From 6b88dd966b42e374dc783c397efc15f5c1458265 Mon Sep 17 00:00:00 2001
From: Arnaldo Carvalho de Melo <acme@redhat.com>
Date: Mon, 19 Mar 2007 22:29:03 -0300
Subject: [PATCH] [SK_BUFF] ipv6: Use skb_network_offset in some more places
So that we reduce the number of direct accesses to skb->data.
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
---
net/ipv6/netfilter/ip6_tables.c | 2 +-
net/ipv6/netfilter/nf_conntrack_reasm.c | 5 +++--
2 files changed, 4 insertions(+), 3 deletions(-)
diff --git a/net/ipv6/netfilter/ip6_tables.c b/net/ipv6/netfilter/ip6_tables.c
index caf9e375a0f11..b97aedce62aed 100644
--- a/net/ipv6/netfilter/ip6_tables.c
+++ b/net/ipv6/netfilter/ip6_tables.c
@@ -1448,7 +1448,7 @@ static void __exit ip6_tables_fini(void)
int ipv6_find_hdr(const struct sk_buff *skb, unsigned int *offset,
int target, unsigned short *fragoff)
{
- unsigned int start = (u8 *)(ipv6_hdr(skb) + 1) - skb->data;
+ unsigned int start = skb_network_offset(skb) + sizeof(struct ipv6hdr);
u8 nexthdr = ipv6_hdr(skb)->nexthdr;
unsigned int len = skb->len - start;
diff --git a/net/ipv6/netfilter/nf_conntrack_reasm.c b/net/ipv6/netfilter/nf_conntrack_reasm.c
index b7889ceef5560..721f02d7b7f6b 100644
--- a/net/ipv6/netfilter/nf_conntrack_reasm.c
+++ b/net/ipv6/netfilter/nf_conntrack_reasm.c
@@ -707,8 +707,9 @@ static int
find_prev_fhdr(struct sk_buff *skb, u8 *prevhdrp, int *prevhoff, int *fhoff)
{
u8 nexthdr = ipv6_hdr(skb)->nexthdr;
- u8 prev_nhoff = (u8 *)&ipv6_hdr(skb)->nexthdr - skb->data;
- int start = (u8 *)(ipv6_hdr(skb) + 1) - skb->data;
+ const int netoff = skb_network_offset(skb);
+ u8 prev_nhoff = netoff + offsetof(struct ipv6hdr, nexthdr);
+ int start = netoff + sizeof(struct ipv6hdr);
int len = skb->len - start;
u8 prevhdr = NEXTHDR_IPV6;
--
2.39.5