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path: root/drivers/net/wan/x25_asy.c
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Diffstat (limited to 'drivers/net/wan/x25_asy.c')
-rw-r--r--drivers/net/wan/x25_asy.c216
1 files changed, 113 insertions, 103 deletions
diff --git a/drivers/net/wan/x25_asy.c b/drivers/net/wan/x25_asy.c
index 2a6c7a60756..fa9fdfa128c 100644
--- a/drivers/net/wan/x25_asy.c
+++ b/drivers/net/wan/x25_asy.c
@@ -14,9 +14,10 @@
* 2000-10-29 Henner Eisen lapb_data_indication() return status.
*/
+#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
+
#include <linux/module.h>
-#include <asm/system.h>
#include <linux/uaccess.h>
#include <linux/bitops.h>
#include <linux/string.h>
@@ -29,13 +30,13 @@
#include <linux/etherdevice.h>
#include <linux/skbuff.h>
#include <linux/if_arp.h>
-#include <linux/x25.h>
#include <linux/lapb.h>
#include <linux/init.h>
#include <linux/rtnetlink.h>
-#include "x25_asy.h"
-
+#include <linux/compat.h>
+#include <linux/slab.h>
#include <net/x25device.h>
+#include "x25_asy.h"
static struct net_device **x25_asy_devs;
static int x25_asy_maxdev = SL_NRUNIT;
@@ -64,7 +65,7 @@ static struct x25_asy *x25_asy_alloc(void)
if (dev == NULL)
break;
- sl = dev->priv;
+ sl = netdev_priv(dev);
/* Not in use ? */
if (!test_and_set_bit(SLF_INUSE, &sl->flags))
return sl;
@@ -86,7 +87,7 @@ static struct x25_asy *x25_asy_alloc(void)
return NULL;
/* Initialize channel control data */
- sl = dev->priv;
+ sl = netdev_priv(dev);
dev->base_addr = i;
/* register device so that it can be ifconfig'ed */
@@ -96,7 +97,7 @@ static struct x25_asy *x25_asy_alloc(void)
x25_asy_devs[i] = dev;
return sl;
} else {
- printk(KERN_WARNING "x25_asy_alloc() - register_netdev() failure.\n");
+ pr_warn("%s(): register_netdev() failure\n", __func__);
free_netdev(dev);
}
}
@@ -114,22 +115,23 @@ static void x25_asy_free(struct x25_asy *sl)
sl->xbuff = NULL;
if (!test_and_clear_bit(SLF_INUSE, &sl->flags))
- printk(KERN_ERR "%s: x25_asy_free for already free unit.\n",
- sl->dev->name);
+ netdev_err(sl->dev, "x25_asy_free for already free unit\n");
}
static int x25_asy_change_mtu(struct net_device *dev, int newmtu)
{
- struct x25_asy *sl = dev->priv;
+ struct x25_asy *sl = netdev_priv(dev);
unsigned char *xbuff, *rbuff;
- int len = 2 * newmtu;
+ int len;
+ if (newmtu > 65534)
+ return -EINVAL;
+
+ len = 2 * newmtu;
xbuff = kmalloc(len + 4, GFP_ATOMIC);
rbuff = kmalloc(len + 4, GFP_ATOMIC);
if (xbuff == NULL || rbuff == NULL) {
- printk(KERN_WARNING "%s: unable to grow X.25 buffers, MTU change cancelled.\n",
- dev->name);
kfree(xbuff);
kfree(rbuff);
return -ENOMEM;
@@ -142,7 +144,7 @@ static int x25_asy_change_mtu(struct net_device *dev, int newmtu)
memcpy(sl->xbuff, sl->xhead, sl->xleft);
} else {
sl->xleft = 0;
- sl->stats.tx_dropped++;
+ dev->stats.tx_dropped++;
}
}
sl->xhead = sl->xbuff;
@@ -153,7 +155,7 @@ static int x25_asy_change_mtu(struct net_device *dev, int newmtu)
