batman-adv: add iface_disable() callback to routing API

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

net/batman-adv/bat_iv_ogm.c

@@ -52,6 +52,12 @@ static void bat_iv_ogm_iface_enable(struct hard_iface *hard_iface)
 	batman_ogm_packet->ttvn = 0;
 }
 
+static void bat_iv_ogm_iface_disable(struct hard_iface *hard_iface)
+{
+	kfree(hard_iface->packet_buff);
+	hard_iface->packet_buff = NULL;
+}
+
 static void bat_iv_ogm_init_primary(struct hard_iface *hard_iface)
 {
 	struct batman_ogm_packet *batman_ogm_packet;
@@ -1175,6 +1181,7 @@ static void bat_iv_ogm_receive(struct hard_iface *if_incoming,
 static struct bat_algo_ops batman_iv __read_mostly = {
 	.name = "BATMAN IV",
 	.bat_iface_enable = bat_iv_ogm_iface_enable,
+	.bat_iface_disable = bat_iv_ogm_iface_disable,
 	.bat_ogm_init_primary = bat_iv_ogm_init_primary,
 	.bat_ogm_update_mac = bat_iv_ogm_update_mac,
 	.bat_ogm_schedule = bat_iv_ogm_schedule,

net/batman-adv/hard-interface.c

@@ -397,8 +397,7 @@ void hardif_disable_interface(struct hard_iface *hard_iface)
 			hardif_free_ref(new_if);
 	}
 
-	kfree(hard_iface->packet_buff);
-	hard_iface->packet_buff = NULL;
+	bat_priv->bat_algo_ops->bat_iface_disable(hard_iface);
 	hard_iface->if_status = IF_NOT_IN_USE;
 
 	/* delete all references to this hard_iface */

net/batman-adv/main.c

@@ -209,6 +209,7 @@ int bat_algo_register(struct bat_algo_ops *bat_algo_ops)
 
 	/* all algorithms must implement all ops (for now) */
 	if (!bat_algo_ops->bat_iface_enable ||
+	    !bat_algo_ops->bat_iface_disable ||
 	    !bat_algo_ops->bat_ogm_init_primary ||
 	    !bat_algo_ops->bat_ogm_update_mac ||
 	    !bat_algo_ops->bat_ogm_schedule ||

net/batman-adv/types.h

@@ -379,6 +379,8 @@ struct bat_algo_ops {
 	char *name;
 	/* init routing info when hard-interface is enabled */
 	void (*bat_iface_enable)(struct hard_iface *hard_iface);
+	/* de-init routing info when hard-interface is disabled */
+	void (*bat_iface_disable)(struct hard_iface *hard_iface);
 	/* init primary OGM when primary interface is selected */
 	void (*bat_ogm_init_primary)(struct hard_iface *hard_iface);
 	/* init mac addresses of the OGM belonging to this hard-interface */