net/mac80211/main.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  * Copyright 2002-2005, Instant802 Networks, Inc.
   4  * Copyright 2005-2006, Devicescape Software, Inc.
   5  * Copyright 2006-2007  Jiri Benc <jbenc@suse.cz>
   6  * Copyright 2013-2014  Intel Mobile Communications GmbH
   7  * Copyright (C) 2017     Intel Deutschland GmbH
   8  * Copyright (C) 2018-2023 Intel Corporation
   9  */
  10
  11 #include <net/mac80211.h>
  12 #include <linux/module.h>
  13 #include <linux/fips.h>
  14 #include <linux/init.h>
  15 #include <linux/netdevice.h>
  16 #include <linux/types.h>
  17 #include <linux/slab.h>
  18 #include <linux/skbuff.h>
  19 #include <linux/etherdevice.h>
  20 #include <linux/if_arp.h>
  21 #include <linux/rtnetlink.h>
  22 #include <linux/bitmap.h>
  23 #include <linux/inetdevice.h>
  24 #include <net/net_namespace.h>
  25 #include <net/dropreason.h>
  26 #include <net/cfg80211.h>
  27 #include <net/addrconf.h>
  28
  29 #include "ieee80211_i.h"
  30 #include "driver-ops.h"
  31 #include "rate.h"
  32 #include "mesh.h"
  33 #include "wep.h"
  34 #include "led.h"
  35 #include "debugfs.h"
  36
  37 void ieee80211_configure_filter(struct ieee80211_local *local)
  38 {
  39         u64 mc;
  40         unsigned int changed_flags;
  41         unsigned int new_flags = 0;
  42
  43         if (atomic_read(&local->iff_allmultis))
  44                 new_flags |= FIF_ALLMULTI;
  45
  46         if (local->monitors || test_bit(SCAN_SW_SCANNING, &local->scanning) ||
  47             test_bit(SCAN_ONCHANNEL_SCANNING, &local->scanning))
  48                 new_flags |= FIF_BCN_PRBRESP_PROMISC;
  49
  50         if (local->fif_probe_req || local->probe_req_reg)
  51                 new_flags |= FIF_PROBE_REQ;
  52
  53         if (local->fif_fcsfail)
  54                 new_flags |= FIF_FCSFAIL;
  55
  56         if (local->fif_plcpfail)
  57                 new_flags |= FIF_PLCPFAIL;
  58
  59         if (local->fif_control)
  60                 new_flags |= FIF_CONTROL;
  61
  62         if (local->fif_other_bss)
  63                 new_flags |= FIF_OTHER_BSS;
  64
  65         if (local->fif_pspoll)
  66                 new_flags |= FIF_PSPOLL;
  67
  68         if (local->rx_mcast_action_reg)
  69                 new_flags |= FIF_MCAST_ACTION;
  70
  71         spin_lock_bh(&local->filter_lock);
  72         changed_flags = local->filter_flags ^ new_flags;
  73
  74         mc = drv_prepare_multicast(local, &local->mc_list);
  75         spin_unlock_bh(&local->filter_lock);
  76
  77         /* be a bit nasty */
  78         new_flags |= (1<<31);
  79
  80         drv_configure_filter(local, changed_flags, &new_flags, mc);
  81
  82         WARN_ON(new_flags & (1<<31));
  83
  84         local->filter_flags = new_flags & ~(1<<31);
  85 }
  86
  87 static void ieee80211_reconfig_filter(struct wiphy *wiphy,
  88                                       struct wiphy_work *work)
  89 {
  90         struct ieee80211_local *local =
  91                 container_of(work, struct ieee80211_local, reconfig_filter);
  92
  93         ieee80211_configure_filter(local);
  94 }
  95
  96 static u32 ieee80211_hw_conf_chan(struct ieee80211_local *local)
  97 {
  98         struct ieee80211_sub_if_data *sdata;
  99         struct cfg80211_chan_def chandef = {};
 100         u32 changed = 0;
 101         int power;
 102         u32 offchannel_flag;
 103
 104         offchannel_flag = local->hw.conf.flags & IEEE80211_CONF_OFFCHANNEL;
 105
 106         if (local->scan_chandef.chan) {
 107                 chandef = local->scan_chandef;
 108         } else if (local->tmp_channel) {
 109                 chandef.chan = local->tmp_channel;
 110                 chandef.width = NL80211_CHAN_WIDTH_20_NOHT;
 111                 chandef.center_freq1 = chandef.chan->center_freq;
 112                 chandef.freq1_offset = chandef.chan->freq_offset;
 113         } else
 114                 chandef = local->_oper_chandef;
 115
 116         WARN(!cfg80211_chandef_valid(&chandef),
 117              "control:%d.%03d MHz width:%d center: %d.%03d/%d MHz",
 118              chandef.chan->center_freq, chandef.chan->freq_offset,
 119              chandef.width, chandef.center_freq1, chandef.freq1_offset,
 120              chandef.center_freq2);
 121
 122         if (!cfg80211_chandef_identical(&chandef, &local->_oper_chandef))
 123                 local->hw.conf.flags |= IEEE80211_CONF_OFFCHANNEL;
 124         else
 125                 local->hw.conf.flags &= ~IEEE80211_CONF_OFFCHANNEL;
 126
 127         offchannel_flag ^= local->hw.conf.flags & IEEE80211_CONF_OFFCHANNEL;
 128
 129         if (offchannel_flag ||
 130             !cfg80211_chandef_identical(&local->hw.conf.chandef,
 131                                         &local->_oper_chandef)) {
 132                 local->hw.conf.chandef = chandef;
 133                 changed |= IEEE80211_CONF_CHANGE_CHANNEL;
 134         }
 135
 136         if (!conf_is_ht(&local->hw.conf)) {
 137                 /*
 138                  * mac80211.h documents that this is only valid
 139                  * when the channel is set to an HT type, and
 140                  * that otherwise STATIC is used.
 141                  */
 142                 local->hw.conf.smps_mode = IEEE80211_SMPS_STATIC;
 143         } else if (local->hw.conf.smps_mode != local->smps_mode) {
 144                 local->hw.conf.smps_mode = local->smps_mode;
 145                 changed |= IEEE80211_CONF_CHANGE_SMPS;
 146         }
 147
 148         power = ieee80211_chandef_max_power(&chandef);
 149
 150         rcu_read_lock();
 151         list_for_each_entry_rcu(sdata, &local->interfaces, list) {
 152                 if (!rcu_access_pointer(sdata->vif.bss_conf.chanctx_conf))
 153                         continue;
 154                 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
 155                         continue;
 156                 if (sdata->vif.bss_conf.txpower == INT_MIN)
 157                         continue;
 158                 power = min(power, sdata->vif.bss_conf.txpower);
 159         }
 160         rcu_read_unlock();
 161
 162         if (local->hw.conf.power_level != power) {
 163                 changed |= IEEE80211_CONF_CHANGE_POWER;
 164                 local->hw.conf.power_level = power;
 165         }
 166
 167         return changed;
 168 }
 169
 170 int ieee80211_hw_config(struct ieee80211_local *local, u32 changed)
 171 {
 172         int ret = 0;
 173
 174         might_sleep();
 175
 176         if (!local->use_chanctx)
 177                 changed |= ieee80211_hw_conf_chan(local);
 178         else
 179                 changed &= ~(IEEE80211_CONF_CHANGE_CHANNEL |
 180                              IEEE80211_CONF_CHANGE_POWER |
 181                              IEEE80211_CONF_CHANGE_SMPS);
 182
 183         if (changed && local->open_count) {
 184                 ret = drv_config(local, changed);
 185                 /*
 186                  * Goal:
 187                  * HW reconfiguration should never fail, the driver has told
 188                  * us what it can support so it should live up to that promise.
 189                  *
 190                  * Current status:
 191                  * rfkill is not integrated with mac80211 and a
 192                  * configuration command can thus fail if hardware rfkill
 193                  * is enabled
 194                  *
 195                  * FIXME: integrate rfkill with mac80211 and then add this
 196                  * WARN_ON() back
 197                  *
 198                  */
 199                 /* WARN_ON(ret); */
 200         }
 201
 202         return ret;
 203 }
 204
 205 #define BSS_CHANGED_VIF_CFG_FLAGS (BSS_CHANGED_ASSOC |\
 206                                    BSS_CHANGED_IDLE |\
 207                                    BSS_CHANGED_PS |\
 208                                    BSS_CHANGED_IBSS |\
 209                                    BSS_CHANGED_ARP_FILTER |\
 210                                    BSS_CHANGED_SSID |\
 211                                    BSS_CHANGED_MLD_VALID_LINKS |\
 212                                    BSS_CHANGED_MLD_TTLM)
 213
 214 void ieee80211_bss_info_change_notify(struct ieee80211_sub_if_data *sdata,
 215                                       u64 changed)
 216 {
 217         struct ieee80211_local *local = sdata->local;
 218
 219         might_sleep();
 220
 221         if (!changed || sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
 222                 return;
 223
 224         if (WARN_ON_ONCE(changed & (BSS_CHANGED_BEACON |
 225                                     BSS_CHANGED_BEACON_ENABLED) &&
 226                          sdata->vif.type != NL80211_IFTYPE_AP &&
 227                          sdata->vif.type != NL80211_IFTYPE_ADHOC &&
 228                          sdata->vif.type != NL80211_IFTYPE_MESH_POINT &&
 229                          sdata->vif.type != NL80211_IFTYPE_OCB))
 230                 return;
 231
 232         if (WARN_ON_ONCE(sdata->vif.type == NL80211_IFTYPE_P2P_DEVICE ||
 233                          sdata->vif.type == NL80211_IFTYPE_NAN ||
 234                          (sdata->vif.type == NL80211_IFTYPE_MONITOR &&
 235                           !sdata->vif.bss_conf.mu_mimo_owner &&
 236                           !(changed & BSS_CHANGED_TXPOWER))))
 237                 return;
 238
 239         if (!check_sdata_in_driver(sdata))
 240                 return;
 241
 242         if (changed & BSS_CHANGED_VIF_CFG_FLAGS) {
 243                 u64 ch = changed & BSS_CHANGED_VIF_CFG_FLAGS;
 244
 245                 trace_drv_vif_cfg_changed(local, sdata, changed);
 246                 if (local->ops->vif_cfg_changed)
 247                         local->ops->vif_cfg_changed(&local->hw, &sdata->vif, ch);
 248         }
 249
 250         if (changed & ~BSS_CHANGED_VIF_CFG_FLAGS) {
 251                 u64 ch = changed & ~BSS_CHANGED_VIF_CFG_FLAGS;
 252
 253                 /* FIXME: should be for each link */
 254                 trace_drv_link_info_changed(local, sdata, &sdata->vif.bss_conf,
 255                                             changed);
 256                 if (local->ops->link_info_changed)
 257                         local->ops->link_info_changed(&local->hw, &sdata->vif,
 258                                                       &sdata->vif.bss_conf, ch);
 259         }
 260
 261         if (local->ops->bss_info_changed)
 262                 local->ops->bss_info_changed(&local->hw, &sdata->vif,
 263                                              &sdata->vif.bss_conf, changed);
 264         trace_drv_return_void(local);
 265 }
 266
 267 void ieee80211_vif_cfg_change_notify(struct ieee80211_sub_if_data *sdata,
 268                                      u64 changed)
 269 {
 270         struct ieee80211_local *local = sdata->local;
 271
 272         WARN_ON_ONCE(changed & ~BSS_CHANGED_VIF_CFG_FLAGS);
 273
 274         if (!changed || sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
 275                 return;
 276
 277         drv_vif_cfg_changed(local, sdata, changed);
 278 }
 279
 280 void ieee80211_link_info_change_notify(struct ieee80211_sub_if_data *sdata,
 281                                        struct ieee80211_link_data *link,
 282                                        u64 changed)
 283 {
 284         struct ieee80211_local *local = sdata->local;
 285
 286         WARN_ON_ONCE(changed & BSS_CHANGED_VIF_CFG_FLAGS);
 287
 288         if (!changed || sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
 289                 return;
 290
 291         if (!check_sdata_in_driver(sdata))
 292                 return;
 293
 294         drv_link_info_changed(local, sdata, link->conf, link->link_id, changed);
 295 }
 296
 297 u64 ieee80211_reset_erp_info(struct ieee80211_sub_if_data *sdata)
 298 {
 299         sdata->vif.bss_conf.use_cts_prot = false;
 300         sdata->vif.bss_conf.use_short_preamble = false;
 301         sdata->vif.bss_conf.use_short_slot = false;
 302         return BSS_CHANGED_ERP_CTS_PROT |
 303                BSS_CHANGED_ERP_PREAMBLE |
 304                BSS_CHANGED_ERP_SLOT;
 305 }
 306
 307 static void ieee80211_tasklet_handler(struct tasklet_struct *t)
 308 {
 309         struct ieee80211_local *local = from_tasklet(local, t, tasklet);
 310         struct sk_buff *skb;
 311
 312         while ((skb = skb_dequeue(&local->skb_queue)) ||
 313                (skb = skb_dequeue(&local->skb_queue_unreliable))) {
 314                 switch (skb->pkt_type) {
 315                 case IEEE80211_RX_MSG:
 316                         /* Clear skb->pkt_type in order to not confuse kernel
 317                          * netstack. */
 318                         skb->pkt_type = 0;
 319                         ieee80211_rx(&local->hw, skb);
 320                         break;
 321                 case IEEE80211_TX_STATUS_MSG:
 322                         skb->pkt_type = 0;
 323                         ieee80211_tx_status_skb(&local->hw, skb);
 324                         break;
 325                 default:
 326                         WARN(1, "mac80211: Packet is of unknown type %d\n",
 327                              skb->pkt_type);
 328                         dev_kfree_skb(skb);
 329                         break;
 330                 }
 331         }
 332 }
 333
 334 static void ieee80211_restart_work(struct work_struct *work)
 335 {
 336         struct ieee80211_local *local =
 337                 container_of(work, struct ieee80211_local, restart_work);
 338         struct ieee80211_sub_if_data *sdata;
 339         int ret;
 340
 341         flush_workqueue(local->workqueue);
 342
 343         rtnl_lock();
 344         /* we might do interface manipulations, so need both */
 345         wiphy_lock(local->hw.wiphy);
 346         wiphy_work_flush(local->hw.wiphy, NULL);
 347
 348         WARN(test_bit(SCAN_HW_SCANNING, &local->scanning),
 349              "%s called with hardware scan in progress\n", __func__);
 350
 351         list_for_each_entry(sdata, &local->interfaces, list) {
 352                 /*
 353                  * XXX: there may be more work for other vif types and even
 354                  * for station mode: a good thing would be to run most of
 355                  * the iface type's dependent _stop (ieee80211_mg_stop,
 356                  * ieee80211_ibss_stop) etc...
 357                  * For now, fix only the specific bug that was seen: race
 358                  * between csa_connection_drop_work and us.
 359                  */
 360                 if (sdata->vif.type == NL80211_IFTYPE_STATION) {
 361                         /*
 362                          * This worker is scheduled from the iface worker that
 363                          * runs on mac80211's workqueue, so we can't be
 364                          * scheduling this worker after the cancel right here.
 365                          * The exception is ieee80211_chswitch_done.
 366                          * Then we can have a race...
 367                          */
 368                         wiphy_work_cancel(local->hw.wiphy,
 369                                           &sdata->u.mgd.csa_connection_drop_work);
 370                         if (sdata->vif.bss_conf.csa_active)
 371                                 ieee80211_sta_connection_lost(sdata,
 372                                                               WLAN_REASON_UNSPECIFIED,
 373                                                               false);
 374                 }
 375                 wiphy_delayed_work_flush(local->hw.wiphy,
 376                                          &sdata->dec_tailroom_needed_wk);
 377         }
 378         ieee80211_scan_cancel(local);
 379
 380         /* make sure any new ROC will consider local->in_reconfig */
 381         wiphy_delayed_work_flush(local->hw.wiphy, &local->roc_work);
 382         wiphy_work_flush(local->hw.wiphy, &local->hw_roc_done);
 383
 384         /* wait for all packet processing to be done */
 385         synchronize_net();
 386
 387         ret = ieee80211_reconfig(local);
 388         wiphy_unlock(local->hw.wiphy);
 389
 390         if (ret)
 391                 cfg80211_shutdown_all_interfaces(local->hw.wiphy);
 392
 393         rtnl_unlock();
 394 }
 395
 396 void ieee80211_restart_hw(struct ieee80211_hw *hw)
 397 {
 398         struct ieee80211_local *local = hw_to_local(hw);
 399
 400         trace_api_restart_hw(local);
 401
 402         wiphy_info(hw->wiphy,
 403                    "Hardware restart was requested\n");
 404
 405         /* use this reason, ieee80211_reconfig will unblock it */
 406         ieee80211_stop_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP,
 407                                         IEEE80211_QUEUE_STOP_REASON_SUSPEND,
 408                                         false);
 409
 410         /*
 411          * Stop all Rx during the reconfig. We don't want state changes
 412          * or driver callbacks while this is in progress.
 413          */
 414         local->in_reconfig = true;
 415         barrier();
 416
 417         queue_work(system_freezable_wq, &local->restart_work);
 418 }
 419 EXPORT_SYMBOL(ieee80211_restart_hw);
 420
 421 #ifdef CONFIG_INET
 422 static int ieee80211_ifa_changed(struct notifier_block *nb,
 423                                  unsigned long data, void *arg)
 424 {
 425         struct in_ifaddr *ifa = arg;
 426         struct ieee80211_local *local =
 427                 container_of(nb, struct ieee80211_local,
 428                              ifa_notifier);
 429         struct net_device *ndev = ifa->ifa_dev->dev;
 430         struct wireless_dev *wdev = ndev->ieee80211_ptr;
 431         struct in_device *idev;
 432         struct ieee80211_sub_if_data *sdata;
 433         struct ieee80211_vif_cfg *vif_cfg;
 434         struct ieee80211_if_managed *ifmgd;
 435         int c = 0;
 436
 437         /* Make sure it's our interface that got changed */
 438         if (!wdev)
 439                 return NOTIFY_DONE;
 440
 441         if (wdev->wiphy != local->hw.wiphy || !wdev->registered)
 442                 return NOTIFY_DONE;
 443
 444         sdata = IEEE80211_DEV_TO_SUB_IF(ndev);
 445         vif_cfg = &sdata->vif.cfg;
 446
 447         /* ARP filtering is only supported in managed mode */
 448         if (sdata->vif.type != NL80211_IFTYPE_STATION)
 449                 return NOTIFY_DONE;
 450
 451         idev = __in_dev_get_rtnl(sdata->dev);
 452         if (!idev)
 453                 return NOTIFY_DONE;
 454
 455         ifmgd = &sdata->u.mgd;
 456
 457         /*
 458          * The nested here is needed to convince lockdep that this is
 459          * all OK. Yes, we lock the wiphy mutex here while we already
 460          * hold the notifier rwsem, that's the normal case. And yes,
 461          * we also acquire the notifier rwsem again when unregistering
 462          * a netdev while we already hold the wiphy mutex, so it does
 463          * look like a typical ABBA deadlock.
 464          *
 465          * However, both of these things happen with the RTNL held
 466          * already. Therefore, they can't actually happen, since the
 467          * lock orders really are ABC and ACB, which is fine due to
 468          * the RTNL (A).
 469          *
 470          * We still need to prevent recursion, which is accomplished
 471          * by the !wdev->registered check above.
 472          */
 473         mutex_lock_nested(&local->hw.wiphy->mtx, 1);
 474         __acquire(&local->hw.wiphy->mtx);
 475
 476         /* Copy the addresses to the vif config list */
 477         ifa = rtnl_dereference(idev->ifa_list);
 478         while (ifa) {
 479                 if (c < IEEE80211_BSS_ARP_ADDR_LIST_LEN)
 480                         vif_cfg->arp_addr_list[c] = ifa->ifa_address;
 481                 ifa = rtnl_dereference(ifa->ifa_next);
 482                 c++;
 483         }
 484
 485         vif_cfg->arp_addr_cnt = c;
 486
 487         /* Configure driver only if associated (which also implies it is up) */
 488         if (ifmgd->associated)
 489                 ieee80211_vif_cfg_change_notify(sdata, BSS_CHANGED_ARP_FILTER);
 490
 491         wiphy_unlock(local->hw.wiphy);
 492
 493         return NOTIFY_OK;
 494 }
 495 #endif
 496
 497 #if IS_ENABLED(CONFIG_IPV6)
 498 static int ieee80211_ifa6_changed(struct notifier_block *nb,
 499                                   unsigned long data, void *arg)
 500 {
 501         struct inet6_ifaddr *ifa = (struct inet6_ifaddr *)arg;
 502         struct inet6_dev *idev = ifa->idev;
 503         struct net_device *ndev = ifa->idev->dev;
 504         struct ieee80211_local *local =
 505                 container_of(nb, struct ieee80211_local, ifa6_notifier);
 506         struct wireless_dev *wdev = ndev->ieee80211_ptr;
 507         struct ieee80211_sub_if_data *sdata;
 508
 509         /* Make sure it's our interface that got changed */
 510         if (!wdev || wdev->wiphy != local->hw.wiphy)
 511                 return NOTIFY_DONE;
 512
 513         sdata = IEEE80211_DEV_TO_SUB_IF(ndev);
 514
 515         /*
 516          * For now only support station mode. This is mostly because
 517          * doing AP would have to handle AP_VLAN in some way ...
 518          */
 519         if (sdata->vif.type != NL80211_IFTYPE_STATION)
 520                 return NOTIFY_DONE;
 521
 522         drv_ipv6_addr_change(local, sdata, idev);
 523
 524         return NOTIFY_OK;
 525 }
 526 #endif
 527
 528 /* There isn't a lot of sense in it, but you can transmit anything you like */
 529 static const struct ieee80211_txrx_stypes
 530 ieee80211_default_mgmt_stypes[NUM_NL80211_IFTYPES] = {
 531         [NL80211_IFTYPE_ADHOC] = {
 532                 .tx = 0xffff,
 533                 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
 534                         BIT(IEEE80211_STYPE_AUTH >> 4) |
 535                         BIT(IEEE80211_STYPE_DEAUTH >> 4) |
 536                         BIT(IEEE80211_STYPE_PROBE_REQ >> 4),
 537         },
 538         [NL80211_IFTYPE_STATION] = {
 539                 .tx = 0xffff,
 540                 /*
 541                  * To support Pre Association Security Negotiation (PASN) while
 542                  * already associated to one AP, allow user space to register to
 543                  * Rx authentication frames, so that the user space logic would
 544                  * be able to receive/handle authentication frames from a
 545                  * different AP as part of PASN.
 546                  * It is expected that user space would intelligently register
 547                  * for Rx authentication frames, i.e., only when PASN is used
 548                  * and configure a match filter only for PASN authentication
 549                  * algorithm, as otherwise the MLME functionality of mac80211
 550                  * would be broken.
 551                  */
 552                 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
 553                         BIT(IEEE80211_STYPE_AUTH >> 4) |
 554                         BIT(IEEE80211_STYPE_PROBE_REQ >> 4),
 555         },
 556         [NL80211_IFTYPE_AP] = {
 557                 .tx = 0xffff,
 558                 .rx = BIT(IEEE80211_STYPE_ASSOC_REQ >> 4) |
 559                         BIT(IEEE80211_STYPE_REASSOC_REQ >> 4) |
 560                         BIT(IEEE80211_STYPE_PROBE_REQ >> 4) |
 561                         BIT(IEEE80211_STYPE_DISASSOC >> 4) |
 562                         BIT(IEEE80211_STYPE_AUTH >> 4) |
 563                         BIT(IEEE80211_STYPE_DEAUTH >> 4) |
 564                         BIT(IEEE80211_STYPE_ACTION >> 4),
 565         },
 566         [NL80211_IFTYPE_AP_VLAN] = {
 567                 /* copy AP */
 568                 .tx = 0xffff,
 569                 .rx = BIT(IEEE80211_STYPE_ASSOC_REQ >> 4) |
 570                         BIT(IEEE80211_STYPE_REASSOC_REQ >> 4) |
 571                         BIT(IEEE80211_STYPE_PROBE_REQ >> 4) |
 572                         BIT(IEEE80211_STYPE_DISASSOC >> 4) |
 573                         BIT(IEEE80211_STYPE_AUTH >> 4) |
 574                         BIT(IEEE80211_STYPE_DEAUTH >> 4) |
 575                         BIT(IEEE80211_STYPE_ACTION >> 4),
 576         },
 577         [NL80211_IFTYPE_P2P_CLIENT] = {
 578                 .tx = 0xffff,
 579                 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
 580                         BIT(IEEE80211_STYPE_PROBE_REQ >> 4),
 581         },
 582         [NL80211_IFTYPE_P2P_GO] = {
 583                 .tx = 0xffff,
 584                 .rx = BIT(IEEE80211_STYPE_ASSOC_REQ >> 4) |
 585                         BIT(IEEE80211_STYPE_REASSOC_REQ >> 4) |
 586                         BIT(IEEE80211_STYPE_PROBE_REQ >> 4) |
 587                         BIT(IEEE80211_STYPE_DISASSOC >> 4) |
 588                         BIT(IEEE80211_STYPE_AUTH >> 4) |
 589                         BIT(IEEE80211_STYPE_DEAUTH >> 4) |
 590                         BIT(IEEE80211_STYPE_ACTION >> 4),
 591         },
 592         [NL80211_IFTYPE_MESH_POINT] = {
 593                 .tx = 0xffff,
 594                 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
 595                         BIT(IEEE80211_STYPE_AUTH >> 4) |
 596                         BIT(IEEE80211_STYPE_DEAUTH >> 4),
 597         },
 598         [NL80211_IFTYPE_P2P_DEVICE] = {
 599                 .tx = 0xffff,
 600                 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
 601                         BIT(IEEE80211_STYPE_PROBE_REQ >> 4),
 602         },
 603 };
 604
 605 static const struct ieee80211_ht_cap mac80211_ht_capa_mod_mask = {
 606         .ampdu_params_info = IEEE80211_HT_AMPDU_PARM_FACTOR |
 607                              IEEE80211_HT_AMPDU_PARM_DENSITY,
 608
 609         .cap_info = cpu_to_le16(IEEE80211_HT_CAP_SUP_WIDTH_20_40 |
 610                                 IEEE80211_HT_CAP_MAX_AMSDU |
 611                                 IEEE80211_HT_CAP_SGI_20 |
 612                                 IEEE80211_HT_CAP_SGI_40 |
 613                                 IEEE80211_HT_CAP_TX_STBC |
 614                                 IEEE80211_HT_CAP_RX_STBC |
 615                                 IEEE80211_HT_CAP_LDPC_CODING |
 616                                 IEEE80211_HT_CAP_40MHZ_INTOLERANT),
 617         .mcs = {
 618                 .rx_mask = { 0xff, 0xff, 0xff, 0xff, 0xff,
 619                              0xff, 0xff, 0xff, 0xff, 0xff, },
 620         },
 621 };
 622
 623 static const struct ieee80211_vht_cap mac80211_vht_capa_mod_mask = {
 624         .vht_cap_info =
 625                 cpu_to_le32(IEEE80211_VHT_CAP_RXLDPC |
 626                             IEEE80211_VHT_CAP_SHORT_GI_80 |
 627                             IEEE80211_VHT_CAP_SHORT_GI_160 |
 628                             IEEE80211_VHT_CAP_RXSTBC_MASK |
 629                             IEEE80211_VHT_CAP_TXSTBC |
 630                             IEEE80211_VHT_CAP_SU_BEAMFORMER_CAPABLE |
 631                             IEEE80211_VHT_CAP_SU_BEAMFORMEE_CAPABLE |
 632                             IEEE80211_VHT_CAP_TX_ANTENNA_PATTERN |
 633                             IEEE80211_VHT_CAP_RX_ANTENNA_PATTERN |
 634                             IEEE80211_VHT_CAP_MAX_A_MPDU_LENGTH_EXPONENT_MASK),
 635         .supp_mcs = {
 636                 .rx_mcs_map = cpu_to_le16(~0),
 637                 .tx_mcs_map = cpu_to_le16(~0),
 638         },
 639 };
 640
 641 struct ieee80211_hw *ieee80211_alloc_hw_nm(size_t priv_data_len,
 642                                            const struct ieee80211_ops *ops,
 643                                            const char *requested_name)
 644 {
 645         struct ieee80211_local *local;
 646         int priv_size, i;
 647         struct wiphy *wiphy;
 648         bool use_chanctx;
 649
 650         if (WARN_ON(!ops->tx || !ops->start || !ops->stop || !ops->config ||
 651                     !ops->add_interface || !ops->remove_interface ||
 652                     !ops->configure_filter || !ops->wake_tx_queue))
 653                 return NULL;
 654
 655         if (WARN_ON(ops->sta_state && (ops->sta_add || ops->sta_remove)))
 656                 return NULL;
 657
 658         if (WARN_ON(!!ops->link_info_changed != !!ops->vif_cfg_changed ||
 659                     (ops->link_info_changed && ops->bss_info_changed)))
 660                 return NULL;
 661
 662         /* check all or no channel context operations exist */
 663         i = !!ops->add_chanctx + !!ops->remove_chanctx +
 664             !!ops->change_chanctx + !!ops->assign_vif_chanctx +
 665             !!ops->unassign_vif_chanctx;
 666         if (WARN_ON(i != 0 && i != 5))
 667                 return NULL;
 668         use_chanctx = i == 5;
 669
 670         /* Ensure 32-byte alignment of our private data and hw private data.
