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                         wiphy_info(local->hw.wiphy, "debugfs reset TSF\n");
  90                 }
  91         } else {
  92                 tsf = simple_strtoul(buf, NULL, 0);
  93                 if (local->ops->set_tsf) {
  94                         drv_set_tsf(local, tsf);
  95                         wiphy_info(local->hw.wiphy,
  96                                    "debugfs set TSF to %#018llx\n", tsf);
  97
  98                 }
  99         }
 100
 101         return count;
 102 }
 103
 104 static const struct file_operations tsf_ops = {
 105         .read = tsf_read,
 106         .write = tsf_write,
 107         .open = mac80211_open_file_generic,
 108         .llseek = default_llseek,
 109 };
 110
 111 static ssize_t reset_write(struct file *file, const char __user *user_buf,
 112                            size_t count, loff_t *ppos)
 113 {
 114         struct ieee80211_local *local = file->private_data;
 115
 116         rtnl_lock();
 117         __ieee80211_suspend(&local->hw);
 118         __ieee80211_resume(&local->hw);
 119         rtnl_unlock();
 120
 121         return count;
 122 }
 123
 124 static const struct file_operations reset_ops = {
 125         .write = reset_write,
 126         .open = mac80211_open_file_generic,
 127         .llseek = noop_llseek,
 128 };
 129
 130 static ssize_t noack_read(struct file *file, char __user *user_buf,
 131                           size_t count, loff_t *ppos)
 132 {
 133         struct ieee80211_local *local = file->private_data;
 134         int res;
 135         char buf[10];
 136
 137         res = scnprintf(buf, sizeof(buf), "%d\n", local->wifi_wme_noack_test);
 138
 139         return simple_read_from_buffer(user_buf, count, ppos, buf, res);
 140 }
 141
 142 static ssize_t noack_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         char buf[10];
 148         size_t len;
 149
 150         len = min(count, sizeof(buf) - 1);
 151         if (copy_from_user(buf, user_buf, len))
 152                 return -EFAULT;
 153         buf[len] = '\0';
 154
 155         local->wifi_wme_noack_test = !!simple_strtoul(buf, NULL, 0);
 156
 157         return count;
 158 }
 159
 160 static const struct file_operations noack_ops = {
 161         .read = noack_read,
 162         .write = noack_write,
 163         .open = mac80211_open_file_generic,
 164         .llseek = default_llseek,
 165 };
 166
 167 static ssize_t uapsd_queues_read(struct file *file, char __user *user_buf,
 168                                  size_t count, loff_t *ppos)
 169 {
 170         struct ieee80211_local *local = file->private_data;
 171         int res;
 172         char buf[10];
 173
 174         res = scnprintf(buf, sizeof(buf), "0x%x\n", local->uapsd_queues);
 175
 176         return simple_read_from_buffer(user_buf, count, ppos, buf, res);
 177 }
 178
 179 static ssize_t uapsd_queues_write(struct file *file,
 180                                   const char __user *user_buf,
 181                                   size_t count, loff_t *ppos)
 182 {
 183         struct ieee80211_local *local = file->private_data;
 184         unsigned long val;
 185         char buf[10];
 186         size_t len;
 187         int ret;
 188
 189         len = min(count, sizeof(buf) - 1);
 190         if (copy_from_user(buf, user_buf, len))
 191                 return -EFAULT;
 192         buf[len] = '\0';
 193
 194         ret = strict_strtoul(buf, 0, &val);
 195
 196         if (ret)
 197                 return -EINVAL;
 198
 199         if (val & ~IEEE80211_WMM_IE_STA_QOSINFO_AC_MASK)
 200                 return -ERANGE;
 201
 202         local->uapsd_queues = val;
 203
 204         return count;
 205 }
 206
 207 static const struct file_operations uapsd_queues_ops = {
 208         .read = uapsd_queues_read,
 209         .write = uapsd_queues_write,
 210         .open = mac80211_open_file_generic,
 211         .llseek = default_llseek,
 212 };
 213
 214 static ssize_t uapsd_max_sp_len_read(struct file *file, char __user *user_buf,
 215                                      size_t count, loff_t *ppos)
 216 {
 217         struct ieee80211_local *local = file->private_data;
 218         int res;
 219         char buf[10];
 220
 221         res = scnprintf(buf, sizeof(buf), "0x%x\n", local->uapsd_max_sp_len);
 222
 223         return simple_read_from_buffer(user_buf, count, ppos, buf, res);
 224 }
 225
 226 static ssize_t uapsd_max_sp_len_write(struct file *file,
 227                                       const char __user *user_buf,
 228                                       size_t count, loff_t *ppos)
 229 {
 230         struct ieee80211_local *local = file->private_data;
 231         unsigned long val;
 232         char buf[10];
 233         size_t len;
 234         int ret;
 235
 236         len = min(count, sizeof(buf) - 1);
