib.h b/include/target/target_core_fabric_lib.h
new file mode 100644
index 0000000..c2f8d0e
--- /dev/null
+++ b/include/target/target_core_fabric_lib.h
@@ -0,0 +1,28 @@
+#ifndef TARGET_CORE_FABRIC_LIB_H
+#define TARGET_CORE_FABRIC_LIB_H
+
+extern u8 sas_get_fabric_proto_ident(struct se_portal_group *);
+extern u32 sas_get_pr_transport_id(struct se_portal_group *, struct se_node_acl *,
+ struct t10_pr_registration *, int *, unsigned char *);
+extern u32 sas_get_pr_transport_id_len(struct se_portal_group *, struct se_node_acl *,
+ struct t10_pr_registration *, int *);
+extern char *sas_parse_pr_out_transport_id(struct se_portal_group *,
+ const char *, u32 *, char **);
+
+extern u8 fc_get_fabric_proto_ident(struct se_portal_group *);
+extern u32 fc_get_pr_transport_id(struct se_portal_group *, struct se_node_acl *,
+ struct t10_pr_registration *, int *, unsigned char *);
+extern u32 fc_get_pr_transport_id_len(struct se_portal_group *, struct se_node_acl *,
+ struct t10_pr_registration *, int *);
+extern char *fc_parse_pr_out_transport_id(struct se_portal_group *,
+ const char *, u32 *, char **);
+
+extern u8 iscsi_get_fabric_proto_ident(struct se_portal_group *);
+extern u32 iscsi_get_pr_transport_id(struct se_portal_group *, struct se_node_acl *,
+ struct t10_pr_registration *, int *, unsigned char *);
+extern u32 iscsi_get_pr_transport_id_len(struct se_portal_group *, struct se_node_acl *,
+ struct t10_pr_registration *, int *);
+extern char *iscsi_parse_pr_out_transport_id(struct se_portal_group *,
+ const char *, u32 *, char **);
+
+#endif /* TARGET_CORE_FABRIC_LIB_H */
--
1.7.3.4
^ permalink raw reply related [flat|nested] 22+ messages in thread* [PATCH v2 02s/03] target: Add Kbuild and Kconfig for drivers/target and Documentation/target/
2010-12-17 21:11 [PATCH v2 00/03] target: Initial merge of v4.0.0-rc6 for .38 Nicholas A. Bellinger
` (18 preceding siblings ...)
2010-12-17 21:11 ` [PATCH v2 02r/03] target: Add generic ProtoID and TransportID fabric handlers for SAS, FC, and iSCSI Nicholas A. Bellinger
@ 2010-12-17 21:11 ` Nicholas A. Bellinger
2010-12-17 21:11 ` [PATCH v2 03/03] tcm_loop: Add multi-fabric Linux/SCSI LLD fabric module Nicholas A. Bellinger
20 siblings, 0 replies; 22+ messages in thread
From: Nicholas A. Bellinger @ 2010-12-17 21:11 UTC (permalink / raw)
To: linux-scsi, James Bottomley; +Cc: Nicholas Bellinger
From: Nicholas Bellinger <nab@linux-iscsi.org>
Add TCM Kbuild and Kconfig files and update drivers/ to pick up drivers/target.
Add Docmentation/target/ for tcm_mod_builder.py script for generating new
TCM v4 fabric modules functional ConfigFS skeletons.
Signed-off-by: Nicholas A. Bellinger <nab@linux-iscsi.org>
---
Documentation/target/tcm_mod_builder.py | 1094 ++++++++++++++++++++++++++++++
Documentation/target/tcm_mod_builder.txt | 145 ++++
drivers/Kconfig | 2 +
drivers/Makefile | 1 +
drivers/target/Kconfig | 31 +
drivers/target/Makefile | 24 +
6 files changed, 1297 insertions(+), 0 deletions(-)
create mode 100755 Documentation/target/tcm_mod_builder.py
create mode 100644 Documentation/target/tcm_mod_builder.txt
create mode 100644 drivers/target/Kconfig
create mode 100644 drivers/target/Makefile
diff --git a/Documentation/target/tcm_mod_builder.py b/Documentation/target/tcm_mod_builder.py
new file mode 100755
index 0000000..dbeb8a0
--- /dev/null
+++ b/Documentation/target/tcm_mod_builder.py
@@ -0,0 +1,1094 @@
+#!/usr/bin/python
+# The TCM v4 multi-protocol fabric module generation script for drivers/target/$NEW_MOD
+#
+# Copyright (c) 2010 Rising Tide Systems
+# Copyright (c) 2010 Linux-iSCSI.org
+#
+# Author: nab@kernel.org
+#
+import os, sys
+import subprocess as sub
+import string
+import re
+import optparse
+
+tcm_dir = ""
+
+fabric_ops = []
+fabric_mod_dir = ""
+fabric_mod_port = ""
+fabric_mod_init_port = ""
+
+def tcm_mod_err(msg):
+ print msg
+ sys.exit(1)
+
+def tcm_mod_create_module_subdir(fabric_mod_dir_var):
+
+ if os.path.isdir(fabric_mod_dir_var) == True:
+ return 1
+
+ print "Creating fabric_mod_dir: " + fabric_mod_dir_var
+ ret = os.mkdir(fabric_mod_dir_var)
+ if ret:
+ tcm_mod_err("Unable to mkdir " + fabric_mod_dir_var)
+
+ return
+
+def tcm_mod_build_FC_include(fabric_mod_dir_var, fabric_mod_name):
+ global fabric_mod_port
+ global fabric_mod_init_port
+ buf = ""
+
+ f = fabric_mod_dir_var + "/" + fabric_mod_name + "_base.h"
+ print "Writing file: " + f
+
+ p = open(f, 'w');
+ if not p:
+ tcm_mod_err("Unable to open file: " + f)
+
+ buf = "#define " + fabric_mod_name.upper() + "_VERSION \"v0.1\"\n"
+ buf += "#define " + fabric_mod_name.upper() + "_NAMELEN 32\n"
+ buf += "\n"
+ buf += "struct " + fabric_mod_name + "_nacl {\n"
+ buf += " /* Binary World Wide unique Port Name for FC Initiator Nport */\n"
+ buf += " u64 nport_wwpn;\n"
+ buf += " /* ASCII formatted WWPN for FC Initiator Nport */\n"
+ buf += " char nport_name[" + fabric_mod_name.upper() + "_NAMELEN];\n"
+ buf += " /* Returned by " + fabric_mod_name + "_make_nodeacl() */\n"
+ buf += " struct se_node_acl se_node_acl;\n"
+ buf += "};\n"
+ buf += "\n"
+ buf += "struct " + fabric_mod_name + "_tpg {\n"
+ buf += " /* FC lport target portal group tag for TCM */\n"
+ buf += " u16 lport_tpgt;\n"
+ buf += " /* Pointer back to " + fabric_mod_name + "_lport */\n"
+ buf += " struct " + fabric_mod_name + "_lport *lport;\n"
+ buf += " /* Returned by " + fabric_mod_name + "_make_tpg() */\n"
+ buf += " struct se_portal_group se_tpg;\n"
+ buf += "};\n"
+ buf += "\n"
+ buf += "struct " + fabric_mod_name + "_lport {\n"
+ buf += " /* SCSI protocol the lport is providing */\n"
+ buf += " u8 lport_proto_id;\n"
+ buf += " /* Binary World Wide unique Port Name for FC Target Lport */\n"
+ buf += " u64 lport_wwpn;\n"
+ buf += " /* ASCII formatted WWPN for FC Target Lport */\n"
+ buf += " char lport_name[" + fabric_mod_name.upper() + "_NAMELEN];\n"
+ buf += " /* Returned by " + fabric_mod_name + "_make_lport() */\n"
+ buf += " struct se_wwn lport_wwn;\n"
+ buf += "};\n"
+
+ ret = p.write(buf)
+ if ret:
+ tcm_mod_err("Unable to write f: " + f)
+
+ p.close()
+
+ fabric_mod_port = "lport"
+ fabric_mod_init_port = "nport"
+
+ return
+
+def tcm_mod_build_SAS_include(fabric_mod_dir_var, fabric_mod_name):
+ global fabric_mod_port
+ global fabric_mod_init_port
+ buf = ""
+
+ f = fabric_mod_dir_var + "/" + fabric_mod_name + "_base.h"
+ print "Writing file: " + f
+
+ p = open(f, 'w');
+ if not p:
+ tcm_mod_err("Unable to open file: " + f)
+
+ buf = "#define " + fabric_mod_name.upper() + "_VERSION \"v0.1\"\n"
+ buf += "#define " + fabric_mod_name.upper() + "_NAMELEN 32\n"
+ buf += "\n"
+ buf += "struct " + fabric_mod_name + "_nacl {\n"
+ buf += " /* Binary World Wide unique Port Name for SAS Initiator port */\n"
+ buf += " u64 iport_wwpn;\n"
+ buf += " /* ASCII formatted WWPN for Sas Initiator port */\n"
+ buf += " char iport_name[" + fabric_mod_name.upper() + "_NAMELEN];\n"
+ buf += " /* Returned by " + fabric_mod_name + "_make_nodeacl() */\n"
+ buf += " struct se_node_acl se_node_acl;\n"
+ buf += "};\n\n"
+ buf += "struct " + fabric_mod_name + "_tpg {\n"
+ buf += " /* SAS port target portal group tag for TCM */\n"
+ buf += " u16 tport_tpgt;\n"
+ buf += " /* Pointer back to " + fabric_mod_name + "_tport */\n"
+ buf += " struct " + fabric_mod_name + "_tport *tport;\n"
+ buf += " /* Returned by " + fabric_mod_name + "_make_tpg() */\n"
+ buf += " struct se_portal_group se_tpg;\n"
+ buf += "};\n\n"
+ buf += "struct " + fabric_mod_name + "_tport {\n"
+ buf += " /* SCSI protocol the tport is providing */\n"
+ buf += " u8 tport_proto_id;\n"
+ buf += " /* Binary World Wide unique Port Name for SAS Target port */\n"
+ buf += " u64 tport_wwpn;\n"
+ buf += " /* ASCII formatted WWPN for SAS Target port */\n"
+ buf += " char tport_name[" + fabric_mod_name.upper() + "_NAMELEN];\n"
+ buf += " /* Returned by " + fabric_mod_name + "_make_tport() */\n"
+ buf += " struct se_wwn tport_wwn;\n"
+ buf += "};\n"
+
+ ret = p.write(buf)
+ if ret:
+ tcm_mod_err("Unable to write f: " + f)
+
+ p.close()
+
+ fabric_mod_port = "tport"
+ fabric_mod_init_port = "iport"
+
+ return
+
+def tcm_mod_build_iSCSI_include(fabric_mod_dir_var, fabric_mod_name):
+ global fabric_mod_port
+ global fabric_mod_init_port
+ buf = ""
+
+ f = fabric_mod_dir_var + "/" + fabric_mod_name + "_base.h"
+ print "Writing file: " + f
+
+ p = open(f, 'w');
+ if not p:
+ tcm_mod_err("Unable to open file: " + f)
+
+ buf = "#define " + fabric_mod_name.upper() + "_VERSION \"v0.1\"\n"
+ buf += "#define " + fabric_mod_name.upper() + "_NAMELEN 32\n"
+ buf += "\n"
+ buf += "struct " + fabric_mod_name + "_nacl {\n"
+ buf += " /* ASCII formatted InitiatorName */\n"
+ buf += " char iport_name[" + fabric_mod_name.upper() + "_NAMELEN];\n"
+ buf += " /* Returned by " + fabric_mod_name + "_make_nodeacl() */\n"
+ buf += " struct se_node_acl se_node_acl;\n"
+ buf += "};\n\n"
+ buf += "struct " + fabric_mod_name + "_tpg {\n"
+ buf += " /* iSCSI target portal group tag for TCM */\n"
+ buf += " u16 tport_tpgt;\n"
+ buf += " /* Pointer back to " + fabric_mod_name + "_tport */\n"
+ buf += " struct " + fabric_mod_name + "_tport *tport;\n"
+ buf += " /* Returned by " + fabric_mod_name + "_make_tpg() */\n"
+ buf += " struct se_portal_group se_tpg;\n"
+ buf += "};\n\n"
+ buf += "struct " + fabric_mod_name + "_tport {\n"
+ buf += " /* SCSI protocol the tport is providing */\n"
+ buf += " u8 tport_proto_id;\n"
+ buf += " /* ASCII formatted TargetName for IQN */\n"
+ buf += " char tport_name[" + fabric_mod_name.upper() + "_NAMELEN];\n"
+ buf += " /* Returned by " + fabric_mod_name + "_make_tport() */\n"
+ buf += " struct se_wwn tport_wwn;\n"
+ buf += "};\n"
+
+ ret = p.write(buf)
+ if ret:
+ tcm_mod_err("Unable to write f: " + f)
+
+ p.close()
+
+ fabric_mod_port = "tport"
+ fabric_mod_init_port = "iport"
+
+ return
+
+def tcm_mod_build_base_includes(proto_ident, fabric_mod_dir_val, fabric_mod_name):
+
+ if proto_ident == "FC":
+ tcm_mod_build_FC_include(fabric_mod_dir_val, fabric_mod_name)
+ elif proto_ident == "SAS":
+ tcm_mod_build_SAS_include(fabric_mod_dir_val, fabric_mod_name)
+ elif proto_ident == "iSCSI":
+ tcm_mod_build_iSCSI_include(fabric_mod_dir_val, fabric_mod_name)
+ else:
+ print "Unsupported proto_ident: " + proto_ident
+ sys.exit(1)
+
+ return
+
+def tcm_mod_build_configfs(proto_ident, fabric_mod_dir_var, fabric_mod_name):
+ buf = ""
+
+ f = fabric_mod_dir_var + "/" + fabric_mod_name + "_configfs.c"
+ print "Writing file: " + f
+
+ p = open(f, 'w');
+ if not p:
+ tcm_mod_err("Unable to open file: " + f)
+
+ buf = "#include <linux/module.h>\n"
+ buf += "#include <linux/moduleparam.h>\n"
+ buf += "#include <linux/version.h>\n"
+ buf += "#include <generated/utsrelease.h>\n"
+ buf += "#include <linux/utsname.h>\n"
+ buf += "#include <linux/init.h>\n"
+ buf += "#include <linux/slab.h>\n"
+ buf += "#include <linux/kthread.h>\n"
+ buf += "#include <linux/types.h>\n"
+ buf += "#include <linux/string.h>\n"
+ buf += "#include <linux/configfs.h>\n"
+ buf += "#include <linux/ctype.h>\n"
+ buf += "#include <asm/unaligned.h>\n\n"
+ buf += "#include <target/target_core_base.h>\n"
+ buf += "#include <target/target_core_transport.h>\n"
+ buf += "#include <target/target_core_fabric_ops.h>\n"
+ buf += "#include <target/target_core_fabric_configfs.h>\n"
+ buf += "#include <target/target_core_fabric_lib.h>\n"
+ buf += "#include <target/target_core_device.h>\n"
+ buf += "#include <target/target_core_tpg.h>\n"
+ buf += "#include <target/target_core_configfs.h>\n"
+ buf += "#include <target/target_core_base.h>\n"
+ buf += "#include <target/configfs_macros.h>\n\n"
+ buf += "#include <" + fabric_mod_name + "_base.h>\n"
+ buf += "#include <" + fabric_mod_name + "_fabric.h>\n\n"
+
+ buf += "/* Local pointer to allocated TCM configfs fabric module */\n"
+ buf += "struct target_fabric_configfs *" + fabric_mod_name + "_fabric_configfs;\n\n"
+
+ buf += "static struct se_node_acl *" + fabric_mod_name + "_make_nodeacl(\n"
+ buf += " struct se_portal_group *se_tpg,\n"
+ buf += " struct config_group *group,\n"
+ buf += " const char *name)\n"
+ buf += "{\n"
+ buf += " struct se_node_acl *se_nacl, *se_nacl_new;\n"
+ buf += " struct " + fabric_mod_name + "_nacl *nacl;\n"
+
+ if proto_ident == "FC" or proto_ident == "SAS":
+ buf += " u64 wwpn = 0;\n"
+
+ buf += " u32 nexus_depth;\n\n"
+ buf += " /* " + fabric_mod_name + "_parse_wwn(name, &wwpn, 1) < 0)\n"
+ buf += " return ERR_PTR(-EINVAL); */\n"
+ buf += " se_nacl_new = " + fabric_mod_name + "_alloc_fabric_acl(se_tpg);\n"
+ buf += " if (!(se_nacl_new))\n"
+ buf += " return ERR_PTR(-ENOMEM);\n"
+ buf += "//#warning FIXME: Hardcoded nexus depth in " + fabric_mod_name + "_make_nodeacl()\n"
+ buf += " nexus_depth = 1;\n"
+ buf += " /*\n"
+ buf += " * se_nacl_new may be released by core_tpg_add_initiator_node_acl()\n"
+ buf += " * when converting a NodeACL from demo mode -> explict\n"
+ buf += " */\n"
+ buf += " se_nacl = core_tpg_add_initiator_node_acl(se_tpg, se_nacl_new,\n"
+ buf += " name, nexus_depth);\n"
+ buf += " if (IS_ERR(se_nacl)) {\n"
+ buf += " " + fabric_mod_name + "_release_fabric_acl(se_tpg, se_nacl_new);\n"
+ buf += " return se_nacl;\n"
+ buf += " }\n"
+ buf += " /*\n"
+ buf += " * Locate our struct " + fabric_mod_name + "_nacl and set the FC Nport WWPN\n"
+ buf += " */\n"
+ buf += " nacl = container_of(se_nacl, struct " + fabric_mod_name + "_nacl, se_node_acl);\n"
+
+ if proto_ident == "FC" or proto_ident == "SAS":
+ buf += " nacl->" + fabric_mod_init_port + "_wwpn = wwpn;\n"
+
+ buf += " /* " + fabric_mod_name + "_format_wwn(&nacl->" + fabric_mod_init_port + "_name[0], " + fabric_mod_name.upper() + "_NAMELEN, wwpn); */\n\n"
+ buf += " return se_nacl;\n"
+ buf += "}\n\n"
+ buf += "static void " + fabric_mod_name + "_drop_nodeacl(struct se_node_acl *se_acl)\n"
+ buf += "{\n"
+ buf += " struct " + fabric_mod_name + "_nacl *nacl = container_of(se_acl,\n"
+ buf += " struct " + fabric_mod_name + "_nacl, se_node_acl);\n"
+ buf += " kfree(nacl);\n"
+ buf += "}\n\n"
+
+ buf += "static struct se_portal_group *" + fabric_mod_name + "_make_tpg(\n"
+ buf += " struct se_wwn *wwn,\n"
+ buf += " struct config_group *group,\n"
+ buf += " const char *name)\n"
+ buf += "{\n"
+ buf += " struct " + fabric_mod_name + "_" + fabric_mod_port + "*" + fabric_mod_port + " = container_of(wwn,\n"
+ buf += " struct " + fabric_mod_name + "_" + fabric_mod_port + ", " + fabric_mod_port + "_wwn);\n\n"
+ buf += " struct " + fabric_mod_name + "_tpg *tpg;\n"
+ buf += " unsigned long tpgt;\n"
+ buf += " int ret;\n\n"
+ buf += " if (strstr(name, \"tpgt_\") != name)\n"
+ buf += " return ERR_PTR(-EINVAL);\n"
+ buf += " if (strict_strtoul(name + 5, 10, &tpgt) || tpgt > UINT_MAX)\n"
+ buf += " return ERR_PTR(-EINVAL);\n\n"
+ buf += " tpg = kzalloc(sizeof(struct " + fabric_mod_name + "_tpg), GFP_KERNEL);\n"
+ buf += " if (!(tpg)) {\n"
+ buf += " printk(KERN_ERR \"Unable to allocate struct " + fabric_mod_name + "_tpg\");\n"
+ buf += " return ERR_PTR(-ENOMEM);\n"
+ buf += " }\n"
+ buf += " tpg->" + fabric_mod_port + " = " + fabric_mod_port + ";\n"
+ buf += " tpg->" + fabric_mod_port + "_tpgt = tpgt;\n\n"
+ buf += " ret = core_tpg_register(&" + fabric_mod_name + "_fabric_configfs->tf_ops, wwn,\n"
+ buf += " &tpg->se_tpg, (void *)tpg,\n"
+ buf += " TRANSPORT_TPG_TYPE_NORMAL);\n"
+ buf += " if (ret < 0) {\n"
+ buf += " kfree(tpg);\n"
+ buf += " return NULL;\n"
+ buf += " }\n"
+ buf += " return &tpg->se_tpg;\n"
+ buf += "}\n\n"
+ buf += "static void " + fabric_mod_name + "_drop_tpg(struct se_portal_group *se_tpg)\n"
+ buf += "{\n"
+ buf += " struct " + fabric_mod_name + "_tpg *tpg = container_of(se_tpg,\n"
+ buf += " struct " + fabric_mod_name + "_tpg, se_tpg);\n\n"
+ buf += " core_tpg_deregister(se_tpg);\n"
+ buf += " kfree(tpg);\n"
+ buf += "}\n\n"
+
+ buf += "static struct se_wwn *" + fabric_mod_name + "_make_" + fabric_mod_port + "(\n"
+ buf += " struct target_fabric_configfs *tf,\n"
+ buf += " struct config_group *group,\n"
+ buf += " const char *name)\n"
+ buf += "{\n"
+ buf += " struct " + fabric_mod_name + "_" + fabric_mod_port + " *" + fabric_mod_port + ";\n"
+
+ if proto_ident == "FC" or proto_ident == "SAS":
+ buf += " u64 wwpn = 0;\n\n"
+
+ buf += " /* if (" + fabric_mod_name + "_parse_wwn(name, &wwpn, 1) < 0)\n"
+ buf += " return ERR_PTR(-EINVAL); */\n\n"
+ buf += " " + fabric_mod_port + " = kzalloc(sizeof(struct " + fabric_mod_name + "_" + fabric_mod_port + "), GFP_KERNEL);\n"
+ buf += " if (!(" + fabric_mod_port + ")) {\n"
+ buf += " printk(KERN_ERR \"Unable to allocate struct " + fabric_mod_name + "_" + fabric_mod_port + "\");\n"
+ buf += " return ERR_PTR(-ENOMEM);\n"
+ buf += " }\n"
+
+ if proto_ident == "FC" or proto_ident == "SAS":
+ buf += " " + fabric_mod_port + "->" + fabric_mod_port + "_wwpn = wwpn;\n"
+
+ buf += " /* " + fabric_mod_name + "_format_wwn(&" + fabric_mod_port + "->" + fabric_mod_port + "_name[0], " + fabric_mod_name.upper() + "__NAMELEN, wwpn); */\n\n"
+ buf += " return &" + fabric_mod_port + "->" + fabric_mod_port + "_wwn;\n"
+ buf += "}\n\n"
+ buf += "static void " + fabric_mod_name + "_drop_" + fabric_mod_port + "(struct se_wwn *wwn)\n"
+ buf += "{\n"
+ buf += " struct " + fabric_mod_name + "_" + fabric_mod_port + " *" + fabric_mod_port + " = container_of(wwn,\n"
+ buf += " struct " + fabric_mod_name + "_" + fabric_mod_port + ", " + fabric_mod_port + "_wwn);\n"
+ buf += " kfree(" + fabric_mod_port + ");\n"
+ buf += "}\n\n"
+ buf += "static ssize_t " + fabric_mod_name + "_wwn_show_attr_version(\n"
+ buf += " struct target_fabric_configfs *tf,\n"
+ buf += " char *page)\n"
+ buf += "{\n"
+ buf += " return sprintf(page, \"" + fabric_mod_name.upper() + " fabric module %s on %s/%s\"\n"
+ buf += " \"on \"UTS_RELEASE\"\\n\", " + fabric_mod_name.upper() + "_VERSION, utsname()->sysname,\n"
+ buf += " utsname()->machine);\n"
+ buf += "}\n\n"
+ buf += "TF_WWN_ATTR_RO(" + fabric_mod_name + ", version);\n\n"
+ buf += "static struct configfs_attribute *" + fabric_mod_name + "_wwn_attrs[] = {\n"
+ buf += " &" + fabric_mod_name + "_wwn_version.attr,\n"
+ buf += " NULL,\n"
+ buf += "};\n\n"
+
+ buf += "static struct target_core_fabric_ops " + fabric_mod_name + "_ops = {\n"
+ buf += " .get_fabric_name = " + fabric_mod_name + "_get_fabric_name,\n"
+ buf += " .get_fabric_proto_ident = " + fabric_mod_name + "_get_fabric_proto_ident,\n"
+ buf += " .tpg_get_wwn = " + fabric_mod_name + "_get_fabric_wwn,\n"
+ buf += " .tpg_get_tag = " + fabric_mod_name + "_get_tag,\n"
+ buf += " .tpg_get_default_depth = " + fabric_mod_name + "_get_default_depth,\n"
+ buf += " .tpg_get_pr_transport_id = " + fabric_mod_name + "_get_pr_transport_id,\n"
+ buf += " .tpg_get_pr_transport_id_len = " + fabric_mod_name + "_get_pr_transport_id_len,\n"
+ buf += " .tpg_parse_pr_out_transport_id = " + fabric_mod_name + "_parse_pr_out_transport_id,\n"
+ buf += " .tpg_check_demo_mode = " + fabric_mod_name + "_check_false,\n"
+ buf += " .tpg_check_demo_mode_cache = " + fabric_mod_name + "_check_true,\n"
+ buf += " .tpg_check_demo_mode_write_protect = " + fabric_mod_name + "_check_true,\n"
+ buf += " .tpg_check_prod_mode_write_protect = " + fabric_mod_name + "_check_false,\n"
+ buf += " .tpg_alloc_fabric_acl = " + fabric_mod_name + "_alloc_fabric_acl,\n"
+ buf += " .tpg_release_fabric_acl = " + fabric_mod_name + "_release_fabric_acl,\n"
+ buf += " .tpg_get_inst_index = " + fabric_mod_name + "_tpg_get_inst_index,\n"
+ buf += " .release_cmd_to_pool = " + fabric_mod_name + "_release_cmd,\n"
+ buf += " .release_cmd_direct = " + fabric_mod_name + "_release_cmd,\n"
+ buf += " .shutdown_session = " + fabric_mod_name + "_shutdown_session,\n"
+ buf += " .close_session = " + fabric_mod_name + "_close_session,\n"
+ buf += " .stop_session = " + fabric_mod_name + "_stop_session,\n"
+ buf += " .fall_back_to_erl0 = " + fabric_mod_name + "_reset_nexus,\n"
+ buf += " .sess_logged_in = " + fabric_mod_name + "_sess_logged_in,\n"
+ buf += " .sess_get_index = " + fabric_mod_name + "_sess_get_index,\n"
+ buf += " .sess_get_initiator_sid = NULL,\n"
+ buf += " .write_pending = " + fabric_mod_name + "_write_pending,\n"
+ buf += " .write_pending_status = " + fabric_mod_name + "_write_pending_status,\n"
+ buf += " .set_default_node_attributes = " + fabric_mod_name + "_set_default_node_attrs,\n"
+ buf += " .get_task_tag = " + fabric_mod_name + "_get_task_tag,\n"
+ buf += " .get_cmd_state = " + fabric_mod_name + "_get_cmd_state,\n"
+ buf += " .new_cmd_failure = " + fabric_mod_name + "_new_cmd_failure,\n"
+ buf += " .queue_data_in = " + fabric_mod_name + "_queue_data_in,\n"
+ buf += " .queue_status = " + fabric_mod_name + "_queue_status,\n"
+ buf += " .queue_tm_rsp = " + fabric_mod_name + "_queue_tm_rsp,\n"
+ buf += " .get_fabric_sense_len = " + fabric_mod_name + "_get_fabric_sense_len,\n"
+ buf += " .set_fabric_sense_len = " + fabric_mod_name + "_set_fabric_sense_len,\n"
+ buf += " .is_state_remove = " + fabric_mod_name + "_is_state_remove,\n"
+ buf += " .pack_lun = " + fabric_mod_name + "_pack_lun,\n"
+ buf += " /*\n"
+ buf += " * Setup function pointers for generic logic in target_core_fabric_configfs.c\n"
+ buf += " */\n"
+ buf += " .fabric_make_wwn = " + fabric_mod_name + "_make_" + fabric_mod_port + ",\n"
+ buf += " .fabric_drop_wwn = " + fabric_mod_name + "_drop_" + fabric_mod_port + ",\n"
+ buf += " .fabric_make_tpg = " + fabric_mod_name + "_make_tpg,\n"
+ buf += " .fabric_drop_tpg = " + fabric_mod_name + "_drop_tpg,\n"
+ buf += " .fabric_post_link = NULL,\n"
+ buf += " .fabric_pre_unlink = NULL,\n"
+ buf += " .fabric_make_np = NULL,\n"
+ buf += " .fabric_drop_np = NULL,\n"
+ buf += " .fabric_make_nodeacl = " + fabric_mod_name + "_make_nodeacl,\n"
+ buf += " .fabric_drop_nodeacl = " + fabric_mod_name + "_drop_nodeacl,\n"
+ buf += "};\n\n"
+
+ buf += "static int " + fabric_mod_name + "_register_configfs(void)\n"
+ buf += "{\n"
+ buf += " struct target_fabric_configfs *fabric;\n"
+ buf += " int ret;\n\n"
+ buf += " printk(KERN_INFO \"" + fabric_mod_name.upper() + " fabric module %s on %s/%s\"\n"
+ buf += " \" on \"UTS_RELEASE\"\\n\"," + fabric_mod_name.upper() + "_VERSION, utsname()->sysname,\n"
+ buf += " utsname()->machine);\n"
+ buf += " /*\n"
+ buf += " * Register the top level struct config_item_type with TCM core\n"
+ buf += " */\n"
+ buf += " fabric = target_fabric_configfs_init(THIS_MODULE, \"" + fabric_mod_name[4:] + "\");\n"
+ buf += " if (!(fabric)) {\n"
+ buf += " printk(KERN_ERR \"target_fabric_configfs_init() failed\\n\");\n"
+ buf += " return -ENOMEM;\n"
+ buf += " }\n"
+ buf += " /*\n"
+ buf += " * Setup fabric->tf_ops from our local " + fabric_mod_name + "_ops\n"
+ buf += " */\n"
+ buf += " fabric->tf_ops = " + fabric_mod_name + "_ops;\n"
+ buf += " /*\n"
+ buf += " * Setup default attribute lists for various fabric->tf_cit_tmpl\n"
+ buf += " */\n"
+ buf += " TF_CIT_TMPL(fabric)->tfc_wwn_cit.ct_attrs = " + fabric_mod_name + "_wwn_attrs;\n"
+ buf += " TF_CIT_TMPL(fabric)->tfc_tpg_base_cit.ct_attrs = NULL;\n"
+ buf += " TF_CIT_TMPL(fabric)->tfc_tpg_attrib_cit.ct_attrs = NULL;\n"
+ buf += " TF_CIT_TMPL(fabric)->tfc_tpg_param_cit.ct_attrs = NULL;\n"
+ buf += " TF_CIT_TMPL(fabric)->tfc_tpg_np_base_cit.ct_attrs = NULL;\n"
+ buf += " TF_CIT_TMPL(fabric)->tfc_tpg_nacl_base_cit.ct_attrs = NULL;\n"
+ buf += " TF_CIT_TMPL(fabric)->tfc_tpg_nacl_attrib_cit.ct_attrs = NULL;\n"
+ buf += " TF_CIT_TMPL(fabric)->tfc_tpg_nacl_auth_cit.ct_attrs = NULL;\n"
+ buf += " TF_CIT_TMPL(fabric)->tfc_tpg_nacl_param_cit.ct_attrs = NULL;\n"
+ buf += " /*\n"
+ buf += " * Register the fabric for use within TCM\n"
+ buf += " */\n"
+ buf += " ret = target_fabric_configfs_register(fabric);\n"
+ buf += " if (ret < 0) {\n"
+ buf += " printk(KERN_ERR \"target_fabric_configfs_register() failed\"\n"
+ buf += " \" for " + fabric_mod_name.upper() + "\\n\");\n"
+ buf += " return ret;\n"
+ buf += " }\n"
+ buf += " /*\n"
+ buf += " * Setup our local pointer to *fabric\n"
+ buf += " */\n"
+ buf += " " + fabric_mod_name + "_fabric_configfs = fabric;\n"
+ buf += " printk(KERN_INFO \"" + fabric_mod_name.upper() + "[0] - Set fabric -> " + fabric_mod_name + "_fabric_configfs\\n\");\n"
+ buf += " return 0;\n"
+ buf += "};\n\n"
+ buf += "static void " + fabric_mod_name + "_deregister_configfs(void)\n"
+ buf += "{\n"
+ buf += " if (!(" + fabric_mod_name + "_fabric_configfs))\n"
+ buf += " return;\n\n"
+ buf += " target_fabric_configfs_deregister(" + fabric_mod_name + "_fabric_configfs);\n"
+ buf += " " + fabric_mod_name + "_fabric_configfs = NULL;\n"
+ buf += " printk(KERN_INFO \"" + fabric_mod_name.upper() + "[0] - Cleared " + fabric_mod_name + "_fabric_configfs\\n\");\n"
+ buf += "};\n\n"
+
+ buf += "static int __init " + fabric_mod_name + "_init(void)\n"
+ buf += "{\n"
+ buf += " int ret;\n\n"
+ buf += " ret = " + fabric_mod_name + "_register_configfs();\n"
+ buf += " if (ret < 0)\n"
+ buf += " return ret;\n\n"
+ buf += " return 0;\n"
+ buf += "};\n\n"
+ buf += "static void " + fabric_mod_name + "_exit(void)\n"
+ buf += "{\n"
+ buf += " " + fabric_mod_name + "_deregister_configfs();\n"
+ buf += "};\n\n"
+
+ buf += "#ifdef MODULE\n"
+ buf += "MODULE_DESCRIPTION(\"" + fabric_mod_name.upper() + " series fabric driver\");\n"
+ buf += "MODULE_LICENSE(\"GPL\");\n"
+ buf += "module_init(" + fabric_mod_name + "_init);\n"
+ buf += "module_exit(" + fabric_mod_name + "_exit);\n"
+ buf += "#endif\n"
+
+ ret = p.write(buf)
+ if ret:
+ tcm_mod_err("Unable to write f: " + f)
+
+ p.close()
+
+ return
+
+def tcm_mod_scan_fabric_ops(tcm_dir):
+
+ fabric_ops_api = tcm_dir + "include/target/target_core_fabric_ops.h"
+
+ print "Using tcm_mod_scan_fabric_ops: " + fabric_ops_api
+ process_fo = 0;
+
+ p = open(fabric_ops_api, 'r')
+
+ line = p.readline()
+ while line:
+ if process_fo == 0 and re.search('struct target_core_fabric_ops {', line):
+ line = p.readline()
+ continue
+
+ if process_fo == 0:
+ process_fo = 1;
+ line = p.readline()
+ # Search for function pointer
+ if not re.search('\(\*', line):
+ continue
+
+ fabric_ops.append(line.rstrip())
+ continue
+
+ line = p.readline()
+ # Search for function pointer
+ if not re.search('\(\*', line):
+ continue
+
+ fabric_ops.append(line.rstrip())
+
+ p.close()
+ return
+
+def tcm_mod_dump_fabric_ops(proto_ident, fabric_mod_dir_var, fabric_mod_name):
+ buf = ""
+ bufi = ""
+
+ f = fabric_mod_dir_var + "/" + fabric_mod_name + "_fabric.c"
+ print "Writing file: " + f
+
+ p = open(f, 'w')
+ if not p:
+ tcm_mod_err("Unable to open file: " + f)
+
+ fi = fabric_mod_dir_var + "/" + fabric_mod_name + "_fabric.h"
+ print "Writing file: " + fi
+
+ pi = open(fi, 'w')
+ if not pi:
+ tcm_mod_err("Unable to open file: " + fi)
+
+ buf = "#include <linux/slab.h>\n"
+ buf += "#include <linux/kthread.h>\n"
+ buf += "#include <linux/types.h>\n"
+ buf += "#include <linux/list.h>\n"
+ buf += "#include <linux/types.h>\n"
+ buf += "#include <linux/string.h>\n"
+ buf += "#include <linux/ctype.h>\n"
+ buf += "#include <asm/unaligned.h>\n"
+ buf += "#include <scsi/scsi.h>\n"
+ buf += "#include <scsi/scsi_host.h>\n"
+ buf += "#include <scsi/scsi_device.h>\n"
+ buf += "#include <scsi/scsi_cmnd.h>\n"
+ buf += "#include <scsi/libfc.h>\n\n"
+ buf += "#include <target/target_core_base.h>\n"
+ buf += "#include <target/target_core_transport.h>\n"
+ buf += "#include <target/target_core_fabric_ops.h>\n"
+ buf += "#include <target/target_core_fabric_lib.h>\n"
+ buf += "#include <target/target_core_device.h>\n"
+ buf += "#include <target/target_core_tpg.h>\n"
+ buf += "#include <target/target_core_configfs.h>\n"
+ buf += "#include <" + fabric_mod_name + "_base.h>\n"
+ buf += "#include <" + fabric_mod_name + "_fabric.h>\n\n"
+
+ buf += "int " + fabric_mod_name + "_check_true(struct se_portal_group *se_tpg)\n"
+ buf += "{\n"
+ buf += " return 1;\n"
+ buf += "}\n\n"
+ bufi += "int " + fabric_mod_name + "_check_true(struct se_portal_group *);\n"
+
+ buf += "int " + fabric_mod_name + "_check_false(struct se_portal_group *se_tpg)\n"
+ buf += "{\n"
+ buf += " return 0;\n"
+ buf += "}\n\n"
+ bufi += "int " + fabric_mod_name + "_check_false(struct se_portal_group *);\n"
+
+ total_fabric_ops = len(fabric_ops)
+ i = 0
+
+ while i < total_fabric_ops:
+ fo = fabric_ops[i]
+ i += 1
+# print "fabric_ops: " + fo
+
+ if re.search('get_fabric_name', fo):
+ buf += "char *" + fabric_mod_name + "_get_fabric_name(void)\n"
+ buf += "{\n"
+ buf += " return \"" + fabric_mod_name[4:] + "\";\n"
+ buf += "}\n\n"
+ bufi += "char *" + fabric_mod_name + "_get_fabric_name(void);\n"
+ continue
+
+ if re.search('get_fabric_proto_ident', fo):
+ buf += "u8 " + fabric_mod_name + "_get_fabric_proto_ident(struct se_portal_group *se_tpg)\n"
+ buf += "{\n"
+ buf += " struct " + fabric_mod_name + "_tpg *tpg = container_of(se_tpg,\n"
+ buf += " struct " + fabric_mod_name + "_tpg, se_tpg);\n"
+ buf += " struct " + fabric_mod_name + "_" + fabric_mod_port + " *" + fabric_mod_port + " = tpg->" + fabric_mod_port + ";\n"
+ buf += " u8 proto_id;\n\n"
+ buf += " switch (" + fabric_mod_port + "->" + fabric_mod_port + "_proto_id) {\n"
+ if proto_ident == "FC":
+ buf += " case SCSI_PROTOCOL_FCP:\n"
+ buf += " default:\n"
+ buf += " proto_id = fc_get_fabric_proto_ident(se_tpg);\n"
+ buf += " break;\n"
+ elif proto_ident == "SAS":
+ buf += " case SCSI_PROTOCOL_SAS:\n"
+ buf += " default:\n"
+ buf += " proto_id = sas_get_fabric_proto_ident(se_tpg);\n"
+ buf += " break;\n"
+ elif proto_ident == "iSCSI":
+ buf += " case SCSI_PROTOCOL_ISCSI:\n"
+ buf += " default:\n"
+ buf += " proto_id = iscsi_get_fabric_proto_ident(se_tpg);\n"
+ buf += " break;\n"
+
+ buf += " }\n\n"
+ buf += " return proto_id;\n"
+ buf += "}\n\n"
+ bufi += "u8 " + fabric_mod_name + "_get_fabric_proto_ident(struct se_portal_group *);\n"
+
+ if re.search('get_wwn', fo):
+ buf += "char *" + fabric_mod_name + "_get_fabric_wwn(struct se_portal_group *se_tpg)\n"
+ buf += "{\n"
+ buf += " struct " + fabric_mod_name + "_tpg *tpg = container_of(se_tpg,\n"
+ buf += " struct " + fabric_mod_name + "_tpg, se_tpg);\n"
+ buf += " struct " + fabric_mod_name + "_" + fabric_mod_port + " *" + fabric_mod_port + " = tpg->" + fabric_mod_port + ";\n\n"
