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[SCSI] qla4xxx: Allow removal of failed session using logout.

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If logout is performed on a failed session entry then that session
should be gracefully removed.

Signed-off-by: Adheer Chandravanshi <adheer.chandravanshi@qlogic.com>
Signed-off-by: Vikas Chaudhary <vikas.chaudhary@qlogic.com>
Reviewed-by: Mike Christie <michaelc@cs.wisc.edu>
Signed-off-by: James Bottomley <JBottomley@Parallels.com>
This commit is contained in:
Adheer Chandravanshi 2013-07-08 08:33:05 -04:00 committed by James Bottomley
parent 810d22f753
commit 99c6a33b47
2 changed files with 41 additions and 8 deletions
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1
drivers/scsi/qla4xxx/ql4_def.h
View File

@ -335,6 +335,7 @@ struct ql4_tuple_ddb {
#define DF_BOOT_TGT 1 /* Boot target entry */
#define DF_ISNS_DISCOVERED 2 /* Device was discovered via iSNS */
#define DF_FO_MASKED 3
#define DF_DISABLE_RELOGIN 4 /* Disable relogin to device */
enum qla4_work_type {
QLA4_EVENT_AEN,

48
drivers/scsi/qla4xxx/ql4_os.c
View File

@ -3583,7 +3583,9 @@ static void qla4xxx_relogin_devices(struct iscsi_cls_session *cls_session)
} else {
/* Trigger relogin */
if (ddb_entry->ddb_type == FLASH_DDB) {
if (!test_bit(DF_RELOGIN, &ddb_entry->flags))
if (!(test_bit(DF_RELOGIN, &ddb_entry->flags) ||
test_bit(DF_DISABLE_RELOGIN,
&ddb_entry->flags)))
qla4xxx_arm_relogin_timer(ddb_entry);
} else
iscsi_session_failure(cls_session->dd_data,
@ -3686,6 +3688,9 @@ static void qla4xxx_dpc_relogin(struct iscsi_cls_session *cls_sess)
if (!(ddb_entry->ddb_type == FLASH_DDB))
return;
if (test_bit(DF_DISABLE_RELOGIN, &ddb_entry->flags))
return;
if (test_and_clear_bit(DF_RELOGIN, &ddb_entry->flags) &&
!iscsi_is_session_online(cls_sess)) {
DEBUG2(ql4_printk(KERN_INFO, ha,
@ -6014,13 +6019,6 @@ static int qla4xxx_sysfs_ddb_logout_sid(struct iscsi_cls_session *cls_sess)
goto exit_ddb_logout;
}
options = LOGOUT_OPTION_CLOSE_SESSION;
if (qla4xxx_session_logout_ddb(ha, ddb_entry, options) == QLA_ERROR) {
ql4_printk(KERN_ERR, ha, "%s: Logout failed\n", __func__);
ret = -EIO;
goto exit_ddb_logout;
}
fw_ddb_entry = dma_alloc_coherent(&ha->pdev->dev, sizeof(*fw_ddb_entry),
&fw_ddb_entry_dma, GFP_KERNEL);
if (!fw_ddb_entry) {
@ -6030,6 +6028,38 @@ static int qla4xxx_sysfs_ddb_logout_sid(struct iscsi_cls_session *cls_sess)
goto exit_ddb_logout;
}
if (test_and_set_bit(DF_DISABLE_RELOGIN, &ddb_entry->flags))
goto ddb_logout_init;
ret = qla4xxx_get_fwddb_entry(ha, ddb_entry->fw_ddb_index,
fw_ddb_entry, fw_ddb_entry_dma,
NULL, NULL, &ddb_state, NULL,
NULL, NULL);
if (ret == QLA_ERROR)
goto ddb_logout_init;
if (ddb_state == DDB_DS_SESSION_ACTIVE)
goto ddb_logout_init;
/* wait until next relogin is triggered using DF_RELOGIN and
* clear DF_RELOGIN to avoid invocation of further relogin
*/
wtime = jiffies + (HZ * RELOGIN_TOV);
do {
if (test_and_clear_bit(DF_RELOGIN, &ddb_entry->flags))
goto ddb_logout_init;
schedule_timeout_uninterruptible(HZ);
} while ((time_after(wtime, jiffies)));
ddb_logout_init:
atomic_set(&ddb_entry->retry_relogin_timer, INVALID_ENTRY);
atomic_set(&ddb_entry->relogin_timer, 0);
options = LOGOUT_OPTION_CLOSE_SESSION;
qla4xxx_session_logout_ddb(ha, ddb_entry, options);
memset(fw_ddb_entry, 0, sizeof(*fw_ddb_entry));
wtime = jiffies + (HZ * LOGOUT_TOV);
do {
ret = qla4xxx_get_fwddb_entry(ha, ddb_entry->fw_ddb_index,
@ -6059,10 +6089,12 @@ static int qla4xxx_sysfs_ddb_logout_sid(struct iscsi_cls_session *cls_sess)
spin_lock_irqsave(&ha->hardware_lock, flags);
qla4xxx_free_ddb(ha, ddb_entry);
clear_bit(ddb_entry->fw_ddb_index, ha->ddb_idx_map);
spin_unlock_irqrestore(&ha->hardware_lock, flags);
iscsi_session_teardown(ddb_entry->sess);
clear_bit(DF_DISABLE_RELOGIN, &ddb_entry->flags);
ret = QLA_SUCCESS;
exit_ddb_logout: