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 "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 #define DEBUGFS_READONLY_FILE(name, buflen, fmt, value...)              \
  23 static ssize_t name## _read(struct file *file, char __user *userbuf,    \
  24                             size_t count, loff_t *ppos)                 \
  25 {                                                                       \
  26         struct ieee80211_local *local = file->private_data;             \
  27         char buf[buflen];                                               \
  28         int res;                                                        \
  29                                                                         \
  30         res = scnprintf(buf, buflen, fmt "\n", ##value);                \
  31         return simple_read_from_buffer(userbuf, count, ppos, buf, res); \
  32 }                                                                       \
  33                                                                         \
  34 static const struct file_operations name## _ops = {                     \
  35         .read = name## _read,                                           \
  36         .open = mac80211_open_file_generic,                             \
  37 };
  38
  39 #define DEBUGFS_ADD(name)                                               \
  40         local->debugfs.name = debugfs_create_file(#name, 0400, phyd,    \
  41                                                   local, &name## _ops);
  42
  43 #define DEBUGFS_ADD_MODE(name, mode)                                    \
  44         local->debugfs.name = debugfs_create_file(#name, mode, phyd,    \
  45                                                   local, &name## _ops);
  46
  47 #define DEBUGFS_DEL(name)                                               \
  48         debugfs_remove(local->debugfs.name);                            \
  49         local->debugfs.name = NULL;
  50
  51
  52 DEBUGFS_READONLY_FILE(frequency, 20, "%d",
  53                       local->hw.conf.channel->center_freq);
  54 DEBUGFS_READONLY_FILE(rts_threshold, 20, "%d",
  55                       local->rts_threshold);
  56 DEBUGFS_READONLY_FILE(fragmentation_threshold, 20, "%d",
  57                       local->fragmentation_threshold);
  58 DEBUGFS_READONLY_FILE(short_retry_limit, 20, "%d",
  59                       local->hw.conf.short_frame_max_tx_count);
  60 DEBUGFS_READONLY_FILE(long_retry_limit, 20, "%d",
  61                       local->hw.conf.long_frame_max_tx_count);
  62 DEBUGFS_READONLY_FILE(total_ps_buffered, 20, "%d",
  63                       local->total_ps_buffered);
  64 DEBUGFS_READONLY_FILE(wep_iv, 20, "%#08x",
  65                       local->wep_iv & 0xffffff);
  66 DEBUGFS_READONLY_FILE(rate_ctrl_alg, 100, "%s",
  67                       local->rate_ctrl ? local->rate_ctrl->ops->name : "<unset>");
  68
  69 static ssize_t tsf_read(struct file *file, char __user *user_buf,
  70                              size_t count, loff_t *ppos)
  71 {
  72         struct ieee80211_local *local = file->private_data;
  73         u64 tsf = 0;
  74         char buf[100];
  75
  76         if (local->ops->get_tsf)
  77                 tsf = local->ops->get_tsf(local_to_hw(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                         local->ops->reset_tsf(local_to_hw(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                         local->ops->set_tsf(local_to_hw(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 /* statistics stuff */
 139
 140 #define DEBUGFS_STATS_FILE(name, buflen, fmt, value...)                 \
 141         DEBUGFS_READONLY_FILE(stats_ ##name, buflen, fmt, ##value)
 142
 143 static ssize_t format_devstat_counter(struct ieee80211_local *local,
 144         char __user *userbuf,
