net/mac80211/main.c

   1 /*
   2  * Copyright 2002-2005, Instant802 Networks, Inc.
   3  * Copyright 2005-2006, Devicescape Software, Inc.
   4  * Copyright 2006-2007  Jiri Benc <jbenc@suse.cz>
   5  * Copyright 2013-2014  Intel Mobile Communications GmbH
   6  *
   7  * This program is free software; you can redistribute it and/or modify
   8  * it under the terms of the GNU General Public License version 2 as
   9  * published by the Free Software Foundation.
  10  */
  11
  12 #include <net/mac80211.h>
  13 #include <linux/module.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         spin_lock_bh(&local->filter_lock);
  68         changed_flags = local->filter_flags ^ new_flags;
  69
  70         mc = drv_prepare_multicast(local, &local->mc_list);
  71         spin_unlock_bh(&local->filter_lock);
  72
  73         /* be a bit nasty */
  74         new_flags |= (1<<31);
  75
  76         drv_configure_filter(local, changed_flags, &new_flags, mc);
  77
  78         WARN_ON(new_flags & (1<<31));
  79
  80         local->filter_flags = new_flags & ~(1<<31);
  81 }
  82
  83 static void ieee80211_reconfig_filter(struct work_struct *work)
  84 {
  85         struct ieee80211_local *local =
  86                 container_of(work, struct ieee80211_local, reconfig_filter);
  87
  88         ieee80211_configure_filter(local);
  89 }
  90
  91 static u32 ieee80211_hw_conf_chan(struct ieee80211_local *local)
  92 {
  93         struct ieee80211_sub_if_data *sdata;
  94         struct cfg80211_chan_def chandef = {};
  95         u32 changed = 0;
  96         int power;
  97         u32 offchannel_flag;
  98
  99         offchannel_flag = local->hw.conf.flags & IEEE80211_CONF_OFFCHANNEL;
 100
 101         if (local->scan_chandef.chan) {
 102                 chandef = local->scan_chandef;
 103         } else if (local->tmp_channel) {
 104                 chandef.chan = local->tmp_channel;
 105                 chandef.width = NL80211_CHAN_WIDTH_20_NOHT;
 106                 chandef.center_freq1 = chandef.chan->center_freq;
 107         } else
 108                 chandef = local->_oper_chandef;
 109
 110         WARN(!cfg80211_chandef_valid(&chandef),
 111              "control:%d MHz width:%d center: %d/%d MHz",
 112              chandef.chan->center_freq, chandef.width,
 113              chandef.center_freq1, chandef.center_freq2);
 114
 115         if (!cfg80211_chandef_identical(&chandef, &local->_oper_chandef))
 116                 local->hw.conf.flags |= IEEE80211_CONF_OFFCHANNEL;
 117         else
 118                 local->hw.conf.flags &= ~IEEE80211_CONF_OFFCHANNEL;
 119
 120         offchannel_flag ^= local->hw.conf.flags & IEEE80211_CONF_OFFCHANNEL;
 121
 122         if (offchannel_flag ||
 123             !cfg80211_chandef_identical(&local->hw.conf.chandef,
 124                                         &local->_oper_chandef)) {
 125                 local->hw.conf.chandef = chandef;
 126                 changed |= IEEE80211_CONF_CHANGE_CHANNEL;
 127         }
 128
 129         if (!conf_is_ht(&local->hw.conf)) {
 130                 /*
 131                  * mac80211.h documents that this is only valid
 132                  * when the channel is set to an HT type, and
 133                  * that otherwise STATIC is used.
 134                  */
 135                 local->hw.conf.smps_mode = IEEE80211_SMPS_STATIC;
 136         } else if (local->hw.conf.smps_mode != local->smps_mode) {
 137                 local->hw.conf.smps_mode = local->smps_mode;
 138                 changed |= IEEE80211_CONF_CHANGE_SMPS;
 139         }
 140
 141         power = ieee80211_chandef_max_power(&chandef);
 142
 143         rcu_read_lock();
 144         list_for_each_entry_rcu(sdata, &local->interfaces, list) {
 145                 if (!rcu_access_pointer(sdata->vif.chanctx_conf))
 146                         continue;
 147                 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
 148                         continue;
 149                 power = min(power, sdata->vif.bss_conf.txpower);
 150         }
 151         rcu_read_unlock();
 152
 153         if (local->hw.conf.power_level != power) {
 154                 changed |= IEEE80211_CONF_CHANGE_POWER;
 155                 local->hw.conf.power_level = power;
 156         }
 157
 158         return changed;
 159 }
 160
 161 int ieee80211_hw_config(struct ieee80211_local *local, u32 changed)
 162 {
 163         int ret = 0;
 164
 165         might_sleep();
 166
 167         if (!local->use_chanctx)
 168                 changed |= ieee80211_hw_conf_chan(local);
 169         else
 170                 changed &= ~(IEEE80211_CONF_CHANGE_CHANNEL |
 171                              IEEE80211_CONF_CHANGE_POWER);
 172
 173         if (changed && local->open_count) {
 174                 ret = drv_config(local, changed);
 175                 /*
 176                  * Goal:
 177                  * HW reconfiguration should never fail, the driver has told
 178                  * us what it can support so it should live up to that promise.
 179                  *
 180                  * Current status:
 181                  * rfkill is not integrated with mac80211 and a
 182                  * configuration command can thus fail if hardware rfkill
 183                  * is enabled
 184                  *
 185                  * FIXME: integrate rfkill with mac80211 and then add this
 186                  * WARN_ON() back
 187                  *
 188                  */
 189                 /* WARN_ON(ret); */
 190         }
 191
 192         return ret;
 193 }
 194
 195 void ieee80211_bss_info_change_notify(struct ieee80211_sub_if_data *sdata,
 196                                       u32 changed)
 197 {
 198         struct ieee80211_local *local = sdata->local;
 199
 200         if (!changed || sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
 201                 return;
 202
 203         drv_bss_info_changed(local, sdata, &sdata->vif.bss_conf, changed);
 204 }
 205
 206 u32 ieee80211_reset_erp_info(struct ieee80211_sub_if_data *sdata)
 207 {
 208         sdata->vif.bss_conf.use_cts_prot = false;
 209         sdata->vif.bss_conf.use_short_preamble = false;
 210         sdata->vif.bss_conf.use_short_slot = false;
 211         return BSS_CHANGED_ERP_CTS_PROT |
 212                BSS_CHANGED_ERP_PREAMBLE |
 213                BSS_CHANGED_ERP_SLOT;
 214 }
 215
 216 static void ieee80211_tasklet_handler(unsigned long data)
 217 {
 218         struct ieee80211_local *local = (struct ieee80211_local *) data;
 219         struct sk_buff *skb;
 220
 221         while ((skb = skb_dequeue(&local->skb_queue)) ||
 222                (skb = skb_dequeue(&local->skb_queue_unreliable))) {
 223                 switch (skb->pkt_type) {
 224                 case IEEE80211_RX_MSG:
 225                         /* Clear skb->pkt_type in order to not confuse kernel
 226                          * netstack. */
 227                         skb->pkt_type = 0;
 228                         ieee80211_rx(&local->hw, skb);
 229                         break;
 230                 case IEEE80211_TX_STATUS_MSG:
 231                         skb->pkt_type = 0;
 232                         ieee80211_tx_status(&local->hw, skb);
 233                         break;
 234                 default:
 235                         WARN(1, "mac80211: Packet is of unknown type %d\n",
 236                              skb->pkt_type);
 237                         dev_kfree_skb(skb);
 238                         break;
 239                 }
 240         }
 241 }
 242
 243 static void ieee80211_restart_work(struct work_struct *work)
 244 {
 245         struct ieee80211_local *local =
 246                 container_of(work, struct ieee80211_local, restart_work);
 247         struct ieee80211_sub_if_data *sdata;
 248
 249         /* wait for scan work complete */
 250         flush_workqueue(local->workqueue);
 251         flush_work(&local->sched_scan_stopped_work);
 252
 253         WARN(test_bit(SCAN_HW_SCANNING, &local->scanning),
 254              "%s called with hardware scan in progress\n", __func__);
 255
 256         flush_work(&local->radar_detected_work);
 257         rtnl_lock();
 258         list_for_each_entry(sdata, &local->interfaces, list) {
 259                 /*
 260                  * XXX: there may be more work for other vif types and even
 261                  * for station mode: a good thing would be to run most of
 262                  * the iface type's dependent _stop (ieee80211_mg_stop,
 263                  * ieee80211_ibss_stop) etc...
