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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 /drivers/scsi/libiscsi.c
parentd7b4627f5f3390a2f350f16c047b3fc3eccce6d8 (diff)
downloadblackbird-op-linux-309ce156aa27f29338438011d292a8d6496623d3.tar.gz
blackbird-op-linux-309ce156aa27f29338438011d292a8d6496623d3.zip
[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>
Diffstat (limited to 'drivers/scsi/libiscsi.c')
-rw-r--r--drivers/scsi/libiscsi.c23
1 files changed, 19 insertions, 4 deletions
diff --git a/drivers/scsi/libiscsi.c b/drivers/scsi/libiscsi.c
index 703eb6a88790..685eaec53218 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
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