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 #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; \ 23 \ 24 res = scnprintf(buf, buflen, fmt "\n", ##value); \ 25 return simple_read_from_buffer(userbuf, count, ppos, buf, res); \ 26 } \ 27 \ 28 static const struct file_operations name## _ops = { \ 29 .read = name## _read, \ 30 .open = simple_open, \ 31 .llseek = generic_file_llseek, \ 32 }; 33 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); 42 43 static int ht_print_chan(struct ieee80211_channel *chan, 44 char *buf, int buf_size, int offset) 45 { 46 if (WARN_ON(offset > buf_size)) 47 return 0; 48 49 if (chan->flags & IEEE80211_CHAN_DISABLED) 50 return snprintf(buf + offset, 51 buf_size - offset, 52 "%d Disabled\n", 53 chan->center_freq); 54 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) ? ' ' : '+'); 61 } 62 63 static ssize_t ht40allow_map_read(struct file *file, 64 char __user *user_buf, 65 size_t count, loff_t *ppos) 66 { 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; 72 73 buf = kzalloc(buf_size, GFP_KERNEL); 74 if (!buf) 75 return -ENOMEM; 76 77 mutex_lock(&cfg80211_mutex); 78 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); 86 } 87 88 mutex_unlock(&cfg80211_mutex); 89 90 r = simple_read_from_buffer(user_buf, count, ppos, buf, offset); 91 92 kfree(buf); 93 94 return r; 95 } 96 97 static const struct file_operations ht40allow_map_ops = { 98 .read = ht40allow_map_read, 99 .open = simple_open, 100 .llseek = default_llseek, 101 }; 102 103 #define DEBUGFS_ADD(name) \ 104 debugfs_create_file(#name, S_IRUGO, phyd, &rdev->wiphy, &name## _ops); 105 106 void cfg80211_debugfs_rdev_add(struct cfg80211_registered_device *rdev) 107 { 108 struct dentry *phyd = rdev->wiphy.debugfsdir; 109 110 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); 115 } 116