#include <asm/system.h>
#include <asm/uaccess.h>
#include <linux/bitops.h>
+#include <linux/sched.h>
#include <linux/string.h>
#include <linux/mm.h>
#include <linux/interrupt.h>
#include <linux/rtnetlink.h>
#include <linux/if_arp.h>
#include <linux/if_slip.h>
+#include <linux/compat.h>
#include <linux/delay.h>
#include <linux/init.h>
+#include <linux/slab.h>
#include "slip.h"
#ifdef CONFIG_INET
#include <linux/ip.h>
skb_reset_mac_header(skb);
skb->protocol = htons(ETH_P_IP);
netif_rx(skb);
- sl->dev->last_rx = jiffies;
sl->rx_packets++;
}
/* Order of next two lines is *very* important.
* When we are sending a little amount of data,
- * the transfer may be completed inside driver.write()
+ * the transfer may be completed inside the ops->write()
* routine, because it's running with interrupts enabled.
* In this case we *never* got WRITE_WAKEUP event,
* if we did not request it before write operation.
* 14 Oct 1994 Dmitry Gorodchanin.
*/
- sl->tty->flags |= (1 << TTY_DO_WRITE_WAKEUP);
- actual = sl->tty->driver->write(sl->tty, sl->xbuff, count);
+ set_bit(TTY_DO_WRITE_WAKEUP, &sl->tty->flags);
+ actual = sl->tty->ops->write(sl->tty, sl->xbuff, count);
#ifdef SL_CHECK_TRANSMIT
sl->dev->trans_start = jiffies;
#endif
/* Now serial buffer is almost free & we can start
* transmission of another packet */
sl->tx_packets++;
- tty->flags &= ~(1 << TTY_DO_WRITE_WAKEUP);
+ clear_bit(TTY_DO_WRITE_WAKEUP, &tty->flags);
sl_unlock(sl);
return;
}
- actual = tty->driver->write(tty, sl->xhead, sl->xleft);
+ actual = tty->ops->write(tty, sl->xhead, sl->xleft);
sl->xleft -= actual;
sl->xhead += actual;
}
* 14 Oct 1994 Dmitry Gorodchanin.
*/
#ifdef SL_CHECK_TRANSMIT
- if (time_before(jiffies, dev->trans_start + 20 * HZ)) {
+ if (time_before(jiffies, dev_trans_start(dev) + 20 * HZ)) {
/* 20 sec timeout not reached */
goto out;
}
printk(KERN_WARNING "%s: transmit timed out, %s?\n",
dev->name,
- (sl->tty->driver->chars_in_buffer(sl->tty) || sl->xleft) ?
+ (tty_chars_in_buffer(sl->tty) || sl->xleft) ?
"bad line quality" : "driver error");
sl->xleft = 0;
- sl->tty->flags &= ~(1 << TTY_DO_WRITE_WAKEUP);
+ clear_bit(TTY_DO_WRITE_WAKEUP, &sl->tty->flags);
sl_unlock(sl);
#endif
}
/* Encapsulate an IP datagram and kick it into a TTY queue. */
-static int
+static netdev_tx_t
sl_xmit(struct sk_buff *skb, struct net_device *dev)
{
struct slip *sl = netdev_priv(dev);
spin_unlock(&sl->lock);
printk(KERN_WARNING "%s: xmit call when iface is down\n", dev->name);
dev_kfree_skb(skb);
- return 0;
+ return NETDEV_TX_OK;
}
if (sl->tty == NULL) {
spin_unlock(&sl->lock);
dev_kfree_skb(skb);
- return 0;
+ return NETDEV_TX_OK;
}
sl_lock(sl);
spin_unlock(&sl->lock);
dev_kfree_skb(skb);
- return 0;
+ return NETDEV_TX_OK;
}
struct slip *sl = netdev_priv(dev);
spin_lock_bh(&sl->lock);
- if (sl->tty) {
+ if (sl->tty)
/* TTY discipline is running. */
- sl->tty->flags &= ~(1 << TTY_DO_WRITE_WAKEUP);
- }
