void (*old_data_ready)(struct sock *, int);
void (*old_write_space)(struct sock *);
- struct net_device *net;
-
- struct sk_buff_head tx_queue;
- struct work_struct tx_work;
- spinlock_t tx_lock;
- unsigned tx_max;
+ struct net_device *dev;
};
static __be16 gprs_type_trans(struct sk_buff *skb)
return htons(0);
}
+static void gprs_writeable(struct gprs_dev *gp)
+{
+ struct net_device *dev = gp->dev;
+
+ if (pep_writeable(gp->sk))
+ netif_wake_queue(dev);
+}
+
/*
* Socket callbacks
*/
static void gprs_state_change(struct sock *sk)
{
- struct gprs_dev *dev = sk->sk_user_data;
+ struct gprs_dev *gp = sk->sk_user_data;
if (sk->sk_state == TCP_CLOSE_WAIT) {
- netif_stop_queue(dev->net);
- netif_carrier_off(dev->net);
+ struct net_device *dev = gp->dev;
+
+ netif_stop_queue(dev);
+ netif_carrier_off(dev);
}
}
-static int gprs_recv(struct gprs_dev *dev, struct sk_buff *skb)
+static int gprs_recv(struct gprs_dev *gp, struct sk_buff *skb)
{
- struct net_device *net = dev->net;
+ struct net_device *dev = gp->dev;
int err = 0;
__be16 protocol = gprs_type_trans(skb);
* so wrap the IP packet as a single fragment of an head-less
* socket buffer. The network stack will pull what it needs,
* but at least, the whole IP payload is not memcpy'd. */
- rskb = netdev_alloc_skb(net, 0);
+ rskb = netdev_alloc_skb(dev, 0);
if (!rskb) {
err = -ENOBUFS;
goto drop;
rskb->truesize += rskb->len;
/* Avoid nested fragments */
- for (fs = skb_shinfo(skb)->frag_list; fs; fs = fs->next)
+ skb_walk_frags(skb, fs)
flen += fs->len;
skb->next = skb_shinfo(skb)->frag_list;
- skb_shinfo(skb)->frag_list = NULL;
+ skb_frag_list_init(skb);
skb->len -= flen;
skb->data_len -= flen;
skb->truesize -= flen;
skb->protocol = protocol;
skb_reset_mac_header(skb);
- skb->dev = net;
+ skb->dev = dev;
- if (likely(net->flags & IFF_UP)) {
- net->stats.rx_packets++;
- net->stats.rx_bytes += skb->len;
+ if (likely(dev->flags & IFF_UP)) {
+ dev->stats.rx_packets++;
+ dev->stats.rx_bytes += skb->len;
netif_rx(skb);
skb = NULL;
} else
drop:
if (skb) {
dev_kfree_skb(skb);
- net->stats.rx_dropped++;
+ dev->stats.rx_dropped++;
}
return err;
}
static void gprs_data_ready(struct sock *sk, int len)
{
- struct gprs_dev *dev = sk->sk_user_data;
+ struct gprs_dev *gp = sk->sk_user_data;
struct sk_buff *skb;
while ((skb = pep_read(sk)) != NULL) {
skb_orphan(skb);
- gprs_recv(dev, skb);
+ gprs_recv(gp, skb);
}
}
static void gprs_write_space(struct sock *sk)
{
- struct gprs_dev *dev = sk->sk_user_data;
- unsigned credits = pep_writeable(sk);
-
- spin_lock_bh(&dev->tx_lock);
- dev->tx_max = credits;
- if (credits > skb_queue_len(&dev->tx_queue))
- netif_wake_queue(dev->net);
- spin_unlock_bh(&dev->tx_lock);
+ struct gprs_dev *gp = sk->sk_user_data;
+
+ if (netif_running(gp->dev))
+ gprs_writeable(gp);
}
/*
* Network device callbacks
*/
