Correct ndlp referencing issues:
- Fix ndlp kref issues due to race conditions between threads
- Fix cancel els delay retry event which missed an ndlp reference count
Signed-off-by: James Smart <james.smart@xxxxxxxxxx>
---
lpfc.h | 2
lpfc_attr.c | 5
lpfc_crtn.h | 6 -
lpfc_ct.c | 39 +++++--
lpfc_disc.h | 33 +++++-
lpfc_els.c | 237 +++++++++++++++++++++++++++++++-------------
lpfc_hbadisc.c | 296 +++++++++++++++++++++++++++++++++++++++++++++++--------
lpfc_init.c | 41 +++++++
lpfc_nportdisc.c | 39 +++++--
lpfc_scsi.c | 4
lpfc_vport.c | 70 +++++++++++--
11 files changed, 630 insertions(+), 142 deletions(-)
diff -upNr a/drivers/scsi/lpfc/lpfc_attr.c b/drivers/scsi/lpfc/lpfc_attr.c
--- a/drivers/scsi/lpfc/lpfc_attr.c 2008-01-14 13:06:49.000000000 -0500
+++ b/drivers/scsi/lpfc/lpfc_attr.c 2008-02-08 18:10:08.000000000 -0500
@@ -1191,7 +1191,7 @@ lpfc_update_rport_devloss_tmo(struct lpf
shost = lpfc_shost_from_vport(vport);
spin_lock_irq(shost->host_lock);
list_for_each_entry(ndlp, &vport->fc_nodes, nlp_listp)
- if (ndlp->rport)
+ if (NLP_CHK_NODE_ACT(ndlp) && ndlp->rport)
ndlp->rport->dev_loss_tmo = vport->cfg_devloss_tmo;
spin_unlock_irq(shost->host_lock);
}
@@ -2384,7 +2384,8 @@ lpfc_get_node_by_target(struct scsi_targ
spin_lock_irq(shost->host_lock);
/* Search for this, mapped, target ID */
list_for_each_entry(ndlp, &vport->fc_nodes, nlp_listp) {
- if (ndlp->nlp_state == NLP_STE_MAPPED_NODE &&
+ if (NLP_CHK_NODE_ACT(ndlp) &&
+ ndlp->nlp_state == NLP_STE_MAPPED_NODE &&
starget->id == ndlp->nlp_sid) {
spin_unlock_irq(shost->host_lock);
return ndlp;
diff -upNr a/drivers/scsi/lpfc/lpfc_crtn.h b/drivers/scsi/lpfc/lpfc_crtn.h
--- a/drivers/scsi/lpfc/lpfc_crtn.h 2008-01-14 13:06:49.000000000 -0500
+++ b/drivers/scsi/lpfc/lpfc_crtn.h 2008-02-08 18:10:08.000000000 -0500
@@ -1,7 +1,7 @@
/*******************************************************************
* 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 *
* *
@@ -53,7 +53,11 @@ void lpfc_mbx_cmpl_dflt_rpi(struct lpfc_
void lpfc_mbx_cmpl_fabric_reg_login(struct lpfc_hba *, LPFC_MBOXQ_t *);
void lpfc_mbx_cmpl_ns_reg_login(struct lpfc_hba *, LPFC_MBOXQ_t *);
void lpfc_mbx_cmpl_fdmi_reg_login(struct lpfc_hba *, LPFC_MBOXQ_t *);
+void lpfc_enqueue_node(struct lpfc_vport *, struct lpfc_nodelist *);
void lpfc_dequeue_node(struct lpfc_vport *, struct lpfc_nodelist *);
+void lpfc_disable_node(struct lpfc_vport *, struct lpfc_nodelist *);
+struct lpfc_nodelist *lpfc_enable_node(struct lpfc_vport *,
+ struct lpfc_nodelist *, int);
void lpfc_nlp_set_state(struct lpfc_vport *, struct lpfc_nodelist *, int);
void lpfc_drop_node(struct lpfc_vport *, struct lpfc_nodelist *);
void lpfc_set_disctmo(struct lpfc_vport *);
diff -upNr a/drivers/scsi/lpfc/lpfc_ct.c b/drivers/scsi/lpfc/lpfc_ct.c
--- a/drivers/scsi/lpfc/lpfc_ct.c 2008-01-14 13:06:49.000000000 -0500
+++ b/drivers/scsi/lpfc/lpfc_ct.c 2008-02-08 18:10:08.000000000 -0500
@@ -1,7 +1,7 @@
/*******************************************************************
* 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 *
* *
@@ -294,7 +294,7 @@ lpfc_gen_req(struct lpfc_vport *vport, s
/* Save for completion so we can release these resources */
geniocb->context1 = (uint8_t *) inp;
geniocb->context2 = (uint8_t *) outp;
- geniocb->context_un.ndlp = ndlp;
+ geniocb->context_un.ndlp = lpfc_nlp_get(ndlp);
/* Fill in payload, bp points to frame payload */
icmd->ulpCommand = CMD_GEN_REQUEST64_CR;
@@ -489,8 +489,10 @@ lpfc_ns_rsp(struct lpfc_vport *vport, st
*/
ndlp = lpfc_findnode_did(vport,
Did);
- if (ndlp && (ndlp->nlp_type &
- NLP_FCP_TARGET))
+ if (ndlp &&
+ NLP_CHK_NODE_ACT(ndlp)
+ && (ndlp->nlp_type &
+ NLP_FCP_TARGET))
lpfc_setup_disc_node
(vport, Did);
else if (lpfc_ns_cmd(vport,
@@ -1064,7 +1066,8 @@ lpfc_ns_cmd(struct lpfc_vport *vport, in
int rc = 0;
ndlp = lpfc_findnode_did(vport, NameServer_DID);
- if (ndlp == NULL || ndlp->nlp_state != NLP_STE_UNMAPPED_NODE) {
+ if (!ndlp || !NLP_CHK_NODE_ACT(ndlp)
+ || ndlp->nlp_state != NLP_STE_UNMAPPED_NODE) {
rc=1;
goto ns_cmd_exit;
}
@@ -1213,8 +1216,9 @@ lpfc_ns_cmd(struct lpfc_vport *vport, in
cmpl = lpfc_cmpl_ct_cmd_rff_id;
break;
}
- lpfc_nlp_get(ndlp);
-
+ /* The lpfc_ct_cmd/lpfc_get_req shall increment ndlp reference count
+ * to hold ndlp reference for the corresponding callback function.
+ */
if (!lpfc_ct_cmd(vport, mp, bmp, ndlp, cmpl, rsp_size, retry)) {
/* On success, The cmpl function will free the buffers */
lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_CT,
@@ -1222,9 +1226,13 @@ lpfc_ns_cmd(struct lpfc_vport *vport, in
cmdcode, ndlp->nlp_DID, 0);
return 0;
}
-
rc=6;
+
+ /* Decrement ndlp reference count to release ndlp reference held
+ * for the failed command's callback function.
