mac80211/iface.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  * Interface handling
   4  *
   5  * Copyright 2002-2005, Instant802 Networks, Inc.
   6  * Copyright 2005-2006, Devicescape Software, Inc.
   7  * Copyright (c) 2006 Jiri Benc <jbenc@suse.cz>
   8  * Copyright 2008, Johannes Berg <johannes@sipsolutions.net>
   9  * Copyright 2013-2014  Intel Mobile Communications GmbH
  10  * Copyright (c) 2016        Intel Deutschland GmbH
  11  * Copyright (C) 2018-2022 Intel Corporation
  12  */
  13 #include <linux/slab.h>
  14 #include <linux/kernel.h>
  15 #include <linux/if_arp.h>
  16 #include <linux/netdevice.h>
  17 #include <linux/rtnetlink.h>
  18 #include <linux/kcov.h>
  19 #include <net/mac80211.h>
  20 #include <net/ieee80211_radiotap.h>
  21 #include "ieee80211_i.h"
  22 #include "sta_info.h"
  23 #include "debugfs_netdev.h"
  24 #include "mesh.h"
  25 #include "led.h"
  26 #include "driver-ops.h"
  27 #include "wme.h"
  28 #include "rate.h"
  29
  30 /**
  31  * DOC: Interface list locking
  32  *
  33  * The interface list in each struct ieee80211_local is protected
  34  * three-fold:
  35  *
  36  * (1) modifications may only be done under the RTNL
  37  * (2) modifications and readers are protected against each other by
  38  *     the iflist_mtx.
  39  * (3) modifications are done in an RCU manner so atomic readers
  40  *     can traverse the list in RCU-safe blocks.
  41  *
  42  * As a consequence, reads (traversals) of the list can be protected
  43  * by either the RTNL, the iflist_mtx or RCU.
  44  */
  45
  46 static void ieee80211_iface_work(struct work_struct *work);
  47
  48 bool __ieee80211_recalc_txpower(struct ieee80211_sub_if_data *sdata)
  49 {
  50         struct ieee80211_chanctx_conf *chanctx_conf;
  51         int power;
  52
  53         rcu_read_lock();
  54         chanctx_conf = rcu_dereference(sdata->vif.bss_conf.chanctx_conf);
  55         if (!chanctx_conf) {
  56                 rcu_read_unlock();
  57                 return false;
  58         }
  59
  60         power = ieee80211_chandef_max_power(&chanctx_conf->def);
  61         rcu_read_unlock();
  62
  63         if (sdata->deflink.user_power_level != IEEE80211_UNSET_POWER_LEVEL)
  64                 power = min(power, sdata->deflink.user_power_level);
  65
  66         if (sdata->deflink.ap_power_level != IEEE80211_UNSET_POWER_LEVEL)
  67                 power = min(power, sdata->deflink.ap_power_level);
  68
  69         if (power != sdata->vif.bss_conf.txpower) {
  70                 sdata->vif.bss_conf.txpower = power;
  71                 ieee80211_hw_config(sdata->local, 0);
  72                 return true;
  73         }
  74
  75         return false;
  76 }
  77
  78 void ieee80211_recalc_txpower(struct ieee80211_sub_if_data *sdata,
  79                               bool update_bss)
  80 {
  81         if (__ieee80211_recalc_txpower(sdata) ||
  82             (update_bss && ieee80211_sdata_running(sdata)))
  83                 ieee80211_link_info_change_notify(sdata, &sdata->deflink,
  84                                                   BSS_CHANGED_TXPOWER);
  85 }
  86
  87 static u32 __ieee80211_idle_off(struct ieee80211_local *local)
  88 {
  89         if (!(local->hw.conf.flags & IEEE80211_CONF_IDLE))
  90                 return 0;
  91
  92         local->hw.conf.flags &= ~IEEE80211_CONF_IDLE;
  93         return IEEE80211_CONF_CHANGE_IDLE;
  94 }
  95
  96 static u32 __ieee80211_idle_on(struct ieee80211_local *local)
  97 {
  98         if (local->hw.conf.flags & IEEE80211_CONF_IDLE)
  99                 return 0;
 100
 101         ieee80211_flush_queues(local, NULL, false);
 102
 103         local->hw.conf.flags |= IEEE80211_CONF_IDLE;
 104         return IEEE80211_CONF_CHANGE_IDLE;
 105 }
 106
 107 static u32 __ieee80211_recalc_idle(struct ieee80211_local *local,
 108                                    bool force_active)
 109 {
 110         bool working, scanning, active;
 111         unsigned int led_trig_start = 0, led_trig_stop = 0;
 112
 113         lockdep_assert_held(&local->mtx);
 114
 115         active = force_active ||
 116                  !list_empty(&local->chanctx_list) ||
 117                  local->monitors;
 118
 119         working = !local->ops->remain_on_channel &&
 120                   !list_empty(&local->roc_list);
 121
 122         scanning = test_bit(SCAN_SW_SCANNING, &local->scanning) ||
 123                    test_bit(SCAN_ONCHANNEL_SCANNING, &local->scanning);
 124
 125         if (working || scanning)
 126                 led_trig_start |= IEEE80211_TPT_LEDTRIG_FL_WORK;
 127         else
 128                 led_trig_stop |= IEEE80211_TPT_LEDTRIG_FL_WORK;
 129
 130         if (active)
 131                 led_trig_start |= IEEE80211_TPT_LEDTRIG_FL_CONNECTED;
 132         else
 133                 led_trig_stop |= IEEE80211_TPT_LEDTRIG_FL_CONNECTED;
 134
 135         ieee80211_mod_tpt_led_trig(local, led_trig_start, led_trig_stop);
 136
 137         if (working || scanning || active)
 138                 return __ieee80211_idle_off(local);
 139         return __ieee80211_idle_on(local);
 140 }
 141
 142 u32 ieee80211_idle_off(struct ieee80211_local *local)
 143 {
 144         return __ieee80211_recalc_idle(local, true);
 145 }
 146
 147 void ieee80211_recalc_idle(struct ieee80211_local *local)
 148 {
 149         u32 change = __ieee80211_recalc_idle(local, false);
 150         if (change)
 151                 ieee80211_hw_config(local, change);
 152 }
 153
 154 static int ieee80211_verify_mac(struct ieee80211_sub_if_data *sdata, u8 *addr,
 155                                 bool check_dup)
 156 {
 157         struct ieee80211_local *local = sdata->local;
 158         struct ieee80211_sub_if_data *iter;
 159         u64 new, mask, tmp;
 160         u8 *m;
 161         int ret = 0;
 162
 163         if (is_zero_ether_addr(local->hw.wiphy->addr_mask))
 164                 return 0;
 165
 166         m = addr;
 167         new =   ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) |
 168                 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) |
 169                 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8);
 170
 171         m = local->hw.wiphy->addr_mask;
 172         mask =  ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) |
 173                 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) |
 174                 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8);
 175
 176         if (!check_dup)
 177                 return ret;
 178
 179         mutex_lock(&local->iflist_mtx);
 180         list_for_each_entry(iter, &local->interfaces, list) {
 181                 if (iter == sdata)
 182                         continue;
 183
 184                 if (iter->vif.type == NL80211_IFTYPE_MONITOR &&
 185                     !(iter->u.mntr.flags & MONITOR_FLAG_ACTIVE))
 186                         continue;
 187
 188                 m = iter->vif.addr;
 189                 tmp =   ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) |
 190                         ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) |
 191                         ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8);
 192
 193                 if ((new & ~mask) != (tmp & ~mask)) {
 194                         ret = -EINVAL;
 195                         break;
 196                 }
 197         }
 198         mutex_unlock(&local->iflist_mtx);
 199
 200         return ret;
 201 }
 202
 203 static int ieee80211_can_powered_addr_change(struct ieee80211_sub_if_data *sdata)
 204 {
 205         struct ieee80211_roc_work *roc;
 206         struct ieee80211_local *local = sdata->local;
 207         struct ieee80211_sub_if_data *scan_sdata;
 208         int ret = 0;
 209
 210         /* To be the most flexible here we want to only limit changing the
 211          * address if the specific interface is doing offchannel work or
 212          * scanning.
 213          */
 214         if (netif_carrier_ok(sdata->dev))
 215                 return -EBUSY;
 216
 217         mutex_lock(&local->mtx);
 218
 219         /* First check no ROC work is happening on this iface */
 220         list_for_each_entry(roc, &local->roc_list, list) {
 221                 if (roc->sdata != sdata)
 222                         continue;
 223
 224                 if (roc->started) {
 225                         ret = -EBUSY;
 226                         goto unlock;
 227                 }
 228         }
 229
 230         /* And if this iface is scanning */
 231         if (local->scanning) {
 232                 scan_sdata = rcu_dereference_protected(local->scan_sdata,
 233                                                        lockdep_is_held(&local->mtx));
 234                 if (sdata == scan_sdata)
 235                         ret = -EBUSY;
 236         }
 237
 238         switch (sdata->vif.type) {
 239         case NL80211_IFTYPE_STATION:
 240         case NL80211_IFTYPE_P2P_CLIENT:
 241                 /* More interface types could be added here but changing the
 242                  * address while powered makes the most sense in client modes.
 243                  */
 244                 break;
 245         default:
 246                 ret = -EOPNOTSUPP;
 247         }
 248
 249 unlock:
 250         mutex_unlock(&local->mtx);
 251         return ret;
 252 }
 253
 254 static int ieee80211_change_mac(struct net_device *dev, void *addr)
 255 {
 256         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 257         struct ieee80211_local *local = sdata->local;
 258         struct sockaddr *sa = addr;
 259         bool check_dup = true;
 260         bool live = false;
 261         int ret;
 262
 263         if (ieee80211_sdata_running(sdata)) {
 264                 ret = ieee80211_can_powered_addr_change(sdata);
 265                 if (ret)
 266                         return ret;
 267
 268                 live = true;
 269         }
 270
 271         if (sdata->vif.type == NL80211_IFTYPE_MONITOR &&
 272             !(sdata->u.mntr.flags & MONITOR_FLAG_ACTIVE))
 273                 check_dup = false;
 274
 275         ret = ieee80211_verify_mac(sdata, sa->sa_data, check_dup);
 276         if (ret)
 277                 return ret;
 278
 279         if (live)
 280                 drv_remove_interface(local, sdata);
 281         ret = eth_mac_addr(dev, sa);
 282
 283         if (ret == 0) {
 284                 memcpy(sdata->vif.addr, sa->sa_data, ETH_ALEN);
 285                 ether_addr_copy(sdata->vif.bss_conf.addr, sdata->vif.addr);
 286         }
 287
 288         /* Regardless of eth_mac_addr() return we still want to add the
 289          * interface back. This should not fail...
 290          */
 291         if (live)
 292                 WARN_ON(drv_add_interface(local, sdata));
 293
 294         return ret;
 295 }
 296
 297 static inline int identical_mac_addr_allowed(int type1, int type2)
 298 {
 299         return type1 == NL80211_IFTYPE_MONITOR ||
 300                 type2 == NL80211_IFTYPE_MONITOR ||
 301                 type1 == NL80211_IFTYPE_P2P_DEVICE ||
 302                 type2 == NL80211_IFTYPE_P2P_DEVICE ||
 303                 (type1 == NL80211_IFTYPE_AP && type2 == NL80211_IFTYPE_AP_VLAN) ||
 304                 (type1 == NL80211_IFTYPE_AP_VLAN &&
 305                         (type2 == NL80211_IFTYPE_AP ||
 306                          type2 == NL80211_IFTYPE_AP_VLAN));
 307 }
 308
 309 static int ieee80211_check_concurrent_iface(struct ieee80211_sub_if_data *sdata,
 310                                             enum nl80211_iftype iftype)
 311 {
 312         struct ieee80211_local *local = sdata->local;
 313         struct ieee80211_sub_if_data *nsdata;
 314         int ret;
 315
 316         ASSERT_RTNL();
 317
 318         /* we hold the RTNL here so can safely walk the list */
 319         list_for_each_entry(nsdata, &local->interfaces, list) {
 320                 if (nsdata != sdata && ieee80211_sdata_running(nsdata)) {
 321                         /*
 322                          * Only OCB and monitor mode may coexist
 323                          */
 324                         if ((sdata->vif.type == NL80211_IFTYPE_OCB &&
 325                              nsdata->vif.type != NL80211_IFTYPE_MONITOR) ||
 326                             (sdata->vif.type != NL80211_IFTYPE_MONITOR &&
 327                              nsdata->vif.type == NL80211_IFTYPE_OCB))
 328                                 return -EBUSY;
 329
 330                         /*
 331                          * Allow only a single IBSS interface to be up at any
 332                          * time. This is restricted because beacon distribution
 333                          * cannot work properly if both are in the same IBSS.
