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 "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(rts_threshold, 20, "%d",
  56                       local->hw.wiphy->rts_threshold);
  57 DEBUGFS_READONLY_FILE(fragmentation_threshold, 20, "%d",
  58                       local->hw.wiphy->frag_threshold);
  59 DEBUGFS_READONLY_FILE(short_retry_limit, 20, "%d",
  60                       local->hw.wiphy->retry_short);
  61 DEBUGFS_READONLY_FILE(long_retry_limit, 20, "%d",
  62                       local->hw.wiphy->retry_long);
  63 DEBUGFS_READONLY_FILE(total_ps_buffered, 20, "%d",
  64                       local->total_ps_buffered);
  65 DEBUGFS_READONLY_FILE(wep_iv, 20, "%#08x",
  66                       local->wep_iv & 0xffffff);
  67 DEBUGFS_READONLY_FILE(rate_ctrl_alg, 100, "%s",
  68                       local->rate_ctrl ? local->rate_ctrl->ops->name : "<unset>");
  69
  70 static ssize_t tsf_read(struct file *file, char __user *user_buf,
  71                              size_t count, loff_t *ppos)
  72 {
  73         struct ieee80211_local *local = file->private_data;
  74         u64 tsf;
  75         char buf[100];
  76
  77         tsf = drv_get_tsf(local);
  78
  79         snprintf(buf, sizeof(buf), "0x%016llx\n", (unsigned long long) tsf);
  80
  81         return simple_read_from_buffer(user_buf, count, ppos, buf, 19);
  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                         printk(KERN_INFO "%s: debugfs reset TSF\n", wiphy_name(local->hw.wiphy));
 102                 }
 103         } else {
 104                 tsf = simple_strtoul(buf, NULL, 0);
 105                 if (local->ops->set_tsf) {
 106                         drv_set_tsf(local, tsf);
 107                         printk(KERN_INFO "%s: debugfs set TSF to %#018llx\n", wiphy_name(local->hw.wiphy), tsf);
 108                 }
 109         }
 110
 111         return count;
 112 }
 113
 114 static const struct file_operations tsf_ops = {
 115         .read = tsf_read,
 116         .write = tsf_write,
 117         .open = mac80211_open_file_generic
 118 };
 119
 120 static ssize_t reset_write(struct file *file, const char __user *user_buf,
 121                            size_t count, loff_t *ppos)
 122 {
 123         struct ieee80211_local *local = file->private_data;
 124
 125         rtnl_lock();
 126         __ieee80211_suspend(&local->hw);
 127         __ieee80211_resume(&local->hw);
 128         rtnl_unlock();
 129
 130         return count;
 131 }
 132
 133 static const struct file_operations reset_ops = {
 134         .write = reset_write,
 135         .open = mac80211_open_file_generic,
 136 };
 137
 138 static ssize_t noack_read(struct file *file, char __user *user_buf,
 139                           size_t count, loff_t *ppos)
 140 {
 141         struct ieee80211_local *local = file->private_data;
 142         int res;
 143         char buf[10];
 144
 145         res = scnprintf(buf, sizeof(buf), "%d\n", local->wifi_wme_noack_test);
 146
 147         return simple_read_from_buffer(user_buf, count, ppos, buf, res);
 148 }
 149
 150 static ssize_t noack_write(struct file *file,
 151                            const char __user *user_buf,
 152                            size_t count, loff_t *ppos)
 153 {
 154         struct ieee80211_local *local = file->private_data;
 155         char buf[10];
 156         size_t len;
 157
 158         len = min(count, sizeof(buf) - 1);
 159         if (copy_from_user(buf, user_buf, len))
 160                 return -EFAULT;
 161         buf[len] = '\0';
 162
 163         local->wifi_wme_noack_test = !!simple_strtoul(buf, NULL, 0);
 164
 165         return count;
 166 }
 167
 168 static const struct file_operations noack_ops = {
 169         .read = noack_read,
 170         .write = noack_write,
 171         .open = mac80211_open_file_generic
 172 };
 173
 174 /* statistics stuff */
 175
