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(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 static const struct file_operations name## _ops = {                     \
  51         .read = name## _read,                                           \
  52         .open = mac80211_open_file_generic,                             \
  53         .llseek = generic_file_llseek,                                  \
  54 };
  55
  56 #define DEBUGFS_ADD(name)                                               \
  57         debugfs_create_file(#name, 0400, phyd, local, &name## _ops);
  58
  59 #define DEBUGFS_ADD_MODE(name, mode)                                    \
  60         debugfs_create_file(#name, mode, phyd, local, &name## _ops);
  61
  62
  63 DEBUGFS_READONLY_FILE(frequency, "%d",
  64                       local->hw.conf.channel->center_freq);
  65 DEBUGFS_READONLY_FILE(total_ps_buffered, "%d",
  66                       local->total_ps_buffered);
  67 DEBUGFS_READONLY_FILE(wep_iv, "%#08x",
  68                       local->wep_iv & 0xffffff);
  69 DEBUGFS_READONLY_FILE(rate_ctrl_alg, "%s",
  70         local->rate_ctrl ? local->rate_ctrl->ops->name : "hw/driver");
  71
  72 static ssize_t tsf_read(struct file *file, char __user *user_buf,
  73                              size_t count, loff_t *ppos)
  74 {
  75         struct ieee80211_local *local = file->private_data;
  76         u64 tsf;
  77
  78         tsf = drv_get_tsf(local);
  79
  80         return mac80211_format_buffer(user_buf, count, ppos, "0x%016llx\n",
  81                                       (unsigned long long) tsf);
  82 }
  83
  84 static ssize_t tsf_write(struct file *file,
  85                          const char __user *user_buf,
  86                          size_t count, loff_t *ppos)
  87 {
  88         struct ieee80211_local *local = file->private_data;
  89         unsigned long long tsf;
  90         char buf[100];
  91         size_t len;
  92
  93         len = min(count, sizeof(buf) - 1);
  94         if (copy_from_user(buf, user_buf, len))
  95                 return -EFAULT;
  96         buf[len] = '\0';
  97
  98         if (strncmp(buf, "reset", 5) == 0) {
  99                 if (local->ops->reset_tsf) {
 100                         drv_reset_tsf(local);
 101                         wiphy_info(local->hw.wiphy, "debugfs reset TSF\n");
 102                 }
 103         } else {
 104                 tsf = simple_strtoul(buf, NULL, 0);
 105                 if (local->ops->set_tsf) {
 106                         drv_set_tsf(local, tsf);
 107                         wiphy_info(local->hw.wiphy,
 108                                    "debugfs set TSF to %#018llx\n", tsf);
 109
 110                 }
 111         }
 112
 113         return count;
 114 }
 115
 116 static const struct file_operations tsf_ops = {
 117         .read = tsf_read,
 118         .write = tsf_write,
 119         .open = mac80211_open_file_generic,
 120         .llseek = default_llseek,
 121 };
 122
 123 static ssize_t reset_write(struct file *file, const char __user *user_buf,
 124                            size_t count, loff_t *ppos)
 125 {
 126         struct ieee80211_local *local = file->private_data;
 127
 128         rtnl_lock();
 129         __ieee80211_suspend(&local->hw);
 130         __ieee80211_resume(&local->hw);
 131         rtnl_unlock();
 132
 133         return count;
 134 }
 135
 136 static const struct file_operations reset_ops = {
 137         .write = reset_write,
 138         .open = mac80211_open_file_generic,
 139         .llseek = noop_llseek,
 140 };
 141
 142 static ssize_t noack_read(struct file *file, char __user *user_buf,
 143                           size_t count, loff_t *ppos)
 144 {
 145         struct ieee80211_local *local = file->private_data;
 146
 147         return mac80211_format_buffer(user_buf, count, ppos, "%d\n",
 148                                       local->wifi_wme_noack_test);
 149 }
 150
 151 static ssize_t noack_write(struct file *file,
 152                            const char __user *user_buf,
 153                            size_t count, loff_t *ppos)
 154 {
 155         struct ieee80211_local *local = file->private_data;
