On 22.11.19 17:05, Kevin Wolf wrote:
> In the common case, qcow2_co_pwrite_zeroes() already only modifies
> metadata case, so we're fine with or without BDRV_REQ_NO_FALLBACK set.
> 
> The only exception is when using an external data file, where the
> request is passed down to the block driver of the external data file. We
> are forwarding the BDRV_REQ_NO_FALLBACK flag there, though, so this is
> fine, too.
> 
> Declare the flag supported therefore.
> 
> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
> ---
>  block/qcow2.c | 3 ++-
>  1 file changed, 2 insertions(+), 1 deletion(-)

Reviewed-by: Max Reitz <mreitz@redhat.com>