net/mac80211/debugfs_key.c - linux - Git at Google

 // SPDX-License-Identifier: GPL-2.0-only
 /*
  * Copyright 2003-2005	Devicescape Software, Inc.
  * Copyright (c) 2006	Jiri Benc <jbenc@suse.cz>
  * Copyright 2007	Johannes Berg <johannes@sipsolutions.net>
  * Copyright (C) 2015	Intel Deutschland GmbH
  * Copyright (C) 2021   Intel Corporation
  */

 #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, format_string)				\
 static ssize_t key_##name##_read(struct file *file,			\
 				 char __user *userbuf,			\
 				 size_t count, loff_t *ppos)		\
 {									\
 	struct ieee80211_key *key = file->private_data;			\
 	return mac80211_format_buffer(userbuf, count, ppos, 		\
 				      format_string, key->prop);	\
 }
 #define KEY_READ_X(name) KEY_READ(name, name, "0x%x\n")

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

 #define KEY_OPS_W(name)							\
 static const struct file_operations key_ ##name## _ops = {		\
 	.read = key_##name##_read,					\
 	.write = key_##name##_write,					\
 	.open = simple_open,						\
 	.llseek = generic_file_llseek,					\
 }

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

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

 #define KEY_CONF_OPS(name)						\
 static const struct file_operations key_ ##name## _ops = {		\
 	.read = key_conf_##name##_read,					\
 	.open = simple_open,						\
 	.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_READ(ifindex, sdata->name, "%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_write(struct file *file, const char __user *userbuf,
 				 size_t count, loff_t *ppos)
 {
 	struct ieee80211_key *key = file->private_data;
 	u64 pn;
 	int ret;

 	switch (key->conf.cipher) {
 	case WLAN_CIPHER_SUITE_WEP40:
 	case WLAN_CIPHER_SUITE_WEP104:
 		return -EINVAL;
 	case WLAN_CIPHER_SUITE_TKIP:
 		/* not supported yet */
 		return -EOPNOTSUPP;
 	case WLAN_CIPHER_SUITE_CCMP:
 	case WLAN_CIPHER_SUITE_CCMP_256:
 	case WLAN_CIPHER_SUITE_AES_CMAC:
 	case WLAN_CIPHER_SUITE_BIP_CMAC_256:
 	case WLAN_CIPHER_SUITE_BIP_GMAC_128:
 	case WLAN_CIPHER_SUITE_BIP_GMAC_256:
 	case WLAN_CIPHER_SUITE_GCMP:
 	case WLAN_CIPHER_SUITE_GCMP_256:
 		ret = kstrtou64_from_user(userbuf, count, 16, &pn);
 		if (ret)
 			return ret;
 		/* PN is a 48-bit counter */
 		if (pn >= (1ULL << 48))
 			return -ERANGE;
 		atomic64_set(&key->conf.tx_pn, pn);
 		return count;
 	default:
 		return 0;
 	}
 }

 static ssize_t key_tx_spec_read(struct file *file, char __user *userbuf,
 				size_t count, loff_t *ppos)
 {
 	u64 pn;
 	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:
 		pn = atomic64_read(&key->conf.tx_pn);
 		len = scnprintf(buf, sizeof(buf), "%08x %04x\n",
 				TKIP_PN_TO_IV32(pn),
 				TKIP_PN_TO_IV16(pn));
 		break;
 	case WLAN_CIPHER_SUITE_CCMP:
 	case WLAN_CIPHER_SUITE_CCMP_256:
 	case WLAN_CIPHER_SUITE_AES_CMAC:
 	case WLAN_CIPHER_SUITE_BIP_CMAC_256:
 	case WLAN_CIPHER_SUITE_BIP_GMAC_128:
 	case WLAN_CIPHER_SUITE_BIP_GMAC_256:
 	case WLAN_CIPHER_SUITE_GCMP:
 	case WLAN_CIPHER_SUITE_GCMP_256:
 		pn = atomic64_read(&key->conf.tx_pn);
 		len = scnprintf(buf, sizeof(buf), "%02x%02x%02x%02x%02x%02x\n",
 				(u8)(pn >> 40), (u8)(pn >> 32), (u8)(pn >> 24),
 				(u8)(pn >> 16), (u8)(pn >> 8), (u8)pn);
 		break;
 	default:
 		return 0;
 	}
 	return simple_read_from_buffer(userbuf, count, ppos, buf, len);
 }
 KEY_OPS_W(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*IEEE80211_NUM_TIDS+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 < IEEE80211_NUM_TIDS; 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:
 	case WLAN_CIPHER_SUITE_CCMP_256:
 		for (i = 0; i < IEEE80211_NUM_TIDS + 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:
 	case WLAN_CIPHER_SUITE_BIP_CMAC_256:
 		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;
 	case WLAN_CIPHER_SUITE_BIP_GMAC_128:
 	case WLAN_CIPHER_SUITE_BIP_GMAC_256:
 		rpn = key->u.aes_gmac.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;
 	case WLAN_CIPHER_SUITE_GCMP:
 	case WLAN_CIPHER_SUITE_GCMP_256:
 		for (i = 0; i < IEEE80211_NUM_TIDS + 1; i++) {
 			rpn = key->u.gcmp.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;

