[net-next-2.6.git] / drivers / staging / batman-adv / translation-table.c

/*
 * Copyright (C) 2007-2010 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
 *
 */

#include "main.h"
#include "translation-table.h"
#include "soft-interface.h"
#include "types.h"
#include "hash.h"

struct hashtable_t *hna_local_hash;
static struct hashtable_t *hna_global_hash;
atomic_t hna_local_changed;

DEFINE_SPINLOCK(hna_local_hash_lock);
static DEFINE_SPINLOCK(hna_global_hash_lock);

static DECLARE_DELAYED_WORK(hna_local_purge_wq, hna_local_purge);

static void hna_local_start_timer(void)
{
	queue_delayed_work(bat_event_workqueue, &hna_local_purge_wq, 10 * HZ);
}

int hna_local_init(void)
{
	if (hna_local_hash)
		return 1;

	hna_local_hash = hash_new(128, compare_orig, choose_orig);

	if (!hna_local_hash)
		return 0;

	atomic_set(&hna_local_changed, 0);
	hna_local_start_timer();

	return 1;
}

void hna_local_add(uint8_t *addr)
{
	struct hna_local_entry *hna_local_entry;
	struct hna_global_entry *hna_global_entry;
	struct hashtable_t *swaphash;
	unsigned long flags;

	spin_lock_irqsave(&hna_local_hash_lock, flags);
	hna_local_entry =
		((struct hna_local_entry *)hash_find(hna_local_hash, addr));
	spin_unlock_irqrestore(&hna_local_hash_lock, flags);

	if (hna_local_entry != NULL) {
		hna_local_entry->last_seen = jiffies;
		return;
	}

	/* only announce as many hosts as possible in the batman-packet and
	   space in batman_packet->num_hna That also should give a limit to
	   MAC-flooding. */
	if ((num_hna + 1 > (ETH_DATA_LEN - BAT_PACKET_LEN) / ETH_ALEN) ||
	    (num_hna + 1 > 255)) {
		bat_dbg(DBG_ROUTES,
			"Can't add new local hna entry (%pM): "
			"number of local hna entries exceeds packet size\n",
			addr);
		return;
	}

	bat_dbg(DBG_ROUTES, "Creating new local hna entry: %pM\n",
		addr);

	hna_local_entry = kmalloc(sizeof(struct hna_local_entry), GFP_ATOMIC);
	if (!hna_local_entry)
		return;

	memcpy(hna_local_entry->addr, addr, ETH_ALEN);
	hna_local_entry->last_seen = jiffies;

	/* the batman interface mac address should never be purged */
	if (compare_orig(addr, soft_device->dev_addr))
		hna_local_entry->never_purge = 1;
	else
		hna_local_entry->never_purge = 0;

	spin_lock_irqsave(&hna_local_hash_lock, flags);

	hash_add(hna_local_hash, hna_local_entry);
	num_hna++;
	atomic_set(&hna_local_changed, 1);

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

		if (swaphash == NULL)
			printk(KERN_ERR "batman-adv:"
			       "Couldn't resize local hna hash table\n");
		else
			hna_local_hash = swaphash;
	}

	spin_unlock_irqrestore(&hna_local_hash_lock, flags);

	/* remove address from global hash if present */
	spin_lock_irqsave(&hna_global_hash_lock, flags);

	hna_global_entry =
		((struct hna_global_entry *)hash_find(hna_global_hash, addr));

	if (hna_global_entry != NULL)
		_hna_global_del_orig(hna_global_entry, "local hna received");

	spin_unlock_irqrestore(&hna_global_hash_lock, flags);
}

int hna_local_fill_buffer(unsigned char *buff, int buff_len)
{
	struct hna_local_entry *hna_local_entry;
	HASHIT(hashit);
	int i = 0;
	unsigned long flags;

	spin_lock_irqsave(&hna_local_hash_lock, flags);

	while (hash_iterate(hna_local_hash, &hashit)) {

		if (buff_len < (i + 1) * ETH_ALEN)
			break;

		hna_local_entry = hashit.bucket->data;
		memcpy(buff + (i * ETH_ALEN), hna_local_entry->addr, ETH_ALEN);

		i++;
	}

	/* if we did not get all new local hnas see you next time  ;-) */
	if (i == num_hna)
		atomic_set(&hna_local_changed, 0);

	spin_unlock_irqrestore(&hna_local_hash_lock, flags);

	return i;
}

int hna_local_seq_print_text(struct seq_file *seq, void *offset)
{
	struct net_device *net_dev = (struct net_device *)seq->private;
	struct bat_priv *bat_priv = netdev_priv(net_dev);
	struct hna_local_entry *hna_local_entry;
	HASHIT(hashit);
	HASHIT(hashit_count);
	unsigned long flags;
	size_t buf_size, pos;
	char *buff;

