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(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 /* statistics stuff */
 167
 168 #define DEBUGFS_STATS_FILE(name, buflen, fmt, value...)                 \
 169         DEBUGFS_READONLY_FILE(stats_ ##name, buflen, fmt, ##value)
 170
 171 static ssize_t format_devstat_counter(struct ieee80211_local *local,
 172         char __user *userbuf,
 173         size_t count, loff_t *ppos,
 174         int (*printvalue)(struct ieee80211_low_level_stats *stats, char *buf,
 175                           int buflen))
 176 {
 177         struct ieee80211_low_level_stats stats;
 178         char buf[20];
 179         int res;
 180
 181         rtnl_lock();
 182         res = drv_get_stats(local, &stats);
 183         rtnl_unlock();
 184         if (res)
 185                 return res;
 186         res = printvalue(&stats, buf, sizeof(buf));
 187         return simple_read_from_buffer(userbuf, count, ppos, buf, res);
 188 }
 189
 190 #define DEBUGFS_DEVSTATS_FILE(name)                                     \
 191 static int print_devstats_##name(struct ieee80211_low_level_stats *stats,\
 192                                  char *buf, int buflen)                 \
 193 {                                                                       \
 194         return scnprintf(buf, buflen, "%u\n", stats->name);             \
 195 }                                                                       \
 196 static ssize_t stats_ ##name## _read(struct file *file,                 \
 197                                      char __user *userbuf,              \
 198                                      size_t count, loff_t *ppos)        \
 199 {                                                                       \
 200         return format_devstat_counter(file->private_data,               \
 201                                       userbuf,                          \
 202                                       count,                            \
 203                                       ppos,                             \
 204                                       print_devstats_##name);           \
 205 }                                                                       \
 206                                                                         \
 207 static const struct file_operations stats_ ##name## _ops = {            \
 208         .read = stats_ ##name## _read,                                  \
 209         .open = mac80211_open_file_generic,                             \
 210 };
 211
 212 #define DEBUGFS_STATS_ADD(name)                                         \
 213         local->debugfs.stats.name = debugfs_create_file(#name, 0400, statsd,\
 214                 local, &stats_ ##name## _ops);
 215
 216 #define DEBUGFS_STATS_DEL(name)                                         \
 217         debugfs_remove(local->debugfs.stats.name);                      \
 218         local->debugfs.stats.name = NULL;
 219
 220 DEBUGFS_STATS_FILE(transmitted_fragment_count, 20, "%u",
 221                    local->dot11TransmittedFragmentCount);
 222 DEBUGFS_STATS_FILE(multicast_transmitted_frame_count, 20, "%u",
 223                    local->dot11MulticastTransmittedFrameCount);
 224 DEBUGFS_STATS_FILE(failed_count, 20, "%u",
 225                    local->dot11FailedCount);
 226 DEBUGFS_STATS_FILE(retry_count, 20, "%u",
 227                    local->dot11RetryCount);
 228 DEBUGFS_STATS_FILE(multiple_retry_count, 20, "%u",
 229                    local->dot11MultipleRetryCount);
 230 DEBUGFS_STATS_FILE(frame_duplicate_count, 20, "%u",
 231                    local->dot11FrameDuplicateCount);
 232 DEBUGFS_STATS_FILE(received_fragment_count, 20, "%u",
 233                    local->dot11ReceivedFragmentCount);
 234 DEBUGFS_STATS_FILE(multicast_received_frame_count, 20, "%u",
 235                    local->dot11MulticastReceivedFrameCount);
 236 DEBUGFS_STATS_FILE(transmitted_frame_count, 20, "%u",
 237                    local->dot11TransmittedFrameCount);
 238 #ifdef CONFIG_MAC80211_DEBUG_COUNTERS
 239 DEBUGFS_STATS_FILE(tx_handlers_drop, 20, "%u",
 240                    local->tx_handlers_drop);
 241 DEBUGFS_STATS_FILE(tx_handlers_queued, 20, "%u",
 242                    local->tx_handlers_queued);
 243 DEBUGFS_STATS_FILE(tx_handlers_drop_unencrypted, 20, "%u",
 244                    local->tx_handlers_drop_unencrypted);
 245 DEBUGFS_STATS_FILE(tx_handlers_drop_fragment, 20, "%u",
 246                    local->tx_handlers_drop_fragment);
 247 DEBUGFS_STATS_FILE(tx_handlers_drop_wep, 20, "%u",
 248                    local->tx_handlers_drop_wep);
 249 DEBUGFS_STATS_FILE(tx_handlers_drop_not_assoc, 20, "%u",
 250                    local->tx_handlers_drop_not_assoc);
 251 DEBUGFS_STATS_FILE(tx_handlers_drop_unauth_port, 20, "%u",
 252                    local->tx_handlers_drop_unauth_port);
 253 DEBUGFS_STATS_FILE(rx_handlers_drop, 20, "%u",
 254                    local->rx_handlers_drop);
 255 DEBUGFS_STATS_FILE(rx_handlers_queued, 20, "%u",
 256                    local->rx_handlers_queued);
 257 DEBUGFS_STATS_FILE(rx_handlers_drop_nullfunc, 20, "%u",
 258                    local->rx_handlers_drop_nullfunc);
 259 DEBUGFS_STATS_FILE(rx_handlers_drop_defrag, 20, "%u",
 260                    local->rx_handlers_drop_defrag);
 261 DEBUGFS_STATS_FILE(rx_handlers_drop_short, 20, "%u",
 262                    local->rx_handlers_drop_short);
 263 DEBUGFS_STATS_FILE(rx_handlers_drop_passive_scan, 20, "%u",
 264                    local->rx_handlers_drop_passive_scan);
 265 DEBUGFS_STATS_FILE(tx_expand_skb_head, 20, "%u",
 266                    local->tx_expand_skb_head);
 267 DEBUGFS_STATS_FILE(tx_expand_skb_head_cloned, 20, "%u",
 268                    local->tx_expand_skb_head_cloned);
 269 DEBUGFS_STATS_FILE(rx_expand_skb_head, 20, "%u",
 270                    local->rx_expand_skb_head);
 271 DEBUGFS_STATS_FILE(rx_expand_skb_head2, 20, "%u",
 272                    local->rx_expand_skb_head2);
 273 DEBUGFS_STATS_FILE(rx_handlers_fragments, 20, "%u",
 274                    local->rx_handlers_fragments);
 275 DEBUGFS_STATS_FILE(tx_status_drop, 20, "%u",
 276                    local->tx_status_drop);
 277
 278 #endif
 279
 280 DEBUGFS_DEVSTATS_FILE(dot11ACKFailureCount);
 281 DEBUGFS_DEVSTATS_FILE(dot11RTSFailureCount);
 282 DEBUGFS_DEVSTATS_FILE(dot11FCSErrorCount);
 283 DEBUGFS_DEVSTATS_FILE(dot11RTSSuccessCount);
 284
 285
 286 void debugfs_hw_add(struct ieee80211_local *local)
 287 {
 288         struct dentry *phyd = local->hw.wiphy->debugfsdir;
 289         struct dentry *statsd;
 290
 291         if (!phyd)
 292                 return;
 293
 294         local->debugfs.stations = debugfs_create_dir("stations", phyd);
 295         local->debugfs.keys = debugfs_create_dir("keys", phyd);
 296
 297         DEBUGFS_ADD(frequency);
 298         DEBUGFS_ADD(total_ps_buffered);
 299         DEBUGFS_ADD(wep_iv);
 300         DEBUGFS_ADD(tsf);
 301         DEBUGFS_ADD_MODE(reset, 0200);
 302         DEBUGFS_ADD(noack);
 303
 304         statsd = debugfs_create_dir("statistics", phyd);
 305         local->debugfs.statistics = statsd;
 306
 307         /* if the dir failed, don't put all the other things into the root! */
 308         if (!statsd)
 309                 return;
 310
 311         DEBUGFS_STATS_ADD(transmitted_fragment_count);
 312         DEBUGFS_STATS_ADD(multicast_transmitted_frame_count);
 313         DEBUGFS_STATS_ADD(failed_count);
 314         DEBUGFS_STATS_ADD(retry_count);
 315         DEBUGFS_STATS_ADD(multiple_retry_count);
 316         DEBUGFS_STATS_ADD(frame_duplicate_count);
 317         DEBUGFS_STATS_ADD(received_fragment_count);
 318         DEBUGFS_STATS_ADD(multicast_received_frame_count);
 319         DEBUGFS_STATS_ADD(transmitted_frame_count);
 320 #ifdef CONFIG_MAC80211_DEBUG_COUNTERS
 321         DEBUGFS_STATS_ADD(tx_handlers_drop);
 322         DEBUGFS_STATS_ADD(tx_handlers_queued);
 323         DEBUGFS_STATS_ADD(tx_handlers_drop_unencrypted);
 324         DEBUGFS_STATS_ADD(tx_handlers_drop_fragment);
 325         DEBUGFS_STATS_ADD(tx_handlers_drop_wep);
 326         DEBUGFS_STATS_ADD(tx_handlers_drop_not_assoc);
 327         DEBUGFS_STATS_ADD(tx_handlers_drop_unauth_port);
 328         DEBUGFS_STATS_ADD(rx_handlers_drop);
 329         DEBUGFS_STATS_ADD(rx_handlers_queued);
 330         DEBUGFS_STATS_ADD(rx_handlers_drop_nullfunc);
 331         DEBUGFS_STATS_ADD(rx_handlers_drop_defrag);
 332         DEBUGFS_STATS_ADD(rx_handlers_drop_short);
 333         DEBUGFS_STATS_ADD(rx_handlers_drop_passive_scan);
 334         DEBUGFS_STATS_ADD(tx_expand_skb_head);
 335         DEBUGFS_STATS_ADD(tx_expand_skb_head_cloned);
 336         DEBUGFS_STATS_ADD(rx_expand_skb_head);
 337         DEBUGFS_STATS_ADD(rx_expand_skb_head2);
 338         DEBUGFS_STATS_ADD(rx_handlers_fragments);
 339         DEBUGFS_STATS_ADD(tx_status_drop);
 340 #endif
 341         DEBUGFS_STATS_ADD(dot11ACKFailureCount);
 342         DEBUGFS_STATS_ADD(dot11RTSFailureCount);
 343         DEBUGFS_STATS_ADD(dot11FCSErrorCount);
 344         DEBUGFS_STATS_ADD(dot11RTSSuccessCount);
 345 }
 346
 347 void debugfs_hw_del(struct ieee80211_local *local)
 348 {
 349         DEBUGFS_DEL(frequency);
 350         DEBUGFS_DEL(total_ps_buffered);
 351         DEBUGFS_DEL(wep_iv);
 352         DEBUGFS_DEL(tsf);
 353         DEBUGFS_DEL(reset);
 354         DEBUGFS_DEL(noack);
 355
 356         DEBUGFS_STATS_DEL(transmitted_fragment_count);
 357         DEBUGFS_STATS_DEL(multicast_transmitted_frame_count);
 358         DEBUGFS_STATS_DEL(failed_count);
 359         DEBUGFS_STATS_DEL(retry_count);
 360         DEBUGFS_STATS_DEL(multiple_retry_count);
 361         DEBUGFS_STATS_DEL(frame_duplicate_count);
 362         DEBUGFS_STATS_DEL(received_fragment_count);
 363         DEBUGFS_STATS_DEL(multicast_received_frame_count);
 364         DEBUGFS_STATS_DEL(transmitted_frame_count);
 365         DEBUGFS_STATS_DEL(num_scans);
 366 #ifdef CONFIG_MAC80211_DEBUG_COUNTERS
 367         DEBUGFS_STATS_DEL(tx_handlers_drop);
 368         DEBUGFS_STATS_DEL(tx_handlers_queued);
 369         DEBUGFS_STATS_DEL(tx_handlers_drop_unencrypted);
 370         DEBUGFS_STATS_DEL(tx_handlers_drop_fragment);
 371         DEBUGFS_STATS_DEL(tx_handlers_drop_wep);
 372         DEBUGFS_STATS_DEL(tx_handlers_drop_not_assoc);
 373         DEBUGFS_STATS_DEL(tx_handlers_drop_unauth_port);
 374         DEBUGFS_STATS_DEL(rx_handlers_drop);
 375         DEBUGFS_STATS_DEL(rx_handlers_queued);
 376         DEBUGFS_STATS_DEL(rx_handlers_drop_nullfunc);
 377         DEBUGFS_STATS_DEL(rx_handlers_drop_defrag);
 378         DEBUGFS_STATS_DEL(rx_handlers_drop_short);
 379         DEBUGFS_STATS_DEL(rx_handlers_drop_passive_scan);
 380         DEBUGFS_STATS_DEL(tx_expand_skb_head);
 381         DEBUGFS_STATS_DEL(tx_expand_skb_head_cloned);
 382         DEBUGFS_STATS_DEL(rx_expand_skb_head);
 383         DEBUGFS_STATS_DEL(rx_expand_skb_head2);
 384         DEBUGFS_STATS_DEL(rx_handlers_fragments);
 385         DEBUGFS_STATS_DEL(tx_status_drop);
 386 #endif
 387         DEBUGFS_STATS_DEL(dot11ACKFailureCount);
 388         DEBUGFS_STATS_DEL(dot11RTSFailureCount);
 389         DEBUGFS_STATS_DEL(dot11FCSErrorCount);
 390         DEBUGFS_STATS_DEL(dot11RTSSuccessCount);
 391
 392         debugfs_remove(local->debugfs.statistics);
 393         local->debugfs.statistics = NULL;
 394         debugfs_remove(local->debugfs.stations);
 395         local->debugfs.stations = NULL;
 396         debugfs_remove(local->debugfs.keys);
 397         local->debugfs.keys = NULL;
 398 }