[libvirt] [PATCH 8/9] qemu: capabilities: Lock out incremental backup capability without blockdev

[Cole Robinson]

On 11/25/19 7:53 AM, Peter Krempa wrote:
> Blockdev is required to do incremental backups properly. Add a helper
> function for locking out capabilities and export it to allow re-doing
> the processing if a different code path modifies capabilities.
> 
> Signed-off-by: Peter Krempa <pkrempa at redhat.com>
> ---
>  src/qemu/qemu_capabilities.c | 17 +++++++++++++++++
>  src/qemu/qemu_capabilities.h |  2 ++
>  2 files changed, 19 insertions(+)
> 

Reviewed-by: Cole Robinson <crobinso at redhat.com>

this made me go look at the case that _BLOCKDEV is disabled. bus='sd',
hmm that's unfortunate. Do you know if there's qemu plans to make it
-blockdev compatible? Maybe -machine option like was done with -pflash?
Or are we stuck with that indefinitely?

Thanks,
Cole