diff options
Diffstat (limited to 'net/batman-adv/routing.c')
| -rw-r--r-- | net/batman-adv/routing.c | 38 |
1 files changed, 33 insertions, 5 deletions
diff --git a/net/batman-adv/routing.c b/net/batman-adv/routing.c index 4fd2687b88c..55e9aebcbc8 100644 --- a/net/batman-adv/routing.c +++ b/net/batman-adv/routing.c @@ -33,13 +33,32 @@ static int batadv_route_unicast_packet(struct sk_buff *skb, struct batadv_hard_iface *recv_if); +/** + * _batadv_update_route - set the router for this originator + * @bat_priv: the bat priv with all the soft interface information + * @orig_node: orig node which is to be configured + * @recv_if: the receive interface for which this route is set + * @neigh_node: neighbor which should be the next router + * + * This function does not perform any error checks + */ static void _batadv_update_route(struct batadv_priv *bat_priv, struct batadv_orig_node *orig_node, + struct batadv_hard_iface *recv_if, struct batadv_neigh_node *neigh_node) { + struct batadv_orig_ifinfo *orig_ifinfo; struct batadv_neigh_node *curr_router; - curr_router = batadv_orig_node_get_router(orig_node); + orig_ifinfo = batadv_orig_ifinfo_get(orig_node, recv_if); + if (!orig_ifinfo) + return; + + rcu_read_lock(); + curr_router = rcu_dereference(orig_ifinfo->router); + if (curr_router && !atomic_inc_not_zero(&curr_router->refcount)) + curr_router = NULL; + rcu_read_unlock(); /* route deleted */ if ((curr_router) && (!neigh_node)) { @@ -69,16 +88,25 @@ static void _batadv_update_route(struct batadv_priv *bat_priv, neigh_node = NULL; spin_lock_bh(&orig_node->neigh_list_lock); - rcu_assign_pointer(orig_node->router, neigh_node); + rcu_assign_pointer(orig_ifinfo->router, neigh_node); spin_unlock_bh(&orig_node->neigh_list_lock); + batadv_orig_ifinfo_free_ref(orig_ifinfo); /* decrease refcount of previous best neighbor */ if (curr_router) batadv_neigh_node_free_ref(curr_router); } +/** + * batadv_update_route - set the router for this originator + * @bat_priv: the bat priv with all the soft interface information + * @orig_node: orig node which is to be configured + * @recv_if: the receive interface for which this route is set + * @neigh_node: neighbor which should be the next router + */ void batadv_update_route(struct batadv_priv *bat_priv, struct batadv_orig_node *orig_node, + struct batadv_hard_iface *recv_if, struct batadv_neigh_node *neigh_node) { struct batadv_neigh_node *router = NULL; @@ -86,10 +114,10 @@ void batadv_update_route(struct batadv_priv *bat_priv, if (!orig_node) goto out; - router = batadv_orig_node_get_router(orig_node); + router = batadv_orig_router_get(orig_node, recv_if); if (router != neigh_node) - _batadv_update_route(bat_priv, orig_node, neigh_node); + _batadv_update_route(bat_priv, orig_node, recv_if, neigh_node); out: if (router) @@ -406,7 +434,7 @@ batadv_find_router(struct batadv_priv *bat_priv, if (!orig_node) return NULL; - router = batadv_orig_node_get_router(orig_node); + router = batadv_orig_router_get(orig_node, recv_if); /* TODO: fill this later with new bonding mechanism */ |