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         mutex_unlock(&sdata->local->mtx);
1770
1771         return 0;
1772 }
1773 #endif
1774
1775 static int ieee80211_change_bss(struct wiphy *wiphy,
1776                                 struct net_device *dev,
1777                                 struct bss_parameters *params)
1778 {
1779         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1780         enum ieee80211_band band;
1781         u32 changed = 0;
1782
1783         if (!sdata_dereference(sdata->u.ap.beacon, sdata))
1784                 return -ENOENT;
1785
1786         band = ieee80211_get_sdata_band(sdata);
1787
1788         if (params->use_cts_prot >= 0) {
1789                 sdata->vif.bss_conf.use_cts_prot = params->use_cts_prot;
1790                 changed |= BSS_CHANGED_ERP_CTS_PROT;
1791         }
1792         if (params->use_short_preamble >= 0) {
1793                 sdata->vif.bss_conf.use_short_preamble =
1794                         params->use_short_preamble;
1795                 changed |= BSS_CHANGED_ERP_PREAMBLE;
1796         }
1797
1798         if (!sdata->vif.bss_conf.use_short_slot &&
1799             band == IEEE80211_BAND_5GHZ) {
1800                 sdata->vif.bss_conf.use_short_slot = true;
1801                 changed |= BSS_CHANGED_ERP_SLOT;
1802         }
1803
1804         if (params->use_short_slot_time >= 0) {
1805                 sdata->vif.bss_conf.use_short_slot =
1806                         params->use_short_slot_time;
1807                 changed |= BSS_CHANGED_ERP_SLOT;
1808         }
1809
1810         if (params->basic_rates) {
1811                 ieee80211_parse_bitrates(&sdata->vif.bss_conf.chandef,
1812                                          wiphy->bands[band],
1813                                          params->basic_rates,
1814                                          params->basic_rates_len,
1815                                          &sdata->vif.bss_conf.basic_rates);
1816                 changed |= BSS_CHANGED_BASIC_RATES;
1817         }
1818
1819         if (params->ap_isolate >= 0) {
1820                 if (params->ap_isolate)
1821                         sdata->flags |= IEEE80211_SDATA_DONT_BRIDGE_PACKETS;
1822                 else
1823                         sdata->flags &= ~IEEE80211_SDATA_DONT_BRIDGE_PACKETS;
1824         }
1825
1826         if (params->ht_opmode >= 0) {
1827                 sdata->vif.bss_conf.ht_operation_mode =
1828                         (u16) params->ht_opmode;
1829                 changed |= BSS_CHANGED_HT;
1830         }
1831
1832         if (params->p2p_ctwindow >= 0) {
1833                 sdata->vif.bss_conf.p2p_noa_attr.oppps_ctwindow &=
1834                                         ~IEEE80211_P2P_OPPPS_CTWINDOW_MASK;
1835                 sdata->vif.bss_conf.p2p_noa_attr.oppps_ctwindow |=
1836                         params->p2p_ctwindow & IEEE80211_P2P_OPPPS_CTWINDOW_MASK;
1837                 changed |= BSS_CHANGED_P2P_PS;
1838         }
1839
1840         if (params->p2p_opp_ps > 0) {
1841                 sdata->vif.bss_conf.p2p_noa_attr.oppps_ctwindow |=
1842                                         IEEE80211_P2P_OPPPS_ENABLE_BIT;
1843                 changed |= BSS_CHANGED_P2P_PS;
1844         } else if (params->p2p_opp_ps == 0) {
1845                 sdata->vif.bss_conf.p2p_noa_attr.oppps_ctwindow &=
1846                                         ~IEEE80211_P2P_OPPPS_ENABLE_BIT;
1847                 changed |= BSS_CHANGED_P2P_PS;
1848         }
1849
1850         ieee80211_bss_info_change_notify(sdata, changed);
1851
1852         return 0;
1853 }
1854
1855 static int ieee80211_set_txq_params(struct wiphy *wiphy,
1856                                     struct net_device *dev,
1857                                     struct ieee80211_txq_params *params)
1858 {
1859         struct ieee80211_local *local = wiphy_priv(wiphy);
1860         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1861         struct ieee80211_tx_queue_params p;
1862
1863         if (!local->ops->conf_tx)
1864                 return -EOPNOTSUPP;
1865
1866         if (local->hw.queues < IEEE80211_NUM_ACS)
1867                 return -EOPNOTSUPP;
1868
1869         memset(&p, 0, sizeof(p));
1870         p.aifs = params->aifs;
1871         p.cw_max = params->cwmax;
1872         p.cw_min = params->cwmin;
1873         p.txop = params->txop;
1874
1875         /*
1876          * Setting tx queue params disables u-apsd because it's only
1877          * called in master mode.
1878          */
1879         p.uapsd = false;
1880
1881         sdata->tx_conf[params->ac] = p;
1882         if (drv_conf_tx(local, sdata, params->ac, &p)) {
1883                 wiphy_debug(local->hw.wiphy,
1884                             "failed to set TX queue parameters for AC %d\n",
1885                             params->ac);
1886                 return -EINVAL;
1887         }
1888
1889         ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_QOS);
1890
1891         return 0;
1892 }
1893
1894 #ifdef CONFIG_PM
1895 static int ieee80211_suspend(struct wiphy *wiphy,
1896                              struct cfg80211_wowlan *wowlan)
1897 {
1898         return __ieee80211_suspend(wiphy_priv(wiphy), wowlan);
1899 }
1900
1901 static int ieee80211_resume(struct wiphy *wiphy)
1902 {
1903         return __ieee80211_resume(wiphy_priv(wiphy));
1904 }
1905 #else
1906 #define ieee80211_suspend NULL
1907 #define ieee80211_resume NULL
1908 #endif
1909
1910 static int ieee80211_scan(struct wiphy *wiphy,
1911                           struct cfg80211_scan_request *req)
1912 {
1913         struct ieee80211_sub_if_data *sdata;
1914
1915         sdata = IEEE80211_WDEV_TO_SUB_IF(req->wdev);
1916
1917         switch (ieee80211_vif_type_p2p(&sdata->vif)) {
1918         case NL80211_IFTYPE_STATION:
1919         case NL80211_IFTYPE_ADHOC:
1920         case NL80211_IFTYPE_MESH_POINT:
1921         case NL80211_IFTYPE_P2P_CLIENT:
1922         case NL80211_IFTYPE_P2P_DEVICE:
1923                 break;
1924         case NL80211_IFTYPE_P2P_GO:
1925                 if (sdata->local->ops->hw_scan)
1926                         break;
1927                 /*
1928                  * FIXME: implement NoA while scanning in software,
1929                  * for now fall through to allow scanning only when
1930                  * beaconing hasn't been configured yet
1931                  */
1932         case NL80211_IFTYPE_AP:
1933                 /*
1934                  * If the scan has been forced (and the driver supports
1935                  * forcing), don't care about being beaconing already.
1936                  * This will create problems to the attached stations (e.g. all
1937                  * the  frames sent while scanning on other channel will be
1938                  * lost)
1939                  */
1940                 if (sdata->u.ap.beacon &&
1941                     (!(wiphy->features & NL80211_FEATURE_AP_SCAN) ||
1942                      !(req->flags & NL80211_SCAN_FLAG_AP)))
1943                         return -EOPNOTSUPP;
1944                 break;
1945         default:
1946                 return -EOPNOTSUPP;
1947         }
1948
1949         return ieee80211_request_scan(sdata, req);
1950 }
1951
1952 static int
1953 ieee80211_sched_scan_start(struct wiphy *wiphy,
1954                            struct net_device *dev,
1955                            struct cfg80211_sched_scan_request *req)
1956 {
1957         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1958
1959         if (!sdata->local->ops->sched_scan_start)
1960                 return -EOPNOTSUPP;
1961
1962         return ieee80211_request_sched_scan_start(sdata, req);
1963 }
1964
1965 static int
1966 ieee80211_sched_scan_stop(struct wiphy *wiphy, struct net_device *dev)
1967 {
1968         struct ieee80211_local *local = wiphy_priv(wiphy);
1969
1970         if (!local->ops->sched_scan_stop)
1971                 return -EOPNOTSUPP;
1972
1973         return ieee80211_request_sched_scan_stop(local);
1974 }
1975
1976 static int ieee80211_auth(struct wiphy *wiphy, struct net_device *dev,
1977                           struct cfg80211_auth_request *req)
1978 {
1979         return ieee80211_mgd_auth(IEEE80211_DEV_TO_SUB_IF(dev), req);
1980 }
1981
1982 static int ieee80211_assoc(struct wiphy *wiphy, struct net_device *dev,
1983                            struct cfg80211_assoc_request *req)
1984 {
1985         return ieee80211_mgd_assoc(IEEE80211_DEV_TO_SUB_IF(dev), req);
1986 }
1987
1988 static int ieee80211_deauth(struct wiphy *wiphy, struct net_device *dev,
1989                             struct cfg80211_deauth_request *req)
1990 {
1991         return ieee80211_mgd_deauth(IEEE80211_DEV_TO_SUB_IF(dev), req);
1992 }
1993
1994 static int ieee80211_disassoc(struct wiphy *wiphy, struct net_device *dev,
1995                               struct cfg80211_disassoc_request *req)
1996 {
1997         return ieee80211_mgd_disassoc(IEEE80211_DEV_TO_SUB_IF(dev), req);
1998 }
1999
2000 static int ieee80211_join_ibss(struct wiphy *wiphy, struct net_device *dev,
2001                                struct cfg80211_ibss_params *params)
2002 {
2003         return ieee80211_ibss_join(IEEE80211_DEV_TO_SUB_IF(dev), params);
2004 }
2005
2006 static int ieee80211_leave_ibss(struct wiphy *wiphy, struct net_device *dev)
2007 {
2008         return ieee80211_ibss_leave(IEEE80211_DEV_TO_SUB_IF(dev));
2009 }
2010
2011 static int ieee80211_join_ocb(struct wiphy *wiphy, struct net_device *dev,
2012                               struct ocb_setup *setup)
2013 {
2014         return ieee80211_ocb_join(IEEE80211_DEV_TO_SUB_IF(dev), setup);
2015 }
2016
2017 static int ieee80211_leave_ocb(struct wiphy *wiphy, struct net_device *dev)
2018 {
2019         return ieee80211_ocb_leave(IEEE80211_DEV_TO_SUB_IF(dev));
2020 }
2021
2022 static int ieee80211_set_mcast_rate(struct wiphy *wiphy, struct net_device *dev,
2023                                     int rate[IEEE80211_NUM_BANDS])
2024 {
2025         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2026
2027         memcpy(sdata->vif.bss_conf.mcast_rate, rate,
2028                sizeof(int) * IEEE80211_NUM_BANDS);
2029
2030         return 0;
2031 }
2032
2033 static int ieee80211_set_wiphy_params(struct wiphy *wiphy, u32 changed)
2034 {
2035         struct ieee80211_local *local = wiphy_priv(wiphy);
2036         int err;
2037
2038         if (changed & WIPHY_PARAM_FRAG_THRESHOLD) {
2039                 ieee80211_check_fast_xmit_all(local);
2040
2041                 err = drv_set_frag_threshold(local, wiphy->frag_threshold);
2042
2043                 if (err) {
2044                         ieee80211_check_fast_xmit_all(local);
2045                         return err;
2046                 }
2047         }
2048
2049         if ((changed & WIPHY_PARAM_COVERAGE_CLASS) ||
2050             (changed & WIPHY_PARAM_DYN_ACK)) {
2051                 s16 coverage_class;
2052
2053                 coverage_class = changed & WIPHY_PARAM_COVERAGE_CLASS ?
