aboutsummaryrefslogtreecommitdiff
path: root/net/netfilter/nf_conntrack_core.c
diff options
context:
space:
mode:
Diffstat (limited to 'net/netfilter/nf_conntrack_core.c')
-rw-r--r--net/netfilter/nf_conntrack_core.c344
1 files changed, 206 insertions, 138 deletions
diff --git a/net/netfilter/nf_conntrack_core.c b/net/netfilter/nf_conntrack_core.c
index 9d1830da8e8..27de3c7b006 100644
--- a/net/netfilter/nf_conntrack_core.c
+++ b/net/netfilter/nf_conntrack_core.c
@@ -44,30 +44,17 @@
DEFINE_SPINLOCK(nf_conntrack_lock);
EXPORT_SYMBOL_GPL(nf_conntrack_lock);
-/* nf_conntrack_standalone needs this */
-atomic_t nf_conntrack_count = ATOMIC_INIT(0);
-EXPORT_SYMBOL_GPL(nf_conntrack_count);
-
unsigned int nf_conntrack_htable_size __read_mostly;
EXPORT_SYMBOL_GPL(nf_conntrack_htable_size);
int nf_conntrack_max __read_mostly;
EXPORT_SYMBOL_GPL(nf_conntrack_max);
-struct hlist_head *nf_conntrack_hash __read_mostly;
-EXPORT_SYMBOL_GPL(nf_conntrack_hash);
-
struct nf_conn nf_conntrack_untracked __read_mostly;
EXPORT_SYMBOL_GPL(nf_conntrack_untracked);
-unsigned int nf_ct_log_invalid __read_mostly;
-HLIST_HEAD(unconfirmed);
-static int nf_conntrack_vmalloc __read_mostly;
static struct kmem_cache *nf_conntrack_cachep __read_mostly;
-DEFINE_PER_CPU(struct ip_conntrack_stat, nf_conntrack_stat);
-EXPORT_PER_CPU_SYMBOL(nf_conntrack_stat);
-
static int nf_conntrack_hash_rnd_initted;
static unsigned int nf_conntrack_hash_rnd;
@@ -180,6 +167,7 @@ static void
destroy_conntrack(struct nf_conntrack *nfct)
{
struct nf_conn *ct = (struct nf_conn *)nfct;
+ struct net *net = nf_ct_net(ct);
struct nf_conntrack_l4proto *l4proto;
pr_debug("destroy_conntrack(%p)\n", ct);
@@ -212,7 +200,7 @@ destroy_conntrack(struct nf_conntrack *nfct)
hlist_del(&ct->tuplehash[IP_CT_DIR_ORIGINAL].hnode);
}
- NF_CT_STAT_INC(delete);
+ NF_CT_STAT_INC(net, delete);
spin_unlock_bh(&nf_conntrack_lock);
if (ct->master)
@@ -225,6 +213,7 @@ destroy_conntrack(struct nf_conntrack *nfct)
static void death_by_timeout(unsigned long ul_conntrack)
{
struct nf_conn *ct = (void *)ul_conntrack;
+ struct net *net = nf_ct_net(ct);
struct nf_conn_help *help = nfct_help(ct);
struct nf_conntrack_helper *helper;
@@ -239,14 +228,14 @@ static void death_by_timeout(unsigned long ul_conntrack)
spin_lock_bh(&nf_conntrack_lock);
/* Inside lock so preempt is disabled on module removal path.
* Otherwise we can get spurious warnings. */
- NF_CT_STAT_INC(delete_list);
+ NF_CT_STAT_INC(net, delete_list);
clean_from_lists(ct);
spin_unlock_bh(&nf_conntrack_lock);
nf_ct_put(ct);
}
struct nf_conntrack_tuple_hash *
-__nf_conntrack_find(const struct nf_conntrack_tuple *tuple)
+__nf_conntrack_find(struct net *net, const struct nf_conntrack_tuple *tuple)
{
struct nf_conntrack_tuple_hash *h;
struct hlist_node *n;
@@ -256,13 +245,13 @@ __nf_conntrack_find(const struct nf_conntrack_tuple *tuple)
* at least once for the stats anyway.
*/
local_bh_disable();
- hlist_for_each_entry_rcu(h, n, &nf_conntrack_hash[hash], hnode) {
+ hlist_for_each_entry_rcu(h, n, &net->ct.hash[hash], hnode) {
if (nf_ct_tuple_equal(tuple, &h->tuple)) {
- NF_CT_STAT_INC(found);
+ NF_CT_STAT_INC(net, found);
local_bh_enable();
return h;
}
- NF_CT_STAT_INC(searched);
+ NF_CT_STAT_INC(net, searched);
}
local_bh_enable();
@@ -272,13 +261,13 @@ EXPORT_SYMBOL_GPL(__nf_conntrack_find);
/* Find a connection corresponding to a tuple. */
struct nf_conntrack_tuple_hash *
-nf_conntrack_find_get(const struct nf_conntrack_tuple *tuple)
+nf_conntrack_find_get(struct net *net, const struct nf_conntrack_tuple *tuple)
{
struct nf_conntrack_tuple_hash *h;
struct nf_conn *ct;
rcu_read_lock();
- h = __nf_conntrack_find(tuple);
+ h = __nf_conntrack_find(net, tuple);
if (h) {
ct = nf_ct_tuplehash_to_ctrack(h);
if (unlikely(!atomic_inc_not_zero(&ct->ct_general.use)))
@@ -294,10 +283,12 @@ static void __nf_conntrack_hash_insert(struct nf_conn *ct,
unsigned int hash,
unsigned int repl_hash)
{
+ struct net *net = nf_ct_net(ct);
+
hlist_add_head_rcu(&ct->tuplehash[IP_CT_DIR_ORIGINAL].hnode,
- &nf_conntrack_hash[hash]);
+ &net->ct.hash[hash]);
hlist_add_head_rcu(&ct->tuplehash[IP_CT_DIR_REPLY].hnode,
- &nf_conntrack_hash[repl_hash]);
+ &net->ct.hash[repl_hash]);
}
void nf_conntrack_hash_insert(struct nf_conn *ct)
@@ -323,8 +314,10 @@ __nf_conntrack_confirm(struct sk_buff *skb)
struct nf_conn_help *help;
struct hlist_node *n;
enum ip_conntrack_info ctinfo;
+ struct net *net;
ct = nf_ct_get(skb, &ctinfo);
+ net = nf_ct_net(ct);
/* ipt_REJECT uses nf_conntrack_attach to attach related
ICMP/TCP RST packets in other direction. Actual packet
@@ -351,11 +344,11 @@ __nf_conntrack_confirm(struct sk_buff *skb)
/* See if there's one in the list already, including reverse:
NAT could have grabbed it without realizing, since we're
not in the hash. If there is, we lost race. */
- hlist_for_each_entry(h, n, &nf_conntrack_hash[hash], hnode)
+ hlist_for_each_entry(h, n, &net->ct.hash[hash], hnode)
if (nf_ct_tuple_equal(&ct->tuplehash[IP_CT_DIR_ORIGINAL].tuple,
&h->tuple))
goto out;
- hlist_for_each_entry(h, n, &nf_conntrack_hash[repl_hash], hnode)
+ hlist_for_each_entry(h, n, &net->ct.hash[repl_hash], hnode)
if (nf_ct_tuple_equal(&ct->tuplehash[IP_CT_DIR_REPLY].tuple,
&h->tuple))
goto out;
@@ -371,22 +364,22 @@ __nf_conntrack_confirm(struct sk_buff *skb)
add_timer(&ct->timeout);
atomic_inc(&ct->ct_general.use);
set_bit(IPS_CONFIRMED_BIT, &ct->status);
- NF_CT_STAT_INC(insert);
+ NF_CT_STAT_INC(net, insert);
spin_unlock_bh(&nf_conntrack_lock);
help = nfct_help(ct);
if (help && help->helper)
- nf_conntrack_event_cache(IPCT_HELPER, skb);
+ nf_conntrack_event_cache(IPCT_HELPER, ct);
#ifdef CONFIG_NF_NAT_NEEDED
if (test_bit(IPS_SRC_NAT_DONE_BIT, &ct->status) ||
test_bit(IPS_DST_NAT_DONE_BIT, &ct->status))
- nf_conntrack_event_cache(IPCT_NATINFO, skb);
+ nf_conntrack_event_cache(IPCT_NATINFO, ct);
#endif
nf_conntrack_event_cache(master_ct(ct) ?
- IPCT_RELATED : IPCT_NEW, skb);
+ IPCT_RELATED : IPCT_NEW, ct);
return NF_ACCEPT;
out:
- NF_CT_STAT_INC(insert_failed);
+ NF_CT_STAT_INC(net, insert_failed);
spin_unlock_bh(&nf_conntrack_lock);
return NF_DROP;
}
@@ -398,6 +391,7 @@ int
nf_conntrack_tuple_taken(const struct nf_conntrack_tuple *tuple,
const struct nf_conn *ignored_conntrack)
{
+ struct net *net = nf_ct_net(ignored_conntrack);
struct nf_conntrack_tuple_hash *h;
struct hlist_node *n;
unsigned int hash = hash_conntrack(tuple);
@@ -406,14 +400,14 @@ nf_conntrack_tuple_taken(const struct nf_conntrack_tuple *tuple,
* least once for the stats anyway.
*/
rcu_read_lock_bh();
- hlist_for_each_entry_rcu(h, n, &nf_conntrack_hash[hash], hnode) {
+ hlist_for_each_entry_rcu(h, n, &net->ct.hash[hash], hnode) {
if (nf_ct_tuplehash_to_ctrack(h) != ignored_conntrack &&
nf_ct_tuple_equal(tuple, &h->tuple)) {
- NF_CT_STAT_INC(found);
+ NF_CT_STAT_INC(net, found);
rcu_read_unlock_bh();
return 1;
}
- NF_CT_STAT_INC(searched);
+ NF_CT_STAT_INC(net, searched);
}
rcu_read_unlock_bh();
@@ -425,7 +419,7 @@ EXPORT_SYMBOL_GPL(nf_conntrack_tuple_taken);
/* There's a small race here where we may free a just-assured
connection. Too bad: we're in trouble anyway. */
-static noinline int early_drop(unsigned int hash)
+static noinline int early_drop(struct net *net, unsigned int hash)
{
/* Use oldest entry, which is roughly LRU */
struct nf_conntrack_tuple_hash *h;
@@ -436,7 +430,7 @@ static noinline int early_drop(unsigned int hash)
rcu_read_lock();
for (i = 0; i < nf_conntrack_htable_size; i++) {
- hlist_for_each_entry_rcu(h, n, &nf_conntrack_hash[hash],
+ hlist_for_each_entry_rcu(h, n, &net->ct.hash[hash],
hnode) {
tmp = nf_ct_tuplehash_to_ctrack(h);
if (!test_bit(IPS_ASSURED_BIT, &tmp->status))
@@ -458,13 +452,14 @@ static noinline int early_drop(unsigned int hash)
if (del_timer(&ct->timeout)) {
death_by_timeout((unsigned long)ct);
dropped = 1;
- NF_CT_STAT_INC_ATOMIC(early_drop);
+ NF_CT_STAT_INC_ATOMIC(net, early_drop);
}
nf_ct_put(ct);
return dropped;
}
-struct nf_conn *nf_conntrack_alloc(const struct nf_conntrack_tuple *orig,
+struct nf_conn *nf_conntrack_alloc(struct net *net,
+ const struct nf_conntrack_tuple *orig,
const struct nf_conntrack_tuple *repl,
gfp_t gfp)
{
@@ -476,13 +471,13 @@ struct nf_conn *nf_conntrack_alloc(const struct nf_conntrack_tuple *orig,
}
/* We don't want any race condition at early drop stage */
- atomic_inc(&nf_conntrack_count);
+ atomic_inc(&net->ct.count);
if (nf_conntrack_max &&
- unlikely(atomic_read(&nf_conntrack_count) > nf_conntrack_max)) {
+ unlikely(atomic_read(&net->ct.count) > nf_conntrack_max)) {
unsigned int hash = hash_conntrack(orig);
- if (!early_drop(hash)) {
- atomic_dec(&nf_conntrack_count);
+ if (!early_drop(net, hash)) {
+ atomic_dec(&net->ct.count);
if (net_ratelimit())
printk(KERN_WARNING
"nf_conntrack: table full, dropping"
@@ -494,7 +489,7 @@ struct nf_conn *nf_conntrack_alloc(const struct nf_conntrack_tuple *orig,
ct = kmem_cache_zalloc(nf_conntrack_cachep, gfp);
if (ct == NULL) {
pr_debug("nf_conntrack_alloc: Can't alloc conntrack.\n");
- atomic_dec(&nf_conntrack_count);
+ atomic_dec(&net->ct.count);
return ERR_PTR(-ENOMEM);
}
@@ -503,6 +498,9 @@ struct nf_conn *nf_conntrack_alloc(const struct nf_conntrack_tuple *orig,
ct->tuplehash[IP_CT_DIR_REPLY].tuple = *repl;
/* Don't set timer yet: wait for confirmation */
setup_timer(&ct->timeout, death_by_timeout, (unsigned long)ct);
+#ifdef CONFIG_NET_NS
+ ct->ct_net = net;
+#endif
INIT_RCU_HEAD(&ct->rcu);
return ct;
@@ -512,10 +510,11 @@ EXPORT_SYMBOL_GPL(nf_conntrack_alloc);
static void nf_conntrack_free_rcu(struct rcu_head *head)
{
struct nf_conn *ct = container_of(head, struct nf_conn, rcu);
+ struct net *net = nf_ct_net(ct);
nf_ct_ext_free(ct);
kmem_cache_free(nf_conntrack_cachep, ct);
- atomic_dec(&nf_conntrack_count);
+ atomic_dec(&net->ct.count);
}
void nf_conntrack_free(struct nf_conn *ct)
@@ -528,7 +527,8 @@ EXPORT_SYMBOL_GPL(nf_conntrack_free);
/* Allocate a new conntrack: we return -ENOMEM if classification
failed due to stress. Otherwise it really is unclassifiable. */
static struct nf_conntrack_tuple_hash *
-init_conntrack(const struct nf_conntrack_tuple *tuple,
+init_conntrack(struct net *net,
+ const struct nf_conntrack_tuple *tuple,
struct nf_conntrack_l3proto *l3proto,
struct nf_conntrack_l4proto *l4proto,
struct sk_buff *skb,
@@ -544,7 +544,7 @@ init_conntrack(const struct nf_conntrack_tuple *tuple,
return NULL;
}
- ct = nf_conntrack_alloc(tuple, &repl_tuple, GFP_ATOMIC);
+ ct = nf_conntrack_alloc(net, tuple, &repl_tuple, GFP_ATOMIC);
if (ct == NULL || IS_ERR(ct)) {
pr_debug("Can't allocate conntrack.\n");
return (struct nf_conntrack_tuple_hash *)ct;
@@ -559,7 +559,7 @@ init_conntrack(const struct nf_conntrack_tuple *tuple,
nf_ct_acct_ext_add(ct, GFP_ATOMIC);
spin_lock_bh(&nf_conntrack_lock);
- exp = nf_ct_find_expectation(tuple);
+ exp = nf_ct_find_expectation(net, tuple);
if (exp) {
pr_debug("conntrack: expectation arrives ct=%p exp=%p\n",
ct, exp);
@@ -579,7 +579,7 @@ init_conntrack(const struct nf_conntrack_tuple *tuple,
ct->secmark = exp->master->secmark;
#endif
nf_conntrack_get(&ct->master->ct_general);
- NF_CT_STAT_INC(expect_new);
+ NF_CT_STAT_INC(net, expect_new);
} else {
struct nf_conntrack_helper *helper;
@@ -589,11 +589,12 @@ init_conntrack(const struct nf_conntrack_tuple *tuple,
if (help)
rcu_assign_pointer(help->helper, helper);
}
- NF_CT_STAT_INC(new);
+ NF_CT_STAT_INC(net, new);
}
/* Overload tuple linked list to put us in unconfirmed list. */
- hlist_add_head(&ct->tuplehash[IP_CT_DIR_ORIGINAL].hnode, &unconfirmed);
+ hlist_add_head(&ct->tuplehash[IP_CT_DIR_ORIGINAL].hnode,
+ &net->ct.unconfirmed);
spin_unlock_bh(&nf_conntrack_lock);
@@ -608,7 +609,8 @@ init_conntrack(const struct nf_conntrack_tuple *tuple,
/* On success, returns conntrack ptr, sets skb->nfct and ctinfo */
static inline struct nf_conn *
-resolve_normal_ct(struct sk_buff *skb,
+resolve_normal_ct(struct net *net,
+ struct sk_buff *skb,
unsigned int dataoff,
u_int16_t l3num,
u_int8_t protonum,
@@ -629,9 +631,9 @@ resolve_normal_ct(struct sk_buff *skb,
}
/* look for tuple match */
- h = nf_conntrack_find_get(&tuple);
+ h = nf_conntrack_find_get(net, &tuple);
if (!h) {
- h = init_conntrack(&tuple, l3proto, l4proto, skb, dataoff);
+ h = init_conntrack(net, &tuple, l3proto, l4proto, skb, dataoff);
if (!h)
return NULL;
if (IS_ERR(h))
@@ -665,7 +667,8 @@ resolve_normal_ct(struct sk_buff *skb,
}
unsigned int
-nf_conntrack_in(int pf, unsigned int hooknum, struct sk_buff *skb)
+nf_conntrack_in(struct net *net, u_int8_t pf, unsigned int hooknum,
+ struct sk_buff *skb)
{
struct nf_conn *ct;
enum ip_conntrack_info ctinfo;
@@ -678,44 +681,46 @@ nf_conntrack_in(int pf, unsigned int hooknum, struct sk_buff *skb)
/* Previously seen (loopback or untracked)? Ignore. */
if (skb->nfct) {
- NF_CT_STAT_INC_ATOMIC(ignore);
+ NF_CT_STAT_INC_ATOMIC(net, ignore);
return NF_ACCEPT;
}
/* rcu_read_lock()ed by nf_hook_slow */
- l3proto = __nf_ct_l3proto_find((u_int16_t)pf);
+ l3proto = __nf_ct_l3proto_find(pf);
ret = l3proto->get_l4proto(skb, skb_network_offset(skb),
&dataoff, &protonum);
if (ret <= 0) {
pr_debug("not prepared to track yet or error occured\n");
- NF_CT_STAT_INC_ATOMIC(error);
- NF_CT_STAT_INC_ATOMIC(invalid);
+ NF_CT_STAT_INC_ATOMIC(net, error);
+ NF_CT_STAT_INC_ATOMIC(net, invalid);
return -ret;
}
- l4proto = __nf_ct_l4proto_find((u_int16_t)pf, protonum);
+ l4proto = __nf_ct_l4proto_find(pf, protonum);
/* It may be an special packet, error, unclean...
* inverse of the return code tells to the netfilter
* core what to do with the packet. */
- if (l4proto->error != NULL &&
- (ret = l4proto->error(skb, dataoff, &ctinfo, pf, hooknum)) <= 0) {
- NF_CT_STAT_INC_ATOMIC(error);
- NF_CT_STAT_INC_ATOMIC(invalid);
- return -ret;
+ if (l4proto->error != NULL) {
+ ret = l4proto->error(net, skb, dataoff, &ctinfo, pf, hooknum);
+ if (ret <= 0) {
+ NF_CT_STAT_INC_ATOMIC(net, error);
+ NF_CT_STAT_INC_ATOMIC(net, invalid);
+ return -ret;
+ }
}
- ct = resolve_normal_ct(skb, dataoff, pf, protonum, l3proto, l4proto,
- &set_reply, &ctinfo);
+ ct = resolve_normal_ct(net, skb, dataoff, pf, protonum,
+ l3proto, l4proto, &set_reply, &ctinfo);
if (!ct) {
/* Not valid part of a connection */
- NF_CT_STAT_INC_ATOMIC(invalid);
+ NF_CT_STAT_INC_ATOMIC(net, invalid);
return NF_ACCEPT;
}
if (IS_ERR(ct)) {
/* Too stressed to deal. */
- NF_CT_STAT_INC_ATOMIC(drop);
+ NF_CT_STAT_INC_ATOMIC(net, drop);
return NF_DROP;
}
@@ -728,12 +733,12 @@ nf_conntrack_in(int pf, unsigned int hooknum, struct sk_buff *skb)
pr_debug("nf_conntrack_in: Can't track with proto module\n");
nf_conntrack_put(skb->nfct);
skb->nfct = NULL;
- NF_CT_STAT_INC_ATOMIC(invalid);
+ NF_CT_STAT_INC_ATOMIC(net, invalid);
return -ret;
}
if (set_reply && !test_and_set_bit(IPS_SEEN_REPLY_BIT, &ct->status))
- nf_conntrack_event_cache(IPCT_STATUS, skb);
+ nf_conntrack_event_cache(IPCT_STATUS, ct);
return ret;
}
@@ -846,7 +851,7 @@ acct:
/* must be unlocked when calling event cache */
if (event)
- nf_conntrack_event_cache(event, skb);
+ nf_conntrack_event_cache(event, ct);
}
EXPORT_SYMBOL_GPL(__nf_ct_refresh_acct);
@@ -938,7 +943,7 @@ static void nf_conntrack_attach(struct sk_buff *nskb, struct sk_buff *skb)
/* Bring out ya dead! */
static struct nf_conn *
-get_next_corpse(int (*iter)(struct nf_conn *i, void *data),
+get_next_corpse(struct net *net, int (*iter)(struct nf_conn *i, void *data),
void *data, unsigned int *bucket)
{
struct nf_conntrack_tuple_hash *h;
@@ -947,13 +952,13 @@ get_next_corpse(int (*iter)(struct nf_conn *i, void *data),
spin_lock_bh(&nf_conntrack_lock);
for (; *bucket < nf_conntrack_htable_size; (*bucket)++) {
- hlist_for_each_entry(h, n, &nf_conntrack_hash[*bucket], hnode) {
+ hlist_for_each_entry(h, n, &net->ct.hash[*bucket], hnode) {
ct = nf_ct_tuplehash_to_ctrack(h);
if (iter(ct, data))
goto found;
}
}
- hlist_for_each_entry(h, n, &unconfirmed, hnode) {
+ hlist_for_each_entry(h, n, &net->ct.unconfirmed, hnode) {
ct = nf_ct_tuplehash_to_ctrack(h);
if (iter(ct, data))
set_bit(IPS_DYING_BIT, &ct->status);
@@ -966,13 +971,14 @@ found:
return ct;
}
-void
-nf_ct_iterate_cleanup(int (*iter)(struct nf_conn *i, void *data), void *data)
+void nf_ct_iterate_cleanup(struct net *net,
+ int (*iter)(struct nf_conn *i, void *data),
+ void *data)
{
struct nf_conn *ct;
unsigned int bucket = 0;
- while ((ct = get_next_corpse(iter, data, &bucket)) != NULL) {
+ while ((ct = get_next_corpse(net, iter, data, &bucket)) != NULL) {
/* Time to push up daises... */
if (del_timer(&ct->timeout))
death_by_timeout((unsigned long)ct);
@@ -998,27 +1004,26 @@ void nf_ct_free_hashtable(struct hlist_head *hash, int vmalloced, unsigned int s
}
EXPORT_SYMBOL_GPL(nf_ct_free_hashtable);
-void nf_conntrack_flush(void)
+void nf_conntrack_flush(struct net *net)
{
- nf_ct_iterate_cleanup(kill_all, NULL);
+ nf_ct_iterate_cleanup(net, kill_all, NULL);
}
EXPORT_SYMBOL_GPL(nf_conntrack_flush);
-/* Mishearing the voices in his head, our hero wonders how he's
- supposed to kill the mall. */
-void nf_conntrack_cleanup(void)
+static void nf_conntrack_cleanup_init_net(void)
{
- rcu_assign_pointer(ip_ct_attach, NULL);
-
- /* This makes sure all current packets have passed through
- netfilter framework. Roll on, two-stage module
- delete... */
- synchronize_net();
+ nf_conntrack_helper_fini();
+ nf_conntrack_proto_fini();
+ kmem_cache_destroy(nf_conntrack_cachep);
+}
- nf_ct_event_cache_flush();
+static void nf_conntrack_cleanup_net(struct net *net)
+{
+ nf_ct_event_cache_flush(net);
+ nf_conntrack_ecache_fini(net);
i_see_dead_people:
- nf_conntrack_flush();
- if (atomic_read(&nf_conntrack_count) != 0) {
+ nf_conntrack_flush(net);
+ if (atomic_read(&net->ct.count) != 0) {
schedule();
goto i_see_dead_people;
}
@@ -1026,16 +1031,31 @@ void nf_conntrack_cleanup(void)
