net/mac80211/debugfs.c - kernel/msm - Gitiles


 /*
  * 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 "driver-ops.h"
 #include "rate.h"
 #include "debugfs.h"

 int mac80211_open_file_generic(struct inode *inode, struct file *file)
 {
 	file->private_data = inode->i_private;
 	return 0;
 }

 #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)						\
 	debugfs_create_file(#name, 0400, phyd, local, &name## _ops);

 #define DEBUGFS_ADD_MODE(name, mode)					\
 	debugfs_create_file(#name, mode, phyd, local, &name## _ops);


 DEBUGFS_READONLY_FILE(frequency, 20, "%d",
 		      local->hw.conf.channel->center_freq);
 DEBUGFS_READONLY_FILE(total_ps_buffered, 20, "%d",
 		      local->total_ps_buffered);
 DEBUGFS_READONLY_FILE(wep_iv, 20, "%#08x",
 		      local->wep_iv & 0xffffff);
 DEBUGFS_READONLY_FILE(rate_ctrl_alg, 100, "%s",
 	local->rate_ctrl ? local->rate_ctrl->ops->name : "hw/driver");

 static ssize_t tsf_read(struct file *file, char __user *user_buf,
 			     size_t count, loff_t *ppos)
 {
 	struct ieee80211_local *local = file->private_data;
 	u64 tsf;
 	char buf[100];

 	tsf = drv_get_tsf(local);

 	snprintf(buf, sizeof(buf), "0x%016llx\n", (unsigned long long) tsf);

 	return simple_read_from_buffer(user_buf, count, ppos, buf, 19);
 }

 static ssize_t tsf_write(struct file *file,
                          const char __user *user_buf,
                          size_t count, loff_t *ppos)
 {
 	struct ieee80211_local *local = file->private_data;
 	unsigned long long tsf;
 	char buf[100];
 	size_t len;

 	len = min(count, sizeof(buf) - 1);
 	if (copy_from_user(buf, user_buf, len))
 		return -EFAULT;
 	buf[len] = '\0';

 	if (strncmp(buf, "reset", 5) == 0) {
 		if (local->ops->reset_tsf) {
 			drv_reset_tsf(local);
 			printk(KERN_INFO "%s: debugfs reset TSF\n", wiphy_name(local->hw.wiphy));
 		}
 	} else {
 		tsf = simple_strtoul(buf, NULL, 0);
 		if (local->ops->set_tsf) {
 			drv_set_tsf(local, tsf);
 			printk(KERN_INFO "%s: debugfs set TSF to %#018llx\n", wiphy_name(local->hw.wiphy), tsf);
 		}
 	}

 	return count;
 }

 static const struct file_operations tsf_ops = {
 	.read = tsf_read,
 	.write = tsf_write,
 	.open = mac80211_open_file_generic
 };

 static ssize_t reset_write(struct file *file, const char __user *user_buf,
 			   size_t count, loff_t *ppos)
 {
 	struct ieee80211_local *local = file->private_data;

 	rtnl_lock();
 	__ieee80211_suspend(&local->hw);
 	__ieee80211_resume(&local->hw);
 	rtnl_unlock();

 	return count;
 }

 static const struct file_operations reset_ops = {
 	.write = reset_write,
 	.open = mac80211_open_file_generic,
 };

 static ssize_t noack_read(struct file *file, char __user *user_buf,
 			  size_t count, loff_t *ppos)
 {
 	struct ieee80211_local *local = file->private_data;
 	int res;
 	char buf[10];

 	res = scnprintf(buf, sizeof(buf), "%d\n", local->wifi_wme_noack_test);

 	return simple_read_from_buffer(user_buf, count, ppos, buf, res);
 }

 static ssize_t noack_write(struct file *file,
 			   const char __user *user_buf,
 			   size_t count, loff_t *ppos)
 {
 	struct ieee80211_local *local = file->private_data;
 	char buf[10];
 	size_t len;

 	len = min(count, sizeof(buf) - 1);
 	if (copy_from_user(buf, user_buf, len))
 		return -EFAULT;
 	buf[len] = '\0';

 	local->wifi_wme_noack_test = !!simple_strtoul(buf, NULL, 0);

 	return count;
 }

 static const struct file_operations noack_ops = {
 	.read = noack_read,
 	.write = noack_write,
 	.open = mac80211_open_file_generic
 };

 static ssize_t uapsd_queues_read(struct file *file, char __user *user_buf,
 				 size_t count, loff_t *ppos)
 {
 	struct ieee80211_local *local = file->private_data;
 	int res;
 	char buf[10];

 	res = scnprintf(buf, sizeof(buf), "0x%x\n", local->uapsd_queues);

 	return simple_read_from_buffer(user_buf, count, ppos, buf, res);
 }

 static ssize_t uapsd_queues_write(struct file *file,
 				  const char __user *user_buf,
 				  size_t count, loff_t *ppos)
 {
 	struct ieee80211_local *local = file->private_data;
 	unsigned long val;
 	char buf[10];
 	size_t len;
 	int ret;

 	len = min(count, sizeof(buf) - 1);
 	if (copy_from_user(buf, user_buf, len))
 		return -EFAULT;
 	buf[len] = '\0';

 	ret = strict_strtoul(buf, 0, &val);

 	if (ret)
 		return -EINVAL;

 	if (val & ~IEEE80211_WMM_IE_STA_QOSINFO_AC_MASK)
 		return -ERANGE;

 	local->uapsd_queues = val;

 	return count;
 }

 static const struct file_operations uapsd_queues_ops = {
 	.read = uapsd_queues_read,
 	.write = uapsd_queues_write,
 	.open = mac80211_open_file_generic
 };

 static ssize_t uapsd_max_sp_len_read(struct file *file, char __user *user_buf,
 				     size_t count, loff_t *ppos)
 {
 	struct ieee80211_local *local = file->private_data;
 	int res;
 	char buf[10];

 	res = scnprintf(buf, sizeof(buf), "0x%x\n", local->uapsd_max_sp_len);

 	return simple_read_from_buffer(user_buf, count, ppos, buf, res);
 }

 static ssize_t uapsd_max_sp_len_write(struct file *file,
 				      const char __user *user_buf,
 				      size_t count, loff_t *ppos)
 {
 	struct ieee80211_local *local = file->private_data;
 	unsigned long val;
 	char buf[10];
 	size_t len;
 	int ret;

 	len = min(count, sizeof(buf) - 1);
 	if (copy_from_user(buf, user_buf, len))
 		return -EFAULT;
 	buf[len] = '\0';

 	ret = strict_strtoul(buf, 0, &val);

 	if (ret)
 		return -EINVAL;

 	if (val & ~IEEE80211_WMM_IE_STA_QOSINFO_SP_MASK)
 		return -ERANGE;

 	local->uapsd_max_sp_len = val;

 	return count;
 }

 static const struct file_operations uapsd_max_sp_len_ops = {
 	.read = uapsd_max_sp_len_read,
 	.write = uapsd_max_sp_len_write,
 	.open = mac80211_open_file_generic
 };

 static ssize_t queues_read(struct file *file, char __user *user_buf,
 			   size_t count, loff_t *ppos)
 {
 	struct ieee80211_local *local = file->private_data;
 	unsigned long flags;
 	char buf[IEEE80211_MAX_QUEUES * 20];
 	int q, res = 0;

 	spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
 	for (q = 0; q < local->hw.queues; q++)
 		res += sprintf(buf + res, "%02d: %#.8lx/%d\n", q,
 				local->queue_stop_reasons[q],
 				skb_queue_len(&local->pending[q]));
 	spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);

 	return simple_read_from_buffer(user_buf, count, ppos, buf, res);
 }

 static const struct file_operations queues_ops = {
 	.read = queues_read,
 	.open = mac80211_open_file_generic
 };

 /* statistics stuff */

 #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;

 	rtnl_lock();
 	res = drv_get_stats(local, &stats);
 	rtnl_unlock();
 	if (res)
 		return 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)						\
 	debugfs_create_file(#name, 0400, statsd, local, &stats_ ##name## _ops);

 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);
 #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);

 #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(frequency);
 	DEBUGFS_ADD(total_ps_buffered);
 	DEBUGFS_ADD(wep_iv);
 	DEBUGFS_ADD(tsf);
 	DEBUGFS_ADD(queues);
 	DEBUGFS_ADD_MODE(reset, 0200);
 	DEBUGFS_ADD(noack);
 	DEBUGFS_ADD(uapsd_queues);
 	DEBUGFS_ADD(uapsd_max_sp_len);

 	statsd = debugfs_create_dir("statistics", phyd);

