net/mac80211/debugfs.c

   1
   2 /*
   3  * mac80211 debugfs for wireless PHYs
   4  *
   5  * Copyright 2007       Johannes Berg <johannes@sipsolutions.net>
   6  *
   7  * GPLv2
   8  *
   9  */
  10
  11 #include <linux/debugfs.h>
  12 #include <linux/rtnetlink.h>
  13 #include "ieee80211_i.h"
  14 #include "driver-ops.h"
  15 #include "rate.h"
  16 #include "debugfs.h"
  17
  18 int mac80211_open_file_generic(struct inode *inode, struct file *file)
  19 {
  20         file->private_data = inode->i_private;
  21         return 0;
  22 }
  23
  24 #define DEBUGFS_READONLY_FILE(name, buflen, fmt, value...)              \
  25 static ssize_t name## _read(struct file *file, char __user *userbuf,    \
  26                             size_t count, loff_t *ppos)                 \
  27 {                                                                       \
  28         struct ieee80211_local *local = file->private_data;             \
  29         char buf[buflen];                                               \
  30         int res;                                                        \
  31                                                                         \
  32         res = scnprintf(buf, buflen, fmt "\n", ##value);                \
  33         return simple_read_from_buffer(userbuf, count, ppos, buf, res); \
  34 }                                                                       \
  35                                                                         \
  36 static const struct file_operations name## _ops = {                     \
  37         .read = name## _read,                                           \
  38         .open = mac80211_open_file_generic,                             \
  39 };
  40
  41 #define DEBUGFS_ADD(name)                                               \
  42         debugfs_create_file(#name, 0400, phyd, local, &name## _ops);
  43
  44 #define DEBUGFS_ADD_MODE(name, mode)                                    \
  45         debugfs_create_file(#name, mode, phyd, local, &name## _ops);
  46
  47
  48 DEBUGFS_READONLY_FILE(frequency, 20, "%d",
  49                       local->hw.conf.channel->center_freq);
  50 DEBUGFS_READONLY_FILE(total_ps_buffered, 20, "%d",
  51                       local->total_ps_buffered);
  52 DEBUGFS_READONLY_FILE(wep_iv, 20, "%#08x",
  53                       local->wep_iv & 0xffffff);
  54 DEBUGFS_READONLY_FILE(rate_ctrl_alg, 100, "%s",
  55         local->rate_ctrl ? local->rate_ctrl->ops->name : "hw/driver");
  56
  57 static ssize_t tsf_read(struct file *file, char __user *user_buf,
  58                              size_t count, loff_t *ppos)
  59 {
  60         struct ieee80211_local *local = file->private_data;
  61         u64 tsf;
  62         char buf[100];
  63
  64         tsf = drv_get_tsf(local);
  65
  66         snprintf(buf, sizeof(buf), "0x%016llx\n", (unsigned long long) tsf);
  67
  68         return simple_read_from_buffer(user_buf, count, ppos, buf, 19);
  69 }
  70
  71 static ssize_t tsf_write(struct file *file,
  72                          const char __user *user_buf,
  73                          size_t count, loff_t *ppos)
  74 {
  75         struct ieee80211_local *local = file->private_data;
  76         unsigned long long tsf;
  77         char buf[100];
  78         size_t len;
  79
  80         len = min(count, sizeof(buf) - 1);
  81         if (copy_from_user(buf, user_buf, len))
  82                 return -EFAULT;
  83         buf[len] = '\0';
  84
  85         if (strncmp(buf, "reset", 5) == 0) {
  86                 if (local->ops->reset_tsf) {
  87                         drv_reset_tsf(local);
  88                         printk(KERN_INFO "%s: debugfs reset TSF\n", wiphy_name(local->hw.wiphy));
  89                 }
  90         } else {
  91                 tsf = simple_strtoul(buf, NULL, 0);
  92                 if (local->ops->set_tsf) {
  93                         drv_set_tsf(local, tsf);
