batman-adv: add wrapper function to throw uevent in userspace

Using throw_uevent() is now possible to trigger uevent signal that can
be recognised in userspace. Uevents will be triggered through the
/devices/virtual/net/{MESH_IFACE} kobject.

A triggered uevent has three properties:
- type: the event class. Who generates the event (only 'gw' is currently
  defined). Corresponds to the BATTYPE uevent variable.
- action: the associated action with the event ('add'/'change'/'del' are
  currently defined). Corresponds to the BATACTION uevent variable.
- data: any useful data for the userspace. Corresponds to the BATDATA
  uevent variable.

Signed-off-by: Antonio Quartulli <ordex@autistici.org>
Signed-off-by: Sven Eckelmann <sven@narfation.org>

1 files changed, 11 insertions, 0 deletions

diff --git a/net/batman-adv/main.h b/net/batman-adv/main.h
index 8eae05e4dc1b..f9e0e174b3f6 100644
--- a/net/batman-adv/main.h
+++ b/net/batman-adv/main.h
@@ -91,6 +91,17 @@ enum mesh_state {
 #define BCAST_QUEUE_LEN         256
 #define BATMAN_QUEUE_LEN        256
 
+
+enum uev_action {
+        UEV_ADD = 0,
+        UEV_DEL,
+        UEV_CHANGE
+};
+
+enum uev_type {
+        UEV_GW = 0
+};
+
 /*
  * Debug Messages
  */