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 <[email protected]>
   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_calc_hw_conf_chan(struct ieee80211_local *local,
  97                                        struct ieee80211_chanctx_conf *ctx)
  98 {
  99         struct ieee80211_sub_if_data *sdata;
 100         struct cfg80211_chan_def chandef = {};
 101         struct cfg80211_chan_def *oper = NULL;
 102         enum ieee80211_smps_mode smps_mode = IEEE80211_SMPS_STATIC;
 103         u32 changed = 0;
 104         int power;
 105         u32 offchannel_flag;
 106
 107         if (!local->emulate_chanctx)
 108                 return 0;
 109
 110         offchannel_flag = local->hw.conf.flags & IEEE80211_CONF_OFFCHANNEL;
 111
 112         if (ctx && !WARN_ON(!ctx->def.chan)) {
 113                 oper = &ctx->def;
 114                 if (ctx->rx_chains_static > 1)
 115                         smps_mode = IEEE80211_SMPS_OFF;
 116                 else if (ctx->rx_chains_dynamic > 1)
 117                         smps_mode = IEEE80211_SMPS_DYNAMIC;
 118                 else
 119                         smps_mode = IEEE80211_SMPS_STATIC;
 120         }
 121
 122         if (local->scan_chandef.chan) {
 123                 chandef = local->scan_chandef;
 124         } else if (local->tmp_channel) {
 125                 chandef.chan = local->tmp_channel;
 126                 chandef.width = NL80211_CHAN_WIDTH_20_NOHT;
 127                 chandef.center_freq1 = chandef.chan->center_freq;
 128                 chandef.freq1_offset = chandef.chan->freq_offset;
 129         } else if (oper) {
 130                 chandef = *oper;
 131         } else {
 132                 chandef = local->dflt_chandef;
 133         }
 134
 135         if (WARN(!cfg80211_chandef_valid(&chandef),
 136                  "control:%d.%03d MHz width:%d center: %d.%03d/%d MHz",
 137                  chandef.chan ? chandef.chan->center_freq : -1,
 138                  chandef.chan ? chandef.chan->freq_offset : 0,
 139                  chandef.width, chandef.center_freq1, chandef.freq1_offset,
 140                  chandef.center_freq2))
 141                 return 0;
 142
 143         if (!oper || !cfg80211_chandef_identical(&chandef, oper))
 144                 local->hw.conf.flags |= IEEE80211_CONF_OFFCHANNEL;
 145         else
 146                 local->hw.conf.flags &= ~IEEE80211_CONF_OFFCHANNEL;
 147
 148         offchannel_flag ^= local->hw.conf.flags & IEEE80211_CONF_OFFCHANNEL;
 149
 150         /* force it also for scanning, since drivers might config differently */
 151         if (offchannel_flag || local->scanning || local->in_reconfig ||
 152             !cfg80211_chandef_identical(&local->hw.conf.chandef, &chandef)) {
 153                 local->hw.conf.chandef = chandef;
 154                 changed |= IEEE80211_CONF_CHANGE_CHANNEL;
 155         }
 156
 157         if (!conf_is_ht(&local->hw.conf)) {
 158                 /*
 159                  * mac80211.h documents that this is only valid
 160                  * when the channel is set to an HT type, and
 161                  * that otherwise STATIC is used.
 162                  */
 163                 local->hw.conf.smps_mode = IEEE80211_SMPS_STATIC;
 164         } else if (local->hw.conf.smps_mode != smps_mode) {
 165                 local->hw.conf.smps_mode = smps_mode;
 166                 changed |= IEEE80211_CONF_CHANGE_SMPS;
 167         }
 168
 169         power = ieee80211_chandef_max_power(&chandef);
 170         if (local->user_power_level != IEEE80211_UNSET_POWER_LEVEL)
 171                 power = min(local->user_power_level, power);
 172
 173         rcu_read_lock();
 174         list_for_each_entry_rcu(sdata, &local->interfaces, list) {
 175                 if (!rcu_access_pointer(sdata->vif.bss_conf.chanctx_conf))
 176                         continue;
 177                 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
 178                         continue;
 179                 if (sdata->vif.bss_conf.txpower == INT_MIN)
 180                         continue;
 181                 power = min(power, sdata->vif.bss_conf.txpower);
 182         }
 183         rcu_read_unlock();
 184
 185         if (local->hw.conf.power_level != power) {
 186                 changed |= IEEE80211_CONF_CHANGE_POWER;
 187                 local->hw.conf.power_level = power;
 188         }
 189
 190         return changed;
 191 }
 192
 193 int ieee80211_hw_config(struct ieee80211_local *local, u32 changed)
 194 {
 195         int ret = 0;
 196
 197         might_sleep();
 198
 199         WARN_ON(changed & (IEEE80211_CONF_CHANGE_CHANNEL |
 200                            IEEE80211_CONF_CHANGE_POWER |
 201                            IEEE80211_CONF_CHANGE_SMPS));
 202
 203         if (changed && local->open_count) {
 204                 ret = drv_config(local, changed);
 205                 /*
 206                  * Goal:
 207                  * HW reconfiguration should never fail, the driver has told
 208                  * us what it can support so it should live up to that promise.
 209                  *
 210                  * Current status:
 211                  * rfkill is not integrated with mac80211 and a
 212                  * configuration command can thus fail if hardware rfkill
 213                  * is enabled
 214                  *
 215                  * FIXME: integrate rfkill with mac80211 and then add this
 216                  * WARN_ON() back
 217                  *
 218                  */
 219                 /* WARN_ON(ret); */
 220         }
 221
 222         return ret;
 223 }
 224
 225 /* for scanning, offchannel and chanctx emulation only */
 226 static int _ieee80211_hw_conf_chan(struct ieee80211_local *local,
 227                                    struct ieee80211_chanctx_conf *ctx)
 228 {
 229         u32 changed;
 230
 231         if (!local->open_count)
 232                 return 0;
 233
 234         changed = ieee80211_calc_hw_conf_chan(local, ctx);
 235         if (!changed)
 236                 return 0;
 237
 238         return drv_config(local, changed);
 239 }
 240
 241 int ieee80211_hw_conf_chan(struct ieee80211_local *local)
 242 {
 243         struct ieee80211_chanctx *ctx;
 244
 245         ctx = list_first_entry_or_null(&local->chanctx_list,
 246                                        struct ieee80211_chanctx,
 247                                        list);
 248
 249         return _ieee80211_hw_conf_chan(local, ctx ? &ctx->conf : NULL);
 250 }
 251
 252 void ieee80211_hw_conf_init(struct ieee80211_local *local)
 253 {
 254         u32 changed = ~(IEEE80211_CONF_CHANGE_CHANNEL |
 255                         IEEE80211_CONF_CHANGE_POWER |
 256                         IEEE80211_CONF_CHANGE_SMPS);
 257
 258         if (WARN_ON(!local->open_count))
 259                 return;
 260
 261         if (local->emulate_chanctx) {
 262                 struct ieee80211_chanctx *ctx;
 263
 264                 ctx = list_first_entry_or_null(&local->chanctx_list,
 265                                                struct ieee80211_chanctx,
 266                                                list);
 267
 268                 changed |= ieee80211_calc_hw_conf_chan(local,
 269                                                        ctx ? &ctx->conf : NULL);
 270         }
 271
 272         WARN_ON(drv_config(local, changed));
 273 }
 274
 275 int ieee80211_emulate_add_chanctx(struct ieee80211_hw *hw,
 276                                   struct ieee80211_chanctx_conf *ctx)
 277 {
 278         struct ieee80211_local *local = hw_to_local(hw);
 279
 280         local->hw.conf.radar_enabled = ctx->radar_enabled;
 281
 282         return _ieee80211_hw_conf_chan(local, ctx);
 283 }
 284 EXPORT_SYMBOL(ieee80211_emulate_add_chanctx);
 285
 286 void ieee80211_emulate_remove_chanctx(struct ieee80211_hw *hw,
 287                                       struct ieee80211_chanctx_conf *ctx)
 288 {
 289         struct ieee80211_local *local = hw_to_local(hw);
 290
 291         local->hw.conf.radar_enabled = false;
 292
 293         _ieee80211_hw_conf_chan(local, NULL);
 294 }
 295 EXPORT_SYMBOL(ieee80211_emulate_remove_chanctx);
 296
 297 void ieee80211_emulate_change_chanctx(struct ieee80211_hw *hw,
 298                                       struct ieee80211_chanctx_conf *ctx,
 299                                       u32 changed)
 300 {
 301         struct ieee80211_local *local = hw_to_local(hw);
 302
 303         local->hw.conf.radar_enabled = ctx->radar_enabled;
 304
 305         _ieee80211_hw_conf_chan(local, ctx);
 306 }
 307 EXPORT_SYMBOL(ieee80211_emulate_change_chanctx);
 308
 309 int ieee80211_emulate_switch_vif_chanctx(struct ieee80211_hw *hw,
 310                                          struct ieee80211_vif_chanctx_switch *vifs,
 311                                          int n_vifs,
 312                                          enum ieee80211_chanctx_switch_mode mode)
 313 {
 314         struct ieee80211_local *local = hw_to_local(hw);
 315
 316         if (n_vifs <= 0)
 317                 return -EINVAL;
 318
 319         local->hw.conf.radar_enabled = vifs[0].new_ctx->radar_enabled;
 320         _ieee80211_hw_conf_chan(local, vifs[0].new_ctx);
 321
 322         return 0;
 323 }
 324 EXPORT_SYMBOL(ieee80211_emulate_switch_vif_chanctx);
 325
 326 #define BSS_CHANGED_VIF_CFG_FLAGS (BSS_CHANGED_ASSOC |\
 327                                    BSS_CHANGED_IDLE |\
