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   1 /*
   2  * mac80211 debugfs for wireless PHYs
   3  *
   4  * Copyright 2007       Johannes Berg <johannes@sipsolutions.net>
   5  *
   6  * GPLv2
   7  *
   8  */
   9
  10 #include <linux/debugfs.h>
  11 #include <linux/rtnetlink.h>
  12 #include "ieee80211_i.h"
  13 #include "driver-ops.h"
  14 #include "rate.h"
  15 #include "debugfs.h"
  16
  17 int mac80211_open_file_generic(struct inode *inode, struct file *file)
  18 {
  19         file->private_data = inode->i_private;
  20         return 0;
  21 }
  22
  23 #define DEBUGFS_READONLY_FILE(name, buflen, fmt, value...)              \
  24 static ssize_t name## _read(struct file *file, char __user *userbuf,    \
  25                             size_t count, loff_t *ppos)                 \
  26 {                                                                       \
  27         struct ieee80211_local *local = file->private_data;             \
  28         char buf[buflen];                                               \
  29         int res;                                                        \
  30                                                                         \
  31         res = scnprintf(buf, buflen, fmt "\n", ##value);                \
  32         return simple_read_from_buffer(userbuf, count, ppos, buf, res); \
  33 }                                                                       \
  34                                                                         \
  35 static const struct file_operations name## _ops = {                     \
  36         .read = name## _read,                                           \
  37         .open = mac80211_open_file_generic,                             \
  38 };
  39
  40 #define DEBUGFS_ADD(name)                                               \
  41         local->debugfs.name = debugfs_create_file(#name, 0400, phyd,    \
  42                                                   local, &name## _ops);
  43
  44 #define DEBUGFS_ADD_MODE(name, mode)                                    \
  45         local->debugfs.name = debugfs_create_file(#name, mode, phyd,    \
  46                                                   local, &name## _ops);
  47
  48 #define DEBUGFS_DEL(name)                                               \
  49         debugfs_remove(local->debugfs.name);                            \
  50         local->debugfs.name = NULL;
  51
  52
  53 DEBUGFS_READONLY_FILE(frequency, 20, "%d",
  54                       local->hw.conf.channel->center_freq);
  55 DEBUGFS_READONLY_FILE(total_ps_buffered, 20, "%d",
  56                       local->total_ps_buffered);
  57 DEBUGFS_READONLY_FILE(wep_iv, 20, "%#08x",
  58                       local->wep_iv & 0xffffff);
  59 DEBUGFS_READONLY_FILE(rate_ctrl_alg, 100, "%s",
  60                       local->rate_ctrl ? local->rate_ctrl->ops->name : "<unset>");
  61
  62 static ssize_t tsf_read(struct file *file, char __user *user_buf,
  63                              size_t count, loff_t *ppos)
  64 {
  65         struct ieee80211_local *local = file->private_data;
  66         u64 tsf;
  67         char buf[100];
  68
  69         tsf = drv_get_tsf(local);
  70
  71         snprintf(buf, sizeof(buf), "0x%016llx\n", (unsigned long long) tsf);
  72
  73         return simple_read_from_buffer(user_buf, count, ppos, buf, 19);
  74 }
  75
  76 static ssize_t tsf_write(struct file *file,
  77                          const char __user *user_buf,
  78                          size_t count, loff_t *ppos)
  79 {