-static int gprs_xmit(struct sk_buff *skb, struct net_device *net)
+static int gprs_open(struct net_device *dev)
{
- struct gprs_dev *dev = netdev_priv(net);
+ struct gprs_dev *gp = netdev_priv(dev);
+
+ gprs_writeable(gp);
+ return 0;
+}
+
+static int gprs_close(struct net_device *dev)
+{
+ netif_stop_queue(dev);
+ return 0;
+}
+
+static netdev_tx_t gprs_xmit(struct sk_buff *skb, struct net_device *dev)
+{
+ struct gprs_dev *gp = netdev_priv(dev);
+ struct sock *sk = gp->sk;
+ int len, err;
switch (skb->protocol) {
case htons(ETH_P_IP):
break;
default:
dev_kfree_skb(skb);
- return 0;
- }
-
- spin_lock(&dev->tx_lock);
- if (likely(skb_queue_len(&dev->tx_queue) < dev->tx_max)) {
- skb_queue_tail(&dev->tx_queue, skb);
- skb = NULL;
+ return NETDEV_TX_OK;
}
- if (skb_queue_len(&dev->tx_queue) >= dev->tx_max)
- netif_stop_queue(net);
- spin_unlock(&dev->tx_lock);
- schedule_work(&dev->tx_work);
- if (unlikely(skb))
- dev_kfree_skb(skb);
- return 0;
-}
-
-static void gprs_tx(struct work_struct *work)
-{
- struct gprs_dev *dev = container_of(work, struct gprs_dev, tx_work);
- struct net_device *net = dev->net;
- struct sock *sk = dev->sk;
- struct sk_buff *skb;
-
- while ((skb = skb_dequeue(&dev->tx_queue)) != NULL) {
- int err;
-
- net->stats.tx_bytes += skb->len;
- net->stats.tx_packets++;
-
- skb_orphan(skb);
- skb_set_owner_w(skb, sk);
-
- lock_sock(sk);
- err = pep_write(sk, skb);
- if (err) {
- LIMIT_NETDEBUG(KERN_WARNING"%s: TX error (%d)\n",
- net->name, err);
- net->stats.tx_aborted_errors++;
- net->stats.tx_errors++;
- }
- release_sock(sk);
+ skb_orphan(skb);
+ skb_set_owner_w(skb, sk);
+ len = skb->len;
+ err = pep_write(sk, skb);
+ if (err) {
+ LIMIT_NETDEBUG(KERN_WARNING"%s: TX error (%d)\n",
+ dev->name, err);
+ dev->stats.tx_aborted_errors++;
+ dev->stats.tx_errors++;
+ } else {
+ dev->stats.tx_packets++;
+ dev->stats.tx_bytes += len;
}
- lock_sock(sk);
- gprs_write_space(sk);
- release_sock(sk);
+ netif_stop_queue(dev);
+ if (pep_writeable(sk))
+ netif_wake_queue(dev);
+ return NETDEV_TX_OK;
}
-static int gprs_set_mtu(struct net_device *net, int new_mtu)
+static int gprs_set_mtu(struct net_device *dev, int new_mtu)
{
if ((new_mtu < 576) || (new_mtu > (PHONET_MAX_MTU - 11)))
return -EINVAL;
- net->mtu = new_mtu;
+ dev->mtu = new_mtu;
return 0;
}
-static void gprs_setup(struct net_device *net)
+static const struct net_device_ops gprs_netdev_ops = {
+ .ndo_open = gprs_open,
+ .ndo_stop = gprs_close,
+ .ndo_start_xmit = gprs_xmit,
+ .ndo_change_mtu = gprs_set_mtu,
+};
+
+static void gprs_setup(struct net_device *dev)
{
- net->features = NETIF_F_FRAGLIST;
- net->type = ARPHRD_NONE;
- net->flags = IFF_POINTOPOINT | IFF_NOARP;
- net->mtu = GPRS_DEFAULT_MTU;
- net->hard_header_len = 0;
- net->addr_len = 0;
- net->tx_queue_len = 10;
-
- net->destructor = free_netdev;