while (atomic_read(&nf_conntrack_untracked.ct_general.use) > 1)
schedule();
- rcu_assign_pointer(nf_ct_destroy, NULL);
-
- kmem_cache_destroy(nf_conntrack_cachep);
- nf_ct_free_hashtable(nf_conntrack_hash, nf_conntrack_vmalloc,
+ nf_ct_free_hashtable(net->ct.hash, net->ct.hash_vmalloc,
nf_conntrack_htable_size);
+ nf_conntrack_acct_fini(net);
+ nf_conntrack_expect_fini(net);
+ free_percpu(net->ct.stat);
+}
- nf_conntrack_acct_fini();
- nf_conntrack_expect_fini();
- nf_conntrack_helper_fini();
- nf_conntrack_proto_fini();
+/* Mishearing the voices in his head, our hero wonders how he's
+ supposed to kill the mall. */
+void nf_conntrack_cleanup(struct net *net)
+{
+ if (net_eq(net, &init_net))
+ rcu_assign_pointer(ip_ct_attach, NULL);
+
+ /* This makes sure all current packets have passed through
+ netfilter framework. Roll on, two-stage module
+ delete... */
+ synchronize_net();
+
+ nf_conntrack_cleanup_net(net);
+
+ if (net_eq(net, &init_net)) {
+ rcu_assign_pointer(nf_ct_destroy, NULL);
+ nf_conntrack_cleanup_init_net();
+ }
}
struct hlist_head *nf_ct_alloc_hashtable(unsigned int *sizep, int *vmalloced)
@@ -1094,8 +1114,8 @@ int nf_conntrack_set_hashsize(const char *val, struct kernel_param *kp)
*/
spin_lock_bh(&nf_conntrack_lock);
for (i = 0; i < nf_conntrack_htable_size; i++) {
- while (!hlist_empty(&nf_conntrack_hash[i])) {
- h = hlist_entry(nf_conntrack_hash[i].first,
+ while (!hlist_empty(&init_net.ct.hash[i])) {
+ h = hlist_entry(init_net.ct.hash[i].first,
struct nf_conntrack_tuple_hash, hnode);
hlist_del_rcu(&h->hnode);
bucket = __hash_conntrack(&h->tuple, hashsize, rnd);
@@ -1103,12 +1123,12 @@ int nf_conntrack_set_hashsize(const char *val, struct kernel_param *kp)
}
}
old_size = nf_conntrack_htable_size;
- old_vmalloced = nf_conntrack_vmalloc;
- old_hash = nf_conntrack_hash;
+ old_vmalloced = init_net.ct.hash_vmalloc;
+ old_hash = init_net.ct.hash;
nf_conntrack_htable_size = hashsize;
- nf_conntrack_vmalloc = vmalloced;
- nf_conntrack_hash = hash;
+ init_net.ct.hash_vmalloc = vmalloced;
+ init_net.ct.hash = hash;
nf_conntrack_hash_rnd = rnd;
spin_unlock_bh(&nf_conntrack_lock);
@@ -1120,7 +1140,7 @@ EXPORT_SYMBOL_GPL(nf_conntrack_set_hashsize);
module_param_call(hashsize, nf_conntrack_set_hashsize, param_get_uint,
&nf_conntrack_htable_size, 0600);
-int __init nf_conntrack_init(void)
+static int nf_conntrack_init_init_net(void)
{
int max_factor = 8;
int ret;
@@ -1142,13 +1162,6 @@ int __init nf_conntrack_init(void)
* entries. */
max_factor = 4;
}
- nf_conntrack_hash = nf_ct_alloc_hashtable(&nf_conntrack_htable_size,
- &nf_conntrack_vmalloc);
- if (!nf_conntrack_hash) {
- printk(KERN_ERR "Unable to create nf_conntrack_hash\n");
- goto err_out;
- }
-
nf_conntrack_max = max_factor * nf_conntrack_htable_size;
printk("nf_conntrack version %s (%u buckets, %d max)\n",
@@ -1160,48 +1173,103 @@ int __init nf_conntrack_init(void)
0, 0, NULL);
if (!nf_conntrack_cachep) {
