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