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  * Copyright 2013-2014  Intel Mobile Communications GmbH
   6  * Copyright(c) 2016 Intel Deutschland GmbH
   7  *
   8  * This program is free software; you can redistribute it and/or modify
   9  * it under the terms of the GNU General Public License version 2 as
  10  * published by the Free Software Foundation.
  11  */
  12
  13 #include <linux/debugfs.h>
  14 #include <linux/ieee80211.h>
  15 #include "ieee80211_i.h"
  16 #include "debugfs.h"
  17 #include "debugfs_sta.h"
  18 #include "sta_info.h"
  19 #include "driver-ops.h"
  20
  21 /* sta attributtes */
  22
  23 #define STA_READ(name, field, format_string)                            \
  24 static ssize_t sta_ ##name## _read(struct file *file,                   \
  25                                    char __user *userbuf,                \
  26                                    size_t count, loff_t *ppos)          \
  27 {                                                                       \
  28         struct sta_info *sta = file->private_data;                      \
  29         return mac80211_format_buffer(userbuf, count, ppos,             \
  30                                       format_string, sta->field);       \
  31 }
  32 #define STA_READ_D(name, field) STA_READ(name, field, "%d\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_RW(name)                                                \
  42 static const struct file_operations sta_ ##name## _ops = {              \
  43         .read = sta_##name##_read,                                      \
  44         .write = sta_##name##_write,                                    \
  45         .open = simple_open,                                            \
  46         .llseek = generic_file_llseek,                                  \
  47 }
  48
  49 #define STA_FILE(name, field, format)                                   \
  50                 STA_READ_##format(name, field)                          \
  51                 STA_OPS(name)
  52
  53 STA_FILE(aid, sta.aid, D);
  54
  55 static const char * const sta_flag_names[] = {
  56 #define FLAG(F) [WLAN_STA_##F] = #F
  57         FLAG(AUTH),
  58         FLAG(ASSOC),
  59         FLAG(PS_STA),
  60         FLAG(AUTHORIZED),
  61         FLAG(SHORT_PREAMBLE),
  62         FLAG(WDS),
  63         FLAG(CLEAR_PS_FILT),
  64         FLAG(MFP),
  65         FLAG(BLOCK_BA),
  66         FLAG(PS_DRIVER),
  67         FLAG(PSPOLL),
  68         FLAG(TDLS_PEER),
  69         FLAG(TDLS_PEER_AUTH),
  70         FLAG(TDLS_INITIATOR),
  71         FLAG(TDLS_CHAN_SWITCH),
  72         FLAG(TDLS_OFF_CHANNEL),
  73         FLAG(TDLS_WIDER_BW),
  74         FLAG(UAPSD),
  75         FLAG(SP),
  76         FLAG(4ADDR_EVENT),
  77         FLAG(INSERTED),
  78         FLAG(RATE_CONTROL),
  79         FLAG(TOFFSET_KNOWN),
  80         FLAG(MPSP_OWNER),
  81         FLAG(MPSP_RECIPIENT),
  82         FLAG(PS_DELIVER),
  83 #undef FLAG
  84 };
  85
  86 static ssize_t sta_flags_read(struct file *file, char __user *userbuf,
  87                               size_t count, loff_t *ppos)
  88 {
  89         char buf[16 * NUM_WLAN_STA_FLAGS], *pos = buf;
  90         char *end = buf + sizeof(buf) - 1;
  91         struct sta_info *sta = file->private_data;
  92         unsigned int flg;
  93
  94         BUILD_BUG_ON(ARRAY_SIZE(sta_flag_names) != NUM_WLAN_STA_FLAGS);
  95
  96         for (flg = 0; flg < NUM_WLAN_STA_FLAGS; flg++) {
  97                 if (test_sta_flag(sta, flg))
  98                         pos += scnprintf(pos, end - pos, "%s\n",
  99                                          sta_flag_names[flg]);
 100         }
 101
 102         return simple_read_from_buffer(userbuf, count, ppos, buf, strlen(buf));
 103 }
 104 STA_OPS(flags);
 105
 106 static ssize_t sta_num_ps_buf_frames_read(struct file *file,
 107                                           char __user *userbuf,
 108                                           size_t count, loff_t *ppos)
 109 {
 110         struct sta_info *sta = file->private_data;
 111         char buf[17*IEEE80211_NUM_ACS], *p = buf;
 112         int ac;
 113
 114         for (ac = 0; ac < IEEE80211_NUM_ACS; ac++)
 115                 p += scnprintf(p, sizeof(buf)+buf-p, "AC%d: %d\n", ac,
 116                                skb_queue_len(&sta->ps_tx_buf[ac]) +
 117                                skb_queue_len(&sta->tx_filtered[ac]));
 118         return simple_read_from_buffer(userbuf, count, ppos, buf, p - buf);
 119 }
 120 STA_OPS(num_ps_buf_frames);
 121
 122 static ssize_t sta_last_seq_ctrl_read(struct file *file, char __user *userbuf,
 123                                       size_t count, loff_t *ppos)
 124 {
 125         char buf[15*IEEE80211_NUM_TIDS], *p = buf;
 126         int i;
 127         struct sta_info *sta = file->private_data;
 128         for (i = 0; i < IEEE80211_NUM_TIDS; i++)
 129                 p += scnprintf(p, sizeof(buf)+buf-p, "%x ",
 130                                le16_to_cpu(sta->last_seq_ctrl[i]));
 131         p += scnprintf(p, sizeof(buf)+buf-p, "\n");
 132         return simple_read_from_buffer(userbuf, count, ppos, buf, p - buf);
 133 }
 134 STA_OPS(last_seq_ctrl);
 135
 136 #define AQM_TXQ_ENTRY_LEN 130
 137
 138 static ssize_t sta_aqm_read(struct file *file, char __user *userbuf,
 139                         size_t count, loff_t *ppos)
 140 {
 141         struct sta_info *sta = file->private_data;
 142         struct ieee80211_local *local = sta->local;
 143         size_t bufsz = AQM_TXQ_ENTRY_LEN*(IEEE80211_NUM_TIDS+1);
 144         char *buf = kzalloc(bufsz, GFP_KERNEL), *p = buf;
 145         struct txq_info *txqi;
 146         ssize_t rv;
 147         int i;
 148
 149         if (!buf)
 150                 return -ENOMEM;
 151
 152         spin_lock_bh(&local->fq.lock);
 153         rcu_read_lock();
 154
 155         p += scnprintf(p,
 156                        bufsz+buf-p,
 157                        "tid ac backlog-bytes backlog-packets new-flows drops marks overlimit collisions tx-bytes tx-packets\n");
 158
 159         for (i = 0; i < IEEE80211_NUM_TIDS; i++) {
 160                 txqi = to_txq_info(sta->sta.txq[i]);
 161                 p += scnprintf(p, bufsz+buf-p,
 162                                "%d %d %u %u %u %u %u %u %u %u %u\n",
 163                                txqi->txq.tid,
 164                                txqi->txq.ac,
 165                                txqi->tin.backlog_bytes,
 166                                txqi->tin.backlog_packets,
 167                                txqi->tin.flows,
 168                                txqi->cstats.drop_count,
 169                                txqi->cstats.ecn_mark,
 170                                txqi->tin.overlimit,
 171                                txqi->tin.collisions,
 172                                txqi->tin.tx_bytes,
 173                                txqi->tin.tx_packets);
 174         }
 175
 176         rcu_read_unlock();
 177         spin_unlock_bh(&local->fq.lock);
 178
 179         rv = simple_read_from_buffer(userbuf, count, ppos, buf, p - buf);
 180         kfree(buf);
 181         return rv;
 182 }
 183 STA_OPS(aqm);
 184
 185 static ssize_t sta_agg_status_read(struct file *file, char __user *userbuf,
 186                                         size_t count, loff_t *ppos)
 187 {
 188         char buf[71 + IEEE80211_NUM_TIDS * 40], *p = buf;
 189         int i;
 190         struct sta_info *sta = file->private_data;
 191         struct tid_ampdu_rx *tid_rx;
 192         struct tid_ampdu_tx *tid_tx;
 193
 194         rcu_read_lock();
 195
 196         p += scnprintf(p, sizeof(buf) + buf - p, "next dialog_token: %#02x\n",
 197                         sta->ampdu_mlme.dialog_token_allocator + 1);
 198         p += scnprintf(p, sizeof(buf) + buf - p,
 199                        "TID\t\tRX\tDTKN\tSSN\t\tTX\tDTKN\tpending\n");
 200
 201         for (i = 0; i < IEEE80211_NUM_TIDS; i++) {
 202                 tid_rx = rcu_dereference(sta->ampdu_mlme.tid_rx[i]);
 203                 tid_tx = rcu_dereference(sta->ampdu_mlme.tid_tx[i]);
 204
 205                 p += scnprintf(p, sizeof(buf) + buf - p, "%02d", i);
 206                 p += scnprintf(p, sizeof(buf) + buf - p, "\t\t%x", !!tid_rx);
 207                 p += scnprintf(p, sizeof(buf) + buf - p, "\t%#.2x",
 208                                 tid_rx ? tid_rx->dialog_token : 0);
 209                 p += scnprintf(p, sizeof(buf) + buf - p, "\t%#.3x",
 210                                 tid_rx ? tid_rx->ssn : 0);
 211
 212                 p += scnprintf(p, sizeof(buf) + buf - p, "\t\t%x", !!tid_tx);
 213                 p += scnprintf(p, sizeof(buf) + buf - p, "\t%#.2x",
 214                                 tid_tx ? tid_tx->dialog_token : 0);
 215                 p += scnprintf(p, sizeof(buf) + buf - p, "\t%03d",
 216                                 tid_tx ? skb_queue_len(&tid_tx->pending) : 0);
 217                 p += scnprintf(p, sizeof(buf) + buf - p, "\n");
 218         }
 219         rcu_read_unlock();
 220
 221         return simple_read_from_buffer(userbuf, count, ppos, buf, p - buf);
 222 }
 223
 224 static ssize_t sta_agg_status_write(struct file *file, const char __user *userbuf,
 225                                     size_t count, loff_t *ppos)
 226 {
 227         char _buf[25] = {}, *buf = _buf;
 228         struct sta_info *sta = file->private_data;
 229         bool start, tx;
 230         unsigned long tid;
 231         char *pos;
 232         int ret, timeout = 5000;
 233
 234         if (count > sizeof(_buf))
 235                 return -EINVAL;
 236
 237         if (copy_from_user(buf, userbuf, count))
 238                 return -EFAULT;
 239
 240         buf[sizeof(_buf) - 1] = '\0';
 241         pos = buf;
 242         buf = strsep(&pos, " ");
 243         if (!buf)
 244                 return -EINVAL;
 245
 246         if (!strcmp(buf, "tx"))
 247                 tx = true;
 248         else if (!strcmp(buf, "rx"))
 249                 tx = false;
 250         else
 251                 return -EINVAL;
 252
 253         buf = strsep(&pos, " ");
 254         if (!buf)
 255                 return -EINVAL;
 256         if (!strcmp(buf, "start")) {
 257                 start = true;
 258                 if (!tx)
 259                         return -EINVAL;
 260         } else if (!strcmp(buf, "stop")) {
 261                 start = false;
 262         } else {
 263                 return -EINVAL;
 264         }
 265
 266         buf = strsep(&pos, " ");
 267         if (!buf)
 268                 return -EINVAL;
 269         if (sscanf(buf, "timeout=%d", &timeout) == 1) {
 270                 buf = strsep(&pos, " ");
 271                 if (!buf || !tx || !start)
 272                         return -EINVAL;
 273         }
 274
 275         ret = kstrtoul(buf, 0, &tid);
 276         if (ret || tid >= IEEE80211_NUM_TIDS)
 277                 return -EINVAL;
 278
 279         if (tx) {
 280                 if (start)
 281                         ret = ieee80211_start_tx_ba_session(&sta->sta, tid,
 282                                                             timeout);
 283                 else
 284                         ret = ieee80211_stop_tx_ba_session(&sta->sta, tid);
 285         } else {
 286                 __ieee80211_stop_rx_ba_session(sta, tid, WLAN_BACK_RECIPIENT,
 287                                                3, true);
 288                 ret = 0;
 289         }
 290
 291         return ret ?: count;
 292 }
 293 STA_OPS_RW(agg_status);
 294
 295 static ssize_t sta_ht_capa_read(struct file *file, char __user *userbuf,
 296                                 size_t count, loff_t *ppos)
 297 {
 298 #define PRINT_HT_CAP(_cond, _str) \
 299         do { \
 300         if (_cond) \
 301                         p += scnprintf(p, sizeof(buf)+buf-p, "\t" _str "\n"); \
 302         } while (0)
 303         char buf[512], *p = buf;
 304         int i;
 305         struct sta_info *sta = file->private_data;
 306         struct ieee80211_sta_ht_cap *htc = &sta->sta.ht_cap;
 307
 308         p += scnprintf(p, sizeof(buf) + buf - p, "ht %ssupported\n",
 309                         htc->ht_supported ? "" : "not ");
 310         if (htc->ht_supported) {
 311                 p += scnprintf(p, sizeof(buf)+buf-p, "cap: %#.4x\n", htc->cap);
 312
 313                 PRINT_HT_CAP((htc->cap & BIT(0)), "RX LDPC");
 314                 PRINT_HT_CAP((htc->cap & BIT(1)), "HT20/HT40");
 315                 PRINT_HT_CAP(!(htc->cap & BIT(1)), "HT20");
 316
 317                 PRINT_HT_CAP(((htc->cap >> 2) & 0x3) == 0, "Static SM Power Save");
 318                 PRINT_HT_CAP(((htc->cap >> 2) & 0x3) == 1, "Dynamic SM Power Save");
 319                 PRINT_HT_CAP(((htc->cap >> 2) & 0x3) == 3, "SM Power Save disabled");
 320
 321                 PRINT_HT_CAP((htc->cap & BIT(4)), "RX Greenfield");
 322                 PRINT_HT_CAP((htc->cap & BIT(5)), "RX HT20 SGI");
 323                 PRINT_HT_CAP((htc->cap & BIT(6)), "RX HT40 SGI");
 324                 PRINT_HT_CAP((htc->cap & BIT(7)), "TX STBC");
 325
 326                 PRINT_HT_CAP(((htc->cap >> 8) & 0x3) == 0, "No RX STBC");
 327                 PRINT_HT_CAP(((htc->cap >> 8) & 0x3) == 1, "RX STBC 1-stream");
 328                 PRINT_HT_CAP(((htc->cap >> 8) & 0x3) == 2, "RX STBC 2-streams");
 329                 PRINT_HT_CAP(((htc->cap >> 8) & 0x3) == 3, "RX STBC 3-streams");
 330
 331                 PRINT_HT_CAP((htc->cap & BIT(10)), "HT Delayed Block Ack");
 332
 333                 PRINT_HT_CAP(!(htc->cap & BIT(11)), "Max AMSDU length: "
 334                              "3839 bytes");
 335                 PRINT_HT_CAP((htc->cap & BIT(11)), "Max AMSDU length: "
 336                              "7935 bytes");
 337
 338                 /*
 339                  * For beacons and probe response this would mean the BSS
 340                  * does or does not allow the usage of DSSS/CCK HT40.
 341                  * Otherwise it means the STA does or does not use
 342                  * DSSS/CCK HT40.
 343                  */
 344                 PRINT_HT_CAP((htc->cap & BIT(12)), "DSSS/CCK HT40");
 345                 PRINT_HT_CAP(!(htc->cap & BIT(12)), "No DSSS/CCK HT40");
 346
 347                 /* BIT(13) is reserved */
 348
 349                 PRINT_HT_CAP((htc->cap & BIT(14)), "40 MHz Intolerant");
 350
 351                 PRINT_HT_CAP((htc->cap & BIT(15)), "L-SIG TXOP protection");
 352
 353                 p += scnprintf(p, sizeof(buf)+buf-p, "ampdu factor/density: %d/%d\n",
 354                                 htc->ampdu_factor, htc->ampdu_density);
 355                 p += scnprintf(p, sizeof(buf)+buf-p, "MCS mask:");
 356
 357                 for (i = 0; i < IEEE80211_HT_MCS_MASK_LEN; i++)
 358                         p += scnprintf(p, sizeof(buf)+buf-p, " %.2x",
 359                                         htc->mcs.rx_mask[i]);
 360                 p += scnprintf(p, sizeof(buf)+buf-p, "\n");
 361
 362                 /* If not set this is meaningless */
 363                 if (le16_to_cpu(htc->mcs.rx_highest)) {
 364                         p += scnprintf(p, sizeof(buf)+buf-p,
 365                                        "MCS rx highest: %d Mbps\n",
 366                                        le16_to_cpu(htc->mcs.rx_highest));
 367                 }
 368
 369                 p += scnprintf(p, sizeof(buf)+buf-p, "MCS tx params: %x\n",
 370                                 htc->mcs.tx_params);
 371         }
 372
 373         return simple_read_from_buffer(userbuf, count, ppos, buf, p - buf);
 374 }
 375 STA_OPS(ht_capa);
 376
 377 static ssize_t sta_vht_capa_read(struct file *file, char __user *userbuf,
 378                                  size_t count, loff_t *ppos)
 379 {
 380         char buf[512], *p = buf;
 381         struct sta_info *sta = file->private_data;
 382         struct ieee80211_sta_vht_cap *vhtc = &sta->sta.vht_cap;
 383
 384         p += scnprintf(p, sizeof(buf) + buf - p, "VHT %ssupported\n",
 385                         vhtc->vht_supported ? "" : "not ");
 386         if (vhtc->vht_supported) {
 387                 p += scnprintf(p, sizeof(buf) + buf - p, "cap: %#.8x\n",
 388                                vhtc->cap);
 389 #define PFLAG(a, b)                                                     \
 390                 do {                                                    \
 391                         if (vhtc->cap & IEEE80211_VHT_CAP_ ## a)        \
 392                                 p += scnprintf(p, sizeof(buf) + buf - p, \
 393                                                "\t\t%s\n", b);          \
 394                 } while (0)
 395
 396                 switch (vhtc->cap & 0x3) {
 397                 case IEEE80211_VHT_CAP_MAX_MPDU_LENGTH_3895:
 398                         p += scnprintf(p, sizeof(buf) + buf - p,
 399                                        "\t\tMAX-MPDU-3895\n");
 400                         break;
 401                 case IEEE80211_VHT_CAP_MAX_MPDU_LENGTH_7991:
 402                         p += scnprintf(p, sizeof(buf) + buf - p,
 403                                        "\t\tMAX-MPDU-7991\n");
 404                         break;
 405                 case IEEE80211_VHT_CAP_MAX_MPDU_LENGTH_11454:
 406                         p += scnprintf(p, sizeof(buf) + buf - p,
 407                                        "\t\tMAX-MPDU-11454\n");
 408                         break;
 409                 default:
 410                         p += scnprintf(p, sizeof(buf) + buf - p,
 411                                        "\t\tMAX-MPDU-UNKNOWN\n");
 412                 };
 413                 switch (vhtc->cap & IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK) {
 414                 case 0:
 415                         p += scnprintf(p, sizeof(buf) + buf - p,
 416                                        "\t\t80Mhz\n");
 417                         break;
 418                 case IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ:
 419                         p += scnprintf(p, sizeof(buf) + buf - p,
 420                                        "\t\t160Mhz\n");
 421                         break;
 422                 case IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160_80PLUS80MHZ:
 423                         p += scnprintf(p, sizeof(buf) + buf - p,
 424                                        "\t\t80+80Mhz\n");
 425                         break;
 426                 default:
 427                         p += scnprintf(p, sizeof(buf) + buf - p,
 428                                        "\t\tUNKNOWN-MHZ: 0x%x\n",
 429                                        (vhtc->cap >> 2) & 0x3);
 430                 };
 431                 PFLAG(RXLDPC, "RXLDPC");
 432                 PFLAG(SHORT_GI_80, "SHORT-GI-80");
 433                 PFLAG(SHORT_GI_160, "SHORT-GI-160");
 434                 PFLAG(TXSTBC, "TXSTBC");
 435                 p += scnprintf(p, sizeof(buf) + buf - p,
 436                                "\t\tRXSTBC_%d\n", (vhtc->cap >> 8) & 0x7);
 437                 PFLAG(SU_BEAMFORMER_CAPABLE, "SU-BEAMFORMER-CAPABLE");
 438                 PFLAG(SU_BEAMFORMEE_CAPABLE, "SU-BEAMFORMEE-CAPABLE");
 439                 p += scnprintf(p, sizeof(buf) + buf - p,
 440                         "\t\tBEAMFORMEE-STS: 0x%x\n",
 441                         (vhtc->cap & IEEE80211_VHT_CAP_BEAMFORMEE_STS_MASK) >>
 442                         IEEE80211_VHT_CAP_BEAMFORMEE_STS_SHIFT);
 443                 p += scnprintf(p, sizeof(buf) + buf - p,
 444                         "\t\tSOUNDING-DIMENSIONS: 0x%x\n",
 445                         (vhtc->cap & IEEE80211_VHT_CAP_SOUNDING_DIMENSIONS_MASK)
 446                         >> IEEE80211_VHT_CAP_SOUNDING_DIMENSIONS_SHIFT);
 447                 PFLAG(MU_BEAMFORMER_CAPABLE, "MU-BEAMFORMER-CAPABLE");
 448                 PFLAG(MU_BEAMFORMEE_CAPABLE, "MU-BEAMFORMEE-CAPABLE");
 449                 PFLAG(VHT_TXOP_PS, "TXOP-PS");
 450                 PFLAG(HTC_VHT, "HTC-VHT");
 451                 p += scnprintf(p, sizeof(buf) + buf - p,
 452                         "\t\tMPDU-LENGTH-EXPONENT: 0x%x\n",
 453                         (vhtc->cap & IEEE80211_VHT_CAP_MAX_A_MPDU_LENGTH_EXPONENT_MASK) >>
 454                         IEEE80211_VHT_CAP_MAX_A_MPDU_LENGTH_EXPONENT_SHIFT);
 455                 PFLAG(VHT_LINK_ADAPTATION_VHT_UNSOL_MFB,
 456                       "LINK-ADAPTATION-VHT-UNSOL-MFB");
 457                 p += scnprintf(p, sizeof(buf) + buf - p,
 458                         "\t\tLINK-ADAPTATION-VHT-MRQ-MFB: 0x%x\n",
 459                         (vhtc->cap & IEEE80211_VHT_CAP_VHT_LINK_ADAPTATION_VHT_MRQ_MFB) >> 26);
 460                 PFLAG(RX_ANTENNA_PATTERN, "RX-ANTENNA-PATTERN");
 461                 PFLAG(TX_ANTENNA_PATTERN, "TX-ANTENNA-PATTERN");
 462
 463                 p += scnprintf(p, sizeof(buf)+buf-p, "RX MCS: %.4x\n",
 464                                le16_to_cpu(vhtc->vht_mcs.rx_mcs_map));
 465                 if (vhtc->vht_mcs.rx_highest)
 466                         p += scnprintf(p, sizeof(buf)+buf-p,
 467                                        "MCS RX highest: %d Mbps\n",
 468                                        le16_to_cpu(vhtc->vht_mcs.rx_highest));
 469                 p += scnprintf(p, sizeof(buf)+buf-p, "TX MCS: %.4x\n",
 470                                le16_to_cpu(vhtc->vht_mcs.tx_mcs_map));
 471                 if (vhtc->vht_mcs.tx_highest)
 472                         p += scnprintf(p, sizeof(buf)+buf-p,
 473                                        "MCS TX highest: %d Mbps\n",
 474                                        le16_to_cpu(vhtc->vht_mcs.tx_highest));
 475         }
 476
 477         return simple_read_from_buffer(userbuf, count, ppos, buf, p - buf);
 478 }
 479 STA_OPS(vht_capa);
 480
 481
 482 #define DEBUGFS_ADD(name) \
 483         debugfs_create_file(#name, 0400, \
 484                 sta->debugfs_dir, sta, &sta_ ##name## _ops);
 485
 486 #define DEBUGFS_ADD_COUNTER(name, field)                                \
 487         if (sizeof(sta->field) == sizeof(u32))                          \
 488                 debugfs_create_u32(#name, 0400, sta->debugfs_dir,       \
 489                         (u32 *) &sta->field);                           \
 490         else                                                            \
 491                 debugfs_create_u64(#name, 0400, sta->debugfs_dir,       \
 492                         (u64 *) &sta->field);
 493
 494 void ieee80211_sta_debugfs_add(struct sta_info *sta)
 495 {
 496         struct ieee80211_local *local = sta->local;
 497         struct ieee80211_sub_if_data *sdata = sta->sdata;
 498         struct dentry *stations_dir = sta->sdata->debugfs.subdir_stations;
 499         u8 mac[3*ETH_ALEN];
 500
 501         if (!stations_dir)
 502                 return;
 503
 504         snprintf(mac, sizeof(mac), "%pM", sta->sta.addr);
 505
 506         /*
 507          * This might fail due to a race condition:
 508          * When mac80211 unlinks a station, the debugfs entries
 509          * remain, but it is already possible to link a new
 510          * station with the same address which triggers adding
 511          * it to debugfs; therefore, if the old station isn't
 512          * destroyed quickly enough the old station's debugfs
 513          * dir might still be around.
 514          */
 515         sta->debugfs_dir = debugfs_create_dir(mac, stations_dir);
 516         if (!sta->debugfs_dir)
 517                 return;
 518
 519         DEBUGFS_ADD(flags);
 520         DEBUGFS_ADD(num_ps_buf_frames);
 521         DEBUGFS_ADD(last_seq_ctrl);
 522         DEBUGFS_ADD(agg_status);
 523         DEBUGFS_ADD(ht_capa);
 524         DEBUGFS_ADD(vht_capa);
 525
 526         DEBUGFS_ADD_COUNTER(rx_duplicates, rx_stats.num_duplicates);
 527         DEBUGFS_ADD_COUNTER(rx_fragments, rx_stats.fragments);
 528         DEBUGFS_ADD_COUNTER(tx_filtered, status_stats.filtered);
 529
 530         if (local->ops->wake_tx_queue)
 531                 DEBUGFS_ADD(aqm);
 532
 533         if (sizeof(sta->driver_buffered_tids) == sizeof(u32))
 534                 debugfs_create_x32("driver_buffered_tids", 0400,
 535                                    sta->debugfs_dir,
 536                                    (u32 *)&sta->driver_buffered_tids);
 537         else
 538                 debugfs_create_x64("driver_buffered_tids", 0400,
 539                                    sta->debugfs_dir,
 540                                    (u64 *)&sta->driver_buffered_tids);
 541
 542         drv_sta_add_debugfs(local, sdata, &sta->sta, sta->debugfs_dir);
 543 }
 544
 545 void ieee80211_sta_debugfs_remove(struct sta_info *sta)
 546 {
 547         struct ieee80211_local *local = sta->local;
 548         struct ieee80211_sub_if_data *sdata = sta->sdata;
 549
 550         drv_sta_remove_debugfs(local, sdata, &sta->sta, sta->debugfs_dir);
 551         debugfs_remove_recursive(sta->debugfs_dir);
 552         sta->debugfs_dir = NULL;
 553 }