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authorSimon Wunderlich <simon.wunderlich@s2003.tu-chemnitz.de>2012-09-09 22:27:57 +0200
committerAntonio Quartulli <ordex@autistici.org>2012-11-14 21:00:34 +0100
commitd807f2728708c54a1ac1ce04d4549d8eb2b996d2 (patch)
tree69f48c87df4c09ecc1b70c6be73a414eea93822f /net/batman-adv
parentbatman-adv: send announcement when backbone gw is registered (diff)
downloadlinux-d807f2728708c54a1ac1ce04d4549d8eb2b996d2.tar.xz
linux-d807f2728708c54a1ac1ce04d4549d8eb2b996d2.zip
batman-adv: allow bla traffic only after first worker period
When adding a backbone gateway for the first time, it might not yet be known in the backbone, and therefore we should not forward broadcasts yet. This behaviour is the same as when sending a request to another backbone gw because of a CRC mismatch. The backbone gw will operate normal after the next periodic bla work. Signed-off-by: Simon Wunderlich <siwu@hrz.tu-chemnitz.de> Signed-off-by: Antonio Quartulli <ordex@autistici.org>
Diffstat (limited to 'net/batman-adv')
-rw-r--r--net/batman-adv/bridge_loop_avoidance.c20
1 files changed, 19 insertions, 1 deletions
diff --git a/net/batman-adv/bridge_loop_avoidance.c b/net/batman-adv/bridge_loop_avoidance.c
index c49cf24ab33d..8cd97d59ee61 100644
--- a/net/batman-adv/bridge_loop_avoidance.c
+++ b/net/batman-adv/bridge_loop_avoidance.c
@@ -402,9 +402,14 @@ batadv_bla_get_backbone_gw(struct batadv_priv *bat_priv, uint8_t *orig,
batadv_orig_node_free_ref(orig_node);
}
- if (own_backbone)
+ if (own_backbone) {
batadv_bla_send_announce(bat_priv, entry);
+ /* this will be decreased in the worker thread */
+ atomic_inc(&entry->request_sent);
+ atomic_inc(&bat_priv->bla.num_requests);
+ }
+
return entry;
}
@@ -1138,6 +1143,19 @@ static void batadv_bla_periodic_work(struct work_struct *work)
backbone_gw->lasttime = jiffies;
batadv_bla_send_announce(bat_priv, backbone_gw);
+
+ /* request_sent is only set after creation to avoid
+ * problems when we are not yet known as backbone gw
+ * in the backbone.
+ *
+ * We can reset this now and allow traffic again.
+ */
+
+ if (atomic_read(&backbone_gw->request_sent) == 0)
+ continue;
+
+ atomic_dec(&backbone_gw->bat_priv->bla.num_requests);
+ atomic_set(&backbone_gw->request_sent, 0);
}
rcu_read_unlock();
}