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authorRalf Baechle DL5RB <ralf@linux-mips.org>2006-07-03 19:30:18 -0700
committerDavid S. Miller <davem@davemloft.net>2006-07-03 19:30:18 -0700
commit006f68b84fe19fc5015a8cf838a10d75f91f0218 (patch)
tree2c9377778e4e09bb8d10084341207ba1352f600a /include/net/ax25.h
parent8dc22d2b642f8a6f14ef8878777a05311e5d1d7e (diff)
downloadlinux-006f68b84fe19fc5015a8cf838a10d75f91f0218.tar.bz2
[AX.25]: Reference counting for AX.25 routes.
In the past routes could be freed even though the were possibly in use ... Signed-off-by: Ralf Baechle DL5RB <ralf@linux-mips.org> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'include/net/ax25.h')
-rw-r--r--include/net/ax25.h24
1 files changed, 15 insertions, 9 deletions
diff --git a/include/net/ax25.h b/include/net/ax25.h
index 7cd528e9d668..69374cd1a857 100644
--- a/include/net/ax25.h
+++ b/include/net/ax25.h
@@ -182,14 +182,26 @@ typedef struct {
typedef struct ax25_route {
struct ax25_route *next;
- atomic_t ref;
+ atomic_t refcount;
ax25_address callsign;
struct net_device *dev;
ax25_digi *digipeat;
char ip_mode;
- struct timer_list timer;
} ax25_route;
+static inline void ax25_hold_route(ax25_route *ax25_rt)
+{
+ atomic_inc(&ax25_rt->refcount);
+}
+
+extern void __ax25_put_route(ax25_route *ax25_rt);
+
+static inline void ax25_put_route(ax25_route *ax25_rt)
+{
+ if (atomic_dec_and_test(&ax25_rt->refcount))
+ __ax25_put_route(ax25_rt);
+}
+
typedef struct {
char slave; /* slave_mode? */
struct timer_list slave_timer; /* timeout timer */
@@ -348,17 +360,11 @@ extern int ax25_check_iframes_acked(ax25_cb *, unsigned short);
extern void ax25_rt_device_down(struct net_device *);
extern int ax25_rt_ioctl(unsigned int, void __user *);
extern struct file_operations ax25_route_fops;
+extern ax25_route *ax25_get_route(ax25_address *addr, struct net_device *dev);
extern int ax25_rt_autobind(ax25_cb *, ax25_address *);
-extern ax25_route *ax25_rt_find_route(ax25_route *, ax25_address *,
- struct net_device *);
extern struct sk_buff *ax25_rt_build_path(struct sk_buff *, ax25_address *, ax25_address *, ax25_digi *);
extern void ax25_rt_free(void);
-static inline void ax25_put_route(ax25_route *ax25_rt)
-{
- atomic_dec(&ax25_rt->ref);
-}
-
/* ax25_std_in.c */
extern int ax25_std_frame_in(ax25_cb *, struct sk_buff *, int);