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path: root/net/netrom/nr_route.c
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Diffstat (limited to 'net/netrom/nr_route.c')
-rw-r--r--net/netrom/nr_route.c130
1 files changed, 50 insertions, 80 deletions
diff --git a/net/netrom/nr_route.c b/net/netrom/nr_route.c
index aacba76070f..b976d5eff2d 100644
--- a/net/netrom/nr_route.c
+++ b/net/netrom/nr_route.c
@@ -17,6 +17,7 @@
#include <linux/string.h>
#include <linux/sockios.h>
#include <linux/net.h>
+#include <linux/slab.h>
#include <net/ax25.h>
#include <linux/inet.h>
#include <linux/netdevice.h>
@@ -25,7 +26,6 @@
#include <linux/skbuff.h>
#include <net/sock.h>
#include <asm/uaccess.h>
-#include <asm/system.h>
#include <linux/fcntl.h>
#include <linux/termios.h> /* For TIOCINQ/OUTQ */
#include <linux/mm.h>
@@ -36,6 +36,7 @@
#include <linux/spinlock.h>
#include <net/netrom.h>
#include <linux/seq_file.h>
+#include <linux/export.h>
static unsigned int nr_neigh_no = 1;
@@ -48,10 +49,9 @@ static struct nr_node *nr_node_get(ax25_address *callsign)
{
struct nr_node *found = NULL;
struct nr_node *nr_node;
- struct hlist_node *node;
spin_lock_bh(&nr_node_list_lock);
- nr_node_for_each(nr_node, node, &nr_node_list)
+ nr_node_for_each(nr_node, &nr_node_list)
if (ax25cmp(callsign, &nr_node->callsign) == 0) {
nr_node_hold(nr_node);
found = nr_node;
@@ -66,10 +66,9 @@ static struct nr_neigh *nr_neigh_get_dev(ax25_address *callsign,
{
struct nr_neigh *found = NULL;
struct nr_neigh *nr_neigh;
- struct hlist_node *node;
spin_lock_bh(&nr_neigh_list_lock);
- nr_neigh_for_each(nr_neigh, node, &nr_neigh_list)
+ nr_neigh_for_each(nr_neigh, &nr_neigh_list)
if (ax25cmp(callsign, &nr_neigh->callsign) == 0 &&
nr_neigh->dev == dev) {
nr_neigh_hold(nr_neigh);
@@ -113,10 +112,9 @@ static int __must_check nr_add_node(ax25_address *nr, const char *mnemonic,
*/
if (nr_neigh != NULL && nr_neigh->failed != 0 && quality == 0) {
struct nr_node *nr_nodet;
- struct hlist_node *node;
spin_lock_bh(&nr_node_list_lock);
- nr_node_for_each(nr_nodet, node, &nr_node_list) {
+ nr_node_for_each(nr_nodet, &nr_node_list) {
nr_node_lock(nr_nodet);
for (i = 0; i < nr_nodet->count; i++)
if (nr_nodet->routes[i].neighbour == nr_neigh)
@@ -256,9 +254,12 @@ static int __must_check nr_add_node(ax25_address *nr, const char *mnemonic,
case 3:
if (nr_node->routes[1].quality > nr_node->routes[0].quality) {
switch (nr_node->which) {
- case 0: nr_node->which = 1; break;
- case 1: nr_node->which = 0; break;
- default: break;
+ case 0:
+ nr_node->which = 1;
+ break;
+ case 1:
+ nr_node->which = 0;
+ break;
}
nr_route = nr_node->routes[0];
nr_node->routes[0] = nr_node->routes[1];
@@ -481,11 +482,11 @@ static int nr_dec_obs(void)
{
struct nr_neigh *nr_neigh;
struct nr_node *s;
- struct hlist_node *node, *nodet;
+ struct hlist_node *nodet;
int i;
spin_lock_bh(&nr_node_list_lock);
- nr_node_for_each_safe(s, node, nodet, &nr_node_list) {
+ nr_node_for_each_safe(s, nodet, &nr_node_list) {
nr_node_lock(s);
for (i = 0; i < s->count; i++) {
