[mirror_ubuntu-bionic-kernel.git] / drivers / staging / batman-adv / originator.c

/*
 * Copyright (C) 2009-2010 B.A.T.M.A.N. contributors:
 *
 * Marek Lindner, Simon Wunderlich
 *
 * 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, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
 * 02110-1301, USA
 *
 */

/* increase the reference counter for this originator */

#include "main.h"
#include "originator.h"
#include "hash.h"
#include "translation-table.h"
#include "routing.h"
#include "hard-interface.h"
#include "unicast.h"

static void purge_orig(struct work_struct *work);

static void start_purge_timer(struct bat_priv *bat_priv)
{
	INIT_DELAYED_WORK(&bat_priv->orig_work, purge_orig);
	queue_delayed_work(bat_event_workqueue, &bat_priv->orig_work, 1 * HZ);
}

int originator_init(struct bat_priv *bat_priv)
{
	unsigned long flags;
	if (bat_priv->orig_hash)
		return 1;

	spin_lock_irqsave(&bat_priv->orig_hash_lock, flags);
	bat_priv->orig_hash = hash_new(128, compare_orig, choose_orig);

	if (!bat_priv->orig_hash)
		goto err;

	spin_unlock_irqrestore(&bat_priv->orig_hash_lock, flags);
	start_purge_timer(bat_priv);
	return 1;

err:
	spin_unlock_irqrestore(&bat_priv->orig_hash_lock, flags);
	return 0;
}

struct neigh_node *
create_neighbor(struct orig_node *orig_node, struct orig_node *orig_neigh_node,
		uint8_t *neigh, struct batman_if *if_incoming)
{
	struct bat_priv *bat_priv = netdev_priv(if_incoming->soft_iface);
	struct neigh_node *neigh_node;

	bat_dbg(DBG_BATMAN, bat_priv,
		"Creating new last-hop neighbor of originator\n");

	neigh_node = kzalloc(sizeof(struct neigh_node), GFP_ATOMIC);
	if (!neigh_node)
		return NULL;

	INIT_LIST_HEAD(&neigh_node->list);

	memcpy(neigh_node->addr, neigh, ETH_ALEN);
	neigh_node->orig_node = orig_neigh_node;
	neigh_node->if_incoming = if_incoming;

	list_add_tail(&neigh_node->list, &orig_node->neigh_list);
	return neigh_node;
}

static void free_orig_node(void *data, void *arg)
{
	struct list_head *list_pos, *list_pos_tmp;
	struct neigh_node *neigh_node;
	struct orig_node *orig_node = (struct orig_node *)data;
	struct bat_priv *bat_priv = (struct bat_priv *)arg;

	/* for all neighbors towards this originator ... */
	list_for_each_safe(list_pos, list_pos_tmp, &orig_node->neigh_list) {
		neigh_node = list_entry(list_pos, struct neigh_node, list);

		list_del(list_pos);
		kfree(neigh_node);
	}

	frag_list_free(&orig_node->frag_list);
	hna_global_del_orig(bat_priv, orig_node, "originator timed out");

	kfree(orig_node->bcast_own);
	kfree(orig_node->bcast_own_sum);
	kfree(orig_node);
}

void originator_free(struct bat_priv *bat_priv)
{
	unsigned long flags;

	if (!bat_priv->orig_hash)
		return;

	cancel_delayed_work_sync(&bat_priv->orig_work);

	spin_lock_irqsave(&bat_priv->orig_hash_lock, flags);
	hash_delete(bat_priv->orig_hash, free_orig_node, bat_priv);
	bat_priv->orig_hash = NULL;
	spin_unlock_irqrestore(&bat_priv->orig_hash_lock, flags);
}

/* this function finds or creates an originator entry for the given
 * address if it does not exits */
struct orig_node *get_orig_node(struct bat_priv *bat_priv, uint8_t *addr)
{
	struct orig_node *orig_node;
	struct hashtable_t *swaphash;
	int size;

	orig_node = ((struct orig_node *)hash_find(bat_priv->orig_hash, addr));

	if (orig_node)
		return orig_node;

	bat_dbg(DBG_BATMAN, bat_priv,
		"Creating new originator: %pM\n", addr);

	orig_node = kzalloc(sizeof(struct orig_node), GFP_ATOMIC);
	if (!orig_node)
		return NULL;

	INIT_LIST_HEAD(&orig_node->neigh_list);

	memcpy(orig_node->orig, addr, ETH_ALEN);
	orig_node->router = NULL;
	orig_node->hna_buff = NULL;
	orig_node->bcast_seqno_reset = jiffies - 1
					- msecs_to_jiffies(RESET_PROTECTION_MS);
	orig_node->batman_seqno_reset = jiffies - 1
					- msecs_to_jiffies(RESET_PROTECTION_MS);

	size = bat_priv->num_ifaces * sizeof(TYPE_OF_WORD) * NUM_WORDS;

	orig_node->bcast_own = kzalloc(size, GFP_ATOMIC);
	if (!orig_node->bcast_own)
		goto free_orig_node;

	size = bat_priv->num_ifaces * sizeof(uint8_t);
	orig_node->bcast_own_sum = kzalloc(size, GFP_ATOMIC);

	INIT_LIST_HEAD(&orig_node->frag_list);
	orig_node->last_frag_packet = 0;

	if (!orig_node->bcast_own_sum)
		goto free_bcast_own;

	if (hash_add(bat_priv->orig_hash, orig_node) < 0)
		goto free_bcast_own_sum;

	if (bat_priv->orig_hash->elements * 4 > bat_priv->orig_hash->size) {
		swaphash = hash_resize(bat_priv->orig_hash,
				       bat_priv->orig_hash->size * 2);

		if (!swaphash)
			bat_dbg(DBG_BATMAN, bat_priv,
				"Couldn't resize orig hash table\n");
		else
			bat_priv->orig_hash = swaphash;
	}

	return orig_node;
free_bcast_own_sum:
	kfree(orig_node->bcast_own_sum);
free_bcast_own:
	kfree(orig_node->bcast_own);
free_orig_node:
	kfree(orig_node);
	return NULL;
}

static bool purge_orig_neighbors(struct bat_priv *bat_priv,
				 struct orig_node *orig_node,
				 struct neigh_node **best_neigh_node)
{
	struct list_head *list_pos, *list_pos_tmp;
	struct neigh_node *neigh_node;
	bool neigh_purged = false;

	*best_neigh_node = NULL;

	/* for all neighbors towards this originator ... */
	list_for_each_safe(list_pos, list_pos_tmp, &orig_node->neigh_list) {
		neigh_node = list_entry(list_pos, struct neigh_node, list);

		if ((time_after(jiffies,
			neigh_node->last_valid + PURGE_TIMEOUT * HZ)) ||
		    (neigh_node->if_incoming->if_status == IF_INACTIVE) ||
		    (neigh_node->if_incoming->if_status == IF_TO_BE_REMOVED)) {

			if (neigh_node->if_incoming->if_status ==
							IF_TO_BE_REMOVED)
				bat_dbg(DBG_BATMAN, bat_priv,
					"neighbor purge: originator %pM, "
					"neighbor: %pM, iface: %s\n",
					orig_node->orig, neigh_node->addr,
					neigh_node->if_incoming->net_dev->name);
			else
				bat_dbg(DBG_BATMAN, bat_priv,
					"neighbor timeout: originator %pM, "
					"neighbor: %pM, last_valid: %lu\n",
					orig_node->orig, neigh_node->addr,
					(neigh_node->last_valid / HZ));

			neigh_purged = true;
			list_del(list_pos);
			kfree(neigh_node);
		} else {
			if ((*best_neigh_node == NULL) ||
			    (neigh_node->tq_avg > (*best_neigh_node)->tq_avg))
				*best_neigh_node = neigh_node;
		}
	}
	return neigh_purged;
}

static bool purge_orig_node(struct bat_priv *bat_priv,
			    struct orig_node *orig_node)
{
	struct neigh_node *best_neigh_node;

	if (time_after(jiffies,
		orig_node->last_valid + 2 * PURGE_TIMEOUT * HZ)) {

		bat_dbg(DBG_BATMAN, bat_priv,
			"Originator timeout: originator %pM, last_valid %lu\n",
			orig_node->orig, (orig_node->last_valid / HZ));
		return true;
	} else {
		if (purge_orig_neighbors(bat_priv, orig_node,
							&best_neigh_node)) {
			update_routes(bat_priv, orig_node,
				      best_neigh_node,
				      orig_node->hna_buff,
				      orig_node->hna_buff_len);
			/* update bonding candidates, we could have lost
			 * some candidates. */
			update_bonding_candidates(bat_priv, orig_node);
		}
	}

	return false;
}

static void _purge_orig(struct bat_priv *bat_priv)
{
	HASHIT(hashit);
	struct orig_node *orig_node;
	unsigned long flags;

	spin_lock_irqsave(&bat_priv->orig_hash_lock, flags);

	/* for all origins... */
	while (hash_iterate(bat_priv->orig_hash, &hashit)) {
		orig_node = hashit.bucket->data;

		if (purge_orig_node(bat_priv, orig_node)) {
			hash_remove_bucket(bat_priv->orig_hash, &hashit);
			free_orig_node(orig_node, bat_priv);
		}

		if (time_after(jiffies, (orig_node->last_frag_packet +
					msecs_to_jiffies(FRAG_TIMEOUT))))
			frag_list_free(&orig_node->frag_list);
	}

	spin_unlock_irqrestore(&bat_priv->orig_hash_lock, flags);

}

static void purge_orig(struct work_struct *work)
{
	struct delayed_work *delayed_work =
		container_of(work, struct delayed_work, work);
	struct bat_priv *bat_priv =
		container_of(delayed_work, struct bat_priv, orig_work);

	_purge_orig(bat_priv);
	start_purge_timer(bat_priv);
}

void purge_orig_ref(struct bat_priv *bat_priv)
{
	_purge_orig(bat_priv);
}

int orig_seq_print_text(struct seq_file *seq, void *offset)
{
	HASHIT(hashit);
	struct net_device *net_dev = (struct net_device *)seq->private;
	struct bat_priv *bat_priv = netdev_priv(net_dev);
	struct orig_node *orig_node;
	struct neigh_node *neigh_node;
	int batman_count = 0;
	int last_seen_secs;
	int last_seen_msecs;
	unsigned long flags;
	char orig_str[ETH_STR_LEN], router_str[ETH_STR_LEN];

	if ((!bat_priv->primary_if) ||
	    (bat_priv->primary_if->if_status != IF_ACTIVE)) {
		if (!bat_priv->primary_if)
			return seq_printf(seq, "BATMAN mesh %s disabled - "
				     "please specify interfaces to enable it\n",
				     net_dev->name);

		return seq_printf(seq, "BATMAN mesh %s "
				  "disabled - primary interface not active\n",
				  net_dev->name);
	}

	seq_printf(seq, "[B.A.T.M.A.N. adv %s%s, MainIF/MAC: %s/%s (%s)]\n",
		   SOURCE_VERSION, REVISION_VERSION_STR,
		   bat_priv->primary_if->net_dev->name,
		   bat_priv->primary_if->addr_str, net_dev->name);
	seq_printf(seq, "  %-15s %s (%s/%i) %17s [%10s]: %20s ...\n",
		   "Originator", "last-seen", "#", TQ_MAX_VALUE, "Nexthop",
		   "outgoingIF", "Potential nexthops");

	spin_lock_irqsave(&bat_priv->orig_hash_lock, flags);

	while (hash_iterate(bat_priv->orig_hash, &hashit)) {

		orig_node = hashit.bucket->data;

		if (!orig_node->router)
			continue;

		if (orig_node->router->tq_avg == 0)
			continue;

		addr_to_string(orig_str, orig_node->orig);
		addr_to_string(router_str, orig_node->router->addr);
		last_seen_secs = jiffies_to_msecs(jiffies -
						orig_node->last_valid) / 1000;
		last_seen_msecs = jiffies_to_msecs(jiffies -
						orig_node->last_valid) % 1000;

		seq_printf(seq, "%-17s %4i.%03is   (%3i) %17s [%10s]:",
			   orig_str, last_seen_secs, last_seen_msecs,
			   orig_node->router->tq_avg, router_str,
			   orig_node->router->if_incoming->net_dev->name);

		list_for_each_entry(neigh_node, &orig_node->neigh_list, list) {
			addr_to_string(orig_str, neigh_node->addr);
			seq_printf(seq, " %17s (%3i)", orig_str,
					   neigh_node->tq_avg);
		}

		seq_printf(seq, "\n");
		batman_count++;
	}

	spin_unlock_irqrestore(&bat_priv->orig_hash_lock, flags);

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

	return 0;
}

static int orig_node_add_if(struct orig_node *orig_node, int max_if_num)
{
	void *data_ptr;

	data_ptr = kmalloc(max_if_num * sizeof(TYPE_OF_WORD) * NUM_WORDS,
			   GFP_ATOMIC);
	if (!data_ptr) {
		pr_err("Can't resize orig: out of memory\n");
		return -1;
	}

	memcpy(data_ptr, orig_node->bcast_own,
	       (max_if_num - 1) * sizeof(TYPE_OF_WORD) * NUM_WORDS);
	kfree(orig_node->bcast_own);
	orig_node->bcast_own = data_ptr;

	data_ptr = kmalloc(max_if_num * sizeof(uint8_t), GFP_ATOMIC);
	if (!data_ptr) {
		pr_err("Can't resize orig: out of memory\n");
		return -1;
	}

	memcpy(data_ptr, orig_node->bcast_own_sum,
	       (max_if_num - 1) * sizeof(uint8_t));
	kfree(orig_node->bcast_own_sum);
	orig_node->bcast_own_sum = data_ptr;

	return 0;
}

int orig_hash_add_if(struct batman_if *batman_if, int max_if_num)
{
	struct bat_priv *bat_priv = netdev_priv(batman_if->soft_iface);
	struct orig_node *orig_node;
	unsigned long flags;
	HASHIT(hashit);

	/* resize all orig nodes because orig_node->bcast_own(_sum) depend on
	 * if_num */
	spin_lock_irqsave(&bat_priv->orig_hash_lock, flags);

	while (hash_iterate(bat_priv->orig_hash, &hashit)) {
		orig_node = hashit.bucket->data;

		if (orig_node_add_if(orig_node, max_if_num) == -1)
			goto err;
	}

	spin_unlock_irqrestore(&bat_priv->orig_hash_lock, flags);
	return 0;

err:
	spin_unlock_irqrestore(&bat_priv->orig_hash_lock, flags);
	return -ENOMEM;
}

static int orig_node_del_if(struct orig_node *orig_node,
		     int max_if_num, int del_if_num)
{
	void *data_ptr = NULL;
	int chunk_size;

	/* last interface was removed */
	if (max_if_num == 0)
		goto free_bcast_own;

	chunk_size = sizeof(TYPE_OF_WORD) * NUM_WORDS;
	data_ptr = kmalloc(max_if_num * chunk_size, GFP_ATOMIC);
	if (!data_ptr) {
		pr_err("Can't resize orig: out of memory\n");
		return -1;
	}

	/* copy first part */
	memcpy(data_ptr, orig_node->bcast_own, del_if_num * chunk_size);

	/* copy second part */
	memcpy(data_ptr + del_if_num * chunk_size,
	       orig_node->bcast_own + ((del_if_num + 1) * chunk_size),
	       (max_if_num - del_if_num) * chunk_size);

free_bcast_own:
	kfree(orig_node->bcast_own);
	orig_node->bcast_own = data_ptr;

	if (max_if_num == 0)
		goto free_own_sum;

	data_ptr = kmalloc(max_if_num * sizeof(uint8_t), GFP_ATOMIC);
	if (!data_ptr) {
		pr_err("Can't resize orig: out of memory\n");
		return -1;
	}

	memcpy(data_ptr, orig_node->bcast_own_sum,
	       del_if_num * sizeof(uint8_t));

	memcpy(data_ptr + del_if_num * sizeof(uint8_t),
	       orig_node->bcast_own_sum + ((del_if_num + 1) * sizeof(uint8_t)),
	       (max_if_num - del_if_num) * sizeof(uint8_t));

free_own_sum:
	kfree(orig_node->bcast_own_sum);
	orig_node->bcast_own_sum = data_ptr;

	return 0;
}

int orig_hash_del_if(struct batman_if *batman_if, int max_if_num)
{
	struct bat_priv *bat_priv = netdev_priv(batman_if->soft_iface);
	struct batman_if *batman_if_tmp;
	struct orig_node *orig_node;
	unsigned long flags;
	HASHIT(hashit);
	int ret;