 156         char buf[10];
 157         size_t len;
 158
 159         len = min(count, sizeof(buf) - 1);
 160         if (copy_from_user(buf, user_buf, len))
 161                 return -EFAULT;
 162         buf[len] = '\0';
 163
 164         local->wifi_wme_noack_test = !!simple_strtoul(buf, NULL, 0);
 165
 166         return count;
 167 }
 168
 169 static const struct file_operations noack_ops = {
 170         .read = noack_read,
 171         .write = noack_write,
 172         .open = mac80211_open_file_generic,
 173         .llseek = default_llseek,
 174 };
 175
 176 static ssize_t uapsd_queues_read(struct file *file, char __user *user_buf,
 177                                  size_t count, loff_t *ppos)
 178 {
 179         struct ieee80211_local *local = file->private_data;
 180         return mac80211_format_buffer(user_buf, count, ppos, "0x%x\n",
 181                                       local->uapsd_queues);
 182 }
 183
 184 static ssize_t uapsd_queues_write(struct file *file,
 185                                   const char __user *user_buf,
 186                                   size_t count, loff_t *ppos)
 187 {
 188         struct ieee80211_local *local = file->private_data;
 189         unsigned long val;
 190         char buf[10];
 191         size_t len;
 192         int ret;
 193
 194         len = min(count, sizeof(buf) - 1);
 195         if (copy_from_user(buf, user_buf, len))
 196                 return -EFAULT;
 197         buf[len] = '\0';
 198
 199         ret = strict_strtoul(buf, 0, &val);
 200
 201         if (ret)
 202                 return -EINVAL;
 203
 204         if (val & ~IEEE80211_WMM_IE_STA_QOSINFO_AC_MASK)
 205                 return -ERANGE;
 206
 207         local->uapsd_queues = val;
 208
 209         return count;
 210 }
 211
 212 static const struct file_operations uapsd_queues_ops = {
 213         .read = uapsd_queues_read,
 214         .write = uapsd_queues_write,
 215         .open = mac80211_open_file_generic,
 216         .llseek = default_llseek,
 217 };
 218
 219 static ssize_t uapsd_max_sp_len_read(struct file *file, char __user *user_buf,
 220                                      size_t count, loff_t *ppos)
 221 {
 222         struct ieee80211_local *local = file->private_data;
 223
 224         return mac80211_format_buffer(user_buf, count, ppos, "0x%x\n",
 225                                       local->uapsd_max_sp_len);
 226 }
 227
 228 static ssize_t uapsd_max_sp_len_write(struct file *file,
 229                                       const char __user *user_buf,
 230                                       size_t count, loff_t *ppos)
 231 {
 232         struct ieee80211_local *local = file->private_data;
 233         unsigned long val;
 234         char buf[10];
 235         size_t len;
 236         int ret;
 237
 238         len = min(count, sizeof(buf) - 1);
 239         if (copy_from_user(buf, user_buf, len))
 240                 return -EFAULT;
 241         buf[len] = '\0';
 242
 243         ret = strict_strtoul(buf, 0, &val);
 244
 245         if (ret)
 246                 return -EINVAL;
 247
 248         if (val & ~IEEE80211_WMM_IE_STA_QOSINFO_SP_MASK)
 249                 return -ERANGE;
 250
 251         local->uapsd_max_sp_len = val;
 252
 253         return count;
 254 }
 255
 256 static const struct file_operations uapsd_max_sp_len_ops = {
 257         .read = uapsd_max_sp_len_read,
 258         .write = uapsd_max_sp_len_write,
 259         .open = mac80211_open_file_generic,
 260         .llseek = default_llseek,
 261 };
 262
 263 static ssize_t channel_type_read(struct file *file, char __user *user_buf,
 264                        size_t count, loff_t *ppos)
 265 {
 266         struct ieee80211_local *local = file->private_data;
 267         const char *buf;
 268
 269         switch (local->hw.conf.channel_type) {
 270         case NL80211_CHAN_NO_HT:
 271                 buf = "no ht\n";
 272                 break;
 273         case NL80211_CHAN_HT20:
 274                 buf = "ht20\n";
 275                 break;
 276         case NL80211_CHAN_HT40MINUS:
 277                 buf = "ht40-\n";
 278                 break;
 279         case NL80211_CHAN_HT40PLUS:
 280                 buf = "ht40+\n";
