[J][PATCH 2/6] scsi: lpfc: Fix NPIV port deletion crash
Jeff Lane
jeffrey.lane at canonical.com
Tue Feb 8 14:20:10 UTC 2022
From: James Smart <jsmart2021 at gmail.com>
BugLink: https://bugs.launchpad.net/bugs/1956982
The driver is calling schedule_timeout after the DA_ID nameserver request
and LOGO commands are issued to the fabric by the initiator virtual
endport. These fixed delay functions are causing long delays in the
driver's worker thread when processing discovery I/Os in a serialized
fashion, which is then triggering mailbox timeout errors artificially.
To fix this, don't wait on the DA_ID request to complete and call
wait_event_timeout to allow the vport delete thread to make progress on an
event driven basis rather than fixing the wait time.
Link: https://lore.kernel.org/r/20211204002644.116455-5-jsmart2021@gmail.com
Co-developed-by: Justin Tee <justin.tee at broadcom.com>
Signed-off-by: Justin Tee <justin.tee at broadcom.com>
Signed-off-by: James Smart <jsmart2021 at gmail.com>
Signed-off-by: Martin K. Petersen <martin.petersen at oracle.com>
(cherry picked from commit 8ed190a91950564775cbaae9e8e8083a69a8da23)
Signed-off-by: Jeff Lane <jeffrey.lane at canonical.com>
---
drivers/scsi/lpfc/lpfc.h | 2 -
drivers/scsi/lpfc/lpfc_els.c | 11 ++++-
drivers/scsi/lpfc/lpfc_hbadisc.c | 2 -
drivers/scsi/lpfc/lpfc_vport.c | 83 ++++++++++++++++++++++++--------
4 files changed, 73 insertions(+), 25 deletions(-)
diff --git a/drivers/scsi/lpfc/lpfc.h b/drivers/scsi/lpfc/lpfc.h
index 381f0f1b6666..da5a69a2b78f 100644
--- a/drivers/scsi/lpfc/lpfc.h
+++ b/drivers/scsi/lpfc/lpfc.h
@@ -668,8 +668,6 @@ struct lpfc_vport {
struct timer_list els_tmofunc;
struct timer_list delayed_disc_tmo;
- int unreg_vpi_cmpl;
-
uint8_t load_flag;
#define FC_LOADING 0x1 /* HBA in process of loading drvr */
#define FC_UNLOADING 0x2 /* HBA in process of unloading drvr */
diff --git a/drivers/scsi/lpfc/lpfc_els.c b/drivers/scsi/lpfc/lpfc_els.c
index 78024f11b794..db5ccae1b63d 100644
--- a/drivers/scsi/lpfc/lpfc_els.c
+++ b/drivers/scsi/lpfc/lpfc_els.c
@@ -10973,10 +10973,19 @@ lpfc_cmpl_els_npiv_logo(struct lpfc_hba *phba, struct lpfc_iocbq *cmdiocb,
lpfc_can_disctmo(vport);
}
+ if (ndlp->save_flags & NLP_WAIT_FOR_LOGO) {
+ /* Wake up lpfc_vport_delete if waiting...*/
+ if (ndlp->logo_waitq)
+ wake_up(ndlp->logo_waitq);
+ spin_lock_irq(&ndlp->lock);
+ ndlp->nlp_flag &= ~(NLP_ISSUE_LOGO | NLP_LOGO_SND);
+ ndlp->save_flags &= ~NLP_WAIT_FOR_LOGO;
+ spin_unlock_irq(&ndlp->lock);
+ }
+
/* Safe to release resources now. */
lpfc_els_free_iocb(phba, cmdiocb);
lpfc_nlp_put(ndlp);
- vport->unreg_vpi_cmpl = VPORT_ERROR;
}
/**
diff --git a/drivers/scsi/lpfc/lpfc_hbadisc.c b/drivers/scsi/lpfc/lpfc_hbadisc.c
index 5e54ec503f18..816fc406135b 100644
--- a/drivers/scsi/lpfc/lpfc_hbadisc.c
+++ b/drivers/scsi/lpfc/lpfc_hbadisc.c
@@ -3934,7 +3934,6 @@ lpfc_mbx_cmpl_unreg_vpi(struct lpfc_hba *phba, LPFC_MBOXQ_t *pmb)
vport->vpi_state &= ~LPFC_VPI_REGISTERED;
vport->fc_flag |= FC_VPORT_NEEDS_REG_VPI;
spin_unlock_irq(shost->host_lock);
- vport->unreg_vpi_cmpl = VPORT_OK;
mempool_free(pmb, phba->mbox_mem_pool);
lpfc_cleanup_vports_rrqs(vport, NULL);
/*
@@ -3964,7 +3963,6 @@ lpfc_mbx_unreg_vpi(struct lpfc_vport *vport)
lpfc_printf_vlog(vport, KERN_ERR, LOG_TRACE_EVENT,
"1800 Could not issue unreg_vpi\n");
mempool_free(mbox, phba->mbox_mem_pool);
- vport->unreg_vpi_cmpl = VPORT_ERROR;
return rc;
}
return 0;
diff --git a/drivers/scsi/lpfc/lpfc_vport.c b/drivers/scsi/lpfc/lpfc_vport.c
index da9a1f72d938..d694d0cff5a5 100644
--- a/drivers/scsi/lpfc/lpfc_vport.c