	/* resize all orig nodes because orig_node->bcast_own(_sum) depend on
	 * if_num */
	spin_lock_irqsave(&bat_priv->orig_hash_lock, flags);

	while (hash_iterate(bat_priv->orig_hash, &hashit)) {
		orig_node = hashit.bucket->data;

		ret = orig_node_del_if(orig_node, max_if_num,
				       batman_if->if_num);

		if (ret == -1)
			goto err;
	}

	/* renumber remaining batman interfaces _inside_ of orig_hash_lock */
	rcu_read_lock();
	list_for_each_entry_rcu(batman_if_tmp, &if_list, list) {
		if (batman_if_tmp->if_status == IF_NOT_IN_USE)
			continue;

		if (batman_if == batman_if_tmp)
			continue;

		if (batman_if->soft_iface != batman_if_tmp->soft_iface)
			continue;

		if (batman_if_tmp->if_num > batman_if->if_num)
			batman_if_tmp->if_num--;
	}
	rcu_read_unlock();

	batman_if->if_num = -1;
	spin_unlock_irqrestore(&bat_priv->orig_hash_lock, flags);
	return 0;

err:
	spin_unlock_irqrestore(&bat_priv->orig_hash_lock, flags);
	return -ENOMEM;
}
Commit	Line	Data
8a2e042c	1	/*
9b6d10b7	2	* Copyright (C) 2009-2010 B.A.T.M.A.N. contributors:
8a2e042c AL	3	*
	4	* Marek Lindner, Simon Wunderlich
	5	*
	6	* This program is free software; you can redistribute it and/or
	7	* modify it under the terms of version 2 of the GNU General Public
	8	* License as published by the Free Software Foundation.
	9	*
	10	* This program is distributed in the hope that it will be useful, but
	11	* WITHOUT ANY WARRANTY; without even the implied warranty of
	12	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
	13	* General Public License for more details.
	14	*
	15	* You should have received a copy of the GNU General Public License
	16	* along with this program; if not, write to the Free Software
	17	* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
	18	* 02110-1301, USA
	19	*
	20	*/
	21
	22	/* increase the reference counter for this originator */
	23
	24	#include "main.h"
	25	#include "originator.h"
	26	#include "hash.h"
	27	#include "translation-table.h"
	28	#include "routing.h"
14741240	29	#include "hard-interface.h"
e63760e5	30	#include "unicast.h"
8a2e042c	31
8c70f138	32	static void purge_orig(struct work_struct *work);
8a2e042c	33
8c70f138	34	static void start_purge_timer(struct bat_priv *bat_priv)
8a2e042c	35	{
8c70f138 ML	36	INIT_DELAYED_WORK(&bat_priv->orig_work, purge_orig);
8c70f138 ML	37	queue_delayed_work(bat_event_workqueue, &bat_priv->orig_work, 1 * HZ);
8a2e042c AL	38	}
8a2e042c AL	39
8c70f138	40	int originator_init(struct bat_priv *bat_priv)
8a2e042c	41	{
e7017195	42	unsigned long flags;
8c70f138	43	if (bat_priv->orig_hash)
8a2e042c AL	44	return 1;
8a2e042c AL	45
8c70f138 ML	46	spin_lock_irqsave(&bat_priv->orig_hash_lock, flags);
8c70f138 ML	47	bat_priv->orig_hash = hash_new(128, compare_orig, choose_orig);
8a2e042c	48
8c70f138	49	if (!bat_priv->orig_hash)
8a2e042c AL	50	goto err;
8a2e042c AL	51
8c70f138 ML	52	spin_unlock_irqrestore(&bat_priv->orig_hash_lock, flags);
8c70f138 ML	53	start_purge_timer(bat_priv);
8a2e042c AL	54	return 1;
	55
	56	err:
8c70f138	57	spin_unlock_irqrestore(&bat_priv->orig_hash_lock, flags);
8a2e042c AL	58	return 0;
	59	}
	60
8a2e042c AL	61	struct neigh_node *
	62	create_neighbor(struct orig_node orig_node, struct orig_node orig_neigh_node,
	63	uint8_t neigh, struct batman_if if_incoming)
	64	{
6a0e9fa8	65	struct bat_priv *bat_priv = netdev_priv(if_incoming->soft_iface);
8a2e042c AL	66	struct neigh_node *neigh_node;
8a2e042c AL	67
84ec0864 ML	68	bat_dbg(DBG_BATMAN, bat_priv,
84ec0864 ML	69	"Creating new last-hop neighbor of originator\n");
8a2e042c	70
abad5446	71	neigh_node = kzalloc(sizeof(struct neigh_node), GFP_ATOMIC);
c4bf05d3 SW	72	if (!neigh_node)
	73	return NULL;
	74
8a2e042c AL	75	INIT_LIST_HEAD(&neigh_node->list);
	76
	77	memcpy(neigh_node->addr, neigh, ETH_ALEN);
	78	neigh_node->orig_node = orig_neigh_node;
	79	neigh_node->if_incoming = if_incoming;
	80
	81	list_add_tail(&neigh_node->list, &orig_node->neigh_list);
