[Qemu-devel] [PATCH v3 04/13] block: support BDRV_REQ_ALLOCATE in passthrough drivers

[Anton Nefedov]

Support the flag if the underlying BDS supports it

Signed-off-by: Anton Nefedov <anton.nefe...@virtuozzo.com>
---
 block/blkdebug.c   | 3 ++-
 block/raw-format.c | 3 ++-
 2 files changed, 4 insertions(+), 2 deletions(-)

diff --git a/block/blkdebug.c b/block/blkdebug.c
index c19ab28..ef2d764 100644
--- a/block/blkdebug.c
+++ b/block/blkdebug.c
@@ -414,7 +414,8 @@ static int blkdebug_open(BlockDriverState *bs, QDict 
*options, int flags,
 
     bs->supported_write_flags = BDRV_REQ_FUA &
         bs->file->bs->supported_write_flags;
-    bs->supported_zero_flags = (BDRV_REQ_FUA | BDRV_REQ_MAY_UNMAP) &
+    bs->supported_zero_flags =
+        (BDRV_REQ_FUA | BDRV_REQ_MAY_UNMAP | BDRV_REQ_ALLOCATE) &
         bs->file->bs->supported_zero_flags;
     ret = -EINVAL;
 
diff --git a/block/raw-format.c b/block/raw-format.c
index 142649e..fc97a7d 100644
--- a/block/raw-format.c
+++ b/block/raw-format.c
@@ -421,7 +421,8 @@ static int raw_open(BlockDriverState *bs, QDict *options, 
int flags,
     bs->sg = bs->file->bs->sg;
     bs->supported_write_flags = BDRV_REQ_FUA &
         bs->file->bs->supported_write_flags;
-    bs->supported_zero_flags = (BDRV_REQ_FUA | BDRV_REQ_MAY_UNMAP) &
+    bs->supported_zero_flags =
+        (BDRV_REQ_FUA | BDRV_REQ_MAY_UNMAP | BDRV_REQ_ALLOCATE) &
         bs->file->bs->supported_zero_flags;
 
     if (bs->probed && !bdrv_is_read_only(bs)) {
-- 
2.7.4