[linux-2.6-block.git] / net / batman-adv / bat_v.c

/* Copyright (C) 2013-2016 B.A.T.M.A.N. contributors:
 *
 * Linus Lüssing, Marek Lindner
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of version 2 of the GNU General Public
 * License as published by the Free Software Foundation.
 *
 * This program is distributed in the hope that it will be useful, but
 * WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
 * General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, see <http://www.gnu.org/licenses/>.
 */

#include "bat_algo.h"
#include "main.h"

#include <linux/atomic.h>
#include <linux/bug.h>
#include <linux/cache.h>
#include <linux/init.h>
#include <linux/jiffies.h>
#include <linux/netdevice.h>
#include <linux/rculist.h>
#include <linux/rcupdate.h>
#include <linux/seq_file.h>
#include <linux/stddef.h>
#include <linux/types.h>
#include <linux/workqueue.h>

#include "bat_v_elp.h"
#include "bat_v_ogm.h"
#include "hard-interface.h"
#include "hash.h"
#include "originator.h"
#include "packet.h"

static void batadv_v_iface_activate(struct batadv_hard_iface *hard_iface)
{
	struct batadv_priv *bat_priv = netdev_priv(hard_iface->soft_iface);
	struct batadv_hard_iface *primary_if;

	primary_if = batadv_primary_if_get_selected(bat_priv);

	if (primary_if) {
		batadv_v_elp_iface_activate(primary_if, hard_iface);
		batadv_hardif_put(primary_if);
	}

	/* B.A.T.M.A.N. V does not use any queuing mechanism, therefore it can
	 * set the interface as ACTIVE right away, without any risk of race
	 * condition
	 */
	if (hard_iface->if_status == BATADV_IF_TO_BE_ACTIVATED)
		hard_iface->if_status = BATADV_IF_ACTIVE;
}

static int batadv_v_iface_enable(struct batadv_hard_iface *hard_iface)
{
	int ret;

	ret = batadv_v_elp_iface_enable(hard_iface);
	if (ret < 0)
		return ret;

	ret = batadv_v_ogm_iface_enable(hard_iface);
	if (ret < 0)
		batadv_v_elp_iface_disable(hard_iface);

	/* enable link throughput auto-detection by setting the throughput
	 * override to zero
	 */
	atomic_set(&hard_iface->bat_v.throughput_override, 0);

	return ret;
}

static void batadv_v_iface_disable(struct batadv_hard_iface *hard_iface)
{
	batadv_v_elp_iface_disable(hard_iface);
}

static void batadv_v_primary_iface_set(struct batadv_hard_iface *hard_iface)
{
	batadv_v_elp_primary_iface_set(hard_iface);
	batadv_v_ogm_primary_iface_set(hard_iface);
}

/**
 * batadv_v_iface_update_mac - react to hard-interface MAC address change
 * @hard_iface: the modified interface
 *
 * If the modified interface is the primary one, update the originator
 * address in the ELP and OGM messages to reflect the new MAC address.
 */
static void batadv_v_iface_update_mac(struct batadv_hard_iface *hard_iface)
{
	struct batadv_priv *bat_priv = netdev_priv(hard_iface->soft_iface);
	struct batadv_hard_iface *primary_if;

	primary_if = batadv_primary_if_get_selected(bat_priv);
	if (primary_if != hard_iface)
		goto out;

	batadv_v_primary_iface_set(hard_iface);
out:
	if (primary_if)
		batadv_hardif_put(primary_if);
}

static void
batadv_v_hardif_neigh_init(struct batadv_hardif_neigh_node *hardif_neigh)
{
	ewma_throughput_init(&hardif_neigh->bat_v.throughput);
	INIT_WORK(&hardif_neigh->bat_v.metric_work,
		  batadv_v_elp_throughput_metric_update);
}

static void batadv_v_ogm_schedule(struct batadv_hard_iface *hard_iface)
{
}

static void batadv_v_ogm_emit(struct batadv_forw_packet *forw_packet)
{
}

/**
 * batadv_v_orig_print_neigh - print neighbors for the originator table
 * @orig_node: the orig_node for which the neighbors are printed
 * @if_outgoing: outgoing interface for these entries
 * @seq: debugfs table seq_file struct
 *
 * Must be called while holding an rcu lock.
 */
static void
batadv_v_orig_print_neigh(struct batadv_orig_node *orig_node,
			  struct batadv_hard_iface *if_outgoing,
			  struct seq_file *seq)
{
	struct batadv_neigh_node *neigh_node;
	struct batadv_neigh_ifinfo *n_ifinfo;

