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 work_struct *work)
  88 {
  89         struct ieee80211_local *local =
  90                 container_of(work, struct ieee80211_local, reconfig_filter);
  91
  92         ieee80211_configure_filter(local);
  93 }
  94
  95 static u32 ieee80211_hw_conf_chan(struct ieee80211_local *local)
  96 {
  97         struct ieee80211_sub_if_data *sdata;
  98         struct cfg80211_chan_def chandef = {};
  99         u32 changed = 0;
 100         int power;
 101         u32 offchannel_flag;
 102
 103         offchannel_flag = local->hw.conf.flags & IEEE80211_CONF_OFFCHANNEL;
 104
 105         if (local->scan_chandef.chan) {
 106                 chandef = local->scan_chandef;
 107         } else if (local->tmp_channel) {
 108                 chandef.chan = local->tmp_channel;
 109                 chandef.width = NL80211_CHAN_WIDTH_20_NOHT;
 110                 chandef.center_freq1 = chandef.chan->center_freq;
 111                 chandef.freq1_offset = chandef.chan->freq_offset;
 112         } else
 113                 chandef = local->_oper_chandef;
 114
 115         WARN(!cfg80211_chandef_valid(&chandef),
 116              "control:%d.%03d MHz width:%d center: %d.%03d/%d MHz",
 117              chandef.chan->center_freq, chandef.chan->freq_offset,
 118              chandef.width, chandef.center_freq1, chandef.freq1_offset,
 119              chandef.center_freq2);
 120
 121         if (!cfg80211_chandef_identical(&chandef, &local->_oper_chandef))
 122                 local->hw.conf.flags |= IEEE80211_CONF_OFFCHANNEL;
 123         else
 124                 local->hw.conf.flags &= ~IEEE80211_CONF_OFFCHANNEL;
 125
 126         offchannel_flag ^= local->hw.conf.flags & IEEE80211_CONF_OFFCHANNEL;
 127
 128         if (offchannel_flag ||
 129             !cfg80211_chandef_identical(&local->hw.conf.chandef,
 130                                         &local->_oper_chandef)) {
 131                 local->hw.conf.chandef = chandef;
 132                 changed |= IEEE80211_CONF_CHANGE_CHANNEL;
 133         }
 134
 135         if (!conf_is_ht(&local->hw.conf)) {
 136                 /*
 137                  * mac80211.h documents that this is only valid
 138                  * when the channel is set to an HT type, and
 139                  * that otherwise STATIC is used.
 140                  */
 141                 local->hw.conf.smps_mode = IEEE80211_SMPS_STATIC;
 142         } else if (local->hw.conf.smps_mode != local->smps_mode) {
 143                 local->hw.conf.smps_mode = local->smps_mode;
 144                 changed |= IEEE80211_CONF_CHANGE_SMPS;
 145         }
 146
 147         power = ieee80211_chandef_max_power(&chandef);
 148
 149         rcu_read_lock();
 150         list_for_each_entry_rcu(sdata, &local->interfaces, list) {
 151                 if (!rcu_access_pointer(sdata->vif.bss_conf.chanctx_conf))
 152                         continue;
 153                 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
 154                         continue;
 155                 if (sdata->vif.bss_conf.txpower == INT_MIN)
 156                         continue;
 157                 power = min(power, sdata->vif.bss_conf.txpower);
 158         }
 159         rcu_read_unlock();
 160
 161         if (local->hw.conf.power_level != power) {
 162                 changed |= IEEE80211_CONF_CHANGE_POWER;
 163                 local->hw.conf.power_level = power;
 164         }
 165
 166         return changed;
 167 }
 168
 169 int ieee80211_hw_config(struct ieee80211_local *local, u32 changed)
 170 {
 171         int ret = 0;
 172
 173         might_sleep();
 174
 175         if (!local->use_chanctx)
 176                 changed |= ieee80211_hw_conf_chan(local);
 177         else
 178                 changed &= ~(IEEE80211_CONF_CHANGE_CHANNEL |
 179                              IEEE80211_CONF_CHANGE_POWER |
 180                              IEEE80211_CONF_CHANGE_SMPS);
 181
 182         if (changed && local->open_count) {
 183                 ret = drv_config(local, changed);
 184                 /*
 185                  * Goal:
 186                  * HW reconfiguration should never fail, the driver has told
 187                  * us what it can support so it should live up to that promise.
 188                  *
 189                  * Current status:
 190                  * rfkill is not integrated with mac80211 and a
 191                  * configuration command can thus fail if hardware rfkill
 192                  * is enabled
 193                  *
 194                  * FIXME: integrate rfkill with mac80211 and then add this
 195                  * WARN_ON() back
 196                  *
 197                  */
 198                 /* WARN_ON(ret); */
 199         }
 200
 201         return ret;
 202 }
 203
 204 #define BSS_CHANGED_VIF_CFG_FLAGS (BSS_CHANGED_ASSOC |\
 205                                    BSS_CHANGED_IDLE |\
 206                                    BSS_CHANGED_PS |\
 207                                    BSS_CHANGED_IBSS |\
 208                                    BSS_CHANGED_ARP_FILTER |\
 209                                    BSS_CHANGED_SSID)
 210
 211 void ieee80211_bss_info_change_notify(struct ieee80211_sub_if_data *sdata,
 212                                       u64 changed)
 213 {
 214         struct ieee80211_local *local = sdata->local;
 215
 216         might_sleep();
 217
 218         if (!changed || sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
 219                 return;
 220
 221         if (WARN_ON_ONCE(changed & (BSS_CHANGED_BEACON |
 222                                     BSS_CHANGED_BEACON_ENABLED) &&
 223                          sdata->vif.type != NL80211_IFTYPE_AP &&
 224                          sdata->vif.type != NL80211_IFTYPE_ADHOC &&
 225                          sdata->vif.type != NL80211_IFTYPE_MESH_POINT &&
 226                          sdata->vif.type != NL80211_IFTYPE_OCB))
 227                 return;
 228
 229         if (WARN_ON_ONCE(sdata->vif.type == NL80211_IFTYPE_P2P_DEVICE ||
 230                          sdata->vif.type == NL80211_IFTYPE_NAN ||
 231                          (sdata->vif.type == NL80211_IFTYPE_MONITOR &&
 232                           !sdata->vif.bss_conf.mu_mimo_owner &&
 233                           !(changed & BSS_CHANGED_TXPOWER))))
 234                 return;
 235
 236         if (!check_sdata_in_driver(sdata))
 237                 return;
 238
 239         if (changed & BSS_CHANGED_VIF_CFG_FLAGS) {
 240                 u64 ch = changed & BSS_CHANGED_VIF_CFG_FLAGS;
 241
 242                 trace_drv_vif_cfg_changed(local, sdata, changed);
 243                 if (local->ops->vif_cfg_changed)
 244                         local->ops->vif_cfg_changed(&local->hw, &sdata->vif, ch);
 245         }
 246
 247         if (changed & ~BSS_CHANGED_VIF_CFG_FLAGS) {
 248                 u64 ch = changed & ~BSS_CHANGED_VIF_CFG_FLAGS;
 249
 250                 /* FIXME: should be for each link */
 251                 trace_drv_link_info_changed(local, sdata, &sdata->vif.bss_conf,
 252                                             changed);
 253                 if (local->ops->link_info_changed)
 254                         local->ops->link_info_changed(&local->hw, &sdata->vif,
 255                                                       &sdata->vif.bss_conf, ch);
 256         }
 257
 258         if (local->ops->bss_info_changed)
 259                 local->ops->bss_info_changed(&local->hw, &sdata->vif,
 260                                              &sdata->vif.bss_conf, changed);
 261         trace_drv_return_void(local);
 262 }
 263
 264 void ieee80211_vif_cfg_change_notify(struct ieee80211_sub_if_data *sdata,
 265                                      u64 changed)
 266 {
 267         struct ieee80211_local *local = sdata->local;
 268
 269         WARN_ON_ONCE(changed & ~BSS_CHANGED_VIF_CFG_FLAGS);
 270
 271         if (!changed || sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
 272                 return;
 273
 274         drv_vif_cfg_changed(local, sdata, changed);
 275 }
 276
 277 void ieee80211_link_info_change_notify(struct ieee80211_sub_if_data *sdata,
 278                                        struct ieee80211_link_data *link,
 279                                        u64 changed)
 280 {
 281         struct ieee80211_local *local = sdata->local;
 282
 283         WARN_ON_ONCE(changed & BSS_CHANGED_VIF_CFG_FLAGS);
 284
 285         if (!changed || sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
 286                 return;
 287
 288         if (!check_sdata_in_driver(sdata))
 289                 return;
 290
 291         drv_link_info_changed(local, sdata, link->conf, link->link_id, changed);
 292 }
 293
 294 u64 ieee80211_reset_erp_info(struct ieee80211_sub_if_data *sdata)
 295 {
 296         sdata->vif.bss_conf.use_cts_prot = false;
 297         sdata->vif.bss_conf.use_short_preamble = false;
 298         sdata->vif.bss_conf.use_short_slot = false;
 299         return BSS_CHANGED_ERP_CTS_PROT |
 300                BSS_CHANGED_ERP_PREAMBLE |
 301                BSS_CHANGED_ERP_SLOT;
 302 }
 303
 304 static void ieee80211_tasklet_handler(struct tasklet_struct *t)
 305 {
 306         struct ieee80211_local *local = from_tasklet(local, t, tasklet);
 307         struct sk_buff *skb;
 308
 309         while ((skb = skb_dequeue(&local->skb_queue)) ||
 310                (skb = skb_dequeue(&local->skb_queue_unreliable))) {
 311                 switch (skb->pkt_type) {
 312                 case IEEE80211_RX_MSG:
 313                         /* Clear skb->pkt_type in order to not confuse kernel
 314                          * netstack. */
 315                         skb->pkt_type = 0;
 316                         ieee80211_rx(&local->hw, skb);
 317                         break;
 318                 case IEEE80211_TX_STATUS_MSG:
 319                         skb->pkt_type = 0;
 320                         ieee80211_tx_status(&local->hw, skb);
 321                         break;
 322                 default:
 323                         WARN(1, "mac80211: Packet is of unknown type %d\n",
 324                              skb->pkt_type);
 325                         dev_kfree_skb(skb);
 326                         break;
 327                 }
 328         }
 329 }
 330
 331 static void ieee80211_restart_work(struct work_struct *work)
 332 {
 333         struct ieee80211_local *local =
 334                 container_of(work, struct ieee80211_local, restart_work);
 335         struct ieee80211_sub_if_data *sdata;
 336         int ret;
 337
 338         /* wait for scan work complete */
 339         flush_workqueue(local->workqueue);
 340         flush_work(&local->sched_scan_stopped_work);
 341         flush_work(&local->radar_detected_work);
 342
 343         rtnl_lock();
 344         /* we might do interface manipulations, so need both */
 345         wiphy_lock(local->hw.wiphy);
 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                                 sdata_lock(sdata);
 371                                 ieee80211_sta_connection_lost(sdata,
 372                                                               WLAN_REASON_UNSPECIFIED,
 373                                                               false);
 374                                 sdata_unlock(sdata);
 375                         }
 376                 }
 377                 flush_delayed_work(&sdata->dec_tailroom_needed_wk);
 378         }
 379         ieee80211_scan_cancel(local);
 380
 381         /* make sure any new ROC will consider local->in_reconfig */
 382         flush_delayed_work(&local->roc_work);
 383         flush_work(&local->hw_roc_done);
 384
 385         /* wait for all packet processing to be done */
 386         synchronize_net();
 387
 388         ret = ieee80211_reconfig(local);
 389         wiphy_unlock(local->hw.wiphy);
 390
 391         if (ret)
 392                 cfg80211_shutdown_all_interfaces(local->hw.wiphy);
 393
 394         rtnl_unlock();
 395 }
 396
 397 void ieee80211_restart_hw(struct ieee80211_hw *hw)
 398 {
 399         struct ieee80211_local *local = hw_to_local(hw);
 400
 401         trace_api_restart_hw(local);
 402
 403         wiphy_info(hw->wiphy,
 404                    "Hardware restart was requested\n");
 405
 406         /* use this reason, ieee80211_reconfig will unblock it */
 407         ieee80211_stop_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP,
 408                                         IEEE80211_QUEUE_STOP_REASON_SUSPEND,
 409                                         false);
 410
 411         /*
 412          * Stop all Rx during the reconfig. We don't want state changes
 413          * or driver callbacks while this is in progress.
 414          */
 415         local->in_reconfig = true;
 416         barrier();
 417
 418         queue_work(system_freezable_wq, &local->restart_work);
 419 }
 420 EXPORT_SYMBOL(ieee80211_restart_hw);
 421
 422 #ifdef CONFIG_INET
 423 static int ieee80211_ifa_changed(struct notifier_block *nb,
 424                                  unsigned long data, void *arg)
 425 {
 426         struct in_ifaddr *ifa = arg;
 427         struct ieee80211_local *local =
 428                 container_of(nb, struct ieee80211_local,
 429                              ifa_notifier);
 430         struct net_device *ndev = ifa->ifa_dev->dev;
 431         struct wireless_dev *wdev = ndev->ieee80211_ptr;
 432         struct in_device *idev;
 433         struct ieee80211_sub_if_data *sdata;
 434         struct ieee80211_vif_cfg *vif_cfg;
 435         struct ieee80211_if_managed *ifmgd;
 436         int c = 0;
 437
 438         /* Make sure it's our interface that got changed */
 439         if (!wdev)
 440                 return NOTIFY_DONE;
 441
 442         if (wdev->wiphy != local->hw.wiphy)
 443                 return NOTIFY_DONE;
 444
 445         sdata = IEEE80211_DEV_TO_SUB_IF(ndev);
 446         vif_cfg = &sdata->vif.cfg;
 447
 448         /* ARP filtering is only supported in managed mode */
 449         if (sdata->vif.type != NL80211_IFTYPE_STATION)
 450                 return NOTIFY_DONE;
 451
 452         idev = __in_dev_get_rtnl(sdata->dev);
 453         if (!idev)
 454                 return NOTIFY_DONE;
 455
 456         ifmgd = &sdata->u.mgd;
 457         sdata_lock(sdata);
 458
 459         /* Copy the addresses to the vif config list */
 460         ifa = rtnl_dereference(idev->ifa_list);
 461         while (ifa) {
 462                 if (c < IEEE80211_BSS_ARP_ADDR_LIST_LEN)
 463                         vif_cfg->arp_addr_list[c] = ifa->ifa_address;
 464                 ifa = rtnl_dereference(ifa->ifa_next);
 465                 c++;
 466         }
 467
 468         vif_cfg->arp_addr_cnt = c;
 469
 470         /* Configure driver only if associated (which also implies it is up) */
 471         if (ifmgd->associated)
 472                 ieee80211_vif_cfg_change_notify(sdata, BSS_CHANGED_ARP_FILTER);
 473
 474         sdata_unlock(sdata);
 475
 476         return NOTIFY_OK;
 477 }
 478 #endif
 479
 480 #if IS_ENABLED(CONFIG_IPV6)
 481 static int ieee80211_ifa6_changed(struct notifier_block *nb,
 482                                   unsigned long data, void *arg)
 483 {
 484         struct inet6_ifaddr *ifa = (struct inet6_ifaddr *)arg;
 485         struct inet6_dev *idev = ifa->idev;
 486         struct net_device *ndev = ifa->idev->dev;
 487         struct ieee80211_local *local =
 488                 container_of(nb, struct ieee80211_local, ifa6_notifier);
 489         struct wireless_dev *wdev = ndev->ieee80211_ptr;
 490         struct ieee80211_sub_if_data *sdata;
 491
 492         /* Make sure it's our interface that got changed */
 493         if (!wdev || wdev->wiphy != local->hw.wiphy)
 494                 return NOTIFY_DONE;
 495
 496         sdata = IEEE80211_DEV_TO_SUB_IF(ndev);
 497
 498         /*
 499          * For now only support station mode. This is mostly because
 500          * doing AP would have to handle AP_VLAN in some way ...
 501          */
 502         if (sdata->vif.type != NL80211_IFTYPE_STATION)
 503                 return NOTIFY_DONE;
 504
 505         drv_ipv6_addr_change(local, sdata, idev);
 506
 507         return NOTIFY_OK;
 508 }
 509 #endif
 510
 511 /* There isn't a lot of sense in it, but you can transmit anything you like */
 512 static const struct ieee80211_txrx_stypes
 513 ieee80211_default_mgmt_stypes[NUM_NL80211_IFTYPES] = {
 514         [NL80211_IFTYPE_ADHOC] = {
 515                 .tx = 0xffff,
 516                 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
 517                         BIT(IEEE80211_STYPE_AUTH >> 4) |
 518                         BIT(IEEE80211_STYPE_DEAUTH >> 4) |
 519                         BIT(IEEE80211_STYPE_PROBE_REQ >> 4),
 520         },
 521         [NL80211_IFTYPE_STATION] = {
 522                 .tx = 0xffff,
 523                 /*
 524                  * To support Pre Association Security Negotiation (PASN) while
 525                  * already associated to one AP, allow user space to register to
 526                  * Rx authentication frames, so that the user space logic would
 527                  * be able to receive/handle authentication frames from a
 528                  * different AP as part of PASN.
