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_FORMAT_BUFFER_SIZE 100
  25
  26 int mac80211_format_buffer(char __user *userbuf, size_t count,
  27                                   loff_t *ppos, char *fmt, ...)
  28 {
  29         va_list args;
  30         char buf[DEBUGFS_FORMAT_BUFFER_SIZE];
  31         int res;
  32
  33         va_start(args, fmt);
  34         res = vscnprintf(buf, sizeof(buf), fmt, args);
  35         va_end(args);
  36
  37         return simple_read_from_buffer(userbuf, count, ppos, buf, res);
  38 }
  39
  40 #define DEBUGFS_READONLY_FILE_FN(name, fmt, value...)                   \
  41 static ssize_t name## _read(struct file *file, char __user *userbuf,    \
  42                             size_t count, loff_t *ppos)                 \
  43 {                                                                       \
  44         struct ieee80211_local *local = file->private_data;             \
  45                                                                         \
  46         return mac80211_format_buffer(userbuf, count, ppos,             \
  47                                       fmt "\n", ##value);               \
  48 }
  49
  50 #define DEBUGFS_READONLY_FILE_OPS(name)                 \
  51 static const struct file_operations name## _ops = {                     \
  52         .read = name## _read,                                           \
  53         .open = mac80211_open_file_generic,                             \
  54         .llseek = generic_file_llseek,                                  \
  55 };
  56
  57 #define DEBUGFS_READONLY_FILE(name, fmt, value...)              \
  58         DEBUGFS_READONLY_FILE_FN(name, fmt, value)              \
  59         DEBUGFS_READONLY_FILE_OPS(name)
  60
  61 #define DEBUGFS_ADD(name)                                               \
  62         debugfs_create_file(#name, 0400, phyd, local, &name## _ops);
  63
  64 #define DEBUGFS_ADD_MODE(name, mode)                                    \
  65         debugfs_create_file(#name, mode, phyd, local, &name## _ops);
  66
  67
  68 DEBUGFS_READONLY_FILE(user_power, "%d",
  69                       local->user_power_level);
  70 DEBUGFS_READONLY_FILE(power, "%d",
  71                       local->hw.conf.power_level);
  72 DEBUGFS_READONLY_FILE(frequency, "%d",
  73                       local->hw.conf.channel->center_freq);
  74 DEBUGFS_READONLY_FILE(total_ps_buffered, "%d",
  75                       local->total_ps_buffered);
  76 DEBUGFS_READONLY_FILE(wep_iv, "%#08x",
  77                       local->wep_iv & 0xffffff);
  78 DEBUGFS_READONLY_FILE(rate_ctrl_alg, "%s",
  79         local->rate_ctrl ? local->rate_ctrl->ops->name : "hw/driver");
  80
  81 static ssize_t tsf_read(struct file *file, char __user *user_buf,
  82                              size_t count, loff_t *ppos)
  83 {
  84         struct ieee80211_local *local = file->private_data;
  85         u64 tsf;
  86
  87         tsf = drv_get_tsf(local);
  88
  89         return mac80211_format_buffer(user_buf, count, ppos, "0x%016llx\n",
  90                                       (unsigned long long) tsf);
  91 }
  92
  93 static ssize_t tsf_write(struct file *file,
  94                          const char __user *user_buf,
  95                          size_t count, loff_t *ppos)
  96 {
  97         struct ieee80211_local *local = file->private_data;
  98         unsigned long long tsf;
  99         char buf[100];
 100         size_t len;
 101
 102         len = min(count, sizeof(buf) - 1);
 103         if (copy_from_user(buf, user_buf, len))
 104                 return -EFAULT;
 105         buf[len] = '\0';
 106
 107         if (strncmp(buf, "reset", 5) == 0) {
