[GitHub/mt8127/android_kernel_alcatel_ttab.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 void hna_local_purge(struct work_struct *work);
static DECLARE_DELAYED_WORK(hna_local_purge_wq, hna_local_purge);
static void _hna_global_del_orig(struct hna_global_entry *hna_global_entry,
				 char *message);

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);
}

static 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 * HZ) / 1000);
		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;
}

static 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
42fa1b92	35	static void hna_local_purge(struct work_struct *work);
5beef3c9	36	static DECLARE_DELAYED_WORK(hna_local_purge_wq, hna_local_purge);
42fa1b92 SE	37	static void _hna_global_del_orig(struct hna_global_entry *hna_global_entry,
42fa1b92 SE	38	char *message);
5beef3c9 AL	39
	40	static void hna_local_start_timer(void)
	41	{
	42	queue_delayed_work(bat_event_workqueue, &hna_local_purge_wq, 10 * HZ);
	43	}
	44
	45	int hna_local_init(void)
	46	{
	47	if (hna_local_hash)
	48	return 1;
	49
	50	hna_local_hash = hash_new(128, compare_orig, choose_orig);
	51
	52	if (!hna_local_hash)
	53	return 0;
	54
	55	atomic_set(&hna_local_changed, 0);
	56	hna_local_start_timer();
	57
	58	return 1;
	59	}
	60
	61	void hna_local_add(uint8_t *addr)
	62	{
	63	struct hna_local_entry *hna_local_entry;
	64	struct hna_global_entry *hna_global_entry;
	65	struct hashtable_t *swaphash;
5beef3c9 AL	66	unsigned long flags;
	67
	68	spin_lock_irqsave(&hna_local_hash_lock, flags);
	69	hna_local_entry =
	70	((struct hna_local_entry *)hash_find(hna_local_hash, addr));
	71	spin_unlock_irqrestore(&hna_local_hash_lock, flags);
	72
	73	if (hna_local_entry != NULL) {
	74	hna_local_entry->last_seen = jiffies;
	75	return;
	76	}
	77
5beef3c9 AL	78	/* only announce as many hosts as possible in the batman-packet and
	79	space in batman_packet->num_hna That also should give a limit to
	80	MAC-flooding. */
	81	if ((num_hna + 1 > (ETH_DATA_LEN - BAT_PACKET_LEN) / ETH_ALEN) \|\|
	82	(num_hna + 1 > 255)) {
6d45d8df SE	83	bat_dbg(DBG_ROUTES,
	84	"Can't add new local hna entry (%pM): "
	85	"number of local hna entries exceeds packet size\n",
	86	addr);
5beef3c9 AL	87	return;
	88	}
	89
0887635b	90	bat_dbg(DBG_ROUTES, "Creating new local hna entry: %pM\n",
b9b27e4e	91	addr);
5beef3c9 AL	92
	93	hna_local_entry = kmalloc(sizeof(struct hna_local_entry), GFP_ATOMIC);
	94	if (!hna_local_entry)
	95	return;
	96
	97	memcpy(hna_local_entry->addr, addr, ETH_ALEN);
	98	hna_local_entry->last_seen = jiffies;
	99
	100	/* the batman interface mac address should never be purged */
	101	if (compare_orig(addr, soft_device->dev_addr))
	102	hna_local_entry->never_purge = 1;
	103	else
	104	hna_local_entry->never_purge = 0;
	105
	106	spin_lock_irqsave(&hna_local_hash_lock, flags);
	107
	108	hash_add(hna_local_hash, hna_local_entry);
	109	num_hna++;
	110	atomic_set(&hna_local_changed, 1);
	111
	112	if (hna_local_hash->elements * 4 > hna_local_hash->size) {
