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authorJames Smart <James.Smart@Emulex.Com>2008-08-24 21:49:45 -0400
committerJames Bottomley <James.Bottomley@HansenPartnership.com>2008-10-13 09:28:53 -0400
commit90160e010b6f3a91a9bb044bbe6723731e6f366c (patch)
tree8320400d5bed96f1976cef88adcad647fcb48f9e /drivers/scsi/lpfc/lpfc_vport.c
parente59058c44025d71c9b7f260076a932935d3bba95 (diff)
[SCSI] lpfc 8.2.8 : Miscellaneous Discovery Fixes
Miscellaneous Discovery fixes: - Fix rejection followed by acceptance in handling RPL and RPS unsolicited events - Fix for vport delete crash - Fix PLOGI vs ADISC race condition Signed-off-by: James Smart <james.smart@emulex.com> Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
Diffstat (limited to 'drivers/scsi/lpfc/lpfc_vport.c')
-rw-r--r--drivers/scsi/lpfc/lpfc_vport.c74
1 files changed, 74 insertions, 0 deletions
diff --git a/drivers/scsi/lpfc/lpfc_vport.c b/drivers/scsi/lpfc/lpfc_vport.c
index 109f89d9883..ad0f6531387 100644
--- a/drivers/scsi/lpfc/lpfc_vport.c
+++ b/drivers/scsi/lpfc/lpfc_vport.c
@@ -204,6 +204,77 @@ lpfc_unique_wwpn(struct lpfc_hba *phba, struct lpfc_vport *new_vport)
return 1;
}
+/**
+ * lpfc_discovery_wait: Wait for driver discovery to quiesce.
+ * @vport: The virtual port for which this call is being executed.
+ *
+ * This driver calls this routine specifically from lpfc_vport_delete
+ * to enforce a synchronous execution of vport
+ * delete relative to discovery activities. The
+ * lpfc_vport_delete routine should not return until it
+ * can reasonably guarantee that discovery has quiesced.
+ * Post FDISC LOGO, the driver must wait until its SAN teardown is
+ * complete and all resources recovered before allowing
+ * cleanup.
+ *
+ * This routine does not require any locks held.
+ **/
+static void lpfc_discovery_wait(struct lpfc_vport *vport)
+{
+ struct lpfc_hba *phba = vport->phba;
+ uint32_t wait_flags = 0;
+ unsigned long wait_time_max;
+ unsigned long start_time;
+
+ wait_flags = FC_RSCN_MODE | FC_RSCN_DISCOVERY | FC_NLP_MORE |
+ FC_RSCN_DEFERRED | FC_NDISC_ACTIVE | FC_DISC_TMO;
+
+ /*
+ * The time constraint on this loop is a balance between the
+ * fabric RA_TOV value and dev_loss tmo. The driver's
+ * devloss_tmo is 10 giving this loop a 3x multiplier minimally.
+ */
+ wait_time_max = msecs_to_jiffies(((phba->fc_ratov * 3) + 3) * 1000);
+ wait_time_max += jiffies;
+ start_time = jiffies;
+ while (time_before(jiffies, wait_time_max)) {
+ if ((vport->num_disc_nodes > 0) ||
+ (vport->fc_flag & wait_flags) ||
+ ((vport->port_state > LPFC_VPORT_FAILED) &&
+ (vport->port_state < LPFC_VPORT_READY))) {
+ lpfc_printf_log(phba, KERN_INFO, LOG_VPORT,
+ "1833 Vport discovery quiesce Wait:"
+ " vpi x%x state x%x fc_flags x%x"
+ " num_nodes x%x, waiting 1000 msecs"
+ " total wait msecs x%x\n",
+ vport->vpi, vport->port_state,
+ vport->fc_flag, vport->num_disc_nodes,
+ jiffies_to_msecs(jiffies - start_time));
+ msleep(1000);
+ } else {
+ /* Base case. Wait variants satisfied. Break out */
+ lpfc_printf_log(phba, KERN_INFO, LOG_VPORT,
+ "1834 Vport discovery quiesced:"
+ " vpi x%x state x%x fc_flags x%x"
+ " wait msecs x%x\n",
+ vport->vpi, vport->port_state,
+ vport->fc_flag,
+ jiffies_to_msecs(jiffies
+ - start_time));
+ break;
+ }
+ }
+
+ if (time_after(jiffies, wait_time_max))
+ lpfc_printf_log(phba, KERN_ERR, LOG_VPORT,
+ "1835 Vport discovery quiesce failed:"
+ " vpi x%x state x%x fc_flags x%x"
+ " wait msecs x%x\n",
+ vport->vpi, vport->port_state,
+ vport->fc_flag,
+ jiffies_to_msecs(jiffies - start_time));
+}
+
int
lpfc_vport_create(struct fc_vport *fc_vport, bool disable)
{
@@ -602,6 +673,9 @@ lpfc_vport_delete(struct fc_vport *fc_vport)
timeout = schedule_timeout(timeout);
}
+ if (!(phba->pport->load_flag & FC_UNLOADING))
+ lpfc_discovery_wait(vport);
+
skip_logo:
lpfc_cleanup(vport);
lpfc_sli_host_down(vport);