diff options
| author | Fam Zheng <famz@redhat.com> | 2014-05-06 21:08:43 +0800 |
|---|---|---|
| committer | Stefan Hajnoczi <stefanha@redhat.com> | 2014-05-09 13:32:16 +0200 |
| commit | 85f49cad879adfb5c3cbdc47ca3c3b50eb8f40bc (patch) | |
| tree | 1600d9060ee2ffebfa8b95af4f4338aaf1896fc1 | |
| parent | ec209aca8340be1c81afe13fbe0ba135e5d3b9f4 (diff) | |
qemu-img: Convert by cluster size if target is compressed
If target block driver forces compression, qemu-img convert needs to
write by cluster size as well as "-c" option.
Particularly, this applies for converting to VMDK streamOptimized
format.
Signed-off-by: Fam Zheng <famz@redhat.com>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
| -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; } |