Use the notification chains to also send uevents, so that userspace can be
notified of state changes of every rfkill switch.
Userspace should use these events for OSD/status report applications and
rfkill GUI frontends. HAL might want to broadcast them over DBUS, for
example. It might be also useful for userspace implementations of
rfkill-input, or to use HAL as the platform driver which promotes rfkill
switch change events into input events (to synchronize all other switches)
when necessary for platforms that lack a convenient platform-specific
kernel module to do it.
Signed-off-by: Henrique de Moraes Holschuh <hmh@hmh.eng.br>
Cc: Ivo van Doorn <IvDoorn@gmail.com>
Cc: Dmitry Torokhov <dtor@mail.ru>
---
net/rfkill/rfkill.c | 42 ++++++++++++++++++++++++++++++++++++++++++
1 files changed, 42 insertions(+), 0 deletions(-)
diff --git a/net/rfkill/rfkill.c b/net/rfkill/rfkill.c
index 4ed8d19..ba25bde 100644
--- a/net/rfkill/rfkill.c
+++ b/net/rfkill/rfkill.c
@@ -382,12 +382,51 @@ static int rfkill_resume(struct device *dev)
#define rfkill_resume NULL
#endif
+static int rfkill_blocking_uevent_notifier(struct notifier_block *nb,
+ unsigned long eventid,
+ void *data)
+{
+ struct rfkill *rfkill = (struct rfkill *)data;
+
+ switch (eventid) {
+ case RFKILL_STATE_CHANGED:
+ kobject_uevent(&rfkill->dev.kobj, KOBJ_CHANGE);
+ break;
+ default:
+ break;
+ }
+
+ return NOTIFY_DONE;
+}
+
+static struct notifier_block rfkill_blocking_uevent_nb = {
+ .notifier_call = rfkill_blocking_uevent_notifier,
+ .priority = 0,
+};
+
+static int rfkill_dev_uevent(struct device *dev, struct kobj_uevent_env *env)
+{
+ struct rfkill *rfkill = to_rfkill(dev);
+ int error;
+
+ error = add_uevent_var(env, "RFKILL_NAME=%s", rfkill->name);
+ if (error)
+ return error;
+ error = add_uevent_var(env, "RFKILL_TYPE=%s",
+ rfkill_get_type_str(rfkill->type));
+ if (error)
+ return error;
+ error = add_uevent_var(env, "RFKILL_STATE=%u", rfkill->state);
+ return error;
+}
+
static struct class rfkill_class = {
.name = "rfkill",
.dev_release = rfkill_release,
.dev_attrs = rfkill_dev_attrs,
.suspend = rfkill_suspend,
.resume = rfkill_resume,
+ .dev_uevent = rfkill_dev_uevent,
};
static int rfkill_add_switch(struct rfkill *rfkill)
@@ -562,11 +601,14 @@ static int __init rfkill_init(void)
return error;
}
+ register_rfkill_notifier(&rfkill_blocking_uevent_nb);
+
return 0;
}
static void __exit rfkill_exit(void)
{
+ unregister_rfkill_notifier(&rfkill_blocking_uevent_nb);
class_unregister(&rfkill_class);
}
--
1.5.5.1
--
