net/mac80211/debugfs_sta.c

   1 /*
   2  * Copyright 2003-2005  Devicescape Software, Inc.
   3  * Copyright (c) 2006   Jiri Benc <[email protected]>
   4  * Copyright 2007       Johannes Berg <[email protected]>
   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                        "target %uus interval %uus ecn %s\n",
 158                        codel_time_to_us(sta->cparams.target),
 159                        codel_time_to_us(sta->cparams.interval),
 160                        sta->cparams.ecn ? "yes" : "no");
 161         p += scnprintf(p,
 162                        bufsz+buf-p,
 163                        "tid ac backlog-bytes backlog-packets new-flows drops marks overlimit collisions tx-bytes tx-packets flags\n");
 164
 165         for (i = 0; i < IEEE80211_NUM_TIDS; i++) {
 166                 txqi = to_txq_info(sta->sta.txq[i]);
 167                 p += scnprintf(p, bufsz+buf-p,
 168                                "%d %d %u %u %u %u %u %u %u %u %u 0x%lx(%s%s%s)\n",
 169                                txqi->txq.tid,
 170                                txqi->txq.ac,
 171                                txqi->tin.backlog_bytes,
 172                                txqi->tin.backlog_packets,
 173                                txqi->tin.flows,
 174                                txqi->cstats.drop_count,
 175                                txqi->cstats.ecn_mark,
 176                                txqi->tin.overlimit,
 177                                txqi->tin.collisions,
 178                                txqi->tin.tx_bytes,
 179                                txqi->tin.tx_packets,
 180                                txqi->flags,
 181                                txqi->flags & (1<<IEEE80211_TXQ_STOP) ? "STOP" : "RUN",
 182                                txqi->flags & (1<<IEEE80211_TXQ_AMPDU) ? " AMPDU" : "",
 183                                txqi->flags & (1<<IEEE80211_TXQ_NO_AMSDU) ? " NO-AMSDU" : "");
 184         }
 185
 186         rcu_read_unlock();
 187         spin_unlock_bh(&local->fq.lock);
 188
 189         rv = simple_read_from_buffer(userbuf, count, ppos, buf, p - buf);
 190         kfree(buf);
 191         return rv;
 192 }
 193 STA_OPS(aqm);
 194
 195 static ssize_t sta_agg_status_read(struct file *file, char __user *userbuf,
 196                                         size_t count, loff_t *ppos)
 197 {
 198         char buf[71 + IEEE80211_NUM_TIDS * 40], *p = buf;
 199         int i;
 200         struct sta_info *sta = file->private_data;
 201         struct tid_ampdu_rx *tid_rx;
 202         struct tid_ampdu_tx *tid_tx;
 203
 204         rcu_read_lock();
 205
 206         p += scnprintf(p, sizeof(buf) + buf - p, "next dialog_token: %#02x\n",
 207                         sta->ampdu_mlme.dialog_token_allocator + 1);
 208         p += scnprintf(p, sizeof(buf) + buf - p,
 209                        "TID\t\tRX\tDTKN\tSSN\t\tTX\tDTKN\tpending\n");
 210
 211         for (i = 0; i < IEEE80211_NUM_TIDS; i++) {
 212                 bool tid_rx_valid;
 213
 214                 tid_rx = rcu_dereference(sta->ampdu_mlme.tid_rx[i]);
 215                 tid_tx = rcu_dereference(sta->ampdu_mlme.tid_tx[i]);
 216                 tid_rx_valid = test_bit(i, sta->ampdu_mlme.agg_session_valid);
 217
 218                 p += scnprintf(p, sizeof(buf) + buf - p, "%02d", i);
 219                 p += scnprintf(p, sizeof(buf) + buf - p, "\t\t%x",
 220                                tid_rx_valid);
 221                 p += scnprintf(p, sizeof(buf) + buf - p, "\t%#.2x",
 222                                tid_rx_valid ?
 223                                         sta->ampdu_mlme.tid_rx_token[i] : 0);
 224                 p += scnprintf(p, sizeof(buf) + buf - p, "\t%#.3x",
 225                                 tid_rx ? tid_rx->ssn : 0);
 226
 227                 p += scnprintf(p, sizeof(buf) + buf - p, "\t\t%x", !!tid_tx);
 228                 p += scnprintf(p, sizeof(buf) + buf - p, "\t%#.2x",
 229                                 tid_tx ? tid_tx->dialog_token : 0);
 230                 p += scnprintf(p, sizeof(buf) + buf - p, "\t%03d",
 231                                 tid_tx ? skb_queue_len(&tid_tx->pending) : 0);
 232                 p += scnprintf(p, sizeof(buf) + buf - p, "\n");
 233         }
 234         rcu_read_unlock();
 235
 236         return simple_read_from_buffer(userbuf, count, ppos, buf, p - buf);
 237 }
 238
 239 static ssize_t sta_agg_status_write(struct file *file, const char __user *userbuf,
 240                                     size_t count, loff_t *ppos)
 241 {
 242         char _buf[25] = {}, *buf = _buf;
 243         struct sta_info *sta = file->private_data;
 244         bool start, tx;
 245         unsigned long tid;
 246         char *pos;
 247         int ret, timeout = 5000;
 248
 249         if (count > sizeof(_buf))
 250                 return -EINVAL;
 251
 252         if (copy_from_user(buf, userbuf, count))
 253                 return -EFAULT;
 254
 255         buf[sizeof(_buf) - 1] = '\0';
 256         pos = buf;
 257         buf = strsep(&pos, " ");
 258         if (!buf)
 259                 return -EINVAL;
 260
 261         if (!strcmp(buf, "tx"))
 262                 tx = true;
 263         else if (!strcmp(buf, "rx"))
 264                 tx = false;
 265         else
 266                 return -EINVAL;
 267
 268         buf = strsep(&pos, " ");
 269         if (!buf)
 270                 return -EINVAL;
 271         if (!strcmp(buf, "start")) {
 272                 start = true;
 273                 if (!tx)
 274                         return -EINVAL;
 275         } else if (!strcmp(buf, "stop")) {
 276                 start = false;
 277         } else {
 278                 return -EINVAL;
 279         }
 280
 281         buf = strsep(&pos, " ");
 282         if (!buf)
 283                 return -EINVAL;
 284         if (sscanf(buf, "timeout=%d", &timeout) == 1) {
 285                 buf = strsep(&pos, " ");
 286                 if (!buf || !tx || !start)
 287                         return -EINVAL;
 288         }
 289
 290         ret = kstrtoul(buf, 0, &tid);
 291         if (ret || tid >= IEEE80211_NUM_TIDS)
 292                 return -EINVAL;
 293
 294         if (tx) {
 295                 if (start)
 296                         ret = ieee80211_start_tx_ba_session(&sta->sta, tid,
 297                                                             timeout);
 298                 else
 299                         ret = ieee80211_stop_tx_ba_session(&sta->sta, tid);
 300         } else {
 301                 __ieee80211_stop_rx_ba_session(sta, tid, WLAN_BACK_RECIPIENT,
 302                                                3, true);
 303                 ret = 0;
 304         }
 305
 306         return ret ?: count;
 307 }
 308 STA_OPS_RW(agg_status);
 309
 310 static ssize_t sta_ht_capa_read(struct file *file, char __user *userbuf,
 311                                 size_t count, loff_t *ppos)
 312 {
 313 #define PRINT_HT_CAP(_cond, _str) \
 314         do { \
 315         if (_cond) \
 316                         p += scnprintf(p, sizeof(buf)+buf-p, "\t" _str "\n"); \
 317         } while (0)
 318         char buf[512], *p = buf;
 319         int i;
 320         struct sta_info *sta = file->private_data;
 321         struct ieee80211_sta_ht_cap *htc = &sta->sta.ht_cap;
 322
 323         p += scnprintf(p, sizeof(buf) + buf - p, "ht %ssupported\n",
 324                         htc->ht_supported ? "" : "not ");
 325         if (htc->ht_supported) {
 326                 p += scnprintf(p, sizeof(buf)+buf-p, "cap: %#.4x\n", htc->cap);
 327
 328                 PRINT_HT_CAP((htc->cap & BIT(0)), "RX LDPC");
 329                 PRINT_HT_CAP((htc->cap & BIT(1)), "HT20/HT40");
 330                 PRINT_HT_CAP(!(htc->cap & BIT(1)), "HT20");
 331
 332                 PRINT_HT_CAP(((htc->cap >> 2) & 0x3) == 0, "Static SM Power Save");
 333                 PRINT_HT_CAP(((htc->cap >> 2) & 0x3) == 1, "Dynamic SM Power Save");
 334                 PRINT_HT_CAP(((htc->cap >> 2) & 0x3) == 3, "SM Power Save disabled");
 335
 336                 PRINT_HT_CAP((htc->cap & BIT(4)), "RX Greenfield");
 337                 PRINT_HT_CAP((htc->cap & BIT(5)), "RX HT20 SGI");
 338                 PRINT_HT_CAP((htc->cap & BIT(6)), "RX HT40 SGI");
 339                 PRINT_HT_CAP((htc->cap & BIT(7)), "TX STBC");
 340
 341                 PRINT_HT_CAP(((htc->cap >> 8) & 0x3) == 0, "No RX STBC");
 342                 PRINT_HT_CAP(((htc->cap >> 8) & 0x3) == 1, "RX STBC 1-stream");
 343                 PRINT_HT_CAP(((htc->cap >> 8) & 0x3) == 2, "RX STBC 2-streams");
 344                 PRINT_HT_CAP(((htc->cap >> 8) & 0x3) == 3, "RX STBC 3-streams");
 345
 346                 PRINT_HT_CAP((htc->cap & BIT(10)), "HT Delayed Block Ack");
 347
 348                 PRINT_HT_CAP(!(htc->cap & BIT(11)), "Max AMSDU length: "
 349                              "3839 bytes");
 350                 PRINT_HT_CAP((htc->cap & BIT(11)), "Max AMSDU length: "
 351                              "7935 bytes");
 352
 353                 /*
 354                  * For beacons and probe response this would mean the BSS
 355                  * does or does not allow the usage of DSSS/CCK HT40.
 356                  * Otherwise it means the STA does or does not use
 357                  * DSSS/CCK HT40.
 358                  */
 359                 PRINT_HT_CAP((htc->cap & BIT(12)), "DSSS/CCK HT40");
 360                 PRINT_HT_CAP(!(htc->cap & BIT(12)), "No DSSS/CCK HT40");
 361
 362                 /* BIT(13) is reserved */
 363
 364                 PRINT_HT_CAP((htc->cap & BIT(14)), "40 MHz Intolerant");
 365
 366                 PRINT_HT_CAP((htc->cap & BIT(15)), "L-SIG TXOP protection");
 367
 368                 p += scnprintf(p, sizeof(buf)+buf-p, "ampdu factor/density: %d/%d\n",
 369                                 htc->ampdu_factor, htc->ampdu_density);
 370                 p += scnprintf(p, sizeof(buf)+buf-p, "MCS mask:");
 371
 372                 for (i = 0; i < IEEE80211_HT_MCS_MASK_LEN; i++)
 373                         p += scnprintf(p, sizeof(buf)+buf-p, " %.2x",
 374                                         htc->mcs.rx_mask[i]);
 375                 p += scnprintf(p, sizeof(buf)+buf-p, "\n");
 376
 377                 /* If not set this is meaningless */
 378                 if (le16_to_cpu(htc->mcs.rx_highest)) {
 379                         p += scnprintf(p, sizeof(buf)+buf-p,
 380                                        "MCS rx highest: %d Mbps\n",
 381                                        le16_to_cpu(htc->mcs.rx_highest));
 382                 }
 383
 384                 p += scnprintf(p, sizeof(buf)+buf-p, "MCS tx params: %x\n",
 385                                 htc->mcs.tx_params);
 386         }
 387
 388         return simple_read_from_buffer(userbuf, count, ppos, buf, p - buf);
 389 }
 390 STA_OPS(ht_capa);
 391
 392 static ssize_t sta_vht_capa_read(struct file *file, char __user *userbuf,
 393                                  size_t count, loff_t *ppos)
 394 {
 395         char buf[512], *p = buf;
 396         struct sta_info *sta = file->private_data;
 397         struct ieee80211_sta_vht_cap *vhtc = &sta->sta.vht_cap;
 398
 399         p += scnprintf(p, sizeof(buf) + buf - p, "VHT %ssupported\n",
 400                         vhtc->vht_supported ? "" : "not ");
 401         if (vhtc->vht_supported) {
 402                 p += scnprintf(p, sizeof(buf) + buf - p, "cap: %#.8x\n",
 403                                vhtc->cap);
 404 #define PFLAG(a, b)                                                     \
 405                 do {                                                    \
 406                         if (vhtc->cap & IEEE80211_VHT_CAP_ ## a)        \
 407                                 p += scnprintf(p, sizeof(buf) + buf - p, \
 408                                                "\t\t%s\n", b);          \
 409                 } while (0)
 410
 411                 switch (vhtc->cap & 0x3) {
 412                 case IEEE80211_VHT_CAP_MAX_MPDU_LENGTH_3895:
 413                         p += scnprintf(p, sizeof(buf) + buf - p,
 414                                        "\t\tMAX-MPDU-3895\n");
 415                         break;
 416                 case IEEE80211_VHT_CAP_MAX_MPDU_LENGTH_7991:
 417                         p += scnprintf(p, sizeof(buf) + buf - p,
 418                                        "\t\tMAX-MPDU-7991\n");
 419                         break;
 420                 case IEEE80211_VHT_CAP_MAX_MPDU_LENGTH_11454:
 421                         p += scnprintf(p, sizeof(buf) + buf - p,
 422                                        "\t\tMAX-MPDU-11454\n");
 423                         break;
 424                 default:
 425                         p += scnprintf(p, sizeof(buf) + buf - p,
 426                                        "\t\tMAX-MPDU-UNKNOWN\n");
 427                 }
 428                 switch (vhtc->cap & IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK) {
 429                 case 0:
 430                         p += scnprintf(p, sizeof(buf) + buf - p,
 431                                        "\t\t80Mhz\n");
 432                         break;
 433                 case IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ:
 434                         p += scnprintf(p, sizeof(buf) + buf - p,
 435                                        "\t\t160Mhz\n");
 436                         break;
 437                 case IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160_80PLUS80MHZ:
 438                         p += scnprintf(p, sizeof(buf) + buf - p,
 439                                        "\t\t80+80Mhz\n");
 440                         break;
 441                 default:
 442                         p += scnprintf(p, sizeof(buf) + buf - p,
 443                                        "\t\tUNKNOWN-MHZ: 0x%x\n",
 444                                        (vhtc->cap >> 2) & 0x3);
 445                 }
 446                 PFLAG(RXLDPC, "RXLDPC");
 447                 PFLAG(SHORT_GI_80, "SHORT-GI-80");
 448                 PFLAG(SHORT_GI_160, "SHORT-GI-160");
 449                 PFLAG(TXSTBC, "TXSTBC");
 450                 p += scnprintf(p, sizeof(buf) + buf - p,
 451                                "\t\tRXSTBC_%d\n", (vhtc->cap >> 8) & 0x7);
 452                 PFLAG(SU_BEAMFORMER_CAPABLE, "SU-BEAMFORMER-CAPABLE");
 453                 PFLAG(SU_BEAMFORMEE_CAPABLE, "SU-BEAMFORMEE-CAPABLE");
 454                 p += scnprintf(p, sizeof(buf) + buf - p,
 455                         "\t\tBEAMFORMEE-STS: 0x%x\n",
 456                         (vhtc->cap & IEEE80211_VHT_CAP_BEAMFORMEE_STS_MASK) >>
 457                         IEEE80211_VHT_CAP_BEAMFORMEE_STS_SHIFT);
 458                 p += scnprintf(p, sizeof(buf) + buf - p,
 459                         "\t\tSOUNDING-DIMENSIONS: 0x%x\n",
 460                         (vhtc->cap & IEEE80211_VHT_CAP_SOUNDING_DIMENSIONS_MASK)
 461                         >> IEEE80211_VHT_CAP_SOUNDING_DIMENSIONS_SHIFT);
 462                 PFLAG(MU_BEAMFORMER_CAPABLE, "MU-BEAMFORMER-CAPABLE");
 463                 PFLAG(MU_BEAMFORMEE_CAPABLE, "MU-BEAMFORMEE-CAPABLE");
 464                 PFLAG(VHT_TXOP_PS, "TXOP-PS");
 465                 PFLAG(HTC_VHT, "HTC-VHT");
 466                 p += scnprintf(p, sizeof(buf) + buf - p,
 467                         "\t\tMPDU-LENGTH-EXPONENT: 0x%x\n",
 468                         (vhtc->cap & IEEE80211_VHT_CAP_MAX_A_MPDU_LENGTH_EXPONENT_MASK) >>
 469                         IEEE80211_VHT_CAP_MAX_A_MPDU_LENGTH_EXPONENT_SHIFT);
 470                 PFLAG(VHT_LINK_ADAPTATION_VHT_UNSOL_MFB,
 471                       "LINK-ADAPTATION-VHT-UNSOL-MFB");
 472                 p += scnprintf(p, sizeof(buf) + buf - p,
 473                         "\t\tLINK-ADAPTATION-VHT-MRQ-MFB: 0x%x\n",
 474                         (vhtc->cap & IEEE80211_VHT_CAP_VHT_LINK_ADAPTATION_VHT_MRQ_MFB) >> 26);
 475                 PFLAG(RX_ANTENNA_PATTERN, "RX-ANTENNA-PATTERN");
 476                 PFLAG(TX_ANTENNA_PATTERN, "TX-ANTENNA-PATTERN");
 477
 478                 p += scnprintf(p, sizeof(buf)+buf-p, "RX MCS: %.4x\n",
 479                                le16_to_cpu(vhtc->vht_mcs.rx_mcs_map));
 480                 if (vhtc->vht_mcs.rx_highest)
 481                         p += scnprintf(p, sizeof(buf)+buf-p,
 482                                        "MCS RX highest: %d Mbps\n",
 483                                        le16_to_cpu(vhtc->vht_mcs.rx_highest));
 484                 p += scnprintf(p, sizeof(buf)+buf-p, "TX MCS: %.4x\n",
 485                                le16_to_cpu(vhtc->vht_mcs.tx_mcs_map));
 486                 if (vhtc->vht_mcs.tx_highest)
 487                         p += scnprintf(p, sizeof(buf)+buf-p,
 488                                        "MCS TX highest: %d Mbps\n",
 489                                        le16_to_cpu(vhtc->vht_mcs.tx_highest));
 490         }
 491
 492         return simple_read_from_buffer(userbuf, count, ppos, buf, p - buf);
 493 }
 494 STA_OPS(vht_capa);
 495
 496
 497 #define DEBUGFS_ADD(name) \
 498         debugfs_create_file(#name, 0400, \
 499                 sta->debugfs_dir, sta, &sta_ ##name## _ops);
 500
 501 #define DEBUGFS_ADD_COUNTER(name, field)                                \
 502         if (sizeof(sta->field) == sizeof(u32))                          \
 503                 debugfs_create_u32(#name, 0400, sta->debugfs_dir,       \
 504                         (u32 *) &sta->field);                           \
 505         else                                                            \
 506                 debugfs_create_u64(#name, 0400, sta->debugfs_dir,       \
 507                         (u64 *) &sta->field);
 508
 509 void ieee80211_sta_debugfs_add(struct sta_info *sta)
 510 {
 511         struct ieee80211_local *local = sta->local;
 512         struct ieee80211_sub_if_data *sdata = sta->sdata;
 513         struct dentry *stations_dir = sta->sdata->debugfs.subdir_stations;
 514         u8 mac[3*ETH_ALEN];
 515
 516         if (!stations_dir)
 517                 return;
 518
 519         snprintf(mac, sizeof(mac), "%pM", sta->sta.addr);
 520
 521         /*
 522          * This might fail due to a race condition:
 523          * When mac80211 unlinks a station, the debugfs entries
 524          * remain, but it is already possible to link a new
 525          * station with the same address which triggers adding
 526          * it to debugfs; therefore, if the old station isn't
 527          * destroyed quickly enough the old station's debugfs
 528          * dir might still be around.
 529          */
 530         sta->debugfs_dir = debugfs_create_dir(mac, stations_dir);
 531         if (!sta->debugfs_dir)
 532                 return;
 533
 534         DEBUGFS_ADD(flags);
 535         DEBUGFS_ADD(aid);
 536         DEBUGFS_ADD(num_ps_buf_frames);
 537         DEBUGFS_ADD(last_seq_ctrl);
 538         DEBUGFS_ADD(agg_status);
 539         DEBUGFS_ADD(ht_capa);
 540         DEBUGFS_ADD(vht_capa);
 541
 542         DEBUGFS_ADD_COUNTER(rx_duplicates, rx_stats.num_duplicates);
 543         DEBUGFS_ADD_COUNTER(rx_fragments, rx_stats.fragments);
 544         DEBUGFS_ADD_COUNTER(tx_filtered, status_stats.filtered);
 545
 546         if (local->ops->wake_tx_queue)
 547                 DEBUGFS_ADD(aqm);
 548
 549         if (sizeof(sta->driver_buffered_tids) == sizeof(u32))
 550                 debugfs_create_x32("driver_buffered_tids", 0400,
 551                                    sta->debugfs_dir,
 552                                    (u32 *)&sta->driver_buffered_tids);
 553         else
 554                 debugfs_create_x64("driver_buffered_tids", 0400,
 555                                    sta->debugfs_dir,
 556                                    (u64 *)&sta->driver_buffered_tids);
 557
 558         drv_sta_add_debugfs(local, sdata, &sta->sta, sta->debugfs_dir);
 559 }
 560
 561 void ieee80211_sta_debugfs_remove(struct sta_info *sta)
 562 {
 563         debugfs_remove_recursive(sta->debugfs_dir);
 564         sta->debugfs_dir = NULL;
 565 }