bridge: Have tx_bytes count headers like rx_bytes.
[linux-2.6.git] / net / wireless / debugfs.c
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
12 #include <linux/slab.h>
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         .llseek = generic_file_llseek,                                  \
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
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,
106         .llseek = default_llseek,
107 };
108
109 #define DEBUGFS_ADD(name)                                               \
110         debugfs_create_file(#name, S_IRUGO, phyd, &rdev->wiphy, &name## _ops);
111
112 void cfg80211_debugfs_rdev_add(struct cfg80211_registered_device *rdev)
113 {
114         struct dentry *phyd = rdev->wiphy.debugfsdir;
115
116         DEBUGFS_ADD(rts_threshold);
117         DEBUGFS_ADD(fragmentation_threshold);
118         DEBUGFS_ADD(short_retry_limit);
119         DEBUGFS_ADD(long_retry_limit);
120         DEBUGFS_ADD(ht40allow_map);
121 }