Revert "tcp: bind() fix when many ports are bound"

This reverts two commits:

fda48a0d
tcp: bind() fix when many ports are bound

and a follow-on fix for it:

6443bb1f
ipv6: Fix inet6_csk_bind_conflict()

It causes problems with binding listening sockets when time-wait
sockets from a previous instance still are alive.

It's too late to keep fiddling with this so late in the -rc
series, and we'll deal with it in net-next-2.6 instead.
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

net/ipv4/inet_connection_sock.c

@@ -70,17 +70,13 @@ int inet_csk_bind_conflict(const struct sock *sk,
 		    (!sk->sk_bound_dev_if ||
 		     !sk2->sk_bound_dev_if ||
 		     sk->sk_bound_dev_if == sk2->sk_bound_dev_if)) {
-			const __be32 sk2_rcv_saddr = inet_rcv_saddr(sk2);
-
 			if (!reuse || !sk2->sk_reuse ||
 			    sk2->sk_state == TCP_LISTEN) {
+				const __be32 sk2_rcv_saddr = inet_rcv_saddr(sk2);
 				if (!sk2_rcv_saddr || !sk_rcv_saddr ||
 				    sk2_rcv_saddr == sk_rcv_saddr)
 					break;
-			} else if (reuse && sk2->sk_reuse &&
-				   sk2_rcv_saddr &&
-				   sk2_rcv_saddr == sk_rcv_saddr)
-				break;
+			}
 		}
 	}
 	return node != NULL;
@@ -124,13 +120,11 @@ int inet_csk_get_port(struct sock *sk, unsigned short snum)
 						smallest_size = tb->num_owners;
 						smallest_rover = rover;
 						if (atomic_read(&hashinfo->bsockets) > (high - low) + 1) {
-							if (!inet_csk(sk)->icsk_af_ops->bind_conflict(sk, tb)) {
 							spin_unlock(&head->lock);
 							snum = smallest_rover;
 							goto have_snum;
 						}
 					}
-					}
 					goto next;
 				}
 			break;

net/ipv6/inet6_connection_sock.c

@@ -42,16 +42,11 @@ int inet6_csk_bind_conflict(const struct sock *sk,
 		if (sk != sk2 &&
 		    (!sk->sk_bound_dev_if ||
 		     !sk2->sk_bound_dev_if ||
-		     sk->sk_bound_dev_if == sk2->sk_bound_dev_if)) {
-			if ((!sk->sk_reuse || !sk2->sk_reuse ||
+		     sk->sk_bound_dev_if == sk2->sk_bound_dev_if) &&
+		    (!sk->sk_reuse || !sk2->sk_reuse ||
 		     sk2->sk_state == TCP_LISTEN) &&
 		     ipv6_rcv_saddr_equal(sk, sk2))
 			break;
-			else if (sk->sk_reuse && sk2->sk_reuse &&
-				!ipv6_addr_any(inet6_rcv_saddr(sk)) &&
-				ipv6_rcv_saddr_equal(sk, sk2))
-				break;
-		}
 	}
 
 	return node != NULL;