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70ea5cee95
The batman-adv codebase is using "list" for the list node (prev/next) and <list content descriptor>+"_list" for the head of a list. Not using this naming scheme can up in confusions when reading the code. Signed-off-by: Sven Eckelmann <sven@narfation.org> Signed-off-by: Simon Wunderlich <sw@simonwunderlich.de>
1147 lines
30 KiB
C
1147 lines
30 KiB
C
/* Copyright (C) 2013-2016 B.A.T.M.A.N. contributors:
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*
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* Linus Lüssing, Marek Lindner
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of version 2 of the GNU General Public
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* License as published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, see <http://www.gnu.org/licenses/>.
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*/
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#include "bat_v.h"
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#include "main.h"
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#include <linux/atomic.h>
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#include <linux/bug.h>
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#include <linux/cache.h>
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#include <linux/errno.h>
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#include <linux/if_ether.h>
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#include <linux/init.h>
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#include <linux/jiffies.h>
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#include <linux/kernel.h>
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#include <linux/kref.h>
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#include <linux/netdevice.h>
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#include <linux/netlink.h>
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#include <linux/rculist.h>
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#include <linux/rcupdate.h>
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#include <linux/seq_file.h>
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#include <linux/stddef.h>
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#include <linux/types.h>
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#include <linux/workqueue.h>
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#include <net/genetlink.h>
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#include <net/netlink.h>
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#include <uapi/linux/batman_adv.h>
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#include "bat_algo.h"
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#include "bat_v_elp.h"
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#include "bat_v_ogm.h"
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#include "gateway_client.h"
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#include "gateway_common.h"
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#include "hard-interface.h"
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#include "hash.h"
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#include "log.h"
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#include "netlink.h"
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#include "originator.h"
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#include "packet.h"
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struct sk_buff;
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static void batadv_v_iface_activate(struct batadv_hard_iface *hard_iface)
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{
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struct batadv_priv *bat_priv = netdev_priv(hard_iface->soft_iface);
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struct batadv_hard_iface *primary_if;
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primary_if = batadv_primary_if_get_selected(bat_priv);
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if (primary_if) {
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batadv_v_elp_iface_activate(primary_if, hard_iface);
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batadv_hardif_put(primary_if);
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}
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/* B.A.T.M.A.N. V does not use any queuing mechanism, therefore it can
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* set the interface as ACTIVE right away, without any risk of race
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* condition
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*/
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if (hard_iface->if_status == BATADV_IF_TO_BE_ACTIVATED)
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hard_iface->if_status = BATADV_IF_ACTIVE;
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}
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static int batadv_v_iface_enable(struct batadv_hard_iface *hard_iface)
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{
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int ret;
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ret = batadv_v_elp_iface_enable(hard_iface);
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if (ret < 0)
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return ret;
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ret = batadv_v_ogm_iface_enable(hard_iface);
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if (ret < 0)
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batadv_v_elp_iface_disable(hard_iface);
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return ret;
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}
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static void batadv_v_iface_disable(struct batadv_hard_iface *hard_iface)
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{
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batadv_v_elp_iface_disable(hard_iface);
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}
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static void batadv_v_primary_iface_set(struct batadv_hard_iface *hard_iface)
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{
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batadv_v_elp_primary_iface_set(hard_iface);
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batadv_v_ogm_primary_iface_set(hard_iface);
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}
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/**
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* batadv_v_iface_update_mac - react to hard-interface MAC address change
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* @hard_iface: the modified interface
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*
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* If the modified interface is the primary one, update the originator
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* address in the ELP and OGM messages to reflect the new MAC address.
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*/
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static void batadv_v_iface_update_mac(struct batadv_hard_iface *hard_iface)
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{
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struct batadv_priv *bat_priv = netdev_priv(hard_iface->soft_iface);
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struct batadv_hard_iface *primary_if;
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primary_if = batadv_primary_if_get_selected(bat_priv);
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if (primary_if != hard_iface)
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goto out;
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batadv_v_primary_iface_set(hard_iface);
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out:
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if (primary_if)
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batadv_hardif_put(primary_if);
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}
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static void
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batadv_v_hardif_neigh_init(struct batadv_hardif_neigh_node *hardif_neigh)
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{
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ewma_throughput_init(&hardif_neigh->bat_v.throughput);
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INIT_WORK(&hardif_neigh->bat_v.metric_work,
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batadv_v_elp_throughput_metric_update);
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}
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#ifdef CONFIG_BATMAN_ADV_DEBUGFS
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/**
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* batadv_v_orig_print_neigh - print neighbors for the originator table
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* @orig_node: the orig_node for which the neighbors are printed
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* @if_outgoing: outgoing interface for these entries
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* @seq: debugfs table seq_file struct
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*
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* Must be called while holding an rcu lock.
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*/
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static void
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batadv_v_orig_print_neigh(struct batadv_orig_node *orig_node,
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struct batadv_hard_iface *if_outgoing,
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struct seq_file *seq)
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{
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struct batadv_neigh_node *neigh_node;
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struct batadv_neigh_ifinfo *n_ifinfo;
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hlist_for_each_entry_rcu(neigh_node, &orig_node->neigh_list, list) {
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n_ifinfo = batadv_neigh_ifinfo_get(neigh_node, if_outgoing);
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if (!n_ifinfo)
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continue;
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seq_printf(seq, " %pM (%9u.%1u)",
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neigh_node->addr,
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n_ifinfo->bat_v.throughput / 10,
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n_ifinfo->bat_v.throughput % 10);
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batadv_neigh_ifinfo_put(n_ifinfo);
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}
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}
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/**
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* batadv_v_hardif_neigh_print - print a single ELP neighbour node
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* @seq: neighbour table seq_file struct
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* @hardif_neigh: hardif neighbour information
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*/
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static void
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batadv_v_hardif_neigh_print(struct seq_file *seq,
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struct batadv_hardif_neigh_node *hardif_neigh)
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{
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int last_secs, last_msecs;
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u32 throughput;
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last_secs = jiffies_to_msecs(jiffies - hardif_neigh->last_seen) / 1000;
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last_msecs = jiffies_to_msecs(jiffies - hardif_neigh->last_seen) % 1000;
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throughput = ewma_throughput_read(&hardif_neigh->bat_v.throughput);
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seq_printf(seq, "%pM %4i.%03is (%9u.%1u) [%10s]\n",
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hardif_neigh->addr, last_secs, last_msecs, throughput / 10,
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throughput % 10, hardif_neigh->if_incoming->net_dev->name);
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}
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/**
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* batadv_v_neigh_print - print the single hop neighbour list
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* @bat_priv: the bat priv with all the soft interface information
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* @seq: neighbour table seq_file struct
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*/
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static void batadv_v_neigh_print(struct batadv_priv *bat_priv,
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struct seq_file *seq)
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{
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struct net_device *net_dev = (struct net_device *)seq->private;
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struct batadv_hardif_neigh_node *hardif_neigh;
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struct batadv_hard_iface *hard_iface;
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int batman_count = 0;
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seq_puts(seq,
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" Neighbor last-seen ( throughput) [ IF]\n");
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rcu_read_lock();
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list_for_each_entry_rcu(hard_iface, &batadv_hardif_list, list) {
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if (hard_iface->soft_iface != net_dev)
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continue;
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hlist_for_each_entry_rcu(hardif_neigh,
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&hard_iface->neigh_list, list) {
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batadv_v_hardif_neigh_print(seq, hardif_neigh);
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batman_count++;
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}
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}
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rcu_read_unlock();
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if (batman_count == 0)
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seq_puts(seq, "No batman nodes in range ...\n");
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}
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#endif
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/**
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* batadv_v_neigh_dump_neigh - Dump a neighbour into a message
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* @msg: Netlink message to dump into
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* @portid: Port making netlink request
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* @seq: Sequence number of netlink message
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* @hardif_neigh: Neighbour to dump
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*
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* Return: Error code, or 0 on success
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*/
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static int
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batadv_v_neigh_dump_neigh(struct sk_buff *msg, u32 portid, u32 seq,
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struct batadv_hardif_neigh_node *hardif_neigh)
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{
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void *hdr;
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unsigned int last_seen_msecs;
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u32 throughput;
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last_seen_msecs = jiffies_to_msecs(jiffies - hardif_neigh->last_seen);
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throughput = ewma_throughput_read(&hardif_neigh->bat_v.throughput);
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throughput = throughput * 100;
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hdr = genlmsg_put(msg, portid, seq, &batadv_netlink_family, NLM_F_MULTI,
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BATADV_CMD_GET_NEIGHBORS);
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if (!hdr)
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return -ENOBUFS;
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if (nla_put(msg, BATADV_ATTR_NEIGH_ADDRESS, ETH_ALEN,
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hardif_neigh->addr) ||
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nla_put_u32(msg, BATADV_ATTR_HARD_IFINDEX,
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hardif_neigh->if_incoming->net_dev->ifindex) ||
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nla_put_u32(msg, BATADV_ATTR_LAST_SEEN_MSECS,
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last_seen_msecs) ||
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nla_put_u32(msg, BATADV_ATTR_THROUGHPUT, throughput))
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goto nla_put_failure;
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genlmsg_end(msg, hdr);
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return 0;
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nla_put_failure:
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genlmsg_cancel(msg, hdr);
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return -EMSGSIZE;
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}
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/**
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* batadv_v_neigh_dump_hardif - Dump the neighbours of a hard interface into
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* a message
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* @msg: Netlink message to dump into
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* @portid: Port making netlink request
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* @seq: Sequence number of netlink message
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* @bat_priv: The bat priv with all the soft interface information
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* @hard_iface: The hard interface to be dumped
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* @idx_s: Entries to be skipped
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*
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* This function assumes the caller holds rcu_read_lock().
