| commit | 3ee25485ba8e8271fe9401eef5003c20ab648ddf | [log] [tgz] |
|---|---|---|
| author | Mike Snitzer <snitzer@redhat.com> | Wed Jul 17 11:12:30 2019 -0400 |
| committer | Mike Snitzer <snitzer@redhat.com> | Wed Jul 17 11:12:30 2019 -0400 |
| tree | ba1c9bde48555434b3343143d2f84fcf8770c037 | |
| parent | 3b8cafdd5436f9298b3bf6eb831df5eef5ee82b6 [diff] |
dm snapshot: fix oversights in optional discard support
__find_snapshots_sharing_cow() should always be used with _origins_lock
held so fix snapshot_io_hints() accordingly. Also, once a snapshot is
being merged discards must not be allowed -- otherwise incorrect or
duplicate work will be performed.
Fixes: 2e6023850e177d ("dm snapshot: add optional discard support features")
Reported-by: Nikos Tsironis <ntsironis@arrikto.com>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>