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 reset_write(struct file *file, const char __user *user_buf,
  82                            size_t count, loff_t *ppos)
  83 {
  84         struct ieee80211_local *local = file->private_data;
  85
  86         rtnl_lock();
  87         __ieee80211_suspend(&local->hw, NULL);
  88         __ieee80211_resume(&local->hw);
  89         rtnl_unlock();
  90
  91         return count;
  92 }
  93
  94 static const struct file_operations reset_ops = {
  95         .write = reset_write,
  96         .open = mac80211_open_file_generic,
  97         .llseek = noop_llseek,
  98 };
  99
 100 static ssize_t noack_read(struct file *file, char __user *user_buf,
 101                           size_t count, loff_t *ppos)
 102 {
 103         struct ieee80211_local *local = file->private_data;
 104
 105         return mac80211_format_buffer(user_buf, count, ppos, "%d\n",
 106                                       local->wifi_wme_noack_test);
 107 }
 108
 109 static ssize_t noack_write(struct file *file,
 110                            const char __user *user_buf,
 111                            size_t count, loff_t *ppos)
 112 {
 113         struct ieee80211_local *local = file->private_data;
 114         char buf[10];
 115         size_t len;
 116
 117         len = min(count, sizeof(buf) - 1);
 118         if (copy_from_user(buf, user_buf, len))
 119                 return -EFAULT;
 120         buf[len] = '\0';
 121
 122         local->wifi_wme_noack_test = !!simple_strtoul(buf, NULL, 0);
 123
 124         return count;
 125 }
 126
 127 static const struct file_operations noack_ops = {
 128         .read = noack_read,
 129         .write = noack_write,
 130         .open = mac80211_open_file_generic,
 131         .llseek = default_llseek,
 132 };
 133
 134 static ssize_t uapsd_queues_read(struct file *file, char __user *user_buf,
 135                                  size_t count, loff_t *ppos)
 136 {
 137         struct ieee80211_local *local = file->private_data;
 138         return mac80211_format_buffer(user_buf, count, ppos, "0x%x\n",
 139                                       local->uapsd_queues);
 140 }
 141
 142 static ssize_t uapsd_queues_write(struct file *file,
 143                                   const char __user *user_buf,
 144                                   size_t count, loff_t *ppos)
 145 {
 146         struct ieee80211_local *local = file->private_data;
 147         u8 val;
 148         int ret;
 149
 150         ret = kstrtou8_from_user(user_buf, count, 0, &val);
 151         if (ret)
 152                 return ret;
 153
 154         if (val & ~IEEE80211_WMM_IE_STA_QOSINFO_AC_MASK)
 155                 return -ERANGE;
 156
 157         local->uapsd_queues = val;
 158
 159         return count;
 160 }
 161
 162 static const struct file_operations uapsd_queues_ops = {
 163         .read = uapsd_queues_read,
 164         .write = uapsd_queues_write,
 165         .open = mac80211_open_file_generic,
 166         .llseek = default_llseek,
 167 };
 168
 169 static ssize_t uapsd_max_sp_len_read(struct file *file, char __user *user_buf,
 170                                      size_t count, loff_t *ppos)
 171 {
 172         struct ieee80211_local *local = file->private_data;
 173
 174         return mac80211_format_buffer(user_buf, count, ppos, "0x%x\n",
 175                                       local->uapsd_max_sp_len);
 176 }
 177
 178 static ssize_t uapsd_max_sp_len_write(struct file *file,
 179                                       const char __user *user_buf,