printk(KERN_ERR "Unable to create nf_conn slab cache\n");
- goto err_free_hash;
+ ret = -ENOMEM;
+ goto err_cache;
}
ret = nf_conntrack_proto_init();
if (ret < 0)
- goto err_free_conntrack_slab;
-
- ret = nf_conntrack_expect_init();
- if (ret < 0)
- goto out_fini_proto;
+ goto err_proto;
ret = nf_conntrack_helper_init();
if (ret < 0)
- goto out_fini_expect;
+ goto err_helper;
- ret = nf_conntrack_acct_init();
- if (ret < 0)
- goto out_fini_helper;
+ return 0;
- /* For use by REJECT target */
- rcu_assign_pointer(ip_ct_attach, nf_conntrack_attach);
- rcu_assign_pointer(nf_ct_destroy, destroy_conntrack);
+err_helper:
+ nf_conntrack_proto_fini();
+err_proto:
+ kmem_cache_destroy(nf_conntrack_cachep);
+err_cache:
+ return ret;
+}
+
+static int nf_conntrack_init_net(struct net *net)
+{
+ int ret;
+
+ atomic_set(&net->ct.count, 0);
+ INIT_HLIST_HEAD(&net->ct.unconfirmed);
+ net->ct.stat = alloc_percpu(struct ip_conntrack_stat);
+ if (!net->ct.stat) {
+ ret = -ENOMEM;
+ goto err_stat;
+ }
+ ret = nf_conntrack_ecache_init(net);
+ if (ret < 0)
+ goto err_ecache;
+ net->ct.hash = nf_ct_alloc_hashtable(&nf_conntrack_htable_size,
+ &net->ct.hash_vmalloc);
+ if (!net->ct.hash) {
+ ret = -ENOMEM;
+ printk(KERN_ERR "Unable to create nf_conntrack_hash\n");
+ goto err_hash;
+ }
+ ret = nf_conntrack_expect_init(net);
+ if (ret < 0)
+ goto err_expect;
+ ret = nf_conntrack_acct_init(net);
+ if (ret < 0)
+ goto err_acct;
/* Set up fake conntrack:
- to never be deleted, not in any hashes */
+#ifdef CONFIG_NET_NS
+ nf_conntrack_untracked.ct_net = &init_net;
+#endif
atomic_set(&nf_conntrack_untracked.ct_general.use, 1);
/* - and look it like as a confirmed connection */
set_bit(IPS_CONFIRMED_BIT, &nf_conntrack_untracked.status);
- return ret;
+ return 0;
-out_fini_helper:
- nf_conntrack_helper_fini();
-out_fini_expect:
- nf_conntrack_expect_fini();
-out_fini_proto:
- nf_conntrack_proto_fini();
-err_free_conntrack_slab:
- kmem_cache_destroy(nf_conntrack_cachep);
-err_free_hash:
- nf_ct_free_hashtable(nf_conntrack_hash, nf_conntrack_vmalloc,
+err_acct:
+ nf_conntrack_expect_fini(net);
+err_expect:
+ nf_ct_free_hashtable(net->ct.hash, net->ct.hash_vmalloc,
nf_conntrack_htable_size);
-err_out:
- return -ENOMEM;
+err_hash:
+ nf_conntrack_ecache_fini(net);
+err_ecache:
+ free_percpu(net->ct.stat);
+err_stat:
+ return ret;
+}
+
+int nf_conntrack_init(struct net *net)
+{
+ int ret;
+
+ if (net_eq(net, &init_net)) {
+ ret = nf_conntrack_init_init_net();
+ if (ret < 0)
+ goto out_init_net;
+ }
+ ret = nf_conntrack_init_net(net);
+ if (ret < 0)
+ goto out_net;
+
+ if (net_eq(net, &init_net)) {
+ /* For use by REJECT target */
+ rcu_assign_pointer(ip_ct_attach, nf_conntrack_attach);
+ rcu_assign_pointer(nf_ct_destroy, destroy_conntrack);
+ }
+ return 0;
+
+out_net:
+ if (net_eq(net, &init_net))
+ nf_conntrack_cleanup_init_net();
+out_init_net:
+ return ret;
}
generated by cgit v1.2.3 (git 2.25.1) at 2024-05-19 08:53:36 +0000