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 };
  40
  41 #define DEBUGFS_ADD(name)                                               \
  42         debugfs_create_file(#name, 0400, phyd, local, &name## _ops);
  43
  44 #define DEBUGFS_ADD_MODE(name, mode)                                    \
  45         debugfs_create_file(#name, mode, phyd, local, &name## _ops);
  46
  47
  48 DEBUGFS_READONLY_FILE(frequency, 20, "%d",
  49                       local->hw.conf.channel->center_freq);
  50 DEBUGFS_READONLY_FILE(total_ps_buffered, 20, "%d",
  51                       local->total_ps_buffered);
  52 DEBUGFS_READONLY_FILE(wep_iv, 20, "%#08x",
  53                       local->wep_iv & 0xffffff);
  54 DEBUGFS_READONLY_FILE(rate_ctrl_alg, 100, "%s",
  55         local->rate_ctrl ? local->rate_ctrl->ops->name : "hw/driver");
  56
  57 static ssize_t tsf_read(struct file *file, char __user *user_buf,
  58                              size_t count, loff_t *ppos)
  59 {
  60         struct ieee80211_local *local = file->private_data;
  61         u64 tsf;
  62         char buf[100];
  63
  64         tsf = drv_get_tsf(local);
  65
  66         snprintf(buf, sizeof(buf), "0x%016llx\n", (unsigned long long) tsf);
  67
  68         return simple_read_from_buffer(user_buf, count, ppos, buf, 19);
  69 }
  70
  71 static ssize_t tsf_write(struct file *file,
  72                          const char __user *user_buf,
  73                          size_t count, loff_t *ppos)
  74 {
  75         struct ieee80211_local *local = file->private_data;
  76         unsigned long long tsf;
  77         char buf[100];
  78         size_t len;
  79
  80         len = min(count, sizeof(buf) - 1);
  81         if (copy_from_user(buf, user_buf, len))
  82                 return -EFAULT;
  83         buf[len] = '\0';
  84
  85         if (strncmp(buf, "reset", 5) == 0) {
  86                 if (local->ops->reset_tsf) {
  87                         drv_reset_tsf(local);
  88                         wiphy_info(local->hw.wiphy, "debugfs reset TSF\n");
  89                 }
  90         } else {
  91                 tsf = simple_strtoul(buf, NULL, 0);
  92                 if (local->ops->set_tsf) {
  93                         drv_set_tsf(local, tsf);
  94                         wiphy_info(local->hw.wiphy,
  95                                    "debugfs set TSF to %#018llx\n", tsf);
  96
  97                 }
  98         }
  99
 100         return count;
 101 }
 102
 103 static const struct file_operations tsf_ops = {
 104         .read = tsf_read,
 105         .write = tsf_write,
 106         .open = mac80211_open_file_generic
 107 };
 108
 109 static ssize_t reset_write(struct file *file, const char __user *user_buf,
 110                            size_t count, loff_t *ppos)
 111 {
 112         struct ieee80211_local *local = file->private_data;
 113
 114         rtnl_lock();
 115         __ieee80211_suspend(&local->hw);
 116         __ieee80211_resume(&local->hw);
 117         rtnl_unlock();
 118
 119         return count;
 120 }
 121
 122 static const struct file_operations reset_ops = {
 123         .write = reset_write,
 124         .open = mac80211_open_file_generic,
 125 };
 126
 127 static ssize_t noack_read(struct file *file, char __user *user_buf,
 128                           size_t count, loff_t *ppos)
 129 {
 130         struct ieee80211_local *local = file->private_data;
 131         int res;
 132         char buf[10];
 133
 134         res = scnprintf(buf, sizeof(buf), "%d\n", local->wifi_wme_noack_test);
 135
 136         return simple_read_from_buffer(user_buf, count, ppos, buf, res);
 137 }
 138
 139 static ssize_t noack_write(struct file *file,
 140                            const char __user *user_buf,
 141                            size_t count, loff_t *ppos)
 142 {
 143         struct ieee80211_local *local = file->private_data;
 144         char buf[10];
 145         size_t len;
 146
 147         len = min(count, sizeof(buf) - 1);
 148         if (copy_from_user(buf, user_buf, len))
 149                 return -EFAULT;
 150         buf[len] = '\0';
 151
 152         local->wifi_wme_noack_test = !!simple_strtoul(buf, NULL, 0);
 153
 154         return count;
 155 }
 156
 157 static const struct file_operations noack_ops = {
 158         .read = noack_read,
 159         .write = noack_write,
 160         .open = mac80211_open_file_generic
 161 };
 162
 163 static ssize_t uapsd_queues_read(struct file *file, char __user *user_buf,
 164                                  size_t count, loff_t *ppos)
 165 {
 166         struct ieee80211_local *local = file->private_data;
 167         int res;
 168         char buf[10];
 169
 170         res = scnprintf(buf, sizeof(buf), "0x%x\n", local->uapsd_queues);
 171
 172         return simple_read_from_buffer(user_buf, count, ppos, buf, res);
 173 }
 174
 175 static ssize_t uapsd_queues_write(struct file *file,
 176                                   const char __user *user_buf,
 177                                   size_t count, loff_t *ppos)
 178 {
 179         struct ieee80211_local *local = file->private_data;
 180         unsigned long val;
 181         char buf[10];
 182         size_t len;
 183         int ret;
 184
 185         len = min(count, sizeof(buf) - 1);
 186         if (copy_from_user(buf, user_buf, len))
 187                 return -EFAULT;
 188         buf[len] = '\0';
 189
 190         ret = strict_strtoul(buf, 0, &val);
 191
 192         if (ret)
 193                 return -EINVAL;
 194
 195         if (val & ~IEEE80211_WMM_IE_STA_QOSINFO_AC_MASK)
 196                 return -ERANGE;
 197
 198         local->uapsd_queues = val;
 199
 200         return count;
 201 }
 202
 203 static const struct file_operations uapsd_queues_ops = {
 204         .read = uapsd_queues_read,
 205         .write = uapsd_queues_write,
 206         .open = mac80211_open_file_generic
 207 };
 208
 209 static ssize_t uapsd_max_sp_len_read(struct file *file, char __user *user_buf,
 210                                      size_t count, loff_t *ppos)
 211 {
 212         struct ieee80211_local *local = file->private_data;
 213         int res;
 214         char buf[10];
 215
 216         res = scnprintf(buf, sizeof(buf), "0x%x\n", local->uapsd_max_sp_len);
 217
 218         return simple_read_from_buffer(user_buf, count, ppos, buf, res);
 219 }
 220
 221 static ssize_t uapsd_max_sp_len_write(struct file *file,
 222                                       const char __user *user_buf,
 223                                       size_t count, loff_t *ppos)
 224 {
 225         struct ieee80211_local *local = file->private_data;
 226         unsigned long val;
 227         char buf[10];
 228         size_t len;
 229         int ret;
 230
 231         len = min(count, sizeof(buf) - 1);
 232         if (copy_from_user(buf, user_buf, len))
 233                 return -EFAULT;
 234         buf[len] = '\0';
 235
 236         ret = strict_strtoul(buf, 0, &val);
 237
 238         if (ret)
 239                 return -EINVAL;
 240
 241         if (val & ~IEEE80211_WMM_IE_STA_QOSINFO_SP_MASK)
 242                 return -ERANGE;
 243
 244         local->uapsd_max_sp_len = val;
 245
 246         return count;
 247 }
 248
 249 static const struct file_operations uapsd_max_sp_len_ops = {
 250         .read = uapsd_max_sp_len_read,
 251         .write = uapsd_max_sp_len_write,
 252         .open = mac80211_open_file_generic
 253 };
 254
 255 static ssize_t channel_type_read(struct file *file, char __user *user_buf,
 256                        size_t count, loff_t *ppos)
 257 {
 258         struct ieee80211_local *local = file->private_data;
 259         const char *buf;
 260
 261         switch (local->hw.conf.channel_type) {
 262         case NL80211_CHAN_NO_HT:
 263                 buf = "no ht\n";
