From a706c12da916ef6fd7b31664d1caffe0b1d4a1d3 Mon Sep 17 00:00:00 2001 From: Luis Henriques Date: Thu, 15 Jul 2021 14:40:39 +0100 Subject: [PATCH] ceph: don't WARN if we're still opening a session to an MDS [ Upstream commit cdb330f4b41ab55feb35487729e883c9e08b8a54 ] If MDSs aren't available while mounting a filesystem, the session state will transition from SESSION_OPENING to SESSION_CLOSING. And in that scenario check_session_state() will be called from delayed_work() and trigger this WARN. Avoid this by only WARNing after a session has already been established (i.e., the s_ttl will be different from 0). Fixes: 62575e270f66 ("ceph: check session state after bumping session->s_seq") Signed-off-by: Luis Henriques Reviewed-by: Jeff Layton Signed-off-by: Ilya Dryomov Signed-off-by: Sasha Levin --- fs/ceph/mds_client.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/fs/ceph/mds_client.c b/fs/ceph/mds_client.c index e5af591d3bd45..86f09b1110a2f 100644 --- a/fs/ceph/mds_client.c +++ b/fs/ceph/mds_client.c @@ -4468,7 +4468,7 @@ bool check_session_state(struct ceph_mds_session *s) break; case CEPH_MDS_SESSION_CLOSING: /* Should never reach this when we're unmounting */ - WARN_ON_ONCE(true); + WARN_ON_ONCE(s->s_ttl); fallthrough; case CEPH_MDS_SESSION_NEW: case CEPH_MDS_SESSION_RESTARTING: