[deliverable/linux.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);

	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);
}

/**
 * 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_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_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)
{
	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
	73	return ret;
d6f94d91 LL	74	}
	75
	76	static void batadv_v_iface_disable(struct batadv_hard_iface *hard_iface)
	77	{
	78	batadv_v_elp_iface_disable(hard_iface);
	79	}
	80
d6f94d91 LL	81	static void batadv_v_primary_iface_set(struct batadv_hard_iface *hard_iface)
	82	{
	83	batadv_v_elp_primary_iface_set(hard_iface);
0da00359	84	batadv_v_ogm_primary_iface_set(hard_iface);
d6f94d91 LL	85	}
d6f94d91 LL	86
1653f61d AQ	87	/**
	88	* batadv_v_iface_update_mac - react to hard-interface MAC address change
	89	* @hard_iface: the modified interface
	90	*
	91	* If the modified interface is the primary one, update the originator
	92	* address in the ELP and OGM messages to reflect the new MAC address.
	93	*/
	94	static void batadv_v_iface_update_mac(struct batadv_hard_iface *hard_iface)
	95	{
	96	struct batadv_priv *bat_priv = netdev_priv(hard_iface->soft_iface);
	97	struct batadv_hard_iface *primary_if;
	98
	99	primary_if = batadv_primary_if_get_selected(bat_priv);
	100	if (primary_if != hard_iface)
	101	goto out;
	102
	103	batadv_v_primary_iface_set(hard_iface);
	104	out:
	105	if (primary_if)
	106	batadv_hardif_put(primary_if);
	107	}
	108
162bd64c LL	109	static void
	110	batadv_v_hardif_neigh_init(struct batadv_hardif_neigh_node *hardif_neigh)
	111	{
	112	ewma_throughput_init(&hardif_neigh->bat_v.throughput);
c833484e AQ	113	INIT_WORK(&hardif_neigh->bat_v.metric_work,
c833484e AQ	114	batadv_v_elp_throughput_metric_update);
162bd64c LL	115	}
162bd64c LL	116
261e264d AQ	117	/**
	118	* batadv_v_orig_print_neigh - print neighbors for the originator table
	119	* @orig_node: the orig_node for which the neighbors are printed
	120	* @if_outgoing: outgoing interface for these entries
	121	* @seq: debugfs table seq_file struct
	122	*
	123	* Must be called while holding an rcu lock.
	124	*/
	125	static void
	126	batadv_v_orig_print_neigh(struct batadv_orig_node *orig_node,
	127	struct batadv_hard_iface *if_outgoing,
	128	struct seq_file *seq)
	129	{
	130	struct batadv_neigh_node *neigh_node;
	131	struct batadv_neigh_ifinfo *n_ifinfo;
	132
	133	hlist_for_each_entry_rcu(neigh_node, &orig_node->neigh_list, list) {
	134	n_ifinfo = batadv_neigh_ifinfo_get(neigh_node, if_outgoing);
	135	if (!n_ifinfo)
	136	continue;
	137
	138	seq_printf(seq, " %pM (%9u.%1u)",
	139	neigh_node->addr,
	140	n_ifinfo->bat_v.throughput / 10,
	141	n_ifinfo->bat_v.throughput % 10);
	142
	143	batadv_neigh_ifinfo_put(n_ifinfo);
	144	}
	145	}
	146
626d23e8 LL	147	/**
	148	* batadv_v_hardif_neigh_print - print a single ELP neighbour node
	149	* @seq: neighbour table seq_file struct
	150	* @hardif_neigh: hardif neighbour information
	151	*/
	152	static void
	153	batadv_v_hardif_neigh_print(struct seq_file *seq,
	154	struct batadv_hardif_neigh_node *hardif_neigh)
	155	{
	156	int last_secs, last_msecs;
	157	u32 throughput;
	158
	159	last_secs = jiffies_to_msecs(jiffies - hardif_neigh->last_seen) / 1000;
	160	last_msecs = jiffies_to_msecs(jiffies - hardif_neigh->last_seen) % 1000;
	161	throughput = ewma_throughput_read(&hardif_neigh->bat_v.throughput);
	162
	163	seq_printf(seq, "%pM %4i.%03is (%9u.%1u) [%10s]\n",
	164	hardif_neigh->addr, last_secs, last_msecs, throughput / 10,
	165	throughput % 10, hardif_neigh->if_incoming->net_dev->name);
	166	}
	167
	168	/**
	169	* batadv_v_neigh_print - print the single hop neighbour list
	170	* @bat_priv: the bat priv with all the soft interface information
	171	* @seq: neighbour table seq_file struct
	172	*/
	173	static void batadv_v_neigh_print(struct batadv_priv *bat_priv,
