X-Git-Url: http://pilppa.org/gitweb/gitweb.cgi?a=blobdiff_plain;f=net%2Funix%2Faf_unix.c;h=fd11d4048b5223c1fe7b39e4dc66f82b0f988f67;hb=877ce7c1b3afd69a9b1caeb1b9964c992641f52a;hp=c323cc6a28b0e3f6042058879ead5dd9d5d36aaa;hpb=6a8a8e14bed179f2d415c7f4fee51233c35c10c3;p=linux-2.6-omap-h63xx.git

diff --git a/net/unix/af_unix.c b/net/unix/af_unix.c
index c323cc6a28b..fd11d4048b5 100644
--- a/net/unix/af_unix.c
+++ b/net/unix/af_unix.c
@@ -128,6 +128,30 @@ static atomic_t unix_nr_socks = ATOMIC_INIT(0);
 
 #define UNIX_ABSTRACT(sk)	(unix_sk(sk)->addr->hash != UNIX_HASH_SIZE)
 
+#ifdef CONFIG_SECURITY_NETWORK
+static void unix_get_peersec_dgram(struct sk_buff *skb)
+{
+	int err;
+
+	err = security_socket_getpeersec_dgram(skb, UNIXSECDATA(skb),
+					       UNIXSECLEN(skb));
+	if (err)
+		*(UNIXSECDATA(skb)) = NULL;
+}
+
+static inline void unix_set_secdata(struct scm_cookie *scm, struct sk_buff *skb)
+{
+	scm->secdata = *UNIXSECDATA(skb);
+	scm->seclen = *UNIXSECLEN(skb);
+}
+#else
+static void unix_get_peersec_dgram(struct sk_buff *skb)
+{ }
+
+static inline void unix_set_secdata(struct scm_cookie *scm, struct sk_buff *skb)
+{ }
+#endif /* CONFIG_SECURITY_NETWORK */
+
 /*
  *  SMP locking strategy:
  *    hash table is protected with spinlock unix_table_lock
@@ -566,7 +590,7 @@ static struct sock * unix_create1(struct socket *sock)
 	u->mnt	  = NULL;
 	spin_lock_init(&u->lock);
 	atomic_set(&u->inflight, sock ? 0 : -1);
-	init_MUTEX(&u->readsem); /* single task reading lock */
+	mutex_init(&u->readlock); /* single task reading lock */
 	init_waitqueue_head(&u->peer_wait);
 	unix_insert_socket(unix_sockets_unbound, sk);
 out:
@@ -623,7 +647,7 @@ static int unix_autobind(struct socket *sock)
 	struct unix_address * addr;
 	int err;
 
-	down(&u->readsem);
+	mutex_lock(&u->readlock);
 
 	err = 0;
 	if (u->addr)
@@ -661,7 +685,7 @@ retry:
 	spin_unlock(&unix_table_lock);
 	err = 0;
 
-out:	up(&u->readsem);
+out:	mutex_unlock(&u->readlock);
 	return err;
 }
 
@@ -744,7 +768,7 @@ static int unix_bind(struct socket *sock, struct sockaddr *uaddr, int addr_len)
 		goto out;
 	addr_len = err;
 
-	down(&u->readsem);
+	mutex_lock(&u->readlock);
 
 	err = -EINVAL;
 	if (u->addr)
@@ -816,7 +840,7 @@ static int unix_bind(struct socket *sock, struct sockaddr *uaddr, int addr_len)
 out_unlock:
 	spin_unlock(&unix_table_lock);
 out_up:
-	up(&u->readsem);
+	mutex_unlock(&u->readlock);
 out:
 	return err;
 
@@ -1291,6 +1315,8 @@ static int unix_dgram_sendmsg(struct kiocb *kiocb, struct socket *sock,
 	if (siocb->scm->fp)
 		unix_attach_fds(siocb->scm, skb);
 
