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
  18 /* sta attributtes */
  19
  20 #define STA_READ(name, field, format_string)                            \
  21 static ssize_t sta_ ##name## _read(struct file *file,                   \
  22                                    char __user *userbuf,                \
  23                                    size_t count, loff_t *ppos)          \
  24 {                                                                       \
  25         struct sta_info *sta = file->private_data;                      \
  26         return mac80211_format_buffer(userbuf, count, ppos,             \
  27                                       format_string, sta->field);       \
  28 }
  29 #define STA_READ_D(name, field) STA_READ(name, field, "%d\n")
  30 #define STA_READ_U(name, field) STA_READ(name, field, "%u\n")
  31 #define STA_READ_S(name, field) STA_READ(name, field, "%s\n")
  32
  33 #define STA_OPS(name)                                                   \
  34 static const struct file_operations sta_ ##name## _ops = {              \
  35         .read = sta_##name##_read,                                      \
  36         .open = simple_open,                                            \
  37         .llseek = generic_file_llseek,                                  \
  38 }
  39
  40 #define STA_OPS_RW(name)                                                \
  41 static const struct file_operations sta_ ##name## _ops = {              \
  42         .read = sta_##name##_read,                                      \
  43         .write = sta_##name##_write,                                    \
  44         .open = simple_open,                                            \
  45         .llseek = generic_file_llseek,                                  \
  46 }
  47
  48 #define STA_FILE(name, field, format)                                   \
  49                 STA_READ_##format(name, field)                          \
  50                 STA_OPS(name)
  51
  52 STA_FILE(aid, sta.aid, D);
  53 STA_FILE(dev, sdata->name, S);
  54 STA_FILE(last_signal, last_signal, D);
  55
  56 static ssize_t sta_flags_read(struct file *file, char __user *userbuf,
  57                               size_t count, loff_t *ppos)
  58 {
  59         char buf[121];
  60         struct sta_info *sta = file->private_data;
  61
  62 #define TEST(flg) \
  63         test_sta_flag(sta, WLAN_STA_##flg) ? #flg "\n" : ""
  64
  65         int res = scnprintf(buf, sizeof(buf),
  66                             "%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s",
  67                             TEST(AUTH), TEST(ASSOC), TEST(PS_STA),
  68                             TEST(PS_DRIVER), TEST(AUTHORIZED),
  69                             TEST(SHORT_PREAMBLE),
  70                             TEST(WME), TEST(WDS), TEST(CLEAR_PS_FILT),
  71                             TEST(MFP), TEST(BLOCK_BA), TEST(PSPOLL),
  72                             TEST(UAPSD), TEST(SP), TEST(TDLS_PEER),
  73                             TEST(TDLS_PEER_AUTH), TEST(4ADDR_EVENT),
  74                             TEST(INSERTED), TEST(RATE_CONTROL));
  75 #undef TEST
  76         return simple_read_from_buffer(userbuf, count, ppos, buf, res);
  77 }
  78 STA_OPS(flags);
  79
  80 static ssize_t sta_num_ps_buf_frames_read(struct file *file,
  81                                           char __user *userbuf,
  82                                           size_t count, loff_t *ppos)
  83 {
  84         struct sta_info *sta = file->private_data;
  85         char buf[17*IEEE80211_NUM_ACS], *p = buf;
  86         int ac;
  87
  88         for (ac = 0; ac < IEEE80211_NUM_ACS; ac++)
  89                 p += scnprintf(p, sizeof(buf)+buf-p, "AC%d: %d\n", ac,
  90                                skb_queue_len(&sta->ps_tx_buf[ac]) +
  91                                skb_queue_len(&sta->tx_filtered[ac]));
  92         return simple_read_from_buffer(userbuf, count, ppos, buf, p - buf);
  93 }
  94 STA_OPS(num_ps_buf_frames);
  95
  96 static ssize_t sta_inactive_ms_read(struct file *file, char __user *userbuf,
  97                                     size_t count, loff_t *ppos)
