[linux.git] / net / wireless / debugfs.c

/*
 * cfg80211 debugfs
 *
 * Copyright 2009	Luis R. Rodriguez <[email protected]>
 * Copyright 2007	Johannes Berg <[email protected]>
 *
 * 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/slab.h>
#include "core.h"
#include "debugfs.h"

static int cfg80211_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 wiphy *wiphy= 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 = cfg80211_open_file_generic,				\
	.llseek = generic_file_llseek,					\
};

DEBUGFS_READONLY_FILE(rts_threshold, 20, "%d",
		      wiphy->rts_threshold)
DEBUGFS_READONLY_FILE(fragmentation_threshold, 20, "%d",
		      wiphy->frag_threshold);
DEBUGFS_READONLY_FILE(short_retry_limit, 20, "%d",
		      wiphy->retry_short)
DEBUGFS_READONLY_FILE(long_retry_limit, 20, "%d",
		      wiphy->retry_long);

static int ht_print_chan(struct ieee80211_channel *chan,
			 char *buf, int buf_size, int offset)
{
	if (WARN_ON(offset > buf_size))
		return 0;

	if (chan->flags & IEEE80211_CHAN_DISABLED)
		return snprintf(buf + offset,
				buf_size - offset,
				"%d Disabled\n",
				chan->center_freq);

	return snprintf(buf + offset,
			buf_size - offset,
			"%d HT40 %c%c\n",
			chan->center_freq,
			(chan->flags & IEEE80211_CHAN_NO_HT40MINUS) ? ' ' : '-',
			(chan->flags & IEEE80211_CHAN_NO_HT40PLUS)  ? ' ' : '+');
}

static ssize_t ht40allow_map_read(struct file *file,
				  char __user *user_buf,
				  size_t count, loff_t *ppos)
{
	struct wiphy *wiphy = file->private_data;
	char *buf;
	unsigned int offset = 0, buf_size = PAGE_SIZE, i, r;
	enum ieee80211_band band;
	struct ieee80211_supported_band *sband;

	buf = kzalloc(buf_size, GFP_KERNEL);
	if (!buf)
		return -ENOMEM;

	mutex_lock(&cfg80211_mutex);

	for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
		sband = wiphy->bands[band];
		if (!sband)
			continue;
		for (i = 0; i < sband->n_channels; i++)
			offset += ht_print_chan(&sband->channels[i],
						buf, buf_size, offset);
	}

	mutex_unlock(&cfg80211_mutex);

	r = simple_read_from_buffer(user_buf, count, ppos, buf, offset);

	kfree(buf);

	return r;
}

static const struct file_operations ht40allow_map_ops = {
	.read = ht40allow_map_read,
	.open = cfg80211_open_file_generic,
	.llseek = default_llseek,
};

#define DEBUGFS_ADD(name)						\
	debugfs_create_file(#name, S_IRUGO, phyd, &rdev->wiphy, &name## _ops);

void cfg80211_debugfs_rdev_add(struct cfg80211_registered_device *rdev)
{
	struct dentry *phyd = rdev->wiphy.debugfsdir;

