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net: Add GSO support for UDP tunnels with checksum

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Added a new netif feature for GSO_UDP_TUNNEL_CSUM. This indicates
that a device is capable of computing the UDP checksum in the
encapsulating header of a UDP tunnel.

Signed-off-by: Tom Herbert <[email protected]>
Signed-off-by: David S. Miller <[email protected]>
This commit is contained in:
Tom Herbert 2014-06-04 17:20:16 -07:00 • committed by David S. Miller
commit 0f4f4ffa7b
8 changed files with 31 additions and 23 deletions
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1
net/ipv6/ip6_offload.c
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@ -100,6 +100,7 @@ static struct sk_buff *ipv6_gso_segment(struct sk_buff *skb,
SKB_GSO_IPIP |
SKB_GSO_SIT |
SKB_GSO_UDP_TUNNEL |
SKB_GSO_UDP_TUNNEL_CSUM |
SKB_GSO_MPLS |
SKB_GSO_TCPV6 |
0)))

4
net/ipv6/udp_offload.c
View file

@ -63,6 +63,7 @@ static struct sk_buff *udp6_ufo_fragment(struct sk_buff *skb,
if (unlikely(type & ~(SKB_GSO_UDP |
SKB_GSO_DODGY |
SKB_GSO_UDP_TUNNEL |
SKB_GSO_UDP_TUNNEL_CSUM |
SKB_GSO_GRE |
SKB_GSO_IPIP |
SKB_GSO_SIT |
@ -76,7 +77,8 @@ static struct sk_buff *udp6_ufo_fragment(struct sk_buff *skb,
goto out;
}
if (skb->encapsulation && skb_shinfo(skb)->gso_type & SKB_GSO_UDP_TUNNEL)
if (skb->encapsulation && skb_shinfo(skb)->gso_type &
(SKB_GSO_UDP_TUNNEL|SKB_GSO_UDP_TUNNEL_CSUM))
segs = skb_udp_tunnel_segment(skb, features);
else {
/* Do software UFO. Complete and fill in the UDP checksum as HW cannot