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  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License version 2 as
   8  * published by the Free Software Foundation.
   9  */
  10
  11 #include <linux/debugfs.h>
  12 #include <linux/ieee80211.h>
  13 #include "ieee80211_i.h"
  14 #include "debugfs.h"
  15 #include "debugfs_sta.h"
  16 #include "sta_info.h"
  17 #include "driver-ops.h"
  18
  19 /* sta attributtes */
  20
  21 #define STA_READ(name, field, format_string)                            \
  22 static ssize_t sta_ ##name## _read(struct file *file,                   \
  23                                    char __user *userbuf,                \
  24                                    size_t count, loff_t *ppos)          \
  25 {                                                                       \
  26         struct sta_info *sta = file->private_data;                      \
  27         return mac80211_format_buffer(userbuf, count, ppos,             \
  28                                       format_string, sta->field);       \
  29 }
  30 #define STA_READ_D(name, field) STA_READ(name, field, "%d\n")
  31 #define STA_READ_U(name, field) STA_READ(name, field, "%u\n")
  32 #define STA_READ_S(name, field) STA_READ(name, field, "%s\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 STA_FILE(dev, sdata->name, S);
  55 STA_FILE(last_signal, last_signal, D);
  56 STA_FILE(last_ack_signal, last_ack_signal, D);
  57 STA_FILE(beacon_loss_count, beacon_loss_count, D);
  58
  59 static ssize_t sta_flags_read(struct file *file, char __user *userbuf,
  60                               size_t count, loff_t *ppos)
  61 {
  62         char buf[121];
  63         struct sta_info *sta = file->private_data;
  64
  65 #define TEST(flg) \
  66         test_sta_flag(sta, WLAN_STA_##flg) ? #flg "\n" : ""
  67
  68         int res = scnprintf(buf, sizeof(buf),
  69                             "%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s",
  70                             TEST(AUTH), TEST(ASSOC), TEST(PS_STA),
  71                             TEST(PS_DRIVER), TEST(AUTHORIZED),
  72                             TEST(SHORT_PREAMBLE),
  73                             TEST(WME), TEST(WDS), TEST(CLEAR_PS_FILT),
  74                             TEST(MFP), TEST(BLOCK_BA), TEST(PSPOLL),
  75                             TEST(UAPSD), TEST(SP), TEST(TDLS_PEER),
  76                             TEST(TDLS_PEER_AUTH), TEST(4ADDR_EVENT),
  77                             TEST(INSERTED), TEST(RATE_CONTROL),
  78                             TEST(TOFFSET_KNOWN), TEST(MPSP_OWNER),
  79                             TEST(MPSP_RECIPIENT));
  80 #undef TEST
  81         return simple_read_from_buffer(userbuf, count, ppos, buf, res);
  82 }
  83 STA_OPS(flags);
  84
  85 static ssize_t sta_num_ps_buf_frames_read(struct file *file,
  86                                           char __user *userbuf,
  87                                           size_t count, loff_t *ppos)
  88 {
  89         struct sta_info *sta = file->private_data;
  90         char buf[17*IEEE80211_NUM_ACS], *p = buf;
  91         int ac;
  92
  93         for (ac = 0; ac < IEEE80211_NUM_ACS; ac++)
  94                 p += scnprintf(p, sizeof(buf)+buf-p, "AC%d: %d\n", ac,
  95                                skb_queue_len(&sta->ps_tx_buf[ac]) +
  96                                skb_queue_len(&sta->tx_filtered[ac]));
  97         return simple_read_from_buffer(userbuf, count, ppos, buf, p - buf);
  98 }
  99 STA_OPS(num_ps_buf_frames);
 100
 101 static ssize_t sta_inactive_ms_read(struct file *file, char __user *userbuf,
 102                                     size_t count, loff_t *ppos)
 103 {
 104         struct sta_info *sta = file->private_data;
 105         return mac80211_format_buffer(userbuf, count, ppos, "%d\n",
 106                                       jiffies_to_msecs(jiffies - sta->last_rx));
 107 }
 108 STA_OPS(inactive_ms);
 109
 110
 111 static ssize_t sta_connected_time_read(struct file *file, char __user *userbuf,
