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authorDavid S. Miller <davem@davemloft.net>2012-02-24 17:41:57 -0500
committerDavid S. Miller <davem@davemloft.net>2012-02-24 17:41:57 -0500
commite807e566e99b644d8d248ba9393a0ba3f1012fdc (patch)
treeea705f137653dc55dc9804d76f59536790aa35dd /net
parentbff528578fc3c4a14227b052a313109b5ffb73da (diff)
parent7d367e06688dc7a2cc98c2ace04e1296e1d987e2 (diff)
downloadlinux-linaro-stable-e807e566e99b644d8d248ba9393a0ba3f1012fdc.tar.gz
Merge branch 'master' of git://1984.lsi.us.es/net
Diffstat (limited to 'net')
-rw-r--r--net/netfilter/nf_conntrack_core.c38
-rw-r--r--net/netfilter/nf_conntrack_netlink.c11
2 files changed, 38 insertions, 11 deletions
diff --git a/net/netfilter/nf_conntrack_core.c b/net/netfilter/nf_conntrack_core.c
index 76613f5a55c0..ed86a3be678e 100644
--- a/net/netfilter/nf_conntrack_core.c
+++ b/net/netfilter/nf_conntrack_core.c
@@ -404,19 +404,49 @@ static void __nf_conntrack_hash_insert(struct nf_conn *ct,
&net->ct.hash[repl_hash]);
}
-void nf_conntrack_hash_insert(struct nf_conn *ct)
+int
+nf_conntrack_hash_check_insert(struct nf_conn *ct)
{
struct net *net = nf_ct_net(ct);
unsigned int hash, repl_hash;
+ struct nf_conntrack_tuple_hash *h;
+ struct hlist_nulls_node *n;
u16 zone;
zone = nf_ct_zone(ct);
- hash = hash_conntrack(net, zone, &ct->tuplehash[IP_CT_DIR_ORIGINAL].tuple);
- repl_hash = hash_conntrack(net, zone, &ct->tuplehash[IP_CT_DIR_REPLY].tuple);
+ hash = hash_conntrack(net, zone,
+ &ct->tuplehash[IP_CT_DIR_ORIGINAL].tuple);
+ repl_hash = hash_conntrack(net, zone,
+ &ct->tuplehash[IP_CT_DIR_REPLY].tuple);
+
+ spin_lock_bh(&nf_conntrack_lock);
+ /* See if there's one in the list already, including reverse */
+ hlist_nulls_for_each_entry(h, n, &net->ct.hash[hash], hnnode)
+ if (nf_ct_tuple_equal(&ct->tuplehash[IP_CT_DIR_ORIGINAL].tuple,
+ &h->tuple) &&
+ zone == nf_ct_zone(nf_ct_tuplehash_to_ctrack(h)))
+ goto out;
+ hlist_nulls_for_each_entry(h, n, &net->ct.hash[repl_hash], hnnode)
+ if (nf_ct_tuple_equal(&ct->tuplehash[IP_CT_DIR_REPLY].tuple,
+ &h->tuple) &&
+ zone == nf_ct_zone(nf_ct_tuplehash_to_ctrack(h)))
+ goto out;
+
+ add_timer(&ct->timeout);
+ nf_conntrack_get(&ct->ct_general);
__nf_conntrack_hash_insert(ct, hash, repl_hash);
+ NF_CT_STAT_INC(net, insert);
+ spin_unlock_bh(&nf_conntrack_lock);
+
+ return 0;
+
+out:
+ NF_CT_STAT_INC(net, insert_failed);
+ spin_unlock_bh(&nf_conntrack_lock);
+ return -EEXIST;
}
-EXPORT_SYMBOL_GPL(nf_conntrack_hash_insert);
+EXPORT_SYMBOL_GPL(nf_conntrack_hash_check_insert);
/* Confirm a connection given skb; places it in hash table */
int
diff --git a/net/netfilter/nf_conntrack_netlink.c b/net/netfilter/nf_conntrack_netlink.c
index cc705175765c..30c9d4ca0218 100644
--- a/net/netfilter/nf_conntrack_netlink.c
+++ b/net/netfilter/nf_conntrack_netlink.c
@@ -1465,11 +1465,10 @@ ctnetlink_create_conntrack(struct net *net, u16 zone,
if (tstamp)
tstamp->start = ktime_to_ns(ktime_get_real());
- add_timer(&ct->timeout);
- spin_lock_bh(&nf_conntrack_lock);
- nf_conntrack_hash_insert(ct);
- nf_conntrack_get(&ct->ct_general);
- spin_unlock_bh(&nf_conntrack_lock);
+ err = nf_conntrack_hash_check_insert(ct);
+ if (err < 0)
+ goto err2;
+
rcu_read_unlock();
return ct;
@@ -1511,12 +1510,10 @@ ctnetlink_new_conntrack(struct sock *ctnl, struct sk_buff *skb,
return err;
}
- spin_lock_bh(&nf_conntrack_lock);
if (cda[CTA_TUPLE_ORIG])
h = nf_conntrack_find_get(net, zone, &otuple);
else if (cda[CTA_TUPLE_REPLY])
h = nf_conntrack_find_get(net, zone, &rtuple);
- spin_unlock_bh(&nf_conntrack_lock);
if (h == NULL) {
err = -ENOENT;