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[SCSI] libiscsi: Make iscsi_eh_target_reset start with session reset

Browse source 
The iscsi_eh_target_reset has been modified to attempt
target reset only. If it fails, then iscsi_eh_session_reset
will be called.

Signed-off-by: Mike Christie <michaelc@cs.wisc.edu>
Signed-off-by: Jayamohan Kallickal <jayamohank@serverengines.com>
Signed-off-by: James Bottomley <James.Bottomley@suse.de>
This commit is contained in:
Jayamohan Kallickal 2010-02-20 08:02:10 +05:30 committed by James Bottomley
parent d7b4627f5f
commit 309ce156aa
7 changed files with 26 additions and 10 deletions
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2
drivers/infiniband/ulp/iser/iscsi_iser.c
View file

@ -596,7 +596,7 @@ static struct scsi_host_template iscsi_iser_sht = {
.cmd_per_lun = ISER_DEF_CMD_PER_LUN,
.eh_abort_handler = iscsi_eh_abort,
.eh_device_reset_handler= iscsi_eh_device_reset,
.eh_target_reset_handler= iscsi_eh_target_reset,
.eh_target_reset_handler = iscsi_eh_recover_target,
.target_alloc = iscsi_target_alloc,
.use_clustering = DISABLE_CLUSTERING,
.proc_name = "iscsi_iser",

2
drivers/scsi/be2iscsi/be_main.c
View file

@ -79,7 +79,7 @@ static struct scsi_host_template beiscsi_sht = {
.slave_configure = beiscsi_slave_configure,
.target_alloc = iscsi_target_alloc,
.eh_device_reset_handler = iscsi_eh_device_reset,
.eh_target_reset_handler = iscsi_eh_target_reset,
.eh_target_reset_handler = iscsi_eh_session_reset,
.sg_tablesize = BEISCSI_SGLIST_ELEMENTS,
.can_queue = BE2_IO_DEPTH,
.this_id = -1,

2
drivers/scsi/bnx2i/bnx2i_iscsi.c
View file

@ -1989,7 +1989,7 @@ static struct scsi_host_template bnx2i_host_template = {
.queuecommand = iscsi_queuecommand,
.eh_abort_handler = iscsi_eh_abort,
.eh_device_reset_handler = iscsi_eh_device_reset,
.eh_target_reset_handler = iscsi_eh_target_reset,
.eh_target_reset_handler = iscsi_eh_recover_target,
.change_queue_depth = iscsi_change_queue_depth,
.can_queue = 1024,
.max_sectors = 127,

2
drivers/scsi/cxgb3i/cxgb3i_iscsi.c
View file

@ -915,7 +915,7 @@ static struct scsi_host_template cxgb3i_host_template = {
.cmd_per_lun = ISCSI_DEF_CMD_PER_LUN,
.eh_abort_handler = iscsi_eh_abort,
.eh_device_reset_handler = iscsi_eh_device_reset,
.eh_target_reset_handler = iscsi_eh_target_reset,
.eh_target_reset_handler = iscsi_eh_recover_target,
.target_alloc = iscsi_target_alloc,
.use_clustering = DISABLE_CLUSTERING,
.this_id = -1,

2
drivers/scsi/iscsi_tcp.c
View file

@ -874,7 +874,7 @@ static struct scsi_host_template iscsi_sw_tcp_sht = {
.cmd_per_lun = ISCSI_DEF_CMD_PER_LUN,
.eh_abort_handler = iscsi_eh_abort,
.eh_device_reset_handler= iscsi_eh_device_reset,
.eh_target_reset_handler= iscsi_eh_target_reset,
.eh_target_reset_handler = iscsi_eh_recover_target,
.use_clustering = DISABLE_CLUSTERING,
.slave_alloc = iscsi_sw_tcp_slave_alloc,
.slave_configure = iscsi_sw_tcp_slave_configure,

23
drivers/scsi/libiscsi.c
View file

@ -2338,7 +2338,7 @@ EXPORT_SYMBOL_GPL(iscsi_session_recovery_timedout);
* This function will wait for a relogin, session termination from
* userspace, or a recovery/replacement timeout.
*/
static int iscsi_eh_session_reset(struct scsi_cmnd *sc)
int iscsi_eh_session_reset(struct scsi_cmnd *sc)
{
struct iscsi_cls_session *cls_session;
struct iscsi_session *session;
@ -2389,6 +2389,7 @@ static int iscsi_eh_session_reset(struct scsi_cmnd *sc)
mutex_unlock(&session->eh_mutex);
return SUCCESS;
}
EXPORT_SYMBOL_GPL(iscsi_eh_session_reset);
static void iscsi_prep_tgt_reset_pdu(struct scsi_cmnd *sc, struct iscsi_tm *hdr)
{
@ -2403,8 +2404,7 @@ static void iscsi_prep_tgt_reset_pdu(struct scsi_cmnd *sc, struct iscsi_tm *hdr)
* iscsi_eh_target_reset - reset target
* @sc: scsi command
*
* This will attempt to send a warm target reset. If that fails
* then we will drop the session and attempt ERL0 recovery.
* This will attempt to send a warm target reset.
*/
int iscsi_eh_target_reset(struct scsi_cmnd *sc)
{
@ -2476,12 +2476,27 @@ int iscsi_eh_target_reset(struct scsi_cmnd *sc)
ISCSI_DBG_EH(session, "tgt %s reset result = %s\n", session->targetname,
rc == SUCCESS ? "SUCCESS" : "FAILED");
mutex_unlock(&session->eh_mutex);
return rc;
}
EXPORT_SYMBOL_GPL(iscsi_eh_target_reset);
/**
* iscsi_eh_recover_target - reset target and possibly the session
* @sc: scsi command
*
* This will attempt to send a warm target reset. If that fails,
* we will escalate to ERL0 session recovery.
*/
int iscsi_eh_recover_target(struct scsi_cmnd *sc)
{
int rc;
rc = iscsi_eh_target_reset(sc);
if (rc == FAILED)
rc = iscsi_eh_session_reset(sc);
return rc;
}
EXPORT_SYMBOL_GPL(iscsi_eh_target_reset);
EXPORT_SYMBOL_GPL(iscsi_eh_recover_target);
/*
* Pre-allocate a pool of @max items of @item_size. By default, the pool

3
include/scsi/libiscsi.h
View file

@ -338,7 +338,8 @@ struct iscsi_host {
extern int iscsi_change_queue_depth(struct scsi_device *sdev, int depth,
int reason);
extern int iscsi_eh_abort(struct scsi_cmnd *sc);
extern int iscsi_eh_target_reset(struct scsi_cmnd *sc);
extern int iscsi_eh_recover_target(struct scsi_cmnd *sc);
extern int iscsi_eh_session_reset(struct scsi_cmnd *sc);
extern int iscsi_eh_device_reset(struct scsi_cmnd *sc);
extern int iscsi_queuecommand(struct scsi_cmnd *sc,
void (*done)(struct scsi_cmnd *));