+ buf += " return &" + fabric_mod_port + "->" + fabric_mod_port + "_name[0];\n"
+ buf += "}\n\n"
+ bufi += "char *" + fabric_mod_name + "_get_fabric_wwn(struct se_portal_group *);\n"
+
+ if re.search('get_tag', fo):
+ buf += "u16 " + fabric_mod_name + "_get_tag(struct se_portal_group *se_tpg)\n"
+ buf += "{\n"
+ buf += " struct " + fabric_mod_name + "_tpg *tpg = container_of(se_tpg,\n"
+ buf += " struct " + fabric_mod_name + "_tpg, se_tpg);\n"
+ buf += " return tpg->" + fabric_mod_port + "_tpgt;\n"
+ buf += "}\n\n"
+ bufi += "u16 " + fabric_mod_name + "_get_tag(struct se_portal_group *);\n"
+
+ if re.search('get_default_depth', fo):
+ buf += "u32 " + fabric_mod_name + "_get_default_depth(struct se_portal_group *se_tpg)\n"
+ buf += "{\n"
+ buf += " return 1;\n"
+ buf += "}\n\n"
+ bufi += "u32 " + fabric_mod_name + "_get_default_depth(struct se_portal_group *);\n"
+
+ if re.search('get_pr_transport_id\)\(', fo):
+ buf += "u32 " + fabric_mod_name + "_get_pr_transport_id(\n"
+ buf += " struct se_portal_group *se_tpg,\n"
+ buf += " struct se_node_acl *se_nacl,\n"
+ buf += " struct t10_pr_registration *pr_reg,\n"
+ buf += " int *format_code,\n"
+ buf += " unsigned char *buf)\n"
+ buf += "{\n"
+ buf += " struct " + fabric_mod_name + "_tpg *tpg = container_of(se_tpg,\n"
+ buf += " struct " + fabric_mod_name + "_tpg, se_tpg);\n"
+ buf += " struct " + fabric_mod_name + "_" + fabric_mod_port + " *" + fabric_mod_port + " = tpg->" + fabric_mod_port + ";\n"
+ buf += " int ret = 0;\n\n"
+ buf += " switch (" + fabric_mod_port + "->" + fabric_mod_port + "_proto_id) {\n"
+ if proto_ident == "FC":
+ buf += " case SCSI_PROTOCOL_FCP:\n"
+ buf += " default:\n"
+ buf += " ret = fc_get_pr_transport_id(se_tpg, se_nacl, pr_reg,\n"
+ buf += " format_code, buf);\n"
+ buf += " break;\n"
+ elif proto_ident == "SAS":
+ buf += " case SCSI_PROTOCOL_SAS:\n"
+ buf += " default:\n"
+ buf += " ret = sas_get_pr_transport_id(se_tpg, se_nacl, pr_reg,\n"
+ buf += " format_code, buf);\n"
+ buf += " break;\n"
+ elif proto_ident == "iSCSI":
+ buf += " case SCSI_PROTOCOL_ISCSI:\n"
+ buf += " default:\n"
+ buf += " ret = iscsi_get_pr_transport_id(se_tpg, se_nacl, pr_reg,\n"
+ buf += " format_code, buf);\n"
+ buf += " break;\n"
+
+ buf += " }\n\n"
+ buf += " return ret;\n"
+ buf += "}\n\n"
+ bufi += "u32 " + fabric_mod_name + "_get_pr_transport_id(struct se_portal_group *,\n"
+ bufi += " struct se_node_acl *, struct t10_pr_registration *,\n"
+ bufi += " int *, unsigned char *);\n"
+
+ if re.search('get_pr_transport_id_len\)\(', fo):
+ buf += "u32 " + fabric_mod_name + "_get_pr_transport_id_len(\n"
+ buf += " struct se_portal_group *se_tpg,\n"
+ buf += " struct se_node_acl *se_nacl,\n"
+ buf += " struct t10_pr_registration *pr_reg,\n"
+ buf += " int *format_code)\n"
+ buf += "{\n"
+ buf += " struct " + fabric_mod_name + "_tpg *tpg = container_of(se_tpg,\n"
+ buf += " struct " + fabric_mod_name + "_tpg, se_tpg);\n"
+ buf += " struct " + fabric_mod_name + "_" + fabric_mod_port + " *" + fabric_mod_port + " = tpg->" + fabric_mod_port + ";\n"
+ buf += " int ret = 0;\n\n"
+ buf += " switch (" + fabric_mod_port + "->" + fabric_mod_port + "_proto_id) {\n"
+ if proto_ident == "FC":
+ buf += " case SCSI_PROTOCOL_FCP:\n"
+ buf += " default:\n"
+ buf += " ret = fc_get_pr_transport_id_len(se_tpg, se_nacl, pr_reg,\n"
+ buf += " format_code);\n"
+ buf += " break;\n"
+ elif proto_ident == "SAS":
+ buf += " case SCSI_PROTOCOL_SAS:\n"
+ buf += " default:\n"
+ buf += " ret = sas_get_pr_transport_id_len(se_tpg, se_nacl, pr_reg,\n"
+ buf += " format_code);\n"
+ buf += " break;\n"
+ elif proto_ident == "iSCSI":
+ buf += " case SCSI_PROTOCOL_ISCSI:\n"
+ buf += " default:\n"
+ buf += " ret = iscsi_get_pr_transport_id_len(se_tpg, se_nacl, pr_reg,\n"
+ buf += " format_code);\n"
+ buf += " break;\n"
+
+
+ buf += " }\n\n"
+ buf += " return ret;\n"
+ buf += "}\n\n"
+ bufi += "u32 " + fabric_mod_name + "_get_pr_transport_id_len(struct se_portal_group *,\n"
+ bufi += " struct se_node_acl *, struct t10_pr_registration *,\n"
+ bufi += " int *);\n"
+
+ if re.search('parse_pr_out_transport_id\)\(', fo):
+ buf += "char *" + fabric_mod_name + "_parse_pr_out_transport_id(\n"
+ buf += " struct se_portal_group *se_tpg,\n"
+ buf += " const char *buf,\n"
+ buf += " u32 *out_tid_len,\n"
+ buf += " char **port_nexus_ptr)\n"
+ buf += "{\n"
+ buf += " struct " + fabric_mod_name + "_tpg *tpg = container_of(se_tpg,\n"
+ buf += " struct " + fabric_mod_name + "_tpg, se_tpg);\n"
+ buf += " struct " + fabric_mod_name + "_" + fabric_mod_port + " *" + fabric_mod_port + " = tpg->" + fabric_mod_port + ";\n"
+ buf += " char *tid = NULL;\n\n"
+ buf += " switch (" + fabric_mod_port + "->" + fabric_mod_port + "_proto_id) {\n"
+ if proto_ident == "FC":
+ buf += " case SCSI_PROTOCOL_FCP:\n"
+ buf += " default:\n"
+ buf += " tid = fc_parse_pr_out_transport_id(se_tpg, buf, out_tid_len,\n"
+ buf += " port_nexus_ptr);\n"
+ elif proto_ident == "SAS":
+ buf += " case SCSI_PROTOCOL_SAS:\n"
+ buf += " default:\n"
+ buf += " tid = sas_parse_pr_out_transport_id(se_tpg, buf, out_tid_len,\n"
+ buf += " port_nexus_ptr);\n"
+ elif proto_ident == "iSCSI":
+ buf += " case SCSI_PROTOCOL_ISCSI:\n"
+ buf += " default:\n"
+ buf += " tid = iscsi_parse_pr_out_transport_id(se_tpg, buf, out_tid_len,\n"
+ buf += " port_nexus_ptr);\n"
+
+ buf += " }\n\n"
+ buf += " return tid;\n"
+ buf += "}\n\n"
+ bufi += "char *" + fabric_mod_name + "_parse_pr_out_transport_id(struct se_portal_group *,\n"
+ bufi += " const char *, u32 *, char **);\n"
+
+ if re.search('alloc_fabric_acl\)\(', fo):
+ buf += "struct se_node_acl *" + fabric_mod_name + "_alloc_fabric_acl(struct se_portal_group *se_tpg)\n"
+ buf += "{\n"
+ buf += " struct " + fabric_mod_name + "_nacl *nacl;\n\n"
+ buf += " nacl = kzalloc(sizeof(struct " + fabric_mod_name + "_nacl), GFP_KERNEL);\n"
+ buf += " if (!(nacl)) {\n"
+ buf += " printk(KERN_ERR \"Unable to alocate struct " + fabric_mod_name + "_nacl\\n\");\n"
+ buf += " return NULL;\n"
+ buf += " }\n\n"
+ buf += " return &nacl->se_node_acl;\n"
+ buf += "}\n\n"
+ bufi += "struct se_node_acl *" + fabric_mod_name + "_alloc_fabric_acl(struct se_portal_group *);\n"
+
+ if re.search('release_fabric_acl\)\(', fo):
+ buf += "void " + fabric_mod_name + "_release_fabric_acl(\n"
+ buf += " struct se_portal_group *se_tpg,\n"
+ buf += " struct se_node_acl *se_nacl)\n"
+ buf += "{\n"
+ buf += " struct " + fabric_mod_name + "_nacl *nacl = container_of(se_nacl,\n"
+ buf += " struct " + fabric_mod_name + "_nacl, se_node_acl);\n"
+ buf += " kfree(nacl);\n"
+ buf += "}\n\n"
+ bufi += "void " + fabric_mod_name + "_release_fabric_acl(struct se_portal_group *,\n"
+ bufi += " struct se_node_acl *);\n"
+
+ if re.search('tpg_get_inst_index\)\(', fo):
+ buf += "u32 " + fabric_mod_name + "_tpg_get_inst_index(struct se_portal_group *se_tpg)\n"
+ buf += "{\n"
+ buf += " return 1;\n"
+ buf += "}\n\n"
+ bufi += "u32 " + fabric_mod_name + "_tpg_get_inst_index(struct se_portal_group *);\n"
+
+ if re.search('release_cmd_to_pool', fo):
+ buf += "void " + fabric_mod_name + "_release_cmd(struct se_cmd *se_cmd)\n"
+ buf += "{\n"
+ buf += " return;\n"
+ buf += "}\n\n"
+ bufi += "void " + fabric_mod_name + "_release_cmd(struct se_cmd *);\n"
+
+ if re.search('shutdown_session\)\(', fo):
+ buf += "int " + fabric_mod_name + "_shutdown_session(struct se_session *se_sess)\n"
+ buf += "{\n"
+ buf += " return 0;\n"
+ buf += "}\n\n"
+ bufi += "int " + fabric_mod_name + "_shutdown_session(struct se_session *);\n"
+
+ if re.search('close_session\)\(', fo):
+ buf += "void " + fabric_mod_name + "_close_session(struct se_session *se_sess)\n"
+ buf += "{\n"
+ buf += " return;\n"
+ buf += "}\n\n"
+ bufi += "void " + fabric_mod_name + "_close_session(struct se_session *);\n"
+
+ if re.search('stop_session\)\(', fo):
+ buf += "void " + fabric_mod_name + "_stop_session(struct se_session *se_sess, int sess_sleep , int conn_sleep)\n"
+ buf += "{\n"
+ buf += " return;\n"
+ buf += "}\n\n"
+ bufi += "void " + fabric_mod_name + "_stop_session(struct se_session *, int, int);\n"
+
+ if re.search('fall_back_to_erl0\)\(', fo):
+ buf += "void " + fabric_mod_name + "_reset_nexus(struct se_session *se_sess)\n"
+ buf += "{\n"
+ buf += " return;\n"
+ buf += "}\n\n"
+ bufi += "void " + fabric_mod_name + "_reset_nexus(struct se_session *);\n"
+
+ if re.search('sess_logged_in\)\(', fo):
+ buf += "int " + fabric_mod_name + "_sess_logged_in(struct se_session *se_sess)\n"
+ buf += "{\n"
+ buf += " return 0;\n"
+ buf += "}\n\n"
+ bufi += "int " + fabric_mod_name + "_sess_logged_in(struct se_session *);\n"
+
+ if re.search('sess_get_index\)\(', fo):
+ buf += "u32 " + fabric_mod_name + "_sess_get_index(struct se_session *se_sess)\n"
+ buf += "{\n"
+ buf += " return 0;\n"
+ buf += "}\n\n"
+ bufi += "u32 " + fabric_mod_name + "_sess_get_index(struct se_session *);\n"
+
+ if re.search('write_pending\)\(', fo):
+ buf += "int " + fabric_mod_name + "_write_pending(struct se_cmd *se_cmd)\n"
+ buf += "{\n"
+ buf += " return 0;\n"
+ buf += "}\n\n"
+ bufi += "int " + fabric_mod_name + "_write_pending(struct se_cmd *);\n"
+
+ if re.search('write_pending_status\)\(', fo):
+ buf += "int " + fabric_mod_name + "_write_pending_status(struct se_cmd *se_cmd)\n"
+ buf += "{\n"
+ buf += " return 0;\n"
+ buf += "}\n\n"
+ bufi += "int " + fabric_mod_name + "_write_pending_status(struct se_cmd *);\n"
+
+ if re.search('set_default_node_attributes\)\(', fo):
+ buf += "void " + fabric_mod_name + "_set_default_node_attrs(struct se_node_acl *nacl)\n"
+ buf += "{\n"
+ buf += " return;\n"
+ buf += "}\n\n"
+ bufi += "void " + fabric_mod_name + "_set_default_node_attrs(struct se_node_acl *);\n"
+
+ if re.search('get_task_tag\)\(', fo):
+ buf += "u32 " + fabric_mod_name + "_get_task_tag(struct se_cmd *se_cmd)\n"
+ buf += "{\n"
+ buf += " return 0;\n"
+ buf += "}\n\n"
+ bufi += "u32 " + fabric_mod_name + "_get_task_tag(struct se_cmd *);\n"
+
+ if re.search('get_cmd_state\)\(', fo):
+ buf += "int " + fabric_mod_name + "_get_cmd_state(struct se_cmd *se_cmd)\n"
+ buf += "{\n"
+ buf += " return 0;\n"
+ buf += "}\n\n"
+ bufi += "int " + fabric_mod_name + "_get_cmd_state(struct se_cmd *);\n"
+
+ if re.search('new_cmd_failure\)\(', fo):
+ buf += "void " + fabric_mod_name + "_new_cmd_failure(struct se_cmd *se_cmd)\n"
+ buf += "{\n"
+ buf += " return;\n"
+ buf += "}\n\n"
+ bufi += "void " + fabric_mod_name + "_new_cmd_failure(struct se_cmd *);\n"
+
+ if re.search('queue_data_in\)\(', fo):
+ buf += "int " + fabric_mod_name + "_queue_data_in(struct se_cmd *se_cmd)\n"
+ buf += "{\n"
+ buf += " return 0;\n"
+ buf += "}\n\n"
+ bufi += "int " + fabric_mod_name + "_queue_data_in(struct se_cmd *);\n"
+
+ if re.search('queue_status\)\(', fo):
+ buf += "int " + fabric_mod_name + "_queue_status(struct se_cmd *se_cmd)\n"
+ buf += "{\n"
+ buf += " return 0;\n"
+ buf += "}\n\n"
+ bufi += "int " + fabric_mod_name + "_queue_status(struct se_cmd *);\n"
+
+ if re.search('queue_tm_rsp\)\(', fo):
+ buf += "int " + fabric_mod_name + "_queue_tm_rsp(struct se_cmd *se_cmd)\n"
+ buf += "{\n"
+ buf += " return 0;\n"
+ buf += "}\n\n"
+ bufi += "int " + fabric_mod_name + "_queue_tm_rsp(struct se_cmd *);\n"
+
+ if re.search('get_fabric_sense_len\)\(', fo):
+ buf += "u16 " + fabric_mod_name + "_get_fabric_sense_len(void)\n"
+ buf += "{\n"
+ buf += " return 0;\n"
+ buf += "}\n\n"
+ bufi += "u16 " + fabric_mod_name + "_get_fabric_sense_len(void);\n"
+
+ if re.search('set_fabric_sense_len\)\(', fo):
+ buf += "u16 " + fabric_mod_name + "_set_fabric_sense_len(struct se_cmd *se_cmd, u32 sense_length)\n"
+ buf += "{\n"
+ buf += " return 0;\n"
+ buf += "}\n\n"
+ bufi += "u16 " + fabric_mod_name + "_set_fabric_sense_len(struct se_cmd *, u32);\n"
+
+ if re.search('is_state_remove\)\(', fo):
+ buf += "int " + fabric_mod_name + "_is_state_remove(struct se_cmd *se_cmd)\n"
+ buf += "{\n"
+ buf += " return 0;\n"
+ buf += "}\n\n"
+ bufi += "int " + fabric_mod_name + "_is_state_remove(struct se_cmd *);\n"
+
+ if re.search('pack_lun\)\(', fo):
+ buf += "u64 " + fabric_mod_name + "_pack_lun(unsigned int lun)\n"
+ buf += "{\n"
+ buf += " WARN_ON(lun >= 256);\n"
+ buf += " /* Caller wants this byte-swapped */\n"
+ buf += " return cpu_to_le64((lun & 0xff) << 8);\n"
+ buf += "}\n\n"
+ bufi += "u64 " + fabric_mod_name + "_pack_lun(unsigned int);\n"
+
+
+ ret = p.write(buf)
+ if ret:
+ tcm_mod_err("Unable to write f: " + f)
+
+ p.close()
+
+ ret = pi.write(bufi)
+ if ret:
+ tcm_mod_err("Unable to write fi: " + fi)
+
+ pi.close()
+ return
+
+def tcm_mod_build_kbuild(fabric_mod_dir_var, fabric_mod_name):
+
+ buf = ""
+ f = fabric_mod_dir_var + "/Kbuild"
+ print "Writing file: " + f
+
+ p = open(f, 'w')
+ if not p:
+ tcm_mod_err("Unable to open file: " + f)
+
+ buf = "EXTRA_CFLAGS += -I$(srctree)/drivers/target/ -I$(srctree)/include/ -I$(srctree)/drivers/scsi/ -I$(srctree)/include/scsi/ -I$(srctree)/drivers/target/" + fabric_mod_name + "\n\n"
+ buf += fabric_mod_name + "-objs := " + fabric_mod_name + "_fabric.o \\\n"
+ buf += " " + fabric_mod_name + "_configfs.o\n"
+ buf += "obj-$(CONFIG_" + fabric_mod_name.upper() + ") += " + fabric_mod_name + ".o\n"
+
+ ret = p.write(buf)
+ if ret:
+ tcm_mod_err("Unable to write f: " + f)
+
+ p.close()
+ return
+
+def tcm_mod_build_kconfig(fabric_mod_dir_var, fabric_mod_name):
+
+ buf = ""
+ f = fabric_mod_dir_var + "/Kconfig"
+ print "Writing file: " + f
+
+ p = open(f, 'w')
+ if not p:
+ tcm_mod_err("Unable to open file: " + f)
+
+ buf = "config " + fabric_mod_name.upper() + "\n"
+ buf += " tristate \"" + fabric_mod_name.upper() + " fabric module\"\n"
+ buf += " depends on TARGET_CORE && CONFIGFS_FS\n"
+ buf += " default n\n"
+ buf += " ---help---\n"
+ buf += " Say Y here to enable the " + fabric_mod_name.upper() + " fabric module\n"
+
+ ret = p.write(buf)
+ if ret:
+ tcm_mod_err("Unable to write f: " + f)
+
+ p.close()
+ return
+
+def tcm_mod_add_kbuild(tcm_dir, fabric_mod_name):
+ buf = "obj-$(CONFIG_" + fabric_mod_name.upper() + ") += " + fabric_mod_name.lower() + "/\n"
+ kbuild = tcm_dir + "/drivers/target/Kbuild"
+
+ f = open(kbuild, 'a')
+ f.write(buf)
+ f.close()
+ return
+
+def tcm_mod_add_kconfig(tcm_dir, fabric_mod_name):
+ buf = "source \"drivers/target/" + fabric_mod_name.lower() + "/Kconfig\"\n"
+ kconfig = tcm_dir + "/drivers/target/Kconfig"
+
+ f = open(kconfig, 'a')
+ f.write(buf)
+ f.close()
+ return
+
+def main(modname, proto_ident):
+# proto_ident = "FC"
+# proto_ident = "SAS"
+# proto_ident = "iSCSI"
+
+ tcm_dir = os.getcwd();
+ tcm_dir += "/../../"
+ print "tcm_dir: " + tcm_dir
+ fabric_mod_name = modname
+ fabric_mod_dir = tcm_dir + "drivers/target/" + fabric_mod_name
+ print "Set fabric_mod_name: " + fabric_mod_name
+ print "Set fabric_mod_dir: " + fabric_mod_dir
+ print "Using proto_ident: " + proto_ident
+
+ if proto_ident != "FC" and proto_ident != "SAS" and proto_ident != "iSCSI":
+ print "Unsupported proto_ident: " + proto_ident
+ sys.exit(1)
+
+ ret = tcm_mod_create_module_subdir(fabric_mod_dir)
+ if ret:
+ print "tcm_mod_create_module_subdir() failed because module already exists!"