	hlist_for_each_entry_rcu(neigh_node, &orig_node->neigh_list, list) {
		n_ifinfo = batadv_neigh_ifinfo_get(neigh_node, if_outgoing);
		if (!n_ifinfo)
			continue;

		seq_printf(seq, " %pM (%9u.%1u)",
			   neigh_node->addr,
			   n_ifinfo->bat_v.throughput / 10,
			   n_ifinfo->bat_v.throughput % 10);

		batadv_neigh_ifinfo_put(n_ifinfo);
	}
}

/**
 * batadv_v_hardif_neigh_print - print a single ELP neighbour node
 * @seq: neighbour table seq_file struct
 * @hardif_neigh: hardif neighbour information
 */
static void
batadv_v_hardif_neigh_print(struct seq_file *seq,
			    struct batadv_hardif_neigh_node *hardif_neigh)
{
	int last_secs, last_msecs;
	u32 throughput;

	last_secs = jiffies_to_msecs(jiffies - hardif_neigh->last_seen) / 1000;
	last_msecs = jiffies_to_msecs(jiffies - hardif_neigh->last_seen) % 1000;
	throughput = ewma_throughput_read(&hardif_neigh->bat_v.throughput);

	seq_printf(seq, "%pM %4i.%03is (%9u.%1u) [%10s]\n",
		   hardif_neigh->addr, last_secs, last_msecs, throughput / 10,
		   throughput % 10, hardif_neigh->if_incoming->net_dev->name);
}

/**
 * batadv_v_neigh_print - print the single hop neighbour list
 * @bat_priv: the bat priv with all the soft interface information
 * @seq: neighbour table seq_file struct
 */
static void batadv_v_neigh_print(struct batadv_priv *bat_priv,
				 struct seq_file *seq)
{
	struct net_device *net_dev = (struct net_device *)seq->private;
	struct batadv_hardif_neigh_node *hardif_neigh;
	struct batadv_hard_iface *hard_iface;
	int batman_count = 0;

	seq_puts(seq,
		 "  Neighbor        last-seen ( throughput) [        IF]\n");

	rcu_read_lock();
	list_for_each_entry_rcu(hard_iface, &batadv_hardif_list, list) {
		if (hard_iface->soft_iface != net_dev)
			continue;

		hlist_for_each_entry_rcu(hardif_neigh,
					 &hard_iface->neigh_list, list) {
			batadv_v_hardif_neigh_print(seq, hardif_neigh);
			batman_count++;
		}
	}
	rcu_read_unlock();

	if (batman_count == 0)
		seq_puts(seq, "No batman nodes in range ...\n");
}

/**
 * batadv_v_orig_print - print the originator table
 * @bat_priv: the bat priv with all the soft interface information
 * @seq: debugfs table seq_file struct
 * @if_outgoing: the outgoing interface for which this should be printed
 */
static void batadv_v_orig_print(struct batadv_priv *bat_priv,
				struct seq_file *seq,
				struct batadv_hard_iface *if_outgoing)
{
	struct batadv_neigh_node *neigh_node;
	struct batadv_hashtable *hash = bat_priv->orig_hash;
	int last_seen_msecs, last_seen_secs;
	struct batadv_orig_node *orig_node;
	struct batadv_neigh_ifinfo *n_ifinfo;
	unsigned long last_seen_jiffies;
	struct hlist_head *head;
	int batman_count = 0;
	u32 i;

	seq_puts(seq,
		 "  Originator      last-seen ( throughput)           Nexthop [outgoingIF]:   Potential nexthops ...\n");

	for (i = 0; i < hash->size; i++) {
		head = &hash->table[i];

		rcu_read_lock();
		hlist_for_each_entry_rcu(orig_node, head, hash_entry) {
			neigh_node = batadv_orig_router_get(orig_node,
							    if_outgoing);
			if (!neigh_node)
				continue;

