1 files changed, 28 insertions, 24 deletions

diff --git a/drivers/net/tun.c b/drivers/net/tun.c
index 87214a257d2a..3f5d28851aa2 100644
--- a/drivers/net/tun.c
+++ b/drivers/net/tun.c
@@ -103,13 +103,10 @@ struct tun_struct {
         uid_t                   owner;
         gid_t                   group;
 
-        struct sk_buff_head     readq;
-
         struct net_device       *dev;
         struct fasync_struct    *fasync;
 
         struct tap_filter       txflt;
-        struct sock             *sk;
         struct socket           socket;
 
 #ifdef TUN_DEBUG
@@ -148,7 +145,7 @@ static int tun_attach(struct tun_struct *tun, struct file *file)
         tfile->tun = tun;
         tun->tfile = tfile;
         dev_hold(tun->dev);
-        sock_hold(tun->sk);
+        sock_hold(tun->socket.sk);
         atomic_inc(&tfile->count);
 
 out:
@@ -164,7 +161,7 @@ static void __tun_detach(struct tun_struct *tun)
         netif_tx_unlock_bh(tun->dev);
 
         /* Drop read queue */
-        skb_queue_purge(&tun->readq);
+        skb_queue_purge(&tun->socket.sk->sk_receive_queue);
 
         /* Drop the extra count on the net device */
         dev_put(tun->dev);
@@ -333,7 +330,7 @@ static void tun_free_netdev(struct net_device *dev)
 {
         struct tun_struct *tun = netdev_priv(dev);
 
-        sock_put(tun->sk);
+        sock_put(tun->socket.sk);
 }
 
 /* Net device open. */
@@ -351,7 +348,7 @@ static int tun_net_close(struct net_device *dev)
 }
 
 /* Net device start xmit */
-static int tun_net_xmit(struct sk_buff *skb, struct net_device *dev)
+static netdev_tx_t tun_net_xmit(struct sk_buff *skb, struct net_device *dev)
 {
         struct tun_struct *tun = netdev_priv(dev);
 
@@ -367,7 +364,7 @@ static int tun_net_xmit(struct sk_buff *skb, struct net_device *dev)
         if (!check_filter(&tun->txflt, skb))
                 goto drop;
 
-        if (skb_queue_len(&tun->readq) >= dev->tx_queue_len) {
+        if (skb_queue_len(&tun->socket.sk->sk_receive_queue) >= dev->tx_queue_len) {
                 if (!(tun->flags & TUN_ONE_QUEUE)) {
                         /* Normal queueing mode. */
                         /* Packet scheduler handles dropping of further packets. */
@@ -384,19 +381,19 @@ static int tun_net_xmit(struct sk_buff *skb, struct net_device *dev)
         }
 
         /* Enqueue packet */
-        skb_queue_tail(&tun->readq, skb);
+        skb_queue_tail(&tun->socket.sk->sk_receive_queue, skb);
         dev->trans_start = jiffies;
 
         /* Notify and wake up reader process */
         if (tun->flags & TUN_FASYNC)
                 kill_fasync(&tun->fasync, SIGIO, POLL_IN);
         wake_up_interruptible(&tun->socket.wait);
-        return 0;
+        return NETDEV_TX_OK;
 
 drop:
         dev->stats.tx_dropped++;
         kfree_skb(skb);
-        return 0;
+        return NETDEV_TX_OK;
 }
 
 static void tun_net_mclist(struct net_device *dev)
@@ -485,13 +482,13 @@ static unsigned int tun_chr_poll(struct file *file, poll_table * wait)
         if (!tun)
                 return POLLERR;
 
-        sk = tun->sk;
+        sk = tun->socket.sk;
 
         DBG(KERN_INFO "%s: tun_chr_poll\n", tun->dev->name);
 
         poll_wait(file, &tun->socket.wait, wait);
 
-        if (!skb_queue_empty(&tun->readq))
+        if (!skb_queue_empty(&sk->sk_receive_queue))
                 mask |= POLLIN | POLLRDNORM;
 
         if (sock_writeable(sk) ||
@@ -512,7 +509,7 @@ static inline struct sk_buff *tun_alloc_skb(struct tun_struct *tun,
                                             size_t prepad, size_t len,
                                             size_t linear, int noblock)
 {
-        struct sock *sk = tun->sk;
+        struct sock *sk = tun->socket.sk;
         struct sk_buff *skb;
         int err;
 
