kernel/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_RW(name)                                                \
  43 static const struct file_operations sta_ ##name## _ops = {              \
  44         .read = sta_##name##_read,                                      \
  45         .write = sta_##name##_write,                                    \
  46         .open = simple_open,                                            \
  47         .llseek = generic_file_llseek,                                  \
  48 }
  49
  50 #define STA_FILE(name, field, format)                                   \
  51                 STA_READ_##format(name, field)                          \
  52                 STA_OPS(name)
  53
  54 STA_FILE(aid, sta.aid, D);
  55 STA_FILE(dev, sdata->name, S);
  56 STA_FILE(last_signal, last_signal, D);
  57 STA_FILE(last_ack_signal, last_ack_signal, D);
  58 STA_FILE(beacon_loss_count, beacon_loss_count, D);
  59
  60 static ssize_t sta_flags_read(struct file *file, char __user *userbuf,
  61                               size_t count, loff_t *ppos)
  62 {
  63         char buf[121];
  64         struct sta_info *sta = file->private_data;
  65
  66 #define TEST(flg) \
  67         test_sta_flag(sta, WLAN_STA_##flg) ? #flg "\n" : ""
  68
  69         int res = scnprintf(buf, sizeof(buf),
  70                             "%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",
  71                             TEST(AUTH), TEST(ASSOC), TEST(PS_STA),
  72                             TEST(PS_DRIVER), TEST(AUTHORIZED),
  73                             TEST(SHORT_PREAMBLE),
  74                             sta->sta.wme ? "WME\n" : "",
  75                             TEST(WDS), TEST(CLEAR_PS_FILT),
  76                             TEST(MFP), TEST(BLOCK_BA), TEST(PSPOLL),
  77                             TEST(UAPSD), TEST(SP), TEST(TDLS_PEER),
  78                             TEST(TDLS_PEER_AUTH), TEST(TDLS_INITIATOR),
  79                             TEST(TDLS_CHAN_SWITCH), TEST(TDLS_OFF_CHANNEL),
  80                             TEST(4ADDR_EVENT), TEST(INSERTED),
  81                             TEST(RATE_CONTROL), TEST(TOFFSET_KNOWN),
  82                             TEST(MPSP_OWNER), TEST(MPSP_RECIPIENT));
  83 #undef TEST
  84         return simple_read_from_buffer(userbuf, count, ppos, buf, res);
  85 }
  86 STA_OPS(flags);
  87
  88 static ssize_t sta_num_ps_buf_frames_read(struct file *file,
  89                                           char __user *userbuf,
  90                                           size_t count, loff_t *ppos)
  91 {
  92         struct sta_info *sta = file->private_data;
  93         char buf[17*IEEE80211_NUM_ACS], *p = buf;
  94         int ac;
  95
  96         for (ac = 0; ac < IEEE80211_NUM_ACS; ac++)
  97                 p += scnprintf(p, sizeof(buf)+buf-p, "AC%d: %d\n", ac,
  98                                skb_queue_len(&sta->ps_tx_buf[ac]) +
  99                                skb_queue_len(&sta->tx_filtered[ac]));
 100         return simple_read_from_buffer(userbuf, count, ppos, buf, p - buf);
 101 }
 102 STA_OPS(num_ps_buf_frames);
 103
 104 static ssize_t sta_inactive_ms_read(struct file *file, char __user *userbuf,
 105                                     size_t count, loff_t *ppos)
 106 {
 107         struct sta_info *sta = file->private_data;
 108         return mac80211_format_buffer(userbuf, count, ppos, "%d\n",
 109                                       jiffies_to_msecs(jiffies - sta->last_rx));
 110 }
 111 STA_OPS(inactive_ms);
 112
 113
 114 static ssize_t sta_connected_time_read(struct file *file, char __user *userbuf,
 115                                         size_t count, loff_t *ppos)
 116 {
 117         struct sta_info *sta = file->private_data;
 118         struct timespec uptime;
 119         struct tm result;
 120         long connected_time_secs;
 121         char buf[100];
