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                 ieee80211_check_fast_rx_iface(sdata);
  71         } else if (type == NL80211_IFTYPE_STATION &&
  72                    params && params->use_4addr >= 0) {
  73                 sdata->u.mgd.use_4addr = params->use_4addr;
  74         }
  75
  76         if (sdata->vif.type == NL80211_IFTYPE_MONITOR && flags) {
  77                 struct ieee80211_local *local = sdata->local;
  78
  79                 if (ieee80211_sdata_running(sdata)) {
  80                         u32 mask = MONITOR_FLAG_COOK_FRAMES |
  81                                    MONITOR_FLAG_ACTIVE;
  82
  83                         /*
  84                          * Prohibit MONITOR_FLAG_COOK_FRAMES and
  85                          * MONITOR_FLAG_ACTIVE to be changed while the
  86                          * interface is up.
  87                          * Else we would need to add a lot of cruft
  88                          * to update everything:
  89                          *      cooked_mntrs, monitor and all fif_* counters
  90                          *      reconfigure hardware
  91                          */
  92                         if ((*flags & mask) != (sdata->u.mntr_flags & mask))
  93                                 return -EBUSY;
  94
  95                         ieee80211_adjust_monitor_flags(sdata, -1);
  96                         sdata->u.mntr_flags = *flags;
  97                         ieee80211_adjust_monitor_flags(sdata, 1);
  98
  99                         ieee80211_configure_filter(local);
 100                 } else {
 101                         /*
 102                          * Because the interface is down, ieee80211_do_stop
 103                          * and ieee80211_do_open take care of "everything"
 104                          * mentioned in the comment above.
 105                          */
 106                         sdata->u.mntr_flags = *flags;
 107                 }
 108         }
 109
 110         return 0;
 111 }
 112
 113 static int ieee80211_start_p2p_device(struct wiphy *wiphy,
 114                                       struct wireless_dev *wdev)
 115 {
 116         struct ieee80211_sub_if_data *sdata = IEEE80211_WDEV_TO_SUB_IF(wdev);
 117         int ret;
 118
 119         mutex_lock(&sdata->local->chanctx_mtx);
 120         ret = ieee80211_check_combinations(sdata, NULL, 0, 0);
 121         mutex_unlock(&sdata->local->chanctx_mtx);
 122         if (ret < 0)
 123                 return ret;
 124
 125         return ieee80211_do_open(wdev, true);
 126 }
 127
 128 static void ieee80211_stop_p2p_device(struct wiphy *wiphy,
 129                                       struct wireless_dev *wdev)
 130 {
 131         ieee80211_sdata_stop(IEEE80211_WDEV_TO_SUB_IF(wdev));
 132 }
 133
 134 static int ieee80211_set_noack_map(struct wiphy *wiphy,
 135                                   struct net_device *dev,
 136                                   u16 noack_map)
 137 {
 138         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 139
 140         sdata->noack_map = noack_map;
 141
 142         ieee80211_check_fast_xmit_iface(sdata);
 143
 144         return 0;
 145 }
 146
 147 static int ieee80211_add_key(struct wiphy *wiphy, struct net_device *dev,
 148                              u8 key_idx, bool pairwise, const u8 *mac_addr,
 149                              struct key_params *params)
 150 {
 151         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 152         struct ieee80211_local *local = sdata->local;
 153         struct sta_info *sta = NULL;
 154         const struct ieee80211_cipher_scheme *cs = NULL;
 155         struct ieee80211_key *key;
 156         int err;
 157
 158         if (!ieee80211_sdata_running(sdata))
 159                 return -ENETDOWN;
 160
 161         /* reject WEP and TKIP keys if WEP failed to initialize */
 162         switch (params->cipher) {
 163         case WLAN_CIPHER_SUITE_WEP40:
 164         case WLAN_CIPHER_SUITE_TKIP:
 165         case WLAN_CIPHER_SUITE_WEP104:
 166                 if (IS_ERR(local->wep_tx_tfm))
 167                         return -EINVAL;
 168                 break;
 169         case WLAN_CIPHER_SUITE_CCMP:
 170         case WLAN_CIPHER_SUITE_CCMP_256:
 171         case WLAN_CIPHER_SUITE_AES_CMAC:
 172         case WLAN_CIPHER_SUITE_BIP_CMAC_256:
 173         case WLAN_CIPHER_SUITE_BIP_GMAC_128:
 174         case WLAN_CIPHER_SUITE_BIP_GMAC_256:
 175         case WLAN_CIPHER_SUITE_GCMP:
 176         case WLAN_CIPHER_SUITE_GCMP_256:
 177                 break;
 178         default:
 179                 cs = ieee80211_cs_get(local, params->cipher, sdata->vif.type);
 180                 break;
 181         }
 182
 183         key = ieee80211_key_alloc(params->cipher, key_idx, params->key_len,
 184                                   params->key, params->seq_len, params->seq,
 185                                   cs);
 186         if (IS_ERR(key))
 187                 return PTR_ERR(key);
 188
 189         if (pairwise)
 190                 key->conf.flags |= IEEE80211_KEY_FLAG_PAIRWISE;
 191
 192         mutex_lock(&local->sta_mtx);
 193
 194         if (mac_addr) {
 195                 if (ieee80211_vif_is_mesh(&sdata->vif))
 196                         sta = sta_info_get(sdata, mac_addr);
 197                 else
 198                         sta = sta_info_get_bss(sdata, mac_addr);
 199                 /*
 200                  * The ASSOC test makes sure the driver is ready to
 201                  * receive the key. When wpa_supplicant has roamed
 202                  * using FT, it attempts to set the key before
 203                  * association has completed, this rejects that attempt
 204                  * so it will set the key again after association.
 205                  *
 206                  * TODO: accept the key if we have a station entry and
 207                  *       add it to the device after the station.
 208                  */
 209                 if (!sta || !test_sta_flag(sta, WLAN_STA_ASSOC)) {
 210                         ieee80211_key_free_unused(key);
 211                         err = -ENOENT;
 212                         goto out_unlock;
 213                 }
 214         }
 215
 216         switch (sdata->vif.type) {
 217         case NL80211_IFTYPE_STATION:
 218                 if (sdata->u.mgd.mfp != IEEE80211_MFP_DISABLED)
 219                         key->conf.flags |= IEEE80211_KEY_FLAG_RX_MGMT;
 220                 break;
 221         case NL80211_IFTYPE_AP:
 222         case NL80211_IFTYPE_AP_VLAN:
 223                 /* Keys without a station are used for TX only */
 224                 if (key->sta && test_sta_flag(key->sta, WLAN_STA_MFP))
 225                         key->conf.flags |= IEEE80211_KEY_FLAG_RX_MGMT;
 226                 break;
 227         case NL80211_IFTYPE_ADHOC:
 228                 /* no MFP (yet) */
 229                 break;
 230         case NL80211_IFTYPE_MESH_POINT:
 231 #ifdef CONFIG_MAC80211_MESH
 232                 if (sdata->u.mesh.security != IEEE80211_MESH_SEC_NONE)
 233                         key->conf.flags |= IEEE80211_KEY_FLAG_RX_MGMT;
 234                 break;
 235 #endif
 236         case NL80211_IFTYPE_WDS:
 237         case NL80211_IFTYPE_MONITOR:
 238         case NL80211_IFTYPE_P2P_DEVICE:
 239         case NL80211_IFTYPE_UNSPECIFIED:
 240         case NUM_NL80211_IFTYPES:
 241         case NL80211_IFTYPE_P2P_CLIENT:
 242         case NL80211_IFTYPE_P2P_GO:
 243         case NL80211_IFTYPE_OCB:
 244                 /* shouldn't happen */
 245                 WARN_ON_ONCE(1);
 246                 break;
 247         }
 248
 249         if (sta)
 250                 sta->cipher_scheme = cs;
 251
 252         err = ieee80211_key_link(key, sdata, sta);
 253
 254  out_unlock:
 255         mutex_unlock(&local->sta_mtx);
 256
 257         return err;
 258 }
 259
 260 static int ieee80211_del_key(struct wiphy *wiphy, struct net_device *dev,
 261                              u8 key_idx, bool pairwise, const u8 *mac_addr)
 262 {
 263         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 264         struct ieee80211_local *local = sdata->local;
 265         struct sta_info *sta;
 266         struct ieee80211_key *key = NULL;
 267         int ret;
 268
 269         mutex_lock(&local->sta_mtx);
 270         mutex_lock(&local->key_mtx);
 271
 272         if (mac_addr) {
 273                 ret = -ENOENT;
 274
 275                 sta = sta_info_get_bss(sdata, mac_addr);
 276                 if (!sta)
 277                         goto out_unlock;
 278
 279                 if (pairwise)
 280                         key = key_mtx_dereference(local, sta->ptk[key_idx]);
 281                 else
 282                         key = key_mtx_dereference(local, sta->gtk[key_idx]);
 283         } else
 284                 key = key_mtx_dereference(local, sdata->keys[key_idx]);
 285
 286         if (!key) {
 287                 ret = -ENOENT;
 288                 goto out_unlock;
 289         }
 290
 291         ieee80211_key_free(key, true);
 292
 293         ret = 0;
 294  out_unlock:
 295         mutex_unlock(&local->key_mtx);
 296         mutex_unlock(&local->sta_mtx);
 297
 298         return ret;
 299 }
 300
 301 static int ieee80211_get_key(struct wiphy *wiphy, struct net_device *dev,
 302                              u8 key_idx, bool pairwise, const u8 *mac_addr,
 303                              void *cookie,
 304                              void (*callback)(void *cookie,
 305                                               struct key_params *params))
 306 {
 307         struct ieee80211_sub_if_data *sdata;
 308         struct sta_info *sta = NULL;
 309         u8 seq[6] = {0};
 310         struct key_params params;
 311         struct ieee80211_key *key = NULL;
 312         u64 pn64;
 313         u32 iv32;
 314         u16 iv16;
 315         int err = -ENOENT;
 316         struct ieee80211_key_seq kseq = {};
 317
 318         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 319
 320         rcu_read_lock();
 321
 322         if (mac_addr) {
 323                 sta = sta_info_get_bss(sdata, mac_addr);
 324                 if (!sta)
 325                         goto out;
 326
 327                 if (pairwise && key_idx < NUM_DEFAULT_KEYS)
 328                         key = rcu_dereference(sta->ptk[key_idx]);
 329                 else if (!pairwise &&
 330                          key_idx < NUM_DEFAULT_KEYS + NUM_DEFAULT_MGMT_KEYS)
 331                         key = rcu_dereference(sta->gtk[key_idx]);
 332         } else
 333                 key = rcu_dereference(sdata->keys[key_idx]);
 334
 335         if (!key)
 336                 goto out;
 337
 338         memset(&params, 0, sizeof(params));
 339
 340         params.cipher = key->conf.cipher;
 341
 342         switch (key->conf.cipher) {
 343         case WLAN_CIPHER_SUITE_TKIP:
 344                 pn64 = atomic64_read(&key->conf.tx_pn);
 345                 iv32 = TKIP_PN_TO_IV32(pn64);
 346                 iv16 = TKIP_PN_TO_IV16(pn64);
 347
 348                 if (key->flags & KEY_FLAG_UPLOADED_TO_HARDWARE &&
 349                     !(key->conf.flags & IEEE80211_KEY_FLAG_GENERATE_IV)) {
 350                         drv_get_key_seq(sdata->local, key, &kseq);
 351                         iv32 = kseq.tkip.iv32;
 352                         iv16 = kseq.tkip.iv16;
 353                 }
 354
 355                 seq[0] = iv16 & 0xff;
 356                 seq[1] = (iv16 >> 8) & 0xff;
 357                 seq[2] = iv32 & 0xff;
 358                 seq[3] = (iv32 >> 8) & 0xff;
 359                 seq[4] = (iv32 >> 16) & 0xff;
 360                 seq[5] = (iv32 >> 24) & 0xff;
 361                 params.seq = seq;
 362                 params.seq_len = 6;
 363                 break;
 364         case WLAN_CIPHER_SUITE_CCMP:
 365         case WLAN_CIPHER_SUITE_CCMP_256:
 366         case WLAN_CIPHER_SUITE_AES_CMAC:
 367         case WLAN_CIPHER_SUITE_BIP_CMAC_256:
 368                 BUILD_BUG_ON(offsetof(typeof(kseq), ccmp) !=
 369                              offsetof(typeof(kseq), aes_cmac));
 370         case WLAN_CIPHER_SUITE_BIP_GMAC_128:
 371         case WLAN_CIPHER_SUITE_BIP_GMAC_256:
 372                 BUILD_BUG_ON(offsetof(typeof(kseq), ccmp) !=
 373                              offsetof(typeof(kseq), aes_gmac));
 374         case WLAN_CIPHER_SUITE_GCMP:
 375         case WLAN_CIPHER_SUITE_GCMP_256:
 376                 BUILD_BUG_ON(offsetof(typeof(kseq), ccmp) !=
 377                              offsetof(typeof(kseq), gcmp));
 378
 379                 if (key->flags & KEY_FLAG_UPLOADED_TO_HARDWARE &&
 380                     !(key->conf.flags & IEEE80211_KEY_FLAG_GENERATE_IV)) {
 381                         drv_get_key_seq(sdata->local, key, &kseq);
 382                         memcpy(seq, kseq.ccmp.pn, 6);
 383                 } else {
 384                         pn64 = atomic64_read(&key->conf.tx_pn);
 385                         seq[0] = pn64;
 386                         seq[1] = pn64 >> 8;
 387                         seq[2] = pn64 >> 16;
 388                         seq[3] = pn64 >> 24;
 389                         seq[4] = pn64 >> 32;
 390                         seq[5] = pn64 >> 40;
 391                 }
 392                 params.seq = seq;
 393                 params.seq_len = 6;
 394                 break;
 395         default:
 396                 if (!(key->flags & KEY_FLAG_UPLOADED_TO_HARDWARE))
 397                         break;
 398                 if (WARN_ON(key->conf.flags & IEEE80211_KEY_FLAG_GENERATE_IV))
 399                         break;
 400                 drv_get_key_seq(sdata->local, key, &kseq);
 401                 params.seq = kseq.hw.seq;
 402                 params.seq_len = kseq.hw.seq_len;
 403                 break;
 404         }
 405
 406         params.key = key->conf.key;
 407         params.key_len = key->conf.keylen;
 408
 409         callback(cookie, &params);
 410         err = 0;
 411
 412  out:
 413         rcu_read_unlock();
 414         return err;
 415 }
 416
 417 static int ieee80211_config_default_key(struct wiphy *wiphy,
 418                                         struct net_device *dev,
 419                                         u8 key_idx, bool uni,
 420                                         bool multi)
 421 {
 422         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 423
 424         ieee80211_set_default_key(sdata, key_idx, uni, multi);
 425
 426         return 0;
 427 }
 428
 429 static int ieee80211_config_default_mgmt_key(struct wiphy *wiphy,
 430                                              struct net_device *dev,
 431                                              u8 key_idx)
 432 {
 433         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 434
 435         ieee80211_set_default_mgmt_key(sdata, key_idx);
 436
 437         return 0;
 438 }
 439
 440 void sta_set_rate_info_tx(struct sta_info *sta,
 441                           const struct ieee80211_tx_rate *rate,
 442                           struct rate_info *rinfo)
 443 {
 444         rinfo->flags = 0;
 445         if (rate->flags & IEEE80211_TX_RC_MCS) {
 446                 rinfo->flags |= RATE_INFO_FLAGS_MCS;
 447                 rinfo->mcs = rate->idx;
 448         } else if (rate->flags & IEEE80211_TX_RC_VHT_MCS) {
 449                 rinfo->flags |= RATE_INFO_FLAGS_VHT_MCS;
 450                 rinfo->mcs = ieee80211_rate_get_vht_mcs(rate);
 451                 rinfo->nss = ieee80211_rate_get_vht_nss(rate);
 452         } else {
 453                 struct ieee80211_supported_band *sband;
 454                 int shift = ieee80211_vif_get_shift(&sta->sdata->vif);
 455                 u16 brate;
 456
 457                 sband = sta->local->hw.wiphy->bands[
 458                                 ieee80211_get_sdata_band(sta->sdata)];
 459                 brate = sband->bitrates[rate->idx].bitrate;
 460                 rinfo->legacy = DIV_ROUND_UP(brate, 1 << shift);
 461         }
 462         if (rate->flags & IEEE80211_TX_RC_40_MHZ_WIDTH)
 463                 rinfo->bw = RATE_INFO_BW_40;
 464         else if (rate->flags & IEEE80211_TX_RC_80_MHZ_WIDTH)
 465                 rinfo->bw = RATE_INFO_BW_80;
 466         else if (rate->flags & IEEE80211_TX_RC_160_MHZ_WIDTH)
 467                 rinfo->bw = RATE_INFO_BW_160;
 468         else
 469                 rinfo->bw = RATE_INFO_BW_20;
 470         if (rate->flags & IEEE80211_TX_RC_SHORT_GI)
 471                 rinfo->flags |= RATE_INFO_FLAGS_SHORT_GI;
 472 }
 473
 474 static int ieee80211_dump_station(struct wiphy *wiphy, struct net_device *dev,
 475                                   int idx, u8 *mac, struct station_info *sinfo)
 476 {
 477         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 478         struct ieee80211_local *local = sdata->local;
 479         struct sta_info *sta;
 480         int ret = -ENOENT;
 481
 482         mutex_lock(&local->sta_mtx);
 483
 484         sta = sta_info_get_by_idx(sdata, idx);
 485         if (sta) {
 486                 ret = 0;
 487                 memcpy(mac, sta->sta.addr, ETH_ALEN);
 488                 sta_set_sinfo(sta, sinfo);
 489         }
 490
 491         mutex_unlock(&local->sta_mtx);
 492
 493         return ret;
 494 }
 495
 496 static int ieee80211_dump_survey(struct wiphy *wiphy, struct net_device *dev,
 497                                  int idx, struct survey_info *survey)
 498 {
 499         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
 500
 501         return drv_get_survey(local, idx, survey);
 502 }
 503
 504 static int ieee80211_get_station(struct wiphy *wiphy, struct net_device *dev,
 505                                  const u8 *mac, struct station_info *sinfo)
 506 {
 507         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 508         struct ieee80211_local *local = sdata->local;
 509         struct sta_info *sta;
 510         int ret = -ENOENT;
 511
 512         mutex_lock(&local->sta_mtx);
 513
 514         sta = sta_info_get_bss(sdata, mac);
 515         if (sta) {
 516                 ret = 0;
 517                 sta_set_sinfo(sta, sinfo);
 518         }
 519
 520         mutex_unlock(&local->sta_mtx);
 521
 522         return ret;
 523 }
 524
 525 static int ieee80211_set_monitor_channel(struct wiphy *wiphy,
 526                                          struct cfg80211_chan_def *chandef)
 527 {
 528         struct ieee80211_local *local = wiphy_priv(wiphy);
 529         struct ieee80211_sub_if_data *sdata;
 530         int ret = 0;
 531
 532         if (cfg80211_chandef_identical(&local->monitor_chandef, chandef))
 533                 return 0;
 534
 535         mutex_lock(&local->mtx);
 536         mutex_lock(&local->iflist_mtx);
 537         if (local->use_chanctx) {
 538                 sdata = rcu_dereference_protected(
 539                                 local->monitor_sdata,
 540                                 lockdep_is_held(&local->iflist_mtx));
 541                 if (sdata) {
 542                         ieee80211_vif_release_channel(sdata);
 543                         ret = ieee80211_vif_use_channel(sdata, chandef,
 544                                         IEEE80211_CHANCTX_EXCLUSIVE);
 545                 }
 546         } else if (local->open_count == local->monitors) {
 547                 local->_oper_chandef = *chandef;
 548                 ieee80211_hw_config(local, 0);
 549         }
 550
 551         if (ret == 0)
 552                 local->monitor_chandef = *chandef;
 553         mutex_unlock(&local->iflist_mtx);
 554         mutex_unlock(&local->mtx);
 555
 556         return ret;
 557 }
 558
 559 static int ieee80211_set_probe_resp(struct ieee80211_sub_if_data *sdata,
 560                                     const u8 *resp, size_t resp_len,
 561                                     const struct ieee80211_csa_settings *csa)
 562 {
 563         struct probe_resp *new, *old;
 564
 565         if (!resp || !resp_len)
 566                 return 1;
 567
 568         old = sdata_dereference(sdata->u.ap.probe_resp, sdata);
 569
 570         new = kzalloc(sizeof(struct probe_resp) + resp_len, GFP_KERNEL);
 571         if (!new)
 572                 return -ENOMEM;
 573
 574         new->len = resp_len;
 575         memcpy(new->data, resp, resp_len);
 576
 577         if (csa)
 578                 memcpy(new->csa_counter_offsets, csa->counter_offsets_presp,
 579                        csa->n_counter_offsets_presp *
 580                        sizeof(new->csa_counter_offsets[0]));
 581
 582         rcu_assign_pointer(sdata->u.ap.probe_resp, new);
 583         if (old)
 584                 kfree_rcu(old, rcu_head);
 585
 586         return 0;
 587 }
 588
 589 static int ieee80211_assign_beacon(struct ieee80211_sub_if_data *sdata,
 590                                    struct cfg80211_beacon_data *params,
 591                                    const struct ieee80211_csa_settings *csa)
 592 {
 593         struct beacon_data *new, *old;
 594         int new_head_len, new_tail_len;
 595         int size, err;
 596         u32 changed = BSS_CHANGED_BEACON;
 597
 598         old = sdata_dereference(sdata->u.ap.beacon, sdata);
 599
 600
 601         /* Need to have a beacon head if we don't have one yet */
 602         if (!params->head && !old)
 603                 return -EINVAL;
 604
 605         /* new or old head? */
 606         if (params->head)
 607                 new_head_len = params->head_len;
 608         else
 609                 new_head_len = old->head_len;
 610
 611         /* new or old tail? */
 612         if (params->tail || !old)
 613                 /* params->tail_len will be zero for !params->tail */
 614                 new_tail_len = params->tail_len;
 615         else
 616                 new_tail_len = old->tail_len;
 617
 618         size = sizeof(*new) + new_head_len + new_tail_len;
 619
 620         new = kzalloc(size, GFP_KERNEL);
 621         if (!new)
 622                 return -ENOMEM;
 623
 624         /* start filling the new info now */
 625
 626         /*
 627          * pointers go into the block we allocated,
 628          * memory is | beacon_data | head | tail |
 629          */
 630         new->head = ((u8 *) new) + sizeof(*new);
 631         new->tail = new->head + new_head_len;
 632         new->head_len = new_head_len;
 633         new->tail_len = new_tail_len;
 634
 635         if (csa) {
 636                 new->csa_current_counter = csa->count;
 637                 memcpy(new->csa_counter_offsets, csa->counter_offsets_beacon,
 638                        csa->n_counter_offsets_beacon *
 639                        sizeof(new->csa_counter_offsets[0]));
 640         }
 641
 642         /* copy in head */
 643         if (params->head)
 644                 memcpy(new->head, params->head, new_head_len);
 645         else
 646                 memcpy(new->head, old->head, new_head_len);
 647
 648         /* copy in optional tail */
 649         if (params->tail)
 650                 memcpy(new->tail, params->tail, new_tail_len);
 651         else
 652                 if (old)
 653                         memcpy(new->tail, old->tail, new_tail_len);
 654
 655         err = ieee80211_set_probe_resp(sdata, params->probe_resp,
 656                                        params->probe_resp_len, csa);
 657         if (err < 0)
 658                 return err;
 659         if (err == 0)
 660                 changed |= BSS_CHANGED_AP_PROBE_RESP;
 661
 662         rcu_assign_pointer(sdata->u.ap.beacon, new);
 663
 664         if (old)
 665                 kfree_rcu(old, rcu_head);
 666
 667         return changed;
 668 }
 669
 670 static int ieee80211_start_ap(struct wiphy *wiphy, struct net_device *dev,
 671                               struct cfg80211_ap_settings *params)
 672 {
 673         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 674         struct ieee80211_local *local = sdata->local;
 675         struct beacon_data *old;
 676         struct ieee80211_sub_if_data *vlan;
 677         u32 changed = BSS_CHANGED_BEACON_INT |
 678                       BSS_CHANGED_BEACON_ENABLED |
 679                       BSS_CHANGED_BEACON |
 680                       BSS_CHANGED_SSID |
 681                       BSS_CHANGED_P2P_PS |
 682                       BSS_CHANGED_TXPOWER;
 683         int err;
 684
 685         old = sdata_dereference(sdata->u.ap.beacon, sdata);
 686         if (old)
 687                 return -EALREADY;
 688
 689         switch (params->smps_mode) {
 690         case NL80211_SMPS_OFF:
 691                 sdata->smps_mode = IEEE80211_SMPS_OFF;
 692                 break;
 693         case NL80211_SMPS_STATIC:
 694                 sdata->smps_mode = IEEE80211_SMPS_STATIC;
 695                 break;
 696         case NL80211_SMPS_DYNAMIC:
 697                 sdata->smps_mode = IEEE80211_SMPS_DYNAMIC;
 698                 break;
 699         default:
 700                 return -EINVAL;
 701         }
 702         sdata->needed_rx_chains = sdata->local->rx_chains;
 703
 704         mutex_lock(&local->mtx);
 705         err = ieee80211_vif_use_channel(sdata, &params->chandef,
 706                                         IEEE80211_CHANCTX_SHARED);
 707         if (!err)
 708                 ieee80211_vif_copy_chanctx_to_vlans(sdata, false);
 709         mutex_unlock(&local->mtx);
 710         if (err)
 711                 return err;
 712
 713         /*
 714          * Apply control port protocol, this allows us to
 715          * not encrypt dynamic WEP control frames.
 716          */
 717         sdata->control_port_protocol = params->crypto.control_port_ethertype;
 718         sdata->control_port_no_encrypt = params->crypto.control_port_no_encrypt;
 719         sdata->encrypt_headroom = ieee80211_cs_headroom(sdata->local,
 720                                                         &params->crypto,
 721                                                         sdata->vif.type);
 722
 723         list_for_each_entry(vlan, &sdata->u.ap.vlans, u.vlan.list) {
 724                 vlan->control_port_protocol =
 725                         params->crypto.control_port_ethertype;
 726                 vlan->control_port_no_encrypt =
 727                         params->crypto.control_port_no_encrypt;
 728                 vlan->encrypt_headroom =
 729                         ieee80211_cs_headroom(sdata->local,
 730                                               &params->crypto,
 731                                               vlan->vif.type);
 732         }
 733
 734         sdata->vif.bss_conf.beacon_int = params->beacon_interval;
 735         sdata->vif.bss_conf.dtim_period = params->dtim_period;
 736         sdata->vif.bss_conf.enable_beacon = true;
 737         sdata->vif.bss_conf.allow_p2p_go_ps = sdata->vif.p2p;
 738
 739         sdata->vif.bss_conf.ssid_len = params->ssid_len;
 740         if (params->ssid_len)
 741                 memcpy(sdata->vif.bss_conf.ssid, params->ssid,
 742                        params->ssid_len);
 743         sdata->vif.bss_conf.hidden_ssid =
 744                 (params->hidden_ssid != NL80211_HIDDEN_SSID_NOT_IN_USE);
 745
 746         memset(&sdata->vif.bss_conf.p2p_noa_attr, 0,
 747                sizeof(sdata->vif.bss_conf.p2p_noa_attr));
 748         sdata->vif.bss_conf.p2p_noa_attr.oppps_ctwindow =
 749                 params->p2p_ctwindow & IEEE80211_P2P_OPPPS_CTWINDOW_MASK;
 750         if (params->p2p_opp_ps)
 751                 sdata->vif.bss_conf.p2p_noa_attr.oppps_ctwindow |=
 752                                         IEEE80211_P2P_OPPPS_ENABLE_BIT;
 753
 754         err = ieee80211_assign_beacon(sdata, &params->beacon, NULL);
 755         if (err < 0) {
 756                 ieee80211_vif_release_channel(sdata);
 757                 return err;
 758         }
 759         changed |= err;
 760
 761         err = drv_start_ap(sdata->local, sdata);
 762         if (err) {
 763                 old = sdata_dereference(sdata->u.ap.beacon, sdata);
 764
 765                 if (old)
 766                         kfree_rcu(old, rcu_head);
 767                 RCU_INIT_POINTER(sdata->u.ap.beacon, NULL);
 768                 ieee80211_vif_release_channel(sdata);
 769                 return err;
 770         }
 771
 772         ieee80211_recalc_dtim(local, sdata);
 773         ieee80211_bss_info_change_notify(sdata, changed);
 774
 775         netif_carrier_on(dev);
 776         list_for_each_entry(vlan, &sdata->u.ap.vlans, u.vlan.list)
 777                 netif_carrier_on(vlan->dev);
 778
 779         return 0;
 780 }
 781
 782 static int ieee80211_change_beacon(struct wiphy *wiphy, struct net_device *dev,
 783                                    struct cfg80211_beacon_data *params)
 784 {
 785         struct ieee80211_sub_if_data *sdata;
 786         struct beacon_data *old;
 787         int err;
 788
 789         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 790         sdata_assert_lock(sdata);
 791
 792         /* don't allow changing the beacon while CSA is in place - offset
 793          * of channel switch counter may change
 794          */
 795         if (sdata->vif.csa_active)
 796                 return -EBUSY;
 797
 798         old = sdata_dereference(sdata->u.ap.beacon, sdata);
 799         if (!old)
 800                 return -ENOENT;
 801
 802         err = ieee80211_assign_beacon(sdata, params, NULL);
 803         if (err < 0)
 804                 return err;
 805         ieee80211_bss_info_change_notify(sdata, err);
 806         return 0;
 807 }
 808
 809 static int ieee80211_stop_ap(struct wiphy *wiphy, struct net_device *dev)
 810 {
 811         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 812         struct ieee80211_sub_if_data *vlan;
 813         struct ieee80211_local *local = sdata->local;
 814         struct beacon_data *old_beacon;
 815         struct probe_resp *old_probe_resp;
 816         struct cfg80211_chan_def chandef;
 817
 818         sdata_assert_lock(sdata);
 819
 820         old_beacon = sdata_dereference(sdata->u.ap.beacon, sdata);
 821         if (!old_beacon)
 822                 return -ENOENT;
 823         old_probe_resp = sdata_dereference(sdata->u.ap.probe_resp, sdata);
 824
 825         /* abort any running channel switch */
 826         mutex_lock(&local->mtx);
 827         sdata->vif.csa_active = false;
 828         if (sdata->csa_block_tx) {
 829                 ieee80211_wake_vif_queues(local, sdata,
 830                                           IEEE80211_QUEUE_STOP_REASON_CSA);
 831                 sdata->csa_block_tx = false;
 832         }
 833
 834         mutex_unlock(&local->mtx);
 835
 836         kfree(sdata->u.ap.next_beacon);
 837         sdata->u.ap.next_beacon = NULL;
 838
 839         /* turn off carrier for this interface and dependent VLANs */
 840         list_for_each_entry(vlan, &sdata->u.ap.vlans, u.vlan.list)
 841                 netif_carrier_off(vlan->dev);
 842         netif_carrier_off(dev);
 843
 844         /* remove beacon and probe response */
 845         RCU_INIT_POINTER(sdata->u.ap.beacon, NULL);
 846         RCU_INIT_POINTER(sdata->u.ap.probe_resp, NULL);
 847         kfree_rcu(old_beacon, rcu_head);
 848         if (old_probe_resp)
 849                 kfree_rcu(old_probe_resp, rcu_head);
 850         sdata->u.ap.driver_smps_mode = IEEE80211_SMPS_OFF;
 851
 852         __sta_info_flush(sdata, true);
 853         ieee80211_free_keys(sdata, true);
 854
 855         sdata->vif.bss_conf.enable_beacon = false;
 856         sdata->vif.bss_conf.ssid_len = 0;
 857         clear_bit(SDATA_STATE_OFFCHANNEL_BEACON_STOPPED, &sdata->state);
 858         ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BEACON_ENABLED);
 859
 860         if (sdata->wdev.cac_started) {
 861                 chandef = sdata->vif.bss_conf.chandef;
 862                 cancel_delayed_work_sync(&sdata->dfs_cac_timer_work);
 863                 cfg80211_cac_event(sdata->dev, &chandef,
 864                                    NL80211_RADAR_CAC_ABORTED,
 865                                    GFP_KERNEL);
 866         }
 867
 868         drv_stop_ap(sdata->local, sdata);
 869
 870         /* free all potentially still buffered bcast frames */
 871         local->total_ps_buffered -= skb_queue_len(&sdata->u.ap.ps.bc_buf);
 872         skb_queue_purge(&sdata->u.ap.ps.bc_buf);
 873
 874         mutex_lock(&local->mtx);
 875         ieee80211_vif_copy_chanctx_to_vlans(sdata, true);
 876         ieee80211_vif_release_channel(sdata);
 877         mutex_unlock(&local->mtx);
 878
 879         return 0;
 880 }
 881
 882 /* Layer 2 Update frame (802.2 Type 1 LLC XID Update response) */
 883 struct iapp_layer2_update {
 884         u8 da[ETH_ALEN];        /* broadcast */
 885         u8 sa[ETH_ALEN];        /* STA addr */
 886         __be16 len;             /* 6 */
 887         u8 dsap;                /* 0 */
 888         u8 ssap;                /* 0 */
 889         u8 control;
 890         u8 xid_info[3];
 891 } __packed;
 892
 893 static void ieee80211_send_layer2_update(struct sta_info *sta)
 894 {
 895         struct iapp_layer2_update *msg;
 896         struct sk_buff *skb;
 897
 898         /* Send Level 2 Update Frame to update forwarding tables in layer 2
 899          * bridge devices */
 900
 901         skb = dev_alloc_skb(sizeof(*msg));
 902         if (!skb)
 903                 return;
 904         msg = (struct iapp_layer2_update *)skb_put(skb, sizeof(*msg));
 905
 906         /* 802.2 Type 1 Logical Link Control (LLC) Exchange Identifier (XID)
 907          * Update response frame; IEEE Std 802.2-1998, 5.4.1.2.1 */
 908
 909         eth_broadcast_addr(msg->da);
 910         memcpy(msg->sa, sta->sta.addr, ETH_ALEN);
 911         msg->len = htons(6);
 912         msg->dsap = 0;
 913         msg->ssap = 0x01;       /* NULL LSAP, CR Bit: Response */
 914         msg->control = 0xaf;    /* XID response lsb.1111F101.
 915                                  * F=0 (no poll command; unsolicited frame) */
 916         msg->xid_info[0] = 0x81;        /* XID format identifier */
 917         msg->xid_info[1] = 1;   /* LLC types/classes: Type 1 LLC */
 918         msg->xid_info[2] = 0;   /* XID sender's receive window size (RW) */
 919
 920         skb->dev = sta->sdata->dev;
 921         skb->protocol = eth_type_trans(skb, sta->sdata->dev);
 922         memset(skb->cb, 0, sizeof(skb->cb));
 923         netif_rx_ni(skb);
 924 }
 925
 926 static int sta_apply_auth_flags(struct ieee80211_local *local,
 927                                 struct sta_info *sta,
 928                                 u32 mask, u32 set)
 929 {
 930         int ret;
 931
 932         if (mask & BIT(NL80211_STA_FLAG_AUTHENTICATED) &&
 933             set & BIT(NL80211_STA_FLAG_AUTHENTICATED) &&
 934             !test_sta_flag(sta, WLAN_STA_AUTH)) {
 935                 ret = sta_info_move_state(sta, IEEE80211_STA_AUTH);
 936                 if (ret)
 937                         return ret;
 938         }
 939
 940         if (mask & BIT(NL80211_STA_FLAG_ASSOCIATED) &&
 941             set & BIT(NL80211_STA_FLAG_ASSOCIATED) &&
 942             !test_sta_flag(sta, WLAN_STA_ASSOC)) {
 943                 /*
 944                  * When peer becomes associated, init rate control as
 945                  * well. Some drivers require rate control initialized
 946                  * before drv_sta_state() is called.
 947                  */
 948                 if (!test_sta_flag(sta, WLAN_STA_RATE_CONTROL))
 949                         rate_control_rate_init(sta);
 950
 951                 ret = sta_info_move_state(sta, IEEE80211_STA_ASSOC);
 952                 if (ret)
 953                         return ret;
 954         }
 955
 956         if (mask & BIT(NL80211_STA_FLAG_AUTHORIZED)) {
 957                 if (set & BIT(NL80211_STA_FLAG_AUTHORIZED))
 958                         ret = sta_info_move_state(sta, IEEE80211_STA_AUTHORIZED);
 959                 else if (test_sta_flag(sta, WLAN_STA_AUTHORIZED))
 960                         ret = sta_info_move_state(sta, IEEE80211_STA_ASSOC);
 961                 else
 962                         ret = 0;
 963                 if (ret)
 964                         return ret;
 965         }
 966
 967         if (mask & BIT(NL80211_STA_FLAG_ASSOCIATED) &&
 968             !(set & BIT(NL80211_STA_FLAG_ASSOCIATED)) &&
 969             test_sta_flag(sta, WLAN_STA_ASSOC)) {
 970                 ret = sta_info_move_state(sta, IEEE80211_STA_AUTH);
 971                 if (ret)
 972                         return ret;
 973         }
 974
 975         if (mask & BIT(NL80211_STA_FLAG_AUTHENTICATED) &&
 976             !(set & BIT(NL80211_STA_FLAG_AUTHENTICATED)) &&
 977             test_sta_flag(sta, WLAN_STA_AUTH)) {
 978                 ret = sta_info_move_state(sta, IEEE80211_STA_NONE);
 979                 if (ret)
 980                         return ret;
 981         }
 982
 983         return 0;
 984 }
 985
 986 static void sta_apply_mesh_params(struct ieee80211_local *local,
 987                                   struct sta_info *sta,
 988                                   struct station_parameters *params)
 989 {
 990 #ifdef CONFIG_MAC80211_MESH
 991         struct ieee80211_sub_if_data *sdata = sta->sdata;
 992         u32 changed = 0;
 993
 994         if (params->sta_modify_mask & STATION_PARAM_APPLY_PLINK_STATE) {
 995                 switch (params->plink_state) {
 996                 case NL80211_PLINK_ESTAB:
 997                         if (sta->mesh->plink_state != NL80211_PLINK_ESTAB)
 998                                 changed = mesh_plink_inc_estab_count(sdata);
 999                         sta->mesh->plink_state = params->plink_state;
1000                         sta->mesh->aid = params->peer_aid;
1001
1002                         ieee80211_mps_sta_status_update(sta);
1003                         changed |= ieee80211_mps_set_sta_local_pm(sta,
1004                                       sdata->u.mesh.mshcfg.power_mode);
1005                         break;
1006                 case NL80211_PLINK_LISTEN:
1007                 case NL80211_PLINK_BLOCKED:
1008                 case NL80211_PLINK_OPN_SNT:
1009                 case NL80211_PLINK_OPN_RCVD:
1010                 case NL80211_PLINK_CNF_RCVD:
1011                 case NL80211_PLINK_HOLDING:
1012                         if (sta->mesh->plink_state == NL80211_PLINK_ESTAB)
1013                                 changed = mesh_plink_dec_estab_count(sdata);
1014                         sta->mesh->plink_state = params->plink_state;
1015
1016                         ieee80211_mps_sta_status_update(sta);
1017                         changed |= ieee80211_mps_set_sta_local_pm(sta,
1018                                         NL80211_MESH_POWER_UNKNOWN);
1019                         break;
1020                 default:
1021                         /*  nothing  */
1022                         break;
1023                 }
1024         }
1025
1026         switch (params->plink_action) {
1027         case NL80211_PLINK_ACTION_NO_ACTION:
1028                 /* nothing */
1029                 break;
1030         case NL80211_PLINK_ACTION_OPEN:
1031                 changed |= mesh_plink_open(sta);
1032                 break;
1033         case NL80211_PLINK_ACTION_BLOCK:
1034                 changed |= mesh_plink_block(sta);
1035                 break;
1036         }
1037
1038         if (params->local_pm)
1039                 changed |= ieee80211_mps_set_sta_local_pm(sta,
1040                                                           params->local_pm);
1041
1042         ieee80211_mbss_info_change_notify(sdata, changed);
1043 #endif
1044 }
1045
1046 static int sta_apply_parameters(struct ieee80211_local *local,
1047                                 struct sta_info *sta,
1048                                 struct station_parameters *params)
1049 {
1050         int ret = 0;
1051         struct ieee80211_supported_band *sband;
1052         struct ieee80211_sub_if_data *sdata = sta->sdata;
1053         enum nl80211_band band = ieee80211_get_sdata_band(sdata);
1054         u32 mask, set;
1055
1056         sband = local->hw.wiphy->bands[band];
1057
1058         mask = params->sta_flags_mask;
1059         set = params->sta_flags_set;
1060
1061         if (ieee80211_vif_is_mesh(&sdata->vif)) {
1062                 /*
1063                  * In mesh mode, ASSOCIATED isn't part of the nl80211
1064                  * API but must follow AUTHENTICATED for driver state.
1065                  */
1066                 if (mask & BIT(NL80211_STA_FLAG_AUTHENTICATED))
1067                         mask |= BIT(NL80211_STA_FLAG_ASSOCIATED);
1068                 if (set & BIT(NL80211_STA_FLAG_AUTHENTICATED))
1069                         set |= BIT(NL80211_STA_FLAG_ASSOCIATED);
1070         } else if (test_sta_flag(sta, WLAN_STA_TDLS_PEER)) {
1071                 /*
1072                  * TDLS -- everything follows authorized, but
1073                  * only becoming authorized is possible, not
1074                  * going back
1075                  */
1076                 if (set & BIT(NL80211_STA_FLAG_AUTHORIZED)) {
1077                         set |= BIT(NL80211_STA_FLAG_AUTHENTICATED) |
1078                                BIT(NL80211_STA_FLAG_ASSOCIATED);
1079                         mask |= BIT(NL80211_STA_FLAG_AUTHENTICATED) |
1080                                 BIT(NL80211_STA_FLAG_ASSOCIATED);
1081                 }
1082         }
1083
1084         if (mask & BIT(NL80211_STA_FLAG_WME) &&
1085             local->hw.queues >= IEEE80211_NUM_ACS)
1086                 sta->sta.wme = set & BIT(NL80211_STA_FLAG_WME);
1087
1088         /* auth flags will be set later for TDLS,
1089          * and for unassociated stations that move to assocaited */
1090         if (!test_sta_flag(sta, WLAN_STA_TDLS_PEER) &&
1091             !((mask & BIT(NL80211_STA_FLAG_ASSOCIATED)) &&
1092               (set & BIT(NL80211_STA_FLAG_ASSOCIATED)))) {
1093                 ret = sta_apply_auth_flags(local, sta, mask, set);
1094                 if (ret)
1095                         return ret;
1096         }
1097
1098         if (mask & BIT(NL80211_STA_FLAG_SHORT_PREAMBLE)) {
1099                 if (set & BIT(NL80211_STA_FLAG_SHORT_PREAMBLE))
1100                         set_sta_flag(sta, WLAN_STA_SHORT_PREAMBLE);
1101                 else
1102                         clear_sta_flag(sta, WLAN_STA_SHORT_PREAMBLE);
1103         }
1104
1105         if (mask & BIT(NL80211_STA_FLAG_MFP)) {
1106                 sta->sta.mfp = !!(set & BIT(NL80211_STA_FLAG_MFP));
1107                 if (set & BIT(NL80211_STA_FLAG_MFP))
1108                         set_sta_flag(sta, WLAN_STA_MFP);
1109                 else
1110                         clear_sta_flag(sta, WLAN_STA_MFP);
1111         }
1112
1113         if (mask & BIT(NL80211_STA_FLAG_TDLS_PEER)) {
1114                 if (set & BIT(NL80211_STA_FLAG_TDLS_PEER))
1115                         set_sta_flag(sta, WLAN_STA_TDLS_PEER);
1116                 else
1117                         clear_sta_flag(sta, WLAN_STA_TDLS_PEER);
1118         }
1119
1120         /* mark TDLS channel switch support, if the AP allows it */
1121         if (test_sta_flag(sta, WLAN_STA_TDLS_PEER) &&
1122             !sdata->u.mgd.tdls_chan_switch_prohibited &&
1123             params->ext_capab_len >= 4 &&
1124             params->ext_capab[3] & WLAN_EXT_CAPA4_TDLS_CHAN_SWITCH)
1125                 set_sta_flag(sta, WLAN_STA_TDLS_CHAN_SWITCH);
1126
1127         if (test_sta_flag(sta, WLAN_STA_TDLS_PEER) &&
1128             !sdata->u.mgd.tdls_wider_bw_prohibited &&
1129             ieee80211_hw_check(&local->hw, TDLS_WIDER_BW) &&
1130             params->ext_capab_len >= 8 &&
1131             params->ext_capab[7] & WLAN_EXT_CAPA8_TDLS_WIDE_BW_ENABLED)
1132                 set_sta_flag(sta, WLAN_STA_TDLS_WIDER_BW);
1133
1134         if (params->sta_modify_mask & STATION_PARAM_APPLY_UAPSD) {
1135                 sta->sta.uapsd_queues = params->uapsd_queues;
1136                 sta->sta.max_sp = params->max_sp;
1137         }
1138
1139         /* The sender might not have sent the last bit, consider it to be 0 */
1140         if (params->ext_capab_len >= 8) {
1141                 u8 val = (params->ext_capab[7] &
1142                           WLAN_EXT_CAPA8_MAX_MSDU_IN_AMSDU_LSB) >> 7;
1143
1144                 /* we did get all the bits, take the MSB as well */
1145                 if (params->ext_capab_len >= 9) {
1146                         u8 val_msb = params->ext_capab[8] &
1147                                 WLAN_EXT_CAPA9_MAX_MSDU_IN_AMSDU_MSB;
1148                         val_msb <<= 1;
1149                         val |= val_msb;
1150                 }
1151
1152                 switch (val) {
1153                 case 1:
1154                         sta->sta.max_amsdu_subframes = 32;
1155                         break;
1156                 case 2:
1157                         sta->sta.max_amsdu_subframes = 16;
1158                         break;
1159                 case 3:
1160                         sta->sta.max_amsdu_subframes = 8;
1161                         break;
1162                 default:
1163                         sta->sta.max_amsdu_subframes = 0;
1164                 }
1165         }
1166
1167         /*
1168          * cfg80211 validates this (1-2007) and allows setting the AID
1169          * only when creating a new station entry
1170          */
1171         if (params->aid)
1172                 sta->sta.aid = params->aid;
1173
1174         /*
1175          * Some of the following updates would be racy if called on an
1176          * existing station, via ieee80211_change_station(). However,
1177          * all such changes are rejected by cfg80211 except for updates
1178          * changing the supported rates on an existing but not yet used
1179          * TDLS peer.
1180          */
1181
1182         if (params->listen_interval >= 0)
1183                 sta->listen_interval = params->listen_interval;
1184
1185         if (params->supported_rates) {
1186                 ieee80211_parse_bitrates(&sdata->vif.bss_conf.chandef,
1187                                          sband, params->supported_rates,
1188                                          params->supported_rates_len,
1189                                          &sta->sta.supp_rates[band]);
1190         }
1191
1192         if (params->ht_capa)
1193                 ieee80211_ht_cap_ie_to_sta_ht_cap(sdata, sband,
1194                                                   params->ht_capa, sta);
1195
1196         /* VHT can override some HT caps such as the A-MSDU max length */
1197         if (params->vht_capa)
1198                 ieee80211_vht_cap_ie_to_sta_vht_cap(sdata, sband,
1199                                                     params->vht_capa, sta);
1200
1201         if (params->opmode_notif_used) {
1202                 /* returned value is only needed for rc update, but the
1203                  * rc isn't initialized here yet, so ignore it
1204                  */
1205                 __ieee80211_vht_handle_opmode(sdata, sta,
1206                                               params->opmode_notif, band);
1207         }
1208
1209         if (params->support_p2p_ps >= 0)
1210                 sta->sta.support_p2p_ps = params->support_p2p_ps;
1211
1212         if (ieee80211_vif_is_mesh(&sdata->vif))
1213                 sta_apply_mesh_params(local, sta, params);
1214
1215         /* set the STA state after all sta info from usermode has been set */
1216         if (test_sta_flag(sta, WLAN_STA_TDLS_PEER) ||
1217             set & BIT(NL80211_STA_FLAG_ASSOCIATED)) {
1218                 ret = sta_apply_auth_flags(local, sta, mask, set);
1219                 if (ret)
1220                         return ret;
1221         }
1222
1223         return 0;
1224 }
1225
1226 static int ieee80211_add_station(struct wiphy *wiphy, struct net_device *dev,
1227                                  const u8 *mac,
1228                                  struct station_parameters *params)
1229 {
1230         struct ieee80211_local *local = wiphy_priv(wiphy);
1231         struct sta_info *sta;
1232         struct ieee80211_sub_if_data *sdata;
1233         int err;
1234         int layer2_update;
1235
1236         if (params->vlan) {
1237                 sdata = IEEE80211_DEV_TO_SUB_IF(params->vlan);
1238
1239                 if (sdata->vif.type != NL80211_IFTYPE_AP_VLAN &&
1240                     sdata->vif.type != NL80211_IFTYPE_AP)
1241                         return -EINVAL;
1242         } else
1243                 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1244
1245         if (ether_addr_equal(mac, sdata->vif.addr))
1246                 return -EINVAL;
1247
1248         if (is_multicast_ether_addr(mac))
1249                 return -EINVAL;
1250
1251         sta = sta_info_alloc(sdata, mac, GFP_KERNEL);
1252         if (!sta)
1253                 return -ENOMEM;
1254
1255         if (params->sta_flags_set & BIT(NL80211_STA_FLAG_TDLS_PEER))
1256                 sta->sta.tdls = true;
1257
1258         err = sta_apply_parameters(local, sta, params);
1259         if (err) {
1260                 sta_info_free(local, sta);
1261                 return err;
1262         }
1263
1264         /*
1265          * for TDLS and for unassociated station, rate control should be
1266          * initialized only when rates are known and station is marked
1267          * authorized/associated
1268          */
1269         if (!test_sta_flag(sta, WLAN_STA_TDLS_PEER) &&
1270             test_sta_flag(sta, WLAN_STA_ASSOC))
1271                 rate_control_rate_init(sta);
1272
1273         layer2_update = sdata->vif.type == NL80211_IFTYPE_AP_VLAN ||
1274                 sdata->vif.type == NL80211_IFTYPE_AP;
1275
1276         err = sta_info_insert_rcu(sta);
1277         if (err) {
1278                 rcu_read_unlock();
1279                 return err;
1280         }
1281
1282         if (layer2_update)
1283                 ieee80211_send_layer2_update(sta);
1284
1285         rcu_read_unlock();
1286
1287         return 0;
1288 }
1289
1290 static int ieee80211_del_station(struct wiphy *wiphy, struct net_device *dev,
1291                                  struct station_del_parameters *params)
1292 {
1293         struct ieee80211_sub_if_data *sdata;
1294
1295         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1296
1297         if (params->mac)
1298                 return sta_info_destroy_addr_bss(sdata, params->mac);
1299
1300         sta_info_flush(sdata);
1301         return 0;
1302 }
1303
1304 static int ieee80211_change_station(struct wiphy *wiphy,
1305                                     struct net_device *dev, const u8 *mac,
1306                                     struct station_parameters *params)
1307 {
1308         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1309         struct ieee80211_local *local = wiphy_priv(wiphy);
1310         struct sta_info *sta;
1311         struct ieee80211_sub_if_data *vlansdata;
1312         enum cfg80211_station_type statype;
1313         int err;
1314
1315         mutex_lock(&local->sta_mtx);
1316
1317         sta = sta_info_get_bss(sdata, mac);
1318         if (!sta) {
1319                 err = -ENOENT;
1320                 goto out_err;
1321         }
1322
1323         switch (sdata->vif.type) {
1324         case NL80211_IFTYPE_MESH_POINT:
1325                 if (sdata->u.mesh.user_mpm)
1326                         statype = CFG80211_STA_MESH_PEER_USER;
1327                 else
1328                         statype = CFG80211_STA_MESH_PEER_KERNEL;
1329                 break;
1330         case NL80211_IFTYPE_ADHOC:
1331                 statype = CFG80211_STA_IBSS;
1332                 break;
1333         case NL80211_IFTYPE_STATION:
1334                 if (!test_sta_flag(sta, WLAN_STA_TDLS_PEER)) {
1335                         statype = CFG80211_STA_AP_STA;
1336                         break;
1337                 }
1338                 if (test_sta_flag(sta, WLAN_STA_AUTHORIZED))
1339                         statype = CFG80211_STA_TDLS_PEER_ACTIVE;
1340                 else
1341                         statype = CFG80211_STA_TDLS_PEER_SETUP;
1342                 break;
1343         case NL80211_IFTYPE_AP:
1344         case NL80211_IFTYPE_AP_VLAN:
1345                 if (test_sta_flag(sta, WLAN_STA_ASSOC))
1346                         statype = CFG80211_STA_AP_CLIENT;
1347                 else
1348                         statype = CFG80211_STA_AP_CLIENT_UNASSOC;
1349                 break;
1350         default:
1351                 err = -EOPNOTSUPP;
1352                 goto out_err;
1353         }
1354
1355         err = cfg80211_check_station_change(wiphy, params, statype);
1356         if (err)
1357                 goto out_err;
1358
1359         if (params->vlan && params->vlan != sta->sdata->dev) {
1360                 bool prev_4addr = false;
1361                 bool new_4addr = false;
1362
1363                 vlansdata = IEEE80211_DEV_TO_SUB_IF(params->vlan);
1364
1365                 if (params->vlan->ieee80211_ptr->use_4addr) {
1366                         if (vlansdata->u.vlan.sta) {
1367                                 err = -EBUSY;
1368                                 goto out_err;
1369                         }
1370
1371                         rcu_assign_pointer(vlansdata->u.vlan.sta, sta);
1372                         new_4addr = true;
1373                         __ieee80211_check_fast_rx_iface(vlansdata);
1374                 }
1375
1376                 if (sta->sdata->vif.type == NL80211_IFTYPE_AP_VLAN &&
1377                     sta->sdata->u.vlan.sta) {
1378                         RCU_INIT_POINTER(sta->sdata->u.vlan.sta, NULL);
1379                         prev_4addr = true;
1380                 }
1381
1382                 sta->sdata = vlansdata;
1383                 ieee80211_check_fast_xmit(sta);
1384
1385                 if (sta->sta_state == IEEE80211_STA_AUTHORIZED &&
1386                     prev_4addr != new_4addr) {
1387                         if (new_4addr)
1388                                 atomic_dec(&sta->sdata->bss->num_mcast_sta);
1389                         else
1390                                 atomic_inc(&sta->sdata->bss->num_mcast_sta);
1391                 }
1392
1393                 ieee80211_send_layer2_update(sta);
1394         }
1395
1396         err = sta_apply_parameters(local, sta, params);
1397         if (err)
1398                 goto out_err;
1399
1400         mutex_unlock(&local->sta_mtx);
1401
1402         if ((sdata->vif.type == NL80211_IFTYPE_AP ||
1403              sdata->vif.type == NL80211_IFTYPE_AP_VLAN) &&
1404             sta->known_smps_mode != sta->sdata->bss->req_smps &&
1405             test_sta_flag(sta, WLAN_STA_AUTHORIZED) &&
1406             sta_info_tx_streams(sta) != 1) {
1407                 ht_dbg(sta->sdata,
1408                        "%pM just authorized and MIMO capable - update SMPS\n",
1409                        sta->sta.addr);
1410                 ieee80211_send_smps_action(sta->sdata,
1411                         sta->sdata->bss->req_smps,
1412                         sta->sta.addr,
1413                         sta->sdata->vif.bss_conf.bssid);
1414         }
1415
1416         if (sdata->vif.type == NL80211_IFTYPE_STATION &&
1417             params->sta_flags_mask & BIT(NL80211_STA_FLAG_AUTHORIZED)) {
1418                 ieee80211_recalc_ps(local);
1419                 ieee80211_recalc_ps_vif(sdata);
1420         }
1421
1422         return 0;
1423 out_err:
1424         mutex_unlock(&local->sta_mtx);
1425         return err;
1426 }
1427
1428 #ifdef CONFIG_MAC80211_MESH
1429 static int ieee80211_add_mpath(struct wiphy *wiphy, struct net_device *dev,
1430                                const u8 *dst, const u8 *next_hop)
1431 {
1432         struct ieee80211_sub_if_data *sdata;
1433         struct mesh_path *mpath;
1434         struct sta_info *sta;
1435
1436         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1437
1438         rcu_read_lock();
1439         sta = sta_info_get(sdata, next_hop);
1440         if (!sta) {
1441                 rcu_read_unlock();
1442                 return -ENOENT;
1443         }
1444
1445         mpath = mesh_path_add(sdata, dst);
1446         if (IS_ERR(mpath)) {
1447                 rcu_read_unlock();
1448                 return PTR_ERR(mpath);
1449         }
1450
1451         mesh_path_fix_nexthop(mpath, sta);
1452
1453         rcu_read_unlock();
1454         return 0;
1455 }
1456
1457 static int ieee80211_del_mpath(struct wiphy *wiphy, struct net_device *dev,
1458                                const u8 *dst)
1459 {
1460         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1461
1462         if (dst)
1463                 return mesh_path_del(sdata, dst);
1464
1465         mesh_path_flush_by_iface(sdata);
1466         return 0;
1467 }
1468
1469 static int ieee80211_change_mpath(struct wiphy *wiphy, struct net_device *dev,
1470                                   const u8 *dst, const u8 *next_hop)
1471 {
1472         struct ieee80211_sub_if_data *sdata;
1473         struct mesh_path *mpath;
1474         struct sta_info *sta;
1475
1476         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1477
1478         rcu_read_lock();
1479
1480         sta = sta_info_get(sdata, next_hop);
1481         if (!sta) {
1482                 rcu_read_unlock();
1483                 return -ENOENT;
1484         }
1485
1486         mpath = mesh_path_lookup(sdata, dst);
1487         if (!mpath) {
1488                 rcu_read_unlock();
1489                 return -ENOENT;
1490         }
1491
1492         mesh_path_fix_nexthop(mpath, sta);
1493
1494         rcu_read_unlock();
1495         return 0;
1496 }
1497
1498 static void mpath_set_pinfo(struct mesh_path *mpath, u8 *next_hop,
1499                             struct mpath_info *pinfo)
1500 {
1501         struct sta_info *next_hop_sta = rcu_dereference(mpath->next_hop);
1502
1503         if (next_hop_sta)
1504                 memcpy(next_hop, next_hop_sta->sta.addr, ETH_ALEN);
1505         else
1506                 eth_zero_addr(next_hop);
1507
1508         memset(pinfo, 0, sizeof(*pinfo));
1509
1510         pinfo->generation = mpath->sdata->u.mesh.mesh_paths_generation;
1511
1512         pinfo->filled = MPATH_INFO_FRAME_QLEN |
1513                         MPATH_INFO_SN |
1514                         MPATH_INFO_METRIC |
1515                         MPATH_INFO_EXPTIME |
1516                         MPATH_INFO_DISCOVERY_TIMEOUT |
1517                         MPATH_INFO_DISCOVERY_RETRIES |
1518                         MPATH_INFO_FLAGS;
1519
1520         pinfo->frame_qlen = mpath->frame_queue.qlen;
1521         pinfo->sn = mpath->sn;
1522         pinfo->metric = mpath->metric;
1523         if (time_before(jiffies, mpath->exp_time))
1524                 pinfo->exptime = jiffies_to_msecs(mpath->exp_time - jiffies);
1525         pinfo->discovery_timeout =
1526                         jiffies_to_msecs(mpath->discovery_timeout);
1527         pinfo->discovery_retries = mpath->discovery_retries;
1528         if (mpath->flags & MESH_PATH_ACTIVE)
1529                 pinfo->flags |= NL80211_MPATH_FLAG_ACTIVE;
1530         if (mpath->flags & MESH_PATH_RESOLVING)
1531                 pinfo->flags |= NL80211_MPATH_FLAG_RESOLVING;
1532         if (mpath->flags & MESH_PATH_SN_VALID)
1533                 pinfo->flags |= NL80211_MPATH_FLAG_SN_VALID;
1534         if (mpath->flags & MESH_PATH_FIXED)
1535                 pinfo->flags |= NL80211_MPATH_FLAG_FIXED;
1536         if (mpath->flags & MESH_PATH_RESOLVED)
1537                 pinfo->flags |= NL80211_MPATH_FLAG_RESOLVED;
1538 }
1539
1540 static int ieee80211_get_mpath(struct wiphy *wiphy, struct net_device *dev,
1541                                u8 *dst, u8 *next_hop, struct mpath_info *pinfo)
1542
1543 {
1544         struct ieee80211_sub_if_data *sdata;
1545         struct mesh_path *mpath;
1546
1547         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1548
1549         rcu_read_lock();
1550         mpath = mesh_path_lookup(sdata, dst);
1551         if (!mpath) {
1552                 rcu_read_unlock();
1553                 return -ENOENT;
1554         }
1555         memcpy(dst, mpath->dst, ETH_ALEN);
1556         mpath_set_pinfo(mpath, next_hop, pinfo);
1557         rcu_read_unlock();
1558         return 0;
1559 }
1560
1561 static int ieee80211_dump_mpath(struct wiphy *wiphy, struct net_device *dev,
1562                                 int idx, u8 *dst, u8 *next_hop,
1563                                 struct mpath_info *pinfo)
1564 {
1565         struct ieee80211_sub_if_data *sdata;
1566         struct mesh_path *mpath;
1567
1568         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1569
1570         rcu_read_lock();
1571         mpath = mesh_path_lookup_by_idx(sdata, idx);
1572         if (!mpath) {
1573                 rcu_read_unlock();
1574                 return -ENOENT;
1575         }
1576         memcpy(dst, mpath->dst, ETH_ALEN);
1577         mpath_set_pinfo(mpath, next_hop, pinfo);
1578         rcu_read_unlock();
1579         return 0;
1580 }
1581
1582 static void mpp_set_pinfo(struct mesh_path *mpath, u8 *mpp,
1583                           struct mpath_info *pinfo)
1584 {
1585         memset(pinfo, 0, sizeof(*pinfo));
1586         memcpy(mpp, mpath->mpp, ETH_ALEN);
1587
1588         pinfo->generation = mpath->sdata->u.mesh.mpp_paths_generation;
1589 }
1590
1591 static int ieee80211_get_mpp(struct wiphy *wiphy, struct net_device *dev,
1592                              u8 *dst, u8 *mpp, struct mpath_info *pinfo)
1593
1594 {
1595         struct ieee80211_sub_if_data *sdata;
1596         struct mesh_path *mpath;
1597
1598         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1599
1600         rcu_read_lock();
1601         mpath = mpp_path_lookup(sdata, dst);
1602         if (!mpath) {
1603                 rcu_read_unlock();
1604                 return -ENOENT;
1605         }
1606         memcpy(dst, mpath->dst, ETH_ALEN);
1607         mpp_set_pinfo(mpath, mpp, pinfo);
1608         rcu_read_unlock();
1609         return 0;
1610 }
1611
1612 static int ieee80211_dump_mpp(struct wiphy *wiphy, struct net_device *dev,
1613                               int idx, u8 *dst, u8 *mpp,
1614                               struct mpath_info *pinfo)
1615 {
1616         struct ieee80211_sub_if_data *sdata;
1617         struct mesh_path *mpath;
1618
1619         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1620
1621         rcu_read_lock();
1622         mpath = mpp_path_lookup_by_idx(sdata, idx);
1623         if (!mpath) {
1624                 rcu_read_unlock();
1625                 return -ENOENT;
1626         }
1627         memcpy(dst, mpath->dst, ETH_ALEN);
1628         mpp_set_pinfo(mpath, mpp, pinfo);
1629         rcu_read_unlock();
1630         return 0;
1631 }
1632
1633 static int ieee80211_get_mesh_config(struct wiphy *wiphy,
1634                                 struct net_device *dev,
1635                                 struct mesh_config *conf)
1636 {
1637         struct ieee80211_sub_if_data *sdata;
1638         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1639
1640         memcpy(conf, &(sdata->u.mesh.mshcfg), sizeof(struct mesh_config));
1641         return 0;
1642 }
1643
1644 static inline bool _chg_mesh_attr(enum nl80211_meshconf_params parm, u32 mask)
1645 {
1646         return (mask >> (parm-1)) & 0x1;
1647 }
1648
1649 static int copy_mesh_setup(struct ieee80211_if_mesh *ifmsh,
1650                 const struct mesh_setup *setup)
1651 {
1652         u8 *new_ie;
1653         const u8 *old_ie;
1654         struct ieee80211_sub_if_data *sdata = container_of(ifmsh,
1655                                         struct ieee80211_sub_if_data, u.mesh);
1656
1657         /* allocate information elements */
1658         new_ie = NULL;
1659         old_ie = ifmsh->ie;
1660
1661         if (setup->ie_len) {
1662                 new_ie = kmemdup(setup->ie, setup->ie_len,
1663                                 GFP_KERNEL);
1664                 if (!new_ie)
1665                         return -ENOMEM;
1666         }
1667         ifmsh->ie_len = setup->ie_len;
1668         ifmsh->ie = new_ie;
1669         kfree(old_ie);
1670
1671         /* now copy the rest of the setup parameters */
1672         ifmsh->mesh_id_len = setup->mesh_id_len;
1673         memcpy(ifmsh->mesh_id, setup->mesh_id, ifmsh->mesh_id_len);
1674         ifmsh->mesh_sp_id = setup->sync_method;
1675         ifmsh->mesh_pp_id = setup->path_sel_proto;
1676         ifmsh->mesh_pm_id = setup->path_metric;
1677         ifmsh->user_mpm = setup->user_mpm;
1678         ifmsh->mesh_auth_id = setup->auth_id;
1679         ifmsh->security = IEEE80211_MESH_SEC_NONE;
1680         if (setup->is_authenticated)
1681                 ifmsh->security |= IEEE80211_MESH_SEC_AUTHED;
1682         if (setup->is_secure)
1683                 ifmsh->security |= IEEE80211_MESH_SEC_SECURED;
1684
1685         /* mcast rate setting in Mesh Node */
1686         memcpy(sdata->vif.bss_conf.mcast_rate, setup->mcast_rate,
1687                                                 sizeof(setup->mcast_rate));
1688         sdata->vif.bss_conf.basic_rates = setup->basic_rates;
1689
1690         sdata->vif.bss_conf.beacon_int = setup->beacon_interval;
1691         sdata->vif.bss_conf.dtim_period = setup->dtim_period;
1692
1693         return 0;
1694 }
1695
1696 static int ieee80211_update_mesh_config(struct wiphy *wiphy,
1697                                         struct net_device *dev, u32 mask,
1698                                         const struct mesh_config *nconf)
1699 {
1700         struct mesh_config *conf;
1701         struct ieee80211_sub_if_data *sdata;
1702         struct ieee80211_if_mesh *ifmsh;
1703
1704         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1705         ifmsh = &sdata->u.mesh;
1706
1707         /* Set the config options which we are interested in setting */
1708         conf = &(sdata->u.mesh.mshcfg);
1709         if (_chg_mesh_attr(NL80211_MESHCONF_RETRY_TIMEOUT, mask))
1710                 conf->dot11MeshRetryTimeout = nconf->dot11MeshRetryTimeout;
1711         if (_chg_mesh_attr(NL80211_MESHCONF_CONFIRM_TIMEOUT, mask))
1712                 conf->dot11MeshConfirmTimeout = nconf->dot11MeshConfirmTimeout;
1713         if (_chg_mesh_attr(NL80211_MESHCONF_HOLDING_TIMEOUT, mask))
1714                 conf->dot11MeshHoldingTimeout = nconf->dot11MeshHoldingTimeout;
1715         if (_chg_mesh_attr(NL80211_MESHCONF_MAX_PEER_LINKS, mask))
1716                 conf->dot11MeshMaxPeerLinks = nconf->dot11MeshMaxPeerLinks;
1717         if (_chg_mesh_attr(NL80211_MESHCONF_MAX_RETRIES, mask))
1718                 conf->dot11MeshMaxRetries = nconf->dot11MeshMaxRetries;
1719         if (_chg_mesh_attr(NL80211_MESHCONF_TTL, mask))
1720                 conf->dot11MeshTTL = nconf->dot11MeshTTL;
1721         if (_chg_mesh_attr(NL80211_MESHCONF_ELEMENT_TTL, mask))
1722                 conf->element_ttl = nconf->element_ttl;
1723         if (_chg_mesh_attr(NL80211_MESHCONF_AUTO_OPEN_PLINKS, mask)) {
1724                 if (ifmsh->user_mpm)
1725                         return -EBUSY;
1726                 conf->auto_open_plinks = nconf->auto_open_plinks;
1727         }
1728         if (_chg_mesh_attr(NL80211_MESHCONF_SYNC_OFFSET_MAX_NEIGHBOR, mask))
1729                 conf->dot11MeshNbrOffsetMaxNeighbor =
1730                         nconf->dot11MeshNbrOffsetMaxNeighbor;
1731         if (_chg_mesh_attr(NL80211_MESHCONF_HWMP_MAX_PREQ_RETRIES, mask))
1732                 conf->dot11MeshHWMPmaxPREQretries =
1733                         nconf->dot11MeshHWMPmaxPREQretries;
1734         if (_chg_mesh_attr(NL80211_MESHCONF_PATH_REFRESH_TIME, mask))
1735                 conf->path_refresh_time = nconf->path_refresh_time;
1736         if (_chg_mesh_attr(NL80211_MESHCONF_MIN_DISCOVERY_TIMEOUT, mask))
1737                 conf->min_discovery_timeout = nconf->min_discovery_timeout;
1738         if (_chg_mesh_attr(NL80211_MESHCONF_HWMP_ACTIVE_PATH_TIMEOUT, mask))
1739                 conf->dot11MeshHWMPactivePathTimeout =
1740                         nconf->dot11MeshHWMPactivePathTimeout;
1741         if (_chg_mesh_attr(NL80211_MESHCONF_HWMP_PREQ_MIN_INTERVAL, mask))
1742                 conf->dot11MeshHWMPpreqMinInterval =
1743                         nconf->dot11MeshHWMPpreqMinInterval;
1744         if (_chg_mesh_attr(NL80211_MESHCONF_HWMP_PERR_MIN_INTERVAL, mask))
1745                 conf->dot11MeshHWMPperrMinInterval =
1746                         nconf->dot11MeshHWMPperrMinInterval;
1747         if (_chg_mesh_attr(NL80211_MESHCONF_HWMP_NET_DIAM_TRVS_TIME,
1748                            mask))
1749                 conf->dot11MeshHWMPnetDiameterTraversalTime =
1750                         nconf->dot11MeshHWMPnetDiameterTraversalTime;
1751         if (_chg_mesh_attr(NL80211_MESHCONF_HWMP_ROOTMODE, mask)) {
1752                 conf->dot11MeshHWMPRootMode = nconf->dot11MeshHWMPRootMode;
1753                 ieee80211_mesh_root_setup(ifmsh);
1754         }
1755         if (_chg_mesh_attr(NL80211_MESHCONF_GATE_ANNOUNCEMENTS, mask)) {
1756                 /* our current gate announcement implementation rides on root
1757                  * announcements, so require this ifmsh to also be a root node
1758                  * */
1759                 if (nconf->dot11MeshGateAnnouncementProtocol &&
1760                     !(conf->dot11MeshHWMPRootMode > IEEE80211_ROOTMODE_ROOT)) {
1761                         conf->dot11MeshHWMPRootMode = IEEE80211_PROACTIVE_RANN;
1762                         ieee80211_mesh_root_setup(ifmsh);
1763                 }
1764                 conf->dot11MeshGateAnnouncementProtocol =
1765                         nconf->dot11MeshGateAnnouncementProtocol;
1766         }
1767         if (_chg_mesh_attr(NL80211_MESHCONF_HWMP_RANN_INTERVAL, mask))
1768                 conf->dot11MeshHWMPRannInterval =
1769                         nconf->dot11MeshHWMPRannInterval;
1770         if (_chg_mesh_attr(NL80211_MESHCONF_FORWARDING, mask))
1771                 conf->dot11MeshForwarding = nconf->dot11MeshForwarding;
1772         if (_chg_mesh_attr(NL80211_MESHCONF_RSSI_THRESHOLD, mask)) {
1773                 /* our RSSI threshold implementation is supported only for
1774                  * devices that report signal in dBm.
1775                  */
1776                 if (!ieee80211_hw_check(&sdata->local->hw, SIGNAL_DBM))
1777                         return -ENOTSUPP;
1778                 conf->rssi_threshold = nconf->rssi_threshold;
1779         }
1780         if (_chg_mesh_attr(NL80211_MESHCONF_HT_OPMODE, mask)) {
1781                 conf->ht_opmode = nconf->ht_opmode;
1782                 sdata->vif.bss_conf.ht_operation_mode = nconf->ht_opmode;
1783                 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_HT);
1784         }
1785         if (_chg_mesh_attr(NL80211_MESHCONF_HWMP_PATH_TO_ROOT_TIMEOUT, mask))
1786                 conf->dot11MeshHWMPactivePathToRootTimeout =
1787                         nconf->dot11MeshHWMPactivePathToRootTimeout;
1788         if (_chg_mesh_attr(NL80211_MESHCONF_HWMP_ROOT_INTERVAL, mask))
1789                 conf->dot11MeshHWMProotInterval =
1790                         nconf->dot11MeshHWMProotInterval;
1791         if (_chg_mesh_attr(NL80211_MESHCONF_HWMP_CONFIRMATION_INTERVAL, mask))
1792                 conf->dot11MeshHWMPconfirmationInterval =
1793                         nconf->dot11MeshHWMPconfirmationInterval;
1794         if (_chg_mesh_attr(NL80211_MESHCONF_POWER_MODE, mask)) {
1795                 conf->power_mode = nconf->power_mode;
1796                 ieee80211_mps_local_status_update(sdata);
1797         }
1798         if (_chg_mesh_attr(NL80211_MESHCONF_AWAKE_WINDOW, mask))
1799                 conf->dot11MeshAwakeWindowDuration =
1800                         nconf->dot11MeshAwakeWindowDuration;
1801         if (_chg_mesh_attr(NL80211_MESHCONF_PLINK_TIMEOUT, mask))
1802                 conf->plink_timeout = nconf->plink_timeout;
1803         ieee80211_mbss_info_change_notify(sdata, BSS_CHANGED_BEACON);
1804         return 0;
1805 }
1806
1807 static int ieee80211_join_mesh(struct wiphy *wiphy, struct net_device *dev,
1808                                const struct mesh_config *conf,
1809                                const struct mesh_setup *setup)
1810 {
1811         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1812         struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
1813         int err;
1814
1815         memcpy(&ifmsh->mshcfg, conf, sizeof(struct mesh_config));
1816         err = copy_mesh_setup(ifmsh, setup);
1817         if (err)
1818                 return err;
1819
1820         /* can mesh use other SMPS modes? */
1821         sdata->smps_mode = IEEE80211_SMPS_OFF;
1822         sdata->needed_rx_chains = sdata->local->rx_chains;
1823
1824         mutex_lock(&sdata->local->mtx);
1825         err = ieee80211_vif_use_channel(sdata, &setup->chandef,
1826                                         IEEE80211_CHANCTX_SHARED);
1827         mutex_unlock(&sdata->local->mtx);
1828         if (err)
1829                 return err;
1830
1831         return ieee80211_start_mesh(sdata);
1832 }
1833
1834 static int ieee80211_leave_mesh(struct wiphy *wiphy, struct net_device *dev)
1835 {
1836         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1837
1838         ieee80211_stop_mesh(sdata);
1839         mutex_lock(&sdata->local->mtx);
1840         ieee80211_vif_release_channel(sdata);
1841         mutex_unlock(&sdata->local->mtx);
1842
1843         return 0;
1844 }
1845 #endif
1846
1847 static int ieee80211_change_bss(struct wiphy *wiphy,
1848                                 struct net_device *dev,
1849                                 struct bss_parameters *params)
1850 {
1851         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1852         enum nl80211_band band;
1853         u32 changed = 0;
1854
1855         if (!sdata_dereference(sdata->u.ap.beacon, sdata))
1856                 return -ENOENT;
1857
1858         band = ieee80211_get_sdata_band(sdata);
1859
1860         if (params->use_cts_prot >= 0) {
1861                 sdata->vif.bss_conf.use_cts_prot = params->use_cts_prot;
1862                 changed |= BSS_CHANGED_ERP_CTS_PROT;
1863         }
1864         if (params->use_short_preamble >= 0) {
1865                 sdata->vif.bss_conf.use_short_preamble =
1866                         params->use_short_preamble;
1867                 changed |= BSS_CHANGED_ERP_PREAMBLE;
1868         }
1869
1870         if (!sdata->vif.bss_conf.use_short_slot &&
1871             band == NL80211_BAND_5GHZ) {
1872                 sdata->vif.bss_conf.use_short_slot = true;
1873                 changed |= BSS_CHANGED_ERP_SLOT;
1874         }
1875
1876         if (params->use_short_slot_time >= 0) {
1877                 sdata->vif.bss_conf.use_short_slot =
1878                         params->use_short_slot_time;
1879                 changed |= BSS_CHANGED_ERP_SLOT;
1880         }
1881
1882         if (params->basic_rates) {
1883                 ieee80211_parse_bitrates(&sdata->vif.bss_conf.chandef,
1884                                          wiphy->bands[band],
1885                                          params->basic_rates,
1886                                          params->basic_rates_len,
1887                                          &sdata->vif.bss_conf.basic_rates);
1888                 changed |= BSS_CHANGED_BASIC_RATES;
1889         }
1890
1891         if (params->ap_isolate >= 0) {
1892                 if (params->ap_isolate)
1893                         sdata->flags |= IEEE80211_SDATA_DONT_BRIDGE_PACKETS;
1894                 else
1895                         sdata->flags &= ~IEEE80211_SDATA_DONT_BRIDGE_PACKETS;
1896                 ieee80211_check_fast_rx_iface(sdata);
1897         }
1898
1899         if (params->ht_opmode >= 0) {
1900                 sdata->vif.bss_conf.ht_operation_mode =
1901                         (u16) params->ht_opmode;
1902                 changed |= BSS_CHANGED_HT;
1903         }
1904
1905         if (params->p2p_ctwindow >= 0) {
1906                 sdata->vif.bss_conf.p2p_noa_attr.oppps_ctwindow &=
1907                                         ~IEEE80211_P2P_OPPPS_CTWINDOW_MASK;
1908                 sdata->vif.bss_conf.p2p_noa_attr.oppps_ctwindow |=
1909                         params->p2p_ctwindow & IEEE80211_P2P_OPPPS_CTWINDOW_MASK;
1910                 changed |= BSS_CHANGED_P2P_PS;
1911         }
1912
1913         if (params->p2p_opp_ps > 0) {
1914                 sdata->vif.bss_conf.p2p_noa_attr.oppps_ctwindow |=
1915                                         IEEE80211_P2P_OPPPS_ENABLE_BIT;
1916                 changed |= BSS_CHANGED_P2P_PS;
1917         } else if (params->p2p_opp_ps == 0) {
1918                 sdata->vif.bss_conf.p2p_noa_attr.oppps_ctwindow &=
1919                                         ~IEEE80211_P2P_OPPPS_ENABLE_BIT;
1920                 changed |= BSS_CHANGED_P2P_PS;
1921         }
1922
1923         ieee80211_bss_info_change_notify(sdata, changed);
1924
1925         return 0;
1926 }
1927
1928 static int ieee80211_set_txq_params(struct wiphy *wiphy,
1929                                     struct net_device *dev,
1930                                     struct ieee80211_txq_params *params)
1931 {
1932         struct ieee80211_local *local = wiphy_priv(wiphy);
1933         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1934         struct ieee80211_tx_queue_params p;
1935
1936         if (!local->ops->conf_tx)
1937                 return -EOPNOTSUPP;
1938
1939         if (local->hw.queues < IEEE80211_NUM_ACS)
1940                 return -EOPNOTSUPP;
1941
1942         memset(&p, 0, sizeof(p));
1943         p.aifs = params->aifs;
1944         p.cw_max = params->cwmax;
1945         p.cw_min = params->cwmin;
1946         p.txop = params->txop;
1947
1948         /*
1949          * Setting tx queue params disables u-apsd because it's only
1950          * called in master mode.
1951          */
1952         p.uapsd = false;
1953
1954         sdata->tx_conf[params->ac] = p;
1955         if (drv_conf_tx(local, sdata, params->ac, &p)) {
1956                 wiphy_debug(local->hw.wiphy,
1957                             "failed to set TX queue parameters for AC %d\n",
1958                             params->ac);
1959                 return -EINVAL;
1960         }
1961
1962         ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_QOS);
1963
1964         return 0;
1965 }
1966
1967 #ifdef CONFIG_PM
1968 static int ieee80211_suspend(struct wiphy *wiphy,
1969                              struct cfg80211_wowlan *wowlan)
1970 {
1971         return __ieee80211_suspend(wiphy_priv(wiphy), wowlan);
1972 }
1973
1974 static int ieee80211_resume(struct wiphy *wiphy)
1975 {
1976         return __ieee80211_resume(wiphy_priv(wiphy));
1977 }
1978 #else
1979 #define ieee80211_suspend NULL
1980 #define ieee80211_resume NULL
1981 #endif
1982
1983 static int ieee80211_scan(struct wiphy *wiphy,
1984                           struct cfg80211_scan_request *req)
1985 {
1986         struct ieee80211_sub_if_data *sdata;
1987
1988         sdata = IEEE80211_WDEV_TO_SUB_IF(req->wdev);
1989
1990         switch (ieee80211_vif_type_p2p(&sdata->vif)) {
1991         case NL80211_IFTYPE_STATION:
1992         case NL80211_IFTYPE_ADHOC:
1993         case NL80211_IFTYPE_MESH_POINT:
1994         case NL80211_IFTYPE_P2P_CLIENT:
1995         case NL80211_IFTYPE_P2P_DEVICE:
1996                 break;
1997         case NL80211_IFTYPE_P2P_GO:
1998                 if (sdata->local->ops->hw_scan)
1999                         break;
2000                 /*
2001                  * FIXME: implement NoA while scanning in software,
2002                  * for now fall through to allow scanning only when
2003                  * beaconing hasn't been configured yet
2004                  */
2005         case NL80211_IFTYPE_AP:
2006                 /*
2007                  * If the scan has been forced (and the driver supports
2008                  * forcing), don't care about being beaconing already.
2009                  * This will create problems to the attached stations (e.g. all
2010                  * the  frames sent while scanning on other channel will be
2011                  * lost)
2012                  */
2013                 if (sdata->u.ap.beacon &&
2014                     (!(wiphy->features & NL80211_FEATURE_AP_SCAN) ||
2015                      !(req->flags & NL80211_SCAN_FLAG_AP)))
2016                         return -EOPNOTSUPP;
2017                 break;
2018         default:
2019                 return -EOPNOTSUPP;
2020         }
2021
2022         return ieee80211_request_scan(sdata, req);
2023 }
2024
2025 static void ieee80211_abort_scan(struct wiphy *wiphy, struct wireless_dev *wdev)
2026 {
2027         ieee80211_scan_cancel(wiphy_priv(wiphy));
2028 }
2029
2030 static int
2031 ieee80211_sched_scan_start(struct wiphy *wiphy,
2032                            struct net_device *dev,
2033                            struct cfg80211_sched_scan_request *req)
2034 {
2035         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2036
2037         if (!sdata->local->ops->sched_scan_start)
2038                 return -EOPNOTSUPP;
2039
2040         return ieee80211_request_sched_scan_start(sdata, req);
2041 }
2042
2043 static int
2044 ieee80211_sched_scan_stop(struct wiphy *wiphy, struct net_device *dev)
2045 {
2046         struct ieee80211_local *local = wiphy_priv(wiphy);
2047
2048         if (!local->ops->sched_scan_stop)
2049                 return -EOPNOTSUPP;
2050
2051         return ieee80211_request_sched_scan_stop(local);
2052 }
2053
2054 static int ieee80211_auth(struct wiphy *wiphy, struct net_device *dev,
2055                           struct cfg80211_auth_request *req)
2056 {
2057         return ieee80211_mgd_auth(IEEE80211_DEV_TO_SUB_IF(dev), req);
2058 }
2059
2060 static int ieee80211_assoc(struct wiphy *wiphy, struct net_device *dev,
2061                            struct cfg80211_assoc_request *req)
2062 {
2063         return ieee80211_mgd_assoc(IEEE80211_DEV_TO_SUB_IF(dev), req);
2064 }
2065
2066 static int ieee80211_deauth(struct wiphy *wiphy, struct net_device *dev,
2067                             struct cfg80211_deauth_request *req)
2068 {
2069         return ieee80211_mgd_deauth(IEEE80211_DEV_TO_SUB_IF(dev), req);
2070 }
2071
2072 static int ieee80211_disassoc(struct wiphy *wiphy, struct net_device *dev,
2073                               struct cfg80211_disassoc_request *req)
2074 {
2075         return ieee80211_mgd_disassoc(IEEE80211_DEV_TO_SUB_IF(dev), req);
2076 }
2077
2078 static int ieee80211_join_ibss(struct wiphy *wiphy, struct net_device *dev,
2079                                struct cfg80211_ibss_params *params)
2080 {
2081         return ieee80211_ibss_join(IEEE80211_DEV_TO_SUB_IF(dev), params);
2082 }
2083
2084 static int ieee80211_leave_ibss(struct wiphy *wiphy, struct net_device *dev)
2085 {
2086         return ieee80211_ibss_leave(IEEE80211_DEV_TO_SUB_IF(dev));
2087 }
2088
2089 static int ieee80211_join_ocb(struct wiphy *wiphy, struct net_device *dev,
2090                               struct ocb_setup *setup)
2091 {
2092         return ieee80211_ocb_join(IEEE80211_DEV_TO_SUB_IF(dev), setup);
2093 }
2094
2095 static int ieee80211_leave_ocb(struct wiphy *wiphy, struct net_device *dev)
2096 {
2097         return ieee80211_ocb_leave(IEEE80211_DEV_TO_SUB_IF(dev));
2098 }
2099
2100 static int ieee80211_set_mcast_rate(struct wiphy *wiphy, struct net_device *dev,
2101                                     int rate[NUM_NL80211_BANDS])
2102 {
2103         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2104
2105         memcpy(sdata->vif.bss_conf.mcast_rate, rate,
2106                sizeof(int) * NUM_NL80211_BANDS);
2107
2108         return 0;
2109 }
2110
2111 static int ieee80211_set_wiphy_params(struct wiphy *wiphy, u32 changed)
2112 {
2113         struct ieee80211_local *local = wiphy_priv(wiphy);
2114         int err;
2115
2116         if (changed & WIPHY_PARAM_FRAG_THRESHOLD) {
2117                 ieee80211_check_fast_xmit_all(local);
2118
2119                 err = drv_set_frag_threshold(local, wiphy->frag_threshold);
2120
2121                 if (err) {
2122                         ieee80211_check_fast_xmit_all(local);
2123                         return err;
2124                 }
2125         }
2126
2127         if ((changed & WIPHY_PARAM_COVERAGE_CLASS) ||
2128             (changed & WIPHY_PARAM_DYN_ACK)) {
2129                 s16 coverage_class;
2130
2131                 coverage_class = changed & WIPHY_PARAM_COVERAGE_CLASS ?
