net: Add get_acked_features callback to VhostNetOptions

This patch continues the effort to decouple the generic vhost layer
from specific network backend implementations.

Previously, the vhost_net initialization code contained a hardcoded
check for the vhost-user client type to retrieve its acked features
by calling vhost_user_get_acked_features(). This exposed an
internal vhost-user function in a public header and coupled the two
modules.

The vhost-user backend is updated to provide a callback, and its
getter function is now static. The call site in vhost_net.c is
simplified to use the new generic helper, removing the type check and
the direct dependency.

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

1 files changed, 1 insertions, 0 deletions

diff --git a/net/tap.c b/net/tap.c
index a33eb23212..acd77f816f 100644
--- a/net/tap.c
+++ b/net/tap.c
@@ -744,6 +744,7 @@ static void net_init_tap_one(const NetdevTapOptions *tap, NetClientState *peer,
         options.opaque = (void *)(uintptr_t)vhostfd;
         options.nvqs = 2;
         options.feature_bits = kernel_feature_bits;
+        options.get_acked_features = NULL;
 
         s->vhost_net = vhost_net_init(&options);
         if (!s->vhost_net) {