 180                                       size_t count, loff_t *ppos)
 181 {
 182         struct ieee80211_local *local = file->private_data;
 183         unsigned long val;
 184         char buf[10];
 185         size_t len;
 186         int ret;
 187
 188         len = min(count, sizeof(buf) - 1);
 189         if (copy_from_user(buf, user_buf, len))
 190                 return -EFAULT;
 191         buf[len] = '\0';
 192
 193         ret = strict_strtoul(buf, 0, &val);
 194
 195         if (ret)
 196                 return -EINVAL;
 197
 198         if (val & ~IEEE80211_WMM_IE_STA_QOSINFO_SP_MASK)
 199                 return -ERANGE;
 200
 201         local->uapsd_max_sp_len = val;
 202
 203         return count;
 204 }
 205
 206 static const struct file_operations uapsd_max_sp_len_ops = {
 207         .read = uapsd_max_sp_len_read,
 208         .write = uapsd_max_sp_len_write,
 209         .open = mac80211_open_file_generic,
 210         .llseek = default_llseek,
 211 };
 212
 213 static ssize_t channel_type_read(struct file *file, char __user *user_buf,
 214                        size_t count, loff_t *ppos)
 215 {
 216         struct ieee80211_local *local = file->private_data;
 217         const char *buf;
 218
 219         switch (local->hw.conf.channel_type) {
 220         case NL80211_CHAN_NO_HT:
 221                 buf = "no ht\n";
 222                 break;
 223         case NL80211_CHAN_HT20:
 224                 buf = "ht20\n";
 225                 break;
 226         case NL80211_CHAN_HT40MINUS:
 227                 buf = "ht40-\n";
 228                 break;
 229         case NL80211_CHAN_HT40PLUS:
 230                 buf = "ht40+\n";
 231                 break;
 232         default:
 233                 buf = "???";
 234                 break;
 235         }
 236
 237         return simple_read_from_buffer(user_buf, count, ppos, buf, strlen(buf));
 238 }
 239
 240 static ssize_t hwflags_read(struct file *file, char __user *user_buf,
 241                             size_t count, loff_t *ppos)
 242 {
 243         struct ieee80211_local *local = file->private_data;
 244         int mxln = 500;
 245         ssize_t rv;
 246         char *buf = kzalloc(mxln, GFP_KERNEL);
 247         int sf = 0; /* how many written so far */
 248
 249         if (!buf)
 250                 return 0;
 251
 252         sf += snprintf(buf, mxln - sf, "0x%x\n", local->hw.flags);
 253         if (local->hw.flags & IEEE80211_HW_HAS_RATE_CONTROL)
 254                 sf += snprintf(buf + sf, mxln - sf, "HAS_RATE_CONTROL\n");
 255         if (local->hw.flags & IEEE80211_HW_RX_INCLUDES_FCS)
 256                 sf += snprintf(buf + sf, mxln - sf, "RX_INCLUDES_FCS\n");
 257         if (local->hw.flags & IEEE80211_HW_HOST_BROADCAST_PS_BUFFERING)
 258                 sf += snprintf(buf + sf, mxln - sf,
 259                                "HOST_BCAST_PS_BUFFERING\n");
 260         if (local->hw.flags & IEEE80211_HW_2GHZ_SHORT_SLOT_INCAPABLE)
 261                 sf += snprintf(buf + sf, mxln - sf,
 262                                "2GHZ_SHORT_SLOT_INCAPABLE\n");
 263         if (local->hw.flags & IEEE80211_HW_2GHZ_SHORT_PREAMBLE_INCAPABLE)
 264                 sf += snprintf(buf + sf, mxln - sf,
 265                                "2GHZ_SHORT_PREAMBLE_INCAPABLE\n");
 266         if (local->hw.flags & IEEE80211_HW_SIGNAL_UNSPEC)
 267                 sf += snprintf(buf + sf, mxln - sf, "SIGNAL_UNSPEC\n");
 268         if (local->hw.flags & IEEE80211_HW_SIGNAL_DBM)
 269                 sf += snprintf(buf + sf, mxln - sf, "SIGNAL_DBM\n");
