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[NETFILTER]: nf_nat: use hlists for bysource hash

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Signed-off-by: Patrick McHardy <kaber@trash.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Patrick McHardy 2007-07-07 22:30:27 -07:00 committed by David S. Miller
parent ac565e5fc1
commit 53aba5979e
2 changed files with 12 additions and 11 deletions
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2
include/net/netfilter/nf_nat.h
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@ -66,7 +66,7 @@ struct nf_conn;
/* The structure embedded in the conntrack structure. */
struct nf_conn_nat
{
struct list_head bysource;
struct hlist_node bysource;
struct nf_nat_seq seq[IP_CT_DIR_MAX];
struct nf_conn *ct;
union nf_conntrack_nat_help help;

21
net/ipv4/netfilter/nf_nat_core.c
View File

@ -12,7 +12,6 @@
#include <linux/types.h>
#include <linux/timer.h>
#include <linux/skbuff.h>
#include <linux/vmalloc.h>
#include <net/checksum.h>
#include <net/icmp.h>
#include <net/ip.h>
@ -44,8 +43,9 @@ static struct nf_conntrack_l3proto *l3proto = NULL;
/* Calculated at init based on memory size */
static unsigned int nf_nat_htable_size;
static int nf_nat_vmalloced;
static struct list_head *bysource;
static struct hlist_head *bysource;
#define MAX_IP_NAT_PROTO 256
static struct nf_nat_protocol *nf_nat_protos[MAX_IP_NAT_PROTO];
@ -153,9 +153,10 @@ find_appropriate_src(const struct nf_conntrack_tuple *tuple,
unsigned int h = hash_by_src(tuple);
struct nf_conn_nat *nat;
struct nf_conn *ct;
struct hlist_node *n;
read_lock_bh(&nf_nat_lock);
list_for_each_entry(nat, &bysource[h], bysource) {
hlist_for_each_entry(nat, n, &bysource[h], bysource) {
ct = nat->ct;
if (same_src(ct, tuple)) {
/* Copy source part from reply tuple. */
@ -336,7 +337,7 @@ nf_nat_setup_info(struct nf_conn *ct,
/* nf_conntrack_alter_reply might re-allocate exntension aera */
nat = nfct_nat(ct);
nat->ct = ct;
list_add(&nat->bysource, &bysource[srchash]);
hlist_add_head(&nat->bysource, &bysource[srchash]);
write_unlock_bh(&nf_nat_lock);
}
@ -600,7 +601,7 @@ static void nf_nat_cleanup_conntrack(struct nf_conn *ct)
NF_CT_ASSERT(nat->ct->status & IPS_NAT_DONE_MASK);
write_lock_bh(&nf_nat_lock);
list_del(&nat->bysource);
hlist_del(&nat->bysource);
nat->ct = NULL;
write_unlock_bh(&nf_nat_lock);
}
@ -618,7 +619,7 @@ static void nf_nat_move_storage(struct nf_conn *conntrack, void *old)
srchash = hash_by_src(&ct->tuplehash[IP_CT_DIR_ORIGINAL].tuple);
write_lock_bh(&nf_nat_lock);
list_replace(&old_nat->bysource, &new_nat->bysource);
hlist_replace_rcu(&old_nat->bysource, &new_nat->bysource);
new_nat->ct = ct;
write_unlock_bh(&nf_nat_lock);
}
@ -646,8 +647,8 @@ static int __init nf_nat_init(void)
/* Leave them the same for the moment. */
nf_nat_htable_size = nf_conntrack_htable_size;
/* One vmalloc for both hash tables */
bysource = vmalloc(sizeof(struct list_head) * nf_nat_htable_size);
bysource = nf_ct_alloc_hashtable(&nf_nat_htable_size,
&nf_nat_vmalloced);
if (!bysource) {
ret = -ENOMEM;
goto cleanup_extend;
@ -663,7 +664,7 @@ static int __init nf_nat_init(void)
write_unlock_bh(&nf_nat_lock);
for (i = 0; i < nf_nat_htable_size; i++) {
INIT_LIST_HEAD(&bysource[i]);
INIT_HLIST_HEAD(&bysource[i]);
}
/* Initialize fake conntrack so that NAT will skip it */
@ -693,7 +694,7 @@ static void __exit nf_nat_cleanup(void)
{
nf_ct_iterate_cleanup(&clean_nat, NULL);
synchronize_rcu();
vfree(bysource);
nf_ct_free_hashtable(bysource, nf_nat_vmalloced, nf_nat_htable_size);
nf_ct_l3proto_put(l3proto);
nf_ct_extend_unregister(&nat_extend);
}