 281                 break;
 282         default:
 283                 buf = "???";
 284                 break;
 285         }
 286
 287         return simple_read_from_buffer(user_buf, count, ppos, buf, strlen(buf));
 288 }
 289
 290 static const struct file_operations channel_type_ops = {
 291         .read = channel_type_read,
 292         .open = mac80211_open_file_generic,
 293         .llseek = default_llseek,
 294 };
 295
 296 static ssize_t queues_read(struct file *file, char __user *user_buf,
 297                            size_t count, loff_t *ppos)
 298 {
 299         struct ieee80211_local *local = file->private_data;
 300         unsigned long flags;
 301         char buf[IEEE80211_MAX_QUEUES * 20];
 302         int q, res = 0;
 303
 304         spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
 305         for (q = 0; q < local->hw.queues; q++)
 306                 res += sprintf(buf + res, "%02d: %#.8lx/%d\n", q,
 307                                 local->queue_stop_reasons[q],
 308                                 skb_queue_len(&local->pending[q]));
 309         spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
 310
 311         return simple_read_from_buffer(user_buf, count, ppos, buf, res);
 312 }
 313
 314 static const struct file_operations queues_ops = {
 315         .read = queues_read,
 316         .open = mac80211_open_file_generic,
 317         .llseek = default_llseek,
 318 };
 319
 320 /* statistics stuff */
 321
 322 static ssize_t format_devstat_counter(struct ieee80211_local *local,
 323         char __user *userbuf,
 324         size_t count, loff_t *ppos,
 325         int (*printvalue)(struct ieee80211_low_level_stats *stats, char *buf,
 326                           int buflen))
 327 {
 328         struct ieee80211_low_level_stats stats;
 329         char buf[20];
 330         int res;
 331
 332         rtnl_lock();
 333         res = drv_get_stats(local, &stats);
 334         rtnl_unlock();
 335         if (res)
 336                 return res;
 337         res = printvalue(&stats, buf, sizeof(buf));
 338         return simple_read_from_buffer(userbuf, count, ppos, buf, res);
 339 }
 340
 341 #define DEBUGFS_DEVSTATS_FILE(name)                                     \
 342 static int print_devstats_##name(struct ieee80211_low_level_stats *stats,\
 343                                  char *buf, int buflen)                 \
 344 {                                                                       \
 345         return scnprintf(buf, buflen, "%u\n", stats->name);             \
 346 }                                                                       \
 347 static ssize_t stats_ ##name## _read(struct file *file,                 \
 348                                      char __user *userbuf,              \
 349                                      size_t count, loff_t *ppos)        \
 350 {                                                                       \
 351         return format_devstat_counter(file->private_data,               \
 352                                       userbuf,                          \
 353                                       count,                            \
 354                                       ppos,                             \
 355                                       print_devstats_##name);           \
 356 }                                                                       \
 357                                                                         \
 358 static const struct file_operations stats_ ##name## _ops = {            \
 359         .read = stats_ ##name## _read,                                  \
 360         .open = mac80211_open_file_generic,                             \
 361         .llseek = generic_file_llseek,                                  \
 362 };
 363
 364 #define DEBUGFS_STATS_ADD(name, field)                                  \
 365         debugfs_create_u32(#name, 0400, statsd, (u32 *) &field);
 366 #define DEBUGFS_DEVSTATS_ADD(name)                                      \
 367         debugfs_create_file(#name, 0400, statsd, local, &stats_ ##name## _ops);
 368
 369 DEBUGFS_DEVSTATS_FILE(dot11ACKFailureCount);
