aboutsummaryrefslogtreecommitdiff
path: root/net/x25/x25_link.c
diff options
context:
space:
mode:
Diffstat (limited to 'net/x25/x25_link.c')
-rw-r--r--net/x25/x25_link.c108
1 files changed, 59 insertions, 49 deletions
diff --git a/net/x25/x25_link.c b/net/x25/x25_link.c
index 0a760fe6684..fd5ffb25873 100644
--- a/net/x25/x25_link.c
+++ b/net/x25/x25_link.c
@@ -3,7 +3,7 @@
*
* This is ALPHA test software. This code may break your machine,
* randomly fail to work with new releases, misbehave and/or generally
- * screw up. It might even work.
+ * screw up. It might even work.
*
* This code REQUIRES 2.1.15 or higher
*
@@ -16,22 +16,25 @@
* History
* X.25 001 Jonathan Naylor Started coding.
* X.25 002 Jonathan Naylor New timer architecture.
- * mar/20/00 Daniela Squassoni Disabling/enabling of facilities
+ * mar/20/00 Daniela Squassoni Disabling/enabling of facilities
* negotiation.
* 2000-09-04 Henner Eisen dev_hold() / dev_put() for x25_neigh.
*/
+#define pr_fmt(fmt) "X25: " fmt
+
#include <linux/kernel.h>
#include <linux/jiffies.h>
#include <linux/timer.h>
+#include <linux/slab.h>
#include <linux/netdevice.h>
#include <linux/skbuff.h>
#include <asm/uaccess.h>
#include <linux/init.h>
#include <net/x25.h>
-static struct list_head x25_neigh_list = LIST_HEAD_INIT(x25_neigh_list);
-static DEFINE_RWLOCK(x25_neigh_list_lock);
+LIST_HEAD(x25_neigh_list);
+DEFINE_RWLOCK(x25_neigh_list_lock);
static void x25_t20timer_expiry(unsigned long);
@@ -75,30 +78,32 @@ void x25_link_control(struct sk_buff *skb, struct x25_neigh *nb,
int confirm;
switch (frametype) {
- case X25_RESTART_REQUEST:
- confirm = !x25_t20timer_pending(nb);
- x25_stop_t20timer(nb);
- nb->state = X25_LINK_STATE_3;
- if (confirm)
- x25_transmit_restart_confirmation(nb);
+ case X25_RESTART_REQUEST:
+ confirm = !x25_t20timer_pending(nb);
+ x25_stop_t20timer(nb);
+ nb->state = X25_LINK_STATE_3;
+ if (confirm)
+ x25_transmit_restart_confirmation(nb);
+ break;
+
+ case X25_RESTART_CONFIRMATION:
+ x25_stop_t20timer(nb);
+ nb->state = X25_LINK_STATE_3;
+ break;
+
+ case X25_DIAGNOSTIC:
+ if (!pskb_may_pull(skb, X25_STD_MIN_LEN + 4))
break;
- case X25_RESTART_CONFIRMATION:
- x25_stop_t20timer(nb);
- nb->state = X25_LINK_STATE_3;
- break;
+ pr_warn("diagnostic #%d - %02X %02X %02X\n",
+ skb->data[3], skb->data[4],
+ skb->data[5], skb->data[6]);
+ break;
- case X25_DIAGNOSTIC:
- printk(KERN_WARNING "x25: diagnostic #%d - "
- "%02X %02X %02X\n",
- skb->data[3], skb->data[4],
- skb->data[5], skb->data[6]);
- break;
-
- default:
- printk(KERN_WARNING "x25: received unknown %02X "
- "with LCI 000\n", frametype);
- break;
+ default:
+ pr_warn("received unknown %02X with LCI 000\n",
+ frametype);
+ break;
}
if (nb->state == X25_LINK_STATE_3)
@@ -192,18 +197,18 @@ void x25_transmit_clear_request(struct x25_neigh *nb, unsigned int lci,
void x25_transmit_link(struct sk_buff *skb, struct x25_neigh *nb)
{
switch (nb->state) {
- case X25_LINK_STATE_0:
- skb_queue_tail(&nb->queue, skb);
- nb->state = X25_LINK_STATE_1;
- x25_establish_link(nb);
- break;
- case X25_LINK_STATE_1:
- case X25_LINK_STATE_2:
- skb_queue_tail(&nb->queue, skb);
- break;
- case X25_LINK_STATE_3:
- x25_send_frame(skb, nb);
- break;
+ case X25_LINK_STATE_0:
+ skb_queue_tail(&nb->queue, skb);
+ nb->state = X25_LINK_STATE_1;
+ x25_establish_link(nb);
+ break;
+ case X25_LINK_STATE_1:
+ case X25_LINK_STATE_2:
+ skb_queue_tail(&nb->queue, skb);
+ break;
+ case X25_LINK_STATE_3:
+ x25_send_frame(skb, nb);
+ break;
}
}
@@ -213,14 +218,14 @@ void x25_transmit_link(struct sk_buff *skb, struct x25_neigh *nb)
void x25_link_established(struct x25_neigh *nb)
{
switch (nb->state) {
- case X25_LINK_STATE_0:
- nb->state = X25_LINK_STATE_2;
- break;
- case X25_LINK_STATE_1:
- x25_transmit_restart_request(nb);
- nb->state = X25_LINK_STATE_2;
- x25_start_t20timer(nb);
- break;
+ case X25_LINK_STATE_0:
+ nb->state = X25_LINK_STATE_2;
+ break;
+ case X25_LINK_STATE_1:
+ x25_transmit_restart_request(nb);
+ nb->state = X25_LINK_STATE_2;
+ x25_start_t20timer(nb);
+ break;
}
}
@@ -247,10 +252,7 @@ void x25_link_device_up(struct net_device *dev)
return;
skb_queue_head_init(&nb->queue);
-
- init_timer(&nb->t20timer);
- nb->t20timer.data = (unsigned long)nb;
- nb->t20timer.function = &x25_t20timer_expiry;
+ setup_timer(&nb->t20timer, x25_t20timer_expiry, (unsigned long)nb);
dev_hold(dev);
nb->dev = dev;
@@ -362,16 +364,20 @@ int x25_subscr_ioctl(unsigned int cmd, void __user *arg)
dev_put(dev);
if (cmd == SIOCX25GSUBSCRIP) {
+ read_lock_bh(&x25_neigh_list_lock);
x25_subscr.extended = nb->extended;
x25_subscr.global_facil_mask = nb->global_facil_mask;
+ read_unlock_bh(&x25_neigh_list_lock);
rc = copy_to_user(arg, &x25_subscr,
sizeof(x25_subscr)) ? -EFAULT : 0;
} else {
rc = -EINVAL;
if (!(x25_subscr.extended && x25_subscr.extended != 1)) {
rc = 0;
+ write_lock_bh(&x25_neigh_list_lock);
nb->extended = x25_subscr.extended;
nb->global_facil_mask = x25_subscr.global_facil_mask;
+ write_unlock_bh(&x25_neigh_list_lock);
}
}
x25_neigh_put(nb);
@@ -394,8 +400,12 @@ void __exit x25_link_free(void)
write_lock_bh(&x25_neigh_list_lock);
list_for_each_safe(entry, tmp, &x25_neigh_list) {
+ struct net_device *dev;
+
nb = list_entry(entry, struct x25_neigh, node);
+ dev = nb->dev;
__x25_remove_neigh(nb);
+ dev_put(dev);
}
write_unlock_bh(&x25_neigh_list_lock);
}
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2025-12-05 22:26:52 +0000