	82	return neigh_node;
	83	}
	84
6a0e9fa8	85	static void free_orig_node(void data, void arg)
8a2e042c AL	86	{
	87	struct list_head list_pos, list_pos_tmp;
	88	struct neigh_node *neigh_node;
	89	struct orig_node orig_node = (struct orig_node )data;
6a0e9fa8	90	struct bat_priv bat_priv = (struct bat_priv )arg;
8a2e042c	91
5ea84fa3	92	/* for all neighbors towards this originator ... */
8a2e042c AL	93	list_for_each_safe(list_pos, list_pos_tmp, &orig_node->neigh_list) {
	94	neigh_node = list_entry(list_pos, struct neigh_node, list);
	95
	96	list_del(list_pos);
	97	kfree(neigh_node);
	98	}
	99
e63760e5	100	frag_list_free(&orig_node->frag_list);
6a0e9fa8	101	hna_global_del_orig(bat_priv, orig_node, "originator timed out");
8a2e042c AL	102
	103	kfree(orig_node->bcast_own);
	104	kfree(orig_node->bcast_own_sum);
	105	kfree(orig_node);
	106	}
	107
8c70f138	108	void originator_free(struct bat_priv *bat_priv)
42fa1b92 SE	109	{
	110	unsigned long flags;
	111
8c70f138	112	if (!bat_priv->orig_hash)
42fa1b92 SE	113	return;
42fa1b92 SE	114
8c70f138	115	cancel_delayed_work_sync(&bat_priv->orig_work);
42fa1b92	116
8c70f138 ML	117	spin_lock_irqsave(&bat_priv->orig_hash_lock, flags);
	118	hash_delete(bat_priv->orig_hash, free_orig_node, bat_priv);
	119	bat_priv->orig_hash = NULL;
	120	spin_unlock_irqrestore(&bat_priv->orig_hash_lock, flags);
42fa1b92 SE	121	}
42fa1b92 SE	122
8a2e042c AL	123	/* this function finds or creates an originator entry for the given
8a2e042c AL	124	* address if it does not exits */
6a0e9fa8	125	struct orig_node get_orig_node(struct bat_priv bat_priv, uint8_t *addr)
8a2e042c AL	126	{
	127	struct orig_node *orig_node;
	128	struct hashtable_t *swaphash;
8a2e042c AL	129	int size;
8a2e042c AL	130
8c70f138	131	orig_node = ((struct orig_node *)hash_find(bat_priv->orig_hash, addr));
8a2e042c	132
8c70f138	133	if (orig_node)
8a2e042c AL	134	return orig_node;
8a2e042c AL	135
84ec0864 ML	136	bat_dbg(DBG_BATMAN, bat_priv,
84ec0864 ML	137	"Creating new originator: %pM\n", addr);
8a2e042c	138
abad5446	139	orig_node = kzalloc(sizeof(struct orig_node), GFP_ATOMIC);
c4bf05d3 SW	140	if (!orig_node)
	141	return NULL;
	142
8a2e042c AL	143	INIT_LIST_HEAD(&orig_node->neigh_list);
	144
	145	memcpy(orig_node->orig, addr, ETH_ALEN);
	146	orig_node->router = NULL;
8a2e042c	147	orig_node->hna_buff = NULL;
6d45d8df SE	148	orig_node->bcast_seqno_reset = jiffies - 1
	149	- msecs_to_jiffies(RESET_PROTECTION_MS);
	150	orig_node->batman_seqno_reset = jiffies - 1
	151	- msecs_to_jiffies(RESET_PROTECTION_MS);
8a2e042c	152
208e13e4	153	size = bat_priv->num_ifaces * sizeof(TYPE_OF_WORD) * NUM_WORDS;
8a2e042c	154
abad5446	155	orig_node->bcast_own = kzalloc(size, GFP_ATOMIC);
c4bf05d3 SW	156	if (!orig_node->bcast_own)
	157	goto free_orig_node;
	158
208e13e4	159	size = bat_priv->num_ifaces * sizeof(uint8_t);
abad5446	160	orig_node->bcast_own_sum = kzalloc(size, GFP_ATOMIC);
e63760e5 AL	161
	162	INIT_LIST_HEAD(&orig_node->frag_list);
	163	orig_node->last_frag_packet = 0;
	164
c4bf05d3 SW	165	if (!orig_node->bcast_own_sum)
	166	goto free_bcast_own;
	167
8c70f138	168	if (hash_add(bat_priv->orig_hash, orig_node) < 0)
c4bf05d3	169	goto free_bcast_own_sum;
8a2e042c	170
8c70f138 ML	171	if (bat_priv->orig_hash->elements * 4 > bat_priv->orig_hash->size) {
	172	swaphash = hash_resize(bat_priv->orig_hash,
	173	bat_priv->orig_hash->size * 2);
8a2e042c	174
8c70f138	175	if (!swaphash)
6a0e9fa8	176	bat_dbg(DBG_BATMAN, bat_priv,
c1641862	177	"Couldn't resize orig hash table\n");
8a2e042c	178	else
8c70f138	179	bat_priv->orig_hash = swaphash;
8a2e042c AL	180	}
	181
	182	return orig_node;
c4bf05d3 SW	183	free_bcast_own_sum:
	184	kfree(orig_node->bcast_own_sum);
	185	free_bcast_own:
	186	kfree(orig_node->bcast_own);
	187	free_orig_node:
	188	kfree(orig_node);
	189	return NULL;
8a2e042c AL	190	}
8a2e042c AL	191
6a0e9fa8 ML	192	static bool purge_orig_neighbors(struct bat_priv *bat_priv,
