batman-adv: ELP - adding sysfs parameter for elp interval

This parameter can be set individually on each interface and
allows the configuration of the elp interval for the link
quality measurements during runtime. Usually it is desirable
to set it to a higher (= slower) value on interfaces which
have a more static characteristic (e.g. wired interfaces)
or very dense neighbourhoods to reduce overhead.

Developed by Linus during a 6 months trainee study period in
Ascom (Switzerland) AG.

Signed-off-by: Linus Luessing <linus.luessing@web.de>
Signed-off-by: Marek Lindner <mareklindner@neomailbox.ch>
[antonio@open-mesh.com: respin on top of the latest master]
Signed-off-by: Antonio Quartulli <antonio@open-mesh.com>

diff --git a/Documentation/ABI/testing/sysfs-class-net-batman-adv b/Documentation/ABI/testing/sysfs-class-net-batman-adv
index 7f34a95bb9634c9d8d1d9505d31b68c36bc58f76..aea78db983bc4a6005440ec9981ff4e9c762dc59 100644 (file)
--- a/Documentation/ABI/testing/sysfs-class-net-batman-adv
+++ b/Documentation/ABI/testing/sysfs-class-net-batman-adv
@@ -1,4 +1,11 @@
 
+What:           /sys/class/net/<iface>/batman-adv/elp_interval
+Date:           Feb 2014
+Contact:        Linus Lüssing <linus.luessing@web.de>
+Description:
+                Defines the interval in milliseconds in which batman
+                sends its probing packets for link quality measurements.
+
 What:           /sys/class/net/<iface>/batman-adv/iface_status
 Date:           May 2010
 Contact:        Marek Lindner <mareklindner@neomailbox.ch>
@@ -12,4 +19,3 @@ Description:
                 The /sys/class/net/<iface>/batman-adv/mesh_iface file
                 displays the batman mesh interface this <iface>
                 currently is associated with.
-

diff --git a/net/batman-adv/sysfs.c b/net/batman-adv/sysfs.c
index d3f69d5e79d994744f1cc297cef8949c934f4f45..e86014332e1c1f1ecf1007843e85cad66b1a0b41 100644 (file)
--- a/net/batman-adv/sysfs.c
+++ b/net/batman-adv/sysfs.c
@@ -920,10 +920,17 @@ static ssize_t batadv_show_iface_status(struct kobject *kobj,
 static BATADV_ATTR(mesh_iface, S_IRUGO | S_IWUSR, batadv_show_mesh_iface,
                   batadv_store_mesh_iface);
 static BATADV_ATTR(iface_status, S_IRUGO, batadv_show_iface_status, NULL);
+#ifdef CONFIG_BATMAN_ADV_BATMAN_V
+BATADV_ATTR_HIF_UINT(elp_interval, bat_v.elp_interval, S_IRUGO | S_IWUSR,
+                    2 * BATADV_JITTER, INT_MAX, NULL);
+#endif
 
 static struct batadv_attribute *batadv_batman_attrs[] = {
        &batadv_attr_mesh_iface,
        &batadv_attr_iface_status,
+#ifdef CONFIG_BATMAN_ADV_BATMAN_V
+       &batadv_attr_elp_interval,
+#endif
        NULL,
 };