/*******************************************************************
* This file is part of the Emulex Linux Device Driver for *
* Fibre Channel Host Bus Adapters. *
- * Copyright (C) 2004-2007 Emulex. All rights reserved. *
+ * Copyright (C) 2004-2008 Emulex. All rights reserved. *
* EMULEX and SLI are trademarks of Emulex. *
* www.emulex.com *
* Portions Copyright (C) 2004-2005 Christoph Hellwig *
};
static void lpfc_disc_timeout_handler(struct lpfc_vport *);
+static void lpfc_disc_flush_list(struct lpfc_vport *vport);
void
lpfc_terminate_rport_io(struct fc_rport *rport)
struct lpfc_nodelist * ndlp;
struct lpfc_vport *vport;
struct lpfc_hba *phba;
- struct completion devloss_compl;
struct lpfc_work_evt *evtp;
+ int put_node;
+ int put_rport;
rdata = rport->dd_data;
ndlp = rdata->pnode;
-
- if (!ndlp) {
- if (rport->scsi_target_id != -1) {
- printk(KERN_ERR "Cannot find remote node"
- " for rport in dev_loss_tmo_callbk x%x\n",
- rport->port_id);
- }
+ if (!ndlp)
return;
- }
vport = ndlp->vport;
phba = vport->phba;
"rport devlosscb: sid:x%x did:x%x flg:x%x",
ndlp->nlp_sid, ndlp->nlp_DID, ndlp->nlp_flag);
- init_completion(&devloss_compl);
+ /* Don't defer this if we are in the process of deleting the vport
+ * or unloading the driver. The unload will cleanup the node
+ * appropriately we just need to cleanup the ndlp rport info here.
+ */
+ if (vport->load_flag & FC_UNLOADING) {
+ 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);
+ return;
+ }
+
+ if (ndlp->nlp_state == NLP_STE_MAPPED_NODE)
+ return;
+
evtp = &ndlp->dev_loss_evt;
if (!list_empty(&evtp->evt_listp))
return;
spin_lock_irq(&phba->hbalock);
- evtp->evt_arg1 = ndlp;
- evtp->evt_arg2 = &devloss_compl;
+ /* We need to hold the node by incrementing the reference
+ * count until this queued work is done
+ */
+ evtp->evt_arg1 = lpfc_nlp_get(ndlp);
evtp->evt = LPFC_EVT_DEV_LOSS;
list_add_tail(&evtp->evt_listp, &phba->work_list);
if (phba->work_wait)
spin_unlock_irq(&phba->hbalock);
- wait_for_completion(&devloss_compl);
-
return;
}
* This function is called from the worker thread when dev_loss_tmo
* expire.
*/
-void
+static void
lpfc_dev_loss_tmo_handler(struct lpfc_nodelist *ndlp)
{
struct lpfc_rport_data *rdata;
struct lpfc_vport *vport;
struct lpfc_hba *phba;
uint8_t *name;
+ int put_node;
+ int put_rport;
int warn_on = 0;
rport = ndlp->rport;
"rport devlosstmo:did:x%x type:x%x id:x%x",
ndlp->nlp_DID, ndlp->nlp_type, rport->scsi_target_id);
- if (!(vport->load_flag & FC_UNLOADING) &&
- ndlp->nlp_state == NLP_STE_MAPPED_NODE)
+ /* Don't defer this if we are in the process of deleting the vport
+ * or unloading the driver. The unload will cleanup the node
+ * appropriately we just need to cleanup the ndlp rport info here.
+ */
+ if (vport->load_flag & FC_UNLOADING) {
+ if (ndlp->nlp_sid != NLP_NO_SID) {
+ /* flush the target */
+ lpfc_sli_abort_iocb(vport,
+ &phba->sli.ring[phba->sli.fcp_ring],
+ ndlp->nlp_sid, 0, LPFC_CTX_TGT);
+ }
+ 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);
return;
+ }
- if (ndlp->nlp_type & NLP_FABRIC) {
- int put_node;
- int put_rport;
+ if (ndlp->nlp_state == NLP_STE_MAPPED_NODE)
+ return;
+ if (ndlp->nlp_type & NLP_FABRIC) {
/* We will clean up these Nodes in linkup */
put_node = rdata->pnode != NULL;
put_rport = ndlp->rport != NULL;
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))
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);
- }
}
{
struct lpfc_work_evt *evtp = NULL;
struct lpfc_nodelist *ndlp;
- struct lpfc_vport *vport;
int free_evt;
spin_lock_irq(&phba->hbalock);
spin_unlock_irq(&phba->hbalock);
free_evt = 1;
switch (evtp->evt) {
- case LPFC_EVT_DEV_LOSS_DELAY:
- free_evt = 0; /* evt is part of ndlp */
- ndlp = (struct lpfc_nodelist *) (evtp->evt_arg1);
- vport = ndlp->vport;
- if (!vport)
- break;
-
- lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_RPORT,
- "rport devlossdly:did:x%x flg:x%x",
- ndlp->nlp_DID, ndlp->nlp_flag, 0);
-
- if (!(vport->load_flag & FC_UNLOADING) &&
- !(ndlp->nlp_flag & NLP_DELAY_TMO) &&
- !(ndlp->nlp_flag & NLP_NPR_2B_DISC)) {
- lpfc_disc_state_machine(vport, ndlp, NULL,
- NLP_EVT_DEVICE_RM);
- }
- break;
case LPFC_EVT_ELS_RETRY:
ndlp = (struct lpfc_nodelist *) (evtp->evt_arg1);
lpfc_els_retry_delay_handler(ndlp);
free_evt = 0; /* evt is part of ndlp */
+ /* decrement the node reference count held
+ * for this queued work
+ */
+ lpfc_nlp_put(ndlp);
break;
case LPFC_EVT_DEV_LOSS:
ndlp = (struct lpfc_nodelist *)(evtp->evt_arg1);
- lpfc_nlp_get(ndlp);
lpfc_dev_loss_tmo_handler(ndlp);
free_evt = 0;
- complete((struct completion *)(evtp->evt_arg2));
+ /* decrement the node reference count held for
+ * this queued work
+ */
lpfc_nlp_put(ndlp);
break;
case LPFC_EVT_ONLINE:
lpfc_handle_latt(phba);
vports = lpfc_create_vport_work_array(phba);
if (vports != NULL)
- for(i = 0; i < LPFC_MAX_VPORTS; i++) {
+ for(i = 0; i <= phba->max_vpi; i++) {
/*
* We could have no vports in array if unloading, so if
* this happens then just use the pport
vport->work_port_events &= ~work_port_events;
spin_unlock_irq(&vport->work_port_lock);
}
- lpfc_destroy_vport_work_array(vports);
+ lpfc_destroy_vport_work_array(phba, vports);
pring = &phba->sli.ring[LPFC_ELS_RING];
status = (ha_copy & (HA_RXMASK << (4*LPFC_ELS_RING)));
status >>= (4*LPFC_ELS_RING);
if ((status & HA_RXMASK)
|| (pring->flag & LPFC_DEFERRED_RING_EVENT)) {
- if (pring->flag & LPFC_STOP_IOCB_MASK) {
+ if (pring->flag & LPFC_STOP_IOCB_EVENT) {
pring->flag |= LPFC_DEFERRED_RING_EVENT;
} else {
lpfc_sli_handle_slow_ring_event(phba, pring,
void
lpfc_cleanup_rpis(struct lpfc_vport *vport, int remove)
{
+ struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
struct lpfc_hba *phba = vport->phba;
struct lpfc_nodelist *ndlp, *next_ndlp;
int rc;
list_for_each_entry_safe(ndlp, next_ndlp, &vport->fc_nodes, nlp_listp) {
+ if (!NLP_CHK_NODE_ACT(ndlp))
+ continue;
if (ndlp->nlp_state == NLP_STE_UNUSED_NODE)
continue;
-
- if (phba->sli3_options & LPFC_SLI3_VPORT_TEARDOWN)
+ if ((phba->sli3_options & LPFC_SLI3_VPORT_TEARDOWN) ||
+ ((vport->port_type == LPFC_NPIV_PORT) &&
+ (ndlp->nlp_DID == NameServer_DID)))
lpfc_unreg_rpi(vport, ndlp);
/* Leave Fabric nodes alone on link down */
}
if (phba->sli3_options & LPFC_SLI3_VPORT_TEARDOWN) {
lpfc_mbx_unreg_vpi(vport);
+ spin_lock_irq(shost->host_lock);
vport->fc_flag |= FC_VPORT_NEEDS_REG_VPI;
+ spin_unlock_irq(shost->host_lock);
}
}
+void
+lpfc_port_link_failure(struct lpfc_vport *vport)
+{
+ /* Cleanup any outstanding RSCN activity */
+ lpfc_els_flush_rscn(vport);
+
+ /* Cleanup any outstanding ELS commands */
+ lpfc_els_flush_cmd(vport);
+
+ lpfc_cleanup_rpis(vport, 0);
+
+ /* Turn off discovery timer if its running */
+ lpfc_can_disctmo(vport);
+}
+
static void
lpfc_linkdown_port(struct lpfc_vport *vport)
{
- struct lpfc_nodelist *ndlp, *next_ndlp;
struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
fc_host_post_event(shost, fc_get_event_number(), FCH_EVT_LINKDOWN, 0);
"Link Down: state:x%x rtry:x%x flg:x%x",
vport->port_state, vport->fc_ns_retry, vport->fc_flag);
- /* Cleanup any outstanding RSCN activity */
- lpfc_els_flush_rscn(vport);
-
- /* Cleanup any outstanding ELS commands */
- lpfc_els_flush_cmd(vport);
+ lpfc_port_link_failure(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);
}
int
LPFC_MBOXQ_t *mb;
int i;
- if (phba->link_state == LPFC_LINK_DOWN) {
+ if (phba->link_state == LPFC_LINK_DOWN)
return 0;
- }
spin_lock_irq(&phba->hbalock);
if (phba->link_state > LPFC_LINK_DOWN) {
phba->link_state = LPFC_LINK_DOWN;
spin_unlock_irq(&phba->hbalock);
vports = lpfc_create_vport_work_array(phba);
if (vports != NULL)
- for(i = 0; i < LPFC_MAX_VPORTS && vports[i] != NULL; i++) {
+ for(i = 0; i <= phba->max_vpi && vports[i] != NULL; i++) {
/* Issue a LINK DOWN event to all nodes */
lpfc_linkdown_port(vports[i]);
}
- lpfc_destroy_vport_work_array(vports);
+ lpfc_destroy_vport_work_array(phba, vports);
/* Clean up any firmware default rpi's */
mb = mempool_alloc(phba->mbox_mem_pool, GFP_KERNEL);
if (mb) {
lpfc_unreg_did(phba, 0xffff, 0xffffffff, mb);
mb->vport = vport;
mb->mbox_cmpl = lpfc_sli_def_mbox_cmpl;
- if (lpfc_sli_issue_mbox(phba, mb, (MBX_NOWAIT | MBX_STOP_IOCB))
+ if (lpfc_sli_issue_mbox(phba, mb, MBX_NOWAIT)
== MBX_NOT_FINISHED) {
mempool_free(mb, phba->mbox_mem_pool);
}
lpfc_config_link(phba, mb);
mb->mbox_cmpl = lpfc_sli_def_mbox_cmpl;
mb->vport = vport;
- if (lpfc_sli_issue_mbox(phba, mb,
- (MBX_NOWAIT | MBX_STOP_IOCB))
+ if (lpfc_sli_issue_mbox(phba, mb, MBX_NOWAIT)
== MBX_NOT_FINISHED) {
mempool_free(mb, phba->mbox_mem_pool);
}
struct lpfc_nodelist *ndlp;
list_for_each_entry(ndlp, &vport->fc_nodes, nlp_listp) {
+ if (!NLP_CHK_NODE_ACT(ndlp))
+ continue;
if (ndlp->nlp_state == NLP_STE_UNUSED_NODE)
continue;
-
if (ndlp->nlp_type & NLP_FABRIC) {
- /* On Linkup its safe to clean up the ndlp
- * from Fabric connections.