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*
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* Return: Error code, or 0 on success
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*/
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static int
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batadv_v_neigh_dump_hardif(struct sk_buff *msg, u32 portid, u32 seq,
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struct batadv_priv *bat_priv,
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struct batadv_hard_iface *hard_iface,
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int *idx_s)
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{
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struct batadv_hardif_neigh_node *hardif_neigh;
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int idx = 0;
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hlist_for_each_entry_rcu(hardif_neigh,
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&hard_iface->neigh_list, list) {
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if (idx++ < *idx_s)
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continue;
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if (batadv_v_neigh_dump_neigh(msg, portid, seq, hardif_neigh)) {
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*idx_s = idx - 1;
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return -EMSGSIZE;
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}
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}
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*idx_s = 0;
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return 0;
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}
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/**
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* batadv_v_neigh_dump - Dump the neighbours of a hard interface into a
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* message
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* @msg: Netlink message to dump into
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* @cb: Control block containing additional options
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* @bat_priv: The bat priv with all the soft interface information
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* @single_hardif: Limit dumping to this hard interface
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*/
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static void
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batadv_v_neigh_dump(struct sk_buff *msg, struct netlink_callback *cb,
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struct batadv_priv *bat_priv,
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struct batadv_hard_iface *single_hardif)
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{
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struct batadv_hard_iface *hard_iface;
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int i_hardif = 0;
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int i_hardif_s = cb->args[0];
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int idx = cb->args[1];
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int portid = NETLINK_CB(cb->skb).portid;
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rcu_read_lock();
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if (single_hardif) {
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if (i_hardif_s == 0) {
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if (batadv_v_neigh_dump_hardif(msg, portid,
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cb->nlh->nlmsg_seq,
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bat_priv, single_hardif,
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&idx) == 0)
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i_hardif++;
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}
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} else {
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list_for_each_entry_rcu(hard_iface, &batadv_hardif_list, list) {
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if (hard_iface->soft_iface != bat_priv->soft_iface)
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continue;
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if (i_hardif++ < i_hardif_s)
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continue;
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if (batadv_v_neigh_dump_hardif(msg, portid,
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cb->nlh->nlmsg_seq,
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bat_priv, hard_iface,
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&idx)) {
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i_hardif--;
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break;
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}
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}
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}
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rcu_read_unlock();
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cb->args[0] = i_hardif;
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cb->args[1] = idx;
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}
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#ifdef CONFIG_BATMAN_ADV_DEBUGFS
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/**
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* batadv_v_orig_print - print the originator table
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* @bat_priv: the bat priv with all the soft interface information
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* @seq: debugfs table seq_file struct
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* @if_outgoing: the outgoing interface for which this should be printed
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*/
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static void batadv_v_orig_print(struct batadv_priv *bat_priv,
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struct seq_file *seq,
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struct batadv_hard_iface *if_outgoing)
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{
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struct batadv_neigh_node *neigh_node;
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struct batadv_hashtable *hash = bat_priv->orig_hash;
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int last_seen_msecs, last_seen_secs;
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struct batadv_orig_node *orig_node;
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struct batadv_neigh_ifinfo *n_ifinfo;
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unsigned long last_seen_jiffies;
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struct hlist_head *head;
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int batman_count = 0;
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u32 i;
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seq_puts(seq,