6a0e9fa8 ML	193	struct orig_node *orig_node,
8a2e042c AL	194	struct neigh_node **best_neigh_node)
	195	{
	196	struct list_head list_pos, list_pos_tmp;
8a2e042c AL	197	struct neigh_node *neigh_node;
	198	bool neigh_purged = false;
	199
	200	*best_neigh_node = NULL;
	201
5ea84fa3	202	/* for all neighbors towards this originator ... */
8a2e042c AL	203	list_for_each_safe(list_pos, list_pos_tmp, &orig_node->neigh_list) {
	204	neigh_node = list_entry(list_pos, struct neigh_node, list);
	205
208e13e4	206	if ((time_after(jiffies,
b6be4535	207	neigh_node->last_valid + PURGE_TIMEOUT * HZ)) \|\|
8c70f138 ML	208	(neigh_node->if_incoming->if_status == IF_INACTIVE) \|\|
8c70f138 ML	209	(neigh_node->if_incoming->if_status == IF_TO_BE_REMOVED)) {
208e13e4 ML	210
	211	if (neigh_node->if_incoming->if_status ==
	212	IF_TO_BE_REMOVED)
84ec0864	213	bat_dbg(DBG_BATMAN, bat_priv,
6d45d8df SE	214	"neighbor purge: originator %pM, "
6d45d8df SE	215	"neighbor: %pM, iface: %s\n",
208e13e4	216	orig_node->orig, neigh_node->addr,
57b7117a	217	neigh_node->if_incoming->net_dev->name);
208e13e4	218	else
84ec0864	219	bat_dbg(DBG_BATMAN, bat_priv,
6d45d8df SE	220	"neighbor timeout: originator %pM, "
6d45d8df SE	221	"neighbor: %pM, last_valid: %lu\n",
208e13e4 ML	222	orig_node->orig, neigh_node->addr,
208e13e4 ML	223	(neigh_node->last_valid / HZ));
8a2e042c AL	224
	225	neigh_purged = true;
	226	list_del(list_pos);
	227	kfree(neigh_node);
	228	} else {
	229	if ((*best_neigh_node == NULL) \|\|
	230	(neigh_node->tq_avg > (*best_neigh_node)->tq_avg))
	231	*best_neigh_node = neigh_node;
	232	}
	233	}
	234	return neigh_purged;
	235	}
	236
6a0e9fa8 ML	237	static bool purge_orig_node(struct bat_priv *bat_priv,
6a0e9fa8 ML	238	struct orig_node *orig_node)
8a2e042c AL	239	{
8a2e042c AL	240	struct neigh_node *best_neigh_node;
8a2e042c AL	241
8a2e042c AL	242	if (time_after(jiffies,
b6be4535	243	orig_node->last_valid + 2 * PURGE_TIMEOUT * HZ)) {
8a2e042c	244
84ec0864	245	bat_dbg(DBG_BATMAN, bat_priv,
b9b27e4e AL	246	"Originator timeout: originator %pM, last_valid %lu\n",
b9b27e4e AL	247	orig_node->orig, (orig_node->last_valid / HZ));
8a2e042c AL	248	return true;
8a2e042c AL	249	} else {
6a0e9fa8 ML	250	if (purge_orig_neighbors(bat_priv, orig_node,
	251	&best_neigh_node)) {
	252	update_routes(bat_priv, orig_node,
	253	best_neigh_node,
8a2e042c AL	254	orig_node->hna_buff,
8a2e042c AL	255	orig_node->hna_buff_len);
e35fd5ec SW	256	/* update bonding candidates, we could have lost
	257	* some candidates. */
	258	update_bonding_candidates(bat_priv, orig_node);
	259	}
8a2e042c	260	}
14741240	261
8a2e042c AL	262	return false;
	263	}
	264
8c70f138	265	static void _purge_orig(struct bat_priv *bat_priv)
8a2e042c	266	{
b6c35976	267	HASHIT(hashit);
8a2e042c	268	struct orig_node *orig_node;
e7017195	269	unsigned long flags;
8a2e042c	270
8c70f138	271	spin_lock_irqsave(&bat_priv->orig_hash_lock, flags);
8a2e042c AL	272
8a2e042c AL	273	/* for all origins... */
8c70f138	274	while (hash_iterate(bat_priv->orig_hash, &hashit)) {
b6c35976	275	orig_node = hashit.bucket->data;
6a0e9fa8	276
8c70f138 ML	277	if (purge_orig_node(bat_priv, orig_node)) {
	278	hash_remove_bucket(bat_priv->orig_hash, &hashit);
	279	free_orig_node(orig_node, bat_priv);
	280	}
e63760e5 AL	281
e63760e5 AL	282	if (time_after(jiffies, (orig_node->last_frag_packet +
6a0e9fa8	283	msecs_to_jiffies(FRAG_TIMEOUT))))
e63760e5	284	frag_list_free(&orig_node->frag_list);
8a2e042c AL	285	}
8a2e042c AL	286
8c70f138 ML	287	spin_unlock_irqrestore(&bat_priv->orig_hash_lock, flags);
	288
	289	}
	290
	291	static void purge_orig(struct work_struct *work)
	292	{
	293	struct delayed_work *delayed_work =
	294	container_of(work, struct delayed_work, work);
	295	struct bat_priv *bat_priv =
	296	container_of(delayed_work, struct bat_priv, orig_work);
	297
	298	_purge_orig(bat_priv);
	299	start_purge_timer(bat_priv);
	300	}
8a2e042c	301
8c70f138 ML	302	void purge_orig_ref(struct bat_priv *bat_priv)
