[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_fill_buffer_text(struct net_device *net_dev, char *buff,
			       size_t count, loff_t off)
{
	struct bat_priv *bat_priv = netdev_priv(net_dev);
	struct hna_local_entry *hna_local_entry;
	HASHIT(hashit);
	int bytes_written = 0;
	unsigned long flags;
	size_t hdr_len;

	if (!bat_priv->primary_if) {
		if (off == 0)
			return sprintf(buff,
				     "BATMAN mesh %s disabled - "
				     "please specify interfaces to enable it\n",
				     net_dev->name);

		return 0;
	}

	hdr_len = sprintf(buff,
			  "Locally retrieved addresses (from %s) "
			  "announced via HNA:\n",
			  net_dev->name);

	if (off < hdr_len)
		bytes_written = hdr_len;

	spin_lock_irqsave(&hna_local_hash_lock, flags);

	while (hash_iterate(hna_local_hash, &hashit)) {
		hdr_len += 21;

		if (count < bytes_written + 22)
			break;

		if (off >= hdr_len)
			continue;

		hna_local_entry = hashit.bucket->data;

		bytes_written += snprintf(buff + bytes_written, 22,
					  " * " MAC_FMT "\n",
					  hna_local_entry->addr[0],
					  hna_local_entry->addr[1],
					  hna_local_entry->addr[2],
					  hna_local_entry->addr[3],
					  hna_local_entry->addr[4],
					  hna_local_entry->addr[5]);
	}

	spin_unlock_irqrestore(&hna_local_hash_lock, flags);
	return bytes_written;
}

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_fill_buffer_text(struct net_device *net_dev, char *buff,
				size_t count, loff_t off)
{
	struct bat_priv *bat_priv = netdev_priv(net_dev);
	struct hna_global_entry *hna_global_entry;
	HASHIT(hashit);
	int bytes_written = 0;
	unsigned long flags;
	size_t hdr_len;

	if (!bat_priv->primary_if) {
		if (off == 0)
			return sprintf(buff,
				     "BATMAN mesh %s disabled - "
				     "please specify interfaces to enable it\n",
				     net_dev->name);

		return 0;
	}

	hdr_len = sprintf(buff,
			  "Globally announced HNAs received via the mesh %s "
			  "(translation table):\n",
			  net_dev->name);

	if (off < hdr_len)
		bytes_written = hdr_len;

	spin_lock_irqsave(&hna_global_hash_lock, flags);

	while (hash_iterate(hna_global_hash, &hashit)) {
		hdr_len += 43;

		if (count < bytes_written + 44)
			break;

		if (off >= hdr_len)
			continue;

		hna_global_entry = hashit.bucket->data;

		bytes_written += snprintf(buff + bytes_written, 44,
					  " * " MAC_FMT " via " MAC_FMT "\n",
					  hna_global_entry->addr[0],
					  hna_global_entry->addr[1],
					  hna_global_entry->addr[2],
					  hna_global_entry->addr[3],
					  hna_global_entry->addr[4],
					  hna_global_entry->addr[5],
					  hna_global_entry->orig_node->orig[0],
					  hna_global_entry->orig_node->orig[1],
					  hna_global_entry->orig_node->orig[2],
					  hna_global_entry->orig_node->orig[3],
					  hna_global_entry->orig_node->orig[4],
					  hna_global_entry->orig_node->orig[5]);
	}

	spin_unlock_irqrestore(&hna_global_hash_lock, flags);
	return bytes_written;
}

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
47fdf097 ML	163	int hna_local_fill_buffer_text(struct net_device net_dev, char buff,
47fdf097 ML	164	size_t count, loff_t off)
5beef3c9	165	{
208e13e4	166	struct bat_priv *bat_priv = netdev_priv(net_dev);
5beef3c9	167	struct hna_local_entry *hna_local_entry;
b6c35976	168	HASHIT(hashit);
5beef3c9 AL	169	int bytes_written = 0;
5beef3c9 AL	170	unsigned long flags;
47fdf097 ML	171	size_t hdr_len;
47fdf097 ML	172
208e13e4	173	if (!bat_priv->primary_if) {
14741240 ML	174	if (off == 0)
14741240 ML	175	return sprintf(buff,
6d45d8df SE	176	"BATMAN mesh %s disabled - "
	177	"please specify interfaces to enable it\n",
	178	net_dev->name);
14741240 ML	179
	180	return 0;
	181	}
14741240	182
47fdf097	183	hdr_len = sprintf(buff,
6d45d8df SE	184	"Locally retrieved addresses (from %s) "
6d45d8df SE	185	"announced via HNA:\n",
47fdf097 ML	186	net_dev->name);
	187
	188	if (off < hdr_len)
	189	bytes_written = hdr_len;
5beef3c9 AL	190
	191	spin_lock_irqsave(&hna_local_hash_lock, flags);
	192
b6c35976	193	while (hash_iterate(hna_local_hash, &hashit)) {
47fdf097	194	hdr_len += 21;
5beef3c9	195
47fdf097	196	if (count < bytes_written + 22)
5beef3c9 AL	197	break;
5beef3c9 AL	198
47fdf097 ML	199	if (off >= hdr_len)
	200	continue;
	201
b6c35976	202	hna_local_entry = hashit.bucket->data;
5beef3c9	203
47fdf097	204	bytes_written += snprintf(buff + bytes_written, 22,
6d45d8df	205	" * " MAC_FMT "\n",
5beef3c9 AL	206	hna_local_entry->addr[0],
	207	hna_local_entry->addr[1],
	208	hna_local_entry->addr[2],
	209	hna_local_entry->addr[3],
	210	hna_local_entry->addr[4],
	211	hna_local_entry->addr[5]);
	212	}
	213
	214	spin_unlock_irqrestore(&hna_local_hash_lock, flags);
5beef3c9 AL	215	return bytes_written;
	216	}
	217
	218	static void _hna_local_del(void *data)
	219	{
	220	kfree(data);
	221	num_hna--;
	222	atomic_set(&hna_local_changed, 1);
	223	}
	224
	225	static void hna_local_del(struct hna_local_entry *hna_local_entry,
	226	char *message)
	227	{
0887635b	228	bat_dbg(DBG_ROUTES, "Deleting local hna entry (%pM): %s\n",
b9b27e4e	229	hna_local_entry->addr, message);
5beef3c9 AL	230
	231	hash_remove(hna_local_hash, hna_local_entry->addr);
	232	_hna_local_del(hna_local_entry);
	233	}
	234
a9c2910a AL	235	void hna_local_remove(uint8_t addr, char message)
	236	{
	237	struct hna_local_entry *hna_local_entry;
	238	unsigned long flags;
	239
	240	spin_lock_irqsave(&hna_local_hash_lock, flags);
	241
	242	hna_local_entry = (struct hna_local_entry *)
	243	hash_find(hna_local_hash, addr);
	244	if (hna_local_entry)
	245	hna_local_del(hna_local_entry, message);
	246
	247	spin_unlock_irqrestore(&hna_local_hash_lock, flags);
	248	}
	249
5beef3c9 AL	250	void hna_local_purge(struct work_struct *work)
	251	{
	252	struct hna_local_entry *hna_local_entry;
b6c35976	253	HASHIT(hashit);
5beef3c9 AL	254	unsigned long flags;
	255	unsigned long timeout;
	256
	257	spin_lock_irqsave(&hna_local_hash_lock, flags);
	258
b6c35976 SW	259	while (hash_iterate(hna_local_hash, &hashit)) {
b6c35976 SW	260	hna_local_entry = hashit.bucket->data;
5beef3c9 AL	261
	262	timeout = hna_local_entry->last_seen +
	263	((LOCAL_HNA_TIMEOUT / 1000) * HZ);
	264	if ((!hna_local_entry->never_purge) &&
	265	time_after(jiffies, timeout))
	266	hna_local_del(hna_local_entry, "address timed out");
	267	}
	268
	269	spin_unlock_irqrestore(&hna_local_hash_lock, flags);
	270	hna_local_start_timer();
	271	}
	272
	273	void hna_local_free(void)
	274	{
	275	if (!hna_local_hash)
	276	return;
	277
	278	cancel_delayed_work_sync(&hna_local_purge_wq);
	279	hash_delete(hna_local_hash, _hna_local_del);
	280	hna_local_hash = NULL;
	281	}
	282
	283	int hna_global_init(void)
	284	{
	285	if (hna_global_hash)
	286	return 1;
	287
	288	hna_global_hash = hash_new(128, compare_orig, choose_orig);
	289
	290	if (!hna_global_hash)
	291	return 0;
	292
	293	return 1;
	294	}
	295
	296	void hna_global_add_orig(struct orig_node *orig_node,
	297	unsigned char *hna_buff, int hna_buff_len)
	298	{
	299	struct hna_global_entry *hna_global_entry;
	300	struct hna_local_entry *hna_local_entry;
	301	struct hashtable_t *swaphash;
5beef3c9 AL	302	int hna_buff_count = 0;
	303	unsigned long flags;
	304	unsigned char *hna_ptr;
	305
5beef3c9 AL	306	while ((hna_buff_count + 1) * ETH_ALEN <= hna_buff_len) {
	307	spin_lock_irqsave(&hna_global_hash_lock, flags);
	308
	309	hna_ptr = hna_buff + (hna_buff_count * ETH_ALEN);
	310	hna_global_entry = (struct hna_global_entry *)
	311	hash_find(hna_global_hash, hna_ptr);
	312
	313	if (hna_global_entry == NULL) {
	314	spin_unlock_irqrestore(&hna_global_hash_lock, flags);
	315
	316	hna_global_entry =
	317	kmalloc(sizeof(struct hna_global_entry),
	318	GFP_ATOMIC);
	319
	320	if (!hna_global_entry)
	321	break;
	322
	323	memcpy(hna_global_entry->addr, hna_ptr, ETH_ALEN);
	324
bad2239e	325	bat_dbg(DBG_ROUTES,
6d45d8df SE	326	"Creating new global hna entry: "
6d45d8df SE	327	"%pM (via %pM)\n",
b9b27e4e	328	hna_global_entry->addr, orig_node->orig);
5beef3c9 AL	329
	330	spin_lock_irqsave(&hna_global_hash_lock, flags);
	331	hash_add(hna_global_hash, hna_global_entry);
	332
	333	}
	334
	335	hna_global_entry->orig_node = orig_node;
	336	spin_unlock_irqrestore(&hna_global_hash_lock, flags);
	337
	338	/* remove address from local hash if present */
	339	spin_lock_irqsave(&hna_local_hash_lock, flags);
	340
	341	hna_ptr = hna_buff + (hna_buff_count * ETH_ALEN);
	342	hna_local_entry = (struct hna_local_entry *)
	343	hash_find(hna_local_hash, hna_ptr);
	344
	345	if (hna_local_entry != NULL)
	346	hna_local_del(hna_local_entry, "global hna received");
	347
	348	spin_unlock_irqrestore(&hna_local_hash_lock, flags);
	349
	350	hna_buff_count++;
	351	}
	352
c4bf05d3 SW	353	/* initialize, and overwrite if malloc succeeds */
	354	orig_node->hna_buff = NULL;
	355	orig_node->hna_buff_len = 0;
	356
	357	if (hna_buff_len > 0) {
	358	orig_node->hna_buff = kmalloc(hna_buff_len, GFP_ATOMIC);
	359	if (orig_node->hna_buff) {
	360	memcpy(orig_node->hna_buff, hna_buff, hna_buff_len);
	361	orig_node->hna_buff_len = hna_buff_len;
	362	}
5beef3c9 AL	363	}
	364
	365	spin_lock_irqsave(&hna_global_hash_lock, flags);
	366
	367	if (hna_global_hash->elements * 4 > hna_global_hash->size) {
	368	swaphash = hash_resize(hna_global_hash,
	369	hna_global_hash->size * 2);
	370
	371	if (swaphash == NULL)
6d45d8df SE	372	printk(KERN_ERR "batman-adv:"
6d45d8df SE	373	"Couldn't resize global hna hash table\n");
5beef3c9 AL	374	else
	375	hna_global_hash = swaphash;
	376	}
	377
	378	spin_unlock_irqrestore(&hna_global_hash_lock, flags);
	379	}
	380
47fdf097 ML	381	int hna_global_fill_buffer_text(struct net_device net_dev, char buff,
47fdf097 ML	382	size_t count, loff_t off)
5beef3c9	383	{
208e13e4	384	struct bat_priv *bat_priv = netdev_priv(net_dev);
5beef3c9	385	struct hna_global_entry *hna_global_entry;
b6c35976	386	HASHIT(hashit);
5beef3c9 AL	387	int bytes_written = 0;
5beef3c9 AL	388	unsigned long flags;
47fdf097 ML	389	size_t hdr_len;
47fdf097 ML	390
208e13e4	391	if (!bat_priv->primary_if) {
14741240 ML	392	if (off == 0)
14741240 ML	393	return sprintf(buff,
6d45d8df SE	394	"BATMAN mesh %s disabled - "
	395	"please specify interfaces to enable it\n",
	396	net_dev->name);
14741240 ML	397
	398	return 0;
	399	}
14741240	400
47fdf097	401	hdr_len = sprintf(buff,
6d45d8df SE	402	"Globally announced HNAs received via the mesh %s "
6d45d8df SE	403	"(translation table):\n",
47fdf097 ML	404	net_dev->name);
	405
	406	if (off < hdr_len)
	407	bytes_written = hdr_len;
5beef3c9 AL	408
	409	spin_lock_irqsave(&hna_global_hash_lock, flags);
	410
b6c35976	411	while (hash_iterate(hna_global_hash, &hashit)) {
47fdf097 ML	412	hdr_len += 43;
	413
	414	if (count < bytes_written + 44)
5beef3c9 AL	415	break;
5beef3c9 AL	416
47fdf097 ML	417	if (off >= hdr_len)
	418	continue;
	419
b6c35976	420	hna_global_entry = hashit.bucket->data;
5beef3c9	421
47fdf097	422	bytes_written += snprintf(buff + bytes_written, 44,
6d45d8df	423	" * " MAC_FMT " via " MAC_FMT "\n",
5beef3c9 AL	424	hna_global_entry->addr[0],
	425	hna_global_entry->addr[1],
	426	hna_global_entry->addr[2],
	427	hna_global_entry->addr[3],
	428	hna_global_entry->addr[4],
	429	hna_global_entry->addr[5],
	430	hna_global_entry->orig_node->orig[0],
	431	hna_global_entry->orig_node->orig[1],
	432	hna_global_entry->orig_node->orig[2],
	433	hna_global_entry->orig_node->orig[3],
	434	hna_global_entry->orig_node->orig[4],
	435	hna_global_entry->orig_node->orig[5]);
	436	}
	437
	438	spin_unlock_irqrestore(&hna_global_hash_lock, flags);
5beef3c9 AL	439	return bytes_written;
	440	}
	441
	442	void _hna_global_del_orig(struct hna_global_entry *hna_global_entry,
	443	char *message)
	444	{
0887635b	445	bat_dbg(DBG_ROUTES, "Deleting global hna entry %pM (via %pM): %s\n",
b9b27e4e AL	446	hna_global_entry->addr, hna_global_entry->orig_node->orig,
b9b27e4e AL	447	message);
5beef3c9 AL	448
	449	hash_remove(hna_global_hash, hna_global_entry->addr);
	450	kfree(hna_global_entry);
	451	}
	452
	453	void hna_global_del_orig(struct orig_node orig_node, char message)
	454	{
	455	struct hna_global_entry *hna_global_entry;
	456	int hna_buff_count = 0;
	457	unsigned long flags;
	458	unsigned char *hna_ptr;
	459
	460	if (orig_node->hna_buff_len == 0)
	461	return;
	462
	463	spin_lock_irqsave(&hna_global_hash_lock, flags);
	464
	465	while ((hna_buff_count + 1) * ETH_ALEN <= orig_node->hna_buff_len) {
	466	hna_ptr = orig_node->hna_buff + (hna_buff_count * ETH_ALEN);
	467	hna_global_entry = (struct hna_global_entry *)
	468	hash_find(hna_global_hash, hna_ptr);
	469
	470	if ((hna_global_entry != NULL) &&
	471	(hna_global_entry->orig_node == orig_node))
	472	_hna_global_del_orig(hna_global_entry, message);
	473
	474	hna_buff_count++;
	475	}
	476
	477	spin_unlock_irqrestore(&hna_global_hash_lock, flags);
	478
	479	orig_node->hna_buff_len = 0;
	480	kfree(orig_node->hna_buff);
	481	orig_node->hna_buff = NULL;
	482	}
	483
	484	static void hna_global_del(void *data)
	485	{
	486	kfree(data);
	487	}
	488
	489	void hna_global_free(void)
	490	{
	491	if (!hna_global_hash)
	492	return;
	493
	494	hash_delete(hna_global_hash, hna_global_del);
	495	hna_global_hash = NULL;
	496	}
	497
	498	struct orig_node transtable_search(uint8_t addr)
	499	{
	500	struct hna_global_entry *hna_global_entry;
	501	unsigned long flags;
	502
	503	spin_lock_irqsave(&hna_global_hash_lock, flags);
	504	hna_global_entry = (struct hna_global_entry *)
	505	hash_find(hna_global_hash, addr);
	506	spin_unlock_irqrestore(&hna_global_hash_lock, flags);
	507
	508	if (hna_global_entry == NULL)
	509	return NULL;
	510
	511	return hna_global_entry->orig_node;
512	}