[INET]: Consolidate inet(6)_hash_connect.

These two functions are the same except for what they call
to "check_established" and "hash" for a socket.

This saves half-a-kilo for ipv4 and ipv6.

 add/remove: 1/0 grow/shrink: 1/4 up/down: 582/-1128 (-546)
 function                                     old     new   delta
 __inet_hash_connect                            -     577    +577
 arp_ignore                                   108     113      +5
 static.hint                                    8       4      -4
 rt_worker_func                               376     372      -4
 inet6_hash_connect                           584      25    -559
 inet_hash_connect                            586      25    -561

Signed-off-by: Pavel Emelyanov <xemul@openvz.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 2 insertions, 91 deletions

diff --git a/net/ipv6/inet6_hashtables.c b/net/ipv6/inet6_hashtables.c
index 06b01befc90e..ece6d0ee2da5 100644
--- a/net/ipv6/inet6_hashtables.c
+++ b/net/ipv6/inet6_hashtables.c
@@ -233,97 +233,8 @@ 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)
 {
-	struct inet_hashinfo *hinfo = death_row->hashinfo;
-	const unsigned short snum = inet_sk(sk)->num;
-	struct inet_bind_hashbucket *head;
-	struct inet_bind_bucket *tb;
-	int ret;
-
-	if (snum == 0) {
-		int i, port, low, high, remaining;
-		static u32 hint;
-		const u32 offset = hint + inet6_sk_port_offset(sk);
-		struct hlist_node *node;
-		struct inet_timewait_sock *tw = NULL;
-
-		inet_get_local_port_range(&low, &high);
-		remaining = (high - low) + 1;
-
-		local_bh_disable();
-		for (i = 1; i <= remaining; i++) {
-			port = low + (i + offset) % remaining;
-			head = &hinfo->bhash[inet_bhashfn(port, hinfo->bhash_size)];
-			spin_lock(&head->lock);
-
-			/* Does not bother with rcv_saddr checks,
-			 * because the established check is already
-			 * unique enough.
-			 */
-			inet_bind_bucket_for_each(tb, node, &head->chain) {
-				if (tb->port == port) {
-					BUG_TRAP(!hlist_empty(&tb->owners));
-					if (tb->fastreuse >= 0)
-						goto next_port;
-					if (!__inet6_check_established(death_row,
-								       sk, port,
-								       &tw))
-						goto ok;
-					goto next_port;
-				}
-			}
-
-			tb = inet_bind_bucket_create(hinfo->bind_bucket_cachep,
-						     head, port);
-			if (!tb) {
-				spin_unlock(&head->lock);
-				break;
-			}
-			tb->fastreuse = -1;
-			goto ok;
-
-		next_port:
-			spin_unlock(&head->lock);
-		}
-		local_bh_enable();
-
-		return -EADDRNOTAVAIL;
-
-ok:
-		hint += i;
-
-		/* Head lock still held and bh's disabled */
-		inet_bind_hash(sk, tb, port);
-		if (sk_unhashed(sk)) {
-			inet_sk(sk)->sport = htons(port);
-			__inet6_hash(hinfo, sk);
-		}
-		spin_unlock(&head->lock);
-
-		if (tw) {
-			inet_twsk_deschedule(tw, death_row);
-			inet_twsk_put(tw);
-		}
-
-		ret = 0;
-		goto out;
-	}
-
-	head = &hinfo->bhash[inet_bhashfn(snum, hinfo->bhash_size)];
-	tb   = inet_csk(sk)->icsk_bind_hash;
-	spin_lock_bh(&head->lock);
-
-	if (sk_head(&tb->owners) == sk && sk->sk_bind_node.next == NULL) {
-		__inet6_hash(hinfo, sk);
-		spin_unlock_bh(&head->lock);
-		return 0;
-	} else {
-		spin_unlock(&head->lock);
-		/* No definite answer... Walk to established hash table */
-		ret = __inet6_check_established(death_row, sk, snum, NULL);
-out:
-		local_bh_enable();
-		return ret;
-	}
+	return __inet_hash_connect(death_row, sk,
+			__inet6_check_established, __inet6_hash);
 }
 
 EXPORT_SYMBOL_GPL(inet6_hash_connect);