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ceph: close stopped mds' session 

If a mds has stopped, close its session and clean up its session
requests/caps. The process is similar to handling SESSION_CLOSE
initiated by mds.

Signed-off-by: "Yan, Zheng" <zyan@redhat.com>
Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
This commit is contained in:
Yan, Zheng 2017-03-28 17:56:29 +08:00 committed by Ilya Dryomov
parent 0a07fc8cd0
commit 2827528da0
1 changed files with 16 additions and 0 deletions
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16
fs/ceph/mds_client.c
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@ -3136,6 +3136,22 @@ static void check_new_map(struct ceph_mds_client *mdsc,
__unregister_session(mdsc, s);
__wake_requests(mdsc, &s->s_waiting);
ceph_put_mds_session(s);
} else if (i >= newmap->m_num_mds) {
/* force close session for stopped mds */
get_session(s);
__unregister_session(mdsc, s);
__wake_requests(mdsc, &s->s_waiting);
kick_requests(mdsc, i);
mutex_unlock(&mdsc->mutex);
mutex_lock(&s->s_mutex);
cleanup_session_requests(mdsc, s);
remove_session_caps(s);
mutex_unlock(&s->s_mutex);
ceph_put_mds_session(s);
mutex_lock(&mdsc->mutex);
} else {
/* just close it */
mutex_unlock(&mdsc->mutex);