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  *
   7  * This program is free software; you can redistribute it and/or modify
   8  * it under the terms of the GNU General Public License version 2 as
   9  * published by the Free Software Foundation.
  10  */
  11
  12 #include <linux/debugfs.h>
  13 #include <linux/ieee80211.h>
  14 #include "ieee80211_i.h"
  15 #include "debugfs.h"
  16 #include "debugfs_sta.h"
  17 #include "sta_info.h"
  18 #include "driver-ops.h"
  19
  20 /* sta attributtes */
  21
  22 #define STA_READ(name, field, format_string)                            \
  23 static ssize_t sta_ ##name## _read(struct file *file,                   \
  24                                    char __user *userbuf,                \
  25                                    size_t count, loff_t *ppos)          \
  26 {                                                                       \
  27         struct sta_info *sta = file->private_data;                      \
  28         return mac80211_format_buffer(userbuf, count, ppos,             \
  29                                       format_string, sta->field);       \
  30 }
  31 #define STA_READ_D(name, field) STA_READ(name, field, "%d\n")
  32 #define STA_READ_U(name, field) STA_READ(name, field, "%u\n")
  33 #define STA_READ_S(name, field) STA_READ(name, field, "%s\n")
  34
  35 #define STA_OPS(name)                                                   \
  36 static const struct file_operations sta_ ##name## _ops = {              \
  37         .read = sta_##name##_read,                                      \
  38         .open = simple_open,                                            \
  39         .llseek = generic_file_llseek,                                  \
  40 }
  41
  42 #define STA_OPS_W(name)                                                 \
  43 static const struct file_operations sta_ ##name## _ops = {              \
  44         .write = sta_##name##_write,                                    \
  45         .open = simple_open,                                            \
  46         .llseek = generic_file_llseek,                                  \
  47 }
  48
  49 #define STA_OPS_RW(name)                                                \
  50 static const struct file_operations sta_ ##name## _ops = {              \
  51         .read = sta_##name##_read,                                      \
  52         .write = sta_##name##_write,                                    \
  53         .open = simple_open,                                            \
  54         .llseek = generic_file_llseek,                                  \
  55 }
  56
  57 #define STA_FILE(name, field, format)                                   \
  58                 STA_READ_##format(name, field)                          \
  59                 STA_OPS(name)
  60
  61 STA_FILE(aid, sta.aid, D);
  62 STA_FILE(dev, sdata->name, S);
  63 STA_FILE(last_signal, last_signal, D);
  64 STA_FILE(last_ack_signal, last_ack_signal, D);
  65 STA_FILE(beacon_loss_count, beacon_loss_count, D);
  66
  67 static ssize_t sta_flags_read(struct file *file, char __user *userbuf,
  68                               size_t count, loff_t *ppos)
  69 {
  70         char buf[121];
  71         struct sta_info *sta = file->private_data;
  72
  73 #define TEST(flg) \
  74         test_sta_flag(sta, WLAN_STA_##flg) ? #flg "\n" : ""
  75
  76         int res = scnprintf(buf, sizeof(buf),
  77                             "%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s",
  78                             TEST(AUTH), TEST(ASSOC), TEST(PS_STA),
  79                             TEST(PS_DRIVER), TEST(AUTHORIZED),
  80                             TEST(SHORT_PREAMBLE),
  81                             sta->sta.wme ? "WME\n" : "",
  82                             TEST(WDS), TEST(CLEAR_PS_FILT),
  83                             TEST(MFP), TEST(BLOCK_BA), TEST(PSPOLL),
  84                             TEST(UAPSD), TEST(SP), TEST(TDLS_PEER),
  85                             TEST(TDLS_PEER_AUTH), TEST(TDLS_INITIATOR),