 328                                    BSS_CHANGED_PS |\
 329                                    BSS_CHANGED_IBSS |\
 330                                    BSS_CHANGED_ARP_FILTER |\
 331                                    BSS_CHANGED_SSID |\
 332                                    BSS_CHANGED_MLD_VALID_LINKS |\
 333                                    BSS_CHANGED_MLD_TTLM)
 334
 335 void ieee80211_bss_info_change_notify(struct ieee80211_sub_if_data *sdata,
 336                                       u64 changed)
 337 {
 338         struct ieee80211_local *local = sdata->local;
 339
 340         might_sleep();
 341
 342         WARN_ON_ONCE(ieee80211_vif_is_mld(&sdata->vif));
 343
 344         if (!changed || sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
 345                 return;
 346
 347         if (WARN_ON_ONCE(changed & (BSS_CHANGED_BEACON |
 348                                     BSS_CHANGED_BEACON_ENABLED) &&
 349                          sdata->vif.type != NL80211_IFTYPE_AP &&
 350                          sdata->vif.type != NL80211_IFTYPE_ADHOC &&
 351                          sdata->vif.type != NL80211_IFTYPE_MESH_POINT &&
 352                          sdata->vif.type != NL80211_IFTYPE_OCB))
 353                 return;
 354
 355         if (WARN_ON_ONCE(sdata->vif.type == NL80211_IFTYPE_P2P_DEVICE ||
 356                          sdata->vif.type == NL80211_IFTYPE_NAN ||
 357                          (sdata->vif.type == NL80211_IFTYPE_MONITOR &&
 358                           !sdata->vif.bss_conf.mu_mimo_owner &&
 359                           !(changed & BSS_CHANGED_TXPOWER))))
 360                 return;
 361
 362         if (!check_sdata_in_driver(sdata))
 363                 return;
 364
 365         if (changed & BSS_CHANGED_VIF_CFG_FLAGS) {
 366                 u64 ch = changed & BSS_CHANGED_VIF_CFG_FLAGS;
 367
 368                 trace_drv_vif_cfg_changed(local, sdata, changed);
 369                 if (local->ops->vif_cfg_changed)
 370                         local->ops->vif_cfg_changed(&local->hw, &sdata->vif, ch);
 371         }
 372
 373         if (changed & ~BSS_CHANGED_VIF_CFG_FLAGS) {
 374                 u64 ch = changed & ~BSS_CHANGED_VIF_CFG_FLAGS;
 375
 376                 trace_drv_link_info_changed(local, sdata, &sdata->vif.bss_conf,
 377                                             changed);
 378                 if (local->ops->link_info_changed)
 379                         local->ops->link_info_changed(&local->hw, &sdata->vif,
 380                                                       &sdata->vif.bss_conf, ch);
 381         }
 382
 383         if (local->ops->bss_info_changed)
 384                 local->ops->bss_info_changed(&local->hw, &sdata->vif,
 385                                              &sdata->vif.bss_conf, changed);
 386         trace_drv_return_void(local);
 387 }
 388
 389 void ieee80211_vif_cfg_change_notify(struct ieee80211_sub_if_data *sdata,
 390                                      u64 changed)
 391 {
 392         struct ieee80211_local *local = sdata->local;
 393
 394         WARN_ON_ONCE(changed & ~BSS_CHANGED_VIF_CFG_FLAGS);
 395
 396         if (!changed || sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
 397                 return;
 398
 399         drv_vif_cfg_changed(local, sdata, changed);
 400 }
 401
 402 void ieee80211_link_info_change_notify(struct ieee80211_sub_if_data *sdata,
 403                                        struct ieee80211_link_data *link,
 404                                        u64 changed)
 405 {
 406         struct ieee80211_local *local = sdata->local;
 407
 408         WARN_ON_ONCE(changed & BSS_CHANGED_VIF_CFG_FLAGS);
 409
 410         if (!changed || sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
 411                 return;
 412
 413         if (!check_sdata_in_driver(sdata))
 414                 return;
 415
 416         drv_link_info_changed(local, sdata, link->conf, link->link_id, changed);
 417 }
 418
 419 u64 ieee80211_reset_erp_info(struct ieee80211_sub_if_data *sdata)
 420 {
 421         sdata->vif.bss_conf.use_cts_prot = false;
 422         sdata->vif.bss_conf.use_short_preamble = false;
 423         sdata->vif.bss_conf.use_short_slot = false;
 424         return BSS_CHANGED_ERP_CTS_PROT |
 425                BSS_CHANGED_ERP_PREAMBLE |
 426                BSS_CHANGED_ERP_SLOT;
 427 }
 428
 429 /* context: requires softirqs disabled */
 430 void ieee80211_handle_queued_frames(struct ieee80211_local *local)
 431 {
 432         struct sk_buff *skb;
 433
 434         while ((skb = skb_dequeue(&local->skb_queue)) ||
 435                (skb = skb_dequeue(&local->skb_queue_unreliable))) {
 436                 switch (skb->pkt_type) {
 437                 case IEEE80211_RX_MSG:
 438                         /* Clear skb->pkt_type in order to not confuse kernel
 439                          * netstack. */
 440                         skb->pkt_type = 0;
 441                         ieee80211_rx(&local->hw, skb);
 442                         break;
 443                 case IEEE80211_TX_STATUS_MSG:
 444                         skb->pkt_type = 0;
 445                         ieee80211_tx_status_skb(&local->hw, skb);
 446                         break;
 447                 default:
 448                         WARN(1, "mac80211: Packet is of unknown type %d\n",
 449                              skb->pkt_type);
 450                         dev_kfree_skb(skb);
 451                         break;
 452                 }
 453         }
 454 }
 455
 456 static void ieee80211_tasklet_handler(struct tasklet_struct *t)
 457 {
 458         struct ieee80211_local *local = from_tasklet(local, t, tasklet);
 459
 460         ieee80211_handle_queued_frames(local);
 461 }
 462
 463 static void ieee80211_restart_work(struct work_struct *work)
 464 {
 465         struct ieee80211_local *local =
 466                 container_of(work, struct ieee80211_local, restart_work);
 467         struct ieee80211_sub_if_data *sdata;
 468         int ret;
 469
 470         flush_workqueue(local->workqueue);
 471
 472         rtnl_lock();
 473         /* we might do interface manipulations, so need both */
 474         wiphy_lock(local->hw.wiphy);
 475         wiphy_work_flush(local->hw.wiphy, NULL);
 476
 477         WARN(test_bit(SCAN_HW_SCANNING, &local->scanning),
 478              "%s called with hardware scan in progress\n", __func__);
 479
 480         list_for_each_entry(sdata, &local->interfaces, list) {
 481                 /*
 482                  * XXX: there may be more work for other vif types and even
 483                  * for station mode: a good thing would be to run most of
 484                  * the iface type's dependent _stop (ieee80211_mg_stop,
 485                  * ieee80211_ibss_stop) etc...
 486                  * For now, fix only the specific bug that was seen: race
 487                  * between csa_connection_drop_work and us.
 488                  */
 489                 if (sdata->vif.type == NL80211_IFTYPE_STATION) {
 490                         /*
 491                          * This worker is scheduled from the iface worker that
 492                          * runs on mac80211's workqueue, so we can't be
 493                          * scheduling this worker after the cancel right here.
 494                          * The exception is ieee80211_chswitch_done.
 495                          * Then we can have a race...
 496                          */
 497                         wiphy_work_cancel(local->hw.wiphy,
 498                                           &sdata->u.mgd.csa_connection_drop_work);
 499                         if (sdata->vif.bss_conf.csa_active)
 500                                 ieee80211_sta_connection_lost(sdata,
 501                                                               WLAN_REASON_UNSPECIFIED,
 502                                                               false);
 503                 }
 504                 wiphy_delayed_work_flush(local->hw.wiphy,
 505                                          &sdata->dec_tailroom_needed_wk);
 506         }
 507         ieee80211_scan_cancel(local);
 508
 509         /* make sure any new ROC will consider local->in_reconfig */
 510         wiphy_delayed_work_flush(local->hw.wiphy, &local->roc_work);
 511         wiphy_work_flush(local->hw.wiphy, &local->hw_roc_done);
 512
 513         /* wait for all packet processing to be done */
 514         synchronize_net();
 515
 516         ret = ieee80211_reconfig(local);
 517         wiphy_unlock(local->hw.wiphy);
 518
 519         if (ret)
 520                 cfg80211_shutdown_all_interfaces(local->hw.wiphy);
 521
 522         rtnl_unlock();
 523 }
 524
 525 void ieee80211_restart_hw(struct ieee80211_hw *hw)
 526 {
 527         struct ieee80211_local *local = hw_to_local(hw);
 528
 529         trace_api_restart_hw(local);
 530
 531         wiphy_info(hw->wiphy,
 532                    "Hardware restart was requested\n");
 533
 534         /* use this reason, ieee80211_reconfig will unblock it */
 535         ieee80211_stop_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP,
 536                                         IEEE80211_QUEUE_STOP_REASON_SUSPEND,
 537                                         false);
 538
 539         /*
 540          * Stop all Rx during the reconfig. We don't want state changes
 541          * or driver callbacks while this is in progress.
