Re: [PATCH v4 2/2] qapi: add '@fdset' feature for BlockdevOptionsVirtioBlkVhostVdpa

[Stefan Hajnoczi <stefanha@redhat.com>]

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On Fri, May 26, 2023 at 05:03:04PM +0200, Stefano Garzarella wrote:
> The virtio-blk-vhost-vdpa driver in libblkio 1.3.0 supports the fd
> passing through the new 'fd' property.
> 
> Since now we are using qemu_open() on '@path' if the virtio-blk driver
> supports the fd passing, let's announce it.
> In this way, the management layer can pass the file descriptor of an
> already opened vhost-vdpa character device. This is useful especially
> when the device can only be accessed with certain privileges.
> 
> Add the '@fdset' feature only when the virtio-blk-vhost-vdpa driver
> in libblkio supports it.
> 
> Suggested-by: Markus Armbruster <armbru@redhat.com>
> Signed-off-by: Stefano Garzarella <sgarzare@redhat.com>
> ---
> 
> Notes:
>     v4:
>     - added this patch to allow libvirt to discover we support fdset [Markus]
> 
>  meson.build          | 4 ++++
>  qapi/block-core.json | 8 +++++++-
>  2 files changed, 11 insertions(+), 1 deletion(-)

Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>

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