path: root/net/ipv4/fou.c
diff options
authorJarno Rajahalme <jarno@ovn.org>2016-05-03 16:10:21 -0700
committerDavid S. Miller <davem@davemloft.net>2016-05-06 18:25:26 -0400
commit229740c63169462a838a8b8e16391ed000934631 (patch)
tree3ca6aa48885be0f37d0b7f4832936b183c630a80 /net/ipv4/fou.c
parentudp_tunnel: Remove redundant udp_tunnel_gro_complete(). (diff)
udp_offload: Set encapsulation before inner completes.
UDP tunnel segmentation code relies on the inner offsets being set for an UDP tunnel GSO packet, but the inner *_complete() functions will set the inner offsets only if 'encapsulation' is set before calling them. Currently, udp_gro_complete() sets 'encapsulation' only after the inner *_complete() functions are done. This causes the inner offsets having invalid values after udp_gro_complete() returns, which in turn will make it impossible to properly segment the packet in case it needs to be forwarded, which would be visible to the user either as invalid packets being sent or as packet loss. This patch fixes this by setting skb's 'encapsulation' in udp_gro_complete() before calling into the inner complete functions, and by making each possible UDP tunnel gro_complete() callback set the inner_mac_header to the beginning of the tunnel payload. Signed-off-by: Jarno Rajahalme <jarno@ovn.org> Reviewed-by: Alexander Duyck <aduyck@mirantis.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/ipv4/fou.c')
1 files changed, 4 insertions, 0 deletions
diff --git a/net/ipv4/fou.c b/net/ipv4/fou.c
index 305d9ac68bd9..a6962ccad98a 100644
--- a/net/ipv4/fou.c
+++ b/net/ipv4/fou.c
@@ -236,6 +236,8 @@ static int fou_gro_complete(struct sk_buff *skb, int nhoff,
err = ops->callbacks.gro_complete(skb, nhoff);
+ skb_set_inner_mac_header(skb, nhoff);
@@ -412,6 +414,8 @@ static int gue_gro_complete(struct sk_buff *skb, int nhoff,
err = ops->callbacks.gro_complete(skb, nhoff + guehlen);
+ skb_set_inner_mac_header(skb, nhoff + guehlen);
return err;