 	/* 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);
 #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);
 #endif
 	DEBUGFS_STATS_ADD(dot11ACKFailureCount);
 	DEBUGFS_STATS_ADD(dot11RTSFailureCount);
 	DEBUGFS_STATS_ADD(dot11FCSErrorCount);
 	DEBUGFS_STATS_ADD(dot11RTSSuccessCount);
 }

	/*
	* 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 "driver-ops.h"
	#include "rate.h"
	#include "debugfs.h"

	int mac80211_open_file_generic(struct inode inode, struct file file)
	{
	file->private_data = inode->i_private;
	return 0;
	}

	#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) \
	debugfs_create_file(#name, 0400, phyd, local, &name## _ops);

	#define DEBUGFS_ADD_MODE(name, mode) \
	debugfs_create_file(#name, mode, phyd, local, &name## _ops);


	DEBUGFS_READONLY_FILE(frequency, 20, "%d",
	local->hw.conf.channel->center_freq);
	DEBUGFS_READONLY_FILE(total_ps_buffered, 20, "%d",
	local->total_ps_buffered);
	DEBUGFS_READONLY_FILE(wep_iv, 20, "%#08x",
	local->wep_iv & 0xffffff);
	DEBUGFS_READONLY_FILE(rate_ctrl_alg, 100, "%s",
	local->rate_ctrl ? local->rate_ctrl->ops->name : "hw/driver");

	static ssize_t tsf_read(struct file file, char __user user_buf,
	size_t count, loff_t *ppos)
	{
	struct ieee80211_local *local = file->private_data;
	u64 tsf;
	char buf[100];

	tsf = drv_get_tsf(local);

	snprintf(buf, sizeof(buf), "0x%016llx\n", (unsigned long long) tsf);

	return simple_read_from_buffer(user_buf, count, ppos, buf, 19);
	}

	static ssize_t tsf_write(struct file *file,
	const char __user *user_buf,
	size_t count, loff_t *ppos)
	{
	struct ieee80211_local *local = file->private_data;
	unsigned long long tsf;
	char buf[100];
	size_t len;

	len = min(count, sizeof(buf) - 1);
	if (copy_from_user(buf, user_buf, len))
	return -EFAULT;
	buf[len] = '\0';

	if (strncmp(buf, "reset", 5) == 0) {
	if (local->ops->reset_tsf) {
	drv_reset_tsf(local);
	printk(KERN_INFO "%s: debugfs reset TSF\n", wiphy_name(local->hw.wiphy));
	}
	} else {
	tsf = simple_strtoul(buf, NULL, 0);
	if (local->ops->set_tsf) {
	drv_set_tsf(local, tsf);
	printk(KERN_INFO "%s: debugfs set TSF to %#018llx\n", wiphy_name(local->hw.wiphy), tsf);
	}
	}

	return count;
	}

	static const struct file_operations tsf_ops = {
	.read = tsf_read,
	.write = tsf_write,
	.open = mac80211_open_file_generic
	};

	static ssize_t reset_write(struct file file, const char __user user_buf,
	size_t count, loff_t *ppos)
	{
	struct ieee80211_local *local = file->private_data;

	rtnl_lock();
	__ieee80211_suspend(&local->hw);
	__ieee80211_resume(&local->hw);
	rtnl_unlock();

	return count;
	}

	static const struct file_operations reset_ops = {
	.write = reset_write,
	.open = mac80211_open_file_generic,
	};

	static ssize_t noack_read(struct file file, char __user user_buf,
	size_t count, loff_t *ppos)
	{
	struct ieee80211_local *local = file->private_data;
	int res;
	char buf[10];

	res = scnprintf(buf, sizeof(buf), "%d\n", local->wifi_wme_noack_test);

	return simple_read_from_buffer(user_buf, count, ppos, buf, res);
	}

	static ssize_t noack_write(struct file *file,
	const char __user *user_buf,
	size_t count, loff_t *ppos)
	{
	struct ieee80211_local *local = file->private_data;
	char buf[10];
	size_t len;

	len = min(count, sizeof(buf) - 1);
	if (copy_from_user(buf, user_buf, len))
	return -EFAULT;
	buf[len] = '\0';

	local->wifi_wme_noack_test = !!simple_strtoul(buf, NULL, 0);

	return count;
	}

	static const struct file_operations noack_ops = {
	.read = noack_read,
	.write = noack_write,
	.open = mac80211_open_file_generic
	};

