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[PATCH] lpfc 8.1.3: Protect NPL lists with host lock
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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 <Jamie.Wellnitz@emulex.com>
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
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Jamie Wellnitz authored and James Bottomley committed Mar 6, 2006
1 parent 5fe9f51 commit 66a9ed6
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Showing 2 changed files with 26 additions and 30 deletions.
3 changes: 2 additions & 1 deletion drivers/scsi/lpfc/lpfc_els.c
View file
Original file line number Diff line number Diff line change
Expand Up @@ -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,
Expand Down
53 changes: 24 additions & 29 deletions drivers/scsi/lpfc/lpfc_hbadisc.c
View file
Original file line number Diff line number Diff line change
Expand Up @@ -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;
Expand All @@ -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;
Expand All @@ -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 <did> to <num> list */
lpfc_printf_log(phba,
Expand All @@ -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++;
Expand All @@ -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);
Expand All @@ -1239,27 +1226,25 @@ 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++;
phba->nport_event_cnt++;
/* 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);

}
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++;
Expand All @@ -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
Expand Down Expand Up @@ -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) {
Expand All @@ -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;
}
}
Expand All @@ -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;
}
}
Expand All @@ -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;
}
}
Expand Down Expand Up @@ -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;
}
}
Expand Down Expand Up @@ -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;
}
}
Expand All @@ -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 <did> NOT FOUND */
lpfc_printf_log(phba,
KERN_INFO,
Expand Down Expand Up @@ -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.
Expand Down Expand Up @@ -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;
}

Expand Down

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