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