 671          * We use the wiphy priv data for both our ieee80211_local and for
 672          * the driver's private data
 673          *
 674          * In memory it'll be like this:
 675          *
 676          * +-------------------------+
 677          * | struct wiphy           |
 678          * +-------------------------+
 679          * | struct ieee80211_local  |
 680          * +-------------------------+
 681          * | driver's private data   |
 682          * +-------------------------+
 683          *
 684          */
 685         priv_size = ALIGN(sizeof(*local), NETDEV_ALIGN) + priv_data_len;
 686
 687         wiphy = wiphy_new_nm(&mac80211_config_ops, priv_size, requested_name);
 688
 689         if (!wiphy)
 690                 return NULL;
 691
 692         wiphy->mgmt_stypes = ieee80211_default_mgmt_stypes;
 693
 694         wiphy->privid = mac80211_wiphy_privid;
 695
 696         wiphy->flags |= WIPHY_FLAG_NETNS_OK |
 697                         WIPHY_FLAG_4ADDR_AP |
 698                         WIPHY_FLAG_4ADDR_STATION |
 699                         WIPHY_FLAG_REPORTS_OBSS |
 700                         WIPHY_FLAG_OFFCHAN_TX;
 701
 702         if (!use_chanctx || ops->remain_on_channel)
 703                 wiphy->flags |= WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL;
 704
 705         wiphy->features |= NL80211_FEATURE_SK_TX_STATUS |
 706                            NL80211_FEATURE_SAE |
 707                            NL80211_FEATURE_HT_IBSS |
 708                            NL80211_FEATURE_VIF_TXPOWER |
 709                            NL80211_FEATURE_MAC_ON_CREATE |
 710                            NL80211_FEATURE_USERSPACE_MPM |
 711                            NL80211_FEATURE_FULL_AP_CLIENT_STATE;
 712         wiphy_ext_feature_set(wiphy, NL80211_EXT_FEATURE_FILS_STA);
 713         wiphy_ext_feature_set(wiphy,
 714                               NL80211_EXT_FEATURE_CONTROL_PORT_OVER_NL80211);
 715         wiphy_ext_feature_set(wiphy,
 716                               NL80211_EXT_FEATURE_CONTROL_PORT_NO_PREAUTH);
 717         wiphy_ext_feature_set(wiphy,
 718                               NL80211_EXT_FEATURE_CONTROL_PORT_OVER_NL80211_TX_STATUS);
 719         wiphy_ext_feature_set(wiphy,
 720                               NL80211_EXT_FEATURE_SCAN_FREQ_KHZ);
 721         wiphy_ext_feature_set(wiphy,
 722                               NL80211_EXT_FEATURE_POWERED_ADDR_CHANGE);
 723
 724         if (!ops->hw_scan) {
 725                 wiphy->features |= NL80211_FEATURE_LOW_PRIORITY_SCAN |
 726                                    NL80211_FEATURE_AP_SCAN;
 727                 /*
 728                  * if the driver behaves correctly using the probe request
 729                  * (template) from mac80211, then both of these should be
 730                  * supported even with hw scan - but let drivers opt in.
 731                  */
 732                 wiphy_ext_feature_set(wiphy,
 733                                       NL80211_EXT_FEATURE_SCAN_RANDOM_SN);
 734                 wiphy_ext_feature_set(wiphy,
 735                                       NL80211_EXT_FEATURE_SCAN_MIN_PREQ_CONTENT);
 736         }
 737
 738         if (!ops->set_key) {
 739                 wiphy->flags |= WIPHY_FLAG_IBSS_RSN;
 740                 wiphy_ext_feature_set(wiphy,
 741                                       NL80211_EXT_FEATURE_SPP_AMSDU_SUPPORT);
 742         }
 743
 744         wiphy_ext_feature_set(wiphy, NL80211_EXT_FEATURE_TXQS);
 745         wiphy_ext_feature_set(wiphy, NL80211_EXT_FEATURE_RRM);
 746
 747         wiphy->bss_priv_size = sizeof(struct ieee80211_bss);
 748
 749         local = wiphy_priv(wiphy);
 750
 751         if (sta_info_init(local))
 752                 goto err_free;
 753
 754         local->hw.wiphy = wiphy;
 755
 756         local->hw.priv = (char *)local + ALIGN(sizeof(*local), NETDEV_ALIGN);
 757
 758         local->ops = ops;
 759         local->use_chanctx = use_chanctx;
 760
 761         /*
 762          * We need a bit of data queued to build aggregates properly, so
 763          * instruct the TCP stack to allow more than a single ms of data
 764          * to be queued in the stack. The value is a bit-shift of 1
 765          * second, so 7 is ~8ms of queued data. Only affects local TCP
 766          * sockets.
 767          * This is the default, anyhow - drivers may need to override it
 768          * for local reasons (longer buffers, longer completion time, or
 769          * similar).
