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         u8 val;
 199         int ret;
 200
 201         ret = kstrtou8_from_user(user_buf, count, 0, &val);
 202         if (ret)
 203                 return ret;
 204
 205         if (val & ~IEEE80211_WMM_IE_STA_QOSINFO_AC_MASK)
 206                 return -ERANGE;
 207
 208         local->uapsd_queues = val;
 209
 210         return count;
 211 }
 212
 213 static const struct file_operations uapsd_queues_ops = {
 214         .read = uapsd_queues_read,
 215         .write = uapsd_queues_write,
 216         .open = mac80211_open_file_generic,
 217         .llseek = default_llseek,
 218 };
 219
 220 static ssize_t uapsd_max_sp_len_read(struct file *file, char __user *user_buf,
 221                                      size_t count, loff_t *ppos)
 222 {
 223         struct ieee80211_local *local = file->private_data;
 224
 225         return mac80211_format_buffer(user_buf, count, ppos, "0x%x\n",
 226                                       local->uapsd_max_sp_len);
 227 }
 228
 229 static ssize_t uapsd_max_sp_len_write(struct file *file,
 230                                       const char __user *user_buf,
 231                                       size_t count, loff_t *ppos)
 232 {
 233         struct ieee80211_local *local = file->private_data;
 234         unsigned long val;
 235         char buf[10];
 236         size_t len;
 237         int ret;
 238
 239         len = min(count, sizeof(buf) - 1);
 240         if (copy_from_user(buf, user_buf, len))
 241                 return -EFAULT;
 242         buf[len] = '\0';
 243
 244         ret = strict_strtoul(buf, 0, &val);
 245
 246         if (ret)
 247                 return -EINVAL;
 248
 249         if (val & ~IEEE80211_WMM_IE_STA_QOSINFO_SP_MASK)
 250                 return -ERANGE;
 251
 252         local->uapsd_max_sp_len = val;
 253
 254         return count;
 255 }
 256
 257 static const struct file_operations uapsd_max_sp_len_ops = {
 258         .read = uapsd_max_sp_len_read,
 259         .write = uapsd_max_sp_len_write,
 260         .open = mac80211_open_file_generic,
 261         .llseek = default_llseek,
 262 };
 263
 264 static ssize_t channel_type_read(struct file *file, char __user *user_buf,
 265                        size_t count, loff_t *ppos)
 266 {
 267         struct ieee80211_local *local = file->private_data;
 268         const char *buf;
 269
 270         switch (local->hw.conf.channel_type) {
 271         case NL80211_CHAN_NO_HT:
 272                 buf = "no ht\n";
 273                 break;
 274         case NL80211_CHAN_HT20:
 275                 buf = "ht20\n";
 276                 break;
 277         case NL80211_CHAN_HT40MINUS:
 278                 buf = "ht40-\n";
 279                 break;
 280         case NL80211_CHAN_HT40PLUS:
 281                 buf = "ht40+\n";
 282                 break;
 283         default:
 284                 buf = "???";
 285                 break;
 286         }
 287
 288         return simple_read_from_buffer(user_buf, count, ppos, buf, strlen(buf));
 289 }
 290
 291 static ssize_t hwflags_read(struct file *file, char __user *user_buf,
 292                             size_t count, loff_t *ppos)
 293 {
 294         struct ieee80211_local *local = file->private_data;
 295         int mxln = 500;
 296         ssize_t rv;
 297         char *buf = kzalloc(mxln, GFP_KERNEL);
 298         int sf = 0; /* how many written so far */
 299
 300         sf += snprintf(buf, mxln - sf, "0x%x\n", local->hw.flags);
 301         if (local->hw.flags & IEEE80211_HW_HAS_RATE_CONTROL)
 302                 sf += snprintf(buf + sf, mxln - sf, "HAS_RATE_CONTROL\n");
 303         if (local->hw.flags & IEEE80211_HW_RX_INCLUDES_FCS)
 304                 sf += snprintf(buf + sf, mxln - sf, "RX_INCLUDES_FCS\n");
 305         if (local->hw.flags & IEEE80211_HW_HOST_BROADCAST_PS_BUFFERING)
 306                 sf += snprintf(buf + sf, mxln - sf,
 307                                "HOST_BCAST_PS_BUFFERING\n");
 308         if (local->hw.flags & IEEE80211_HW_2GHZ_SHORT_SLOT_INCAPABLE)
 309                 sf += snprintf(buf + sf, mxln - sf,
 310                                "2GHZ_SHORT_SLOT_INCAPABLE\n");
 311         if (local->hw.flags & IEEE80211_HW_2GHZ_SHORT_PREAMBLE_INCAPABLE)
 312                 sf += snprintf(buf + sf, mxln - sf,
 313                                "2GHZ_SHORT_PREAMBLE_INCAPABLE\n");
 314         if (local->hw.flags & IEEE80211_HW_SIGNAL_UNSPEC)
 315                 sf += snprintf(buf + sf, mxln - sf, "SIGNAL_UNSPEC\n");
 316         if (local->hw.flags & IEEE80211_HW_SIGNAL_DBM)
 317                 sf += snprintf(buf + sf, mxln - sf, "SIGNAL_DBM\n");
 318         if (local->hw.flags & IEEE80211_HW_NEED_DTIM_PERIOD)
 319                 sf += snprintf(buf + sf, mxln - sf, "NEED_DTIM_PERIOD\n");
 320         if (local->hw.flags & IEEE80211_HW_SPECTRUM_MGMT)
 321                 sf += snprintf(buf + sf, mxln - sf, "SPECTRUM_MGMT\n");
 322         if (local->hw.flags & IEEE80211_HW_AMPDU_AGGREGATION)
 323                 sf += snprintf(buf + sf, mxln - sf, "AMPDU_AGGREGATION\n");
 324         if (local->hw.flags & IEEE80211_HW_SUPPORTS_PS)
 325                 sf += snprintf(buf + sf, mxln - sf, "SUPPORTS_PS\n");
 326         if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
 327                 sf += snprintf(buf + sf, mxln - sf, "PS_NULLFUNC_STACK\n");
 328         if (local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_PS)
 329                 sf += snprintf(buf + sf, mxln - sf, "SUPPORTS_DYNAMIC_PS\n");
 330         if (local->hw.flags & IEEE80211_HW_MFP_CAPABLE)
 331                 sf += snprintf(buf + sf, mxln - sf, "MFP_CAPABLE\n");
 332         if (local->hw.flags & IEEE80211_HW_BEACON_FILTER)
 333                 sf += snprintf(buf + sf, mxln - sf, "BEACON_FILTER\n");
 334         if (local->hw.flags & IEEE80211_HW_SUPPORTS_STATIC_SMPS)
 335                 sf += snprintf(buf + sf, mxln - sf, "SUPPORTS_STATIC_SMPS\n");
 336         if (local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_SMPS)
 337                 sf += snprintf(buf + sf, mxln - sf, "SUPPORTS_DYNAMIC_SMPS\n");
 338         if (local->hw.flags & IEEE80211_HW_SUPPORTS_UAPSD)
 339                 sf += snprintf(buf + sf, mxln - sf, "SUPPORTS_UAPSD\n");
 340         if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
 341                 sf += snprintf(buf + sf, mxln - sf, "REPORTS_TX_ACK_STATUS\n");
 342         if (local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
 343                 sf += snprintf(buf + sf, mxln - sf, "CONNECTION_MONITOR\n");
 344         if (local->hw.flags & IEEE80211_HW_SUPPORTS_CQM_RSSI)
 345                 sf += snprintf(buf + sf, mxln - sf, "SUPPORTS_CQM_RSSI\n");
 346         if (local->hw.flags & IEEE80211_HW_SUPPORTS_PER_STA_GTK)
 347                 sf += snprintf(buf + sf, mxln - sf, "SUPPORTS_PER_STA_GTK\n");
 348         if (local->hw.flags & IEEE80211_HW_AP_LINK_PS)
 349                 sf += snprintf(buf + sf, mxln - sf, "AP_LINK_PS\n");
 350
 351         rv = simple_read_from_buffer(user_buf, count, ppos, buf, strlen(buf));
 352         kfree(buf);
 353         return rv;
 354 }
 355
 356 static ssize_t queues_read(struct file *file, char __user *user_buf,
 357                            size_t count, loff_t *ppos)
 358 {
 359         struct ieee80211_local *local = file->private_data;
 360         unsigned long flags;
 361         char buf[IEEE80211_MAX_QUEUES * 20];
 362         int q, res = 0;
 363
 364         spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
 365         for (q = 0; q < local->hw.queues; q++)
 366                 res += sprintf(buf + res, "%02d: %#.8lx/%d\n", q,
 367                                 local->queue_stop_reasons[q],
 368                                 skb_queue_len(&local->pending[q]));
 369         spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
 370
 371         return simple_read_from_buffer(user_buf, count, ppos, buf, res);
 372 }
 373
 374 DEBUGFS_READONLY_FILE_OPS(hwflags);
 375 DEBUGFS_READONLY_FILE_OPS(channel_type);
 376 DEBUGFS_READONLY_FILE_OPS(queues);
 377
 378 /* statistics stuff */
 379
 380 static ssize_t format_devstat_counter(struct ieee80211_local *local,
 381         char __user *userbuf,
 382         size_t count, loff_t *ppos,
 383         int (*printvalue)(struct ieee80211_low_level_stats *stats, char *buf,
 384                           int buflen))
 385 {
 386         struct ieee80211_low_level_stats stats;
 387         char buf[20];
 388         int res;
 389
 390         rtnl_lock();
 391         res = drv_get_stats(local, &stats);
 392         rtnl_unlock();
 393         if (res)
 394                 return res;
 395         res = printvalue(&stats, buf, sizeof(buf));
 396         return simple_read_from_buffer(userbuf, count, ppos, buf, res);
 397 }
 398
 399 #define DEBUGFS_DEVSTATS_FILE(name)                                     \
 400 static int print_devstats_##name(struct ieee80211_low_level_stats *stats,\
 401                                  char *buf, int buflen)                 \
 402 {                                                                       \
 403         return scnprintf(buf, buflen, "%u\n", stats->name);             \
 404 }                                                                       \
 405 static ssize_t stats_ ##name## _read(struct file *file,                 \
 406                                      char __user *userbuf,              \
 407                                      size_t count, loff_t *ppos)        \
 408 {                                                                       \
 409         return format_devstat_counter(file->private_data,               \
 410                                       userbuf,                          \
 411                                       count,                            \
 412                                       ppos,                             \
 413                                       print_devstats_##name);           \
 414 }                                                                       \
 415                                                                         \
 416 static const struct file_operations stats_ ##name## _ops = {            \
 417         .read = stats_ ##name## _read,                                  \
 418         .open = mac80211_open_file_generic,                             \
 419         .llseek = generic_file_llseek,                                  \
 420 };
 421
 422 #define DEBUGFS_STATS_ADD(name, field)                                  \
 423         debugfs_create_u32(#name, 0400, statsd, (u32 *) &field);
 424 #define DEBUGFS_DEVSTATS_ADD(name)                                      \
 425         debugfs_create_file(#name, 0400, statsd, local, &stats_ ##name## _ops);
 426
 427 DEBUGFS_DEVSTATS_FILE(dot11ACKFailureCount);
 428 DEBUGFS_DEVSTATS_FILE(dot11RTSFailureCount);
 429 DEBUGFS_DEVSTATS_FILE(dot11FCSErrorCount);
 430 DEBUGFS_DEVSTATS_FILE(dot11RTSSuccessCount);
 431
 432 void debugfs_hw_add(struct ieee80211_local *local)
 433 {
 434         struct dentry *phyd = local->hw.wiphy->debugfsdir;
 435         struct dentry *statsd;
 436
 437         if (!phyd)
 438                 return;
 439
 440         local->debugfs.keys = debugfs_create_dir("keys", phyd);
 441
 442         DEBUGFS_ADD(frequency);
 443         DEBUGFS_ADD(total_ps_buffered);
 444         DEBUGFS_ADD(wep_iv);
 445         DEBUGFS_ADD(tsf);
 446         DEBUGFS_ADD(queues);
 447         DEBUGFS_ADD_MODE(reset, 0200);
 448         DEBUGFS_ADD(noack);
 449         DEBUGFS_ADD(uapsd_queues);
 450         DEBUGFS_ADD(uapsd_max_sp_len);
 451         DEBUGFS_ADD(channel_type);
 452         DEBUGFS_ADD(hwflags);
 453         DEBUGFS_ADD(user_power);
 454         DEBUGFS_ADD(power);
 455
 456         statsd = debugfs_create_dir("statistics", phyd);
 457
 458         /* if the dir failed, don't put all the other things into the root! */
 459         if (!statsd)
 460                 return;
 461
 462         DEBUGFS_STATS_ADD(transmitted_fragment_count,
 463                 local->dot11TransmittedFragmentCount);
 464         DEBUGFS_STATS_ADD(multicast_transmitted_frame_count,
 465                 local->dot11MulticastTransmittedFrameCount);
 466         DEBUGFS_STATS_ADD(failed_count, local->dot11FailedCount);
 467         DEBUGFS_STATS_ADD(retry_count, local->dot11RetryCount);
 468         DEBUGFS_STATS_ADD(multiple_retry_count,
 469                 local->dot11MultipleRetryCount);
 470         DEBUGFS_STATS_ADD(frame_duplicate_count,
 471                 local->dot11FrameDuplicateCount);
 472         DEBUGFS_STATS_ADD(received_fragment_count,
 473                 local->dot11ReceivedFragmentCount);
 474         DEBUGFS_STATS_ADD(multicast_received_frame_count,
 475                 local->dot11MulticastReceivedFrameCount);
 476         DEBUGFS_STATS_ADD(transmitted_frame_count,
 477                 local->dot11TransmittedFrameCount);
 478 #ifdef CONFIG_MAC80211_DEBUG_COUNTERS
 479         DEBUGFS_STATS_ADD(tx_handlers_drop, local->tx_handlers_drop);
 480         DEBUGFS_STATS_ADD(tx_handlers_queued, local->tx_handlers_queued);
 481         DEBUGFS_STATS_ADD(tx_handlers_drop_unencrypted,
 482                 local->tx_handlers_drop_unencrypted);
 483         DEBUGFS_STATS_ADD(tx_handlers_drop_fragment,
 484                 local->tx_handlers_drop_fragment);
 485         DEBUGFS_STATS_ADD(tx_handlers_drop_wep,
 486                 local->tx_handlers_drop_wep);
 487         DEBUGFS_STATS_ADD(tx_handlers_drop_not_assoc,
 488                 local->tx_handlers_drop_not_assoc);
 489         DEBUGFS_STATS_ADD(tx_handlers_drop_unauth_port,
 490                 local->tx_handlers_drop_unauth_port);
 491         DEBUGFS_STATS_ADD(rx_handlers_drop, local->rx_handlers_drop);
 492         DEBUGFS_STATS_ADD(rx_handlers_queued, local->rx_handlers_queued);
 493         DEBUGFS_STATS_ADD(rx_handlers_drop_nullfunc,
 494                 local->rx_handlers_drop_nullfunc);
 495         DEBUGFS_STATS_ADD(rx_handlers_drop_defrag,
 496                 local->rx_handlers_drop_defrag);
 497         DEBUGFS_STATS_ADD(rx_handlers_drop_short,
 498                 local->rx_handlers_drop_short);
 499         DEBUGFS_STATS_ADD(rx_handlers_drop_passive_scan,
 500                 local->rx_handlers_drop_passive_scan);
 501         DEBUGFS_STATS_ADD(tx_expand_skb_head,
 502                 local->tx_expand_skb_head);
 503         DEBUGFS_STATS_ADD(tx_expand_skb_head_cloned,
 504                 local->tx_expand_skb_head_cloned);
 505         DEBUGFS_STATS_ADD(rx_expand_skb_head,
 506                 local->rx_expand_skb_head);
 507         DEBUGFS_STATS_ADD(rx_expand_skb_head2,
 508                 local->rx_expand_skb_head2);
 509         DEBUGFS_STATS_ADD(rx_handlers_fragments,
 510                 local->rx_handlers_fragments);
 511         DEBUGFS_STATS_ADD(tx_status_drop,
 512                 local->tx_status_drop);
 513 #endif
 514         DEBUGFS_DEVSTATS_ADD(dot11ACKFailureCount);
 515         DEBUGFS_DEVSTATS_ADD(dot11RTSFailureCount);
 516         DEBUGFS_DEVSTATS_ADD(dot11FCSErrorCount);
 517         DEBUGFS_DEVSTATS_ADD(dot11RTSSuccessCount);
 518 }