+ */
lpfc_nlp_put(ndlp);
+
lpfc_mbuf_free(phba, bmp->virt, bmp->phys);
ns_cmd_free_bmp:
kfree(bmp);
@@ -1271,6 +1279,9 @@ lpfc_cmpl_ct_cmd_fdmi(struct lpfc_hba *p
}
ndlp = lpfc_findnode_did(vport, FDMI_DID);
+ if (!ndlp || !NLP_CHK_NODE_ACT(ndlp))
+ goto fail_out;
+
if (fdmi_rsp == be16_to_cpu(SLI_CT_RESPONSE_FS_RJT)) {
/* FDMI rsp failed */
lpfc_printf_vlog(vport, KERN_INFO, LOG_DISCOVERY,
@@ -1294,6 +1305,8 @@ lpfc_cmpl_ct_cmd_fdmi(struct lpfc_hba *p
lpfc_fdmi_cmd(vport, ndlp, SLI_MGMT_RHBA);
break;
}
+
+fail_out:
lpfc_ct_free_iocb(phba, cmdiocb);
return;
}
@@ -1650,12 +1663,18 @@ lpfc_fdmi_cmd(struct lpfc_vport *vport,
bpl->tus.w = le32_to_cpu(bpl->tus.w);
cmpl = lpfc_cmpl_ct_cmd_fdmi;
- lpfc_nlp_get(ndlp);
+ /* The lpfc_ct_cmd/lpfc_get_req shall increment ndlp reference count
+ * to hold ndlp reference for the corresponding callback function.
+ */
if (!lpfc_ct_cmd(vport, mp, bmp, ndlp, cmpl, FC_MAX_NS_RSP, 0))
return 0;
+ /* Decrement ndlp reference count to release ndlp reference held
+ * for the failed command's callback function.
+ */
lpfc_nlp_put(ndlp);
+
lpfc_mbuf_free(phba, bmp->virt, bmp->phys);
fdmi_cmd_free_bmp:
kfree(bmp);
@@ -1698,7 +1717,7 @@ lpfc_fdmi_timeout_handler(struct lpfc_vp
struct lpfc_nodelist *ndlp;
ndlp = lpfc_findnode_did(vport, FDMI_DID);
- if (ndlp) {
+ if (ndlp && NLP_CHK_NODE_ACT(ndlp)) {
if (init_utsname()->nodename[0] != '\0')
lpfc_fdmi_cmd(vport, ndlp, SLI_MGMT_DHBA);
else
diff -upNr a/drivers/scsi/lpfc/lpfc_disc.h b/drivers/scsi/lpfc/lpfc_disc.h
--- a/drivers/scsi/lpfc/lpfc_disc.h 2007-11-09 15:54:47.000000000 -0500
+++ b/drivers/scsi/lpfc/lpfc_disc.h 2008-02-08 18:10:08.000000000 -0500
@@ -1,7 +1,7 @@
/*******************************************************************
* 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 *
* *
@@ -73,6 +73,12 @@ struct lpfc_nodelist {
uint8_t nlp_fcp_info; /* class info, bits 0-3 */
#define NLP_FCP_2_DEVICE 0x10 /* FCP-2 device */
+ uint16_t nlp_usg_map; /* ndlp management usage bitmap */
+#define NLP_USG_NODE_ACT_BIT 0x1 /* Indicate ndlp is actively used */
+#define NLP_USG_IACT_REQ_BIT 0x2 /* Request to inactivate ndlp */
+#define NLP_USG_FREE_REQ_BIT 0x4 /* Request to invoke ndlp memory free */
+#define NLP_USG_FREE_ACK_BIT 0x8 /* Indicate ndlp memory free invoked */
+
struct timer_list nlp_delayfunc; /* Used for delayed ELS cmds */
struct fc_rport *rport; /* Corresponding FC transport
port structure */
@@ -105,6 +111,31 @@ struct lpfc_nodelist {
#define NLP_NODEV_REMOVE 0x8000000 /* Defer removal till discovery ends */
#define NLP_TARGET_REMOVE 0x10000000 /* Target remove in process */
+/* ndlp usage management macros */
+#define NLP_CHK_NODE_ACT(ndlp) (((ndlp)->nlp_usg_map \
+ & NLP_USG_NODE_ACT_BIT) \
+ && \
+ !((ndlp)->nlp_usg_map \
+ & NLP_USG_FREE_ACK_BIT))
+#define NLP_SET_NODE_ACT(ndlp) ((ndlp)->nlp_usg_map \
+ |= NLP_USG_NODE_ACT_BIT)
+#define NLP_INT_NODE_ACT(ndlp) ((ndlp)->nlp_usg_map \
+ = NLP_USG_NODE_ACT_BIT)
+#define NLP_CLR_NODE_ACT(ndlp) ((ndlp)->nlp_usg_map \
+ &= ~NLP_USG_NODE_ACT_BIT)
+#define NLP_CHK_IACT_REQ(ndlp) ((ndlp)->nlp_usg_map \
+ & NLP_USG_IACT_REQ_BIT)
+#define NLP_SET_IACT_REQ(ndlp) ((ndlp)->nlp_usg_map \
+ |= NLP_USG_IACT_REQ_BIT)
+#define NLP_CHK_FREE_REQ(ndlp) ((ndlp)->nlp_usg_map \
+ & NLP_USG_FREE_REQ_BIT)
+#define NLP_SET_FREE_REQ(ndlp) ((ndlp)->nlp_usg_map \
+ |= NLP_USG_FREE_REQ_BIT)
+#define NLP_CHK_FREE_ACK(ndlp) ((ndlp)->nlp_usg_map \
+ & NLP_USG_FREE_ACK_BIT)
+#define NLP_SET_FREE_ACK(ndlp) ((ndlp)->nlp_usg_map \
+ |= NLP_USG_FREE_ACK_BIT)
+
/* There are 4 different double linked lists nodelist entries can reside on.
* The Port Login (PLOGI) list and Address Discovery (ADISC) list are used
* when Link Up discovery or Registered State Change Notification (RSCN)
diff -upNr a/drivers/scsi/lpfc/lpfc_els.c b/drivers/scsi/lpfc/lpfc_els.c
--- a/drivers/scsi/lpfc/lpfc_els.c 2008-01-14 13:06:49.000000000 -0500
+++ b/drivers/scsi/lpfc/lpfc_els.c 2008-02-08 18:10:20.000000000 -0500
@@ -1,7 +1,7 @@
/*******************************************************************
* 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 *
@@ -113,6 +113,7 @@ lpfc_prep_els_iocb(struct lpfc_vport *vp
if (elsiocb == NULL)
return NULL;
+
icmd = &elsiocb->iocb;
/* fill in BDEs for command */
@@ -134,9 +135,8 @@ lpfc_prep_els_iocb(struct lpfc_vport *vp
if (!prsp || !prsp->virt)
goto els_iocb_free_prsp_exit;
INIT_LIST_HEAD(&prsp->list);
- } else {
+ } else
prsp = NULL;
- }
/* Allocate buffer for Buffer ptr list */
pbuflist = kmalloc(sizeof(struct lpfc_dmabuf), GFP_KERNEL);
@@ -246,7 +246,7 @@ lpfc_issue_fabric_reglogin(struct lpfc_v
sp = &phba->fc_fabparam;
ndlp = lpfc_findnode_did(vport, Fabric_DID);
- if (!ndlp) {
+ if (!ndlp || !NLP_CHK_NODE_ACT(ndlp)) {
err = 1;
goto fail;
}
@@ -282,6 +282,9 @@ lpfc_issue_fabric_reglogin(struct lpfc_v
mbox->mbox_cmpl = lpfc_mbx_cmpl_fabric_reg_login;
mbox->vport = vport;
+ /* increment the reference count on ndlp to hold reference
+ * for the callback routine.
+ */
mbox->context2 = lpfc_nlp_get(ndlp);
rc = lpfc_sli_issue_mbox(phba, mbox, MBX_NOWAIT);
@@ -293,6 +296,9 @@ lpfc_issue_fabric_reglogin(struct lpfc_v
return 0;
fail_issue_reg_login:
+ /* decrement the reference count on ndlp just incremented
+ * for the failed mbox command.
