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scsi: lpfc: fcoe: Fix link down issue after 1000+ link bounces 

On FCoE adapters, when running link bounce test in a loop, initiator
failed to login with switch switch and required driver reload to
recover. Switch reached a point where all subsequent FLOGIs would be
LS_RJT'd. Further testing showed the condition to be related to not
performing FCF discovery between FLOGI's.

Fix by monitoring FLOGI failures and once a repeated error is seen
repeat FCF discovery.

Signed-off-by: Dick Kennedy <dick.kennedy@broadcom.com>
Signed-off-by: James Smart <jsmart2021@gmail.com>
Reviewed-by: Hannes Reinecke <hare@suse.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
This commit is contained in:
James Smart 2018-10-23 13:41:06 -07:00 committed by Martin K. Petersen
parent 191e2f7493
commit 036cad1f1a
5 changed files with 26 additions and 10 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
drivers/scsi/lpfc/lpfc_els.c
View File

@ -1157,6 +1157,7 @@ stop_rr_fcf_flogi:
phba->fcf.fcf_flag &= ~FCF_DISCOVERY;
phba->hba_flag &= ~(FCF_RR_INPROG | HBA_DEVLOSS_TMO);
spin_unlock_irq(&phba->hbalock);
phba->fcf.fcf_redisc_attempted = 0; /* reset */
goto out;
}
if (!rc) {
@ -1171,6 +1172,7 @@ stop_rr_fcf_flogi:
phba->fcf.fcf_flag &= ~FCF_DISCOVERY;
phba->hba_flag &= ~(FCF_RR_INPROG | HBA_DEVLOSS_TMO);
spin_unlock_irq(&phba->hbalock);
phba->fcf.fcf_redisc_attempted = 0; /* reset */
goto out;
}
}

20
drivers/scsi/lpfc/lpfc_hbadisc.c
View File

@ -1992,6 +1992,26 @@ int lpfc_sli4_fcf_rr_next_proc(struct lpfc_vport *vport, uint16_t fcf_index)
"failover and change port state:x%x/x%x\n",
phba->pport->port_state, LPFC_VPORT_UNKNOWN);
phba->pport->port_state = LPFC_VPORT_UNKNOWN;
if (!phba->fcf.fcf_redisc_attempted) {
lpfc_unregister_fcf(phba);
rc = lpfc_sli4_redisc_fcf_table(phba);
if (!rc) {
lpfc_printf_log(phba, KERN_INFO, LOG_FIP,
"3195 Rediscover FCF table\n");
phba->fcf.fcf_redisc_attempted = 1;
lpfc_sli4_clear_fcf_rr_bmask(phba);
} else {
lpfc_printf_log(phba, KERN_WARNING, LOG_FIP,
"3196 Rediscover FCF table "
"failed. Status:x%x\n", rc);
}
} else {
lpfc_printf_log(phba, KERN_WARNING, LOG_FIP,
"3197 Already rediscover FCF table "
"attempted. No more retry\n");
}
goto stop_flogi_current_fcf;
} else {
lpfc_printf_log(phba, KERN_INFO, LOG_FIP | LOG_ELS,

2
drivers/scsi/lpfc/lpfc_init.c
View File

@ -5069,7 +5069,7 @@ lpfc_sli4_async_fip_evt(struct lpfc_hba *phba,
break;
}
/* If fast FCF failover rescan event is pending, do nothing */
if (phba->fcf.fcf_flag & FCF_REDISC_EVT) {
if (phba->fcf.fcf_flag & (FCF_REDISC_EVT | FCF_REDISC_PEND)) {
spin_unlock_irq(&phba->hbalock);
break;
}

11
drivers/scsi/lpfc/lpfc_sli.c
View File

@ -18712,15 +18712,8 @@ next_priority:
goto initial_priority;
lpfc_printf_log(phba, KERN_WARNING, LOG_FIP,
"2844 No roundrobin failover FCF available\n");
if (next_fcf_index >= LPFC_SLI4_FCF_TBL_INDX_MAX)
return LPFC_FCOE_FCF_NEXT_NONE;
else {
lpfc_printf_log(phba, KERN_WARNING, LOG_FIP,
"3063 Only FCF available idx %d, flag %x\n",
next_fcf_index,
phba->fcf.fcf_pri[next_fcf_index].fcf_rec.flag);
return next_fcf_index;
}
return LPFC_FCOE_FCF_NEXT_NONE;
}
if (next_fcf_index < LPFC_SLI4_FCF_TBL_INDX_MAX &&

1
drivers/scsi/lpfc/lpfc_sli4.h
View File

@ -279,6 +279,7 @@ struct lpfc_fcf {
#define FCF_REDISC_EVT 0x100 /* FCF rediscovery event to worker thread */
#define FCF_REDISC_FOV 0x200 /* Post FCF rediscovery fast failover */
#define FCF_REDISC_PROG (FCF_REDISC_PEND | FCF_REDISC_EVT)
uint16_t fcf_redisc_attempted;
uint32_t addr_mode;
uint32_t eligible_fcf_cnt;
struct lpfc_fcf_rec current_rec;