diff mbox

[v6,1/9] mirror: inherit supported write/zero flags

Message ID 1516107870-8110-2-git-send-email-anton.nefedov@virtuozzo.com (mailing list archive)
State New, archived
Headers show

Commit Message

Anton Nefedov Jan. 16, 2018, 1:04 p.m. UTC 
Signed-off-by: Anton Nefedov <anton.nefedov@virtuozzo.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Reviewed-by: Alberto Garcia <berto@igalia.com>
---
 block/mirror.c | 5 +++++
 1 file changed, 5 insertions(+)
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Patch

diff --git a/block/mirror.c b/block/mirror.c
index c9badc1..d18ec65 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)