			n_ifinfo = batadv_neigh_ifinfo_get(neigh_node,
							   if_outgoing);
			if (!n_ifinfo)
				goto next;

			last_seen_jiffies = jiffies - orig_node->last_seen;
			last_seen_msecs = jiffies_to_msecs(last_seen_jiffies);
			last_seen_secs = last_seen_msecs / 1000;
			last_seen_msecs = last_seen_msecs % 1000;

			seq_printf(seq, "%pM %4i.%03is (%9u.%1u) %pM [%10s]:",
				   orig_node->orig, last_seen_secs,
				   last_seen_msecs,
				   n_ifinfo->bat_v.throughput / 10,
				   n_ifinfo->bat_v.throughput % 10,
				   neigh_node->addr,
				   neigh_node->if_incoming->net_dev->name);

			batadv_v_orig_print_neigh(orig_node, if_outgoing, seq);
			seq_puts(seq, "\n");
			batman_count++;

next:
			batadv_neigh_node_put(neigh_node);
			if (n_ifinfo)
				batadv_neigh_ifinfo_put(n_ifinfo);
		}
		rcu_read_unlock();
	}

	if (batman_count == 0)
		seq_puts(seq, "No batman nodes in range ...\n");
}

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 struct batadv_algo_ops batadv_batman_v __read_mostly = {
	.name = "BATMAN_V",
	.bat_iface_activate = batadv_v_iface_activate,
	.bat_iface_enable = batadv_v_iface_enable,
	.bat_iface_disable = batadv_v_iface_disable,
	.bat_iface_update_mac = batadv_v_iface_update_mac,
	.bat_primary_iface_set = batadv_v_primary_iface_set,
	.bat_hardif_neigh_init = batadv_v_hardif_neigh_init,
	.bat_ogm_emit = batadv_v_ogm_emit,
	.bat_ogm_schedule = batadv_v_ogm_schedule,
	.bat_orig_print = batadv_v_orig_print,
	.bat_neigh_cmp = batadv_v_neigh_cmp,
	.bat_neigh_is_similar_or_better = batadv_v_neigh_is_sob,
	.bat_neigh_print = batadv_v_neigh_print,
};

/**
 * 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)
{
	return batadv_v_ogm_init(bat_priv);
}