+ */
lpfc_nlp_put(ndlp);
mp = (struct lpfc_dmabuf *) mbox->context1;
lpfc_mbuf_free(phba, mp->virt, mp->phys);
@@ -381,6 +387,8 @@ lpfc_cmpl_els_flogi_fabric(struct lpfc_v
*/
list_for_each_entry_safe(np, next_np,
&vport->fc_nodes, nlp_listp) {
+ if (!NLP_CHK_NODE_ACT(ndlp))
+ continue;
if ((np->nlp_state != NLP_STE_NPR_NODE) ||
!(np->nlp_flag & NLP_NPR_ADISC))
continue;
@@ -456,6 +464,9 @@ lpfc_cmpl_els_flogi_nport(struct lpfc_vp
mempool_free(mbox, phba->mbox_mem_pool);
goto fail;
}
+ /* Decrement ndlp reference count indicating that ndlp can be
+ * safely released when other references to it are done.
+ */
lpfc_nlp_put(ndlp);
ndlp = lpfc_findnode_did(vport, PT2PT_RemoteID);
@@ -467,22 +478,29 @@ lpfc_cmpl_els_flogi_nport(struct lpfc_vp
ndlp = mempool_alloc(phba->nlp_mem_pool, GFP_KERNEL);
if (!ndlp)
goto fail;
-
lpfc_nlp_init(vport, ndlp, PT2PT_RemoteID);
+ } else if (!NLP_CHK_NODE_ACT(ndlp)) {
+ ndlp = lpfc_enable_node(vport, ndlp,
+ NLP_STE_UNUSED_NODE);
+ if(!ndlp)
+ goto fail;
}
memcpy(&ndlp->nlp_portname, &sp->portName,
sizeof(struct lpfc_name));
memcpy(&ndlp->nlp_nodename, &sp->nodeName,
sizeof(struct lpfc_name));
+ /* Set state will put ndlp onto node list if not already done */
lpfc_nlp_set_state(vport, ndlp, NLP_STE_NPR_NODE);
spin_lock_irq(shost->host_lock);
ndlp->nlp_flag |= NLP_NPR_2B_DISC;
spin_unlock_irq(shost->host_lock);
- } else {
- /* This side will wait for the PLOGI */
+ } else
+ /* This side will wait for the PLOGI, decrement ndlp reference
+ * count indicating that ndlp can be released when other
+ * references to it are done.
+ */
lpfc_nlp_put(ndlp);
- }
/* If we are pt2pt with another NPort, force NPIV off! */
phba->sli3_options &= ~LPFC_SLI3_NPIV_ENABLED;
@@ -728,16 +746,21 @@ lpfc_initial_flogi(struct lpfc_vport *vp
if (!ndlp)
return 0;
lpfc_nlp_init(vport, ndlp, Fabric_DID);
- } else {
- lpfc_dequeue_node(vport, ndlp);
+ /* Put ndlp onto node list */
+ lpfc_enqueue_node(vport, ndlp);
+ } else if (!NLP_CHK_NODE_ACT(ndlp)) {
+ /* re-setup ndlp without removing from node list */
+ ndlp = lpfc_enable_node(vport, ndlp, NLP_STE_UNUSED_NODE);
+ if (!ndlp)
+ return 0;
}
- if (lpfc_issue_els_flogi(vport, ndlp, 0)) {
+ if (lpfc_issue_els_flogi(vport, ndlp, 0))
/* This decrement of reference count to node shall kick off
* the release of the node.
*/
lpfc_nlp_put(ndlp);
- }
+
return 1;
}
@@ -755,9 +778,15 @@ lpfc_initial_fdisc(struct lpfc_vport *vp
if (!ndlp)
return 0;
lpfc_nlp_init(vport, ndlp, Fabric_DID);
- } else {
- lpfc_dequeue_node(vport, ndlp);
+ /* Put ndlp onto node list */
+ lpfc_enqueue_node(vport, ndlp);
+ } else if (!NLP_CHK_NODE_ACT(ndlp)) {
+ /* re-setup ndlp without removing from node list */
+ ndlp = lpfc_enable_node(vport, ndlp, NLP_STE_UNUSED_NODE);
+ if (!ndlp)
+ return 0;
}
+
if (lpfc_issue_els_fdisc(vport, ndlp, 0)) {
/* decrement node reference count to trigger the release of
* the node.
@@ -816,7 +845,7 @@ lpfc_plogi_confirm_nport(struct lpfc_hba
*/
new_ndlp = lpfc_findnode_wwpn(vport, &sp->portName);
- if (new_ndlp == ndlp)
+ if (new_ndlp == ndlp && NLP_CHK_NODE_ACT(new_ndlp))
return ndlp;
if (!new_ndlp) {
@@ -827,8 +856,12 @@ lpfc_plogi_confirm_nport(struct lpfc_hba
new_ndlp = mempool_alloc(phba->nlp_mem_pool, GFP_ATOMIC);
if (!new_ndlp)
return ndlp;
-
lpfc_nlp_init(vport, new_ndlp, ndlp->nlp_DID);
+ } else if (!NLP_CHK_NODE_ACT(new_ndlp)) {
+ new_ndlp = lpfc_enable_node(vport, new_ndlp,
+ NLP_STE_UNUSED_NODE);
+ if (!new_ndlp)
+ return ndlp;
}
lpfc_unreg_rpi(vport, new_ndlp);
@@ -839,6 +872,7 @@ lpfc_plogi_confirm_nport(struct lpfc_hba
new_ndlp->nlp_flag |= NLP_NPR_2B_DISC;
ndlp->nlp_flag &= ~NLP_NPR_2B_DISC;
+ /* Set state will put new_ndlp on to node list if not already done */
lpfc_nlp_set_state(vport, new_ndlp, ndlp->nlp_state);
/* Move this back to NPR state */
@@ -912,7 +946,7 @@ lpfc_cmpl_els_plogi(struct lpfc_hba *phb
irsp->un.elsreq64.remoteID);
ndlp = lpfc_findnode_did(vport, irsp->un.elsreq64.remoteID);
- if (!ndlp) {
+ if (!ndlp || !NLP_CHK_NODE_ACT(ndlp)) {
lpfc_printf_vlog(vport, KERN_ERR, LOG_ELS,
"0136 PLOGI completes to NPort x%x "
"with no ndlp. Data: x%x x%x x%x\n",
@@ -962,12 +996,11 @@ lpfc_cmpl_els_plogi(struct lpfc_hba *phb
}
/* PLOGI failed */
/* Do not call DSM for lpfc_els_abort'ed ELS cmds */
- if (lpfc_error_lost_link(irsp)) {
+ if (lpfc_error_lost_link(irsp))
rc = NLP_STE_FREED_NODE;
- } else {
+ else
rc = lpfc_disc_state_machine(vport, ndlp, cmdiocb,
NLP_EVT_CMPL_PLOGI);
- }
} else {
/* Good status, call state machine */
prsp = list_entry(((struct lpfc_dmabuf *)
@@ -1015,8 +1048,10 @@ lpfc_issue_els_plogi(struct lpfc_vport *
pring = &psli->ring[LPFC_ELS_RING]; /* ELS ring */
ndlp = lpfc_findnode_did(vport, did);
- /* If ndlp if not NULL, we will bump the reference count on it */
+ if (ndlp && !NLP_CHK_NODE_ACT(ndlp))
+ ndlp = NULL;
+ /* If ndlp is not NULL, we will bump the reference count on it */
cmdsize = (sizeof(uint32_t) + sizeof(struct serv_parm));
elsiocb = lpfc_prep_els_iocb(vport, 1, cmdsize, retry, ndlp, did,
ELS_CMD_PLOGI);
@@ -1097,18 +1132,15 @@ lpfc_cmpl_els_prli(struct lpfc_hba *phba
}
/* PRLI failed */
/* Do not call DSM for lpfc_els_abort'ed ELS cmds */
- if (lpfc_error_lost_link(irsp)) {
+ if (lpfc_error_lost_link(irsp))
goto out;
- } else {
+ else
lpfc_disc_state_machine(vport, ndlp, cmdiocb,
NLP_EVT_CMPL_PRLI);
- }
- } else {
+ } else
/* Good status, call state machine */
lpfc_disc_state_machine(vport, ndlp, cmdiocb,
NLP_EVT_CMPL_PRLI);
- }
-
out:
lpfc_els_free_iocb(phba, cmdiocb);
return;
@@ -1275,15 +1307,13 @@ lpfc_cmpl_els_adisc(struct lpfc_hba *phb
}
/* ADISC failed */
/* Do not call DSM for lpfc_els_abort'ed ELS cmds */
- if (!lpfc_error_lost_link(irsp)) {
+ if (!lpfc_error_lost_link(irsp))
lpfc_disc_state_machine(vport, ndlp, cmdiocb,
NLP_EVT_CMPL_ADISC);
- }
- } else {
+ } else
/* Good status, call state machine */
lpfc_disc_state_machine(vport, ndlp, cmdiocb,
NLP_EVT_CMPL_ADISC);
- }
if (disc && vport->num_disc_nodes) {
/* Check to see if there are more ADISCs to be sent */
@@ -1443,14 +1473,12 @@ lpfc_cmpl_els_logo(struct lpfc_hba *phba
else
lpfc_disc_state_machine(vport, ndlp, cmdiocb,
NLP_EVT_CMPL_LOGO);
- } else {
+ } else
/* Good status, call state machine.
* This will unregister the rpi if needed.
*/
lpfc_disc_state_machine(vport, ndlp, cmdiocb,
NLP_EVT_CMPL_LOGO);
- }
-
out:
lpfc_els_free_iocb(phba, cmdiocb);
return;
@@ -1556,11 +1584,19 @@ lpfc_issue_els_scr(struct lpfc_vport *vp
psli = &phba->sli;
pring = &psli->ring[LPFC_ELS_RING]; /* ELS ring */
cmdsize = (sizeof(uint32_t) + sizeof(SCR));
- ndlp = mempool_alloc(phba->nlp_mem_pool, GFP_KERNEL);
- if (!ndlp)
- return 1;
- lpfc_nlp_init(vport, ndlp, nportid);
+ ndlp = lpfc_findnode_did(vport, nportid);
+ if (!ndlp) {
+ ndlp = mempool_alloc(phba->nlp_mem_pool, GFP_KERNEL);
+ if (!ndlp)
+ return 1;
+ lpfc_nlp_init(vport, ndlp, nportid);
+ lpfc_enqueue_node(vport, ndlp);
+ } else if (!NLP_CHK_NODE_ACT(ndlp)) {
+ ndlp = lpfc_enable_node(vport, ndlp, NLP_STE_UNUSED_NODE);
+ if (!ndlp)
+ return 1;
+ }
elsiocb = lpfc_prep_els_iocb(vport, 1, cmdsize, retry, ndlp,
ndlp->nlp_DID, ELS_CMD_SCR);
@@ -1623,11 +1659,19 @@ lpfc_issue_els_farpr(struct lpfc_vport *
psli = &phba->sli;
pring = &psli->ring[LPFC_ELS_RING]; /* ELS ring */
cmdsize = (sizeof(uint32_t) + sizeof(FARP));
- ndlp = mempool_alloc(phba->nlp_mem_pool, GFP_KERNEL);
- if (!ndlp)
- return 1;
- lpfc_nlp_init(vport, ndlp, nportid);
+ ndlp = lpfc_findnode_did(vport, nportid);
+ if (!ndlp) {
+ ndlp = mempool_alloc(phba->nlp_mem_pool, GFP_KERNEL);
+ if (!ndlp)
+ return 1;
+ lpfc_nlp_init(vport, ndlp, nportid);
+ lpfc_enqueue_node(vport, ndlp);
+ } else if (!NLP_CHK_NODE_ACT(ndlp)) {
+ ndlp = lpfc_enable_node(vport, ndlp, NLP_STE_UNUSED_NODE);
+ if (!ndlp)
+ return 1;
+ }
elsiocb = lpfc_prep_els_iocb(vport, 1, cmdsize, retry, ndlp,
ndlp->nlp_DID, ELS_CMD_RNID);
@@ -1657,7 +1701,7 @@ lpfc_issue_els_farpr(struct lpfc_vport *
memcpy(&fp->RportName, &vport->fc_portname, sizeof(struct lpfc_name));
memcpy(&fp->RnodeName, &vport->fc_nodename, sizeof(struct lpfc_name));
ondlp = lpfc_findnode_did(vport, nportid);
- if (ondlp) {
+ if (ondlp && NLP_CHK_NODE_ACT(ondlp)) {
memcpy(&fp->OportName, &ondlp->nlp_portname,
sizeof(struct lpfc_name));
memcpy(&fp->OnodeName, &ondlp->nlp_nodename,
@@ -1690,6 +1734,7 @@ void
lpfc_cancel_retry_delay_tmo(struct lpfc_vport *vport, struct lpfc_nodelist *nlp)
{
struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
+ struct lpfc_work_evt *evtp;
spin_lock_irq(shost->host_lock);
nlp->nlp_flag &= ~NLP_DELAY_TMO;
@@ -1697,8 +1742,12 @@ lpfc_cancel_retry_delay_tmo(struct lpfc_
del_timer_sync(&nlp->nlp_delayfunc);
nlp->nlp_last_elscmd = 0;
- if (!list_empty(&nlp->els_retry_evt.evt_listp))
+ if (!list_empty(&nlp->els_retry_evt.evt_listp)) {
list_del_init(&nlp->els_retry_evt.evt_listp);
+ /* Decrement nlp reference count held for the delayed retry */
+ evtp = &nlp->els_retry_evt;
+ lpfc_nlp_put((struct lpfc_nodelist *)evtp->evt_arg1);
+ }
if (nlp->nlp_flag & NLP_NPR_2B_DISC) {
spin_lock_irq(shost->host_lock);
@@ -1842,13 +1891,14 @@ lpfc_els_retry(struct lpfc_hba *phba, st
cmd = *elscmd++;
}
- if (ndlp)
+ if (ndlp && NLP_CHK_NODE_ACT(ndlp))
did = ndlp->nlp_DID;
else {
/* We should only hit this case for retrying PLOGI */
did = irsp->un.elsreq64.remoteID;
ndlp = lpfc_findnode_did(vport, did);
- if (!ndlp && (cmd != ELS_CMD_PLOGI))
+ if ((!ndlp || !NLP_CHK_NODE_ACT(ndlp))
+ && (cmd != ELS_CMD_PLOGI))
return 1;
}
@@ -2322,6 +2372,9 @@ lpfc_cmpl_els_rsp(struct lpfc_hba *phba,
if ((rspiocb->iocb.ulpStatus == 0)
&& (ndlp->nlp_flag & NLP_ACC_REGLOGIN)) {
lpfc_unreg_rpi(vport, ndlp);
+ /* Increment reference count to ndlp to hold the
+ * reference to ndlp for the callback function.
