virtio-net: enable TSO/checksum offloads for Q-in-Q vlans
authorVlad Yasevich <vyasevich@gmail.com>
Tue, 23 May 2017 17:38:43 +0000 (13:38 -0400)
committerDavid S. Miller <davem@davemloft.net>
Wed, 24 May 2017 20:27:14 +0000 (16:27 -0400)
Since virtio does not provide it's own ndo_features_check handler,
TSO, and now checksum offload, are disabled for stacked vlans.
Re-enable the support and let the host take care of it.  This
restores/improves Guest-to-Guest performance over Q-in-Q vlans.

Acked-by: Jason Wang <jasowang@redhat.com>
Acked-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Vladislav Yasevich <vyasevic@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
drivers/net/virtio_net.c

index 9320d96a1632bbebe8bd1d4a04059e0df631ac19..3e9246cc49c3784ebc045868a53318d35bf01075 100644 (file)
@@ -1989,6 +1989,7 @@ static const struct net_device_ops virtnet_netdev = {
        .ndo_poll_controller = virtnet_netpoll,
 #endif
        .ndo_xdp                = virtnet_xdp,
+       .ndo_features_check     = passthru_features_check,
 };
 
 static void virtnet_config_changed_work(struct work_struct *work)