 529                  * It is expected that user space would intelligently register
 530                  * for Rx authentication frames, i.e., only when PASN is used
 531                  * and configure a match filter only for PASN authentication
 532                  * algorithm, as otherwise the MLME functionality of mac80211
 533                  * would be broken.
 534                  */
 535                 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
 536                         BIT(IEEE80211_STYPE_AUTH >> 4) |
 537                         BIT(IEEE80211_STYPE_PROBE_REQ >> 4),
 538         },
 539         [NL80211_IFTYPE_AP] = {
 540                 .tx = 0xffff,
 541                 .rx = BIT(IEEE80211_STYPE_ASSOC_REQ >> 4) |
 542                         BIT(IEEE80211_STYPE_REASSOC_REQ >> 4) |
 543                         BIT(IEEE80211_STYPE_PROBE_REQ >> 4) |
 544                         BIT(IEEE80211_STYPE_DISASSOC >> 4) |
 545                         BIT(IEEE80211_STYPE_AUTH >> 4) |
 546                         BIT(IEEE80211_STYPE_DEAUTH >> 4) |
 547                         BIT(IEEE80211_STYPE_ACTION >> 4),
 548         },
 549         [NL80211_IFTYPE_AP_VLAN] = {
 550                 /* copy AP */
 551                 .tx = 0xffff,
 552                 .rx = BIT(IEEE80211_STYPE_ASSOC_REQ >> 4) |
 553                         BIT(IEEE80211_STYPE_REASSOC_REQ >> 4) |
 554                         BIT(IEEE80211_STYPE_PROBE_REQ >> 4) |
 555                         BIT(IEEE80211_STYPE_DISASSOC >> 4) |
 556                         BIT(IEEE80211_STYPE_AUTH >> 4) |
 557                         BIT(IEEE80211_STYPE_DEAUTH >> 4) |
 558                         BIT(IEEE80211_STYPE_ACTION >> 4),
 559         },
 560         [NL80211_IFTYPE_P2P_CLIENT] = {
 561                 .tx = 0xffff,
 562                 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
 563                         BIT(IEEE80211_STYPE_PROBE_REQ >> 4),
 564         },
 565         [NL80211_IFTYPE_P2P_GO] = {
 566                 .tx = 0xffff,
 567                 .rx = BIT(IEEE80211_STYPE_ASSOC_REQ >> 4) |
 568                         BIT(IEEE80211_STYPE_REASSOC_REQ >> 4) |
 569                         BIT(IEEE80211_STYPE_PROBE_REQ >> 4) |
 570                         BIT(IEEE80211_STYPE_DISASSOC >> 4) |
 571                         BIT(IEEE80211_STYPE_AUTH >> 4) |
 572                         BIT(IEEE80211_STYPE_DEAUTH >> 4) |
 573                         BIT(IEEE80211_STYPE_ACTION >> 4),
 574         },
 575         [NL80211_IFTYPE_MESH_POINT] = {
 576                 .tx = 0xffff,
 577                 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
 578                         BIT(IEEE80211_STYPE_AUTH >> 4) |
 579                         BIT(IEEE80211_STYPE_DEAUTH >> 4),
 580         },
 581         [NL80211_IFTYPE_P2P_DEVICE] = {
 582                 .tx = 0xffff,
 583                 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
 584                         BIT(IEEE80211_STYPE_PROBE_REQ >> 4),
 585         },
 586 };
 587
 588 static const struct ieee80211_ht_cap mac80211_ht_capa_mod_mask = {
 589         .ampdu_params_info = IEEE80211_HT_AMPDU_PARM_FACTOR |
 590                              IEEE80211_HT_AMPDU_PARM_DENSITY,
 591
 592         .cap_info = cpu_to_le16(IEEE80211_HT_CAP_SUP_WIDTH_20_40 |
 593                                 IEEE80211_HT_CAP_MAX_AMSDU |
 594                                 IEEE80211_HT_CAP_SGI_20 |
 595                                 IEEE80211_HT_CAP_SGI_40 |
 596                                 IEEE80211_HT_CAP_TX_STBC |
 597                                 IEEE80211_HT_CAP_RX_STBC |
 598                                 IEEE80211_HT_CAP_LDPC_CODING |
 599                                 IEEE80211_HT_CAP_40MHZ_INTOLERANT),
 600         .mcs = {
 601                 .rx_mask = { 0xff, 0xff, 0xff, 0xff, 0xff,
 602                              0xff, 0xff, 0xff, 0xff, 0xff, },
 603         },
 604 };
 605
 606 static const struct ieee80211_vht_cap mac80211_vht_capa_mod_mask = {
 607         .vht_cap_info =
 608                 cpu_to_le32(IEEE80211_VHT_CAP_RXLDPC |
 609                             IEEE80211_VHT_CAP_SHORT_GI_80 |
 610                             IEEE80211_VHT_CAP_SHORT_GI_160 |
 611                             IEEE80211_VHT_CAP_RXSTBC_MASK |
 612                             IEEE80211_VHT_CAP_TXSTBC |
 613                             IEEE80211_VHT_CAP_SU_BEAMFORMER_CAPABLE |
 614                             IEEE80211_VHT_CAP_SU_BEAMFORMEE_CAPABLE |
 615                             IEEE80211_VHT_CAP_TX_ANTENNA_PATTERN |
 616                             IEEE80211_VHT_CAP_RX_ANTENNA_PATTERN |
 617                             IEEE80211_VHT_CAP_MAX_A_MPDU_LENGTH_EXPONENT_MASK),
 618         .supp_mcs = {
 619                 .rx_mcs_map = cpu_to_le16(~0),
 620                 .tx_mcs_map = cpu_to_le16(~0),
 621         },
 622 };
 623
 624 struct ieee80211_hw *ieee80211_alloc_hw_nm(size_t priv_data_len,
 625                                            const struct ieee80211_ops *ops,
 626                                            const char *requested_name)
 627 {
 628         struct ieee80211_local *local;
 629         int priv_size, i;
 630         struct wiphy *wiphy;
 631         bool use_chanctx;
 632
 633         if (WARN_ON(!ops->tx || !ops->start || !ops->stop || !ops->config ||
 634                     !ops->add_interface || !ops->remove_interface ||
 635                     !ops->configure_filter || !ops->wake_tx_queue))
 636                 return NULL;
 637
 638         if (WARN_ON(ops->sta_state && (ops->sta_add || ops->sta_remove)))
 639                 return NULL;
 640
 641         if (WARN_ON(!!ops->link_info_changed != !!ops->vif_cfg_changed ||
 642                     (ops->link_info_changed && ops->bss_info_changed)))
 643                 return NULL;
 644
 645         /* check all or no channel context operations exist */
 646         i = !!ops->add_chanctx + !!ops->remove_chanctx +
 647             !!ops->change_chanctx + !!ops->assign_vif_chanctx +
 648             !!ops->unassign_vif_chanctx;
 649         if (WARN_ON(i != 0 && i != 5))
 650                 return NULL;
 651         use_chanctx = i == 5;
 652
 653         /* Ensure 32-byte alignment of our private data and hw private data.
