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 (sta && test_sta_flag(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, sdata->vif.type == NL80211_IFTYPE_STATION);
 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         ieee80211_purge_tx_queue(&local->hw, &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 static int sta_apply_auth_flags(struct ieee80211_local *local,
 879                                 struct sta_info *sta,
 880                                 u32 mask, u32 set)
 881 {
 882         int ret;
 883
 884         if (mask & BIT(NL80211_STA_FLAG_AUTHENTICATED) &&
 885             set & BIT(NL80211_STA_FLAG_AUTHENTICATED) &&
 886             !test_sta_flag(sta, WLAN_STA_AUTH)) {
 887                 ret = sta_info_move_state(sta, IEEE80211_STA_AUTH);
 888                 if (ret)
 889                         return ret;
 890         }
 891
 892         if (mask & BIT(NL80211_STA_FLAG_ASSOCIATED) &&
 893             set & BIT(NL80211_STA_FLAG_ASSOCIATED) &&
 894             !test_sta_flag(sta, WLAN_STA_ASSOC)) {
 895                 /*
 896                  * When peer becomes associated, init rate control as
 897                  * well. Some drivers require rate control initialized
 898                  * before drv_sta_state() is called.
 899                  */
 900                 if (!test_sta_flag(sta, WLAN_STA_RATE_CONTROL))
 901                         rate_control_rate_init(sta);
 902
 903                 ret = sta_info_move_state(sta, IEEE80211_STA_ASSOC);
 904                 if (ret)
 905                         return ret;
 906         }
 907
 908         if (mask & BIT(NL80211_STA_FLAG_AUTHORIZED)) {
 909                 if (set & BIT(NL80211_STA_FLAG_AUTHORIZED))
 910                         ret = sta_info_move_state(sta, IEEE80211_STA_AUTHORIZED);
 911                 else if (test_sta_flag(sta, WLAN_STA_AUTHORIZED))
 912                         ret = sta_info_move_state(sta, IEEE80211_STA_ASSOC);
 913                 else
 914                         ret = 0;
 915                 if (ret)
 916                         return ret;
 917         }
 918
 919         if (mask & BIT(NL80211_STA_FLAG_ASSOCIATED) &&
 920             !(set & BIT(NL80211_STA_FLAG_ASSOCIATED)) &&
 921             test_sta_flag(sta, WLAN_STA_ASSOC)) {
 922                 ret = sta_info_move_state(sta, IEEE80211_STA_AUTH);
 923                 if (ret)
 924                         return ret;
 925         }
 926
 927         if (mask & BIT(NL80211_STA_FLAG_AUTHENTICATED) &&
 928             !(set & BIT(NL80211_STA_FLAG_AUTHENTICATED)) &&
 929             test_sta_flag(sta, WLAN_STA_AUTH)) {
 930                 ret = sta_info_move_state(sta, IEEE80211_STA_NONE);
 931                 if (ret)
 932                         return ret;
 933         }
 934
 935         return 0;
 936 }
 937
 938 static void sta_apply_mesh_params(struct ieee80211_local *local,
 939                                   struct sta_info *sta,
 940                                   struct station_parameters *params)
 941 {
 942 #ifdef CONFIG_MAC80211_MESH
 943         struct ieee80211_sub_if_data *sdata = sta->sdata;
 944         u32 changed = 0;
 945
 946         if (params->sta_modify_mask & STATION_PARAM_APPLY_PLINK_STATE) {
 947                 switch (params->plink_state) {
 948                 case NL80211_PLINK_ESTAB:
 949                         if (sta->mesh->plink_state != NL80211_PLINK_ESTAB)
 950                                 changed = mesh_plink_inc_estab_count(sdata);
 951                         sta->mesh->plink_state = params->plink_state;
 952
 953                         ieee80211_mps_sta_status_update(sta);
 954                         changed |= ieee80211_mps_set_sta_local_pm(sta,
 955                                       sdata->u.mesh.mshcfg.power_mode);
 956                         break;
 957                 case NL80211_PLINK_LISTEN:
 958                 case NL80211_PLINK_BLOCKED:
 959                 case NL80211_PLINK_OPN_SNT:
 960                 case NL80211_PLINK_OPN_RCVD:
 961                 case NL80211_PLINK_CNF_RCVD:
 962                 case NL80211_PLINK_HOLDING:
 963                         if (sta->mesh->plink_state == NL80211_PLINK_ESTAB)
 964                                 changed = mesh_plink_dec_estab_count(sdata);
 965                         sta->mesh->plink_state = params->plink_state;
 966
 967                         ieee80211_mps_sta_status_update(sta);
 968                         changed |= ieee80211_mps_set_sta_local_pm(sta,
 969                                         NL80211_MESH_POWER_UNKNOWN);
 970                         break;
 971                 default:
 972                         /*  nothing  */
 973                         break;
 974                 }
 975         }
 976
 977         switch (params->plink_action) {
 978         case NL80211_PLINK_ACTION_NO_ACTION:
 979                 /* nothing */
 980                 break;
 981         case NL80211_PLINK_ACTION_OPEN:
 982                 changed |= mesh_plink_open(sta);
 983                 break;
 984         case NL80211_PLINK_ACTION_BLOCK:
 985                 changed |= mesh_plink_block(sta);
 986                 break;
 987         }
 988
 989         if (params->local_pm)
 990                 changed |= ieee80211_mps_set_sta_local_pm(sta,
 991                                                           params->local_pm);
 992
 993         ieee80211_mbss_info_change_notify(sdata, changed);
 994 #endif
 995 }
 996
 997 static int sta_apply_parameters(struct ieee80211_local *local,
 998                                 struct sta_info *sta,
 999                                 struct station_parameters *params)
1000 {
1001         int ret = 0;
1002         struct ieee80211_supported_band *sband;
1003         struct ieee80211_sub_if_data *sdata = sta->sdata;
1004         enum ieee80211_band band = ieee80211_get_sdata_band(sdata);
1005         u32 mask, set;
1006
1007         sband = local->hw.wiphy->bands[band];
1008
1009         mask = params->sta_flags_mask;
1010         set = params->sta_flags_set;
1011
1012         if (ieee80211_vif_is_mesh(&sdata->vif)) {
1013                 /*
1014                  * In mesh mode, ASSOCIATED isn't part of the nl80211
1015                  * API but must follow AUTHENTICATED for driver state.
1016                  */
1017                 if (mask & BIT(NL80211_STA_FLAG_AUTHENTICATED))
1018                         mask |= BIT(NL80211_STA_FLAG_ASSOCIATED);
1019                 if (set & BIT(NL80211_STA_FLAG_AUTHENTICATED))
1020                         set |= BIT(NL80211_STA_FLAG_ASSOCIATED);
1021         } else if (test_sta_flag(sta, WLAN_STA_TDLS_PEER)) {
1022                 /*
1023                  * TDLS -- everything follows authorized, but
1024                  * only becoming authorized is possible, not
1025                  * going back
1026                  */
1027                 if (set & BIT(NL80211_STA_FLAG_AUTHORIZED)) {
1028                         set |= BIT(NL80211_STA_FLAG_AUTHENTICATED) |
1029                                BIT(NL80211_STA_FLAG_ASSOCIATED);
1030                         mask |= BIT(NL80211_STA_FLAG_AUTHENTICATED) |
1031                                 BIT(NL80211_STA_FLAG_ASSOCIATED);
1032                 }
1033         }
1034
1035         if (mask & BIT(NL80211_STA_FLAG_WME) &&
1036             local->hw.queues >= IEEE80211_NUM_ACS)
1037                 sta->sta.wme = set & BIT(NL80211_STA_FLAG_WME);
1038
1039         /* auth flags will be set later for TDLS,
1040          * and for unassociated stations that move to assocaited */
1041         if (!test_sta_flag(sta, WLAN_STA_TDLS_PEER) &&
1042             !((mask & BIT(NL80211_STA_FLAG_ASSOCIATED)) &&
1043               (set & BIT(NL80211_STA_FLAG_ASSOCIATED)))) {
1044                 ret = sta_apply_auth_flags(local, sta, mask, set);
1045                 if (ret)
1046                         return ret;
1047         }
1048
1049         if (mask & BIT(NL80211_STA_FLAG_SHORT_PREAMBLE)) {
1050                 if (set & BIT(NL80211_STA_FLAG_SHORT_PREAMBLE))
1051                         set_sta_flag(sta, WLAN_STA_SHORT_PREAMBLE);
1052                 else
1053                         clear_sta_flag(sta, WLAN_STA_SHORT_PREAMBLE);
1054         }
1055
1056         if (mask & BIT(NL80211_STA_FLAG_MFP)) {
1057                 sta->sta.mfp = !!(set & BIT(NL80211_STA_FLAG_MFP));
1058                 if (set & BIT(NL80211_STA_FLAG_MFP))
1059                         set_sta_flag(sta, WLAN_STA_MFP);
1060                 else
1061                         clear_sta_flag(sta, WLAN_STA_MFP);
1062         }
1063
1064         if (mask & BIT(NL80211_STA_FLAG_TDLS_PEER)) {
1065                 if (set & BIT(NL80211_STA_FLAG_TDLS_PEER))
1066                         set_sta_flag(sta, WLAN_STA_TDLS_PEER);
1067                 else
1068                         clear_sta_flag(sta, WLAN_STA_TDLS_PEER);
1069         }
1070
1071         /* mark TDLS channel switch support, if the AP allows it */
1072         if (test_sta_flag(sta, WLAN_STA_TDLS_PEER) &&
1073             !sdata->u.mgd.tdls_chan_switch_prohibited &&
1074             params->ext_capab_len >= 4 &&
1075             params->ext_capab[3] & WLAN_EXT_CAPA4_TDLS_CHAN_SWITCH)
1076                 set_sta_flag(sta, WLAN_STA_TDLS_CHAN_SWITCH);
1077
1078         if (test_sta_flag(sta, WLAN_STA_TDLS_PEER) &&
1079             !sdata->u.mgd.tdls_wider_bw_prohibited &&
1080             ieee80211_hw_check(&local->hw, TDLS_WIDER_BW) &&
1081             params->ext_capab_len >= 8 &&
1082             params->ext_capab[7] & WLAN_EXT_CAPA8_TDLS_WIDE_BW_ENABLED)
1083                 set_sta_flag(sta, WLAN_STA_TDLS_WIDER_BW);
1084
1085         if (params->sta_modify_mask & STATION_PARAM_APPLY_UAPSD) {
1086                 sta->sta.uapsd_queues = params->uapsd_queues;
1087                 sta->sta.max_sp = params->max_sp;
1088         }
1089
1090         /*
1091          * cfg80211 validates this (1-2007) and allows setting the AID
1092          * only when creating a new station entry
1093          */
1094         if (params->aid)
1095                 sta->sta.aid = params->aid;
1096
1097         /*
1098          * Some of the following updates would be racy if called on an
1099          * existing station, via ieee80211_change_station(). However,
1100          * all such changes are rejected by cfg80211 except for updates
1101          * changing the supported rates on an existing but not yet used
1102          * TDLS peer.
1103          */
1104
1105         if (params->listen_interval >= 0)
1106                 sta->listen_interval = params->listen_interval;
1107
1108         if (params->supported_rates) {
1109                 ieee80211_parse_bitrates(&sdata->vif.bss_conf.chandef,
1110                                          sband, params->supported_rates,
1111                                          params->supported_rates_len,
1112                                          &sta->sta.supp_rates[band]);
1113         }
1114
1115         if (params->ht_capa)
1116                 ieee80211_ht_cap_ie_to_sta_ht_cap(sdata, sband,
1117                                                   params->ht_capa, sta);
1118
1119         if (params->vht_capa)
1120                 ieee80211_vht_cap_ie_to_sta_vht_cap(sdata, sband,
1121                                                     params->vht_capa, sta);
1122
1123         if (params->opmode_notif_used) {
1124                 /* returned value is only needed for rc update, but the
1125                  * rc isn't initialized here yet, so ignore it
1126                  */
1127                 __ieee80211_vht_handle_opmode(sdata, sta,
1128                                               params->opmode_notif, band);
1129         }
1130
1131         if (ieee80211_vif_is_mesh(&sdata->vif))
1132                 sta_apply_mesh_params(local, sta, params);
1133
1134         /* set the STA state after all sta info from usermode has been set */
1135         if (test_sta_flag(sta, WLAN_STA_TDLS_PEER) ||
1136             set & BIT(NL80211_STA_FLAG_ASSOCIATED)) {
1137                 ret = sta_apply_auth_flags(local, sta, mask, set);
1138                 if (ret)
1139                         return ret;
1140         }
1141
1142         return 0;
1143 }
1144
1145 static int ieee80211_add_station(struct wiphy *wiphy, struct net_device *dev,
1146                                  const u8 *mac,
1147                                  struct station_parameters *params)
1148 {
1149         struct ieee80211_local *local = wiphy_priv(wiphy);
1150         struct sta_info *sta;
1151         struct ieee80211_sub_if_data *sdata;
1152         int err;
1153
1154         if (params->vlan) {
1155                 sdata = IEEE80211_DEV_TO_SUB_IF(params->vlan);
1156
1157                 if (sdata->vif.type != NL80211_IFTYPE_AP_VLAN &&
1158                     sdata->vif.type != NL80211_IFTYPE_AP)
1159                         return -EINVAL;
1160         } else
1161                 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1162
1163         if (ether_addr_equal(mac, sdata->vif.addr))
1164                 return -EINVAL;
1165
1166         if (is_multicast_ether_addr(mac))
1167                 return -EINVAL;
1168
1169         if (params->sta_flags_set & BIT(NL80211_STA_FLAG_TDLS_PEER) &&
1170             sdata->vif.type == NL80211_IFTYPE_STATION &&
1171             !sdata->u.mgd.associated)
1172                 return -EINVAL;
1173
1174         sta = sta_info_alloc(sdata, mac, GFP_KERNEL);
1175         if (!sta)
1176                 return -ENOMEM;
1177
1178         /*
1179          * defaults -- if userspace wants something else we'll
1180          * change it accordingly in sta_apply_parameters()
1181          */
1182         if (!(params->sta_flags_set & BIT(NL80211_STA_FLAG_TDLS_PEER)) &&
1183             !(params->sta_flags_set & (BIT(NL80211_STA_FLAG_AUTHENTICATED) |
1184                                         BIT(NL80211_STA_FLAG_ASSOCIATED)))) {
1185                 sta_info_pre_move_state(sta, IEEE80211_STA_AUTH);
1186                 sta_info_pre_move_state(sta, IEEE80211_STA_ASSOC);
1187         }
1188         if (params->sta_flags_set & BIT(NL80211_STA_FLAG_TDLS_PEER))
1189                 sta->sta.tdls = true;
1190
1191         err = sta_apply_parameters(local, sta, params);
1192         if (err) {
1193                 sta_info_free(local, sta);
1194                 return err;
1195         }
1196
1197         /*
1198          * for TDLS and for unassociated station, rate control should be
1199          * initialized only when rates are known and station is marked
1200          * authorized/associated
1201          */
1202         if (!test_sta_flag(sta, WLAN_STA_TDLS_PEER) &&
1203             test_sta_flag(sta, WLAN_STA_ASSOC))
1204                 rate_control_rate_init(sta);
1205
1206         err = sta_info_insert_rcu(sta);
1207         if (err) {
1208                 rcu_read_unlock();
1209                 return err;
1210         }
1211
1212         rcu_read_unlock();
1213
1214         return 0;
1215 }
1216
1217 static int ieee80211_del_station(struct wiphy *wiphy, struct net_device *dev,
1218                                  struct station_del_parameters *params)
1219 {
1220         struct ieee80211_sub_if_data *sdata;
1221
1222         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1223
1224         if (params->mac)
1225                 return sta_info_destroy_addr_bss(sdata, params->mac);
1226
1227         sta_info_flush(sdata);
1228         return 0;
1229 }
1230
1231 static int ieee80211_change_station(struct wiphy *wiphy,
1232                                     struct net_device *dev, const u8 *mac,
1233                                     struct station_parameters *params)
1234 {
1235         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1236         struct ieee80211_local *local = wiphy_priv(wiphy);
1237         struct sta_info *sta;
1238         struct ieee80211_sub_if_data *vlansdata;
1239         enum cfg80211_station_type statype;
1240         int err;
1241
1242         mutex_lock(&local->sta_mtx);
1243
1244         sta = sta_info_get_bss(sdata, mac);
1245         if (!sta) {
1246                 err = -ENOENT;
1247                 goto out_err;
1248         }
1249
1250         switch (sdata->vif.type) {
1251         case NL80211_IFTYPE_MESH_POINT:
1252                 if (sdata->u.mesh.user_mpm)
1253                         statype = CFG80211_STA_MESH_PEER_USER;
1254                 else
1255                         statype = CFG80211_STA_MESH_PEER_KERNEL;
1256                 break;
1257         case NL80211_IFTYPE_ADHOC:
1258                 statype = CFG80211_STA_IBSS;
1259                 break;
1260         case NL80211_IFTYPE_STATION:
1261                 if (!test_sta_flag(sta, WLAN_STA_TDLS_PEER)) {
1262                         statype = CFG80211_STA_AP_STA;
1263                         break;
1264                 }
1265                 if (test_sta_flag(sta, WLAN_STA_AUTHORIZED))
1266                         statype = CFG80211_STA_TDLS_PEER_ACTIVE;
1267                 else
1268                         statype = CFG80211_STA_TDLS_PEER_SETUP;
1269                 break;
1270         case NL80211_IFTYPE_AP:
1271         case NL80211_IFTYPE_AP_VLAN:
1272                 if (test_sta_flag(sta, WLAN_STA_ASSOC))
1273                         statype = CFG80211_STA_AP_CLIENT;
1274                 else
1275                         statype = CFG80211_STA_AP_CLIENT_UNASSOC;
1276                 break;
1277         default:
1278                 err = -EOPNOTSUPP;
1279                 goto out_err;
1280         }
1281
1282         err = cfg80211_check_station_change(wiphy, params, statype);
1283         if (err)
1284                 goto out_err;
1285
1286         if (params->vlan && params->vlan != sta->sdata->dev) {
1287                 bool prev_4addr = false;
1288                 bool new_4addr = false;
1289
1290                 vlansdata = IEEE80211_DEV_TO_SUB_IF(params->vlan);
1291
1292                 if (params->vlan->ieee80211_ptr->use_4addr) {
1293                         if (vlansdata->u.vlan.sta) {
1294                                 err = -EBUSY;
1295                                 goto out_err;
1296                         }
1297
1298                         rcu_assign_pointer(vlansdata->u.vlan.sta, sta);
1299                         new_4addr = true;
1300                 }
1301
1302                 if (sta->sdata->vif.type == NL80211_IFTYPE_AP_VLAN &&
1303                     sta->sdata->u.vlan.sta) {
1304                         RCU_INIT_POINTER(sta->sdata->u.vlan.sta, NULL);
1305                         prev_4addr = true;
1306                 }
1307
1308                 sta->sdata = vlansdata;
1309                 ieee80211_check_fast_xmit(sta);
1310
1311                 if (sta->sta_state == IEEE80211_STA_AUTHORIZED &&
1312                     prev_4addr != new_4addr) {
1313                         if (new_4addr)
1314                                 atomic_dec(&sta->sdata->bss->num_mcast_sta);
1315                         else
1316                                 atomic_inc(&sta->sdata->bss->num_mcast_sta);
1317                 }
1318
1319                 if (sta->sta_state == IEEE80211_STA_AUTHORIZED)
1320                         cfg80211_send_layer2_update(sta->sdata->dev,
1321                                                     sta->sta.addr);
1322         }
1323
1324         err = sta_apply_parameters(local, sta, params);
1325         if (err)
1326                 goto out_err;
1327
1328         mutex_unlock(&local->sta_mtx);
1329
1330         if ((sdata->vif.type == NL80211_IFTYPE_AP ||
1331              sdata->vif.type == NL80211_IFTYPE_AP_VLAN) &&
1332             sta->known_smps_mode != sta->sdata->bss->req_smps &&
1333             test_sta_flag(sta, WLAN_STA_AUTHORIZED) &&
1334             sta_info_tx_streams(sta) != 1) {
1335                 ht_dbg(sta->sdata,
1336                        "%pM just authorized and MIMO capable - update SMPS\n",
1337                        sta->sta.addr);
1338                 ieee80211_send_smps_action(sta->sdata,
1339                         sta->sdata->bss->req_smps,
1340                         sta->sta.addr,
1341                         sta->sdata->vif.bss_conf.bssid);
1342         }
1343
1344         if (sdata->vif.type == NL80211_IFTYPE_STATION &&
1345             params->sta_flags_mask & BIT(NL80211_STA_FLAG_AUTHORIZED)) {
1346                 ieee80211_recalc_ps(local);
1347                 ieee80211_recalc_ps_vif(sdata);
1348         }
1349
1350         return 0;
1351 out_err:
1352         mutex_unlock(&local->sta_mtx);
1353         return err;
1354 }
1355
1356 #ifdef CONFIG_MAC80211_MESH
1357 static int ieee80211_add_mpath(struct wiphy *wiphy, struct net_device *dev,
1358                                const u8 *dst, const u8 *next_hop)
1359 {
1360         struct ieee80211_sub_if_data *sdata;
1361         struct mesh_path *mpath;
1362         struct sta_info *sta;
1363
1364         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1365
1366         rcu_read_lock();
1367         sta = sta_info_get(sdata, next_hop);
1368         if (!sta) {
1369                 rcu_read_unlock();
1370                 return -ENOENT;
1371         }
1372
1373         mpath = mesh_path_add(sdata, dst);
1374         if (IS_ERR(mpath)) {
1375                 rcu_read_unlock();
1376                 return PTR_ERR(mpath);
1377         }
1378
1379         mesh_path_fix_nexthop(mpath, sta);
1380
1381         rcu_read_unlock();
1382         return 0;
1383 }
1384
1385 static int ieee80211_del_mpath(struct wiphy *wiphy, struct net_device *dev,
1386                                const u8 *dst)
1387 {
1388         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1389
1390         if (dst)
1391                 return mesh_path_del(sdata, dst);
1392
1393         mesh_path_flush_by_iface(sdata);
1394         return 0;
1395 }
1396
1397 static int ieee80211_change_mpath(struct wiphy *wiphy, struct net_device *dev,
1398                                   const u8 *dst, const u8 *next_hop)
1399 {
1400         struct ieee80211_sub_if_data *sdata;
1401         struct mesh_path *mpath;
1402         struct sta_info *sta;
1403
1404         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1405
1406         rcu_read_lock();
1407
1408         sta = sta_info_get(sdata, next_hop);
1409         if (!sta) {
1410                 rcu_read_unlock();
1411                 return -ENOENT;
1412         }
1413
1414         mpath = mesh_path_lookup(sdata, dst);
1415         if (!mpath) {
1416                 rcu_read_unlock();
1417                 return -ENOENT;
1418         }
1419
1420         mesh_path_fix_nexthop(mpath, sta);
1421
1422         rcu_read_unlock();
1423         return 0;
1424 }
1425
1426 static void mpath_set_pinfo(struct mesh_path *mpath, u8 *next_hop,
1427                             struct mpath_info *pinfo)
1428 {
1429         struct sta_info *next_hop_sta = rcu_dereference(mpath->next_hop);
1430
1431         if (next_hop_sta)
1432                 memcpy(next_hop, next_hop_sta->sta.addr, ETH_ALEN);
1433         else
1434                 eth_zero_addr(next_hop);
1435
1436         memset(pinfo, 0, sizeof(*pinfo));
1437
1438         pinfo->generation = mesh_paths_generation;
1439
1440         pinfo->filled = MPATH_INFO_FRAME_QLEN |
1441                         MPATH_INFO_SN |
1442                         MPATH_INFO_METRIC |
1443                         MPATH_INFO_EXPTIME |
1444                         MPATH_INFO_DISCOVERY_TIMEOUT |
1445                         MPATH_INFO_DISCOVERY_RETRIES |
1446                         MPATH_INFO_FLAGS;
1447
1448         pinfo->frame_qlen = mpath->frame_queue.qlen;
1449         pinfo->sn = mpath->sn;
1450         pinfo->metric = mpath->metric;
1451         if (time_before(jiffies, mpath->exp_time))
1452                 pinfo->exptime = jiffies_to_msecs(mpath->exp_time - jiffies);
1453         pinfo->discovery_timeout =
1454                         jiffies_to_msecs(mpath->discovery_timeout);
1455         pinfo->discovery_retries = mpath->discovery_retries;
1456         if (mpath->flags & MESH_PATH_ACTIVE)
1457                 pinfo->flags |= NL80211_MPATH_FLAG_ACTIVE;
1458         if (mpath->flags & MESH_PATH_RESOLVING)
1459                 pinfo->flags |= NL80211_MPATH_FLAG_RESOLVING;
1460         if (mpath->flags & MESH_PATH_SN_VALID)
1461                 pinfo->flags |= NL80211_MPATH_FLAG_SN_VALID;
1462         if (mpath->flags & MESH_PATH_FIXED)
1463                 pinfo->flags |= NL80211_MPATH_FLAG_FIXED;
1464         if (mpath->flags & MESH_PATH_RESOLVED)
1465                 pinfo->flags |= NL80211_MPATH_FLAG_RESOLVED;
1466 }
1467
1468 static int ieee80211_get_mpath(struct wiphy *wiphy, struct net_device *dev,
1469                                u8 *dst, u8 *next_hop, struct mpath_info *pinfo)
1470
1471 {
1472         struct ieee80211_sub_if_data *sdata;
1473         struct mesh_path *mpath;
1474
1475         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1476
1477         rcu_read_lock();
1478         mpath = mesh_path_lookup(sdata, dst);
1479         if (!mpath) {
1480                 rcu_read_unlock();
1481                 return -ENOENT;
1482         }
1483         memcpy(dst, mpath->dst, ETH_ALEN);
1484         mpath_set_pinfo(mpath, next_hop, pinfo);
1485         rcu_read_unlock();
1486         return 0;
1487 }
1488
1489 static int ieee80211_dump_mpath(struct wiphy *wiphy, struct net_device *dev,
1490                                 int idx, u8 *dst, u8 *next_hop,
1491                                 struct mpath_info *pinfo)
1492 {
1493         struct ieee80211_sub_if_data *sdata;
1494         struct mesh_path *mpath;
1495
1496         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1497
1498         rcu_read_lock();
1499         mpath = mesh_path_lookup_by_idx(sdata, idx);
1500         if (!mpath) {
1501                 rcu_read_unlock();
1502                 return -ENOENT;
1503         }
1504         memcpy(dst, mpath->dst, ETH_ALEN);
1505         mpath_set_pinfo(mpath, next_hop, pinfo);
1506         rcu_read_unlock();
1507         return 0;
1508 }
1509
1510 static void mpp_set_pinfo(struct mesh_path *mpath, u8 *mpp,
1511                           struct mpath_info *pinfo)
1512 {
1513         memset(pinfo, 0, sizeof(*pinfo));
1514         memcpy(mpp, mpath->mpp, ETH_ALEN);
1515
1516         pinfo->generation = mpp_paths_generation;
1517 }
1518
1519 static int ieee80211_get_mpp(struct wiphy *wiphy, struct net_device *dev,
1520                              u8 *dst, u8 *mpp, struct mpath_info *pinfo)
1521
1522 {
1523         struct ieee80211_sub_if_data *sdata;
1524         struct mesh_path *mpath;
1525
1526         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1527
