batman-adv: Allow to use rntl_link for device creation/deletion

The sysfs configuration interface of batman-adv to add/remove soft-interfaces
is not deadlock free and doesn't follow the currently common way to create new
virtual interfaces.

An additional interface though rtnl_link is introduced which provides easy device
creation/deletion with tools like "ip":

$ ip link add dev bat0 type batadv
$ ip link del dev bat0

Signed-off-by: Sven Eckelmann <sven@narfation.org>
Signed-off-by: Marek Lindner <lindner_marek@yahoo.de>
Signed-off-by: Antonio Quartulli <ordex@autistici.org>

1 files changed, 2 insertions, 0 deletions

diff --git a/net/batman-adv/main.c b/net/batman-adv/main.c
index 0495a7dc7505..62b1f89b7b4d 100644
--- a/net/batman-adv/main.c
+++ b/net/batman-adv/main.c
@@ -71,6 +71,7 @@ static int __init batadv_init(void)
         batadv_debugfs_init();
 
         register_netdevice_notifier(&batadv_hard_if_notifier);
+        rtnl_link_register(&batadv_link_ops);
 
         pr_info("B.A.T.M.A.N. advanced %s (compatibility version %i) loaded\n",
                 BATADV_SOURCE_VERSION, BATADV_COMPAT_VERSION);
@@ -81,6 +82,7 @@ static int __init batadv_init(void)
 static void __exit batadv_exit(void)
 {
         batadv_debugfs_destroy();
+        rtnl_link_unregister(&batadv_link_ops);
         unregister_netdevice_notifier(&batadv_hard_if_notifier);
         batadv_hardif_remove_interfaces();