 542          */
 543         local->in_reconfig = true;
 544         barrier();
 545
 546         queue_work(system_freezable_wq, &local->restart_work);
 547 }
 548 EXPORT_SYMBOL(ieee80211_restart_hw);
 549
 550 #ifdef CONFIG_INET
 551 static int ieee80211_ifa_changed(struct notifier_block *nb,
 552                                  unsigned long data, void *arg)
 553 {
 554         struct in_ifaddr *ifa = arg;
 555         struct ieee80211_local *local =
 556                 container_of(nb, struct ieee80211_local,
 557                              ifa_notifier);
 558         struct net_device *ndev = ifa->ifa_dev->dev;
 559         struct wireless_dev *wdev = ndev->ieee80211_ptr;
 560         struct in_device *idev;
 561         struct ieee80211_sub_if_data *sdata;
 562         struct ieee80211_vif_cfg *vif_cfg;
 563         struct ieee80211_if_managed *ifmgd;
 564         int c = 0;
 565
 566         /* Make sure it's our interface that got changed */
 567         if (!wdev)
 568                 return NOTIFY_DONE;
 569
 570         if (wdev->wiphy != local->hw.wiphy || !wdev->registered)
 571                 return NOTIFY_DONE;
 572
 573         sdata = IEEE80211_DEV_TO_SUB_IF(ndev);
 574         vif_cfg = &sdata->vif.cfg;
 575
 576         /* ARP filtering is only supported in managed mode */
 577         if (sdata->vif.type != NL80211_IFTYPE_STATION)
 578                 return NOTIFY_DONE;
 579
 580         idev = __in_dev_get_rtnl(sdata->dev);
 581         if (!idev)
 582                 return NOTIFY_DONE;
 583
 584         ifmgd = &sdata->u.mgd;
 585
 586         /*
 587          * The nested here is needed to convince lockdep that this is
 588          * all OK. Yes, we lock the wiphy mutex here while we already
 589          * hold the notifier rwsem, that's the normal case. And yes,
 590          * we also acquire the notifier rwsem again when unregistering
 591          * a netdev while we already hold the wiphy mutex, so it does
 592          * look like a typical ABBA deadlock.
 593          *
 594          * However, both of these things happen with the RTNL held
 595          * already. Therefore, they can't actually happen, since the
 596          * lock orders really are ABC and ACB, which is fine due to
 597          * the RTNL (A).
 598          *
 599          * We still need to prevent recursion, which is accomplished
 600          * by the !wdev->registered check above.
 601          */
 602         mutex_lock_nested(&local->hw.wiphy->mtx, 1);
 603         __acquire(&local->hw.wiphy->mtx);
 604
 605         /* Copy the addresses to the vif config list */
 606         ifa = rtnl_dereference(idev->ifa_list);
 607         while (ifa) {
 608                 if (c < IEEE80211_BSS_ARP_ADDR_LIST_LEN)
 609                         vif_cfg->arp_addr_list[c] = ifa->ifa_address;
 610                 ifa = rtnl_dereference(ifa->ifa_next);
 611                 c++;
 612         }
 613
 614         vif_cfg->arp_addr_cnt = c;
 615
 616         /* Configure driver only if associated (which also implies it is up) */
 617         if (ifmgd->associated)
 618                 ieee80211_vif_cfg_change_notify(sdata, BSS_CHANGED_ARP_FILTER);
 619
 620         wiphy_unlock(local->hw.wiphy);
 621
 622         return NOTIFY_OK;
 623 }
 624 #endif
 625
 626 #if IS_ENABLED(CONFIG_IPV6)
 627 static int ieee80211_ifa6_changed(struct notifier_block *nb,
 628                                   unsigned long data, void *arg)
 629 {
 630         struct inet6_ifaddr *ifa = (struct inet6_ifaddr *)arg;
 631         struct inet6_dev *idev = ifa->idev;
 632         struct net_device *ndev = ifa->idev->dev;
 633         struct ieee80211_local *local =
 634                 container_of(nb, struct ieee80211_local, ifa6_notifier);
 635         struct wireless_dev *wdev = ndev->ieee80211_ptr;
 636         struct ieee80211_sub_if_data *sdata;
 637
 638         /* Make sure it's our interface that got changed */
 639         if (!wdev || wdev->wiphy != local->hw.wiphy)
 640                 return NOTIFY_DONE;
 641
 642         sdata = IEEE80211_DEV_TO_SUB_IF(ndev);
 643
 644         /*
 645          * For now only support station mode. This is mostly because
 646          * doing AP would have to handle AP_VLAN in some way ...
 647          */
 648         if (sdata->vif.type != NL80211_IFTYPE_STATION)
 649                 return NOTIFY_DONE;
 650
 651         drv_ipv6_addr_change(local, sdata, idev);
 652
 653         return NOTIFY_OK;
 654 }
 655 #endif
 656
 657 /* There isn't a lot of sense in it, but you can transmit anything you like */
 658 static const struct ieee80211_txrx_stypes
 659 ieee80211_default_mgmt_stypes[NUM_NL80211_IFTYPES] = {
 660         [NL80211_IFTYPE_ADHOC] = {
 661                 .tx = 0xffff,
 662                 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
 663                         BIT(IEEE80211_STYPE_AUTH >> 4) |
 664                         BIT(IEEE80211_STYPE_DEAUTH >> 4) |
 665                         BIT(IEEE80211_STYPE_PROBE_REQ >> 4),
 666         },
 667         [NL80211_IFTYPE_STATION] = {
 668                 .tx = 0xffff,
 669                 /*
 670                  * To support Pre Association Security Negotiation (PASN) while
 671                  * already associated to one AP, allow user space to register to
 672                  * Rx authentication frames, so that the user space logic would
 673                  * be able to receive/handle authentication frames from a
 674                  * different AP as part of PASN.
 675                  * It is expected that user space would intelligently register
 676                  * for Rx authentication frames, i.e., only when PASN is used
 677                  * and configure a match filter only for PASN authentication
 678                  * algorithm, as otherwise the MLME functionality of mac80211
 679                  * would be broken.
 680                  */
 681                 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
 682                         BIT(IEEE80211_STYPE_AUTH >> 4) |
 683                         BIT(IEEE80211_STYPE_PROBE_REQ >> 4),
 684         },
 685         [NL80211_IFTYPE_AP] = {
 686                 .tx = 0xffff,
 687                 .rx = BIT(IEEE80211_STYPE_ASSOC_REQ >> 4) |
 688                         BIT(IEEE80211_STYPE_REASSOC_REQ >> 4) |
 689                         BIT(IEEE80211_STYPE_PROBE_REQ >> 4) |
 690                         BIT(IEEE80211_STYPE_DISASSOC >> 4) |
 691                         BIT(IEEE80211_STYPE_AUTH >> 4) |
 692                         BIT(IEEE80211_STYPE_DEAUTH >> 4) |
 693                         BIT(IEEE80211_STYPE_ACTION >> 4),
 694         },
 695         [NL80211_IFTYPE_AP_VLAN] = {
 696                 /* copy AP */
 697                 .tx = 0xffff,
 698                 .rx = BIT(IEEE80211_STYPE_ASSOC_REQ >> 4) |
 699                         BIT(IEEE80211_STYPE_REASSOC_REQ >> 4) |
 700                         BIT(IEEE80211_STYPE_PROBE_REQ >> 4) |
 701                         BIT(IEEE80211_STYPE_DISASSOC >> 4) |
 702                         BIT(IEEE80211_STYPE_AUTH >> 4) |
 703                         BIT(IEEE80211_STYPE_DEAUTH >> 4) |
 704                         BIT(IEEE80211_STYPE_ACTION >> 4),
 705         },
 706         [NL80211_IFTYPE_P2P_CLIENT] = {
 707                 .tx = 0xffff,
 708                 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
 709                         BIT(IEEE80211_STYPE_PROBE_REQ >> 4),
 710         },
 711         [NL80211_IFTYPE_P2P_GO] = {
 712                 .tx = 0xffff,
 713                 .rx = BIT(IEEE80211_STYPE_ASSOC_REQ >> 4) |
 714                         BIT(IEEE80211_STYPE_REASSOC_REQ >> 4) |
 715                         BIT(IEEE80211_STYPE_PROBE_REQ >> 4) |
 716                         BIT(IEEE80211_STYPE_DISASSOC >> 4) |
 717                         BIT(IEEE80211_STYPE_AUTH >> 4) |
 718                         BIT(IEEE80211_STYPE_DEAUTH >> 4) |
 719                         BIT(IEEE80211_STYPE_ACTION >> 4),
 720         },
 721         [NL80211_IFTYPE_MESH_POINT] = {
 722                 .tx = 0xffff,
 723                 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
 724                         BIT(IEEE80211_STYPE_AUTH >> 4) |
 725                         BIT(IEEE80211_STYPE_DEAUTH >> 4),
 726         },
 727         [NL80211_IFTYPE_P2P_DEVICE] = {
 728                 .tx = 0xffff,
 729                 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
 730                         BIT(IEEE80211_STYPE_PROBE_REQ >> 4),
 731         },
 732 };
 733
 734 static const struct ieee80211_ht_cap mac80211_ht_capa_mod_mask = {