+	unix_get_peersec_dgram(skb);
+
 	skb->h.raw = skb->data;
 	err = memcpy_fromiovec(skb_put(skb,len), msg->msg_iov, len);
 	if (err)
@@ -1427,15 +1453,15 @@ static int unix_stream_sendmsg(struct kiocb *kiocb, struct socket *sock,
 	while(sent < len)
 	{
 		/*
-		 *	Optimisation for the fact that under 0.01% of X messages typically
-		 *	need breaking up.
+		 *	Optimisation for the fact that under 0.01% of X
+		 *	messages typically need breaking up.
 		 */
 
-		size=len-sent;
+		size = len-sent;
 
 		/* Keep two messages in the pipe so it schedules better */
-		if (size > sk->sk_sndbuf / 2 - 64)
-			size = sk->sk_sndbuf / 2 - 64;
+		if (size > ((sk->sk_sndbuf >> 1) - 64))
+			size = (sk->sk_sndbuf >> 1) - 64;
 
 		if (size > SKB_MAX_ALLOC)
 			size = SKB_MAX_ALLOC;
@@ -1545,7 +1571,7 @@ static int unix_dgram_recvmsg(struct kiocb *iocb, struct socket *sock,
 
 	msg->msg_namelen = 0;
 
-	down(&u->readsem);
+	mutex_lock(&u->readlock);
 
 	skb = skb_recv_datagram(sk, flags, noblock, &err);
 	if (!skb)
@@ -1570,6 +1596,7 @@ static int unix_dgram_recvmsg(struct kiocb *iocb, struct socket *sock,
 		memset(&tmp_scm, 0, sizeof(tmp_scm));
 	}
 	siocb->scm->creds = *UNIXCREDS(skb);
+	unix_set_secdata(siocb->scm, skb);
 
 	if (!(flags & MSG_PEEK))
 	{
@@ -1600,7 +1627,7 @@ static int unix_dgram_recvmsg(struct kiocb *iocb, struct socket *sock,
 out_free:
 	skb_free_datagram(sk,skb);
 out_unlock:
-	up(&u->readsem);
+	mutex_unlock(&u->readlock);
 out:
 	return err;
 }
@@ -1676,7 +1703,7 @@ static int unix_stream_recvmsg(struct kiocb *iocb, struct socket *sock,
 		memset(&tmp_scm, 0, sizeof(tmp_scm));
 	}
 
-	down(&u->readsem);
+	mutex_lock(&u->readlock);
 
 	do
 	{
@@ -1700,7 +1727,7 @@ static int unix_stream_recvmsg(struct kiocb *iocb, struct socket *sock,
 			err = -EAGAIN;
 			if (!timeo)
 				break;
-			up(&u->readsem);
+			mutex_unlock(&u->readlock);
 
 			timeo = unix_stream_data_wait(sk, timeo);
 
@@ -1708,7 +1735,7 @@ static int unix_stream_recvmsg(struct kiocb *iocb, struct socket *sock,
 				err = sock_intr_errno(timeo);
 				goto out;
 			}
-			down(&u->readsem);
+			mutex_lock(&u->readlock);
 			continue;
 		}
 
@@ -1774,7 +1801,7 @@ static int unix_stream_recvmsg(struct kiocb *iocb, struct socket *sock,
 		}
 	} while (size);
 
-	up(&u->readsem);
+	mutex_unlock(&u->readlock);
 	scm_recv(sock, msg, siocb->scm, flags);
 out:
 	return copied ? : err;
@@ -1878,6 +1905,8 @@ static unsigned int unix_poll(struct file * file, struct socket *sock, poll_tabl
 		mask |= POLLERR;
 	if (sk->sk_shutdown == SHUTDOWN_MASK)
 		mask |= POLLHUP;
+	if (sk->sk_shutdown & RCV_SHUTDOWN)
+		mask |= POLLRDHUP;
 
 	/* readable? */
 	if (!skb_queue_empty(&sk->sk_receive_queue) ||