net/mac80211/debugfs_sta.c

   1 /*
   2  * Copyright 2003-2005  Devicescape Software, Inc.
   3  * Copyright (c) 2006   Jiri Benc <jbenc@suse.cz>
   4  * Copyright 2007       Johannes Berg <johannes@sipsolutions.net>
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License version 2 as
   8  * published by the Free Software Foundation.
   9  */
  10
  11 #include <linux/debugfs.h>
  12 #include <linux/ieee80211.h>
  13 #include "ieee80211_i.h"
  14 #include "debugfs.h"
  15 #include "debugfs_sta.h"
  16 #include "sta_info.h"
  17 #include "driver-ops.h"
  18
  19 /* sta attributtes */
  20
  21 #define STA_READ(name, field, format_string)                            \
  22 static ssize_t sta_ ##name## _read(struct file *file,                   \
  23                                    char __user *userbuf,                \
  24                                    size_t count, loff_t *ppos)          \
  25 {                                                                       \
  26         struct sta_info *sta = file->private_data;                      \
  27         return mac80211_format_buffer(userbuf, count, ppos,             \
  28                                       format_string, sta->field);       \
  29 }
  30 #define STA_READ_D(name, field) STA_READ(name, field, "%d\n")
  31 #define STA_READ_U(name, field) STA_READ(name, field, "%u\n")
  32 #define STA_READ_S(name, field) STA_READ(name, field, "%s\n")
  33
  34 #define STA_OPS(name)                                                   \
  35 static const struct file_operations sta_ ##name## _ops = {              \
  36         .read = sta_##name##_read,                                      \
  37         .open = simple_open,                                            \
  38         .llseek = generic_file_llseek,                                  \
  39 }
  40
  41 #define STA_OPS_W(name)                                                 \
  42 static const struct file_operations sta_ ##name## _ops = {              \
  43         .write = sta_##name##_write,                                    \
  44         .open = simple_open,                                            \
  45         .llseek = generic_file_llseek,                                  \
  46 }
  47
  48 #define STA_OPS_RW(name)                                                \
  49 static const struct file_operations sta_ ##name## _ops = {              \
  50         .read = sta_##name##_read,                                      \
  51         .write = sta_##name##_write,                                    \
  52         .open = simple_open,                                            \
  53         .llseek = generic_file_llseek,                                  \
  54 }
  55
  56 #define STA_FILE(name, field, format)                                   \
  57                 STA_READ_##format(name, field)                          \
  58                 STA_OPS(name)
  59
  60 STA_FILE(aid, sta.aid, D);
  61 STA_FILE(dev, sdata->name, S);
  62 STA_FILE(last_signal, last_signal, D);
  63 STA_FILE(last_ack_signal, last_ack_signal, D);
  64 STA_FILE(beacon_loss_count, beacon_loss_count, D);
  65
  66 static ssize_t sta_flags_read(struct file *file, char __user *userbuf,
  67                               size_t count, loff_t *ppos)
  68 {
  69         char buf[121];
  70         struct sta_info *sta = file->private_data;
  71
  72 #define TEST(flg) \
  73         test_sta_flag(sta, WLAN_STA_##flg) ? #flg "\n" : ""
  74
  75         int res = scnprintf(buf, sizeof(buf),
  76                             "%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s",
  77                             TEST(AUTH), TEST(ASSOC), TEST(PS_STA),
  78                             TEST(PS_DRIVER), TEST(AUTHORIZED),
  79                             TEST(SHORT_PREAMBLE),
  80                             TEST(WME), TEST(WDS), TEST(CLEAR_PS_FILT),
  81                             TEST(MFP), TEST(BLOCK_BA), TEST(PSPOLL),
  82                             TEST(UAPSD), TEST(SP), TEST(TDLS_PEER),
  83                             TEST(TDLS_PEER_AUTH), TEST(4ADDR_EVENT),
  84                             TEST(INSERTED), TEST(RATE_CONTROL),
  85                             TEST(TOFFSET_KNOWN), TEST(MPSP_OWNER),
  86                             TEST(MPSP_RECIPIENT));
  87 #undef TEST
  88         return simple_read_from_buffer(userbuf, count, ppos, buf, res);
  89 }
  90 STA_OPS(flags);
  91
  92 static ssize_t sta_num_ps_buf_frames_read(struct file *file,
  93                                           char __user *userbuf,
  94                                           size_t count, loff_t *ppos)
  95 {
  96         struct sta_info *sta = file->private_data;
  97         char buf[17*IEEE80211_NUM_ACS], *p = buf;
  98         int ac;
  99
 100         for (ac = 0; ac < IEEE80211_NUM_ACS; ac++)
 101                 p += scnprintf(p, sizeof(buf)+buf-p, "AC%d: %d\n", ac,
 102                                skb_queue_len(&sta->ps_tx_buf[ac]) +
 103                                skb_queue_len(&sta->tx_filtered[ac]));
 104         return simple_read_from_buffer(userbuf, count, ppos, buf, p - buf);
 105 }
 106 STA_OPS(num_ps_buf_frames);
 107
 108 static ssize_t sta_inactive_ms_read(struct file *file, char __user *userbuf,
 109                                     size_t count, loff_t *ppos)
 110 {
 111         struct sta_info *sta = file->private_data;
 112         return mac80211_format_buffer(userbuf, count, ppos, "%d\n",
 113                                       jiffies_to_msecs(jiffies - sta->last_rx));
 114 }
 115 STA_OPS(inactive_ms);
 116
 117
 118 static ssize_t sta_connected_time_read(struct file *file, char __user *userbuf,
 119                                         size_t count, loff_t *ppos)
 120 {
 121         struct sta_info *sta = file->private_data;
 122         struct timespec uptime;
 123         struct tm result;
 124         long connected_time_secs;
 125         char buf[100];
 126         int res;
 127         ktime_get_ts(&uptime);
 128         connected_time_secs = uptime.tv_sec - sta->last_connected;
 129         time_to_tm(connected_time_secs, 0, &result);
 130         result.tm_year -= 70;
 131         result.tm_mday -= 1;
 132         res = scnprintf(buf, sizeof(buf),
 133                 "years  - %ld\nmonths - %d\ndays   - %d\nclock  - %d:%d:%d\n\n",
 134                         result.tm_year, result.tm_mon, result.tm_mday,
 135                         result.tm_hour, result.tm_min, result.tm_sec);
 136         return simple_read_from_buffer(userbuf, count, ppos, buf, res);
 137 }
 138 STA_OPS(connected_time);
 139
 140
 141
 142 static ssize_t sta_last_seq_ctrl_read(struct file *file, char __user *userbuf,
 143                                       size_t count, loff_t *ppos)
 144 {
 145         char buf[15*IEEE80211_NUM_TIDS], *p = buf;
 146         int i;
 147         struct sta_info *sta = file->private_data;
 148         for (i = 0; i < IEEE80211_NUM_TIDS; i++)
 149                 p += scnprintf(p, sizeof(buf)+buf-p, "%x ",
 150                                le16_to_cpu(sta->last_seq_ctrl[i]));
 151         p += scnprintf(p, sizeof(buf)+buf-p, "\n");
 152         return simple_read_from_buffer(userbuf, count, ppos, buf, p - buf);
 153 }
 154 STA_OPS(last_seq_ctrl);
 155
 156 static ssize_t sta_agg_status_read(struct file *file, char __user *userbuf,
 157                                         size_t count, loff_t *ppos)
 158 {
 159         char buf[71 + IEEE80211_NUM_TIDS * 40], *p = buf;
 160         int i;
 161         struct sta_info *sta = file->private_data;
 162         struct tid_ampdu_rx *tid_rx;
 163         struct tid_ampdu_tx *tid_tx;
 164
 165         rcu_read_lock();
 166
 167         p += scnprintf(p, sizeof(buf) + buf - p, "next dialog_token: %#02x\n",
 168                         sta->ampdu_mlme.dialog_token_allocator + 1);
 169         p += scnprintf(p, sizeof(buf) + buf - p,
 170                        "TID\t\tRX active\tDTKN\tSSN\t\tTX\tDTKN\tpending\n");
 171
 172         for (i = 0; i < IEEE80211_NUM_TIDS; i++) {
 173                 tid_rx = rcu_dereference(sta->ampdu_mlme.tid_rx[i]);
 174                 tid_tx = rcu_dereference(sta->ampdu_mlme.tid_tx[i]);
 175
 176                 p += scnprintf(p, sizeof(buf) + buf - p, "%02d", i);
 177                 p += scnprintf(p, sizeof(buf) + buf - p, "\t\t%x", !!tid_rx);
 178                 p += scnprintf(p, sizeof(buf) + buf - p, "\t%#.2x",
 179                                 tid_rx ? tid_rx->dialog_token : 0);
 180                 p += scnprintf(p, sizeof(buf) + buf - p, "\t%#.3x",
 181                                 tid_rx ? tid_rx->ssn : 0);
 182
 183                 p += scnprintf(p, sizeof(buf) + buf - p, "\t\t%x", !!tid_tx);
 184                 p += scnprintf(p, sizeof(buf) + buf - p, "\t%#.2x",
 185                                 tid_tx ? tid_tx->dialog_token : 0);
 186                 p += scnprintf(p, sizeof(buf) + buf - p, "\t%03d",
 187                                 tid_tx ? skb_queue_len(&tid_tx->pending) : 0);
 188                 p += scnprintf(p, sizeof(buf) + buf - p, "\n");
 189         }
 190         rcu_read_unlock();
 191
 192         return simple_read_from_buffer(userbuf, count, ppos, buf, p - buf);
 193 }
 194
 195 static ssize_t sta_agg_status_write(struct file *file, const char __user *userbuf,
 196                                     size_t count, loff_t *ppos)
 197 {
 198         char _buf[12] = {}, *buf = _buf;
 199         struct sta_info *sta = file->private_data;
 200         bool start, tx;
 201         unsigned long tid;
 202         int ret;
 203
 204         if (count > sizeof(_buf))
 205                 return -EINVAL;
 206
 207         if (copy_from_user(buf, userbuf, count))
 208                 return -EFAULT;
 209
 210         buf[sizeof(_buf) - 1] = '\0';
 211
 212         if (strncmp(buf, "tx ", 3) == 0) {
 213                 buf += 3;
 214                 tx = true;
 215         } else if (strncmp(buf, "rx ", 3) == 0) {
 216                 buf += 3;
 217                 tx = false;
 218         } else
 219                 return -EINVAL;
 220
 221         if (strncmp(buf, "start ", 6) == 0) {
 222                 buf += 6;
 223                 start = true;
 224                 if (!tx)
 225                         return -EINVAL;
 226         } else if (strncmp(buf, "stop ", 5) == 0) {
 227                 buf += 5;
 228                 start = false;
 229         } else
 230                 return -EINVAL;
 231
 232         ret = kstrtoul(buf, 0, &tid);
 233         if (ret)
 234                 return ret;
 235
 236         if (tid >= IEEE80211_NUM_TIDS)
 237                 return -EINVAL;
 238
 239         if (tx) {
 240                 if (start)
 241                         ret = ieee80211_start_tx_ba_session(&sta->sta, tid, 5000);
 242                 else
 243                         ret = ieee80211_stop_tx_ba_session(&sta->sta, tid);
 244         } else {
 245                 __ieee80211_stop_rx_ba_session(sta, tid, WLAN_BACK_RECIPIENT,
 246                                                3, true);
 247                 ret = 0;
 248         }
 249
 250         return ret ?: count;
 251 }
 252 STA_OPS_RW(agg_status);
 253
 254 static ssize_t sta_ht_capa_read(struct file *file, char __user *userbuf,
 255                                 size_t count, loff_t *ppos)
 256 {
 257 #define PRINT_HT_CAP(_cond, _str) \
 258         do { \
 259         if (_cond) \
 260                         p += scnprintf(p, sizeof(buf)+buf-p, "\t" _str "\n"); \
 261         } while (0)
 262         char buf[512], *p = buf;
 263         int i;
 264         struct sta_info *sta = file->private_data;
 265         struct ieee80211_sta_ht_cap *htc = &sta->sta.ht_cap;
 266
 267         p += scnprintf(p, sizeof(buf) + buf - p, "ht %ssupported\n",
 268                         htc->ht_supported ? "" : "not ");
 269         if (htc->ht_supported) {
 270                 p += scnprintf(p, sizeof(buf)+buf-p, "cap: %#.4x\n", htc->cap);
 271
 272                 PRINT_HT_CAP((htc->cap & BIT(0)), "RX LDPC");
 273                 PRINT_HT_CAP((htc->cap & BIT(1)), "HT20/HT40");
 274                 PRINT_HT_CAP(!(htc->cap & BIT(1)), "HT20");
 275
 276                 PRINT_HT_CAP(((htc->cap >> 2) & 0x3) == 0, "Static SM Power Save");
 277                 PRINT_HT_CAP(((htc->cap >> 2) & 0x3) == 1, "Dynamic SM Power Save");
 278                 PRINT_HT_CAP(((htc->cap >> 2) & 0x3) == 3, "SM Power Save disabled");
 279
 280                 PRINT_HT_CAP((htc->cap & BIT(4)), "RX Greenfield");
 281                 PRINT_HT_CAP((htc->cap & BIT(5)), "RX HT20 SGI");
 282                 PRINT_HT_CAP((htc->cap & BIT(6)), "RX HT40 SGI");
 283                 PRINT_HT_CAP((htc->cap & BIT(7)), "TX STBC");
 284
 285                 PRINT_HT_CAP(((htc->cap >> 8) & 0x3) == 0, "No RX STBC");
 286                 PRINT_HT_CAP(((htc->cap >> 8) & 0x3) == 1, "RX STBC 1-stream");
 287                 PRINT_HT_CAP(((htc->cap >> 8) & 0x3) == 2, "RX STBC 2-streams");
 288                 PRINT_HT_CAP(((htc->cap >> 8) & 0x3) == 3, "RX STBC 3-streams");
 289
 290                 PRINT_HT_CAP((htc->cap & BIT(10)), "HT Delayed Block Ack");
 291
 292                 PRINT_HT_CAP(!(htc->cap & BIT(11)), "Max AMSDU length: "
 293                              "3839 bytes");
 294                 PRINT_HT_CAP((htc->cap & BIT(11)), "Max AMSDU length: "
 295                              "7935 bytes");
 296
 297                 /*
 298                  * For beacons and probe response this would mean the BSS
 299                  * does or does not allow the usage of DSSS/CCK HT40.
 300                  * Otherwise it means the STA does or does not use
 301                  * DSSS/CCK HT40.
 302                  */
 303                 PRINT_HT_CAP((htc->cap & BIT(12)), "DSSS/CCK HT40");
 304                 PRINT_HT_CAP(!(htc->cap & BIT(12)), "No DSSS/CCK HT40");
 305
 306                 /* BIT(13) is reserved */
 307
 308                 PRINT_HT_CAP((htc->cap & BIT(14)), "40 MHz Intolerant");
 309
 310                 PRINT_HT_CAP((htc->cap & BIT(15)), "L-SIG TXOP protection");
 311
 312                 p += scnprintf(p, sizeof(buf)+buf-p, "ampdu factor/density: %d/%d\n",
 313                                 htc->ampdu_factor, htc->ampdu_density);
 314                 p += scnprintf(p, sizeof(buf)+buf-p, "MCS mask:");
 315
 316                 for (i = 0; i < IEEE80211_HT_MCS_MASK_LEN; i++)
 317                         p += scnprintf(p, sizeof(buf)+buf-p, " %.2x",
 318                                         htc->mcs.rx_mask[i]);
 319                 p += scnprintf(p, sizeof(buf)+buf-p, "\n");
 320
 321                 /* If not set this is meaningless */
 322                 if (le16_to_cpu(htc->mcs.rx_highest)) {
 323                         p += scnprintf(p, sizeof(buf)+buf-p,
 324                                        "MCS rx highest: %d Mbps\n",
 325                                        le16_to_cpu(htc->mcs.rx_highest));
 326                 }
 327
 328                 p += scnprintf(p, sizeof(buf)+buf-p, "MCS tx params: %x\n",
 329                                 htc->mcs.tx_params);
 330         }
 331
 332         return simple_read_from_buffer(userbuf, count, ppos, buf, p - buf);
 333 }
 334 STA_OPS(ht_capa);
 335
 336 static ssize_t sta_vht_capa_read(struct file *file, char __user *userbuf,
 337                                  size_t count, loff_t *ppos)
 338 {
 339         char buf[128], *p = buf;
 340         struct sta_info *sta = file->private_data;
 341         struct ieee80211_sta_vht_cap *vhtc = &sta->sta.vht_cap;
 342
 343         p += scnprintf(p, sizeof(buf) + buf - p, "VHT %ssupported\n",
 344                         vhtc->vht_supported ? "" : "not ");
 345         if (vhtc->vht_supported) {
 346                 p += scnprintf(p, sizeof(buf)+buf-p, "cap: %#.8x\n", vhtc->cap);
 347
 348                 p += scnprintf(p, sizeof(buf)+buf-p, "RX MCS: %.4x\n",
 349                                le16_to_cpu(vhtc->vht_mcs.rx_mcs_map));
 350                 if (vhtc->vht_mcs.rx_highest)
 351                         p += scnprintf(p, sizeof(buf)+buf-p,
 352                                        "MCS RX highest: %d Mbps\n",
 353                                        le16_to_cpu(vhtc->vht_mcs.rx_highest));
 354                 p += scnprintf(p, sizeof(buf)+buf-p, "TX MCS: %.4x\n",
 355                                le16_to_cpu(vhtc->vht_mcs.tx_mcs_map));
 356                 if (vhtc->vht_mcs.tx_highest)
 357                         p += scnprintf(p, sizeof(buf)+buf-p,
 358                                        "MCS TX highest: %d Mbps\n",
 359                                        le16_to_cpu(vhtc->vht_mcs.tx_highest));
 360         }
 361
 362         return simple_read_from_buffer(userbuf, count, ppos, buf, p - buf);
 363 }
 364 STA_OPS(vht_capa);
 365
 366 static ssize_t sta_current_tx_rate_read(struct file *file, char __user *userbuf,
 367                                         size_t count, loff_t *ppos)
 368 {
 369         struct sta_info *sta = file->private_data;
 370         struct rate_info rinfo;
 371         u16 rate;
 372         sta_set_rate_info_tx(sta, &sta->last_tx_rate, &rinfo);
 373         rate = cfg80211_calculate_bitrate(&rinfo);
 374
 375         return mac80211_format_buffer(userbuf, count, ppos,
 376                                       "%d.%d MBit/s\n",
 377                                       rate/10, rate%10);
 378 }
 379 STA_OPS(current_tx_rate);
 380
 381 static ssize_t sta_last_rx_rate_read(struct file *file, char __user *userbuf,
 382                                      size_t count, loff_t *ppos)
 383 {
 384         struct sta_info *sta = file->private_data;
 385         struct rate_info rinfo;
 386         u16 rate;
 387
 388         sta_set_rate_info_rx(sta, &rinfo);
 389
 390         rate = cfg80211_calculate_bitrate(&rinfo);
 391
 392         return mac80211_format_buffer(userbuf, count, ppos,
 393                                       "%d.%d MBit/s\n",
 394                                       rate/10, rate%10);
 395 }
 396 STA_OPS(last_rx_rate);
 397
 398 static int
 399 sta_tx_latency_stat_header(struct ieee80211_tx_latency_bin_ranges *tx_latency,
 400                            char *buf, int pos, int bufsz)
 401 {
 402         int i;
 403         int range_count = tx_latency->n_ranges;
 404         u32 *bin_ranges = tx_latency->ranges;
 405
 406         pos += scnprintf(buf + pos, bufsz - pos,
 407                           "Station\t\t\tTID\tMax\tAvg");
 408         if (range_count) {
 409                 pos += scnprintf(buf + pos, bufsz - pos,
 410                                   "\t<=%d", bin_ranges[0]);
 411                 for (i = 0; i < range_count - 1; i++)
 412                         pos += scnprintf(buf + pos, bufsz - pos, "\t%d-%d",
 413                                           bin_ranges[i], bin_ranges[i+1]);
 414                 pos += scnprintf(buf + pos, bufsz - pos,
 415                                   "\t%d<", bin_ranges[range_count - 1]);
 416         }
 417
 418         pos += scnprintf(buf + pos, bufsz - pos, "\n");
 419
 420         return pos;
 421 }
 422
 423 static int
 424 sta_tx_latency_stat_table(struct ieee80211_tx_latency_bin_ranges *tx_lat_range,
 425                           struct ieee80211_tx_latency_stat *tx_lat,
 426                           char *buf, int pos, int bufsz, int tid)
 427 {
 428         u32 avg = 0;
 429         int j;
 430         int bin_count = tx_lat->bin_count;
 431
 432         pos += scnprintf(buf + pos, bufsz - pos, "\t\t\t%d", tid);
 433         /* make sure you don't divide in 0 */
 434         if (tx_lat->counter)
 435                 avg = tx_lat->sum / tx_lat->counter;
 436
 437         pos += scnprintf(buf + pos, bufsz - pos, "\t%d\t%d",
 438                           tx_lat->max, avg);
 439
 440         if (tx_lat_range->n_ranges && tx_lat->bins)
 441                 for (j = 0; j < bin_count; j++)
 442                         pos += scnprintf(buf + pos, bufsz - pos,
 443                                           "\t%d", tx_lat->bins[j]);
 444         pos += scnprintf(buf + pos, bufsz - pos, "\n");
 445
 446         return pos;
 447 }
 448
 449 /*
 450  * Output Tx latency statistics station && restart all statistics information
 451  */
 452 static ssize_t sta_tx_latency_stat_read(struct file *file,
 453                                         char __user *userbuf,
 454                                         size_t count, loff_t *ppos)
 455 {
 456         struct sta_info *sta = file->private_data;
 457         struct ieee80211_local *local = sta->local;
 458         struct ieee80211_tx_latency_bin_ranges *tx_latency;
 459         char *buf;
 460         int bufsz, ret, i;
 461         int pos = 0;
 462
 463         bufsz = 20 * IEEE80211_NUM_TIDS *
 464                 sizeof(struct ieee80211_tx_latency_stat);
 465         buf = kzalloc(bufsz, GFP_KERNEL);
 466         if (!buf)
 467                 return -ENOMEM;
 468
 469         rcu_read_lock();
 470
 471         tx_latency = rcu_dereference(local->tx_latency);
 472
 473         if (!sta->tx_lat) {
 474                 pos += scnprintf(buf + pos, bufsz - pos,
 475                                  "Tx latency statistics are not enabled\n");
 476                 goto unlock;
 477         }
 478
 479         pos = sta_tx_latency_stat_header(tx_latency, buf, pos, bufsz);
 480
 481         pos += scnprintf(buf + pos, bufsz - pos, "%pM\n", sta->sta.addr);
 482         for (i = 0; i < IEEE80211_NUM_TIDS; i++)
 483                 pos = sta_tx_latency_stat_table(tx_latency, &sta->tx_lat[i],
 484                                                 buf, pos, bufsz, i);
 485 unlock:
 486         rcu_read_unlock();
 487
 488         ret = simple_read_from_buffer(userbuf, count, ppos, buf, pos);
 489         kfree(buf);
 490
 491         return ret;
 492 }
 493 STA_OPS(tx_latency_stat);
 494
 495 static ssize_t sta_tx_latency_stat_reset_write(struct file *file,
 496                                                const char __user *userbuf,
 497                                                size_t count, loff_t *ppos)
 498 {
 499         u32 *bins;
 500         int bin_count;
 501         struct sta_info *sta = file->private_data;
 502         int i;
 503
 504         if (!sta->tx_lat)
 505                 return -EINVAL;
 506
 507         for (i = 0; i < IEEE80211_NUM_TIDS; i++) {
 508                 bins = sta->tx_lat[i].bins;
 509                 bin_count = sta->tx_lat[i].bin_count;
 510
 511                 sta->tx_lat[i].max = 0;
 512                 sta->tx_lat[i].sum = 0;
 513                 sta->tx_lat[i].counter = 0;
 514
 515                 if (bin_count)
 516                         memset(bins, 0, bin_count * sizeof(u32));
 517         }
 518
 519         return count;
 520 }
 521 STA_OPS_W(tx_latency_stat_reset);
 522
 523 #define DEBUGFS_ADD(name) \
 524         debugfs_create_file(#name, 0400, \
 525                 sta->debugfs.dir, sta, &sta_ ##name## _ops);
 526
 527 #define DEBUGFS_ADD_COUNTER(name, field)                                \
 528         if (sizeof(sta->field) == sizeof(u32))                          \
 529                 debugfs_create_u32(#name, 0400, sta->debugfs.dir,       \
 530                         (u32 *) &sta->field);                           \
 531         else                                                            \
 532                 debugfs_create_u64(#name, 0400, sta->debugfs.dir,       \
 533                         (u64 *) &sta->field);
 534
 535 void ieee80211_sta_debugfs_add(struct sta_info *sta)
 536 {
 537         struct ieee80211_local *local = sta->local;
 538         struct ieee80211_sub_if_data *sdata = sta->sdata;
 539         struct dentry *stations_dir = sta->sdata->debugfs.subdir_stations;
 540         u8 mac[3*ETH_ALEN];
 541
 542         sta->debugfs.add_has_run = true;
 543
 544         if (!stations_dir)
 545                 return;
 546
 547         snprintf(mac, sizeof(mac), "%pM", sta->sta.addr);
 548
 549         /*
 550          * This might fail due to a race condition:
 551          * When mac80211 unlinks a station, the debugfs entries
 552          * remain, but it is already possible to link a new
 553          * station with the same address which triggers adding
 554          * it to debugfs; therefore, if the old station isn't
 555          * destroyed quickly enough the old station's debugfs
 556          * dir might still be around.
 557          */
 558         sta->debugfs.dir = debugfs_create_dir(mac, stations_dir);
 559         if (!sta->debugfs.dir)
 560                 return;
 561
 562         DEBUGFS_ADD(flags);
 563         DEBUGFS_ADD(num_ps_buf_frames);
 564         DEBUGFS_ADD(inactive_ms);
 565         DEBUGFS_ADD(connected_time);
 566         DEBUGFS_ADD(last_seq_ctrl);
 567         DEBUGFS_ADD(agg_status);
 568         DEBUGFS_ADD(dev);
 569         DEBUGFS_ADD(last_signal);
 570         DEBUGFS_ADD(beacon_loss_count);
 571         DEBUGFS_ADD(ht_capa);
 572         DEBUGFS_ADD(vht_capa);
 573         DEBUGFS_ADD(last_ack_signal);
 574         DEBUGFS_ADD(current_tx_rate);
 575         DEBUGFS_ADD(last_rx_rate);
 576         DEBUGFS_ADD(tx_latency_stat);
 577         DEBUGFS_ADD(tx_latency_stat_reset);
 578
 579         DEBUGFS_ADD_COUNTER(rx_packets, rx_packets);
 580         DEBUGFS_ADD_COUNTER(tx_packets, tx_packets);
 581         DEBUGFS_ADD_COUNTER(rx_bytes, rx_bytes);
 582         DEBUGFS_ADD_COUNTER(tx_bytes, tx_bytes);
 583         DEBUGFS_ADD_COUNTER(rx_duplicates, num_duplicates);
 584         DEBUGFS_ADD_COUNTER(rx_fragments, rx_fragments);
 585         DEBUGFS_ADD_COUNTER(rx_dropped, rx_dropped);
 586         DEBUGFS_ADD_COUNTER(tx_fragments, tx_fragments);
 587         DEBUGFS_ADD_COUNTER(tx_filtered, tx_filtered_count);
 588         DEBUGFS_ADD_COUNTER(tx_retry_failed, tx_retry_failed);
 589         DEBUGFS_ADD_COUNTER(tx_retry_count, tx_retry_count);
 590
 591         if (sizeof(sta->driver_buffered_tids) == sizeof(u32))
 592                 debugfs_create_x32("driver_buffered_tids", 0400,
 593                                    sta->debugfs.dir,
 594                                    (u32 *)&sta->driver_buffered_tids);
 595         else
 596                 debugfs_create_x64("driver_buffered_tids", 0400,
 597                                    sta->debugfs.dir,
 598                                    (u64 *)&sta->driver_buffered_tids);
 599
 600         drv_sta_add_debugfs(local, sdata, &sta->sta, sta->debugfs.dir);
 601 }
 602
 603 void ieee80211_sta_debugfs_remove(struct sta_info *sta)
 604 {
 605         struct ieee80211_local *local = sta->local;
 606         struct ieee80211_sub_if_data *sdata = sta->sdata;
 607
 608         drv_sta_remove_debugfs(local, sdata, &sta->sta, sta->debugfs.dir);
 609         debugfs_remove_recursive(sta->debugfs.dir);
 610         sta->debugfs.dir = NULL;
 611 }