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 "rate.h"
  21 #include "mesh.h"
  22 #include "wme.h"
  23
  24 static struct wireless_dev *ieee80211_add_iface(struct wiphy *wiphy,
  25                                                 const char *name,
  26                                                 unsigned char name_assign_type,
  27                                                 enum nl80211_iftype type,
  28                                                 u32 *flags,
  29                                                 struct vif_params *params)
  30 {
  31         struct ieee80211_local *local = wiphy_priv(wiphy);
  32         struct wireless_dev *wdev;
  33         struct ieee80211_sub_if_data *sdata;
  34         int err;
  35
  36         err = ieee80211_if_add(local, name, name_assign_type, &wdev, type, params);
  37         if (err)
  38                 return ERR_PTR(err);
  39
  40         if (type == NL80211_IFTYPE_MONITOR && flags) {
  41                 sdata = IEEE80211_WDEV_TO_SUB_IF(wdev);
  42                 sdata->u.mntr_flags = *flags;
  43         }
  44
  45         return wdev;
  46 }
  47
  48 static int ieee80211_del_iface(struct wiphy *wiphy, struct wireless_dev *wdev)
  49 {
  50         ieee80211_if_remove(IEEE80211_WDEV_TO_SUB_IF(wdev));
  51
  52         return 0;
  53 }
  54
  55 static int ieee80211_change_iface(struct wiphy *wiphy,
  56                                   struct net_device *dev,
  57                                   enum nl80211_iftype type, u32 *flags,
  58                                   struct vif_params *params)
  59 {
  60         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
  61         int ret;
  62
  63         ret = ieee80211_if_change_type(sdata, type);
  64         if (ret)
  65                 return ret;
  66
  67         if (type == NL80211_IFTYPE_AP_VLAN &&
  68             params && params->use_4addr == 0)
  69                 RCU_INIT_POINTER(sdata->u.vlan.sta, NULL);
  70         else if (type == NL80211_IFTYPE_STATION &&
  71                  params && params->use_4addr >= 0)
  72                 sdata->u.mgd.use_4addr = params->use_4addr;
  73
  74         if (sdata->vif.type == NL80211_IFTYPE_MONITOR && flags) {
  75                 struct ieee80211_local *local = sdata->local;
  76
  77                 if (ieee80211_sdata_running(sdata)) {
  78                         u32 mask = MONITOR_FLAG_COOK_FRAMES |
  79                                    MONITOR_FLAG_ACTIVE;
  80
  81                         /*
  82                          * Prohibit MONITOR_FLAG_COOK_FRAMES and
  83                          * MONITOR_FLAG_ACTIVE to be changed while the
  84                          * interface is up.
  85                          * Else we would need to add a lot of cruft
  86                          * to update everything:
  87                          *      cooked_mntrs, monitor and all fif_* counters
  88                          *      reconfigure hardware
  89                          */
  90                         if ((*flags & mask) != (sdata->u.mntr_flags & mask))
  91                                 return -EBUSY;
  92
  93                         ieee80211_adjust_monitor_flags(sdata, -1);
  94                         sdata->u.mntr_flags = *flags;
  95                         ieee80211_adjust_monitor_flags(sdata, 1);
  96
  97                         ieee80211_configure_filter(local);
  98                 } else {
  99                         /*
 100                          * Because the interface is down, ieee80211_do_stop
 101                          * and ieee80211_do_open take care of "everything"
 102                          * mentioned in the comment above.
 103                          */
 104                         sdata->u.mntr_flags = *flags;
 105                 }
 106         }
 107
 108         return 0;
 109 }
 110
 111 static int ieee80211_start_p2p_device(struct wiphy *wiphy,
 112                                       struct wireless_dev *wdev)
 113 {
 114         struct ieee80211_sub_if_data *sdata = IEEE80211_WDEV_TO_SUB_IF(wdev);
 115         int ret;
 116
 117         mutex_lock(&sdata->local->chanctx_mtx);
 118         ret = ieee80211_check_combinations(sdata, NULL, 0, 0);
 119         mutex_unlock(&sdata->local->chanctx_mtx);
 120         if (ret < 0)
 121                 return ret;
 122
 123         return ieee80211_do_open(wdev, true);
 124 }
 125
 126 static void ieee80211_stop_p2p_device(struct wiphy *wiphy,
 127                                       struct wireless_dev *wdev)
 128 {
 129         ieee80211_sdata_stop(IEEE80211_WDEV_TO_SUB_IF(wdev));
 130 }
 131
 132 static int ieee80211_set_noack_map(struct wiphy *wiphy,
 133                                   struct net_device *dev,
 134                                   u16 noack_map)
 135 {
 136         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 137
 138         sdata->noack_map = noack_map;
 139
 140         ieee80211_check_fast_xmit_iface(sdata);
 141
 142         return 0;
 143 }
 144
 145 static int ieee80211_add_key(struct wiphy *wiphy, struct net_device *dev,
 146                              u8 key_idx, bool pairwise, const u8 *mac_addr,
 147                              struct key_params *params)
 148 {
 149         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 150         struct ieee80211_local *local = sdata->local;
 151         struct sta_info *sta = NULL;
 152         const struct ieee80211_cipher_scheme *cs = NULL;
 153         struct ieee80211_key *key;
 154         int err;
 155
 156         if (!ieee80211_sdata_running(sdata))
 157                 return -ENETDOWN;
 158
 159         /* reject WEP and TKIP keys if WEP failed to initialize */
 160         switch (params->cipher) {
 161         case WLAN_CIPHER_SUITE_WEP40:
 162         case WLAN_CIPHER_SUITE_TKIP:
 163         case WLAN_CIPHER_SUITE_WEP104:
 164                 if (IS_ERR(local->wep_tx_tfm))
 165                         return -EINVAL;
 166                 break;
 167         case WLAN_CIPHER_SUITE_CCMP:
 168         case WLAN_CIPHER_SUITE_CCMP_256:
 169         case WLAN_CIPHER_SUITE_AES_CMAC:
 170         case WLAN_CIPHER_SUITE_BIP_CMAC_256:
 171         case WLAN_CIPHER_SUITE_BIP_GMAC_128:
 172         case WLAN_CIPHER_SUITE_BIP_GMAC_256:
 173         case WLAN_CIPHER_SUITE_GCMP:
 174         case WLAN_CIPHER_SUITE_GCMP_256:
 175                 break;
 176         default:
 177                 cs = ieee80211_cs_get(local, params->cipher, sdata->vif.type);
 178                 break;
 179         }
 180
 181         key = ieee80211_key_alloc(params->cipher, key_idx, params->key_len,
 182                                   params->key, params->seq_len, params->seq,
 183                                   cs);
 184         if (IS_ERR(key))
 185                 return PTR_ERR(key);
 186
 187         if (pairwise)
 188                 key->conf.flags |= IEEE80211_KEY_FLAG_PAIRWISE;
 189
 190         mutex_lock(&local->sta_mtx);
 191
 192         if (mac_addr) {
 193                 if (ieee80211_vif_is_mesh(&sdata->vif))
 194                         sta = sta_info_get(sdata, mac_addr);
 195                 else
 196                         sta = sta_info_get_bss(sdata, mac_addr);
 197                 /*
 198                  * The ASSOC test makes sure the driver is ready to
 199                  * receive the key. When wpa_supplicant has roamed
 200                  * using FT, it attempts to set the key before
 201                  * association has completed, this rejects that attempt
 202                  * so it will set the key again after association.
 203                  *
 204                  * TODO: accept the key if we have a station entry and
 205                  *       add it to the device after the station.
 206                  */
 207                 if (!sta || !test_sta_flag(sta, WLAN_STA_ASSOC)) {
 208                         ieee80211_key_free_unused(key);
 209                         err = -ENOENT;
 210                         goto out_unlock;
 211                 }
 212         }
 213
 214         switch (sdata->vif.type) {
 215         case NL80211_IFTYPE_STATION:
 216                 if (sdata->u.mgd.mfp != IEEE80211_MFP_DISABLED)
 217                         key->conf.flags |= IEEE80211_KEY_FLAG_RX_MGMT;
 218                 break;
 219         case NL80211_IFTYPE_AP:
 220         case NL80211_IFTYPE_AP_VLAN:
 221                 /* Keys without a station are used for TX only */
 222                 if (key->sta && test_sta_flag(key->sta, WLAN_STA_MFP))
 223                         key->conf.flags |= IEEE80211_KEY_FLAG_RX_MGMT;
 224                 break;
 225         case NL80211_IFTYPE_ADHOC:
 226                 /* no MFP (yet) */
 227                 break;
 228         case NL80211_IFTYPE_MESH_POINT:
 229 #ifdef CONFIG_MAC80211_MESH
 230                 if (sdata->u.mesh.security != IEEE80211_MESH_SEC_NONE)
 231                         key->conf.flags |= IEEE80211_KEY_FLAG_RX_MGMT;
 232                 break;
 233 #endif
 234         case NL80211_IFTYPE_WDS:
 235         case NL80211_IFTYPE_MONITOR:
 236         case NL80211_IFTYPE_P2P_DEVICE:
 237         case NL80211_IFTYPE_UNSPECIFIED:
 238         case NUM_NL80211_IFTYPES:
 239         case NL80211_IFTYPE_P2P_CLIENT:
 240         case NL80211_IFTYPE_P2P_GO:
 241         case NL80211_IFTYPE_OCB:
 242                 /* shouldn't happen */
 243                 WARN_ON_ONCE(1);
 244                 break;
 245         }
 246
 247         if (sta)
 248                 sta->cipher_scheme = cs;
 249
 250         err = ieee80211_key_link(key, sdata, sta);
 251
 252  out_unlock:
 253         mutex_unlock(&local->sta_mtx);
 254
 255         return err;
 256 }
 257
 258 static int ieee80211_del_key(struct wiphy *wiphy, struct net_device *dev,
 259                              u8 key_idx, bool pairwise, const u8 *mac_addr)
 260 {
 261         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 262         struct ieee80211_local *local = sdata->local;
 263         struct sta_info *sta;
 264         struct ieee80211_key *key = NULL;
 265         int ret;
 266
 267         mutex_lock(&local->sta_mtx);
 268         mutex_lock(&local->key_mtx);
 269
 270         if (mac_addr) {
 271                 ret = -ENOENT;
 272
 273                 sta = sta_info_get_bss(sdata, mac_addr);
 274                 if (!sta)
 275                         goto out_unlock;
 276
 277                 if (pairwise)
 278                         key = key_mtx_dereference(local, sta->ptk[key_idx]);
 279                 else
 280                         key = key_mtx_dereference(local, sta->gtk[key_idx]);
 281         } else
 282                 key = key_mtx_dereference(local, sdata->keys[key_idx]);
 283
 284         if (!key) {
 285                 ret = -ENOENT;
 286                 goto out_unlock;
 287         }
 288
 289         ieee80211_key_free(key, true);
 290
 291         ret = 0;
 292  out_unlock:
 293         mutex_unlock(&local->key_mtx);
 294         mutex_unlock(&local->sta_mtx);
 295
 296         return ret;
 297 }
 298
 299 static int ieee80211_get_key(struct wiphy *wiphy, struct net_device *dev,
 300                              u8 key_idx, bool pairwise, const u8 *mac_addr,
 301                              void *cookie,
 302                              void (*callback)(void *cookie,
 303                                               struct key_params *params))
 304 {
 305         struct ieee80211_sub_if_data *sdata;
 306         struct sta_info *sta = NULL;
 307         u8 seq[6] = {0};
 308         struct key_params params;
 309         struct ieee80211_key *key = NULL;
 310         u64 pn64;
 311         u32 iv32;
 312         u16 iv16;
 313         int err = -ENOENT;
 314         struct ieee80211_key_seq kseq = {};
 315
 316         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 317
 318         rcu_read_lock();
 319
 320         if (mac_addr) {
 321                 sta = sta_info_get_bss(sdata, mac_addr);
 322                 if (!sta)
 323                         goto out;
 324
 325                 if (pairwise && key_idx < NUM_DEFAULT_KEYS)
 326                         key = rcu_dereference(sta->ptk[key_idx]);
 327                 else if (!pairwise &&
 328                          key_idx < NUM_DEFAULT_KEYS + NUM_DEFAULT_MGMT_KEYS)
 329                         key = rcu_dereference(sta->gtk[key_idx]);
 330         } else
 331                 key = rcu_dereference(sdata->keys[key_idx]);
 332
 333         if (!key)
 334                 goto out;
 335
 336         memset(&params, 0, sizeof(params));
 337
 338         params.cipher = key->conf.cipher;
 339
 340         switch (key->conf.cipher) {
 341         case WLAN_CIPHER_SUITE_TKIP:
 342                 iv32 = key->u.tkip.tx.iv32;
 343                 iv16 = key->u.tkip.tx.iv16;
 344
 345                 if (key->flags & KEY_FLAG_UPLOADED_TO_HARDWARE &&
 346                     !(key->conf.flags & IEEE80211_KEY_FLAG_GENERATE_IV)) {
 347                         drv_get_key_seq(sdata->local, key, &kseq);
 348                         iv32 = kseq.tkip.iv32;
 349                         iv16 = kseq.tkip.iv16;
 350                 }
 351
 352                 seq[0] = iv16 & 0xff;
 353                 seq[1] = (iv16 >> 8) & 0xff;
 354                 seq[2] = iv32 & 0xff;
 355                 seq[3] = (iv32 >> 8) & 0xff;
 356                 seq[4] = (iv32 >> 16) & 0xff;
 357                 seq[5] = (iv32 >> 24) & 0xff;
 358                 params.seq = seq;
 359                 params.seq_len = 6;
 360                 break;
 361         case WLAN_CIPHER_SUITE_CCMP:
 362         case WLAN_CIPHER_SUITE_CCMP_256:
 363         case WLAN_CIPHER_SUITE_AES_CMAC:
 364         case WLAN_CIPHER_SUITE_BIP_CMAC_256:
 365                 BUILD_BUG_ON(offsetof(typeof(kseq), ccmp) !=
 366                              offsetof(typeof(kseq), aes_cmac));
 367         case WLAN_CIPHER_SUITE_BIP_GMAC_128:
 368         case WLAN_CIPHER_SUITE_BIP_GMAC_256:
 369                 BUILD_BUG_ON(offsetof(typeof(kseq), ccmp) !=
 370                              offsetof(typeof(kseq), aes_gmac));
 371         case WLAN_CIPHER_SUITE_GCMP:
 372         case WLAN_CIPHER_SUITE_GCMP_256:
 373                 BUILD_BUG_ON(offsetof(typeof(kseq), ccmp) !=
 374                              offsetof(typeof(kseq), gcmp));
 375
 376                 if (key->flags & KEY_FLAG_UPLOADED_TO_HARDWARE &&
 377                     !(key->conf.flags & IEEE80211_KEY_FLAG_GENERATE_IV)) {
 378                         drv_get_key_seq(sdata->local, key, &kseq);
 379                         memcpy(seq, kseq.ccmp.pn, 6);
 380                 } else {
 381                         pn64 = atomic64_read(&key->conf.tx_pn);
 382                         seq[0] = pn64;
 383                         seq[1] = pn64 >> 8;
 384                         seq[2] = pn64 >> 16;
 385                         seq[3] = pn64 >> 24;
 386                         seq[4] = pn64 >> 32;
 387                         seq[5] = pn64 >> 40;
 388                 }
 389                 params.seq = seq;
 390                 params.seq_len = 6;
 391                 break;
 392         default:
 393                 if (!(key->flags & KEY_FLAG_UPLOADED_TO_HARDWARE))
 394                         break;
 395                 if (WARN_ON(key->conf.flags & IEEE80211_KEY_FLAG_GENERATE_IV))
 396                         break;
 397                 drv_get_key_seq(sdata->local, key, &kseq);
 398                 params.seq = kseq.hw.seq;
 399                 params.seq_len = kseq.hw.seq_len;
 400                 break;
 401         }
 402
 403         params.key = key->conf.key;
 404         params.key_len = key->conf.keylen;
 405
 406         callback(cookie, &params);
 407         err = 0;
 408
 409  out:
 410         rcu_read_unlock();
 411         return err;
 412 }
 413
 414 static int ieee80211_config_default_key(struct wiphy *wiphy,
 415                                         struct net_device *dev,
 416                                         u8 key_idx, bool uni,
 417                                         bool multi)
 418 {
 419         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 420
 421         ieee80211_set_default_key(sdata, key_idx, uni, multi);
 422
 423         return 0;
 424 }
 425
 426 static int ieee80211_config_default_mgmt_key(struct wiphy *wiphy,
 427                                              struct net_device *dev,
 428                                              u8 key_idx)
 429 {
 430         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 431
 432         ieee80211_set_default_mgmt_key(sdata, key_idx);
 433
 434         return 0;
 435 }
 436
 437 void sta_set_rate_info_tx(struct sta_info *sta,
 438                           const struct ieee80211_tx_rate *rate,
 439                           struct rate_info *rinfo)
 440 {
 441         rinfo->flags = 0;
 442         if (rate->flags & IEEE80211_TX_RC_MCS) {
 443                 rinfo->flags |= RATE_INFO_FLAGS_MCS;
 444                 rinfo->mcs = rate->idx;
 445         } else if (rate->flags & IEEE80211_TX_RC_VHT_MCS) {
 446                 rinfo->flags |= RATE_INFO_FLAGS_VHT_MCS;
 447                 rinfo->mcs = ieee80211_rate_get_vht_mcs(rate);
 448                 rinfo->nss = ieee80211_rate_get_vht_nss(rate);
 449         } else {
 450                 struct ieee80211_supported_band *sband;
 451                 int shift = ieee80211_vif_get_shift(&sta->sdata->vif);
 452                 u16 brate;
 453
 454                 sband = sta->local->hw.wiphy->bands[
 455                                 ieee80211_get_sdata_band(sta->sdata)];
 456                 brate = sband->bitrates[rate->idx].bitrate;
 457                 rinfo->legacy = DIV_ROUND_UP(brate, 1 << shift);
 458         }
 459         if (rate->flags & IEEE80211_TX_RC_40_MHZ_WIDTH)
 460                 rinfo->bw = RATE_INFO_BW_40;
 461         else if (rate->flags & IEEE80211_TX_RC_80_MHZ_WIDTH)
 462                 rinfo->bw = RATE_INFO_BW_80;
 463         else if (rate->flags & IEEE80211_TX_RC_160_MHZ_WIDTH)
 464                 rinfo->bw = RATE_INFO_BW_160;
 465         else
 466                 rinfo->bw = RATE_INFO_BW_20;
 467         if (rate->flags & IEEE80211_TX_RC_SHORT_GI)
 468                 rinfo->flags |= RATE_INFO_FLAGS_SHORT_GI;
 469 }
 470
 471 static int ieee80211_dump_station(struct wiphy *wiphy, struct net_device *dev,
 472                                   int idx, u8 *mac, struct station_info *sinfo)
 473 {
 474         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 475         struct ieee80211_local *local = sdata->local;
 476         struct sta_info *sta;
 477         int ret = -ENOENT;
 478
 479         mutex_lock(&local->sta_mtx);
 480
 481         sta = sta_info_get_by_idx(sdata, idx);
 482         if (sta) {
 483                 ret = 0;
 484                 memcpy(mac, sta->sta.addr, ETH_ALEN);
 485                 sta_set_sinfo(sta, sinfo);
 486         }
 487
 488         mutex_unlock(&local->sta_mtx);
 489
 490         return ret;
 491 }
 492
 493 static int ieee80211_dump_survey(struct wiphy *wiphy, struct net_device *dev,
 494                                  int idx, struct survey_info *survey)
 495 {
 496         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
 497
 498         return drv_get_survey(local, idx, survey);
 499 }
 500
 501 static int ieee80211_get_station(struct wiphy *wiphy, struct net_device *dev,
 502                                  const u8 *mac, struct station_info *sinfo)
 503 {
 504         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 505         struct ieee80211_local *local = sdata->local;
 506         struct sta_info *sta;
 507         int ret = -ENOENT;
 508
 509         mutex_lock(&local->sta_mtx);
 510
 511         sta = sta_info_get_bss(sdata, mac);
 512         if (sta) {
 513                 ret = 0;
 514                 sta_set_sinfo(sta, sinfo);
 515         }
 516
 517         mutex_unlock(&local->sta_mtx);
 518
 519         return ret;
 520 }
 521
 522 static int ieee80211_set_monitor_channel(struct wiphy *wiphy,
 523                                          struct cfg80211_chan_def *chandef)
 524 {
 525         struct ieee80211_local *local = wiphy_priv(wiphy);
 526         struct ieee80211_sub_if_data *sdata;
 527         int ret = 0;
 528
 529         if (cfg80211_chandef_identical(&local->monitor_chandef, chandef))
 530                 return 0;
 531
 532         mutex_lock(&local->mtx);
 533         mutex_lock(&local->iflist_mtx);
 534         if (local->use_chanctx) {
 535                 sdata = rcu_dereference_protected(
 536                                 local->monitor_sdata,
 537                                 lockdep_is_held(&local->iflist_mtx));
 538                 if (sdata) {
 539                         ieee80211_vif_release_channel(sdata);
 540                         ret = ieee80211_vif_use_channel(sdata, chandef,
 541                                         IEEE80211_CHANCTX_EXCLUSIVE);
 542                 }
 543         } else if (local->open_count == local->monitors) {
 544                 local->_oper_chandef = *chandef;
 545                 ieee80211_hw_config(local, 0);
 546         }
 547
 548         if (ret == 0)
 549                 local->monitor_chandef = *chandef;
 550         mutex_unlock(&local->iflist_mtx);
 551         mutex_unlock(&local->mtx);
 552
 553         return ret;
 554 }
 555
 556 static int ieee80211_set_probe_resp(struct ieee80211_sub_if_data *sdata,
 557                                     const u8 *resp, size_t resp_len,
 558                                     const struct ieee80211_csa_settings *csa)
 559 {
 560         struct probe_resp *new, *old;
 561
 562         if (!resp || !resp_len)
 563                 return 1;
 564
 565         old = sdata_dereference(sdata->u.ap.probe_resp, sdata);
 566
 567         new = kzalloc(sizeof(struct probe_resp) + resp_len, GFP_KERNEL);
 568         if (!new)
 569                 return -ENOMEM;
 570
 571         new->len = resp_len;
 572         memcpy(new->data, resp, resp_len);
 573
 574         if (csa)
 575                 memcpy(new->csa_counter_offsets, csa->counter_offsets_presp,
 576                        csa->n_counter_offsets_presp *
 577                        sizeof(new->csa_counter_offsets[0]));
 578
 579         rcu_assign_pointer(sdata->u.ap.probe_resp, new);
 580         if (old)
 581                 kfree_rcu(old, rcu_head);
 582
 583         return 0;
 584 }
 585
 586 static int ieee80211_assign_beacon(struct ieee80211_sub_if_data *sdata,
 587                                    struct cfg80211_beacon_data *params,
 588                                    const struct ieee80211_csa_settings *csa)
 589 {
 590         struct beacon_data *new, *old;
 591         int new_head_len, new_tail_len;
 592         int size, err;
 593         u32 changed = BSS_CHANGED_BEACON;
 594
 595         old = sdata_dereference(sdata->u.ap.beacon, sdata);
 596
 597
 598         /* Need to have a beacon head if we don't have one yet */
 599         if (!params->head && !old)
 600                 return -EINVAL;
 601
 602         /* new or old head? */
 603         if (params->head)
 604                 new_head_len = params->head_len;
 605         else
 606                 new_head_len = old->head_len;
 607
 608         /* new or old tail? */
 609         if (params->tail || !old)
 610                 /* params->tail_len will be zero for !params->tail */
 611                 new_tail_len = params->tail_len;
 612         else
 613                 new_tail_len = old->tail_len;
 614
 615         size = sizeof(*new) + new_head_len + new_tail_len;
 616
 617         new = kzalloc(size, GFP_KERNEL);
 618         if (!new)
 619                 return -ENOMEM;
 620
 621         /* start filling the new info now */
 622
 623         /*
 624          * pointers go into the block we allocated,
 625          * memory is | beacon_data | head | tail |
 626          */
 627         new->head = ((u8 *) new) + sizeof(*new);
 628         new->tail = new->head + new_head_len;
 629         new->head_len = new_head_len;
 630         new->tail_len = new_tail_len;
 631
 632         if (csa) {
 633                 new->csa_current_counter = csa->count;
 634                 memcpy(new->csa_counter_offsets, csa->counter_offsets_beacon,
 635                        csa->n_counter_offsets_beacon *
 636                        sizeof(new->csa_counter_offsets[0]));
 637         }
 638
 639         /* copy in head */
 640         if (params->head)
 641                 memcpy(new->head, params->head, new_head_len);
 642         else
 643                 memcpy(new->head, old->head, new_head_len);
 644
 645         /* copy in optional tail */
 646         if (params->tail)
 647                 memcpy(new->tail, params->tail, new_tail_len);
 648         else
 649                 if (old)
 650                         memcpy(new->tail, old->tail, new_tail_len);
 651
 652         err = ieee80211_set_probe_resp(sdata, params->probe_resp,
 653                                        params->probe_resp_len, csa);
 654         if (err < 0)
 655                 return err;
 656         if (err == 0)
 657                 changed |= BSS_CHANGED_AP_PROBE_RESP;
 658
 659         rcu_assign_pointer(sdata->u.ap.beacon, new);
 660
 661         if (old)
 662                 kfree_rcu(old, rcu_head);
 663
 664         return changed;
 665 }
 666
 667 static int ieee80211_start_ap(struct wiphy *wiphy, struct net_device *dev,
 668                               struct cfg80211_ap_settings *params)
 669 {
 670         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 671         struct ieee80211_local *local = sdata->local;
 672         struct beacon_data *old;
 673         struct ieee80211_sub_if_data *vlan;
 674         u32 changed = BSS_CHANGED_BEACON_INT |
 675                       BSS_CHANGED_BEACON_ENABLED |
 676                       BSS_CHANGED_BEACON |
 677                       BSS_CHANGED_SSID |
 678                       BSS_CHANGED_P2P_PS |
 679                       BSS_CHANGED_TXPOWER;
 680         int err;
 681
 682         old = sdata_dereference(sdata->u.ap.beacon, sdata);
 683         if (old)
 684                 return -EALREADY;
 685
 686         switch (params->smps_mode) {
 687         case NL80211_SMPS_OFF:
 688                 sdata->smps_mode = IEEE80211_SMPS_OFF;
 689                 break;
 690         case NL80211_SMPS_STATIC:
 691                 sdata->smps_mode = IEEE80211_SMPS_STATIC;
 692                 break;
 693         case NL80211_SMPS_DYNAMIC:
 694                 sdata->smps_mode = IEEE80211_SMPS_DYNAMIC;
 695                 break;
 696         default:
 697                 return -EINVAL;
 698         }
 699         sdata->needed_rx_chains = sdata->local->rx_chains;
 700
 701         mutex_lock(&local->mtx);
 702         err = ieee80211_vif_use_channel(sdata, &params->chandef,
 703                                         IEEE80211_CHANCTX_SHARED);
 704         if (!err)
 705                 ieee80211_vif_copy_chanctx_to_vlans(sdata, false);
 706         mutex_unlock(&local->mtx);
 707         if (err)
 708                 return err;
 709
 710         /*
 711          * Apply control port protocol, this allows us to
 712          * not encrypt dynamic WEP control frames.
 713          */
 714         sdata->control_port_protocol = params->crypto.control_port_ethertype;
 715         sdata->control_port_no_encrypt = params->crypto.control_port_no_encrypt;
 716         sdata->encrypt_headroom = ieee80211_cs_headroom(sdata->local,
 717                                                         &params->crypto,
 718                                                         sdata->vif.type);
 719
 720         list_for_each_entry(vlan, &sdata->u.ap.vlans, u.vlan.list) {
 721                 vlan->control_port_protocol =
 722                         params->crypto.control_port_ethertype;
 723                 vlan->control_port_no_encrypt =
 724                         params->crypto.control_port_no_encrypt;
 725                 vlan->encrypt_headroom =
 726                         ieee80211_cs_headroom(sdata->local,
 727                                               &params->crypto,
 728                                               vlan->vif.type);
 729         }
 730
 731         sdata->vif.bss_conf.beacon_int = params->beacon_interval;
 732         sdata->vif.bss_conf.dtim_period = params->dtim_period;
 733         sdata->vif.bss_conf.enable_beacon = true;
 734
 735         sdata->vif.bss_conf.ssid_len = params->ssid_len;
 736         if (params->ssid_len)
 737                 memcpy(sdata->vif.bss_conf.ssid, params->ssid,
 738                        params->ssid_len);
 739         sdata->vif.bss_conf.hidden_ssid =
 740                 (params->hidden_ssid != NL80211_HIDDEN_SSID_NOT_IN_USE);
 741
 742         memset(&sdata->vif.bss_conf.p2p_noa_attr, 0,
 743                sizeof(sdata->vif.bss_conf.p2p_noa_attr));
 744         sdata->vif.bss_conf.p2p_noa_attr.oppps_ctwindow =
 745                 params->p2p_ctwindow & IEEE80211_P2P_OPPPS_CTWINDOW_MASK;
 746         if (params->p2p_opp_ps)
 747                 sdata->vif.bss_conf.p2p_noa_attr.oppps_ctwindow |=
 748                                         IEEE80211_P2P_OPPPS_ENABLE_BIT;
 749
 750         err = ieee80211_assign_beacon(sdata, &params->beacon, NULL);
 751         if (err < 0) {
 752                 ieee80211_vif_release_channel(sdata);
 753                 return err;
 754         }
 755         changed |= err;
 756
 757         err = drv_start_ap(sdata->local, sdata);
 758         if (err) {
 759                 old = sdata_dereference(sdata->u.ap.beacon, sdata);
 760
 761                 if (old)
 762                         kfree_rcu(old, rcu_head);
 763                 RCU_INIT_POINTER(sdata->u.ap.beacon, NULL);
 764                 ieee80211_vif_release_channel(sdata);
 765                 return err;
 766         }
 767
 768         ieee80211_recalc_dtim(local, sdata);
 769         ieee80211_bss_info_change_notify(sdata, changed);
 770
 771         netif_carrier_on(dev);
 772         list_for_each_entry(vlan, &sdata->u.ap.vlans, u.vlan.list)
 773                 netif_carrier_on(vlan->dev);
 774
 775         return 0;
 776 }
 777
 778 static int ieee80211_change_beacon(struct wiphy *wiphy, struct net_device *dev,
 779                                    struct cfg80211_beacon_data *params)
 780 {
 781         struct ieee80211_sub_if_data *sdata;
 782         struct beacon_data *old;
 783         int err;
 784
 785         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 786         sdata_assert_lock(sdata);
 787
 788         /* don't allow changing the beacon while CSA is in place - offset
 789          * of channel switch counter may change
 790          */
 791         if (sdata->vif.csa_active)
 792                 return -EBUSY;
 793
 794         old = sdata_dereference(sdata->u.ap.beacon, sdata);
 795         if (!old)
 796                 return -ENOENT;
 797
 798         err = ieee80211_assign_beacon(sdata, params, NULL);
 799         if (err < 0)
 800                 return err;
 801         ieee80211_bss_info_change_notify(sdata, err);
 802         return 0;
 803 }
 804
 805 static int ieee80211_stop_ap(struct wiphy *wiphy, struct net_device *dev)
 806 {
 807         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 808         struct ieee80211_sub_if_data *vlan;
 809         struct ieee80211_local *local = sdata->local;
 810         struct beacon_data *old_beacon;
 811         struct probe_resp *old_probe_resp;
 812         struct cfg80211_chan_def chandef;
 813
 814         sdata_assert_lock(sdata);
 815
 816         old_beacon = sdata_dereference(sdata->u.ap.beacon, sdata);
 817         if (!old_beacon)
 818                 return -ENOENT;
 819         old_probe_resp = sdata_dereference(sdata->u.ap.probe_resp, sdata);
 820
 821         /* abort any running channel switch */
 822         mutex_lock(&local->mtx);
 823         sdata->vif.csa_active = false;
 824         if (sdata->csa_block_tx) {
 825                 ieee80211_wake_vif_queues(local, sdata,
 826                                           IEEE80211_QUEUE_STOP_REASON_CSA);
 827                 sdata->csa_block_tx = false;
 828         }
 829
 830         mutex_unlock(&local->mtx);
 831
 832         kfree(sdata->u.ap.next_beacon);
 833         sdata->u.ap.next_beacon = NULL;
 834
 835         /* turn off carrier for this interface and dependent VLANs */
 836         list_for_each_entry(vlan, &sdata->u.ap.vlans, u.vlan.list)
 837                 netif_carrier_off(vlan->dev);
 838         netif_carrier_off(dev);
 839
 840         /* remove beacon and probe response */
 841         RCU_INIT_POINTER(sdata->u.ap.beacon, NULL);
 842         RCU_INIT_POINTER(sdata->u.ap.probe_resp, NULL);
 843         kfree_rcu(old_beacon, rcu_head);
 844         if (old_probe_resp)
 845                 kfree_rcu(old_probe_resp, rcu_head);
 846         sdata->u.ap.driver_smps_mode = IEEE80211_SMPS_OFF;
 847
 848         __sta_info_flush(sdata, true);
 849         ieee80211_free_keys(sdata, true);
 850
 851         sdata->vif.bss_conf.enable_beacon = false;
 852         sdata->vif.bss_conf.ssid_len = 0;
 853         clear_bit(SDATA_STATE_OFFCHANNEL_BEACON_STOPPED, &sdata->state);
 854         ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BEACON_ENABLED);
 855
 856         if (sdata->wdev.cac_started) {
 857                 chandef = sdata->vif.bss_conf.chandef;
 858                 cancel_delayed_work_sync(&sdata->dfs_cac_timer_work);
 859                 cfg80211_cac_event(sdata->dev, &chandef,
 860                                    NL80211_RADAR_CAC_ABORTED,
 861                                    GFP_KERNEL);
 862         }
 863
 864         drv_stop_ap(sdata->local, sdata);
 865
 866         /* free all potentially still buffered bcast frames */
 867         local->total_ps_buffered -= skb_queue_len(&sdata->u.ap.ps.bc_buf);
 868         skb_queue_purge(&sdata->u.ap.ps.bc_buf);
 869
 870         mutex_lock(&local->mtx);
 871         ieee80211_vif_copy_chanctx_to_vlans(sdata, true);
 872         ieee80211_vif_release_channel(sdata);
 873         mutex_unlock(&local->mtx);
 874
 875         return 0;
 876 }
 877
 878 /* Layer 2 Update frame (802.2 Type 1 LLC XID Update response) */
 879 struct iapp_layer2_update {
 880         u8 da[ETH_ALEN];        /* broadcast */
 881         u8 sa[ETH_ALEN];        /* STA addr */
 882         __be16 len;             /* 6 */
 883         u8 dsap;                /* 0 */
 884         u8 ssap;                /* 0 */
 885         u8 control;
 886         u8 xid_info[3];
 887 } __packed;
 888
 889 static void ieee80211_send_layer2_update(struct sta_info *sta)
 890 {
 891         struct iapp_layer2_update *msg;
 892         struct sk_buff *skb;
 893
 894         /* Send Level 2 Update Frame to update forwarding tables in layer 2
 895          * bridge devices */
 896
 897         skb = dev_alloc_skb(sizeof(*msg));
 898         if (!skb)
 899                 return;
 900         msg = (struct iapp_layer2_update *)skb_put(skb, sizeof(*msg));
 901
 902         /* 802.2 Type 1 Logical Link Control (LLC) Exchange Identifier (XID)
 903          * Update response frame; IEEE Std 802.2-1998, 5.4.1.2.1 */
 904
 905         eth_broadcast_addr(msg->da);
 906         memcpy(msg->sa, sta->sta.addr, ETH_ALEN);
 907         msg->len = htons(6);
 908         msg->dsap = 0;
 909         msg->ssap = 0x01;       /* NULL LSAP, CR Bit: Response */
 910         msg->control = 0xaf;    /* XID response lsb.1111F101.
 911                                  * F=0 (no poll command; unsolicited frame) */
 912         msg->xid_info[0] = 0x81;        /* XID format identifier */
 913         msg->xid_info[1] = 1;   /* LLC types/classes: Type 1 LLC */
 914         msg->xid_info[2] = 0;   /* XID sender's receive window size (RW) */
 915
 916         skb->dev = sta->sdata->dev;
 917         skb->protocol = eth_type_trans(skb, sta->sdata->dev);
 918         memset(skb->cb, 0, sizeof(skb->cb));
 919         netif_rx_ni(skb);
 920 }
 921
 922 static int sta_apply_auth_flags(struct ieee80211_local *local,
 923                                 struct sta_info *sta,
 924                                 u32 mask, u32 set)
 925 {
 926         int ret;
 927
 928         if (mask & BIT(NL80211_STA_FLAG_AUTHENTICATED) &&
 929             set & BIT(NL80211_STA_FLAG_AUTHENTICATED) &&
 930             !test_sta_flag(sta, WLAN_STA_AUTH)) {
 931                 ret = sta_info_move_state(sta, IEEE80211_STA_AUTH);
 932                 if (ret)
 933                         return ret;
 934         }
 935
 936         if (mask & BIT(NL80211_STA_FLAG_ASSOCIATED) &&
 937             set & BIT(NL80211_STA_FLAG_ASSOCIATED) &&
 938             !test_sta_flag(sta, WLAN_STA_ASSOC)) {
 939                 /*
 940                  * When peer becomes associated, init rate control as
 941                  * well. Some drivers require rate control initialized
 942                  * before drv_sta_state() is called.
 943                  */
 944                 if (!test_sta_flag(sta, WLAN_STA_RATE_CONTROL))
 945                         rate_control_rate_init(sta);
 946
 947                 ret = sta_info_move_state(sta, IEEE80211_STA_ASSOC);
 948                 if (ret)
 949                         return ret;
 950         }
 951
 952         if (mask & BIT(NL80211_STA_FLAG_AUTHORIZED)) {
 953                 if (set & BIT(NL80211_STA_FLAG_AUTHORIZED))
 954                         ret = sta_info_move_state(sta, IEEE80211_STA_AUTHORIZED);
 955                 else if (test_sta_flag(sta, WLAN_STA_AUTHORIZED))
 956                         ret = sta_info_move_state(sta, IEEE80211_STA_ASSOC);
 957                 else
 958                         ret = 0;
 959                 if (ret)
 960                         return ret;
 961         }
 962
 963         if (mask & BIT(NL80211_STA_FLAG_ASSOCIATED) &&
 964             !(set & BIT(NL80211_STA_FLAG_ASSOCIATED)) &&
 965             test_sta_flag(sta, WLAN_STA_ASSOC)) {
 966                 ret = sta_info_move_state(sta, IEEE80211_STA_AUTH);
 967                 if (ret)
 968                         return ret;
 969         }
 970
 971         if (mask & BIT(NL80211_STA_FLAG_AUTHENTICATED) &&
 972             !(set & BIT(NL80211_STA_FLAG_AUTHENTICATED)) &&
 973             test_sta_flag(sta, WLAN_STA_AUTH)) {
 974                 ret = sta_info_move_state(sta, IEEE80211_STA_NONE);
 975                 if (ret)
 976                         return ret;
 977         }
 978
 979         return 0;
 980 }
 981
 982 static void sta_apply_mesh_params(struct ieee80211_local *local,
 983                                   struct sta_info *sta,
 984                                   struct station_parameters *params)
 985 {
 986 #ifdef CONFIG_MAC80211_MESH
 987         struct ieee80211_sub_if_data *sdata = sta->sdata;
 988         u32 changed = 0;
 989
 990         if (params->sta_modify_mask & STATION_PARAM_APPLY_PLINK_STATE) {
 991                 switch (params->plink_state) {
 992                 case NL80211_PLINK_ESTAB:
 993                         if (sta->mesh->plink_state != NL80211_PLINK_ESTAB)
 994                                 changed = mesh_plink_inc_estab_count(sdata);
 995                         sta->mesh->plink_state = params->plink_state;
 996
 997                         ieee80211_mps_sta_status_update(sta);
 998                         changed |= ieee80211_mps_set_sta_local_pm(sta,
 999                                       sdata->u.mesh.mshcfg.power_mode);
1000                         break;
1001                 case NL80211_PLINK_LISTEN:
1002                 case NL80211_PLINK_BLOCKED:
1003                 case NL80211_PLINK_OPN_SNT:
1004                 case NL80211_PLINK_OPN_RCVD:
1005                 case NL80211_PLINK_CNF_RCVD:
1006                 case NL80211_PLINK_HOLDING:
1007                         if (sta->mesh->plink_state == NL80211_PLINK_ESTAB)
1008                                 changed = mesh_plink_dec_estab_count(sdata);
1009                         sta->mesh->plink_state = params->plink_state;
1010
1011                         ieee80211_mps_sta_status_update(sta);
1012                         changed |= ieee80211_mps_set_sta_local_pm(sta,
1013                                         NL80211_MESH_POWER_UNKNOWN);
1014                         break;
1015                 default:
1016                         /*  nothing  */
1017                         break;
1018                 }
1019         }
1020
1021         switch (params->plink_action) {
1022         case NL80211_PLINK_ACTION_NO_ACTION:
1023                 /* nothing */
1024                 break;
1025         case NL80211_PLINK_ACTION_OPEN:
1026                 changed |= mesh_plink_open(sta);
1027                 break;
1028         case NL80211_PLINK_ACTION_BLOCK:
1029                 changed |= mesh_plink_block(sta);
1030                 break;
1031         }
1032
1033         if (params->local_pm)
1034                 changed |= ieee80211_mps_set_sta_local_pm(sta,
1035                                                           params->local_pm);
1036
1037         ieee80211_mbss_info_change_notify(sdata, changed);
1038 #endif
1039 }
1040
1041 static int sta_apply_parameters(struct ieee80211_local *local,
1042                                 struct sta_info *sta,
1043                                 struct station_parameters *params)
1044 {
1045         int ret = 0;
1046         struct ieee80211_supported_band *sband;
1047         struct ieee80211_sub_if_data *sdata = sta->sdata;
1048         enum ieee80211_band band = ieee80211_get_sdata_band(sdata);
1049         u32 mask, set;
1050
1051         sband = local->hw.wiphy->bands[band];
1052
1053         mask = params->sta_flags_mask;
1054         set = params->sta_flags_set;
1055
1056         if (ieee80211_vif_is_mesh(&sdata->vif)) {
1057                 /*
1058                  * In mesh mode, ASSOCIATED isn't part of the nl80211
1059                  * API but must follow AUTHENTICATED for driver state.
1060                  */
1061                 if (mask & BIT(NL80211_STA_FLAG_AUTHENTICATED))
1062                         mask |= BIT(NL80211_STA_FLAG_ASSOCIATED);
1063                 if (set & BIT(NL80211_STA_FLAG_AUTHENTICATED))
1064                         set |= BIT(NL80211_STA_FLAG_ASSOCIATED);
1065         } else if (test_sta_flag(sta, WLAN_STA_TDLS_PEER)) {
1066                 /*
1067                  * TDLS -- everything follows authorized, but
1068                  * only becoming authorized is possible, not
1069                  * going back
1070                  */
1071                 if (set & BIT(NL80211_STA_FLAG_AUTHORIZED)) {
1072                         set |= BIT(NL80211_STA_FLAG_AUTHENTICATED) |
1073                                BIT(NL80211_STA_FLAG_ASSOCIATED);
1074                         mask |= BIT(NL80211_STA_FLAG_AUTHENTICATED) |
1075                                 BIT(NL80211_STA_FLAG_ASSOCIATED);
1076                 }
1077         }
1078
1079         if (mask & BIT(NL80211_STA_FLAG_WME) &&
1080             local->hw.queues >= IEEE80211_NUM_ACS)
1081                 sta->sta.wme = set & BIT(NL80211_STA_FLAG_WME);
1082
1083         /* auth flags will be set later for TDLS,
1084          * and for unassociated stations that move to assocaited */
1085         if (!test_sta_flag(sta, WLAN_STA_TDLS_PEER) &&
1086             !((mask & BIT(NL80211_STA_FLAG_ASSOCIATED)) &&
1087               (set & BIT(NL80211_STA_FLAG_ASSOCIATED)))) {
1088                 ret = sta_apply_auth_flags(local, sta, mask, set);
1089                 if (ret)
1090                         return ret;
1091         }
1092
1093         if (mask & BIT(NL80211_STA_FLAG_SHORT_PREAMBLE)) {
1094                 if (set & BIT(NL80211_STA_FLAG_SHORT_PREAMBLE))
1095                         set_sta_flag(sta, WLAN_STA_SHORT_PREAMBLE);
1096                 else
1097                         clear_sta_flag(sta, WLAN_STA_SHORT_PREAMBLE);
1098         }
1099
1100         if (mask & BIT(NL80211_STA_FLAG_MFP)) {
1101                 sta->sta.mfp = !!(set & BIT(NL80211_STA_FLAG_MFP));
1102                 if (set & BIT(NL80211_STA_FLAG_MFP))
1103                         set_sta_flag(sta, WLAN_STA_MFP);
1104                 else
1105                         clear_sta_flag(sta, WLAN_STA_MFP);
1106         }
1107
1108         if (mask & BIT(NL80211_STA_FLAG_TDLS_PEER)) {
1109                 if (set & BIT(NL80211_STA_FLAG_TDLS_PEER))
1110                         set_sta_flag(sta, WLAN_STA_TDLS_PEER);
1111                 else
1112                         clear_sta_flag(sta, WLAN_STA_TDLS_PEER);
1113         }
1114
1115         /* mark TDLS channel switch support, if the AP allows it */
1116         if (test_sta_flag(sta, WLAN_STA_TDLS_PEER) &&
1117             !sdata->u.mgd.tdls_chan_switch_prohibited &&
1118             params->ext_capab_len >= 4 &&
1119             params->ext_capab[3] & WLAN_EXT_CAPA4_TDLS_CHAN_SWITCH)
1120                 set_sta_flag(sta, WLAN_STA_TDLS_CHAN_SWITCH);
1121
1122         if (test_sta_flag(sta, WLAN_STA_TDLS_PEER) &&
1123             !sdata->u.mgd.tdls_wider_bw_prohibited &&
1124             ieee80211_hw_check(&local->hw, TDLS_WIDER_BW) &&
1125             params->ext_capab_len >= 8 &&
1126             params->ext_capab[7] & WLAN_EXT_CAPA8_TDLS_WIDE_BW_ENABLED)
1127                 set_sta_flag(sta, WLAN_STA_TDLS_WIDER_BW);
1128
1129         if (params->sta_modify_mask & STATION_PARAM_APPLY_UAPSD) {
1130                 sta->sta.uapsd_queues = params->uapsd_queues;
1131                 sta->sta.max_sp = params->max_sp;
1132         }
1133
1134         /*
1135          * cfg80211 validates this (1-2007) and allows setting the AID
1136          * only when creating a new station entry
1137          */
1138         if (params->aid)
1139                 sta->sta.aid = params->aid;
1140
1141         /*
1142          * Some of the following updates would be racy if called on an
1143          * existing station, via ieee80211_change_station(). However,
1144          * all such changes are rejected by cfg80211 except for updates
1145          * changing the supported rates on an existing but not yet used
1146          * TDLS peer.
