1 files changed, 26 insertions, 13 deletions

diff --git a/net/unix/af_unix.c b/net/unix/af_unix.c
index 4414a18c63b..3c95304a081 100644
--- a/net/unix/af_unix.c
+++ b/net/unix/af_unix.c
@@ -117,7 +117,7 @@
 
 static struct hlist_head unix_socket_table[UNIX_HASH_SIZE + 1];
 static DEFINE_SPINLOCK(unix_table_lock);
-static atomic_t unix_nr_socks = ATOMIC_INIT(0);
+static atomic_long_t unix_nr_socks;
 
 #define unix_sockets_unbound    (&unix_socket_table[UNIX_HASH_SIZE])
 
@@ -360,13 +360,13 @@ static void unix_sock_destructor(struct sock *sk)
         if (u->addr)
                 unix_release_addr(u->addr);
 
-        atomic_dec(&unix_nr_socks);
+        atomic_long_dec(&unix_nr_socks);
         local_bh_disable();
         sock_prot_inuse_add(sock_net(sk), sk->sk_prot, -1);
         local_bh_enable();
 #ifdef UNIX_REFCNT_DEBUG
-        printk(KERN_DEBUG "UNIX %p is destroyed, %d are still alive.\n", sk,
-                atomic_read(&unix_nr_socks));
+        printk(KERN_DEBUG "UNIX %p is destroyed, %ld are still alive.\n", sk,
+                atomic_long_read(&unix_nr_socks));
 #endif
 }
 
@@ -606,8 +606,8 @@ static struct sock *unix_create1(struct net *net, struct socket *sock)
         struct sock *sk = NULL;
         struct unix_sock *u;
 
-        atomic_inc(&unix_nr_socks);
-        if (atomic_read(&unix_nr_socks) > 2 * get_max_files())
+        atomic_long_inc(&unix_nr_socks);
+        if (atomic_long_read(&unix_nr_socks) > 2 * get_max_files())
                 goto out;
 
         sk = sk_alloc(net, PF_UNIX, GFP_KERNEL, &unix_proto);
@@ -632,7 +632,7 @@ static struct sock *unix_create1(struct net *net, struct socket *sock)
         unix_insert_socket(unix_sockets_unbound, sk);
 out:
         if (sk == NULL)
-                atomic_dec(&unix_nr_socks);
+                atomic_long_dec(&unix_nr_socks);
         else {
                 local_bh_disable();
                 sock_prot_inuse_add(sock_net(sk), sk->sk_prot, 1);
@@ -692,6 +692,7 @@ static int unix_autobind(struct socket *sock)
         static u32 ordernum = 1;
         struct unix_address *addr;
         int err;
+        unsigned int retries = 0;
 
         mutex_lock(&u->readlock);
 
@@ -717,9 +718,17 @@ retry:
         if (__unix_find_socket_byname(net, addr->name, addr->len, sock->type,
                                       addr->hash)) {
                 spin_unlock(&unix_table_lock);
-                /* Sanity yield. It is unusual case, but yet... */
-                if (!(ordernum&0xFF))
-                        yield();
+                /*
+                 * __unix_find_socket_byname() may take long time if many names
+                 * are already in use.
+                 */
+                cond_resched();
+                /* Give up if all names seems to be in use. */
+                if (retries++ == 0xFFFFF) {
+                        err = -ENOSPC;
+                        kfree(addr);
+                        goto out;
+                }
                 goto retry;
         }
         addr->hash ^= sk->sk_type;
@@ -1502,6 +1511,8 @@ restart:
                 goto restart;
         }
 
+        if (sock_flag(other, SOCK_RCVTSTAMP))
+                __net_timestamp(skb);
         skb_queue_tail(&other->sk_receive_queue, skb);
         unix_state_unlock(other);
         other->sk_data_ready(other, len);
@@ -1713,6 +1724,9 @@ static int unix_dgram_recvmsg(struct kiocb *iocb, struct socket *sock,
         if (err)
                 goto out_free;
 
+        if (sock_flag(sk, SOCK_RCVTSTAMP))
+                __sock_recv_timestamp(msg, sk, skb);
+
         if (!siocb->scm) {
                 siocb->scm = &tmp_scm;
                 memset(&tmp_scm, 0, sizeof(tmp_scm));
@@ -2024,11 +2038,10 @@ static unsigned int unix_poll(struct file *file, struct socket *sock, poll_table
         if (sk->sk_shutdown == SHUTDOWN_MASK)
                 mask |= POLLHUP;
         if (sk->sk_shutdown & RCV_SHUTDOWN)
-                mask |= POLLRDHUP;
+                mask |= POLLRDHUP | POLLIN | POLLRDNORM;
 
         /* 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 */