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Commit e9f207f0 authored by Jiri Benc's avatar Jiri Benc Committed by David S. Miller
Browse files

[MAC80211]: Add debugfs attributes. 



Export various mac80211 internal variables through debugfs.

Signed-off-by: default avatarJiri Benc <jbenc@suse.cz>
Signed-off-by: default avatarJohn W. Linville <linville@tuxdriver.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent f0706e82

net/mac80211/Kconfig

+9 −0
Original line number Diff line number Diff line
@@ -20,6 +20,15 @@ config MAC80211_LEDS 
	This option enables a few LED triggers for different

	packet receive/transmit events.



config MAC80211_DEBUGFS

	bool "Export mac80211 internals in DebugFS"

	depends on MAC80211 && DEBUG_FS

	---help---

	  Select this to see extensive information about

	  the internal state of mac80211 in debugfs.



	  Say N unless you know you need this.



config MAC80211_DEBUG

	bool "Enable debugging output"

	depends on MAC80211

net/mac80211/Makefile

+1 −0
Original line number Diff line number Diff line 
obj-$(CONFIG_MAC80211) += mac80211.o rc80211_simple.o



mac80211-objs-$(CONFIG_MAC80211_LEDS) += ieee80211_led.o

mac80211-objs-$(CONFIG_MAC80211_DEBUGFS) += debugfs.o debugfs_sta.o debugfs_netdev.o debugfs_key.o



mac80211-objs := \

	ieee80211.o \

net/mac80211/debugfs.c

0 → 100644
+433 −0
Original line number Diff line number Diff line 
/*

 * mac80211 debugfs for wireless PHYs

 *

 * Copyright 2007	Johannes Berg <johannes@sipsolutions.net>

 *

 * GPLv2

 *

 */



#include <linux/debugfs.h>

#include <linux/rtnetlink.h>

#include "ieee80211_i.h"

#include "ieee80211_rate.h"

#include "debugfs.h"



int mac80211_open_file_generic(struct inode *inode, struct file *file)

{

	file->private_data = inode->i_private;

	return 0;

}



static const char *ieee80211_mode_str(int mode)

{

	switch (mode) {

	case MODE_IEEE80211A:

		return "IEEE 802.11a";

	case MODE_IEEE80211B:

		return "IEEE 802.11b";

	case MODE_IEEE80211G:

		return "IEEE 802.11g";

	case MODE_ATHEROS_TURBO:

		return "Atheros Turbo (5 GHz)";

	default:

		return "UNKNOWN";

	}

}



static ssize_t modes_read(struct file *file, char __user *userbuf,

			  size_t count, loff_t *ppos)

{

	struct ieee80211_local *local = file->private_data;

	struct ieee80211_hw_mode *mode;

	char buf[150], *p = buf;



	/* FIXME: locking! */

	list_for_each_entry(mode, &local->modes_list, list) {

		p += scnprintf(p, sizeof(buf)+buf-p,

			       "%s\n", ieee80211_mode_str(mode->mode));

	}



	return simple_read_from_buffer(userbuf, count, ppos, buf, p-buf);

}



static const struct file_operations modes_ops = {

	.read = modes_read,

	.open = mac80211_open_file_generic,

};



#define DEBUGFS_READONLY_FILE(name, buflen, fmt, value...)		\

static ssize_t name## _read(struct file *file, char __user *userbuf,	\

			    size_t count, loff_t *ppos)			\

{									\

	struct ieee80211_local *local = file->private_data;		\

	char buf[buflen];						\

	int res;							\

									\

	res = scnprintf(buf, buflen, fmt "\n", ##value);		\

	return simple_read_from_buffer(userbuf, count, ppos, buf, res);	\

}									\

									\

static const struct file_operations name## _ops = {			\

	.read = name## _read,						\

	.open = mac80211_open_file_generic,				\

};



#define DEBUGFS_ADD(name)						\

	local->debugfs.name = debugfs_create_file(#name, 0444, phyd,	\

						  local, &name## _ops);



#define DEBUGFS_DEL(name)						\

	debugfs_remove(local->debugfs.name);				\

	local->debugfs.name = NULL;





DEBUGFS_READONLY_FILE(channel, 20, "%d",

		      local->hw.conf.channel);

DEBUGFS_READONLY_FILE(frequency, 20, "%d",

		      local->hw.conf.freq);

DEBUGFS_READONLY_FILE(radar_detect, 20, "%d",

		      local->hw.conf.radar_detect);

DEBUGFS_READONLY_FILE(antenna_sel_tx, 20, "%d",

		      local->hw.conf.antenna_sel_tx);

DEBUGFS_READONLY_FILE(antenna_sel_rx, 20, "%d",

		      local->hw.conf.antenna_sel_rx);

DEBUGFS_READONLY_FILE(bridge_packets, 20, "%d",

		      local->bridge_packets);

DEBUGFS_READONLY_FILE(key_tx_rx_threshold, 20, "%d",

		      local->key_tx_rx_threshold);

DEBUGFS_READONLY_FILE(rts_threshold, 20, "%d",

		      local->rts_threshold);

DEBUGFS_READONLY_FILE(fragmentation_threshold, 20, "%d",

		      local->fragmentation_threshold);

DEBUGFS_READONLY_FILE(short_retry_limit, 20, "%d",

		      local->short_retry_limit);

DEBUGFS_READONLY_FILE(long_retry_limit, 20, "%d",

		      local->long_retry_limit);

DEBUGFS_READONLY_FILE(total_ps_buffered, 20, "%d",

		      local->total_ps_buffered);

DEBUGFS_READONLY_FILE(mode, 20, "%s",

		      ieee80211_mode_str(local->hw.conf.phymode));

DEBUGFS_READONLY_FILE(wep_iv, 20, "%#06x",

		      local->wep_iv & 0xffffff);

DEBUGFS_READONLY_FILE(tx_power_reduction, 20, "%d.%d dBm",

		      local->hw.conf.tx_power_reduction / 10,

		      local->hw.conf.tx_power_reduction & 10);

DEBUGFS_READONLY_FILE(rate_ctrl_alg, 100, "%s",

		      local->rate_ctrl ? local->rate_ctrl->ops->name : "<unset>");



/* statistics stuff */



static inline int rtnl_lock_local(struct ieee80211_local *local)

{

	rtnl_lock();

	if (unlikely(local->reg_state != IEEE80211_DEV_REGISTERED)) {

		rtnl_unlock();

		return -ENODEV;

	}

	return 0;

}



#define DEBUGFS_STATS_FILE(name, buflen, fmt, value...)			\

	DEBUGFS_READONLY_FILE(stats_ ##name, buflen, fmt, ##value)



static ssize_t format_devstat_counter(struct ieee80211_local *local,

	char __user *userbuf,

	size_t count, loff_t *ppos,

	int (*printvalue)(struct ieee80211_low_level_stats *stats, char *buf,

			  int buflen))

{

	struct ieee80211_low_level_stats stats;

	char buf[20];

	int res;



	if (!local->ops->get_stats)

		return -EOPNOTSUPP;



	res = rtnl_lock_local(local);

	if (res)

		return res;



	res = local->ops->get_stats(local_to_hw(local), &stats);

	rtnl_unlock();

	if (!res)

		res = printvalue(&stats, buf, sizeof(buf));

	return simple_read_from_buffer(userbuf, count, ppos, buf, res);

}



#define DEBUGFS_DEVSTATS_FILE(name)					\

static int print_devstats_##name(struct ieee80211_low_level_stats *stats,\

				 char *buf, int buflen)			\

{									\

	return scnprintf(buf, buflen, "%u\n", stats->name);		\

}									\

static ssize_t stats_ ##name## _read(struct file *file,			\

				     char __user *userbuf,		\

				     size_t count, loff_t *ppos)	\

{									\

	return format_devstat_counter(file->private_data,		\

				      userbuf,				\

				      count,				\

				      ppos,				\

				      print_devstats_##name);		\

}									\

									\

static const struct file_operations stats_ ##name## _ops = {		\

	.read = stats_ ##name## _read,					\

	.open = mac80211_open_file_generic,				\

};



#define DEBUGFS_STATS_ADD(name)						\

	local->debugfs.stats.name = debugfs_create_file(#name, 0444, statsd,\

		local, &stats_ ##name## _ops);



#define DEBUGFS_STATS_DEL(name)						\

	debugfs_remove(local->debugfs.stats.name);			\

	local->debugfs.stats.name = NULL;



