From c2b9712edd32967d84befe8628270a85f1b7e5a6 Mon Sep 17 00:00:00 2001
From: James Smart <james.smart@emulex.com>
Date: Fri, 31 May 2013 17:05:36 -0400
Subject: [PATCH] [SCSI] lpfc 8.3.40: Fixed a race condition between SLI host
and port failed FCF rediscovery
Signed-off-by: James Smart <james.smart@emulex.com>
Signed-off-by: James Bottomley <JBottomley@Parallels.com>
---
drivers/scsi/lpfc/lpfc_init.c | 97 +++++++++++++----------------------
1 file changed, 35 insertions(+), 62 deletions(-)
diff --git a/drivers/scsi/lpfc/lpfc_init.c b/drivers/scsi/lpfc/lpfc_init.c
index 7e5a2b16521fce..cba2d955777b20 100644
--- a/drivers/scsi/lpfc/lpfc_init.c
+++ b/drivers/scsi/lpfc/lpfc_init.c
@@ -4049,52 +4049,6 @@ lpfc_sli4_perform_all_vport_cvl(struct lpfc_hba *phba)
lpfc_destroy_vport_work_array(phba, vports);
}
-/**
- * lpfc_sli4_perform_inuse_fcf_recovery - Perform inuse fcf recovery
- * @vport: pointer to lpfc hba data structure.
- *
- * This routine is to perform FCF recovery when the in-use FCF either dead or
- * got modified.
- **/
-static void
-lpfc_sli4_perform_inuse_fcf_recovery(struct lpfc_hba *phba,
- struct lpfc_acqe_fip *acqe_fip)
-{
- int rc;
-
- spin_lock_irq(&phba->hbalock);
- /* Mark the fast failover process in progress */
- phba->fcf.fcf_flag |= FCF_DEAD_DISC;
- spin_unlock_irq(&phba->hbalock);
-
- lpfc_printf_log(phba, KERN_INFO, LOG_FIP | LOG_DISCOVERY,
- "2771 Start FCF fast failover process due to in-use "
- "FCF DEAD/MODIFIED event: evt_tag:x%x, index:x%x\n",
- acqe_fip->event_tag, acqe_fip->index);
- rc = lpfc_sli4_redisc_fcf_table(phba);
- if (rc) {
- lpfc_printf_log(phba, KERN_ERR, LOG_FIP | LOG_DISCOVERY,
- "2772 Issue FCF rediscover mabilbox command "
- "failed, fail through to FCF dead event\n");
- spin_lock_irq(&phba->hbalock);
- phba->fcf.fcf_flag &= ~FCF_DEAD_DISC;
- spin_unlock_irq(&phba->hbalock);
- /*
- * Last resort will fail over by treating this as a link
- * down to FCF registration.
- */
- lpfc_sli4_fcf_dead_failthrough(phba);
- } else {
- /* Reset FCF roundrobin bmask for new discovery */
- lpfc_sli4_clear_fcf_rr_bmask(phba);
- /*
- * Handling fast FCF failover to a DEAD FCF event is
- * considered equalivant to receiving CVL to all vports.
- */
- lpfc_sli4_perform_all_vport_cvl(phba);
- }
-}
-
/**
* lpfc_sli4_async_fip_evt - Process the asynchronous FCoE FIP event
* @phba: pointer to lpfc hba data structure.
@@ -4160,22 +4114,9 @@ lpfc_sli4_async_fip_evt(struct lpfc_hba *phba,
break;
}
- /* If FCF has been in discovered state, perform rediscovery
- * only if the FCF with the same index of the in-use FCF got
- * modified during normal operation. Otherwise, do nothing.
- */
- if (phba->pport->port_state > LPFC_FLOGI) {
+ /* If the FCF has been in discovered state, do nothing. */
+ if (phba->fcf.fcf_flag & FCF_SCAN_DONE) {
spin_unlock_irq(&phba->hbalock);
- if (phba->fcf.current_rec.fcf_indx ==
- acqe_fip->index) {
- lpfc_printf_log(phba, KERN_ERR, LOG_FIP,
- "3300 In-use FCF (%d) "
- "modified, perform FCF "
- "rediscovery\n",
- acqe_fip->index);
- lpfc_sli4_perform_inuse_fcf_recovery(phba,
- acqe_fip);
- }
break;
}
spin_unlock_irq(&phba->hbalock);
@@ -4228,7 +4169,39 @@ lpfc_sli4_async_fip_evt(struct lpfc_hba *phba,
* is no longer valid as we are not in the middle of FCF
* failover process already.
*/
- lpfc_sli4_perform_inuse_fcf_recovery(phba, acqe_fip);
+ spin_lock_irq(&phba->hbalock);
+ /* Mark the fast failover process in progress */
+ phba->fcf.fcf_flag |= FCF_DEAD_DISC;
+ spin_unlock_irq(&phba->hbalock);
+
+ lpfc_printf_log(phba, KERN_INFO, LOG_FIP | LOG_DISCOVERY,
+ "2771 Start FCF fast failover process due to "
+ "FCF DEAD event: evt_tag:x%x, fcf_index:x%x "
+ "\n", acqe_fip->event_tag, acqe_fip->index);
+ rc = lpfc_sli4_redisc_fcf_table(phba);
+ if (rc) {
+ lpfc_printf_log(phba, KERN_ERR, LOG_FIP |
+ LOG_DISCOVERY,
+ "2772 Issue FCF rediscover mabilbox "
+ "command failed, fail through to FCF "
+ "dead event\n");
+ spin_lock_irq(&phba->hbalock);
+ phba->fcf.fcf_flag &= ~FCF_DEAD_DISC;
+ spin_unlock_irq(&phba->hbalock);
+ /*
+ * Last resort will fail over by treating this
+ * as a link down to FCF registration.
+ */
+ lpfc_sli4_fcf_dead_failthrough(phba);
+ } else {
+ /* Reset FCF roundrobin bmask for new discovery */
+ lpfc_sli4_clear_fcf_rr_bmask(phba);
+ /*
+ * Handling fast FCF failover to a DEAD FCF event is
+ * considered equalivant to receiving CVL to all vports.
+ */
+ lpfc_sli4_perform_all_vport_cvl(phba);
+ }
break;
case LPFC_FIP_EVENT_TYPE_CVL:
phba->fcoe_cvl_eventtag = acqe_fip->event_tag;
--
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