+ sys.exit(1)
+
+ tcm_mod_build_base_includes(proto_ident, fabric_mod_dir, fabric_mod_name)
+ tcm_mod_scan_fabric_ops(tcm_dir)
+ tcm_mod_dump_fabric_ops(proto_ident, fabric_mod_dir, fabric_mod_name)
+ tcm_mod_build_configfs(proto_ident, fabric_mod_dir, fabric_mod_name)
+ tcm_mod_build_kbuild(fabric_mod_dir, fabric_mod_name)
+ tcm_mod_build_kconfig(fabric_mod_dir, fabric_mod_name)
+
+ input = raw_input("Would you like to add " + fabric_mod_name + "to drivers/target/Kbuild..? [yes,no]: ")
+ if input == "yes" or input == "y":
+ tcm_mod_add_kbuild(tcm_dir, fabric_mod_name)
+
+ input = raw_input("Would you like to add " + fabric_mod_name + "to drivers/target/Kconfig..? [yes,no]: ")
+ if input == "yes" or input == "y":
+ tcm_mod_add_kconfig(tcm_dir, fabric_mod_name)
+
+ return
+
+parser = optparse.OptionParser()
+parser.add_option('-m', '--modulename', help='Module name', dest='modname',
+ action='store', nargs=1, type='string')
+parser.add_option('-p', '--protoident', help='Protocol Ident', dest='protoident',
+ action='store', nargs=1, type='string')
+
+(opts, args) = parser.parse_args()
+
+mandatories = ['modname', 'protoident']
+for m in mandatories:
+ if not opts.__dict__[m]:
+ print "mandatory option is missing\n"
+ parser.print_help()
+ exit(-1)
+
+if __name__ == "__main__":
+
+ main(str(opts.modname), opts.protoident)
diff --git a/Documentation/target/tcm_mod_builder.txt b/Documentation/target/tcm_mod_builder.txt
new file mode 100644
index 0000000..84533d8
--- /dev/null
+++ b/Documentation/target/tcm_mod_builder.txt
@@ -0,0 +1,145 @@
+>>>>>>>>>> The TCM v4 fabric module script generator <<<<<<<<<<
+
+Greetings all,
+
+This document is intended to be a mini-HOWTO for using the tcm_mod_builder.py
+script to generate a brand new functional TCM v4 fabric .ko module of your very own,
+that once built can be immediately be loaded to start access the new TCM/ConfigFS
+fabric skeleton, by simply using:
+
+ modprobe $TCM_NEW_MOD
+ mkdir -p /sys/kernel/config/target/$TCM_NEW_MOD
+
+This script will create a new drivers/target/$TCM_NEW_MOD/, and will do the following
+
+ *) Generate new API callers for drivers/target/target_core_fabric_configs.c logic
+ ->make_nodeacl(), ->drop_nodeacl(), ->make_tpg(), ->drop_tpg()
+ ->make_wwn(), ->drop_wwn(). These are created into $TCM_NEW_MOD/$TCM_NEW_MOD_configfs.c
+ *) Generate basic infrastructure for loading/unloading LKMs and TCM/ConfigFS fabric module
+ using a skeleton struct target_core_fabric_ops API template.
+ *) Based on user defined T10 Proto_Ident for the new fabric module being built,
+ the TransportID / Initiator and Target WWPN related handlers for
+ SPC-3 persistent reservation are automatically generated in $TCM_NEW_MOD/$TCM_NEW_MOD_fabric.c
+ using drivers/target/target_core_fabric_lib.c logic.
+ *) NOP API calls for all other Data I/O path and fabric dependent attribute logic
+ in $TCM_NEW_MOD/$TCM_NEW_MOD_fabric.c
+
+tcm_mod_builder.py depends upon the mandatory '-p $PROTO_IDENT' and '-m
+$FABRIC_MOD_name' parameters, and actually running the script looks like:
+
+target:/mnt/sdb/lio-core-2.6.git/Documentation/target# python tcm_mod_builder.py -p iSCSI -m tcm_nab5000
+tcm_dir: /mnt/sdb/lio-core-2.6.git/Documentation/target/../../
+Set fabric_mod_name: tcm_nab5000
+Set fabric_mod_dir:
+/mnt/sdb/lio-core-2.6.git/Documentation/target/../../drivers/target/tcm_nab5000
+Using proto_ident: iSCSI
+Creating fabric_mod_dir:
+/mnt/sdb/lio-core-2.6.git/Documentation/target/../../drivers/target/tcm_nab5000
+Writing file:
+/mnt/sdb/lio-core-2.6.git/Documentation/target/../../drivers/target/tcm_nab5000/tcm_nab5000_base.h
+Using tcm_mod_scan_fabric_ops:
+/mnt/sdb/lio-core-2.6.git/Documentation/target/../../include/target/target_core_fabric_ops.h
+Writing file:
+/mnt/sdb/lio-core-2.6.git/Documentation/target/../../drivers/target/tcm_nab5000/tcm_nab5000_fabric.c
+Writing file:
+/mnt/sdb/lio-core-2.6.git/Documentation/target/../../drivers/target/tcm_nab5000/tcm_nab5000_fabric.h
+Writing file:
+/mnt/sdb/lio-core-2.6.git/Documentation/target/../../drivers/target/tcm_nab5000/tcm_nab5000_configfs.c
+Writing file:
+/mnt/sdb/lio-core-2.6.git/Documentation/target/../../drivers/target/tcm_nab5000/Kbuild
+Writing file:
+/mnt/sdb/lio-core-2.6.git/Documentation/target/../../drivers/target/tcm_nab5000/Kconfig
+Would you like to add tcm_nab5000to drivers/target/Kbuild..? [yes,no]: yes
+Would you like to add tcm_nab5000to drivers/target/Kconfig..? [yes,no]: yes
+
+At the end of tcm_mod_builder.py. the script will ask to add the following
+line to drivers/target/Kbuild:
+
+ obj-$(CONFIG_TCM_NAB5000) += tcm_nab5000/
+
+and the same for drivers/target/Kconfig:
+
+ source "drivers/target/tcm_nab5000/Kconfig"
+
+*) Run 'make menuconfig' and select the new CONFIG_TCM_NAB5000 item:
+
+ <M> TCM_NAB5000 fabric module
+
+*) Build using 'make modules', once completed you will have:
+
+target:/mnt/sdb/lio-core-2.6.git# ls -la drivers/target/tcm_nab5000/
+total 1348
+drwxr-xr-x 2 root root 4096 2010-10-05 03:23 .
+drwxr-xr-x 9 root root 4096 2010-10-05 03:22 ..
+-rw-r--r-- 1 root root 282 2010-10-05 03:22 Kbuild
+-rw-r--r-- 1 root root 171 2010-10-05 03:22 Kconfig
+-rw-r--r-- 1 root root 49 2010-10-05 03:23 modules.order
+-rw-r--r-- 1 root root 738 2010-10-05 03:22 tcm_nab5000_base.h
+-rw-r--r-- 1 root root 9096 2010-10-05 03:22 tcm_nab5000_configfs.c
+-rw-r--r-- 1 root root 191200 2010-10-05 03:23 tcm_nab5000_configfs.o
+-rw-r--r-- 1 root root 40504 2010-10-05 03:23 .tcm_nab5000_configfs.o.cmd
+-rw-r--r-- 1 root root 5414 2010-10-05 03:22 tcm_nab5000_fabric.c
+-rw-r--r-- 1 root root 2016 2010-10-05 03:22 tcm_nab5000_fabric.h
+-rw-r--r-- 1 root root 190932 2010-10-05 03:23 tcm_nab5000_fabric.o
+-rw-r--r-- 1 root root 40713 2010-10-05 03:23 .tcm_nab5000_fabric.o.cmd
+-rw-r--r-- 1 root root 401861 2010-10-05 03:23 tcm_nab5000.ko
+-rw-r--r-- 1 root root 265 2010-10-05 03:23 .tcm_nab5000.ko.cmd
+-rw-r--r-- 1 root root 459 2010-10-05 03:23 tcm_nab5000.mod.c
+-rw-r--r-- 1 root root 23896 2010-10-05 03:23 tcm_nab5000.mod.o
+-rw-r--r-- 1 root root 22655 2010-10-05 03:23 .tcm_nab5000.mod.o.cmd
+-rw-r--r-- 1 root root 379022 2010-10-05 03:23 tcm_nab5000.o
+-rw-r--r-- 1 root root 211 2010-10-05 03:23 .tcm_nab5000.o.cmd
+
+*) Load the new module, create a lun_0 configfs group, and add new TCM Core
+ IBLOCK backstore symlink to port:
+
+target:/mnt/sdb/lio-core-2.6.git# insmod drivers/target/tcm_nab5000.ko
+target:/mnt/sdb/lio-core-2.6.git# mkdir -p /sys/kernel/config/target/nab5000/iqn.foo/tpgt_1/lun/lun_0
+target:/mnt/sdb/lio-core-2.6.git# cd /sys/kernel/config/target/nab5000/iqn.foo/tpgt_1/lun/lun_0/
+target:/sys/kernel/config/target/nab5000/iqn.foo/tpgt_1/lun/lun_0# ln -s /sys/kernel/config/target/core/iblock_0/lvm_test0 nab5000_port
+
+target:/sys/kernel/config/target/nab5000/iqn.foo/tpgt_1/lun/lun_0# cd -
+target:/mnt/sdb/lio-core-2.6.git# tree /sys/kernel/config/target/nab5000/
+/sys/kernel/config/target/nab5000/
+|-- discovery_auth
+|-- iqn.foo
+| `-- tpgt_1
+| |-- acls
+| |-- attrib
+| |-- lun
+| | `-- lun_0
+| | |-- alua_tg_pt_gp
+| | |-- alua_tg_pt_offline
+| | |-- alua_tg_pt_status
+| | |-- alua_tg_pt_write_md
+| | `-- nab5000_port -> ../../../../../../target/core/iblock_0/lvm_test0
+| |-- np
+| `-- param
+`-- version
+
+target:/mnt/sdb/lio-core-2.6.git# lsmod
+Module Size Used by
+tcm_nab5000 3935 4
+iscsi_target_mod 193211 0
+target_core_stgt 8090 0
+target_core_pscsi 11122 1
+target_core_file 9172 2
+target_core_iblock 9280 1
+target_core_mod 228575 31
+tcm_nab5000,iscsi_target_mod,target_core_stgt,target_core_pscsi,target_core_file,target_core_iblock
+libfc 73681 0
+scsi_debug 56265 0
+scsi_tgt 8666 1 target_core_stgt
+configfs 20644 2 target_core_mod
+
+----------------------------------------------------------------------
+
+Future TODO items:
+
+ *) Add more T10 proto_idents
+ *) Make tcm_mod_dump_fabric_ops() smarter and generate function pointer
+ defs directly from include/target/target_core_fabric_ops.h:struct target_core_fabric_ops
+ structure members.
+
+October 5th, 2010
+Nicholas A. Bellinger <nab@linux-iscsi.org>
diff --git a/drivers/Kconfig b/drivers/Kconfig
index a2b902f..3002329 100644
--- a/drivers/Kconfig
+++ b/drivers/Kconfig
@@ -26,6 +26,8 @@ source "drivers/ata/Kconfig"
source "drivers/md/Kconfig"
+source "drivers/target/Kconfig"
+
source "drivers/message/fusion/Kconfig"
source "drivers/firewire/Kconfig"
diff --git a/drivers/Makefile b/drivers/Makefile
index f3ebb30..5d02b39 100644
--- a/drivers/Makefile
+++ b/drivers/Makefile
@@ -46,6 +46,7 @@ obj-y += macintosh/
obj-$(CONFIG_IDE) += ide/
obj-$(CONFIG_SCSI) += scsi/
obj-$(CONFIG_ATA) += ata/
+obj-$(CONFIG_TARGET_CORE) += target/
obj-$(CONFIG_MTD) += mtd/
obj-$(CONFIG_SPI) += spi/
obj-y += net/
diff --git a/drivers/target/Kconfig b/drivers/target/Kconfig
new file mode 100644
index 0000000..21fadd1
--- /dev/null
+++ b/drivers/target/Kconfig
@@ -0,0 +1,31 @@
+
+menuconfig TARGET_CORE
+ tristate "Generic Target Core Mod (TCM) and ConfigFS Infrastructure"
+ select CONFIGFS_FS
+ default n
+ help
+ Say Y or M here to enable the TCM Storage Engine and ConfigFS enabled
+ control path for target_core_mod. This includes built-in TCM RAMDISK
+ subsystem logic for virtual LUN 0 access
+
+if TARGET_CORE
+
+config TCM_IBLOCK
+ tristate "TCM/IBLOCK Subsystem Plugin for Linux/BLOCK"
+ help
+ Say Y here to enable the TCM/IBLOCK subsystem plugin for non-buffered
+ access to Linux/Block devices using BIO
+
+config TCM_FILEIO
+ tristate "TCM/FILEIO Subsystem Plugin for Linux/VFS"
+ help
+ Say Y here to enable the TCM/FILEIO subsystem plugin for buffered
+ access to Linux/VFS struct file or struct block_device
+
+config TCM_PSCSI
+ tristate "TCM/pSCSI Subsystem Plugin for Linux/SCSI"
+ help
+ Say Y here to enable the TCM/pSCSI subsystem plugin for non-buffered
+ passthrough access to Linux/SCSI device
+
+endif
diff --git a/drivers/target/Makefile b/drivers/target/Makefile
new file mode 100644
index 0000000..5cfd708
--- /dev/null
+++ b/drivers/target/Makefile
@@ -0,0 +1,24 @@
+EXTRA_CFLAGS += -I$(srctree)/drivers/target/ -I$(srctree)/drivers/scsi/
+
+target_core_mod-y := target_core_configfs.o \
+ target_core_device.o \
+ target_core_fabric_configfs.o \
+ target_core_fabric_lib.o \
+ target_core_hba.o \
+ target_core_pr.o \
+ target_core_alua.o \
+ target_core_scdb.o \
+ target_core_tmr.o \
+ target_core_tpg.o \
+ target_core_transport.o \
+ target_core_cdb.o \
+ target_core_ua.o \
+ target_core_rd.o \
+ target_core_mib.o
+
+obj-$(CONFIG_TARGET_CORE) += target_core_mod.o
+
+# Subsystem modules
+obj-$(CONFIG_TCM_IBLOCK) += target_core_iblock.o
+obj-$(CONFIG_TCM_FILEIO) += target_core_file.o
+obj-$(CONFIG_TCM_PSCSI) += target_core_pscsi.o
--
1.7.3.4
^ permalink raw reply related [flat|nested] 22+ messages in thread* [PATCH v2 03/03] tcm_loop: Add multi-fabric Linux/SCSI LLD fabric module
2010-12-17 21:11 [PATCH v2 00/03] target: Initial merge of v4.0.0-rc6 for .38 Nicholas A. Bellinger
` (19 preceding siblings ...)
2010-12-17 21:11 ` [PATCH v2 02s/03] target: Add Kbuild and Kconfig for drivers/target and Documentation/target/ Nicholas A. Bellinger
@ 2010-12-17 21:11 ` Nicholas A. Bellinger
20 siblings, 0 replies; 22+ messages in thread
From: Nicholas A. Bellinger @ 2010-12-17 21:11 UTC (permalink / raw)
To: linux-scsi, James Bottomley; +Cc: Nicholas Bellinger
From: Nicholas Bellinger <nab@linux-iscsi.org>
This patch adds the TCM_Loop Linux/SCSI LLD fabric module for accessing TCM device
backstores as locally accessable SCSI LUNs in virtual SAS, FC, and iSCSI Target ports
using the generic fabric TransportID and Target Port WWN naming handlers from TCM's
target_core_fabric_lib.c The TCM_Loop module uses the generic fabric configfs infratructure
provided by target_core_fabric_configfs.c and adds a module dependent attribute for the
creation/release of the virtual I_T Nexus connected the TCM_Loop Target and Initiator Ports.
TCM_Loop can also be used with the scsi-generic driver so that STGT userspace
fabric modules, QEMU-KVM and other hypervisor SCSI passthrough support can
access TCM device backstore and control CDB emulation.
