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         .llseek = generic_file_llseek,                                  \
  40 };
  41
  42 #define DEBUGFS_ADD(name)                                               \
  43         debugfs_create_file(#name, 0400, phyd, local, &name## _ops);
  44
  45 #define DEBUGFS_ADD_MODE(name, mode)                                    \
  46         debugfs_create_file(#name, mode, phyd, local, &name## _ops);
  47
  48
  49 DEBUGFS_READONLY_FILE(frequency, 20, "%d",
  50                       local->hw.conf.channel->center_freq);
  51 DEBUGFS_READONLY_FILE(total_ps_buffered, 20, "%d",
  52                       local->total_ps_buffered);
  53 DEBUGFS_READONLY_FILE(wep_iv, 20, "%#08x",
  54                       local->wep_iv & 0xffffff);
  55 DEBUGFS_READONLY_FILE(rate_ctrl_alg, 100, "%s",
  56         local->rate_ctrl ? local->rate_ctrl->ops->name : "hw/driver");
  57
  58 static ssize_t tsf_read(struct file *file, char __user *user_buf,
  59                              size_t count, loff_t *ppos)
  60 {
  61         struct ieee80211_local *local = file->private_data;
  62         u64 tsf;
  63         char buf[100];
  64
  65         tsf = drv_get_tsf(local);
  66
  67         snprintf(buf, sizeof(buf), "0x%016llx\n", (unsigned long long) tsf);
  68
  69         return simple_read_from_buffer(user_buf, count, ppos, buf, 19);
  70 }
  71
  72 static ssize_t tsf_write(struct file *file,
  73                          const char __user *user_buf,
  74                          size_t count, loff_t *ppos)
  75 {
  76         struct ieee80211_local *local = file->private_data;
  77         unsigned long long tsf;
  78         char buf[100];
  79         size_t len;
  80
  81         len = min(count, sizeof(buf) - 1);
  82         if (copy_from_user(buf, user_buf, len))
  83                 return -EFAULT;
  84         buf[len] = '\0';
  85
  86         if (strncmp(buf, "reset", 5) == 0) {
  87                 if (local->ops->reset_tsf) {
  88                         drv_reset_tsf(local);
  89                         printk(KERN_INFO "%s: debugfs reset TSF\n", wiphy_name(local->hw.wiphy));
  90                 }
  91         } else {
  92                 tsf = simple_strtoul(buf, NULL, 0);
  93                 if (local->ops->set_tsf) {
  94                         drv_set_tsf(local, tsf);
  95                         printk(KERN_INFO "%s: debugfs set TSF to %#018llx\n", wiphy_name(local->hw.wiphy), tsf);
  96                 }
  97         }
  98
  99         return count;
 100 }
 101
 102 static const struct file_operations tsf_ops = {
 103         .read = tsf_read,
 104         .write = tsf_write,
 105         .open = mac80211_open_file_generic,
 106         .llseek = default_llseek,
 107 };
 108
 109 static ssize_t reset_write(struct file *file, const char __user *user_buf,
 110                            size_t count, loff_t *ppos)
 111 {
 112         struct ieee80211_local *local = file->private_data;
 113
 114         rtnl_lock();
 115         __ieee80211_suspend(&local->hw);
 116         __ieee80211_resume(&local->hw);
 117         rtnl_unlock();
 118
 119         return count;
 120 }
 121
 122 static const struct file_operations reset_ops = {
 123         .write = reset_write,
 124         .open = mac80211_open_file_generic,
 125         .llseek = noop_llseek,
 126 };
 127
 128 static ssize_t noack_read(struct file *file, char __user *user_buf,
 129                           size_t count, loff_t *ppos)
 130 {
 131         struct ieee80211_local *local = file->private_data;
 132         int res;
 133         char buf[10];
 134
 135         res = scnprintf(buf, sizeof(buf), "%d\n", local->wifi_wme_noack_test);
 136
 137         return simple_read_from_buffer(user_buf, count, ppos, buf, res);
 138 }
 139
 140 static ssize_t noack_write(struct file *file,
 141                            const char __user *user_buf,
 142                            size_t count, loff_t *ppos)
 143 {
 144         struct ieee80211_local *local = file->private_data;
 145         char buf[10];
 146         size_t len;
 147
 148         len = min(count, sizeof(buf) - 1);
 149         if (copy_from_user(buf, user_buf, len))
 150                 return -EFAULT;
 151         buf[len] = '\0';
 152
 153         local->wifi_wme_noack_test = !!simple_strtoul(buf, NULL, 0);
 154
 155         return count;
 156 }
 157
 158 static const struct file_operations noack_ops = {
 159         .read = noack_read,
 160         .write = noack_write,
 161         .open = mac80211_open_file_generic,
 162         .llseek = default_llseek,
 163 };
 164
 165 static ssize_t uapsd_queues_read(struct file *file, char __user *user_buf,
 166                                  size_t count, loff_t *ppos)
 167 {
 168         struct ieee80211_local *local = file->private_data;
 169         int res;
 170         char buf[10];
 171
 172         res = scnprintf(buf, sizeof(buf), "0x%x\n", local->uapsd_queues);
 173
 174         return simple_read_from_buffer(user_buf, count, ppos, buf, res);
 175 }
 176
 177 static ssize_t uapsd_queues_write(struct file *file,
 178                                   const char __user *user_buf,
 179                                   size_t count, loff_t *ppos)
 180 {
 181         struct ieee80211_local *local = file->private_data;
 182         unsigned long val;
 183         char buf[10];
 184         size_t len;
 185         int ret;
 186
 187         len = min(count, sizeof(buf) - 1);
 188         if (copy_from_user(buf, user_buf, len))
 189                 return -EFAULT;
 190         buf[len] = '\0';
 191
 192         ret = strict_strtoul(buf, 0, &val);
 193
 194         if (ret)
 195                 return -EINVAL;
 196
 197         if (val & ~IEEE80211_WMM_IE_STA_QOSINFO_AC_MASK)
 198                 return -ERANGE;
 199
 200         local->uapsd_queues = val;
 201
 202         return count;
 203 }
 204
 205 static const struct file_operations uapsd_queues_ops = {
 206         .read = uapsd_queues_read,
 207         .write = uapsd_queues_write,
 208         .open = mac80211_open_file_generic,
 209         .llseek = default_llseek,
 210 };
 211
 212 static ssize_t uapsd_max_sp_len_read(struct file *file, char __user *user_buf,
 213                                      size_t count, loff_t *ppos)
 214 {
 215         struct ieee80211_local *local = file->private_data;
 216         int res;
 217         char buf[10];
 218
 219         res = scnprintf(buf, sizeof(buf), "0x%x\n", local->uapsd_max_sp_len);
 220
 221         return simple_read_from_buffer(user_buf, count, ppos, buf, res);
 222 }
 223
 224 static ssize_t uapsd_max_sp_len_write(struct file *file,
 225                                       const char __user *user_buf,
 226                                       size_t count, loff_t *ppos)
 227 {
 228         struct ieee80211_local *local = file->private_data;
 229         unsigned long val;
 230         char buf[10];
 231         size_t len;
 232         int ret;
 233
 234         len = min(count, sizeof(buf) - 1);
 235         if (copy_from_user(buf, user_buf, len))
 236                 return -EFAULT;
 237         buf[len] = '\0';
 238
 239         ret = strict_strtoul(buf, 0, &val);
 240
 241         if (ret)
 242                 return -EINVAL;
 243
 244         if (val & ~IEEE80211_WMM_IE_STA_QOSINFO_SP_MASK)
 245                 return -ERANGE;
 246
 247         local->uapsd_max_sp_len = val;
 248
 249         return count;
 250 }
 251
 252 static const struct file_operations uapsd_max_sp_len_ops = {
 253         .read = uapsd_max_sp_len_read,
 254         .write = uapsd_max_sp_len_write,
 255         .open = mac80211_open_file_generic,
 256         .llseek = default_llseek,
 257 };
 258
 259 static ssize_t channel_type_read(struct file *file, char __user *user_buf,
 260                        size_t count, loff_t *ppos)
 261 {
 262         struct ieee80211_local *local = file->private_data;
 263         const char *buf;
 264
 265         switch (local->hw.conf.channel_type) {
 266         case NL80211_CHAN_NO_HT:
 267                 buf = "no ht\n";
 268                 break;
 269         case NL80211_CHAN_HT20:
 270                 buf = "ht20\n";
 271                 break;
 272         case NL80211_CHAN_HT40MINUS:
 273                 buf = "ht40-\n";
 274                 break;
 275         case NL80211_CHAN_HT40PLUS:
 276                 buf = "ht40+\n";
 277                 break;
 278         default:
 279                 buf = "???";
 280                 break;
 281         }
 282
 283         return simple_read_from_buffer(user_buf, count, ppos, buf, strlen(buf));
 284 }
 285
 286 static const struct file_operations channel_type_ops = {
 287         .read = channel_type_read,
 288         .open = mac80211_open_file_generic,
 289         .llseek = default_llseek,
 290 };
 291
 292 static ssize_t queues_read(struct file *file, char __user *user_buf,
 293                            size_t count, loff_t *ppos)
 294 {
 295         struct ieee80211_local *local = file->private_data;
 296         unsigned long flags;
 297         char buf[IEEE80211_MAX_QUEUES * 20];
 298         int q, res = 0;
 299
 300         spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
 301         for (q = 0; q < local->hw.queues; q++)
 302                 res += sprintf(buf + res, "%02d: %#.8lx/%d\n", q,
 303                                 local->queue_stop_reasons[q],
 304                                 skb_queue_len(&local->pending[q]));
 305         spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
 306
 307         return simple_read_from_buffer(user_buf, count, ppos, buf, res);
 308 }
 309
 310 static const struct file_operations queues_ops = {
 311         .read = queues_read,
 312         .open = mac80211_open_file_generic,
 313         .llseek = default_llseek,
 314 };
 315
 316 /* statistics stuff */
 317
 318 static ssize_t format_devstat_counter(struct ieee80211_local *local,
 319         char __user *userbuf,
 320         size_t count, loff_t *ppos,
 321         int (*printvalue)(struct ieee80211_low_level_stats *stats, char *buf,
 322                           int buflen))
 323 {
 324         struct ieee80211_low_level_stats stats;
 325         char buf[20];
 326         int res;
 327
 328         rtnl_lock();
 329         res = drv_get_stats(local, &stats);
 330         rtnl_unlock();
 331         if (res)
 332                 return res;
 333         res = printvalue(&stats, buf, sizeof(buf));
 334         return simple_read_from_buffer(userbuf, count, ppos, buf, res);
 335 }
 336
 337 #define DEBUGFS_DEVSTATS_FILE(name)                                     \
 338 static int print_devstats_##name(struct ieee80211_low_level_stats *stats,\
 339                                  char *buf, int buflen)                 \
 340 {                                                                       \
 341         return scnprintf(buf, buflen, "%u\n", stats->name);             \
 342 }                                                                       \
 343 static ssize_t stats_ ##name## _read(struct file *file,                 \
 344                                      char __user *userbuf,              \
 345                                      size_t count, loff_t *ppos)        \
 346 {                                                                       \
 347         return format_devstat_counter(file->private_data,               \
 348                                       userbuf,                          \
 349                                       count,                            \
 350                                       ppos,                             \
 351                                       print_devstats_##name);           \
 352 }                                                                       \
 353                                                                         \
 354 static const struct file_operations stats_ ##name## _ops = {            \
 355         .read = stats_ ##name## _read,                                  \
 356         .open = mac80211_open_file_generic,                             \
 357         .llseek = generic_file_llseek,                                  \
 358 };
 359
 360 #define DEBUGFS_STATS_ADD(name, field)                                  \
 361         debugfs_create_u32(#name, 0400, statsd, (u32 *) &field);
 362 #define DEBUGFS_DEVSTATS_ADD(name)                                      \
 363         debugfs_create_file(#name, 0400, statsd, local, &stats_ ##name## _ops);
 364
 365 DEBUGFS_DEVSTATS_FILE(dot11ACKFailureCount);
 366 DEBUGFS_DEVSTATS_FILE(dot11RTSFailureCount);
 367 DEBUGFS_DEVSTATS_FILE(dot11FCSErrorCount);
 368 DEBUGFS_DEVSTATS_FILE(dot11RTSSuccessCount);
 369
 370 void debugfs_hw_add(struct ieee80211_local *local)
 371 {
 372         struct dentry *phyd = local->hw.wiphy->debugfsdir;
 373         struct dentry *statsd;
 374
 375         if (!phyd)
 376                 return;
 377
 378         local->debugfs.stations = debugfs_create_dir("stations", phyd);
 379         local->debugfs.keys = debugfs_create_dir("keys", phyd);
 380
 381         DEBUGFS_ADD(frequency);
 382         DEBUGFS_ADD(total_ps_buffered);
 383         DEBUGFS_ADD(wep_iv);
 384         DEBUGFS_ADD(tsf);
 385         DEBUGFS_ADD(queues);
 386         DEBUGFS_ADD_MODE(reset, 0200);
 387         DEBUGFS_ADD(noack);
 388         DEBUGFS_ADD(uapsd_queues);
 389         DEBUGFS_ADD(uapsd_max_sp_len);
 390         DEBUGFS_ADD(channel_type);
 391
 392         statsd = debugfs_create_dir("statistics", phyd);
 393
 394         /* if the dir failed, don't put all the other things into the root! */
 395         if (!statsd)
 396                 return;
 397
 398         DEBUGFS_STATS_ADD(transmitted_fragment_count,
 399                 local->dot11TransmittedFragmentCount);
 400         DEBUGFS_STATS_ADD(multicast_transmitted_frame_count,
 401                 local->dot11MulticastTransmittedFrameCount);
 402         DEBUGFS_STATS_ADD(failed_count, local->dot11FailedCount);
 403         DEBUGFS_STATS_ADD(retry_count, local->dot11RetryCount);
 404         DEBUGFS_STATS_ADD(multiple_retry_count,
 405                 local->dot11MultipleRetryCount);
 406         DEBUGFS_STATS_ADD(frame_duplicate_count,
 407                 local->dot11FrameDuplicateCount);
 408         DEBUGFS_STATS_ADD(received_fragment_count,
 409                 local->dot11ReceivedFragmentCount);
 410         DEBUGFS_STATS_ADD(multicast_received_frame_count,
 411                 local->dot11MulticastReceivedFrameCount);
 412         DEBUGFS_STATS_ADD(transmitted_frame_count,
 413                 local->dot11TransmittedFrameCount);
 414 #ifdef CONFIG_MAC80211_DEBUG_COUNTERS
 415         DEBUGFS_STATS_ADD(tx_handlers_drop, local->tx_handlers_drop);
 416         DEBUGFS_STATS_ADD(tx_handlers_queued, local->tx_handlers_queued);
 417         DEBUGFS_STATS_ADD(tx_handlers_drop_unencrypted,
 418                 local->tx_handlers_drop_unencrypted);
 419         DEBUGFS_STATS_ADD(tx_handlers_drop_fragment,
 420                 local->tx_handlers_drop_fragment);
 421         DEBUGFS_STATS_ADD(tx_handlers_drop_wep,
 422                 local->tx_handlers_drop_wep);
 423         DEBUGFS_STATS_ADD(tx_handlers_drop_not_assoc,
 424                 local->tx_handlers_drop_not_assoc);
 425         DEBUGFS_STATS_ADD(tx_handlers_drop_unauth_port,
 426                 local->tx_handlers_drop_unauth_port);
 427         DEBUGFS_STATS_ADD(rx_handlers_drop, local->rx_handlers_drop);
 428         DEBUGFS_STATS_ADD(rx_handlers_queued, local->rx_handlers_queued);
 429         DEBUGFS_STATS_ADD(rx_handlers_drop_nullfunc,
 430                 local->rx_handlers_drop_nullfunc);
 431         DEBUGFS_STATS_ADD(rx_handlers_drop_defrag,
 432                 local->rx_handlers_drop_defrag);
 433         DEBUGFS_STATS_ADD(rx_handlers_drop_short,
 434                 local->rx_handlers_drop_short);
 435         DEBUGFS_STATS_ADD(rx_handlers_drop_passive_scan,
 436                 local->rx_handlers_drop_passive_scan);
 437         DEBUGFS_STATS_ADD(tx_expand_skb_head,
 438                 local->tx_expand_skb_head);
 439         DEBUGFS_STATS_ADD(tx_expand_skb_head_cloned,
 440                 local->tx_expand_skb_head_cloned);
 441         DEBUGFS_STATS_ADD(rx_expand_skb_head,
 442                 local->rx_expand_skb_head);
 443         DEBUGFS_STATS_ADD(rx_expand_skb_head2,
 444                 local->rx_expand_skb_head2);
 445         DEBUGFS_STATS_ADD(rx_handlers_fragments,
 446                 local->rx_handlers_fragments);
 447         DEBUGFS_STATS_ADD(tx_status_drop,
 448                 local->tx_status_drop);
 449 #endif
 450         DEBUGFS_DEVSTATS_ADD(dot11ACKFailureCount);
 451         DEBUGFS_DEVSTATS_ADD(dot11RTSFailureCount);
 452         DEBUGFS_DEVSTATS_ADD(dot11FCSErrorCount);
 453         DEBUGFS_DEVSTATS_ADD(dot11RTSSuccessCount);
 454 }