2132                                         wiphy->coverage_class : -1;
2133                 err = drv_set_coverage_class(local, coverage_class);
2134
2135                 if (err)
2136                         return err;
2137         }
2138
2139         if (changed & WIPHY_PARAM_RTS_THRESHOLD) {
2140                 err = drv_set_rts_threshold(local, wiphy->rts_threshold);
2141
2142                 if (err)
2143                         return err;
2144         }
2145
2146         if (changed & WIPHY_PARAM_RETRY_SHORT) {
2147                 if (wiphy->retry_short > IEEE80211_MAX_TX_RETRY)
2148                         return -EINVAL;
2149                 local->hw.conf.short_frame_max_tx_count = wiphy->retry_short;
2150         }
2151         if (changed & WIPHY_PARAM_RETRY_LONG) {
2152                 if (wiphy->retry_long > IEEE80211_MAX_TX_RETRY)
2153                         return -EINVAL;
2154                 local->hw.conf.long_frame_max_tx_count = wiphy->retry_long;
2155         }
2156         if (changed &
2157             (WIPHY_PARAM_RETRY_SHORT | WIPHY_PARAM_RETRY_LONG))
2158                 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_RETRY_LIMITS);
2159
2160         return 0;
2161 }
2162
2163 static int ieee80211_set_tx_power(struct wiphy *wiphy,
2164                                   struct wireless_dev *wdev,
2165                                   enum nl80211_tx_power_setting type, int mbm)
2166 {
2167         struct ieee80211_local *local = wiphy_priv(wiphy);
2168         struct ieee80211_sub_if_data *sdata;
2169         enum nl80211_tx_power_setting txp_type = type;
2170         bool update_txp_type = false;
2171
2172         if (wdev) {
2173                 sdata = IEEE80211_WDEV_TO_SUB_IF(wdev);
2174
2175                 switch (type) {
2176                 case NL80211_TX_POWER_AUTOMATIC:
2177                         sdata->user_power_level = IEEE80211_UNSET_POWER_LEVEL;
2178                         txp_type = NL80211_TX_POWER_LIMITED;
2179                         break;
2180                 case NL80211_TX_POWER_LIMITED:
2181                 case NL80211_TX_POWER_FIXED:
2182                         if (mbm < 0 || (mbm % 100))
2183                                 return -EOPNOTSUPP;
2184                         sdata->user_power_level = MBM_TO_DBM(mbm);
2185                         break;
2186                 }
2187
2188                 if (txp_type != sdata->vif.bss_conf.txpower_type) {
2189                         update_txp_type = true;
2190                         sdata->vif.bss_conf.txpower_type = txp_type;
2191                 }
2192
2193                 ieee80211_recalc_txpower(sdata, update_txp_type);
2194
2195                 return 0;
2196         }
2197
2198         switch (type) {
2199         case NL80211_TX_POWER_AUTOMATIC:
2200                 local->user_power_level = IEEE80211_UNSET_POWER_LEVEL;
2201                 txp_type = NL80211_TX_POWER_LIMITED;
2202                 break;
2203         case NL80211_TX_POWER_LIMITED:
2204         case NL80211_TX_POWER_FIXED:
2205                 if (mbm < 0 || (mbm % 100))
2206                         return -EOPNOTSUPP;
2207                 local->user_power_level = MBM_TO_DBM(mbm);
2208                 break;
2209         }
2210
2211         mutex_lock(&local->iflist_mtx);
2212         list_for_each_entry(sdata, &local->interfaces, list) {
2213                 sdata->user_power_level = local->user_power_level;
2214                 if (txp_type != sdata->vif.bss_conf.txpower_type)
2215                         update_txp_type = true;
2216                 sdata->vif.bss_conf.txpower_type = txp_type;
2217         }
2218         list_for_each_entry(sdata, &local->interfaces, list)
2219                 ieee80211_recalc_txpower(sdata, update_txp_type);
2220         mutex_unlock(&local->iflist_mtx);
2221
2222         return 0;
2223 }
2224
2225 static int ieee80211_get_tx_power(struct wiphy *wiphy,
2226                                   struct wireless_dev *wdev,
2227                                   int *dbm)
2228 {
2229         struct ieee80211_local *local = wiphy_priv(wiphy);
2230         struct ieee80211_sub_if_data *sdata = IEEE80211_WDEV_TO_SUB_IF(wdev);
2231
2232         if (local->ops->get_txpower)
2233                 return drv_get_txpower(local, sdata, dbm);
2234
2235         if (!local->use_chanctx)
2236                 *dbm = local->hw.conf.power_level;
2237         else
2238                 *dbm = sdata->vif.bss_conf.txpower;
2239
2240         return 0;
2241 }
2242
2243 static int ieee80211_set_wds_peer(struct wiphy *wiphy, struct net_device *dev,
2244                                   const u8 *addr)
2245 {
2246         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2247
2248         memcpy(&sdata->u.wds.remote_addr, addr, ETH_ALEN);
2249
2250         return 0;
2251 }
2252
2253 static void ieee80211_rfkill_poll(struct wiphy *wiphy)
2254 {
2255         struct ieee80211_local *local = wiphy_priv(wiphy);
2256
2257         drv_rfkill_poll(local);
2258 }
2259
2260 #ifdef CONFIG_NL80211_TESTMODE
2261 static int ieee80211_testmode_cmd(struct wiphy *wiphy,
2262                                   struct wireless_dev *wdev,
2263                                   void *data, int len)
2264 {
2265         struct ieee80211_local *local = wiphy_priv(wiphy);
2266         struct ieee80211_vif *vif = NULL;
2267
2268         if (!local->ops->testmode_cmd)
2269                 return -EOPNOTSUPP;
2270
2271         if (wdev) {
2272                 struct ieee80211_sub_if_data *sdata;
2273
2274                 sdata = IEEE80211_WDEV_TO_SUB_IF(wdev);
2275                 if (sdata->flags & IEEE80211_SDATA_IN_DRIVER)
2276                         vif = &sdata->vif;
2277         }
2278
2279         return local->ops->testmode_cmd(&local->hw, vif, data, len);
2280 }
2281
2282 static int ieee80211_testmode_dump(struct wiphy *wiphy,
2283                                    struct sk_buff *skb,
2284                                    struct netlink_callback *cb,
2285                                    void *data, int len)
2286 {
2287         struct ieee80211_local *local = wiphy_priv(wiphy);
2288
2289         if (!local->ops->testmode_dump)
2290                 return -EOPNOTSUPP;
2291
2292         return local->ops->testmode_dump(&local->hw, skb, cb, data, len);
2293 }
2294 #endif
2295
2296 int __ieee80211_request_smps_ap(struct ieee80211_sub_if_data *sdata,
2297                                 enum ieee80211_smps_mode smps_mode)
2298 {
2299         struct sta_info *sta;
2300         enum ieee80211_smps_mode old_req;
2301
2302         if (WARN_ON_ONCE(sdata->vif.type != NL80211_IFTYPE_AP))
2303                 return -EINVAL;
2304
2305         if (sdata->vif.bss_conf.chandef.width == NL80211_CHAN_WIDTH_20_NOHT)
2306                 return 0;
2307
2308         old_req = sdata->u.ap.req_smps;
2309         sdata->u.ap.req_smps = smps_mode;
2310
2311         /* AUTOMATIC doesn't mean much for AP - don't allow it */
2312         if (old_req == smps_mode ||
2313             smps_mode == IEEE80211_SMPS_AUTOMATIC)
2314                 return 0;
2315
2316          /* If no associated stations, there's no need to do anything */
2317         if (!atomic_read(&sdata->u.ap.num_mcast_sta)) {
2318                 sdata->smps_mode = smps_mode;
2319                 ieee80211_queue_work(&sdata->local->hw, &sdata->recalc_smps);
2320                 return 0;
2321         }
2322
2323         ht_dbg(sdata,
2324                "SMPS %d requested in AP mode, sending Action frame to %d stations\n",
2325                smps_mode, atomic_read(&sdata->u.ap.num_mcast_sta));
2326
2327         mutex_lock(&sdata->local->sta_mtx);
2328         list_for_each_entry(sta, &sdata->local->sta_list, list) {
2329                 /*
2330                  * Only stations associated to our AP and
2331                  * associated VLANs
2332                  */
2333                 if (sta->sdata->bss != &sdata->u.ap)
2334                         continue;
2335
2336                 /* This station doesn't support MIMO - skip it */
2337                 if (sta_info_tx_streams(sta) == 1)
2338                         continue;
2339
2340                 /*
2341                  * Don't wake up a STA just to send the action frame
2342                  * unless we are getting more restrictive.
2343                  */
2344                 if (test_sta_flag(sta, WLAN_STA_PS_STA) &&
2345                     !ieee80211_smps_is_restrictive(sta->known_smps_mode,
2346                                                    smps_mode)) {
2347                         ht_dbg(sdata, "Won't send SMPS to sleeping STA %pM\n",
2348                                sta->sta.addr);
2349                         continue;
2350                 }
2351
2352                 /*
2353                  * If the STA is not authorized, wait until it gets
2354                  * authorized and the action frame will be sent then.
2355                  */
2356                 if (!test_sta_flag(sta, WLAN_STA_AUTHORIZED))
2357                         continue;
2358
2359                 ht_dbg(sdata, "Sending SMPS to %pM\n", sta->sta.addr);
2360                 ieee80211_send_smps_action(sdata, smps_mode, sta->sta.addr,
2361                                            sdata->vif.bss_conf.bssid);
2362         }
2363         mutex_unlock(&sdata->local->sta_mtx);
2364
2365         sdata->smps_mode = smps_mode;
2366         ieee80211_queue_work(&sdata->local->hw, &sdata->recalc_smps);
2367
2368         return 0;
2369 }
2370
2371 int __ieee80211_request_smps_mgd(struct ieee80211_sub_if_data *sdata,
2372                                  enum ieee80211_smps_mode smps_mode)
2373 {
2374         const u8 *ap;
2375         enum ieee80211_smps_mode old_req;
2376         int err;
2377         struct sta_info *sta;
2378         bool tdls_peer_found = false;
2379
2380         lockdep_assert_held(&sdata->wdev.mtx);
2381
2382         if (WARN_ON_ONCE(sdata->vif.type != NL80211_IFTYPE_STATION))
2383                 return -EINVAL;
2384
2385         old_req = sdata->u.mgd.req_smps;
2386         sdata->u.mgd.req_smps = smps_mode;
2387
2388         if (old_req == smps_mode &&
2389             smps_mode != IEEE80211_SMPS_AUTOMATIC)
2390                 return 0;
2391
2392         /*
2393          * If not associated, or current association is not an HT
2394          * association, there's no need to do anything, just store
2395          * the new value until we associate.
2396          */
2397         if (!sdata->u.mgd.associated ||
2398             sdata->vif.bss_conf.chandef.width == NL80211_CHAN_WIDTH_20_NOHT)
2399                 return 0;
2400
2401         ap = sdata->u.mgd.associated->bssid;
2402
2403         rcu_read_lock();
2404         list_for_each_entry_rcu(sta, &sdata->local->sta_list, list) {
2405                 if (!sta->sta.tdls || sta->sdata != sdata || !sta->uploaded ||
2406                     !test_sta_flag(sta, WLAN_STA_AUTHORIZED))
2407                         continue;
2408
2409                 tdls_peer_found = true;
2410                 break;
2411         }
2412         rcu_read_unlock();
2413
2414         if (smps_mode == IEEE80211_SMPS_AUTOMATIC) {
2415                 if (tdls_peer_found || !sdata->u.mgd.powersave)
2416                         smps_mode = IEEE80211_SMPS_OFF;
2417                 else
2418                         smps_mode = IEEE80211_SMPS_DYNAMIC;
2419         }
2420
2421         /* send SM PS frame to AP */
2422         err = ieee80211_send_smps_action(sdata, smps_mode,
2423                                          ap, ap);
2424         if (err)
2425                 sdata->u.mgd.req_smps = old_req;
2426         else if (smps_mode != IEEE80211_SMPS_OFF && tdls_peer_found)
2427                 ieee80211_teardown_tdls_peers(sdata);
2428
2429         return err;
2430 }
2431
2432 static int ieee80211_set_power_mgmt(struct wiphy *wiphy, struct net_device *dev,
2433                                     bool enabled, int timeout)
2434 {
2435         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2436         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2437
2438         if (sdata->vif.type != NL80211_IFTYPE_STATION)
2439                 return -EOPNOTSUPP;
2440
2441         if (!ieee80211_hw_check(&local->hw, SUPPORTS_PS))
2442                 return -EOPNOTSUPP;
2443
2444         if (enabled == sdata->u.mgd.powersave &&
2445             timeout == local->dynamic_ps_forced_timeout)
2446                 return 0;
2447
2448         sdata->u.mgd.powersave = enabled;
2449         local->dynamic_ps_forced_timeout = timeout;
2450
2451         /* no change, but if automatic follow powersave */
2452         sdata_lock(sdata);
2453         __ieee80211_request_smps_mgd(sdata, sdata->u.mgd.req_smps);
2454         sdata_unlock(sdata);
2455
2456         if (ieee80211_hw_check(&local->hw, SUPPORTS_DYNAMIC_PS))
2457                 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
2458
2459         ieee80211_recalc_ps(local);
2460         ieee80211_recalc_ps_vif(sdata);
2461
2462         return 0;
2463 }
2464
2465 static int ieee80211_set_cqm_rssi_config(struct wiphy *wiphy,
2466                                          struct net_device *dev,
2467                                          s32 rssi_thold, u32 rssi_hyst)
2468 {
2469         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2470         struct ieee80211_vif *vif = &sdata->vif;
2471         struct ieee80211_bss_conf *bss_conf = &vif->bss_conf;
2472
2473         if (rssi_thold == bss_conf->cqm_rssi_thold &&
2474             rssi_hyst == bss_conf->cqm_rssi_hyst)
2475                 return 0;
2476
2477         if (sdata->vif.driver_flags & IEEE80211_VIF_BEACON_FILTER &&
2478             !(sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI))
2479                 return -EOPNOTSUPP;
2480
2481         bss_conf->cqm_rssi_thold = rssi_thold;
2482         bss_conf->cqm_rssi_hyst = rssi_hyst;
2483         sdata->u.mgd.last_cqm_event_signal = 0;
2484
2485         /* tell the driver upon association, unless already associated */
2486         if (sdata->u.mgd.associated &&
2487             sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI)
2488                 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_CQM);
2489
2490         return 0;
2491 }
2492
2493 static int ieee80211_set_bitrate_mask(struct wiphy *wiphy,
2494                                       struct net_device *dev,
2495                                       const u8 *addr,
2496                                       const struct cfg80211_bitrate_mask *mask)
2497 {
2498         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2499         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2500         int i, ret;
2501
2502         if (!ieee80211_sdata_running(sdata))
2503                 return -ENETDOWN;
2504
2505         if (ieee80211_hw_check(&local->hw, HAS_RATE_CONTROL)) {
2506                 ret = drv_set_bitrate_mask(local, sdata, mask);
2507                 if (ret)
2508                         return ret;
2509         }
2510
2511         for (i = 0; i < NUM_NL80211_BANDS; i++) {
2512                 struct ieee80211_supported_band *sband = wiphy->bands[i];
2513                 int j;
2514
2515                 sdata->rc_rateidx_mask[i] = mask->control[i].legacy;
2516                 memcpy(sdata->rc_rateidx_mcs_mask[i], mask->control[i].ht_mcs,
2517                        sizeof(mask->control[i].ht_mcs));
2518                 memcpy(sdata->rc_rateidx_vht_mcs_mask[i],
2519                        mask->control[i].vht_mcs,
2520                        sizeof(mask->control[i].vht_mcs));
2521
2522                 sdata->rc_has_mcs_mask[i] = false;
2523                 sdata->rc_has_vht_mcs_mask[i] = false;
2524                 if (!sband)
2525                         continue;
2526
2527                 for (j = 0; j < IEEE80211_HT_MCS_MASK_LEN; j++) {
2528                         if (~sdata->rc_rateidx_mcs_mask[i][j]) {
2529                                 sdata->rc_has_mcs_mask[i] = true;
2530                                 break;
2531                         }
2532                 }
2533
2534                 for (j = 0; j < NL80211_VHT_NSS_MAX; j++) {
2535                         if (~sdata->rc_rateidx_vht_mcs_mask[i][j]) {
2536                                 sdata->rc_has_vht_mcs_mask[i] = true;
2537                                 break;
2538                         }
2539                 }
2540         }
2541
2542         return 0;
2543 }
2544
2545 static int ieee80211_start_radar_detection(struct wiphy *wiphy,
2546                                            struct net_device *dev,
2547                                            struct cfg80211_chan_def *chandef,
2548                                            u32 cac_time_ms)
2549 {
2550         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2551         struct ieee80211_local *local = sdata->local;
2552         int err;
2553
2554         mutex_lock(&local->mtx);
2555         if (!list_empty(&local->roc_list) || local->scanning) {
2556                 err = -EBUSY;
2557                 goto out_unlock;
2558         }
2559
2560         /* whatever, but channel contexts should not complain about that one */
2561         sdata->smps_mode = IEEE80211_SMPS_OFF;
2562         sdata->needed_rx_chains = local->rx_chains;
2563
2564         err = ieee80211_vif_use_channel(sdata, chandef,
2565                                         IEEE80211_CHANCTX_SHARED);
2566         if (err)
2567                 goto out_unlock;
