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Commit | Line | Data |
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1ac61302 LR |
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 | ||
5a0e3ad6 | 12 | #include <linux/slab.h> |
1ac61302 LR |
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, \ | |
37 | }; | |
38 | ||
39 | DEBUGFS_READONLY_FILE(rts_threshold, 20, "%d", | |
40 | wiphy->rts_threshold) | |
41 | DEBUGFS_READONLY_FILE(fragmentation_threshold, 20, "%d", | |
42 | wiphy->frag_threshold); | |
43 | DEBUGFS_READONLY_FILE(short_retry_limit, 20, "%d", | |
44 | wiphy->retry_short) | |
45 | DEBUGFS_READONLY_FILE(long_retry_limit, 20, "%d", | |
46 | wiphy->retry_long); | |
47 | ||
80a3511d LR |
48 | static int ht_print_chan(struct ieee80211_channel *chan, |
49 | char *buf, int buf_size, int offset) | |
50 | { | |
51 | if (WARN_ON(offset > buf_size)) | |
52 | return 0; | |
53 | ||
54 | if (chan->flags & IEEE80211_CHAN_DISABLED) | |
55 | return snprintf(buf + offset, | |
56 | buf_size - offset, | |
57 | "%d Disabled\n", | |
58 | chan->center_freq); | |
59 | ||
60 | return snprintf(buf + offset, | |
61 | buf_size - offset, | |
62 | "%d HT40 %c%c\n", | |
63 | chan->center_freq, | |
64 | (chan->flags & IEEE80211_CHAN_NO_HT40MINUS) ? ' ' : '-', | |
65 | (chan->flags & IEEE80211_CHAN_NO_HT40PLUS) ? ' ' : '+'); | |
66 | } | |
67 | ||
68 | static ssize_t ht40allow_map_read(struct file *file, | |
69 | char __user *user_buf, | |
70 | size_t count, loff_t *ppos) | |
71 | { | |
72 | struct wiphy *wiphy = file->private_data; | |
73 | char *buf; | |
74 | unsigned int offset = 0, buf_size = PAGE_SIZE, i, r; | |
75 | enum ieee80211_band band; | |
76 | struct ieee80211_supported_band *sband; | |
77 | ||
78 | buf = kzalloc(buf_size, GFP_KERNEL); | |
79 | if (!buf) | |
80 | return -ENOMEM; | |
81 | ||
82 | mutex_lock(&cfg80211_mutex); | |
83 | ||
84 | for (band = 0; band < IEEE80211_NUM_BANDS; band++) { | |
85 | sband = wiphy->bands[band]; | |
86 | if (!sband) | |
87 | continue; | |
88 | for (i = 0; i < sband->n_channels; i++) | |
89 | offset += ht_print_chan(&sband->channels[i], | |
90 | buf, buf_size, offset); | |
91 | } | |
92 | ||
93 | mutex_unlock(&cfg80211_mutex); | |
94 | ||
95 | r = simple_read_from_buffer(user_buf, count, ppos, buf, offset); | |
96 | ||
97 | kfree(buf); | |
98 | ||
99 | return r; | |
100 | } | |
101 | ||
102 | static const struct file_operations ht40allow_map_ops = { | |
103 | .read = ht40allow_map_read, | |
104 | .open = cfg80211_open_file_generic, | |
105 | }; | |
106 | ||
1ac61302 | 107 | #define DEBUGFS_ADD(name) \ |
7bcfaf2f | 108 | debugfs_create_file(#name, S_IRUGO, phyd, &rdev->wiphy, &name## _ops); |
1ac61302 | 109 | |
79c97e97 | 110 | void cfg80211_debugfs_rdev_add(struct cfg80211_registered_device *rdev) |
1ac61302 | 111 | { |
79c97e97 | 112 | struct dentry *phyd = rdev->wiphy.debugfsdir; |
1ac61302 LR |
113 | |
114 | DEBUGFS_ADD(rts_threshold); | |
115 | DEBUGFS_ADD(fragmentation_threshold); | |
116 | DEBUGFS_ADD(short_retry_limit); | |
117 | DEBUGFS_ADD(long_retry_limit); | |
80a3511d | 118 | DEBUGFS_ADD(ht40allow_map); |
1ac61302 | 119 | } |