/**
 * 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;
}
Commit	Line	Data
d6f94d91 LL	1	/* Copyright (C) 2013-2016 B.A.T.M.A.N. contributors:
	2	*
	3	* Linus Lüssing, Marek Lindner
	4	*
	5	* This program is free software; you can redistribute it and/or
	6	* modify it under the terms of version 2 of the GNU General Public
	7	* License as published by the Free Software Foundation.
	8	*
	9	* This program is distributed in the hope that it will be useful, but
	10	* WITHOUT ANY WARRANTY; without even the implied warranty of
	11	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
	12	* General Public License for more details.
	13	*
	14	* You should have received a copy of the GNU General Public License
	15	* along with this program; if not, see <http://www.gnu.org/licenses/>.
	16	*/
	17
	18	#include "bat_algo.h"
	19	#include "main.h"
	20
0b5ecc68	21	#include <linux/atomic.h>
97869060	22	#include <linux/bug.h>
d6f94d91 LL	23	#include <linux/cache.h>
d6f94d91 LL	24	#include <linux/init.h>
261e264d AQ	25	#include <linux/jiffies.h>
	26	#include <linux/netdevice.h>
	27	#include <linux/rculist.h>
	28	#include <linux/rcupdate.h>
	29	#include <linux/seq_file.h>
a45e932a	30	#include <linux/stddef.h>
97869060	31	#include <linux/types.h>
c833484e	32	#include <linux/workqueue.h>
d6f94d91 LL	33
d6f94d91 LL	34	#include "bat_v_elp.h"
0da00359	35	#include "bat_v_ogm.h"
b6cf5d49	36	#include "hard-interface.h"
261e264d	37	#include "hash.h"
97869060	38	#include "originator.h"
162bd64c	39	#include "packet.h"
d6f94d91	40
b6cf5d49 AQ	41	static void batadv_v_iface_activate(struct batadv_hard_iface *hard_iface)
b6cf5d49 AQ	42	{
ebe24cea ML	43	struct batadv_priv *bat_priv = netdev_priv(hard_iface->soft_iface);
	44	struct batadv_hard_iface *primary_if;
	45
	46	primary_if = batadv_primary_if_get_selected(bat_priv);
	47
	48	if (primary_if) {
	49	batadv_v_elp_iface_activate(primary_if, hard_iface);
	50	batadv_hardif_put(primary_if);
	51	}
	52
b6cf5d49 AQ	53	/* B.A.T.M.A.N. V does not use any queuing mechanism, therefore it can
	54	* set the interface as ACTIVE right away, without any risk of race
	55	* condition
	56	*/
	57	if (hard_iface->if_status == BATADV_IF_TO_BE_ACTIVATED)
	58	hard_iface->if_status = BATADV_IF_ACTIVE;
	59	}
	60
d6f94d91 LL	61	static int batadv_v_iface_enable(struct batadv_hard_iface *hard_iface)
d6f94d91 LL	62	{
0da00359 AQ	63	int ret;
	64
	65	ret = batadv_v_elp_iface_enable(hard_iface);
	66	if (ret < 0)
	67	return ret;
	68
	69	ret = batadv_v_ogm_iface_enable(hard_iface);
	70	if (ret < 0)
	71	batadv_v_elp_iface_disable(hard_iface);
	72
0b5ecc68 AQ	73	/* enable link throughput auto-detection by setting the throughput
	74	* override to zero
	75	*/
	76	atomic_set(&hard_iface->bat_v.throughput_override, 0);
	77
0da00359	78	return ret;
d6f94d91 LL	79	}
	80
	81	static void batadv_v_iface_disable(struct batadv_hard_iface *hard_iface)
	82	{
	83	batadv_v_elp_iface_disable(hard_iface);
	84	}
	85
d6f94d91 LL	86	static void batadv_v_primary_iface_set(struct batadv_hard_iface *hard_iface)
	87	{
	88	batadv_v_elp_primary_iface_set(hard_iface);
0da00359	89	batadv_v_ogm_primary_iface_set(hard_iface);
d6f94d91 LL	90	}
d6f94d91 LL	91
1653f61d AQ	92	/**
	93	* batadv_v_iface_update_mac - react to hard-interface MAC address change
	94	* @hard_iface: the modified interface
	95	*
	96	* If the modified interface is the primary one, update the originator
	97	* address in the ELP and OGM messages to reflect the new MAC address.
