kernel/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/pm_qos.h>
  24 #include <linux/inetdevice.h>
  25 #include <net/net_namespace.h>
  26 #include <net/cfg80211.h>
  27 #include <net/addrconf.h>
  28
  29 #include "ieee80211_i.h"
  30 #include "driver-ops.h"
  31 #include "rate.h"
  32 #include "mesh.h"
  33 #include "wep.h"
  34 #include "led.h"
  35 #include "cfg.h"
  36 #include "debugfs.h"
  37
  38 void ieee80211_configure_filter(struct ieee80211_local *local)
  39 {
  40         u64 mc;
  41         unsigned int changed_flags;
  42         unsigned int new_flags = 0;
  43
  44         if (atomic_read(&local->iff_promiscs))
  45                 new_flags |= FIF_PROMISC_IN_BSS;
  46
  47         if (atomic_read(&local->iff_allmultis))
  48                 new_flags |= FIF_ALLMULTI;
  49
  50         if (local->monitors || test_bit(SCAN_SW_SCANNING, &local->scanning) ||
  51             test_bit(SCAN_ONCHANNEL_SCANNING, &local->scanning))
  52                 new_flags |= FIF_BCN_PRBRESP_PROMISC;
  53
  54         if (local->fif_probe_req || local->probe_req_reg)
  55                 new_flags |= FIF_PROBE_REQ;
  56
  57         if (local->fif_fcsfail)
  58                 new_flags |= FIF_FCSFAIL;
  59
  60         if (local->fif_plcpfail)
  61                 new_flags |= FIF_PLCPFAIL;
  62
  63         if (local->fif_control)
  64                 new_flags |= FIF_CONTROL;
  65
  66         if (local->fif_other_bss)
  67                 new_flags |= FIF_OTHER_BSS;
  68
  69         if (local->fif_pspoll)
  70                 new_flags |= FIF_PSPOLL;
  71
  72         spin_lock_bh(&local->filter_lock);
  73         changed_flags = local->filter_flags ^ new_flags;
  74
  75         mc = drv_prepare_multicast(local, &local->mc_list);
  76         spin_unlock_bh(&local->filter_lock);
  77
  78         /* be a bit nasty */
  79         new_flags |= (1<<31);
  80
  81         drv_configure_filter(local, changed_flags, &new_flags, mc);
  82
  83         WARN_ON(new_flags & (1<<31));
  84
  85         local->filter_flags = new_flags & ~(1<<31);
  86 }
  87
  88 static void ieee80211_reconfig_filter(struct work_struct *work)
  89 {
  90         struct ieee80211_local *local =
  91                 container_of(work, struct ieee80211_local, reconfig_filter);
  92
  93         ieee80211_configure_filter(local);
  94 }
  95
  96 static u32 ieee80211_hw_conf_chan(struct ieee80211_local *local)
  97 {
  98         struct ieee80211_sub_if_data *sdata;
  99         struct cfg80211_chan_def chandef = {};
 100         u32 changed = 0;
 101         int power;
 102         u32 offchannel_flag;
 103
 104         offchannel_flag = local->hw.conf.flags & IEEE80211_CONF_OFFCHANNEL;
 105
 106         if (local->scan_chandef.chan) {
 107                 chandef = local->scan_chandef;
 108         } else if (local->tmp_channel) {
 109                 chandef.chan = local->tmp_channel;
 110                 chandef.width = NL80211_CHAN_WIDTH_20_NOHT;
 111                 chandef.center_freq1 = chandef.chan->center_freq;
 112         } else
 113                 chandef = local->_oper_chandef;
 114
 115         WARN(!cfg80211_chandef_valid(&chandef),
 116              "control:%d MHz width:%d center: %d/%d MHz",
 117              chandef.chan->center_freq, chandef.width,
 118              chandef.center_freq1, 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                 power = min(power, sdata->vif.bss_conf.txpower);
 155         }
 156         rcu_read_unlock();
 157
 158         if (local->hw.conf.power_level != power) {
 159                 changed |= IEEE80211_CONF_CHANGE_POWER;
 160                 local->hw.conf.power_level = power;
 161         }
 162
 163         return changed;
 164 }
 165
 166 int ieee80211_hw_config(struct ieee80211_local *local, u32 changed)
 167 {
 168         int ret = 0;
 169
 170         might_sleep();
 171
 172         if (!local->use_chanctx)
 173                 changed |= ieee80211_hw_conf_chan(local);
 174         else
 175                 changed &= ~(IEEE80211_CONF_CHANGE_CHANNEL |
 176                              IEEE80211_CONF_CHANGE_POWER);
 177
 178         if (changed && local->open_count) {
 179                 ret = drv_config(local, changed);
 180                 /*
 181                  * Goal:
 182                  * HW reconfiguration should never fail, the driver has told
 183                  * us what it can support so it should live up to that promise.
