From: Yi Zou <yi.zou@xxxxxxxxx>
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@xxxxxxxxx>
Signed-off-by: Robert Love <robert.w.love@xxxxxxxxx>
---
drivers/scsi/fcoe/libfcoe.c | 14 ++++++++++++++
1 files changed, 14 insertions(+), 0 deletions(-)
diff --git a/drivers/scsi/fcoe/libfcoe.c b/drivers/scsi/fcoe/libfcoe.c
index 34800af..9823291 100644
--- a/drivers/scsi/fcoe/libfcoe.c
+++ b/drivers/scsi/fcoe/libfcoe.c
@@ -562,14 +562,28 @@ EXPORT_SYMBOL(fcoe_ctlr_els_send);
* times its keep-alive period including fuzz.
*
* In addition, determine the time when an FCF selection can occur.
+ *
+ * Also, increment the MissDiscAdvCount when no advertisement is received
+ * for the corresponding FCF for 1.5 * FKA_ADV_PERIOD (FC-BB-5 LESB).
*/
static void fcoe_ctlr_age_fcfs(struct fcoe_ctlr *fip)
{
struct fcoe_fcf *fcf;
struct fcoe_fcf *next;
unsigned long sel_time = 0;
+ unsigned long mda_time = 0;
list_for_each_entry_safe(fcf, next, &fip->fcfs, list) {
+ mda_time = fcf->fka_period + (fcf->fka_period >> 1);
+ if ((fip->sel_fcf == fcf) &&
+ (time_after(jiffies, fcf->time + mda_time))) {
+ mod_timer(&fip->timer, jiffies + mda_time);
+ fc_lport_get_stats(fip->lp)->MissDiscAdvCount++;
+ printk(KERN_INFO "libfcoe: host%d: Missing Discovery "
+ "Advertisement for fab %llx count %lld\n",
+ fip->lp->host->host_no, fcf->fabric_name,
+ fc_lport_get_stats(fip->lp)->MissDiscAdvCount);
+ }
if (time_after(jiffies, fcf->time + fcf->fka_period * 3 +
msecs_to_jiffies(FIP_FCF_FUZZ * 3))) {
if (fip->sel_fcf == fcf)
--
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