  94                         printk(KERN_INFO "%s: debugfs set TSF to %#018llx\n", wiphy_name(local->hw.wiphy), tsf);
  95                 }
  96         }
  97
  98         return count;
  99 }
 100
 101 static const struct file_operations tsf_ops = {
 102         .read = tsf_read,
 103         .write = tsf_write,
 104         .open = mac80211_open_file_generic
 105 };
 106
 107 static ssize_t reset_write(struct file *file, const char __user *user_buf,
 108                            size_t count, loff_t *ppos)
 109 {
 110         struct ieee80211_local *local = file->private_data;
 111
 112         rtnl_lock();
 113         __ieee80211_suspend(&local->hw);
 114         __ieee80211_resume(&local->hw);
 115         rtnl_unlock();
 116
 117         return count;
 118 }
 119
 120 static const struct file_operations reset_ops = {
 121         .write = reset_write,
 122         .open = mac80211_open_file_generic,
 123 };
 124
 125 static ssize_t noack_read(struct file *file, char __user *user_buf,
 126                           size_t count, loff_t *ppos)
 127 {
 128         struct ieee80211_local *local = file->private_data;
 129         int res;
 130         char buf[10];
 131
 132         res = scnprintf(buf, sizeof(buf), "%d\n", local->wifi_wme_noack_test);
 133
 134         return simple_read_from_buffer(user_buf, count, ppos, buf, res);
 135 }
 136
 137 static ssize_t noack_write(struct file *file,
 138                            const char __user *user_buf,
 139                            size_t count, loff_t *ppos)
 140 {
 141         struct ieee80211_local *local = file->private_data;
 142         char buf[10];
 143         size_t len;
 144
 145         len = min(count, sizeof(buf) - 1);
 146         if (copy_from_user(buf, user_buf, len))
 147                 return -EFAULT;
 148         buf[len] = '\0';
 149
 150         local->wifi_wme_noack_test = !!simple_strtoul(buf, NULL, 0);
 151
 152         return count;
 153 }
 154
 155 static const struct file_operations noack_ops = {
 156         .read = noack_read,
 157         .write = noack_write,
 158         .open = mac80211_open_file_generic
 159 };
 160
 161 static ssize_t uapsd_queues_read(struct file *file, char __user *user_buf,
 162                                  size_t count, loff_t *ppos)
 163 {
 164         struct ieee80211_local *local = file->private_data;
 165         int res;
 166         char buf[10];
 167
 168         res = scnprintf(buf, sizeof(buf), "0x%x\n", local->uapsd_queues);
 169
 170         return simple_read_from_buffer(user_buf, count, ppos, buf, res);
 171 }
 172
 173 static ssize_t uapsd_queues_write(struct file *file,
 174                                   const char __user *user_buf,
 175                                   size_t count, loff_t *ppos)
 176 {
 177         struct ieee80211_local *local = file->private_data;
 178         unsigned long val;
 179         char buf[10];
 180         size_t len;
 181         int ret;
 182
 183         len = min(count, sizeof(buf) - 1);
 184         if (copy_from_user(buf, user_buf, len))
 185                 return -EFAULT;
 186         buf[len] = '\0';
 187
 188         ret = strict_strtoul(buf, 0, &val);
 189
 190         if (ret)
 191                 return -EINVAL;
 192
 193         if (val & ~IEEE80211_WMM_IE_STA_QOSINFO_AC_MASK)
 194                 return -ERANGE;
 195
 196         local->uapsd_queues = val;
 197
 198         return count;
 199 }
 200
 201 static const struct file_operations uapsd_queues_ops = {
 202         .read = uapsd_queues_read,
 203         .write = uapsd_queues_write,
 204         .open = mac80211_open_file_generic
 205 };
 206
 207 static ssize_t uapsd_max_sp_len_read(struct file *file, char __user *user_buf,
 208                                      size_t count, loff_t *ppos)
 209 {
 210         struct ieee80211_local *local = file->private_data;
 211         int res;
 212         char buf[10];
 213
 214         res = scnprintf(buf, sizeof(buf), "0x%x\n", local->uapsd_max_sp_len);
 215
 216         return simple_read_from_buffer(user_buf, count, ppos, buf, res);
