l2tp : multicast notification to the registered listeners
Previously l2tp module did not provide any means for the user space to
get notified when tunnels/sessions are added/modified/deleted.
This change contains the following
- create a multicast group for the listeners to register.
- notify the registered listeners when the tunnels/sessions are
created/modified/deleted.
Signed-off-by: Bill Hong <bhong@brocade.com>
Reviewed-by: Stephen Hemminger <stephen@networkplumber.org>
Reviewed-by: Sven-Thorsten Dietrich <sven@brocade.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/include/uapi/linux/l2tp.h b/include/uapi/linux/l2tp.h
index 21caa26..347ef22 100644
--- a/include/uapi/linux/l2tp.h
+++ b/include/uapi/linux/l2tp.h
@@ -178,5 +178,6 @@
*/
#define L2TP_GENL_NAME "l2tp"
#define L2TP_GENL_VERSION 0x1
+#define L2TP_GENL_MCGROUP "l2tp"
#endif /* _UAPI_LINUX_L2TP_H_ */