 108                 if (local->ops->reset_tsf) {
 109                         drv_reset_tsf(local);
 110                         wiphy_info(local->hw.wiphy, "debugfs reset TSF\n");
 111                 }
 112         } else {
 113                 tsf = simple_strtoul(buf, NULL, 0);
 114                 if (local->ops->set_tsf) {
 115                         drv_set_tsf(local, tsf);
 116                         wiphy_info(local->hw.wiphy,
 117                                    "debugfs set TSF to %#018llx\n", tsf);
 118
 119                 }
 120         }
 121
 122         return count;
 123 }
 124
 125 static const struct file_operations tsf_ops = {
 126         .read = tsf_read,
 127         .write = tsf_write,
 128         .open = mac80211_open_file_generic,
 129         .llseek = default_llseek,
 130 };
 131
 132 static ssize_t reset_write(struct file *file, const char __user *user_buf,
 133                            size_t count, loff_t *ppos)
 134 {
 135         struct ieee80211_local *local = file->private_data;
 136
 137         rtnl_lock();
 138         __ieee80211_suspend(&local->hw, NULL);
 139         __ieee80211_resume(&local->hw);
 140         rtnl_unlock();
 141
 142         return count;
 143 }
 144
 145 static const struct file_operations reset_ops = {
 146         .write = reset_write,
 147         .open = mac80211_open_file_generic,
 148         .llseek = noop_llseek,
 149 };
 150
 151 static ssize_t noack_read(struct file *file, char __user *user_buf,
 152                           size_t count, loff_t *ppos)
 153 {
 154         struct ieee80211_local *local = file->private_data;
 155
 156         return mac80211_format_buffer(user_buf, count, ppos, "%d\n",
 157                                       local->wifi_wme_noack_test);
 158 }
 159
 160 static ssize_t noack_write(struct file *file,
 161                            const char __user *user_buf,
 162                            size_t count, loff_t *ppos)
 163 {
 164         struct ieee80211_local *local = file->private_data;
 165         char buf[10];
 166         size_t len;
 167
 168         len = min(count, sizeof(buf) - 1);
 169         if (copy_from_user(buf, user_buf, len))
 170                 return -EFAULT;
 171         buf[len] = '\0';
 172
 173         local->wifi_wme_noack_test = !!simple_strtoul(buf, NULL, 0);
 174
 175         return count;
 176 }
 177
 178 static const struct file_operations noack_ops = {
 179         .read = noack_read,
 180         .write = noack_write,
 181         .open = mac80211_open_file_generic,
 182         .llseek = default_llseek,
 183 };
 184
 185 static ssize_t uapsd_queues_read(struct file *file, char __user *user_buf,
 186                                  size_t count, loff_t *ppos)
 187 {
 188         struct ieee80211_local *local = file->private_data;
 189         return mac80211_format_buffer(user_buf, count, ppos, "0x%x\n",
 190                                       local->uapsd_queues);
 191 }
 192
 193 static ssize_t uapsd_queues_write(struct file *file,
 194                                   const char __user *user_buf,
 195                                   size_t count, loff_t *ppos)
 196 {
 197         struct ieee80211_local *local = file->private_data;
 198         unsigned long val;
 199         char buf[10];
 200         size_t len;
 201         int ret;
 202
 203         len = min(count, sizeof(buf) - 1);
 204         if (copy_from_user(buf, user_buf, len))
 205                 return -EFAULT;
 206         buf[len] = '\0';
 207
 208         ret = strict_strtoul(buf, 0, &val);
 209
 210         if (ret)
 211                 return -EINVAL;
 212
 213         if (val & ~IEEE80211_WMM_IE_STA_QOSINFO_AC_MASK)
 214                 return -ERANGE;
 215