Signed-off-by: Nicholas A. Bellinger <nab@linux-iscsi.org>
---
drivers/target/Kconfig | 2 +
drivers/target/Makefile | 3 +
drivers/target/tcm_loop/Kconfig | 11 +
drivers/target/tcm_loop/Makefile | 11 +
drivers/target/tcm_loop/tcm_loop_configfs.c | 647 ++++++++++++++++++++++++
drivers/target/tcm_loop/tcm_loop_configfs.h | 2 +
drivers/target/tcm_loop/tcm_loop_core.h | 77 +++
drivers/target/tcm_loop/tcm_loop_fabric.c | 473 +++++++++++++++++
drivers/target/tcm_loop/tcm_loop_fabric.h | 40 ++
drivers/target/tcm_loop/tcm_loop_fabric_scsi.c | 605 ++++++++++++++++++++++
drivers/target/tcm_loop/tcm_loop_fabric_scsi.h | 10 +
11 files changed, 1881 insertions(+), 0 deletions(-)
create mode 100644 drivers/target/tcm_loop/Kconfig
create mode 100644 drivers/target/tcm_loop/Makefile
create mode 100644 drivers/target/tcm_loop/tcm_loop_configfs.c
create mode 100644 drivers/target/tcm_loop/tcm_loop_configfs.h
create mode 100644 drivers/target/tcm_loop/tcm_loop_core.h
create mode 100644 drivers/target/tcm_loop/tcm_loop_fabric.c
create mode 100644 drivers/target/tcm_loop/tcm_loop_fabric.h
create mode 100644 drivers/target/tcm_loop/tcm_loop_fabric_scsi.c
create mode 100644 drivers/target/tcm_loop/tcm_loop_fabric_scsi.h
diff --git a/drivers/target/Kconfig b/drivers/target/Kconfig
index 21fadd1..3d6ae0f 100644
--- a/drivers/target/Kconfig
+++ b/drivers/target/Kconfig
@@ -28,4 +28,6 @@ config TCM_PSCSI
Say Y here to enable the TCM/pSCSI subsystem plugin for non-buffered
passthrough access to Linux/SCSI device
+source "drivers/target/tcm_loop/Kconfig"
+
endif
diff --git a/drivers/target/Makefile b/drivers/target/Makefile
index 5cfd708..6127872 100644
--- a/drivers/target/Makefile
+++ b/drivers/target/Makefile
@@ -22,3 +22,6 @@ obj-$(CONFIG_TARGET_CORE) += target_core_mod.o
obj-$(CONFIG_TCM_IBLOCK) += target_core_iblock.o
obj-$(CONFIG_TCM_FILEIO) += target_core_file.o
obj-$(CONFIG_TCM_PSCSI) += target_core_pscsi.o
+
+# Fabric modules
+obj-$(CONFIG_TCM_LOOP_FABRIC) += tcm_loop/
diff --git a/drivers/target/tcm_loop/Kconfig b/drivers/target/tcm_loop/Kconfig
new file mode 100644
index 0000000..633aaf4
--- /dev/null
+++ b/drivers/target/tcm_loop/Kconfig
@@ -0,0 +1,11 @@
+config TCM_LOOP_FABRIC
+ tristate "TCM Virtual SAS target and Linux/SCSI LDD fabric loopback module"
+ help
+ Say Y here to enable the TCM Virtual SAS target and Linux/SCSI LLD
+ fabric loopback module.
+
+config TCM_LOOP_CDB_DEBUG
+ bool "TCM loopback fabric module CDB debug code"
+ depends on TCM_LOOP_FABRIC
+ help
+ Say Y here to enable the TCM loopback fabric module CDB debug code
diff --git a/drivers/target/tcm_loop/Makefile b/drivers/target/tcm_loop/Makefile
new file mode 100644
index 0000000..d5088ec
--- /dev/null
+++ b/drivers/target/tcm_loop/Makefile
@@ -0,0 +1,11 @@
+EXTRA_CFLAGS += -I$(srctree)/drivers/target/ -I$(srctree)/drivers/scsi/ -I$(srctree)/include/scsi/ -I$(srctree)/drivers/target/tcm_loop/
+
+tcm_loop-y := tcm_loop_fabric.o \
+ tcm_loop_fabric_scsi.o \
+ tcm_loop_configfs.o \
+
+obj-$(CONFIG_TCM_LOOP_FABRIC) += tcm_loop.o
+
+ifdef CONFIG_TCM_LOOP_CDB_DEBUG
+EXTRA_CFLAGS += -DTCM_LOOP_CDB_DEBUG
+endif
diff --git a/drivers/target/tcm_loop/tcm_loop_configfs.c b/drivers/target/tcm_loop/tcm_loop_configfs.c
new file mode 100644
index 0000000..d93338d
--- /dev/null
+++ b/drivers/target/tcm_loop/tcm_loop_configfs.c
@@ -0,0 +1,647 @@
+/*******************************************************************************
+ * Filename: tcm_loop_configfs.c
+ *
+ * This file contains configfs implemenation for initiator and target
+ * side CDB level emulation of SAS, FC and iSCSI ports to Linux/SCSI LUNs.
+ *
+ * Copyright (c) 2009, 2010 Rising Tide, Inc.
+ * Copyright (c) 2009, 2010 Linux-iSCSI.org
+ *
+ * Copyright (c) 2009, 2010 Nicholas A. Bellinger <nab@linux-iscsi.org>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ ****************************************************************************/
+
+#include <linux/module.h>
+#include <linux/moduleparam.h>
+#include <linux/version.h>
+#include <generated/utsrelease.h>
+#include <linux/utsname.h>
+#include <linux/init.h>
+#include <linux/slab.h>
+#include <linux/kthread.h>
+#include <linux/types.h>
+#include <linux/string.h>
+#include <linux/configfs.h>
+#include <scsi/scsi.h>
+#include <scsi/scsi_host.h>
+#include <scsi/scsi_device.h>
+#include <scsi/scsi_cmnd.h>
+
+#include <target/target_core_base.h>
+#include <target/target_core_transport.h>
+#include <target/target_core_fabric_ops.h>
+#include <target/target_core_fabric_configfs.h>
+#include <target/target_core_fabric_lib.h>
+#include <target/target_core_device.h>
+#include <target/target_core_tpg.h>
+#include <target/target_core_configfs.h>
+#include <target/target_core_base.h>
+#include <target/configfs_macros.h>
+
+#include <tcm_loop_core.h>
+#include <tcm_loop_configfs.h>
+#include <tcm_loop_fabric.h>
+#include <tcm_loop_fabric_scsi.h>
+
+/* Local pointer to allocated TCM configfs fabric module */
+struct target_fabric_configfs *tcm_loop_fabric_configfs;
+
+static int tcm_loop_hba_no_cnt;
+
+static char *tcm_loop_dump_proto_id(struct tcm_loop_hba *tl_hba)
+{
+ switch (tl_hba->tl_proto_id) {
+ case SCSI_PROTOCOL_SAS:
+ return "SAS";
+ case SCSI_PROTOCOL_FCP:
+ return "FCP";
+ case SCSI_PROTOCOL_ISCSI:
+ return "iSCSI";
+ default:
+ break;
+ }
+
+ return "Unknown";
+}
+
+/* Start items for tcm_loop_port_cit */
+
+int tcm_loop_port_link(
+ struct se_portal_group *se_tpg,
+ struct se_lun *lun)
+{
+ struct tcm_loop_tpg *tl_tpg = container_of(se_tpg,
+ struct tcm_loop_tpg, tl_se_tpg);
+ struct tcm_loop_hba *tl_hba = tl_tpg->tl_hba;
+
+ atomic_inc(&tl_tpg->tl_tpg_port_count);
+ smp_mb__after_atomic_inc();
+ /*
+ * Add Linux/SCSI struct scsi_device by HCTL
+ */
+ scsi_add_device(tl_hba->sh, 0, tl_tpg->tl_tpgt, lun->unpacked_lun);
+
+ printk(KERN_INFO "TCM_Loop_ConfigFS: Port Link Successful\n");
+ return 0;
+}
+
+void tcm_loop_port_unlink(
+ struct se_portal_group *se_tpg,
+ struct se_lun *se_lun)
+{
+ struct scsi_device *sd;
+ struct tcm_loop_hba *tl_hba;
+ struct tcm_loop_tpg *tl_tpg;
+
+ tl_tpg = container_of(se_tpg, struct tcm_loop_tpg, tl_se_tpg);
+ tl_hba = tl_tpg->tl_hba;
+
+ sd = scsi_device_lookup(tl_hba->sh, 0, tl_tpg->tl_tpgt,
+ se_lun->unpacked_lun);
+ if (!(sd)) {
+ printk(KERN_ERR "Unable to locate struct scsi_device for %d:%d:"
+ "%d\n", 0, tl_tpg->tl_tpgt, se_lun->unpacked_lun);
+ return;
+ }
+ /*
+ * Remove Linux/SCSI struct scsi_device by HCTL
+ */
+ scsi_remove_device(sd);
+ scsi_device_put(sd);
+
+ atomic_dec(&tl_tpg->tl_tpg_port_count);
+ smp_mb__after_atomic_dec();
+
+ printk(KERN_INFO "TCM_Loop_ConfigFS: Port Unlink Successful\n");
+}
+
+/* End items for tcm_loop_port_cit */
+
+/* Start items for tcm_loop_nexus_cit */
+
+static int tcm_loop_make_nexus(
+ struct tcm_loop_tpg *tl_tpg,
+ const char *name)
+{
+ struct se_portal_group *se_tpg;
+ struct tcm_loop_hba *tl_hba = tl_tpg->tl_hba;
+ struct tcm_loop_nexus *tl_nexus;
+
+ if (tl_tpg->tl_hba->tl_nexus) {
+ printk(KERN_INFO "tl_tpg->tl_hba->tl_nexus already exists\n");
+ return -EEXIST;
+ }
+ se_tpg = &tl_tpg->tl_se_tpg;
+
+ tl_nexus = kzalloc(sizeof(struct tcm_loop_nexus), GFP_KERNEL);
+ if (!(tl_nexus)) {
+ printk(KERN_ERR "Unable to allocate struct tcm_loop_nexus\n");
+ return -ENOMEM;
+ }
+ /*
+ * Initialize the struct se_session pointer
+ */
+ tl_nexus->se_sess = transport_init_session();
+ if (!(tl_nexus->se_sess))
+ goto out;
+ /*
+ * Since we are running in 'demo mode' this call with generate a
+ * struct se_node_acl for the tcm_loop struct se_portal_group with the SCSI
+ * Initiator port name of the passed configfs group 'name'.
+ */
+ tl_nexus->se_sess->se_node_acl = core_tpg_check_initiator_node_acl(
+ se_tpg, (unsigned char *)name);
+ if (!(tl_nexus->se_sess->se_node_acl)) {
+ transport_free_session(tl_nexus->se_sess);
+ goto out;
+ }
+ /*
+ * Now, register the SAS I_T Nexus as active with the call to
+ * transport_register_session()
+ */
+ __transport_register_session(se_tpg, tl_nexus->se_sess->se_node_acl,
+ tl_nexus->se_sess, (void *)tl_nexus);
+ tl_tpg->tl_hba->tl_nexus = tl_nexus;
+ printk(KERN_INFO "TCM_Loop_ConfigFS: Established I_T Nexus to emulated"
+ " %s Initiator Port: %s\n", tcm_loop_dump_proto_id(tl_hba),
+ name);
+ return 0;
+
+out:
+ kfree(tl_nexus);
+ return -ENOMEM;
+}
+
+static int tcm_loop_drop_nexus(
+ struct tcm_loop_tpg *tpg)
+{
+ struct se_session *se_sess;
+ struct tcm_loop_nexus *tl_nexus;
+ struct tcm_loop_hba *tl_hba = tpg->tl_hba;
+
+ tl_nexus = tpg->tl_hba->tl_nexus;
+ if (!(tl_nexus))
+ return -ENODEV;
+
+ se_sess = tl_nexus->se_sess;
+ if (!(se_sess))
+ return -ENODEV;
+
+ if (atomic_read(&tpg->tl_tpg_port_count)) {
+ printk(KERN_ERR "Unable to remove TCM_Loop I_T Nexus with"
+ " active TPG port count: %d\n",
+ atomic_read(&tpg->tl_tpg_port_count));
+ return -EPERM;
+ }
+
+ printk(KERN_INFO "TCM_Loop_ConfigFS: Removing I_T Nexus to emulated"
+ " %s Initiator Port: %s\n", tcm_loop_dump_proto_id(tl_hba),
+ tl_nexus->se_sess->se_node_acl->initiatorname);
+ /*
+ * Release the SCSI I_T Nexus to the emulated SAS Target Port
+ */
+ transport_deregister_session(tl_nexus->se_sess);
+ tpg->tl_hba->tl_nexus = NULL;
+ kfree(tl_nexus);
+ return 0;
+}
+
+/* End items for tcm_loop_nexus_cit */
+
+static ssize_t tcm_loop_tpg_show_nexus(
+ struct se_portal_group *se_tpg,
+ char *page)
+{
+ struct tcm_loop_tpg *tl_tpg = container_of(se_tpg,
+ struct tcm_loop_tpg, tl_se_tpg);
+ struct tcm_loop_nexus *tl_nexus;
+ ssize_t ret;
+
+ tl_nexus = tl_tpg->tl_hba->tl_nexus;
+ if (!(tl_nexus))
+ return -ENODEV;
+
+ ret = snprintf(page, PAGE_SIZE, "%s\n",
+ tl_nexus->se_sess->se_node_acl->initiatorname);
+
+ return ret;
+}
+
+static ssize_t tcm_loop_tpg_store_nexus(
+ struct se_portal_group *se_tpg,
+ const char *page,
+ size_t count)
+{
+ struct tcm_loop_tpg *tl_tpg = container_of(se_tpg,
+ struct tcm_loop_tpg, tl_se_tpg);
+ struct tcm_loop_hba *tl_hba = tl_tpg->tl_hba;
+ unsigned char i_port[TL_WWN_ADDR_LEN], *ptr, *port_ptr;
+ int ret;
+ /*
+ * Shutdown the active I_T nexus if 'NULL' is passed..
+ */
+ if (!(strncmp(page, "NULL", 4))) {
+ ret = tcm_loop_drop_nexus(tl_tpg);
+ return (!ret) ? count : ret;
+ }
+ /*
+ * Otherwise make sure the passed virtual Initiator port WWN matches
+ * the fabric protocol_id set in tcm_loop_make_scsi_hba(), and call
+ * tcm_loop_make_nexus()
+ */
+ if (strlen(page) > TL_WWN_ADDR_LEN) {
+ printk(KERN_ERR "Emulated NAA Sas Address: %s, exceeds"
+ " max: %d\n", page, TL_WWN_ADDR_LEN);
+ return -EINVAL;
+ }
+ snprintf(&i_port[0], TL_WWN_ADDR_LEN, "%s", page);
+
+ ptr = strstr(i_port, "naa.");
+ if (ptr) {
+ if (tl_hba->tl_proto_id != SCSI_PROTOCOL_SAS) {
+ printk(KERN_ERR "Passed SAS Initiator Port %s does not"
+ " match target port protoid: %s\n", i_port,
+ tcm_loop_dump_proto_id(tl_hba));
+ return -EINVAL;
+ }
+ port_ptr = &i_port[0];
+ goto check_newline;
+ }
+ ptr = strstr(i_port, "fc.");
+ if (ptr) {
+ if (tl_hba->tl_proto_id != SCSI_PROTOCOL_FCP) {
+ printk(KERN_ERR "Passed FCP Initiator Port %s does not"
+ " match target port protoid: %s\n", i_port,
+ tcm_loop_dump_proto_id(tl_hba));
+ return -EINVAL;
+ }
+ port_ptr = &i_port[3]; /* Skip over "fc." */
+ goto check_newline;
+ }
+ ptr = strstr(i_port, "iqn.");
+ if (ptr) {
+ if (tl_hba->tl_proto_id != SCSI_PROTOCOL_ISCSI) {
+ printk(KERN_ERR "Passed iSCSI Initiator Port %s does not"
+ " match target port protoid: %s\n", i_port,
+ tcm_loop_dump_proto_id(tl_hba));
+ return -EINVAL;
+ }
+ port_ptr = &i_port[0];
+ goto check_newline;
+ }
+ printk(KERN_ERR "Unable to locate prefix for emulated Initiator Port:"
+ " %s\n", i_port);
+ return -EINVAL;
+ /*
+ * Clear any trailing newline for the NAA WWN
+ */
+check_newline:
+ if (i_port[strlen(i_port)-1] == '\n')
+ i_port[strlen(i_port)-1] = '\0';
+
+ ret = tcm_loop_make_nexus(tl_tpg, port_ptr);
+ if (ret < 0)
+ return ret;
+
+ return count;
+}
+
+TF_TPG_BASE_ATTR(tcm_loop, nexus, S_IRUGO | S_IWUSR);
+
+static struct configfs_attribute *tcm_loop_tpg_attrs[] = {
+ &tcm_loop_tpg_nexus.attr,
+ NULL,
+};
+
+/* Start items for tcm_loop_naa_cit */
+
+struct se_portal_group *tcm_loop_make_naa_tpg(
+ struct se_wwn *wwn,
+ struct config_group *group,
+ const char *name)
+{
+ struct tcm_loop_hba *tl_hba = container_of(wwn,
+ struct tcm_loop_hba, tl_hba_wwn);
+ struct tcm_loop_tpg *tl_tpg;
+ char *tpgt_str, *end_ptr;
+ int ret;
+ unsigned short int tpgt;
+
+ tpgt_str = strstr(name, "tpgt_");
+ if (!(tpgt_str)) {
+ printk(KERN_ERR "Unable to locate \"tpgt_#\" directory"
+ " group\n");
+ return ERR_PTR(-EINVAL);
+ }
+ tpgt_str += 5; /* Skip ahead of "tpgt_" */
+ tpgt = (unsigned short int) simple_strtoul(tpgt_str, &end_ptr, 0);
+
+ if (tpgt > TL_TPGS_PER_HBA) {
+ printk(KERN_ERR "Passed tpgt: %hu exceeds TL_TPGS_PER_HBA:"
+ " %u\n", tpgt, TL_TPGS_PER_HBA);
+ return ERR_PTR(-EINVAL);
+ }
+ tl_tpg = &tl_hba->tl_hba_tpgs[tpgt];
+ tl_tpg->tl_hba = tl_hba;
+ tl_tpg->tl_tpgt = tpgt;
+ /*
+ * Register the tl_tpg as a emulated SAS TCM Target Endpoint
+ */
+ ret = core_tpg_register(&tcm_loop_fabric_configfs->tf_ops,
+ wwn, &tl_tpg->tl_se_tpg, (void *)tl_tpg,
+ TRANSPORT_TPG_TYPE_NORMAL);
+ if (ret < 0)
+ return ERR_PTR(-ENOMEM);
+
+ printk(KERN_INFO "TCM_Loop_ConfigFS: Allocated Emulated %s"
+ " Target Port %s,t,0x%04x\n", tcm_loop_dump_proto_id(tl_hba),
+ config_item_name(&wwn->wwn_group.cg_item), tpgt);
+
+ return &tl_tpg->tl_se_tpg;
+}
+
+void tcm_loop_drop_naa_tpg(
+ struct se_portal_group *se_tpg)
+{
+ struct se_wwn *wwn = se_tpg->se_tpg_wwn;
+ struct tcm_loop_tpg *tl_tpg = container_of(se_tpg,
+ struct tcm_loop_tpg, tl_se_tpg);
+ struct tcm_loop_hba *tl_hba;
+ unsigned short tpgt;
+
+ tl_hba = tl_tpg->tl_hba;
+ tpgt = tl_tpg->tl_tpgt;
+ /*
+ * Release the I_T Nexus for the Virtual SAS link if present
+ */
+ tcm_loop_drop_nexus(tl_tpg);
+ /*
+ * Deregister the tl_tpg as a emulated SAS TCM Target Endpoint
+ */
+ core_tpg_deregister(se_tpg);
+
+ printk(KERN_INFO "TCM_Loop_ConfigFS: Deallocated Emulated %s"
+ " Target Port %s,t,0x%04x\n", tcm_loop_dump_proto_id(tl_hba),
+ config_item_name(&wwn->wwn_group.cg_item), tpgt);
+}
+
+/* End items for tcm_loop_naa_cit */
+
+/* Start items for tcm_loop_cit */
+
+struct se_wwn *tcm_loop_make_scsi_hba(
+ struct target_fabric_configfs *tf,
+ struct config_group *group,
+ const char *name)
+{
+ struct tcm_loop_hba *tl_hba;
+ struct Scsi_Host *sh;
+ char *ptr;
+ int ret, off = 0;
+
+ tl_hba = kzalloc(sizeof(struct tcm_loop_hba), GFP_KERNEL);
+ if (!(tl_hba)) {
+ printk(KERN_ERR "Unable to allocate struct tcm_loop_hba\n");
+ return ERR_PTR(-ENOMEM);
+ }
+ /*
+ * Determine the emulated Protocol Identifier and Target Port Name
+ * based on the incoming configfs directory name.
