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From: Sasha Levin <sashal@kernel.org>
To: linux-kernel@vger.kernel.org,
	stable@vger.kernel.org
Cc: Venky Shankar <vshankar@redhat.com>,
	Xiubo Li <xiubli@redhat.com>,
	Ilya Dryomov <idryomov@gmail.com>,
	Sasha Levin <sashal@kernel.org>,
	ceph-devel@vger.kernel.org
Subject: [PATCH AUTOSEL 6.7 31/39] ceph: reinitialize mds feature bit even when session in open
Date: Sun, 28 Jan 2024 11:10:51 -0500
Message-ID: <20240128161130.200783-31-sashal@kernel.org>
In-Reply-To: <20240128161130.200783-1-sashal@kernel.org>
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From: Venky Shankar <vshankar@redhat.com>

[ Upstream commit f48e0342a74d7770cdf1d11894bdc3b6d989b29e ]

Following along the same lines as per the user-space fix. Right
now this isn't really an issue with the ceph kernel driver because
of the feature bit laginess, however, that can change over time
(when the new snaprealm info type is ported to the kernel driver)
and depending on the MDS version that's being upgraded can cause
message decoding issues - so, fix that early on.

Link: http://tracker.ceph.com/issues/63188
Signed-off-by: Venky Shankar <vshankar@redhat.com>
Reviewed-by: Xiubo Li <xiubli@redhat.com>
Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 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 d95eb525519a..558c3af44449 100644
--- a/fs/ceph/mds_client.c
+++ b/fs/ceph/mds_client.c
@@ -4128,12 +4128,12 @@ static void handle_session(struct ceph_mds_session *session,
 			pr_info_client(cl, "mds%d reconnect success\n",
 				       session->s_mds);
 
+		session->s_features = features;
 		if (session->s_state == CEPH_MDS_SESSION_OPEN) {
 			pr_notice_client(cl, "mds%d is already opened\n",
 					 session->s_mds);
 		} else {
 			session->s_state = CEPH_MDS_SESSION_OPEN;
-			session->s_features = features;
 			renewed_caps(mdsc, session, 0);
 			if (test_bit(CEPHFS_FEATURE_METRIC_COLLECT,
 				     &session->s_features))
-- 
2.43.0