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) 2018-2021 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/cfg80211.h>
  26 #include <net/addrconf.h>
  27
  28 #include "ieee80211_i.h"
  29 #include "driver-ops.h"
  30 #include "rate.h"
  31 #include "mesh.h"
  32 #include "wep.h"
  33 #include "led.h"
  34 #include "debugfs.h"
  35
  36 void ieee80211_configure_filter(struct ieee80211_local *local)
  37 {
  38         u64 mc;
  39         unsigned int changed_flags;
  40         unsigned int new_flags = 0;
  41
  42         if (atomic_read(&local->iff_allmultis))
  43                 new_flags |= FIF_ALLMULTI;
  44
  45         if (local->monitors || test_bit(SCAN_SW_SCANNING, &local->scanning) ||
  46             test_bit(SCAN_ONCHANNEL_SCANNING, &local->scanning))
  47                 new_flags |= FIF_BCN_PRBRESP_PROMISC;
  48
  49         if (local->fif_probe_req || local->probe_req_reg)
  50                 new_flags |= FIF_PROBE_REQ;
  51
  52         if (local->fif_fcsfail)
  53                 new_flags |= FIF_FCSFAIL;
  54
  55         if (local->fif_plcpfail)
  56                 new_flags |= FIF_PLCPFAIL;
  57
  58         if (local->fif_control)
  59                 new_flags |= FIF_CONTROL;
  60
  61         if (local->fif_other_bss)
  62                 new_flags |= FIF_OTHER_BSS;
  63
  64         if (local->fif_pspoll)
  65                 new_flags |= FIF_PSPOLL;
  66
  67         if (local->rx_mcast_action_reg)
  68                 new_flags |= FIF_MCAST_ACTION;
  69
  70         spin_lock_bh(&local->filter_lock);
  71         changed_flags = local->filter_flags ^ new_flags;
  72
  73         mc = drv_prepare_multicast(local, &local->mc_list);
  74         spin_unlock_bh(&local->filter_lock);
  75
  76         /* be a bit nasty */
  77         new_flags |= (1<<31);
  78
  79         drv_configure_filter(local, changed_flags, &new_flags, mc);
  80
  81         WARN_ON(new_flags & (1<<31));
  82
  83         local->filter_flags = new_flags & ~(1<<31);
  84 }
  85
  86 static void ieee80211_reconfig_filter(struct work_struct *work)
  87 {
  88         struct ieee80211_local *local =
  89                 container_of(work, struct ieee80211_local, reconfig_filter);
  90
  91         ieee80211_configure_filter(local);
  92 }
  93
  94 static u32 ieee80211_hw_conf_chan(struct ieee80211_local *local)
  95 {
  96         struct ieee80211_sub_if_data *sdata;
  97         struct cfg80211_chan_def chandef = {};
  98         u32 changed = 0;
  99         int power;
 100         u32 offchannel_flag;
 101
 102         offchannel_flag = local->hw.conf.flags & IEEE80211_CONF_OFFCHANNEL;
 103
 104         if (local->scan_chandef.chan) {
 105                 chandef = local->scan_chandef;
 106         } else if (local->tmp_channel) {
 107                 chandef.chan = local->tmp_channel;
 108                 chandef.width = NL80211_CHAN_WIDTH_20_NOHT;
 109                 chandef.center_freq1 = chandef.chan->center_freq;
 110                 chandef.freq1_offset = chandef.chan->freq_offset;
 111         } else
 112                 chandef = local->_oper_chandef;
 113
 114         WARN(!cfg80211_chandef_valid(&chandef),
 115              "control:%d.%03d MHz width:%d center: %d.%03d/%d MHz",
 116              chandef.chan->center_freq, chandef.chan->freq_offset,
 117              chandef.width, chandef.center_freq1, chandef.freq1_offset,
 118              chandef.center_freq2);
 119
 120         if (!cfg80211_chandef_identical(&chandef, &local->_oper_chandef))
 121                 local->hw.conf.flags |= IEEE80211_CONF_OFFCHANNEL;
 122         else
 123                 local->hw.conf.flags &= ~IEEE80211_CONF_OFFCHANNEL;
 124
 125         offchannel_flag ^= local->hw.conf.flags & IEEE80211_CONF_OFFCHANNEL;
 126
 127         if (offchannel_flag ||
 128             !cfg80211_chandef_identical(&local->hw.conf.chandef,
 129                                         &local->_oper_chandef)) {
 130                 local->hw.conf.chandef = chandef;
 131                 changed |= IEEE80211_CONF_CHANGE_CHANNEL;
 132         }
 133
 134         if (!conf_is_ht(&local->hw.conf)) {
 135                 /*
 136                  * mac80211.h documents that this is only valid
 137                  * when the channel is set to an HT type, and
 138                  * that otherwise STATIC is used.
 139                  */
 140                 local->hw.conf.smps_mode = IEEE80211_SMPS_STATIC;
 141         } else if (local->hw.conf.smps_mode != local->smps_mode) {
 142                 local->hw.conf.smps_mode = local->smps_mode;
 143                 changed |= IEEE80211_CONF_CHANGE_SMPS;
 144         }
 145
 146         power = ieee80211_chandef_max_power(&chandef);
 147
 148         rcu_read_lock();
 149         list_for_each_entry_rcu(sdata, &local->interfaces, list) {
 150                 if (!rcu_access_pointer(sdata->vif.chanctx_conf))
 151                         continue;
 152                 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
 153                         continue;
 154                 if (sdata->vif.bss_conf.txpower == INT_MIN)
 155                         continue;
 156                 power = min(power, sdata->vif.bss_conf.txpower);
 157         }
 158         rcu_read_unlock();
 159
 160         if (local->hw.conf.power_level != power) {
 161                 changed |= IEEE80211_CONF_CHANGE_POWER;
 162                 local->hw.conf.power_level = power;
 163         }
 164
 165         return changed;
 166 }
 167
 168 int ieee80211_hw_config(struct ieee80211_local *local, u32 changed)
 169 {
 170         int ret = 0;
 171
 172         might_sleep();
 173
 174         if (!local->use_chanctx)
 175                 changed |= ieee80211_hw_conf_chan(local);
 176         else
 177                 changed &= ~(IEEE80211_CONF_CHANGE_CHANNEL |
 178                              IEEE80211_CONF_CHANGE_POWER);
 179
 180         if (changed && local->open_count) {
 181                 ret = drv_config(local, changed);
 182                 /*
 183                  * Goal:
 184                  * HW reconfiguration should never fail, the driver has told
 185                  * us what it can support so it should live up to that promise.
 186                  *
 187                  * Current status:
 188                  * rfkill is not integrated with mac80211 and a
 189                  * configuration command can thus fail if hardware rfkill
 190                  * is enabled
 191                  *
 192                  * FIXME: integrate rfkill with mac80211 and then add this
 193                  * WARN_ON() back
 194                  *
 195                  */
 196                 /* WARN_ON(ret); */
 197         }
 198
 199         return ret;
 200 }
 201
 202 void ieee80211_bss_info_change_notify(struct ieee80211_sub_if_data *sdata,
 203                                       u32 changed)
 204 {
 205         struct ieee80211_local *local = sdata->local;
 206
 207         if (!changed || sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
 208                 return;
 209
 210         drv_bss_info_changed(local, sdata, &sdata->vif.bss_conf, changed);
 211 }
 212
 213 u32 ieee80211_reset_erp_info(struct ieee80211_sub_if_data *sdata)
 214 {
 215         sdata->vif.bss_conf.use_cts_prot = false;
 216         sdata->vif.bss_conf.use_short_preamble = false;
 217         sdata->vif.bss_conf.use_short_slot = false;
 218         return BSS_CHANGED_ERP_CTS_PROT |
 219                BSS_CHANGED_ERP_PREAMBLE |
 220                BSS_CHANGED_ERP_SLOT;
 221 }
 222
 223 static void ieee80211_tasklet_handler(struct tasklet_struct *t)
 224 {
 225         struct ieee80211_local *local = from_tasklet(local, t, tasklet);
 226         struct sk_buff *skb;
 227
 228         while ((skb = skb_dequeue(&local->skb_queue)) ||
 229                (skb = skb_dequeue(&local->skb_queue_unreliable))) {
 230                 switch (skb->pkt_type) {
 231                 case IEEE80211_RX_MSG:
 232                         /* Clear skb->pkt_type in order to not confuse kernel
 233                          * netstack. */
 234                         skb->pkt_type = 0;
 235                         ieee80211_rx(&local->hw, skb);
 236                         break;
 237                 case IEEE80211_TX_STATUS_MSG:
 238                         skb->pkt_type = 0;
 239                         ieee80211_tx_status(&local->hw, skb);
 240                         break;
 241                 default:
 242                         WARN(1, "mac80211: Packet is of unknown type %d\n",
 243                              skb->pkt_type);
 244                         dev_kfree_skb(skb);
 245                         break;
 246                 }
 247         }
 248 }
 249
 250 static void ieee80211_restart_work(struct work_struct *work)
 251 {
 252         struct ieee80211_local *local =
 253                 container_of(work, struct ieee80211_local, restart_work);
 254         struct ieee80211_sub_if_data *sdata;
 255         int ret;
 256
 257         /* wait for scan work complete */
 258         flush_workqueue(local->workqueue);
 259         flush_work(&local->sched_scan_stopped_work);
 260         flush_work(&local->radar_detected_work);
 261
 262         rtnl_lock();
 263
 264         WARN(test_bit(SCAN_HW_SCANNING, &local->scanning),
 265              "%s called with hardware scan in progress\n", __func__);
 266
 267         list_for_each_entry(sdata, &local->interfaces, list) {
 268                 /*
 269                  * XXX: there may be more work for other vif types and even
 270                  * for station mode: a good thing would be to run most of
 271                  * the iface type's dependent _stop (ieee80211_mg_stop,
 272                  * ieee80211_ibss_stop) etc...
 273                  * For now, fix only the specific bug that was seen: race
 274                  * between csa_connection_drop_work and us.
 275                  */
 276                 if (sdata->vif.type == NL80211_IFTYPE_STATION) {
 277                         /*
 278                          * This worker is scheduled from the iface worker that
 279                          * runs on mac80211's workqueue, so we can't be
 280                          * scheduling this worker after the cancel right here.
 281                          * The exception is ieee80211_chswitch_done.
 282                          * Then we can have a race...
 283                          */
 284                         cancel_work_sync(&sdata->u.mgd.csa_connection_drop_work);
 285                         if (sdata->vif.csa_active) {
 286                                 sdata_lock(sdata);
 287                                 ieee80211_sta_connection_lost(sdata,
 288                                                               sdata->u.mgd.associated->bssid,
 289                                                               WLAN_REASON_UNSPECIFIED, false);
 290                                 sdata_unlock(sdata);
 291                         }
 292                 }
 293                 flush_delayed_work(&sdata->dec_tailroom_needed_wk);
 294         }
 295         ieee80211_scan_cancel(local);
 296
 297         /* make sure any new ROC will consider local->in_reconfig */
 298         flush_delayed_work(&local->roc_work);
 299         flush_work(&local->hw_roc_done);
 300
 301         /* wait for all packet processing to be done */
 302         synchronize_net();
 303
 304         ret = ieee80211_reconfig(local);
 305         wiphy_unlock(local->hw.wiphy);
 306
 307         if (ret)
 308                 cfg80211_shutdown_all_interfaces(local->hw.wiphy);
 309
 310         rtnl_unlock();
 311 }
 312
 313 void ieee80211_restart_hw(struct ieee80211_hw *hw)
 314 {
 315         struct ieee80211_local *local = hw_to_local(hw);
 316
 317         trace_api_restart_hw(local);
 318
 319         wiphy_info(hw->wiphy,
 320                    "Hardware restart was requested\n");
 321
 322         /* use this reason, ieee80211_reconfig will unblock it */
 323         ieee80211_stop_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP,
 324                                         IEEE80211_QUEUE_STOP_REASON_SUSPEND,
 325                                         false);
 326
 327         /*
 328          * Stop all Rx during the reconfig. We don't want state changes
 329          * or driver callbacks while this is in progress.
 330          */
 331         local->in_reconfig = true;
 332         barrier();
 333
 334         queue_work(system_freezable_wq, &local->restart_work);
 335 }
 336 EXPORT_SYMBOL(ieee80211_restart_hw);
 337
 338 #ifdef CONFIG_INET
 339 static int ieee80211_ifa_changed(struct notifier_block *nb,
 340                                  unsigned long data, void *arg)
 341 {
 342         struct in_ifaddr *ifa = arg;
 343         struct ieee80211_local *local =
 344                 container_of(nb, struct ieee80211_local,
 345                              ifa_notifier);
 346         struct net_device *ndev = ifa->ifa_dev->dev;
 347         struct wireless_dev *wdev = ndev->ieee80211_ptr;
 348         struct in_device *idev;
 349         struct ieee80211_sub_if_data *sdata;
 350         struct ieee80211_bss_conf *bss_conf;
 351         struct ieee80211_if_managed *ifmgd;
 352         int c = 0;
 353
 354         /* Make sure it's our interface that got changed */
 355         if (!wdev)
 356                 return NOTIFY_DONE;
 357
 358         if (wdev->wiphy != local->hw.wiphy)
 359                 return NOTIFY_DONE;
 360
 361         sdata = IEEE80211_DEV_TO_SUB_IF(ndev);
 362         bss_conf = &sdata->vif.bss_conf;
 363
 364         /* ARP filtering is only supported in managed mode */
 365         if (sdata->vif.type != NL80211_IFTYPE_STATION)
 366                 return NOTIFY_DONE;
 367
 368         idev = __in_dev_get_rtnl(sdata->dev);
 369         if (!idev)
 370                 return NOTIFY_DONE;
 371
 372         ifmgd = &sdata->u.mgd;
 373         sdata_lock(sdata);
 374
 375         /* Copy the addresses to the bss_conf list */
 376         ifa = rtnl_dereference(idev->ifa_list);
 377         while (ifa) {
 378                 if (c < IEEE80211_BSS_ARP_ADDR_LIST_LEN)
 379                         bss_conf->arp_addr_list[c] = ifa->ifa_address;
 380                 ifa = rtnl_dereference(ifa->ifa_next);
 381                 c++;
 382         }
 383
 384         bss_conf->arp_addr_cnt = c;
 385
 386         /* Configure driver only if associated (which also implies it is up) */
 387         if (ifmgd->associated)
 388                 ieee80211_bss_info_change_notify(sdata,
 389                                                  BSS_CHANGED_ARP_FILTER);
 390
 391         sdata_unlock(sdata);
 392
 393         return NOTIFY_OK;
 394 }
 395 #endif
 396
 397 #if IS_ENABLED(CONFIG_IPV6)
 398 static int ieee80211_ifa6_changed(struct notifier_block *nb,
 399                                   unsigned long data, void *arg)
 400 {
 401         struct inet6_ifaddr *ifa = (struct inet6_ifaddr *)arg;
 402         struct inet6_dev *idev = ifa->idev;
 403         struct net_device *ndev = ifa->idev->dev;
 404         struct ieee80211_local *local =
 405                 container_of(nb, struct ieee80211_local, ifa6_notifier);
 406         struct wireless_dev *wdev = ndev->ieee80211_ptr;
 407         struct ieee80211_sub_if_data *sdata;
 408
 409         /* Make sure it's our interface that got changed */
 410         if (!wdev || wdev->wiphy != local->hw.wiphy)
 411                 return NOTIFY_DONE;
 412
 413         sdata = IEEE80211_DEV_TO_SUB_IF(ndev);
 414
 415         /*
 416          * For now only support station mode. This is mostly because
 417          * doing AP would have to handle AP_VLAN in some way ...
 418          */
 419         if (sdata->vif.type != NL80211_IFTYPE_STATION)
 420                 return NOTIFY_DONE;
 421
 422         drv_ipv6_addr_change(local, sdata, idev);
 423
 424         return NOTIFY_OK;
 425 }
 426 #endif
 427
 428 /* There isn't a lot of sense in it, but you can transmit anything you like */
 429 static const struct ieee80211_txrx_stypes
 430 ieee80211_default_mgmt_stypes[NUM_NL80211_IFTYPES] = {
 431         [NL80211_IFTYPE_ADHOC] = {
 432                 .tx = 0xffff,
 433                 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
 434                         BIT(IEEE80211_STYPE_AUTH >> 4) |
 435                         BIT(IEEE80211_STYPE_DEAUTH >> 4) |
 436                         BIT(IEEE80211_STYPE_PROBE_REQ >> 4),
 437         },
 438         [NL80211_IFTYPE_STATION] = {
 439                 .tx = 0xffff,
 440                 /*
 441                  * To support Pre Association Security Negotiation (PASN) while
 442                  * already associated to one AP, allow user space to register to
 443                  * Rx authentication frames, so that the user space logic would
 444                  * be able to receive/handle authentication frames from a
 445                  * different AP as part of PASN.
 446                  * It is expected that user space would intelligently register
 447                  * for Rx authentication frames, i.e., only when PASN is used
 448                  * and configure a match filter only for PASN authentication
 449                  * algorithm, as otherwise the MLME functionality of mac80211
 450                  * would be broken.
 451                  */
 452                 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
 453                         BIT(IEEE80211_STYPE_AUTH >> 4) |
 454                         BIT(IEEE80211_STYPE_PROBE_REQ >> 4),
 455         },
 456         [NL80211_IFTYPE_AP] = {
 457                 .tx = 0xffff,
 458                 .rx = BIT(IEEE80211_STYPE_ASSOC_REQ >> 4) |
 459                         BIT(IEEE80211_STYPE_REASSOC_REQ >> 4) |
 460                         BIT(IEEE80211_STYPE_PROBE_REQ >> 4) |
 461                         BIT(IEEE80211_STYPE_DISASSOC >> 4) |
 462                         BIT(IEEE80211_STYPE_AUTH >> 4) |
 463                         BIT(IEEE80211_STYPE_DEAUTH >> 4) |
 464                         BIT(IEEE80211_STYPE_ACTION >> 4),
 465         },
 466         [NL80211_IFTYPE_AP_VLAN] = {
 467                 /* copy AP */
 468                 .tx = 0xffff,
 469                 .rx = BIT(IEEE80211_STYPE_ASSOC_REQ >> 4) |
 470                         BIT(IEEE80211_STYPE_REASSOC_REQ >> 4) |
 471                         BIT(IEEE80211_STYPE_PROBE_REQ >> 4) |
 472                         BIT(IEEE80211_STYPE_DISASSOC >> 4) |
 473                         BIT(IEEE80211_STYPE_AUTH >> 4) |
 474                         BIT(IEEE80211_STYPE_DEAUTH >> 4) |
 475                         BIT(IEEE80211_STYPE_ACTION >> 4),
 476         },
 477         [NL80211_IFTYPE_P2P_CLIENT] = {
 478                 .tx = 0xffff,
 479                 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
 480                         BIT(IEEE80211_STYPE_PROBE_REQ >> 4),
 481         },
 482         [NL80211_IFTYPE_P2P_GO] = {
 483                 .tx = 0xffff,
 484                 .rx = BIT(IEEE80211_STYPE_ASSOC_REQ >> 4) |
 485                         BIT(IEEE80211_STYPE_REASSOC_REQ >> 4) |
 486                         BIT(IEEE80211_STYPE_PROBE_REQ >> 4) |
 487                         BIT(IEEE80211_STYPE_DISASSOC >> 4) |
 488                         BIT(IEEE80211_STYPE_AUTH >> 4) |
 489                         BIT(IEEE80211_STYPE_DEAUTH >> 4) |
 490                         BIT(IEEE80211_STYPE_ACTION >> 4),
 491         },
 492         [NL80211_IFTYPE_MESH_POINT] = {
 493                 .tx = 0xffff,
 494                 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
 495                         BIT(IEEE80211_STYPE_AUTH >> 4) |
 496                         BIT(IEEE80211_STYPE_DEAUTH >> 4),
 497         },
 498         [NL80211_IFTYPE_P2P_DEVICE] = {
 499                 .tx = 0xffff,
 500                 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
 501                         BIT(IEEE80211_STYPE_PROBE_REQ >> 4),
 502         },
 503 };
 504
 505 static const struct ieee80211_ht_cap mac80211_ht_capa_mod_mask = {
 506         .ampdu_params_info = IEEE80211_HT_AMPDU_PARM_FACTOR |
 507                              IEEE80211_HT_AMPDU_PARM_DENSITY,
 508
 509         .cap_info = cpu_to_le16(IEEE80211_HT_CAP_SUP_WIDTH_20_40 |
 510                                 IEEE80211_HT_CAP_MAX_AMSDU |
 511                                 IEEE80211_HT_CAP_SGI_20 |
 512                                 IEEE80211_HT_CAP_SGI_40 |
 513                                 IEEE80211_HT_CAP_TX_STBC |
 514                                 IEEE80211_HT_CAP_RX_STBC |
 515                                 IEEE80211_HT_CAP_LDPC_CODING |
 516                                 IEEE80211_HT_CAP_40MHZ_INTOLERANT),
 517         .mcs = {
 518                 .rx_mask = { 0xff, 0xff, 0xff, 0xff, 0xff,
 519                              0xff, 0xff, 0xff, 0xff, 0xff, },
 520         },
 521 };
 522
 523 static const struct ieee80211_vht_cap mac80211_vht_capa_mod_mask = {
 524         .vht_cap_info =
 525                 cpu_to_le32(IEEE80211_VHT_CAP_RXLDPC |
 526                             IEEE80211_VHT_CAP_SHORT_GI_80 |
 527                             IEEE80211_VHT_CAP_SHORT_GI_160 |
 528                             IEEE80211_VHT_CAP_RXSTBC_MASK |
 529                             IEEE80211_VHT_CAP_TXSTBC |
 530                             IEEE80211_VHT_CAP_SU_BEAMFORMER_CAPABLE |
 531                             IEEE80211_VHT_CAP_SU_BEAMFORMEE_CAPABLE |
 532                             IEEE80211_VHT_CAP_TX_ANTENNA_PATTERN |
 533                             IEEE80211_VHT_CAP_RX_ANTENNA_PATTERN |
 534                             IEEE80211_VHT_CAP_MAX_A_MPDU_LENGTH_EXPONENT_MASK),
 535         .supp_mcs = {
 536                 .rx_mcs_map = cpu_to_le16(~0),
 537                 .tx_mcs_map = cpu_to_le16(~0),
 538         },
 539 };
 540
 541 struct ieee80211_hw *ieee80211_alloc_hw_nm(size_t priv_data_len,
 542                                            const struct ieee80211_ops *ops,
 543                                            const char *requested_name)
 544 {
 545         struct ieee80211_local *local;
 546         int priv_size, i;
 547         struct wiphy *wiphy;
 548         bool use_chanctx;
 549
 550         if (WARN_ON(!ops->tx || !ops->start || !ops->stop || !ops->config ||
 551                     !ops->add_interface || !ops->remove_interface ||
 552                     !ops->configure_filter))
 553                 return NULL;
 554
 555         if (WARN_ON(ops->sta_state && (ops->sta_add || ops->sta_remove)))
 556                 return NULL;
 557
 558         /* check all or no channel context operations exist */
 559         i = !!ops->add_chanctx + !!ops->remove_chanctx +
 560             !!ops->change_chanctx + !!ops->assign_vif_chanctx +
 561             !!ops->unassign_vif_chanctx;
 562         if (WARN_ON(i != 0 && i != 5))
 563                 return NULL;
 564         use_chanctx = i == 5;
 565
 566         /* Ensure 32-byte alignment of our private data and hw private data.
 567          * We use the wiphy priv data for both our ieee80211_local and for
 568          * the driver's private data
 569          *
 570          * In memory it'll be like this:
 571          *
 572          * +-------------------------+
 573          * | struct wiphy           |
 574          * +-------------------------+
 575          * | struct ieee80211_local  |
 576          * +-------------------------+
 577          * | driver's private data   |
 578          * +-------------------------+
 579          *
 580          */
 581         priv_size = ALIGN(sizeof(*local), NETDEV_ALIGN) + priv_data_len;
 582
 583         wiphy = wiphy_new_nm(&mac80211_config_ops, priv_size, requested_name);
 584
 585         if (!wiphy)
 586                 return NULL;
 587
 588         wiphy->mgmt_stypes = ieee80211_default_mgmt_stypes;
 589
 590         wiphy->privid = mac80211_wiphy_privid;
 591
 592         wiphy->flags |= WIPHY_FLAG_NETNS_OK |
 593                         WIPHY_FLAG_4ADDR_AP |
 594                         WIPHY_FLAG_4ADDR_STATION |
 595                         WIPHY_FLAG_REPORTS_OBSS |
 596                         WIPHY_FLAG_OFFCHAN_TX;
 597
 598         if (!use_chanctx || ops->remain_on_channel)
 599                 wiphy->flags |= WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL;
 600
 601         wiphy->features |= NL80211_FEATURE_SK_TX_STATUS |
 602                            NL80211_FEATURE_SAE |
 603                            NL80211_FEATURE_HT_IBSS |
 604                            NL80211_FEATURE_VIF_TXPOWER |
 605                            NL80211_FEATURE_MAC_ON_CREATE |
 606                            NL80211_FEATURE_USERSPACE_MPM |
 607                            NL80211_FEATURE_FULL_AP_CLIENT_STATE;
 608         wiphy_ext_feature_set(wiphy, NL80211_EXT_FEATURE_FILS_STA);
 609         wiphy_ext_feature_set(wiphy,
 610                               NL80211_EXT_FEATURE_CONTROL_PORT_OVER_NL80211);
 611         wiphy_ext_feature_set(wiphy,
 612                               NL80211_EXT_FEATURE_CONTROL_PORT_NO_PREAUTH);
 613         wiphy_ext_feature_set(wiphy,
 614                               NL80211_EXT_FEATURE_CONTROL_PORT_OVER_NL80211_TX_STATUS);
 615         wiphy_ext_feature_set(wiphy,
 616                               NL80211_EXT_FEATURE_SCAN_FREQ_KHZ);
 617
 618         if (!ops->hw_scan) {
 619                 wiphy->features |= NL80211_FEATURE_LOW_PRIORITY_SCAN |
 620                                    NL80211_FEATURE_AP_SCAN;
 621                 /*
 622                  * if the driver behaves correctly using the probe request
 623                  * (template) from mac80211, then both of these should be
 624                  * supported even with hw scan - but let drivers opt in.
 625                  */
 626                 wiphy_ext_feature_set(wiphy,
 627                                       NL80211_EXT_FEATURE_SCAN_RANDOM_SN);
 628                 wiphy_ext_feature_set(wiphy,
 629                                       NL80211_EXT_FEATURE_SCAN_MIN_PREQ_CONTENT);
 630         }
 631
 632         if (!ops->set_key)
 633                 wiphy->flags |= WIPHY_FLAG_IBSS_RSN;
 634
 635         if (ops->wake_tx_queue)
 636                 wiphy_ext_feature_set(wiphy, NL80211_EXT_FEATURE_TXQS);
 637
 638         wiphy_ext_feature_set(wiphy, NL80211_EXT_FEATURE_RRM);
 639
 640         wiphy->bss_priv_size = sizeof(struct ieee80211_bss);
 641
 642         local = wiphy_priv(wiphy);
 643
 644         if (sta_info_init(local))
 645                 goto err_free;
 646
 647         local->hw.wiphy = wiphy;
 648
 649         local->hw.priv = (char *)local + ALIGN(sizeof(*local), NETDEV_ALIGN);
 650
 651         local->ops = ops;
 652         local->use_chanctx = use_chanctx;
 653
 654         /*
 655          * We need a bit of data queued to build aggregates properly, so
 656          * instruct the TCP stack to allow more than a single ms of data
 657          * to be queued in the stack. The value is a bit-shift of 1
 658          * second, so 7 is ~8ms of queued data. Only affects local TCP
 659          * sockets.
 660          * This is the default, anyhow - drivers may need to override it
 661          * for local reasons (longer buffers, longer completion time, or
 662          * similar).
 663          */
 664         local->hw.tx_sk_pacing_shift = 7;
 665
 666         /* set up some defaults */
 667         local->hw.queues = 1;
 668         local->hw.max_rates = 1;
 669         local->hw.max_report_rates = 0;
 670         local->hw.max_rx_aggregation_subframes = IEEE80211_MAX_AMPDU_BUF_HT;
 671         local->hw.max_tx_aggregation_subframes = IEEE80211_MAX_AMPDU_BUF_HT;
 672         local->hw.offchannel_tx_hw_queue = IEEE80211_INVAL_HW_QUEUE;
 673         local->hw.conf.long_frame_max_tx_count = wiphy->retry_long;
 674         local->hw.conf.short_frame_max_tx_count = wiphy->retry_short;
 675         local->hw.radiotap_mcs_details = IEEE80211_RADIOTAP_MCS_HAVE_MCS |
 676                                          IEEE80211_RADIOTAP_MCS_HAVE_GI |
 677                                          IEEE80211_RADIOTAP_MCS_HAVE_BW;
 678         local->hw.radiotap_vht_details = IEEE80211_RADIOTAP_VHT_KNOWN_GI |
 679                                          IEEE80211_RADIOTAP_VHT_KNOWN_BANDWIDTH;
 680         local->hw.uapsd_queues = IEEE80211_DEFAULT_UAPSD_QUEUES;
 681         local->hw.uapsd_max_sp_len = IEEE80211_DEFAULT_MAX_SP_LEN;
 682         local->hw.max_mtu = IEEE80211_MAX_DATA_LEN;
 683         local->user_power_level = IEEE80211_UNSET_POWER_LEVEL;
 684         wiphy->ht_capa_mod_mask = &mac80211_ht_capa_mod_mask;
 685         wiphy->vht_capa_mod_mask = &mac80211_vht_capa_mod_mask;
 686
 687         local->ext_capa[7] = WLAN_EXT_CAPA8_OPMODE_NOTIF;
 688
 689         wiphy->extended_capabilities = local->ext_capa;
 690         wiphy->extended_capabilities_mask = local->ext_capa;
 691         wiphy->extended_capabilities_len =
 692                 ARRAY_SIZE(local->ext_capa);
 693
 694         INIT_LIST_HEAD(&local->interfaces);
 695         INIT_LIST_HEAD(&local->mon_list);
 696
 697         __hw_addr_init(&local->mc_list);
 698
 699         mutex_init(&local->iflist_mtx);
 700         mutex_init(&local->mtx);
 701
 702         mutex_init(&local->key_mtx);
 703         spin_lock_init(&local->filter_lock);
 704         spin_lock_init(&local->rx_path_lock);
 705         spin_lock_init(&local->queue_stop_reason_lock);
 706
 707         for (i = 0; i < IEEE80211_NUM_ACS; i++) {
 708                 struct airtime_sched_info *air_sched = &local->airtime[i];
 709
 710                 air_sched->active_txqs = RB_ROOT_CACHED;
 711                 INIT_LIST_HEAD(&air_sched->active_list);
 712                 spin_lock_init(&air_sched->lock);
 713                 air_sched->aql_txq_limit_low = IEEE80211_DEFAULT_AQL_TXQ_LIMIT_L;
 714                 air_sched->aql_txq_limit_high =
 715                         IEEE80211_DEFAULT_AQL_TXQ_LIMIT_H;
 716         }
 717
 718         local->airtime_flags = AIRTIME_USE_TX | AIRTIME_USE_RX;
 719         local->aql_threshold = IEEE80211_AQL_THRESHOLD;
 720         atomic_set(&local->aql_total_pending_airtime, 0);
 721
 722         INIT_LIST_HEAD(&local->chanctx_list);
 723         mutex_init(&local->chanctx_mtx);
 724
 725         INIT_DELAYED_WORK(&local->scan_work, ieee80211_scan_work);
 726
 727         INIT_WORK(&local->restart_work, ieee80211_restart_work);
 728
 729         INIT_WORK(&local->radar_detected_work,
 730                   ieee80211_dfs_radar_detected_work);
 731
 732         INIT_WORK(&local->reconfig_filter, ieee80211_reconfig_filter);
 733         local->smps_mode = IEEE80211_SMPS_OFF;
 734
 735         INIT_WORK(&local->dynamic_ps_enable_work,
 736                   ieee80211_dynamic_ps_enable_work);
 737         INIT_WORK(&local->dynamic_ps_disable_work,
 738                   ieee80211_dynamic_ps_disable_work);
 739         timer_setup(&local->dynamic_ps_timer, ieee80211_dynamic_ps_timer, 0);
 740
 741         INIT_WORK(&local->sched_scan_stopped_work,
 742                   ieee80211_sched_scan_stopped_work);
 743
 744         spin_lock_init(&local->ack_status_lock);
 745         idr_init(&local->ack_status_frames);
 746
 747         for (i = 0; i < IEEE80211_MAX_QUEUES; i++) {
 748                 skb_queue_head_init(&local->pending[i]);
 749                 atomic_set(&local->agg_queue_stop[i], 0);
 750         }
 751         tasklet_setup(&local->tx_pending_tasklet, ieee80211_tx_pending);
 752
 753         if (ops->wake_tx_queue)
 754                 tasklet_setup(&local->wake_txqs_tasklet, ieee80211_wake_txqs);
 755
 756         tasklet_setup(&local->tasklet, ieee80211_tasklet_handler);
 757
 758         skb_queue_head_init(&local->skb_queue);
 759         skb_queue_head_init(&local->skb_queue_unreliable);
 760
 761         ieee80211_alloc_led_names(local);
 762
 763         ieee80211_roc_setup(local);
 764
 765         local->hw.radiotap_timestamp.units_pos = -1;
 766         local->hw.radiotap_timestamp.accuracy = -1;
 767
 768         return &local->hw;
 769  err_free:
 770         wiphy_free(wiphy);
 771         return NULL;
 772 }
 773 EXPORT_SYMBOL(ieee80211_alloc_hw_nm);
 774
 775 static int ieee80211_init_cipher_suites(struct ieee80211_local *local)
 776 {
 777         bool have_wep = !fips_enabled; /* FIPS does not permit the use of RC4 */
 778         bool have_mfp = ieee80211_hw_check(&local->hw, MFP_CAPABLE);
 779         int n_suites = 0, r = 0, w = 0;
 780         u32 *suites;
 781         static const u32 cipher_suites[] = {
 782                 /* keep WEP first, it may be removed below */
 783                 WLAN_CIPHER_SUITE_WEP40,
 784                 WLAN_CIPHER_SUITE_WEP104,
 785                 WLAN_CIPHER_SUITE_TKIP,
 786                 WLAN_CIPHER_SUITE_CCMP,
 787                 WLAN_CIPHER_SUITE_CCMP_256,
 788                 WLAN_CIPHER_SUITE_GCMP,
 789                 WLAN_CIPHER_SUITE_GCMP_256,
 790
 791                 /* keep last -- depends on hw flags! */
 792                 WLAN_CIPHER_SUITE_AES_CMAC,
 793                 WLAN_CIPHER_SUITE_BIP_CMAC_256,
 794                 WLAN_CIPHER_SUITE_BIP_GMAC_128,
 795                 WLAN_CIPHER_SUITE_BIP_GMAC_256,
 796         };
 797
 798         if (ieee80211_hw_check(&local->hw, SW_CRYPTO_CONTROL) ||
 799             local->hw.wiphy->cipher_suites) {
 800                 /* If the driver advertises, or doesn't support SW crypto,
 801                  * we only need to remove WEP if necessary.
 802                  */
 803                 if (have_wep)
 804                         return 0;
 805
 806                 /* well if it has _no_ ciphers ... fine */
 807                 if (!local->hw.wiphy->n_cipher_suites)
 808                         return 0;
 809
 810                 /* Driver provides cipher suites, but we need to exclude WEP */
 811                 suites = kmemdup(local->hw.wiphy->cipher_suites,
 812                                  sizeof(u32) * local->hw.wiphy->n_cipher_suites,
 813                                  GFP_KERNEL);
 814                 if (!suites)
 815                         return -ENOMEM;
 816
 817                 for (r = 0; r < local->hw.wiphy->n_cipher_suites; r++) {
 818                         u32 suite = local->hw.wiphy->cipher_suites[r];
 819
 820                         if (suite == WLAN_CIPHER_SUITE_WEP40 ||
 821                             suite == WLAN_CIPHER_SUITE_WEP104)
 822                                 continue;
 823                         suites[w++] = suite;
 824                 }
 825         } else if (!local->hw.cipher_schemes) {
 826                 /* If the driver doesn't have cipher schemes, there's nothing
 827                  * else to do other than assign the (software supported and
 828                  * perhaps offloaded) cipher suites.
 829                  */
 830                 local->hw.wiphy->cipher_suites = cipher_suites;
 831                 local->hw.wiphy->n_cipher_suites = ARRAY_SIZE(cipher_suites);
 832
 833                 if (!have_mfp)
 834                         local->hw.wiphy->n_cipher_suites -= 4;
 835
 836                 if (!have_wep) {
 837                         local->hw.wiphy->cipher_suites += 2;
 838                         local->hw.wiphy->n_cipher_suites -= 2;
 839                 }
 840
 841                 /* not dynamically allocated, so just return */
 842                 return 0;
 843         } else {
 844                 const struct ieee80211_cipher_scheme *cs;
 845
 846                 cs = local->hw.cipher_schemes;
 847
 848                 /* Driver specifies cipher schemes only (but not cipher suites
 849                  * including the schemes)
 850                  *
 851                  * We start counting ciphers defined by schemes, TKIP, CCMP,
 852                  * CCMP-256, GCMP, and GCMP-256
 853                  */
 854                 n_suites = local->hw.n_cipher_schemes + 5;
 855
 856                 /* check if we have WEP40 and WEP104 */
 857                 if (have_wep)
 858                         n_suites += 2;
 859
 860                 /* check if we have AES_CMAC, BIP-CMAC-256, BIP-GMAC-128,
 861                  * BIP-GMAC-256
 862                  */
 863                 if (have_mfp)
 864                         n_suites += 4;
 865
 866                 suites = kmalloc_array(n_suites, sizeof(u32), GFP_KERNEL);
 867                 if (!suites)
 868                         return -ENOMEM;
 869
 870                 suites[w++] = WLAN_CIPHER_SUITE_CCMP;
 871                 suites[w++] = WLAN_CIPHER_SUITE_CCMP_256;
 872                 suites[w++] = WLAN_CIPHER_SUITE_TKIP;
 873                 suites[w++] = WLAN_CIPHER_SUITE_GCMP;
 874                 suites[w++] = WLAN_CIPHER_SUITE_GCMP_256;
 875
 876                 if (have_wep) {
 877                         suites[w++] = WLAN_CIPHER_SUITE_WEP40;
 878                         suites[w++] = WLAN_CIPHER_SUITE_WEP104;
 879                 }
 880
 881                 if (have_mfp) {
 882                         suites[w++] = WLAN_CIPHER_SUITE_AES_CMAC;
 883                         suites[w++] = WLAN_CIPHER_SUITE_BIP_CMAC_256;
 884                         suites[w++] = WLAN_CIPHER_SUITE_BIP_GMAC_128;
 885                         suites[w++] = WLAN_CIPHER_SUITE_BIP_GMAC_256;
 886                 }
 887
 888                 for (r = 0; r < local->hw.n_cipher_schemes; r++) {
 889                         suites[w++] = cs[r].cipher;
 890                         if (WARN_ON(cs[r].pn_len > IEEE80211_MAX_PN_LEN)) {
 891                                 kfree(suites);
 892                                 return -EINVAL;
 893                         }
 894                 }
 895         }
 896
 897         local->hw.wiphy->cipher_suites = suites;
 898         local->hw.wiphy->n_cipher_suites = w;
 899         local->wiphy_ciphers_allocated = true;
 900
 901         return 0;
 902 }
 903
 904 int ieee80211_register_hw(struct ieee80211_hw *hw)
 905 {
 906         struct ieee80211_local *local = hw_to_local(hw);
 907         int result, i;
 908         enum nl80211_band band;
 909         int channels, max_bitrates;
 910         bool supp_ht, supp_vht, supp_he;
 911         struct cfg80211_chan_def dflt_chandef = {};
 912
 913         if (ieee80211_hw_check(hw, QUEUE_CONTROL) &&
 914             (local->hw.offchannel_tx_hw_queue == IEEE80211_INVAL_HW_QUEUE ||
 915              local->hw.offchannel_tx_hw_queue >= local->hw.queues))
 916                 return -EINVAL;
 917
 918         if ((hw->wiphy->features & NL80211_FEATURE_TDLS_CHANNEL_SWITCH) &&
 919             (!local->ops->tdls_channel_switch ||
 920              !local->ops->tdls_cancel_channel_switch ||
 921              !local->ops->tdls_recv_channel_switch))
 922                 return -EOPNOTSUPP;
 923
 924         if (WARN_ON(ieee80211_hw_check(hw, SUPPORTS_TX_FRAG) &&
 925                     !local->ops->set_frag_threshold))
 926                 return -EINVAL;
 927
 928         if (WARN_ON(local->hw.wiphy->interface_modes &
 929                         BIT(NL80211_IFTYPE_NAN) &&
 930                     (!local->ops->start_nan || !local->ops->stop_nan)))
 931                 return -EINVAL;
 932
 933 #ifdef CONFIG_PM
 934         if (hw->wiphy->wowlan && (!local->ops->suspend || !local->ops->resume))
 935                 return -EINVAL;
 936 #endif
 937
 938         if (!local->use_chanctx) {
 939                 for (i = 0; i < local->hw.wiphy->n_iface_combinations; i++) {
 940                         const struct ieee80211_iface_combination *comb;
 941
 942                         comb = &local->hw.wiphy->iface_combinations[i];
 943
 944                         if (comb->num_different_channels > 1)
 945                                 return -EINVAL;
 946                 }
 947         } else {
 948                 /* DFS is not supported with multi-channel combinations yet */
 949                 for (i = 0; i < local->hw.wiphy->n_iface_combinations; i++) {
 950                         const struct ieee80211_iface_combination *comb;
 951
 952                         comb = &local->hw.wiphy->iface_combinations[i];
 953
 954                         if (comb->radar_detect_widths &&
 955                             comb->num_different_channels > 1)
 956                                 return -EINVAL;
 957                 }
 958         }
 959
 960         /* Only HW csum features are currently compatible with mac80211 */
 961         if (WARN_ON(hw->netdev_features & ~MAC80211_SUPPORTED_FEATURES))
 962                 return -EINVAL;
 963
 964         if (hw->max_report_rates == 0)
 965                 hw->max_report_rates = hw->max_rates;
 966
 967         local->rx_chains = 1;
 968
 969         /*
 970          * generic code guarantees at least one band,
 971          * set this very early because much code assumes
 972          * that hw.conf.channel is assigned
 973          */
 974         channels = 0;
 975         max_bitrates = 0;
 976         supp_ht = false;
 977         supp_vht = false;
 978         supp_he = false;
 979         for (band = 0; band < NUM_NL80211_BANDS; band++) {
 980                 struct ieee80211_supported_band *sband;
 981
 982                 sband = local->hw.wiphy->bands[band];
 983                 if (!sband)
 984                         continue;
 985
 986                 if (!dflt_chandef.chan) {
 987                         /*
 988                          * Assign the first enabled channel to dflt_chandef
 989                          * from the list of channels
 990                          */
 991                         for (i = 0; i < sband->n_channels; i++)
 992                                 if (!(sband->channels[i].flags &
 993                                                 IEEE80211_CHAN_DISABLED))
 994                                         break;
 995                         /* if none found then use the first anyway */
 996                         if (i == sband->n_channels)
 997                                 i = 0;
 998                         cfg80211_chandef_create(&dflt_chandef,
 999                                                 &sband->channels[i],
1000                                                 NL80211_CHAN_NO_HT);
1001                         /* init channel we're on */
1002                         if (!local->use_chanctx && !local->_oper_chandef.chan) {
1003                                 local->hw.conf.chandef = dflt_chandef;
1004                                 local->_oper_chandef = dflt_chandef;
1005                         }
1006                         local->monitor_chandef = dflt_chandef;
1007                 }
1008
1009                 channels += sband->n_channels;
1010
1011                 if (max_bitrates < sband->n_bitrates)
1012                         max_bitrates = sband->n_bitrates;
1013                 supp_ht = supp_ht || sband->ht_cap.ht_supported;
1014                 supp_vht = supp_vht || sband->vht_cap.vht_supported;
1015
1016                 for (i = 0; i < sband->n_iftype_data; i++) {
1017                         const struct ieee80211_sband_iftype_data *iftd;
1018
1019                         iftd = &sband->iftype_data[i];
1020
1021                         supp_he = supp_he || (iftd && iftd->he_cap.has_he);
1022                 }
1023
1024                 /* HT, VHT, HE require QoS, thus >= 4 queues */
1025                 if (WARN_ON(local->hw.queues < IEEE80211_NUM_ACS &&
1026                             (supp_ht || supp_vht || supp_he)))
1027                         return -EINVAL;
1028
1029                 if (!sband->ht_cap.ht_supported)
1030                         continue;
1031
1032                 /* TODO: consider VHT for RX chains, hopefully it's the same */
1033                 local->rx_chains =
1034                         max(ieee80211_mcs_to_chains(&sband->ht_cap.mcs),
1035                             local->rx_chains);
1036
1037                 /* no need to mask, SM_PS_DISABLED has all bits set */
1038                 sband->ht_cap.cap |= WLAN_HT_CAP_SM_PS_DISABLED <<
1039                                      IEEE80211_HT_CAP_SM_PS_SHIFT;
1040         }
1041
1042         /* if low-level driver supports AP, we also support VLAN.
1043          * drivers advertising SW_CRYPTO_CONTROL should enable AP_VLAN
1044          * based on their support to transmit SW encrypted packets.
1045          */
1046         if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_AP) &&
1047             !ieee80211_hw_check(&local->hw, SW_CRYPTO_CONTROL)) {
1048                 hw->wiphy->interface_modes |= BIT(NL80211_IFTYPE_AP_VLAN);
1049                 hw->wiphy->software_iftypes |= BIT(NL80211_IFTYPE_AP_VLAN);
1050         }
1051
1052         /* mac80211 always supports monitor */
1053         hw->wiphy->interface_modes |= BIT(NL80211_IFTYPE_MONITOR);
1054         hw->wiphy->software_iftypes |= BIT(NL80211_IFTYPE_MONITOR);
1055
1056         /* mac80211 doesn't support more than one IBSS interface right now */
1057         for (i = 0; i < hw->wiphy->n_iface_combinations; i++) {
1058                 const struct ieee80211_iface_combination *c;
1059                 int j;
1060
1061                 c = &hw->wiphy->iface_combinations[i];
1062
1063                 for (j = 0; j < c->n_limits; j++)
1064                         if ((c->limits[j].types & BIT(NL80211_IFTYPE_ADHOC)) &&
1065                             c->limits[j].max > 1)
1066                                 return -EINVAL;
1067         }
1068
1069         local->int_scan_req = kzalloc(sizeof(*local->int_scan_req) +
1070                                       sizeof(void *) * channels, GFP_KERNEL);
1071         if (!local->int_scan_req)
1072                 return -ENOMEM;
1073
1074         for (band = 0; band < NUM_NL80211_BANDS; band++) {
1075                 if (!local->hw.wiphy->bands[band])
1076                         continue;
1077                 local->int_scan_req->rates[band] = (u32) -1;
1078         }
1079
1080 #ifndef CONFIG_MAC80211_MESH
1081         /* mesh depends on Kconfig, but drivers should set it if they want */
1082         local->hw.wiphy->interface_modes &= ~BIT(NL80211_IFTYPE_MESH_POINT);
1083 #endif
1084
1085         /* if the underlying driver supports mesh, mac80211 will (at least)
1086          * provide routing of mesh authentication frames to userspace */
1087         if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_MESH_POINT))
1088                 local->hw.wiphy->flags |= WIPHY_FLAG_MESH_AUTH;
1089
1090         /* mac80211 supports control port protocol changing */
1091         local->hw.wiphy->flags |= WIPHY_FLAG_CONTROL_PORT_PROTOCOL;
1092
1093         if (ieee80211_hw_check(&local->hw, SIGNAL_DBM)) {
1094                 local->hw.wiphy->signal_type = CFG80211_SIGNAL_TYPE_MBM;
1095         } else if (ieee80211_hw_check(&local->hw, SIGNAL_UNSPEC)) {
1096                 local->hw.wiphy->signal_type = CFG80211_SIGNAL_TYPE_UNSPEC;
1097                 if (hw->max_signal <= 0) {
1098                         result = -EINVAL;
1099                         goto fail_workqueue;
1100                 }
1101         }
1102
1103         /* Mac80211 and therefore all drivers using SW crypto only
1104          * are able to handle PTK rekeys and Extended Key ID.
1105          */
1106         if (!local->ops->set_key) {
1107                 wiphy_ext_feature_set(local->hw.wiphy,
1108                                       NL80211_EXT_FEATURE_CAN_REPLACE_PTK0);
1109                 wiphy_ext_feature_set(local->hw.wiphy,
1110                                       NL80211_EXT_FEATURE_EXT_KEY_ID);
1111         }
1112
1113         if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_ADHOC))
1114                 wiphy_ext_feature_set(local->hw.wiphy,
1115                                       NL80211_EXT_FEATURE_DEL_IBSS_STA);
1116
1117         /*
1118          * Calculate scan IE length -- we need this to alloc
1119          * memory and to subtract from the driver limit. It
1120          * includes the DS Params, (extended) supported rates, and HT
1121          * information -- SSID is the driver's responsibility.
1122          */
1123         local->scan_ies_len = 4 + max_bitrates /* (ext) supp rates */ +
1124                 3 /* DS Params */;
1125         if (supp_ht)
1126                 local->scan_ies_len += 2 + sizeof(struct ieee80211_ht_cap);
1127
1128         if (supp_vht)
1129                 local->scan_ies_len +=
1130                         2 + sizeof(struct ieee80211_vht_cap);
1131
1132         /* HE cap element is variable in size - set len to allow max size */
1133         /*
1134          * TODO: 1 is added at the end of the calculation to accommodate for
1135          *      the temporary placing of the HE capabilities IE under EXT.
1136          *      Remove it once it is placed in the final place.
1137          */
1138         if (supp_he)
1139                 local->scan_ies_len +=
1140                         2 + sizeof(struct ieee80211_he_cap_elem) +
1141                         sizeof(struct ieee80211_he_mcs_nss_supp) +
1142                         IEEE80211_HE_PPE_THRES_MAX_LEN + 1;
1143
1144         if (!local->ops->hw_scan) {
1145                 /* For hw_scan, driver needs to set these up. */
1146                 local->hw.wiphy->max_scan_ssids = 4;
1147                 local->hw.wiphy->max_scan_ie_len = IEEE80211_MAX_DATA_LEN;
1148         }
1149
1150         /*
1151          * If the driver supports any scan IEs, then assume the
1152          * limit includes the IEs mac80211 will add, otherwise
1153          * leave it at zero and let the driver sort it out; we
1154          * still pass our IEs to the driver but userspace will
1155          * not be allowed to in that case.
1156          */
1157         if (local->hw.wiphy->max_scan_ie_len)
1158                 local->hw.wiphy->max_scan_ie_len -= local->scan_ies_len;
1159
1160         if (WARN_ON(!ieee80211_cs_list_valid(local->hw.cipher_schemes,
1161                                              local->hw.n_cipher_schemes))) {
1162                 result = -EINVAL;
1163                 goto fail_workqueue;
1164         }
1165
1166         result = ieee80211_init_cipher_suites(local);
1167         if (result < 0)
1168                 goto fail_workqueue;
1169
1170         if (!local->ops->remain_on_channel)
1171                 local->hw.wiphy->max_remain_on_channel_duration = 5000;
1172
1173         /* mac80211 based drivers don't support internal TDLS setup */
1174         if (local->hw.wiphy->flags & WIPHY_FLAG_SUPPORTS_TDLS)
1175                 local->hw.wiphy->flags |= WIPHY_FLAG_TDLS_EXTERNAL_SETUP;
1176
1177         /* mac80211 supports eCSA, if the driver supports STA CSA at all */
1178         if (ieee80211_hw_check(&local->hw, CHANCTX_STA_CSA))
1179                 local->ext_capa[0] |= WLAN_EXT_CAPA1_EXT_CHANNEL_SWITCHING;
1180
1181         /* mac80211 supports multi BSSID, if the driver supports it */
1182         if (ieee80211_hw_check(&local->hw, SUPPORTS_MULTI_BSSID)) {
1183                 local->hw.wiphy->support_mbssid = true;
1184                 if (ieee80211_hw_check(&local->hw,
1185                                        SUPPORTS_ONLY_HE_MULTI_BSSID))
1186                         local->hw.wiphy->support_only_he_mbssid = true;
1187                 else
1188                         local->ext_capa[2] |=
1189                                 WLAN_EXT_CAPA3_MULTI_BSSID_SUPPORT;
1190         }
1191
1192         local->hw.wiphy->max_num_csa_counters = IEEE80211_MAX_CNTDWN_COUNTERS_NUM;
1193
1194         /*
1195          * We use the number of queues for feature tests (QoS, HT) internally
1196          * so restrict them appropriately.
1197          */
1198         if (hw->queues > IEEE80211_MAX_QUEUES)
1199                 hw->queues = IEEE80211_MAX_QUEUES;
1200
1201         local->workqueue =
1202                 alloc_ordered_workqueue("%s", 0, wiphy_name(local->hw.wiphy));
1203         if (!local->workqueue) {
1204                 result = -ENOMEM;
1205                 goto fail_workqueue;
1206         }
1207
1208         /*
1209          * The hardware needs headroom for sending the frame,
1210          * and we need some headroom for passing the frame to monitor
1211          * interfaces, but never both at the same time.
1212          */
1213         local->tx_headroom = max_t(unsigned int , local->hw.extra_tx_headroom,
1214                                    IEEE80211_TX_STATUS_HEADROOM);
1215
1216         /*
1217          * if the driver doesn't specify a max listen interval we
1218          * use 5 which should be a safe default
1219          */
1220         if (local->hw.max_listen_interval == 0)
1221                 local->hw.max_listen_interval = 5;
1222
1223         local->hw.conf.listen_interval = local->hw.max_listen_interval;
1224
1225         local->dynamic_ps_forced_timeout = -1;
1226
1227         if (!local->hw.max_nan_de_entries)
1228                 local->hw.max_nan_de_entries = IEEE80211_MAX_NAN_INSTANCE_ID;
1229
1230         if (!local->hw.weight_multiplier)
1231                 local->hw.weight_multiplier = 1;
1232
1233         ieee80211_wep_init(local);
1234
1235         local->hw.conf.flags = IEEE80211_CONF_IDLE;
1236
1237         ieee80211_led_init(local);
1238
1239         result = ieee80211_txq_setup_flows(local);
1240         if (result)
1241                 goto fail_flows;
1242
1243         rtnl_lock();
1244         result = ieee80211_init_rate_ctrl_alg(local,
1245                                               hw->rate_control_algorithm);
1246         rtnl_unlock();
1247         if (result < 0) {
1248                 wiphy_debug(local->hw.wiphy,
1249                             "Failed to initialize rate control algorithm\n");
1250                 goto fail_rate;
1251         }
1252
1253         if (local->rate_ctrl) {
1254                 clear_bit(IEEE80211_HW_SUPPORTS_VHT_EXT_NSS_BW, hw->flags);
1255                 if (local->rate_ctrl->ops->capa & RATE_CTRL_CAPA_VHT_EXT_NSS_BW)
1256                         ieee80211_hw_set(hw, SUPPORTS_VHT_EXT_NSS_BW);
1257         }
1258
1259         /*
1260          * If the VHT capabilities don't have IEEE80211_VHT_EXT_NSS_BW_CAPABLE,
1261          * or have it when we don't, copy the sband structure and set/clear it.
1262          * This is necessary because rate scaling algorithms could be switched
1263          * and have different support values.
1264          * Print a message so that in the common case the reallocation can be
1265          * avoided.
1266          */
1267         BUILD_BUG_ON(NUM_NL80211_BANDS > 8 * sizeof(local->sband_allocated));
1268         for (band = 0; band < NUM_NL80211_BANDS; band++) {
1269                 struct ieee80211_supported_band *sband;
1270                 bool local_cap, ie_cap;
1271
1272                 local_cap = ieee80211_hw_check(hw, SUPPORTS_VHT_EXT_NSS_BW);
1273
1274                 sband = local->hw.wiphy->bands[band];
1275                 if (!sband || !sband->vht_cap.vht_supported)
1276                         continue;
1277
1278                 ie_cap = !!(sband->vht_cap.vht_mcs.tx_highest &
1279                             cpu_to_le16(IEEE80211_VHT_EXT_NSS_BW_CAPABLE));
1280
1281                 if (local_cap == ie_cap)
1282                         continue;
1283
1284                 sband = kmemdup(sband, sizeof(*sband), GFP_KERNEL);
1285                 if (!sband) {
1286                         result = -ENOMEM;
1287                         goto fail_rate;
1288                 }
1289
1290                 wiphy_dbg(hw->wiphy, "copying sband (band %d) due to VHT EXT NSS BW flag\n",
1291                           band);
1292
1293                 sband->vht_cap.vht_mcs.tx_highest ^=
1294                         cpu_to_le16(IEEE80211_VHT_EXT_NSS_BW_CAPABLE);
1295
1296                 local->hw.wiphy->bands[band] = sband;
1297                 local->sband_allocated |= BIT(band);
1298         }
1299
1300         result = wiphy_register(local->hw.wiphy);
1301         if (result < 0)
1302                 goto fail_wiphy_register;
1303
1304         debugfs_hw_add(local);
1305         rate_control_add_debugfs(local);
1306
1307         rtnl_lock();
1308         wiphy_lock(hw->wiphy);
1309
1310         /* add one default STA interface if supported */
1311         if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_STATION) &&
1312             !ieee80211_hw_check(hw, NO_AUTO_VIF)) {
1313                 struct vif_params params = {0};
1314
1315                 result = ieee80211_if_add(local, "wlan%d", NET_NAME_ENUM, NULL,
1316                                           NL80211_IFTYPE_STATION, &params);
1317                 if (result)
1318                         wiphy_warn(local->hw.wiphy,
1319                                    "Failed to add default virtual iface\n");
1320         }
1321
1322         wiphy_unlock(hw->wiphy);
1323         rtnl_unlock();
1324
1325 #ifdef CONFIG_INET
1326         local->ifa_notifier.notifier_call = ieee80211_ifa_changed;
1327         result = register_inetaddr_notifier(&local->ifa_notifier);
1328         if (result)
1329                 goto fail_ifa;
1330 #endif
1331
1332 #if IS_ENABLED(CONFIG_IPV6)
1333         local->ifa6_notifier.notifier_call = ieee80211_ifa6_changed;
1334         result = register_inet6addr_notifier(&local->ifa6_notifier);
1335         if (result)
1336                 goto fail_ifa6;
1337 #endif
1338
1339         return 0;
1340
1341 #if IS_ENABLED(CONFIG_IPV6)
1342  fail_ifa6:
1343 #ifdef CONFIG_INET
1344         unregister_inetaddr_notifier(&local->ifa_notifier);
1345 #endif
1346 #endif
1347 #if defined(CONFIG_INET) || defined(CONFIG_IPV6)
1348  fail_ifa:
1349 #endif
1350         wiphy_unregister(local->hw.wiphy);
1351  fail_wiphy_register:
1352         rtnl_lock();
1353         rate_control_deinitialize(local);
1354         ieee80211_remove_interfaces(local);
1355         rtnl_unlock();
1356  fail_rate:
1357  fail_flows:
1358         ieee80211_led_exit(local);
1359         destroy_workqueue(local->workqueue);
1360  fail_workqueue:
1361         if (local->wiphy_ciphers_allocated)
1362                 kfree(local->hw.wiphy->cipher_suites);
1363         kfree(local->int_scan_req);
1364         return result;
1365 }
1366 EXPORT_SYMBOL(ieee80211_register_hw);
1367
1368 void ieee80211_unregister_hw(struct ieee80211_hw *hw)
1369 {
1370         struct ieee80211_local *local = hw_to_local(hw);
1371
1372         tasklet_kill(&local->tx_pending_tasklet);
1373         tasklet_kill(&local->tasklet);
1374
1375 #ifdef CONFIG_INET
1376         unregister_inetaddr_notifier(&local->ifa_notifier);
1377 #endif
1378 #if IS_ENABLED(CONFIG_IPV6)
1379         unregister_inet6addr_notifier(&local->ifa6_notifier);
1380 #endif
1381
1382         rtnl_lock();
1383
1384         /*
1385          * At this point, interface list manipulations are fine
1386          * because the driver cannot be handing us frames any
1387          * more and the tasklet is killed.
1388          */
1389         ieee80211_remove_interfaces(local);
1390
1391         rtnl_unlock();
1392
1393         cancel_delayed_work_sync(&local->roc_work);
1394         cancel_work_sync(&local->restart_work);
1395         cancel_work_sync(&local->reconfig_filter);
1396         flush_work(&local->sched_scan_stopped_work);
1397         flush_work(&local->radar_detected_work);
1398
1399         ieee80211_clear_tx_pending(local);
1400         rate_control_deinitialize(local);
1401
1402         if (skb_queue_len(&local->skb_queue) ||
1403             skb_queue_len(&local->skb_queue_unreliable))
1404                 wiphy_warn(local->hw.wiphy, "skb_queue not empty\n");
1405         skb_queue_purge(&local->skb_queue);
1406         skb_queue_purge(&local->skb_queue_unreliable);
1407
1408         wiphy_unregister(local->hw.wiphy);
1409         destroy_workqueue(local->workqueue);
1410         ieee80211_led_exit(local);
1411         kfree(local->int_scan_req);
1412 }
1413 EXPORT_SYMBOL(ieee80211_unregister_hw);
1414
1415 static int ieee80211_free_ack_frame(int id, void *p, void *data)
1416 {
1417         WARN_ONCE(1, "Have pending ack frames!\n");
1418         kfree_skb(p);
1419         return 0;
1420 }
1421
1422 void ieee80211_free_hw(struct ieee80211_hw *hw)
1423 {
1424         struct ieee80211_local *local = hw_to_local(hw);
1425         enum nl80211_band band;
1426
1427         mutex_destroy(&local->iflist_mtx);
1428         mutex_destroy(&local->mtx);
1429
1430         if (local->wiphy_ciphers_allocated)
1431                 kfree(local->hw.wiphy->cipher_suites);
1432
1433         idr_for_each(&local->ack_status_frames,
1434                      ieee80211_free_ack_frame, NULL);
1435         idr_destroy(&local->ack_status_frames);
1436
1437         sta_info_stop(local);
1438
1439         ieee80211_free_led_names(local);
1440
1441         for (band = 0; band < NUM_NL80211_BANDS; band++) {
1442                 if (!(local->sband_allocated & BIT(band)))
1443                         continue;
1444                 kfree(local->hw.wiphy->bands[band]);
1445         }
1446
1447         wiphy_free(local->hw.wiphy);
1448 }
1449 EXPORT_SYMBOL(ieee80211_free_hw);
1450
1451 static int __init ieee80211_init(void)
1452 {
1453         struct sk_buff *skb;
1454         int ret;
1455
1456         BUILD_BUG_ON(sizeof(struct ieee80211_tx_info) > sizeof(skb->cb));
1457         BUILD_BUG_ON(offsetof(struct ieee80211_tx_info, driver_data) +
1458                      IEEE80211_TX_INFO_DRIVER_DATA_SIZE > sizeof(skb->cb));
1459
1460         ret = rc80211_minstrel_init();
1461         if (ret)
1462                 return ret;
1463
1464         ret = ieee80211_iface_init();
1465         if (ret)
1466                 goto err_netdev;
1467
1468         return 0;
1469  err_netdev:
1470         rc80211_minstrel_exit();
1471
1472         return ret;
1473 }
1474
1475 static void __exit ieee80211_exit(void)
1476 {
1477         rc80211_minstrel_exit();
1478
1479         ieee80211s_stop();
1480
1481         ieee80211_iface_exit();
1482
1483         rcu_barrier();
1484 }
1485
1486
1487 subsys_initcall(ieee80211_init);
1488 module_exit(ieee80211_exit);
1489
1490 MODULE_DESCRIPTION("IEEE 802.11 subsystem");
1491 MODULE_LICENSE("GPL");