 217 }
 218
 219 static ssize_t uapsd_max_sp_len_write(struct file *file,
 220                                       const char __user *user_buf,
 221                                       size_t count, loff_t *ppos)
 222 {
 223         struct ieee80211_local *local = file->private_data;
 224         unsigned long val;
 225         char buf[10];
 226         size_t len;
 227         int ret;
 228
 229         len = min(count, sizeof(buf) - 1);
 230         if (copy_from_user(buf, user_buf, len))
 231                 return -EFAULT;
 232         buf[len] = '\0';
 233
 234         ret = strict_strtoul(buf, 0, &val);
 235
 236         if (ret)
 237                 return -EINVAL;
 238
 239         if (val & ~IEEE80211_WMM_IE_STA_QOSINFO_SP_MASK)
 240                 return -ERANGE;
 241
 242         local->uapsd_max_sp_len = val;
 243
 244         return count;
 245 }
 246
 247 static const struct file_operations uapsd_max_sp_len_ops = {
 248         .read = uapsd_max_sp_len_read,
 249         .write = uapsd_max_sp_len_write,
 250         .open = mac80211_open_file_generic
 251 };
 252
 253 static ssize_t channel_type_read(struct file *file, char __user *user_buf,
 254                        size_t count, loff_t *ppos)
 255 {
 256         struct ieee80211_local *local = file->private_data;
 257         const char *buf;
 258
 259         switch (local->hw.conf.channel_type) {
 260         case NL80211_CHAN_NO_HT:
 261                 buf = "no ht\n";
 262                 break;
 263         case NL80211_CHAN_HT20:
 264                 buf = "ht20\n";
 265                 break;
 266         case NL80211_CHAN_HT40MINUS:
 267                 buf = "ht40-\n";
 268                 break;
 269         case NL80211_CHAN_HT40PLUS:
 270                 buf = "ht40+\n";
 271                 break;
 272         default:
 273                 buf = "???";
 274                 break;
 275         }
 276
 277         return simple_read_from_buffer(user_buf, count, ppos, buf, strlen(buf));
 278 }
 279
 280 static const struct file_operations channel_type_ops = {
 281         .read = channel_type_read,
 282         .open = mac80211_open_file_generic
 283 };
 284
 285 static ssize_t queues_read(struct file *file, char __user *user_buf,
 286                            size_t count, loff_t *ppos)
 287 {
 288         struct ieee80211_local *local = file->private_data;
 289         unsigned long flags;
 290         char buf[IEEE80211_MAX_QUEUES * 20];
 291         int q, res = 0;
 292
 293         spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
 294         for (q = 0; q < local->hw.queues; q++)
 295                 res += sprintf(buf + res, "%02d: %#.8lx/%d\n", q,
 296                                 local->queue_stop_reasons[q],
 297                                 skb_queue_len(&local->pending[q]));
 298         spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
 299
 300         return simple_read_from_buffer(user_buf, count, ppos, buf, res);
 301 }
 302
 303 static const struct file_operations queues_ops = {
 304         .read = queues_read,
 305         .open = mac80211_open_file_generic
 306 };
 307
 308 /* statistics stuff */
 309
 310 #define DEBUGFS_STATS_FILE(name, buflen, fmt, value...)                 \
 311         DEBUGFS_READONLY_FILE(stats_ ##name, buflen, fmt, ##value)
 312
 313 static ssize_t format_devstat_counter(struct ieee80211_local *local,
 314         char __user *userbuf,
 315         size_t count, loff_t *ppos,
 316         int (*printvalue)(struct ieee80211_low_level_stats *stats, char *buf,
 317                           int buflen))
 318 {
 319         struct ieee80211_low_level_stats stats;
 320         char buf[20];
 321         int res;
 322
 323         rtnl_lock();
 324         res = drv_get_stats(local, &stats);
 325         rtnl_unlock();
 326         if (res)
 327                 return res;
 328         res = printvalue(&stats, buf, sizeof(buf));
 329         return simple_read_from_buffer(userbuf, count, ppos, buf, res);
 330 }
 331
 332 #define DEBUGFS_DEVSTATS_FILE(name)                                     \
 333 static int print_devstats_##name(struct ieee80211_low_level_stats *stats,\
 334                                  char *buf, int buflen)                 \
 335 {                                                                       \
 336         return scnprintf(buf, buflen, "%u\n", stats->name);             \
 337 }                                                                       \
 338 static ssize_t stats_ ##name## _read(struct file *file,                 \
 339                                      char __user *userbuf,              \
 340                                      size_t count, loff_t *ppos)        \
 341 {                                                                       \
 342         return format_devstat_counter(file->private_data,               \
 343                                       userbuf,                          \
 344                                       count,                            \
 345                                       ppos,                             \
 346                                       print_devstats_##name);           \
 347 }                                                                       \
 348                                                                         \
 349 static const struct file_operations stats_ ##name## _ops = {            \
 350         .read = stats_ ##name## _read,                                  \
 351         .open = mac80211_open_file_generic,                             \
 352 };
 353
 354 #define DEBUGFS_STATS_ADD(name)                                         \
 355         debugfs_create_file(#name, 0400, statsd, local, &stats_ ##name## _ops);
 356
 357 DEBUGFS_STATS_FILE(transmitted_fragment_count, 20, "%u",
 358                    local->dot11TransmittedFragmentCount);
 359 DEBUGFS_STATS_FILE(multicast_transmitted_frame_count, 20, "%u",
 360                    local->dot11MulticastTransmittedFrameCount);
 361 DEBUGFS_STATS_FILE(failed_count, 20, "%u",
 362                    local->dot11FailedCount);
 363 DEBUGFS_STATS_FILE(retry_count, 20, "%u",
 364                    local->dot11RetryCount);
 365 DEBUGFS_STATS_FILE(multiple_retry_count, 20, "%u",
 366                    local->dot11MultipleRetryCount);
 367 DEBUGFS_STATS_FILE(frame_duplicate_count, 20, "%u",
 368                    local->dot11FrameDuplicateCount);
 369 DEBUGFS_STATS_FILE(received_fragment_count, 20, "%u",
 370                    local->dot11ReceivedFragmentCount);
 371 DEBUGFS_STATS_FILE(multicast_received_frame_count, 20, "%u",
 372                    local->dot11MulticastReceivedFrameCount);
 373 DEBUGFS_STATS_FILE(transmitted_frame_count, 20, "%u",
 374                    local->dot11TransmittedFrameCount);
 375 #ifdef CONFIG_MAC80211_DEBUG_COUNTERS
 376 DEBUGFS_STATS_FILE(tx_handlers_drop, 20, "%u",
 377                    local->tx_handlers_drop);
 378 DEBUGFS_STATS_FILE(tx_handlers_queued, 20, "%u",
 379                    local->tx_handlers_queued);
 380 DEBUGFS_STATS_FILE(tx_handlers_drop_unencrypted, 20, "%u",
 381                    local->tx_handlers_drop_unencrypted);
 382 DEBUGFS_STATS_FILE(tx_handlers_drop_fragment, 20, "%u",
 383                    local->tx_handlers_drop_fragment);
 384 DEBUGFS_STATS_FILE(tx_handlers_drop_wep, 20, "%u",
 385                    local->tx_handlers_drop_wep);
 386 DEBUGFS_STATS_FILE(tx_handlers_drop_not_assoc, 20, "%u",
 387                    local->tx_handlers_drop_not_assoc);
 388 DEBUGFS_STATS_FILE(tx_handlers_drop_unauth_port, 20, "%u",
 389                    local->tx_handlers_drop_unauth_port);
 390 DEBUGFS_STATS_FILE(rx_handlers_drop, 20, "%u",
 391                    local->rx_handlers_drop);
 392 DEBUGFS_STATS_FILE(rx_handlers_queued, 20, "%u",
 393                    local->rx_handlers_queued);
 394 DEBUGFS_STATS_FILE(rx_handlers_drop_nullfunc, 20, "%u",
 395                    local->rx_handlers_drop_nullfunc);
 396 DEBUGFS_STATS_FILE(rx_handlers_drop_defrag, 20, "%u",
 397                    local->rx_handlers_drop_defrag);
 398 DEBUGFS_STATS_FILE(rx_handlers_drop_short, 20, "%u",
 399                    local->rx_handlers_drop_short);
 400 DEBUGFS_STATS_FILE(rx_handlers_drop_passive_scan, 20, "%u",
 401                    local->rx_handlers_drop_passive_scan);
 402 DEBUGFS_STATS_FILE(tx_expand_skb_head, 20, "%u",
 403                    local->tx_expand_skb_head);
 404 DEBUGFS_STATS_FILE(tx_expand_skb_head_cloned, 20, "%u",
 405                    local->tx_expand_skb_head_cloned);
 406 DEBUGFS_STATS_FILE(rx_expand_skb_head, 20, "%u",
 407                    local->rx_expand_skb_head);
 408 DEBUGFS_STATS_FILE(rx_expand_skb_head2, 20, "%u",
 409                    local->rx_expand_skb_head2);
 410 DEBUGFS_STATS_FILE(rx_handlers_fragments, 20, "%u",
 411                    local->rx_handlers_fragments);
 412 DEBUGFS_STATS_FILE(tx_status_drop, 20, "%u",
 413                    local->tx_status_drop);
 414
 415 #endif
 416
 417 DEBUGFS_DEVSTATS_FILE(dot11ACKFailureCount);
 418 DEBUGFS_DEVSTATS_FILE(dot11RTSFailureCount);
 419 DEBUGFS_DEVSTATS_FILE(dot11FCSErrorCount);
 420 DEBUGFS_DEVSTATS_FILE(dot11RTSSuccessCount);
 421
 422
 423 void debugfs_hw_add(struct ieee80211_local *local)
 424 {
 425         struct dentry *phyd = local->hw.wiphy->debugfsdir;
 426         struct dentry *statsd;
 427
 428         if (!phyd)
 429                 return;
 430
 431         local->debugfs.stations = debugfs_create_dir("stations", phyd);
 432         local->debugfs.keys = debugfs_create_dir("keys", phyd);
 433
 434         DEBUGFS_ADD(frequency);
 435         DEBUGFS_ADD(total_ps_buffered);
 436         DEBUGFS_ADD(wep_iv);
 437         DEBUGFS_ADD(tsf);
 438         DEBUGFS_ADD(queues);
 439         DEBUGFS_ADD_MODE(reset, 0200);
 440         DEBUGFS_ADD(noack);
 441         DEBUGFS_ADD(uapsd_queues);
 442         DEBUGFS_ADD(uapsd_max_sp_len);
 443         DEBUGFS_ADD(channel_type);
 444
 445         statsd = debugfs_create_dir("statistics", phyd);
 446
 447         /* if the dir failed, don't put all the other things into the root! */
 448         if (!statsd)
 449                 return;
 450
 451         DEBUGFS_STATS_ADD(transmitted_fragment_count);
 452         DEBUGFS_STATS_ADD(multicast_transmitted_frame_count);
 453         DEBUGFS_STATS_ADD(failed_count);
 454         DEBUGFS_STATS_ADD(retry_count);
 455         DEBUGFS_STATS_ADD(multiple_retry_count);
 456         DEBUGFS_STATS_ADD(frame_duplicate_count);
 457         DEBUGFS_STATS_ADD(received_fragment_count);
 458         DEBUGFS_STATS_ADD(multicast_received_frame_count);
 459         DEBUGFS_STATS_ADD(transmitted_frame_count);
 460 #ifdef CONFIG_MAC80211_DEBUG_COUNTERS
 461         DEBUGFS_STATS_ADD(tx_handlers_drop);
 462         DEBUGFS_STATS_ADD(tx_handlers_queued);
 463         DEBUGFS_STATS_ADD(tx_handlers_drop_unencrypted);
 464         DEBUGFS_STATS_ADD(tx_handlers_drop_fragment);
 465         DEBUGFS_STATS_ADD(tx_handlers_drop_wep);
 466         DEBUGFS_STATS_ADD(tx_handlers_drop_not_assoc);
 467         DEBUGFS_STATS_ADD(tx_handlers_drop_unauth_port);
 468         DEBUGFS_STATS_ADD(rx_handlers_drop);
 469         DEBUGFS_STATS_ADD(rx_handlers_queued);
 470         DEBUGFS_STATS_ADD(rx_handlers_drop_nullfunc);
 471         DEBUGFS_STATS_ADD(rx_handlers_drop_defrag);
 472         DEBUGFS_STATS_ADD(rx_handlers_drop_short);
 473         DEBUGFS_STATS_ADD(rx_handlers_drop_passive_scan);
 474         DEBUGFS_STATS_ADD(tx_expand_skb_head);
 475         DEBUGFS_STATS_ADD(tx_expand_skb_head_cloned);
 476         DEBUGFS_STATS_ADD(rx_expand_skb_head);
 477         DEBUGFS_STATS_ADD(rx_expand_skb_head2);
 478         DEBUGFS_STATS_ADD(rx_handlers_fragments);
 479         DEBUGFS_STATS_ADD(tx_status_drop);
 480 #endif
 481         DEBUGFS_STATS_ADD(dot11ACKFailureCount);
 482         DEBUGFS_STATS_ADD(dot11RTSFailureCount);
 483         DEBUGFS_STATS_ADD(dot11FCSErrorCount);
 484         DEBUGFS_STATS_ADD(dot11RTSSuccessCount);
 485 }