net/mac80211/cfg.c

   1 /*
   2  * mac80211 configuration hooks for cfg80211
   3  *
   4  * Copyright 2006-2010  Johannes Berg <johannes@sipsolutions.net>
   5  * Copyright 2013-2015  Intel Mobile Communications GmbH
   6  *
   7  * This file is GPLv2 as found in COPYING.
   8  */
   9
  10 #include <linux/ieee80211.h>
  11 #include <linux/nl80211.h>
  12 #include <linux/rtnetlink.h>
  13 #include <linux/slab.h>
  14 #include <net/net_namespace.h>
  15 #include <linux/rcupdate.h>
  16 #include <linux/if_ether.h>
  17 #include <net/cfg80211.h>
  18 #include "ieee80211_i.h"
  19 #include "driver-ops.h"
  20 #include "cfg.h"
  21 #include "rate.h"
  22 #include "mesh.h"
  23 #include "wme.h"
  24
  25 static struct wireless_dev *ieee80211_add_iface(struct wiphy *wiphy,
  26                                                 const char *name,
  27                                                 unsigned char name_assign_type,
  28                                                 enum nl80211_iftype type,
  29                                                 u32 *flags,
  30                                                 struct vif_params *params)
  31 {
  32         struct ieee80211_local *local = wiphy_priv(wiphy);
  33         struct wireless_dev *wdev;
  34         struct ieee80211_sub_if_data *sdata;
  35         int err;
  36
  37         err = ieee80211_if_add(local, name, name_assign_type, &wdev, type, params);
  38         if (err)
  39                 return ERR_PTR(err);
  40
  41         if (type == NL80211_IFTYPE_MONITOR && flags) {
  42                 sdata = IEEE80211_WDEV_TO_SUB_IF(wdev);
  43                 sdata->u.mntr_flags = *flags;
  44         }
  45
  46         return wdev;
  47 }
  48
  49 static int ieee80211_del_iface(struct wiphy *wiphy, struct wireless_dev *wdev)
  50 {
  51         ieee80211_if_remove(IEEE80211_WDEV_TO_SUB_IF(wdev));
  52
  53         return 0;
  54 }
  55
  56 static int ieee80211_change_iface(struct wiphy *wiphy,
  57                                   struct net_device *dev,
  58                                   enum nl80211_iftype type, u32 *flags,
  59                                   struct vif_params *params)
  60 {
  61         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
  62         int ret;
  63
  64         ret = ieee80211_if_change_type(sdata, type);
  65         if (ret)
  66                 return ret;
  67
  68         if (type == NL80211_IFTYPE_AP_VLAN &&
  69             params && params->use_4addr == 0)
  70                 RCU_INIT_POINTER(sdata->u.vlan.sta, NULL);
  71         else if (type == NL80211_IFTYPE_STATION &&
  72                  params && params->use_4addr >= 0)
  73                 sdata->u.mgd.use_4addr = params->use_4addr;
  74
  75         if (sdata->vif.type == NL80211_IFTYPE_MONITOR && flags) {
  76                 struct ieee80211_local *local = sdata->local;
  77
  78                 if (ieee80211_sdata_running(sdata)) {
  79                         u32 mask = MONITOR_FLAG_COOK_FRAMES |
  80                                    MONITOR_FLAG_ACTIVE;
  81
  82                         /*
  83                          * Prohibit MONITOR_FLAG_COOK_FRAMES and
  84                          * MONITOR_FLAG_ACTIVE to be changed while the
  85                          * interface is up.
  86                          * Else we would need to add a lot of cruft
  87                          * to update everything:
  88                          *      cooked_mntrs, monitor and all fif_* counters
  89                          *      reconfigure hardware
  90                          */
  91                         if ((*flags & mask) != (sdata->u.mntr_flags & mask))
  92                                 return -EBUSY;
  93
  94                         ieee80211_adjust_monitor_flags(sdata, -1);
  95                         sdata->u.mntr_flags = *flags;
  96                         ieee80211_adjust_monitor_flags(sdata, 1);
  97
  98                         ieee80211_configure_filter(local);
  99                 } else {
 100                         /*
 101                          * Because the interface is down, ieee80211_do_stop
 102                          * and ieee80211_do_open take care of "everything"
 103                          * mentioned in the comment above.
 104                          */
 105                         sdata->u.mntr_flags = *flags;
 106                 }
 107         }
 108
 109         return 0;
 110 }
 111
 112 static int ieee80211_start_p2p_device(struct wiphy *wiphy,
 113                                       struct wireless_dev *wdev)
 114 {
 115         struct ieee80211_sub_if_data *sdata = IEEE80211_WDEV_TO_SUB_IF(wdev);
 116         int ret;
 117
 118         mutex_lock(&sdata->local->chanctx_mtx);
 119         ret = ieee80211_check_combinations(sdata, NULL, 0, 0);
 120         mutex_unlock(&sdata->local->chanctx_mtx);
 121         if (ret < 0)
 122                 return ret;
 123
 124         return ieee80211_do_open(wdev, true);
 125 }
 126
 127 static void ieee80211_stop_p2p_device(struct wiphy *wiphy,
 128                                       struct wireless_dev *wdev)
 129 {
 130         ieee80211_sdata_stop(IEEE80211_WDEV_TO_SUB_IF(wdev));
 131 }
 132
 133 static int ieee80211_set_noack_map(struct wiphy *wiphy,
 134                                   struct net_device *dev,
 135                                   u16 noack_map)
 136 {
 137         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 138
 139         sdata->noack_map = noack_map;
 140
 141         ieee80211_check_fast_xmit_iface(sdata);
 142
 143         return 0;
 144 }
 145
 146 static int ieee80211_add_key(struct wiphy *wiphy, struct net_device *dev,
 147                              u8 key_idx, bool pairwise, const u8 *mac_addr,
 148                              struct key_params *params)
 149 {
 150         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 151         struct ieee80211_local *local = sdata->local;
 152         struct sta_info *sta = NULL;
 153         const struct ieee80211_cipher_scheme *cs = NULL;
 154         struct ieee80211_key *key;
 155         int err;
 156
 157         if (!ieee80211_sdata_running(sdata))
 158                 return -ENETDOWN;
 159
 160         /* reject WEP and TKIP keys if WEP failed to initialize */
 161         switch (params->cipher) {
 162         case WLAN_CIPHER_SUITE_WEP40:
 163         case WLAN_CIPHER_SUITE_TKIP:
 164         case WLAN_CIPHER_SUITE_WEP104:
 165                 if (IS_ERR(local->wep_tx_tfm))
 166                         return -EINVAL;
 167                 break;
 168         case WLAN_CIPHER_SUITE_CCMP:
 169         case WLAN_CIPHER_SUITE_CCMP_256:
 170         case WLAN_CIPHER_SUITE_AES_CMAC:
 171         case WLAN_CIPHER_SUITE_BIP_CMAC_256:
 172         case WLAN_CIPHER_SUITE_BIP_GMAC_128:
 173         case WLAN_CIPHER_SUITE_BIP_GMAC_256:
 174         case WLAN_CIPHER_SUITE_GCMP:
 175         case WLAN_CIPHER_SUITE_GCMP_256:
 176                 break;
 177         default:
 178                 cs = ieee80211_cs_get(local, params->cipher, sdata->vif.type);
 179                 break;
 180         }
 181
 182         key = ieee80211_key_alloc(params->cipher, key_idx, params->key_len,
 183                                   params->key, params->seq_len, params->seq,
 184                                   cs);
 185         if (IS_ERR(key))
 186                 return PTR_ERR(key);
 187
 188         if (pairwise)
 189                 key->conf.flags |= IEEE80211_KEY_FLAG_PAIRWISE;
 190
 191         mutex_lock(&local->sta_mtx);
 192
 193         if (mac_addr) {
 194                 if (ieee80211_vif_is_mesh(&sdata->vif))
 195                         sta = sta_info_get(sdata, mac_addr);
 196                 else
 197                         sta = sta_info_get_bss(sdata, mac_addr);
 198                 /*
 199                  * The ASSOC test makes sure the driver is ready to
 200                  * receive the key. When wpa_supplicant has roamed
 201                  * using FT, it attempts to set the key before
 202                  * association has completed, this rejects that attempt
 203                  * so it will set the key again after association.
 204                  *
 205                  * TODO: accept the key if we have a station entry and
 206                  *       add it to the device after the station.
 207                  */
 208                 if (!sta || !test_sta_flag(sta, WLAN_STA_ASSOC)) {
 209                         ieee80211_key_free_unused(key);
 210                         err = -ENOENT;
 211                         goto out_unlock;
 212                 }
 213         }
 214
 215         switch (sdata->vif.type) {
 216         case NL80211_IFTYPE_STATION:
 217                 if (sdata->u.mgd.mfp != IEEE80211_MFP_DISABLED)
 218                         key->conf.flags |= IEEE80211_KEY_FLAG_RX_MGMT;
 219                 break;
 220         case NL80211_IFTYPE_AP:
 221         case NL80211_IFTYPE_AP_VLAN:
 222                 /* Keys without a station are used for TX only */
 223                 if (key->sta && test_sta_flag(key->sta, WLAN_STA_MFP))
 224                         key->conf.flags |= IEEE80211_KEY_FLAG_RX_MGMT;
 225                 break;
 226         case NL80211_IFTYPE_ADHOC:
 227                 /* no MFP (yet) */
 228                 break;
 229         case NL80211_IFTYPE_MESH_POINT:
 230 #ifdef CONFIG_MAC80211_MESH
 231                 if (sdata->u.mesh.security != IEEE80211_MESH_SEC_NONE)
 232                         key->conf.flags |= IEEE80211_KEY_FLAG_RX_MGMT;
 233                 break;
 234 #endif
 235         case NL80211_IFTYPE_WDS:
 236         case NL80211_IFTYPE_MONITOR:
 237         case NL80211_IFTYPE_P2P_DEVICE:
 238         case NL80211_IFTYPE_UNSPECIFIED:
 239         case NUM_NL80211_IFTYPES:
 240         case NL80211_IFTYPE_P2P_CLIENT:
 241         case NL80211_IFTYPE_P2P_GO:
 242         case NL80211_IFTYPE_OCB:
 243                 /* shouldn't happen */
 244                 WARN_ON_ONCE(1);
 245                 break;
 246         }
 247
 248         if (sta)
 249                 sta->cipher_scheme = cs;
 250
 251         err = ieee80211_key_link(key, sdata, sta);
 252
 253  out_unlock:
 254         mutex_unlock(&local->sta_mtx);
 255
 256         return err;
 257 }
 258
 259 static int ieee80211_del_key(struct wiphy *wiphy, struct net_device *dev,
 260                              u8 key_idx, bool pairwise, const u8 *mac_addr)
 261 {
 262         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 263         struct ieee80211_local *local = sdata->local;
 264         struct sta_info *sta;
 265         struct ieee80211_key *key = NULL;
 266         int ret;
 267
 268         mutex_lock(&local->sta_mtx);
 269         mutex_lock(&local->key_mtx);
 270
 271         if (mac_addr) {
 272                 ret = -ENOENT;
 273
 274                 sta = sta_info_get_bss(sdata, mac_addr);
 275                 if (!sta)
 276                         goto out_unlock;
 277
 278                 if (pairwise)
 279                         key = key_mtx_dereference(local, sta->ptk[key_idx]);
 280                 else
 281                         key = key_mtx_dereference(local, sta->gtk[key_idx]);
 282         } else
 283                 key = key_mtx_dereference(local, sdata->keys[key_idx]);
 284
 285         if (!key) {
 286                 ret = -ENOENT;
 287                 goto out_unlock;
 288         }
 289
 290         ieee80211_key_free(key, true);
 291
 292         ret = 0;
 293  out_unlock:
 294         mutex_unlock(&local->key_mtx);
 295         mutex_unlock(&local->sta_mtx);
 296
 297         return ret;
 298 }
 299
 300 static int ieee80211_get_key(struct wiphy *wiphy, struct net_device *dev,
 301                              u8 key_idx, bool pairwise, const u8 *mac_addr,
 302                              void *cookie,
 303                              void (*callback)(void *cookie,
 304                                               struct key_params *params))
 305 {
 306         struct ieee80211_sub_if_data *sdata;
 307         struct sta_info *sta = NULL;
 308         u8 seq[6] = {0};
 309         struct key_params params;
 310         struct ieee80211_key *key = NULL;
 311         u64 pn64;
 312         u32 iv32;
 313         u16 iv16;
 314         int err = -ENOENT;
 315         struct ieee80211_key_seq kseq = {};
 316
 317         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 318
 319         rcu_read_lock();
 320
 321         if (mac_addr) {
 322                 sta = sta_info_get_bss(sdata, mac_addr);
 323                 if (!sta)
 324                         goto out;
 325
 326                 if (pairwise && key_idx < NUM_DEFAULT_KEYS)
 327                         key = rcu_dereference(sta->ptk[key_idx]);
 328                 else if (!pairwise &&
 329                          key_idx < NUM_DEFAULT_KEYS + NUM_DEFAULT_MGMT_KEYS)
 330                         key = rcu_dereference(sta->gtk[key_idx]);
 331         } else
 332                 key = rcu_dereference(sdata->keys[key_idx]);
 333
 334         if (!key)
 335                 goto out;
 336
 337         memset(&params, 0, sizeof(params));
 338
 339         params.cipher = key->conf.cipher;
 340
 341         switch (key->conf.cipher) {
 342         case WLAN_CIPHER_SUITE_TKIP:
 343                 iv32 = key->u.tkip.tx.iv32;
 344                 iv16 = key->u.tkip.tx.iv16;
 345
 346                 if (key->flags & KEY_FLAG_UPLOADED_TO_HARDWARE &&
 347                     !(key->conf.flags & IEEE80211_KEY_FLAG_GENERATE_IV)) {
 348                         drv_get_key_seq(sdata->local, key, &kseq);
 349                         iv32 = kseq.tkip.iv32;
 350                         iv16 = kseq.tkip.iv16;
 351                 }
 352
 353                 seq[0] = iv16 & 0xff;
 354                 seq[1] = (iv16 >> 8) & 0xff;
 355                 seq[2] = iv32 & 0xff;
 356                 seq[3] = (iv32 >> 8) & 0xff;
 357                 seq[4] = (iv32 >> 16) & 0xff;
 358                 seq[5] = (iv32 >> 24) & 0xff;
 359                 params.seq = seq;
 360                 params.seq_len = 6;
 361                 break;
 362         case WLAN_CIPHER_SUITE_CCMP:
 363         case WLAN_CIPHER_SUITE_CCMP_256:
 364         case WLAN_CIPHER_SUITE_AES_CMAC:
 365         case WLAN_CIPHER_SUITE_BIP_CMAC_256:
 366                 BUILD_BUG_ON(offsetof(typeof(kseq), ccmp) !=
 367                              offsetof(typeof(kseq), aes_cmac));
 368         case WLAN_CIPHER_SUITE_BIP_GMAC_128:
 369         case WLAN_CIPHER_SUITE_BIP_GMAC_256:
 370                 BUILD_BUG_ON(offsetof(typeof(kseq), ccmp) !=
 371                              offsetof(typeof(kseq), aes_gmac));
 372         case WLAN_CIPHER_SUITE_GCMP:
 373         case WLAN_CIPHER_SUITE_GCMP_256:
 374                 BUILD_BUG_ON(offsetof(typeof(kseq), ccmp) !=
 375                              offsetof(typeof(kseq), gcmp));
 376
 377                 if (key->flags & KEY_FLAG_UPLOADED_TO_HARDWARE &&
 378                     !(key->conf.flags & IEEE80211_KEY_FLAG_GENERATE_IV)) {
 379                         drv_get_key_seq(sdata->local, key, &kseq);
 380                         memcpy(seq, kseq.ccmp.pn, 6);
 381                 } else {
 382                         pn64 = atomic64_read(&key->conf.tx_pn);
 383                         seq[0] = pn64;
 384                         seq[1] = pn64 >> 8;
 385                         seq[2] = pn64 >> 16;
 386                         seq[3] = pn64 >> 24;
 387                         seq[4] = pn64 >> 32;
 388                         seq[5] = pn64 >> 40;
 389                 }
 390                 params.seq = seq;
 391                 params.seq_len = 6;
 392                 break;
 393         default:
 394                 if (!(key->flags & KEY_FLAG_UPLOADED_TO_HARDWARE))
 395                         break;
 396                 if (WARN_ON(key->conf.flags & IEEE80211_KEY_FLAG_GENERATE_IV))
 397                         break;
 398                 drv_get_key_seq(sdata->local, key, &kseq);
 399                 params.seq = kseq.hw.seq;
 400                 params.seq_len = kseq.hw.seq_len;
 401                 break;
 402         }
 403
 404         params.key = key->conf.key;
 405         params.key_len = key->conf.keylen;
 406
 407         callback(cookie, &params);
 408         err = 0;
 409
 410  out:
 411         rcu_read_unlock();
 412         return err;
 413 }
 414
 415 static int ieee80211_config_default_key(struct wiphy *wiphy,
 416                                         struct net_device *dev,
 417                                         u8 key_idx, bool uni,
 418                                         bool multi)
 419 {
 420         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 421
 422         ieee80211_set_default_key(sdata, key_idx, uni, multi);
 423
 424         return 0;
 425 }
 426
 427 static int ieee80211_config_default_mgmt_key(struct wiphy *wiphy,
 428                                              struct net_device *dev,
 429                                              u8 key_idx)
 430 {
 431         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 432
 433         ieee80211_set_default_mgmt_key(sdata, key_idx);
 434
 435         return 0;
 436 }
 437
 438 void sta_set_rate_info_tx(struct sta_info *sta,
 439                           const struct ieee80211_tx_rate *rate,
 440                           struct rate_info *rinfo)
 441 {
 442         rinfo->flags = 0;
 443         if (rate->flags & IEEE80211_TX_RC_MCS) {
 444                 rinfo->flags |= RATE_INFO_FLAGS_MCS;
 445                 rinfo->mcs = rate->idx;
 446         } else if (rate->flags & IEEE80211_TX_RC_VHT_MCS) {
 447                 rinfo->flags |= RATE_INFO_FLAGS_VHT_MCS;
 448                 rinfo->mcs = ieee80211_rate_get_vht_mcs(rate);
 449                 rinfo->nss = ieee80211_rate_get_vht_nss(rate);
 450         } else {
 451                 struct ieee80211_supported_band *sband;
 452                 int shift = ieee80211_vif_get_shift(&sta->sdata->vif);
 453                 u16 brate;
 454
 455                 sband = sta->local->hw.wiphy->bands[
 456                                 ieee80211_get_sdata_band(sta->sdata)];
 457                 brate = sband->bitrates[rate->idx].bitrate;
 458                 rinfo->legacy = DIV_ROUND_UP(brate, 1 << shift);
 459         }
 460         if (rate->flags & IEEE80211_TX_RC_40_MHZ_WIDTH)
 461                 rinfo->bw = RATE_INFO_BW_40;
 462         else if (rate->flags & IEEE80211_TX_RC_80_MHZ_WIDTH)
 463                 rinfo->bw = RATE_INFO_BW_80;
 464         else if (rate->flags & IEEE80211_TX_RC_160_MHZ_WIDTH)
 465                 rinfo->bw = RATE_INFO_BW_160;
 466         else
 467                 rinfo->bw = RATE_INFO_BW_20;
 468         if (rate->flags & IEEE80211_TX_RC_SHORT_GI)
 469                 rinfo->flags |= RATE_INFO_FLAGS_SHORT_GI;
 470 }
 471
 472 void sta_set_rate_info_rx(struct sta_info *sta, struct rate_info *rinfo)
 473 {
 474         rinfo->flags = 0;
 475
 476         if (sta->last_rx_rate_flag & RX_FLAG_HT) {
 477                 rinfo->flags |= RATE_INFO_FLAGS_MCS;
 478                 rinfo->mcs = sta->last_rx_rate_idx;
 479         } else if (sta->last_rx_rate_flag & RX_FLAG_VHT) {
 480                 rinfo->flags |= RATE_INFO_FLAGS_VHT_MCS;
 481                 rinfo->nss = sta->last_rx_rate_vht_nss;
 482                 rinfo->mcs = sta->last_rx_rate_idx;
 483         } else {
 484                 struct ieee80211_supported_band *sband;
 485                 int shift = ieee80211_vif_get_shift(&sta->sdata->vif);
 486                 u16 brate;
 487
 488                 sband = sta->local->hw.wiphy->bands[
 489                                 ieee80211_get_sdata_band(sta->sdata)];
 490                 brate = sband->bitrates[sta->last_rx_rate_idx].bitrate;
 491                 rinfo->legacy = DIV_ROUND_UP(brate, 1 << shift);
 492         }
 493
 494         if (sta->last_rx_rate_flag & RX_FLAG_SHORT_GI)
 495                 rinfo->flags |= RATE_INFO_FLAGS_SHORT_GI;
 496
 497         if (sta->last_rx_rate_flag & RX_FLAG_5MHZ)
 498                 rinfo->bw = RATE_INFO_BW_5;
 499         else if (sta->last_rx_rate_flag & RX_FLAG_10MHZ)
 500                 rinfo->bw = RATE_INFO_BW_10;
 501         else if (sta->last_rx_rate_flag & RX_FLAG_40MHZ)
 502                 rinfo->bw = RATE_INFO_BW_40;
 503         else if (sta->last_rx_rate_vht_flag & RX_VHT_FLAG_80MHZ)
 504                 rinfo->bw = RATE_INFO_BW_80;
 505         else if (sta->last_rx_rate_vht_flag & RX_VHT_FLAG_160MHZ)
 506                 rinfo->bw = RATE_INFO_BW_160;
 507         else
 508                 rinfo->bw = RATE_INFO_BW_20;
 509 }
 510
 511 static int ieee80211_dump_station(struct wiphy *wiphy, struct net_device *dev,
 512                                   int idx, u8 *mac, struct station_info *sinfo)
 513 {
 514         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 515         struct ieee80211_local *local = sdata->local;
 516         struct sta_info *sta;
 517         int ret = -ENOENT;
 518
 519         mutex_lock(&local->sta_mtx);
 520
 521         sta = sta_info_get_by_idx(sdata, idx);
 522         if (sta) {
 523                 ret = 0;
 524                 memcpy(mac, sta->sta.addr, ETH_ALEN);
 525                 sta_set_sinfo(sta, sinfo);
 526         }
 527
 528         mutex_unlock(&local->sta_mtx);
 529
 530         return ret;
 531 }
 532
 533 static int ieee80211_dump_survey(struct wiphy *wiphy, struct net_device *dev,
 534                                  int idx, struct survey_info *survey)
 535 {
 536         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
 537
 538         return drv_get_survey(local, idx, survey);
 539 }
 540
 541 static int ieee80211_get_station(struct wiphy *wiphy, struct net_device *dev,
 542                                  const u8 *mac, struct station_info *sinfo)
 543 {
 544         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 545         struct ieee80211_local *local = sdata->local;
 546         struct sta_info *sta;
 547         int ret = -ENOENT;
 548
 549         mutex_lock(&local->sta_mtx);
 550
 551         sta = sta_info_get_bss(sdata, mac);
 552         if (sta) {
 553                 ret = 0;
 554                 sta_set_sinfo(sta, sinfo);
 555         }
 556
 557         mutex_unlock(&local->sta_mtx);
 558
 559         return ret;
 560 }
 561
 562 static int ieee80211_set_monitor_channel(struct wiphy *wiphy,
 563                                          struct cfg80211_chan_def *chandef)
 564 {
 565         struct ieee80211_local *local = wiphy_priv(wiphy);
 566         struct ieee80211_sub_if_data *sdata;
 567         int ret = 0;
 568
 569         if (cfg80211_chandef_identical(&local->monitor_chandef, chandef))
 570                 return 0;
 571
 572         mutex_lock(&local->mtx);
 573         mutex_lock(&local->iflist_mtx);
 574         if (local->use_chanctx) {
 575                 sdata = rcu_dereference_protected(
 576                                 local->monitor_sdata,
 577                                 lockdep_is_held(&local->iflist_mtx));
 578                 if (sdata) {
 579                         ieee80211_vif_release_channel(sdata);
 580                         ret = ieee80211_vif_use_channel(sdata, chandef,
 581                                         IEEE80211_CHANCTX_EXCLUSIVE);
 582                 }
 583         } else if (local->open_count == local->monitors) {
 584                 local->_oper_chandef = *chandef;
 585                 ieee80211_hw_config(local, 0);
 586         }
 587
 588         if (ret == 0)
 589                 local->monitor_chandef = *chandef;
 590         mutex_unlock(&local->iflist_mtx);
 591         mutex_unlock(&local->mtx);
 592
 593         return ret;
 594 }
 595
 596 static int ieee80211_set_probe_resp(struct ieee80211_sub_if_data *sdata,
 597                                     const u8 *resp, size_t resp_len,
 598                                     const struct ieee80211_csa_settings *csa)
 599 {
 600         struct probe_resp *new, *old;
 601
 602         if (!resp || !resp_len)
 603                 return 1;
 604
 605         old = sdata_dereference(sdata->u.ap.probe_resp, sdata);
 606
 607         new = kzalloc(sizeof(struct probe_resp) + resp_len, GFP_KERNEL);
 608         if (!new)
 609                 return -ENOMEM;
 610
 611         new->len = resp_len;
 612         memcpy(new->data, resp, resp_len);
 613
 614         if (csa)
 615                 memcpy(new->csa_counter_offsets, csa->counter_offsets_presp,
 616                        csa->n_counter_offsets_presp *
 617                        sizeof(new->csa_counter_offsets[0]));
 618
 619         rcu_assign_pointer(sdata->u.ap.probe_resp, new);
 620         if (old)
 621                 kfree_rcu(old, rcu_head);
 622
 623         return 0;
 624 }
 625
 626 static int ieee80211_assign_beacon(struct ieee80211_sub_if_data *sdata,
 627                                    struct cfg80211_beacon_data *params,
 628                                    const struct ieee80211_csa_settings *csa)
 629 {
 630         struct beacon_data *new, *old;
 631         int new_head_len, new_tail_len;
 632         int size, err;
 633         u32 changed = BSS_CHANGED_BEACON;
 634
 635         old = sdata_dereference(sdata->u.ap.beacon, sdata);
 636
 637
 638         /* Need to have a beacon head if we don't have one yet */
 639         if (!params->head && !old)
 640                 return -EINVAL;
 641
 642         /* new or old head? */
 643         if (params->head)
 644                 new_head_len = params->head_len;
 645         else
 646                 new_head_len = old->head_len;
 647
 648         /* new or old tail? */
 649         if (params->tail || !old)
 650                 /* params->tail_len will be zero for !params->tail */
 651                 new_tail_len = params->tail_len;
 652         else
 653                 new_tail_len = old->tail_len;
 654
 655         size = sizeof(*new) + new_head_len + new_tail_len;
 656
 657         new = kzalloc(size, GFP_KERNEL);
 658         if (!new)
 659                 return -ENOMEM;
 660
 661         /* start filling the new info now */
 662
 663         /*
 664          * pointers go into the block we allocated,
 665          * memory is | beacon_data | head | tail |
 666          */
 667         new->head = ((u8 *) new) + sizeof(*new);
 668         new->tail = new->head + new_head_len;
 669         new->head_len = new_head_len;
 670         new->tail_len = new_tail_len;
 671
 672         if (csa) {
 673                 new->csa_current_counter = csa->count;
 674                 memcpy(new->csa_counter_offsets, csa->counter_offsets_beacon,
 675                        csa->n_counter_offsets_beacon *
 676                        sizeof(new->csa_counter_offsets[0]));
 677         }
 678
 679         /* copy in head */
 680         if (params->head)
 681                 memcpy(new->head, params->head, new_head_len);
 682         else
 683                 memcpy(new->head, old->head, new_head_len);
 684
 685         /* copy in optional tail */
 686         if (params->tail)
 687                 memcpy(new->tail, params->tail, new_tail_len);
 688         else
 689                 if (old)
 690                         memcpy(new->tail, old->tail, new_tail_len);
 691
 692         err = ieee80211_set_probe_resp(sdata, params->probe_resp,
 693                                        params->probe_resp_len, csa);
 694         if (err < 0)
 695                 return err;
 696         if (err == 0)
 697                 changed |= BSS_CHANGED_AP_PROBE_RESP;
 698
 699         rcu_assign_pointer(sdata->u.ap.beacon, new);
 700
 701         if (old)
 702                 kfree_rcu(old, rcu_head);
 703
 704         return changed;
 705 }
 706
 707 static int ieee80211_start_ap(struct wiphy *wiphy, struct net_device *dev,
 708                               struct cfg80211_ap_settings *params)
 709 {
 710         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 711         struct ieee80211_local *local = sdata->local;
 712         struct beacon_data *old;
 713         struct ieee80211_sub_if_data *vlan;
 714         u32 changed = BSS_CHANGED_BEACON_INT |
 715                       BSS_CHANGED_BEACON_ENABLED |
 716                       BSS_CHANGED_BEACON |
 717                       BSS_CHANGED_SSID |
 718                       BSS_CHANGED_P2P_PS |
 719                       BSS_CHANGED_TXPOWER;
 720         int err;
 721
 722         old = sdata_dereference(sdata->u.ap.beacon, sdata);
 723         if (old)
 724                 return -EALREADY;
 725
 726         switch (params->smps_mode) {
 727         case NL80211_SMPS_OFF:
 728                 sdata->smps_mode = IEEE80211_SMPS_OFF;
 729                 break;
 730         case NL80211_SMPS_STATIC:
 731                 sdata->smps_mode = IEEE80211_SMPS_STATIC;
 732                 break;
 733         case NL80211_SMPS_DYNAMIC:
 734                 sdata->smps_mode = IEEE80211_SMPS_DYNAMIC;
 735                 break;
 736         default:
 737                 return -EINVAL;
 738         }
 739         sdata->needed_rx_chains = sdata->local->rx_chains;
 740
 741         mutex_lock(&local->mtx);
 742         err = ieee80211_vif_use_channel(sdata, &params->chandef,
 743                                         IEEE80211_CHANCTX_SHARED);
 744         if (!err)
 745                 ieee80211_vif_copy_chanctx_to_vlans(sdata, false);
 746         mutex_unlock(&local->mtx);
 747         if (err)
 748                 return err;
 749
 750         /*
 751          * Apply control port protocol, this allows us to
 752          * not encrypt dynamic WEP control frames.
 753          */
 754         sdata->control_port_protocol = params->crypto.control_port_ethertype;
 755         sdata->control_port_no_encrypt = params->crypto.control_port_no_encrypt;
 756         sdata->encrypt_headroom = ieee80211_cs_headroom(sdata->local,
 757                                                         &params->crypto,
 758                                                         sdata->vif.type);
 759
 760         list_for_each_entry(vlan, &sdata->u.ap.vlans, u.vlan.list) {
 761                 vlan->control_port_protocol =
 762                         params->crypto.control_port_ethertype;
 763                 vlan->control_port_no_encrypt =
 764                         params->crypto.control_port_no_encrypt;
 765                 vlan->encrypt_headroom =
 766                         ieee80211_cs_headroom(sdata->local,
 767                                               &params->crypto,
 768                                               vlan->vif.type);
 769         }
 770
 771         sdata->vif.bss_conf.beacon_int = params->beacon_interval;
 772         sdata->vif.bss_conf.dtim_period = params->dtim_period;
 773         sdata->vif.bss_conf.enable_beacon = true;
 774
 775         sdata->vif.bss_conf.ssid_len = params->ssid_len;
 776         if (params->ssid_len)
 777                 memcpy(sdata->vif.bss_conf.ssid, params->ssid,
 778                        params->ssid_len);
 779         sdata->vif.bss_conf.hidden_ssid =
 780                 (params->hidden_ssid != NL80211_HIDDEN_SSID_NOT_IN_USE);
 781
 782         memset(&sdata->vif.bss_conf.p2p_noa_attr, 0,
 783                sizeof(sdata->vif.bss_conf.p2p_noa_attr));
 784         sdata->vif.bss_conf.p2p_noa_attr.oppps_ctwindow =
 785                 params->p2p_ctwindow & IEEE80211_P2P_OPPPS_CTWINDOW_MASK;
 786         if (params->p2p_opp_ps)
 787                 sdata->vif.bss_conf.p2p_noa_attr.oppps_ctwindow |=
 788                                         IEEE80211_P2P_OPPPS_ENABLE_BIT;
 789
 790         err = ieee80211_assign_beacon(sdata, &params->beacon, NULL);
 791         if (err < 0) {
 792                 ieee80211_vif_release_channel(sdata);
 793                 return err;
 794         }
 795         changed |= err;
 796
 797         err = drv_start_ap(sdata->local, sdata);
 798         if (err) {
 799                 old = sdata_dereference(sdata->u.ap.beacon, sdata);
 800
 801                 if (old)
 802                         kfree_rcu(old, rcu_head);
 803                 RCU_INIT_POINTER(sdata->u.ap.beacon, NULL);
 804                 ieee80211_vif_release_channel(sdata);
 805                 return err;
 806         }
 807
 808         ieee80211_recalc_dtim(local, sdata);
 809         ieee80211_bss_info_change_notify(sdata, changed);
 810
 811         netif_carrier_on(dev);
 812         list_for_each_entry(vlan, &sdata->u.ap.vlans, u.vlan.list)
 813                 netif_carrier_on(vlan->dev);
 814
 815         return 0;
 816 }
 817
 818 static int ieee80211_change_beacon(struct wiphy *wiphy, struct net_device *dev,
 819                                    struct cfg80211_beacon_data *params)
 820 {
 821         struct ieee80211_sub_if_data *sdata;
 822         struct beacon_data *old;
 823         int err;
 824
 825         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 826         sdata_assert_lock(sdata);
 827
 828         /* don't allow changing the beacon while CSA is in place - offset
 829          * of channel switch counter may change
 830          */
 831         if (sdata->vif.csa_active)
 832                 return -EBUSY;
 833
 834         old = sdata_dereference(sdata->u.ap.beacon, sdata);
 835         if (!old)
 836                 return -ENOENT;
 837
 838         err = ieee80211_assign_beacon(sdata, params, NULL);
 839         if (err < 0)
 840                 return err;
 841         ieee80211_bss_info_change_notify(sdata, err);
 842         return 0;
 843 }
 844
 845 static int ieee80211_stop_ap(struct wiphy *wiphy, struct net_device *dev)
 846 {
 847         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 848         struct ieee80211_sub_if_data *vlan;
 849         struct ieee80211_local *local = sdata->local;
 850         struct beacon_data *old_beacon;
 851         struct probe_resp *old_probe_resp;
 852         struct cfg80211_chan_def chandef;
 853
 854         sdata_assert_lock(sdata);
 855
 856         old_beacon = sdata_dereference(sdata->u.ap.beacon, sdata);
 857         if (!old_beacon)
 858                 return -ENOENT;
 859         old_probe_resp = sdata_dereference(sdata->u.ap.probe_resp, sdata);
 860
 861         /* abort any running channel switch */
 862         mutex_lock(&local->mtx);
 863         sdata->vif.csa_active = false;
 864         if (sdata->csa_block_tx) {
 865                 ieee80211_wake_vif_queues(local, sdata,
 866                                           IEEE80211_QUEUE_STOP_REASON_CSA);
 867                 sdata->csa_block_tx = false;
 868         }
 869
 870         mutex_unlock(&local->mtx);
 871
 872         kfree(sdata->u.ap.next_beacon);
 873         sdata->u.ap.next_beacon = NULL;
 874
 875         /* turn off carrier for this interface and dependent VLANs */
 876         list_for_each_entry(vlan, &sdata->u.ap.vlans, u.vlan.list)
 877                 netif_carrier_off(vlan->dev);
 878         netif_carrier_off(dev);
 879
 880         /* remove beacon and probe response */
 881         RCU_INIT_POINTER(sdata->u.ap.beacon, NULL);
 882         RCU_INIT_POINTER(sdata->u.ap.probe_resp, NULL);
 883         kfree_rcu(old_beacon, rcu_head);
 884         if (old_probe_resp)
 885                 kfree_rcu(old_probe_resp, rcu_head);
 886         sdata->u.ap.driver_smps_mode = IEEE80211_SMPS_OFF;
 887
 888         __sta_info_flush(sdata, true);
 889         ieee80211_free_keys(sdata, true);
 890
 891         sdata->vif.bss_conf.enable_beacon = false;
 892         sdata->vif.bss_conf.ssid_len = 0;
 893         clear_bit(SDATA_STATE_OFFCHANNEL_BEACON_STOPPED, &sdata->state);
 894         ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BEACON_ENABLED);
 895
 896         if (sdata->wdev.cac_started) {
 897                 chandef = sdata->vif.bss_conf.chandef;
 898                 cancel_delayed_work_sync(&sdata->dfs_cac_timer_work);
 899                 cfg80211_cac_event(sdata->dev, &chandef,
 900                                    NL80211_RADAR_CAC_ABORTED,
 901                                    GFP_KERNEL);
 902         }
 903
 904         drv_stop_ap(sdata->local, sdata);
 905
 906         /* free all potentially still buffered bcast frames */
 907         local->total_ps_buffered -= skb_queue_len(&sdata->u.ap.ps.bc_buf);
 908         skb_queue_purge(&sdata->u.ap.ps.bc_buf);
 909
 910         mutex_lock(&local->mtx);
 911         ieee80211_vif_copy_chanctx_to_vlans(sdata, true);
 912         ieee80211_vif_release_channel(sdata);
 913         mutex_unlock(&local->mtx);
 914
 915         return 0;
 916 }
 917
 918 /* Layer 2 Update frame (802.2 Type 1 LLC XID Update response) */
 919 struct iapp_layer2_update {
 920         u8 da[ETH_ALEN];        /* broadcast */
 921         u8 sa[ETH_ALEN];        /* STA addr */
 922         __be16 len;             /* 6 */
 923         u8 dsap;                /* 0 */
 924         u8 ssap;                /* 0 */
 925         u8 control;
 926         u8 xid_info[3];
 927 } __packed;
 928
 929 static void ieee80211_send_layer2_update(struct sta_info *sta)
 930 {
 931         struct iapp_layer2_update *msg;
 932         struct sk_buff *skb;
 933
 934         /* Send Level 2 Update Frame to update forwarding tables in layer 2
 935          * bridge devices */
 936
 937         skb = dev_alloc_skb(sizeof(*msg));
 938         if (!skb)
 939                 return;
 940         msg = (struct iapp_layer2_update *)skb_put(skb, sizeof(*msg));
 941
 942         /* 802.2 Type 1 Logical Link Control (LLC) Exchange Identifier (XID)
 943          * Update response frame; IEEE Std 802.2-1998, 5.4.1.2.1 */
 944
 945         eth_broadcast_addr(msg->da);
 946         memcpy(msg->sa, sta->sta.addr, ETH_ALEN);
 947         msg->len = htons(6);
 948         msg->dsap = 0;
 949         msg->ssap = 0x01;       /* NULL LSAP, CR Bit: Response */
 950         msg->control = 0xaf;    /* XID response lsb.1111F101.