2054                                         wiphy->coverage_class : -1;
2055                 err = drv_set_coverage_class(local, coverage_class);
2056
2057                 if (err)
2058                         return err;
2059         }
2060
2061         if (changed & WIPHY_PARAM_RTS_THRESHOLD) {
2062                 err = drv_set_rts_threshold(local, wiphy->rts_threshold);
2063
2064                 if (err)
2065                         return err;
2066         }
2067
2068         if (changed & WIPHY_PARAM_RETRY_SHORT) {
2069                 if (wiphy->retry_short > IEEE80211_MAX_TX_RETRY)
2070                         return -EINVAL;
2071                 local->hw.conf.short_frame_max_tx_count = wiphy->retry_short;
2072         }
2073         if (changed & WIPHY_PARAM_RETRY_LONG) {
2074                 if (wiphy->retry_long > IEEE80211_MAX_TX_RETRY)
2075                         return -EINVAL;
2076                 local->hw.conf.long_frame_max_tx_count = wiphy->retry_long;
2077         }
2078         if (changed &
2079             (WIPHY_PARAM_RETRY_SHORT | WIPHY_PARAM_RETRY_LONG))
2080                 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_RETRY_LIMITS);
2081
2082         return 0;
2083 }
2084
2085 static int ieee80211_set_tx_power(struct wiphy *wiphy,
2086                                   struct wireless_dev *wdev,
2087                                   enum nl80211_tx_power_setting type, int mbm)
2088 {
2089         struct ieee80211_local *local = wiphy_priv(wiphy);
2090         struct ieee80211_sub_if_data *sdata;
2091         enum nl80211_tx_power_setting txp_type = type;
2092         bool update_txp_type = false;
2093
2094         if (wdev) {
2095                 sdata = IEEE80211_WDEV_TO_SUB_IF(wdev);
2096
2097                 switch (type) {
2098                 case NL80211_TX_POWER_AUTOMATIC:
2099                         sdata->user_power_level = IEEE80211_UNSET_POWER_LEVEL;
2100                         txp_type = NL80211_TX_POWER_LIMITED;
2101                         break;
2102                 case NL80211_TX_POWER_LIMITED:
2103                 case NL80211_TX_POWER_FIXED:
2104                         if (mbm < 0 || (mbm % 100))
2105                                 return -EOPNOTSUPP;
2106                         sdata->user_power_level = MBM_TO_DBM(mbm);
2107                         break;
2108                 }
2109
2110                 if (txp_type != sdata->vif.bss_conf.txpower_type) {
2111                         update_txp_type = true;
2112                         sdata->vif.bss_conf.txpower_type = txp_type;
2113                 }
2114
2115                 ieee80211_recalc_txpower(sdata, update_txp_type);
2116
2117                 return 0;
2118         }
2119
2120         switch (type) {
2121         case NL80211_TX_POWER_AUTOMATIC:
2122                 local->user_power_level = IEEE80211_UNSET_POWER_LEVEL;
2123                 txp_type = NL80211_TX_POWER_LIMITED;
2124                 break;
2125         case NL80211_TX_POWER_LIMITED:
2126         case NL80211_TX_POWER_FIXED:
2127                 if (mbm < 0 || (mbm % 100))
2128                         return -EOPNOTSUPP;
2129                 local->user_power_level = MBM_TO_DBM(mbm);
2130                 break;
2131         }
2132
2133         mutex_lock(&local->iflist_mtx);
2134         list_for_each_entry(sdata, &local->interfaces, list) {
2135                 sdata->user_power_level = local->user_power_level;
2136                 if (txp_type != sdata->vif.bss_conf.txpower_type)
2137                         update_txp_type = true;
2138                 sdata->vif.bss_conf.txpower_type = txp_type;
2139         }
2140         list_for_each_entry(sdata, &local->interfaces, list)
2141                 ieee80211_recalc_txpower(sdata, update_txp_type);
2142         mutex_unlock(&local->iflist_mtx);
2143
2144         return 0;
2145 }
2146
2147 static int ieee80211_get_tx_power(struct wiphy *wiphy,
2148                                   struct wireless_dev *wdev,
2149                                   int *dbm)
2150 {
2151         struct ieee80211_local *local = wiphy_priv(wiphy);
2152         struct ieee80211_sub_if_data *sdata = IEEE80211_WDEV_TO_SUB_IF(wdev);
2153
2154         if (local->ops->get_txpower)
2155                 return drv_get_txpower(local, sdata, dbm);
2156
2157         if (!local->use_chanctx)
2158                 *dbm = local->hw.conf.power_level;
2159         else
2160                 *dbm = sdata->vif.bss_conf.txpower;
2161
2162         return 0;
2163 }
2164
2165 static int ieee80211_set_wds_peer(struct wiphy *wiphy, struct net_device *dev,
2166                                   const u8 *addr)
2167 {
2168         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2169
2170         memcpy(&sdata->u.wds.remote_addr, addr, ETH_ALEN);
2171
2172         return 0;
2173 }
2174
2175 static void ieee80211_rfkill_poll(struct wiphy *wiphy)
2176 {
2177         struct ieee80211_local *local = wiphy_priv(wiphy);
2178
2179         drv_rfkill_poll(local);
2180 }
2181
2182 #ifdef CONFIG_NL80211_TESTMODE
2183 static int ieee80211_testmode_cmd(struct wiphy *wiphy,
2184                                   struct wireless_dev *wdev,
2185                                   void *data, int len)
2186 {
2187         struct ieee80211_local *local = wiphy_priv(wiphy);
2188         struct ieee80211_vif *vif = NULL;
2189
2190         if (!local->ops->testmode_cmd)
2191                 return -EOPNOTSUPP;
2192
2193         if (wdev) {
2194                 struct ieee80211_sub_if_data *sdata;
2195
2196                 sdata = IEEE80211_WDEV_TO_SUB_IF(wdev);
2197                 if (sdata->flags & IEEE80211_SDATA_IN_DRIVER)
2198                         vif = &sdata->vif;
2199         }
2200
2201         return local->ops->testmode_cmd(&local->hw, vif, data, len);
2202 }
2203
2204 static int ieee80211_testmode_dump(struct wiphy *wiphy,
2205                                    struct sk_buff *skb,
2206                                    struct netlink_callback *cb,
2207                                    void *data, int len)
2208 {
2209         struct ieee80211_local *local = wiphy_priv(wiphy);
2210
2211         if (!local->ops->testmode_dump)
2212                 return -EOPNOTSUPP;
2213
2214         return local->ops->testmode_dump(&local->hw, skb, cb, data, len);
2215 }
2216 #endif
2217
2218 int __ieee80211_request_smps_ap(struct ieee80211_sub_if_data *sdata,
2219                                 enum ieee80211_smps_mode smps_mode)
2220 {
2221         struct sta_info *sta;
2222         enum ieee80211_smps_mode old_req;
2223
2224         if (WARN_ON_ONCE(sdata->vif.type != NL80211_IFTYPE_AP))
2225                 return -EINVAL;
2226
2227         if (sdata->vif.bss_conf.chandef.width == NL80211_CHAN_WIDTH_20_NOHT)
2228                 return 0;
2229
2230         old_req = sdata->u.ap.req_smps;
2231         sdata->u.ap.req_smps = smps_mode;
2232
2233         /* AUTOMATIC doesn't mean much for AP - don't allow it */
2234         if (old_req == smps_mode ||
2235             smps_mode == IEEE80211_SMPS_AUTOMATIC)
2236                 return 0;
2237
2238          /* If no associated stations, there's no need to do anything */
2239         if (!atomic_read(&sdata->u.ap.num_mcast_sta)) {
2240                 sdata->smps_mode = smps_mode;
2241                 ieee80211_queue_work(&sdata->local->hw, &sdata->recalc_smps);
2242                 return 0;
2243         }
2244
2245         ht_dbg(sdata,
2246                "SMPS %d requested in AP mode, sending Action frame to %d stations\n",
2247                smps_mode, atomic_read(&sdata->u.ap.num_mcast_sta));
2248
2249         mutex_lock(&sdata->local->sta_mtx);
2250         list_for_each_entry(sta, &sdata->local->sta_list, list) {
2251                 /*
2252                  * Only stations associated to our AP and
2253                  * associated VLANs
2254                  */
2255                 if (sta->sdata->bss != &sdata->u.ap)
2256                         continue;
2257
2258                 /* This station doesn't support MIMO - skip it */
2259                 if (sta_info_tx_streams(sta) == 1)
2260                         continue;
2261
2262                 /*
2263                  * Don't wake up a STA just to send the action frame
2264                  * unless we are getting more restrictive.
2265                  */
2266                 if (test_sta_flag(sta, WLAN_STA_PS_STA) &&
2267                     !ieee80211_smps_is_restrictive(sta->known_smps_mode,
2268                                                    smps_mode)) {
2269                         ht_dbg(sdata, "Won't send SMPS to sleeping STA %pM\n",
2270                                sta->sta.addr);
2271                         continue;
2272                 }
2273
2274                 /*
2275                  * If the STA is not authorized, wait until it gets
2276                  * authorized and the action frame will be sent then.
