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-rw-r--r--include/net/netfilter/nf_conntrack_expect.h1
-rw-r--r--include/net/netns/conntrack.h1
-rw-r--r--net/ipv4/netfilter/nf_conntrack_l3proto_ipv4_compat.c9
-rw-r--r--net/netfilter/nf_conntrack_expect.c78
-rw-r--r--net/netfilter/nf_conntrack_helper.c2
-rw-r--r--net/netfilter/nf_conntrack_netlink.c18
6 files changed, 65 insertions, 44 deletions
diff --git a/include/net/netfilter/nf_conntrack_expect.h b/include/net/netfilter/nf_conntrack_expect.h
index dce56f09ac9a..5ed33ea4718e 100644
--- a/include/net/netfilter/nf_conntrack_expect.h
+++ b/include/net/netfilter/nf_conntrack_expect.h
@@ -10,6 +10,7 @@
extern unsigned int nf_ct_expect_hsize;
extern unsigned int nf_ct_expect_max;
+extern struct hlist_head *nf_ct_expect_hash;
struct nf_conntrack_expect {
/* Conntrack expectation list member */
diff --git a/include/net/netns/conntrack.h b/include/net/netns/conntrack.h
index 251c435ee330..2811ddcc1a3d 100644
--- a/include/net/netns/conntrack.h
+++ b/include/net/netns/conntrack.h
@@ -94,7 +94,6 @@ struct netns_ct {
int sysctl_checksum;
struct kmem_cache *nf_conntrack_cachep;
- struct hlist_head *expect_hash;
struct ct_pcpu __percpu *pcpu_lists;
struct ip_conntrack_stat __percpu *stat;
struct nf_ct_event_notifier __rcu *nf_conntrack_event_cb;
diff --git a/net/ipv4/netfilter/nf_conntrack_l3proto_ipv4_compat.c b/net/ipv4/netfilter/nf_conntrack_l3proto_ipv4_compat.c
index f8fc7ab201c9..c6f3c406f707 100644
--- a/net/ipv4/netfilter/nf_conntrack_l3proto_ipv4_compat.c
+++ b/net/ipv4/netfilter/nf_conntrack_l3proto_ipv4_compat.c
@@ -236,13 +236,12 @@ struct ct_expect_iter_state {
static struct hlist_node *ct_expect_get_first(struct seq_file *seq)
{
- struct net *net = seq_file_net(seq);
struct ct_expect_iter_state *st = seq->private;
struct hlist_node *n;
for (st->bucket = 0; st->bucket < nf_ct_expect_hsize; st->bucket++) {
n = rcu_dereference(
- hlist_first_rcu(&net->ct.expect_hash[st->bucket]));
+ hlist_first_rcu(&nf_ct_expect_hash[st->bucket]));
if (n)
return n;
}
@@ -252,7 +251,6 @@ static struct hlist_node *ct_expect_get_first(struct seq_file *seq)
static struct hlist_node *ct_expect_get_next(struct seq_file *seq,
struct hlist_node *head)
{
- struct net *net = seq_file_net(seq);
struct ct_expect_iter_state *st = seq->private;
head = rcu_dereference(hlist_next_rcu(head));
@@ -260,7 +258,7 @@ static struct hlist_node *ct_expect_get_next(struct seq_file *seq,
if (++st->bucket >= nf_ct_expect_hsize)
return NULL;
head = rcu_dereference(
- hlist_first_rcu(&net->ct.expect_hash[st->bucket]));
+ hlist_first_rcu(&nf_ct_expect_hash[st->bucket]));
}
return head;
}
@@ -301,6 +299,9 @@ static int exp_seq_show(struct seq_file *s, void *v)
exp = hlist_entry(n, struct nf_conntrack_expect, hnode);
+ if (!net_eq(nf_ct_net(exp->master), seq_file_net(s)))
+ return 0;
+
if (exp->tuple.src.l3num != AF_INET)
return 0;
diff --git a/net/netfilter/nf_conntrack_expect.c b/net/netfilter/nf_conntrack_expect.c
index c2f7c4f475b1..9e3693128313 100644
