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

// SPDX-License-Identifier: GPL-2.0-only
/*
 * cfg80211 debugfs
 *
 * Copyright 2009	Luis R. Rodriguez <lrodriguez@atheros.com>
 * Copyright 2007	Johannes Berg <johannes@sipsolutions.net>
 */

#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 scnprintf(buf + offset,
				 buf_size - offset,
				 "%d Disabled\n",
				 chan->center_freq);

	return scnprintf(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 nl80211_band band;
	struct ieee80211_supported_band *sband;

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

	for (band = 0; band < NUM_NL80211_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);
	}

	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, 0444, 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
d2912cb1	1	// SPDX-License-Identifier: GPL-2.0-only
1ac61302 LR	2	/*
	3	* cfg80211 debugfs
	4	*
	5	* Copyright 2009 Luis R. Rodriguez <lrodriguez@atheros.com>
	6	* Copyright 2007 Johannes Berg <johannes@sipsolutions.net>
1ac61302 LR	7	*/
1ac61302 LR	8
5a0e3ad6	9	#include <linux/slab.h>
1ac61302 LR	10	#include "core.h"
	11	#include "debugfs.h"
	12
1ac61302 LR	13	#define DEBUGFS_READONLY_FILE(name, buflen, fmt, value...) \
	14	static ssize_t name## _read(struct file file, char __user userbuf, \
	15	size_t count, loff_t *ppos) \
	16	{ \
b699b71d	17	struct wiphy *wiphy = file->private_data; \
1ac61302 LR	18	char buf[buflen]; \
	19	int res; \
	20	\
	21	res = scnprintf(buf, buflen, fmt "\n", ##value); \
	22	return simple_read_from_buffer(userbuf, count, ppos, buf, res); \
	23	} \
	24	\
	25	static const struct file_operations name## _ops = { \
	26	.read = name## _read, \
234e3405	27	.open = simple_open, \
2b18ab36	28	.llseek = generic_file_llseek, \
b699b71d	29	}
1ac61302 LR	30
1ac61302 LR	31	DEBUGFS_READONLY_FILE(rts_threshold, 20, "%d",
b699b71d	32	wiphy->rts_threshold);
1ac61302 LR	33	DEBUGFS_READONLY_FILE(fragmentation_threshold, 20, "%d",
	34	wiphy->frag_threshold);
	35	DEBUGFS_READONLY_FILE(short_retry_limit, 20, "%d",
b699b71d	36	wiphy->retry_short);
1ac61302 LR	37	DEBUGFS_READONLY_FILE(long_retry_limit, 20, "%d",
	38	wiphy->retry_long);
	39
80a3511d LR	40	static int ht_print_chan(struct ieee80211_channel *chan,
	41	char *buf, int buf_size, int offset)
	42	{
	43	if (WARN_ON(offset > buf_size))
	44	return 0;
	45
	46	if (chan->flags & IEEE80211_CHAN_DISABLED)
f364ef99 EP	47	return scnprintf(buf + offset,
	48	buf_size - offset,
	49	"%d Disabled\n",
	50	chan->center_freq);
80a3511d	51
f364ef99 EP	52	return scnprintf(buf + offset,
	53	buf_size - offset,
	54	"%d HT40 %c%c\n",
	55	chan->center_freq,
	56	(chan->flags & IEEE80211_CHAN_NO_HT40MINUS) ?
	57	' ' : '-',
	58	(chan->flags & IEEE80211_CHAN_NO_HT40PLUS) ?
	59	' ' : '+');
80a3511d LR	60	}
	61
	62	static ssize_t ht40allow_map_read(struct file *file,
	63	char __user *user_buf,
	64	size_t count, loff_t *ppos)
	65	{
	66	struct wiphy *wiphy = file->private_data;
	67	char *buf;
	68	unsigned int offset = 0, buf_size = PAGE_SIZE, i, r;
57fbcce3	69	enum nl80211_band band;
80a3511d LR	70	struct ieee80211_supported_band *sband;
	71
	72	buf = kzalloc(buf_size, GFP_KERNEL);
	73	if (!buf)
	74	return -ENOMEM;
	75
57fbcce3	76	for (band = 0; band < NUM_NL80211_BANDS; band++) {
80a3511d LR	77	sband = wiphy->bands[band];
	78	if (!sband)
	79	continue;
	80	for (i = 0; i < sband->n_channels; i++)
	81	offset += ht_print_chan(&sband->channels[i],
	82	buf, buf_size, offset);
	83	}
	84
80a3511d LR	85	r = simple_read_from_buffer(user_buf, count, ppos, buf, offset);
	86
	87	kfree(buf);
	88
	89	return r;
	90	}
	91
	92	static const struct file_operations ht40allow_map_ops = {
	93	.read = ht40allow_map_read,
234e3405	94	.open = simple_open,
6038f373	95	.llseek = default_llseek,
80a3511d LR	96	};
80a3511d LR	97
1ac61302	98	#define DEBUGFS_ADD(name) \
b699b71d	99	debugfs_create_file(#name, 0444, phyd, &rdev->wiphy, &name## _ops)
1ac61302	100
79c97e97	101	void cfg80211_debugfs_rdev_add(struct cfg80211_registered_device *rdev)
1ac61302	102	{
79c97e97	103	struct dentry *phyd = rdev->wiphy.debugfsdir;
1ac61302 LR	104
	105	DEBUGFS_ADD(rts_threshold);
	106	DEBUGFS_ADD(fragmentation_threshold);
	107	DEBUGFS_ADD(short_retry_limit);
	108	DEBUGFS_ADD(long_retry_limit);
80a3511d	109	DEBUGFS_ADD(ht40allow_map);
1ac61302	110	}