 184                  *
 185                  * Current status:
 186                  * rfkill is not integrated with mac80211 and a
 187                  * configuration command can thus fail if hardware rfkill
 188                  * is enabled
 189                  *
 190                  * FIXME: integrate rfkill with mac80211 and then add this
 191                  * WARN_ON() back
 192                  *
 193                  */
 194                 /* WARN_ON(ret); */
 195         }
 196
 197         return ret;
 198 }
 199
 200 void ieee80211_bss_info_change_notify(struct ieee80211_sub_if_data *sdata,
 201                                       u32 changed)
 202 {
 203         struct ieee80211_local *local = sdata->local;
 204
 205         if (!changed || sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
 206                 return;
 207
 208         drv_bss_info_changed(local, sdata, &sdata->vif.bss_conf, changed);
 209 }
 210
 211 u32 ieee80211_reset_erp_info(struct ieee80211_sub_if_data *sdata)
 212 {
 213         sdata->vif.bss_conf.use_cts_prot = false;
 214         sdata->vif.bss_conf.use_short_preamble = false;
 215         sdata->vif.bss_conf.use_short_slot = false;
 216         return BSS_CHANGED_ERP_CTS_PROT |
 217                BSS_CHANGED_ERP_PREAMBLE |
 218                BSS_CHANGED_ERP_SLOT;
 219 }
 220
 221 static void ieee80211_tasklet_handler(unsigned long data)
 222 {
 223         struct ieee80211_local *local = (struct ieee80211_local *) data;
 224         struct sk_buff *skb;
 225
 226         while ((skb = skb_dequeue(&local->skb_queue)) ||
 227                (skb = skb_dequeue(&local->skb_queue_unreliable))) {
 228                 switch (skb->pkt_type) {
 229                 case IEEE80211_RX_MSG:
 230                         /* Clear skb->pkt_type in order to not confuse kernel
 231                          * netstack. */
 232                         skb->pkt_type = 0;
 233                         ieee80211_rx(&local->hw, skb);
 234                         break;
 235                 case IEEE80211_TX_STATUS_MSG:
 236                         skb->pkt_type = 0;
 237                         ieee80211_tx_status(&local->hw, skb);
 238                         break;
 239                 default:
 240                         WARN(1, "mac80211: Packet is of unknown type %d\n",
 241                              skb->pkt_type);
 242                         dev_kfree_skb(skb);
 243                         break;
 244                 }
 245         }
 246 }
 247
 248 static void ieee80211_restart_work(struct work_struct *work)
 249 {
 250         struct ieee80211_local *local =
 251                 container_of(work, struct ieee80211_local, restart_work);
 252         struct ieee80211_sub_if_data *sdata;
 253
 254         /* wait for scan work complete */
 255         flush_workqueue(local->workqueue);
 256
 257         WARN(test_bit(SCAN_HW_SCANNING, &local->scanning),
 258              "%s called with hardware scan in progress\n", __func__);
 259
 260         rtnl_lock();
 261         list_for_each_entry(sdata, &local->interfaces, list)
 262                 flush_delayed_work(&sdata->dec_tailroom_needed_wk);
 263         ieee80211_scan_cancel(local);
 264         ieee80211_reconfig(local);
 265         rtnl_unlock();
 266 }
 267
 268 void ieee80211_restart_hw(struct ieee80211_hw *hw)
 269 {
 270         struct ieee80211_local *local = hw_to_local(hw);
 271
 272         trace_api_restart_hw(local);
 273
 274         wiphy_info(hw->wiphy,
 275                    "Hardware restart was requested\n");
 276
 277         /* use this reason, ieee80211_reconfig will unblock it */
 278         ieee80211_stop_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP,
 279                                         IEEE80211_QUEUE_STOP_REASON_SUSPEND,
 280                                         false);
 281
 282         /*
 283          * Stop all Rx during the reconfig. We don't want state changes
 284          * or driver callbacks while this is in progress.
 285          */
 286         local->in_reconfig = true;
 287         barrier();
 288
 289         schedule_work(&local->restart_work);
 290 }
 291 EXPORT_SYMBOL(ieee80211_restart_hw);
 292
 293 #ifdef CONFIG_INET
 294 static int ieee80211_ifa_changed(struct notifier_block *nb,
 295                                  unsigned long data, void *arg)
 296 {
 297         struct in_ifaddr *ifa = arg;
 298         struct ieee80211_local *local =
 299                 container_of(nb, struct ieee80211_local,
 300                              ifa_notifier);
 301         struct net_device *ndev = ifa->ifa_dev->dev;
 302         struct wireless_dev *wdev = ndev->ieee80211_ptr;
 303         struct in_device *idev;
 304         struct ieee80211_sub_if_data *sdata;
 305         struct ieee80211_bss_conf *bss_conf;
 306         struct ieee80211_if_managed *ifmgd;
 307         int c = 0;
 308
 309         /* Make sure it's our interface that got changed */
 310         if (!wdev)
 311                 return NOTIFY_DONE;
 312
 313         if (wdev->wiphy != local->hw.wiphy)
 314                 return NOTIFY_DONE;
 315
 316         sdata = IEEE80211_DEV_TO_SUB_IF(ndev);
 317         bss_conf = &sdata->vif.bss_conf;
 318
 319         /* ARP filtering is only supported in managed mode */
 320         if (sdata->vif.type != NL80211_IFTYPE_STATION)
 321                 return NOTIFY_DONE;
 322
 323         idev = __in_dev_get_rtnl(sdata->dev);
 324         if (!idev)
 325                 return NOTIFY_DONE;
 326
 327         ifmgd = &sdata->u.mgd;
 328         sdata_lock(sdata);
 329
 330         /* Copy the addresses to the bss_conf list */
 331         ifa = idev->ifa_list;
 332         while (ifa) {
 333                 if (c < IEEE80211_BSS_ARP_ADDR_LIST_LEN)
 334                         bss_conf->arp_addr_list[c] = ifa->ifa_address;
 335                 ifa = ifa->ifa_next;
 336                 c++;
 337         }
 338
 339         bss_conf->arp_addr_cnt = c;
 340
 341         /* Configure driver only if associated (which also implies it is up) */
 342         if (ifmgd->associated)
 343                 ieee80211_bss_info_change_notify(sdata,
 344                                                  BSS_CHANGED_ARP_FILTER);
 345
 346         sdata_unlock(sdata);
 347
 348         return NOTIFY_OK;
 349 }
 350 #endif
 351
 352 #if IS_ENABLED(CONFIG_IPV6)
 353 static int ieee80211_ifa6_changed(struct notifier_block *nb,
 354                                   unsigned long data, void *arg)
 355 {
 356         struct inet6_ifaddr *ifa = (struct inet6_ifaddr *)arg;
 357         struct inet6_dev *idev = ifa->idev;
 358         struct net_device *ndev = ifa->idev->dev;
 359         struct ieee80211_local *local =
 360                 container_of(nb, struct ieee80211_local, ifa6_notifier);
 361         struct wireless_dev *wdev = ndev->ieee80211_ptr;
 362         struct ieee80211_sub_if_data *sdata;
 363
 364         /* Make sure it's our interface that got changed */
 365         if (!wdev || wdev->wiphy != local->hw.wiphy)
 366                 return NOTIFY_DONE;
 367
 368         sdata = IEEE80211_DEV_TO_SUB_IF(ndev);
 369
 370         /*
 371          * For now only support station mode. This is mostly because
 372          * doing AP would have to handle AP_VLAN in some way ...