+ */
+ ptr = strstr(name, "naa.");
+ if (ptr) {
+ tl_hba->tl_proto_id = SCSI_PROTOCOL_SAS;
+ goto check_len;
+ }
+ ptr = strstr(name, "fc.");
+ if (ptr) {
+ tl_hba->tl_proto_id = SCSI_PROTOCOL_FCP;
+ off = 3; /* Skip over "fc." */
+ goto check_len;
+ }
+ ptr = strstr(name, "iqn.");
+ if (ptr) {
+ tl_hba->tl_proto_id = SCSI_PROTOCOL_ISCSI;
+ goto check_len;
+ }
+
+ printk(KERN_ERR "Unable to locate prefix for emulated Target Port:"
+ " %s\n", name);
+ return ERR_PTR(-EINVAL);
+
+check_len:
+ if (strlen(name) > TL_WWN_ADDR_LEN) {
+ printk(KERN_ERR "Emulated NAA %s Address: %s, exceeds"
+ " max: %d\n", name, tcm_loop_dump_proto_id(tl_hba),
+ TL_WWN_ADDR_LEN);
+ kfree(tl_hba);
+ return ERR_PTR(-EINVAL);
+ }
+ snprintf(&tl_hba->tl_wwn_address[0], TL_WWN_ADDR_LEN, "%s", &name[off]);
+
+ /*
+ * Call device_register(tl_hba->dev) to register the emulated
+ * Linux/SCSI LLD of type struct Scsi_Host at tl_hba->sh after
+ * device_register() callbacks in tcm_loop_driver_probe()
+ */
+ ret = tcm_loop_setup_hba_bus(tl_hba, tcm_loop_hba_no_cnt);
+ if (ret)
+ goto out;
+
+ sh = tl_hba->sh;
+ tcm_loop_hba_no_cnt++;
+ printk(KERN_INFO "TCM_Loop_ConfigFS: Allocated emulated Target"
+ " %s Address: %s at Linux/SCSI Host ID: %d\n",
+ tcm_loop_dump_proto_id(tl_hba), name, sh->host_no);
+
+ return &tl_hba->tl_hba_wwn;
+out:
+ kfree(tl_hba);
+ return ERR_PTR(ret);
+}
+
+void tcm_loop_drop_scsi_hba(
+ struct se_wwn *wwn)
+{
+ struct tcm_loop_hba *tl_hba = container_of(wwn,
+ struct tcm_loop_hba, tl_hba_wwn);
+ int host_no = tl_hba->sh->host_no;
+ /*
+ * Call device_unregister() on the original tl_hba->dev.
+ * tcm_loop_fabric_scsi.c:tcm_loop_release_adapter() will
+ * release *tl_hba;
+ */
+ device_unregister(&tl_hba->dev);
+
+ printk(KERN_INFO "TCM_Loop_ConfigFS: Deallocated emulated Target"
+ " SAS Address: %s at Linux/SCSI Host ID: %d\n",
+ config_item_name(&wwn->wwn_group.cg_item), host_no);
+}
+
+/* Start items for tcm_loop_cit */
+static ssize_t tcm_loop_wwn_show_attr_version(
+ struct target_fabric_configfs *tf,
+ char *page)
+{
+ return sprintf(page, "TCM Loopback Fabric module %s on %s/%s"
+ " on "UTS_RELEASE"\n", TCM_LOOP_VERSION, utsname()->sysname,
+ utsname()->machine);
+}
+
+TF_WWN_ATTR_RO(tcm_loop, version);
+
+static struct configfs_attribute *tcm_loop_wwn_attrs[] = {
+ &tcm_loop_wwn_version.attr,
+ NULL,
+};
+
+/* End items for tcm_loop_cit */
+
+int tcm_loop_register_configfs(void)
+{
+ struct target_fabric_configfs *fabric;
+ struct config_group *tf_cg;
+ int ret;
+ /*
+ * Set the TCM Loop HBA counter to zero
+ */
+ tcm_loop_hba_no_cnt = 0;
+ /*
+ * Register the top level struct config_item_type with TCM core
+ */
+ fabric = target_fabric_configfs_init(THIS_MODULE, "loopback");
+ if (!(fabric)) {
+ printk(KERN_ERR "tcm_loop_register_configfs() failed!\n");
+ return -1;
+ }
+ /*
+ * Setup the fabric API of function pointers used by target_core_mod
+ */
+ fabric->tf_ops.get_fabric_name = &tcm_loop_get_fabric_name;
+ fabric->tf_ops.get_fabric_proto_ident = &tcm_loop_get_fabric_proto_ident;
+ fabric->tf_ops.tpg_get_wwn = &tcm_loop_get_endpoint_wwn;
+ fabric->tf_ops.tpg_get_tag = &tcm_loop_get_tag;
+ fabric->tf_ops.tpg_get_default_depth = &tcm_loop_get_default_depth;
+ fabric->tf_ops.tpg_get_pr_transport_id = &tcm_loop_get_pr_transport_id;
+ fabric->tf_ops.tpg_get_pr_transport_id_len =
+ &tcm_loop_get_pr_transport_id_len;
+ fabric->tf_ops.tpg_parse_pr_out_transport_id =
+ &tcm_loop_parse_pr_out_transport_id;
+ fabric->tf_ops.tpg_check_demo_mode = &tcm_loop_check_demo_mode;
+ fabric->tf_ops.tpg_check_demo_mode_cache =
+ &tcm_loop_check_demo_mode_cache;
+ fabric->tf_ops.tpg_check_demo_mode_write_protect =
+ &tcm_loop_check_demo_mode_write_protect;
+ fabric->tf_ops.tpg_check_prod_mode_write_protect =
+ &tcm_loop_check_prod_mode_write_protect;
+ /*
+ * The TCM loopback fabric module runs in demo-mode to a local
+ * virtual SCSI device, so fabric dependent initator ACLs are
+ * not required.
+ */
+ fabric->tf_ops.tpg_alloc_fabric_acl = &tcm_loop_tpg_alloc_fabric_acl;
+ fabric->tf_ops.tpg_release_fabric_acl =
+ &tcm_loop_tpg_release_fabric_acl;
+ fabric->tf_ops.tpg_get_inst_index = &tcm_loop_get_inst_index;
+ /*
+ * Since tcm_loop is mapping physical memory from Linux/SCSI
+ * struct scatterlist arrays for each struct scsi_cmnd I/O,
+ * we do not need TCM to allocate a iovec array for
+ * virtual memory address mappings
+ */
+ fabric->tf_ops.alloc_cmd_iovecs = NULL;
+ /*
+ * Used for setting up remaining TCM resources in process context
+ */
+ fabric->tf_ops.new_cmd_map = &tcm_loop_new_cmd_map;
+ fabric->tf_ops.check_stop_free = &tcm_loop_check_stop_free;
+ fabric->tf_ops.release_cmd_to_pool = &tcm_loop_deallocate_core_cmd;
+ fabric->tf_ops.release_cmd_direct = &tcm_loop_deallocate_core_cmd;
+ fabric->tf_ops.shutdown_session = &tcm_loop_shutdown_session;
+ fabric->tf_ops.close_session = &tcm_loop_close_session;
+ fabric->tf_ops.stop_session = &tcm_loop_stop_session;
+ fabric->tf_ops.fall_back_to_erl0 = &tcm_loop_fall_back_to_erl0;
+ fabric->tf_ops.sess_logged_in = &tcm_loop_sess_logged_in;
+ fabric->tf_ops.sess_get_index = &tcm_loop_sess_get_index;
+ fabric->tf_ops.sess_get_initiator_sid = NULL;
+ fabric->tf_ops.write_pending = &tcm_loop_write_pending;
+ fabric->tf_ops.write_pending_status = &tcm_loop_write_pending_status;
+ /*
+ * Not used for TCM loopback
+ */
+ fabric->tf_ops.set_default_node_attributes =
+ &tcm_loop_set_default_node_attributes;
+ fabric->tf_ops.get_task_tag = &tcm_loop_get_task_tag;
+ fabric->tf_ops.get_cmd_state = &tcm_loop_get_cmd_state;
+ fabric->tf_ops.new_cmd_failure = &tcm_loop_new_cmd_failure;
+ fabric->tf_ops.queue_data_in = &tcm_loop_queue_data_in;
+ fabric->tf_ops.queue_status = &tcm_loop_queue_status;
+ fabric->tf_ops.queue_tm_rsp = &tcm_loop_queue_tm_rsp;
+ fabric->tf_ops.set_fabric_sense_len = &tcm_loop_set_fabric_sense_len;
+ fabric->tf_ops.get_fabric_sense_len = &tcm_loop_get_fabric_sense_len;
+ fabric->tf_ops.is_state_remove = &tcm_loop_is_state_remove;
+ fabric->tf_ops.pack_lun = &tcm_loop_pack_lun;
+
+ tf_cg = &fabric->tf_group;
+ /*
+ * Setup function pointers for generic logic in target_core_fabric_configfs.c
+ */
+ fabric->tf_ops.fabric_make_wwn = &tcm_loop_make_scsi_hba;
+ fabric->tf_ops.fabric_drop_wwn = &tcm_loop_drop_scsi_hba;
+ fabric->tf_ops.fabric_make_tpg = &tcm_loop_make_naa_tpg;
+ fabric->tf_ops.fabric_drop_tpg = &tcm_loop_drop_naa_tpg;
+ /*
+ * fabric_post_link() and fabric_pre_unlink() are used for
+ * registration and release of TCM Loop Virtual SCSI LUNs.
+ */
+ fabric->tf_ops.fabric_post_link = &tcm_loop_port_link;
+ fabric->tf_ops.fabric_pre_unlink = &tcm_loop_port_unlink;
+ fabric->tf_ops.fabric_make_np = NULL;
+ fabric->tf_ops.fabric_drop_np = NULL;
+ /*
+ * Setup default attribute lists for various fabric->tf_cit_tmpl
+ */
+ TF_CIT_TMPL(fabric)->tfc_wwn_cit.ct_attrs = tcm_loop_wwn_attrs;
+ TF_CIT_TMPL(fabric)->tfc_tpg_base_cit.ct_attrs = tcm_loop_tpg_attrs;
+ TF_CIT_TMPL(fabric)->tfc_tpg_attrib_cit.ct_attrs = NULL;
+ TF_CIT_TMPL(fabric)->tfc_tpg_param_cit.ct_attrs = NULL;
+ TF_CIT_TMPL(fabric)->tfc_tpg_np_base_cit.ct_attrs = NULL;
+ /*
+ * Once fabric->tf_ops has been setup, now register the fabric for
+ * use within TCM
+ */
+ ret = target_fabric_configfs_register(fabric);
+ if (ret < 0) {
+ printk(KERN_ERR "target_fabric_configfs_register() for"
+ " TCM_Loop failed!\n");
+ target_fabric_configfs_free(fabric);
+ return -1;
+ }
+ /*
+ * Setup our local pointer to *fabric.
+ */
+ tcm_loop_fabric_configfs = fabric;
+ printk(KERN_INFO "TCM_LOOP[0] - Set fabric ->"
+ " tcm_loop_fabric_configfs\n");
+ return 0;
+}
+
+void tcm_loop_deregister_configfs(void)
+{
+ if (!(tcm_loop_fabric_configfs))
+ return;
+
+ target_fabric_configfs_deregister(tcm_loop_fabric_configfs);
+ tcm_loop_fabric_configfs = NULL;
+ printk(KERN_INFO "TCM_LOOP[0] - Cleared"
+ " tcm_loop_fabric_configfs\n");
+}
diff --git a/drivers/target/tcm_loop/tcm_loop_configfs.h b/drivers/target/tcm_loop/tcm_loop_configfs.h
new file mode 100644
index 0000000..f46aa4b
--- /dev/null
+++ b/drivers/target/tcm_loop/tcm_loop_configfs.h
@@ -0,0 +1,2 @@
+extern int tcm_loop_register_configfs(void);
+extern void tcm_loop_deregister_configfs(void);
diff --git a/drivers/target/tcm_loop/tcm_loop_core.h b/drivers/target/tcm_loop/tcm_loop_core.h
new file mode 100644
index 0000000..5e218a7
--- /dev/null
+++ b/drivers/target/tcm_loop/tcm_loop_core.h
@@ -0,0 +1,77 @@
+#define TCM_LOOP_VERSION "v2.0"
+#define TL_WWN_ADDR_LEN 256
+#define TL_TPGS_PER_HBA 32
+/*
+ * Defaults for struct scsi_host_template tcm_loop_driver_template
+ *
+ * We use large can_queue and cmd_per_lun here and let TCM enforce
+ * the underlying se_device_t->queue_depth.
+ */
+#define TL_SCSI_CAN_QUEUE 1024
+#define TL_SCSI_CMD_PER_LUN 1024
+#define TL_SCSI_MAX_SECTORS 1024
+#define TL_SCSI_SG_TABLESIZE 256
+/*
+ * Used in tcm_loop_driver_probe() for struct Scsi_Host->max_cmd_len
+ */
+#define TL_SCSI_MAX_CMD_LEN 32
+
+#ifdef TCM_LOOP_CDB_DEBUG
+# define TL_CDB_DEBUG(x...) printk(KERN_INFO x)
+#else
+# define TL_CDB_DEBUG(x...)
+#endif
+
+struct tcm_loop_cmd {
+ /* State of Linux/SCSI CDB+Data descriptor */
+ u32 sc_cmd_state;
+ /* Pointer to the CDB+Data descriptor from Linux/SCSI subsystem */
+ struct scsi_cmnd *sc;
+ struct list_head *tl_cmd_list;
+ /* The TCM I/O descriptor that is accessed via container_of() */
+ struct se_cmd tl_se_cmd;
+ /* Sense buffer that will be mapped into outgoing status */
+ unsigned char tl_sense_buf[TRANSPORT_SENSE_BUFFER];
+};
+
+struct tcm_loop_tmr {
+ atomic_t tmr_complete;
+ wait_queue_head_t tl_tmr_wait;
+};
+
+struct tcm_loop_nexus {
+ int it_nexus_active;
+ /*
+ * Pointer to Linux/SCSI HBA from linux/include/scsi_host.h
+ */
+ struct scsi_host *sh;
+ /*
+ * Pointer to TCM session for I_T Nexus
+ */
+ struct se_session *se_sess;
+};
+
+struct tcm_loop_nacl {
+ struct se_node_acl se_node_acl;
+};
+
+struct tcm_loop_tpg {
+ unsigned short tl_tpgt;
+ atomic_t tl_tpg_port_count;
+ struct se_portal_group tl_se_tpg;
+ struct tcm_loop_hba *tl_hba;
+};
+
+struct tcm_loop_hba {
+ u8 tl_proto_id;
+ unsigned char tl_wwn_address[TL_WWN_ADDR_LEN];
+ struct se_hba_s *se_hba;
+ struct se_lun *tl_hba_lun;
+ struct se_port *tl_hba_lun_sep;
+ struct se_device_s *se_dev_hba_ptr;
+ struct tcm_loop_nexus *tl_nexus;
+ struct device dev;
+ struct Scsi_Host *sh;
+ struct tcm_loop_tpg tl_hba_tpgs[TL_TPGS_PER_HBA];
+ struct se_wwn tl_hba_wwn;
+};
diff --git a/drivers/target/tcm_loop/tcm_loop_fabric.c b/drivers/target/tcm_loop/tcm_loop_fabric.c
new file mode 100644
index 0000000..b868789
--- /dev/null
+++ b/drivers/target/tcm_loop/tcm_loop_fabric.c
@@ -0,0 +1,473 @@
+/*******************************************************************************
+ * Filename: tcm_loop_fabric.c
+ *
+ * This file contains the TCM loopback fabric module for initiator and target
+ * side CDB level emulation of SAS, FC and iSCSI ports to Linux/SCSI LUNs.
+ *
+ * Copyright (c) 2009, 2010 Rising Tide, Inc.
+ * Copyright (c) 2009, 2010 Linux-iSCSI.org
+ *
+ * Copyright (c) 2009, 2010 Nicholas A. Bellinger <nab@linux-iscsi.org>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ ****************************************************************************/
+
+#include <linux/module.h>
+#include <linux/moduleparam.h>
+#include <linux/init.h>
+#include <linux/slab.h>
+#include <linux/kthread.h>
+#include <linux/types.h>
+#include <linux/list.h>
+#include <linux/string.h>
+#include <scsi/scsi_host.h>
+#include <scsi/scsi_device.h>
+#include <scsi/scsi_cmnd.h>
+
+#include <target/target_core_base.h>
+#include <target/target_core_transport.h>
+#include <target/target_core_fabric_ops.h>
+#include <target/target_core_fabric_lib.h>
+#include <target/target_core_device.h>
+#include <target/target_core_tpg.h>
+#include <target/target_core_configfs.h>
+
+#include <tcm_loop_core.h>
+#include <tcm_loop_configfs.h>
+#include <tcm_loop_fabric_scsi.h>
+
+struct kmem_cache *tcm_loop_cmd_cache;
+
+char *tcm_loop_get_fabric_name(void)
+{
+ return "loopback";
+}
+
+u8 tcm_loop_get_fabric_proto_ident(struct se_portal_group *se_tpg)
+{
+ struct tcm_loop_tpg *tl_tpg =
+ (struct tcm_loop_tpg *)se_tpg->se_tpg_fabric_ptr;
+ struct tcm_loop_hba *tl_hba = tl_tpg->tl_hba;
+ /*
+ * tl_proto_id is set at tcm_loop_configfs.c:tcm_loop_make_scsi_hba()
+ * time based on the protocol dependent prefix of the passed configfs group.
+ *
+ * Based upon tl_proto_id, TCM_Loop emulates the requested fabric
+ * ProtocolID using target_core_fabric_lib.c symbols.
+ */
+ switch (tl_hba->tl_proto_id) {
+ case SCSI_PROTOCOL_SAS:
+ return sas_get_fabric_proto_ident(se_tpg);
+ case SCSI_PROTOCOL_FCP:
+ return fc_get_fabric_proto_ident(se_tpg);
+ case SCSI_PROTOCOL_ISCSI:
+ return iscsi_get_fabric_proto_ident(se_tpg);
+ default:
+ printk(KERN_ERR "Unknown tl_proto_id: 0x%02x, using"
+ " SAS emulation\n", tl_hba->tl_proto_id);
+ break;
+ }
+
+ return sas_get_fabric_proto_ident(se_tpg);
+}
+
+char *tcm_loop_get_endpoint_wwn(struct se_portal_group *se_tpg)
+{
+ struct tcm_loop_tpg *tl_tpg =
+ (struct tcm_loop_tpg *)se_tpg->se_tpg_fabric_ptr;
+ /*
+ * Return the passed NAA identifier for the SAS Target Port
+ */
+ return &tl_tpg->tl_hba->tl_wwn_address[0];
+}
+
+u16 tcm_loop_get_tag(struct se_portal_group *se_tpg)
+{
+ struct tcm_loop_tpg *tl_tpg =
+ (struct tcm_loop_tpg *)se_tpg->se_tpg_fabric_ptr;
+ /*
+ * This Tag is used when forming SCSI Name identifier in EVPD=1 0x83
+ * to represent the SCSI Target Port.