 735         .ampdu_params_info = IEEE80211_HT_AMPDU_PARM_FACTOR |
 736                              IEEE80211_HT_AMPDU_PARM_DENSITY,
 737
 738         .cap_info = cpu_to_le16(IEEE80211_HT_CAP_SUP_WIDTH_20_40 |
 739                                 IEEE80211_HT_CAP_MAX_AMSDU |
 740                                 IEEE80211_HT_CAP_SGI_20 |
 741                                 IEEE80211_HT_CAP_SGI_40 |
 742                                 IEEE80211_HT_CAP_TX_STBC |
 743                                 IEEE80211_HT_CAP_RX_STBC |
 744                                 IEEE80211_HT_CAP_LDPC_CODING |
 745                                 IEEE80211_HT_CAP_40MHZ_INTOLERANT),
 746         .mcs = {
 747                 .rx_mask = { 0xff, 0xff, 0xff, 0xff, 0xff,
 748                              0xff, 0xff, 0xff, 0xff, 0xff, },
 749         },
 750 };
 751
 752 static const struct ieee80211_vht_cap mac80211_vht_capa_mod_mask = {
 753         .vht_cap_info =
 754                 cpu_to_le32(IEEE80211_VHT_CAP_RXLDPC |
 755                             IEEE80211_VHT_CAP_SHORT_GI_80 |
 756                             IEEE80211_VHT_CAP_SHORT_GI_160 |
 757                             IEEE80211_VHT_CAP_RXSTBC_MASK |
 758                             IEEE80211_VHT_CAP_TXSTBC |
 759                             IEEE80211_VHT_CAP_SU_BEAMFORMER_CAPABLE |
 760                             IEEE80211_VHT_CAP_SU_BEAMFORMEE_CAPABLE |
 761                             IEEE80211_VHT_CAP_TX_ANTENNA_PATTERN |
 762                             IEEE80211_VHT_CAP_RX_ANTENNA_PATTERN |
 763                             IEEE80211_VHT_CAP_MAX_A_MPDU_LENGTH_EXPONENT_MASK),
 764         .supp_mcs = {
 765                 .rx_mcs_map = cpu_to_le16(~0),
 766                 .tx_mcs_map = cpu_to_le16(~0),
 767         },
 768 };
 769
 770 struct ieee80211_hw *ieee80211_alloc_hw_nm(size_t priv_data_len,
 771                                            const struct ieee80211_ops *ops,
 772                                            const char *requested_name)
 773 {
 774         struct ieee80211_local *local;
 775         int priv_size, i;
 776         struct wiphy *wiphy;
 777         bool emulate_chanctx;
 778
 779         if (WARN_ON(!ops->tx || !ops->start || !ops->stop || !ops->config ||
 780                     !ops->add_interface || !ops->remove_interface ||
 781                     !ops->configure_filter || !ops->wake_tx_queue))
 782                 return NULL;
 783
 784         if (WARN_ON(ops->sta_state && (ops->sta_add || ops->sta_remove)))
 785                 return NULL;
 786
 787         if (WARN_ON(!!ops->link_info_changed != !!ops->vif_cfg_changed ||
 788                     (ops->link_info_changed && ops->bss_info_changed)))
 789                 return NULL;
 790
 791         /* check all or no channel context operations exist */
 792         if (ops->add_chanctx == ieee80211_emulate_add_chanctx &&
 793             ops->remove_chanctx == ieee80211_emulate_remove_chanctx &&
 794             ops->change_chanctx == ieee80211_emulate_change_chanctx) {
 795                 if (WARN_ON(ops->assign_vif_chanctx ||
 796                             ops->unassign_vif_chanctx))
 797                         return NULL;
 798                 emulate_chanctx = true;
 799         } else {
 800                 if (WARN_ON(ops->add_chanctx == ieee80211_emulate_add_chanctx ||
 801                             ops->remove_chanctx == ieee80211_emulate_remove_chanctx ||
 802                             ops->change_chanctx == ieee80211_emulate_change_chanctx))
 803                         return NULL;
 804                 if (WARN_ON(!ops->add_chanctx ||
 805                             !ops->remove_chanctx ||
 806                             !ops->change_chanctx ||
 807                             !ops->assign_vif_chanctx ||
 808                             !ops->unassign_vif_chanctx))
 809                         return NULL;
 810                 emulate_chanctx = false;
 811         }
 812
 813         /* Ensure 32-byte alignment of our private data and hw private data.
 814          * We use the wiphy priv data for both our ieee80211_local and for
 815          * the driver's private data
 816          *
 817          * In memory it'll be like this:
 818          *
 819          * +-------------------------+
 820          * | struct wiphy           |
 821          * +-------------------------+
 822          * | struct ieee80211_local  |
 823          * +-------------------------+
 824          * | driver's private data   |
 825          * +-------------------------+
 826          *
 827          */
 828         priv_size = ALIGN(sizeof(*local), NETDEV_ALIGN) + priv_data_len;
 829
 830         wiphy = wiphy_new_nm(&mac80211_config_ops, priv_size, requested_name);
 831
 832         if (!wiphy)
 833                 return NULL;
 834
 835         wiphy->mgmt_stypes = ieee80211_default_mgmt_stypes;
 836
 837         wiphy->privid = mac80211_wiphy_privid;
 838
 839         wiphy->flags |= WIPHY_FLAG_NETNS_OK |
 840                         WIPHY_FLAG_4ADDR_AP |
 841                         WIPHY_FLAG_4ADDR_STATION |
 842                         WIPHY_FLAG_REPORTS_OBSS |
 843                         WIPHY_FLAG_OFFCHAN_TX;
 844
 845         if (emulate_chanctx || ops->remain_on_channel)
 846                 wiphy->flags |= WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL;
 847
 848         wiphy->features |= NL80211_FEATURE_SK_TX_STATUS |
 849                            NL80211_FEATURE_SAE |
 850                            NL80211_FEATURE_HT_IBSS |
 851                            NL80211_FEATURE_VIF_TXPOWER |
 852                            NL80211_FEATURE_MAC_ON_CREATE |
 853                            NL80211_FEATURE_USERSPACE_MPM |
 854                            NL80211_FEATURE_FULL_AP_CLIENT_STATE;
 855         wiphy_ext_feature_set(wiphy, NL80211_EXT_FEATURE_FILS_STA);
 856         wiphy_ext_feature_set(wiphy,
 857                               NL80211_EXT_FEATURE_CONTROL_PORT_OVER_NL80211);
 858         wiphy_ext_feature_set(wiphy,
 859                               NL80211_EXT_FEATURE_CONTROL_PORT_NO_PREAUTH);
 860         wiphy_ext_feature_set(wiphy,
 861                               NL80211_EXT_FEATURE_CONTROL_PORT_OVER_NL80211_TX_STATUS);
 862         wiphy_ext_feature_set(wiphy,
 863                               NL80211_EXT_FEATURE_SCAN_FREQ_KHZ);
 864         wiphy_ext_feature_set(wiphy,
 865                               NL80211_EXT_FEATURE_POWERED_ADDR_CHANGE);
 866
 867         if (!ops->hw_scan) {
 868                 wiphy->features |= NL80211_FEATURE_LOW_PRIORITY_SCAN |
 869                                    NL80211_FEATURE_AP_SCAN;
 870                 /*
 871                  * if the driver behaves correctly using the probe request
 872                  * (template) from mac80211, then both of these should be
 873                  * supported even with hw scan - but let drivers opt in.
 874                  */
 875                 wiphy_ext_feature_set(wiphy,
 876                                       NL80211_EXT_FEATURE_SCAN_RANDOM_SN);
 877                 wiphy_ext_feature_set(wiphy,
 878                                       NL80211_EXT_FEATURE_SCAN_MIN_PREQ_CONTENT);
 879         }
 880
 881         if (!ops->set_key) {
 882                 wiphy->flags |= WIPHY_FLAG_IBSS_RSN;
 883                 wiphy_ext_feature_set(wiphy,
 884                                       NL80211_EXT_FEATURE_SPP_AMSDU_SUPPORT);
 885         }
 886
 887         wiphy_ext_feature_set(wiphy, NL80211_EXT_FEATURE_TXQS);
 888         wiphy_ext_feature_set(wiphy, NL80211_EXT_FEATURE_RRM);
 889
 890         wiphy->bss_priv_size = sizeof(struct ieee80211_bss);
 891
 892         local = wiphy_priv(wiphy);
 893
 894         if (sta_info_init(local))
 895                 goto err_free;
 896
 897         local->hw.wiphy = wiphy;
 898
 899         local->hw.priv = (char *)local + ALIGN(sizeof(*local), NETDEV_ALIGN);
 900
 901         local->ops = ops;
 902         local->emulate_chanctx = emulate_chanctx;
 903
 904         if (emulate_chanctx)
 905                 ieee80211_hw_set(&local->hw, CHANCTX_STA_CSA);
 906
 907         /*
 908          * We need a bit of data queued to build aggregates properly, so
 909          * instruct the TCP stack to allow more than a single ms of data
 910          * to be queued in the stack. The value is a bit-shift of 1
 911          * second, so 7 is ~8ms of queued data. Only affects local TCP
 912          * sockets.
 913          * This is the default, anyhow - drivers may need to override it
 914          * for local reasons (longer buffers, longer completion time, or
 915          * similar).
