[GitHub/mt8127/android_kernel_alcatel_ttab.git] / net / wireless / debugfs.c

/*
 * cfg80211 debugfs
 *
 * Copyright 2009	Luis R. Rodriguez <lrodriguez@atheros.com>
 * 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/slab.h>
#include "core.h"
#include "debugfs.h"

#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 = simple_open,						\
	.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 = simple_open,
	.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 <lrodriguez@atheros.com>
	5	* Copyright 2007 Johannes Berg <johannes@sipsolutions.net>
	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
1ac61302 LR	16	#define DEBUGFS_READONLY_FILE(name, buflen, fmt, value...) \
	17	static ssize_t name## _read(struct file file, char __user userbuf, \
	18	size_t count, loff_t *ppos) \
	19	{ \
	20	struct wiphy *wiphy= file->private_data; \
	21	char buf[buflen]; \
	22	int res; \
	23	\
	24	res = scnprintf(buf, buflen, fmt "\n", ##value); \
	25	return simple_read_from_buffer(userbuf, count, ppos, buf, res); \
	26	} \
	27	\
	28	static const struct file_operations name## _ops = { \
	29	.read = name## _read, \
234e3405	30	.open = simple_open, \
2b18ab36	31	.llseek = generic_file_llseek, \
1ac61302 LR	32	};
	33
	34	DEBUGFS_READONLY_FILE(rts_threshold, 20, "%d",
	35	wiphy->rts_threshold)
	36	DEBUGFS_READONLY_FILE(fragmentation_threshold, 20, "%d",
	37	wiphy->frag_threshold);
	38	DEBUGFS_READONLY_FILE(short_retry_limit, 20, "%d",
	39	wiphy->retry_short)
	40	DEBUGFS_READONLY_FILE(long_retry_limit, 20, "%d",
	41	wiphy->retry_long);
	42
80a3511d LR	43	static int ht_print_chan(struct ieee80211_channel *chan,
	44	char *buf, int buf_size, int offset)
	45	{
	46	if (WARN_ON(offset > buf_size))
	47	return 0;
	48
	49	if (chan->flags & IEEE80211_CHAN_DISABLED)
	50	return snprintf(buf + offset,
	51	buf_size - offset,
	52	"%d Disabled\n",
	53	chan->center_freq);
	54
	55	return snprintf(buf + offset,
	56	buf_size - offset,
	57	"%d HT40 %c%c\n",
	58	chan->center_freq,
	59	(chan->flags & IEEE80211_CHAN_NO_HT40MINUS) ? ' ' : '-',
	60	(chan->flags & IEEE80211_CHAN_NO_HT40PLUS) ? ' ' : '+');
	61	}
	62
	63	static ssize_t ht40allow_map_read(struct file *file,
	64	char __user *user_buf,
	65	size_t count, loff_t *ppos)
	66	{
	67	struct wiphy *wiphy = file->private_data;
	68	char *buf;
	69	unsigned int offset = 0, buf_size = PAGE_SIZE, i, r;
	70	enum ieee80211_band band;
	71	struct ieee80211_supported_band *sband;
	72
	73	buf = kzalloc(buf_size, GFP_KERNEL);
	74	if (!buf)
	75	return -ENOMEM;
	76
	77	mutex_lock(&cfg80211_mutex);
	78
	79	for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
	80	sband = wiphy->bands[band];
	81	if (!sband)
	82	continue;
	83	for (i = 0; i < sband->n_channels; i++)
	84	offset += ht_print_chan(&sband->channels[i],
	85	buf, buf_size, offset);
	86	}
	87
	88	mutex_unlock(&cfg80211_mutex);
	89
	90	r = simple_read_from_buffer(user_buf, count, ppos, buf, offset);
	91
	92	kfree(buf);
	93
	94	return r;
	95	}
	96
	97	static const struct file_operations ht40allow_map_ops = {
	98	.read = ht40allow_map_read,
234e3405	99	.open = simple_open,
6038f373	100	.llseek = default_llseek,
80a3511d LR	101	};
80a3511d LR	102
1ac61302	103	#define DEBUGFS_ADD(name) \
7bcfaf2f	104	debugfs_create_file(#name, S_IRUGO, phyd, &rdev->wiphy, &name## _ops);
1ac61302	105
79c97e97	106	void cfg80211_debugfs_rdev_add(struct cfg80211_registered_device *rdev)
1ac61302	107	{
79c97e97	108	struct dentry *phyd = rdev->wiphy.debugfsdir;
1ac61302 LR	109
	110	DEBUGFS_ADD(rts_threshold);
	111	DEBUGFS_ADD(fragmentation_threshold);
	112	DEBUGFS_ADD(short_retry_limit);
	113	DEBUGFS_ADD(long_retry_limit);
80a3511d	114	DEBUGFS_ADD(ht40allow_map);
1ac61302	115	}