 264                  * For now, fix only the specific bug that was seen: race
 265                  * between csa_connection_drop_work and us.
 266                  */
 267                 if (sdata->vif.type == NL80211_IFTYPE_STATION) {
 268                         /*
 269                          * This worker is scheduled from the iface worker that
 270                          * runs on mac80211's workqueue, so we can't be
 271                          * scheduling this worker after the cancel right here.
 272                          * The exception is ieee80211_chswitch_done.
 273                          * Then we can have a race...
 274                          */
 275                         cancel_work_sync(&sdata->u.mgd.csa_connection_drop_work);
 276                 }
 277                 flush_delayed_work(&sdata->dec_tailroom_needed_wk);
 278         }
 279         ieee80211_scan_cancel(local);
 280
 281         /* make sure any new ROC will consider local->in_reconfig */
 282         flush_delayed_work(&local->roc_work);
 283         flush_work(&local->hw_roc_done);
 284
 285         ieee80211_reconfig(local);
 286         rtnl_unlock();
 287 }
 288
 289 void ieee80211_restart_hw(struct ieee80211_hw *hw)
 290 {
 291         struct ieee80211_local *local = hw_to_local(hw);
 292
 293         trace_api_restart_hw(local);
 294
 295         wiphy_info(hw->wiphy,
 296                    "Hardware restart was requested\n");
 297
 298         /* use this reason, ieee80211_reconfig will unblock it */
 299         ieee80211_stop_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP,
 300                                         IEEE80211_QUEUE_STOP_REASON_SUSPEND,
 301                                         false);
 302
 303         /*
 304          * Stop all Rx during the reconfig. We don't want state changes
 305          * or driver callbacks while this is in progress.
 306          */
 307         local->in_reconfig = true;
 308         barrier();
 309
 310         queue_work(system_freezable_wq, &local->restart_work);
 311 }
 312 EXPORT_SYMBOL(ieee80211_restart_hw);
 313
 314 #ifdef CONFIG_INET
 315 static int ieee80211_ifa_changed(struct notifier_block *nb,
 316                                  unsigned long data, void *arg)
 317 {
 318         struct in_ifaddr *ifa = arg;
 319         struct ieee80211_local *local =
 320                 container_of(nb, struct ieee80211_local,
 321                              ifa_notifier);
 322         struct net_device *ndev = ifa->ifa_dev->dev;
 323         struct wireless_dev *wdev = ndev->ieee80211_ptr;
 324         struct in_device *idev;
 325         struct ieee80211_sub_if_data *sdata;
 326         struct ieee80211_bss_conf *bss_conf;
 327         struct ieee80211_if_managed *ifmgd;
 328         int c = 0;
 329
 330         /* Make sure it's our interface that got changed */
 331         if (!wdev)
 332                 return NOTIFY_DONE;
 333
 334         if (wdev->wiphy != local->hw.wiphy)
 335                 return NOTIFY_DONE;
 336
 337         sdata = IEEE80211_DEV_TO_SUB_IF(ndev);
 338         bss_conf = &sdata->vif.bss_conf;
 339
 340         /* ARP filtering is only supported in managed mode */
 341         if (sdata->vif.type != NL80211_IFTYPE_STATION)
 342                 return NOTIFY_DONE;
 343
 344         idev = __in_dev_get_rtnl(sdata->dev);
 345         if (!idev)
 346                 return NOTIFY_DONE;
 347
 348         ifmgd = &sdata->u.mgd;
 349         sdata_lock(sdata);
 350
 351         /* Copy the addresses to the bss_conf list */
 352         ifa = idev->ifa_list;
 353         while (ifa) {
 354                 if (c < IEEE80211_BSS_ARP_ADDR_LIST_LEN)
 355                         bss_conf->arp_addr_list[c] = ifa->ifa_address;
 356                 ifa = ifa->ifa_next;
 357                 c++;
 358         }
 359
 360         bss_conf->arp_addr_cnt = c;
 361
 362         /* Configure driver only if associated (which also implies it is up) */
 363         if (ifmgd->associated)
 364                 ieee80211_bss_info_change_notify(sdata,
 365                                                  BSS_CHANGED_ARP_FILTER);
 366
 367         sdata_unlock(sdata);
 368
 369         return NOTIFY_OK;
 370 }
 371 #endif
 372
 373 #if IS_ENABLED(CONFIG_IPV6)
 374 static int ieee80211_ifa6_changed(struct notifier_block *nb,
 375                                   unsigned long data, void *arg)
 376 {
 377         struct inet6_ifaddr *ifa = (struct inet6_ifaddr *)arg;
 378         struct inet6_dev *idev = ifa->idev;
 379         struct net_device *ndev = ifa->idev->dev;
 380         struct ieee80211_local *local =
 381                 container_of(nb, struct ieee80211_local, ifa6_notifier);
 382         struct wireless_dev *wdev = ndev->ieee80211_ptr;
 383         struct ieee80211_sub_if_data *sdata;
 384
 385         /* Make sure it's our interface that got changed */
 386         if (!wdev || wdev->wiphy != local->hw.wiphy)
 387                 return NOTIFY_DONE;
 388
 389         sdata = IEEE80211_DEV_TO_SUB_IF(ndev);
 390
 391         /*
 392          * For now only support station mode. This is mostly because
 393          * doing AP would have to handle AP_VLAN in some way ...