 112                                         size_t count, loff_t *ppos)
 113 {
 114         struct sta_info *sta = file->private_data;
 115         struct timespec uptime;
 116         struct tm result;
 117         long connected_time_secs;
 118         char buf[100];
 119         int res;
 120         do_posix_clock_monotonic_gettime(&uptime);
 121         connected_time_secs = uptime.tv_sec - sta->last_connected;
 122         time_to_tm(connected_time_secs, 0, &result);
 123         result.tm_year -= 70;
 124         result.tm_mday -= 1;
 125         res = scnprintf(buf, sizeof(buf),
 126                 "years  - %ld\nmonths - %d\ndays   - %d\nclock  - %d:%d:%d\n\n",
 127                         result.tm_year, result.tm_mon, result.tm_mday,
 128                         result.tm_hour, result.tm_min, result.tm_sec);
 129         return simple_read_from_buffer(userbuf, count, ppos, buf, res);
 130 }
 131 STA_OPS(connected_time);
 132
 133
 134
 135 static ssize_t sta_last_seq_ctrl_read(struct file *file, char __user *userbuf,
 136                                       size_t count, loff_t *ppos)
 137 {
 138         char buf[15*IEEE80211_NUM_TIDS], *p = buf;
 139         int i;
 140         struct sta_info *sta = file->private_data;
 141         for (i = 0; i < IEEE80211_NUM_TIDS; i++)
 142                 p += scnprintf(p, sizeof(buf)+buf-p, "%x ",
 143                                le16_to_cpu(sta->last_seq_ctrl[i]));
 144         p += scnprintf(p, sizeof(buf)+buf-p, "\n");
 145         return simple_read_from_buffer(userbuf, count, ppos, buf, p - buf);
 146 }
 147 STA_OPS(last_seq_ctrl);
 148
 149 static ssize_t sta_agg_status_read(struct file *file, char __user *userbuf,
 150                                         size_t count, loff_t *ppos)
 151 {
 152         char buf[71 + IEEE80211_NUM_TIDS * 40], *p = buf;
 153         int i;
 154         struct sta_info *sta = file->private_data;
 155         struct tid_ampdu_rx *tid_rx;
 156         struct tid_ampdu_tx *tid_tx;
 157
 158         rcu_read_lock();
 159
 160         p += scnprintf(p, sizeof(buf) + buf - p, "next dialog_token: %#02x\n",
 161                         sta->ampdu_mlme.dialog_token_allocator + 1);
 162         p += scnprintf(p, sizeof(buf) + buf - p,
 163                        "TID\t\tRX active\tDTKN\tSSN\t\tTX\tDTKN\tpending\n");
 164
 165         for (i = 0; i < IEEE80211_NUM_TIDS; i++) {
 166                 tid_rx = rcu_dereference(sta->ampdu_mlme.tid_rx[i]);
 167                 tid_tx = rcu_dereference(sta->ampdu_mlme.tid_tx[i]);
 168
 169                 p += scnprintf(p, sizeof(buf) + buf - p, "%02d", i);
 170                 p += scnprintf(p, sizeof(buf) + buf - p, "\t\t%x", !!tid_rx);
 171                 p += scnprintf(p, sizeof(buf) + buf - p, "\t%#.2x",
 172                                 tid_rx ? tid_rx->dialog_token : 0);
 173                 p += scnprintf(p, sizeof(buf) + buf - p, "\t%#.3x",
 174                                 tid_rx ? tid_rx->ssn : 0);
 175
 176                 p += scnprintf(p, sizeof(buf) + buf - p, "\t\t%x", !!tid_tx);
 177                 p += scnprintf(p, sizeof(buf) + buf - p, "\t%#.2x",
 178                                 tid_tx ? tid_tx->dialog_token : 0);
 179                 p += scnprintf(p, sizeof(buf) + buf - p, "\t%03d",
 180                                 tid_tx ? skb_queue_len(&tid_tx->pending) : 0);
 181                 p += scnprintf(p, sizeof(buf) + buf - p, "\n");
 182         }
 183         rcu_read_unlock();
 184
 185         return simple_read_from_buffer(userbuf, count, ppos, buf, p - buf);
 186 }
 187
 188 static ssize_t sta_agg_status_write(struct file *file, const char __user *userbuf,
 189                                     size_t count, loff_t *ppos)
 190 {
 191         char _buf[12], *buf = _buf;
 192         struct sta_info *sta = file->private_data;
 193         bool start, tx;
 194         unsigned long tid;
 195         int ret;
 196
 197         if (count > sizeof(_buf))
 198                 return -EINVAL;
 199