--- a/net/netfilter/nf_conntrack_expect.c
+++ b/net/netfilter/nf_conntrack_expect.c
@@ -24,6 +24,7 @@
#include <linux/moduleparam.h>
#include <linux/export.h>
#include <net/net_namespace.h>
+#include <net/netns/hash.h>
#include <net/netfilter/nf_conntrack.h>
#include <net/netfilter/nf_conntrack_core.h>
@@ -35,6 +36,9 @@
unsigned int nf_ct_expect_hsize __read_mostly;
EXPORT_SYMBOL_GPL(nf_ct_expect_hsize);
+struct hlist_head *nf_ct_expect_hash __read_mostly;
+EXPORT_SYMBOL_GPL(nf_ct_expect_hash);
+
unsigned int nf_ct_expect_max __read_mostly;
static struct kmem_cache *nf_ct_expect_cachep __read_mostly;
@@ -73,19 +77,32 @@ static void nf_ct_expectation_timed_out(unsigned long ul_expect)
nf_ct_expect_put(exp);
}
-static unsigned int nf_ct_expect_dst_hash(const struct nf_conntrack_tuple *tuple)
+static unsigned int nf_ct_expect_dst_hash(const struct net *n, const struct nf_conntrack_tuple *tuple)
{
- unsigned int hash;
+ unsigned int hash, seed;
get_random_once(&nf_ct_expect_hashrnd, sizeof(nf_ct_expect_hashrnd));
+ seed = nf_ct_expect_hashrnd ^ net_hash_mix(n);
+
hash = jhash2(tuple->dst.u3.all, ARRAY_SIZE(tuple->dst.u3.all),
(((tuple->dst.protonum ^ tuple->src.l3num) << 16) |
- (__force __u16)tuple->dst.u.all) ^ nf_ct_expect_hashrnd);
+ (__force __u16)tuple->dst.u.all) ^ seed);
return reciprocal_scale(hash, nf_ct_expect_hsize);
}
+static bool
+nf_ct_exp_equal(const struct nf_conntrack_tuple *tuple,
+ const struct nf_conntrack_expect *i,
+ const struct nf_conntrack_zone *zone,
+ const struct net *net)
+{
+ return nf_ct_tuple_mask_cmp(tuple, &i->tuple, &i->mask) &&
+ net_eq(net, nf_ct_net(i->master)) &&
+ nf_ct_zone_equal_any(i->master, zone);
+}
+
struct nf_conntrack_expect *
__nf_ct_expect_find(struct net *net,
const struct nf_conntrack_zone *zone,
@@ -97,10 +114,9 @@ __nf_ct_expect_find(struct net *net,
if (!net->ct.expect_count)
return NULL;
- h = nf_ct_expect_dst_hash(tuple);
- hlist_for_each_entry_rcu(i, &net->ct.expect_hash[h], hnode) {
- if (nf_ct_tuple_mask_cmp(tuple, &i->tuple, &i->mask) &&
- nf_ct_zone_equal_any(i->master, zone))
+ h = nf_ct_expect_dst_hash(net, tuple);
+ hlist_for_each_entry_rcu(i, &nf_ct_expect_hash[h], hnode) {
+ if (nf_ct_exp_equal(tuple, i, zone, net))
return i;
}
return NULL;
@@ -138,11 +154,10 @@ nf_ct_find_expectation(struct net *net,
if (!net->ct.expect_count)
return NULL;
- h = nf_ct_expect_dst_hash(tuple);
- hlist_for_each_entry(i, &net->ct.expect_hash[h], hnode) {
+ h = nf_ct_expect_dst_hash(net, tuple);
+ hlist_for_each_entry(i, &nf_ct_expect_hash[h], hnode) {
if (!(i->flags & NF_CT_EXPECT_INACTIVE) &&
- nf_ct_tuple_mask_cmp(tuple, &i->tuple, &i->mask) &&
- nf_ct_zone_equal_any(i->master, zone)) {
+ nf_ct_exp_equal(tuple, i, zone, net)) {
exp = i;
break;
}
@@ -222,6 +237,7 @@ static inline int expect_clash(const struct nf_conntrack_expect *a,
}
return nf_ct_tuple_mask_cmp(&a->tuple, &b->tuple, &intersect_mask) &&
+ net_eq(nf_ct_net(a->master), nf_ct_net(b->master)) &&
nf_ct_zone_equal_any(a->master, nf_ct_zone(b->master));
}
@@ -231,6 +247,7 @@ static inline int expect_matches(const struct nf_conntrack_expect *a,
return a->master == b->master && a->class == b->class &&
nf_ct_tuple_equal(&a->tuple, &b->tuple) &&
nf_ct_tuple_mask_equal(&a->mask, &b->mask) &&
+ net_eq(nf_ct_net(a->master), nf_ct_net(b->master)) &&
nf_ct_zone_equal_any(a->master, nf_ct_zone(b->master));
}
@@ -341,7 +358,7 @@ static int nf_ct_expect_insert(struct nf_conntrack_expect *exp)
struct nf_conn_help *master_help = nfct_help(exp->master);
struct nf_conntrack_helper *helper;
struct net *net = nf_ct_exp_net(exp);
- unsigned int h = nf_ct_expect_dst_hash(&exp->tuple);
+ unsigned int h = nf_ct_expect_dst_hash(net, &exp->tuple);
/* two references : one for hash insert, one for the timer */
atomic_add(2, &exp->use);
@@ -349,7 +366,7 @@ static int nf_ct_expect_insert(struct nf_conntrack_expect *exp)
hlist_add_head(&exp->lnode, &master_help->expectations);
master_help->expecting[exp->class]++;
- hlist_add_head_rcu(&exp->hnode, &net->ct.expect_hash[h]);
+ hlist_add_head_rcu(&exp->hnode, &nf_ct_expect_hash[h]);
net->ct.expect_count++;
setup_timer(&exp->timeout, nf_ct_expectation_timed_out,
@@ -400,8 +417,8 @@ static inline int __nf_ct_expect_check(struct nf_conntrack_expect *expect)
ret = -ESHUTDOWN;
goto out;
}
- h = nf_ct_expect_dst_hash(&expect->tuple);
- hlist_for_each_entry_safe(i, next, &net->ct.expect_hash[h], hnode) {
+ h = nf_ct_expect_dst_hash(net, &expect->tuple);
+ hlist_for_each_entry_safe(i, next, &nf_ct_expect_hash[h], hnode) {
if (expect_matches(i, expect)) {
if (del_timer(&i->timeout)) {
nf_ct_unlink_expect(i);
@@ -467,12 +484,11 @@ struct ct_expect_iter_state {
static struct hlist_node *ct_expect_get_first(struct seq_file *seq)
{
- struct net *net = seq_file_net(seq);
struct ct_expect_iter_state *st = seq->private;
struct hlist_node *n;
for (st->bucket = 0; st->bucket < nf_ct_expect_hsize; st->bucket++) {
- n = rcu_dereference(hlist_first_rcu(&net->ct.expect_hash[st->bucket]));
+ n = rcu_dereference(hlist_first_rcu(&nf_ct_expect_hash[st->bucket]));
if (n)
return n;
}
@@ -482,14 +498,13 @@ static struct hlist_node *ct_expect_get_first(struct seq_file *seq)
static struct hlist_node *ct_expect_get_next(struct seq_file *seq,
struct hlist_node *head)
{
- struct net *net = seq_file_net(seq);
struct ct_expect_iter_state *st = seq->private;
head = rcu_dereference(hlist_next_rcu(head));
while (head == NULL) {
if (++st->bucket >= nf_ct_expect_hsize)
return NULL;
- head = rcu_dereference(hlist_first_rcu(&net->ct.expect_hash[st->bucket]));
+ head = rcu_dereference(hlist_first_rcu(&nf_ct_expect_hash[st->bucket]));
}
return head;
}
@@ -622,28 +637,13 @@ module_param_named(expect_hashsize, nf_ct_expect_hsize, uint, 0400);
int nf_conntrack_expect_pernet_init(struct net *net)
{
- int err = -ENOMEM;
-
net->ct.expect_count = 0;
- net->ct.expect_hash = nf_ct_alloc_hashtable(&nf_ct_expect_hsize, 0);
- if (net->ct.expect_hash == NULL)
- goto err1;
-
- err = exp_proc_init(net);
- if (err < 0)
- goto err2;
-
- return 0;
-err2:
- nf_ct_free_hashtable(net->ct.expect_hash, nf_ct_expect_hsize);
-err1:
- return err;
+ return exp_proc_init(net);
}
void nf_conntrack_expect_pernet_fini(struct net *net)
{
exp_proc_remove(net);
- nf_ct_free_hashtable(net->ct.expect_hash, nf_ct_expect_hsize);
}
int nf_conntrack_expect_init(void)
@@ -659,6 +659,13 @@ int nf_conntrack_expect_init(void)
0, 0, NULL);
if (!nf_ct_expect_cachep)
return -ENOMEM;
+
+ nf_ct_expect_hash = nf_ct_alloc_hashtable(&nf_ct_expect_hsize, 0);
+ if (!nf_ct_expect_hash) {
+ kmem_cache_destroy(nf_ct_expect_cachep);
+ return -ENOMEM;
+ }
+
return 0;
}
@@ -666,4 +673,5 @@ void nf_conntrack_expect_fini(void)
{
rcu_barrier(); /* Wait for call_rcu() before destroy */
kmem_cache_destroy(nf_ct_expect_cachep);
+ nf_ct_free_hashtable(nf_ct_expect_hash, nf_ct_expect_hsize);
}
diff --git a/net/netfilter/nf_conntrack_helper.c b/net/netfilter/nf_conntrack_helper.c
index cb48e6adba2c..f703adb7e5f7 100644
--- a/net/netfilter/nf_conntrack_helper.c
+++ b/net/netfilter/nf_conntrack_helper.c
@@ -400,7 +400,7 @@ static void __nf_conntrack_helper_unregister(struct nf_conntrack_helper *me,
spin_lock_bh(&nf_conntrack_expect_lock);
for (i = 0; i < nf_ct_expect_hsize; i++) {
hlist_for_each_entry_safe(exp, next,
- &net->ct.expect_hash[i], hnode) {
+ &nf_ct_expect_hash[i], hnode) {
struct nf_conn_help *help = nfct_help(exp->master);
if ((rcu_dereference_protected(
help->helper,
diff --git a/net/netfilter/nf_conntrack_netlink.c b/net/netfilter/nf_conntrack_netlink.c
index e00f178c48b0..a18d1ceabad5 100644
--- a/net/netfilter/nf_conntrack_netlink.c
+++ b/net/netfilter/nf_conntrack_netlink.c
@@ -2632,10 +2632,14 @@ ctnetlink_exp_dump_table(struct sk_buff *skb, struct netlink_callback *cb)
last = (struct nf_conntrack_expect *)cb->args[1];
for (; cb->args[0] < nf_ct_expect_hsize; cb->args[0]++) {
restart:
- hlist_for_each_entry(exp, &net->ct.expect_hash[cb->args[0]],
+ hlist_for_each_entry(exp, &nf_ct_expect_hash[cb->args[0]],
hnode) {
if (l3proto && exp->tuple.src.l3num != l3proto)
continue;
+
+ if (!net_eq(nf_ct_net(exp->master), net))
+ continue;
+
if (cb->args[1]) {
if (exp != last)
continue;
@@ -2886,8 +2890,12 @@ static int ctnetlink_del_expect(struct net *net, struct sock *ctnl,
spin_lock_bh(&nf_conntrack_expect_lock);
for (i = 0; i < nf_ct_expect_hsize; i++) {
hlist_for_each_entry_safe(exp, next,
- &net->ct.expect_hash[i],
+ &nf_ct_expect_hash[i],
hnode) {
+
+ if (!net_eq(nf_ct_exp_net(exp), net))
+ continue;
+
m_help = nfct_help(exp->master);
if (!strcmp(m_help->helper->name, name) &&
del_timer(&exp->timeout)) {
@@ -2904,8 +2912,12 @@ static int ctnetlink_del_expect(struct net *net, struct sock *ctnl,
spin_lock_bh(&nf_conntrack_expect_lock);
for (i = 0; i < nf_ct_expect_hsize; i++) {
hlist_for_each_entry_safe(exp, next,
- &net->ct.expect_hash[i],
+ &nf_ct_expect_hash[i],
hnode) {
+
+ if (!net_eq(nf_ct_exp_net(exp), net))
+ continue;
+
if (del_timer(&exp->timeout)) {
nf_ct_unlink_expect_report(exp,
NETLINK_CB(skb).portid,
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