[SCSI] libfc: update fcp and exch stats

Updates newly added stats from fc_get_host_stats,
added new function fc_exch_update_stats to
update exches related stats from fc_exch.c
by going thru internal ema_list elements.

Signed-off-by: Vasu Dev <vasu.dev@intel.com>
Acked-by : Robert Love <robert.w.love@intel.com>
Tested-by: Ross Brattain <ross.b.brattain@intel.com>
Signed-off-by: James Bottomley <JBottomley@Parallels.com>

1 files changed, 25 insertions, 5 deletions

diff --git a/drivers/scsi/libfc/fc_exch.c b/drivers/scsi/libfc/fc_exch.c
index 1d0334f83f78..10a6a2a7bfc5 100644
--- a/drivers/scsi/libfc/fc_exch.c
+++ b/drivers/scsi/libfc/fc_exch.c
@@ -99,11 +99,6 @@ struct fc_exch_mgr {
         u16             max_xid;
         u16             pool_max_index;
 
-        /*
-         * currently exchange mgr stats are updated but not used.
-         * either stats can be expose via sysfs or remove them
-         * all together if not used XXX
-         */
         struct {
                 atomic_t no_free_exch;
                 atomic_t no_free_exch_xid;
@@ -2156,6 +2151,31 @@ out:
 }
 
 /**
+ * fc_exch_update_stats() - update exches stats to lport
+ * @lport: The local port to update exchange manager stats
+ */
+void fc_exch_update_stats(struct fc_lport *lport)
+{
+        struct fc_host_statistics *st;
+        struct fc_exch_mgr_anchor *ema;
+        struct fc_exch_mgr *mp;
+
+        st = &lport->host_stats;
+
+        list_for_each_entry(ema, &lport->ema_list, ema_list) {
+                mp = ema->mp;
+                st->fc_no_free_exch += atomic_read(&mp->stats.no_free_exch);
+                st->fc_no_free_exch_xid +=
+                                atomic_read(&mp->stats.no_free_exch_xid);
+                st->fc_xid_not_found += atomic_read(&mp->stats.xid_not_found);
+                st->fc_xid_busy += atomic_read(&mp->stats.xid_busy);
+                st->fc_seq_not_found += atomic_read(&mp->stats.seq_not_found);
+                st->fc_non_bls_resp += atomic_read(&mp->stats.non_bls_resp);
+        }
+}
+EXPORT_SYMBOL(fc_exch_update_stats);
+
+/**
  * fc_exch_mgr_add() - Add an exchange manager to a local port's list of EMs
  * @lport: The local port to add the exchange manager to
  * @mp:    The exchange manager to be added to the local port