 122         int res;
 123         ktime_get_ts(&uptime);
 124         connected_time_secs = uptime.tv_sec - sta->last_connected;
 125         time_to_tm(connected_time_secs, 0, &result);
 126         result.tm_year -= 70;
 127         result.tm_mday -= 1;
 128         res = scnprintf(buf, sizeof(buf),
 129                 "years  - %ld\nmonths - %d\ndays   - %d\nclock  - %d:%d:%d\n\n",
 130                         result.tm_year, result.tm_mon, result.tm_mday,
 131                         result.tm_hour, result.tm_min, result.tm_sec);
 132         return simple_read_from_buffer(userbuf, count, ppos, buf, res);
 133 }
 134 STA_OPS(connected_time);
 135
 136
 137
 138 static ssize_t sta_last_seq_ctrl_read(struct file *file, char __user *userbuf,
 139                                       size_t count, loff_t *ppos)
 140 {
 141         char buf[15*IEEE80211_NUM_TIDS], *p = buf;
 142         int i;
 143         struct sta_info *sta = file->private_data;
 144         for (i = 0; i < IEEE80211_NUM_TIDS; i++)
 145                 p += scnprintf(p, sizeof(buf)+buf-p, "%x ",
 146                                le16_to_cpu(sta->last_seq_ctrl[i]));
 147         p += scnprintf(p, sizeof(buf)+buf-p, "\n");
 148         return simple_read_from_buffer(userbuf, count, ppos, buf, p - buf);
 149 }
 150 STA_OPS(last_seq_ctrl);
 151
 152 static ssize_t sta_agg_status_read(struct file *file, char __user *userbuf,
 153                                         size_t count, loff_t *ppos)
 154 {
 155         char buf[71 + IEEE80211_NUM_TIDS * 40], *p = buf;
 156         int i;
 157         struct sta_info *sta = file->private_data;
 158         struct tid_ampdu_rx *tid_rx;
 159         struct tid_ampdu_tx *tid_tx;
 160
 161         rcu_read_lock();
 162
 163         p += scnprintf(p, sizeof(buf) + buf - p, "next dialog_token: %#02x\n",
 164                         sta->ampdu_mlme.dialog_token_allocator + 1);
 165         p += scnprintf(p, sizeof(buf) + buf - p,
 166                        "TID\t\tRX\tDTKN\tSSN\t\tTX\tDTKN\tpending\n");
 167
 168         for (i = 0; i < IEEE80211_NUM_TIDS; i++) {
 169                 tid_rx = rcu_dereference(sta->ampdu_mlme.tid_rx[i]);
 170                 tid_tx = rcu_dereference(sta->ampdu_mlme.tid_tx[i]);
 171
 172                 p += scnprintf(p, sizeof(buf) + buf - p, "%02d", i);
 173                 p += scnprintf(p, sizeof(buf) + buf - p, "\t\t%x", !!tid_rx);
 174                 p += scnprintf(p, sizeof(buf) + buf - p, "\t%#.2x",
 175                                 tid_rx ? tid_rx->dialog_token : 0);
 176                 p += scnprintf(p, sizeof(buf) + buf - p, "\t%#.3x",
 177                                 tid_rx ? tid_rx->ssn : 0);
 178
 179                 p += scnprintf(p, sizeof(buf) + buf - p, "\t\t%x", !!tid_tx);
 180                 p += scnprintf(p, sizeof(buf) + buf - p, "\t%#.2x",
 181                                 tid_tx ? tid_tx->dialog_token : 0);
 182                 p += scnprintf(p, sizeof(buf) + buf - p, "\t%03d",
 183                                 tid_tx ? skb_queue_len(&tid_tx->pending) : 0);
 184                 p += scnprintf(p, sizeof(buf) + buf - p, "\n");
 185         }
 186         rcu_read_unlock();
 187
 188         return simple_read_from_buffer(userbuf, count, ppos, buf, p - buf);
 189 }
 190
 191 static ssize_t sta_agg_status_write(struct file *file, const char __user *userbuf,
 192                                     size_t count, loff_t *ppos)
 193 {
 194         char _buf[12] = {}, *buf = _buf;
 195         struct sta_info *sta = file->private_data;
 196         bool start, tx;
 197         unsigned long tid;
 198         int ret;
 199
 200         if (count > sizeof(_buf))
 201                 return -EINVAL;
 202
 203         if (copy_from_user(buf, userbuf, count))
 204                 return -EFAULT;
 205
 206         buf[sizeof(_buf) - 1] = '\0';
 207
