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 36void 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 83static 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 91static 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 161int 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 195void 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 206u32 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 216static 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 243static 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); 251 252 WARN(test_bit(SCAN_HW_SCANNING, &local->scanning), 253 "%s called with hardware scan in progress\n", __func__); 254 255 rtnl_lock(); 256 list_for_each_entry(sdata, &local->interfaces, list) 257 flush_delayed_work(&sdata->dec_tailroom_needed_wk); 258 ieee80211_scan_cancel(local); 259 ieee80211_reconfig(local); 260 rtnl_unlock(); 261} 262 263void ieee80211_restart_hw(struct ieee80211_hw *hw) 264{ 265 struct ieee80211_local *local = hw_to_local(hw); 266 267 trace_api_restart_hw(local); 268 269 wiphy_info(hw->wiphy, 270 "Hardware restart was requested\n"); 271 272 /* use this reason, ieee80211_reconfig will unblock it */ 273 ieee80211_stop_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP, 274 IEEE80211_QUEUE_STOP_REASON_SUSPEND, 275 false); 276 277 /* 278 * Stop all Rx during the reconfig. We don't want state changes 279 * or driver callbacks while this is in progress. 280 */ 281 local->in_reconfig = true; 282 barrier(); 283 284 queue_work(system_freezable_wq, &local->restart_work); 285} 286EXPORT_SYMBOL(ieee80211_restart_hw); 287 288#ifdef CONFIG_INET 289static int ieee80211_ifa_changed(struct notifier_block *nb, 290 unsigned long data, void *arg) 291{ 292 struct in_ifaddr *ifa = arg; 293 struct ieee80211_local *local = 294 container_of(nb, struct ieee80211_local, 295 ifa_notifier); 296 struct net_device *ndev = ifa->ifa_dev->dev; 297 struct wireless_dev *wdev = ndev->ieee80211_ptr; 298 struct in_device *idev; 299 struct ieee80211_sub_if_data *sdata; 300 struct ieee80211_bss_conf *bss_conf; 301 struct ieee80211_if_managed *ifmgd; 302 int c = 0; 303 304 /* Make sure it's our interface that got changed */ 305 if (!wdev) 306 return NOTIFY_DONE; 307 308 if (wdev->wiphy != local->hw.wiphy) 309 return NOTIFY_DONE; 310 311 sdata = IEEE80211_DEV_TO_SUB_IF(ndev); 312 bss_conf = &sdata->vif.bss_conf; 313 314 /* ARP filtering is only supported in managed mode */ 315 if (sdata->vif.type != NL80211_IFTYPE_STATION) 316 return NOTIFY_DONE; 317 318 idev = __in_dev_get_rtnl(sdata->dev); 319 if (!idev) 320 return NOTIFY_DONE; 321 322 ifmgd = &sdata->u.mgd; 323 sdata_lock(sdata); 324 325 /* Copy the addresses to the bss_conf list */ 326 ifa = idev->ifa_list; 327 while (ifa) { 328 if (c < IEEE80211_BSS_ARP_ADDR_LIST_LEN) 329 bss_conf->arp_addr_list[c] = ifa->ifa_address; 330 ifa = ifa->ifa_next; 331 c++; 332 } 333 334 bss_conf->arp_addr_cnt = c; 335 336 /* Configure driver only if associated (which also implies it is up) */ 337 if (ifmgd->associated) 338 ieee80211_bss_info_change_notify(sdata, 339 BSS_CHANGED_ARP_FILTER); 340 341 sdata_unlock(sdata); 342 343 return NOTIFY_OK; 344} 345#endif 346 347#if IS_ENABLED(CONFIG_IPV6) 348static int ieee80211_ifa6_changed(struct notifier_block *nb, 349 unsigned long data, void *arg) 350{ 351 struct inet6_ifaddr *ifa = (struct inet6_ifaddr *)arg; 352 struct inet6_dev *idev = ifa->idev; 353 struct net_device *ndev = ifa->idev->dev; 354 struct ieee80211_local *local = 355 container_of(nb, struct ieee80211_local, ifa6_notifier); 356 struct wireless_dev *wdev = ndev->ieee80211_ptr; 357 struct ieee80211_sub_if_data *sdata; 358 359 /* Make sure it's our interface that got changed */ 360 if (!wdev || wdev->wiphy != local->hw.wiphy) 361 return NOTIFY_DONE; 362 363 sdata = IEEE80211_DEV_TO_SUB_IF(ndev); 364 365 /* 366 * For now only support station mode. This is mostly because 367 * doing AP would have to handle AP_VLAN in some way ... 368 */ 369 if (sdata->vif.type != NL80211_IFTYPE_STATION) 370 return NOTIFY_DONE; 371 372 drv_ipv6_addr_change(local, sdata, idev); 373 374 return NOTIFY_OK; 375} 376#endif 377 378/* There isn't a lot of sense in it, but you can transmit anything you like */ 379static const struct ieee80211_txrx_stypes 380ieee80211_default_mgmt_stypes[NUM_NL80211_IFTYPES] = { 381 [NL80211_IFTYPE_ADHOC] = { 382 .tx = 0xffff, 383 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) | 384 BIT(IEEE80211_STYPE_AUTH >> 4) | 385 BIT(IEEE80211_STYPE_DEAUTH >> 4) | 386 BIT(IEEE80211_STYPE_PROBE_REQ >> 4), 387 }, 388 [NL80211_IFTYPE_STATION] = { 389 .tx = 0xffff, 390 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) | 391 BIT(IEEE80211_STYPE_PROBE_REQ >> 4), 392 }, 393 [NL80211_IFTYPE_AP] = { 394 .tx = 0xffff, 395 .rx = BIT(IEEE80211_STYPE_ASSOC_REQ >> 4) | 396 BIT(IEEE80211_STYPE_REASSOC_REQ >> 4) | 397 BIT(IEEE80211_STYPE_PROBE_REQ >> 4) | 398 BIT(IEEE80211_STYPE_DISASSOC >> 4) | 399 BIT(IEEE80211_STYPE_AUTH >> 4) | 400 BIT(IEEE80211_STYPE_DEAUTH >> 4) | 401 BIT(IEEE80211_STYPE_ACTION >> 4), 402 }, 403 [NL80211_IFTYPE_AP_VLAN] = { 404 /* copy AP */ 405 .tx = 0xffff, 406 .rx = BIT(IEEE80211_STYPE_ASSOC_REQ >> 4) | 407 BIT(IEEE80211_STYPE_REASSOC_REQ >> 4) | 408 BIT(IEEE80211_STYPE_PROBE_REQ >> 4) | 409 BIT(IEEE80211_STYPE_DISASSOC >> 4) | 410 BIT(IEEE80211_STYPE_AUTH >> 4) | 411 BIT(IEEE80211_STYPE_DEAUTH >> 4) | 412 BIT(IEEE80211_STYPE_ACTION >> 4), 413 }, 414 [NL80211_IFTYPE_P2P_CLIENT] = { 415 .tx = 0xffff, 416 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) | 417 BIT(IEEE80211_STYPE_PROBE_REQ >> 4), 418 }, 419 [NL80211_IFTYPE_P2P_GO] = { 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_MESH_POINT] = { 430 .tx = 0xffff, 431 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) | 432 BIT(IEEE80211_STYPE_AUTH >> 4) | 433 BIT(IEEE80211_STYPE_DEAUTH >> 4), 434 }, 435 [NL80211_IFTYPE_P2P_DEVICE] = { 436 .tx = 0xffff, 437 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) | 438 BIT(IEEE80211_STYPE_PROBE_REQ >> 4), 439 }, 440}; 441 442static const struct ieee80211_ht_cap mac80211_ht_capa_mod_mask = { 443 .ampdu_params_info = IEEE80211_HT_AMPDU_PARM_FACTOR | 444 IEEE80211_HT_AMPDU_PARM_DENSITY, 445 446 .cap_info = cpu_to_le16(IEEE80211_HT_CAP_SUP_WIDTH_20_40 | 447 IEEE80211_HT_CAP_MAX_AMSDU | 448 IEEE80211_HT_CAP_SGI_20 | 449 IEEE80211_HT_CAP_SGI_40 | 450 IEEE80211_HT_CAP_LDPC_CODING | 451 IEEE80211_HT_CAP_40MHZ_INTOLERANT), 452 .mcs = { 453 .rx_mask = { 0xff, 0xff, 0xff, 0xff, 0xff, 454 0xff, 0xff, 0xff, 0xff, 0xff, }, 455 }, 456}; 457 458static const struct ieee80211_vht_cap mac80211_vht_capa_mod_mask = { 459 .vht_cap_info = 460 cpu_to_le32(IEEE80211_VHT_CAP_RXLDPC | 461 IEEE80211_VHT_CAP_SHORT_GI_80 | 462 IEEE80211_VHT_CAP_SHORT_GI_160 | 463 IEEE80211_VHT_CAP_RXSTBC_1 | 464 IEEE80211_VHT_CAP_RXSTBC_2 | 465 IEEE80211_VHT_CAP_RXSTBC_3 | 466 IEEE80211_VHT_CAP_RXSTBC_4 | 467 IEEE80211_VHT_CAP_TXSTBC | 468 IEEE80211_VHT_CAP_SU_BEAMFORMER_CAPABLE | 469 IEEE80211_VHT_CAP_SU_BEAMFORMEE_CAPABLE | 470 IEEE80211_VHT_CAP_TX_ANTENNA_PATTERN | 471 IEEE80211_VHT_CAP_RX_ANTENNA_PATTERN | 472 IEEE80211_VHT_CAP_MAX_A_MPDU_LENGTH_EXPONENT_MASK), 473 .supp_mcs = { 474 .rx_mcs_map = cpu_to_le16(~0), 475 .tx_mcs_map = cpu_to_le16(~0), 476 }, 477}; 478 479struct ieee80211_hw *ieee80211_alloc_hw_nm(size_t priv_data_len, 480 const struct ieee80211_ops *ops, 481 const char *requested_name) 482{ 483 struct ieee80211_local *local; 484 int priv_size, i; 485 struct wiphy *wiphy; 486 bool use_chanctx; 487 488 if (WARN_ON(!ops->tx || !ops->start || !ops->stop || !ops->config || 489 !ops->add_interface || !ops->remove_interface || 490 !ops->configure_filter)) 491 return NULL; 492 493 if (WARN_ON(ops->sta_state && (ops->sta_add || ops->sta_remove))) 494 return NULL; 495 496 /* check all or no channel context operations exist */ 497 i = !!ops->add_chanctx + !!ops->remove_chanctx + 498 !!ops->change_chanctx + !!ops->assign_vif_chanctx + 499 !!ops->unassign_vif_chanctx; 500 if (WARN_ON(i != 0 && i != 5)) 501 return NULL; 502 use_chanctx = i == 5; 503 504 /* Ensure 32-byte alignment of our private data and hw private data. 505 * We use the wiphy priv data for both our ieee80211_local and for 506 * the driver's private data 507 * 508 * In memory it'll be like this: 509 * 510 * +-------------------------+ 511 * | struct wiphy | 512 * +-------------------------+ 513 * | struct ieee80211_local | 514 * +-------------------------+ 515 * | driver's private data | 516 * +-------------------------+ 517 * 518 */ 519 priv_size = ALIGN(sizeof(*local), NETDEV_ALIGN) + priv_data_len; 520 521 wiphy = wiphy_new_nm(&mac80211_config_ops, priv_size, requested_name); 522 523 if (!wiphy) 524 return NULL; 525 526 wiphy->mgmt_stypes = ieee80211_default_mgmt_stypes; 527 528 wiphy->privid = mac80211_wiphy_privid; 529 530 wiphy->flags |= WIPHY_FLAG_NETNS_OK | 531 WIPHY_FLAG_4ADDR_AP | 532 WIPHY_FLAG_4ADDR_STATION | 533 WIPHY_FLAG_REPORTS_OBSS | 534 WIPHY_FLAG_OFFCHAN_TX; 535 536 if (ops->remain_on_channel) 537 wiphy->flags |= WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL; 538 539 wiphy->features |= NL80211_FEATURE_SK_TX_STATUS | 540 NL80211_FEATURE_SAE | 541 NL80211_FEATURE_HT_IBSS | 542 NL80211_FEATURE_VIF_TXPOWER | 543 NL80211_FEATURE_MAC_ON_CREATE | 544 NL80211_FEATURE_USERSPACE_MPM; 545 546 if (!ops->hw_scan) 547 wiphy->features |= NL80211_FEATURE_LOW_PRIORITY_SCAN | 548 NL80211_FEATURE_AP_SCAN; 549 550 551 if (!ops->set_key) 552 wiphy->flags |= WIPHY_FLAG_IBSS_RSN; 553 554 wiphy->bss_priv_size = sizeof(struct ieee80211_bss); 555 556 local = wiphy_priv(wiphy); 557 558 if (sta_info_init(local)) 559 goto err_free; 560 561 local->hw.wiphy = wiphy; 562 563 local->hw.priv = (char *)local + ALIGN(sizeof(*local), NETDEV_ALIGN); 564 565 local->ops = ops; 566 local->use_chanctx = use_chanctx; 567 568 /* set up some defaults */ 569 local->hw.queues = 1; 570 local->hw.max_rates = 1; 571 local->hw.max_report_rates = 0; 572 local->hw.max_rx_aggregation_subframes = IEEE80211_MAX_AMPDU_BUF; 573 local->hw.max_tx_aggregation_subframes = IEEE80211_MAX_AMPDU_BUF; 574 local->hw.offchannel_tx_hw_queue = IEEE80211_INVAL_HW_QUEUE; 575 local->hw.conf.long_frame_max_tx_count = wiphy->retry_long; 576 local->hw.conf.short_frame_max_tx_count = wiphy->retry_short; 577 local->hw.radiotap_mcs_details = IEEE80211_RADIOTAP_MCS_HAVE_MCS | 578 IEEE80211_RADIOTAP_MCS_HAVE_GI | 579 IEEE80211_RADIOTAP_MCS_HAVE_BW; 580 local->hw.radiotap_vht_details = IEEE80211_RADIOTAP_VHT_KNOWN_GI | 581 IEEE80211_RADIOTAP_VHT_KNOWN_BANDWIDTH; 582 local->hw.uapsd_queues = IEEE80211_DEFAULT_UAPSD_QUEUES; 583 local->hw.uapsd_max_sp_len = IEEE80211_DEFAULT_MAX_SP_LEN; 584 local->user_power_level = IEEE80211_UNSET_POWER_LEVEL; 585 wiphy->ht_capa_mod_mask = &mac80211_ht_capa_mod_mask; 586 wiphy->vht_capa_mod_mask = &mac80211_vht_capa_mod_mask; 587 588 local->ext_capa[7] = WLAN_EXT_CAPA8_OPMODE_NOTIF; 589 590 wiphy->extended_capabilities = local->ext_capa; 591 wiphy->extended_capabilities_mask = local->ext_capa; 592 wiphy->extended_capabilities_len = 593 ARRAY_SIZE(local->ext_capa); 594 595 INIT_LIST_HEAD(&local->interfaces); 596 597 __hw_addr_init(&local->mc_list); 598 599 mutex_init(&local->iflist_mtx); 600 mutex_init(&local->mtx); 601 602 mutex_init(&local->key_mtx); 603 spin_lock_init(&local->filter_lock); 604 spin_lock_init(&local->rx_path_lock); 605 spin_lock_init(&local->queue_stop_reason_lock); 606 607 INIT_LIST_HEAD(&local->chanctx_list); 608 mutex_init(&local->chanctx_mtx); 609 610 INIT_DELAYED_WORK(&local->scan_work, ieee80211_scan_work); 611 612 INIT_WORK(&local->restart_work, ieee80211_restart_work); 