memcpy(sl->rbuff, rbuff, sl->rcount);
} else {
sl->rcount = 0;
- sl->stats.rx_over_errors++;
+ dev->stats.rx_over_errors++;
set_bit(SLF_ERROR, &sl->flags);
}
}
@@ -188,18 +190,18 @@ static inline void x25_asy_unlock(struct x25_asy *sl)
static void x25_asy_bump(struct x25_asy *sl)
{
+ struct net_device *dev = sl->dev;
struct sk_buff *skb;
int count;
int err;
count = sl->rcount;
- sl->stats.rx_bytes += count;
+ dev->stats.rx_bytes += count;
skb = dev_alloc_skb(count+1);
if (skb == NULL) {
- printk(KERN_WARNING "%s: memory squeeze, dropping packet.\n",
- sl->dev->name);
- sl->stats.rx_dropped++;
+ netdev_warn(sl->dev, "memory squeeze, dropping packet\n");
+ dev->stats.rx_dropped++;
return;
}
skb_push(skb, 1); /* LAPB internal control */
@@ -211,8 +213,7 @@ static void x25_asy_bump(struct x25_asy *sl)
printk(KERN_DEBUG "x25_asy: data received err - %d\n", err);
} else {
netif_rx(skb);
- sl->dev->last_rx = jiffies;
- sl->stats.rx_packets++;
+ dev->stats.rx_packets++;
}
}
@@ -227,13 +228,13 @@ static void x25_asy_encaps(struct x25_asy *sl, unsigned char *icp, int len)
len = mtu;
printk(KERN_DEBUG "%s: truncating oversized transmit packet!\n",
sl->dev->name);
- sl->stats.tx_dropped++;
+ sl->dev->stats.tx_dropped++;
x25_asy_unlock(sl);
return;
}
p = icp;
- count = x25_asy_esc(p, (unsigned char *) sl->xbuff, len);
+ count = x25_asy_esc(p, sl->xbuff, len);
/* Order of next two lines is *very* important.
* When we are sending a little amount of data,
@@ -243,7 +244,7 @@ static void x25_asy_encaps(struct x25_asy *sl, unsigned char *icp, int len)
* if we did not request it before write operation.
* 14 Oct 1994 Dmitry Gorodchanin.
*/
- sl->tty->flags |= (1 << TTY_DO_WRITE_WAKEUP);
+ set_bit(TTY_DO_WRITE_WAKEUP, &sl->tty->flags);
actual = sl->tty->ops->write(sl->tty, sl->xbuff, count);
sl->xleft = count - actual;
sl->xhead = sl->xbuff + actual;
@@ -258,7 +259,7 @@ static void x25_asy_encaps(struct x25_asy *sl, unsigned char *icp, int len)
static void x25_asy_write_wakeup(struct tty_struct *tty)
{
int actual;
- struct x25_asy *sl = (struct x25_asy *) tty->disc_data;
+ struct x25_asy *sl = tty->disc_data;
/* First make sure we're connected. */
if (!sl || sl->magic != X25_ASY_MAGIC || !netif_running(sl->dev))
@@ -267,8 +268,8 @@ static void x25_asy_write_wakeup(struct tty_struct *tty)
if (sl->xleft <= 0) {
/* Now serial buffer is almost free & we can start
* transmission of another packet */
- sl->stats.tx_packets++;
- tty->flags &= ~(1 << TTY_DO_WRITE_WAKEUP);
+ sl->dev->stats.tx_packets++;
+ clear_bit(TTY_DO_WRITE_WAKEUP, &tty->flags);
x25_asy_unlock(sl);
return;
}
@@ -280,18 +281,18 @@ static void x25_asy_write_wakeup(struct tty_struct *tty)
static void x25_asy_timeout(struct net_device *dev)
{
- struct x25_asy *sl = dev->priv;
+ struct x25_asy *sl = netdev_priv(dev);
spin_lock(&sl->lock);
if (netif_queue_stopped(dev)) {
/* May be we must check transmitter timeout here ?