 334                          *
 335                          * To remove this restriction we'd have to disallow them
 336                          * from setting the same SSID on different IBSS interfaces
 337                          * belonging to the same hardware. Then, however, we're
 338                          * faced with having to adopt two different TSF timers...
 339                          */
 340                         if (iftype == NL80211_IFTYPE_ADHOC &&
 341                             nsdata->vif.type == NL80211_IFTYPE_ADHOC)
 342                                 return -EBUSY;
 343                         /*
 344                          * will not add another interface while any channel
 345                          * switch is active.
 346                          */
 347                         if (nsdata->vif.bss_conf.csa_active)
 348                                 return -EBUSY;
 349
 350                         /*
 351                          * The remaining checks are only performed for interfaces
 352                          * with the same MAC address.
 353                          */
 354                         if (!ether_addr_equal(sdata->vif.addr,
 355                                               nsdata->vif.addr))
 356                                 continue;
 357
 358                         /*
 359                          * check whether it may have the same address
 360                          */
 361                         if (!identical_mac_addr_allowed(iftype,
 362                                                         nsdata->vif.type))
 363                                 return -ENOTUNIQ;
 364
 365                         /* No support for VLAN with MLO yet */
 366                         if (iftype == NL80211_IFTYPE_AP_VLAN &&
 367                             sdata->wdev.use_4addr &&
 368                             nsdata->vif.type == NL80211_IFTYPE_AP &&
 369                             nsdata->vif.valid_links)
 370                                 return -EOPNOTSUPP;
 371
 372                         /*
 373                          * can only add VLANs to enabled APs
 374                          */
 375                         if (iftype == NL80211_IFTYPE_AP_VLAN &&
 376                             nsdata->vif.type == NL80211_IFTYPE_AP)
 377                                 sdata->bss = &nsdata->u.ap;
 378                 }
 379         }
 380
 381         mutex_lock(&local->chanctx_mtx);
 382         ret = ieee80211_check_combinations(sdata, NULL, 0, 0);
 383         mutex_unlock(&local->chanctx_mtx);
 384         return ret;
 385 }
 386
 387 static int ieee80211_check_queues(struct ieee80211_sub_if_data *sdata,
 388                                   enum nl80211_iftype iftype)
 389 {
 390         int n_queues = sdata->local->hw.queues;
 391         int i;
 392
 393         if (iftype == NL80211_IFTYPE_NAN)
 394                 return 0;
 395
 396         if (iftype != NL80211_IFTYPE_P2P_DEVICE) {
 397                 for (i = 0; i < IEEE80211_NUM_ACS; i++) {
 398                         if (WARN_ON_ONCE(sdata->vif.hw_queue[i] ==
 399                                          IEEE80211_INVAL_HW_QUEUE))
 400                                 return -EINVAL;
 401                         if (WARN_ON_ONCE(sdata->vif.hw_queue[i] >=
 402                                          n_queues))
 403                                 return -EINVAL;
 404                 }
 405         }
 406
 407         if ((iftype != NL80211_IFTYPE_AP &&
 408              iftype != NL80211_IFTYPE_P2P_GO &&
 409              iftype != NL80211_IFTYPE_MESH_POINT) ||
 410             !ieee80211_hw_check(&sdata->local->hw, QUEUE_CONTROL)) {
 411                 sdata->vif.cab_queue = IEEE80211_INVAL_HW_QUEUE;
 412                 return 0;
 413         }
 414
 415         if (WARN_ON_ONCE(sdata->vif.cab_queue == IEEE80211_INVAL_HW_QUEUE))
 416                 return -EINVAL;
 417
 418         if (WARN_ON_ONCE(sdata->vif.cab_queue >= n_queues))
 419                 return -EINVAL;
 420
 421         return 0;
 422 }
 423
 424 static int ieee80211_open(struct net_device *dev)
 425 {
 426         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 427         int err;
 428
 429         /* fail early if user set an invalid address */
 430         if (!is_valid_ether_addr(dev->dev_addr))
 431                 return -EADDRNOTAVAIL;
 432
 433         err = ieee80211_check_concurrent_iface(sdata, sdata->vif.type);
 434         if (err)
 435                 return err;
 436
 437         wiphy_lock(sdata->local->hw.wiphy);
 438         err = ieee80211_do_open(&sdata->wdev, true);
 439         wiphy_unlock(sdata->local->hw.wiphy);
 440
 441         return err;
 442 }
 443
 444 static void ieee80211_do_stop(struct ieee80211_sub_if_data *sdata, bool going_down)
 445 {
 446         struct ieee80211_local *local = sdata->local;
 447         unsigned long flags;
 448         struct sk_buff *skb, *tmp;
 449         u32 hw_reconf_flags = 0;
 450         int i, flushed;
 451         struct ps_data *ps;
 452         struct cfg80211_chan_def chandef;
 453         bool cancel_scan;
 454         struct cfg80211_nan_func *func;
 455
 456         clear_bit(SDATA_STATE_RUNNING, &sdata->state);
 457         synchronize_rcu(); /* flush _ieee80211_wake_txqs() */
 458
 459         cancel_scan = rcu_access_pointer(local->scan_sdata) == sdata;
 460         if (cancel_scan)
 461                 ieee80211_scan_cancel(local);
 462
 463         /*
 464          * Stop TX on this interface first.
 465          */
 466         if (!local->ops->wake_tx_queue && sdata->dev)
 467                 netif_tx_stop_all_queues(sdata->dev);
 468
 469         ieee80211_roc_purge(local, sdata);
 470
 471         switch (sdata->vif.type) {
 472         case NL80211_IFTYPE_STATION:
 473                 ieee80211_mgd_stop(sdata);
 474                 break;
 475         case NL80211_IFTYPE_ADHOC:
 476                 ieee80211_ibss_stop(sdata);
 477                 break;
 478         case NL80211_IFTYPE_MONITOR:
 479                 if (sdata->u.mntr.flags & MONITOR_FLAG_COOK_FRAMES)
 480                         break;
 481                 list_del_rcu(&sdata->u.mntr.list);
 482                 break;
 483         default:
 484                 break;
 485         }
 486
 487         /*
 488          * Remove all stations associated with this interface.
 489          *
 490          * This must be done before calling ops->remove_interface()
 491          * because otherwise we can later invoke ops->sta_notify()
 492          * whenever the STAs are removed, and that invalidates driver
 493          * assumptions about always getting a vif pointer that is valid
 494          * (because if we remove a STA after ops->remove_interface()
 495          * the driver will have removed the vif info already!)
 496          *
 497          * For AP_VLANs stations may exist since there's nothing else that
 498          * would have removed them, but in other modes there shouldn't
 499          * be any stations.
 500          */
 501         flushed = sta_info_flush(sdata);
 502         WARN_ON_ONCE(sdata->vif.type != NL80211_IFTYPE_AP_VLAN && flushed > 0);
 503
 504         /* don't count this interface for allmulti while it is down */
 505         if (sdata->flags & IEEE80211_SDATA_ALLMULTI)
 506                 atomic_dec(&local->iff_allmultis);
 507
 508         if (sdata->vif.type == NL80211_IFTYPE_AP) {
 509                 local->fif_pspoll--;
 510                 local->fif_probe_req--;
 511         } else if (sdata->vif.type == NL80211_IFTYPE_ADHOC) {
 512                 local->fif_probe_req--;
 513         }
 514
 515         if (sdata->dev) {
 516                 netif_addr_lock_bh(sdata->dev);
 517                 spin_lock_bh(&local->filter_lock);
 518                 __hw_addr_unsync(&local->mc_list, &sdata->dev->mc,
 519                                  sdata->dev->addr_len);
 520                 spin_unlock_bh(&local->filter_lock);
 521                 netif_addr_unlock_bh(sdata->dev);
 522         }
 523
 524         del_timer_sync(&local->dynamic_ps_timer);
 525         cancel_work_sync(&local->dynamic_ps_enable_work);
 526
 527         cancel_work_sync(&sdata->recalc_smps);
 528
 529         sdata_lock(sdata);
 530         WARN(sdata->vif.valid_links,
 531              "destroying interface with valid links 0x%04x\n",
 532              sdata->vif.valid_links);
 533
 534         mutex_lock(&local->mtx);
 535         sdata->vif.bss_conf.csa_active = false;
 536         if (sdata->vif.type == NL80211_IFTYPE_STATION)
 537                 sdata->deflink.u.mgd.csa_waiting_bcn = false;
 538         if (sdata->deflink.csa_block_tx) {
 539                 ieee80211_wake_vif_queues(local, sdata,
 540                                           IEEE80211_QUEUE_STOP_REASON_CSA);
 541                 sdata->deflink.csa_block_tx = false;
 542         }
 543         mutex_unlock(&local->mtx);
 544         sdata_unlock(sdata);
 545
 546         cancel_work_sync(&sdata->deflink.csa_finalize_work);
 547         cancel_work_sync(&sdata->deflink.color_change_finalize_work);
 548
 549         cancel_delayed_work_sync(&sdata->deflink.dfs_cac_timer_work);
 550
 551         if (sdata->wdev.cac_started) {
 552                 chandef = sdata->vif.bss_conf.chandef;
 553                 WARN_ON(local->suspended);
 554                 mutex_lock(&local->mtx);
 555                 ieee80211_link_release_channel(&sdata->deflink);
 556                 mutex_unlock(&local->mtx);
 557                 cfg80211_cac_event(sdata->dev, &chandef,
 558                                    NL80211_RADAR_CAC_ABORTED,
 559                                    GFP_KERNEL);
 560         }
 561
 562         if (sdata->vif.type == NL80211_IFTYPE_AP) {
 563                 WARN_ON(!list_empty(&sdata->u.ap.vlans));
 564         } else if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
 565                 /* remove all packets in parent bc_buf pointing to this dev */
 566                 ps = &sdata->bss->ps;
 567
 568                 spin_lock_irqsave(&ps->bc_buf.lock, flags);
 569                 skb_queue_walk_safe(&ps->bc_buf, skb, tmp) {
 570                         if (skb->dev == sdata->dev) {
 571                                 __skb_unlink(skb, &ps->bc_buf);
 572                                 local->total_ps_buffered--;
 573                                 ieee80211_free_txskb(&local->hw, skb);
 574                         }
 575                 }
 576                 spin_unlock_irqrestore(&ps->bc_buf.lock, flags);
 577         }
 578
 579         if (going_down)
 580                 local->open_count--;
 581
 582         switch (sdata->vif.type) {
 583         case NL80211_IFTYPE_AP_VLAN:
 584                 mutex_lock(&local->mtx);
 585                 list_del(&sdata->u.vlan.list);
 586                 mutex_unlock(&local->mtx);
 587                 RCU_INIT_POINTER(sdata->vif.bss_conf.chanctx_conf, NULL);
 588                 /* see comment in the default case below */
 589                 ieee80211_free_keys(sdata, true);
 590                 /* no need to tell driver */
 591                 break;
 592         case NL80211_IFTYPE_MONITOR:
 593                 if (sdata->u.mntr.flags & MONITOR_FLAG_COOK_FRAMES) {
 594                         local->cooked_mntrs--;
 595                         break;
 596                 }
 597
 598                 local->monitors--;
 599                 if (local->monitors == 0) {
 600                         local->hw.conf.flags &= ~IEEE80211_CONF_MONITOR;
 601                         hw_reconf_flags |= IEEE80211_CONF_CHANGE_MONITOR;
 602                 }
 603
 604                 ieee80211_adjust_monitor_flags(sdata, -1);
 605                 break;
 606         case NL80211_IFTYPE_NAN:
 607                 /* clean all the functions */
 608                 spin_lock_bh(&sdata->u.nan.func_lock);
 609
 610                 idr_for_each_entry(&sdata->u.nan.function_inst_ids, func, i) {
 611                         idr_remove(&sdata->u.nan.function_inst_ids, i);
 612                         cfg80211_free_nan_func(func);
 613                 }
 614                 idr_destroy(&sdata->u.nan.function_inst_ids);
 615
 616                 spin_unlock_bh(&sdata->u.nan.func_lock);
 617                 break;
 618         case NL80211_IFTYPE_P2P_DEVICE:
 619                 /* relies on synchronize_rcu() below */
 620                 RCU_INIT_POINTER(local->p2p_sdata, NULL);
 621                 fallthrough;
 622         default:
 623                 cancel_work_sync(&sdata->work);
 624                 /*
 625                  * When we get here, the interface is marked down.
