[linux-2.6-block.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 "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,				\
}

#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,				\
}

#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->dev->ifindex, 20, "%d\n");
KEY_OPS(ifindex);

static ssize_t key_algorithm_read(struct file *file,
				  char __user *userbuf,
				  size_t count, loff_t *ppos)
{
	char *alg;
	struct ieee80211_key *key = file->private_data;

	switch (key->conf.alg) {
	case ALG_WEP:
		alg = "WEP\n";
		break;
	case ALG_TKIP:
		alg = "TKIP\n";
		break;
	case ALG_CCMP:
		alg = "CCMP\n";
		break;
	default:
		return 0;
	}
	return simple_read_from_buffer(userbuf, count, ppos, alg, strlen(alg));
}
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.alg) {
	case ALG_WEP:
		len = scnprintf(buf, sizeof(buf), "\n");
		break;
	case ALG_TKIP:
		len = scnprintf(buf, sizeof(buf), "%08x %04x\n",
				key->u.tkip.tx.iv32,
				key->u.tkip.tx.iv16);
		break;
	case ALG_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;
	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.alg) {
	case ALG_WEP:
		len = scnprintf(buf, sizeof(buf), "\n");
		break;
	case ALG_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 ALG_CCMP:
		for (i = 0; i < NUM_RX_DATA_QUEUES; 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;
	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;

	if (key->conf.alg != ALG_CCMP)
		return 0;
	len = scnprintf(buf, sizeof(buf), "%u\n", key->u.ccmp.replays);
	return simple_read_from_buffer(userbuf, count, ppos, buf, len);
}
KEY_OPS(replays);

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, res, bufsize = 2 * key->conf.keylen + 2;
	char *buf = kmalloc(bufsize, GFP_KERNEL);
	char *p = buf;

	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) \
	key->debugfs.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];
	DECLARE_MAC_BUF(mac);
	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/%s", print_mac(mac, 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(key);
	DEBUGFS_ADD(ifindex);
};

#define DEBUGFS_DEL(name) \
	debugfs_remove(key->debugfs.name); key->debugfs.name = NULL;

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

	DEBUGFS_DEL(keylen);
	DEBUGFS_DEL(flags);
	DEBUGFS_DEL(keyidx);
	DEBUGFS_DEL(hw_key_idx);
	DEBUGFS_DEL(tx_rx_count);
	DEBUGFS_DEL(algorithm);
	DEBUGFS_DEL(tx_spec);
	DEBUGFS_DEL(rx_spec);
	DEBUGFS_DEL(replays);
	DEBUGFS_DEL(key);
	DEBUGFS_DEL(ifindex);