2277                  */
2278                 if (!test_sta_flag(sta, WLAN_STA_AUTHORIZED))
2279                         continue;
2280
2281                 ht_dbg(sdata, "Sending SMPS to %pM\n", sta->sta.addr);
2282                 ieee80211_send_smps_action(sdata, smps_mode, sta->sta.addr,
2283                                            sdata->vif.bss_conf.bssid);
2284         }
2285         mutex_unlock(&sdata->local->sta_mtx);
2286
2287         sdata->smps_mode = smps_mode;
2288         ieee80211_queue_work(&sdata->local->hw, &sdata->recalc_smps);
2289
2290         return 0;
2291 }
2292
2293 int __ieee80211_request_smps_mgd(struct ieee80211_sub_if_data *sdata,
2294                                  enum ieee80211_smps_mode smps_mode)
2295 {
2296         const u8 *ap;
2297         enum ieee80211_smps_mode old_req;
2298         int err;
2299         struct sta_info *sta;
2300         bool tdls_peer_found = false;
2301
2302         lockdep_assert_held(&sdata->wdev.mtx);
2303
2304         if (WARN_ON_ONCE(sdata->vif.type != NL80211_IFTYPE_STATION))
2305                 return -EINVAL;
2306
2307         old_req = sdata->u.mgd.req_smps;
2308         sdata->u.mgd.req_smps = smps_mode;
2309
2310         if (old_req == smps_mode &&
2311             smps_mode != IEEE80211_SMPS_AUTOMATIC)
2312                 return 0;
2313
2314         /*
2315          * If not associated, or current association is not an HT
2316          * association, there's no need to do anything, just store
2317          * the new value until we associate.
2318          */
2319         if (!sdata->u.mgd.associated ||
2320             sdata->vif.bss_conf.chandef.width == NL80211_CHAN_WIDTH_20_NOHT)
2321                 return 0;
2322
2323         ap = sdata->u.mgd.associated->bssid;
2324
2325         rcu_read_lock();
2326         list_for_each_entry_rcu(sta, &sdata->local->sta_list, list) {
2327                 if (!sta->sta.tdls || sta->sdata != sdata || !sta->uploaded ||
2328                     !test_sta_flag(sta, WLAN_STA_AUTHORIZED))
2329                         continue;
2330
2331                 tdls_peer_found = true;
2332                 break;
2333         }
2334         rcu_read_unlock();
2335
2336         if (smps_mode == IEEE80211_SMPS_AUTOMATIC) {
2337                 if (tdls_peer_found || !sdata->u.mgd.powersave)
2338                         smps_mode = IEEE80211_SMPS_OFF;
2339                 else
2340                         smps_mode = IEEE80211_SMPS_DYNAMIC;
2341         }
2342
2343         /* send SM PS frame to AP */
2344         err = ieee80211_send_smps_action(sdata, smps_mode,
2345                                          ap, ap);
2346         if (err)
2347                 sdata->u.mgd.req_smps = old_req;
2348         else if (smps_mode != IEEE80211_SMPS_OFF && tdls_peer_found)
2349                 ieee80211_teardown_tdls_peers(sdata);
2350
2351         return err;
2352 }
2353
2354 static int ieee80211_set_power_mgmt(struct wiphy *wiphy, struct net_device *dev,
2355                                     bool enabled, int timeout)
2356 {
2357         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2358         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2359
2360         if (sdata->vif.type != NL80211_IFTYPE_STATION)
2361                 return -EOPNOTSUPP;
2362
2363         if (!ieee80211_hw_check(&local->hw, SUPPORTS_PS))
2364                 return -EOPNOTSUPP;
2365
2366         if (enabled == sdata->u.mgd.powersave &&
2367             timeout == local->dynamic_ps_forced_timeout)
2368                 return 0;
2369
2370         sdata->u.mgd.powersave = enabled;
2371         local->dynamic_ps_forced_timeout = timeout;
2372
2373         /* no change, but if automatic follow powersave */
2374         sdata_lock(sdata);
2375         __ieee80211_request_smps_mgd(sdata, sdata->u.mgd.req_smps);
2376         sdata_unlock(sdata);
2377
2378         if (ieee80211_hw_check(&local->hw, SUPPORTS_DYNAMIC_PS))
2379                 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
2380
2381         ieee80211_recalc_ps(local);
2382         ieee80211_recalc_ps_vif(sdata);
2383
2384         return 0;
2385 }
2386
2387 static int ieee80211_set_cqm_rssi_config(struct wiphy *wiphy,
2388                                          struct net_device *dev,
2389                                          s32 rssi_thold, u32 rssi_hyst)
2390 {
2391         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2392         struct ieee80211_vif *vif = &sdata->vif;
2393         struct ieee80211_bss_conf *bss_conf = &vif->bss_conf;
2394
2395         if (rssi_thold == bss_conf->cqm_rssi_thold &&
2396             rssi_hyst == bss_conf->cqm_rssi_hyst)
2397                 return 0;
2398
2399         if (sdata->vif.driver_flags & IEEE80211_VIF_BEACON_FILTER &&
2400             !(sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI))
2401                 return -EOPNOTSUPP;
2402
2403         bss_conf->cqm_rssi_thold = rssi_thold;
2404         bss_conf->cqm_rssi_hyst = rssi_hyst;
2405         sdata->u.mgd.last_cqm_event_signal = 0;
2406
2407         /* tell the driver upon association, unless already associated */
2408         if (sdata->u.mgd.associated &&
2409             sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI)
2410                 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_CQM);
2411
2412         return 0;
2413 }
2414
2415 static int ieee80211_set_bitrate_mask(struct wiphy *wiphy,
2416                                       struct net_device *dev,
2417                                       const u8 *addr,
2418                                       const struct cfg80211_bitrate_mask *mask)
2419 {
2420         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2421         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2422         int i, ret;
2423
2424         if (!ieee80211_sdata_running(sdata))
2425                 return -ENETDOWN;
2426
2427         if (ieee80211_hw_check(&local->hw, HAS_RATE_CONTROL)) {
2428                 ret = drv_set_bitrate_mask(local, sdata, mask);
2429                 if (ret)
2430                         return ret;
2431         }
2432
2433         for (i = 0; i < IEEE80211_NUM_BANDS; i++) {
2434                 struct ieee80211_supported_band *sband = wiphy->bands[i];
2435                 int j;
2436
2437                 sdata->rc_rateidx_mask[i] = mask->control[i].legacy;
2438                 memcpy(sdata->rc_rateidx_mcs_mask[i], mask->control[i].ht_mcs,
2439                        sizeof(mask->control[i].ht_mcs));
2440                 memcpy(sdata->rc_rateidx_vht_mcs_mask[i],
2441                        mask->control[i].vht_mcs,
2442                        sizeof(mask->control[i].vht_mcs));
2443
2444                 sdata->rc_has_mcs_mask[i] = false;
2445                 sdata->rc_has_vht_mcs_mask[i] = false;
2446                 if (!sband)
2447                         continue;
2448
2449                 for (j = 0; j < IEEE80211_HT_MCS_MASK_LEN; j++) {
2450                         if (~sdata->rc_rateidx_mcs_mask[i][j]) {
2451                                 sdata->rc_has_mcs_mask[i] = true;
2452                                 break;
2453                         }
2454                 }
2455
2456                 for (j = 0; j < NL80211_VHT_NSS_MAX; j++) {
2457                         if (~sdata->rc_rateidx_vht_mcs_mask[i][j]) {
2458                                 sdata->rc_has_vht_mcs_mask[i] = true;
2459                                 break;
2460                         }
2461                 }
2462         }
2463
2464         return 0;
2465 }
2466
2467 static bool ieee80211_coalesce_started_roc(struct ieee80211_local *local,
2468                                            struct ieee80211_roc_work *new_roc,
2469                                            struct ieee80211_roc_work *cur_roc)
2470 {
2471         unsigned long now = jiffies;
2472         unsigned long remaining = cur_roc->hw_start_time +
2473                                   msecs_to_jiffies(cur_roc->duration) -
2474                                   now;
2475
2476         if (WARN_ON(!cur_roc->started || !cur_roc->hw_begun))
2477                 return false;
2478
2479         /* if it doesn't fit entirely, schedule a new one */
2480         if (new_roc->duration > jiffies_to_msecs(remaining))
2481                 return false;
2482
2483         ieee80211_handle_roc_started(new_roc);
2484
2485         /* add to dependents so we send the expired event properly */
2486         list_add_tail(&new_roc->list, &cur_roc->dependents);
2487         return true;
2488 }
2489
2490 static u64 ieee80211_mgmt_tx_cookie(struct ieee80211_local *local)
2491 {
2492         lockdep_assert_held(&local->mtx);
2493
2494         local->roc_cookie_counter++;
2495
2496         /* wow, you wrapped 64 bits ... more likely a bug */
2497         if (WARN_ON(local->roc_cookie_counter == 0))
2498                 local->roc_cookie_counter++;
2499
2500         return local->roc_cookie_counter;
2501 }
2502
2503 static int ieee80211_start_roc_work(struct ieee80211_local *local,
2504                                     struct ieee80211_sub_if_data *sdata,
2505                                     struct ieee80211_channel *channel,
2506                                     unsigned int duration, u64 *cookie,
2507                                     struct sk_buff *txskb,
2508                                     enum ieee80211_roc_type type)
2509 {
2510         struct ieee80211_roc_work *roc, *tmp;
2511         bool queued = false;
2512         int ret;
2513
2514         lockdep_assert_held(&local->mtx);
2515
2516         if (local->use_chanctx && !local->ops->remain_on_channel)
2517                 return -EOPNOTSUPP;
2518
2519         roc = kzalloc(sizeof(*roc), GFP_KERNEL);
2520         if (!roc)
2521                 return -ENOMEM;
2522
2523         /*
2524          * If the duration is zero, then the driver
2525          * wouldn't actually do anything. Set it to
2526          * 10 for now.
2527          *
2528          * TODO: cancel the off-channel operation
2529          *       when we get the SKB's TX status and
2530          *       the wait time was zero before.