	static ssize_t uapsd_queues_read(struct file file, char __user user_buf,
	size_t count, loff_t *ppos)
	{
	struct ieee80211_local *local = file->private_data;
	int res;
	char buf[10];

	res = scnprintf(buf, sizeof(buf), "0x%x\n", local->uapsd_queues);

	return simple_read_from_buffer(user_buf, count, ppos, buf, res);
	}

	static ssize_t uapsd_queues_write(struct file *file,
	const char __user *user_buf,
	size_t count, loff_t *ppos)
	{
	struct ieee80211_local *local = file->private_data;
	unsigned long val;
	char buf[10];
	size_t len;
	int ret;

	len = min(count, sizeof(buf) - 1);
	if (copy_from_user(buf, user_buf, len))
	return -EFAULT;
	buf[len] = '\0';

	ret = strict_strtoul(buf, 0, &val);

	if (ret)
	return -EINVAL;

	if (val & ~IEEE80211_WMM_IE_STA_QOSINFO_AC_MASK)
	return -ERANGE;

	local->uapsd_queues = val;

	return count;
	}

	static const struct file_operations uapsd_queues_ops = {
	.read = uapsd_queues_read,
	.write = uapsd_queues_write,
	.open = mac80211_open_file_generic
	};

	static ssize_t uapsd_max_sp_len_read(struct file file, char __user user_buf,
	size_t count, loff_t *ppos)
	{
	struct ieee80211_local *local = file->private_data;
	int res;
	char buf[10];

	res = scnprintf(buf, sizeof(buf), "0x%x\n", local->uapsd_max_sp_len);

	return simple_read_from_buffer(user_buf, count, ppos, buf, res);
	}

	static ssize_t uapsd_max_sp_len_write(struct file *file,
	const char __user *user_buf,
	size_t count, loff_t *ppos)
	{
	struct ieee80211_local *local = file->private_data;
	unsigned long val;
	char buf[10];
	size_t len;
	int ret;

	len = min(count, sizeof(buf) - 1);
	if (copy_from_user(buf, user_buf, len))
	return -EFAULT;
	buf[len] = '\0';

	ret = strict_strtoul(buf, 0, &val);

	if (ret)
	return -EINVAL;

	if (val & ~IEEE80211_WMM_IE_STA_QOSINFO_SP_MASK)
	return -ERANGE;

	local->uapsd_max_sp_len = val;

	return count;
	}

	static const struct file_operations uapsd_max_sp_len_ops = {
	.read = uapsd_max_sp_len_read,
	.write = uapsd_max_sp_len_write,
	.open = mac80211_open_file_generic
	};

	static ssize_t queues_read(struct file file, char __user user_buf,
	size_t count, loff_t *ppos)
	{
	struct ieee80211_local *local = file->private_data;
	unsigned long flags;
	char buf[IEEE80211_MAX_QUEUES * 20];
	int q, res = 0;

	spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
	for (q = 0; q < local->hw.queues; q++)
	res += sprintf(buf + res, "%02d: %#.8lx/%d\n", q,
	local->queue_stop_reasons[q],
	skb_queue_len(&local->pending[q]));
	spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);

	return simple_read_from_buffer(user_buf, count, ppos, buf, res);
	}

	static const struct file_operations queues_ops = {
	.read = queues_read,
	.open = mac80211_open_file_generic
	};

	/* statistics stuff */

	#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;

	rtnl_lock();
	res = drv_get_stats(local, &stats);
	rtnl_unlock();
	if (res)
	return 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) \
	debugfs_create_file(#name, 0400, statsd, local, &stats_ ##name## _ops);

	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);
	#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);

	#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(frequency);
	DEBUGFS_ADD(total_ps_buffered);
	DEBUGFS_ADD(wep_iv);
	DEBUGFS_ADD(tsf);
	DEBUGFS_ADD(queues);
	DEBUGFS_ADD_MODE(reset, 0200);
	DEBUGFS_ADD(noack);
	DEBUGFS_ADD(uapsd_queues);
	DEBUGFS_ADD(uapsd_max_sp_len);

	statsd = debugfs_create_dir("statistics", phyd);

	/* 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);
	#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);
	#endif
	DEBUGFS_STATS_ADD(dot11ACKFailureCount);
	DEBUGFS_STATS_ADD(dot11RTSFailureCount);
	DEBUGFS_STATS_ADD(dot11FCSErrorCount);
	DEBUGFS_STATS_ADD(dot11RTSSuccessCount);
	}