 373          */
 374         if (sdata->vif.type != NL80211_IFTYPE_STATION)
 375                 return NOTIFY_DONE;
 376
 377         drv_ipv6_addr_change(local, sdata, idev);
 378
 379         return NOTIFY_OK;
 380 }
 381 #endif
 382
 383 /* There isn't a lot of sense in it, but you can transmit anything you like */
 384 static const struct ieee80211_txrx_stypes
 385 ieee80211_default_mgmt_stypes[NUM_NL80211_IFTYPES] = {
 386         [NL80211_IFTYPE_ADHOC] = {
 387                 .tx = 0xffff,
 388                 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
 389                         BIT(IEEE80211_STYPE_AUTH >> 4) |
 390                         BIT(IEEE80211_STYPE_DEAUTH >> 4) |
 391                         BIT(IEEE80211_STYPE_PROBE_REQ >> 4),
 392         },
 393         [NL80211_IFTYPE_STATION] = {
 394                 .tx = 0xffff,
 395                 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
 396                         BIT(IEEE80211_STYPE_PROBE_REQ >> 4),
 397         },
 398         [NL80211_IFTYPE_AP] = {
 399                 .tx = 0xffff,
 400                 .rx = BIT(IEEE80211_STYPE_ASSOC_REQ >> 4) |
 401                         BIT(IEEE80211_STYPE_REASSOC_REQ >> 4) |
 402                         BIT(IEEE80211_STYPE_PROBE_REQ >> 4) |
 403                         BIT(IEEE80211_STYPE_DISASSOC >> 4) |
 404                         BIT(IEEE80211_STYPE_AUTH >> 4) |
 405                         BIT(IEEE80211_STYPE_DEAUTH >> 4) |
 406                         BIT(IEEE80211_STYPE_ACTION >> 4),
 407         },
 408         [NL80211_IFTYPE_AP_VLAN] = {
 409                 /* copy AP */
 410                 .tx = 0xffff,
 411                 .rx = BIT(IEEE80211_STYPE_ASSOC_REQ >> 4) |
 412                         BIT(IEEE80211_STYPE_REASSOC_REQ >> 4) |
 413                         BIT(IEEE80211_STYPE_PROBE_REQ >> 4) |
 414                         BIT(IEEE80211_STYPE_DISASSOC >> 4) |
 415                         BIT(IEEE80211_STYPE_AUTH >> 4) |
 416                         BIT(IEEE80211_STYPE_DEAUTH >> 4) |
 417                         BIT(IEEE80211_STYPE_ACTION >> 4),
 418         },
 419         [NL80211_IFTYPE_P2P_CLIENT] = {
 420                 .tx = 0xffff,
 421                 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
 422                         BIT(IEEE80211_STYPE_PROBE_REQ >> 4),
 423         },
 424         [NL80211_IFTYPE_P2P_GO] = {
 425                 .tx = 0xffff,
 426                 .rx = BIT(IEEE80211_STYPE_ASSOC_REQ >> 4) |
 427                         BIT(IEEE80211_STYPE_REASSOC_REQ >> 4) |
 428                         BIT(IEEE80211_STYPE_PROBE_REQ >> 4) |
 429                         BIT(IEEE80211_STYPE_DISASSOC >> 4) |
 430                         BIT(IEEE80211_STYPE_AUTH >> 4) |
 431                         BIT(IEEE80211_STYPE_DEAUTH >> 4) |
 432                         BIT(IEEE80211_STYPE_ACTION >> 4),
 433         },
 434         [NL80211_IFTYPE_MESH_POINT] = {
 435                 .tx = 0xffff,
 436                 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
 437                         BIT(IEEE80211_STYPE_AUTH >> 4) |
 438                         BIT(IEEE80211_STYPE_DEAUTH >> 4),
 439         },
 440         [NL80211_IFTYPE_P2P_DEVICE] = {
 441                 .tx = 0xffff,
 442                 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
 443                         BIT(IEEE80211_STYPE_PROBE_REQ >> 4),
 444         },
 445 };
 446
 447 static const struct ieee80211_ht_cap mac80211_ht_capa_mod_mask = {
 448         .ampdu_params_info = IEEE80211_HT_AMPDU_PARM_FACTOR |
 449                              IEEE80211_HT_AMPDU_PARM_DENSITY,
 450
 451         .cap_info = cpu_to_le16(IEEE80211_HT_CAP_SUP_WIDTH_20_40 |
 452                                 IEEE80211_HT_CAP_MAX_AMSDU |
 453                                 IEEE80211_HT_CAP_SGI_20 |
 454                                 IEEE80211_HT_CAP_SGI_40 |
 455                                 IEEE80211_HT_CAP_LDPC_CODING |
 456                                 IEEE80211_HT_CAP_40MHZ_INTOLERANT),
 457         .mcs = {
 458                 .rx_mask = { 0xff, 0xff, 0xff, 0xff, 0xff,
 459                              0xff, 0xff, 0xff, 0xff, 0xff, },
 460         },
 461 };
 462
 463 static const struct ieee80211_vht_cap mac80211_vht_capa_mod_mask = {
 464         .vht_cap_info =
 465                 cpu_to_le32(IEEE80211_VHT_CAP_RXLDPC |
 466                             IEEE80211_VHT_CAP_SHORT_GI_80 |
 467                             IEEE80211_VHT_CAP_SHORT_GI_160 |
 468                             IEEE80211_VHT_CAP_RXSTBC_1 |
 469                             IEEE80211_VHT_CAP_RXSTBC_2 |
 470                             IEEE80211_VHT_CAP_RXSTBC_3 |
 471                             IEEE80211_VHT_CAP_RXSTBC_4 |
 472                             IEEE80211_VHT_CAP_TXSTBC |
 473                             IEEE80211_VHT_CAP_SU_BEAMFORMER_CAPABLE |
 474                             IEEE80211_VHT_CAP_SU_BEAMFORMEE_CAPABLE |
 475                             IEEE80211_VHT_CAP_TX_ANTENNA_PATTERN |
 476                             IEEE80211_VHT_CAP_RX_ANTENNA_PATTERN |
 477                             IEEE80211_VHT_CAP_MAX_A_MPDU_LENGTH_EXPONENT_MASK),
 478         .supp_mcs = {
 479                 .rx_mcs_map = cpu_to_le16(~0),
 480                 .tx_mcs_map = cpu_to_le16(~0),
 481         },
 482 };
 483
 484 struct ieee80211_hw *ieee80211_alloc_hw_nm(size_t priv_data_len,
 485                                            const struct ieee80211_ops *ops,
 486                                            const char *requested_name)
 487 {
 488         struct ieee80211_local *local;
 489         int priv_size, i;
 490         struct wiphy *wiphy;
 491         bool use_chanctx;
 492
 493         if (WARN_ON(!ops->tx || !ops->start || !ops->stop || !ops->config ||
 494                     !ops->add_interface || !ops->remove_interface ||
 495                     !ops->configure_filter))
 496                 return NULL;
 497
 498         if (WARN_ON(ops->sta_state && (ops->sta_add || ops->sta_remove)))
 499                 return NULL;
 500
 501         /* check all or no channel context operations exist */
 502         i = !!ops->add_chanctx + !!ops->remove_chanctx +
 503             !!ops->change_chanctx + !!ops->assign_vif_chanctx +
 504             !!ops->unassign_vif_chanctx;
 505         if (WARN_ON(i != 0 && i != 5))
 506                 return NULL;
 507         use_chanctx = i == 5;
 508
 509         /* Ensure 32-byte alignment of our private data and hw private data.
 510          * We use the wiphy priv data for both our ieee80211_local and for
 511          * the driver's private data
 512          *
 513          * In memory it'll be like this:
 514          *
 515          * +-------------------------+
 516          * | struct wiphy           |
 517          * +-------------------------+
 518          * | struct ieee80211_local  |
 519          * +-------------------------+
 520          * | driver's private data   |
 521          * +-------------------------+
 522          *
 523          */
 524         priv_size = ALIGN(sizeof(*local), NETDEV_ALIGN) + priv_data_len;
 525
 526         wiphy = wiphy_new_nm(&mac80211_config_ops, priv_size, requested_name);
 527
 528         if (!wiphy)
 529                 return NULL;
 530
 531         wiphy->mgmt_stypes = ieee80211_default_mgmt_stypes;
 532
 533         wiphy->privid = mac80211_wiphy_privid;
 534
 535         wiphy->flags |= WIPHY_FLAG_NETNS_OK |
 536                         WIPHY_FLAG_4ADDR_AP |
 537                         WIPHY_FLAG_4ADDR_STATION |
 538                         WIPHY_FLAG_REPORTS_OBSS |
 539                         WIPHY_FLAG_OFFCHAN_TX;
 540
 541         if (ops->remain_on_channel)
 542                 wiphy->flags |= WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL;
 543
 544         wiphy->features |= NL80211_FEATURE_SK_TX_STATUS |
 545                            NL80211_FEATURE_SAE |
 546                            NL80211_FEATURE_HT_IBSS |
 547                            NL80211_FEATURE_VIF_TXPOWER |
 548                            NL80211_FEATURE_MAC_ON_CREATE |
 549                            NL80211_FEATURE_USERSPACE_MPM;
 550
 551         if (!ops->hw_scan)
 552                 wiphy->features |= NL80211_FEATURE_LOW_PRIORITY_SCAN |
 553                                    NL80211_FEATURE_AP_SCAN;
 554
 555
 556         if (!ops->set_key)
 557                 wiphy->flags |= WIPHY_FLAG_IBSS_RSN;
 558
 559         wiphy->bss_priv_size = sizeof(struct ieee80211_bss);
 560
 561         local = wiphy_priv(wiphy);
 562
 563         if (sta_info_init(local))
 564                 goto err_free;
 565
 566         local->hw.wiphy = wiphy;
 567
 568         local->hw.priv = (char *)local + ALIGN(sizeof(*local), NETDEV_ALIGN);
 569
 570         local->ops = ops;
 571         local->use_chanctx = use_chanctx;
 572
 573         /* set up some defaults */
 574         local->hw.queues = 1;
 575         local->hw.max_rates = 1;
 576         local->hw.max_report_rates = 0;
 577         local->hw.max_rx_aggregation_subframes = IEEE80211_MAX_AMPDU_BUF;
 578         local->hw.max_tx_aggregation_subframes = IEEE80211_MAX_AMPDU_BUF;
 579         local->hw.offchannel_tx_hw_queue = IEEE80211_INVAL_HW_QUEUE;
 580         local->hw.conf.long_frame_max_tx_count = wiphy->retry_long;
 581         local->hw.conf.short_frame_max_tx_count = wiphy->retry_short;
 582         local->hw.radiotap_mcs_details = IEEE80211_RADIOTAP_MCS_HAVE_MCS |
 583                                          IEEE80211_RADIOTAP_MCS_HAVE_GI |
 584                                          IEEE80211_RADIOTAP_MCS_HAVE_BW;
 585         local->hw.radiotap_vht_details = IEEE80211_RADIOTAP_VHT_KNOWN_GI |
 586                                          IEEE80211_RADIOTAP_VHT_KNOWN_BANDWIDTH;
 587         local->hw.uapsd_queues = IEEE80211_DEFAULT_UAPSD_QUEUES;
 588         local->hw.uapsd_max_sp_len = IEEE80211_DEFAULT_MAX_SP_LEN;
 589         local->user_power_level = IEEE80211_UNSET_POWER_LEVEL;
 590         wiphy->ht_capa_mod_mask = &mac80211_ht_capa_mod_mask;
 591         wiphy->vht_capa_mod_mask = &mac80211_vht_capa_mod_mask;
 592
 593         local->ext_capa[7] = WLAN_EXT_CAPA8_OPMODE_NOTIF;
 594
 595         wiphy->extended_capabilities = local->ext_capa;
 596         wiphy->extended_capabilities_mask = local->ext_capa;
 597         wiphy->extended_capabilities_len =
 598                 ARRAY_SIZE(local->ext_capa);
 599
 600         INIT_LIST_HEAD(&local->interfaces);
 601
 602         __hw_addr_init(&local->mc_list);
 603
 604         mutex_init(&local->iflist_mtx);
 605         mutex_init(&local->mtx);
 606
 607         mutex_init(&local->key_mtx);
 608         spin_lock_init(&local->filter_lock);
 609         spin_lock_init(&local->rx_path_lock);
 610         spin_lock_init(&local->queue_stop_reason_lock);
 611
 612         INIT_LIST_HEAD(&local->chanctx_list);
 613         mutex_init(&local->chanctx_mtx);
 614
 615         INIT_DELAYED_WORK(&local->scan_work, ieee80211_scan_work);
 616
 617         INIT_WORK(&local->restart_work, ieee80211_restart_work);
 618
 619         INIT_WORK(&local->radar_detected_work,
 620                   ieee80211_dfs_radar_detected_work);
 621
 622         INIT_WORK(&local->reconfig_filter, ieee80211_reconfig_filter);
 623         local->smps_mode = IEEE80211_SMPS_OFF;
 624
 625         INIT_WORK(&local->dynamic_ps_enable_work,
 626                   ieee80211_dynamic_ps_enable_work);
 627         INIT_WORK(&local->dynamic_ps_disable_work,
 628                   ieee80211_dynamic_ps_disable_work);
 629         setup_timer(&local->dynamic_ps_timer,
 630                     ieee80211_dynamic_ps_timer, (unsigned long) local);
 631
 632         INIT_WORK(&local->sched_scan_stopped_work,
 633                   ieee80211_sched_scan_stopped_work);
 634
 635         spin_lock_init(&local->ack_status_lock);
 636         idr_init(&local->ack_status_frames);
 637
 638         for (i = 0; i < IEEE80211_MAX_QUEUES; i++) {
 639                 skb_queue_head_init(&local->pending[i]);
 640                 atomic_set(&local->agg_queue_stop[i], 0);
 641         }
 642         tasklet_init(&local->tx_pending_tasklet, ieee80211_tx_pending,
 643                      (unsigned long)local);
 644
 645         tasklet_init(&local->tasklet,
 646                      ieee80211_tasklet_handler,
 647                      (unsigned long) local);
 648
 649         skb_queue_head_init(&local->skb_queue);
 650         skb_queue_head_init(&local->skb_queue_unreliable);
 651
 652         ieee80211_led_names(local);
 653
 654         ieee80211_roc_setup(local);
 655
 656         return &local->hw;
 657  err_free:
 658         wiphy_free(wiphy);
 659         return NULL;
 660 }
 661 EXPORT_SYMBOL(ieee80211_alloc_hw_nm);
 662
 663 static int ieee80211_init_cipher_suites(struct ieee80211_local *local)
 664 {
 665         bool have_wep = !(IS_ERR(local->wep_tx_tfm) ||
 666                           IS_ERR(local->wep_rx_tfm));
 667         bool have_mfp = local->hw.flags & IEEE80211_HW_MFP_CAPABLE;
 668         int n_suites = 0, r = 0, w = 0;
