Signed-off-by: Anton Nefedov <anton.nefe...@virtuozzo.com>
Reviewed-by: Eric Blake <ebl...@redhat.com>
---
block/mirror.c | 5 +++++
1 file changed, 5 insertions(+)
diff --git a/block/mirror.c b/block/mirror.c
index 307b639..19c8987 100644
--- a/block/mirror.c
+++ b/block/mirror.c
@@ -1064,6 +1064,11 @@ static void
bdrv_mirror_top_refresh_filename(BlockDriverState *bs, QDict *opts)
bdrv_refresh_filename(bs->backing->bs);
pstrcpy(bs->exact_filename, sizeof(bs->exact_filename),
bs->backing->bs->filename);
+ bs->supported_write_flags = BDRV_REQ_FUA &
+ bs->backing->bs->supported_write_flags;
+ bs->supported_zero_flags =
+ (BDRV_REQ_FUA | BDRV_REQ_MAY_UNMAP) &
+ bs->backing->bs->supported_zero_flags;
}
static void bdrv_mirror_top_close(BlockDriverState *bs)
--
2.7.4
