Re: [PATCH V5] block/rbd: implement bdrv_co_block_status

[Kevin Wolf]

Am 12.10.2021 um 17:22 hat Peter Lieven geschrieben:
> the qemu rbd driver currently lacks support for bdrv_co_block_status.
> This results mainly in incorrect progress during block operations (e.g.
> qemu-img convert with an rbd image as source).
> 
> This patch utilizes the rbd_diff_iterate2 call from librbd to detect
> allocated and unallocated (all zero areas).
> 
> To avoid querying the ceph OSDs for the answer this is only done if
> the image has the fast-diff feature which depends on the object-map and
> exclusive-lock features. In this case it is guaranteed that the information
> is present in memory in the librbd client and thus very fast.
> 
> If fast-diff is not available all areas are reported to be allocated
> which is the current behaviour if bdrv_co_block_status is not implemented.
> 
> Signed-off-by: Peter Lieven <pl@kamp.de>

Thanks, applied to the block branch.

Kevin