 669         u32 *suites;
 670         static const u32 cipher_suites[] = {
 671                 /* keep WEP first, it may be removed below */
 672                 WLAN_CIPHER_SUITE_WEP40,
 673                 WLAN_CIPHER_SUITE_WEP104,
 674                 WLAN_CIPHER_SUITE_TKIP,
 675                 WLAN_CIPHER_SUITE_CCMP,
 676                 WLAN_CIPHER_SUITE_CCMP_256,
 677                 WLAN_CIPHER_SUITE_GCMP,
 678                 WLAN_CIPHER_SUITE_GCMP_256,
 679
 680                 /* keep last -- depends on hw flags! */
 681                 WLAN_CIPHER_SUITE_AES_CMAC,
 682                 WLAN_CIPHER_SUITE_BIP_CMAC_256,
 683                 WLAN_CIPHER_SUITE_BIP_GMAC_128,
 684                 WLAN_CIPHER_SUITE_BIP_GMAC_256,
 685         };
 686
 687         if (local->hw.flags & IEEE80211_HW_SW_CRYPTO_CONTROL ||
 688             local->hw.wiphy->cipher_suites) {
 689                 /* If the driver advertises, or doesn't support SW crypto,
 690                  * we only need to remove WEP if necessary.
 691                  */
 692                 if (have_wep)
 693                         return 0;
 694
 695                 /* well if it has _no_ ciphers ... fine */
 696                 if (!local->hw.wiphy->n_cipher_suites)
 697                         return 0;
 698
 699                 /* Driver provides cipher suites, but we need to exclude WEP */
 700                 suites = kmemdup(local->hw.wiphy->cipher_suites,
 701                                  sizeof(u32) * local->hw.wiphy->n_cipher_suites,
 702                                  GFP_KERNEL);
 703                 if (!suites)
 704                         return -ENOMEM;
 705
 706                 for (r = 0; r < local->hw.wiphy->n_cipher_suites; r++) {
 707                         u32 suite = local->hw.wiphy->cipher_suites[r];
 708
 709                         if (suite == WLAN_CIPHER_SUITE_WEP40 ||
 710                             suite == WLAN_CIPHER_SUITE_WEP104)
 711                                 continue;
 712                         suites[w++] = suite;
 713                 }
 714         } else if (!local->hw.cipher_schemes) {
 715                 /* If the driver doesn't have cipher schemes, there's nothing
 716                  * else to do other than assign the (software supported and
 717                  * perhaps offloaded) cipher suites.
 718                  */
 719                 local->hw.wiphy->cipher_suites = cipher_suites;
 720                 local->hw.wiphy->n_cipher_suites = ARRAY_SIZE(cipher_suites);
 721
 722                 if (!have_mfp)
 723                         local->hw.wiphy->n_cipher_suites -= 4;
 724
 725                 if (!have_wep) {
 726                         local->hw.wiphy->cipher_suites += 2;
 727                         local->hw.wiphy->n_cipher_suites -= 2;
 728                 }
 729
 730                 /* not dynamically allocated, so just return */
 731                 return 0;
 732         } else {
 733                 const struct ieee80211_cipher_scheme *cs;
 734
 735                 cs = local->hw.cipher_schemes;
 736
 737                 /* Driver specifies cipher schemes only (but not cipher suites
 738                  * including the schemes)
 739                  *
 740                  * We start counting ciphers defined by schemes, TKIP, CCMP,
 741                  * CCMP-256, GCMP, and GCMP-256
 742                  */
 743                 n_suites = local->hw.n_cipher_schemes + 5;
 744
 745                 /* check if we have WEP40 and WEP104 */
 746                 if (have_wep)
 747                         n_suites += 2;
 748
 749                 /* check if we have AES_CMAC, BIP-CMAC-256, BIP-GMAC-128,
 750                  * BIP-GMAC-256
 751                  */
 752                 if (have_mfp)
 753                         n_suites += 4;
 754
 755                 suites = kmalloc(sizeof(u32) * n_suites, GFP_KERNEL);
 756                 if (!suites)
 757                         return -ENOMEM;
 758
 759                 suites[w++] = WLAN_CIPHER_SUITE_CCMP;
 760                 suites[w++] = WLAN_CIPHER_SUITE_CCMP_256;
 761                 suites[w++] = WLAN_CIPHER_SUITE_TKIP;
 762                 suites[w++] = WLAN_CIPHER_SUITE_GCMP;
 763                 suites[w++] = WLAN_CIPHER_SUITE_GCMP_256;
 764
 765                 if (have_wep) {
 766                         suites[w++] = WLAN_CIPHER_SUITE_WEP40;
 767                         suites[w++] = WLAN_CIPHER_SUITE_WEP104;
 768                 }
 769
 770                 if (have_mfp) {
 771                         suites[w++] = WLAN_CIPHER_SUITE_AES_CMAC;
 772                         suites[w++] = WLAN_CIPHER_SUITE_BIP_CMAC_256;
 773                         suites[w++] = WLAN_CIPHER_SUITE_BIP_GMAC_128;
 774                         suites[w++] = WLAN_CIPHER_SUITE_BIP_GMAC_256;
 775                 }
 776
 777                 for (r = 0; r < local->hw.n_cipher_schemes; r++)
 778                         suites[w++] = cs[r].cipher;
 779         }
 780
 781         local->hw.wiphy->cipher_suites = suites;
 782         local->hw.wiphy->n_cipher_suites = w;
 783         local->wiphy_ciphers_allocated = true;
 784
 785         return 0;
 786 }
 787
 788 int ieee80211_register_hw(struct ieee80211_hw *hw)
 789 {
 790         struct ieee80211_local *local = hw_to_local(hw);
 791         int result, i;
 792         enum ieee80211_band band;
 793         int channels, max_bitrates;
 794         bool supp_ht, supp_vht;
 795         netdev_features_t feature_whitelist;
 796         struct cfg80211_chan_def dflt_chandef = {};
 797
 798         if (hw->flags & IEEE80211_HW_QUEUE_CONTROL &&
 799             (local->hw.offchannel_tx_hw_queue == IEEE80211_INVAL_HW_QUEUE ||
 800              local->hw.offchannel_tx_hw_queue >= local->hw.queues))
 801                 return -EINVAL;
 802
 803         if ((hw->wiphy->features & NL80211_FEATURE_TDLS_CHANNEL_SWITCH) &&
 804             (!local->ops->tdls_channel_switch ||
 805              !local->ops->tdls_cancel_channel_switch ||
 806              !local->ops->tdls_recv_channel_switch))
 807                 return -EOPNOTSUPP;
 808
 809 #ifdef CONFIG_PM
 810         if (hw->wiphy->wowlan && (!local->ops->suspend || !local->ops->resume))
 811                 return -EINVAL;
 812 #endif
 813
 814         if (!local->use_chanctx) {
 815                 for (i = 0; i < local->hw.wiphy->n_iface_combinations; i++) {
 816                         const struct ieee80211_iface_combination *comb;
 817
 818                         comb = &local->hw.wiphy->iface_combinations[i];
