diff options
| -rw-r--r-- | include/block/block.h | 4 | ||||
| -rw-r--r-- | qemu-img.c | 1 |
2 files changed, 5 insertions, 0 deletions
diff --git a/include/block/block.h b/include/block/block.h index 467fb2ba0a..27d8598eec 100644 --- a/include/block/block.h +++ b/include/block/block.h @@ -34,6 +34,10 @@ typedef struct BlockDriverInfo { * opened with BDRV_O_UNMAP flag for this to work. */ bool can_write_zeroes_with_unmap; + /* + * True if this block driver only supports compressed writes + */ + bool needs_compressed_writes; } BlockDriverInfo; typedef struct BlockFragInfo { diff --git a/qemu-img.c b/qemu-img.c index 317bc6c1cd..04ce02aeb4 100644 --- a/qemu-img.c +++ b/qemu-img.c @@ -1502,6 +1502,7 @@ static int img_convert(int argc, char **argv) goto out; } } else { + compress = compress || bdi.needs_compressed_writes; cluster_sectors = bdi.cluster_size / BDRV_SECTOR_SIZE; } |