2531          */
2532         if (!duration)
2533                 duration = 10;
2534
2535         roc->chan = channel;
2536         roc->duration = duration;
2537         roc->req_duration = duration;
2538         roc->frame = txskb;
2539         roc->type = type;
2540         roc->sdata = sdata;
2541         INIT_DELAYED_WORK(&roc->work, ieee80211_sw_roc_work);
2542         INIT_LIST_HEAD(&roc->dependents);
2543
2544         /*
2545          * cookie is either the roc cookie (for normal roc)
2546          * or the SKB (for mgmt TX)
2547          */
2548         if (!txskb) {
2549                 roc->cookie = ieee80211_mgmt_tx_cookie(local);
2550                 *cookie = roc->cookie;
2551         } else {
2552                 roc->mgmt_tx_cookie = *cookie;
2553         }
2554
2555         /* if there's one pending or we're scanning, queue this one */
2556         if (!list_empty(&local->roc_list) ||
2557             local->scanning || ieee80211_is_radar_required(local))
2558                 goto out_check_combine;
2559
2560         /* if not HW assist, just queue & schedule work */
2561         if (!local->ops->remain_on_channel) {
2562                 ieee80211_queue_delayed_work(&local->hw, &roc->work, 0);
2563                 goto out_queue;
2564         }
2565
2566         /* otherwise actually kick it off here (for error handling) */
2567
2568         ret = drv_remain_on_channel(local, sdata, channel, duration, type);
2569         if (ret) {
2570                 kfree(roc);
2571                 return ret;
2572         }
2573
2574         roc->started = true;
2575         goto out_queue;
2576
2577  out_check_combine:
2578         list_for_each_entry(tmp, &local->roc_list, list) {
2579                 if (tmp->chan != channel || tmp->sdata != sdata)
2580                         continue;
2581
2582                 /*
2583                  * Extend this ROC if possible:
2584                  *
2585                  * If it hasn't started yet, just increase the duration
2586                  * and add the new one to the list of dependents.
2587                  * If the type of the new ROC has higher priority, modify the
2588                  * type of the previous one to match that of the new one.
2589                  */
2590                 if (!tmp->started) {
2591                         list_add_tail(&roc->list, &tmp->dependents);
2592                         tmp->duration = max(tmp->duration, roc->duration);
2593                         tmp->type = max(tmp->type, roc->type);
2594                         queued = true;
2595                         break;
2596                 }
2597
2598                 /* If it has already started, it's more difficult ... */
2599                 if (local->ops->remain_on_channel) {
2600                         /*
2601                          * In the offloaded ROC case, if it hasn't begun, add
2602                          * this new one to the dependent list to be handled
2603                          * when the master one begins. If it has begun,
2604                          * check if it fits entirely within the existing one,
2605                          * in which case it will just be dependent as well.
2606                          * Otherwise, schedule it by itself.
2607                          */
2608                         if (!tmp->hw_begun) {
2609                                 list_add_tail(&roc->list, &tmp->dependents);
2610                                 queued = true;
2611                                 break;
2612                         }
2613
2614                         if (ieee80211_coalesce_started_roc(local, roc, tmp))
2615                                 queued = true;
2616                 } else if (del_timer_sync(&tmp->work.timer)) {
2617                         unsigned long new_end;
2618
2619                         /*
2620                          * In the software ROC case, cancel the timer, if
2621                          * that fails then the finish work is already
2622                          * queued/pending and thus we queue the new ROC
2623                          * normally, if that succeeds then we can extend
2624                          * the timer duration and TX the frame (if any.)
2625                          */
2626
2627                         list_add_tail(&roc->list, &tmp->dependents);
2628                         queued = true;
2629
2630                         new_end = jiffies + msecs_to_jiffies(roc->duration);
2631
2632                         /* ok, it was started & we canceled timer */
2633                         if (time_after(new_end, tmp->work.timer.expires))
2634                                 mod_timer(&tmp->work.timer, new_end);
2635                         else
2636                                 add_timer(&tmp->work.timer);
2637
2638                         ieee80211_handle_roc_started(roc);
2639                 }
2640                 break;
2641         }
2642
2643  out_queue:
2644         if (!queued)
2645                 list_add_tail(&roc->list, &local->roc_list);
2646
2647         return 0;
2648 }
2649
2650 static int ieee80211_remain_on_channel(struct wiphy *wiphy,
2651                                        struct wireless_dev *wdev,
2652                                        struct ieee80211_channel *chan,
2653                                        unsigned int duration,
2654                                        u64 *cookie)
2655 {
2656         struct ieee80211_sub_if_data *sdata = IEEE80211_WDEV_TO_SUB_IF(wdev);
2657         struct ieee80211_local *local = sdata->local;
2658         int ret;
2659
2660         mutex_lock(&local->mtx);
2661         ret = ieee80211_start_roc_work(local, sdata, chan,
2662                                        duration, cookie, NULL,
2663                                        IEEE80211_ROC_TYPE_NORMAL);
2664         mutex_unlock(&local->mtx);
2665
2666         return ret;
2667 }
2668
2669 static int ieee80211_cancel_roc(struct ieee80211_local *local,
2670                                 u64 cookie, bool mgmt_tx)
2671 {
2672         struct ieee80211_roc_work *roc, *tmp, *found = NULL;
2673         int ret;
2674
2675         mutex_lock(&local->mtx);
2676         list_for_each_entry_safe(roc, tmp, &local->roc_list, list) {
2677                 struct ieee80211_roc_work *dep, *tmp2;
2678
2679                 list_for_each_entry_safe(dep, tmp2, &roc->dependents, list) {
2680                         if (!mgmt_tx && dep->cookie != cookie)
2681                                 continue;
2682                         else if (mgmt_tx && dep->mgmt_tx_cookie != cookie)
2683                                 continue;
2684                         /* found dependent item -- just remove it */
2685                         list_del(&dep->list);
2686                         mutex_unlock(&local->mtx);
2687
2688                         ieee80211_roc_notify_destroy(dep, true);
2689                         return 0;
2690                 }
2691
2692                 if (!mgmt_tx && roc->cookie != cookie)
2693                         continue;
2694                 else if (mgmt_tx && roc->mgmt_tx_cookie != cookie)
2695                         continue;
2696
2697                 found = roc;
2698                 break;
2699         }
2700
2701         if (!found) {
2702                 mutex_unlock(&local->mtx);
2703                 return -ENOENT;
2704         }
2705
2706         /*
2707          * We found the item to cancel, so do that. Note that it
2708          * may have dependents, which we also cancel (and send
2709          * the expired signal for.) Not doing so would be quite
2710          * tricky here, but we may need to fix it later.
2711          */
2712
2713         if (local->ops->remain_on_channel) {
2714                 if (found->started) {
2715                         ret = drv_cancel_remain_on_channel(local);
2716                         if (WARN_ON_ONCE(ret)) {
2717                                 mutex_unlock(&local->mtx);
2718                                 return ret;
2719                         }
2720                 }
2721
2722                 list_del(&found->list);
2723
2724                 if (found->started)
2725                         ieee80211_start_next_roc(local);
2726                 mutex_unlock(&local->mtx);
2727
2728                 ieee80211_roc_notify_destroy(found, true);
2729         } else {
2730                 /* work may be pending so use it all the time */
2731                 found->abort = true;
2732                 ieee80211_queue_delayed_work(&local->hw, &found->work, 0);
2733
2734                 mutex_unlock(&local->mtx);
2735
2736                 /* work will clean up etc */
2737                 flush_delayed_work(&found->work);
2738                 WARN_ON(!found->to_be_freed);
2739                 kfree(found);
2740         }
2741
2742         return 0;
2743 }
2744
2745 static int ieee80211_cancel_remain_on_channel(struct wiphy *wiphy,
2746                                               struct wireless_dev *wdev,
2747                                               u64 cookie)
2748 {
2749         struct ieee80211_sub_if_data *sdata = IEEE80211_WDEV_TO_SUB_IF(wdev);
2750         struct ieee80211_local *local = sdata->local;
2751
2752         return ieee80211_cancel_roc(local, cookie, false);
2753 }
2754
2755 static int ieee80211_start_radar_detection(struct wiphy *wiphy,
2756                                            struct net_device *dev,
2757                                            struct cfg80211_chan_def *chandef,
2758                                            u32 cac_time_ms)
2759 {
2760         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2761         struct ieee80211_local *local = sdata->local;
2762         int err;
2763
2764         mutex_lock(&local->mtx);
2765         if (!list_empty(&local->roc_list) || local->scanning) {
2766                 err = -EBUSY;
2767                 goto out_unlock;
2768         }
2769
2770         /* whatever, but channel contexts should not complain about that one */
2771         sdata->smps_mode = IEEE80211_SMPS_OFF;
2772         sdata->needed_rx_chains = local->rx_chains;
2773
2774         err = ieee80211_vif_use_channel(sdata, chandef,
2775                                         IEEE80211_CHANCTX_SHARED);
2776         if (err)
2777                 goto out_unlock;
2778
2779         ieee80211_queue_delayed_work(&sdata->local->hw,
2780                                      &sdata->dfs_cac_timer_work,
2781                                      msecs_to_jiffies(cac_time_ms));
2782
2783  out_unlock:
2784         mutex_unlock(&local->mtx);
2785         return err;
2786 }
2787
2788 static struct cfg80211_beacon_data *
2789 cfg80211_beacon_dup(struct cfg80211_beacon_data *beacon)
2790 {
2791         struct cfg80211_beacon_data *new_beacon;
2792         u8 *pos;
2793         int len;
2794
2795         len = beacon->head_len + beacon->tail_len + beacon->beacon_ies_len +
2796               beacon->proberesp_ies_len + beacon->assocresp_ies_len +
2797               beacon->probe_resp_len;
2798
2799         new_beacon = kzalloc(sizeof(*new_beacon) + len, GFP_KERNEL);
2800         if (!new_beacon)
2801                 return NULL;
2802
2803         pos = (u8 *)(new_beacon + 1);
2804         if (beacon->head_len) {
2805                 new_beacon->head_len = beacon->head_len;
2806                 new_beacon->head = pos;
2807                 memcpy(pos, beacon->head, beacon->head_len);
2808                 pos += beacon->head_len;
2809         }
2810         if (beacon->tail_len) {
2811                 new_beacon->tail_len = beacon->tail_len;
2812                 new_beacon->tail = pos;
2813                 memcpy(pos, beacon->tail, beacon->tail_len);
2814                 pos += beacon->tail_len;
2815         }
2816         if (beacon->beacon_ies_len) {
2817                 new_beacon->beacon_ies_len = beacon->beacon_ies_len;
2818                 new_beacon->beacon_ies = pos;
2819                 memcpy(pos, beacon->beacon_ies, beacon->beacon_ies_len);
2820                 pos += beacon->beacon_ies_len;
2821         }
2822         if (beacon->proberesp_ies_len) {
2823                 new_beacon->proberesp_ies_len = beacon->proberesp_ies_len;
2824                 new_beacon->proberesp_ies = pos;
2825                 memcpy(pos, beacon->proberesp_ies, beacon->proberesp_ies_len);
2826                 pos += beacon->proberesp_ies_len;
2827         }
2828         if (beacon->assocresp_ies_len) {
2829                 new_beacon->assocresp_ies_len = beacon->assocresp_ies_len;
2830                 new_beacon->assocresp_ies = pos;
2831                 memcpy(pos, beacon->assocresp_ies, beacon->assocresp_ies_len);
2832                 pos += beacon->assocresp_ies_len;
2833         }
2834         if (beacon->probe_resp_len) {
2835                 new_beacon->probe_resp_len = beacon->probe_resp_len;
2836                 new_beacon->probe_resp = pos;
2837                 memcpy(pos, beacon->probe_resp, beacon->probe_resp_len);
2838                 pos += beacon->probe_resp_len;
2839         }
2840
2841         return new_beacon;
2842 }
2843
2844 void ieee80211_csa_finish(struct ieee80211_vif *vif)
2845 {
2846         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2847
2848         ieee80211_queue_work(&sdata->local->hw,
2849                              &sdata->csa_finalize_work);
2850 }
2851 EXPORT_SYMBOL(ieee80211_csa_finish);
2852
2853 static int ieee80211_set_after_csa_beacon(struct ieee80211_sub_if_data *sdata,
2854                                           u32 *changed)
2855 {
2856         int err;
2857
2858         switch (sdata->vif.type) {
2859         case NL80211_IFTYPE_AP:
2860                 err = ieee80211_assign_beacon(sdata, sdata->u.ap.next_beacon,
2861                                               NULL);
2862                 kfree(sdata->u.ap.next_beacon);
2863                 sdata->u.ap.next_beacon = NULL;
2864
2865                 if (err < 0)
2866                         return err;
2867                 *changed |= err;
2868                 break;
2869         case NL80211_IFTYPE_ADHOC:
2870                 err = ieee80211_ibss_finish_csa(sdata);
2871                 if (err < 0)
2872                         return err;
2873                 *changed |= err;
2874                 break;
2875 #ifdef CONFIG_MAC80211_MESH
2876         case NL80211_IFTYPE_MESH_POINT:
2877                 err = ieee80211_mesh_finish_csa(sdata);
2878                 if (err < 0)
2879                         return err;
2880                 *changed |= err;
2881                 break;
2882 #endif
2883         default:
2884                 WARN_ON(1);
2885                 return -EINVAL;
2886         }
2887
2888         return 0;
2889 }
2890
2891 static int __ieee80211_csa_finalize(struct ieee80211_sub_if_data *sdata)
2892 {
2893         struct ieee80211_local *local = sdata->local;
2894         u32 changed = 0;
2895         int err;
2896
2897         sdata_assert_lock(sdata);
2898         lockdep_assert_held(&local->mtx);
2899         lockdep_assert_held(&local->chanctx_mtx);
2900
2901         /*
2902          * using reservation isn't immediate as it may be deferred until later
2903          * with multi-vif. once reservation is complete it will re-schedule the
2904          * work with no reserved_chanctx so verify chandef to check if it
2905          * completed successfully
2906          */
2907
2908         if (sdata->reserved_chanctx) {
2909                 /*
2910                  * with multi-vif csa driver may call ieee80211_csa_finish()
2911                  * many times while waiting for other interfaces to use their
2912                  * reservations
2913                  */
2914                 if (sdata->reserved_ready)
2915                         return 0;
2916
2917                 return ieee80211_vif_use_reserved_context(sdata);
2918         }
2919
2920         if (!cfg80211_chandef_identical(&sdata->vif.bss_conf.chandef,
2921                                         &sdata->csa_chandef))
2922                 return -EINVAL;
2923
2924         sdata->vif.csa_active = false;
2925
2926         err = ieee80211_set_after_csa_beacon(sdata, &changed);
2927         if (err)
2928                 return err;
2929
2930         ieee80211_bss_info_change_notify(sdata, changed);
2931
2932         if (sdata->csa_block_tx) {
2933                 ieee80211_wake_vif_queues(local, sdata,
2934                                           IEEE80211_QUEUE_STOP_REASON_CSA);
2935                 sdata->csa_block_tx = false;
2936         }
2937
2938         err = drv_post_channel_switch(sdata);
2939         if (err)
2940                 return err;
2941
2942         cfg80211_ch_switch_notify(sdata->dev, &sdata->csa_chandef);
2943
2944         return 0;
2945 }
2946
2947 static void ieee80211_csa_finalize(struct ieee80211_sub_if_data *sdata)
2948 {
2949         if (__ieee80211_csa_finalize(sdata)) {
2950                 sdata_info(sdata, "failed to finalize CSA, disconnecting\n");
2951                 cfg80211_stop_iface(sdata->local->hw.wiphy, &sdata->wdev,
2952                                     GFP_KERNEL);
2953         }
2954 }
2955
2956 void ieee80211_csa_finalize_work(struct work_struct *work)
2957 {
2958         struct ieee80211_sub_if_data *sdata =
2959                 container_of(work, struct ieee80211_sub_if_data,
2960                              csa_finalize_work);
2961         struct ieee80211_local *local = sdata->local;
2962
2963         sdata_lock(sdata);
2964         mutex_lock(&local->mtx);
2965         mutex_lock(&local->chanctx_mtx);
2966
2967         /* AP might have been stopped while waiting for the lock. */
2968         if (!sdata->vif.csa_active)
2969                 goto unlock;
2970
2971         if (!ieee80211_sdata_running(sdata))
2972                 goto unlock;
2973
2974         ieee80211_csa_finalize(sdata);
2975
2976 unlock:
2977         mutex_unlock(&local->chanctx_mtx);
2978         mutex_unlock(&local->mtx);
2979         sdata_unlock(sdata);
2980 }
2981
2982 static int ieee80211_set_csa_beacon(struct ieee80211_sub_if_data *sdata,
2983                                     struct cfg80211_csa_settings *params,
2984                                     u32 *changed)
2985 {
2986         struct ieee80211_csa_settings csa = {};
2987         int err;
2988
2989         switch (sdata->vif.type) {
2990         case NL80211_IFTYPE_AP:
2991                 sdata->u.ap.next_beacon =
2992                         cfg80211_beacon_dup(&params->beacon_after);
2993                 if (!sdata->u.ap.next_beacon)
2994                         return -ENOMEM;
2995
2996                 /*
2997                  * With a count of 0, we don't have to wait for any
2998                  * TBTT before switching, so complete the CSA
2999                  * immediately.  In theory, with a count == 1 we
3000                  * should delay the switch until just before the next
3001                  * TBTT, but that would complicate things so we switch
3002                  * immediately too.  If we would delay the switch
3003                  * until the next TBTT, we would have to set the probe
3004                  * response here.
3005                  *
3006                  * TODO: A channel switch with count <= 1 without
3007                  * sending a CSA action frame is kind of useless,
3008                  * because the clients won't know we're changing
3009                  * channels.  The action frame must be implemented
3010                  * either here or in the userspace.
