Luis R. Rodriguez | 1ac6130 | 2009-05-02 00:37:21 -0400 | [diff] [blame] | 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 | |
Tejun Heo | 5a0e3ad | 2010-03-24 17:04:11 +0900 | [diff] [blame] | 12 | #include <linux/slab.h> |
Luis R. Rodriguez | 1ac6130 | 2009-05-02 00:37:21 -0400 | [diff] [blame] | 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, \ |
Arnd Bergmann | 2b18ab36 | 2010-07-06 19:05:31 +0200 | [diff] [blame] | 37 | .llseek = generic_file_llseek, \ |
Luis R. Rodriguez | 1ac6130 | 2009-05-02 00:37:21 -0400 | [diff] [blame] | 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 | |
Luis R. Rodriguez | 80a3511 | 2009-05-02 00:39:30 -0400 | [diff] [blame] | 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, |
Arnd Bergmann | 6038f37 | 2010-08-15 18:52:59 +0200 | [diff] [blame] | 106 | .llseek = default_llseek, |
Luis R. Rodriguez | 80a3511 | 2009-05-02 00:39:30 -0400 | [diff] [blame] | 107 | }; |
| 108 | |
Luis R. Rodriguez | 1ac6130 | 2009-05-02 00:37:21 -0400 | [diff] [blame] | 109 | #define DEBUGFS_ADD(name) \ |
Johannes Berg | 7bcfaf2 | 2009-10-27 12:59:03 +0100 | [diff] [blame] | 110 | debugfs_create_file(#name, S_IRUGO, phyd, &rdev->wiphy, &name## _ops); |
Luis R. Rodriguez | 1ac6130 | 2009-05-02 00:37:21 -0400 | [diff] [blame] | 111 | |
Johannes Berg | 79c97e9 | 2009-07-07 03:56:12 +0200 | [diff] [blame] | 112 | void cfg80211_debugfs_rdev_add(struct cfg80211_registered_device *rdev) |
Luis R. Rodriguez | 1ac6130 | 2009-05-02 00:37:21 -0400 | [diff] [blame] | 113 | { |
Johannes Berg | 79c97e9 | 2009-07-07 03:56:12 +0200 | [diff] [blame] | 114 | struct dentry *phyd = rdev->wiphy.debugfsdir; |
Luis R. Rodriguez | 1ac6130 | 2009-05-02 00:37:21 -0400 | [diff] [blame] | 115 | |
| 116 | DEBUGFS_ADD(rts_threshold); |
| 117 | DEBUGFS_ADD(fragmentation_threshold); |
| 118 | DEBUGFS_ADD(short_retry_limit); |
| 119 | DEBUGFS_ADD(long_retry_limit); |
Luis R. Rodriguez | 80a3511 | 2009-05-02 00:39:30 -0400 | [diff] [blame] | 120 | DEBUGFS_ADD(ht40allow_map); |
Luis R. Rodriguez | 1ac6130 | 2009-05-02 00:37:21 -0400 | [diff] [blame] | 121 | } |