net/mac80211/cfg.c

   1 /*
   2  * mac80211 configuration hooks for cfg80211
   3  *
   4  * Copyright 2006-2010  Johannes Berg <johannes@sipsolutions.net>
   5  *
   6  * This file is GPLv2 as found in COPYING.
   7  */
   8
   9 #include <linux/ieee80211.h>
  10 #include <linux/nl80211.h>
  11 #include <linux/rtnetlink.h>
  12 #include <linux/slab.h>
  13 #include <net/net_namespace.h>
  14 #include <linux/rcupdate.h>
  15 #include <linux/if_ether.h>
  16 #include <net/cfg80211.h>
  17 #include "ieee80211_i.h"
  18 #include "driver-ops.h"
  19 #include "cfg.h"
  20 #include "rate.h"
  21 #include "mesh.h"
  22
  23 static struct wireless_dev *ieee80211_add_iface(struct wiphy *wiphy, char *name,
  24                                                 enum nl80211_iftype type,
  25                                                 u32 *flags,
  26                                                 struct vif_params *params)
  27 {
  28         struct ieee80211_local *local = wiphy_priv(wiphy);
  29         struct wireless_dev *wdev;
  30         struct ieee80211_sub_if_data *sdata;
  31         int err;
  32
  33         err = ieee80211_if_add(local, name, &wdev, type, params);
  34         if (err)
  35                 return ERR_PTR(err);
  36
  37         if (type == NL80211_IFTYPE_MONITOR && flags) {
  38                 sdata = IEEE80211_WDEV_TO_SUB_IF(wdev);
  39                 sdata->u.mntr_flags = *flags;
  40         }
  41
  42         return wdev;
  43 }
  44
  45 static int ieee80211_del_iface(struct wiphy *wiphy, struct wireless_dev *wdev)
  46 {
  47         ieee80211_if_remove(IEEE80211_WDEV_TO_SUB_IF(wdev));
  48
  49         return 0;
  50 }
  51
  52 static int ieee80211_change_iface(struct wiphy *wiphy,
  53                                   struct net_device *dev,
  54                                   enum nl80211_iftype type, u32 *flags,
  55                                   struct vif_params *params)
  56 {
  57         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
  58         int ret;
  59
  60         ret = ieee80211_if_change_type(sdata, type);
  61         if (ret)
  62                 return ret;
  63
  64         if (type == NL80211_IFTYPE_AP_VLAN &&
  65             params && params->use_4addr == 0)
  66                 RCU_INIT_POINTER(sdata->u.vlan.sta, NULL);
  67         else if (type == NL80211_IFTYPE_STATION &&
  68                  params && params->use_4addr >= 0)
  69                 sdata->u.mgd.use_4addr = params->use_4addr;
  70
  71         if (sdata->vif.type == NL80211_IFTYPE_MONITOR && flags) {
  72                 struct ieee80211_local *local = sdata->local;
  73
  74                 if (ieee80211_sdata_running(sdata)) {
  75                         /*
  76                          * Prohibit MONITOR_FLAG_COOK_FRAMES to be
  77                          * changed while the interface is up.
  78                          * Else we would need to add a lot of cruft
  79                          * to update everything:
  80                          *      cooked_mntrs, monitor and all fif_* counters
  81                          *      reconfigure hardware
  82                          */
  83                         if ((*flags & MONITOR_FLAG_COOK_FRAMES) !=
  84                             (sdata->u.mntr_flags & MONITOR_FLAG_COOK_FRAMES))
  85                                 return -EBUSY;
  86
  87                         ieee80211_adjust_monitor_flags(sdata, -1);
  88                         sdata->u.mntr_flags = *flags;
  89                         ieee80211_adjust_monitor_flags(sdata, 1);
  90
  91                         ieee80211_configure_filter(local);
  92                 } else {
  93                         /*
  94                          * Because the interface is down, ieee80211_do_stop
  95                          * and ieee80211_do_open take care of "everything"
  96                          * mentioned in the comment above.
  97                          */
  98                         sdata->u.mntr_flags = *flags;
  99                 }
 100         }
 101
 102         return 0;
 103 }
 104
 105 static int ieee80211_start_p2p_device(struct wiphy *wiphy,
 106                                       struct wireless_dev *wdev)
 107 {
 108         return ieee80211_do_open(wdev, true);
 109 }
 110
 111 static void ieee80211_stop_p2p_device(struct wiphy *wiphy,
 112                                       struct wireless_dev *wdev)
 113 {
 114         ieee80211_sdata_stop(IEEE80211_WDEV_TO_SUB_IF(wdev));
 115 }
 116
 117 static int ieee80211_set_noack_map(struct wiphy *wiphy,
 118                                   struct net_device *dev,
 119                                   u16 noack_map)
 120 {
 121         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 122
 123         sdata->noack_map = noack_map;
 124         return 0;
 125 }
 126
 127 static int ieee80211_add_key(struct wiphy *wiphy, struct net_device *dev,
 128                              u8 key_idx, bool pairwise, const u8 *mac_addr,
 129                              struct key_params *params)
 130 {
 131         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 132         struct sta_info *sta = NULL;
 133         struct ieee80211_key *key;
 134         int err;
 135
 136         if (!ieee80211_sdata_running(sdata))
 137                 return -ENETDOWN;
 138
 139         /* reject WEP and TKIP keys if WEP failed to initialize */
 140         switch (params->cipher) {
 141         case WLAN_CIPHER_SUITE_WEP40:
 142         case WLAN_CIPHER_SUITE_TKIP:
 143         case WLAN_CIPHER_SUITE_WEP104:
 144                 if (IS_ERR(sdata->local->wep_tx_tfm))
 145                         return -EINVAL;
 146                 break;
 147         default:
 148                 break;
 149         }
 150
 151         key = ieee80211_key_alloc(params->cipher, key_idx, params->key_len,
 152                                   params->key, params->seq_len, params->seq);
 153         if (IS_ERR(key))
 154                 return PTR_ERR(key);
 155
 156         if (pairwise)
 157                 key->conf.flags |= IEEE80211_KEY_FLAG_PAIRWISE;
 158
 159         mutex_lock(&sdata->local->sta_mtx);
 160
 161         if (mac_addr) {
 162                 if (ieee80211_vif_is_mesh(&sdata->vif))
 163                         sta = sta_info_get(sdata, mac_addr);
 164                 else
 165                         sta = sta_info_get_bss(sdata, mac_addr);
 166                 if (!sta) {
 167                         ieee80211_key_free(sdata->local, key);
 168                         err = -ENOENT;
 169                         goto out_unlock;
 170                 }
 171         }
 172
 173         err = ieee80211_key_link(key, sdata, sta);
 174         if (err)
 175                 ieee80211_key_free(sdata->local, key);
 176
 177  out_unlock:
 178         mutex_unlock(&sdata->local->sta_mtx);
 179
 180         return err;
 181 }
 182
 183 static int ieee80211_del_key(struct wiphy *wiphy, struct net_device *dev,
 184                              u8 key_idx, bool pairwise, const u8 *mac_addr)
 185 {
 186         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 187         struct ieee80211_local *local = sdata->local;
 188         struct sta_info *sta;
 189         struct ieee80211_key *key = NULL;
 190         int ret;
 191
 192         mutex_lock(&local->sta_mtx);
 193         mutex_lock(&local->key_mtx);
 194
 195         if (mac_addr) {
 196                 ret = -ENOENT;
 197
 198                 sta = sta_info_get_bss(sdata, mac_addr);
 199                 if (!sta)
 200                         goto out_unlock;
 201
 202                 if (pairwise)
 203                         key = key_mtx_dereference(local, sta->ptk);
 204                 else
 205                         key = key_mtx_dereference(local, sta->gtk[key_idx]);
 206         } else
 207                 key = key_mtx_dereference(local, sdata->keys[key_idx]);
 208
 209         if (!key) {
 210                 ret = -ENOENT;
 211                 goto out_unlock;
 212         }
 213
 214         __ieee80211_key_free(key);
 215
 216         ret = 0;
 217  out_unlock:
 218         mutex_unlock(&local->key_mtx);
 219         mutex_unlock(&local->sta_mtx);
 220
 221         return ret;
 222 }
 223
 224 static int ieee80211_get_key(struct wiphy *wiphy, struct net_device *dev,
 225                              u8 key_idx, bool pairwise, const u8 *mac_addr,
 226                              void *cookie,
 227                              void (*callback)(void *cookie,
 228                                               struct key_params *params))
 229 {
 230         struct ieee80211_sub_if_data *sdata;
 231         struct sta_info *sta = NULL;
 232         u8 seq[6] = {0};
 233         struct key_params params;
 234         struct ieee80211_key *key = NULL;
 235         u64 pn64;
 236         u32 iv32;
 237         u16 iv16;
 238         int err = -ENOENT;
 239
 240         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 241
 242         rcu_read_lock();
 243
 244         if (mac_addr) {
 245                 sta = sta_info_get_bss(sdata, mac_addr);
 246                 if (!sta)
 247                         goto out;
 248
 249                 if (pairwise)
 250                         key = rcu_dereference(sta->ptk);
 251                 else if (key_idx < NUM_DEFAULT_KEYS)
 252                         key = rcu_dereference(sta->gtk[key_idx]);
 253         } else
 254                 key = rcu_dereference(sdata->keys[key_idx]);
 255
 256         if (!key)
 257                 goto out;
 258
 259         memset(&params, 0, sizeof(params));
 260
 261         params.cipher = key->conf.cipher;
 262
 263         switch (key->conf.cipher) {
 264         case WLAN_CIPHER_SUITE_TKIP:
 265                 iv32 = key->u.tkip.tx.iv32;
 266                 iv16 = key->u.tkip.tx.iv16;
 267
 268                 if (key->flags & KEY_FLAG_UPLOADED_TO_HARDWARE)
 269                         drv_get_tkip_seq(sdata->local,
 270                                          key->conf.hw_key_idx,
 271                                          &iv32, &iv16);
 272
 273                 seq[0] = iv16 & 0xff;
 274                 seq[1] = (iv16 >> 8) & 0xff;
 275                 seq[2] = iv32 & 0xff;
 276                 seq[3] = (iv32 >> 8) & 0xff;
 277                 seq[4] = (iv32 >> 16) & 0xff;
 278                 seq[5] = (iv32 >> 24) & 0xff;
 279                 params.seq = seq;
 280                 params.seq_len = 6;
 281                 break;
 282         case WLAN_CIPHER_SUITE_CCMP:
 283                 pn64 = atomic64_read(&key->u.ccmp.tx_pn);
 284                 seq[0] = pn64;
 285                 seq[1] = pn64 >> 8;
 286                 seq[2] = pn64 >> 16;
 287                 seq[3] = pn64 >> 24;
 288                 seq[4] = pn64 >> 32;
 289                 seq[5] = pn64 >> 40;
 290                 params.seq = seq;
 291                 params.seq_len = 6;
 292                 break;
 293         case WLAN_CIPHER_SUITE_AES_CMAC:
 294                 pn64 = atomic64_read(&key->u.aes_cmac.tx_pn);
 295                 seq[0] = pn64;
 296                 seq[1] = pn64 >> 8;
 297                 seq[2] = pn64 >> 16;
 298                 seq[3] = pn64 >> 24;
 299                 seq[4] = pn64 >> 32;
 300                 seq[5] = pn64 >> 40;
 301                 params.seq = seq;
 302                 params.seq_len = 6;
 303                 break;
 304         }
 305
 306         params.key = key->conf.key;
 307         params.key_len = key->conf.keylen;
 308
 309         callback(cookie, &params);
 310         err = 0;
 311
 312  out:
 313         rcu_read_unlock();
 314         return err;
 315 }
 316
 317 static int ieee80211_config_default_key(struct wiphy *wiphy,
 318                                         struct net_device *dev,
 319                                         u8 key_idx, bool uni,
 320                                         bool multi)
 321 {
 322         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 323
 324         ieee80211_set_default_key(sdata, key_idx, uni, multi);
 325
 326         return 0;
 327 }
 328
 329 static int ieee80211_config_default_mgmt_key(struct wiphy *wiphy,
 330                                              struct net_device *dev,
 331                                              u8 key_idx)
 332 {
 333         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 334
 335         ieee80211_set_default_mgmt_key(sdata, key_idx);
 336
 337         return 0;
 338 }
 339
 340 static void rate_idx_to_bitrate(struct rate_info *rate, struct sta_info *sta, int idx)
 341 {
 342         if (!(rate->flags & RATE_INFO_FLAGS_MCS)) {
 343                 struct ieee80211_supported_band *sband;
 344                 sband = sta->local->hw.wiphy->bands[
 345                                 sta->local->oper_channel->band];
 346                 rate->legacy = sband->bitrates[idx].bitrate;
 347         } else
 348                 rate->mcs = idx;
 349 }
 350
 351 void sta_set_rate_info_tx(struct sta_info *sta,
 352                           const struct ieee80211_tx_rate *rate,
 353                           struct rate_info *rinfo)
 354 {
 355         rinfo->flags = 0;
 356         if (rate->flags & IEEE80211_TX_RC_MCS)
 357                 rinfo->flags |= RATE_INFO_FLAGS_MCS;
 358         if (rate->flags & IEEE80211_TX_RC_40_MHZ_WIDTH)
 359                 rinfo->flags |= RATE_INFO_FLAGS_40_MHZ_WIDTH;
 360         if (rate->flags & IEEE80211_TX_RC_SHORT_GI)
 361                 rinfo->flags |= RATE_INFO_FLAGS_SHORT_GI;
 362         rate_idx_to_bitrate(rinfo, sta, rate->idx);
 363 }
 364
 365 static void sta_set_sinfo(struct sta_info *sta, struct station_info *sinfo)
 366 {
 367         struct ieee80211_sub_if_data *sdata = sta->sdata;
 368         struct ieee80211_local *local = sdata->local;
 369         struct timespec uptime;
 370
 371         sinfo->generation = sdata->local->sta_generation;
 372
 373         sinfo->filled = STATION_INFO_INACTIVE_TIME |
 374                         STATION_INFO_RX_BYTES |
 375                         STATION_INFO_TX_BYTES |
 376                         STATION_INFO_RX_PACKETS |
 377                         STATION_INFO_TX_PACKETS |
 378                         STATION_INFO_TX_RETRIES |
 379                         STATION_INFO_TX_FAILED |
 380                         STATION_INFO_TX_BITRATE |
 381                         STATION_INFO_RX_BITRATE |
 382                         STATION_INFO_RX_DROP_MISC |
 383                         STATION_INFO_BSS_PARAM |
 384                         STATION_INFO_CONNECTED_TIME |
 385                         STATION_INFO_STA_FLAGS |
 386                         STATION_INFO_BEACON_LOSS_COUNT;
 387
 388         do_posix_clock_monotonic_gettime(&uptime);
 389         sinfo->connected_time = uptime.tv_sec - sta->last_connected;
 390
 391         sinfo->inactive_time = jiffies_to_msecs(jiffies - sta->last_rx);
 392         sinfo->rx_bytes = sta->rx_bytes;
 393         sinfo->tx_bytes = sta->tx_bytes;
 394         sinfo->rx_packets = sta->rx_packets;
 395         sinfo->tx_packets = sta->tx_packets;
 396         sinfo->tx_retries = sta->tx_retry_count;
 397         sinfo->tx_failed = sta->tx_retry_failed;
 398         sinfo->rx_dropped_misc = sta->rx_dropped;
 399         sinfo->beacon_loss_count = sta->beacon_loss_count;
 400
 401         if ((sta->local->hw.flags & IEEE80211_HW_SIGNAL_DBM) ||
 402             (sta->local->hw.flags & IEEE80211_HW_SIGNAL_UNSPEC)) {
 403                 sinfo->filled |= STATION_INFO_SIGNAL | STATION_INFO_SIGNAL_AVG;
 404                 if (!local->ops->get_rssi ||
 405                     drv_get_rssi(local, sdata, &sta->sta, &sinfo->signal))
 406                         sinfo->signal = (s8)sta->last_signal;
 407                 sinfo->signal_avg = (s8) -ewma_read(&sta->avg_signal);
 408         }
 409
 410         sta_set_rate_info_tx(sta, &sta->last_tx_rate, &sinfo->txrate);
 411
 412         sinfo->rxrate.flags = 0;
 413         if (sta->last_rx_rate_flag & RX_FLAG_HT)
 414                 sinfo->rxrate.flags |= RATE_INFO_FLAGS_MCS;
 415         if (sta->last_rx_rate_flag & RX_FLAG_40MHZ)
 416                 sinfo->rxrate.flags |= RATE_INFO_FLAGS_40_MHZ_WIDTH;
 417         if (sta->last_rx_rate_flag & RX_FLAG_SHORT_GI)
 418                 sinfo->rxrate.flags |= RATE_INFO_FLAGS_SHORT_GI;
 419         rate_idx_to_bitrate(&sinfo->rxrate, sta, sta->last_rx_rate_idx);
 420
 421         if (ieee80211_vif_is_mesh(&sdata->vif)) {
 422 #ifdef CONFIG_MAC80211_MESH
 423                 sinfo->filled |= STATION_INFO_LLID |
 424                                  STATION_INFO_PLID |
 425                                  STATION_INFO_PLINK_STATE;
 426
 427                 sinfo->llid = le16_to_cpu(sta->llid);
 428                 sinfo->plid = le16_to_cpu(sta->plid);
 429                 sinfo->plink_state = sta->plink_state;
 430                 if (test_sta_flag(sta, WLAN_STA_TOFFSET_KNOWN)) {
 431                         sinfo->filled |= STATION_INFO_T_OFFSET;
 432                         sinfo->t_offset = sta->t_offset;
 433                 }
 434 #endif
 435         }
 436
 437         sinfo->bss_param.flags = 0;
 438         if (sdata->vif.bss_conf.use_cts_prot)
 439                 sinfo->bss_param.flags |= BSS_PARAM_FLAGS_CTS_PROT;
 440         if (sdata->vif.bss_conf.use_short_preamble)
 441                 sinfo->bss_param.flags |= BSS_PARAM_FLAGS_SHORT_PREAMBLE;
 442         if (sdata->vif.bss_conf.use_short_slot)
 443                 sinfo->bss_param.flags |= BSS_PARAM_FLAGS_SHORT_SLOT_TIME;
 444         sinfo->bss_param.dtim_period = sdata->local->hw.conf.ps_dtim_period;
 445         sinfo->bss_param.beacon_interval = sdata->vif.bss_conf.beacon_int;
 446
 447         sinfo->sta_flags.set = 0;
 448         sinfo->sta_flags.mask = BIT(NL80211_STA_FLAG_AUTHORIZED) |
 449                                 BIT(NL80211_STA_FLAG_SHORT_PREAMBLE) |
 450                                 BIT(NL80211_STA_FLAG_WME) |
 451                                 BIT(NL80211_STA_FLAG_MFP) |
 452                                 BIT(NL80211_STA_FLAG_AUTHENTICATED) |
 453                                 BIT(NL80211_STA_FLAG_TDLS_PEER);
 454         if (test_sta_flag(sta, WLAN_STA_AUTHORIZED))
 455                 sinfo->sta_flags.set |= BIT(NL80211_STA_FLAG_AUTHORIZED);
 456         if (test_sta_flag(sta, WLAN_STA_SHORT_PREAMBLE))
 457                 sinfo->sta_flags.set |= BIT(NL80211_STA_FLAG_SHORT_PREAMBLE);
 458         if (test_sta_flag(sta, WLAN_STA_WME))
 459                 sinfo->sta_flags.set |= BIT(NL80211_STA_FLAG_WME);
 460         if (test_sta_flag(sta, WLAN_STA_MFP))
 461                 sinfo->sta_flags.set |= BIT(NL80211_STA_FLAG_MFP);
 462         if (test_sta_flag(sta, WLAN_STA_AUTH))
 463                 sinfo->sta_flags.set |= BIT(NL80211_STA_FLAG_AUTHENTICATED);
 464         if (test_sta_flag(sta, WLAN_STA_TDLS_PEER))
 465                 sinfo->sta_flags.set |= BIT(NL80211_STA_FLAG_TDLS_PEER);
 466 }
 467
 468 static const char ieee80211_gstrings_sta_stats[][ETH_GSTRING_LEN] = {
 469         "rx_packets", "rx_bytes", "wep_weak_iv_count",
 470         "rx_duplicates", "rx_fragments", "rx_dropped",
 471         "tx_packets", "tx_bytes", "tx_fragments",
 472         "tx_filtered", "tx_retry_failed", "tx_retries",
 473         "beacon_loss", "sta_state", "txrate", "rxrate", "signal",
 474         "channel", "noise", "ch_time", "ch_time_busy",
 475         "ch_time_ext_busy", "ch_time_rx", "ch_time_tx"
 476 };
 477 #define STA_STATS_LEN   ARRAY_SIZE(ieee80211_gstrings_sta_stats)
 478
 479 static int ieee80211_get_et_sset_count(struct wiphy *wiphy,
 480                                        struct net_device *dev,
 481                                        int sset)
 482 {
 483         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 484         int rv = 0;
 485
 486         if (sset == ETH_SS_STATS)
 487                 rv += STA_STATS_LEN;
 488
 489         rv += drv_get_et_sset_count(sdata, sset);
 490
 491         if (rv == 0)
 492                 return -EOPNOTSUPP;
 493         return rv;
 494 }
 495
 496 static void ieee80211_get_et_stats(struct wiphy *wiphy,
 497                                    struct net_device *dev,
 498                                    struct ethtool_stats *stats,
 499                                    u64 *data)
 500 {
 501         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 502         struct sta_info *sta;
 503         struct ieee80211_local *local = sdata->local;
 504         struct station_info sinfo;
 505         struct survey_info survey;
 506         int i, q;
 507 #define STA_STATS_SURVEY_LEN 7
 508
 509         memset(data, 0, sizeof(u64) * STA_STATS_LEN);
 510
 511 #define ADD_STA_STATS(sta)                              \
 512         do {                                            \
 513                 data[i++] += sta->rx_packets;           \
 514                 data[i++] += sta->rx_bytes;             \
 515                 data[i++] += sta->wep_weak_iv_count;    \
 516                 data[i++] += sta->num_duplicates;       \
 517                 data[i++] += sta->rx_fragments;         \
 518                 data[i++] += sta->rx_dropped;           \
 519                                                         \
 520                 data[i++] += sta->tx_packets;           \
 521                 data[i++] += sta->tx_bytes;             \
 522                 data[i++] += sta->tx_fragments;         \
 523                 data[i++] += sta->tx_filtered_count;    \
 524                 data[i++] += sta->tx_retry_failed;      \
 525                 data[i++] += sta->tx_retry_count;       \
 526                 data[i++] += sta->beacon_loss_count;    \
 527         } while (0)
 528
 529         /* For Managed stations, find the single station based on BSSID
 530          * and use that.  For interface types, iterate through all available
 531          * stations and add stats for any station that is assigned to this
 532          * network device.
 533          */
 534
 535         mutex_lock(&local->sta_mtx);
 536
 537         if (sdata->vif.type == NL80211_IFTYPE_STATION) {
 538                 sta = sta_info_get_bss(sdata, sdata->u.mgd.bssid);
 539
 540                 if (!(sta && !WARN_ON(sta->sdata->dev != dev)))
 541                         goto do_survey;
 542
 543                 i = 0;
 544                 ADD_STA_STATS(sta);
 545
 546                 data[i++] = sta->sta_state;
 547
 548                 sinfo.filled = 0;
 549                 sta_set_sinfo(sta, &sinfo);
 550
 551                 if (sinfo.filled & STATION_INFO_TX_BITRATE)
 552                         data[i] = 100000 *
 553                                 cfg80211_calculate_bitrate(&sinfo.txrate);
 554                 i++;
 555                 if (sinfo.filled & STATION_INFO_RX_BITRATE)
 556                         data[i] = 100000 *
 557                                 cfg80211_calculate_bitrate(&sinfo.rxrate);
 558                 i++;
 559
 560                 if (sinfo.filled & STATION_INFO_SIGNAL_AVG)
 561                         data[i] = (u8)sinfo.signal_avg;
 562                 i++;
 563         } else {
 564                 list_for_each_entry(sta, &local->sta_list, list) {
 565                         /* Make sure this station belongs to the proper dev */
 566                         if (sta->sdata->dev != dev)
 567                                 continue;
 568
 569                         i = 0;
 570                         ADD_STA_STATS(sta);
 571                 }
 572         }
 573
 574 do_survey:
 575         i = STA_STATS_LEN - STA_STATS_SURVEY_LEN;
 576         /* Get survey stats for current channel */
 577         q = 0;
 578         while (true) {
 579                 survey.filled = 0;
 580                 if (drv_get_survey(local, q, &survey) != 0) {
 581                         survey.filled = 0;
 582                         break;
 583                 }
 584
 585                 if (survey.channel &&
 586                     (local->oper_channel->center_freq ==
 587                      survey.channel->center_freq))
 588                         break;
 589                 q++;
 590         }
 591
 592         if (survey.filled)
 593                 data[i++] = survey.channel->center_freq;
 594         else
 595                 data[i++] = 0;
 596         if (survey.filled & SURVEY_INFO_NOISE_DBM)
 597                 data[i++] = (u8)survey.noise;
 598         else
 599                 data[i++] = -1LL;
 600         if (survey.filled & SURVEY_INFO_CHANNEL_TIME)
 601                 data[i++] = survey.channel_time;
 602         else
 603                 data[i++] = -1LL;
 604         if (survey.filled & SURVEY_INFO_CHANNEL_TIME_BUSY)
 605                 data[i++] = survey.channel_time_busy;
 606         else
 607                 data[i++] = -1LL;
 608         if (survey.filled & SURVEY_INFO_CHANNEL_TIME_EXT_BUSY)
 609                 data[i++] = survey.channel_time_ext_busy;
 610         else
 611                 data[i++] = -1LL;
 612         if (survey.filled & SURVEY_INFO_CHANNEL_TIME_RX)
 613                 data[i++] = survey.channel_time_rx;
 614         else
 615                 data[i++] = -1LL;
 616         if (survey.filled & SURVEY_INFO_CHANNEL_TIME_TX)
 617                 data[i++] = survey.channel_time_tx;
 618         else
 619                 data[i++] = -1LL;
 620
 621         mutex_unlock(&local->sta_mtx);
 622
 623         if (WARN_ON(i != STA_STATS_LEN))
 624                 return;
 625
 626         drv_get_et_stats(sdata, stats, &(data[STA_STATS_LEN]));
 627 }
 628
 629 static void ieee80211_get_et_strings(struct wiphy *wiphy,
 630                                      struct net_device *dev,
 631                                      u32 sset, u8 *data)
 632 {
 633         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 634         int sz_sta_stats = 0;
 635
 636         if (sset == ETH_SS_STATS) {
 637                 sz_sta_stats = sizeof(ieee80211_gstrings_sta_stats);
 638                 memcpy(data, *ieee80211_gstrings_sta_stats, sz_sta_stats);
 639         }
 640         drv_get_et_strings(sdata, sset, &(data[sz_sta_stats]));
 641 }
 642
 643 static int ieee80211_dump_station(struct wiphy *wiphy, struct net_device *dev,
 644                                  int idx, u8 *mac, struct station_info *sinfo)
 645 {
 646         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 647         struct ieee80211_local *local = sdata->local;
 648         struct sta_info *sta;
 649         int ret = -ENOENT;
 650
 651         mutex_lock(&local->sta_mtx);
 652
 653         sta = sta_info_get_by_idx(sdata, idx);
 654         if (sta) {
 655                 ret = 0;
 656                 memcpy(mac, sta->sta.addr, ETH_ALEN);
 657                 sta_set_sinfo(sta, sinfo);
 658         }
 659
 660         mutex_unlock(&local->sta_mtx);
 661
 662         return ret;
 663 }
 664
 665 static int ieee80211_dump_survey(struct wiphy *wiphy, struct net_device *dev,
 666                                  int idx, struct survey_info *survey)
 667 {
 668         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
 669
 670         return drv_get_survey(local, idx, survey);
 671 }
 672
 673 static int ieee80211_get_station(struct wiphy *wiphy, struct net_device *dev,
 674                                  u8 *mac, struct station_info *sinfo)
 675 {
 676         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 677         struct ieee80211_local *local = sdata->local;
 678         struct sta_info *sta;
 679         int ret = -ENOENT;
 680
 681         mutex_lock(&local->sta_mtx);
 682
 683         sta = sta_info_get_bss(sdata, mac);
 684         if (sta) {
 685                 ret = 0;
 686                 sta_set_sinfo(sta, sinfo);
 687         }
 688
 689         mutex_unlock(&local->sta_mtx);
 690
 691         return ret;
 692 }
 693
 694 static int ieee80211_set_channel(struct wiphy *wiphy,
 695                                  struct net_device *netdev,
 696                                  struct ieee80211_channel *chan,
 697                                  enum nl80211_channel_type channel_type)
 698 {
 699         struct ieee80211_local *local = wiphy_priv(wiphy);
 700         struct ieee80211_sub_if_data *sdata = NULL;
 701
 702         if (netdev)
 703                 sdata = IEEE80211_DEV_TO_SUB_IF(netdev);
 704
 705         switch (ieee80211_get_channel_mode(local, NULL)) {
 706         case CHAN_MODE_HOPPING:
 707                 return -EBUSY;
 708         case CHAN_MODE_FIXED:
 709                 if (local->oper_channel != chan ||
 710                     (!sdata && local->_oper_channel_type != channel_type))
 711                         return -EBUSY;
 712                 if (!sdata && local->_oper_channel_type == channel_type)
 713                         return 0;
 714                 break;
 715         case CHAN_MODE_UNDEFINED:
 716                 break;
 717         }
 718
 719         if (!ieee80211_set_channel_type(local, sdata, channel_type))
 720                 return -EBUSY;
 721
 722         local->oper_channel = chan;
 723
 724         /* auto-detects changes */
 725         ieee80211_hw_config(local, 0);
 726
 727         return 0;
 728 }
 729
 730 static int ieee80211_set_monitor_channel(struct wiphy *wiphy,
 731                                          struct ieee80211_channel *chan,
 732                                          enum nl80211_channel_type channel_type)
 733 {
 734         return ieee80211_set_channel(wiphy, NULL, chan, channel_type);
 735 }
 736
 737 static int ieee80211_set_probe_resp(struct ieee80211_sub_if_data *sdata,
 738                                     const u8 *resp, size_t resp_len)
 739 {
 740         struct probe_resp *new, *old;
 741
 742         if (!resp || !resp_len)
 743                 return 1;
 744
 745         old = rtnl_dereference(sdata->u.ap.probe_resp);
 746
 747         new = kzalloc(sizeof(struct probe_resp) + resp_len, GFP_KERNEL);
 748         if (!new)
 749                 return -ENOMEM;
 750
 751         new->len = resp_len;
 752         memcpy(new->data, resp, resp_len);
 753
 754         rcu_assign_pointer(sdata->u.ap.probe_resp, new);
 755         if (old)
 756                 kfree_rcu(old, rcu_head);
 757
 758         return 0;
 759 }
 760
 761 static int ieee80211_assign_beacon(struct ieee80211_sub_if_data *sdata,
 762                                    struct cfg80211_beacon_data *params)
 763 {
 764         struct beacon_data *new, *old;
 765         int new_head_len, new_tail_len;
 766         int size, err;
 767         u32 changed = BSS_CHANGED_BEACON;
 768
 769         old = rtnl_dereference(sdata->u.ap.beacon);
 770
 771         /* Need to have a beacon head if we don't have one yet */
 772         if (!params->head && !old)
 773                 return -EINVAL;
 774
 775         /* new or old head? */
 776         if (params->head)
 777                 new_head_len = params->head_len;
 778         else
 779                 new_head_len = old->head_len;
 780
 781         /* new or old tail? */
 782         if (params->tail || !old)
 783                 /* params->tail_len will be zero for !params->tail */
 784                 new_tail_len = params->tail_len;
 785         else
 786                 new_tail_len = old->tail_len;
 787
 788         size = sizeof(*new) + new_head_len + new_tail_len;
 789
 790         new = kzalloc(size, GFP_KERNEL);
 791         if (!new)
 792                 return -ENOMEM;
 793
 794         /* start filling the new info now */
 795
 796         /*
 797          * pointers go into the block we allocated,
 798          * memory is | beacon_data | head | tail |
 799          */
 800         new->head = ((u8 *) new) + sizeof(*new);
 801         new->tail = new->head + new_head_len;
 802         new->head_len = new_head_len;
 803         new->tail_len = new_tail_len;
 804
 805         /* copy in head */
 806         if (params->head)
 807                 memcpy(new->head, params->head, new_head_len);
 808         else
 809                 memcpy(new->head, old->head, new_head_len);
 810
 811         /* copy in optional tail */
 812         if (params->tail)
 813                 memcpy(new->tail, params->tail, new_tail_len);
 814         else
 815                 if (old)
 816                         memcpy(new->tail, old->tail, new_tail_len);
 817
 818         err = ieee80211_set_probe_resp(sdata, params->probe_resp,
 819                                        params->probe_resp_len);
 820         if (err < 0)
 821                 return err;
 822         if (err == 0)
 823                 changed |= BSS_CHANGED_AP_PROBE_RESP;
 824
 825         rcu_assign_pointer(sdata->u.ap.beacon, new);
 826
 827         if (old)
 828                 kfree_rcu(old, rcu_head);
 829
 830         return changed;
 831 }
 832
 833 static int ieee80211_start_ap(struct wiphy *wiphy, struct net_device *dev,
 834                               struct cfg80211_ap_settings *params)
 835 {
 836         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 837         struct beacon_data *old;
 838         struct ieee80211_sub_if_data *vlan;
 839         u32 changed = BSS_CHANGED_BEACON_INT |
 840                       BSS_CHANGED_BEACON_ENABLED |
 841                       BSS_CHANGED_BEACON |
 842                       BSS_CHANGED_SSID;
 843         int err;
 844
 845         old = rtnl_dereference(sdata->u.ap.beacon);
 846         if (old)
 847                 return -EALREADY;
 848
 849         err = ieee80211_set_channel(wiphy, dev, params->channel,
 850                                     params->channel_type);
 851         if (err)
 852                 return err;
 853
 854         /*
 855          * Apply control port protocol, this allows us to
 856          * not encrypt dynamic WEP control frames.
