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authorAntonio Quartulli <antonio@open-mesh.com>2015-11-10 20:50:51 +0300
committerAntonio Quartulli <a@unstable.cc>2016-02-29 11:25:06 +0300
commitc833484e5f3872a38fe232c663586069d5ad9645 (patch)
treed4ab62093f50a411de1fb0ed6bef90634fbe61b1 /net/batman-adv/bat_v.c
parent95d392784dd0a51e4216e075f04a68c922745985 (diff)
downloadlinux-c833484e5f3872a38fe232c663586069d5ad9645.tar.xz
batman-adv: ELP - compute the metric based on the estimated throughput
In case of wireless interface retrieve the throughput by querying cfg80211. To perform this call a separate work must be scheduled because the function may sleep and this is not allowed within an RCU protected context (RCU in this case is used to iterate over all the neighbours). Use ethtool to retrieve information about an Ethernet link like HALF/FULL_DUPLEX and advertised bandwidth (e.g. 100/10Mbps). The metric is updated each time a new ELP packet is sent, this way it is possible to timely react to a metric variation which can imply (for example) a neighbour disconnection. Signed-off-by: Antonio Quartulli <antonio@open-mesh.com> Signed-off-by: Marek Lindner <mareklindner@neomailbox.ch>
Diffstat (limited to 'net/batman-adv/bat_v.c')
-rw-r--r--net/batman-adv/bat_v.c3
1 files changed, 3 insertions, 0 deletions
diff --git a/net/batman-adv/bat_v.c b/net/batman-adv/bat_v.c
index d9cb5c4922c1..ff31f2af9cfe 100644
--- a/net/batman-adv/bat_v.c
+++ b/net/batman-adv/bat_v.c
@@ -21,6 +21,7 @@
#include <linux/atomic.h>
#include <linux/cache.h>
#include <linux/init.h>
+#include <linux/workqueue.h>
#include "bat_v_elp.h"
#include "bat_v_ogm.h"
@@ -65,6 +66,8 @@ static void
batadv_v_hardif_neigh_init(struct batadv_hardif_neigh_node *hardif_neigh)
{
ewma_throughput_init(&hardif_neigh->bat_v.throughput);
+ INIT_WORK(&hardif_neigh->bat_v.metric_work,
+ batadv_v_elp_throughput_metric_update);
}
static void batadv_v_ogm_schedule(struct batadv_hard_iface *hard_iface)