[IPSEC]: Set skb->data to payload in x->mode->output
This patch changes the calling convention so that on entry from
x->mode->output and before entry into x->type->output skb->data
will point to the payload instead of the IP header.
This is essentially a redistribution of skb_push/skb_pull calls
with the aim of minimising them on the common path of tunnel +
ESP.
It'll also let us use the same calling convention between IPv4
and IPv6 with the next patch.
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/ipv6/mip6.c b/net/ipv6/mip6.c
index 6475bac..0e7a60f 100644
--- a/net/ipv6/mip6.c
+++ b/net/ipv6/mip6.c
@@ -153,6 +153,7 @@
u8 nexthdr;
int len;
+ skb_push(skb, -skb_network_offset(skb));
iph = ipv6_hdr(skb);
iph->payload_len = htons(skb->len - sizeof(*iph));
@@ -367,6 +368,7 @@
struct rt2_hdr *rt2;
u8 nexthdr;
+ skb_push(skb, -skb_network_offset(skb));
iph = ipv6_hdr(skb);
iph->payload_len = htons(skb->len - sizeof(*iph));