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
We assume there's no cvq in the past, this is not true when we need control virtqueue support for vhost-user backends. So this patch implements the control virtqueue support for vhost-net. As datapath, the control virtqueue is also required to be coupled with the NetClientState. The vhost_net_start/stop() are tweaked to accept the number of datapath queue pairs plus the the number of control virtqueue for us to start and stop the vhost device. Signed-off-by: Jason Wang <jasowang@redhat.com> Message-Id: <20211020045600.16082-7-jasowang@redhat.com> Reviewed-by: Michael S. Tsirkin <mst@redhat.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com>