 654          * We use the wiphy priv data for both our ieee80211_local and for
 655          * the driver's private data
 656          *
 657          * In memory it'll be like this:
 658          *
 659          * +-------------------------+
 660          * | struct wiphy           |
 661          * +-------------------------+
 662          * | struct ieee80211_local  |
 663          * +-------------------------+
 664          * | driver's private data   |
 665          * +-------------------------+
 666          *
 667          */
 668         priv_size = ALIGN(sizeof(*local), NETDEV_ALIGN) + priv_data_len;
 669
 670         wiphy = wiphy_new_nm(&mac80211_config_ops, priv_size, requested_name);
 671
 672         if (!wiphy)
 673                 return NULL;
 674
 675         wiphy->mgmt_stypes = ieee80211_default_mgmt_stypes;
 676
 677         wiphy->privid = mac80211_wiphy_privid;
 678
 679         wiphy->flags |= WIPHY_FLAG_NETNS_OK |
 680                         WIPHY_FLAG_4ADDR_AP |
 681                         WIPHY_FLAG_4ADDR_STATION |
 682                         WIPHY_FLAG_REPORTS_OBSS |
 683                         WIPHY_FLAG_OFFCHAN_TX;
 684
 685         if (!use_chanctx || ops->remain_on_channel)
 686                 wiphy->flags |= WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL;
 687
 688         wiphy->features |= NL80211_FEATURE_SK_TX_STATUS |
 689                            NL80211_FEATURE_SAE |
 690                            NL80211_FEATURE_HT_IBSS |
 691                            NL80211_FEATURE_VIF_TXPOWER |
 692                            NL80211_FEATURE_MAC_ON_CREATE |
 693                            NL80211_FEATURE_USERSPACE_MPM |
 694                            NL80211_FEATURE_FULL_AP_CLIENT_STATE;
 695         wiphy_ext_feature_set(wiphy, NL80211_EXT_FEATURE_FILS_STA);
 696         wiphy_ext_feature_set(wiphy,
 697                               NL80211_EXT_FEATURE_CONTROL_PORT_OVER_NL80211);
 698         wiphy_ext_feature_set(wiphy,
 699                               NL80211_EXT_FEATURE_CONTROL_PORT_NO_PREAUTH);
 700         wiphy_ext_feature_set(wiphy,
 701                               NL80211_EXT_FEATURE_CONTROL_PORT_OVER_NL80211_TX_STATUS);
 702         wiphy_ext_feature_set(wiphy,
 703                               NL80211_EXT_FEATURE_SCAN_FREQ_KHZ);
 704         wiphy_ext_feature_set(wiphy,
 705                               NL80211_EXT_FEATURE_POWERED_ADDR_CHANGE);
 706
 707         if (!ops->hw_scan) {
 708                 wiphy->features |= NL80211_FEATURE_LOW_PRIORITY_SCAN |
 709                                    NL80211_FEATURE_AP_SCAN;
 710                 /*
 711                  * if the driver behaves correctly using the probe request
 712                  * (template) from mac80211, then both of these should be
 713                  * supported even with hw scan - but let drivers opt in.
 714                  */
 715                 wiphy_ext_feature_set(wiphy,
 716                                       NL80211_EXT_FEATURE_SCAN_RANDOM_SN);
 717                 wiphy_ext_feature_set(wiphy,
 718                                       NL80211_EXT_FEATURE_SCAN_MIN_PREQ_CONTENT);
 719         }
 720
 721         if (!ops->set_key)
 722                 wiphy->flags |= WIPHY_FLAG_IBSS_RSN;
 723
 724         wiphy_ext_feature_set(wiphy, NL80211_EXT_FEATURE_TXQS);
 725         wiphy_ext_feature_set(wiphy, NL80211_EXT_FEATURE_RRM);
 726
 727         wiphy->bss_priv_size = sizeof(struct ieee80211_bss);
 728
 729         local = wiphy_priv(wiphy);
 730
 731         if (sta_info_init(local))
 732                 goto err_free;
 733
 734         local->hw.wiphy = wiphy;
 735
 736         local->hw.priv = (char *)local + ALIGN(sizeof(*local), NETDEV_ALIGN);
 737
 738         local->ops = ops;
 739         local->use_chanctx = use_chanctx;
 740
 741         /*
 742          * We need a bit of data queued to build aggregates properly, so
 743          * instruct the TCP stack to allow more than a single ms of data
 744          * to be queued in the stack. The value is a bit-shift of 1
 745          * second, so 7 is ~8ms of queued data. Only affects local TCP
 746          * sockets.
 747          * This is the default, anyhow - drivers may need to override it
 748          * for local reasons (longer buffers, longer completion time, or
 749          * similar).
 750          */
 751         local->hw.tx_sk_pacing_shift = 7;
 752
 753         /* set up some defaults */
 754         local->hw.queues = 1;
 755         local->hw.max_rates = 1;
 756         local->hw.max_report_rates = 0;
 757         local->hw.max_rx_aggregation_subframes = IEEE80211_MAX_AMPDU_BUF_HT;
 758         local->hw.max_tx_aggregation_subframes = IEEE80211_MAX_AMPDU_BUF_HT;
 759         local->hw.offchannel_tx_hw_queue = IEEE80211_INVAL_HW_QUEUE;
 760         local->hw.conf.long_frame_max_tx_count = wiphy->retry_long;
 761         local->hw.conf.short_frame_max_tx_count = wiphy->retry_short;
 762         local->hw.radiotap_mcs_details = IEEE80211_RADIOTAP_MCS_HAVE_MCS |
 763                                          IEEE80211_RADIOTAP_MCS_HAVE_GI |
 764                                          IEEE80211_RADIOTAP_MCS_HAVE_BW;
 765         local->hw.radiotap_vht_details = IEEE80211_RADIOTAP_VHT_KNOWN_GI |
 766                                          IEEE80211_RADIOTAP_VHT_KNOWN_BANDWIDTH;
 767         local->hw.uapsd_queues = IEEE80211_DEFAULT_UAPSD_QUEUES;
 768         local->hw.uapsd_max_sp_len = IEEE80211_DEFAULT_MAX_SP_LEN;
 769         local->hw.max_mtu = IEEE80211_MAX_DATA_LEN;
 770         local->user_power_level = IEEE80211_UNSET_POWER_LEVEL;
 771         wiphy->ht_capa_mod_mask = &mac80211_ht_capa_mod_mask;
 772         wiphy->vht_capa_mod_mask = &mac80211_vht_capa_mod_mask;
 773
 774         local->ext_capa[7] = WLAN_EXT_CAPA8_OPMODE_NOTIF;
 775
 776         wiphy->extended_capabilities = local->ext_capa;
 777         wiphy->extended_capabilities_mask = local->ext_capa;
 778         wiphy->extended_capabilities_len =
 779                 ARRAY_SIZE(local->ext_capa);
 780
 781         INIT_LIST_HEAD(&local->interfaces);
 782         INIT_LIST_HEAD(&local->mon_list);
 783
 784         __hw_addr_init(&local->mc_list);
 785
 786         mutex_init(&local->iflist_mtx);
 787         mutex_init(&local->mtx);
 788
 789         mutex_init(&local->key_mtx);
 790         spin_lock_init(&local->filter_lock);
 791         spin_lock_init(&local->rx_path_lock);
 792         spin_lock_init(&local->queue_stop_reason_lock);
 793
 794         for (i = 0; i < IEEE80211_NUM_ACS; i++) {
 795                 INIT_LIST_HEAD(&local->active_txqs[i]);
 796                 spin_lock_init(&local->active_txq_lock[i]);
 797                 local->aql_txq_limit_low[i] = IEEE80211_DEFAULT_AQL_TXQ_LIMIT_L;
 798                 local->aql_txq_limit_high[i] =
 799                         IEEE80211_DEFAULT_AQL_TXQ_LIMIT_H;
 800                 atomic_set(&local->aql_ac_pending_airtime[i], 0);
 801         }
 802
 803         local->airtime_flags = AIRTIME_USE_TX | AIRTIME_USE_RX;
 804         local->aql_threshold = IEEE80211_AQL_THRESHOLD;
 805         atomic_set(&local->aql_total_pending_airtime, 0);
 806
 807         spin_lock_init(&local->handle_wake_tx_queue_lock);
 808
 809         INIT_LIST_HEAD(&local->chanctx_list);
 810         mutex_init(&local->chanctx_mtx);
 811
 812         INIT_DELAYED_WORK(&local->scan_work, ieee80211_scan_work);
 813
 814         INIT_WORK(&local->restart_work, ieee80211_restart_work);
 815
 816         INIT_WORK(&local->radar_detected_work,
 817                   ieee80211_dfs_radar_detected_work);
 818
 819         INIT_WORK(&local->reconfig_filter, ieee80211_reconfig_filter);
 820         local->smps_mode = IEEE80211_SMPS_OFF;
 821
 822         INIT_WORK(&local->dynamic_ps_enable_work,
 823                   ieee80211_dynamic_ps_enable_work);
 824         INIT_WORK(&local->dynamic_ps_disable_work,
 825                   ieee80211_dynamic_ps_disable_work);
 826         timer_setup(&local->dynamic_ps_timer, ieee80211_dynamic_ps_timer, 0);
 827
 828         INIT_WORK(&local->sched_scan_stopped_work,
 829                   ieee80211_sched_scan_stopped_work);
 830
 831         spin_lock_init(&local->ack_status_lock);
 832         idr_init(&local->ack_status_frames);
 833
 834         for (i = 0; i < IEEE80211_MAX_QUEUES; i++) {
 835                 skb_queue_head_init(&local->pending[i]);
 836                 atomic_set(&local->agg_queue_stop[i], 0);
 837         }
 838         tasklet_setup(&local->tx_pending_tasklet, ieee80211_tx_pending);
 839         tasklet_setup(&local->wake_txqs_tasklet, ieee80211_wake_txqs);
 840         tasklet_setup(&local->tasklet, ieee80211_tasklet_handler);
 841
 842         skb_queue_head_init(&local->skb_queue);
 843         skb_queue_head_init(&local->skb_queue_unreliable);
 844
 845         ieee80211_alloc_led_names(local);
 846
 847         ieee80211_roc_setup(local);
 848
 849         local->hw.radiotap_timestamp.units_pos = -1;
 850         local->hw.radiotap_timestamp.accuracy = -1;
 851
 852         return &local->hw;
 853  err_free:
 854         wiphy_free(wiphy);
 855         return NULL;
 856 }
 857 EXPORT_SYMBOL(ieee80211_alloc_hw_nm);
 858
 859 static int ieee80211_init_cipher_suites(struct ieee80211_local *local)
 860 {
 861         bool have_wep = !fips_enabled; /* FIPS does not permit the use of RC4 */
 862         bool have_mfp = ieee80211_hw_check(&local->hw, MFP_CAPABLE);
 863         int r = 0, w = 0;
 864         u32 *suites;
 865         static const u32 cipher_suites[] = {
 866                 /* keep WEP first, it may be removed below */
 867                 WLAN_CIPHER_SUITE_WEP40,
 868                 WLAN_CIPHER_SUITE_WEP104,
 869                 WLAN_CIPHER_SUITE_TKIP,
 870                 WLAN_CIPHER_SUITE_CCMP,
 871                 WLAN_CIPHER_SUITE_CCMP_256,
 872                 WLAN_CIPHER_SUITE_GCMP,
 873                 WLAN_CIPHER_SUITE_GCMP_256,
 874
 875                 /* keep last -- depends on hw flags! */
 876                 WLAN_CIPHER_SUITE_AES_CMAC,
 877                 WLAN_CIPHER_SUITE_BIP_CMAC_256,
 878                 WLAN_CIPHER_SUITE_BIP_GMAC_128,
 879                 WLAN_CIPHER_SUITE_BIP_GMAC_256,
 880         };
 881
 882         if (ieee80211_hw_check(&local->hw, SW_CRYPTO_CONTROL) ||
 883             local->hw.wiphy->cipher_suites) {
 884                 /* If the driver advertises, or doesn't support SW crypto,
 885                  * we only need to remove WEP if necessary.