 	switch (key->conf.cipher) {
 	case WLAN_CIPHER_SUITE_CCMP:
 	case WLAN_CIPHER_SUITE_CCMP_256:
 		len = scnprintf(buf, sizeof(buf), "%u\n", key->u.ccmp.replays);
 		break;
 	case WLAN_CIPHER_SUITE_AES_CMAC:
 	case WLAN_CIPHER_SUITE_BIP_CMAC_256:
 		len = scnprintf(buf, sizeof(buf), "%u\n",
 				key->u.aes_cmac.replays);
 		break;
 	case WLAN_CIPHER_SUITE_BIP_GMAC_128:
 	case WLAN_CIPHER_SUITE_BIP_GMAC_256:
 		len = scnprintf(buf, sizeof(buf), "%u\n",
 				key->u.aes_gmac.replays);
 		break;
 	case WLAN_CIPHER_SUITE_GCMP:
 	case WLAN_CIPHER_SUITE_GCMP_256:
 		len = scnprintf(buf, sizeof(buf), "%u\n", key->u.gcmp.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:
 	case WLAN_CIPHER_SUITE_BIP_CMAC_256:
 		len = scnprintf(buf, sizeof(buf), "%u\n",
 				key->u.aes_cmac.icverrors);
 		break;
 	case WLAN_CIPHER_SUITE_BIP_GMAC_128:
 	case WLAN_CIPHER_SUITE_BIP_GMAC_256:
 		len = scnprintf(buf, sizeof(buf), "%u\n",
 				key->u.aes_gmac.icverrors);
 		break;
 	default:
 		return 0;
 	}
 	return simple_read_from_buffer(userbuf, count, ppos, buf, len);
 }
 KEY_OPS(icverrors);

 static ssize_t key_mic_failures_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.cipher != WLAN_CIPHER_SUITE_TKIP)
 		return -EINVAL;

 	len = scnprintf(buf, sizeof(buf), "%u\n", key->u.tkip.mic_failures);

 	return simple_read_from_buffer(userbuf, count, ppos, buf, len);
 }
 KEY_OPS(mic_failures);

 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)
 #define DEBUGFS_ADD_W(name) \
 	debugfs_create_file(#name, 0600, key->debugfs.dir, \
 			    key, &key_##name##_ops);

 void ieee80211_debugfs_key_add(struct ieee80211_key *key)
 {
 	static int keycount;
 	char buf[100];
 	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);

 	sta = key->sta;
 	if (sta) {
 		sprintf(buf, "../../netdev:%s/stations/%pM",
 			sta->sdata->name, sta->sta.addr);
 		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(algorithm);
 	DEBUGFS_ADD_W(tx_spec);
 	DEBUGFS_ADD(rx_spec);
 	DEBUGFS_ADD(replays);
 	DEBUGFS_ADD(icverrors);
 	DEBUGFS_ADD(mic_failures);
 	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_update_default(struct ieee80211_sub_if_data *sdata)
 {
 	char buf[50];
 	struct ieee80211_key *key;