	98	*/
	99	static void batadv_v_iface_update_mac(struct batadv_hard_iface *hard_iface)
	100	{
	101	struct batadv_priv *bat_priv = netdev_priv(hard_iface->soft_iface);
	102	struct batadv_hard_iface *primary_if;
	103
	104	primary_if = batadv_primary_if_get_selected(bat_priv);
	105	if (primary_if != hard_iface)
	106	goto out;
	107
	108	batadv_v_primary_iface_set(hard_iface);
	109	out:
	110	if (primary_if)
	111	batadv_hardif_put(primary_if);
	112	}
	113
162bd64c LL	114	static void
	115	batadv_v_hardif_neigh_init(struct batadv_hardif_neigh_node *hardif_neigh)
	116	{
	117	ewma_throughput_init(&hardif_neigh->bat_v.throughput);
c833484e AQ	118	INIT_WORK(&hardif_neigh->bat_v.metric_work,
c833484e AQ	119	batadv_v_elp_throughput_metric_update);
162bd64c LL	120	}
162bd64c LL	121
d6f94d91 LL	122	static void batadv_v_ogm_schedule(struct batadv_hard_iface *hard_iface)
	123	{
	124	}
	125
	126	static void batadv_v_ogm_emit(struct batadv_forw_packet *forw_packet)
	127	{
	128	}
	129
261e264d AQ	130	/**
	131	* batadv_v_orig_print_neigh - print neighbors for the originator table
	132	* @orig_node: the orig_node for which the neighbors are printed
	133	* @if_outgoing: outgoing interface for these entries
	134	* @seq: debugfs table seq_file struct
	135	*
	136	* Must be called while holding an rcu lock.
	137	*/
	138	static void
	139	batadv_v_orig_print_neigh(struct batadv_orig_node *orig_node,
	140	struct batadv_hard_iface *if_outgoing,
	141	struct seq_file *seq)
	142	{
	143	struct batadv_neigh_node *neigh_node;
	144	struct batadv_neigh_ifinfo *n_ifinfo;
	145
	146	hlist_for_each_entry_rcu(neigh_node, &orig_node->neigh_list, list) {
	147	n_ifinfo = batadv_neigh_ifinfo_get(neigh_node, if_outgoing);
	148	if (!n_ifinfo)
	149	continue;
	150
	151	seq_printf(seq, " %pM (%9u.%1u)",
	152	neigh_node->addr,
	153	n_ifinfo->bat_v.throughput / 10,
	154	n_ifinfo->bat_v.throughput % 10);
	155
	156	batadv_neigh_ifinfo_put(n_ifinfo);
	157	}
	158	}
	159
626d23e8 LL	160	/**
	161	* batadv_v_hardif_neigh_print - print a single ELP neighbour node
	162	* @seq: neighbour table seq_file struct
	163	* @hardif_neigh: hardif neighbour information
	164	*/
	165	static void
	166	batadv_v_hardif_neigh_print(struct seq_file *seq,
	167	struct batadv_hardif_neigh_node *hardif_neigh)
	168	{
	169	int last_secs, last_msecs;
	170	u32 throughput;
	171
	172	last_secs = jiffies_to_msecs(jiffies - hardif_neigh->last_seen) / 1000;
	173	last_msecs = jiffies_to_msecs(jiffies - hardif_neigh->last_seen) % 1000;
	174	throughput = ewma_throughput_read(&hardif_neigh->bat_v.throughput);
	175
	176	seq_printf(seq, "%pM %4i.%03is (%9u.%1u) [%10s]\n",
	177	hardif_neigh->addr, last_secs, last_msecs, throughput / 10,
	178	throughput % 10, hardif_neigh->if_incoming->net_dev->name);
	179	}
	180
	181	/**
	182	* batadv_v_neigh_print - print the single hop neighbour list
	183	* @bat_priv: the bat priv with all the soft interface information
	184	* @seq: neighbour table seq_file struct
	185	*/
	186	static void batadv_v_neigh_print(struct batadv_priv *bat_priv,
	187	struct seq_file *seq)
	188	{
	189	struct net_device net_dev = (struct net_device )seq->private;
	190	struct batadv_hardif_neigh_node *hardif_neigh;
	191	struct batadv_hard_iface *hard_iface;
	192	int batman_count = 0;
	193
925a6f37 AQ	194	seq_puts(seq,
925a6f37 AQ	195	" Neighbor last-seen ( throughput) [ IF]\n");
626d23e8 LL	196
	197	rcu_read_lock();
	198	list_for_each_entry_rcu(hard_iface, &batadv_hardif_list, list) {
