Linux 3.8-rc7
[cris-mirror.git] / net / wireless / debugfs.c
blob920cabe0461b30cd7c5ef9d59e0f010a3bfa4297
1 /*
2 * cfg80211 debugfs
4 * Copyright 2009 Luis R. Rodriguez <lrodriguez@atheros.com>
5 * Copyright 2007 Johannes Berg <johannes@sipsolutions.net>
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.
12 #include <linux/slab.h>
13 #include "core.h"
14 #include "debugfs.h"
16 #define DEBUGFS_READONLY_FILE(name, buflen, fmt, value...) \
17 static 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; \
24 res = scnprintf(buf, buflen, fmt "\n", ##value); \
25 return simple_read_from_buffer(userbuf, count, ppos, buf, res); \
26 } \
28 static const struct file_operations name## _ops = { \
29 .read = name## _read, \
30 .open = simple_open, \
31 .llseek = generic_file_llseek, \
34 DEBUGFS_READONLY_FILE(rts_threshold, 20, "%d",
35 wiphy->rts_threshold)
36 DEBUGFS_READONLY_FILE(fragmentation_threshold, 20, "%d",
37 wiphy->frag_threshold);
38 DEBUGFS_READONLY_FILE(short_retry_limit, 20, "%d",
39 wiphy->retry_short)
40 DEBUGFS_READONLY_FILE(long_retry_limit, 20, "%d",
41 wiphy->retry_long);
43 static int ht_print_chan(struct ieee80211_channel *chan,
44 char *buf, int buf_size, int offset)
46 if (WARN_ON(offset > buf_size))
47 return 0;
49 if (chan->flags & IEEE80211_CHAN_DISABLED)
50 return snprintf(buf + offset,
51 buf_size - offset,
52 "%d Disabled\n",
53 chan->center_freq);
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) ? ' ' : '+');
63 static ssize_t ht40allow_map_read(struct file *file,
64 char __user *user_buf,
65 size_t count, loff_t *ppos)
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;
73 buf = kzalloc(buf_size, GFP_KERNEL);
74 if (!buf)
75 return -ENOMEM;
77 mutex_lock(&cfg80211_mutex);
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);
88 mutex_unlock(&cfg80211_mutex);
90 r = simple_read_from_buffer(user_buf, count, ppos, buf, offset);
92 kfree(buf);
94 return r;
97 static const struct file_operations ht40allow_map_ops = {
98 .read = ht40allow_map_read,
99 .open = simple_open,
100 .llseek = default_llseek,
103 #define DEBUGFS_ADD(name) \
104 debugfs_create_file(#name, S_IRUGO, phyd, &rdev->wiphy, &name## _ops);
106 void cfg80211_debugfs_rdev_add(struct cfg80211_registered_device *rdev)
108 struct dentry *phyd = rdev->wiphy.debugfsdir;
110 DEBUGFS_ADD(rts_threshold);
111 DEBUGFS_ADD(fragmentation_threshold);
112 DEBUGFS_ADD(short_retry_limit);
113 DEBUGFS_ADD(long_retry_limit);
114 DEBUGFS_ADD(ht40allow_map);