net/mac80211/main.c

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