diff options
Diffstat (limited to 'net/batman-adv/gateway_client.c')
-rw-r--r-- | net/batman-adv/gateway_client.c | 217 |
1 files changed, 28 insertions, 189 deletions
diff --git a/net/batman-adv/gateway_client.c b/net/batman-adv/gateway_client.c index 63a805d..ec363f3 100644 --- a/net/batman-adv/gateway_client.c +++ b/net/batman-adv/gateway_client.c @@ -80,12 +80,12 @@ static void batadv_gw_node_release(struct kref *ref) * batadv_gw_node_put - decrement the gw_node refcounter and possibly release it * @gw_node: gateway node to free */ -static void batadv_gw_node_put(struct batadv_gw_node *gw_node) +void batadv_gw_node_put(struct batadv_gw_node *gw_node) { kref_put(&gw_node->refcount, batadv_gw_node_release); } -static struct batadv_gw_node * +struct batadv_gw_node * batadv_gw_get_selected_gw_node(struct batadv_priv *bat_priv) { struct batadv_gw_node *gw_node; @@ -164,86 +164,6 @@ void batadv_gw_reselect(struct batadv_priv *bat_priv) atomic_set(&bat_priv->gw.reselect, 1); } -static struct batadv_gw_node * -batadv_gw_get_best_gw_node(struct batadv_priv *bat_priv) -{ - struct batadv_neigh_node *router; - struct batadv_neigh_ifinfo *router_ifinfo; - struct batadv_gw_node *gw_node, *curr_gw = NULL; - u64 max_gw_factor = 0; - u64 tmp_gw_factor = 0; - u8 max_tq = 0; - u8 tq_avg; - struct batadv_orig_node *orig_node; - - rcu_read_lock(); - hlist_for_each_entry_rcu(gw_node, &bat_priv->gw.list, list) { - orig_node = gw_node->orig_node; - router = batadv_orig_router_get(orig_node, BATADV_IF_DEFAULT); - if (!router) - continue; - - router_ifinfo = batadv_neigh_ifinfo_get(router, - BATADV_IF_DEFAULT); - if (!router_ifinfo) - goto next; - - if (!kref_get_unless_zero(&gw_node->refcount)) - goto next; - - tq_avg = router_ifinfo->bat_iv.tq_avg; - - switch (atomic_read(&bat_priv->gw.sel_class)) { - case 1: /* fast connection */ - tmp_gw_factor = tq_avg * tq_avg; - tmp_gw_factor *= gw_node->bandwidth_down; - tmp_gw_factor *= 100 * 100; - tmp_gw_factor >>= 18; - - if ((tmp_gw_factor > max_gw_factor) || - ((tmp_gw_factor == max_gw_factor) && - (tq_avg > max_tq))) { - if (curr_gw) - batadv_gw_node_put(curr_gw); - curr_gw = gw_node; - kref_get(&curr_gw->refcount); - } - break; - - default: /* 2: stable connection (use best statistic) - * 3: fast-switch (use best statistic but change as - * soon as a better gateway appears) - * XX: late-switch (use best statistic but change as - * soon as a better gateway appears which has - * $routing_class more tq points) - */ - if (tq_avg > max_tq) { - if (curr_gw) - batadv_gw_node_put(curr_gw); - curr_gw = gw_node; - kref_get(&curr_gw->refcount); - } - break; - } - - if (tq_avg > max_tq) - max_tq = tq_avg; - - if (tmp_gw_factor > max_gw_factor) - max_gw_factor = tmp_gw_factor; - - batadv_gw_node_put(gw_node); - -next: - batadv_neigh_node_put(router); - if (router_ifinfo) - batadv_neigh_ifinfo_put(router_ifinfo); - } - rcu_read_unlock(); - - 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 @@ -287,12 +207,19 @@ void batadv_gw_election(struct batadv_priv *bat_priv) if (atomic_read(&bat_priv->gw.mode) != BATADV_GW_MODE_CLIENT) goto out; + if (!bat_priv->algo_ops->gw.get_best_gw_node) + goto out; + curr_gw = batadv_gw_get_selected_gw_node(bat_priv); if (!batadv_atomic_dec_not_zero(&bat_priv->gw.reselect) && curr_gw) goto out; - next_gw = batadv_gw_get_best_gw_node(bat_priv); + /* if gw.reselect is set to 1 it means that a previous call to + * gw.is_eligible() said that we have a new best GW, therefore it can + * now be picked from the list and selected + */ + next_gw = bat_priv->algo_ops->gw.get_best_gw_node(bat_priv); if (curr_gw == next_gw) goto out; @@ -360,70 +287,31 @@ out: void batadv_gw_check_election(struct batadv_priv *bat_priv, struct batadv_orig_node *orig_node) { - struct batadv_neigh_ifinfo *router_orig_tq = NULL; - struct batadv_neigh_ifinfo *router_gw_tq = NULL; struct batadv_orig_node *curr_gw_orig; - struct batadv_neigh_node *router_gw = NULL; - struct batadv_neigh_node *router_orig = NULL; - u8 gw_tq_avg, orig_tq_avg; + + /* abort immediately if the routing algorithm does not support gateway + * election + */ + if (!bat_priv->algo_ops->gw.is_eligible) + return; curr_gw_orig = batadv_gw_get_selected_orig(bat_priv); if (!curr_gw_orig) goto reselect; - router_gw = batadv_orig_router_get(curr_gw_orig, BATADV_IF_DEFAULT); - if (!router_gw) - goto reselect; - - router_gw_tq = batadv_neigh_ifinfo_get(router_gw, - BATADV_IF_DEFAULT); - if (!router_gw_tq) - goto reselect; - /* this node already is the gateway */ if (curr_gw_orig == orig_node) goto out; - router_orig = batadv_orig_router_get(orig_node, BATADV_IF_DEFAULT); - if (!router_orig) - goto out; - - router_orig_tq = batadv_neigh_ifinfo_get(router_orig, - BATADV_IF_DEFAULT); - if (!router_orig_tq) - goto out; - - gw_tq_avg = router_gw_tq->bat_iv.tq_avg; - orig_tq_avg = router_orig_tq->bat_iv.tq_avg; - - /* the TQ value has to be better */ - if (orig_tq_avg < gw_tq_avg) + if (!bat_priv->algo_ops->gw.is_eligible(bat_priv, curr_gw_orig, + orig_node)) goto out; - /* if the routing class is greater than 3 the value tells us how much - * greater the TQ value of the new gateway must be - */ - if ((atomic_read(&bat_priv->gw.sel_class) > 3) && - (orig_tq_avg - gw_tq_avg < atomic_read(&bat_priv->gw.sel_class))) - goto out; - - batadv_dbg(BATADV_DBG_BATMAN, bat_priv, - "Restarting gateway selection: better gateway found (tq curr: %i, tq new: %i)\n", - gw_tq_avg, orig_tq_avg); - reselect: batadv_gw_reselect(bat_priv); out: if (curr_gw_orig) batadv_orig_node_put(curr_gw_orig); - if (router_gw) - batadv_neigh_node_put(router_gw); - if (router_orig) - batadv_neigh_node_put(router_orig); - if (router_gw_tq) - batadv_neigh_ifinfo_put(router_gw_tq); - if (router_orig_tq) - batadv_neigh_ifinfo_put(router_orig_tq); } /** @@ -585,80 +473,31 @@ void batadv_gw_node_free(struct batadv_priv *bat_priv) spin_unlock_bh(&bat_priv->gw.list_lock); } -/* fails if orig_node has no router */ -static int batadv_write_buffer_text(struct batadv_priv *bat_priv, - struct seq_file *seq, - const struct batadv_gw_node *gw_node) -{ - struct batadv_gw_node *curr_gw; - struct batadv_neigh_node *router; - struct batadv_neigh_ifinfo *router_ifinfo = NULL; - int ret = -1; - - router = batadv_orig_router_get(gw_node->orig_node, BATADV_IF_DEFAULT); - if (!router) - goto out; - - router_ifinfo = batadv_neigh_ifinfo_get(router, BATADV_IF_DEFAULT); - if (!router_ifinfo) - goto out; - - curr_gw = batadv_gw_get_selected_gw_node(bat_priv); - - seq_printf(seq, "%s %pM (%3i) %pM [%10s]: %u.%u/%u.%u MBit\n", - (curr_gw == gw_node ? "=>" : " "), - gw_node->orig_node->orig, - router_ifinfo->bat_iv.tq_avg, router->addr, - router->if_incoming->net_dev->name, - gw_node->bandwidth_down / 10, - gw_node->bandwidth_down % 10, - gw_node->bandwidth_up / 10, - gw_node->bandwidth_up % 10); - ret = seq_has_overflowed(seq) ? -1 : 0; - - if (curr_gw) - batadv_gw_node_put(curr_gw); -out: - if (router_ifinfo) - batadv_neigh_ifinfo_put(router_ifinfo); - if (router) - batadv_neigh_node_put(router); - return ret; -} - int batadv_gw_client_seq_print_text(struct seq_file *seq, void *offset) { struct net_device *net_dev = (struct net_device *)seq->private; struct batadv_priv *bat_priv = netdev_priv(net_dev); struct batadv_hard_iface *primary_if; - struct batadv_gw_node *gw_node; - int gw_count = 0; primary_if = batadv_seq_print_text_primary_if_get(seq); if (!primary_if) - goto out; + return 0; - seq_printf(seq, - " Gateway (#/255) Nexthop [outgoingIF]: advertised uplink bandwidth ... [B.A.T.M.A.N. adv %s, MainIF/MAC: %s/%pM (%s)]\n", + seq_printf(seq, "[B.A.T.M.A.N. adv %s, MainIF/MAC: %s/%pM (%s %s)]\n", BATADV_SOURCE_VERSION, primary_if->net_dev->name, - primary_if->net_dev->dev_addr, net_dev->name); + primary_if->net_dev->dev_addr, net_dev->name, + bat_priv->algo_ops->name); - rcu_read_lock(); - hlist_for_each_entry_rcu(gw_node, &bat_priv->gw.list, list) { - /* fails if orig_node has no router */ - if (batadv_write_buffer_text(bat_priv, seq, gw_node) < 0) - continue; + batadv_hardif_put(primary_if); - gw_count++; + if (!bat_priv->algo_ops->gw.print) { + seq_puts(seq, + "No printing function for this routing protocol\n"); + return 0; } - rcu_read_unlock(); - if (gw_count == 0) - seq_puts(seq, "No gateways in range ...\n"); + bat_priv->algo_ops->gw.print(bat_priv, seq); -out: - if (primary_if) - batadv_hardif_put(primary_if); return 0; } |