 264                 break;
 265         case NL80211_CHAN_HT20:
 266                 buf = "ht20\n";
 267                 break;
 268         case NL80211_CHAN_HT40MINUS:
 269                 buf = "ht40-\n";
 270                 break;
 271         case NL80211_CHAN_HT40PLUS:
 272                 buf = "ht40+\n";
 273                 break;
 274         default:
 275                 buf = "???";
 276                 break;
 277         }
 278
 279         return simple_read_from_buffer(user_buf, count, ppos, buf, strlen(buf));
 280 }
 281
 282 static const struct file_operations channel_type_ops = {
 283         .read = channel_type_read,
 284         .open = mac80211_open_file_generic
 285 };
 286
 287 static ssize_t queues_read(struct file *file, char __user *user_buf,
 288                            size_t count, loff_t *ppos)
 289 {
 290         struct ieee80211_local *local = file->private_data;
 291         unsigned long flags;
 292         char buf[IEEE80211_MAX_QUEUES * 20];
 293         int q, res = 0;
 294
 295         spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
 296         for (q = 0; q < local->hw.queues; q++)
 297                 res += sprintf(buf + res, "%02d: %#.8lx/%d\n", q,
 298                                 local->queue_stop_reasons[q],
 299                                 skb_queue_len(&local->pending[q]));
 300         spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
 301
 302         return simple_read_from_buffer(user_buf, count, ppos, buf, res);
 303 }
 304
 305 static const struct file_operations queues_ops = {
 306         .read = queues_read,
 307         .open = mac80211_open_file_generic
 308 };
 309
 310 /* statistics stuff */
 311
 312 static ssize_t format_devstat_counter(struct ieee80211_local *local,
 313         char __user *userbuf,
 314         size_t count, loff_t *ppos,
 315         int (*printvalue)(struct ieee80211_low_level_stats *stats, char *buf,
 316                           int buflen))
 317 {
 318         struct ieee80211_low_level_stats stats;
 319         char buf[20];
 320         int res;
 321
 322         rtnl_lock();
 323         res = drv_get_stats(local, &stats);
 324         rtnl_unlock();
 325         if (res)
 326                 return res;
 327         res = printvalue(&stats, buf, sizeof(buf));
 328         return simple_read_from_buffer(userbuf, count, ppos, buf, res);
 329 }
 330
 331 #define DEBUGFS_DEVSTATS_FILE(name)                                     \
 332 static int print_devstats_##name(struct ieee80211_low_level_stats *stats,\
 333                                  char *buf, int buflen)                 \
 334 {                                                                       \
 335         return scnprintf(buf, buflen, "%u\n", stats->name);             \
 336 }                                                                       \
 337 static ssize_t stats_ ##name## _read(struct file *file,                 \
 338                                      char __user *userbuf,              \
 339                                      size_t count, loff_t *ppos)        \
 340 {                                                                       \
 341         return format_devstat_counter(file->private_data,               \
 342                                       userbuf,                          \
 343                                       count,                            \
 344                                       ppos,                             \
 345                                       print_devstats_##name);           \
 346 }                                                                       \
 347                                                                         \
 348 static const struct file_operations stats_ ##name## _ops = {            \
 349         .read = stats_ ##name## _read,                                  \
