[PATCH v3 5/6] linux/virtio_net.h: Support USO offload in vnet header.

[Andrew Melnychenko]

Now, it's possible to convert USO vnet packets from/to skb.
Added support for GSO_UDP_L4 offload.

Signed-off-by: Andrew Melnychenko <and...@daynix.com>
---
 include/linux/virtio_net.h | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/include/linux/virtio_net.h b/include/linux/virtio_net.h
index a960de68ac69..bdf8de2cdd93 100644
--- a/include/linux/virtio_net.h
+++ b/include/linux/virtio_net.h
@@ -15,6 +15,7 @@ static inline bool virtio_net_hdr_match_proto(__be16 
protocol, __u8 gso_type)
        case VIRTIO_NET_HDR_GSO_TCPV6:
                return protocol == cpu_to_be16(ETH_P_IPV6);
        case VIRTIO_NET_HDR_GSO_UDP:
+       case VIRTIO_NET_HDR_GSO_UDP_L4:
                return protocol == cpu_to_be16(ETH_P_IP) ||
                       protocol == cpu_to_be16(ETH_P_IPV6);
        default:
@@ -31,6 +32,7 @@ static inline int virtio_net_hdr_set_proto(struct sk_buff 
*skb,
        switch (hdr->gso_type & ~VIRTIO_NET_HDR_GSO_ECN) {
        case VIRTIO_NET_HDR_GSO_TCPV4:
        case VIRTIO_NET_HDR_GSO_UDP:
+       case VIRTIO_NET_HDR_GSO_UDP_L4:
                skb->protocol = cpu_to_be16(ETH_P_IP);
                break;
        case VIRTIO_NET_HDR_GSO_TCPV6:
@@ -69,6 +71,11 @@ static inline int virtio_net_hdr_to_skb(struct sk_buff *skb,
                        ip_proto = IPPROTO_UDP;
                        thlen = sizeof(struct udphdr);
                        break;
+               case VIRTIO_NET_HDR_GSO_UDP_L4:
+                       gso_type = SKB_GSO_UDP_L4;
+                       ip_proto = IPPROTO_UDP;
+                       thlen = sizeof(struct udphdr);
+                       break;
                default:
                        return -EINVAL;
                }
@@ -182,6 +189,8 @@ static inline int virtio_net_hdr_from_skb(const struct 
sk_buff *skb,
                        hdr->gso_type = VIRTIO_NET_HDR_GSO_TCPV4;
                else if (sinfo->gso_type & SKB_GSO_TCPV6)
                        hdr->gso_type = VIRTIO_NET_HDR_GSO_TCPV6;
+               else if (sinfo->gso_type & SKB_GSO_UDP_L4)
+                       hdr->gso_type = VIRTIO_NET_HDR_GSO_UDP_L4;
                else
                        return -EINVAL;
                if (sinfo->gso_type & SKB_GSO_TCP_ECN)
-- 
2.37.2

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