 216         local->uapsd_queues = val;
 217
 218         return count;
 219 }
 220
 221 static const struct file_operations uapsd_queues_ops = {
 222         .read = uapsd_queues_read,
 223         .write = uapsd_queues_write,
 224         .open = mac80211_open_file_generic,
 225         .llseek = default_llseek,
 226 };
 227
 228 static ssize_t uapsd_max_sp_len_read(struct file *file, char __user *user_buf,
 229                                      size_t count, loff_t *ppos)
 230 {
 231         struct ieee80211_local *local = file->private_data;
 232
 233         return mac80211_format_buffer(user_buf, count, ppos, "0x%x\n",
 234                                       local->uapsd_max_sp_len);
 235 }
 236
 237 static ssize_t uapsd_max_sp_len_write(struct file *file,
 238                                       const char __user *user_buf,
 239                                       size_t count, loff_t *ppos)
 240 {
 241         struct ieee80211_local *local = file->private_data;
 242         unsigned long val;
 243         char buf[10];
 244         size_t len;
 245         int ret;
 246
 247         len = min(count, sizeof(buf) - 1);
 248         if (copy_from_user(buf, user_buf, len))
 249                 return -EFAULT;
 250         buf[len] = '\0';
 251
 252         ret = strict_strtoul(buf, 0, &val);
 253
 254         if (ret)
 255                 return -EINVAL;
 256
 257         if (val & ~IEEE80211_WMM_IE_STA_QOSINFO_SP_MASK)
 258                 return -ERANGE;
 259
 260         local->uapsd_max_sp_len = val;
 261
 262         return count;
 263 }
 264
 265 static const struct file_operations uapsd_max_sp_len_ops = {
 266         .read = uapsd_max_sp_len_read,
 267         .write = uapsd_max_sp_len_write,
 268         .open = mac80211_open_file_generic,
 269         .llseek = default_llseek,
 270 };
 271
 272 static ssize_t channel_type_read(struct file *file, char __user *user_buf,
 273                        size_t count, loff_t *ppos)
 274 {
 275         struct ieee80211_local *local = file->private_data;
 276         const char *buf;
 277
 278         switch (local->hw.conf.channel_type) {
 279         case NL80211_CHAN_NO_HT:
 280                 buf = "no ht\n";
 281                 break;
 282         case NL80211_CHAN_HT20:
 283                 buf = "ht20\n";
 284                 break;
 285         case NL80211_CHAN_HT40MINUS:
 286                 buf = "ht40-\n";
 287                 break;
 288         case NL80211_CHAN_HT40PLUS:
 289                 buf = "ht40+\n";
 290                 break;
 291         default:
 292                 buf = "???";
 293                 break;
 294         }
 295
 296         return simple_read_from_buffer(user_buf, count, ppos, buf, strlen(buf));
 297 }
 298
 299 static ssize_t hwflags_read(struct file *file, char __user *user_buf,
 300                             size_t count, loff_t *ppos)
 301 {
 302         struct ieee80211_local *local = file->private_data;
 303         int mxln = 500;
 304         ssize_t rv;
 305         char *buf = kzalloc(mxln, GFP_KERNEL);
 306         int sf = 0; /* how many written so far */
 307
 308         sf += snprintf(buf, mxln - sf, "0x%x\n", local->hw.flags);
 309         if (local->hw.flags & IEEE80211_HW_HAS_RATE_CONTROL)
 310                 sf += snprintf(buf + sf, mxln - sf, "HAS_RATE_CONTROL\n");
 311         if (local->hw.flags & IEEE80211_HW_RX_INCLUDES_FCS)
 312                 sf += snprintf(buf + sf, mxln - sf, "RX_INCLUDES_FCS\n");
 313         if (local->hw.flags & IEEE80211_HW_HOST_BROADCAST_PS_BUFFERING)
 314                 sf += snprintf(buf + sf, mxln - sf,
 315                                "HOST_BCAST_PS_BUFFERING\n");
 316         if (local->hw.flags & IEEE80211_HW_2GHZ_SHORT_SLOT_INCAPABLE)
 317                 sf += snprintf(buf + sf, mxln - sf,
 318                                "2GHZ_SHORT_SLOT_INCAPABLE\n");
 319         if (local->hw.flags & IEEE80211_HW_2GHZ_SHORT_PREAMBLE_INCAPABLE)
 320                 sf += snprintf(buf + sf, mxln - sf,
 321                                "2GHZ_SHORT_PREAMBLE_INCAPABLE\n");
 322         if (local->hw.flags & IEEE80211_HW_SIGNAL_UNSPEC)
 323                 sf += snprintf(buf + sf, mxln - sf, "SIGNAL_UNSPEC\n");
 324         if (local->hw.flags & IEEE80211_HW_SIGNAL_DBM)
 325                 sf += snprintf(buf + sf, mxln - sf, "SIGNAL_DBM\n");
 326         if (local->hw.flags & IEEE80211_HW_NEED_DTIM_PERIOD)
 327                 sf += snprintf(buf + sf, mxln - sf, "NEED_DTIM_PERIOD\n");
 328         if (local->hw.flags & IEEE80211_HW_SPECTRUM_MGMT)
 329                 sf += snprintf(buf + sf, mxln - sf, "SPECTRUM_MGMT\n");
 330         if (local->hw.flags & IEEE80211_HW_AMPDU_AGGREGATION)
 331                 sf += snprintf(buf + sf, mxln - sf, "AMPDU_AGGREGATION\n");
 332         if (local->hw.flags & IEEE80211_HW_SUPPORTS_PS)
 333                 sf += snprintf(buf + sf, mxln - sf, "SUPPORTS_PS\n");
 334         if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
 335                 sf += snprintf(buf + sf, mxln - sf, "PS_NULLFUNC_STACK\n");
 336         if (local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_PS)
 337                 sf += snprintf(buf + sf, mxln - sf, "SUPPORTS_DYNAMIC_PS\n");
 338         if (local->hw.flags & IEEE80211_HW_MFP_CAPABLE)
 339                 sf += snprintf(buf + sf, mxln - sf, "MFP_CAPABLE\n");
 340         if (local->hw.flags & IEEE80211_HW_BEACON_FILTER)
 341                 sf += snprintf(buf + sf, mxln - sf, "BEACON_FILTER\n");
 342         if (local->hw.flags & IEEE80211_HW_SUPPORTS_STATIC_SMPS)
 343                 sf += snprintf(buf + sf, mxln - sf, "SUPPORTS_STATIC_SMPS\n");
 344         if (local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_SMPS)
 345                 sf += snprintf(buf + sf, mxln - sf, "SUPPORTS_DYNAMIC_SMPS\n");
 346         if (local->hw.flags & IEEE80211_HW_SUPPORTS_UAPSD)
 347                 sf += snprintf(buf + sf, mxln - sf, "SUPPORTS_UAPSD\n");
 348         if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
 349                 sf += snprintf(buf + sf, mxln - sf, "REPORTS_TX_ACK_STATUS\n");
 350         if (local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
 351                 sf += snprintf(buf + sf, mxln - sf, "CONNECTION_MONITOR\n");
 352         if (local->hw.flags & IEEE80211_HW_SUPPORTS_CQM_RSSI)
 353                 sf += snprintf(buf + sf, mxln - sf, "SUPPORTS_CQM_RSSI\n");
 354         if (local->hw.flags & IEEE80211_HW_SUPPORTS_PER_STA_GTK)
 355                 sf += snprintf(buf + sf, mxln - sf, "SUPPORTS_PER_STA_GTK\n");
 356         if (local->hw.flags & IEEE80211_HW_AP_LINK_PS)
 357                 sf += snprintf(buf + sf, mxln - sf, "AP_LINK_PS\n");
 358
 359         rv = simple_read_from_buffer(user_buf, count, ppos, buf, strlen(buf));
 360         kfree(buf);
 361         return rv;
 362 }
 363
 364 static ssize_t queues_read(struct file *file, char __user *user_buf,
 365                            size_t count, loff_t *ppos)
 366 {
 367         struct ieee80211_local *local = file->private_data;
 368         unsigned long flags;
 369         char buf[IEEE80211_MAX_QUEUES * 20];
 370         int q, res = 0;
 371
 372         spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
 373         for (q = 0; q < local->hw.queues; q++)
 374                 res += sprintf(buf + res, "%02d: %#.8lx/%d\n", q,
 375                                 local->queue_stop_reasons[q],
