From: Xiubo Li <xiubli@redhat.com>
Date: Tue, 7 Feb 2023 05:04:52 +0000 (+0800)
Subject: ceph: flush cap releases when the session is flushed
X-Git-Tag: v6.1.15~235
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=a89868254cd2079b800361e68f39ac4e57293080;p=platform%2Fkernel%2Flinux-starfive.git

ceph: flush cap releases when the session is flushed

commit e7d84c6a1296d059389f7342d9b4b7defb518d3a upstream.

MDS expects the completed cap release prior to responding to the
session flush for cache drop.

Cc: stable@vger.kernel.org
Link: http://tracker.ceph.com/issues/38009
Signed-off-by: Xiubo Li <xiubli@redhat.com>
Reviewed-by: Venky Shankar <vshankar@redhat.com>
Reviewed-by: Jeff Layton <jlayton@kernel.org>
Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---

diff --git a/fs/ceph/mds_client.c b/fs/ceph/mds_client.c
index 26a0a8b..756560d 100644
--- a/fs/ceph/mds_client.c
+++ b/fs/ceph/mds_client.c
@@ -3662,6 +3662,12 @@ static void handle_session(struct ceph_mds_session *session,
 		break;
 
 	case CEPH_SESSION_FLUSHMSG:
+		/* flush cap releases */
+		spin_lock(&session->s_cap_lock);
+		if (session->s_num_cap_releases)
+			ceph_flush_cap_releases(mdsc, session);
+		spin_unlock(&session->s_cap_lock);
+
 		send_flushmsg_ack(mdsc, session, seq);
 		break;