 916          */
 917         local->hw.tx_sk_pacing_shift = 7;
 918
 919         /* set up some defaults */
 920         local->hw.queues = 1;
 921         local->hw.max_rates = 1;
 922         local->hw.max_report_rates = 0;
 923         local->hw.max_rx_aggregation_subframes = IEEE80211_MAX_AMPDU_BUF_HT;
 924         local->hw.max_tx_aggregation_subframes = IEEE80211_MAX_AMPDU_BUF_HT;
 925         local->hw.offchannel_tx_hw_queue = IEEE80211_INVAL_HW_QUEUE;
 926         local->hw.conf.long_frame_max_tx_count = wiphy->retry_long;
 927         local->hw.conf.short_frame_max_tx_count = wiphy->retry_short;
 928         local->hw.radiotap_mcs_details = IEEE80211_RADIOTAP_MCS_HAVE_MCS |
 929                                          IEEE80211_RADIOTAP_MCS_HAVE_GI |
 930                                          IEEE80211_RADIOTAP_MCS_HAVE_BW;
 931         local->hw.radiotap_vht_details = IEEE80211_RADIOTAP_VHT_KNOWN_GI |
 932                                          IEEE80211_RADIOTAP_VHT_KNOWN_BANDWIDTH;
 933         local->hw.uapsd_queues = IEEE80211_DEFAULT_UAPSD_QUEUES;
 934         local->hw.uapsd_max_sp_len = IEEE80211_DEFAULT_MAX_SP_LEN;
 935         local->hw.max_mtu = IEEE80211_MAX_DATA_LEN;
 936         local->user_power_level = IEEE80211_UNSET_POWER_LEVEL;
 937         wiphy->ht_capa_mod_mask = &mac80211_ht_capa_mod_mask;
 938         wiphy->vht_capa_mod_mask = &mac80211_vht_capa_mod_mask;
 939
 940         local->ext_capa[7] = WLAN_EXT_CAPA8_OPMODE_NOTIF;
 941
 942         wiphy->extended_capabilities = local->ext_capa;
 943         wiphy->extended_capabilities_mask = local->ext_capa;
 944         wiphy->extended_capabilities_len =
 945                 ARRAY_SIZE(local->ext_capa);
 946
 947         INIT_LIST_HEAD(&local->interfaces);
 948         INIT_LIST_HEAD(&local->mon_list);
 949
 950         __hw_addr_init(&local->mc_list);
 951
 952         mutex_init(&local->iflist_mtx);
 953         spin_lock_init(&local->filter_lock);
 954         spin_lock_init(&local->rx_path_lock);
 955         spin_lock_init(&local->queue_stop_reason_lock);
 956
 957         for (i = 0; i < IEEE80211_NUM_ACS; i++) {
 958                 INIT_LIST_HEAD(&local->active_txqs[i]);
 959                 spin_lock_init(&local->active_txq_lock[i]);
 960                 local->aql_txq_limit_low[i] = IEEE80211_DEFAULT_AQL_TXQ_LIMIT_L;
 961                 local->aql_txq_limit_high[i] =
 962                         IEEE80211_DEFAULT_AQL_TXQ_LIMIT_H;
 963                 atomic_set(&local->aql_ac_pending_airtime[i], 0);
 964         }
 965
 966         local->airtime_flags = AIRTIME_USE_TX | AIRTIME_USE_RX;
 967         local->aql_threshold = IEEE80211_AQL_THRESHOLD;
 968         atomic_set(&local->aql_total_pending_airtime, 0);
 969
 970         spin_lock_init(&local->handle_wake_tx_queue_lock);
 971
 972         INIT_LIST_HEAD(&local->chanctx_list);
 973
 974         wiphy_delayed_work_init(&local->scan_work, ieee80211_scan_work);
 975
 976         INIT_WORK(&local->restart_work, ieee80211_restart_work);
 977
 978         wiphy_work_init(&local->radar_detected_work,
 979                         ieee80211_dfs_radar_detected_work);
 980
 981         wiphy_work_init(&local->reconfig_filter, ieee80211_reconfig_filter);
 982
 983         wiphy_work_init(&local->dynamic_ps_enable_work,
 984                         ieee80211_dynamic_ps_enable_work);
 985         wiphy_work_init(&local->dynamic_ps_disable_work,
 986                         ieee80211_dynamic_ps_disable_work);
 987         timer_setup(&local->dynamic_ps_timer, ieee80211_dynamic_ps_timer, 0);
 988
 989         wiphy_work_init(&local->sched_scan_stopped_work,
 990                         ieee80211_sched_scan_stopped_work);
 991
 992         spin_lock_init(&local->ack_status_lock);
 993         idr_init(&local->ack_status_frames);
 994
 995         for (i = 0; i < IEEE80211_MAX_QUEUES; i++) {
 996                 skb_queue_head_init(&local->pending[i]);
 997                 atomic_set(&local->agg_queue_stop[i], 0);
 998         }
 999         tasklet_setup(&local->tx_pending_tasklet, ieee80211_tx_pending);
1000         tasklet_setup(&local->wake_txqs_tasklet, ieee80211_wake_txqs);
1001         tasklet_setup(&local->tasklet, ieee80211_tasklet_handler);
1002
1003         skb_queue_head_init(&local->skb_queue);
1004         skb_queue_head_init(&local->skb_queue_unreliable);
1005
1006         ieee80211_alloc_led_names(local);
1007
1008         ieee80211_roc_setup(local);
1009
1010         local->hw.radiotap_timestamp.units_pos = -1;
1011         local->hw.radiotap_timestamp.accuracy = -1;
1012
1013         return &local->hw;
1014  err_free:
1015         wiphy_free(wiphy);
1016         return NULL;
1017 }
1018 EXPORT_SYMBOL(ieee80211_alloc_hw_nm);
1019
1020 static int ieee80211_init_cipher_suites(struct ieee80211_local *local)
1021 {
1022         bool have_wep = !fips_enabled; /* FIPS does not permit the use of RC4 */
1023         bool have_mfp = ieee80211_hw_check(&local->hw, MFP_CAPABLE);
1024         int r = 0, w = 0;
1025         u32 *suites;
1026         static const u32 cipher_suites[] = {
1027                 /* keep WEP first, it may be removed below */
1028                 WLAN_CIPHER_SUITE_WEP40,
1029                 WLAN_CIPHER_SUITE_WEP104,
1030                 WLAN_CIPHER_SUITE_TKIP,
1031                 WLAN_CIPHER_SUITE_CCMP,
1032                 WLAN_CIPHER_SUITE_CCMP_256,
1033                 WLAN_CIPHER_SUITE_GCMP,
1034                 WLAN_CIPHER_SUITE_GCMP_256,
1035
1036                 /* keep last -- depends on hw flags! */
1037                 WLAN_CIPHER_SUITE_AES_CMAC,
1038                 WLAN_CIPHER_SUITE_BIP_CMAC_256,
1039                 WLAN_CIPHER_SUITE_BIP_GMAC_128,
1040                 WLAN_CIPHER_SUITE_BIP_GMAC_256,
1041         };
1042
1043         if (ieee80211_hw_check(&local->hw, SW_CRYPTO_CONTROL) ||
1044             local->hw.wiphy->cipher_suites) {
1045                 /* If the driver advertises, or doesn't support SW crypto,
1046                  * we only need to remove WEP if necessary.
1047                  */
1048                 if (have_wep)
1049                         return 0;
1050
1051                 /* well if it has _no_ ciphers ... fine */
1052                 if (!local->hw.wiphy->n_cipher_suites)
1053                         return 0;
1054
1055                 /* Driver provides cipher suites, but we need to exclude WEP */
1056                 suites = kmemdup_array(local->hw.wiphy->cipher_suites,
1057                                        local->hw.wiphy->n_cipher_suites,
1058                                        sizeof(u32), GFP_KERNEL);
1059                 if (!suites)
1060                         return -ENOMEM;
1061
1062                 for (r = 0; r < local->hw.wiphy->n_cipher_suites; r++) {
1063                         u32 suite = local->hw.wiphy->cipher_suites[r];
1064
1065                         if (suite == WLAN_CIPHER_SUITE_WEP40 ||
1066                             suite == WLAN_CIPHER_SUITE_WEP104)
1067                                 continue;
1068                         suites[w++] = suite;
1069                 }
1070         } else {
1071                 /* assign the (software supported and perhaps offloaded)
1072                  * cipher suites
1073                  */
1074                 local->hw.wiphy->cipher_suites = cipher_suites;
1075                 local->hw.wiphy->n_cipher_suites = ARRAY_SIZE(cipher_suites);
1076
1077                 if (!have_mfp)
1078                         local->hw.wiphy->n_cipher_suites -= 4;
1079
1080                 if (!have_wep) {
1081                         local->hw.wiphy->cipher_suites += 2;
1082                         local->hw.wiphy->n_cipher_suites -= 2;
1083                 }
1084
1085                 /* not dynamically allocated, so just return */
1086                 return 0;
1087         }
1088
1089         local->hw.wiphy->cipher_suites = suites;
1090         local->hw.wiphy->n_cipher_suites = w;
1091         local->wiphy_ciphers_allocated = true;
1092
1093         return 0;
1094 }
1095
1096 static bool
1097 ieee80211_ifcomb_check(const struct ieee80211_iface_combination *c, int n_comb)
1098 {
1099         int i, j;
1100
1101         for (i = 0; i < n_comb; i++, c++) {
1102                 /* DFS is not supported with multi-channel combinations yet */
1103                 if (c->radar_detect_widths &&
1104                     c->num_different_channels > 1)
1105                         return false;
1106
1107                 /* mac80211 doesn't support more than one IBSS interface */
1108                 for (j = 0; j < c->n_limits; j++)
1109                         if ((c->limits[j].types & BIT(NL80211_IFTYPE_ADHOC)) &&
1110                             c->limits[j].max > 1)
1111                                 return false;
1112         }
1113
1114         return true;
1115 }
1116
1117 int ieee80211_register_hw(struct ieee80211_hw *hw)
1118 {
1119         struct ieee80211_local *local = hw_to_local(hw);
1120         int result, i;
1121         enum nl80211_band band;
1122         int channels, max_bitrates;
1123         bool supp_ht, supp_vht, supp_he, supp_eht;
1124         struct cfg80211_chan_def dflt_chandef = {};
1125
1126         if (ieee80211_hw_check(hw, QUEUE_CONTROL) &&
1127             (local->hw.offchannel_tx_hw_queue == IEEE80211_INVAL_HW_QUEUE ||
1128              local->hw.offchannel_tx_hw_queue >= local->hw.queues))
1129                 return -EINVAL;
1130
1131         if ((hw->wiphy->features & NL80211_FEATURE_TDLS_CHANNEL_SWITCH) &&
1132             (!local->ops->tdls_channel_switch ||
1133              !local->ops->tdls_cancel_channel_switch ||
1134              !local->ops->tdls_recv_channel_switch))
1135                 return -EOPNOTSUPP;
1136
1137         if (WARN_ON(ieee80211_hw_check(hw, SUPPORTS_TX_FRAG) &&
1138                     !local->ops->set_frag_threshold))
1139                 return -EINVAL;
1140
1141         if (WARN_ON(local->hw.wiphy->interface_modes &
1142                         BIT(NL80211_IFTYPE_NAN) &&
1143                     (!local->ops->start_nan || !local->ops->stop_nan)))
1144                 return -EINVAL;
1145
1146         if (hw->wiphy->flags & WIPHY_FLAG_SUPPORTS_MLO) {
1147                 /*
1148                  * For drivers capable of doing MLO, assume modern driver
1149                  * or firmware facilities, so software doesn't have to do
1150                  * as much, e.g. monitoring beacons would be hard if we
1151                  * might not even know which link is active at which time.
