4 files changed, 60 insertions, 39 deletions

diff --git a/net/ipv4/inet_connection_sock.c b/net/ipv4/inet_connection_sock.c
index de5a41de191a..b189278c7bc1 100644
--- a/net/ipv4/inet_connection_sock.c
+++ b/net/ipv4/inet_connection_sock.c
@@ -78,11 +78,9 @@ EXPORT_SYMBOL_GPL(inet_csk_bind_conflict);
 /* Obtain a reference to a local port for the given sock,
  * if snum is zero it means select any available local port.
  */
-int inet_csk_get_port(struct inet_hashinfo *hashinfo,
-		      struct sock *sk, unsigned short snum,
-		      int (*bind_conflict)(const struct sock *sk,
-					   const struct inet_bind_bucket *tb))
+int inet_csk_get_port(struct sock *sk, unsigned short snum)
 {
+	struct inet_hashinfo *hashinfo = sk->sk_prot->hashinfo;
 	struct inet_bind_hashbucket *head;
 	struct hlist_node *node;
 	struct inet_bind_bucket *tb;
@@ -142,7 +140,7 @@ tb_found:
 			goto success;
 		} else {
 			ret = 1;
-			if (bind_conflict(sk, tb))
+			if (inet_csk(sk)->icsk_af_ops->bind_conflict(sk, tb))
 				goto fail_unlock;
 		}
 	}
diff --git a/net/ipv4/inet_hashtables.c b/net/ipv4/inet_hashtables.c
index 48d45008f749..90f422c9447b 100644
--- a/net/ipv4/inet_hashtables.c
+++ b/net/ipv4/inet_hashtables.c
@@ -66,8 +66,9 @@ void inet_bind_hash(struct sock *sk, struct inet_bind_bucket *tb,
 /*
  * Get rid of any references to a local port held by the given sock.
  */
-static void __inet_put_port(struct inet_hashinfo *hashinfo, struct sock *sk)
+static void __inet_put_port(struct sock *sk)
 {
+	struct inet_hashinfo *hashinfo = sk->sk_prot->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;
@@ -81,10 +82,10 @@ static void __inet_put_port(struct inet_hashinfo *hashinfo, struct sock *sk)
 	spin_unlock(&head->lock);
 }
 
-void inet_put_port(struct inet_hashinfo *hashinfo, struct sock *sk)
+void inet_put_port(struct sock *sk)
 {
 	local_bh_disable();
-	__inet_put_port(hashinfo, sk);
+	__inet_put_port(sk);
 	local_bh_enable();
 }
 
@@ -317,8 +318,9 @@ static inline u32 inet_sk_port_offset(const struct sock *sk)
 					  inet->dport);
 }
 
-void __inet_hash_nolisten(struct inet_hashinfo *hashinfo, struct sock *sk)
+void __inet_hash_nolisten(struct sock *sk)
 {
+	struct inet_hashinfo *hashinfo = sk->sk_prot->hashinfo;
 	struct hlist_head *list;
 	rwlock_t *lock;
 	struct inet_ehash_bucket *head;
@@ -337,13 +339,14 @@ void __inet_hash_nolisten(struct inet_hashinfo *hashinfo, struct sock *sk)
 }
 EXPORT_SYMBOL_GPL(__inet_hash_nolisten);
 
-void __inet_hash(struct inet_hashinfo *hashinfo, struct sock *sk)
+static void __inet_hash(struct sock *sk)
 {
+	struct inet_hashinfo *hashinfo = sk->sk_prot->hashinfo;
 	struct hlist_head *list;
 	rwlock_t *lock;
 
 	if (sk->sk_state != TCP_LISTEN) {
-		__inet_hash_nolisten(hashinfo, sk);
+		__inet_hash_nolisten(sk);
 		return;
 	}
 
@@ -357,13 +360,48 @@ void __inet_hash(struct inet_hashinfo *hashinfo, struct sock *sk)
 	write_unlock(lock);
 	wake_up(&hashinfo->lhash_wait);
 }
-EXPORT_SYMBOL_GPL(__inet_hash);
+
+void inet_hash(struct sock *sk)
+{
+	if (sk->sk_state != TCP_CLOSE) {
+		local_bh_disable();
+		__inet_hash(sk);
+		local_bh_enable();
+	}
+}
+EXPORT_SYMBOL_GPL(inet_hash);
+
+void inet_unhash(struct sock *sk)
+{
+	rwlock_t *lock;
+	struct inet_hashinfo *hashinfo = sk->sk_prot->hashinfo;
+
+	if (sk_unhashed(sk))
+		goto out;
+
+	if (sk->sk_state == TCP_LISTEN) {
+		local_bh_disable();
+		inet_listen_wlock(hashinfo);
+		lock = &hashinfo->lhash_lock;
+	} else {
+		lock = inet_ehash_lockp(hashinfo, sk->sk_hash);
+		write_lock_bh(lock);
+	}
+
+	if (__sk_del_node_init(sk))
+		sock_prot_inuse_add(sk->sk_prot, -1);
+	write_unlock_bh(lock);
+out:
+	if (sk->sk_state == TCP_LISTEN)
+		wake_up(&hashinfo->lhash_wait);
+}
+EXPORT_SYMBOL_GPL(inet_unhash);
 
 int __inet_hash_connect(struct inet_timewait_death_row *death_row,
 		struct sock *sk,
 		int (*check_established)(struct inet_timewait_death_row *,
 			struct sock *, __u16, struct inet_timewait_sock **),
-		void (*hash)(struct inet_hashinfo *, struct sock *))
+		void (*hash)(struct sock *sk))
 {
 	struct inet_hashinfo *hinfo = death_row->hashinfo;
 	const unsigned short snum = inet_sk(sk)->num;
@@ -427,7 +465,7 @@ ok:
 		inet_bind_hash(sk, tb, port);
 		if (sk_unhashed(sk)) {
 			inet_sk(sk)->sport = htons(port);
-			hash(hinfo, sk);
+			hash(sk);
 		}
 		spin_unlock(&head->lock);
 
@@ -444,7 +482,7 @@ ok:
 	tb  = inet_csk(sk)->icsk_bind_hash;
 	spin_lock_bh(&head->lock);
 	if (sk_head(&tb->owners) == sk && !sk->sk_bind_node.next) {
-		hash(hinfo, sk);
+		hash(sk);
 		spin_unlock_bh(&head->lock);
 		return 0;
 	} else {
diff --git a/net/ipv4/tcp.c b/net/ipv4/tcp.c
index a0d373bd9065..071e83a894ad 100644
--- a/net/ipv4/tcp.c
+++ b/net/ipv4/tcp.c
@@ -1669,7 +1669,7 @@ void tcp_set_state(struct sock *sk, int state)
 		sk->sk_prot->unhash(sk);
 		if (inet_csk(sk)->icsk_bind_hash &&
 		    !(sk->sk_userlocks & SOCK_BINDPORT_LOCK))
-			inet_put_port(&tcp_hashinfo, sk);
+			inet_put_port(sk);
 		/* fall through */
 	default:
 		if (oldstate==TCP_ESTABLISHED)
diff --git a/net/ipv4/tcp_ipv4.c b/net/ipv4/tcp_ipv4.c
index 77c1939a2b0d..63414ea427c5 100644
--- a/net/ipv4/tcp_ipv4.c
+++ b/net/ipv4/tcp_ipv4.c
@@ -108,22 +108,6 @@ struct inet_hashinfo __cacheline_aligned tcp_hashinfo = {
 	.lhash_wait  = __WAIT_QUEUE_HEAD_INITIALIZER(tcp_hashinfo.lhash_wait),
 };
 
-static int tcp_v4_get_port(struct sock *sk, unsigned short snum)
-{
-	return inet_csk_get_port(&tcp_hashinfo, sk, snum,
-				 inet_csk_bind_conflict);
-}
-
-static void tcp_v4_hash(struct sock *sk)
-{
-	inet_hash(&tcp_hashinfo, sk);
-}
-
-void tcp_unhash(struct sock *sk)
-{
-	inet_unhash(&tcp_hashinfo, sk);
-}
-
 static inline __u32 tcp_v4_init_sequence(struct sk_buff *skb)
 {
 	return secure_tcp_sequence_number(ip_hdr(skb)->daddr,
@@ -1478,8 +1462,8 @@ struct sock *tcp_v4_syn_recv_sock(struct sock *sk, struct sk_buff *skb,
 	}
 #endif
 
-	__inet_hash_nolisten(&tcp_hashinfo, newsk);
-	__inet_inherit_port(&tcp_hashinfo, sk, newsk);
+	__inet_hash_nolisten(newsk);
+	__inet_inherit_port(sk, newsk);
 
 	return newsk;
 
@@ -1827,6 +1811,7 @@ struct inet_connection_sock_af_ops ipv4_specific = {
 	.getsockopt	   = ip_getsockopt,
 	.addr2sockaddr	   = inet_csk_addr2sockaddr,
 	.sockaddr_len	   = sizeof(struct sockaddr_in),
+	.bind_conflict	   = inet_csk_bind_conflict,
 #ifdef CONFIG_COMPAT
 	.compat_setsockopt = compat_ip_setsockopt,
 	.compat_getsockopt = compat_ip_getsockopt,
@@ -1926,7 +1911,7 @@ int tcp_v4_destroy_sock(struct sock *sk)
 
 	/* Clean up a referenced TCP bind bucket. */
 	if (inet_csk(sk)->icsk_bind_hash)
-		inet_put_port(&tcp_hashinfo, sk);
+		inet_put_port(sk);
 
 	/*
 	 * If sendmsg cached page exists, toss it.
@@ -2435,9 +2420,9 @@ struct proto tcp_prot = {
 	.getsockopt		= tcp_getsockopt,
 	.recvmsg		= tcp_recvmsg,
 	.backlog_rcv		= tcp_v4_do_rcv,
-	.hash			= tcp_v4_hash,
-	.unhash			= tcp_unhash,
-	.get_port		= tcp_v4_get_port,
+	.hash			= inet_hash,
+	.unhash			= inet_unhash,
+	.get_port		= inet_csk_get_port,
 	.enter_memory_pressure	= tcp_enter_memory_pressure,
 	.sockets_allocated	= &tcp_sockets_allocated,
 	.orphan_count		= &tcp_orphan_count,
@@ -2450,6 +2435,7 @@ struct proto tcp_prot = {
 	.obj_size		= sizeof(struct tcp_sock),
 	.twsk_prot		= &tcp_timewait_sock_ops,
 	.rsk_prot		= &tcp_request_sock_ops,
+	.hashinfo		= &tcp_hashinfo,
 #ifdef CONFIG_COMPAT
 	.compat_setsockopt	= compat_tcp_setsockopt,
 	.compat_getsockopt	= compat_tcp_getsockopt,
@@ -2467,7 +2453,6 @@ void __init tcp_v4_init(struct net_proto_family *ops)
 EXPORT_SYMBOL(ipv4_specific);
 EXPORT_SYMBOL(tcp_hashinfo);
 EXPORT_SYMBOL(tcp_prot);
-EXPORT_SYMBOL(tcp_unhash);
 EXPORT_SYMBOL(tcp_v4_conn_request);
 EXPORT_SYMBOL(tcp_v4_connect);
 EXPORT_SYMBOL(tcp_v4_do_rcv);