	DEBUGFS_ADD(rts_threshold);
	DEBUGFS_ADD(fragmentation_threshold);
	DEBUGFS_ADD(short_retry_limit);
	DEBUGFS_ADD(long_retry_limit);
	DEBUGFS_ADD(ht40allow_map);
}
Commit	Line	Data
1ac61302 LR	1	/*
	2	* cfg80211 debugfs
	3	*
	4	* Copyright 2009 Luis R. Rodriguez <[email protected]>
	5	* Copyright 2007 Johannes Berg <[email protected]>
	6	*
	7	* This program is free software; you can redistribute it and/or modify
	8	* it under the terms of the GNU General Public License version 2 as
	9	* published by the Free Software Foundation.
	10	*/
	11
5a0e3ad6	12	#include <linux/slab.h>
1ac61302 LR	13	#include "core.h"
	14	#include "debugfs.h"
	15
	16	static int cfg80211_open_file_generic(struct inode inode, struct file file)
	17	{
	18	file->private_data = inode->i_private;
	19	return 0;
	20	}
	21
	22	#define DEBUGFS_READONLY_FILE(name, buflen, fmt, value...) \
	23	static ssize_t name## _read(struct file file, char __user userbuf, \
	24	size_t count, loff_t *ppos) \
	25	{ \
	26	struct wiphy *wiphy= file->private_data; \
	27	char buf[buflen]; \
	28	int res; \
	29	\
	30	res = scnprintf(buf, buflen, fmt "\n", ##value); \
	31	return simple_read_from_buffer(userbuf, count, ppos, buf, res); \
	32	} \
	33	\
	34	static const struct file_operations name## _ops = { \
	35	.read = name## _read, \
	36	.open = cfg80211_open_file_generic, \
2b18ab36	37	.llseek = generic_file_llseek, \
1ac61302 LR	38	};
	39
	40	DEBUGFS_READONLY_FILE(rts_threshold, 20, "%d",
	41	wiphy->rts_threshold)
	42	DEBUGFS_READONLY_FILE(fragmentation_threshold, 20, "%d",
	43	wiphy->frag_threshold);
	44	DEBUGFS_READONLY_FILE(short_retry_limit, 20, "%d",
	45	wiphy->retry_short)
	46	DEBUGFS_READONLY_FILE(long_retry_limit, 20, "%d",
	47	wiphy->retry_long);
	48
80a3511d LR	49	static int ht_print_chan(struct ieee80211_channel *chan,
	50	char *buf, int buf_size, int offset)
	51	{
	52	if (WARN_ON(offset > buf_size))
	53	return 0;
	54
	55	if (chan->flags & IEEE80211_CHAN_DISABLED)
	56	return snprintf(buf + offset,
	57	buf_size - offset,
	58	"%d Disabled\n",
	59	chan->center_freq);
	60
	61	return snprintf(buf + offset,
	62	buf_size - offset,
	63	"%d HT40 %c%c\n",
	64	chan->center_freq,
	65	(chan->flags & IEEE80211_CHAN_NO_HT40MINUS) ? ' ' : '-',
	66	(chan->flags & IEEE80211_CHAN_NO_HT40PLUS) ? ' ' : '+');
	67	}
	68
	69	static ssize_t ht40allow_map_read(struct file *file,
	70	char __user *user_buf,
	71	size_t count, loff_t *ppos)
	72	{
	73	struct wiphy *wiphy = file->private_data;
	74	char *buf;
	75	unsigned int offset = 0, buf_size = PAGE_SIZE, i, r;
	76	enum ieee80211_band band;
	77	struct ieee80211_supported_band *sband;
	78
	79	buf = kzalloc(buf_size, GFP_KERNEL);
	80	if (!buf)
	81	return -ENOMEM;
	82
	83	mutex_lock(&cfg80211_mutex);
	84
	85	for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
	86	sband = wiphy->bands[band];
	87	if (!sband)
	88	continue;
	89	for (i = 0; i < sband->n_channels; i++)
	90	offset += ht_print_chan(&sband->channels[i],
	91	buf, buf_size, offset);
	92	}
	93
	94	mutex_unlock(&cfg80211_mutex);
	95
	96	r = simple_read_from_buffer(user_buf, count, ppos, buf, offset);
	97
	98	kfree(buf);
	99
	100	return r;
	101	}
	102
	103	static const struct file_operations ht40allow_map_ops = {
	104	.read = ht40allow_map_read,
	105	.open = cfg80211_open_file_generic,
6038f373	106	.llseek = default_llseek,
80a3511d LR	107	};
80a3511d LR	108
1ac61302	109	#define DEBUGFS_ADD(name) \
7bcfaf2f	110	debugfs_create_file(#name, S_IRUGO, phyd, &rdev->wiphy, &name## _ops);
1ac61302	111
79c97e97	112	void cfg80211_debugfs_rdev_add(struct cfg80211_registered_device *rdev)
1ac61302	113	{
79c97e97	114	struct dentry *phyd = rdev->wiphy.debugfsdir;
1ac61302 LR	115
	116	DEBUGFS_ADD(rts_threshold);
	117	DEBUGFS_ADD(fragmentation_threshold);
	118	DEBUGFS_ADD(short_retry_limit);
	119	DEBUGFS_ADD(long_retry_limit);
80a3511d	120	DEBUGFS_ADD(ht40allow_map);
1ac61302	121	}