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[IPSEC]: Set skb->data to payload in x->mode->output

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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>
This commit is contained in:
Herbert Xu
2007-10-10 15:44:06 -07:00
committed by David S. Miller
parent bee0b40c06
commit 7b277b1a5f
16 changed files with 47 additions and 42 deletions
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1
net/ipv6/ah6.c
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@@ -236,6 +236,7 @@ static int ah6_output(struct xfrm_state *x, struct sk_buff *skb)
char hdrs[0];
} *tmp_ext;
skb_push(skb, -skb_network_offset(skb));
top_iph = ipv6_hdr(skb);
top_iph->payload_len = htons(skb->len - sizeof(*top_iph));