2568
2569         ieee80211_queue_delayed_work(&sdata->local->hw,
2570                                      &sdata->dfs_cac_timer_work,
2571                                      msecs_to_jiffies(cac_time_ms));
2572
2573  out_unlock:
2574         mutex_unlock(&local->mtx);
2575         return err;
2576 }
2577
2578 static struct cfg80211_beacon_data *
2579 cfg80211_beacon_dup(struct cfg80211_beacon_data *beacon)
2580 {
2581         struct cfg80211_beacon_data *new_beacon;
2582         u8 *pos;
2583         int len;
2584
2585         len = beacon->head_len + beacon->tail_len + beacon->beacon_ies_len +
2586               beacon->proberesp_ies_len + beacon->assocresp_ies_len +
2587               beacon->probe_resp_len;
2588
2589         new_beacon = kzalloc(sizeof(*new_beacon) + len, GFP_KERNEL);
2590         if (!new_beacon)
2591                 return NULL;
2592
2593         pos = (u8 *)(new_beacon + 1);
2594         if (beacon->head_len) {
2595                 new_beacon->head_len = beacon->head_len;
2596                 new_beacon->head = pos;
2597                 memcpy(pos, beacon->head, beacon->head_len);
2598                 pos += beacon->head_len;
2599         }
2600         if (beacon->tail_len) {
2601                 new_beacon->tail_len = beacon->tail_len;
2602                 new_beacon->tail = pos;
2603                 memcpy(pos, beacon->tail, beacon->tail_len);
2604                 pos += beacon->tail_len;
2605         }
2606         if (beacon->beacon_ies_len) {
2607                 new_beacon->beacon_ies_len = beacon->beacon_ies_len;
2608                 new_beacon->beacon_ies = pos;
2609                 memcpy(pos, beacon->beacon_ies, beacon->beacon_ies_len);
2610                 pos += beacon->beacon_ies_len;
2611         }
2612         if (beacon->proberesp_ies_len) {
2613                 new_beacon->proberesp_ies_len = beacon->proberesp_ies_len;
2614                 new_beacon->proberesp_ies = pos;
2615                 memcpy(pos, beacon->proberesp_ies, beacon->proberesp_ies_len);
2616                 pos += beacon->proberesp_ies_len;
2617         }
2618         if (beacon->assocresp_ies_len) {
2619                 new_beacon->assocresp_ies_len = beacon->assocresp_ies_len;
2620                 new_beacon->assocresp_ies = pos;
2621                 memcpy(pos, beacon->assocresp_ies, beacon->assocresp_ies_len);
2622                 pos += beacon->assocresp_ies_len;
2623         }
2624         if (beacon->probe_resp_len) {
2625                 new_beacon->probe_resp_len = beacon->probe_resp_len;
2626                 beacon->probe_resp = pos;
2627                 memcpy(pos, beacon->probe_resp, beacon->probe_resp_len);
2628                 pos += beacon->probe_resp_len;
2629         }
2630
2631         return new_beacon;
2632 }
2633
2634 void ieee80211_csa_finish(struct ieee80211_vif *vif)
2635 {
2636         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2637
2638         ieee80211_queue_work(&sdata->local->hw,
2639                              &sdata->csa_finalize_work);
2640 }
2641 EXPORT_SYMBOL(ieee80211_csa_finish);
2642
2643 static int ieee80211_set_after_csa_beacon(struct ieee80211_sub_if_data *sdata,
2644                                           u32 *changed)
2645 {
2646         int err;
2647
2648         switch (sdata->vif.type) {
2649         case NL80211_IFTYPE_AP:
2650                 err = ieee80211_assign_beacon(sdata, sdata->u.ap.next_beacon,
2651                                               NULL);
2652                 kfree(sdata->u.ap.next_beacon);
2653                 sdata->u.ap.next_beacon = NULL;
2654
2655                 if (err < 0)
2656                         return err;
2657                 *changed |= err;
2658                 break;
2659         case NL80211_IFTYPE_ADHOC:
2660                 err = ieee80211_ibss_finish_csa(sdata);
2661                 if (err < 0)
2662                         return err;
2663                 *changed |= err;
2664                 break;
2665 #ifdef CONFIG_MAC80211_MESH
2666         case NL80211_IFTYPE_MESH_POINT:
2667                 err = ieee80211_mesh_finish_csa(sdata);
2668                 if (err < 0)
2669                         return err;
2670                 *changed |= err;
2671                 break;
2672 #endif
2673         default:
2674                 WARN_ON(1);
2675                 return -EINVAL;
2676         }
2677
2678         return 0;
2679 }
2680
2681 static int __ieee80211_csa_finalize(struct ieee80211_sub_if_data *sdata)
2682 {
2683         struct ieee80211_local *local = sdata->local;
2684         u32 changed = 0;
2685         int err;
2686
2687         sdata_assert_lock(sdata);
2688         lockdep_assert_held(&local->mtx);
2689         lockdep_assert_held(&local->chanctx_mtx);
2690
2691         /*
2692          * using reservation isn't immediate as it may be deferred until later
2693          * with multi-vif. once reservation is complete it will re-schedule the
2694          * work with no reserved_chanctx so verify chandef to check if it
2695          * completed successfully
2696          */
2697
2698         if (sdata->reserved_chanctx) {
2699                 /*
2700                  * with multi-vif csa driver may call ieee80211_csa_finish()
2701                  * many times while waiting for other interfaces to use their
2702                  * reservations
2703                  */
2704                 if (sdata->reserved_ready)
2705                         return 0;
2706
2707                 return ieee80211_vif_use_reserved_context(sdata);
2708         }
2709
2710         if (!cfg80211_chandef_identical(&sdata->vif.bss_conf.chandef,
2711                                         &sdata->csa_chandef))
2712                 return -EINVAL;
2713
2714         sdata->vif.csa_active = false;
2715
2716         err = ieee80211_set_after_csa_beacon(sdata, &changed);
2717         if (err)
2718                 return err;
2719
2720         ieee80211_bss_info_change_notify(sdata, changed);
2721
2722         if (sdata->csa_block_tx) {
2723                 ieee80211_wake_vif_queues(local, sdata,
2724                                           IEEE80211_QUEUE_STOP_REASON_CSA);
2725                 sdata->csa_block_tx = false;
2726         }
2727
2728         err = drv_post_channel_switch(sdata);
2729         if (err)
2730                 return err;
2731
2732         cfg80211_ch_switch_notify(sdata->dev, &sdata->csa_chandef);
2733
2734         return 0;
2735 }
2736
2737 static void ieee80211_csa_finalize(struct ieee80211_sub_if_data *sdata)
2738 {
2739         if (__ieee80211_csa_finalize(sdata)) {
2740                 sdata_info(sdata, "failed to finalize CSA, disconnecting\n");
2741                 cfg80211_stop_iface(sdata->local->hw.wiphy, &sdata->wdev,
2742                                     GFP_KERNEL);
2743         }
2744 }
2745
2746 void ieee80211_csa_finalize_work(struct work_struct *work)
2747 {
2748         struct ieee80211_sub_if_data *sdata =
2749                 container_of(work, struct ieee80211_sub_if_data,
2750                              csa_finalize_work);
2751         struct ieee80211_local *local = sdata->local;
2752
2753         sdata_lock(sdata);
2754         mutex_lock(&local->mtx);
2755         mutex_lock(&local->chanctx_mtx);
2756
2757         /* AP might have been stopped while waiting for the lock. */
2758         if (!sdata->vif.csa_active)
2759                 goto unlock;
2760
2761         if (!ieee80211_sdata_running(sdata))
2762                 goto unlock;
2763
2764         ieee80211_csa_finalize(sdata);
2765
2766 unlock:
2767         mutex_unlock(&local->chanctx_mtx);
2768         mutex_unlock(&local->mtx);
2769         sdata_unlock(sdata);
2770 }
2771
2772 static int ieee80211_set_csa_beacon(struct ieee80211_sub_if_data *sdata,
2773                                     struct cfg80211_csa_settings *params,
2774                                     u32 *changed)
2775 {
2776         struct ieee80211_csa_settings csa = {};
2777         int err;
2778
2779         switch (sdata->vif.type) {
2780         case NL80211_IFTYPE_AP:
2781                 sdata->u.ap.next_beacon =
2782                         cfg80211_beacon_dup(&params->beacon_after);
2783                 if (!sdata->u.ap.next_beacon)
2784                         return -ENOMEM;
2785
2786                 /*
2787                  * With a count of 0, we don't have to wait for any
2788                  * TBTT before switching, so complete the CSA
2789                  * immediately.  In theory, with a count == 1 we
2790                  * should delay the switch until just before the next
2791                  * TBTT, but that would complicate things so we switch
2792                  * immediately too.  If we would delay the switch
2793                  * until the next TBTT, we would have to set the probe
2794                  * response here.
2795                  *
2796                  * TODO: A channel switch with count <= 1 without
2797                  * sending a CSA action frame is kind of useless,
2798                  * because the clients won't know we're changing
2799                  * channels.  The action frame must be implemented
2800                  * either here or in the userspace.
2801                  */
2802                 if (params->count <= 1)
2803                         break;
2804
2805                 if ((params->n_counter_offsets_beacon >
2806                      IEEE80211_MAX_CSA_COUNTERS_NUM) ||
2807                     (params->n_counter_offsets_presp >
2808                      IEEE80211_MAX_CSA_COUNTERS_NUM))
2809                         return -EINVAL;
2810
2811                 csa.counter_offsets_beacon = params->counter_offsets_beacon;
2812                 csa.counter_offsets_presp = params->counter_offsets_presp;
2813                 csa.n_counter_offsets_beacon = params->n_counter_offsets_beacon;
2814                 csa.n_counter_offsets_presp = params->n_counter_offsets_presp;
2815                 csa.count = params->count;
2816
2817                 err = ieee80211_assign_beacon(sdata, &params->beacon_csa, &csa);
2818                 if (err < 0) {
2819                         kfree(sdata->u.ap.next_beacon);
2820                         return err;
2821                 }
2822                 *changed |= err;
2823
2824                 break;
2825         case NL80211_IFTYPE_ADHOC:
2826                 if (!sdata->vif.bss_conf.ibss_joined)
2827                         return -EINVAL;
2828
2829                 if (params->chandef.width != sdata->u.ibss.chandef.width)
2830                         return -EINVAL;
2831
2832                 switch (params->chandef.width) {
2833                 case NL80211_CHAN_WIDTH_40:
2834                         if (cfg80211_get_chandef_type(&params->chandef) !=
2835                             cfg80211_get_chandef_type(&sdata->u.ibss.chandef))
2836                                 return -EINVAL;
2837                 case NL80211_CHAN_WIDTH_5:
2838                 case NL80211_CHAN_WIDTH_10:
2839                 case NL80211_CHAN_WIDTH_20_NOHT:
2840                 case NL80211_CHAN_WIDTH_20:
2841                         break;
2842                 default:
2843                         return -EINVAL;
2844                 }
2845
2846                 /* changes into another band are not supported */
2847                 if (sdata->u.ibss.chandef.chan->band !=
2848                     params->chandef.chan->band)
2849                         return -EINVAL;
2850
2851                 /* see comments in the NL80211_IFTYPE_AP block */
2852                 if (params->count > 1) {
2853                         err = ieee80211_ibss_csa_beacon(sdata, params);
2854                         if (err < 0)
2855                                 return err;
2856                         *changed |= err;
2857                 }
2858
2859                 ieee80211_send_action_csa(sdata, params);
2860
2861                 break;
2862 #ifdef CONFIG_MAC80211_MESH
2863         case NL80211_IFTYPE_MESH_POINT: {
2864                 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
2865
2866                 if (params->chandef.width != sdata->vif.bss_conf.chandef.width)
2867                         return -EINVAL;
2868
2869                 /* changes into another band are not supported */
2870                 if (sdata->vif.bss_conf.chandef.chan->band !=
2871                     params->chandef.chan->band)
2872                         return -EINVAL;
2873
2874                 if (ifmsh->csa_role == IEEE80211_MESH_CSA_ROLE_NONE) {
2875                         ifmsh->csa_role = IEEE80211_MESH_CSA_ROLE_INIT;
2876                         if (!ifmsh->pre_value)
2877                                 ifmsh->pre_value = 1;
2878                         else
2879                                 ifmsh->pre_value++;
2880                 }
2881
2882                 /* see comments in the NL80211_IFTYPE_AP block */
2883                 if (params->count > 1) {
2884                         err = ieee80211_mesh_csa_beacon(sdata, params);
2885                         if (err < 0) {
2886                                 ifmsh->csa_role = IEEE80211_MESH_CSA_ROLE_NONE;
2887                                 return err;
2888                         }
2889                         *changed |= err;
2890                 }
2891
2892                 if (ifmsh->csa_role == IEEE80211_MESH_CSA_ROLE_INIT)
2893                         ieee80211_send_action_csa(sdata, params);
2894
2895                 break;
2896                 }
2897 #endif
2898         default:
2899                 return -EOPNOTSUPP;
2900         }
2901
2902         return 0;
2903 }
2904
2905 static int
2906 __ieee80211_channel_switch(struct wiphy *wiphy, struct net_device *dev,
2907                            struct cfg80211_csa_settings *params)
2908 {
2909         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2910         struct ieee80211_local *local = sdata->local;
2911         struct ieee80211_channel_switch ch_switch;
2912         struct ieee80211_chanctx_conf *conf;
2913         struct ieee80211_chanctx *chanctx;
2914         u32 changed = 0;
2915         int err;
2916
2917         sdata_assert_lock(sdata);
2918         lockdep_assert_held(&local->mtx);
2919
2920         if (!list_empty(&local->roc_list) || local->scanning)
2921                 return -EBUSY;
2922
2923         if (sdata->wdev.cac_started)
2924                 return -EBUSY;
2925
2926         if (cfg80211_chandef_identical(&params->chandef,
2927                                        &sdata->vif.bss_conf.chandef))
2928                 return -EINVAL;
2929
2930         /* don't allow another channel switch if one is already active. */
2931         if (sdata->vif.csa_active)
2932                 return -EBUSY;
2933
2934         mutex_lock(&local->chanctx_mtx);
2935         conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
2936                                          lockdep_is_held(&local->chanctx_mtx));
2937         if (!conf) {
2938                 err = -EBUSY;
2939                 goto out;
2940         }
2941
2942         chanctx = container_of(conf, struct ieee80211_chanctx, conf);
2943         if (!chanctx) {
2944                 err = -EBUSY;
2945                 goto out;
2946         }
2947
2948         ch_switch.timestamp = 0;
2949         ch_switch.device_timestamp = 0;
2950         ch_switch.block_tx = params->block_tx;
2951         ch_switch.chandef = params->chandef;
2952         ch_switch.count = params->count;
2953
2954         err = drv_pre_channel_switch(sdata, &ch_switch);
2955         if (err)
2956                 goto out;
2957
2958         err = ieee80211_vif_reserve_chanctx(sdata, &params->chandef,
2959                                             chanctx->mode,
2960                                             params->radar_required);
2961         if (err)
2962                 goto out;
2963
2964         /* if reservation is invalid then this will fail */
2965         err = ieee80211_check_combinations(sdata, NULL, chanctx->mode, 0);
2966         if (err) {
2967                 ieee80211_vif_unreserve_chanctx(sdata);
2968                 goto out;
2969         }
2970
2971         err = ieee80211_set_csa_beacon(sdata, params, &changed);
2972         if (err) {
2973                 ieee80211_vif_unreserve_chanctx(sdata);
2974                 goto out;
2975         }
2976
2977         sdata->csa_chandef = params->chandef;
2978         sdata->csa_block_tx = params->block_tx;
2979         sdata->vif.csa_active = true;
2980
2981         if (sdata->csa_block_tx)
2982                 ieee80211_stop_vif_queues(local, sdata,
2983                                           IEEE80211_QUEUE_STOP_REASON_CSA);
2984
2985         cfg80211_ch_switch_started_notify(sdata->dev, &sdata->csa_chandef,
2986                                           params->count);
2987
2988         if (changed) {
2989                 ieee80211_bss_info_change_notify(sdata, changed);
2990                 drv_channel_switch_beacon(sdata, &params->chandef);
2991         } else {
2992                 /* if the beacon didn't change, we can finalize immediately */
2993                 ieee80211_csa_finalize(sdata);
2994         }
2995
2996 out:
2997         mutex_unlock(&local->chanctx_mtx);
2998         return err;
2999 }
3000
3001 int ieee80211_channel_switch(struct wiphy *wiphy, struct net_device *dev,
3002                              struct cfg80211_csa_settings *params)
3003 {
3004         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3005         struct ieee80211_local *local = sdata->local;