1528         rcu_read_lock();
1529         mpath = mpp_path_lookup(sdata, dst);
1530         if (!mpath) {
1531                 rcu_read_unlock();
1532                 return -ENOENT;
1533         }
1534         memcpy(dst, mpath->dst, ETH_ALEN);
1535         mpp_set_pinfo(mpath, mpp, pinfo);
1536         rcu_read_unlock();
1537         return 0;
1538 }
1539
1540 static int ieee80211_dump_mpp(struct wiphy *wiphy, struct net_device *dev,
1541                               int idx, u8 *dst, u8 *mpp,
1542                               struct mpath_info *pinfo)
1543 {
1544         struct ieee80211_sub_if_data *sdata;
1545         struct mesh_path *mpath;
1546
1547         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1548
1549         rcu_read_lock();
1550         mpath = mpp_path_lookup_by_idx(sdata, idx);
1551         if (!mpath) {
1552                 rcu_read_unlock();
1553                 return -ENOENT;
1554         }
1555         memcpy(dst, mpath->dst, ETH_ALEN);
1556         mpp_set_pinfo(mpath, mpp, pinfo);
1557         rcu_read_unlock();
1558         return 0;
1559 }
1560
1561 static int ieee80211_get_mesh_config(struct wiphy *wiphy,
1562                                 struct net_device *dev,
1563                                 struct mesh_config *conf)
1564 {
1565         struct ieee80211_sub_if_data *sdata;
1566         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1567
1568         memcpy(conf, &(sdata->u.mesh.mshcfg), sizeof(struct mesh_config));
1569         return 0;
1570 }
1571
1572 static inline bool _chg_mesh_attr(enum nl80211_meshconf_params parm, u32 mask)
1573 {
1574         return (mask >> (parm-1)) & 0x1;
1575 }
1576
1577 static int copy_mesh_setup(struct ieee80211_if_mesh *ifmsh,
1578                 const struct mesh_setup *setup)
1579 {
1580         u8 *new_ie;
1581         const u8 *old_ie;
1582         struct ieee80211_sub_if_data *sdata = container_of(ifmsh,
1583                                         struct ieee80211_sub_if_data, u.mesh);
1584
1585         /* allocate information elements */
1586         new_ie = NULL;
1587         old_ie = ifmsh->ie;
1588
1589         if (setup->ie_len) {
1590                 new_ie = kmemdup(setup->ie, setup->ie_len,
1591                                 GFP_KERNEL);
1592                 if (!new_ie)
1593                         return -ENOMEM;
1594         }
1595         ifmsh->ie_len = setup->ie_len;
1596         ifmsh->ie = new_ie;
1597         kfree(old_ie);
1598
1599         /* now copy the rest of the setup parameters */
1600         ifmsh->mesh_id_len = setup->mesh_id_len;
1601         memcpy(ifmsh->mesh_id, setup->mesh_id, ifmsh->mesh_id_len);
1602         ifmsh->mesh_sp_id = setup->sync_method;
1603         ifmsh->mesh_pp_id = setup->path_sel_proto;
1604         ifmsh->mesh_pm_id = setup->path_metric;
1605         ifmsh->user_mpm = setup->user_mpm;
1606         ifmsh->mesh_auth_id = setup->auth_id;
1607         ifmsh->security = IEEE80211_MESH_SEC_NONE;
1608         if (setup->is_authenticated)
1609                 ifmsh->security |= IEEE80211_MESH_SEC_AUTHED;
1610         if (setup->is_secure)
1611                 ifmsh->security |= IEEE80211_MESH_SEC_SECURED;
1612
1613         /* mcast rate setting in Mesh Node */
1614         memcpy(sdata->vif.bss_conf.mcast_rate, setup->mcast_rate,
1615                                                 sizeof(setup->mcast_rate));
1616         sdata->vif.bss_conf.basic_rates = setup->basic_rates;
1617
1618         sdata->vif.bss_conf.beacon_int = setup->beacon_interval;
1619         sdata->vif.bss_conf.dtim_period = setup->dtim_period;
1620
1621         return 0;
1622 }
1623
1624 static int ieee80211_update_mesh_config(struct wiphy *wiphy,
1625                                         struct net_device *dev, u32 mask,
1626                                         const struct mesh_config *nconf)
1627 {
1628         struct mesh_config *conf;
1629         struct ieee80211_sub_if_data *sdata;
1630         struct ieee80211_if_mesh *ifmsh;
1631
1632         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1633         ifmsh = &sdata->u.mesh;
1634
1635         /* Set the config options which we are interested in setting */
1636         conf = &(sdata->u.mesh.mshcfg);
1637         if (_chg_mesh_attr(NL80211_MESHCONF_RETRY_TIMEOUT, mask))
1638                 conf->dot11MeshRetryTimeout = nconf->dot11MeshRetryTimeout;
1639         if (_chg_mesh_attr(NL80211_MESHCONF_CONFIRM_TIMEOUT, mask))
1640                 conf->dot11MeshConfirmTimeout = nconf->dot11MeshConfirmTimeout;
1641         if (_chg_mesh_attr(NL80211_MESHCONF_HOLDING_TIMEOUT, mask))
1642                 conf->dot11MeshHoldingTimeout = nconf->dot11MeshHoldingTimeout;
1643         if (_chg_mesh_attr(NL80211_MESHCONF_MAX_PEER_LINKS, mask))
1644                 conf->dot11MeshMaxPeerLinks = nconf->dot11MeshMaxPeerLinks;
1645         if (_chg_mesh_attr(NL80211_MESHCONF_MAX_RETRIES, mask))
1646                 conf->dot11MeshMaxRetries = nconf->dot11MeshMaxRetries;
1647         if (_chg_mesh_attr(NL80211_MESHCONF_TTL, mask))
1648                 conf->dot11MeshTTL = nconf->dot11MeshTTL;
1649         if (_chg_mesh_attr(NL80211_MESHCONF_ELEMENT_TTL, mask))
1650                 conf->element_ttl = nconf->element_ttl;
1651         if (_chg_mesh_attr(NL80211_MESHCONF_AUTO_OPEN_PLINKS, mask)) {
1652                 if (ifmsh->user_mpm)
1653                         return -EBUSY;
1654                 conf->auto_open_plinks = nconf->auto_open_plinks;
1655         }
1656         if (_chg_mesh_attr(NL80211_MESHCONF_SYNC_OFFSET_MAX_NEIGHBOR, mask))
1657                 conf->dot11MeshNbrOffsetMaxNeighbor =
1658                         nconf->dot11MeshNbrOffsetMaxNeighbor;
1659         if (_chg_mesh_attr(NL80211_MESHCONF_HWMP_MAX_PREQ_RETRIES, mask))
1660                 conf->dot11MeshHWMPmaxPREQretries =
1661                         nconf->dot11MeshHWMPmaxPREQretries;
1662         if (_chg_mesh_attr(NL80211_MESHCONF_PATH_REFRESH_TIME, mask))
1663                 conf->path_refresh_time = nconf->path_refresh_time;
1664         if (_chg_mesh_attr(NL80211_MESHCONF_MIN_DISCOVERY_TIMEOUT, mask))
1665                 conf->min_discovery_timeout = nconf->min_discovery_timeout;
1666         if (_chg_mesh_attr(NL80211_MESHCONF_HWMP_ACTIVE_PATH_TIMEOUT, mask))
1667                 conf->dot11MeshHWMPactivePathTimeout =
1668                         nconf->dot11MeshHWMPactivePathTimeout;
1669         if (_chg_mesh_attr(NL80211_MESHCONF_HWMP_PREQ_MIN_INTERVAL, mask))
1670                 conf->dot11MeshHWMPpreqMinInterval =
1671                         nconf->dot11MeshHWMPpreqMinInterval;
1672         if (_chg_mesh_attr(NL80211_MESHCONF_HWMP_PERR_MIN_INTERVAL, mask))
1673                 conf->dot11MeshHWMPperrMinInterval =
1674                         nconf->dot11MeshHWMPperrMinInterval;
1675         if (_chg_mesh_attr(NL80211_MESHCONF_HWMP_NET_DIAM_TRVS_TIME,
1676                            mask))
1677                 conf->dot11MeshHWMPnetDiameterTraversalTime =
1678                         nconf->dot11MeshHWMPnetDiameterTraversalTime;
1679         if (_chg_mesh_attr(NL80211_MESHCONF_HWMP_ROOTMODE, mask)) {
1680                 conf->dot11MeshHWMPRootMode = nconf->dot11MeshHWMPRootMode;
1681                 ieee80211_mesh_root_setup(ifmsh);
1682         }
1683         if (_chg_mesh_attr(NL80211_MESHCONF_GATE_ANNOUNCEMENTS, mask)) {
1684                 /* our current gate announcement implementation rides on root
1685                  * announcements, so require this ifmsh to also be a root node
1686                  * */
1687                 if (nconf->dot11MeshGateAnnouncementProtocol &&
1688                     !(conf->dot11MeshHWMPRootMode > IEEE80211_ROOTMODE_ROOT)) {
1689                         conf->dot11MeshHWMPRootMode = IEEE80211_PROACTIVE_RANN;
1690                         ieee80211_mesh_root_setup(ifmsh);
1691                 }
1692                 conf->dot11MeshGateAnnouncementProtocol =
1693                         nconf->dot11MeshGateAnnouncementProtocol;
1694         }
1695         if (_chg_mesh_attr(NL80211_MESHCONF_HWMP_RANN_INTERVAL, mask))
1696                 conf->dot11MeshHWMPRannInterval =
1697                         nconf->dot11MeshHWMPRannInterval;
1698         if (_chg_mesh_attr(NL80211_MESHCONF_FORWARDING, mask))
1699                 conf->dot11MeshForwarding = nconf->dot11MeshForwarding;
1700         if (_chg_mesh_attr(NL80211_MESHCONF_RSSI_THRESHOLD, mask)) {
1701                 /* our RSSI threshold implementation is supported only for
1702                  * devices that report signal in dBm.
1703                  */
1704                 if (!ieee80211_hw_check(&sdata->local->hw, SIGNAL_DBM))
1705                         return -ENOTSUPP;
1706                 conf->rssi_threshold = nconf->rssi_threshold;
1707         }
1708         if (_chg_mesh_attr(NL80211_MESHCONF_HT_OPMODE, mask)) {
1709                 conf->ht_opmode = nconf->ht_opmode;
1710                 sdata->vif.bss_conf.ht_operation_mode = nconf->ht_opmode;
1711                 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_HT);
1712         }
1713         if (_chg_mesh_attr(NL80211_MESHCONF_HWMP_PATH_TO_ROOT_TIMEOUT, mask))
1714                 conf->dot11MeshHWMPactivePathToRootTimeout =
1715                         nconf->dot11MeshHWMPactivePathToRootTimeout;
1716         if (_chg_mesh_attr(NL80211_MESHCONF_HWMP_ROOT_INTERVAL, mask))
1717                 conf->dot11MeshHWMProotInterval =
1718                         nconf->dot11MeshHWMProotInterval;
1719         if (_chg_mesh_attr(NL80211_MESHCONF_HWMP_CONFIRMATION_INTERVAL, mask))
1720                 conf->dot11MeshHWMPconfirmationInterval =
1721                         nconf->dot11MeshHWMPconfirmationInterval;
1722         if (_chg_mesh_attr(NL80211_MESHCONF_POWER_MODE, mask)) {
1723                 conf->power_mode = nconf->power_mode;
1724                 ieee80211_mps_local_status_update(sdata);
1725         }
1726         if (_chg_mesh_attr(NL80211_MESHCONF_AWAKE_WINDOW, mask))
1727                 conf->dot11MeshAwakeWindowDuration =
1728                         nconf->dot11MeshAwakeWindowDuration;
1729         if (_chg_mesh_attr(NL80211_MESHCONF_PLINK_TIMEOUT, mask))
1730                 conf->plink_timeout = nconf->plink_timeout;
1731         ieee80211_mbss_info_change_notify(sdata, BSS_CHANGED_BEACON);
1732         return 0;
1733 }
1734
1735 static int ieee80211_join_mesh(struct wiphy *wiphy, struct net_device *dev,
1736                                const struct mesh_config *conf,
1737                                const struct mesh_setup *setup)
1738 {
1739         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1740         struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
1741         int err;
1742
1743         memcpy(&ifmsh->mshcfg, conf, sizeof(struct mesh_config));
1744         err = copy_mesh_setup(ifmsh, setup);
1745         if (err)
1746                 return err;
1747
1748         /* can mesh use other SMPS modes? */
1749         sdata->smps_mode = IEEE80211_SMPS_OFF;
1750         sdata->needed_rx_chains = sdata->local->rx_chains;
1751
1752         mutex_lock(&sdata->local->mtx);
1753         err = ieee80211_vif_use_channel(sdata, &setup->chandef,
1754                                         IEEE80211_CHANCTX_SHARED);
1755         mutex_unlock(&sdata->local->mtx);
1756         if (err)
1757                 return err;
1758
1759         return ieee80211_start_mesh(sdata);
1760 }
1761
1762 static int ieee80211_leave_mesh(struct wiphy *wiphy, struct net_device *dev)
1763 {
1764         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1765
1766         ieee80211_stop_mesh(sdata);
1767         mutex_lock(&sdata->local->mtx);
1768         ieee80211_vif_release_channel(sdata);
1769         kfree(sdata->u.mesh.ie);
1770         mutex_unlock(&sdata->local->mtx);
1771
1772         return 0;
1773 }
1774 #endif
1775
1776 static int ieee80211_change_bss(struct wiphy *wiphy,
1777                                 struct net_device *dev,
1778                                 struct bss_parameters *params)
1779 {
1780         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1781         enum ieee80211_band band;
1782         u32 changed = 0;
1783
1784         if (!sdata_dereference(sdata->u.ap.beacon, sdata))
1785                 return -ENOENT;
1786
1787         band = ieee80211_get_sdata_band(sdata);
1788
1789         if (params->use_cts_prot >= 0) {
1790                 sdata->vif.bss_conf.use_cts_prot = params->use_cts_prot;
1791                 changed |= BSS_CHANGED_ERP_CTS_PROT;
1792         }
1793         if (params->use_short_preamble >= 0) {
1794                 sdata->vif.bss_conf.use_short_preamble =
1795                         params->use_short_preamble;
1796                 changed |= BSS_CHANGED_ERP_PREAMBLE;
1797         }
1798
1799         if (!sdata->vif.bss_conf.use_short_slot &&
1800             band == IEEE80211_BAND_5GHZ) {
1801                 sdata->vif.bss_conf.use_short_slot = true;
1802                 changed |= BSS_CHANGED_ERP_SLOT;
1803         }
1804
1805         if (params->use_short_slot_time >= 0) {
1806                 sdata->vif.bss_conf.use_short_slot =
1807                         params->use_short_slot_time;
1808                 changed |= BSS_CHANGED_ERP_SLOT;
1809         }
1810
1811         if (params->basic_rates) {
1812                 ieee80211_parse_bitrates(&sdata->vif.bss_conf.chandef,
1813                                          wiphy->bands[band],
1814                                          params->basic_rates,
1815                                          params->basic_rates_len,
1816                                          &sdata->vif.bss_conf.basic_rates);
1817                 changed |= BSS_CHANGED_BASIC_RATES;
1818         }
1819
1820         if (params->ap_isolate >= 0) {
1821                 if (params->ap_isolate)
1822                         sdata->flags |= IEEE80211_SDATA_DONT_BRIDGE_PACKETS;
1823                 else
1824                         sdata->flags &= ~IEEE80211_SDATA_DONT_BRIDGE_PACKETS;
1825         }
1826
1827         if (params->ht_opmode >= 0) {
1828                 sdata->vif.bss_conf.ht_operation_mode =
1829                         (u16) params->ht_opmode;
1830                 changed |= BSS_CHANGED_HT;
1831         }
1832
1833         if (params->p2p_ctwindow >= 0) {
1834                 sdata->vif.bss_conf.p2p_noa_attr.oppps_ctwindow &=
1835                                         ~IEEE80211_P2P_OPPPS_CTWINDOW_MASK;
1836                 sdata->vif.bss_conf.p2p_noa_attr.oppps_ctwindow |=
1837                         params->p2p_ctwindow & IEEE80211_P2P_OPPPS_CTWINDOW_MASK;
1838                 changed |= BSS_CHANGED_P2P_PS;
1839         }
1840
1841         if (params->p2p_opp_ps > 0) {
1842                 sdata->vif.bss_conf.p2p_noa_attr.oppps_ctwindow |=
1843                                         IEEE80211_P2P_OPPPS_ENABLE_BIT;
1844                 changed |= BSS_CHANGED_P2P_PS;
1845         } else if (params->p2p_opp_ps == 0) {
1846                 sdata->vif.bss_conf.p2p_noa_attr.oppps_ctwindow &=
1847                                         ~IEEE80211_P2P_OPPPS_ENABLE_BIT;
1848                 changed |= BSS_CHANGED_P2P_PS;
1849         }
1850
1851         ieee80211_bss_info_change_notify(sdata, changed);
1852
1853         return 0;
1854 }
1855
1856 static int ieee80211_set_txq_params(struct wiphy *wiphy,
1857                                     struct net_device *dev,
1858                                     struct ieee80211_txq_params *params)
1859 {
1860         struct ieee80211_local *local = wiphy_priv(wiphy);
1861         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1862         struct ieee80211_tx_queue_params p;
1863
1864         if (!local->ops->conf_tx)
1865                 return -EOPNOTSUPP;
1866
1867         if (local->hw.queues < IEEE80211_NUM_ACS)
1868                 return -EOPNOTSUPP;
1869
1870         memset(&p, 0, sizeof(p));
1871         p.aifs = params->aifs;
1872         p.cw_max = params->cwmax;
1873         p.cw_min = params->cwmin;
1874         p.txop = params->txop;
1875
1876         /*
1877          * Setting tx queue params disables u-apsd because it's only
1878          * called in master mode.