	113	swaphash = hash_resize(hna_local_hash,
	114	hna_local_hash->size * 2);
	115
	116	if (swaphash == NULL)
6d45d8df SE	117	printk(KERN_ERR "batman-adv:"
6d45d8df SE	118	"Couldn't resize local hna hash table\n");
5beef3c9 AL	119	else
	120	hna_local_hash = swaphash;
	121	}
	122
	123	spin_unlock_irqrestore(&hna_local_hash_lock, flags);
	124
	125	/* remove address from global hash if present */
	126	spin_lock_irqsave(&hna_global_hash_lock, flags);
	127
	128	hna_global_entry =
	129	((struct hna_global_entry *)hash_find(hna_global_hash, addr));
	130
	131	if (hna_global_entry != NULL)
	132	_hna_global_del_orig(hna_global_entry, "local hna received");
	133
	134	spin_unlock_irqrestore(&hna_global_hash_lock, flags);
	135	}
	136
	137	int hna_local_fill_buffer(unsigned char *buff, int buff_len)
	138	{
	139	struct hna_local_entry *hna_local_entry;
b6c35976	140	HASHIT(hashit);
5beef3c9 AL	141	int i = 0;
	142	unsigned long flags;
	143
	144	spin_lock_irqsave(&hna_local_hash_lock, flags);
	145
b6c35976	146	while (hash_iterate(hna_local_hash, &hashit)) {
5beef3c9 AL	147
	148	if (buff_len < (i + 1) * ETH_ALEN)
	149	break;
	150
b6c35976	151	hna_local_entry = hashit.bucket->data;
5beef3c9 AL	152	memcpy(buff + (i * ETH_ALEN), hna_local_entry->addr, ETH_ALEN);
	153
	154	i++;
	155	}
	156
	157	/* if we did not get all new local hnas see you next time ;-) */
	158	if (i == num_hna)
	159	atomic_set(&hna_local_changed, 0);
	160
	161	spin_unlock_irqrestore(&hna_local_hash_lock, flags);
	162
	163	return i;
	164	}
	165
4caecbc0	166	int hna_local_seq_print_text(struct seq_file seq, void offset)
5beef3c9	167	{
4caecbc0	168	struct net_device net_dev = (struct net_device )seq->private;
208e13e4	169	struct bat_priv *bat_priv = netdev_priv(net_dev);
5beef3c9	170	struct hna_local_entry *hna_local_entry;
b6c35976	171	HASHIT(hashit);
4caecbc0	172	HASHIT(hashit_count);
5beef3c9	173	unsigned long flags;
4caecbc0 SE	174	size_t buf_size, pos;
4caecbc0 SE	175	char *buff;
47fdf097	176
208e13e4	177	if (!bat_priv->primary_if) {
4caecbc0 SE	178	return seq_printf(seq, "BATMAN mesh %s disabled - "
	179	"please specify interfaces to enable it\n",
	180	net_dev->name);
14741240	181	}
14741240	182
4caecbc0 SE	183	seq_printf(seq, "Locally retrieved addresses (from %s) "
	184	"announced via HNA:\n",
	185	net_dev->name);
5beef3c9 AL	186
	187	spin_lock_irqsave(&hna_local_hash_lock, flags);
	188
4caecbc0 SE	189	buf_size = 1;
	190	/* Estimate length for: " * xx:xx:xx:xx:xx:xx\n" */
	191	while (hash_iterate(hna_local_hash, &hashit_count))
	192	buf_size += 21;
5beef3c9	193
4caecbc0 SE	194	buff = kmalloc(buf_size, GFP_ATOMIC);
	195	if (!buff) {
	196	spin_unlock_irqrestore(&hna_local_hash_lock, flags);
	197	return -ENOMEM;
	198	}
	199	buff[0] = '\0';
	200	pos = 0;
47fdf097	201
4caecbc0	202	while (hash_iterate(hna_local_hash, &hashit)) {
b6c35976	203	hna_local_entry = hashit.bucket->data;
5beef3c9	204
516c9a77 JP	205	pos += snprintf(buff + pos, 22, " * %pM\n",
516c9a77 JP	206	hna_local_entry->addr);
5beef3c9 AL	207	}
	208
	209	spin_unlock_irqrestore(&hna_local_hash_lock, flags);
4caecbc0 SE	210
	211	seq_printf(seq, "%s", buff);
	212	kfree(buff);
	213	return 0;
5beef3c9 AL	214	}
	215
	216	static void _hna_local_del(void *data)
	217	{
	218	kfree(data);
	219	num_hna--;
	220	atomic_set(&hna_local_changed, 1);
	221	}
	222
	223	static void hna_local_del(struct hna_local_entry *hna_local_entry,
	224	char *message)
	225	{
0887635b	226	bat_dbg(DBG_ROUTES, "Deleting local hna entry (%pM): %s\n",
b9b27e4e	227	hna_local_entry->addr, message);
5beef3c9 AL	228
	229	hash_remove(hna_local_hash, hna_local_entry->addr);
	230	_hna_local_del(hna_local_entry);
	231	}
	232
a9c2910a AL	233	void hna_local_remove(uint8_t addr, char message)
	234	{
	235	struct hna_local_entry *hna_local_entry;
	236	unsigned long flags;
	237
	238	spin_lock_irqsave(&hna_local_hash_lock, flags);
	239
	240	hna_local_entry = (struct hna_local_entry *)
	241	hash_find(hna_local_hash, addr);
	242	if (hna_local_entry)
	243	hna_local_del(hna_local_entry, message);
	244
	245	spin_unlock_irqrestore(&hna_local_hash_lock, flags);
	246	}
	247
42fa1b92	248	static void hna_local_purge(struct work_struct *work)
5beef3c9 AL	249	{
5beef3c9 AL	250	struct hna_local_entry *hna_local_entry;
b6c35976	251	HASHIT(hashit);
5beef3c9 AL	252	unsigned long flags;
	253	unsigned long timeout;
	254
	255	spin_lock_irqsave(&hna_local_hash_lock, flags);
	256
b6c35976 SW	257	while (hash_iterate(hna_local_hash, &hashit)) {
b6c35976 SW	258	hna_local_entry = hashit.bucket->data;
5beef3c9 AL	259
5beef3c9 AL	260	timeout = hna_local_entry->last_seen +
a14ca61d	261	((LOCAL_HNA_TIMEOUT * HZ) / 1000);
5beef3c9 AL	262	if ((!hna_local_entry->never_purge) &&
	263	time_after(jiffies, timeout))
	264	hna_local_del(hna_local_entry, "address timed out");
	265	}
	266
	267	spin_unlock_irqrestore(&hna_local_hash_lock, flags);
	268	hna_local_start_timer();
	269	}
	270
	271	void hna_local_free(void)
	272	{
	273	if (!hna_local_hash)
	274	return;
	275
	276	cancel_delayed_work_sync(&hna_local_purge_wq);
	277	hash_delete(hna_local_hash, _hna_local_del);
	278	hna_local_hash = NULL;
	279	}
	280
	281	int hna_global_init(void)
	282	{
	283	if (hna_global_hash)
	284	return 1;
	285
	286	hna_global_hash = hash_new(128, compare_orig, choose_orig);
	287
	288	if (!hna_global_hash)
	289	return 0;
	290
	291	return 1;
	292	}
	293
	294	void hna_global_add_orig(struct orig_node *orig_node,
	295	unsigned char *hna_buff, int hna_buff_len)
	296	{
	297	struct hna_global_entry *hna_global_entry;
	298	struct hna_local_entry *hna_local_entry;
	299	struct hashtable_t *swaphash;
5beef3c9 AL	300	int hna_buff_count = 0;
	301	unsigned long flags;
	302	unsigned char *hna_ptr;
	303
5beef3c9 AL	304	while ((hna_buff_count + 1) * ETH_ALEN <= hna_buff_len) {
	305	spin_lock_irqsave(&hna_global_hash_lock, flags);
	306
	307	hna_ptr = hna_buff + (hna_buff_count * ETH_ALEN);
	308	hna_global_entry = (struct hna_global_entry *)
	309	hash_find(hna_global_hash, hna_ptr);
	310
	311	if (hna_global_entry == NULL) {
	312	spin_unlock_irqrestore(&hna_global_hash_lock, flags);
	313
	314	hna_global_entry =
	315	kmalloc(sizeof(struct hna_global_entry),
	316	GFP_ATOMIC);
	317
	318	if (!hna_global_entry)
	319	break;
	320
	321	memcpy(hna_global_entry->addr, hna_ptr, ETH_ALEN);
	322
bad2239e	323	bat_dbg(DBG_ROUTES,
6d45d8df SE	324	"Creating new global hna entry: "
6d45d8df SE	325	"%pM (via %pM)\n",
b9b27e4e	326	hna_global_entry->addr, orig_node->orig);
5beef3c9 AL	327
	328	spin_lock_irqsave(&hna_global_hash_lock, flags);
	329	hash_add(hna_global_hash, hna_global_entry);
	330
	331	}
	332
	333	hna_global_entry->orig_node = orig_node;
	334	spin_unlock_irqrestore(&hna_global_hash_lock, flags);
	335
	336	/* remove address from local hash if present */
	337	spin_lock_irqsave(&hna_local_hash_lock, flags);
	338
	339	hna_ptr = hna_buff + (hna_buff_count * ETH_ALEN);
	340	hna_local_entry = (struct hna_local_entry *)
	341	hash_find(hna_local_hash, hna_ptr);
	342
	343	if (hna_local_entry != NULL)
	344	hna_local_del(hna_local_entry, "global hna received");
	345
	346	spin_unlock_irqrestore(&hna_local_hash_lock, flags);
	347
	348	hna_buff_count++;
	349	}
	350
c4bf05d3 SW	351	/* initialize, and overwrite if malloc succeeds */
	352	orig_node->hna_buff = NULL;
	353	orig_node->hna_buff_len = 0;
	354
	355	if (hna_buff_len > 0) {
	356	orig_node->hna_buff = kmalloc(hna_buff_len, GFP_ATOMIC);
	357	if (orig_node->hna_buff) {
	358	memcpy(orig_node->hna_buff, hna_buff, hna_buff_len);
	359	orig_node->hna_buff_len = hna_buff_len;
	360	}
5beef3c9 AL	361	}
	362
	363	spin_lock_irqsave(&hna_global_hash_lock, flags);
	364
	365	if (hna_global_hash->elements * 4 > hna_global_hash->size) {
	366	swaphash = hash_resize(hna_global_hash,
	367	hna_global_hash->size * 2);
	368
	369	if (swaphash == NULL)
6d45d8df SE	370	printk(KERN_ERR "batman-adv:"
6d45d8df SE	371	"Couldn't resize global hna hash table\n");
5beef3c9 AL	372	else
	373	hna_global_hash = swaphash;
	374	}
	375
	376	spin_unlock_irqrestore(&hna_global_hash_lock, flags);
	377	}
	378
4caecbc0	379	int hna_global_seq_print_text(struct seq_file seq, void offset)
5beef3c9	380	{
4caecbc0	381	struct net_device net_dev = (struct net_device )seq->private;
208e13e4	382	struct bat_priv *bat_priv = netdev_priv(net_dev);
5beef3c9	383	struct hna_global_entry *hna_global_entry;
b6c35976	384	HASHIT(hashit);
4caecbc0	385	HASHIT(hashit_count);
5beef3c9	386	unsigned long flags;
4caecbc0 SE	387	size_t buf_size, pos;
4caecbc0 SE	388	char *buff;
47fdf097	389
208e13e4	390	if (!bat_priv->primary_if) {
4caecbc0 SE	391	return seq_printf(seq, "BATMAN mesh %s disabled - "
	392	"please specify interfaces to enable it\n",
	393	net_dev->name);
14741240	394	}
14741240	395
1bcb164e	396	seq_printf(seq, "Globally announced HNAs received via the mesh %s\n",
4caecbc0	397	net_dev->name);
5beef3c9 AL	398
	399	spin_lock_irqsave(&hna_global_hash_lock, flags);
	400
4caecbc0 SE	401	buf_size = 1;
	402	/* Estimate length for: " * xx:xx:xx:xx:xx:xx via xx:xx:xx:xx:xx:xx\n"*/
	403	while (hash_iterate(hna_global_hash, &hashit_count))
	404	buf_size += 43;
5beef3c9	405
4caecbc0 SE	406	buff = kmalloc(buf_size, GFP_ATOMIC);
	407	if (!buff) {
	408	spin_unlock_irqrestore(&hna_global_hash_lock, flags);
	409	return -ENOMEM;
	410	}
	411	buff[0] = '\0';
	412	pos = 0;
47fdf097	413
4caecbc0	414	while (hash_iterate(hna_global_hash, &hashit)) {
b6c35976	415	hna_global_entry = hashit.bucket->data;
5beef3c9	416
4caecbc0	417	pos += snprintf(buff + pos, 44,
516c9a77 JP	418	" * %pM via %pM\n", hna_global_entry->addr,
516c9a77 JP	419	hna_global_entry->orig_node->orig);
5beef3c9 AL	420	}
	421
	422	spin_unlock_irqrestore(&hna_global_hash_lock, flags);
4caecbc0 SE	423
	424	seq_printf(seq, "%s", buff);
	425	kfree(buff);
	426	return 0;
5beef3c9 AL	427	}
5beef3c9 AL	428
42fa1b92 SE	429	static void _hna_global_del_orig(struct hna_global_entry *hna_global_entry,
42fa1b92 SE	430	char *message)
5beef3c9	431	{
0887635b	432	bat_dbg(DBG_ROUTES, "Deleting global hna entry %pM (via %pM): %s\n",
b9b27e4e AL	433	hna_global_entry->addr, hna_global_entry->orig_node->orig,
b9b27e4e AL	434	message);
5beef3c9 AL	435
	436	hash_remove(hna_global_hash, hna_global_entry->addr);
	437	kfree(hna_global_entry);
	438	}
	439
	440	void hna_global_del_orig(struct orig_node orig_node, char message)
	441	{
	442	struct hna_global_entry *hna_global_entry;
	443	int hna_buff_count = 0;
	444	unsigned long flags;
	445	unsigned char *hna_ptr;
	446
	447	if (orig_node->hna_buff_len == 0)
	448	return;
	449
	450	spin_lock_irqsave(&hna_global_hash_lock, flags);
	451
	452	while ((hna_buff_count + 1) * ETH_ALEN <= orig_node->hna_buff_len) {
	453	hna_ptr = orig_node->hna_buff + (hna_buff_count * ETH_ALEN);
	454	hna_global_entry = (struct hna_global_entry *)
	455	hash_find(hna_global_hash, hna_ptr);
	456
	457	if ((hna_global_entry != NULL) &&
	458	(hna_global_entry->orig_node == orig_node))
	459	_hna_global_del_orig(hna_global_entry, message);
	460
	461	hna_buff_count++;
	462	}
	463
	464	spin_unlock_irqrestore(&hna_global_hash_lock, flags);
	465
	466	orig_node->hna_buff_len = 0;
	467	kfree(orig_node->hna_buff);
	468	orig_node->hna_buff = NULL;
	469	}
	470
	471	static void hna_global_del(void *data)
	472	{
	473	kfree(data);
	474	}
	475
	476	void hna_global_free(void)
	477	{
	478	if (!hna_global_hash)
	479	return;
	480
	481	hash_delete(hna_global_hash, hna_global_del);
	482	hna_global_hash = NULL;
	483	}
	484
	485	struct orig_node transtable_search(uint8_t addr)
	486	{
	487	struct hna_global_entry *hna_global_entry;
	488	unsigned long flags;
	489
	490	spin_lock_irqsave(&hna_global_hash_lock, flags);
	491	hna_global_entry = (struct hna_global_entry *)
	492	hash_find(hna_global_hash, addr);
	493	spin_unlock_irqrestore(&hna_global_hash_lock, flags);
	494
	495	if (hna_global_entry == NULL)
	496	return NULL;
	497
	498	return hna_global_entry->orig_node;
499	}