 	if (!sdata->vif.debugfs_dir)
 		return;

 	lockdep_assert_held(&sdata->local->key_mtx);

 	debugfs_remove(sdata->debugfs.default_unicast_key);
 	sdata->debugfs.default_unicast_key = NULL;

 	if (sdata->default_unicast_key) {
 		key = key_mtx_dereference(sdata->local,
 					  sdata->default_unicast_key);
 		sprintf(buf, "../keys/%d", key->debugfs.cnt);
 		sdata->debugfs.default_unicast_key =
 			debugfs_create_symlink("default_unicast_key",
 					       sdata->vif.debugfs_dir, buf);
 	}

 	debugfs_remove(sdata->debugfs.default_multicast_key);
 	sdata->debugfs.default_multicast_key = NULL;

 	if (sdata->default_multicast_key) {
 		key = key_mtx_dereference(sdata->local,
 					  sdata->default_multicast_key);
 		sprintf(buf, "../keys/%d", key->debugfs.cnt);
 		sdata->debugfs.default_multicast_key =
 			debugfs_create_symlink("default_multicast_key",
 					       sdata->vif.debugfs_dir, buf);
 	}
 }

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

 	if (!sdata->vif.debugfs_dir)
 		return;

 	key = key_mtx_dereference(sdata->local,
 				  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->vif.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_add_beacon_default(struct ieee80211_sub_if_data *sdata)
 {
 	char buf[50];
 	struct ieee80211_key *key;

 	if (!sdata->vif.debugfs_dir)
 		return;

 	key = key_mtx_dereference(sdata->local,
 				  sdata->default_beacon_key);
 	if (key) {
 		sprintf(buf, "../keys/%d", key->debugfs.cnt);
 		sdata->debugfs.default_beacon_key =
 			debugfs_create_symlink("default_beacon_key",
 					       sdata->vif.debugfs_dir, buf);
 	} else {
 		ieee80211_debugfs_key_remove_beacon_default(sdata);
 	}
 }

 void
 ieee80211_debugfs_key_remove_beacon_default(struct ieee80211_sub_if_data *sdata)
 {
 	if (!sdata)
 		return;

 	debugfs_remove(sdata->debugfs.default_beacon_key);
 	sdata->debugfs.default_beacon_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;
 }
	// SPDX-License-Identifier: GPL-2.0-only
	/*
	* Copyright 2003-2005 Devicescape Software, Inc.
	* Copyright (c) 2006 Jiri Benc <jbenc@suse.cz>
	* Copyright 2007 Johannes Berg <johannes@sipsolutions.net>
	* Copyright (C) 2015 Intel Deutschland GmbH
	* Copyright (C) 2021 Intel Corporation
	*/

	#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, format_string) \
	static ssize_t key_##name##_read(struct file *file, \
	char __user *userbuf, \
	size_t count, loff_t *ppos) \
	{ \
	struct ieee80211_key *key = file->private_data; \
	return mac80211_format_buffer(userbuf, count, ppos, \
	format_string, key->prop); \
	}
	#define KEY_READ_X(name) KEY_READ(name, name, "0x%x\n")

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

	#define KEY_OPS_W(name) \
	static const struct file_operations key_ ##name## _ops = { \
	.read = key_##name##_read, \
	.write = key_##name##_write, \
	.open = simple_open, \
	.llseek = generic_file_llseek, \
	}

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

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

	#define KEY_CONF_OPS(name) \
	static const struct file_operations key_ ##name## _ops = { \
	.read = key_conf_##name##_read, \
	.open = simple_open, \
	.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_READ(ifindex, sdata->name, "%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_write(struct file file, const char __user userbuf,
	size_t count, loff_t *ppos)
	{
	struct ieee80211_key *key = file->private_data;
	u64 pn;
	int ret;