1147          */
1148
1149         if (params->listen_interval >= 0)
1150                 sta->listen_interval = params->listen_interval;
1151
1152         if (params->supported_rates) {
1153                 ieee80211_parse_bitrates(&sdata->vif.bss_conf.chandef,
1154                                          sband, params->supported_rates,
1155                                          params->supported_rates_len,
1156                                          &sta->sta.supp_rates[band]);
1157         }
1158
1159         if (params->ht_capa)
1160                 ieee80211_ht_cap_ie_to_sta_ht_cap(sdata, sband,
1161                                                   params->ht_capa, sta);
1162
1163         if (params->vht_capa)
1164                 ieee80211_vht_cap_ie_to_sta_vht_cap(sdata, sband,
1165                                                     params->vht_capa, sta);
1166
1167         if (params->opmode_notif_used) {
1168                 /* returned value is only needed for rc update, but the
1169                  * rc isn't initialized here yet, so ignore it
1170                  */
1171                 __ieee80211_vht_handle_opmode(sdata, sta,
1172                                               params->opmode_notif, band);
1173         }
1174
1175         if (ieee80211_vif_is_mesh(&sdata->vif))
1176                 sta_apply_mesh_params(local, sta, params);
1177
1178         /* set the STA state after all sta info from usermode has been set */
1179         if (test_sta_flag(sta, WLAN_STA_TDLS_PEER) ||
1180             set & BIT(NL80211_STA_FLAG_ASSOCIATED)) {
1181                 ret = sta_apply_auth_flags(local, sta, mask, set);
1182                 if (ret)
1183                         return ret;
1184         }
1185
1186         return 0;
1187 }
1188
1189 static int ieee80211_add_station(struct wiphy *wiphy, struct net_device *dev,
1190                                  const u8 *mac,
1191                                  struct station_parameters *params)
1192 {
1193         struct ieee80211_local *local = wiphy_priv(wiphy);
1194         struct sta_info *sta;
1195         struct ieee80211_sub_if_data *sdata;
1196         int err;
1197         int layer2_update;
1198
1199         if (params->vlan) {
1200                 sdata = IEEE80211_DEV_TO_SUB_IF(params->vlan);
1201
1202                 if (sdata->vif.type != NL80211_IFTYPE_AP_VLAN &&
1203                     sdata->vif.type != NL80211_IFTYPE_AP)
1204                         return -EINVAL;
1205         } else
1206                 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1207
1208         if (ether_addr_equal(mac, sdata->vif.addr))
1209                 return -EINVAL;
1210
1211         if (is_multicast_ether_addr(mac))
1212                 return -EINVAL;
1213
1214         sta = sta_info_alloc(sdata, mac, GFP_KERNEL);
1215         if (!sta)
1216                 return -ENOMEM;
1217
1218         if (params->sta_flags_set & BIT(NL80211_STA_FLAG_TDLS_PEER))
1219                 sta->sta.tdls = true;
1220
1221         err = sta_apply_parameters(local, sta, params);
1222         if (err) {
1223                 sta_info_free(local, sta);
1224                 return err;
1225         }
1226
1227         /*
1228          * for TDLS and for unassociated station, rate control should be
1229          * initialized only when rates are known and station is marked
1230          * authorized/associated
1231          */
1232         if (!test_sta_flag(sta, WLAN_STA_TDLS_PEER) &&
1233             test_sta_flag(sta, WLAN_STA_ASSOC))
1234                 rate_control_rate_init(sta);
1235
1236         layer2_update = sdata->vif.type == NL80211_IFTYPE_AP_VLAN ||
1237                 sdata->vif.type == NL80211_IFTYPE_AP;
1238
1239         err = sta_info_insert_rcu(sta);
1240         if (err) {
1241                 rcu_read_unlock();
1242                 return err;
1243         }
1244
1245         if (layer2_update)
1246                 ieee80211_send_layer2_update(sta);
1247
1248         rcu_read_unlock();
1249
1250         return 0;
1251 }
1252
1253 static int ieee80211_del_station(struct wiphy *wiphy, struct net_device *dev,
1254                                  struct station_del_parameters *params)
1255 {
1256         struct ieee80211_sub_if_data *sdata;
1257
1258         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1259
1260         if (params->mac)
1261                 return sta_info_destroy_addr_bss(sdata, params->mac);
1262
1263         sta_info_flush(sdata);
1264         return 0;
1265 }
1266
1267 static int ieee80211_change_station(struct wiphy *wiphy,
1268                                     struct net_device *dev, const u8 *mac,
1269                                     struct station_parameters *params)
1270 {
1271         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1272         struct ieee80211_local *local = wiphy_priv(wiphy);
1273         struct sta_info *sta;
1274         struct ieee80211_sub_if_data *vlansdata;
1275         enum cfg80211_station_type statype;
1276         int err;
1277
1278         mutex_lock(&local->sta_mtx);
1279
1280         sta = sta_info_get_bss(sdata, mac);
1281         if (!sta) {
1282                 err = -ENOENT;
1283                 goto out_err;
1284         }
1285
1286         switch (sdata->vif.type) {
1287         case NL80211_IFTYPE_MESH_POINT:
1288                 if (sdata->u.mesh.user_mpm)
1289                         statype = CFG80211_STA_MESH_PEER_USER;
1290                 else
1291                         statype = CFG80211_STA_MESH_PEER_KERNEL;
1292                 break;
1293         case NL80211_IFTYPE_ADHOC:
1294                 statype = CFG80211_STA_IBSS;
1295                 break;
1296         case NL80211_IFTYPE_STATION:
1297                 if (!test_sta_flag(sta, WLAN_STA_TDLS_PEER)) {
1298                         statype = CFG80211_STA_AP_STA;
1299                         break;
1300                 }
1301                 if (test_sta_flag(sta, WLAN_STA_AUTHORIZED))
1302                         statype = CFG80211_STA_TDLS_PEER_ACTIVE;
1303                 else
1304                         statype = CFG80211_STA_TDLS_PEER_SETUP;
1305                 break;
1306         case NL80211_IFTYPE_AP:
1307         case NL80211_IFTYPE_AP_VLAN:
1308                 if (test_sta_flag(sta, WLAN_STA_ASSOC))
1309                         statype = CFG80211_STA_AP_CLIENT;
1310                 else
1311                         statype = CFG80211_STA_AP_CLIENT_UNASSOC;
1312                 break;
1313         default:
1314                 err = -EOPNOTSUPP;
1315                 goto out_err;
1316         }
1317
1318         err = cfg80211_check_station_change(wiphy, params, statype);
1319         if (err)
1320                 goto out_err;
1321
1322         if (params->vlan && params->vlan != sta->sdata->dev) {
1323                 bool prev_4addr = false;
1324                 bool new_4addr = false;
1325
1326                 vlansdata = IEEE80211_DEV_TO_SUB_IF(params->vlan);
1327
1328                 if (params->vlan->ieee80211_ptr->use_4addr) {
1329                         if (vlansdata->u.vlan.sta) {
1330                                 err = -EBUSY;
1331                                 goto out_err;
1332                         }
1333
1334                         rcu_assign_pointer(vlansdata->u.vlan.sta, sta);
1335                         new_4addr = true;
1336                 }
1337
1338                 if (sta->sdata->vif.type == NL80211_IFTYPE_AP_VLAN &&
1339                     sta->sdata->u.vlan.sta) {
1340                         RCU_INIT_POINTER(sta->sdata->u.vlan.sta, NULL);
1341                         prev_4addr = true;
1342                 }
1343
1344                 sta->sdata = vlansdata;
1345                 ieee80211_check_fast_xmit(sta);
1346
1347                 if (sta->sta_state == IEEE80211_STA_AUTHORIZED &&
1348                     prev_4addr != new_4addr) {
1349                         if (new_4addr)
1350                                 atomic_dec(&sta->sdata->bss->num_mcast_sta);
1351                         else
1352                                 atomic_inc(&sta->sdata->bss->num_mcast_sta);
1353                 }
1354
1355                 ieee80211_send_layer2_update(sta);
1356         }
1357
1358         err = sta_apply_parameters(local, sta, params);
1359         if (err)
1360                 goto out_err;
1361
1362         mutex_unlock(&local->sta_mtx);
1363
1364         if ((sdata->vif.type == NL80211_IFTYPE_AP ||
1365              sdata->vif.type == NL80211_IFTYPE_AP_VLAN) &&
1366             sta->known_smps_mode != sta->sdata->bss->req_smps &&
1367             test_sta_flag(sta, WLAN_STA_AUTHORIZED) &&
1368             sta_info_tx_streams(sta) != 1) {
1369                 ht_dbg(sta->sdata,
1370                        "%pM just authorized and MIMO capable - update SMPS\n",
1371                        sta->sta.addr);
1372                 ieee80211_send_smps_action(sta->sdata,
1373                         sta->sdata->bss->req_smps,
1374                         sta->sta.addr,
1375                         sta->sdata->vif.bss_conf.bssid);
1376         }
1377
1378         if (sdata->vif.type == NL80211_IFTYPE_STATION &&
1379             params->sta_flags_mask & BIT(NL80211_STA_FLAG_AUTHORIZED)) {
1380                 ieee80211_recalc_ps(local);
1381                 ieee80211_recalc_ps_vif(sdata);
1382         }
1383
1384         return 0;
1385 out_err:
1386         mutex_unlock(&local->sta_mtx);
1387         return err;
1388 }
1389
1390 #ifdef CONFIG_MAC80211_MESH
1391 static int ieee80211_add_mpath(struct wiphy *wiphy, struct net_device *dev,
1392                                const u8 *dst, const u8 *next_hop)
1393 {
1394         struct ieee80211_sub_if_data *sdata;
1395         struct mesh_path *mpath;
1396         struct sta_info *sta;
1397
1398         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1399
1400         rcu_read_lock();
1401         sta = sta_info_get(sdata, next_hop);
1402         if (!sta) {
1403                 rcu_read_unlock();
1404                 return -ENOENT;
1405         }
1406
1407         mpath = mesh_path_add(sdata, dst);
1408         if (IS_ERR(mpath)) {
1409                 rcu_read_unlock();
1410                 return PTR_ERR(mpath);
1411         }
1412
1413         mesh_path_fix_nexthop(mpath, sta);
1414
1415         rcu_read_unlock();
1416         return 0;
1417 }
1418
1419 static int ieee80211_del_mpath(struct wiphy *wiphy, struct net_device *dev,
1420                                const u8 *dst)
1421 {
1422         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1423
1424         if (dst)
1425                 return mesh_path_del(sdata, dst);
1426
1427         mesh_path_flush_by_iface(sdata);
1428         return 0;
1429 }
1430
1431 static int ieee80211_change_mpath(struct wiphy *wiphy, struct net_device *dev,
1432                                   const u8 *dst, const u8 *next_hop)
1433 {
1434         struct ieee80211_sub_if_data *sdata;
1435         struct mesh_path *mpath;
1436         struct sta_info *sta;
1437
1438         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1439
1440         rcu_read_lock();
1441
1442         sta = sta_info_get(sdata, next_hop);
1443         if (!sta) {
1444                 rcu_read_unlock();
1445                 return -ENOENT;
1446         }
1447
1448         mpath = mesh_path_lookup(sdata, dst);
1449         if (!mpath) {
1450                 rcu_read_unlock();
1451                 return -ENOENT;
1452         }
1453
1454         mesh_path_fix_nexthop(mpath, sta);
1455
1456         rcu_read_unlock();
1457         return 0;
1458 }
1459
1460 static void mpath_set_pinfo(struct mesh_path *mpath, u8 *next_hop,
1461                             struct mpath_info *pinfo)
1462 {
1463         struct sta_info *next_hop_sta = rcu_dereference(mpath->next_hop);
1464
1465         if (next_hop_sta)
1466                 memcpy(next_hop, next_hop_sta->sta.addr, ETH_ALEN);
1467         else
1468                 eth_zero_addr(next_hop);
1469
1470         memset(pinfo, 0, sizeof(*pinfo));
1471
1472         pinfo->generation = mesh_paths_generation;
1473
1474         pinfo->filled = MPATH_INFO_FRAME_QLEN |
1475                         MPATH_INFO_SN |
1476                         MPATH_INFO_METRIC |
1477                         MPATH_INFO_EXPTIME |
1478                         MPATH_INFO_DISCOVERY_TIMEOUT |
1479                         MPATH_INFO_DISCOVERY_RETRIES |
1480                         MPATH_INFO_FLAGS;
1481
1482         pinfo->frame_qlen = mpath->frame_queue.qlen;
1483         pinfo->sn = mpath->sn;
1484         pinfo->metric = mpath->metric;
1485         if (time_before(jiffies, mpath->exp_time))
1486                 pinfo->exptime = jiffies_to_msecs(mpath->exp_time - jiffies);
1487         pinfo->discovery_timeout =
1488                         jiffies_to_msecs(mpath->discovery_timeout);
1489         pinfo->discovery_retries = mpath->discovery_retries;
1490         if (mpath->flags & MESH_PATH_ACTIVE)
1491                 pinfo->flags |= NL80211_MPATH_FLAG_ACTIVE;
1492         if (mpath->flags & MESH_PATH_RESOLVING)
1493                 pinfo->flags |= NL80211_MPATH_FLAG_RESOLVING;
1494         if (mpath->flags & MESH_PATH_SN_VALID)
1495                 pinfo->flags |= NL80211_MPATH_FLAG_SN_VALID;
1496         if (mpath->flags & MESH_PATH_FIXED)
1497                 pinfo->flags |= NL80211_MPATH_FLAG_FIXED;
1498         if (mpath->flags & MESH_PATH_RESOLVED)
1499                 pinfo->flags |= NL80211_MPATH_FLAG_RESOLVED;
1500 }
1501
1502 static int ieee80211_get_mpath(struct wiphy *wiphy, struct net_device *dev,
1503                                u8 *dst, u8 *next_hop, struct mpath_info *pinfo)
1504
1505 {
1506         struct ieee80211_sub_if_data *sdata;
1507         struct mesh_path *mpath;
1508
1509         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1510
1511         rcu_read_lock();
1512         mpath = mesh_path_lookup(sdata, dst);
1513         if (!mpath) {
1514                 rcu_read_unlock();
1515                 return -ENOENT;
1516         }
1517         memcpy(dst, mpath->dst, ETH_ALEN);
1518         mpath_set_pinfo(mpath, next_hop, pinfo);
1519         rcu_read_unlock();
1520         return 0;
1521 }
1522
1523 static int ieee80211_dump_mpath(struct wiphy *wiphy, struct net_device *dev,
1524                                 int idx, u8 *dst, u8 *next_hop,
1525                                 struct mpath_info *pinfo)
1526 {
1527         struct ieee80211_sub_if_data *sdata;
1528         struct mesh_path *mpath;
1529
1530         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1531
1532         rcu_read_lock();
1533         mpath = mesh_path_lookup_by_idx(sdata, idx);
1534         if (!mpath) {
1535                 rcu_read_unlock();
1536                 return -ENOENT;
1537         }
1538         memcpy(dst, mpath->dst, ETH_ALEN);
1539         mpath_set_pinfo(mpath, next_hop, pinfo);
1540         rcu_read_unlock();
1541         return 0;
1542 }
1543
1544 static void mpp_set_pinfo(struct mesh_path *mpath, u8 *mpp,
1545                           struct mpath_info *pinfo)
1546 {
1547         memset(pinfo, 0, sizeof(*pinfo));
1548         memcpy(mpp, mpath->mpp, ETH_ALEN);
1549
1550         pinfo->generation = mpp_paths_generation;
1551 }
1552
1553 static int ieee80211_get_mpp(struct wiphy *wiphy, struct net_device *dev,
1554                              u8 *dst, u8 *mpp, struct mpath_info *pinfo)
1555
1556 {
1557         struct ieee80211_sub_if_data *sdata;
1558         struct mesh_path *mpath;
1559
1560         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1561
1562         rcu_read_lock();
1563         mpath = mpp_path_lookup(sdata, dst);
1564         if (!mpath) {
1565                 rcu_read_unlock();
1566                 return -ENOENT;
1567         }
1568         memcpy(dst, mpath->dst, ETH_ALEN);
1569         mpp_set_pinfo(mpath, mpp, pinfo);
1570         rcu_read_unlock();
1571         return 0;
1572 }
1573
1574 static int ieee80211_dump_mpp(struct wiphy *wiphy, struct net_device *dev,
1575                               int idx, u8 *dst, u8 *mpp,
1576                               struct mpath_info *pinfo)
1577 {
1578         struct ieee80211_sub_if_data *sdata;
1579         struct mesh_path *mpath;
1580
1581         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1582
1583         rcu_read_lock();
1584         mpath = mpp_path_lookup_by_idx(sdata, idx);
1585         if (!mpath) {
1586                 rcu_read_unlock();
1587                 return -ENOENT;
1588         }
1589         memcpy(dst, mpath->dst, ETH_ALEN);
1590         mpp_set_pinfo(mpath, mpp, pinfo);
1591         rcu_read_unlock();
1592         return 0;
1593 }
1594
1595 static int ieee80211_get_mesh_config(struct wiphy *wiphy,
1596                                 struct net_device *dev,
1597                                 struct mesh_config *conf)
1598 {
1599         struct ieee80211_sub_if_data *sdata;
1600         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1601
1602         memcpy(conf, &(sdata->u.mesh.mshcfg), sizeof(struct mesh_config));
1603         return 0;
1604 }
1605
1606 static inline bool _chg_mesh_attr(enum nl80211_meshconf_params parm, u32 mask)
1607 {
1608         return (mask >> (parm-1)) & 0x1;
1609 }
1610
1611 static int copy_mesh_setup(struct ieee80211_if_mesh *ifmsh,
1612                 const struct mesh_setup *setup)
1613 {
1614         u8 *new_ie;
1615         const u8 *old_ie;
1616         struct ieee80211_sub_if_data *sdata = container_of(ifmsh,
1617                                         struct ieee80211_sub_if_data, u.mesh);
1618
1619         /* allocate information elements */
1620         new_ie = NULL;
1621         old_ie = ifmsh->ie;
1622
1623         if (setup->ie_len) {
1624                 new_ie = kmemdup(setup->ie, setup->ie_len,
1625                                 GFP_KERNEL);
1626                 if (!new_ie)
1627                         return -ENOMEM;
1628         }
1629         ifmsh->ie_len = setup->ie_len;
1630         ifmsh->ie = new_ie;
1631         kfree(old_ie);
1632
1633         /* now copy the rest of the setup parameters */
1634         ifmsh->mesh_id_len = setup->mesh_id_len;
1635         memcpy(ifmsh->mesh_id, setup->mesh_id, ifmsh->mesh_id_len);
1636         ifmsh->mesh_sp_id = setup->sync_method;
1637         ifmsh->mesh_pp_id = setup->path_sel_proto;
1638         ifmsh->mesh_pm_id = setup->path_metric;
1639         ifmsh->user_mpm = setup->user_mpm;
1640         ifmsh->mesh_auth_id = setup->auth_id;
1641         ifmsh->security = IEEE80211_MESH_SEC_NONE;
1642         if (setup->is_authenticated)
1643                 ifmsh->security |= IEEE80211_MESH_SEC_AUTHED;
1644         if (setup->is_secure)
1645                 ifmsh->security |= IEEE80211_MESH_SEC_SECURED;
1646
1647         /* mcast rate setting in Mesh Node */
1648         memcpy(sdata->vif.bss_conf.mcast_rate, setup->mcast_rate,
1649                                                 sizeof(setup->mcast_rate));
1650         sdata->vif.bss_conf.basic_rates = setup->basic_rates;
1651
1652         sdata->vif.bss_conf.beacon_int = setup->beacon_interval;
1653         sdata->vif.bss_conf.dtim_period = setup->dtim_period;
1654
1655         return 0;
1656 }
1657
1658 static int ieee80211_update_mesh_config(struct wiphy *wiphy,
1659                                         struct net_device *dev, u32 mask,
1660                                         const struct mesh_config *nconf)
1661 {
1662         struct mesh_config *conf;
1663         struct ieee80211_sub_if_data *sdata;
1664         struct ieee80211_if_mesh *ifmsh;
1665
1666         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1667         ifmsh = &sdata->u.mesh;
1668
1669         /* Set the config options which we are interested in setting */
1670         conf = &(sdata->u.mesh.mshcfg);
1671         if (_chg_mesh_attr(NL80211_MESHCONF_RETRY_TIMEOUT, mask))
1672                 conf->dot11MeshRetryTimeout = nconf->dot11MeshRetryTimeout;
1673         if (_chg_mesh_attr(NL80211_MESHCONF_CONFIRM_TIMEOUT, mask))
1674                 conf->dot11MeshConfirmTimeout = nconf->dot11MeshConfirmTimeout;
1675         if (_chg_mesh_attr(NL80211_MESHCONF_HOLDING_TIMEOUT, mask))
1676                 conf->dot11MeshHoldingTimeout = nconf->dot11MeshHoldingTimeout;
1677         if (_chg_mesh_attr(NL80211_MESHCONF_MAX_PEER_LINKS, mask))
1678                 conf->dot11MeshMaxPeerLinks = nconf->dot11MeshMaxPeerLinks;
1679         if (_chg_mesh_attr(NL80211_MESHCONF_MAX_RETRIES, mask))
1680                 conf->dot11MeshMaxRetries = nconf->dot11MeshMaxRetries;
1681         if (_chg_mesh_attr(NL80211_MESHCONF_TTL, mask))
1682                 conf->dot11MeshTTL = nconf->dot11MeshTTL;
1683         if (_chg_mesh_attr(NL80211_MESHCONF_ELEMENT_TTL, mask))
1684                 conf->element_ttl = nconf->element_ttl;
1685         if (_chg_mesh_attr(NL80211_MESHCONF_AUTO_OPEN_PLINKS, mask)) {
1686                 if (ifmsh->user_mpm)
1687                         return -EBUSY;
1688                 conf->auto_open_plinks = nconf->auto_open_plinks;
1689         }
1690         if (_chg_mesh_attr(NL80211_MESHCONF_SYNC_OFFSET_MAX_NEIGHBOR, mask))
1691                 conf->dot11MeshNbrOffsetMaxNeighbor =
1692                         nconf->dot11MeshNbrOffsetMaxNeighbor;
1693         if (_chg_mesh_attr(NL80211_MESHCONF_HWMP_MAX_PREQ_RETRIES, mask))
1694                 conf->dot11MeshHWMPmaxPREQretries =
1695                         nconf->dot11MeshHWMPmaxPREQretries;
1696         if (_chg_mesh_attr(NL80211_MESHCONF_PATH_REFRESH_TIME, mask))
1697                 conf->path_refresh_time = nconf->path_refresh_time;
1698         if (_chg_mesh_attr(NL80211_MESHCONF_MIN_DISCOVERY_TIMEOUT, mask))
1699                 conf->min_discovery_timeout = nconf->min_discovery_timeout;
1700         if (_chg_mesh_attr(NL80211_MESHCONF_HWMP_ACTIVE_PATH_TIMEOUT, mask))
1701                 conf->dot11MeshHWMPactivePathTimeout =
1702                         nconf->dot11MeshHWMPactivePathTimeout;
1703         if (_chg_mesh_attr(NL80211_MESHCONF_HWMP_PREQ_MIN_INTERVAL, mask))
1704                 conf->dot11MeshHWMPpreqMinInterval =
1705                         nconf->dot11MeshHWMPpreqMinInterval;
1706         if (_chg_mesh_attr(NL80211_MESHCONF_HWMP_PERR_MIN_INTERVAL, mask))
1707                 conf->dot11MeshHWMPperrMinInterval =
1708                         nconf->dot11MeshHWMPperrMinInterval;
1709         if (_chg_mesh_attr(NL80211_MESHCONF_HWMP_NET_DIAM_TRVS_TIME,
1710                            mask))
1711                 conf->dot11MeshHWMPnetDiameterTraversalTime =
1712                         nconf->dot11MeshHWMPnetDiameterTraversalTime;
1713         if (_chg_mesh_attr(NL80211_MESHCONF_HWMP_ROOTMODE, mask)) {
1714                 conf->dot11MeshHWMPRootMode = nconf->dot11MeshHWMPRootMode;
1715                 ieee80211_mesh_root_setup(ifmsh);
1716         }
1717         if (_chg_mesh_attr(NL80211_MESHCONF_GATE_ANNOUNCEMENTS, mask)) {
1718                 /* our current gate announcement implementation rides on root
1719                  * announcements, so require this ifmsh to also be a root node
1720                  * */
1721                 if (nconf->dot11MeshGateAnnouncementProtocol &&
1722                     !(conf->dot11MeshHWMPRootMode > IEEE80211_ROOTMODE_ROOT)) {
1723                         conf->dot11MeshHWMPRootMode = IEEE80211_PROACTIVE_RANN;
1724                         ieee80211_mesh_root_setup(ifmsh);
1725                 }
1726                 conf->dot11MeshGateAnnouncementProtocol =
1727                         nconf->dot11MeshGateAnnouncementProtocol;
1728         }
1729         if (_chg_mesh_attr(NL80211_MESHCONF_HWMP_RANN_INTERVAL, mask))
1730                 conf->dot11MeshHWMPRannInterval =
1731                         nconf->dot11MeshHWMPRannInterval;
1732         if (_chg_mesh_attr(NL80211_MESHCONF_FORWARDING, mask))
1733                 conf->dot11MeshForwarding = nconf->dot11MeshForwarding;
1734         if (_chg_mesh_attr(NL80211_MESHCONF_RSSI_THRESHOLD, mask)) {
1735                 /* our RSSI threshold implementation is supported only for
1736                  * devices that report signal in dBm.