 145         size_t count, loff_t *ppos,
 146         int (*printvalue)(struct ieee80211_low_level_stats *stats, char *buf,
 147                           int buflen))
 148 {
 149         struct ieee80211_low_level_stats stats;
 150         char buf[20];
 151         int res;
 152
 153         if (!local->ops->get_stats)
 154                 return -EOPNOTSUPP;
 155
 156         rtnl_lock();
 157         res = local->ops->get_stats(local_to_hw(local), &stats);
 158         rtnl_unlock();
 159         if (!res)
 160                 res = printvalue(&stats, buf, sizeof(buf));
 161         return simple_read_from_buffer(userbuf, count, ppos, buf, res);
 162 }
 163
 164 #define DEBUGFS_DEVSTATS_FILE(name)                                     \
 165 static int print_devstats_##name(struct ieee80211_low_level_stats *stats,\
 166                                  char *buf, int buflen)                 \
 167 {                                                                       \
 168         return scnprintf(buf, buflen, "%u\n", stats->name);             \
 169 }                                                                       \
 170 static ssize_t stats_ ##name## _read(struct file *file,                 \
 171                                      char __user *userbuf,              \
 172                                      size_t count, loff_t *ppos)        \
 173 {                                                                       \
 174         return format_devstat_counter(file->private_data,               \
 175                                       userbuf,                          \
 176                                       count,                            \
 177                                       ppos,                             \
 178                                       print_devstats_##name);           \
 179 }                                                                       \
 180                                                                         \
 181 static const struct file_operations stats_ ##name## _ops = {            \
 182         .read = stats_ ##name## _read,                                  \
 183         .open = mac80211_open_file_generic,                             \
 184 };
 185
 186 #define DEBUGFS_STATS_ADD(name)                                         \
 187         local->debugfs.stats.name = debugfs_create_file(#name, 0400, statsd,\
 188                 local, &stats_ ##name## _ops);
 189
 190 #define DEBUGFS_STATS_DEL(name)                                         \
 191         debugfs_remove(local->debugfs.stats.name);                      \
 192         local->debugfs.stats.name = NULL;
 193
 194 DEBUGFS_STATS_FILE(transmitted_fragment_count, 20, "%u",
 195                    local->dot11TransmittedFragmentCount);
 196 DEBUGFS_STATS_FILE(multicast_transmitted_frame_count, 20, "%u",
 197                    local->dot11MulticastTransmittedFrameCount);
 198 DEBUGFS_STATS_FILE(failed_count, 20, "%u",
 199                    local->dot11FailedCount);
 200 DEBUGFS_STATS_FILE(retry_count, 20, "%u",
 201                    local->dot11RetryCount);
 202 DEBUGFS_STATS_FILE(multiple_retry_count, 20, "%u",
 203                    local->dot11MultipleRetryCount);
 204 DEBUGFS_STATS_FILE(frame_duplicate_count, 20, "%u",
 205                    local->dot11FrameDuplicateCount);
 206 DEBUGFS_STATS_FILE(received_fragment_count, 20, "%u",
 207                    local->dot11ReceivedFragmentCount);
 208 DEBUGFS_STATS_FILE(multicast_received_frame_count, 20, "%u",
 209                    local->dot11MulticastReceivedFrameCount);
 210 DEBUGFS_STATS_FILE(transmitted_frame_count, 20, "%u",
 211                    local->dot11TransmittedFrameCount);
 212 #ifdef CONFIG_MAC80211_DEBUG_COUNTERS
 213 DEBUGFS_STATS_FILE(tx_handlers_drop, 20, "%u",
 214                    local->tx_handlers_drop);