  80         struct ieee80211_local *local = file->private_data;
  81         unsigned long long tsf;
  82         char buf[100];
  83         size_t len;
  84
  85         len = min(count, sizeof(buf) - 1);
  86         if (copy_from_user(buf, user_buf, len))
  87                 return -EFAULT;
  88         buf[len] = '\0';
  89
  90         if (strncmp(buf, "reset", 5) == 0) {
  91                 if (local->ops->reset_tsf) {
  92                         drv_reset_tsf(local);
  93                         printk(KERN_INFO "%s: debugfs reset TSF\n", wiphy_name(local->hw.wiphy));
  94                 }
  95         } else {
  96                 tsf = simple_strtoul(buf, NULL, 0);
  97                 if (local->ops->set_tsf) {
  98                         drv_set_tsf(local, tsf);
  99                         printk(KERN_INFO "%s: debugfs set TSF to %#018llx\n", wiphy_name(local->hw.wiphy), tsf);
 100                 }
 101         }
 102
 103         return count;
 104 }
 105
 106 static const struct file_operations tsf_ops = {
 107         .read = tsf_read,
 108         .write = tsf_write,
 109         .open = mac80211_open_file_generic
 110 };
 111
 112 static ssize_t reset_write(struct file *file, const char __user *user_buf,
 113                            size_t count, loff_t *ppos)
 114 {
 115         struct ieee80211_local *local = file->private_data;
 116
 117         rtnl_lock();
 118         __ieee80211_suspend(&local->hw);
 119         __ieee80211_resume(&local->hw);
 120         rtnl_unlock();
 121
 122         return count;
 123 }
 124
 125 static const struct file_operations reset_ops = {
 126         .write = reset_write,
 127         .open = mac80211_open_file_generic,
 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 };
 165
 166 static ssize_t queues_read(struct file *file, char __user *user_buf,
 167                            size_t count, loff_t *ppos)
 168 {
 169         struct ieee80211_local *local = file->private_data;
 170         unsigned long flags;
 171         char buf[IEEE80211_MAX_QUEUES * 20];
 172         int q, res = 0;
 173
 174         spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
 175         for (q = 0; q < local->hw.queues; q++)
 176                 res += sprintf(buf + res, "%02d: %#.8lx/%d\n", q,
 177                                 local->queue_stop_reasons[q],
 178                                 skb_queue_len(&local->pending[q]));
 179         spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
 180
 181         return simple_read_from_buffer(user_buf, count, ppos, buf, res);
 182 }
 183
 184 static const struct file_operations queues_ops = {
 185         .read = queues_read,
 186         .open = mac80211_open_file_generic
 187 };
 188
 189 /* statistics stuff */
 190
 191 #define DEBUGFS_STATS_FILE(name, buflen, fmt, value...)                 \
 192         DEBUGFS_READONLY_FILE(stats_ ##name, buflen, fmt, ##value)
 193
 194 static ssize_t format_devstat_counter(struct ieee80211_local *local,
 195         char __user *userbuf,
 196         size_t count, loff_t *ppos,
 197         int (*printvalue)(struct ieee80211_low_level_stats *stats, char *buf,
 198                           int buflen))
 199 {
 200         struct ieee80211_low_level_stats stats;
 201         char buf[20];
 202         int res;
 203
 204         rtnl_lock();
 205         res = drv_get_stats(local, &stats);
 206         rtnl_unlock();
 207         if (res)
 208                 return res;
 209         res = printvalue(&stats, buf, sizeof(buf));
 210         return simple_read_from_buffer(userbuf, count, ppos, buf, res);
