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authorIlpo Järvinen <ilpo.jarvinen@helsinki.fi>2008-10-01 02:48:31 -0700
committerDavid S. Miller <davem@davemloft.net>2008-10-01 02:48:31 -0700
commit93c8b90f01f0dc73891da4e84b26524b61d29d66 (patch)
treeec7fa47679cccf47716039f2c3898742a0881090 /net/ipv6/reassembly.c
parent2bcb4b0f111053d0e8fb4366f0708395d997e93a (diff)
downloadop-kernel-dev-93c8b90f01f0dc73891da4e84b26524b61d29d66.zip
op-kernel-dev-93c8b90f01f0dc73891da4e84b26524b61d29d66.tar.gz
ipv6: almost identical frag hashing funcs combined
$ diff-funcs ip6qhashfn reassembly.c netfilter/nf_conntrack_reasm.c --- reassembly.c:ip6qhashfn() +++ netfilter/nf_conntrack_reasm.c:ip6qhashfn() @@ -1,5 +1,5 @@ -static unsigned int ip6qhashfn(__be32 id, struct in6_addr *saddr, - struct in6_addr *daddr) +static unsigned int ip6qhashfn(__be32 id, const struct in6_addr *saddr, + const struct in6_addr *daddr) { u32 a, b, c; @@ -9,7 +9,7 @@ a += JHASH_GOLDEN_RATIO; b += JHASH_GOLDEN_RATIO; - c += ip6_frags.rnd; + c += nf_frags.rnd; __jhash_mix(a, b, c); a += (__force u32)saddr->s6_addr32[3]; And codiff xx.o.old xx.o.new: net/ipv6/netfilter/nf_conntrack_reasm.c: ip6qhashfn | -512 nf_hashfn | +6 nf_ct_frag6_gather | +36 3 functions changed, 42 bytes added, 512 bytes removed, diff: -470 net/ipv6/reassembly.c: ip6qhashfn | -512 ip6_hashfn | +7 ipv6_frag_rcv | +89 3 functions changed, 96 bytes added, 512 bytes removed, diff: -416 net/ipv6/reassembly.c: inet6_hash_frag | +510 1 function changed, 510 bytes added, diff: +510 Total: -376 Compile tested. Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@helsinki.fi> Acked-by: Arnaldo Carvalho de Melo <acme@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/ipv6/reassembly.c')
-rw-r--r--net/ipv6/reassembly.c11
1 files changed, 6 insertions, 5 deletions
diff --git a/net/ipv6/reassembly.c b/net/ipv6/reassembly.c
index 89184b5..2eeadfa 100644
--- a/net/ipv6/reassembly.c
+++ b/net/ipv6/reassembly.c
@@ -99,8 +99,8 @@ static int ip6_frag_reasm(struct frag_queue *fq, struct sk_buff *prev,
* callers should be careful not to use the hash value outside the ipfrag_lock
* as doing so could race with ipfrag_hash_rnd being recalculated.
*/
-static unsigned int ip6qhashfn(__be32 id, struct in6_addr *saddr,
- struct in6_addr *daddr)
+unsigned int inet6_hash_frag(__be32 id, const struct in6_addr *saddr,
+ const struct in6_addr *daddr, u32 rnd)
{
u32 a, b, c;
@@ -110,7 +110,7 @@ static unsigned int ip6qhashfn(__be32 id, struct in6_addr *saddr,
a += JHASH_GOLDEN_RATIO;
b += JHASH_GOLDEN_RATIO;
- c += ip6_frags.rnd;
+ c += rnd;
__jhash_mix(a, b, c);
a += (__force u32)saddr->s6_addr32[3];
@@ -125,13 +125,14 @@ static unsigned int ip6qhashfn(__be32 id, struct in6_addr *saddr,
return c & (INETFRAGS_HASHSZ - 1);
}
+EXPORT_SYMBOL_GPL(inet6_hash_frag);
static unsigned int ip6_hashfn(struct inet_frag_queue *q)
{
struct frag_queue *fq;
fq = container_of(q, struct frag_queue, q);
- return ip6qhashfn(fq->id, &fq->saddr, &fq->daddr);
+ return inet6_hash_frag(fq->id, &fq->saddr, &fq->daddr, ip6_frags.rnd);
}
int ip6_frag_match(struct inet_frag_queue *q, void *a)
@@ -247,7 +248,7 @@ fq_find(struct net *net, __be32 id, struct in6_addr *src, struct in6_addr *dst,
arg.dst = dst;
read_lock(&ip6_frags.lock);
- hash = ip6qhashfn(id, src, dst);
+ hash = inet6_hash_frag(id, src, dst, ip6_frags.rnd);
q = inet_frag_find(&net->ipv6.frags, &ip6_frags, &arg, hash);
if (q == NULL)
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