 886                  */
 887                 if (have_wep)
 888                         return 0;
 889
 890                 /* well if it has _no_ ciphers ... fine */
 891                 if (!local->hw.wiphy->n_cipher_suites)
 892                         return 0;
 893
 894                 /* Driver provides cipher suites, but we need to exclude WEP */
 895                 suites = kmemdup(local->hw.wiphy->cipher_suites,
 896                                  sizeof(u32) * local->hw.wiphy->n_cipher_suites,
 897                                  GFP_KERNEL);
 898                 if (!suites)
 899                         return -ENOMEM;
 900
 901                 for (r = 0; r < local->hw.wiphy->n_cipher_suites; r++) {
 902                         u32 suite = local->hw.wiphy->cipher_suites[r];
 903
 904                         if (suite == WLAN_CIPHER_SUITE_WEP40 ||
 905                             suite == WLAN_CIPHER_SUITE_WEP104)
 906                                 continue;
 907                         suites[w++] = suite;
 908                 }
 909         } else {
 910                 /* assign the (software supported and perhaps offloaded)
 911                  * cipher suites
 912                  */
 913                 local->hw.wiphy->cipher_suites = cipher_suites;
 914                 local->hw.wiphy->n_cipher_suites = ARRAY_SIZE(cipher_suites);
 915
 916                 if (!have_mfp)
 917                         local->hw.wiphy->n_cipher_suites -= 4;
 918
 919                 if (!have_wep) {
 920                         local->hw.wiphy->cipher_suites += 2;
 921                         local->hw.wiphy->n_cipher_suites -= 2;
 922                 }
 923
 924                 /* not dynamically allocated, so just return */
 925                 return 0;
 926         }
 927
 928         local->hw.wiphy->cipher_suites = suites;
 929         local->hw.wiphy->n_cipher_suites = w;
 930         local->wiphy_ciphers_allocated = true;
 931
 932         return 0;
 933 }
 934
 935 int ieee80211_register_hw(struct ieee80211_hw *hw)
 936 {
 937         struct ieee80211_local *local = hw_to_local(hw);
 938         int result, i;
 939         enum nl80211_band band;
 940         int channels, max_bitrates;
 941         bool supp_ht, supp_vht, supp_he, supp_eht;
 942         struct cfg80211_chan_def dflt_chandef = {};
 943
 944         if (ieee80211_hw_check(hw, QUEUE_CONTROL) &&
 945             (local->hw.offchannel_tx_hw_queue == IEEE80211_INVAL_HW_QUEUE ||
 946              local->hw.offchannel_tx_hw_queue >= local->hw.queues))
 947                 return -EINVAL;
 948
 949         if ((hw->wiphy->features & NL80211_FEATURE_TDLS_CHANNEL_SWITCH) &&
 950             (!local->ops->tdls_channel_switch ||
 951              !local->ops->tdls_cancel_channel_switch ||
 952              !local->ops->tdls_recv_channel_switch))
 953                 return -EOPNOTSUPP;
 954
 955         if (WARN_ON(ieee80211_hw_check(hw, SUPPORTS_TX_FRAG) &&
 956                     !local->ops->set_frag_threshold))
 957                 return -EINVAL;
 958
 959         if (WARN_ON(local->hw.wiphy->interface_modes &
 960                         BIT(NL80211_IFTYPE_NAN) &&
 961                     (!local->ops->start_nan || !local->ops->stop_nan)))
 962                 return -EINVAL;
 963
 964         if (hw->wiphy->flags & WIPHY_FLAG_SUPPORTS_MLO) {
 965                 /*
 966                  * For drivers capable of doing MLO, assume modern driver
 967                  * or firmware facilities, so software doesn't have to do
 968                  * as much, e.g. monitoring beacons would be hard if we
 969                  * might not even know which link is active at which time.
 970                  */
 971                 if (WARN_ON(!local->use_chanctx))
 972                         return -EINVAL;
 973
 974                 if (WARN_ON(!local->ops->link_info_changed))
 975                         return -EINVAL;
 976
 977                 if (WARN_ON(!ieee80211_hw_check(hw, HAS_RATE_CONTROL)))
 978                         return -EINVAL;
 979
 980                 if (WARN_ON(!ieee80211_hw_check(hw, AMPDU_AGGREGATION)))
 981                         return -EINVAL;
 982
 983                 if (WARN_ON(ieee80211_hw_check(hw, HOST_BROADCAST_PS_BUFFERING)))
 984                         return -EINVAL;
 985
 986                 if (WARN_ON(ieee80211_hw_check(hw, SUPPORTS_PS) &&
 987                             (!ieee80211_hw_check(hw, SUPPORTS_DYNAMIC_PS) ||
 988                              ieee80211_hw_check(hw, PS_NULLFUNC_STACK))))
 989                         return -EINVAL;
 990
 991                 if (WARN_ON(!ieee80211_hw_check(hw, MFP_CAPABLE)))
 992                         return -EINVAL;
 993
 994                 if (WARN_ON(!ieee80211_hw_check(hw, CONNECTION_MONITOR)))
 995                         return -EINVAL;
 996
 997                 if (WARN_ON(ieee80211_hw_check(hw, NEED_DTIM_BEFORE_ASSOC)))
 998                         return -EINVAL;
 999
1000                 if (WARN_ON(ieee80211_hw_check(hw, TIMING_BEACON_ONLY)))
1001                         return -EINVAL;
1002
1003                 if (WARN_ON(!ieee80211_hw_check(hw, AP_LINK_PS)))
1004                         return -EINVAL;
1005
1006                 if (WARN_ON(ieee80211_hw_check(hw, DEAUTH_NEED_MGD_TX_PREP)))
1007                         return -EINVAL;
1008         }
1009
1010 #ifdef CONFIG_PM
1011         if (hw->wiphy->wowlan && (!local->ops->suspend || !local->ops->resume))
1012                 return -EINVAL;
1013 #endif
1014
1015         if (!local->use_chanctx) {
1016                 for (i = 0; i < local->hw.wiphy->n_iface_combinations; i++) {
1017                         const struct ieee80211_iface_combination *comb;
1018
1019                         comb = &local->hw.wiphy->iface_combinations[i];
1020
1021                         if (comb->num_different_channels > 1)
1022                                 return -EINVAL;
1023                 }
1024         } else {
1025                 /* DFS is not supported with multi-channel combinations yet */
1026                 for (i = 0; i < local->hw.wiphy->n_iface_combinations; i++) {
1027                         const struct ieee80211_iface_combination *comb;
1028
1029                         comb = &local->hw.wiphy->iface_combinations[i];
1030
1031                         if (comb->radar_detect_widths &&
1032                             comb->num_different_channels > 1)
1033                                 return -EINVAL;
1034                 }
1035         }
1036
1037         /* Only HW csum features are currently compatible with mac80211 */
1038         if (WARN_ON(hw->netdev_features & ~MAC80211_SUPPORTED_FEATURES))
1039                 return -EINVAL;
1040
1041         if (hw->max_report_rates == 0)
1042                 hw->max_report_rates = hw->max_rates;
1043
1044         local->rx_chains = 1;
1045
1046         /*
1047          * generic code guarantees at least one band,
1048          * set this very early because much code assumes
1049          * that hw.conf.channel is assigned
1050          */
1051         channels = 0;
1052         max_bitrates = 0;
1053         supp_ht = false;
1054         supp_vht = false;
1055         supp_he = false;
1056         supp_eht = false;
1057         for (band = 0; band < NUM_NL80211_BANDS; band++) {
1058                 struct ieee80211_supported_band *sband;
1059
1060                 sband = local->hw.wiphy->bands[band];
1061                 if (!sband)
1062                         continue;
1063
1064                 if (!dflt_chandef.chan) {
1065                         /*
1066                          * Assign the first enabled channel to dflt_chandef
1067                          * from the list of channels
1068                          */
1069                         for (i = 0; i < sband->n_channels; i++)
1070                                 if (!(sband->channels[i].flags &
1071                                                 IEEE80211_CHAN_DISABLED))
1072                                         break;
1073                         /* if none found then use the first anyway */
1074                         if (i == sband->n_channels)
1075                                 i = 0;
1076                         cfg80211_chandef_create(&dflt_chandef,
1077                                                 &sband->channels[i],
1078                                                 NL80211_CHAN_NO_HT);
1079                         /* init channel we're on */
1080                         if (!local->use_chanctx && !local->_oper_chandef.chan) {
1081                                 local->hw.conf.chandef = dflt_chandef;
1082                                 local->_oper_chandef = dflt_chandef;
1083                         }
1084                         local->monitor_chandef = dflt_chandef;
1085                 }
1086
1087                 channels += sband->n_channels;
1088
1089                 /*
1090                  * Due to the way the aggregation code handles this and it
1091                  * being an HT capability, we can't really support delayed
1092                  * BA in MLO (yet).
1093                  */
1094                 if (WARN_ON(sband->ht_cap.ht_supported &&
1095                             (sband->ht_cap.cap & IEEE80211_HT_CAP_DELAY_BA) &&
1096                             hw->wiphy->flags & WIPHY_FLAG_SUPPORTS_MLO))
1097                         return -EINVAL;
1098
1099                 if (max_bitrates < sband->n_bitrates)
1100                         max_bitrates = sband->n_bitrates;
1101                 supp_ht = supp_ht || sband->ht_cap.ht_supported;
1102                 supp_vht = supp_vht || sband->vht_cap.vht_supported;
1103
1104                 for (i = 0; i < sband->n_iftype_data; i++) {
1105                         const struct ieee80211_sband_iftype_data *iftd;
1106
1107                         iftd = &sband->iftype_data[i];
1108
1109                         supp_he = supp_he || iftd->he_cap.has_he;
1110                         supp_eht = supp_eht || iftd->eht_cap.has_eht;
1111                 }
1112
1113                 /* HT, VHT, HE require QoS, thus >= 4 queues */
1114                 if (WARN_ON(local->hw.queues < IEEE80211_NUM_ACS &&
1115                             (supp_ht || supp_vht || supp_he)))
1116                         return -EINVAL;
1117
1118                 /* EHT requires HE support */
1119                 if (WARN_ON(supp_eht && !supp_he))
1120                         return -EINVAL;
1121
1122                 if (!sband->ht_cap.ht_supported)
1123                         continue;
1124
1125                 /* TODO: consider VHT for RX chains, hopefully it's the same */
1126                 local->rx_chains =
1127                         max(ieee80211_mcs_to_chains(&sband->ht_cap.mcs),
1128                             local->rx_chains);
1129
1130                 /* no need to mask, SM_PS_DISABLED has all bits set */
1131                 sband->ht_cap.cap |= WLAN_HT_CAP_SM_PS_DISABLED <<
1132                                      IEEE80211_HT_CAP_SM_PS_SHIFT;
1133         }
1134
1135         /* if low-level driver supports AP, we also support VLAN.
1136          * drivers advertising SW_CRYPTO_CONTROL should enable AP_VLAN
1137          * based on their support to transmit SW encrypted packets.
1138          */
1139         if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_AP) &&
1140             !ieee80211_hw_check(&local->hw, SW_CRYPTO_CONTROL)) {
1141                 hw->wiphy->interface_modes |= BIT(NL80211_IFTYPE_AP_VLAN);
1142                 hw->wiphy->software_iftypes |= BIT(NL80211_IFTYPE_AP_VLAN);
1143         }
1144
1145         /* mac80211 always supports monitor */
1146         hw->wiphy->interface_modes |= BIT(NL80211_IFTYPE_MONITOR);
1147         hw->wiphy->software_iftypes |= BIT(NL80211_IFTYPE_MONITOR);
1148
1149         /* mac80211 doesn't support more than one IBSS interface right now */
1150         for (i = 0; i < hw->wiphy->n_iface_combinations; i++) {
1151                 const struct ieee80211_iface_combination *c;
1152                 int j;
1153
1154                 c = &hw->wiphy->iface_combinations[i];
1155
1156                 for (j = 0; j < c->n_limits; j++)
1157                         if ((c->limits[j].types & BIT(NL80211_IFTYPE_ADHOC)) &&
1158                             c->limits[j].max > 1)
1159                                 return -EINVAL;
1160         }
1161
1162         local->int_scan_req = kzalloc(sizeof(*local->int_scan_req) +
1163                                       sizeof(void *) * channels, GFP_KERNEL);
1164         if (!local->int_scan_req)
1165                 return -ENOMEM;
1166
1167         eth_broadcast_addr(local->int_scan_req->bssid);
1168
1169         for (band = 0; band < NUM_NL80211_BANDS; band++) {
1170                 if (!local->hw.wiphy->bands[band])
1171                         continue;
1172                 local->int_scan_req->rates[band] = (u32) -1;
1173         }
1174
1175 #ifndef CONFIG_MAC80211_MESH
1176         /* mesh depends on Kconfig, but drivers should set it if they want */
1177         local->hw.wiphy->interface_modes &= ~BIT(NL80211_IFTYPE_MESH_POINT);
1178 #endif
1179
1180         /* if the underlying driver supports mesh, mac80211 will (at least)
1181          * provide routing of mesh authentication frames to userspace */
1182         if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_MESH_POINT))
1183                 local->hw.wiphy->flags |= WIPHY_FLAG_MESH_AUTH;
1184
1185         /* mac80211 supports control port protocol changing */
1186         local->hw.wiphy->flags |= WIPHY_FLAG_CONTROL_PORT_PROTOCOL;
1187
1188         if (ieee80211_hw_check(&local->hw, SIGNAL_DBM)) {
1189                 local->hw.wiphy->signal_type = CFG80211_SIGNAL_TYPE_MBM;
1190         } else if (ieee80211_hw_check(&local->hw, SIGNAL_UNSPEC)) {
1191                 local->hw.wiphy->signal_type = CFG80211_SIGNAL_TYPE_UNSPEC;
1192                 if (hw->max_signal <= 0) {
1193                         result = -EINVAL;
1194                         goto fail_workqueue;
1195                 }
1196         }
1197
1198         /* Mac80211 and therefore all drivers using SW crypto only
1199          * are able to handle PTK rekeys and Extended Key ID.
1200          */
1201         if (!local->ops->set_key) {
1202                 wiphy_ext_feature_set(local->hw.wiphy,
1203                                       NL80211_EXT_FEATURE_CAN_REPLACE_PTK0);
1204                 wiphy_ext_feature_set(local->hw.wiphy,
1205                                       NL80211_EXT_FEATURE_EXT_KEY_ID);
1206         }
1207
1208         if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_ADHOC))
1209                 wiphy_ext_feature_set(local->hw.wiphy,
1210                                       NL80211_EXT_FEATURE_DEL_IBSS_STA);
1211
1212         /*
1213          * Calculate scan IE length -- we need this to alloc
1214          * memory and to subtract from the driver limit. It
1215          * includes the DS Params, (extended) supported rates, and HT
1216          * information -- SSID is the driver's responsibility.
1217          */
1218         local->scan_ies_len = 4 + max_bitrates /* (ext) supp rates */ +
1219                 3 /* DS Params */;
1220         if (supp_ht)
1221                 local->scan_ies_len += 2 + sizeof(struct ieee80211_ht_cap);
1222
1223         if (supp_vht)
1224                 local->scan_ies_len +=
1225                         2 + sizeof(struct ieee80211_vht_cap);
1226
1227         /*
1228          * HE cap element is variable in size - set len to allow max size */
1229         if (supp_he) {
1230                 local->scan_ies_len +=
1231                         3 + sizeof(struct ieee80211_he_cap_elem) +
1232                         sizeof(struct ieee80211_he_mcs_nss_supp) +
1233                         IEEE80211_HE_PPE_THRES_MAX_LEN;
1234
1235                 if (supp_eht)
1236                         local->scan_ies_len +=
1237                                 3 + sizeof(struct ieee80211_eht_cap_elem) +
1238                                 sizeof(struct ieee80211_eht_mcs_nss_supp) +
1239                                 IEEE80211_EHT_PPE_THRES_MAX_LEN;
1240         }
1241
1242         if (!local->ops->hw_scan) {
1243                 /* For hw_scan, driver needs to set these up. */
1244                 local->hw.wiphy->max_scan_ssids = 4;
1245                 local->hw.wiphy->max_scan_ie_len = IEEE80211_MAX_DATA_LEN;
1246         }
1247
1248         /*
1249          * If the driver supports any scan IEs, then assume the
1250          * limit includes the IEs mac80211 will add, otherwise
1251          * leave it at zero and let the driver sort it out; we
1252          * still pass our IEs to the driver but userspace will
1253          * not be allowed to in that case.
1254          */
1255         if (local->hw.wiphy->max_scan_ie_len)
1256                 local->hw.wiphy->max_scan_ie_len -= local->scan_ies_len;
1257
1258         result = ieee80211_init_cipher_suites(local);
1259         if (result < 0)
1260                 goto fail_workqueue;
1261
1262         if (!local->ops->remain_on_channel)
1263                 local->hw.wiphy->max_remain_on_channel_duration = 5000;
1264
1265         /* mac80211 based drivers don't support internal TDLS setup */
1266         if (local->hw.wiphy->flags & WIPHY_FLAG_SUPPORTS_TDLS)
1267                 local->hw.wiphy->flags |= WIPHY_FLAG_TDLS_EXTERNAL_SETUP;
1268
1269         /* mac80211 supports eCSA, if the driver supports STA CSA at all */
1270         if (ieee80211_hw_check(&local->hw, CHANCTX_STA_CSA))
1271                 local->ext_capa[0] |= WLAN_EXT_CAPA1_EXT_CHANNEL_SWITCHING;
1272
1273         /* mac80211 supports multi BSSID, if the driver supports it */
1274         if (ieee80211_hw_check(&local->hw, SUPPORTS_MULTI_BSSID)) {
1275                 local->hw.wiphy->support_mbssid = true;
1276                 if (ieee80211_hw_check(&local->hw,
1277                                        SUPPORTS_ONLY_HE_MULTI_BSSID))
1278                         local->hw.wiphy->support_only_he_mbssid = true;
1279                 else
1280                         local->ext_capa[2] |=
1281                                 WLAN_EXT_CAPA3_MULTI_BSSID_SUPPORT;
1282         }
1283
1284         local->hw.wiphy->max_num_csa_counters = IEEE80211_MAX_CNTDWN_COUNTERS_NUM;
1285
1286         /*
1287          * We use the number of queues for feature tests (QoS, HT) internally
1288          * so restrict them appropriately.
1289          */
1290         if (hw->queues > IEEE80211_MAX_QUEUES)
1291                 hw->queues = IEEE80211_MAX_QUEUES;
1292
1293         local->workqueue =
1294                 alloc_ordered_workqueue("%s", 0, wiphy_name(local->hw.wiphy));
1295         if (!local->workqueue) {
1296                 result = -ENOMEM;
1297                 goto fail_workqueue;
1298         }
1299
1300         /*
1301          * The hardware needs headroom for sending the frame,
1302          * and we need some headroom for passing the frame to monitor
1303          * interfaces, but never both at the same time.
1304          */
1305         local->tx_headroom = max_t(unsigned int , local->hw.extra_tx_headroom,
1306                                    IEEE80211_TX_STATUS_HEADROOM);
1307
1308         /*
1309          * if the driver doesn't specify a max listen interval we
1310          * use 5 which should be a safe default
1311          */
1312         if (local->hw.max_listen_interval == 0)
1313                 local->hw.max_listen_interval = 5;
1314
1315         local->hw.conf.listen_interval = local->hw.max_listen_interval;
1316
1317         local->dynamic_ps_forced_timeout = -1;
1318
1319         if (!local->hw.max_nan_de_entries)
1320                 local->hw.max_nan_de_entries = IEEE80211_MAX_NAN_INSTANCE_ID;
1321
1322         if (!local->hw.weight_multiplier)
1323                 local->hw.weight_multiplier = 1;
1324
1325         ieee80211_wep_init(local);
1326
1327         local->hw.conf.flags = IEEE80211_CONF_IDLE;
1328
1329         ieee80211_led_init(local);
1330
1331         result = ieee80211_txq_setup_flows(local);
1332         if (result)
1333                 goto fail_flows;
1334
1335         rtnl_lock();
1336         result = ieee80211_init_rate_ctrl_alg(local,
1337                                               hw->rate_control_algorithm);
1338         rtnl_unlock();
1339         if (result < 0) {
1340                 wiphy_debug(local->hw.wiphy,
1341                             "Failed to initialize rate control algorithm\n");
1342                 goto fail_rate;
1343         }
1344
1345         if (local->rate_ctrl) {
1346                 clear_bit(IEEE80211_HW_SUPPORTS_VHT_EXT_NSS_BW, hw->flags);
1347                 if (local->rate_ctrl->ops->capa & RATE_CTRL_CAPA_VHT_EXT_NSS_BW)
1348                         ieee80211_hw_set(hw, SUPPORTS_VHT_EXT_NSS_BW);
1349         }
1350
1351         /*
1352          * If the VHT capabilities don't have IEEE80211_VHT_EXT_NSS_BW_CAPABLE,
1353          * or have it when we don't, copy the sband structure and set/clear it.
1354          * This is necessary because rate scaling algorithms could be switched
1355          * and have different support values.
1356          * Print a message so that in the common case the reallocation can be
1357          * avoided.
