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| author | Xiubo Li <xiubli@redhat.com> | 2021-11-05 17:34:18 +0800 |
|---|---|---|
| committer | Ilya Dryomov <idryomov@gmail.com> | 2021-11-08 03:29:52 +0100 |
| commit | 0e24421ac431e7af62d4acef6c638b85aae51728 (patch) | |
| tree | 7b04842e1c08dced2704a4d01c8efb2efd612c6e /fs | |
| parent | e90334e89b0c3caa64213ba80fbbc053c7975c66 (diff) | |
| download | lwn-0e24421ac431e7af62d4acef6c638b85aae51728.tar.gz lwn-0e24421ac431e7af62d4acef6c638b85aae51728.zip | |
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')
| -rw-r--r-- | fs/ceph/mdsmap.c | 4 |
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 { |