 951                                  * F=0 (no poll command; unsolicited frame) */
 952         msg->xid_info[0] = 0x81;        /* XID format identifier */
 953         msg->xid_info[1] = 1;   /* LLC types/classes: Type 1 LLC */
 954         msg->xid_info[2] = 0;   /* XID sender's receive window size (RW) */
 955
 956         skb->dev = sta->sdata->dev;
 957         skb->protocol = eth_type_trans(skb, sta->sdata->dev);
 958         memset(skb->cb, 0, sizeof(skb->cb));
 959         netif_rx_ni(skb);
 960 }
 961
 962 static int sta_apply_auth_flags(struct ieee80211_local *local,
 963                                 struct sta_info *sta,
 964                                 u32 mask, u32 set)
 965 {
 966         int ret;
 967
 968         if (mask & BIT(NL80211_STA_FLAG_AUTHENTICATED) &&
 969             set & BIT(NL80211_STA_FLAG_AUTHENTICATED) &&
 970             !test_sta_flag(sta, WLAN_STA_AUTH)) {
 971                 ret = sta_info_move_state(sta, IEEE80211_STA_AUTH);
 972                 if (ret)
 973                         return ret;
 974         }
 975
 976         if (mask & BIT(NL80211_STA_FLAG_ASSOCIATED) &&
 977             set & BIT(NL80211_STA_FLAG_ASSOCIATED) &&
 978             !test_sta_flag(sta, WLAN_STA_ASSOC)) {
 979                 /*
 980                  * When peer becomes associated, init rate control as
 981                  * well. Some drivers require rate control initialized
 982                  * before drv_sta_state() is called.
 983                  */
 984                 if (test_sta_flag(sta, WLAN_STA_TDLS_PEER))
 985                         rate_control_rate_init(sta);
 986
 987                 ret = sta_info_move_state(sta, IEEE80211_STA_ASSOC);
 988                 if (ret)
 989                         return ret;
 990         }
 991
 992         if (mask & BIT(NL80211_STA_FLAG_AUTHORIZED)) {
 993                 if (set & BIT(NL80211_STA_FLAG_AUTHORIZED))
 994                         ret = sta_info_move_state(sta, IEEE80211_STA_AUTHORIZED);
 995                 else if (test_sta_flag(sta, WLAN_STA_AUTHORIZED))
 996                         ret = sta_info_move_state(sta, IEEE80211_STA_ASSOC);
 997                 else
 998                         ret = 0;
 999                 if (ret)
1000                         return ret;
1001         }
1002
1003         if (mask & BIT(NL80211_STA_FLAG_ASSOCIATED) &&
1004             !(set & BIT(NL80211_STA_FLAG_ASSOCIATED)) &&
1005             test_sta_flag(sta, WLAN_STA_ASSOC)) {
1006                 ret = sta_info_move_state(sta, IEEE80211_STA_AUTH);
1007                 if (ret)
1008                         return ret;
1009         }
1010
1011         if (mask & BIT(NL80211_STA_FLAG_AUTHENTICATED) &&
1012             !(set & BIT(NL80211_STA_FLAG_AUTHENTICATED)) &&
1013             test_sta_flag(sta, WLAN_STA_AUTH)) {
1014                 ret = sta_info_move_state(sta, IEEE80211_STA_NONE);
1015                 if (ret)
1016                         return ret;
1017         }
1018
1019         return 0;
1020 }
1021
1022 static void sta_apply_mesh_params(struct ieee80211_local *local,
1023                                   struct sta_info *sta,
1024                                   struct station_parameters *params)
1025 {
1026 #ifdef CONFIG_MAC80211_MESH
1027         struct ieee80211_sub_if_data *sdata = sta->sdata;
1028         u32 changed = 0;
1029
1030         if (params->sta_modify_mask & STATION_PARAM_APPLY_PLINK_STATE) {
1031                 switch (params->plink_state) {
1032                 case NL80211_PLINK_ESTAB:
1033                         if (sta->mesh->plink_state != NL80211_PLINK_ESTAB)
1034                                 changed = mesh_plink_inc_estab_count(sdata);
1035                         sta->mesh->plink_state = params->plink_state;
1036
1037                         ieee80211_mps_sta_status_update(sta);
1038                         changed |= ieee80211_mps_set_sta_local_pm(sta,
1039                                       sdata->u.mesh.mshcfg.power_mode);
1040                         break;
1041                 case NL80211_PLINK_LISTEN:
1042                 case NL80211_PLINK_BLOCKED:
1043                 case NL80211_PLINK_OPN_SNT:
1044                 case NL80211_PLINK_OPN_RCVD:
1045                 case NL80211_PLINK_CNF_RCVD:
1046                 case NL80211_PLINK_HOLDING:
1047                         if (sta->mesh->plink_state == NL80211_PLINK_ESTAB)
1048                                 changed = mesh_plink_dec_estab_count(sdata);
1049                         sta->mesh->plink_state = params->plink_state;
1050
1051                         ieee80211_mps_sta_status_update(sta);
1052                         changed |= ieee80211_mps_set_sta_local_pm(sta,
1053                                         NL80211_MESH_POWER_UNKNOWN);
1054                         break;
1055                 default:
1056                         /*  nothing  */
1057                         break;
1058                 }
1059         }
1060
1061         switch (params->plink_action) {
1062         case NL80211_PLINK_ACTION_NO_ACTION:
1063                 /* nothing */
1064                 break;
1065         case NL80211_PLINK_ACTION_OPEN:
1066                 changed |= mesh_plink_open(sta);
1067                 break;
1068         case NL80211_PLINK_ACTION_BLOCK:
1069                 changed |= mesh_plink_block(sta);
1070                 break;
1071         }
1072
1073         if (params->local_pm)
1074                 changed |= ieee80211_mps_set_sta_local_pm(sta,
1075                                                           params->local_pm);
1076
1077         ieee80211_mbss_info_change_notify(sdata, changed);
1078 #endif
1079 }
1080
1081 static int sta_apply_parameters(struct ieee80211_local *local,
1082                                 struct sta_info *sta,
1083                                 struct station_parameters *params)
1084 {
1085         int ret = 0;
1086         struct ieee80211_supported_band *sband;
1087         struct ieee80211_sub_if_data *sdata = sta->sdata;
1088         enum ieee80211_band band = ieee80211_get_sdata_band(sdata);
1089         u32 mask, set;
1090
1091         sband = local->hw.wiphy->bands[band];
1092
1093         mask = params->sta_flags_mask;
1094         set = params->sta_flags_set;
1095
1096         if (ieee80211_vif_is_mesh(&sdata->vif)) {
1097                 /*
1098                  * In mesh mode, ASSOCIATED isn't part of the nl80211
1099                  * API but must follow AUTHENTICATED for driver state.
1100                  */
1101                 if (mask & BIT(NL80211_STA_FLAG_AUTHENTICATED))
1102                         mask |= BIT(NL80211_STA_FLAG_ASSOCIATED);
1103                 if (set & BIT(NL80211_STA_FLAG_AUTHENTICATED))
1104                         set |= BIT(NL80211_STA_FLAG_ASSOCIATED);
1105         } else if (test_sta_flag(sta, WLAN_STA_TDLS_PEER)) {
1106                 /*
1107                  * TDLS -- everything follows authorized, but
1108                  * only becoming authorized is possible, not
1109                  * going back
1110                  */
1111                 if (set & BIT(NL80211_STA_FLAG_AUTHORIZED)) {
1112                         set |= BIT(NL80211_STA_FLAG_AUTHENTICATED) |
1113                                BIT(NL80211_STA_FLAG_ASSOCIATED);
1114                         mask |= BIT(NL80211_STA_FLAG_AUTHENTICATED) |
1115                                 BIT(NL80211_STA_FLAG_ASSOCIATED);
1116                 }
1117         }
1118
1119         if (mask & BIT(NL80211_STA_FLAG_WME) &&
1120             local->hw.queues >= IEEE80211_NUM_ACS)
1121                 sta->sta.wme = set & BIT(NL80211_STA_FLAG_WME);
1122
1123         /* auth flags will be set later for TDLS stations */
1124         if (!test_sta_flag(sta, WLAN_STA_TDLS_PEER)) {
1125                 ret = sta_apply_auth_flags(local, sta, mask, set);
1126                 if (ret)
1127                         return ret;
1128         }
1129
1130         if (mask & BIT(NL80211_STA_FLAG_SHORT_PREAMBLE)) {
1131                 if (set & BIT(NL80211_STA_FLAG_SHORT_PREAMBLE))
1132                         set_sta_flag(sta, WLAN_STA_SHORT_PREAMBLE);
1133                 else
1134                         clear_sta_flag(sta, WLAN_STA_SHORT_PREAMBLE);
1135         }
1136
1137         if (mask & BIT(NL80211_STA_FLAG_MFP)) {
1138                 if (set & BIT(NL80211_STA_FLAG_MFP))
1139                         set_sta_flag(sta, WLAN_STA_MFP);
1140                 else
1141                         clear_sta_flag(sta, WLAN_STA_MFP);
1142         }
1143
1144         if (mask & BIT(NL80211_STA_FLAG_TDLS_PEER)) {
1145                 if (set & BIT(NL80211_STA_FLAG_TDLS_PEER))
1146                         set_sta_flag(sta, WLAN_STA_TDLS_PEER);
1147                 else
1148                         clear_sta_flag(sta, WLAN_STA_TDLS_PEER);
1149         }
1150
1151         /* mark TDLS channel switch support, if the AP allows it */
1152         if (test_sta_flag(sta, WLAN_STA_TDLS_PEER) &&
1153             !sdata->u.mgd.tdls_chan_switch_prohibited &&
1154             params->ext_capab_len >= 4 &&
1155             params->ext_capab[3] & WLAN_EXT_CAPA4_TDLS_CHAN_SWITCH)
1156                 set_sta_flag(sta, WLAN_STA_TDLS_CHAN_SWITCH);
1157
1158         if (test_sta_flag(sta, WLAN_STA_TDLS_PEER) &&
1159             ieee80211_hw_check(&local->hw, TDLS_WIDER_BW) &&
1160             params->ext_capab_len >= 8 &&
1161             params->ext_capab[7] & WLAN_EXT_CAPA8_TDLS_WIDE_BW_ENABLED)
1162                 set_sta_flag(sta, WLAN_STA_TDLS_WIDER_BW);
1163
1164         if (params->sta_modify_mask & STATION_PARAM_APPLY_UAPSD) {
1165                 sta->sta.uapsd_queues = params->uapsd_queues;
1166                 sta->sta.max_sp = params->max_sp;
1167         }
1168
1169         /*
1170          * cfg80211 validates this (1-2007) and allows setting the AID
1171          * only when creating a new station entry
1172          */
1173         if (params->aid)
1174                 sta->sta.aid = params->aid;
1175
1176         /*
1177          * Some of the following updates would be racy if called on an
1178          * existing station, via ieee80211_change_station(). However,
1179          * all such changes are rejected by cfg80211 except for updates
1180          * changing the supported rates on an existing but not yet used
1181          * TDLS peer.
1182          */
1183
1184         if (params->listen_interval >= 0)
1185                 sta->listen_interval = params->listen_interval;
1186
1187         if (params->supported_rates) {
1188                 ieee80211_parse_bitrates(&sdata->vif.bss_conf.chandef,
1189                                          sband, params->supported_rates,
1190                                          params->supported_rates_len,
1191                                          &sta->sta.supp_rates[band]);
1192         }
1193
1194         if (params->ht_capa)
1195                 ieee80211_ht_cap_ie_to_sta_ht_cap(sdata, sband,
1196                                                   params->ht_capa, sta);
1197
1198         if (params->vht_capa)
1199                 ieee80211_vht_cap_ie_to_sta_vht_cap(sdata, sband,
1200                                                     params->vht_capa, sta);
1201
1202         if (params->opmode_notif_used) {
1203                 /* returned value is only needed for rc update, but the
1204                  * rc isn't initialized here yet, so ignore it
1205                  */
1206                 __ieee80211_vht_handle_opmode(sdata, sta,
1207                                               params->opmode_notif,
1208                                               band, false);
1209         }
1210
1211         if (ieee80211_vif_is_mesh(&sdata->vif))
1212                 sta_apply_mesh_params(local, sta, params);
1213
1214         /* set the STA state after all sta info from usermode has been set */
1215         if (test_sta_flag(sta, WLAN_STA_TDLS_PEER)) {
1216                 ret = sta_apply_auth_flags(local, sta, mask, set);
1217                 if (ret)
1218                         return ret;
1219         }
1220
1221         return 0;
1222 }
1223
1224 static int ieee80211_add_station(struct wiphy *wiphy, struct net_device *dev,
1225                                  const u8 *mac,
1226                                  struct station_parameters *params)
1227 {
1228         struct ieee80211_local *local = wiphy_priv(wiphy);
1229         struct sta_info *sta;
1230         struct ieee80211_sub_if_data *sdata;
1231         int err;
1232         int layer2_update;
1233
1234         if (params->vlan) {
1235                 sdata = IEEE80211_DEV_TO_SUB_IF(params->vlan);
1236
1237                 if (sdata->vif.type != NL80211_IFTYPE_AP_VLAN &&
1238                     sdata->vif.type != NL80211_IFTYPE_AP)
1239                         return -EINVAL;
1240         } else
1241                 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1242
1243         if (ether_addr_equal(mac, sdata->vif.addr))
1244                 return -EINVAL;
1245
1246         if (is_multicast_ether_addr(mac))
1247                 return -EINVAL;
1248
1249         sta = sta_info_alloc(sdata, mac, GFP_KERNEL);
1250         if (!sta)
1251                 return -ENOMEM;
1252
1253         /*
1254          * defaults -- if userspace wants something else we'll
1255          * change it accordingly in sta_apply_parameters()
1256          */
1257         if (!(params->sta_flags_set & BIT(NL80211_STA_FLAG_TDLS_PEER))) {
1258                 sta_info_pre_move_state(sta, IEEE80211_STA_AUTH);
1259                 sta_info_pre_move_state(sta, IEEE80211_STA_ASSOC);
1260         } else {
1261                 sta->sta.tdls = true;
1262         }
1263
1264         err = sta_apply_parameters(local, sta, params);
1265         if (err) {
1266                 sta_info_free(local, sta);
1267                 return err;
1268         }
1269
1270         /*
1271          * for TDLS, rate control should be initialized only when
1272          * rates are known and station is marked authorized
1273          */
1274         if (!test_sta_flag(sta, WLAN_STA_TDLS_PEER))
1275                 rate_control_rate_init(sta);
1276
1277         layer2_update = sdata->vif.type == NL80211_IFTYPE_AP_VLAN ||
1278                 sdata->vif.type == NL80211_IFTYPE_AP;
1279
1280         err = sta_info_insert_rcu(sta);
1281         if (err) {
1282                 rcu_read_unlock();
1283                 return err;
1284         }
1285
1286         if (layer2_update)
1287                 ieee80211_send_layer2_update(sta);
1288
1289         rcu_read_unlock();
1290
1291         return 0;
1292 }
1293
1294 static int ieee80211_del_station(struct wiphy *wiphy, struct net_device *dev,
1295                                  struct station_del_parameters *params)
1296 {
1297         struct ieee80211_sub_if_data *sdata;
1298
1299         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1300
1301         if (params->mac)
1302                 return sta_info_destroy_addr_bss(sdata, params->mac);
1303
1304         sta_info_flush(sdata);
1305         return 0;
1306 }
1307
1308 static int ieee80211_change_station(struct wiphy *wiphy,
1309                                     struct net_device *dev, const u8 *mac,
1310                                     struct station_parameters *params)
1311 {
1312         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1313         struct ieee80211_local *local = wiphy_priv(wiphy);
1314         struct sta_info *sta;
1315         struct ieee80211_sub_if_data *vlansdata;
1316         enum cfg80211_station_type statype;
1317         int err;
1318
1319         mutex_lock(&local->sta_mtx);
1320
1321         sta = sta_info_get_bss(sdata, mac);
1322         if (!sta) {
1323                 err = -ENOENT;
1324                 goto out_err;
1325         }
1326
1327         switch (sdata->vif.type) {
1328         case NL80211_IFTYPE_MESH_POINT:
1329                 if (sdata->u.mesh.user_mpm)
1330                         statype = CFG80211_STA_MESH_PEER_USER;
1331                 else
1332                         statype = CFG80211_STA_MESH_PEER_KERNEL;
1333                 break;
1334         case NL80211_IFTYPE_ADHOC:
1335                 statype = CFG80211_STA_IBSS;
1336                 break;
1337         case NL80211_IFTYPE_STATION:
1338                 if (!test_sta_flag(sta, WLAN_STA_TDLS_PEER)) {
1339                         statype = CFG80211_STA_AP_STA;
1340                         break;
1341                 }
1342                 if (test_sta_flag(sta, WLAN_STA_AUTHORIZED))
1343                         statype = CFG80211_STA_TDLS_PEER_ACTIVE;
1344                 else
1345                         statype = CFG80211_STA_TDLS_PEER_SETUP;
1346                 break;
1347         case NL80211_IFTYPE_AP:
1348         case NL80211_IFTYPE_AP_VLAN:
1349                 statype = CFG80211_STA_AP_CLIENT;
1350                 break;
1351         default:
1352                 err = -EOPNOTSUPP;
1353                 goto out_err;
1354         }
1355
1356         err = cfg80211_check_station_change(wiphy, params, statype);
1357         if (err)
1358                 goto out_err;
1359
1360         if (params->vlan && params->vlan != sta->sdata->dev) {
1361                 bool prev_4addr = false;
1362                 bool new_4addr = false;
1363
1364                 vlansdata = IEEE80211_DEV_TO_SUB_IF(params->vlan);
1365
1366                 if (params->vlan->ieee80211_ptr->use_4addr) {
1367                         if (vlansdata->u.vlan.sta) {
1368                                 err = -EBUSY;
1369                                 goto out_err;
1370                         }
1371
1372                         rcu_assign_pointer(vlansdata->u.vlan.sta, sta);
1373                         new_4addr = true;
1374                 }
1375
1376                 if (sta->sdata->vif.type == NL80211_IFTYPE_AP_VLAN &&
1377                     sta->sdata->u.vlan.sta) {
1378                         RCU_INIT_POINTER(sta->sdata->u.vlan.sta, NULL);
1379                         prev_4addr = true;
1380                 }
1381
1382                 sta->sdata = vlansdata;
1383                 ieee80211_check_fast_xmit(sta);
1384
1385                 if (sta->sta_state == IEEE80211_STA_AUTHORIZED &&
1386                     prev_4addr != new_4addr) {
1387                         if (new_4addr)
1388                                 atomic_dec(&sta->sdata->bss->num_mcast_sta);
1389                         else
1390                                 atomic_inc(&sta->sdata->bss->num_mcast_sta);
1391                 }
1392
1393                 ieee80211_send_layer2_update(sta);
1394         }
1395
1396         err = sta_apply_parameters(local, sta, params);
1397         if (err)
1398                 goto out_err;
1399
1400         mutex_unlock(&local->sta_mtx);
1401
1402         if ((sdata->vif.type == NL80211_IFTYPE_AP ||
1403              sdata->vif.type == NL80211_IFTYPE_AP_VLAN) &&
1404             sta->known_smps_mode != sta->sdata->bss->req_smps &&
1405             test_sta_flag(sta, WLAN_STA_AUTHORIZED) &&
1406             sta_info_tx_streams(sta) != 1) {
1407                 ht_dbg(sta->sdata,
1408                        "%pM just authorized and MIMO capable - update SMPS\n",
1409                        sta->sta.addr);
1410                 ieee80211_send_smps_action(sta->sdata,
1411                         sta->sdata->bss->req_smps,
1412                         sta->sta.addr,
1413                         sta->sdata->vif.bss_conf.bssid);
1414         }
1415
1416         if (sdata->vif.type == NL80211_IFTYPE_STATION &&
1417             params->sta_flags_mask & BIT(NL80211_STA_FLAG_AUTHORIZED)) {
1418                 ieee80211_recalc_ps(local, -1);
1419                 ieee80211_recalc_ps_vif(sdata);
1420         }
1421
1422         return 0;
1423 out_err:
1424         mutex_unlock(&local->sta_mtx);
1425         return err;
1426 }
1427
1428 #ifdef CONFIG_MAC80211_MESH
1429 static int ieee80211_add_mpath(struct wiphy *wiphy, struct net_device *dev,
1430                                const u8 *dst, const u8 *next_hop)
1431 {
1432         struct ieee80211_sub_if_data *sdata;
1433         struct mesh_path *mpath;
1434         struct sta_info *sta;
1435
1436         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1437
1438         rcu_read_lock();
1439         sta = sta_info_get(sdata, next_hop);
1440         if (!sta) {
1441                 rcu_read_unlock();
1442                 return -ENOENT;
1443         }
1444
1445         mpath = mesh_path_add(sdata, dst);
1446         if (IS_ERR(mpath)) {
1447                 rcu_read_unlock();
1448                 return PTR_ERR(mpath);
1449         }
1450
1451         mesh_path_fix_nexthop(mpath, sta);
1452
1453         rcu_read_unlock();
1454         return 0;
1455 }
1456
1457 static int ieee80211_del_mpath(struct wiphy *wiphy, struct net_device *dev,
1458                                const u8 *dst)
1459 {
1460         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1461
1462         if (dst)
1463                 return mesh_path_del(sdata, dst);
1464
1465         mesh_path_flush_by_iface(sdata);
1466         return 0;
1467 }
1468
1469 static int ieee80211_change_mpath(struct wiphy *wiphy, struct net_device *dev,
1470                                   const u8 *dst, const u8 *next_hop)
1471 {
1472         struct ieee80211_sub_if_data *sdata;
1473         struct mesh_path *mpath;
1474         struct sta_info *sta;
1475
1476         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1477
1478         rcu_read_lock();
1479
1480         sta = sta_info_get(sdata, next_hop);
1481         if (!sta) {
1482                 rcu_read_unlock();
1483                 return -ENOENT;
1484         }
1485
1486         mpath = mesh_path_lookup(sdata, dst);
1487         if (!mpath) {
1488                 rcu_read_unlock();
1489                 return -ENOENT;
1490         }
1491
1492         mesh_path_fix_nexthop(mpath, sta);
1493
1494         rcu_read_unlock();
1495         return 0;
1496 }
1497
1498 static void mpath_set_pinfo(struct mesh_path *mpath, u8 *next_hop,
1499                             struct mpath_info *pinfo)
1500 {
1501         struct sta_info *next_hop_sta = rcu_dereference(mpath->next_hop);
1502
1503         if (next_hop_sta)
1504                 memcpy(next_hop, next_hop_sta->sta.addr, ETH_ALEN);
1505         else
1506                 eth_zero_addr(next_hop);
1507
1508         memset(pinfo, 0, sizeof(*pinfo));
1509
1510         pinfo->generation = mesh_paths_generation;
1511
1512         pinfo->filled = MPATH_INFO_FRAME_QLEN |
1513                         MPATH_INFO_SN |
1514                         MPATH_INFO_METRIC |
1515                         MPATH_INFO_EXPTIME |
1516                         MPATH_INFO_DISCOVERY_TIMEOUT |
1517                         MPATH_INFO_DISCOVERY_RETRIES |
1518                         MPATH_INFO_FLAGS;
1519
1520         pinfo->frame_qlen = mpath->frame_queue.qlen;
1521         pinfo->sn = mpath->sn;
1522         pinfo->metric = mpath->metric;
1523         if (time_before(jiffies, mpath->exp_time))
1524                 pinfo->exptime = jiffies_to_msecs(mpath->exp_time - jiffies);
1525         pinfo->discovery_timeout =
1526                         jiffies_to_msecs(mpath->discovery_timeout);
1527         pinfo->discovery_retries = mpath->discovery_retries;
1528         if (mpath->flags & MESH_PATH_ACTIVE)
1529                 pinfo->flags |= NL80211_MPATH_FLAG_ACTIVE;
1530         if (mpath->flags & MESH_PATH_RESOLVING)
1531                 pinfo->flags |= NL80211_MPATH_FLAG_RESOLVING;
1532         if (mpath->flags & MESH_PATH_SN_VALID)
1533                 pinfo->flags |= NL80211_MPATH_FLAG_SN_VALID;
1534         if (mpath->flags & MESH_PATH_FIXED)
1535                 pinfo->flags |= NL80211_MPATH_FLAG_FIXED;
1536         if (mpath->flags & MESH_PATH_RESOLVED)
1537                 pinfo->flags |= NL80211_MPATH_FLAG_RESOLVED;
1538 }
1539
1540 static int ieee80211_get_mpath(struct wiphy *wiphy, struct net_device *dev,
1541                                u8 *dst, u8 *next_hop, struct mpath_info *pinfo)
1542
1543 {
1544         struct ieee80211_sub_if_data *sdata;
1545         struct mesh_path *mpath;
1546
1547         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1548
1549         rcu_read_lock();
1550         mpath = mesh_path_lookup(sdata, dst);
1551         if (!mpath) {
1552                 rcu_read_unlock();
1553                 return -ENOENT;
1554         }
1555         memcpy(dst, mpath->dst, ETH_ALEN);
1556         mpath_set_pinfo(mpath, next_hop, pinfo);
1557         rcu_read_unlock();
1558         return 0;
1559 }
1560
1561 static int ieee80211_dump_mpath(struct wiphy *wiphy, struct net_device *dev,
1562                                 int idx, u8 *dst, u8 *next_hop,
1563                                 struct mpath_info *pinfo)
1564 {
1565         struct ieee80211_sub_if_data *sdata;
1566         struct mesh_path *mpath;
1567
1568         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1569
1570         rcu_read_lock();
1571         mpath = mesh_path_lookup_by_idx(sdata, idx);
1572         if (!mpath) {
1573                 rcu_read_unlock();
1574                 return -ENOENT;
1575         }
1576         memcpy(dst, mpath->dst, ETH_ALEN);
1577         mpath_set_pinfo(mpath, next_hop, pinfo);
1578         rcu_read_unlock();
1579         return 0;
1580 }
1581
1582 static void mpp_set_pinfo(struct mesh_path *mpath, u8 *mpp,
1583                           struct mpath_info *pinfo)
1584 {
1585         memset(pinfo, 0, sizeof(*pinfo));
1586         memcpy(mpp, mpath->mpp, ETH_ALEN);
1587
1588         pinfo->generation = mpp_paths_generation;
1589 }
1590
1591 static int ieee80211_get_mpp(struct wiphy *wiphy, struct net_device *dev,
1592                              u8 *dst, u8 *mpp, struct mpath_info *pinfo)
1593
1594 {
1595         struct ieee80211_sub_if_data *sdata;
1596         struct mesh_path *mpath;
1597
1598         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1599
1600         rcu_read_lock();
1601         mpath = mpp_path_lookup(sdata, dst);
1602         if (!mpath) {
1603                 rcu_read_unlock();
1604                 return -ENOENT;
1605         }
1606         memcpy(dst, mpath->dst, ETH_ALEN);
1607         mpp_set_pinfo(mpath, mpp, pinfo);
1608         rcu_read_unlock();
1609         return 0;
1610 }
1611
1612 static int ieee80211_dump_mpp(struct wiphy *wiphy, struct net_device *dev,
1613                               int idx, u8 *dst, u8 *mpp,
1614                               struct mpath_info *pinfo)
1615 {
1616         struct ieee80211_sub_if_data *sdata;
1617         struct mesh_path *mpath;
1618
1619         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1620
1621         rcu_read_lock();
1622         mpath = mpp_path_lookup_by_idx(sdata, idx);
1623         if (!mpath) {
1624                 rcu_read_unlock();
1625                 return -ENOENT;
1626         }
1627         memcpy(dst, mpath->dst, ETH_ALEN);
1628         mpp_set_pinfo(mpath, mpp, pinfo);
1629         rcu_read_unlock();
1630         return 0;
1631 }
1632
1633 static int ieee80211_get_mesh_config(struct wiphy *wiphy,
1634                                 struct net_device *dev,
1635                                 struct mesh_config *conf)
1636 {
1637         struct ieee80211_sub_if_data *sdata;
1638         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1639
1640         memcpy(conf, &(sdata->u.mesh.mshcfg), sizeof(struct mesh_config));
1641         return 0;
1642 }
1643
1644 static inline bool _chg_mesh_attr(enum nl80211_meshconf_params parm, u32 mask)
1645 {
1646         return (mask >> (parm-1)) & 0x1;
1647 }
1648
1649 static int copy_mesh_setup(struct ieee80211_if_mesh *ifmsh,
1650                 const struct mesh_setup *setup)
1651 {
1652         u8 *new_ie;
1653         const u8 *old_ie;
1654         struct ieee80211_sub_if_data *sdata = container_of(ifmsh,
1655                                         struct ieee80211_sub_if_data, u.mesh);
1656
1657         /* allocate information elements */
1658         new_ie = NULL;
1659         old_ie = ifmsh->ie;
1660
1661         if (setup->ie_len) {
1662                 new_ie = kmemdup(setup->ie, setup->ie_len,
1663                                 GFP_KERNEL);
1664                 if (!new_ie)
1665                         return -ENOMEM;
1666         }
1667         ifmsh->ie_len = setup->ie_len;
1668         ifmsh->ie = new_ie;
1669         kfree(old_ie);
1670
1671         /* now copy the rest of the setup parameters */
1672         ifmsh->mesh_id_len = setup->mesh_id_len;
1673         memcpy(ifmsh->mesh_id, setup->mesh_id, ifmsh->mesh_id_len);
1674         ifmsh->mesh_sp_id = setup->sync_method;
1675         ifmsh->mesh_pp_id = setup->path_sel_proto;
1676         ifmsh->mesh_pm_id = setup->path_metric;
1677         ifmsh->user_mpm = setup->user_mpm;
1678         ifmsh->mesh_auth_id = setup->auth_id;
1679         ifmsh->security = IEEE80211_MESH_SEC_NONE;
1680         if (setup->is_authenticated)
1681                 ifmsh->security |= IEEE80211_MESH_SEC_AUTHED;
1682         if (setup->is_secure)
1683                 ifmsh->security |= IEEE80211_MESH_SEC_SECURED;
1684
1685         /* mcast rate setting in Mesh Node */
1686         memcpy(sdata->vif.bss_conf.mcast_rate, setup->mcast_rate,
1687                                                 sizeof(setup->mcast_rate));
1688         sdata->vif.bss_conf.basic_rates = setup->basic_rates;
1689
1690         sdata->vif.bss_conf.beacon_int = setup->beacon_interval;
1691         sdata->vif.bss_conf.dtim_period = setup->dtim_period;
1692
1693         return 0;
1694 }
1695
1696 static int ieee80211_update_mesh_config(struct wiphy *wiphy,
1697                                         struct net_device *dev, u32 mask,
1698                                         const struct mesh_config *nconf)
1699 {
1700         struct mesh_config *conf;
1701         struct ieee80211_sub_if_data *sdata;
1702         struct ieee80211_if_mesh *ifmsh;
1703
1704         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1705         ifmsh = &sdata->u.mesh;
1706
1707         /* Set the config options which we are interested in setting */
1708         conf = &(sdata->u.mesh.mshcfg);
1709         if (_chg_mesh_attr(NL80211_MESHCONF_RETRY_TIMEOUT, mask))
1710                 conf->dot11MeshRetryTimeout = nconf->dot11MeshRetryTimeout;
1711         if (_chg_mesh_attr(NL80211_MESHCONF_CONFIRM_TIMEOUT, mask))
1712                 conf->dot11MeshConfirmTimeout = nconf->dot11MeshConfirmTimeout;
1713         if (_chg_mesh_attr(NL80211_MESHCONF_HOLDING_TIMEOUT, mask))
1714                 conf->dot11MeshHoldingTimeout = nconf->dot11MeshHoldingTimeout;
1715         if (_chg_mesh_attr(NL80211_MESHCONF_MAX_PEER_LINKS, mask))
1716                 conf->dot11MeshMaxPeerLinks = nconf->dot11MeshMaxPeerLinks;
1717         if (_chg_mesh_attr(NL80211_MESHCONF_MAX_RETRIES, mask))
1718                 conf->dot11MeshMaxRetries = nconf->dot11MeshMaxRetries;
1719         if (_chg_mesh_attr(NL80211_MESHCONF_TTL, mask))
1720                 conf->dot11MeshTTL = nconf->dot11MeshTTL;
1721         if (_chg_mesh_attr(NL80211_MESHCONF_ELEMENT_TTL, mask))
1722                 conf->element_ttl = nconf->element_ttl;
1723         if (_chg_mesh_attr(NL80211_MESHCONF_AUTO_OPEN_PLINKS, mask)) {
1724                 if (ifmsh->user_mpm)
1725                         return -EBUSY;
1726                 conf->auto_open_plinks = nconf->auto_open_plinks;
1727         }
1728         if (_chg_mesh_attr(NL80211_MESHCONF_SYNC_OFFSET_MAX_NEIGHBOR, mask))
1729                 conf->dot11MeshNbrOffsetMaxNeighbor =
1730                         nconf->dot11MeshNbrOffsetMaxNeighbor;
1731         if (_chg_mesh_attr(NL80211_MESHCONF_HWMP_MAX_PREQ_RETRIES, mask))
1732                 conf->dot11MeshHWMPmaxPREQretries =
1733                         nconf->dot11MeshHWMPmaxPREQretries;
1734         if (_chg_mesh_attr(NL80211_MESHCONF_PATH_REFRESH_TIME, mask))
1735                 conf->path_refresh_time = nconf->path_refresh_time;
1736         if (_chg_mesh_attr(NL80211_MESHCONF_MIN_DISCOVERY_TIMEOUT, mask))
1737                 conf->min_discovery_timeout = nconf->min_discovery_timeout;
1738         if (_chg_mesh_attr(NL80211_MESHCONF_HWMP_ACTIVE_PATH_TIMEOUT, mask))
1739                 conf->dot11MeshHWMPactivePathTimeout =
1740                         nconf->dot11MeshHWMPactivePathTimeout;
1741         if (_chg_mesh_attr(NL80211_MESHCONF_HWMP_PREQ_MIN_INTERVAL, mask))
1742                 conf->dot11MeshHWMPpreqMinInterval =
1743                         nconf->dot11MeshHWMPpreqMinInterval;
1744         if (_chg_mesh_attr(NL80211_MESHCONF_HWMP_PERR_MIN_INTERVAL, mask))
1745                 conf->dot11MeshHWMPperrMinInterval =
1746                         nconf->dot11MeshHWMPperrMinInterval;
1747         if (_chg_mesh_attr(NL80211_MESHCONF_HWMP_NET_DIAM_TRVS_TIME,
1748                            mask))
1749                 conf->dot11MeshHWMPnetDiameterTraversalTime =
1750                         nconf->dot11MeshHWMPnetDiameterTraversalTime;
1751         if (_chg_mesh_attr(NL80211_MESHCONF_HWMP_ROOTMODE, mask)) {
1752                 conf->dot11MeshHWMPRootMode = nconf->dot11MeshHWMPRootMode;
1753                 ieee80211_mesh_root_setup(ifmsh);
1754         }
1755         if (_chg_mesh_attr(NL80211_MESHCONF_GATE_ANNOUNCEMENTS, mask)) {
1756                 /* our current gate announcement implementation rides on root
1757                  * announcements, so require this ifmsh to also be a root node
1758                  * */
1759                 if (nconf->dot11MeshGateAnnouncementProtocol &&
1760                     !(conf->dot11MeshHWMPRootMode > IEEE80211_ROOTMODE_ROOT)) {
1761                         conf->dot11MeshHWMPRootMode = IEEE80211_PROACTIVE_RANN;
1762                         ieee80211_mesh_root_setup(ifmsh);
1763                 }
1764                 conf->dot11MeshGateAnnouncementProtocol =
1765                         nconf->dot11MeshGateAnnouncementProtocol;
1766         }
1767         if (_chg_mesh_attr(NL80211_MESHCONF_HWMP_RANN_INTERVAL, mask))
1768                 conf->dot11MeshHWMPRannInterval =
1769                         nconf->dot11MeshHWMPRannInterval;
1770         if (_chg_mesh_attr(NL80211_MESHCONF_FORWARDING, mask))
1771                 conf->dot11MeshForwarding = nconf->dot11MeshForwarding;
1772         if (_chg_mesh_attr(NL80211_MESHCONF_RSSI_THRESHOLD, mask)) {
1773                 /* our RSSI threshold implementation is supported only for
1774                  * devices that report signal in dBm.
1775                  */
1776                 if (!ieee80211_hw_check(&sdata->local->hw, SIGNAL_DBM))
1777                         return -ENOTSUPP;
1778                 conf->rssi_threshold = nconf->rssi_threshold;
1779         }
1780         if (_chg_mesh_attr(NL80211_MESHCONF_HT_OPMODE, mask)) {
1781                 conf->ht_opmode = nconf->ht_opmode;
1782                 sdata->vif.bss_conf.ht_operation_mode = nconf->ht_opmode;
1783                 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_HT);
1784         }
1785         if (_chg_mesh_attr(NL80211_MESHCONF_HWMP_PATH_TO_ROOT_TIMEOUT, mask))
1786                 conf->dot11MeshHWMPactivePathToRootTimeout =
1787                         nconf->dot11MeshHWMPactivePathToRootTimeout;
1788         if (_chg_mesh_attr(NL80211_MESHCONF_HWMP_ROOT_INTERVAL, mask))
1789                 conf->dot11MeshHWMProotInterval =
1790                         nconf->dot11MeshHWMProotInterval;
1791         if (_chg_mesh_attr(NL80211_MESHCONF_HWMP_CONFIRMATION_INTERVAL, mask))
1792                 conf->dot11MeshHWMPconfirmationInterval =
1793                         nconf->dot11MeshHWMPconfirmationInterval;
1794         if (_chg_mesh_attr(NL80211_MESHCONF_POWER_MODE, mask)) {
1795                 conf->power_mode = nconf->power_mode;
1796                 ieee80211_mps_local_status_update(sdata);
1797         }
1798         if (_chg_mesh_attr(NL80211_MESHCONF_AWAKE_WINDOW, mask))
1799                 conf->dot11MeshAwakeWindowDuration =
1800                         nconf->dot11MeshAwakeWindowDuration;
1801         if (_chg_mesh_attr(NL80211_MESHCONF_PLINK_TIMEOUT, mask))
1802                 conf->plink_timeout = nconf->plink_timeout;
1803         ieee80211_mbss_info_change_notify(sdata, BSS_CHANGED_BEACON);
1804         return 0;
1805 }
1806
1807 static int ieee80211_join_mesh(struct wiphy *wiphy, struct net_device *dev,
1808                                const struct mesh_config *conf,
1809                                const struct mesh_setup *setup)
1810 {
1811         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1812         struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
1813         int err;
1814
1815         memcpy(&ifmsh->mshcfg, conf, sizeof(struct mesh_config));
1816         err = copy_mesh_setup(ifmsh, setup);
1817         if (err)
1818                 return err;
1819
1820         /* can mesh use other SMPS modes? */
1821         sdata->smps_mode = IEEE80211_SMPS_OFF;
1822         sdata->needed_rx_chains = sdata->local->rx_chains;
1823
1824         mutex_lock(&sdata->local->mtx);
1825         err = ieee80211_vif_use_channel(sdata, &setup->chandef,
1826                                         IEEE80211_CHANCTX_SHARED);
1827         mutex_unlock(&sdata->local->mtx);
1828         if (err)
1829                 return err;
1830
1831         return ieee80211_start_mesh(sdata);
1832 }
1833
1834 static int ieee80211_leave_mesh(struct wiphy *wiphy, struct net_device *dev)
1835 {
1836         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1837
1838         ieee80211_stop_mesh(sdata);
1839         mutex_lock(&sdata->local->mtx);
1840         ieee80211_vif_release_channel(sdata);
1841         mutex_unlock(&sdata->local->mtx);
1842
1843         return 0;
1844 }
1845 #endif
1846
1847 static int ieee80211_change_bss(struct wiphy *wiphy,
1848                                 struct net_device *dev,
1849                                 struct bss_parameters *params)
1850 {
1851         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1852         enum ieee80211_band band;
1853         u32 changed = 0;
1854
1855         if (!sdata_dereference(sdata->u.ap.beacon, sdata))
1856                 return -ENOENT;
1857
1858         band = ieee80211_get_sdata_band(sdata);
1859
1860         if (params->use_cts_prot >= 0) {
1861                 sdata->vif.bss_conf.use_cts_prot = params->use_cts_prot;
1862                 changed |= BSS_CHANGED_ERP_CTS_PROT;
1863         }
1864         if (params->use_short_preamble >= 0) {
1865                 sdata->vif.bss_conf.use_short_preamble =
1866                         params->use_short_preamble;
1867                 changed |= BSS_CHANGED_ERP_PREAMBLE;
1868         }
1869
1870         if (!sdata->vif.bss_conf.use_short_slot &&
1871             band == IEEE80211_BAND_5GHZ) {
1872                 sdata->vif.bss_conf.use_short_slot = true;
1873                 changed |= BSS_CHANGED_ERP_SLOT;
1874         }
1875
1876         if (params->use_short_slot_time >= 0) {
1877                 sdata->vif.bss_conf.use_short_slot =
1878                         params->use_short_slot_time;
1879                 changed |= BSS_CHANGED_ERP_SLOT;
1880         }
1881
1882         if (params->basic_rates) {
1883                 ieee80211_parse_bitrates(&sdata->vif.bss_conf.chandef,
1884                                          wiphy->bands[band],
1885                                          params->basic_rates,
1886                                          params->basic_rates_len,
1887                                          &sdata->vif.bss_conf.basic_rates);
1888                 changed |= BSS_CHANGED_BASIC_RATES;
1889         }
1890
1891         if (params->ap_isolate >= 0) {
1892                 if (params->ap_isolate)
1893                         sdata->flags |= IEEE80211_SDATA_DONT_BRIDGE_PACKETS;
1894                 else
1895                         sdata->flags &= ~IEEE80211_SDATA_DONT_BRIDGE_PACKETS;
1896         }
1897
1898         if (params->ht_opmode >= 0) {
1899                 sdata->vif.bss_conf.ht_operation_mode =
1900                         (u16) params->ht_opmode;
1901                 changed |= BSS_CHANGED_HT;
1902         }
1903
1904         if (params->p2p_ctwindow >= 0) {
1905                 sdata->vif.bss_conf.p2p_noa_attr.oppps_ctwindow &=
1906                                         ~IEEE80211_P2P_OPPPS_CTWINDOW_MASK;
1907                 sdata->vif.bss_conf.p2p_noa_attr.oppps_ctwindow |=
1908                         params->p2p_ctwindow & IEEE80211_P2P_OPPPS_CTWINDOW_MASK;
1909                 changed |= BSS_CHANGED_P2P_PS;
1910         }
1911
1912         if (params->p2p_opp_ps > 0) {
1913                 sdata->vif.bss_conf.p2p_noa_attr.oppps_ctwindow |=
1914                                         IEEE80211_P2P_OPPPS_ENABLE_BIT;
1915                 changed |= BSS_CHANGED_P2P_PS;
1916         } else if (params->p2p_opp_ps == 0) {
1917                 sdata->vif.bss_conf.p2p_noa_attr.oppps_ctwindow &=
1918                                         ~IEEE80211_P2P_OPPPS_ENABLE_BIT;
1919                 changed |= BSS_CHANGED_P2P_PS;
1920         }
1921
1922         ieee80211_bss_info_change_notify(sdata, changed);
1923
1924         return 0;
1925 }
1926
1927 static int ieee80211_set_txq_params(struct wiphy *wiphy,
1928                                     struct net_device *dev,
1929                                     struct ieee80211_txq_params *params)
1930 {
1931         struct ieee80211_local *local = wiphy_priv(wiphy);
1932         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1933         struct ieee80211_tx_queue_params p;
1934
1935         if (!local->ops->conf_tx)
1936                 return -EOPNOTSUPP;
1937
1938         if (local->hw.queues < IEEE80211_NUM_ACS)
1939                 return -EOPNOTSUPP;
1940
1941         memset(&p, 0, sizeof(p));
1942         p.aifs = params->aifs;
1943         p.cw_max = params->cwmax;
1944         p.cw_min = params->cwmin;
1945         p.txop = params->txop;
1946
1947         /*
1948          * Setting tx queue params disables u-apsd because it's only
1949          * called in master mode.
1950          */
1951         p.uapsd = false;
1952
1953         sdata->tx_conf[params->ac] = p;
1954         if (drv_conf_tx(local, sdata, params->ac, &p)) {
1955                 wiphy_debug(local->hw.wiphy,
1956                             "failed to set TX queue parameters for AC %d\n",
1957                             params->ac);
1958                 return -EINVAL;
1959         }
1960
1961         ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_QOS);
1962
1963         return 0;
1964 }
1965
1966 #ifdef CONFIG_PM
1967 static int ieee80211_suspend(struct wiphy *wiphy,
1968                              struct cfg80211_wowlan *wowlan)
1969 {
1970         return __ieee80211_suspend(wiphy_priv(wiphy), wowlan);
1971 }
1972
1973 static int ieee80211_resume(struct wiphy *wiphy)
1974 {
1975         return __ieee80211_resume(wiphy_priv(wiphy));
1976 }
1977 #else
1978 #define ieee80211_suspend NULL
1979 #define ieee80211_resume NULL
1980 #endif
1981
1982 static int ieee80211_scan(struct wiphy *wiphy,
1983                           struct cfg80211_scan_request *req)
1984 {
1985         struct ieee80211_sub_if_data *sdata;
1986
1987         sdata = IEEE80211_WDEV_TO_SUB_IF(req->wdev);
1988
1989         switch (ieee80211_vif_type_p2p(&sdata->vif)) {
1990         case NL80211_IFTYPE_STATION:
1991         case NL80211_IFTYPE_ADHOC:
1992         case NL80211_IFTYPE_MESH_POINT:
1993         case NL80211_IFTYPE_P2P_CLIENT:
1994         case NL80211_IFTYPE_P2P_DEVICE:
1995                 break;
1996         case NL80211_IFTYPE_P2P_GO:
1997                 if (sdata->local->ops->hw_scan)
1998                         break;
1999                 /*
2000                  * FIXME: implement NoA while scanning in software,
2001                  * for now fall through to allow scanning only when
2002                  * beaconing hasn't been configured yet
2003                  */
2004         case NL80211_IFTYPE_AP:
2005                 /*
2006                  * If the scan has been forced (and the driver supports
2007                  * forcing), don't care about being beaconing already.
2008                  * This will create problems to the attached stations (e.g. all
2009                  * the  frames sent while scanning on other channel will be
2010                  * lost)
2011                  */
2012                 if (sdata->u.ap.beacon &&
2013                     (!(wiphy->features & NL80211_FEATURE_AP_SCAN) ||
2014                      !(req->flags & NL80211_SCAN_FLAG_AP)))
2015                         return -EOPNOTSUPP;
2016                 break;
2017         default:
2018                 return -EOPNOTSUPP;
2019         }
2020
2021         return ieee80211_request_scan(sdata, req);
2022 }
2023
2024 static int
2025 ieee80211_sched_scan_start(struct wiphy *wiphy,
2026                            struct net_device *dev,
2027                            struct cfg80211_sched_scan_request *req)
2028 {
2029         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2030
2031         if (!sdata->local->ops->sched_scan_start)
2032                 return -EOPNOTSUPP;
2033
2034         return ieee80211_request_sched_scan_start(sdata, req);
2035 }
2036
2037 static int
2038 ieee80211_sched_scan_stop(struct wiphy *wiphy, struct net_device *dev)
2039 {
2040         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2041
2042         if (!sdata->local->ops->sched_scan_stop)
2043                 return -EOPNOTSUPP;
2044
2045         return ieee80211_request_sched_scan_stop(sdata);
2046 }
2047
2048 static int ieee80211_auth(struct wiphy *wiphy, struct net_device *dev,
2049                           struct cfg80211_auth_request *req)
2050 {
2051         return ieee80211_mgd_auth(IEEE80211_DEV_TO_SUB_IF(dev), req);
2052 }
2053
2054 static int ieee80211_assoc(struct wiphy *wiphy, struct net_device *dev,
2055                            struct cfg80211_assoc_request *req)
2056 {
2057         return ieee80211_mgd_assoc(IEEE80211_DEV_TO_SUB_IF(dev), req);
2058 }
2059
2060 static int ieee80211_deauth(struct wiphy *wiphy, struct net_device *dev,
2061                             struct cfg80211_deauth_request *req)
2062 {
2063         return ieee80211_mgd_deauth(IEEE80211_DEV_TO_SUB_IF(dev), req);
2064 }
2065
2066 static int ieee80211_disassoc(struct wiphy *wiphy, struct net_device *dev,
2067                               struct cfg80211_disassoc_request *req)
2068 {
2069         return ieee80211_mgd_disassoc(IEEE80211_DEV_TO_SUB_IF(dev), req);
2070 }
2071
2072 static int ieee80211_join_ibss(struct wiphy *wiphy, struct net_device *dev,
2073                                struct cfg80211_ibss_params *params)
2074 {
2075         return ieee80211_ibss_join(IEEE80211_DEV_TO_SUB_IF(dev), params);
2076 }
2077
2078 static int ieee80211_leave_ibss(struct wiphy *wiphy, struct net_device *dev)
2079 {
2080         return ieee80211_ibss_leave(IEEE80211_DEV_TO_SUB_IF(dev));
2081 }
2082
2083 static int ieee80211_join_ocb(struct wiphy *wiphy, struct net_device *dev,
2084                               struct ocb_setup *setup)
2085 {
2086         return ieee80211_ocb_join(IEEE80211_DEV_TO_SUB_IF(dev), setup);
2087 }
2088
2089 static int ieee80211_leave_ocb(struct wiphy *wiphy, struct net_device *dev)
2090 {
2091         return ieee80211_ocb_leave(IEEE80211_DEV_TO_SUB_IF(dev));
2092 }
2093
2094 static int ieee80211_set_mcast_rate(struct wiphy *wiphy, struct net_device *dev,
2095                                     int rate[IEEE80211_NUM_BANDS])
2096 {
2097         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2098
2099         memcpy(sdata->vif.bss_conf.mcast_rate, rate,
2100                sizeof(int) * IEEE80211_NUM_BANDS);
2101
2102         return 0;
2103 }
2104
2105 static int ieee80211_set_wiphy_params(struct wiphy *wiphy, u32 changed)
2106 {
2107         struct ieee80211_local *local = wiphy_priv(wiphy);
2108         int err;
2109
2110         if (changed & WIPHY_PARAM_FRAG_THRESHOLD) {
2111                 ieee80211_check_fast_xmit_all(local);
2112
2113                 err = drv_set_frag_threshold(local, wiphy->frag_threshold);
2114
2115                 if (err) {
2116                         ieee80211_check_fast_xmit_all(local);
2117                         return err;
2118                 }
2119         }
2120
2121         if ((changed & WIPHY_PARAM_COVERAGE_CLASS) ||
2122             (changed & WIPHY_PARAM_DYN_ACK)) {
2123                 s16 coverage_class;
2124
2125                 coverage_class = changed & WIPHY_PARAM_COVERAGE_CLASS ?
2126                                         wiphy->coverage_class : -1;
2127                 err = drv_set_coverage_class(local, coverage_class);
2128
2129                 if (err)
2130                         return err;
2131         }
2132
2133         if (changed & WIPHY_PARAM_RTS_THRESHOLD) {
2134                 err = drv_set_rts_threshold(local, wiphy->rts_threshold);
2135
2136                 if (err)
2137                         return err;
2138         }
2139
2140         if (changed & WIPHY_PARAM_RETRY_SHORT) {
2141                 if (wiphy->retry_short > IEEE80211_MAX_TX_RETRY)
2142                         return -EINVAL;
2143                 local->hw.conf.short_frame_max_tx_count = wiphy->retry_short;
2144         }
2145         if (changed & WIPHY_PARAM_RETRY_LONG) {
2146                 if (wiphy->retry_long > IEEE80211_MAX_TX_RETRY)
2147                         return -EINVAL;
2148                 local->hw.conf.long_frame_max_tx_count = wiphy->retry_long;
2149         }
2150         if (changed &
2151             (WIPHY_PARAM_RETRY_SHORT | WIPHY_PARAM_RETRY_LONG))
2152                 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_RETRY_LIMITS);
2153
2154         return 0;
2155 }
2156
2157 static int ieee80211_set_tx_power(struct wiphy *wiphy,
2158                                   struct wireless_dev *wdev,
2159                                   enum nl80211_tx_power_setting type, int mbm)
2160 {
2161         struct ieee80211_local *local = wiphy_priv(wiphy);
2162         struct ieee80211_sub_if_data *sdata;
2163         enum nl80211_tx_power_setting txp_type = type;
2164         bool update_txp_type = false;
2165
2166         if (wdev) {
2167                 sdata = IEEE80211_WDEV_TO_SUB_IF(wdev);
2168
2169                 switch (type) {
2170                 case NL80211_TX_POWER_AUTOMATIC:
2171                         sdata->user_power_level = IEEE80211_UNSET_POWER_LEVEL;
2172                         txp_type = NL80211_TX_POWER_LIMITED;
2173                         break;
2174                 case NL80211_TX_POWER_LIMITED:
2175                 case NL80211_TX_POWER_FIXED:
2176                         if (mbm < 0 || (mbm % 100))
2177                                 return -EOPNOTSUPP;
2178                         sdata->user_power_level = MBM_TO_DBM(mbm);
2179                         break;
2180                 }
2181
2182                 if (txp_type != sdata->vif.bss_conf.txpower_type) {
2183                         update_txp_type = true;
2184                         sdata->vif.bss_conf.txpower_type = txp_type;
2185                 }
2186
2187                 ieee80211_recalc_txpower(sdata, update_txp_type);
2188
2189                 return 0;
2190         }
2191
2192         switch (type) {
2193         case NL80211_TX_POWER_AUTOMATIC:
2194                 local->user_power_level = IEEE80211_UNSET_POWER_LEVEL;
2195                 txp_type = NL80211_TX_POWER_LIMITED;
2196                 break;
2197         case NL80211_TX_POWER_LIMITED:
2198         case NL80211_TX_POWER_FIXED:
2199                 if (mbm < 0 || (mbm % 100))
2200                         return -EOPNOTSUPP;
2201                 local->user_power_level = MBM_TO_DBM(mbm);
2202                 break;
2203         }
2204
2205         mutex_lock(&local->iflist_mtx);
2206         list_for_each_entry(sdata, &local->interfaces, list) {
2207                 sdata->user_power_level = local->user_power_level;
2208                 if (txp_type != sdata->vif.bss_conf.txpower_type)
2209                         update_txp_type = true;
2210                 sdata->vif.bss_conf.txpower_type = txp_type;
2211         }
2212         list_for_each_entry(sdata, &local->interfaces, list)
2213                 ieee80211_recalc_txpower(sdata, update_txp_type);
2214         mutex_unlock(&local->iflist_mtx);
2215
2216         return 0;
2217 }
2218
2219 static int ieee80211_get_tx_power(struct wiphy *wiphy,
2220                                   struct wireless_dev *wdev,
2221                                   int *dbm)
2222 {
2223         struct ieee80211_local *local = wiphy_priv(wiphy);
2224         struct ieee80211_sub_if_data *sdata = IEEE80211_WDEV_TO_SUB_IF(wdev);
2225
2226         if (local->ops->get_txpower)
2227                 return drv_get_txpower(local, sdata, dbm);
2228
2229         if (!local->use_chanctx)
2230                 *dbm = local->hw.conf.power_level;
2231         else
2232                 *dbm = sdata->vif.bss_conf.txpower;
2233
2234         return 0;
2235 }
2236
2237 static int ieee80211_set_wds_peer(struct wiphy *wiphy, struct net_device *dev,
2238                                   const u8 *addr)
2239 {
2240         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2241
2242         memcpy(&sdata->u.wds.remote_addr, addr, ETH_ALEN);
2243
2244         return 0;
2245 }
2246
2247 static void ieee80211_rfkill_poll(struct wiphy *wiphy)
2248 {
2249         struct ieee80211_local *local = wiphy_priv(wiphy);
2250
2251         drv_rfkill_poll(local);
2252 }
2253
2254 #ifdef CONFIG_NL80211_TESTMODE
2255 static int ieee80211_testmode_cmd(struct wiphy *wiphy,
2256                                   struct wireless_dev *wdev,
2257                                   void *data, int len)
2258 {
2259         struct ieee80211_local *local = wiphy_priv(wiphy);
2260         struct ieee80211_vif *vif = NULL;
2261
2262         if (!local->ops->testmode_cmd)
2263                 return -EOPNOTSUPP;
2264
2265         if (wdev) {
2266                 struct ieee80211_sub_if_data *sdata;
2267
2268                 sdata = IEEE80211_WDEV_TO_SUB_IF(wdev);
2269                 if (sdata->flags & IEEE80211_SDATA_IN_DRIVER)
2270                         vif = &sdata->vif;
2271         }
2272
2273         return local->ops->testmode_cmd(&local->hw, vif, data, len);
2274 }
2275
2276 static int ieee80211_testmode_dump(struct wiphy *wiphy,
2277                                    struct sk_buff *skb,
2278                                    struct netlink_callback *cb,
2279                                    void *data, int len)
2280 {
2281         struct ieee80211_local *local = wiphy_priv(wiphy);
2282
2283         if (!local->ops->testmode_dump)
2284                 return -EOPNOTSUPP;
2285
2286         return local->ops->testmode_dump(&local->hw, skb, cb, data, len);
2287 }
2288 #endif
2289
2290 int __ieee80211_request_smps_ap(struct ieee80211_sub_if_data *sdata,
2291                                 enum ieee80211_smps_mode smps_mode)
2292 {
2293         struct sta_info *sta;
2294         enum ieee80211_smps_mode old_req;
2295
2296         if (WARN_ON_ONCE(sdata->vif.type != NL80211_IFTYPE_AP))
2297                 return -EINVAL;
2298
2299         if (sdata->vif.bss_conf.chandef.width == NL80211_CHAN_WIDTH_20_NOHT)
2300                 return 0;
2301
2302         old_req = sdata->u.ap.req_smps;
2303         sdata->u.ap.req_smps = smps_mode;
2304
2305         /* AUTOMATIC doesn't mean much for AP - don't allow it */
2306         if (old_req == smps_mode ||
2307             smps_mode == IEEE80211_SMPS_AUTOMATIC)
2308                 return 0;
2309
2310          /* If no associated stations, there's no need to do anything */
2311         if (!atomic_read(&sdata->u.ap.num_mcast_sta)) {
2312                 sdata->smps_mode = smps_mode;
2313                 ieee80211_queue_work(&sdata->local->hw, &sdata->recalc_smps);
2314                 return 0;
2315         }
2316
2317         ht_dbg(sdata,
2318                "SMPS %d requested in AP mode, sending Action frame to %d stations\n",
2319                smps_mode, atomic_read(&sdata->u.ap.num_mcast_sta));
2320
2321         mutex_lock(&sdata->local->sta_mtx);
2322         list_for_each_entry(sta, &sdata->local->sta_list, list) {
2323                 /*
2324                  * Only stations associated to our AP and
2325                  * associated VLANs
2326                  */
2327                 if (sta->sdata->bss != &sdata->u.ap)
2328                         continue;
2329
2330                 /* This station doesn't support MIMO - skip it */
2331                 if (sta_info_tx_streams(sta) == 1)
2332                         continue;
2333
2334                 /*
2335                  * Don't wake up a STA just to send the action frame
2336                  * unless we are getting more restrictive.
2337                  */
2338                 if (test_sta_flag(sta, WLAN_STA_PS_STA) &&
2339                     !ieee80211_smps_is_restrictive(sta->known_smps_mode,
2340                                                    smps_mode)) {
2341                         ht_dbg(sdata, "Won't send SMPS to sleeping STA %pM\n",
2342                                sta->sta.addr);
2343                         continue;
2344                 }
2345
2346                 /*
2347                  * If the STA is not authorized, wait until it gets
2348                  * authorized and the action frame will be sent then.
2349                  */
2350                 if (!test_sta_flag(sta, WLAN_STA_AUTHORIZED))
2351                         continue;
2352
2353                 ht_dbg(sdata, "Sending SMPS to %pM\n", sta->sta.addr);
2354                 ieee80211_send_smps_action(sdata, smps_mode, sta->sta.addr,
2355                                            sdata->vif.bss_conf.bssid);
2356         }
2357         mutex_unlock(&sdata->local->sta_mtx);
2358
2359         sdata->smps_mode = smps_mode;
2360         ieee80211_queue_work(&sdata->local->hw, &sdata->recalc_smps);
2361
2362         return 0;
2363 }
2364
2365 int __ieee80211_request_smps_mgd(struct ieee80211_sub_if_data *sdata,
2366                                  enum ieee80211_smps_mode smps_mode)
2367 {
2368         const u8 *ap;
2369         enum ieee80211_smps_mode old_req;
2370         int err;
2371
2372         lockdep_assert_held(&sdata->wdev.mtx);
2373
2374         if (WARN_ON_ONCE(sdata->vif.type != NL80211_IFTYPE_STATION))
2375                 return -EINVAL;
2376
2377         old_req = sdata->u.mgd.req_smps;
2378         sdata->u.mgd.req_smps = smps_mode;
2379
2380         if (old_req == smps_mode &&
2381             smps_mode != IEEE80211_SMPS_AUTOMATIC)
2382                 return 0;
2383
2384         /*
2385          * If not associated, or current association is not an HT
2386          * association, there's no need to do anything, just store
2387          * the new value until we associate.
2388          */
2389         if (!sdata->u.mgd.associated ||
2390             sdata->vif.bss_conf.chandef.width == NL80211_CHAN_WIDTH_20_NOHT)
2391                 return 0;
2392
2393         ap = sdata->u.mgd.associated->bssid;
2394
2395         if (smps_mode == IEEE80211_SMPS_AUTOMATIC) {
2396                 if (sdata->u.mgd.powersave)
2397                         smps_mode = IEEE80211_SMPS_DYNAMIC;
2398                 else
2399                         smps_mode = IEEE80211_SMPS_OFF;
2400         }
2401
2402         /* send SM PS frame to AP */
2403         err = ieee80211_send_smps_action(sdata, smps_mode,
2404                                          ap, ap);
2405         if (err)
2406                 sdata->u.mgd.req_smps = old_req;
2407
2408         return err;
2409 }
2410
2411 static int ieee80211_set_power_mgmt(struct wiphy *wiphy, struct net_device *dev,
2412                                     bool enabled, int timeout)
2413 {
2414         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2415         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2416
2417         if (sdata->vif.type != NL80211_IFTYPE_STATION)
2418                 return -EOPNOTSUPP;
2419
2420         if (!ieee80211_hw_check(&local->hw, SUPPORTS_PS))
2421                 return -EOPNOTSUPP;
2422
2423         if (enabled == sdata->u.mgd.powersave &&
2424             timeout == local->dynamic_ps_forced_timeout)
2425                 return 0;
2426
2427         sdata->u.mgd.powersave = enabled;
2428         local->dynamic_ps_forced_timeout = timeout;
2429
2430         /* no change, but if automatic follow powersave */
2431         sdata_lock(sdata);
2432         __ieee80211_request_smps_mgd(sdata, sdata->u.mgd.req_smps);
2433         sdata_unlock(sdata);
2434
2435         if (ieee80211_hw_check(&local->hw, SUPPORTS_DYNAMIC_PS))
2436                 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
2437
2438         ieee80211_recalc_ps(local, -1);
2439         ieee80211_recalc_ps_vif(sdata);
2440
2441         return 0;
2442 }
2443
2444 static int ieee80211_set_cqm_rssi_config(struct wiphy *wiphy,
2445                                          struct net_device *dev,
2446                                          s32 rssi_thold, u32 rssi_hyst)
2447 {
2448         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2449         struct ieee80211_vif *vif = &sdata->vif;
2450         struct ieee80211_bss_conf *bss_conf = &vif->bss_conf;
2451
2452         if (rssi_thold == bss_conf->cqm_rssi_thold &&
2453             rssi_hyst == bss_conf->cqm_rssi_hyst)
2454                 return 0;
2455
2456         bss_conf->cqm_rssi_thold = rssi_thold;
2457         bss_conf->cqm_rssi_hyst = rssi_hyst;
2458
2459         /* tell the driver upon association, unless already associated */
2460         if (sdata->u.mgd.associated &&
2461             sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI)
2462                 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_CQM);
2463
2464         return 0;
2465 }
2466
2467 static int ieee80211_set_bitrate_mask(struct wiphy *wiphy,
2468                                       struct net_device *dev,
2469                                       const u8 *addr,
2470                                       const struct cfg80211_bitrate_mask *mask)
2471 {
2472         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2473         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2474         int i, ret;
2475
2476         if (!ieee80211_sdata_running(sdata))
2477                 return -ENETDOWN;
2478
2479         if (ieee80211_hw_check(&local->hw, HAS_RATE_CONTROL)) {
2480                 ret = drv_set_bitrate_mask(local, sdata, mask);
2481                 if (ret)
2482                         return ret;
2483         }
2484
2485         for (i = 0; i < IEEE80211_NUM_BANDS; i++) {
2486                 struct ieee80211_supported_band *sband = wiphy->bands[i];
2487                 int j;
2488
2489                 sdata->rc_rateidx_mask[i] = mask->control[i].legacy;
2490                 memcpy(sdata->rc_rateidx_mcs_mask[i], mask->control[i].ht_mcs,
2491                        sizeof(mask->control[i].ht_mcs));
2492
2493                 sdata->rc_has_mcs_mask[i] = false;
2494                 if (!sband)
2495                         continue;
2496
2497                 for (j = 0; j < IEEE80211_HT_MCS_MASK_LEN; j++)
2498                         if (~sdata->rc_rateidx_mcs_mask[i][j]) {
2499                                 sdata->rc_has_mcs_mask[i] = true;
2500                                 break;
2501                         }
2502         }
2503
2504         return 0;
2505 }
2506
2507 static bool ieee80211_coalesce_started_roc(struct ieee80211_local *local,
2508                                            struct ieee80211_roc_work *new_roc,
2509                                            struct ieee80211_roc_work *cur_roc)
2510 {
2511         unsigned long now = jiffies;
2512         unsigned long remaining = cur_roc->hw_start_time +
2513                                   msecs_to_jiffies(cur_roc->duration) -
2514                                   now;
2515
2516         if (WARN_ON(!cur_roc->started || !cur_roc->hw_begun))
2517                 return false;
2518
2519         /* if it doesn't fit entirely, schedule a new one */
2520         if (new_roc->duration > jiffies_to_msecs(remaining))
2521                 return false;
2522
2523         ieee80211_handle_roc_started(new_roc);
2524
2525         /* add to dependents so we send the expired event properly */
2526         list_add_tail(&new_roc->list, &cur_roc->dependents);
2527         return true;
2528 }
2529
2530 static u64 ieee80211_mgmt_tx_cookie(struct ieee80211_local *local)
2531 {
2532         lockdep_assert_held(&local->mtx);
2533
2534         local->roc_cookie_counter++;
2535
2536         /* wow, you wrapped 64 bits ... more likely a bug */
2537         if (WARN_ON(local->roc_cookie_counter == 0))
2538                 local->roc_cookie_counter++;
2539
2540         return local->roc_cookie_counter;
2541 }
2542
2543 static int ieee80211_start_roc_work(struct ieee80211_local *local,
2544                                     struct ieee80211_sub_if_data *sdata,
2545                                     struct ieee80211_channel *channel,
2546                                     unsigned int duration, u64 *cookie,
2547                                     struct sk_buff *txskb,
2548                                     enum ieee80211_roc_type type)
2549 {
2550         struct ieee80211_roc_work *roc, *tmp;
2551         bool queued = false;
2552         int ret;
2553
2554         lockdep_assert_held(&local->mtx);
2555
2556         if (local->use_chanctx && !local->ops->remain_on_channel)
2557                 return -EOPNOTSUPP;
2558
2559         roc = kzalloc(sizeof(*roc), GFP_KERNEL);
2560         if (!roc)
2561                 return -ENOMEM;
2562
2563         /*
2564          * If the duration is zero, then the driver
2565          * wouldn't actually do anything. Set it to
2566          * 10 for now.
2567          *
2568          * TODO: cancel the off-channel operation
2569          *       when we get the SKB's TX status and
2570          *       the wait time was zero before.
2571          */
2572         if (!duration)
2573                 duration = 10;
2574
2575         roc->chan = channel;
2576         roc->duration = duration;
2577         roc->req_duration = duration;
2578         roc->frame = txskb;
2579         roc->type = type;
2580         roc->sdata = sdata;
2581         INIT_DELAYED_WORK(&roc->work, ieee80211_sw_roc_work);
2582         INIT_LIST_HEAD(&roc->dependents);
2583
2584         /*
2585          * cookie is either the roc cookie (for normal roc)
2586          * or the SKB (for mgmt TX)
2587          */
2588         if (!txskb) {
2589                 roc->cookie = ieee80211_mgmt_tx_cookie(local);
2590                 *cookie = roc->cookie;
2591         } else {
2592                 roc->mgmt_tx_cookie = *cookie;
2593         }
2594
2595         /* if there's one pending or we're scanning, queue this one */
2596         if (!list_empty(&local->roc_list) ||
2597             local->scanning || ieee80211_is_radar_required(local))
2598                 goto out_check_combine;
2599
2600         /* if not HW assist, just queue & schedule work */
2601         if (!local->ops->remain_on_channel) {
2602                 ieee80211_queue_delayed_work(&local->hw, &roc->work, 0);
2603                 goto out_queue;
2604         }
2605
2606         /* otherwise actually kick it off here (for error handling) */
2607
2608         ret = drv_remain_on_channel(local, sdata, channel, duration, type);
2609         if (ret) {
2610                 kfree(roc);
2611                 return ret;
2612         }
2613
2614         roc->started = true;
2615         goto out_queue;
2616
2617  out_check_combine:
2618         list_for_each_entry(tmp, &local->roc_list, list) {
2619                 if (tmp->chan != channel || tmp->sdata != sdata)
2620                         continue;
2621
2622                 /*
2623                  * Extend this ROC if possible:
2624                  *
2625                  * If it hasn't started yet, just increase the duration
2626                  * and add the new one to the list of dependents.
2627                  * If the type of the new ROC has higher priority, modify the
2628                  * type of the previous one to match that of the new one.
2629                  */
2630                 if (!tmp->started) {
2631                         list_add_tail(&roc->list, &tmp->dependents);
2632                         tmp->duration = max(tmp->duration, roc->duration);
2633                         tmp->type = max(tmp->type, roc->type);
2634                         queued = true;
2635                         break;
2636                 }
2637
2638                 /* If it has already started, it's more difficult ... */
2639                 if (local->ops->remain_on_channel) {
2640                         /*
2641                          * In the offloaded ROC case, if it hasn't begun, add
2642                          * this new one to the dependent list to be handled
2643                          * when the master one begins. If it has begun,
2644                          * check if it fits entirely within the existing one,
2645                          * in which case it will just be dependent as well.
2646                          * Otherwise, schedule it by itself.
2647                          */
2648                         if (!tmp->hw_begun) {
2649                                 list_add_tail(&roc->list, &tmp->dependents);
2650                                 queued = true;
2651                                 break;
2652                         }
2653
2654                         if (ieee80211_coalesce_started_roc(local, roc, tmp))
2655                                 queued = true;
2656                 } else if (del_timer_sync(&tmp->work.timer)) {
2657                         unsigned long new_end;
2658
2659                         /*
2660                          * In the software ROC case, cancel the timer, if
2661                          * that fails then the finish work is already
2662                          * queued/pending and thus we queue the new ROC
2663                          * normally, if that succeeds then we can extend
2664                          * the timer duration and TX the frame (if any.)
2665                          */
2666
2667                         list_add_tail(&roc->list, &tmp->dependents);
2668                         queued = true;
2669
2670                         new_end = jiffies + msecs_to_jiffies(roc->duration);
2671
2672                         /* ok, it was started & we canceled timer */
2673                         if (time_after(new_end, tmp->work.timer.expires))
2674                                 mod_timer(&tmp->work.timer, new_end);
2675                         else
2676                                 add_timer(&tmp->work.timer);
2677
2678                         ieee80211_handle_roc_started(roc);
2679                 }
2680                 break;
2681         }
2682
2683  out_queue:
2684         if (!queued)
2685                 list_add_tail(&roc->list, &local->roc_list);
2686
2687         return 0;
2688 }
2689
2690 static int ieee80211_remain_on_channel(struct wiphy *wiphy,
2691                                        struct wireless_dev *wdev,
2692                                        struct ieee80211_channel *chan,
2693                                        unsigned int duration,
2694                                        u64 *cookie)
2695 {
2696         struct ieee80211_sub_if_data *sdata = IEEE80211_WDEV_TO_SUB_IF(wdev);
2697         struct ieee80211_local *local = sdata->local;
2698         int ret;
2699
2700         mutex_lock(&local->mtx);
2701         ret = ieee80211_start_roc_work(local, sdata, chan,
2702                                        duration, cookie, NULL,
2703                                        IEEE80211_ROC_TYPE_NORMAL);
2704         mutex_unlock(&local->mtx);
2705
2706         return ret;
2707 }
2708
2709 static int ieee80211_cancel_roc(struct ieee80211_local *local,
2710                                 u64 cookie, bool mgmt_tx)
2711 {
2712         struct ieee80211_roc_work *roc, *tmp, *found = NULL;
2713         int ret;
2714
2715         mutex_lock(&local->mtx);
2716         list_for_each_entry_safe(roc, tmp, &local->roc_list, list) {
2717                 struct ieee80211_roc_work *dep, *tmp2;
2718
2719                 list_for_each_entry_safe(dep, tmp2, &roc->dependents, list) {
2720                         if (!mgmt_tx && dep->cookie != cookie)
2721                                 continue;
2722                         else if (mgmt_tx && dep->mgmt_tx_cookie != cookie)
2723                                 continue;
2724                         /* found dependent item -- just remove it */
2725                         list_del(&dep->list);
2726                         mutex_unlock(&local->mtx);
2727
2728                         ieee80211_roc_notify_destroy(dep, true);
2729                         return 0;
2730                 }
2731
2732                 if (!mgmt_tx && roc->cookie != cookie)
2733                         continue;
2734                 else if (mgmt_tx && roc->mgmt_tx_cookie != cookie)
2735                         continue;
2736
2737                 found = roc;
2738                 break;
2739         }
2740
2741         if (!found) {
2742                 mutex_unlock(&local->mtx);
2743                 return -ENOENT;
2744         }
2745
2746         /*
2747          * We found the item to cancel, so do that. Note that it
2748          * may have dependents, which we also cancel (and send
2749          * the expired signal for.) Not doing so would be quite
2750          * tricky here, but we may need to fix it later.
2751          */
2752
2753         if (local->ops->remain_on_channel) {
2754                 if (found->started) {
2755                         ret = drv_cancel_remain_on_channel(local);
2756                         if (WARN_ON_ONCE(ret)) {
2757                                 mutex_unlock(&local->mtx);
2758                                 return ret;
2759                         }
2760                 }
2761
2762                 list_del(&found->list);
2763
2764                 if (found->started)
2765                         ieee80211_start_next_roc(local);
2766                 mutex_unlock(&local->mtx);
2767
2768                 ieee80211_roc_notify_destroy(found, true);
2769         } else {
2770                 /* work may be pending so use it all the time */
2771                 found->abort = true;
2772                 ieee80211_queue_delayed_work(&local->hw, &found->work, 0);
2773
2774                 mutex_unlock(&local->mtx);
2775
2776                 /* work will clean up etc */
2777                 flush_delayed_work(&found->work);
2778                 WARN_ON(!found->to_be_freed);
2779                 kfree(found);
2780         }
2781
2782         return 0;
2783 }
2784
2785 static int ieee80211_cancel_remain_on_channel(struct wiphy *wiphy,
2786                                               struct wireless_dev *wdev,
2787                                               u64 cookie)
2788 {
2789         struct ieee80211_sub_if_data *sdata = IEEE80211_WDEV_TO_SUB_IF(wdev);
2790         struct ieee80211_local *local = sdata->local;
2791
2792         return ieee80211_cancel_roc(local, cookie, false);
2793 }
2794
2795 static int ieee80211_start_radar_detection(struct wiphy *wiphy,
2796                                            struct net_device *dev,
2797                                            struct cfg80211_chan_def *chandef,
2798                                            u32 cac_time_ms)
2799 {
2800         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2801         struct ieee80211_local *local = sdata->local;
2802         int err;
2803
2804         mutex_lock(&local->mtx);
2805         if (!list_empty(&local->roc_list) || local->scanning) {
2806                 err = -EBUSY;
2807                 goto out_unlock;
2808         }
2809
2810         /* whatever, but channel contexts should not complain about that one */
2811         sdata->smps_mode = IEEE80211_SMPS_OFF;
2812         sdata->needed_rx_chains = local->rx_chains;
2813
2814         err = ieee80211_vif_use_channel(sdata, chandef,
2815                                         IEEE80211_CHANCTX_SHARED);
2816         if (err)
2817                 goto out_unlock;
2818
2819         ieee80211_queue_delayed_work(&sdata->local->hw,
2820                                      &sdata->dfs_cac_timer_work,
2821                                      msecs_to_jiffies(cac_time_ms));
2822
2823  out_unlock:
2824         mutex_unlock(&local->mtx);
2825         return err;
2826 }
2827
2828 static struct cfg80211_beacon_data *
2829 cfg80211_beacon_dup(struct cfg80211_beacon_data *beacon)
2830 {
2831         struct cfg80211_beacon_data *new_beacon;
2832         u8 *pos;
2833         int len;
2834
2835         len = beacon->head_len + beacon->tail_len + beacon->beacon_ies_len +
2836               beacon->proberesp_ies_len + beacon->assocresp_ies_len +
2837               beacon->probe_resp_len;
2838
2839         new_beacon = kzalloc(sizeof(*new_beacon) + len, GFP_KERNEL);
2840         if (!new_beacon)
2841                 return NULL;
2842
2843         pos = (u8 *)(new_beacon + 1);
2844         if (beacon->head_len) {
2845                 new_beacon->head_len = beacon->head_len;
2846                 new_beacon->head = pos;
2847                 memcpy(pos, beacon->head, beacon->head_len);
2848                 pos += beacon->head_len;
2849         }
2850         if (beacon->tail_len) {
2851                 new_beacon->tail_len = beacon->tail_len;
2852                 new_beacon->tail = pos;
2853                 memcpy(pos, beacon->tail, beacon->tail_len);
2854                 pos += beacon->tail_len;
2855         }
2856         if (beacon->beacon_ies_len) {
2857                 new_beacon->beacon_ies_len = beacon->beacon_ies_len;
2858                 new_beacon->beacon_ies = pos;
2859                 memcpy(pos, beacon->beacon_ies, beacon->beacon_ies_len);
2860                 pos += beacon->beacon_ies_len;
2861         }
2862         if (beacon->proberesp_ies_len) {
2863                 new_beacon->proberesp_ies_len = beacon->proberesp_ies_len;
2864                 new_beacon->proberesp_ies = pos;
2865                 memcpy(pos, beacon->proberesp_ies, beacon->proberesp_ies_len);
2866                 pos += beacon->proberesp_ies_len;
2867         }
2868         if (beacon->assocresp_ies_len) {
2869                 new_beacon->assocresp_ies_len = beacon->assocresp_ies_len;
2870                 new_beacon->assocresp_ies = pos;
2871                 memcpy(pos, beacon->assocresp_ies, beacon->assocresp_ies_len);
2872                 pos += beacon->assocresp_ies_len;
2873         }
2874         if (beacon->probe_resp_len) {
2875                 new_beacon->probe_resp_len = beacon->probe_resp_len;
2876                 beacon->probe_resp = pos;
2877                 memcpy(pos, beacon->probe_resp, beacon->probe_resp_len);
2878                 pos += beacon->probe_resp_len;
2879         }
2880
2881         return new_beacon;
2882 }
2883
2884 void ieee80211_csa_finish(struct ieee80211_vif *vif)
2885 {
2886         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2887
2888         ieee80211_queue_work(&sdata->local->hw,
2889                              &sdata->csa_finalize_work);
2890 }
2891 EXPORT_SYMBOL(ieee80211_csa_finish);
2892
2893 static int ieee80211_set_after_csa_beacon(struct ieee80211_sub_if_data *sdata,
2894                                           u32 *changed)
2895 {
2896         int err;
2897
2898         switch (sdata->vif.type) {
2899         case NL80211_IFTYPE_AP:
2900                 err = ieee80211_assign_beacon(sdata, sdata->u.ap.next_beacon,
2901                                               NULL);
2902                 kfree(sdata->u.ap.next_beacon);
2903                 sdata->u.ap.next_beacon = NULL;
2904
2905                 if (err < 0)
2906                         return err;
2907                 *changed |= err;
2908                 break;
2909         case NL80211_IFTYPE_ADHOC:
2910                 err = ieee80211_ibss_finish_csa(sdata);
2911                 if (err < 0)
2912                         return err;
2913                 *changed |= err;
2914                 break;
2915 #ifdef CONFIG_MAC80211_MESH
2916         case NL80211_IFTYPE_MESH_POINT:
2917                 err = ieee80211_mesh_finish_csa(sdata);
2918                 if (err < 0)
2919                         return err;
2920                 *changed |= err;
2921                 break;
2922 #endif
2923         default:
2924                 WARN_ON(1);
2925                 return -EINVAL;
2926         }
2927
2928         return 0;
2929 }
2930
2931 static int __ieee80211_csa_finalize(struct ieee80211_sub_if_data *sdata)
2932 {
2933         struct ieee80211_local *local = sdata->local;
2934         u32 changed = 0;
2935         int err;
2936
2937         sdata_assert_lock(sdata);
2938         lockdep_assert_held(&local->mtx);
2939         lockdep_assert_held(&local->chanctx_mtx);
2940
2941         /*
2942          * using reservation isn't immediate as it may be deferred until later
2943          * with multi-vif. once reservation is complete it will re-schedule the
2944          * work with no reserved_chanctx so verify chandef to check if it
2945          * completed successfully
2946          */
2947
2948         if (sdata->reserved_chanctx) {
2949                 /*
2950                  * with multi-vif csa driver may call ieee80211_csa_finish()
2951                  * many times while waiting for other interfaces to use their
2952                  * reservations
2953                  */
2954                 if (sdata->reserved_ready)
2955                         return 0;
2956
2957                 return ieee80211_vif_use_reserved_context(sdata);
2958         }
2959
2960         if (!cfg80211_chandef_identical(&sdata->vif.bss_conf.chandef,
2961                                         &sdata->csa_chandef))
2962                 return -EINVAL;
2963
2964         sdata->vif.csa_active = false;
2965
2966         err = ieee80211_set_after_csa_beacon(sdata, &changed);
2967         if (err)
2968                 return err;
2969
2970         ieee80211_bss_info_change_notify(sdata, changed);
2971
2972         if (sdata->csa_block_tx) {
2973                 ieee80211_wake_vif_queues(local, sdata,
2974                                           IEEE80211_QUEUE_STOP_REASON_CSA);
2975                 sdata->csa_block_tx = false;
2976         }
2977
2978         err = drv_post_channel_switch(sdata);
2979         if (err)
2980                 return err;
2981
2982         cfg80211_ch_switch_notify(sdata->dev, &sdata->csa_chandef);
2983
2984         return 0;
2985 }
2986
2987 static void ieee80211_csa_finalize(struct ieee80211_sub_if_data *sdata)
2988 {
2989         if (__ieee80211_csa_finalize(sdata)) {
2990                 sdata_info(sdata, "failed to finalize CSA, disconnecting\n");
2991                 cfg80211_stop_iface(sdata->local->hw.wiphy, &sdata->wdev,
2992                                     GFP_KERNEL);
2993         }
2994 }
2995
2996 void ieee80211_csa_finalize_work(struct work_struct *work)
2997 {
2998         struct ieee80211_sub_if_data *sdata =
2999                 container_of(work, struct ieee80211_sub_if_data,
3000                              csa_finalize_work);
3001         struct ieee80211_local *local = sdata->local;
3002
3003         sdata_lock(sdata);
3004         mutex_lock(&local->mtx);
3005         mutex_lock(&local->chanctx_mtx);
3006
3007         /* AP might have been stopped while waiting for the lock. */
3008         if (!sdata->vif.csa_active)
3009                 goto unlock;
3010
3011         if (!ieee80211_sdata_running(sdata))
3012                 goto unlock;
3013
3014         ieee80211_csa_finalize(sdata);
3015
3016 unlock:
3017         mutex_unlock(&local->chanctx_mtx);
3018         mutex_unlock(&local->mtx);
3019         sdata_unlock(sdata);
3020 }
3021
3022 static int ieee80211_set_csa_beacon(struct ieee80211_sub_if_data *sdata,
3023                                     struct cfg80211_csa_settings *params,
3024                                     u32 *changed)
3025 {
3026         struct ieee80211_csa_settings csa = {};
3027         int err;
3028
3029         switch (sdata->vif.type) {
3030         case NL80211_IFTYPE_AP:
3031                 sdata->u.ap.next_beacon =
3032                         cfg80211_beacon_dup(&params->beacon_after);
3033                 if (!sdata->u.ap.next_beacon)
3034                         return -ENOMEM;
3035
3036                 /*
3037                  * With a count of 0, we don't have to wait for any
3038                  * TBTT before switching, so complete the CSA
3039                  * immediately.  In theory, with a count == 1 we
3040                  * should delay the switch until just before the next
3041                  * TBTT, but that would complicate things so we switch
3042                  * immediately too.  If we would delay the switch
3043                  * until the next TBTT, we would have to set the probe
3044                  * response here.
3045                  *
3046                  * TODO: A channel switch with count <= 1 without
3047                  * sending a CSA action frame is kind of useless,
3048                  * because the clients won't know we're changing
3049                  * channels.  The action frame must be implemented
3050                  * either here or in the userspace.
3051                  */
3052                 if (params->count <= 1)
3053                         break;
3054
3055                 if ((params->n_counter_offsets_beacon >
3056                      IEEE80211_MAX_CSA_COUNTERS_NUM) ||
3057                     (params->n_counter_offsets_presp >
3058                      IEEE80211_MAX_CSA_COUNTERS_NUM))
3059                         return -EINVAL;
3060
3061                 csa.counter_offsets_beacon = params->counter_offsets_beacon;
3062                 csa.counter_offsets_presp = params->counter_offsets_presp;
3063                 csa.n_counter_offsets_beacon = params->n_counter_offsets_beacon;
3064                 csa.n_counter_offsets_presp = params->n_counter_offsets_presp;
3065                 csa.count = params->count;
3066
3067                 err = ieee80211_assign_beacon(sdata, &params->beacon_csa, &csa);
3068                 if (err < 0) {
3069                         kfree(sdata->u.ap.next_beacon);
3070                         return err;
3071                 }
3072                 *changed |= err;
3073
3074                 break;
3075         case NL80211_IFTYPE_ADHOC:
3076                 if (!sdata->vif.bss_conf.ibss_joined)
3077                         return -EINVAL;
3078
3079                 if (params->chandef.width != sdata->u.ibss.chandef.width)
3080                         return -EINVAL;
3081
3082                 switch (params->chandef.width) {
3083                 case NL80211_CHAN_WIDTH_40:
3084                         if (cfg80211_get_chandef_type(&params->chandef) !=
3085                             cfg80211_get_chandef_type(&sdata->u.ibss.chandef))
3086                                 return -EINVAL;
3087                 case NL80211_CHAN_WIDTH_5:
3088                 case NL80211_CHAN_WIDTH_10:
3089                 case NL80211_CHAN_WIDTH_20_NOHT:
3090                 case NL80211_CHAN_WIDTH_20:
3091                         break;
3092                 default:
3093                         return -EINVAL;
3094                 }
3095
3096                 /* changes into another band are not supported */
3097                 if (sdata->u.ibss.chandef.chan->band !=
3098                     params->chandef.chan->band)
3099                         return -EINVAL;
3100
3101                 /* see comments in the NL80211_IFTYPE_AP block */
3102                 if (params->count > 1) {
3103                         err = ieee80211_ibss_csa_beacon(sdata, params);
3104                         if (err < 0)
3105                                 return err;
3106                         *changed |= err;
3107                 }
3108
3109                 ieee80211_send_action_csa(sdata, params);
3110
3111                 break;
3112 #ifdef CONFIG_MAC80211_MESH
3113         case NL80211_IFTYPE_MESH_POINT: {
3114                 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
3115
3116                 if (params->chandef.width != sdata->vif.bss_conf.chandef.width)
3117                         return -EINVAL;
3118
3119                 /* changes into another band are not supported */
3120                 if (sdata->vif.bss_conf.chandef.chan->band !=
3121                     params->chandef.chan->band)
3122                         return -EINVAL;
3123
3124                 if (ifmsh->csa_role == IEEE80211_MESH_CSA_ROLE_NONE) {
3125                         ifmsh->csa_role = IEEE80211_MESH_CSA_ROLE_INIT;
3126                         if (!ifmsh->pre_value)
3127                                 ifmsh->pre_value = 1;
3128                         else
3129                                 ifmsh->pre_value++;
3130                 }
3131
3132                 /* see comments in the NL80211_IFTYPE_AP block */
3133                 if (params->count > 1) {
3134                         err = ieee80211_mesh_csa_beacon(sdata, params);
3135                         if (err < 0) {
3136                                 ifmsh->csa_role = IEEE80211_MESH_CSA_ROLE_NONE;
3137                                 return err;
3138                         }
3139                         *changed |= err;
3140                 }
3141
3142                 if (ifmsh->csa_role == IEEE80211_MESH_CSA_ROLE_INIT)
3143                         ieee80211_send_action_csa(sdata, params);
3144
3145                 break;
3146                 }
3147 #endif
3148         default:
3149                 return -EOPNOTSUPP;
3150         }
3151
3152         return 0;
3153 }
3154
3155 static int
3156 __ieee80211_channel_switch(struct wiphy *wiphy, struct net_device *dev,
3157                            struct cfg80211_csa_settings *params)
3158 {
3159         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3160         struct ieee80211_local *local = sdata->local;
3161         struct ieee80211_channel_switch ch_switch;
3162         struct ieee80211_chanctx_conf *conf;
3163         struct ieee80211_chanctx *chanctx;
3164         u32 changed = 0;
3165         int err;
3166
3167         sdata_assert_lock(sdata);
3168         lockdep_assert_held(&local->mtx);
3169
3170         if (!list_empty(&local->roc_list) || local->scanning)
3171                 return -EBUSY;
3172
3173         if (sdata->wdev.cac_started)
3174                 return -EBUSY;
3175
3176         if (cfg80211_chandef_identical(&params->chandef,
3177                                        &sdata->vif.bss_conf.chandef))
3178                 return -EINVAL;
3179
3180         /* don't allow another channel switch if one is already active. */
3181         if (sdata->vif.csa_active)
3182                 return -EBUSY;
3183
3184         mutex_lock(&local->chanctx_mtx);
3185         conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
3186                                          lockdep_is_held(&local->chanctx_mtx));
3187         if (!conf) {
3188                 err = -EBUSY;
3189                 goto out;
3190         }
3191
3192         chanctx = container_of(conf, struct ieee80211_chanctx, conf);
3193         if (!chanctx) {
3194                 err = -EBUSY;
3195                 goto out;
3196         }
3197
3198         ch_switch.timestamp = 0;
3199         ch_switch.device_timestamp = 0;
3200         ch_switch.block_tx = params->block_tx;
3201         ch_switch.chandef = params->chandef;
3202         ch_switch.count = params->count;
3203
3204         err = drv_pre_channel_switch(sdata, &ch_switch);
3205         if (err)
3206                 goto out;
3207
3208         err = ieee80211_vif_reserve_chanctx(sdata, &params->chandef,
3209                                             chanctx->mode,
3210                                             params->radar_required);
3211         if (err)
3212                 goto out;
3213
3214         /* if reservation is invalid then this will fail */
3215         err = ieee80211_check_combinations(sdata, NULL, chanctx->mode, 0);
3216         if (err) {
3217                 ieee80211_vif_unreserve_chanctx(sdata);
3218                 goto out;
3219         }
3220
3221         err = ieee80211_set_csa_beacon(sdata, params, &changed);
3222         if (err) {
3223                 ieee80211_vif_unreserve_chanctx(sdata);
3224                 goto out;
3225         }
3226
3227         sdata->csa_chandef = params->chandef;
3228         sdata->csa_block_tx = params->block_tx;
3229         sdata->vif.csa_active = true;
3230
3231         if (sdata->csa_block_tx)
3232                 ieee80211_stop_vif_queues(local, sdata,
3233                                           IEEE80211_QUEUE_STOP_REASON_CSA);
3234
3235         cfg80211_ch_switch_started_notify(sdata->dev, &sdata->csa_chandef,
3236                                           params->count);
3237
3238         if (changed) {
3239                 ieee80211_bss_info_change_notify(sdata, changed);
3240                 drv_channel_switch_beacon(sdata, &params->chandef);
3241         } else {
3242                 /* if the beacon didn't change, we can finalize immediately */
3243                 ieee80211_csa_finalize(sdata);
3244         }
3245
3246 out:
3247         mutex_unlock(&local->chanctx_mtx);
3248         return err;
3249 }
3250
3251 int ieee80211_channel_switch(struct wiphy *wiphy, struct net_device *dev,
3252                              struct cfg80211_csa_settings *params)
3253 {
3254         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3255         struct ieee80211_local *local = sdata->local;
3256         int err;
3257
3258         mutex_lock(&local->mtx);
3259         err = __ieee80211_channel_switch(wiphy, dev, params);
3260         mutex_unlock(&local->mtx);
3261
3262         return err;
3263 }
3264
3265 static struct sk_buff *ieee80211_make_ack_skb(struct ieee80211_local *local,
3266                                               struct sk_buff *skb, u64 *cookie,
3267                                               gfp_t gfp)
3268 {
3269         unsigned long spin_flags;
3270         struct sk_buff *ack_skb;
3271         int id;
3272
3273         ack_skb = skb_copy(skb, gfp);
3274         if (!ack_skb)
3275                 return ERR_PTR(-ENOMEM);
3276
3277         spin_lock_irqsave(&local->ack_status_lock, spin_flags);
3278         id = idr_alloc(&local->ack_status_frames, ack_skb,
3279                        1, 0x10000, GFP_ATOMIC);
3280         spin_unlock_irqrestore(&local->ack_status_lock, spin_flags);
3281
3282         if (id < 0) {
3283                 kfree_skb(ack_skb);
3284                 return ERR_PTR(-ENOMEM);
3285         }
3286
3287         IEEE80211_SKB_CB(skb)->ack_frame_id = id;
3288
3289         *cookie = ieee80211_mgmt_tx_cookie(local);
3290         IEEE80211_SKB_CB(ack_skb)->ack.cookie = *cookie;
3291
3292         return ack_skb;
3293 }
3294
3295 static int ieee80211_mgmt_tx(struct wiphy *wiphy, struct wireless_dev *wdev,
3296                              struct cfg80211_mgmt_tx_params *params,
3297                              u64 *cookie)
3298 {
3299         struct ieee80211_sub_if_data *sdata = IEEE80211_WDEV_TO_SUB_IF(wdev);
3300         struct ieee80211_local *local = sdata->local;
3301         struct sk_buff *skb, *ack_skb;
3302         struct sta_info *sta;
3303         const struct ieee80211_mgmt *mgmt = (void *)params->buf;
3304         bool need_offchan = false;
3305         u32 flags;
3306         int ret;
3307         u8 *data;
3308
3309         if (params->dont_wait_for_ack)
3310                 flags = IEEE80211_TX_CTL_NO_ACK;
3311         else
3312                 flags = IEEE80211_TX_INTFL_NL80211_FRAME_TX |
3313                         IEEE80211_TX_CTL_REQ_TX_STATUS;
3314
3315         if (params->no_cck)
3316                 flags |= IEEE80211_TX_CTL_NO_CCK_RATE;
3317
3318         switch (sdata->vif.type) {
3319         case NL80211_IFTYPE_ADHOC:
3320                 if (!sdata->vif.bss_conf.ibss_joined)
3321                         need_offchan = true;
3322                 /* fall through */
3323 #ifdef CONFIG_MAC80211_MESH
3324         case NL80211_IFTYPE_MESH_POINT:
3325                 if (ieee80211_vif_is_mesh(&sdata->vif) &&
3326                     !sdata->u.mesh.mesh_id_len)
3327                         need_offchan = true;
3328                 /* fall through */
3329 #endif
3330         case NL80211_IFTYPE_AP:
3331         case NL80211_IFTYPE_AP_VLAN:
3332         case NL80211_IFTYPE_P2P_GO:
3333                 if (sdata->vif.type != NL80211_IFTYPE_ADHOC &&
3334                     !ieee80211_vif_is_mesh(&sdata->vif) &&
3335                     !rcu_access_pointer(sdata->bss->beacon))
3336                         need_offchan = true;
3337                 if (!ieee80211_is_action(mgmt->frame_control) ||
3338                     mgmt->u.action.category == WLAN_CATEGORY_PUBLIC ||
3339                     mgmt->u.action.category == WLAN_CATEGORY_SELF_PROTECTED ||
3340                     mgmt->u.action.category == WLAN_CATEGORY_SPECTRUM_MGMT)
3341                         break;
3342                 rcu_read_lock();
3343                 sta = sta_info_get(sdata, mgmt->da);
3344                 rcu_read_unlock();
3345                 if (!sta)
3346                         return -ENOLINK;
3347                 break;
3348         case NL80211_IFTYPE_STATION:
3349         case NL80211_IFTYPE_P2P_CLIENT:
3350                 sdata_lock(sdata);
3351                 if (!sdata->u.mgd.associated ||
3352                     (params->offchan && params->wait &&
3353                      local->ops->remain_on_channel &&
3354                      memcmp(sdata->u.mgd.associated->bssid,
3355                             mgmt->bssid, ETH_ALEN)))
3356                         need_offchan = true;
3357                 sdata_unlock(sdata);
3358                 break;
3359         case NL80211_IFTYPE_P2P_DEVICE:
3360                 need_offchan = true;
3361                 break;
3362         default:
3363                 return -EOPNOTSUPP;
3364         }
3365
3366         /* configurations requiring offchan cannot work if no channel has been
3367          * specified
3368          */
3369         if (need_offchan && !params->chan)
3370                 return -EINVAL;
3371
3372         mutex_lock(&local->mtx);
3373
3374         /* Check if the operating channel is the requested channel */
3375         if (!need_offchan) {
3376                 struct ieee80211_chanctx_conf *chanctx_conf;
3377
3378                 rcu_read_lock();
3379                 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
3380
3381                 if (chanctx_conf) {
3382                         need_offchan = params->chan &&
3383                                        (params->chan !=
3384                                         chanctx_conf->def.chan);
3385                 } else if (!params->chan) {
3386                         ret = -EINVAL;
3387                         rcu_read_unlock();
3388                         goto out_unlock;
3389                 } else {
3390                         need_offchan = true;
3391                 }
3392                 rcu_read_unlock();
3393         }
3394
3395         if (need_offchan && !params->offchan) {
3396                 ret = -EBUSY;
3397                 goto out_unlock;
3398         }
3399
3400         skb = dev_alloc_skb(local->hw.extra_tx_headroom + params->len);
3401         if (!skb) {
3402                 ret = -ENOMEM;
3403                 goto out_unlock;
3404         }
3405         skb_reserve(skb, local->hw.extra_tx_headroom);
3406
3407         data = skb_put(skb, params->len);
3408         memcpy(data, params->buf, params->len);
3409
3410         /* Update CSA counters */
3411         if (sdata->vif.csa_active &&
3412             (sdata->vif.type == NL80211_IFTYPE_AP ||
3413              sdata->vif.type == NL80211_IFTYPE_MESH_POINT ||
3414              sdata->vif.type == NL80211_IFTYPE_ADHOC) &&
3415             params->n_csa_offsets) {
3416                 int i;
3417                 struct beacon_data *beacon = NULL;
3418
3419                 rcu_read_lock();
3420
3421                 if (sdata->vif.type == NL80211_IFTYPE_AP)
3422                         beacon = rcu_dereference(sdata->u.ap.beacon);
3423                 else if (sdata->vif.type == NL80211_IFTYPE_ADHOC)
3424                         beacon = rcu_dereference(sdata->u.ibss.presp);
3425                 else if (ieee80211_vif_is_mesh(&sdata->vif))
3426                         beacon = rcu_dereference(sdata->u.mesh.beacon);
3427
3428                 if (beacon)
3429                         for (i = 0; i < params->n_csa_offsets; i++)
3430                                 data[params->csa_offsets[i]] =
3431                                         beacon->csa_current_counter;
3432
3433                 rcu_read_unlock();
3434         }
3435
3436         IEEE80211_SKB_CB(skb)->flags = flags;
3437
3438         skb->dev = sdata->dev;
3439
3440         if (!params->dont_wait_for_ack) {
3441                 /* make a copy to preserve the frame contents
3442                  * in case of encryption.
