net/mac80211/debugfs.c

   1
   2 /*
   3  * mac80211 debugfs for wireless PHYs
   4  *
   5  * Copyright 2007       Johannes Berg <johannes@sipsolutions.net>
   6  *
   7  * GPLv2
   8  *
   9  */
  10
  11 #include <linux/debugfs.h>
  12 #include <linux/rtnetlink.h>
  13 #include "ieee80211_i.h"
  14 #include "driver-ops.h"
  15 #include "rate.h"
  16 #include "debugfs.h"
  17
  18 int mac80211_open_file_generic(struct inode *inode, struct file *file)
  19 {
  20         file->private_data = inode->i_private;
  21         return 0;
  22 }
  23
  24 #define DEBUGFS_FORMAT_BUFFER_SIZE 100
  25
  26 int mac80211_format_buffer(char __user *userbuf, size_t count,
  27                                   loff_t *ppos, char *fmt, ...)
  28 {
  29         va_list args;
  30         char buf[DEBUGFS_FORMAT_BUFFER_SIZE];
  31         int res;
  32
  33         va_start(args, fmt);
  34         res = vscnprintf(buf, sizeof(buf), fmt, args);
  35         va_end(args);
  36
  37         return simple_read_from_buffer(userbuf, count, ppos, buf, res);
  38 }
  39
  40 #define DEBUGFS_READONLY_FILE_FN(name, fmt, value...)                   \
  41 static ssize_t name## _read(struct file *file, char __user *userbuf,    \
  42                             size_t count, loff_t *ppos)                 \
  43 {                                                                       \
  44         struct ieee80211_local *local = file->private_data;             \
  45                                                                         \
  46         return mac80211_format_buffer(userbuf, count, ppos,             \
  47                                       fmt "\n", ##value);               \
  48 }
  49
  50 #define DEBUGFS_READONLY_FILE_OPS(name)                 \
  51 static const struct file_operations name## _ops = {                     \
  52         .read = name## _read,                                           \
  53         .open = mac80211_open_file_generic,                             \
  54         .llseek = generic_file_llseek,                                  \
  55 };
  56
  57 #define DEBUGFS_READONLY_FILE(name, fmt, value...)              \
  58         DEBUGFS_READONLY_FILE_FN(name, fmt, value)              \
  59         DEBUGFS_READONLY_FILE_OPS(name)
  60
  61 #define DEBUGFS_ADD(name)                                               \
  62         debugfs_create_file(#name, 0400, phyd, local, &name## _ops);
  63
  64 #define DEBUGFS_ADD_MODE(name, mode)                                    \
  65         debugfs_create_file(#name, mode, phyd, local, &name## _ops);
  66
  67
  68 DEBUGFS_READONLY_FILE(user_power, "%d",
  69                       local->user_power_level);
  70 DEBUGFS_READONLY_FILE(power, "%d",
  71                       local->hw.conf.power_level);
  72 DEBUGFS_READONLY_FILE(frequency, "%d",
  73                       local->hw.conf.channel->center_freq);
  74 DEBUGFS_READONLY_FILE(total_ps_buffered, "%d",
  75                       local->total_ps_buffered);
  76 DEBUGFS_READONLY_FILE(wep_iv, "%#08x",
  77                       local->wep_iv & 0xffffff);
  78 DEBUGFS_READONLY_FILE(rate_ctrl_alg, "%s",
  79         local->rate_ctrl ? local->rate_ctrl->ops->name : "hw/driver");
  80
  81 static ssize_t reset_write(struct file *file, const char __user *user_buf,
  82                            size_t count, loff_t *ppos)
  83 {
  84         struct ieee80211_local *local = file->private_data;
  85
  86         rtnl_lock();
  87         __ieee80211_suspend(&local->hw, NULL);
  88         __ieee80211_resume(&local->hw);
  89         rtnl_unlock();
  90
  91         return count;
  92 }
  93
  94 static const struct file_operations reset_ops = {
  95         .write = reset_write,
  96         .open = mac80211_open_file_generic,
  97         .llseek = noop_llseek,
  98 };
  99
 100 static ssize_t uapsd_queues_read(struct file *file, char __user *user_buf,
 101                                  size_t count, loff_t *ppos)
 102 {
 103         struct ieee80211_local *local = file->private_data;
 104         return mac80211_format_buffer(user_buf, count, ppos, "0x%x\n",
 105                                       local->uapsd_queues);
 106 }
 107
 108 static ssize_t uapsd_queues_write(struct file *file,
 109                                   const char __user *user_buf,
 110                                   size_t count, loff_t *ppos)
 111 {
 112         struct ieee80211_local *local = file->private_data;
 113         u8 val;
 114         int ret;
 115
 116         ret = kstrtou8_from_user(user_buf, count, 0, &val);
 117         if (ret)
 118                 return ret;
 119
 120         if (val & ~IEEE80211_WMM_IE_STA_QOSINFO_AC_MASK)
 121                 return -ERANGE;
 122
 123         local->uapsd_queues = val;
 124
 125         return count;
 126 }
 127
 128 static const struct file_operations uapsd_queues_ops = {
 129         .read = uapsd_queues_read,
 130         .write = uapsd_queues_write,
 131         .open = mac80211_open_file_generic,
 132         .llseek = default_llseek,
 133 };
 134
 135 static ssize_t uapsd_max_sp_len_read(struct file *file, char __user *user_buf,
 136                                      size_t count, loff_t *ppos)
 137 {
 138         struct ieee80211_local *local = file->private_data;
 139
 140         return mac80211_format_buffer(user_buf, count, ppos, "0x%x\n",
 141                                       local->uapsd_max_sp_len);
 142 }
 143
 144 static ssize_t uapsd_max_sp_len_write(struct file *file,
 145                                       const char __user *user_buf,
 146                                       size_t count, loff_t *ppos)
 147 {
 148         struct ieee80211_local *local = file->private_data;
 149         unsigned long val;
 150         char buf[10];
 151         size_t len;
 152         int ret;
 153
 154         len = min(count, sizeof(buf) - 1);
 155         if (copy_from_user(buf, user_buf, len))
 156                 return -EFAULT;
 157         buf[len] = '\0';
 158
 159         ret = kstrtoul(buf, 0, &val);
 160
 161         if (ret)
 162                 return -EINVAL;
 163
 164         if (val & ~IEEE80211_WMM_IE_STA_QOSINFO_SP_MASK)
 165                 return -ERANGE;
 166
 167         local->uapsd_max_sp_len = val;
 168
 169         return count;
 170 }
 171
 172 static const struct file_operations uapsd_max_sp_len_ops = {
 173         .read = uapsd_max_sp_len_read,
 174         .write = uapsd_max_sp_len_write,
 175         .open = mac80211_open_file_generic,
 176         .llseek = default_llseek,
 177 };
 178
 179 static ssize_t channel_type_read(struct file *file, char __user *user_buf,
 180                        size_t count, loff_t *ppos)
 181 {
 182         struct ieee80211_local *local = file->private_data;
 183         const char *buf;
 184
 185         switch (local->hw.conf.channel_type) {
 186         case NL80211_CHAN_NO_HT:
 187                 buf = "no ht\n";
 188                 break;
 189         case NL80211_CHAN_HT20:
 190                 buf = "ht20\n";
 191                 break;
 192         case NL80211_CHAN_HT40MINUS:
 193                 buf = "ht40-\n";
 194                 break;
 195         case NL80211_CHAN_HT40PLUS:
 196                 buf = "ht40+\n";
 197                 break;
 198         default:
 199                 buf = "???";
 200                 break;
 201         }
 202
 203         return simple_read_from_buffer(user_buf, count, ppos, buf, strlen(buf));
 204 }
 205
 206 static ssize_t hwflags_read(struct file *file, char __user *user_buf,
 207                             size_t count, loff_t *ppos)
 208 {
 209         struct ieee80211_local *local = file->private_data;
 210         int mxln = 500;
 211         ssize_t rv;
 212         char *buf = kzalloc(mxln, GFP_KERNEL);
 213         int sf = 0; /* how many written so far */
 214
 215         if (!buf)
 216                 return 0;
 217
 218         sf += snprintf(buf, mxln - sf, "0x%x\n", local->hw.flags);
 219         if (local->hw.flags & IEEE80211_HW_HAS_RATE_CONTROL)
 220                 sf += snprintf(buf + sf, mxln - sf, "HAS_RATE_CONTROL\n");
 221         if (local->hw.flags & IEEE80211_HW_RX_INCLUDES_FCS)
 222                 sf += snprintf(buf + sf, mxln - sf, "RX_INCLUDES_FCS\n");
 223         if (local->hw.flags & IEEE80211_HW_HOST_BROADCAST_PS_BUFFERING)
 224                 sf += snprintf(buf + sf, mxln - sf,
 225                                "HOST_BCAST_PS_BUFFERING\n");
 226         if (local->hw.flags & IEEE80211_HW_2GHZ_SHORT_SLOT_INCAPABLE)
 227                 sf += snprintf(buf + sf, mxln - sf,
 228                                "2GHZ_SHORT_SLOT_INCAPABLE\n");
 229         if (local->hw.flags & IEEE80211_HW_2GHZ_SHORT_PREAMBLE_INCAPABLE)
 230                 sf += snprintf(buf + sf, mxln - sf,
 231                                "2GHZ_SHORT_PREAMBLE_INCAPABLE\n");
 232         if (local->hw.flags & IEEE80211_HW_SIGNAL_UNSPEC)
 233                 sf += snprintf(buf + sf, mxln - sf, "SIGNAL_UNSPEC\n");
 234         if (local->hw.flags & IEEE80211_HW_SIGNAL_DBM)
 235                 sf += snprintf(buf + sf, mxln - sf, "SIGNAL_DBM\n");
 236         if (local->hw.flags & IEEE80211_HW_NEED_DTIM_PERIOD)
 237                 sf += snprintf(buf + sf, mxln - sf, "NEED_DTIM_PERIOD\n");
 238         if (local->hw.flags & IEEE80211_HW_SPECTRUM_MGMT)
 239                 sf += snprintf(buf + sf, mxln - sf, "SPECTRUM_MGMT\n");
 240         if (local->hw.flags & IEEE80211_HW_AMPDU_AGGREGATION)
 241                 sf += snprintf(buf + sf, mxln - sf, "AMPDU_AGGREGATION\n");
 242         if (local->hw.flags & IEEE80211_HW_SUPPORTS_PS)
 243                 sf += snprintf(buf + sf, mxln - sf, "SUPPORTS_PS\n");
 244         if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
 245                 sf += snprintf(buf + sf, mxln - sf, "PS_NULLFUNC_STACK\n");
 246         if (local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_PS)
 247                 sf += snprintf(buf + sf, mxln - sf, "SUPPORTS_DYNAMIC_PS\n");
 248         if (local->hw.flags & IEEE80211_HW_MFP_CAPABLE)
 249                 sf += snprintf(buf + sf, mxln - sf, "MFP_CAPABLE\n");
 250         if (local->hw.flags & IEEE80211_HW_SUPPORTS_STATIC_SMPS)
 251                 sf += snprintf(buf + sf, mxln - sf, "SUPPORTS_STATIC_SMPS\n");
 252         if (local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_SMPS)
 253                 sf += snprintf(buf + sf, mxln - sf, "SUPPORTS_DYNAMIC_SMPS\n");
 254         if (local->hw.flags & IEEE80211_HW_SUPPORTS_UAPSD)
 255                 sf += snprintf(buf + sf, mxln - sf, "SUPPORTS_UAPSD\n");
 256         if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
 257                 sf += snprintf(buf + sf, mxln - sf, "REPORTS_TX_ACK_STATUS\n");
 258         if (local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
 259                 sf += snprintf(buf + sf, mxln - sf, "CONNECTION_MONITOR\n");
 260         if (local->hw.flags & IEEE80211_HW_SUPPORTS_PER_STA_GTK)
 261                 sf += snprintf(buf + sf, mxln - sf, "SUPPORTS_PER_STA_GTK\n");
 262         if (local->hw.flags & IEEE80211_HW_AP_LINK_PS)
 263                 sf += snprintf(buf + sf, mxln - sf, "AP_LINK_PS\n");
 264         if (local->hw.flags & IEEE80211_HW_TX_AMPDU_SETUP_IN_HW)
 265                 sf += snprintf(buf + sf, mxln - sf, "TX_AMPDU_SETUP_IN_HW\n");
 266         if (local->hw.flags & IEEE80211_HW_SCAN_WHILE_IDLE)
 267                 sf += snprintf(buf + sf, mxln - sf, "SCAN_WHILE_IDLE\n");
 268
 269         rv = simple_read_from_buffer(user_buf, count, ppos, buf, strlen(buf));
 270         kfree(buf);
 271         return rv;
 272 }
 273
 274 static ssize_t queues_read(struct file *file, char __user *user_buf,
 275                            size_t count, loff_t *ppos)
 276 {
 277         struct ieee80211_local *local = file->private_data;
 278         unsigned long flags;
 279         char buf[IEEE80211_MAX_QUEUES * 20];
 280         int q, res = 0;
 281
 282         spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
 283         for (q = 0; q < local->hw.queues; q++)
 284                 res += sprintf(buf + res, "%02d: %#.8lx/%d\n", q,
 285                                 local->queue_stop_reasons[q],
 286                                 skb_queue_len(&local->pending[q]));
 287         spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
 288
 289         return simple_read_from_buffer(user_buf, count, ppos, buf, res);
 290 }
 291
 292 DEBUGFS_READONLY_FILE_OPS(hwflags);
 293 DEBUGFS_READONLY_FILE_OPS(channel_type);
 294 DEBUGFS_READONLY_FILE_OPS(queues);
 295
 296 /* statistics stuff */
 297
 298 static ssize_t format_devstat_counter(struct ieee80211_local *local,
 299         char __user *userbuf,
 300         size_t count, loff_t *ppos,
 301         int (*printvalue)(struct ieee80211_low_level_stats *stats, char *buf,
 302                           int buflen))
 303 {
 304         struct ieee80211_low_level_stats stats;
 305         char buf[20];
 306         int res;
 307
 308         rtnl_lock();
 309         res = drv_get_stats(local, &stats);
 310         rtnl_unlock();
 311         if (res)
 312                 return res;
 313         res = printvalue(&stats, buf, sizeof(buf));
 314         return simple_read_from_buffer(userbuf, count, ppos, buf, res);
 315 }
 316
 317 #define DEBUGFS_DEVSTATS_FILE(name)                                     \
 318 static int print_devstats_##name(struct ieee80211_low_level_stats *stats,\
 319                                  char *buf, int buflen)                 \
 320 {                                                                       \
 321         return scnprintf(buf, buflen, "%u\n", stats->name);             \
 322 }                                                                       \
 323 static ssize_t stats_ ##name## _read(struct file *file,                 \
 324                                      char __user *userbuf,              \
 325                                      size_t count, loff_t *ppos)        \
 326 {                                                                       \
 327         return format_devstat_counter(file->private_data,               \
 328                                       userbuf,                          \
 329                                       count,                            \
 330                                       ppos,                             \
 331                                       print_devstats_##name);           \
 332 }                                                                       \
 333                                                                         \
 334 static const struct file_operations stats_ ##name## _ops = {            \
 335         .read = stats_ ##name## _read,                                  \
 336         .open = mac80211_open_file_generic,                             \
 337         .llseek = generic_file_llseek,                                  \
 338 };
 339
 340 #define DEBUGFS_STATS_ADD(name, field)                                  \
 341         debugfs_create_u32(#name, 0400, statsd, (u32 *) &field);
 342 #define DEBUGFS_DEVSTATS_ADD(name)                                      \
 343         debugfs_create_file(#name, 0400, statsd, local, &stats_ ##name## _ops);
 344
 345 DEBUGFS_DEVSTATS_FILE(dot11ACKFailureCount);
 346 DEBUGFS_DEVSTATS_FILE(dot11RTSFailureCount);
 347 DEBUGFS_DEVSTATS_FILE(dot11FCSErrorCount);
 348 DEBUGFS_DEVSTATS_FILE(dot11RTSSuccessCount);
 349
 350 void debugfs_hw_add(struct ieee80211_local *local)
 351 {
 352         struct dentry *phyd = local->hw.wiphy->debugfsdir;
 353         struct dentry *statsd;
 354
 355         if (!phyd)
 356                 return;
 357
 358         local->debugfs.keys = debugfs_create_dir("keys", phyd);
 359
 360         DEBUGFS_ADD(frequency);
 361         DEBUGFS_ADD(total_ps_buffered);
 362         DEBUGFS_ADD(wep_iv);
 363         DEBUGFS_ADD(queues);
 364         DEBUGFS_ADD_MODE(reset, 0200);
 365         DEBUGFS_ADD(uapsd_queues);
 366         DEBUGFS_ADD(uapsd_max_sp_len);
 367         DEBUGFS_ADD(channel_type);
 368         DEBUGFS_ADD(hwflags);
 369         DEBUGFS_ADD(user_power);
 370         DEBUGFS_ADD(power);
 371
 372         statsd = debugfs_create_dir("statistics", phyd);
 373
 374         /* if the dir failed, don't put all the other things into the root! */
 375         if (!statsd)
 376                 return;
 377
 378         DEBUGFS_STATS_ADD(transmitted_fragment_count,
 379                 local->dot11TransmittedFragmentCount);
 380         DEBUGFS_STATS_ADD(multicast_transmitted_frame_count,
 381                 local->dot11MulticastTransmittedFrameCount);
 382         DEBUGFS_STATS_ADD(failed_count, local->dot11FailedCount);
 383         DEBUGFS_STATS_ADD(retry_count, local->dot11RetryCount);
 384         DEBUGFS_STATS_ADD(multiple_retry_count,
 385                 local->dot11MultipleRetryCount);
 386         DEBUGFS_STATS_ADD(frame_duplicate_count,
 387                 local->dot11FrameDuplicateCount);
 388         DEBUGFS_STATS_ADD(received_fragment_count,
 389                 local->dot11ReceivedFragmentCount);
 390         DEBUGFS_STATS_ADD(multicast_received_frame_count,
 391                 local->dot11MulticastReceivedFrameCount);
 392         DEBUGFS_STATS_ADD(transmitted_frame_count,
 393                 local->dot11TransmittedFrameCount);
 394 #ifdef CONFIG_MAC80211_DEBUG_COUNTERS
 395         DEBUGFS_STATS_ADD(tx_handlers_drop, local->tx_handlers_drop);
 396         DEBUGFS_STATS_ADD(tx_handlers_queued, local->tx_handlers_queued);
 397         DEBUGFS_STATS_ADD(tx_handlers_drop_unencrypted,
 398                 local->tx_handlers_drop_unencrypted);
 399         DEBUGFS_STATS_ADD(tx_handlers_drop_fragment,
 400                 local->tx_handlers_drop_fragment);
 401         DEBUGFS_STATS_ADD(tx_handlers_drop_wep,
 402                 local->tx_handlers_drop_wep);
 403         DEBUGFS_STATS_ADD(tx_handlers_drop_not_assoc,
 404                 local->tx_handlers_drop_not_assoc);
 405         DEBUGFS_STATS_ADD(tx_handlers_drop_unauth_port,
 406                 local->tx_handlers_drop_unauth_port);
 407         DEBUGFS_STATS_ADD(rx_handlers_drop, local->rx_handlers_drop);
 408         DEBUGFS_STATS_ADD(rx_handlers_queued, local->rx_handlers_queued);
 409         DEBUGFS_STATS_ADD(rx_handlers_drop_nullfunc,
 410                 local->rx_handlers_drop_nullfunc);
 411         DEBUGFS_STATS_ADD(rx_handlers_drop_defrag,
 412                 local->rx_handlers_drop_defrag);
 413         DEBUGFS_STATS_ADD(rx_handlers_drop_short,
 414                 local->rx_handlers_drop_short);
 415         DEBUGFS_STATS_ADD(rx_handlers_drop_passive_scan,
 416                 local->rx_handlers_drop_passive_scan);
 417         DEBUGFS_STATS_ADD(tx_expand_skb_head,
 418                 local->tx_expand_skb_head);
 419         DEBUGFS_STATS_ADD(tx_expand_skb_head_cloned,
 420                 local->tx_expand_skb_head_cloned);
 421         DEBUGFS_STATS_ADD(rx_expand_skb_head,
 422                 local->rx_expand_skb_head);
 423         DEBUGFS_STATS_ADD(rx_expand_skb_head2,
 424                 local->rx_expand_skb_head2);
 425         DEBUGFS_STATS_ADD(rx_handlers_fragments,
 426                 local->rx_handlers_fragments);
 427         DEBUGFS_STATS_ADD(tx_status_drop,
 428                 local->tx_status_drop);
 429 #endif
 430         DEBUGFS_DEVSTATS_ADD(dot11ACKFailureCount);
 431         DEBUGFS_DEVSTATS_ADD(dot11RTSFailureCount);
 432         DEBUGFS_DEVSTATS_ADD(dot11FCSErrorCount);
 433         DEBUGFS_DEVSTATS_ADD(dot11RTSSuccessCount);
 434 }