1152                  */
1153                 if (WARN_ON(local->emulate_chanctx))
1154                         return -EINVAL;
1155
1156                 if (WARN_ON(!local->ops->link_info_changed))
1157                         return -EINVAL;
1158
1159                 if (WARN_ON(!ieee80211_hw_check(hw, HAS_RATE_CONTROL)))
1160                         return -EINVAL;
1161
1162                 if (WARN_ON(!ieee80211_hw_check(hw, AMPDU_AGGREGATION)))
1163                         return -EINVAL;
1164
1165                 if (WARN_ON(ieee80211_hw_check(hw, HOST_BROADCAST_PS_BUFFERING)))
1166                         return -EINVAL;
1167
1168                 if (WARN_ON(ieee80211_hw_check(hw, SUPPORTS_PS) &&
1169                             (!ieee80211_hw_check(hw, SUPPORTS_DYNAMIC_PS) ||
1170                              ieee80211_hw_check(hw, PS_NULLFUNC_STACK))))
1171                         return -EINVAL;
1172
1173                 if (WARN_ON(!ieee80211_hw_check(hw, MFP_CAPABLE)))
1174                         return -EINVAL;
1175
1176                 if (WARN_ON(!ieee80211_hw_check(hw, CONNECTION_MONITOR)))
1177                         return -EINVAL;
1178
1179                 if (WARN_ON(ieee80211_hw_check(hw, NEED_DTIM_BEFORE_ASSOC)))
1180                         return -EINVAL;
1181
1182                 if (WARN_ON(ieee80211_hw_check(hw, TIMING_BEACON_ONLY)))
1183                         return -EINVAL;
1184
1185                 if (WARN_ON(!ieee80211_hw_check(hw, AP_LINK_PS)))
1186                         return -EINVAL;
1187         }
1188
1189 #ifdef CONFIG_PM
1190         if (hw->wiphy->wowlan && (!local->ops->suspend || !local->ops->resume))
1191                 return -EINVAL;
1192 #endif
1193
1194         if (local->emulate_chanctx) {
1195                 for (i = 0; i < local->hw.wiphy->n_iface_combinations; i++) {
1196                         const struct ieee80211_iface_combination *comb;
1197
1198                         comb = &local->hw.wiphy->iface_combinations[i];
1199
1200                         if (comb->num_different_channels > 1)
1201                                 return -EINVAL;
1202                 }
1203         }
1204
1205         if (hw->wiphy->n_radio) {
1206                 for (i = 0; i < hw->wiphy->n_radio; i++) {
1207                         const struct wiphy_radio *radio = &hw->wiphy->radio[i];
1208
1209                         if (!ieee80211_ifcomb_check(radio->iface_combinations,
1210                                                     radio->n_iface_combinations))
1211                                 return -EINVAL;
1212                 }
1213         } else {
1214                 if (!ieee80211_ifcomb_check(hw->wiphy->iface_combinations,
1215                                             hw->wiphy->n_iface_combinations))
1216                         return -EINVAL;
1217         }
1218
1219         /* Only HW csum features are currently compatible with mac80211 */
1220         if (WARN_ON(hw->netdev_features & ~MAC80211_SUPPORTED_FEATURES))
1221                 return -EINVAL;
1222
1223         if (hw->max_report_rates == 0)
1224                 hw->max_report_rates = hw->max_rates;
1225
1226         local->rx_chains = 1;
1227
1228         /*
1229          * generic code guarantees at least one band,
1230          * set this very early because much code assumes
1231          * that hw.conf.channel is assigned
1232          */
1233         channels = 0;
1234         max_bitrates = 0;
1235         supp_ht = false;
1236         supp_vht = false;
1237         supp_he = false;
1238         supp_eht = false;
1239         for (band = 0; band < NUM_NL80211_BANDS; band++) {
1240                 const struct ieee80211_sband_iftype_data *iftd;
1241                 struct ieee80211_supported_band *sband;
1242
1243                 sband = local->hw.wiphy->bands[band];
1244                 if (!sband)
1245                         continue;
1246
1247                 if (!dflt_chandef.chan) {
1248                         /*
1249                          * Assign the first enabled channel to dflt_chandef
1250                          * from the list of channels
1251                          */
1252                         for (i = 0; i < sband->n_channels; i++)
1253                                 if (!(sband->channels[i].flags &
1254                                                 IEEE80211_CHAN_DISABLED))
1255                                         break;
1256                         /* if none found then use the first anyway */
1257                         if (i == sband->n_channels)
1258                                 i = 0;
1259                         cfg80211_chandef_create(&dflt_chandef,
1260                                                 &sband->channels[i],
1261                                                 NL80211_CHAN_NO_HT);
1262                         /* init channel we're on */
1263                         local->monitor_chanreq.oper = dflt_chandef;
1264                         if (local->emulate_chanctx) {
1265                                 local->dflt_chandef = dflt_chandef;
1266                                 local->hw.conf.chandef = dflt_chandef;
1267                         }
1268                 }
1269
1270                 channels += sband->n_channels;
1271
1272                 /*
1273                  * Due to the way the aggregation code handles this and it
1274                  * being an HT capability, we can't really support delayed
1275                  * BA in MLO (yet).
1276                  */
1277                 if (WARN_ON(sband->ht_cap.ht_supported &&
1278                             (sband->ht_cap.cap & IEEE80211_HT_CAP_DELAY_BA) &&
1279                             hw->wiphy->flags & WIPHY_FLAG_SUPPORTS_MLO))
1280                         return -EINVAL;
1281
1282                 if (max_bitrates < sband->n_bitrates)
1283                         max_bitrates = sband->n_bitrates;
1284                 supp_ht = supp_ht || sband->ht_cap.ht_supported;
1285                 supp_vht = supp_vht || sband->vht_cap.vht_supported;
1286
1287                 for_each_sband_iftype_data(sband, i, iftd) {
1288                         u8 he_40_mhz_cap;
1289
1290                         supp_he = supp_he || iftd->he_cap.has_he;
1291                         supp_eht = supp_eht || iftd->eht_cap.has_eht;
1292
1293                         if (band == NL80211_BAND_2GHZ)
1294                                 he_40_mhz_cap =
1295                                         IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_40MHZ_IN_2G;
1296                         else
1297                                 he_40_mhz_cap =
1298                                         IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_40MHZ_80MHZ_IN_5G;
1299
1300                         /* currently no support for HE client where HT has 40 MHz but not HT */
1301                         if (iftd->he_cap.has_he &&
1302                             iftd->types_mask & (BIT(NL80211_IFTYPE_STATION) |
1303                                                 BIT(NL80211_IFTYPE_P2P_CLIENT)) &&
1304                             sband->ht_cap.ht_supported &&
1305                             sband->ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40 &&
1306                             !(iftd->he_cap.he_cap_elem.phy_cap_info[0] & he_40_mhz_cap))
1307                                 return -EINVAL;
1308                 }
1309
1310                 /* HT, VHT, HE require QoS, thus >= 4 queues */
1311                 if (WARN_ON(local->hw.queues < IEEE80211_NUM_ACS &&
1312                             (supp_ht || supp_vht || supp_he)))
1313                         return -EINVAL;
1314
1315                 /* EHT requires HE support */
1316                 if (WARN_ON(supp_eht && !supp_he))
1317                         return -EINVAL;
1318
1319                 if (!sband->ht_cap.ht_supported)
1320                         continue;
1321
1322                 /* TODO: consider VHT for RX chains, hopefully it's the same */
1323                 local->rx_chains =
1324                         max(ieee80211_mcs_to_chains(&sband->ht_cap.mcs),
1325                             local->rx_chains);
1326
1327                 /* no need to mask, SM_PS_DISABLED has all bits set */
1328                 sband->ht_cap.cap |= WLAN_HT_CAP_SM_PS_DISABLED <<
1329                                      IEEE80211_HT_CAP_SM_PS_SHIFT;
1330         }
1331
1332         /* if low-level driver supports AP, we also support VLAN.
1333          * drivers advertising SW_CRYPTO_CONTROL should enable AP_VLAN
1334          * based on their support to transmit SW encrypted packets.