- */
+ /* On Linkup its safe to clean up the ndlp
+ * from Fabric connections.
+ */
if (ndlp->nlp_DID != Fabric_DID)
lpfc_unreg_rpi(vport, ndlp);
lpfc_nlp_set_state(vport, ndlp, NLP_STE_NPR_NODE);
} else if (!(ndlp->nlp_flag & NLP_NPR_ADISC)) {
- /* Fail outstanding IO now since device is
- * marked for PLOGI.
- */
+ /* Fail outstanding IO now since device is
+ * marked for PLOGI.
+ */
lpfc_unreg_rpi(vport, ndlp);
}
}
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)
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
vports = lpfc_create_vport_work_array(phba);
if (vports != NULL)
- for(i = 0; i < LPFC_MAX_VPORTS && vports[i] != NULL; i++)
+ for(i = 0; i <= phba->max_vpi && vports[i] != NULL; i++)
lpfc_linkup_port(vports[i]);
- lpfc_destroy_vport_work_array(vports);
+ lpfc_destroy_vport_work_array(phba, vports);
if (phba->sli3_options & LPFC_SLI3_NPIV_ENABLED)
lpfc_issue_clear_la(phba, phba->pport);
* as the completion routine when the command is
* handed off to the SLI layer.
*/
-void
+static void
lpfc_mbx_cmpl_clear_la(struct lpfc_hba *phba, LPFC_MBOXQ_t *pmb)
{
struct lpfc_vport *vport = pmb->vport;
writel(control, phba->HCregaddr);
readl(phba->HCregaddr); /* flush */
spin_unlock_irq(&phba->hbalock);
+ mempool_free(pmb, phba->mbox_mem_pool);
return;
- vport->num_disc_nodes = 0;
- /* go thru NPR nodes and issue ELS PLOGIs */
- if (vport->fc_npr_cnt)
- lpfc_els_disc_plogi(vport);
-
- if (!vport->num_disc_nodes) {
- spin_lock_irq(shost->host_lock);
- vport->fc_flag &= ~FC_NDISC_ACTIVE;
- spin_unlock_irq(shost->host_lock);
- }
-
- vport->port_state = LPFC_VPORT_READY;
-
out:
/* Device Discovery completes */
lpfc_printf_vlog(vport, KERN_INFO, LOG_DISCOVERY,
* LPFC_FLOGI while waiting for FLOGI cmpl
*/
if (vport->port_state != LPFC_FLOGI) {
- vport->port_state = LPFC_FLOGI;
- lpfc_set_disctmo(vport);
lpfc_initial_flogi(vport);
}
return;
lpfc_read_sparam(phba, sparam_mbox, 0);
sparam_mbox->vport = vport;
sparam_mbox->mbox_cmpl = lpfc_mbx_cmpl_read_sparam;
- rc = lpfc_sli_issue_mbox(phba, sparam_mbox,
- (MBX_NOWAIT | MBX_STOP_IOCB));
+ rc = lpfc_sli_issue_mbox(phba, sparam_mbox, MBX_NOWAIT);
if (rc == MBX_NOT_FINISHED) {
mp = (struct lpfc_dmabuf *) sparam_mbox->context1;
lpfc_mbuf_free(phba, mp->virt, mp->phys);
lpfc_config_link(phba, cfglink_mbox);
cfglink_mbox->vport = vport;
cfglink_mbox->mbox_cmpl = lpfc_mbx_cmpl_local_config_link;
- rc = lpfc_sli_issue_mbox(phba, cfglink_mbox,
- (MBX_NOWAIT | MBX_STOP_IOCB));
+ rc = lpfc_sli_issue_mbox(phba, cfglink_mbox, MBX_NOWAIT);
if (rc != MBX_NOT_FINISHED)
return;
mempool_free(cfglink_mbox, phba->mbox_mem_pool);
if (la->attType == AT_LINK_UP) {
phba->fc_stat.LinkUp++;
if (phba->link_flag & LS_LOOPBACK_MODE) {
- lpfc_printf_log(phba, KERN_INFO, LOG_LINK_EVENT,
+ lpfc_printf_log(phba, KERN_ERR, LOG_LINK_EVENT,
"1306 Link Up Event in loop back mode "
"x%x received Data: x%x x%x x%x x%x\n",
la->eventTag, phba->fc_eventTag,
lpfc_mbx_process_link_up(phba, la);
} else {
phba->fc_stat.LinkDown++;
- lpfc_printf_log(phba, KERN_ERR, LOG_LINK_EVENT,
+ if (phba->link_flag & LS_LOOPBACK_MODE) {
+ lpfc_printf_log(phba, KERN_ERR, LOG_LINK_EVENT,
+ "1308 Link Down Event in loop back mode "
+ "x%x received "
+ "Data: x%x x%x x%x\n",
+ la->eventTag, phba->fc_eventTag,
+ phba->pport->port_state, vport->fc_flag);
+ }
+ else {
+ lpfc_printf_log(phba, KERN_ERR, LOG_LINK_EVENT,
"1305 Link Down Event x%x received "
"Data: x%x x%x x%x\n",
la->eventTag, phba->fc_eventTag,
phba->pport->port_state, vport->fc_flag);
+ }
lpfc_mbx_issue_link_down(phba);
}
lpfc_mbuf_free(phba, mp->virt, mp->phys);
kfree(mp);
mempool_free(pmb, phba->mbox_mem_pool);
+ /* decrement the node reference count held for this callback
+ * function.