+ clear_bit(TTY_DO_WRITE_WAKEUP, &sl->tty->flags);
netif_stop_queue(dev);
sl->rcount = 0;
sl->xleft = 0;
dev->mtu = sl->mtu;
dev->type = ARPHRD_SLIP + sl->mode;
#ifdef SL_CHECK_TRANSMIT
- dev->tx_timeout = sl_tx_timeout;
dev->watchdog_timeo = 20*HZ;
#endif
return 0;
sl_free_bufs(sl);
}
-static void sl_setup(struct net_device *dev)
+/* Hook the destructor so we can free slip devices at the right point in time */
+static void sl_free_netdev(struct net_device *dev)
{
- dev->init = sl_init;
- dev->uninit = sl_uninit;
- dev->open = sl_open;
- dev->destructor = free_netdev;
- dev->stop = sl_close;
- dev->get_stats = sl_get_stats;
- dev->change_mtu = sl_change_mtu;
- dev->hard_start_xmit = sl_xmit;
+ int i = dev->base_addr;
+ free_netdev(dev);
+ slip_devs[i] = NULL;
+}
+
+static const struct net_device_ops sl_netdev_ops = {
+ .ndo_init = sl_init,
+ .ndo_uninit = sl_uninit,
+ .ndo_open = sl_open,
+ .ndo_stop = sl_close,
+ .ndo_start_xmit = sl_xmit,
+ .ndo_get_stats = sl_get_stats,
+ .ndo_change_mtu = sl_change_mtu,
+ .ndo_tx_timeout = sl_tx_timeout,
#ifdef CONFIG_SLIP_SMART
- dev->do_ioctl = sl_ioctl;
+ .ndo_do_ioctl = sl_ioctl,
#endif
+};
+
+
+static void sl_setup(struct net_device *dev)
+{
+ dev->netdev_ops = &sl_netdev_ops;
+ dev->destructor = sl_free_netdev;
+
dev->hard_header_len = 0;
dev->addr_len = 0;
dev->tx_queue_len = 10;
static struct slip *sl_alloc(dev_t line)
{
int i;
- int sel = -1;
- int score = -1;
struct net_device *dev = NULL;
struct slip *sl;
dev = slip_devs[i];
if (dev == NULL)
break;
-
- sl = netdev_priv(dev);
- if (sl->leased) {
- if (sl->line != line)
- continue;
- if (sl->tty)
- return NULL;
-
- /* Clear ESCAPE & ERROR flags */
- sl->flags &= (1 << SLF_INUSE);
- return sl;
- }
-
- if (sl->tty)
- continue;
-
- if (current->pid == sl->pid) {
- if (sl->line == line && score < 3) {
- sel = i;
- score = 3;
- continue;
- }
- if (score < 2) {
- sel = i;
- score = 2;
- }
- continue;
- }
- if (sl->line == line && score < 1) {
- sel = i;
- score = 1;
- continue;
- }
- if (score < 0) {
- sel = i;
- score = 0;
- }
- }
-
- if (sel >= 0) {
- i = sel;
- dev = slip_devs[i];
- if (score > 1) {
- sl = netdev_priv(dev);
- sl->flags &= (1 << SLF_INUSE);
- return sl;
- }
}
-
/* Sorry, too many, all slots in use */
if (i >= slip_maxdev)
return NULL;
if (!capable(CAP_NET_ADMIN))
return -EPERM;
+ if (tty->ops->write == NULL)
+ return -EOPNOTSUPP;
+
/* RTnetlink lock is misused here to serialize concurrent
opens of slip channels. There are better ways, but it is
the simplest one.
}
/*
-
- FIXME: 1,2 are fixed 3 was never true anyway.
-
- Let me to blame a bit.
- 1. TTY module calls this funstion on soft interrupt.
- 2. TTY module calls this function WITH MASKED INTERRUPTS!
- 3. TTY module does not notify us about line discipline
- shutdown,
-
- Seems, now it is clean. The solution is to consider netdevice and
- line discipline sides as two independent threads.