 211 }
 212
 213 #define DEBUGFS_DEVSTATS_FILE(name)                                     \
 214 static int print_devstats_##name(struct ieee80211_low_level_stats *stats,\
 215                                  char *buf, int buflen)                 \
 216 {                                                                       \
 217         return scnprintf(buf, buflen, "%u\n", stats->name);             \
 218 }                                                                       \
 219 static ssize_t stats_ ##name## _read(struct file *file,                 \
 220                                      char __user *userbuf,              \
 221                                      size_t count, loff_t *ppos)        \
 222 {                                                                       \
 223         return format_devstat_counter(file->private_data,               \
 224                                       userbuf,                          \
 225                                       count,                            \
 226                                       ppos,                             \
 227                                       print_devstats_##name);           \
 228 }                                                                       \
 229                                                                         \
 230 static const struct file_operations stats_ ##name## _ops = {            \
 231         .read = stats_ ##name## _read,                                  \
 232         .open = mac80211_open_file_generic,                             \
 233 };
 234
 235 #define DEBUGFS_STATS_ADD(name)                                         \
 236         local->debugfs.stats.name = debugfs_create_file(#name, 0400, statsd,\
 237                 local, &stats_ ##name## _ops);
 238
 239 #define DEBUGFS_STATS_DEL(name)                                         \
 240         debugfs_remove(local->debugfs.stats.name);                      \
 241         local->debugfs.stats.name = NULL;
 242
 243 DEBUGFS_STATS_FILE(transmitted_fragment_count, 20, "%u",
 244                    local->dot11TransmittedFragmentCount);
 245 DEBUGFS_STATS_FILE(multicast_transmitted_frame_count, 20, "%u",
 246                    local->dot11MulticastTransmittedFrameCount);
 247 DEBUGFS_STATS_FILE(failed_count, 20, "%u",
 248                    local->dot11FailedCount);
 249 DEBUGFS_STATS_FILE(retry_count, 20, "%u",
 250                    local->dot11RetryCount);
 251 DEBUGFS_STATS_FILE(multiple_retry_count, 20, "%u",
 252                    local->dot11MultipleRetryCount);
 253 DEBUGFS_STATS_FILE(frame_duplicate_count, 20, "%u",
 254                    local->dot11FrameDuplicateCount);
 255 DEBUGFS_STATS_FILE(received_fragment_count, 20, "%u",
 256                    local->dot11ReceivedFragmentCount);
 257 DEBUGFS_STATS_FILE(multicast_received_frame_count, 20, "%u",
 258                    local->dot11MulticastReceivedFrameCount);
 259 DEBUGFS_STATS_FILE(transmitted_frame_count, 20, "%u",
 260                    local->dot11TransmittedFrameCount);
 261 #ifdef CONFIG_MAC80211_DEBUG_COUNTERS
 262 DEBUGFS_STATS_FILE(tx_handlers_drop, 20, "%u",
 263                    local->tx_handlers_drop);
 264 DEBUGFS_STATS_FILE(tx_handlers_queued, 20, "%u",
 265                    local->tx_handlers_queued);
 266 DEBUGFS_STATS_FILE(tx_handlers_drop_unencrypted, 20, "%u",
 267                    local->tx_handlers_drop_unencrypted);
 268 DEBUGFS_STATS_FILE(tx_handlers_drop_fragment, 20, "%u",
 269                    local->tx_handlers_drop_fragment);
