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 <f...@redhat.com>
---
include/block/block.h | 1 +
qemu-img.c | 5 ++++-
2 files changed, 5 insertions(+), 1 deletion(-)
diff --git a/include/block/block.h b/include/block/block.h
index 3560deb..169c092 100644
--- a/include/block/block.h
+++ b/include/block/block.h
@@ -18,6 +18,7 @@ typedef struct BlockDriverInfo {
/* offset at which the VM state can be saved (0 if not possible) */
int64_t vm_state_offset;
bool is_dirty;
+ bool is_compressed;
} BlockDriverInfo;
typedef struct BlockFragInfo {
diff --git a/qemu-img.c b/qemu-img.c
index bf3fb4f..09ed9b2 100644
--- a/qemu-img.c
+++ b/qemu-img.c
@@ -1383,8 +1383,11 @@ static int img_convert(int argc, char **argv)
}
}
+ ret = bdrv_get_info(out_bs, &bdi);
+ if (ret == 0) {
+ compress = compress || bdi.is_compressed;
+ }
if (compress) {
- ret = bdrv_get_info(out_bs, &bdi);
if (ret < 0) {
error_report("could not get block driver info");
goto out;
--
1.8.4.2