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" Originator last-seen ( throughput) Nexthop [outgoingIF]: Potential nexthops ...\n");
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for (i = 0; i < hash->size; i++) {
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head = &hash->table[i];
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rcu_read_lock();
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hlist_for_each_entry_rcu(orig_node, head, hash_entry) {
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neigh_node = batadv_orig_router_get(orig_node,
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if_outgoing);
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if (!neigh_node)
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continue;
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n_ifinfo = batadv_neigh_ifinfo_get(neigh_node,
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if_outgoing);
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if (!n_ifinfo)
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goto next;
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last_seen_jiffies = jiffies - orig_node->last_seen;
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last_seen_msecs = jiffies_to_msecs(last_seen_jiffies);
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last_seen_secs = last_seen_msecs / 1000;
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last_seen_msecs = last_seen_msecs % 1000;
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seq_printf(seq, "%pM %4i.%03is (%9u.%1u) %pM [%10s]:",
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orig_node->orig, last_seen_secs,
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last_seen_msecs,
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n_ifinfo->bat_v.throughput / 10,
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n_ifinfo->bat_v.throughput % 10,
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neigh_node->addr,
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neigh_node->if_incoming->net_dev->name);
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batadv_v_orig_print_neigh(orig_node, if_outgoing, seq);
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seq_puts(seq, "\n");
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batman_count++;
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next:
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batadv_neigh_node_put(neigh_node);
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if (n_ifinfo)
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batadv_neigh_ifinfo_put(n_ifinfo);
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}
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rcu_read_unlock();
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}
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if (batman_count == 0)
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seq_puts(seq, "No batman nodes in range ...\n");
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}
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#endif
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/**
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* batadv_v_orig_dump_subentry - Dump an originator subentry into a
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* message
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* @msg: Netlink message to dump into
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* @portid: Port making netlink request
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* @seq: Sequence number of netlink message
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* @bat_priv: The bat priv with all the soft interface information
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* @if_outgoing: Limit dump to entries with this outgoing interface
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* @orig_node: Originator to dump
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* @neigh_node: Single hops neighbour
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* @best: Is the best originator
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*
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* Return: Error code, or 0 on success
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*/
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static int
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batadv_v_orig_dump_subentry(struct sk_buff *msg, u32 portid, u32 seq,
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struct batadv_priv *bat_priv,
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struct batadv_hard_iface *if_outgoing,
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struct batadv_orig_node *orig_node,
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struct batadv_neigh_node *neigh_node,
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bool best)
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{
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struct batadv_neigh_ifinfo *n_ifinfo;
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unsigned int last_seen_msecs;
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u32 throughput;
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void *hdr;
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n_ifinfo = batadv_neigh_ifinfo_get(neigh_node, if_outgoing);
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if (!n_ifinfo)
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return 0;
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throughput = n_ifinfo->bat_v.throughput * 100;
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batadv_neigh_ifinfo_put(n_ifinfo);
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last_seen_msecs = jiffies_to_msecs(jiffies - orig_node->last_seen);
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if (if_outgoing != BATADV_IF_DEFAULT &&
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if_outgoing != neigh_node->if_incoming)
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return 0;
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hdr = genlmsg_put(msg, portid, seq, &batadv_netlink_family, NLM_F_MULTI,
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BATADV_CMD_GET_ORIGINATORS);
|
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if (!hdr)
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return -ENOBUFS;
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|
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if (nla_put(msg, BATADV_ATTR_ORIG_ADDRESS, ETH_ALEN, orig_node->orig) ||
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nla_put(msg, BATADV_ATTR_NEIGH_ADDRESS, ETH_ALEN,
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neigh_node->addr) ||
|
|
nla_put_u32(msg, BATADV_ATTR_HARD_IFINDEX,
|
|
neigh_node->if_incoming->net_dev->ifindex) ||
|
|
nla_put_u32(msg, BATADV_ATTR_THROUGHPUT, throughput) ||
|
|
nla_put_u32(msg, BATADV_ATTR_LAST_SEEN_MSECS,
|
|
last_seen_msecs))
|
|
goto nla_put_failure;
|
|
|
|
if (best && nla_put_flag(msg, BATADV_ATTR_FLAG_BEST))
|
|
goto nla_put_failure;
|
|
|
|
