net/mac80211/debugfs.c

   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 "ieee80211_rate.h"
  14 #include "debugfs.h"
  15
  16 int mac80211_open_file_generic(struct inode *inode, struct file *file)
  17 {
  18         file->private_data = inode->i_private;
  19         return 0;
  20 }
  21
  22 static const char *ieee80211_mode_str(int mode)
  23 {
  24         switch (mode) {
  25         case MODE_IEEE80211A:
  26                 return "IEEE 802.11a";
  27         case MODE_IEEE80211B:
  28                 return "IEEE 802.11b";
  29         case MODE_IEEE80211G:
  30                 return "IEEE 802.11g";
  31         case MODE_ATHEROS_TURBO:
  32                 return "Atheros Turbo (5 GHz)";
  33         default:
  34                 return "UNKNOWN";
  35         }
  36 }
  37
  38 static ssize_t modes_read(struct file *file, char __user *userbuf,
  39                           size_t count, loff_t *ppos)
  40 {
  41         struct ieee80211_local *local = file->private_data;
  42         struct ieee80211_hw_mode *mode;
  43         char buf[150], *p = buf;
  44
  45         /* FIXME: locking! */
  46         list_for_each_entry(mode, &local->modes_list, list) {
  47                 p += scnprintf(p, sizeof(buf)+buf-p,
  48                                "%s\n", ieee80211_mode_str(mode->mode));
  49         }
  50
  51         return simple_read_from_buffer(userbuf, count, ppos, buf, p-buf);
  52 }
  53
  54 static const struct file_operations modes_ops = {
  55         .read = modes_read,
  56         .open = mac80211_open_file_generic,
  57 };
  58
  59 #define DEBUGFS_READONLY_FILE(name, buflen, fmt, value...)              \
  60 static ssize_t name## _read(struct file *file, char __user *userbuf,    \
  61                             size_t count, loff_t *ppos)                 \
  62 {                                                                       \
  63         struct ieee80211_local *local = file->private_data;             \
  64         char buf[buflen];                                               \
  65         int res;                                                        \
  66                                                                         \
  67         res = scnprintf(buf, buflen, fmt "\n", ##value);                \
  68         return simple_read_from_buffer(userbuf, count, ppos, buf, res); \
  69 }                                                                       \
  70                                                                         \
  71 static const struct file_operations name## _ops = {                     \
  72         .read = name## _read,                                           \
  73         .open = mac80211_open_file_generic,                             \
  74 };
  75
  76 #define DEBUGFS_ADD(name)                                               \
  77         local->debugfs.name = debugfs_create_file(#name, 0444, phyd,    \
  78                                                   local, &name## _ops);
  79
  80 #define DEBUGFS_DEL(name)                                               \
  81         debugfs_remove(local->debugfs.name);                            \
  82         local->debugfs.name = NULL;
  83
  84
  85 DEBUGFS_READONLY_FILE(channel, 20, "%d",
  86                       local->hw.conf.channel);
