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authorAntonio Quartulli <antonio@open-mesh.com>2013-07-13 00:06:00 +0200
committerAntonio Quartulli <ordex@autistici.org>2013-08-28 11:33:00 +0200
commitc6eaa3f067d6f9fa55fd9645e93ed79411bebdaf (patch)
treee5d5136abe4c857cae4b04985c22c38ccbeaca71 /net/batman-adv
parentc00a072d3fec446d763e68b50f6f6cfd9e2957e2 (diff)
downloadop-kernel-dev-c6eaa3f067d6f9fa55fd9645e93ed79411bebdaf.zip
op-kernel-dev-c6eaa3f067d6f9fa55fd9645e93ed79411bebdaf.tar.gz
batman-adv: send GW_DEL event when the gw client mode is deselected
Whenever the GW client mode is deselected, a DEL event has to be sent in order to tell userspace that the current gateway has been lost. Send the uevent on state change only if a gateway was currently selected. Reported-by: Marek Lindner <lindner_marek@yahoo.de> Signed-off-by: Antonio Quartulli <antonio@open-mesh.com> Signed-off-by: Marek Lindner <lindner_marek@yahoo.de>
Diffstat (limited to 'net/batman-adv')
-rw-r--r--net/batman-adv/gateway_client.c27
-rw-r--r--net/batman-adv/gateway_client.h1
-rw-r--r--net/batman-adv/sysfs.c4
3 files changed, 32 insertions, 0 deletions
diff --git a/net/batman-adv/gateway_client.c b/net/batman-adv/gateway_client.c
index 7614af3..1ce4b87 100644
--- a/net/batman-adv/gateway_client.c
+++ b/net/batman-adv/gateway_client.c
@@ -190,6 +190,33 @@ next:
return curr_gw;
}
+/**
+ * batadv_gw_check_client_stop - check if client mode has been switched off
+ * @bat_priv: the bat priv with all the soft interface information
+ *
+ * This function assumes the caller has checked that the gw state *is actually
+ * changing*. This function is not supposed to be called when there is no state
+ * change.
+ */
+void batadv_gw_check_client_stop(struct batadv_priv *bat_priv)
+{
+ struct batadv_gw_node *curr_gw;
+
+ if (atomic_read(&bat_priv->gw_mode) != BATADV_GW_MODE_CLIENT)
+ return;
+
+ curr_gw = batadv_gw_get_selected_gw_node(bat_priv);
+ if (!curr_gw)
+ return;
+
+ /* if batman-adv is switching the gw client mode off and a gateway was
+ * already selected, send a DEL uevent
+ */
+ batadv_throw_uevent(bat_priv, BATADV_UEV_GW, BATADV_UEV_DEL, NULL);
+
+ batadv_gw_node_free_ref(curr_gw);
+}
+
void batadv_gw_election(struct batadv_priv *bat_priv)
{
struct batadv_gw_node *curr_gw = NULL, *next_gw = NULL;
diff --git a/net/batman-adv/gateway_client.h b/net/batman-adv/gateway_client.h
index 1037d75..ceef4eb 100644
--- a/net/batman-adv/gateway_client.h
+++ b/net/batman-adv/gateway_client.h
@@ -20,6 +20,7 @@
#ifndef _NET_BATMAN_ADV_GATEWAY_CLIENT_H_
#define _NET_BATMAN_ADV_GATEWAY_CLIENT_H_
+void batadv_gw_check_client_stop(struct batadv_priv *bat_priv);
void batadv_gw_deselect(struct batadv_priv *bat_priv);
void batadv_gw_election(struct batadv_priv *bat_priv);
struct batadv_orig_node *
diff --git a/net/batman-adv/sysfs.c b/net/batman-adv/sysfs.c
index 929e304..4114b96 100644
--- a/net/batman-adv/sysfs.c
+++ b/net/batman-adv/sysfs.c
@@ -385,6 +385,10 @@ static ssize_t batadv_store_gw_mode(struct kobject *kobj,
curr_gw_mode_str, buff);
batadv_gw_deselect(bat_priv);
+ /* always call batadv_gw_check_client_stop() before changing the gateway
+ * state
+ */
+ batadv_gw_check_client_stop(bat_priv);
atomic_set(&bat_priv->gw_mode, (unsigned int)gw_mode_tmp);
return count;
}
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