[SCSI] libfc: adds FCP failures stats

Adds stats to track FCP pkt and frame alloc
failure.

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>

2 files changed, 14 insertions, 0 deletions

diff --git a/drivers/scsi/libfc/fc_fcp.c b/drivers/scsi/libfc/fc_fcp.c
index 5c4c504fc105..3c96e9300d00 100644
--- a/drivers/scsi/libfc/fc_fcp.c
+++ b/drivers/scsi/libfc/fc_fcp.c
@@ -158,6 +158,9 @@ static struct fc_fcp_pkt *fc_fcp_pkt_alloc(struct fc_lport *lport, gfp_t gfp)
                 fsp->timer.data = (unsigned long)fsp;
                 INIT_LIST_HEAD(&fsp->list);
                 spin_lock_init(&fsp->scsi_pkt_lock);
+        } else {
+                per_cpu_ptr(lport->stats, get_cpu())->FcpPktAllocFails++;
+                put_cpu();
         }
         return fsp;
 }
@@ -264,6 +267,9 @@ static int fc_fcp_send_abort(struct fc_fcp_pkt *fsp)
         if (!fsp->seq_ptr)
                 return -EINVAL;
 
+        per_cpu_ptr(fsp->lp->stats, get_cpu())->FcpPktAborts++;
+        put_cpu();
+
         fsp->state |= FC_SRB_ABORT_PENDING;
         return fsp->lp->tt.seq_exch_abort(fsp->seq_ptr, 0);
 }
@@ -420,6 +426,8 @@ static inline struct fc_frame *fc_fcp_frame_alloc(struct fc_lport *lport,
         if (likely(fp))
                 return fp;
 
+        per_cpu_ptr(lport->stats, get_cpu())->FcpFrameAllocFails++;
+        put_cpu();
         /* error case */
         fc_fcp_can_queue_ramp_down(lport);
         return NULL;
diff --git a/include/scsi/libfc.h b/include/scsi/libfc.h
index ea52ca203c95..f257a74e6de4 100644
--- a/include/scsi/libfc.h
+++ b/include/scsi/libfc.h
@@ -232,6 +232,9 @@ struct fc_rport_priv {
  * @RxWords:               Number of received words
  * @ErrorFrames:           Number of received error frames
  * @DumpedFrames:          Number of dumped frames
+ * @FcpPktAllocFails:      Number of fcp packet allocation failures
+ * @FcpPktAborts:          Number of fcp packet aborts
+ * @FcpFrameAllocFails:    Number of fcp frame allocation failures
  * @LinkFailureCount:      Number of link failures
  * @LossOfSignalCount:     Number for signal losses
  * @InvalidTxWordCount:    Number of invalid transmitted words
@@ -252,6 +255,9 @@ struct fc_stats {
         u64             RxWords;
         u64             ErrorFrames;
         u64             DumpedFrames;
+        u64             FcpPktAllocFails;
+        u64             FcpPktAborts;
+        u64             FcpFrameAllocFails;
         u64             LinkFailureCount;
         u64             LossOfSignalCount;
         u64             InvalidTxWordCount;