genlmsg_end(msg, hdr);
|
|
return 0;
|
|
|
|
nla_put_failure:
|
|
genlmsg_cancel(msg, hdr);
|
|
return -EMSGSIZE;
|
|
}
|
|
|
|
/**
|
|
* batadv_v_orig_dump_entry - Dump an originator entry into a message
|
|
* @msg: Netlink message to dump into
|
|
* @portid: Port making netlink request
|
|
* @seq: Sequence number of netlink message
|
|
* @bat_priv: The bat priv with all the soft interface information
|
|
* @if_outgoing: Limit dump to entries with this outgoing interface
|
|
* @orig_node: Originator to dump
|
|
* @sub_s: Number of sub entries to skip
|
|
*
|
|
* This function assumes the caller holds rcu_read_lock().
|
|
*
|
|
* Return: Error code, or 0 on success
|
|
*/
|
|
static int
|
|
batadv_v_orig_dump_entry(struct sk_buff *msg, u32 portid, u32 seq,
|
|
struct batadv_priv *bat_priv,
|
|
struct batadv_hard_iface *if_outgoing,
|
|
struct batadv_orig_node *orig_node, int *sub_s)
|
|
{
|
|
struct batadv_neigh_node *neigh_node_best;
|
|
struct batadv_neigh_node *neigh_node;
|
|
int sub = 0;
|
|
bool best;
|
|
|
|
neigh_node_best = batadv_orig_router_get(orig_node, if_outgoing);
|
|
if (!neigh_node_best)
|
|
goto out;
|
|
|
|
hlist_for_each_entry_rcu(neigh_node, &orig_node->neigh_list, list) {
|
|
if (sub++ < *sub_s)
|
|
continue;
|
|
|
|
best = (neigh_node == neigh_node_best);
|
|
|
|
if (batadv_v_orig_dump_subentry(msg, portid, seq, bat_priv,
|
|
if_outgoing, orig_node,
|
|
neigh_node, best)) {
|
|
batadv_neigh_node_put(neigh_node_best);
|
|
|
|
*sub_s = sub - 1;
|
|
return -EMSGSIZE;
|
|
}
|
|
}
|
|
|
|
out:
|
|
if (neigh_node_best)
|
|
batadv_neigh_node_put(neigh_node_best);
|
|
|
|
*sub_s = 0;
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* batadv_v_orig_dump_bucket - Dump an originator bucket into a
|
|
* message
|
|
* @msg: Netlink message to dump into
|
|
* @portid: Port making netlink request
|
|
* @seq: Sequence number of netlink message
|
|
* @bat_priv: The bat priv with all the soft interface information
|
|
* @if_outgoing: Limit dump to entries with this outgoing interface
|
|
* @head: Bucket to be dumped
|
|
* @idx_s: Number of entries to be skipped
|
|
* @sub: Number of sub entries to be skipped
|
|
*
|
|
* Return: Error code, or 0 on success
|
|
*/
|
|
static int
|
|
batadv_v_orig_dump_bucket(struct sk_buff *msg, u32 portid, u32 seq,
|
|
struct batadv_priv *bat_priv,
|
|
struct batadv_hard_iface *if_outgoing,
|
|
struct hlist_head *head, int *idx_s, int *sub)
|
|
{
|
|
struct batadv_orig_node *orig_node;
|
|
int idx = 0;
|
|
|
|
rcu_read_lock();
|
|
hlist_for_each_entry_rcu(orig_node, head, hash_entry) {
|
|
if (idx++ < *idx_s)
|
|
continue;
|
|
|
|
if (batadv_v_orig_dump_entry(msg, portid, seq, bat_priv,
|
|
if_outgoing, orig_node, sub)) {
|
|
rcu_read_unlock();
|
|
*idx_s = idx - 1;
|
|
return -EMSGSIZE;
|
|
}
|
|
}
|
|
rcu_read_unlock();
|
|
|
|
*idx_s = 0;
|
|
*sub = 0;
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* batadv_v_orig_dump - Dump the originators into a message
|
|
* @msg: Netlink message to dump into
|
|
* @cb: Control block containing additional options
|
|
* @bat_priv: The bat priv with all the soft interface information
|
|
* @if_outgoing: Limit dump to entries with this outgoing interface
|
|
*/
|
|
static void
|
|
batadv_v_orig_dump(struct sk_buff *msg, struct netlink_callback *cb,
|
|
struct batadv_priv *bat_priv,
|
|
struct batadv_hard_iface *if_outgoing)
|
|
{
|
|
struct batadv_hashtable *hash = bat_priv->orig_hash;
|
|
struct hlist_head *head;
|
|
int bucket = cb->args[0];
|
|
int idx = cb->args[1];
|
|
int sub = cb->args[2];
|
|
int portid = NETLINK_CB(cb->skb).portid;
|
|
|
|
while (bucket < hash->size) {
|
|
head = &hash->table[bucket];
|
|
|
|
if (batadv_v_orig_dump_bucket(msg, portid,
|
|
cb->nlh->nlmsg_seq,
|
|
bat_priv, if_outgoing, head, &idx,
|
|
&sub))
|
|
break;
|
|
|
|
bucket++;
|
|
}
|
|
|
|
cb->args[0] = bucket;
|
|
cb->args[1] = idx;
|
|
cb->args[2] = sub;
|
|
}
|
|
|
|
static int batadv_v_neigh_cmp(struct batadv_neigh_node *neigh1,
|
|
struct batadv_hard_iface *if_outgoing1,
|
|
struct batadv_neigh_node *neigh2,
|
|
struct batadv_hard_iface *if_outgoing2)
|
|
{
|
|
struct batadv_neigh_ifinfo *ifinfo1, *ifinfo2;
|
|
int ret = 0;
|
|
|
|
ifinfo1 = batadv_neigh_ifinfo_get(neigh1, if_outgoing1);
|
|
if (WARN_ON(!ifinfo1))
|
|
goto err_ifinfo1;
|
|
|
|
ifinfo2 = batadv_neigh_ifinfo_get(neigh2, if_outgoing2);
|
|
if (WARN_ON(!ifinfo2))
|
|
goto err_ifinfo2;
|
|
|
|
ret = ifinfo1->bat_v.throughput - ifinfo2->bat_v.throughput;
|
|
|
|
batadv_neigh_ifinfo_put(ifinfo2);
|
|
err_ifinfo2:
|
|
batadv_neigh_ifinfo_put(ifinfo1);
|
|
err_ifinfo1:
|
|
return ret;
|
|
}
|
|
|
|
static bool batadv_v_neigh_is_sob(struct batadv_neigh_node *neigh1,
|
|
struct batadv_hard_iface *if_outgoing1,
|
|
struct batadv_neigh_node *neigh2,
|
|
struct batadv_hard_iface *if_outgoing2)
|
|
{
|
|
struct batadv_neigh_ifinfo *ifinfo1, *ifinfo2;
|
|
u32 threshold;
|
|
bool ret = false;
|
|
|
|
ifinfo1 = batadv_neigh_ifinfo_get(neigh1, if_outgoing1);
|
|
if (WARN_ON(!ifinfo1))
|
|
goto err_ifinfo1;
|
|
|
|
ifinfo2 = batadv_neigh_ifinfo_get(neigh2, if_outgoing2);
|
|
if (WARN_ON(!ifinfo2))
|
|
goto err_ifinfo2;
|
|
|
|
threshold = ifinfo1->bat_v.throughput / 4;
|
|
threshold = ifinfo1->bat_v.throughput - threshold;
|
|
|
|
ret = ifinfo2->bat_v.throughput > threshold;
|
|
|
|
batadv_neigh_ifinfo_put(ifinfo2);
|
|
err_ifinfo2:
|
|
batadv_neigh_ifinfo_put(ifinfo1);
|
|
err_ifinfo1:
|
|
return ret;
|
|
}
|
|
|
|
static ssize_t batadv_v_store_sel_class(struct batadv_priv *bat_priv,
|
|
char *buff, size_t count)
|
|
{
|
|
u32 old_class, class;
|
|
|
|
if (!batadv_parse_throughput(bat_priv->soft_iface, buff,
|
|
"B.A.T.M.A.N. V GW selection class",
|
|
&class))
|
|
return -EINVAL;
|
|
|
|
old_class = atomic_read(&bat_priv->gw.sel_class);
|
|
atomic_set(&bat_priv->gw.sel_class, class);
|
|
|
|
if (old_class != class)
|
|
batadv_gw_reselect(bat_priv);
|
|
|
|
return count;
|
|
}
|
|
|
|
static ssize_t batadv_v_show_sel_class(struct batadv_priv *bat_priv, char *buff)
|
|
{
|
|
u32 class = atomic_read(&bat_priv->gw.sel_class);
|
|
|
|
return sprintf(buff, "%u.%u MBit\n", class / 10, class % 10);
|
|
}
|
|
|
|
/**
|
|
* batadv_v_gw_throughput_get - retrieve the GW-bandwidth for a given GW
|
|
* @gw_node: the GW to retrieve the metric for
|
|
* @bw: the pointer where the metric will be stored. The metric is computed as
|
|
* the minimum between the GW advertised throughput and the path throughput to
|
|
* it in the mesh
|
|
*
|
|
* Return: 0 on success, -1 on failure
|
|
*/
|
|
static int batadv_v_gw_throughput_get(struct batadv_gw_node *gw_node, u32 *bw)
|
|
{
|
|
struct batadv_neigh_ifinfo *router_ifinfo = NULL;
|
|
struct batadv_orig_node *orig_node;
|
|
struct batadv_neigh_node *router;
|
|
int ret = -1;
|
|
|
|
orig_node = gw_node->orig_node;
|
|
router = batadv_orig_router_get(orig_node, BATADV_IF_DEFAULT);
|
|
if (!router)
|
|
goto out;
|
|
|
|
router_ifinfo = batadv_neigh_ifinfo_get(router, BATADV_IF_DEFAULT);
|
|
if (!router_ifinfo)
|
|
goto out;
|
|
|
|
/* the GW metric is computed as the minimum between the path throughput
|
|
* to reach the GW itself and the advertised bandwidth.