 819
 820                         if (comb->num_different_channels > 1)
 821                                 return -EINVAL;
 822                 }
 823         } else {
 824                 /*
 825                  * WDS is currently prohibited when channel contexts are used
 826                  * because there's no clear definition of which channel WDS
 827                  * type interfaces use
 828                  */
 829                 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_WDS))
 830                         return -EINVAL;
 831
 832                 /* DFS is not supported with multi-channel combinations yet */
 833                 for (i = 0; i < local->hw.wiphy->n_iface_combinations; i++) {
 834                         const struct ieee80211_iface_combination *comb;
 835
 836                         comb = &local->hw.wiphy->iface_combinations[i];
 837
 838                         if (comb->radar_detect_widths &&
 839                             comb->num_different_channels > 1)
 840                                 return -EINVAL;
 841                 }
 842         }
 843
 844         /* Only HW csum features are currently compatible with mac80211 */
 845         feature_whitelist = NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM |
 846                             NETIF_F_HW_CSUM;
 847         if (WARN_ON(hw->netdev_features & ~feature_whitelist))
 848                 return -EINVAL;
 849
 850         if (hw->max_report_rates == 0)
 851                 hw->max_report_rates = hw->max_rates;
 852
 853         local->rx_chains = 1;
 854
 855         /*
 856          * generic code guarantees at least one band,
 857          * set this very early because much code assumes
 858          * that hw.conf.channel is assigned
 859          */
 860         channels = 0;
 861         max_bitrates = 0;
 862         supp_ht = false;
 863         supp_vht = false;
 864         for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
 865                 struct ieee80211_supported_band *sband;
 866
 867                 sband = local->hw.wiphy->bands[band];
 868                 if (!sband)
 869                         continue;
 870
 871                 if (!dflt_chandef.chan) {
 872                         cfg80211_chandef_create(&dflt_chandef,
 873                                                 &sband->channels[0],
 874                                                 NL80211_CHAN_NO_HT);
 875                         /* init channel we're on */
 876                         if (!local->use_chanctx && !local->_oper_chandef.chan) {
 877                                 local->hw.conf.chandef = dflt_chandef;
 878                                 local->_oper_chandef = dflt_chandef;
 879                         }
 880                         local->monitor_chandef = dflt_chandef;
 881                 }
 882
 883                 channels += sband->n_channels;
 884
 885                 if (max_bitrates < sband->n_bitrates)
 886                         max_bitrates = sband->n_bitrates;
 887                 supp_ht = supp_ht || sband->ht_cap.ht_supported;
 888                 supp_vht = supp_vht || sband->vht_cap.vht_supported;
 889
 890                 if (sband->ht_cap.ht_supported)
 891                         local->rx_chains =
 892                                 max(ieee80211_mcs_to_chains(&sband->ht_cap.mcs),
 893                                     local->rx_chains);
 894
 895                 /* TODO: consider VHT for RX chains, hopefully it's the same */
 896         }
 897
 898         /* if low-level driver supports AP, we also support VLAN */
 899         if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_AP)) {
 900                 hw->wiphy->interface_modes |= BIT(NL80211_IFTYPE_AP_VLAN);
 901                 hw->wiphy->software_iftypes |= BIT(NL80211_IFTYPE_AP_VLAN);
 902         }
 903
 904         /* mac80211 always supports monitor */
 905         hw->wiphy->interface_modes |= BIT(NL80211_IFTYPE_MONITOR);
 906         hw->wiphy->software_iftypes |= BIT(NL80211_IFTYPE_MONITOR);
 907
 908         /* mac80211 doesn't support more than one IBSS interface right now */
 909         for (i = 0; i < hw->wiphy->n_iface_combinations; i++) {
 910                 const struct ieee80211_iface_combination *c;
 911                 int j;
 912
 913                 c = &hw->wiphy->iface_combinations[i];
 914
 915                 for (j = 0; j < c->n_limits; j++)
 916                         if ((c->limits[j].types & BIT(NL80211_IFTYPE_ADHOC)) &&
 917                             c->limits[j].max > 1)
 918                                 return -EINVAL;
 919         }
 920
 921         local->int_scan_req = kzalloc(sizeof(*local->int_scan_req) +
 922                                       sizeof(void *) * channels, GFP_KERNEL);
 923         if (!local->int_scan_req)
 924                 return -ENOMEM;
 925
 926         for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
 927                 if (!local->hw.wiphy->bands[band])
 928                         continue;
 929                 local->int_scan_req->rates[band] = (u32) -1;
 930         }
 931
 932 #ifndef CONFIG_MAC80211_MESH
 933         /* mesh depends on Kconfig, but drivers should set it if they want */
 934         local->hw.wiphy->interface_modes &= ~BIT(NL80211_IFTYPE_MESH_POINT);
 935 #endif
 936
 937         /* if the underlying driver supports mesh, mac80211 will (at least)
 938          * provide routing of mesh authentication frames to userspace */
 939         if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_MESH_POINT))
 940                 local->hw.wiphy->flags |= WIPHY_FLAG_MESH_AUTH;
 941
 942         /* mac80211 supports control port protocol changing */
 943         local->hw.wiphy->flags |= WIPHY_FLAG_CONTROL_PORT_PROTOCOL;
 944
 945         if (local->hw.flags & IEEE80211_HW_SIGNAL_DBM) {
 946                 local->hw.wiphy->signal_type = CFG80211_SIGNAL_TYPE_MBM;
 947         } else if (local->hw.flags & IEEE80211_HW_SIGNAL_UNSPEC) {
 948                 local->hw.wiphy->signal_type = CFG80211_SIGNAL_TYPE_UNSPEC;
 949                 if (hw->max_signal <= 0) {
 950                         result = -EINVAL;
 951                         goto fail_wiphy_register;
 952                 }
 953         }
 954
 955         /*
 956          * Calculate scan IE length -- we need this to alloc
 957          * memory and to subtract from the driver limit. It
 958          * includes the DS Params, (extended) supported rates, and HT
 959          * information -- SSID is the driver's responsibility.
 960          */
 961         local->scan_ies_len = 4 + max_bitrates /* (ext) supp rates */ +
 962                 3 /* DS Params */;
 963         if (supp_ht)
 964                 local->scan_ies_len += 2 + sizeof(struct ieee80211_ht_cap);
 965
 966         if (supp_vht)
 967                 local->scan_ies_len +=
 968                         2 + sizeof(struct ieee80211_vht_cap);
 969
 970         if (!local->ops->hw_scan) {
 971                 /* For hw_scan, driver needs to set these up. */
 972                 local->hw.wiphy->max_scan_ssids = 4;
 973                 local->hw.wiphy->max_scan_ie_len = IEEE80211_MAX_DATA_LEN;
 974         }
 975
 976         /*
 977          * If the driver supports any scan IEs, then assume the
 978          * limit includes the IEs mac80211 will add, otherwise
 979          * leave it at zero and let the driver sort it out; we
 980          * still pass our IEs to the driver but userspace will
 981          * not be allowed to in that case.
 982          */
 983         if (local->hw.wiphy->max_scan_ie_len)
 984                 local->hw.wiphy->max_scan_ie_len -= local->scan_ies_len;
 985
 986         WARN_ON(!ieee80211_cs_list_valid(local->hw.cipher_schemes,
 987                                          local->hw.n_cipher_schemes));
 988
 989         result = ieee80211_init_cipher_suites(local);
 990         if (result < 0)
 991                 goto fail_wiphy_register;
 992
 993         if (!local->ops->remain_on_channel)
 994                 local->hw.wiphy->max_remain_on_channel_duration = 5000;
 995
 996         /* mac80211 based drivers don't support internal TDLS setup */
 997         if (local->hw.wiphy->flags & WIPHY_FLAG_SUPPORTS_TDLS)
 998                 local->hw.wiphy->flags |= WIPHY_FLAG_TDLS_EXTERNAL_SETUP;
 999
1000         /* mac80211 supports eCSA, if the driver supports STA CSA at all */
1001         if (local->hw.flags & IEEE80211_HW_CHANCTX_STA_CSA)
1002                 local->ext_capa[0] |= WLAN_EXT_CAPA1_EXT_CHANNEL_SWITCHING;
1003
1004         local->hw.wiphy->max_num_csa_counters = IEEE80211_MAX_CSA_COUNTERS_NUM;
1005
1006         result = wiphy_register(local->hw.wiphy);
1007         if (result < 0)
1008                 goto fail_wiphy_register;
1009
1010         /*
1011          * We use the number of queues for feature tests (QoS, HT) internally
1012          * so restrict them appropriately.
1013          */
1014         if (hw->queues > IEEE80211_MAX_QUEUES)
1015                 hw->queues = IEEE80211_MAX_QUEUES;
1016
1017         local->workqueue =
1018                 alloc_ordered_workqueue("%s", 0, wiphy_name(local->hw.wiphy));
1019         if (!local->workqueue) {
1020                 result = -ENOMEM;
1021                 goto fail_workqueue;
1022         }
1023
1024         /*
1025          * The hardware needs headroom for sending the frame,
1026          * and we need some headroom for passing the frame to monitor
1027          * interfaces, but never both at the same time.
1028          */
1029         local->tx_headroom = max_t(unsigned int , local->hw.extra_tx_headroom,
1030                                    IEEE80211_TX_STATUS_HEADROOM);
1031
1032         debugfs_hw_add(local);
1033
1034         /*
1035          * if the driver doesn't specify a max listen interval we
1036          * use 5 which should be a safe default
1037          */
1038         if (local->hw.max_listen_interval == 0)
1039                 local->hw.max_listen_interval = 5;
1040
1041         local->hw.conf.listen_interval = local->hw.max_listen_interval;
1042
1043         local->dynamic_ps_forced_timeout = -1;
1044
1045         if (!local->hw.txq_ac_max_pending)
1046                 local->hw.txq_ac_max_pending = 64;
1047
1048         result = ieee80211_wep_init(local);
1049         if (result < 0)
1050                 wiphy_debug(local->hw.wiphy, "Failed to initialize wep: %d\n",
1051                             result);
1052
1053         local->hw.conf.flags = IEEE80211_CONF_IDLE;
1054
1055         ieee80211_led_init(local);
1056
1057         rtnl_lock();
1058
1059         result = ieee80211_init_rate_ctrl_alg(local,
1060                                               hw->rate_control_algorithm);
1061         if (result < 0) {
1062                 wiphy_debug(local->hw.wiphy,
1063                             "Failed to initialize rate control algorithm\n");
1064                 goto fail_rate;
1065         }
1066
1067         /* add one default STA interface if supported */
1068         if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_STATION) &&
1069             !(hw->flags & IEEE80211_HW_NO_AUTO_VIF)) {
1070                 result = ieee80211_if_add(local, "wlan%d", NET_NAME_ENUM, NULL,
1071                                           NL80211_IFTYPE_STATION, NULL);
1072                 if (result)
1073                         wiphy_warn(local->hw.wiphy,
1074                                    "Failed to add default virtual iface\n");
1075         }
1076
1077         rtnl_unlock();
1078
1079         local->network_latency_notifier.notifier_call =
1080                 ieee80211_max_network_latency;
1081         result = pm_qos_add_notifier(PM_QOS_NETWORK_LATENCY,
1082                                      &local->network_latency_notifier);
1083         if (result)
1084                 goto fail_pm_qos;
1085
1086 #ifdef CONFIG_INET
1087         local->ifa_notifier.notifier_call = ieee80211_ifa_changed;
1088         result = register_inetaddr_notifier(&local->ifa_notifier);
1089         if (result)
1090                 goto fail_ifa;
1091 #endif
1092
1093 #if IS_ENABLED(CONFIG_IPV6)