 394          */
 395         if (sdata->vif.type != NL80211_IFTYPE_STATION)
 396                 return NOTIFY_DONE;
 397
 398         drv_ipv6_addr_change(local, sdata, idev);
 399
 400         return NOTIFY_OK;
 401 }
 402 #endif
 403
 404 /* There isn't a lot of sense in it, but you can transmit anything you like */
 405 static const struct ieee80211_txrx_stypes
 406 ieee80211_default_mgmt_stypes[NUM_NL80211_IFTYPES] = {
 407         [NL80211_IFTYPE_ADHOC] = {
 408                 .tx = 0xffff,
 409                 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
 410                         BIT(IEEE80211_STYPE_AUTH >> 4) |
 411                         BIT(IEEE80211_STYPE_DEAUTH >> 4) |
 412                         BIT(IEEE80211_STYPE_PROBE_REQ >> 4),
 413         },
 414         [NL80211_IFTYPE_STATION] = {
 415                 .tx = 0xffff,
 416                 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
 417                         BIT(IEEE80211_STYPE_PROBE_REQ >> 4),
 418         },
 419         [NL80211_IFTYPE_AP] = {
 420                 .tx = 0xffff,
 421                 .rx = BIT(IEEE80211_STYPE_ASSOC_REQ >> 4) |
 422                         BIT(IEEE80211_STYPE_REASSOC_REQ >> 4) |
 423                         BIT(IEEE80211_STYPE_PROBE_REQ >> 4) |
 424                         BIT(IEEE80211_STYPE_DISASSOC >> 4) |
 425                         BIT(IEEE80211_STYPE_AUTH >> 4) |
 426                         BIT(IEEE80211_STYPE_DEAUTH >> 4) |
 427                         BIT(IEEE80211_STYPE_ACTION >> 4),
 428         },
 429         [NL80211_IFTYPE_AP_VLAN] = {
 430                 /* copy AP */
 431                 .tx = 0xffff,
 432                 .rx = BIT(IEEE80211_STYPE_ASSOC_REQ >> 4) |
 433                         BIT(IEEE80211_STYPE_REASSOC_REQ >> 4) |
 434                         BIT(IEEE80211_STYPE_PROBE_REQ >> 4) |
 435                         BIT(IEEE80211_STYPE_DISASSOC >> 4) |
 436                         BIT(IEEE80211_STYPE_AUTH >> 4) |
 437                         BIT(IEEE80211_STYPE_DEAUTH >> 4) |
 438                         BIT(IEEE80211_STYPE_ACTION >> 4),
 439         },
 440         [NL80211_IFTYPE_P2P_CLIENT] = {
 441                 .tx = 0xffff,
 442                 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
 443                         BIT(IEEE80211_STYPE_PROBE_REQ >> 4),
 444         },
 445         [NL80211_IFTYPE_P2P_GO] = {
 446                 .tx = 0xffff,
 447                 .rx = BIT(IEEE80211_STYPE_ASSOC_REQ >> 4) |
 448                         BIT(IEEE80211_STYPE_REASSOC_REQ >> 4) |
 449                         BIT(IEEE80211_STYPE_PROBE_REQ >> 4) |
 450                         BIT(IEEE80211_STYPE_DISASSOC >> 4) |
 451                         BIT(IEEE80211_STYPE_AUTH >> 4) |
 452                         BIT(IEEE80211_STYPE_DEAUTH >> 4) |
 453                         BIT(IEEE80211_STYPE_ACTION >> 4),
 454         },
 455         [NL80211_IFTYPE_MESH_POINT] = {
 456                 .tx = 0xffff,
 457                 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
 458                         BIT(IEEE80211_STYPE_AUTH >> 4) |
 459                         BIT(IEEE80211_STYPE_DEAUTH >> 4),
 460         },
 461         [NL80211_IFTYPE_P2P_DEVICE] = {
 462                 .tx = 0xffff,
 463                 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
 464                         BIT(IEEE80211_STYPE_PROBE_REQ >> 4),
 465         },
 466 };
 467
 468 static const struct ieee80211_ht_cap mac80211_ht_capa_mod_mask = {
 469         .ampdu_params_info = IEEE80211_HT_AMPDU_PARM_FACTOR |
 470                              IEEE80211_HT_AMPDU_PARM_DENSITY,
 471
 472         .cap_info = cpu_to_le16(IEEE80211_HT_CAP_SUP_WIDTH_20_40 |
 473                                 IEEE80211_HT_CAP_MAX_AMSDU |
 474                                 IEEE80211_HT_CAP_SGI_20 |
 475                                 IEEE80211_HT_CAP_SGI_40 |
 476                                 IEEE80211_HT_CAP_LDPC_CODING |
 477                                 IEEE80211_HT_CAP_40MHZ_INTOLERANT),
 478         .mcs = {
 479                 .rx_mask = { 0xff, 0xff, 0xff, 0xff, 0xff,
 480                              0xff, 0xff, 0xff, 0xff, 0xff, },
 481         },
 482 };
 483
 484 static const struct ieee80211_vht_cap mac80211_vht_capa_mod_mask = {
 485         .vht_cap_info =
 486                 cpu_to_le32(IEEE80211_VHT_CAP_RXLDPC |
 487                             IEEE80211_VHT_CAP_SHORT_GI_80 |
 488                             IEEE80211_VHT_CAP_SHORT_GI_160 |
 489                             IEEE80211_VHT_CAP_RXSTBC_MASK |
 490                             IEEE80211_VHT_CAP_TXSTBC |
 491                             IEEE80211_VHT_CAP_SU_BEAMFORMER_CAPABLE |
 492                             IEEE80211_VHT_CAP_SU_BEAMFORMEE_CAPABLE |
 493                             IEEE80211_VHT_CAP_TX_ANTENNA_PATTERN |
 494                             IEEE80211_VHT_CAP_RX_ANTENNA_PATTERN |
 495                             IEEE80211_VHT_CAP_MAX_A_MPDU_LENGTH_EXPONENT_MASK),
 496         .supp_mcs = {
 497                 .rx_mcs_map = cpu_to_le16(~0),
 498                 .tx_mcs_map = cpu_to_le16(~0),
 499         },
 500 };
 501
 502 struct ieee80211_hw *ieee80211_alloc_hw_nm(size_t priv_data_len,
 503                                            const struct ieee80211_ops *ops,
 504                                            const char *requested_name)
 505 {
 506         struct ieee80211_local *local;
 507         int priv_size, i;
 508         struct wiphy *wiphy;
 509         bool use_chanctx;
 510
 511         if (WARN_ON(!ops->tx || !ops->start || !ops->stop || !ops->config ||
 512                     !ops->add_interface || !ops->remove_interface ||
 513                     !ops->configure_filter))
 514                 return NULL;
 515
 516         if (WARN_ON(ops->sta_state && (ops->sta_add || ops->sta_remove)))
 517                 return NULL;
 518
 519         /* check all or no channel context operations exist */
 520         i = !!ops->add_chanctx + !!ops->remove_chanctx +
 521             !!ops->change_chanctx + !!ops->assign_vif_chanctx +
 522             !!ops->unassign_vif_chanctx;
 523         if (WARN_ON(i != 0 && i != 5))
 524                 return NULL;
 525         use_chanctx = i == 5;
 526
 527         /* Ensure 32-byte alignment of our private data and hw private data.