|
|
* This gives us an approximation of the effective throughput that the
|
|
* client can expect via this particular GW node
|
|
*/
|
|
*bw = router_ifinfo->bat_v.throughput;
|
|
*bw = min_t(u32, *bw, gw_node->bandwidth_down);
|
|
|
|
ret = 0;
|
|
out:
|
|
if (router)
|
|
batadv_neigh_node_put(router);
|
|
if (router_ifinfo)
|
|
batadv_neigh_ifinfo_put(router_ifinfo);
|
|
|
|
return ret;
|
|
}
|
|
|
|
/**
|
|
* batadv_v_gw_get_best_gw_node - retrieve the best GW node
|
|
* @bat_priv: the bat priv with all the soft interface information
|
|
*
|
|
* Return: the GW node having the best GW-metric, NULL if no GW is known
|
|
*/
|
|
static struct batadv_gw_node *
|
|
batadv_v_gw_get_best_gw_node(struct batadv_priv *bat_priv)
|
|
{
|
|
struct batadv_gw_node *gw_node, *curr_gw = NULL;
|
|
u32 max_bw = 0, bw;
|
|
|
|
rcu_read_lock();
|
|
hlist_for_each_entry_rcu(gw_node, &bat_priv->gw.gateway_list, list) {
|
|
if (!kref_get_unless_zero(&gw_node->refcount))
|
|
continue;
|
|
|
|
if (batadv_v_gw_throughput_get(gw_node, &bw) < 0)
|
|
goto next;
|
|
|
|
if (curr_gw && (bw <= max_bw))
|
|
goto next;
|
|
|
|
if (curr_gw)
|
|
batadv_gw_node_put(curr_gw);
|
|
|
|
curr_gw = gw_node;
|
|
kref_get(&curr_gw->refcount);
|
|
max_bw = bw;
|
|
|
|
next:
|
|
batadv_gw_node_put(gw_node);
|
|
}
|
|
rcu_read_unlock();
|
|
|
|
return curr_gw;
|
|
}
|
|
|
|
/**
|
|
* batadv_v_gw_is_eligible - check if a originator would be selected as GW
|
|
* @bat_priv: the bat priv with all the soft interface information
|
|
* @curr_gw_orig: originator representing the currently selected GW
|
|
* @orig_node: the originator representing the new candidate
|
|
*
|
|
* Return: true if orig_node can be selected as current GW, false otherwise
|
|
*/
|
|
static bool batadv_v_gw_is_eligible(struct batadv_priv *bat_priv,
|
|
struct batadv_orig_node *curr_gw_orig,
|
|
struct batadv_orig_node *orig_node)
|
|
{
|
|
struct batadv_gw_node *curr_gw, *orig_gw = NULL;
|
|
u32 gw_throughput, orig_throughput, threshold;
|
|
bool ret = false;
|
|
|
|
threshold = atomic_read(&bat_priv->gw.sel_class);
|
|
|
|
curr_gw = batadv_gw_node_get(bat_priv, curr_gw_orig);
|
|
if (!curr_gw) {
|
|
ret = true;
|
|
goto out;
|
|
}
|
|
|
|
if (batadv_v_gw_throughput_get(curr_gw, &gw_throughput) < 0) {
|
|
ret = true;
|
|
goto out;
|
|
}
|
|
|
|
orig_gw = batadv_gw_node_get(bat_priv, orig_node);
|
|
if (!orig_node)
|
|
goto out;
|
|
|
|
if (batadv_v_gw_throughput_get(orig_gw, &orig_throughput) < 0)
|
|
goto out;
|
|
|
|
if (orig_throughput < gw_throughput)
|
|
goto out;
|
|
|
|
if ((orig_throughput - gw_throughput) < threshold)
|
|
goto out;
|
|
|
|
batadv_dbg(BATADV_DBG_BATMAN, bat_priv,
|
|
"Restarting gateway selection: better gateway found (throughput curr: %u, throughput new: %u)\n",
|
|
gw_throughput, orig_throughput);
|
|
|
|
ret = true;
|
|
out:
|
|
if (curr_gw)
|
|
batadv_gw_node_put(curr_gw);
|
|
if (orig_gw)
|
|
batadv_gw_node_put(orig_gw);
|
|
|
|
return ret;
|
|
}
|
|
|
|
#ifdef CONFIG_BATMAN_ADV_DEBUGFS
|
|
/* fails if orig_node has no router */
|
|
static int batadv_v_gw_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 (%9u.%1u) %pM [%10s]: %u.%u/%u.%u MBit\n",
|
|
(curr_gw == gw_node ? "=>" : " "),
|
|
gw_node->orig_node->orig,
|
|
router_ifinfo->bat_v.throughput / 10,
|
|
router_ifinfo->bat_v.throughput % 10, 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;
|
|
}
|
|
|
|
/**
|
|
* batadv_v_gw_print - print the gateway list
|
|
* @bat_priv: the bat priv with all the soft interface information