 270 DEBUGFS_STATS_FILE(tx_handlers_drop_wep, 20, "%u",
 271                    local->tx_handlers_drop_wep);
 272 DEBUGFS_STATS_FILE(tx_handlers_drop_not_assoc, 20, "%u",
 273                    local->tx_handlers_drop_not_assoc);
 274 DEBUGFS_STATS_FILE(tx_handlers_drop_unauth_port, 20, "%u",
 275                    local->tx_handlers_drop_unauth_port);
 276 DEBUGFS_STATS_FILE(rx_handlers_drop, 20, "%u",
 277                    local->rx_handlers_drop);
 278 DEBUGFS_STATS_FILE(rx_handlers_queued, 20, "%u",
 279                    local->rx_handlers_queued);
 280 DEBUGFS_STATS_FILE(rx_handlers_drop_nullfunc, 20, "%u",
 281                    local->rx_handlers_drop_nullfunc);
 282 DEBUGFS_STATS_FILE(rx_handlers_drop_defrag, 20, "%u",
 283                    local->rx_handlers_drop_defrag);
 284 DEBUGFS_STATS_FILE(rx_handlers_drop_short, 20, "%u",
 285                    local->rx_handlers_drop_short);
 286 DEBUGFS_STATS_FILE(rx_handlers_drop_passive_scan, 20, "%u",
 287                    local->rx_handlers_drop_passive_scan);
 288 DEBUGFS_STATS_FILE(tx_expand_skb_head, 20, "%u",
 289                    local->tx_expand_skb_head);
 290 DEBUGFS_STATS_FILE(tx_expand_skb_head_cloned, 20, "%u",
 291                    local->tx_expand_skb_head_cloned);
 292 DEBUGFS_STATS_FILE(rx_expand_skb_head, 20, "%u",
 293                    local->rx_expand_skb_head);
 294 DEBUGFS_STATS_FILE(rx_expand_skb_head2, 20, "%u",
 295                    local->rx_expand_skb_head2);
 296 DEBUGFS_STATS_FILE(rx_handlers_fragments, 20, "%u",
 297                    local->rx_handlers_fragments);
 298 DEBUGFS_STATS_FILE(tx_status_drop, 20, "%u",
 299                    local->tx_status_drop);
 300
 301 #endif
 302
 303 DEBUGFS_DEVSTATS_FILE(dot11ACKFailureCount);
 304 DEBUGFS_DEVSTATS_FILE(dot11RTSFailureCount);
 305 DEBUGFS_DEVSTATS_FILE(dot11FCSErrorCount);
 306 DEBUGFS_DEVSTATS_FILE(dot11RTSSuccessCount);
 307
 308
 309 void debugfs_hw_add(struct ieee80211_local *local)
 310 {
 311         struct dentry *phyd = local->hw.wiphy->debugfsdir;
 312         struct dentry *statsd;
 313
 314         if (!phyd)
 315                 return;
 316
 317         local->debugfs.stations = debugfs_create_dir("stations", phyd);
 318         local->debugfs.keys = debugfs_create_dir("keys", phyd);
 319
 320         DEBUGFS_ADD(frequency);
 321         DEBUGFS_ADD(total_ps_buffered);
 322         DEBUGFS_ADD(wep_iv);
 323         DEBUGFS_ADD(tsf);
 324         DEBUGFS_ADD(queues);
 325         DEBUGFS_ADD_MODE(reset, 0200);
 326         DEBUGFS_ADD(noack);
 327
 328         statsd = debugfs_create_dir("statistics", phyd);
 329         local->debugfs.statistics = statsd;
 330
 331         /* if the dir failed, don't put all the other things into the root! */
 332         if (!statsd)
 333                 return;
 334
 335         DEBUGFS_STATS_ADD(transmitted_fragment_count);
 336         DEBUGFS_STATS_ADD(multicast_transmitted_frame_count);
 337         DEBUGFS_STATS_ADD(failed_count);
 338         DEBUGFS_STATS_ADD(retry_count);
 339         DEBUGFS_STATS_ADD(multiple_retry_count);
 340         DEBUGFS_STATS_ADD(frame_duplicate_count);
 341         DEBUGFS_STATS_ADD(received_fragment_count);
 342         DEBUGFS_STATS_ADD(multicast_received_frame_count);
 343         DEBUGFS_STATS_ADD(transmitted_frame_count);
 344 #ifdef CONFIG_MAC80211_DEBUG_COUNTERS
 345         DEBUGFS_STATS_ADD(tx_handlers_drop);
 346         DEBUGFS_STATS_ADD(tx_handlers_queued);
 347         DEBUGFS_STATS_ADD(tx_handlers_drop_unencrypted);
 348         DEBUGFS_STATS_ADD(tx_handlers_drop_fragment);
