On 12.08.19 20:11, Vladimir Sementsov-Ogievskiy wrote:
> Hi all!
> 
> I'm not sure, is it a bug or a feature, but using qcow2 under raw is
> broken. It should be either fixed like I propose (by Max's suggestion)
> or somehow forbidden (just forbid backing-file supporting node to be
> file child of raw-format node).

I agree, I think only filters should return BDRV_BLOCK_RAW.

(And not even them, they should just be handled transparently by
bdrv_co_block_status().  But that’s something for later.)

> Vladimir Sementsov-Ogievskiy (2):
>   block/raw-format: switch to BDRV_BLOCK_DATA with BDRV_BLOCK_RECURSE
>   iotests: test mirroring qcow2 under raw format
> 
>  block/raw-format.c         |  2 +-
>  tests/qemu-iotests/263     | 46 ++++++++++++++++++++++++++++++++++++++
>  tests/qemu-iotests/263.out | 12 ++++++++++
>  tests/qemu-iotests/group   |  1 +
>  4 files changed, 60 insertions(+), 1 deletion(-)
>  create mode 100755 tests/qemu-iotests/263
>  create mode 100644 tests/qemu-iotests/263.out

Thanks, applied to my block-next branch:

https://git.xanclic.moe/XanClic/qemu/commits/branch/block-next

Max