From 87af33fe5f78c27cf9e43c6e586dd6efd4be3e40 Mon Sep 17 00:00:00 2001 From: James Smart Date: Sat, 27 Oct 2007 13:37:43 -0400 Subject: [SCSI] lpfc 8.2.3 : FC Discovery Fixes FC Discovery Fixes: - Fix up lpfc_drop_node() vs lpfc_nlp_not_used() usage - Clear ADISC flag when unregistering RPI and REMOVE ndlps if in recovery. - Fix usage of UNUSED list and ndlps - Fix PLOGI race conditions - Reset link if NameServer PLOGI errors occur - Synchronize GID_FT queries with PLOGI receptions Signed-off-by: James Smart Signed-off-by: James Bottomley --- drivers/scsi/lpfc/lpfc_hbadisc.c | 96 +++++++++++++++++++--------------------- 1 file changed, 45 insertions(+), 51 deletions(-) (limited to 'drivers/scsi/lpfc/lpfc_hbadisc.c') diff --git a/drivers/scsi/lpfc/lpfc_hbadisc.c b/drivers/scsi/lpfc/lpfc_hbadisc.c index e181a98caf1..f64ce88e8a0 100644 --- a/drivers/scsi/lpfc/lpfc_hbadisc.c +++ b/drivers/scsi/lpfc/lpfc_hbadisc.c @@ -157,6 +157,8 @@ lpfc_dev_loss_tmo_handler(struct lpfc_nodelist *ndlp) struct lpfc_vport *vport; struct lpfc_hba *phba; uint8_t *name; + int put_node; + int put_rport; int warn_on = 0; rport = ndlp->rport; @@ -178,9 +180,6 @@ lpfc_dev_loss_tmo_handler(struct lpfc_nodelist *ndlp) return; if (ndlp->nlp_type & NLP_FABRIC) { - int put_node; - int put_rport; - /* We will clean up these Nodes in linkup */ put_node = rdata->pnode != NULL; put_rport = ndlp->rport != NULL; @@ -222,23 +221,20 @@ lpfc_dev_loss_tmo_handler(struct lpfc_nodelist *ndlp) ndlp->nlp_state, ndlp->nlp_rpi); } + put_node = rdata->pnode != NULL; + put_rport = ndlp->rport != NULL; + rdata->pnode = NULL; + ndlp->rport = NULL; + if (put_node) + lpfc_nlp_put(ndlp); + if (put_rport) + put_device(&rport->dev); + if (!(vport->load_flag & FC_UNLOADING) && !(ndlp->nlp_flag & NLP_DELAY_TMO) && !(ndlp->nlp_flag & NLP_NPR_2B_DISC) && - (ndlp->nlp_state != NLP_STE_UNMAPPED_NODE)) + (ndlp->nlp_state != NLP_STE_UNMAPPED_NODE)) { lpfc_disc_state_machine(vport, ndlp, NULL, NLP_EVT_DEVICE_RM); - else { - int put_node; - int put_rport; - - put_node = rdata->pnode != NULL; - put_rport = ndlp->rport != NULL; - rdata->pnode = NULL; - ndlp->rport = NULL; - if (put_node) - lpfc_nlp_put(ndlp); - if (put_rport) - put_device(&rport->dev); } } @@ -546,11 +542,9 @@ lpfc_cleanup_rpis(struct lpfc_vport *vport, int remove) } } -static void +void lpfc_port_link_failure(struct lpfc_vport *vport) { - struct lpfc_nodelist *ndlp, *next_ndlp; - /* Cleanup any outstanding RSCN activity */ lpfc_els_flush_rscn(vport); @@ -559,11 +553,6 @@ lpfc_port_link_failure(struct lpfc_vport *vport) lpfc_cleanup_rpis(vport, 0); - /* free any ndlp's on unused list */ - list_for_each_entry_safe(ndlp, next_ndlp, &vport->fc_nodes, nlp_listp) - if (ndlp->nlp_state == NLP_STE_UNUSED_NODE) - lpfc_drop_node(vport, ndlp); - /* Turn off discovery timer if its running */ lpfc_can_disctmo(vport); } @@ -670,7 +659,6 @@ static void lpfc_linkup_port(struct lpfc_vport *vport) { struct Scsi_Host *shost = lpfc_shost_from_vport(vport); - struct lpfc_nodelist *ndlp, *next_ndlp; struct lpfc_hba *phba = vport->phba; if ((vport->load_flag & FC_UNLOADING) != 0) @@ -697,11 +685,6 @@ lpfc_linkup_port(struct lpfc_vport *vport) if (vport->fc_flag & FC_LBIT) lpfc_linkup_cleanup_nodes(vport); - /* free any ndlp's in unused state */ - list_for_each_entry_safe(ndlp, next_ndlp, &vport->fc_nodes, - nlp_listp) - if (ndlp->nlp_state == NLP_STE_UNUSED_NODE) - lpfc_drop_node(vport, ndlp); } static int @@ -1345,7 +1328,9 @@ out: lpfc_mbuf_free(phba, mp->virt, mp->phys); kfree(mp); mempool_free(pmb, phba->mbox_mem_pool); - lpfc_drop_node(vport, ndlp); + + /* If no other thread is using the ndlp, free it */ + lpfc_nlp_not_used(ndlp); if (phba->fc_topology == TOPOLOGY_LOOP) { /* @@ -1605,16 +1590,6 @@ lpfc_nlp_set_state(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp, ndlp->nlp_type &= ~NLP_FC_NODE; } - if ((old_state == NLP_STE_UNUSED_NODE) && - (state != NLP_STE_UNUSED_NODE) && - (ndlp->nlp_flag & NLP_DELAYED_RM)) { - /* We are using the ndlp after all, so reverse - * the delayed removal of it. - */ - ndlp->nlp_flag &= ~NLP_DELAYED_RM; - lpfc_nlp_get(ndlp); - } - if (list_empty(&ndlp->nlp_listp)) { spin_lock_irq(shost->host_lock); list_add_tail(&ndlp->nlp_listp, &vport->fc_nodes); @@ -1646,9 +1621,16 @@ lpfc_dequeue_node(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp) void lpfc_drop_node(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp) { + /* + * Use of lpfc_drop_node and UNUSED list. lpfc_drop_node should + * be used if we wish to issue the "last" lpfc_nlp_put() to remove + * the ndlp from the vport. The ndlp resides on the UNUSED list + * until ALL other outstanding threads have completed. Thus, if a + * ndlp is on the UNUSED list already, we should never do another + * lpfc_drop_node() on it. + */ lpfc_nlp_set_state(vport, ndlp, NLP_STE_UNUSED_NODE); - if (!(ndlp->nlp_flag & NLP_DELAYED_RM)) - lpfc_nlp_put(ndlp); + lpfc_nlp_put(ndlp); return; } @@ -2116,6 +2098,12 @@ lpfc_setup_disc_node(struct lpfc_vport *vport, uint32_t did) } if (vport->fc_flag & FC_RSCN_MODE) { if (lpfc_rscn_payload_check(vport, did)) { + /* If we've already recieved a PLOGI from this NPort + * we don't need to try to discover it again. + */ + if (ndlp->nlp_flag & NLP_RCV_PLOGI) + return NULL; + spin_lock_irq(shost->host_lock); ndlp->nlp_flag |= NLP_NPR_2B_DISC; spin_unlock_irq(shost->host_lock); @@ -2128,8 +2116,13 @@ lpfc_setup_disc_node(struct lpfc_vport *vport, uint32_t did) } else ndlp = NULL; } else { + /* If we've already recieved a PLOGI from this NPort, + * or we are already in the process of discovery on it, + * we don't need to try to discover it again. + */ if (ndlp->nlp_state == NLP_STE_ADISC_ISSUE || - ndlp->nlp_state == NLP_STE_PLOGI_ISSUE) + ndlp->nlp_state == NLP_STE_PLOGI_ISSUE || + ndlp->nlp_flag & NLP_RCV_PLOGI) return NULL; lpfc_nlp_set_state(vport, ndlp, NLP_STE_NPR_NODE); spin_lock_irq(shost->host_lock); @@ -2497,6 +2490,7 @@ lpfc_disc_timeout_handler(struct lpfc_vport *vport) if (ndlp->nlp_type & NLP_FABRIC) { /* Clean up the ndlp on Fabric connections */ lpfc_drop_node(vport, ndlp); + } else if (!(ndlp->nlp_flag & NLP_NPR_ADISC)) { /* Fail outstanding IO now since device * is marked for PLOGI. @@ -2515,7 +2509,7 @@ lpfc_disc_timeout_handler(struct lpfc_vport *vport) /* Initial FLOGI timeout */ lpfc_printf_vlog(vport, KERN_ERR, LOG_DISCOVERY, "0222 Initial %s timeout\n", - vport->vpi ? "FLOGI" : "FDISC"); + vport->vpi ? "FDISC" : "FLOGI"); /* Assume no Fabric and go on with discovery. * Check for outstanding ELS FLOGI to abort. @@ -2537,10 +2531,10 @@ lpfc_disc_timeout_handler(struct lpfc_vport *vport) /* Next look for NameServer ndlp */ ndlp = lpfc_findnode_did(vport, NameServer_DID); if (ndlp) - lpfc_nlp_put(ndlp); - /* Start discovery */ - lpfc_disc_start(vport); - break; + lpfc_els_abort(phba, ndlp); + + /* ReStart discovery */ + goto restart_disc; case LPFC_NS_QRY: /* Check for wait for NameServer Rsp timeout */ @@ -2559,6 +2553,7 @@ lpfc_disc_timeout_handler(struct lpfc_vport *vport) } vport->fc_ns_retry = 0; +restart_disc: /* * Discovery is over. * set port_state to PORT_READY if SLI2. @@ -2731,8 +2726,7 @@ __lpfc_find_node(struct lpfc_vport *vport, node_filter filter, void *param) struct lpfc_nodelist *ndlp; list_for_each_entry(ndlp, &vport->fc_nodes, nlp_listp) { - if (ndlp->nlp_state != NLP_STE_UNUSED_NODE && - filter(ndlp, param)) + if (filter(ndlp, param)) return ndlp; } return NULL; -- cgit v1.2.3