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authorXiubo Li <xiubli@redhat.com>2021-11-05 17:34:18 +0800
committerIlya Dryomov <idryomov@gmail.com>2021-11-08 03:29:52 +0100
commit0e24421ac431e7af62d4acef6c638b85aae51728 (patch)
tree7b04842e1c08dced2704a4d01c8efb2efd612c6e /fs/ceph
parente90334e89b0c3caa64213ba80fbbc053c7975c66 (diff)
ceph: fix mdsmap decode when there are MDS's beyond max_mds
If the max_mds is decreased in a cephfs cluster, there is a window of time before the MDSs are removed. If a map goes out during this period, the mdsmap may show the decreased max_mds but still shows those MDSes as in or in the export target list. Ensure that we don't fail the map decode in that case. Cc: stable@vger.kernel.org URL: https://tracker.ceph.com/issues/52436 Fixes: d517b3983dd3 ("ceph: reconnect to the export targets on new mdsmaps") Signed-off-by: Xiubo Li <xiubli@redhat.com> Reviewed-by: Jeff Layton <jlayton@kernel.org> Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
Diffstat (limited to 'fs/ceph')
-rw-r--r--fs/ceph/mdsmap.c4
1 files changed, 0 insertions, 4 deletions
diff --git a/fs/ceph/mdsmap.c b/fs/ceph/mdsmap.c
index 61d67cbcb367..30387733765d 100644
--- a/fs/ceph/mdsmap.c
+++ b/fs/ceph/mdsmap.c
@@ -263,10 +263,6 @@ struct ceph_mdsmap *ceph_mdsmap_decode(void **p, void *end, bool msgr2)
goto nomem;
for (j = 0; j < num_export_targets; j++) {
target = ceph_decode_32(&pexport_targets);
- if (target >= m->possible_max_rank) {
- err = -EIO;
- goto corrupt;
- }
info->export_targets[j] = target;
}
} else {