+ */
mbox->context2 = lpfc_nlp_get(ndlp);
mbox->vport = vport;
if (ndlp->nlp_flag & NLP_RM_DFLT_RPI) {
@@ -2335,9 +2388,13 @@ lpfc_cmpl_els_rsp(struct lpfc_hba *phba,
NLP_STE_REG_LOGIN_ISSUE);
}
if (lpfc_sli_issue_mbox(phba, mbox, MBX_NOWAIT)
- != MBX_NOT_FINISHED) {
+ != MBX_NOT_FINISHED)
goto out;
- }
+ else
+ /* Decrement the ndlp reference count we
+ * set for this failed mailbox command.
+ */
+ lpfc_nlp_put(ndlp);
/* ELS rsp: Cannot issue reg_login for <NPortid> */
lpfc_printf_vlog(vport, KERN_ERR, LOG_ELS,
@@ -2796,6 +2853,8 @@ lpfc_els_disc_adisc(struct lpfc_vport *v
/* go thru NPR nodes and issue any remaining ELS ADISCs */
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 &&
(ndlp->nlp_flag & NLP_NPR_2B_DISC) != 0 &&
(ndlp->nlp_flag & NLP_NPR_ADISC) != 0) {
@@ -2833,6 +2892,8 @@ lpfc_els_disc_plogi(struct lpfc_vport *v
/* go thru NPR nodes and issue any remaining ELS PLOGIs */
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 &&
(ndlp->nlp_flag & NLP_NPR_2B_DISC) != 0 &&
(ndlp->nlp_flag & NLP_DELAY_TMO) == 0 &&
@@ -2943,7 +3004,8 @@ lpfc_rscn_recovery_check(struct lpfc_vpo
*/
list_for_each_entry(ndlp, &vport->fc_nodes, nlp_listp) {
- if (ndlp->nlp_state == NLP_STE_UNUSED_NODE ||
+ if (!NLP_CHK_NODE_ACT(ndlp) ||
+ ndlp->nlp_state == NLP_STE_UNUSED_NODE ||
lpfc_rscn_payload_check(vport, ndlp->nlp_DID) == 0)
continue;
@@ -3145,7 +3207,8 @@ lpfc_els_handle_rscn(struct lpfc_vport *
vport->num_disc_nodes = 0;
ndlp = lpfc_findnode_did(vport, NameServer_DID);
- if (ndlp && ndlp->nlp_state == NLP_STE_UNMAPPED_NODE) {
+ if (ndlp && NLP_CHK_NODE_ACT(ndlp)
+ && ndlp->nlp_state == NLP_STE_UNMAPPED_NODE) {
/* Good ndlp, issue CT Request to NameServer */
if (lpfc_ns_cmd(vport, SLI_CTNS_GID_FT, 0, 0) == 0)
/* Wait for NameServer query cmpl before we can
@@ -3155,25 +3218,35 @@ lpfc_els_handle_rscn(struct lpfc_vport *
/* If login to NameServer does not exist, issue one */
/* Good status, issue PLOGI to NameServer */
ndlp = lpfc_findnode_did(vport, NameServer_DID);
- if (ndlp)
+ if (ndlp && NLP_CHK_NODE_ACT(ndlp))
/* Wait for NameServer login cmpl before we can
continue */
return 1;
- ndlp = mempool_alloc(phba->nlp_mem_pool, GFP_KERNEL);
- if (!ndlp) {
- lpfc_els_flush_rscn(vport);
- return 0;
+ if (ndlp) {
+ ndlp = lpfc_enable_node(vport, ndlp,
+ NLP_STE_PLOGI_ISSUE);
+ if (!ndlp) {
+ lpfc_els_flush_rscn(vport);
+ return 0;
+ }
+ ndlp->nlp_prev_state = NLP_STE_UNUSED_NODE;
} else {
+ ndlp = mempool_alloc(phba->nlp_mem_pool, GFP_KERNEL);
+ if (!ndlp) {
+ lpfc_els_flush_rscn(vport);
+ return 0;
+ }
lpfc_nlp_init(vport, ndlp, NameServer_DID);
- ndlp->nlp_type |= NLP_FABRIC;
ndlp->nlp_prev_state = ndlp->nlp_state;
lpfc_nlp_set_state(vport, ndlp, NLP_STE_PLOGI_ISSUE);
- lpfc_issue_els_plogi(vport, NameServer_DID, 0);
- /* Wait for NameServer login cmpl before we can
- continue */
- return 1;
}
+ ndlp->nlp_type |= NLP_FABRIC;
+ lpfc_issue_els_plogi(vport, NameServer_DID, 0);
+ /* Wait for NameServer login cmpl before we can
+ * continue
+ */
+ return 1;
}
lpfc_els_flush_rscn(vport);
@@ -3672,6 +3745,8 @@ lpfc_els_rcv_fan(struct lpfc_vport *vpor
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) {
@@ -3697,6 +3772,8 @@ lpfc_els_rcv_fan(struct lpfc_vport *vpor
*/
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;
@@ -3936,7 +4013,7 @@ lpfc_els_unsol_buffer(struct lpfc_hba *p
uint32_t cmd, did, newnode, rjt_err = 0;
IOCB_t *icmd = &elsiocb->iocb;
- if (vport == NULL || elsiocb->context2 == NULL)
+ if (!vport || !(elsiocb->context2))
goto dropit;
newnode = 0;
@@ -3971,14 +4048,20 @@ lpfc_els_unsol_buffer(struct lpfc_hba *p
lpfc_nlp_init(vport, ndlp, did);
lpfc_nlp_set_state(vport, ndlp, NLP_STE_NPR_NODE);
newnode = 1;
- if ((did & Fabric_DID_MASK) == Fabric_DID_MASK) {
+ if ((did & Fabric_DID_MASK) == Fabric_DID_MASK)
ndlp->nlp_type |= NLP_FABRIC;
+ } else {
+ if (!NLP_CHK_NODE_ACT(ndlp)) {
+ ndlp = lpfc_enable_node(vport, ndlp,
+ NLP_STE_UNUSED_NODE);
+ if (!ndlp)
+ goto dropit;
}
- }
- else {
if (ndlp->nlp_state == NLP_STE_UNUSED_NODE) {
/* This is simular to the new node path */
- lpfc_nlp_get(ndlp);
+ ndlp = lpfc_nlp_get(ndlp);
+ if (!ndlp)
+ goto dropit;
lpfc_nlp_set_state(vport, ndlp, NLP_STE_NPR_NODE);
newnode = 1;
}
@@ -3987,6 +4070,7 @@ lpfc_els_unsol_buffer(struct lpfc_hba *p
phba->fc_stat.elsRcvFrame++;
if (elsiocb->context1)
lpfc_nlp_put(elsiocb->context1);
+
elsiocb->context1 = lpfc_nlp_get(ndlp);
elsiocb->vport = vport;
@@ -4314,6 +4398,18 @@ lpfc_do_scr_ns_plogi(struct lpfc_hba *ph
}
lpfc_nlp_init(vport, ndlp, NameServer_DID);
ndlp->nlp_type |= NLP_FABRIC;
+ } else if (!NLP_CHK_NODE_ACT(ndlp)) {
+ ndlp = lpfc_enable_node(vport, ndlp, NLP_STE_UNUSED_NODE);
+ if (!ndlp) {
+ if (phba->fc_topology == TOPOLOGY_LOOP) {
+ lpfc_disc_start(vport);
+ return;
+ }
+ lpfc_vport_set_state(vport, FC_VPORT_FAILED);
+ lpfc_printf_vlog(vport, KERN_ERR, LOG_ELS,
+ "0348 NameServer login: node freed\n");
+ return;
+ }
}
lpfc_nlp_set_state(vport, ndlp, NLP_STE_PLOGI_ISSUE);
@@ -4471,7 +4567,6 @@ lpfc_cmpl_els_fdisc(struct lpfc_hba *phb
irsp->ulpStatus, irsp->un.ulpWord[4]);
if (vport->fc_vport->vport_state == FC_VPORT_INITIALIZING)
lpfc_vport_set_state(vport, FC_VPORT_FAILED);
-
lpfc_nlp_put(ndlp);
/* giving up on FDISC. Cancel discovery timer */
lpfc_can_disctmo(vport);
@@ -4492,8 +4587,9 @@ lpfc_cmpl_els_fdisc(struct lpfc_hba *phb
