From 70c948206f0616c7e46130a26165b6a5d98bade4 Mon Sep 17 00:00:00 2001
From: Xiubo Li <xiubli@redhat.com>
Date: Thu, 19 Mar 2020 23:45:02 -0400
Subject: ceph: add metadata perf metric support

Add a new "r_ended" field to struct ceph_mds_request and use that to
maintain the average latency of MDS requests.

URL: https://tracker.ceph.com/issues/43215
Signed-off-by: Xiubo Li <xiubli@redhat.com>
Reviewed-by: Jeff Layton <jlayton@kernel.org>
Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
---
 fs/ceph/mds_client.h | 3 +++
 1 file changed, 3 insertions(+)

(limited to 'fs/ceph/mds_client.h')

diff --git a/fs/ceph/mds_client.h b/fs/ceph/mds_client.h
index 605995ae3718..cceeb33f2ff9 100644
--- a/fs/ceph/mds_client.h
+++ b/fs/ceph/mds_client.h
@@ -10,6 +10,7 @@
 #include <linux/spinlock.h>
 #include <linux/refcount.h>
 #include <linux/utsname.h>
+#include <linux/ktime.h>
 
 #include <linux/ceph/types.h>
 #include <linux/ceph/messenger.h>
@@ -299,6 +300,8 @@ struct ceph_mds_request {
 
 	unsigned long r_timeout;  /* optional.  jiffies, 0 is "wait forever" */
 	unsigned long r_started;  /* start time to measure timeout against */
+	unsigned long r_start_latency;  /* start time to measure latency */
+	unsigned long r_end_latency;    /* finish time to measure latency */
 	unsigned long r_request_started; /* start time for mds request only,
 					    used to measure lease durations */
 
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