* 14 Oct 1994 Dmitry Gorodchanin.
*/
- printk(KERN_WARNING "%s: transmit timed out, %s?\n", dev->name,
- (tty_chars_in_buffer(sl->tty) || sl->xleft) ?
- "bad line quality" : "driver error");
+ netdev_warn(dev, "transmit timed out, %s?\n",
+ (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);
x25_asy_unlock(sl);
}
spin_unlock(&sl->lock);
@@ -299,34 +300,36 @@ static void x25_asy_timeout(struct net_device *dev)
/* Encapsulate an IP datagram and kick it into a TTY queue. */
-static int x25_asy_xmit(struct sk_buff *skb, struct net_device *dev)
+static netdev_tx_t x25_asy_xmit(struct sk_buff *skb,
+ struct net_device *dev)
{
- struct x25_asy *sl = dev->priv;
+ struct x25_asy *sl = netdev_priv(dev);
int err;
if (!netif_running(sl->dev)) {
- printk(KERN_ERR "%s: xmit call when iface is down\n",
- dev->name);
+ netdev_err(dev, "xmit call when iface is down\n");
kfree_skb(skb);
- return 0;
+ return NETDEV_TX_OK;
}
switch (skb->data[0]) {
- case 0x00:
+ case X25_IFACE_DATA:
break;
- case 0x01: /* Connection request .. do nothing */
+ case X25_IFACE_CONNECT: /* Connection request .. do nothing */
err = lapb_connect_request(dev);
if (err != LAPB_OK)
- printk(KERN_ERR "x25_asy: lapb_connect_request error - %d\n", err);
+ netdev_err(dev, "lapb_connect_request error: %d\n",
+ err);
kfree_skb(skb);
- return 0;
- case 0x02: /* Disconnect request .. do nothing - hang up ?? */
+ return NETDEV_TX_OK;
+ case X25_IFACE_DISCONNECT: /* do nothing - hang up ?? */
err = lapb_disconnect_request(dev);
if (err != LAPB_OK)
- printk(KERN_ERR "x25_asy: lapb_disconnect_request error - %d\n", err);
+ netdev_err(dev, "lapb_disconnect_request error: %d\n",
+ err);
default:
kfree_skb(skb);
- return 0;
+ return NETDEV_TX_OK;
}
skb_pull(skb, 1); /* Remove control byte */
/*
@@ -342,11 +345,11 @@ static int x25_asy_xmit(struct sk_buff *skb, struct net_device *dev)
err = lapb_data_request(dev, skb);
if (err != LAPB_OK) {
- printk(KERN_ERR "x25_asy: lapb_data_request error - %d\n", err);
+ netdev_err(dev, "lapb_data_request error: %d\n", err);
kfree_skb(skb);
- return 0;
+ return NETDEV_TX_OK;
}
- return 0;
+ return NETDEV_TX_OK;
}
@@ -361,7 +364,6 @@ static int x25_asy_xmit(struct sk_buff *skb, struct net_device *dev)
static int x25_asy_data_indication(struct net_device *dev, struct sk_buff *skb)
{
- skb->dev->last_rx = jiffies;
return netif_rx(skb);
}
@@ -373,19 +375,19 @@ static int x25_asy_data_indication(struct net_device *dev, struct sk_buff *skb)
static void x25_asy_data_transmit(struct net_device *dev, struct sk_buff *skb)
{
- struct x25_asy *sl = dev->priv;
+ struct x25_asy *sl = netdev_priv(dev);
spin_lock(&sl->lock);
if (netif_queue_stopped(sl->dev) || sl->tty == NULL) {
spin_unlock(&sl->lock);
- printk(KERN_ERR "x25_asy: tbusy drop\n");
+ netdev_err(dev, "tbusy drop\n");
