[PATCH v2 2/3] ceph: don't WARN if we're force umounting

[xiubli@redhat.com]

From: Xiubo Li <xiubli@redhat.com>

Force umount will try to close the sessions by setting the session
state to _CLOSING, so in ceph_kill_sb after that it will warn on it.

URL: https://tracker.ceph.com/issues/52295
Signed-off-by: Xiubo Li <xiubli@redhat.com>
---
 fs/ceph/mds_client.c | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/fs/ceph/mds_client.c b/fs/ceph/mds_client.c
index df10f9b33660..5831c7e137ee 100644
--- a/fs/ceph/mds_client.c
+++ b/fs/ceph/mds_client.c
@@ -4560,6 +4560,8 @@ static void maybe_recover_session(struct ceph_mds_client *mdsc)
 
 bool check_session_state(struct ceph_mds_session *s)
 {
+	struct ceph_fs_client *fsc = s->s_mdsc->fsc;
+
 	switch (s->s_state) {
 	case CEPH_MDS_SESSION_OPEN:
 		if (s->s_ttl && time_after(jiffies, s->s_ttl)) {
@@ -4568,8 +4570,9 @@ 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(s->s_ttl);
+		/* Should never reach this when none force unmounting */
+		WARN_ON_ONCE(s->s_ttl &&
+			     READ_ONCE(fsc->mount_state) != CEPH_MOUNT_SHUTDOWN);
 		fallthrough;
 	case CEPH_MDS_SESSION_NEW:
 	case CEPH_MDS_SESSION_RESTARTING:
-- 
2.27.0