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