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authorPravin B Shelar <pshelar@nicira.com>2013-03-07 17:21:51 +0400
committerDavid S. Miller <davem@davemloft.net>2013-03-10 01:09:17 +0400
commit731362674580cb0c696cd1b1a03d8461a10cf90a (patch)
tree29c6e106fbe52b31cacf454d4adc50750694a7b1 /net/ipv6/udp_offload.c
parentaefbd2b3c2a9c657605e4337f9919d6c6273e8e6 (diff)
downloadlinux-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/ipv6/udp_offload.c')
-rw-r--r--net/ipv6/udp_offload.c8
1 files changed, 7 insertions, 1 deletions
diff --git a/net/ipv6/udp_offload.c b/net/ipv6/udp_offload.c
index cf05cf073c51..3bb3a891a424 100644
--- a/net/ipv6/udp_offload.c
+++ b/net/ipv6/udp_offload.c
@@ -21,6 +21,10 @@ static int udp6_ufo_send_check(struct sk_buff *skb)
const struct ipv6hdr *ipv6h;
struct udphdr *uh;
+ /* UDP Tunnel offload on ipv6 is not yet supported. */
+ if (skb->encapsulation)
+ return -EINVAL;
+
if (!pskb_may_pull(skb, sizeof(*uh)))
return -EINVAL;
@@ -56,7 +60,9 @@ static struct sk_buff *udp6_ufo_fragment(struct sk_buff *skb,
/* Packet is from an untrusted source, reset gso_segs. */
int type = skb_shinfo(skb)->gso_type;
- if (unlikely(type & ~(SKB_GSO_UDP | SKB_GSO_DODGY |
+ if (unlikely(type & ~(SKB_GSO_UDP |
+ SKB_GSO_DODGY |
+ SKB_GSO_UDP_TUNNEL |
SKB_GSO_GRE) ||
!(type & (SKB_GSO_UDP))))
goto out;