  86                             TEST(TDLS_CHAN_SWITCH), TEST(TDLS_OFF_CHANNEL),
  87                             TEST(4ADDR_EVENT), TEST(INSERTED),
  88                             TEST(RATE_CONTROL), TEST(TOFFSET_KNOWN),
  89                             TEST(MPSP_OWNER), TEST(MPSP_RECIPIENT));
  90 #undef TEST
  91         return simple_read_from_buffer(userbuf, count, ppos, buf, res);
  92 }
  93 STA_OPS(flags);
  94
  95 static ssize_t sta_num_ps_buf_frames_read(struct file *file,
  96                                           char __user *userbuf,
  97                                           size_t count, loff_t *ppos)
  98 {
  99         struct sta_info *sta = file->private_data;
 100         char buf[17*IEEE80211_NUM_ACS], *p = buf;
 101         int ac;
 102
 103         for (ac = 0; ac < IEEE80211_NUM_ACS; ac++)
 104                 p += scnprintf(p, sizeof(buf)+buf-p, "AC%d: %d\n", ac,
 105                                skb_queue_len(&sta->ps_tx_buf[ac]) +
 106                                skb_queue_len(&sta->tx_filtered[ac]));
 107         return simple_read_from_buffer(userbuf, count, ppos, buf, p - buf);
 108 }
 109 STA_OPS(num_ps_buf_frames);
 110
 111 static ssize_t sta_inactive_ms_read(struct file *file, char __user *userbuf,
 112                                     size_t count, loff_t *ppos)
 113 {
 114         struct sta_info *sta = file->private_data;
 115         return mac80211_format_buffer(userbuf, count, ppos, "%d\n",
 116                                       jiffies_to_msecs(jiffies - sta->last_rx));
 117 }
 118 STA_OPS(inactive_ms);
 119
 120
 121 static ssize_t sta_connected_time_read(struct file *file, char __user *userbuf,
 122                                         size_t count, loff_t *ppos)
 123 {
 124         struct sta_info *sta = file->private_data;
 125         struct timespec uptime;
 126         struct tm result;
 127         long connected_time_secs;
 128         char buf[100];
 129         int res;
 130         ktime_get_ts(&uptime);
 131         connected_time_secs = uptime.tv_sec - sta->last_connected;
 132         time_to_tm(connected_time_secs, 0, &result);
 133         result.tm_year -= 70;
 134         result.tm_mday -= 1;
 135         res = scnprintf(buf, sizeof(buf),
 136                 "years  - %ld\nmonths - %d\ndays   - %d\nclock  - %d:%d:%d\n\n",
 137                         result.tm_year, result.tm_mon, result.tm_mday,
 138                         result.tm_hour, result.tm_min, result.tm_sec);
 139         return simple_read_from_buffer(userbuf, count, ppos, buf, res);
 140 }
 141 STA_OPS(connected_time);
 142
 143
 144
 145 static ssize_t sta_last_seq_ctrl_read(struct file *file, char __user *userbuf,
 146                                       size_t count, loff_t *ppos)
 147 {
 148         char buf[15*IEEE80211_NUM_TIDS], *p = buf;
 149         int i;
 150         struct sta_info *sta = file->private_data;
 151         for (i = 0; i < IEEE80211_NUM_TIDS; i++)
 152                 p += scnprintf(p, sizeof(buf)+buf-p, "%x ",
 153                                le16_to_cpu(sta->last_seq_ctrl[i]));
 154         p += scnprintf(p, sizeof(buf)+buf-p, "\n");
 155         return simple_read_from_buffer(userbuf, count, ppos, buf, p - buf);
 156 }
 157 STA_OPS(last_seq_ctrl);
 158
 159 static ssize_t sta_agg_status_read(struct file *file, char __user *userbuf,
 160                                         size_t count, loff_t *ppos)
 161 {
 162         char buf[71 + IEEE80211_NUM_TIDS * 40], *p = buf;
 163         int i;
 164         struct sta_info *sta = file->private_data;
 165         struct tid_ampdu_rx *tid_rx;
 166         struct tid_ampdu_tx *tid_tx;
 167
 168         rcu_read_lock();
 169
 170         p += scnprintf(p, sizeof(buf) + buf - p, "next dialog_token: %#02x\n",
 171                         sta->ampdu_mlme.dialog_token_allocator + 1);
 172         p += scnprintf(p, sizeof(buf) + buf - p,
 173                        "TID\t\tRX\tDTKN\tSSN\t\tTX\tDTKN\tpending\n");
 174
 175         for (i = 0; i < IEEE80211_NUM_TIDS; i++) {
 176                 tid_rx = rcu_dereference(sta->ampdu_mlme.tid_rx[i]);