 626                  * Free the remaining keys, if there are any
 627                  * (which can happen in AP mode if userspace sets
 628                  * keys before the interface is operating)
 629                  *
 630                  * Force the key freeing to always synchronize_net()
 631                  * to wait for the RX path in case it is using this
 632                  * interface enqueuing frames at this very time on
 633                  * another CPU.
 634                  */
 635                 ieee80211_free_keys(sdata, true);
 636                 skb_queue_purge(&sdata->skb_queue);
 637                 skb_queue_purge(&sdata->status_queue);
 638         }
 639
 640         spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
 641         for (i = 0; i < IEEE80211_MAX_QUEUES; i++) {
 642                 skb_queue_walk_safe(&local->pending[i], skb, tmp) {
 643                         struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
 644                         if (info->control.vif == &sdata->vif) {
 645                                 __skb_unlink(skb, &local->pending[i]);
 646                                 ieee80211_free_txskb(&local->hw, skb);
 647                         }
 648                 }
 649         }
 650         spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
 651
 652         if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
 653                 ieee80211_txq_remove_vlan(local, sdata);
 654
 655         sdata->bss = NULL;
 656
 657         if (local->open_count == 0)
 658                 ieee80211_clear_tx_pending(local);
 659
 660         sdata->vif.bss_conf.beacon_int = 0;
 661
 662         /*
 663          * If the interface goes down while suspended, presumably because
 664          * the device was unplugged and that happens before our resume,
 665          * then the driver is already unconfigured and the remainder of
 666          * this function isn't needed.
 667          * XXX: what about WoWLAN? If the device has software state, e.g.
 668          *      memory allocated, it might expect teardown commands from
 669          *      mac80211 here?
 670          */
 671         if (local->suspended) {
 672                 WARN_ON(local->wowlan);
 673                 WARN_ON(rcu_access_pointer(local->monitor_sdata));
 674                 return;
 675         }
 676
 677         switch (sdata->vif.type) {
 678         case NL80211_IFTYPE_AP_VLAN:
 679                 break;
 680         case NL80211_IFTYPE_MONITOR:
 681                 if (local->monitors == 0)
 682                         ieee80211_del_virtual_monitor(local);
 683
 684                 mutex_lock(&local->mtx);
 685                 ieee80211_recalc_idle(local);
 686                 mutex_unlock(&local->mtx);
 687
 688                 if (!(sdata->u.mntr.flags & MONITOR_FLAG_ACTIVE))
 689                         break;
 690
 691                 fallthrough;
 692         default:
 693                 if (going_down)
 694                         drv_remove_interface(local, sdata);
 695         }
 696
 697         ieee80211_recalc_ps(local);
 698
 699         if (cancel_scan)
 700                 wiphy_delayed_work_flush(local->hw.wiphy, &local->scan_work);
 701
 702         if (local->open_count == 0) {
 703                 ieee80211_stop_device(local);
 704
 705                 /* no reconfiguring after stop! */
 706                 return;
 707         }
 708
 709         /* do after stop to avoid reconfiguring when we stop anyway */
 710         ieee80211_configure_filter(local);
 711         ieee80211_hw_config(local, hw_reconf_flags);
 712
 713         if (local->monitors == local->open_count)
 714                 ieee80211_add_virtual_monitor(local);
 715 }
 716
 717 static void ieee80211_stop_mbssid(struct ieee80211_sub_if_data *sdata)
 718 {
 719         struct ieee80211_sub_if_data *tx_sdata, *non_tx_sdata, *tmp_sdata;
 720         struct ieee80211_vif *tx_vif = sdata->vif.mbssid_tx_vif;
 721
 722         if (!tx_vif)
 723                 return;
 724
 725         tx_sdata = vif_to_sdata(tx_vif);
 726         sdata->vif.mbssid_tx_vif = NULL;
 727
 728         list_for_each_entry_safe(non_tx_sdata, tmp_sdata,
 729                                  &tx_sdata->local->interfaces, list) {
 730                 if (non_tx_sdata != sdata && non_tx_sdata != tx_sdata &&
 731                     non_tx_sdata->vif.mbssid_tx_vif == tx_vif &&
 732                     ieee80211_sdata_running(non_tx_sdata)) {
 733                         non_tx_sdata->vif.mbssid_tx_vif = NULL;
 734                         dev_close(non_tx_sdata->wdev.netdev);
 735                 }
 736         }
 737
 738         if (sdata != tx_sdata && ieee80211_sdata_running(tx_sdata)) {
 739                 tx_sdata->vif.mbssid_tx_vif = NULL;
 740                 dev_close(tx_sdata->wdev.netdev);
 741         }
 742 }
 743
 744 static int ieee80211_stop(struct net_device *dev)
 745 {
 746         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 747
 748         /* close dependent VLAN and MBSSID interfaces before locking wiphy */
 749         if (sdata->vif.type == NL80211_IFTYPE_AP) {
 750                 struct ieee80211_sub_if_data *vlan, *tmpsdata;
 751
 752                 list_for_each_entry_safe(vlan, tmpsdata, &sdata->u.ap.vlans,
 753                                          u.vlan.list)
 754                         dev_close(vlan->dev);
 755
 756                 ieee80211_stop_mbssid(sdata);
 757         }
 758
 759         cancel_work_sync(&sdata->activate_links_work);
 760
 761         wiphy_lock(sdata->local->hw.wiphy);
 762         ieee80211_do_stop(sdata, true);
 763         wiphy_unlock(sdata->local->hw.wiphy);
 764
 765         return 0;
 766 }
 767
 768 static void ieee80211_set_multicast_list(struct net_device *dev)
 769 {
 770         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 771         struct ieee80211_local *local = sdata->local;
 772         int allmulti, sdata_allmulti;
 773
 774         allmulti = !!(dev->flags & IFF_ALLMULTI);
 775         sdata_allmulti = !!(sdata->flags & IEEE80211_SDATA_ALLMULTI);
 776
 777         if (allmulti != sdata_allmulti) {
 778                 if (dev->flags & IFF_ALLMULTI)
 779                         atomic_inc(&local->iff_allmultis);
 780                 else
 781                         atomic_dec(&local->iff_allmultis);
 782                 sdata->flags ^= IEEE80211_SDATA_ALLMULTI;
 783         }
 784
 785         spin_lock_bh(&local->filter_lock);
 786         __hw_addr_sync(&local->mc_list, &dev->mc, dev->addr_len);
 787         spin_unlock_bh(&local->filter_lock);
 788         ieee80211_queue_work(&local->hw, &local->reconfig_filter);
 789 }
 790
 791 /*
 792  * Called when the netdev is removed or, by the code below, before
 793  * the interface type changes.
 794  */
 795 static void ieee80211_teardown_sdata(struct ieee80211_sub_if_data *sdata)
 796 {
 797         /* free extra data */
 798         ieee80211_free_keys(sdata, false);
 799
 800         ieee80211_debugfs_remove_netdev(sdata);
 801
 802         ieee80211_destroy_frag_cache(&sdata->frags);
 803
 804         if (ieee80211_vif_is_mesh(&sdata->vif))
 805                 ieee80211_mesh_teardown_sdata(sdata);
 806
 807         ieee80211_vif_clear_links(sdata);
 808         ieee80211_link_stop(&sdata->deflink);
 809 }
 810
 811 static void ieee80211_uninit(struct net_device *dev)
 812 {
 813         ieee80211_teardown_sdata(IEEE80211_DEV_TO_SUB_IF(dev));
 814 }
 815
 816 static u16 ieee80211_netdev_select_queue(struct net_device *dev,
 817                                          struct sk_buff *skb,
 818                                          struct net_device *sb_dev)
 819 {
 820         return ieee80211_select_queue(IEEE80211_DEV_TO_SUB_IF(dev), skb);
 821 }
 822
 823 static void
 824 ieee80211_get_stats64(struct net_device *dev, struct rtnl_link_stats64 *stats)
 825 {
 826         dev_fetch_sw_netstats(stats, dev->tstats);
 827 }
 828
 829 static const struct net_device_ops ieee80211_dataif_ops = {
 830         .ndo_open               = ieee80211_open,
 831         .ndo_stop               = ieee80211_stop,
 832         .ndo_uninit             = ieee80211_uninit,
 833         .ndo_start_xmit         = ieee80211_subif_start_xmit,
 834         .ndo_set_rx_mode        = ieee80211_set_multicast_list,
 835         .ndo_set_mac_address    = ieee80211_change_mac,
 836         .ndo_select_queue       = ieee80211_netdev_select_queue,
 837         .ndo_get_stats64        = ieee80211_get_stats64,
 838 };
 839
 840 static u16 ieee80211_monitor_select_queue(struct net_device *dev,
 841                                           struct sk_buff *skb,
 842                                           struct net_device *sb_dev)
 843 {
 844         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 845         struct ieee80211_local *local = sdata->local;
 846         struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
 847         struct ieee80211_hdr *hdr;
 848         int len_rthdr;
 849
 850         if (local->hw.queues < IEEE80211_NUM_ACS)
 851                 return 0;
 852
 853         /* reset flags and info before parsing radiotap header */
 854         memset(info, 0, sizeof(*info));
 855
 856         if (!ieee80211_parse_tx_radiotap(skb, dev))
 857                 return 0; /* doesn't matter, frame will be dropped */
 858
 859         len_rthdr = ieee80211_get_radiotap_len(skb->data);
 860         hdr = (struct ieee80211_hdr *)(skb->data + len_rthdr);
 861         if (skb->len < len_rthdr + 2 ||
 862             skb->len < len_rthdr + ieee80211_hdrlen(hdr->frame_control))
 863                 return 0; /* doesn't matter, frame will be dropped */
 864
 865         return ieee80211_select_queue_80211(sdata, skb, hdr);
 866 }
 867
 868 static const struct net_device_ops ieee80211_monitorif_ops = {
 869         .ndo_open               = ieee80211_open,
 870         .ndo_stop               = ieee80211_stop,
 871         .ndo_uninit             = ieee80211_uninit,
 872         .ndo_start_xmit         = ieee80211_monitor_start_xmit,
 873         .ndo_set_rx_mode        = ieee80211_set_multicast_list,
 874         .ndo_set_mac_address    = ieee80211_change_mac,
 875         .ndo_select_queue       = ieee80211_monitor_select_queue,
 876         .ndo_get_stats64        = ieee80211_get_stats64,
 877 };
 878
 879 static int ieee80211_netdev_fill_forward_path(struct net_device_path_ctx *ctx,
 880                                               struct net_device_path *path)
 881 {
 882         struct ieee80211_sub_if_data *sdata;
 883         struct ieee80211_local *local;
 884         struct sta_info *sta;
 885         int ret = -ENOENT;
 886
 887         sdata = IEEE80211_DEV_TO_SUB_IF(ctx->dev);
 888         local = sdata->local;
 889
 890         if (!local->ops->net_fill_forward_path)
 891                 return -EOPNOTSUPP;
 892
 893         rcu_read_lock();
 894         switch (sdata->vif.type) {
 895         case NL80211_IFTYPE_AP_VLAN:
 896                 sta = rcu_dereference(sdata->u.vlan.sta);
 897                 if (sta)
 898                         break;
 899                 if (sdata->wdev.use_4addr)
 900                         goto out;
 901                 if (is_multicast_ether_addr(ctx->daddr))
 902                         goto out;
 903                 sta = sta_info_get_bss(sdata, ctx->daddr);
 904                 break;
 905         case NL80211_IFTYPE_AP:
 906                 if (is_multicast_ether_addr(ctx->daddr))
 907                         goto out;
 908                 sta = sta_info_get(sdata, ctx->daddr);
 909                 break;
 910         case NL80211_IFTYPE_STATION:
 911                 if (sdata->wdev.wiphy->flags & WIPHY_FLAG_SUPPORTS_TDLS) {
 912                         sta = sta_info_get(sdata, ctx->daddr);
 913                         if (sta && test_sta_flag(sta, WLAN_STA_TDLS_PEER)) {
 914                                 if (!test_sta_flag(sta, WLAN_STA_TDLS_PEER_AUTH))
 915                                         goto out;
 916
 917                                 break;
 918                         }
 919                 }
 920
 921                 sta = sta_info_get(sdata, sdata->deflink.u.mgd.bssid);
 922                 break;
 923         default:
 924                 goto out;
 925         }
 926
 927         if (!sta)
 928                 goto out;
 929
 930         ret = drv_net_fill_forward_path(local, sdata, &sta->sta, ctx, path);
 931 out:
 932         rcu_read_unlock();
 933
 934         return ret;
 935 }
 936
 937 static const struct net_device_ops ieee80211_dataif_8023_ops = {
 938         .ndo_open               = ieee80211_open,
 939         .ndo_stop               = ieee80211_stop,
 940         .ndo_uninit             = ieee80211_uninit,
 941         .ndo_start_xmit         = ieee80211_subif_start_xmit_8023,
 942         .ndo_set_rx_mode        = ieee80211_set_multicast_list,
 943         .ndo_set_mac_address    = ieee80211_change_mac,
 944         .ndo_select_queue       = ieee80211_netdev_select_queue,
 945         .ndo_get_stats64        = ieee80211_get_stats64,
 946         .ndo_fill_forward_path  = ieee80211_netdev_fill_forward_path,
 947 };
 948
 949 static bool ieee80211_iftype_supports_hdr_offload(enum nl80211_iftype iftype)
 950 {
 951         switch (iftype) {
 952         /* P2P GO and client are mapped to AP/STATION types */
 953         case NL80211_IFTYPE_AP:
 954         case NL80211_IFTYPE_STATION:
 955                 return true;
 956         default:
 957                 return false;
 958         }
 959 }
 960
 961 static bool ieee80211_set_sdata_offload_flags(struct ieee80211_sub_if_data *sdata)
 962 {
 963         struct ieee80211_local *local = sdata->local;
 964         u32 flags;
 965
 966         flags = sdata->vif.offload_flags;
 967
 968         if (ieee80211_hw_check(&local->hw, SUPPORTS_TX_ENCAP_OFFLOAD) &&
 969             ieee80211_iftype_supports_hdr_offload(sdata->vif.type)) {
 970                 flags |= IEEE80211_OFFLOAD_ENCAP_ENABLED;
 971
 972                 if (!ieee80211_hw_check(&local->hw, SUPPORTS_TX_FRAG) &&
 973                     local->hw.wiphy->frag_threshold != (u32)-1)
 974                         flags &= ~IEEE80211_OFFLOAD_ENCAP_ENABLED;
 975
 976                 if (local->monitors)
 977                         flags &= ~IEEE80211_OFFLOAD_ENCAP_ENABLED;
 978         } else {
 979                 flags &= ~IEEE80211_OFFLOAD_ENCAP_ENABLED;
 980         }
 981
 982         if (ieee80211_hw_check(&local->hw, SUPPORTS_RX_DECAP_OFFLOAD) &&
 983             ieee80211_iftype_supports_hdr_offload(sdata->vif.type)) {
 984                 flags |= IEEE80211_OFFLOAD_DECAP_ENABLED;
 985
 986                 if (local->monitors &&
 987                     !ieee80211_hw_check(&local->hw, SUPPORTS_CONC_MON_RX_DECAP))
 988                         flags &= ~IEEE80211_OFFLOAD_DECAP_ENABLED;
 989         } else {
 990                 flags &= ~IEEE80211_OFFLOAD_DECAP_ENABLED;
 991         }
 992
 993         if (sdata->vif.offload_flags == flags)
 994                 return false;
 995
 996         sdata->vif.offload_flags = flags;
 997         ieee80211_check_fast_rx_iface(sdata);
 998         return true;
 999 }
1000
1001 static void ieee80211_set_vif_encap_ops(struct ieee80211_sub_if_data *sdata)
1002 {
1003         struct ieee80211_local *local = sdata->local;
1004         struct ieee80211_sub_if_data *bss = sdata;
1005         bool enabled;
1006
1007         if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
1008                 if (!sdata->bss)
1009                         return;
1010
1011                 bss = container_of(sdata->bss, struct ieee80211_sub_if_data, u.ap);
1012         }
1013
1014         if (!ieee80211_hw_check(&local->hw, SUPPORTS_TX_ENCAP_OFFLOAD) ||
1015             !ieee80211_iftype_supports_hdr_offload(bss->vif.type))
1016                 return;
1017
1018         enabled = bss->vif.offload_flags & IEEE80211_OFFLOAD_ENCAP_ENABLED;
1019         if (sdata->wdev.use_4addr &&
1020             !(bss->vif.offload_flags & IEEE80211_OFFLOAD_ENCAP_4ADDR))
1021                 enabled = false;
1022
1023         sdata->dev->netdev_ops = enabled ? &ieee80211_dataif_8023_ops :
1024                                            &ieee80211_dataif_ops;
1025 }
1026
1027 static void ieee80211_recalc_sdata_offload(struct ieee80211_sub_if_data *sdata)
1028 {
1029         struct ieee80211_local *local = sdata->local;
1030         struct ieee80211_sub_if_data *vsdata;
1031
1032         if (ieee80211_set_sdata_offload_flags(sdata)) {
1033                 drv_update_vif_offload(local, sdata);
1034                 ieee80211_set_vif_encap_ops(sdata);
1035         }
1036
1037         list_for_each_entry(vsdata, &local->interfaces, list) {
1038                 if (vsdata->vif.type != NL80211_IFTYPE_AP_VLAN ||
1039                     vsdata->bss != &sdata->u.ap)
1040                         continue;
1041
1042                 ieee80211_set_vif_encap_ops(vsdata);
1043         }
1044 }
1045
1046 void ieee80211_recalc_offload(struct ieee80211_local *local)
1047 {
1048         struct ieee80211_sub_if_data *sdata;
1049
1050         if (!ieee80211_hw_check(&local->hw, SUPPORTS_TX_ENCAP_OFFLOAD))
1051                 return;
1052
1053         mutex_lock(&local->iflist_mtx);
1054
1055         list_for_each_entry(sdata, &local->interfaces, list) {
1056                 if (!ieee80211_sdata_running(sdata))
1057                         continue;
1058
1059                 ieee80211_recalc_sdata_offload(sdata);
1060         }
1061
1062         mutex_unlock(&local->iflist_mtx);
1063 }
1064
1065 void ieee80211_adjust_monitor_flags(struct ieee80211_sub_if_data *sdata,
1066                                     const int offset)
1067 {
1068         struct ieee80211_local *local = sdata->local;
1069         u32 flags = sdata->u.mntr.flags;
1070
1071 #define ADJUST(_f, _s)  do {                                    \
1072         if (flags & MONITOR_FLAG_##_f)                          \
1073                 local->fif_##_s += offset;                      \
1074         } while (0)
1075
1076         ADJUST(FCSFAIL, fcsfail);
1077         ADJUST(PLCPFAIL, plcpfail);
1078         ADJUST(CONTROL, control);
1079         ADJUST(CONTROL, pspoll);
1080         ADJUST(OTHER_BSS, other_bss);
1081
1082 #undef ADJUST
1083 }
1084
1085 static void ieee80211_set_default_queues(struct ieee80211_sub_if_data *sdata)
1086 {
1087         struct ieee80211_local *local = sdata->local;
1088         int i;
1089
1090         for (i = 0; i < IEEE80211_NUM_ACS; i++) {
1091                 if (ieee80211_hw_check(&local->hw, QUEUE_CONTROL))
1092                         sdata->vif.hw_queue[i] = IEEE80211_INVAL_HW_QUEUE;
1093                 else if (local->hw.queues >= IEEE80211_NUM_ACS)
1094                         sdata->vif.hw_queue[i] = i;
1095                 else
1096                         sdata->vif.hw_queue[i] = 0;
1097         }
1098         sdata->vif.cab_queue = IEEE80211_INVAL_HW_QUEUE;
1099 }
1100
1101 static void ieee80211_sdata_init(struct ieee80211_local *local,
1102                                  struct ieee80211_sub_if_data *sdata)
1103 {
1104         sdata->local = local;
1105
1106         /*
1107          * Initialize the default link, so we can use link_id 0 for non-MLD,
1108          * and that continues to work for non-MLD-aware drivers that use just
1109          * vif.bss_conf instead of vif.link_conf.
1110          *
1111          * Note that we never change this, so if link ID 0 isn't used in an
1112          * MLD connection, we get a separate allocation for it.
1113          */
1114         ieee80211_link_init(sdata, -1, &sdata->deflink, &sdata->vif.bss_conf);
1115 }
1116
1117 int ieee80211_add_virtual_monitor(struct ieee80211_local *local)
1118 {
1119         struct ieee80211_sub_if_data *sdata;
1120         int ret;
1121
1122         if (!ieee80211_hw_check(&local->hw, WANT_MONITOR_VIF))
1123                 return 0;
1124
1125         ASSERT_RTNL();
1126         lockdep_assert_wiphy(local->hw.wiphy);
1127
1128         if (local->monitor_sdata)
1129                 return 0;
1130
1131         sdata = kzalloc(sizeof(*sdata) + local->hw.vif_data_size, GFP_KERNEL);
1132         if (!sdata)
1133                 return -ENOMEM;
1134
1135         /* set up data */
1136         sdata->vif.type = NL80211_IFTYPE_MONITOR;
1137         snprintf(sdata->name, IFNAMSIZ, "%s-monitor",
1138                  wiphy_name(local->hw.wiphy));
1139         sdata->wdev.iftype = NL80211_IFTYPE_MONITOR;
1140
1141         ieee80211_sdata_init(local, sdata);
1142
1143         ieee80211_set_default_queues(sdata);
1144
1145         ret = drv_add_interface(local, sdata);
1146         if (WARN_ON(ret)) {
1147                 /* ok .. stupid driver, it asked for this! */
1148                 kfree(sdata);
1149                 return ret;
1150         }
1151
1152         set_bit(SDATA_STATE_RUNNING, &sdata->state);
1153
1154         ret = ieee80211_check_queues(sdata, NL80211_IFTYPE_MONITOR);
1155         if (ret) {
1156                 kfree(sdata);
1157                 return ret;
1158         }
1159
1160         mutex_lock(&local->iflist_mtx);
1161         rcu_assign_pointer(local->monitor_sdata, sdata);
1162         mutex_unlock(&local->iflist_mtx);
1163
1164         mutex_lock(&local->mtx);
1165         ret = ieee80211_link_use_channel(&sdata->deflink, &local->monitor_chandef,
1166                                          IEEE80211_CHANCTX_EXCLUSIVE);
1167         mutex_unlock(&local->mtx);
1168         if (ret) {
1169                 mutex_lock(&local->iflist_mtx);
1170                 RCU_INIT_POINTER(local->monitor_sdata, NULL);
1171                 mutex_unlock(&local->iflist_mtx);
1172                 synchronize_net();
1173                 drv_remove_interface(local, sdata);
1174                 kfree(sdata);
1175                 return ret;
1176         }
1177
1178         skb_queue_head_init(&sdata->skb_queue);
1179         skb_queue_head_init(&sdata->status_queue);
1180         INIT_WORK(&sdata->work, ieee80211_iface_work);
1181
1182         return 0;
1183 }
1184
1185 void ieee80211_del_virtual_monitor(struct ieee80211_local *local)
1186 {
1187         struct ieee80211_sub_if_data *sdata;
1188
1189         if (!ieee80211_hw_check(&local->hw, WANT_MONITOR_VIF))
1190                 return;
1191
1192         ASSERT_RTNL();
1193         lockdep_assert_wiphy(local->hw.wiphy);
1194
1195         mutex_lock(&local->iflist_mtx);
1196
1197         sdata = rcu_dereference_protected(local->monitor_sdata,
1198                                           lockdep_is_held(&local->iflist_mtx));
1199         if (!sdata) {
1200                 mutex_unlock(&local->iflist_mtx);
1201                 return;
1202         }
1203
1204         RCU_INIT_POINTER(local->monitor_sdata, NULL);
1205         mutex_unlock(&local->iflist_mtx);
1206
1207         synchronize_net();
1208
1209         mutex_lock(&local->mtx);
1210         ieee80211_link_release_channel(&sdata->deflink);
1211         mutex_unlock(&local->mtx);
1212
1213         drv_remove_interface(local, sdata);
1214
1215         kfree(sdata);
1216 }
1217
1218 /*
1219  * NOTE: Be very careful when changing this function, it must NOT return
1220  * an error on interface type changes that have been pre-checked, so most
1221  * checks should be in ieee80211_check_concurrent_iface.
1222  */
1223 int ieee80211_do_open(struct wireless_dev *wdev, bool coming_up)
1224 {
1225         struct ieee80211_sub_if_data *sdata = IEEE80211_WDEV_TO_SUB_IF(wdev);
1226         struct net_device *dev = wdev->netdev;
1227         struct ieee80211_local *local = sdata->local;
1228         u32 changed = 0;
1229         int res;
1230         u32 hw_reconf_flags = 0;
1231
1232         switch (sdata->vif.type) {
1233         case NL80211_IFTYPE_AP_VLAN: {
1234                 struct ieee80211_sub_if_data *master;
1235
1236                 if (!sdata->bss)
1237                         return -ENOLINK;
1238
1239                 mutex_lock(&local->mtx);
1240                 list_add(&sdata->u.vlan.list, &sdata->bss->vlans);
1241                 mutex_unlock(&local->mtx);
1242
1243                 master = container_of(sdata->bss,
1244                                       struct ieee80211_sub_if_data, u.ap);
1245                 sdata->control_port_protocol =
1246                         master->control_port_protocol;
1247                 sdata->control_port_no_encrypt =
1248                         master->control_port_no_encrypt;
1249                 sdata->control_port_over_nl80211 =
1250                         master->control_port_over_nl80211;
1251                 sdata->control_port_no_preauth =
1252                         master->control_port_no_preauth;
1253                 sdata->vif.cab_queue = master->vif.cab_queue;
1254                 memcpy(sdata->vif.hw_queue, master->vif.hw_queue,
1255                        sizeof(sdata->vif.hw_queue));
1256                 sdata->vif.bss_conf.chandef = master->vif.bss_conf.chandef;
1257
1258                 mutex_lock(&local->key_mtx);
1259                 sdata->crypto_tx_tailroom_needed_cnt +=
1260                         master->crypto_tx_tailroom_needed_cnt;
1261                 mutex_unlock(&local->key_mtx);
1262
1263                 break;
1264                 }
1265         case NL80211_IFTYPE_AP:
1266                 sdata->bss = &sdata->u.ap;
1267                 break;
1268         case NL80211_IFTYPE_MESH_POINT:
1269         case NL80211_IFTYPE_STATION:
1270         case NL80211_IFTYPE_MONITOR:
1271         case NL80211_IFTYPE_ADHOC:
1272         case NL80211_IFTYPE_P2P_DEVICE:
1273         case NL80211_IFTYPE_OCB:
1274         case NL80211_IFTYPE_NAN:
1275                 /* no special treatment */
1276                 break;
1277         case NL80211_IFTYPE_UNSPECIFIED:
1278         case NUM_NL80211_IFTYPES:
1279         case NL80211_IFTYPE_P2P_CLIENT:
1280         case NL80211_IFTYPE_P2P_GO:
1281         case NL80211_IFTYPE_WDS:
1282                 /* cannot happen */
1283                 WARN_ON(1);
1284                 break;
1285         }
1286
1287         if (local->open_count == 0) {
1288                 res = drv_start(local);
1289                 if (res)
1290                         goto err_del_bss;
1291                 /* we're brought up, everything changes */
1292                 hw_reconf_flags = ~0;
1293                 ieee80211_led_radio(local, true);
1294                 ieee80211_mod_tpt_led_trig(local,
1295                                            IEEE80211_TPT_LEDTRIG_FL_RADIO, 0);
1296         }
1297
1298         /*
1299          * Copy the hopefully now-present MAC address to
1300          * this interface, if it has the special null one.
1301          */
1302         if (dev && is_zero_ether_addr(dev->dev_addr)) {
1303                 eth_hw_addr_set(dev, local->hw.wiphy->perm_addr);
1304                 memcpy(dev->perm_addr, dev->dev_addr, ETH_ALEN);
1305
1306                 if (!is_valid_ether_addr(dev->dev_addr)) {
1307                         res = -EADDRNOTAVAIL;
1308                         goto err_stop;
1309                 }
1310         }
1311
1312         switch (sdata->vif.type) {
1313         case NL80211_IFTYPE_AP_VLAN:
1314                 /* no need to tell driver, but set carrier and chanctx */
1315                 if (sdata->bss->active) {
1316                         ieee80211_link_vlan_copy_chanctx(&sdata->deflink);
1317                         netif_carrier_on(dev);
1318                         ieee80211_set_vif_encap_ops(sdata);
1319                 } else {
1320                         netif_carrier_off(dev);
1321                 }
1322                 break;
1323         case NL80211_IFTYPE_MONITOR:
1324                 if (sdata->u.mntr.flags & MONITOR_FLAG_COOK_FRAMES) {
1325                         local->cooked_mntrs++;
1326                         break;
1327                 }
1328
1329                 if (sdata->u.mntr.flags & MONITOR_FLAG_ACTIVE) {
1330                         res = drv_add_interface(local, sdata);
1331                         if (res)
1332                                 goto err_stop;
1333                 } else if (local->monitors == 0 && local->open_count == 0) {
1334                         res = ieee80211_add_virtual_monitor(local);
1335                         if (res)
1336                                 goto err_stop;
1337                 }
1338
1339                 /* must be before the call to ieee80211_configure_filter */
1340                 local->monitors++;
1341                 if (local->monitors == 1) {
1342                         local->hw.conf.flags |= IEEE80211_CONF_MONITOR;
1343                         hw_reconf_flags |= IEEE80211_CONF_CHANGE_MONITOR;
1344                 }
1345
1346                 ieee80211_adjust_monitor_flags(sdata, 1);
1347                 ieee80211_configure_filter(local);
1348                 ieee80211_recalc_offload(local);
1349                 mutex_lock(&local->mtx);
1350                 ieee80211_recalc_idle(local);
1351                 mutex_unlock(&local->mtx);
1352
1353                 netif_carrier_on(dev);
1354                 break;
1355         default:
1356                 if (coming_up) {
1357                         ieee80211_del_virtual_monitor(local);
1358                         ieee80211_set_sdata_offload_flags(sdata);
1359
1360                         res = drv_add_interface(local, sdata);
1361                         if (res)
1362                                 goto err_stop;
1363
1364                         ieee80211_set_vif_encap_ops(sdata);
1365                         res = ieee80211_check_queues(sdata,
1366                                 ieee80211_vif_type_p2p(&sdata->vif));
1367                         if (res)
1368                                 goto err_del_interface;
1369                 }
1370
1371                 if (sdata->vif.type == NL80211_IFTYPE_AP) {
1372                         local->fif_pspoll++;
1373                         local->fif_probe_req++;
1374
1375                         ieee80211_configure_filter(local);
1376                 } else if (sdata->vif.type == NL80211_IFTYPE_ADHOC) {
1377                         local->fif_probe_req++;
1378                 }
1379
1380                 if (sdata->vif.probe_req_reg)
1381                         drv_config_iface_filter(local, sdata,
1382                                                 FIF_PROBE_REQ,
1383                                                 FIF_PROBE_REQ);
1384
1385                 if (sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE &&
1386                     sdata->vif.type != NL80211_IFTYPE_NAN)
1387                         changed |= ieee80211_reset_erp_info(sdata);
1388                 ieee80211_link_info_change_notify(sdata, &sdata->deflink,
1389                                                   changed);
1390
1391                 switch (sdata->vif.type) {
1392                 case NL80211_IFTYPE_STATION:
1393                 case NL80211_IFTYPE_ADHOC:
1394                 case NL80211_IFTYPE_AP:
1395                 case NL80211_IFTYPE_MESH_POINT:
1396                 case NL80211_IFTYPE_OCB:
1397                         netif_carrier_off(dev);
1398                         break;
1399                 case NL80211_IFTYPE_P2P_DEVICE:
1400                 case NL80211_IFTYPE_NAN:
1401                         break;
1402                 default:
1403                         /* not reached */
1404                         WARN_ON(1);
1405                 }
1406
1407                 /*
1408                  * Set default queue parameters so drivers don't
1409                  * need to initialise the hardware if the hardware
1410                  * doesn't start up with sane defaults.
1411                  * Enable QoS for anything but station interfaces.
1412                  */
1413                 ieee80211_set_wmm_default(&sdata->deflink, true,
1414                         sdata->vif.type != NL80211_IFTYPE_STATION);
1415         }
1416
1417         switch (sdata->vif.type) {
1418         case NL80211_IFTYPE_P2P_DEVICE:
1419                 rcu_assign_pointer(local->p2p_sdata, sdata);
1420                 break;
1421         case NL80211_IFTYPE_MONITOR:
1422                 if (sdata->u.mntr.flags & MONITOR_FLAG_COOK_FRAMES)
1423                         break;
1424                 list_add_tail_rcu(&sdata->u.mntr.list, &local->mon_list);
1425                 break;
1426         default:
1427                 break;
1428         }
1429
1430         /*
1431          * set_multicast_list will be invoked by the networking core
1432          * which will check whether any increments here were done in
1433          * error and sync them down to the hardware as filter flags.