 270         if (local->hw.flags & IEEE80211_HW_NEED_DTIM_PERIOD)
 271                 sf += snprintf(buf + sf, mxln - sf, "NEED_DTIM_PERIOD\n");
 272         if (local->hw.flags & IEEE80211_HW_SPECTRUM_MGMT)
 273                 sf += snprintf(buf + sf, mxln - sf, "SPECTRUM_MGMT\n");
 274         if (local->hw.flags & IEEE80211_HW_AMPDU_AGGREGATION)
 275                 sf += snprintf(buf + sf, mxln - sf, "AMPDU_AGGREGATION\n");
 276         if (local->hw.flags & IEEE80211_HW_SUPPORTS_PS)
 277                 sf += snprintf(buf + sf, mxln - sf, "SUPPORTS_PS\n");
 278         if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
 279                 sf += snprintf(buf + sf, mxln - sf, "PS_NULLFUNC_STACK\n");
 280         if (local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_PS)
 281                 sf += snprintf(buf + sf, mxln - sf, "SUPPORTS_DYNAMIC_PS\n");
 282         if (local->hw.flags & IEEE80211_HW_MFP_CAPABLE)
 283                 sf += snprintf(buf + sf, mxln - sf, "MFP_CAPABLE\n");
 284         if (local->hw.flags & IEEE80211_HW_BEACON_FILTER)
 285                 sf += snprintf(buf + sf, mxln - sf, "BEACON_FILTER\n");
 286         if (local->hw.flags & IEEE80211_HW_SUPPORTS_STATIC_SMPS)
 287                 sf += snprintf(buf + sf, mxln - sf, "SUPPORTS_STATIC_SMPS\n");
 288         if (local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_SMPS)
 289                 sf += snprintf(buf + sf, mxln - sf, "SUPPORTS_DYNAMIC_SMPS\n");
 290         if (local->hw.flags & IEEE80211_HW_SUPPORTS_UAPSD)
 291                 sf += snprintf(buf + sf, mxln - sf, "SUPPORTS_UAPSD\n");
 292         if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
 293                 sf += snprintf(buf + sf, mxln - sf, "REPORTS_TX_ACK_STATUS\n");
 294         if (local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
 295                 sf += snprintf(buf + sf, mxln - sf, "CONNECTION_MONITOR\n");
 296         if (local->hw.flags & IEEE80211_HW_SUPPORTS_CQM_RSSI)
 297                 sf += snprintf(buf + sf, mxln - sf, "SUPPORTS_CQM_RSSI\n");
 298         if (local->hw.flags & IEEE80211_HW_SUPPORTS_PER_STA_GTK)
 299                 sf += snprintf(buf + sf, mxln - sf, "SUPPORTS_PER_STA_GTK\n");
 300         if (local->hw.flags & IEEE80211_HW_AP_LINK_PS)
 301                 sf += snprintf(buf + sf, mxln - sf, "AP_LINK_PS\n");
 302         if (local->hw.flags & IEEE80211_HW_TX_AMPDU_SETUP_IN_HW)
 303                 sf += snprintf(buf + sf, mxln - sf, "TX_AMPDU_SETUP_IN_HW\n");
 304
 305         rv = simple_read_from_buffer(user_buf, count, ppos, buf, strlen(buf));
 306         kfree(buf);
 307         return rv;
 308 }
 309
 310 static ssize_t queues_read(struct file *file, char __user *user_buf,
 311                            size_t count, loff_t *ppos)
 312 {
 313         struct ieee80211_local *local = file->private_data;
 314         unsigned long flags;
 315         char buf[IEEE80211_MAX_QUEUES * 20];
 316         int q, res = 0;
 317
 318         spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
 319         for (q = 0; q < local->hw.queues; q++)
 320                 res += sprintf(buf + res, "%02d: %#.8lx/%d\n", q,
 321                                 local->queue_stop_reasons[q],
 322                                 skb_queue_len(&local->pending[q]));
 323         spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
 324
 325         return simple_read_from_buffer(user_buf, count, ppos, buf, res);
 326 }
 327
 328 DEBUGFS_READONLY_FILE_OPS(hwflags);
 329 DEBUGFS_READONLY_FILE_OPS(channel_type);
 330 DEBUGFS_READONLY_FILE_OPS(queues);
 331
 332 /* statistics stuff */
 333
 334 static ssize_t format_devstat_counter(struct ieee80211_local *local,
 335         char __user *userbuf,
 336         size_t count, loff_t *ppos,
 337         int (*printvalue)(struct ieee80211_low_level_stats *stats, char *buf,
 338                           int buflen))
 339 {
 340         struct ieee80211_low_level_stats stats;
 341         char buf[20];
 342         int res;
 343
 344         rtnl_lock();
 345         res = drv_get_stats(local, &stats);
 346         rtnl_unlock();
 347         if (res)
 348                 return res;
 349         res = printvalue(&stats, buf, sizeof(buf));
 350         return simple_read_from_buffer(userbuf, count, ppos, buf, res);
 351 }
 352
 353 #define DEBUGFS_DEVSTATS_FILE(name)                                     \
 354 static int print_devstats_##name(struct ieee80211_low_level_stats *stats,\
 355                                  char *buf, int buflen)                 \
 356 {                                                                       \
 357         return scnprintf(buf, buflen, "%u\n", stats->name);             \
 358 }                                                                       \
 359 static ssize_t stats_ ##name## _read(struct file *file,                 \
 360                                      char __user *userbuf,              \
 361                                      size_t count, loff_t *ppos)        \
 362 {                                                                       \
 363         return format_devstat_counter(file->private_data,               \
 364                                       userbuf,                          \
 365                                       count,                            \
 366                                       ppos,                             \
 367                                       print_devstats_##name);           \
 368 }                                                                       \
 369                                                                         \
 370 static const struct file_operations stats_ ##name## _ops = {            \
 371         .read = stats_ ##name## _read,                                  \
 372         .open = mac80211_open_file_generic,                             \
 373         .llseek = generic_file_llseek,                                  \
 374 };
 375
 376 #define DEBUGFS_STATS_ADD(name, field)                                  \
 377         debugfs_create_u32(#name, 0400, statsd, (u32 *) &field);
 378 #define DEBUGFS_DEVSTATS_ADD(name)                                      \
 379         debugfs_create_file(#name, 0400, statsd, local, &stats_ ##name## _ops);
 380
 381 DEBUGFS_DEVSTATS_FILE(dot11ACKFailureCount);
 382 DEBUGFS_DEVSTATS_FILE(dot11RTSFailureCount);
 383 DEBUGFS_DEVSTATS_FILE(dot11FCSErrorCount);
 384 DEBUGFS_DEVSTATS_FILE(dot11RTSSuccessCount);
 385
 386 void debugfs_hw_add(struct ieee80211_local *local)
 387 {
 388         struct dentry *phyd = local->hw.wiphy->debugfsdir;
 389         struct dentry *statsd;
 390
 391         if (!phyd)
 392                 return;
 393
 394         local->debugfs.keys = debugfs_create_dir("keys", phyd);
 395
 396         DEBUGFS_ADD(frequency);
 397         DEBUGFS_ADD(total_ps_buffered);
 398         DEBUGFS_ADD(wep_iv);
 399         DEBUGFS_ADD(queues);
 400         DEBUGFS_ADD_MODE(reset, 0200);
 401         DEBUGFS_ADD(noack);
 402         DEBUGFS_ADD(uapsd_queues);
 403         DEBUGFS_ADD(uapsd_max_sp_len);
