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authorMike Christie <michaelc@cs.wisc.edu>2010-12-31 02:22:18 -0600
committerJames Bottomley <James.Bottomley@suse.de>2010-12-31 09:51:54 -0600
commitdf4da5cdfca05b37b366b9c69925b68586969c1c (patch)
treefd5b1c7a6de1c32092e5f4635462ffbe71c029f5
parent5c10007560589a2335a77cbc92347b1474518296 (diff)
[SCSI] libiscsi: add more informative failure message during iscsi scsi eh
This adds a more informative error code and message for the iscsi scsi eh session drop paths. This allows you to distinguish if the session was dropped due to a connection failure vs the iscsi layer dropping the session due to scsi eh failure processing. Signed-off-by: Mike Christie <michaelc@cs.wisc.edu> Signed-off-by: James Bottomley <James.Bottomley@suse.de>
-rw-r--r--drivers/scsi/libiscsi.c10
-rw-r--r--include/scsi/iscsi_if.h1
2 files changed, 6 insertions, 5 deletions
diff --git a/drivers/scsi/libiscsi.c b/drivers/scsi/libiscsi.c
index 7551abe40900..3eddab0774e4 100644
--- a/drivers/scsi/libiscsi.c
+++ b/drivers/scsi/libiscsi.c
@@ -1796,9 +1796,9 @@ static int iscsi_exec_task_mgmt_fn(struct iscsi_conn *conn,
NULL, 0);
if (!task) {
spin_unlock_bh(&session->lock);
+ iscsi_conn_printk(KERN_ERR, conn, "Could not send TMF.\n");
iscsi_conn_failure(conn, ISCSI_ERR_CONN_FAILED);
spin_lock_bh(&session->lock);
- ISCSI_DBG_EH(session, "tmf exec failure\n");
return -EPERM;
}
conn->tmfcmd_pdus_cnt++;
@@ -2203,7 +2203,7 @@ int iscsi_eh_abort(struct scsi_cmnd *sc)
goto success_unlocked;
case TMF_TIMEDOUT:
spin_unlock_bh(&session->lock);
- iscsi_conn_failure(conn, ISCSI_ERR_CONN_FAILED);
+ iscsi_conn_failure(conn, ISCSI_ERR_SCSI_EH_SESSION_RST);
goto failed_unlocked;
case TMF_NOT_FOUND:
if (!sc->SCp.ptr) {
@@ -2290,7 +2290,7 @@ int iscsi_eh_device_reset(struct scsi_cmnd *sc)
break;
case TMF_TIMEDOUT:
spin_unlock_bh(&session->lock);
- iscsi_conn_failure(conn, ISCSI_ERR_CONN_FAILED);
+ iscsi_conn_failure(conn, ISCSI_ERR_SCSI_EH_SESSION_RST);
goto done;
default:
conn->tmf_state = TMF_INITIAL;
@@ -2371,7 +2371,7 @@ failed:
* we drop the lock here but the leadconn cannot be destoyed while
* we are in the scsi eh
*/
- iscsi_conn_failure(conn, ISCSI_ERR_CONN_FAILED);
+ iscsi_conn_failure(conn, ISCSI_ERR_SCSI_EH_SESSION_RST);
ISCSI_DBG_EH(session, "wait for relogin\n");
wait_event_interruptible(conn->ehwait,
@@ -2453,7 +2453,7 @@ int iscsi_eh_target_reset(struct scsi_cmnd *sc)
break;
case TMF_TIMEDOUT:
spin_unlock_bh(&session->lock);
- iscsi_conn_failure(conn, ISCSI_ERR_CONN_FAILED);
+ iscsi_conn_failure(conn, ISCSI_ERR_SCSI_EH_SESSION_RST);
goto done;
default:
conn->tmf_state = TMF_INITIAL;
diff --git a/include/scsi/iscsi_if.h b/include/scsi/iscsi_if.h
index a8631acd37c3..c3e1cbcc2ad2 100644
--- a/include/scsi/iscsi_if.h
+++ b/include/scsi/iscsi_if.h
@@ -263,6 +263,7 @@ enum iscsi_err {
ISCSI_ERR_INVALID_HOST = ISCSI_ERR_BASE + 18,
ISCSI_ERR_XMIT_FAILED = ISCSI_ERR_BASE + 19,
ISCSI_ERR_TCP_CONN_CLOSE = ISCSI_ERR_BASE + 20,
+ ISCSI_ERR_SCSI_EH_SESSION_RST = ISCSI_ERR_BASE + 21,
};
/*