1434          */
1435         if (sdata->flags & IEEE80211_SDATA_ALLMULTI)
1436                 atomic_inc(&local->iff_allmultis);
1437
1438         if (coming_up)
1439                 local->open_count++;
1440
1441         if (hw_reconf_flags)
1442                 ieee80211_hw_config(local, hw_reconf_flags);
1443
1444         ieee80211_recalc_ps(local);
1445
1446         if (sdata->vif.type == NL80211_IFTYPE_MONITOR ||
1447             sdata->vif.type == NL80211_IFTYPE_AP_VLAN ||
1448             local->ops->wake_tx_queue) {
1449                 /* XXX: for AP_VLAN, actually track AP queues */
1450                 if (dev)
1451                         netif_tx_start_all_queues(dev);
1452         } else if (dev) {
1453                 unsigned long flags;
1454                 int n_acs = IEEE80211_NUM_ACS;
1455                 int ac;
1456
1457                 if (local->hw.queues < IEEE80211_NUM_ACS)
1458                         n_acs = 1;
1459
1460                 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
1461                 if (sdata->vif.cab_queue == IEEE80211_INVAL_HW_QUEUE ||
1462                     (local->queue_stop_reasons[sdata->vif.cab_queue] == 0 &&
1463                      skb_queue_empty(&local->pending[sdata->vif.cab_queue]))) {
1464                         for (ac = 0; ac < n_acs; ac++) {
1465                                 int ac_queue = sdata->vif.hw_queue[ac];
1466
1467                                 if (local->queue_stop_reasons[ac_queue] == 0 &&
1468                                     skb_queue_empty(&local->pending[ac_queue]))
1469                                         netif_start_subqueue(dev, ac);
1470                         }
1471                 }
1472                 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
1473         }
1474
1475         set_bit(SDATA_STATE_RUNNING, &sdata->state);
1476
1477         return 0;
1478  err_del_interface:
1479         drv_remove_interface(local, sdata);
1480  err_stop:
1481         if (!local->open_count)
1482                 drv_stop(local);
1483  err_del_bss:
1484         sdata->bss = NULL;
1485         if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
1486                 mutex_lock(&local->mtx);
1487                 list_del(&sdata->u.vlan.list);
1488                 mutex_unlock(&local->mtx);
1489         }
1490         /* might already be clear but that doesn't matter */
1491         clear_bit(SDATA_STATE_RUNNING, &sdata->state);
1492         return res;
1493 }
1494
1495 static void ieee80211_if_free(struct net_device *dev)
1496 {
1497         free_percpu(dev->tstats);
1498 }
1499
1500 static void ieee80211_if_setup(struct net_device *dev)
1501 {
1502         ether_setup(dev);
1503         dev->priv_flags &= ~IFF_TX_SKB_SHARING;
1504         dev->netdev_ops = &ieee80211_dataif_ops;
1505         dev->needs_free_netdev = true;
1506         dev->priv_destructor = ieee80211_if_free;
1507 }
1508
1509 static void ieee80211_if_setup_no_queue(struct net_device *dev)
1510 {
1511         ieee80211_if_setup(dev);
1512         dev->priv_flags |= IFF_NO_QUEUE;
1513 }
1514
1515 static void ieee80211_iface_process_skb(struct ieee80211_local *local,
1516                                         struct ieee80211_sub_if_data *sdata,
1517                                         struct sk_buff *skb)
1518 {
1519         struct ieee80211_mgmt *mgmt = (void *)skb->data;
1520
1521         if (ieee80211_is_action(mgmt->frame_control) &&
1522             mgmt->u.action.category == WLAN_CATEGORY_BACK) {
1523                 struct sta_info *sta;
1524                 int len = skb->len;
1525
1526                 mutex_lock(&local->sta_mtx);
1527                 sta = sta_info_get_bss(sdata, mgmt->sa);
1528                 if (sta) {
1529                         switch (mgmt->u.action.u.addba_req.action_code) {
1530                         case WLAN_ACTION_ADDBA_REQ:
1531                                 ieee80211_process_addba_request(local, sta,
1532                                                                 mgmt, len);
1533                                 break;
1534                         case WLAN_ACTION_ADDBA_RESP:
1535                                 ieee80211_process_addba_resp(local, sta,
1536                                                              mgmt, len);
1537                                 break;
1538                         case WLAN_ACTION_DELBA:
1539                                 ieee80211_process_delba(sdata, sta,
1540                                                         mgmt, len);
1541                                 break;
1542                         default:
1543                                 WARN_ON(1);
1544                                 break;
1545                         }
1546                 }
1547                 mutex_unlock(&local->sta_mtx);
1548         } else if (ieee80211_is_action(mgmt->frame_control) &&
1549                    mgmt->u.action.category == WLAN_CATEGORY_VHT) {
1550                 switch (mgmt->u.action.u.vht_group_notif.action_code) {
1551                 case WLAN_VHT_ACTION_OPMODE_NOTIF: {
1552                         struct ieee80211_rx_status *status;
1553                         enum nl80211_band band;
1554                         struct sta_info *sta;
1555                         u8 opmode;
1556
1557                         status = IEEE80211_SKB_RXCB(skb);
1558                         band = status->band;
1559                         opmode = mgmt->u.action.u.vht_opmode_notif.operating_mode;
1560
1561                         mutex_lock(&local->sta_mtx);
1562                         sta = sta_info_get_bss(sdata, mgmt->sa);
1563
1564                         if (sta)
1565                                 ieee80211_vht_handle_opmode(sdata,
1566                                                             &sta->deflink,
1567                                                             opmode, band);
1568
1569                         mutex_unlock(&local->sta_mtx);
1570                         break;
1571                 }
1572                 case WLAN_VHT_ACTION_GROUPID_MGMT:
1573                         ieee80211_process_mu_groups(sdata, &sdata->deflink,
1574                                                     mgmt);
1575                         break;
1576                 default:
1577                         WARN_ON(1);
1578                         break;
1579                 }
1580         } else if (ieee80211_is_action(mgmt->frame_control) &&
1581                    mgmt->u.action.category == WLAN_CATEGORY_S1G) {
1582                 switch (mgmt->u.action.u.s1g.action_code) {
1583                 case WLAN_S1G_TWT_TEARDOWN:
1584                 case WLAN_S1G_TWT_SETUP:
1585                         ieee80211_s1g_rx_twt_action(sdata, skb);
1586                         break;
1587                 default:
1588                         break;
1589                 }
1590         } else if (ieee80211_is_ext(mgmt->frame_control)) {
1591                 if (sdata->vif.type == NL80211_IFTYPE_STATION)
1592                         ieee80211_sta_rx_queued_ext(sdata, skb);
1593                 else
1594                         WARN_ON(1);
1595         } else if (ieee80211_is_data_qos(mgmt->frame_control)) {
1596                 struct ieee80211_hdr *hdr = (void *)mgmt;
1597                 struct sta_info *sta;
1598
1599                 /*
1600                  * So the frame isn't mgmt, but frame_control
1601                  * is at the right place anyway, of course, so
1602                  * the if statement is correct.
1603                  *
1604                  * Warn if we have other data frame types here,
1605                  * they must not get here.
1606                  */
1607                 WARN_ON(hdr->frame_control &
1608                                 cpu_to_le16(IEEE80211_STYPE_NULLFUNC));
1609                 WARN_ON(!(hdr->seq_ctrl &
1610                                 cpu_to_le16(IEEE80211_SCTL_FRAG)));
1611                 /*
1612                  * This was a fragment of a frame, received while
1613                  * a block-ack session was active. That cannot be
1614                  * right, so terminate the session.
1615                  */
1616                 mutex_lock(&local->sta_mtx);
1617                 sta = sta_info_get_bss(sdata, mgmt->sa);
1618                 if (sta) {
1619                         u16 tid = ieee80211_get_tid(hdr);
1620
1621                         __ieee80211_stop_rx_ba_session(
1622                                 sta, tid, WLAN_BACK_RECIPIENT,
1623                                 WLAN_REASON_QSTA_REQUIRE_SETUP,
1624                                 true);
1625                 }
1626                 mutex_unlock(&local->sta_mtx);
1627         } else switch (sdata->vif.type) {
1628         case NL80211_IFTYPE_STATION:
1629                 ieee80211_sta_rx_queued_mgmt(sdata, skb);
1630                 break;
1631         case NL80211_IFTYPE_ADHOC:
1632                 ieee80211_ibss_rx_queued_mgmt(sdata, skb);
1633                 break;
1634         case NL80211_IFTYPE_MESH_POINT:
1635                 if (!ieee80211_vif_is_mesh(&sdata->vif))
1636                         break;
1637                 ieee80211_mesh_rx_queued_mgmt(sdata, skb);
1638                 break;
1639         default:
1640                 WARN(1, "frame for unexpected interface type");
1641                 break;
1642         }
1643 }
1644
1645 static void ieee80211_iface_process_status(struct ieee80211_sub_if_data *sdata,
1646                                            struct sk_buff *skb)
1647 {
1648         struct ieee80211_mgmt *mgmt = (void *)skb->data;
1649
1650         if (ieee80211_is_action(mgmt->frame_control) &&
1651             mgmt->u.action.category == WLAN_CATEGORY_S1G) {
1652                 switch (mgmt->u.action.u.s1g.action_code) {
1653                 case WLAN_S1G_TWT_TEARDOWN:
1654                 case WLAN_S1G_TWT_SETUP:
1655                         ieee80211_s1g_status_twt_action(sdata, skb);
1656                         break;
1657                 default:
1658                         break;
1659                 }
1660         }
1661 }
1662
1663 static void ieee80211_iface_work(struct work_struct *work)
1664 {
1665         struct ieee80211_sub_if_data *sdata =
1666                 container_of(work, struct ieee80211_sub_if_data, work);
1667         struct ieee80211_local *local = sdata->local;
1668         struct sk_buff *skb;
1669
1670         if (!ieee80211_sdata_running(sdata))
1671                 return;
1672
1673         if (test_bit(SCAN_SW_SCANNING, &local->scanning))
1674                 return;
1675
1676         if (!ieee80211_can_run_worker(local))
1677                 return;
1678
1679         /* first process frames */
1680         while ((skb = skb_dequeue(&sdata->skb_queue))) {
1681                 kcov_remote_start_common(skb_get_kcov_handle(skb));
1682
1683                 if (skb->protocol == cpu_to_be16(ETH_P_TDLS))
1684                         ieee80211_process_tdls_channel_switch(sdata, skb);
1685                 else
1686                         ieee80211_iface_process_skb(local, sdata, skb);
1687
1688                 kfree_skb(skb);
1689                 kcov_remote_stop();
1690         }
1691
1692         /* process status queue */
1693         while ((skb = skb_dequeue(&sdata->status_queue))) {
1694                 kcov_remote_start_common(skb_get_kcov_handle(skb));
1695
1696                 ieee80211_iface_process_status(sdata, skb);
1697                 kfree_skb(skb);
1698
1699                 kcov_remote_stop();
1700         }
1701
1702         /* then other type-dependent work */
1703         switch (sdata->vif.type) {
1704         case NL80211_IFTYPE_STATION:
1705                 ieee80211_sta_work(sdata);
1706                 break;
1707         case NL80211_IFTYPE_ADHOC:
1708                 ieee80211_ibss_work(sdata);
1709                 break;
1710         case NL80211_IFTYPE_MESH_POINT:
1711                 if (!ieee80211_vif_is_mesh(&sdata->vif))
1712                         break;
1713                 ieee80211_mesh_work(sdata);
1714                 break;
1715         case NL80211_IFTYPE_OCB:
1716                 ieee80211_ocb_work(sdata);
1717                 break;
1718         default:
1719                 break;
1720         }
1721 }
1722
1723 static void ieee80211_recalc_smps_work(struct work_struct *work)
1724 {
1725         struct ieee80211_sub_if_data *sdata =
1726                 container_of(work, struct ieee80211_sub_if_data, recalc_smps);
1727
1728         ieee80211_recalc_smps(sdata, &sdata->deflink);
1729 }
1730
1731 static void ieee80211_activate_links_work(struct work_struct *work)
1732 {
1733         struct ieee80211_sub_if_data *sdata =
1734                 container_of(work, struct ieee80211_sub_if_data,
1735                              activate_links_work);
1736
1737         ieee80211_set_active_links(&sdata->vif, sdata->desired_active_links);
1738 }
1739
1740 /*
1741  * Helper function to initialise an interface to a specific type.
1742  */
1743 static void ieee80211_setup_sdata(struct ieee80211_sub_if_data *sdata,
1744                                   enum nl80211_iftype type)
1745 {
1746         static const u8 bssid_wildcard[ETH_ALEN] = {0xff, 0xff, 0xff,
1747                                                     0xff, 0xff, 0xff};
1748
1749         /* clear type-dependent unions */
1750         memset(&sdata->u, 0, sizeof(sdata->u));
1751         memset(&sdata->deflink.u, 0, sizeof(sdata->deflink.u));
1752
1753         /* and set some type-dependent values */
1754         sdata->vif.type = type;
1755         sdata->vif.p2p = false;
1756         sdata->wdev.iftype = type;
1757
1758         sdata->control_port_protocol = cpu_to_be16(ETH_P_PAE);
1759         sdata->control_port_no_encrypt = false;
1760         sdata->control_port_over_nl80211 = false;
1761         sdata->control_port_no_preauth = false;
1762         sdata->vif.cfg.idle = true;
1763         sdata->vif.bss_conf.txpower = INT_MIN; /* unset */
1764
1765         sdata->noack_map = 0;
1766
1767         /* only monitor/p2p-device differ */
1768         if (sdata->dev) {
1769                 sdata->dev->netdev_ops = &ieee80211_dataif_ops;
1770                 sdata->dev->type = ARPHRD_ETHER;
1771         }
1772
1773         skb_queue_head_init(&sdata->skb_queue);
1774         skb_queue_head_init(&sdata->status_queue);
1775         INIT_WORK(&sdata->work, ieee80211_iface_work);
1776         INIT_WORK(&sdata->recalc_smps, ieee80211_recalc_smps_work);
1777         INIT_WORK(&sdata->activate_links_work, ieee80211_activate_links_work);
1778
1779         switch (type) {
1780         case NL80211_IFTYPE_P2P_GO:
1781                 type = NL80211_IFTYPE_AP;
1782                 sdata->vif.type = type;
1783                 sdata->vif.p2p = true;
1784                 fallthrough;
1785         case NL80211_IFTYPE_AP:
1786                 skb_queue_head_init(&sdata->u.ap.ps.bc_buf);
1787                 INIT_LIST_HEAD(&sdata->u.ap.vlans);
1788                 sdata->vif.bss_conf.bssid = sdata->vif.addr;
1789                 break;
1790         case NL80211_IFTYPE_P2P_CLIENT:
1791                 type = NL80211_IFTYPE_STATION;
1792                 sdata->vif.type = type;
1793                 sdata->vif.p2p = true;
1794                 fallthrough;
1795         case NL80211_IFTYPE_STATION:
1796                 sdata->vif.bss_conf.bssid = sdata->deflink.u.mgd.bssid;
1797                 ieee80211_sta_setup_sdata(sdata);
1798                 break;
1799         case NL80211_IFTYPE_OCB:
1800                 sdata->vif.bss_conf.bssid = bssid_wildcard;
1801                 ieee80211_ocb_setup_sdata(sdata);
1802                 break;
1803         case NL80211_IFTYPE_ADHOC:
1804                 sdata->vif.bss_conf.bssid = sdata->u.ibss.bssid;
1805                 ieee80211_ibss_setup_sdata(sdata);
1806                 break;
1807         case NL80211_IFTYPE_MESH_POINT:
1808                 if (ieee80211_vif_is_mesh(&sdata->vif))
1809                         ieee80211_mesh_init_sdata(sdata);
1810                 break;
1811         case NL80211_IFTYPE_MONITOR:
1812                 sdata->dev->type = ARPHRD_IEEE80211_RADIOTAP;
1813                 sdata->dev->netdev_ops = &ieee80211_monitorif_ops;
1814                 sdata->u.mntr.flags = MONITOR_FLAG_CONTROL |
1815                                       MONITOR_FLAG_OTHER_BSS;
1816                 break;
1817         case NL80211_IFTYPE_NAN:
1818                 idr_init(&sdata->u.nan.function_inst_ids);
1819                 spin_lock_init(&sdata->u.nan.func_lock);
1820                 sdata->vif.bss_conf.bssid = sdata->vif.addr;
1821                 break;
1822         case NL80211_IFTYPE_AP_VLAN:
1823         case NL80211_IFTYPE_P2P_DEVICE:
1824                 sdata->vif.bss_conf.bssid = sdata->vif.addr;
1825                 break;
1826         case NL80211_IFTYPE_UNSPECIFIED:
1827         case NL80211_IFTYPE_WDS:
1828         case NUM_NL80211_IFTYPES:
1829                 WARN_ON(1);
1830                 break;
1831         }
1832
1833         /* need to do this after the switch so vif.type is correct */
1834         ieee80211_link_setup(&sdata->deflink);
1835
1836         ieee80211_debugfs_add_netdev(sdata);
1837 }
1838
1839 static int ieee80211_runtime_change_iftype(struct ieee80211_sub_if_data *sdata,
1840                                            enum nl80211_iftype type)
1841 {
1842         struct ieee80211_local *local = sdata->local;
1843         int ret, err;
1844         enum nl80211_iftype internal_type = type;
1845         bool p2p = false;
1846
1847         ASSERT_RTNL();
1848
1849         if (!local->ops->change_interface)
1850                 return -EBUSY;
1851
1852         /* for now, don't support changing while links exist */
1853         if (sdata->vif.valid_links)
1854                 return -EBUSY;
1855
1856         switch (sdata->vif.type) {
1857         case NL80211_IFTYPE_AP:
1858                 if (!list_empty(&sdata->u.ap.vlans))
1859                         return -EBUSY;
1860                 break;
1861         case NL80211_IFTYPE_STATION:
1862         case NL80211_IFTYPE_ADHOC:
1863         case NL80211_IFTYPE_OCB:
1864                 /*
1865                  * Could maybe also all others here?
