[Qemu-devel] [RFC] vhost-user: don't ignore CTRL_VLAN feature

[Tiwei Bie <tiwei.bie@intel.com>]

The VIRTIO_NET_F_CTRL_VLAN feature requires the support of
vhost-user backend. But it will be advertised to guest driver
as long as it's enabled by users in QEMU, while it's not
supported by vhost-user backend. This patch fixes this issue.

Fixes: 72018d1e1917 ("vhost-user: ignore qemu-only features")
Cc: qemu-stable@nongnu.org

Signed-off-by: Tiwei Bie <tiwei.bie@intel.com>
---
It's not clear in the spec that, whether vlan filtering is
also best-effort:
https://github.com/oasis-tcs/virtio-spec/blob/37057052e7/content.tex#L3372

 hw/net/vhost_net.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/hw/net/vhost_net.c b/hw/net/vhost_net.c
index a6b719035c..1444fc9230 100644
--- a/hw/net/vhost_net.c
+++ b/hw/net/vhost_net.c
@@ -75,6 +75,8 @@ static const int user_feature_bits[] = {
     VIRTIO_NET_F_MTU,
     VIRTIO_F_IOMMU_PLATFORM,
 
+    VIRTIO_NET_F_CTRL_VLAN,
+
     /* This bit implies RARP isn't sent by QEMU out of band */
     VIRTIO_NET_F_GUEST_ANNOUNCE,
 
-- 
2.17.1