diff options
Diffstat (limited to 'drivers/scsi/lpfc/lpfc_hbadisc.c')
| -rw-r--r-- | drivers/scsi/lpfc/lpfc_hbadisc.c | 111 |
1 files changed, 109 insertions, 2 deletions
diff --git a/drivers/scsi/lpfc/lpfc_hbadisc.c b/drivers/scsi/lpfc/lpfc_hbadisc.c index e1c02229c82d..9ccb904e35fc 100644 --- a/drivers/scsi/lpfc/lpfc_hbadisc.c +++ b/drivers/scsi/lpfc/lpfc_hbadisc.c @@ -209,7 +209,12 @@ lpfc_dev_loss_tmo_callbk(struct fc_rport *rport) spin_lock_irqsave(&ndlp->lock, iflags); ndlp->nlp_flag |= NLP_IN_DEV_LOSS; - ndlp->nlp_flag &= ~NLP_NPR_2B_DISC; + + /* If there is a PLOGI in progress, and we are in a + * NLP_NPR_2B_DISC state, don't turn off the flag. + */ + if (ndlp->nlp_state != NLP_STE_PLOGI_ISSUE) + ndlp->nlp_flag &= ~NLP_NPR_2B_DISC; /* * The backend does not expect any more calls associated with this @@ -341,6 +346,37 @@ static void lpfc_check_inactive_vmid(struct lpfc_hba *phba) } /** + * lpfc_check_nlp_post_devloss - Check to restore ndlp refcnt after devloss + * @vport: Pointer to vport object. + * @ndlp: Pointer to remote node object. + * + * If NLP_IN_RECOV_POST_DEV_LOSS flag was set due to outstanding recovery of + * node during dev_loss_tmo processing, then this function restores the nlp_put + * kref decrement from lpfc_dev_loss_tmo_handler. + **/ +void +lpfc_check_nlp_post_devloss(struct lpfc_vport *vport, + struct lpfc_nodelist *ndlp) +{ + unsigned long iflags; + + spin_lock_irqsave(&ndlp->lock, iflags); + if (ndlp->save_flags & NLP_IN_RECOV_POST_DEV_LOSS) { + ndlp->save_flags &= ~NLP_IN_RECOV_POST_DEV_LOSS; + spin_unlock_irqrestore(&ndlp->lock, iflags); + lpfc_nlp_get(ndlp); + lpfc_printf_vlog(vport, KERN_INFO, LOG_DISCOVERY | LOG_NODE, + "8438 Devloss timeout reversed on DID x%x " + "refcnt %d ndlp %p flag x%x " + "port_state = x%x\n", + ndlp->nlp_DID, kref_read(&ndlp->kref), ndlp, + ndlp->nlp_flag, vport->port_state); + spin_lock_irqsave(&ndlp->lock, iflags); + } + spin_unlock_irqrestore(&ndlp->lock, iflags); +} + +/** * lpfc_dev_loss_tmo_handler - Remote node devloss timeout handler * @ndlp: Pointer to remote node object. * @@ -358,6 +394,8 @@ lpfc_dev_loss_tmo_handler(struct lpfc_nodelist *ndlp) uint8_t *name; int warn_on = 0; int fcf_inuse = 0; + bool recovering = false; + struct fc_vport *fc_vport = NULL; unsigned long iflags; vport = ndlp->vport; @@ -394,6 +432,64 @@ lpfc_dev_loss_tmo_handler(struct lpfc_nodelist *ndlp) /* Fabric nodes are done. */ if (ndlp->nlp_type & NLP_FABRIC) { + spin_lock_irqsave(&ndlp->lock, iflags); + /* In massive vport configuration settings, it's possible + * dev_loss_tmo fired during node recovery. So, check if + * fabric nodes are in discovery states outstanding. + */ + switch (ndlp->nlp_DID) { + case Fabric_DID: + fc_vport = vport->fc_vport; + if (fc_vport && + fc_vport->vport_state == FC_VPORT_INITIALIZING) + recovering = true; + break; + case Fabric_Cntl_DID: + if (ndlp->nlp_flag & NLP_REG_LOGIN_SEND) + recovering = true; + break; + case FDMI_DID: + fallthrough; + case NameServer_DID: + if (ndlp->nlp_state >= NLP_STE_PLOGI_ISSUE && + ndlp->nlp_state <= NLP_STE_REG_LOGIN_ISSUE) + recovering = true; + break; + } + spin_unlock_irqrestore(&ndlp->lock, iflags); + + /* Mark an NLP_IN_RECOV_POST_DEV_LOSS flag to know if reversing + * the following lpfc_nlp_put is necessary after fabric node is + * recovered. + */ + if (recovering) { + lpfc_printf_vlog(vport, KERN_INFO, + LOG_DISCOVERY | LOG_NODE, + "8436 Devloss timeout marked on " + "DID x%x refcnt %d ndlp %p " + "flag x%x port_state = x%x\n", + ndlp->nlp_DID, kref_read(&ndlp->kref), + ndlp, ndlp->nlp_flag, + vport->port_state); + spin_lock_irqsave(&ndlp->lock, iflags); + ndlp->save_flags |= NLP_IN_RECOV_POST_DEV_LOSS; + spin_unlock_irqrestore(&ndlp->lock, iflags); + } else if (ndlp->nlp_state == NLP_STE_UNMAPPED_NODE) { + /* Fabric node fully recovered before this dev_loss_tmo + * queue work is processed. Thus, ignore the + * dev_loss_tmo event. + */ + lpfc_printf_vlog(vport, KERN_INFO, + LOG_DISCOVERY | LOG_NODE, + "8437 Devloss timeout ignored on " + "DID x%x refcnt %d ndlp %p " + "flag x%x port_state = x%x\n", + ndlp->nlp_DID, kref_read(&ndlp->kref), + ndlp, ndlp->nlp_flag, + vport->port_state); + return fcf_inuse; + } + lpfc_nlp_put(ndlp); return fcf_inuse; } @@ -423,6 +519,14 @@ lpfc_dev_loss_tmo_handler(struct lpfc_nodelist *ndlp) ndlp->nlp_state, ndlp->nlp_rpi); } + /* If we are devloss, but we are in the process of rediscovering the + * ndlp, don't issue a NLP_EVT_DEVICE_RM event. + */ + if (ndlp->nlp_state >= NLP_STE_PLOGI_ISSUE && + ndlp->nlp_state <= NLP_STE_PRLI_ISSUE) { + return fcf_inuse; + } + if (!(ndlp->fc4_xpt_flags & NVME_XPT_REGD)) lpfc_disc_state_machine(vport, ndlp, NULL, NLP_EVT_DEVICE_RM); @@ -4351,6 +4455,8 @@ lpfc_mbx_cmpl_fc_reg_login(struct lpfc_hba *phba, LPFC_MBOXQ_t *pmb) goto out; } + lpfc_check_nlp_post_devloss(vport, ndlp); + if (phba->sli_rev < LPFC_SLI_REV4) ndlp->nlp_rpi = mb->un.varWords[0]; @@ -4528,9 +4634,10 @@ lpfc_nlp_counters(struct lpfc_vport *vport, int state, int count) void lpfc_nlp_reg_node(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp) { - unsigned long iflags; + lpfc_check_nlp_post_devloss(vport, ndlp); + spin_lock_irqsave(&ndlp->lock, iflags); if (ndlp->fc4_xpt_flags & NLP_XPT_REGD) { /* Already registered with backend, trigger rescan */ |