3011                  */
3012                 if (params->count <= 1)
3013                         break;
3014
3015                 if ((params->n_counter_offsets_beacon >
3016                      IEEE80211_MAX_CSA_COUNTERS_NUM) ||
3017                     (params->n_counter_offsets_presp >
3018                      IEEE80211_MAX_CSA_COUNTERS_NUM))
3019                         return -EINVAL;
3020
3021                 csa.counter_offsets_beacon = params->counter_offsets_beacon;
3022                 csa.counter_offsets_presp = params->counter_offsets_presp;
3023                 csa.n_counter_offsets_beacon = params->n_counter_offsets_beacon;
3024                 csa.n_counter_offsets_presp = params->n_counter_offsets_presp;
3025                 csa.count = params->count;
3026
3027                 err = ieee80211_assign_beacon(sdata, &params->beacon_csa, &csa);
3028                 if (err < 0) {
3029                         kfree(sdata->u.ap.next_beacon);
3030                         return err;
3031                 }
3032                 *changed |= err;
3033
3034                 break;
3035         case NL80211_IFTYPE_ADHOC:
3036                 if (!sdata->vif.bss_conf.ibss_joined)
3037                         return -EINVAL;
3038
3039                 if (params->chandef.width != sdata->u.ibss.chandef.width)
3040                         return -EINVAL;
3041
3042                 switch (params->chandef.width) {
3043                 case NL80211_CHAN_WIDTH_40:
3044                         if (cfg80211_get_chandef_type(&params->chandef) !=
3045                             cfg80211_get_chandef_type(&sdata->u.ibss.chandef))
3046                                 return -EINVAL;
3047                 case NL80211_CHAN_WIDTH_5:
3048                 case NL80211_CHAN_WIDTH_10:
3049                 case NL80211_CHAN_WIDTH_20_NOHT:
3050                 case NL80211_CHAN_WIDTH_20:
3051                         break;
3052                 default:
3053                         return -EINVAL;
3054                 }
3055
3056                 /* changes into another band are not supported */
3057                 if (sdata->u.ibss.chandef.chan->band !=
3058                     params->chandef.chan->band)
3059                         return -EINVAL;
3060
3061                 /* see comments in the NL80211_IFTYPE_AP block */
3062                 if (params->count > 1) {
3063                         err = ieee80211_ibss_csa_beacon(sdata, params);
3064                         if (err < 0)
3065                                 return err;
3066                         *changed |= err;
3067                 }
3068
3069                 ieee80211_send_action_csa(sdata, params);
3070
3071                 break;
3072 #ifdef CONFIG_MAC80211_MESH
3073         case NL80211_IFTYPE_MESH_POINT: {
3074                 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
3075
3076                 if (params->chandef.width != sdata->vif.bss_conf.chandef.width)
3077                         return -EINVAL;
3078
3079                 /* changes into another band are not supported */
3080                 if (sdata->vif.bss_conf.chandef.chan->band !=
3081                     params->chandef.chan->band)
3082                         return -EINVAL;
3083
3084                 if (ifmsh->csa_role == IEEE80211_MESH_CSA_ROLE_NONE) {
3085                         ifmsh->csa_role = IEEE80211_MESH_CSA_ROLE_INIT;
3086                         if (!ifmsh->pre_value)
3087                                 ifmsh->pre_value = 1;
3088                         else
3089                                 ifmsh->pre_value++;
3090                 }
3091
3092                 /* see comments in the NL80211_IFTYPE_AP block */
3093                 if (params->count > 1) {
3094                         err = ieee80211_mesh_csa_beacon(sdata, params);
3095                         if (err < 0) {
3096                                 ifmsh->csa_role = IEEE80211_MESH_CSA_ROLE_NONE;
3097                                 return err;
3098                         }
3099                         *changed |= err;
3100                 }
3101
3102                 if (ifmsh->csa_role == IEEE80211_MESH_CSA_ROLE_INIT)
3103                         ieee80211_send_action_csa(sdata, params);
3104
3105                 break;
3106                 }
3107 #endif
3108         default:
3109                 return -EOPNOTSUPP;
3110         }
3111
3112         return 0;
3113 }
3114
3115 static int
3116 __ieee80211_channel_switch(struct wiphy *wiphy, struct net_device *dev,
3117                            struct cfg80211_csa_settings *params)
3118 {
3119         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3120         struct ieee80211_local *local = sdata->local;
3121         struct ieee80211_channel_switch ch_switch;
3122         struct ieee80211_chanctx_conf *conf;
3123         struct ieee80211_chanctx *chanctx;
3124         u32 changed = 0;
3125         int err;
3126
3127         sdata_assert_lock(sdata);
3128         lockdep_assert_held(&local->mtx);
3129
3130         if (!list_empty(&local->roc_list) || local->scanning)
3131                 return -EBUSY;
3132
3133         if (sdata->wdev.cac_started)
3134                 return -EBUSY;
3135
3136         if (cfg80211_chandef_identical(&params->chandef,
3137                                        &sdata->vif.bss_conf.chandef))
3138                 return -EINVAL;
3139
3140         /* don't allow another channel switch if one is already active. */
3141         if (sdata->vif.csa_active)
3142                 return -EBUSY;
3143
3144         mutex_lock(&local->chanctx_mtx);
3145         conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
3146                                          lockdep_is_held(&local->chanctx_mtx));
3147         if (!conf) {
3148                 err = -EBUSY;
3149                 goto out;
3150         }
3151
3152         chanctx = container_of(conf, struct ieee80211_chanctx, conf);
3153         if (!chanctx) {
3154                 err = -EBUSY;
3155                 goto out;
3156         }
3157
3158         ch_switch.timestamp = 0;
3159         ch_switch.device_timestamp = 0;
3160         ch_switch.block_tx = params->block_tx;
3161         ch_switch.chandef = params->chandef;
3162         ch_switch.count = params->count;
3163
3164         err = drv_pre_channel_switch(sdata, &ch_switch);
3165         if (err)
3166                 goto out;
3167
3168         err = ieee80211_vif_reserve_chanctx(sdata, &params->chandef,
3169                                             chanctx->mode,
3170                                             params->radar_required);
3171         if (err)
3172                 goto out;
3173
3174         /* if reservation is invalid then this will fail */
3175         err = ieee80211_check_combinations(sdata, NULL, chanctx->mode, 0);
3176         if (err) {
3177                 ieee80211_vif_unreserve_chanctx(sdata);
3178                 goto out;
3179         }
3180
3181         err = ieee80211_set_csa_beacon(sdata, params, &changed);
3182         if (err) {
3183                 ieee80211_vif_unreserve_chanctx(sdata);
3184                 goto out;
3185         }
3186
3187         sdata->csa_chandef = params->chandef;
3188         sdata->csa_block_tx = params->block_tx;
3189         sdata->vif.csa_active = true;
3190
3191         if (sdata->csa_block_tx)
3192                 ieee80211_stop_vif_queues(local, sdata,
3193                                           IEEE80211_QUEUE_STOP_REASON_CSA);
3194
3195         cfg80211_ch_switch_started_notify(sdata->dev, &sdata->csa_chandef,
3196                                           params->count);
3197
3198         if (changed) {
3199                 ieee80211_bss_info_change_notify(sdata, changed);
3200                 drv_channel_switch_beacon(sdata, &params->chandef);
3201         } else {
3202                 /* if the beacon didn't change, we can finalize immediately */
3203                 ieee80211_csa_finalize(sdata);
3204         }
3205
3206 out:
3207         mutex_unlock(&local->chanctx_mtx);
3208         return err;
3209 }
3210
3211 int ieee80211_channel_switch(struct wiphy *wiphy, struct net_device *dev,
3212                              struct cfg80211_csa_settings *params)
3213 {
3214         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3215         struct ieee80211_local *local = sdata->local;
3216         int err;
3217
3218         mutex_lock(&local->mtx);
3219         err = __ieee80211_channel_switch(wiphy, dev, params);
3220         mutex_unlock(&local->mtx);
3221
3222         return err;
3223 }
3224
3225 static struct sk_buff *ieee80211_make_ack_skb(struct ieee80211_local *local,
3226                                               struct sk_buff *skb, u64 *cookie,
3227                                               gfp_t gfp)
3228 {
3229         unsigned long spin_flags;
3230         struct sk_buff *ack_skb;
3231         int id;
3232
3233         ack_skb = skb_copy(skb, gfp);
3234         if (!ack_skb)
3235                 return ERR_PTR(-ENOMEM);
3236
3237         spin_lock_irqsave(&local->ack_status_lock, spin_flags);
3238         id = idr_alloc(&local->ack_status_frames, ack_skb,
3239                        1, 0x10000, GFP_ATOMIC);
3240         spin_unlock_irqrestore(&local->ack_status_lock, spin_flags);
3241
3242         if (id < 0) {
3243                 kfree_skb(ack_skb);
3244                 return ERR_PTR(-ENOMEM);
3245         }
3246
3247         IEEE80211_SKB_CB(skb)->ack_frame_id = id;
3248
3249         *cookie = ieee80211_mgmt_tx_cookie(local);
3250         IEEE80211_SKB_CB(ack_skb)->ack.cookie = *cookie;
3251
3252         return ack_skb;
3253 }
3254
3255 static int ieee80211_mgmt_tx(struct wiphy *wiphy, struct wireless_dev *wdev,
3256                              struct cfg80211_mgmt_tx_params *params,
3257                              u64 *cookie)
3258 {
3259         struct ieee80211_sub_if_data *sdata = IEEE80211_WDEV_TO_SUB_IF(wdev);
3260         struct ieee80211_local *local = sdata->local;
3261         struct sk_buff *skb, *ack_skb;
3262         struct sta_info *sta;
3263         const struct ieee80211_mgmt *mgmt = (void *)params->buf;
3264         bool need_offchan = false;
3265         u32 flags;
3266         int ret;
3267         u8 *data;
3268
3269         if (params->dont_wait_for_ack)
3270                 flags = IEEE80211_TX_CTL_NO_ACK;
3271         else
3272                 flags = IEEE80211_TX_INTFL_NL80211_FRAME_TX |
3273                         IEEE80211_TX_CTL_REQ_TX_STATUS;
3274
3275         if (params->no_cck)
3276                 flags |= IEEE80211_TX_CTL_NO_CCK_RATE;
3277
3278         switch (sdata->vif.type) {
3279         case NL80211_IFTYPE_ADHOC:
3280                 if (!sdata->vif.bss_conf.ibss_joined)
3281                         need_offchan = true;
3282                 /* fall through */
3283 #ifdef CONFIG_MAC80211_MESH
3284         case NL80211_IFTYPE_MESH_POINT:
3285                 if (ieee80211_vif_is_mesh(&sdata->vif) &&
3286                     !sdata->u.mesh.mesh_id_len)
3287                         need_offchan = true;
3288                 /* fall through */
3289 #endif
3290         case NL80211_IFTYPE_AP:
3291         case NL80211_IFTYPE_AP_VLAN:
3292         case NL80211_IFTYPE_P2P_GO:
3293                 if (sdata->vif.type != NL80211_IFTYPE_ADHOC &&
3294                     !ieee80211_vif_is_mesh(&sdata->vif) &&
3295                     !rcu_access_pointer(sdata->bss->beacon))
3296                         need_offchan = true;
3297                 if (!ieee80211_is_action(mgmt->frame_control) ||
3298                     mgmt->u.action.category == WLAN_CATEGORY_PUBLIC ||
3299                     mgmt->u.action.category == WLAN_CATEGORY_SELF_PROTECTED ||
3300                     mgmt->u.action.category == WLAN_CATEGORY_SPECTRUM_MGMT)
3301                         break;
3302                 rcu_read_lock();
3303                 sta = sta_info_get(sdata, mgmt->da);
3304                 rcu_read_unlock();
3305                 if (!sta)
3306                         return -ENOLINK;
3307                 break;
3308         case NL80211_IFTYPE_STATION:
3309         case NL80211_IFTYPE_P2P_CLIENT:
3310                 sdata_lock(sdata);
3311                 if (!sdata->u.mgd.associated ||
3312                     (params->offchan && params->wait &&
3313                      local->ops->remain_on_channel &&
3314                      memcmp(sdata->u.mgd.associated->bssid,
3315                             mgmt->bssid, ETH_ALEN)))
3316                         need_offchan = true;
3317                 sdata_unlock(sdata);
3318                 break;
3319         case NL80211_IFTYPE_P2P_DEVICE:
3320                 need_offchan = true;
3321                 break;
3322         default:
3323                 return -EOPNOTSUPP;
3324         }
3325
3326         /* configurations requiring offchan cannot work if no channel has been
3327          * specified
3328          */
3329         if (need_offchan && !params->chan)
3330                 return -EINVAL;
3331
3332         mutex_lock(&local->mtx);
3333
3334         /* Check if the operating channel is the requested channel */
3335         if (!need_offchan) {
3336                 struct ieee80211_chanctx_conf *chanctx_conf;
3337
3338                 rcu_read_lock();
3339                 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
3340
3341                 if (chanctx_conf) {
3342                         need_offchan = params->chan &&
3343                                        (params->chan !=
3344                                         chanctx_conf->def.chan);
3345                 } else if (!params->chan) {
3346                         ret = -EINVAL;
3347                         rcu_read_unlock();
3348                         goto out_unlock;
3349                 } else {
3350                         need_offchan = true;
3351                 }
3352                 rcu_read_unlock();
3353         }
3354
3355         if (need_offchan && !params->offchan) {
3356                 ret = -EBUSY;
3357                 goto out_unlock;
3358         }
3359
3360         skb = dev_alloc_skb(local->hw.extra_tx_headroom + params->len);
3361         if (!skb) {
3362                 ret = -ENOMEM;
3363                 goto out_unlock;
3364         }
3365         skb_reserve(skb, local->hw.extra_tx_headroom);
3366
3367         data = skb_put(skb, params->len);
3368         memcpy(data, params->buf, params->len);
3369
3370         /* Update CSA counters */
3371         if (sdata->vif.csa_active &&
3372             (sdata->vif.type == NL80211_IFTYPE_AP ||
3373              sdata->vif.type == NL80211_IFTYPE_MESH_POINT ||
3374              sdata->vif.type == NL80211_IFTYPE_ADHOC) &&
3375             params->n_csa_offsets) {
3376                 int i;
3377                 struct beacon_data *beacon = NULL;
3378
3379                 rcu_read_lock();
3380
3381                 if (sdata->vif.type == NL80211_IFTYPE_AP)
3382                         beacon = rcu_dereference(sdata->u.ap.beacon);
3383                 else if (sdata->vif.type == NL80211_IFTYPE_ADHOC)
3384                         beacon = rcu_dereference(sdata->u.ibss.presp);
3385                 else if (ieee80211_vif_is_mesh(&sdata->vif))
3386                         beacon = rcu_dereference(sdata->u.mesh.beacon);
3387
3388                 if (beacon)
3389                         for (i = 0; i < params->n_csa_offsets; i++)
3390                                 data[params->csa_offsets[i]] =
3391                                         beacon->csa_current_counter;
3392
3393                 rcu_read_unlock();
3394         }
3395
3396         IEEE80211_SKB_CB(skb)->flags = flags;
3397
3398         skb->dev = sdata->dev;
3399
3400         if (!params->dont_wait_for_ack) {
3401                 /* make a copy to preserve the frame contents
3402                  * in case of encryption.
