[Qemu-block] [PATCH v10 1/9] mirror: inherit supported write/zero flags

[Anton Nefedov]

Signed-off-by: Anton Nefedov <anton.nefe...@virtuozzo.com>
---
 block/mirror.c | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/block/mirror.c b/block/mirror.c
index 56d9ef7474..56908c9b19 100644
--- a/block/mirror.c
+++ b/block/mirror.c
@@ -1528,8 +1528,12 @@ static void mirror_start_job(const char *job_id, 
BlockDriverState *bs,
         mirror_top_bs->implicit = true;
     }
     mirror_top_bs->total_sectors = bs->total_sectors;
-    mirror_top_bs->supported_write_flags = BDRV_REQ_WRITE_UNCHANGED;
-    mirror_top_bs->supported_zero_flags = BDRV_REQ_WRITE_UNCHANGED;
+    mirror_top_bs->supported_write_flags = BDRV_REQ_WRITE_UNCHANGED |
+        (BDRV_REQ_FUA & bs->supported_write_flags);
+    mirror_top_bs->supported_zero_flags = BDRV_REQ_WRITE_UNCHANGED |
+        ((BDRV_REQ_FUA | BDRV_REQ_MAY_UNMAP)
+         & bs->supported_zero_flags);
+
     bs_opaque = g_new0(MirrorBDSOpaque, 1);
     mirror_top_bs->opaque = bs_opaque;
     bdrv_set_aio_context(mirror_top_bs, bdrv_get_aio_context(bs));
-- 
2.17.1