 237         if (copy_from_user(buf, user_buf, len))
 238                 return -EFAULT;
 239         buf[len] = '\0';
 240
 241         ret = strict_strtoul(buf, 0, &val);
 242
 243         if (ret)
 244                 return -EINVAL;
 245
 246         if (val & ~IEEE80211_WMM_IE_STA_QOSINFO_SP_MASK)
 247                 return -ERANGE;
 248
 249         local->uapsd_max_sp_len = val;
 250
 251         return count;
 252 }
 253
 254 static const struct file_operations uapsd_max_sp_len_ops = {
 255         .read = uapsd_max_sp_len_read,
 256         .write = uapsd_max_sp_len_write,
 257         .open = mac80211_open_file_generic,
 258         .llseek = default_llseek,
 259 };
 260
 261 static ssize_t channel_type_read(struct file *file, char __user *user_buf,
 262                        size_t count, loff_t *ppos)
 263 {
 264         struct ieee80211_local *local = file->private_data;
 265         const char *buf;
 266
 267         switch (local->hw.conf.channel_type) {
 268         case NL80211_CHAN_NO_HT:
 269                 buf = "no ht\n";
 270                 break;
 271         case NL80211_CHAN_HT20:
 272                 buf = "ht20\n";
 273                 break;
 274         case NL80211_CHAN_HT40MINUS:
 275                 buf = "ht40-\n";
 276                 break;
 277         case NL80211_CHAN_HT40PLUS:
 278                 buf = "ht40+\n";
 279                 break;
 280         default:
 281                 buf = "???";
 282                 break;
 283         }
 284
 285         return simple_read_from_buffer(user_buf, count, ppos, buf, strlen(buf));
 286 }
 287
 288 static const struct file_operations channel_type_ops = {
 289         .read = channel_type_read,
 290         .open = mac80211_open_file_generic,
 291         .llseek = default_llseek,
 292 };
 293
 294 static ssize_t queues_read(struct file *file, char __user *user_buf,
 295                            size_t count, loff_t *ppos)
 296 {
 297         struct ieee80211_local *local = file->private_data;
 298         unsigned long flags;
 299         char buf[IEEE80211_MAX_QUEUES * 20];
 300         int q, res = 0;
 301
 302         spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
 303         for (q = 0; q < local->hw.queues; q++)
 304                 res += sprintf(buf + res, "%02d: %#.8lx/%d\n", q,
 305                                 local->queue_stop_reasons[q],
 306                                 skb_queue_len(&local->pending[q]));
 307         spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
 308
 309         return simple_read_from_buffer(user_buf, count, ppos, buf, res);
 310 }
 311
 312 static const struct file_operations queues_ops = {
 313         .read = queues_read,
 314         .open = mac80211_open_file_generic,
 315         .llseek = default_llseek,
 316 };
 317
 318 /* statistics stuff */
 319
 320 static ssize_t format_devstat_counter(struct ieee80211_local *local,
 321         char __user *userbuf,
 322         size_t count, loff_t *ppos,
 323         int (*printvalue)(struct ieee80211_low_level_stats *stats, char *buf,
 324                           int buflen))
 325 {
 326         struct ieee80211_low_level_stats stats;
 327         char buf[20];
 328         int res;
 329
 330         rtnl_lock();
 331         res = drv_get_stats(local, &stats);
 332         rtnl_unlock();
 333         if (res)
 334                 return res;
 335         res = printvalue(&stats, buf, sizeof(buf));
 336         return simple_read_from_buffer(userbuf, count, ppos, buf, res);
 337 }
 338
 339 #define DEBUGFS_DEVSTATS_FILE(name)                                     \
 340 static int print_devstats_##name(struct ieee80211_low_level_stats *stats,\
 341                                  char *buf, int buflen)                 \
 342 {                                                                       \
 343         return scnprintf(buf, buflen, "%u\n", stats->name);             \
 344 }                                                                       \
 345 static ssize_t stats_ ##name## _read(struct file *file,                 \
 346                                      char __user *userbuf,              \
 347                                      size_t count, loff_t *ppos)        \
 348 {                                                                       \
 349         return format_devstat_counter(file->private_data,               \
 350                                       userbuf,                          \
 351                                       count,                            \
 352                                       ppos,                             \
 353                                       print_devstats_##name);           \
 354 }                                                                       \
 355                                                                         \
