Merge tag 'ceph-for-5.9-rc1' of git://github.com/ceph/ceph-client

Pull ceph updates from Ilya Dryomov:
 "Xiubo has completed his work on filesystem client metrics, they are
  sent to all available MDSes once per second now.

  Other than that, we have a lot of fixes and cleanups all around the
  filesystem, including a tweak to cut down on MDS request resends in
  multi-MDS setups from Yanhu and fixups for SELinux symlink labeling
  and MClientSession message decoding from Jeff"

* tag 'ceph-for-5.9-rc1' of git://github.com/ceph/ceph-client: (22 commits)
  ceph: handle zero-length feature mask in session messages
  ceph: use frag's MDS in either mode
  ceph: move sb->wb_pagevec_pool to be a global mempool
  ceph: set sec_context xattr on symlink creation
  ceph: remove redundant initialization of variable mds
  ceph: fix use-after-free for fsc->mdsc
  ceph: remove unused variables in ceph_mdsmap_decode()
  ceph: delete repeated words in fs/ceph/
  ceph: send client provided metric flags in client metadata
  ceph: periodically send perf metrics to MDSes
  ceph: check the sesion state and return false in case it is closed
  libceph: replace HTTP links with HTTPS ones
  ceph: remove unnecessary cast in kfree()
  libceph: just have osd_req_op_init() return a pointer
  ceph: do not access the kiocb after aio requests
  ceph: clean up and optimize ceph_check_delayed_caps()
  ceph: fix potential mdsc use-after-free crash
  ceph: switch to WARN_ON_ONCE in encode_supported_features()
  ceph: add global total_caps to count the mdsc's total caps number
  ceph: add check_session_state() helper and make it global
  ...

1 files changed, 3 insertions, 13 deletions

diff --git a/fs/ceph/debugfs.c b/fs/ceph/debugfs.c
index 070ed8481340..97539b497e4c 100644
--- a/fs/ceph/debugfs.c
+++ b/fs/ceph/debugfs.c
@@ -145,7 +145,7 @@ static int metric_show(struct seq_file *s, void *p)
 	struct ceph_fs_client *fsc = s->private;
 	struct ceph_mds_client *mdsc = fsc->mdsc;
 	struct ceph_client_metric *m = &mdsc->metric;
-	int i, nr_caps = 0;
+	int nr_caps = 0;
 	s64 total, sum, avg, min, max, sq;
 
 	seq_printf(s, "item          total       avg_lat(us)     min_lat(us)     max_lat(us)     stdev(us)\n");
@@ -190,17 +190,7 @@ static int metric_show(struct seq_file *s, void *p)
 		   percpu_counter_sum(&m->d_lease_mis),
 		   percpu_counter_sum(&m->d_lease_hit));
 
-	mutex_lock(&mdsc->mutex);
-	for (i = 0; i < mdsc->max_sessions; i++) {
-		struct ceph_mds_session *s;
-
-		s = __ceph_lookup_mds_session(mdsc, i);
-		if (!s)
-			continue;
-		nr_caps += s->s_nr_caps;
-		ceph_put_mds_session(s);
-	}
-	mutex_unlock(&mdsc->mutex);
+	nr_caps = atomic64_read(&m->total_caps);
 	seq_printf(s, "%-14s%-16d%-16lld%lld\n", "caps", nr_caps,
 		   percpu_counter_sum(&m->i_caps_mis),
 		   percpu_counter_sum(&m->i_caps_hit));
@@ -272,7 +262,7 @@ static int mds_sessions_show(struct seq_file *s, void *ptr)
 	struct ceph_mds_client *mdsc = fsc->mdsc;
 	struct ceph_auth_client *ac = fsc->client->monc.auth;
 	struct ceph_options *opt = fsc->client->options;
-	int mds = -1;
+	int mds;
 
 	mutex_lock(&mdsc->mutex);