	303	{
	304	_purge_orig(bat_priv);
8a2e042c AL	305	}
8a2e042c AL	306
4caecbc0	307	int orig_seq_print_text(struct seq_file seq, void offset)
47fdf097 ML	308	{
47fdf097 ML	309	HASHIT(hashit);
4caecbc0	310	struct net_device net_dev = (struct net_device )seq->private;
208e13e4	311	struct bat_priv *bat_priv = netdev_priv(net_dev);
47fdf097 ML	312	struct orig_node *orig_node;
47fdf097 ML	313	struct neigh_node *neigh_node;
4caecbc0	314	int batman_count = 0;
80f6c34b LL	315	int last_seen_secs;
80f6c34b LL	316	int last_seen_msecs;
47fdf097 ML	317	unsigned long flags;
	318	char orig_str[ETH_STR_LEN], router_str[ETH_STR_LEN];
	319
4caecbc0 SE	320	if ((!bat_priv->primary_if) \|\|
	321	(bat_priv->primary_if->if_status != IF_ACTIVE)) {
	322	if (!bat_priv->primary_if)
	323	return seq_printf(seq, "BATMAN mesh %s disabled - "
6d45d8df SE	324	"please specify interfaces to enable it\n",
6d45d8df SE	325	net_dev->name);
14741240	326
4caecbc0 SE	327	return seq_printf(seq, "BATMAN mesh %s "
	328	"disabled - primary interface not active\n",
	329	net_dev->name);
14741240 ML	330	}
14741240 ML	331
80f6c34b LL	332	seq_printf(seq, "[B.A.T.M.A.N. adv %s%s, MainIF/MAC: %s/%s (%s)]\n",
80f6c34b LL	333	SOURCE_VERSION, REVISION_VERSION_STR,
57b7117a SE	334	bat_priv->primary_if->net_dev->name,
57b7117a SE	335	bat_priv->primary_if->addr_str, net_dev->name);
80f6c34b LL	336	seq_printf(seq, " %-15s %s (%s/%i) %17s [%10s]: %20s ...\n",
	337	"Originator", "last-seen", "#", TQ_MAX_VALUE, "Nexthop",
	338	"outgoingIF", "Potential nexthops");
47fdf097	339
8c70f138	340	spin_lock_irqsave(&bat_priv->orig_hash_lock, flags);
47fdf097	341
8c70f138	342	while (hash_iterate(bat_priv->orig_hash, &hashit)) {
47fdf097 ML	343
	344	orig_node = hashit.bucket->data;
	345
	346	if (!orig_node->router)
	347	continue;
	348
	349	if (orig_node->router->tq_avg == 0)
	350	continue;
	351
47fdf097 ML	352	addr_to_string(orig_str, orig_node->orig);
47fdf097 ML	353	addr_to_string(router_str, orig_node->router->addr);
80f6c34b LL	354	last_seen_secs = jiffies_to_msecs(jiffies -
	355	orig_node->last_valid) / 1000;
	356	last_seen_msecs = jiffies_to_msecs(jiffies -
	357	orig_node->last_valid) % 1000;
	358
	359	seq_printf(seq, "%-17s %4i.%03is (%3i) %17s [%10s]:",
	360	orig_str, last_seen_secs, last_seen_msecs,
	361	orig_node->router->tq_avg, router_str,
57b7117a	362	orig_node->router->if_incoming->net_dev->name);
47fdf097 ML	363
	364	list_for_each_entry(neigh_node, &orig_node->neigh_list, list) {
	365	addr_to_string(orig_str, neigh_node->addr);
4caecbc0	366	seq_printf(seq, " %17s (%3i)", orig_str,
47fdf097 ML	367	neigh_node->tq_avg);
	368	}
	369
4caecbc0	370	seq_printf(seq, "\n");
47fdf097	371	batman_count++;
47fdf097 ML	372	}
47fdf097 ML	373
8c70f138	374	spin_unlock_irqrestore(&bat_priv->orig_hash_lock, flags);
47fdf097	375
4caecbc0 SE	376	if ((batman_count == 0))
4caecbc0 SE	377	seq_printf(seq, "No batman nodes in range ...\n");
47fdf097	378
4caecbc0	379	return 0;
47fdf097	380	}
8a2e042c	381
208e13e4 ML	382	static int orig_node_add_if(struct orig_node *orig_node, int max_if_num)
	383	{
	384	void *data_ptr;
	385
	386	data_ptr = kmalloc(max_if_num * sizeof(TYPE_OF_WORD) * NUM_WORDS,
	387	GFP_ATOMIC);
	388	if (!data_ptr) {
c1641862	389	pr_err("Can't resize orig: out of memory\n");
208e13e4 ML	390	return -1;
	391	}
	392
	393	memcpy(data_ptr, orig_node->bcast_own,
	394	(max_if_num - 1) * sizeof(TYPE_OF_WORD) * NUM_WORDS);
	395	kfree(orig_node->bcast_own);
	396	orig_node->bcast_own = data_ptr;
	397
	398	data_ptr = kmalloc(max_if_num * sizeof(uint8_t), GFP_ATOMIC);
	399	if (!data_ptr) {
c1641862	400	pr_err("Can't resize orig: out of memory\n");
208e13e4 ML	401	return -1;
	402	}
	403
	404	memcpy(data_ptr, orig_node->bcast_own_sum,
	405	(max_if_num - 1) * sizeof(uint8_t));
	406	kfree(orig_node->bcast_own_sum);
	407	orig_node->bcast_own_sum = data_ptr;
	408
	409	return 0;
	410	}
	411