 770          */
 771         local->hw.tx_sk_pacing_shift = 7;
 772
 773         /* set up some defaults */
 774         local->hw.queues = 1;
 775         local->hw.max_rates = 1;
 776         local->hw.max_report_rates = 0;
 777         local->hw.max_rx_aggregation_subframes = IEEE80211_MAX_AMPDU_BUF_HT;
 778         local->hw.max_tx_aggregation_subframes = IEEE80211_MAX_AMPDU_BUF_HT;
 779         local->hw.offchannel_tx_hw_queue = IEEE80211_INVAL_HW_QUEUE;
 780         local->hw.conf.long_frame_max_tx_count = wiphy->retry_long;
 781         local->hw.conf.short_frame_max_tx_count = wiphy->retry_short;
 782         local->hw.radiotap_mcs_details = IEEE80211_RADIOTAP_MCS_HAVE_MCS |
 783                                          IEEE80211_RADIOTAP_MCS_HAVE_GI |
 784                                          IEEE80211_RADIOTAP_MCS_HAVE_BW;
 785         local->hw.radiotap_vht_details = IEEE80211_RADIOTAP_VHT_KNOWN_GI |
 786                                          IEEE80211_RADIOTAP_VHT_KNOWN_BANDWIDTH;
 787         local->hw.uapsd_queues = IEEE80211_DEFAULT_UAPSD_QUEUES;
 788         local->hw.uapsd_max_sp_len = IEEE80211_DEFAULT_MAX_SP_LEN;
 789         local->hw.max_mtu = IEEE80211_MAX_DATA_LEN;
 790         local->user_power_level = IEEE80211_UNSET_POWER_LEVEL;
 791         wiphy->ht_capa_mod_mask = &mac80211_ht_capa_mod_mask;
 792         wiphy->vht_capa_mod_mask = &mac80211_vht_capa_mod_mask;
 793
 794         local->ext_capa[7] = WLAN_EXT_CAPA8_OPMODE_NOTIF;
 795
 796         wiphy->extended_capabilities = local->ext_capa;
 797         wiphy->extended_capabilities_mask = local->ext_capa;
 798         wiphy->extended_capabilities_len =
 799                 ARRAY_SIZE(local->ext_capa);
 800
 801         INIT_LIST_HEAD(&local->interfaces);
 802         INIT_LIST_HEAD(&local->mon_list);
 803
 804         __hw_addr_init(&local->mc_list);
 805
 806         mutex_init(&local->iflist_mtx);
 807         spin_lock_init(&local->filter_lock);
 808         spin_lock_init(&local->rx_path_lock);
 809         spin_lock_init(&local->queue_stop_reason_lock);
 810
 811         for (i = 0; i < IEEE80211_NUM_ACS; i++) {
 812                 INIT_LIST_HEAD(&local->active_txqs[i]);
 813                 spin_lock_init(&local->active_txq_lock[i]);
 814                 local->aql_txq_limit_low[i] = IEEE80211_DEFAULT_AQL_TXQ_LIMIT_L;
 815                 local->aql_txq_limit_high[i] =
 816                         IEEE80211_DEFAULT_AQL_TXQ_LIMIT_H;
 817                 atomic_set(&local->aql_ac_pending_airtime[i], 0);
 818         }
 819
 820         local->airtime_flags = AIRTIME_USE_TX | AIRTIME_USE_RX;
 821         local->aql_threshold = IEEE80211_AQL_THRESHOLD;
 822         atomic_set(&local->aql_total_pending_airtime, 0);
 823
 824         spin_lock_init(&local->handle_wake_tx_queue_lock);
 825
 826         INIT_LIST_HEAD(&local->chanctx_list);
 827
 828         wiphy_delayed_work_init(&local->scan_work, ieee80211_scan_work);
 829
 830         INIT_WORK(&local->restart_work, ieee80211_restart_work);
 831
 832         wiphy_work_init(&local->radar_detected_work,
 833                         ieee80211_dfs_radar_detected_work);
 834
 835         wiphy_work_init(&local->reconfig_filter, ieee80211_reconfig_filter);
 836         local->smps_mode = IEEE80211_SMPS_OFF;
 837
 838         wiphy_work_init(&local->dynamic_ps_enable_work,
 839                         ieee80211_dynamic_ps_enable_work);
 840         wiphy_work_init(&local->dynamic_ps_disable_work,
 841                         ieee80211_dynamic_ps_disable_work);
 842         timer_setup(&local->dynamic_ps_timer, ieee80211_dynamic_ps_timer, 0);
 843
 844         wiphy_work_init(&local->sched_scan_stopped_work,
 845                         ieee80211_sched_scan_stopped_work);
 846
 847         spin_lock_init(&local->ack_status_lock);
 848         idr_init(&local->ack_status_frames);
 849
 850         for (i = 0; i < IEEE80211_MAX_QUEUES; i++) {
 851                 skb_queue_head_init(&local->pending[i]);
 852                 atomic_set(&local->agg_queue_stop[i], 0);
 853         }
 854         tasklet_setup(&local->tx_pending_tasklet, ieee80211_tx_pending);
 855         tasklet_setup(&local->wake_txqs_tasklet, ieee80211_wake_txqs);
 856         tasklet_setup(&local->tasklet, ieee80211_tasklet_handler);
 857
 858         skb_queue_head_init(&local->skb_queue);
 859         skb_queue_head_init(&local->skb_queue_unreliable);
 860
 861         ieee80211_alloc_led_names(local);
 862
 863         ieee80211_roc_setup(local);
 864
 865         local->hw.radiotap_timestamp.units_pos = -1;
 866         local->hw.radiotap_timestamp.accuracy = -1;
 867
 868         return &local->hw;
 869  err_free:
 870         wiphy_free(wiphy);
 871         return NULL;
 872 }
 873 EXPORT_SYMBOL(ieee80211_alloc_hw_nm);
 874
 875 static int ieee80211_init_cipher_suites(struct ieee80211_local *local)
 876 {
 877         bool have_wep = !fips_enabled; /* FIPS does not permit the use of RC4 */
 878         bool have_mfp = ieee80211_hw_check(&local->hw, MFP_CAPABLE);
 879         int r = 0, w = 0;
 880         u32 *suites;
 881         static const u32 cipher_suites[] = {
 882                 /* keep WEP first, it may be removed below */
 883                 WLAN_CIPHER_SUITE_WEP40,
 884                 WLAN_CIPHER_SUITE_WEP104,
 885                 WLAN_CIPHER_SUITE_TKIP,
 886                 WLAN_CIPHER_SUITE_CCMP,
 887                 WLAN_CIPHER_SUITE_CCMP_256,
 888                 WLAN_CIPHER_SUITE_GCMP,
 889                 WLAN_CIPHER_SUITE_GCMP_256,
 890
 891                 /* keep last -- depends on hw flags! */
 892                 WLAN_CIPHER_SUITE_AES_CMAC,
 893                 WLAN_CIPHER_SUITE_BIP_CMAC_256,
 894                 WLAN_CIPHER_SUITE_BIP_GMAC_128,
 895                 WLAN_CIPHER_SUITE_BIP_GMAC_256,
 896         };
 897
 898         if (ieee80211_hw_check(&local->hw, SW_CRYPTO_CONTROL) ||
 899             local->hw.wiphy->cipher_suites) {
 900                 /* If the driver advertises, or doesn't support SW crypto,
 901                  * we only need to remove WEP if necessary.
 902                  */
 903                 if (have_wep)
 904                         return 0;
 905
 906                 /* well if it has _no_ ciphers ... fine */
 907                 if (!local->hw.wiphy->n_cipher_suites)
 908                         return 0;
 909
 910                 /* Driver provides cipher suites, but we need to exclude WEP */
 911                 suites = kmemdup(local->hw.wiphy->cipher_suites,
 912                                  sizeof(u32) * local->hw.wiphy->n_cipher_suites,
 913                                  GFP_KERNEL);
 914                 if (!suites)
 915                         return -ENOMEM;
 916
 917                 for (r = 0; r < local->hw.wiphy->n_cipher_suites; r++) {
 918                         u32 suite = local->hw.wiphy->cipher_suites[r];
 919
 920                         if (suite == WLAN_CIPHER_SUITE_WEP40 ||
 921                             suite == WLAN_CIPHER_SUITE_WEP104)
 922                                 continue;
 923                         suites[w++] = suite;
 924                 }
 925         } else {
 926                 /* assign the (software supported and perhaps offloaded)
 927                  * cipher suites
 928                  */
 929                 local->hw.wiphy->cipher_suites = cipher_suites;
 930                 local->hw.wiphy->n_cipher_suites = ARRAY_SIZE(cipher_suites);
 931
 932                 if (!have_mfp)
 933                         local->hw.wiphy->n_cipher_suites -= 4;
 934
 935                 if (!have_wep) {
 936                         local->hw.wiphy->cipher_suites += 2;
 937                         local->hw.wiphy->n_cipher_suites -= 2;
 938                 }
 939
 940                 /* not dynamically allocated, so just return */
 941                 return 0;
 942         }
 943
 944         local->hw.wiphy->cipher_suites = suites;
 945         local->hw.wiphy->n_cipher_suites = w;
 946         local->wiphy_ciphers_allocated = true;
 947
 948         return 0;
 949 }
 950
 951 int ieee80211_register_hw(struct ieee80211_hw *hw)
 952 {
 953         struct ieee80211_local *local = hw_to_local(hw);
 954         int result, i;
 955         enum nl80211_band band;
 956         int channels, max_bitrates;
 957         bool supp_ht, supp_vht, supp_he, supp_eht;
 958         struct cfg80211_chan_def dflt_chandef = {};
 959
 960         if (ieee80211_hw_check(hw, QUEUE_CONTROL) &&
 961             (local->hw.offchannel_tx_hw_queue == IEEE80211_INVAL_HW_QUEUE ||
 962              local->hw.offchannel_tx_hw_queue >= local->hw.queues))
 963                 return -EINVAL;
 964
 965         if ((hw->wiphy->features & NL80211_FEATURE_TDLS_CHANNEL_SWITCH) &&
 966             (!local->ops->tdls_channel_switch ||
 967              !local->ops->tdls_cancel_channel_switch ||
 968              !local->ops->tdls_recv_channel_switch))
 969                 return -EOPNOTSUPP;
 970
 971         if (WARN_ON(ieee80211_hw_check(hw, SUPPORTS_TX_FRAG) &&
 972                     !local->ops->set_frag_threshold))
 973                 return -EINVAL;
 974
 975         if (WARN_ON(local->hw.wiphy->interface_modes &
 976                         BIT(NL80211_IFTYPE_NAN) &&
 977                     (!local->ops->start_nan || !local->ops->stop_nan)))
 978                 return -EINVAL;
 979
 980         if (hw->wiphy->flags & WIPHY_FLAG_SUPPORTS_MLO) {
 981                 /*
 982                  * For drivers capable of doing MLO, assume modern driver
 983                  * or firmware facilities, so software doesn't have to do
 984                  * as much, e.g. monitoring beacons would be hard if we
 985                  * might not even know which link is active at which time.