+ */
lpfc_nlp_put(ndlp);
return;
lpfc_unreg_vpi(phba, vport->vpi, mbox);
mbox->vport = vport;
mbox->mbox_cmpl = lpfc_mbx_cmpl_unreg_vpi;
- rc = lpfc_sli_issue_mbox(phba, mbox, (MBX_NOWAIT | MBX_STOP_IOCB));
+ rc = lpfc_sli_issue_mbox(phba, mbox, MBX_NOWAIT);
if (rc == MBX_NOT_FINISHED) {
lpfc_printf_vlog(vport, KERN_ERR, LOG_MBOX | LOG_VPORT,
"1800 Could not issue unreg_vpi\n");
lpfc_mbuf_free(phba, mp->virt, mp->phys);
kfree(mp);
mempool_free(pmb, phba->mbox_mem_pool);
- lpfc_nlp_put(ndlp);
if (phba->fc_topology == TOPOLOGY_LOOP) {
/* FLOGI failed, use loop map to make discovery list */
/* Start discovery */
lpfc_disc_start(vport);
+ /* Decrement the reference count to ndlp after the
+ * reference to the ndlp are done.
+ */
+ lpfc_nlp_put(ndlp);
return;
}
lpfc_printf_vlog(vport, KERN_ERR, LOG_MBOX,
"0258 Register Fabric login error: 0x%x\n",
mb->mbxStatus);
+ /* Decrement the reference count to ndlp after the reference
+ * to the ndlp are done.
+ */
+ lpfc_nlp_put(ndlp);
return;
}
ndlp->nlp_type |= NLP_FABRIC;
lpfc_nlp_set_state(vport, ndlp, NLP_STE_UNMAPPED_NODE);
- lpfc_nlp_put(ndlp); /* Drop the reference from the mbox */
-
if (vport->port_state == LPFC_FABRIC_CFG_LINK) {
vports = lpfc_create_vport_work_array(phba);
if (vports != NULL)
for(i = 0;
- i < LPFC_MAX_VPORTS && vports[i] != NULL;
+ i <= phba->max_vpi && vports[i] != NULL;
i++) {
if (vports[i]->port_type == LPFC_PHYSICAL_PORT)
continue;
"Fabric support\n");
}
}
- lpfc_destroy_vport_work_array(vports);
+ lpfc_destroy_vport_work_array(phba, vports);
lpfc_do_scr_ns_plogi(phba, vport);
}
lpfc_mbuf_free(phba, mp->virt, mp->phys);
kfree(mp);
mempool_free(pmb, phba->mbox_mem_pool);
+
+ /* Drop the reference count from the mbox at the end after
+ * all the current reference to the ndlp have been done.
+ */
+ lpfc_nlp_put(ndlp);
return;
}
if (mb->mbxStatus) {
out:
+ /* decrement the node reference count held for this
+ * callback function.
+ */
lpfc_nlp_put(ndlp);
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) {
/*
goto out;
}
+ /* decrement the node reference count held for this
+ * callback function.
+ */
lpfc_nlp_put(ndlp);
lpfc_mbuf_free(phba, mp->virt, mp->phys);
kfree(mp);
* registered the port.
*/
if (ndlp->rport && ndlp->rport->dd_data &&
- ((struct lpfc_rport_data *) ndlp->rport->dd_data)->pnode == ndlp) {
+ ((struct lpfc_rport_data *) ndlp->rport->dd_data)->pnode == ndlp)
lpfc_nlp_put(ndlp);
- }
lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_RPORT,
"rport add: did:x%x flg:x%x type x%x",
lpfc_nlp_state_cleanup(vport, ndlp, old_state, state);
}
+void
+lpfc_enqueue_node(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp)
+{
+ struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
+
+ if (list_empty(&ndlp->nlp_listp)) {
+ spin_lock_irq(shost->host_lock);
+ list_add_tail(&ndlp->nlp_listp, &vport->fc_nodes);
+ spin_unlock_irq(shost->host_lock);
+ }
+}
+
void
lpfc_dequeue_node(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp)
{
list_del_init(&ndlp->nlp_listp);
spin_unlock_irq(shost->host_lock);
lpfc_nlp_state_cleanup(vport, ndlp, ndlp->nlp_state,
- NLP_STE_UNUSED_NODE);
+ NLP_STE_UNUSED_NODE);
+}
+
+static void
+lpfc_disable_node(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp)
+{
+ if ((ndlp->nlp_flag & NLP_DELAY_TMO) != 0)
+ lpfc_cancel_retry_delay_tmo(vport, ndlp);
+ if (ndlp->nlp_state && !list_empty(&ndlp->nlp_listp))
+ lpfc_nlp_counters(vport, ndlp->nlp_state, -1);
+ lpfc_nlp_state_cleanup(vport, ndlp, ndlp->nlp_state,
+ NLP_STE_UNUSED_NODE);
+}
+
+struct lpfc_nodelist *
+lpfc_enable_node(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
+ int state)
+{
+ struct lpfc_hba *phba = vport->phba;
+ uint32_t did;
+ unsigned long flags;
+
+ if (!ndlp)
+ return NULL;
+
+ spin_lock_irqsave(&phba->ndlp_lock, flags);
+ /* The ndlp should not be in memory free mode */
+ if (NLP_CHK_FREE_REQ(ndlp)) {
