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authorSteffen Klassert <steffen.klassert@secunet.com>2017-02-15 11:40:00 +0300
committerSteffen Klassert <steffen.klassert@secunet.com>2017-02-15 13:04:11 +0300
commit7785bba299a8dc8fe8390a0183dad3cafb3f1d80 (patch)
tree33c29b31f0e66433b340998aa822bebe322aa116 /net/ipv4/xfrm4_mode_transport.c
parent54ef207ac8f7a17d677082157a29f4df8499dc81 (diff)
downloadlinux-7785bba299a8dc8fe8390a0183dad3cafb3f1d80.tar.xz
esp: Add a software GRO codepath
This patch adds GRO ifrastructure and callbacks for ESP on ipv4 and ipv6. In case the GRO layer detects an ESP packet, the esp{4,6}_gro_receive() function does a xfrm state lookup and calls the xfrm input layer if it finds a matching state. The packet will be decapsulated and reinjected it into layer 2. Signed-off-by: Steffen Klassert <steffen.klassert@secunet.com>
Diffstat (limited to 'net/ipv4/xfrm4_mode_transport.c')
-rw-r--r--net/ipv4/xfrm4_mode_transport.c4
1 files changed, 3 insertions, 1 deletions
diff --git a/net/ipv4/xfrm4_mode_transport.c b/net/ipv4/xfrm4_mode_transport.c
index fd840c7d75ea..4acc0508c5eb 100644
--- a/net/ipv4/xfrm4_mode_transport.c
+++ b/net/ipv4/xfrm4_mode_transport.c
@@ -43,6 +43,7 @@ static int xfrm4_transport_output(struct xfrm_state *x, struct sk_buff *skb)
static int xfrm4_transport_input(struct xfrm_state *x, struct sk_buff *skb)
{
int ihl = skb->data - skb_transport_header(skb);
+ struct xfrm_offload *xo = xfrm_offload(skb);
if (skb->transport_header != skb->network_header) {
memmove(skb_transport_header(skb),
@@ -50,7 +51,8 @@ static int xfrm4_transport_input(struct xfrm_state *x, struct sk_buff *skb)
skb->network_header = skb->transport_header;
}
ip_hdr(skb)->tot_len = htons(skb->len + ihl);
- skb_reset_transport_header(skb);
+ if (!xo || !(xo->flags & XFRM_GRO))
+ skb_reset_transport_header(skb);
return 0;
}