 986                  */
 987                 if (WARN_ON(!local->use_chanctx))
 988                         return -EINVAL;
 989
 990                 if (WARN_ON(!local->ops->link_info_changed))
 991                         return -EINVAL;
 992
 993                 if (WARN_ON(!ieee80211_hw_check(hw, HAS_RATE_CONTROL)))
 994                         return -EINVAL;
 995
 996                 if (WARN_ON(!ieee80211_hw_check(hw, AMPDU_AGGREGATION)))
 997                         return -EINVAL;
 998
 999                 if (WARN_ON(ieee80211_hw_check(hw, HOST_BROADCAST_PS_BUFFERING)))
1000                         return -EINVAL;
1001
1002                 if (WARN_ON(ieee80211_hw_check(hw, SUPPORTS_PS) &&
1003                             (!ieee80211_hw_check(hw, SUPPORTS_DYNAMIC_PS) ||
1004                              ieee80211_hw_check(hw, PS_NULLFUNC_STACK))))
1005                         return -EINVAL;
1006
1007                 if (WARN_ON(!ieee80211_hw_check(hw, MFP_CAPABLE)))
1008                         return -EINVAL;
1009
1010                 if (WARN_ON(!ieee80211_hw_check(hw, CONNECTION_MONITOR)))
1011                         return -EINVAL;
1012
1013                 if (WARN_ON(ieee80211_hw_check(hw, NEED_DTIM_BEFORE_ASSOC)))
1014                         return -EINVAL;
1015
1016                 if (WARN_ON(ieee80211_hw_check(hw, TIMING_BEACON_ONLY)))
1017                         return -EINVAL;
1018
1019                 if (WARN_ON(!ieee80211_hw_check(hw, AP_LINK_PS)))
1020                         return -EINVAL;
1021
1022                 if (WARN_ON(ieee80211_hw_check(hw, DEAUTH_NEED_MGD_TX_PREP)))
1023                         return -EINVAL;
1024         }
1025
1026 #ifdef CONFIG_PM
1027         if (hw->wiphy->wowlan && (!local->ops->suspend || !local->ops->resume))
1028                 return -EINVAL;
1029 #endif
1030
1031         if (!local->use_chanctx) {
1032                 for (i = 0; i < local->hw.wiphy->n_iface_combinations; i++) {
1033                         const struct ieee80211_iface_combination *comb;
1034
1035                         comb = &local->hw.wiphy->iface_combinations[i];
1036
1037                         if (comb->num_different_channels > 1)
1038                                 return -EINVAL;
1039                 }
1040         } else {
1041                 /* DFS is not supported with multi-channel combinations yet */
1042                 for (i = 0; i < local->hw.wiphy->n_iface_combinations; i++) {
1043                         const struct ieee80211_iface_combination *comb;
1044
1045                         comb = &local->hw.wiphy->iface_combinations[i];
1046
1047                         if (comb->radar_detect_widths &&
1048                             comb->num_different_channels > 1)
1049                                 return -EINVAL;
1050                 }
1051         }
1052
1053         /* Only HW csum features are currently compatible with mac80211 */
1054         if (WARN_ON(hw->netdev_features & ~MAC80211_SUPPORTED_FEATURES))
1055                 return -EINVAL;
1056
1057         if (hw->max_report_rates == 0)
1058                 hw->max_report_rates = hw->max_rates;
1059
1060         local->rx_chains = 1;
1061
1062         /*
1063          * generic code guarantees at least one band,
1064          * set this very early because much code assumes
1065          * that hw.conf.channel is assigned
1066          */
1067         channels = 0;
1068         max_bitrates = 0;
1069         supp_ht = false;
1070         supp_vht = false;
1071         supp_he = false;
1072         supp_eht = false;
1073         for (band = 0; band < NUM_NL80211_BANDS; band++) {
1074                 const struct ieee80211_sband_iftype_data *iftd;
1075                 struct ieee80211_supported_band *sband;
1076
1077                 sband = local->hw.wiphy->bands[band];
1078                 if (!sband)
1079                         continue;
1080
1081                 if (!dflt_chandef.chan) {
1082                         /*
1083                          * Assign the first enabled channel to dflt_chandef
1084                          * from the list of channels
1085                          */
1086                         for (i = 0; i < sband->n_channels; i++)
1087                                 if (!(sband->channels[i].flags &
1088                                                 IEEE80211_CHAN_DISABLED))
1089                                         break;
1090                         /* if none found then use the first anyway */
1091                         if (i == sband->n_channels)
1092                                 i = 0;
1093                         cfg80211_chandef_create(&dflt_chandef,
1094                                                 &sband->channels[i],
1095                                                 NL80211_CHAN_NO_HT);
1096                         /* init channel we're on */
1097                         if (!local->use_chanctx && !local->_oper_chandef.chan) {
1098                                 local->hw.conf.chandef = dflt_chandef;
1099                                 local->_oper_chandef = dflt_chandef;
1100                         }
1101                         local->monitor_chandef = dflt_chandef;
1102                 }
1103
1104                 channels += sband->n_channels;
1105
1106                 /*
1107                  * Due to the way the aggregation code handles this and it
1108                  * being an HT capability, we can't really support delayed
1109                  * BA in MLO (yet).
1110                  */
1111                 if (WARN_ON(sband->ht_cap.ht_supported &&
1112                             (sband->ht_cap.cap & IEEE80211_HT_CAP_DELAY_BA) &&
1113                             hw->wiphy->flags & WIPHY_FLAG_SUPPORTS_MLO))
1114                         return -EINVAL;
1115
1116                 if (max_bitrates < sband->n_bitrates)
1117                         max_bitrates = sband->n_bitrates;
1118                 supp_ht = supp_ht || sband->ht_cap.ht_supported;
1119                 supp_vht = supp_vht || sband->vht_cap.vht_supported;
1120
1121                 for_each_sband_iftype_data(sband, i, iftd) {
1122                         u8 he_40_mhz_cap;
1123
1124                         supp_he = supp_he || iftd->he_cap.has_he;
1125                         supp_eht = supp_eht || iftd->eht_cap.has_eht;
1126
1127                         if (sband->band == NL80211_BAND_2GHZ)
1128                                 he_40_mhz_cap =
1129                                         IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_40MHZ_IN_2G;
1130                         else
1131                                 he_40_mhz_cap =
1132                                         IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_40MHZ_80MHZ_IN_5G;
1133
1134                         /* currently no support for HE client where HT has 40 MHz but not HT */
1135                         if (iftd->he_cap.has_he &&
1136                             iftd->types_mask & (BIT(NL80211_IFTYPE_STATION) |
1137                                                 BIT(NL80211_IFTYPE_P2P_CLIENT)) &&
1138                             sband->ht_cap.ht_supported &&
1139                             sband->ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40 &&
1140                             !(iftd->he_cap.he_cap_elem.phy_cap_info[0] & he_40_mhz_cap))
1141                                 return -EINVAL;
1142                 }
1143
1144                 /* HT, VHT, HE require QoS, thus >= 4 queues */
1145                 if (WARN_ON(local->hw.queues < IEEE80211_NUM_ACS &&
1146                             (supp_ht || supp_vht || supp_he)))
1147                         return -EINVAL;
1148
1149                 /* EHT requires HE support */
1150                 if (WARN_ON(supp_eht && !supp_he))
1151                         return -EINVAL;
1152
1153                 if (!sband->ht_cap.ht_supported)
1154                         continue;
1155
1156                 /* TODO: consider VHT for RX chains, hopefully it's the same */
1157                 local->rx_chains =
1158                         max(ieee80211_mcs_to_chains(&sband->ht_cap.mcs),
1159                             local->rx_chains);
1160
1161                 /* no need to mask, SM_PS_DISABLED has all bits set */
1162                 sband->ht_cap.cap |= WLAN_HT_CAP_SM_PS_DISABLED <<
1163                                      IEEE80211_HT_CAP_SM_PS_SHIFT;
1164         }
1165
1166         /* if low-level driver supports AP, we also support VLAN.
1167          * drivers advertising SW_CRYPTO_CONTROL should enable AP_VLAN
1168          * based on their support to transmit SW encrypted packets.
1169          */
1170         if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_AP) &&
1171             !ieee80211_hw_check(&local->hw, SW_CRYPTO_CONTROL)) {
1172                 hw->wiphy->interface_modes |= BIT(NL80211_IFTYPE_AP_VLAN);
1173                 hw->wiphy->software_iftypes |= BIT(NL80211_IFTYPE_AP_VLAN);
1174         }
1175
1176         /* mac80211 always supports monitor */
1177         hw->wiphy->interface_modes |= BIT(NL80211_IFTYPE_MONITOR);
1178         hw->wiphy->software_iftypes |= BIT(NL80211_IFTYPE_MONITOR);
1179
1180         /* mac80211 doesn't support more than one IBSS interface right now */
1181         for (i = 0; i < hw->wiphy->n_iface_combinations; i++) {
1182                 const struct ieee80211_iface_combination *c;
1183                 int j;
1184
1185                 c = &hw->wiphy->iface_combinations[i];
1186
1187                 for (j = 0; j < c->n_limits; j++)
1188                         if ((c->limits[j].types & BIT(NL80211_IFTYPE_ADHOC)) &&
1189                             c->limits[j].max > 1)
1190                                 return -EINVAL;
1191         }
1192
1193         local->int_scan_req = kzalloc(sizeof(*local->int_scan_req) +
1194                                       sizeof(void *) * channels, GFP_KERNEL);
1195         if (!local->int_scan_req)
1196                 return -ENOMEM;
1197
1198         eth_broadcast_addr(local->int_scan_req->bssid);
1199
1200         for (band = 0; band < NUM_NL80211_BANDS; band++) {
1201                 if (!local->hw.wiphy->bands[band])
1202                         continue;
1203                 local->int_scan_req->rates[band] = (u32) -1;
1204         }
1205
1206 #ifndef CONFIG_MAC80211_MESH
1207         /* mesh depends on Kconfig, but drivers should set it if they want */
1208         local->hw.wiphy->interface_modes &= ~BIT(NL80211_IFTYPE_MESH_POINT);
1209 #endif
1210
1211         /* if the underlying driver supports mesh, mac80211 will (at least)
1212          * provide routing of mesh authentication frames to userspace */
1213         if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_MESH_POINT))
1214                 local->hw.wiphy->flags |= WIPHY_FLAG_MESH_AUTH;
1215
1216         /* mac80211 supports control port protocol changing */
1217         local->hw.wiphy->flags |= WIPHY_FLAG_CONTROL_PORT_PROTOCOL;
1218
1219         if (ieee80211_hw_check(&local->hw, SIGNAL_DBM)) {
1220                 local->hw.wiphy->signal_type = CFG80211_SIGNAL_TYPE_MBM;
1221         } else if (ieee80211_hw_check(&local->hw, SIGNAL_UNSPEC)) {
1222                 local->hw.wiphy->signal_type = CFG80211_SIGNAL_TYPE_UNSPEC;
1223                 if (hw->max_signal <= 0) {
1224                         result = -EINVAL;
1225                         goto fail_workqueue;
1226                 }
1227         }
1228
1229         /* Mac80211 and therefore all drivers using SW crypto only
1230          * are able to handle PTK rekeys and Extended Key ID.
