1 files changed, 30 insertions, 13 deletions

diff --git a/net/ipv4/inet_hashtables.c b/net/ipv4/inet_hashtables.c
index 1aba606f6bbb..2023d37b2708 100644
--- a/net/ipv4/inet_hashtables.c
+++ b/net/ipv4/inet_hashtables.c
@@ -35,7 +35,7 @@ struct inet_bind_bucket *inet_bind_bucket_create(struct kmem_cache *cachep,
 	struct inet_bind_bucket *tb = kmem_cache_alloc(cachep, GFP_ATOMIC);
 
 	if (tb != NULL) {
-		tb->ib_net       = net;
+		tb->ib_net       = hold_net(net);
 		tb->port      = snum;
 		tb->fastreuse = 0;
 		INIT_HLIST_HEAD(&tb->owners);
@@ -51,6 +51,7 @@ void inet_bind_bucket_destroy(struct kmem_cache *cachep, struct inet_bind_bucket
 {
 	if (hlist_empty(&tb->owners)) {
 		__hlist_del(&tb->node);
+		release_net(tb->ib_net);
 		kmem_cache_free(cachep, tb);
 	}
 }
@@ -68,7 +69,7 @@ void inet_bind_hash(struct sock *sk, struct inet_bind_bucket *tb,
  */
 static void __inet_put_port(struct sock *sk)
 {
-	struct inet_hashinfo *hashinfo = sk->sk_prot->hashinfo;
+	struct inet_hashinfo *hashinfo = sk->sk_prot->h.hashinfo;
 	const int bhash = inet_bhashfn(inet_sk(sk)->num, hashinfo->bhash_size);
 	struct inet_bind_hashbucket *head = &hashinfo->bhash[bhash];
 	struct inet_bind_bucket *tb;
@@ -91,6 +92,22 @@ void inet_put_port(struct sock *sk)
 
 EXPORT_SYMBOL(inet_put_port);
 
+void __inet_inherit_port(struct sock *sk, struct sock *child)
+{
+	struct inet_hashinfo *table = sk->sk_prot->h.hashinfo;
+	const int bhash = inet_bhashfn(inet_sk(child)->num, table->bhash_size);
+	struct inet_bind_hashbucket *head = &table->bhash[bhash];
+	struct inet_bind_bucket *tb;
+
+	spin_lock(&head->lock);
+	tb = inet_csk(sk)->icsk_bind_hash;
+	sk_add_bind_node(child, &tb->owners);
+	inet_csk(child)->icsk_bind_hash = tb;
+	spin_unlock(&head->lock);
+}
+
+EXPORT_SYMBOL_GPL(__inet_inherit_port);
+
 /*
  * This lock without WQ_FLAG_EXCLUSIVE is good on UP and it can be very bad on SMP.
  * Look, when several writers sleep and reader wakes them up, all but one
@@ -139,7 +156,7 @@ static struct sock *inet_lookup_listener_slow(struct net *net,
 	sk_for_each(sk, node, head) {
 		const struct inet_sock *inet = inet_sk(sk);
 
-		if (sk->sk_net == net && inet->num == hnum &&
+		if (net_eq(sock_net(sk), net) && inet->num == hnum &&
 				!ipv6_only_sock(sk)) {
 			const __be32 rcv_saddr = inet->rcv_saddr;
 			int score = sk->sk_family == PF_INET ? 1 : 0;
@@ -182,7 +199,7 @@ struct sock *__inet_lookup_listener(struct net *net,
 		if (inet->num == hnum && !sk->sk_node.next &&
 		    (!inet->rcv_saddr || inet->rcv_saddr == daddr) &&
 		    (sk->sk_family == PF_INET || !ipv6_only_sock(sk)) &&
-		    !sk->sk_bound_dev_if && sk->sk_net == net)
+		    !sk->sk_bound_dev_if && net_eq(sock_net(sk), net))
 			goto sherry_cache;
 		sk = inet_lookup_listener_slow(net, head, daddr, hnum, dif);
 	}
@@ -254,7 +271,7 @@ static int __inet_check_established(struct inet_timewait_death_row *death_row,
 	struct sock *sk2;
 	const struct hlist_node *node;
 	struct inet_timewait_sock *tw;
-	struct net *net = sk->sk_net;
+	struct net *net = sock_net(sk);
 
 	prefetch(head->chain.first);
 	write_lock(lock);
@@ -288,7 +305,7 @@ unique:
 	sk->sk_hash = hash;
 	BUG_TRAP(sk_unhashed(sk));
 	__sk_add_node(sk, &head->chain);
-	sock_prot_inuse_add(sk->sk_prot, 1);
+	sock_prot_inuse_add(sock_net(sk), sk->sk_prot, 1);
 	write_unlock(lock);
 
 	if (twp) {
@@ -318,7 +335,7 @@ static inline u32 inet_sk_port_offset(const struct sock *sk)
 
 void __inet_hash_nolisten(struct sock *sk)
 {
-	struct inet_hashinfo *hashinfo = sk->sk_prot->hashinfo;
+	struct inet_hashinfo *hashinfo = sk->sk_prot->h.hashinfo;
 	struct hlist_head *list;
 	rwlock_t *lock;
 	struct inet_ehash_bucket *head;
@@ -332,14 +349,14 @@ void __inet_hash_nolisten(struct sock *sk)
 
 	write_lock(lock);
 	__sk_add_node(sk, list);
-	sock_prot_inuse_add(sk->sk_prot, 1);
+	sock_prot_inuse_add(sock_net(sk), sk->sk_prot, 1);
 	write_unlock(lock);
 }
 EXPORT_SYMBOL_GPL(__inet_hash_nolisten);
 
 static void __inet_hash(struct sock *sk)
 {
-	struct inet_hashinfo *hashinfo = sk->sk_prot->hashinfo;
+	struct inet_hashinfo *hashinfo = sk->sk_prot->h.hashinfo;
 	struct hlist_head *list;
 	rwlock_t *lock;
 
@@ -354,7 +371,7 @@ static void __inet_hash(struct sock *sk)
 
 	inet_listen_wlock(hashinfo);
 	__sk_add_node(sk, list);
-	sock_prot_inuse_add(sk->sk_prot, 1);
+	sock_prot_inuse_add(sock_net(sk), sk->sk_prot, 1);
 	write_unlock(lock);
 	wake_up(&hashinfo->lhash_wait);
 }
@@ -372,7 +389,7 @@ EXPORT_SYMBOL_GPL(inet_hash);
 void inet_unhash(struct sock *sk)
 {
 	rwlock_t *lock;
-	struct inet_hashinfo *hashinfo = sk->sk_prot->hashinfo;
+	struct inet_hashinfo *hashinfo = sk->sk_prot->h.hashinfo;
 
 	if (sk_unhashed(sk))
 		goto out;
@@ -387,7 +404,7 @@ void inet_unhash(struct sock *sk)
 	}
 
 	if (__sk_del_node_init(sk))
-		sock_prot_inuse_add(sk->sk_prot, -1);
+		sock_prot_inuse_add(sock_net(sk), sk->sk_prot, -1);
 	write_unlock_bh(lock);
 out:
 	if (sk->sk_state == TCP_LISTEN)
@@ -406,7 +423,7 @@ int __inet_hash_connect(struct inet_timewait_death_row *death_row,
 	struct inet_bind_hashbucket *head;
 	struct inet_bind_bucket *tb;
 	int ret;
-	struct net *net = sk->sk_net;
+	struct net *net = sock_net(sk);
 
 	if (!snum) {
 		int i, remaining, low, high, port;