[PATCH v2 net-next 3/3] vhost/net: enable outer nw header offset support

[Kommula Shiva Shankar <kshankar@marvell.com>]

apprise vhost net about the virtio net header size.

Signed-off-by: Kommula Shiva Shankar <kshankar@marvell.com>
---
 drivers/vhost/net.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/drivers/vhost/net.c b/drivers/vhost/net.c
index 35ded4330431..8d055405746d 100644
--- a/drivers/vhost/net.c
+++ b/drivers/vhost/net.c
@@ -78,6 +78,7 @@ static const u64 vhost_net_features[VIRTIO_FEATURES_DWORDS] = {
 	(1ULL << VIRTIO_F_IN_ORDER),
 	VIRTIO_BIT(VIRTIO_NET_F_GUEST_UDP_TUNNEL_GSO) |
 	VIRTIO_BIT(VIRTIO_NET_F_HOST_UDP_TUNNEL_GSO),
+	VIRTIO_BIT(VIRTIO_NET_F_OUT_NET_HEADER),
 };
 
 enum {
@@ -1655,6 +1656,9 @@ static int vhost_net_set_features(struct vhost_net *n, const u64 *features)
 		  sizeof(struct virtio_net_hdr_mrg_rxbuf) :
 		  sizeof(struct virtio_net_hdr);
 
+	if (virtio_features_test_bit(features,
+				     VIRTIO_NET_F_OUT_NET_HEADER))
+		hdr_len = sizeof(struct virtio_net_hdr_v1_hash_tunnel_out_net_hdr);
 	if (virtio_features_test_bit(features,
 				     VIRTIO_NET_F_HOST_UDP_TUNNEL_GSO) ||
 	    virtio_features_test_bit(features,
-- 
2.48.1