+ */
+ return tl_tpg->tl_tpgt;
+}
+
+u32 tcm_loop_get_default_depth(struct se_portal_group *se_tpg)
+{
+ return 1;
+}
+
+
+u32 tcm_loop_get_pr_transport_id(
+ struct se_portal_group *se_tpg,
+ struct se_node_acl *se_nacl,
+ struct t10_pr_registration *pr_reg,
+ int *format_code,
+ unsigned char *buf)
+{
+ struct tcm_loop_tpg *tl_tpg =
+ (struct tcm_loop_tpg *)se_tpg->se_tpg_fabric_ptr;
+ struct tcm_loop_hba *tl_hba = tl_tpg->tl_hba;
+
+ switch (tl_hba->tl_proto_id) {
+ case SCSI_PROTOCOL_SAS:
+ return sas_get_pr_transport_id(se_tpg, se_nacl, pr_reg,
+ format_code, buf);
+ case SCSI_PROTOCOL_FCP:
+ return fc_get_pr_transport_id(se_tpg, se_nacl, pr_reg,
+ format_code, buf);
+ case SCSI_PROTOCOL_ISCSI:
+ return iscsi_get_pr_transport_id(se_tpg, se_nacl, pr_reg,
+ format_code, buf);
+ default:
+ printk(KERN_ERR "Unknown tl_proto_id: 0x%02x, using"
+ " SAS emulation\n", tl_hba->tl_proto_id);
+ break;
+ }
+
+ return sas_get_pr_transport_id(se_tpg, se_nacl, pr_reg,
+ format_code, buf);
+}
+
+u32 tcm_loop_get_pr_transport_id_len(
+ struct se_portal_group *se_tpg,
+ struct se_node_acl *se_nacl,
+ struct t10_pr_registration *pr_reg,
+ int *format_code)
+{
+ struct tcm_loop_tpg *tl_tpg =
+ (struct tcm_loop_tpg *)se_tpg->se_tpg_fabric_ptr;
+ struct tcm_loop_hba *tl_hba = tl_tpg->tl_hba;
+
+ switch (tl_hba->tl_proto_id) {
+ case SCSI_PROTOCOL_SAS:
+ return sas_get_pr_transport_id_len(se_tpg, se_nacl, pr_reg,
+ format_code);
+ case SCSI_PROTOCOL_FCP:
+ return fc_get_pr_transport_id_len(se_tpg, se_nacl, pr_reg,
+ format_code);
+ case SCSI_PROTOCOL_ISCSI:
+ return iscsi_get_pr_transport_id_len(se_tpg, se_nacl, pr_reg,
+ format_code);
+ default:
+ printk(KERN_ERR "Unknown tl_proto_id: 0x%02x, using"
+ " SAS emulation\n", tl_hba->tl_proto_id);
+ break;
+ }
+
+ return sas_get_pr_transport_id_len(se_tpg, se_nacl, pr_reg,
+ format_code);
+}
+
+/*
+ * Used for handling SCSI fabric dependent TransportIDs in SPC-3 and above
+ * Persistent Reservation SPEC_I_PT=1 and PROUT REGISTER_AND_MOVE operations.
+ */
+char *tcm_loop_parse_pr_out_transport_id(
+ struct se_portal_group *se_tpg,
+ const char *buf,
+ u32 *out_tid_len,
+ char **port_nexus_ptr)
+{
+ struct tcm_loop_tpg *tl_tpg =
+ (struct tcm_loop_tpg *)se_tpg->se_tpg_fabric_ptr;
+ struct tcm_loop_hba *tl_hba = tl_tpg->tl_hba;
+
+ switch (tl_hba->tl_proto_id) {
+ case SCSI_PROTOCOL_SAS:
+ return sas_parse_pr_out_transport_id(se_tpg, buf, out_tid_len,
+ port_nexus_ptr);
+ case SCSI_PROTOCOL_FCP:
+ return fc_parse_pr_out_transport_id(se_tpg, buf, out_tid_len,
+ port_nexus_ptr);
+ case SCSI_PROTOCOL_ISCSI:
+ return iscsi_parse_pr_out_transport_id(se_tpg, buf, out_tid_len,
+ port_nexus_ptr);
+ default:
+ printk(KERN_ERR "Unknown tl_proto_id: 0x%02x, using"
+ " SAS emulation\n", tl_hba->tl_proto_id);
+ break;
+ }
+
+ return sas_parse_pr_out_transport_id(se_tpg, buf, out_tid_len,
+ port_nexus_ptr);
+}
+
+/*
+ * Returning (1) here allows for target_core_mod struct se_node_acl to be generated
+ * based upon the incoming fabric dependent SCSI Initiator Port
+ */
+int tcm_loop_check_demo_mode(struct se_portal_group *se_tpg)
+{
+ return 1;
+}
+
+int tcm_loop_check_demo_mode_cache(struct se_portal_group *se_tpg)
+{
+ return 0;
+}
+
+/*
+ * Allow I_T Nexus full READ-WRITE access without explict Initiator Node ACLs for
+ * local virtual Linux/SCSI LLD passthrough into VM hypervisor guest
+ */
+int tcm_loop_check_demo_mode_write_protect(struct se_portal_group *se_tpg)
+{
+ return 0;
+}
+
+/*
+ * Because TCM_Loop does not use explict ACLs and MappedLUNs, this will
+ * never be called for TCM_Loop by target_core_fabric_configfs.c code.
+ * It has been added here as a nop for target_fabric_tf_ops_check()
+ */
+int tcm_loop_check_prod_mode_write_protect(struct se_portal_group *se_tpg)
+{
+ return 0;
+}
+
+struct se_node_acl *tcm_loop_tpg_alloc_fabric_acl(
+ struct se_portal_group *se_tpg)
+{
+ struct tcm_loop_nacl *tl_nacl;
+
+ tl_nacl = kzalloc(sizeof( struct tcm_loop_nacl), GFP_KERNEL);
+ if (!(tl_nacl)) {
+ printk(KERN_ERR "Unable to allocate struct tcm_loop_nacl\n");
+ return NULL;
+ }
+
+ return &tl_nacl->se_node_acl;
+}
+
+void tcm_loop_tpg_release_fabric_acl(
+ struct se_portal_group *se_tpg,
+ struct se_node_acl *se_nacl)
+{
+ struct tcm_loop_nacl *tl_nacl = container_of(se_nacl,
+ struct tcm_loop_nacl, se_node_acl);
+
+ kfree(tl_nacl);
+}
+
+u32 tcm_loop_get_inst_index(struct se_portal_group *se_tpg)
+{
+ return 1;
+}
+
+void tcm_loop_new_cmd_failure(struct se_cmd *se_cmd)
+{
+ /*
+ * Since TCM_loop is already passing struct scatterlist data from
+ * struct scsi_cmnd, no more Linux/SCSI failure dependent state need
+ * to be handled here.
+ */
+ return;
+}
+
+int tcm_loop_is_state_remove(struct se_cmd *se_cmd)
+{
+ /*
+ * Assume struct scsi_cmnd is not in remove state..
+ */
+ return 0;
+}
+
+int tcm_loop_sess_logged_in(struct se_session *se_sess)
+{
+ /*
+ * Assume that TL Nexus is always active
+ */
+ return 1;
+}
+
+u32 tcm_loop_sess_get_index(struct se_session *se_sess)
+{
+ return 1;
+}
+
+void tcm_loop_set_default_node_attributes(struct se_node_acl *se_acl)
+{
+ return;
+}
+
+u32 tcm_loop_get_task_tag(struct se_cmd *se_cmd)
+{
+ return 1;
+}
+
+int tcm_loop_get_cmd_state(struct se_cmd *se_cmd)
+{
+ struct tcm_loop_cmd *tl_cmd = container_of(se_cmd,
+ struct tcm_loop_cmd, tl_se_cmd);
+
+ return tl_cmd->sc_cmd_state;
+}
+
+int tcm_loop_shutdown_session(struct se_session *se_sess)
+{
+ return 0;
+}
+
+void tcm_loop_close_session(struct se_session *se_sess)
+{
+ return;
+};
+
+
+void tcm_loop_stop_session(
+ struct se_session *se_sess,
+ int sess_sleep,
+ int conn_sleep)
+{
+ return;
+}
+
+
+void tcm_loop_fall_back_to_erl0(struct se_session *se_sess)
+{
+ return;
+}
+
+int tcm_loop_write_pending(struct se_cmd *se_cmd)
+{
+ /*
+ * Since Linux/SCSI has already sent down a struct scsi_cmnd
+ * sc->sc_data_direction of DMA_TO_DEVICE with struct scatterlist array
+ * memory, and memory has already been mapped to struct se_cmd->t_mem_list
+ * format with transport_generic_map_mem_to_cmd().
+ *
+ * We now tell TCM to add this WRITE CDB directly into the TCM storage
+ * object execution queue.
+ */
+ transport_generic_process_write(se_cmd);
+ return 0;
+}
+
+int tcm_loop_write_pending_status(struct se_cmd *se_cmd)
+{
+ return 0;
+}
+
+int tcm_loop_queue_data_in(struct se_cmd *se_cmd)
+{
+ struct tcm_loop_cmd *tl_cmd = container_of(se_cmd,
+ struct tcm_loop_cmd, tl_se_cmd);
+ struct scsi_cmnd *sc = tl_cmd->sc;
+
+ TL_CDB_DEBUG( "tcm_loop_queue_data_in() called for scsi_cmnd: %p"
+ " cdb: 0x%02x\n", sc, sc->cmnd[0]);
+
+ sc->result = host_byte(DID_OK) | SAM_STAT_GOOD;
+ (*sc->scsi_done)(sc);
+ return 0;
+}
+
+int tcm_loop_queue_status(struct se_cmd *se_cmd)
+{
+ struct tcm_loop_cmd *tl_cmd = container_of(se_cmd,
+ struct tcm_loop_cmd, tl_se_cmd);
+ struct scsi_cmnd *sc = tl_cmd->sc;
+
+ TL_CDB_DEBUG("tcm_loop_queue_status() called for scsi_cmnd: %p"
+ " cdb: 0x%02x\n", sc, sc->cmnd[0]);
+
+ if (se_cmd->sense_buffer &&
+ ((se_cmd->se_cmd_flags & SCF_TRANSPORT_TASK_SENSE) ||
+ (se_cmd->se_cmd_flags & SCF_EMULATED_TASK_SENSE))) {
+
+ memcpy((void *)sc->sense_buffer, (void *)se_cmd->sense_buffer,
+ SCSI_SENSE_BUFFERSIZE);
+ sc->result = host_byte(DID_OK) | driver_byte(DRIVER_SENSE) |
+ SAM_STAT_CHECK_CONDITION;
+ } else
+ sc->result = host_byte(DID_OK) | se_cmd->scsi_status;
+
+ (*sc->scsi_done)(sc);
+ return 0;
+}
+
+int tcm_loop_queue_tm_rsp(struct se_cmd *se_cmd)
+{
+ struct se_tmr_req *se_tmr = se_cmd->se_tmr_req;
+ struct tcm_loop_tmr *tl_tmr = (struct tcm_loop_tmr *)se_tmr->fabric_tmr_ptr;
+ /*
+ * The SCSI EH thread will be sleeping on se_tmr->tl_tmr_wait, go ahead
+ * and wake up the wait_queue_head_t in tcm_loop_device_reset()
+ */
+ atomic_set(&tl_tmr->tmr_complete, 1);
+ wake_up(&tl_tmr->tl_tmr_wait);
+ return 0;
+}
+
+u16 tcm_loop_set_fabric_sense_len(struct se_cmd *se_cmd, u32 sense_length)
+{
+ return 0;
+}
+
+u16 tcm_loop_get_fabric_sense_len(void)
+{
+ return 0;
+}
+
+u64 tcm_loop_pack_lun(unsigned int lun)
+{
+ u64 result;
+
+ /* LSB of lun into byte 1 big-endian */
+ result = ((lun & 0xff) << 8);
+ /* use flat space addressing method */
+ result |= 0x40 | ((lun >> 8) & 0x3f);
+
+ return cpu_to_le64(result);
+}
+
+static int __init tcm_loop_fabric_init(void)
+{
+ int ret;
+
+ tcm_loop_cmd_cache = kmem_cache_create("tcm_loop_cmd_cache",
+ sizeof(struct tcm_loop_cmd),
+ __alignof__(struct tcm_loop_cmd),
+ 0, NULL);
+ if (!(tcm_loop_cmd_cache)) {
+ printk(KERN_ERR "kmem_cache_create() for"
+ " tcm_loop_cmd_cache failed\n");
+ return -1;
+ }
+
+ ret = tcm_loop_alloc_core_bus();
+ if (ret)
+ return ret;
+
+ ret = tcm_loop_register_configfs();
+ if (ret) {
+ tcm_loop_release_core_bus();
+ return ret;
+ }
+
+ return 0;
+}
+
+static void tcm_loop_fabric_exit(void)
+{
+ tcm_loop_deregister_configfs();
+ tcm_loop_release_core_bus();
+ kmem_cache_destroy(tcm_loop_cmd_cache);
+}
+
+#ifdef MODULE
+MODULE_DESCRIPTION("TCM loopback virtual Linux/SCSI fabric module");
+MODULE_AUTHOR("Nicholas A. Bellinger <nab@Linux-iSCSI.org>");
+MODULE_LICENSE("GPL");
+module_init(tcm_loop_fabric_init);
+module_exit(tcm_loop_fabric_exit);
+#endif /* MODULE */
diff --git a/drivers/target/tcm_loop/tcm_loop_fabric.h b/drivers/target/tcm_loop/tcm_loop_fabric.h
new file mode 100644
index 0000000..45af1f9
--- /dev/null
+++ b/drivers/target/tcm_loop/tcm_loop_fabric.h
@@ -0,0 +1,40 @@
+extern char *tcm_loop_get_fabric_name(void);
+extern u8 tcm_loop_get_fabric_proto_ident(struct se_portal_group *);
+extern char *tcm_loop_get_endpoint_wwn(struct se_portal_group *);
+extern u16 tcm_loop_get_tag(struct se_portal_group *);
+extern u32 tcm_loop_get_default_depth(struct se_portal_group *);
+extern u32 tcm_loop_get_pr_transport_id(struct se_portal_group *, struct se_node_acl *,
+ struct t10_pr_registration *, int *,
+ unsigned char *);
+extern u32 tcm_loop_get_pr_transport_id_len(struct se_portal_group *,
+ struct se_node_acl *, struct t10_pr_registration *,
+ int *);
+extern char *tcm_loop_parse_pr_out_transport_id(struct se_portal_group *,
+ const char *, u32 *, char **);
+extern int tcm_loop_check_demo_mode(struct se_portal_group *);
+extern int tcm_loop_check_demo_mode_cache(struct se_portal_group *);
+extern int tcm_loop_check_demo_mode_write_protect(struct se_portal_group *);
+extern int tcm_loop_check_prod_mode_write_protect(struct se_portal_group *);
+extern struct se_node_acl *tcm_loop_tpg_alloc_fabric_acl(
+ struct se_portal_group *);
+void tcm_loop_tpg_release_fabric_acl(struct se_portal_group *, struct se_node_acl *);
+extern u32 tcm_loop_get_inst_index(struct se_portal_group *);
+extern void tcm_loop_new_cmd_failure(struct se_cmd *);
+extern int tcm_loop_is_state_remove(struct se_cmd *);
+extern int tcm_loop_sess_logged_in(struct se_session *);
+extern u32 tcm_loop_sess_get_index(struct se_session *);
+extern void tcm_loop_set_default_node_attributes(struct se_node_acl *);
+extern u32 tcm_loop_get_task_tag(struct se_cmd *);
+extern int tcm_loop_get_cmd_state(struct se_cmd *);
+extern int tcm_loop_shutdown_session(struct se_session *);
+extern void tcm_loop_close_session(struct se_session *);
+extern void tcm_loop_stop_session(struct se_session *, int, int);
+extern void tcm_loop_fall_back_to_erl0(struct se_session *);
+extern int tcm_loop_write_pending(struct se_cmd *);
+extern int tcm_loop_write_pending_status(struct se_cmd *);
+extern int tcm_loop_queue_data_in(struct se_cmd *);
+extern int tcm_loop_queue_status(struct se_cmd *);
+extern int tcm_loop_queue_tm_rsp(struct se_cmd *);
+extern u16 tcm_loop_set_fabric_sense_len(struct se_cmd *, u32);
+extern u16 tcm_loop_get_fabric_sense_len(void);
+extern u64 tcm_loop_pack_lun(unsigned int);
diff --git a/drivers/target/tcm_loop/tcm_loop_fabric_scsi.c b/drivers/target/tcm_loop/tcm_loop_fabric_scsi.c
new file mode 100644
index 0000000..2e570f3
--- /dev/null
+++ b/drivers/target/tcm_loop/tcm_loop_fabric_scsi.c
@@ -0,0 +1,605 @@
+/*******************************************************************************
+ * Filename: tcm_loop_fabric_scsi.c
+ *
+ * This file contains the Linux/SCSI LLD virtual SCSI initiator driver
+ * for emulated SAS initiator ports
+ *
+ * Copyright (c) 2009-2010 Rising Tide, Inc.
+ * Copyright (c) 2009-2010 Linux-iSCSI.org
+ *
+ * Copyright (c) 2009-2010 Nicholas A. Bellinger <nab@linux-iscsi.org>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ ****************************************************************************/
+
+#include <linux/module.h>
+#include <linux/moduleparam.h>
+#include <linux/version.h>
+#include <generated/utsrelease.h>
+#include <linux/utsname.h>
+#include <linux/init.h>
+#include <linux/slab.h>
+#include <linux/types.h>
+#include <linux/string.h>
+#include <scsi/scsi.h>
+#include <scsi/scsi_tcq.h>
+#include <scsi/scsi_host.h>
+#include <scsi/scsi_device.h>
+#include <scsi/scsi_cmnd.h>
+#include <scsi/libsas.h> /* For TASK_ATTR_* */
+
+#include <target/target_core_base.h>
+#include <target/target_core_transport.h>
+#include <target/target_core_fabric_ops.h>
+#include <target/target_core_device.h>
+#include <target/target_core_tpg.h>
+#include <target/target_core_tmr.h>
+
+#include <tcm_loop_core.h>
+#include <tcm_loop_fabric.h>
+#include <tcm_loop_fabric_scsi.h>
+
+#define to_tcm_loop_hba(hba) container_of(hba, struct tcm_loop_hba, dev)
+
+/*
+ * Allocate a tcm_loop cmd descriptor from target_core_mod code
+ *
+ * Can be called from interrupt context in tcm_loop_queuecommand() below
+ */
+static struct se_cmd *tcm_loop_allocate_core_cmd(
+ struct tcm_loop_hba *tl_hba,
+ struct se_portal_group *se_tpg,
+ struct scsi_cmnd *sc)
+{
+ struct se_cmd *se_cmd;
+ struct se_session *se_sess;
+ struct tcm_loop_nexus *tl_nexus = tl_hba->tl_nexus;
+ struct tcm_loop_cmd *tl_cmd;
+ int sam_task_attr;
+
+ if (!(tl_nexus)) {
+ scmd_printk(KERN_ERR, sc, "TCM_Loop I_T Nexus"
+ " does not exist\n");
+ return NULL;
+ }
+ se_sess = tl_nexus->se_sess;
+
+ tl_cmd = kmem_cache_zalloc(tcm_loop_cmd_cache, GFP_ATOMIC);
+ if (!(tl_cmd)) {
+ printk(KERN_ERR "Unable to allocate struct tcm_loop_cmd\n");
+ return NULL;
+ }
+ se_cmd = &tl_cmd->tl_se_cmd;
+ /*
+ * Save the pointer to struct scsi_cmnd *sc
+ */
+ tl_cmd->sc = sc;
+ /*
+ * Locate the SAM Task Attr from struct scsi_cmnd *
+ */
+ if (sc->device->tagged_supported) {
+ switch (sc->tag) {
+ case HEAD_OF_QUEUE_TAG:
+ sam_task_attr = TASK_ATTR_HOQ;
+ break;
+ case ORDERED_QUEUE_TAG:
+ sam_task_attr = TASK_ATTR_ORDERED;
+ break;
+ default:
+ sam_task_attr = TASK_ATTR_SIMPLE;
+ break;
+ }
+ } else
+ sam_task_attr = TASK_ATTR_SIMPLE;
+
+ /*
+ * Initialize struct se_cmd descriptor from target_core_mod infrastructure
+ */
+ transport_init_se_cmd(se_cmd, se_tpg->se_tpg_tfo, se_sess,
+ scsi_bufflen(sc), sc->sc_data_direction, sam_task_attr,
+ &tl_cmd->tl_sense_buf[0]);
+
+ /*
+ * Signal BIDI usage with T_TASK(cmd)->t_tasks_bidi
+ */
+ if (scsi_bidi_cmnd(sc))
+ T_TASK(se_cmd)->t_tasks_bidi = 1;
+ /*
+ * Locate the struct se_lun pointer and attach it to struct se_cmd
+ */
+ if (transport_get_lun_for_cmd(se_cmd, NULL,
+ tl_cmd->sc->device->lun) < 0) {
+ /* NON_EXISTENT_LUN */
+ transport_send_check_condition_and_sense(se_cmd,
+ se_cmd->scsi_sense_reason, 0);
+ return 0;
+ }
+
+ transport_device_setup_cmd(se_cmd);
+ return se_cmd;
+}
+
+/*
+ * Called by struct target_core_fabric_ops->new_cmd_map()
+ *
+ * Always called in process context. A non zero return value
+ * here will signal to handle an exception based on the return code.