-
- By-product (not desired): sl? does not feel hangups and remains open.
- It is supposed, that user level program (dip, diald, slattach...)
- will catch SIGHUP and make the rest of work.
-
- I see no way to make more with current tty code. --ANK
- */
-
-/*
* Close down a SLIP channel.
* This means flushing out any pending queues, and then returning. This
* call is serialized against other ldisc functions.
+ *
+ * We also use this method fo a hangup event
*/
+
static void slip_close(struct tty_struct *tty)
{
struct slip *sl = tty->disc_data;
del_timer_sync(&sl->keepalive_timer);
del_timer_sync(&sl->outfill_timer);
#endif
-
- /* Count references from TTY module */
+ /* Flush network side */
+ unregister_netdev(sl->dev);
+ /* This will complete via sl_free_netdev */
}
+static int slip_hangup(struct tty_struct *tty)
+{
+ slip_close(tty);
+ return 0;
+}
/************************************************************************
* STANDARD SLIP ENCAPSULATION *
************************************************************************/
clear_bit(SLF_KEEPTEST, &sl->flags);
#endif
- if (!test_and_clear_bit(SLF_ERROR, &sl->flags)
- && (sl->rcount > 2))
+ if (!test_and_clear_bit(SLF_ERROR, &sl->flags) &&
+ (sl->rcount > 2))
sl_bump(sl);
clear_bit(SLF_ESCAPE, &sl->flags);
sl->rcount = 0;
clear_bit(SLF_KEEPTEST, &sl->flags);
#endif
- if (!test_and_clear_bit(SLF_ERROR, &sl->flags)
- && (sl->rcount > 2))
+ if (!test_and_clear_bit(SLF_ERROR, &sl->flags) &&
+ (sl->rcount > 2))
sl_bump(sl);
sl->rcount = 0;
sl->xbits = 0;
}
}
+#ifdef CONFIG_COMPAT
+static long slip_compat_ioctl(struct tty_struct *tty, struct file *file,
+ unsigned int cmd, unsigned long arg)
+{
+ switch (cmd) {
+ case SIOCGIFNAME:
+ case SIOCGIFENCAP:
+ case SIOCSIFENCAP:
+ case SIOCSIFHWADDR:
+ case SIOCSKEEPALIVE:
+ case SIOCGKEEPALIVE:
+ case SIOCSOUTFILL:
+ case SIOCGOUTFILL:
+ return slip_ioctl(tty, file, cmd,
+ (unsigned long)compat_ptr(arg));
+ }
+
+ return -ENOIOCTLCMD;
+}
+#endif
+
/* VSV changes start here */
#ifdef CONFIG_SLIP_SMART
/* function do_ioctl called from net/core/dev.c
case SIOCGLEASE:
*p = sl->leased;
- };
+ }
spin_unlock_bh(&sl->lock);
return 0;
}
#endif
/* VSV changes end */
-static struct tty_ldisc sl_ldisc = {
+static struct tty_ldisc_ops sl_ldisc = {
.owner = THIS_MODULE,
.magic = TTY_LDISC_MAGIC,
.name = "slip",
.open = slip_open,
.close = slip_close,
+ .hangup = slip_hangup,
.ioctl = slip_ioctl,
+#ifdef CONFIG_COMPAT
+ .compat_ioctl = slip_compat_ioctl,
+#endif
.receive_buf = slip_receive_buf,
.write_wakeup = slip_write_wakeup,
};
}
} while (busy && time_before(jiffies, timeout));
+ /* FIXME: hangup is async so we should wait when doing this second
+ phase */
for (i = 0; i < slip_maxdev; i++) {
dev = slip_devs[i];
/* put END into tty queue. Is it right ??? */
if (!netif_queue_stopped(sl->dev)) {
/* if device busy no outfill */
- sl->tty->driver->write(sl->tty, &s, 1);
+ sl->tty->ops->write(sl->tty, &s, 1);
}
} else
set_bit(SLF_OUTWAIT, &sl->flags);
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff