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Commit 2536b94a authored by Ralf Baechle's avatar Ralf Baechle Committed by David S. Miller
Browse files

[ROSE]: Socket locking is a great invention. 



Especially if you actually try to do it ;-)

Signed-off-by: default avatarRalf Baechle <ralf@linux-mips.org>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 6cee77db

net/rose/af_rose.c

+50 −28
Original line number Diff line number Diff line
@@ -700,23 +700,7 @@ static int rose_connect(struct socket *sock, struct sockaddr *uaddr, int addr_le 
	unsigned char cause, diagnostic;

	struct net_device *dev;

	ax25_uid_assoc *user;

	int n;



	if (sk->sk_state == TCP_ESTABLISHED && sock->state == SS_CONNECTING) {

		sock->state = SS_CONNECTED;

		return 0;	/* Connect completed during a ERESTARTSYS event */

	}



	if (sk->sk_state == TCP_CLOSE && sock->state == SS_CONNECTING) {

		sock->state = SS_UNCONNECTED;

		return -ECONNREFUSED;

	}



	if (sk->sk_state == TCP_ESTABLISHED)

		return -EISCONN;	/* No reconnect on a seqpacket socket */



	sk->sk_state   = TCP_CLOSE;

	sock->state = SS_UNCONNECTED;

	int n, err = 0;



	if (addr_len != sizeof(struct sockaddr_rose) && addr_len != sizeof(struct full_sockaddr_rose))

		return -EINVAL;
@@ -734,24 +718,53 @@ static int rose_connect(struct socket *sock, struct sockaddr *uaddr, int addr_le 
	if ((rose->source_ndigis + addr->srose_ndigis) > ROSE_MAX_DIGIS)

		return -EINVAL;



	lock_sock(sk);



	if (sk->sk_state == TCP_ESTABLISHED && sock->state == SS_CONNECTING) {

		/* Connect completed during a ERESTARTSYS event */

		sock->state = SS_CONNECTED;

		goto out_release;

	}



	if (sk->sk_state == TCP_CLOSE && sock->state == SS_CONNECTING) {

		sock->state = SS_UNCONNECTED;

		err = -ECONNREFUSED;

		goto out_release;

	}



	if (sk->sk_state == TCP_ESTABLISHED) {

		/* No reconnect on a seqpacket socket */

		err = -EISCONN;

		goto out_release;

	}



	sk->sk_state   = TCP_CLOSE;

	sock->state = SS_UNCONNECTED;



	rose->neighbour = rose_get_neigh(&addr->srose_addr, &cause,

					 &diagnostic);

	if (!rose->neighbour)

		return -ENETUNREACH;



	rose->lci = rose_new_lci(rose->neighbour);

	if (!rose->lci)

		return -ENETUNREACH;

	if (!rose->lci) {

		err = -ENETUNREACH;

		goto out_release;

	}



	if (sock_flag(sk, SOCK_ZAPPED)) {	/* Must bind first - autobinding in this may or may not work */

		sock_reset_flag(sk, SOCK_ZAPPED);



		if ((dev = rose_dev_first()) == NULL)

			return -ENETUNREACH;

		if ((dev = rose_dev_first()) == NULL) {

			err = -ENETUNREACH;

			goto out_release;

		}



		user = ax25_findbyuid(current->euid);

		if (!user)

			return -EINVAL;

		if (!user) {

			err = -EINVAL;

			goto out_release;

		}



		memcpy(&rose->source_addr, dev->dev_addr, ROSE_ADDR_LEN);

		rose->source_call = user->call;
@@ -789,8 +802,10 @@ static int rose_connect(struct socket *sock, struct sockaddr *uaddr, int addr_le 
	rose_start_t1timer(sk);



	/* Now the loop */

	if (sk->sk_state != TCP_ESTABLISHED && (flags & O_NONBLOCK))

		return -EINPROGRESS;

	if (sk->sk_state != TCP_ESTABLISHED && (flags & O_NONBLOCK)) {

		err = -EINPROGRESS;

		goto out_release;

	}



	/*

	 * A Connect Ack with Choke or timeout or failed routing will go to
@@ -805,8 +820,10 @@ static int rose_connect(struct socket *sock, struct sockaddr *uaddr, int addr_le 
			set_current_state(TASK_INTERRUPTIBLE);

			if (sk->sk_state != TCP_SYN_SENT)

				break;

			release_sock(sk);

			if (!signal_pending(tsk)) {

				schedule();

				lock_sock(sk);

				continue;

			}

			current->state = TASK_RUNNING;
@@ -822,14 +839,19 @@ static int rose_connect(struct socket *sock, struct sockaddr *uaddr, int addr_le 
		rose->neighbour = rose_get_neigh(&addr->srose_addr, &cause, &diagnostic);

		if (rose->neighbour)

			goto rose_try_next_neigh;

	/* No more neighbour */



		/* No more neighbours */

		sock->state = SS_UNCONNECTED;

		return sock_error(sk);	/* Always set at this point */

		err = sock_error(sk);	/* Always set at this point */

		goto out_release;

	}



	sock->state = SS_CONNECTED;



	return 0;

out_release:

	release_sock(sk);



	return err;

}



static int rose_accept(struct socket *sock, struct socket *newsock, int flags)