	412	int orig_hash_add_if(struct batman_if *batman_if, int max_if_num)
	413	{
8c70f138	414	struct bat_priv *bat_priv = netdev_priv(batman_if->soft_iface);
208e13e4	415	struct orig_node *orig_node;
9abc1023	416	unsigned long flags;
208e13e4 ML	417	HASHIT(hashit);
	418
	419	/* resize all orig nodes because orig_node->bcast_own(_sum) depend on
	420	* if_num */
8c70f138	421	spin_lock_irqsave(&bat_priv->orig_hash_lock, flags);
208e13e4	422
8c70f138	423	while (hash_iterate(bat_priv->orig_hash, &hashit)) {
208e13e4 ML	424	orig_node = hashit.bucket->data;
	425
	426	if (orig_node_add_if(orig_node, max_if_num) == -1)
	427	goto err;
	428	}
	429
8c70f138	430	spin_unlock_irqrestore(&bat_priv->orig_hash_lock, flags);
208e13e4 ML	431	return 0;
	432
	433	err:
8c70f138	434	spin_unlock_irqrestore(&bat_priv->orig_hash_lock, flags);
208e13e4 ML	435	return -ENOMEM;
	436	}
	437
	438	static int orig_node_del_if(struct orig_node *orig_node,
	439	int max_if_num, int del_if_num)
	440	{
	441	void *data_ptr = NULL;
	442	int chunk_size;
	443
	444	/* last interface was removed */
	445	if (max_if_num == 0)
	446	goto free_bcast_own;
	447
	448	chunk_size = sizeof(TYPE_OF_WORD) * NUM_WORDS;
	449	data_ptr = kmalloc(max_if_num * chunk_size, GFP_ATOMIC);
	450	if (!data_ptr) {
c1641862	451	pr_err("Can't resize orig: out of memory\n");
208e13e4 ML	452	return -1;
	453	}
	454
	455	/* copy first part */
	456	memcpy(data_ptr, orig_node->bcast_own, del_if_num * chunk_size);
	457
	458	/* copy second part */
5dfa2ba9	459	memcpy(data_ptr + del_if_num * chunk_size,
208e13e4 ML	460	orig_node->bcast_own + ((del_if_num + 1) * chunk_size),
	461	(max_if_num - del_if_num) * chunk_size);
	462
	463	free_bcast_own:
	464	kfree(orig_node->bcast_own);
	465	orig_node->bcast_own = data_ptr;
	466
	467	if (max_if_num == 0)
	468	goto free_own_sum;
	469
	470	data_ptr = kmalloc(max_if_num * sizeof(uint8_t), GFP_ATOMIC);
	471	if (!data_ptr) {
c1641862	472	pr_err("Can't resize orig: out of memory\n");
208e13e4 ML	473	return -1;
	474	}
	475
	476	memcpy(data_ptr, orig_node->bcast_own_sum,
	477	del_if_num * sizeof(uint8_t));
	478
5dfa2ba9	479	memcpy(data_ptr + del_if_num * sizeof(uint8_t),
208e13e4 ML	480	orig_node->bcast_own_sum + ((del_if_num + 1) * sizeof(uint8_t)),
	481	(max_if_num - del_if_num) * sizeof(uint8_t));
	482
	483	free_own_sum:
	484	kfree(orig_node->bcast_own_sum);
	485	orig_node->bcast_own_sum = data_ptr;
	486
	487	return 0;
	488	}
	489
	490	int orig_hash_del_if(struct batman_if *batman_if, int max_if_num)
	491	{
8c70f138	492	struct bat_priv *bat_priv = netdev_priv(batman_if->soft_iface);
208e13e4 ML	493	struct batman_if *batman_if_tmp;
208e13e4 ML	494	struct orig_node *orig_node;
9abc1023	495	unsigned long flags;
208e13e4 ML	496	HASHIT(hashit);
	497	int ret;
	498
	499	/* resize all orig nodes because orig_node->bcast_own(_sum) depend on
	500	* if_num */
8c70f138	501	spin_lock_irqsave(&bat_priv->orig_hash_lock, flags);
208e13e4	502
8c70f138	503	while (hash_iterate(bat_priv->orig_hash, &hashit)) {
208e13e4 ML	504	orig_node = hashit.bucket->data;
	505
	506	ret = orig_node_del_if(orig_node, max_if_num,
	507	batman_if->if_num);
	508
	509	if (ret == -1)
	510	goto err;
	511	}
	512
	513	/* renumber remaining batman interfaces _inside_ of orig_hash_lock */
	514	rcu_read_lock();
	515	list_for_each_entry_rcu(batman_if_tmp, &if_list, list) {
	516	if (batman_if_tmp->if_status == IF_NOT_IN_USE)
	517	continue;
	518
	519	if (batman_if == batman_if_tmp)
	520	continue;
	521
8c70f138 ML	522	if (batman_if->soft_iface != batman_if_tmp->soft_iface)
	523	continue;
	524
208e13e4 ML	525	if (batman_if_tmp->if_num > batman_if->if_num)
	526	batman_if_tmp->if_num--;
	527	}
	528	rcu_read_unlock();
	529
	530	batman_if->if_num = -1;
8c70f138	531	spin_unlock_irqrestore(&bat_priv->orig_hash_lock, flags);
208e13e4 ML	532	return 0;
	533
	534	err:
8c70f138	535	spin_unlock_irqrestore(&bat_priv->orig_hash_lock, flags);
208e13e4 ML	536	return -ENOMEM;
208e13e4 ML	537	}