	switch (key->conf.cipher) {
	case WLAN_CIPHER_SUITE_WEP40:
	case WLAN_CIPHER_SUITE_WEP104:
	return -EINVAL;
	case WLAN_CIPHER_SUITE_TKIP:
	/* not supported yet */
	return -EOPNOTSUPP;
	case WLAN_CIPHER_SUITE_CCMP:
	case WLAN_CIPHER_SUITE_CCMP_256:
	case WLAN_CIPHER_SUITE_AES_CMAC:
	case WLAN_CIPHER_SUITE_BIP_CMAC_256:
	case WLAN_CIPHER_SUITE_BIP_GMAC_128:
	case WLAN_CIPHER_SUITE_BIP_GMAC_256:
	case WLAN_CIPHER_SUITE_GCMP:
	case WLAN_CIPHER_SUITE_GCMP_256:
	ret = kstrtou64_from_user(userbuf, count, 16, &pn);
	if (ret)
	return ret;
	/* PN is a 48-bit counter */
	if (pn >= (1ULL << 48))
	return -ERANGE;
	atomic64_set(&key->conf.tx_pn, pn);
	return count;
	default:
	return 0;
	}
	}

	static ssize_t key_tx_spec_read(struct file file, char __user userbuf,
	size_t count, loff_t *ppos)
	{
	u64 pn;
	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:
	pn = atomic64_read(&key->conf.tx_pn);
	len = scnprintf(buf, sizeof(buf), "%08x %04x\n",
	TKIP_PN_TO_IV32(pn),
	TKIP_PN_TO_IV16(pn));
	break;
	case WLAN_CIPHER_SUITE_CCMP:
	case WLAN_CIPHER_SUITE_CCMP_256:
	case WLAN_CIPHER_SUITE_AES_CMAC:
	case WLAN_CIPHER_SUITE_BIP_CMAC_256:
	case WLAN_CIPHER_SUITE_BIP_GMAC_128:
	case WLAN_CIPHER_SUITE_BIP_GMAC_256:
	case WLAN_CIPHER_SUITE_GCMP:
	case WLAN_CIPHER_SUITE_GCMP_256:
	pn = atomic64_read(&key->conf.tx_pn);
	len = scnprintf(buf, sizeof(buf), "%02x%02x%02x%02x%02x%02x\n",
	(u8)(pn >> 40), (u8)(pn >> 32), (u8)(pn >> 24),
	(u8)(pn >> 16), (u8)(pn >> 8), (u8)pn);
	break;
	default:
	return 0;
	}
	return simple_read_from_buffer(userbuf, count, ppos, buf, len);
	}
	KEY_OPS_W(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[14IEEE80211_NUM_TIDS+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 < IEEE80211_NUM_TIDS; 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:
	case WLAN_CIPHER_SUITE_CCMP_256:
	for (i = 0; i < IEEE80211_NUM_TIDS + 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:
	case WLAN_CIPHER_SUITE_BIP_CMAC_256:
	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;
	case WLAN_CIPHER_SUITE_BIP_GMAC_128:
	case WLAN_CIPHER_SUITE_BIP_GMAC_256:
	rpn = key->u.aes_gmac.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;
	case WLAN_CIPHER_SUITE_GCMP:
	case WLAN_CIPHER_SUITE_GCMP_256:
	for (i = 0; i < IEEE80211_NUM_TIDS + 1; i++) {
	rpn = key->u.gcmp.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;

	switch (key->conf.cipher) {
	case WLAN_CIPHER_SUITE_CCMP:
	case WLAN_CIPHER_SUITE_CCMP_256:
	len = scnprintf(buf, sizeof(buf), "%u\n", key->u.ccmp.replays);
	break;
	case WLAN_CIPHER_SUITE_AES_CMAC:
	case WLAN_CIPHER_SUITE_BIP_CMAC_256:
	len = scnprintf(buf, sizeof(buf), "%u\n",
	key->u.aes_cmac.replays);
	break;
	case WLAN_CIPHER_SUITE_BIP_GMAC_128:
	case WLAN_CIPHER_SUITE_BIP_GMAC_256:
	len = scnprintf(buf, sizeof(buf), "%u\n",
	key->u.aes_gmac.replays);
	break;
	case WLAN_CIPHER_SUITE_GCMP:
	case WLAN_CIPHER_SUITE_GCMP_256:
	len = scnprintf(buf, sizeof(buf), "%u\n", key->u.gcmp.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:
	case WLAN_CIPHER_SUITE_BIP_CMAC_256:
	len = scnprintf(buf, sizeof(buf), "%u\n",
	key->u.aes_cmac.icverrors);
	break;
	case WLAN_CIPHER_SUITE_BIP_GMAC_128:
	case WLAN_CIPHER_SUITE_BIP_GMAC_256:
	len = scnprintf(buf, sizeof(buf), "%u\n",
	key->u.aes_gmac.icverrors);
	break;
	default:
	return 0;
	}
	return simple_read_from_buffer(userbuf, count, ppos, buf, len);
	}
	KEY_OPS(icverrors);