 370 DEBUGFS_DEVSTATS_FILE(dot11RTSFailureCount);
 371 DEBUGFS_DEVSTATS_FILE(dot11FCSErrorCount);
 372 DEBUGFS_DEVSTATS_FILE(dot11RTSSuccessCount);
 373
 374 void debugfs_hw_add(struct ieee80211_local *local)
 375 {
 376         struct dentry *phyd = local->hw.wiphy->debugfsdir;
 377         struct dentry *statsd;
 378
 379         if (!phyd)
 380                 return;
 381
 382         local->debugfs.keys = debugfs_create_dir("keys", phyd);
 383
 384         DEBUGFS_ADD(frequency);
 385         DEBUGFS_ADD(total_ps_buffered);
 386         DEBUGFS_ADD(wep_iv);
 387         DEBUGFS_ADD(tsf);
 388         DEBUGFS_ADD(queues);
 389         DEBUGFS_ADD_MODE(reset, 0200);
 390         DEBUGFS_ADD(noack);
 391         DEBUGFS_ADD(uapsd_queues);
 392         DEBUGFS_ADD(uapsd_max_sp_len);
 393         DEBUGFS_ADD(channel_type);
 394
 395         statsd = debugfs_create_dir("statistics", phyd);
 396
 397         /* if the dir failed, don't put all the other things into the root! */
 398         if (!statsd)
 399                 return;
 400
 401         DEBUGFS_STATS_ADD(transmitted_fragment_count,
 402                 local->dot11TransmittedFragmentCount);
 403         DEBUGFS_STATS_ADD(multicast_transmitted_frame_count,
 404                 local->dot11MulticastTransmittedFrameCount);
 405         DEBUGFS_STATS_ADD(failed_count, local->dot11FailedCount);
 406         DEBUGFS_STATS_ADD(retry_count, local->dot11RetryCount);
 407         DEBUGFS_STATS_ADD(multiple_retry_count,
 408                 local->dot11MultipleRetryCount);
 409         DEBUGFS_STATS_ADD(frame_duplicate_count,
 410                 local->dot11FrameDuplicateCount);
 411         DEBUGFS_STATS_ADD(received_fragment_count,
 412                 local->dot11ReceivedFragmentCount);
 413         DEBUGFS_STATS_ADD(multicast_received_frame_count,
 414                 local->dot11MulticastReceivedFrameCount);
 415         DEBUGFS_STATS_ADD(transmitted_frame_count,
 416                 local->dot11TransmittedFrameCount);
 417 #ifdef CONFIG_MAC80211_DEBUG_COUNTERS
 418         DEBUGFS_STATS_ADD(tx_handlers_drop, local->tx_handlers_drop);
 419         DEBUGFS_STATS_ADD(tx_handlers_queued, local->tx_handlers_queued);
 420         DEBUGFS_STATS_ADD(tx_handlers_drop_unencrypted,
 421                 local->tx_handlers_drop_unencrypted);
 422         DEBUGFS_STATS_ADD(tx_handlers_drop_fragment,
 423                 local->tx_handlers_drop_fragment);
 424         DEBUGFS_STATS_ADD(tx_handlers_drop_wep,
 425                 local->tx_handlers_drop_wep);
 426         DEBUGFS_STATS_ADD(tx_handlers_drop_not_assoc,
 427                 local->tx_handlers_drop_not_assoc);
 428         DEBUGFS_STATS_ADD(tx_handlers_drop_unauth_port,
 429                 local->tx_handlers_drop_unauth_port);
 430         DEBUGFS_STATS_ADD(rx_handlers_drop, local->rx_handlers_drop);
 431         DEBUGFS_STATS_ADD(rx_handlers_queued, local->rx_handlers_queued);
 432         DEBUGFS_STATS_ADD(rx_handlers_drop_nullfunc,
 433                 local->rx_handlers_drop_nullfunc);
 434         DEBUGFS_STATS_ADD(rx_handlers_drop_defrag,
 435                 local->rx_handlers_drop_defrag);
 436         DEBUGFS_STATS_ADD(rx_handlers_drop_short,
 437                 local->rx_handlers_drop_short);
 438         DEBUGFS_STATS_ADD(rx_handlers_drop_passive_scan,
 439                 local->rx_handlers_drop_passive_scan);
 440         DEBUGFS_STATS_ADD(tx_expand_skb_head,
 441                 local->tx_expand_skb_head);
 442         DEBUGFS_STATS_ADD(tx_expand_skb_head_cloned,
 443                 local->tx_expand_skb_head_cloned);
 444         DEBUGFS_STATS_ADD(rx_expand_skb_head,
 445                 local->rx_expand_skb_head);
 446         DEBUGFS_STATS_ADD(rx_expand_skb_head2,
 447                 local->rx_expand_skb_head2);
 448         DEBUGFS_STATS_ADD(rx_handlers_fragments,
 449                 local->rx_handlers_fragments);
 450         DEBUGFS_STATS_ADD(tx_status_drop,
 451                 local->tx_status_drop);
 452 #endif
 453         DEBUGFS_DEVSTATS_ADD(dot11ACKFailureCount);
 454         DEBUGFS_DEVSTATS_ADD(dot11RTSFailureCount);
 455         DEBUGFS_DEVSTATS_ADD(dot11FCSErrorCount);
 456         DEBUGFS_DEVSTATS_ADD(dot11RTSSuccessCount);
 457 }