1879          */
1880         p.uapsd = false;
1881
1882         sdata->tx_conf[params->ac] = p;
1883         if (drv_conf_tx(local, sdata, params->ac, &p)) {
1884                 wiphy_debug(local->hw.wiphy,
1885                             "failed to set TX queue parameters for AC %d\n",
1886                             params->ac);
1887                 return -EINVAL;
1888         }
1889
1890         ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_QOS);
1891
1892         return 0;
1893 }
1894
1895 #ifdef CONFIG_PM
1896 static int ieee80211_suspend(struct wiphy *wiphy,
1897                              struct cfg80211_wowlan *wowlan)
1898 {
1899         return __ieee80211_suspend(wiphy_priv(wiphy), wowlan);
1900 }
1901
1902 static int ieee80211_resume(struct wiphy *wiphy)
1903 {
1904         return __ieee80211_resume(wiphy_priv(wiphy));
1905 }
1906 #else
1907 #define ieee80211_suspend NULL
1908 #define ieee80211_resume NULL
1909 #endif
1910
1911 static int ieee80211_scan(struct wiphy *wiphy,
1912                           struct cfg80211_scan_request *req)
1913 {
1914         struct ieee80211_sub_if_data *sdata;
1915
1916         sdata = IEEE80211_WDEV_TO_SUB_IF(req->wdev);
1917
1918         switch (ieee80211_vif_type_p2p(&sdata->vif)) {
1919         case NL80211_IFTYPE_STATION:
1920         case NL80211_IFTYPE_ADHOC:
1921         case NL80211_IFTYPE_MESH_POINT:
1922         case NL80211_IFTYPE_P2P_CLIENT:
1923         case NL80211_IFTYPE_P2P_DEVICE:
1924                 break;
1925         case NL80211_IFTYPE_P2P_GO:
1926                 if (sdata->local->ops->hw_scan)
1927                         break;
1928                 /*
1929                  * FIXME: implement NoA while scanning in software,
1930                  * for now fall through to allow scanning only when
1931                  * beaconing hasn't been configured yet
1932                  */
1933         case NL80211_IFTYPE_AP:
1934                 /*
1935                  * If the scan has been forced (and the driver supports
1936                  * forcing), don't care about being beaconing already.
1937                  * This will create problems to the attached stations (e.g. all
1938                  * the  frames sent while scanning on other channel will be
1939                  * lost)
1940                  */
1941                 if (sdata->u.ap.beacon &&
1942                     (!(wiphy->features & NL80211_FEATURE_AP_SCAN) ||
1943                      !(req->flags & NL80211_SCAN_FLAG_AP)))
1944                         return -EOPNOTSUPP;
1945                 break;
1946         default:
1947                 return -EOPNOTSUPP;
1948         }
1949
1950         return ieee80211_request_scan(sdata, req);
1951 }
1952
1953 static int
1954 ieee80211_sched_scan_start(struct wiphy *wiphy,
1955                            struct net_device *dev,
1956                            struct cfg80211_sched_scan_request *req)
1957 {
1958         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1959
1960         if (!sdata->local->ops->sched_scan_start)
1961                 return -EOPNOTSUPP;
1962
1963         return ieee80211_request_sched_scan_start(sdata, req);
1964 }
1965
1966 static int
1967 ieee80211_sched_scan_stop(struct wiphy *wiphy, struct net_device *dev)
1968 {
1969         struct ieee80211_local *local = wiphy_priv(wiphy);
1970
1971         if (!local->ops->sched_scan_stop)
1972                 return -EOPNOTSUPP;
1973
1974         return ieee80211_request_sched_scan_stop(local);
1975 }
1976
1977 static int ieee80211_auth(struct wiphy *wiphy, struct net_device *dev,
1978                           struct cfg80211_auth_request *req)
1979 {
1980         return ieee80211_mgd_auth(IEEE80211_DEV_TO_SUB_IF(dev), req);
1981 }
1982
1983 static int ieee80211_assoc(struct wiphy *wiphy, struct net_device *dev,
1984                            struct cfg80211_assoc_request *req)
1985 {
1986         return ieee80211_mgd_assoc(IEEE80211_DEV_TO_SUB_IF(dev), req);
1987 }
1988
1989 static int ieee80211_deauth(struct wiphy *wiphy, struct net_device *dev,
1990                             struct cfg80211_deauth_request *req)
1991 {
1992         return ieee80211_mgd_deauth(IEEE80211_DEV_TO_SUB_IF(dev), req);
1993 }
1994
1995 static int ieee80211_disassoc(struct wiphy *wiphy, struct net_device *dev,
1996                               struct cfg80211_disassoc_request *req)
1997 {
1998         return ieee80211_mgd_disassoc(IEEE80211_DEV_TO_SUB_IF(dev), req);
1999 }
2000
2001 static int ieee80211_join_ibss(struct wiphy *wiphy, struct net_device *dev,
2002                                struct cfg80211_ibss_params *params)
2003 {
2004         return ieee80211_ibss_join(IEEE80211_DEV_TO_SUB_IF(dev), params);
2005 }
2006
2007 static int ieee80211_leave_ibss(struct wiphy *wiphy, struct net_device *dev)
2008 {
2009         return ieee80211_ibss_leave(IEEE80211_DEV_TO_SUB_IF(dev));
2010 }
2011
2012 static int ieee80211_join_ocb(struct wiphy *wiphy, struct net_device *dev,
2013                               struct ocb_setup *setup)
2014 {
2015         return ieee80211_ocb_join(IEEE80211_DEV_TO_SUB_IF(dev), setup);
2016 }
2017
2018 static int ieee80211_leave_ocb(struct wiphy *wiphy, struct net_device *dev)
2019 {
2020         return ieee80211_ocb_leave(IEEE80211_DEV_TO_SUB_IF(dev));
2021 }
2022
2023 static int ieee80211_set_mcast_rate(struct wiphy *wiphy, struct net_device *dev,
2024                                     int rate[IEEE80211_NUM_BANDS])
2025 {
2026         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2027
2028         memcpy(sdata->vif.bss_conf.mcast_rate, rate,
2029                sizeof(int) * IEEE80211_NUM_BANDS);
2030
2031         return 0;
2032 }
2033
2034 static int ieee80211_set_wiphy_params(struct wiphy *wiphy, u32 changed)
2035 {
2036         struct ieee80211_local *local = wiphy_priv(wiphy);
2037         int err;
2038
2039         if (changed & WIPHY_PARAM_FRAG_THRESHOLD) {
2040                 ieee80211_check_fast_xmit_all(local);
2041
2042                 err = drv_set_frag_threshold(local, wiphy->frag_threshold);
2043
2044                 if (err) {
2045                         ieee80211_check_fast_xmit_all(local);
2046                         return err;
2047                 }
2048         }
2049
2050         if ((changed & WIPHY_PARAM_COVERAGE_CLASS) ||
2051             (changed & WIPHY_PARAM_DYN_ACK)) {
2052                 s16 coverage_class;
2053
2054                 coverage_class = changed & WIPHY_PARAM_COVERAGE_CLASS ?
2055                                         wiphy->coverage_class : -1;
2056                 err = drv_set_coverage_class(local, coverage_class);
2057
2058                 if (err)
2059                         return err;
2060         }
2061
2062         if (changed & WIPHY_PARAM_RTS_THRESHOLD) {
2063                 err = drv_set_rts_threshold(local, wiphy->rts_threshold);
2064
2065                 if (err)
2066                         return err;
2067         }
2068
2069         if (changed & WIPHY_PARAM_RETRY_SHORT) {
2070                 if (wiphy->retry_short > IEEE80211_MAX_TX_RETRY)
2071                         return -EINVAL;
2072                 local->hw.conf.short_frame_max_tx_count = wiphy->retry_short;
2073         }
2074         if (changed & WIPHY_PARAM_RETRY_LONG) {
2075                 if (wiphy->retry_long > IEEE80211_MAX_TX_RETRY)
2076                         return -EINVAL;
2077                 local->hw.conf.long_frame_max_tx_count = wiphy->retry_long;
2078         }
2079         if (changed &
2080             (WIPHY_PARAM_RETRY_SHORT | WIPHY_PARAM_RETRY_LONG))
2081                 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_RETRY_LIMITS);
2082
2083         return 0;
2084 }
2085
2086 static int ieee80211_set_tx_power(struct wiphy *wiphy,
2087                                   struct wireless_dev *wdev,
2088                                   enum nl80211_tx_power_setting type, int mbm)
2089 {
2090         struct ieee80211_local *local = wiphy_priv(wiphy);
2091         struct ieee80211_sub_if_data *sdata;
2092         enum nl80211_tx_power_setting txp_type = type;
2093         bool update_txp_type = false;
2094
2095         if (wdev) {
2096                 sdata = IEEE80211_WDEV_TO_SUB_IF(wdev);
2097
2098                 switch (type) {
2099                 case NL80211_TX_POWER_AUTOMATIC:
2100                         sdata->user_power_level = IEEE80211_UNSET_POWER_LEVEL;
2101                         txp_type = NL80211_TX_POWER_LIMITED;
2102                         break;
2103                 case NL80211_TX_POWER_LIMITED:
2104                 case NL80211_TX_POWER_FIXED:
2105                         if (mbm < 0 || (mbm % 100))
2106                                 return -EOPNOTSUPP;
2107                         sdata->user_power_level = MBM_TO_DBM(mbm);
2108                         break;
2109                 }
2110
2111                 if (txp_type != sdata->vif.bss_conf.txpower_type) {
2112                         update_txp_type = true;
2113                         sdata->vif.bss_conf.txpower_type = txp_type;
2114                 }
2115
2116                 ieee80211_recalc_txpower(sdata, update_txp_type);
2117
2118                 return 0;
2119         }
2120
2121         switch (type) {
2122         case NL80211_TX_POWER_AUTOMATIC:
2123                 local->user_power_level = IEEE80211_UNSET_POWER_LEVEL;
2124                 txp_type = NL80211_TX_POWER_LIMITED;
2125                 break;
2126         case NL80211_TX_POWER_LIMITED:
2127         case NL80211_TX_POWER_FIXED:
2128                 if (mbm < 0 || (mbm % 100))
2129                         return -EOPNOTSUPP;
2130                 local->user_power_level = MBM_TO_DBM(mbm);
2131                 break;
2132         }
2133
2134         mutex_lock(&local->iflist_mtx);
2135         list_for_each_entry(sdata, &local->interfaces, list) {
2136                 sdata->user_power_level = local->user_power_level;
2137                 if (txp_type != sdata->vif.bss_conf.txpower_type)
2138                         update_txp_type = true;
2139                 sdata->vif.bss_conf.txpower_type = txp_type;
2140         }
2141         list_for_each_entry(sdata, &local->interfaces, list)
2142                 ieee80211_recalc_txpower(sdata, update_txp_type);
2143         mutex_unlock(&local->iflist_mtx);
2144
2145         return 0;
2146 }
2147
2148 static int ieee80211_get_tx_power(struct wiphy *wiphy,
2149                                   struct wireless_dev *wdev,
2150                                   int *dbm)
2151 {
2152         struct ieee80211_local *local = wiphy_priv(wiphy);
2153         struct ieee80211_sub_if_data *sdata = IEEE80211_WDEV_TO_SUB_IF(wdev);
2154
2155         if (local->ops->get_txpower)
2156                 return drv_get_txpower(local, sdata, dbm);
2157
2158         if (!local->use_chanctx)
2159                 *dbm = local->hw.conf.power_level;
2160         else
2161                 *dbm = sdata->vif.bss_conf.txpower;
2162
2163         return 0;
2164 }
2165
2166 static int ieee80211_set_wds_peer(struct wiphy *wiphy, struct net_device *dev,
2167                                   const u8 *addr)
2168 {
2169         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2170
2171         memcpy(&sdata->u.wds.remote_addr, addr, ETH_ALEN);
2172
2173         return 0;
2174 }
2175
2176 static void ieee80211_rfkill_poll(struct wiphy *wiphy)
2177 {
2178         struct ieee80211_local *local = wiphy_priv(wiphy);
2179
2180         drv_rfkill_poll(local);
2181 }
2182
2183 #ifdef CONFIG_NL80211_TESTMODE
2184 static int ieee80211_testmode_cmd(struct wiphy *wiphy,
2185                                   struct wireless_dev *wdev,
2186                                   void *data, int len)
2187 {
2188         struct ieee80211_local *local = wiphy_priv(wiphy);
2189         struct ieee80211_vif *vif = NULL;
2190
2191         if (!local->ops->testmode_cmd)
2192                 return -EOPNOTSUPP;
2193
2194         if (wdev) {
2195                 struct ieee80211_sub_if_data *sdata;
2196
2197                 sdata = IEEE80211_WDEV_TO_SUB_IF(wdev);
2198                 if (sdata->flags & IEEE80211_SDATA_IN_DRIVER)
2199                         vif = &sdata->vif;
2200         }
2201
2202         return local->ops->testmode_cmd(&local->hw, vif, data, len);
2203 }
2204
2205 static int ieee80211_testmode_dump(struct wiphy *wiphy,
2206                                    struct sk_buff *skb,
2207                                    struct netlink_callback *cb,
2208                                    void *data, int len)
2209 {
2210         struct ieee80211_local *local = wiphy_priv(wiphy);
2211
2212         if (!local->ops->testmode_dump)
2213                 return -EOPNOTSUPP;
2214
2215         return local->ops->testmode_dump(&local->hw, skb, cb, data, len);
2216 }
2217 #endif
2218
2219 int __ieee80211_request_smps_ap(struct ieee80211_sub_if_data *sdata,
2220                                 enum ieee80211_smps_mode smps_mode)
2221 {
2222         struct sta_info *sta;
2223         enum ieee80211_smps_mode old_req;
2224
2225         if (WARN_ON_ONCE(sdata->vif.type != NL80211_IFTYPE_AP))
2226                 return -EINVAL;
2227
2228         if (sdata->vif.bss_conf.chandef.width == NL80211_CHAN_WIDTH_20_NOHT)
2229                 return 0;
2230
2231         old_req = sdata->u.ap.req_smps;
2232         sdata->u.ap.req_smps = smps_mode;
2233
2234         /* AUTOMATIC doesn't mean much for AP - don't allow it */
2235         if (old_req == smps_mode ||
2236             smps_mode == IEEE80211_SMPS_AUTOMATIC)
2237                 return 0;
2238
2239          /* If no associated stations, there's no need to do anything */
2240         if (!atomic_read(&sdata->u.ap.num_mcast_sta)) {
2241                 sdata->smps_mode = smps_mode;
2242                 ieee80211_queue_work(&sdata->local->hw, &sdata->recalc_smps);
2243                 return 0;
2244         }
2245
2246         ht_dbg(sdata,
2247                "SMPS %d requested in AP mode, sending Action frame to %d stations\n",
2248                smps_mode, atomic_read(&sdata->u.ap.num_mcast_sta));
2249
2250         mutex_lock(&sdata->local->sta_mtx);
2251         list_for_each_entry(sta, &sdata->local->sta_list, list) {
2252                 /*
2253                  * Only stations associated to our AP and
2254                  * associated VLANs
2255                  */
2256                 if (sta->sdata->bss != &sdata->u.ap)
2257                         continue;
2258
2259                 /* This station doesn't support MIMO - skip it */
2260                 if (sta_info_tx_streams(sta) == 1)
2261                         continue;
2262
2263                 /*
2264                  * Don't wake up a STA just to send the action frame
2265                  * unless we are getting more restrictive.
2266                  */
2267                 if (test_sta_flag(sta, WLAN_STA_PS_STA) &&
2268                     !ieee80211_smps_is_restrictive(sta->known_smps_mode,
2269                                                    smps_mode)) {
2270                         ht_dbg(sdata, "Won't send SMPS to sleeping STA %pM\n",
2271                                sta->sta.addr);
2272                         continue;
2273                 }
2274
2275                 /*
2276                  * If the STA is not authorized, wait until it gets
2277                  * authorized and the action frame will be sent then.
