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