1866                  * Just not sure how that interacts
1867                  * with the RX/config path e.g. for
1868                  * mesh.
1869                  */
1870                 break;
1871         default:
1872                 return -EBUSY;
1873         }
1874
1875         switch (type) {
1876         case NL80211_IFTYPE_AP:
1877         case NL80211_IFTYPE_STATION:
1878         case NL80211_IFTYPE_ADHOC:
1879         case NL80211_IFTYPE_OCB:
1880                 /*
1881                  * Could probably support everything
1882                  * but here.
1883                  */
1884                 break;
1885         case NL80211_IFTYPE_P2P_CLIENT:
1886                 p2p = true;
1887                 internal_type = NL80211_IFTYPE_STATION;
1888                 break;
1889         case NL80211_IFTYPE_P2P_GO:
1890                 p2p = true;
1891                 internal_type = NL80211_IFTYPE_AP;
1892                 break;
1893         default:
1894                 return -EBUSY;
1895         }
1896
1897         ret = ieee80211_check_concurrent_iface(sdata, internal_type);
1898         if (ret)
1899                 return ret;
1900
1901         ieee80211_stop_vif_queues(local, sdata,
1902                                   IEEE80211_QUEUE_STOP_REASON_IFTYPE_CHANGE);
1903         synchronize_net();
1904
1905         ieee80211_do_stop(sdata, false);
1906
1907         ieee80211_teardown_sdata(sdata);
1908
1909         ieee80211_set_sdata_offload_flags(sdata);
1910         ret = drv_change_interface(local, sdata, internal_type, p2p);
1911         if (ret)
1912                 type = ieee80211_vif_type_p2p(&sdata->vif);
1913
1914         /*
1915          * Ignore return value here, there's not much we can do since
1916          * the driver changed the interface type internally already.
1917          * The warnings will hopefully make driver authors fix it :-)
1918          */
1919         ieee80211_check_queues(sdata, type);
1920
1921         ieee80211_setup_sdata(sdata, type);
1922         ieee80211_set_vif_encap_ops(sdata);
1923
1924         err = ieee80211_do_open(&sdata->wdev, false);
1925         WARN(err, "type change: do_open returned %d", err);
1926
1927         ieee80211_wake_vif_queues(local, sdata,
1928                                   IEEE80211_QUEUE_STOP_REASON_IFTYPE_CHANGE);
1929         return ret;
1930 }
1931
1932 int ieee80211_if_change_type(struct ieee80211_sub_if_data *sdata,
1933                              enum nl80211_iftype type)
1934 {
1935         int ret;
1936
1937         ASSERT_RTNL();
1938
1939         if (type == ieee80211_vif_type_p2p(&sdata->vif))
1940                 return 0;
1941
1942         if (ieee80211_sdata_running(sdata)) {
1943                 ret = ieee80211_runtime_change_iftype(sdata, type);
1944                 if (ret)
1945                         return ret;
1946         } else {
1947                 /* Purge and reset type-dependent state. */
1948                 ieee80211_teardown_sdata(sdata);
1949                 ieee80211_setup_sdata(sdata, type);
1950         }
1951
1952         /* reset some values that shouldn't be kept across type changes */
1953         if (type == NL80211_IFTYPE_STATION)
1954                 sdata->u.mgd.use_4addr = false;
1955
1956         return 0;
1957 }
1958
1959 static void ieee80211_assign_perm_addr(struct ieee80211_local *local,
1960                                        u8 *perm_addr, enum nl80211_iftype type)
1961 {
1962         struct ieee80211_sub_if_data *sdata;
1963         u64 mask, start, addr, val, inc;
1964         u8 *m;
1965         u8 tmp_addr[ETH_ALEN];
1966         int i;
1967
1968         /* default ... something at least */
1969         memcpy(perm_addr, local->hw.wiphy->perm_addr, ETH_ALEN);
1970
1971         if (is_zero_ether_addr(local->hw.wiphy->addr_mask) &&
1972             local->hw.wiphy->n_addresses <= 1)
1973                 return;
1974
1975         mutex_lock(&local->iflist_mtx);
1976
1977         switch (type) {
1978         case NL80211_IFTYPE_MONITOR:
1979                 /* doesn't matter */
1980                 break;
1981         case NL80211_IFTYPE_AP_VLAN:
1982                 /* match up with an AP interface */
1983                 list_for_each_entry(sdata, &local->interfaces, list) {
1984                         if (sdata->vif.type != NL80211_IFTYPE_AP)
1985                                 continue;
1986                         memcpy(perm_addr, sdata->vif.addr, ETH_ALEN);
1987                         break;
1988                 }
1989                 /* keep default if no AP interface present */
1990                 break;
1991         case NL80211_IFTYPE_P2P_CLIENT:
1992         case NL80211_IFTYPE_P2P_GO:
1993                 if (ieee80211_hw_check(&local->hw, P2P_DEV_ADDR_FOR_INTF)) {
1994                         list_for_each_entry(sdata, &local->interfaces, list) {
1995                                 if (sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE)
1996                                         continue;
1997                                 if (!ieee80211_sdata_running(sdata))
1998                                         continue;
1999                                 memcpy(perm_addr, sdata->vif.addr, ETH_ALEN);
2000                                 goto out_unlock;
2001                         }
2002                 }
2003                 fallthrough;
2004         default:
2005                 /* assign a new address if possible -- try n_addresses first */
2006                 for (i = 0; i < local->hw.wiphy->n_addresses; i++) {
2007                         bool used = false;
2008
2009                         list_for_each_entry(sdata, &local->interfaces, list) {
2010                                 if (ether_addr_equal(local->hw.wiphy->addresses[i].addr,
2011                                                      sdata->vif.addr)) {
2012                                         used = true;
2013                                         break;
2014                                 }
2015                         }
2016
2017                         if (!used) {
2018                                 memcpy(perm_addr,
2019                                        local->hw.wiphy->addresses[i].addr,
2020                                        ETH_ALEN);
2021                                 break;
2022                         }
2023                 }
2024
2025                 /* try mask if available */
2026                 if (is_zero_ether_addr(local->hw.wiphy->addr_mask))
2027                         break;
2028
2029                 m = local->hw.wiphy->addr_mask;
2030                 mask =  ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) |
2031                         ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) |
2032                         ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8);
2033
2034                 if (__ffs64(mask) + hweight64(mask) != fls64(mask)) {
2035                         /* not a contiguous mask ... not handled now! */
2036                         pr_info("not contiguous\n");
2037                         break;
2038                 }
2039
2040                 /*
2041                  * Pick address of existing interface in case user changed
2042                  * MAC address manually, default to perm_addr.