kfree_skb(skb);
return;
}
/* We were not busy, so we are now... :-) */
if (skb != NULL) {
x25_asy_lock(sl);
- sl->stats.tx_bytes += skb->len;
+ dev->stats.tx_bytes += skb->len;
x25_asy_encaps(sl, skb->data, skb->len);
dev_kfree_skb(skb);
}
@@ -398,59 +400,56 @@ static void x25_asy_data_transmit(struct net_device *dev, struct sk_buff *skb)
static void x25_asy_connected(struct net_device *dev, int reason)
{
- struct x25_asy *sl = dev->priv;
+ struct x25_asy *sl = netdev_priv(dev);
struct sk_buff *skb;
unsigned char *ptr;
skb = dev_alloc_skb(1);
if (skb == NULL) {
- printk(KERN_ERR "x25_asy: out of memory\n");
+ netdev_err(dev, "out of memory\n");
return;
}
ptr = skb_put(skb, 1);
- *ptr = 0x01;
+ *ptr = X25_IFACE_CONNECT;
skb->protocol = x25_type_trans(skb, sl->dev);
netif_rx(skb);
- sl->dev->last_rx = jiffies;
}
static void x25_asy_disconnected(struct net_device *dev, int reason)
{
- struct x25_asy *sl = dev->priv;
+ struct x25_asy *sl = netdev_priv(dev);
struct sk_buff *skb;
unsigned char *ptr;
skb = dev_alloc_skb(1);
if (skb == NULL) {
- printk(KERN_ERR "x25_asy: out of memory\n");
+ netdev_err(dev, "out of memory\n");
return;
}
ptr = skb_put(skb, 1);
- *ptr = 0x02;
+ *ptr = X25_IFACE_DISCONNECT;
skb->protocol = x25_type_trans(skb, sl->dev);
netif_rx(skb);
- sl->dev->last_rx = jiffies;
}
-static struct lapb_register_struct x25_asy_callbacks = {
+static const struct lapb_register_struct x25_asy_callbacks = {
.connect_confirmation = x25_asy_connected,
.connect_indication = x25_asy_connected,
.disconnect_confirmation = x25_asy_disconnected,
.disconnect_indication = x25_asy_disconnected,
.data_indication = x25_asy_data_indication,
.data_transmit = x25_asy_data_transmit,
-
};
/* Open the low-level part of the X.25 channel. Easy! */
static int x25_asy_open(struct net_device *dev)
{
- struct x25_asy *sl = dev->priv;
+ struct x25_asy *sl = netdev_priv(dev);
unsigned long len;
int err;
@@ -499,20 +498,15 @@ norbuff:
/* Close the low-level part of the X.25 channel. Easy! */
static int x25_asy_close(struct net_device *dev)
{
- struct x25_asy *sl = dev->priv;
- int err;
+ struct x25_asy *sl = netdev_priv(dev);
spin_lock(&sl->lock);
if (sl->tty)
- 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;
- err = lapb_unregister(dev);
- if (err != LAPB_OK)
- printk(KERN_ERR "x25_asy_close: lapb_unregister error -%d\n",
- err);
spin_unlock(&sl->lock);
return 0;
}
@@ -527,7 +521,7 @@ static int x25_asy_close(struct net_device *dev)
static void x25_asy_receive_buf(struct tty_struct *tty,
const unsigned char *cp, char *fp, int count)
{
- struct x25_asy *sl = (struct x25_asy *) tty->disc_data;
+ struct x25_asy *sl = tty->disc_data;
if (!sl || sl->magic != X25_ASY_MAGIC || !netif_running(sl->dev))
return;
@@ -537,7 +531,7 @@ static void x25_asy_receive_buf(struct tty_struct *tty,