 376                                 skb_queue_len(&local->pending[q]));
 377         spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
 378
 379         return simple_read_from_buffer(user_buf, count, ppos, buf, res);
 380 }
 381
 382 DEBUGFS_READONLY_FILE_OPS(hwflags);
 383 DEBUGFS_READONLY_FILE_OPS(channel_type);
 384 DEBUGFS_READONLY_FILE_OPS(queues);
 385
 386 /* statistics stuff */
 387
 388 static ssize_t format_devstat_counter(struct ieee80211_local *local,
 389         char __user *userbuf,
 390         size_t count, loff_t *ppos,
 391         int (*printvalue)(struct ieee80211_low_level_stats *stats, char *buf,
 392                           int buflen))
 393 {
 394         struct ieee80211_low_level_stats stats;
 395         char buf[20];
 396         int res;
 397
 398         rtnl_lock();
 399         res = drv_get_stats(local, &stats);
 400         rtnl_unlock();
 401         if (res)
 402                 return res;
 403         res = printvalue(&stats, buf, sizeof(buf));
 404         return simple_read_from_buffer(userbuf, count, ppos, buf, res);
 405 }
 406
 407 #define DEBUGFS_DEVSTATS_FILE(name)                                     \
 408 static int print_devstats_##name(struct ieee80211_low_level_stats *stats,\
 409                                  char *buf, int buflen)                 \
 410 {                                                                       \
 411         return scnprintf(buf, buflen, "%u\n", stats->name);             \
 412 }                                                                       \
 413 static ssize_t stats_ ##name## _read(struct file *file,                 \
 414                                      char __user *userbuf,              \
 415                                      size_t count, loff_t *ppos)        \
 416 {                                                                       \
 417         return format_devstat_counter(file->private_data,               \
 418                                       userbuf,                          \
 419                                       count,                            \
 420                                       ppos,                             \
 421                                       print_devstats_##name);           \
 422 }                                                                       \
 423                                                                         \
 424 static const struct file_operations stats_ ##name## _ops = {            \
 425         .read = stats_ ##name## _read,                                  \
 426         .open = mac80211_open_file_generic,                             \
 427         .llseek = generic_file_llseek,                                  \
 428 };
 429
 430 #define DEBUGFS_STATS_ADD(name, field)                                  \
 431         debugfs_create_u32(#name, 0400, statsd, (u32 *) &field);
 432 #define DEBUGFS_DEVSTATS_ADD(name)                                      \
 433         debugfs_create_file(#name, 0400, statsd, local, &stats_ ##name## _ops);
 434
 435 DEBUGFS_DEVSTATS_FILE(dot11ACKFailureCount);
 436 DEBUGFS_DEVSTATS_FILE(dot11RTSFailureCount);
 437 DEBUGFS_DEVSTATS_FILE(dot11FCSErrorCount);
 438 DEBUGFS_DEVSTATS_FILE(dot11RTSSuccessCount);
 439
 440 void debugfs_hw_add(struct ieee80211_local *local)
 441 {
 442         struct dentry *phyd = local->hw.wiphy->debugfsdir;
 443         struct dentry *statsd;
 444
 445         if (!phyd)
 446                 return;
 447
 448         local->debugfs.keys = debugfs_create_dir("keys", phyd);
 449
 450         DEBUGFS_ADD(frequency);
 451         DEBUGFS_ADD(total_ps_buffered);
 452         DEBUGFS_ADD(wep_iv);
 453         DEBUGFS_ADD(tsf);