DEBUGFS_STATS_FILE(transmitted_fragment_count, 20, "%u",

		   local->dot11TransmittedFragmentCount);

DEBUGFS_STATS_FILE(multicast_transmitted_frame_count, 20, "%u",

		   local->dot11MulticastTransmittedFrameCount);

DEBUGFS_STATS_FILE(failed_count, 20, "%u",

		   local->dot11FailedCount);

DEBUGFS_STATS_FILE(retry_count, 20, "%u",

		   local->dot11RetryCount);

DEBUGFS_STATS_FILE(multiple_retry_count, 20, "%u",

		   local->dot11MultipleRetryCount);

DEBUGFS_STATS_FILE(frame_duplicate_count, 20, "%u",

		   local->dot11FrameDuplicateCount);

DEBUGFS_STATS_FILE(received_fragment_count, 20, "%u",

		   local->dot11ReceivedFragmentCount);

DEBUGFS_STATS_FILE(multicast_received_frame_count, 20, "%u",

		   local->dot11MulticastReceivedFrameCount);

DEBUGFS_STATS_FILE(transmitted_frame_count, 20, "%u",

		   local->dot11TransmittedFrameCount);

DEBUGFS_STATS_FILE(wep_undecryptable_count, 20, "%u",

		   local->dot11WEPUndecryptableCount);

#ifdef CONFIG_MAC80211_DEBUG_COUNTERS

DEBUGFS_STATS_FILE(tx_handlers_drop, 20, "%u",

		   local->tx_handlers_drop);

DEBUGFS_STATS_FILE(tx_handlers_queued, 20, "%u",

		   local->tx_handlers_queued);

DEBUGFS_STATS_FILE(tx_handlers_drop_unencrypted, 20, "%u",

		   local->tx_handlers_drop_unencrypted);

DEBUGFS_STATS_FILE(tx_handlers_drop_fragment, 20, "%u",

		   local->tx_handlers_drop_fragment);

DEBUGFS_STATS_FILE(tx_handlers_drop_wep, 20, "%u",

		   local->tx_handlers_drop_wep);

DEBUGFS_STATS_FILE(tx_handlers_drop_not_assoc, 20, "%u",

		   local->tx_handlers_drop_not_assoc);

DEBUGFS_STATS_FILE(tx_handlers_drop_unauth_port, 20, "%u",

		   local->tx_handlers_drop_unauth_port);

DEBUGFS_STATS_FILE(rx_handlers_drop, 20, "%u",

		   local->rx_handlers_drop);

DEBUGFS_STATS_FILE(rx_handlers_queued, 20, "%u",

		   local->rx_handlers_queued);

DEBUGFS_STATS_FILE(rx_handlers_drop_nullfunc, 20, "%u",

		   local->rx_handlers_drop_nullfunc);

DEBUGFS_STATS_FILE(rx_handlers_drop_defrag, 20, "%u",

		   local->rx_handlers_drop_defrag);

DEBUGFS_STATS_FILE(rx_handlers_drop_short, 20, "%u",

		   local->rx_handlers_drop_short);

DEBUGFS_STATS_FILE(rx_handlers_drop_passive_scan, 20, "%u",

		   local->rx_handlers_drop_passive_scan);

DEBUGFS_STATS_FILE(tx_expand_skb_head, 20, "%u",

		   local->tx_expand_skb_head);

DEBUGFS_STATS_FILE(tx_expand_skb_head_cloned, 20, "%u",

		   local->tx_expand_skb_head_cloned);

DEBUGFS_STATS_FILE(rx_expand_skb_head, 20, "%u",

		   local->rx_expand_skb_head);

DEBUGFS_STATS_FILE(rx_expand_skb_head2, 20, "%u",

		   local->rx_expand_skb_head2);

DEBUGFS_STATS_FILE(rx_handlers_fragments, 20, "%u",

		   local->rx_handlers_fragments);

DEBUGFS_STATS_FILE(tx_status_drop, 20, "%u",

		   local->tx_status_drop);



static ssize_t stats_wme_rx_queue_read(struct file *file,

				       char __user *userbuf,

				       size_t count, loff_t *ppos)

{

	struct ieee80211_local *local = file->private_data;

	char buf[NUM_RX_DATA_QUEUES*15], *p = buf;

	int i;



	for (i = 0; i < NUM_RX_DATA_QUEUES; i++)

		p += scnprintf(p, sizeof(buf)+buf-p,

			       "%u\n", local->wme_rx_queue[i]);



	return simple_read_from_buffer(userbuf, count, ppos, buf, p-buf);

}



static const struct file_operations stats_wme_rx_queue_ops = {

	.read = stats_wme_rx_queue_read,

	.open = mac80211_open_file_generic,

};



static ssize_t stats_wme_tx_queue_read(struct file *file,

				       char __user *userbuf,

				       size_t count, loff_t *ppos)

{

	struct ieee80211_local *local = file->private_data;

	char buf[NUM_TX_DATA_QUEUES*15], *p = buf;

	int i;



	for (i = 0; i < NUM_TX_DATA_QUEUES; i++)

		p += scnprintf(p, sizeof(buf)+buf-p,

			       "%u\n", local->wme_tx_queue[i]);



	return simple_read_from_buffer(userbuf, count, ppos, buf, p-buf);

}



static const struct file_operations stats_wme_tx_queue_ops = {

	.read = stats_wme_tx_queue_read,

	.open = mac80211_open_file_generic,

};

#endif



DEBUGFS_DEVSTATS_FILE(dot11ACKFailureCount);

DEBUGFS_DEVSTATS_FILE(dot11RTSFailureCount);

DEBUGFS_DEVSTATS_FILE(dot11FCSErrorCount);

DEBUGFS_DEVSTATS_FILE(dot11RTSSuccessCount);





void debugfs_hw_add(struct ieee80211_local *local)

{

	struct dentry *phyd = local->hw.wiphy->debugfsdir;

	struct dentry *statsd;



	if (!phyd)

		return;



	local->debugfs.stations = debugfs_create_dir("stations", phyd);

	local->debugfs.keys = debugfs_create_dir("keys", phyd);



	DEBUGFS_ADD(channel);

	DEBUGFS_ADD(frequency);

	DEBUGFS_ADD(radar_detect);

	DEBUGFS_ADD(antenna_sel_tx);

	DEBUGFS_ADD(antenna_sel_rx);

	DEBUGFS_ADD(bridge_packets);

	DEBUGFS_ADD(key_tx_rx_threshold);

	DEBUGFS_ADD(rts_threshold);

	DEBUGFS_ADD(fragmentation_threshold);

	DEBUGFS_ADD(short_retry_limit);

	DEBUGFS_ADD(long_retry_limit);

	DEBUGFS_ADD(total_ps_buffered);

	DEBUGFS_ADD(mode);

	DEBUGFS_ADD(wep_iv);

	DEBUGFS_ADD(tx_power_reduction);

	DEBUGFS_ADD(modes);



	statsd = debugfs_create_dir("statistics", phyd);

	local->debugfs.statistics = statsd;



	/* if the dir failed, don't put all the other things into the root! */

	if (!statsd)

		return;



	DEBUGFS_STATS_ADD(transmitted_fragment_count);

	DEBUGFS_STATS_ADD(multicast_transmitted_frame_count);

	DEBUGFS_STATS_ADD(failed_count);

	DEBUGFS_STATS_ADD(retry_count);

	DEBUGFS_STATS_ADD(multiple_retry_count);

	DEBUGFS_STATS_ADD(frame_duplicate_count);

	DEBUGFS_STATS_ADD(received_fragment_count);

	DEBUGFS_STATS_ADD(multicast_received_frame_count);

	DEBUGFS_STATS_ADD(transmitted_frame_count);

	DEBUGFS_STATS_ADD(wep_undecryptable_count);

#ifdef CONFIG_MAC80211_DEBUG_COUNTERS

	DEBUGFS_STATS_ADD(tx_handlers_drop);

	DEBUGFS_STATS_ADD(tx_handlers_queued);

	DEBUGFS_STATS_ADD(tx_handlers_drop_unencrypted);

	DEBUGFS_STATS_ADD(tx_handlers_drop_fragment);

	DEBUGFS_STATS_ADD(tx_handlers_drop_wep);

	DEBUGFS_STATS_ADD(tx_handlers_drop_not_assoc);

	DEBUGFS_STATS_ADD(tx_handlers_drop_unauth_port);

	DEBUGFS_STATS_ADD(rx_handlers_drop);

	DEBUGFS_STATS_ADD(rx_handlers_queued);

	DEBUGFS_STATS_ADD(rx_handlers_drop_nullfunc);

	DEBUGFS_STATS_ADD(rx_handlers_drop_defrag);

	DEBUGFS_STATS_ADD(rx_handlers_drop_short);

	DEBUGFS_STATS_ADD(rx_handlers_drop_passive_scan);

	DEBUGFS_STATS_ADD(tx_expand_skb_head);

	DEBUGFS_STATS_ADD(tx_expand_skb_head_cloned);

	DEBUGFS_STATS_ADD(rx_expand_skb_head);

	DEBUGFS_STATS_ADD(rx_expand_skb_head2);

	DEBUGFS_STATS_ADD(rx_handlers_fragments);

	DEBUGFS_STATS_ADD(tx_status_drop);

	DEBUGFS_STATS_ADD(wme_tx_queue);

	DEBUGFS_STATS_ADD(wme_rx_queue);

#endif

	DEBUGFS_STATS_ADD(dot11ACKFailureCount);

	DEBUGFS_STATS_ADD(dot11RTSFailureCount);

	DEBUGFS_STATS_ADD(dot11FCSErrorCount);

	DEBUGFS_STATS_ADD(dot11RTSSuccessCount);

}



void debugfs_hw_del(struct ieee80211_local *local)

{

	DEBUGFS_DEL(channel);

	DEBUGFS_DEL(frequency);

	DEBUGFS_DEL(radar_detect);

	DEBUGFS_DEL(antenna_sel_tx);

	DEBUGFS_DEL(antenna_sel_rx);

	DEBUGFS_DEL(bridge_packets);

	DEBUGFS_DEL(key_tx_rx_threshold);

	DEBUGFS_DEL(rts_threshold);

	DEBUGFS_DEL(fragmentation_threshold);

	DEBUGFS_DEL(short_retry_limit);

	DEBUGFS_DEL(long_retry_limit);

	DEBUGFS_DEL(total_ps_buffered);

	DEBUGFS_DEL(mode);

	DEBUGFS_DEL(wep_iv);

	DEBUGFS_DEL(tx_power_reduction);

	DEBUGFS_DEL(modes);



	DEBUGFS_STATS_DEL(transmitted_fragment_count);

	DEBUGFS_STATS_DEL(multicast_transmitted_frame_count);

	DEBUGFS_STATS_DEL(failed_count);

	DEBUGFS_STATS_DEL(retry_count);

	DEBUGFS_STATS_DEL(multiple_retry_count);

	DEBUGFS_STATS_DEL(frame_duplicate_count);

	DEBUGFS_STATS_DEL(received_fragment_count);

	DEBUGFS_STATS_DEL(multicast_received_frame_count);

	DEBUGFS_STATS_DEL(transmitted_frame_count);

	DEBUGFS_STATS_DEL(wep_undecryptable_count);

	DEBUGFS_STATS_DEL(num_scans);

#ifdef CONFIG_MAC80211_DEBUG_COUNTERS

	DEBUGFS_STATS_DEL(tx_handlers_drop);

	DEBUGFS_STATS_DEL(tx_handlers_queued);

	DEBUGFS_STATS_DEL(tx_handlers_drop_unencrypted);

	DEBUGFS_STATS_DEL(tx_handlers_drop_fragment);

	DEBUGFS_STATS_DEL(tx_handlers_drop_wep);

	DEBUGFS_STATS_DEL(tx_handlers_drop_not_assoc);

	DEBUGFS_STATS_DEL(tx_handlers_drop_unauth_port);

	DEBUGFS_STATS_DEL(rx_handlers_drop);

	DEBUGFS_STATS_DEL(rx_handlers_queued);

	DEBUGFS_STATS_DEL(rx_handlers_drop_nullfunc);

	DEBUGFS_STATS_DEL(rx_handlers_drop_defrag);

	DEBUGFS_STATS_DEL(rx_handlers_drop_short);

	DEBUGFS_STATS_DEL(rx_handlers_drop_passive_scan);

	DEBUGFS_STATS_DEL(tx_expand_skb_head);

	DEBUGFS_STATS_DEL(tx_expand_skb_head_cloned);

	DEBUGFS_STATS_DEL(rx_expand_skb_head);

	DEBUGFS_STATS_DEL(rx_expand_skb_head2);