2278                  */
2279                 if (!test_sta_flag(sta, WLAN_STA_AUTHORIZED))
2280                         continue;
2281
2282                 ht_dbg(sdata, "Sending SMPS to %pM\n", sta->sta.addr);
2283                 ieee80211_send_smps_action(sdata, smps_mode, sta->sta.addr,
2284                                            sdata->vif.bss_conf.bssid);
2285         }
2286         mutex_unlock(&sdata->local->sta_mtx);
2287
2288         sdata->smps_mode = smps_mode;
2289         ieee80211_queue_work(&sdata->local->hw, &sdata->recalc_smps);
2290
2291         return 0;
2292 }
2293
2294 int __ieee80211_request_smps_mgd(struct ieee80211_sub_if_data *sdata,
2295                                  enum ieee80211_smps_mode smps_mode)
2296 {
2297         const u8 *ap;
2298         enum ieee80211_smps_mode old_req;
2299         int err;
2300         struct sta_info *sta;
2301         bool tdls_peer_found = false;
2302
2303         lockdep_assert_held(&sdata->wdev.mtx);
2304
2305         if (WARN_ON_ONCE(sdata->vif.type != NL80211_IFTYPE_STATION))
2306                 return -EINVAL;
2307
2308         old_req = sdata->u.mgd.req_smps;
2309         sdata->u.mgd.req_smps = smps_mode;
2310
2311         if (old_req == smps_mode &&
2312             smps_mode != IEEE80211_SMPS_AUTOMATIC)
2313                 return 0;
2314
2315         /*
2316          * If not associated, or current association is not an HT
2317          * association, there's no need to do anything, just store
2318          * the new value until we associate.
2319          */
2320         if (!sdata->u.mgd.associated ||
2321             sdata->vif.bss_conf.chandef.width == NL80211_CHAN_WIDTH_20_NOHT)
2322                 return 0;
2323
2324         ap = sdata->u.mgd.associated->bssid;
2325
2326         rcu_read_lock();
2327         list_for_each_entry_rcu(sta, &sdata->local->sta_list, list) {
2328                 if (!sta->sta.tdls || sta->sdata != sdata || !sta->uploaded ||
2329                     !test_sta_flag(sta, WLAN_STA_AUTHORIZED))
2330                         continue;
2331
2332                 tdls_peer_found = true;
2333                 break;
2334         }
2335         rcu_read_unlock();
2336
2337         if (smps_mode == IEEE80211_SMPS_AUTOMATIC) {
2338                 if (tdls_peer_found || !sdata->u.mgd.powersave)
2339                         smps_mode = IEEE80211_SMPS_OFF;
2340                 else
2341                         smps_mode = IEEE80211_SMPS_DYNAMIC;
2342         }
2343
2344         /* send SM PS frame to AP */
2345         err = ieee80211_send_smps_action(sdata, smps_mode,
2346                                          ap, ap);
2347         if (err)
2348                 sdata->u.mgd.req_smps = old_req;
2349         else if (smps_mode != IEEE80211_SMPS_OFF && tdls_peer_found)
2350                 ieee80211_teardown_tdls_peers(sdata);
2351
2352         return err;
2353 }
2354
2355 static int ieee80211_set_power_mgmt(struct wiphy *wiphy, struct net_device *dev,
2356                                     bool enabled, int timeout)
2357 {
2358         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2359         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2360
2361         if (sdata->vif.type != NL80211_IFTYPE_STATION)
2362                 return -EOPNOTSUPP;
2363
2364         if (!ieee80211_hw_check(&local->hw, SUPPORTS_PS))
2365                 return -EOPNOTSUPP;
2366
2367         if (enabled == sdata->u.mgd.powersave &&
2368             timeout == local->dynamic_ps_forced_timeout)
2369                 return 0;
2370
2371         sdata->u.mgd.powersave = enabled;
2372         local->dynamic_ps_forced_timeout = timeout;
2373
2374         /* no change, but if automatic follow powersave */
2375         sdata_lock(sdata);
2376         __ieee80211_request_smps_mgd(sdata, sdata->u.mgd.req_smps);
2377         sdata_unlock(sdata);
2378
2379         if (ieee80211_hw_check(&local->hw, SUPPORTS_DYNAMIC_PS))
2380                 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
2381
2382         ieee80211_recalc_ps(local);
2383         ieee80211_recalc_ps_vif(sdata);
2384
2385         return 0;
2386 }
2387
2388 static int ieee80211_set_cqm_rssi_config(struct wiphy *wiphy,
2389                                          struct net_device *dev,
2390                                          s32 rssi_thold, u32 rssi_hyst)
2391 {
2392         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2393         struct ieee80211_vif *vif = &sdata->vif;
2394         struct ieee80211_bss_conf *bss_conf = &vif->bss_conf;
2395
2396         if (rssi_thold == bss_conf->cqm_rssi_thold &&
2397             rssi_hyst == bss_conf->cqm_rssi_hyst)
2398                 return 0;
2399
2400         if (sdata->vif.driver_flags & IEEE80211_VIF_BEACON_FILTER &&
2401             !(sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI))
2402                 return -EOPNOTSUPP;
2403
2404         bss_conf->cqm_rssi_thold = rssi_thold;
2405         bss_conf->cqm_rssi_hyst = rssi_hyst;
2406         sdata->u.mgd.last_cqm_event_signal = 0;
2407
2408         /* tell the driver upon association, unless already associated */
2409         if (sdata->u.mgd.associated &&
2410             sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI)
2411                 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_CQM);
2412
2413         return 0;
2414 }
2415
2416 static int ieee80211_set_bitrate_mask(struct wiphy *wiphy,
2417                                       struct net_device *dev,
2418                                       const u8 *addr,
2419                                       const struct cfg80211_bitrate_mask *mask)
2420 {
2421         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2422         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2423         int i, ret;
2424
2425         if (!ieee80211_sdata_running(sdata))
2426                 return -ENETDOWN;
2427
2428         if (ieee80211_hw_check(&local->hw, HAS_RATE_CONTROL)) {
2429                 ret = drv_set_bitrate_mask(local, sdata, mask);
2430                 if (ret)
2431                         return ret;
2432         }
2433
2434         for (i = 0; i < IEEE80211_NUM_BANDS; i++) {
2435                 struct ieee80211_supported_band *sband = wiphy->bands[i];
2436                 int j;
2437
2438                 sdata->rc_rateidx_mask[i] = mask->control[i].legacy;
2439                 memcpy(sdata->rc_rateidx_mcs_mask[i], mask->control[i].ht_mcs,
2440                        sizeof(mask->control[i].ht_mcs));
2441                 memcpy(sdata->rc_rateidx_vht_mcs_mask[i],
2442                        mask->control[i].vht_mcs,
2443                        sizeof(mask->control[i].vht_mcs));
2444
2445                 sdata->rc_has_mcs_mask[i] = false;
2446                 sdata->rc_has_vht_mcs_mask[i] = false;
2447                 if (!sband)
2448                         continue;
2449
2450                 for (j = 0; j < IEEE80211_HT_MCS_MASK_LEN; j++) {
2451                         if (sdata->rc_rateidx_mcs_mask[i][j] != 0xff) {
2452                                 sdata->rc_has_mcs_mask[i] = true;
2453                                 break;
2454                         }
2455                 }
2456
2457                 for (j = 0; j < NL80211_VHT_NSS_MAX; j++) {
2458                         if (sdata->rc_rateidx_vht_mcs_mask[i][j] != 0xffff) {
2459                                 sdata->rc_has_vht_mcs_mask[i] = true;
2460                                 break;
2461                         }
2462                 }
2463         }
2464
2465         return 0;
2466 }
2467
2468 static bool ieee80211_coalesce_started_roc(struct ieee80211_local *local,
2469                                            struct ieee80211_roc_work *new_roc,
2470                                            struct ieee80211_roc_work *cur_roc)
2471 {
2472         unsigned long now = jiffies;
2473         unsigned long remaining = cur_roc->hw_start_time +
2474                                   msecs_to_jiffies(cur_roc->duration) -
2475                                   now;
2476
2477         if (WARN_ON(!cur_roc->started || !cur_roc->hw_begun))
2478                 return false;
2479
2480         /* if it doesn't fit entirely, schedule a new one */
2481         if (new_roc->duration > jiffies_to_msecs(remaining))
2482                 return false;
2483
2484         ieee80211_handle_roc_started(new_roc);
2485
2486         /* add to dependents so we send the expired event properly */
2487         list_add_tail(&new_roc->list, &cur_roc->dependents);
2488         return true;
2489 }
2490
2491 static u64 ieee80211_mgmt_tx_cookie(struct ieee80211_local *local)
2492 {
2493         lockdep_assert_held(&local->mtx);
2494
2495         local->roc_cookie_counter++;
2496
2497         /* wow, you wrapped 64 bits ... more likely a bug */
2498         if (WARN_ON(local->roc_cookie_counter == 0))
2499                 local->roc_cookie_counter++;
2500
2501         return local->roc_cookie_counter;
2502 }
2503
2504 static int ieee80211_start_roc_work(struct ieee80211_local *local,
2505                                     struct ieee80211_sub_if_data *sdata,
2506                                     struct ieee80211_channel *channel,
2507                                     unsigned int duration, u64 *cookie,
2508                                     struct sk_buff *txskb,
2509                                     enum ieee80211_roc_type type)
2510 {
2511         struct ieee80211_roc_work *roc, *tmp;
2512         bool queued = false;
2513         int ret;
2514
2515         lockdep_assert_held(&local->mtx);
2516
2517         if (local->use_chanctx && !local->ops->remain_on_channel)
2518                 return -EOPNOTSUPP;
2519
2520         roc = kzalloc(sizeof(*roc), GFP_KERNEL);
2521         if (!roc)
2522                 return -ENOMEM;
2523
2524         /*
2525          * If the duration is zero, then the driver
2526          * wouldn't actually do anything. Set it to
2527          * 10 for now.
2528          *
2529          * TODO: cancel the off-channel operation
2530          *       when we get the SKB's TX status and
2531          *       the wait time was zero before.
2532          */
2533         if (!duration)
2534                 duration = 10;
2535
2536         roc->chan = channel;
2537         roc->duration = duration;
2538         roc->req_duration = duration;
2539         roc->frame = txskb;
2540         roc->type = type;
2541         roc->sdata = sdata;
2542         INIT_DELAYED_WORK(&roc->work, ieee80211_sw_roc_work);
2543         INIT_LIST_HEAD(&roc->dependents);
2544
2545         /*
2546          * cookie is either the roc cookie (for normal roc)
2547          * or the SKB (for mgmt TX)
2548          */
2549         if (!txskb) {
2550                 roc->cookie = ieee80211_mgmt_tx_cookie(local);
2551                 *cookie = roc->cookie;
2552         } else {
2553                 roc->mgmt_tx_cookie = *cookie;
2554         }
2555
2556         /* if there's one pending or we're scanning, queue this one */
2557         if (!list_empty(&local->roc_list) ||
2558             local->scanning || ieee80211_is_radar_required(local))
2559                 goto out_check_combine;
2560
2561         /* if not HW assist, just queue & schedule work */
2562         if (!local->ops->remain_on_channel) {
2563                 ieee80211_queue_delayed_work(&local->hw, &roc->work, 0);
2564                 goto out_queue;
2565         }
2566
2567         /* otherwise actually kick it off here (for error handling) */
2568
2569         ret = drv_remain_on_channel(local, sdata, channel, duration, type);
2570         if (ret) {
2571                 kfree(roc);
2572                 return ret;
2573         }
2574
2575         roc->started = true;
2576         goto out_queue;
2577
2578  out_check_combine:
2579         list_for_each_entry(tmp, &local->roc_list, list) {
2580                 if (tmp->chan != channel || tmp->sdata != sdata)
2581                         continue;
2582
2583                 /*
2584                  * Extend this ROC if possible:
2585                  *
2586                  * If it hasn't started yet, just increase the duration
2587                  * and add the new one to the list of dependents.
2588                  * If the type of the new ROC has higher priority, modify the
2589                  * type of the previous one to match that of the new one.
2590                  */
2591                 if (!tmp->started) {
2592                         list_add_tail(&roc->list, &tmp->dependents);
2593                         tmp->duration = max(tmp->duration, roc->duration);
2594                         tmp->type = max(tmp->type, roc->type);
2595                         queued = true;
2596                         break;
2597                 }
2598
2599                 /* If it has already started, it's more difficult ... */
2600                 if (local->ops->remain_on_channel) {
2601                         /*
2602                          * In the offloaded ROC case, if it hasn't begun, add
2603                          * this new one to the dependent list to be handled
2604                          * when the master one begins. If it has begun,
2605                          * check if it fits entirely within the existing one,
2606                          * in which case it will just be dependent as well.
2607                          * Otherwise, schedule it by itself.
2608                          */
2609                         if (!tmp->hw_begun) {
2610                                 list_add_tail(&roc->list, &tmp->dependents);
2611                                 queued = true;
2612                                 break;
2613                         }
2614
2615                         if (ieee80211_coalesce_started_roc(local, roc, tmp))
2616                                 queued = true;
2617                 } else if (del_timer_sync(&tmp->work.timer)) {
2618                         unsigned long new_end;
2619
2620                         /*
2621                          * In the software ROC case, cancel the timer, if
2622                          * that fails then the finish work is already
2623                          * queued/pending and thus we queue the new ROC
2624                          * normally, if that succeeds then we can extend
2625                          * the timer duration and TX the frame (if any.)
2626                          */
2627
2628                         list_add_tail(&roc->list, &tmp->dependents);
2629                         queued = true;
2630
2631                         new_end = jiffies + msecs_to_jiffies(roc->duration);
2632
2633                         /* ok, it was started & we canceled timer */
2634                         if (time_after(new_end, tmp->work.timer.expires))
2635                                 mod_timer(&tmp->work.timer, new_end);
2636                         else
2637                                 add_timer(&tmp->work.timer);
2638
2639                         ieee80211_handle_roc_started(roc);
2640                 }
2641                 break;
2642         }
2643
2644  out_queue:
2645         if (!queued)
2646                 list_add_tail(&roc->list, &local->roc_list);
2647
2648         return 0;
2649 }
2650
2651 static int ieee80211_remain_on_channel(struct wiphy *wiphy,
2652                                        struct wireless_dev *wdev,
2653                                        struct ieee80211_channel *chan,
2654                                        unsigned int duration,
2655                                        u64 *cookie)
2656 {
2657         struct ieee80211_sub_if_data *sdata = IEEE80211_WDEV_TO_SUB_IF(wdev);
2658         struct ieee80211_local *local = sdata->local;
2659         int ret;
2660
2661         mutex_lock(&local->mtx);
2662         ret = ieee80211_start_roc_work(local, sdata, chan,
2663                                        duration, cookie, NULL,
2664                                        IEEE80211_ROC_TYPE_NORMAL);
2665         mutex_unlock(&local->mtx);
2666
2667         return ret;
2668 }
2669
2670 static int ieee80211_cancel_roc(struct ieee80211_local *local,
2671                                 u64 cookie, bool mgmt_tx)
2672 {
2673         struct ieee80211_roc_work *roc, *tmp, *found = NULL;
2674         int ret;
2675
2676         mutex_lock(&local->mtx);
2677         list_for_each_entry_safe(roc, tmp, &local->roc_list, list) {
2678                 struct ieee80211_roc_work *dep, *tmp2;
2679
2680                 list_for_each_entry_safe(dep, tmp2, &roc->dependents, list) {
2681                         if (!mgmt_tx && dep->cookie != cookie)
2682                                 continue;
2683                         else if (mgmt_tx && dep->mgmt_tx_cookie != cookie)
2684                                 continue;
2685                         /* found dependent item -- just remove it */
2686                         list_del(&dep->list);
2687                         mutex_unlock(&local->mtx);
2688
2689                         ieee80211_roc_notify_destroy(dep, true);
2690                         return 0;
2691                 }
2692
2693                 if (!mgmt_tx && roc->cookie != cookie)
2694                         continue;
2695                 else if (mgmt_tx && roc->mgmt_tx_cookie != cookie)
2696                         continue;
2697
2698                 found = roc;
2699                 break;
2700         }
2701
2702         if (!found) {
2703                 mutex_unlock(&local->mtx);
2704                 return -ENOENT;
2705         }
2706
2707         /*
2708          * We found the item to cancel, so do that. Note that it
2709          * may have dependents, which we also cancel (and send
2710          * the expired signal for.) Not doing so would be quite
2711          * tricky here, but we may need to fix it later.