	199	if (hard_iface->soft_iface != net_dev)
	200	continue;
	201
	202	hlist_for_each_entry_rcu(hardif_neigh,
	203	&hard_iface->neigh_list, list) {
	204	batadv_v_hardif_neigh_print(seq, hardif_neigh);
	205	batman_count++;
	206	}
	207	}
	208	rcu_read_unlock();
	209
	210	if (batman_count == 0)
	211	seq_puts(seq, "No batman nodes in range ...\n");
	212	}
	213
261e264d AQ	214	/**
	215	* batadv_v_orig_print - print the originator table
	216	* @bat_priv: the bat priv with all the soft interface information
	217	* @seq: debugfs table seq_file struct
	218	* @if_outgoing: the outgoing interface for which this should be printed
	219	*/
	220	static void batadv_v_orig_print(struct batadv_priv *bat_priv,
	221	struct seq_file *seq,
	222	struct batadv_hard_iface *if_outgoing)
	223	{
	224	struct batadv_neigh_node *neigh_node;
	225	struct batadv_hashtable *hash = bat_priv->orig_hash;
	226	int last_seen_msecs, last_seen_secs;
	227	struct batadv_orig_node *orig_node;
	228	struct batadv_neigh_ifinfo *n_ifinfo;
	229	unsigned long last_seen_jiffies;
	230	struct hlist_head *head;
	231	int batman_count = 0;
	232	u32 i;
	233
925a6f37 AQ	234	seq_puts(seq,
925a6f37 AQ	235	" Originator last-seen ( throughput) Nexthop [outgoingIF]: Potential nexthops ...\n");
261e264d AQ	236
	237	for (i = 0; i < hash->size; i++) {
	238	head = &hash->table[i];
	239
	240	rcu_read_lock();
	241	hlist_for_each_entry_rcu(orig_node, head, hash_entry) {
	242	neigh_node = batadv_orig_router_get(orig_node,
	243	if_outgoing);
	244	if (!neigh_node)
	245	continue;
	246
	247	n_ifinfo = batadv_neigh_ifinfo_get(neigh_node,
	248	if_outgoing);
	249	if (!n_ifinfo)
	250	goto next;
	251
	252	last_seen_jiffies = jiffies - orig_node->last_seen;
	253	last_seen_msecs = jiffies_to_msecs(last_seen_jiffies);
	254	last_seen_secs = last_seen_msecs / 1000;
	255	last_seen_msecs = last_seen_msecs % 1000;
	256
	257	seq_printf(seq, "%pM %4i.%03is (%9u.%1u) %pM [%10s]:",
	258	orig_node->orig, last_seen_secs,
	259	last_seen_msecs,
	260	n_ifinfo->bat_v.throughput / 10,
	261	n_ifinfo->bat_v.throughput % 10,
	262	neigh_node->addr,
	263	neigh_node->if_incoming->net_dev->name);
	264
	265	batadv_v_orig_print_neigh(orig_node, if_outgoing, seq);
	266	seq_puts(seq, "\n");
	267	batman_count++;
	268
	269	next:
	270	batadv_neigh_node_put(neigh_node);
	271	if (n_ifinfo)
	272	batadv_neigh_ifinfo_put(n_ifinfo);
	273	}
	274	rcu_read_unlock();
	275	}
	276
	277	if (batman_count == 0)
	278	seq_puts(seq, "No batman nodes in range ...\n");
	279	}
	280
97869060 AQ	281	static int batadv_v_neigh_cmp(struct batadv_neigh_node *neigh1,
	282	struct batadv_hard_iface *if_outgoing1,
	283	struct batadv_neigh_node *neigh2,
	284	struct batadv_hard_iface *if_outgoing2)
	285	{
	286	struct batadv_neigh_ifinfo ifinfo1, ifinfo2;
71f9d27d	287	int ret = 0;
97869060 AQ	288
97869060 AQ	289	ifinfo1 = batadv_neigh_ifinfo_get(neigh1, if_outgoing1);
71f9d27d SE	290	if (WARN_ON(!ifinfo1))
	291	goto err_ifinfo1;
	292
97869060	293	ifinfo2 = batadv_neigh_ifinfo_get(neigh2, if_outgoing2);
71f9d27d SE	294	if (WARN_ON(!ifinfo2))
71f9d27d SE	295	goto err_ifinfo2;
97869060	296
71f9d27d	297	ret = ifinfo1->bat_v.throughput - ifinfo2->bat_v.throughput;
97869060	298
71f9d27d SE	299	batadv_neigh_ifinfo_put(ifinfo2);
	300	err_ifinfo2:
	301	batadv_neigh_ifinfo_put(ifinfo1);
	302	err_ifinfo1:
	303	return ret;
97869060 AQ	304	}
	305
	306	static bool batadv_v_neigh_is_sob(struct batadv_neigh_node *neigh1,