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

	seq_printf(seq, "Locally retrieved addresses (from %s) "
		   "announced via HNA:\n",
		   net_dev->name);

	spin_lock_irqsave(&hna_local_hash_lock, flags);

	buf_size = 1;
	/* Estimate length for: " * xx:xx:xx:xx:xx:xx\n" */
	while (hash_iterate(hna_local_hash, &hashit_count))
		buf_size += 21;

	buff = kmalloc(buf_size, GFP_ATOMIC);
	if (!buff) {
		spin_unlock_irqrestore(&hna_local_hash_lock, flags);
		return -ENOMEM;
	}
	buff[0] = '\0';
	pos = 0;

	while (hash_iterate(hna_local_hash, &hashit)) {
		hna_local_entry = hashit.bucket->data;

		pos += snprintf(buff + pos, 22, " * %pM\n",
				hna_local_entry->addr);
	}

	spin_unlock_irqrestore(&hna_local_hash_lock, flags);

	seq_printf(seq, "%s", buff);
	kfree(buff);
	return 0;
}

static void _hna_local_del(void *data)
{
	kfree(data);
	num_hna--;
	atomic_set(&hna_local_changed, 1);
}

static void hna_local_del(struct hna_local_entry *hna_local_entry,
			  char *message)
{
	bat_dbg(DBG_ROUTES, "Deleting local hna entry (%pM): %s\n",
		hna_local_entry->addr, message);

	hash_remove(hna_local_hash, hna_local_entry->addr);
	_hna_local_del(hna_local_entry);
}

void hna_local_remove(uint8_t *addr, char *message)
{
	struct hna_local_entry *hna_local_entry;
	unsigned long flags;

	spin_lock_irqsave(&hna_local_hash_lock, flags);

	hna_local_entry = (struct hna_local_entry *)
		hash_find(hna_local_hash, addr);
	if (hna_local_entry)
		hna_local_del(hna_local_entry, message);

	spin_unlock_irqrestore(&hna_local_hash_lock, flags);
}

void hna_local_purge(struct work_struct *work)
{
	struct hna_local_entry *hna_local_entry;
	HASHIT(hashit);
	unsigned long flags;
	unsigned long timeout;

	spin_lock_irqsave(&hna_local_hash_lock, flags);

	while (hash_iterate(hna_local_hash, &hashit)) {
		hna_local_entry = hashit.bucket->data;

		timeout = hna_local_entry->last_seen +
			((LOCAL_HNA_TIMEOUT / 1000) * HZ);
		if ((!hna_local_entry->never_purge) &&
		    time_after(jiffies, timeout))
			hna_local_del(hna_local_entry, "address timed out");
	}

	spin_unlock_irqrestore(&hna_local_hash_lock, flags);
	hna_local_start_timer();
}

void hna_local_free(void)
{
	if (!hna_local_hash)
		return;

	cancel_delayed_work_sync(&hna_local_purge_wq);
	hash_delete(hna_local_hash, _hna_local_del);
	hna_local_hash = NULL;
}

int hna_global_init(void)
{
	if (hna_global_hash)
		return 1;

	hna_global_hash = hash_new(128, compare_orig, choose_orig);

	if (!hna_global_hash)
		return 0;

	return 1;
}

void hna_global_add_orig(struct orig_node *orig_node,
			 unsigned char *hna_buff, int hna_buff_len)
{
	struct hna_global_entry *hna_global_entry;
	struct hna_local_entry *hna_local_entry;
	struct hashtable_t *swaphash;
	int hna_buff_count = 0;
	unsigned long flags;
	unsigned char *hna_ptr;

	while ((hna_buff_count + 1) * ETH_ALEN <= hna_buff_len) {
		spin_lock_irqsave(&hna_global_hash_lock, flags);

		hna_ptr = hna_buff + (hna_buff_count * ETH_ALEN);
		hna_global_entry = (struct hna_global_entry *)
			hash_find(hna_global_hash, hna_ptr);

		if (hna_global_entry == NULL) {
			spin_unlock_irqrestore(&hna_global_hash_lock, flags);

			hna_global_entry =
				kmalloc(sizeof(struct hna_global_entry),
					GFP_ATOMIC);

			if (!hna_global_entry)
				break;

			memcpy(hna_global_entry->addr, hna_ptr, ETH_ALEN);

			bat_dbg(DBG_ROUTES,
				"Creating new global hna entry: "
				"%pM (via %pM)\n",
				hna_global_entry->addr, orig_node->orig);

			spin_lock_irqsave(&hna_global_hash_lock, flags);
			hash_add(hna_global_hash, hna_global_entry);

		}

		hna_global_entry->orig_node = orig_node;
		spin_unlock_irqrestore(&hna_global_hash_lock, flags);

		/* remove address from local hash if present */
		spin_lock_irqsave(&hna_local_hash_lock, flags);

		hna_ptr = hna_buff + (hna_buff_count * ETH_ALEN);
		hna_local_entry = (struct hna_local_entry *)
			hash_find(hna_local_hash, hna_ptr);

		if (hna_local_entry != NULL)
			hna_local_del(hna_local_entry, "global hna received");

		spin_unlock_irqrestore(&hna_local_hash_lock, flags);

		hna_buff_count++;
	}

	/* initialize, and overwrite if malloc succeeds */
	orig_node->hna_buff = NULL;
	orig_node->hna_buff_len = 0;

	if (hna_buff_len > 0) {
		orig_node->hna_buff = kmalloc(hna_buff_len, GFP_ATOMIC);
		if (orig_node->hna_buff) {
			memcpy(orig_node->hna_buff, hna_buff, hna_buff_len);
			orig_node->hna_buff_len = hna_buff_len;
		}
	}

	spin_lock_irqsave(&hna_global_hash_lock, flags);

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

		if (swaphash == NULL)
			printk(KERN_ERR "batman-adv:"
			       "Couldn't resize global hna hash table\n");
		else
			hna_global_hash = swaphash;
	}

	spin_unlock_irqrestore(&hna_global_hash_lock, flags);
}

int hna_global_seq_print_text(struct seq_file *seq, void *offset)
{
	struct net_device *net_dev = (struct net_device *)seq->private;
	struct bat_priv *bat_priv = netdev_priv(net_dev);
	struct hna_global_entry *hna_global_entry;
	HASHIT(hashit);
	HASHIT(hashit_count);
	unsigned long flags;
	size_t buf_size, pos;
	char *buff;

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

	seq_printf(seq, "Globally announced HNAs received via the mesh %s\n",
		   net_dev->name);

	spin_lock_irqsave(&hna_global_hash_lock, flags);

	buf_size = 1;
	/* Estimate length for: " * xx:xx:xx:xx:xx:xx via xx:xx:xx:xx:xx:xx\n"*/
	while (hash_iterate(hna_global_hash, &hashit_count))
		buf_size += 43;

	buff = kmalloc(buf_size, GFP_ATOMIC);
	if (!buff) {
		spin_unlock_irqrestore(&hna_global_hash_lock, flags);
		return -ENOMEM;
	}
	buff[0] = '\0';
	pos = 0;

	while (hash_iterate(hna_global_hash, &hashit)) {
		hna_global_entry = hashit.bucket->data;

		pos += snprintf(buff + pos, 44,
				" * %pM via %pM\n", hna_global_entry->addr,
				hna_global_entry->orig_node->orig);
	}

	spin_unlock_irqrestore(&hna_global_hash_lock, flags);

	seq_printf(seq, "%s", buff);
	kfree(buff);
	return 0;
}

void _hna_global_del_orig(struct hna_global_entry *hna_global_entry,
			  char *message)
{
	bat_dbg(DBG_ROUTES, "Deleting global hna entry %pM (via %pM): %s\n",
		hna_global_entry->addr, hna_global_entry->orig_node->orig,
		message);

	hash_remove(hna_global_hash, hna_global_entry->addr);
	kfree(hna_global_entry);
}

void hna_global_del_orig(struct orig_node *orig_node, char *message)
{
	struct hna_global_entry *hna_global_entry;
	int hna_buff_count = 0;
	unsigned long flags;
	unsigned char *hna_ptr;

	if (orig_node->hna_buff_len == 0)
		return;

	spin_lock_irqsave(&hna_global_hash_lock, flags);

	while ((hna_buff_count + 1) * ETH_ALEN <= orig_node->hna_buff_len) {
		hna_ptr = orig_node->hna_buff + (hna_buff_count * ETH_ALEN);
		hna_global_entry = (struct hna_global_entry *)
			hash_find(hna_global_hash, hna_ptr);

		if ((hna_global_entry != NULL) &&
		    (hna_global_entry->orig_node == orig_node))
			_hna_global_del_orig(hna_global_entry, message);

		hna_buff_count++;
	}

	spin_unlock_irqrestore(&hna_global_hash_lock, flags);

	orig_node->hna_buff_len = 0;
	kfree(orig_node->hna_buff);
	orig_node->hna_buff = NULL;
}

static void hna_global_del(void *data)
{
	kfree(data);
}

void hna_global_free(void)
{
	if (!hna_global_hash)
		return;

	hash_delete(hna_global_hash, hna_global_del);
	hna_global_hash = NULL;
}

struct orig_node *transtable_search(uint8_t *addr)
{
	struct hna_global_entry *hna_global_entry;
	unsigned long flags;

	spin_lock_irqsave(&hna_global_hash_lock, flags);
	hna_global_entry = (struct hna_global_entry *)
		hash_find(hna_global_hash, addr);
	spin_unlock_irqrestore(&hna_global_hash_lock, flags);

	if (hna_global_entry == NULL)
		return NULL;