 176 #define DEBUGFS_STATS_FILE(name, buflen, fmt, value...)                 \
 177         DEBUGFS_READONLY_FILE(stats_ ##name, buflen, fmt, ##value)
 178
 179 static ssize_t format_devstat_counter(struct ieee80211_local *local,
 180         char __user *userbuf,
 181         size_t count, loff_t *ppos,
 182         int (*printvalue)(struct ieee80211_low_level_stats *stats, char *buf,
 183                           int buflen))
 184 {
 185         struct ieee80211_low_level_stats stats;
 186         char buf[20];
 187         int res;
 188
 189         rtnl_lock();
 190         res = drv_get_stats(local, &stats);
 191         rtnl_unlock();
 192         if (res)
 193                 return res;
 194         res = printvalue(&stats, buf, sizeof(buf));
 195         return simple_read_from_buffer(userbuf, count, ppos, buf, res);
 196 }
 197
 198 #define DEBUGFS_DEVSTATS_FILE(name)                                     \
 199 static int print_devstats_##name(struct ieee80211_low_level_stats *stats,\
 200                                  char *buf, int buflen)                 \
 201 {                                                                       \
 202         return scnprintf(buf, buflen, "%u\n", stats->name);             \
 203 }                                                                       \
 204 static ssize_t stats_ ##name## _read(struct file *file,                 \
 205                                      char __user *userbuf,              \
 206                                      size_t count, loff_t *ppos)        \
 207 {                                                                       \
 208         return format_devstat_counter(file->private_data,               \
 209                                       userbuf,                          \
 210                                       count,                            \
 211                                       ppos,                             \
 212                                       print_devstats_##name);           \
 213 }                                                                       \
 214                                                                         \
 215 static const struct file_operations stats_ ##name## _ops = {            \
 216         .read = stats_ ##name## _read,                                  \
 217         .open = mac80211_open_file_generic,                             \
 218 };
 219
 220 #define DEBUGFS_STATS_ADD(name)                                         \
 221         local->debugfs.stats.name = debugfs_create_file(#name, 0400, statsd,\
 222                 local, &stats_ ##name## _ops);
 223
 224 #define DEBUGFS_STATS_DEL(name)                                         \
 225         debugfs_remove(local->debugfs.stats.name);                      \
 226         local->debugfs.stats.name = NULL;
 227
 228 DEBUGFS_STATS_FILE(transmitted_fragment_count, 20, "%u",
 229                    local->dot11TransmittedFragmentCount);
 230 DEBUGFS_STATS_FILE(multicast_transmitted_frame_count, 20, "%u",
 231                    local->dot11MulticastTransmittedFrameCount);
 232 DEBUGFS_STATS_FILE(failed_count, 20, "%u",
 233                    local->dot11FailedCount);
 234 DEBUGFS_STATS_FILE(retry_count, 20, "%u",
 235                    local->dot11RetryCount);
 236 DEBUGFS_STATS_FILE(multiple_retry_count, 20, "%u",
 237                    local->dot11MultipleRetryCount);
 238 DEBUGFS_STATS_FILE(frame_duplicate_count, 20, "%u",
 239                    local->dot11FrameDuplicateCount);
 240 DEBUGFS_STATS_FILE(received_fragment_count, 20, "%u",
 241                    local->dot11ReceivedFragmentCount);
 242 DEBUGFS_STATS_FILE(multicast_received_frame_count, 20, "%u",
 243                    local->dot11MulticastReceivedFrameCount);
 244 DEBUGFS_STATS_FILE(transmitted_frame_count, 20, "%u",
 245                    local->dot11TransmittedFrameCount);
 246 #ifdef CONFIG_MAC80211_DEBUG_COUNTERS
 247 DEBUGFS_STATS_FILE(tx_handlers_drop, 20, "%u",
 248                    local->tx_handlers_drop);
 249 DEBUGFS_STATS_FILE(tx_handlers_queued, 20, "%u",
 250                    local->tx_handlers_queued);
 251 DEBUGFS_STATS_FILE(tx_handlers_drop_unencrypted, 20, "%u",
 252                    local->tx_handlers_drop_unencrypted);
 253 DEBUGFS_STATS_FILE(tx_handlers_drop_fragment, 20, "%u",
 254                    local->tx_handlers_drop_fragment);
 255 DEBUGFS_STATS_FILE(tx_handlers_drop_wep, 20, "%u",
 256                    local->tx_handlers_drop_wep);
 257 DEBUGFS_STATS_FILE(tx_handlers_drop_not_assoc, 20, "%u",
 258                    local->tx_handlers_drop_not_assoc);
 259 DEBUGFS_STATS_FILE(tx_handlers_drop_unauth_port, 20, "%u",
 260                    local->tx_handlers_drop_unauth_port);
 261 DEBUGFS_STATS_FILE(rx_handlers_drop, 20, "%u",
 262                    local->rx_handlers_drop);
 263 DEBUGFS_STATS_FILE(rx_handlers_queued, 20, "%u",
 264                    local->rx_handlers_queued);
 265 DEBUGFS_STATS_FILE(rx_handlers_drop_nullfunc, 20, "%u",
 266                    local->rx_handlers_drop_nullfunc);
 267 DEBUGFS_STATS_FILE(rx_handlers_drop_defrag, 20, "%u",
 268                    local->rx_handlers_drop_defrag);
 269 DEBUGFS_STATS_FILE(rx_handlers_drop_short, 20, "%u",
 270                    local->rx_handlers_drop_short);
 271 DEBUGFS_STATS_FILE(rx_handlers_drop_passive_scan, 20, "%u",
 272                    local->rx_handlers_drop_passive_scan);
 273 DEBUGFS_STATS_FILE(tx_expand_skb_head, 20, "%u",
 274                    local->tx_expand_skb_head);
 275 DEBUGFS_STATS_FILE(tx_expand_skb_head_cloned, 20, "%u",
 276                    local->tx_expand_skb_head_cloned);
 277 DEBUGFS_STATS_FILE(rx_expand_skb_head, 20, "%u",
 278                    local->rx_expand_skb_head);
 279 DEBUGFS_STATS_FILE(rx_expand_skb_head2, 20, "%u",
 280                    local->rx_expand_skb_head2);
 281 DEBUGFS_STATS_FILE(rx_handlers_fragments, 20, "%u",
 282                    local->rx_handlers_fragments);
 283 DEBUGFS_STATS_FILE(tx_status_drop, 20, "%u",
 284                    local->tx_status_drop);
 285
 286 #endif
 287
 288 DEBUGFS_DEVSTATS_FILE(dot11ACKFailureCount);
 289 DEBUGFS_DEVSTATS_FILE(dot11RTSFailureCount);
 290 DEBUGFS_DEVSTATS_FILE(dot11FCSErrorCount);
 291 DEBUGFS_DEVSTATS_FILE(dot11RTSSuccessCount);
 292
 293
 294 void debugfs_hw_add(struct ieee80211_local *local)
 295 {
 296         struct dentry *phyd = local->hw.wiphy->debugfsdir;
 297         struct dentry *statsd;
 298
 299         if (!phyd)
 300                 return;
 301
 302         local->debugfs.stations = debugfs_create_dir("stations", phyd);
 303         local->debugfs.keys = debugfs_create_dir("keys", phyd);
 304
 305         DEBUGFS_ADD(frequency);
 306         DEBUGFS_ADD(rts_threshold);
 307         DEBUGFS_ADD(fragmentation_threshold);
 308         DEBUGFS_ADD(short_retry_limit);
 309         DEBUGFS_ADD(long_retry_limit);
 310         DEBUGFS_ADD(total_ps_buffered);
 311         DEBUGFS_ADD(wep_iv);
 312         DEBUGFS_ADD(tsf);
 313         DEBUGFS_ADD_MODE(reset, 0200);
 314         DEBUGFS_ADD(noack);
 315
 316         statsd = debugfs_create_dir("statistics", phyd);
 317         local->debugfs.statistics = statsd;
 318
 319         /* if the dir failed, don't put all the other things into the root! */
 320         if (!statsd)
 321                 return;
 322
 323         DEBUGFS_STATS_ADD(transmitted_fragment_count);
 324         DEBUGFS_STATS_ADD(multicast_transmitted_frame_count);
 325         DEBUGFS_STATS_ADD(failed_count);
 326         DEBUGFS_STATS_ADD(retry_count);
 327         DEBUGFS_STATS_ADD(multiple_retry_count);
 328         DEBUGFS_STATS_ADD(frame_duplicate_count);
 329         DEBUGFS_STATS_ADD(received_fragment_count);
 330         DEBUGFS_STATS_ADD(multicast_received_frame_count);
 331         DEBUGFS_STATS_ADD(transmitted_frame_count);
 332 #ifdef CONFIG_MAC80211_DEBUG_COUNTERS
 333         DEBUGFS_STATS_ADD(tx_handlers_drop);
 334         DEBUGFS_STATS_ADD(tx_handlers_queued);
 335         DEBUGFS_STATS_ADD(tx_handlers_drop_unencrypted);
 336         DEBUGFS_STATS_ADD(tx_handlers_drop_fragment);
 337         DEBUGFS_STATS_ADD(tx_handlers_drop_wep);
 338         DEBUGFS_STATS_ADD(tx_handlers_drop_not_assoc);
 339         DEBUGFS_STATS_ADD(tx_handlers_drop_unauth_port);
 340         DEBUGFS_STATS_ADD(rx_handlers_drop);
 341         DEBUGFS_STATS_ADD(rx_handlers_queued);
 342         DEBUGFS_STATS_ADD(rx_handlers_drop_nullfunc);
 343         DEBUGFS_STATS_ADD(rx_handlers_drop_defrag);
 344         DEBUGFS_STATS_ADD(rx_handlers_drop_short);
 345         DEBUGFS_STATS_ADD(rx_handlers_drop_passive_scan);
 346         DEBUGFS_STATS_ADD(tx_expand_skb_head);
 347         DEBUGFS_STATS_ADD(tx_expand_skb_head_cloned);
 348         DEBUGFS_STATS_ADD(rx_expand_skb_head);
 349         DEBUGFS_STATS_ADD(rx_expand_skb_head2);
 350         DEBUGFS_STATS_ADD(rx_handlers_fragments);
 351         DEBUGFS_STATS_ADD(tx_status_drop);
 352 #endif
 353         DEBUGFS_STATS_ADD(dot11ACKFailureCount);
 354         DEBUGFS_STATS_ADD(dot11RTSFailureCount);
 355         DEBUGFS_STATS_ADD(dot11FCSErrorCount);
 356         DEBUGFS_STATS_ADD(dot11RTSSuccessCount);
 357 }
 358
 359 void debugfs_hw_del(struct ieee80211_local *local)
 360 {
 361         DEBUGFS_DEL(frequency);
 362         DEBUGFS_DEL(rts_threshold);
 363         DEBUGFS_DEL(fragmentation_threshold);
 364         DEBUGFS_DEL(short_retry_limit);
 365         DEBUGFS_DEL(long_retry_limit);
 366         DEBUGFS_DEL(total_ps_buffered);
 367         DEBUGFS_DEL(wep_iv);
 368         DEBUGFS_DEL(tsf);
 369         DEBUGFS_DEL(reset);
 370         DEBUGFS_DEL(noack);
 371
 372         DEBUGFS_STATS_DEL(transmitted_fragment_count);
 373         DEBUGFS_STATS_DEL(multicast_transmitted_frame_count);
 374         DEBUGFS_STATS_DEL(failed_count);
 375         DEBUGFS_STATS_DEL(retry_count);
 376         DEBUGFS_STATS_DEL(multiple_retry_count);
 377         DEBUGFS_STATS_DEL(frame_duplicate_count);
 378         DEBUGFS_STATS_DEL(received_fragment_count);
 379         DEBUGFS_STATS_DEL(multicast_received_frame_count);
 380         DEBUGFS_STATS_DEL(transmitted_frame_count);
 381         DEBUGFS_STATS_DEL(num_scans);
 382 #ifdef CONFIG_MAC80211_DEBUG_COUNTERS
 383         DEBUGFS_STATS_DEL(tx_handlers_drop);
 384         DEBUGFS_STATS_DEL(tx_handlers_queued);
 385         DEBUGFS_STATS_DEL(tx_handlers_drop_unencrypted);
 386         DEBUGFS_STATS_DEL(tx_handlers_drop_fragment);
 387         DEBUGFS_STATS_DEL(tx_handlers_drop_wep);
 388         DEBUGFS_STATS_DEL(tx_handlers_drop_not_assoc);
 389         DEBUGFS_STATS_DEL(tx_handlers_drop_unauth_port);
 390         DEBUGFS_STATS_DEL(rx_handlers_drop);
 391         DEBUGFS_STATS_DEL(rx_handlers_queued);
 392         DEBUGFS_STATS_DEL(rx_handlers_drop_nullfunc);
 393         DEBUGFS_STATS_DEL(rx_handlers_drop_defrag);
 394         DEBUGFS_STATS_DEL(rx_handlers_drop_short);
 395         DEBUGFS_STATS_DEL(rx_handlers_drop_passive_scan);
 396         DEBUGFS_STATS_DEL(tx_expand_skb_head);
 397         DEBUGFS_STATS_DEL(tx_expand_skb_head_cloned);
 398         DEBUGFS_STATS_DEL(rx_expand_skb_head);
 399         DEBUGFS_STATS_DEL(rx_expand_skb_head2);
 400         DEBUGFS_STATS_DEL(rx_handlers_fragments);
 401         DEBUGFS_STATS_DEL(tx_status_drop);
 402 #endif
 403         DEBUGFS_STATS_DEL(dot11ACKFailureCount);
 404         DEBUGFS_STATS_DEL(dot11RTSFailureCount);
 405         DEBUGFS_STATS_DEL(dot11FCSErrorCount);
 406         DEBUGFS_STATS_DEL(dot11RTSSuccessCount);
 407
 408         debugfs_remove(local->debugfs.statistics);
 409         local->debugfs.statistics = NULL;
 410         debugfs_remove(local->debugfs.stations);
 411         local->debugfs.stations = NULL;
 412         debugfs_remove(local->debugfs.keys);
 413         local->debugfs.keys = NULL;
 414 }