[net-next-2.6.git] / net / mac80211 / debugfs_key.c

/*
 * Copyright 2003-2005	Devicescape Software, Inc.
 * Copyright (c) 2006	Jiri Benc <jbenc@suse.cz>
 * Copyright 2007	Johannes Berg <johannes@sipsolutions.net>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 */

#include <linux/kobject.h>
#include <linux/slab.h>
#include "ieee80211_i.h"
#include "key.h"
#include "debugfs.h"
#include "debugfs_key.h"

#define KEY_READ(name, prop, buflen, format_string)			\
static ssize_t key_##name##_read(struct file *file,			\
				 char __user *userbuf,			\
				 size_t count, loff_t *ppos)		\
{									\
	char buf[buflen];						\
	struct ieee80211_key *key = file->private_data;			\
	int res = scnprintf(buf, buflen, format_string, key->prop);	\
	return simple_read_from_buffer(userbuf, count, ppos, buf, res);	\
}
#define KEY_READ_D(name) KEY_READ(name, name, 20, "%d\n")
#define KEY_READ_X(name) KEY_READ(name, name, 20, "0x%x\n")

#define KEY_OPS(name)							\
static const struct file_operations key_ ##name## _ops = {		\
	.read = key_##name##_read,					\
	.open = mac80211_open_file_generic,				\
	.llseek = generic_file_llseek,					\
}

#define KEY_FILE(name, format)						\
		 KEY_READ_##format(name)				\
		 KEY_OPS(name)

#define KEY_CONF_READ(name, buflen, format_string)			\
	KEY_READ(conf_##name, conf.name, buflen, format_string)
#define KEY_CONF_READ_D(name) KEY_CONF_READ(name, 20, "%d\n")

#define KEY_CONF_OPS(name)						\
static const struct file_operations key_ ##name## _ops = {		\
	.read = key_conf_##name##_read,					\
	.open = mac80211_open_file_generic,				\
	.llseek = generic_file_llseek,					\
}

#define KEY_CONF_FILE(name, format)					\
		 KEY_CONF_READ_##format(name)				\
		 KEY_CONF_OPS(name)

KEY_CONF_FILE(keylen, D);
KEY_CONF_FILE(keyidx, D);
KEY_CONF_FILE(hw_key_idx, D);
KEY_FILE(flags, X);
KEY_FILE(tx_rx_count, D);
KEY_READ(ifindex, sdata->name, IFNAMSIZ + 2, "%s\n");
KEY_OPS(ifindex);

static ssize_t key_algorithm_read(struct file *file,
				  char __user *userbuf,
				  size_t count, loff_t *ppos)
{
	char buf[15];
	struct ieee80211_key *key = file->private_data;
	u32 c = key->conf.cipher;

	sprintf(buf, "%.2x-%.2x-%.2x:%d\n",
		c >> 24, (c >> 16) & 0xff, (c >> 8) & 0xff, c & 0xff);
	return simple_read_from_buffer(userbuf, count, ppos, buf, strlen(buf));
}
KEY_OPS(algorithm);

static ssize_t key_tx_spec_read(struct file *file, char __user *userbuf,
				size_t count, loff_t *ppos)
{
	const u8 *tpn;
	char buf[20];
	int len;
	struct ieee80211_key *key = file->private_data;

	switch (key->conf.cipher) {
	case WLAN_CIPHER_SUITE_WEP40:
	case WLAN_CIPHER_SUITE_WEP104:
		len = scnprintf(buf, sizeof(buf), "\n");
		break;
	case WLAN_CIPHER_SUITE_TKIP:
		len = scnprintf(buf, sizeof(buf), "%08x %04x\n",
				key->u.tkip.tx.iv32,
				key->u.tkip.tx.iv16);
		break;
	case WLAN_CIPHER_SUITE_CCMP:
		tpn = key->u.ccmp.tx_pn;
		len = scnprintf(buf, sizeof(buf), "%02x%02x%02x%02x%02x%02x\n",
				tpn[0], tpn[1], tpn[2], tpn[3], tpn[4], tpn[5]);
		break;
	case WLAN_CIPHER_SUITE_AES_CMAC:
		tpn = key->u.aes_cmac.tx_pn;
		len = scnprintf(buf, sizeof(buf), "%02x%02x%02x%02x%02x%02x\n",
				tpn[0], tpn[1], tpn[2], tpn[3], tpn[4],
				tpn[5]);
		break;
	default:
		return 0;
	}
	return simple_read_from_buffer(userbuf, count, ppos, buf, len);
}
KEY_OPS(tx_spec);

