vhost: support Generic Segmentation Offload

In virtio, Generic Segmentation Offload (GSO) is the feature for the
backend, which means the backend can receive packets with any GSO
type.

Virtio-net enables the GSO feature by default, and vhost-net supports it.
To make live migration from vhost-net to vhost-user possible, this patch
enables GSO for vhost-user.

Signed-off-by: Jiayu Hu <jiayu.hu@intel.com>
Tested-by: Lei Yao <lei.a.yao@intel.com>
Acked-by: Yuanhan Liu <yliu@fridaylinux.org>

diff --git a/lib/librte_vhost/vhost.h b/lib/librte_vhost/vhost.h
index b8682dd..27989e8 100644 (file)
--- a/lib/librte_vhost/vhost.h
+++ b/lib/librte_vhost/vhost.h
@@ -175,6 +175,7 @@ struct vhost_msg {
                                (1ULL << VIRTIO_F_VERSION_1)   | \
                                (1ULL << VHOST_F_LOG_ALL)      | \
                                (1ULL << VHOST_USER_F_PROTOCOL_FEATURES) | \
+                               (1ULL << VIRTIO_NET_F_GSO) | \
                                (1ULL << VIRTIO_NET_F_HOST_TSO4) | \
                                (1ULL << VIRTIO_NET_F_HOST_TSO6) | \
                                (1ULL << VIRTIO_NET_F_CSUM)    | \