X-Git-Url: https://git.karo-electronics.de/?p=mv-sheeva.git;a=blobdiff_plain;f=net%2Funix%2Faf_unix.c;fp=net%2Funix%2Faf_unix.c;h=437a99e560e1b5b2196b8734b0eabd0ae4ac75c7;hp=2268e6798124c9300cd4c10f5a65376898252210;hb=92d62d098f574ed70b26548e6a2e2f67025864dc;hpb=690c12d2c8ca50e55a3f507059c780ecdb8fd83f

diff --git a/net/unix/af_unix.c b/net/unix/af_unix.c
index 2268e679812..437a99e560e 100644
--- a/net/unix/af_unix.c
+++ b/net/unix/af_unix.c
@@ -316,7 +316,8 @@ static void unix_write_space(struct sock *sk)
 	if (unix_writable(sk)) {
 		wq = rcu_dereference(sk->sk_wq);
 		if (wq_has_sleeper(wq))
-			wake_up_interruptible_sync(&wq->wait);
+			wake_up_interruptible_sync_poll(&wq->wait,
+				POLLOUT | POLLWRNORM | POLLWRBAND);
 		sk_wake_async(sk, SOCK_WAKE_SPACE, POLL_OUT);
 	}
 	rcu_read_unlock();
@@ -1156,7 +1157,7 @@ restart:
 		goto restart;
 	}
 
-	err = security_unix_stream_connect(sock, other->sk_socket, newsk);
+	err = security_unix_stream_connect(sk, other, newsk);
 	if (err) {
 		unix_state_unlock(sk);
 		goto out_unlock;
@@ -1723,7 +1724,11 @@ static int unix_dgram_recvmsg(struct kiocb *iocb, struct socket *sock,
 
 	msg->msg_namelen = 0;
 
-	mutex_lock(&u->readlock);
+	err = mutex_lock_interruptible(&u->readlock);
+	if (err) {
+		err = sock_intr_errno(sock_rcvtimeo(sk, noblock));
+		goto out;
+	}
 
 	skb = skb_recv_datagram(sk, flags, noblock, &err);
 	if (!skb) {
@@ -1736,7 +1741,8 @@ static int unix_dgram_recvmsg(struct kiocb *iocb, struct socket *sock,
 		goto out_unlock;
 	}
 
-	wake_up_interruptible_sync(&u->peer_wait);
+	wake_up_interruptible_sync_poll(&u->peer_wait,
+					POLLOUT | POLLWRNORM | POLLWRBAND);
 
 	if (msg->msg_name)
 		unix_copy_addr(msg, skb->sk);
@@ -1862,7 +1868,11 @@ static int unix_stream_recvmsg(struct kiocb *iocb, struct socket *sock,
 		memset(&tmp_scm, 0, sizeof(tmp_scm));
 	}
 
-	mutex_lock(&u->readlock);
+	err = mutex_lock_interruptible(&u->readlock);
+	if (err) {
+		err = sock_intr_errno(timeo);
+		goto out;
+	}
 
 	do {
 		int chunk;
@@ -1893,11 +1903,12 @@ static int unix_stream_recvmsg(struct kiocb *iocb, struct socket *sock,
 
 			timeo = unix_stream_data_wait(sk, timeo);
 
-			if (signal_pending(current)) {
+			if (signal_pending(current)
+			    ||  mutex_lock_interruptible(&u->readlock)) {
 				err = sock_intr_errno(timeo);
 				goto out;
 			}
-			mutex_lock(&u->readlock);
+
 			continue;
  unlock:
 			unix_state_unlock(sk);
@@ -2099,13 +2110,12 @@ static unsigned int unix_dgram_poll(struct file *file, struct socket *sock,
 	if (sk->sk_err || !skb_queue_empty(&sk->sk_error_queue))
 		mask |= POLLERR;
 	if (sk->sk_shutdown & RCV_SHUTDOWN)
-		mask |= POLLRDHUP;
+		mask |= POLLRDHUP | POLLIN | POLLRDNORM;
 	if (sk->sk_shutdown == SHUTDOWN_MASK)
 		mask |= POLLHUP;
 
 	/* readable? */
-	if (!skb_queue_empty(&sk->sk_receive_queue) ||
-	    (sk->sk_shutdown & RCV_SHUTDOWN))
+	if (!skb_queue_empty(&sk->sk_receive_queue))
 		mask |= POLLIN | POLLRDNORM;
 
 	/* Connection-based need to check for termination and startup */
@@ -2117,20 +2127,19 @@ static unsigned int unix_dgram_poll(struct file *file, struct socket *sock,
 			return mask;
 	}
 
-	/* writable? */
-	writable = unix_writable(sk);
-	if (writable) {
-		other = unix_peer_get(sk);
-		if (other) {
-			if (unix_peer(other) != sk) {
-				sock_poll_wait(file, &unix_sk(other)->peer_wait,
-					  wait);
-				if (unix_recvq_full(other))
-					writable = 0;
-			}
+	/* No write status requested, avoid expensive OUT tests. */
+	if (wait && !(wait->key & (POLLWRBAND | POLLWRNORM | POLLOUT)))
+		return mask;
 
-			sock_put(other);
+	writable = unix_writable(sk);
+	other = unix_peer_get(sk);
+	if (other) {
+		if (unix_peer(other) != sk) {
+			sock_poll_wait(file, &unix_sk(other)->peer_wait, wait);
+			if (unix_recvq_full(other))
+				writable = 0;
 		}
+		sock_put(other);
 	}
 
 	if (writable)