 215 DEBUGFS_STATS_FILE(tx_handlers_queued, 20, "%u",
 216                    local->tx_handlers_queued);
 217 DEBUGFS_STATS_FILE(tx_handlers_drop_unencrypted, 20, "%u",
 218                    local->tx_handlers_drop_unencrypted);
 219 DEBUGFS_STATS_FILE(tx_handlers_drop_fragment, 20, "%u",
 220                    local->tx_handlers_drop_fragment);
 221 DEBUGFS_STATS_FILE(tx_handlers_drop_wep, 20, "%u",
 222                    local->tx_handlers_drop_wep);
 223 DEBUGFS_STATS_FILE(tx_handlers_drop_not_assoc, 20, "%u",
 224                    local->tx_handlers_drop_not_assoc);
 225 DEBUGFS_STATS_FILE(tx_handlers_drop_unauth_port, 20, "%u",
 226                    local->tx_handlers_drop_unauth_port);
 227 DEBUGFS_STATS_FILE(rx_handlers_drop, 20, "%u",
 228                    local->rx_handlers_drop);
 229 DEBUGFS_STATS_FILE(rx_handlers_queued, 20, "%u",
 230                    local->rx_handlers_queued);
 231 DEBUGFS_STATS_FILE(rx_handlers_drop_nullfunc, 20, "%u",
 232                    local->rx_handlers_drop_nullfunc);
 233 DEBUGFS_STATS_FILE(rx_handlers_drop_defrag, 20, "%u",
 234                    local->rx_handlers_drop_defrag);
 235 DEBUGFS_STATS_FILE(rx_handlers_drop_short, 20, "%u",
 236                    local->rx_handlers_drop_short);
 237 DEBUGFS_STATS_FILE(rx_handlers_drop_passive_scan, 20, "%u",
 238                    local->rx_handlers_drop_passive_scan);
 239 DEBUGFS_STATS_FILE(tx_expand_skb_head, 20, "%u",
 240                    local->tx_expand_skb_head);
 241 DEBUGFS_STATS_FILE(tx_expand_skb_head_cloned, 20, "%u",
 242                    local->tx_expand_skb_head_cloned);
 243 DEBUGFS_STATS_FILE(rx_expand_skb_head, 20, "%u",
 244                    local->rx_expand_skb_head);
 245 DEBUGFS_STATS_FILE(rx_expand_skb_head2, 20, "%u",
 246                    local->rx_expand_skb_head2);
 247 DEBUGFS_STATS_FILE(rx_handlers_fragments, 20, "%u",
 248                    local->rx_handlers_fragments);
 249 DEBUGFS_STATS_FILE(tx_status_drop, 20, "%u",
 250                    local->tx_status_drop);
 251
 252 #endif
 253
 254 DEBUGFS_DEVSTATS_FILE(dot11ACKFailureCount);
 255 DEBUGFS_DEVSTATS_FILE(dot11RTSFailureCount);
 256 DEBUGFS_DEVSTATS_FILE(dot11FCSErrorCount);
 257 DEBUGFS_DEVSTATS_FILE(dot11RTSSuccessCount);
 258
 259
 260 void debugfs_hw_add(struct ieee80211_local *local)
 261 {
 262         struct dentry *phyd = local->hw.wiphy->debugfsdir;
 263         struct dentry *statsd;
 264
 265         if (!phyd)
 266                 return;
 267
 268         local->debugfs.stations = debugfs_create_dir("stations", phyd);
 269         local->debugfs.keys = debugfs_create_dir("keys", phyd);
 270
 271         DEBUGFS_ADD(frequency);
 272         DEBUGFS_ADD(rts_threshold);
 273         DEBUGFS_ADD(fragmentation_threshold);
 274         DEBUGFS_ADD(short_retry_limit);
 275         DEBUGFS_ADD(long_retry_limit);
 276         DEBUGFS_ADD(total_ps_buffered);
 277         DEBUGFS_ADD(wep_iv);
 278         DEBUGFS_ADD(tsf);
 279         DEBUGFS_ADD_MODE(reset, 0200);
 280
 281         statsd = debugfs_create_dir("statistics", phyd);
 282         local->debugfs.statistics = statsd;
 283
 284         /* if the dir failed, don't put all the other things into the root! */
 285         if (!statsd)
 286                 return;
 287
 288         DEBUGFS_STATS_ADD(transmitted_fragment_count);
 289         DEBUGFS_STATS_ADD(multicast_transmitted_frame_count);
 290         DEBUGFS_STATS_ADD(failed_count);
 291         DEBUGFS_STATS_ADD(retry_count);
 292         DEBUGFS_STATS_ADD(multiple_retry_count);
 293         DEBUGFS_STATS_ADD(frame_duplicate_count);
 294         DEBUGFS_STATS_ADD(received_fragment_count);
 295         DEBUGFS_STATS_ADD(multicast_received_frame_count);
 296         DEBUGFS_STATS_ADD(transmitted_frame_count);
 297 #ifdef CONFIG_MAC80211_DEBUG_COUNTERS
 298         DEBUGFS_STATS_ADD(tx_handlers_drop);
 299         DEBUGFS_STATS_ADD(tx_handlers_queued);
 300         DEBUGFS_STATS_ADD(tx_handlers_drop_unencrypted);
 301         DEBUGFS_STATS_ADD(tx_handlers_drop_fragment);
 302         DEBUGFS_STATS_ADD(tx_handlers_drop_wep);
 303         DEBUGFS_STATS_ADD(tx_handlers_drop_not_assoc);
 304         DEBUGFS_STATS_ADD(tx_handlers_drop_unauth_port);
 305         DEBUGFS_STATS_ADD(rx_handlers_drop);
 306         DEBUGFS_STATS_ADD(rx_handlers_queued);
 307         DEBUGFS_STATS_ADD(rx_handlers_drop_nullfunc);
 308         DEBUGFS_STATS_ADD(rx_handlers_drop_defrag);
 309         DEBUGFS_STATS_ADD(rx_handlers_drop_short);
 310         DEBUGFS_STATS_ADD(rx_handlers_drop_passive_scan);
 311         DEBUGFS_STATS_ADD(tx_expand_skb_head);
 312         DEBUGFS_STATS_ADD(tx_expand_skb_head_cloned);
 313         DEBUGFS_STATS_ADD(rx_expand_skb_head);
 314         DEBUGFS_STATS_ADD(rx_expand_skb_head2);
 315         DEBUGFS_STATS_ADD(rx_handlers_fragments);
 316         DEBUGFS_STATS_ADD(tx_status_drop);
 317 #endif
 318         DEBUGFS_STATS_ADD(dot11ACKFailureCount);
 319         DEBUGFS_STATS_ADD(dot11RTSFailureCount);
 320         DEBUGFS_STATS_ADD(dot11FCSErrorCount);
 321         DEBUGFS_STATS_ADD(dot11RTSSuccessCount);
 322 }
 323
 324 void debugfs_hw_del(struct ieee80211_local *local)
 325 {
 326         DEBUGFS_DEL(frequency);
 327         DEBUGFS_DEL(rts_threshold);
 328         DEBUGFS_DEL(fragmentation_threshold);
 329         DEBUGFS_DEL(short_retry_limit);
 330         DEBUGFS_DEL(long_retry_limit);
 331         DEBUGFS_DEL(total_ps_buffered);
 332         DEBUGFS_DEL(wep_iv);
 333         DEBUGFS_DEL(tsf);
 334         DEBUGFS_DEL(reset);
 335
 336         DEBUGFS_STATS_DEL(transmitted_fragment_count);
 337         DEBUGFS_STATS_DEL(multicast_transmitted_frame_count);
 338         DEBUGFS_STATS_DEL(failed_count);
 339         DEBUGFS_STATS_DEL(retry_count);
 340         DEBUGFS_STATS_DEL(multiple_retry_count);
 341         DEBUGFS_STATS_DEL(frame_duplicate_count);
 342         DEBUGFS_STATS_DEL(received_fragment_count);
 343         DEBUGFS_STATS_DEL(multicast_received_frame_count);
 344         DEBUGFS_STATS_DEL(transmitted_frame_count);
 345         DEBUGFS_STATS_DEL(num_scans);
 346 #ifdef CONFIG_MAC80211_DEBUG_COUNTERS
 347         DEBUGFS_STATS_DEL(tx_handlers_drop);
 348         DEBUGFS_STATS_DEL(tx_handlers_queued);
 349         DEBUGFS_STATS_DEL(tx_handlers_drop_unencrypted);
 350         DEBUGFS_STATS_DEL(tx_handlers_drop_fragment);
 351         DEBUGFS_STATS_DEL(tx_handlers_drop_wep);
 352         DEBUGFS_STATS_DEL(tx_handlers_drop_not_assoc);
 353         DEBUGFS_STATS_DEL(tx_handlers_drop_unauth_port);
 354         DEBUGFS_STATS_DEL(rx_handlers_drop);
 355         DEBUGFS_STATS_DEL(rx_handlers_queued);
 356         DEBUGFS_STATS_DEL(rx_handlers_drop_nullfunc);
 357         DEBUGFS_STATS_DEL(rx_handlers_drop_defrag);
 358         DEBUGFS_STATS_DEL(rx_handlers_drop_short);
 359         DEBUGFS_STATS_DEL(rx_handlers_drop_passive_scan);
 360         DEBUGFS_STATS_DEL(tx_expand_skb_head);
 361         DEBUGFS_STATS_DEL(tx_expand_skb_head_cloned);
 362         DEBUGFS_STATS_DEL(rx_expand_skb_head);
 363         DEBUGFS_STATS_DEL(rx_expand_skb_head2);
 364         DEBUGFS_STATS_DEL(rx_handlers_fragments);
 365         DEBUGFS_STATS_DEL(tx_status_drop);
 366 #endif
 367         DEBUGFS_STATS_DEL(dot11ACKFailureCount);
 368         DEBUGFS_STATS_DEL(dot11RTSFailureCount);
 369         DEBUGFS_STATS_DEL(dot11FCSErrorCount);
 370         DEBUGFS_STATS_DEL(dot11RTSSuccessCount);
 371
 372         debugfs_remove(local->debugfs.statistics);
 373         local->debugfs.statistics = NULL;
 374         debugfs_remove(local->debugfs.stations);
 375         local->debugfs.stations = NULL;
 376         debugfs_remove(local->debugfs.keys);
 377         local->debugfs.keys = NULL;
 378 }