+ spin_unlock_irqrestore(&phba->ndlp_lock, flags);
+ lpfc_printf_vlog(vport, KERN_WARNING, LOG_NODE,
+ "0277 lpfc_enable_node: ndlp:x%p "
+ "usgmap:x%x refcnt:%d\n",
+ (void *)ndlp, ndlp->nlp_usg_map,
+ atomic_read(&ndlp->kref.refcount));
+ return NULL;
+ }
+ /* The ndlp should not already be in active mode */
+ if (NLP_CHK_NODE_ACT(ndlp)) {
+ spin_unlock_irqrestore(&phba->ndlp_lock, flags);
+ lpfc_printf_vlog(vport, KERN_WARNING, LOG_NODE,
+ "0278 lpfc_enable_node: ndlp:x%p "
+ "usgmap:x%x refcnt:%d\n",
+ (void *)ndlp, ndlp->nlp_usg_map,
+ atomic_read(&ndlp->kref.refcount));
+ return NULL;
+ }
+
+ /* Keep the original DID */
+ did = ndlp->nlp_DID;
+
+ /* re-initialize ndlp except of ndlp linked list pointer */
+ memset((((char *)ndlp) + sizeof (struct list_head)), 0,
+ sizeof (struct lpfc_nodelist) - sizeof (struct list_head));
+ INIT_LIST_HEAD(&ndlp->els_retry_evt.evt_listp);
+ INIT_LIST_HEAD(&ndlp->dev_loss_evt.evt_listp);
+ init_timer(&ndlp->nlp_delayfunc);
+ ndlp->nlp_delayfunc.function = lpfc_els_retry_delay;
+ ndlp->nlp_delayfunc.data = (unsigned long)ndlp;
+ ndlp->nlp_DID = did;
+ ndlp->vport = vport;
+ ndlp->nlp_sid = NLP_NO_SID;
+ /* ndlp management re-initialize */
+ kref_init(&ndlp->kref);
+ NLP_INT_NODE_ACT(ndlp);
+
+ spin_unlock_irqrestore(&phba->ndlp_lock, flags);
+
+ if (state != NLP_STE_UNUSED_NODE)
+ lpfc_nlp_set_state(vport, ndlp, state);
+
+ lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_NODE,
+ "node enable: did:x%x",
+ ndlp->nlp_DID, 0, 0);
+ return 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 marked as UNUSED on the list
+ * until ALL other outstanding threads have completed. We check
+ * that the ndlp not already in the UNUSED state before we proceed.
+ */
+ if (ndlp->nlp_state == NLP_STE_UNUSED_NODE)
+ return;
lpfc_nlp_set_state(vport, ndlp, NLP_STE_UNUSED_NODE);
lpfc_nlp_put(ndlp);
+ return;
}
/*
lpfc_unreg_login(phba, vport->vpi, ndlp->nlp_rpi, mbox);
mbox->vport = vport;
mbox->mbox_cmpl = lpfc_sli_def_mbox_cmpl;
- rc = lpfc_sli_issue_mbox(phba, mbox,
- (MBX_NOWAIT | MBX_STOP_IOCB));
+ rc = lpfc_sli_issue_mbox(phba, mbox, MBX_NOWAIT);
if (rc == MBX_NOT_FINISHED)
mempool_free(mbox, phba->mbox_mem_pool);
}
lpfc_unreg_login(phba, vport->vpi, 0xffff, mbox);
mbox->vport = vport;
mbox->mbox_cmpl = lpfc_sli_def_mbox_cmpl;
- rc = lpfc_sli_issue_mbox(phba, mbox,
- (MBX_NOWAIT | MBX_STOP_IOCB));
+ mbox->context1 = NULL;
+ rc = lpfc_sli_issue_mbox_wait(phba, mbox, LPFC_MBOX_TMO);
if (rc == MBX_NOT_FINISHED) {
mempool_free(mbox, phba->mbox_mem_pool);
}
lpfc_unreg_did(phba, vport->vpi, 0xffffffff, mbox);
mbox->vport = vport;
mbox->mbox_cmpl = lpfc_sli_def_mbox_cmpl;
- rc = lpfc_sli_issue_mbox(phba, mbox,
- (MBX_NOWAIT | MBX_STOP_IOCB));
+ mbox->context1 = NULL;
+ rc = lpfc_sli_issue_mbox_wait(phba, mbox, LPFC_MBOX_TMO);
if (rc == MBX_NOT_FINISHED) {
lpfc_printf_vlog(vport, KERN_ERR, LOG_MBOX | LOG_VPORT,
"1815 Could not issue "
"Data: x%x x%x x%x\n",
ndlp->nlp_DID, ndlp->nlp_flag,
ndlp->nlp_state, ndlp->nlp_rpi);
- lpfc_dequeue_node(vport, ndlp);
+ if (NLP_CHK_FREE_REQ(ndlp)) {
+ lpfc_printf_vlog(vport, KERN_WARNING, LOG_NODE,
+ "0280 lpfc_cleanup_node: ndlp:x%p "
+ "usgmap:x%x refcnt:%d\n",
+ (void *)ndlp, ndlp->nlp_usg_map,
+ atomic_read(&ndlp->kref.refcount));
+ lpfc_dequeue_node(vport, ndlp);
+ } else {
+ lpfc_printf_vlog(vport, KERN_WARNING, LOG_NODE,
+ "0281 lpfc_cleanup_node: ndlp:x%p "
+ "usgmap:x%x refcnt:%d\n",
+ (void *)ndlp, ndlp->nlp_usg_map,
+ atomic_read(&ndlp->kref.refcount));
+ lpfc_disable_node(vport, ndlp);
+ }
/* cleanup any ndlp on mbox q waiting for reglogin cmpl */
if ((mb = phba->sli.mbox_active)) {
}
list_del(&mb->list);
mempool_free(mb, phba->mbox_mem_pool);
- lpfc_nlp_put(ndlp);
+ /* We shall not invoke the lpfc_nlp_put to decrement
+ * the ndlp reference count as we are in the process
+ * of lpfc_nlp_release.