1335          */
1336         if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_AP) &&
1337             !ieee80211_hw_check(&local->hw, SW_CRYPTO_CONTROL)) {
1338                 hw->wiphy->interface_modes |= BIT(NL80211_IFTYPE_AP_VLAN);
1339                 hw->wiphy->software_iftypes |= BIT(NL80211_IFTYPE_AP_VLAN);
1340         }
1341
1342         /* mac80211 always supports monitor */
1343         hw->wiphy->interface_modes |= BIT(NL80211_IFTYPE_MONITOR);
1344         hw->wiphy->software_iftypes |= BIT(NL80211_IFTYPE_MONITOR);
1345
1346
1347         local->int_scan_req = kzalloc(sizeof(*local->int_scan_req) +
1348                                       sizeof(void *) * channels, GFP_KERNEL);
1349         if (!local->int_scan_req)
1350                 return -ENOMEM;
1351
1352         eth_broadcast_addr(local->int_scan_req->bssid);
1353
1354         for (band = 0; band < NUM_NL80211_BANDS; band++) {
1355                 if (!local->hw.wiphy->bands[band])
1356                         continue;
1357                 local->int_scan_req->rates[band] = (u32) -1;
1358         }
1359
1360 #ifndef CONFIG_MAC80211_MESH
1361         /* mesh depends on Kconfig, but drivers should set it if they want */
1362         local->hw.wiphy->interface_modes &= ~BIT(NL80211_IFTYPE_MESH_POINT);
1363 #endif
1364
1365         /* if the underlying driver supports mesh, mac80211 will (at least)
1366          * provide routing of mesh authentication frames to userspace */
1367         if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_MESH_POINT))
1368                 local->hw.wiphy->flags |= WIPHY_FLAG_MESH_AUTH;
1369
1370         /* mac80211 supports control port protocol changing */
1371         local->hw.wiphy->flags |= WIPHY_FLAG_CONTROL_PORT_PROTOCOL;
1372
1373         if (ieee80211_hw_check(&local->hw, SIGNAL_DBM)) {
1374                 local->hw.wiphy->signal_type = CFG80211_SIGNAL_TYPE_MBM;
1375         } else if (ieee80211_hw_check(&local->hw, SIGNAL_UNSPEC)) {
1376                 local->hw.wiphy->signal_type = CFG80211_SIGNAL_TYPE_UNSPEC;
1377                 if (hw->max_signal <= 0) {
1378                         result = -EINVAL;
1379                         goto fail_workqueue;
1380                 }
1381         }
1382
1383         /* Mac80211 and therefore all drivers using SW crypto only
1384          * are able to handle PTK rekeys and Extended Key ID.
1385          */
1386         if (!local->ops->set_key) {
1387                 wiphy_ext_feature_set(local->hw.wiphy,
1388                                       NL80211_EXT_FEATURE_CAN_REPLACE_PTK0);
1389                 wiphy_ext_feature_set(local->hw.wiphy,
1390                                       NL80211_EXT_FEATURE_EXT_KEY_ID);
1391         }
1392
1393         if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_ADHOC))
1394                 wiphy_ext_feature_set(local->hw.wiphy,
1395                                       NL80211_EXT_FEATURE_DEL_IBSS_STA);
1396
1397         /*
1398          * Calculate scan IE length -- we need this to alloc
1399          * memory and to subtract from the driver limit. It
1400          * includes the DS Params, (extended) supported rates, and HT
1401          * information -- SSID is the driver's responsibility.
1402          */
1403         local->scan_ies_len = 4 + max_bitrates /* (ext) supp rates */ +
1404                 3 /* DS Params */;
1405         if (supp_ht)
1406                 local->scan_ies_len += 2 + sizeof(struct ieee80211_ht_cap);
1407
1408         if (supp_vht)
1409                 local->scan_ies_len +=
1410                         2 + sizeof(struct ieee80211_vht_cap);
1411
1412         /*
1413          * HE cap element is variable in size - set len to allow max size */
1414         if (supp_he) {
1415                 local->scan_ies_len +=
1416                         3 + sizeof(struct ieee80211_he_cap_elem) +
1417                         sizeof(struct ieee80211_he_mcs_nss_supp) +
1418                         IEEE80211_HE_PPE_THRES_MAX_LEN;
1419
1420                 if (supp_eht)
1421                         local->scan_ies_len +=
1422                                 3 + sizeof(struct ieee80211_eht_cap_elem) +
1423                                 sizeof(struct ieee80211_eht_mcs_nss_supp) +
1424                                 IEEE80211_EHT_PPE_THRES_MAX_LEN;
1425         }
1426
1427         if (!local->ops->hw_scan) {
1428                 /* For hw_scan, driver needs to set these up. */
1429                 local->hw.wiphy->max_scan_ssids = 4;
1430                 local->hw.wiphy->max_scan_ie_len = IEEE80211_MAX_DATA_LEN;
1431         }
1432
1433         /*
1434          * If the driver supports any scan IEs, then assume the
1435          * limit includes the IEs mac80211 will add, otherwise
1436          * leave it at zero and let the driver sort it out; we
1437          * still pass our IEs to the driver but userspace will
1438          * not be allowed to in that case.
1439          */
1440         if (local->hw.wiphy->max_scan_ie_len)
1441                 local->hw.wiphy->max_scan_ie_len -= local->scan_ies_len;
1442
1443         result = ieee80211_init_cipher_suites(local);
1444         if (result < 0)
1445                 goto fail_workqueue;
1446
1447         if (!local->ops->remain_on_channel)
1448                 local->hw.wiphy->max_remain_on_channel_duration = 5000;
1449
1450         /* mac80211 based drivers don't support internal TDLS setup */
1451         if (local->hw.wiphy->flags & WIPHY_FLAG_SUPPORTS_TDLS)
1452                 local->hw.wiphy->flags |= WIPHY_FLAG_TDLS_EXTERNAL_SETUP;
1453
1454         /* mac80211 supports eCSA, if the driver supports STA CSA at all */
1455         if (ieee80211_hw_check(&local->hw, CHANCTX_STA_CSA))
1456                 local->ext_capa[0] |= WLAN_EXT_CAPA1_EXT_CHANNEL_SWITCHING;
1457
1458         /* mac80211 supports multi BSSID, if the driver supports it */
1459         if (ieee80211_hw_check(&local->hw, SUPPORTS_MULTI_BSSID)) {
1460                 local->hw.wiphy->support_mbssid = true;
1461                 if (ieee80211_hw_check(&local->hw,
1462                                        SUPPORTS_ONLY_HE_MULTI_BSSID))
1463                         local->hw.wiphy->support_only_he_mbssid = true;
1464                 else
1465                         local->ext_capa[2] |=
1466                                 WLAN_EXT_CAPA3_MULTI_BSSID_SUPPORT;
1467         }
1468
1469         local->hw.wiphy->max_num_csa_counters = IEEE80211_MAX_CNTDWN_COUNTERS_NUM;
1470
1471         /*
1472          * We use the number of queues for feature tests (QoS, HT) internally
1473          * so restrict them appropriately.
1474          */
1475         if (hw->queues > IEEE80211_MAX_QUEUES)
1476                 hw->queues = IEEE80211_MAX_QUEUES;
1477
1478         local->workqueue =
1479                 alloc_ordered_workqueue("%s", 0, wiphy_name(local->hw.wiphy));
1480         if (!local->workqueue) {
1481                 result = -ENOMEM;
1482                 goto fail_workqueue;
1483         }
1484
1485         /*
1486          * The hardware needs headroom for sending the frame,
1487          * and we need some headroom for passing the frame to monitor
1488          * interfaces, but never both at the same time.
1489          */
1490         local->tx_headroom = max_t(unsigned int , local->hw.extra_tx_headroom,
1491                                    IEEE80211_TX_STATUS_HEADROOM);
1492
1493         /*
1494          * if the driver doesn't specify a max listen interval we
1495          * use 5 which should be a safe default
1496          */
1497         if (local->hw.max_listen_interval == 0)
1498                 local->hw.max_listen_interval = 5;
1499
1500         local->hw.conf.listen_interval = local->hw.max_listen_interval;
1501
1502         local->dynamic_ps_forced_timeout = -1;
1503
1504         if (!local->hw.max_nan_de_entries)
1505                 local->hw.max_nan_de_entries = IEEE80211_MAX_NAN_INSTANCE_ID;
1506
1507         if (!local->hw.weight_multiplier)
1508                 local->hw.weight_multiplier = 1;
1509
1510         ieee80211_wep_init(local);
1511
1512         local->hw.conf.flags = IEEE80211_CONF_IDLE;
1513
1514         ieee80211_led_init(local);
1515
1516         result = ieee80211_txq_setup_flows(local);
1517         if (result)
1518                 goto fail_flows;
1519
1520         rtnl_lock();
1521         result = ieee80211_init_rate_ctrl_alg(local,
1522                                               hw->rate_control_algorithm);
1523         rtnl_unlock();
1524         if (result < 0) {
1525                 wiphy_debug(local->hw.wiphy,
1526                             "Failed to initialize rate control algorithm\n");
1527                 goto fail_rate;
1528         }
1529
1530         if (local->rate_ctrl) {
1531                 clear_bit(IEEE80211_HW_SUPPORTS_VHT_EXT_NSS_BW, hw->flags);
1532                 if (local->rate_ctrl->ops->capa & RATE_CTRL_CAPA_VHT_EXT_NSS_BW)
1533                         ieee80211_hw_set(hw, SUPPORTS_VHT_EXT_NSS_BW);
1534         }
1535
1536         /*
1537          * If the VHT capabilities don't have IEEE80211_VHT_EXT_NSS_BW_CAPABLE,
1538          * or have it when we don't, copy the sband structure and set/clear it.
1539          * This is necessary because rate scaling algorithms could be switched
1540          * and have different support values.
1541          * Print a message so that in the common case the reallocation can be
1542          * avoided.