3443                  */
3444                 ack_skb = ieee80211_make_ack_skb(local, skb, cookie,
3445                                                  GFP_KERNEL);
3446                 if (IS_ERR(ack_skb)) {
3447                         ret = PTR_ERR(ack_skb);
3448                         kfree_skb(skb);
3449                         goto out_unlock;
3450                 }
3451         } else {
3452                 /* for cookie below */
3453                 ack_skb = skb;
3454         }
3455
3456         if (!need_offchan) {
3457                 ieee80211_tx_skb(sdata, skb);
3458                 ret = 0;
3459                 goto out_unlock;
3460         }
3461
3462         IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_TX_OFFCHAN |
3463                                         IEEE80211_TX_INTFL_OFFCHAN_TX_OK;
3464         if (ieee80211_hw_check(&local->hw, QUEUE_CONTROL))
3465                 IEEE80211_SKB_CB(skb)->hw_queue =
3466                         local->hw.offchannel_tx_hw_queue;
3467
3468         /* This will handle all kinds of coalescing and immediate TX */
3469         ret = ieee80211_start_roc_work(local, sdata, params->chan,
3470                                        params->wait, cookie, skb,
3471                                        IEEE80211_ROC_TYPE_MGMT_TX);
3472         if (ret)
3473                 kfree_skb(skb);
3474  out_unlock:
3475         mutex_unlock(&local->mtx);
3476         return ret;
3477 }
3478
3479 static int ieee80211_mgmt_tx_cancel_wait(struct wiphy *wiphy,
3480                                          struct wireless_dev *wdev,
3481                                          u64 cookie)
3482 {
3483         struct ieee80211_local *local = wiphy_priv(wiphy);
3484
3485         return ieee80211_cancel_roc(local, cookie, true);
3486 }
3487
3488 static void ieee80211_mgmt_frame_register(struct wiphy *wiphy,
3489                                           struct wireless_dev *wdev,
3490                                           u16 frame_type, bool reg)
3491 {
3492         struct ieee80211_local *local = wiphy_priv(wiphy);
3493
3494         switch (frame_type) {
3495         case IEEE80211_FTYPE_MGMT | IEEE80211_STYPE_PROBE_REQ:
3496                 if (reg)
3497                         local->probe_req_reg++;
3498                 else
3499                         local->probe_req_reg--;
3500
3501                 if (!local->open_count)
3502                         break;
3503
3504                 ieee80211_queue_work(&local->hw, &local->reconfig_filter);
3505                 break;
3506         default:
3507                 break;
3508         }
3509 }
3510
3511 static int ieee80211_set_antenna(struct wiphy *wiphy, u32 tx_ant, u32 rx_ant)
3512 {
3513         struct ieee80211_local *local = wiphy_priv(wiphy);
3514
3515         if (local->started)
3516                 return -EOPNOTSUPP;
3517
3518         return drv_set_antenna(local, tx_ant, rx_ant);
3519 }
3520
3521 static int ieee80211_get_antenna(struct wiphy *wiphy, u32 *tx_ant, u32 *rx_ant)
3522 {
3523         struct ieee80211_local *local = wiphy_priv(wiphy);
3524
3525         return drv_get_antenna(local, tx_ant, rx_ant);
3526 }
3527
3528 static int ieee80211_set_rekey_data(struct wiphy *wiphy,
3529                                     struct net_device *dev,
3530                                     struct cfg80211_gtk_rekey_data *data)
3531 {
3532         struct ieee80211_local *local = wiphy_priv(wiphy);
3533         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3534
3535         if (!local->ops->set_rekey_data)
3536                 return -EOPNOTSUPP;
3537
3538         drv_set_rekey_data(local, sdata, data);
3539
3540         return 0;
3541 }
3542
3543 static int ieee80211_probe_client(struct wiphy *wiphy, struct net_device *dev,
3544                                   const u8 *peer, u64 *cookie)
3545 {
3546         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3547         struct ieee80211_local *local = sdata->local;
3548         struct ieee80211_qos_hdr *nullfunc;
3549         struct sk_buff *skb, *ack_skb;
3550         int size = sizeof(*nullfunc);
3551         __le16 fc;
3552         bool qos;
3553         struct ieee80211_tx_info *info;
3554         struct sta_info *sta;
3555         struct ieee80211_chanctx_conf *chanctx_conf;
3556         enum ieee80211_band band;
3557         int ret;
3558
3559         /* the lock is needed to assign the cookie later */
3560         mutex_lock(&local->mtx);
3561
3562         rcu_read_lock();
3563         chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
3564         if (WARN_ON(!chanctx_conf)) {
3565                 ret = -EINVAL;
3566                 goto unlock;
3567         }
3568         band = chanctx_conf->def.chan->band;
3569         sta = sta_info_get_bss(sdata, peer);
3570         if (sta) {
3571                 qos = sta->sta.wme;
3572         } else {
3573                 ret = -ENOLINK;
3574                 goto unlock;
3575         }
3576
3577         if (qos) {
3578                 fc = cpu_to_le16(IEEE80211_FTYPE_DATA |
3579                                  IEEE80211_STYPE_QOS_NULLFUNC |
3580                                  IEEE80211_FCTL_FROMDS);
3581         } else {
3582                 size -= 2;
3583                 fc = cpu_to_le16(IEEE80211_FTYPE_DATA |
3584                                  IEEE80211_STYPE_NULLFUNC |
3585                                  IEEE80211_FCTL_FROMDS);
3586         }
3587
3588         skb = dev_alloc_skb(local->hw.extra_tx_headroom + size);
3589         if (!skb) {
3590                 ret = -ENOMEM;
3591                 goto unlock;
3592         }
3593
3594         skb->dev = dev;
3595
3596         skb_reserve(skb, local->hw.extra_tx_headroom);
3597
3598         nullfunc = (void *) skb_put(skb, size);
3599         nullfunc->frame_control = fc;
3600         nullfunc->duration_id = 0;
3601         memcpy(nullfunc->addr1, sta->sta.addr, ETH_ALEN);
3602         memcpy(nullfunc->addr2, sdata->vif.addr, ETH_ALEN);
3603         memcpy(nullfunc->addr3, sdata->vif.addr, ETH_ALEN);
3604         nullfunc->seq_ctrl = 0;
3605
3606         info = IEEE80211_SKB_CB(skb);
3607
3608         info->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS |
3609                        IEEE80211_TX_INTFL_NL80211_FRAME_TX;
3610         info->band = band;
3611
3612         skb_set_queue_mapping(skb, IEEE80211_AC_VO);
3613         skb->priority = 7;
3614         if (qos)
3615                 nullfunc->qos_ctrl = cpu_to_le16(7);
3616
3617         ack_skb = ieee80211_make_ack_skb(local, skb, cookie, GFP_ATOMIC);
3618         if (IS_ERR(ack_skb)) {
3619                 kfree_skb(skb);
3620                 ret = PTR_ERR(ack_skb);
3621                 goto unlock;
3622         }
3623
3624         local_bh_disable();
3625         ieee80211_xmit(sdata, sta, skb);
3626         local_bh_enable();
3627
3628         ret = 0;
3629 unlock:
3630         rcu_read_unlock();
3631         mutex_unlock(&local->mtx);
3632
3633         return ret;
3634 }
3635
3636 static int ieee80211_cfg_get_channel(struct wiphy *wiphy,
3637                                      struct wireless_dev *wdev,
3638                                      struct cfg80211_chan_def *chandef)
3639 {
3640         struct ieee80211_sub_if_data *sdata = IEEE80211_WDEV_TO_SUB_IF(wdev);
3641         struct ieee80211_local *local = wiphy_priv(wiphy);
3642         struct ieee80211_chanctx_conf *chanctx_conf;
3643         int ret = -ENODATA;
3644
3645         rcu_read_lock();
3646         chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
3647         if (chanctx_conf) {
3648                 *chandef = sdata->vif.bss_conf.chandef;
3649                 ret = 0;
3650         } else if (local->open_count > 0 &&
3651                    local->open_count == local->monitors &&
3652                    sdata->vif.type == NL80211_IFTYPE_MONITOR) {
3653                 if (local->use_chanctx)
3654                         *chandef = local->monitor_chandef;
3655                 else
3656                         *chandef = local->_oper_chandef;
3657                 ret = 0;
3658         }
3659         rcu_read_unlock();
3660
3661         return ret;
3662 }
3663
3664 #ifdef CONFIG_PM
3665 static void ieee80211_set_wakeup(struct wiphy *wiphy, bool enabled)
3666 {
3667         drv_set_wakeup(wiphy_priv(wiphy), enabled);
3668 }
3669 #endif
3670
3671 static int ieee80211_set_qos_map(struct wiphy *wiphy,
3672                                  struct net_device *dev,
3673                                  struct cfg80211_qos_map *qos_map)
3674 {
3675         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3676         struct mac80211_qos_map *new_qos_map, *old_qos_map;
3677
3678         if (qos_map) {
3679                 new_qos_map = kzalloc(sizeof(*new_qos_map), GFP_KERNEL);
3680                 if (!new_qos_map)
3681                         return -ENOMEM;
3682                 memcpy(&new_qos_map->qos_map, qos_map, sizeof(*qos_map));
3683         } else {
3684                 /* A NULL qos_map was passed to disable QoS mapping */
3685                 new_qos_map = NULL;
3686         }
3687
3688         old_qos_map = sdata_dereference(sdata->qos_map, sdata);
3689         rcu_assign_pointer(sdata->qos_map, new_qos_map);
3690         if (old_qos_map)
3691                 kfree_rcu(old_qos_map, rcu_head);
3692
3693         return 0;
3694 }
3695
3696 static int ieee80211_set_ap_chanwidth(struct wiphy *wiphy,
3697                                       struct net_device *dev,
3698                                       struct cfg80211_chan_def *chandef)
3699 {
3700         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3701         int ret;
3702         u32 changed = 0;
3703
3704         ret = ieee80211_vif_change_bandwidth(sdata, chandef, &changed);
3705         if (ret == 0)
3706                 ieee80211_bss_info_change_notify(sdata, changed);
3707
3708         return ret;
3709 }
3710
3711 static int ieee80211_add_tx_ts(struct wiphy *wiphy, struct net_device *dev,
3712                                u8 tsid, const u8 *peer, u8 up,
3713                                u16 admitted_time)
3714 {
3715         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3716         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3717         int ac = ieee802_1d_to_ac[up];
3718
3719         if (sdata->vif.type != NL80211_IFTYPE_STATION)
3720                 return -EOPNOTSUPP;
3721
3722         if (!(sdata->wmm_acm & BIT(up)))
3723                 return -EINVAL;
3724
3725         if (ifmgd->tx_tspec[ac].admitted_time)
3726                 return -EBUSY;
3727
3728         if (admitted_time) {
3729                 ifmgd->tx_tspec[ac].admitted_time = 32 * admitted_time;
3730                 ifmgd->tx_tspec[ac].tsid = tsid;
3731                 ifmgd->tx_tspec[ac].up = up;
3732         }
3733
3734         return 0;
3735 }
3736
3737 static int ieee80211_del_tx_ts(struct wiphy *wiphy, struct net_device *dev,
3738                                u8 tsid, const u8 *peer)
3739 {
3740         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3741         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3742         struct ieee80211_local *local = wiphy_priv(wiphy);
3743         int ac;
3744
3745         for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
3746                 struct ieee80211_sta_tx_tspec *tx_tspec = &ifmgd->tx_tspec[ac];
3747
3748                 /* skip unused entries */
3749                 if (!tx_tspec->admitted_time)
3750                         continue;
3751
3752                 if (tx_tspec->tsid != tsid)
3753                         continue;
3754
3755                 /* due to this new packets will be reassigned to non-ACM ACs */
3756                 tx_tspec->up = -1;
3757
3758                 /* Make sure that all packets have been sent to avoid to
3759                  * restore the QoS params on packets that are still on the
3760                  * queues.
3761                  */
3762                 synchronize_net();
3763                 ieee80211_flush_queues(local, sdata, false);
3764
3765                 /* restore the normal QoS parameters
3766                  * (unconditionally to avoid races)
3767                  */
3768                 tx_tspec->action = TX_TSPEC_ACTION_STOP_DOWNGRADE;
3769                 tx_tspec->downgraded = false;
3770                 ieee80211_sta_handle_tspec_ac_params(sdata);
3771
3772                 /* finally clear all the data */
3773                 memset(tx_tspec, 0, sizeof(*tx_tspec));
3774
3775                 return 0;
3776         }
3777
3778         return -ENOENT;
3779 }
3780
3781 const struct cfg80211_ops mac80211_config_ops = {
3782         .add_virtual_intf = ieee80211_add_iface,
3783         .del_virtual_intf = ieee80211_del_iface,
3784         .change_virtual_intf = ieee80211_change_iface,
3785         .start_p2p_device = ieee80211_start_p2p_device,
3786         .stop_p2p_device = ieee80211_stop_p2p_device,
3787         .add_key = ieee80211_add_key,
3788         .del_key = ieee80211_del_key,
3789         .get_key = ieee80211_get_key,
3790         .set_default_key = ieee80211_config_default_key,
3791         .set_default_mgmt_key = ieee80211_config_default_mgmt_key,
3792         .start_ap = ieee80211_start_ap,
3793         .change_beacon = ieee80211_change_beacon,
3794         .stop_ap = ieee80211_stop_ap,
3795         .add_station = ieee80211_add_station,
3796         .del_station = ieee80211_del_station,
3797         .change_station = ieee80211_change_station,
3798         .get_station = ieee80211_get_station,
3799         .dump_station = ieee80211_dump_station,
3800         .dump_survey = ieee80211_dump_survey,
3801 #ifdef CONFIG_MAC80211_MESH
3802         .add_mpath = ieee80211_add_mpath,
3803         .del_mpath = ieee80211_del_mpath,
3804         .change_mpath = ieee80211_change_mpath,
3805         .get_mpath = ieee80211_get_mpath,
3806         .dump_mpath = ieee80211_dump_mpath,
3807         .get_mpp = ieee80211_get_mpp,
3808         .dump_mpp = ieee80211_dump_mpp,
3809         .update_mesh_config = ieee80211_update_mesh_config,
3810         .get_mesh_config = ieee80211_get_mesh_config,
3811         .join_mesh = ieee80211_join_mesh,
3812         .leave_mesh = ieee80211_leave_mesh,
3813 #endif
3814         .join_ocb = ieee80211_join_ocb,
3815         .leave_ocb = ieee80211_leave_ocb,
3816         .change_bss = ieee80211_change_bss,
3817         .set_txq_params = ieee80211_set_txq_params,
3818         .set_monitor_channel = ieee80211_set_monitor_channel,
3819         .suspend = ieee80211_suspend,
3820         .resume = ieee80211_resume,
3821         .scan = ieee80211_scan,
3822         .sched_scan_start = ieee80211_sched_scan_start,
3823         .sched_scan_stop = ieee80211_sched_scan_stop,
3824         .auth = ieee80211_auth,
3825         .assoc = ieee80211_assoc,
3826         .deauth = ieee80211_deauth,
3827         .disassoc = ieee80211_disassoc,
3828         .join_ibss = ieee80211_join_ibss,
3829         .leave_ibss = ieee80211_leave_ibss,
3830         .set_mcast_rate = ieee80211_set_mcast_rate,
3831         .set_wiphy_params = ieee80211_set_wiphy_params,
3832         .set_tx_power = ieee80211_set_tx_power,
3833         .get_tx_power = ieee80211_get_tx_power,
3834         .set_wds_peer = ieee80211_set_wds_peer,
3835         .rfkill_poll = ieee80211_rfkill_poll,
3836         CFG80211_TESTMODE_CMD(ieee80211_testmode_cmd)
3837         CFG80211_TESTMODE_DUMP(ieee80211_testmode_dump)
3838         .set_power_mgmt = ieee80211_set_power_mgmt,
3839         .set_bitrate_mask = ieee80211_set_bitrate_mask,
3840         .remain_on_channel = ieee80211_remain_on_channel,
3841         .cancel_remain_on_channel = ieee80211_cancel_remain_on_channel,
3842         .mgmt_tx = ieee80211_mgmt_tx,
3843         .mgmt_tx_cancel_wait = ieee80211_mgmt_tx_cancel_wait,
3844         .set_cqm_rssi_config = ieee80211_set_cqm_rssi_config,
3845         .mgmt_frame_register = ieee80211_mgmt_frame_register,
3846         .set_antenna = ieee80211_set_antenna,
3847         .get_antenna = ieee80211_get_antenna,
3848         .set_rekey_data = ieee80211_set_rekey_data,
3849         .tdls_oper = ieee80211_tdls_oper,
3850         .tdls_mgmt = ieee80211_tdls_mgmt,
3851         .tdls_channel_switch = ieee80211_tdls_channel_switch,
3852         .tdls_cancel_channel_switch = ieee80211_tdls_cancel_channel_switch,
3853         .probe_client = ieee80211_probe_client,
3854         .set_noack_map = ieee80211_set_noack_map,
3855 #ifdef CONFIG_PM
3856         .set_wakeup = ieee80211_set_wakeup,
3857 #endif
3858         .get_channel = ieee80211_cfg_get_channel,
3859         .start_radar_detection = ieee80211_start_radar_detection,
3860         .channel_switch = ieee80211_channel_switch,
3861         .set_qos_map = ieee80211_set_qos_map,
3862         .set_ap_chanwidth = ieee80211_set_ap_chanwidth,
3863         .add_tx_ts = ieee80211_add_tx_ts,
3864         .del_tx_ts = ieee80211_del_tx_ts,
3865 };