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

 /*
  * 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";
 	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(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(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(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(antenna_sel_tx);
 	DEBUGFS_ADD(antenna_sel_rx);
 	DEBUGFS_ADD(bridge_packets);
 	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(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(antenna_sel_tx);
 	DEBUGFS_DEL(antenna_sel_rx);
 	DEBUGFS_DEL(bridge_packets);
 	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(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;
 }
	/*
	* 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";
	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(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(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(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_QUEUES15], 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_QUEUES15], 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(antenna_sel_tx);
	DEBUGFS_ADD(antenna_sel_rx);
	DEBUGFS_ADD(bridge_packets);
	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(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(antenna_sel_tx);
	DEBUGFS_DEL(antenna_sel_rx);
	DEBUGFS_DEL(bridge_packets);
	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(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;
	}