diff options
| -rw-r--r-- | block/rbd.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/block/rbd.c b/block/rbd.c index f2d52091c7..331c45adb2 100644 --- a/block/rbd.c +++ b/block/rbd.c @@ -817,6 +817,9 @@ static int qemu_rbd_open(BlockDriverState *bs, QDict *options, int flags, } } + /* When extending regular files, we get zeros from the OS */ + bs->supported_truncate_flags = BDRV_REQ_ZERO_WRITE; + r = 0; goto out; |