 404         DEBUGFS_ADD(channel_type);
 405         DEBUGFS_ADD(hwflags);
 406         DEBUGFS_ADD(user_power);
 407         DEBUGFS_ADD(power);
 408
 409         statsd = debugfs_create_dir("statistics", phyd);
 410
 411         /* if the dir failed, don't put all the other things into the root! */
 412         if (!statsd)
 413                 return;
 414
 415         DEBUGFS_STATS_ADD(transmitted_fragment_count,
 416                 local->dot11TransmittedFragmentCount);
 417         DEBUGFS_STATS_ADD(multicast_transmitted_frame_count,
 418                 local->dot11MulticastTransmittedFrameCount);
 419         DEBUGFS_STATS_ADD(failed_count, local->dot11FailedCount);
 420         DEBUGFS_STATS_ADD(retry_count, local->dot11RetryCount);
 421         DEBUGFS_STATS_ADD(multiple_retry_count,
 422                 local->dot11MultipleRetryCount);
 423         DEBUGFS_STATS_ADD(frame_duplicate_count,
 424                 local->dot11FrameDuplicateCount);
 425         DEBUGFS_STATS_ADD(received_fragment_count,
 426                 local->dot11ReceivedFragmentCount);
 427         DEBUGFS_STATS_ADD(multicast_received_frame_count,
 428                 local->dot11MulticastReceivedFrameCount);
 429         DEBUGFS_STATS_ADD(transmitted_frame_count,
 430                 local->dot11TransmittedFrameCount);
 431 #ifdef CONFIG_MAC80211_DEBUG_COUNTERS
 432         DEBUGFS_STATS_ADD(tx_handlers_drop, local->tx_handlers_drop);
 433         DEBUGFS_STATS_ADD(tx_handlers_queued, local->tx_handlers_queued);
 434         DEBUGFS_STATS_ADD(tx_handlers_drop_unencrypted,
 435                 local->tx_handlers_drop_unencrypted);
 436         DEBUGFS_STATS_ADD(tx_handlers_drop_fragment,
 437                 local->tx_handlers_drop_fragment);
 438         DEBUGFS_STATS_ADD(tx_handlers_drop_wep,
 439                 local->tx_handlers_drop_wep);
 440         DEBUGFS_STATS_ADD(tx_handlers_drop_not_assoc,
 441                 local->tx_handlers_drop_not_assoc);
 442         DEBUGFS_STATS_ADD(tx_handlers_drop_unauth_port,
 443                 local->tx_handlers_drop_unauth_port);
 444         DEBUGFS_STATS_ADD(rx_handlers_drop, local->rx_handlers_drop);
 445         DEBUGFS_STATS_ADD(rx_handlers_queued, local->rx_handlers_queued);
 446         DEBUGFS_STATS_ADD(rx_handlers_drop_nullfunc,
 447                 local->rx_handlers_drop_nullfunc);
 448         DEBUGFS_STATS_ADD(rx_handlers_drop_defrag,
 449                 local->rx_handlers_drop_defrag);
 450         DEBUGFS_STATS_ADD(rx_handlers_drop_short,
 451                 local->rx_handlers_drop_short);
 452         DEBUGFS_STATS_ADD(rx_handlers_drop_passive_scan,
 453                 local->rx_handlers_drop_passive_scan);
 454         DEBUGFS_STATS_ADD(tx_expand_skb_head,
 455                 local->tx_expand_skb_head);
 456         DEBUGFS_STATS_ADD(tx_expand_skb_head_cloned,
 457                 local->tx_expand_skb_head_cloned);
 458         DEBUGFS_STATS_ADD(rx_expand_skb_head,
 459                 local->rx_expand_skb_head);
 460         DEBUGFS_STATS_ADD(rx_expand_skb_head2,
 461                 local->rx_expand_skb_head2);
 462         DEBUGFS_STATS_ADD(rx_handlers_fragments,
 463                 local->rx_handlers_fragments);
 464         DEBUGFS_STATS_ADD(tx_status_drop,
 465                 local->tx_status_drop);
 466 #endif
 467         DEBUGFS_DEVSTATS_ADD(dot11ACKFailureCount);
 468         DEBUGFS_DEVSTATS_ADD(dot11RTSFailureCount);
 469         DEBUGFS_DEVSTATS_ADD(dot11FCSErrorCount);
 470         DEBUGFS_DEVSTATS_ADD(dot11RTSSuccessCount);
 471 }