	return hna_global_entry->orig_node;
}
Commit	Line	Data
5beef3c9	1	/*
9b6d10b7	2	* Copyright (C) 2007-2010 B.A.T.M.A.N. contributors:
5beef3c9 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	#include "main.h"
	23	#include "translation-table.h"
5beef3c9 AL	24	#include "soft-interface.h"
	25	#include "types.h"
	26	#include "hash.h"
5beef3c9 AL	27
	28	struct hashtable_t *hna_local_hash;
	29	static struct hashtable_t *hna_global_hash;
	30	atomic_t hna_local_changed;
	31
	32	DEFINE_SPINLOCK(hna_local_hash_lock);
	33	static DEFINE_SPINLOCK(hna_global_hash_lock);
	34
	35	static DECLARE_DELAYED_WORK(hna_local_purge_wq, hna_local_purge);
	36
	37	static void hna_local_start_timer(void)
	38	{
	39	queue_delayed_work(bat_event_workqueue, &hna_local_purge_wq, 10 * HZ);
	40	}
	41
	42	int hna_local_init(void)
	43	{
	44	if (hna_local_hash)
	45	return 1;
	46
	47	hna_local_hash = hash_new(128, compare_orig, choose_orig);
	48
	49	if (!hna_local_hash)
	50	return 0;
	51
	52	atomic_set(&hna_local_changed, 0);
	53	hna_local_start_timer();
	54
	55	return 1;
	56	}
	57
	58	void hna_local_add(uint8_t *addr)
	59	{
	60	struct hna_local_entry *hna_local_entry;
	61	struct hna_global_entry *hna_global_entry;
	62	struct hashtable_t *swaphash;
5beef3c9 AL	63	unsigned long flags;
	64
	65	spin_lock_irqsave(&hna_local_hash_lock, flags);
	66	hna_local_entry =
	67	((struct hna_local_entry *)hash_find(hna_local_hash, addr));
	68	spin_unlock_irqrestore(&hna_local_hash_lock, flags);
	69
	70	if (hna_local_entry != NULL) {
	71	hna_local_entry->last_seen = jiffies;
	72	return;
	73	}
	74
5beef3c9 AL	75	/* only announce as many hosts as possible in the batman-packet and
	76	space in batman_packet->num_hna That also should give a limit to
	77	MAC-flooding. */
	78	if ((num_hna + 1 > (ETH_DATA_LEN - BAT_PACKET_LEN) / ETH_ALEN) \|\|
	79	(num_hna + 1 > 255)) {
6d45d8df SE	80	bat_dbg(DBG_ROUTES,
	81	"Can't add new local hna entry (%pM): "
	82	"number of local hna entries exceeds packet size\n",
	83	addr);
5beef3c9 AL	84	return;
	85	}
	86
0887635b	87	bat_dbg(DBG_ROUTES, "Creating new local hna entry: %pM\n",
b9b27e4e	88	addr);
5beef3c9 AL	89
	90	hna_local_entry = kmalloc(sizeof(struct hna_local_entry), GFP_ATOMIC);
	91	if (!hna_local_entry)
	92	return;
	93
	94	memcpy(hna_local_entry->addr, addr, ETH_ALEN);
	95	hna_local_entry->last_seen = jiffies;
	96
	97	/* the batman interface mac address should never be purged */
	98	if (compare_orig(addr, soft_device->dev_addr))
	99	hna_local_entry->never_purge = 1;
	100	else
	101	hna_local_entry->never_purge = 0;
	102
	103	spin_lock_irqsave(&hna_local_hash_lock, flags);
	104
	105	hash_add(hna_local_hash, hna_local_entry);
	106	num_hna++;
	107	atomic_set(&hna_local_changed, 1);
	108
	109	if (hna_local_hash->elements * 4 > hna_local_hash->size) {
	110	swaphash = hash_resize(hna_local_hash,
	111	hna_local_hash->size * 2);
	112
	113	if (swaphash == NULL)
6d45d8df SE	114	printk(KERN_ERR "batman-adv:"
6d45d8df SE	115	"Couldn't resize local hna hash table\n");
5beef3c9 AL	116	else
	117	hna_local_hash = swaphash;
	118	}
	119
	120	spin_unlock_irqrestore(&hna_local_hash_lock, flags);
	121
	122	/* remove address from global hash if present */
	123	spin_lock_irqsave(&hna_global_hash_lock, flags);
	124
	125	hna_global_entry =
	126	((struct hna_global_entry *)hash_find(hna_global_hash, addr));
	127
	128	if (hna_global_entry != NULL)
	129	_hna_global_del_orig(hna_global_entry, "local hna received");
	130
	131	spin_unlock_irqrestore(&hna_global_hash_lock, flags);
	132	}
	133
	134	int hna_local_fill_buffer(unsigned char *buff, int buff_len)
	135	{
	136	struct hna_local_entry *hna_local_entry;