 208         if (strncmp(buf, "tx ", 3) == 0) {
 209                 buf += 3;
 210                 tx = true;
 211         } else if (strncmp(buf, "rx ", 3) == 0) {
 212                 buf += 3;
 213                 tx = false;
 214         } else
 215                 return -EINVAL;
 216
 217         if (strncmp(buf, "start ", 6) == 0) {
 218                 buf += 6;
 219                 start = true;
 220                 if (!tx)
 221                         return -EINVAL;
 222         } else if (strncmp(buf, "stop ", 5) == 0) {
 223                 buf += 5;
 224                 start = false;
 225         } else
 226                 return -EINVAL;
 227
 228         ret = kstrtoul(buf, 0, &tid);
 229         if (ret)
 230                 return ret;
 231
 232         if (tid >= IEEE80211_NUM_TIDS)
 233                 return -EINVAL;
 234
 235         if (tx) {
 236                 if (start)
 237                         ret = ieee80211_start_tx_ba_session(&sta->sta, tid, 5000);
 238                 else
 239                         ret = ieee80211_stop_tx_ba_session(&sta->sta, tid);
 240         } else {
 241                 __ieee80211_stop_rx_ba_session(sta, tid, WLAN_BACK_RECIPIENT,
 242                                                3, true);
 243                 ret = 0;
 244         }
 245
 246         return ret ?: count;
 247 }
 248 STA_OPS_RW(agg_status);
 249
 250 static ssize_t sta_ht_capa_read(struct file *file, char __user *userbuf,
 251                                 size_t count, loff_t *ppos)
 252 {
 253 #define PRINT_HT_CAP(_cond, _str) \
 254         do { \
 255         if (_cond) \
 256                         p += scnprintf(p, sizeof(buf)+buf-p, "\t" _str "\n"); \
 257         } while (0)
 258         char buf[512], *p = buf;
 259         int i;
 260         struct sta_info *sta = file->private_data;
 261         struct ieee80211_sta_ht_cap *htc = &sta->sta.ht_cap;
 262
 263         p += scnprintf(p, sizeof(buf) + buf - p, "ht %ssupported\n",
 264                         htc->ht_supported ? "" : "not ");
 265         if (htc->ht_supported) {
 266                 p += scnprintf(p, sizeof(buf)+buf-p, "cap: %#.4x\n", htc->cap);
 267
 268                 PRINT_HT_CAP((htc->cap & BIT(0)), "RX LDPC");
 269                 PRINT_HT_CAP((htc->cap & BIT(1)), "HT20/HT40");
 270                 PRINT_HT_CAP(!(htc->cap & BIT(1)), "HT20");
 271
 272                 PRINT_HT_CAP(((htc->cap >> 2) & 0x3) == 0, "Static SM Power Save");
 273                 PRINT_HT_CAP(((htc->cap >> 2) & 0x3) == 1, "Dynamic SM Power Save");
 274                 PRINT_HT_CAP(((htc->cap >> 2) & 0x3) == 3, "SM Power Save disabled");
 275
 276                 PRINT_HT_CAP((htc->cap & BIT(4)), "RX Greenfield");
 277                 PRINT_HT_CAP((htc->cap & BIT(5)), "RX HT20 SGI");
 278                 PRINT_HT_CAP((htc->cap & BIT(6)), "RX HT40 SGI");
 279                 PRINT_HT_CAP((htc->cap & BIT(7)), "TX STBC");
 280
 281                 PRINT_HT_CAP(((htc->cap >> 8) & 0x3) == 0, "No RX STBC");
 282                 PRINT_HT_CAP(((htc->cap >> 8) & 0x3) == 1, "RX STBC 1-stream");
 283                 PRINT_HT_CAP(((htc->cap >> 8) & 0x3) == 2, "RX STBC 2-streams");
 284                 PRINT_HT_CAP(((htc->cap >> 8) & 0x3) == 3, "RX STBC 3-streams");
 285
 286                 PRINT_HT_CAP((htc->cap & BIT(10)), "HT Delayed Block Ack");
 287
 288                 PRINT_HT_CAP(!(htc->cap & BIT(11)), "Max AMSDU length: "
 289                              "3839 bytes");
 290                 PRINT_HT_CAP((htc->cap & BIT(11)), "Max AMSDU length: "
 291                              "7935 bytes");
 292
 293                 /*
 294                  * For beacons and probe response this would mean the BSS
 295                  * does or does not allow the usage of DSSS/CCK HT40.
 296                  * Otherwise it means the STA does or does not use
 297                  * DSSS/CCK HT40.
 298                  */
 299                 PRINT_HT_CAP((htc->cap & BIT(12)), "DSSS/CCK HT40");
 300                 PRINT_HT_CAP(!(htc->cap & BIT(12)), "No DSSS/CCK HT40");
 301
 302                 /* BIT(13) is reserved */
 303
 304                 PRINT_HT_CAP((htc->cap & BIT(14)), "40 MHz Intolerant");
 305
 306                 PRINT_HT_CAP((htc->cap & BIT(15)), "L-SIG TXOP protection");
 307
 308                 p += scnprintf(p, sizeof(buf)+buf-p, "ampdu factor/density: %d/%d\n",
 309                                 htc->ampdu_factor, htc->ampdu_density);
 310                 p += scnprintf(p, sizeof(buf)+buf-p, "MCS mask:");
 311
 312                 for (i = 0; i < IEEE80211_HT_MCS_MASK_LEN; i++)
 313                         p += scnprintf(p, sizeof(buf)+buf-p, " %.2x",
 314                                         htc->mcs.rx_mask[i]);
 315                 p += scnprintf(p, sizeof(buf)+buf-p, "\n");
 316
 317                 /* If not set this is meaningless */
 318                 if (le16_to_cpu(htc->mcs.rx_highest)) {
 319                         p += scnprintf(p, sizeof(buf)+buf-p,
 320                                        "MCS rx highest: %d Mbps\n",
 321                                        le16_to_cpu(htc->mcs.rx_highest));
 322                 }
 323
 324                 p += scnprintf(p, sizeof(buf)+buf-p, "MCS tx params: %x\n",
 325                                 htc->mcs.tx_params);
 326         }
 327
 328         return simple_read_from_buffer(userbuf, count, ppos, buf, p - buf);
 329 }
 330 STA_OPS(ht_capa);
 331
 332 static ssize_t sta_vht_capa_read(struct file *file, char __user *userbuf,
 333                                  size_t count, loff_t *ppos)
 334 {
 335         char buf[128], *p = buf;
 336         struct sta_info *sta = file->private_data;
 337         struct ieee80211_sta_vht_cap *vhtc = &sta->sta.vht_cap;
 338
 339         p += scnprintf(p, sizeof(buf) + buf - p, "VHT %ssupported\n",
 340                         vhtc->vht_supported ? "" : "not ");
 341         if (vhtc->vht_supported) {
 342                 p += scnprintf(p, sizeof(buf)+buf-p, "cap: %#.8x\n", vhtc->cap);
 343
 344                 p += scnprintf(p, sizeof(buf)+buf-p, "RX MCS: %.4x\n",
 345                                le16_to_cpu(vhtc->vht_mcs.rx_mcs_map));
 346                 if (vhtc->vht_mcs.rx_highest)
 347                         p += scnprintf(p, sizeof(buf)+buf-p,
 348                                        "MCS RX highest: %d Mbps\n",
 349                                        le16_to_cpu(vhtc->vht_mcs.rx_highest));
 350                 p += scnprintf(p, sizeof(buf)+buf-p, "TX MCS: %.4x\n",
 351                                le16_to_cpu(vhtc->vht_mcs.tx_mcs_map));
 352                 if (vhtc->vht_mcs.tx_highest)
 353                         p += scnprintf(p, sizeof(buf)+buf-p,
 354                                        "MCS TX highest: %d Mbps\n",
 355                                        le16_to_cpu(vhtc->vht_mcs.tx_highest));
 356         }
 357
 358         return simple_read_from_buffer(userbuf, count, ppos, buf, p - buf);
 359 }
 360 STA_OPS(vht_capa);
 361
 362 static ssize_t sta_current_tx_rate_read(struct file *file, char __user *userbuf,
 363                                         size_t count, loff_t *ppos)
 364 {
 365         struct sta_info *sta = file->private_data;
 366         struct rate_info rinfo;
 367         u16 rate;
 368         sta_set_rate_info_tx(sta, &sta->last_tx_rate, &rinfo);
 369         rate = cfg80211_calculate_bitrate(&rinfo);
 370
 371         return mac80211_format_buffer(userbuf, count, ppos,
 372                                       "%d.%d MBit/s\n",
 373                                       rate/10, rate%10);
 374 }
 375 STA_OPS(current_tx_rate);
 376
 377 static ssize_t sta_last_rx_rate_read(struct file *file, char __user *userbuf,
 378                                      size_t count, loff_t *ppos)
 379 {
 380         struct sta_info *sta = file->private_data;
 381         struct rate_info rinfo;
 382         u16 rate;
 383
 384         sta_set_rate_info_rx(sta, &rinfo);
 385
 386         rate = cfg80211_calculate_bitrate(&rinfo);
 387
 388         return mac80211_format_buffer(userbuf, count, ppos,
 389                                       "%d.%d MBit/s\n",
 390                                       rate/10, rate%10);
 391 }
 392 STA_OPS(last_rx_rate);
 393
 394 #define DEBUGFS_ADD(name) \
 395         debugfs_create_file(#name, 0400, \
 396                 sta->debugfs.dir, sta, &sta_ ##name## _ops);
 397
 398 #define DEBUGFS_ADD_COUNTER(name, field)                                \
 399         if (sizeof(sta->field) == sizeof(u32))                          \
 400                 debugfs_create_u32(#name, 0400, sta->debugfs.dir,       \
 401                         (u32 *) &sta->field);                           \
 402         else                                                            \
 403                 debugfs_create_u64(#name, 0400, sta->debugfs.dir,       \
 404                         (u64 *) &sta->field);
 405
 406 void ieee80211_sta_debugfs_add(struct sta_info *sta)
 407 {
 408         struct ieee80211_local *local = sta->local;
 409         struct ieee80211_sub_if_data *sdata = sta->sdata;
 410         struct dentry *stations_dir = sta->sdata->debugfs.subdir_stations;
 411         u8 mac[3*ETH_ALEN];
 412
 413         sta->debugfs.add_has_run = true;
 414
 415         if (!stations_dir)
 416                 return;
 417
 418         snprintf(mac, sizeof(mac), "%pM", sta->sta.addr);
 419
 420         /*
 421          * This might fail due to a race condition:
 422          * When mac80211 unlinks a station, the debugfs entries
 423          * remain, but it is already possible to link a new
 424          * station with the same address which triggers adding
 425          * it to debugfs; therefore, if the old station isn't
 426          * destroyed quickly enough the old station's debugfs
 427          * dir might still be around.
 428          */
 429         sta->debugfs.dir = debugfs_create_dir(mac, stations_dir);
 430         if (!sta->debugfs.dir)
 431                 return;
 432
 433         DEBUGFS_ADD(flags);
 434         DEBUGFS_ADD(num_ps_buf_frames);
 435         DEBUGFS_ADD(inactive_ms);
 436         DEBUGFS_ADD(connected_time);
 437         DEBUGFS_ADD(last_seq_ctrl);
 438         DEBUGFS_ADD(agg_status);
 439         DEBUGFS_ADD(dev);
 440         DEBUGFS_ADD(last_signal);
 441         DEBUGFS_ADD(beacon_loss_count);
 442         DEBUGFS_ADD(ht_capa);
 443         DEBUGFS_ADD(vht_capa);
 444         DEBUGFS_ADD(last_ack_signal);
 445         DEBUGFS_ADD(current_tx_rate);
 446         DEBUGFS_ADD(last_rx_rate);
 447
 448         DEBUGFS_ADD_COUNTER(rx_packets, rx_packets);
 449         DEBUGFS_ADD_COUNTER(tx_packets, tx_packets);
 450         DEBUGFS_ADD_COUNTER(rx_bytes, rx_bytes);
 451         DEBUGFS_ADD_COUNTER(tx_bytes, tx_bytes);
 452         DEBUGFS_ADD_COUNTER(rx_duplicates, num_duplicates);
 453         DEBUGFS_ADD_COUNTER(rx_fragments, rx_fragments);
 454         DEBUGFS_ADD_COUNTER(rx_dropped, rx_dropped);
 455         DEBUGFS_ADD_COUNTER(tx_fragments, tx_fragments);
 456         DEBUGFS_ADD_COUNTER(tx_filtered, tx_filtered_count);
 457         DEBUGFS_ADD_COUNTER(tx_retry_failed, tx_retry_failed);
 458         DEBUGFS_ADD_COUNTER(tx_retry_count, tx_retry_count);
 459
 460         if (sizeof(sta->driver_buffered_tids) == sizeof(u32))
 461                 debugfs_create_x32("driver_buffered_tids", 0400,
 462                                    sta->debugfs.dir,
 463                                    (u32 *)&sta->driver_buffered_tids);
 464         else
 465                 debugfs_create_x64("driver_buffered_tids", 0400,
 466                                    sta->debugfs.dir,
 467                                    (u64 *)&sta->driver_buffered_tids);
 468
 469         drv_sta_add_debugfs(local, sdata, &sta->sta, sta->debugfs.dir);
 470 }
 471
 472 void ieee80211_sta_debugfs_remove(struct sta_info *sta)
 473 {
 474         struct ieee80211_local *local = sta->local;
 475         struct ieee80211_sub_if_data *sdata = sta->sdata;
 476
 477         drv_sta_remove_debugfs(local, sdata, &sta->sta, sta->debugfs.dir);
 478         debugfs_remove_recursive(sta->debugfs.dir);
 479         sta->debugfs.dir = NULL;
 480 }