 528          * We use the wiphy priv data for both our ieee80211_local and for
 529          * the driver's private data
 530          *
 531          * In memory it'll be like this:
 532          *
 533          * +-------------------------+
 534          * | struct wiphy           |
 535          * +-------------------------+
 536          * | struct ieee80211_local  |
 537          * +-------------------------+
 538          * | driver's private data   |
 539          * +-------------------------+
 540          *
 541          */
 542         priv_size = ALIGN(sizeof(*local), NETDEV_ALIGN) + priv_data_len;
 543
 544         wiphy = wiphy_new_nm(&mac80211_config_ops, priv_size, requested_name);
 545
 546         if (!wiphy)
 547                 return NULL;
 548
 549         wiphy->mgmt_stypes = ieee80211_default_mgmt_stypes;
 550
 551         wiphy->privid = mac80211_wiphy_privid;
 552
 553         wiphy->flags |= WIPHY_FLAG_NETNS_OK |
 554                         WIPHY_FLAG_4ADDR_AP |
 555                         WIPHY_FLAG_4ADDR_STATION |
 556                         WIPHY_FLAG_REPORTS_OBSS |
 557                         WIPHY_FLAG_OFFCHAN_TX;
 558
 559         if (ops->remain_on_channel)
 560                 wiphy->flags |= WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL;
 561
 562         wiphy->features |= NL80211_FEATURE_SK_TX_STATUS |
 563                            NL80211_FEATURE_SAE |
 564                            NL80211_FEATURE_HT_IBSS |
 565                            NL80211_FEATURE_VIF_TXPOWER |
 566                            NL80211_FEATURE_MAC_ON_CREATE |
 567                            NL80211_FEATURE_USERSPACE_MPM |
 568                            NL80211_FEATURE_FULL_AP_CLIENT_STATE;
 569         wiphy_ext_feature_set(wiphy, NL80211_EXT_FEATURE_FILS_STA);
 570
 571         if (!ops->hw_scan)
 572                 wiphy->features |= NL80211_FEATURE_LOW_PRIORITY_SCAN |
 573                                    NL80211_FEATURE_AP_SCAN;
 574
 575
 576         if (!ops->set_key)
 577                 wiphy->flags |= WIPHY_FLAG_IBSS_RSN;
 578
 579         wiphy_ext_feature_set(wiphy, NL80211_EXT_FEATURE_RRM);
 580
 581         wiphy->bss_priv_size = sizeof(struct ieee80211_bss);
 582
 583         local = wiphy_priv(wiphy);
 584
 585         if (sta_info_init(local))
 586                 goto err_free;
 587
 588         local->hw.wiphy = wiphy;
 589
 590         local->hw.priv = (char *)local + ALIGN(sizeof(*local), NETDEV_ALIGN);
 591
 592         local->ops = ops;
 593         local->use_chanctx = use_chanctx;
 594
 595         /* set up some defaults */
 596         local->hw.queues = 1;
 597         local->hw.max_rates = 1;
 598         local->hw.max_report_rates = 0;
 599         local->hw.max_rx_aggregation_subframes = IEEE80211_MAX_AMPDU_BUF;
 600         local->hw.max_tx_aggregation_subframes = IEEE80211_MAX_AMPDU_BUF;
 601         local->hw.offchannel_tx_hw_queue = IEEE80211_INVAL_HW_QUEUE;
 602         local->hw.conf.long_frame_max_tx_count = wiphy->retry_long;
 603         local->hw.conf.short_frame_max_tx_count = wiphy->retry_short;
 604         local->hw.radiotap_mcs_details = IEEE80211_RADIOTAP_MCS_HAVE_MCS |
 605                                          IEEE80211_RADIOTAP_MCS_HAVE_GI |
 606                                          IEEE80211_RADIOTAP_MCS_HAVE_BW;
 607         local->hw.radiotap_vht_details = IEEE80211_RADIOTAP_VHT_KNOWN_GI |
 608                                          IEEE80211_RADIOTAP_VHT_KNOWN_BANDWIDTH;
 609         local->hw.uapsd_queues = IEEE80211_DEFAULT_UAPSD_QUEUES;
 610         local->hw.uapsd_max_sp_len = IEEE80211_DEFAULT_MAX_SP_LEN;
 611         local->user_power_level = IEEE80211_UNSET_POWER_LEVEL;
 612         wiphy->ht_capa_mod_mask = &mac80211_ht_capa_mod_mask;
 613         wiphy->vht_capa_mod_mask = &mac80211_vht_capa_mod_mask;
 614
 615         local->ext_capa[7] = WLAN_EXT_CAPA8_OPMODE_NOTIF;
 616
 617         wiphy->extended_capabilities = local->ext_capa;
 618         wiphy->extended_capabilities_mask = local->ext_capa;
 619         wiphy->extended_capabilities_len =
 620                 ARRAY_SIZE(local->ext_capa);
 621
 622         INIT_LIST_HEAD(&local->interfaces);
 623         INIT_LIST_HEAD(&local->mon_list);
 624
 625         __hw_addr_init(&local->mc_list);
 626
 627         mutex_init(&local->iflist_mtx);
 628         mutex_init(&local->mtx);
 629
 630         mutex_init(&local->key_mtx);
 631         spin_lock_init(&local->filter_lock);
 632         spin_lock_init(&local->rx_path_lock);
 633         spin_lock_init(&local->queue_stop_reason_lock);
 634
 635         INIT_LIST_HEAD(&local->chanctx_list);
 636         mutex_init(&local->chanctx_mtx);
 637
 638         INIT_DELAYED_WORK(&local->scan_work, ieee80211_scan_work);
 639
 640         INIT_WORK(&local->restart_work, ieee80211_restart_work);
 641
 642         INIT_WORK(&local->radar_detected_work,
 643                   ieee80211_dfs_radar_detected_work);
 644
 645         INIT_WORK(&local->reconfig_filter, ieee80211_reconfig_filter);
 646         local->smps_mode = IEEE80211_SMPS_OFF;
 647
 648         INIT_WORK(&local->dynamic_ps_enable_work,
 649                   ieee80211_dynamic_ps_enable_work);
 650         INIT_WORK(&local->dynamic_ps_disable_work,
 651                   ieee80211_dynamic_ps_disable_work);
 652         setup_timer(&local->dynamic_ps_timer,
 653                     ieee80211_dynamic_ps_timer, (unsigned long) local);
 654
 655         INIT_WORK(&local->sched_scan_stopped_work,
 656                   ieee80211_sched_scan_stopped_work);
 657
 658         INIT_WORK(&local->tdls_chsw_work, ieee80211_tdls_chsw_work);
 659
 660         spin_lock_init(&local->ack_status_lock);
 661         idr_init(&local->ack_status_frames);
 662
 663         for (i = 0; i < IEEE80211_MAX_QUEUES; i++) {
 664                 skb_queue_head_init(&local->pending[i]);
 665                 atomic_set(&local->agg_queue_stop[i], 0);
 666         }
 667         tasklet_init(&local->tx_pending_tasklet, ieee80211_tx_pending,
 668                      (unsigned long)local);
 669
 670         tasklet_init(&local->tasklet,
 671                      ieee80211_tasklet_handler,
 672                      (unsigned long) local);
 673
