net: Add is_vhost_user flag to vhost_net struct

Introduce a boolean is_vhost_user field to the vhost_net
structure. This flag is initialized during vhost_net_init based
on whether the backend is vhost-user.

This refactoring simplifies checks for vhost-user specific behavior,
replacing direct comparisons of 'net->nc->info->type' with the new
flag. It improves readability and encapsulates the backend type
information directly within the vhost_net instance.

Signed-off-by: Laurent Vivier <lvivier@redhat.com>
Signed-off-by: Jason Wang <jasowang@redhat.com>

1 files changed, 6 insertions, 2 deletions

diff --git a/hw/net/virtio-net.c b/hw/net/virtio-net.c
index 39fc280839..00df5fd6cd 100644
--- a/hw/net/virtio-net.c
+++ b/hw/net/virtio-net.c
@@ -691,12 +691,14 @@ default_value:
 static int peer_attach(VirtIONet *n, int index)
 {
     NetClientState *nc = qemu_get_subqueue(n->nic, index);
+    struct vhost_net *net;
 
     if (!nc->peer) {
         return 0;
     }
 
-    if (nc->peer->info->type == NET_CLIENT_DRIVER_VHOST_USER) {
+    net = get_vhost_net(nc->peer);
+    if (net && net->is_vhost_user) {
         vhost_net_set_vring_enable(nc->peer, 1);
     }
 
@@ -714,12 +716,14 @@ static int peer_attach(VirtIONet *n, int index)
 static int peer_detach(VirtIONet *n, int index)
 {
     NetClientState *nc = qemu_get_subqueue(n->nic, index);
+    struct vhost_net *net;
 
     if (!nc->peer) {
         return 0;
     }
 
-    if (nc->peer->info->type == NET_CLIENT_DRIVER_VHOST_USER) {
+    net = get_vhost_net(nc->peer);
+    if (net && net->is_vhost_user) {
         vhost_net_set_vring_enable(nc->peer, 0);
     }