613 614 INIT_WORK(&local->radar_detected_work, 615 ieee80211_dfs_radar_detected_work); 616 617 INIT_WORK(&local->reconfig_filter, ieee80211_reconfig_filter); 618 local->smps_mode = IEEE80211_SMPS_OFF; 619 620 INIT_WORK(&local->dynamic_ps_enable_work, 621 ieee80211_dynamic_ps_enable_work); 622 INIT_WORK(&local->dynamic_ps_disable_work, 623 ieee80211_dynamic_ps_disable_work); 624 setup_timer(&local->dynamic_ps_timer, 625 ieee80211_dynamic_ps_timer, (unsigned long) local); 626 627 INIT_WORK(&local->sched_scan_stopped_work, 628 ieee80211_sched_scan_stopped_work); 629 630 INIT_WORK(&local->tdls_chsw_work, ieee80211_tdls_chsw_work); 631 632 spin_lock_init(&local->ack_status_lock); 633 idr_init(&local->ack_status_frames); 634 635 for (i = 0; i < IEEE80211_MAX_QUEUES; i++) { 636 skb_queue_head_init(&local->pending[i]); 637 atomic_set(&local->agg_queue_stop[i], 0); 638 } 639 tasklet_init(&local->tx_pending_tasklet, ieee80211_tx_pending, 640 (unsigned long)local); 641 642 tasklet_init(&local->tasklet, 643 ieee80211_tasklet_handler, 644 (unsigned long) local); 645 646 skb_queue_head_init(&local->skb_queue); 647 skb_queue_head_init(&local->skb_queue_unreliable); 648 skb_queue_head_init(&local->skb_queue_tdls_chsw); 649 650 ieee80211_alloc_led_names(local); 651 652 ieee80211_roc_setup(local); 653 654 return &local->hw; 655 err_free: 656 wiphy_free(wiphy); 657 return NULL; 658} 659EXPORT_SYMBOL(ieee80211_alloc_hw_nm); 660 661static int ieee80211_init_cipher_suites(struct ieee80211_local *local) 662{ 663 bool have_wep = !(IS_ERR(local->wep_tx_tfm) || 664 IS_ERR(local->wep_rx_tfm)); 665 bool have_mfp = ieee80211_hw_check(&local->hw, MFP_CAPABLE); 666 int n_suites = 0, r = 0, w = 0; 667 u32 *suites; 668 static const u32 cipher_suites[] = { 669 /* keep WEP first, it may be removed below */ 670 WLAN_CIPHER_SUITE_WEP40, 671 WLAN_CIPHER_SUITE_WEP104, 672 WLAN_CIPHER_SUITE_TKIP, 673 WLAN_CIPHER_SUITE_CCMP, 674 WLAN_CIPHER_SUITE_CCMP_256, 675 WLAN_CIPHER_SUITE_GCMP, 676 WLAN_CIPHER_SUITE_GCMP_256, 677 678 /* keep last -- depends on hw flags! */ 679 WLAN_CIPHER_SUITE_AES_CMAC, 680 WLAN_CIPHER_SUITE_BIP_CMAC_256, 681 WLAN_CIPHER_SUITE_BIP_GMAC_128, 682 WLAN_CIPHER_SUITE_BIP_GMAC_256, 683 }; 684 685 if (ieee80211_hw_check(&local->hw, SW_CRYPTO_CONTROL) || 686 local->hw.wiphy->cipher_suites) { 687 /* If the driver advertises, or doesn't support SW crypto, 688 * we only need to remove WEP if necessary. 689 */ 690 if (have_wep) 691 return 0; 692 693 /* well if it has _no_ ciphers ... fine */ 694 if (!local->hw.wiphy->n_cipher_suites) 695 return 0; 696 697 /* Driver provides cipher suites, but we need to exclude WEP */ 698 suites = kmemdup(local->hw.wiphy->cipher_suites, 699 sizeof(u32) * local->hw.wiphy->n_cipher_suites, 700 GFP_KERNEL); 701 if (!suites) 702 return -ENOMEM; 703 704 for (r = 0; r < local->hw.wiphy->n_cipher_suites; r++) { 705 u32 suite = local->hw.wiphy->cipher_suites[r]; 706 707 if (suite == WLAN_CIPHER_SUITE_WEP40 || 708 suite == WLAN_CIPHER_SUITE_WEP104) 709 continue; 710 suites[w++] = suite; 711 } 712 } else if (!local->hw.cipher_schemes) { 713 /* If the driver doesn't have cipher schemes, there's nothing 714 * else to do other than assign the (software supported and 715 * perhaps offloaded) cipher suites. 716 */ 717 local->hw.wiphy->cipher_suites = cipher_suites; 718 local->hw.wiphy->n_cipher_suites = ARRAY_SIZE(cipher_suites); 719 720 if (!have_mfp) 721 local->hw.wiphy->n_cipher_suites -= 4; 722 723 if (!have_wep) { 724 local->hw.wiphy->cipher_suites += 2; 725 local->hw.wiphy->n_cipher_suites -= 2; 726 } 727 728 /* not dynamically allocated, so just return */ 729 return 0; 730 } else { 731 const struct ieee80211_cipher_scheme *cs; 732 733 cs = local->hw.cipher_schemes; 734 735 /* Driver specifies cipher schemes only (but not cipher suites 736 * including the schemes) 737 * 738 * We start counting ciphers defined by schemes, TKIP, CCMP, 739 * CCMP-256, GCMP, and GCMP-256 740 */ 741 n_suites = local->hw.n_cipher_schemes + 5; 742 743 /* check if we have WEP40 and WEP104 */ 744 if (have_wep) 745 n_suites += 2; 746 747 /* check if we have AES_CMAC, BIP-CMAC-256, BIP-GMAC-128, 748 * BIP-GMAC-256 749 */ 750 if (have_mfp) 751 n_suites += 4; 752 753 suites = kmalloc(sizeof(u32) * n_suites, GFP_KERNEL); 754 if (!suites) 755 return -ENOMEM; 756 757 suites[w++] = WLAN_CIPHER_SUITE_CCMP; 758 suites[w++] = WLAN_CIPHER_SUITE_CCMP_256; 759 suites[w++] = WLAN_CIPHER_SUITE_TKIP; 760 suites[w++] = WLAN_CIPHER_SUITE_GCMP; 761 suites[w++] = WLAN_CIPHER_SUITE_GCMP_256; 762 763 if (have_wep) { 764 suites[w++] = WLAN_CIPHER_SUITE_WEP40; 765 suites[w++] = WLAN_CIPHER_SUITE_WEP104; 766 } 767 768 if (have_mfp) { 769 suites[w++] = WLAN_CIPHER_SUITE_AES_CMAC; 770 suites[w++] = WLAN_CIPHER_SUITE_BIP_CMAC_256; 771 suites[w++] = WLAN_CIPHER_SUITE_BIP_GMAC_128; 772 suites[w++] = WLAN_CIPHER_SUITE_BIP_GMAC_256; 773 } 774 775 for (r = 0; r < local->hw.n_cipher_schemes; r++) { 776 suites[w++] = cs[r].cipher; 777 if (WARN_ON(cs[r].pn_len > IEEE80211_MAX_PN_LEN)) { 778 kfree(suites); 779 return -EINVAL; 780 } 781 } 782 } 783 784 local->hw.wiphy->cipher_suites = suites; 785 local->hw.wiphy->n_cipher_suites = w; 786 local->wiphy_ciphers_allocated = true; 787 788 return 0; 789} 790 791int ieee80211_register_hw(struct ieee80211_hw *hw) 792{ 793 struct ieee80211_local *local = hw_to_local(hw); 794 int result, i; 795 enum ieee80211_band band; 796 int channels, max_bitrates; 797 bool supp_ht, supp_vht; 798 netdev_features_t feature_whitelist; 799 struct cfg80211_chan_def dflt_chandef = {}; 800 801 if (ieee80211_hw_check(hw, QUEUE_CONTROL) && 802 (local->hw.offchannel_tx_hw_queue == IEEE80211_INVAL_HW_QUEUE || 803 local->hw.offchannel_tx_hw_queue >= local->hw.queues)) 804 return -EINVAL; 805 806 if ((hw->wiphy->features & NL80211_FEATURE_TDLS_CHANNEL_SWITCH) && 807 (!local->ops->tdls_channel_switch || 808 !local->ops->tdls_cancel_channel_switch || 809 !local->ops->tdls_recv_channel_switch)) 810 return -EOPNOTSUPP; 811 812#ifdef CONFIG_PM 813 if (hw->wiphy->wowlan && (!local->ops->suspend || !local->ops->resume)) 814 return -EINVAL; 815#endif 816 817 if (!local->use_chanctx) { 818 for (i = 0; i < local->hw.wiphy->n_iface_combinations; i++) { 819 const struct ieee80211_iface_combination *comb; 820 821 comb = &local->hw.wiphy->iface_combinations[i]; 822 823 if (comb->num_different_channels > 1) 824 return -EINVAL; 825 } 826 } else { 827 /* 828 * WDS is currently prohibited when channel contexts are used 829 * because there's no clear definition of which channel WDS 830 * type interfaces use 831 */ 832 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_WDS)) 833 return -EINVAL; 834 835 /* DFS is not supported with multi-channel combinations yet */ 836 for (i = 0; i < local->hw.wiphy->n_iface_combinations; i++) { 837 const struct ieee80211_iface_combination *comb; 838 839 comb = &local->hw.wiphy->iface_combinations[i]; 840 841 if (comb->radar_detect_widths && 842 comb->num_different_channels > 1) 843 return -EINVAL; 844 } 845 } 846 847 /* Only HW csum features are currently compatible with mac80211 */ 848 feature_whitelist = NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM | 849 NETIF_F_HW_CSUM | NETIF_F_SG | NETIF_F_HIGHDMA | 850 NETIF_F_GSO_SOFTWARE; 851 if (WARN_ON(hw->netdev_features & ~feature_whitelist)) 852 return -EINVAL; 853 854 if (hw->max_report_rates == 0) 855 hw->max_report_rates = hw->max_rates; 856 857 local->rx_chains = 1; 858 859 /* 860 * generic code guarantees at least one band, 861 * set this very early because much code assumes 862 * that hw.conf.channel is assigned 863 */ 864 channels = 0; 865 max_bitrates = 0; 866 supp_ht = false; 867 supp_vht = false; 868 for (band = 0; band < IEEE80211_NUM_BANDS; band++) { 869 struct ieee80211_supported_band *sband; 870 871 sband = local->hw.wiphy->bands[band]; 872 if (!sband) 873 continue; 874 875 if (!dflt_chandef.chan) { 876 cfg80211_chandef_create(&dflt_chandef, 877 &sband->channels[0], 878 NL80211_CHAN_NO_HT); 879 /* init channel we're on */ 880 if (!local->use_chanctx && !local->_oper_chandef.chan) { 881 local->hw.conf.chandef = dflt_chandef; 882 local->_oper_chandef = dflt_chandef; 883 } 884 local->monitor_chandef = dflt_chandef; 885 } 886 887 channels += sband->n_channels; 888 889 if (max_bitrates < sband->n_bitrates) 890 max_bitrates = sband->n_bitrates; 891 supp_ht = supp_ht || sband->ht_cap.ht_supported; 892 supp_vht = supp_vht || sband->vht_cap.vht_supported; 893 894 if (sband->ht_cap.ht_supported) 895 local->rx_chains = 896 max(ieee80211_mcs_to_chains(&sband->ht_cap.mcs), 897 local->rx_chains); 898 899 /* TODO: consider VHT for RX chains, hopefully it's the same */ 900 } 901 902 /* if low-level driver supports AP, we also support VLAN */ 903 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_AP)) { 904 hw->wiphy->interface_modes |= BIT(NL80211_IFTYPE_AP_VLAN); 905 hw->wiphy->software_iftypes |= BIT(NL80211_IFTYPE_AP_VLAN); 906 } 907 908 /* mac80211 always supports monitor */ 909 hw->wiphy->interface_modes |= BIT(NL80211_IFTYPE_MONITOR); 910 hw->wiphy->software_iftypes |= BIT(NL80211_IFTYPE_MONITOR); 911 912 /* mac80211 doesn't support more than one IBSS interface right now */ 913 for (i = 0; i < hw->wiphy->n_iface_combinations; i++) { 914 const struct ieee80211_iface_combination *c; 915 int j; 916 917 c = &hw->wiphy->iface_combinations[i]; 918 919 for (j = 0; j < c->n_limits; j++) 920 if ((c->limits[j].types & BIT(NL80211_IFTYPE_ADHOC)) && 921 c->limits[j].max > 1) 922 return -EINVAL; 923 } 924 925 local->int_scan_req = kzalloc(sizeof(*local->int_scan_req) + 926 sizeof(void *) * channels, GFP_KERNEL); 927 if (!local->int_scan_req) 928 return -ENOMEM; 929 930 for (band = 0; band < IEEE80211_NUM_BANDS; band++) { 931 if (!local->hw.wiphy->bands[band]) 932 continue; 933 local->int_scan_req->rates[band] = (u32) -1; 934 } 935 936#ifndef CONFIG_MAC80211_MESH 937 /* mesh depends on Kconfig, but drivers should set it if they want */ 938 local->hw.wiphy->interface_modes &= ~BIT(NL80211_IFTYPE_MESH_POINT); 939#endif 940 941 /* if the underlying driver supports mesh, mac80211 will (at least) 942 * provide routing of mesh authentication frames to userspace */ 943 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_MESH_POINT)) 944 local->hw.wiphy->flags |= WIPHY_FLAG_MESH_AUTH; 945 946 /* mac80211 supports control port protocol changing */ 947 local->hw.wiphy->flags |= WIPHY_FLAG_CONTROL_PORT_PROTOCOL; 948 949 if (ieee80211_hw_check(&local->hw, SIGNAL_DBM)) { 950 local->hw.wiphy->signal_type = CFG80211_SIGNAL_TYPE_MBM; 951 } else if (ieee80211_hw_check(&local->hw, SIGNAL_UNSPEC)) { 952 local->hw.wiphy->signal_type = CFG80211_SIGNAL_TYPE_UNSPEC; 953 if (hw->max_signal <= 0) { 954 result = -EINVAL; 955 goto fail_wiphy_register; 956 } 957 } 958 959 /* 960 * Calculate scan IE length -- we need this to alloc 961 * memory and to subtract from the driver limit. It 962 * includes the DS Params, (extended) supported rates, and HT 963 * information -- SSID is the driver's responsibility. 