diff options
| author | Pravin B Shelar <pshelar@nicira.com> | 2013-03-07 17:21:51 +0400 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2013-03-10 01:09:17 +0400 |
| commit | 731362674580cb0c696cd1b1a03d8461a10cf90a (patch) | |
| tree | 29c6e106fbe52b31cacf454d4adc50750694a7b1 /net/ipv4/af_inet.c | |
| parent | aefbd2b3c2a9c657605e4337f9919d6c6273e8e6 (diff) | |
| download | linux-731362674580cb0c696cd1b1a03d8461a10cf90a.tar.xz | |
tunneling: Add generic Tunnel segmentation.
Adds generic tunneling offloading support for IPv4-UDP based
tunnels.
GSO type is added to request this offload for a skb.
netdev feature NETIF_F_UDP_TUNNEL is added for hardware offloaded
udp-tunnel support. Currently no device supports this feature,
software offload is used.
This can be used by tunneling protocols like VXLAN.
CC: Jesse Gross <jesse@nicira.com>
Signed-off-by: Pravin B Shelar <pshelar@nicira.com>
Acked-by: Stephen Hemminger <stephen@networkplumber.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/ipv4/af_inet.c')
| -rw-r--r-- | net/ipv4/af_inet.c | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/net/ipv4/af_inet.c b/net/ipv4/af_inet.c index dc3f677360a5..9e5882caf8a7 100644 --- a/net/ipv4/af_inet.c +++ b/net/ipv4/af_inet.c @@ -1283,6 +1283,7 @@ static struct sk_buff *inet_gso_segment(struct sk_buff *skb, int ihl; int id; unsigned int offset = 0; + bool tunnel; if (unlikely(skb_shinfo(skb)->gso_type & ~(SKB_GSO_TCPV4 | @@ -1290,6 +1291,7 @@ static struct sk_buff *inet_gso_segment(struct sk_buff *skb, SKB_GSO_DODGY | SKB_GSO_TCP_ECN | SKB_GSO_GRE | + SKB_GSO_UDP_TUNNEL | 0))) goto out; @@ -1304,6 +1306,8 @@ static struct sk_buff *inet_gso_segment(struct sk_buff *skb, if (unlikely(!pskb_may_pull(skb, ihl))) goto out; + tunnel = !!skb->encapsulation; + __skb_pull(skb, ihl); skb_reset_transport_header(skb); iph = ip_hdr(skb); @@ -1323,7 +1327,7 @@ static struct sk_buff *inet_gso_segment(struct sk_buff *skb, skb = segs; do { iph = ip_hdr(skb); - if (proto == IPPROTO_UDP) { + if (!tunnel && proto == IPPROTO_UDP) { iph->id = htons(id); iph->frag_off = htons(offset >> 3); if (skb->next != NULL) |