 200         if (copy_from_user(buf, userbuf, count))
 201                 return -EFAULT;
 202
 203         buf[sizeof(_buf) - 1] = '\0';
 204
 205         if (strncmp(buf, "tx ", 3) == 0) {
 206                 buf += 3;
 207                 tx = true;
 208         } else if (strncmp(buf, "rx ", 3) == 0) {
 209                 buf += 3;
 210                 tx = false;
 211         } else
 212                 return -EINVAL;
 213
 214         if (strncmp(buf, "start ", 6) == 0) {
 215                 buf += 6;
 216                 start = true;
 217                 if (!tx)
 218                         return -EINVAL;
 219         } else if (strncmp(buf, "stop ", 5) == 0) {
 220                 buf += 5;
 221                 start = false;
 222         } else
 223                 return -EINVAL;
 224
 225         ret = kstrtoul(buf, 0, &tid);
 226         if (ret)
 227                 return ret;
 228
 229         if (tid >= IEEE80211_NUM_TIDS)
 230                 return -EINVAL;
 231
 232         if (tx) {
 233                 if (start)
 234                         ret = ieee80211_start_tx_ba_session(&sta->sta, tid, 5000);
 235                 else
 236                         ret = ieee80211_stop_tx_ba_session(&sta->sta, tid);
 237         } else {
 238                 __ieee80211_stop_rx_ba_session(sta, tid, WLAN_BACK_RECIPIENT,
 239                                                3, true);
 240                 ret = 0;
 241         }
 242
 243         return ret ?: count;
 244 }
 245 STA_OPS_RW(agg_status);
 246
 247 static ssize_t sta_ht_capa_read(struct file *file, char __user *userbuf,
 248                                 size_t count, loff_t *ppos)
 249 {
 250 #define PRINT_HT_CAP(_cond, _str) \
 251         do { \
 252         if (_cond) \
 253                         p += scnprintf(p, sizeof(buf)+buf-p, "\t" _str "\n"); \
 254         } while (0)
 255         char buf[512], *p = buf;
 256         int i;
 257         struct sta_info *sta = file->private_data;
 258         struct ieee80211_sta_ht_cap *htc = &sta->sta.ht_cap;
 259
 260         p += scnprintf(p, sizeof(buf) + buf - p, "ht %ssupported\n",
 261                         htc->ht_supported ? "" : "not ");
 262         if (htc->ht_supported) {
 263                 p += scnprintf(p, sizeof(buf)+buf-p, "cap: %#.4x\n", htc->cap);
 264
 265                 PRINT_HT_CAP((htc->cap & BIT(0)), "RX LDPC");
 266                 PRINT_HT_CAP((htc->cap & BIT(1)), "HT20/HT40");
 267                 PRINT_HT_CAP(!(htc->cap & BIT(1)), "HT20");
 268
 269                 PRINT_HT_CAP(((htc->cap >> 2) & 0x3) == 0, "Static SM Power Save");
 270                 PRINT_HT_CAP(((htc->cap >> 2) & 0x3) == 1, "Dynamic SM Power Save");
 271                 PRINT_HT_CAP(((htc->cap >> 2) & 0x3) == 3, "SM Power Save disabled");
 272
 273                 PRINT_HT_CAP((htc->cap & BIT(4)), "RX Greenfield");
 274                 PRINT_HT_CAP((htc->cap & BIT(5)), "RX HT20 SGI");
 275                 PRINT_HT_CAP((htc->cap & BIT(6)), "RX HT40 SGI");
 276                 PRINT_HT_CAP((htc->cap & BIT(7)), "TX STBC");
 277
 278                 PRINT_HT_CAP(((htc->cap >> 8) & 0x3) == 0, "No RX STBC");
 279                 PRINT_HT_CAP(((htc->cap >> 8) & 0x3) == 1, "RX STBC 1-stream");
 280                 PRINT_HT_CAP(((htc->cap >> 8) & 0x3) == 2, "RX STBC 2-streams");
 281                 PRINT_HT_CAP(((htc->cap >> 8) & 0x3) == 3, "RX STBC 3-streams");
 282
 283                 PRINT_HT_CAP((htc->cap & BIT(10)), "HT Delayed Block Ack");
 284
 285                 PRINT_HT_CAP(!(htc->cap & BIT(11)), "Max AMSDU length: "
 286                              "3839 bytes");
 287                 PRINT_HT_CAP((htc->cap & BIT(11)), "Max AMSDU length: "
 288                              "7935 bytes");
 289
 290                 /*
 291                  * For beacons and probe response this would mean the BSS
 292                  * does or does not allow the usage of DSSS/CCK HT40.
 293                  * Otherwise it means the STA does or does not use
 294                  * DSSS/CCK HT40.