1231          */
1232         if (!local->ops->set_key) {
1233                 wiphy_ext_feature_set(local->hw.wiphy,
1234                                       NL80211_EXT_FEATURE_CAN_REPLACE_PTK0);
1235                 wiphy_ext_feature_set(local->hw.wiphy,
1236                                       NL80211_EXT_FEATURE_EXT_KEY_ID);
1237         }
1238
1239         if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_ADHOC))
1240                 wiphy_ext_feature_set(local->hw.wiphy,
1241                                       NL80211_EXT_FEATURE_DEL_IBSS_STA);
1242
1243         /*
1244          * Calculate scan IE length -- we need this to alloc
1245          * memory and to subtract from the driver limit. It
1246          * includes the DS Params, (extended) supported rates, and HT
1247          * information -- SSID is the driver's responsibility.
1248          */
1249         local->scan_ies_len = 4 + max_bitrates /* (ext) supp rates */ +
1250                 3 /* DS Params */;
1251         if (supp_ht)
1252                 local->scan_ies_len += 2 + sizeof(struct ieee80211_ht_cap);
1253
1254         if (supp_vht)
1255                 local->scan_ies_len +=
1256                         2 + sizeof(struct ieee80211_vht_cap);
1257
1258         /*
1259          * HE cap element is variable in size - set len to allow max size */
1260         if (supp_he) {
1261                 local->scan_ies_len +=
1262                         3 + sizeof(struct ieee80211_he_cap_elem) +
1263                         sizeof(struct ieee80211_he_mcs_nss_supp) +
1264                         IEEE80211_HE_PPE_THRES_MAX_LEN;
1265
1266                 if (supp_eht)
1267                         local->scan_ies_len +=
1268                                 3 + sizeof(struct ieee80211_eht_cap_elem) +
1269                                 sizeof(struct ieee80211_eht_mcs_nss_supp) +
1270                                 IEEE80211_EHT_PPE_THRES_MAX_LEN;
1271         }
1272
1273         if (!local->ops->hw_scan) {
1274                 /* For hw_scan, driver needs to set these up. */
1275                 local->hw.wiphy->max_scan_ssids = 4;
1276                 local->hw.wiphy->max_scan_ie_len = IEEE80211_MAX_DATA_LEN;
1277         }
1278
1279         /*
1280          * If the driver supports any scan IEs, then assume the
1281          * limit includes the IEs mac80211 will add, otherwise
1282          * leave it at zero and let the driver sort it out; we
1283          * still pass our IEs to the driver but userspace will
1284          * not be allowed to in that case.
1285          */
1286         if (local->hw.wiphy->max_scan_ie_len)
1287                 local->hw.wiphy->max_scan_ie_len -= local->scan_ies_len;
1288
1289         result = ieee80211_init_cipher_suites(local);
1290         if (result < 0)
1291                 goto fail_workqueue;
1292
1293         if (!local->ops->remain_on_channel)
1294                 local->hw.wiphy->max_remain_on_channel_duration = 5000;
1295
1296         /* mac80211 based drivers don't support internal TDLS setup */
1297         if (local->hw.wiphy->flags & WIPHY_FLAG_SUPPORTS_TDLS)
1298                 local->hw.wiphy->flags |= WIPHY_FLAG_TDLS_EXTERNAL_SETUP;
1299
1300         /* mac80211 supports eCSA, if the driver supports STA CSA at all */
1301         if (ieee80211_hw_check(&local->hw, CHANCTX_STA_CSA))
1302                 local->ext_capa[0] |= WLAN_EXT_CAPA1_EXT_CHANNEL_SWITCHING;
1303
1304         /* mac80211 supports multi BSSID, if the driver supports it */
1305         if (ieee80211_hw_check(&local->hw, SUPPORTS_MULTI_BSSID)) {
1306                 local->hw.wiphy->support_mbssid = true;
1307                 if (ieee80211_hw_check(&local->hw,
1308                                        SUPPORTS_ONLY_HE_MULTI_BSSID))
1309                         local->hw.wiphy->support_only_he_mbssid = true;
1310                 else
1311                         local->ext_capa[2] |=
1312                                 WLAN_EXT_CAPA3_MULTI_BSSID_SUPPORT;
1313         }
1314
1315         local->hw.wiphy->max_num_csa_counters = IEEE80211_MAX_CNTDWN_COUNTERS_NUM;
1316
1317         /*
1318          * We use the number of queues for feature tests (QoS, HT) internally
1319          * so restrict them appropriately.
1320          */
1321         if (hw->queues > IEEE80211_MAX_QUEUES)
1322                 hw->queues = IEEE80211_MAX_QUEUES;
1323
1324         local->workqueue =
1325                 alloc_ordered_workqueue("%s", 0, wiphy_name(local->hw.wiphy));
1326         if (!local->workqueue) {
1327                 result = -ENOMEM;
1328                 goto fail_workqueue;
1329         }
1330
1331         /*
1332          * The hardware needs headroom for sending the frame,
1333          * and we need some headroom for passing the frame to monitor
1334          * interfaces, but never both at the same time.
1335          */
1336         local->tx_headroom = max_t(unsigned int , local->hw.extra_tx_headroom,
1337                                    IEEE80211_TX_STATUS_HEADROOM);
1338
1339         /*
1340          * if the driver doesn't specify a max listen interval we
1341          * use 5 which should be a safe default
1342          */
1343         if (local->hw.max_listen_interval == 0)
1344                 local->hw.max_listen_interval = 5;
1345
1346         local->hw.conf.listen_interval = local->hw.max_listen_interval;
1347
1348         local->dynamic_ps_forced_timeout = -1;
1349
1350         if (!local->hw.max_nan_de_entries)
1351                 local->hw.max_nan_de_entries = IEEE80211_MAX_NAN_INSTANCE_ID;
1352
1353         if (!local->hw.weight_multiplier)
1354                 local->hw.weight_multiplier = 1;
1355
1356         ieee80211_wep_init(local);
1357
1358         local->hw.conf.flags = IEEE80211_CONF_IDLE;
1359
1360         ieee80211_led_init(local);
1361
1362         result = ieee80211_txq_setup_flows(local);
1363         if (result)
1364                 goto fail_flows;
1365
1366         rtnl_lock();
1367         result = ieee80211_init_rate_ctrl_alg(local,
1368                                               hw->rate_control_algorithm);
1369         rtnl_unlock();
1370         if (result < 0) {
1371                 wiphy_debug(local->hw.wiphy,
1372                             "Failed to initialize rate control algorithm\n");
1373                 goto fail_rate;
1374         }
1375
1376         if (local->rate_ctrl) {
1377                 clear_bit(IEEE80211_HW_SUPPORTS_VHT_EXT_NSS_BW, hw->flags);
1378                 if (local->rate_ctrl->ops->capa & RATE_CTRL_CAPA_VHT_EXT_NSS_BW)
1379                         ieee80211_hw_set(hw, SUPPORTS_VHT_EXT_NSS_BW);
1380         }
1381
1382         /*
1383          * If the VHT capabilities don't have IEEE80211_VHT_EXT_NSS_BW_CAPABLE,
1384          * or have it when we don't, copy the sband structure and set/clear it.
1385          * This is necessary because rate scaling algorithms could be switched
1386          * and have different support values.
1387          * Print a message so that in the common case the reallocation can be
1388          * avoided.