	307	struct batadv_hard_iface *if_outgoing1,
	308	struct batadv_neigh_node *neigh2,
	309	struct batadv_hard_iface *if_outgoing2)
	310	{
	311	struct batadv_neigh_ifinfo ifinfo1, ifinfo2;
	312	u32 threshold;
71f9d27d	313	bool ret = false;
97869060 AQ	314
97869060 AQ	315	ifinfo1 = batadv_neigh_ifinfo_get(neigh1, if_outgoing1);
71f9d27d SE	316	if (WARN_ON(!ifinfo1))
71f9d27d SE	317	goto err_ifinfo1;
97869060	318
71f9d27d SE	319	ifinfo2 = batadv_neigh_ifinfo_get(neigh2, if_outgoing2);
	320	if (WARN_ON(!ifinfo2))
	321	goto err_ifinfo2;
a45e932a	322
97869060 AQ	323	threshold = ifinfo1->bat_v.throughput / 4;
	324	threshold = ifinfo1->bat_v.throughput - threshold;
	325
71f9d27d SE	326	ret = ifinfo2->bat_v.throughput > threshold;
	327
	328	batadv_neigh_ifinfo_put(ifinfo2);
	329	err_ifinfo2:
	330	batadv_neigh_ifinfo_put(ifinfo1);
	331	err_ifinfo1:
	332	return ret;
97869060 AQ	333	}
97869060 AQ	334
d6f94d91 LL	335	static struct batadv_algo_ops batadv_batman_v __read_mostly = {
d6f94d91 LL	336	.name = "BATMAN_V",
b6cf5d49	337	.bat_iface_activate = batadv_v_iface_activate,
d6f94d91 LL	338	.bat_iface_enable = batadv_v_iface_enable,
	339	.bat_iface_disable = batadv_v_iface_disable,
	340	.bat_iface_update_mac = batadv_v_iface_update_mac,
	341	.bat_primary_iface_set = batadv_v_primary_iface_set,
162bd64c	342	.bat_hardif_neigh_init = batadv_v_hardif_neigh_init,
d6f94d91 LL	343	.bat_ogm_emit = batadv_v_ogm_emit,
d6f94d91 LL	344	.bat_ogm_schedule = batadv_v_ogm_schedule,
261e264d	345	.bat_orig_print = batadv_v_orig_print,
97869060 AQ	346	.bat_neigh_cmp = batadv_v_neigh_cmp,
97869060 AQ	347	.bat_neigh_is_similar_or_better = batadv_v_neigh_is_sob,
626d23e8	348	.bat_neigh_print = batadv_v_neigh_print,
d6f94d91 LL	349	};
d6f94d91 LL	350
0da00359 AQ	351	/**
	352	* batadv_v_mesh_init - initialize the B.A.T.M.A.N. V private resources for a
	353	* mesh
	354	* @bat_priv: the object representing the mesh interface to initialise
	355	*
	356	* Return: 0 on success or a negative error code otherwise
	357	*/
	358	int batadv_v_mesh_init(struct batadv_priv *bat_priv)
	359	{
	360	return batadv_v_ogm_init(bat_priv);
	361	}
	362
	363	/**
	364	* batadv_v_mesh_free - free the B.A.T.M.A.N. V private resources for a mesh
	365	* @bat_priv: the object representing the mesh interface to free
	366	*/
	367	void batadv_v_mesh_free(struct batadv_priv *bat_priv)
	368	{
	369	batadv_v_ogm_free(bat_priv);
	370	}
	371
d6f94d91 LL	372	/**
	373	* batadv_v_init - B.A.T.M.A.N. V initialization function
	374	*
	375	* Description: Takes care of initializing all the subcomponents.
	376	* It is invoked upon module load only.
	377	*
	378	* Return: 0 on success or a negative error code otherwise
	379	*/
	380	int __init batadv_v_init(void)
	381	{
162bd64c LL	382	int ret;
	383
	384	/* B.A.T.M.A.N. V echo location protocol packet */
	385	ret = batadv_recv_handler_register(BATADV_ELP,
	386	batadv_v_elp_packet_recv);
	387	if (ret < 0)
	388	return ret;
	389
0da00359 AQ	390	ret = batadv_recv_handler_register(BATADV_OGM2,
	391	batadv_v_ogm_packet_recv);
	392	if (ret < 0)
	393	goto elp_unregister;
162bd64c	394
0da00359	395	ret = batadv_algo_register(&batadv_batman_v);
162bd64c	396	if (ret < 0)
0da00359 AQ	397	goto ogm_unregister;
	398
	399	return ret;
	400
	401	ogm_unregister:
	402	batadv_recv_handler_unregister(BATADV_OGM2);
	403
	404	elp_unregister:
	405	batadv_recv_handler_unregister(BATADV_ELP);
162bd64c LL	406
162bd64c LL	407	return ret;
d6f94d91	408	}