1094         local->ifa6_notifier.notifier_call = ieee80211_ifa6_changed;
1095         result = register_inet6addr_notifier(&local->ifa6_notifier);
1096         if (result)
1097                 goto fail_ifa6;
1098 #endif
1099
1100         return 0;
1101
1102 #if IS_ENABLED(CONFIG_IPV6)
1103  fail_ifa6:
1104 #ifdef CONFIG_INET
1105         unregister_inetaddr_notifier(&local->ifa_notifier);
1106 #endif
1107 #endif
1108 #if defined(CONFIG_INET) || defined(CONFIG_IPV6)
1109  fail_ifa:
1110         pm_qos_remove_notifier(PM_QOS_NETWORK_LATENCY,
1111                                &local->network_latency_notifier);
1112 #endif
1113  fail_pm_qos:
1114         rtnl_lock();
1115         rate_control_deinitialize(local);
1116         ieee80211_remove_interfaces(local);
1117  fail_rate:
1118         rtnl_unlock();
1119         ieee80211_led_exit(local);
1120         ieee80211_wep_free(local);
1121         destroy_workqueue(local->workqueue);
1122  fail_workqueue:
1123         wiphy_unregister(local->hw.wiphy);
1124  fail_wiphy_register:
1125         if (local->wiphy_ciphers_allocated)
1126                 kfree(local->hw.wiphy->cipher_suites);
1127         kfree(local->int_scan_req);
1128         return result;
1129 }
1130 EXPORT_SYMBOL(ieee80211_register_hw);
1131
1132 void ieee80211_napi_add(struct ieee80211_hw *hw, struct napi_struct *napi,
1133                         struct net_device *napi_dev,
1134                         int (*poll)(struct napi_struct *, int),
1135                         int weight)
1136 {
1137         struct ieee80211_local *local = hw_to_local(hw);
1138
1139         netif_napi_add(napi_dev, napi, poll, weight);
1140         local->napi = napi;
1141 }
1142 EXPORT_SYMBOL_GPL(ieee80211_napi_add);
1143
1144 void ieee80211_unregister_hw(struct ieee80211_hw *hw)
1145 {
1146         struct ieee80211_local *local = hw_to_local(hw);
1147
1148         tasklet_kill(&local->tx_pending_tasklet);
1149         tasklet_kill(&local->tasklet);
1150
1151         pm_qos_remove_notifier(PM_QOS_NETWORK_LATENCY,
1152                                &local->network_latency_notifier);
1153 #ifdef CONFIG_INET
1154         unregister_inetaddr_notifier(&local->ifa_notifier);
1155 #endif
1156 #if IS_ENABLED(CONFIG_IPV6)
1157         unregister_inet6addr_notifier(&local->ifa6_notifier);
1158 #endif
1159
1160         rtnl_lock();
1161
1162         /*
1163          * At this point, interface list manipulations are fine
1164          * because the driver cannot be handing us frames any
1165          * more and the tasklet is killed.
1166          */
1167         ieee80211_remove_interfaces(local);
1168
1169         rtnl_unlock();
1170
1171         cancel_work_sync(&local->restart_work);
1172         cancel_work_sync(&local->reconfig_filter);
1173         flush_work(&local->sched_scan_stopped_work);
1174
1175         ieee80211_clear_tx_pending(local);
1176         rate_control_deinitialize(local);
1177
1178         if (skb_queue_len(&local->skb_queue) ||
1179             skb_queue_len(&local->skb_queue_unreliable))
1180                 wiphy_warn(local->hw.wiphy, "skb_queue not empty\n");
1181         skb_queue_purge(&local->skb_queue);
1182         skb_queue_purge(&local->skb_queue_unreliable);
1183
1184         destroy_workqueue(local->workqueue);
1185         wiphy_unregister(local->hw.wiphy);
1186         ieee80211_wep_free(local);
1187         ieee80211_led_exit(local);
1188         kfree(local->int_scan_req);
1189 }
1190 EXPORT_SYMBOL(ieee80211_unregister_hw);
1191
1192 static int ieee80211_free_ack_frame(int id, void *p, void *data)
1193 {
1194         WARN_ONCE(1, "Have pending ack frames!\n");
1195         kfree_skb(p);
1196         return 0;
1197 }
1198
1199 void ieee80211_free_hw(struct ieee80211_hw *hw)
1200 {
1201         struct ieee80211_local *local = hw_to_local(hw);
1202
1203         mutex_destroy(&local->iflist_mtx);
1204         mutex_destroy(&local->mtx);
1205
1206         if (local->wiphy_ciphers_allocated)
1207                 kfree(local->hw.wiphy->cipher_suites);
1208
1209         idr_for_each(&local->ack_status_frames,
1210                      ieee80211_free_ack_frame, NULL);
1211         idr_destroy(&local->ack_status_frames);
1212
1213         sta_info_stop(local);
1214
1215         wiphy_free(local->hw.wiphy);
1216 }
1217 EXPORT_SYMBOL(ieee80211_free_hw);
1218
1219 static int __init ieee80211_init(void)
1220 {
1221         struct sk_buff *skb;
1222         int ret;
1223
1224         BUILD_BUG_ON(sizeof(struct ieee80211_tx_info) > sizeof(skb->cb));
1225         BUILD_BUG_ON(offsetof(struct ieee80211_tx_info, driver_data) +
1226                      IEEE80211_TX_INFO_DRIVER_DATA_SIZE > sizeof(skb->cb));
1227
1228         ret = rc80211_minstrel_init();
1229         if (ret)
1230                 return ret;
1231
1232         ret = rc80211_minstrel_ht_init();
1233         if (ret)
1234                 goto err_minstrel;
1235
1236         ret = ieee80211_iface_init();
1237         if (ret)
1238                 goto err_netdev;
1239
1240         return 0;
1241  err_netdev:
1242         rc80211_minstrel_ht_exit();
1243  err_minstrel:
1244         rc80211_minstrel_exit();
1245
1246         return ret;
1247 }
1248
1249 static void __exit ieee80211_exit(void)
1250 {
1251         rc80211_minstrel_ht_exit();
1252         rc80211_minstrel_exit();
1253
1254         ieee80211s_stop();
1255
1256         ieee80211_iface_exit();
1257
1258         rcu_barrier();
1259 }
1260
1261
1262 subsys_initcall(ieee80211_init);
1263 module_exit(ieee80211_exit);
1264
1265 MODULE_DESCRIPTION("IEEE 802.11 subsystem");
1266 MODULE_LICENSE("GPL");