while (count--) {
if (fp && *fp++) {
if (!test_and_set_bit(SLF_ERROR, &sl->flags))
- sl->stats.rx_errors++;
+ sl->dev->stats.rx_errors++;
cp++;
continue;
}
@@ -555,7 +549,7 @@ static void x25_asy_receive_buf(struct tty_struct *tty,
static int x25_asy_open_tty(struct tty_struct *tty)
{
- struct x25_asy *sl = (struct x25_asy *) tty->disc_data;
+ struct x25_asy *sl = tty->disc_data;
int err;
if (tty->ops->write == NULL)
@@ -584,7 +578,7 @@ static int x25_asy_open_tty(struct tty_struct *tty)
if (err)
return err;
/* Done. We have linked the TTY line to a channel. */
- return sl->dev->base_addr;
+ return 0;
}
@@ -596,7 +590,8 @@ static int x25_asy_open_tty(struct tty_struct *tty)
*/
static void x25_asy_close_tty(struct tty_struct *tty)
{
- struct x25_asy *sl = (struct x25_asy *) tty->disc_data;
+ struct x25_asy *sl = tty->disc_data;
+ int err;
/* First make sure we're connected. */
if (!sl || sl->magic != X25_ASY_MAGIC)
@@ -607,24 +602,21 @@ static void x25_asy_close_tty(struct tty_struct *tty)
dev_close(sl->dev);
rtnl_unlock();
+ err = lapb_unregister(sl->dev);
+ if (err != LAPB_OK)
+ pr_err("x25_asy_close: lapb_unregister error: %d\n",
+ err);
+
tty->disc_data = NULL;
sl->tty = NULL;
x25_asy_free(sl);
}
-
-static struct net_device_stats *x25_asy_get_stats(struct net_device *dev)
-{
- struct x25_asy *sl = dev->priv;
- return &sl->stats;
-}
-
-
/************************************************************************
* STANDARD X.25 ENCAPSULATION *
************************************************************************/
-int x25_asy_esc(unsigned char *s, unsigned char *d, int len)
+static int x25_asy_esc(unsigned char *s, unsigned char *d, int len)
{
unsigned char *ptr = d;
unsigned char c;
@@ -658,7 +650,7 @@ int x25_asy_esc(unsigned char *s, unsigned char *d, int len)
}
}
*ptr++ = X25_END;
- return (ptr - d);
+ return ptr - d;
}
static void x25_asy_unesc(struct x25_asy *sl, unsigned char s)
@@ -666,8 +658,8 @@ static void x25_asy_unesc(struct x25_asy *sl, unsigned char s)
switch (s) {
case X25_END:
- if (!test_and_clear_bit(SLF_ERROR, &sl->flags)
- && sl->rcount > 2)
+ if (!test_and_clear_bit(SLF_ERROR, &sl->flags) &&
+ sl->rcount > 2)
x25_asy_bump(sl);
clear_bit(SLF_ESCAPE, &sl->flags);
sl->rcount = 0;
@@ -686,7 +678,7 @@ static void x25_asy_unesc(struct x25_asy *sl, unsigned char s)
sl->rbuff[sl->rcount++] = s;
return;
}
- sl->stats.rx_over_errors++;
+ sl->dev->stats.rx_over_errors++;
set_bit(SLF_ERROR, &sl->flags);
}
}
@@ -696,7 +688,7 @@ static void x25_asy_unesc(struct x25_asy *sl, unsigned char s)
static int x25_asy_ioctl(struct tty_struct *tty, struct file *file,
unsigned int cmd, unsigned long arg)
{
- struct x25_asy *sl = (struct x25_asy *) tty->disc_data;
+ struct x25_asy *sl = tty->disc_data;
/* First make sure we're connected. */