  87 DEBUGFS_READONLY_FILE(frequency, 20, "%d",
  88                       local->hw.conf.freq);
  89 DEBUGFS_READONLY_FILE(radar_detect, 20, "%d",
  90                       local->hw.conf.radar_detect);
  91 DEBUGFS_READONLY_FILE(antenna_sel_tx, 20, "%d",
  92                       local->hw.conf.antenna_sel_tx);
  93 DEBUGFS_READONLY_FILE(antenna_sel_rx, 20, "%d",
  94                       local->hw.conf.antenna_sel_rx);
  95 DEBUGFS_READONLY_FILE(bridge_packets, 20, "%d",
  96                       local->bridge_packets);
  97 DEBUGFS_READONLY_FILE(key_tx_rx_threshold, 20, "%d",
  98                       local->key_tx_rx_threshold);
  99 DEBUGFS_READONLY_FILE(rts_threshold, 20, "%d",
 100                       local->rts_threshold);
 101 DEBUGFS_READONLY_FILE(fragmentation_threshold, 20, "%d",
 102                       local->fragmentation_threshold);
 103 DEBUGFS_READONLY_FILE(short_retry_limit, 20, "%d",
 104                       local->short_retry_limit);
 105 DEBUGFS_READONLY_FILE(long_retry_limit, 20, "%d",
 106                       local->long_retry_limit);
 107 DEBUGFS_READONLY_FILE(total_ps_buffered, 20, "%d",
 108                       local->total_ps_buffered);
 109 DEBUGFS_READONLY_FILE(mode, 20, "%s",
 110                       ieee80211_mode_str(local->hw.conf.phymode));
 111 DEBUGFS_READONLY_FILE(wep_iv, 20, "%#06x",
 112                       local->wep_iv & 0xffffff);
 113 DEBUGFS_READONLY_FILE(tx_power_reduction, 20, "%d.%d dBm",
 114                       local->hw.conf.tx_power_reduction / 10,
 115                       local->hw.conf.tx_power_reduction % 10);
 116 DEBUGFS_READONLY_FILE(rate_ctrl_alg, 100, "%s",
 117                       local->rate_ctrl ? local->rate_ctrl->ops->name : "<unset>");
 118
 119 /* statistics stuff */
 120
 121 static inline int rtnl_lock_local(struct ieee80211_local *local)
 122 {
 123         rtnl_lock();
 124         if (unlikely(local->reg_state != IEEE80211_DEV_REGISTERED)) {
 125                 rtnl_unlock();
 126                 return -ENODEV;
 127         }
 128         return 0;
 129 }
 130
 131 #define DEBUGFS_STATS_FILE(name, buflen, fmt, value...)                 \
 132         DEBUGFS_READONLY_FILE(stats_ ##name, buflen, fmt, ##value)
 133
 134 static ssize_t format_devstat_counter(struct ieee80211_local *local,
 135         char __user *userbuf,
 136         size_t count, loff_t *ppos,
 137         int (*printvalue)(struct ieee80211_low_level_stats *stats, char *buf,
 138                           int buflen))
 139 {
 140         struct ieee80211_low_level_stats stats;
 141         char buf[20];
 142         int res;
 143
 144         if (!local->ops->get_stats)
 145                 return -EOPNOTSUPP;
 146
 147         res = rtnl_lock_local(local);
 148         if (res)
 149                 return res;
 150
 151         res = local->ops->get_stats(local_to_hw(local), &stats);
 152         rtnl_unlock();
 153         if (!res)
 154                 res = printvalue(&stats, buf, sizeof(buf));
 155         return simple_read_from_buffer(userbuf, count, ppos, buf, res);
 156 }
 157
 158 #define DEBUGFS_DEVSTATS_FILE(name)                                     \
 159 static int print_devstats_##name(struct ieee80211_low_level_stats *stats,\
 160                                  char *buf, int buflen)                 \
 161 {                                                                       \
 162         return scnprintf(buf, buflen, "%u\n", stats->name);             \
 163 }                                                                       \
 164 static ssize_t stats_ ##name## _read(struct file *file,                 \
 165                                      char __user *userbuf,              \
 166                                      size_t count, loff_t *ppos)        \
 167 {                                                                       \
 168         return format_devstat_counter(file->private_data,               \
 169                                       userbuf,                          \
 170                                       count,                            \
 171                                       ppos,                             \
 172                                       print_devstats_##name);           \
 173 }                                                                       \
 174                                                                         \
 175 static const struct file_operations stats_ ##name## _ops = {            \
 176         .read = stats_ ##name## _read,                                  \
 177         .open = mac80211_open_file_generic,                             \
 178 };
 179
 180 #define DEBUGFS_STATS_ADD(name)                                         \
 181         local->debugfs.stats.name = debugfs_create_file(#name, 0444, statsd,\
 182                 local, &stats_ ##name## _ops);
 183
 184 #define DEBUGFS_STATS_DEL(name)                                         \
 185         debugfs_remove(local->debugfs.stats.name);                      \
 186         local->debugfs.stats.name = NULL;
 187
 188 DEBUGFS_STATS_FILE(transmitted_fragment_count, 20, "%u",
 189                    local->dot11TransmittedFragmentCount);
 190 DEBUGFS_STATS_FILE(multicast_transmitted_frame_count, 20, "%u",
 191                    local->dot11MulticastTransmittedFrameCount);
 192 DEBUGFS_STATS_FILE(failed_count, 20, "%u",
 193                    local->dot11FailedCount);
 194 DEBUGFS_STATS_FILE(retry_count, 20, "%u",
 195                    local->dot11RetryCount);
 196 DEBUGFS_STATS_FILE(multiple_retry_count, 20, "%u",
 197                    local->dot11MultipleRetryCount);
 198 DEBUGFS_STATS_FILE(frame_duplicate_count, 20, "%u",
 199                    local->dot11FrameDuplicateCount);
 200 DEBUGFS_STATS_FILE(received_fragment_count, 20, "%u",
 201                    local->dot11ReceivedFragmentCount);
 202 DEBUGFS_STATS_FILE(multicast_received_frame_count, 20, "%u",
 203                    local->dot11MulticastReceivedFrameCount);
 204 DEBUGFS_STATS_FILE(transmitted_frame_count, 20, "%u",
 205                    local->dot11TransmittedFrameCount);
 206 DEBUGFS_STATS_FILE(wep_undecryptable_count, 20, "%u",
 207                    local->dot11WEPUndecryptableCount);
 208 #ifdef CONFIG_MAC80211_DEBUG_COUNTERS
 209 DEBUGFS_STATS_FILE(tx_handlers_drop, 20, "%u",
 210                    local->tx_handlers_drop);
 211 DEBUGFS_STATS_FILE(tx_handlers_queued, 20, "%u",
 212                    local->tx_handlers_queued);
 213 DEBUGFS_STATS_FILE(tx_handlers_drop_unencrypted, 20, "%u",
 214                    local->tx_handlers_drop_unencrypted);
