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[NETFILTER]: nf_conntrack: optimize __nf_conntrack_find()

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Ignoring specific entries in __nf_conntrack_find() is only needed by NAT
for nf_conntrack_tuple_taken(). Remove it from __nf_conntrack_find()
and make nf_conntrack_tuple_taken() search the hash itself.

Saves 54 bytes of text in the hotpath on x86_64:

  __nf_conntrack_find      |  -54 # 321 -> 267, # inlines: 3 -> 2, size inlines: 181 -> 127
  nf_conntrack_tuple_taken | +305 # 15 -> 320, lexblocks: 0 -> 3, # inlines: 0 -> 3, size inlines: 0 -> 181
  nf_conntrack_find_get    |   -2 # 90 -> 88
 3 functions changed, 305 bytes added, 56 bytes removed, diff: +249

Signed-off-by: Patrick McHardy <kaber@trash.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Patrick McHardy
2008-01-31 04:39:23 -08:00
committed by David S. Miller
parent f8ba1affa1
commit ba419aff2c
4 changed files with 20 additions and 13 deletions
Download Patch File Download Diff File Expand all files Collapse all files

3
include/net/netfilter/nf_conntrack.h
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@@ -178,8 +178,7 @@ extern void nf_ct_free_hashtable(struct hlist_head *hash, int vmalloced,
unsigned int size);
extern struct nf_conntrack_tuple_hash *
__nf_conntrack_find(const struct nf_conntrack_tuple *tuple,
const struct nf_conn *ignored_conntrack);
__nf_conntrack_find(const struct nf_conntrack_tuple *tuple);
extern void nf_conntrack_hash_insert(struct nf_conn *ct);