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authorIlan Tayari <ilant@mellanox.com>2017-04-14 10:07:39 +0200
committerSteffen Klassert <steffen.klassert@secunet.com>2017-04-14 10:07:39 +0200
commitf1bd7d659ef0ba0f18c6f6afe7bbbd2410acffa0 (patch)
treeeb0c800ea60b7701158ad68bc566f514ac11f15d /net/ipv4/xfrm4_mode_tunnel.c
parentnet: Add a xfrm validate function to validate_xmit_skb (diff)
downloadlinux-dev-f1bd7d659ef0ba0f18c6f6afe7bbbd2410acffa0.tar.xz
linux-dev-f1bd7d659ef0ba0f18c6f6afe7bbbd2410acffa0.zip
xfrm: Add encapsulation header offsets while SKB is not encrypted
Both esp4 and esp6 used to assume that the SKB payload is encrypted and therefore the inner_network and inner_transport offsets are not relevant. When doing crypto offload in the NIC, this is no longer the case and the NIC driver needs these offsets so it can do TX TCP checksum offloading. This patch sets the inner_network and inner_transport members of the SKB, as well as encapsulation, to reflect the actual positions of these headers, and removes them only once encryption is done on the payload. Signed-off-by: Ilan Tayari <ilant@mellanox.com> Signed-off-by: Steffen Klassert <steffen.klassert@secunet.com>
Diffstat (limited to 'net/ipv4/xfrm4_mode_tunnel.c')
-rw-r--r--net/ipv4/xfrm4_mode_tunnel.c3
1 files changed, 3 insertions, 0 deletions
diff --git a/net/ipv4/xfrm4_mode_tunnel.c b/net/ipv4/xfrm4_mode_tunnel.c
index d3f2434fa0b8..e6265e2c274e 100644
--- a/net/ipv4/xfrm4_mode_tunnel.c
+++ b/net/ipv4/xfrm4_mode_tunnel.c
@@ -33,6 +33,9 @@ static int xfrm4_mode_tunnel_output(struct xfrm_state *x, struct sk_buff *skb)
struct iphdr *top_iph;
int flags;
+ skb_set_inner_network_header(skb, skb_network_offset(skb));
+ skb_set_inner_transport_header(skb, skb_transport_offset(skb));
+
skb_set_network_header(skb, -x->props.header_len);
skb->mac_header = skb->network_header +
offsetof(struct iphdr, protocol);