3403                  */
3404                 ack_skb = ieee80211_make_ack_skb(local, skb, cookie,
3405                                                  GFP_KERNEL);
3406                 if (IS_ERR(ack_skb)) {
3407                         ret = PTR_ERR(ack_skb);
3408                         kfree_skb(skb);
3409                         goto out_unlock;
3410                 }
3411         } else {
3412                 /* Assign a dummy non-zero cookie, it's not sent to
3413                  * userspace in this case but we rely on its value
3414                  * internally in the need_offchan case to distinguish
3415                  * mgmt-tx from remain-on-channel.
3416                  */
3417                 *cookie = 0xffffffff;
3418         }
3419
3420         if (!need_offchan) {
3421                 ieee80211_tx_skb(sdata, skb);
3422                 ret = 0;
3423                 goto out_unlock;
3424         }
3425
3426         IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_TX_OFFCHAN |
3427                                         IEEE80211_TX_INTFL_OFFCHAN_TX_OK;
3428         if (ieee80211_hw_check(&local->hw, QUEUE_CONTROL))
3429                 IEEE80211_SKB_CB(skb)->hw_queue =
3430                         local->hw.offchannel_tx_hw_queue;
3431
3432         /* This will handle all kinds of coalescing and immediate TX */
3433         ret = ieee80211_start_roc_work(local, sdata, params->chan,
3434                                        params->wait, cookie, skb,
3435                                        IEEE80211_ROC_TYPE_MGMT_TX);
3436         if (ret)
3437                 kfree_skb(skb);
3438  out_unlock:
3439         mutex_unlock(&local->mtx);
3440         return ret;
3441 }
3442
3443 static int ieee80211_mgmt_tx_cancel_wait(struct wiphy *wiphy,
3444                                          struct wireless_dev *wdev,
3445                                          u64 cookie)
3446 {
3447         struct ieee80211_local *local = wiphy_priv(wiphy);
3448
3449         return ieee80211_cancel_roc(local, cookie, true);
3450 }
3451
3452 static void ieee80211_mgmt_frame_register(struct wiphy *wiphy,
3453                                           struct wireless_dev *wdev,
3454                                           u16 frame_type, bool reg)
3455 {
3456         struct ieee80211_local *local = wiphy_priv(wiphy);
3457         struct ieee80211_sub_if_data *sdata = IEEE80211_WDEV_TO_SUB_IF(wdev);
3458
3459         switch (frame_type) {
3460         case IEEE80211_FTYPE_MGMT | IEEE80211_STYPE_PROBE_REQ:
3461                 if (reg) {
3462                         local->probe_req_reg++;
3463                         sdata->vif.probe_req_reg++;
3464                 } else {
3465                         if (local->probe_req_reg)
3466                                 local->probe_req_reg--;
3467
3468                         if (sdata->vif.probe_req_reg)
3469                                 sdata->vif.probe_req_reg--;
3470                 }
3471
3472                 if (!local->open_count)
3473                         break;
3474
3475                 if (sdata->vif.probe_req_reg == 1)
3476                         drv_config_iface_filter(local, sdata, FIF_PROBE_REQ,
3477                                                 FIF_PROBE_REQ);
3478                 else if (sdata->vif.probe_req_reg == 0)
3479                         drv_config_iface_filter(local, sdata, 0,
3480                                                 FIF_PROBE_REQ);
3481
3482                 ieee80211_configure_filter(local);
3483                 break;
3484         default:
3485                 break;
3486         }
3487 }
3488
3489 static int ieee80211_set_antenna(struct wiphy *wiphy, u32 tx_ant, u32 rx_ant)
3490 {
3491         struct ieee80211_local *local = wiphy_priv(wiphy);
3492
3493         if (local->started)
3494                 return -EOPNOTSUPP;
3495
3496         return drv_set_antenna(local, tx_ant, rx_ant);
3497 }
3498
3499 static int ieee80211_get_antenna(struct wiphy *wiphy, u32 *tx_ant, u32 *rx_ant)
3500 {
3501         struct ieee80211_local *local = wiphy_priv(wiphy);
3502
3503         return drv_get_antenna(local, tx_ant, rx_ant);
3504 }
3505
3506 static int ieee80211_set_rekey_data(struct wiphy *wiphy,
3507                                     struct net_device *dev,
3508                                     struct cfg80211_gtk_rekey_data *data)
3509 {
3510         struct ieee80211_local *local = wiphy_priv(wiphy);
3511         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3512
3513         if (!local->ops->set_rekey_data)
3514                 return -EOPNOTSUPP;
3515
3516         drv_set_rekey_data(local, sdata, data);
3517
3518         return 0;
3519 }
3520
3521 static int ieee80211_probe_client(struct wiphy *wiphy, struct net_device *dev,
3522                                   const u8 *peer, u64 *cookie)
3523 {
3524         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3525         struct ieee80211_local *local = sdata->local;
3526         struct ieee80211_qos_hdr *nullfunc;
3527         struct sk_buff *skb, *ack_skb;
3528         int size = sizeof(*nullfunc);
3529         __le16 fc;
3530         bool qos;
3531         struct ieee80211_tx_info *info;
3532         struct sta_info *sta;
3533         struct ieee80211_chanctx_conf *chanctx_conf;
3534         enum ieee80211_band band;
3535         int ret;
3536
3537         /* the lock is needed to assign the cookie later */
3538         mutex_lock(&local->mtx);
3539
3540         rcu_read_lock();
3541         chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
3542         if (WARN_ON(!chanctx_conf)) {
3543                 ret = -EINVAL;
3544                 goto unlock;
3545         }
3546         band = chanctx_conf->def.chan->band;
3547         sta = sta_info_get_bss(sdata, peer);
3548         if (sta) {
3549                 qos = sta->sta.wme;
3550         } else {
3551                 ret = -ENOLINK;
3552                 goto unlock;
3553         }
3554
3555         if (qos) {
3556                 fc = cpu_to_le16(IEEE80211_FTYPE_DATA |
3557                                  IEEE80211_STYPE_QOS_NULLFUNC |
3558                                  IEEE80211_FCTL_FROMDS);
3559         } else {
3560                 size -= 2;
3561                 fc = cpu_to_le16(IEEE80211_FTYPE_DATA |
3562                                  IEEE80211_STYPE_NULLFUNC |
3563                                  IEEE80211_FCTL_FROMDS);
3564         }
3565
3566         skb = dev_alloc_skb(local->hw.extra_tx_headroom + size);
3567         if (!skb) {
3568                 ret = -ENOMEM;
3569                 goto unlock;
3570         }
3571
3572         skb->dev = dev;
3573
3574         skb_reserve(skb, local->hw.extra_tx_headroom);
3575
3576         nullfunc = (void *) skb_put(skb, size);
3577         nullfunc->frame_control = fc;
3578         nullfunc->duration_id = 0;
3579         memcpy(nullfunc->addr1, sta->sta.addr, ETH_ALEN);
3580         memcpy(nullfunc->addr2, sdata->vif.addr, ETH_ALEN);
3581         memcpy(nullfunc->addr3, sdata->vif.addr, ETH_ALEN);
3582         nullfunc->seq_ctrl = 0;
3583
3584         info = IEEE80211_SKB_CB(skb);
3585
3586         info->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS |
3587                        IEEE80211_TX_INTFL_NL80211_FRAME_TX;
3588         info->band = band;
3589
3590         skb_set_queue_mapping(skb, IEEE80211_AC_VO);
3591         skb->priority = 7;
3592         if (qos)
3593                 nullfunc->qos_ctrl = cpu_to_le16(7);
3594
3595         ack_skb = ieee80211_make_ack_skb(local, skb, cookie, GFP_ATOMIC);
3596         if (IS_ERR(ack_skb)) {
3597                 kfree_skb(skb);
3598                 ret = PTR_ERR(ack_skb);
3599                 goto unlock;
3600         }
3601
3602         local_bh_disable();
3603         ieee80211_xmit(sdata, sta, skb);
3604         local_bh_enable();
3605
3606         ret = 0;
3607 unlock:
3608         rcu_read_unlock();
3609         mutex_unlock(&local->mtx);
3610
3611         return ret;
3612 }
3613
3614 static int ieee80211_cfg_get_channel(struct wiphy *wiphy,
3615                                      struct wireless_dev *wdev,
3616                                      struct cfg80211_chan_def *chandef)
3617 {
3618         struct ieee80211_sub_if_data *sdata = IEEE80211_WDEV_TO_SUB_IF(wdev);
3619         struct ieee80211_local *local = wiphy_priv(wiphy);
3620         struct ieee80211_chanctx_conf *chanctx_conf;
3621         int ret = -ENODATA;
3622
3623         rcu_read_lock();
3624         chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
3625         if (chanctx_conf) {
3626                 *chandef = sdata->vif.bss_conf.chandef;
3627                 ret = 0;
3628         } else if (local->open_count > 0 &&
3629                    local->open_count == local->monitors &&
3630                    sdata->vif.type == NL80211_IFTYPE_MONITOR) {
3631                 if (local->use_chanctx)
3632                         *chandef = local->monitor_chandef;
