* [PATCH 2/10][RFC] linux-iscsi driver
@ 2005-01-10 22:56 Mike Christie
0 siblings, 0 replies; only message in thread
From: Mike Christie @ 2005-01-10 22:56 UTC (permalink / raw)
To: linux-scsi
[-- Attachment #1: Type: text/plain, Size: 149 bytes --]
Attached patch moves definitions found in the iscsi spec to
a file that could be used by other iscsi drivers including
sofware iscsi target drivers.
[-- Attachment #2: 02-common-iscsi-hdr.patch --]
[-- Type: text/x-patch, Size: 11927 bytes --]
diff -Naurp scsi-misc-2.6.orig/include/scsi/iscsi.h scsi-misc-2.6.test/include/scsi/iscsi.h
--- scsi-misc-2.6.orig/include/scsi/iscsi.h 1969-12-31 16:00:00.000000000 -0800
+++ scsi-misc-2.6.test/include/scsi/iscsi.h 2005-01-10 10:39:17.000000000 -0800
@@ -0,0 +1,514 @@
+/*
+ * Constants and structures defined in the iSCSI RFC.
+ */
+#ifndef ISCSI_H_
+#define ISCSI_H_
+
+#include <linux/types.h>
+
+#define ISCSI_DRAFT20_VERSION 0x00
+
+/* TCP port for iSCSI connections assigned by IANA */
+#define ISCSI_TCP_PORT 3260
+
+/* Reserved value for initiator/target task tag */
+#define ISCSI_RSVD_TASK_TAG 0xffffffff
+
+/* most PDU types have a final bit */
+#define ISCSI_FLAG_FINAL 0x80
+
+/* iSCSI Template Header */
+struct iscsi_hdr {
+ __u8 opcode;
+ __u8 flags; /* Final bit */
+ __u8 rsvd2[2];
+ __u8 hlength; /* AHSs total length */
+ __u8 dlength[3]; /* Data length */
+ __u8 lun[8];
+ __u32 itt;
+ __u8 other[28];
+};
+
+/* Opcode encoding bits */
+#define ISCSI_OP_RETRY 0x80
+#define ISCSI_OP_IMMEDIATE 0x40
+#define ISCSI_OPCODE_MASK 0x3F
+
+/* Client to Server Message Opcode values */
+#define ISCSI_OP_NOOP_OUT 0x00
+#define ISCSI_OP_SCSI_CMD 0x01
+#define ISCSI_OP_TASK_MGT_REQ 0x02
+#define ISCSI_OP_LOGIN_CMD 0x03
+#define ISCSI_OP_TEXT_CMD 0x04
+#define ISCSI_OP_SCSI_DATA 0x05
+#define ISCSI_OP_LOGOUT_CMD 0x06
+#define ISCSI_OP_SNACK_CMD 0x10
+
+/* Server to Client Message Opcode values */
+#define ISCSI_OP_NOOP_IN 0x20
+#define ISCSI_OP_SCSI_RSP 0x21
+#define ISCSI_OP_SCSI_TASK_MGT_RSP 0x22
+#define ISCSI_OP_LOGIN_RSP 0x23
+#define ISCSI_OP_TEXT_RSP 0x24
+#define ISCSI_OP_SCSI_DATA_RSP 0x25
+#define ISCSI_OP_LOGOUT_RSP 0x26
+#define ISCSI_OP_R2T 0x31
+#define ISCSI_OP_ASYNC_MSG 0x32
+#define ISCSI_OP_REJECT 0x3f
+
+/* SCSI Command Header */
+struct iscsi_scsi_cmd_hdr {
+ __u8 opcode;
+ __u8 flags;
+ __u8 rsvd2;
+ __u8 cmdrn;
+ __u8 hlength;
+ __u8 dlength[3];
+ __u8 lun[8];
+ __u32 itt;
+ __u32 data_length;
+ __u32 cmdsn;
+ __u32 expstatsn;
+ __u8 scb[16]; /* SCSI Command Block */
+ /* Additional Data (Command Dependent) */
+};
+
+/* Command PDU flags */
+#define ISCSI_FLAG_CMD_READ 0x40
+#define ISCSI_FLAG_CMD_WRITE 0x20
+#define ISCSI_FLAG_CMD_ATTR_MASK 0x07 /* 3 bits */
+
+/* SCSI Command Attribute values */
+#define ISCSI_ATTR_UNTAGGED 0
+#define ISCSI_ATTR_SIMPLE 1
+#define ISCSI_ATTR_ORDERED 2
+#define ISCSI_ATTR_HEAD_OF_QUEUE 3
+#define ISCSI_ATTR_ACA 4
+
+/* SCSI Response Header */
+struct iscsi_scsi_rsp_hdr {
+ __u8 opcode;
+ __u8 flags;
+ __u8 response;
+ __u8 cmd_status;
+ __u8 hlength;
+ __u8 dlength[3];
+ __u8 rsvd[8];
+ __u32 itt;
+ __u32 rsvd1;
+ __u32 statsn;
+ __u32 expcmdsn;
+ __u32 maxcmdsn;
+ __u32 expdatasn;
+ __u32 bi_residual_count;
+ __u32 residual_count;
+ /* Response or Sense Data (optional) */
+};
+
+/* Command Response PDU flags */
+#define ISCSI_FLAG_CMD_BIDI_OVERFLOW 0x10
+#define ISCSI_FLAG_CMD_BIDI_UNDERFLOW 0x08
+#define ISCSI_FLAG_CMD_OVERFLOW 0x04
+#define ISCSI_FLAG_CMD_UNDERFLOW 0x02
+
+/* iSCSI Status values. Valid if Rsp Selector bit is not set */
+#define ISCSI_STATUS_CMD_COMPLETED 0
+#define ISCSI_STATUS_TARGET_FAILURE 1
+#define ISCSI_STATUS_SUBSYS_FAILURE 2
+
+/* Asynchronous Message Header */
+struct iscsi_async_msg_hdr {
+ __u8 opcode;
+ __u8 flags;
+ __u8 rsvd2[2];
+ __u8 rsvd3;
+ __u8 dlength[3];
+ __u8 lun[8];
+ __u8 rsvd4[8];
+ __u32 statsn;
+ __u32 expcmdsn;
+ __u32 maxcmdsn;
+ __u8 async_event;
+ __u8 async_vcode;
+ __u16 param1;
+ __u16 param2;
+ __u16 param3;
+ __u8 rsvd5[4];
+};
+
+/* iSCSI Event Codes */
+#define ISCSI_ASYNC_MSG_SCSI_EVENT 0
+#define ISCSI_ASYNC_MSG_REQUEST_LOGOUT 1
+#define ISCSI_ASYNC_MSG_DROPPING_CONNECTION 2
+#define ISCSI_ASYNC_MSG_DROPPING_ALL_CONNECTIONS 3
+#define ISCSI_ASYNC_MSG_PARAM_NEGOTIATION 4
+#define ISCSI_ASYNC_MSG_VENDOR_SPECIFIC 255
+
+/* NOP-Out */
+struct iscsi_nop_out_hdr {
+ __u8 opcode;
+ __u8 flags;
+ __u16 rsvd2;
+ __u8 rsvd3;
+ __u8 dlength[3];
+ __u8 lun[8];
+ __u32 itt;
+ __u32 ttt;
+ __u32 cmdsn;
+ __u32 expstatsn;
+ __u8 rsvd4[16];
+};
+
+/* NOP-In */
+struct iscsi_nop_in_hdr {
+ __u8 opcode;
+ __u8 flags;
+ __u16 rsvd2;
+ __u8 rsvd3;
+ __u8 dlength[3];
+ __u8 lun[8];
+ __u32 itt;
+ __u32 ttt;
+ __u32 statsn;
+ __u32 expcmdsn;
+ __u32 maxcmdsn;
+ __u8 rsvd4[12];
+};
+
+/* SCSI Task Management Request Header */
+struct iscsi_scsi_task_mgmt_hdr {
+ __u8 opcode;
+ __u8 flags;
+ __u8 rsvd1[2];
+ __u8 hlength;
+ __u8 dlength[3];
+ __u8 lun[8];
+ __u32 itt;
+ __u32 rtt;
+ __u32 cmdsn;
+ __u32 expstatsn;
+ __u32 refcmdsn;
+ __u32 expdatasn;
+ __u8 rsvd2[8];
+};
+
+#define ISCSI_FLAG_TMF_MASK 0x7F
+
+/* Function values */
+#define ISCSI_TMF_ABORT_TASK 1
+#define ISCSI_TMF_ABORT_TASK_SET 2
+#define ISCSI_TMF_CLEAR_ACA 3
+#define ISCSI_TMF_CLEAR_TASK_SET 4
+#define ISCSI_TMF_LOGICAL_UNIT_RESET 5
+#define ISCSI_TMF_TARGET_WARM_RESET 6
+#define ISCSI_TMF_TARGET_COLD_RESET 7
+#define ISCSI_TMF_TASK_REASSIGN 8
+
+/* SCSI Task Management Response Header */
+struct iscsi_scsi_task_mgmt_rsp_hdr {
+ __u8 opcode;
+ __u8 flags;
+ __u8 response; /* see Response values below */
+ __u8 qualifier;
+ __u8 hlength;
+ __u8 dlength[3];
+ __u8 rsvd2[8];
+ __u32 itt;
+ __u32 rtt;
+ __u32 statsn;
+ __u32 expcmdsn;
+ __u32 maxcmdsn;
+ __u8 rsvd3[12];
+};
+
+/* Response values */
+#define ISCSI_TMF_RESP_COMPLETE 0x00
+#define ISCSI_TMF_RESP_UNKNOWN_TASK 0x01
+#define ISCSI_TMF_RESP_UNKNOWN_LUN 0x02
+#define ISCSI_TMF_RESP_TASK_ALLEGIANT 0x03
+#define ISCSI_TMF_RESP_NO_FAILOVER 0x04
+#define ISCSI_TMF_RESP_IN_PRGRESS 0x05
+#define ISCSI_TMF_RESP_REJECTED 0xff
+
+/* Ready To Transfer Header */
+struct iscsi_r2t_hdr {
+ __u8 opcode;
+ __u8 flags;
+ __u8 rsvd2[2];
+ __u8 rsvd3[12];
+ __u32 itt;
+ __u32 ttt;
+ __u32 statsn;
+ __u32 expcmdsn;
+ __u32 maxcmdsn;
+ __u32 rttsn;
+ __u32 data_offset;
+ __u32 data_length;
+};
+
+/* SCSI Data Hdr */
+struct iscsi_data_hdr {
+ __u8 opcode;
+ __u8 flags;
+ __u8 rsvd2[2];
+ __u8 rsvd3;
+ __u8 dlength[3];
+ __u8 lun[8];
+ __u32 itt;
+ __u32 ttt;
+ __u32 rsvd4;
+ __u32 expstatsn;
+ __u32 rsvd5;
+ __u32 datasn;
+ __u32 offset;
+ __u32 rsvd6;
+ /* Payload */
+};
+
+/* SCSI Data Response Hdr */
+struct iscsi_data_rsp_hdr {
+ __u8 opcode;
+ __u8 flags;
+ __u8 rsvd2;
+ __u8 cmd_status;
+ __u8 hlength;
+ __u8 dlength[3];
+ __u8 lun[8];
+ __u32 itt;
+ __u32 ttt;
+ __u32 statsn;
+ __u32 expcmdsn;
+ __u32 maxcmdsn;
+ __u32 datasn;
+ __u32 offset;
+ __u32 residual_count;
+};
+
+/* Data Response PDU flags */
+#define ISCSI_FLAG_DATA_ACK 0x40
+#define ISCSI_FLAG_DATA_OVERFLOW 0x04
+#define ISCSI_FLAG_DATA_UNDERFLOW 0x02
+#define ISCSI_FLAG_DATA_STATUS 0x01
+
+/* Text Header */
+struct iscsi_txt_hdr {
+ __u8 opcode;
+ __u8 flags;
+ __u8 rsvd2[2];
+ __u8 hlength;
+ __u8 dlength[3];
+ __u8 rsvd4[8];
+ __u32 itt;
+ __u32 ttt;
+ __u32 cmdsn;
+ __u32 expstatsn;
+ __u8 rsvd5[16];
+ /* Text - key=value pairs */
+};
+
+#define ISCSI_FLAG_TEXT_CONTINUE 0x40
+
+/* Text Response Header */
+struct iscsi_txt_rsp_hdr {
+ __u8 opcode;
+ __u8 flags;
+ __u8 rsvd2[2];
+ __u8 hlength;
+ __u8 dlength[3];
+ __u8 rsvd4[8];
+ __u32 itt;
+ __u32 ttt;
+ __u32 statsn;
+ __u32 expcmdsn;
+ __u32 maxcmdsn;
+ __u8 rsvd5[12];
+ /* Text Response - key:value pairs */
+};
+
+/* Login Header */
+struct iscsi_login_hdr {
+ __u8 opcode;
+ __u8 flags;
+ __u8 max_version;
+ __u8 min_version;
+ __u8 hlength;
+ __u8 dlength[3];
+ __u8 isid[6];
+ __u16 tsih;
+ __u32 itt;
+ __u16 cid;
+ __u16 rsvd3;
+ __u32 cmdsn;
+ __u32 expstatsn;
+ __u8 rsvd5[16];
+};
+
+/* Login PDU flags */
+#define ISCSI_FLAG_LOGIN_TRANSIT 0x80
+#define ISCSI_FLAG_LOGIN_CONTINUE 0x40
+#define ISCSI_FLAG_LOGIN_CURRENT_STAGE_MASK 0x0C /* 2 bits */
+#define ISCSI_FLAG_LOGIN_NEXT_STAGE_MASK 0x03 /* 2 bits */
+
+#define ISCSI_LOGIN_CURRENT_STAGE(flags) \
+ ((flags & ISCSI_FLAG_LOGIN_CURRENT_STAGE_MASK) >> 2)
+#define ISCSI_LOGIN_NEXT_STAGE(flags) \
+ (flags & ISCSI_FLAG_LOGIN_NEXT_STAGE_MASK)
+
+/* Login Response Header */
+struct iscsi_login_rsp_hdr {
+ __u8 opcode;
+ __u8 flags;
+ __u8 max_version;
+ __u8 active_version;
+ __u8 hlength;
+ __u8 dlength[3];
+ __u8 isid[6];
+ __u16 tsih;
+ __u32 itt;
+ __u32 rsvd3;
+ __u32 statsn;
+ __u32 expcmdsn;
+ __u32 maxcmdsn;
+ __u8 status_class; /* see Login RSP ststus classes below */
+ __u8 status_detail; /* see Login RSP Status details below */
+ __u8 rsvd4[10];
+};
+
+/* Login stage (phase) codes for CSG, NSG */
+#define ISCSI_SECURITY_NEGOTIATION_STAGE 0
+#define ISCSI_OP_PARMS_NEGOTIATION_STAGE 1
+#define ISCSI_FULL_FEATURE_PHASE 3
+
+/* Login Status response classes */
+#define ISCSI_STATUS_CLS_SUCCESS 0x00
+#define ISCSI_STATUS_CLS_REDIRECT 0x01
+#define ISCSI_STATUS_CLS_INITIATOR_ERR 0x02
+#define ISCSI_STATUS_CLS_TARGET_ERR 0x03
+
+/* Login Status response detail codes */
+/* Class-0 (Success) */
+#define ISCSI_LOGIN_STATUS_ACCEPT 0x00
+
+/* Class-1 (Redirection) */
+#define ISCSI_LOGIN_STATUS_TGT_MOVED_TEMP 0x01
+#define ISCSI_LOGIN_STATUS_TGT_MOVED_PERM 0x02
+
+/* Class-2 (Initiator Error) */
+#define ISCSI_LOGIN_STATUS_INIT_ERR 0x00
+#define ISCSI_LOGIN_STATUS_AUTH_FAILED 0x01
+#define ISCSI_LOGIN_STATUS_TGT_FORBIDDEN 0x02
+#define ISCSI_LOGIN_STATUS_TGT_NOT_FOUND 0x03
+#define ISCSI_LOGIN_STATUS_TGT_REMOVED 0x04
+#define ISCSI_LOGIN_STATUS_NO_VERSION 0x05
+#define ISCSI_LOGIN_STATUS_ISID_ERROR 0x06
+#define ISCSI_LOGIN_STATUS_MISSING_FIELDS 0x07
+#define ISCSI_LOGIN_STATUS_CONN_ADD_FAILED 0x08
+#define ISCSI_LOGIN_STATUS_NO_SESSION_TYPE 0x09
+#define ISCSI_LOGIN_STATUS_NO_SESSION 0x0a
+#define ISCSI_LOGIN_STATUS_INVALID_REQUEST 0x0b
+
+/* Class-3 (Target Error) */