1737                  */
1738                 if (!ieee80211_hw_check(&sdata->local->hw, SIGNAL_DBM))
1739                         return -ENOTSUPP;
1740                 conf->rssi_threshold = nconf->rssi_threshold;
1741         }
1742         if (_chg_mesh_attr(NL80211_MESHCONF_HT_OPMODE, mask)) {
1743                 conf->ht_opmode = nconf->ht_opmode;
1744                 sdata->vif.bss_conf.ht_operation_mode = nconf->ht_opmode;
1745                 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_HT);
1746         }
1747         if (_chg_mesh_attr(NL80211_MESHCONF_HWMP_PATH_TO_ROOT_TIMEOUT, mask))
1748                 conf->dot11MeshHWMPactivePathToRootTimeout =
1749                         nconf->dot11MeshHWMPactivePathToRootTimeout;
1750         if (_chg_mesh_attr(NL80211_MESHCONF_HWMP_ROOT_INTERVAL, mask))
1751                 conf->dot11MeshHWMProotInterval =
1752                         nconf->dot11MeshHWMProotInterval;
1753         if (_chg_mesh_attr(NL80211_MESHCONF_HWMP_CONFIRMATION_INTERVAL, mask))
1754                 conf->dot11MeshHWMPconfirmationInterval =
1755                         nconf->dot11MeshHWMPconfirmationInterval;
1756         if (_chg_mesh_attr(NL80211_MESHCONF_POWER_MODE, mask)) {
1757                 conf->power_mode = nconf->power_mode;
1758                 ieee80211_mps_local_status_update(sdata);
1759         }
1760         if (_chg_mesh_attr(NL80211_MESHCONF_AWAKE_WINDOW, mask))
1761                 conf->dot11MeshAwakeWindowDuration =
1762                         nconf->dot11MeshAwakeWindowDuration;
1763         if (_chg_mesh_attr(NL80211_MESHCONF_PLINK_TIMEOUT, mask))
1764                 conf->plink_timeout = nconf->plink_timeout;
1765         ieee80211_mbss_info_change_notify(sdata, BSS_CHANGED_BEACON);
1766         return 0;
1767 }
1768
1769 static int ieee80211_join_mesh(struct wiphy *wiphy, struct net_device *dev,
1770                                const struct mesh_config *conf,
1771                                const struct mesh_setup *setup)
1772 {
1773         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1774         struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
1775         int err;
1776
1777         memcpy(&ifmsh->mshcfg, conf, sizeof(struct mesh_config));
1778         err = copy_mesh_setup(ifmsh, setup);
1779         if (err)
1780                 return err;
1781
1782         /* can mesh use other SMPS modes? */
1783         sdata->smps_mode = IEEE80211_SMPS_OFF;
1784         sdata->needed_rx_chains = sdata->local->rx_chains;
1785
1786         mutex_lock(&sdata->local->mtx);
1787         err = ieee80211_vif_use_channel(sdata, &setup->chandef,
1788                                         IEEE80211_CHANCTX_SHARED);
1789         mutex_unlock(&sdata->local->mtx);
1790         if (err)
1791                 return err;
1792
1793         return ieee80211_start_mesh(sdata);
1794 }
1795
1796 static int ieee80211_leave_mesh(struct wiphy *wiphy, struct net_device *dev)
1797 {
1798         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1799
1800         ieee80211_stop_mesh(sdata);
1801         mutex_lock(&sdata->local->mtx);
1802         ieee80211_vif_release_channel(sdata);
1803         mutex_unlock(&sdata->local->mtx);
1804
1805         return 0;
1806 }
1807 #endif
1808
1809 static int ieee80211_change_bss(struct wiphy *wiphy,
1810                                 struct net_device *dev,
1811                                 struct bss_parameters *params)
1812 {
1813         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1814         enum ieee80211_band band;
1815         u32 changed = 0;
1816
1817         if (!sdata_dereference(sdata->u.ap.beacon, sdata))
1818                 return -ENOENT;
1819
1820         band = ieee80211_get_sdata_band(sdata);
1821
1822         if (params->use_cts_prot >= 0) {
1823                 sdata->vif.bss_conf.use_cts_prot = params->use_cts_prot;
1824                 changed |= BSS_CHANGED_ERP_CTS_PROT;
1825         }
1826         if (params->use_short_preamble >= 0) {
1827                 sdata->vif.bss_conf.use_short_preamble =
1828                         params->use_short_preamble;
1829                 changed |= BSS_CHANGED_ERP_PREAMBLE;
1830         }
1831
1832         if (!sdata->vif.bss_conf.use_short_slot &&
1833             band == IEEE80211_BAND_5GHZ) {
1834                 sdata->vif.bss_conf.use_short_slot = true;
1835                 changed |= BSS_CHANGED_ERP_SLOT;
1836         }
1837
1838         if (params->use_short_slot_time >= 0) {
1839                 sdata->vif.bss_conf.use_short_slot =
1840                         params->use_short_slot_time;
1841                 changed |= BSS_CHANGED_ERP_SLOT;
1842         }
1843
1844         if (params->basic_rates) {
1845                 ieee80211_parse_bitrates(&sdata->vif.bss_conf.chandef,
1846                                          wiphy->bands[band],
1847                                          params->basic_rates,
1848                                          params->basic_rates_len,
1849                                          &sdata->vif.bss_conf.basic_rates);
1850                 changed |= BSS_CHANGED_BASIC_RATES;
1851         }
1852
1853         if (params->ap_isolate >= 0) {
1854                 if (params->ap_isolate)
1855                         sdata->flags |= IEEE80211_SDATA_DONT_BRIDGE_PACKETS;
1856                 else
1857                         sdata->flags &= ~IEEE80211_SDATA_DONT_BRIDGE_PACKETS;
1858         }
1859
1860         if (params->ht_opmode >= 0) {
1861                 sdata->vif.bss_conf.ht_operation_mode =
1862                         (u16) params->ht_opmode;
1863                 changed |= BSS_CHANGED_HT;
1864         }
1865
1866         if (params->p2p_ctwindow >= 0) {
1867                 sdata->vif.bss_conf.p2p_noa_attr.oppps_ctwindow &=
1868                                         ~IEEE80211_P2P_OPPPS_CTWINDOW_MASK;
1869                 sdata->vif.bss_conf.p2p_noa_attr.oppps_ctwindow |=
1870                         params->p2p_ctwindow & IEEE80211_P2P_OPPPS_CTWINDOW_MASK;
1871                 changed |= BSS_CHANGED_P2P_PS;
1872         }
1873
1874         if (params->p2p_opp_ps > 0) {
1875                 sdata->vif.bss_conf.p2p_noa_attr.oppps_ctwindow |=
1876                                         IEEE80211_P2P_OPPPS_ENABLE_BIT;
1877                 changed |= BSS_CHANGED_P2P_PS;
1878         } else if (params->p2p_opp_ps == 0) {
1879                 sdata->vif.bss_conf.p2p_noa_attr.oppps_ctwindow &=
1880                                         ~IEEE80211_P2P_OPPPS_ENABLE_BIT;
1881                 changed |= BSS_CHANGED_P2P_PS;
1882         }
1883
1884         ieee80211_bss_info_change_notify(sdata, changed);
1885
1886         return 0;
1887 }
1888
1889 static int ieee80211_set_txq_params(struct wiphy *wiphy,
1890                                     struct net_device *dev,
1891                                     struct ieee80211_txq_params *params)
1892 {
1893         struct ieee80211_local *local = wiphy_priv(wiphy);
1894         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1895         struct ieee80211_tx_queue_params p;
1896
1897         if (!local->ops->conf_tx)
1898                 return -EOPNOTSUPP;
1899
1900         if (local->hw.queues < IEEE80211_NUM_ACS)
1901                 return -EOPNOTSUPP;
1902
1903         memset(&p, 0, sizeof(p));
1904         p.aifs = params->aifs;
1905         p.cw_max = params->cwmax;
1906         p.cw_min = params->cwmin;
1907         p.txop = params->txop;
1908
1909         /*
1910          * Setting tx queue params disables u-apsd because it's only
1911          * called in master mode.
1912          */
1913         p.uapsd = false;
1914
1915         sdata->tx_conf[params->ac] = p;
1916         if (drv_conf_tx(local, sdata, params->ac, &p)) {
1917                 wiphy_debug(local->hw.wiphy,
1918                             "failed to set TX queue parameters for AC %d\n",
1919                             params->ac);
1920                 return -EINVAL;
1921         }
1922
1923         ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_QOS);
1924
1925         return 0;
1926 }
1927
1928 #ifdef CONFIG_PM
1929 static int ieee80211_suspend(struct wiphy *wiphy,
1930                              struct cfg80211_wowlan *wowlan)
1931 {
1932         return __ieee80211_suspend(wiphy_priv(wiphy), wowlan);
1933 }
1934
1935 static int ieee80211_resume(struct wiphy *wiphy)
1936 {
1937         return __ieee80211_resume(wiphy_priv(wiphy));
1938 }
1939 #else
1940 #define ieee80211_suspend NULL
1941 #define ieee80211_resume NULL
1942 #endif
1943
1944 static int ieee80211_scan(struct wiphy *wiphy,
1945                           struct cfg80211_scan_request *req)
1946 {
1947         struct ieee80211_sub_if_data *sdata;
1948
1949         sdata = IEEE80211_WDEV_TO_SUB_IF(req->wdev);
1950
1951         switch (ieee80211_vif_type_p2p(&sdata->vif)) {
1952         case NL80211_IFTYPE_STATION:
1953         case NL80211_IFTYPE_ADHOC:
1954         case NL80211_IFTYPE_MESH_POINT:
1955         case NL80211_IFTYPE_P2P_CLIENT:
1956         case NL80211_IFTYPE_P2P_DEVICE:
1957                 break;
1958         case NL80211_IFTYPE_P2P_GO:
1959                 if (sdata->local->ops->hw_scan)
1960                         break;
1961                 /*
1962                  * FIXME: implement NoA while scanning in software,
1963                  * for now fall through to allow scanning only when
1964                  * beaconing hasn't been configured yet
1965                  */
1966         case NL80211_IFTYPE_AP:
1967                 /*
1968                  * If the scan has been forced (and the driver supports
1969                  * forcing), don't care about being beaconing already.
1970                  * This will create problems to the attached stations (e.g. all
1971                  * the  frames sent while scanning on other channel will be
1972                  * lost)
1973                  */
1974                 if (sdata->u.ap.beacon &&
1975                     (!(wiphy->features & NL80211_FEATURE_AP_SCAN) ||
1976                      !(req->flags & NL80211_SCAN_FLAG_AP)))
1977                         return -EOPNOTSUPP;
1978                 break;
1979         default:
1980                 return -EOPNOTSUPP;
1981         }
1982
1983         return ieee80211_request_scan(sdata, req);
1984 }
1985
1986 static void ieee80211_abort_scan(struct wiphy *wiphy, struct wireless_dev *wdev)
1987 {
1988         ieee80211_scan_cancel(wiphy_priv(wiphy));
1989 }
1990
1991 static int
1992 ieee80211_sched_scan_start(struct wiphy *wiphy,
1993                            struct net_device *dev,
1994                            struct cfg80211_sched_scan_request *req)
1995 {
1996         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1997
1998         if (!sdata->local->ops->sched_scan_start)
1999                 return -EOPNOTSUPP;
2000
2001         return ieee80211_request_sched_scan_start(sdata, req);
2002 }
2003
2004 static int
2005 ieee80211_sched_scan_stop(struct wiphy *wiphy, struct net_device *dev)
2006 {
2007         struct ieee80211_local *local = wiphy_priv(wiphy);
2008
2009         if (!local->ops->sched_scan_stop)
2010                 return -EOPNOTSUPP;
2011
2012         return ieee80211_request_sched_scan_stop(local);
2013 }
2014
2015 static int ieee80211_auth(struct wiphy *wiphy, struct net_device *dev,
2016                           struct cfg80211_auth_request *req)
2017 {
2018         return ieee80211_mgd_auth(IEEE80211_DEV_TO_SUB_IF(dev), req);
2019 }
2020
2021 static int ieee80211_assoc(struct wiphy *wiphy, struct net_device *dev,
2022                            struct cfg80211_assoc_request *req)
2023 {
2024         return ieee80211_mgd_assoc(IEEE80211_DEV_TO_SUB_IF(dev), req);
2025 }
2026
2027 static int ieee80211_deauth(struct wiphy *wiphy, struct net_device *dev,
2028                             struct cfg80211_deauth_request *req)
2029 {
2030         return ieee80211_mgd_deauth(IEEE80211_DEV_TO_SUB_IF(dev), req);
2031 }
2032
2033 static int ieee80211_disassoc(struct wiphy *wiphy, struct net_device *dev,
2034                               struct cfg80211_disassoc_request *req)
2035 {
2036         return ieee80211_mgd_disassoc(IEEE80211_DEV_TO_SUB_IF(dev), req);
2037 }
2038
2039 static int ieee80211_join_ibss(struct wiphy *wiphy, struct net_device *dev,
2040                                struct cfg80211_ibss_params *params)
2041 {
2042         return ieee80211_ibss_join(IEEE80211_DEV_TO_SUB_IF(dev), params);
2043 }
2044
2045 static int ieee80211_leave_ibss(struct wiphy *wiphy, struct net_device *dev)
2046 {
2047         return ieee80211_ibss_leave(IEEE80211_DEV_TO_SUB_IF(dev));
2048 }
2049
2050 static int ieee80211_join_ocb(struct wiphy *wiphy, struct net_device *dev,
2051                               struct ocb_setup *setup)
2052 {
2053         return ieee80211_ocb_join(IEEE80211_DEV_TO_SUB_IF(dev), setup);
2054 }
2055
2056 static int ieee80211_leave_ocb(struct wiphy *wiphy, struct net_device *dev)
2057 {
2058         return ieee80211_ocb_leave(IEEE80211_DEV_TO_SUB_IF(dev));
2059 }
2060
2061 static int ieee80211_set_mcast_rate(struct wiphy *wiphy, struct net_device *dev,
2062                                     int rate[IEEE80211_NUM_BANDS])
2063 {
2064         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2065
2066         memcpy(sdata->vif.bss_conf.mcast_rate, rate,
2067                sizeof(int) * IEEE80211_NUM_BANDS);
2068
2069         return 0;
2070 }
2071
2072 static int ieee80211_set_wiphy_params(struct wiphy *wiphy, u32 changed)
2073 {
2074         struct ieee80211_local *local = wiphy_priv(wiphy);
2075         int err;
2076
2077         if (changed & WIPHY_PARAM_FRAG_THRESHOLD) {
2078                 ieee80211_check_fast_xmit_all(local);
2079
2080                 err = drv_set_frag_threshold(local, wiphy->frag_threshold);
2081
2082                 if (err) {
2083                         ieee80211_check_fast_xmit_all(local);
2084                         return err;
2085                 }
2086         }
2087
2088         if ((changed & WIPHY_PARAM_COVERAGE_CLASS) ||
2089             (changed & WIPHY_PARAM_DYN_ACK)) {
2090                 s16 coverage_class;
2091
2092                 coverage_class = changed & WIPHY_PARAM_COVERAGE_CLASS ?
