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authorKarl Hiramoto <karl@hiramoto.org>2010-07-09 00:55:30 +0400
committerDavid S. Miller <davem@davemloft.net>2010-07-09 11:09:20 +0400
commit7313bb8f3dd6e28bcf9c42adfd54a5cf9a4949e0 (patch)
tree65d8486a2ff4aabc23e0b021f068dd3788081923 /include/linux/atmdev.h
parent68dc9d36c19aa1fd1633427b419d5e1f44753e8a (diff)
downloadlinux-7313bb8f3dd6e28bcf9c42adfd54a5cf9a4949e0.tar.xz
atm: propagate signal changes via notifier
Add notifier chain for changes in atm_dev. Clients like br2684 will call register_atmdevice_notifier() to be notified of changes. Drivers will call atm_dev_signal_change() to notify clients like br2684 of the change. On DSL and ATM devices it's usefull to have a know if you have a carrier signal. netdevice LOWER_UP changes can be propagated to userspace via netlink monitor. Signed-off-by: Karl Hiramoto <karl@hiramoto.org> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'include/linux/atmdev.h')
-rw-r--r--include/linux/atmdev.h17
1 files changed, 17 insertions, 0 deletions
diff --git a/include/linux/atmdev.h b/include/linux/atmdev.h
index 817b23705c91..f6481daf6e52 100644
--- a/include/linux/atmdev.h
+++ b/include/linux/atmdev.h
@@ -431,6 +431,14 @@ struct atm_dev *atm_dev_register(const char *type,const struct atmdev_ops *ops,
int number,unsigned long *flags); /* number == -1: pick first available */
struct atm_dev *atm_dev_lookup(int number);
void atm_dev_deregister(struct atm_dev *dev);
+
+/* atm_dev_signal_change
+ *
+ * Propagate lower layer signal change in atm_dev->signal to netdevice.
+ * The event will be sent via a notifier call chain.
+ */
+void atm_dev_signal_change(struct atm_dev *dev, char signal);
+
void vcc_insert_socket(struct sock *sk);
@@ -510,6 +518,15 @@ void register_atm_ioctl(struct atm_ioctl *);
*/
void deregister_atm_ioctl(struct atm_ioctl *);
+
+/* register_atmdevice_notifier - register atm_dev notify events
+ *
+ * Clients like br2684 will register notify events
+ * Currently we notify of signal found/lost
+ */
+int register_atmdevice_notifier(struct notifier_block *nb);
+void unregister_atmdevice_notifier(struct notifier_block *nb);
+
#endif /* __KERNEL__ */
#endif