[Devel] [PATCH][INET]: Fix accidentally broken inet(6)_hash_connect's port offset calculations.

[Pavel Emelyanov]

The port offset calculations depend on the protocol family, but,
as Adrian noticed, I broke this logic with the commit

	5ee31fc1ecdcbc234c8c56dcacef87c8e09909d8
	[INET]: Consolidate inet(6)_hash_connect.

Return this logic back, by passing the port offset directly into 
the consolidated function.

Signed-off-by: Pavel Emelyanov <xemul at openvz.org>
Noticed-by: Adrian Bunk <bunk at kernel.org>

---

diff --git a/include/net/inet_hashtables.h b/include/net/inet_hashtables.h
index 48ac620..97dc35a 100644
--- a/include/net/inet_hashtables.h
+++ b/include/net/inet_hashtables.h
@@ -389,7 +389,7 @@ static inline struct sock *inet_lookup(struct net *net,
 }
 
 extern int __inet_hash_connect(struct inet_timewait_death_row *death_row,
-		struct sock *sk,
+		struct sock *sk, u32 port_offset,
 		int (*check_established)(struct inet_timewait_death_row *,
 			struct sock *, __u16, struct inet_timewait_sock **),
 			       void (*hash)(struct sock *sk));
diff --git a/net/ipv4/inet_hashtables.c b/net/ipv4/inet_hashtables.c
index 90f422c..9cac6c0 100644
--- a/net/ipv4/inet_hashtables.c
+++ b/net/ipv4/inet_hashtables.c
@@ -398,7 +398,7 @@ out:
 EXPORT_SYMBOL_GPL(inet_unhash);
 
 int __inet_hash_connect(struct inet_timewait_death_row *death_row,
-		struct sock *sk,
+		struct sock *sk, u32 port_offset,
 		int (*check_established)(struct inet_timewait_death_row *,
 			struct sock *, __u16, struct inet_timewait_sock **),
 		void (*hash)(struct sock *sk))
@@ -413,7 +413,7 @@ int __inet_hash_connect(struct inet_timewait_death_row *death_row,
 	if (!snum) {
 		int i, remaining, low, high, port;
 		static u32 hint;
-		u32 offset = hint + inet_sk_port_offset(sk);
+		u32 offset = hint + port_offset;
 		struct hlist_node *node;
 		struct inet_timewait_sock *tw = NULL;
 
@@ -502,7 +502,7 @@ EXPORT_SYMBOL_GPL(__inet_hash_connect);
 int inet_hash_connect(struct inet_timewait_death_row *death_row,
 		      struct sock *sk)
 {
-	return __inet_hash_connect(death_row, sk,
+	return __inet_hash_connect(death_row, sk, inet_sk_port_offset(sk),
 			__inet_check_established, __inet_hash_nolisten);
 }
 
diff --git a/net/ipv6/inet6_hashtables.c b/net/ipv6/inet6_hashtables.c
index 43f3993..99fd25f 100644
--- a/net/ipv6/inet6_hashtables.c
+++ b/net/ipv6/inet6_hashtables.c
@@ -236,7 +236,7 @@ static inline u32 inet6_sk_port_offset(const struct sock *sk)
 int inet6_hash_connect(struct inet_timewait_death_row *death_row,
 		       struct sock *sk)
 {
-	return __inet_hash_connect(death_row, sk,
+	return __inet_hash_connect(death_row, sk, inet6_sk_port_offset(sk),
 			__inet6_check_established, __inet6_hash);
 }