2093                                         wiphy->coverage_class : -1;
2094                 err = drv_set_coverage_class(local, coverage_class);
2095
2096                 if (err)
2097                         return err;
2098         }
2099
2100         if (changed & WIPHY_PARAM_RTS_THRESHOLD) {
2101                 err = drv_set_rts_threshold(local, wiphy->rts_threshold);
2102
2103                 if (err)
2104                         return err;
2105         }
2106
2107         if (changed & WIPHY_PARAM_RETRY_SHORT) {
2108                 if (wiphy->retry_short > IEEE80211_MAX_TX_RETRY)
2109                         return -EINVAL;
2110                 local->hw.conf.short_frame_max_tx_count = wiphy->retry_short;
2111         }
2112         if (changed & WIPHY_PARAM_RETRY_LONG) {
2113                 if (wiphy->retry_long > IEEE80211_MAX_TX_RETRY)
2114                         return -EINVAL;
2115                 local->hw.conf.long_frame_max_tx_count = wiphy->retry_long;
2116         }
2117         if (changed &
2118             (WIPHY_PARAM_RETRY_SHORT | WIPHY_PARAM_RETRY_LONG))
2119                 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_RETRY_LIMITS);
2120
2121         return 0;
2122 }
2123
2124 static int ieee80211_set_tx_power(struct wiphy *wiphy,
2125                                   struct wireless_dev *wdev,
2126                                   enum nl80211_tx_power_setting type, int mbm)
2127 {
2128         struct ieee80211_local *local = wiphy_priv(wiphy);
2129         struct ieee80211_sub_if_data *sdata;
2130         enum nl80211_tx_power_setting txp_type = type;
2131         bool update_txp_type = false;
2132
2133         if (wdev) {
2134                 sdata = IEEE80211_WDEV_TO_SUB_IF(wdev);
2135
2136                 switch (type) {
2137                 case NL80211_TX_POWER_AUTOMATIC:
2138                         sdata->user_power_level = IEEE80211_UNSET_POWER_LEVEL;
2139                         txp_type = NL80211_TX_POWER_LIMITED;
2140                         break;
2141                 case NL80211_TX_POWER_LIMITED:
2142                 case NL80211_TX_POWER_FIXED:
2143                         if (mbm < 0 || (mbm % 100))
2144                                 return -EOPNOTSUPP;
2145                         sdata->user_power_level = MBM_TO_DBM(mbm);
2146                         break;
2147                 }
2148
2149                 if (txp_type != sdata->vif.bss_conf.txpower_type) {
2150                         update_txp_type = true;
2151                         sdata->vif.bss_conf.txpower_type = txp_type;
2152                 }
2153
2154                 ieee80211_recalc_txpower(sdata, update_txp_type);
2155
2156                 return 0;
2157         }
2158
2159         switch (type) {
2160         case NL80211_TX_POWER_AUTOMATIC:
2161                 local->user_power_level = IEEE80211_UNSET_POWER_LEVEL;
2162                 txp_type = NL80211_TX_POWER_LIMITED;
2163                 break;
2164         case NL80211_TX_POWER_LIMITED:
2165         case NL80211_TX_POWER_FIXED:
2166                 if (mbm < 0 || (mbm % 100))
2167                         return -EOPNOTSUPP;
2168                 local->user_power_level = MBM_TO_DBM(mbm);
2169                 break;
2170         }
2171
2172         mutex_lock(&local->iflist_mtx);
2173         list_for_each_entry(sdata, &local->interfaces, list) {
2174                 sdata->user_power_level = local->user_power_level;
2175                 if (txp_type != sdata->vif.bss_conf.txpower_type)
2176                         update_txp_type = true;
2177                 sdata->vif.bss_conf.txpower_type = txp_type;
2178         }
2179         list_for_each_entry(sdata, &local->interfaces, list)
2180                 ieee80211_recalc_txpower(sdata, update_txp_type);
2181         mutex_unlock(&local->iflist_mtx);
2182
2183         return 0;
2184 }
2185
2186 static int ieee80211_get_tx_power(struct wiphy *wiphy,
2187                                   struct wireless_dev *wdev,
2188                                   int *dbm)
2189 {
2190         struct ieee80211_local *local = wiphy_priv(wiphy);
2191         struct ieee80211_sub_if_data *sdata = IEEE80211_WDEV_TO_SUB_IF(wdev);
2192
2193         if (local->ops->get_txpower)
2194                 return drv_get_txpower(local, sdata, dbm);
2195
2196         if (!local->use_chanctx)
2197                 *dbm = local->hw.conf.power_level;
2198         else
2199                 *dbm = sdata->vif.bss_conf.txpower;
2200
2201         return 0;
2202 }
2203
2204 static int ieee80211_set_wds_peer(struct wiphy *wiphy, struct net_device *dev,
2205                                   const u8 *addr)
2206 {
2207         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2208
2209         memcpy(&sdata->u.wds.remote_addr, addr, ETH_ALEN);
2210
2211         return 0;
2212 }
2213
2214 static void ieee80211_rfkill_poll(struct wiphy *wiphy)
2215 {
2216         struct ieee80211_local *local = wiphy_priv(wiphy);
2217
2218         drv_rfkill_poll(local);
2219 }
2220
2221 #ifdef CONFIG_NL80211_TESTMODE
2222 static int ieee80211_testmode_cmd(struct wiphy *wiphy,
2223                                   struct wireless_dev *wdev,
2224                                   void *data, int len)
2225 {
2226         struct ieee80211_local *local = wiphy_priv(wiphy);
2227         struct ieee80211_vif *vif = NULL;
2228
2229         if (!local->ops->testmode_cmd)
2230                 return -EOPNOTSUPP;
2231
2232         if (wdev) {
2233                 struct ieee80211_sub_if_data *sdata;
2234
2235                 sdata = IEEE80211_WDEV_TO_SUB_IF(wdev);
2236                 if (sdata->flags & IEEE80211_SDATA_IN_DRIVER)
2237                         vif = &sdata->vif;
2238         }
2239
2240         return local->ops->testmode_cmd(&local->hw, vif, data, len);
2241 }
2242
2243 static int ieee80211_testmode_dump(struct wiphy *wiphy,
2244                                    struct sk_buff *skb,
2245                                    struct netlink_callback *cb,
2246                                    void *data, int len)
2247 {
2248         struct ieee80211_local *local = wiphy_priv(wiphy);
2249
2250         if (!local->ops->testmode_dump)
2251                 return -EOPNOTSUPP;
2252
2253         return local->ops->testmode_dump(&local->hw, skb, cb, data, len);
2254 }
2255 #endif
2256
2257 int __ieee80211_request_smps_ap(struct ieee80211_sub_if_data *sdata,
2258                                 enum ieee80211_smps_mode smps_mode)
2259 {
2260         struct sta_info *sta;
2261         enum ieee80211_smps_mode old_req;
2262
2263         if (WARN_ON_ONCE(sdata->vif.type != NL80211_IFTYPE_AP))
2264                 return -EINVAL;
2265
2266         if (sdata->vif.bss_conf.chandef.width == NL80211_CHAN_WIDTH_20_NOHT)
2267                 return 0;
2268
2269         old_req = sdata->u.ap.req_smps;
2270         sdata->u.ap.req_smps = smps_mode;
2271
2272         /* AUTOMATIC doesn't mean much for AP - don't allow it */
2273         if (old_req == smps_mode ||
2274             smps_mode == IEEE80211_SMPS_AUTOMATIC)
2275                 return 0;
2276
2277          /* If no associated stations, there's no need to do anything */
2278         if (!atomic_read(&sdata->u.ap.num_mcast_sta)) {
2279                 sdata->smps_mode = smps_mode;
2280                 ieee80211_queue_work(&sdata->local->hw, &sdata->recalc_smps);
2281                 return 0;
2282         }
2283
2284         ht_dbg(sdata,
2285                "SMPS %d requested in AP mode, sending Action frame to %d stations\n",
2286                smps_mode, atomic_read(&sdata->u.ap.num_mcast_sta));
2287
2288         mutex_lock(&sdata->local->sta_mtx);
2289         list_for_each_entry(sta, &sdata->local->sta_list, list) {
2290                 /*
2291                  * Only stations associated to our AP and
2292                  * associated VLANs
2293                  */
2294                 if (sta->sdata->bss != &sdata->u.ap)
2295                         continue;
2296
2297                 /* This station doesn't support MIMO - skip it */
2298                 if (sta_info_tx_streams(sta) == 1)
2299                         continue;
2300
2301                 /*
2302                  * Don't wake up a STA just to send the action frame
2303                  * unless we are getting more restrictive.
2304                  */
2305                 if (test_sta_flag(sta, WLAN_STA_PS_STA) &&
2306                     !ieee80211_smps_is_restrictive(sta->known_smps_mode,
2307                                                    smps_mode)) {
2308                         ht_dbg(sdata, "Won't send SMPS to sleeping STA %pM\n",
2309                                sta->sta.addr);
2310                         continue;
2311                 }
2312
2313                 /*
2314                  * If the STA is not authorized, wait until it gets
2315                  * authorized and the action frame will be sent then.
2316                  */
2317                 if (!test_sta_flag(sta, WLAN_STA_AUTHORIZED))
2318                         continue;
2319
2320                 ht_dbg(sdata, "Sending SMPS to %pM\n", sta->sta.addr);
2321                 ieee80211_send_smps_action(sdata, smps_mode, sta->sta.addr,
2322                                            sdata->vif.bss_conf.bssid);
2323         }
2324         mutex_unlock(&sdata->local->sta_mtx);
2325
2326         sdata->smps_mode = smps_mode;
2327         ieee80211_queue_work(&sdata->local->hw, &sdata->recalc_smps);
2328
2329         return 0;
2330 }
2331
2332 int __ieee80211_request_smps_mgd(struct ieee80211_sub_if_data *sdata,
2333                                  enum ieee80211_smps_mode smps_mode)
2334 {
2335         const u8 *ap;
2336         enum ieee80211_smps_mode old_req;
2337         int err;
2338         struct sta_info *sta;
2339         bool tdls_peer_found = false;
2340
2341         lockdep_assert_held(&sdata->wdev.mtx);
2342
2343         if (WARN_ON_ONCE(sdata->vif.type != NL80211_IFTYPE_STATION))
2344                 return -EINVAL;
2345
2346         old_req = sdata->u.mgd.req_smps;
2347         sdata->u.mgd.req_smps = smps_mode;
2348
2349         if (old_req == smps_mode &&
2350             smps_mode != IEEE80211_SMPS_AUTOMATIC)
2351                 return 0;
2352
2353         /*
2354          * If not associated, or current association is not an HT
2355          * association, there's no need to do anything, just store
2356          * the new value until we associate.
2357          */
2358         if (!sdata->u.mgd.associated ||
2359             sdata->vif.bss_conf.chandef.width == NL80211_CHAN_WIDTH_20_NOHT)
2360                 return 0;
2361
2362         ap = sdata->u.mgd.associated->bssid;
2363
2364         rcu_read_lock();
2365         list_for_each_entry_rcu(sta, &sdata->local->sta_list, list) {
2366                 if (!sta->sta.tdls || sta->sdata != sdata || !sta->uploaded ||
2367                     !test_sta_flag(sta, WLAN_STA_AUTHORIZED))
2368                         continue;
2369
2370                 tdls_peer_found = true;
2371                 break;
2372         }
2373         rcu_read_unlock();
2374
2375         if (smps_mode == IEEE80211_SMPS_AUTOMATIC) {
2376                 if (tdls_peer_found || !sdata->u.mgd.powersave)
2377                         smps_mode = IEEE80211_SMPS_OFF;
2378                 else
2379                         smps_mode = IEEE80211_SMPS_DYNAMIC;
2380         }
2381
2382         /* send SM PS frame to AP */
2383         err = ieee80211_send_smps_action(sdata, smps_mode,
2384                                          ap, ap);
2385         if (err)
2386                 sdata->u.mgd.req_smps = old_req;
2387         else if (smps_mode != IEEE80211_SMPS_OFF && tdls_peer_found)
2388                 ieee80211_teardown_tdls_peers(sdata);
2389
2390         return err;
2391 }
2392
2393 static int ieee80211_set_power_mgmt(struct wiphy *wiphy, struct net_device *dev,
2394                                     bool enabled, int timeout)
2395 {
2396         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2397         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2398
2399         if (sdata->vif.type != NL80211_IFTYPE_STATION)
2400                 return -EOPNOTSUPP;
2401
2402         if (!ieee80211_hw_check(&local->hw, SUPPORTS_PS))
2403                 return -EOPNOTSUPP;
2404
2405         if (enabled == sdata->u.mgd.powersave &&
2406             timeout == local->dynamic_ps_forced_timeout)
2407                 return 0;
2408
2409         sdata->u.mgd.powersave = enabled;
2410         local->dynamic_ps_forced_timeout = timeout;
2411
2412         /* no change, but if automatic follow powersave */
2413         sdata_lock(sdata);
2414         __ieee80211_request_smps_mgd(sdata, sdata->u.mgd.req_smps);
2415         sdata_unlock(sdata);
2416
2417         if (ieee80211_hw_check(&local->hw, SUPPORTS_DYNAMIC_PS))
2418                 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
2419
2420         ieee80211_recalc_ps(local);
2421         ieee80211_recalc_ps_vif(sdata);
2422
2423         return 0;
2424 }
2425
2426 static int ieee80211_set_cqm_rssi_config(struct wiphy *wiphy,
2427                                          struct net_device *dev,
2428                                          s32 rssi_thold, u32 rssi_hyst)
2429 {
2430         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2431         struct ieee80211_vif *vif = &sdata->vif;
2432         struct ieee80211_bss_conf *bss_conf = &vif->bss_conf;
2433
2434         if (rssi_thold == bss_conf->cqm_rssi_thold &&
2435             rssi_hyst == bss_conf->cqm_rssi_hyst)
2436                 return 0;
2437
2438         if (sdata->vif.driver_flags & IEEE80211_VIF_BEACON_FILTER &&
2439             !(sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI))
2440                 return -EOPNOTSUPP;
2441
2442         bss_conf->cqm_rssi_thold = rssi_thold;
2443         bss_conf->cqm_rssi_hyst = rssi_hyst;
2444         sdata->u.mgd.last_cqm_event_signal = 0;
2445
2446         /* tell the driver upon association, unless already associated */
2447         if (sdata->u.mgd.associated &&
2448             sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI)
2449                 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_CQM);
2450
2451         return 0;
2452 }
2453
2454 static int ieee80211_set_bitrate_mask(struct wiphy *wiphy,
2455                                       struct net_device *dev,
2456                                       const u8 *addr,
2457                                       const struct cfg80211_bitrate_mask *mask)
2458 {
2459         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2460         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2461         int i, ret;
2462
2463         if (!ieee80211_sdata_running(sdata))
2464                 return -ENETDOWN;
2465
2466         if (ieee80211_hw_check(&local->hw, HAS_RATE_CONTROL)) {
2467                 ret = drv_set_bitrate_mask(local, sdata, mask);
2468                 if (ret)
2469                         return ret;
2470         }
2471
2472         for (i = 0; i < IEEE80211_NUM_BANDS; i++) {
2473                 struct ieee80211_supported_band *sband = wiphy->bands[i];
2474                 int j;
2475
2476                 sdata->rc_rateidx_mask[i] = mask->control[i].legacy;
2477                 memcpy(sdata->rc_rateidx_mcs_mask[i], mask->control[i].ht_mcs,
2478                        sizeof(mask->control[i].ht_mcs));
2479                 memcpy(sdata->rc_rateidx_vht_mcs_mask[i],
2480                        mask->control[i].vht_mcs,
2481                        sizeof(mask->control[i].vht_mcs));
2482
2483                 sdata->rc_has_mcs_mask[i] = false;
2484                 sdata->rc_has_vht_mcs_mask[i] = false;
2485                 if (!sband)
2486                         continue;
2487
2488                 for (j = 0; j < IEEE80211_HT_MCS_MASK_LEN; j++) {
2489                         if (~sdata->rc_rateidx_mcs_mask[i][j]) {
2490                                 sdata->rc_has_mcs_mask[i] = true;
2491                                 break;
2492                         }
2493                 }
2494
2495                 for (j = 0; j < NL80211_VHT_NSS_MAX; j++) {
2496                         if (~sdata->rc_rateidx_vht_mcs_mask[i][j]) {
2497                                 sdata->rc_has_vht_mcs_mask[i] = true;
2498                                 break;
2499                         }
2500                 }
2501         }
2502
2503         return 0;
2504 }
2505
2506 static int ieee80211_start_radar_detection(struct wiphy *wiphy,
2507                                            struct net_device *dev,
2508                                            struct cfg80211_chan_def *chandef,
2509                                            u32 cac_time_ms)
2510 {
2511         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2512         struct ieee80211_local *local = sdata->local;
2513         int err;
2514
2515         mutex_lock(&local->mtx);
2516         if (!list_empty(&local->roc_list) || local->scanning) {
2517                 err = -EBUSY;
2518                 goto out_unlock;
2519         }
2520
2521         /* whatever, but channel contexts should not complain about that one */
2522         sdata->smps_mode = IEEE80211_SMPS_OFF;
2523         sdata->needed_rx_chains = local->rx_chains;
2524
2525         err = ieee80211_vif_use_channel(sdata, chandef,
2526                                         IEEE80211_CHANCTX_SHARED);
2527         if (err)
2528                 goto out_unlock;