  98 {
  99         struct sta_info *sta = file->private_data;
 100         return mac80211_format_buffer(userbuf, count, ppos, "%d\n",
 101                                       jiffies_to_msecs(jiffies - sta->last_rx));
 102 }
 103 STA_OPS(inactive_ms);
 104
 105
 106 static ssize_t sta_connected_time_read(struct file *file, char __user *userbuf,
 107                                         size_t count, loff_t *ppos)
 108 {
 109         struct sta_info *sta = file->private_data;
 110         struct timespec uptime;
 111         struct tm result;
 112         long connected_time_secs;
 113         char buf[100];
 114         int res;
 115         do_posix_clock_monotonic_gettime(&uptime);
 116         connected_time_secs = uptime.tv_sec - sta->last_connected;
 117         time_to_tm(connected_time_secs, 0, &result);
 118         result.tm_year -= 70;
 119         result.tm_mday -= 1;
 120         res = scnprintf(buf, sizeof(buf),
 121                 "years  - %ld\nmonths - %d\ndays   - %d\nclock  - %d:%d:%d\n\n",
 122                         result.tm_year, result.tm_mon, result.tm_mday,
 123                         result.tm_hour, result.tm_min, result.tm_sec);
 124         return simple_read_from_buffer(userbuf, count, ppos, buf, res);
 125 }
 126 STA_OPS(connected_time);
 127
 128
 129
 130 static ssize_t sta_last_seq_ctrl_read(struct file *file, char __user *userbuf,
 131                                       size_t count, loff_t *ppos)
 132 {
 133         char buf[15*NUM_RX_DATA_QUEUES], *p = buf;
 134         int i;
 135         struct sta_info *sta = file->private_data;
 136         for (i = 0; i < NUM_RX_DATA_QUEUES; i++)
 137                 p += scnprintf(p, sizeof(buf)+buf-p, "%x ",
 138                                le16_to_cpu(sta->last_seq_ctrl[i]));
 139         p += scnprintf(p, sizeof(buf)+buf-p, "\n");
 140         return simple_read_from_buffer(userbuf, count, ppos, buf, p - buf);
 141 }
 142 STA_OPS(last_seq_ctrl);
 143
 144 static ssize_t sta_agg_status_read(struct file *file, char __user *userbuf,
 145                                         size_t count, loff_t *ppos)
 146 {
 147         char buf[71 + STA_TID_NUM * 40], *p = buf;
 148         int i;
 149         struct sta_info *sta = file->private_data;
 150         struct tid_ampdu_rx *tid_rx;
 151         struct tid_ampdu_tx *tid_tx;
 152
 153         rcu_read_lock();
 154
 155         p += scnprintf(p, sizeof(buf) + buf - p, "next dialog_token: %#02x\n",
 156                         sta->ampdu_mlme.dialog_token_allocator + 1);
 157         p += scnprintf(p, sizeof(buf) + buf - p,
 158                        "TID\t\tRX active\tDTKN\tSSN\t\tTX\tDTKN\tpending\n");
 159
 160         for (i = 0; i < STA_TID_NUM; i++) {
 161                 tid_rx = rcu_dereference(sta->ampdu_mlme.tid_rx[i]);
 162                 tid_tx = rcu_dereference(sta->ampdu_mlme.tid_tx[i]);
 163
 164                 p += scnprintf(p, sizeof(buf) + buf - p, "%02d", i);
 165                 p += scnprintf(p, sizeof(buf) + buf - p, "\t\t%x", !!tid_rx);
 166                 p += scnprintf(p, sizeof(buf) + buf - p, "\t%#.2x",
 167                                 tid_rx ? tid_rx->dialog_token : 0);
 168                 p += scnprintf(p, sizeof(buf) + buf - p, "\t%#.3x",
 169                                 tid_rx ? tid_rx->ssn : 0);
 170
 171                 p += scnprintf(p, sizeof(buf) + buf - p, "\t\t%x", !!tid_tx);
 172                 p += scnprintf(p, sizeof(buf) + buf - p, "\t%#.2x",
 173                                 tid_tx ? tid_tx->dialog_token : 0);
 174                 p += scnprintf(p, sizeof(buf) + buf - p, "\t%03d",
 175                                 tid_tx ? skb_queue_len(&tid_tx->pending) : 0);
 176                 p += scnprintf(p, sizeof(buf) + buf - p, "\n");
 177         }
 178         rcu_read_unlock();
 179
 180         return simple_read_from_buffer(userbuf, count, ppos, buf, p - buf);
 181 }
 182
 183 static ssize_t sta_agg_status_write(struct file *file, const char __user *userbuf,
 184                                     size_t count, loff_t *ppos)
 185 {
 186         char _buf[12], *buf = _buf;
 187         struct sta_info *sta = file->private_data;
 188         bool start, tx;
 189         unsigned long tid;
 190         int ret;
 191
 192         if (count > sizeof(_buf))
 193                 return -EINVAL;
 194
 195         if (copy_from_user(buf, userbuf, count))
 196                 return -EFAULT;
 197
 198         buf[sizeof(_buf) - 1] = '\0';
 199
 200         if (strncmp(buf, "tx ", 3) == 0) {
 201                 buf += 3;
 202                 tx = true;
 203         } else if (strncmp(buf, "rx ", 3) == 0) {
 204                 buf += 3;
 205                 tx = false;
 206         } else
 207                 return -EINVAL;
 208
 209         if (strncmp(buf, "start ", 6) == 0) {
 210                 buf += 6;
 211                 start = true;
 212                 if (!tx)
 213                         return -EINVAL;
 214         } else if (strncmp(buf, "stop ", 5) == 0) {
 215                 buf += 5;
 216                 start = false;
 217         } else
 218                 return -EINVAL;
 219
 220         tid = simple_strtoul(buf, NULL, 0);
 221
 222         if (tid >= STA_TID_NUM)
 223                 return -EINVAL;
 224
 225         if (tx) {
 226                 if (start)
 227                         ret = ieee80211_start_tx_ba_session(&sta->sta, tid, 5000);
 228                 else
 229                         ret = ieee80211_stop_tx_ba_session(&sta->sta, tid);
 230         } else {
 231                 __ieee80211_stop_rx_ba_session(sta, tid, WLAN_BACK_RECIPIENT,
 232                                                3, true);
 233                 ret = 0;
 234         }
 235
 236         return ret ?: count;
 237 }
 238 STA_OPS_RW(agg_status);
 239
 240 static ssize_t sta_ht_capa_read(struct file *file, char __user *userbuf,
 241                                 size_t count, loff_t *ppos)
 242 {
 243 #define PRINT_HT_CAP(_cond, _str) \
 244         do { \
 245         if (_cond) \
 246                         p += scnprintf(p, sizeof(buf)+buf-p, "\t" _str "\n"); \
 247         } while (0)
 248         char buf[512], *p = buf;
 249         int i;
 250         struct sta_info *sta = file->private_data;
 251         struct ieee80211_sta_ht_cap *htc = &sta->sta.ht_cap;
 252
 253         p += scnprintf(p, sizeof(buf) + buf - p, "ht %ssupported\n",
 254                         htc->ht_supported ? "" : "not ");
 255         if (htc->ht_supported) {
 256                 p += scnprintf(p, sizeof(buf)+buf-p, "cap: %#.4x\n", htc->cap);
 257
 258                 PRINT_HT_CAP((htc->cap & BIT(0)), "RX LDPC");
 259                 PRINT_HT_CAP((htc->cap & BIT(1)), "HT20/HT40");
 260                 PRINT_HT_CAP(!(htc->cap & BIT(1)), "HT20");
 261
 262                 PRINT_HT_CAP(((htc->cap >> 2) & 0x3) == 0, "Static SM Power Save");
 263                 PRINT_HT_CAP(((htc->cap >> 2) & 0x3) == 1, "Dynamic SM Power Save");
 264                 PRINT_HT_CAP(((htc->cap >> 2) & 0x3) == 3, "SM Power Save disabled");
 265
 266                 PRINT_HT_CAP((htc->cap & BIT(4)), "RX Greenfield");
 267                 PRINT_HT_CAP((htc->cap & BIT(5)), "RX HT20 SGI");
 268                 PRINT_HT_CAP((htc->cap & BIT(6)), "RX HT40 SGI");
 269                 PRINT_HT_CAP((htc->cap & BIT(7)), "TX STBC");
 270
 271                 PRINT_HT_CAP(((htc->cap >> 8) & 0x3) == 0, "No RX STBC");
 272                 PRINT_HT_CAP(((htc->cap >> 8) & 0x3) == 1, "RX STBC 1-stream");
 273                 PRINT_HT_CAP(((htc->cap >> 8) & 0x3) == 2, "RX STBC 2-streams");
 274                 PRINT_HT_CAP(((htc->cap >> 8) & 0x3) == 3, "RX STBC 3-streams");
 275
 276                 PRINT_HT_CAP((htc->cap & BIT(10)), "HT Delayed Block Ack");
 277
 278                 PRINT_HT_CAP(!(htc->cap & BIT(11)), "Max AMSDU length: "
 279                              "3839 bytes");
 280                 PRINT_HT_CAP((htc->cap & BIT(11)), "Max AMSDU length: "
 281                              "7935 bytes");
 282
 283                 /*
 284                  * For beacons and probe response this would mean the BSS
 285                  * does or does not allow the usage of DSSS/CCK HT40.
 286                  * Otherwise it means the STA does or does not use
 287                  * DSSS/CCK HT40.
 288                  */
 289                 PRINT_HT_CAP((htc->cap & BIT(12)), "DSSS/CCK HT40");
 290                 PRINT_HT_CAP(!(htc->cap & BIT(12)), "No DSSS/CCK HT40");
 291
 292                 /* BIT(13) is reserved */
 293
 294                 PRINT_HT_CAP((htc->cap & BIT(14)), "40 MHz Intolerant");
 295
 296                 PRINT_HT_CAP((htc->cap & BIT(15)), "L-SIG TXOP protection");
 297
 298                 p += scnprintf(p, sizeof(buf)+buf-p, "ampdu factor/density: %d/%d\n",
 299                                 htc->ampdu_factor, htc->ampdu_density);
 300                 p += scnprintf(p, sizeof(buf)+buf-p, "MCS mask:");
 301
 302                 for (i = 0; i < IEEE80211_HT_MCS_MASK_LEN; i++)
 303                         p += scnprintf(p, sizeof(buf)+buf-p, " %.2x",
 304                                         htc->mcs.rx_mask[i]);
 305                 p += scnprintf(p, sizeof(buf)+buf-p, "\n");
 306
 307                 /* If not set this is meaningless */
 308                 if (le16_to_cpu(htc->mcs.rx_highest)) {
 309                         p += scnprintf(p, sizeof(buf)+buf-p,
 310                                        "MCS rx highest: %d Mbps\n",
 311                                        le16_to_cpu(htc->mcs.rx_highest));
 312                 }
 313
 314                 p += scnprintf(p, sizeof(buf)+buf-p, "MCS tx params: %x\n",
 315                                 htc->mcs.tx_params);
 316         }
 317
 318         return simple_read_from_buffer(userbuf, count, ppos, buf, p - buf);
 319 }
 320 STA_OPS(ht_capa);
 321
 322 #define DEBUGFS_ADD(name) \
 323         debugfs_create_file(#name, 0400, \
 324                 sta->debugfs.dir, sta, &sta_ ##name## _ops);
 325
 326 #define DEBUGFS_ADD_COUNTER(name, field)                                \
 327         if (sizeof(sta->field) == sizeof(u32))                          \
 328                 debugfs_create_u32(#name, 0400, sta->debugfs.dir,       \
 329                         (u32 *) &sta->field);                           \
 330         else                                                            \
 331                 debugfs_create_u64(#name, 0400, sta->debugfs.dir,       \
 332                         (u64 *) &sta->field);
 333
 334 void ieee80211_sta_debugfs_add(struct sta_info *sta)
 335 {
 336         struct dentry *stations_dir = sta->sdata->debugfs.subdir_stations;
 337         u8 mac[3*ETH_ALEN];
 338
 339         sta->debugfs.add_has_run = true;
 340
 341         if (!stations_dir)
 342                 return;
 343
 344         snprintf(mac, sizeof(mac), "%pM", sta->sta.addr);
 345
 346         /*
 347          * This might fail due to a race condition:
 348          * When mac80211 unlinks a station, the debugfs entries
 349          * remain, but it is already possible to link a new
 350          * station with the same address which triggers adding
 351          * it to debugfs; therefore, if the old station isn't
 352          * destroyed quickly enough the old station's debugfs
 353          * dir might still be around.
 354          */
 355         sta->debugfs.dir = debugfs_create_dir(mac, stations_dir);
 356         if (!sta->debugfs.dir)
 357                 return;
 358
 359         DEBUGFS_ADD(flags);
 360         DEBUGFS_ADD(num_ps_buf_frames);
 361         DEBUGFS_ADD(inactive_ms);
 362         DEBUGFS_ADD(connected_time);
 363         DEBUGFS_ADD(last_seq_ctrl);
 364         DEBUGFS_ADD(agg_status);
 365         DEBUGFS_ADD(dev);
 366         DEBUGFS_ADD(last_signal);
 367         DEBUGFS_ADD(ht_capa);
 368
 369         DEBUGFS_ADD_COUNTER(rx_packets, rx_packets);
 370         DEBUGFS_ADD_COUNTER(tx_packets, tx_packets);
 371         DEBUGFS_ADD_COUNTER(rx_bytes, rx_bytes);
 372         DEBUGFS_ADD_COUNTER(tx_bytes, tx_bytes);
 373         DEBUGFS_ADD_COUNTER(rx_duplicates, num_duplicates);
 374         DEBUGFS_ADD_COUNTER(rx_fragments, rx_fragments);
 375         DEBUGFS_ADD_COUNTER(rx_dropped, rx_dropped);
 376         DEBUGFS_ADD_COUNTER(tx_fragments, tx_fragments);
 377         DEBUGFS_ADD_COUNTER(tx_filtered, tx_filtered_count);
 378         DEBUGFS_ADD_COUNTER(tx_retry_failed, tx_retry_failed);
 379         DEBUGFS_ADD_COUNTER(tx_retry_count, tx_retry_count);
 380         DEBUGFS_ADD_COUNTER(wep_weak_iv_count, wep_weak_iv_count);
 381 }
 382
 383 void ieee80211_sta_debugfs_remove(struct sta_info *sta)
 384 {
 385         debugfs_remove_recursive(sta->debugfs.dir);
 386         sta->debugfs.dir = NULL;
 387 }