blob: 920cabe0461b30cd7c5ef9d59e0f010a3bfa4297 [file] [log] [blame]
Luis R. Rodriguez1ac61302009-05-02 00:37:21 -04001/*
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 Heo5a0e3ad2010-03-24 17:04:11 +090012#include <linux/slab.h>
Luis R. Rodriguez1ac61302009-05-02 00:37:21 -040013#include "core.h"
14#include "debugfs.h"
15
Luis R. Rodriguez1ac61302009-05-02 00:37:21 -040016#define DEBUGFS_READONLY_FILE(name, buflen, fmt, value...) \
17static 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 \
28static const struct file_operations name## _ops = { \
29 .read = name## _read, \
Stephen Boyd234e3402012-04-05 14:25:11 -070030 .open = simple_open, \
Arnd Bergmann2b18ab32010-07-06 19:05:31 +020031 .llseek = generic_file_llseek, \
Luis R. Rodriguez1ac61302009-05-02 00:37:21 -040032};
33
34DEBUGFS_READONLY_FILE(rts_threshold, 20, "%d",
35 wiphy->rts_threshold)
36DEBUGFS_READONLY_FILE(fragmentation_threshold, 20, "%d",
37 wiphy->frag_threshold);
38DEBUGFS_READONLY_FILE(short_retry_limit, 20, "%d",
39 wiphy->retry_short)
40DEBUGFS_READONLY_FILE(long_retry_limit, 20, "%d",
41 wiphy->retry_long);
42
Luis R. Rodriguez80a35112009-05-02 00:39:30 -040043static 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
63static 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
97static const struct file_operations ht40allow_map_ops = {
98 .read = ht40allow_map_read,
Stephen Boyd234e3402012-04-05 14:25:11 -070099 .open = simple_open,
Arnd Bergmann6038f372010-08-15 18:52:59 +0200100 .llseek = default_llseek,
Luis R. Rodriguez80a35112009-05-02 00:39:30 -0400101};
102
Luis R. Rodriguez1ac61302009-05-02 00:37:21 -0400103#define DEBUGFS_ADD(name) \
Johannes Berg7bcfaf22009-10-27 12:59:03 +0100104 debugfs_create_file(#name, S_IRUGO, phyd, &rdev->wiphy, &name## _ops);
Luis R. Rodriguez1ac61302009-05-02 00:37:21 -0400105
Johannes Berg79c97e92009-07-07 03:56:12 +0200106void cfg80211_debugfs_rdev_add(struct cfg80211_registered_device *rdev)
Luis R. Rodriguez1ac61302009-05-02 00:37:21 -0400107{
Johannes Berg79c97e92009-07-07 03:56:12 +0200108 struct dentry *phyd = rdev->wiphy.debugfsdir;
Luis R. Rodriguez1ac61302009-05-02 00:37:21 -0400109
110 DEBUGFS_ADD(rts_threshold);
111 DEBUGFS_ADD(fragmentation_threshold);
112 DEBUGFS_ADD(short_retry_limit);
113 DEBUGFS_ADD(long_retry_limit);
Luis R. Rodriguez80a35112009-05-02 00:39:30 -0400114 DEBUGFS_ADD(ht40allow_map);
Luis R. Rodriguez1ac61302009-05-02 00:37:21 -0400115}