 857          */
 858         sdata->control_port_protocol = params->crypto.control_port_ethertype;
 859         sdata->control_port_no_encrypt = params->crypto.control_port_no_encrypt;
 860         list_for_each_entry(vlan, &sdata->u.ap.vlans, u.vlan.list) {
 861                 vlan->control_port_protocol =
 862                         params->crypto.control_port_ethertype;
 863                 vlan->control_port_no_encrypt =
 864                         params->crypto.control_port_no_encrypt;
 865         }
 866
 867         sdata->vif.bss_conf.beacon_int = params->beacon_interval;
 868         sdata->vif.bss_conf.dtim_period = params->dtim_period;
 869
 870         sdata->vif.bss_conf.ssid_len = params->ssid_len;
 871         if (params->ssid_len)
 872                 memcpy(sdata->vif.bss_conf.ssid, params->ssid,
 873                        params->ssid_len);
 874         sdata->vif.bss_conf.hidden_ssid =
 875                 (params->hidden_ssid != NL80211_HIDDEN_SSID_NOT_IN_USE);
 876
 877         err = ieee80211_assign_beacon(sdata, &params->beacon);
 878         if (err < 0)
 879                 return err;
 880         changed |= err;
 881
 882         ieee80211_bss_info_change_notify(sdata, changed);
 883
 884         netif_carrier_on(dev);
 885         list_for_each_entry(vlan, &sdata->u.ap.vlans, u.vlan.list)
 886                 netif_carrier_on(vlan->dev);
 887
 888         return 0;
 889 }
 890
 891 static int ieee80211_change_beacon(struct wiphy *wiphy, struct net_device *dev,
 892                                    struct cfg80211_beacon_data *params)
 893 {
 894         struct ieee80211_sub_if_data *sdata;
 895         struct beacon_data *old;
 896         int err;
 897
 898         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 899
 900         old = rtnl_dereference(sdata->u.ap.beacon);
 901         if (!old)
 902                 return -ENOENT;
 903
 904         err = ieee80211_assign_beacon(sdata, params);
 905         if (err < 0)
 906                 return err;
 907         ieee80211_bss_info_change_notify(sdata, err);
 908         return 0;
 909 }
 910
 911 static int ieee80211_stop_ap(struct wiphy *wiphy, struct net_device *dev)
 912 {
 913         struct ieee80211_sub_if_data *sdata, *vlan;
 914         struct beacon_data *old;
 915
 916         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 917
 918         old = rtnl_dereference(sdata->u.ap.beacon);
 919         if (!old)
 920                 return -ENOENT;
 921
 922         list_for_each_entry(vlan, &sdata->u.ap.vlans, u.vlan.list)
 923                 netif_carrier_off(vlan->dev);
 924         netif_carrier_off(dev);
 925
 926         RCU_INIT_POINTER(sdata->u.ap.beacon, NULL);
 927
 928         kfree_rcu(old, rcu_head);
 929
 930         sta_info_flush(sdata->local, sdata);
 931         ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BEACON_ENABLED);
 932
 933         return 0;
 934 }
 935
 936 /* Layer 2 Update frame (802.2 Type 1 LLC XID Update response) */
 937 struct iapp_layer2_update {
 938         u8 da[ETH_ALEN];        /* broadcast */
 939         u8 sa[ETH_ALEN];        /* STA addr */
 940         __be16 len;             /* 6 */
 941         u8 dsap;                /* 0 */
 942         u8 ssap;                /* 0 */
 943         u8 control;
 944         u8 xid_info[3];
 945 } __packed;
 946
 947 static void ieee80211_send_layer2_update(struct sta_info *sta)
 948 {
 949         struct iapp_layer2_update *msg;
 950         struct sk_buff *skb;
 951
 952         /* Send Level 2 Update Frame to update forwarding tables in layer 2
 953          * bridge devices */
 954
 955         skb = dev_alloc_skb(sizeof(*msg));
 956         if (!skb)
 957                 return;
 958         msg = (struct iapp_layer2_update *)skb_put(skb, sizeof(*msg));
 959
 960         /* 802.2 Type 1 Logical Link Control (LLC) Exchange Identifier (XID)
 961          * Update response frame; IEEE Std 802.2-1998, 5.4.1.2.1 */
 962
 963         eth_broadcast_addr(msg->da);
 964         memcpy(msg->sa, sta->sta.addr, ETH_ALEN);
 965         msg->len = htons(6);
 966         msg->dsap = 0;
 967         msg->ssap = 0x01;       /* NULL LSAP, CR Bit: Response */
 968         msg->control = 0xaf;    /* XID response lsb.1111F101.
 969                                  * F=0 (no poll command; unsolicited frame) */
 970         msg->xid_info[0] = 0x81;        /* XID format identifier */
 971         msg->xid_info[1] = 1;   /* LLC types/classes: Type 1 LLC */
 972         msg->xid_info[2] = 0;   /* XID sender's receive window size (RW) */
 973
 974         skb->dev = sta->sdata->dev;
 975         skb->protocol = eth_type_trans(skb, sta->sdata->dev);
 976         memset(skb->cb, 0, sizeof(skb->cb));
 977         netif_rx_ni(skb);
 978 }
 979
 980 static int sta_apply_parameters(struct ieee80211_local *local,
 981                                 struct sta_info *sta,
 982                                 struct station_parameters *params)
 983 {
 984         int ret = 0;
 985         u32 rates;
 986         int i, j;
 987         struct ieee80211_supported_band *sband;
 988         struct ieee80211_sub_if_data *sdata = sta->sdata;
 989         u32 mask, set;
 990
 991         sband = local->hw.wiphy->bands[local->oper_channel->band];
 992
 993         mask = params->sta_flags_mask;
 994         set = params->sta_flags_set;
 995
 996         /*
 997          * In mesh mode, we can clear AUTHENTICATED flag but must
 998          * also make ASSOCIATED follow appropriately for the driver
 999          * API. See also below, after AUTHORIZED changes.
1000          */
1001         if (mask & BIT(NL80211_STA_FLAG_AUTHENTICATED)) {
1002                 /* cfg80211 should not allow this in non-mesh modes */
1003                 if (WARN_ON(!ieee80211_vif_is_mesh(&sdata->vif)))
1004                         return -EINVAL;
1005
1006                 if (set & BIT(NL80211_STA_FLAG_AUTHENTICATED) &&
1007                     !test_sta_flag(sta, WLAN_STA_AUTH)) {
1008                         ret = sta_info_move_state(sta, IEEE80211_STA_AUTH);
1009                         if (ret)
1010                                 return ret;
1011                         ret = sta_info_move_state(sta, IEEE80211_STA_ASSOC);
1012                         if (ret)
1013                                 return ret;
1014                 }
1015         }
1016
1017         if (mask & BIT(NL80211_STA_FLAG_AUTHORIZED)) {
1018                 if (set & BIT(NL80211_STA_FLAG_AUTHORIZED))
1019                         ret = sta_info_move_state(sta, IEEE80211_STA_AUTHORIZED);
1020                 else if (test_sta_flag(sta, WLAN_STA_AUTHORIZED))
1021                         ret = sta_info_move_state(sta, IEEE80211_STA_ASSOC);
1022                 if (ret)
1023                         return ret;
1024         }
1025
1026         if (mask & BIT(NL80211_STA_FLAG_AUTHENTICATED)) {
1027                 /* cfg80211 should not allow this in non-mesh modes */
1028                 if (WARN_ON(!ieee80211_vif_is_mesh(&sdata->vif)))
1029                         return -EINVAL;
1030
1031                 if (!(set & BIT(NL80211_STA_FLAG_AUTHENTICATED)) &&
1032                     test_sta_flag(sta, WLAN_STA_AUTH)) {
1033                         ret = sta_info_move_state(sta, IEEE80211_STA_AUTH);
1034                         if (ret)
1035                                 return ret;
1036                         ret = sta_info_move_state(sta, IEEE80211_STA_NONE);
1037                         if (ret)
1038                                 return ret;
1039                 }
1040         }
1041
1042
1043         if (mask & BIT(NL80211_STA_FLAG_SHORT_PREAMBLE)) {
1044                 if (set & BIT(NL80211_STA_FLAG_SHORT_PREAMBLE))
1045                         set_sta_flag(sta, WLAN_STA_SHORT_PREAMBLE);
1046                 else
1047                         clear_sta_flag(sta, WLAN_STA_SHORT_PREAMBLE);
1048         }
1049
1050         if (mask & BIT(NL80211_STA_FLAG_WME)) {
1051                 if (set & BIT(NL80211_STA_FLAG_WME)) {
1052                         set_sta_flag(sta, WLAN_STA_WME);
1053                         sta->sta.wme = true;
1054                 } else {
1055                         clear_sta_flag(sta, WLAN_STA_WME);
1056                         sta->sta.wme = false;
1057                 }
1058         }
1059
1060         if (mask & BIT(NL80211_STA_FLAG_MFP)) {
1061                 if (set & BIT(NL80211_STA_FLAG_MFP))
1062                         set_sta_flag(sta, WLAN_STA_MFP);
1063                 else
1064                         clear_sta_flag(sta, WLAN_STA_MFP);
1065         }
1066
1067         if (mask & BIT(NL80211_STA_FLAG_TDLS_PEER)) {
1068                 if (set & BIT(NL80211_STA_FLAG_TDLS_PEER))
1069                         set_sta_flag(sta, WLAN_STA_TDLS_PEER);
1070                 else
1071                         clear_sta_flag(sta, WLAN_STA_TDLS_PEER);
1072         }
1073
1074         if (params->sta_modify_mask & STATION_PARAM_APPLY_UAPSD) {
1075                 sta->sta.uapsd_queues = params->uapsd_queues;
1076                 sta->sta.max_sp = params->max_sp;
1077         }
1078
1079         /*
1080          * cfg80211 validates this (1-2007) and allows setting the AID
1081          * only when creating a new station entry
1082          */
1083         if (params->aid)
1084                 sta->sta.aid = params->aid;
1085
1086         /*
1087          * FIXME: updating the following information is racy when this
1088          *        function is called from ieee80211_change_station().
1089          *        However, all this information should be static so
1090          *        maybe we should just reject attemps to change it.
1091          */
1092
1093         if (params->listen_interval >= 0)
1094                 sta->listen_interval = params->listen_interval;
1095
1096         if (params->supported_rates) {
1097                 rates = 0;
1098
1099                 for (i = 0; i < params->supported_rates_len; i++) {
1100                         int rate = (params->supported_rates[i] & 0x7f) * 5;
1101                         for (j = 0; j < sband->n_bitrates; j++) {
1102                                 if (sband->bitrates[j].bitrate == rate)
1103                                         rates |= BIT(j);
1104                         }
1105                 }
1106                 sta->sta.supp_rates[local->oper_channel->band] = rates;
1107         }
1108
1109         if (params->ht_capa)
1110                 ieee80211_ht_cap_ie_to_sta_ht_cap(sdata, sband,
1111                                                   params->ht_capa,
1112                                                   &sta->sta.ht_cap);
1113
1114         if (ieee80211_vif_is_mesh(&sdata->vif)) {
1115 #ifdef CONFIG_MAC80211_MESH
1116                 if (sdata->u.mesh.security & IEEE80211_MESH_SEC_SECURED)
1117                         switch (params->plink_state) {
1118                         case NL80211_PLINK_LISTEN:
1119                         case NL80211_PLINK_ESTAB:
1120                         case NL80211_PLINK_BLOCKED:
1121                                 sta->plink_state = params->plink_state;
1122                                 break;
1123                         default:
1124                                 /*  nothing  */
1125                                 break;
1126                         }
1127                 else
1128                         switch (params->plink_action) {
1129                         case PLINK_ACTION_OPEN:
1130                                 mesh_plink_open(sta);
1131                                 break;
1132                         case PLINK_ACTION_BLOCK:
1133                                 mesh_plink_block(sta);
1134                                 break;
1135                         }
1136 #endif
1137         }
1138
1139         return 0;
1140 }
1141
1142 static int ieee80211_add_station(struct wiphy *wiphy, struct net_device *dev,
1143                                  u8 *mac, struct station_parameters *params)
1144 {
1145         struct ieee80211_local *local = wiphy_priv(wiphy);
1146         struct sta_info *sta;
1147         struct ieee80211_sub_if_data *sdata;
1148         int err;
1149         int layer2_update;
1150
1151         if (params->vlan) {
1152                 sdata = IEEE80211_DEV_TO_SUB_IF(params->vlan);
1153
1154                 if (sdata->vif.type != NL80211_IFTYPE_AP_VLAN &&
1155                     sdata->vif.type != NL80211_IFTYPE_AP)
1156                         return -EINVAL;
1157         } else
1158                 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1159
1160         if (ether_addr_equal(mac, sdata->vif.addr))
1161                 return -EINVAL;
1162
1163         if (is_multicast_ether_addr(mac))
1164                 return -EINVAL;
1165
1166         sta = sta_info_alloc(sdata, mac, GFP_KERNEL);
1167         if (!sta)
1168                 return -ENOMEM;
1169
1170         sta_info_pre_move_state(sta, IEEE80211_STA_AUTH);
1171         sta_info_pre_move_state(sta, IEEE80211_STA_ASSOC);
1172
1173         err = sta_apply_parameters(local, sta, params);
1174         if (err) {
1175                 sta_info_free(local, sta);
1176                 return err;
1177         }
1178
1179         /*
1180          * for TDLS, rate control should be initialized only when supported
1181          * rates are known.
