1// SPDX-License-Identifier: GPL-2.0-only 2/* 3 * Interface handling 4 * 5 * Copyright 2002-2005, Instant802 Networks, Inc. 6 * Copyright 2005-2006, Devicescape Software, Inc. 7 * Copyright (c) 2006 Jiri Benc <jbenc@suse.cz> 8 * Copyright 2008, Johannes Berg <johannes@sipsolutions.net> 9 * Copyright 2013-2014 Intel Mobile Communications GmbH 10 * Copyright (c) 2016 Intel Deutschland GmbH 11 * Copyright (C) 2018-2021 Intel Corporation 12 */ 13#include <linux/slab.h> 14#include <linux/kernel.h> 15#include <linux/if_arp.h> 16#include <linux/netdevice.h> 17#include <linux/rtnetlink.h> 18#include <net/mac80211.h> 19#include <net/ieee80211_radiotap.h> 20#include "ieee80211_i.h" 21#include "sta_info.h" 22#include "debugfs_netdev.h" 23#include "mesh.h" 24#include "led.h" 25#include "driver-ops.h" 26#include "wme.h" 27#include "rate.h" 28 29/** 30 * DOC: Interface list locking 31 * 32 * The interface list in each struct ieee80211_local is protected 33 * three-fold: 34 * 35 * (1) modifications may only be done under the RTNL 36 * (2) modifications and readers are protected against each other by 37 * the iflist_mtx. 38 * (3) modifications are done in an RCU manner so atomic readers 39 * can traverse the list in RCU-safe blocks. 40 * 41 * As a consequence, reads (traversals) of the list can be protected 42 * by either the RTNL, the iflist_mtx or RCU. 43 */ 44 45static void ieee80211_iface_work(struct work_struct *work); 46 47bool __ieee80211_recalc_txpower(struct ieee80211_sub_if_data *sdata) 48{ 49 struct ieee80211_chanctx_conf *chanctx_conf; 50 int power; 51 52 rcu_read_lock(); 53 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf); 54 if (!chanctx_conf) { 55 rcu_read_unlock(); 56 return false; 57 } 58 59 power = ieee80211_chandef_max_power(&chanctx_conf->def); 60 rcu_read_unlock(); 61 62 if (sdata->user_power_level != IEEE80211_UNSET_POWER_LEVEL) 63 power = min(power, sdata->user_power_level); 64 65 if (sdata->ap_power_level != IEEE80211_UNSET_POWER_LEVEL) 66 power = min(power, sdata->ap_power_level); 67 68 if (power != sdata->vif.bss_conf.txpower) { 69 sdata->vif.bss_conf.txpower = power; 70 ieee80211_hw_config(sdata->local, 0); 71 return true; 72 } 73 74 return false; 75} 76 77void ieee80211_recalc_txpower(struct ieee80211_sub_if_data *sdata, 78 bool update_bss) 79{ 80 if (__ieee80211_recalc_txpower(sdata) || 81 (update_bss && ieee80211_sdata_running(sdata))) 82 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_TXPOWER); 83} 84 85static u32 __ieee80211_idle_off(struct ieee80211_local *local) 86{ 87 if (!(local->hw.conf.flags & IEEE80211_CONF_IDLE)) 88 return 0; 89 90 local->hw.conf.flags &= ~IEEE80211_CONF_IDLE; 91 return IEEE80211_CONF_CHANGE_IDLE; 92} 93 94static u32 __ieee80211_idle_on(struct ieee80211_local *local) 95{ 96 if (local->hw.conf.flags & IEEE80211_CONF_IDLE) 97 return 0; 98 99 ieee80211_flush_queues(local, NULL, false); 100 101 local->hw.conf.flags |= IEEE80211_CONF_IDLE; 102 return IEEE80211_CONF_CHANGE_IDLE; 103} 104 105static u32 __ieee80211_recalc_idle(struct ieee80211_local *local, 106 bool force_active) 107{ 108 bool working, scanning, active; 109 unsigned int led_trig_start = 0, led_trig_stop = 0; 110 111 lockdep_assert_held(&local->mtx); 112 113 active = force_active || 114 !list_empty(&local->chanctx_list) || 115 local->monitors; 116 117 working = !local->ops->remain_on_channel && 118 !list_empty(&local->roc_list); 119 120 scanning = test_bit(SCAN_SW_SCANNING, &local->scanning) || 121 test_bit(SCAN_ONCHANNEL_SCANNING, &local->scanning); 122 123 if (working || scanning) 124 led_trig_start |= IEEE80211_TPT_LEDTRIG_FL_WORK; 125 else 126 led_trig_stop |= IEEE80211_TPT_LEDTRIG_FL_WORK; 127 128 if (active) 129 led_trig_start |= IEEE80211_TPT_LEDTRIG_FL_CONNECTED; 130 else 131 led_trig_stop |= IEEE80211_TPT_LEDTRIG_FL_CONNECTED; 132 133 ieee80211_mod_tpt_led_trig(local, led_trig_start, led_trig_stop); 134 135 if (working || scanning || active) 136 return __ieee80211_idle_off(local); 137 return __ieee80211_idle_on(local); 138} 139 140u32 ieee80211_idle_off(struct ieee80211_local *local) 141{ 142 return __ieee80211_recalc_idle(local, true); 143} 144 145void ieee80211_recalc_idle(struct ieee80211_local *local) 146{ 147 u32 change = __ieee80211_recalc_idle(local, false); 148 if (change) 149 ieee80211_hw_config(local, change); 150} 151 152static int ieee80211_verify_mac(struct ieee80211_sub_if_data *sdata, u8 *addr, 153 bool check_dup) 154{ 155 struct ieee80211_local *local = sdata->local; 156 struct ieee80211_sub_if_data *iter; 157 u64 new, mask, tmp; 158 u8 *m; 159 int ret = 0; 160 161 if (is_zero_ether_addr(local->hw.wiphy->addr_mask)) 162 return 0; 163 164 m = addr; 165 new = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) | 166 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) | 167 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8); 168 169 m = local->hw.wiphy->addr_mask; 170 mask = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) | 171 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) | 172 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8); 173 174 if (!check_dup) 175 return ret; 176 177 mutex_lock(&local->iflist_mtx); 178 list_for_each_entry(iter, &local->interfaces, list) { 179 if (iter == sdata) 180 continue; 181 182 if (iter->vif.type == NL80211_IFTYPE_MONITOR && 183 !(iter->u.mntr.flags & MONITOR_FLAG_ACTIVE)) 184 continue; 185 186 m = iter->vif.addr; 187 tmp = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) | 188 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) | 189 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8); 190 191 if ((new & ~mask) != (tmp & ~mask)) { 192 ret = -EINVAL; 193 break; 194 } 195 } 196 mutex_unlock(&local->iflist_mtx); 197 198 return ret; 199} 200 201static int ieee80211_change_mac(struct net_device *dev, void *addr) 202{ 203 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); 204 struct sockaddr *sa = addr; 205 bool check_dup = true; 206 int ret; 207 208 if (ieee80211_sdata_running(sdata)) 209 return -EBUSY; 210 211 if (sdata->vif.type == NL80211_IFTYPE_MONITOR && 212 !(sdata->u.mntr.flags & MONITOR_FLAG_ACTIVE)) 213 check_dup = false; 214 215 ret = ieee80211_verify_mac(sdata, sa->sa_data, check_dup); 216 if (ret) 217 return ret; 218 219 ret = eth_mac_addr(dev, sa); 220 221 if (ret == 0) 222 memcpy(sdata->vif.addr, sa->sa_data, ETH_ALEN); 223 224 return ret; 225} 226 227static inline int identical_mac_addr_allowed(int type1, int type2) 228{ 229 return type1 == NL80211_IFTYPE_MONITOR || 230 type2 == NL80211_IFTYPE_MONITOR || 231 type1 == NL80211_IFTYPE_P2P_DEVICE || 232 type2 == NL80211_IFTYPE_P2P_DEVICE || 233 (type1 == NL80211_IFTYPE_AP && type2 == NL80211_IFTYPE_WDS) || 234 (type1 == NL80211_IFTYPE_WDS && 235 (type2 == NL80211_IFTYPE_WDS || 236 type2 == NL80211_IFTYPE_AP)) || 237 (type1 == NL80211_IFTYPE_AP && type2 == NL80211_IFTYPE_AP_VLAN) || 238 (type1 == NL80211_IFTYPE_AP_VLAN && 239 (type2 == NL80211_IFTYPE_AP || 240 type2 == NL80211_IFTYPE_AP_VLAN)); 241} 242 243static int ieee80211_check_concurrent_iface(struct ieee80211_sub_if_data *sdata, 244 enum nl80211_iftype iftype) 245{ 246 struct ieee80211_local *local = sdata->local; 247 struct ieee80211_sub_if_data *nsdata; 248 int ret; 249 250 ASSERT_RTNL(); 251 252 /* we hold the RTNL here so can safely walk the list */ 253 list_for_each_entry(nsdata, &local->interfaces, list) { 254 if (nsdata != sdata && ieee80211_sdata_running(nsdata)) { 255 /* 256 * Only OCB and monitor mode may coexist 257 */ 258 if ((sdata->vif.type == NL80211_IFTYPE_OCB && 259 nsdata->vif.type != NL80211_IFTYPE_MONITOR) || 260 (sdata->vif.type != NL80211_IFTYPE_MONITOR && 261 nsdata->vif.type == NL80211_IFTYPE_OCB)) 262 return -EBUSY; 263 264 /* 265 * Allow only a single IBSS interface to be up at any 266 * time. This is restricted because beacon distribution 267 * cannot work properly if both are in the same IBSS. 268 * 269 * To remove this restriction we'd have to disallow them 270 * from setting the same SSID on different IBSS interfaces 271 * belonging to the same hardware. Then, however, we're 272 * faced with having to adopt two different TSF timers... 273 */ 274 if (iftype == NL80211_IFTYPE_ADHOC && 275 nsdata->vif.type == NL80211_IFTYPE_ADHOC) 276 return -EBUSY; 277 /* 278 * will not add another interface while any channel 279 * switch is active. 280 */ 281 if (nsdata->vif.csa_active) 282 return -EBUSY; 283 284 /* 285 * The remaining checks are only performed for interfaces 286 * with the same MAC address. 287 */ 288 if (!ether_addr_equal(sdata->vif.addr, 289 nsdata->vif.addr)) 290 continue; 291 292 /* 293 * check whether it may have the same address 294 */ 295 if (!identical_mac_addr_allowed(iftype, 296 nsdata->vif.type)) 297 return -ENOTUNIQ; 298 299 /* 300 * can only add VLANs to enabled APs 301 */ 302 if (iftype == NL80211_IFTYPE_AP_VLAN && 303 nsdata->vif.type == NL80211_IFTYPE_AP) 304 sdata->bss = &nsdata->u.ap; 305 } 306 } 307 308 mutex_lock(&local->chanctx_mtx); 309 ret = ieee80211_check_combinations(sdata, NULL, 0, 0); 310 mutex_unlock(&local->chanctx_mtx); 311 return ret; 312} 313 314static int ieee80211_check_queues(struct ieee80211_sub_if_data *sdata, 315 enum nl80211_iftype iftype) 316{ 317 int n_queues = sdata->local->hw.queues; 318 int i; 319 320 if (iftype == NL80211_IFTYPE_NAN) 321 return 0; 322 323 if (iftype != NL80211_IFTYPE_P2P_DEVICE) { 324 for (i = 0; i < IEEE80211_NUM_ACS; i++) { 325 if (WARN_ON_ONCE(sdata->vif.hw_queue[i] == 326 IEEE80211_INVAL_HW_QUEUE)) 327 return -EINVAL; 328 if (WARN_ON_ONCE(sdata->vif.hw_queue[i] >= 329 n_queues)) 330 return -EINVAL; 331 } 332 } 333 334 if ((iftype != NL80211_IFTYPE_AP && 335 iftype != NL80211_IFTYPE_P2P_GO && 336 iftype != NL80211_IFTYPE_MESH_POINT) || 337 !ieee80211_hw_check(&sdata->local->hw, QUEUE_CONTROL)) { 338 sdata->vif.cab_queue = IEEE80211_INVAL_HW_QUEUE; 339 return 0; 340 } 341 342 if (WARN_ON_ONCE(sdata->vif.cab_queue == IEEE80211_INVAL_HW_QUEUE)) 343 return -EINVAL; 344 345 if (WARN_ON_ONCE(sdata->vif.cab_queue >= n_queues)) 346 return -EINVAL; 347 348 return 0; 349} 350 351static int ieee80211_open(struct net_device *dev) 352{ 353 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); 354 int err; 355 356 /* fail early if user set an invalid address */ 357 if (!is_valid_ether_addr(dev->dev_addr)) 358 return -EADDRNOTAVAIL; 359 360 err = ieee80211_check_concurrent_iface(sdata, sdata->vif.type); 361 if (err) 362 return err; 363 364 return ieee80211_do_open(&sdata->wdev, true); 365} 366 367static void ieee80211_do_stop(struct ieee80211_sub_if_data *sdata, 368 bool going_down) 369{ 370 struct ieee80211_local *local = sdata->local; 371 unsigned long flags; 372 struct sk_buff *skb, *tmp; 373 u32 hw_reconf_flags = 0; 374 int i, flushed; 375 struct ps_data *ps; 376 struct cfg80211_chan_def chandef; 377 bool cancel_scan; 378 struct cfg80211_nan_func *func; 379 380 clear_bit(SDATA_STATE_RUNNING, &sdata->state); 381 382 cancel_scan = rcu_access_pointer(local->scan_sdata) == sdata; 383 if (cancel_scan) 384 ieee80211_scan_cancel(local); 385 386 /* 387 * Stop TX on this interface first. 388 */ 389 if (sdata->dev) 390 netif_tx_stop_all_queues(sdata->dev); 391 392 ieee80211_roc_purge(local, sdata); 393 394 switch (sdata->vif.type) { 395 case NL80211_IFTYPE_STATION: 396 ieee80211_mgd_stop(sdata); 397 break; 398 case NL80211_IFTYPE_ADHOC: 399 ieee80211_ibss_stop(sdata); 400 break; 401 case NL80211_IFTYPE_MONITOR: 402 if (sdata->u.mntr.flags & MONITOR_FLAG_COOK_FRAMES) 403 break; 404 list_del_rcu(&sdata->u.mntr.list); 405 break; 406 default: 407 break; 408 } 409 410 /* 411 * Remove all stations associated with this interface. 412 * 413 * This must be done before calling ops->remove_interface() 414 * because otherwise we can later invoke ops->sta_notify() 415 * whenever the STAs are removed, and that invalidates driver 416 * assumptions about always getting a vif pointer that is valid 417 * (because if we remove a STA after ops->remove_interface() 418 * the driver will have removed the vif info already!) 419 * 420 * In WDS mode a station must exist here and be flushed, for 421 * AP_VLANs stations may exist since there's nothing else that 422 * would have removed them, but in other modes there shouldn't 423 * be any stations. 424 */ 425 flushed = sta_info_flush(sdata); 426 WARN_ON_ONCE(sdata->vif.type != NL80211_IFTYPE_AP_VLAN && 427 ((sdata->vif.type != NL80211_IFTYPE_WDS && flushed > 0) || 428 (sdata->vif.type == NL80211_IFTYPE_WDS && flushed != 1))); 429 430 /* don't count this interface for allmulti while it is down */ 431 if (sdata->flags & IEEE80211_SDATA_ALLMULTI) 432 atomic_dec(&local->iff_allmultis); 433 434 if (sdata->vif.type == NL80211_IFTYPE_AP) { 435 local->fif_pspoll--; 436 local->fif_probe_req--; 437 } else if (sdata->vif.type == NL80211_IFTYPE_ADHOC) { 438 local->fif_probe_req--; 439 } 440 441 if (sdata->dev) { 442 netif_addr_lock_bh(sdata->dev); 443 spin_lock_bh(&local->filter_lock); 444 __hw_addr_unsync(&local->mc_list, &sdata->dev->mc, 445 sdata->dev->addr_len); 446 spin_unlock_bh(&local->filter_lock); 447 netif_addr_unlock_bh(sdata->dev); 448 } 449 450 del_timer_sync(&local->dynamic_ps_timer); 451 cancel_work_sync(&local->dynamic_ps_enable_work); 