if (!sl || sl->magic != X25_ASY_MAGIC)
@@ -715,18 +707,41 @@ static int x25_asy_ioctl(struct tty_struct *tty, struct file *file,
}
}
+#ifdef CONFIG_COMPAT
+static long x25_asy_compat_ioctl(struct tty_struct *tty, struct file *file,
+ unsigned int cmd, unsigned long arg)
+{
+ switch (cmd) {
+ case SIOCGIFNAME:
+ case SIOCSIFHWADDR:
+ return x25_asy_ioctl(tty, file, cmd,
+ (unsigned long)compat_ptr(arg));
+ }
+
+ return -ENOIOCTLCMD;
+}
+#endif
+
static int x25_asy_open_dev(struct net_device *dev)
{
- struct x25_asy *sl = dev->priv;
+ struct x25_asy *sl = netdev_priv(dev);
if (sl->tty == NULL)
return -ENODEV;
return 0;
}
+static const struct net_device_ops x25_asy_netdev_ops = {
+ .ndo_open = x25_asy_open_dev,
+ .ndo_stop = x25_asy_close,
+ .ndo_start_xmit = x25_asy_xmit,
+ .ndo_tx_timeout = x25_asy_timeout,
+ .ndo_change_mtu = x25_asy_change_mtu,
+};
+
/* Initialise the X.25 driver. Called by the device init code */
static void x25_asy_setup(struct net_device *dev)
{
- struct x25_asy *sl = dev->priv;
+ struct x25_asy *sl = netdev_priv(dev);
sl->magic = X25_ASY_MAGIC;
sl->dev = dev;
@@ -738,13 +753,8 @@ static void x25_asy_setup(struct net_device *dev)
*/
dev->mtu = SL_MTU;
- dev->hard_start_xmit = x25_asy_xmit;
- dev->tx_timeout = x25_asy_timeout;
+ dev->netdev_ops = &x25_asy_netdev_ops;
dev->watchdog_timeo = HZ*20;
- dev->open = x25_asy_open_dev;
- dev->stop = x25_asy_close;
- dev->get_stats = x25_asy_get_stats;
- dev->change_mtu = x25_asy_change_mtu;
dev->hard_header_len = 0;
dev->addr_len = 0;
dev->type = ARPHRD_X25;
@@ -761,6 +771,9 @@ static struct tty_ldisc_ops x25_ldisc = {
.open = x25_asy_open_tty,
.close = x25_asy_close_tty,
.ioctl = x25_asy_ioctl,
+#ifdef CONFIG_COMPAT
+ .compat_ioctl = x25_asy_compat_ioctl,
+#endif
.receive_buf = x25_asy_receive_buf,
.write_wakeup = x25_asy_write_wakeup,
};
@@ -770,16 +783,13 @@ static int __init init_x25_asy(void)
if (x25_asy_maxdev < 4)
x25_asy_maxdev = 4; /* Sanity */
- printk(KERN_INFO "X.25 async: version 0.00 ALPHA "
- "(dynamic channels, max=%d).\n", x25_asy_maxdev);
+ pr_info("X.25 async: version 0.00 ALPHA (dynamic channels, max=%d)\n",
+ x25_asy_maxdev);
x25_asy_devs = kcalloc(x25_asy_maxdev, sizeof(struct net_device *),
GFP_KERNEL);
- if (!x25_asy_devs) {
- printk(KERN_WARNING "X25 async: Can't allocate x25_asy_ctrls[] "
- "array! Uaargh! (-> No X.25 available)\n");
+ if (!x25_asy_devs)
return -ENOMEM;
- }
return tty_register_ldisc(N_X25, &x25_ldisc);
}
@@ -793,7 +803,7 @@ static void __exit exit_x25_asy(void)
for (i = 0; i < x25_asy_maxdev; i++) {
dev = x25_asy_devs[i];
if (dev) {
- struct x25_asy *sl = dev->priv;
+ struct x25_asy *sl = netdev_priv(dev);
spin_lock_bh(&sl->lock);
if (sl->tty)
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2025-12-09 10:04:30 +0000