Vhost net need to know the exact virtio net hdr size to be able
to copy such header correctly. Teach it about the newly defined
UDP tunnel-related option and update the hdr size computation
accordingly.
Acked-by: Jason Wang <jasowang@xxxxxxxxxx>
Signed-off-by: Paolo Abeni <pabeni@xxxxxxxxxx>
---
v3 -> v4:
- rebased
---
drivers/vhost/net.c | 8 ++++++++
1 file changed, 8 insertions(+)
diff --git a/drivers/vhost/net.c b/drivers/vhost/net.c
index 4aa2930382ad..bfb774c273ea 100644
--- a/drivers/vhost/net.c
+++ b/drivers/vhost/net.c
@@ -75,6 +75,8 @@ static const u64 vhost_net_features[VIRTIO_FEATURES_DWORDS] = {
(1ULL << VIRTIO_NET_F_MRG_RXBUF) |
(1ULL << VIRTIO_F_ACCESS_PLATFORM) |
(1ULL << VIRTIO_F_RING_RESET),
+ VIRTIO_BIT(VIRTIO_NET_F_GUEST_UDP_TUNNEL_GSO) |
+ VIRTIO_BIT(VIRTIO_NET_F_HOST_UDP_TUNNEL_GSO),
};
enum {
@@ -1616,6 +1618,12 @@ 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_HOST_UDP_TUNNEL_GSO) ||
+ virtio_features_test_bit(features,
+ VIRTIO_NET_F_GUEST_UDP_TUNNEL_GSO))
+ hdr_len = sizeof(struct virtio_net_hdr_v1_hash_tunnel);
+
if (virtio_features_test_bit(features, VHOST_NET_F_VIRTIO_NET_HDR)) {
/* vhost provides vnet_hdr */
vhost_hlen = hdr_len;
--
2.49.0
