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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);
2338 * This function will wait for a relogin, session termination from 2338 * This function will wait for a relogin, session termination from
2339 * userspace, or a recovery/replacement timeout. 2339 * userspace, or a recovery/replacement timeout.
2340 */ 2340 */
2341static int iscsi_eh_session_reset(struct scsi_cmnd *sc) 2341int iscsi_eh_session_reset(struct scsi_cmnd *sc)
2342{ 2342{
2343 struct iscsi_cls_session *cls_session; 2343 struct iscsi_cls_session *cls_session;
2344 struct iscsi_session *session; 2344 struct iscsi_session *session;
@@ -2389,6 +2389,7 @@ failed:
2389 mutex_unlock(&session->eh_mutex); 2389 mutex_unlock(&session->eh_mutex);
2390 return SUCCESS; 2390 return SUCCESS;
2391} 2391}
2392EXPORT_SYMBOL_GPL(iscsi_eh_session_reset);
2392 2393
2393static void iscsi_prep_tgt_reset_pdu(struct scsi_cmnd *sc, struct iscsi_tm *hdr) 2394static void iscsi_prep_tgt_reset_pdu(struct scsi_cmnd *sc, struct iscsi_tm *hdr)
2394{ 2395{
@@ -2403,8 +2404,7 @@ static void iscsi_prep_tgt_reset_pdu(struct scsi_cmnd *sc, struct iscsi_tm *hdr)
2403 * iscsi_eh_target_reset - reset target 2404 * iscsi_eh_target_reset - reset target
2404 * @sc: scsi command 2405 * @sc: scsi command
2405 * 2406 *
2406 * This will attempt to send a warm target reset. If that fails 2407 * This will attempt to send a warm target reset.
2407 * then we will drop the session and attempt ERL0 recovery.
2408 */ 2408 */
2409int iscsi_eh_target_reset(struct scsi_cmnd *sc) 2409int iscsi_eh_target_reset(struct scsi_cmnd *sc)
2410{ 2410{
@@ -2476,12 +2476,27 @@ done:
2476 ISCSI_DBG_EH(session, "tgt %s reset result = %s\n", session->targetname, 2476 ISCSI_DBG_EH(session, "tgt %s reset result = %s\n", session->targetname,
2477 rc == SUCCESS ? "SUCCESS" : "FAILED"); 2477 rc == SUCCESS ? "SUCCESS" : "FAILED");
2478 mutex_unlock(&session->eh_mutex); 2478 mutex_unlock(&session->eh_mutex);
2479 return rc;
2480}
2481EXPORT_SYMBOL_GPL(iscsi_eh_target_reset);
2479 2482
2483/**
2484 * iscsi_eh_recover_target - reset target and possibly the session
2485 * @sc: scsi command
2486 *
2487 * This will attempt to send a warm target reset. If that fails,
2488 * we will escalate to ERL0 session recovery.
2489 */
2490int iscsi_eh_recover_target(struct scsi_cmnd *sc)
2491{
2492 int rc;
2493
2494 rc = iscsi_eh_target_reset(sc);
2480 if (rc == FAILED) 2495 if (rc == FAILED)
2481 rc = iscsi_eh_session_reset(sc); 2496 rc = iscsi_eh_session_reset(sc);
2482 return rc; 2497 return rc;
2483} 2498}
2484EXPORT_SYMBOL_GPL(iscsi_eh_target_reset); 2499EXPORT_SYMBOL_GPL(iscsi_eh_recover_target);
2485 2500
2486/* 2501/*
2487 * Pre-allocate a pool of @max items of @item_size. By default, the pool 2502 * Pre-allocate a pool of @max items of @item_size. By default, the pool