+#define ISCSI_LOGIN_STATUS_TARGET_ERROR 0x00
+#define ISCSI_LOGIN_STATUS_SVC_UNAVAILABLE 0x01
+#define ISCSI_LOGIN_STATUS_NO_RESOURCES 0x02
+
+/* Logout Header */
+struct iscsi_logout_hdr {
+ __u8 opcode;
+ __u8 flags;
+ __u8 rsvd1[2];
+ __u8 hlength;
+ __u8 dlength[3];
+ __u8 rsvd2[8];
+ __u32 itt;
+ __u16 cid;
+ __u8 rsvd3[2];
+ __u32 cmdsn;
+ __u32 expstatsn;
+ __u8 rsvd4[16];
+};
+
+/* Logout PDU flags */
+#define ISCSI_FLAG_LOGOUT_REASON_MASK 0x7F
+
+/* logout reason_code values */
+#define ISCSI_LOGOUT_REASON_CLOSE_SESSION 0
+#define ISCSI_LOGOUT_REASON_CLOSE_CONNECTION 1
+#define ISCSI_LOGOUT_REASON_RECOVERY 2
+#define ISCSI_LOGOUT_REASON_AEN_REQUEST 3
+
+/* Logout Response Header */
+struct iscsi_logout_rsp_hdr {
+ __u8 opcode;
+ __u8 flags;
+ __u8 response; /* see Logout response values below */
+ __u8 rsvd2;
+ __u8 hlength;
+ __u8 dlength[3];
+ __u8 rsvd3[8];
+ __u32 itt;
+ __u32 rsvd4;
+ __u32 statsn;
+ __u32 expcmdsn;
+ __u32 maxcmdsn;
+ __u32 rsvd5;
+ __u16 t2wait;
+ __u16 t2retain;
+ __u32 rsvd6;
+};
+
+/* logout response status values */
+#define ISCSI_LOGOUT_SUCCESS 0
+#define ISCSI_LOGOUT_CID_NOT_FOUND 1
+#define ISCSI_LOGOUT_RECOVERY_UNSUPPORTED 2
+#define ISCSI_LOGOUT_CLEANUP_FAILED 3
+
+/* SNACK Header */
+struct iscsi_snack_hdr {
+ __u8 opcode;
+ __u8 flags;
+ __u8 rsvd2[14];
+ __u32 itt;
+ __u32 begrun;
+ __u32 runlength;
+ __u32 expstatsn;
+ __u32 rsvd3;
+ __u32 expdatasn;
+ __u8 rsvd6[8];
+};
+
+/* SNACK PDU flags */
+#define ISCSI_FLAG_SNACK_TYPE_MASK 0x0F /* 4 bits */
+
+/* Reject Header */
+struct iscsi_reject_hdr {
+ __u8 opcode;
+ __u8 flags;
+ __u8 reason;
+ __u8 rsvd2;
+ __u8 rsvd3;
+ __u8 dlength[3];
+ __u8 rsvd4[16];
+ __u32 statsn;
+ __u32 expcmdsn;
+ __u32 maxcmdsn;
+ __u32 datasn;
+ __u8 rsvd5[8];
+ /* Text - Rejected hdr */
+};
+
+/* Reason for Reject */
+#define ISCSI_REJECT_RESERVED 1
+#define ISCSI_REJECT_DATA_DIGEST_ERROR 2
+#define ISCSI_REJECT_SNACK_REJECT 3
+#define ISCSI_REJECT_ISCSI_PROTOCOL_ERROR 4
+#define ISCSI_REJECT_CMD_NOT_SUPPORTED 5
+#define ISCSI_REJECT_IMM_CMD_REJECT 6
+#define ISCSI_REJECT_TASK_IN_PROGRESS 7
+#define ISCSI_REJECT_INVALID_DATA_ACK 8
+#define ISCSI_REJECT_INVALID_PDU_FIELD 9
+#define ISCSI_REJECT_CANT_GENERATE_TTT 10
+#define ISCSI_REJECT_NEGOTIATION_RESET 11
+#define ISCSI_REJECT_WAITING_FOR_LOGOUT 12
+
+#endif
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2005-01-10 22:56 [PATCH 2/10][RFC] linux-iscsi driver Mike Christie
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