@@ -634,6 +631,9 @@ static __inline__ ssize_t tun_get_user(struct tun_struct *tun,
                 case VIRTIO_NET_HDR_GSO_TCPV6:
                         skb_shinfo(skb)->gso_type = SKB_GSO_TCPV6;
                         break;
+                case VIRTIO_NET_HDR_GSO_UDP:
+                        skb_shinfo(skb)->gso_type = SKB_GSO_UDP;
+                        break;
                 default:
                         tun->dev->stats.rx_frame_errors++;
                         kfree_skb(skb);
@@ -719,6 +719,8 @@ static __inline__ ssize_t tun_put_user(struct tun_struct *tun,
                                 gso.gso_type = VIRTIO_NET_HDR_GSO_TCPV4;
                         else if (sinfo->gso_type & SKB_GSO_TCPV6)
                                 gso.gso_type = VIRTIO_NET_HDR_GSO_TCPV6;
+                        else if (sinfo->gso_type & SKB_GSO_UDP)
+                                gso.gso_type = VIRTIO_NET_HDR_GSO_UDP;
                         else
                                 BUG();
                         if (sinfo->gso_type & SKB_GSO_TCP_ECN)
@@ -775,7 +777,7 @@ static ssize_t tun_chr_aio_read(struct kiocb *iocb, const struct iovec *iv,
                 current->state = TASK_INTERRUPTIBLE;
 
                 /* Read frames from the queue */
-                if (!(skb=skb_dequeue(&tun->readq))) {
+                if (!(skb=skb_dequeue(&tun->socket.sk->sk_receive_queue))) {
                         if (file->f_flags & O_NONBLOCK) {
                                 ret = -EAGAIN;
                                 break;
@@ -812,8 +814,6 @@ static void tun_setup(struct net_device *dev)
 {
         struct tun_struct *tun = netdev_priv(dev);
 
-        skb_queue_head_init(&tun->readq);
-
         tun->owner = -1;
         tun->group = -1;
 
@@ -934,7 +934,7 @@ static int tun_set_iff(struct net *net, struct file *file, struct ifreq *ifr)
                      (tun->group != -1 && !in_egroup_p(tun->group))) &&
                     !capable(CAP_NET_ADMIN))
                         return -EPERM;
-                err = security_tun_dev_attach(tun->sk);
+                err = security_tun_dev_attach(tun->socket.sk);
                 if (err < 0)
                         return err;
 
@@ -992,7 +992,6 @@ static int tun_set_iff(struct net *net, struct file *file, struct ifreq *ifr)
                 sk->sk_write_space = tun_sock_write_space;
                 sk->sk_sndbuf = INT_MAX;
 
-                tun->sk = sk;
                 container_of(sk, struct tun_sock, sk)->tun = tun;
 
                 security_tun_dev_post_create(sk);
@@ -1005,7 +1004,6 @@ static int tun_set_iff(struct net *net, struct file *file, struct ifreq *ifr)
                                 goto err_free_sk;
                 }
 
-                err = -EINVAL;
                 err = register_netdevice(tun->dev);
                 if (err < 0)
                         goto err_free_sk;
@@ -1077,7 +1075,8 @@ static int set_offload(struct net_device *dev, unsigned long arg)
         old_features = dev->features;
         /* Unset features, set them as we chew on the arg. */
         features = (old_features & ~(NETIF_F_HW_CSUM|NETIF_F_SG|NETIF_F_FRAGLIST
-                                    |NETIF_F_TSO_ECN|NETIF_F_TSO|NETIF_F_TSO6));
+                                    |NETIF_F_TSO_ECN|NETIF_F_TSO|NETIF_F_TSO6
+                                    |NETIF_F_UFO));
 
         if (arg & TUN_F_CSUM) {
                 features |= NETIF_F_HW_CSUM|NETIF_F_SG|NETIF_F_FRAGLIST;
@@ -1094,6 +1093,11 @@ static int set_offload(struct net_device *dev, unsigned long arg)
                                 features |= NETIF_F_TSO6;
                         arg &= ~(TUN_F_TSO4|TUN_F_TSO6);
                 }
+
+                if (arg & TUN_F_UFO) {
+                        features |= NETIF_F_UFO;
+                        arg &= ~TUN_F_UFO;
+                }
         }
 
         /* This gives the user a way to test for new features in future by
@@ -1247,7 +1251,7 @@ static long tun_chr_ioctl(struct file *file, unsigned int cmd,
                 break;
 
         case TUNGETSNDBUF:
-                sndbuf = tun->sk->sk_sndbuf;
+                sndbuf = tun->socket.sk->sk_sndbuf;
                 if (copy_to_user(argp, &sndbuf, sizeof(sndbuf)))
                         ret = -EFAULT;
                 break;
@@ -1258,7 +1262,7 @@ static long tun_chr_ioctl(struct file *file, unsigned int cmd,
                         break;
                 }
 
-                tun->sk->sk_sndbuf = sndbuf;
+                tun->socket.sk->sk_sndbuf = sndbuf;
                 break;
 
         default:
@@ -1341,7 +1345,7 @@ static int tun_chr_close(struct inode *inode, struct file *file)
 
         tun = tfile->tun;
         if (tun)
-                sock_put(tun->sk);
+                sock_put(tun->socket.sk);
 
         put_net(tfile->net);
         kfree(tfile);