2712          */
2713
2714         if (local->ops->remain_on_channel) {
2715                 if (found->started) {
2716                         ret = drv_cancel_remain_on_channel(local);
2717                         if (WARN_ON_ONCE(ret)) {
2718                                 mutex_unlock(&local->mtx);
2719                                 return ret;
2720                         }
2721                 }
2722
2723                 list_del(&found->list);
2724
2725                 if (found->started)
2726                         ieee80211_start_next_roc(local);
2727                 mutex_unlock(&local->mtx);
2728
2729                 ieee80211_roc_notify_destroy(found, true);
2730         } else {
2731                 /* work may be pending so use it all the time */
2732                 found->abort = true;
2733                 ieee80211_queue_delayed_work(&local->hw, &found->work, 0);
2734
2735                 mutex_unlock(&local->mtx);
2736
2737                 /* work will clean up etc */
2738                 flush_delayed_work(&found->work);
2739                 WARN_ON(!found->to_be_freed);
2740                 kfree(found);
2741         }
2742
2743         return 0;
2744 }
2745
2746 static int ieee80211_cancel_remain_on_channel(struct wiphy *wiphy,
2747                                               struct wireless_dev *wdev,
2748                                               u64 cookie)
2749 {
2750         struct ieee80211_sub_if_data *sdata = IEEE80211_WDEV_TO_SUB_IF(wdev);
2751         struct ieee80211_local *local = sdata->local;
2752
2753         return ieee80211_cancel_roc(local, cookie, false);
2754 }
2755
2756 static int ieee80211_start_radar_detection(struct wiphy *wiphy,
2757                                            struct net_device *dev,
2758                                            struct cfg80211_chan_def *chandef,
2759                                            u32 cac_time_ms)
2760 {
2761         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2762         struct ieee80211_local *local = sdata->local;
2763         int err;
2764
2765         mutex_lock(&local->mtx);
2766         if (!list_empty(&local->roc_list) || local->scanning) {
2767                 err = -EBUSY;
2768                 goto out_unlock;
2769         }
2770
2771         /* whatever, but channel contexts should not complain about that one */
2772         sdata->smps_mode = IEEE80211_SMPS_OFF;
2773         sdata->needed_rx_chains = local->rx_chains;
2774
2775         err = ieee80211_vif_use_channel(sdata, chandef,
2776                                         IEEE80211_CHANCTX_SHARED);
2777         if (err)
2778                 goto out_unlock;
2779
2780         ieee80211_queue_delayed_work(&sdata->local->hw,
2781                                      &sdata->dfs_cac_timer_work,
2782                                      msecs_to_jiffies(cac_time_ms));
2783
2784  out_unlock:
2785         mutex_unlock(&local->mtx);
2786         return err;
2787 }
2788
2789 static struct cfg80211_beacon_data *
2790 cfg80211_beacon_dup(struct cfg80211_beacon_data *beacon)
2791 {
2792         struct cfg80211_beacon_data *new_beacon;
2793         u8 *pos;
2794         int len;
2795
2796         len = beacon->head_len + beacon->tail_len + beacon->beacon_ies_len +
2797               beacon->proberesp_ies_len + beacon->assocresp_ies_len +
2798               beacon->probe_resp_len;
2799
2800         new_beacon = kzalloc(sizeof(*new_beacon) + len, GFP_KERNEL);
2801         if (!new_beacon)
2802                 return NULL;
2803
2804         pos = (u8 *)(new_beacon + 1);
2805         if (beacon->head_len) {
2806                 new_beacon->head_len = beacon->head_len;
2807                 new_beacon->head = pos;
2808                 memcpy(pos, beacon->head, beacon->head_len);
2809                 pos += beacon->head_len;
2810         }
2811         if (beacon->tail_len) {
2812                 new_beacon->tail_len = beacon->tail_len;
2813                 new_beacon->tail = pos;
2814                 memcpy(pos, beacon->tail, beacon->tail_len);
2815                 pos += beacon->tail_len;
2816         }
2817         if (beacon->beacon_ies_len) {
2818                 new_beacon->beacon_ies_len = beacon->beacon_ies_len;
2819                 new_beacon->beacon_ies = pos;
2820                 memcpy(pos, beacon->beacon_ies, beacon->beacon_ies_len);
2821                 pos += beacon->beacon_ies_len;
2822         }
2823         if (beacon->proberesp_ies_len) {
2824                 new_beacon->proberesp_ies_len = beacon->proberesp_ies_len;
2825                 new_beacon->proberesp_ies = pos;
2826                 memcpy(pos, beacon->proberesp_ies, beacon->proberesp_ies_len);
2827                 pos += beacon->proberesp_ies_len;
2828         }
2829         if (beacon->assocresp_ies_len) {
2830                 new_beacon->assocresp_ies_len = beacon->assocresp_ies_len;
2831                 new_beacon->assocresp_ies = pos;
2832                 memcpy(pos, beacon->assocresp_ies, beacon->assocresp_ies_len);
2833                 pos += beacon->assocresp_ies_len;
2834         }
2835         if (beacon->probe_resp_len) {
2836                 new_beacon->probe_resp_len = beacon->probe_resp_len;
2837                 new_beacon->probe_resp = pos;
2838                 memcpy(pos, beacon->probe_resp, beacon->probe_resp_len);
2839                 pos += beacon->probe_resp_len;
2840         }
2841
2842         return new_beacon;
2843 }
2844
2845 void ieee80211_csa_finish(struct ieee80211_vif *vif)
2846 {
2847         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2848
2849         ieee80211_queue_work(&sdata->local->hw,
2850                              &sdata->csa_finalize_work);
2851 }
2852 EXPORT_SYMBOL(ieee80211_csa_finish);
2853
2854 static int ieee80211_set_after_csa_beacon(struct ieee80211_sub_if_data *sdata,
2855                                           u32 *changed)
2856 {
2857         int err;
2858
2859         switch (sdata->vif.type) {
2860         case NL80211_IFTYPE_AP:
2861                 err = ieee80211_assign_beacon(sdata, sdata->u.ap.next_beacon,
2862                                               NULL);
2863                 kfree(sdata->u.ap.next_beacon);
2864                 sdata->u.ap.next_beacon = NULL;
2865
2866                 if (err < 0)
2867                         return err;
2868                 *changed |= err;
2869                 break;
2870         case NL80211_IFTYPE_ADHOC:
2871                 err = ieee80211_ibss_finish_csa(sdata);
2872                 if (err < 0)
2873                         return err;
2874                 *changed |= err;
2875                 break;
2876 #ifdef CONFIG_MAC80211_MESH
2877         case NL80211_IFTYPE_MESH_POINT:
2878                 err = ieee80211_mesh_finish_csa(sdata);
2879                 if (err < 0)
2880                         return err;
2881                 *changed |= err;
2882                 break;
2883 #endif
2884         default:
2885                 WARN_ON(1);
2886                 return -EINVAL;
2887         }
2888
2889         return 0;
2890 }
2891
2892 static int __ieee80211_csa_finalize(struct ieee80211_sub_if_data *sdata)
2893 {
2894         struct ieee80211_local *local = sdata->local;
2895         u32 changed = 0;
2896         int err;
2897
2898         sdata_assert_lock(sdata);
2899         lockdep_assert_held(&local->mtx);
2900         lockdep_assert_held(&local->chanctx_mtx);
2901
2902         /*
2903          * using reservation isn't immediate as it may be deferred until later
2904          * with multi-vif. once reservation is complete it will re-schedule the
2905          * work with no reserved_chanctx so verify chandef to check if it
2906          * completed successfully
2907          */
2908
2909         if (sdata->reserved_chanctx) {
2910                 /*
2911                  * with multi-vif csa driver may call ieee80211_csa_finish()
2912                  * many times while waiting for other interfaces to use their
2913                  * reservations
2914                  */
2915                 if (sdata->reserved_ready)
2916                         return 0;
2917
2918                 return ieee80211_vif_use_reserved_context(sdata);
2919         }
2920
2921         if (!cfg80211_chandef_identical(&sdata->vif.bss_conf.chandef,
2922                                         &sdata->csa_chandef))
2923                 return -EINVAL;
2924
2925         sdata->vif.csa_active = false;
2926
2927         err = ieee80211_set_after_csa_beacon(sdata, &changed);
2928         if (err)
2929                 return err;
2930
2931         ieee80211_bss_info_change_notify(sdata, changed);
2932
2933         if (sdata->csa_block_tx) {
2934                 ieee80211_wake_vif_queues(local, sdata,
2935                                           IEEE80211_QUEUE_STOP_REASON_CSA);
2936                 sdata->csa_block_tx = false;
2937         }
2938
2939         err = drv_post_channel_switch(sdata);
2940         if (err)
2941                 return err;
2942
2943         cfg80211_ch_switch_notify(sdata->dev, &sdata->csa_chandef);
2944
2945         return 0;
2946 }
2947
2948 static void ieee80211_csa_finalize(struct ieee80211_sub_if_data *sdata)
2949 {
2950         if (__ieee80211_csa_finalize(sdata)) {
2951                 sdata_info(sdata, "failed to finalize CSA, disconnecting\n");
2952                 cfg80211_stop_iface(sdata->local->hw.wiphy, &sdata->wdev,
2953                                     GFP_KERNEL);
2954         }
2955 }
2956
2957 void ieee80211_csa_finalize_work(struct work_struct *work)
2958 {
2959         struct ieee80211_sub_if_data *sdata =
2960                 container_of(work, struct ieee80211_sub_if_data,
2961                              csa_finalize_work);
2962         struct ieee80211_local *local = sdata->local;
2963
2964         sdata_lock(sdata);
2965         mutex_lock(&local->mtx);
2966         mutex_lock(&local->chanctx_mtx);
2967
2968         /* AP might have been stopped while waiting for the lock. */
2969         if (!sdata->vif.csa_active)
2970                 goto unlock;
2971
2972         if (!ieee80211_sdata_running(sdata))
2973                 goto unlock;
2974
2975         ieee80211_csa_finalize(sdata);
2976
2977 unlock:
2978         mutex_unlock(&local->chanctx_mtx);
2979         mutex_unlock(&local->mtx);
2980         sdata_unlock(sdata);
2981 }
2982
2983 static int ieee80211_set_csa_beacon(struct ieee80211_sub_if_data *sdata,
2984                                     struct cfg80211_csa_settings *params,
2985                                     u32 *changed)
2986 {
2987         struct ieee80211_csa_settings csa = {};
2988         int err;
2989
2990         switch (sdata->vif.type) {
2991         case NL80211_IFTYPE_AP:
2992                 sdata->u.ap.next_beacon =
2993                         cfg80211_beacon_dup(&params->beacon_after);
2994                 if (!sdata->u.ap.next_beacon)
2995                         return -ENOMEM;
2996
2997                 /*
2998                  * With a count of 0, we don't have to wait for any
2999                  * TBTT before switching, so complete the CSA
3000                  * immediately.  In theory, with a count == 1 we
3001                  * should delay the switch until just before the next
3002                  * TBTT, but that would complicate things so we switch
3003                  * immediately too.  If we would delay the switch
3004                  * until the next TBTT, we would have to set the probe
3005                  * response here.
3006                  *
3007                  * TODO: A channel switch with count <= 1 without
3008                  * sending a CSA action frame is kind of useless,
3009                  * because the clients won't know we're changing
3010                  * channels.  The action frame must be implemented
3011                  * either here or in the userspace.
3012                  */
3013                 if (params->count <= 1)
3014                         break;
3015
3016                 if ((params->n_counter_offsets_beacon >
3017                      IEEE80211_MAX_CSA_COUNTERS_NUM) ||
3018                     (params->n_counter_offsets_presp >
3019                      IEEE80211_MAX_CSA_COUNTERS_NUM))
3020                         return -EINVAL;
3021
3022                 csa.counter_offsets_beacon = params->counter_offsets_beacon;
3023                 csa.counter_offsets_presp = params->counter_offsets_presp;
3024                 csa.n_counter_offsets_beacon = params->n_counter_offsets_beacon;
3025                 csa.n_counter_offsets_presp = params->n_counter_offsets_presp;
3026                 csa.count = params->count;
3027
3028                 err = ieee80211_assign_beacon(sdata, &params->beacon_csa, &csa);
3029                 if (err < 0) {
3030                         kfree(sdata->u.ap.next_beacon);
3031                         return err;
3032                 }
3033                 *changed |= err;
3034
3035                 break;
3036         case NL80211_IFTYPE_ADHOC:
3037                 if (!sdata->vif.bss_conf.ibss_joined)
3038                         return -EINVAL;
3039
3040                 if (params->chandef.width != sdata->u.ibss.chandef.width)
3041                         return -EINVAL;
3042
3043                 switch (params->chandef.width) {
3044                 case NL80211_CHAN_WIDTH_40:
3045                         if (cfg80211_get_chandef_type(&params->chandef) !=
3046                             cfg80211_get_chandef_type(&sdata->u.ibss.chandef))
3047                                 return -EINVAL;
3048                 case NL80211_CHAN_WIDTH_5:
3049                 case NL80211_CHAN_WIDTH_10:
3050                 case NL80211_CHAN_WIDTH_20_NOHT:
3051                 case NL80211_CHAN_WIDTH_20:
3052                         break;
3053                 default:
3054                         return -EINVAL;
3055                 }
3056
3057                 /* changes into another band are not supported */
3058                 if (sdata->u.ibss.chandef.chan->band !=
3059                     params->chandef.chan->band)
3060                         return -EINVAL;
3061
3062                 /* see comments in the NL80211_IFTYPE_AP block */
3063                 if (params->count > 1) {
3064                         err = ieee80211_ibss_csa_beacon(sdata, params);
3065                         if (err < 0)
3066                                 return err;
3067                         *changed |= err;
3068                 }
3069
3070                 ieee80211_send_action_csa(sdata, params);
3071
3072                 break;
3073 #ifdef CONFIG_MAC80211_MESH
3074         case NL80211_IFTYPE_MESH_POINT: {
3075                 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
3076
3077                 if (params->chandef.width != sdata->vif.bss_conf.chandef.width)
3078                         return -EINVAL;
3079
3080                 /* changes into another band are not supported */
3081                 if (sdata->vif.bss_conf.chandef.chan->band !=
3082                     params->chandef.chan->band)
3083                         return -EINVAL;
3084
3085                 if (ifmsh->csa_role == IEEE80211_MESH_CSA_ROLE_NONE) {
3086                         ifmsh->csa_role = IEEE80211_MESH_CSA_ROLE_INIT;
3087                         if (!ifmsh->pre_value)
3088                                 ifmsh->pre_value = 1;
3089                         else
3090                                 ifmsh->pre_value++;
3091                 }
3092
3093                 /* see comments in the NL80211_IFTYPE_AP block */
3094                 if (params->count > 1) {
3095                         err = ieee80211_mesh_csa_beacon(sdata, params);
3096                         if (err < 0) {
3097                                 ifmsh->csa_role = IEEE80211_MESH_CSA_ROLE_NONE;
3098                                 return err;
3099                         }
3100                         *changed |= err;
3101                 }
3102
3103                 if (ifmsh->csa_role == IEEE80211_MESH_CSA_ROLE_INIT)
3104                         ieee80211_send_action_csa(sdata, params);
3105
3106                 break;
3107                 }
3108 #endif
3109         default:
3110                 return -EOPNOTSUPP;
3111         }
3112
3113         return 0;
3114 }
3115
3116 static int
3117 __ieee80211_channel_switch(struct wiphy *wiphy, struct net_device *dev,
3118                            struct cfg80211_csa_settings *params)
3119 {
3120         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3121         struct ieee80211_local *local = sdata->local;
3122         struct ieee80211_channel_switch ch_switch;
3123         struct ieee80211_chanctx_conf *conf;
3124         struct ieee80211_chanctx *chanctx;
3125         u32 changed = 0;
3126         int err;
3127
3128         sdata_assert_lock(sdata);
3129         lockdep_assert_held(&local->mtx);
3130
3131         if (!list_empty(&local->roc_list) || local->scanning)
3132                 return -EBUSY;
3133
3134         if (sdata->wdev.cac_started)
3135                 return -EBUSY;
3136
3137         if (cfg80211_chandef_identical(&params->chandef,
3138                                        &sdata->vif.bss_conf.chandef))
3139                 return -EINVAL;
3140
3141         /* don't allow another channel switch if one is already active. */
3142         if (sdata->vif.csa_active)
3143                 return -EBUSY;
3144
3145         mutex_lock(&local->chanctx_mtx);
3146         conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
3147                                          lockdep_is_held(&local->chanctx_mtx));
3148         if (!conf) {
3149                 err = -EBUSY;
3150                 goto out;
3151         }
3152
3153         chanctx = container_of(conf, struct ieee80211_chanctx, conf);
3154         if (!chanctx) {
3155                 err = -EBUSY;
3156                 goto out;
3157         }
3158
3159         ch_switch.timestamp = 0;
3160         ch_switch.device_timestamp = 0;
3161         ch_switch.block_tx = params->block_tx;
3162         ch_switch.chandef = params->chandef;
3163         ch_switch.count = params->count;
3164
3165         err = drv_pre_channel_switch(sdata, &ch_switch);
3166         if (err)
3167                 goto out;
3168
3169         err = ieee80211_vif_reserve_chanctx(sdata, &params->chandef,
3170                                             chanctx->mode,
3171                                             params->radar_required);
3172         if (err)
3173                 goto out;
3174
3175         /* if reservation is invalid then this will fail */
3176         err = ieee80211_check_combinations(sdata, NULL, chanctx->mode, 0);
3177         if (err) {
3178                 ieee80211_vif_unreserve_chanctx(sdata);
3179                 goto out;
3180         }
3181
3182         err = ieee80211_set_csa_beacon(sdata, params, &changed);
3183         if (err) {
3184                 ieee80211_vif_unreserve_chanctx(sdata);
3185                 goto out;
3186         }
3187
3188         sdata->csa_chandef = params->chandef;
3189         sdata->csa_block_tx = params->block_tx;
3190         sdata->vif.csa_active = true;
3191
3192         if (sdata->csa_block_tx)
3193                 ieee80211_stop_vif_queues(local, sdata,
3194                                           IEEE80211_QUEUE_STOP_REASON_CSA);
3195
3196         cfg80211_ch_switch_started_notify(sdata->dev, &sdata->csa_chandef,
3197                                           params->count);
3198
3199         if (changed) {
3200                 ieee80211_bss_info_change_notify(sdata, changed);
3201                 drv_channel_switch_beacon(sdata, &params->chandef);
3202         } else {
3203                 /* if the beacon didn't change, we can finalize immediately */
3204                 ieee80211_csa_finalize(sdata);
3205         }
3206
3207 out:
3208         mutex_unlock(&local->chanctx_mtx);
3209         return err;
3210 }
3211
3212 int ieee80211_channel_switch(struct wiphy *wiphy, struct net_device *dev,
3213                              struct cfg80211_csa_settings *params)
3214 {
3215         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3216         struct ieee80211_local *local = sdata->local;
3217         int err;
3218
3219         mutex_lock(&local->mtx);
3220         err = __ieee80211_channel_switch(wiphy, dev, params);
3221         mutex_unlock(&local->mtx);
3222
3223         return err;
3224 }
3225
3226 static struct sk_buff *ieee80211_make_ack_skb(struct ieee80211_local *local,
3227                                               struct sk_buff *skb, u64 *cookie,
3228                                               gfp_t gfp)
3229 {
3230         unsigned long spin_flags;
3231         struct sk_buff *ack_skb;
3232         int id;
3233
3234         ack_skb = skb_copy(skb, gfp);
3235         if (!ack_skb)
3236                 return ERR_PTR(-ENOMEM);
3237
3238         spin_lock_irqsave(&local->ack_status_lock, spin_flags);
3239         id = idr_alloc(&local->ack_status_frames, ack_skb,
3240                        1, 0x10000, GFP_ATOMIC);
3241         spin_unlock_irqrestore(&local->ack_status_lock, spin_flags);
3242
3243         if (id < 0) {
3244                 kfree_skb(ack_skb);
3245                 return ERR_PTR(-ENOMEM);
3246         }
3247
3248         IEEE80211_SKB_CB(skb)->ack_frame_id = id;
3249
3250         *cookie = ieee80211_mgmt_tx_cookie(local);
3251         IEEE80211_SKB_CB(ack_skb)->ack.cookie = *cookie;
3252
3253         return ack_skb;
3254 }
3255
3256 static int ieee80211_mgmt_tx(struct wiphy *wiphy, struct wireless_dev *wdev,
3257                              struct cfg80211_mgmt_tx_params *params,
3258                              u64 *cookie)
3259 {
3260         struct ieee80211_sub_if_data *sdata = IEEE80211_WDEV_TO_SUB_IF(wdev);
3261         struct ieee80211_local *local = sdata->local;
3262         struct sk_buff *skb, *ack_skb;
3263         struct sta_info *sta;
3264         const struct ieee80211_mgmt *mgmt = (void *)params->buf;
3265         bool need_offchan = false;
3266         u32 flags;
3267         int ret;
3268         u8 *data;
3269
3270         if (params->dont_wait_for_ack)
3271                 flags = IEEE80211_TX_CTL_NO_ACK;
3272         else
3273                 flags = IEEE80211_TX_INTFL_NL80211_FRAME_TX |
3274                         IEEE80211_TX_CTL_REQ_TX_STATUS;
3275
3276         if (params->no_cck)
3277                 flags |= IEEE80211_TX_CTL_NO_CCK_RATE;
3278
3279         switch (sdata->vif.type) {
3280         case NL80211_IFTYPE_ADHOC:
3281                 if (!sdata->vif.bss_conf.ibss_joined)
3282                         need_offchan = true;
3283                 /* fall through */
3284 #ifdef CONFIG_MAC80211_MESH
3285         case NL80211_IFTYPE_MESH_POINT:
3286                 if (ieee80211_vif_is_mesh(&sdata->vif) &&
3287                     !sdata->u.mesh.mesh_id_len)
3288                         need_offchan = true;
3289                 /* fall through */
3290 #endif
3291         case NL80211_IFTYPE_AP:
3292         case NL80211_IFTYPE_AP_VLAN:
3293         case NL80211_IFTYPE_P2P_GO:
3294                 if (sdata->vif.type != NL80211_IFTYPE_ADHOC &&
3295                     !ieee80211_vif_is_mesh(&sdata->vif) &&
3296                     !rcu_access_pointer(sdata->bss->beacon))
3297                         need_offchan = true;
3298                 if (!ieee80211_is_action(mgmt->frame_control) ||
3299                     mgmt->u.action.category == WLAN_CATEGORY_PUBLIC ||
3300                     mgmt->u.action.category == WLAN_CATEGORY_SELF_PROTECTED ||
3301                     mgmt->u.action.category == WLAN_CATEGORY_SPECTRUM_MGMT)
3302                         break;
3303                 rcu_read_lock();
3304                 sta = sta_info_get(sdata, mgmt->da);
3305                 rcu_read_unlock();
3306                 if (!sta)
3307                         return -ENOLINK;
3308                 break;
3309         case NL80211_IFTYPE_STATION:
3310         case NL80211_IFTYPE_P2P_CLIENT:
3311                 sdata_lock(sdata);
3312                 if (!sdata->u.mgd.associated ||
3313                     (params->offchan && params->wait &&
3314                      local->ops->remain_on_channel &&
3315                      memcmp(sdata->u.mgd.associated->bssid,
3316                             mgmt->bssid, ETH_ALEN)))
3317                         need_offchan = true;
3318                 sdata_unlock(sdata);
3319                 break;
3320         case NL80211_IFTYPE_P2P_DEVICE:
3321                 need_offchan = true;
3322                 break;
3323         default:
3324                 return -EOPNOTSUPP;
3325         }
3326
3327         /* configurations requiring offchan cannot work if no channel has been
3328          * specified
3329          */
3330         if (need_offchan && !params->chan)
3331                 return -EINVAL;
3332
3333         mutex_lock(&local->mtx);
3334
3335         /* Check if the operating channel is the requested channel */
3336         if (!need_offchan) {
3337                 struct ieee80211_chanctx_conf *chanctx_conf;
3338
3339                 rcu_read_lock();
3340                 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
3341
3342                 if (chanctx_conf) {
3343                         need_offchan = params->chan &&
3344                                        (params->chan !=
3345                                         chanctx_conf->def.chan);
3346                 } else if (!params->chan) {
3347                         ret = -EINVAL;
3348                         rcu_read_unlock();
3349                         goto out_unlock;
3350                 } else {
3351                         need_offchan = true;
3352                 }
3353                 rcu_read_unlock();
3354         }
3355
3356         if (need_offchan && !params->offchan) {
3357                 ret = -EBUSY;
3358                 goto out_unlock;
3359         }
3360
3361         skb = dev_alloc_skb(local->hw.extra_tx_headroom + params->len);
3362         if (!skb) {
3363                 ret = -ENOMEM;
3364                 goto out_unlock;
3365         }
3366         skb_reserve(skb, local->hw.extra_tx_headroom);
3367
3368         data = skb_put(skb, params->len);
3369         memcpy(data, params->buf, params->len);
3370
3371         /* Update CSA counters */
3372         if (sdata->vif.csa_active &&
3373             (sdata->vif.type == NL80211_IFTYPE_AP ||
3374              sdata->vif.type == NL80211_IFTYPE_MESH_POINT ||
3375              sdata->vif.type == NL80211_IFTYPE_ADHOC) &&
3376             params->n_csa_offsets) {
3377                 int i;
3378                 struct beacon_data *beacon = NULL;
3379
3380                 rcu_read_lock();
3381
3382                 if (sdata->vif.type == NL80211_IFTYPE_AP)
3383                         beacon = rcu_dereference(sdata->u.ap.beacon);
3384                 else if (sdata->vif.type == NL80211_IFTYPE_ADHOC)
3385                         beacon = rcu_dereference(sdata->u.ibss.presp);
3386                 else if (ieee80211_vif_is_mesh(&sdata->vif))
3387                         beacon = rcu_dereference(sdata->u.mesh.beacon);
3388
3389                 if (beacon)
3390                         for (i = 0; i < params->n_csa_offsets; i++)
3391                                 data[params->csa_offsets[i]] =
3392                                         beacon->csa_current_counter;
3393
3394                 rcu_read_unlock();
3395         }
3396
3397         IEEE80211_SKB_CB(skb)->flags = flags;
3398
3399         skb->dev = sdata->dev;
3400
3401         if (!params->dont_wait_for_ack) {
3402                 /* make a copy to preserve the frame contents
3403                  * in case of encryption.
3404                  */
3405                 ack_skb = ieee80211_make_ack_skb(local, skb, cookie,
3406                                                  GFP_KERNEL);
3407                 if (IS_ERR(ack_skb)) {
3408                         ret = PTR_ERR(ack_skb);
3409                         kfree_skb(skb);
3410                         goto out_unlock;
3411                 }
3412         } else {
3413                 /* Assign a dummy non-zero cookie, it's not sent to
3414                  * userspace in this case but we rely on its value
3415                  * internally in the need_offchan case to distinguish
3416                  * mgmt-tx from remain-on-channel.
3417                  */
3418                 *cookie = 0xffffffff;
3419         }
3420
3421         if (!need_offchan) {
3422                 ieee80211_tx_skb(sdata, skb);
3423                 ret = 0;
3424                 goto out_unlock;
3425         }
3426
3427         IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_TX_OFFCHAN |
3428                                         IEEE80211_TX_INTFL_OFFCHAN_TX_OK;
3429         if (ieee80211_hw_check(&local->hw, QUEUE_CONTROL))
3430                 IEEE80211_SKB_CB(skb)->hw_queue =
3431                         local->hw.offchannel_tx_hw_queue;
3432
3433         /* This will handle all kinds of coalescing and immediate TX */
3434         ret = ieee80211_start_roc_work(local, sdata, params->chan,
3435                                        params->wait, cookie, skb,
3436                                        IEEE80211_ROC_TYPE_MGMT_TX);
3437         if (ret)
3438                 kfree_skb(skb);
3439  out_unlock:
3440         mutex_unlock(&local->mtx);
3441         return ret;
3442 }
3443
3444 static int ieee80211_mgmt_tx_cancel_wait(struct wiphy *wiphy,
3445                                          struct wireless_dev *wdev,
3446                                          u64 cookie)
3447 {
3448         struct ieee80211_local *local = wiphy_priv(wiphy);
3449
3450         return ieee80211_cancel_roc(local, cookie, true);
3451 }
3452
3453 static void ieee80211_mgmt_frame_register(struct wiphy *wiphy,
3454                                           struct wireless_dev *wdev,
3455                                           u16 frame_type, bool reg)
3456 {
3457         struct ieee80211_local *local = wiphy_priv(wiphy);
3458         struct ieee80211_sub_if_data *sdata = IEEE80211_WDEV_TO_SUB_IF(wdev);
3459
3460         switch (frame_type) {
3461         case IEEE80211_FTYPE_MGMT | IEEE80211_STYPE_PROBE_REQ:
3462                 if (reg) {
3463                         local->probe_req_reg++;
3464                         sdata->vif.probe_req_reg++;
3465                 } else {
3466                         if (local->probe_req_reg)
3467                                 local->probe_req_reg--;
3468
3469                         if (sdata->vif.probe_req_reg)
3470                                 sdata->vif.probe_req_reg--;
3471                 }
3472
3473                 if (!local->open_count)
3474                         break;
3475
3476                 if (sdata->vif.probe_req_reg == 1)
3477                         drv_config_iface_filter(local, sdata, FIF_PROBE_REQ,
3478                                                 FIF_PROBE_REQ);
3479                 else if (sdata->vif.probe_req_reg == 0)
3480                         drv_config_iface_filter(local, sdata, 0,
3481                                                 FIF_PROBE_REQ);
3482
3483                 ieee80211_configure_filter(local);
3484                 break;
3485         default:
3486                 break;
3487         }
3488 }
3489
3490 static int ieee80211_set_antenna(struct wiphy *wiphy, u32 tx_ant, u32 rx_ant)
3491 {
3492         struct ieee80211_local *local = wiphy_priv(wiphy);
3493
3494         if (local->started)
3495                 return -EOPNOTSUPP;
3496
3497         return drv_set_antenna(local, tx_ant, rx_ant);
3498 }
3499
3500 static int ieee80211_get_antenna(struct wiphy *wiphy, u32 *tx_ant, u32 *rx_ant)
3501 {
3502         struct ieee80211_local *local = wiphy_priv(wiphy);
3503
3504         return drv_get_antenna(local, tx_ant, rx_ant);
3505 }
3506
3507 static int ieee80211_set_rekey_data(struct wiphy *wiphy,
3508                                     struct net_device *dev,
3509                                     struct cfg80211_gtk_rekey_data *data)
3510 {
3511         struct ieee80211_local *local = wiphy_priv(wiphy);
3512         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3513
3514         if (!local->ops->set_rekey_data)
3515                 return -EOPNOTSUPP;
3516
3517         drv_set_rekey_data(local, sdata, data);
3518
3519         return 0;
3520 }
3521
3522 static int ieee80211_probe_client(struct wiphy *wiphy, struct net_device *dev,
3523                                   const u8 *peer, u64 *cookie)
3524 {
3525         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3526         struct ieee80211_local *local = sdata->local;
3527         struct ieee80211_qos_hdr *nullfunc;
3528         struct sk_buff *skb, *ack_skb;
3529         int size = sizeof(*nullfunc);
3530         __le16 fc;
3531         bool qos;
3532         struct ieee80211_tx_info *info;
3533         struct sta_info *sta;
3534         struct ieee80211_chanctx_conf *chanctx_conf;
3535         enum ieee80211_band band;
3536         int ret;
3537
3538         /* the lock is needed to assign the cookie later */
3539         mutex_lock(&local->mtx);
3540
3541         rcu_read_lock();
3542         chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
3543         if (WARN_ON(!chanctx_conf)) {
3544                 ret = -EINVAL;
3545                 goto unlock;
3546         }
3547         band = chanctx_conf->def.chan->band;
3548         sta = sta_info_get_bss(sdata, peer);
3549         if (sta) {
3550                 qos = sta->sta.wme;
3551         } else {
3552                 ret = -ENOLINK;
3553                 goto unlock;
3554         }
3555
3556         if (qos) {
3557                 fc = cpu_to_le16(IEEE80211_FTYPE_DATA |
3558                                  IEEE80211_STYPE_QOS_NULLFUNC |
3559                                  IEEE80211_FCTL_FROMDS);
3560         } else {
3561                 size -= 2;
3562                 fc = cpu_to_le16(IEEE80211_FTYPE_DATA |
3563                                  IEEE80211_STYPE_NULLFUNC |
3564                                  IEEE80211_FCTL_FROMDS);
3565         }
3566
3567         skb = dev_alloc_skb(local->hw.extra_tx_headroom + size);
3568         if (!skb) {
3569                 ret = -ENOMEM;
3570                 goto unlock;
3571         }
3572
3573         skb->dev = dev;
3574
3575         skb_reserve(skb, local->hw.extra_tx_headroom);
3576
3577         nullfunc = (void *) skb_put(skb, size);
3578         nullfunc->frame_control = fc;
3579         nullfunc->duration_id = 0;
3580         memcpy(nullfunc->addr1, sta->sta.addr, ETH_ALEN);
3581         memcpy(nullfunc->addr2, sdata->vif.addr, ETH_ALEN);
3582         memcpy(nullfunc->addr3, sdata->vif.addr, ETH_ALEN);
3583         nullfunc->seq_ctrl = 0;
3584
3585         info = IEEE80211_SKB_CB(skb);
3586
3587         info->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS |
3588                        IEEE80211_TX_INTFL_NL80211_FRAME_TX;
3589         info->band = band;
3590
3591         skb_set_queue_mapping(skb, IEEE80211_AC_VO);
3592         skb->priority = 7;
3593         if (qos)
3594                 nullfunc->qos_ctrl = cpu_to_le16(7);
3595
3596         ack_skb = ieee80211_make_ack_skb(local, skb, cookie, GFP_ATOMIC);
3597         if (IS_ERR(ack_skb)) {
3598                 kfree_skb(skb);
3599                 ret = PTR_ERR(ack_skb);
3600                 goto unlock;
3601         }
3602
3603         local_bh_disable();
3604         ieee80211_xmit(sdata, sta, skb);
3605         local_bh_enable();
3606
3607         ret = 0;
3608 unlock:
3609         rcu_read_unlock();
3610         mutex_unlock(&local->mtx);
3611
3612         return ret;
3613 }
3614
3615 static int ieee80211_cfg_get_channel(struct wiphy *wiphy,
3616                                      struct wireless_dev *wdev,
3617                                      struct cfg80211_chan_def *chandef)
3618 {
3619         struct ieee80211_sub_if_data *sdata = IEEE80211_WDEV_TO_SUB_IF(wdev);
3620         struct ieee80211_local *local = wiphy_priv(wiphy);
3621         struct ieee80211_chanctx_conf *chanctx_conf;
3622         int ret = -ENODATA;
3623
3624         rcu_read_lock();
3625         chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
3626         if (chanctx_conf) {
3627                 *chandef = sdata->vif.bss_conf.chandef;
3628                 ret = 0;
3629         } else if (local->open_count > 0 &&
3630                    local->open_count == local->monitors &&
3631                    sdata->vif.type == NL80211_IFTYPE_MONITOR) {
3632                 if (local->use_chanctx)
3633                         *chandef = local->monitor_chandef;
3634                 else
3635                         *chandef = local->_oper_chandef;
3636                 ret = 0;
3637         }
3638         rcu_read_unlock();
3639
3640         return ret;
3641 }
3642
3643 #ifdef CONFIG_PM
3644 static void ieee80211_set_wakeup(struct wiphy *wiphy, bool enabled)
3645 {
3646         drv_set_wakeup(wiphy_priv(wiphy), enabled);
3647 }
3648 #endif
3649
3650 static int ieee80211_set_qos_map(struct wiphy *wiphy,
3651                                  struct net_device *dev,
3652                                  struct cfg80211_qos_map *qos_map)
3653 {
3654         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3655         struct mac80211_qos_map *new_qos_map, *old_qos_map;
3656
3657         if (qos_map) {
3658                 new_qos_map = kzalloc(sizeof(*new_qos_map), GFP_KERNEL);
3659                 if (!new_qos_map)
3660                         return -ENOMEM;
3661                 memcpy(&new_qos_map->qos_map, qos_map, sizeof(*qos_map));
3662         } else {
3663                 /* A NULL qos_map was passed to disable QoS mapping */
3664                 new_qos_map = NULL;
3665         }
3666
3667         old_qos_map = sdata_dereference(sdata->qos_map, sdata);
3668         rcu_assign_pointer(sdata->qos_map, new_qos_map);
3669         if (old_qos_map)
3670                 kfree_rcu(old_qos_map, rcu_head);
3671
3672         return 0;
3673 }
3674
3675 static int ieee80211_set_ap_chanwidth(struct wiphy *wiphy,
3676                                       struct net_device *dev,
3677                                       struct cfg80211_chan_def *chandef)
3678 {
3679         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3680         int ret;
3681         u32 changed = 0;
3682
3683         ret = ieee80211_vif_change_bandwidth(sdata, chandef, &changed);
3684         if (ret == 0)
3685                 ieee80211_bss_info_change_notify(sdata, changed);
3686
3687         return ret;
3688 }
3689
3690 static int ieee80211_add_tx_ts(struct wiphy *wiphy, struct net_device *dev,
3691                                u8 tsid, const u8 *peer, u8 up,
3692                                u16 admitted_time)
3693 {
3694         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3695         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3696         int ac = ieee802_1d_to_ac[up];
3697
3698         if (sdata->vif.type != NL80211_IFTYPE_STATION)
3699                 return -EOPNOTSUPP;
3700
3701         if (!(sdata->wmm_acm & BIT(up)))
3702                 return -EINVAL;
3703
3704         if (ifmgd->tx_tspec[ac].admitted_time)
3705                 return -EBUSY;
3706
3707         if (admitted_time) {
3708                 ifmgd->tx_tspec[ac].admitted_time = 32 * admitted_time;
3709                 ifmgd->tx_tspec[ac].tsid = tsid;
3710                 ifmgd->tx_tspec[ac].up = up;
3711         }
3712
3713         return 0;
3714 }
3715
3716 static int ieee80211_del_tx_ts(struct wiphy *wiphy, struct net_device *dev,
3717                                u8 tsid, const u8 *peer)
3718 {
3719         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3720         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3721         struct ieee80211_local *local = wiphy_priv(wiphy);
3722         int ac;
3723
3724         for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
3725                 struct ieee80211_sta_tx_tspec *tx_tspec = &ifmgd->tx_tspec[ac];
3726
3727                 /* skip unused entries */
3728                 if (!tx_tspec->admitted_time)
3729                         continue;
3730
3731                 if (tx_tspec->tsid != tsid)
3732                         continue;
3733
3734                 /* due to this new packets will be reassigned to non-ACM ACs */
3735                 tx_tspec->up = -1;
3736
3737                 /* Make sure that all packets have been sent to avoid to
3738                  * restore the QoS params on packets that are still on the
3739                  * queues.
3740                  */
3741                 synchronize_net();
3742                 ieee80211_flush_queues(local, sdata, false);
3743
3744                 /* restore the normal QoS parameters
3745                  * (unconditionally to avoid races)
3746                  */
3747                 tx_tspec->action = TX_TSPEC_ACTION_STOP_DOWNGRADE;
3748                 tx_tspec->downgraded = false;
3749                 ieee80211_sta_handle_tspec_ac_params(sdata);
3750
3751                 /* finally clear all the data */
3752                 memset(tx_tspec, 0, sizeof(*tx_tspec));
3753
3754                 return 0;
3755         }
3756
3757         return -ENOENT;
3758 }
3759
3760 const struct cfg80211_ops mac80211_config_ops = {
3761         .add_virtual_intf = ieee80211_add_iface,
3762         .del_virtual_intf = ieee80211_del_iface,
3763         .change_virtual_intf = ieee80211_change_iface,
3764         .start_p2p_device = ieee80211_start_p2p_device,
3765         .stop_p2p_device = ieee80211_stop_p2p_device,
3766         .add_key = ieee80211_add_key,
3767         .del_key = ieee80211_del_key,
3768         .get_key = ieee80211_get_key,
3769         .set_default_key = ieee80211_config_default_key,
3770         .set_default_mgmt_key = ieee80211_config_default_mgmt_key,
3771         .start_ap = ieee80211_start_ap,
3772         .change_beacon = ieee80211_change_beacon,
3773         .stop_ap = ieee80211_stop_ap,
3774         .add_station = ieee80211_add_station,
3775         .del_station = ieee80211_del_station,
3776         .change_station = ieee80211_change_station,
3777         .get_station = ieee80211_get_station,
3778         .dump_station = ieee80211_dump_station,
3779         .dump_survey = ieee80211_dump_survey,
3780 #ifdef CONFIG_MAC80211_MESH
3781         .add_mpath = ieee80211_add_mpath,
3782         .del_mpath = ieee80211_del_mpath,
3783         .change_mpath = ieee80211_change_mpath,
3784         .get_mpath = ieee80211_get_mpath,
3785         .dump_mpath = ieee80211_dump_mpath,
3786         .get_mpp = ieee80211_get_mpp,
3787         .dump_mpp = ieee80211_dump_mpp,
3788         .update_mesh_config = ieee80211_update_mesh_config,
3789         .get_mesh_config = ieee80211_get_mesh_config,
3790         .join_mesh = ieee80211_join_mesh,
3791         .leave_mesh = ieee80211_leave_mesh,
3792 #endif
3793         .join_ocb = ieee80211_join_ocb,
3794         .leave_ocb = ieee80211_leave_ocb,
3795         .change_bss = ieee80211_change_bss,
3796         .set_txq_params = ieee80211_set_txq_params,
3797         .set_monitor_channel = ieee80211_set_monitor_channel,
3798         .suspend = ieee80211_suspend,
3799         .resume = ieee80211_resume,
3800         .scan = ieee80211_scan,
3801         .sched_scan_start = ieee80211_sched_scan_start,
3802         .sched_scan_stop = ieee80211_sched_scan_stop,
3803         .auth = ieee80211_auth,
3804         .assoc = ieee80211_assoc,
3805         .deauth = ieee80211_deauth,
3806         .disassoc = ieee80211_disassoc,
3807         .join_ibss = ieee80211_join_ibss,
3808         .leave_ibss = ieee80211_leave_ibss,
3809         .set_mcast_rate = ieee80211_set_mcast_rate,
3810         .set_wiphy_params = ieee80211_set_wiphy_params,
3811         .set_tx_power = ieee80211_set_tx_power,
3812         .get_tx_power = ieee80211_get_tx_power,
3813         .set_wds_peer = ieee80211_set_wds_peer,
3814         .rfkill_poll = ieee80211_rfkill_poll,
3815         CFG80211_TESTMODE_CMD(ieee80211_testmode_cmd)
3816         CFG80211_TESTMODE_DUMP(ieee80211_testmode_dump)
3817         .set_power_mgmt = ieee80211_set_power_mgmt,
3818         .set_bitrate_mask = ieee80211_set_bitrate_mask,
3819         .remain_on_channel = ieee80211_remain_on_channel,
3820         .cancel_remain_on_channel = ieee80211_cancel_remain_on_channel,
3821         .mgmt_tx = ieee80211_mgmt_tx,
3822         .mgmt_tx_cancel_wait = ieee80211_mgmt_tx_cancel_wait,
3823         .set_cqm_rssi_config = ieee80211_set_cqm_rssi_config,
3824         .mgmt_frame_register = ieee80211_mgmt_frame_register,
3825         .set_antenna = ieee80211_set_antenna,
3826         .get_antenna = ieee80211_get_antenna,
3827         .set_rekey_data = ieee80211_set_rekey_data,
3828         .tdls_oper = ieee80211_tdls_oper,
3829         .tdls_mgmt = ieee80211_tdls_mgmt,
3830         .tdls_channel_switch = ieee80211_tdls_channel_switch,
3831         .tdls_cancel_channel_switch = ieee80211_tdls_cancel_channel_switch,
3832         .probe_client = ieee80211_probe_client,
3833         .set_noack_map = ieee80211_set_noack_map,
3834 #ifdef CONFIG_PM
3835         .set_wakeup = ieee80211_set_wakeup,
3836 #endif
3837         .get_channel = ieee80211_cfg_get_channel,
3838         .start_radar_detection = ieee80211_start_radar_detection,
3839         .channel_switch = ieee80211_channel_switch,
3840         .set_qos_map = ieee80211_set_qos_map,
3841         .set_ap_chanwidth = ieee80211_set_ap_chanwidth,
3842         .add_tx_ts = ieee80211_add_tx_ts,
3843         .del_tx_ts = ieee80211_del_tx_ts,
3844 };