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Diffstat (limited to 'net/ax25/ax25_iface.c')
-rw-r--r--net/ax25/ax25_iface.c103
1 files changed, 25 insertions, 78 deletions
diff --git a/net/ax25/ax25_iface.c b/net/ax25/ax25_iface.c
index 07ac0207eb69..aff3e652c2d1 100644
--- a/net/ax25/ax25_iface.c
+++ b/net/ax25/ax25_iface.c
@@ -29,17 +29,10 @@
#include <linux/mm.h>
#include <linux/interrupt.h>
-static struct protocol_struct {
- struct protocol_struct *next;
- unsigned int pid;
- int (*func)(struct sk_buff *, ax25_cb *);
-} *protocol_list = NULL;
+static struct ax25_protocol *protocol_list;
static DEFINE_RWLOCK(protocol_list_lock);
-static struct linkfail_struct {
- struct linkfail_struct *next;
- void (*func)(ax25_cb *, int);
-} *linkfail_list = NULL;
+static HLIST_HEAD(ax25_linkfail_list);
static DEFINE_SPINLOCK(linkfail_lock);
static struct listen_struct {
@@ -49,36 +42,23 @@ static struct listen_struct {
} *listen_list = NULL;
static DEFINE_SPINLOCK(listen_lock);
-int ax25_protocol_register(unsigned int pid,
- int (*func)(struct sk_buff *, ax25_cb *))
+/*
+ * Do not register the internal protocols AX25_P_TEXT, AX25_P_SEGMENT,
+ * AX25_P_IP or AX25_P_ARP ...
+ */
+void ax25_register_pid(struct ax25_protocol *ap)
{
- struct protocol_struct *protocol;
-
- if (pid == AX25_P_TEXT || pid == AX25_P_SEGMENT)
- return 0;
-#ifdef CONFIG_INET
- if (pid == AX25_P_IP || pid == AX25_P_ARP)
- return 0;
-#endif
- if ((protocol = kmalloc(sizeof(*protocol), GFP_ATOMIC)) == NULL)
- return 0;
-
- protocol->pid = pid;
- protocol->func = func;
-
write_lock_bh(&protocol_list_lock);
- protocol->next = protocol_list;
- protocol_list = protocol;
+ ap->next = protocol_list;
+ protocol_list = ap;
write_unlock_bh(&protocol_list_lock);
-
- return 1;
}
-EXPORT_SYMBOL(ax25_protocol_register);
+EXPORT_SYMBOL_GPL(ax25_register_pid);
void ax25_protocol_release(unsigned int pid)
{
- struct protocol_struct *s, *protocol;
+ struct ax25_protocol *s, *protocol;
write_lock_bh(&protocol_list_lock);
protocol = protocol_list;
@@ -110,54 +90,19 @@ void ax25_protocol_release(unsigned int pid)
EXPORT_SYMBOL(ax25_protocol_release);
-int ax25_linkfail_register(void (*func)(ax25_cb *, int))
+void ax25_linkfail_register(struct ax25_linkfail *lf)
{
- struct linkfail_struct *linkfail;
-
- if ((linkfail = kmalloc(sizeof(*linkfail), GFP_ATOMIC)) == NULL)
- return 0;
-
- linkfail->func = func;
-
spin_lock_bh(&linkfail_lock);
- linkfail->next = linkfail_list;
- linkfail_list = linkfail;
+ hlist_add_head(&lf->lf_node, &ax25_linkfail_list);
spin_unlock_bh(&linkfail_lock);
-
- return 1;
}
EXPORT_SYMBOL(ax25_linkfail_register);
-void ax25_linkfail_release(void (*func)(ax25_cb *, int))
+void ax25_linkfail_release(struct ax25_linkfail *lf)
{
- struct linkfail_struct *s, *linkfail;
-
spin_lock_bh(&linkfail_lock);
- linkfail = linkfail_list;
- if (linkfail == NULL) {
- spin_unlock_bh(&linkfail_lock);
- return;
- }
-
- if (linkfail->func == func) {
- linkfail_list = linkfail->next;
- spin_unlock_bh(&linkfail_lock);
- kfree(linkfail);
- return;
- }
-
- while (linkfail != NULL && linkfail->next != NULL) {
- if (linkfail->next->func == func) {
- s = linkfail->next;
- linkfail->next = linkfail->next->next;
- spin_unlock_bh(&linkfail_lock);
- kfree(s);
- return;
- }
-
- linkfail = linkfail->next;
- }
+ hlist_del_init(&lf->lf_node);
spin_unlock_bh(&linkfail_lock);
}
@@ -171,7 +116,7 @@ int ax25_listen_register(ax25_address *callsign, struct net_device *dev)
return 0;
if ((listen = kmalloc(sizeof(*listen), GFP_ATOMIC)) == NULL)
- return 0;
+ return -ENOMEM;
listen->callsign = *callsign;
listen->dev = dev;
@@ -181,7 +126,7 @@ int ax25_listen_register(ax25_address *callsign, struct net_device *dev)
listen_list = listen;
spin_unlock_bh(&listen_lock);
- return 1;
+ return 0;
}
EXPORT_SYMBOL(ax25_listen_register);
@@ -223,7 +168,7 @@ EXPORT_SYMBOL(ax25_listen_release);
int (*ax25_protocol_function(unsigned int pid))(struct sk_buff *, ax25_cb *)
{
int (*res)(struct sk_buff *, ax25_cb *) = NULL;
- struct protocol_struct *protocol;
+ struct ax25_protocol *protocol;
read_lock(&protocol_list_lock);
for (protocol = protocol_list; protocol != NULL; protocol = protocol->next)
@@ -242,7 +187,8 @@ int ax25_listen_mine(ax25_address *callsign, struct net_device *dev)
spin_lock_bh(&listen_lock);
for (listen = listen_list; listen != NULL; listen = listen->next)
- if (ax25cmp(&listen->callsign, callsign) == 0 && (listen->dev == dev || listen->dev == NULL)) {
+ if (ax25cmp(&listen->callsign, callsign) == 0 &&
+ (listen->dev == dev || listen->dev == NULL)) {
spin_unlock_bh(&listen_lock);
return 1;
}
@@ -253,17 +199,18 @@ int ax25_listen_mine(ax25_address *callsign, struct net_device *dev)
void ax25_link_failed(ax25_cb *ax25, int reason)
{
- struct linkfail_struct *linkfail;
+ struct ax25_linkfail *lf;
+ struct hlist_node *node;
spin_lock_bh(&linkfail_lock);
- for (linkfail = linkfail_list; linkfail != NULL; linkfail = linkfail->next)
- (linkfail->func)(ax25, reason);
+ hlist_for_each_entry(lf, node, &ax25_linkfail_list, lf_node)
+ lf->func(ax25, reason);
spin_unlock_bh(&linkfail_lock);
}
int ax25_protocol_is_registered(unsigned int pid)
{
- struct protocol_struct *protocol;
+ struct ax25_protocol *protocol;
int res = 0;
read_lock_bh(&protocol_list_lock);