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Diffstat (limited to 'net/ipv4/tcp.c')
-rw-r--r--net/ipv4/tcp.c93
1 files changed, 0 insertions, 93 deletions
diff --git a/net/ipv4/tcp.c b/net/ipv4/tcp.c
index 8177b86570d..581016a6a93 100644
--- a/net/ipv4/tcp.c
+++ b/net/ipv4/tcp.c
@@ -1805,98 +1805,6 @@ int tcp_disconnect(struct sock *sk, int flags)
}
/*
- * Wait for an incoming connection, avoid race
- * conditions. This must be called with the socket locked.
- */
-static int wait_for_connect(struct sock *sk, long timeo)
-{
- struct inet_connection_sock *icsk = inet_csk(sk);
- DEFINE_WAIT(wait);
- int err;
-
- /*
- * True wake-one mechanism for incoming connections: only
- * one process gets woken up, not the 'whole herd'.
- * Since we do not 'race & poll' for established sockets
- * anymore, the common case will execute the loop only once.
- *
- * Subtle issue: "add_wait_queue_exclusive()" will be added
- * after any current non-exclusive waiters, and we know that
- * it will always _stay_ after any new non-exclusive waiters
- * because all non-exclusive waiters are added at the
- * beginning of the wait-queue. As such, it's ok to "drop"
- * our exclusiveness temporarily when we get woken up without
- * having to remove and re-insert us on the wait queue.
- */
- for (;;) {
- prepare_to_wait_exclusive(sk->sk_sleep, &wait,
- TASK_INTERRUPTIBLE);
- release_sock(sk);
- if (reqsk_queue_empty(&icsk->icsk_accept_queue))
- timeo = schedule_timeout(timeo);
- lock_sock(sk);
- err = 0;
- if (!reqsk_queue_empty(&icsk->icsk_accept_queue))
- break;
- err = -EINVAL;
- if (sk->sk_state != TCP_LISTEN)
- break;
- err = sock_intr_errno(timeo);
- if (signal_pending(current))
- break;
- err = -EAGAIN;
- if (!timeo)
- break;
- }
- finish_wait(sk->sk_sleep, &wait);
- return err;
-}
-
-/*
- * This will accept the next outstanding connection.
- */
-
-struct sock *inet_csk_accept(struct sock *sk, int flags, int *err)
-{
- struct inet_connection_sock *icsk = inet_csk(sk);
- struct sock *newsk;
- int error;
-
- lock_sock(sk);
-
- /* We need to make sure that this socket is listening,
- * and that it has something pending.
- */
- error = -EINVAL;
- if (sk->sk_state != TCP_LISTEN)
- goto out_err;
-
- /* Find already established connection */
- if (reqsk_queue_empty(&icsk->icsk_accept_queue)) {
- long timeo = sock_rcvtimeo(sk, flags & O_NONBLOCK);
-
- /* If this is a non blocking socket don't sleep */
- error = -EAGAIN;
- if (!timeo)
- goto out_err;
-
- error = wait_for_connect(sk, timeo);
- if (error)
- goto out_err;
- }
-
- newsk = reqsk_queue_get_child(&icsk->icsk_accept_queue, sk);
- BUG_TRAP(newsk->sk_state != TCP_SYN_RECV);
-out:
- release_sock(sk);
- return newsk;
-out_err:
- newsk = NULL;
- *err = error;
- goto out;
-}
-
-/*
* Socket option code for TCP.
*/
int tcp_setsockopt(struct sock *sk, int level, int optname, char __user *optval,
@@ -2344,7 +2252,6 @@ void __init tcp_init(void)
tcp_register_congestion_control(&tcp_reno);
}
-EXPORT_SYMBOL(inet_csk_accept);
EXPORT_SYMBOL(tcp_close);
EXPORT_SYMBOL(tcp_destroy_sock);
EXPORT_SYMBOL(tcp_disconnect);