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[SK_BUFF]: Introduce skb_reset_transport_header(skb)

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For the common, open coded 'skb->h.raw = skb->data' operation, so that we can
later turn skb->h.raw into a offset, reducing the size of struct sk_buff in
64bit land while possibly keeping it as a pointer on 32bit.

This one touches just the most simple cases:

skb->h.raw = skb->data;
skb->h.raw = {skb_push|[__]skb_pull}()

The next ones will handle the slightly more "complex" cases.

Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Arnaldo Carvalho de Melo
2007-03-13 13:06:52 -03:00
committed by David S. Miller
parent 0660e03f6b
commit badff6d01a
49 changed files with 82 additions and 73 deletions
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8
net/ipv6/ip6_output.c
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@@ -654,7 +654,7 @@ static int ip6_fragment(struct sk_buff *skb, int (*output)(struct sk_buff *))
* before previous one went down. */
if (frag) {
frag->ip_summed = CHECKSUM_NONE;
frag->h.raw = frag->data;
skb_reset_transport_header(frag);
fh = (struct frag_hdr*)__skb_push(frag, sizeof(struct frag_hdr));
__skb_push(frag, hlen);
skb_reset_network_header(frag);
@@ -747,8 +747,8 @@ slow_path:
skb_reserve(frag, LL_RESERVED_SPACE(rt->u.dst.dev));
skb_put(frag, len + hlen + sizeof(struct frag_hdr));
skb_reset_network_header(frag);
fh = (struct frag_hdr*)(frag->data + hlen);
frag->h.raw = frag->data + hlen + sizeof(struct frag_hdr);
fh = (struct frag_hdr *)(skb_network_header(frag) + hlen);
frag->h.raw = frag->nh.raw + hlen + sizeof(struct frag_hdr);
/*
* Charge the memory for the fragment to any owner
@@ -991,7 +991,7 @@ static inline int ip6_ufo_append_data(struct sock *sk,
skb_reset_network_header(skb);
/* initialize protocol header pointer */
skb->h.raw = skb->data + fragheaderlen;
skb->h.raw = skb->nh.raw + fragheaderlen;
skb->ip_summed = CHECKSUM_PARTIAL;
skb->csum = 0;