From: Christof Schmitt <christof.schmitt@de.ibm.com>
To: James Bottomley <James.Bottomley@suse.de>
Cc: linux-scsi@vger.kernel.org, linux-s390@vger.kernel.org,
schwidefsky@de.ibm.com, heiko.carstens@de.ibm.com,
Swen Schillig <swen@vnet.ibm.com>,
Christof Schmitt <christof.schmitt@de.ibm.com>
Subject: [patch 09/22] zfcp: Remove STATUS_COMMON_REMOVE flag as it is not required anymore
Date: Tue, 24 Nov 2009 16:54:05 +0100 [thread overview]
Message-ID: <20091124160137.288123000@de.ibm.com> (raw)
In-Reply-To: 20091124155356.135092000@de.ibm.com
[-- Attachment #1: 707-zfcp-remove-flag.diff --]
[-- Type: text/plain, Size: 11711 bytes --]
From: Swen Schillig <swen@vnet.ibm.com>
The flag ZFCP_STATUS_COMMON_REMOVE was used to indicate that a
resource is not ready to be used or about to be removed from the
system. This is now better done by an improved list handling
and therefore the additional indicator is not required anymore.
Signed-off-by: Swen Schillig <swen@vnet.ibm.com>
Signed-off-by: Christof Schmitt <christof.schmitt@de.ibm.com>
---
drivers/s390/scsi/zfcp_aux.c | 27 ++++-----------
drivers/s390/scsi/zfcp_ccw.c | 7 ----
drivers/s390/scsi/zfcp_def.h | 1
drivers/s390/scsi/zfcp_erp.c | 6 ++-
drivers/s390/scsi/zfcp_fc.c | 1
drivers/s390/scsi/zfcp_sysfs.c | 70 ++++++++++++-----------------------------
6 files changed, 34 insertions(+), 78 deletions(-)
diff -urpN linux-2.6/drivers/s390/scsi/zfcp_aux.c linux-2.6-patched/drivers/s390/scsi/zfcp_aux.c
--- linux-2.6/drivers/s390/scsi/zfcp_aux.c 2009-11-23 09:59:40.000000000 +0100
+++ linux-2.6-patched/drivers/s390/scsi/zfcp_aux.c 2009-11-23 09:59:40.000000000 +0100
@@ -245,9 +245,9 @@ struct zfcp_unit *zfcp_get_unit_by_lun(s
read_lock_irqsave(&port->unit_list_lock, flags);
list_for_each_entry(unit, &port->unit_list, list)
- if ((unit->fcp_lun == fcp_lun) &&
- !(atomic_read(&unit->status) & ZFCP_STATUS_COMMON_REMOVE)) {
- get_device(&unit->sysfs_device);
+ if (unit->fcp_lun == fcp_lun) {
+ if (!get_device(&unit->sysfs_device))
+ unit = NULL;
read_unlock_irqrestore(&port->unit_list_lock, flags);
return unit;
}
@@ -270,9 +270,9 @@ struct zfcp_port *zfcp_get_port_by_wwpn(
read_lock_irqsave(&adapter->port_list_lock, flags);
list_for_each_entry(port, &adapter->port_list, list)
- if ((port->wwpn == wwpn) &&
- !(atomic_read(&port->status) & ZFCP_STATUS_COMMON_REMOVE)) {
- get_device(&port->sysfs_device);
+ if (port->wwpn == wwpn) {
+ if (!get_device(&port->sysfs_device))
+ port = NULL;
read_unlock_irqrestore(&adapter->port_list_lock, flags);
return port;
}
@@ -334,9 +334,6 @@ struct zfcp_unit *zfcp_unit_enqueue(stru
}
retval = -EINVAL;
- /* mark unit unusable as long as sysfs registration is not complete */
- atomic_set_mask(ZFCP_STATUS_COMMON_REMOVE, &unit->status);
-
INIT_WORK(&unit->scsi_work, zfcp_scsi_scan);
spin_lock_init(&unit->latencies.lock);
