batman-adv: throw uevent in userspace on gateway add/change/del event

In case of new default gw, changing the default gw or deleting the default gw a
uevent is triggered with type=gw, action=add/change/del and
data={GW_ORIG_ADDRESS} (if any).

Signed-off-by: Antonio Quartulli <ordex@autistici.org>
Signed-off-by: Marek Lindner <lindner_marek@yahoo.de>
Signed-off-by: Sven Eckelmann <sven@narfation.org>

1 files changed, 6 insertions, 0 deletions

diff --git a/net/batman-adv/gateway_client.c b/net/batman-adv/gateway_client.c
index 0350c0cd690e..6381864c1ca4 100644
--- a/net/batman-adv/gateway_client.c
+++ b/net/batman-adv/gateway_client.c
@@ -179,6 +179,7 @@ void gw_election(struct bat_priv *bat_priv)
 {
         struct gw_node *curr_gw = NULL, *next_gw = NULL;
         struct neigh_node *router = NULL;
+        char gw_addr[18] = { '\0' };
 
         /**
          * The batman daemon checks here if we already passed a full originator
@@ -200,6 +201,8 @@ void gw_election(struct bat_priv *bat_priv)
                 goto out;
 
         if (next_gw) {
+                sprintf(gw_addr, "%pM", next_gw->orig_node->orig);
+
                 router = orig_node_get_router(next_gw->orig_node);
                 if (!router) {
                         gw_deselect(bat_priv);
@@ -210,12 +213,14 @@ void gw_election(struct bat_priv *bat_priv)
         if ((curr_gw) && (!next_gw)) {
                 bat_dbg(DBG_BATMAN, bat_priv,
                         "Removing selected gateway - no gateway in range\n");
+                throw_uevent(bat_priv, UEV_GW, UEV_DEL, NULL);
         } else if ((!curr_gw) && (next_gw)) {
                 bat_dbg(DBG_BATMAN, bat_priv,
                         "Adding route to gateway %pM (gw_flags: %i, tq: %i)\n",
                         next_gw->orig_node->orig,
                         next_gw->orig_node->gw_flags,
                         router->tq_avg);
+                throw_uevent(bat_priv, UEV_GW, UEV_ADD, gw_addr);
         } else {
                 bat_dbg(DBG_BATMAN, bat_priv,
                         "Changing route to gateway %pM "
@@ -223,6 +228,7 @@ void gw_election(struct bat_priv *bat_priv)
                         next_gw->orig_node->orig,
                         next_gw->orig_node->gw_flags,
                         router->tq_avg);
+                throw_uevent(bat_priv, UEV_GW, UEV_CHANGE, gw_addr);
         }
 
         gw_select(bat_priv, next_gw);