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