@@ -360,7 +357,6 @@ struct zfcp_unit *zfcp_unit_enqueue(stru
list_add_tail(&unit->list, &port->unit_list);
write_unlock_irq(&port->unit_list_lock);
- atomic_clear_mask(ZFCP_STATUS_COMMON_REMOVE, &unit->status);
atomic_set_mask(ZFCP_STATUS_COMMON_RUNNING, &unit->status);
return unit;
@@ -565,17 +561,12 @@ struct zfcp_adapter *zfcp_adapter_enqueu
adapter->service_level.seq_print = zfcp_print_sl;
- /* mark adapter unusable as long as sysfs registration is not complete */
- atomic_set_mask(ZFCP_STATUS_COMMON_REMOVE, &adapter->status);
-
dev_set_drvdata(&ccw_device->dev, adapter);
if (sysfs_create_group(&ccw_device->dev.kobj,
&zfcp_sysfs_adapter_attrs))
goto failed;
- atomic_clear_mask(ZFCP_STATUS_COMMON_REMOVE, &adapter->status);
-
if (!zfcp_adapter_scsi_register(adapter))
return adapter;
@@ -692,9 +683,6 @@ struct zfcp_port *zfcp_port_enqueue(stru
port->sysfs_device.parent = &adapter->ccw_device->dev;
port->sysfs_device.release = zfcp_port_release;
- /* mark port unusable as long as sysfs registration is not complete */
- atomic_set_mask(status | ZFCP_STATUS_COMMON_REMOVE, &port->status);
-
if (dev_set_name(&port->sysfs_device, "0x%016llx",
(unsigned long long)wwpn)) {
kfree(port);
@@ -715,8 +703,7 @@ struct zfcp_port *zfcp_port_enqueue(stru
list_add_tail(&port->list, &adapter->port_list);
write_unlock_irq(&adapter->port_list_lock);
- atomic_clear_mask(ZFCP_STATUS_COMMON_REMOVE, &port->status);
- atomic_set_mask(ZFCP_STATUS_COMMON_RUNNING, &port->status);
+ atomic_set_mask(status | ZFCP_STATUS_COMMON_RUNNING, &port->status);
return port;
diff -urpN linux-2.6/drivers/s390/scsi/zfcp_ccw.c linux-2.6-patched/drivers/s390/scsi/zfcp_ccw.c
--- linux-2.6/drivers/s390/scsi/zfcp_ccw.c 2009-11-23 09:59:40.000000000 +0100
+++ linux-2.6-patched/drivers/s390/scsi/zfcp_ccw.c 2009-11-23 09:59:40.000000000 +0100
@@ -113,16 +113,11 @@ static void zfcp_ccw_remove(struct ccw_d
write_lock_irq(&adapter->port_list_lock);
list_for_each_entry_safe(port, p, &adapter->port_list, list) {
write_lock(&port->unit_list_lock);
- list_for_each_entry_safe(unit, u, &port->unit_list, list) {
- atomic_set_mask(ZFCP_STATUS_COMMON_REMOVE,
- &unit->status);
+ list_for_each_entry_safe(unit, u, &port->unit_list, list)
list_move(&unit->list, &unit_remove_lh);
- }
write_unlock(&port->unit_list_lock);
- atomic_set_mask(ZFCP_STATUS_COMMON_REMOVE, &port->status);
list_move(&port->list, &port_remove_lh);
}
- atomic_set_mask(ZFCP_STATUS_COMMON_REMOVE, &adapter->status);
write_unlock_irq(&adapter->port_list_lock);
zfcp_ccw_adapter_put(adapter); /* put from zfcp_ccw_adapter_by_cdev */
diff -urpN linux-2.6/drivers/s390/scsi/zfcp_def.h linux-2.6-patched/drivers/s390/scsi/zfcp_def.h
--- linux-2.6/drivers/s390/scsi/zfcp_def.h 2009-11-23 09:59:39.000000000 +0100
+++ linux-2.6-patched/drivers/s390/scsi/zfcp_def.h 2009-11-23 09:59:40.000000000 +0100
@@ -205,7 +205,6 @@ struct zfcp_ls_adisc {
