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