	174	struct seq_file *seq)
	175	{
	176	struct net_device net_dev = (struct net_device )seq->private;
	177	struct batadv_hardif_neigh_node *hardif_neigh;
	178	struct batadv_hard_iface *hard_iface;
	179	int batman_count = 0;
	180
925a6f37 AQ	181	seq_puts(seq,
925a6f37 AQ	182	" Neighbor last-seen ( throughput) [ IF]\n");
626d23e8 LL	183
	184	rcu_read_lock();
	185	list_for_each_entry_rcu(hard_iface, &batadv_hardif_list, list) {
	186	if (hard_iface->soft_iface != net_dev)
	187	continue;
	188
	189	hlist_for_each_entry_rcu(hardif_neigh,
	190	&hard_iface->neigh_list, list) {
	191	batadv_v_hardif_neigh_print(seq, hardif_neigh);
	192	batman_count++;
	193	}
	194	}
	195	rcu_read_unlock();
	196
	197	if (batman_count == 0)
	198	seq_puts(seq, "No batman nodes in range ...\n");
	199	}
	200
261e264d AQ	201	/**
	202	* batadv_v_orig_print - print the originator table
	203	* @bat_priv: the bat priv with all the soft interface information
	204	* @seq: debugfs table seq_file struct
	205	* @if_outgoing: the outgoing interface for which this should be printed
	206	*/
	207	static void batadv_v_orig_print(struct batadv_priv *bat_priv,
	208	struct seq_file *seq,
	209	struct batadv_hard_iface *if_outgoing)
	210	{
	211	struct batadv_neigh_node *neigh_node;
	212	struct batadv_hashtable *hash = bat_priv->orig_hash;
	213	int last_seen_msecs, last_seen_secs;
	214	struct batadv_orig_node *orig_node;
	215	struct batadv_neigh_ifinfo *n_ifinfo;
	216	unsigned long last_seen_jiffies;
	217	struct hlist_head *head;
	218	int batman_count = 0;
	219	u32 i;
	220
925a6f37 AQ	221	seq_puts(seq,
925a6f37 AQ	222	" Originator last-seen ( throughput) Nexthop [outgoingIF]: Potential nexthops ...\n");
261e264d AQ	223
	224	for (i = 0; i < hash->size; i++) {
	225	head = &hash->table[i];
	226
	227	rcu_read_lock();
	228	hlist_for_each_entry_rcu(orig_node, head, hash_entry) {
	229	neigh_node = batadv_orig_router_get(orig_node,
	230	if_outgoing);
	231	if (!neigh_node)
	232	continue;
	233
	234	n_ifinfo = batadv_neigh_ifinfo_get(neigh_node,
	235	if_outgoing);
	236	if (!n_ifinfo)
	237	goto next;
	238
	239	last_seen_jiffies = jiffies - orig_node->last_seen;
	240	last_seen_msecs = jiffies_to_msecs(last_seen_jiffies);
	241	last_seen_secs = last_seen_msecs / 1000;
	242	last_seen_msecs = last_seen_msecs % 1000;
	243
	244	seq_printf(seq, "%pM %4i.%03is (%9u.%1u) %pM [%10s]:",
	245	orig_node->orig, last_seen_secs,
	246	last_seen_msecs,
	247	n_ifinfo->bat_v.throughput / 10,
	248	n_ifinfo->bat_v.throughput % 10,
	249	neigh_node->addr,
	250	neigh_node->if_incoming->net_dev->name);
	251
	252	batadv_v_orig_print_neigh(orig_node, if_outgoing, seq);
	253	seq_puts(seq, "\n");
	254	batman_count++;
	255
	256	next:
	257	batadv_neigh_node_put(neigh_node);
	258	if (n_ifinfo)
	259	batadv_neigh_ifinfo_put(n_ifinfo);
	260	}
	261	rcu_read_unlock();
	262	}
	263
	264	if (batman_count == 0)
	265	seq_puts(seq, "No batman nodes in range ...\n");
	266	}
	267
97869060 AQ	268	static int batadv_v_neigh_cmp(struct batadv_neigh_node *neigh1,
	269	struct batadv_hard_iface *if_outgoing1,
	270	struct batadv_neigh_node *neigh2,
	271	struct batadv_hard_iface *if_outgoing2)
	272	{
	273	struct batadv_neigh_ifinfo ifinfo1, ifinfo2;
71f9d27d	274	int ret = 0;
97869060 AQ	275
97869060 AQ	276	ifinfo1 = batadv_neigh_ifinfo_get(neigh1, if_outgoing1);
71f9d27d SE	277	if (WARN_ON(!ifinfo1))
	278	goto err_ifinfo1;
	279
97869060	280	ifinfo2 = batadv_neigh_ifinfo_get(neigh2, if_outgoing2);
71f9d27d SE	281	if (WARN_ON(!ifinfo2))
71f9d27d SE	282	goto err_ifinfo2;
97869060	283
71f9d27d	284	ret = ifinfo1->bat_v.throughput - ifinfo2->bat_v.throughput;
97869060	285
71f9d27d SE	286	batadv_neigh_ifinfo_put(ifinfo2);
	287	err_ifinfo2:
	288	batadv_neigh_ifinfo_put(ifinfo1);
	289	err_ifinfo1:
	290	return ret;
97869060 AQ	291	}
	292
	293	static bool batadv_v_neigh_is_sob(struct batadv_neigh_node *neigh1,