+ */
}
}
spin_unlock_irq(&phba->hbalock);
- lpfc_els_abort(phba,ndlp);
+ lpfc_els_abort(phba, ndlp);
+
spin_lock_irq(shost->host_lock);
ndlp->nlp_flag &= ~NLP_DELAY_TMO;
spin_unlock_irq(shost->host_lock);
if (!list_empty(&ndlp->dev_loss_evt.evt_listp))
list_del_init(&ndlp->dev_loss_evt.evt_listp);
- if (!list_empty(&ndlp->dev_loss_evt.evt_listp)) {
- list_del_init(&ndlp->dev_loss_evt.evt_listp);
- complete((struct completion *)(ndlp->dev_loss_evt.evt_arg2));
- }
-
lpfc_unreg_rpi(vport, ndlp);
return 0;
static void
lpfc_nlp_remove(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp)
{
+ struct lpfc_hba *phba = vport->phba;
struct lpfc_rport_data *rdata;
+ LPFC_MBOXQ_t *mbox;
+ int rc;
if (ndlp->nlp_flag & NLP_DELAY_TMO) {
lpfc_cancel_retry_delay_tmo(vport, ndlp);
}
+ if (ndlp->nlp_flag & NLP_DEFER_RM && !ndlp->nlp_rpi) {
+ /* For this case we need to cleanup the default rpi
+ * allocated by the firmware.
+ */
+ if ((mbox = mempool_alloc(phba->mbox_mem_pool, GFP_KERNEL))
+ != NULL) {
+ rc = lpfc_reg_login(phba, vport->vpi, ndlp->nlp_DID,
+ (uint8_t *) &vport->fc_sparam, mbox, 0);
+ if (rc) {
+ mempool_free(mbox, phba->mbox_mem_pool);
+ }
+ else {
+ mbox->mbox_flag |= LPFC_MBX_IMED_UNREG;
+ mbox->mbox_cmpl = lpfc_mbx_cmpl_dflt_rpi;
+ mbox->vport = vport;
+ mbox->context2 = NULL;
+ rc =lpfc_sli_issue_mbox(phba, mbox, MBX_NOWAIT);
+ if (rc == MBX_NOT_FINISHED) {
+ mempool_free(mbox, phba->mbox_mem_pool);
+ }
+ }
+ }
+ }
lpfc_cleanup_node(vport, ndlp);
/*
ndlp->nlp_flag |= NLP_NPR_2B_DISC;
spin_unlock_irq(shost->host_lock);
return ndlp;
+ } else if (!NLP_CHK_NODE_ACT(ndlp)) {
+ ndlp = lpfc_enable_node(vport, ndlp, NLP_STE_NPR_NODE);
+ if (!ndlp)
+ return NULL;
+ spin_lock_irq(shost->host_lock);
+ ndlp->nlp_flag |= NLP_NPR_2B_DISC;
+ spin_unlock_irq(shost->host_lock);
+ return ndlp;
}
+
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);
} 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);
lpfc_clear_la(phba, mbox);
mbox->mbox_cmpl = lpfc_mbx_cmpl_clear_la;
mbox->vport = vport;
- rc = lpfc_sli_issue_mbox(phba, mbox, (MBX_NOWAIT |
- MBX_STOP_IOCB));
+ rc = lpfc_sli_issue_mbox(phba, mbox, MBX_NOWAIT);
if (rc == MBX_NOT_FINISHED) {
mempool_free(mbox, phba->mbox_mem_pool);
lpfc_disc_flush_list(vport);
lpfc_reg_vpi(phba, vport->vpi, vport->fc_myDID, regvpimbox);
regvpimbox->mbox_cmpl = lpfc_mbx_cmpl_reg_vpi;
regvpimbox->vport = vport;
- if (lpfc_sli_issue_mbox(phba, regvpimbox,
- (MBX_NOWAIT | MBX_STOP_IOCB))
+ if (lpfc_sli_issue_mbox(phba, regvpimbox, MBX_NOWAIT)
== MBX_NOT_FINISHED) {
mempool_free(regvpimbox, phba->mbox_mem_pool);
}
* continue discovery.
*/
if ((phba->sli3_options & LPFC_SLI3_NPIV_ENABLED) &&
+ !(vport->fc_flag & FC_PT2PT) &&
!(vport->fc_flag & FC_RSCN_MODE)) {
lpfc_issue_reg_vpi(phba, vport);
return;
}
}
-void
+static void
lpfc_disc_flush_list(struct lpfc_vport *vport)
{
struct lpfc_nodelist *ndlp, *next_ndlp;
if (vport->fc_plogi_cnt || vport->fc_adisc_cnt) {
list_for_each_entry_safe(ndlp, next_ndlp, &vport->fc_nodes,
nlp_listp) {
+ if (!NLP_CHK_NODE_ACT(ndlp))
+ continue;
if (ndlp->nlp_state == NLP_STE_PLOGI_ISSUE ||
ndlp->nlp_state == NLP_STE_ADISC_ISSUE) {
lpfc_free_tx(phba, ndlp);
- lpfc_nlp_put(ndlp);
}
}
}
/* Start discovery by sending FLOGI, clean up old rpis */
list_for_each_entry_safe(ndlp, next_ndlp, &vport->fc_nodes,
nlp_listp) {
+ if (!NLP_CHK_NODE_ACT(ndlp))
+ continue;
if (ndlp->nlp_state != NLP_STE_NPR_NODE)
continue;
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.