 177                 tid_tx = rcu_dereference(sta->ampdu_mlme.tid_tx[i]);
 178
 179                 p += scnprintf(p, sizeof(buf) + buf - p, "%02d", i);
 180                 p += scnprintf(p, sizeof(buf) + buf - p, "\t\t%x", !!tid_rx);
 181                 p += scnprintf(p, sizeof(buf) + buf - p, "\t%#.2x",
 182                                 tid_rx ? tid_rx->dialog_token : 0);
 183                 p += scnprintf(p, sizeof(buf) + buf - p, "\t%#.3x",
 184                                 tid_rx ? tid_rx->ssn : 0);
 185
 186                 p += scnprintf(p, sizeof(buf) + buf - p, "\t\t%x", !!tid_tx);
 187                 p += scnprintf(p, sizeof(buf) + buf - p, "\t%#.2x",
 188                                 tid_tx ? tid_tx->dialog_token : 0);
 189                 p += scnprintf(p, sizeof(buf) + buf - p, "\t%03d",
 190                                 tid_tx ? skb_queue_len(&tid_tx->pending) : 0);
 191                 p += scnprintf(p, sizeof(buf) + buf - p, "\n");
 192         }
 193         rcu_read_unlock();
 194
 195         return simple_read_from_buffer(userbuf, count, ppos, buf, p - buf);
 196 }
 197
 198 static ssize_t sta_agg_status_write(struct file *file, const char __user *userbuf,
 199                                     size_t count, loff_t *ppos)
 200 {
 201         char _buf[12] = {}, *buf = _buf;
 202         struct sta_info *sta = file->private_data;
 203         bool start, tx;
 204         unsigned long tid;
 205         int ret;
 206
 207         if (count > sizeof(_buf))
 208                 return -EINVAL;
 209
 210         if (copy_from_user(buf, userbuf, count))
 211                 return -EFAULT;
 212
 213         buf[sizeof(_buf) - 1] = '\0';
 214
 215         if (strncmp(buf, "tx ", 3) == 0) {
 216                 buf += 3;
 217                 tx = true;
 218         } else if (strncmp(buf, "rx ", 3) == 0) {
 219                 buf += 3;
 220                 tx = false;
 221         } else
 222                 return -EINVAL;
 223
 224         if (strncmp(buf, "start ", 6) == 0) {
 225                 buf += 6;
 226                 start = true;
 227                 if (!tx)
 228                         return -EINVAL;
 229         } else if (strncmp(buf, "stop ", 5) == 0) {
 230                 buf += 5;
 231                 start = false;
 232         } else
 233                 return -EINVAL;
 234
 235         ret = kstrtoul(buf, 0, &tid);
 236         if (ret)
 237                 return ret;
 238
 239         if (tid >= IEEE80211_NUM_TIDS)
 240                 return -EINVAL;
 241
 242         if (tx) {
 243                 if (start)
 244                         ret = ieee80211_start_tx_ba_session(&sta->sta, tid, 5000);
 245                 else
 246                         ret = ieee80211_stop_tx_ba_session(&sta->sta, tid);
 247         } else {
 248                 __ieee80211_stop_rx_ba_session(sta, tid, WLAN_BACK_RECIPIENT,
 249                                                3, true);
 250                 ret = 0;
 251         }
 252
 253         return ret ?: count;
 254 }
 255 STA_OPS_RW(agg_status);
 256
 257 static ssize_t sta_ht_capa_read(struct file *file, char __user *userbuf,
 258                                 size_t count, loff_t *ppos)
 259 {
 260 #define PRINT_HT_CAP(_cond, _str) \
 261         do { \
 262         if (_cond) \
 263                         p += scnprintf(p, sizeof(buf)+buf-p, "\t" _str "\n"); \
 264         } while (0)
 265         char buf[512], *p = buf;
 266         int i;
 267         struct sta_info *sta = file->private_data;
 268         struct ieee80211_sta_ht_cap *htc = &sta->sta.ht_cap;
 269
 270         p += scnprintf(p, sizeof(buf) + buf - p, "ht %ssupported\n",
 271                         htc->ht_supported ? "" : "not ");
 272         if (htc->ht_supported) {
 273                 p += scnprintf(p, sizeof(buf)+buf-p, "cap: %#.4x\n", htc->cap);
 274
 275                 PRINT_HT_CAP((htc->cap & BIT(0)), "RX LDPC");
 276                 PRINT_HT_CAP((htc->cap & BIT(1)), "HT20/HT40");
 277                 PRINT_HT_CAP(!(htc->cap & BIT(1)), "HT20");
 278
 279                 PRINT_HT_CAP(((htc->cap >> 2) & 0x3) == 0, "Static SM Power Save");
 280                 PRINT_HT_CAP(((htc->cap >> 2) & 0x3) == 1, "Dynamic SM Power Save");
 281                 PRINT_HT_CAP(((htc->cap >> 2) & 0x3) == 3, "SM Power Save disabled");
 282
 283                 PRINT_HT_CAP((htc->cap & BIT(4)), "RX Greenfield");
 284                 PRINT_HT_CAP((htc->cap & BIT(5)), "RX HT20 SGI");
 285                 PRINT_HT_CAP((htc->cap & BIT(6)), "RX HT40 SGI");
 286                 PRINT_HT_CAP((htc->cap & BIT(7)), "TX STBC");
 287
 288                 PRINT_HT_CAP(((htc->cap >> 8) & 0x3) == 0, "No RX STBC");
 289                 PRINT_HT_CAP(((htc->cap >> 8) & 0x3) == 1, "RX STBC 1-stream");
 290                 PRINT_HT_CAP(((htc->cap >> 8) & 0x3) == 2, "RX STBC 2-streams");
 291                 PRINT_HT_CAP(((htc->cap >> 8) & 0x3) == 3, "RX STBC 3-streams");
 292
 293                 PRINT_HT_CAP((htc->cap & BIT(10)), "HT Delayed Block Ack");
 294
 295                 PRINT_HT_CAP(!(htc->cap & BIT(11)), "Max AMSDU length: "
 296                              "3839 bytes");
 297                 PRINT_HT_CAP((htc->cap & BIT(11)), "Max AMSDU length: "
 298                              "7935 bytes");
 299
 300                 /*
 301                  * For beacons and probe response this would mean the BSS
 302                  * does or does not allow the usage of DSSS/CCK HT40.
 303                  * Otherwise it means the STA does or does not use
 304                  * DSSS/CCK HT40.
 305                  */
 306                 PRINT_HT_CAP((htc->cap & BIT(12)), "DSSS/CCK HT40");
 307                 PRINT_HT_CAP(!(htc->cap & BIT(12)), "No DSSS/CCK HT40");
 308
 309                 /* BIT(13) is reserved */
 310
 311                 PRINT_HT_CAP((htc->cap & BIT(14)), "40 MHz Intolerant");
 312
 313                 PRINT_HT_CAP((htc->cap & BIT(15)), "L-SIG TXOP protection");
 314
 315                 p += scnprintf(p, sizeof(buf)+buf-p, "ampdu factor/density: %d/%d\n",
 316                                 htc->ampdu_factor, htc->ampdu_density);
 317                 p += scnprintf(p, sizeof(buf)+buf-p, "MCS mask:");
 318
 319                 for (i = 0; i < IEEE80211_HT_MCS_MASK_LEN; i++)
 320                         p += scnprintf(p, sizeof(buf)+buf-p, " %.2x",
 321                                         htc->mcs.rx_mask[i]);
 322                 p += scnprintf(p, sizeof(buf)+buf-p, "\n");
 323
 324                 /* If not set this is meaningless */
 325                 if (le16_to_cpu(htc->mcs.rx_highest)) {
 326                         p += scnprintf(p, sizeof(buf)+buf-p,
 327                                        "MCS rx highest: %d Mbps\n",
 328                                        le16_to_cpu(htc->mcs.rx_highest));
 329                 }
 330
 331                 p += scnprintf(p, sizeof(buf)+buf-p, "MCS tx params: %x\n",
 332                                 htc->mcs.tx_params);
 333         }
 334
 335         return simple_read_from_buffer(userbuf, count, ppos, buf, p - buf);
 336 }
 337 STA_OPS(ht_capa);
 338
 339 static ssize_t sta_vht_capa_read(struct file *file, char __user *userbuf,
 340                                  size_t count, loff_t *ppos)
 341 {
 342         char buf[128], *p = buf;
 343         struct sta_info *sta = file->private_data;
 344         struct ieee80211_sta_vht_cap *vhtc = &sta->sta.vht_cap;
 345
 346         p += scnprintf(p, sizeof(buf) + buf - p, "VHT %ssupported\n",
 347                         vhtc->vht_supported ? "" : "not ");
 348         if (vhtc->vht_supported) {
 349                 p += scnprintf(p, sizeof(buf)+buf-p, "cap: %#.8x\n", vhtc->cap);
 350
 351                 p += scnprintf(p, sizeof(buf)+buf-p, "RX MCS: %.4x\n",
 352                                le16_to_cpu(vhtc->vht_mcs.rx_mcs_map));
 353                 if (vhtc->vht_mcs.rx_highest)
 354                         p += scnprintf(p, sizeof(buf)+buf-p,
 355                                        "MCS RX highest: %d Mbps\n",
 356                                        le16_to_cpu(vhtc->vht_mcs.rx_highest));
 357                 p += scnprintf(p, sizeof(buf)+buf-p, "TX MCS: %.4x\n",
 358                                le16_to_cpu(vhtc->vht_mcs.tx_mcs_map));
 359                 if (vhtc->vht_mcs.tx_highest)
 360                         p += scnprintf(p, sizeof(buf)+buf-p,
 361                                        "MCS TX highest: %d Mbps\n",
 362                                        le16_to_cpu(vhtc->vht_mcs.tx_highest));
 363         }
 364
 365         return simple_read_from_buffer(userbuf, count, ppos, buf, p - buf);
 366 }
 367 STA_OPS(vht_capa);
 368
 369 static ssize_t sta_current_tx_rate_read(struct file *file, char __user *userbuf,
 370                                         size_t count, loff_t *ppos)
 371 {
 372         struct sta_info *sta = file->private_data;
 373         struct rate_info rinfo;
 374         u16 rate;
 375         sta_set_rate_info_tx(sta, &sta->last_tx_rate, &rinfo);
 376         rate = cfg80211_calculate_bitrate(&rinfo);
 377
 378         return mac80211_format_buffer(userbuf, count, ppos,
 379                                       "%d.%d MBit/s\n",
 380                                       rate/10, rate%10);
 381 }
 382 STA_OPS(current_tx_rate);
 383
 384 static ssize_t sta_last_rx_rate_read(struct file *file, char __user *userbuf,
 385                                      size_t count, loff_t *ppos)
 386 {
 387         struct sta_info *sta = file->private_data;
 388         struct rate_info rinfo;
 389         u16 rate;
 390
 391         sta_set_rate_info_rx(sta, &rinfo);
 392
 393         rate = cfg80211_calculate_bitrate(&rinfo);
 394
 395         return mac80211_format_buffer(userbuf, count, ppos,
 396                                       "%d.%d MBit/s\n",
 397                                       rate/10, rate%10);
 398 }
 399 STA_OPS(last_rx_rate);
 400
 401 static int
 402 sta_tx_latency_stat_header(struct ieee80211_tx_latency_bin_ranges *tx_latency,
 403                            char *buf, int pos, int bufsz)
 404 {
 405         int i;
 406         int range_count = tx_latency->n_ranges;
 407         u32 *bin_ranges = tx_latency->ranges;
 408
 409         pos += scnprintf(buf + pos, bufsz - pos,
 410                           "Station\t\t\tTID\tMax\tAvg");
 411         if (range_count) {
 412                 pos += scnprintf(buf + pos, bufsz - pos,
 413                                   "\t<=%d", bin_ranges[0]);
 414                 for (i = 0; i < range_count - 1; i++)
 415                         pos += scnprintf(buf + pos, bufsz - pos, "\t%d-%d",
 416                                           bin_ranges[i], bin_ranges[i+1]);
 417                 pos += scnprintf(buf + pos, bufsz - pos,
 418                                   "\t%d<", bin_ranges[range_count - 1]);
 419         }
 420
 421         pos += scnprintf(buf + pos, bufsz - pos, "\n");
 422
 423         return pos;
 424 }
 425
 426 static int
 427 sta_tx_latency_stat_table(struct ieee80211_tx_latency_bin_ranges *tx_lat_range,
 428                           struct ieee80211_tx_latency_stat *tx_lat,
 429                           char *buf, int pos, int bufsz, int tid)
 430 {
 431         u32 avg = 0;
 432         int j;
 433         int bin_count = tx_lat->bin_count;
 434
 435         pos += scnprintf(buf + pos, bufsz - pos, "\t\t\t%d", tid);
 436         /* make sure you don't divide in 0 */
 437         if (tx_lat->counter)
 438                 avg = tx_lat->sum / tx_lat->counter;
 439
 440         pos += scnprintf(buf + pos, bufsz - pos, "\t%d\t%d",
 441                           tx_lat->max, avg);
 442
 443         if (tx_lat_range->n_ranges && tx_lat->bins)
 444                 for (j = 0; j < bin_count; j++)
 445                         pos += scnprintf(buf + pos, bufsz - pos,
 446                                           "\t%d", tx_lat->bins[j]);
 447         pos += scnprintf(buf + pos, bufsz - pos, "\n");
 448
 449         return pos;
 450 }
 451
 452 /*
 453  * Output Tx latency statistics station && restart all statistics information
 454  */
 455 static ssize_t sta_tx_latency_stat_read(struct file *file,
 456                                         char __user *userbuf,
 457                                         size_t count, loff_t *ppos)
 458 {
 459         struct sta_info *sta = file->private_data;
 460         struct ieee80211_local *local = sta->local;
 461         struct ieee80211_tx_latency_bin_ranges *tx_latency;
 462         char *buf;
 463         int bufsz, ret, i;
 464         int pos = 0;
 465
 466         bufsz = 20 * IEEE80211_NUM_TIDS *
 467                 sizeof(struct ieee80211_tx_latency_stat);
 468         buf = kzalloc(bufsz, GFP_KERNEL);
 469         if (!buf)
 470                 return -ENOMEM;
 471
 472         rcu_read_lock();
 473
 474         tx_latency = rcu_dereference(local->tx_latency);
 475
 476         if (!sta->tx_lat) {
 477                 pos += scnprintf(buf + pos, bufsz - pos,
 478                                  "Tx latency statistics are not enabled\n");
 479                 goto unlock;
 480         }
 481
 482         pos = sta_tx_latency_stat_header(tx_latency, buf, pos, bufsz);
 483
 484         pos += scnprintf(buf + pos, bufsz - pos, "%pM\n", sta->sta.addr);
 485         for (i = 0; i < IEEE80211_NUM_TIDS; i++)
 486                 pos = sta_tx_latency_stat_table(tx_latency, &sta->tx_lat[i],
 487                                                 buf, pos, bufsz, i);
 488 unlock:
 489         rcu_read_unlock();
 490
 491         ret = simple_read_from_buffer(userbuf, count, ppos, buf, pos);
 492         kfree(buf);
 493
 494         return ret;
 495 }
 496 STA_OPS(tx_latency_stat);
 497
 498 static ssize_t sta_tx_latency_stat_reset_write(struct file *file,
 499                                                const char __user *userbuf,
 500                                                size_t count, loff_t *ppos)
 501 {
 502         u32 *bins;
 503         int bin_count;
 504         struct sta_info *sta = file->private_data;
 505         int i;
 506
 507         if (!sta->tx_lat)
 508                 return -EINVAL;
 509
 510         for (i = 0; i < IEEE80211_NUM_TIDS; i++) {
 511                 bins = sta->tx_lat[i].bins;
 512                 bin_count = sta->tx_lat[i].bin_count;
 513
 514                 sta->tx_lat[i].max = 0;
 515                 sta->tx_lat[i].sum = 0;
 516                 sta->tx_lat[i].counter = 0;
 517
 518                 if (bin_count)
 519                         memset(bins, 0, bin_count * sizeof(u32));
 520         }
 521
 522         return count;
 523 }
 524 STA_OPS_W(tx_latency_stat_reset);
 525
 526 #define DEBUGFS_ADD(name) \
 527         debugfs_create_file(#name, 0400, \
 528                 sta->debugfs.dir, sta, &sta_ ##name## _ops);
 529
 530 #define DEBUGFS_ADD_COUNTER(name, field)                                \
 531         if (sizeof(sta->field) == sizeof(u32))                          \
 532                 debugfs_create_u32(#name, 0400, sta->debugfs.dir,       \
 533                         (u32 *) &sta->field);                           \
 534         else                                                            \
 535                 debugfs_create_u64(#name, 0400, sta->debugfs.dir,       \
 536                         (u64 *) &sta->field);
 537
 538 void ieee80211_sta_debugfs_add(struct sta_info *sta)
 539 {
 540         struct ieee80211_local *local = sta->local;
 541         struct ieee80211_sub_if_data *sdata = sta->sdata;
 542         struct dentry *stations_dir = sta->sdata->debugfs.subdir_stations;
 543         u8 mac[3*ETH_ALEN];
 544
 545         sta->debugfs.add_has_run = true;
 546
 547         if (!stations_dir)
 548                 return;
 549
 550         snprintf(mac, sizeof(mac), "%pM", sta->sta.addr);
 551
 552         /*
 553          * This might fail due to a race condition:
 554          * When mac80211 unlinks a station, the debugfs entries
 555          * remain, but it is already possible to link a new
 556          * station with the same address which triggers adding
 557          * it to debugfs; therefore, if the old station isn't
 558          * destroyed quickly enough the old station's debugfs
 559          * dir might still be around.
 560          */
 561         sta->debugfs.dir = debugfs_create_dir(mac, stations_dir);
 562         if (!sta->debugfs.dir)
 563                 return;
 564
 565         DEBUGFS_ADD(flags);
 566         DEBUGFS_ADD(num_ps_buf_frames);
 567         DEBUGFS_ADD(inactive_ms);
 568         DEBUGFS_ADD(connected_time);
 569         DEBUGFS_ADD(last_seq_ctrl);
 570         DEBUGFS_ADD(agg_status);
 571         DEBUGFS_ADD(dev);
 572         DEBUGFS_ADD(last_signal);
 573         DEBUGFS_ADD(beacon_loss_count);
 574         DEBUGFS_ADD(ht_capa);
 575         DEBUGFS_ADD(vht_capa);
 576         DEBUGFS_ADD(last_ack_signal);
 577         DEBUGFS_ADD(current_tx_rate);
 578         DEBUGFS_ADD(last_rx_rate);
 579         DEBUGFS_ADD(tx_latency_stat);
 580         DEBUGFS_ADD(tx_latency_stat_reset);
 581
 582         DEBUGFS_ADD_COUNTER(rx_packets, rx_packets);
 583         DEBUGFS_ADD_COUNTER(tx_packets, tx_packets);
 584         DEBUGFS_ADD_COUNTER(rx_bytes, rx_bytes);
 585         DEBUGFS_ADD_COUNTER(tx_bytes, tx_bytes);
 586         DEBUGFS_ADD_COUNTER(rx_duplicates, num_duplicates);
 587         DEBUGFS_ADD_COUNTER(rx_fragments, rx_fragments);
 588         DEBUGFS_ADD_COUNTER(rx_dropped, rx_dropped);
 589         DEBUGFS_ADD_COUNTER(tx_fragments, tx_fragments);
 590         DEBUGFS_ADD_COUNTER(tx_filtered, tx_filtered_count);
 591         DEBUGFS_ADD_COUNTER(tx_retry_failed, tx_retry_failed);
 592         DEBUGFS_ADD_COUNTER(tx_retry_count, tx_retry_count);
 593
 594         if (sizeof(sta->driver_buffered_tids) == sizeof(u32))
 595                 debugfs_create_x32("driver_buffered_tids", 0400,
 596                                    sta->debugfs.dir,
 597                                    (u32 *)&sta->driver_buffered_tids);
 598         else
 599                 debugfs_create_x64("driver_buffered_tids", 0400,
 600                                    sta->debugfs.dir,
 601                                    (u64 *)&sta->driver_buffered_tids);
 602
 603         drv_sta_add_debugfs(local, sdata, &sta->sta, sta->debugfs.dir);
 604 }
 605
 606 void ieee80211_sta_debugfs_remove(struct sta_info *sta)
 607 {
 608         struct ieee80211_local *local = sta->local;
 609         struct ieee80211_sub_if_data *sdata = sta->sdata;
 610
 611         drv_sta_remove_debugfs(local, sdata, &sta->sta, sta->debugfs.dir);
 612         debugfs_remove_recursive(sta->debugfs.dir);
 613         sta->debugfs.dir = NULL;
 614 }