1358          */
1359         BUILD_BUG_ON(NUM_NL80211_BANDS > 8 * sizeof(local->sband_allocated));
1360         for (band = 0; band < NUM_NL80211_BANDS; band++) {
1361                 struct ieee80211_supported_band *sband;
1362                 bool local_cap, ie_cap;
1363
1364                 local_cap = ieee80211_hw_check(hw, SUPPORTS_VHT_EXT_NSS_BW);
1365
1366                 sband = local->hw.wiphy->bands[band];
1367                 if (!sband || !sband->vht_cap.vht_supported)
1368                         continue;
1369
1370                 ie_cap = !!(sband->vht_cap.vht_mcs.tx_highest &
1371                             cpu_to_le16(IEEE80211_VHT_EXT_NSS_BW_CAPABLE));
1372
1373                 if (local_cap == ie_cap)
1374                         continue;
1375
1376                 sband = kmemdup(sband, sizeof(*sband), GFP_KERNEL);
1377                 if (!sband) {
1378                         result = -ENOMEM;
1379                         goto fail_rate;
1380                 }
1381
1382                 wiphy_dbg(hw->wiphy, "copying sband (band %d) due to VHT EXT NSS BW flag\n",
1383                           band);
1384
1385                 sband->vht_cap.vht_mcs.tx_highest ^=
1386                         cpu_to_le16(IEEE80211_VHT_EXT_NSS_BW_CAPABLE);
1387
1388                 local->hw.wiphy->bands[band] = sband;
1389                 local->sband_allocated |= BIT(band);
1390         }
1391
1392         result = wiphy_register(local->hw.wiphy);
1393         if (result < 0)
1394                 goto fail_wiphy_register;
1395
1396         debugfs_hw_add(local);
1397         rate_control_add_debugfs(local);
1398
1399         rtnl_lock();
1400         wiphy_lock(hw->wiphy);
1401
1402         /* add one default STA interface if supported */
1403         if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_STATION) &&
1404             !ieee80211_hw_check(hw, NO_AUTO_VIF)) {
1405                 struct vif_params params = {0};
1406
1407                 result = ieee80211_if_add(local, "wlan%d", NET_NAME_ENUM, NULL,
1408                                           NL80211_IFTYPE_STATION, &params);
1409                 if (result)
1410                         wiphy_warn(local->hw.wiphy,
1411                                    "Failed to add default virtual iface\n");
1412         }
1413
1414         wiphy_unlock(hw->wiphy);
1415         rtnl_unlock();
1416
1417 #ifdef CONFIG_INET
1418         local->ifa_notifier.notifier_call = ieee80211_ifa_changed;
1419         result = register_inetaddr_notifier(&local->ifa_notifier);
1420         if (result)
1421                 goto fail_ifa;
1422 #endif
1423
1424 #if IS_ENABLED(CONFIG_IPV6)
1425         local->ifa6_notifier.notifier_call = ieee80211_ifa6_changed;
1426         result = register_inet6addr_notifier(&local->ifa6_notifier);
1427         if (result)
1428                 goto fail_ifa6;
1429 #endif
1430
1431         return 0;
1432
1433 #if IS_ENABLED(CONFIG_IPV6)
1434  fail_ifa6:
1435 #ifdef CONFIG_INET
1436         unregister_inetaddr_notifier(&local->ifa_notifier);
1437 #endif
1438 #endif
1439 #if defined(CONFIG_INET) || defined(CONFIG_IPV6)
1440  fail_ifa:
1441 #endif
1442         wiphy_unregister(local->hw.wiphy);
1443  fail_wiphy_register:
1444         rtnl_lock();
1445         rate_control_deinitialize(local);
1446         ieee80211_remove_interfaces(local);
1447         rtnl_unlock();
1448  fail_rate:
1449  fail_flows:
1450         ieee80211_led_exit(local);
1451         destroy_workqueue(local->workqueue);
1452  fail_workqueue:
1453         if (local->wiphy_ciphers_allocated) {
1454                 kfree(local->hw.wiphy->cipher_suites);
1455                 local->wiphy_ciphers_allocated = false;
1456         }
1457         kfree(local->int_scan_req);
1458         return result;
1459 }
1460 EXPORT_SYMBOL(ieee80211_register_hw);
1461
1462 void ieee80211_unregister_hw(struct ieee80211_hw *hw)
1463 {
1464         struct ieee80211_local *local = hw_to_local(hw);
1465
1466         tasklet_kill(&local->tx_pending_tasklet);
1467         tasklet_kill(&local->tasklet);
1468
1469 #ifdef CONFIG_INET
1470         unregister_inetaddr_notifier(&local->ifa_notifier);
1471 #endif
1472 #if IS_ENABLED(CONFIG_IPV6)
1473         unregister_inet6addr_notifier(&local->ifa6_notifier);
1474 #endif
1475
1476         rtnl_lock();
1477
1478         /*
1479          * At this point, interface list manipulations are fine
1480          * because the driver cannot be handing us frames any
1481          * more and the tasklet is killed.
1482          */
1483         ieee80211_remove_interfaces(local);
1484
1485         rtnl_unlock();
1486
1487         cancel_delayed_work_sync(&local->roc_work);
1488         cancel_work_sync(&local->restart_work);
1489         cancel_work_sync(&local->reconfig_filter);
1490         flush_work(&local->sched_scan_stopped_work);
1491         flush_work(&local->radar_detected_work);
1492
1493         ieee80211_clear_tx_pending(local);
1494         rate_control_deinitialize(local);
1495
1496         if (skb_queue_len(&local->skb_queue) ||
1497             skb_queue_len(&local->skb_queue_unreliable))
1498                 wiphy_warn(local->hw.wiphy, "skb_queue not empty\n");
1499         skb_queue_purge(&local->skb_queue);
1500         skb_queue_purge(&local->skb_queue_unreliable);
1501
1502         wiphy_unregister(local->hw.wiphy);
1503         destroy_workqueue(local->workqueue);
1504         ieee80211_led_exit(local);
1505         kfree(local->int_scan_req);
1506 }
1507 EXPORT_SYMBOL(ieee80211_unregister_hw);
1508
1509 static int ieee80211_free_ack_frame(int id, void *p, void *data)
1510 {
1511         WARN_ONCE(1, "Have pending ack frames!\n");
1512         kfree_skb(p);
1513         return 0;
1514 }
1515
1516 void ieee80211_free_hw(struct ieee80211_hw *hw)
1517 {
1518         struct ieee80211_local *local = hw_to_local(hw);
1519         enum nl80211_band band;
1520
1521         mutex_destroy(&local->iflist_mtx);
1522         mutex_destroy(&local->mtx);
1523
1524         if (local->wiphy_ciphers_allocated) {
1525                 kfree(local->hw.wiphy->cipher_suites);
1526                 local->wiphy_ciphers_allocated = false;
1527         }
1528
1529         idr_for_each(&local->ack_status_frames,
1530                      ieee80211_free_ack_frame, NULL);
1531         idr_destroy(&local->ack_status_frames);
1532
1533         sta_info_stop(local);
1534
1535         ieee80211_free_led_names(local);
1536
1537         for (band = 0; band < NUM_NL80211_BANDS; band++) {
1538                 if (!(local->sband_allocated & BIT(band)))
1539                         continue;
1540                 kfree(local->hw.wiphy->bands[band]);
1541         }
1542
1543         wiphy_free(local->hw.wiphy);
1544 }
1545 EXPORT_SYMBOL(ieee80211_free_hw);
1546
1547 static const char * const drop_reasons_monitor[] = {
1548 #define V(x)    #x,
1549         [0] = "RX_DROP_MONITOR",
1550         MAC80211_DROP_REASONS_MONITOR(V)
1551 };
1552
1553 static struct drop_reason_list drop_reason_list_monitor = {
1554         .reasons = drop_reasons_monitor,
1555         .n_reasons = ARRAY_SIZE(drop_reasons_monitor),
1556 };
1557
1558 static const char * const drop_reasons_unusable[] = {
1559         [0] = "RX_DROP_UNUSABLE",
1560         MAC80211_DROP_REASONS_UNUSABLE(V)
1561 #undef V
1562 };
1563
1564 static struct drop_reason_list drop_reason_list_unusable = {
1565         .reasons = drop_reasons_unusable,
1566         .n_reasons = ARRAY_SIZE(drop_reasons_unusable),
1567 };
1568
1569 static int __init ieee80211_init(void)
1570 {
1571         struct sk_buff *skb;
1572         int ret;
1573
1574         BUILD_BUG_ON(sizeof(struct ieee80211_tx_info) > sizeof(skb->cb));
1575         BUILD_BUG_ON(offsetof(struct ieee80211_tx_info, driver_data) +
1576                      IEEE80211_TX_INFO_DRIVER_DATA_SIZE > sizeof(skb->cb));
1577
1578         ret = rc80211_minstrel_init();
1579         if (ret)
1580                 return ret;
1581
1582         ret = ieee80211_iface_init();
1583         if (ret)
1584                 goto err_netdev;
1585
1586         drop_reasons_register_subsys(SKB_DROP_REASON_SUBSYS_MAC80211_MONITOR,
1587                                      &drop_reason_list_monitor);
1588         drop_reasons_register_subsys(SKB_DROP_REASON_SUBSYS_MAC80211_UNUSABLE,
1589                                      &drop_reason_list_unusable);
1590
1591         return 0;
1592  err_netdev:
1593         rc80211_minstrel_exit();
1594
1595         return ret;
1596 }
1597
1598 static void __exit ieee80211_exit(void)
1599 {
1600         rc80211_minstrel_exit();
1601
1602         ieee80211s_stop();
1603
1604         ieee80211_iface_exit();
1605
1606         drop_reasons_unregister_subsys(SKB_DROP_REASON_SUBSYS_MAC80211_MONITOR);
1607         drop_reasons_unregister_subsys(SKB_DROP_REASON_SUBSYS_MAC80211_UNUSABLE);
1608
1609         rcu_barrier();
1610 }
1611
1612
1613 subsys_initcall(ieee80211_init);
1614 module_exit(ieee80211_exit);
1615
1616 MODULE_DESCRIPTION("IEEE 802.11 subsystem");
1617 MODULE_LICENSE("GPL");