switch (s->routes[i].obs_count) {
@@ -504,12 +505,13 @@ static int nr_dec_obs(void)
s->count--;
switch (i) {
- case 0:
- s->routes[0] = s->routes[1];
- case 1:
- s->routes[1] = s->routes[2];
- case 2:
- break;
+ case 0:
+ s->routes[0] = s->routes[1];
+ /* Fallthrough */
+ case 1:
+ s->routes[1] = s->routes[2];
+ case 2:
+ break;
}
break;
@@ -535,15 +537,15 @@ static int nr_dec_obs(void)
void nr_rt_device_down(struct net_device *dev)
{
struct nr_neigh *s;
- struct hlist_node *node, *nodet, *node2, *node2t;
+ struct hlist_node *nodet, *node2t;
struct nr_node *t;
int i;
spin_lock_bh(&nr_neigh_list_lock);
- nr_neigh_for_each_safe(s, node, nodet, &nr_neigh_list) {
+ nr_neigh_for_each_safe(s, nodet, &nr_neigh_list) {
if (s->dev == dev) {
spin_lock_bh(&nr_node_list_lock);
- nr_node_for_each_safe(t, node2, node2t, &nr_node_list) {
+ nr_node_for_each_safe(t, node2t, &nr_node_list) {
nr_node_lock(t);
for (i = 0; i < t->count; i++) {
if (t->routes[i].neighbour == s) {
@@ -664,14 +666,17 @@ int nr_rt_ioctl(unsigned int cmd, void __user *arg)
case SIOCADDRT:
if (copy_from_user(&nr_route, arg, sizeof(struct nr_route_struct)))
return -EFAULT;
- if ((dev = nr_ax25_dev_get(nr_route.device)) == NULL)
+ if (nr_route.ndigis > AX25_MAX_DIGIS)
return -EINVAL;
- if (nr_route.ndigis < 0 || nr_route.ndigis > AX25_MAX_DIGIS) {
- dev_put(dev);
+ if ((dev = nr_ax25_dev_get(nr_route.device)) == NULL)
return -EINVAL;
- }
switch (nr_route.type) {
case NETROM_NODE:
+ if (strnlen(nr_route.mnemonic, 7) == 7) {
+ ret = -EINVAL;
+ break;
+ }
+
ret = nr_add_node(&nr_route.callsign,
nr_route.mnemonic,
&nr_route.neighbour,
@@ -729,11 +734,10 @@ int nr_rt_ioctl(unsigned int cmd, void __user *arg)
void nr_link_failed(ax25_cb *ax25, int reason)
{
struct nr_neigh *s, *nr_neigh = NULL;
- struct hlist_node *node;
struct nr_node *nr_node = NULL;
spin_lock_bh(&nr_neigh_list_lock);
- nr_neigh_for_each(s, node, &nr_neigh_list) {
+ nr_neigh_for_each(s, &nr_neigh_list) {
if (s->ax25 == ax25) {
nr_neigh_hold(s);
nr_neigh = s;
@@ -753,7 +757,7 @@ void nr_link_failed(ax25_cb *ax25, int reason)
return;
}
spin_lock_bh(&nr_node_list_lock);
- nr_node_for_each(nr_node, node, &nr_node_list) {
+ nr_node_for_each(nr_node, &nr_node_list) {
nr_node_lock(nr_node);
if (nr_node->which < nr_node->count &&
nr_node->routes[nr_node->which].neighbour == nr_neigh)
@@ -843,12 +847,13 @@ int nr_route_frame(struct sk_buff *skb, ax25_cb *ax25)
dptr = skb_push(skb, 1);
*dptr = AX25_P_NETROM;
- ax25s = ax25_send_frame(skb, 256, (ax25_address *)dev->dev_addr, &nr_neigh->callsign, nr_neigh->digipeat, nr_neigh->dev);
- if (nr_neigh->ax25 && ax25s) {
- /* We were already holding this ax25_cb */
+ ax25s = nr_neigh->ax25;
+ nr_neigh->ax25 = ax25_send_frame(skb, 256,
+ (ax25_address *)dev->dev_addr,
+ &nr_neigh->callsign,
+ nr_neigh->digipeat, nr_neigh->dev);
+ if (ax25s)
ax25_cb_put(ax25s);
- }
- nr_neigh->ax25 = ax25s;
dev_put(dev);
ret = (nr_neigh->ax25 != NULL);
@@ -862,33 +867,13 @@ int nr_route_frame(struct sk_buff *skb, ax25_cb *ax25)