 454         DEBUGFS_ADD(queues);
 455         DEBUGFS_ADD_MODE(reset, 0200);
 456         DEBUGFS_ADD(noack);
 457         DEBUGFS_ADD(uapsd_queues);
 458         DEBUGFS_ADD(uapsd_max_sp_len);
 459         DEBUGFS_ADD(channel_type);
 460         DEBUGFS_ADD(hwflags);
 461         DEBUGFS_ADD(user_power);
 462         DEBUGFS_ADD(power);
 463
 464         statsd = debugfs_create_dir("statistics", phyd);
 465
 466         /* if the dir failed, don't put all the other things into the root! */
 467         if (!statsd)
 468                 return;
 469
 470         DEBUGFS_STATS_ADD(transmitted_fragment_count,
 471                 local->dot11TransmittedFragmentCount);
 472         DEBUGFS_STATS_ADD(multicast_transmitted_frame_count,
 473                 local->dot11MulticastTransmittedFrameCount);
 474         DEBUGFS_STATS_ADD(failed_count, local->dot11FailedCount);
 475         DEBUGFS_STATS_ADD(retry_count, local->dot11RetryCount);
 476         DEBUGFS_STATS_ADD(multiple_retry_count,
 477                 local->dot11MultipleRetryCount);
 478         DEBUGFS_STATS_ADD(frame_duplicate_count,
 479                 local->dot11FrameDuplicateCount);
 480         DEBUGFS_STATS_ADD(received_fragment_count,
 481                 local->dot11ReceivedFragmentCount);
 482         DEBUGFS_STATS_ADD(multicast_received_frame_count,
 483                 local->dot11MulticastReceivedFrameCount);
 484         DEBUGFS_STATS_ADD(transmitted_frame_count,
 485                 local->dot11TransmittedFrameCount);
 486 #ifdef CONFIG_MAC80211_DEBUG_COUNTERS
 487         DEBUGFS_STATS_ADD(tx_handlers_drop, local->tx_handlers_drop);
 488         DEBUGFS_STATS_ADD(tx_handlers_queued, local->tx_handlers_queued);
 489         DEBUGFS_STATS_ADD(tx_handlers_drop_unencrypted,
 490                 local->tx_handlers_drop_unencrypted);
 491         DEBUGFS_STATS_ADD(tx_handlers_drop_fragment,
 492                 local->tx_handlers_drop_fragment);
 493         DEBUGFS_STATS_ADD(tx_handlers_drop_wep,
 494                 local->tx_handlers_drop_wep);
 495         DEBUGFS_STATS_ADD(tx_handlers_drop_not_assoc,
 496                 local->tx_handlers_drop_not_assoc);
 497         DEBUGFS_STATS_ADD(tx_handlers_drop_unauth_port,
 498                 local->tx_handlers_drop_unauth_port);
 499         DEBUGFS_STATS_ADD(rx_handlers_drop, local->rx_handlers_drop);
 500         DEBUGFS_STATS_ADD(rx_handlers_queued, local->rx_handlers_queued);
 501         DEBUGFS_STATS_ADD(rx_handlers_drop_nullfunc,
 502                 local->rx_handlers_drop_nullfunc);
 503         DEBUGFS_STATS_ADD(rx_handlers_drop_defrag,
 504                 local->rx_handlers_drop_defrag);
 505         DEBUGFS_STATS_ADD(rx_handlers_drop_short,
 506                 local->rx_handlers_drop_short);
 507         DEBUGFS_STATS_ADD(rx_handlers_drop_passive_scan,
 508                 local->rx_handlers_drop_passive_scan);
 509         DEBUGFS_STATS_ADD(tx_expand_skb_head,
 510                 local->tx_expand_skb_head);
 511         DEBUGFS_STATS_ADD(tx_expand_skb_head_cloned,
 512                 local->tx_expand_skb_head_cloned);
 513         DEBUGFS_STATS_ADD(rx_expand_skb_head,
 514                 local->rx_expand_skb_head);
 515         DEBUGFS_STATS_ADD(rx_expand_skb_head2,
 516                 local->rx_expand_skb_head2);
 517         DEBUGFS_STATS_ADD(rx_handlers_fragments,
 518                 local->rx_handlers_fragments);
 519         DEBUGFS_STATS_ADD(tx_status_drop,
 520                 local->tx_status_drop);
 521 #endif
 522         DEBUGFS_DEVSTATS_ADD(dot11ACKFailureCount);
 523         DEBUGFS_DEVSTATS_ADD(dot11RTSFailureCount);
 524         DEBUGFS_DEVSTATS_ADD(dot11FCSErrorCount);
 525         DEBUGFS_DEVSTATS_ADD(dot11RTSSuccessCount);
 526 }