b6c35976	137	HASHIT(hashit);
5beef3c9 AL	138	int i = 0;
	139	unsigned long flags;
	140
	141	spin_lock_irqsave(&hna_local_hash_lock, flags);
	142
b6c35976	143	while (hash_iterate(hna_local_hash, &hashit)) {
5beef3c9 AL	144
	145	if (buff_len < (i + 1) * ETH_ALEN)
	146	break;
	147
b6c35976	148	hna_local_entry = hashit.bucket->data;
5beef3c9 AL	149	memcpy(buff + (i * ETH_ALEN), hna_local_entry->addr, ETH_ALEN);
	150
	151	i++;
	152	}
	153
	154	/* if we did not get all new local hnas see you next time ;-) */
	155	if (i == num_hna)
	156	atomic_set(&hna_local_changed, 0);
	157
	158	spin_unlock_irqrestore(&hna_local_hash_lock, flags);
	159
	160	return i;
	161	}
	162
4caecbc0	163	int hna_local_seq_print_text(struct seq_file seq, void offset)
5beef3c9	164	{
4caecbc0	165	struct net_device net_dev = (struct net_device )seq->private;
208e13e4	166	struct bat_priv *bat_priv = netdev_priv(net_dev);
5beef3c9	167	struct hna_local_entry *hna_local_entry;
b6c35976	168	HASHIT(hashit);
4caecbc0	169	HASHIT(hashit_count);
5beef3c9	170	unsigned long flags;
4caecbc0 SE	171	size_t buf_size, pos;
4caecbc0 SE	172	char *buff;
47fdf097	173
208e13e4	174	if (!bat_priv->primary_if) {
4caecbc0 SE	175	return seq_printf(seq, "BATMAN mesh %s disabled - "
	176	"please specify interfaces to enable it\n",
	177	net_dev->name);
14741240	178	}
14741240	179
4caecbc0 SE	180	seq_printf(seq, "Locally retrieved addresses (from %s) "
	181	"announced via HNA:\n",
	182	net_dev->name);
5beef3c9 AL	183
	184	spin_lock_irqsave(&hna_local_hash_lock, flags);
	185
4caecbc0 SE	186	buf_size = 1;
	187	/* Estimate length for: " * xx:xx:xx:xx:xx:xx\n" */
	188	while (hash_iterate(hna_local_hash, &hashit_count))
	189	buf_size += 21;
5beef3c9	190
4caecbc0 SE	191	buff = kmalloc(buf_size, GFP_ATOMIC);
	192	if (!buff) {
	193	spin_unlock_irqrestore(&hna_local_hash_lock, flags);
	194	return -ENOMEM;
	195	}
	196	buff[0] = '\0';
	197	pos = 0;
47fdf097	198
4caecbc0	199	while (hash_iterate(hna_local_hash, &hashit)) {
b6c35976	200	hna_local_entry = hashit.bucket->data;
5beef3c9	201
516c9a77 JP	202	pos += snprintf(buff + pos, 22, " * %pM\n",
516c9a77 JP	203	hna_local_entry->addr);
5beef3c9 AL	204	}
	205
	206	spin_unlock_irqrestore(&hna_local_hash_lock, flags);
4caecbc0 SE	207
	208	seq_printf(seq, "%s", buff);
	209	kfree(buff);
	210	return 0;
5beef3c9 AL	211	}
	212
	213	static void _hna_local_del(void *data)
	214	{
	215	kfree(data);
	216	num_hna--;
	217	atomic_set(&hna_local_changed, 1);
	218	}
	219
	220	static void hna_local_del(struct hna_local_entry *hna_local_entry,
	221	char *message)
	222	{
0887635b	223	bat_dbg(DBG_ROUTES, "Deleting local hna entry (%pM): %s\n",
b9b27e4e	224	hna_local_entry->addr, message);
5beef3c9 AL	225
	226	hash_remove(hna_local_hash, hna_local_entry->addr);
	227	_hna_local_del(hna_local_entry);
	228	}
	229
a9c2910a AL	230	void hna_local_remove(uint8_t addr, char message)
	231	{
	232	struct hna_local_entry *hna_local_entry;
	233	unsigned long flags;
	234
	235	spin_lock_irqsave(&hna_local_hash_lock, flags);
	236
	237	hna_local_entry = (struct hna_local_entry *)
	238	hash_find(hna_local_hash, addr);
	239	if (hna_local_entry)
	240	hna_local_del(hna_local_entry, message);
	241
	242	spin_unlock_irqrestore(&hna_local_hash_lock, flags);
	243	}
	244
5beef3c9 AL	245	void hna_local_purge(struct work_struct *work)
	246	{
	247	struct hna_local_entry *hna_local_entry;
b6c35976	248	HASHIT(hashit);
5beef3c9 AL	249	unsigned long flags;
	250	unsigned long timeout;
	251
	252	spin_lock_irqsave(&hna_local_hash_lock, flags);
	253
b6c35976 SW	254	while (hash_iterate(hna_local_hash, &hashit)) {
b6c35976 SW	255	hna_local_entry = hashit.bucket->data;