 674         skb_queue_head_init(&local->skb_queue);
 675         skb_queue_head_init(&local->skb_queue_unreliable);
 676         skb_queue_head_init(&local->skb_queue_tdls_chsw);
 677
 678         ieee80211_alloc_led_names(local);
 679
 680         ieee80211_roc_setup(local);
 681
 682         local->hw.radiotap_timestamp.units_pos = -1;
 683         local->hw.radiotap_timestamp.accuracy = -1;
 684
 685         return &local->hw;
 686  err_free:
 687         wiphy_free(wiphy);
 688         return NULL;
 689 }
 690 EXPORT_SYMBOL(ieee80211_alloc_hw_nm);
 691
 692 static int ieee80211_init_cipher_suites(struct ieee80211_local *local)
 693 {
 694         bool have_wep = !(IS_ERR(local->wep_tx_tfm) ||
 695                           IS_ERR(local->wep_rx_tfm));
 696         bool have_mfp = ieee80211_hw_check(&local->hw, MFP_CAPABLE);
 697         int n_suites = 0, r = 0, w = 0;
 698         u32 *suites;
 699         static const u32 cipher_suites[] = {
 700                 /* keep WEP first, it may be removed below */
 701                 WLAN_CIPHER_SUITE_WEP40,
 702                 WLAN_CIPHER_SUITE_WEP104,
 703                 WLAN_CIPHER_SUITE_TKIP,
 704                 WLAN_CIPHER_SUITE_CCMP,
 705                 WLAN_CIPHER_SUITE_CCMP_256,
 706                 WLAN_CIPHER_SUITE_GCMP,
 707                 WLAN_CIPHER_SUITE_GCMP_256,
 708
 709                 /* keep last -- depends on hw flags! */
 710                 WLAN_CIPHER_SUITE_AES_CMAC,
 711                 WLAN_CIPHER_SUITE_BIP_CMAC_256,
 712                 WLAN_CIPHER_SUITE_BIP_GMAC_128,
 713                 WLAN_CIPHER_SUITE_BIP_GMAC_256,
 714         };
 715
 716         if (ieee80211_hw_check(&local->hw, SW_CRYPTO_CONTROL) ||
 717             local->hw.wiphy->cipher_suites) {
 718                 /* If the driver advertises, or doesn't support SW crypto,
 719                  * we only need to remove WEP if necessary.
 720                  */
 721                 if (have_wep)
 722                         return 0;
 723
 724                 /* well if it has _no_ ciphers ... fine */
 725                 if (!local->hw.wiphy->n_cipher_suites)
 726                         return 0;
 727
 728                 /* Driver provides cipher suites, but we need to exclude WEP */
 729                 suites = kmemdup(local->hw.wiphy->cipher_suites,
 730                                  sizeof(u32) * local->hw.wiphy->n_cipher_suites,
 731                                  GFP_KERNEL);
 732                 if (!suites)
 733                         return -ENOMEM;
 734
 735                 for (r = 0; r < local->hw.wiphy->n_cipher_suites; r++) {
 736                         u32 suite = local->hw.wiphy->cipher_suites[r];
 737
 738                         if (suite == WLAN_CIPHER_SUITE_WEP40 ||
 739                             suite == WLAN_CIPHER_SUITE_WEP104)
 740                                 continue;
 741                         suites[w++] = suite;
 742                 }
 743         } else if (!local->hw.cipher_schemes) {
 744                 /* If the driver doesn't have cipher schemes, there's nothing
 745                  * else to do other than assign the (software supported and
 746                  * perhaps offloaded) cipher suites.
 747                  */
 748                 local->hw.wiphy->cipher_suites = cipher_suites;
 749                 local->hw.wiphy->n_cipher_suites = ARRAY_SIZE(cipher_suites);
 750
 751                 if (!have_mfp)
 752                         local->hw.wiphy->n_cipher_suites -= 4;
 753
 754                 if (!have_wep) {
 755                         local->hw.wiphy->cipher_suites += 2;
 756                         local->hw.wiphy->n_cipher_suites -= 2;
 757                 }
 758
 759                 /* not dynamically allocated, so just return */
 760                 return 0;
 761         } else {
 762                 const struct ieee80211_cipher_scheme *cs;
 763
 764                 cs = local->hw.cipher_schemes;
 765
 766                 /* Driver specifies cipher schemes only (but not cipher suites
 767                  * including the schemes)
 768                  *
 769                  * We start counting ciphers defined by schemes, TKIP, CCMP,
 770                  * CCMP-256, GCMP, and GCMP-256
 771                  */
 772                 n_suites = local->hw.n_cipher_schemes + 5;
 773
 774                 /* check if we have WEP40 and WEP104 */
 775                 if (have_wep)
 776                         n_suites += 2;
 777
 778                 /* check if we have AES_CMAC, BIP-CMAC-256, BIP-GMAC-128,
 779                  * BIP-GMAC-256
 780                  */
 781                 if (have_mfp)
 782                         n_suites += 4;
 783
 784                 suites = kmalloc(sizeof(u32) * n_suites, GFP_KERNEL);
 785                 if (!suites)
 786                         return -ENOMEM;
 787
 788                 suites[w++] = WLAN_CIPHER_SUITE_CCMP;
 789                 suites[w++] = WLAN_CIPHER_SUITE_CCMP_256;
 790                 suites[w++] = WLAN_CIPHER_SUITE_TKIP;
 791                 suites[w++] = WLAN_CIPHER_SUITE_GCMP;
 792                 suites[w++] = WLAN_CIPHER_SUITE_GCMP_256;
 793
 794                 if (have_wep) {
 795                         suites[w++] = WLAN_CIPHER_SUITE_WEP40;
 796                         suites[w++] = WLAN_CIPHER_SUITE_WEP104;
 797                 }
 798
 799                 if (have_mfp) {
 800                         suites[w++] = WLAN_CIPHER_SUITE_AES_CMAC;
 801                         suites[w++] = WLAN_CIPHER_SUITE_BIP_CMAC_256;
 802                         suites[w++] = WLAN_CIPHER_SUITE_BIP_GMAC_128;
 803                         suites[w++] = WLAN_CIPHER_SUITE_BIP_GMAC_256;
 804                 }
 805
 806                 for (r = 0; r < local->hw.n_cipher_schemes; r++) {
 807                         suites[w++] = cs[r].cipher;
 808                         if (WARN_ON(cs[r].pn_len > IEEE80211_MAX_PN_LEN)) {
 809                                 kfree(suites);
 810                                 return -EINVAL;
 811                         }
 812                 }
 813         }
 814
 815         local->hw.wiphy->cipher_suites = suites;
 816         local->hw.wiphy->n_cipher_suites = w;
