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