}
}
if (vport->port_state != LPFC_FLOGI) {
- vport->port_state = LPFC_FLOGI;
- lpfc_set_disctmo(vport);
lpfc_initial_flogi(vport);
+ return;
}
break;
/* 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.
"NameServer login\n");
/* 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;
+ if (ndlp && NLP_CHK_NODE_ACT(ndlp))
+ lpfc_els_abort(phba, ndlp);
+
+ /* ReStart discovery */
+ goto restart_disc;
case LPFC_NS_QRY:
/* Check for wait for NameServer Rsp timeout */
}
vport->fc_ns_retry = 0;
+restart_disc:
/*
* Discovery is over.
* set port_state to PORT_READY if SLI2.
initlinkmbox->mb.un.varInitLnk.lipsr_AL_PA = 0;
initlinkmbox->vport = vport;
initlinkmbox->mbox_cmpl = lpfc_sli_def_mbox_cmpl;
- rc = lpfc_sli_issue_mbox(phba, initlinkmbox,
- (MBX_NOWAIT | MBX_STOP_IOCB));
+ rc = lpfc_sli_issue_mbox(phba, initlinkmbox, MBX_NOWAIT);
lpfc_set_loopback_flag(phba);
if (rc == MBX_NOT_FINISHED)
mempool_free(initlinkmbox, phba->mbox_mem_pool);
clrlaerr = 1;
break;
+ case LPFC_LINK_UP:
+ lpfc_issue_clear_la(phba, vport);
+ /* Drop thru */
case LPFC_LINK_UNKNOWN:
case LPFC_WARM_START:
case LPFC_INIT_START:
case LPFC_INIT_MBX_CMDS:
case LPFC_LINK_DOWN:
- case LPFC_LINK_UP:
case LPFC_HBA_ERROR:
lpfc_printf_vlog(vport, KERN_ERR, LOG_DISCOVERY,
"0230 Unexpected timeout, hba link "
else
mod_timer(&vport->fc_fdmitmo, jiffies + HZ * 60);
- /* Mailbox took a reference to the node */
+ /* decrement the node reference count held for this callback
+ * function.
+ */
lpfc_nlp_put(ndlp);
lpfc_mbuf_free(phba, mp->virt, mp->phys);
kfree(mp);
sizeof(ndlp->nlp_portname)) == 0;
}
-struct lpfc_nodelist *
+static struct lpfc_nodelist *
__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;
}
+#if 0
/*
* Search node lists for a remote port matching filter criteria
* Caller needs to hold host_lock before calling this routine.
spin_unlock_irq(shost->host_lock);
return ndlp;
}
+#endif /* 0 */
/*
* This routine looks up the ndlp lists for the given RPI. If rpi found it
return __lpfc_find_node(vport, lpfc_filter_by_rpi, &rpi);
}
+#if 0
struct lpfc_nodelist *
lpfc_findnode_rpi(struct lpfc_vport *vport, uint16_t rpi)
{
spin_unlock_irq(shost->host_lock);
return ndlp;
}
+#endif /* 0 */
/*
* This routine looks up the ndlp lists for the given WWPN. If WWPN found it
ndlp->nlp_sid = NLP_NO_SID;
INIT_LIST_HEAD(&ndlp->nlp_listp);
kref_init(&ndlp->kref);
+ NLP_INT_NODE_ACT(ndlp);
lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_NODE,
"node init: did:x%x",
return;
}
+/* This routine releases all resources associated with a specifc NPort's ndlp
+ * and mempool_free's the nodelist.
+ */
static void
lpfc_nlp_release(struct kref *kref)
{
+ struct lpfc_hba *phba;
+ unsigned long flags;
struct lpfc_nodelist *ndlp = container_of(kref, struct lpfc_nodelist,
kref);
"node release: did:x%x flg:x%x type:x%x",
ndlp->nlp_DID, ndlp->nlp_flag, ndlp->nlp_type);
+ lpfc_printf_vlog(ndlp->vport, KERN_INFO, LOG_NODE,
+ "0279 lpfc_nlp_release: ndlp:x%p "
+ "usgmap:x%x refcnt:%d\n",
+ (void *)ndlp, ndlp->nlp_usg_map,
+ atomic_read(&ndlp->kref.refcount));
+
+ /* remove ndlp from action. */
lpfc_nlp_remove(ndlp->vport, ndlp);
- mempool_free(ndlp, ndlp->vport->phba->nlp_mem_pool);
+
+ /* clear the ndlp active flag for all release cases */
+ phba = ndlp->vport->phba;
+ spin_lock_irqsave(&phba->ndlp_lock, flags);
+ NLP_CLR_NODE_ACT(ndlp);
+ spin_unlock_irqrestore(&phba->ndlp_lock, flags);
+
+ /* free ndlp memory for final ndlp release */
+ if (NLP_CHK_FREE_REQ(ndlp))
+ mempool_free(ndlp, ndlp->vport->phba->nlp_mem_pool);
}
+/* This routine bumps the reference count for a ndlp structure to ensure
+ * that one discovery thread won't free a ndlp while another discovery thread
+ * is using it.
+ */
struct lpfc_nodelist *
lpfc_nlp_get(struct lpfc_nodelist *ndlp)
{
- if (ndlp)
- kref_get(&ndlp->kref);
+ struct lpfc_hba *phba;
+ unsigned long flags;
+
+ if (ndlp) {
+ lpfc_debugfs_disc_trc(ndlp->vport, LPFC_DISC_TRC_NODE,
+ "node get: did:x%x flg:x%x refcnt:x%x",
+ ndlp->nlp_DID, ndlp->nlp_flag,
+ atomic_read(&ndlp->kref.refcount));
+ /* The check of ndlp usage to prevent incrementing the
+ * ndlp reference count that is in the process of being
+ * released.
+ */
+ phba = ndlp->vport->phba;
+ spin_lock_irqsave(&phba->ndlp_lock, flags);
+ if (!NLP_CHK_NODE_ACT(ndlp) || NLP_CHK_FREE_ACK(ndlp)) {
+ spin_unlock_irqrestore(&phba->ndlp_lock, flags);
+ lpfc_printf_vlog(ndlp->vport, KERN_WARNING, LOG_NODE,
+ "0276 lpfc_nlp_get: ndlp:x%p "
+ "usgmap:x%x refcnt:%d\n",
+ (void *)ndlp, ndlp->nlp_usg_map,
+ atomic_read(&ndlp->kref.refcount));
+ return NULL;
+ } else
+ kref_get(&ndlp->kref);
+ spin_unlock_irqrestore(&phba->ndlp_lock, flags);
+ }
return ndlp;
}
+/* This routine decrements the reference count for a ndlp structure. If the
+ * count goes to 0, this indicates the the associated nodelist should be
+ * freed. Returning 1 indicates the ndlp resource has been released; on the
+ * other hand, returning 0 indicates the ndlp resource has not been released
+ * yet.
+ */
int
lpfc_nlp_put(struct lpfc_nodelist *ndlp)
{
- return ndlp ? kref_put(&ndlp->kref, lpfc_nlp_release) : 0;
+ struct lpfc_hba *phba;
+ unsigned long flags;
+
+ if (!ndlp)
+ return 1;
+
+ lpfc_debugfs_disc_trc(ndlp->vport, LPFC_DISC_TRC_NODE,
+ "node put: did:x%x flg:x%x refcnt:x%x",
+ ndlp->nlp_DID, ndlp->nlp_flag,
+ atomic_read(&ndlp->kref.refcount));
+ phba = ndlp->vport->phba;
+ spin_lock_irqsave(&phba->ndlp_lock, flags);
+ /* Check the ndlp memory free acknowledge flag to avoid the
+ * possible race condition that kref_put got invoked again
+ * after previous one has done ndlp memory free.
+ */
+ if (NLP_CHK_FREE_ACK(ndlp)) {
+ spin_unlock_irqrestore(&phba->ndlp_lock, flags);
+ lpfc_printf_vlog(ndlp->vport, KERN_WARNING, LOG_NODE,
+ "0274 lpfc_nlp_put: ndlp:x%p "
+ "usgmap:x%x refcnt:%d\n",
+ (void *)ndlp, ndlp->nlp_usg_map,
+ atomic_read(&ndlp->kref.refcount));
+ return 1;
+ }
+ /* Check the ndlp inactivate log flag to avoid the possible
+ * race condition that kref_put got invoked again after ndlp
+ * is already in inactivating state.
+ */
+ if (NLP_CHK_IACT_REQ(ndlp)) {
+ spin_unlock_irqrestore(&phba->ndlp_lock, flags);
+ lpfc_printf_vlog(ndlp->vport, KERN_WARNING, LOG_NODE,
+ "0275 lpfc_nlp_put: ndlp:x%p "
+ "usgmap:x%x refcnt:%d\n",
+ (void *)ndlp, ndlp->nlp_usg_map,
+ atomic_read(&ndlp->kref.refcount));
+ return 1;
+ }
+ /* For last put, mark the ndlp usage flags to make sure no
+ * other kref_get and kref_put on the same ndlp shall get
+ * in between the process when the final kref_put has been
+ * invoked on this ndlp.
+ */
+ if (atomic_read(&ndlp->kref.refcount) == 1) {
+ /* Indicate ndlp is put to inactive state. */
+ NLP_SET_IACT_REQ(ndlp);
+ /* Acknowledge ndlp memory free has been seen. */
+ if (NLP_CHK_FREE_REQ(ndlp))
+ NLP_SET_FREE_ACK(ndlp);
+ }
+ spin_unlock_irqrestore(&phba->ndlp_lock, flags);
+ /* Note, the kref_put returns 1 when decrementing a reference
+ * count that was 1, it invokes the release callback function,
+ * but it still left the reference count as 1 (not actually
+ * performs the last decrementation). Otherwise, it actually
+ * decrements the reference count and returns 0.
+ */
+ return kref_put(&ndlp->kref, lpfc_nlp_release);
+}
+
+/* This routine free's the specified nodelist if it is not in use
+ * by any other discovery thread. This routine returns 1 if the
+ * ndlp has been freed. A return value of 0 indicates the ndlp is
+ * not yet been released.
+ */
+int
+lpfc_nlp_not_used(struct lpfc_nodelist *ndlp)
+{
+ lpfc_debugfs_disc_trc(ndlp->vport, LPFC_DISC_TRC_NODE,
+ "node not used: did:x%x flg:x%x refcnt:x%x",
+ ndlp->nlp_DID, ndlp->nlp_flag,
+ atomic_read(&ndlp->kref.refcount));
+ if (atomic_read(&ndlp->kref.refcount) == 1)
+ if (lpfc_nlp_put(ndlp))
+ return 1;
+ return 0;
}
git.samba.org / sfrench / cifs-2.6.git / blobdiff