static ssize_t key_rx_spec_read(struct file *file, char __user *userbuf,
				size_t count, loff_t *ppos)
{
	struct ieee80211_key *key = file->private_data;
	char buf[14*NUM_RX_DATA_QUEUES+1], *p = buf;
	int i, len;
	const u8 *rpn;

	switch (key->conf.cipher) {
	case WLAN_CIPHER_SUITE_WEP40:
	case WLAN_CIPHER_SUITE_WEP104:
		len = scnprintf(buf, sizeof(buf), "\n");
		break;
	case WLAN_CIPHER_SUITE_TKIP:
		for (i = 0; i < NUM_RX_DATA_QUEUES; i++)
			p += scnprintf(p, sizeof(buf)+buf-p,
				       "%08x %04x\n",
				       key->u.tkip.rx[i].iv32,
				       key->u.tkip.rx[i].iv16);
		len = p - buf;
		break;
	case WLAN_CIPHER_SUITE_CCMP:
		for (i = 0; i < NUM_RX_DATA_QUEUES + 1; i++) {
			rpn = key->u.ccmp.rx_pn[i];
			p += scnprintf(p, sizeof(buf)+buf-p,
				       "%02x%02x%02x%02x%02x%02x\n",
				       rpn[0], rpn[1], rpn[2],
				       rpn[3], rpn[4], rpn[5]);
		}
		len = p - buf;
		break;
	case WLAN_CIPHER_SUITE_AES_CMAC:
		rpn = key->u.aes_cmac.rx_pn;
		p += scnprintf(p, sizeof(buf)+buf-p,
			       "%02x%02x%02x%02x%02x%02x\n",
			       rpn[0], rpn[1], rpn[2],
			       rpn[3], rpn[4], rpn[5]);
		len = p - buf;
		break;
	default:
		return 0;
	}
	return simple_read_from_buffer(userbuf, count, ppos, buf, len);
}
KEY_OPS(rx_spec);

static ssize_t key_replays_read(struct file *file, char __user *userbuf,
				size_t count, loff_t *ppos)
{
	struct ieee80211_key *key = file->private_data;
	char buf[20];
	int len;

	switch (key->conf.cipher) {
	case WLAN_CIPHER_SUITE_CCMP:
		len = scnprintf(buf, sizeof(buf), "%u\n", key->u.ccmp.replays);
		break;
	case WLAN_CIPHER_SUITE_AES_CMAC:
		len = scnprintf(buf, sizeof(buf), "%u\n",
				key->u.aes_cmac.replays);
		break;
	default:
		return 0;
	}
	return simple_read_from_buffer(userbuf, count, ppos, buf, len);
}
KEY_OPS(replays);

static ssize_t key_icverrors_read(struct file *file, char __user *userbuf,
				  size_t count, loff_t *ppos)
{
	struct ieee80211_key *key = file->private_data;
	char buf[20];
	int len;

	switch (key->conf.cipher) {
	case WLAN_CIPHER_SUITE_AES_CMAC:
		len = scnprintf(buf, sizeof(buf), "%u\n",
				key->u.aes_cmac.icverrors);
		break;
	default:
		return 0;
	}
	return simple_read_from_buffer(userbuf, count, ppos, buf, len);
}
KEY_OPS(icverrors);

static ssize_t key_key_read(struct file *file, char __user *userbuf,
			    size_t count, loff_t *ppos)
{
	struct ieee80211_key *key = file->private_data;
	int i, bufsize = 2 * key->conf.keylen + 2;
	char *buf = kmalloc(bufsize, GFP_KERNEL);
	char *p = buf;
	ssize_t res;

	if (!buf)
		return -ENOMEM;

	for (i = 0; i < key->conf.keylen; i++)
		p += scnprintf(p, bufsize + buf - p, "%02x", key->conf.key[i]);
	p += scnprintf(p, bufsize+buf-p, "\n");
	res = simple_read_from_buffer(userbuf, count, ppos, buf, p - buf);
	kfree(buf);
	return res;
}
KEY_OPS(key);

#define DEBUGFS_ADD(name) \
	debugfs_create_file(#name, 0400, key->debugfs.dir, \
			    key, &key_##name##_ops);

void ieee80211_debugfs_key_add(struct ieee80211_key *key)
  {
	static int keycount;
	char buf[50];
	struct sta_info *sta;

	if (!key->local->debugfs.keys)
		return;

	sprintf(buf, "%d", keycount);
	key->debugfs.cnt = keycount;
	keycount++;
	key->debugfs.dir = debugfs_create_dir(buf,
					key->local->debugfs.keys);

	if (!key->debugfs.dir)
		return;

	rcu_read_lock();
	sta = rcu_dereference(key->sta);
	if (sta)
		sprintf(buf, "../../stations/%pM", sta->sta.addr);
	rcu_read_unlock();

	/* using sta as a boolean is fine outside RCU lock */
	if (sta)
		key->debugfs.stalink =
			debugfs_create_symlink("station", key->debugfs.dir, buf);

	DEBUGFS_ADD(keylen);
	DEBUGFS_ADD(flags);
	DEBUGFS_ADD(keyidx);
	DEBUGFS_ADD(hw_key_idx);
	DEBUGFS_ADD(tx_rx_count);
	DEBUGFS_ADD(algorithm);
	DEBUGFS_ADD(tx_spec);
	DEBUGFS_ADD(rx_spec);
	DEBUGFS_ADD(replays);
	DEBUGFS_ADD(icverrors);
	DEBUGFS_ADD(key);
	DEBUGFS_ADD(ifindex);
};

void ieee80211_debugfs_key_remove(struct ieee80211_key *key)
{
	if (!key)
		return;

	debugfs_remove_recursive(key->debugfs.dir);
	key->debugfs.dir = NULL;
}
void ieee80211_debugfs_key_add_default(struct ieee80211_sub_if_data *sdata)
{
	char buf[50];
	struct ieee80211_key *key;

	if (!sdata->debugfs.dir)
		return;

	/* this is running under the key lock */

	key = sdata->default_key;
	if (key) {
		sprintf(buf, "../keys/%d", key->debugfs.cnt);
		sdata->debugfs.default_key =
			debugfs_create_symlink("default_key",
					       sdata->debugfs.dir, buf);
	} else
		ieee80211_debugfs_key_remove_default(sdata);
}

void ieee80211_debugfs_key_remove_default(struct ieee80211_sub_if_data *sdata)
{
	if (!sdata)
		return;

	debugfs_remove(sdata->debugfs.default_key);
	sdata->debugfs.default_key = NULL;
}

void ieee80211_debugfs_key_add_mgmt_default(struct ieee80211_sub_if_data *sdata)
{
	char buf[50];
	struct ieee80211_key *key;

	if (!sdata->debugfs.dir)
		return;

	/* this is running under the key lock */

	key = sdata->default_mgmt_key;
	if (key) {
		sprintf(buf, "../keys/%d", key->debugfs.cnt);
		sdata->debugfs.default_mgmt_key =
			debugfs_create_symlink("default_mgmt_key",
					       sdata->debugfs.dir, buf);
	} else
		ieee80211_debugfs_key_remove_mgmt_default(sdata);
}

void ieee80211_debugfs_key_remove_mgmt_default(struct ieee80211_sub_if_data *sdata)
{
	if (!sdata)
		return;

	debugfs_remove(sdata->debugfs.default_mgmt_key);
	sdata->debugfs.default_mgmt_key = NULL;
}

void ieee80211_debugfs_key_sta_del(struct ieee80211_key *key,
				   struct sta_info *sta)
{
	debugfs_remove(key->debugfs.stalink);
	key->debugfs.stalink = NULL;
}
Commit	Line	Data
	1	/*
	2	* Copyright 2003-2005 Devicescape Software, Inc.
	3	* Copyright (c) 2006 Jiri Benc <jbenc@suse.cz>
	4	* Copyright 2007 Johannes Berg <johannes@sipsolutions.net>
	5	*
	6	* This program is free software; you can redistribute it and/or modify
	7	* it under the terms of the GNU General Public License version 2 as
	8	* published by the Free Software Foundation.
	9	*/
	10
	11	#include <linux/kobject.h>
	12	#include <linux/slab.h>
	13	#include "ieee80211_i.h"
	14	#include "key.h"
	15	#include "debugfs.h"
	16	#include "debugfs_key.h"
	17
	18	#define KEY_READ(name, prop, buflen, format_string) \
	19	static ssize_t key_##name##_read(struct file *file, \
	20	char __user *userbuf, \
	21	size_t count, loff_t *ppos) \
	22	{ \
	23	char buf[buflen]; \
	24	struct ieee80211_key *key = file->private_data; \
	25	int res = scnprintf(buf, buflen, format_string, key->prop); \
	26	return simple_read_from_buffer(userbuf, count, ppos, buf, res); \
	27	}
	28	#define KEY_READ_D(name) KEY_READ(name, name, 20, "%d\n")
	29	#define KEY_READ_X(name) KEY_READ(name, name, 20, "0x%x\n")
	30
	31	#define KEY_OPS(name) \
	32	static const struct file_operations key_ ##name## _ops = { \
	33	.read = key_##name##_read, \
	34	.open = mac80211_open_file_generic, \
	35	.llseek = generic_file_llseek, \
	36	}
	37
	38	#define KEY_FILE(name, format) \
	39	KEY_READ_##format(name) \
	40	KEY_OPS(name)
	41
	42	#define KEY_CONF_READ(name, buflen, format_string) \
	43	KEY_READ(conf_##name, conf.name, buflen, format_string)
	44	#define KEY_CONF_READ_D(name) KEY_CONF_READ(name, 20, "%d\n")
	45
	46	#define KEY_CONF_OPS(name) \
	47	static const struct file_operations key_ ##name## _ops = { \
	48	.read = key_conf_##name##_read, \
	49	.open = mac80211_open_file_generic, \
	50	.llseek = generic_file_llseek, \
	51	}
	52
	53	#define KEY_CONF_FILE(name, format) \
	54	KEY_CONF_READ_##format(name) \
	55	KEY_CONF_OPS(name)
	56
	57	KEY_CONF_FILE(keylen, D);
	58	KEY_CONF_FILE(keyidx, D);
	59	KEY_CONF_FILE(hw_key_idx, D);
	60	KEY_FILE(flags, X);
	61	KEY_FILE(tx_rx_count, D);
	62	KEY_READ(ifindex, sdata->name, IFNAMSIZ + 2, "%s\n");
	63	KEY_OPS(ifindex);
	64
	65	static ssize_t key_algorithm_read(struct file *file,
	66	char __user *userbuf,
	67	size_t count, loff_t *ppos)
	68	{
	69	char buf[15];
	70	struct ieee80211_key *key = file->private_data;
	71	u32 c = key->conf.cipher;
	72
	73	sprintf(buf, "%.2x-%.2x-%.2x:%d\n",
	74	c >> 24, (c >> 16) & 0xff, (c >> 8) & 0xff, c & 0xff);
	75	return simple_read_from_buffer(userbuf, count, ppos, buf, strlen(buf));
	76	}
	77	KEY_OPS(algorithm);
	78
	79	static ssize_t key_tx_spec_read(struct file file, char __user userbuf,
	80	size_t count, loff_t *ppos)
	81	{
	82	const u8 *tpn;
	83	char buf[20];
	84	int len;
	85	struct ieee80211_key *key = file->private_data;
	86
	87	switch (key->conf.cipher) {
	88	case WLAN_CIPHER_SUITE_WEP40:
	89	case WLAN_CIPHER_SUITE_WEP104:
	90	len = scnprintf(buf, sizeof(buf), "\n");
	91	break;
	92	case WLAN_CIPHER_SUITE_TKIP:
	93	len = scnprintf(buf, sizeof(buf), "%08x %04x\n",
	94	key->u.tkip.tx.iv32,
	95	key->u.tkip.tx.iv16);
	96	break;
	97	case WLAN_CIPHER_SUITE_CCMP:
	98	tpn = key->u.ccmp.tx_pn;
