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[NET]: Replace skb_pull/skb_postpull_rcsum with skb_pull_rcsum

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We're now starting to have quite a number of places that do skb_pull
followed immediately by an skb_postpull_rcsum.  We can merge these two
operations into one function with skb_pull_rcsum.  This makes sense
since most pull operations on receive skb's need to update the
checksum.

I've decided to make this out-of-line since it is fairly big and the
fast path where hardware checksums are enabled need to call
csum_partial anyway.

Since this is a brand new function we get to add an extra check on the
len argument.  As it is most callers of skb_pull ignore its return
value which essentially means that there is no check on the len
argument.

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
2006-03-20 22:43:56 -08:00
committed by David S. Miller
parent ecba320f2e
commit cbb042f9e1
7 changed files with 32 additions and 15 deletions
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6
net/bridge/br_netfilter.c
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@@ -425,8 +425,7 @@ static unsigned int br_nf_pre_routing(unsigned int hook, struct sk_buff **pskb,
if (skb->protocol == __constant_htons(ETH_P_8021Q)) {
u8 *vhdr = skb->data;
skb_pull(skb, VLAN_HLEN);
skb_postpull_rcsum(skb, vhdr, VLAN_HLEN);
skb_pull_rcsum(skb, VLAN_HLEN);
skb->nh.raw += VLAN_HLEN;
}
return br_nf_pre_routing_ipv6(hook, skb, in, out, okfn);
@@ -444,8 +443,7 @@ static unsigned int br_nf_pre_routing(unsigned int hook, struct sk_buff **pskb,
if (skb->protocol == __constant_htons(ETH_P_8021Q)) {
u8 *vhdr = skb->data;
skb_pull(skb, VLAN_HLEN);
skb_postpull_rcsum(skb, vhdr, VLAN_HLEN);
skb_pull_rcsum(skb, VLAN_HLEN);
skb->nh.raw += VLAN_HLEN;
}