+ */
+int tcm_loop_new_cmd_map(struct se_cmd *se_cmd)
+{
+ struct tcm_loop_cmd *tl_cmd = container_of(se_cmd,
+ struct tcm_loop_cmd, tl_se_cmd);
+ struct scsi_cmnd *sc = tl_cmd->sc;
+ void *mem_ptr, *mem_bidi_ptr = NULL;
+ u32 sg_no_bidi = 0;
+ int ret;
+ /*
+ * Allocate the necessary tasks to complete the received CDB+data
+ */
+ ret = transport_generic_allocate_tasks(se_cmd, tl_cmd->sc->cmnd);
+ if (ret == -1) {
+ /* Out of Resources */
+ return PYX_TRANSPORT_LU_COMM_FAILURE;
+ } else if (ret == -2) {
+ /*
+ * Handle case for SAM_STAT_RESERVATION_CONFLICT
+ */
+ if (se_cmd->se_cmd_flags & SCF_SCSI_RESERVATION_CONFLICT)
+ return PYX_TRANSPORT_RESERVATION_CONFLICT;
+ /*
+ * Otherwise, return SAM_STAT_CHECK_CONDITION and return
+ * sense data.
+ */
+ return PYX_TRANSPORT_USE_SENSE_REASON;
+ }
+ /*
+ * Setup the struct scatterlist memory from the received
+ * struct scsi_cmnd.
+ */
+ if (scsi_sg_count(sc)) {
+ se_cmd->se_cmd_flags |= SCF_PASSTHROUGH_SG_TO_MEM;
+ mem_ptr = (void *)scsi_sglist(sc);
+ /*
+ * For BIDI commands, pass in the extra READ buffer
+ * to transport_generic_map_mem_to_cmd() below..
+ */
+ if (T_TASK(se_cmd)->t_tasks_bidi) {
+ struct scsi_data_buffer *sdb = scsi_in(sc);
+
+ mem_bidi_ptr = (void *)sdb->table.sgl;
+ sg_no_bidi = sdb->table.nents;
+ }
+ } else {
+ /*
+ * Used for DMA_NONE
+ */
+ mem_ptr = NULL;
+ }
+ /*
+ * Map the SG memory into struct se_mem->page linked list using the same
+ * physical memory at sg->page_link.
+ */
+ ret = transport_generic_map_mem_to_cmd(se_cmd, mem_ptr,
+ scsi_sg_count(sc), mem_bidi_ptr, sg_no_bidi);
+ if (ret < 0)
+ return PYX_TRANSPORT_LU_COMM_FAILURE;
+
+ return 0;
+}
+
+/*
+ * Called from struct target_core_fabric_ops->check_stop_free()
+ */
+void tcm_loop_check_stop_free(struct se_cmd *se_cmd)
+{
+ /*
+ * Do not release struct se_cmd's containing a valid TMR
+ * pointer. These will be released directly in tcm_loop_device_reset()
+ * with transport_generic_free_cmd().
+ */
+ if (se_cmd->se_tmr_req)
+ return;
+ /*
+ * Release the struct se_cmd, which will make a callback to release
+ * struct tcm_loop_cmd * in tcm_loop_deallocate_core_cmd()
+ */
+ transport_generic_free_cmd(se_cmd, 0, 1, 0);
+}
+
+/*
+ * Called from struct target_core_fabric_ops->release_cmd_to_pool()
+ */
+void tcm_loop_deallocate_core_cmd(struct se_cmd *se_cmd)
+{
+ struct tcm_loop_cmd *tl_cmd = container_of(se_cmd,
+ struct tcm_loop_cmd, tl_se_cmd);
+
+ kmem_cache_free(tcm_loop_cmd_cache, tl_cmd);
+}
+
+void tcm_loop_scsi_forget_host(struct Scsi_Host *shost)
+{
+ struct scsi_device *sdev, *tmp;
+ unsigned long flags;
+
+ spin_lock_irqsave(shost->host_lock, flags);
+ list_for_each_entry_safe(sdev, tmp, &shost->__devices, siblings) {
+ spin_unlock_irqrestore(shost->host_lock, flags);
+ scsi_remove_device(sdev);
+ spin_lock_irqsave(shost->host_lock, flags);
+ }
+ spin_unlock_irqrestore(shost->host_lock, flags);
+}
+
+static int tcm_loop_proc_info(struct Scsi_Host *host, char *buffer,
+ char **start, off_t offset,
+ int length, int inout)
+{
+ return sprintf(buffer, "tcm_loop_proc_info()\n");
+}
+
+static int tcm_loop_driver_probe(struct device *);
+static int tcm_loop_driver_remove(struct device *);
+
+static int pseudo_lld_bus_match(struct device *dev,
+ struct device_driver *dev_driver)
+{
+ return 1;
+}
+
+static struct bus_type tcm_loop_lld_bus = {
+ .name = "tcm_loop_bus",
+ .match = pseudo_lld_bus_match,
+ .probe = tcm_loop_driver_probe,
+ .remove = tcm_loop_driver_remove,
+};
+
+static struct device_driver tcm_loop_driverfs = {
+ .name = "tcm_loop",
+ .bus = &tcm_loop_lld_bus,
+};
+/*
+ * Used with root_device_register() in tcm_loop_alloc_core_bus() below
+ */
+struct device *tcm_loop_primary;
+
+/*
+ * Copied from drivers/scsi/libfc/fc_fcp.c:fc_change_queue_depth() and
+ * drivers/scsi/libiscsi.c:iscsi_change_queue_depth()
+ */
+static int tcm_loop_change_queue_depth(
+ struct scsi_device *sdev,
+ int depth,
+ int reason)
+{
+ switch (reason) {
+ case SCSI_QDEPTH_DEFAULT:
+ scsi_adjust_queue_depth(sdev, scsi_get_tag_type(sdev), depth);
+ break;
+ case SCSI_QDEPTH_QFULL:
+ scsi_track_queue_full(sdev, depth);
+ break;
+ case SCSI_QDEPTH_RAMP_UP:
+ scsi_adjust_queue_depth(sdev, scsi_get_tag_type(sdev), depth);
+ break;
+ default:
+ return -EOPNOTSUPP;
+ }
+ return sdev->queue_depth;
+}
+
+static inline struct tcm_loop_hba *tcm_loop_get_hba(struct scsi_cmnd *sc)
+{
+ return (struct tcm_loop_hba *)sc->device->host->hostdata[0];
+}
+
+/*
+ * Main entry point from struct scsi_host_template for incoming SCSI CDB+Data
+ * from Linux/SCSI subsystem for SCSI low level device drivers (LLDs)
+ */
+static int tcm_loop_queuecommand(
+ struct Scsi_Host *sh,
+ struct scsi_cmnd *sc)
+{
+ struct se_cmd *se_cmd;
+ struct se_portal_group *se_tpg;
+ struct tcm_loop_hba *tl_hba;
+ struct tcm_loop_tpg *tl_tpg;
+
+ TL_CDB_DEBUG("tcm_loop_queuecommand() %d:%d:%d:%d got CDB: 0x%02x"
+ " scsi_buf_len: %u\n", sc->device->host->host_no,
+ sc->device->id, sc->device->channel, sc->device->lun,
+ sc->cmnd[0], scsi_bufflen(sc));
+ /*
+ * Locate the tcm_loop_hba_t pointer
+ */
+ tl_hba = tcm_loop_get_hba(sc);
+ if (!(tl_hba)) {
+ printk(KERN_ERR "Unable to locate struct tcm_loop_hba from"
+ " struct scsi_cmnd\n");
+ sc->result = host_byte(DID_ERROR);
+ sc->scsi_done(sc);
+ return 0;
+ }
+ tl_tpg = &tl_hba->tl_hba_tpgs[sc->device->id];
+ se_tpg = &tl_tpg->tl_se_tpg;
+ /*
+ * Determine the SAM Task Attribute and allocate tl_cmd and
+ * tl_cmd->tl_se_cmd from TCM infrastructure
+ */
+ se_cmd = tcm_loop_allocate_core_cmd(tl_hba, se_tpg, sc);
+ if (!(se_cmd)) {
+ sc->result = host_byte(DID_ERROR);
+ sc->scsi_done(sc);
+ return 0;
+ }
+ /*
+ * Queue up the newly allocated to be processed in TCM thread context.
+ */
+ transport_generic_handle_cdb_map(se_cmd);
+ return 0;
+}
+
+/*
+ * Called from SCSI EH process context to issue a LUN_RESET TMR
+ * to struct scsi_device
+ */
+static int tcm_loop_device_reset(struct scsi_cmnd *sc)
+{
+ struct se_cmd *se_cmd = NULL;
+ struct se_portal_group *se_tpg;
+ struct se_session *se_sess;
+ struct tcm_loop_cmd *tl_cmd = NULL;
+ struct tcm_loop_hba *tl_hba;
+ struct tcm_loop_nexus *tl_nexus;
+ struct tcm_loop_tmr *tl_tmr = NULL;
+ struct tcm_loop_tpg *tl_tpg;
+ int ret = FAILED;
+ /*
+ * Locate the tcm_loop_hba_t pointer
+ */
+ tl_hba = tcm_loop_get_hba(sc);
+ if (!(tl_hba)) {
+ printk(KERN_ERR "Unable to locate struct tcm_loop_hba from"
+ " struct scsi_cmnd\n");
+ return FAILED;
+ }
+ /*
+ * Locate the tl_nexus and se_sess pointers
+ */
+ tl_nexus = tl_hba->tl_nexus;
+ if (!(tl_nexus)) {
+ printk(KERN_ERR "Unable to perform device reset without"
+ " active I_T Nexus\n");
+ return FAILED;
+ }
+ se_sess = tl_nexus->se_sess;
+ /*
+ * Locate the tl_tpg and se_tpg pointers from TargetID in sc->device->id
+ */
+ tl_tpg = &tl_hba->tl_hba_tpgs[sc->device->id];
+ se_tpg = &tl_tpg->tl_se_tpg;
+
+ tl_cmd = kmem_cache_zalloc(tcm_loop_cmd_cache, GFP_KERNEL);
+ if (!(tl_cmd)) {
+ printk(KERN_ERR "Unable to allocate memory for tl_cmd\n");
+ return FAILED;
+ }
+
+ tl_tmr = kzalloc(sizeof(struct tcm_loop_tmr), GFP_KERNEL);
+ if (!(tl_tmr)) {
+ printk(KERN_ERR "Unable to allocate memory for tl_tmr\n");
+ goto release;
+ }
+ init_waitqueue_head(&tl_tmr->tl_tmr_wait);
+
+ se_cmd = &tl_cmd->tl_se_cmd;
+ /*
+ * Initialize struct se_cmd descriptor from target_core_mod infrastructure
+ */
+ transport_init_se_cmd(se_cmd, se_tpg->se_tpg_tfo, se_sess, 0,
+ DMA_NONE, TASK_ATTR_SIMPLE,
+ &tl_cmd->tl_sense_buf[0]);
+ /*
+ * Allocate the LUN_RESET TMR
+ */
+ se_cmd->se_tmr_req = core_tmr_alloc_req(se_cmd, (void *)tl_tmr,
+ LUN_RESET);
+ if (!(se_cmd->se_tmr_req))
+ goto release;
+ /*
+ * Locate the underlying TCM struct se_lun from sc->device->lun
+ */
+ if (transport_get_lun_for_tmr(se_cmd, sc->device->lun) < 0)
+ goto release;
+ /*
+ * Queue the TMR to TCM Core and sleep waiting for tcm_loop_queue_tm_rsp()
+ * to wake us up.
+ */
+ transport_generic_handle_tmr(se_cmd);
+ wait_event(tl_tmr->tl_tmr_wait, atomic_read(&tl_tmr->tmr_complete));
+ /*
+ * The TMR LUN_RESET has completed, check the response status and
+ * then release allocations.
+ */
+ ret = (se_cmd->se_tmr_req->response == TMR_FUNCTION_COMPLETE) ?
+ SUCCESS : FAILED;
+release:
+ if (se_cmd)
+ transport_generic_free_cmd(se_cmd, 1, 1, 0);
+ else
+ kmem_cache_free(tcm_loop_cmd_cache, tl_cmd);
+ kfree(tl_tmr);
+ return ret;
+}
+
+static int tcm_loop_slave_alloc(struct scsi_device *sd)
+{
+ set_bit(QUEUE_FLAG_BIDI, &sd->request_queue->queue_flags);
+ return 0;
+}
+
+static int tcm_loop_slave_configure(struct scsi_device *sd)
+{
+ return 0;
+}
+
+static struct scsi_host_template tcm_loop_driver_template = {
+ .proc_info = tcm_loop_proc_info,
+ .proc_name = "tcm_loopback",
+ .name = "TCM_Loopback",
+ .info = NULL,
+ .slave_alloc = NULL,
+ .slave_configure = NULL,
+ .slave_destroy = NULL,
+ .ioctl = NULL,
+ .queuecommand = tcm_loop_queuecommand,
+ .change_queue_depth = tcm_loop_change_queue_depth,
+ .eh_abort_handler = NULL,
+ .eh_bus_reset_handler = NULL,
+ .eh_device_reset_handler = tcm_loop_device_reset,
+ .eh_host_reset_handler = NULL,
+ .bios_param = NULL,
+ .can_queue = TL_SCSI_CAN_QUEUE,
+ .this_id = -1,
+ .sg_tablesize = TL_SCSI_SG_TABLESIZE,
+ .cmd_per_lun = TL_SCSI_CMD_PER_LUN,
+ .max_sectors = TL_SCSI_MAX_SECTORS,
+ .use_clustering = DISABLE_CLUSTERING,
+ .slave_alloc = tcm_loop_slave_alloc,
+ .slave_configure = tcm_loop_slave_configure,
+ .module = THIS_MODULE,
+};
+
+static int tcm_loop_driver_probe(struct device *dev)
+{
+ struct tcm_loop_hba *tl_hba;
+ struct Scsi_Host *sh;
+ int error;
+
+ tl_hba = to_tcm_loop_hba(dev);
+
+ sh = scsi_host_alloc(&tcm_loop_driver_template,
+ sizeof(struct tcm_loop_hba));
+ if (!(sh)) {
+ printk(KERN_ERR "Unable to allocate struct scsi_host\n");
+ return -ENODEV;
+ }
+ tl_hba->sh = sh;
+
+ /*
+ * Assign the struct tcm_loop_hba pointer to struct Scsi_Host->hostdata
+ */
+ sh->hostdata[0] = (unsigned long)tl_hba;
+ /*
+ * Setup single ID, Channel and LUN for now..
+ */
+ sh->max_id = 2;
+ sh->max_lun = 0;
+ sh->max_channel = 0;
+ sh->max_cmd_len = TL_SCSI_MAX_CMD_LEN;
+
+ error = scsi_add_host(sh, &tl_hba->dev);
+ if (error) {
+ printk(KERN_ERR "%s: scsi_add_host failed\n", __func__);
+ scsi_host_put(sh);
+ return -ENODEV;
+ }
+ return 0;
+}
+
+static int tcm_loop_driver_remove(struct device *dev)
+{
+ struct tcm_loop_hba *tl_hba;
+ struct Scsi_Host *sh;
+
+ tl_hba = to_tcm_loop_hba(dev);
+ sh = tl_hba->sh;
+
+ scsi_remove_host(sh);
+ scsi_host_put(sh);
+ return 0;
+}
+
+static void tcm_loop_release_adapter(struct device *dev)
+{
+ struct tcm_loop_hba *tl_hba = to_tcm_loop_hba(dev);
+
+ kfree(tl_hba);
+}
+
+/*
+ * Called from tcm_loop_make_scsi_hba() in tcm_loop_configfs.c
+ */
+int tcm_loop_setup_hba_bus(struct tcm_loop_hba *tl_hba, int tcm_loop_host_id)
+{
+ int ret;
+
+ tl_hba->dev.bus = &tcm_loop_lld_bus;
+ tl_hba->dev.parent = tcm_loop_primary;
+ tl_hba->dev.release = &tcm_loop_release_adapter;
+ dev_set_name(&tl_hba->dev, "tcm_loop_adapter_%d", tcm_loop_host_id);
+
+ ret = device_register(&tl_hba->dev);
+ if (ret) {
+ printk(KERN_ERR "device_register() failed for"
+ " tl_hba->dev: %d\n", ret);
+ return -ENODEV;
+ }
+
+ return 0;
+}
+
+/*
+ * Called from tcm_loop_fabric_init() in tcl_loop_fabric.c to load the emulated
+ * tcm_loop SCSI bus.
+ */
+int tcm_loop_alloc_core_bus(void)
+{
+ int ret;
+
+ tcm_loop_primary = root_device_register("tcm_loop_0");
+ if (IS_ERR(tcm_loop_primary)) {
+ printk(KERN_ERR "Unable to allocate tcm_loop_primary\n");
+ return PTR_ERR(tcm_loop_primary);
+ }
+
+ ret = bus_register(&tcm_loop_lld_bus);
+ if (ret) {
+ printk(KERN_ERR "bus_register() failed for tcm_loop_lld_bus\n");
+ goto dev_unreg;
+ }
+
+ ret = driver_register(&tcm_loop_driverfs);
+ if (ret) {
+ printk(KERN_ERR "driver_register() failed for"
+ "tcm_loop_driverfs\n");
+ goto bus_unreg;
+ }
+
+ printk(KERN_INFO "Initialized TCM Loop Core Bus\n");
+ return ret;
+
+bus_unreg:
+ bus_unregister(&tcm_loop_lld_bus);
+dev_unreg:
+ root_device_unregister(tcm_loop_primary);
+ return ret;
+}
+
+void tcm_loop_release_core_bus(void)
+{
+ driver_unregister(&tcm_loop_driverfs);
+ bus_unregister(&tcm_loop_lld_bus);
+ root_device_unregister(tcm_loop_primary);
+
+ printk(KERN_INFO "Releasing TCM Loop Core BUS\n");
+}
diff --git a/drivers/target/tcm_loop/tcm_loop_fabric_scsi.h b/drivers/target/tcm_loop/tcm_loop_fabric_scsi.h
new file mode 100644
index 0000000..bcba89b
--- /dev/null
+++ b/drivers/target/tcm_loop/tcm_loop_fabric_scsi.h
@@ -0,0 +1,10 @@
+extern struct kmem_cache *tcm_loop_cmd_cache;
+
+extern int tcm_loop_new_cmd_map(struct se_cmd *);
+extern void tcm_loop_check_stop_free(struct se_cmd *);
+extern void tcm_loop_deallocate_core_cmd(struct se_cmd *);
+extern void tcm_loop_scsi_forget_host(struct Scsi_Host *);
+extern void tcm_loop_deallocate_core_cmd(struct se_cmd *);
+extern int tcm_loop_setup_hba_bus(struct tcm_loop_hba *, int);
+extern int tcm_loop_alloc_core_bus(void);
+extern void tcm_loop_release_core_bus(void);
--
1.7.3.4
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