Commit | Line | Data |
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d2912cb1 | 1 | // SPDX-License-Identifier: GPL-2.0-only |
1ac61302 LR |
2 | /* |
3 | * cfg80211 debugfs | |
4 | * | |
5 | * Copyright 2009 Luis R. Rodriguez <lrodriguez@atheros.com> | |
6 | * Copyright 2007 Johannes Berg <johannes@sipsolutions.net> | |
1ac61302 LR |
7 | */ |
8 | ||
5a0e3ad6 | 9 | #include <linux/slab.h> |
1ac61302 LR |
10 | #include "core.h" |
11 | #include "debugfs.h" | |
12 | ||
1ac61302 LR |
13 | #define DEBUGFS_READONLY_FILE(name, buflen, fmt, value...) \ |
14 | static ssize_t name## _read(struct file *file, char __user *userbuf, \ | |
15 | size_t count, loff_t *ppos) \ | |
16 | { \ | |
b699b71d | 17 | struct wiphy *wiphy = file->private_data; \ |
1ac61302 LR |
18 | char buf[buflen]; \ |
19 | int res; \ | |
20 | \ | |
21 | res = scnprintf(buf, buflen, fmt "\n", ##value); \ | |
22 | return simple_read_from_buffer(userbuf, count, ppos, buf, res); \ | |
23 | } \ | |
24 | \ | |
25 | static const struct file_operations name## _ops = { \ | |
26 | .read = name## _read, \ | |
234e3405 | 27 | .open = simple_open, \ |
2b18ab36 | 28 | .llseek = generic_file_llseek, \ |
b699b71d | 29 | } |
1ac61302 LR |
30 | |
31 | DEBUGFS_READONLY_FILE(rts_threshold, 20, "%d", | |
b699b71d | 32 | wiphy->rts_threshold); |
1ac61302 LR |
33 | DEBUGFS_READONLY_FILE(fragmentation_threshold, 20, "%d", |
34 | wiphy->frag_threshold); | |
35 | DEBUGFS_READONLY_FILE(short_retry_limit, 20, "%d", | |
b699b71d | 36 | wiphy->retry_short); |
1ac61302 LR |
37 | DEBUGFS_READONLY_FILE(long_retry_limit, 20, "%d", |
38 | wiphy->retry_long); | |
39 | ||
80a3511d LR |
40 | static int ht_print_chan(struct ieee80211_channel *chan, |
41 | char *buf, int buf_size, int offset) | |
42 | { | |
43 | if (WARN_ON(offset > buf_size)) | |
44 | return 0; | |
45 | ||
46 | if (chan->flags & IEEE80211_CHAN_DISABLED) | |
f364ef99 EP |
47 | return scnprintf(buf + offset, |
48 | buf_size - offset, | |
49 | "%d Disabled\n", | |
50 | chan->center_freq); | |
80a3511d | 51 | |
f364ef99 EP |
52 | return scnprintf(buf + offset, |
53 | buf_size - offset, | |
54 | "%d HT40 %c%c\n", | |
55 | chan->center_freq, | |
56 | (chan->flags & IEEE80211_CHAN_NO_HT40MINUS) ? | |
57 | ' ' : '-', | |
58 | (chan->flags & IEEE80211_CHAN_NO_HT40PLUS) ? | |
59 | ' ' : '+'); | |
80a3511d LR |
60 | } |
61 | ||
62 | static ssize_t ht40allow_map_read(struct file *file, | |
63 | char __user *user_buf, | |
64 | size_t count, loff_t *ppos) | |
65 | { | |
66 | struct wiphy *wiphy = file->private_data; | |
67 | char *buf; | |
68 | unsigned int offset = 0, buf_size = PAGE_SIZE, i, r; | |
57fbcce3 | 69 | enum nl80211_band band; |
80a3511d LR |
70 | struct ieee80211_supported_band *sband; |
71 | ||
72 | buf = kzalloc(buf_size, GFP_KERNEL); | |
73 | if (!buf) | |
74 | return -ENOMEM; | |
75 | ||
57fbcce3 | 76 | for (band = 0; band < NUM_NL80211_BANDS; band++) { |
80a3511d LR |
77 | sband = wiphy->bands[band]; |
78 | if (!sband) | |
79 | continue; | |
80 | for (i = 0; i < sband->n_channels; i++) | |
81 | offset += ht_print_chan(&sband->channels[i], | |
82 | buf, buf_size, offset); | |
83 | } | |
84 | ||
80a3511d LR |
85 | r = simple_read_from_buffer(user_buf, count, ppos, buf, offset); |
86 | ||
87 | kfree(buf); | |
88 | ||
89 | return r; | |
90 | } | |
91 | ||
92 | static const struct file_operations ht40allow_map_ops = { | |
93 | .read = ht40allow_map_read, | |
234e3405 | 94 | .open = simple_open, |
6038f373 | 95 | .llseek = default_llseek, |
80a3511d LR |
96 | }; |
97 | ||
1ac61302 | 98 | #define DEBUGFS_ADD(name) \ |
b699b71d | 99 | debugfs_create_file(#name, 0444, phyd, &rdev->wiphy, &name## _ops) |
1ac61302 | 100 | |
79c97e97 | 101 | void cfg80211_debugfs_rdev_add(struct cfg80211_registered_device *rdev) |
1ac61302 | 102 | { |
79c97e97 | 103 | struct dentry *phyd = rdev->wiphy.debugfsdir; |
1ac61302 LR |
104 | |
105 | DEBUGFS_ADD(rts_threshold); | |
106 | DEBUGFS_ADD(fragmentation_threshold); | |
107 | DEBUGFS_ADD(short_retry_limit); | |
108 | DEBUGFS_ADD(long_retry_limit); | |
80a3511d | 109 | DEBUGFS_ADD(ht40allow_map); |
1ac61302 | 110 | } |