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[IPV6]: Only set nfheader_len for top xfrm dst

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We only need to set nfheader_len in the top xfrm dst.  This is because
we only ever read the nfheader_len from the top xfrm dst.

It is also easier to count nfheader_len as part of header_len which
then lets us remove the ugly wrapper functions for incrementing and
decrementing header lengths in xfrm6_policy.c.

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 2007-11-13 21:32:26 -08:00 committed by David S. Miller
parent b24b8a247f
commit 0148894223
2 changed files with 6 additions and 23 deletions
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3
net/ipv6/ip6_output.c
View File

@ -1098,7 +1098,8 @@ int ip6_append_data(struct sock *sk, int getfrag(void *from, char *to,
inet->cork.length = 0;
sk->sk_sndmsg_page = NULL;
sk->sk_sndmsg_off = 0;
exthdrlen = rt->u.dst.header_len + (opt ? opt->opt_flen : 0);
exthdrlen = rt->u.dst.header_len + (opt ? opt->opt_flen : 0) -
rt->u.dst.nfheader_len;
length += exthdrlen;
transhdrlen += exthdrlen;
} else {

26
net/ipv6/xfrm6_policy.c
View File

@ -102,24 +102,6 @@ __xfrm6_bundle_addr_local(struct xfrm_state *x, struct in6_addr *addr)
(struct in6_addr*)&x->props.saddr;
}
static inline void
__xfrm6_bundle_len_inc(int *len, int *nflen, struct xfrm_state *x)
{
if (x->type->flags & XFRM_TYPE_NON_FRAGMENT)
*nflen += x->props.header_len;
else
*len += x->props.header_len;
}
static inline void
__xfrm6_bundle_len_dec(int *len, int *nflen, struct xfrm_state *x)
{
if (x->type->flags & XFRM_TYPE_NON_FRAGMENT)
*nflen -= x->props.header_len;
else
*len -= x->props.header_len;
}
/* Allocate chain of dst_entry's, attach known xfrm's, calculate
* all the metrics... Shortly, bundle a bundle.
*/
@ -142,7 +124,6 @@ __xfrm6_bundle_create(struct xfrm_policy *policy, struct xfrm_state **xfrm, int
int i;
int err = 0;
int header_len = 0;
int nfheader_len = 0;
int trailer_len = 0;
dst = dst_prev = NULL;
@ -175,7 +156,9 @@ __xfrm6_bundle_create(struct xfrm_policy *policy, struct xfrm_state **xfrm, int
dst1->next = dst_prev;
dst_prev = dst1;
__xfrm6_bundle_len_inc(&header_len, &nfheader_len, xfrm[i]);
if (xfrm[i]->type->flags & XFRM_TYPE_NON_FRAGMENT)
dst->nfheader_len += xfrm[i]->props.header_len;
header_len += xfrm[i]->props.header_len;
trailer_len += xfrm[i]->props.trailer_len;
if (xfrm[i]->props.mode != XFRM_MODE_TRANSPORT) {
@ -223,7 +206,6 @@ __xfrm6_bundle_create(struct xfrm_policy *policy, struct xfrm_state **xfrm, int
dst_prev->flags |= DST_HOST;
dst_prev->lastuse = jiffies;
dst_prev->header_len = header_len;
dst_prev->nfheader_len = nfheader_len;
dst_prev->trailer_len = trailer_len;
memcpy(&dst_prev->metrics, &x->route->metrics, sizeof(dst_prev->metrics));
@ -242,7 +224,7 @@ __xfrm6_bundle_create(struct xfrm_policy *policy, struct xfrm_state **xfrm, int
x->u.rt6.rt6i_src = rt0->rt6i_src;
x->u.rt6.rt6i_idev = rt0->rt6i_idev;
in6_dev_hold(rt0->rt6i_idev);
__xfrm6_bundle_len_dec(&header_len, &nfheader_len, x->u.dst.xfrm);
header_len -= x->u.dst.xfrm->props.header_len;
trailer_len -= x->u.dst.xfrm->props.trailer_len;
}