	99	len = scnprintf(buf, sizeof(buf), "%02x%02x%02x%02x%02x%02x\n",
	100	tpn[0], tpn[1], tpn[2], tpn[3], tpn[4], tpn[5]);
	101	break;
	102	case WLAN_CIPHER_SUITE_AES_CMAC:
	103	tpn = key->u.aes_cmac.tx_pn;
	104	len = scnprintf(buf, sizeof(buf), "%02x%02x%02x%02x%02x%02x\n",
	105	tpn[0], tpn[1], tpn[2], tpn[3], tpn[4],
	106	tpn[5]);
	107	break;
	108	default:
	109	return 0;
	110	}
	111	return simple_read_from_buffer(userbuf, count, ppos, buf, len);
	112	}
	113	KEY_OPS(tx_spec);
	114
	115	static ssize_t key_rx_spec_read(struct file file, char __user userbuf,
	116	size_t count, loff_t *ppos)
	117	{
	118	struct ieee80211_key *key = file->private_data;
	119	char buf[14NUM_RX_DATA_QUEUES+1], p = buf;
	120	int i, len;
	121	const u8 *rpn;
	122
	123	switch (key->conf.cipher) {
	124	case WLAN_CIPHER_SUITE_WEP40:
	125	case WLAN_CIPHER_SUITE_WEP104:
	126	len = scnprintf(buf, sizeof(buf), "\n");
	127	break;
	128	case WLAN_CIPHER_SUITE_TKIP:
	129	for (i = 0; i < NUM_RX_DATA_QUEUES; i++)
	130	p += scnprintf(p, sizeof(buf)+buf-p,
	131	"%08x %04x\n",
	132	key->u.tkip.rx[i].iv32,
	133	key->u.tkip.rx[i].iv16);
	134	len = p - buf;
	135	break;
	136	case WLAN_CIPHER_SUITE_CCMP:
	137	for (i = 0; i < NUM_RX_DATA_QUEUES + 1; i++) {
	138	rpn = key->u.ccmp.rx_pn[i];
	139	p += scnprintf(p, sizeof(buf)+buf-p,
	140	"%02x%02x%02x%02x%02x%02x\n",
	141	rpn[0], rpn[1], rpn[2],
	142	rpn[3], rpn[4], rpn[5]);
	143	}
	144	len = p - buf;
	145	break;
	146	case WLAN_CIPHER_SUITE_AES_CMAC:
	147	rpn = key->u.aes_cmac.rx_pn;
	148	p += scnprintf(p, sizeof(buf)+buf-p,
	149	"%02x%02x%02x%02x%02x%02x\n",
	150	rpn[0], rpn[1], rpn[2],
	151	rpn[3], rpn[4], rpn[5]);
	152	len = p - buf;
	153	break;
	154	default:
	155	return 0;
	156	}
	157	return simple_read_from_buffer(userbuf, count, ppos, buf, len);
	158	}
	159	KEY_OPS(rx_spec);
	160
	161	static ssize_t key_replays_read(struct file file, char __user userbuf,
	162	size_t count, loff_t *ppos)
	163	{
	164	struct ieee80211_key *key = file->private_data;
	165	char buf[20];
	166	int len;
	167
	168	switch (key->conf.cipher) {
	169	case WLAN_CIPHER_SUITE_CCMP:
	170	len = scnprintf(buf, sizeof(buf), "%u\n", key->u.ccmp.replays);
	171	break;
	172	case WLAN_CIPHER_SUITE_AES_CMAC:
	173	len = scnprintf(buf, sizeof(buf), "%u\n",
	174	key->u.aes_cmac.replays);
	175	break;
	176	default:
	177	return 0;
	178	}
	179	return simple_read_from_buffer(userbuf, count, ppos, buf, len);
	180	}
	181	KEY_OPS(replays);
	182
	183	static ssize_t key_icverrors_read(struct file file, char __user userbuf,
	184	size_t count, loff_t *ppos)
	185	{
	186	struct ieee80211_key *key = file->private_data;
	187	char buf[20];
	188	int len;
	189
	190	switch (key->conf.cipher) {
	191	case WLAN_CIPHER_SUITE_AES_CMAC:
	192	len = scnprintf(buf, sizeof(buf), "%u\n",
	193	key->u.aes_cmac.icverrors);
	194	break;
	195	default:
	196	return 0;
	197	}
	198	return simple_read_from_buffer(userbuf, count, ppos, buf, len);
	199	}
	200	KEY_OPS(icverrors);
	201
	202	static ssize_t key_key_read(struct file file, char __user userbuf,
	203	size_t count, loff_t *ppos)
	204	{
	205	struct ieee80211_key *key = file->private_data;
	206	int i, bufsize = 2 * key->conf.keylen + 2;
	207	char *buf = kmalloc(bufsize, GFP_KERNEL);
	208	char *p = buf;
	209	ssize_t res;
	210
	211	if (!buf)
	212	return -ENOMEM;
	213
	214	for (i = 0; i < key->conf.keylen; i++)