2043                  */
2044                 m = local->hw.wiphy->perm_addr;
2045                 list_for_each_entry(sdata, &local->interfaces, list) {
2046                         if (sdata->vif.type == NL80211_IFTYPE_MONITOR)
2047                                 continue;
2048                         m = sdata->vif.addr;
2049                         break;
2050                 }
2051                 start = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) |
2052                         ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) |
2053                         ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8);
2054
2055                 inc = 1ULL<<__ffs64(mask);
2056                 val = (start & mask);
2057                 addr = (start & ~mask) | (val & mask);
2058                 do {
2059                         bool used = false;
2060
2061                         tmp_addr[5] = addr >> 0*8;
2062                         tmp_addr[4] = addr >> 1*8;
2063                         tmp_addr[3] = addr >> 2*8;
2064                         tmp_addr[2] = addr >> 3*8;
2065                         tmp_addr[1] = addr >> 4*8;
2066                         tmp_addr[0] = addr >> 5*8;
2067
2068                         val += inc;
2069
2070                         list_for_each_entry(sdata, &local->interfaces, list) {
2071                                 if (ether_addr_equal(tmp_addr, sdata->vif.addr)) {
2072                                         used = true;
2073                                         break;
2074                                 }
2075                         }
2076
2077                         if (!used) {
2078                                 memcpy(perm_addr, tmp_addr, ETH_ALEN);
2079                                 break;
2080                         }
2081                         addr = (start & ~mask) | (val & mask);
2082                 } while (addr != start);
2083
2084                 break;
2085         }
2086
2087  out_unlock:
2088         mutex_unlock(&local->iflist_mtx);
2089 }
2090
2091 int ieee80211_if_add(struct ieee80211_local *local, const char *name,
2092                      unsigned char name_assign_type,
2093                      struct wireless_dev **new_wdev, enum nl80211_iftype type,
2094                      struct vif_params *params)
2095 {
2096         struct net_device *ndev = NULL;
2097         struct ieee80211_sub_if_data *sdata = NULL;
2098         struct txq_info *txqi;
2099         void (*if_setup)(struct net_device *dev);
2100         int ret, i;
2101         int txqs = 1;
2102
2103         ASSERT_RTNL();
2104
2105         if (type == NL80211_IFTYPE_P2P_DEVICE || type == NL80211_IFTYPE_NAN) {
2106                 struct wireless_dev *wdev;
2107
2108                 sdata = kzalloc(sizeof(*sdata) + local->hw.vif_data_size,
2109                                 GFP_KERNEL);
2110                 if (!sdata)
2111                         return -ENOMEM;
2112                 wdev = &sdata->wdev;
2113
2114                 sdata->dev = NULL;
2115                 strscpy(sdata->name, name, IFNAMSIZ);
2116                 ieee80211_assign_perm_addr(local, wdev->address, type);
2117                 memcpy(sdata->vif.addr, wdev->address, ETH_ALEN);
2118                 ether_addr_copy(sdata->vif.bss_conf.addr, sdata->vif.addr);
2119         } else {
2120                 int size = ALIGN(sizeof(*sdata) + local->hw.vif_data_size,
2121                                  sizeof(void *));
2122                 int txq_size = 0;
2123
2124                 if (local->ops->wake_tx_queue &&
2125                     type != NL80211_IFTYPE_AP_VLAN &&
2126                     (type != NL80211_IFTYPE_MONITOR ||
2127                      (params->flags & MONITOR_FLAG_ACTIVE)))
2128                         txq_size += sizeof(struct txq_info) +
2129                                     local->hw.txq_data_size;
2130
2131                 if (local->ops->wake_tx_queue) {
2132                         if_setup = ieee80211_if_setup_no_queue;
2133                 } else {
2134                         if_setup = ieee80211_if_setup;
2135                         if (local->hw.queues >= IEEE80211_NUM_ACS)
2136                                 txqs = IEEE80211_NUM_ACS;
2137                 }
2138
2139                 ndev = alloc_netdev_mqs(size + txq_size,
2140                                         name, name_assign_type,
2141                                         if_setup, txqs, 1);
2142                 if (!ndev)
2143                         return -ENOMEM;
2144
2145                 if (!local->ops->wake_tx_queue && local->hw.wiphy->tx_queue_len)
2146                         ndev->tx_queue_len = local->hw.wiphy->tx_queue_len;
2147
2148                 dev_net_set(ndev, wiphy_net(local->hw.wiphy));
2149
2150                 ndev->tstats = netdev_alloc_pcpu_stats(struct pcpu_sw_netstats);
2151                 if (!ndev->tstats) {
2152                         free_netdev(ndev);
2153                         return -ENOMEM;
2154                 }
2155
2156                 ndev->needed_headroom = local->tx_headroom +
2157                                         4*6 /* four MAC addresses */
2158                                         + 2 + 2 + 2 + 2 /* ctl, dur, seq, qos */
2159                                         + 6 /* mesh */
2160                                         + 8 /* rfc1042/bridge tunnel */
2161                                         - ETH_HLEN /* ethernet hard_header_len */
2162                                         + IEEE80211_ENCRYPT_HEADROOM;
2163                 ndev->needed_tailroom = IEEE80211_ENCRYPT_TAILROOM;
2164
2165                 ret = dev_alloc_name(ndev, ndev->name);
2166                 if (ret < 0) {
2167                         ieee80211_if_free(ndev);
2168                         free_netdev(ndev);
2169                         return ret;
2170                 }
2171
2172                 ieee80211_assign_perm_addr(local, ndev->perm_addr, type);
2173                 if (is_valid_ether_addr(params->macaddr))
2174                         eth_hw_addr_set(ndev, params->macaddr);
2175                 else
2176                         eth_hw_addr_set(ndev, ndev->perm_addr);
2177                 SET_NETDEV_DEV(ndev, wiphy_dev(local->hw.wiphy));
2178
2179                 /* don't use IEEE80211_DEV_TO_SUB_IF -- it checks too much */
2180                 sdata = netdev_priv(ndev);
2181                 ndev->ieee80211_ptr = &sdata->wdev;
2182                 memcpy(sdata->vif.addr, ndev->dev_addr, ETH_ALEN);
2183                 ether_addr_copy(sdata->vif.bss_conf.addr, sdata->vif.addr);
2184                 memcpy(sdata->name, ndev->name, IFNAMSIZ);
2185
2186                 if (txq_size) {
2187                         txqi = netdev_priv(ndev) + size;
2188                         ieee80211_txq_init(sdata, NULL, txqi, 0);
2189                 }
2190
2191                 sdata->dev = ndev;
2192         }
2193
2194         /* initialise type-independent data */
2195         sdata->wdev.wiphy = local->hw.wiphy;
2196
2197         ieee80211_sdata_init(local, sdata);
2198
2199         ieee80211_init_frag_cache(&sdata->frags);
2200
2201         INIT_LIST_HEAD(&sdata->key_list);
2202
2203         INIT_DELAYED_WORK(&sdata->dec_tailroom_needed_wk,
2204                           ieee80211_delayed_tailroom_dec);
2205
2206         for (i = 0; i < NUM_NL80211_BANDS; i++) {
2207                 struct ieee80211_supported_band *sband;
2208                 sband = local->hw.wiphy->bands[i];
2209                 sdata->rc_rateidx_mask[i] =
2210                         sband ? (1 << sband->n_bitrates) - 1 : 0;
2211                 if (sband) {
2212                         __le16 cap;
2213                         u16 *vht_rate_mask;
2214
2215                         memcpy(sdata->rc_rateidx_mcs_mask[i],
2216                                sband->ht_cap.mcs.rx_mask,
2217                                sizeof(sdata->rc_rateidx_mcs_mask[i]));
2218
2219                         cap = sband->vht_cap.vht_mcs.rx_mcs_map;
2220                         vht_rate_mask = sdata->rc_rateidx_vht_mcs_mask[i];
2221                         ieee80211_get_vht_mask_from_cap(cap, vht_rate_mask);
2222                 } else {
2223                         memset(sdata->rc_rateidx_mcs_mask[i], 0,
2224                                sizeof(sdata->rc_rateidx_mcs_mask[i]));
2225                         memset(sdata->rc_rateidx_vht_mcs_mask[i], 0,
2226                                sizeof(sdata->rc_rateidx_vht_mcs_mask[i]));
2227                 }
2228         }
2229
2230         ieee80211_set_default_queues(sdata);
2231
2232         sdata->deflink.ap_power_level = IEEE80211_UNSET_POWER_LEVEL;
2233         sdata->deflink.user_power_level = local->user_power_level;
2234
2235         /* setup type-dependent data */
2236         ieee80211_setup_sdata(sdata, type);
2237
2238         if (ndev) {
2239                 ndev->ieee80211_ptr->use_4addr = params->use_4addr;
2240                 if (type == NL80211_IFTYPE_STATION)
2241                         sdata->u.mgd.use_4addr = params->use_4addr;
2242
2243                 ndev->features |= local->hw.netdev_features;
2244                 ndev->priv_flags |= IFF_LIVE_ADDR_CHANGE;
2245                 ndev->hw_features |= ndev->features &
2246                                         MAC80211_SUPPORTED_FEATURES_TX;
2247
2248                 netdev_set_default_ethtool_ops(ndev, &ieee80211_ethtool_ops);
2249
2250                 /* MTU range is normally 256 - 2304, where the upper limit is
2251                  * the maximum MSDU size. Monitor interfaces send and receive
2252                  * MPDU and A-MSDU frames which may be much larger so we do
2253                  * not impose an upper limit in that case.
2254                  */
2255                 ndev->min_mtu = 256;
2256                 if (type == NL80211_IFTYPE_MONITOR)
2257                         ndev->max_mtu = 0;
2258                 else
2259                         ndev->max_mtu = local->hw.max_mtu;
2260
2261                 ret = cfg80211_register_netdevice(ndev);
2262                 if (ret) {
2263                         free_netdev(ndev);
2264                         return ret;
2265                 }
2266         }
2267
2268         mutex_lock(&local->iflist_mtx);
2269         list_add_tail_rcu(&sdata->list, &local->interfaces);
2270         mutex_unlock(&local->iflist_mtx);
2271
2272         if (new_wdev)
2273                 *new_wdev = &sdata->wdev;
2274
2275         return 0;
2276 }
2277
2278 void ieee80211_if_remove(struct ieee80211_sub_if_data *sdata)
2279 {
2280         ASSERT_RTNL();
2281
2282         mutex_lock(&sdata->local->iflist_mtx);
2283         list_del_rcu(&sdata->list);
2284         mutex_unlock(&sdata->local->iflist_mtx);
2285
2286         if (sdata->vif.txq)
2287                 ieee80211_txq_purge(sdata->local, to_txq_info(sdata->vif.txq));
2288
2289         synchronize_rcu();
2290
2291         cfg80211_unregister_wdev(&sdata->wdev);
2292
2293         if (!sdata->dev) {
2294                 ieee80211_teardown_sdata(sdata);
2295                 kfree(sdata);
2296         }
2297 }
2298
2299 void ieee80211_sdata_stop(struct ieee80211_sub_if_data *sdata)
2300 {
2301         if (WARN_ON_ONCE(!test_bit(SDATA_STATE_RUNNING, &sdata->state)))
2302                 return;
2303         ieee80211_do_stop(sdata, true);
2304 }
2305
2306 void ieee80211_remove_interfaces(struct ieee80211_local *local)
2307 {
2308         struct ieee80211_sub_if_data *sdata, *tmp;
2309         LIST_HEAD(unreg_list);
2310         LIST_HEAD(wdev_list);
2311
2312         ASSERT_RTNL();
2313
2314         /* Before destroying the interfaces, make sure they're all stopped so
2315          * that the hardware is stopped. Otherwise, the driver might still be
2316          * iterating the interfaces during the shutdown, e.g. from a worker
2317          * or from RX processing or similar, and if it does so (using atomic
2318          * iteration) while we're manipulating the list, the iteration will
2319          * crash.
2320          *
2321          * After this, the hardware should be stopped and the driver should
2322          * have stopped all of its activities, so that we can do RCU-unaware
2323          * manipulations of the interface list below.
2324          */
2325         cfg80211_shutdown_all_interfaces(local->hw.wiphy);
2326
2327         WARN(local->open_count, "%s: open count remains %d\n",
2328              wiphy_name(local->hw.wiphy), local->open_count);
2329
2330         ieee80211_txq_teardown_flows(local);
2331
2332         mutex_lock(&local->iflist_mtx);
2333         list_for_each_entry_safe(sdata, tmp, &local->interfaces, list) {
2334                 list_del(&sdata->list);
2335
2336                 if (sdata->dev)
2337                         unregister_netdevice_queue(sdata->dev, &unreg_list);
2338                 else
2339                         list_add(&sdata->list, &wdev_list);
2340         }
2341         mutex_unlock(&local->iflist_mtx);
2342
2343         unregister_netdevice_many(&unreg_list);
2344
2345         wiphy_lock(local->hw.wiphy);
2346         list_for_each_entry_safe(sdata, tmp, &wdev_list, list) {
2347                 list_del(&sdata->list);
2348                 cfg80211_unregister_wdev(&sdata->wdev);
2349                 kfree(sdata);
2350         }
2351         wiphy_unlock(local->hw.wiphy);
2352 }
2353
2354 static int netdev_notify(struct notifier_block *nb,
2355                          unsigned long state, void *ptr)
2356 {
2357         struct net_device *dev = netdev_notifier_info_to_dev(ptr);
2358         struct ieee80211_sub_if_data *sdata;
2359
2360         if (state != NETDEV_CHANGENAME)
2361                 return NOTIFY_DONE;
2362
2363         if (!dev->ieee80211_ptr || !dev->ieee80211_ptr->wiphy)
2364                 return NOTIFY_DONE;
2365
2366         if (dev->ieee80211_ptr->wiphy->privid != mac80211_wiphy_privid)
2367                 return NOTIFY_DONE;
2368
2369         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2370         memcpy(sdata->name, dev->name, IFNAMSIZ);
2371         ieee80211_debugfs_rename_netdev(sdata);
2372
2373         return NOTIFY_OK;
2374 }
2375
2376 static struct notifier_block mac80211_netdev_notifier = {
2377         .notifier_call = netdev_notify,
2378 };
2379
2380 int ieee80211_iface_init(void)
2381 {
2382         return register_netdevice_notifier(&mac80211_netdev_notifier);
2383 }
2384
2385 void ieee80211_iface_exit(void)
2386 {
2387         unregister_netdevice_notifier(&mac80211_netdev_notifier);
2388 }
2389
2390 void ieee80211_vif_inc_num_mcast(struct ieee80211_sub_if_data *sdata)
2391 {
2392         if (sdata->vif.type == NL80211_IFTYPE_AP)
2393                 atomic_inc(&sdata->u.ap.num_mcast_sta);
2394         else if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
2395                 atomic_inc(&sdata->u.vlan.num_mcast_sta);
2396 }
2397
2398 void ieee80211_vif_dec_num_mcast(struct ieee80211_sub_if_data *sdata)
2399 {
2400         if (sdata->vif.type == NL80211_IFTYPE_AP)
2401                 atomic_dec(&sdata->u.ap.num_mcast_sta);
2402         else if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
2403                 atomic_dec(&sdata->u.vlan.num_mcast_sta);
2404 }