+++ b/drivers/scsi/lpfc/lpfc_vport.c
@@ -485,23 +485,68 @@ lpfc_vport_create(struct fc_vport *fc_vport, bool disable)
return rc;
}
+static int
+lpfc_send_npiv_logo(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp)
+{
+ int rc;
+ struct lpfc_hba *phba = vport->phba;
+
+ DECLARE_WAIT_QUEUE_HEAD_ONSTACK(waitq);
+
+ spin_lock_irq(&ndlp->lock);
+ if (!(ndlp->save_flags & NLP_WAIT_FOR_LOGO) &&
+ !ndlp->logo_waitq) {
+ ndlp->logo_waitq = &waitq;
+ ndlp->nlp_fcp_info &= ~NLP_FCP_2_DEVICE;
+ ndlp->nlp_flag |= NLP_ISSUE_LOGO;
+ ndlp->save_flags |= NLP_WAIT_FOR_LOGO;
+ }
+ spin_unlock_irq(&ndlp->lock);
+ rc = lpfc_issue_els_npiv_logo(vport, ndlp);
+ if (!rc) {
+ wait_event_timeout(waitq,
+ (!(ndlp->save_flags & NLP_WAIT_FOR_LOGO)),
+ msecs_to_jiffies(phba->fc_ratov * 2000));
+
+ if (!(ndlp->save_flags & NLP_WAIT_FOR_LOGO))
+ goto logo_cmpl;
+ /* LOGO wait failed. Correct status. */
+ rc = -EINTR;
+ } else {
+ rc = -EIO;
+ }
+
+ /* Error - clean up node flags. */
+ spin_lock_irq(&ndlp->lock);
+ ndlp->nlp_flag &= ~NLP_ISSUE_LOGO;
+ ndlp->save_flags &= ~NLP_WAIT_FOR_LOGO;
+ spin_unlock_irq(&ndlp->lock);
+
+ logo_cmpl:
+ lpfc_printf_vlog(vport, KERN_INFO, LOG_VPORT,
+ "1824 Issue LOGO completes with status %d\n",
+ rc);
+ spin_lock_irq(&ndlp->lock);
+ ndlp->logo_waitq = NULL;
+ spin_unlock_irq(&ndlp->lock);
+ return rc;
+}
+
static int
disable_vport(struct fc_vport *fc_vport)
{
struct lpfc_vport *vport = *(struct lpfc_vport **)fc_vport->dd_data;
struct lpfc_hba *phba = vport->phba;
struct lpfc_nodelist *ndlp = NULL, *next_ndlp = NULL;
- long timeout;
struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
+ /* Can't disable during an outstanding delete. */
+ if (vport->load_flag & FC_UNLOADING)
+ return 0;
+
ndlp = lpfc_findnode_did(vport, Fabric_DID);
- if (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))
- while (vport->unreg_vpi_cmpl == VPORT_INVAL && timeout)
- timeout = schedule_timeout(timeout);
- }
+ if (ndlp && phba->link_state >= LPFC_LINK_UP)
+ (void)lpfc_send_npiv_logo(vport, ndlp);
lpfc_sli_host_down(vport);
@@ -600,7 +645,7 @@ lpfc_vport_delete(struct fc_vport *fc_vport)
struct lpfc_vport *vport = *(struct lpfc_vport **)fc_vport->dd_data;
struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
struct lpfc_hba *phba = vport->phba;
- long timeout;
+ int rc;
if (vport->port_type == LPFC_PHYSICAL_PORT) {
lpfc_printf_vlog(vport, KERN_ERR, LOG_TRACE_EVENT,
@@ -665,15 +710,14 @@ lpfc_vport_delete(struct fc_vport *fc_vport)
phba->fc_topology != LPFC_TOPOLOGY_LOOP) {
if (vport->cfg_enable_da_id) {
/* Send DA_ID and wait for a completion. */
- timeout = msecs_to_jiffies(phba->fc_ratov * 2000);
- if (!lpfc_ns_cmd(vport, SLI_CTNS_DA_ID, 0, 0))
- while (vport->ct_flags && timeout)
- timeout = schedule_timeout(timeout);
- else
+ rc = lpfc_ns_cmd(vport, SLI_CTNS_DA_ID, 0, 0);
+ if (rc) {
lpfc_printf_log(vport->phba, KERN_WARNING,
LOG_VPORT,
"1829 CT command failed to "
- "delete objects on fabric\n");
+ "delete objects on fabric, "
+ "rc %d\n", rc);
+ }
}
/*
@@ -688,11 +732,10 @@ lpfc_vport_delete(struct fc_vport *fc_vport)
ndlp = lpfc_findnode_did(vport, Fabric_DID);
if (!ndlp)
goto skip_logo;
- vport->unreg_vpi_cmpl = VPORT_INVAL;
- timeout = msecs_to_jiffies(phba->fc_ratov * 2000);
- if (!lpfc_issue_els_npiv_logo(vport, ndlp))
- while (vport->unreg_vpi_cmpl == VPORT_INVAL && timeout)
- timeout = schedule_timeout(timeout);
+
+ rc = lpfc_send_npiv_logo(vport, ndlp);
+ if (rc)
+ goto skip_logo;
}
if (!(phba->pport->load_flag & FC_UNLOADING))
--
2.25.1
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