3633                 else
3634                         *chandef = local->_oper_chandef;
3635                 ret = 0;
3636         }
3637         rcu_read_unlock();
3638
3639         return ret;
3640 }
3641
3642 #ifdef CONFIG_PM
3643 static void ieee80211_set_wakeup(struct wiphy *wiphy, bool enabled)
3644 {
3645         drv_set_wakeup(wiphy_priv(wiphy), enabled);
3646 }
3647 #endif
3648
3649 static int ieee80211_set_qos_map(struct wiphy *wiphy,
3650                                  struct net_device *dev,
3651                                  struct cfg80211_qos_map *qos_map)
3652 {
3653         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3654         struct mac80211_qos_map *new_qos_map, *old_qos_map;
3655
3656         if (qos_map) {
3657                 new_qos_map = kzalloc(sizeof(*new_qos_map), GFP_KERNEL);
3658                 if (!new_qos_map)
3659                         return -ENOMEM;
3660                 memcpy(&new_qos_map->qos_map, qos_map, sizeof(*qos_map));
3661         } else {
3662                 /* A NULL qos_map was passed to disable QoS mapping */
3663                 new_qos_map = NULL;
3664         }
3665
3666         old_qos_map = sdata_dereference(sdata->qos_map, sdata);
3667         rcu_assign_pointer(sdata->qos_map, new_qos_map);
3668         if (old_qos_map)
3669                 kfree_rcu(old_qos_map, rcu_head);
3670
3671         return 0;
3672 }
3673
3674 static int ieee80211_set_ap_chanwidth(struct wiphy *wiphy,
3675                                       struct net_device *dev,
3676                                       struct cfg80211_chan_def *chandef)
3677 {
3678         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3679         int ret;
3680         u32 changed = 0;
3681
3682         ret = ieee80211_vif_change_bandwidth(sdata, chandef, &changed);
3683         if (ret == 0)
3684                 ieee80211_bss_info_change_notify(sdata, changed);
3685
3686         return ret;
3687 }
3688
3689 static int ieee80211_add_tx_ts(struct wiphy *wiphy, struct net_device *dev,
3690                                u8 tsid, const u8 *peer, u8 up,
3691                                u16 admitted_time)
3692 {
3693         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3694         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3695         int ac = ieee802_1d_to_ac[up];
3696
3697         if (sdata->vif.type != NL80211_IFTYPE_STATION)
3698                 return -EOPNOTSUPP;
3699
3700         if (!(sdata->wmm_acm & BIT(up)))
3701                 return -EINVAL;
3702
3703         if (ifmgd->tx_tspec[ac].admitted_time)
3704                 return -EBUSY;
3705
3706         if (admitted_time) {
3707                 ifmgd->tx_tspec[ac].admitted_time = 32 * admitted_time;
3708                 ifmgd->tx_tspec[ac].tsid = tsid;
3709                 ifmgd->tx_tspec[ac].up = up;
3710         }
3711
3712         return 0;
3713 }
3714
3715 static int ieee80211_del_tx_ts(struct wiphy *wiphy, struct net_device *dev,
3716                                u8 tsid, const u8 *peer)
3717 {
3718         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3719         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3720         struct ieee80211_local *local = wiphy_priv(wiphy);
3721         int ac;
3722
3723         for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
3724                 struct ieee80211_sta_tx_tspec *tx_tspec = &ifmgd->tx_tspec[ac];
3725
3726                 /* skip unused entries */
3727                 if (!tx_tspec->admitted_time)
3728                         continue;
3729
3730                 if (tx_tspec->tsid != tsid)
3731                         continue;
3732
3733                 /* due to this new packets will be reassigned to non-ACM ACs */
3734                 tx_tspec->up = -1;
3735
3736                 /* Make sure that all packets have been sent to avoid to
3737                  * restore the QoS params on packets that are still on the
3738                  * queues.
3739                  */
3740                 synchronize_net();
3741                 ieee80211_flush_queues(local, sdata, false);
3742
3743                 /* restore the normal QoS parameters
3744                  * (unconditionally to avoid races)
3745                  */
3746                 tx_tspec->action = TX_TSPEC_ACTION_STOP_DOWNGRADE;
3747                 tx_tspec->downgraded = false;
3748                 ieee80211_sta_handle_tspec_ac_params(sdata);
3749
3750                 /* finally clear all the data */
3751                 memset(tx_tspec, 0, sizeof(*tx_tspec));
3752
3753                 return 0;
3754         }
3755
3756         return -ENOENT;
3757 }
3758
3759 const struct cfg80211_ops mac80211_config_ops = {
3760         .add_virtual_intf = ieee80211_add_iface,
3761         .del_virtual_intf = ieee80211_del_iface,
3762         .change_virtual_intf = ieee80211_change_iface,
3763         .start_p2p_device = ieee80211_start_p2p_device,
3764         .stop_p2p_device = ieee80211_stop_p2p_device,
3765         .add_key = ieee80211_add_key,
3766         .del_key = ieee80211_del_key,
3767         .get_key = ieee80211_get_key,
3768         .set_default_key = ieee80211_config_default_key,
3769         .set_default_mgmt_key = ieee80211_config_default_mgmt_key,
3770         .start_ap = ieee80211_start_ap,
3771         .change_beacon = ieee80211_change_beacon,
3772         .stop_ap = ieee80211_stop_ap,
3773         .add_station = ieee80211_add_station,
3774         .del_station = ieee80211_del_station,
3775         .change_station = ieee80211_change_station,
3776         .get_station = ieee80211_get_station,
3777         .dump_station = ieee80211_dump_station,
3778         .dump_survey = ieee80211_dump_survey,
3779 #ifdef CONFIG_MAC80211_MESH
3780         .add_mpath = ieee80211_add_mpath,
3781         .del_mpath = ieee80211_del_mpath,
3782         .change_mpath = ieee80211_change_mpath,
3783         .get_mpath = ieee80211_get_mpath,
3784         .dump_mpath = ieee80211_dump_mpath,
3785         .get_mpp = ieee80211_get_mpp,
3786         .dump_mpp = ieee80211_dump_mpp,
3787         .update_mesh_config = ieee80211_update_mesh_config,
3788         .get_mesh_config = ieee80211_get_mesh_config,
3789         .join_mesh = ieee80211_join_mesh,
3790         .leave_mesh = ieee80211_leave_mesh,
3791 #endif
3792         .join_ocb = ieee80211_join_ocb,
3793         .leave_ocb = ieee80211_leave_ocb,
3794         .change_bss = ieee80211_change_bss,
3795         .set_txq_params = ieee80211_set_txq_params,
3796         .set_monitor_channel = ieee80211_set_monitor_channel,
3797         .suspend = ieee80211_suspend,
3798         .resume = ieee80211_resume,
3799         .scan = ieee80211_scan,
3800         .sched_scan_start = ieee80211_sched_scan_start,
3801         .sched_scan_stop = ieee80211_sched_scan_stop,
3802         .auth = ieee80211_auth,
3803         .assoc = ieee80211_assoc,
3804         .deauth = ieee80211_deauth,
3805         .disassoc = ieee80211_disassoc,
3806         .join_ibss = ieee80211_join_ibss,
3807         .leave_ibss = ieee80211_leave_ibss,
3808         .set_mcast_rate = ieee80211_set_mcast_rate,
3809         .set_wiphy_params = ieee80211_set_wiphy_params,
3810         .set_tx_power = ieee80211_set_tx_power,
3811         .get_tx_power = ieee80211_get_tx_power,
3812         .set_wds_peer = ieee80211_set_wds_peer,
3813         .rfkill_poll = ieee80211_rfkill_poll,
3814         CFG80211_TESTMODE_CMD(ieee80211_testmode_cmd)
3815         CFG80211_TESTMODE_DUMP(ieee80211_testmode_dump)
3816         .set_power_mgmt = ieee80211_set_power_mgmt,
3817         .set_bitrate_mask = ieee80211_set_bitrate_mask,
3818         .remain_on_channel = ieee80211_remain_on_channel,
3819         .cancel_remain_on_channel = ieee80211_cancel_remain_on_channel,
3820         .mgmt_tx = ieee80211_mgmt_tx,
3821         .mgmt_tx_cancel_wait = ieee80211_mgmt_tx_cancel_wait,
3822         .set_cqm_rssi_config = ieee80211_set_cqm_rssi_config,
3823         .mgmt_frame_register = ieee80211_mgmt_frame_register,
3824         .set_antenna = ieee80211_set_antenna,
3825         .get_antenna = ieee80211_get_antenna,
3826         .set_rekey_data = ieee80211_set_rekey_data,
3827         .tdls_oper = ieee80211_tdls_oper,
3828         .tdls_mgmt = ieee80211_tdls_mgmt,
3829         .tdls_channel_switch = ieee80211_tdls_channel_switch,
3830         .tdls_cancel_channel_switch = ieee80211_tdls_cancel_channel_switch,
3831         .probe_client = ieee80211_probe_client,
3832         .set_noack_map = ieee80211_set_noack_map,
3833 #ifdef CONFIG_PM
3834         .set_wakeup = ieee80211_set_wakeup,
3835 #endif
3836         .get_channel = ieee80211_cfg_get_channel,
3837         .start_radar_detection = ieee80211_start_radar_detection,
3838         .channel_switch = ieee80211_channel_switch,
3839         .set_qos_map = ieee80211_set_qos_map,
3840         .set_ap_chanwidth = ieee80211_set_ap_chanwidth,
3841         .add_tx_ts = ieee80211_add_tx_ts,
3842         .del_tx_ts = ieee80211_del_tx_ts,
3843 };