964 */ 965 local->scan_ies_len = 4 + max_bitrates /* (ext) supp rates */ + 966 3 /* DS Params */; 967 if (supp_ht) 968 local->scan_ies_len += 2 + sizeof(struct ieee80211_ht_cap); 969 970 if (supp_vht) 971 local->scan_ies_len += 972 2 + sizeof(struct ieee80211_vht_cap); 973 974 if (!local->ops->hw_scan) { 975 /* For hw_scan, driver needs to set these up. */ 976 local->hw.wiphy->max_scan_ssids = 4; 977 local->hw.wiphy->max_scan_ie_len = IEEE80211_MAX_DATA_LEN; 978 } 979 980 /* 981 * If the driver supports any scan IEs, then assume the 982 * limit includes the IEs mac80211 will add, otherwise 983 * leave it at zero and let the driver sort it out; we 984 * still pass our IEs to the driver but userspace will 985 * not be allowed to in that case. 986 */ 987 if (local->hw.wiphy->max_scan_ie_len) 988 local->hw.wiphy->max_scan_ie_len -= local->scan_ies_len; 989 990 WARN_ON(!ieee80211_cs_list_valid(local->hw.cipher_schemes, 991 local->hw.n_cipher_schemes)); 992 993 result = ieee80211_init_cipher_suites(local); 994 if (result < 0) 995 goto fail_wiphy_register; 996 997 if (!local->ops->remain_on_channel) 998 local->hw.wiphy->max_remain_on_channel_duration = 5000; 999 1000 /* mac80211 based drivers don't support internal TDLS setup */ 1001 if (local->hw.wiphy->flags & WIPHY_FLAG_SUPPORTS_TDLS) 1002 local->hw.wiphy->flags |= WIPHY_FLAG_TDLS_EXTERNAL_SETUP; 1003 1004 /* mac80211 supports eCSA, if the driver supports STA CSA at all */ 1005 if (ieee80211_hw_check(&local->hw, CHANCTX_STA_CSA)) 1006 local->ext_capa[0] |= WLAN_EXT_CAPA1_EXT_CHANNEL_SWITCHING; 1007 1008 local->hw.wiphy->max_num_csa_counters = IEEE80211_MAX_CSA_COUNTERS_NUM; 1009 1010 result = wiphy_register(local->hw.wiphy); 1011 if (result < 0) 1012 goto fail_wiphy_register; 1013 1014 /* 1015 * We use the number of queues for feature tests (QoS, HT) internally 1016 * so restrict them appropriately. 1017 */ 1018 if (hw->queues > IEEE80211_MAX_QUEUES) 1019 hw->queues = IEEE80211_MAX_QUEUES; 1020 1021 local->workqueue = 1022 alloc_ordered_workqueue("%s", 0, wiphy_name(local->hw.wiphy)); 1023 if (!local->workqueue) { 1024 result = -ENOMEM; 1025 goto fail_workqueue; 1026 } 1027 1028 /* 1029 * The hardware needs headroom for sending the frame, 1030 * and we need some headroom for passing the frame to monitor 1031 * interfaces, but never both at the same time. 1032 */ 1033 local->tx_headroom = max_t(unsigned int , local->hw.extra_tx_headroom, 1034 IEEE80211_TX_STATUS_HEADROOM); 1035 1036 debugfs_hw_add(local); 1037 1038 /* 1039 * if the driver doesn't specify a max listen interval we 1040 * use 5 which should be a safe default 1041 */ 1042 if (local->hw.max_listen_interval == 0) 1043 local->hw.max_listen_interval = 5; 1044 1045 local->hw.conf.listen_interval = local->hw.max_listen_interval; 1046 1047 local->dynamic_ps_forced_timeout = -1; 1048 1049 if (!local->hw.txq_ac_max_pending) 1050 local->hw.txq_ac_max_pending = 64; 1051 1052 result = ieee80211_wep_init(local); 1053 if (result < 0) 1054 wiphy_debug(local->hw.wiphy, "Failed to initialize wep: %d\n", 1055 result); 1056 1057 local->hw.conf.flags = IEEE80211_CONF_IDLE; 1058 1059 ieee80211_led_init(local); 1060 1061 rtnl_lock(); 1062 1063 result = ieee80211_init_rate_ctrl_alg(local, 1064 hw->rate_control_algorithm); 1065 if (result < 0) { 1066 wiphy_debug(local->hw.wiphy, 1067 "Failed to initialize rate control algorithm\n"); 1068 goto fail_rate; 1069 } 1070 1071 /* add one default STA interface if supported */ 1072 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_STATION) && 1073 !ieee80211_hw_check(hw, NO_AUTO_VIF)) { 1074 result = ieee80211_if_add(local, "wlan%d", NET_NAME_ENUM, NULL, 1075 NL80211_IFTYPE_STATION, NULL); 1076 if (result) 1077 wiphy_warn(local->hw.wiphy, 1078 "Failed to add default virtual iface\n"); 1079 } 1080 1081 rtnl_unlock(); 1082 1083#ifdef CONFIG_INET 1084 local->ifa_notifier.notifier_call = ieee80211_ifa_changed; 1085 result = register_inetaddr_notifier(&local->ifa_notifier); 1086 if (result) 1087 goto fail_ifa; 1088#endif 1089 1090#if IS_ENABLED(CONFIG_IPV6) 1091 local->ifa6_notifier.notifier_call = ieee80211_ifa6_changed; 1092 result = register_inet6addr_notifier(&local->ifa6_notifier); 1093 if (result) 1094 goto fail_ifa6; 1095#endif 1096 1097 return 0; 1098 1099#if IS_ENABLED(CONFIG_IPV6) 1100 fail_ifa6: 1101#ifdef CONFIG_INET 1102 unregister_inetaddr_notifier(&local->ifa_notifier); 1103#endif 1104#endif 1105#if