forked from Minki/linux
1653f61d65
When the MAC address of the primary interface is changed,
update the originator address in the ELP and OGM skb buffers as
well in order to reflect the change.
Fixes: d6f94d91f7 ("batman-adv: ELP - adding basic infrastructure")
Reported-by: Marek Lindner <marek@neomailbox.ch>
Signed-off-by: Antonio Quartulli <a@unstable.cc>
399 lines
11 KiB
C
399 lines
11 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_algo.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/init.h>
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#include <linux/jiffies.h>
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#include <linux/netdevice.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 "bat_v_elp.h"
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#include "bat_v_ogm.h"
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#include "hard-interface.h"
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#include "hash.h"
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#include "originator.h"
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#include "packet.h"
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static void batadv_v_iface_activate(struct batadv_hard_iface *hard_iface)
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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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/* enable link throughput auto-detection by setting the throughput
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* override to zero
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*/
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atomic_set(&hard_iface->bat_v.throughput_override, 0);
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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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static void batadv_v_ogm_schedule(struct batadv_hard_iface *hard_iface)
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{
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}
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static void batadv_v_ogm_emit(struct batadv_forw_packet *forw_packet)
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{
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}
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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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/**
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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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static int batadv_v_neigh_cmp(struct batadv_neigh_node *neigh1,
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struct batadv_hard_iface *if_outgoing1,
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struct batadv_neigh_node *neigh2,
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struct batadv_hard_iface *if_outgoing2)
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{
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struct batadv_neigh_ifinfo *ifinfo1, *ifinfo2;
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int ret = 0;
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ifinfo1 = batadv_neigh_ifinfo_get(neigh1, if_outgoing1);
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if (WARN_ON(!ifinfo1))
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goto err_ifinfo1;
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ifinfo2 = batadv_neigh_ifinfo_get(neigh2, if_outgoing2);
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if (WARN_ON(!ifinfo2))
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goto err_ifinfo2;
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ret = ifinfo1->bat_v.throughput - ifinfo2->bat_v.throughput;
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batadv_neigh_ifinfo_put(ifinfo2);
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err_ifinfo2:
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batadv_neigh_ifinfo_put(ifinfo1);
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err_ifinfo1:
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return ret;
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}
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static bool batadv_v_neigh_is_sob(struct batadv_neigh_node *neigh1,
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struct batadv_hard_iface *if_outgoing1,
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struct batadv_neigh_node *neigh2,
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struct batadv_hard_iface *if_outgoing2)
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{
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struct batadv_neigh_ifinfo *ifinfo1, *ifinfo2;
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u32 threshold;
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bool ret = false;
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ifinfo1 = batadv_neigh_ifinfo_get(neigh1, if_outgoing1);
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if (WARN_ON(!ifinfo1))
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goto err_ifinfo1;
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ifinfo2 = batadv_neigh_ifinfo_get(neigh2, if_outgoing2);
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if (WARN_ON(!ifinfo2))
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goto err_ifinfo2;
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threshold = ifinfo1->bat_v.throughput / 4;
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threshold = ifinfo1->bat_v.throughput - threshold;
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ret = ifinfo2->bat_v.throughput > threshold;
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batadv_neigh_ifinfo_put(ifinfo2);
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err_ifinfo2:
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batadv_neigh_ifinfo_put(ifinfo1);
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err_ifinfo1:
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return ret;
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}
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static struct batadv_algo_ops batadv_batman_v __read_mostly = {
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.name = "BATMAN_V",
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.bat_iface_activate = batadv_v_iface_activate,
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.bat_iface_enable = batadv_v_iface_enable,
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.bat_iface_disable = batadv_v_iface_disable,
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.bat_iface_update_mac = batadv_v_iface_update_mac,
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.bat_primary_iface_set = batadv_v_primary_iface_set,
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.bat_hardif_neigh_init = batadv_v_hardif_neigh_init,
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.bat_ogm_emit = batadv_v_ogm_emit,
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.bat_ogm_schedule = batadv_v_ogm_schedule,
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.bat_orig_print = batadv_v_orig_print,
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.bat_neigh_cmp = batadv_v_neigh_cmp,
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.bat_neigh_is_similar_or_better = batadv_v_neigh_is_sob,
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.bat_neigh_print = batadv_v_neigh_print,
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};
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/**
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* batadv_v_mesh_init - initialize the B.A.T.M.A.N. V private resources for a
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* mesh
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* @bat_priv: the object representing the mesh interface to initialise
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*
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* Return: 0 on success or a negative error code otherwise
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*/
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int batadv_v_mesh_init(struct batadv_priv *bat_priv)
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{
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return batadv_v_ogm_init(bat_priv);
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}
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/**
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* batadv_v_mesh_free - free the B.A.T.M.A.N. V private resources for a mesh
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* @bat_priv: the object representing the mesh interface to free
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*/
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void batadv_v_mesh_free(struct batadv_priv *bat_priv)
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{
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batadv_v_ogm_free(bat_priv);
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}
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/**
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* batadv_v_init - B.A.T.M.A.N. V initialization function
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*
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* Description: Takes care of initializing all the subcomponents.
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* It is invoked upon module load only.
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*
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* Return: 0 on success or a negative error code otherwise
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*/
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int __init batadv_v_init(void)
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{
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int ret;
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/* B.A.T.M.A.N. V echo location protocol packet */
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ret = batadv_recv_handler_register(BATADV_ELP,
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batadv_v_elp_packet_recv);
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if (ret < 0)
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return ret;
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ret = batadv_recv_handler_register(BATADV_OGM2,
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batadv_v_ogm_packet_recv);
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if (ret < 0)
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goto elp_unregister;
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ret = batadv_algo_register(&batadv_batman_v);
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if (ret < 0)
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goto ogm_unregister;
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return ret;
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ogm_unregister:
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batadv_recv_handler_unregister(BATADV_OGM2);
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elp_unregister:
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batadv_recv_handler_unregister(BATADV_ELP);
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return ret;
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}
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