dm thin: set flush_supported

The thin provisioning target commits internal metadata on flush.  So it
should receive flushes regardless of whether the underlying devices
support them.

Signed-off-by: Joe Thornber <ejt@redhat.com>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
Signed-off-by: Alasdair G Kergon <agk@redhat.com>

diff --git a/drivers/md/dm-thin.c b/drivers/md/dm-thin.c
index 7510cb3d571c1f8693b8087ee4e9057c811f8dc2..ee5a3fc93b0e4f6550f2051a549f55415c251acb 100644 (file)
--- a/drivers/md/dm-thin.c
+++ b/drivers/md/dm-thin.c
@@ -2652,6 +2652,7 @@ static int thin_ctr(struct dm_target *ti, unsigned argc, char **argv)
                goto bad_thin_open;
 
        ti->num_flush_requests = 1;
+       ti->flush_supported = true;
 
        /* In case the pool supports discards, pass them on. */
        if (tc->pool->pf.discard_enabled) {