linux/net/mac80211/debugfs_sta.c
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   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)                            \
  21static 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)                                                   \
  34static 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)                                                \
  41static 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
  52STA_FILE(aid, sta.aid, D);
  53STA_FILE(dev, sdata->name, S);
  54STA_FILE(last_signal, last_signal, D);
  55
  56static 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}
  79STA_OPS(flags);
  80
  81static 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}
  95STA_OPS(num_ps_buf_frames);
  96
  97static 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}
 104STA_OPS(inactive_ms);
 105
 106
 107static 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}
 127STA_OPS(connected_time);
 128
 129
 130
 131static 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}
 143STA_OPS(last_seq_ctrl);
 144
 145static 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
 184static 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}
 239STA_OPS_RW(agg_status);
 240
 241static 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}
 321STA_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
 335void 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
 384void ieee80211_sta_debugfs_remove(struct sta_info *sta)
 385{
 386        debugfs_remove_recursive(sta->debugfs.dir);
 387        sta->debugfs.dir = NULL;
 388}
 389
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