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-rw-r--r--net/ax25/Kconfig2
-rw-r--r--net/ax25/af_ax25.c35
-rw-r--r--net/ax25/ax25_dev.c53
-rw-r--r--net/ax25/ax25_ip.c3
-rw-r--r--net/ax25/ax25_out.c22
-rw-r--r--net/ax25/ax25_route.c2
-rw-r--r--net/ax25/sysctl_net_ax25.c5
7 files changed, 70 insertions, 52 deletions
diff --git a/net/ax25/Kconfig b/net/ax25/Kconfig
index fdb666607f10..e23a3dc14b93 100644
--- a/net/ax25/Kconfig
+++ b/net/ax25/Kconfig
@@ -4,7 +4,7 @@
#
menuconfig HAMRADIO
- depends on NET && !S390
+ depends on NET
bool "Amateur Radio support"
help
If you want to connect your Linux box to an amateur radio, answer Y
diff --git a/net/ax25/af_ax25.c b/net/ax25/af_ax25.c
index 9169efb2f43a..9f3b8b682adb 100644
--- a/net/ax25/af_ax25.c
+++ b/net/ax25/af_ax25.c
@@ -467,7 +467,7 @@ einval_put:
goto out_put;
}
-static void ax25_fillin_cb_from_dev(ax25_cb *ax25, ax25_dev *ax25_dev)
+static void ax25_fillin_cb_from_dev(ax25_cb *ax25, const ax25_dev *ax25_dev)
{
ax25->rtt = msecs_to_jiffies(ax25_dev->values[AX25_VALUES_T1]) / 2;
ax25->t1 = msecs_to_jiffies(ax25_dev->values[AX25_VALUES_T1]);
@@ -677,22 +677,33 @@ static int ax25_setsockopt(struct socket *sock, int level, int optname,
break;
}
- rtnl_lock();
- dev = __dev_get_by_name(&init_net, devname);
+ rcu_read_lock();
+ dev = dev_get_by_name_rcu(&init_net, devname);
if (!dev) {
- rtnl_unlock();
+ rcu_read_unlock();
res = -ENODEV;
break;
}
+ if (ax25->ax25_dev) {
+ if (dev == ax25->ax25_dev->dev) {
+ rcu_read_unlock();
+ break;
+ }
+ netdev_put(ax25->ax25_dev->dev, &ax25->dev_tracker);
+ ax25_dev_put(ax25->ax25_dev);
+ }
+
ax25->ax25_dev = ax25_dev_ax25dev(dev);
if (!ax25->ax25_dev) {
- rtnl_unlock();
+ rcu_read_unlock();
res = -ENODEV;
break;
}
ax25_fillin_cb(ax25, ax25->ax25_dev);
- rtnl_unlock();
+ netdev_hold(dev, &ax25->dev_tracker, GFP_ATOMIC);
+ ax25_dev_hold(ax25->ax25_dev);
+ rcu_read_unlock();
break;
default:
@@ -1373,13 +1384,15 @@ out_release:
return err;
}
-static int ax25_accept(struct socket *sock, struct socket *newsock, int flags,
- bool kern)
+static int ax25_accept(struct socket *sock, struct socket *newsock,
+ struct proto_accept_arg *arg)
{
struct sk_buff *skb;
struct sock *newsk;
+ ax25_dev *ax25_dev;
DEFINE_WAIT(wait);
struct sock *sk;
+ ax25_cb *ax25;
int err = 0;
if (sock->state != SS_UNCONNECTED)
@@ -1409,7 +1422,7 @@ static int ax25_accept(struct socket *sock, struct socket *newsock, int flags,
if (skb)
break;
- if (flags & O_NONBLOCK) {
+ if (arg->flags & O_NONBLOCK) {
err = -EWOULDBLOCK;
break;
}
@@ -1434,6 +1447,10 @@ static int ax25_accept(struct socket *sock, struct socket *newsock, int flags,
kfree_skb(skb);
sk_acceptq_removed(sk);
newsock->state = SS_CONNECTED;
+ ax25 = sk_to_ax25(newsk);
+ ax25_dev = ax25->ax25_dev;
+ netdev_hold(ax25_dev->dev, &ax25->dev_tracker, GFP_ATOMIC);
+ ax25_dev_hold(ax25_dev);
out:
release_sock(sk);
diff --git a/net/ax25/ax25_dev.c b/net/ax25/ax25_dev.c
index 282ec581c072..3733c0254a50 100644
--- a/net/ax25/ax25_dev.c
+++ b/net/ax25/ax25_dev.c
@@ -22,11 +22,12 @@
#include <net/sock.h>
#include <linux/uaccess.h>
#include <linux/fcntl.h>
+#include <linux/list.h>
#include <linux/mm.h>
#include <linux/interrupt.h>
#include <linux/init.h>
-ax25_dev *ax25_dev_list;
+static LIST_HEAD(ax25_dev_list);
DEFINE_SPINLOCK(ax25_dev_lock);
ax25_dev *ax25_addr_ax25dev(ax25_address *addr)
@@ -34,10 +35,11 @@ ax25_dev *ax25_addr_ax25dev(ax25_address *addr)
ax25_dev *ax25_dev, *res = NULL;
spin_lock_bh(&ax25_dev_lock);
- for (ax25_dev = ax25_dev_list; ax25_dev != NULL; ax25_dev = ax25_dev->next)
+ list_for_each_entry(ax25_dev, &ax25_dev_list, list)
if (ax25cmp(addr, (const ax25_address *)ax25_dev->dev->dev_addr) == 0) {
res = ax25_dev;
ax25_dev_hold(ax25_dev);
+ break;
}
spin_unlock_bh(&ax25_dev_lock);
@@ -59,7 +61,6 @@ void ax25_dev_device_up(struct net_device *dev)
}
refcount_set(&ax25_dev->refcount, 1);
- dev->ax25_ptr = ax25_dev;
ax25_dev->dev = dev;
netdev_hold(dev, &ax25_dev->dev_tracker, GFP_KERNEL);
ax25_dev->forward = NULL;
@@ -78,17 +79,19 @@ void ax25_dev_device_up(struct net_device *dev)
ax25_dev->values[AX25_VALUES_N2] = AX25_DEF_N2;
ax25_dev->values[AX25_VALUES_PACLEN] = AX25_DEF_PACLEN;
ax25_dev->values[AX25_VALUES_PROTOCOL] = AX25_DEF_PROTOCOL;
+
+#ifdef CONFIG_AX25_DAMA_SLAVE
ax25_dev->values[AX25_VALUES_DS_TIMEOUT]= AX25_DEF_DS_TIMEOUT;
+#endif
#if defined(CONFIG_AX25_DAMA_SLAVE) || defined(CONFIG_AX25_DAMA_MASTER)
ax25_ds_setup_timer(ax25_dev);
#endif
spin_lock_bh(&ax25_dev_lock);
- ax25_dev->next = ax25_dev_list;
- ax25_dev_list = ax25_dev;
+ list_add(&ax25_dev->list, &ax25_dev_list);
+ rcu_assign_pointer(dev->ax25_ptr, ax25_dev);
spin_unlock_bh(&ax25_dev_lock);
- ax25_dev_hold(ax25_dev);
ax25_register_dev_sysctl(ax25_dev);
}
@@ -111,32 +114,19 @@ void ax25_dev_device_down(struct net_device *dev)
/*
* Remove any packet forwarding that points to this device.
*/
- for (s = ax25_dev_list; s != NULL; s = s->next)
+ list_for_each_entry(s, &ax25_dev_list, list)
if (s->forward == dev)
s->forward = NULL;
- if ((s = ax25_dev_list) == ax25_dev) {
- ax25_dev_list = s->next;
- goto unlock_put;
- }
-
- while (s != NULL && s->next != NULL) {
- if (s->next == ax25_dev) {
- s->next = ax25_dev->next;
- goto unlock_put;
+ list_for_each_entry(s, &ax25_dev_list, list) {
+ if (s == ax25_dev) {
+ list_del(&s->list);
+ break;
}
-
- s = s->next;
}
- spin_unlock_bh(&ax25_dev_lock);
- dev->ax25_ptr = NULL;
- ax25_dev_put(ax25_dev);
- return;
-unlock_put:
+ RCU_INIT_POINTER(dev->ax25_ptr, NULL);
spin_unlock_bh(&ax25_dev_lock);
- ax25_dev_put(ax25_dev);
- dev->ax25_ptr = NULL;
netdev_put(dev, &ax25_dev->dev_tracker);
ax25_dev_put(ax25_dev);
}
@@ -200,16 +190,13 @@ struct net_device *ax25_fwd_dev(struct net_device *dev)
*/
void __exit ax25_dev_free(void)
{
- ax25_dev *s, *ax25_dev;
+ ax25_dev *s, *n;
spin_lock_bh(&ax25_dev_lock);
- ax25_dev = ax25_dev_list;
- while (ax25_dev != NULL) {
- s = ax25_dev;
- netdev_put(ax25_dev->dev, &ax25_dev->dev_tracker);
- ax25_dev = ax25_dev->next;
- kfree(s);
+ list_for_each_entry_safe(s, n, &ax25_dev_list, list) {
+ netdev_put(s->dev, &s->dev_tracker);
+ list_del(&s->list);
+ ax25_dev_put(s);
}
- ax25_dev_list = NULL;
spin_unlock_bh(&ax25_dev_lock);
}
diff --git a/net/ax25/ax25_ip.c b/net/ax25/ax25_ip.c
index 36249776c021..215d4ccf12b9 100644
--- a/net/ax25/ax25_ip.c
+++ b/net/ax25/ax25_ip.c
@@ -122,6 +122,7 @@ netdev_tx_t ax25_ip_xmit(struct sk_buff *skb)
if (dev == NULL)
dev = skb->dev;
+ rcu_read_lock();
if ((ax25_dev = ax25_dev_ax25dev(dev)) == NULL) {
kfree_skb(skb);
goto put;
@@ -202,7 +203,7 @@ netdev_tx_t ax25_ip_xmit(struct sk_buff *skb)
ax25_queue_xmit(skb, dev);
put:
-
+ rcu_read_unlock();
ax25_route_lock_unuse();
return NETDEV_TX_OK;
}
diff --git a/net/ax25/ax25_out.c b/net/ax25/ax25_out.c
index 3db76d2470e9..8bca2ace98e5 100644
--- a/net/ax25/ax25_out.c
+++ b/net/ax25/ax25_out.c
@@ -39,10 +39,14 @@ ax25_cb *ax25_send_frame(struct sk_buff *skb, int paclen, const ax25_address *sr
* specified.
*/
if (paclen == 0) {
- if ((ax25_dev = ax25_dev_ax25dev(dev)) == NULL)
+ rcu_read_lock();
+ ax25_dev = ax25_dev_ax25dev(dev);
+ if (!ax25_dev) {
+ rcu_read_unlock();
return NULL;
-
+ }
paclen = ax25_dev->values[AX25_VALUES_PACLEN];
+ rcu_read_unlock();
}
/*
@@ -53,13 +57,19 @@ ax25_cb *ax25_send_frame(struct sk_buff *skb, int paclen, const ax25_address *sr
return ax25; /* It already existed */
}
- if ((ax25_dev = ax25_dev_ax25dev(dev)) == NULL)
+ rcu_read_lock();
+ ax25_dev = ax25_dev_ax25dev(dev);
+ if (!ax25_dev) {
+ rcu_read_unlock();
return NULL;
+ }
- if ((ax25 = ax25_create_cb()) == NULL)
+ if ((ax25 = ax25_create_cb()) == NULL) {
+ rcu_read_unlock();
return NULL;
-
+ }
ax25_fillin_cb(ax25, ax25_dev);
+ rcu_read_unlock();
ax25->source_addr = *src;
ax25->dest_addr = *dest;
@@ -358,7 +368,9 @@ void ax25_queue_xmit(struct sk_buff *skb, struct net_device *dev)
{
unsigned char *ptr;
+ rcu_read_lock();
skb->protocol = ax25_type_trans(skb, ax25_fwd_dev(dev));
+ rcu_read_unlock();
ptr = skb_push(skb, 1);
*ptr = 0x00; /* KISS */
diff --git a/net/ax25/ax25_route.c b/net/ax25/ax25_route.c
index b7c4d656a94b..69de75db0c9c 100644
--- a/net/ax25/ax25_route.c
+++ b/net/ax25/ax25_route.c
@@ -406,6 +406,7 @@ int ax25_rt_autobind(ax25_cb *ax25, ax25_address *addr)
ax25_route_lock_unuse();
return -EHOSTUNREACH;
}
+ rcu_read_lock();
if ((ax25->ax25_dev = ax25_dev_ax25dev(ax25_rt->dev)) == NULL) {
err = -EHOSTUNREACH;
goto put;
@@ -442,6 +443,7 @@ int ax25_rt_autobind(ax25_cb *ax25, ax25_address *addr)
}
put:
+ rcu_read_unlock();
ax25_route_lock_unuse();
return err;
}
diff --git a/net/ax25/sysctl_net_ax25.c b/net/ax25/sysctl_net_ax25.c
index db66e11e7fe8..68753aa30334 100644
--- a/net/ax25/sysctl_net_ax25.c
+++ b/net/ax25/sysctl_net_ax25.c
@@ -141,8 +141,6 @@ static const struct ctl_table ax25_param_table[] = {
.extra2 = &max_ds_timeout
},
#endif
-
- { } /* that's all, folks! */
};
int ax25_register_dev_sysctl(ax25_dev *ax25_dev)
@@ -155,6 +153,7 @@ int ax25_register_dev_sysctl(ax25_dev *ax25_dev)
if (!table)
return -ENOMEM;
+ BUILD_BUG_ON(ARRAY_SIZE(ax25_param_table) != AX25_MAX_VALUES);
for (k = 0; k < AX25_MAX_VALUES; k++)
table[k].data = &ax25_dev->values[k];
@@ -171,7 +170,7 @@ int ax25_register_dev_sysctl(ax25_dev *ax25_dev)
void ax25_unregister_dev_sysctl(ax25_dev *ax25_dev)
{
struct ctl_table_header *header = ax25_dev->sysheader;
- struct ctl_table *table;
+ const struct ctl_table *table;
if (header) {
ax25_dev->sysheader = NULL;
generated by cgit (git 2.34.1) at 2025-03-23 06:21:51 +0000