- net->hard_start_xmit = gprs_xmit; /* mandatory */
- net->change_mtu = gprs_set_mtu;
+ dev->features = NETIF_F_FRAGLIST;
+ dev->type = ARPHRD_PHONET_PIPE;
+ dev->flags = IFF_POINTOPOINT | IFF_NOARP;
+ dev->mtu = GPRS_DEFAULT_MTU;
+ dev->hard_header_len = 0;
+ dev->addr_len = 0;
+ dev->tx_queue_len = 10;
+
+ dev->netdev_ops = &gprs_netdev_ops;
+ dev->destructor = free_netdev;
}
/*
int gprs_attach(struct sock *sk)
{
static const char ifname[] = "gprs%d";
- struct gprs_dev *dev;
- struct net_device *net;
+ struct gprs_dev *gp;
+ struct net_device *dev;
int err;
if (unlikely(sk->sk_type == SOCK_STREAM))
return -EINVAL; /* need packet boundaries */
/* Create net device */
- net = alloc_netdev(sizeof(*dev), ifname, gprs_setup);
- if (!net)
+ dev = alloc_netdev(sizeof(*gp), ifname, gprs_setup);
+ if (!dev)
return -ENOMEM;
- dev = netdev_priv(net);
- dev->net = net;
- dev->tx_max = 0;
- spin_lock_init(&dev->tx_lock);
- skb_queue_head_init(&dev->tx_queue);
- INIT_WORK(&dev->tx_work, gprs_tx);
-
- netif_stop_queue(net);
- err = register_netdev(net);
+ gp = netdev_priv(dev);
+ gp->sk = sk;
+ gp->dev = dev;
+
+ netif_stop_queue(dev);
+ err = register_netdev(dev);
if (err) {
- free_netdev(net);
+ free_netdev(dev);
return err;
}
err = -EINVAL;
goto out_rel;
}
- sk->sk_user_data = dev;
- dev->old_state_change = sk->sk_state_change;
- dev->old_data_ready = sk->sk_data_ready;
- dev->old_write_space = sk->sk_write_space;
+ sk->sk_user_data = gp;
+ gp->old_state_change = sk->sk_state_change;
+ gp->old_data_ready = sk->sk_data_ready;
+ gp->old_write_space = sk->sk_write_space;
sk->sk_state_change = gprs_state_change;
sk->sk_data_ready = gprs_data_ready;
sk->sk_write_space = gprs_write_space;
release_sock(sk);
-
sock_hold(sk);
- dev->sk = sk;
- printk(KERN_DEBUG"%s: attached\n", net->name);
- gprs_write_space(sk); /* kick off TX */
- return net->ifindex;
+ printk(KERN_DEBUG"%s: attached\n", dev->name);
+ return dev->ifindex;
out_rel:
release_sock(sk);
- unregister_netdev(net);
+ unregister_netdev(dev);
return err;
}
void gprs_detach(struct sock *sk)
{
- struct gprs_dev *dev = sk->sk_user_data;
- struct net_device *net = dev->net;
+ struct gprs_dev *gp = sk->sk_user_data;
+ struct net_device *dev = gp->dev;
lock_sock(sk);
sk->sk_user_data = NULL;
- sk->sk_state_change = dev->old_state_change;
- sk->sk_data_ready = dev->old_data_ready;
- sk->sk_write_space = dev->old_write_space;
+ sk->sk_state_change = gp->old_state_change;
+ sk->sk_data_ready = gp->old_data_ready;
+ sk->sk_write_space = gp->old_write_space;
release_sock(sk);
- printk(KERN_DEBUG"%s: detached\n", net->name);
- unregister_netdev(net);
- flush_scheduled_work();
+ printk(KERN_DEBUG"%s: detached\n", dev->name);
+ unregister_netdev(dev);
sock_put(sk);
- skb_queue_purge(&dev->tx_queue);
}
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff