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                 bool tid_rx_valid;
 203
 204                 tid_rx = rcu_dereference(sta->ampdu_mlme.tid_rx[i]);
 205                 tid_tx = rcu_dereference(sta->ampdu_mlme.tid_tx[i]);
 206                 tid_rx_valid = test_bit(i, sta->ampdu_mlme.agg_session_valid);
 207
 208                 p += scnprintf(p, sizeof(buf) + buf - p, "%02d", i);
 209                 p += scnprintf(p, sizeof(buf) + buf - p, "\t\t%x",
 210                                tid_rx_valid);
 211                 p += scnprintf(p, sizeof(buf) + buf - p, "\t%#.2x",
 212                                tid_rx_valid ?
 213                                         sta->ampdu_mlme.tid_rx_token[i] : 0);
 214                 p += scnprintf(p, sizeof(buf) + buf - p, "\t%#.3x",
 215                                 tid_rx ? tid_rx->ssn : 0);
 216
 217                 p += scnprintf(p, sizeof(buf) + buf - p, "\t\t%x", !!tid_tx);
 218                 p += scnprintf(p, sizeof(buf) + buf - p, "\t%#.2x",
 219                                 tid_tx ? tid_tx->dialog_token : 0);
 220                 p += scnprintf(p, sizeof(buf) + buf - p, "\t%03d",
 221                                 tid_tx ? skb_queue_len(&tid_tx->pending) : 0);
 222                 p += scnprintf(p, sizeof(buf) + buf - p, "\n");
 223         }
 224         rcu_read_unlock();
 225
 226         return simple_read_from_buffer(userbuf, count, ppos, buf, p - buf);
 227 }
 228
 229 static ssize_t sta_agg_status_write(struct file *file, const char __user *userbuf,
 230                                     size_t count, loff_t *ppos)
 231 {
 232         char _buf[25] = {}, *buf = _buf;
 233         struct sta_info *sta = file->private_data;
 234         bool start, tx;
 235         unsigned long tid;
 236         char *pos;
 237         int ret, timeout = 5000;
 238
 239         if (count > sizeof(_buf))
 240                 return -EINVAL;
 241
 242         if (copy_from_user(buf, userbuf, count))
 243                 return -EFAULT;
 244
 245         buf[sizeof(_buf) - 1] = '\0';
 246         pos = buf;
 247         buf = strsep(&pos, " ");
 248         if (!buf)
 249                 return -EINVAL;
 250
 251         if (!strcmp(buf, "tx"))
 252                 tx = true;
 253         else if (!strcmp(buf, "rx"))
 254                 tx = false;
 255         else
 256                 return -EINVAL;
 257
 258         buf = strsep(&pos, " ");
 259         if (!buf)
 260                 return -EINVAL;
 261         if (!strcmp(buf, "start")) {
 262                 start = true;
 263                 if (!tx)
 264                         return -EINVAL;
 265         } else if (!strcmp(buf, "stop")) {
 266                 start = false;
 267         } else {
 268                 return -EINVAL;
 269         }
 270
 271         buf = strsep(&pos, " ");
 272         if (!buf)
 273                 return -EINVAL;
 274         if (sscanf(buf, "timeout=%d", &timeout) == 1) {
 275                 buf = strsep(&pos, " ");
 276                 if (!buf || !tx || !start)
 277                         return -EINVAL;
 278         }
 279
 280         ret = kstrtoul(buf, 0, &tid);
 281         if (ret || tid >= IEEE80211_NUM_TIDS)
 282                 return -EINVAL;
 283
 284         if (tx) {
 285                 if (start)
 286                         ret = ieee80211_start_tx_ba_session(&sta->sta, tid,
 287                                                             timeout);
 288                 else
 289                         ret = ieee80211_stop_tx_ba_session(&sta->sta, tid);
 290         } else {
 291                 __ieee80211_stop_rx_ba_session(sta, tid, WLAN_BACK_RECIPIENT,
 292                                                3, true);
 293                 ret = 0;
 294         }
 295
 296         return ret ?: count;
 297 }
 298 STA_OPS_RW(agg_status);
 299
 300 static ssize_t sta_ht_capa_read(struct file *file, char __user *userbuf,
 301                                 size_t count, loff_t *ppos)
 302 {
 303 #define PRINT_HT_CAP(_cond, _str) \
 304         do { \
 305         if (_cond) \
 306                         p += scnprintf(p, sizeof(buf)+buf-p, "\t" _str "\n"); \
 307         } while (0)
 308         char buf[512], *p = buf;
 309         int i;
 310         struct sta_info *sta = file->private_data;
 311         struct ieee80211_sta_ht_cap *htc = &sta->sta.ht_cap;
 312
 313         p += scnprintf(p, sizeof(buf) + buf - p, "ht %ssupported\n",
 314                         htc->ht_supported ? "" : "not ");
 315         if (htc->ht_supported) {
 316                 p += scnprintf(p, sizeof(buf)+buf-p, "cap: %#.4x\n", htc->cap);
 317
 318                 PRINT_HT_CAP((htc->cap & BIT(0)), "RX LDPC");
 319                 PRINT_HT_CAP((htc->cap & BIT(1)), "HT20/HT40");
 320                 PRINT_HT_CAP(!(htc->cap & BIT(1)), "HT20");
 321
 322                 PRINT_HT_CAP(((htc->cap >> 2) & 0x3) == 0, "Static SM Power Save");
 323                 PRINT_HT_CAP(((htc->cap >> 2) & 0x3) == 1, "Dynamic SM Power Save");
 324                 PRINT_HT_CAP(((htc->cap >> 2) & 0x3) == 3, "SM Power Save disabled");
 325
 326                 PRINT_HT_CAP((htc->cap & BIT(4)), "RX Greenfield");
 327                 PRINT_HT_CAP((htc->cap & BIT(5)), "RX HT20 SGI");
 328                 PRINT_HT_CAP((htc->cap & BIT(6)), "RX HT40 SGI");
 329                 PRINT_HT_CAP((htc->cap & BIT(7)), "TX STBC");
 330
 331                 PRINT_HT_CAP(((htc->cap >> 8) & 0x3) == 0, "No RX STBC");
 332                 PRINT_HT_CAP(((htc->cap >> 8) & 0x3) == 1, "RX STBC 1-stream");
 333                 PRINT_HT_CAP(((htc->cap >> 8) & 0x3) == 2, "RX STBC 2-streams");
 334                 PRINT_HT_CAP(((htc->cap >> 8) & 0x3) == 3, "RX STBC 3-streams");
 335
 336                 PRINT_HT_CAP((htc->cap & BIT(10)), "HT Delayed Block Ack");
 337
 338                 PRINT_HT_CAP(!(htc->cap & BIT(11)), "Max AMSDU length: "
 339                              "3839 bytes");
 340                 PRINT_HT_CAP((htc->cap & BIT(11)), "Max AMSDU length: "
 341                              "7935 bytes");
 342
 343                 /*
 344                  * For beacons and probe response this would mean the BSS
 345                  * does or does not allow the usage of DSSS/CCK HT40.
 346                  * Otherwise it means the STA does or does not use
 347                  * DSSS/CCK HT40.
 348                  */
 349                 PRINT_HT_CAP((htc->cap & BIT(12)), "DSSS/CCK HT40");
 350                 PRINT_HT_CAP(!(htc->cap & BIT(12)), "No DSSS/CCK HT40");
 351
 352                 /* BIT(13) is reserved */
 353
 354                 PRINT_HT_CAP((htc->cap & BIT(14)), "40 MHz Intolerant");
 355
 356                 PRINT_HT_CAP((htc->cap & BIT(15)), "L-SIG TXOP protection");
 357
 358                 p += scnprintf(p, sizeof(buf)+buf-p, "ampdu factor/density: %d/%d\n",
 359                                 htc->ampdu_factor, htc->ampdu_density);
 360                 p += scnprintf(p, sizeof(buf)+buf-p, "MCS mask:");
 361
 362                 for (i = 0; i < IEEE80211_HT_MCS_MASK_LEN; i++)
 363                         p += scnprintf(p, sizeof(buf)+buf-p, " %.2x",
 364                                         htc->mcs.rx_mask[i]);
 365                 p += scnprintf(p, sizeof(buf)+buf-p, "\n");
 366
 367                 /* If not set this is meaningless */
 368                 if (le16_to_cpu(htc->mcs.rx_highest)) {
 369                         p += scnprintf(p, sizeof(buf)+buf-p,
 370                                        "MCS rx highest: %d Mbps\n",
 371                                        le16_to_cpu(htc->mcs.rx_highest));
 372                 }
 373
 374                 p += scnprintf(p, sizeof(buf)+buf-p, "MCS tx params: %x\n",
 375                                 htc->mcs.tx_params);
 376         }
 377
 378         return simple_read_from_buffer(userbuf, count, ppos, buf, p - buf);
 379 }
 380 STA_OPS(ht_capa);
 381
 382 static ssize_t sta_vht_capa_read(struct file *file, char __user *userbuf,
 383                                  size_t count, loff_t *ppos)
 384 {
 385         char buf[512], *p = buf;
 386         struct sta_info *sta = file->private_data;
 387         struct ieee80211_sta_vht_cap *vhtc = &sta->sta.vht_cap;
 388
 389         p += scnprintf(p, sizeof(buf) + buf - p, "VHT %ssupported\n",
 390                         vhtc->vht_supported ? "" : "not ");
 391         if (vhtc->vht_supported) {
 392                 p += scnprintf(p, sizeof(buf) + buf - p, "cap: %#.8x\n",
 393                                vhtc->cap);
 394 #define PFLAG(a, b)                                                     \
 395                 do {                                                    \
 396                         if (vhtc->cap & IEEE80211_VHT_CAP_ ## a)        \
 397                                 p += scnprintf(p, sizeof(buf) + buf - p, \
 398                                                "\t\t%s\n", b);          \
 399                 } while (0)
 400
 401                 switch (vhtc->cap & 0x3) {
 402                 case IEEE80211_VHT_CAP_MAX_MPDU_LENGTH_3895:
 403                         p += scnprintf(p, sizeof(buf) + buf - p,
 404                                        "\t\tMAX-MPDU-3895\n");
 405                         break;
 406                 case IEEE80211_VHT_CAP_MAX_MPDU_LENGTH_7991:
 407                         p += scnprintf(p, sizeof(buf) + buf - p,
 408                                        "\t\tMAX-MPDU-7991\n");
 409                         break;
 410                 case IEEE80211_VHT_CAP_MAX_MPDU_LENGTH_11454:
 411                         p += scnprintf(p, sizeof(buf) + buf - p,
 412                                        "\t\tMAX-MPDU-11454\n");
 413                         break;
 414                 default:
 415                         p += scnprintf(p, sizeof(buf) + buf - p,
 416                                        "\t\tMAX-MPDU-UNKNOWN\n");
 417                 };
 418                 switch (vhtc->cap & IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK) {
 419                 case 0:
 420                         p += scnprintf(p, sizeof(buf) + buf - p,
 421                                        "\t\t80Mhz\n");
 422                         break;
 423                 case IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ:
 424                         p += scnprintf(p, sizeof(buf) + buf - p,
 425                                        "\t\t160Mhz\n");
 426                         break;
 427                 case IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160_80PLUS80MHZ:
 428                         p += scnprintf(p, sizeof(buf) + buf - p,
 429                                        "\t\t80+80Mhz\n");
 430                         break;
 431                 default:
 432                         p += scnprintf(p, sizeof(buf) + buf - p,
 433                                        "\t\tUNKNOWN-MHZ: 0x%x\n",
 434                                        (vhtc->cap >> 2) & 0x3);
 435                 };
 436                 PFLAG(RXLDPC, "RXLDPC");
 437                 PFLAG(SHORT_GI_80, "SHORT-GI-80");
 438                 PFLAG(SHORT_GI_160, "SHORT-GI-160");
 439                 PFLAG(TXSTBC, "TXSTBC");
 440                 p += scnprintf(p, sizeof(buf) + buf - p,
 441                                "\t\tRXSTBC_%d\n", (vhtc->cap >> 8) & 0x7);
 442                 PFLAG(SU_BEAMFORMER_CAPABLE, "SU-BEAMFORMER-CAPABLE");
 443                 PFLAG(SU_BEAMFORMEE_CAPABLE, "SU-BEAMFORMEE-CAPABLE");
 444                 p += scnprintf(p, sizeof(buf) + buf - p,
 445                         "\t\tBEAMFORMEE-STS: 0x%x\n",
 446                         (vhtc->cap & IEEE80211_VHT_CAP_BEAMFORMEE_STS_MASK) >>
 447                         IEEE80211_VHT_CAP_BEAMFORMEE_STS_SHIFT);
 448                 p += scnprintf(p, sizeof(buf) + buf - p,
 449                         "\t\tSOUNDING-DIMENSIONS: 0x%x\n",
 450                         (vhtc->cap & IEEE80211_VHT_CAP_SOUNDING_DIMENSIONS_MASK)
 451                         >> IEEE80211_VHT_CAP_SOUNDING_DIMENSIONS_SHIFT);
 452                 PFLAG(MU_BEAMFORMER_CAPABLE, "MU-BEAMFORMER-CAPABLE");
 453                 PFLAG(MU_BEAMFORMEE_CAPABLE, "MU-BEAMFORMEE-CAPABLE");
 454                 PFLAG(VHT_TXOP_PS, "TXOP-PS");
 455                 PFLAG(HTC_VHT, "HTC-VHT");
 456                 p += scnprintf(p, sizeof(buf) + buf - p,
 457                         "\t\tMPDU-LENGTH-EXPONENT: 0x%x\n",
 458                         (vhtc->cap & IEEE80211_VHT_CAP_MAX_A_MPDU_LENGTH_EXPONENT_MASK) >>
 459                         IEEE80211_VHT_CAP_MAX_A_MPDU_LENGTH_EXPONENT_SHIFT);
 460                 PFLAG(VHT_LINK_ADAPTATION_VHT_UNSOL_MFB,
 461                       "LINK-ADAPTATION-VHT-UNSOL-MFB");
 462                 p += scnprintf(p, sizeof(buf) + buf - p,
 463                         "\t\tLINK-ADAPTATION-VHT-MRQ-MFB: 0x%x\n",
 464                         (vhtc->cap & IEEE80211_VHT_CAP_VHT_LINK_ADAPTATION_VHT_MRQ_MFB) >> 26);
 465                 PFLAG(RX_ANTENNA_PATTERN, "RX-ANTENNA-PATTERN");
 466                 PFLAG(TX_ANTENNA_PATTERN, "TX-ANTENNA-PATTERN");
 467
 468                 p += scnprintf(p, sizeof(buf)+buf-p, "RX MCS: %.4x\n",
 469                                le16_to_cpu(vhtc->vht_mcs.rx_mcs_map));
 470                 if (vhtc->vht_mcs.rx_highest)
 471                         p += scnprintf(p, sizeof(buf)+buf-p,
 472                                        "MCS RX highest: %d Mbps\n",
 473                                        le16_to_cpu(vhtc->vht_mcs.rx_highest));
 474                 p += scnprintf(p, sizeof(buf)+buf-p, "TX MCS: %.4x\n",
 475                                le16_to_cpu(vhtc->vht_mcs.tx_mcs_map));
 476                 if (vhtc->vht_mcs.tx_highest)
 477                         p += scnprintf(p, sizeof(buf)+buf-p,
 478                                        "MCS TX highest: %d Mbps\n",
 479                                        le16_to_cpu(vhtc->vht_mcs.tx_highest));
 480         }
 481
 482         return simple_read_from_buffer(userbuf, count, ppos, buf, p - buf);
 483 }
 484 STA_OPS(vht_capa);
 485
 486
 487 #define DEBUGFS_ADD(name) \
 488         debugfs_create_file(#name, 0400, \
 489                 sta->debugfs_dir, sta, &sta_ ##name## _ops);
 490
 491 #define DEBUGFS_ADD_COUNTER(name, field)                                \
 492         if (sizeof(sta->field) == sizeof(u32))                          \
 493                 debugfs_create_u32(#name, 0400, sta->debugfs_dir,       \
 494                         (u32 *) &sta->field);                           \
 495         else                                                            \
 496                 debugfs_create_u64(#name, 0400, sta->debugfs_dir,       \
 497                         (u64 *) &sta->field);
 498
 499 void ieee80211_sta_debugfs_add(struct sta_info *sta)
 500 {
 501         struct ieee80211_local *local = sta->local;
 502         struct ieee80211_sub_if_data *sdata = sta->sdata;
 503         struct dentry *stations_dir = sta->sdata->debugfs.subdir_stations;
 504         u8 mac[3*ETH_ALEN];
 505
 506         if (!stations_dir)
 507                 return;
 508
 509         snprintf(mac, sizeof(mac), "%pM", sta->sta.addr);
 510
 511         /*
 512          * This might fail due to a race condition:
 513          * When mac80211 unlinks a station, the debugfs entries
 514          * remain, but it is already possible to link a new
 515          * station with the same address which triggers adding
 516          * it to debugfs; therefore, if the old station isn't
 517          * destroyed quickly enough the old station's debugfs
 518          * dir might still be around.
 519          */
 520         sta->debugfs_dir = debugfs_create_dir(mac, stations_dir);
 521         if (!sta->debugfs_dir)
 522                 return;
 523
 524         DEBUGFS_ADD(flags);
 525         DEBUGFS_ADD(aid);
 526         DEBUGFS_ADD(num_ps_buf_frames);
 527         DEBUGFS_ADD(last_seq_ctrl);
 528         DEBUGFS_ADD(agg_status);
 529         DEBUGFS_ADD(ht_capa);
 530         DEBUGFS_ADD(vht_capa);
 531
 532         DEBUGFS_ADD_COUNTER(rx_duplicates, rx_stats.num_duplicates);
 533         DEBUGFS_ADD_COUNTER(rx_fragments, rx_stats.fragments);
 534         DEBUGFS_ADD_COUNTER(tx_filtered, status_stats.filtered);
 535
 536         if (local->ops->wake_tx_queue)
 537                 DEBUGFS_ADD(aqm);
 538
 539         if (sizeof(sta->driver_buffered_tids) == sizeof(u32))
 540                 debugfs_create_x32("driver_buffered_tids", 0400,
 541                                    sta->debugfs_dir,
 542                                    (u32 *)&sta->driver_buffered_tids);
 543         else
 544                 debugfs_create_x64("driver_buffered_tids", 0400,
 545                                    sta->debugfs_dir,
 546                                    (u64 *)&sta->driver_buffered_tids);
 547
 548         drv_sta_add_debugfs(local, sdata, &sta->sta, sta->debugfs_dir);
 549 }
 550
 551 void ieee80211_sta_debugfs_remove(struct sta_info *sta)
 552 {
 553         debugfs_remove_recursive(sta->debugfs_dir);
 554         sta->debugfs_dir = NULL;
 555 }