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net/wireless/debugfs.c
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/* * 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. */ |
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#include <linux/slab.h> |
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#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 " ", ##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, \ |
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.llseek = generic_file_llseek, \ |
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}; 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); |
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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 ", chan->center_freq); return snprintf(buf + offset, buf_size - offset, "%d HT40 %c%c ", 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, |
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.llseek = default_llseek, |
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}; |
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#define DEBUGFS_ADD(name) \ |
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debugfs_create_file(#name, S_IRUGO, phyd, &rdev->wiphy, &name## _ops); |
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void cfg80211_debugfs_rdev_add(struct cfg80211_registered_device *rdev) |
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{ |
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struct dentry *phyd = rdev->wiphy.debugfsdir; |
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DEBUGFS_ADD(rts_threshold); DEBUGFS_ADD(fragmentation_threshold); DEBUGFS_ADD(short_retry_limit); DEBUGFS_ADD(long_retry_limit); |
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DEBUGFS_ADD(ht40allow_map); |
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} |