vhost-net: control virtqueue support

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>

1 files changed, 2 insertions, 2 deletions

diff --git a/hw/net/vhost_net-stub.c b/hw/net/vhost_net-stub.c
index a7f4252630..89d71cfb8e 100644
--- a/hw/net/vhost_net-stub.c
+++ b/hw/net/vhost_net-stub.c
@@ -33,13 +33,13 @@ struct vhost_net *vhost_net_init(VhostNetOptions *options)
 
 int vhost_net_start(VirtIODevice *dev,
                     NetClientState *ncs,
-                    int total_queues)
+                    int data_queue_pairs, int cvq)
 {
     return -ENOSYS;
 }
 void vhost_net_stop(VirtIODevice *dev,
                     NetClientState *ncs,
-                    int total_queues)
+                    int data_queue_pairs, int cvq)
 {
 }