	debugfs_remove(key->debugfs.stalink);
	key->debugfs.stalink = NULL;
	debugfs_remove(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->debugfsdir)
		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->debugfsdir, 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_sta_del(struct ieee80211_key *key,
				   struct sta_info *sta)
{
	debugfs_remove(key->debugfs.stalink);
	key->debugfs.stalink = NULL;
}
Commit	Line	Data
e9f207f0 JB	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 "ieee80211_i.h"
2c8dccc7	13	#include "key.h"
e9f207f0 JB	14	#include "debugfs.h"
	15	#include "debugfs_key.h"
	16
8f20fc24	17	#define KEY_READ(name, prop, buflen, format_string) \
e9f207f0 JB	18	static ssize_t key_##name##_read(struct file *file, \
	19	char __user *userbuf, \
	20	size_t count, loff_t *ppos) \
	21	{ \
	22	char buf[buflen]; \
	23	struct ieee80211_key *key = file->private_data; \
8f20fc24	24	int res = scnprintf(buf, buflen, format_string, key->prop); \
e9f207f0 JB	25	return simple_read_from_buffer(userbuf, count, ppos, buf, res); \
e9f207f0 JB	26	}
8f20fc24	27	#define KEY_READ_D(name) KEY_READ(name, name, 20, "%d\n")
11a843b7	28	#define KEY_READ_X(name) KEY_READ(name, name, 20, "0x%x\n")
e9f207f0 JB	29
	30	#define KEY_OPS(name) \
	31	static const struct file_operations key_ ##name## _ops = { \
	32	.read = key_##name##_read, \
	33	.open = mac80211_open_file_generic, \
	34	}
	35
	36	#define KEY_FILE(name, format) \
	37	KEY_READ_##format(name) \
	38	KEY_OPS(name)
	39
8f20fc24 JB	40	#define KEY_CONF_READ(name, buflen, format_string) \
	41	KEY_READ(conf_##name, conf.name, buflen, format_string)
	42	#define KEY_CONF_READ_D(name) KEY_CONF_READ(name, 20, "%d\n")
8f20fc24 JB	43
	44	#define KEY_CONF_OPS(name) \
	45	static const struct file_operations key_ ##name## _ops = { \
	46	.read = key_conf_##name##_read, \
	47	.open = mac80211_open_file_generic, \
	48	}
	49
	50	#define KEY_CONF_FILE(name, format) \
	51	KEY_CONF_READ_##format(name) \
	52	KEY_CONF_OPS(name)
	53
	54	KEY_CONF_FILE(keylen, D);
	55	KEY_CONF_FILE(keyidx, D);
	56	KEY_CONF_FILE(hw_key_idx, D);
11a843b7	57	KEY_FILE(flags, X);
e9f207f0	58	KEY_FILE(tx_rx_count, D);
e7a64f12 JB	59	KEY_READ(ifindex, sdata->dev->ifindex, 20, "%d\n");
e7a64f12 JB	60	KEY_OPS(ifindex);
e9f207f0 JB	61
	62	static ssize_t key_algorithm_read(struct file *file,
	63	char __user *userbuf,
	64	size_t count, loff_t *ppos)
	65	{
	66	char *alg;
	67	struct ieee80211_key *key = file->private_data;
	68
8f20fc24	69	switch (key->conf.alg) {
e9f207f0 JB	70	case ALG_WEP:
	71	alg = "WEP\n";
	72	break;
	73	case ALG_TKIP:
	74	alg = "TKIP\n";
	75	break;
	76	case ALG_CCMP:
	77	alg = "CCMP\n";
	78	break;
	79	default:
	80	return 0;
	81	}
	82	return simple_read_from_buffer(userbuf, count, ppos, alg, strlen(alg));
	83	}
	84	KEY_OPS(algorithm);
	85
	86	static ssize_t key_tx_spec_read(struct file file, char __user userbuf,
	87	size_t count, loff_t *ppos)
	88	{
	89	const u8 *tpn;
	90	char buf[20];
	91	int len;
	92	struct ieee80211_key *key = file->private_data;
	93
8f20fc24	94	switch (key->conf.alg) {
e9f207f0 JB	95	case ALG_WEP:
e9f207f0 JB	96	len = scnprintf(buf, sizeof(buf), "\n");
50339a67	97	break;
e9f207f0 JB	98	case ALG_TKIP:
e9f207f0 JB	99	len = scnprintf(buf, sizeof(buf), "%08x %04x\n",
b0f76b33 HH	100	key->u.tkip.tx.iv32,
b0f76b33 HH	101	key->u.tkip.tx.iv16);
50339a67	102	break;
e9f207f0 JB	103	case ALG_CCMP:
	104	tpn = key->u.ccmp.tx_pn;
	105	len = scnprintf(buf, sizeof(buf), "%02x%02x%02x%02x%02x%02x\n",
	106	tpn[0], tpn[1], tpn[2], tpn[3], tpn[4], tpn[5]);
50339a67	107	break;
e9f207f0 JB	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
8f20fc24	123	switch (key->conf.alg) {
e9f207f0 JB	124	case ALG_WEP:
e9f207f0 JB	125	len = scnprintf(buf, sizeof(buf), "\n");
50339a67	126	break;
e9f207f0 JB	127	case ALG_TKIP:
	128	for (i = 0; i < NUM_RX_DATA_QUEUES; i++)
	129	p += scnprintf(p, sizeof(buf)+buf-p,
	130	"%08x %04x\n",
b0f76b33 HH	131	key->u.tkip.rx[i].iv32,
b0f76b33 HH	132	key->u.tkip.rx[i].iv16);
e9f207f0	133	len = p - buf;
50339a67	134	break;
e9f207f0 JB	135	case ALG_CCMP:
	136	for (i = 0; i < NUM_RX_DATA_QUEUES; i++) {
	137	rpn = key->u.ccmp.rx_pn[i];
	138	p += scnprintf(p, sizeof(buf)+buf-p,
	139	"%02x%02x%02x%02x%02x%02x\n",
	140	rpn[0], rpn[1], rpn[2],
	141	rpn[3], rpn[4], rpn[5]);
	142	}
	143	len = p - buf;
50339a67	144	break;
e9f207f0 JB	145	default:
	146	return 0;
	147	}
	148	return simple_read_from_buffer(userbuf, count, ppos, buf, len);
	149	}
	150	KEY_OPS(rx_spec);
	151
	152	static ssize_t key_replays_read(struct file file, char __user userbuf,
	153	size_t count, loff_t *ppos)
	154	{
	155	struct ieee80211_key *key = file->private_data;
	156	char buf[20];
	157	int len;
	158
8f20fc24	159	if (key->conf.alg != ALG_CCMP)
e9f207f0 JB	160	return 0;
	161	len = scnprintf(buf, sizeof(buf), "%u\n", key->u.ccmp.replays);
	162	return simple_read_from_buffer(userbuf, count, ppos, buf, len);
	163	}
	164	KEY_OPS(replays);
	165
	166	static ssize_t key_key_read(struct file file, char __user userbuf,
	167	size_t count, loff_t *ppos)
	168	{
	169	struct ieee80211_key *key = file->private_data;
8f20fc24	170	int i, res, bufsize = 2 * key->conf.keylen + 2;
e9f207f0 JB	171	char *buf = kmalloc(bufsize, GFP_KERNEL);
	172	char *p = buf;
	173
8f20fc24 JB	174	for (i = 0; i < key->conf.keylen; i++)
8f20fc24 JB	175	p += scnprintf(p, bufsize + buf - p, "%02x", key->conf.key[i]);
e9f207f0 JB	176	p += scnprintf(p, bufsize+buf-p, "\n");
	177	res = simple_read_from_buffer(userbuf, count, ppos, buf, p - buf);
	178	kfree(buf);
	179	return res;
	180	}
	181	KEY_OPS(key);
	182
	183	#define DEBUGFS_ADD(name) \
	184	key->debugfs.name = debugfs_create_file(#name, 0400,\
	185	key->debugfs.dir, key, &key_##name##_ops);
	186
3b96766f JB	187	void ieee80211_debugfs_key_add(struct ieee80211_key *key)
3b96766f JB	188	{
50339a67	189	static int keycount;
3b96766f JB	190	char buf[50];
	191	DECLARE_MAC_BUF(mac);
	192	struct sta_info *sta;
e9f207f0	193
3b96766f	194	if (!key->local->debugfs.keys)
e9f207f0 JB	195	return;
e9f207f0 JB	196
50339a67	197	sprintf(buf, "%d", keycount);
d9c58f30	198	key->debugfs.cnt = keycount;
50339a67	199	keycount++;
e9f207f0	200	key->debugfs.dir = debugfs_create_dir(buf,
3b96766f	201	key->local->debugfs.keys);
e9f207f0 JB	202
	203	if (!key->debugfs.dir)
	204	return;
	205
3b96766f JB	206	rcu_read_lock();
	207	sta = rcu_dereference(key->sta);
	208	if (sta)
	209	sprintf(buf, "../../stations/%s", print_mac(mac, sta->addr));
	210	rcu_read_unlock();
	211
	212	/* using sta as a boolean is fine outside RCU lock */
	213	if (sta)
	214	key->debugfs.stalink =
	215	debugfs_create_symlink("station", key->debugfs.dir, buf);
	216
e9f207f0	217	DEBUGFS_ADD(keylen);
8f20fc24	218	DEBUGFS_ADD(flags);
e9f207f0 JB	219	DEBUGFS_ADD(keyidx);
	220	DEBUGFS_ADD(hw_key_idx);
	221	DEBUGFS_ADD(tx_rx_count);
	222	DEBUGFS_ADD(algorithm);
	223	DEBUGFS_ADD(tx_spec);
	224	DEBUGFS_ADD(rx_spec);
	225	DEBUGFS_ADD(replays);
	226	DEBUGFS_ADD(key);
e7a64f12	227	DEBUGFS_ADD(ifindex);
e9f207f0 JB	228	};
	229
	230	#define DEBUGFS_DEL(name) \
	231	debugfs_remove(key->debugfs.name); key->debugfs.name = NULL;
	232
	233	void ieee80211_debugfs_key_remove(struct ieee80211_key *key)
	234	{
	235	if (!key)
	236	return;
	237
	238	DEBUGFS_DEL(keylen);
8f20fc24	239	DEBUGFS_DEL(flags);
e9f207f0 JB	240	DEBUGFS_DEL(keyidx);
	241	DEBUGFS_DEL(hw_key_idx);
	242	DEBUGFS_DEL(tx_rx_count);
	243	DEBUGFS_DEL(algorithm);
	244	DEBUGFS_DEL(tx_spec);
	245	DEBUGFS_DEL(rx_spec);
	246	DEBUGFS_DEL(replays);
	247	DEBUGFS_DEL(key);
e7a64f12	248	DEBUGFS_DEL(ifindex);
e9f207f0 JB	249
	250	debugfs_remove(key->debugfs.stalink);
	251	key->debugfs.stalink = NULL;
	252	debugfs_remove(key->debugfs.dir);
	253	key->debugfs.dir = NULL;
	254	}
	255	void ieee80211_debugfs_key_add_default(struct ieee80211_sub_if_data *sdata)
	256	{
	257	char buf[50];
78520cad	258	struct ieee80211_key *key;
e9f207f0 JB	259
	260	if (!sdata->debugfsdir)
	261	return;
	262
78520cad JB	263	/* this is running under the key lock */
	264
	265	key = sdata->default_key;
	266	if (key) {
	267	sprintf(buf, "../keys/%d", key->debugfs.cnt);
	268	sdata->debugfs.default_key =
	269	debugfs_create_symlink("default_key",
	270	sdata->debugfsdir, buf);
	271	} else
	272	ieee80211_debugfs_key_remove_default(sdata);
e9f207f0	273	}
78520cad	274
e9f207f0 JB	275	void ieee80211_debugfs_key_remove_default(struct ieee80211_sub_if_data *sdata)
	276	{
	277	if (!sdata)
	278	return;
	279
	280	debugfs_remove(sdata->debugfs.default_key);
	281	sdata->debugfs.default_key = NULL;
	282	}
e9f207f0 JB	283
	284	void ieee80211_debugfs_key_sta_del(struct ieee80211_key *key,
	285	struct sta_info *sta)
	286	{
	287	debugfs_remove(key->debugfs.stalink);
	288	key->debugfs.stalink = NULL;
	289	}