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Message-Id: <20191001164505.16708-6-sashal@kernel.org>
Date: Tue, 1 Oct 2019 12:44:52 -0400
From: Sasha Levin <sashal@...nel.org>
To: linux-kernel@...r.kernel.org, stable@...r.kernel.org
Cc: Erqi Chen <chenerqi@...il.com>, "Yan, Zheng" <zyan@...hat.com>,
Jeff Layton <jlayton@...nel.org>,
Ilya Dryomov <idryomov@...il.com>,
Sasha Levin <sashal@...nel.org>, ceph-devel@...r.kernel.org
Subject: [PATCH AUTOSEL 4.9 06/19] ceph: reconnect connection if session hang in opening state
From: Erqi Chen <chenerqi@...il.com>
[ Upstream commit 71a228bc8d65900179e37ac309e678f8c523f133 ]
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@...il.com
Reviewed-by: "Yan, Zheng" <zyan@...hat.com>
Signed-off-by: Jeff Layton <jlayton@...nel.org>
Signed-off-by: Ilya Dryomov <idryomov@...il.com>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
fs/ceph/mds_client.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/fs/ceph/mds_client.c b/fs/ceph/mds_client.c
index 67cb9d078bfa7..3139fbd4c34e3 100644
--- a/fs/ceph/mds_client.c
+++ b/fs/ceph/mds_client.c
@@ -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;
--
2.20.1
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