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ceph: reconnect connection if session hang in opening state

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[ Upstream commit 71a228bc8d ]

If client mds session is evicted in CEPH_MDS_SESSION_OPENING state,
mds won't send session msg to client, and delayed_work skip
CEPH_MDS_SESSION_OPENING state session, the session hang forever.

Allow ceph_con_keepalive to reconnect a session in OPENING to avoid
session hang. Also, ensure that we skip sessions in RESTARTING and
REJECTED states since those states can't be resurrected by issuing
a keepalive.

Link: https://tracker.ceph.com/issues/41551
Signed-off-by: Erqi Chen chenerqi@gmail.com
Reviewed-by: "Yan, Zheng" <zyan@redhat.com>
Signed-off-by: Jeff Layton <jlayton@kernel.org>
Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Erqi Chen
2019-08-28 21:22:45 +08:00
committed by Greg Kroah-Hartman
parent 3f2533b6ab
commit 60991fefbb
1 changed files with 3 additions and 1 deletions
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4
fs/ceph/mds_client.c
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@@ -3410,7 +3410,9 @@ static void delayed_work(struct work_struct *work)
pr_info("mds%d hung\n", s->s_mds);
}
}
if (s->s_state < CEPH_MDS_SESSION_OPEN) {
if (s->s_state == CEPH_MDS_SESSION_NEW ||
s->s_state == CEPH_MDS_SESSION_RESTARTING ||
s->s_state == CEPH_MDS_SESSION_REJECTED) {
/* this mds is failed or recovering, just wait */
ceph_put_mds_session(s);
continue;