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