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authorJayamohan Kallickal <jayamohank@serverengines.com>2010-02-20 08:02:10 +0530
committerJames Bottomley <James.Bottomley@suse.de>2010-03-03 17:39:04 +0530
commit309ce156aa27f29338438011d292a8d6496623d3 (patch)
tree7d0554a3a6c7c15b612b8eeb00991c0e54cdaf1e
parentd7b4627f5f3390a2f350f16c047b3fc3eccce6d8 (diff)
[SCSI] libiscsi: Make iscsi_eh_target_reset start with session reset
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>
-rw-r--r--drivers/infiniband/ulp/iser/iscsi_iser.c2
-rw-r--r--drivers/scsi/be2iscsi/be_main.c2
-rw-r--r--drivers/scsi/bnx2i/bnx2i_iscsi.c2
-rw-r--r--drivers/scsi/cxgb3i/cxgb3i_iscsi.c2
-rw-r--r--drivers/scsi/iscsi_tcp.c2
-rw-r--r--drivers/scsi/libiscsi.c23
-rw-r--r--include/scsi/libiscsi.h3
7 files changed, 26 insertions, 10 deletions
diff --git a/drivers/infiniband/ulp/iser/iscsi_iser.c b/drivers/infiniband/ulp/iser/iscsi_iser.c
index 5f7a6fca0a4..5472b7e9abd 100644
--- a/drivers/infiniband/ulp/iser/iscsi_iser.c
+++ b/drivers/infiniband/ulp/iser/iscsi_iser.c
@@ -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",
diff --git a/drivers/scsi/be2iscsi/be_main.c b/drivers/scsi/be2iscsi/be_main.c
index 7c22616ab14..4d269b434a7 100644
--- a/drivers/scsi/be2iscsi/be_main.c
+++ b/drivers/scsi/be2iscsi/be_main.c
@@ -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,
diff --git a/drivers/scsi/bnx2i/bnx2i_iscsi.c b/drivers/scsi/bnx2i/bnx2i_iscsi.c
index 1c4d1215769..cb71dc98479 100644
--- a/drivers/scsi/bnx2i/bnx2i_iscsi.c
+++ b/drivers/scsi/bnx2i/bnx2i_iscsi.c
@@ -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,
diff --git a/drivers/scsi/cxgb3i/cxgb3i_iscsi.c b/drivers/scsi/cxgb3i/cxgb3i_iscsi.c
index 412853c6537..b7c30585dad 100644
--- a/drivers/scsi/cxgb3i/cxgb3i_iscsi.c
+++ b/drivers/scsi/cxgb3i/cxgb3i_iscsi.c
@@ -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,
diff --git a/drivers/scsi/iscsi_tcp.c b/drivers/scsi/iscsi_tcp.c
index 8a89ba90058..249053a9d4f 100644
--- a/drivers/scsi/iscsi_tcp.c
+++ b/drivers/scsi/iscsi_tcp.c
@@ -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,
diff --git a/drivers/scsi/libiscsi.c b/drivers/scsi/libiscsi.c
index 703eb6a8879..685eaec5321 100644
--- a/drivers/scsi/libiscsi.c
+++ b/drivers/scsi/libiscsi.c
@@ -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 @@ failed:
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 @@ done:
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
diff --git a/include/scsi/libiscsi.h b/include/scsi/libiscsi.h
index ff92b46f515..ae5196aae1a 100644
--- a/include/scsi/libiscsi.h
+++ b/include/scsi/libiscsi.h
@@ -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 *));