#define ZFCP_COMMON_FLAGS 0xfff00000
/* common status bits */
-#define ZFCP_STATUS_COMMON_REMOVE 0x80000000
#define ZFCP_STATUS_COMMON_RUNNING 0x40000000
#define ZFCP_STATUS_COMMON_ERP_FAILED 0x20000000
#define ZFCP_STATUS_COMMON_UNBLOCKED 0x10000000
diff -urpN linux-2.6/drivers/s390/scsi/zfcp_erp.c linux-2.6-patched/drivers/s390/scsi/zfcp_erp.c
--- linux-2.6/drivers/s390/scsi/zfcp_erp.c 2009-11-23 09:59:38.000000000 +0100
+++ linux-2.6-patched/drivers/s390/scsi/zfcp_erp.c 2009-11-23 09:59:40.000000000 +0100
@@ -174,7 +174,8 @@ static struct zfcp_erp_action *zfcp_erp_
switch (need) {
case ZFCP_ERP_ACTION_REOPEN_UNIT:
- get_device(&unit->sysfs_device);
+ if (!get_device(&unit->sysfs_device))
+ return NULL;
atomic_set_mask(ZFCP_STATUS_COMMON_ERP_INUSE, &unit->status);
erp_action = &unit->erp_action;
if (!(atomic_read(&unit->status) & ZFCP_STATUS_COMMON_RUNNING))
@@ -183,7 +184,8 @@ static struct zfcp_erp_action *zfcp_erp_
case ZFCP_ERP_ACTION_REOPEN_PORT:
case ZFCP_ERP_ACTION_REOPEN_PORT_FORCED:
- get_device(&port->sysfs_device);
+ if (!get_device(&port->sysfs_device))
+ return NULL;
zfcp_erp_action_dismiss_port(port);
atomic_set_mask(ZFCP_STATUS_COMMON_ERP_INUSE, &port->status);
erp_action = &port->erp_action;
diff -urpN linux-2.6/drivers/s390/scsi/zfcp_fc.c linux-2.6-patched/drivers/s390/scsi/zfcp_fc.c
--- linux-2.6/drivers/s390/scsi/zfcp_fc.c 2009-11-23 09:59:39.000000000 +0100
+++ linux-2.6-patched/drivers/s390/scsi/zfcp_fc.c 2009-11-23 09:59:40.000000000 +0100
@@ -589,7 +589,6 @@ static void zfcp_fc_validate_port(struct
!list_empty(&port->unit_list))
return;
- atomic_set_mask(ZFCP_STATUS_COMMON_REMOVE, &port->status);
list_move_tail(&port->list, lh);
}
diff -urpN linux-2.6/drivers/s390/scsi/zfcp_sysfs.c linux-2.6-patched/drivers/s390/scsi/zfcp_sysfs.c
--- linux-2.6/drivers/s390/scsi/zfcp_sysfs.c 2009-11-23 09:59:39.000000000 +0100
+++ linux-2.6-patched/drivers/s390/scsi/zfcp_sysfs.c 2009-11-23 09:59:40.000000000 +0100
@@ -104,10 +104,8 @@ static ssize_t zfcp_sysfs_##_feat##_fail
unsigned long val; \
int retval = 0; \
\
- if (atomic_read(&_feat->status) & ZFCP_STATUS_COMMON_REMOVE) { \
- retval = -EBUSY; \
- goto out; \
- } \
+ if (!(_feat && get_device(&_feat->sysfs_device))) \
+ return -EBUSY; \
\
if (strict_strtoul(buf, 0, &val) || val != 0) { \
retval = -EINVAL; \
@@ -120,6 +118,7 @@ static ssize_t zfcp_sysfs_##_feat##_fail
_reopen_id, NULL); \
zfcp_erp_wait(_adapter); \
out: \
+ put_device(&_feat->sysfs_device); \
return retval ? retval : (ssize_t) count; \
} \
static ZFCP_DEV_ATTR(_feat, failed, S_IWUSR | S_IRUGO, \
@@ -161,11 +160,6 @@ static ssize_t zfcp_sysfs_adapter_failed
if (!adapter)
return -ENODEV;
- if (atomic_read(&adapter->status) & ZFCP_STATUS_COMMON_REMOVE) {
- retval = -EBUSY;
- goto out;
- }
-
if (strict_strtoul(buf, 0, &val) || val != 0) {
retval = -EINVAL;
goto out;
