net/mac80211/main.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  * Copyright 2002-2005, Instant802 Networks, Inc.
   4  * Copyright 2005-2006, Devicescape Software, Inc.
   5  * Copyright 2006-2007  Jiri Benc <[email protected]>
   6  * Copyright 2013-2014  Intel Mobile Communications GmbH
   7  * Copyright (C) 2017     Intel Deutschland GmbH
   8  * Copyright (C) 2018-2022 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 u32 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                         cancel_work_sync(&sdata->u.mgd.csa_connection_drop_work);
 368                         if (sdata->vif.bss_conf.csa_active) {
 369                                 sdata_lock(sdata);
 370                                 ieee80211_sta_connection_lost(sdata,
 371                                                               WLAN_REASON_UNSPECIFIED,
 372                                                               false);
 373                                 sdata_unlock(sdata);
 374                         }
 375                 }
 376                 flush_delayed_work(&sdata->dec_tailroom_needed_wk);
 377         }
 378         ieee80211_scan_cancel(local);
 379
 380         /* make sure any new ROC will consider local->in_reconfig */
 381         flush_delayed_work(&local->roc_work);
 382         flush_work(&local->hw_roc_done);
 383
 384         /* wait for all packet processing to be done */
 385         synchronize_net();
 386
 387         ret = ieee80211_reconfig(local);
 388         wiphy_unlock(local->hw.wiphy);
 389
 390         if (ret)
 391                 cfg80211_shutdown_all_interfaces(local->hw.wiphy);
 392
 393         rtnl_unlock();
 394 }
 395
 396 void ieee80211_restart_hw(struct ieee80211_hw *hw)
 397 {
 398         struct ieee80211_local *local = hw_to_local(hw);
 399
 400         trace_api_restart_hw(local);
 401
 402         wiphy_info(hw->wiphy,
 403                    "Hardware restart was requested\n");
 404
 405         /* use this reason, ieee80211_reconfig will unblock it */
 406         ieee80211_stop_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP,
 407                                         IEEE80211_QUEUE_STOP_REASON_SUSPEND,
 408                                         false);
 409
 410         /*
 411          * Stop all Rx during the reconfig. We don't want state changes
 412          * or driver callbacks while this is in progress.
 413          */
 414         local->in_reconfig = true;
 415         barrier();
 416
 417         queue_work(system_freezable_wq, &local->restart_work);
 418 }
 419 EXPORT_SYMBOL(ieee80211_restart_hw);
 420
 421 #ifdef CONFIG_INET
 422 static int ieee80211_ifa_changed(struct notifier_block *nb,
 423                                  unsigned long data, void *arg)
 424 {
 425         struct in_ifaddr *ifa = arg;
 426         struct ieee80211_local *local =
 427                 container_of(nb, struct ieee80211_local,
 428                              ifa_notifier);
 429         struct net_device *ndev = ifa->ifa_dev->dev;
 430         struct wireless_dev *wdev = ndev->ieee80211_ptr;
 431         struct in_device *idev;
 432         struct ieee80211_sub_if_data *sdata;
 433         struct ieee80211_vif_cfg *vif_cfg;
 434         struct ieee80211_if_managed *ifmgd;
 435         int c = 0;
 436
 437         /* Make sure it's our interface that got changed */
 438         if (!wdev)
 439                 return NOTIFY_DONE;
 440
 441         if (wdev->wiphy != local->hw.wiphy)
 442                 return NOTIFY_DONE;
 443
 444         sdata = IEEE80211_DEV_TO_SUB_IF(ndev);
 445         vif_cfg = &sdata->vif.cfg;
 446
 447         /* ARP filtering is only supported in managed mode */
 448         if (sdata->vif.type != NL80211_IFTYPE_STATION)
 449                 return NOTIFY_DONE;
 450
 451         idev = __in_dev_get_rtnl(sdata->dev);
 452         if (!idev)
 453                 return NOTIFY_DONE;
 454
 455         ifmgd = &sdata->u.mgd;
 456         sdata_lock(sdata);
 457
 458         /* Copy the addresses to the vif config list */
 459         ifa = rtnl_dereference(idev->ifa_list);
 460         while (ifa) {
 461                 if (c < IEEE80211_BSS_ARP_ADDR_LIST_LEN)
 462                         vif_cfg->arp_addr_list[c] = ifa->ifa_address;
 463                 ifa = rtnl_dereference(ifa->ifa_next);
 464                 c++;
 465         }
 466
 467         vif_cfg->arp_addr_cnt = c;
 468
 469         /* Configure driver only if associated (which also implies it is up) */
 470         if (ifmgd->associated)
 471                 ieee80211_vif_cfg_change_notify(sdata, BSS_CHANGED_ARP_FILTER);
 472
 473         sdata_unlock(sdata);
 474
 475         return NOTIFY_OK;
 476 }
 477 #endif
 478
 479 #if IS_ENABLED(CONFIG_IPV6)
 480 static int ieee80211_ifa6_changed(struct notifier_block *nb,
 481                                   unsigned long data, void *arg)
 482 {
 483         struct inet6_ifaddr *ifa = (struct inet6_ifaddr *)arg;
 484         struct inet6_dev *idev = ifa->idev;
 485         struct net_device *ndev = ifa->idev->dev;
 486         struct ieee80211_local *local =
 487                 container_of(nb, struct ieee80211_local, ifa6_notifier);
 488         struct wireless_dev *wdev = ndev->ieee80211_ptr;
 489         struct ieee80211_sub_if_data *sdata;
 490
 491         /* Make sure it's our interface that got changed */
 492         if (!wdev || wdev->wiphy != local->hw.wiphy)
 493                 return NOTIFY_DONE;
 494
 495         sdata = IEEE80211_DEV_TO_SUB_IF(ndev);
 496
 497         /*
 498          * For now only support station mode. This is mostly because
 499          * doing AP would have to handle AP_VLAN in some way ...
 500          */
 501         if (sdata->vif.type != NL80211_IFTYPE_STATION)
 502                 return NOTIFY_DONE;
 503
 504         drv_ipv6_addr_change(local, sdata, idev);
 505
 506         return NOTIFY_OK;
 507 }
 508 #endif
 509
 510 /* There isn't a lot of sense in it, but you can transmit anything you like */
 511 static const struct ieee80211_txrx_stypes
 512 ieee80211_default_mgmt_stypes[NUM_NL80211_IFTYPES] = {
 513         [NL80211_IFTYPE_ADHOC] = {
 514                 .tx = 0xffff,
 515                 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
 516                         BIT(IEEE80211_STYPE_AUTH >> 4) |
 517                         BIT(IEEE80211_STYPE_DEAUTH >> 4) |
 518                         BIT(IEEE80211_STYPE_PROBE_REQ >> 4),
 519         },
 520         [NL80211_IFTYPE_STATION] = {
 521                 .tx = 0xffff,
 522                 /*
 523                  * To support Pre Association Security Negotiation (PASN) while
 524                  * already associated to one AP, allow user space to register to
 525                  * Rx authentication frames, so that the user space logic would
 526                  * be able to receive/handle authentication frames from a
 527                  * different AP as part of PASN.
 528                  * It is expected that user space would intelligently register
 529                  * for Rx authentication frames, i.e., only when PASN is used
 530                  * and configure a match filter only for PASN authentication
 531                  * algorithm, as otherwise the MLME functionality of mac80211
 532                  * would be broken.