	215	p += scnprintf(p, bufsize + buf - p, "%02x", key->conf.key[i]);
	216	p += scnprintf(p, bufsize+buf-p, "\n");
	217	res = simple_read_from_buffer(userbuf, count, ppos, buf, p - buf);
	218	kfree(buf);
	219	return res;
	220	}
	221	KEY_OPS(key);
	222
	223	#define DEBUGFS_ADD(name) \
	224	debugfs_create_file(#name, 0400, key->debugfs.dir, \
	225	key, &key_##name##_ops);
	226
	227	void ieee80211_debugfs_key_add(struct ieee80211_key *key)
	228	{
	229	static int keycount;
	230	char buf[50];
	231	struct sta_info *sta;
	232
	233	if (!key->local->debugfs.keys)
	234	return;
	235
	236	sprintf(buf, "%d", keycount);
	237	key->debugfs.cnt = keycount;
	238	keycount++;
	239	key->debugfs.dir = debugfs_create_dir(buf,
	240	key->local->debugfs.keys);
	241
	242	if (!key->debugfs.dir)
	243	return;
	244
	245	rcu_read_lock();
	246	sta = rcu_dereference(key->sta);
	247	if (sta)
	248	sprintf(buf, "../../stations/%pM", sta->sta.addr);
	249	rcu_read_unlock();
	250
	251	/* using sta as a boolean is fine outside RCU lock */
	252	if (sta)
	253	key->debugfs.stalink =
	254	debugfs_create_symlink("station", key->debugfs.dir, buf);
	255
	256	DEBUGFS_ADD(keylen);
	257	DEBUGFS_ADD(flags);
	258	DEBUGFS_ADD(keyidx);
	259	DEBUGFS_ADD(hw_key_idx);
	260	DEBUGFS_ADD(tx_rx_count);
	261	DEBUGFS_ADD(algorithm);
	262	DEBUGFS_ADD(tx_spec);
	263	DEBUGFS_ADD(rx_spec);
	264	DEBUGFS_ADD(replays);
	265	DEBUGFS_ADD(icverrors);
	266	DEBUGFS_ADD(key);
	267	DEBUGFS_ADD(ifindex);
	268	};
	269
	270	void ieee80211_debugfs_key_remove(struct ieee80211_key *key)
	271	{
	272	if (!key)
	273	return;
	274
	275	debugfs_remove_recursive(key->debugfs.dir);
	276	key->debugfs.dir = NULL;
	277	}
	278	void ieee80211_debugfs_key_add_default(struct ieee80211_sub_if_data *sdata)
	279	{
	280	char buf[50];
	281	struct ieee80211_key *key;
	282
	283	if (!sdata->debugfs.dir)
	284	return;
	285
	286	/* this is running under the key lock */
	287
	288	key = sdata->default_key;
	289	if (key) {
	290	sprintf(buf, "../keys/%d", key->debugfs.cnt);
	291	sdata->debugfs.default_key =
	292	debugfs_create_symlink("default_key",
	293	sdata->debugfs.dir, buf);
	294	} else
	295	ieee80211_debugfs_key_remove_default(sdata);
	296	}
	297
	298	void ieee80211_debugfs_key_remove_default(struct ieee80211_sub_if_data *sdata)
	299	{
	300	if (!sdata)
	301	return;
	302
	303	debugfs_remove(sdata->debugfs.default_key);
	304	sdata->debugfs.default_key = NULL;
	305	}
	306
	307	void ieee80211_debugfs_key_add_mgmt_default(struct ieee80211_sub_if_data *sdata)
	308	{
	309	char buf[50];
	310	struct ieee80211_key *key;
	311
	312	if (!sdata->debugfs.dir)
	313	return;
	314
	315	/* this is running under the key lock */
	316
	317	key = sdata->default_mgmt_key;
	318	if (key) {
	319	sprintf(buf, "../keys/%d", key->debugfs.cnt);
	320	sdata->debugfs.default_mgmt_key =
	321	debugfs_create_symlink("default_mgmt_key",
	322	sdata->debugfs.dir, buf);
	323	} else
	324	ieee80211_debugfs_key_remove_mgmt_default(sdata);
	325	}
	326
	327	void ieee80211_debugfs_key_remove_mgmt_default(struct ieee80211_sub_if_data *sdata)
	328	{
	329	if (!sdata)
	330	return;
	331
	332	debugfs_remove(sdata->debugfs.default_mgmt_key);
	333	sdata->debugfs.default_mgmt_key = NULL;
	334	}
	335
	336	void ieee80211_debugfs_key_sta_del(struct ieee80211_key *key,
	337	struct sta_info *sta)
	338	{
	339	debugfs_remove(key->debugfs.stalink);
	340	key->debugfs.stalink = NULL;
	341	}