 817         local->wiphy_ciphers_allocated = true;
 818
 819         return 0;
 820 }
 821
 822 int ieee80211_register_hw(struct ieee80211_hw *hw)
 823 {
 824         struct ieee80211_local *local = hw_to_local(hw);
 825         int result, i;
 826         enum nl80211_band band;
 827         int channels, max_bitrates;
 828         bool supp_ht, supp_vht;
 829         netdev_features_t feature_whitelist;
 830         struct cfg80211_chan_def dflt_chandef = {};
 831
 832         if (ieee80211_hw_check(hw, QUEUE_CONTROL) &&
 833             (local->hw.offchannel_tx_hw_queue == IEEE80211_INVAL_HW_QUEUE ||
 834              local->hw.offchannel_tx_hw_queue >= local->hw.queues))
 835                 return -EINVAL;
 836
 837         if ((hw->wiphy->features & NL80211_FEATURE_TDLS_CHANNEL_SWITCH) &&
 838             (!local->ops->tdls_channel_switch ||
 839              !local->ops->tdls_cancel_channel_switch ||
 840              !local->ops->tdls_recv_channel_switch))
 841                 return -EOPNOTSUPP;
 842
 843         if (WARN_ON(ieee80211_hw_check(hw, SUPPORTS_TX_FRAG) &&
 844                     !local->ops->set_frag_threshold))
 845                 return -EINVAL;
 846
 847         if (WARN_ON(local->hw.wiphy->interface_modes &
 848                         BIT(NL80211_IFTYPE_NAN) &&
 849                     (!local->ops->start_nan || !local->ops->stop_nan)))
 850                 return -EINVAL;
 851
 852 #ifdef CONFIG_PM
 853         if (hw->wiphy->wowlan && (!local->ops->suspend || !local->ops->resume))
 854                 return -EINVAL;
 855 #endif
 856
 857         if (!local->use_chanctx) {
 858                 for (i = 0; i < local->hw.wiphy->n_iface_combinations; i++) {
 859                         const struct ieee80211_iface_combination *comb;
 860
 861                         comb = &local->hw.wiphy->iface_combinations[i];
 862
 863                         if (comb->num_different_channels > 1)
 864                                 return -EINVAL;
 865                 }
 866         } else {
 867                 /*
 868                  * WDS is currently prohibited when channel contexts are used
 869                  * because there's no clear definition of which channel WDS
 870                  * type interfaces use
 871                  */
 872                 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_WDS))
 873                         return -EINVAL;
 874
 875                 /* DFS is not supported with multi-channel combinations yet */
 876                 for (i = 0; i < local->hw.wiphy->n_iface_combinations; i++) {
 877                         const struct ieee80211_iface_combination *comb;
 878
 879                         comb = &local->hw.wiphy->iface_combinations[i];
 880
 881                         if (comb->radar_detect_widths &&
 882                             comb->num_different_channels > 1)
 883                                 return -EINVAL;
 884                 }
 885         }
 886
 887         /* Only HW csum features are currently compatible with mac80211 */
 888         feature_whitelist = NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM |
 889                             NETIF_F_HW_CSUM | NETIF_F_SG | NETIF_F_HIGHDMA |
 890                             NETIF_F_GSO_SOFTWARE | NETIF_F_RXCSUM;
 891         if (WARN_ON(hw->netdev_features & ~feature_whitelist))
 892                 return -EINVAL;
 893
 894         if (hw->max_report_rates == 0)
 895                 hw->max_report_rates = hw->max_rates;
 896
 897         local->rx_chains = 1;
 898
 899         /*
 900          * generic code guarantees at least one band,
 901          * set this very early because much code assumes
 902          * that hw.conf.channel is assigned
 903          */
 904         channels = 0;
 905         max_bitrates = 0;
 906         supp_ht = false;
 907         supp_vht = false;
 908         for (band = 0; band < NUM_NL80211_BANDS; band++) {
 909                 struct ieee80211_supported_band *sband;
 910
 911                 sband = local->hw.wiphy->bands[band];
 912                 if (!sband)
 913                         continue;
 914
 915                 if (!dflt_chandef.chan) {
 916                         /*
 917                          * Assign the first enabled channel to dflt_chandef
 918                          * from the list of channels
 919                          */
 920                         for (i = 0; i < sband->n_channels; i++)
 921                                 if (!(sband->channels[i].flags &
 922                                                 IEEE80211_CHAN_DISABLED))
 923                                         break;
 924                         /* if none found then use the first anyway */
 925                         if (i == sband->n_channels)
 926                                 i = 0;
 927                         cfg80211_chandef_create(&dflt_chandef,
 928                                                 &sband->channels[i],
 929                                                 NL80211_CHAN_NO_HT);
 930                         /* init channel we're on */
 931                         if (!local->use_chanctx && !local->_oper_chandef.chan) {
 932                                 local->hw.conf.chandef = dflt_chandef;
 933                                 local->_oper_chandef = dflt_chandef;
 934                         }
 935                         local->monitor_chandef = dflt_chandef;
 936                 }
 937
 938                 channels += sband->n_channels;
 939
 940                 if (max_bitrates < sband->n_bitrates)
 941                         max_bitrates = sband->n_bitrates;
 942                 supp_ht = supp_ht || sband->ht_cap.ht_supported;
 943                 supp_vht = supp_vht || sband->vht_cap.vht_supported;
 944
 945                 if (!sband->ht_cap.ht_supported)
 946                         continue;
 947
 948                 /* TODO: consider VHT for RX chains, hopefully it's the same */
 949                 local->rx_chains =
 950                         max(ieee80211_mcs_to_chains(&sband->ht_cap.mcs),
 951                             local->rx_chains);
 952
 953                 /* no need to mask, SM_PS_DISABLED has all bits set */
 954                 sband->ht_cap.cap |= WLAN_HT_CAP_SM_PS_DISABLED <<