defined(CONFIG_INET) || defined(CONFIG_IPV6) 1106 fail_ifa: 1107#endif 1108 rtnl_lock(); 1109 rate_control_deinitialize(local); 1110 ieee80211_remove_interfaces(local); 1111 fail_rate: 1112 rtnl_unlock(); 1113 ieee80211_led_exit(local); 1114 ieee80211_wep_free(local); 1115 destroy_workqueue(local->workqueue); 1116 fail_workqueue: 1117 wiphy_unregister(local->hw.wiphy); 1118 fail_wiphy_register: 1119 if (local->wiphy_ciphers_allocated) 1120 kfree(local->hw.wiphy->cipher_suites); 1121 kfree(local->int_scan_req); 1122 return result; 1123} 1124EXPORT_SYMBOL(ieee80211_register_hw); 1125 1126void ieee80211_unregister_hw(struct ieee80211_hw *hw) 1127{ 1128 struct ieee80211_local *local = hw_to_local(hw); 1129 1130 tasklet_kill(&local->tx_pending_tasklet); 1131 tasklet_kill(&local->tasklet); 1132 1133#ifdef CONFIG_INET 1134 unregister_inetaddr_notifier(&local->ifa_notifier); 1135#endif 1136#if IS_ENABLED(CONFIG_IPV6) 1137 unregister_inet6addr_notifier(&local->ifa6_notifier); 1138#endif 1139 1140 rtnl_lock(); 1141 1142 /* 1143 * At this point, interface list manipulations are fine 1144 * because the driver cannot be handing us frames any 1145 * more and the tasklet is killed. 1146 */ 1147 ieee80211_remove_interfaces(local); 1148 1149 rtnl_unlock(); 1150 1151 cancel_work_sync(&local->restart_work); 1152 cancel_work_sync(&local->reconfig_filter); 1153 cancel_work_sync(&local->tdls_chsw_work); 1154 flush_work(&local->sched_scan_stopped_work); 1155 1156 ieee80211_clear_tx_pending(local); 1157 rate_control_deinitialize(local); 1158 1159 if (skb_queue_len(&local->skb_queue) || 1160 skb_queue_len(&local->skb_queue_unreliable)) 1161 wiphy_warn(local->hw.wiphy, "skb_queue not empty\n"); 1162 skb_queue_purge(&local->skb_queue); 1163 skb_queue_purge(&local->skb_queue_unreliable); 1164 skb_queue_purge(&local->skb_queue_tdls_chsw); 1165 1166 destroy_workqueue(local->workqueue); 1167 wiphy_unregister(local->hw.wiphy); 1168 ieee80211_wep_free(local); 1169 ieee80211_led_exit(local); 1170 kfree(local->int_scan_req); 1171} 1172EXPORT_SYMBOL(ieee80211_unregister_hw); 1173 1174static int ieee80211_free_ack_frame(int id, void *p, void *data) 1175{ 1176 WARN_ONCE(1, "Have pending ack frames!\n"); 1177 kfree_skb(p); 1178 return 0; 1179} 1180 1181void ieee80211_free_hw(struct ieee80211_hw *hw) 1182{ 1183 struct ieee80211_local *local = hw_to_local(hw); 1184 1185 mutex_destroy(&local->iflist_mtx); 1186 mutex_destroy(&local->mtx); 1187 1188 if (local->wiphy_ciphers_allocated) 1189 kfree(local->hw.wiphy->cipher_suites); 1190 1191 idr_for_each(&local->ack_status_frames, 1192 ieee80211_free_ack_frame, NULL); 1193 idr_destroy(&local->ack_status_frames); 1194 1195 sta_info_stop(local); 1196 1197 ieee80211_free_led_names(local); 1198 1199 wiphy_free(local->hw.wiphy); 1200} 1201EXPORT_SYMBOL(ieee80211_free_hw); 1202 1203static int __init ieee80211_init(void) 1204{ 1205 struct sk_buff *skb; 1206 int ret; 1207 1208 BUILD_BUG_ON(sizeof(struct ieee80211_tx_info) > sizeof(skb->cb)); 1209 BUILD_BUG_ON(offsetof(struct ieee80211_tx_info, driver_data) + 1210 IEEE80211_TX_INFO_DRIVER_DATA_SIZE > sizeof(skb->cb)); 1211 1212 ret = rc80211_minstrel_init(); 1213 if (ret) 1214 return ret; 1215 1216 ret = rc80211_minstrel_ht_init(); 1217 if (ret) 1218 goto err_minstrel; 1219 1220 ret = ieee80211_iface_init(); 1221 if (ret) 1222 goto err_netdev; 1223 1224 return 0; 1225 err_netdev: 1226 rc80211_minstrel_ht_exit(); 1227 err_minstrel: 1228 rc80211_minstrel_exit(); 1229 1230 return ret; 1231} 1232 1233static void __exit ieee80211_exit(void) 1234{ 1235 rc80211_minstrel_ht_exit(); 1236 rc80211_minstrel_exit(); 1237 1238 ieee80211s_stop(); 1239 1240 ieee80211_iface_exit(); 1241 1242 rcu_barrier(); 1243} 1244 1245 1246subsys_initcall(ieee80211_init); 1247module_exit(ieee80211_exit); 1248 1249MODULE_DESCRIPTION("IEEE 802.11 subsystem"); 1250MODULE_LICENSE("GPL"); 1251