 356 static const struct file_operations stats_ ##name## _ops = {            \
 357         .read = stats_ ##name## _read,                                  \
 358         .open = mac80211_open_file_generic,                             \
 359         .llseek = generic_file_llseek,                                  \
 360 };
 361
 362 #define DEBUGFS_STATS_ADD(name, field)                                  \
 363         debugfs_create_u32(#name, 0400, statsd, (u32 *) &field);
 364 #define DEBUGFS_DEVSTATS_ADD(name)                                      \
 365         debugfs_create_file(#name, 0400, statsd, local, &stats_ ##name## _ops);
 366
 367 DEBUGFS_DEVSTATS_FILE(dot11ACKFailureCount);
 368 DEBUGFS_DEVSTATS_FILE(dot11RTSFailureCount);
 369 DEBUGFS_DEVSTATS_FILE(dot11FCSErrorCount);
 370 DEBUGFS_DEVSTATS_FILE(dot11RTSSuccessCount);
 371
 372 void debugfs_hw_add(struct ieee80211_local *local)
 373 {
 374         struct dentry *phyd = local->hw.wiphy->debugfsdir;
 375         struct dentry *statsd;
 376
 377         if (!phyd)
 378                 return;
 379
 380         local->debugfs.keys = debugfs_create_dir("keys", phyd);
 381
 382         DEBUGFS_ADD(frequency);
 383         DEBUGFS_ADD(total_ps_buffered);
 384         DEBUGFS_ADD(wep_iv);
 385         DEBUGFS_ADD(tsf);
 386         DEBUGFS_ADD(queues);
 387         DEBUGFS_ADD_MODE(reset, 0200);
 388         DEBUGFS_ADD(noack);
 389         DEBUGFS_ADD(uapsd_queues);
 390         DEBUGFS_ADD(uapsd_max_sp_len);
 391         DEBUGFS_ADD(channel_type);
 392
 393         statsd = debugfs_create_dir("statistics", phyd);
 394
 395         /* if the dir failed, don't put all the other things into the root! */
 396         if (!statsd)
 397                 return;
 398
 399         DEBUGFS_STATS_ADD(transmitted_fragment_count,
 400                 local->dot11TransmittedFragmentCount);
 401         DEBUGFS_STATS_ADD(multicast_transmitted_frame_count,
 402                 local->dot11MulticastTransmittedFrameCount);
 403         DEBUGFS_STATS_ADD(failed_count, local->dot11FailedCount);
 404         DEBUGFS_STATS_ADD(retry_count, local->dot11RetryCount);
 405         DEBUGFS_STATS_ADD(multiple_retry_count,
 406                 local->dot11MultipleRetryCount);
 407         DEBUGFS_STATS_ADD(frame_duplicate_count,
 408                 local->dot11FrameDuplicateCount);
 409         DEBUGFS_STATS_ADD(received_fragment_count,
 410                 local->dot11ReceivedFragmentCount);
 411         DEBUGFS_STATS_ADD(multicast_received_frame_count,
 412                 local->dot11MulticastReceivedFrameCount);
 413         DEBUGFS_STATS_ADD(transmitted_frame_count,
 414                 local->dot11TransmittedFrameCount);
 415 #ifdef CONFIG_MAC80211_DEBUG_COUNTERS
 416         DEBUGFS_STATS_ADD(tx_handlers_drop, local->tx_handlers_drop);
 417         DEBUGFS_STATS_ADD(tx_handlers_queued, local->tx_handlers_queued);
 418         DEBUGFS_STATS_ADD(tx_handlers_drop_unencrypted,
 419                 local->tx_handlers_drop_unencrypted);
 420         DEBUGFS_STATS_ADD(tx_handlers_drop_fragment,
 421                 local->tx_handlers_drop_fragment);
 422         DEBUGFS_STATS_ADD(tx_handlers_drop_wep,
 423                 local->tx_handlers_drop_wep);
 424         DEBUGFS_STATS_ADD(tx_handlers_drop_not_assoc,
 425                 local->tx_handlers_drop_not_assoc);
 426         DEBUGFS_STATS_ADD(tx_handlers_drop_unauth_port,
 427                 local->tx_handlers_drop_unauth_port);
 428         DEBUGFS_STATS_ADD(rx_handlers_drop, local->rx_handlers_drop);
 429         DEBUGFS_STATS_ADD(rx_handlers_queued, local->rx_handlers_queued);
 430         DEBUGFS_STATS_ADD(rx_handlers_drop_nullfunc,
 431                 local->rx_handlers_drop_nullfunc);
 432         DEBUGFS_STATS_ADD(rx_handlers_drop_defrag,
 433                 local->rx_handlers_drop_defrag);
 434         DEBUGFS_STATS_ADD(rx_handlers_drop_short,
 435                 local->rx_handlers_drop_short);
 436         DEBUGFS_STATS_ADD(rx_handlers_drop_passive_scan,
 437                 local->rx_handlers_drop_passive_scan);
 438         DEBUGFS_STATS_ADD(tx_expand_skb_head,
 439                 local->tx_expand_skb_head);
 440         DEBUGFS_STATS_ADD(tx_expand_skb_head_cloned,
 441                 local->tx_expand_skb_head_cloned);
 442         DEBUGFS_STATS_ADD(rx_expand_skb_head,
 443                 local->rx_expand_skb_head);
 444         DEBUGFS_STATS_ADD(rx_expand_skb_head2,
 445                 local->rx_expand_skb_head2);
 446         DEBUGFS_STATS_ADD(rx_handlers_fragments,
 447                 local->rx_handlers_fragments);
 448         DEBUGFS_STATS_ADD(tx_status_drop,
 449                 local->tx_status_drop);
 450 #endif
 451         DEBUGFS_DEVSTATS_ADD(dot11ACKFailureCount);
 452         DEBUGFS_DEVSTATS_ADD(dot11RTSFailureCount);
 453         DEBUGFS_DEVSTATS_ADD(dot11FCSErrorCount);
 454         DEBUGFS_DEVSTATS_ADD(dot11RTSSuccessCount);
 455 }