batman-adv: make bridge loop avoidance switchable

Signed-off-by: Simon Wunderlich <siwu@hrz.tu-chemnitz.de>
Signed-off-by: Antonio Quartulli <ordex@autistici.org>

Documentation/ABI/testing/sysfs-class-net-mesh

@@ -14,6 +14,15 @@ Description:
                 mesh will be sent using multiple interfaces at the
                 same time (if available).
 
+What:           /sys/class/net/<mesh_iface>/mesh/bridge_loop_avoidance
+Date:           November 2011
+Contact:        Simon Wunderlich <siwu@hrz.tu-chemnitz.de>
+Description:
+                Indicates whether the bridge loop avoidance feature
+                is enabled. This feature detects and avoids loops
+                between the mesh and devices bridged with the soft
+                interface <mesh_iface>.
+
 What:           /sys/class/net/<mesh_iface>/mesh/fragmentation
 Date:           October 2010
 Contact:        Andreas Langer <an.langer@gmx.de>

net/batman-adv/bat_sysfs.c

@@ -386,6 +386,7 @@ static ssize_t store_gw_bwidth(struct kobject *kobj, struct attribute *attr,
 
 BAT_ATTR_BOOL(aggregated_ogms, S_IRUGO | S_IWUSR, NULL);
 BAT_ATTR_BOOL(bonding, S_IRUGO | S_IWUSR, NULL);
+BAT_ATTR_BOOL(bridge_loop_avoidance, S_IRUGO | S_IWUSR, NULL);
 BAT_ATTR_BOOL(fragmentation, S_IRUGO | S_IWUSR, update_min_mtu);
 BAT_ATTR_BOOL(ap_isolation, S_IRUGO | S_IWUSR, NULL);
 static BAT_ATTR(vis_mode, S_IRUGO | S_IWUSR, show_vis_mode, store_vis_mode);
@@ -404,6 +405,7 @@ BAT_ATTR_UINT(log_level, S_IRUGO | S_IWUSR, 0, 15, NULL);
 static struct bat_attribute *mesh_attrs[] = {
 	&bat_attr_aggregated_ogms,
 	&bat_attr_bonding,
+	&bat_attr_bridge_loop_avoidance,
 	&bat_attr_fragmentation,
 	&bat_attr_ap_isolation,
 	&bat_attr_vis_mode,