static void *nr_node_start(struct seq_file *seq, loff_t *pos)
{
- struct nr_node *nr_node;
- struct hlist_node *node;
- int i = 1;
-
spin_lock_bh(&nr_node_list_lock);
- if (*pos == 0)
- return SEQ_START_TOKEN;
-
- nr_node_for_each(nr_node, node, &nr_node_list) {
- if (i == *pos)
- return nr_node;
- ++i;
- }
-
- return NULL;
+ return seq_hlist_start_head(&nr_node_list, *pos);
}
static void *nr_node_next(struct seq_file *seq, void *v, loff_t *pos)
{
- struct hlist_node *node;
- ++*pos;
-
- node = (v == SEQ_START_TOKEN)
- ? nr_node_list.first
- : ((struct nr_node *)v)->node_node.next;
-
- return hlist_entry(node, struct nr_node, node_node);
+ return seq_hlist_next(v, &nr_node_list, pos);
}
static void nr_node_stop(struct seq_file *seq, void *v)
@@ -905,7 +890,9 @@ static int nr_node_show(struct seq_file *seq, void *v)
seq_puts(seq,
"callsign mnemonic w n qual obs neigh qual obs neigh qual obs neigh\n");
else {
- struct nr_node *nr_node = v;
+ struct nr_node *nr_node = hlist_entry(v, struct nr_node,
+ node_node);
+
nr_node_lock(nr_node);
seq_printf(seq, "%-9s %-7s %d %d",
ax2asc(buf, &nr_node->callsign),
@@ -948,31 +935,13 @@ const struct file_operations nr_nodes_fops = {
static void *nr_neigh_start(struct seq_file *seq, loff_t *pos)
{
- struct nr_neigh *nr_neigh;
- struct hlist_node *node;
- int i = 1;
-
spin_lock_bh(&nr_neigh_list_lock);
- if (*pos == 0)
- return SEQ_START_TOKEN;
-
- nr_neigh_for_each(nr_neigh, node, &nr_neigh_list) {
- if (i == *pos)
- return nr_neigh;
- }
- return NULL;
+ return seq_hlist_start_head(&nr_neigh_list, *pos);
}
static void *nr_neigh_next(struct seq_file *seq, void *v, loff_t *pos)
{
- struct hlist_node *node;
- ++*pos;
-
- node = (v == SEQ_START_TOKEN)
- ? nr_neigh_list.first
- : ((struct nr_neigh *)v)->neigh_node.next;
-
- return hlist_entry(node, struct nr_neigh, neigh_node);
+ return seq_hlist_next(v, &nr_neigh_list, pos);
}
static void nr_neigh_stop(struct seq_file *seq, void *v)
@@ -988,8 +957,9 @@ static int nr_neigh_show(struct seq_file *seq, void *v)
if (v == SEQ_START_TOKEN)
seq_puts(seq, "addr callsign dev qual lock count failed digipeaters\n");
else {
- struct nr_neigh *nr_neigh = v;
+ struct nr_neigh *nr_neigh;
+ nr_neigh = hlist_entry(v, struct nr_neigh, neigh_node);
seq_printf(seq, "%05d %-9s %-4s %3d %d %3d %3d",
nr_neigh->number,
ax2asc(buf, &nr_neigh->callsign),
@@ -1039,16 +1009,16 @@ void __exit nr_rt_free(void)
{
struct nr_neigh *s = NULL;
struct nr_node *t = NULL;
- struct hlist_node *node, *nodet;
+ struct hlist_node *nodet;
spin_lock_bh(&nr_neigh_list_lock);
spin_lock_bh(&nr_node_list_lock);
- nr_node_for_each_safe(t, node, nodet, &nr_node_list) {
+ nr_node_for_each_safe(t, nodet, &nr_node_list) {
nr_node_lock(t);
nr_remove_node_locked(t);
nr_node_unlock(t);
}
- nr_neigh_for_each_safe(s, node, nodet, &nr_neigh_list) {
+ nr_neigh_for_each_safe(s, nodet, &nr_neigh_list) {
while(s->count) {
s->count--;
nr_neigh_put(s);
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2025-11-09 06:56:36 +0000