|
|
* @seq: gateway table seq_file struct
|
|
*/
|
|
static void batadv_v_gw_print(struct batadv_priv *bat_priv,
|
|
struct seq_file *seq)
|
|
{
|
|
struct batadv_gw_node *gw_node;
|
|
int gw_count = 0;
|
|
|
|
seq_puts(seq,
|
|
" Gateway ( throughput) Nexthop [outgoingIF]: advertised uplink bandwidth\n");
|
|
|
|
rcu_read_lock();
|
|
hlist_for_each_entry_rcu(gw_node, &bat_priv->gw.gateway_list, list) {
|
|
/* fails if orig_node has no router */
|
|
if (batadv_v_gw_write_buffer_text(bat_priv, seq, gw_node) < 0)
|
|
continue;
|
|
|
|
gw_count++;
|
|
}
|
|
rcu_read_unlock();
|
|
|
|
if (gw_count == 0)
|
|
seq_puts(seq, "No gateways in range ...\n");
|
|
}
|
|
#endif
|
|
|
|
/**
|
|
* batadv_v_gw_dump_entry - Dump a gateway into a message
|
|
* @msg: Netlink message to dump into
|
|
* @portid: Port making netlink request
|
|
* @seq: Sequence number of netlink message
|
|
* @bat_priv: The bat priv with all the soft interface information
|
|
* @gw_node: Gateway to be dumped
|
|
*
|
|
* Return: Error code, or 0 on success
|
|
*/
|
|
static int batadv_v_gw_dump_entry(struct sk_buff *msg, u32 portid, u32 seq,
|
|
struct batadv_priv *bat_priv,
|
|
struct batadv_gw_node *gw_node)
|
|
{
|
|
struct batadv_neigh_ifinfo *router_ifinfo = NULL;
|
|
struct batadv_neigh_node *router;
|
|
struct batadv_gw_node *curr_gw;
|
|
int ret = -EINVAL;
|
|
void *hdr;
|
|
|
|
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);
|
|
|
|
hdr = genlmsg_put(msg, portid, seq, &batadv_netlink_family,
|
|
NLM_F_MULTI, BATADV_CMD_GET_GATEWAYS);
|
|
if (!hdr) {
|
|
ret = -ENOBUFS;
|
|
goto out;
|
|
}
|
|
|
|
ret = -EMSGSIZE;
|
|
|
|
if (curr_gw == gw_node) {
|
|
if (nla_put_flag(msg, BATADV_ATTR_FLAG_BEST)) {
|
|
genlmsg_cancel(msg, hdr);
|
|
goto out;
|
|
}
|
|
}
|
|
|
|
if (nla_put(msg, BATADV_ATTR_ORIG_ADDRESS, ETH_ALEN,
|
|
gw_node->orig_node->orig)) {
|
|
genlmsg_cancel(msg, hdr);
|
|
goto out;
|
|
}
|
|
|
|
if (nla_put_u32(msg, BATADV_ATTR_THROUGHPUT,
|
|
router_ifinfo->bat_v.throughput)) {
|
|
genlmsg_cancel(msg, hdr);
|
|
goto out;
|
|
}
|
|
|
|
if (nla_put(msg, BATADV_ATTR_ROUTER, ETH_ALEN, router->addr)) {
|
|
genlmsg_cancel(msg, hdr);
|
|
goto out;
|
|
}
|
|
|
|
if (nla_put_string(msg, BATADV_ATTR_HARD_IFNAME,
|
|
router->if_incoming->net_dev->name)) {
|
|
genlmsg_cancel(msg, hdr);
|
|
goto out;
|
|
}
|
|
|
|
if (nla_put_u32(msg, BATADV_ATTR_BANDWIDTH_DOWN,
|
|
gw_node->bandwidth_down)) {
|
|
genlmsg_cancel(msg, hdr);
|
|
goto out;
|
|
}
|
|
|
|
if (nla_put_u32(msg, BATADV_ATTR_BANDWIDTH_UP, gw_node->bandwidth_up)) {
|
|
genlmsg_cancel(msg, hdr);
|
|
goto out;
|
|
}
|
|
|
|
genlmsg_end(msg, hdr);
|
|
ret = 0;
|
|
|
|
out:
|
|
if (router_ifinfo)
|
|
batadv_neigh_ifinfo_put(router_ifinfo);
|
|
if (router)
|
|
batadv_neigh_node_put(router);
|
|
return ret;
|
|
}
|
|
|
|
/**
|
|
* batadv_v_gw_dump - Dump gateways into a message
|
|
* @msg: Netlink message to dump into
|
|
* @cb: Control block containing additional options
|
|
* @bat_priv: The bat priv with all the soft interface information
|
|
*/
|
|
static void batadv_v_gw_dump(struct sk_buff *msg, struct netlink_callback *cb,
|
|
struct batadv_priv *bat_priv)
|
|
{
|
|
int portid = NETLINK_CB(cb->skb).portid;
|
|
struct batadv_gw_node *gw_node;
|
|
int idx_skip = cb->args[0];
|
|
int idx = 0;
|
|
|
|
rcu_read_lock();
|
|
hlist_for_each_entry_rcu(gw_node, &bat_priv->gw.gateway_list, list) {
|
|
if (idx++ < idx_skip)
|
|
continue;
|
|
|
|
if (batadv_v_gw_dump_entry(msg, portid, cb->nlh->nlmsg_seq,