*/
list_for_each_entry_safe(np, next_np,
&vport->fc_nodes, nlp_listp) {
- if (np->nlp_state != NLP_STE_NPR_NODE
- || !(np->nlp_flag & NLP_NPR_ADISC))
+ if (!NLP_CHK_NODE_ACT(ndlp) ||
+ (np->nlp_state != NLP_STE_NPR_NODE) ||
+ !(np->nlp_flag & NLP_NPR_ADISC))
continue;
spin_lock_irq(shost->host_lock);
np->nlp_flag &= ~NLP_NPR_ADISC;
@@ -4599,6 +4695,8 @@ lpfc_cmpl_els_npiv_logo(struct lpfc_hba
{
struct lpfc_vport *vport = cmdiocb->vport;
IOCB_t *irsp;
+ struct lpfc_nodelist *ndlp;
+ ndlp = (struct lpfc_nodelist *)cmdiocb->context1;
irsp = &rspiocb->iocb;
lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_CMD,
@@ -4607,6 +4705,9 @@ lpfc_cmpl_els_npiv_logo(struct lpfc_hba
lpfc_els_free_iocb(phba, cmdiocb);
vport->unreg_vpi_cmpl = VPORT_ERROR;
+
+ /* Trigger the release of the ndlp after logo */
+ lpfc_nlp_put(ndlp);
}
int
diff -upNr a/drivers/scsi/lpfc/lpfc.h b/drivers/scsi/lpfc/lpfc.h
--- a/drivers/scsi/lpfc/lpfc.h 2008-02-06 11:02:08.000000000 -0500
+++ b/drivers/scsi/lpfc/lpfc.h 2008-02-08 18:10:08.000000000 -0500
@@ -595,6 +595,8 @@ struct lpfc_hba {
unsigned long last_completion_time;
struct timer_list hb_tmofunc;
uint8_t hb_outstanding;
+ /* ndlp reference management */
+ spinlock_t ndlp_lock;
/*
* Following bit will be set for all buffer tags which are not
* associated with any HBQ.
diff -upNr a/drivers/scsi/lpfc/lpfc_hbadisc.c b/drivers/scsi/lpfc/lpfc_hbadisc.c
--- a/drivers/scsi/lpfc/lpfc_hbadisc.c 2008-01-14 13:06:49.000000000 -0500
+++ b/drivers/scsi/lpfc/lpfc_hbadisc.c 2008-02-08 18:10:08.000000000 -0500
@@ -1,7 +1,7 @@
/*******************************************************************
* 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 *
@@ -272,9 +272,8 @@ lpfc_dev_loss_tmo_handler(struct lpfc_no
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);
- }
}
@@ -566,9 +565,10 @@ lpfc_cleanup_rpis(struct lpfc_vport *vpo
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) ||
((vport->port_type == LPFC_NPIV_PORT) &&
(ndlp->nlp_DID == NameServer_DID)))
@@ -684,20 +684,21 @@ lpfc_linkup_cleanup_nodes(struct lpfc_vp
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);
}
}
@@ -1305,7 +1306,6 @@ lpfc_mbx_cmpl_fabric_reg_login(struct lp
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 */
@@ -1313,6 +1313,10 @@ lpfc_mbx_cmpl_fabric_reg_login(struct lp
/* 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;
}
@@ -1320,6 +1324,10 @@ lpfc_mbx_cmpl_fabric_reg_login(struct lp
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;
}
@@ -1327,8 +1335,6 @@ lpfc_mbx_cmpl_fabric_reg_login(struct lp
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)
@@ -1356,6 +1362,11 @@ lpfc_mbx_cmpl_fabric_reg_login(struct lp
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;
}
@@ -1463,9 +1474,8 @@ lpfc_register_remote_port(struct lpfc_vp
* 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",
@@ -1660,6 +1670,18 @@ lpfc_nlp_set_state(struct lpfc_vport *vp
}
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)
{
struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
@@ -1672,7 +1694,80 @@ lpfc_dequeue_node(struct lpfc_vport *vpo
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);
+}
+
+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
@@ -1972,7 +2067,21 @@ lpfc_cleanup_node(struct lpfc_vport *vpo
"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)) {
@@ -1994,12 +2103,16 @@ lpfc_cleanup_node(struct lpfc_vport *vpo
}
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);
@@ -2057,7 +2170,6 @@ lpfc_nlp_remove(struct lpfc_vport *vport
}
}
}
-
lpfc_cleanup_node(vport, ndlp);
/*
@@ -2182,7 +2294,16 @@ lpfc_setup_disc_node(struct lpfc_vport *
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
@@ -2485,6 +2606,8 @@ lpfc_disc_flush_list(struct lpfc_vport *
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);
@@ -2572,6 +2695,8 @@ lpfc_disc_timeout_handler(struct lpfc_vp
/* 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) {
@@ -2618,7 +2743,7 @@ lpfc_disc_timeout_handler(struct lpfc_vp
"NameServer login\n");
/* Next look for NameServer ndlp */
ndlp = lpfc_findnode_did(vport, NameServer_DID);
- if (ndlp)
+ if (ndlp && NLP_CHK_NODE_ACT(ndlp))
lpfc_els_abort(phba, ndlp);
/* ReStart discovery */
@@ -2897,6 +3022,7 @@ lpfc_nlp_init(struct lpfc_vport *vport,
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",
@@ -2911,6 +3037,8 @@ lpfc_nlp_init(struct lpfc_vport *vport,
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);
@@ -2918,8 +3046,24 @@ lpfc_nlp_release(struct kref *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
@@ -2929,37 +3073,108 @@ lpfc_nlp_release(struct kref *kref)
struct lpfc_nodelist *
lpfc_nlp_get(struct lpfc_nodelist *ndlp)
{
+ 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));
- kref_get(&ndlp->kref);
+ /* 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.
+ * 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)
{
- if (ndlp) {
- 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));
+ 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;
}
- return ndlp ? kref_put(&ndlp->kref, lpfc_nlp_release) : 0;
+ /* 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
- * is not being used by anyone and has been freed. A return value of
- * 0 indicates it is being used by another discovery thread and the
- * refcount is left unchanged.