 955                                      IEEE80211_HT_CAP_SM_PS_SHIFT;
 956         }
 957
 958         /* if low-level driver supports AP, we also support VLAN */
 959         if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_AP)) {
 960                 hw->wiphy->interface_modes |= BIT(NL80211_IFTYPE_AP_VLAN);
 961                 hw->wiphy->software_iftypes |= BIT(NL80211_IFTYPE_AP_VLAN);
 962         }
 963
 964         /* mac80211 always supports monitor */
 965         hw->wiphy->interface_modes |= BIT(NL80211_IFTYPE_MONITOR);
 966         hw->wiphy->software_iftypes |= BIT(NL80211_IFTYPE_MONITOR);
 967
 968         /* mac80211 doesn't support more than one IBSS interface right now */
 969         for (i = 0; i < hw->wiphy->n_iface_combinations; i++) {
 970                 const struct ieee80211_iface_combination *c;
 971                 int j;
 972
 973                 c = &hw->wiphy->iface_combinations[i];
 974
 975                 for (j = 0; j < c->n_limits; j++)
 976                         if ((c->limits[j].types & BIT(NL80211_IFTYPE_ADHOC)) &&
 977                             c->limits[j].max > 1)
 978                                 return -EINVAL;
 979         }
 980
 981         local->int_scan_req = kzalloc(sizeof(*local->int_scan_req) +
 982                                       sizeof(void *) * channels, GFP_KERNEL);
 983         if (!local->int_scan_req)
 984                 return -ENOMEM;
 985
 986         for (band = 0; band < NUM_NL80211_BANDS; band++) {
 987                 if (!local->hw.wiphy->bands[band])
 988                         continue;
 989                 local->int_scan_req->rates[band] = (u32) -1;
 990         }
 991
 992 #ifndef CONFIG_MAC80211_MESH
 993         /* mesh depends on Kconfig, but drivers should set it if they want */
 994         local->hw.wiphy->interface_modes &= ~BIT(NL80211_IFTYPE_MESH_POINT);
 995 #endif
 996
 997         /* if the underlying driver supports mesh, mac80211 will (at least)
 998          * provide routing of mesh authentication frames to userspace */
 999         if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_MESH_POINT))
1000                 local->hw.wiphy->flags |= WIPHY_FLAG_MESH_AUTH;
1001
1002         /* mac80211 supports control port protocol changing */
1003         local->hw.wiphy->flags |= WIPHY_FLAG_CONTROL_PORT_PROTOCOL;
1004
1005         if (ieee80211_hw_check(&local->hw, SIGNAL_DBM)) {
1006                 local->hw.wiphy->signal_type = CFG80211_SIGNAL_TYPE_MBM;
1007         } else if (ieee80211_hw_check(&local->hw, SIGNAL_UNSPEC)) {
1008                 local->hw.wiphy->signal_type = CFG80211_SIGNAL_TYPE_UNSPEC;
1009                 if (hw->max_signal <= 0) {
1010                         result = -EINVAL;
1011                         goto fail_wiphy_register;
1012                 }
1013         }
1014
1015         /*
1016          * Calculate scan IE length -- we need this to alloc
1017          * memory and to subtract from the driver limit. It
1018          * includes the DS Params, (extended) supported rates, and HT
1019          * information -- SSID is the driver's responsibility.
1020          */
1021         local->scan_ies_len = 4 + max_bitrates /* (ext) supp rates */ +
1022                 3 /* DS Params */;
1023         if (supp_ht)
1024                 local->scan_ies_len += 2 + sizeof(struct ieee80211_ht_cap);
1025
1026         if (supp_vht)
1027                 local->scan_ies_len +=
1028                         2 + sizeof(struct ieee80211_vht_cap);
1029
1030         if (!local->ops->hw_scan) {
1031                 /* For hw_scan, driver needs to set these up. */
1032                 local->hw.wiphy->max_scan_ssids = 4;
1033                 local->hw.wiphy->max_scan_ie_len = IEEE80211_MAX_DATA_LEN;
1034         }
1035
1036         /*
1037          * If the driver supports any scan IEs, then assume the
1038          * limit includes the IEs mac80211 will add, otherwise
1039          * leave it at zero and let the driver sort it out; we
1040          * still pass our IEs to the driver but userspace will
1041          * not be allowed to in that case.
1042          */
1043         if (local->hw.wiphy->max_scan_ie_len)
1044                 local->hw.wiphy->max_scan_ie_len -= local->scan_ies_len;
1045
1046         if (WARN_ON(!ieee80211_cs_list_valid(local->hw.cipher_schemes,
1047                                              local->hw.n_cipher_schemes))) {
1048                 result = -EINVAL;
1049                 goto fail_workqueue;
1050         }
1051
1052         result = ieee80211_init_cipher_suites(local);
1053         if (result < 0)
1054                 goto fail_wiphy_register;
1055
1056         if (!local->ops->remain_on_channel)
1057                 local->hw.wiphy->max_remain_on_channel_duration = 5000;
1058
1059         /* mac80211 based drivers don't support internal TDLS setup */
1060         if (local->hw.wiphy->flags & WIPHY_FLAG_SUPPORTS_TDLS)
1061                 local->hw.wiphy->flags |= WIPHY_FLAG_TDLS_EXTERNAL_SETUP;
1062
1063         /* mac80211 supports eCSA, if the driver supports STA CSA at all */
1064         if (ieee80211_hw_check(&local->hw, CHANCTX_STA_CSA))
1065                 local->ext_capa[0] |= WLAN_EXT_CAPA1_EXT_CHANNEL_SWITCHING;
1066
1067         local->hw.wiphy->max_num_csa_counters = IEEE80211_MAX_CSA_COUNTERS_NUM;
1068
1069         result = wiphy_register(local->hw.wiphy);
1070         if (result < 0)
1071                 goto fail_wiphy_register;
1072
1073         /*
1074          * We use the number of queues for feature tests (QoS, HT) internally
1075          * so restrict them appropriately.
1076          */
1077         if (hw->queues > IEEE80211_MAX_QUEUES)
1078                 hw->queues = IEEE80211_MAX_QUEUES;
1079
1080         local->workqueue =
1081                 alloc_ordered_workqueue("%s", 0, wiphy_name(local->hw.wiphy));
1082         if (!local->workqueue) {
1083                 result = -ENOMEM;
1084                 goto fail_workqueue;
1085         }
1086
1087         /*
1088          * The hardware needs headroom for sending the frame,
1089          * and we need some headroom for passing the frame to monitor
1090          * interfaces, but never both at the same time.
