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authorYi Zou <yi.zou@intel.com>2009-11-20 17:55:08 -0500
committerJames Bottomley <James.Bottomley@suse.de>2009-12-04 13:01:56 -0500
commitf3da80e76142d63a6849556461906fbe118d1442 (patch)
tree1877df06f90937f7136ee7d59ab0f01af097ee63 /drivers/scsi/fcoe
parent2ec8493f962d55ae85c6716db414c645a6578333 (diff)
[SCSI] libfcoe: add tracking FIP Missing Discovery Advertisement count
Add tracking the Missing Discovery Advertisement count for FIP Fiber Channel Forwarder (FCF) as described in FC-BB-5 Rev2.0 for LESB. The time is 1.5 times the FKA_ADV_PERIOD of the corresponding FCF. Signed-off-by: Yi Zou <yi.zou@intel.com> Signed-off-by: Robert Love <robert.w.love@intel.com> Signed-off-by: James Bottomley <James.Bottomley@suse.de>
Diffstat (limited to 'drivers/scsi/fcoe')
-rw-r--r--drivers/scsi/fcoe/libfcoe.c14
1 files changed, 14 insertions, 0 deletions
diff --git a/drivers/scsi/fcoe/libfcoe.c b/drivers/scsi/fcoe/libfcoe.c
index 34800af808e1..9823291395ad 100644
--- a/drivers/scsi/fcoe/libfcoe.c
+++ b/drivers/scsi/fcoe/libfcoe.c
@@ -562,14 +562,28 @@ EXPORT_SYMBOL(fcoe_ctlr_els_send);
562 * times its keep-alive period including fuzz. 562 * times its keep-alive period including fuzz.
563 * 563 *
564 * In addition, determine the time when an FCF selection can occur. 564 * In addition, determine the time when an FCF selection can occur.
565 *
566 * Also, increment the MissDiscAdvCount when no advertisement is received
567 * for the corresponding FCF for 1.5 * FKA_ADV_PERIOD (FC-BB-5 LESB).
565 */ 568 */
566static void fcoe_ctlr_age_fcfs(struct fcoe_ctlr *fip) 569static void fcoe_ctlr_age_fcfs(struct fcoe_ctlr *fip)
567{ 570{
568 struct fcoe_fcf *fcf; 571 struct fcoe_fcf *fcf;
569 struct fcoe_fcf *next; 572 struct fcoe_fcf *next;
570 unsigned long sel_time = 0; 573 unsigned long sel_time = 0;
574 unsigned long mda_time = 0;
571 575
572 list_for_each_entry_safe(fcf, next, &fip->fcfs, list) { 576 list_for_each_entry_safe(fcf, next, &fip->fcfs, list) {
577 mda_time = fcf->fka_period + (fcf->fka_period >> 1);
578 if ((fip->sel_fcf == fcf) &&
579 (time_after(jiffies, fcf->time + mda_time))) {
580 mod_timer(&fip->timer, jiffies + mda_time);
581 fc_lport_get_stats(fip->lp)->MissDiscAdvCount++;
582 printk(KERN_INFO "libfcoe: host%d: Missing Discovery "
583 "Advertisement for fab %llx count %lld\n",
584 fip->lp->host->host_no, fcf->fabric_name,
585 fc_lport_get_stats(fip->lp)->MissDiscAdvCount);
586 }
573 if (time_after(jiffies, fcf->time + fcf->fka_period * 3 + 587 if (time_after(jiffies, fcf->time + fcf->fka_period * 3 +
574 msecs_to_jiffies(FIP_FCF_FUZZ * 3))) { 588 msecs_to_jiffies(FIP_FCF_FUZZ * 3))) {
575 if (fip->sel_fcf == fcf) 589 if (fip->sel_fcf == fcf)