1543          */
1544         BUILD_BUG_ON(NUM_NL80211_BANDS > 8 * sizeof(local->sband_allocated));
1545         for (band = 0; band < NUM_NL80211_BANDS; band++) {
1546                 struct ieee80211_supported_band *sband;
1547                 bool local_cap, ie_cap;
1548
1549                 local_cap = ieee80211_hw_check(hw, SUPPORTS_VHT_EXT_NSS_BW);
1550
1551                 sband = local->hw.wiphy->bands[band];
1552                 if (!sband || !sband->vht_cap.vht_supported)
1553                         continue;
1554
1555                 ie_cap = !!(sband->vht_cap.vht_mcs.tx_highest &
1556                             cpu_to_le16(IEEE80211_VHT_EXT_NSS_BW_CAPABLE));
1557
1558                 if (local_cap == ie_cap)
1559                         continue;
1560
1561                 sband = kmemdup(sband, sizeof(*sband), GFP_KERNEL);
1562                 if (!sband) {
1563                         result = -ENOMEM;
1564                         goto fail_rate;
1565                 }
1566
1567                 wiphy_dbg(hw->wiphy, "copying sband (band %d) due to VHT EXT NSS BW flag\n",
1568                           band);
1569
1570                 sband->vht_cap.vht_mcs.tx_highest ^=
1571                         cpu_to_le16(IEEE80211_VHT_EXT_NSS_BW_CAPABLE);
1572
1573                 local->hw.wiphy->bands[band] = sband;
1574                 local->sband_allocated |= BIT(band);
1575         }
1576
1577         result = wiphy_register(local->hw.wiphy);
1578         if (result < 0)
1579                 goto fail_wiphy_register;
1580
1581         debugfs_hw_add(local);
1582         rate_control_add_debugfs(local);
1583
1584         ieee80211_check_wbrf_support(local);
1585
1586         rtnl_lock();
1587         wiphy_lock(hw->wiphy);
1588
1589         /* add one default STA interface if supported */
1590         if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_STATION) &&
1591             !ieee80211_hw_check(hw, NO_AUTO_VIF)) {
1592                 struct vif_params params = {0};
1593
1594                 result = ieee80211_if_add(local, "wlan%d", NET_NAME_ENUM, NULL,
1595                                           NL80211_IFTYPE_STATION, &params);
1596                 if (result)
1597                         wiphy_warn(local->hw.wiphy,
1598                                    "Failed to add default virtual iface\n");
1599         }
1600
1601         wiphy_unlock(hw->wiphy);
1602         rtnl_unlock();
1603
1604 #ifdef CONFIG_INET
1605         local->ifa_notifier.notifier_call = ieee80211_ifa_changed;
1606         result = register_inetaddr_notifier(&local->ifa_notifier);
1607         if (result)
1608                 goto fail_ifa;
1609 #endif
1610
1611 #if IS_ENABLED(CONFIG_IPV6)
1612         local->ifa6_notifier.notifier_call = ieee80211_ifa6_changed;
1613         result = register_inet6addr_notifier(&local->ifa6_notifier);
1614         if (result)
1615                 goto fail_ifa6;
1616 #endif
1617
1618         return 0;
1619
1620 #if IS_ENABLED(CONFIG_IPV6)
1621  fail_ifa6:
1622 #ifdef CONFIG_INET
1623         unregister_inetaddr_notifier(&local->ifa_notifier);
1624 #endif
1625 #endif
1626 #if defined(CONFIG_INET) || defined(CONFIG_IPV6)
1627  fail_ifa:
1628 #endif
1629         wiphy_unregister(local->hw.wiphy);
1630  fail_wiphy_register:
1631         rtnl_lock();
1632         rate_control_deinitialize(local);
1633         ieee80211_remove_interfaces(local);
1634         rtnl_unlock();
1635  fail_rate:
1636         ieee80211_txq_teardown_flows(local);
1637  fail_flows:
1638         ieee80211_led_exit(local);
1639         destroy_workqueue(local->workqueue);
1640  fail_workqueue:
1641         if (local->wiphy_ciphers_allocated) {
1642                 kfree(local->hw.wiphy->cipher_suites);
1643                 local->wiphy_ciphers_allocated = false;
1644         }
1645         kfree(local->int_scan_req);
1646         return result;
1647 }
1648 EXPORT_SYMBOL(ieee80211_register_hw);
1649
1650 void ieee80211_unregister_hw(struct ieee80211_hw *hw)
1651 {
1652         struct ieee80211_local *local = hw_to_local(hw);
1653
1654         tasklet_kill(&local->tx_pending_tasklet);
1655         tasklet_kill(&local->tasklet);
1656
1657 #ifdef CONFIG_INET
1658         unregister_inetaddr_notifier(&local->ifa_notifier);
1659 #endif
1660 #if IS_ENABLED(CONFIG_IPV6)
1661         unregister_inet6addr_notifier(&local->ifa6_notifier);
1662 #endif
1663
1664         rtnl_lock();
1665
1666         /*
1667          * At this point, interface list manipulations are fine
1668          * because the driver cannot be handing us frames any
1669          * more and the tasklet is killed.
1670          */
1671         ieee80211_remove_interfaces(local);
1672
1673         ieee80211_txq_teardown_flows(local);
1674
1675         wiphy_lock(local->hw.wiphy);
1676         wiphy_delayed_work_cancel(local->hw.wiphy, &local->roc_work);
1677         wiphy_work_cancel(local->hw.wiphy, &local->reconfig_filter);
1678         wiphy_work_cancel(local->hw.wiphy, &local->sched_scan_stopped_work);
1679         wiphy_work_cancel(local->hw.wiphy, &local->radar_detected_work);
1680         wiphy_unlock(local->hw.wiphy);
1681         rtnl_unlock();
1682
1683         cancel_work_sync(&local->restart_work);
1684
1685         ieee80211_clear_tx_pending(local);
1686         rate_control_deinitialize(local);
1687
1688         if (skb_queue_len(&local->skb_queue) ||
1689             skb_queue_len(&local->skb_queue_unreliable))
1690                 wiphy_warn(local->hw.wiphy, "skb_queue not empty\n");
1691         skb_queue_purge(&local->skb_queue);
1692         skb_queue_purge(&local->skb_queue_unreliable);
1693
1694         wiphy_unregister(local->hw.wiphy);
1695         destroy_workqueue(local->workqueue);
1696         ieee80211_led_exit(local);
1697         kfree(local->int_scan_req);
1698 }
1699 EXPORT_SYMBOL(ieee80211_unregister_hw);
1700
1701 static int ieee80211_free_ack_frame(int id, void *p, void *data)
1702 {
1703         WARN_ONCE(1, "Have pending ack frames!\n");
1704         kfree_skb(p);
1705         return 0;
1706 }
1707
1708 void ieee80211_free_hw(struct ieee80211_hw *hw)
1709 {
1710         struct ieee80211_local *local = hw_to_local(hw);
1711         enum nl80211_band band;
1712
1713         mutex_destroy(&local->iflist_mtx);
1714
1715         if (local->wiphy_ciphers_allocated) {
1716                 kfree(local->hw.wiphy->cipher_suites);
1717                 local->wiphy_ciphers_allocated = false;
1718         }
1719
1720         idr_for_each(&local->ack_status_frames,
1721                      ieee80211_free_ack_frame, NULL);
1722         idr_destroy(&local->ack_status_frames);
1723
1724         sta_info_stop(local);
1725
1726         ieee80211_free_led_names(local);
1727
1728         for (band = 0; band < NUM_NL80211_BANDS; band++) {
1729                 if (!(local->sband_allocated & BIT(band)))
1730                         continue;
1731                 kfree(local->hw.wiphy->bands[band]);
1732         }
1733
1734         wiphy_free(local->hw.wiphy);
1735 }
1736 EXPORT_SYMBOL(ieee80211_free_hw);
1737
1738 static const char * const drop_reasons_monitor[] = {
1739 #define V(x)    #x,
1740         [0] = "RX_DROP_MONITOR",
1741         MAC80211_DROP_REASONS_MONITOR(V)
1742 };
1743
1744 static struct drop_reason_list drop_reason_list_monitor = {
1745         .reasons = drop_reasons_monitor,
1746         .n_reasons = ARRAY_SIZE(drop_reasons_monitor),
1747 };
1748
1749 static const char * const drop_reasons_unusable[] = {
1750         [0] = "RX_DROP_UNUSABLE",
1751         MAC80211_DROP_REASONS_UNUSABLE(V)
1752 #undef V
1753 };
1754
1755 static struct drop_reason_list drop_reason_list_unusable = {
1756         .reasons = drop_reasons_unusable,
1757         .n_reasons = ARRAY_SIZE(drop_reasons_unusable),
1758 };
1759
1760 static int __init ieee80211_init(void)
1761 {
1762         struct sk_buff *skb;
1763         int ret;
1764
1765         BUILD_BUG_ON(sizeof(struct ieee80211_tx_info) > sizeof(skb->cb));
1766         BUILD_BUG_ON(offsetof(struct ieee80211_tx_info, driver_data) +
1767                      IEEE80211_TX_INFO_DRIVER_DATA_SIZE > sizeof(skb->cb));
1768
1769         ret = rc80211_minstrel_init();
1770         if (ret)
1771                 return ret;
1772
1773         ret = ieee80211_iface_init();
1774         if (ret)
1775                 goto err_netdev;
1776
1777         drop_reasons_register_subsys(SKB_DROP_REASON_SUBSYS_MAC80211_MONITOR,
1778                                      &drop_reason_list_monitor);
1779         drop_reasons_register_subsys(SKB_DROP_REASON_SUBSYS_MAC80211_UNUSABLE,
1780                                      &drop_reason_list_unusable);
1781
1782         return 0;
1783  err_netdev:
1784         rc80211_minstrel_exit();
1785
1786         return ret;
1787 }
1788
1789 static void __exit ieee80211_exit(void)
1790 {
1791         rc80211_minstrel_exit();
1792
1793         ieee80211s_stop();
1794
1795         ieee80211_iface_exit();
1796
1797         drop_reasons_unregister_subsys(SKB_DROP_REASON_SUBSYS_MAC80211_MONITOR);
1798         drop_reasons_unregister_subsys(SKB_DROP_REASON_SUBSYS_MAC80211_UNUSABLE);
1799
1800         rcu_barrier();
1801 }
1802
1803
1804 subsys_initcall(ieee80211_init);
1805 module_exit(ieee80211_exit);
1806
1807 MODULE_DESCRIPTION("IEEE 802.11 subsystem");
1808 MODULE_LICENSE("GPL");