From: Jamie Wellnitz Date: Wed, 1 Mar 2006 03:33:10 +0000 (-0500) Subject: [PATCH] lpfc 8.1.3: Protect NPL lists with host lock X-Git-Tag: v2.6.17-rc1~1129^2~4^2~81 X-Git-Url: http://www.pilppa.org/gitweb/gitweb.cgi?a=commitdiff_plain;h=66a9ed66000d186933892ca5121e68a071d624ac;p=linux-2.6-omap-h63xx.git [PATCH] lpfc 8.1.3: Protect NPL lists with host lock Protect NPL lists with host lock Symptoms: lpfc_findnode_rpi and lpfc_findnode_did can be called outside of the discovery thread context. We have to iterate through the NPL lists under the host lock and all add/del operations on those lists have to be done under host lock. Signed-off-by: Jamie Wellnitz Signed-off-by: James Bottomley --- diff --git a/drivers/scsi/lpfc/lpfc_els.c b/drivers/scsi/lpfc/lpfc_els.c index 6e1a5162851..090f4609d2a 100644 --- a/drivers/scsi/lpfc/lpfc_els.c +++ b/drivers/scsi/lpfc/lpfc_els.c @@ -3144,8 +3144,9 @@ lpfc_els_timeout_handler(struct lpfc_hba *phba) if (cmd->ulpCommand == CMD_GEN_REQUEST64_CR) { struct lpfc_nodelist *ndlp; - + spin_unlock_irq(phba->host->host_lock); ndlp = lpfc_findnode_rpi(phba, cmd->ulpContext); + spin_lock_irq(phba->host->host_lock); remote_ID = ndlp->nlp_DID; if (cmd->un.elsreq64.bdl.ulpIoTag32) { lpfc_sli_issue_abort_iotag32(phba, diff --git a/drivers/scsi/lpfc/lpfc_hbadisc.c b/drivers/scsi/lpfc/lpfc_hbadisc.c index aa58ff0e321..e7664a6bd25 100644 --- a/drivers/scsi/lpfc/lpfc_hbadisc.c +++ b/drivers/scsi/lpfc/lpfc_hbadisc.c @@ -1097,6 +1097,7 @@ lpfc_nlp_list(struct lpfc_hba * phba, struct lpfc_nodelist * nlp, int list) if (list != NLP_NO_LIST) return 0; + spin_lock_irq(phba->host->host_lock); switch (nlp->nlp_flag & NLP_LIST_MASK) { case NLP_NO_LIST: /* Not on any list */ break; @@ -1123,10 +1124,8 @@ lpfc_nlp_list(struct lpfc_hba * phba, struct lpfc_nodelist * nlp, int list) case NLP_UNMAPPED_LIST: phba->fc_unmap_cnt--; list_del(&nlp->nlp_listp); - spin_lock_irq(phba->host->host_lock); nlp->nlp_flag &= ~NLP_TGT_NO_SCSIID; nlp->nlp_type &= ~NLP_FC_NODE; - spin_unlock_irq(phba->host->host_lock); phba->nport_event_cnt++; if (nlp->rport) rport_del = unmapped; @@ -1144,20 +1143,18 @@ lpfc_nlp_list(struct lpfc_hba * phba, struct lpfc_nodelist * nlp, int list) /* Stop delay tmo if taking node off NPR list */ if ((nlp->nlp_flag & NLP_DELAY_TMO) && (list != NLP_NPR_LIST)) { - spin_lock_irq(phba->host->host_lock); nlp->nlp_flag &= ~NLP_DELAY_TMO; - spin_unlock_irq(phba->host->host_lock); nlp->nlp_last_elscmd = 0; + spin_unlock_irq(phba->host->host_lock); del_timer_sync(&nlp->nlp_delayfunc); + spin_lock_irq(phba->host->host_lock); if (!list_empty(&nlp->els_retry_evt.evt_listp)) list_del_init(&nlp->els_retry_evt.evt_listp); } break; } - spin_lock_irq(phba->host->host_lock); nlp->nlp_flag &= ~NLP_LIST_MASK; - spin_unlock_irq(phba->host->host_lock); /* Add NPort to list */ lpfc_printf_log(phba, @@ -1169,46 +1166,38 @@ lpfc_nlp_list(struct lpfc_hba * phba, struct lpfc_nodelist * nlp, int list) switch (list) { case NLP_NO_LIST: /* No list, just remove it */ + spin_unlock_irq(phba->host->host_lock); lpfc_nlp_remove(phba, nlp); + spin_lock_irq(phba->host->host_lock); /* as node removed - stop further transport calls */ rport_del = none; break; case NLP_UNUSED_LIST: - spin_lock_irq(phba->host->host_lock); nlp->nlp_flag |= list; - spin_unlock_irq(phba->host->host_lock); /* Put it at the end of the unused list */ list_add_tail(&nlp->nlp_listp, &phba->fc_unused_list); phba->fc_unused_cnt++; break; case NLP_PLOGI_LIST: - spin_lock_irq(phba->host->host_lock); nlp->nlp_flag |= list; - spin_unlock_irq(phba->host->host_lock); /* Put it at the end of the plogi list */ list_add_tail(&nlp->nlp_listp, &phba->fc_plogi_list); phba->fc_plogi_cnt++; break; case NLP_ADISC_LIST: - spin_lock_irq(phba->host->host_lock); nlp->nlp_flag |= list; - spin_unlock_irq(phba->host->host_lock); /* Put it at the end of the adisc list */ list_add_tail(&nlp->nlp_listp, &phba->fc_adisc_list); phba->fc_adisc_cnt++; break; case NLP_REGLOGIN_LIST: - spin_lock_irq(phba->host->host_lock); nlp->nlp_flag |= list; - spin_unlock_irq(phba->host->host_lock); /* Put it at the end of the reglogin list */ list_add_tail(&nlp->nlp_listp, &phba->fc_reglogin_list); phba->fc_reglogin_cnt++; break; case NLP_PRLI_LIST: - spin_lock_irq(phba->host->host_lock); nlp->nlp_flag |= list; - spin_unlock_irq(phba->host->host_lock); /* Put it at the end of the prli list */ list_add_tail(&nlp->nlp_listp, &phba->fc_prli_list); phba->fc_prli_cnt++; @@ -1217,19 +1206,17 @@ lpfc_nlp_list(struct lpfc_hba * phba, struct lpfc_nodelist * nlp, int list) rport_add = unmapped; /* ensure all vestiges of "mapped" significance are gone */ nlp->nlp_type &= ~(NLP_FCP_TARGET | NLP_FCP_INITIATOR); - spin_lock_irq(phba->host->host_lock); nlp->nlp_flag |= list; - spin_unlock_irq(phba->host->host_lock); /* Put it at the end of the unmap list */ list_add_tail(&nlp->nlp_listp, &phba->fc_nlpunmap_list); phba->fc_unmap_cnt++; phba->nport_event_cnt++; /* stop nodev tmo if running */ if (nlp->nlp_flag & NLP_NODEV_TMO) { - spin_lock_irq(phba->host->host_lock); nlp->nlp_flag &= ~NLP_NODEV_TMO; spin_unlock_irq(phba->host->host_lock); del_timer_sync(&nlp->nlp_tmofunc); + spin_lock_irq(phba->host->host_lock); if (!list_empty(&nlp->nodev_timeout_evt.evt_listp)) list_del_init(&nlp->nodev_timeout_evt. evt_listp); @@ -1239,9 +1226,7 @@ lpfc_nlp_list(struct lpfc_hba * phba, struct lpfc_nodelist * nlp, int list) break; case NLP_MAPPED_LIST: rport_add = mapped; - spin_lock_irq(phba->host->host_lock); nlp->nlp_flag |= list; - spin_unlock_irq(phba->host->host_lock); /* Put it at the end of the map list */ list_add_tail(&nlp->nlp_listp, &phba->fc_nlpmap_list); phba->fc_map_cnt++; @@ -1249,7 +1234,9 @@ lpfc_nlp_list(struct lpfc_hba * phba, struct lpfc_nodelist * nlp, int list) /* stop nodev tmo if running */ if (nlp->nlp_flag & NLP_NODEV_TMO) { nlp->nlp_flag &= ~NLP_NODEV_TMO; + spin_unlock_irq(phba->host->host_lock); del_timer_sync(&nlp->nlp_tmofunc); + spin_lock_irq(phba->host->host_lock); if (!list_empty(&nlp->nodev_timeout_evt.evt_listp)) list_del_init(&nlp->nodev_timeout_evt. evt_listp); @@ -1257,9 +1244,7 @@ lpfc_nlp_list(struct lpfc_hba * phba, struct lpfc_nodelist * nlp, int list) } break; case NLP_NPR_LIST: - spin_lock_irq(phba->host->host_lock); nlp->nlp_flag |= list; - spin_unlock_irq(phba->host->host_lock); /* Put it at the end of the npr list */ list_add_tail(&nlp->nlp_listp, &phba->fc_npr_list); phba->fc_npr_cnt++; @@ -1268,15 +1253,15 @@ lpfc_nlp_list(struct lpfc_hba * phba, struct lpfc_nodelist * nlp, int list) mod_timer(&nlp->nlp_tmofunc, jiffies + HZ * phba->cfg_nodev_tmo); - spin_lock_irq(phba->host->host_lock); nlp->nlp_flag |= NLP_NODEV_TMO; nlp->nlp_flag &= ~NLP_RCV_PLOGI; - spin_unlock_irq(phba->host->host_lock); break; case NLP_JUST_DQ: break; } + spin_unlock_irq(phba->host->host_lock); + /* * We make all the calls into the transport after we have * moved the node between lists. This so that we don't @@ -1681,6 +1666,7 @@ lpfc_findnode_did(struct lpfc_hba * phba, uint32_t order, uint32_t did) struct lpfc_nodelist *ndlp, *next_ndlp; uint32_t data1; + spin_lock_irq(phba->host->host_lock); if (order & NLP_SEARCH_UNMAPPED) { list_for_each_entry_safe(ndlp, next_ndlp, &phba->fc_nlpunmap_list, nlp_listp) { @@ -1696,6 +1682,7 @@ lpfc_findnode_did(struct lpfc_hba * phba, uint32_t order, uint32_t did) phba->brd_no, ndlp, ndlp->nlp_DID, ndlp->nlp_flag, data1); + spin_unlock_irq(phba->host->host_lock); return ndlp; } } @@ -1717,6 +1704,7 @@ lpfc_findnode_did(struct lpfc_hba * phba, uint32_t order, uint32_t did) phba->brd_no, ndlp, ndlp->nlp_DID, ndlp->nlp_flag, data1); + spin_unlock_irq(phba->host->host_lock); return ndlp; } } @@ -1739,6 +1727,7 @@ lpfc_findnode_did(struct lpfc_hba * phba, uint32_t order, uint32_t did) phba->brd_no, ndlp, ndlp->nlp_DID, ndlp->nlp_flag, data1); + spin_unlock_irq(phba->host->host_lock); return ndlp; } } @@ -1783,6 +1772,7 @@ lpfc_findnode_did(struct lpfc_hba * phba, uint32_t order, uint32_t did) phba->brd_no, ndlp, ndlp->nlp_DID, ndlp->nlp_flag, data1); + spin_unlock_irq(phba->host->host_lock); return ndlp; } } @@ -1827,6 +1817,7 @@ lpfc_findnode_did(struct lpfc_hba * phba, uint32_t order, uint32_t did) phba->brd_no, ndlp, ndlp->nlp_DID, ndlp->nlp_flag, data1); + spin_unlock_irq(phba->host->host_lock); return ndlp; } } @@ -1849,11 +1840,14 @@ lpfc_findnode_did(struct lpfc_hba * phba, uint32_t order, uint32_t did) phba->brd_no, ndlp, ndlp->nlp_DID, ndlp->nlp_flag, data1); + spin_unlock_irq(phba->host->host_lock); return ndlp; } } } + spin_unlock_irq(phba->host->host_lock); + /* FIND node did NOT FOUND */ lpfc_printf_log(phba, KERN_INFO, @@ -1895,9 +1889,7 @@ lpfc_setup_disc_node(struct lpfc_hba * phba, uint32_t did) */ if (ndlp->nlp_flag & NLP_DELAY_TMO) { ndlp->nlp_flag &= ~NLP_DELAY_TMO; - spin_unlock_irq(phba->host->host_lock); del_timer_sync(&ndlp->nlp_delayfunc); - spin_lock_irq(phba->host->host_lock); if (!list_empty(&ndlp->els_retry_evt. evt_listp)) list_del_init(&ndlp->els_retry_evt. @@ -2513,11 +2505,14 @@ lpfc_findnode_rpi(struct lpfc_hba * phba, uint16_t rpi) &phba->fc_reglogin_list}; int i; + spin_lock_irq(phba->host->host_lock); for (i = 0; i < ARRAY_SIZE(lists); i++ ) list_for_each_entry(ndlp, lists[i], nlp_listp) - if (ndlp->nlp_rpi == rpi) + if (ndlp->nlp_rpi == rpi) { + spin_unlock_irq(phba->host->host_lock); return ndlp; - + } + spin_unlock_irq(phba->host->host_lock); return NULL; }