	DEBUGFS_STATS_DEL(rx_handlers_fragments);

	DEBUGFS_STATS_DEL(tx_status_drop);

	DEBUGFS_STATS_DEL(wme_tx_queue);

	DEBUGFS_STATS_DEL(wme_rx_queue);

#endif

	DEBUGFS_STATS_DEL(dot11ACKFailureCount);

	DEBUGFS_STATS_DEL(dot11RTSFailureCount);

	DEBUGFS_STATS_DEL(dot11FCSErrorCount);

	DEBUGFS_STATS_DEL(dot11RTSSuccessCount);



	debugfs_remove(local->debugfs.statistics);

	local->debugfs.statistics = NULL;

	debugfs_remove(local->debugfs.stations);

	local->debugfs.stations = NULL;

	debugfs_remove(local->debugfs.keys);

	local->debugfs.keys = NULL;

}

net/mac80211/debugfs.h

0 → 100644
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Original line number Diff line number Diff line 
#ifndef __MAC80211_DEBUGFS_H

#define __MAC80211_DEBUGFS_H



#ifdef CONFIG_MAC80211_DEBUGFS

extern void debugfs_hw_add(struct ieee80211_local *local);

extern void debugfs_hw_del(struct ieee80211_local *local);

extern int mac80211_open_file_generic(struct inode *inode, struct file *file);

#else

static inline void debugfs_hw_add(struct ieee80211_local *local)

{

	return;

}

static inline void debugfs_hw_del(struct ieee80211_local *local) {}

#endif



#endif /* __MAC80211_DEBUGFS_H */

net/mac80211/debugfs_key.c

0 → 100644
+252 −0
Original line number Diff line number Diff line 
/*

 * 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 "ieee80211_key.h"

#include "debugfs.h"

#include "debugfs_key.h"



#define KEY_READ(name, 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->name);	\

	return simple_read_from_buffer(userbuf, count, ppos, buf, res);	\

}

#define KEY_READ_D(name) KEY_READ(name, 20, "%d\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)



KEY_FILE(keylen, D);

KEY_FILE(force_sw_encrypt, D);

KEY_FILE(keyidx, D);

KEY_FILE(hw_key_idx, D);

KEY_FILE(tx_rx_count, D);



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->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->alg) {

	case ALG_WEP:

		len = scnprintf(buf, sizeof(buf), "\n");

	case ALG_TKIP:

		len = scnprintf(buf, sizeof(buf), "%08x %04x\n",

				key->u.tkip.iv32,

				key->u.tkip.iv16);

	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]);

	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->alg) {

	case ALG_WEP:

		len = scnprintf(buf, sizeof(buf), "\n");

	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.iv32_rx[i],

				       key->u.tkip.iv16_rx[i]);

		len = p - buf;

	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;

	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->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->keylen+2;

	char *buf = kmalloc(bufsize, GFP_KERNEL);

	char *p = buf;



	for (i = 0; i < key->keylen; i++)

		p += scnprintf(p, bufsize+buf-p, "%02x", key->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_local *local,

			       struct ieee80211_key *key)

{

	char buf[20];



	if (!local->debugfs.keys)

		return;



	sprintf(buf, "%d", key->keyidx);

	key->debugfs.dir = debugfs_create_dir(buf,

					local->debugfs.keys);



	if (!key->debugfs.dir)

		return;



	DEBUGFS_ADD(keylen);

	DEBUGFS_ADD(force_sw_encrypt);

	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);

};



#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(force_sw_encrypt);

	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_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];



	if (!sdata->debugfsdir)

		return;



	sprintf(buf, "../keys/%d", sdata->default_key->keyidx);

	sdata->debugfs.default_key =

		debugfs_create_symlink("default_key", sdata->debugfsdir, buf);

}

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_link(struct ieee80211_key *key,

				    struct sta_info *sta)

{

	char buf[50];



	if (!key->debugfs.dir)

		return;



	sprintf(buf, "../sta/" MAC_FMT, MAC_ARG(sta->addr));

	key->debugfs.stalink =

		debugfs_create_symlink("station", key->debugfs.dir, buf);

}



void ieee80211_debugfs_key_sta_del(struct ieee80211_key *key,

				   struct sta_info *sta)

{

	debugfs_remove(key->debugfs.stalink);

	key->debugfs.stalink = NULL;

}