+ * 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)
@@ -2968,11 +3183,8 @@ lpfc_nlp_not_used(struct lpfc_nodelist *
"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) {
- lpfc_nlp_put(ndlp);
- return 1;
- }
+ if (atomic_read(&ndlp->kref.refcount) == 1)
+ if (lpfc_nlp_put(ndlp))
+ return 1;
return 0;
}
-
diff -upNr a/drivers/scsi/lpfc/lpfc_init.c b/drivers/scsi/lpfc/lpfc_init.c
--- a/drivers/scsi/lpfc/lpfc_init.c 2008-02-06 11:02:08.000000000 -0500
+++ b/drivers/scsi/lpfc/lpfc_init.c 2008-02-08 18:10:20.000000000 -0500
@@ -1,7 +1,7 @@
/*******************************************************************
* 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 *
@@ -1422,9 +1422,32 @@ lpfc_cleanup(struct lpfc_vport *vport)
lpfc_port_link_failure(vport);
list_for_each_entry_safe(ndlp, next_ndlp, &vport->fc_nodes, nlp_listp) {
+ if (!NLP_CHK_NODE_ACT(ndlp)) {
+ ndlp = lpfc_enable_node(vport, ndlp,
+ NLP_STE_UNUSED_NODE);
+ if (!ndlp)
+ continue;
+ spin_lock_irq(&phba->ndlp_lock);
+ NLP_SET_FREE_REQ(ndlp);
+ spin_unlock_irq(&phba->ndlp_lock);
+ /* Trigger the release of the ndlp memory */
+ lpfc_nlp_put(ndlp);
+ continue;
+ }
+ spin_lock_irq(&phba->ndlp_lock);
+ if (NLP_CHK_FREE_REQ(ndlp)) {
+ /* The ndlp should not be in memory free mode already */
+ spin_unlock_irq(&phba->ndlp_lock);
+ continue;
+ } else
+ /* Indicate request for freeing ndlp memory */
+ NLP_SET_FREE_REQ(ndlp);
+ spin_unlock_irq(&phba->ndlp_lock);
+
if (ndlp->nlp_type & NLP_FABRIC)
lpfc_disc_state_machine(vport, ndlp, NULL,
NLP_EVT_DEVICE_RECOVERY);
+
lpfc_disc_state_machine(vport, ndlp, NULL,
NLP_EVT_DEVICE_RM);
}
@@ -1438,6 +1461,17 @@ lpfc_cleanup(struct lpfc_vport *vport)
if (i++ > 3000) {
lpfc_printf_vlog(vport, KERN_ERR, LOG_DISCOVERY,
"0233 Nodelist not empty\n");
+ list_for_each_entry_safe(ndlp, next_ndlp,
+ &vport->fc_nodes, nlp_listp) {
+ lpfc_printf_vlog(ndlp->vport, KERN_ERR,
+ LOG_NODE,
+ "0282: did:x%x ndlp:x%p "
+ "usgmap:x%x refcnt:%d\n",
+ ndlp->nlp_DID, (void *)ndlp,
+ ndlp->nlp_usg_map,
+ atomic_read(
+ &ndlp->kref.refcount));
+ }
break;
}
@@ -1586,6 +1620,8 @@ lpfc_offline_prep(struct lpfc_hba * phba
list_for_each_entry_safe(ndlp, next_ndlp,
&vports[i]->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) {
@@ -1905,6 +1941,9 @@ lpfc_pci_probe_one(struct pci_dev *pdev,
spin_lock_init(&phba->hbalock);
+ /* Initialize ndlp management spinlock */
+ spin_lock_init(&phba->ndlp_lock);
+
phba->pcidev = pdev;
/* Assign an unused board number */
diff -upNr a/drivers/scsi/lpfc/lpfc_nportdisc.c b/drivers/scsi/lpfc/lpfc_nportdisc.c
--- a/drivers/scsi/lpfc/lpfc_nportdisc.c 2008-01-14 13:06:49.000000000 -0500
+++ b/drivers/scsi/lpfc/lpfc_nportdisc.c 2008-02-08 18:10:20.000000000 -0500
@@ -1,7 +1,7 @@
/*******************************************************************
* 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 *
@@ -249,6 +249,7 @@ lpfc_rcv_plogi(struct lpfc_vport *vport,
struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
struct lpfc_hba *phba = vport->phba;
struct lpfc_dmabuf *pcmd;
+ struct lpfc_work_evt *evtp;
uint32_t *lp;
IOCB_t *icmd;
struct serv_parm *sp;
@@ -435,8 +436,14 @@ lpfc_rcv_plogi(struct lpfc_vport *vport,
del_timer_sync(&ndlp->nlp_delayfunc);
ndlp->nlp_last_elscmd = 0;
- if (!list_empty(&ndlp->els_retry_evt.evt_listp))
+ if (!list_empty(&ndlp->els_retry_evt.evt_listp)) {
list_del_init(&ndlp->els_retry_evt.evt_listp);
+ /* Decrement ndlp reference count held for the
+ * delayed retry
+ */
+ evtp = &ndlp->els_retry_evt;
+ lpfc_nlp_put((struct lpfc_nodelist *)evtp->evt_arg1);
+ }
if (ndlp->nlp_flag & NLP_NPR_2B_DISC) {
spin_lock_irq(shost->host_lock);
@@ -656,7 +663,7 @@ lpfc_disc_illegal(struct lpfc_vport *vpo
void *arg, uint32_t evt)
{
lpfc_printf_vlog(vport, KERN_ERR, LOG_DISCOVERY,
- "0253 Illegal State Transition: node x%x "
+ "0271 Illegal State Transition: node x%x "
"event x%x, state x%x Data: x%x x%x\n",
ndlp->nlp_DID, evt, ndlp->nlp_state, ndlp->nlp_rpi,
ndlp->nlp_flag);
@@ -674,7 +681,7 @@ lpfc_cmpl_plogi_illegal(struct lpfc_vpor
*/
if (!(ndlp->nlp_flag & NLP_RCV_PLOGI)) {
lpfc_printf_vlog(vport, KERN_ERR, LOG_DISCOVERY,
- "0253 Illegal State Transition: node x%x "
+ "0272 Illegal State Transition: node x%x "
"event x%x, state x%x Data: x%x x%x\n",
ndlp->nlp_DID, evt, ndlp->nlp_state, ndlp->nlp_rpi,
ndlp->nlp_flag);
@@ -2144,8 +2151,11 @@ lpfc_disc_state_machine(struct lpfc_vpor
uint32_t cur_state, rc;
uint32_t(*func) (struct lpfc_vport *, struct lpfc_nodelist *, void *,
uint32_t);
+ uint32_t got_ndlp = 0;
+
+ if (lpfc_nlp_get(ndlp))
+ got_ndlp = 1;
- lpfc_nlp_get(ndlp);
cur_state = ndlp->nlp_state;
/* DSM in event <evt> on NPort <nlp_DID> in state <cur_state> */
@@ -2162,15 +2172,24 @@ lpfc_disc_state_machine(struct lpfc_vpor
rc = (func) (vport, ndlp, arg, evt);
/* DSM out state <rc> on NPort <nlp_DID> */
- lpfc_printf_vlog(vport, KERN_INFO, LOG_DISCOVERY,
+ if (got_ndlp) {
+ lpfc_printf_vlog(vport, KERN_INFO, LOG_DISCOVERY,
"0212 DSM out state %d on NPort x%x Data: x%x\n",
rc, ndlp->nlp_DID, ndlp->nlp_flag);
- lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_DSM,
- "DSM out: ste:%d did:x%x flg:x%x",
- rc, ndlp->nlp_DID, ndlp->nlp_flag);
+ lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_DSM,
+ "DSM out: ste:%d did:x%x flg:x%x",
+ rc, ndlp->nlp_DID, ndlp->nlp_flag);
+ /* Decrement the ndlp reference count held for this function */
+ lpfc_nlp_put(ndlp);
+ } else {
+ lpfc_printf_vlog(vport, KERN_INFO, LOG_DISCOVERY,
+ "0212 DSM out state %d on NPort free\n", rc);
- lpfc_nlp_put(ndlp);
+ lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_DSM,
+ "DSM out: ste:%d did:x%x flg:x%x",
+ rc, 0, 0);
+ }
return rc;
}
diff -upNr a/drivers/scsi/lpfc/lpfc_scsi.c b/drivers/scsi/lpfc/lpfc_scsi.c
--- a/drivers/scsi/lpfc/lpfc_scsi.c 2008-02-06 11:02:08.000000000 -0500
+++ b/drivers/scsi/lpfc/lpfc_scsi.c 2008-02-08 18:10:08.000000000 -0500
@@ -1,7 +1,7 @@
/*******************************************************************
* 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 *
@@ -1283,6 +1283,8 @@ lpfc_bus_reset_handler(struct scsi_cmnd
match = 0;
spin_lock_irq(shost->host_lock);
list_for_each_entry(ndlp, &vport->fc_nodes, nlp_listp) {
+ if (!NLP_CHK_NODE_ACT(ndlp))
+ continue;
if (ndlp->nlp_state == NLP_STE_MAPPED_NODE &&
i == ndlp->nlp_sid &&
ndlp->rport) {
diff -upNr a/drivers/scsi/lpfc/lpfc_vport.c b/drivers/scsi/lpfc/lpfc_vport.c
--- a/drivers/scsi/lpfc/lpfc_vport.c 2008-01-14 13:06:49.000000000 -0500
+++ b/drivers/scsi/lpfc/lpfc_vport.c 2008-02-08 18:10:08.000000000 -0500
@@ -1,7 +1,7 @@
/*******************************************************************
* This file is part of the Emulex Linux Device Driver for *
* Fibre Channel Host Bus Adapters. *
- * Copyright (C) 2004-2006 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 *
@@ -327,7 +327,8 @@ lpfc_vport_create(struct fc_vport *fc_vp
* up and ready to FDISC.