5beef3c9 AL	256
	257	timeout = hna_local_entry->last_seen +
	258	((LOCAL_HNA_TIMEOUT / 1000) * HZ);
	259	if ((!hna_local_entry->never_purge) &&
	260	time_after(jiffies, timeout))
	261	hna_local_del(hna_local_entry, "address timed out");
	262	}
	263
	264	spin_unlock_irqrestore(&hna_local_hash_lock, flags);
	265	hna_local_start_timer();
	266	}
	267
	268	void hna_local_free(void)
	269	{
	270	if (!hna_local_hash)
	271	return;
	272
	273	cancel_delayed_work_sync(&hna_local_purge_wq);
	274	hash_delete(hna_local_hash, _hna_local_del);
	275	hna_local_hash = NULL;
	276	}
	277
	278	int hna_global_init(void)
	279	{
	280	if (hna_global_hash)
	281	return 1;
	282
	283	hna_global_hash = hash_new(128, compare_orig, choose_orig);
	284
	285	if (!hna_global_hash)
	286	return 0;
	287
	288	return 1;
	289	}
	290
	291	void hna_global_add_orig(struct orig_node *orig_node,
	292	unsigned char *hna_buff, int hna_buff_len)
	293	{
	294	struct hna_global_entry *hna_global_entry;
	295	struct hna_local_entry *hna_local_entry;
	296	struct hashtable_t *swaphash;
5beef3c9 AL	297	int hna_buff_count = 0;
	298	unsigned long flags;
	299	unsigned char *hna_ptr;
	300
5beef3c9 AL	301	while ((hna_buff_count + 1) * ETH_ALEN <= hna_buff_len) {
	302	spin_lock_irqsave(&hna_global_hash_lock, flags);
	303
	304	hna_ptr = hna_buff + (hna_buff_count * ETH_ALEN);
	305	hna_global_entry = (struct hna_global_entry *)
	306	hash_find(hna_global_hash, hna_ptr);
	307
	308	if (hna_global_entry == NULL) {
	309	spin_unlock_irqrestore(&hna_global_hash_lock, flags);
	310
	311	hna_global_entry =
	312	kmalloc(sizeof(struct hna_global_entry),
	313	GFP_ATOMIC);
	314
	315	if (!hna_global_entry)
	316	break;
	317
	318	memcpy(hna_global_entry->addr, hna_ptr, ETH_ALEN);
	319
bad2239e	320	bat_dbg(DBG_ROUTES,
6d45d8df SE	321	"Creating new global hna entry: "
6d45d8df SE	322	"%pM (via %pM)\n",
b9b27e4e	323	hna_global_entry->addr, orig_node->orig);
5beef3c9 AL	324
	325	spin_lock_irqsave(&hna_global_hash_lock, flags);
	326	hash_add(hna_global_hash, hna_global_entry);
	327
	328	}
	329
	330	hna_global_entry->orig_node = orig_node;
	331	spin_unlock_irqrestore(&hna_global_hash_lock, flags);
	332
	333	/* remove address from local hash if present */
	334	spin_lock_irqsave(&hna_local_hash_lock, flags);
	335
	336	hna_ptr = hna_buff + (hna_buff_count * ETH_ALEN);
	337	hna_local_entry = (struct hna_local_entry *)
	338	hash_find(hna_local_hash, hna_ptr);
	339
	340	if (hna_local_entry != NULL)
	341	hna_local_del(hna_local_entry, "global hna received");
	342
	343	spin_unlock_irqrestore(&hna_local_hash_lock, flags);
	344
	345	hna_buff_count++;
	346	}
	347
c4bf05d3 SW	348	/* initialize, and overwrite if malloc succeeds */
	349	orig_node->hna_buff = NULL;
	350	orig_node->hna_buff_len = 0;
	351
	352	if (hna_buff_len > 0) {
	353	orig_node->hna_buff = kmalloc(hna_buff_len, GFP_ATOMIC);
	354	if (orig_node->hna_buff) {
	355	memcpy(orig_node->hna_buff, hna_buff, hna_buff_len);
	356	orig_node->hna_buff_len = hna_buff_len;
	357	}
5beef3c9 AL	358	}
	359
	360	spin_lock_irqsave(&hna_global_hash_lock, flags);
	361
	362	if (hna_global_hash->elements * 4 > hna_global_hash->size) {
	363	swaphash = hash_resize(hna_global_hash,
	364	hna_global_hash->size * 2);
	365
	366	if (swaphash == NULL)
6d45d8df SE	367	printk(KERN_ERR "batman-adv:"
6d45d8df SE	368	"Couldn't resize global hna hash table\n");
5beef3c9 AL	369	else
	370	hna_global_hash = swaphash;
	371	}
	372
	373	spin_unlock_irqrestore(&hna_global_hash_lock, flags);
	374	}
	375
4caecbc0	376	int hna_global_seq_print_text(struct seq_file seq, void offset)
5beef3c9	377	{
4caecbc0	378	struct net_device net_dev = (struct net_device )seq->private;
