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 = mac80211_open_file_generic,                             \
  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 = mac80211_open_file_generic,                             \
  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[100];
  60         struct sta_info *sta = file->private_data;
  61         u32 staflags = get_sta_flags(sta);
  62         int res = scnprintf(buf, sizeof(buf), "%s%s%s%s%s%s%s%s%s",
  63                 staflags & WLAN_STA_AUTH ? "AUTH\n" : "",
  64                 staflags & WLAN_STA_ASSOC ? "ASSOC\n" : "",
  65                 staflags & WLAN_STA_PS_STA ? "PS (sta)\n" : "",
  66                 staflags & WLAN_STA_PS_DRIVER ? "PS (driver)\n" : "",
  67                 staflags & WLAN_STA_AUTHORIZED ? "AUTHORIZED\n" : "",
  68                 staflags & WLAN_STA_SHORT_PREAMBLE ? "SHORT PREAMBLE\n" : "",
  69                 staflags & WLAN_STA_WME ? "WME\n" : "",
  70                 staflags & WLAN_STA_WDS ? "WDS\n" : "",
  71                 staflags & WLAN_STA_MFP ? "MFP\n" : "");
  72         return simple_read_from_buffer(userbuf, count, ppos, buf, res);
  73 }
  74 STA_OPS(flags);
  75
  76 static ssize_t sta_num_ps_buf_frames_read(struct file *file,
  77                                           char __user *userbuf,
  78                                           size_t count, loff_t *ppos)
  79 {
  80         struct sta_info *sta = file->private_data;
  81         return mac80211_format_buffer(userbuf, count, ppos, "%u\n",
  82                                       skb_queue_len(&sta->ps_tx_buf));
  83 }
  84 STA_OPS(num_ps_buf_frames);
  85
  86 static ssize_t sta_inactive_ms_read(struct file *file, char __user *userbuf,
  87                                     size_t count, loff_t *ppos)
  88 {
  89         struct sta_info *sta = file->private_data;
  90         return mac80211_format_buffer(userbuf, count, ppos, "%d\n",
  91                                       jiffies_to_msecs(jiffies - sta->last_rx));
  92 }
  93 STA_OPS(inactive_ms);
  94
  95
  96 static ssize_t sta_connected_time_read(struct file *file, char __user *userbuf,
  97                                         size_t count, loff_t *ppos)
  98 {
  99         struct sta_info *sta = file->private_data;
 100         struct timespec uptime;
 101         struct tm result;
 102         long connected_time_secs;
 103         char buf[100];
 104         int res;
 105         do_posix_clock_monotonic_gettime(&uptime);
 106         connected_time_secs = uptime.tv_sec - sta->last_connected;
 107         time_to_tm(connected_time_secs, 0, &result);
 108         result.tm_year -= 70;
 109         result.tm_mday -= 1;
 110         res = scnprintf(buf, sizeof(buf),
 111                 "years  - %ld\nmonths - %d\ndays   - %d\nclock  - %d:%d:%d\n\n",
 112                         result.tm_year, result.tm_mon, result.tm_mday,
 113                         result.tm_hour, result.tm_min, result.tm_sec);
 114         return simple_read_from_buffer(userbuf, count, ppos, buf, res);
 115 }
 116 STA_OPS(connected_time);
 117
 118
 119
 120 static ssize_t sta_last_seq_ctrl_read(struct file *file, char __user *userbuf,
 121                                       size_t count, loff_t *ppos)
 122 {
 123         char buf[15*NUM_RX_DATA_QUEUES], *p = buf;
 124         int i;
 125         struct sta_info *sta = file->private_data;
 126         for (i = 0; i < NUM_RX_DATA_QUEUES; i++)
 127                 p += scnprintf(p, sizeof(buf)+buf-p, "%x ",
 128                                le16_to_cpu(sta->last_seq_ctrl[i]));
 129         p += scnprintf(p, sizeof(buf)+buf-p, "\n");
 130         return simple_read_from_buffer(userbuf, count, ppos, buf, p - buf);
 131 }
 132 STA_OPS(last_seq_ctrl);
 133
 134 static ssize_t sta_agg_status_read(struct file *file, char __user *userbuf,
 135                                         size_t count, loff_t *ppos)
 136 {
 137         char buf[71 + STA_TID_NUM * 40], *p = buf;
 138         int i;
 139         struct sta_info *sta = file->private_data;
 140         struct tid_ampdu_rx *tid_rx;
 141         struct tid_ampdu_tx *tid_tx;
 142
 143         rcu_read_lock();
 144
 145         p += scnprintf(p, sizeof(buf) + buf - p, "next dialog_token: %#02x\n",
 146                         sta->ampdu_mlme.dialog_token_allocator + 1);
 147         p += scnprintf(p, sizeof(buf) + buf - p,
 148                        "TID\t\tRX active\tDTKN\tSSN\t\tTX\tDTKN\tpending\n");
 149
 150         for (i = 0; i < STA_TID_NUM; i++) {
 151                 tid_rx = rcu_dereference(sta->ampdu_mlme.tid_rx[i]);
 152                 tid_tx = rcu_dereference(sta->ampdu_mlme.tid_tx[i]);
 153
 154                 p += scnprintf(p, sizeof(buf) + buf - p, "%02d", i);
 155                 p += scnprintf(p, sizeof(buf) + buf - p, "\t\t%x", !!tid_rx);
 156                 p += scnprintf(p, sizeof(buf) + buf - p, "\t%#.2x",
 157                                 tid_rx ? tid_rx->dialog_token : 0);
 158                 p += scnprintf(p, sizeof(buf) + buf - p, "\t%#.3x",
 159                                 tid_rx ? tid_rx->ssn : 0);
 160
 161                 p += scnprintf(p, sizeof(buf) + buf - p, "\t\t%x", !!tid_tx);
 162                 p += scnprintf(p, sizeof(buf) + buf - p, "\t%#.2x",
 163                                 tid_tx ? tid_tx->dialog_token : 0);
 164                 p += scnprintf(p, sizeof(buf) + buf - p, "\t%03d",
 165                                 tid_tx ? skb_queue_len(&tid_tx->pending) : 0);
 166                 p += scnprintf(p, sizeof(buf) + buf - p, "\n");
 167         }
 168         rcu_read_unlock();
 169
 170         return simple_read_from_buffer(userbuf, count, ppos, buf, p - buf);
 171 }
 172
 173 static ssize_t sta_agg_status_write(struct file *file, const char __user *userbuf,
 174                                     size_t count, loff_t *ppos)
 175 {
 176         char _buf[12], *buf = _buf;
 177         struct sta_info *sta = file->private_data;
 178         bool start, tx;
 179         unsigned long tid;
 180         int ret;
 181
 182         if (count > sizeof(_buf))
 183                 return -EINVAL;
 184
 185         if (copy_from_user(buf, userbuf, count))
 186                 return -EFAULT;
 187
 188         buf[sizeof(_buf) - 1] = '\0';
 189
 190         if (strncmp(buf, "tx ", 3) == 0) {
 191                 buf += 3;
 192                 tx = true;
 193         } else if (strncmp(buf, "rx ", 3) == 0) {
 194                 buf += 3;
 195                 tx = false;
 196         } else
 197                 return -EINVAL;
 198
 199         if (strncmp(buf, "start ", 6) == 0) {
 200                 buf += 6;
 201                 start = true;
 202                 if (!tx)
 203                         return -EINVAL;
 204         } else if (strncmp(buf, "stop ", 5) == 0) {
 205                 buf += 5;
 206                 start = false;
 207         } else
 208                 return -EINVAL;
 209
 210         tid = simple_strtoul(buf, NULL, 0);
 211
 212         if (tid >= STA_TID_NUM)
 213                 return -EINVAL;
 214
 215         if (tx) {
 216                 if (start)
 217                         ret = ieee80211_start_tx_ba_session(&sta->sta, tid, 5000);
 218                 else
 219                         ret = ieee80211_stop_tx_ba_session(&sta->sta, tid);
 220         } else {
 221                 __ieee80211_stop_rx_ba_session(sta, tid, WLAN_BACK_RECIPIENT,
 222                                                3, true);
 223                 ret = 0;
 224         }
 225
 226         return ret ?: count;
 227 }
 228 STA_OPS_RW(agg_status);
 229
 230 static ssize_t sta_ht_capa_read(struct file *file, char __user *userbuf,
 231                                 size_t count, loff_t *ppos)
 232 {
 233 #define PRINT_HT_CAP(_cond, _str) \
 234         do { \
 235         if (_cond) \
 236                         p += scnprintf(p, sizeof(buf)+buf-p, "\t" _str "\n"); \
 237         } while (0)
 238         char buf[512], *p = buf;
 239         int i;
 240         struct sta_info *sta = file->private_data;
 241         struct ieee80211_sta_ht_cap *htc = &sta->sta.ht_cap;
 242
 243         p += scnprintf(p, sizeof(buf) + buf - p, "ht %ssupported\n",
 244                         htc->ht_supported ? "" : "not ");
 245         if (htc->ht_supported) {
 246                 p += scnprintf(p, sizeof(buf)+buf-p, "cap: %#.4x\n", htc->cap);
 247
 248                 PRINT_HT_CAP((htc->cap & BIT(0)), "RX LDPC");
 249                 PRINT_HT_CAP((htc->cap & BIT(1)), "HT20/HT40");
 250                 PRINT_HT_CAP(!(htc->cap & BIT(1)), "HT20");
 251
 252                 PRINT_HT_CAP(((htc->cap >> 2) & 0x3) == 0, "Static SM Power Save");
 253                 PRINT_HT_CAP(((htc->cap >> 2) & 0x3) == 1, "Dynamic SM Power Save");
 254                 PRINT_HT_CAP(((htc->cap >> 2) & 0x3) == 3, "SM Power Save disabled");
 255
 256                 PRINT_HT_CAP((htc->cap & BIT(4)), "RX Greenfield");
 257                 PRINT_HT_CAP((htc->cap & BIT(5)), "RX HT20 SGI");
 258                 PRINT_HT_CAP((htc->cap & BIT(6)), "RX HT40 SGI");
 259                 PRINT_HT_CAP((htc->cap & BIT(7)), "TX STBC");
 260
 261                 PRINT_HT_CAP(((htc->cap >> 8) & 0x3) == 0, "No RX STBC");
 262                 PRINT_HT_CAP(((htc->cap >> 8) & 0x3) == 1, "RX STBC 1-stream");
 263                 PRINT_HT_CAP(((htc->cap >> 8) & 0x3) == 2, "RX STBC 2-streams");
 264                 PRINT_HT_CAP(((htc->cap >> 8) & 0x3) == 3, "RX STBC 3-streams");
 265
 266                 PRINT_HT_CAP((htc->cap & BIT(10)), "HT Delayed Block Ack");
 267
 268                 PRINT_HT_CAP((htc->cap & BIT(11)), "Max AMSDU length: "
 269                              "3839 bytes");
 270                 PRINT_HT_CAP(!(htc->cap & BIT(11)), "Max AMSDU length: "
 271                              "7935 bytes");
 272
 273                 /*
 274                  * For beacons and probe response this would mean the BSS
 275                  * does or does not allow the usage of DSSS/CCK HT40.
 276                  * Otherwise it means the STA does or does not use
 277                  * DSSS/CCK HT40.
 278                  */
 279                 PRINT_HT_CAP((htc->cap & BIT(12)), "DSSS/CCK HT40");
 280                 PRINT_HT_CAP(!(htc->cap & BIT(12)), "No DSSS/CCK HT40");
 281
 282                 /* BIT(13) is reserved */
 283
 284                 PRINT_HT_CAP((htc->cap & BIT(14)), "40 MHz Intolerant");
 285
 286                 PRINT_HT_CAP((htc->cap & BIT(15)), "L-SIG TXOP protection");
 287
 288                 p += scnprintf(p, sizeof(buf)+buf-p, "ampdu factor/density: %d/%d\n",
 289                                 htc->ampdu_factor, htc->ampdu_density);
 290                 p += scnprintf(p, sizeof(buf)+buf-p, "MCS mask:");
 291
 292                 for (i = 0; i < IEEE80211_HT_MCS_MASK_LEN; i++)
 293                         p += scnprintf(p, sizeof(buf)+buf-p, " %.2x",
 294                                         htc->mcs.rx_mask[i]);
 295                 p += scnprintf(p, sizeof(buf)+buf-p, "\n");
 296
 297                 /* If not set this is meaningless */
 298                 if (le16_to_cpu(htc->mcs.rx_highest)) {
 299                         p += scnprintf(p, sizeof(buf)+buf-p,
 300                                        "MCS rx highest: %d Mbps\n",
 301                                        le16_to_cpu(htc->mcs.rx_highest));
 302                 }
 303
 304                 p += scnprintf(p, sizeof(buf)+buf-p, "MCS tx params: %x\n",
 305                                 htc->mcs.tx_params);
 306         }
 307
 308         return simple_read_from_buffer(userbuf, count, ppos, buf, p - buf);
 309 }
 310 STA_OPS(ht_capa);
 311
 312 #define DEBUGFS_ADD(name) \
 313         debugfs_create_file(#name, 0400, \
 314                 sta->debugfs.dir, sta, &sta_ ##name## _ops);
 315
 316 #define DEBUGFS_ADD_COUNTER(name, field)                                \
 317         if (sizeof(sta->field) == sizeof(u32))                          \
 318                 debugfs_create_u32(#name, 0400, sta->debugfs.dir,       \
 319                         (u32 *) &sta->field);                           \
 320         else                                                            \
 321                 debugfs_create_u64(#name, 0400, sta->debugfs.dir,       \
 322                         (u64 *) &sta->field);
 323
 324 void ieee80211_sta_debugfs_add(struct sta_info *sta)
 325 {
 326         struct dentry *stations_dir = sta->sdata->debugfs.subdir_stations;
 327         u8 mac[3*ETH_ALEN];
 328
 329         sta->debugfs.add_has_run = true;
 330
 331         if (!stations_dir)
 332                 return;
 333
 334         snprintf(mac, sizeof(mac), "%pM", sta->sta.addr);
 335
 336         /*
 337          * This might fail due to a race condition:
 338          * When mac80211 unlinks a station, the debugfs entries
 339          * remain, but it is already possible to link a new
 340          * station with the same address which triggers adding
 341          * it to debugfs; therefore, if the old station isn't
 342          * destroyed quickly enough the old station's debugfs
 343          * dir might still be around.
 344          */
 345         sta->debugfs.dir = debugfs_create_dir(mac, stations_dir);
 346         if (!sta->debugfs.dir)
 347                 return;
 348
 349         DEBUGFS_ADD(flags);
 350         DEBUGFS_ADD(num_ps_buf_frames);
 351         DEBUGFS_ADD(inactive_ms);
 352         DEBUGFS_ADD(connected_time);
 353         DEBUGFS_ADD(last_seq_ctrl);
 354         DEBUGFS_ADD(agg_status);
 355         DEBUGFS_ADD(dev);
 356         DEBUGFS_ADD(last_signal);
 357         DEBUGFS_ADD(ht_capa);
 358
 359         DEBUGFS_ADD_COUNTER(rx_packets, rx_packets);
 360         DEBUGFS_ADD_COUNTER(tx_packets, tx_packets);
 361         DEBUGFS_ADD_COUNTER(rx_bytes, rx_bytes);
 362         DEBUGFS_ADD_COUNTER(tx_bytes, tx_bytes);
 363         DEBUGFS_ADD_COUNTER(rx_duplicates, num_duplicates);
 364         DEBUGFS_ADD_COUNTER(rx_fragments, rx_fragments);
 365         DEBUGFS_ADD_COUNTER(rx_dropped, rx_dropped);
 366         DEBUGFS_ADD_COUNTER(tx_fragments, tx_fragments);
 367         DEBUGFS_ADD_COUNTER(tx_filtered, tx_filtered_count);
 368         DEBUGFS_ADD_COUNTER(tx_retry_failed, tx_retry_failed);
 369         DEBUGFS_ADD_COUNTER(tx_retry_count, tx_retry_count);
 370         DEBUGFS_ADD_COUNTER(wep_weak_iv_count, wep_weak_iv_count);
 371 }
 372
 373 void ieee80211_sta_debugfs_remove(struct sta_info *sta)
 374 {
 375         debugfs_remove_recursive(sta->debugfs.dir);
 376         sta->debugfs.dir = NULL;
 377 }