diff mbox series

[v5,01/15] mirror: inherit supported write/zero flags

Message ID 1509551048-129830-2-git-send-email-anton.nefedov@virtuozzo.com
State New
Headers show
Series qcow2: space preallocation and COW improvements | expand

Commit Message

Anton Nefedov Nov. 1, 2017, 3:43 p.m. UTC 
Signed-off-by: Anton Nefedov <anton.nefedov@virtuozzo.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
---
 block/mirror.c | 5 +++++
 1 file changed, 5 insertions(+)

Comments

Alberto Garcia Jan. 11, 2018, 2:14 p.m. UTC | #1 
On Wed 01 Nov 2017 04:43:54 PM CET, Anton Nefedov wrote:
> Signed-off-by: Anton Nefedov <anton.nefedov@virtuozzo.com>
> Reviewed-by: Eric Blake <eblake@redhat.com>

Reviewed-by: Alberto Garcia <berto@igalia.com>

Berto
diff mbox series

Patch

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)