|
|
bat_priv, gw_node)) {
|
|
idx_skip = idx - 1;
|
|
goto unlock;
|
|
}
|
|
}
|
|
|
|
idx_skip = idx;
|
|
unlock:
|
|
rcu_read_unlock();
|
|
|
|
cb->args[0] = idx_skip;
|
|
}
|
|
|
|
static struct batadv_algo_ops batadv_batman_v __read_mostly = {
|
|
.name = "BATMAN_V",
|
|
.iface = {
|
|
.activate = batadv_v_iface_activate,
|
|
.enable = batadv_v_iface_enable,
|
|
.disable = batadv_v_iface_disable,
|
|
.update_mac = batadv_v_iface_update_mac,
|
|
.primary_set = batadv_v_primary_iface_set,
|
|
},
|
|
.neigh = {
|
|
.hardif_init = batadv_v_hardif_neigh_init,
|
|
.cmp = batadv_v_neigh_cmp,
|
|
.is_similar_or_better = batadv_v_neigh_is_sob,
|
|
#ifdef CONFIG_BATMAN_ADV_DEBUGFS
|
|
.print = batadv_v_neigh_print,
|
|
#endif
|
|
.dump = batadv_v_neigh_dump,
|
|
},
|
|
.orig = {
|
|
#ifdef CONFIG_BATMAN_ADV_DEBUGFS
|
|
.print = batadv_v_orig_print,
|
|
#endif
|
|
.dump = batadv_v_orig_dump,
|
|
},
|
|
.gw = {
|
|
.store_sel_class = batadv_v_store_sel_class,
|
|
.show_sel_class = batadv_v_show_sel_class,
|
|
.get_best_gw_node = batadv_v_gw_get_best_gw_node,
|
|
.is_eligible = batadv_v_gw_is_eligible,
|
|
#ifdef CONFIG_BATMAN_ADV_DEBUGFS
|
|
.print = batadv_v_gw_print,
|
|
#endif
|
|
.dump = batadv_v_gw_dump,
|
|
},
|
|
};
|
|
|
|
/**
|
|
* batadv_v_hardif_init - initialize the algorithm specific fields in the
|
|
* hard-interface object
|
|
* @hard_iface: the hard-interface to initialize
|
|
*/
|
|
void batadv_v_hardif_init(struct batadv_hard_iface *hard_iface)
|
|
{
|
|
/* enable link throughput auto-detection by setting the throughput
|
|
* override to zero
|
|
*/
|
|
atomic_set(&hard_iface->bat_v.throughput_override, 0);
|
|
atomic_set(&hard_iface->bat_v.elp_interval, 500);
|
|
}
|
|
|
|
/**
|
|
* batadv_v_mesh_init - initialize the B.A.T.M.A.N. V private resources for a
|
|
* mesh
|
|
* @bat_priv: the object representing the mesh interface to initialise
|
|
*
|
|
* Return: 0 on success or a negative error code otherwise
|
|
*/
|
|
int batadv_v_mesh_init(struct batadv_priv *bat_priv)
|
|
{
|
|
int ret = 0;
|
|
|
|
ret = batadv_v_ogm_init(bat_priv);
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
/* set default throughput difference threshold to 5Mbps */
|
|
atomic_set(&bat_priv->gw.sel_class, 50);
|
|
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* batadv_v_mesh_free - free the B.A.T.M.A.N. V private resources for a mesh
|
|
* @bat_priv: the object representing the mesh interface to free
|
|
*/
|
|
void batadv_v_mesh_free(struct batadv_priv *bat_priv)
|
|
{
|
|
batadv_v_ogm_free(bat_priv);
|
|
}
|
|
|
|
/**
|
|
* batadv_v_init - B.A.T.M.A.N. V initialization function
|
|
*
|
|
* Description: Takes care of initializing all the subcomponents.
|
|
* It is invoked upon module load only.
|
|
*
|
|
* Return: 0 on success or a negative error code otherwise
|
|
*/
|
|
int __init batadv_v_init(void)
|
|
{
|
|
int ret;
|
|
|
|
/* B.A.T.M.A.N. V echo location protocol packet */
|
|
ret = batadv_recv_handler_register(BATADV_ELP,
|
|
batadv_v_elp_packet_recv);
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
ret = batadv_recv_handler_register(BATADV_OGM2,
|
|
batadv_v_ogm_packet_recv);
|
|
if (ret < 0)
|
|
goto elp_unregister;
|
|
|
|
ret = batadv_algo_register(&batadv_batman_v);
|
|
if (ret < 0)
|
|
goto ogm_unregister;
|
|
|
|
return ret;
|
|
|
|
ogm_unregister:
|
|
batadv_recv_handler_unregister(BATADV_OGM2);
|
|
|
|
elp_unregister:
|
|
batadv_recv_handler_unregister(BATADV_ELP);
|
|
|
|
return ret;
|
|
}
|