	294	struct batadv_hard_iface *if_outgoing1,
	295	struct batadv_neigh_node *neigh2,
	296	struct batadv_hard_iface *if_outgoing2)
	297	{
	298	struct batadv_neigh_ifinfo ifinfo1, ifinfo2;
	299	u32 threshold;
71f9d27d	300	bool ret = false;
97869060 AQ	301
97869060 AQ	302	ifinfo1 = batadv_neigh_ifinfo_get(neigh1, if_outgoing1);
71f9d27d SE	303	if (WARN_ON(!ifinfo1))
71f9d27d SE	304	goto err_ifinfo1;
97869060	305
71f9d27d SE	306	ifinfo2 = batadv_neigh_ifinfo_get(neigh2, if_outgoing2);
	307	if (WARN_ON(!ifinfo2))
	308	goto err_ifinfo2;
a45e932a	309
97869060 AQ	310	threshold = ifinfo1->bat_v.throughput / 4;
	311	threshold = ifinfo1->bat_v.throughput - threshold;
	312
71f9d27d SE	313	ret = ifinfo2->bat_v.throughput > threshold;
	314
	315	batadv_neigh_ifinfo_put(ifinfo2);
	316	err_ifinfo2:
	317	batadv_neigh_ifinfo_put(ifinfo1);
	318	err_ifinfo1:
	319	return ret;
97869060 AQ	320	}
97869060 AQ	321
d6f94d91 LL	322	static struct batadv_algo_ops batadv_batman_v __read_mostly = {
d6f94d91 LL	323	.name = "BATMAN_V",
b6cf5d49	324	.bat_iface_activate = batadv_v_iface_activate,
d6f94d91 LL	325	.bat_iface_enable = batadv_v_iface_enable,
	326	.bat_iface_disable = batadv_v_iface_disable,
	327	.bat_iface_update_mac = batadv_v_iface_update_mac,
	328	.bat_primary_iface_set = batadv_v_primary_iface_set,
162bd64c	329	.bat_hardif_neigh_init = batadv_v_hardif_neigh_init,
261e264d	330	.bat_orig_print = batadv_v_orig_print,
97869060 AQ	331	.bat_neigh_cmp = batadv_v_neigh_cmp,
97869060 AQ	332	.bat_neigh_is_similar_or_better = batadv_v_neigh_is_sob,
626d23e8	333	.bat_neigh_print = batadv_v_neigh_print,
d6f94d91 LL	334	};
d6f94d91 LL	335
7db682d1 ML	336	/**
	337	* batadv_v_hardif_init - initialize the algorithm specific fields in the
	338	* hard-interface object
	339	* @hard_iface: the hard-interface to initialize
	340	*/
	341	void batadv_v_hardif_init(struct batadv_hard_iface *hard_iface)
	342	{
	343	/* enable link throughput auto-detection by setting the throughput
	344	* override to zero
	345	*/
	346	atomic_set(&hard_iface->bat_v.throughput_override, 0);
	347	atomic_set(&hard_iface->bat_v.elp_interval, 500);
	348	}
	349
0da00359 AQ	350	/**
	351	* batadv_v_mesh_init - initialize the B.A.T.M.A.N. V private resources for a
	352	* mesh
	353	* @bat_priv: the object representing the mesh interface to initialise
	354	*
	355	* Return: 0 on success or a negative error code otherwise
	356	*/
	357	int batadv_v_mesh_init(struct batadv_priv *bat_priv)
	358	{
	359	return batadv_v_ogm_init(bat_priv);
	360	}
	361
	362	/**
	363	* batadv_v_mesh_free - free the B.A.T.M.A.N. V private resources for a mesh
	364	* @bat_priv: the object representing the mesh interface to free
	365	*/
	366	void batadv_v_mesh_free(struct batadv_priv *bat_priv)
	367	{
	368	batadv_v_ogm_free(bat_priv);
	369	}
	370
d6f94d91 LL	371	/**
	372	* batadv_v_init - B.A.T.M.A.N. V initialization function
	373	*
	374	* Description: Takes care of initializing all the subcomponents.
	375	* It is invoked upon module load only.
	376	*
	377	* Return: 0 on success or a negative error code otherwise
	378	*/
	379	int __init batadv_v_init(void)
	380	{
162bd64c LL	381	int ret;
	382
	383	/* B.A.T.M.A.N. V echo location protocol packet */
	384	ret = batadv_recv_handler_register(BATADV_ELP,
	385	batadv_v_elp_packet_recv);
	386	if (ret < 0)
	387	return ret;
	388
0da00359 AQ	389	ret = batadv_recv_handler_register(BATADV_OGM2,
	390	batadv_v_ogm_packet_recv);
	391	if (ret < 0)
	392	goto elp_unregister;
162bd64c	393
0da00359	394	ret = batadv_algo_register(&batadv_batman_v);
162bd64c	395	if (ret < 0)
0da00359 AQ	396	goto ogm_unregister;
	397
	398	return ret;
	399
	400	ogm_unregister:
	401	batadv_recv_handler_unregister(BATADV_OGM2);
	402
	403	elp_unregister:
	404	batadv_recv_handler_unregister(BATADV_ELP);
162bd64c LL	405
162bd64c LL	406	return ret;
d6f94d91	407	}