 215 DEBUGFS_STATS_FILE(tx_handlers_drop_fragment, 20, "%u",
 216                    local->tx_handlers_drop_fragment);
 217 DEBUGFS_STATS_FILE(tx_handlers_drop_wep, 20, "%u",
 218                    local->tx_handlers_drop_wep);
 219 DEBUGFS_STATS_FILE(tx_handlers_drop_not_assoc, 20, "%u",
 220                    local->tx_handlers_drop_not_assoc);
 221 DEBUGFS_STATS_FILE(tx_handlers_drop_unauth_port, 20, "%u",
 222                    local->tx_handlers_drop_unauth_port);
 223 DEBUGFS_STATS_FILE(rx_handlers_drop, 20, "%u",
 224                    local->rx_handlers_drop);
 225 DEBUGFS_STATS_FILE(rx_handlers_queued, 20, "%u",
 226                    local->rx_handlers_queued);
 227 DEBUGFS_STATS_FILE(rx_handlers_drop_nullfunc, 20, "%u",
 228                    local->rx_handlers_drop_nullfunc);
 229 DEBUGFS_STATS_FILE(rx_handlers_drop_defrag, 20, "%u",
 230                    local->rx_handlers_drop_defrag);
 231 DEBUGFS_STATS_FILE(rx_handlers_drop_short, 20, "%u",
 232                    local->rx_handlers_drop_short);
 233 DEBUGFS_STATS_FILE(rx_handlers_drop_passive_scan, 20, "%u",
 234                    local->rx_handlers_drop_passive_scan);
 235 DEBUGFS_STATS_FILE(tx_expand_skb_head, 20, "%u",
 236                    local->tx_expand_skb_head);
 237 DEBUGFS_STATS_FILE(tx_expand_skb_head_cloned, 20, "%u",
 238                    local->tx_expand_skb_head_cloned);
 239 DEBUGFS_STATS_FILE(rx_expand_skb_head, 20, "%u",
 240                    local->rx_expand_skb_head);
 241 DEBUGFS_STATS_FILE(rx_expand_skb_head2, 20, "%u",
 242                    local->rx_expand_skb_head2);
 243 DEBUGFS_STATS_FILE(rx_handlers_fragments, 20, "%u",
 244                    local->rx_handlers_fragments);
 245 DEBUGFS_STATS_FILE(tx_status_drop, 20, "%u",
 246                    local->tx_status_drop);
 247
 248 static ssize_t stats_wme_rx_queue_read(struct file *file,
 249                                        char __user *userbuf,
 250                                        size_t count, loff_t *ppos)
 251 {
 252         struct ieee80211_local *local = file->private_data;
 253         char buf[NUM_RX_DATA_QUEUES*15], *p = buf;
 254         int i;
 255
 256         for (i = 0; i < NUM_RX_DATA_QUEUES; i++)
 257                 p += scnprintf(p, sizeof(buf)+buf-p,
 258                                "%u\n", local->wme_rx_queue[i]);
 259
 260         return simple_read_from_buffer(userbuf, count, ppos, buf, p-buf);
 261 }
 262
 263 static const struct file_operations stats_wme_rx_queue_ops = {
 264         .read = stats_wme_rx_queue_read,
 265         .open = mac80211_open_file_generic,
 266 };
 267
 268 static ssize_t stats_wme_tx_queue_read(struct file *file,
 269                                        char __user *userbuf,
 270                                        size_t count, loff_t *ppos)
 271 {
 272         struct ieee80211_local *local = file->private_data;
 273         char buf[NUM_TX_DATA_QUEUES*15], *p = buf;
 274         int i;
 275
 276         for (i = 0; i < NUM_TX_DATA_QUEUES; i++)
 277                 p += scnprintf(p, sizeof(buf)+buf-p,
 278                                "%u\n", local->wme_tx_queue[i]);
 279
 280         return simple_read_from_buffer(userbuf, count, ppos, buf, p-buf);
 281 }
 282
 283 static const struct file_operations stats_wme_tx_queue_ops = {
 284         .read = stats_wme_tx_queue_read,
 285         .open = mac80211_open_file_generic,
 286 };
 287 #endif
 288
 289 DEBUGFS_DEVSTATS_FILE(dot11ACKFailureCount);
 290 DEBUGFS_DEVSTATS_FILE(dot11RTSFailureCount);
 291 DEBUGFS_DEVSTATS_FILE(dot11FCSErrorCount);
 292 DEBUGFS_DEVSTATS_FILE(dot11RTSSuccessCount);
 293
 294
 295 void debugfs_hw_add(struct ieee80211_local *local)
 296 {
 297         struct dentry *phyd = local->hw.wiphy->debugfsdir;
 298         struct dentry *statsd;
 299
 300         if (!phyd)
 301                 return;
 302
 303         local->debugfs.stations = debugfs_create_dir("stations", phyd);
 304         local->debugfs.keys = debugfs_create_dir("keys", phyd);
 305
 306         DEBUGFS_ADD(channel);
 307         DEBUGFS_ADD(frequency);
 308         DEBUGFS_ADD(radar_detect);
 309         DEBUGFS_ADD(antenna_sel_tx);
 310         DEBUGFS_ADD(antenna_sel_rx);
 311         DEBUGFS_ADD(bridge_packets);
 312         DEBUGFS_ADD(key_tx_rx_threshold);
 313         DEBUGFS_ADD(rts_threshold);
 314         DEBUGFS_ADD(fragmentation_threshold);
 315         DEBUGFS_ADD(short_retry_limit);
 316         DEBUGFS_ADD(long_retry_limit);
 317         DEBUGFS_ADD(total_ps_buffered);
 318         DEBUGFS_ADD(mode);
 319         DEBUGFS_ADD(wep_iv);
 320         DEBUGFS_ADD(tx_power_reduction);
 321         DEBUGFS_ADD(modes);
 322
 323         statsd = debugfs_create_dir("statistics", phyd);
 324         local->debugfs.statistics = statsd;
 325
 326         /* if the dir failed, don't put all the other things into the root! */
 327         if (!statsd)
 328                 return;
 329
 330         DEBUGFS_STATS_ADD(transmitted_fragment_count);
 331         DEBUGFS_STATS_ADD(multicast_transmitted_frame_count);
 332         DEBUGFS_STATS_ADD(failed_count);
 333         DEBUGFS_STATS_ADD(retry_count);
 334         DEBUGFS_STATS_ADD(multiple_retry_count);
 335         DEBUGFS_STATS_ADD(frame_duplicate_count);
 336         DEBUGFS_STATS_ADD(received_fragment_count);
 337         DEBUGFS_STATS_ADD(multicast_received_frame_count);
 338         DEBUGFS_STATS_ADD(transmitted_frame_count);
 339         DEBUGFS_STATS_ADD(wep_undecryptable_count);
 340 #ifdef CONFIG_MAC80211_DEBUG_COUNTERS
 341         DEBUGFS_STATS_ADD(tx_handlers_drop);
 342         DEBUGFS_STATS_ADD(tx_handlers_queued);
 343         DEBUGFS_STATS_ADD(tx_handlers_drop_unencrypted);
 344         DEBUGFS_STATS_ADD(tx_handlers_drop_fragment);
 345         DEBUGFS_STATS_ADD(tx_handlers_drop_wep);
 346         DEBUGFS_STATS_ADD(tx_handlers_drop_not_assoc);
 347         DEBUGFS_STATS_ADD(tx_handlers_drop_unauth_port);
 348         DEBUGFS_STATS_ADD(rx_handlers_drop);
 349         DEBUGFS_STATS_ADD(rx_handlers_queued);
 350         DEBUGFS_STATS_ADD(rx_handlers_drop_nullfunc);
 351         DEBUGFS_STATS_ADD(rx_handlers_drop_defrag);
 352         DEBUGFS_STATS_ADD(rx_handlers_drop_short);
 353         DEBUGFS_STATS_ADD(rx_handlers_drop_passive_scan);
 354         DEBUGFS_STATS_ADD(tx_expand_skb_head);
 355         DEBUGFS_STATS_ADD(tx_expand_skb_head_cloned);
 356         DEBUGFS_STATS_ADD(rx_expand_skb_head);
 357         DEBUGFS_STATS_ADD(rx_expand_skb_head2);
 358         DEBUGFS_STATS_ADD(rx_handlers_fragments);
 359         DEBUGFS_STATS_ADD(tx_status_drop);
 360         DEBUGFS_STATS_ADD(wme_tx_queue);
 361         DEBUGFS_STATS_ADD(wme_rx_queue);
 362 #endif
 363         DEBUGFS_STATS_ADD(dot11ACKFailureCount);
 364         DEBUGFS_STATS_ADD(dot11RTSFailureCount);
 365         DEBUGFS_STATS_ADD(dot11FCSErrorCount);
 366         DEBUGFS_STATS_ADD(dot11RTSSuccessCount);
 367 }
 368
 369 void debugfs_hw_del(struct ieee80211_local *local)
 370 {
 371         DEBUGFS_DEL(channel);
 372         DEBUGFS_DEL(frequency);
 373         DEBUGFS_DEL(radar_detect);
 374         DEBUGFS_DEL(antenna_sel_tx);
 375         DEBUGFS_DEL(antenna_sel_rx);
 376         DEBUGFS_DEL(bridge_packets);
 377         DEBUGFS_DEL(key_tx_rx_threshold);
 378         DEBUGFS_DEL(rts_threshold);
 379         DEBUGFS_DEL(fragmentation_threshold);
 380         DEBUGFS_DEL(short_retry_limit);
 381         DEBUGFS_DEL(long_retry_limit);
 382         DEBUGFS_DEL(total_ps_buffered);
 383         DEBUGFS_DEL(mode);
 384         DEBUGFS_DEL(wep_iv);
 385         DEBUGFS_DEL(tx_power_reduction);
 386         DEBUGFS_DEL(modes);
 387
 388         DEBUGFS_STATS_DEL(transmitted_fragment_count);
 389         DEBUGFS_STATS_DEL(multicast_transmitted_frame_count);
 390         DEBUGFS_STATS_DEL(failed_count);
 391         DEBUGFS_STATS_DEL(retry_count);
 392         DEBUGFS_STATS_DEL(multiple_retry_count);
 393         DEBUGFS_STATS_DEL(frame_duplicate_count);
 394         DEBUGFS_STATS_DEL(received_fragment_count);
 395         DEBUGFS_STATS_DEL(multicast_received_frame_count);
 396         DEBUGFS_STATS_DEL(transmitted_frame_count);
 397         DEBUGFS_STATS_DEL(wep_undecryptable_count);
 398         DEBUGFS_STATS_DEL(num_scans);
 399 #ifdef CONFIG_MAC80211_DEBUG_COUNTERS
 400         DEBUGFS_STATS_DEL(tx_handlers_drop);
 401         DEBUGFS_STATS_DEL(tx_handlers_queued);
 402         DEBUGFS_STATS_DEL(tx_handlers_drop_unencrypted);
 403         DEBUGFS_STATS_DEL(tx_handlers_drop_fragment);
 404         DEBUGFS_STATS_DEL(tx_handlers_drop_wep);
 405         DEBUGFS_STATS_DEL(tx_handlers_drop_not_assoc);
 406         DEBUGFS_STATS_DEL(tx_handlers_drop_unauth_port);
 407         DEBUGFS_STATS_DEL(rx_handlers_drop);
 408         DEBUGFS_STATS_DEL(rx_handlers_queued);
 409         DEBUGFS_STATS_DEL(rx_handlers_drop_nullfunc);
 410         DEBUGFS_STATS_DEL(rx_handlers_drop_defrag);
 411         DEBUGFS_STATS_DEL(rx_handlers_drop_short);
 412         DEBUGFS_STATS_DEL(rx_handlers_drop_passive_scan);
 413         DEBUGFS_STATS_DEL(tx_expand_skb_head);
 414         DEBUGFS_STATS_DEL(tx_expand_skb_head_cloned);
 415         DEBUGFS_STATS_DEL(rx_expand_skb_head);
 416         DEBUGFS_STATS_DEL(rx_expand_skb_head2);
 417         DEBUGFS_STATS_DEL(rx_handlers_fragments);
 418         DEBUGFS_STATS_DEL(tx_status_drop);
 419         DEBUGFS_STATS_DEL(wme_tx_queue);
 420         DEBUGFS_STATS_DEL(wme_rx_queue);
 421 #endif
 422         DEBUGFS_STATS_DEL(dot11ACKFailureCount);
 423         DEBUGFS_STATS_DEL(dot11RTSFailureCount);
 424         DEBUGFS_STATS_DEL(dot11FCSErrorCount);
 425         DEBUGFS_STATS_DEL(dot11RTSSuccessCount);
 426
 427         debugfs_remove(local->debugfs.statistics);
 428         local->debugfs.statistics = NULL;
 429         debugfs_remove(local->debugfs.stations);
 430         local->debugfs.stations = NULL;
 431         debugfs_remove(local->debugfs.keys);
 432         local->debugfs.keys = NULL;
 433 }