tree 8cd8fc4de72cf9a1a56e45518019a3cae106515a
parent 8627921fa2ef6d40fd9b787e163ba3a9ff8f471d
author Mikulas Patocka <mpatocka@redhat.com> 1245661945 +0100
committer Alasdair G Kergon <agk@redhat.com> 1245661945 +0100

dm snapshot: support barriers

Flush support for dm-snapshot target.

This patch just forwards the flush request to either the origin or the snapshot
device.  (It doesn't flush exception store metadata.)

Signed-off-by: Mikulas Patocka <mpatocka@redhat.com>
Signed-off-by: Alasdair G Kergon <agk@redhat.com>