*/
ndlp = lpfc_findnode_did(phba->pport, Fabric_DID);
- if (ndlp && ndlp->nlp_state == NLP_STE_UNMAPPED_NODE) {
+ if (ndlp && NLP_CHK_NODE_ACT(ndlp) &&
+ ndlp->nlp_state == NLP_STE_UNMAPPED_NODE) {
if (phba->link_flag & LS_NPIV_FAB_SUPPORTED) {
lpfc_set_disctmo(vport);
lpfc_initial_fdisc(vport);
@@ -358,7 +359,8 @@ disable_vport(struct fc_vport *fc_vport)
long timeout;
ndlp = lpfc_findnode_did(vport, Fabric_DID);
- if (ndlp && phba->link_state >= LPFC_LINK_UP) {
+ if (ndlp && NLP_CHK_NODE_ACT(ndlp)
+ && phba->link_state >= LPFC_LINK_UP) {
vport->unreg_vpi_cmpl = VPORT_INVAL;
timeout = msecs_to_jiffies(phba->fc_ratov * 2000);
if (!lpfc_issue_els_npiv_logo(vport, ndlp))
@@ -372,6 +374,8 @@ disable_vport(struct fc_vport *fc_vport)
* calling lpfc_cleanup_rpis(vport, 1)
*/
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;
lpfc_disc_state_machine(vport, ndlp, NULL,
@@ -414,7 +418,8 @@ enable_vport(struct fc_vport *fc_vport)
* up and ready to FDISC.
*/
ndlp = lpfc_findnode_did(phba->pport, Fabric_DID);
- if (ndlp && ndlp->nlp_state == NLP_STE_UNMAPPED_NODE) {
+ if (ndlp && NLP_CHK_NODE_ACT(ndlp)
+ && ndlp->nlp_state == NLP_STE_UNMAPPED_NODE) {
if (phba->link_flag & LS_NPIV_FAB_SUPPORTED) {
lpfc_set_disctmo(vport);
lpfc_initial_fdisc(vport);
@@ -498,7 +503,41 @@ lpfc_vport_delete(struct fc_vport *fc_vp
scsi_remove_host(lpfc_shost_from_vport(vport));
ndlp = lpfc_findnode_did(phba->pport, Fabric_DID);
- if (ndlp && ndlp->nlp_state == NLP_STE_UNMAPPED_NODE &&
+
+ /* In case of driver unload, we shall not perform fabric logo as the
+ * worker thread already stopped at this stage and, in this case, we
+ * can safely skip the fabric logo.
+ */
+ if (phba->pport->load_flag & FC_UNLOADING) {
+ if (ndlp && NLP_CHK_NODE_ACT(ndlp) &&
+ ndlp->nlp_state == NLP_STE_UNMAPPED_NODE &&
+ phba->link_state >= LPFC_LINK_UP) {
+ /* First look for the Fabric ndlp */
+ ndlp = lpfc_findnode_did(vport, Fabric_DID);
+ if (!ndlp)
+ goto skip_logo;
+ else if (!NLP_CHK_NODE_ACT(ndlp)) {
+ ndlp = lpfc_enable_node(vport, ndlp,
+ NLP_STE_UNUSED_NODE);
+ if (!ndlp)
+ goto skip_logo;
+ }
+ /* Remove ndlp from vport npld list */
+ lpfc_dequeue_node(vport, ndlp);
+
+ /* Indicate free memory when release */
+ spin_lock_irq(&phba->ndlp_lock);
+ NLP_SET_FREE_REQ(ndlp);
+ spin_unlock_irq(&phba->ndlp_lock);
+ /* Kick off release ndlp when it can be safely done */
+ lpfc_nlp_put(ndlp);
+ }
+ goto skip_logo;
+ }
+
+ /* Otherwise, we will perform fabric logo as needed */
+ if (ndlp && NLP_CHK_NODE_ACT(ndlp) &&
+ ndlp->nlp_state == NLP_STE_UNMAPPED_NODE &&
phba->link_state >= LPFC_LINK_UP) {
if (vport->cfg_enable_da_id) {
timeout = msecs_to_jiffies(phba->fc_ratov * 2000);
@@ -519,8 +558,27 @@ lpfc_vport_delete(struct fc_vport *fc_vp
if (!ndlp)
goto skip_logo;
lpfc_nlp_init(vport, ndlp, Fabric_DID);
+ /* Indicate free memory when release */
+ NLP_SET_FREE_REQ(ndlp);
} else {
+ if (!NLP_CHK_NODE_ACT(ndlp))
+ ndlp = lpfc_enable_node(vport, ndlp,
+ NLP_STE_UNUSED_NODE);
+ if (!ndlp)
+ goto skip_logo;
+
+ /* Remove ndlp from vport npld list */
lpfc_dequeue_node(vport, ndlp);
+ spin_lock_irq(&phba->ndlp_lock);
+ if (!NLP_CHK_FREE_REQ(ndlp))
+ /* Indicate free memory when release */
+ NLP_SET_FREE_REQ(ndlp);
+ else {
+ /* Skip this if ndlp is already in free mode */
+ spin_unlock_irq(&phba->ndlp_lock);
+ goto skip_logo;
+ }
+ spin_unlock_irq(&phba->ndlp_lock);
}
vport->unreg_vpi_cmpl = VPORT_INVAL;
timeout = msecs_to_jiffies(phba->fc_ratov * 2000);
@@ -534,9 +592,9 @@ skip_logo:
lpfc_sli_host_down(vport);
lpfc_stop_vport_timers(vport);
- lpfc_unreg_all_rpis(vport);
if (!(phba->pport->load_flag & FC_UNLOADING)) {
+ lpfc_unreg_all_rpis(vport);
lpfc_unreg_default_rpis(vport);
/*
* Completion of unreg_vpi (lpfc_mbx_cmpl_unreg_vpi)
-
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