 295                  */
 296                 PRINT_HT_CAP((htc->cap & BIT(12)), "DSSS/CCK HT40");
 297                 PRINT_HT_CAP(!(htc->cap & BIT(12)), "No DSSS/CCK HT40");
 298
 299                 /* BIT(13) is reserved */
 300
 301                 PRINT_HT_CAP((htc->cap & BIT(14)), "40 MHz Intolerant");
 302
 303                 PRINT_HT_CAP((htc->cap & BIT(15)), "L-SIG TXOP protection");
 304
 305                 p += scnprintf(p, sizeof(buf)+buf-p, "ampdu factor/density: %d/%d\n",
 306                                 htc->ampdu_factor, htc->ampdu_density);
 307                 p += scnprintf(p, sizeof(buf)+buf-p, "MCS mask:");
 308
 309                 for (i = 0; i < IEEE80211_HT_MCS_MASK_LEN; i++)
 310                         p += scnprintf(p, sizeof(buf)+buf-p, " %.2x",
 311                                         htc->mcs.rx_mask[i]);
 312                 p += scnprintf(p, sizeof(buf)+buf-p, "\n");
 313
 314                 /* If not set this is meaningless */
 315                 if (le16_to_cpu(htc->mcs.rx_highest)) {
 316                         p += scnprintf(p, sizeof(buf)+buf-p,
 317                                        "MCS rx highest: %d Mbps\n",
 318                                        le16_to_cpu(htc->mcs.rx_highest));
 319                 }
 320
 321                 p += scnprintf(p, sizeof(buf)+buf-p, "MCS tx params: %x\n",
 322                                 htc->mcs.tx_params);
 323         }
 324
 325         return simple_read_from_buffer(userbuf, count, ppos, buf, p - buf);
 326 }
 327 STA_OPS(ht_capa);
 328
 329 static ssize_t sta_vht_capa_read(struct file *file, char __user *userbuf,
 330                                  size_t count, loff_t *ppos)
 331 {
 332         char buf[128], *p = buf;
 333         struct sta_info *sta = file->private_data;
 334         struct ieee80211_sta_vht_cap *vhtc = &sta->sta.vht_cap;
 335
 336         p += scnprintf(p, sizeof(buf) + buf - p, "VHT %ssupported\n",
 337                         vhtc->vht_supported ? "" : "not ");
 338         if (vhtc->vht_supported) {
 339                 p += scnprintf(p, sizeof(buf)+buf-p, "cap: %#.8x\n", vhtc->cap);
 340
 341                 p += scnprintf(p, sizeof(buf)+buf-p, "RX MCS: %.4x\n",
 342                                le16_to_cpu(vhtc->vht_mcs.rx_mcs_map));
 343                 if (vhtc->vht_mcs.rx_highest)
 344                         p += scnprintf(p, sizeof(buf)+buf-p,
 345                                        "MCS RX highest: %d Mbps\n",
 346                                        le16_to_cpu(vhtc->vht_mcs.rx_highest));
 347                 p += scnprintf(p, sizeof(buf)+buf-p, "TX MCS: %.4x\n",
 348                                le16_to_cpu(vhtc->vht_mcs.tx_mcs_map));
 349                 if (vhtc->vht_mcs.tx_highest)
 350                         p += scnprintf(p, sizeof(buf)+buf-p,
 351                                        "MCS TX highest: %d Mbps\n",
 352                                        le16_to_cpu(vhtc->vht_mcs.tx_highest));
 353         }
 354
 355         return simple_read_from_buffer(userbuf, count, ppos, buf, p - buf);
 356 }
 357 STA_OPS(vht_capa);
 358
 359 static ssize_t sta_current_tx_rate_read(struct file *file, char __user *userbuf,
 360                                         size_t count, loff_t *ppos)
 361 {
 362         struct sta_info *sta = file->private_data;
 363         struct rate_info rinfo;
 364         u16 rate;
 365         sta_set_rate_info_tx(sta, &sta->last_tx_rate, &rinfo);
 366         rate = cfg80211_calculate_bitrate(&rinfo);
 367
 368         return mac80211_format_buffer(userbuf, count, ppos,
 369                                       "%d.%d MBit/s\n",
 370                                       rate/10, rate%10);
 371 }
 372 STA_OPS(current_tx_rate);
 373
 374 static ssize_t sta_last_rx_rate_read(struct file *file, char __user *userbuf,
 375                                      size_t count, loff_t *ppos)
 376 {
 377         struct sta_info *sta = file->private_data;
 378         struct rate_info rinfo;
 379         u16 rate;
 380
 381         sta_set_rate_info_rx(sta, &rinfo);
 382
 383         rate = cfg80211_calculate_bitrate(&rinfo);
 384
 385         return mac80211_format_buffer(userbuf, count, ppos,
 386                                       "%d.%d MBit/s\n",
 387                                       rate/10, rate%10);
 388 }
 389 STA_OPS(last_rx_rate);
 390
 391 #define DEBUGFS_ADD(name) \
 392         debugfs_create_file(#name, 0400, \
 393                 sta->debugfs.dir, sta, &sta_ ##name## _ops);
 394
 395 #define DEBUGFS_ADD_COUNTER(name, field)                                \
 396         if (sizeof(sta->field) == sizeof(u32))                          \
 397                 debugfs_create_u32(#name, 0400, sta->debugfs.dir,       \
 398                         (u32 *) &sta->field);                           \
 399         else                                                            \
 400                 debugfs_create_u64(#name, 0400, sta->debugfs.dir,       \
 401                         (u64 *) &sta->field);
 402
 403 void ieee80211_sta_debugfs_add(struct sta_info *sta)
 404 {
 405         struct ieee80211_local *local = sta->local;
 406         struct ieee80211_sub_if_data *sdata = sta->sdata;
 407         struct dentry *stations_dir = sta->sdata->debugfs.subdir_stations;
 408         u8 mac[3*ETH_ALEN];
 409
 410         sta->debugfs.add_has_run = true;
 411
 412         if (!stations_dir)
 413                 return;
 414
 415         snprintf(mac, sizeof(mac), "%pM", sta->sta.addr);
 416
 417         /*
 418          * This might fail due to a race condition:
 419          * When mac80211 unlinks a station, the debugfs entries
 420          * remain, but it is already possible to link a new
 421          * station with the same address which triggers adding
 422          * it to debugfs; therefore, if the old station isn't
 423          * destroyed quickly enough the old station's debugfs
 424          * dir might still be around.
 425          */
 426         sta->debugfs.dir = debugfs_create_dir(mac, stations_dir);
 427         if (!sta->debugfs.dir)
 428                 return;
 429
 430         DEBUGFS_ADD(flags);
 431         DEBUGFS_ADD(num_ps_buf_frames);
 432         DEBUGFS_ADD(inactive_ms);
 433         DEBUGFS_ADD(connected_time);
 434         DEBUGFS_ADD(last_seq_ctrl);
 435         DEBUGFS_ADD(agg_status);
 436         DEBUGFS_ADD(dev);
 437         DEBUGFS_ADD(last_signal);
 438         DEBUGFS_ADD(beacon_loss_count);
 439         DEBUGFS_ADD(ht_capa);
 440         DEBUGFS_ADD(vht_capa);
 441         DEBUGFS_ADD(last_ack_signal);
 442         DEBUGFS_ADD(current_tx_rate);
 443         DEBUGFS_ADD(last_rx_rate);
 444
 445         DEBUGFS_ADD_COUNTER(rx_packets, rx_packets);
 446         DEBUGFS_ADD_COUNTER(tx_packets, tx_packets);
 447         DEBUGFS_ADD_COUNTER(rx_bytes, rx_bytes);
 448         DEBUGFS_ADD_COUNTER(tx_bytes, tx_bytes);
 449         DEBUGFS_ADD_COUNTER(rx_duplicates, num_duplicates);
 450         DEBUGFS_ADD_COUNTER(rx_fragments, rx_fragments);
 451         DEBUGFS_ADD_COUNTER(rx_dropped, rx_dropped);
 452         DEBUGFS_ADD_COUNTER(tx_fragments, tx_fragments);
 453         DEBUGFS_ADD_COUNTER(tx_filtered, tx_filtered_count);
 454         DEBUGFS_ADD_COUNTER(tx_retry_failed, tx_retry_failed);
 455         DEBUGFS_ADD_COUNTER(tx_retry_count, tx_retry_count);
 456         DEBUGFS_ADD_COUNTER(wep_weak_iv_count, wep_weak_iv_count);
 457
 458         if (sizeof(sta->driver_buffered_tids) == sizeof(u32))
 459                 debugfs_create_x32("driver_buffered_tids", 0400,
 460                                    sta->debugfs.dir,
 461                                    (u32 *)&sta->driver_buffered_tids);
 462         else
 463                 debugfs_create_x64("driver_buffered_tids", 0400,
 464                                    sta->debugfs.dir,
 465                                    (u64 *)&sta->driver_buffered_tids);
 466
 467         drv_sta_add_debugfs(local, sdata, &sta->sta, sta->debugfs.dir);
 468 }
 469
 470 void ieee80211_sta_debugfs_remove(struct sta_info *sta)
 471 {
 472         struct ieee80211_local *local = sta->local;
 473         struct ieee80211_sub_if_data *sdata = sta->sdata;
 474
 475         drv_sta_remove_debugfs(local, sdata, &sta->sta, sta->debugfs.dir);
 476         debugfs_remove_recursive(sta->debugfs.dir);
 477         sta->debugfs.dir = NULL;
 478 }