	static ssize_t key_mic_failures_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.cipher != WLAN_CIPHER_SUITE_TKIP)
	return -EINVAL;

	len = scnprintf(buf, sizeof(buf), "%u\n", key->u.tkip.mic_failures);

	return simple_read_from_buffer(userbuf, count, ppos, buf, len);
	}
	KEY_OPS(mic_failures);

	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)
	#define DEBUGFS_ADD_W(name) \
	debugfs_create_file(#name, 0600, key->debugfs.dir, \
	key, &key_##name##_ops);

	void ieee80211_debugfs_key_add(struct ieee80211_key *key)
	{
	static int keycount;
	char buf[100];
	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);

	sta = key->sta;
	if (sta) {
	sprintf(buf, "../../netdev:%s/stations/%pM",
	sta->sdata->name, sta->sta.addr);
	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(algorithm);
	DEBUGFS_ADD_W(tx_spec);
	DEBUGFS_ADD(rx_spec);
	DEBUGFS_ADD(replays);
	DEBUGFS_ADD(icverrors);
	DEBUGFS_ADD(mic_failures);
	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_update_default(struct ieee80211_sub_if_data *sdata)
	{
	char buf[50];
	struct ieee80211_key *key;

	if (!sdata->vif.debugfs_dir)
	return;

	lockdep_assert_held(&sdata->local->key_mtx);

	debugfs_remove(sdata->debugfs.default_unicast_key);
	sdata->debugfs.default_unicast_key = NULL;

	if (sdata->default_unicast_key) {
	key = key_mtx_dereference(sdata->local,
	sdata->default_unicast_key);
	sprintf(buf, "../keys/%d", key->debugfs.cnt);
	sdata->debugfs.default_unicast_key =
	debugfs_create_symlink("default_unicast_key",
	sdata->vif.debugfs_dir, buf);
	}

	debugfs_remove(sdata->debugfs.default_multicast_key);
	sdata->debugfs.default_multicast_key = NULL;

	if (sdata->default_multicast_key) {
	key = key_mtx_dereference(sdata->local,
	sdata->default_multicast_key);
	sprintf(buf, "../keys/%d", key->debugfs.cnt);
	sdata->debugfs.default_multicast_key =
	debugfs_create_symlink("default_multicast_key",
	sdata->vif.debugfs_dir, buf);
	}
	}

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

	if (!sdata->vif.debugfs_dir)
	return;

	key = key_mtx_dereference(sdata->local,
	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->vif.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_add_beacon_default(struct ieee80211_sub_if_data *sdata)
	{
	char buf[50];
	struct ieee80211_key *key;

	if (!sdata->vif.debugfs_dir)
	return;

	key = key_mtx_dereference(sdata->local,
	sdata->default_beacon_key);
	if (key) {
	sprintf(buf, "../keys/%d", key->debugfs.cnt);
	sdata->debugfs.default_beacon_key =
	debugfs_create_symlink("default_beacon_key",
	sdata->vif.debugfs_dir, buf);
	} else {
	ieee80211_debugfs_key_remove_beacon_default(sdata);
	}
	}

	void
	ieee80211_debugfs_key_remove_beacon_default(struct ieee80211_sub_if_data *sdata)
	{
	if (!sdata)
	return;

	debugfs_remove(sdata->debugfs.default_beacon_key);
	sdata->debugfs.default_beacon_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;
	}