@@ -195,14 +189,9 @@ static ssize_t zfcp_sysfs_port_rescan_st
if (!adapter)
return -ENODEV;
- if (atomic_read(&adapter->status) & ZFCP_STATUS_COMMON_REMOVE) {
- ret = -EBUSY;
- goto out;
- }
-
ret = zfcp_fc_scan_ports(adapter);
-out:
zfcp_ccw_adapter_put(adapter);
+
return ret ? ret : (ssize_t) count;
}
static ZFCP_DEV_ATTR(adapter, port_rescan, S_IWUSR, NULL,
@@ -216,28 +205,19 @@ static ssize_t zfcp_sysfs_port_remove_st
struct zfcp_adapter *adapter = zfcp_ccw_adapter_by_cdev(cdev);
struct zfcp_port *port;
u64 wwpn;
- int retval = 0;
+ int retval = -EINVAL;
if (!adapter)
return -ENODEV;
- if (atomic_read(&adapter->status) & ZFCP_STATUS_COMMON_REMOVE) {
- retval = -EBUSY;
+ if (strict_strtoull(buf, 0, (unsigned long long *) &wwpn))
goto out;
- }
-
- if (strict_strtoull(buf, 0, (unsigned long long *) &wwpn)) {
- retval = -EINVAL;
- goto out;
- }
port = zfcp_get_port_by_wwpn(adapter, wwpn);
- if (!port) {
- retval = -ENXIO;
+ if (!port)
goto out;
- }
-
- atomic_set_mask(ZFCP_STATUS_COMMON_REMOVE, &port->status);
+ else
+ retval = 0;
write_lock_irq(&adapter->port_list_lock);
list_del(&port->list);
@@ -283,10 +263,8 @@ static ssize_t zfcp_sysfs_unit_add_store
u64 fcp_lun;
int retval = -EINVAL;
- if (atomic_read(&port->status) & ZFCP_STATUS_COMMON_REMOVE) {
- retval = -EBUSY;
- goto out;
- }
+ if (!(port && get_device(&port->sysfs_device)))
+ return -EBUSY;
if (strict_strtoull(buf, 0, (unsigned long long *) &fcp_lun))
goto out;
@@ -294,13 +272,14 @@ static ssize_t zfcp_sysfs_unit_add_store
unit = zfcp_unit_enqueue(port, fcp_lun);
if (IS_ERR(unit))
goto out;
-
- retval = 0;
+ else
+ retval = 0;
zfcp_erp_unit_reopen(unit, 0, "syuas_1", NULL);
zfcp_erp_wait(unit->port->adapter);
flush_work(&unit->scsi_work);
out:
+ put_device(&port->sysfs_device);
return retval ? retval : (ssize_t) count;
}
static DEVICE_ATTR(unit_add, S_IWUSR, NULL, zfcp_sysfs_unit_add_store);
@@ -313,29 +292,23 @@ static ssize_t zfcp_sysfs_unit_remove_st
sysfs_device);
struct zfcp_unit *unit;
u64 fcp_lun;
- int retval = 0;
+ int retval = -EINVAL;
- if (atomic_read(&port->status) & ZFCP_STATUS_COMMON_REMOVE) {
- retval = -EBUSY;
- goto out;
- }
+ if (!(port && get_device(&port->sysfs_device)))
+ return -EBUSY;
- if (strict_strtoull(buf, 0, (unsigned long long *) &fcp_lun)) {
- retval = -EINVAL;
+ if (strict_strtoull(buf, 0, (unsigned long long *) &fcp_lun))
goto out;
- }
unit = zfcp_get_unit_by_lun(port, fcp_lun);
- if (!unit) {
- retval = -EINVAL;
+ if (!unit)
goto out;
- }
+ else
+ retval = 0;
/* wait for possible timeout during SCSI probe */
flush_work(&unit->scsi_work);
- atomic_set_mask(ZFCP_STATUS_COMMON_REMOVE, &unit->status);
-
write_lock_irq(&port->unit_list_lock);
list_del(&unit->list);
write_unlock_irq(&port->unit_list_lock);
@@ -345,6 +318,7 @@ static ssize_t zfcp_sysfs_unit_remove_st
zfcp_erp_unit_shutdown(unit, 0, "syurs_1", NULL);
zfcp_device_unregister(&unit->sysfs_device, &zfcp_sysfs_unit_attrs);
out:
+ put_device(&port->sysfs_device);
return retval ? retval : (ssize_t) count;
}
static DEVICE_ATTR(unit_remove, S_IWUSR, NULL, zfcp_sysfs_unit_remove_store);
next prev parent reply other threads:[~2009-11-24 16:01 UTC|newest]
Thread overview: 23+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-11-24 15:53 [patch 00/22] zfcp patches for 2.6.33 merge window Christof Schmitt
2009-11-24 15:53 ` [patch 01/22] SCSI: Add target reset flag to FCP header file Christof Schmitt
2009-11-24 15:53 ` [patch 02/22] zfcp: Replace global config_lock with local list locks Christof Schmitt
2009-11-24 15:53 ` [patch 03/22] zfcp: Replace local reference counting with common kref Christof Schmitt
2009-11-24 15:54 ` [patch 04/22] zfcp: Remove global config_mutex Christof Schmitt
2009-11-24 15:54 ` [patch 05/22] zfcp: Remove suspend callback Christof Schmitt
2009-11-24 15:54 ` [patch 06/22] zfcp: Access ports and units with container_of in sysfs code Christof Schmitt
2009-11-24 15:54 ` [patch 07/22] zfcp: Merge trace code for fsf requests in one function Christof Schmitt
2009-11-24 15:54 ` [patch 08/22] zfcp: Implement module unloading Christof Schmitt
2009-11-24 15:54 ` Christof Schmitt [this message]
2009-11-24 15:54 ` [patch 10/22] zfcp: Assign scheduled work to driver queue Christof Schmitt
2009-11-24 15:54 ` [patch 11/22] zfcp: Dont fail SCSI commands when transitioning to blocked fc_rport Christof Schmitt
2009-11-24 15:54 ` [patch 12/22] zfcp: Update FCP protocol related code Christof Schmitt
2009-11-24 15:54 ` [patch 13/22] zfcp: Use common code definitions for FC ELS structs Christof Schmitt
2009-11-24 15:54 ` [patch 14/22] zfcp: Use common code definitions for FC CT structs Christof Schmitt
2009-11-24 15:54 ` [patch 15/22] zfcp: Move WKA port to zfcp FC code Christof Schmitt
2009-11-24 15:54 ` [patch 16/22] zfcp: Remove ZFCP_DID_MASK Christof Schmitt
2009-11-24 15:54 ` [patch 17/22] zfcp: Simplify handling of ct and els requests Christof Schmitt
2009-11-24 15:54 ` [patch 18/22] zfcp: Improve ELS ADISC handling Christof Schmitt
2009-11-24 15:54 ` [patch 19/22] zfcp: Update FSF error reporting Christof Schmitt
2009-11-24 15:54 ` [patch 20/22] zfcp: Block scsi_eh thread for rport state BLOCKED Christof Schmitt
2009-11-24 15:54 ` [patch 21/22] zfcp: Activate fc4s attributes for zfcp in FC transport class Christof Schmitt
2009-11-24 15:54 ` [patch 22/22] zfcp: Remove flag ZFCP_STATUS_FSFREQ_TMFUNCNOTSUPP Christof Schmitt
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20091124160137.288123000@de.ibm.com \
--to=christof.schmitt@de.ibm.com \
--cc=James.Bottomley@suse.de \
--cc=heiko.carstens@de.ibm.com \
--cc=linux-s390@vger.kernel.org \
--cc=linux-scsi@vger.kernel.org \
--cc=schwidefsky@de.ibm.com \
--cc=swen@vnet.ibm.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox