[Qemu-devel] [PATCH v7 6/9] block: support BDRV_REQ_ALLOCATE in passthrough drivers

[Anton Nefedov <anton.nefedov@virtuozzo.com>]

Support the flag if the underlying BDS supports it

Signed-off-by: Anton Nefedov <anton.nefedov@virtuozzo.com>
Reviewed-by: Alberto Garcia <berto@igalia.com>
---
 block/blkdebug.c   | 3 ++-
 block/blkverify.c  | 2 +-
 block/mirror.c     | 2 +-
 block/raw-format.c | 3 ++-
 4 files changed, 6 insertions(+), 4 deletions(-)

diff --git a/block/blkdebug.c b/block/blkdebug.c
index e216699..7d5773d 100644
--- a/block/blkdebug.c
+++ b/block/blkdebug.c
@@ -400,7 +400,8 @@ 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/blkverify.c b/block/blkverify.c
index 9ba65d0..b249636 100644
--- a/block/blkverify.c
+++ b/block/blkverify.c
@@ -145,7 +145,7 @@ static int blkverify_open(BlockDriverState *bs, QDict *options, int flags,
         s->test_file->bs->supported_write_flags;
 
     bs->supported_zero_flags =
-        (BDRV_REQ_FUA | BDRV_REQ_MAY_UNMAP) &
+        (BDRV_REQ_FUA | BDRV_REQ_MAY_UNMAP | BDRV_REQ_ALLOCATE) &
         bs->file->bs->supported_zero_flags &
         s->test_file->bs->supported_zero_flags;
 
diff --git a/block/mirror.c b/block/mirror.c
index d18ec65..eb41deb 100644
--- a/block/mirror.c
+++ b/block/mirror.c
@@ -1067,7 +1067,7 @@ static void bdrv_mirror_top_refresh_filename(BlockDriverState *bs, QDict *opts)
     bs->supported_write_flags = BDRV_REQ_FUA &
         bs->backing->bs->supported_write_flags;
     bs->supported_zero_flags =
-        (BDRV_REQ_FUA | BDRV_REQ_MAY_UNMAP) &
+        (BDRV_REQ_FUA | BDRV_REQ_MAY_UNMAP | BDRV_REQ_ALLOCATE) &
         bs->backing->bs->supported_zero_flags;
 }
 
diff --git a/block/raw-format.c b/block/raw-format.c
index ab552c0..b1deb93 100644
--- a/block/raw-format.c
+++ b/block/raw-format.c
@@ -416,7 +416,8 @@ 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