1091          */
1092         local->tx_headroom = max_t(unsigned int , local->hw.extra_tx_headroom,
1093                                    IEEE80211_TX_STATUS_HEADROOM);
1094
1095         debugfs_hw_add(local);
1096
1097         /*
1098          * if the driver doesn't specify a max listen interval we
1099          * use 5 which should be a safe default
1100          */
1101         if (local->hw.max_listen_interval == 0)
1102                 local->hw.max_listen_interval = 5;
1103
1104         local->hw.conf.listen_interval = local->hw.max_listen_interval;
1105
1106         local->dynamic_ps_forced_timeout = -1;
1107
1108         if (!local->hw.max_nan_de_entries)
1109                 local->hw.max_nan_de_entries = IEEE80211_MAX_NAN_INSTANCE_ID;
1110
1111         result = ieee80211_wep_init(local);
1112         if (result < 0)
1113                 wiphy_debug(local->hw.wiphy, "Failed to initialize wep: %d\n",
1114                             result);
1115
1116         local->hw.conf.flags = IEEE80211_CONF_IDLE;
1117
1118         ieee80211_led_init(local);
1119
1120         rtnl_lock();
1121
1122         result = ieee80211_init_rate_ctrl_alg(local,
1123                                               hw->rate_control_algorithm);
1124         if (result < 0) {
1125                 wiphy_debug(local->hw.wiphy,
1126                             "Failed to initialize rate control algorithm\n");
1127                 goto fail_rate;
1128         }
1129
1130         /* add one default STA interface if supported */
1131         if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_STATION) &&
1132             !ieee80211_hw_check(hw, NO_AUTO_VIF)) {
1133                 result = ieee80211_if_add(local, "wlan%d", NET_NAME_ENUM, NULL,
1134                                           NL80211_IFTYPE_STATION, NULL);
1135                 if (result)
1136                         wiphy_warn(local->hw.wiphy,
1137                                    "Failed to add default virtual iface\n");
1138         }
1139
1140         rtnl_unlock();
1141
1142         result = ieee80211_txq_setup_flows(local);
1143         if (result)
1144                 goto fail_flows;
1145
1146 #ifdef CONFIG_INET
1147         local->ifa_notifier.notifier_call = ieee80211_ifa_changed;
1148         result = register_inetaddr_notifier(&local->ifa_notifier);
1149         if (result)
1150                 goto fail_ifa;
1151 #endif
1152
1153 #if IS_ENABLED(CONFIG_IPV6)
1154         local->ifa6_notifier.notifier_call = ieee80211_ifa6_changed;
1155         result = register_inet6addr_notifier(&local->ifa6_notifier);
1156         if (result)
1157                 goto fail_ifa6;
1158 #endif
1159
1160         return 0;
1161
1162 #if IS_ENABLED(CONFIG_IPV6)
1163  fail_ifa6:
1164 #ifdef CONFIG_INET
1165         unregister_inetaddr_notifier(&local->ifa_notifier);
1166 #endif
1167 #endif
1168 #if defined(CONFIG_INET) || defined(CONFIG_IPV6)
1169  fail_ifa:
1170 #endif
1171         ieee80211_txq_teardown_flows(local);
1172  fail_flows:
1173         rtnl_lock();
1174         rate_control_deinitialize(local);
1175         ieee80211_remove_interfaces(local);
1176  fail_rate:
1177         rtnl_unlock();
1178         ieee80211_led_exit(local);
1179         ieee80211_wep_free(local);
1180         destroy_workqueue(local->workqueue);
1181  fail_workqueue:
1182         wiphy_unregister(local->hw.wiphy);
1183  fail_wiphy_register:
1184         if (local->wiphy_ciphers_allocated)
1185                 kfree(local->hw.wiphy->cipher_suites);
1186         kfree(local->int_scan_req);
1187         return result;
1188 }
1189 EXPORT_SYMBOL(ieee80211_register_hw);
1190
1191 void ieee80211_unregister_hw(struct ieee80211_hw *hw)
1192 {
1193         struct ieee80211_local *local = hw_to_local(hw);
1194
1195         tasklet_kill(&local->tx_pending_tasklet);
1196         tasklet_kill(&local->tasklet);
1197
1198 #ifdef CONFIG_INET
1199         unregister_inetaddr_notifier(&local->ifa_notifier);
1200 #endif
1201 #if IS_ENABLED(CONFIG_IPV6)
1202         unregister_inet6addr_notifier(&local->ifa6_notifier);
1203 #endif
1204         ieee80211_txq_teardown_flows(local);
1205
1206         rtnl_lock();
1207
1208         /*
1209          * At this point, interface list manipulations are fine
1210          * because the driver cannot be handing us frames any
1211          * more and the tasklet is killed.
1212          */
1213         ieee80211_remove_interfaces(local);
1214
1215         rtnl_unlock();
1216
1217         cancel_delayed_work_sync(&local->roc_work);
1218         cancel_work_sync(&local->restart_work);
1219         cancel_work_sync(&local->reconfig_filter);
1220         cancel_work_sync(&local->tdls_chsw_work);
1221         flush_work(&local->sched_scan_stopped_work);
1222         flush_work(&local->radar_detected_work);
1223
1224         ieee80211_clear_tx_pending(local);
1225         rate_control_deinitialize(local);
1226
1227         if (skb_queue_len(&local->skb_queue) ||
1228             skb_queue_len(&local->skb_queue_unreliable))
1229                 wiphy_warn(local->hw.wiphy, "skb_queue not empty\n");
1230         skb_queue_purge(&local->skb_queue);
1231         skb_queue_purge(&local->skb_queue_unreliable);
1232         skb_queue_purge(&local->skb_queue_tdls_chsw);
1233
1234         destroy_workqueue(local->workqueue);
1235         wiphy_unregister(local->hw.wiphy);
1236         ieee80211_wep_free(local);
1237         ieee80211_led_exit(local);
1238         kfree(local->int_scan_req);
1239 }
1240 EXPORT_SYMBOL(ieee80211_unregister_hw);
1241
1242 static int ieee80211_free_ack_frame(int id, void *p, void *data)
1243 {
1244         WARN_ONCE(1, "Have pending ack frames!\n");
1245         kfree_skb(p);
1246         return 0;
1247 }
1248
1249 void ieee80211_free_hw(struct ieee80211_hw *hw)
1250 {
1251         struct ieee80211_local *local = hw_to_local(hw);
1252
1253         mutex_destroy(&local->iflist_mtx);
1254         mutex_destroy(&local->mtx);
1255
1256         if (local->wiphy_ciphers_allocated)
1257                 kfree(local->hw.wiphy->cipher_suites);
1258
1259         idr_for_each(&local->ack_status_frames,
1260                      ieee80211_free_ack_frame, NULL);
1261         idr_destroy(&local->ack_status_frames);
1262
1263         sta_info_stop(local);
1264
1265         ieee80211_free_led_names(local);
1266
1267         wiphy_free(local->hw.wiphy);
1268 }
1269 EXPORT_SYMBOL(ieee80211_free_hw);
1270
1271 static int __init ieee80211_init(void)
1272 {
1273         struct sk_buff *skb;
1274         int ret;
1275
1276         BUILD_BUG_ON(sizeof(struct ieee80211_tx_info) > sizeof(skb->cb));
1277         BUILD_BUG_ON(offsetof(struct ieee80211_tx_info, driver_data) +
1278                      IEEE80211_TX_INFO_DRIVER_DATA_SIZE > sizeof(skb->cb));
1279
1280         ret = rc80211_minstrel_init();
1281         if (ret)
1282                 return ret;
1283
1284         ret = rc80211_minstrel_ht_init();
1285         if (ret)
1286                 goto err_minstrel;
1287
1288         ret = ieee80211_iface_init();
1289         if (ret)
1290                 goto err_netdev;
1291
1292         return 0;
1293  err_netdev:
1294         rc80211_minstrel_ht_exit();
1295  err_minstrel:
1296         rc80211_minstrel_exit();
1297
1298         return ret;
1299 }
1300
1301 static void __exit ieee80211_exit(void)
1302 {
1303         rc80211_minstrel_ht_exit();
1304         rc80211_minstrel_exit();
1305
1306         ieee80211s_stop();
1307
1308         ieee80211_iface_exit();
1309
1310         rcu_barrier();
1311 }
1312
1313
1314 subsys_initcall(ieee80211_init);
1315 module_exit(ieee80211_exit);
1316
1317 MODULE_DESCRIPTION("IEEE 802.11 subsystem");
1318 MODULE_LICENSE("GPL");