batman-adv: purge bridge loop avoidance when its disabled

When bridge loop avoidance is disabled through sysfs, the internal
datastructures are not disabled, but only BLA operations are disabled.
To be sure that they are removed, purge the data immediately. That is
especially useful if a firmwares network state is changed, and the BLA
wait periods should restart on the new network.

Signed-off-by: Simon Wunderlich <simon@open-mesh.com>
Signed-off-by: Marek Lindner <mareklindner@neomailbox.ch>
Signed-off-by: Antonio Quartulli <a@unstable.cc>

diff --git a/net/batman-adv/bridge_loop_avoidance.c b/net/batman-adv/bridge_loop_avoidance.c
index 99dcae316ec89c01dc8342084ff48477139584bc..d5d71ac96c8a7c400d90d30d1851f49dc76db95c 100644 (file)
--- a/net/batman-adv/bridge_loop_avoidance.c
+++ b/net/batman-adv/bridge_loop_avoidance.c
@@ -1168,6 +1168,26 @@ void batadv_bla_update_orig_address(struct batadv_priv *bat_priv,
        }
 }
 
+/**
+ * batadv_bla_status_update - purge bla interfaces if necessary
+ * @net_dev: the soft interface net device
+ */
+void batadv_bla_status_update(struct net_device *net_dev)
+{
+       struct batadv_priv *bat_priv = netdev_priv(net_dev);
+       struct batadv_hard_iface *primary_if;
+
+       primary_if = batadv_primary_if_get_selected(bat_priv);
+       if (!primary_if)
+               return;
+
+       /* this function already purges everything when bla is disabled,
+        * so just call that one.
+        */
+       batadv_bla_update_orig_address(bat_priv, primary_if, primary_if);
+       batadv_hardif_free_ref(primary_if);
+}
+
 /* periodic work to do:
  *  * purge structures when they are too old
  *  * send announcements

diff --git a/net/batman-adv/bridge_loop_avoidance.h b/net/batman-adv/bridge_loop_avoidance.h
index 025152b3428239128da1958807bd0cbfaaec60c0..7ea199b8b5ab2ab64dba9e56c4ccfba272e80c37 100644 (file)
--- a/net/batman-adv/bridge_loop_avoidance.h
+++ b/net/batman-adv/bridge_loop_avoidance.h
@@ -22,6 +22,7 @@
 
 #include <linux/types.h>
 
+struct net_device;
 struct seq_file;
 struct sk_buff;
 
@@ -42,6 +43,7 @@ int batadv_bla_check_bcast_duplist(struct batadv_priv *bat_priv,
 void batadv_bla_update_orig_address(struct batadv_priv *bat_priv,
                                    struct batadv_hard_iface *primary_if,
                                    struct batadv_hard_iface *oldif);
+void batadv_bla_status_update(struct net_device *net_dev);
 int batadv_bla_init(struct batadv_priv *bat_priv);
 void batadv_bla_free(struct batadv_priv *bat_priv);
 

diff --git a/net/batman-adv/sysfs.c b/net/batman-adv/sysfs.c
index 9de3c8804ff48de8a8b7a9fab6b0c2660b51a88f..48e2aaddda49d3c33dee2c792dc1d054bf6247db 100644 (file)
--- a/net/batman-adv/sysfs.c
+++ b/net/batman-adv/sysfs.c
@@ -40,6 +40,7 @@
 #include "distributed-arp-table.h"
 #include "gateway_client.h"
 #include "gateway_common.h"
+#include "bridge_loop_avoidance.h"
 #include "hard-interface.h"
 #include "network-coding.h"
 #include "packet.h"
@@ -549,7 +550,8 @@ static ssize_t batadv_store_isolation_mark(struct kobject *kobj,
 BATADV_ATTR_SIF_BOOL(aggregated_ogms, S_IRUGO | S_IWUSR, NULL);
 BATADV_ATTR_SIF_BOOL(bonding, S_IRUGO | S_IWUSR, NULL);
 #ifdef CONFIG_BATMAN_ADV_BLA
-BATADV_ATTR_SIF_BOOL(bridge_loop_avoidance, S_IRUGO | S_IWUSR, NULL);
+BATADV_ATTR_SIF_BOOL(bridge_loop_avoidance, S_IRUGO | S_IWUSR,
+                    batadv_bla_status_update);
 #endif
 #ifdef CONFIG_BATMAN_ADV_DAT
 BATADV_ATTR_SIF_BOOL(distributed_arp_table, S_IRUGO | S_IWUSR,