 533                  */
 534                 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
 535                         BIT(IEEE80211_STYPE_AUTH >> 4) |
 536                         BIT(IEEE80211_STYPE_PROBE_REQ >> 4),
 537         },
 538         [NL80211_IFTYPE_AP] = {
 539                 .tx = 0xffff,
 540                 .rx = BIT(IEEE80211_STYPE_ASSOC_REQ >> 4) |
 541                         BIT(IEEE80211_STYPE_REASSOC_REQ >> 4) |
 542                         BIT(IEEE80211_STYPE_PROBE_REQ >> 4) |
 543                         BIT(IEEE80211_STYPE_DISASSOC >> 4) |
 544                         BIT(IEEE80211_STYPE_AUTH >> 4) |
 545                         BIT(IEEE80211_STYPE_DEAUTH >> 4) |
 546                         BIT(IEEE80211_STYPE_ACTION >> 4),
 547         },
 548         [NL80211_IFTYPE_AP_VLAN] = {
 549                 /* copy AP */
 550                 .tx = 0xffff,
 551                 .rx = BIT(IEEE80211_STYPE_ASSOC_REQ >> 4) |
 552                         BIT(IEEE80211_STYPE_REASSOC_REQ >> 4) |
 553                         BIT(IEEE80211_STYPE_PROBE_REQ >> 4) |
 554                         BIT(IEEE80211_STYPE_DISASSOC >> 4) |
 555                         BIT(IEEE80211_STYPE_AUTH >> 4) |
 556                         BIT(IEEE80211_STYPE_DEAUTH >> 4) |
 557                         BIT(IEEE80211_STYPE_ACTION >> 4),
 558         },
 559         [NL80211_IFTYPE_P2P_CLIENT] = {
 560                 .tx = 0xffff,
 561                 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
 562                         BIT(IEEE80211_STYPE_PROBE_REQ >> 4),
 563         },
 564         [NL80211_IFTYPE_P2P_GO] = {
 565                 .tx = 0xffff,
 566                 .rx = BIT(IEEE80211_STYPE_ASSOC_REQ >> 4) |
 567                         BIT(IEEE80211_STYPE_REASSOC_REQ >> 4) |
 568                         BIT(IEEE80211_STYPE_PROBE_REQ >> 4) |
 569                         BIT(IEEE80211_STYPE_DISASSOC >> 4) |
 570                         BIT(IEEE80211_STYPE_AUTH >> 4) |
 571                         BIT(IEEE80211_STYPE_DEAUTH >> 4) |
 572                         BIT(IEEE80211_STYPE_ACTION >> 4),
 573         },
 574         [NL80211_IFTYPE_MESH_POINT] = {
 575                 .tx = 0xffff,
 576                 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
 577                         BIT(IEEE80211_STYPE_AUTH >> 4) |
 578                         BIT(IEEE80211_STYPE_DEAUTH >> 4),
 579         },
 580         [NL80211_IFTYPE_P2P_DEVICE] = {
 581                 .tx = 0xffff,
 582                 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
 583                         BIT(IEEE80211_STYPE_PROBE_REQ >> 4),
 584         },
 585 };
 586
 587 static const struct ieee80211_ht_cap mac80211_ht_capa_mod_mask = {
 588         .ampdu_params_info = IEEE80211_HT_AMPDU_PARM_FACTOR |
 589                              IEEE80211_HT_AMPDU_PARM_DENSITY,
 590
 591         .cap_info = cpu_to_le16(IEEE80211_HT_CAP_SUP_WIDTH_20_40 |
 592                                 IEEE80211_HT_CAP_MAX_AMSDU |
 593                                 IEEE80211_HT_CAP_SGI_20 |
 594                                 IEEE80211_HT_CAP_SGI_40 |
 595                                 IEEE80211_HT_CAP_TX_STBC |
 596                                 IEEE80211_HT_CAP_RX_STBC |
 597                                 IEEE80211_HT_CAP_LDPC_CODING |
 598                                 IEEE80211_HT_CAP_40MHZ_INTOLERANT),
 599         .mcs = {
 600                 .rx_mask = { 0xff, 0xff, 0xff, 0xff, 0xff,
 601                              0xff, 0xff, 0xff, 0xff, 0xff, },
 602         },
 603 };
 604
 605 static const struct ieee80211_vht_cap mac80211_vht_capa_mod_mask = {
 606         .vht_cap_info =
 607                 cpu_to_le32(IEEE80211_VHT_CAP_RXLDPC |
 608                             IEEE80211_VHT_CAP_SHORT_GI_80 |
 609                             IEEE80211_VHT_CAP_SHORT_GI_160 |
 610                             IEEE80211_VHT_CAP_RXSTBC_MASK |
 611                             IEEE80211_VHT_CAP_TXSTBC |
 612                             IEEE80211_VHT_CAP_SU_BEAMFORMER_CAPABLE |
 613                             IEEE80211_VHT_CAP_SU_BEAMFORMEE_CAPABLE |
 614                             IEEE80211_VHT_CAP_TX_ANTENNA_PATTERN |
 615                             IEEE80211_VHT_CAP_RX_ANTENNA_PATTERN |
 616                             IEEE80211_VHT_CAP_MAX_A_MPDU_LENGTH_EXPONENT_MASK),
 617         .supp_mcs = {
 618                 .rx_mcs_map = cpu_to_le16(~0),
 619                 .tx_mcs_map = cpu_to_le16(~0),
 620         },
 621 };
 622
 623 struct ieee80211_hw *ieee80211_alloc_hw_nm(size_t priv_data_len,
 624                                            const struct ieee80211_ops *ops,
 625                                            const char *requested_name)
 626 {
 627         struct ieee80211_local *local;
 628         int priv_size, i;
 629         struct wiphy *wiphy;
 630         bool use_chanctx;
 631
 632         if (WARN_ON(!ops->tx || !ops->start || !ops->stop || !ops->config ||
 633                     !ops->add_interface || !ops->remove_interface ||
 634                     !ops->configure_filter || !ops->wake_tx_queue))
 635                 return NULL;
 636
 637         if (WARN_ON(ops->sta_state && (ops->sta_add || ops->sta_remove)))
 638                 return NULL;
 639
 640         if (WARN_ON(!!ops->link_info_changed != !!ops->vif_cfg_changed ||
 641                     (ops->link_info_changed && ops->bss_info_changed)))
 642                 return NULL;
 643
 644         /* check all or no channel context operations exist */
 645         i = !!ops->add_chanctx + !!ops->remove_chanctx +
 646             !!ops->change_chanctx + !!ops->assign_vif_chanctx +
 647             !!ops->unassign_vif_chanctx;
 648         if (WARN_ON(i != 0 && i != 5))
 649                 return NULL;
 650         use_chanctx = i == 5;
 651
 652         /* Ensure 32-byte alignment of our private data and hw private data.
 653          * We use the wiphy priv data for both our ieee80211_local and for
 654          * the driver's private data
 655          *
 656          * In memory it'll be like this:
 657          *
 658          * +-------------------------+
 659          * | struct wiphy           |
 660          * +-------------------------+
 661          * | struct ieee80211_local  |
 662          * +-------------------------+
 663          * | driver's private data   |
 664          * +-------------------------+
 665          *
 666          */
 667         priv_size = ALIGN(sizeof(*local), NETDEV_ALIGN) + priv_data_len;
 668
 669         wiphy = wiphy_new_nm(&mac80211_config_ops, priv_size, requested_name);
 670
 671         if (!wiphy)
 672                 return NULL;
 673
 674         wiphy->mgmt_stypes = ieee80211_default_mgmt_stypes;
 675
 676         wiphy->privid = mac80211_wiphy_privid;
 677
 678         wiphy->flags |= WIPHY_FLAG_NETNS_OK |
 679                         WIPHY_FLAG_4ADDR_AP |
 680                         WIPHY_FLAG_4ADDR_STATION |
 681                         WIPHY_FLAG_REPORTS_OBSS |
 682                         WIPHY_FLAG_OFFCHAN_TX;
 683
 684         if (!use_chanctx || ops->remain_on_channel)
 685                 wiphy->flags |= WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL;
 686
 687         wiphy->features |= NL80211_FEATURE_SK_TX_STATUS |
 688                            NL80211_FEATURE_SAE |
 689                            NL80211_FEATURE_HT_IBSS |
 690                            NL80211_FEATURE_VIF_TXPOWER |
 691                            NL80211_FEATURE_MAC_ON_CREATE |
 692                            NL80211_FEATURE_USERSPACE_MPM |
 693                            NL80211_FEATURE_FULL_AP_CLIENT_STATE;
 694         wiphy_ext_feature_set(wiphy, NL80211_EXT_FEATURE_FILS_STA);
 695         wiphy_ext_feature_set(wiphy,
 696                               NL80211_EXT_FEATURE_CONTROL_PORT_OVER_NL80211);
 697         wiphy_ext_feature_set(wiphy,
 698                               NL80211_EXT_FEATURE_CONTROL_PORT_NO_PREAUTH);
 699         wiphy_ext_feature_set(wiphy,
 700                               NL80211_EXT_FEATURE_CONTROL_PORT_OVER_NL80211_TX_STATUS);
 701         wiphy_ext_feature_set(wiphy,
 702                               NL80211_EXT_FEATURE_SCAN_FREQ_KHZ);
 703         wiphy_ext_feature_set(wiphy,
 704                               NL80211_EXT_FEATURE_POWERED_ADDR_CHANGE);
 705
 706         if (!ops->hw_scan) {
 707                 wiphy->features |= NL80211_FEATURE_LOW_PRIORITY_SCAN |
 708                                    NL80211_FEATURE_AP_SCAN;
 709                 /*
 710                  * if the driver behaves correctly using the probe request
 711                  * (template) from mac80211, then both of these should be
 712                  * supported even with hw scan - but let drivers opt in.
 713                  */
 714                 wiphy_ext_feature_set(wiphy,
 715                                       NL80211_EXT_FEATURE_SCAN_RANDOM_SN);
 716                 wiphy_ext_feature_set(wiphy,
 717                                       NL80211_EXT_FEATURE_SCAN_MIN_PREQ_CONTENT);
 718         }
 719
 720         if (!ops->set_key)
 721                 wiphy->flags |= WIPHY_FLAG_IBSS_RSN;
 722
 723         wiphy_ext_feature_set(wiphy, NL80211_EXT_FEATURE_TXQS);
 724         wiphy_ext_feature_set(wiphy, NL80211_EXT_FEATURE_RRM);
 725
 726         wiphy->bss_priv_size = sizeof(struct ieee80211_bss);
 727
 728         local = wiphy_priv(wiphy);
 729
 730         if (sta_info_init(local))
 731                 goto err_free;
 732
 733         local->hw.wiphy = wiphy;
 734
 735         local->hw.priv = (char *)local + ALIGN(sizeof(*local), NETDEV_ALIGN);
 736
 737         local->ops = ops;
 738         local->use_chanctx = use_chanctx;
 739
 740         /*
 741          * We need a bit of data queued to build aggregates properly, so
 742          * instruct the TCP stack to allow more than a single ms of data
 743          * to be queued in the stack. The value is a bit-shift of 1
 744          * second, so 7 is ~8ms of queued data. Only affects local TCP
 745          * sockets.
 746          * This is the default, anyhow - drivers may need to override it
 747          * for local reasons (longer buffers, longer completion time, or
 748          * similar).
 749          */
 750         local->hw.tx_sk_pacing_shift = 7;
 751
 752         /* set up some defaults */
 753         local->hw.queues = 1;
 754         local->hw.max_rates = 1;
 755         local->hw.max_report_rates = 0;
 756         local->hw.max_rx_aggregation_subframes = IEEE80211_MAX_AMPDU_BUF_HT;
 757         local->hw.max_tx_aggregation_subframes = IEEE80211_MAX_AMPDU_BUF_HT;
 758         local->hw.offchannel_tx_hw_queue = IEEE80211_INVAL_HW_QUEUE;
 759         local->hw.conf.long_frame_max_tx_count = wiphy->retry_long;
 760         local->hw.conf.short_frame_max_tx_count = wiphy->retry_short;
 761         local->hw.radiotap_mcs_details = IEEE80211_RADIOTAP_MCS_HAVE_MCS |
 762                                          IEEE80211_RADIOTAP_MCS_HAVE_GI |
 763                                          IEEE80211_RADIOTAP_MCS_HAVE_BW;
 764         local->hw.radiotap_vht_details = IEEE80211_RADIOTAP_VHT_KNOWN_GI |
 765                                          IEEE80211_RADIOTAP_VHT_KNOWN_BANDWIDTH;
 766         local->hw.uapsd_queues = IEEE80211_DEFAULT_UAPSD_QUEUES;
 767         local->hw.uapsd_max_sp_len = IEEE80211_DEFAULT_MAX_SP_LEN;
 768         local->hw.max_mtu = IEEE80211_MAX_DATA_LEN;
 769         local->user_power_level = IEEE80211_UNSET_POWER_LEVEL;
 770         wiphy->ht_capa_mod_mask = &mac80211_ht_capa_mod_mask;
 771         wiphy->vht_capa_mod_mask = &mac80211_vht_capa_mod_mask;
 772
 773         local->ext_capa[7] = WLAN_EXT_CAPA8_OPMODE_NOTIF;
 774
 775         wiphy->extended_capabilities = local->ext_capa;
 776         wiphy->extended_capabilities_mask = local->ext_capa;
 777         wiphy->extended_capabilities_len =
 778                 ARRAY_SIZE(local->ext_capa);
 779
 780         INIT_LIST_HEAD(&local->interfaces);
 781         INIT_LIST_HEAD(&local->mon_list);
 782
 783         __hw_addr_init(&local->mc_list);
 784
 785         mutex_init(&local->iflist_mtx);
 786         mutex_init(&local->mtx);
 787
 788         mutex_init(&local->key_mtx);
 789         spin_lock_init(&local->filter_lock);
 790         spin_lock_init(&local->rx_path_lock);
 791         spin_lock_init(&local->queue_stop_reason_lock);
 792
 793         for (i = 0; i < IEEE80211_NUM_ACS; i++) {
 794                 INIT_LIST_HEAD(&local->active_txqs[i]);
 795                 spin_lock_init(&local->active_txq_lock[i]);
 796                 local->aql_txq_limit_low[i] = IEEE80211_DEFAULT_AQL_TXQ_LIMIT_L;
 797                 local->aql_txq_limit_high[i] =
 798                         IEEE80211_DEFAULT_AQL_TXQ_LIMIT_H;
 799                 atomic_set(&local->aql_ac_pending_airtime[i], 0);
 800         }
 801
 802         local->airtime_flags = AIRTIME_USE_TX | AIRTIME_USE_RX;
 803         local->aql_threshold = IEEE80211_AQL_THRESHOLD;
 804         atomic_set(&local->aql_total_pending_airtime, 0);
 805
 806         spin_lock_init(&local->handle_wake_tx_queue_lock);
 807
 808         INIT_LIST_HEAD(&local->chanctx_list);
 809         mutex_init(&local->chanctx_mtx);
 810
 811         INIT_DELAYED_WORK(&local->scan_work, ieee80211_scan_work);
 812
 813         INIT_WORK(&local->restart_work, ieee80211_restart_work);
 814
 815         INIT_WORK(&local->radar_detected_work,
 816                   ieee80211_dfs_radar_detected_work);
 817
 818         INIT_WORK(&local->reconfig_filter, ieee80211_reconfig_filter);
 819         local->smps_mode = IEEE80211_SMPS_OFF;
 820
 821         INIT_WORK(&local->dynamic_ps_enable_work,
 822                   ieee80211_dynamic_ps_enable_work);
 823         INIT_WORK(&local->dynamic_ps_disable_work,
 824                   ieee80211_dynamic_ps_disable_work);
 825         timer_setup(&local->dynamic_ps_timer, ieee80211_dynamic_ps_timer, 0);
 826
 827         INIT_WORK(&local->sched_scan_stopped_work,
 828                   ieee80211_sched_scan_stopped_work);
 829
 830         spin_lock_init(&local->ack_status_lock);
 831         idr_init(&local->ack_status_frames);
 832
 833         for (i = 0; i < IEEE80211_MAX_QUEUES; i++) {
 834                 skb_queue_head_init(&local->pending[i]);
 835                 atomic_set(&local->agg_queue_stop[i], 0);
 836         }
 837         tasklet_setup(&local->tx_pending_tasklet, ieee80211_tx_pending);
 838         tasklet_setup(&local->wake_txqs_tasklet, ieee80211_wake_txqs);
 839         tasklet_setup(&local->tasklet, ieee80211_tasklet_handler);
 840
 841         skb_queue_head_init(&local->skb_queue);
 842         skb_queue_head_init(&local->skb_queue_unreliable);
 843
 844         ieee80211_alloc_led_names(local);
 845
 846         ieee80211_roc_setup(local);
 847
 848         local->hw.radiotap_timestamp.units_pos = -1;
 849         local->hw.radiotap_timestamp.accuracy = -1;
 850
 851         return &local->hw;
 852  err_free:
 853         wiphy_free(wiphy);
 854         return NULL;
 855 }
 856 EXPORT_SYMBOL(ieee80211_alloc_hw_nm);
 857
 858 static int ieee80211_init_cipher_suites(struct ieee80211_local *local)
 859 {
 860         bool have_wep = !fips_enabled; /* FIPS does not permit the use of RC4 */
 861         bool have_mfp = ieee80211_hw_check(&local->hw, MFP_CAPABLE);
 862         int r = 0, w = 0;
 863         u32 *suites;
 864         static const u32 cipher_suites[] = {
 865                 /* keep WEP first, it may be removed below */
 866                 WLAN_CIPHER_SUITE_WEP40,
 867                 WLAN_CIPHER_SUITE_WEP104,
 868                 WLAN_CIPHER_SUITE_TKIP,
 869                 WLAN_CIPHER_SUITE_CCMP,
 870                 WLAN_CIPHER_SUITE_CCMP_256,
 871                 WLAN_CIPHER_SUITE_GCMP,
 872                 WLAN_CIPHER_SUITE_GCMP_256,
 873
 874                 /* keep last -- depends on hw flags! */
 875                 WLAN_CIPHER_SUITE_AES_CMAC,
 876                 WLAN_CIPHER_SUITE_BIP_CMAC_256,
 877                 WLAN_CIPHER_SUITE_BIP_GMAC_128,
 878                 WLAN_CIPHER_SUITE_BIP_GMAC_256,
 879         };
 880
 881         if (ieee80211_hw_check(&local->hw, SW_CRYPTO_CONTROL) ||
 882             local->hw.wiphy->cipher_suites) {
 883                 /* If the driver advertises, or doesn't support SW crypto,
 884                  * we only need to remove WEP if necessary.
 885                  */
 886                 if (have_wep)
 887                         return 0;
 888
 889                 /* well if it has _no_ ciphers ... fine */
 890                 if (!local->hw.wiphy->n_cipher_suites)
 891                         return 0;
 892
 893                 /* Driver provides cipher suites, but we need to exclude WEP */
 894                 suites = kmemdup(local->hw.wiphy->cipher_suites,
 895                                  sizeof(u32) * local->hw.wiphy->n_cipher_suites,
 896                                  GFP_KERNEL);
 897                 if (!suites)
 898                         return -ENOMEM;
 899
 900                 for (r = 0; r < local->hw.wiphy->n_cipher_suites; r++) {
 901                         u32 suite = local->hw.wiphy->cipher_suites[r];
 902
 903                         if (suite == WLAN_CIPHER_SUITE_WEP40 ||
 904                             suite == WLAN_CIPHER_SUITE_WEP104)
 905                                 continue;
 906                         suites[w++] = suite;
 907                 }
 908         } else {
 909                 /* assign the (software supported and perhaps offloaded)
 910                  * cipher suites
 911                  */
 912                 local->hw.wiphy->cipher_suites = cipher_suites;
 913                 local->hw.wiphy->n_cipher_suites = ARRAY_SIZE(cipher_suites);
 914
 915                 if (!have_mfp)
 916                         local->hw.wiphy->n_cipher_suites -= 4;
 917
 918                 if (!have_wep) {
 919                         local->hw.wiphy->cipher_suites += 2;
 920                         local->hw.wiphy->n_cipher_suites -= 2;
 921                 }
 922
 923                 /* not dynamically allocated, so just return */
 924                 return 0;
 925         }
 926
 927         local->hw.wiphy->cipher_suites = suites;
 928         local->hw.wiphy->n_cipher_suites = w;
 929         local->wiphy_ciphers_allocated = true;
 930
 931         return 0;
 932 }
 933
 934 int ieee80211_register_hw(struct ieee80211_hw *hw)
 935 {
 936         struct ieee80211_local *local = hw_to_local(hw);
 937         int result, i;
 938         enum nl80211_band band;
 939         int channels, max_bitrates;
 940         bool supp_ht, supp_vht, supp_he, supp_eht;
 941         struct cfg80211_chan_def dflt_chandef = {};
 942
 943         if (ieee80211_hw_check(hw, QUEUE_CONTROL) &&
 944             (local->hw.offchannel_tx_hw_queue == IEEE80211_INVAL_HW_QUEUE ||
 945              local->hw.offchannel_tx_hw_queue >= local->hw.queues))
 946                 return -EINVAL;
 947
 948         if ((hw->wiphy->features & NL80211_FEATURE_TDLS_CHANNEL_SWITCH) &&
 949             (!local->ops->tdls_channel_switch ||
 950              !local->ops->tdls_cancel_channel_switch ||
 951              !local->ops->tdls_recv_channel_switch))
 952                 return -EOPNOTSUPP;
 953
 954         if (WARN_ON(ieee80211_hw_check(hw, SUPPORTS_TX_FRAG) &&
 955                     !local->ops->set_frag_threshold))
 956                 return -EINVAL;
 957
 958         if (WARN_ON(local->hw.wiphy->interface_modes &
 959                         BIT(NL80211_IFTYPE_NAN) &&
 960                     (!local->ops->start_nan || !local->ops->stop_nan)))
 961                 return -EINVAL;
 962
 963         if (hw->wiphy->flags & WIPHY_FLAG_SUPPORTS_MLO) {
 964                 /*
 965                  * For drivers capable of doing MLO, assume modern driver
 966                  * or firmware facilities, so software doesn't have to do
 967                  * as much, e.g. monitoring beacons would be hard if we
 968                  * might not even know which link is active at which time.
 969                  */
 970                 if (WARN_ON(!local->use_chanctx))
 971                         return -EINVAL;
 972
 973                 if (WARN_ON(!local->ops->link_info_changed))
 974                         return -EINVAL;
 975
 976                 if (WARN_ON(!ieee80211_hw_check(hw, HAS_RATE_CONTROL)))
 977                         return -EINVAL;
 978
 979                 if (WARN_ON(!ieee80211_hw_check(hw, AMPDU_AGGREGATION)))
 980                         return -EINVAL;
 981
 982                 if (WARN_ON(ieee80211_hw_check(hw, HOST_BROADCAST_PS_BUFFERING)))
 983                         return -EINVAL;
 984
 985                 if (WARN_ON(ieee80211_hw_check(hw, SUPPORTS_PS) &&
 986                             (!ieee80211_hw_check(hw, SUPPORTS_DYNAMIC_PS) ||
 987                              ieee80211_hw_check(hw, PS_NULLFUNC_STACK))))
 988                         return -EINVAL;
 989
 990                 if (WARN_ON(!ieee80211_hw_check(hw, MFP_CAPABLE)))
 991                         return -EINVAL;
 992
 993                 if (WARN_ON(!ieee80211_hw_check(hw, CONNECTION_MONITOR)))
 994                         return -EINVAL;
 995
 996                 if (WARN_ON(ieee80211_hw_check(hw, NEED_DTIM_BEFORE_ASSOC)))
 997                         return -EINVAL;
 998
 999                 if (WARN_ON(ieee80211_hw_check(hw, TIMING_BEACON_ONLY)))
1000                         return -EINVAL;
1001
1002                 if (WARN_ON(!ieee80211_hw_check(hw, AP_LINK_PS)))
1003                         return -EINVAL;
1004
1005                 if (WARN_ON(ieee80211_hw_check(hw, DEAUTH_NEED_MGD_TX_PREP)))
1006                         return -EINVAL;
1007         }
1008
1009 #ifdef CONFIG_PM
1010         if (hw->wiphy->wowlan && (!local->ops->suspend || !local->ops->resume))
1011                 return -EINVAL;
1012 #endif
1013
1014         if (!local->use_chanctx) {
1015                 for (i = 0; i < local->hw.wiphy->n_iface_combinations; i++) {
1016                         const struct ieee80211_iface_combination *comb;
1017
1018                         comb = &local->hw.wiphy->iface_combinations[i];
1019
1020                         if (comb->num_different_channels > 1)
1021                                 return -EINVAL;
1022                 }
1023         } else {
1024                 /* DFS is not supported with multi-channel combinations yet */
1025                 for (i = 0; i < local->hw.wiphy->n_iface_combinations; i++) {
1026                         const struct ieee80211_iface_combination *comb;
1027
1028                         comb = &local->hw.wiphy->iface_combinations[i];
1029
1030                         if (comb->radar_detect_widths &&
1031                             comb->num_different_channels > 1)
1032                                 return -EINVAL;
1033                 }
1034         }
1035
1036         /* Only HW csum features are currently compatible with mac80211 */
1037         if (WARN_ON(hw->netdev_features & ~MAC80211_SUPPORTED_FEATURES))
1038                 return -EINVAL;
1039
1040         if (hw->max_report_rates == 0)
1041                 hw->max_report_rates = hw->max_rates;
1042
1043         local->rx_chains = 1;
1044
1045         /*
1046          * generic code guarantees at least one band,
1047          * set this very early because much code assumes
1048          * that hw.conf.channel is assigned
1049          */
1050         channels = 0;
1051         max_bitrates = 0;
1052         supp_ht = false;
1053         supp_vht = false;
1054         supp_he = false;
1055         supp_eht = false;
1056         for (band = 0; band < NUM_NL80211_BANDS; band++) {
1057                 struct ieee80211_supported_band *sband;
1058
1059                 sband = local->hw.wiphy->bands[band];
1060                 if (!sband)
1061                         continue;
1062
1063                 if (!dflt_chandef.chan) {
1064                         /*
1065                          * Assign the first enabled channel to dflt_chandef
1066                          * from the list of channels
1067                          */
1068                         for (i = 0; i < sband->n_channels; i++)
1069                                 if (!(sband->channels[i].flags &
1070                                                 IEEE80211_CHAN_DISABLED))
1071                                         break;
1072                         /* if none found then use the first anyway */
1073                         if (i == sband->n_channels)
1074                                 i = 0;
1075                         cfg80211_chandef_create(&dflt_chandef,
1076                                                 &sband->channels[i],
1077                                                 NL80211_CHAN_NO_HT);
1078                         /* init channel we're on */
1079                         if (!local->use_chanctx && !local->_oper_chandef.chan) {
1080                                 local->hw.conf.chandef = dflt_chandef;
1081                                 local->_oper_chandef = dflt_chandef;
1082                         }
1083                         local->monitor_chandef = dflt_chandef;
1084                 }
1085
1086                 channels += sband->n_channels;
1087
1088                 /*
1089                  * Due to the way the aggregation code handles this and it
1090                  * being an HT capability, we can't really support delayed
1091                  * BA in MLO (yet).
1092                  */
1093                 if (WARN_ON(sband->ht_cap.ht_supported &&
1094                             (sband->ht_cap.cap & IEEE80211_HT_CAP_DELAY_BA) &&
1095                             hw->wiphy->flags & WIPHY_FLAG_SUPPORTS_MLO))
1096                         return -EINVAL;
1097
1098                 if (max_bitrates < sband->n_bitrates)
1099                         max_bitrates = sband->n_bitrates;
1100                 supp_ht = supp_ht || sband->ht_cap.ht_supported;
1101                 supp_vht = supp_vht || sband->vht_cap.vht_supported;
1102
1103                 for (i = 0; i < sband->n_iftype_data; i++) {
1104                         const struct ieee80211_sband_iftype_data *iftd;
1105
1106                         iftd = &sband->iftype_data[i];
1107
1108                         supp_he = supp_he || iftd->he_cap.has_he;
1109                         supp_eht = supp_eht || iftd->eht_cap.has_eht;
1110                 }
1111
1112                 /* HT, VHT, HE require QoS, thus >= 4 queues */
1113                 if (WARN_ON(local->hw.queues < IEEE80211_NUM_ACS &&
1114                             (supp_ht || supp_vht || supp_he)))
1115                         return -EINVAL;
1116
1117                 /* EHT requires HE support */
1118                 if (WARN_ON(supp_eht && !supp_he))
1119                         return -EINVAL;
1120
1121                 if (!sband->ht_cap.ht_supported)
1122                         continue;
1123
1124                 /* TODO: consider VHT for RX chains, hopefully it's the same */
1125                 local->rx_chains =
1126                         max(ieee80211_mcs_to_chains(&sband->ht_cap.mcs),
1127                             local->rx_chains);
1128
1129                 /* no need to mask, SM_PS_DISABLED has all bits set */
1130                 sband->ht_cap.cap |= WLAN_HT_CAP_SM_PS_DISABLED <<
1131                                      IEEE80211_HT_CAP_SM_PS_SHIFT;
1132         }
1133
1134         /* if low-level driver supports AP, we also support VLAN.
1135          * drivers advertising SW_CRYPTO_CONTROL should enable AP_VLAN
1136          * based on their support to transmit SW encrypted packets.
1137          */
1138         if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_AP) &&
1139             !ieee80211_hw_check(&local->hw, SW_CRYPTO_CONTROL)) {
1140                 hw->wiphy->interface_modes |= BIT(NL80211_IFTYPE_AP_VLAN);
1141                 hw->wiphy->software_iftypes |= BIT(NL80211_IFTYPE_AP_VLAN);
1142         }
1143
1144         /* mac80211 always supports monitor */
1145         hw->wiphy->interface_modes |= BIT(NL80211_IFTYPE_MONITOR);
1146         hw->wiphy->software_iftypes |= BIT(NL80211_IFTYPE_MONITOR);
1147
1148         /* mac80211 doesn't support more than one IBSS interface right now */
1149         for (i = 0; i < hw->wiphy->n_iface_combinations; i++) {
1150                 const struct ieee80211_iface_combination *c;
1151                 int j;
1152
1153                 c = &hw->wiphy->iface_combinations[i];
1154
1155                 for (j = 0; j < c->n_limits; j++)
1156                         if ((c->limits[j].types & BIT(NL80211_IFTYPE_ADHOC)) &&
1157                             c->limits[j].max > 1)
1158                                 return -EINVAL;
1159         }
1160
1161         local->int_scan_req = kzalloc(sizeof(*local->int_scan_req) +
1162                                       sizeof(void *) * channels, GFP_KERNEL);
1163         if (!local->int_scan_req)
1164                 return -ENOMEM;
1165
1166         eth_broadcast_addr(local->int_scan_req->bssid);
1167
1168         for (band = 0; band < NUM_NL80211_BANDS; band++) {
1169                 if (!local->hw.wiphy->bands[band])
1170                         continue;
1171                 local->int_scan_req->rates[band] = (u32) -1;
1172         }
1173
1174 #ifndef CONFIG_MAC80211_MESH
1175         /* mesh depends on Kconfig, but drivers should set it if they want */
1176         local->hw.wiphy->interface_modes &= ~BIT(NL80211_IFTYPE_MESH_POINT);
1177 #endif
1178
1179         /* if the underlying driver supports mesh, mac80211 will (at least)
1180          * provide routing of mesh authentication frames to userspace */
1181         if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_MESH_POINT))
1182                 local->hw.wiphy->flags |= WIPHY_FLAG_MESH_AUTH;
1183
1184         /* mac80211 supports control port protocol changing */
1185         local->hw.wiphy->flags |= WIPHY_FLAG_CONTROL_PORT_PROTOCOL;
1186
1187         if (ieee80211_hw_check(&local->hw, SIGNAL_DBM)) {
1188                 local->hw.wiphy->signal_type = CFG80211_SIGNAL_TYPE_MBM;
1189         } else if (ieee80211_hw_check(&local->hw, SIGNAL_UNSPEC)) {
1190                 local->hw.wiphy->signal_type = CFG80211_SIGNAL_TYPE_UNSPEC;
1191                 if (hw->max_signal <= 0) {
1192                         result = -EINVAL;
1193                         goto fail_workqueue;
1194                 }
1195         }
1196
1197         /* Mac80211 and therefore all drivers using SW crypto only
1198          * are able to handle PTK rekeys and Extended Key ID.
1199          */
1200         if (!local->ops->set_key) {
1201                 wiphy_ext_feature_set(local->hw.wiphy,
1202                                       NL80211_EXT_FEATURE_CAN_REPLACE_PTK0);
1203                 wiphy_ext_feature_set(local->hw.wiphy,
1204                                       NL80211_EXT_FEATURE_EXT_KEY_ID);
1205         }
1206
1207         if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_ADHOC))
1208                 wiphy_ext_feature_set(local->hw.wiphy,
1209                                       NL80211_EXT_FEATURE_DEL_IBSS_STA);
1210
1211         /*
1212          * Calculate scan IE length -- we need this to alloc
1213          * memory and to subtract from the driver limit. It
1214          * includes the DS Params, (extended) supported rates, and HT
1215          * information -- SSID is the driver's responsibility.
1216          */
1217         local->scan_ies_len = 4 + max_bitrates /* (ext) supp rates */ +
1218                 3 /* DS Params */;
1219         if (supp_ht)
1220                 local->scan_ies_len += 2 + sizeof(struct ieee80211_ht_cap);
1221
1222         if (supp_vht)
1223                 local->scan_ies_len +=
1224                         2 + sizeof(struct ieee80211_vht_cap);
1225
1226         /*
1227          * HE cap element is variable in size - set len to allow max size */
1228         if (supp_he) {
1229                 local->scan_ies_len +=
1230                         3 + sizeof(struct ieee80211_he_cap_elem) +
1231                         sizeof(struct ieee80211_he_mcs_nss_supp) +
1232                         IEEE80211_HE_PPE_THRES_MAX_LEN;
1233
1234                 if (supp_eht)
1235                         local->scan_ies_len +=
1236                                 3 + sizeof(struct ieee80211_eht_cap_elem) +
1237                                 sizeof(struct ieee80211_eht_mcs_nss_supp) +
1238                                 IEEE80211_EHT_PPE_THRES_MAX_LEN;
1239         }
1240
1241         if (!local->ops->hw_scan) {
1242                 /* For hw_scan, driver needs to set these up. */
1243                 local->hw.wiphy->max_scan_ssids = 4;
1244                 local->hw.wiphy->max_scan_ie_len = IEEE80211_MAX_DATA_LEN;
1245         }
1246
1247         /*
1248          * If the driver supports any scan IEs, then assume the
1249          * limit includes the IEs mac80211 will add, otherwise
1250          * leave it at zero and let the driver sort it out; we
1251          * still pass our IEs to the driver but userspace will
1252          * not be allowed to in that case.
1253          */
1254         if (local->hw.wiphy->max_scan_ie_len)
1255                 local->hw.wiphy->max_scan_ie_len -= local->scan_ies_len;
1256
1257         result = ieee80211_init_cipher_suites(local);
1258         if (result < 0)
1259                 goto fail_workqueue;
1260
1261         if (!local->ops->remain_on_channel)
1262                 local->hw.wiphy->max_remain_on_channel_duration = 5000;
1263
1264         /* mac80211 based drivers don't support internal TDLS setup */
1265         if (local->hw.wiphy->flags & WIPHY_FLAG_SUPPORTS_TDLS)
1266                 local->hw.wiphy->flags |= WIPHY_FLAG_TDLS_EXTERNAL_SETUP;
1267
1268         /* mac80211 supports eCSA, if the driver supports STA CSA at all */
1269         if (ieee80211_hw_check(&local->hw, CHANCTX_STA_CSA))
1270                 local->ext_capa[0] |= WLAN_EXT_CAPA1_EXT_CHANNEL_SWITCHING;
1271
1272         /* mac80211 supports multi BSSID, if the driver supports it */
1273         if (ieee80211_hw_check(&local->hw, SUPPORTS_MULTI_BSSID)) {
1274                 local->hw.wiphy->support_mbssid = true;
1275                 if (ieee80211_hw_check(&local->hw,
1276                                        SUPPORTS_ONLY_HE_MULTI_BSSID))
1277                         local->hw.wiphy->support_only_he_mbssid = true;
1278                 else
1279                         local->ext_capa[2] |=
1280                                 WLAN_EXT_CAPA3_MULTI_BSSID_SUPPORT;
1281         }
1282
1283         local->hw.wiphy->max_num_csa_counters = IEEE80211_MAX_CNTDWN_COUNTERS_NUM;
1284
1285         /*
1286          * We use the number of queues for feature tests (QoS, HT) internally
1287          * so restrict them appropriately.
1288          */
1289         if (hw->queues > IEEE80211_MAX_QUEUES)
1290                 hw->queues = IEEE80211_MAX_QUEUES;
1291
1292         local->workqueue =
1293                 alloc_ordered_workqueue("%s", 0, wiphy_name(local->hw.wiphy));
1294         if (!local->workqueue) {
1295                 result = -ENOMEM;
1296                 goto fail_workqueue;
1297         }
1298
1299         /*
1300          * The hardware needs headroom for sending the frame,
1301          * and we need some headroom for passing the frame to monitor
1302          * interfaces, but never both at the same time.
1303          */
1304         local->tx_headroom = max_t(unsigned int , local->hw.extra_tx_headroom,
1305                                    IEEE80211_TX_STATUS_HEADROOM);
1306
1307         /*
1308          * if the driver doesn't specify a max listen interval we
1309          * use 5 which should be a safe default
1310          */
1311         if (local->hw.max_listen_interval == 0)
1312                 local->hw.max_listen_interval = 5;
1313
1314         local->hw.conf.listen_interval = local->hw.max_listen_interval;
1315
1316         local->dynamic_ps_forced_timeout = -1;
1317
1318         if (!local->hw.max_nan_de_entries)
1319                 local->hw.max_nan_de_entries = IEEE80211_MAX_NAN_INSTANCE_ID;
1320
1321         if (!local->hw.weight_multiplier)
1322                 local->hw.weight_multiplier = 1;
1323
1324         ieee80211_wep_init(local);
1325
1326         local->hw.conf.flags = IEEE80211_CONF_IDLE;
1327
1328         ieee80211_led_init(local);
1329
1330         result = ieee80211_txq_setup_flows(local);
1331         if (result)
1332                 goto fail_flows;
1333
1334         rtnl_lock();
1335         result = ieee80211_init_rate_ctrl_alg(local,
1336                                               hw->rate_control_algorithm);
1337         rtnl_unlock();
1338         if (result < 0) {
1339                 wiphy_debug(local->hw.wiphy,
1340                             "Failed to initialize rate control algorithm\n");
1341                 goto fail_rate;
1342         }
1343
1344         if (local->rate_ctrl) {
1345                 clear_bit(IEEE80211_HW_SUPPORTS_VHT_EXT_NSS_BW, hw->flags);
1346                 if (local->rate_ctrl->ops->capa & RATE_CTRL_CAPA_VHT_EXT_NSS_BW)
1347                         ieee80211_hw_set(hw, SUPPORTS_VHT_EXT_NSS_BW);
1348         }
1349
1350         /*
1351          * If the VHT capabilities don't have IEEE80211_VHT_EXT_NSS_BW_CAPABLE,
1352          * or have it when we don't, copy the sband structure and set/clear it.
1353          * This is necessary because rate scaling algorithms could be switched
1354          * and have different support values.
1355          * Print a message so that in the common case the reallocation can be
1356          * avoided.
1357          */
1358         BUILD_BUG_ON(NUM_NL80211_BANDS > 8 * sizeof(local->sband_allocated));
1359         for (band = 0; band < NUM_NL80211_BANDS; band++) {
1360                 struct ieee80211_supported_band *sband;
1361                 bool local_cap, ie_cap;
1362
1363                 local_cap = ieee80211_hw_check(hw, SUPPORTS_VHT_EXT_NSS_BW);
1364
1365                 sband = local->hw.wiphy->bands[band];
1366                 if (!sband || !sband->vht_cap.vht_supported)
1367                         continue;
1368
1369                 ie_cap = !!(sband->vht_cap.vht_mcs.tx_highest &
1370                             cpu_to_le16(IEEE80211_VHT_EXT_NSS_BW_CAPABLE));
1371
1372                 if (local_cap == ie_cap)
1373                         continue;
1374
1375                 sband = kmemdup(sband, sizeof(*sband), GFP_KERNEL);
1376                 if (!sband) {
1377                         result = -ENOMEM;
1378                         goto fail_rate;
1379                 }
1380
1381                 wiphy_dbg(hw->wiphy, "copying sband (band %d) due to VHT EXT NSS BW flag\n",
1382                           band);
1383
1384                 sband->vht_cap.vht_mcs.tx_highest ^=
1385                         cpu_to_le16(IEEE80211_VHT_EXT_NSS_BW_CAPABLE);
1386
1387                 local->hw.wiphy->bands[band] = sband;
1388                 local->sband_allocated |= BIT(band);
1389         }
1390
1391         result = wiphy_register(local->hw.wiphy);
1392         if (result < 0)
1393                 goto fail_wiphy_register;
1394
1395         debugfs_hw_add(local);
1396         rate_control_add_debugfs(local);
1397
1398         rtnl_lock();
1399         wiphy_lock(hw->wiphy);
1400
1401         /* add one default STA interface if supported */
1402         if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_STATION) &&
1403             !ieee80211_hw_check(hw, NO_AUTO_VIF)) {
1404                 struct vif_params params = {0};
1405
1406                 result = ieee80211_if_add(local, "wlan%d", NET_NAME_ENUM, NULL,
1407                                           NL80211_IFTYPE_STATION, &params);
1408                 if (result)
1409                         wiphy_warn(local->hw.wiphy,
1410                                    "Failed to add default virtual iface\n");
1411         }
1412
1413         wiphy_unlock(hw->wiphy);
1414         rtnl_unlock();
1415
1416 #ifdef CONFIG_INET
1417         local->ifa_notifier.notifier_call = ieee80211_ifa_changed;
1418         result = register_inetaddr_notifier(&local->ifa_notifier);
1419         if (result)
1420                 goto fail_ifa;
1421 #endif
1422
1423 #if IS_ENABLED(CONFIG_IPV6)
1424         local->ifa6_notifier.notifier_call = ieee80211_ifa6_changed;
1425         result = register_inet6addr_notifier(&local->ifa6_notifier);
1426         if (result)
1427                 goto fail_ifa6;
1428 #endif
1429
1430         return 0;
1431
1432 #if IS_ENABLED(CONFIG_IPV6)
1433  fail_ifa6:
1434 #ifdef CONFIG_INET
1435         unregister_inetaddr_notifier(&local->ifa_notifier);
1436 #endif
1437 #endif
1438 #if defined(CONFIG_INET) || defined(CONFIG_IPV6)
1439  fail_ifa:
1440 #endif
1441         wiphy_unregister(local->hw.wiphy);
1442  fail_wiphy_register:
1443         rtnl_lock();
1444         rate_control_deinitialize(local);
1445         ieee80211_remove_interfaces(local);
1446         rtnl_unlock();
1447  fail_rate:
1448  fail_flows:
1449         ieee80211_led_exit(local);
1450         destroy_workqueue(local->workqueue);
1451  fail_workqueue:
1452         if (local->wiphy_ciphers_allocated) {
1453                 kfree(local->hw.wiphy->cipher_suites);
1454                 local->wiphy_ciphers_allocated = false;
1455         }
1456         kfree(local->int_scan_req);
1457         return result;
1458 }
1459 EXPORT_SYMBOL(ieee80211_register_hw);
1460
1461 void ieee80211_unregister_hw(struct ieee80211_hw *hw)
1462 {
1463         struct ieee80211_local *local = hw_to_local(hw);
1464
1465         tasklet_kill(&local->tx_pending_tasklet);
1466         tasklet_kill(&local->tasklet);
1467
1468 #ifdef CONFIG_INET
1469         unregister_inetaddr_notifier(&local->ifa_notifier);
1470 #endif
1471 #if IS_ENABLED(CONFIG_IPV6)
1472         unregister_inet6addr_notifier(&local->ifa6_notifier);
1473 #endif
1474
1475         rtnl_lock();
1476
1477         /*
1478          * At this point, interface list manipulations are fine
1479          * because the driver cannot be handing us frames any
1480          * more and the tasklet is killed.
1481          */
1482         ieee80211_remove_interfaces(local);
1483
1484         rtnl_unlock();
1485
1486         cancel_delayed_work_sync(&local->roc_work);
1487         cancel_work_sync(&local->restart_work);
1488         cancel_work_sync(&local->reconfig_filter);
1489         flush_work(&local->sched_scan_stopped_work);
1490         flush_work(&local->radar_detected_work);
1491
1492         ieee80211_clear_tx_pending(local);
1493         rate_control_deinitialize(local);
1494
1495         if (skb_queue_len(&local->skb_queue) ||
1496             skb_queue_len(&local->skb_queue_unreliable))
1497                 wiphy_warn(local->hw.wiphy, "skb_queue not empty\n");
1498         skb_queue_purge(&local->skb_queue);
1499         skb_queue_purge(&local->skb_queue_unreliable);
1500
1501         wiphy_unregister(local->hw.wiphy);
1502         destroy_workqueue(local->workqueue);
1503         ieee80211_led_exit(local);
1504         kfree(local->int_scan_req);
1505 }
1506 EXPORT_SYMBOL(ieee80211_unregister_hw);
1507
1508 static int ieee80211_free_ack_frame(int id, void *p, void *data)
1509 {
1510         WARN_ONCE(1, "Have pending ack frames!\n");
1511         kfree_skb(p);
1512         return 0;
1513 }
1514
1515 void ieee80211_free_hw(struct ieee80211_hw *hw)
1516 {
1517         struct ieee80211_local *local = hw_to_local(hw);
1518         enum nl80211_band band;
1519
1520         mutex_destroy(&local->iflist_mtx);
1521         mutex_destroy(&local->mtx);
1522
1523         if (local->wiphy_ciphers_allocated) {
1524                 kfree(local->hw.wiphy->cipher_suites);
1525                 local->wiphy_ciphers_allocated = false;
1526         }
1527
1528         idr_for_each(&local->ack_status_frames,
1529                      ieee80211_free_ack_frame, NULL);
1530         idr_destroy(&local->ack_status_frames);
1531
1532         sta_info_stop(local);
1533
1534         ieee80211_free_led_names(local);
1535
1536         for (band = 0; band < NUM_NL80211_BANDS; band++) {
1537                 if (!(local->sband_allocated & BIT(band)))
1538                         continue;
1539                 kfree(local->hw.wiphy->bands[band]);
1540         }
1541
1542         wiphy_free(local->hw.wiphy);
1543 }
1544 EXPORT_SYMBOL(ieee80211_free_hw);
1545
1546 static const char * const drop_reasons_monitor[] = {
1547 #define V(x)    #x,
1548         [0] = "RX_DROP_MONITOR",
1549         MAC80211_DROP_REASONS_MONITOR(V)
1550 };
1551
1552 static struct drop_reason_list drop_reason_list_monitor = {
1553         .reasons = drop_reasons_monitor,
1554         .n_reasons = ARRAY_SIZE(drop_reasons_monitor),
1555 };
1556
1557 static const char * const drop_reasons_unusable[] = {
1558         [0] = "RX_DROP_UNUSABLE",
1559         MAC80211_DROP_REASONS_UNUSABLE(V)
1560 #undef V
1561 };
1562
1563 static struct drop_reason_list drop_reason_list_unusable = {
1564         .reasons = drop_reasons_unusable,
1565         .n_reasons = ARRAY_SIZE(drop_reasons_unusable),
1566 };
1567
1568 static int __init ieee80211_init(void)
1569 {
1570         struct sk_buff *skb;
1571         int ret;
1572
1573         BUILD_BUG_ON(sizeof(struct ieee80211_tx_info) > sizeof(skb->cb));
1574         BUILD_BUG_ON(offsetof(struct ieee80211_tx_info, driver_data) +
1575                      IEEE80211_TX_INFO_DRIVER_DATA_SIZE > sizeof(skb->cb));
1576
1577         ret = rc80211_minstrel_init();
1578         if (ret)
1579                 return ret;
1580
1581         ret = ieee80211_iface_init();
1582         if (ret)
1583                 goto err_netdev;
1584
1585         drop_reasons_register_subsys(SKB_DROP_REASON_SUBSYS_MAC80211_MONITOR,
1586                                      &drop_reason_list_monitor);
1587         drop_reasons_register_subsys(SKB_DROP_REASON_SUBSYS_MAC80211_UNUSABLE,
1588                                      &drop_reason_list_unusable);
1589
1590         return 0;
1591  err_netdev:
1592         rc80211_minstrel_exit();
1593
1594         return ret;
1595 }
1596
1597 static void __exit ieee80211_exit(void)
1598 {
1599         rc80211_minstrel_exit();
1600
1601         ieee80211s_stop();
1602
1603         ieee80211_iface_exit();
1604
1605         drop_reasons_unregister_subsys(SKB_DROP_REASON_SUBSYS_MAC80211_MONITOR);
1606         drop_reasons_unregister_subsys(SKB_DROP_REASON_SUBSYS_MAC80211_UNUSABLE);
1607
1608         rcu_barrier();
1609 }
1610
1611
1612 subsys_initcall(ieee80211_init);
1613 module_exit(ieee80211_exit);
1614
1615 MODULE_DESCRIPTION("IEEE 802.11 subsystem");
1616 MODULE_LICENSE("GPL");