3006         int err;
3007
3008         mutex_lock(&local->mtx);
3009         err = __ieee80211_channel_switch(wiphy, dev, params);
3010         mutex_unlock(&local->mtx);
3011
3012         return err;
3013 }
3014
3015 u64 ieee80211_mgmt_tx_cookie(struct ieee80211_local *local)
3016 {
3017         lockdep_assert_held(&local->mtx);
3018
3019         local->roc_cookie_counter++;
3020
3021         /* wow, you wrapped 64 bits ... more likely a bug */
3022         if (WARN_ON(local->roc_cookie_counter == 0))
3023                 local->roc_cookie_counter++;
3024
3025         return local->roc_cookie_counter;
3026 }
3027
3028 int ieee80211_attach_ack_skb(struct ieee80211_local *local, struct sk_buff *skb,
3029                              u64 *cookie, gfp_t gfp)
3030 {
3031         unsigned long spin_flags;
3032         struct sk_buff *ack_skb;
3033         int id;
3034
3035         ack_skb = skb_copy(skb, gfp);
3036         if (!ack_skb)
3037                 return -ENOMEM;
3038
3039         spin_lock_irqsave(&local->ack_status_lock, spin_flags);
3040         id = idr_alloc(&local->ack_status_frames, ack_skb,
3041                        1, 0x10000, GFP_ATOMIC);
3042         spin_unlock_irqrestore(&local->ack_status_lock, spin_flags);
3043
3044         if (id < 0) {
3045                 kfree_skb(ack_skb);
3046                 return -ENOMEM;
3047         }
3048
3049         IEEE80211_SKB_CB(skb)->ack_frame_id = id;
3050
3051         *cookie = ieee80211_mgmt_tx_cookie(local);
3052         IEEE80211_SKB_CB(ack_skb)->ack.cookie = *cookie;
3053
3054         return 0;
3055 }
3056
3057 static void ieee80211_mgmt_frame_register(struct wiphy *wiphy,
3058                                           struct wireless_dev *wdev,
3059                                           u16 frame_type, bool reg)
3060 {
3061         struct ieee80211_local *local = wiphy_priv(wiphy);
3062         struct ieee80211_sub_if_data *sdata = IEEE80211_WDEV_TO_SUB_IF(wdev);
3063
3064         switch (frame_type) {
3065         case IEEE80211_FTYPE_MGMT | IEEE80211_STYPE_PROBE_REQ:
3066                 if (reg) {
3067                         local->probe_req_reg++;
3068                         sdata->vif.probe_req_reg++;
3069                 } else {
3070                         if (local->probe_req_reg)
3071                                 local->probe_req_reg--;
3072
3073                         if (sdata->vif.probe_req_reg)
3074                                 sdata->vif.probe_req_reg--;
3075                 }
3076
3077                 if (!local->open_count)
3078                         break;
3079
3080                 if (sdata->vif.probe_req_reg == 1)
3081                         drv_config_iface_filter(local, sdata, FIF_PROBE_REQ,
3082                                                 FIF_PROBE_REQ);
3083                 else if (sdata->vif.probe_req_reg == 0)
3084                         drv_config_iface_filter(local, sdata, 0,
3085                                                 FIF_PROBE_REQ);
3086
3087                 ieee80211_configure_filter(local);
3088                 break;
3089         default:
3090                 break;
3091         }
3092 }
3093
3094 static int ieee80211_set_antenna(struct wiphy *wiphy, u32 tx_ant, u32 rx_ant)
3095 {
3096         struct ieee80211_local *local = wiphy_priv(wiphy);
3097
3098         if (local->started)
3099                 return -EOPNOTSUPP;
3100
3101         return drv_set_antenna(local, tx_ant, rx_ant);
3102 }
3103
3104 static int ieee80211_get_antenna(struct wiphy *wiphy, u32 *tx_ant, u32 *rx_ant)
3105 {
3106         struct ieee80211_local *local = wiphy_priv(wiphy);
3107
3108         return drv_get_antenna(local, tx_ant, rx_ant);
3109 }
3110
3111 static int ieee80211_set_rekey_data(struct wiphy *wiphy,
3112                                     struct net_device *dev,
3113                                     struct cfg80211_gtk_rekey_data *data)
3114 {
3115         struct ieee80211_local *local = wiphy_priv(wiphy);
3116         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3117
3118         if (!local->ops->set_rekey_data)
3119                 return -EOPNOTSUPP;
3120
3121         drv_set_rekey_data(local, sdata, data);
3122
3123         return 0;
3124 }
3125
3126 static int ieee80211_probe_client(struct wiphy *wiphy, struct net_device *dev,
3127                                   const u8 *peer, u64 *cookie)
3128 {
3129         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3130         struct ieee80211_local *local = sdata->local;
3131         struct ieee80211_qos_hdr *nullfunc;
3132         struct sk_buff *skb;
3133         int size = sizeof(*nullfunc);
3134         __le16 fc;
3135         bool qos;
3136         struct ieee80211_tx_info *info;
3137         struct sta_info *sta;
3138         struct ieee80211_chanctx_conf *chanctx_conf;
3139         enum nl80211_band band;
3140         int ret;
3141
3142         /* the lock is needed to assign the cookie later */
3143         mutex_lock(&local->mtx);
3144
3145         rcu_read_lock();
3146         chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
3147         if (WARN_ON(!chanctx_conf)) {
3148                 ret = -EINVAL;
3149                 goto unlock;
3150         }
3151         band = chanctx_conf->def.chan->band;
3152         sta = sta_info_get_bss(sdata, peer);
3153         if (sta) {
3154                 qos = sta->sta.wme;
3155         } else {
3156                 ret = -ENOLINK;
3157                 goto unlock;
3158         }
3159
3160         if (qos) {
3161                 fc = cpu_to_le16(IEEE80211_FTYPE_DATA |
3162                                  IEEE80211_STYPE_QOS_NULLFUNC |
3163                                  IEEE80211_FCTL_FROMDS);
3164         } else {
3165                 size -= 2;
3166                 fc = cpu_to_le16(IEEE80211_FTYPE_DATA |
3167                                  IEEE80211_STYPE_NULLFUNC |
3168                                  IEEE80211_FCTL_FROMDS);
3169         }
3170
3171         skb = dev_alloc_skb(local->hw.extra_tx_headroom + size);
3172         if (!skb) {
3173                 ret = -ENOMEM;
3174                 goto unlock;
3175         }
3176
3177         skb->dev = dev;
3178
3179         skb_reserve(skb, local->hw.extra_tx_headroom);
3180
3181         nullfunc = (void *) skb_put(skb, size);
3182         nullfunc->frame_control = fc;
3183         nullfunc->duration_id = 0;
3184         memcpy(nullfunc->addr1, sta->sta.addr, ETH_ALEN);
3185         memcpy(nullfunc->addr2, sdata->vif.addr, ETH_ALEN);
3186         memcpy(nullfunc->addr3, sdata->vif.addr, ETH_ALEN);
3187         nullfunc->seq_ctrl = 0;
3188
3189         info = IEEE80211_SKB_CB(skb);
3190
3191         info->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS |
3192                        IEEE80211_TX_INTFL_NL80211_FRAME_TX;
3193         info->band = band;
3194
3195         skb_set_queue_mapping(skb, IEEE80211_AC_VO);
3196         skb->priority = 7;
3197         if (qos)
3198                 nullfunc->qos_ctrl = cpu_to_le16(7);
3199
3200         ret = ieee80211_attach_ack_skb(local, skb, cookie, GFP_ATOMIC);
3201         if (ret) {
3202                 kfree_skb(skb);
3203                 goto unlock;
3204         }
3205
3206         local_bh_disable();
3207         ieee80211_xmit(sdata, sta, skb);
3208         local_bh_enable();
3209
3210         ret = 0;
3211 unlock:
3212         rcu_read_unlock();
3213         mutex_unlock(&local->mtx);
3214
3215         return ret;
3216 }
3217
3218 static int ieee80211_cfg_get_channel(struct wiphy *wiphy,
3219                                      struct wireless_dev *wdev,
3220                                      struct cfg80211_chan_def *chandef)
3221 {
3222         struct ieee80211_sub_if_data *sdata = IEEE80211_WDEV_TO_SUB_IF(wdev);
3223         struct ieee80211_local *local = wiphy_priv(wiphy);
3224         struct ieee80211_chanctx_conf *chanctx_conf;
3225         int ret = -ENODATA;
3226
3227         rcu_read_lock();
3228         chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
3229         if (chanctx_conf) {
3230                 *chandef = sdata->vif.bss_conf.chandef;
3231                 ret = 0;
3232         } else if (local->open_count > 0 &&
3233                    local->open_count == local->monitors &&
3234                    sdata->vif.type == NL80211_IFTYPE_MONITOR) {
3235                 if (local->use_chanctx)
3236                         *chandef = local->monitor_chandef;
3237                 else
3238                         *chandef = local->_oper_chandef;
3239                 ret = 0;
3240         }
3241         rcu_read_unlock();
3242
3243         return ret;
3244 }
3245
3246 #ifdef CONFIG_PM
3247 static void ieee80211_set_wakeup(struct wiphy *wiphy, bool enabled)
3248 {
3249         drv_set_wakeup(wiphy_priv(wiphy), enabled);
3250 }
3251 #endif
3252
3253 static int ieee80211_set_qos_map(struct wiphy *wiphy,
3254                                  struct net_device *dev,
3255                                  struct cfg80211_qos_map *qos_map)
3256 {
3257         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3258         struct mac80211_qos_map *new_qos_map, *old_qos_map;
3259
3260         if (qos_map) {
3261                 new_qos_map = kzalloc(sizeof(*new_qos_map), GFP_KERNEL);
3262                 if (!new_qos_map)
3263                         return -ENOMEM;
3264                 memcpy(&new_qos_map->qos_map, qos_map, sizeof(*qos_map));
3265         } else {
3266                 /* A NULL qos_map was passed to disable QoS mapping */
3267                 new_qos_map = NULL;
3268         }
3269
3270         old_qos_map = sdata_dereference(sdata->qos_map, sdata);
3271         rcu_assign_pointer(sdata->qos_map, new_qos_map);
3272         if (old_qos_map)
3273                 kfree_rcu(old_qos_map, rcu_head);
3274
3275         return 0;
3276 }
3277
3278 static int ieee80211_set_ap_chanwidth(struct wiphy *wiphy,
3279                                       struct net_device *dev,
3280                                       struct cfg80211_chan_def *chandef)
3281 {
3282         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3283         int ret;
3284         u32 changed = 0;
3285
3286         ret = ieee80211_vif_change_bandwidth(sdata, chandef, &changed);
3287         if (ret == 0)
3288                 ieee80211_bss_info_change_notify(sdata, changed);
3289
3290         return ret;
3291 }
3292
3293 static int ieee80211_add_tx_ts(struct wiphy *wiphy, struct net_device *dev,
3294                                u8 tsid, const u8 *peer, u8 up,
3295                                u16 admitted_time)
3296 {
3297         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3298         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3299         int ac = ieee802_1d_to_ac[up];
3300
3301         if (sdata->vif.type != NL80211_IFTYPE_STATION)
3302                 return -EOPNOTSUPP;
3303
3304         if (!(sdata->wmm_acm & BIT(up)))
3305                 return -EINVAL;
3306
3307         if (ifmgd->tx_tspec[ac].admitted_time)
3308                 return -EBUSY;
3309
3310         if (admitted_time) {
3311                 ifmgd->tx_tspec[ac].admitted_time = 32 * admitted_time;
3312                 ifmgd->tx_tspec[ac].tsid = tsid;
3313                 ifmgd->tx_tspec[ac].up = up;
3314         }
3315
3316         return 0;
3317 }
3318
3319 static int ieee80211_del_tx_ts(struct wiphy *wiphy, struct net_device *dev,
3320                                u8 tsid, const u8 *peer)
3321 {
3322         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3323         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3324         struct ieee80211_local *local = wiphy_priv(wiphy);
3325         int ac;
3326
3327         for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
3328                 struct ieee80211_sta_tx_tspec *tx_tspec = &ifmgd->tx_tspec[ac];
3329
3330                 /* skip unused entries */
3331                 if (!tx_tspec->admitted_time)
3332                         continue;
3333
3334                 if (tx_tspec->tsid != tsid)
3335                         continue;
3336
3337                 /* due to this new packets will be reassigned to non-ACM ACs */
3338                 tx_tspec->up = -1;
3339
3340                 /* Make sure that all packets have been sent to avoid to
3341                  * restore the QoS params on packets that are still on the
3342                  * queues.
3343                  */
3344                 synchronize_net();
3345                 ieee80211_flush_queues(local, sdata, false);
3346
3347                 /* restore the normal QoS parameters
3348                  * (unconditionally to avoid races)
3349                  */
3350                 tx_tspec->action = TX_TSPEC_ACTION_STOP_DOWNGRADE;
3351                 tx_tspec->downgraded = false;
3352                 ieee80211_sta_handle_tspec_ac_params(sdata);
3353
3354                 /* finally clear all the data */
3355                 memset(tx_tspec, 0, sizeof(*tx_tspec));
3356
3357                 return 0;
3358         }
3359
3360         return -ENOENT;
3361 }
3362
3363 const struct cfg80211_ops mac80211_config_ops = {
3364         .add_virtual_intf = ieee80211_add_iface,
3365         .del_virtual_intf = ieee80211_del_iface,
3366         .change_virtual_intf = ieee80211_change_iface,
3367         .start_p2p_device = ieee80211_start_p2p_device,
3368         .stop_p2p_device = ieee80211_stop_p2p_device,
3369         .add_key = ieee80211_add_key,
3370         .del_key = ieee80211_del_key,
3371         .get_key = ieee80211_get_key,
3372         .set_default_key = ieee80211_config_default_key,
3373         .set_default_mgmt_key = ieee80211_config_default_mgmt_key,
3374         .start_ap = ieee80211_start_ap,
3375         .change_beacon = ieee80211_change_beacon,
3376         .stop_ap = ieee80211_stop_ap,
3377         .add_station = ieee80211_add_station,
3378         .del_station = ieee80211_del_station,
3379         .change_station = ieee80211_change_station,
3380         .get_station = ieee80211_get_station,
3381         .dump_station = ieee80211_dump_station,
3382         .dump_survey = ieee80211_dump_survey,
3383 #ifdef CONFIG_MAC80211_MESH
3384         .add_mpath = ieee80211_add_mpath,
3385         .del_mpath = ieee80211_del_mpath,
3386         .change_mpath = ieee80211_change_mpath,
3387         .get_mpath = ieee80211_get_mpath,
3388         .dump_mpath = ieee80211_dump_mpath,
3389         .get_mpp = ieee80211_get_mpp,
3390         .dump_mpp = ieee80211_dump_mpp,
3391         .update_mesh_config = ieee80211_update_mesh_config,
3392         .get_mesh_config = ieee80211_get_mesh_config,
3393         .join_mesh = ieee80211_join_mesh,
3394         .leave_mesh = ieee80211_leave_mesh,
3395 #endif
3396         .join_ocb = ieee80211_join_ocb,
3397         .leave_ocb = ieee80211_leave_ocb,
3398         .change_bss = ieee80211_change_bss,
3399         .set_txq_params = ieee80211_set_txq_params,
3400         .set_monitor_channel = ieee80211_set_monitor_channel,
3401         .suspend = ieee80211_suspend,
3402         .resume = ieee80211_resume,
3403         .scan = ieee80211_scan,
3404         .abort_scan = ieee80211_abort_scan,
3405         .sched_scan_start = ieee80211_sched_scan_start,
3406         .sched_scan_stop = ieee80211_sched_scan_stop,
3407         .auth = ieee80211_auth,
3408         .assoc = ieee80211_assoc,
3409         .deauth = ieee80211_deauth,
3410         .disassoc = ieee80211_disassoc,
3411         .join_ibss = ieee80211_join_ibss,
3412         .leave_ibss = ieee80211_leave_ibss,
3413         .set_mcast_rate = ieee80211_set_mcast_rate,
3414         .set_wiphy_params = ieee80211_set_wiphy_params,
3415         .set_tx_power = ieee80211_set_tx_power,
3416         .get_tx_power = ieee80211_get_tx_power,
3417         .set_wds_peer = ieee80211_set_wds_peer,
3418         .rfkill_poll = ieee80211_rfkill_poll,
3419         CFG80211_TESTMODE_CMD(ieee80211_testmode_cmd)
3420         CFG80211_TESTMODE_DUMP(ieee80211_testmode_dump)
3421         .set_power_mgmt = ieee80211_set_power_mgmt,
3422         .set_bitrate_mask = ieee80211_set_bitrate_mask,
3423         .remain_on_channel = ieee80211_remain_on_channel,
3424         .cancel_remain_on_channel = ieee80211_cancel_remain_on_channel,
3425         .mgmt_tx = ieee80211_mgmt_tx,
3426         .mgmt_tx_cancel_wait = ieee80211_mgmt_tx_cancel_wait,
3427         .set_cqm_rssi_config = ieee80211_set_cqm_rssi_config,
3428         .mgmt_frame_register = ieee80211_mgmt_frame_register,
3429         .set_antenna = ieee80211_set_antenna,
3430         .get_antenna = ieee80211_get_antenna,
3431         .set_rekey_data = ieee80211_set_rekey_data,
3432         .tdls_oper = ieee80211_tdls_oper,
3433         .tdls_mgmt = ieee80211_tdls_mgmt,
3434         .tdls_channel_switch = ieee80211_tdls_channel_switch,
3435         .tdls_cancel_channel_switch = ieee80211_tdls_cancel_channel_switch,
3436         .probe_client = ieee80211_probe_client,
3437         .set_noack_map = ieee80211_set_noack_map,
3438 #ifdef CONFIG_PM
3439         .set_wakeup = ieee80211_set_wakeup,
3440 #endif
3441         .get_channel = ieee80211_cfg_get_channel,
3442         .start_radar_detection = ieee80211_start_radar_detection,
3443         .channel_switch = ieee80211_channel_switch,
3444         .set_qos_map = ieee80211_set_qos_map,
3445         .set_ap_chanwidth = ieee80211_set_ap_chanwidth,
3446         .add_tx_ts = ieee80211_add_tx_ts,
3447         .del_tx_ts = ieee80211_del_tx_ts,
3448 };