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tun: reuse struct sock fields 

As tun always has an embeedded struct sock,
use sk and sk_receive_queue fields instead of
duplicating them in tun_struct.

Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Michael S. Tsirkin 2009-08-30 07:04:42 +00:00 committed by David S. Miller
parent 86393e52c3
commit 89f56d1e91
1 changed files with 12 additions and 18 deletions
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30
drivers/net/tun.c
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@ -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
@ -155,7 +152,7 @@ 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:
@ -171,7 +168,7 @@ 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);
@ -340,7 +337,7 @@ 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. */
@ -374,7 +371,7 @@ static netdev_tx_t 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. */
@ -391,7 +388,7 @@ static netdev_tx_t 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 */
@ -492,13 +489,13 @@ 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) ||
@ -519,7 +516,7 @@ 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;
@ -787,7 +784,7 @@ 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;
@ -824,8 +821,6 @@ 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;
@ -991,7 +986,6 @@ 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;
tun_net_init(dev);
@ -1249,7 +1243,7 @@ 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;
@ -1260,7 +1254,7 @@ 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:
@ -1343,7 +1337,7 @@ 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);