208e13e4	379	struct bat_priv *bat_priv = netdev_priv(net_dev);
5beef3c9	380	struct hna_global_entry *hna_global_entry;
b6c35976	381	HASHIT(hashit);
4caecbc0	382	HASHIT(hashit_count);
5beef3c9	383	unsigned long flags;
4caecbc0 SE	384	size_t buf_size, pos;
4caecbc0 SE	385	char *buff;
47fdf097	386
208e13e4	387	if (!bat_priv->primary_if) {
4caecbc0 SE	388	return seq_printf(seq, "BATMAN mesh %s disabled - "
	389	"please specify interfaces to enable it\n",
	390	net_dev->name);
14741240	391	}
14741240	392
1bcb164e	393	seq_printf(seq, "Globally announced HNAs received via the mesh %s\n",
4caecbc0	394	net_dev->name);
5beef3c9 AL	395
	396	spin_lock_irqsave(&hna_global_hash_lock, flags);
	397
4caecbc0 SE	398	buf_size = 1;
	399	/* Estimate length for: " * xx:xx:xx:xx:xx:xx via xx:xx:xx:xx:xx:xx\n"*/
	400	while (hash_iterate(hna_global_hash, &hashit_count))
	401	buf_size += 43;
5beef3c9	402
4caecbc0 SE	403	buff = kmalloc(buf_size, GFP_ATOMIC);
	404	if (!buff) {
	405	spin_unlock_irqrestore(&hna_global_hash_lock, flags);
	406	return -ENOMEM;
	407	}
	408	buff[0] = '\0';
	409	pos = 0;
47fdf097	410
4caecbc0	411	while (hash_iterate(hna_global_hash, &hashit)) {
b6c35976	412	hna_global_entry = hashit.bucket->data;
5beef3c9	413
4caecbc0	414	pos += snprintf(buff + pos, 44,
516c9a77 JP	415	" * %pM via %pM\n", hna_global_entry->addr,
516c9a77 JP	416	hna_global_entry->orig_node->orig);
5beef3c9 AL	417	}
	418
	419	spin_unlock_irqrestore(&hna_global_hash_lock, flags);
4caecbc0 SE	420
	421	seq_printf(seq, "%s", buff);
	422	kfree(buff);
	423	return 0;
5beef3c9 AL	424	}
	425
	426	void _hna_global_del_orig(struct hna_global_entry *hna_global_entry,
	427	char *message)
	428	{
0887635b	429	bat_dbg(DBG_ROUTES, "Deleting global hna entry %pM (via %pM): %s\n",
b9b27e4e AL	430	hna_global_entry->addr, hna_global_entry->orig_node->orig,
b9b27e4e AL	431	message);
5beef3c9 AL	432
	433	hash_remove(hna_global_hash, hna_global_entry->addr);
	434	kfree(hna_global_entry);
	435	}
	436
	437	void hna_global_del_orig(struct orig_node orig_node, char message)
	438	{
	439	struct hna_global_entry *hna_global_entry;
	440	int hna_buff_count = 0;
	441	unsigned long flags;
	442	unsigned char *hna_ptr;
	443
	444	if (orig_node->hna_buff_len == 0)
	445	return;
	446
	447	spin_lock_irqsave(&hna_global_hash_lock, flags);
	448
	449	while ((hna_buff_count + 1) * ETH_ALEN <= orig_node->hna_buff_len) {
	450	hna_ptr = orig_node->hna_buff + (hna_buff_count * ETH_ALEN);
	451	hna_global_entry = (struct hna_global_entry *)
	452	hash_find(hna_global_hash, hna_ptr);
	453
	454	if ((hna_global_entry != NULL) &&
	455	(hna_global_entry->orig_node == orig_node))
	456	_hna_global_del_orig(hna_global_entry, message);
	457
	458	hna_buff_count++;
	459	}
	460
	461	spin_unlock_irqrestore(&hna_global_hash_lock, flags);
	462
	463	orig_node->hna_buff_len = 0;
	464	kfree(orig_node->hna_buff);
	465	orig_node->hna_buff = NULL;
	466	}
	467
	468	static void hna_global_del(void *data)
	469	{
	470	kfree(data);
	471	}
	472
	473	void hna_global_free(void)
	474	{
	475	if (!hna_global_hash)
	476	return;
	477
	478	hash_delete(hna_global_hash, hna_global_del);
	479	hna_global_hash = NULL;
	480	}
	481
	482	struct orig_node transtable_search(uint8_t addr)
	483	{
	484	struct hna_global_entry *hna_global_entry;
	485	unsigned long flags;
	486
	487	spin_lock_irqsave(&hna_global_hash_lock, flags);
	488	hna_global_entry = (struct hna_global_entry *)
	489	hash_find(hna_global_hash, addr);
	490	spin_unlock_irqrestore(&hna_global_hash_lock, flags);
	491
	492	if (hna_global_entry == NULL)
	493	return NULL;
	494
	495	return hna_global_entry->orig_node;
496	}