 350         .open = mac80211_open_file_generic,                             \
 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.keys = debugfs_create_dir("keys", phyd);
 372
 373         DEBUGFS_ADD(frequency);
 374         DEBUGFS_ADD(total_ps_buffered);
 375         DEBUGFS_ADD(wep_iv);
 376         DEBUGFS_ADD(tsf);
 377         DEBUGFS_ADD(queues);
 378         DEBUGFS_ADD_MODE(reset, 0200);
 379         DEBUGFS_ADD(noack);
 380         DEBUGFS_ADD(uapsd_queues);
 381         DEBUGFS_ADD(uapsd_max_sp_len);
 382         DEBUGFS_ADD(channel_type);
 383
 384         statsd = debugfs_create_dir("statistics", phyd);
 385
 386         /* if the dir failed, don't put all the other things into the root! */
 387         if (!statsd)
 388                 return;
 389
 390         DEBUGFS_STATS_ADD(transmitted_fragment_count,
 391                 local->dot11TransmittedFragmentCount);
 392         DEBUGFS_STATS_ADD(multicast_transmitted_frame_count,
 393                 local->dot11MulticastTransmittedFrameCount);
 394         DEBUGFS_STATS_ADD(failed_count, local->dot11FailedCount);
 395         DEBUGFS_STATS_ADD(retry_count, local->dot11RetryCount);
 396         DEBUGFS_STATS_ADD(multiple_retry_count,
 397                 local->dot11MultipleRetryCount);
 398         DEBUGFS_STATS_ADD(frame_duplicate_count,
 399                 local->dot11FrameDuplicateCount);
 400         DEBUGFS_STATS_ADD(received_fragment_count,
 401                 local->dot11ReceivedFragmentCount);
 402         DEBUGFS_STATS_ADD(multicast_received_frame_count,
 403                 local->dot11MulticastReceivedFrameCount);
 404         DEBUGFS_STATS_ADD(transmitted_frame_count,
 405                 local->dot11TransmittedFrameCount);
 406 #ifdef CONFIG_MAC80211_DEBUG_COUNTERS
 407         DEBUGFS_STATS_ADD(tx_handlers_drop, local->tx_handlers_drop);
 408         DEBUGFS_STATS_ADD(tx_handlers_queued, local->tx_handlers_queued);
 409         DEBUGFS_STATS_ADD(tx_handlers_drop_unencrypted,
 410                 local->tx_handlers_drop_unencrypted);
 411         DEBUGFS_STATS_ADD(tx_handlers_drop_fragment,
 412                 local->tx_handlers_drop_fragment);
 413         DEBUGFS_STATS_ADD(tx_handlers_drop_wep,
 414                 local->tx_handlers_drop_wep);
 415         DEBUGFS_STATS_ADD(tx_handlers_drop_not_assoc,
 416                 local->tx_handlers_drop_not_assoc);
 417         DEBUGFS_STATS_ADD(tx_handlers_drop_unauth_port,
 418                 local->tx_handlers_drop_unauth_port);
 419         DEBUGFS_STATS_ADD(rx_handlers_drop, local->rx_handlers_drop);
 420         DEBUGFS_STATS_ADD(rx_handlers_queued, local->rx_handlers_queued);
 421         DEBUGFS_STATS_ADD(rx_handlers_drop_nullfunc,
 422                 local->rx_handlers_drop_nullfunc);
 423         DEBUGFS_STATS_ADD(rx_handlers_drop_defrag,
 424                 local->rx_handlers_drop_defrag);
 425         DEBUGFS_STATS_ADD(rx_handlers_drop_short,
 426                 local->rx_handlers_drop_short);
 427         DEBUGFS_STATS_ADD(rx_handlers_drop_passive_scan,
 428                 local->rx_handlers_drop_passive_scan);
 429         DEBUGFS_STATS_ADD(tx_expand_skb_head,
 430                 local->tx_expand_skb_head);
 431         DEBUGFS_STATS_ADD(tx_expand_skb_head_cloned,
 432                 local->tx_expand_skb_head_cloned);
 433         DEBUGFS_STATS_ADD(rx_expand_skb_head,
 434                 local->rx_expand_skb_head);
 435         DEBUGFS_STATS_ADD(rx_expand_skb_head2,
 436                 local->rx_expand_skb_head2);
 437         DEBUGFS_STATS_ADD(rx_handlers_fragments,
 438                 local->rx_handlers_fragments);
 439         DEBUGFS_STATS_ADD(tx_status_drop,
 440                 local->tx_status_drop);
 441 #endif
 442         DEBUGFS_DEVSTATS_ADD(dot11ACKFailureCount);
 443         DEBUGFS_DEVSTATS_ADD(dot11RTSFailureCount);
 444         DEBUGFS_DEVSTATS_ADD(dot11FCSErrorCount);
 445         DEBUGFS_DEVSTATS_ADD(dot11RTSSuccessCount);
 446 }