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
 261         WARN(test_bit(SCAN_HW_SCANNING, &local->scanning),
 262              "%s called with hardware scan in progress\n", __func__);
 263
 264         flush_work(&local->radar_detected_work);
 265         /* we might do interface manipulations, so need both */
 266         rtnl_lock();
 267         wiphy_lock(local->hw.wiphy);
 268         list_for_each_entry(sdata, &local->interfaces, list) {
 269                 /*
 270                  * XXX: there may be more work for other vif types and even
 271                  * for station mode: a good thing would be to run most of
 272                  * the iface type's dependent _stop (ieee80211_mg_stop,
 273                  * ieee80211_ibss_stop) etc...
 274                  * For now, fix only the specific bug that was seen: race
 275                  * between csa_connection_drop_work and us.
 276                  */
 277                 if (sdata->vif.type == NL80211_IFTYPE_STATION) {
 278                         /*
 279                          * This worker is scheduled from the iface worker that
 280                          * runs on mac80211's workqueue, so we can't be
 281                          * scheduling this worker after the cancel right here.
 282                          * The exception is ieee80211_chswitch_done.
 283                          * Then we can have a race...
 284                          */
 285                         cancel_work_sync(&sdata->u.mgd.csa_connection_drop_work);
 286                         if (sdata->vif.csa_active) {
 287                                 sdata_lock(sdata);
 288                                 ieee80211_sta_connection_lost(sdata,
 289                                                               sdata->u.mgd.associated->bssid,
 290                                                               WLAN_REASON_UNSPECIFIED, false);
 291                                 sdata_unlock(sdata);
 292                         }
 293                 }
 294                 flush_delayed_work(&sdata->dec_tailroom_needed_wk);
 295         }
 296         ieee80211_scan_cancel(local);
 297
 298         /* make sure any new ROC will consider local->in_reconfig */
 299         flush_delayed_work(&local->roc_work);
 300         flush_work(&local->hw_roc_done);
 301
 302         /* wait for all packet processing to be done */
 303         synchronize_net();
 304
 305         ret = ieee80211_reconfig(local);
 306         wiphy_unlock(local->hw.wiphy);
 307
 308         if (ret)
 309                 cfg80211_shutdown_all_interfaces(local->hw.wiphy);
 310
 311         rtnl_unlock();
 312 }
 313
 314 void ieee80211_restart_hw(struct ieee80211_hw *hw)
 315 {
 316         struct ieee80211_local *local = hw_to_local(hw);
 317
 318         trace_api_restart_hw(local);
 319
 320         wiphy_info(hw->wiphy,
 321                    "Hardware restart was requested\n");
 322
 323         /* use this reason, ieee80211_reconfig will unblock it */
 324         ieee80211_stop_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP,
 325                                         IEEE80211_QUEUE_STOP_REASON_SUSPEND,
 326                                         false);
 327
 328         /*
 329          * Stop all Rx during the reconfig. We don't want state changes
 330          * or driver callbacks while this is in progress.
 331          */
 332         local->in_reconfig = true;
 333         barrier();
 334
 335         queue_work(system_freezable_wq, &local->restart_work);
 336 }
 337 EXPORT_SYMBOL(ieee80211_restart_hw);
 338
 339 #ifdef CONFIG_INET
 340 static int ieee80211_ifa_changed(struct notifier_block *nb,
 341                                  unsigned long data, void *arg)
 342 {
 343         struct in_ifaddr *ifa = arg;
 344         struct ieee80211_local *local =
 345                 container_of(nb, struct ieee80211_local,
 346                              ifa_notifier);
 347         struct net_device *ndev = ifa->ifa_dev->dev;
 348         struct wireless_dev *wdev = ndev->ieee80211_ptr;
 349         struct in_device *idev;
 350         struct ieee80211_sub_if_data *sdata;
 351         struct ieee80211_bss_conf *bss_conf;
 352         struct ieee80211_if_managed *ifmgd;
 353         int c = 0;
 354
 355         /* Make sure it's our interface that got changed */
 356         if (!wdev)
 357                 return NOTIFY_DONE;
 358
 359         if (wdev->wiphy != local->hw.wiphy)
 360                 return NOTIFY_DONE;
 361
 362         sdata = IEEE80211_DEV_TO_SUB_IF(ndev);
 363         bss_conf = &sdata->vif.bss_conf;
 364
 365         /* ARP filtering is only supported in managed mode */
 366         if (sdata->vif.type != NL80211_IFTYPE_STATION)
 367                 return NOTIFY_DONE;
 368
 369         idev = __in_dev_get_rtnl(sdata->dev);
 370         if (!idev)
 371                 return NOTIFY_DONE;
 372
 373         ifmgd = &sdata->u.mgd;
 374         sdata_lock(sdata);
 375
 376         /* Copy the addresses to the bss_conf list */
 377         ifa = rtnl_dereference(idev->ifa_list);
 378         while (ifa) {
 379                 if (c < IEEE80211_BSS_ARP_ADDR_LIST_LEN)
 380                         bss_conf->arp_addr_list[c] = ifa->ifa_address;
 381                 ifa = rtnl_dereference(ifa->ifa_next);
 382                 c++;
 383         }
 384
 385         bss_conf->arp_addr_cnt = c;
 386
 387         /* Configure driver only if associated (which also implies it is up) */
 388         if (ifmgd->associated)
 389                 ieee80211_bss_info_change_notify(sdata,
 390                                                  BSS_CHANGED_ARP_FILTER);
 391
 392         sdata_unlock(sdata);
 393
 394         return NOTIFY_OK;
 395 }
 396 #endif
 397
 398 #if IS_ENABLED(CONFIG_IPV6)
 399 static int ieee80211_ifa6_changed(struct notifier_block *nb,
 400                                   unsigned long data, void *arg)
 401 {
 402         struct inet6_ifaddr *ifa = (struct inet6_ifaddr *)arg;
 403         struct inet6_dev *idev = ifa->idev;
 404         struct net_device *ndev = ifa->idev->dev;
 405         struct ieee80211_local *local =
 406                 container_of(nb, struct ieee80211_local, ifa6_notifier);
 407         struct wireless_dev *wdev = ndev->ieee80211_ptr;
 408         struct ieee80211_sub_if_data *sdata;
 409
 410         /* Make sure it's our interface that got changed */
 411         if (!wdev || wdev->wiphy != local->hw.wiphy)
 412                 return NOTIFY_DONE;
 413
 414         sdata = IEEE80211_DEV_TO_SUB_IF(ndev);
 415
 416         /*
 417          * For now only support station mode. This is mostly because
 418          * doing AP would have to handle AP_VLAN in some way ...
 419          */
 420         if (sdata->vif.type != NL80211_IFTYPE_STATION)
 421                 return NOTIFY_DONE;
 422
 423         drv_ipv6_addr_change(local, sdata, idev);
 424
 425         return NOTIFY_OK;
 426 }
 427 #endif
 428
 429 /* There isn't a lot of sense in it, but you can transmit anything you like */
 430 static const struct ieee80211_txrx_stypes
 431 ieee80211_default_mgmt_stypes[NUM_NL80211_IFTYPES] = {
 432         [NL80211_IFTYPE_ADHOC] = {
 433                 .tx = 0xffff,
 434                 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
 435                         BIT(IEEE80211_STYPE_AUTH >> 4) |
 436                         BIT(IEEE80211_STYPE_DEAUTH >> 4) |
 437                         BIT(IEEE80211_STYPE_PROBE_REQ >> 4),
 438         },
 439         [NL80211_IFTYPE_STATION] = {
 440                 .tx = 0xffff,
 441                 /*
 442                  * To support Pre Association Security Negotiation (PASN) while
 443                  * already associated to one AP, allow user space to register to
 444                  * Rx authentication frames, so that the user space logic would
 445                  * be able to receive/handle authentication frames from a
 446                  * different AP as part of PASN.
 447                  * It is expected that user space would intelligently register
 448                  * for Rx authentication frames, i.e., only when PASN is used
 449                  * and configure a match filter only for PASN authentication
 450                  * algorithm, as otherwise the MLME functionality of mac80211
 451                  * would be broken.
 452                  */
 453                 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
 454                         BIT(IEEE80211_STYPE_AUTH >> 4) |
 455                         BIT(IEEE80211_STYPE_PROBE_REQ >> 4),
 456         },
 457         [NL80211_IFTYPE_AP] = {
 458                 .tx = 0xffff,
 459                 .rx = BIT(IEEE80211_STYPE_ASSOC_REQ >> 4) |
 460                         BIT(IEEE80211_STYPE_REASSOC_REQ >> 4) |
 461                         BIT(IEEE80211_STYPE_PROBE_REQ >> 4) |
 462                         BIT(IEEE80211_STYPE_DISASSOC >> 4) |
 463                         BIT(IEEE80211_STYPE_AUTH >> 4) |
 464                         BIT(IEEE80211_STYPE_DEAUTH >> 4) |
 465                         BIT(IEEE80211_STYPE_ACTION >> 4),
 466         },
 467         [NL80211_IFTYPE_AP_VLAN] = {
 468                 /* copy AP */
 469                 .tx = 0xffff,
 470                 .rx = BIT(IEEE80211_STYPE_ASSOC_REQ >> 4) |
 471                         BIT(IEEE80211_STYPE_REASSOC_REQ >> 4) |
 472                         BIT(IEEE80211_STYPE_PROBE_REQ >> 4) |
 473                         BIT(IEEE80211_STYPE_DISASSOC >> 4) |
 474                         BIT(IEEE80211_STYPE_AUTH >> 4) |
 475                         BIT(IEEE80211_STYPE_DEAUTH >> 4) |
 476                         BIT(IEEE80211_STYPE_ACTION >> 4),
 477         },
 478         [NL80211_IFTYPE_P2P_CLIENT] = {
 479                 .tx = 0xffff,
 480                 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
 481                         BIT(IEEE80211_STYPE_PROBE_REQ >> 4),
 482         },
 483         [NL80211_IFTYPE_P2P_GO] = {
 484                 .tx = 0xffff,
 485                 .rx = BIT(IEEE80211_STYPE_ASSOC_REQ >> 4) |
 486                         BIT(IEEE80211_STYPE_REASSOC_REQ >> 4) |
 487                         BIT(IEEE80211_STYPE_PROBE_REQ >> 4) |
 488                         BIT(IEEE80211_STYPE_DISASSOC >> 4) |
 489                         BIT(IEEE80211_STYPE_AUTH >> 4) |
 490                         BIT(IEEE80211_STYPE_DEAUTH >> 4) |
 491                         BIT(IEEE80211_STYPE_ACTION >> 4),
 492         },
 493         [NL80211_IFTYPE_MESH_POINT] = {
 494                 .tx = 0xffff,
 495                 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
 496                         BIT(IEEE80211_STYPE_AUTH >> 4) |
 497                         BIT(IEEE80211_STYPE_DEAUTH >> 4),
 498         },
 499         [NL80211_IFTYPE_P2P_DEVICE] = {
 500                 .tx = 0xffff,
 501                 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
 502                         BIT(IEEE80211_STYPE_PROBE_REQ >> 4),
 503         },
 504 };
 505
 506 static const struct ieee80211_ht_cap mac80211_ht_capa_mod_mask = {
 507         .ampdu_params_info = IEEE80211_HT_AMPDU_PARM_FACTOR |
 508                              IEEE80211_HT_AMPDU_PARM_DENSITY,
 509
 510         .cap_info = cpu_to_le16(IEEE80211_HT_CAP_SUP_WIDTH_20_40 |
 511                                 IEEE80211_HT_CAP_MAX_AMSDU |
 512                                 IEEE80211_HT_CAP_SGI_20 |
 513                                 IEEE80211_HT_CAP_SGI_40 |
 514                                 IEEE80211_HT_CAP_TX_STBC |
 515                                 IEEE80211_HT_CAP_RX_STBC |
 516                                 IEEE80211_HT_CAP_LDPC_CODING |
 517                                 IEEE80211_HT_CAP_40MHZ_INTOLERANT),
 518         .mcs = {
 519                 .rx_mask = { 0xff, 0xff, 0xff, 0xff, 0xff,
 520                              0xff, 0xff, 0xff, 0xff, 0xff, },
 521         },
 522 };
 523
 524 static const struct ieee80211_vht_cap mac80211_vht_capa_mod_mask = {
 525         .vht_cap_info =
 526                 cpu_to_le32(IEEE80211_VHT_CAP_RXLDPC |
 527                             IEEE80211_VHT_CAP_SHORT_GI_80 |
 528                             IEEE80211_VHT_CAP_SHORT_GI_160 |
 529                             IEEE80211_VHT_CAP_RXSTBC_MASK |
 530                             IEEE80211_VHT_CAP_TXSTBC |
 531                             IEEE80211_VHT_CAP_SU_BEAMFORMER_CAPABLE |
 532                             IEEE80211_VHT_CAP_SU_BEAMFORMEE_CAPABLE |
 533                             IEEE80211_VHT_CAP_TX_ANTENNA_PATTERN |
 534                             IEEE80211_VHT_CAP_RX_ANTENNA_PATTERN |
 535                             IEEE80211_VHT_CAP_MAX_A_MPDU_LENGTH_EXPONENT_MASK),
 536         .supp_mcs = {
 537                 .rx_mcs_map = cpu_to_le16(~0),
 538                 .tx_mcs_map = cpu_to_le16(~0),
 539         },
 540 };
 541
 542 struct ieee80211_hw *ieee80211_alloc_hw_nm(size_t priv_data_len,
 543                                            const struct ieee80211_ops *ops,
 544                                            const char *requested_name)
 545 {
 546         struct ieee80211_local *local;
 547         int priv_size, i;
 548         struct wiphy *wiphy;
 549         bool use_chanctx;
 550
 551         if (WARN_ON(!ops->tx || !ops->start || !ops->stop || !ops->config ||
 552                     !ops->add_interface || !ops->remove_interface ||
 553                     !ops->configure_filter))
 554                 return NULL;
 555
 556         if (WARN_ON(ops->sta_state && (ops->sta_add || ops->sta_remove)))
 557                 return NULL;
 558
 559         /* check all or no channel context operations exist */
 560         i = !!ops->add_chanctx + !!ops->remove_chanctx +
 561             !!ops->change_chanctx + !!ops->assign_vif_chanctx +
 562             !!ops->unassign_vif_chanctx;
 563         if (WARN_ON(i != 0 && i != 5))
 564                 return NULL;
 565         use_chanctx = i == 5;
 566
 567         /* Ensure 32-byte alignment of our private data and hw private data.
 568          * We use the wiphy priv data for both our ieee80211_local and for
 569          * the driver's private data
 570          *
 571          * In memory it'll be like this:
 572          *
 573          * +-------------------------+
 574          * | struct wiphy           |
 575          * +-------------------------+
 576          * | struct ieee80211_local  |
 577          * +-------------------------+
 578          * | driver's private data   |
 579          * +-------------------------+
 580          *
 581          */
 582         priv_size = ALIGN(sizeof(*local), NETDEV_ALIGN) + priv_data_len;
 583
 584         wiphy = wiphy_new_nm(&mac80211_config_ops, priv_size, requested_name);
 585
 586         if (!wiphy)
 587                 return NULL;
 588
 589         wiphy->mgmt_stypes = ieee80211_default_mgmt_stypes;
 590
 591         wiphy->privid = mac80211_wiphy_privid;
 592
 593         wiphy->flags |= WIPHY_FLAG_NETNS_OK |
 594                         WIPHY_FLAG_4ADDR_AP |
 595                         WIPHY_FLAG_4ADDR_STATION |
 596                         WIPHY_FLAG_REPORTS_OBSS |
 597                         WIPHY_FLAG_OFFCHAN_TX;
 598
 599         if (!use_chanctx || ops->remain_on_channel)
 600                 wiphy->flags |= WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL;
 601
 602         wiphy->features |= NL80211_FEATURE_SK_TX_STATUS |
 603                            NL80211_FEATURE_SAE |
 604                            NL80211_FEATURE_HT_IBSS |
 605                            NL80211_FEATURE_VIF_TXPOWER |
 606                            NL80211_FEATURE_MAC_ON_CREATE |
 607                            NL80211_FEATURE_USERSPACE_MPM |
 608                            NL80211_FEATURE_FULL_AP_CLIENT_STATE;
 609         wiphy_ext_feature_set(wiphy, NL80211_EXT_FEATURE_FILS_STA);
 610         wiphy_ext_feature_set(wiphy,
 611                               NL80211_EXT_FEATURE_CONTROL_PORT_OVER_NL80211);
 612         wiphy_ext_feature_set(wiphy,
 613                               NL80211_EXT_FEATURE_CONTROL_PORT_NO_PREAUTH);
 614         wiphy_ext_feature_set(wiphy,
 615                               NL80211_EXT_FEATURE_CONTROL_PORT_OVER_NL80211_TX_STATUS);
 616         wiphy_ext_feature_set(wiphy,
 617                               NL80211_EXT_FEATURE_SCAN_FREQ_KHZ);
 618
 619         if (!ops->hw_scan) {
 620                 wiphy->features |= NL80211_FEATURE_LOW_PRIORITY_SCAN |
 621                                    NL80211_FEATURE_AP_SCAN;
 622                 /*
 623                  * if the driver behaves correctly using the probe request
 624                  * (template) from mac80211, then both of these should be
 625                  * supported even with hw scan - but let drivers opt in.
 626                  */
 627                 wiphy_ext_feature_set(wiphy,
 628                                       NL80211_EXT_FEATURE_SCAN_RANDOM_SN);
 629                 wiphy_ext_feature_set(wiphy,
 630                                       NL80211_EXT_FEATURE_SCAN_MIN_PREQ_CONTENT);
 631         }
 632
 633         if (!ops->set_key)
 634                 wiphy->flags |= WIPHY_FLAG_IBSS_RSN;
 635
 636         if (ops->wake_tx_queue)
 637                 wiphy_ext_feature_set(wiphy, NL80211_EXT_FEATURE_TXQS);
 638
 639         wiphy_ext_feature_set(wiphy, NL80211_EXT_FEATURE_RRM);
 640
 641         wiphy->bss_priv_size = sizeof(struct ieee80211_bss);
 642
 643         local = wiphy_priv(wiphy);
 644
 645         if (sta_info_init(local))
 646                 goto err_free;
 647
 648         local->hw.wiphy = wiphy;
 649
 650         local->hw.priv = (char *)local + ALIGN(sizeof(*local), NETDEV_ALIGN);
 651
 652         local->ops = ops;
 653         local->use_chanctx = use_chanctx;
 654
 655         /*
 656          * We need a bit of data queued to build aggregates properly, so
 657          * instruct the TCP stack to allow more than a single ms of data
 658          * to be queued in the stack. The value is a bit-shift of 1
 659          * second, so 7 is ~8ms of queued data. Only affects local TCP
 660          * sockets.
 661          * This is the default, anyhow - drivers may need to override it
 662          * for local reasons (longer buffers, longer completion time, or
 663          * similar).
 664          */
 665         local->hw.tx_sk_pacing_shift = 7;
 666
 667         /* set up some defaults */
 668         local->hw.queues = 1;
 669         local->hw.max_rates = 1;
 670         local->hw.max_report_rates = 0;
 671         local->hw.max_rx_aggregation_subframes = IEEE80211_MAX_AMPDU_BUF_HT;
 672         local->hw.max_tx_aggregation_subframes = IEEE80211_MAX_AMPDU_BUF_HT;
 673         local->hw.offchannel_tx_hw_queue = IEEE80211_INVAL_HW_QUEUE;
 674         local->hw.conf.long_frame_max_tx_count = wiphy->retry_long;
 675         local->hw.conf.short_frame_max_tx_count = wiphy->retry_short;
 676         local->hw.radiotap_mcs_details = IEEE80211_RADIOTAP_MCS_HAVE_MCS |
 677                                          IEEE80211_RADIOTAP_MCS_HAVE_GI |
 678                                          IEEE80211_RADIOTAP_MCS_HAVE_BW;
 679         local->hw.radiotap_vht_details = IEEE80211_RADIOTAP_VHT_KNOWN_GI |
 680                                          IEEE80211_RADIOTAP_VHT_KNOWN_BANDWIDTH;
 681         local->hw.uapsd_queues = IEEE80211_DEFAULT_UAPSD_QUEUES;
 682         local->hw.uapsd_max_sp_len = IEEE80211_DEFAULT_MAX_SP_LEN;
 683         local->hw.max_mtu = IEEE80211_MAX_DATA_LEN;
 684         local->user_power_level = IEEE80211_UNSET_POWER_LEVEL;
 685         wiphy->ht_capa_mod_mask = &mac80211_ht_capa_mod_mask;
 686         wiphy->vht_capa_mod_mask = &mac80211_vht_capa_mod_mask;
 687
 688         local->ext_capa[7] = WLAN_EXT_CAPA8_OPMODE_NOTIF;
 689
 690         wiphy->extended_capabilities = local->ext_capa;
 691         wiphy->extended_capabilities_mask = local->ext_capa;
 692         wiphy->extended_capabilities_len =
 693                 ARRAY_SIZE(local->ext_capa);
 694
 695         INIT_LIST_HEAD(&local->interfaces);
 696         INIT_LIST_HEAD(&local->mon_list);
 697
 698         __hw_addr_init(&local->mc_list);
 699
 700         mutex_init(&local->iflist_mtx);
 701         mutex_init(&local->mtx);
 702
 703         mutex_init(&local->key_mtx);
 704         spin_lock_init(&local->filter_lock);
 705         spin_lock_init(&local->rx_path_lock);
 706         spin_lock_init(&local->queue_stop_reason_lock);
 707
 708         for (i = 0; i < IEEE80211_NUM_ACS; i++) {
 709                 INIT_LIST_HEAD(&local->active_txqs[i]);
 710                 spin_lock_init(&local->active_txq_lock[i]);
 711                 local->aql_txq_limit_low[i] = IEEE80211_DEFAULT_AQL_TXQ_LIMIT_L;
 712                 local->aql_txq_limit_high[i] =
 713                         IEEE80211_DEFAULT_AQL_TXQ_LIMIT_H;
 714         }
 715
 716         local->airtime_flags = AIRTIME_USE_TX | AIRTIME_USE_RX;
 717         local->aql_threshold = IEEE80211_AQL_THRESHOLD;
 718         atomic_set(&local->aql_total_pending_airtime, 0);
 719
 720         INIT_LIST_HEAD(&local->chanctx_list);
 721         mutex_init(&local->chanctx_mtx);
 722
 723         INIT_DELAYED_WORK(&local->scan_work, ieee80211_scan_work);
 724
 725         INIT_WORK(&local->restart_work, ieee80211_restart_work);
 726
 727         INIT_WORK(&local->radar_detected_work,
 728                   ieee80211_dfs_radar_detected_work);
 729
 730         INIT_WORK(&local->reconfig_filter, ieee80211_reconfig_filter);
 731         local->smps_mode = IEEE80211_SMPS_OFF;
 732
 733         INIT_WORK(&local->dynamic_ps_enable_work,
 734                   ieee80211_dynamic_ps_enable_work);
 735         INIT_WORK(&local->dynamic_ps_disable_work,
 736                   ieee80211_dynamic_ps_disable_work);
 737         timer_setup(&local->dynamic_ps_timer, ieee80211_dynamic_ps_timer, 0);
 738
 739         INIT_WORK(&local->sched_scan_stopped_work,
 740                   ieee80211_sched_scan_stopped_work);
 741
 742         INIT_WORK(&local->tdls_chsw_work, ieee80211_tdls_chsw_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         skb_queue_head_init(&local->skb_queue_tdls_chsw);
 761
 762         ieee80211_alloc_led_names(local);
 763
 764         ieee80211_roc_setup(local);
 765
 766         local->hw.radiotap_timestamp.units_pos = -1;
 767         local->hw.radiotap_timestamp.accuracy = -1;
 768
 769         return &local->hw;
 770  err_free:
 771         wiphy_free(wiphy);
 772         return NULL;
 773 }
 774 EXPORT_SYMBOL(ieee80211_alloc_hw_nm);
 775
 776 static int ieee80211_init_cipher_suites(struct ieee80211_local *local)
 777 {
 778         bool have_wep = !fips_enabled; /* FIPS does not permit the use of RC4 */
 779         bool have_mfp = ieee80211_hw_check(&local->hw, MFP_CAPABLE);
 780         int n_suites = 0, r = 0, w = 0;
 781         u32 *suites;
 782         static const u32 cipher_suites[] = {
 783                 /* keep WEP first, it may be removed below */
 784                 WLAN_CIPHER_SUITE_WEP40,
 785                 WLAN_CIPHER_SUITE_WEP104,
 786                 WLAN_CIPHER_SUITE_TKIP,
 787                 WLAN_CIPHER_SUITE_CCMP,
 788                 WLAN_CIPHER_SUITE_CCMP_256,
 789                 WLAN_CIPHER_SUITE_GCMP,
 790                 WLAN_CIPHER_SUITE_GCMP_256,
 791
 792                 /* keep last -- depends on hw flags! */
 793                 WLAN_CIPHER_SUITE_AES_CMAC,
 794                 WLAN_CIPHER_SUITE_BIP_CMAC_256,
 795                 WLAN_CIPHER_SUITE_BIP_GMAC_128,
 796                 WLAN_CIPHER_SUITE_BIP_GMAC_256,
 797         };
 798
 799         if (ieee80211_hw_check(&local->hw, SW_CRYPTO_CONTROL) ||
 800             local->hw.wiphy->cipher_suites) {
 801                 /* If the driver advertises, or doesn't support SW crypto,
 802                  * we only need to remove WEP if necessary.
 803                  */
 804                 if (have_wep)
 805                         return 0;
 806
 807                 /* well if it has _no_ ciphers ... fine */
 808                 if (!local->hw.wiphy->n_cipher_suites)
 809                         return 0;
 810
 811                 /* Driver provides cipher suites, but we need to exclude WEP */
 812                 suites = kmemdup(local->hw.wiphy->cipher_suites,
 813                                  sizeof(u32) * local->hw.wiphy->n_cipher_suites,
 814                                  GFP_KERNEL);
 815                 if (!suites)
 816                         return -ENOMEM;
 817
 818                 for (r = 0; r < local->hw.wiphy->n_cipher_suites; r++) {
 819                         u32 suite = local->hw.wiphy->cipher_suites[r];
 820
 821                         if (suite == WLAN_CIPHER_SUITE_WEP40 ||
 822                             suite == WLAN_CIPHER_SUITE_WEP104)
 823                                 continue;
 824                         suites[w++] = suite;
 825                 }
 826         } else if (!local->hw.cipher_schemes) {
 827                 /* If the driver doesn't have cipher schemes, there's nothing
 828                  * else to do other than assign the (software supported and
 829                  * perhaps offloaded) cipher suites.
 830                  */
 831                 local->hw.wiphy->cipher_suites = cipher_suites;
 832                 local->hw.wiphy->n_cipher_suites = ARRAY_SIZE(cipher_suites);
 833
 834                 if (!have_mfp)
 835                         local->hw.wiphy->n_cipher_suites -= 4;
 836
 837                 if (!have_wep) {
 838                         local->hw.wiphy->cipher_suites += 2;
 839                         local->hw.wiphy->n_cipher_suites -= 2;
 840                 }
 841
 842                 /* not dynamically allocated, so just return */
 843                 return 0;
 844         } else {
 845                 const struct ieee80211_cipher_scheme *cs;
 846
 847                 cs = local->hw.cipher_schemes;
 848
 849                 /* Driver specifies cipher schemes only (but not cipher suites
 850                  * including the schemes)
 851                  *
 852                  * We start counting ciphers defined by schemes, TKIP, CCMP,
 853                  * CCMP-256, GCMP, and GCMP-256
 854                  */
 855                 n_suites = local->hw.n_cipher_schemes + 5;
 856
 857                 /* check if we have WEP40 and WEP104 */
 858                 if (have_wep)
 859                         n_suites += 2;
 860
 861                 /* check if we have AES_CMAC, BIP-CMAC-256, BIP-GMAC-128,
 862                  * BIP-GMAC-256
 863                  */
 864                 if (have_mfp)
 865                         n_suites += 4;
 866
 867                 suites = kmalloc_array(n_suites, sizeof(u32), GFP_KERNEL);
 868                 if (!suites)
 869                         return -ENOMEM;
 870
 871                 suites[w++] = WLAN_CIPHER_SUITE_CCMP;
 872                 suites[w++] = WLAN_CIPHER_SUITE_CCMP_256;
 873                 suites[w++] = WLAN_CIPHER_SUITE_TKIP;
 874                 suites[w++] = WLAN_CIPHER_SUITE_GCMP;
 875                 suites[w++] = WLAN_CIPHER_SUITE_GCMP_256;
 876
 877                 if (have_wep) {
 878                         suites[w++] = WLAN_CIPHER_SUITE_WEP40;
 879                         suites[w++] = WLAN_CIPHER_SUITE_WEP104;
 880                 }
 881
 882                 if (have_mfp) {
 883                         suites[w++] = WLAN_CIPHER_SUITE_AES_CMAC;
 884                         suites[w++] = WLAN_CIPHER_SUITE_BIP_CMAC_256;
 885                         suites[w++] = WLAN_CIPHER_SUITE_BIP_GMAC_128;
 886                         suites[w++] = WLAN_CIPHER_SUITE_BIP_GMAC_256;
 887                 }
 888
 889                 for (r = 0; r < local->hw.n_cipher_schemes; r++) {
 890                         suites[w++] = cs[r].cipher;
 891                         if (WARN_ON(cs[r].pn_len > IEEE80211_MAX_PN_LEN)) {
 892                                 kfree(suites);
 893                                 return -EINVAL;
 894                         }
 895                 }
 896         }
 897
 898         local->hw.wiphy->cipher_suites = suites;
 899         local->hw.wiphy->n_cipher_suites = w;
 900         local->wiphy_ciphers_allocated = true;
 901
 902         return 0;
 903 }
 904
 905 int ieee80211_register_hw(struct ieee80211_hw *hw)
 906 {
 907         struct ieee80211_local *local = hw_to_local(hw);
 908         int result, i;
 909         enum nl80211_band band;
 910         int channels, max_bitrates;
 911         bool supp_ht, supp_vht, supp_he;
 912         struct cfg80211_chan_def dflt_chandef = {};
 913
 914         if (ieee80211_hw_check(hw, QUEUE_CONTROL) &&
 915             (local->hw.offchannel_tx_hw_queue == IEEE80211_INVAL_HW_QUEUE ||
 916              local->hw.offchannel_tx_hw_queue >= local->hw.queues))
 917                 return -EINVAL;
 918
 919         if ((hw->wiphy->features & NL80211_FEATURE_TDLS_CHANNEL_SWITCH) &&
 920             (!local->ops->tdls_channel_switch ||
 921              !local->ops->tdls_cancel_channel_switch ||
 922              !local->ops->tdls_recv_channel_switch))
 923                 return -EOPNOTSUPP;
 924
 925         if (WARN_ON(ieee80211_hw_check(hw, SUPPORTS_TX_FRAG) &&
 926                     !local->ops->set_frag_threshold))
 927                 return -EINVAL;
 928
 929         if (WARN_ON(local->hw.wiphy->interface_modes &
 930                         BIT(NL80211_IFTYPE_NAN) &&
 931                     (!local->ops->start_nan || !local->ops->stop_nan)))
 932                 return -EINVAL;
 933
 934 #ifdef CONFIG_PM
 935         if (hw->wiphy->wowlan && (!local->ops->suspend || !local->ops->resume))
 936                 return -EINVAL;
 937 #endif
 938
 939         if (!local->use_chanctx) {
 940                 for (i = 0; i < local->hw.wiphy->n_iface_combinations; i++) {
 941                         const struct ieee80211_iface_combination *comb;
 942
 943                         comb = &local->hw.wiphy->iface_combinations[i];
 944
 945                         if (comb->num_different_channels > 1)
 946                                 return -EINVAL;
 947                 }
 948         } else {
 949                 /* DFS is not supported with multi-channel combinations yet */
 950                 for (i = 0; i < local->hw.wiphy->n_iface_combinations; i++) {
 951                         const struct ieee80211_iface_combination *comb;
 952
 953                         comb = &local->hw.wiphy->iface_combinations[i];
 954
 955                         if (comb->radar_detect_widths &&
 956                             comb->num_different_channels > 1)
 957                                 return -EINVAL;
 958                 }
 959         }
 960
 961         /* Only HW csum features are currently compatible with mac80211 */
 962         if (WARN_ON(hw->netdev_features & ~MAC80211_SUPPORTED_FEATURES))
 963                 return -EINVAL;
 964
 965         if (hw->max_report_rates == 0)
 966                 hw->max_report_rates = hw->max_rates;
 967
 968         local->rx_chains = 1;
 969
 970         /*
 971          * generic code guarantees at least one band,
 972          * set this very early because much code assumes
 973          * that hw.conf.channel is assigned
 974          */
 975         channels = 0;
 976         max_bitrates = 0;
 977         supp_ht = false;
 978         supp_vht = false;
 979         supp_he = false;
 980         for (band = 0; band < NUM_NL80211_BANDS; band++) {
 981                 struct ieee80211_supported_band *sband;
 982
 983                 sband = local->hw.wiphy->bands[band];
 984                 if (!sband)
 985                         continue;
 986
 987                 if (!dflt_chandef.chan) {
 988                         /*
 989                          * Assign the first enabled channel to dflt_chandef
 990                          * from the list of channels
 991                          */
 992                         for (i = 0; i < sband->n_channels; i++)
 993                                 if (!(sband->channels[i].flags &
 994                                                 IEEE80211_CHAN_DISABLED))
 995                                         break;
 996                         /* if none found then use the first anyway */
 997                         if (i == sband->n_channels)
 998                                 i = 0;
 999                         cfg80211_chandef_create(&dflt_chandef,
1000                                                 &sband->channels[i],
1001                                                 NL80211_CHAN_NO_HT);
1002                         /* init channel we're on */
1003                         if (!local->use_chanctx && !local->_oper_chandef.chan) {
1004                                 local->hw.conf.chandef = dflt_chandef;
1005                                 local->_oper_chandef = dflt_chandef;
1006                         }
1007                         local->monitor_chandef = dflt_chandef;
1008                 }
1009
1010                 channels += sband->n_channels;
1011
1012                 if (max_bitrates < sband->n_bitrates)
1013                         max_bitrates = sband->n_bitrates;
1014                 supp_ht = supp_ht || sband->ht_cap.ht_supported;
1015                 supp_vht = supp_vht || sband->vht_cap.vht_supported;
1016
1017                 if (!supp_he)
1018                         supp_he = !!ieee80211_get_he_sta_cap(sband);
1019
1020                 /* HT, VHT, HE require QoS, thus >= 4 queues */
1021                 if (WARN_ON(local->hw.queues < IEEE80211_NUM_ACS &&
1022                             (supp_ht || supp_vht || supp_he)))
1023                         return -EINVAL;
1024
1025                 if (!sband->ht_cap.ht_supported)
1026                         continue;
1027
1028                 /* TODO: consider VHT for RX chains, hopefully it's the same */
1029                 local->rx_chains =
1030                         max(ieee80211_mcs_to_chains(&sband->ht_cap.mcs),
1031                             local->rx_chains);
1032
1033                 /* no need to mask, SM_PS_DISABLED has all bits set */
1034                 sband->ht_cap.cap |= WLAN_HT_CAP_SM_PS_DISABLED <<
1035                                      IEEE80211_HT_CAP_SM_PS_SHIFT;
1036         }
1037
1038         /* if low-level driver supports AP, we also support VLAN.
1039          * drivers advertising SW_CRYPTO_CONTROL should enable AP_VLAN
1040          * based on their support to transmit SW encrypted packets.
1041          */
1042         if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_AP) &&
1043             !ieee80211_hw_check(&local->hw, SW_CRYPTO_CONTROL)) {
1044                 hw->wiphy->interface_modes |= BIT(NL80211_IFTYPE_AP_VLAN);
1045                 hw->wiphy->software_iftypes |= BIT(NL80211_IFTYPE_AP_VLAN);
1046         }
1047
1048         /* mac80211 always supports monitor */
1049         hw->wiphy->interface_modes |= BIT(NL80211_IFTYPE_MONITOR);
1050         hw->wiphy->software_iftypes |= BIT(NL80211_IFTYPE_MONITOR);
1051
1052         /* mac80211 doesn't support more than one IBSS interface right now */
1053         for (i = 0; i < hw->wiphy->n_iface_combinations; i++) {
1054                 const struct ieee80211_iface_combination *c;
1055                 int j;
1056
1057                 c = &hw->wiphy->iface_combinations[i];
1058
1059                 for (j = 0; j < c->n_limits; j++)
1060                         if ((c->limits[j].types & BIT(NL80211_IFTYPE_ADHOC)) &&
1061                             c->limits[j].max > 1)
1062                                 return -EINVAL;
1063         }
1064
1065         local->int_scan_req = kzalloc(sizeof(*local->int_scan_req) +
1066                                       sizeof(void *) * channels, GFP_KERNEL);
1067         if (!local->int_scan_req)
1068                 return -ENOMEM;
1069
1070         for (band = 0; band < NUM_NL80211_BANDS; band++) {
1071                 if (!local->hw.wiphy->bands[band])
1072                         continue;
1073                 local->int_scan_req->rates[band] = (u32) -1;
1074         }
1075
1076 #ifndef CONFIG_MAC80211_MESH
1077         /* mesh depends on Kconfig, but drivers should set it if they want */
1078         local->hw.wiphy->interface_modes &= ~BIT(NL80211_IFTYPE_MESH_POINT);
1079 #endif
1080
1081         /* if the underlying driver supports mesh, mac80211 will (at least)
1082          * provide routing of mesh authentication frames to userspace */
1083         if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_MESH_POINT))
1084                 local->hw.wiphy->flags |= WIPHY_FLAG_MESH_AUTH;
1085
1086         /* mac80211 supports control port protocol changing */
1087         local->hw.wiphy->flags |= WIPHY_FLAG_CONTROL_PORT_PROTOCOL;
1088
1089         if (ieee80211_hw_check(&local->hw, SIGNAL_DBM)) {
1090                 local->hw.wiphy->signal_type = CFG80211_SIGNAL_TYPE_MBM;
1091         } else if (ieee80211_hw_check(&local->hw, SIGNAL_UNSPEC)) {
1092                 local->hw.wiphy->signal_type = CFG80211_SIGNAL_TYPE_UNSPEC;
1093                 if (hw->max_signal <= 0) {
1094                         result = -EINVAL;
1095                         goto fail_workqueue;
1096                 }
1097         }
1098
1099         /* Mac80211 and therefore all drivers using SW crypto only
1100          * are able to handle PTK rekeys and Extended Key ID.
1101          */
1102         if (!local->ops->set_key) {
1103                 wiphy_ext_feature_set(local->hw.wiphy,
1104                                       NL80211_EXT_FEATURE_CAN_REPLACE_PTK0);
1105                 wiphy_ext_feature_set(local->hw.wiphy,
1106                                       NL80211_EXT_FEATURE_EXT_KEY_ID);
1107         }
1108
1109         if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_ADHOC))
1110                 wiphy_ext_feature_set(local->hw.wiphy,
1111                                       NL80211_EXT_FEATURE_DEL_IBSS_STA);
1112
1113         /*
1114          * Calculate scan IE length -- we need this to alloc
1115          * memory and to subtract from the driver limit. It
1116          * includes the DS Params, (extended) supported rates, and HT
1117          * information -- SSID is the driver's responsibility.
1118          */
1119         local->scan_ies_len = 4 + max_bitrates /* (ext) supp rates */ +
1120                 3 /* DS Params */;
1121         if (supp_ht)
1122                 local->scan_ies_len += 2 + sizeof(struct ieee80211_ht_cap);
1123
1124         if (supp_vht)
1125                 local->scan_ies_len +=
1126                         2 + sizeof(struct ieee80211_vht_cap);
1127
1128         /* HE cap element is variable in size - set len to allow max size */
1129         /*
1130          * TODO: 1 is added at the end of the calculation to accommodate for
1131          *      the temporary placing of the HE capabilities IE under EXT.
1132          *      Remove it once it is placed in the final place.
1133          */
1134         if (supp_he)
1135                 local->scan_ies_len +=
1136                         2 + sizeof(struct ieee80211_he_cap_elem) +
1137                         sizeof(struct ieee80211_he_mcs_nss_supp) +
1138                         IEEE80211_HE_PPE_THRES_MAX_LEN + 1;
1139
1140         if (!local->ops->hw_scan) {
1141                 /* For hw_scan, driver needs to set these up. */
1142                 local->hw.wiphy->max_scan_ssids = 4;
1143                 local->hw.wiphy->max_scan_ie_len = IEEE80211_MAX_DATA_LEN;
1144         }
1145
1146         /*
1147          * If the driver supports any scan IEs, then assume the
1148          * limit includes the IEs mac80211 will add, otherwise
1149          * leave it at zero and let the driver sort it out; we
1150          * still pass our IEs to the driver but userspace will
1151          * not be allowed to in that case.
1152          */
1153         if (local->hw.wiphy->max_scan_ie_len)
1154                 local->hw.wiphy->max_scan_ie_len -= local->scan_ies_len;
1155
1156         if (WARN_ON(!ieee80211_cs_list_valid(local->hw.cipher_schemes,
1157                                              local->hw.n_cipher_schemes))) {
1158                 result = -EINVAL;
1159                 goto fail_workqueue;
1160         }
1161
1162         result = ieee80211_init_cipher_suites(local);
1163         if (result < 0)
1164                 goto fail_workqueue;
1165
1166         if (!local->ops->remain_on_channel)
1167                 local->hw.wiphy->max_remain_on_channel_duration = 5000;
1168
1169         /* mac80211 based drivers don't support internal TDLS setup */
1170         if (local->hw.wiphy->flags & WIPHY_FLAG_SUPPORTS_TDLS)
1171                 local->hw.wiphy->flags |= WIPHY_FLAG_TDLS_EXTERNAL_SETUP;
1172
1173         /* mac80211 supports eCSA, if the driver supports STA CSA at all */
1174         if (ieee80211_hw_check(&local->hw, CHANCTX_STA_CSA))
1175                 local->ext_capa[0] |= WLAN_EXT_CAPA1_EXT_CHANNEL_SWITCHING;
1176
1177         /* mac80211 supports multi BSSID, if the driver supports it */
1178         if (ieee80211_hw_check(&local->hw, SUPPORTS_MULTI_BSSID)) {
1179                 local->hw.wiphy->support_mbssid = true;
1180                 if (ieee80211_hw_check(&local->hw,
1181                                        SUPPORTS_ONLY_HE_MULTI_BSSID))
1182                         local->hw.wiphy->support_only_he_mbssid = true;
1183                 else
1184                         local->ext_capa[2] |=
1185                                 WLAN_EXT_CAPA3_MULTI_BSSID_SUPPORT;
1186         }
1187
1188         local->hw.wiphy->max_num_csa_counters = IEEE80211_MAX_CNTDWN_COUNTERS_NUM;
1189
1190         /*
1191          * We use the number of queues for feature tests (QoS, HT) internally
1192          * so restrict them appropriately.
1193          */
1194         if (hw->queues > IEEE80211_MAX_QUEUES)
1195                 hw->queues = IEEE80211_MAX_QUEUES;
1196
1197         local->workqueue =
1198                 alloc_ordered_workqueue("%s", 0, wiphy_name(local->hw.wiphy));
1199         if (!local->workqueue) {
1200                 result = -ENOMEM;
1201                 goto fail_workqueue;
1202         }
1203
1204         /*
1205          * The hardware needs headroom for sending the frame,
1206          * and we need some headroom for passing the frame to monitor
1207          * interfaces, but never both at the same time.
1208          */
1209         local->tx_headroom = max_t(unsigned int , local->hw.extra_tx_headroom,
1210                                    IEEE80211_TX_STATUS_HEADROOM);
1211
1212         /*
1213          * if the driver doesn't specify a max listen interval we
1214          * use 5 which should be a safe default
1215          */
1216         if (local->hw.max_listen_interval == 0)
1217                 local->hw.max_listen_interval = 5;
1218
1219         local->hw.conf.listen_interval = local->hw.max_listen_interval;
1220
1221         local->dynamic_ps_forced_timeout = -1;
1222
1223         if (!local->hw.max_nan_de_entries)
1224                 local->hw.max_nan_de_entries = IEEE80211_MAX_NAN_INSTANCE_ID;
1225
1226         if (!local->hw.weight_multiplier)
1227                 local->hw.weight_multiplier = 1;
1228
1229         ieee80211_wep_init(local);
1230
1231         local->hw.conf.flags = IEEE80211_CONF_IDLE;
1232
1233         ieee80211_led_init(local);
1234
1235         result = ieee80211_txq_setup_flows(local);
1236         if (result)
1237                 goto fail_flows;
1238
1239         rtnl_lock();
1240         result = ieee80211_init_rate_ctrl_alg(local,
1241                                               hw->rate_control_algorithm);
1242         rtnl_unlock();
1243         if (result < 0) {
1244                 wiphy_debug(local->hw.wiphy,
1245                             "Failed to initialize rate control algorithm\n");
1246                 goto fail_rate;
1247         }
1248
1249         if (local->rate_ctrl) {
1250                 clear_bit(IEEE80211_HW_SUPPORTS_VHT_EXT_NSS_BW, hw->flags);
1251                 if (local->rate_ctrl->ops->capa & RATE_CTRL_CAPA_VHT_EXT_NSS_BW)
1252                         ieee80211_hw_set(hw, SUPPORTS_VHT_EXT_NSS_BW);
1253         }
1254
1255         /*
1256          * If the VHT capabilities don't have IEEE80211_VHT_EXT_NSS_BW_CAPABLE,
1257          * or have it when we don't, copy the sband structure and set/clear it.
1258          * This is necessary because rate scaling algorithms could be switched
1259          * and have different support values.
1260          * Print a message so that in the common case the reallocation can be
1261          * avoided.
1262          */
1263         BUILD_BUG_ON(NUM_NL80211_BANDS > 8 * sizeof(local->sband_allocated));
1264         for (band = 0; band < NUM_NL80211_BANDS; band++) {
1265                 struct ieee80211_supported_band *sband;
1266                 bool local_cap, ie_cap;
1267
1268                 local_cap = ieee80211_hw_check(hw, SUPPORTS_VHT_EXT_NSS_BW);
1269
1270                 sband = local->hw.wiphy->bands[band];
1271                 if (!sband || !sband->vht_cap.vht_supported)
1272                         continue;
1273
1274                 ie_cap = !!(sband->vht_cap.vht_mcs.tx_highest &
1275                             cpu_to_le16(IEEE80211_VHT_EXT_NSS_BW_CAPABLE));
1276
1277                 if (local_cap == ie_cap)
1278                         continue;
1279
1280                 sband = kmemdup(sband, sizeof(*sband), GFP_KERNEL);
1281                 if (!sband) {
1282                         result = -ENOMEM;
1283                         goto fail_rate;
1284                 }
1285
1286                 wiphy_dbg(hw->wiphy, "copying sband (band %d) due to VHT EXT NSS BW flag\n",
1287                           band);
1288
1289                 sband->vht_cap.vht_mcs.tx_highest ^=
1290                         cpu_to_le16(IEEE80211_VHT_EXT_NSS_BW_CAPABLE);
1291
1292                 local->hw.wiphy->bands[band] = sband;
1293                 local->sband_allocated |= BIT(band);
1294         }
1295
1296         result = wiphy_register(local->hw.wiphy);
1297         if (result < 0)
1298                 goto fail_wiphy_register;
1299
1300         debugfs_hw_add(local);
1301         rate_control_add_debugfs(local);
1302
1303         rtnl_lock();
1304         wiphy_lock(hw->wiphy);
1305
1306         /* add one default STA interface if supported */
1307         if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_STATION) &&
1308             !ieee80211_hw_check(hw, NO_AUTO_VIF)) {
1309                 struct vif_params params = {0};
1310
1311                 result = ieee80211_if_add(local, "wlan%d", NET_NAME_ENUM, NULL,
1312                                           NL80211_IFTYPE_STATION, &params);
1313                 if (result)
1314                         wiphy_warn(local->hw.wiphy,
1315                                    "Failed to add default virtual iface\n");
1316         }
1317
1318         wiphy_unlock(hw->wiphy);
1319         rtnl_unlock();
1320
1321 #ifdef CONFIG_INET
1322         local->ifa_notifier.notifier_call = ieee80211_ifa_changed;
1323         result = register_inetaddr_notifier(&local->ifa_notifier);
1324         if (result)
1325                 goto fail_ifa;
1326 #endif
1327
1328 #if IS_ENABLED(CONFIG_IPV6)
1329         local->ifa6_notifier.notifier_call = ieee80211_ifa6_changed;
1330         result = register_inet6addr_notifier(&local->ifa6_notifier);
1331         if (result)
1332                 goto fail_ifa6;
1333 #endif
1334
1335         return 0;
1336
1337 #if IS_ENABLED(CONFIG_IPV6)
1338  fail_ifa6:
1339 #ifdef CONFIG_INET
1340         unregister_inetaddr_notifier(&local->ifa_notifier);
1341 #endif
1342 #endif
1343 #if defined(CONFIG_INET) || defined(CONFIG_IPV6)
1344  fail_ifa:
1345 #endif
1346         wiphy_unregister(local->hw.wiphy);
1347  fail_wiphy_register:
1348         rtnl_lock();
1349         rate_control_deinitialize(local);
1350         ieee80211_remove_interfaces(local);
1351         rtnl_unlock();
1352  fail_rate:
1353  fail_flows:
1354         ieee80211_led_exit(local);
1355         destroy_workqueue(local->workqueue);
1356  fail_workqueue:
1357         if (local->wiphy_ciphers_allocated)
1358                 kfree(local->hw.wiphy->cipher_suites);
1359         kfree(local->int_scan_req);
1360         return result;
1361 }
1362 EXPORT_SYMBOL(ieee80211_register_hw);
1363
1364 void ieee80211_unregister_hw(struct ieee80211_hw *hw)
1365 {
1366         struct ieee80211_local *local = hw_to_local(hw);
1367
1368         tasklet_kill(&local->tx_pending_tasklet);
1369         tasklet_kill(&local->tasklet);
1370
1371 #ifdef CONFIG_INET
1372         unregister_inetaddr_notifier(&local->ifa_notifier);
1373 #endif
1374 #if IS_ENABLED(CONFIG_IPV6)
1375         unregister_inet6addr_notifier(&local->ifa6_notifier);
1376 #endif
1377
1378         rtnl_lock();
1379
1380         /*
1381          * At this point, interface list manipulations are fine
1382          * because the driver cannot be handing us frames any
1383          * more and the tasklet is killed.
1384          */
1385         ieee80211_remove_interfaces(local);
1386
1387         rtnl_unlock();
1388
1389         cancel_delayed_work_sync(&local->roc_work);
1390         cancel_work_sync(&local->restart_work);
1391         cancel_work_sync(&local->reconfig_filter);
1392         cancel_work_sync(&local->tdls_chsw_work);
1393         flush_work(&local->sched_scan_stopped_work);
1394         flush_work(&local->radar_detected_work);
1395
1396         ieee80211_clear_tx_pending(local);
1397         rate_control_deinitialize(local);
1398
1399         if (skb_queue_len(&local->skb_queue) ||
1400             skb_queue_len(&local->skb_queue_unreliable))
1401                 wiphy_warn(local->hw.wiphy, "skb_queue not empty\n");
1402         skb_queue_purge(&local->skb_queue);
1403         skb_queue_purge(&local->skb_queue_unreliable);
1404         skb_queue_purge(&local->skb_queue_tdls_chsw);
1405
1406         wiphy_unregister(local->hw.wiphy);
1407         destroy_workqueue(local->workqueue);
1408         ieee80211_led_exit(local);
1409         kfree(local->int_scan_req);
1410 }
1411 EXPORT_SYMBOL(ieee80211_unregister_hw);
1412
1413 static int ieee80211_free_ack_frame(int id, void *p, void *data)
1414 {
1415         WARN_ONCE(1, "Have pending ack frames!\n");
1416         kfree_skb(p);
1417         return 0;
1418 }
1419
1420 void ieee80211_free_hw(struct ieee80211_hw *hw)
1421 {
1422         struct ieee80211_local *local = hw_to_local(hw);
1423         enum nl80211_band band;
1424
1425         mutex_destroy(&local->iflist_mtx);
1426         mutex_destroy(&local->mtx);
1427
1428         if (local->wiphy_ciphers_allocated)
1429                 kfree(local->hw.wiphy->cipher_suites);
1430
1431         idr_for_each(&local->ack_status_frames,
1432                      ieee80211_free_ack_frame, NULL);
1433         idr_destroy(&local->ack_status_frames);
1434
1435         sta_info_stop(local);
1436
1437         ieee80211_free_led_names(local);
1438
1439         for (band = 0; band < NUM_NL80211_BANDS; band++) {
1440                 if (!(local->sband_allocated & BIT(band)))
1441                         continue;
1442                 kfree(local->hw.wiphy->bands[band]);
1443         }
1444
1445         wiphy_free(local->hw.wiphy);
1446 }
1447 EXPORT_SYMBOL(ieee80211_free_hw);
1448
1449 static int __init ieee80211_init(void)
1450 {
1451         struct sk_buff *skb;
1452         int ret;
1453
1454         BUILD_BUG_ON(sizeof(struct ieee80211_tx_info) > sizeof(skb->cb));
1455         BUILD_BUG_ON(offsetof(struct ieee80211_tx_info, driver_data) +
1456                      IEEE80211_TX_INFO_DRIVER_DATA_SIZE > sizeof(skb->cb));
1457
1458         ret = rc80211_minstrel_init();
1459         if (ret)
1460                 return ret;
1461
1462         ret = ieee80211_iface_init();
1463         if (ret)
1464                 goto err_netdev;
1465
1466         return 0;
1467  err_netdev:
1468         rc80211_minstrel_exit();
1469
1470         return ret;
1471 }
1472
1473 static void __exit ieee80211_exit(void)
1474 {
1475         rc80211_minstrel_exit();
1476
1477         ieee80211s_stop();
1478
1479         ieee80211_iface_exit();
1480
1481         rcu_barrier();
1482 }
1483
1484
1485 subsys_initcall(ieee80211_init);
1486 module_exit(ieee80211_exit);
1487
1488 MODULE_DESCRIPTION("IEEE 802.11 subsystem");
1489 MODULE_LICENSE("GPL");