| 1 | |
| 2 | * cfg80211 debugfs
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| 3 | *
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| 4 | * Copyright 2009 Luis R. Rodriguez <[email protected]>
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| 5 | * Copyright 2007 Johannes Berg <[email protected]>
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| 6 | *
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| 7 | * This program is free software; you can redistribute it and/or modify
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| 8 | * it under the terms of the GNU General Public License version 2 as
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| 9 | * published by the Free Software Foundation.
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| 10 |
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| 11 |
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| 12 | #include <linux/slab.h>
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| 13 | #include "core.h"
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| 14 | #include "debugfs.h"
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| 15 |
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| 16 | #define DEBUGFS_READONLY_FILE(name, buflen, fmt, value...) \
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| 17 | static ssize_t name## _read(struct file *file, char __user *userbuf, \
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| 18 | size_t count, loff_t *ppos) \
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| 19 | { \
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| 20 | struct wiphy *wiphy= file->private_data; \
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| 21 | char buf[buflen]; \
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| 22 | int res; \
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| 23 | \
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| 24 | res = scnprintf(buf, buflen, fmt "\n", ##value); \
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| 25 | return simple_read_from_buffer(userbuf, count, ppos, buf, res); \
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| 26 | } \
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| 27 | \
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| 28 | static const struct file_operations name## _ops = { \
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| 29 | .read = name## _read, \
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| 30 | .open = simple_open, \
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| 31 | .llseek = generic_file_llseek, \
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| 32 | };
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| 33 |
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| 34 | DEBUGFS_READONLY_FILE(rts_threshold, 20, "%d",
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| 35 | wiphy->rts_threshold)
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| 36 | DEBUGFS_READONLY_FILE(fragmentation_threshold, 20, "%d",
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| 37 | wiphy->frag_threshold);
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| 38 | DEBUGFS_READONLY_FILE(short_retry_limit, 20, "%d",
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| 39 | wiphy->retry_short)
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| 40 | DEBUGFS_READONLY_FILE(long_retry_limit, 20, "%d",
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| 41 | wiphy->retry_long);
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| 42 |
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| 43 | static int ht_print_chan(struct ieee80211_channel *chan,
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| 44 | char *buf, int buf_size, int offset)
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| 45 | {
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| 46 | if (WARN_ON(offset > buf_size))
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| 47 | return 0;
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| 48 |
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| 49 | if (chan->flags & IEEE80211_CHAN_DISABLED)
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| 50 | return snprintf(buf + offset,
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| 51 | buf_size - offset,
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| 52 | "%d Disabled\n",
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| 53 | chan->center_freq);
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| 54 |
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| 55 | return snprintf(buf + offset,
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| 56 | buf_size - offset,
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| 57 | "%d HT40 %c%c\n",
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| 58 | chan->center_freq,
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| 59 | (chan->flags & IEEE80211_CHAN_NO_HT40MINUS) ? ' ' : '-',
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| 60 | (chan->flags & IEEE80211_CHAN_NO_HT40PLUS) ? ' ' : '+');
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| 61 | }
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| 62 |
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| 63 | static ssize_t ht40allow_map_read(struct file *file,
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| 64 | char __user *user_buf,
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| 65 | size_t count, loff_t *ppos)
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| 66 | {
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| 67 | struct wiphy *wiphy = file->private_data;
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| 68 | char *buf;
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| 69 | unsigned int offset = 0, buf_size = PAGE_SIZE, i, r;
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| 70 | enum ieee80211_band band;
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| 71 | struct ieee80211_supported_band *sband;
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| 72 |
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| 73 | buf = kzalloc(buf_size, GFP_KERNEL);
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| 74 | if (!buf)
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| 75 | return -ENOMEM;
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| 76 |
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| 77 | mutex_lock(&cfg80211_mutex);
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| 78 |
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| 79 | for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
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| 80 | sband = wiphy->bands[band];
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| 81 | if (!sband)
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| 82 | continue;
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| 83 | for (i = 0; i < sband->n_channels; i++)
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| 84 | offset += ht_print_chan(&sband->channels[i],
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| 85 | buf, buf_size, offset);
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| 86 | }
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| 87 |
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| 88 | mutex_unlock(&cfg80211_mutex);
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| 89 |
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| 90 | r = simple_read_from_buffer(user_buf, count, ppos, buf, offset);
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| 91 |
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| 92 | kfree(buf);
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| 93 |
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| 94 | return r;
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| 95 | }
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| 96 |
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| 97 | static const struct file_operations ht40allow_map_ops = {
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| 98 | .read = ht40allow_map_read,
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| 99 | .open = simple_open,
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| 100 | .llseek = default_llseek,
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| 101 | };
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| 102 |
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| 103 | #define DEBUGFS_ADD(name) \
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| 104 | debugfs_create_file(#name, S_IRUGO, phyd, &rdev->wiphy, &name## _ops);
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| 105 |
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| 106 | void cfg80211_debugfs_rdev_add(struct cfg80211_registered_device *rdev)
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| 107 | {
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| 108 | struct dentry *phyd = rdev->wiphy.debugfsdir;
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| 109 |
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| 110 | DEBUGFS_ADD(rts_threshold);
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| 111 | DEBUGFS_ADD(fragmentation_threshold);
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| 112 | DEBUGFS_ADD(short_retry_limit);
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| 113 | DEBUGFS_ADD(long_retry_limit);
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| 114 | DEBUGFS_ADD(ht40allow_map);
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| 115 | }
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