2529
2530         ieee80211_queue_delayed_work(&sdata->local->hw,
2531                                      &sdata->dfs_cac_timer_work,
2532                                      msecs_to_jiffies(cac_time_ms));
2533
2534  out_unlock:
2535         mutex_unlock(&local->mtx);
2536         return err;
2537 }
2538
2539 static struct cfg80211_beacon_data *
2540 cfg80211_beacon_dup(struct cfg80211_beacon_data *beacon)
2541 {
2542         struct cfg80211_beacon_data *new_beacon;
2543         u8 *pos;
2544         int len;
2545
2546         len = beacon->head_len + beacon->tail_len + beacon->beacon_ies_len +
2547               beacon->proberesp_ies_len + beacon->assocresp_ies_len +
2548               beacon->probe_resp_len;
2549
2550         new_beacon = kzalloc(sizeof(*new_beacon) + len, GFP_KERNEL);
2551         if (!new_beacon)
2552                 return NULL;
2553
2554         pos = (u8 *)(new_beacon + 1);
2555         if (beacon->head_len) {
2556                 new_beacon->head_len = beacon->head_len;
2557                 new_beacon->head = pos;
2558                 memcpy(pos, beacon->head, beacon->head_len);
2559                 pos += beacon->head_len;
2560         }
2561         if (beacon->tail_len) {
2562                 new_beacon->tail_len = beacon->tail_len;
2563                 new_beacon->tail = pos;
2564                 memcpy(pos, beacon->tail, beacon->tail_len);
2565                 pos += beacon->tail_len;
2566         }
2567         if (beacon->beacon_ies_len) {
2568                 new_beacon->beacon_ies_len = beacon->beacon_ies_len;
2569                 new_beacon->beacon_ies = pos;
2570                 memcpy(pos, beacon->beacon_ies, beacon->beacon_ies_len);
2571                 pos += beacon->beacon_ies_len;
2572         }
2573         if (beacon->proberesp_ies_len) {
2574                 new_beacon->proberesp_ies_len = beacon->proberesp_ies_len;
2575                 new_beacon->proberesp_ies = pos;
2576                 memcpy(pos, beacon->proberesp_ies, beacon->proberesp_ies_len);
2577                 pos += beacon->proberesp_ies_len;
2578         }
2579         if (beacon->assocresp_ies_len) {
2580                 new_beacon->assocresp_ies_len = beacon->assocresp_ies_len;
2581                 new_beacon->assocresp_ies = pos;
2582                 memcpy(pos, beacon->assocresp_ies, beacon->assocresp_ies_len);
2583                 pos += beacon->assocresp_ies_len;
2584         }
2585         if (beacon->probe_resp_len) {
2586                 new_beacon->probe_resp_len = beacon->probe_resp_len;
2587                 beacon->probe_resp = pos;
2588                 memcpy(pos, beacon->probe_resp, beacon->probe_resp_len);
2589                 pos += beacon->probe_resp_len;
2590         }
2591
2592         return new_beacon;
2593 }
2594
2595 void ieee80211_csa_finish(struct ieee80211_vif *vif)
2596 {
2597         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2598
2599         ieee80211_queue_work(&sdata->local->hw,
2600                              &sdata->csa_finalize_work);
2601 }
2602 EXPORT_SYMBOL(ieee80211_csa_finish);
2603
2604 static int ieee80211_set_after_csa_beacon(struct ieee80211_sub_if_data *sdata,
2605                                           u32 *changed)
2606 {
2607         int err;
2608
2609         switch (sdata->vif.type) {
2610         case NL80211_IFTYPE_AP:
2611                 err = ieee80211_assign_beacon(sdata, sdata->u.ap.next_beacon,
2612                                               NULL);
2613                 kfree(sdata->u.ap.next_beacon);
2614                 sdata->u.ap.next_beacon = NULL;
2615
2616                 if (err < 0)
2617                         return err;
2618                 *changed |= err;
2619                 break;
2620         case NL80211_IFTYPE_ADHOC:
2621                 err = ieee80211_ibss_finish_csa(sdata);
2622                 if (err < 0)
2623                         return err;
2624                 *changed |= err;
2625                 break;
2626 #ifdef CONFIG_MAC80211_MESH
2627         case NL80211_IFTYPE_MESH_POINT:
2628                 err = ieee80211_mesh_finish_csa(sdata);
2629                 if (err < 0)
2630                         return err;
2631                 *changed |= err;
2632                 break;
2633 #endif
2634         default:
2635                 WARN_ON(1);
2636                 return -EINVAL;
2637         }
2638
2639         return 0;
2640 }
2641
2642 static int __ieee80211_csa_finalize(struct ieee80211_sub_if_data *sdata)
2643 {
2644         struct ieee80211_local *local = sdata->local;
2645         u32 changed = 0;
2646         int err;
2647
2648         sdata_assert_lock(sdata);
2649         lockdep_assert_held(&local->mtx);
2650         lockdep_assert_held(&local->chanctx_mtx);
2651
2652         /*
2653          * using reservation isn't immediate as it may be deferred until later
2654          * with multi-vif. once reservation is complete it will re-schedule the
2655          * work with no reserved_chanctx so verify chandef to check if it
2656          * completed successfully
2657          */
2658
2659         if (sdata->reserved_chanctx) {
2660                 /*
2661                  * with multi-vif csa driver may call ieee80211_csa_finish()
2662                  * many times while waiting for other interfaces to use their
2663                  * reservations
2664                  */
2665                 if (sdata->reserved_ready)
2666                         return 0;
2667
2668                 return ieee80211_vif_use_reserved_context(sdata);
2669         }
2670
2671         if (!cfg80211_chandef_identical(&sdata->vif.bss_conf.chandef,
2672                                         &sdata->csa_chandef))
2673                 return -EINVAL;
2674
2675         sdata->vif.csa_active = false;
2676
2677         err = ieee80211_set_after_csa_beacon(sdata, &changed);
2678         if (err)
2679                 return err;
2680
2681         ieee80211_bss_info_change_notify(sdata, changed);
2682
2683         if (sdata->csa_block_tx) {
2684                 ieee80211_wake_vif_queues(local, sdata,
2685                                           IEEE80211_QUEUE_STOP_REASON_CSA);
2686                 sdata->csa_block_tx = false;
2687         }
2688
2689         err = drv_post_channel_switch(sdata);
2690         if (err)
2691                 return err;
2692
2693         cfg80211_ch_switch_notify(sdata->dev, &sdata->csa_chandef);
2694
2695         return 0;
2696 }
2697
2698 static void ieee80211_csa_finalize(struct ieee80211_sub_if_data *sdata)
2699 {
2700         if (__ieee80211_csa_finalize(sdata)) {
2701                 sdata_info(sdata, "failed to finalize CSA, disconnecting\n");
2702                 cfg80211_stop_iface(sdata->local->hw.wiphy, &sdata->wdev,
2703                                     GFP_KERNEL);
2704         }
2705 }
2706
2707 void ieee80211_csa_finalize_work(struct work_struct *work)
2708 {
2709         struct ieee80211_sub_if_data *sdata =
2710                 container_of(work, struct ieee80211_sub_if_data,
2711                              csa_finalize_work);
2712         struct ieee80211_local *local = sdata->local;
2713
2714         sdata_lock(sdata);
2715         mutex_lock(&local->mtx);
2716         mutex_lock(&local->chanctx_mtx);
2717
2718         /* AP might have been stopped while waiting for the lock. */
2719         if (!sdata->vif.csa_active)
2720                 goto unlock;
2721
2722         if (!ieee80211_sdata_running(sdata))
2723                 goto unlock;
2724
2725         ieee80211_csa_finalize(sdata);
2726
2727 unlock:
2728         mutex_unlock(&local->chanctx_mtx);
2729         mutex_unlock(&local->mtx);
2730         sdata_unlock(sdata);
2731 }
2732
2733 static int ieee80211_set_csa_beacon(struct ieee80211_sub_if_data *sdata,
2734                                     struct cfg80211_csa_settings *params,
2735                                     u32 *changed)
2736 {
2737         struct ieee80211_csa_settings csa = {};
2738         int err;
2739
2740         switch (sdata->vif.type) {
2741         case NL80211_IFTYPE_AP:
2742                 sdata->u.ap.next_beacon =
2743                         cfg80211_beacon_dup(&params->beacon_after);
2744                 if (!sdata->u.ap.next_beacon)
2745                         return -ENOMEM;
2746
2747                 /*
2748                  * With a count of 0, we don't have to wait for any
2749                  * TBTT before switching, so complete the CSA
2750                  * immediately.  In theory, with a count == 1 we
2751                  * should delay the switch until just before the next
2752                  * TBTT, but that would complicate things so we switch
2753                  * immediately too.  If we would delay the switch
2754                  * until the next TBTT, we would have to set the probe
2755                  * response here.
2756                  *
2757                  * TODO: A channel switch with count <= 1 without
2758                  * sending a CSA action frame is kind of useless,
2759                  * because the clients won't know we're changing
2760                  * channels.  The action frame must be implemented
2761                  * either here or in the userspace.
2762                  */
2763                 if (params->count <= 1)
2764                         break;
2765
2766                 if ((params->n_counter_offsets_beacon >
2767                      IEEE80211_MAX_CSA_COUNTERS_NUM) ||
2768                     (params->n_counter_offsets_presp >
2769                      IEEE80211_MAX_CSA_COUNTERS_NUM))
2770                         return -EINVAL;
2771
2772                 csa.counter_offsets_beacon = params->counter_offsets_beacon;
2773                 csa.counter_offsets_presp = params->counter_offsets_presp;
2774                 csa.n_counter_offsets_beacon = params->n_counter_offsets_beacon;
2775                 csa.n_counter_offsets_presp = params->n_counter_offsets_presp;
2776                 csa.count = params->count;
2777
2778                 err = ieee80211_assign_beacon(sdata, &params->beacon_csa, &csa);
2779                 if (err < 0) {
2780                         kfree(sdata->u.ap.next_beacon);
2781                         return err;
2782                 }
2783                 *changed |= err;
2784
2785                 break;
2786         case NL80211_IFTYPE_ADHOC:
2787                 if (!sdata->vif.bss_conf.ibss_joined)
2788                         return -EINVAL;
2789
2790                 if (params->chandef.width != sdata->u.ibss.chandef.width)
2791                         return -EINVAL;
2792
2793                 switch (params->chandef.width) {
2794                 case NL80211_CHAN_WIDTH_40:
2795                         if (cfg80211_get_chandef_type(&params->chandef) !=
2796                             cfg80211_get_chandef_type(&sdata->u.ibss.chandef))
2797                                 return -EINVAL;
2798                 case NL80211_CHAN_WIDTH_5:
2799                 case NL80211_CHAN_WIDTH_10:
2800                 case NL80211_CHAN_WIDTH_20_NOHT:
2801                 case NL80211_CHAN_WIDTH_20:
2802                         break;
2803                 default:
2804                         return -EINVAL;
2805                 }
2806
2807                 /* changes into another band are not supported */
2808                 if (sdata->u.ibss.chandef.chan->band !=
2809                     params->chandef.chan->band)
2810                         return -EINVAL;
2811
2812                 /* see comments in the NL80211_IFTYPE_AP block */
2813                 if (params->count > 1) {
2814                         err = ieee80211_ibss_csa_beacon(sdata, params);
2815                         if (err < 0)
2816                                 return err;
2817                         *changed |= err;
2818                 }
2819
2820                 ieee80211_send_action_csa(sdata, params);
2821
2822                 break;
2823 #ifdef CONFIG_MAC80211_MESH
2824         case NL80211_IFTYPE_MESH_POINT: {
2825                 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
2826
2827                 if (params->chandef.width != sdata->vif.bss_conf.chandef.width)
2828                         return -EINVAL;
2829
2830                 /* changes into another band are not supported */
2831                 if (sdata->vif.bss_conf.chandef.chan->band !=
2832                     params->chandef.chan->band)
2833                         return -EINVAL;
2834
2835                 if (ifmsh->csa_role == IEEE80211_MESH_CSA_ROLE_NONE) {
2836                         ifmsh->csa_role = IEEE80211_MESH_CSA_ROLE_INIT;
2837                         if (!ifmsh->pre_value)
2838                                 ifmsh->pre_value = 1;
2839                         else
2840                                 ifmsh->pre_value++;
2841                 }
2842
2843                 /* see comments in the NL80211_IFTYPE_AP block */
2844                 if (params->count > 1) {
2845                         err = ieee80211_mesh_csa_beacon(sdata, params);
2846                         if (err < 0) {
2847                                 ifmsh->csa_role = IEEE80211_MESH_CSA_ROLE_NONE;
2848                                 return err;
2849                         }
2850                         *changed |= err;
2851                 }
2852
2853                 if (ifmsh->csa_role == IEEE80211_MESH_CSA_ROLE_INIT)
2854                         ieee80211_send_action_csa(sdata, params);
2855
2856                 break;
2857                 }
2858 #endif
2859         default:
2860                 return -EOPNOTSUPP;
2861         }
2862
2863         return 0;
2864 }
2865
2866 static int
2867 __ieee80211_channel_switch(struct wiphy *wiphy, struct net_device *dev,
2868                            struct cfg80211_csa_settings *params)
2869 {
2870         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2871         struct ieee80211_local *local = sdata->local;
2872         struct ieee80211_channel_switch ch_switch;
2873         struct ieee80211_chanctx_conf *conf;
2874         struct ieee80211_chanctx *chanctx;
2875         u32 changed = 0;
2876         int err;
2877
2878         sdata_assert_lock(sdata);
2879         lockdep_assert_held(&local->mtx);
2880
2881         if (!list_empty(&local->roc_list) || local->scanning)
2882                 return -EBUSY;
2883
2884         if (sdata->wdev.cac_started)
2885                 return -EBUSY;
2886
2887         if (cfg80211_chandef_identical(&params->chandef,
2888                                        &sdata->vif.bss_conf.chandef))
2889                 return -EINVAL;
2890
2891         /* don't allow another channel switch if one is already active. */
2892         if (sdata->vif.csa_active)
2893                 return -EBUSY;
2894
2895         mutex_lock(&local->chanctx_mtx);
2896         conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
2897                                          lockdep_is_held(&local->chanctx_mtx));
2898         if (!conf) {
2899                 err = -EBUSY;
2900                 goto out;
2901         }
2902
2903         chanctx = container_of(conf, struct ieee80211_chanctx, conf);
2904         if (!chanctx) {
2905                 err = -EBUSY;
2906                 goto out;
2907         }
2908
2909         ch_switch.timestamp = 0;
2910         ch_switch.device_timestamp = 0;
2911         ch_switch.block_tx = params->block_tx;
2912         ch_switch.chandef = params->chandef;
2913         ch_switch.count = params->count;
2914
2915         err = drv_pre_channel_switch(sdata, &ch_switch);
2916         if (err)
2917                 goto out;
2918
2919         err = ieee80211_vif_reserve_chanctx(sdata, &params->chandef,
2920                                             chanctx->mode,
2921                                             params->radar_required);
2922         if (err)
2923                 goto out;
2924
2925         /* if reservation is invalid then this will fail */
2926         err = ieee80211_check_combinations(sdata, NULL, chanctx->mode, 0);
2927         if (err) {
2928                 ieee80211_vif_unreserve_chanctx(sdata);
2929                 goto out;
2930         }
2931
2932         err = ieee80211_set_csa_beacon(sdata, params, &changed);
2933         if (err) {
2934                 ieee80211_vif_unreserve_chanctx(sdata);
2935                 goto out;
2936         }
2937
2938         sdata->csa_chandef = params->chandef;
2939         sdata->csa_block_tx = params->block_tx;
2940         sdata->vif.csa_active = true;
2941
2942         if (sdata->csa_block_tx)
2943                 ieee80211_stop_vif_queues(local, sdata,
2944                                           IEEE80211_QUEUE_STOP_REASON_CSA);
2945
2946         cfg80211_ch_switch_started_notify(sdata->dev, &sdata->csa_chandef,
2947                                           params->count);
2948
2949         if (changed) {
2950                 ieee80211_bss_info_change_notify(sdata, changed);
2951                 drv_channel_switch_beacon(sdata, &params->chandef);
2952         } else {
2953                 /* if the beacon didn't change, we can finalize immediately */
2954                 ieee80211_csa_finalize(sdata);
2955         }
2956
2957 out:
2958         mutex_unlock(&local->chanctx_mtx);
2959         return err;
2960 }
2961
2962 int ieee80211_channel_switch(struct wiphy *wiphy, struct net_device *dev,
2963                              struct cfg80211_csa_settings *params)
2964 {
2965         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2966         struct ieee80211_local *local = sdata->local;
2967         int err;
2968
2969         mutex_lock(&local->mtx);
2970         err = __ieee80211_channel_switch(wiphy, dev, params);
2971         mutex_unlock(&local->mtx);
2972
2973         return err;
2974 }
2975
2976 u64 ieee80211_mgmt_tx_cookie(struct ieee80211_local *local)
2977 {
2978         lockdep_assert_held(&local->mtx);
2979
2980         local->roc_cookie_counter++;
2981
2982         /* wow, you wrapped 64 bits ... more likely a bug */
2983         if (WARN_ON(local->roc_cookie_counter == 0))
2984                 local->roc_cookie_counter++;
2985
2986         return local->roc_cookie_counter;
2987 }
2988
2989 int ieee80211_attach_ack_skb(struct ieee80211_local *local, struct sk_buff *skb,
2990                              u64 *cookie, gfp_t gfp)
2991 {
2992         unsigned long spin_flags;
2993         struct sk_buff *ack_skb;
2994         int id;
2995
2996         ack_skb = skb_copy(skb, gfp);
2997         if (!ack_skb)
2998                 return -ENOMEM;
2999
3000         spin_lock_irqsave(&local->ack_status_lock, spin_flags);
3001         id = idr_alloc(&local->ack_status_frames, ack_skb,
3002                        1, 0x10000, GFP_ATOMIC);
3003         spin_unlock_irqrestore(&local->ack_status_lock, spin_flags);
3004
3005         if (id < 0) {
3006                 kfree_skb(ack_skb);
3007                 return -ENOMEM;
3008         }
3009
3010         IEEE80211_SKB_CB(skb)->ack_frame_id = id;
3011
3012         *cookie = ieee80211_mgmt_tx_cookie(local);
3013         IEEE80211_SKB_CB(ack_skb)->ack.cookie = *cookie;
3014
3015         return 0;
3016 }
3017
3018 static void ieee80211_mgmt_frame_register(struct wiphy *wiphy,
3019                                           struct wireless_dev *wdev,
3020                                           u16 frame_type, bool reg)
3021 {
3022         struct ieee80211_local *local = wiphy_priv(wiphy);
3023         struct ieee80211_sub_if_data *sdata = IEEE80211_WDEV_TO_SUB_IF(wdev);
3024
3025         switch (frame_type) {
3026         case IEEE80211_FTYPE_MGMT | IEEE80211_STYPE_PROBE_REQ:
3027                 if (reg) {
3028                         local->probe_req_reg++;
3029                         sdata->vif.probe_req_reg++;
3030                 } else {
3031                         if (local->probe_req_reg)
3032                                 local->probe_req_reg--;
3033
3034                         if (sdata->vif.probe_req_reg)
3035                                 sdata->vif.probe_req_reg--;
3036                 }
3037
3038                 if (!local->open_count)
3039                         break;
3040
3041                 if (sdata->vif.probe_req_reg == 1)
3042                         drv_config_iface_filter(local, sdata, FIF_PROBE_REQ,
3043                                                 FIF_PROBE_REQ);
3044                 else if (sdata->vif.probe_req_reg == 0)
3045                         drv_config_iface_filter(local, sdata, 0,
3046                                                 FIF_PROBE_REQ);
3047
3048                 ieee80211_configure_filter(local);
3049                 break;
3050         default:
3051                 break;
3052         }
3053 }
3054
3055 static int ieee80211_set_antenna(struct wiphy *wiphy, u32 tx_ant, u32 rx_ant)
3056 {
3057         struct ieee80211_local *local = wiphy_priv(wiphy);
3058
3059         if (local->started)
3060                 return -EOPNOTSUPP;
3061
3062         return drv_set_antenna(local, tx_ant, rx_ant);
3063 }
3064
3065 static int ieee80211_get_antenna(struct wiphy *wiphy, u32 *tx_ant, u32 *rx_ant)
3066 {
3067         struct ieee80211_local *local = wiphy_priv(wiphy);
3068
3069         return drv_get_antenna(local, tx_ant, rx_ant);
3070 }
3071
3072 static int ieee80211_set_rekey_data(struct wiphy *wiphy,
3073                                     struct net_device *dev,
3074                                     struct cfg80211_gtk_rekey_data *data)
3075 {
3076         struct ieee80211_local *local = wiphy_priv(wiphy);
3077         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3078
3079         if (!local->ops->set_rekey_data)
3080                 return -EOPNOTSUPP;
3081
3082         drv_set_rekey_data(local, sdata, data);
3083
3084         return 0;
3085 }
3086
3087 static int ieee80211_probe_client(struct wiphy *wiphy, struct net_device *dev,
3088                                   const u8 *peer, u64 *cookie)
3089 {
3090         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3091         struct ieee80211_local *local = sdata->local;
3092         struct ieee80211_qos_hdr *nullfunc;
3093         struct sk_buff *skb;
3094         int size = sizeof(*nullfunc);
3095         __le16 fc;
3096         bool qos;
3097         struct ieee80211_tx_info *info;
3098         struct sta_info *sta;
3099         struct ieee80211_chanctx_conf *chanctx_conf;
3100         enum ieee80211_band band;
3101         int ret;
3102
3103         /* the lock is needed to assign the cookie later */
3104         mutex_lock(&local->mtx);
3105
3106         rcu_read_lock();
3107         chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
3108         if (WARN_ON(!chanctx_conf)) {
3109                 ret = -EINVAL;
3110                 goto unlock;
3111         }
3112         band = chanctx_conf->def.chan->band;
3113         sta = sta_info_get_bss(sdata, peer);
3114         if (sta) {
3115                 qos = sta->sta.wme;
3116         } else {
3117                 ret = -ENOLINK;
3118                 goto unlock;
3119         }
3120
3121         if (qos) {
3122                 fc = cpu_to_le16(IEEE80211_FTYPE_DATA |
3123                                  IEEE80211_STYPE_QOS_NULLFUNC |
3124                                  IEEE80211_FCTL_FROMDS);
3125         } else {
3126                 size -= 2;
3127                 fc = cpu_to_le16(IEEE80211_FTYPE_DATA |
3128                                  IEEE80211_STYPE_NULLFUNC |
3129                                  IEEE80211_FCTL_FROMDS);
3130         }
3131
3132         skb = dev_alloc_skb(local->hw.extra_tx_headroom + size);
3133         if (!skb) {
3134                 ret = -ENOMEM;
3135                 goto unlock;
3136         }
3137
3138         skb->dev = dev;
3139
3140         skb_reserve(skb, local->hw.extra_tx_headroom);
3141
3142         nullfunc = (void *) skb_put(skb, size);
3143         nullfunc->frame_control = fc;
3144         nullfunc->duration_id = 0;
3145         memcpy(nullfunc->addr1, sta->sta.addr, ETH_ALEN);
3146         memcpy(nullfunc->addr2, sdata->vif.addr, ETH_ALEN);
3147         memcpy(nullfunc->addr3, sdata->vif.addr, ETH_ALEN);
3148         nullfunc->seq_ctrl = 0;
3149
3150         info = IEEE80211_SKB_CB(skb);
3151
3152         info->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS |
3153                        IEEE80211_TX_INTFL_NL80211_FRAME_TX;
3154         info->band = band;
3155
3156         skb_set_queue_mapping(skb, IEEE80211_AC_VO);
3157         skb->priority = 7;
3158         if (qos)
3159                 nullfunc->qos_ctrl = cpu_to_le16(7);
3160
3161         ret = ieee80211_attach_ack_skb(local, skb, cookie, GFP_ATOMIC);
3162         if (ret) {
3163                 kfree_skb(skb);
3164                 goto unlock;
3165         }
3166
3167         local_bh_disable();
3168         ieee80211_xmit(sdata, sta, skb);
3169         local_bh_enable();
3170
3171         ret = 0;
3172 unlock:
3173         rcu_read_unlock();
3174         mutex_unlock(&local->mtx);
3175
3176         return ret;
3177 }
3178
3179 static int ieee80211_cfg_get_channel(struct wiphy *wiphy,
3180                                      struct wireless_dev *wdev,
3181                                      struct cfg80211_chan_def *chandef)
3182 {
3183         struct ieee80211_sub_if_data *sdata = IEEE80211_WDEV_TO_SUB_IF(wdev);
3184         struct ieee80211_local *local = wiphy_priv(wiphy);
3185         struct ieee80211_chanctx_conf *chanctx_conf;
3186         int ret = -ENODATA;
3187
3188         rcu_read_lock();
3189         chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
3190         if (chanctx_conf) {
3191                 *chandef = sdata->vif.bss_conf.chandef;
3192                 ret = 0;
3193         } else if (local->open_count > 0 &&
3194                    local->open_count == local->monitors &&
3195                    sdata->vif.type == NL80211_IFTYPE_MONITOR) {
3196                 if (local->use_chanctx)
3197                         *chandef = local->monitor_chandef;
3198                 else
3199                         *chandef = local->_oper_chandef;
3200                 ret = 0;
3201         }
3202         rcu_read_unlock();
3203
3204         return ret;
3205 }
3206
3207 #ifdef CONFIG_PM
3208 static void ieee80211_set_wakeup(struct wiphy *wiphy, bool enabled)
3209 {
3210         drv_set_wakeup(wiphy_priv(wiphy), enabled);
3211 }
3212 #endif
3213
3214 static int ieee80211_set_qos_map(struct wiphy *wiphy,
3215                                  struct net_device *dev,
3216                                  struct cfg80211_qos_map *qos_map)
3217 {
3218         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3219         struct mac80211_qos_map *new_qos_map, *old_qos_map;
3220
3221         if (qos_map) {
3222                 new_qos_map = kzalloc(sizeof(*new_qos_map), GFP_KERNEL);
3223                 if (!new_qos_map)
3224                         return -ENOMEM;
3225                 memcpy(&new_qos_map->qos_map, qos_map, sizeof(*qos_map));
3226         } else {
3227                 /* A NULL qos_map was passed to disable QoS mapping */
3228                 new_qos_map = NULL;
3229         }
3230
3231         old_qos_map = sdata_dereference(sdata->qos_map, sdata);
3232         rcu_assign_pointer(sdata->qos_map, new_qos_map);
3233         if (old_qos_map)
3234                 kfree_rcu(old_qos_map, rcu_head);
3235
3236         return 0;
3237 }
3238
3239 static int ieee80211_set_ap_chanwidth(struct wiphy *wiphy,
3240                                       struct net_device *dev,
3241                                       struct cfg80211_chan_def *chandef)
3242 {
3243         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3244         int ret;
3245         u32 changed = 0;
3246
3247         ret = ieee80211_vif_change_bandwidth(sdata, chandef, &changed);
3248         if (ret == 0)
3249                 ieee80211_bss_info_change_notify(sdata, changed);
3250
3251         return ret;
3252 }
3253
3254 static int ieee80211_add_tx_ts(struct wiphy *wiphy, struct net_device *dev,
3255                                u8 tsid, const u8 *peer, u8 up,
3256                                u16 admitted_time)
3257 {
3258         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3259         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3260         int ac = ieee802_1d_to_ac[up];
3261
3262         if (sdata->vif.type != NL80211_IFTYPE_STATION)
3263                 return -EOPNOTSUPP;
3264
3265         if (!(sdata->wmm_acm & BIT(up)))
3266                 return -EINVAL;
3267
3268         if (ifmgd->tx_tspec[ac].admitted_time)
3269                 return -EBUSY;
3270
3271         if (admitted_time) {
3272                 ifmgd->tx_tspec[ac].admitted_time = 32 * admitted_time;
3273                 ifmgd->tx_tspec[ac].tsid = tsid;
3274                 ifmgd->tx_tspec[ac].up = up;
3275         }
3276
3277         return 0;
3278 }
3279
3280 static int ieee80211_del_tx_ts(struct wiphy *wiphy, struct net_device *dev,
3281                                u8 tsid, const u8 *peer)
3282 {
3283         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3284         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3285         struct ieee80211_local *local = wiphy_priv(wiphy);
3286         int ac;
3287
3288         for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
3289                 struct ieee80211_sta_tx_tspec *tx_tspec = &ifmgd->tx_tspec[ac];
3290
3291                 /* skip unused entries */
3292                 if (!tx_tspec->admitted_time)
3293                         continue;
3294
3295                 if (tx_tspec->tsid != tsid)
3296                         continue;
3297
3298                 /* due to this new packets will be reassigned to non-ACM ACs */
3299                 tx_tspec->up = -1;
3300
3301                 /* Make sure that all packets have been sent to avoid to
3302                  * restore the QoS params on packets that are still on the
3303                  * queues.
3304                  */
3305                 synchronize_net();
3306                 ieee80211_flush_queues(local, sdata, false);
3307
3308                 /* restore the normal QoS parameters
3309                  * (unconditionally to avoid races)
3310                  */
3311                 tx_tspec->action = TX_TSPEC_ACTION_STOP_DOWNGRADE;
3312                 tx_tspec->downgraded = false;
3313                 ieee80211_sta_handle_tspec_ac_params(sdata);
3314
3315                 /* finally clear all the data */
3316                 memset(tx_tspec, 0, sizeof(*tx_tspec));
3317
3318                 return 0;
3319         }
3320
3321         return -ENOENT;
3322 }
3323
3324 const struct cfg80211_ops mac80211_config_ops = {
3325         .add_virtual_intf = ieee80211_add_iface,
3326         .del_virtual_intf = ieee80211_del_iface,
3327         .change_virtual_intf = ieee80211_change_iface,
3328         .start_p2p_device = ieee80211_start_p2p_device,
3329         .stop_p2p_device = ieee80211_stop_p2p_device,
3330         .add_key = ieee80211_add_key,
3331         .del_key = ieee80211_del_key,
3332         .get_key = ieee80211_get_key,
3333         .set_default_key = ieee80211_config_default_key,
3334         .set_default_mgmt_key = ieee80211_config_default_mgmt_key,
3335         .start_ap = ieee80211_start_ap,
3336         .change_beacon = ieee80211_change_beacon,
3337         .stop_ap = ieee80211_stop_ap,
3338         .add_station = ieee80211_add_station,
3339         .del_station = ieee80211_del_station,
3340         .change_station = ieee80211_change_station,
3341         .get_station = ieee80211_get_station,
3342         .dump_station = ieee80211_dump_station,
3343         .dump_survey = ieee80211_dump_survey,
3344 #ifdef CONFIG_MAC80211_MESH
3345         .add_mpath = ieee80211_add_mpath,
3346         .del_mpath = ieee80211_del_mpath,
3347         .change_mpath = ieee80211_change_mpath,
3348         .get_mpath = ieee80211_get_mpath,
3349         .dump_mpath = ieee80211_dump_mpath,
3350         .get_mpp = ieee80211_get_mpp,
3351         .dump_mpp = ieee80211_dump_mpp,
3352         .update_mesh_config = ieee80211_update_mesh_config,
3353         .get_mesh_config = ieee80211_get_mesh_config,
3354         .join_mesh = ieee80211_join_mesh,
3355         .leave_mesh = ieee80211_leave_mesh,
3356 #endif
3357         .join_ocb = ieee80211_join_ocb,
3358         .leave_ocb = ieee80211_leave_ocb,
3359         .change_bss = ieee80211_change_bss,
3360         .set_txq_params = ieee80211_set_txq_params,
3361         .set_monitor_channel = ieee80211_set_monitor_channel,
3362         .suspend = ieee80211_suspend,
3363         .resume = ieee80211_resume,
3364         .scan = ieee80211_scan,
3365         .abort_scan = ieee80211_abort_scan,
3366         .sched_scan_start = ieee80211_sched_scan_start,
3367         .sched_scan_stop = ieee80211_sched_scan_stop,
3368         .auth = ieee80211_auth,
3369         .assoc = ieee80211_assoc,
3370         .deauth = ieee80211_deauth,
3371         .disassoc = ieee80211_disassoc,
3372         .join_ibss = ieee80211_join_ibss,
3373         .leave_ibss = ieee80211_leave_ibss,
3374         .set_mcast_rate = ieee80211_set_mcast_rate,
3375         .set_wiphy_params = ieee80211_set_wiphy_params,
3376         .set_tx_power = ieee80211_set_tx_power,
3377         .get_tx_power = ieee80211_get_tx_power,
3378         .set_wds_peer = ieee80211_set_wds_peer,
3379         .rfkill_poll = ieee80211_rfkill_poll,
3380         CFG80211_TESTMODE_CMD(ieee80211_testmode_cmd)
3381         CFG80211_TESTMODE_DUMP(ieee80211_testmode_dump)
3382         .set_power_mgmt = ieee80211_set_power_mgmt,
3383         .set_bitrate_mask = ieee80211_set_bitrate_mask,
3384         .remain_on_channel = ieee80211_remain_on_channel,
3385         .cancel_remain_on_channel = ieee80211_cancel_remain_on_channel,
3386         .mgmt_tx = ieee80211_mgmt_tx,
3387         .mgmt_tx_cancel_wait = ieee80211_mgmt_tx_cancel_wait,
3388         .set_cqm_rssi_config = ieee80211_set_cqm_rssi_config,
3389         .mgmt_frame_register = ieee80211_mgmt_frame_register,
3390         .set_antenna = ieee80211_set_antenna,
3391         .get_antenna = ieee80211_get_antenna,
3392         .set_rekey_data = ieee80211_set_rekey_data,
3393         .tdls_oper = ieee80211_tdls_oper,
3394         .tdls_mgmt = ieee80211_tdls_mgmt,
3395         .tdls_channel_switch = ieee80211_tdls_channel_switch,
3396         .tdls_cancel_channel_switch = ieee80211_tdls_cancel_channel_switch,
3397         .probe_client = ieee80211_probe_client,
3398         .set_noack_map = ieee80211_set_noack_map,
3399 #ifdef CONFIG_PM
3400         .set_wakeup = ieee80211_set_wakeup,
3401 #endif
3402         .get_channel = ieee80211_cfg_get_channel,
3403         .start_radar_detection = ieee80211_start_radar_detection,
3404         .channel_switch = ieee80211_channel_switch,
3405         .set_qos_map = ieee80211_set_qos_map,
3406         .set_ap_chanwidth = ieee80211_set_ap_chanwidth,
3407         .add_tx_ts = ieee80211_add_tx_ts,
3408         .del_tx_ts = ieee80211_del_tx_ts,
3409 };