/* * 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);}