1182          */
1183         if (!test_sta_flag(sta, WLAN_STA_TDLS_PEER))
1184                 rate_control_rate_init(sta);
1185
1186         layer2_update = sdata->vif.type == NL80211_IFTYPE_AP_VLAN ||
1187                 sdata->vif.type == NL80211_IFTYPE_AP;
1188
1189         err = sta_info_insert_rcu(sta);
1190         if (err) {
1191                 rcu_read_unlock();
1192                 return err;
1193         }
1194
1195         if (layer2_update)
1196                 ieee80211_send_layer2_update(sta);
1197
1198         rcu_read_unlock();
1199
1200         return 0;
1201 }
1202
1203 static int ieee80211_del_station(struct wiphy *wiphy, struct net_device *dev,
1204                                  u8 *mac)
1205 {
1206         struct ieee80211_local *local = wiphy_priv(wiphy);
1207         struct ieee80211_sub_if_data *sdata;
1208
1209         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1210
1211         if (mac)
1212                 return sta_info_destroy_addr_bss(sdata, mac);
1213
1214         sta_info_flush(local, sdata);
1215         return 0;
1216 }
1217
1218 static int ieee80211_change_station(struct wiphy *wiphy,
1219                                     struct net_device *dev,
1220                                     u8 *mac,
1221                                     struct station_parameters *params)
1222 {
1223         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1224         struct ieee80211_local *local = wiphy_priv(wiphy);
1225         struct sta_info *sta;
1226         struct ieee80211_sub_if_data *vlansdata;
1227         int err;
1228
1229         mutex_lock(&local->sta_mtx);
1230
1231         sta = sta_info_get_bss(sdata, mac);
1232         if (!sta) {
1233                 mutex_unlock(&local->sta_mtx);
1234                 return -ENOENT;
1235         }
1236
1237         /* in station mode, supported rates are only valid with TDLS */
1238         if (sdata->vif.type == NL80211_IFTYPE_STATION &&
1239             params->supported_rates &&
1240             !test_sta_flag(sta, WLAN_STA_TDLS_PEER)) {
1241                 mutex_unlock(&local->sta_mtx);
1242                 return -EINVAL;
1243         }
1244
1245         if (params->vlan && params->vlan != sta->sdata->dev) {
1246                 bool prev_4addr = false;
1247                 bool new_4addr = false;
1248
1249                 vlansdata = IEEE80211_DEV_TO_SUB_IF(params->vlan);
1250
1251                 if (vlansdata->vif.type != NL80211_IFTYPE_AP_VLAN &&
1252                     vlansdata->vif.type != NL80211_IFTYPE_AP) {
1253                         mutex_unlock(&local->sta_mtx);
1254                         return -EINVAL;
1255                 }
1256
1257                 if (params->vlan->ieee80211_ptr->use_4addr) {
1258                         if (vlansdata->u.vlan.sta) {
1259                                 mutex_unlock(&local->sta_mtx);
1260                                 return -EBUSY;
1261                         }
1262
1263                         rcu_assign_pointer(vlansdata->u.vlan.sta, sta);
1264                         new_4addr = true;
1265                 }
1266
1267                 if (sta->sdata->vif.type == NL80211_IFTYPE_AP_VLAN &&
1268                     sta->sdata->u.vlan.sta) {
1269                         rcu_assign_pointer(sta->sdata->u.vlan.sta, NULL);
1270                         prev_4addr = true;
1271                 }
1272
1273                 sta->sdata = vlansdata;
1274
1275                 if (sta->sta_state == IEEE80211_STA_AUTHORIZED &&
1276                     prev_4addr != new_4addr) {
1277                         if (new_4addr)
1278                                 atomic_dec(&sta->sdata->bss->num_mcast_sta);
1279                         else
1280                                 atomic_inc(&sta->sdata->bss->num_mcast_sta);
1281                 }
1282
1283                 ieee80211_send_layer2_update(sta);
1284         }
1285
1286         err = sta_apply_parameters(local, sta, params);
1287         if (err) {
1288                 mutex_unlock(&local->sta_mtx);
1289                 return err;
1290         }
1291
1292         if (test_sta_flag(sta, WLAN_STA_TDLS_PEER) && params->supported_rates)
1293                 rate_control_rate_init(sta);
1294
1295         mutex_unlock(&local->sta_mtx);
1296
1297         if (sdata->vif.type == NL80211_IFTYPE_STATION &&
1298             params->sta_flags_mask & BIT(NL80211_STA_FLAG_AUTHORIZED)) {
1299                 ieee80211_recalc_ps(local, -1);
1300                 ieee80211_recalc_ps_vif(sdata);
1301         }
1302         return 0;
1303 }
1304
1305 #ifdef CONFIG_MAC80211_MESH
1306 static int ieee80211_add_mpath(struct wiphy *wiphy, struct net_device *dev,
1307                                  u8 *dst, u8 *next_hop)
1308 {
1309         struct ieee80211_sub_if_data *sdata;
1310         struct mesh_path *mpath;
1311         struct sta_info *sta;
1312         int err;
1313
1314         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1315
1316         rcu_read_lock();
1317         sta = sta_info_get(sdata, next_hop);
1318         if (!sta) {
1319                 rcu_read_unlock();
1320                 return -ENOENT;
1321         }
1322
1323         err = mesh_path_add(dst, sdata);
1324         if (err) {
1325                 rcu_read_unlock();
1326                 return err;
1327         }
1328
1329         mpath = mesh_path_lookup(dst, sdata);
1330         if (!mpath) {
1331                 rcu_read_unlock();
1332                 return -ENXIO;
1333         }
1334         mesh_path_fix_nexthop(mpath, sta);
1335
1336         rcu_read_unlock();
1337         return 0;
1338 }
1339
1340 static int ieee80211_del_mpath(struct wiphy *wiphy, struct net_device *dev,
1341                                  u8 *dst)
1342 {
1343         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1344
1345         if (dst)
1346                 return mesh_path_del(dst, sdata);
1347
1348         mesh_path_flush_by_iface(sdata);
1349         return 0;
1350 }
1351
1352 static int ieee80211_change_mpath(struct wiphy *wiphy,
1353                                     struct net_device *dev,
1354                                     u8 *dst, u8 *next_hop)
1355 {
1356         struct ieee80211_sub_if_data *sdata;
1357         struct mesh_path *mpath;
1358         struct sta_info *sta;
1359
1360         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1361
1362         rcu_read_lock();
1363
1364         sta = sta_info_get(sdata, next_hop);
1365         if (!sta) {
1366                 rcu_read_unlock();
1367                 return -ENOENT;
1368         }
1369
1370         mpath = mesh_path_lookup(dst, sdata);
1371         if (!mpath) {
1372                 rcu_read_unlock();
1373                 return -ENOENT;
1374         }
1375
1376         mesh_path_fix_nexthop(mpath, sta);
1377
1378         rcu_read_unlock();
1379         return 0;
1380 }
1381
1382 static void mpath_set_pinfo(struct mesh_path *mpath, u8 *next_hop,
1383                             struct mpath_info *pinfo)
1384 {
1385         struct sta_info *next_hop_sta = rcu_dereference(mpath->next_hop);
1386
1387         if (next_hop_sta)
1388                 memcpy(next_hop, next_hop_sta->sta.addr, ETH_ALEN);
1389         else
1390                 memset(next_hop, 0, ETH_ALEN);
1391
1392         memset(pinfo, 0, sizeof(*pinfo));
1393
1394         pinfo->generation = mesh_paths_generation;
1395
1396         pinfo->filled = MPATH_INFO_FRAME_QLEN |
1397                         MPATH_INFO_SN |
1398                         MPATH_INFO_METRIC |
1399                         MPATH_INFO_EXPTIME |
1400                         MPATH_INFO_DISCOVERY_TIMEOUT |
1401                         MPATH_INFO_DISCOVERY_RETRIES |
1402                         MPATH_INFO_FLAGS;
1403
1404         pinfo->frame_qlen = mpath->frame_queue.qlen;
1405         pinfo->sn = mpath->sn;
1406         pinfo->metric = mpath->metric;
1407         if (time_before(jiffies, mpath->exp_time))
1408                 pinfo->exptime = jiffies_to_msecs(mpath->exp_time - jiffies);
1409         pinfo->discovery_timeout =
1410                         jiffies_to_msecs(mpath->discovery_timeout);
1411         pinfo->discovery_retries = mpath->discovery_retries;
1412         if (mpath->flags & MESH_PATH_ACTIVE)
1413                 pinfo->flags |= NL80211_MPATH_FLAG_ACTIVE;
1414         if (mpath->flags & MESH_PATH_RESOLVING)
1415                 pinfo->flags |= NL80211_MPATH_FLAG_RESOLVING;
1416         if (mpath->flags & MESH_PATH_SN_VALID)
1417                 pinfo->flags |= NL80211_MPATH_FLAG_SN_VALID;
1418         if (mpath->flags & MESH_PATH_FIXED)
1419                 pinfo->flags |= NL80211_MPATH_FLAG_FIXED;
1420         if (mpath->flags & MESH_PATH_RESOLVED)
1421                 pinfo->flags |= NL80211_MPATH_FLAG_RESOLVED;
1422 }
1423
1424 static int ieee80211_get_mpath(struct wiphy *wiphy, struct net_device *dev,
1425                                u8 *dst, u8 *next_hop, struct mpath_info *pinfo)
1426
1427 {
1428         struct ieee80211_sub_if_data *sdata;
1429         struct mesh_path *mpath;
1430
1431         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1432
1433         rcu_read_lock();
1434         mpath = mesh_path_lookup(dst, sdata);
1435         if (!mpath) {
1436                 rcu_read_unlock();
1437                 return -ENOENT;
1438         }
1439         memcpy(dst, mpath->dst, ETH_ALEN);
1440         mpath_set_pinfo(mpath, next_hop, pinfo);
1441         rcu_read_unlock();
1442         return 0;
1443 }
1444
1445 static int ieee80211_dump_mpath(struct wiphy *wiphy, struct net_device *dev,
1446                                  int idx, u8 *dst, u8 *next_hop,
1447                                  struct mpath_info *pinfo)
1448 {
1449         struct ieee80211_sub_if_data *sdata;
1450         struct mesh_path *mpath;
1451
1452         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1453
1454         rcu_read_lock();
1455         mpath = mesh_path_lookup_by_idx(idx, sdata);
1456         if (!mpath) {
1457                 rcu_read_unlock();
1458                 return -ENOENT;
1459         }
1460         memcpy(dst, mpath->dst, ETH_ALEN);
1461         mpath_set_pinfo(mpath, next_hop, pinfo);
1462         rcu_read_unlock();
1463         return 0;
1464 }
1465
1466 static int ieee80211_get_mesh_config(struct wiphy *wiphy,
1467                                 struct net_device *dev,
1468                                 struct mesh_config *conf)
1469 {
1470         struct ieee80211_sub_if_data *sdata;
1471         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1472
1473         memcpy(conf, &(sdata->u.mesh.mshcfg), sizeof(struct mesh_config));
1474         return 0;
1475 }
1476
1477 static inline bool _chg_mesh_attr(enum nl80211_meshconf_params parm, u32 mask)
1478 {
1479         return (mask >> (parm-1)) & 0x1;
1480 }
1481
1482 static int copy_mesh_setup(struct ieee80211_if_mesh *ifmsh,
1483                 const struct mesh_setup *setup)
1484 {
1485         u8 *new_ie;
1486         const u8 *old_ie;
1487         struct ieee80211_sub_if_data *sdata = container_of(ifmsh,
1488                                         struct ieee80211_sub_if_data, u.mesh);
1489
1490         /* allocate information elements */
1491         new_ie = NULL;
1492         old_ie = ifmsh->ie;
1493
1494         if (setup->ie_len) {
1495                 new_ie = kmemdup(setup->ie, setup->ie_len,
1496                                 GFP_KERNEL);
1497                 if (!new_ie)
1498                         return -ENOMEM;
1499         }
1500         ifmsh->ie_len = setup->ie_len;
1501         ifmsh->ie = new_ie;
1502         kfree(old_ie);
1503
1504         /* now copy the rest of the setup parameters */
1505         ifmsh->mesh_id_len = setup->mesh_id_len;
1506         memcpy(ifmsh->mesh_id, setup->mesh_id, ifmsh->mesh_id_len);
1507         ifmsh->mesh_sp_id = setup->sync_method;
1508         ifmsh->mesh_pp_id = setup->path_sel_proto;
1509         ifmsh->mesh_pm_id = setup->path_metric;
1510         ifmsh->security = IEEE80211_MESH_SEC_NONE;
1511         if (setup->is_authenticated)
1512                 ifmsh->security |= IEEE80211_MESH_SEC_AUTHED;
1513         if (setup->is_secure)
1514                 ifmsh->security |= IEEE80211_MESH_SEC_SECURED;
1515
1516         /* mcast rate setting in Mesh Node */
1517         memcpy(sdata->vif.bss_conf.mcast_rate, setup->mcast_rate,
1518                                                 sizeof(setup->mcast_rate));
1519
1520         return 0;
1521 }
1522
1523 static int ieee80211_update_mesh_config(struct wiphy *wiphy,
1524                                         struct net_device *dev, u32 mask,
1525                                         const struct mesh_config *nconf)
1526 {
1527         struct mesh_config *conf;
1528         struct ieee80211_sub_if_data *sdata;
1529         struct ieee80211_if_mesh *ifmsh;
1530
1531         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1532         ifmsh = &sdata->u.mesh;
1533
1534         /* Set the config options which we are interested in setting */
1535         conf = &(sdata->u.mesh.mshcfg);
1536         if (_chg_mesh_attr(NL80211_MESHCONF_RETRY_TIMEOUT, mask))
1537                 conf->dot11MeshRetryTimeout = nconf->dot11MeshRetryTimeout;
1538         if (_chg_mesh_attr(NL80211_MESHCONF_CONFIRM_TIMEOUT, mask))
1539                 conf->dot11MeshConfirmTimeout = nconf->dot11MeshConfirmTimeout;
1540         if (_chg_mesh_attr(NL80211_MESHCONF_HOLDING_TIMEOUT, mask))
1541                 conf->dot11MeshHoldingTimeout = nconf->dot11MeshHoldingTimeout;
1542         if (_chg_mesh_attr(NL80211_MESHCONF_MAX_PEER_LINKS, mask))
1543                 conf->dot11MeshMaxPeerLinks = nconf->dot11MeshMaxPeerLinks;
1544         if (_chg_mesh_attr(NL80211_MESHCONF_MAX_RETRIES, mask))
1545                 conf->dot11MeshMaxRetries = nconf->dot11MeshMaxRetries;
1546         if (_chg_mesh_attr(NL80211_MESHCONF_TTL, mask))
1547                 conf->dot11MeshTTL = nconf->dot11MeshTTL;
1548         if (_chg_mesh_attr(NL80211_MESHCONF_ELEMENT_TTL, mask))
1549                 conf->element_ttl = nconf->element_ttl;
1550         if (_chg_mesh_attr(NL80211_MESHCONF_AUTO_OPEN_PLINKS, mask))
1551                 conf->auto_open_plinks = nconf->auto_open_plinks;
1552         if (_chg_mesh_attr(NL80211_MESHCONF_SYNC_OFFSET_MAX_NEIGHBOR, mask))
1553                 conf->dot11MeshNbrOffsetMaxNeighbor =
1554                         nconf->dot11MeshNbrOffsetMaxNeighbor;
1555         if (_chg_mesh_attr(NL80211_MESHCONF_HWMP_MAX_PREQ_RETRIES, mask))
1556                 conf->dot11MeshHWMPmaxPREQretries =
1557                         nconf->dot11MeshHWMPmaxPREQretries;
1558         if (_chg_mesh_attr(NL80211_MESHCONF_PATH_REFRESH_TIME, mask))
1559                 conf->path_refresh_time = nconf->path_refresh_time;
1560         if (_chg_mesh_attr(NL80211_MESHCONF_MIN_DISCOVERY_TIMEOUT, mask))
1561                 conf->min_discovery_timeout = nconf->min_discovery_timeout;
1562         if (_chg_mesh_attr(NL80211_MESHCONF_HWMP_ACTIVE_PATH_TIMEOUT, mask))
1563                 conf->dot11MeshHWMPactivePathTimeout =
1564                         nconf->dot11MeshHWMPactivePathTimeout;
1565         if (_chg_mesh_attr(NL80211_MESHCONF_HWMP_PREQ_MIN_INTERVAL, mask))
1566                 conf->dot11MeshHWMPpreqMinInterval =
1567                         nconf->dot11MeshHWMPpreqMinInterval;
1568         if (_chg_mesh_attr(NL80211_MESHCONF_HWMP_PERR_MIN_INTERVAL, mask))
1569                 conf->dot11MeshHWMPperrMinInterval =
1570                         nconf->dot11MeshHWMPperrMinInterval;
1571         if (_chg_mesh_attr(NL80211_MESHCONF_HWMP_NET_DIAM_TRVS_TIME,
1572                            mask))
1573                 conf->dot11MeshHWMPnetDiameterTraversalTime =
1574                         nconf->dot11MeshHWMPnetDiameterTraversalTime;
1575         if (_chg_mesh_attr(NL80211_MESHCONF_HWMP_ROOTMODE, mask)) {
1576                 conf->dot11MeshHWMPRootMode = nconf->dot11MeshHWMPRootMode;
1577                 ieee80211_mesh_root_setup(ifmsh);
1578         }
1579         if (_chg_mesh_attr(NL80211_MESHCONF_GATE_ANNOUNCEMENTS, mask)) {
1580                 /* our current gate announcement implementation rides on root
1581                  * announcements, so require this ifmsh to also be a root node
1582                  * */
1583                 if (nconf->dot11MeshGateAnnouncementProtocol &&
1584                     !(conf->dot11MeshHWMPRootMode > IEEE80211_ROOTMODE_ROOT)) {
1585                         conf->dot11MeshHWMPRootMode = IEEE80211_PROACTIVE_RANN;
1586                         ieee80211_mesh_root_setup(ifmsh);
1587                 }
1588                 conf->dot11MeshGateAnnouncementProtocol =
1589                         nconf->dot11MeshGateAnnouncementProtocol;
1590         }
1591         if (_chg_mesh_attr(NL80211_MESHCONF_HWMP_RANN_INTERVAL, mask))
1592                 conf->dot11MeshHWMPRannInterval =
1593                         nconf->dot11MeshHWMPRannInterval;
1594         if (_chg_mesh_attr(NL80211_MESHCONF_FORWARDING, mask))
1595                 conf->dot11MeshForwarding = nconf->dot11MeshForwarding;
1596         if (_chg_mesh_attr(NL80211_MESHCONF_RSSI_THRESHOLD, mask)) {
1597                 /* our RSSI threshold implementation is supported only for
1598                  * devices that report signal in dBm.
1599                  */
1600                 if (!(sdata->local->hw.flags & IEEE80211_HW_SIGNAL_DBM))
1601                         return -ENOTSUPP;
1602                 conf->rssi_threshold = nconf->rssi_threshold;
1603         }
1604         if (_chg_mesh_attr(NL80211_MESHCONF_HT_OPMODE, mask)) {
1605                 conf->ht_opmode = nconf->ht_opmode;
1606                 sdata->vif.bss_conf.ht_operation_mode = nconf->ht_opmode;
1607                 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_HT);
1608         }
1609         if (_chg_mesh_attr(NL80211_MESHCONF_HWMP_PATH_TO_ROOT_TIMEOUT, mask))
1610                 conf->dot11MeshHWMPactivePathToRootTimeout =
1611                         nconf->dot11MeshHWMPactivePathToRootTimeout;
1612         if (_chg_mesh_attr(NL80211_MESHCONF_HWMP_ROOT_INTERVAL, mask))
1613                 conf->dot11MeshHWMProotInterval =
1614                         nconf->dot11MeshHWMProotInterval;
1615         if (_chg_mesh_attr(NL80211_MESHCONF_HWMP_CONFIRMATION_INTERVAL, mask))
1616                 conf->dot11MeshHWMPconfirmationInterval =
1617                         nconf->dot11MeshHWMPconfirmationInterval;
1618         return 0;
1619 }
1620
1621 static int ieee80211_join_mesh(struct wiphy *wiphy, struct net_device *dev,
1622                                const struct mesh_config *conf,
1623                                const struct mesh_setup *setup)
1624 {
1625         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1626         struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
1627         int err;
1628
1629         memcpy(&ifmsh->mshcfg, conf, sizeof(struct mesh_config));
1630         err = copy_mesh_setup(ifmsh, setup);
1631         if (err)
1632                 return err;
1633
1634         err = ieee80211_set_channel(wiphy, dev, setup->channel,
1635                                     setup->channel_type);
1636         if (err)
1637                 return err;
1638
1639         ieee80211_start_mesh(sdata);
1640
1641         return 0;
1642 }
1643
1644 static int ieee80211_leave_mesh(struct wiphy *wiphy, struct net_device *dev)
1645 {
1646         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1647
1648         ieee80211_stop_mesh(sdata);
1649
1650         return 0;
1651 }
1652 #endif
1653
1654 static int ieee80211_change_bss(struct wiphy *wiphy,
1655                                 struct net_device *dev,
1656                                 struct bss_parameters *params)
1657 {
1658         struct ieee80211_sub_if_data *sdata;
1659         u32 changed = 0;
1660
1661         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1662
1663         if (params->use_cts_prot >= 0) {
1664                 sdata->vif.bss_conf.use_cts_prot = params->use_cts_prot;
1665                 changed |= BSS_CHANGED_ERP_CTS_PROT;
1666         }
1667         if (params->use_short_preamble >= 0) {
1668                 sdata->vif.bss_conf.use_short_preamble =
1669                         params->use_short_preamble;
1670                 changed |= BSS_CHANGED_ERP_PREAMBLE;
1671         }
1672
1673         if (!sdata->vif.bss_conf.use_short_slot &&
1674             sdata->local->oper_channel->band == IEEE80211_BAND_5GHZ) {
1675                 sdata->vif.bss_conf.use_short_slot = true;
1676                 changed |= BSS_CHANGED_ERP_SLOT;
1677         }
1678
1679         if (params->use_short_slot_time >= 0) {
1680                 sdata->vif.bss_conf.use_short_slot =
1681                         params->use_short_slot_time;
1682                 changed |= BSS_CHANGED_ERP_SLOT;
1683         }
1684
1685         if (params->basic_rates) {
1686                 int i, j;
1687                 u32 rates = 0;
1688                 struct ieee80211_local *local = wiphy_priv(wiphy);
1689                 struct ieee80211_supported_band *sband =
1690                         wiphy->bands[local->oper_channel->band];
1691
1692                 for (i = 0; i < params->basic_rates_len; i++) {
1693                         int rate = (params->basic_rates[i] & 0x7f) * 5;
1694                         for (j = 0; j < sband->n_bitrates; j++) {
1695                                 if (sband->bitrates[j].bitrate == rate)
1696                                         rates |= BIT(j);
1697                         }
1698                 }
1699                 sdata->vif.bss_conf.basic_rates = rates;
1700                 changed |= BSS_CHANGED_BASIC_RATES;
1701         }
1702
1703         if (params->ap_isolate >= 0) {
1704                 if (params->ap_isolate)
1705                         sdata->flags |= IEEE80211_SDATA_DONT_BRIDGE_PACKETS;
1706                 else
1707                         sdata->flags &= ~IEEE80211_SDATA_DONT_BRIDGE_PACKETS;
1708         }
1709
1710         if (params->ht_opmode >= 0) {
1711                 sdata->vif.bss_conf.ht_operation_mode =
1712                         (u16) params->ht_opmode;
1713                 changed |= BSS_CHANGED_HT;
1714         }
1715
1716         ieee80211_bss_info_change_notify(sdata, changed);
1717
1718         return 0;
1719 }
1720
1721 static int ieee80211_set_txq_params(struct wiphy *wiphy,
1722                                     struct net_device *dev,
1723                                     struct ieee80211_txq_params *params)
1724 {
1725         struct ieee80211_local *local = wiphy_priv(wiphy);
1726         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1727         struct ieee80211_tx_queue_params p;
1728
1729         if (!local->ops->conf_tx)
1730                 return -EOPNOTSUPP;
1731
1732         if (local->hw.queues < IEEE80211_NUM_ACS)
1733                 return -EOPNOTSUPP;
1734
1735         memset(&p, 0, sizeof(p));
1736         p.aifs = params->aifs;
1737         p.cw_max = params->cwmax;
1738         p.cw_min = params->cwmin;
1739         p.txop = params->txop;
1740
1741         /*
1742          * Setting tx queue params disables u-apsd because it's only
1743          * called in master mode.
1744          */
1745         p.uapsd = false;
1746
1747         sdata->tx_conf[params->ac] = p;
1748         if (drv_conf_tx(local, sdata, params->ac, &p)) {
1749                 wiphy_debug(local->hw.wiphy,
1750                             "failed to set TX queue parameters for AC %d\n",
1751                             params->ac);
1752                 return -EINVAL;
1753         }
1754
1755         ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_QOS);
1756
1757         return 0;
1758 }
1759
1760 #ifdef CONFIG_PM
1761 static int ieee80211_suspend(struct wiphy *wiphy,
1762                              struct cfg80211_wowlan *wowlan)
1763 {
1764         return __ieee80211_suspend(wiphy_priv(wiphy), wowlan);
1765 }
1766
1767 static int ieee80211_resume(struct wiphy *wiphy)
1768 {
1769         return __ieee80211_resume(wiphy_priv(wiphy));
1770 }
1771 #else
1772 #define ieee80211_suspend NULL
1773 #define ieee80211_resume NULL
1774 #endif
1775
1776 static int ieee80211_scan(struct wiphy *wiphy,
1777                           struct cfg80211_scan_request *req)
1778 {
1779         struct ieee80211_sub_if_data *sdata;
1780
1781         sdata = IEEE80211_WDEV_TO_SUB_IF(req->wdev);
1782
1783         switch (ieee80211_vif_type_p2p(&sdata->vif)) {
1784         case NL80211_IFTYPE_STATION:
1785         case NL80211_IFTYPE_ADHOC:
1786         case NL80211_IFTYPE_MESH_POINT:
1787         case NL80211_IFTYPE_P2P_CLIENT:
1788         case NL80211_IFTYPE_P2P_DEVICE:
1789                 break;
1790         case NL80211_IFTYPE_P2P_GO:
1791                 if (sdata->local->ops->hw_scan)
1792                         break;
1793                 /*
1794                  * FIXME: implement NoA while scanning in software,
1795                  * for now fall through to allow scanning only when
1796                  * beaconing hasn't been configured yet
1797                  */
1798         case NL80211_IFTYPE_AP:
1799                 if (sdata->u.ap.beacon)
1800                         return -EOPNOTSUPP;
1801                 break;
1802         default:
1803                 return -EOPNOTSUPP;
1804         }
1805
1806         return ieee80211_request_scan(sdata, req);
1807 }
1808
1809 static int
1810 ieee80211_sched_scan_start(struct wiphy *wiphy,
1811                            struct net_device *dev,
1812                            struct cfg80211_sched_scan_request *req)
1813 {
1814         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1815
1816         if (!sdata->local->ops->sched_scan_start)
1817                 return -EOPNOTSUPP;
1818
1819         return ieee80211_request_sched_scan_start(sdata, req);
1820 }
1821
1822 static int
1823 ieee80211_sched_scan_stop(struct wiphy *wiphy, struct net_device *dev)
1824 {
1825         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1826
1827         if (!sdata->local->ops->sched_scan_stop)
1828                 return -EOPNOTSUPP;
1829
1830         return ieee80211_request_sched_scan_stop(sdata);
1831 }
1832
1833 static int ieee80211_auth(struct wiphy *wiphy, struct net_device *dev,
1834                           struct cfg80211_auth_request *req)
1835 {
1836         return ieee80211_mgd_auth(IEEE80211_DEV_TO_SUB_IF(dev), req);
1837 }
1838
1839 static int ieee80211_assoc(struct wiphy *wiphy, struct net_device *dev,
1840                            struct cfg80211_assoc_request *req)
1841 {
1842         struct ieee80211_local *local = wiphy_priv(wiphy);
1843         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1844
1845         switch (ieee80211_get_channel_mode(local, sdata)) {
1846         case CHAN_MODE_HOPPING:
1847                 return -EBUSY;
1848         case CHAN_MODE_FIXED:
1849                 if (local->oper_channel == req->bss->channel)
1850                         break;
1851                 return -EBUSY;
1852         case CHAN_MODE_UNDEFINED:
1853                 break;
1854         }
1855
1856         return ieee80211_mgd_assoc(IEEE80211_DEV_TO_SUB_IF(dev), req);
1857 }
1858
1859 static int ieee80211_deauth(struct wiphy *wiphy, struct net_device *dev,
1860                             struct cfg80211_deauth_request *req)
1861 {
1862         return ieee80211_mgd_deauth(IEEE80211_DEV_TO_SUB_IF(dev), req);
1863 }
1864
1865 static int ieee80211_disassoc(struct wiphy *wiphy, struct net_device *dev,
1866                               struct cfg80211_disassoc_request *req)
1867 {
1868         return ieee80211_mgd_disassoc(IEEE80211_DEV_TO_SUB_IF(dev), req);
1869 }
1870
1871 static int ieee80211_join_ibss(struct wiphy *wiphy, struct net_device *dev,
1872                                struct cfg80211_ibss_params *params)
1873 {
1874         struct ieee80211_local *local = wiphy_priv(wiphy);
1875         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1876
1877         switch (ieee80211_get_channel_mode(local, sdata)) {
1878         case CHAN_MODE_HOPPING:
1879                 return -EBUSY;
1880         case CHAN_MODE_FIXED:
1881                 if (!params->channel_fixed)
1882                         return -EBUSY;
1883                 if (local->oper_channel == params->channel)
1884                         break;
1885                 return -EBUSY;
1886         case CHAN_MODE_UNDEFINED:
1887                 break;
1888         }
1889
1890         return ieee80211_ibss_join(sdata, params);
1891 }
1892
1893 static int ieee80211_leave_ibss(struct wiphy *wiphy, struct net_device *dev)
1894 {
1895         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1896
1897         return ieee80211_ibss_leave(sdata);
1898 }
1899
1900 static int ieee80211_set_wiphy_params(struct wiphy *wiphy, u32 changed)
1901 {
1902         struct ieee80211_local *local = wiphy_priv(wiphy);
1903         int err;
1904
1905         if (changed & WIPHY_PARAM_FRAG_THRESHOLD) {
1906                 err = drv_set_frag_threshold(local, wiphy->frag_threshold);
1907
1908                 if (err)
1909                         return err;
1910         }
1911
1912         if (changed & WIPHY_PARAM_COVERAGE_CLASS) {
1913                 err = drv_set_coverage_class(local, wiphy->coverage_class);
1914
1915                 if (err)
1916                         return err;
1917         }
1918
1919         if (changed & WIPHY_PARAM_RTS_THRESHOLD) {
1920                 err = drv_set_rts_threshold(local, wiphy->rts_threshold);
1921
1922                 if (err)
1923                         return err;
1924         }
1925
1926         if (changed & WIPHY_PARAM_RETRY_SHORT)
1927                 local->hw.conf.short_frame_max_tx_count = wiphy->retry_short;
1928         if (changed & WIPHY_PARAM_RETRY_LONG)
1929                 local->hw.conf.long_frame_max_tx_count = wiphy->retry_long;
1930         if (changed &
1931             (WIPHY_PARAM_RETRY_SHORT | WIPHY_PARAM_RETRY_LONG))
1932                 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_RETRY_LIMITS);
1933
1934         return 0;
1935 }
1936
1937 static int ieee80211_set_tx_power(struct wiphy *wiphy,
1938                                   enum nl80211_tx_power_setting type, int mbm)
1939 {
1940         struct ieee80211_local *local = wiphy_priv(wiphy);
1941         struct ieee80211_channel *chan = local->oper_channel;
1942         u32 changes = 0;
1943
1944         switch (type) {
1945         case NL80211_TX_POWER_AUTOMATIC:
1946                 local->user_power_level = -1;
1947                 break;
1948         case NL80211_TX_POWER_LIMITED:
1949                 if (mbm < 0 || (mbm % 100))
1950                         return -EOPNOTSUPP;
1951                 local->user_power_level = MBM_TO_DBM(mbm);
1952                 break;
1953         case NL80211_TX_POWER_FIXED:
1954                 if (mbm < 0 || (mbm % 100))
1955                         return -EOPNOTSUPP;
1956                 /* TODO: move to cfg80211 when it knows the channel */
1957                 if (MBM_TO_DBM(mbm) > chan->max_power)
1958                         return -EINVAL;
1959                 local->user_power_level = MBM_TO_DBM(mbm);
1960                 break;
1961         }
1962
1963         ieee80211_hw_config(local, changes);
1964
1965         return 0;
1966 }
1967
1968 static int ieee80211_get_tx_power(struct wiphy *wiphy, int *dbm)
1969 {
1970         struct ieee80211_local *local = wiphy_priv(wiphy);
1971
1972         *dbm = local->hw.conf.power_level;
1973
1974         return 0;
1975 }
1976
1977 static int ieee80211_set_wds_peer(struct wiphy *wiphy, struct net_device *dev,
1978                                   const u8 *addr)
1979 {
1980         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1981
1982         memcpy(&sdata->u.wds.remote_addr, addr, ETH_ALEN);
1983
1984         return 0;
1985 }
1986
1987 static void ieee80211_rfkill_poll(struct wiphy *wiphy)
1988 {
1989         struct ieee80211_local *local = wiphy_priv(wiphy);
1990
1991         drv_rfkill_poll(local);
1992 }
1993
1994 #ifdef CONFIG_NL80211_TESTMODE
1995 static int ieee80211_testmode_cmd(struct wiphy *wiphy, void *data, int len)
1996 {
1997         struct ieee80211_local *local = wiphy_priv(wiphy);
1998
1999         if (!local->ops->testmode_cmd)
2000                 return -EOPNOTSUPP;
2001
2002         return local->ops->testmode_cmd(&local->hw, data, len);
2003 }
2004
2005 static int ieee80211_testmode_dump(struct wiphy *wiphy,
2006                                    struct sk_buff *skb,
2007                                    struct netlink_callback *cb,
2008                                    void *data, int len)
2009 {
2010         struct ieee80211_local *local = wiphy_priv(wiphy);
2011
2012         if (!local->ops->testmode_dump)
2013                 return -EOPNOTSUPP;
2014
2015         return local->ops->testmode_dump(&local->hw, skb, cb, data, len);
2016 }
2017 #endif
2018
2019 int __ieee80211_request_smps(struct ieee80211_sub_if_data *sdata,
2020                              enum ieee80211_smps_mode smps_mode)
2021 {
2022         const u8 *ap;
2023         enum ieee80211_smps_mode old_req;
2024         int err;
2025
2026         lockdep_assert_held(&sdata->u.mgd.mtx);
2027
2028         old_req = sdata->u.mgd.req_smps;
2029         sdata->u.mgd.req_smps = smps_mode;
2030
2031         if (old_req == smps_mode &&
2032             smps_mode != IEEE80211_SMPS_AUTOMATIC)
2033                 return 0;
2034
2035         /*
2036          * If not associated, or current association is not an HT
2037          * association, there's no need to send an action frame.
2038          */
2039         if (!sdata->u.mgd.associated ||
2040             sdata->vif.bss_conf.channel_type == NL80211_CHAN_NO_HT) {
2041                 mutex_lock(&sdata->local->iflist_mtx);
2042                 ieee80211_recalc_smps(sdata->local);
2043                 mutex_unlock(&sdata->local->iflist_mtx);
2044                 return 0;
2045         }
2046
2047         ap = sdata->u.mgd.associated->bssid;
2048
2049         if (smps_mode == IEEE80211_SMPS_AUTOMATIC) {
2050                 if (sdata->u.mgd.powersave)
2051                         smps_mode = IEEE80211_SMPS_DYNAMIC;
2052                 else
2053                         smps_mode = IEEE80211_SMPS_OFF;
2054         }
2055
2056         /* send SM PS frame to AP */
2057         err = ieee80211_send_smps_action(sdata, smps_mode,
2058                                          ap, ap);
2059         if (err)
2060                 sdata->u.mgd.req_smps = old_req;
2061
2062         return err;
2063 }
2064
2065 static int ieee80211_set_power_mgmt(struct wiphy *wiphy, struct net_device *dev,
2066                                     bool enabled, int timeout)
2067 {
2068         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2069         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2070
2071         if (sdata->vif.type != NL80211_IFTYPE_STATION)
2072                 return -EOPNOTSUPP;
2073
2074         if (!(local->hw.flags & IEEE80211_HW_SUPPORTS_PS))
2075                 return -EOPNOTSUPP;
2076
2077         if (enabled == sdata->u.mgd.powersave &&
2078             timeout == local->dynamic_ps_forced_timeout)
2079                 return 0;
2080
2081         sdata->u.mgd.powersave = enabled;
2082         local->dynamic_ps_forced_timeout = timeout;
2083
2084         /* no change, but if automatic follow powersave */
2085         mutex_lock(&sdata->u.mgd.mtx);
2086         __ieee80211_request_smps(sdata, sdata->u.mgd.req_smps);
2087         mutex_unlock(&sdata->u.mgd.mtx);
2088
2089         if (local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_PS)
2090                 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
2091
2092         ieee80211_recalc_ps(local, -1);
2093         ieee80211_recalc_ps_vif(sdata);
2094
2095         return 0;
2096 }
2097
2098 static int ieee80211_set_cqm_rssi_config(struct wiphy *wiphy,
2099                                          struct net_device *dev,
2100                                          s32 rssi_thold, u32 rssi_hyst)
2101 {
2102         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2103         struct ieee80211_vif *vif = &sdata->vif;
2104         struct ieee80211_bss_conf *bss_conf = &vif->bss_conf;
2105
2106         if (rssi_thold == bss_conf->cqm_rssi_thold &&
2107             rssi_hyst == bss_conf->cqm_rssi_hyst)
2108                 return 0;
2109
2110         bss_conf->cqm_rssi_thold = rssi_thold;
2111         bss_conf->cqm_rssi_hyst = rssi_hyst;
2112
2113         /* tell the driver upon association, unless already associated */
2114         if (sdata->u.mgd.associated &&
2115             sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI)
2116                 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_CQM);
2117
2118         return 0;
2119 }
2120
2121 static int ieee80211_set_bitrate_mask(struct wiphy *wiphy,
2122                                       struct net_device *dev,
2123                                       const u8 *addr,
2124                                       const struct cfg80211_bitrate_mask *mask)
2125 {
2126         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2127         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2128         int i, ret;
2129
2130         if (!ieee80211_sdata_running(sdata))
2131                 return -ENETDOWN;
2132
2133         if (local->hw.flags & IEEE80211_HW_HAS_RATE_CONTROL) {
2134                 ret = drv_set_bitrate_mask(local, sdata, mask);
2135                 if (ret)
2136                         return ret;
2137         }
2138
2139         for (i = 0; i < IEEE80211_NUM_BANDS; i++) {
2140                 sdata->rc_rateidx_mask[i] = mask->control[i].legacy;
2141                 memcpy(sdata->rc_rateidx_mcs_mask[i], mask->control[i].mcs,
2142                        sizeof(mask->control[i].mcs));
2143         }
2144
2145         return 0;
2146 }
2147
2148 static int ieee80211_start_roc_work(struct ieee80211_local *local,
2149                                     struct ieee80211_sub_if_data *sdata,
2150                                     struct ieee80211_channel *channel,
2151                                     enum nl80211_channel_type channel_type,
2152                                     unsigned int duration, u64 *cookie,
2153                                     struct sk_buff *txskb)
2154 {
2155         struct ieee80211_roc_work *roc, *tmp;
2156         bool queued = false;
2157         int ret;
2158
2159         lockdep_assert_held(&local->mtx);
2160
2161         roc = kzalloc(sizeof(*roc), GFP_KERNEL);
2162         if (!roc)
2163                 return -ENOMEM;
2164
2165         roc->chan = channel;
2166         roc->chan_type = channel_type;
2167         roc->duration = duration;
2168         roc->req_duration = duration;
2169         roc->frame = txskb;
2170         roc->mgmt_tx_cookie = (unsigned long)txskb;
2171         roc->sdata = sdata;
2172         INIT_DELAYED_WORK(&roc->work, ieee80211_sw_roc_work);
2173         INIT_LIST_HEAD(&roc->dependents);
2174
2175         /* if there's one pending or we're scanning, queue this one */
2176         if (!list_empty(&local->roc_list) || local->scanning)
2177                 goto out_check_combine;
2178
2179         /* if not HW assist, just queue & schedule work */
2180         if (!local->ops->remain_on_channel) {
2181                 ieee80211_queue_delayed_work(&local->hw, &roc->work, 0);
2182                 goto out_queue;
2183         }
2184
2185         /* otherwise actually kick it off here (for error handling) */
2186
2187         /*
2188          * If the duration is zero, then the driver
2189          * wouldn't actually do anything. Set it to
2190          * 10 for now.
2191          *
2192          * TODO: cancel the off-channel operation
2193          *       when we get the SKB's TX status and
2194          *       the wait time was zero before.
2195          */
2196         if (!duration)
2197                 duration = 10;
2198
2199         ret = drv_remain_on_channel(local, channel, channel_type, duration);
2200         if (ret) {
2201                 kfree(roc);
2202                 return ret;
2203         }
2204
2205         roc->started = true;
2206         goto out_queue;
2207
2208  out_check_combine:
2209         list_for_each_entry(tmp, &local->roc_list, list) {
2210                 if (tmp->chan != channel || tmp->chan_type != channel_type)
2211                         continue;
2212
2213                 /*
2214                  * Extend this ROC if possible:
2215                  *
2216                  * If it hasn't started yet, just increase the duration
2217                  * and add the new one to the list of dependents.
2218                  */
2219                 if (!tmp->started) {
2220                         list_add_tail(&roc->list, &tmp->dependents);
2221                         tmp->duration = max(tmp->duration, roc->duration);
2222                         queued = true;
2223                         break;
2224                 }
2225
2226                 /* If it has already started, it's more difficult ... */
2227                 if (local->ops->remain_on_channel) {
2228                         unsigned long j = jiffies;
2229
2230                         /*
2231                          * In the offloaded ROC case, if it hasn't begun, add
2232                          * this new one to the dependent list to be handled
2233                          * when the the master one begins. If it has begun,
2234                          * check that there's still a minimum time left and
2235                          * if so, start this one, transmitting the frame, but
2236                          * add it to the list directly after this one with a
2237                          * a reduced time so we'll ask the driver to execute
2238                          * it right after finishing the previous one, in the
2239                          * hope that it'll also be executed right afterwards,
2240                          * effectively extending the old one.
2241                          * If there's no minimum time left, just add it to the
2242                          * normal list.
2243                          */
2244                         if (!tmp->hw_begun) {
2245                                 list_add_tail(&roc->list, &tmp->dependents);
2246                                 queued = true;
2247                                 break;
2248                         }
2249
2250                         if (time_before(j + IEEE80211_ROC_MIN_LEFT,
2251                                         tmp->hw_start_time +
2252                                         msecs_to_jiffies(tmp->duration))) {
2253                                 int new_dur;
2254
2255                                 ieee80211_handle_roc_started(roc);
2256
2257                                 new_dur = roc->duration -
2258                                           jiffies_to_msecs(tmp->hw_start_time +
2259                                                            msecs_to_jiffies(
2260                                                                 tmp->duration) -
2261                                                            j);
2262
2263                                 if (new_dur > 0) {
2264                                         /* add right after tmp */
2265                                         list_add(&roc->list, &tmp->list);
2266                                 } else {
2267                                         list_add_tail(&roc->list,
2268                                                       &tmp->dependents);
2269                                 }
2270                                 queued = true;
2271                         }
2272                 } else if (del_timer_sync(&tmp->work.timer)) {
2273                         unsigned long new_end;
2274
2275                         /*
2276                          * In the software ROC case, cancel the timer, if
2277                          * that fails then the finish work is already
2278                          * queued/pending and thus we queue the new ROC
2279                          * normally, if that succeeds then we can extend
2280                          * the timer duration and TX the frame (if any.)
2281                          */
2282
2283                         list_add_tail(&roc->list, &tmp->dependents);
2284                         queued = true;
2285
2286                         new_end = jiffies + msecs_to_jiffies(roc->duration);
2287
2288                         /* ok, it was started & we canceled timer */
2289                         if (time_after(new_end, tmp->work.timer.expires))
2290                                 mod_timer(&tmp->work.timer, new_end);
2291                         else
2292                                 add_timer(&tmp->work.timer);
2293
2294                         ieee80211_handle_roc_started(roc);
2295                 }
2296                 break;
2297         }
2298
2299  out_queue:
2300         if (!queued)
2301                 list_add_tail(&roc->list, &local->roc_list);
2302
2303         /*
2304          * cookie is either the roc (for normal roc)
2305          * or the SKB (for mgmt TX)
2306          */
2307         if (txskb)
2308                 *cookie = (unsigned long)txskb;
2309         else
2310                 *cookie = (unsigned long)roc;
2311
2312         return 0;
2313 }
2314
2315 static int ieee80211_remain_on_channel(struct wiphy *wiphy,
2316                                        struct wireless_dev *wdev,
2317                                        struct ieee80211_channel *chan,
2318                                        enum nl80211_channel_type channel_type,
2319                                        unsigned int duration,
2320                                        u64 *cookie)
2321 {
2322         struct ieee80211_sub_if_data *sdata = IEEE80211_WDEV_TO_SUB_IF(wdev);
2323         struct ieee80211_local *local = sdata->local;
2324         int ret;
2325
2326         mutex_lock(&local->mtx);
2327         ret = ieee80211_start_roc_work(local, sdata, chan, channel_type,
2328                                        duration, cookie, NULL);
2329         mutex_unlock(&local->mtx);
2330
2331         return ret;
2332 }
2333
2334 static int ieee80211_cancel_roc(struct ieee80211_local *local,
2335                                 u64 cookie, bool mgmt_tx)
2336 {
2337         struct ieee80211_roc_work *roc, *tmp, *found = NULL;
2338         int ret;
2339
2340         mutex_lock(&local->mtx);
2341         list_for_each_entry_safe(roc, tmp, &local->roc_list, list) {
2342                 struct ieee80211_roc_work *dep, *tmp2;
2343
2344                 list_for_each_entry_safe(dep, tmp2, &roc->dependents, list) {
2345                         if (!mgmt_tx && (unsigned long)dep != cookie)
2346                                 continue;
2347                         else if (mgmt_tx && dep->mgmt_tx_cookie != cookie)
2348                                 continue;
2349                         /* found dependent item -- just remove it */
2350                         list_del(&dep->list);
2351                         mutex_unlock(&local->mtx);
2352
2353                         ieee80211_roc_notify_destroy(dep);
2354                         return 0;
2355                 }
2356
2357                 if (!mgmt_tx && (unsigned long)roc != cookie)
2358                         continue;
2359                 else if (mgmt_tx && roc->mgmt_tx_cookie != cookie)
2360                         continue;
2361
2362                 found = roc;
2363                 break;
2364         }
2365
2366         if (!found) {
2367                 mutex_unlock(&local->mtx);
2368                 return -ENOENT;
2369         }
2370
2371         /*
2372          * We found the item to cancel, so do that. Note that it
2373          * may have dependents, which we also cancel (and send
2374          * the expired signal for.) Not doing so would be quite
2375          * tricky here, but we may need to fix it later.
2376          */
2377
2378         if (local->ops->remain_on_channel) {
2379                 if (found->started) {
2380                         ret = drv_cancel_remain_on_channel(local);
2381                         if (WARN_ON_ONCE(ret)) {
2382                                 mutex_unlock(&local->mtx);
2383                                 return ret;
2384                         }
2385                 }
2386
2387                 list_del(&found->list);
2388
2389                 if (found->started)
2390                         ieee80211_start_next_roc(local);
2391                 mutex_unlock(&local->mtx);
2392
2393                 ieee80211_roc_notify_destroy(found);
2394         } else {
2395                 /* work may be pending so use it all the time */
2396                 found->abort = true;
2397                 ieee80211_queue_delayed_work(&local->hw, &found->work, 0);
2398
2399                 mutex_unlock(&local->mtx);
2400
2401                 /* work will clean up etc */
2402                 flush_delayed_work(&found->work);
2403         }
2404
2405         return 0;
2406 }
2407
2408 static int ieee80211_cancel_remain_on_channel(struct wiphy *wiphy,
2409                                               struct wireless_dev *wdev,
2410                                               u64 cookie)
2411 {
2412         struct ieee80211_sub_if_data *sdata = IEEE80211_WDEV_TO_SUB_IF(wdev);
2413         struct ieee80211_local *local = sdata->local;
2414
2415         return ieee80211_cancel_roc(local, cookie, false);
2416 }
2417
2418 static int ieee80211_mgmt_tx(struct wiphy *wiphy, struct wireless_dev *wdev,
2419                              struct ieee80211_channel *chan, bool offchan,
2420                              enum nl80211_channel_type channel_type,
2421                              bool channel_type_valid, unsigned int wait,
2422                              const u8 *buf, size_t len, bool no_cck,
2423                              bool dont_wait_for_ack, u64 *cookie)
2424 {
2425         struct ieee80211_sub_if_data *sdata = IEEE80211_WDEV_TO_SUB_IF(wdev);
2426         struct ieee80211_local *local = sdata->local;
2427         struct sk_buff *skb;
2428         struct sta_info *sta;
2429         const struct ieee80211_mgmt *mgmt = (void *)buf;
2430         bool need_offchan = false;
2431         u32 flags;
2432         int ret;
2433
2434         if (dont_wait_for_ack)
2435                 flags = IEEE80211_TX_CTL_NO_ACK;
2436         else
2437                 flags = IEEE80211_TX_INTFL_NL80211_FRAME_TX |
2438                         IEEE80211_TX_CTL_REQ_TX_STATUS;
2439
2440         if (no_cck)
2441                 flags |= IEEE80211_TX_CTL_NO_CCK_RATE;
2442
2443         switch (sdata->vif.type) {
2444         case NL80211_IFTYPE_ADHOC:
2445                 if (!sdata->vif.bss_conf.ibss_joined)
2446                         need_offchan = true;
2447                 /* fall through */
2448 #ifdef CONFIG_MAC80211_MESH
2449         case NL80211_IFTYPE_MESH_POINT:
2450                 if (ieee80211_vif_is_mesh(&sdata->vif) &&
2451                     !sdata->u.mesh.mesh_id_len)
2452                         need_offchan = true;
2453                 /* fall through */
2454 #endif
2455         case NL80211_IFTYPE_AP:
2456         case NL80211_IFTYPE_AP_VLAN:
2457         case NL80211_IFTYPE_P2P_GO:
2458                 if (sdata->vif.type != NL80211_IFTYPE_ADHOC &&
2459                     !ieee80211_vif_is_mesh(&sdata->vif) &&
2460                     !rcu_access_pointer(sdata->bss->beacon))
2461                         need_offchan = true;
2462                 if (!ieee80211_is_action(mgmt->frame_control) ||
2463                     mgmt->u.action.category == WLAN_CATEGORY_PUBLIC)
2464                         break;
2465                 rcu_read_lock();
2466                 sta = sta_info_get(sdata, mgmt->da);
2467                 rcu_read_unlock();
2468                 if (!sta)
2469                         return -ENOLINK;
2470                 break;
2471         case NL80211_IFTYPE_STATION:
2472         case NL80211_IFTYPE_P2P_CLIENT:
2473                 if (!sdata->u.mgd.associated)
2474                         need_offchan = true;
2475                 break;
2476         case NL80211_IFTYPE_P2P_DEVICE:
2477                 need_offchan = true;
2478                 break;
2479         default:
2480                 return -EOPNOTSUPP;
2481         }
2482
2483         mutex_lock(&local->mtx);
2484
2485         /* Check if the operating channel is the requested channel */
2486         if (!need_offchan) {
2487                 need_offchan = chan != local->oper_channel;
2488                 if (channel_type_valid &&
2489                     channel_type != local->_oper_channel_type)
2490                         need_offchan = true;
2491         }
2492
2493         if (need_offchan && !offchan) {
2494                 ret = -EBUSY;
2495                 goto out_unlock;
2496         }
2497
2498         skb = dev_alloc_skb(local->hw.extra_tx_headroom + len);
2499         if (!skb) {
2500                 ret = -ENOMEM;
2501                 goto out_unlock;
2502         }
2503         skb_reserve(skb, local->hw.extra_tx_headroom);
2504
2505         memcpy(skb_put(skb, len), buf, len);
2506
2507         IEEE80211_SKB_CB(skb)->flags = flags;
2508
2509         skb->dev = sdata->dev;
2510
2511         if (!need_offchan) {
2512                 *cookie = (unsigned long) skb;
2513                 ieee80211_tx_skb(sdata, skb);
2514                 ret = 0;
2515                 goto out_unlock;
2516         }
2517
2518         IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_TX_OFFCHAN;
2519         if (local->hw.flags & IEEE80211_HW_QUEUE_CONTROL)
2520                 IEEE80211_SKB_CB(skb)->hw_queue =
2521                         local->hw.offchannel_tx_hw_queue;
2522
2523         /* This will handle all kinds of coalescing and immediate TX */
2524         ret = ieee80211_start_roc_work(local, sdata, chan, channel_type,
2525                                        wait, cookie, skb);
2526         if (ret)
2527                 kfree_skb(skb);
2528  out_unlock:
2529         mutex_unlock(&local->mtx);
2530         return ret;
2531 }
2532
2533 static int ieee80211_mgmt_tx_cancel_wait(struct wiphy *wiphy,
2534                                          struct wireless_dev *wdev,
2535                                          u64 cookie)
2536 {
2537         struct ieee80211_local *local = wiphy_priv(wiphy);
2538
2539         return ieee80211_cancel_roc(local, cookie, true);
2540 }
2541
2542 static void ieee80211_mgmt_frame_register(struct wiphy *wiphy,
2543                                           struct wireless_dev *wdev,
2544                                           u16 frame_type, bool reg)
2545 {
2546         struct ieee80211_local *local = wiphy_priv(wiphy);
2547         struct ieee80211_sub_if_data *sdata = IEEE80211_WDEV_TO_SUB_IF(wdev);
2548
2549         switch (frame_type) {
2550         case IEEE80211_FTYPE_MGMT | IEEE80211_STYPE_AUTH:
2551                 if (sdata->vif.type == NL80211_IFTYPE_ADHOC) {
2552                         struct ieee80211_if_ibss *ifibss = &sdata->u.ibss;
2553
2554                         if (reg)
2555                                 ifibss->auth_frame_registrations++;
2556                         else
2557                                 ifibss->auth_frame_registrations--;
2558                 }
2559                 break;
2560         case IEEE80211_FTYPE_MGMT | IEEE80211_STYPE_PROBE_REQ:
2561                 if (reg)
2562                         local->probe_req_reg++;
2563                 else
2564                         local->probe_req_reg--;
2565
2566                 ieee80211_queue_work(&local->hw, &local->reconfig_filter);
2567                 break;
2568         default:
2569                 break;
2570         }
2571 }
2572
2573 static int ieee80211_set_antenna(struct wiphy *wiphy, u32 tx_ant, u32 rx_ant)
2574 {
2575         struct ieee80211_local *local = wiphy_priv(wiphy);
2576
2577         if (local->started)
2578                 return -EOPNOTSUPP;
2579
2580         return drv_set_antenna(local, tx_ant, rx_ant);
2581 }
2582
2583 static int ieee80211_get_antenna(struct wiphy *wiphy, u32 *tx_ant, u32 *rx_ant)
2584 {
2585         struct ieee80211_local *local = wiphy_priv(wiphy);
2586
2587         return drv_get_antenna(local, tx_ant, rx_ant);
2588 }
2589
2590 static int ieee80211_set_ringparam(struct wiphy *wiphy, u32 tx, u32 rx)
2591 {
2592         struct ieee80211_local *local = wiphy_priv(wiphy);
2593
2594         return drv_set_ringparam(local, tx, rx);
2595 }
2596
2597 static void ieee80211_get_ringparam(struct wiphy *wiphy,
2598                                     u32 *tx, u32 *tx_max, u32 *rx, u32 *rx_max)
2599 {
2600         struct ieee80211_local *local = wiphy_priv(wiphy);
2601
2602         drv_get_ringparam(local, tx, tx_max, rx, rx_max);
2603 }
2604
2605 static int ieee80211_set_rekey_data(struct wiphy *wiphy,
2606                                     struct net_device *dev,
2607                                     struct cfg80211_gtk_rekey_data *data)
2608 {
2609         struct ieee80211_local *local = wiphy_priv(wiphy);
2610         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2611
2612         if (!local->ops->set_rekey_data)
2613                 return -EOPNOTSUPP;
2614
2615         drv_set_rekey_data(local, sdata, data);
2616
2617         return 0;
2618 }
2619
2620 static void ieee80211_tdls_add_ext_capab(struct sk_buff *skb)
2621 {
2622         u8 *pos = (void *)skb_put(skb, 7);
2623
2624         *pos++ = WLAN_EID_EXT_CAPABILITY;
2625         *pos++ = 5; /* len */
2626         *pos++ = 0x0;
2627         *pos++ = 0x0;
2628         *pos++ = 0x0;
2629         *pos++ = 0x0;
2630         *pos++ = WLAN_EXT_CAPA5_TDLS_ENABLED;
2631 }
2632
2633 static u16 ieee80211_get_tdls_sta_capab(struct ieee80211_sub_if_data *sdata)
2634 {
2635         struct ieee80211_local *local = sdata->local;
2636         u16 capab;
2637
2638         capab = 0;
2639         if (local->oper_channel->band != IEEE80211_BAND_2GHZ)
2640                 return capab;
2641
2642         if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_SLOT_INCAPABLE))
2643                 capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME;
2644         if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_PREAMBLE_INCAPABLE))
2645                 capab |= WLAN_CAPABILITY_SHORT_PREAMBLE;
2646
2647         return capab;
2648 }
2649
2650 static void ieee80211_tdls_add_link_ie(struct sk_buff *skb, u8 *src_addr,
2651                                        u8 *peer, u8 *bssid)
2652 {
2653         struct ieee80211_tdls_lnkie *lnkid;
2654
2655         lnkid = (void *)skb_put(skb, sizeof(struct ieee80211_tdls_lnkie));
2656
2657         lnkid->ie_type = WLAN_EID_LINK_ID;
2658         lnkid->ie_len = sizeof(struct ieee80211_tdls_lnkie) - 2;
2659
2660         memcpy(lnkid->bssid, bssid, ETH_ALEN);
2661         memcpy(lnkid->init_sta, src_addr, ETH_ALEN);
2662         memcpy(lnkid->resp_sta, peer, ETH_ALEN);
2663 }
2664
2665 static int
2666 ieee80211_prep_tdls_encap_data(struct wiphy *wiphy, struct net_device *dev,
2667                                u8 *peer, u8 action_code, u8 dialog_token,
2668                                u16 status_code, struct sk_buff *skb)
2669 {
2670         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2671         struct ieee80211_local *local = sdata->local;
2672         struct ieee80211_tdls_data *tf;
2673
2674         tf = (void *)skb_put(skb, offsetof(struct ieee80211_tdls_data, u));
2675
2676         memcpy(tf->da, peer, ETH_ALEN);
2677         memcpy(tf->sa, sdata->vif.addr, ETH_ALEN);
2678         tf->ether_type = cpu_to_be16(ETH_P_TDLS);
2679         tf->payload_type = WLAN_TDLS_SNAP_RFTYPE;
2680
2681         switch (action_code) {
2682         case WLAN_TDLS_SETUP_REQUEST:
2683                 tf->category = WLAN_CATEGORY_TDLS;
2684                 tf->action_code = WLAN_TDLS_SETUP_REQUEST;
2685
2686                 skb_put(skb, sizeof(tf->u.setup_req));
2687                 tf->u.setup_req.dialog_token = dialog_token;
2688                 tf->u.setup_req.capability =
2689                         cpu_to_le16(ieee80211_get_tdls_sta_capab(sdata));
2690
2691                 ieee80211_add_srates_ie(sdata, skb, false,
2692                                         local->oper_channel->band);
2693                 ieee80211_add_ext_srates_ie(sdata, skb, false,
2694                                             local->oper_channel->band);
2695                 ieee80211_tdls_add_ext_capab(skb);
2696                 break;
2697         case WLAN_TDLS_SETUP_RESPONSE:
2698                 tf->category = WLAN_CATEGORY_TDLS;
2699                 tf->action_code = WLAN_TDLS_SETUP_RESPONSE;
2700
2701                 skb_put(skb, sizeof(tf->u.setup_resp));
2702                 tf->u.setup_resp.status_code = cpu_to_le16(status_code);
2703                 tf->u.setup_resp.dialog_token = dialog_token;
2704                 tf->u.setup_resp.capability =
2705                         cpu_to_le16(ieee80211_get_tdls_sta_capab(sdata));
2706
2707                 ieee80211_add_srates_ie(sdata, skb, false,
2708                                         local->oper_channel->band);
2709                 ieee80211_add_ext_srates_ie(sdata, skb, false,
2710                                             local->oper_channel->band);
2711                 ieee80211_tdls_add_ext_capab(skb);
2712                 break;
2713         case WLAN_TDLS_SETUP_CONFIRM:
2714                 tf->category = WLAN_CATEGORY_TDLS;
2715                 tf->action_code = WLAN_TDLS_SETUP_CONFIRM;
2716
2717                 skb_put(skb, sizeof(tf->u.setup_cfm));
2718                 tf->u.setup_cfm.status_code = cpu_to_le16(status_code);
2719                 tf->u.setup_cfm.dialog_token = dialog_token;
2720                 break;
2721         case WLAN_TDLS_TEARDOWN:
2722                 tf->category = WLAN_CATEGORY_TDLS;
2723                 tf->action_code = WLAN_TDLS_TEARDOWN;
2724
2725                 skb_put(skb, sizeof(tf->u.teardown));
2726                 tf->u.teardown.reason_code = cpu_to_le16(status_code);
2727                 break;
2728         case WLAN_TDLS_DISCOVERY_REQUEST:
2729                 tf->category = WLAN_CATEGORY_TDLS;
2730                 tf->action_code = WLAN_TDLS_DISCOVERY_REQUEST;
2731
2732                 skb_put(skb, sizeof(tf->u.discover_req));
2733                 tf->u.discover_req.dialog_token = dialog_token;
2734                 break;
2735         default:
2736                 return -EINVAL;
2737         }
2738
2739         return 0;
2740 }
2741
2742 static int
2743 ieee80211_prep_tdls_direct(struct wiphy *wiphy, struct net_device *dev,
2744                            u8 *peer, u8 action_code, u8 dialog_token,
2745                            u16 status_code, struct sk_buff *skb)
2746 {
2747         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2748         struct ieee80211_local *local = sdata->local;
2749         struct ieee80211_mgmt *mgmt;
2750
2751         mgmt = (void *)skb_put(skb, 24);
2752         memset(mgmt, 0, 24);
2753         memcpy(mgmt->da, peer, ETH_ALEN);
2754         memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
2755         memcpy(mgmt->bssid, sdata->u.mgd.bssid, ETH_ALEN);
2756
2757         mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
2758                                           IEEE80211_STYPE_ACTION);
2759
2760         switch (action_code) {
2761         case WLAN_PUB_ACTION_TDLS_DISCOVER_RES:
2762                 skb_put(skb, 1 + sizeof(mgmt->u.action.u.tdls_discover_resp));
2763                 mgmt->u.action.category = WLAN_CATEGORY_PUBLIC;
2764                 mgmt->u.action.u.tdls_discover_resp.action_code =
2765                         WLAN_PUB_ACTION_TDLS_DISCOVER_RES;
2766                 mgmt->u.action.u.tdls_discover_resp.dialog_token =
2767                         dialog_token;
2768                 mgmt->u.action.u.tdls_discover_resp.capability =
2769                         cpu_to_le16(ieee80211_get_tdls_sta_capab(sdata));
2770
2771                 ieee80211_add_srates_ie(sdata, skb, false,
2772                                         local->oper_channel->band);
2773                 ieee80211_add_ext_srates_ie(sdata, skb, false,
2774                                             local->oper_channel->band);
2775                 ieee80211_tdls_add_ext_capab(skb);
2776                 break;
2777         default:
2778                 return -EINVAL;
2779         }
2780
2781         return 0;
2782 }
2783
2784 static int ieee80211_tdls_mgmt(struct wiphy *wiphy, struct net_device *dev,
2785                                u8 *peer, u8 action_code, u8 dialog_token,
2786                                u16 status_code, const u8 *extra_ies,
2787                                size_t extra_ies_len)
2788 {
2789         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2790         struct ieee80211_local *local = sdata->local;
2791         struct ieee80211_tx_info *info;
2792         struct sk_buff *skb = NULL;
2793         bool send_direct;
2794         int ret;
2795
2796         if (!(wiphy->flags & WIPHY_FLAG_SUPPORTS_TDLS))
2797                 return -ENOTSUPP;
2798
2799         /* make sure we are in managed mode, and associated */
2800         if (sdata->vif.type != NL80211_IFTYPE_STATION ||
2801             !sdata->u.mgd.associated)
2802                 return -EINVAL;
2803
2804         tdls_dbg(sdata, "TDLS mgmt action %d peer %pM\n",
2805                  action_code, peer);
2806
2807         skb = dev_alloc_skb(local->hw.extra_tx_headroom +
2808                             max(sizeof(struct ieee80211_mgmt),
2809                                 sizeof(struct ieee80211_tdls_data)) +
2810                             50 + /* supported rates */
2811                             7 + /* ext capab */
2812                             extra_ies_len +
2813                             sizeof(struct ieee80211_tdls_lnkie));
2814         if (!skb)
2815                 return -ENOMEM;
2816
2817         info = IEEE80211_SKB_CB(skb);
2818         skb_reserve(skb, local->hw.extra_tx_headroom);
2819
2820         switch (action_code) {
2821         case WLAN_TDLS_SETUP_REQUEST:
2822         case WLAN_TDLS_SETUP_RESPONSE:
2823         case WLAN_TDLS_SETUP_CONFIRM:
2824         case WLAN_TDLS_TEARDOWN:
2825         case WLAN_TDLS_DISCOVERY_REQUEST:
2826                 ret = ieee80211_prep_tdls_encap_data(wiphy, dev, peer,
2827                                                      action_code, dialog_token,
2828                                                      status_code, skb);
2829                 send_direct = false;
2830                 break;
2831         case WLAN_PUB_ACTION_TDLS_DISCOVER_RES:
2832                 ret = ieee80211_prep_tdls_direct(wiphy, dev, peer, action_code,
2833                                                  dialog_token, status_code,
2834                                                  skb);
2835                 send_direct = true;
2836                 break;
2837         default:
2838                 ret = -ENOTSUPP;
2839                 break;
2840         }
2841
2842         if (ret < 0)
2843                 goto fail;
2844
2845         if (extra_ies_len)
2846                 memcpy(skb_put(skb, extra_ies_len), extra_ies, extra_ies_len);
2847
2848         /* the TDLS link IE is always added last */
2849         switch (action_code) {
2850         case WLAN_TDLS_SETUP_REQUEST:
2851         case WLAN_TDLS_SETUP_CONFIRM:
2852         case WLAN_TDLS_TEARDOWN:
2853         case WLAN_TDLS_DISCOVERY_REQUEST:
2854                 /* we are the initiator */
2855                 ieee80211_tdls_add_link_ie(skb, sdata->vif.addr, peer,
2856                                            sdata->u.mgd.bssid);
2857                 break;
2858         case WLAN_TDLS_SETUP_RESPONSE:
2859         case WLAN_PUB_ACTION_TDLS_DISCOVER_RES:
2860                 /* we are the responder */
2861                 ieee80211_tdls_add_link_ie(skb, peer, sdata->vif.addr,
2862                                            sdata->u.mgd.bssid);
2863                 break;
2864         default:
2865                 ret = -ENOTSUPP;
2866                 goto fail;
2867         }
2868
2869         if (send_direct) {
2870                 ieee80211_tx_skb(sdata, skb);
2871                 return 0;
2872         }
2873
2874         /*
2875          * According to 802.11z: Setup req/resp are sent in AC_BK, otherwise
2876          * we should default to AC_VI.
2877          */
2878         switch (action_code) {
2879         case WLAN_TDLS_SETUP_REQUEST:
2880         case WLAN_TDLS_SETUP_RESPONSE:
2881                 skb_set_queue_mapping(skb, IEEE80211_AC_BK);
2882                 skb->priority = 2;
2883                 break;
2884         default:
2885                 skb_set_queue_mapping(skb, IEEE80211_AC_VI);
2886                 skb->priority = 5;
2887                 break;
2888         }
2889
2890         /* disable bottom halves when entering the Tx path */
2891         local_bh_disable();
2892         ret = ieee80211_subif_start_xmit(skb, dev);
2893         local_bh_enable();
2894
2895         return ret;
2896
2897 fail:
2898         dev_kfree_skb(skb);
2899         return ret;
2900 }
2901
2902 static int ieee80211_tdls_oper(struct wiphy *wiphy, struct net_device *dev,
2903                                u8 *peer, enum nl80211_tdls_operation oper)
2904 {
2905         struct sta_info *sta;
2906         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2907
2908         if (!(wiphy->flags & WIPHY_FLAG_SUPPORTS_TDLS))
2909                 return -ENOTSUPP;
2910
2911         if (sdata->vif.type != NL80211_IFTYPE_STATION)
2912                 return -EINVAL;
2913
2914         tdls_dbg(sdata, "TDLS oper %d peer %pM\n", oper, peer);
2915
2916         switch (oper) {
2917         case NL80211_TDLS_ENABLE_LINK:
2918                 rcu_read_lock();
2919                 sta = sta_info_get(sdata, peer);
2920                 if (!sta) {
2921                         rcu_read_unlock();
2922                         return -ENOLINK;
2923                 }
2924
2925                 set_sta_flag(sta, WLAN_STA_TDLS_PEER_AUTH);
2926                 rcu_read_unlock();
2927                 break;
2928         case NL80211_TDLS_DISABLE_LINK:
2929                 return sta_info_destroy_addr(sdata, peer);
2930         case NL80211_TDLS_TEARDOWN:
2931         case NL80211_TDLS_SETUP:
2932         case NL80211_TDLS_DISCOVERY_REQ:
2933                 /* We don't support in-driver setup/teardown/discovery */
2934                 return -ENOTSUPP;
2935         default:
2936                 return -ENOTSUPP;
2937         }
2938
2939         return 0;
2940 }
2941
2942 static int ieee80211_probe_client(struct wiphy *wiphy, struct net_device *dev,
2943                                   const u8 *peer, u64 *cookie)
2944 {
2945         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2946         struct ieee80211_local *local = sdata->local;
2947         struct ieee80211_qos_hdr *nullfunc;
2948         struct sk_buff *skb;
2949         int size = sizeof(*nullfunc);
2950         __le16 fc;
2951         bool qos;
2952         struct ieee80211_tx_info *info;
2953         struct sta_info *sta;
2954
2955         rcu_read_lock();
2956         sta = sta_info_get(sdata, peer);
2957         if (sta) {
2958                 qos = test_sta_flag(sta, WLAN_STA_WME);
2959                 rcu_read_unlock();
2960         } else {
2961                 rcu_read_unlock();
2962                 return -ENOLINK;
2963         }
2964
2965         if (qos) {
2966                 fc = cpu_to_le16(IEEE80211_FTYPE_DATA |
2967                                  IEEE80211_STYPE_QOS_NULLFUNC |
2968                                  IEEE80211_FCTL_FROMDS);
2969         } else {
2970                 size -= 2;
2971                 fc = cpu_to_le16(IEEE80211_FTYPE_DATA |
2972                                  IEEE80211_STYPE_NULLFUNC |
2973                                  IEEE80211_FCTL_FROMDS);
2974         }
2975
2976         skb = dev_alloc_skb(local->hw.extra_tx_headroom + size);
2977         if (!skb)
2978                 return -ENOMEM;
2979
2980         skb->dev = dev;
2981
2982         skb_reserve(skb, local->hw.extra_tx_headroom);
2983
2984         nullfunc = (void *) skb_put(skb, size);
2985         nullfunc->frame_control = fc;
2986         nullfunc->duration_id = 0;
2987         memcpy(nullfunc->addr1, sta->sta.addr, ETH_ALEN);
2988         memcpy(nullfunc->addr2, sdata->vif.addr, ETH_ALEN);
2989         memcpy(nullfunc->addr3, sdata->vif.addr, ETH_ALEN);
2990         nullfunc->seq_ctrl = 0;
2991
2992         info = IEEE80211_SKB_CB(skb);
2993
2994         info->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS |
2995                        IEEE80211_TX_INTFL_NL80211_FRAME_TX;
2996
2997         skb_set_queue_mapping(skb, IEEE80211_AC_VO);
2998         skb->priority = 7;
2999         if (qos)
3000                 nullfunc->qos_ctrl = cpu_to_le16(7);
3001
3002         local_bh_disable();
3003         ieee80211_xmit(sdata, skb);
3004         local_bh_enable();
3005
3006         *cookie = (unsigned long) skb;
3007         return 0;
3008 }
3009
3010 static struct ieee80211_channel *
3011 ieee80211_cfg_get_channel(struct wiphy *wiphy, struct wireless_dev *wdev,
3012                           enum nl80211_channel_type *type)
3013 {
3014         struct ieee80211_local *local = wiphy_priv(wiphy);
3015
3016         *type = local->_oper_channel_type;
3017         return local->oper_channel;
3018 }
3019
3020 #ifdef CONFIG_PM
3021 static void ieee80211_set_wakeup(struct wiphy *wiphy, bool enabled)
3022 {
3023         drv_set_wakeup(wiphy_priv(wiphy), enabled);
3024 }
3025 #endif
3026
3027 struct cfg80211_ops mac80211_config_ops = {
3028         .add_virtual_intf = ieee80211_add_iface,
3029         .del_virtual_intf = ieee80211_del_iface,
3030         .change_virtual_intf = ieee80211_change_iface,
3031         .start_p2p_device = ieee80211_start_p2p_device,
3032         .stop_p2p_device = ieee80211_stop_p2p_device,
3033         .add_key = ieee80211_add_key,
3034         .del_key = ieee80211_del_key,
3035         .get_key = ieee80211_get_key,
3036         .set_default_key = ieee80211_config_default_key,
3037         .set_default_mgmt_key = ieee80211_config_default_mgmt_key,
3038         .start_ap = ieee80211_start_ap,
3039         .change_beacon = ieee80211_change_beacon,
3040         .stop_ap = ieee80211_stop_ap,
3041         .add_station = ieee80211_add_station,
3042         .del_station = ieee80211_del_station,
3043         .change_station = ieee80211_change_station,
3044         .get_station = ieee80211_get_station,
3045         .dump_station = ieee80211_dump_station,
3046         .dump_survey = ieee80211_dump_survey,
3047 #ifdef CONFIG_MAC80211_MESH
3048         .add_mpath = ieee80211_add_mpath,
3049         .del_mpath = ieee80211_del_mpath,
3050         .change_mpath = ieee80211_change_mpath,
3051         .get_mpath = ieee80211_get_mpath,
3052         .dump_mpath = ieee80211_dump_mpath,
3053         .update_mesh_config = ieee80211_update_mesh_config,
3054         .get_mesh_config = ieee80211_get_mesh_config,
3055         .join_mesh = ieee80211_join_mesh,
3056         .leave_mesh = ieee80211_leave_mesh,
3057 #endif
3058         .change_bss = ieee80211_change_bss,
3059         .set_txq_params = ieee80211_set_txq_params,
3060         .set_monitor_channel = ieee80211_set_monitor_channel,
3061         .suspend = ieee80211_suspend,
3062         .resume = ieee80211_resume,
3063         .scan = ieee80211_scan,
3064         .sched_scan_start = ieee80211_sched_scan_start,
3065         .sched_scan_stop = ieee80211_sched_scan_stop,
3066         .auth = ieee80211_auth,
3067         .assoc = ieee80211_assoc,
3068         .deauth = ieee80211_deauth,
3069         .disassoc = ieee80211_disassoc,
3070         .join_ibss = ieee80211_join_ibss,
3071         .leave_ibss = ieee80211_leave_ibss,
3072         .set_wiphy_params = ieee80211_set_wiphy_params,
3073         .set_tx_power = ieee80211_set_tx_power,
3074         .get_tx_power = ieee80211_get_tx_power,
3075         .set_wds_peer = ieee80211_set_wds_peer,
3076         .rfkill_poll = ieee80211_rfkill_poll,
3077         CFG80211_TESTMODE_CMD(ieee80211_testmode_cmd)
3078         CFG80211_TESTMODE_DUMP(ieee80211_testmode_dump)
3079         .set_power_mgmt = ieee80211_set_power_mgmt,
3080         .set_bitrate_mask = ieee80211_set_bitrate_mask,
3081         .remain_on_channel = ieee80211_remain_on_channel,
3082         .cancel_remain_on_channel = ieee80211_cancel_remain_on_channel,
3083         .mgmt_tx = ieee80211_mgmt_tx,
3084         .mgmt_tx_cancel_wait = ieee80211_mgmt_tx_cancel_wait,
3085         .set_cqm_rssi_config = ieee80211_set_cqm_rssi_config,
3086         .mgmt_frame_register = ieee80211_mgmt_frame_register,
3087         .set_antenna = ieee80211_set_antenna,
3088         .get_antenna = ieee80211_get_antenna,
3089         .set_ringparam = ieee80211_set_ringparam,
3090         .get_ringparam = ieee80211_get_ringparam,
3091         .set_rekey_data = ieee80211_set_rekey_data,
3092         .tdls_oper = ieee80211_tdls_oper,
3093         .tdls_mgmt = ieee80211_tdls_mgmt,
3094         .probe_client = ieee80211_probe_client,
3095         .set_noack_map = ieee80211_set_noack_map,
3096 #ifdef CONFIG_PM
3097         .set_wakeup = ieee80211_set_wakeup,
3098 #endif
3099         .get_et_sset_count = ieee80211_get_et_sset_count,
3100         .get_et_stats = ieee80211_get_et_stats,
3101         .get_et_strings = ieee80211_get_et_strings,
3102         .get_channel = ieee80211_cfg_get_channel,
3103 };