 349         DEBUGFS_STATS_ADD(tx_handlers_drop_wep);
 350         DEBUGFS_STATS_ADD(tx_handlers_drop_not_assoc);
 351         DEBUGFS_STATS_ADD(tx_handlers_drop_unauth_port);
 352         DEBUGFS_STATS_ADD(rx_handlers_drop);
 353         DEBUGFS_STATS_ADD(rx_handlers_queued);
 354         DEBUGFS_STATS_ADD(rx_handlers_drop_nullfunc);
 355         DEBUGFS_STATS_ADD(rx_handlers_drop_defrag);
 356         DEBUGFS_STATS_ADD(rx_handlers_drop_short);
 357         DEBUGFS_STATS_ADD(rx_handlers_drop_passive_scan);
 358         DEBUGFS_STATS_ADD(tx_expand_skb_head);
 359         DEBUGFS_STATS_ADD(tx_expand_skb_head_cloned);
 360         DEBUGFS_STATS_ADD(rx_expand_skb_head);
 361         DEBUGFS_STATS_ADD(rx_expand_skb_head2);
 362         DEBUGFS_STATS_ADD(rx_handlers_fragments);
 363         DEBUGFS_STATS_ADD(tx_status_drop);
 364 #endif
 365         DEBUGFS_STATS_ADD(dot11ACKFailureCount);
 366         DEBUGFS_STATS_ADD(dot11RTSFailureCount);
 367         DEBUGFS_STATS_ADD(dot11FCSErrorCount);
 368         DEBUGFS_STATS_ADD(dot11RTSSuccessCount);
 369 }
 370
 371 void debugfs_hw_del(struct ieee80211_local *local)
 372 {
 373         DEBUGFS_DEL(frequency);
 374         DEBUGFS_DEL(total_ps_buffered);
 375         DEBUGFS_DEL(wep_iv);
 376         DEBUGFS_DEL(tsf);
 377         DEBUGFS_DEL(queues);
 378         DEBUGFS_DEL(reset);
 379         DEBUGFS_DEL(noack);
 380
 381         DEBUGFS_STATS_DEL(transmitted_fragment_count);
 382         DEBUGFS_STATS_DEL(multicast_transmitted_frame_count);
 383         DEBUGFS_STATS_DEL(failed_count);
 384         DEBUGFS_STATS_DEL(retry_count);
 385         DEBUGFS_STATS_DEL(multiple_retry_count);
 386         DEBUGFS_STATS_DEL(frame_duplicate_count);
 387         DEBUGFS_STATS_DEL(received_fragment_count);
 388         DEBUGFS_STATS_DEL(multicast_received_frame_count);
 389         DEBUGFS_STATS_DEL(transmitted_frame_count);
 390         DEBUGFS_STATS_DEL(num_scans);
 391 #ifdef CONFIG_MAC80211_DEBUG_COUNTERS
 392         DEBUGFS_STATS_DEL(tx_handlers_drop);
 393         DEBUGFS_STATS_DEL(tx_handlers_queued);
 394         DEBUGFS_STATS_DEL(tx_handlers_drop_unencrypted);
 395         DEBUGFS_STATS_DEL(tx_handlers_drop_fragment);
 396         DEBUGFS_STATS_DEL(tx_handlers_drop_wep);
 397         DEBUGFS_STATS_DEL(tx_handlers_drop_not_assoc);
 398         DEBUGFS_STATS_DEL(tx_handlers_drop_unauth_port);
 399         DEBUGFS_STATS_DEL(rx_handlers_drop);
 400         DEBUGFS_STATS_DEL(rx_handlers_queued);
 401         DEBUGFS_STATS_DEL(rx_handlers_drop_nullfunc);
 402         DEBUGFS_STATS_DEL(rx_handlers_drop_defrag);
 403         DEBUGFS_STATS_DEL(rx_handlers_drop_short);
 404         DEBUGFS_STATS_DEL(rx_handlers_drop_passive_scan);
 405         DEBUGFS_STATS_DEL(tx_expand_skb_head);
 406         DEBUGFS_STATS_DEL(tx_expand_skb_head_cloned);
 407         DEBUGFS_STATS_DEL(rx_expand_skb_head);
 408         DEBUGFS_STATS_DEL(rx_expand_skb_head2);
 409         DEBUGFS_STATS_DEL(rx_handlers_fragments);
 410         DEBUGFS_STATS_DEL(tx_status_drop);
 411 #endif
 412         DEBUGFS_STATS_DEL(dot11ACKFailureCount);
 413         DEBUGFS_STATS_DEL(dot11RTSFailureCount);
 414         DEBUGFS_STATS_DEL(dot11FCSErrorCount);
 415         DEBUGFS_STATS_DEL(dot11RTSSuccessCount);
 416
 417         debugfs_remove(local->debugfs.statistics);
 418         local->debugfs.statistics = NULL;
 419         debugfs_remove(local->debugfs.stations);
 420         local->debugfs.stations = NULL;
 421         debugfs_remove(local->debugfs.keys);
 422         local->debugfs.keys = NULL;
 423 }