1389          */
1390         BUILD_BUG_ON(NUM_NL80211_BANDS > 8 * sizeof(local->sband_allocated));
1391         for (band = 0; band < NUM_NL80211_BANDS; band++) {
1392                 struct ieee80211_supported_band *sband;
1393                 bool local_cap, ie_cap;
1394
1395                 local_cap = ieee80211_hw_check(hw, SUPPORTS_VHT_EXT_NSS_BW);
1396
1397                 sband = local->hw.wiphy->bands[band];
1398                 if (!sband || !sband->vht_cap.vht_supported)
1399                         continue;
1400
1401                 ie_cap = !!(sband->vht_cap.vht_mcs.tx_highest &
1402                             cpu_to_le16(IEEE80211_VHT_EXT_NSS_BW_CAPABLE));
1403
1404                 if (local_cap == ie_cap)
1405                         continue;
1406
1407                 sband = kmemdup(sband, sizeof(*sband), GFP_KERNEL);
1408                 if (!sband) {
1409                         result = -ENOMEM;
1410                         goto fail_rate;
1411                 }
1412
1413                 wiphy_dbg(hw->wiphy, "copying sband (band %d) due to VHT EXT NSS BW flag\n",
1414                           band);
1415
1416                 sband->vht_cap.vht_mcs.tx_highest ^=
1417                         cpu_to_le16(IEEE80211_VHT_EXT_NSS_BW_CAPABLE);
1418
1419                 local->hw.wiphy->bands[band] = sband;
1420                 local->sband_allocated |= BIT(band);
1421         }
1422
1423         result = wiphy_register(local->hw.wiphy);
1424         if (result < 0)
1425                 goto fail_wiphy_register;
1426
1427         debugfs_hw_add(local);
1428         rate_control_add_debugfs(local);
1429
1430         ieee80211_check_wbrf_support(local);
1431
1432         rtnl_lock();
1433         wiphy_lock(hw->wiphy);
1434
1435         /* add one default STA interface if supported */
1436         if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_STATION) &&
1437             !ieee80211_hw_check(hw, NO_AUTO_VIF)) {
1438                 struct vif_params params = {0};
1439
1440                 result = ieee80211_if_add(local, "wlan%d", NET_NAME_ENUM, NULL,
1441                                           NL80211_IFTYPE_STATION, &params);
1442                 if (result)
1443                         wiphy_warn(local->hw.wiphy,
1444                                    "Failed to add default virtual iface\n");
1445         }
1446
1447         wiphy_unlock(hw->wiphy);
1448         rtnl_unlock();
1449
1450 #ifdef CONFIG_INET
1451         local->ifa_notifier.notifier_call = ieee80211_ifa_changed;
1452         result = register_inetaddr_notifier(&local->ifa_notifier);
1453         if (result)
1454                 goto fail_ifa;
1455 #endif
1456
1457 #if IS_ENABLED(CONFIG_IPV6)
1458         local->ifa6_notifier.notifier_call = ieee80211_ifa6_changed;
1459         result = register_inet6addr_notifier(&local->ifa6_notifier);
1460         if (result)
1461                 goto fail_ifa6;
1462 #endif
1463
1464         return 0;
1465
1466 #if IS_ENABLED(CONFIG_IPV6)
1467  fail_ifa6:
1468 #ifdef CONFIG_INET
1469         unregister_inetaddr_notifier(&local->ifa_notifier);
1470 #endif
1471 #endif
1472 #if defined(CONFIG_INET) || defined(CONFIG_IPV6)
1473  fail_ifa:
1474 #endif
1475         wiphy_unregister(local->hw.wiphy);
1476  fail_wiphy_register:
1477         rtnl_lock();
1478         rate_control_deinitialize(local);
1479         ieee80211_remove_interfaces(local);
1480         rtnl_unlock();
1481  fail_rate:
1482         ieee80211_txq_teardown_flows(local);
1483  fail_flows:
1484         ieee80211_led_exit(local);
1485         destroy_workqueue(local->workqueue);
1486  fail_workqueue:
1487         if (local->wiphy_ciphers_allocated) {
1488                 kfree(local->hw.wiphy->cipher_suites);
1489                 local->wiphy_ciphers_allocated = false;
1490         }
1491         kfree(local->int_scan_req);
1492         return result;
1493 }
1494 EXPORT_SYMBOL(ieee80211_register_hw);
1495
1496 void ieee80211_unregister_hw(struct ieee80211_hw *hw)
1497 {
1498         struct ieee80211_local *local = hw_to_local(hw);
1499
1500         tasklet_kill(&local->tx_pending_tasklet);
1501         tasklet_kill(&local->tasklet);
1502
1503 #ifdef CONFIG_INET
1504         unregister_inetaddr_notifier(&local->ifa_notifier);
1505 #endif
1506 #if IS_ENABLED(CONFIG_IPV6)
1507         unregister_inet6addr_notifier(&local->ifa6_notifier);
1508 #endif
1509
1510         rtnl_lock();
1511
1512         /*
1513          * At this point, interface list manipulations are fine
1514          * because the driver cannot be handing us frames any
1515          * more and the tasklet is killed.
1516          */
1517         ieee80211_remove_interfaces(local);
1518
1519         ieee80211_txq_teardown_flows(local);
1520
1521         wiphy_lock(local->hw.wiphy);
1522         wiphy_delayed_work_cancel(local->hw.wiphy, &local->roc_work);
1523         wiphy_work_cancel(local->hw.wiphy, &local->reconfig_filter);
1524         wiphy_work_cancel(local->hw.wiphy, &local->sched_scan_stopped_work);
1525         wiphy_work_cancel(local->hw.wiphy, &local->radar_detected_work);
1526         wiphy_unlock(local->hw.wiphy);
1527         rtnl_unlock();
1528
1529         cancel_work_sync(&local->restart_work);
1530
1531         ieee80211_clear_tx_pending(local);
1532         rate_control_deinitialize(local);
1533
1534         if (skb_queue_len(&local->skb_queue) ||
1535             skb_queue_len(&local->skb_queue_unreliable))
1536                 wiphy_warn(local->hw.wiphy, "skb_queue not empty\n");
1537         skb_queue_purge(&local->skb_queue);
1538         skb_queue_purge(&local->skb_queue_unreliable);
1539
1540         wiphy_unregister(local->hw.wiphy);
1541         destroy_workqueue(local->workqueue);
1542         ieee80211_led_exit(local);
1543         kfree(local->int_scan_req);
1544 }
1545 EXPORT_SYMBOL(ieee80211_unregister_hw);
1546
1547 static int ieee80211_free_ack_frame(int id, void *p, void *data)
1548 {
1549         WARN_ONCE(1, "Have pending ack frames!\n");
1550         kfree_skb(p);
1551         return 0;
1552 }
1553
1554 void ieee80211_free_hw(struct ieee80211_hw *hw)
1555 {
1556         struct ieee80211_local *local = hw_to_local(hw);
1557         enum nl80211_band band;
1558
1559         mutex_destroy(&local->iflist_mtx);
1560
1561         if (local->wiphy_ciphers_allocated) {
1562                 kfree(local->hw.wiphy->cipher_suites);
1563                 local->wiphy_ciphers_allocated = false;
1564         }
1565
1566         idr_for_each(&local->ack_status_frames,
1567                      ieee80211_free_ack_frame, NULL);
1568         idr_destroy(&local->ack_status_frames);
1569
1570         sta_info_stop(local);
1571
1572         ieee80211_free_led_names(local);
1573
1574         for (band = 0; band < NUM_NL80211_BANDS; band++) {
1575                 if (!(local->sband_allocated & BIT(band)))
1576                         continue;
1577                 kfree(local->hw.wiphy->bands[band]);
1578         }
1579
1580         wiphy_free(local->hw.wiphy);
1581 }
1582 EXPORT_SYMBOL(ieee80211_free_hw);
1583
1584 static const char * const drop_reasons_monitor[] = {
1585 #define V(x)    #x,
1586         [0] = "RX_DROP_MONITOR",
1587         MAC80211_DROP_REASONS_MONITOR(V)
1588 };
1589
1590 static struct drop_reason_list drop_reason_list_monitor = {
1591         .reasons = drop_reasons_monitor,
1592         .n_reasons = ARRAY_SIZE(drop_reasons_monitor),
1593 };
1594
1595 static const char * const drop_reasons_unusable[] = {
1596         [0] = "RX_DROP_UNUSABLE",
1597         MAC80211_DROP_REASONS_UNUSABLE(V)
1598 #undef V
1599 };
1600
1601 static struct drop_reason_list drop_reason_list_unusable = {
1602         .reasons = drop_reasons_unusable,
1603         .n_reasons = ARRAY_SIZE(drop_reasons_unusable),
1604 };
1605
1606 static int __init ieee80211_init(void)
1607 {
1608         struct sk_buff *skb;
1609         int ret;
1610
1611         BUILD_BUG_ON(sizeof(struct ieee80211_tx_info) > sizeof(skb->cb));
1612         BUILD_BUG_ON(offsetof(struct ieee80211_tx_info, driver_data) +
1613                      IEEE80211_TX_INFO_DRIVER_DATA_SIZE > sizeof(skb->cb));
1614
1615         ret = rc80211_minstrel_init();
1616         if (ret)
1617                 return ret;
1618
1619         ret = ieee80211_iface_init();
1620         if (ret)
1621                 goto err_netdev;
1622
1623         drop_reasons_register_subsys(SKB_DROP_REASON_SUBSYS_MAC80211_MONITOR,
1624                                      &drop_reason_list_monitor);
1625         drop_reasons_register_subsys(SKB_DROP_REASON_SUBSYS_MAC80211_UNUSABLE,
1626                                      &drop_reason_list_unusable);
1627
1628         return 0;
1629  err_netdev:
1630         rc80211_minstrel_exit();
1631
1632         return ret;
1633 }
1634
1635 static void __exit ieee80211_exit(void)
1636 {
1637         rc80211_minstrel_exit();
1638
1639         ieee80211s_stop();
1640
1641         ieee80211_iface_exit();
1642
1643         drop_reasons_unregister_subsys(SKB_DROP_REASON_SUBSYS_MAC80211_MONITOR);
1644         drop_reasons_unregister_subsys(SKB_DROP_REASON_SUBSYS_MAC80211_UNUSABLE);
1645
1646         rcu_barrier();
1647 }
1648
1649
1650 subsys_initcall(ieee80211_init);
1651 module_exit(ieee80211_exit);
1652
1653 MODULE_DESCRIPTION("IEEE 802.11 subsystem");
1654 MODULE_LICENSE("GPL");