452 453 cancel_work_sync(&sdata->recalc_smps); 454 sdata_lock(sdata); 455 mutex_lock(&local->mtx); 456 sdata->vif.csa_active = false; 457 if (sdata->vif.type == NL80211_IFTYPE_STATION) 458 sdata->u.mgd.csa_waiting_bcn = false; 459 if (sdata->csa_block_tx) { 460 ieee80211_wake_vif_queues(local, sdata, 461 IEEE80211_QUEUE_STOP_REASON_CSA); 462 sdata->csa_block_tx = false; 463 } 464 mutex_unlock(&local->mtx); 465 sdata_unlock(sdata); 466 467 cancel_work_sync(&sdata->csa_finalize_work); 468 469 cancel_delayed_work_sync(&sdata->dfs_cac_timer_work); 470 471 if (sdata->wdev.cac_started) { 472 chandef = sdata->vif.bss_conf.chandef; 473 WARN_ON(local->suspended); 474 mutex_lock(&local->mtx); 475 ieee80211_vif_release_channel(sdata); 476 mutex_unlock(&local->mtx); 477 cfg80211_cac_event(sdata->dev, &chandef, 478 NL80211_RADAR_CAC_ABORTED, 479 GFP_KERNEL); 480 } 481 482 /* APs need special treatment */ 483 if (sdata->vif.type == NL80211_IFTYPE_AP) { 484 struct ieee80211_sub_if_data *vlan, *tmpsdata; 485 486 /* down all dependent devices, that is VLANs */ 487 list_for_each_entry_safe(vlan, tmpsdata, &sdata->u.ap.vlans, 488 u.vlan.list) 489 dev_close(vlan->dev); 490 WARN_ON(!list_empty(&sdata->u.ap.vlans)); 491 } else if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) { 492 /* remove all packets in parent bc_buf pointing to this dev */ 493 ps = &sdata->bss->ps; 494 495 spin_lock_irqsave(&ps->bc_buf.lock, flags); 496 skb_queue_walk_safe(&ps->bc_buf, skb, tmp) { 497 if (skb->dev == sdata->dev) { 498 __skb_unlink(skb, &ps->bc_buf); 499 local->total_ps_buffered--; 500 ieee80211_free_txskb(&local->hw, skb); 501 } 502 } 503 spin_unlock_irqrestore(&ps->bc_buf.lock, flags); 504 } 505 506 if (going_down) 507 local->open_count--; 508 509 switch (sdata->vif.type) { 510 case NL80211_IFTYPE_AP_VLAN: 511 mutex_lock(&local->mtx); 512 list_del(&sdata->u.vlan.list); 513 mutex_unlock(&local->mtx); 514 RCU_INIT_POINTER(sdata->vif.chanctx_conf, NULL); 515 /* see comment in the default case below */ 516 ieee80211_free_keys(sdata, true); 517 /* no need to tell driver */ 518 break; 519 case NL80211_IFTYPE_MONITOR: 520 if (sdata->u.mntr.flags & MONITOR_FLAG_COOK_FRAMES) { 521 local->cooked_mntrs--; 522 break; 523 } 524 525 local->monitors--; 526 if (local->monitors == 0) { 527 local->hw.conf.flags &= ~IEEE80211_CONF_MONITOR; 528 hw_reconf_flags |= IEEE80211_CONF_CHANGE_MONITOR; 529 } 530 531 ieee80211_adjust_monitor_flags(sdata, -1); 532 break; 533 case NL80211_IFTYPE_NAN: 534 /* clean all the functions */ 535 spin_lock_bh(&sdata->u.nan.func_lock); 536 537 idr_for_each_entry(&sdata->u.nan.function_inst_ids, func, i) { 538 idr_remove(&sdata->u.nan.function_inst_ids, i); 539 cfg80211_free_nan_func(func); 540 } 541 idr_destroy(&sdata->u.nan.function_inst_ids); 542 543 spin_unlock_bh(&sdata->u.nan.func_lock); 544 break; 545 case NL80211_IFTYPE_P2P_DEVICE: 546 /* relies on synchronize_rcu() below */ 547 RCU_INIT_POINTER(local->p2p_sdata, NULL); 548 fallthrough; 549 default: 550 cancel_work_sync(&sdata->work); 551 /* 552 * When we get here, the interface is marked down. 553 * Free the remaining keys, if there are any 554 * (which can happen in AP mode if userspace sets 555 * keys before the interface is operating, and maybe 556 * also in WDS mode) 557 * 558 * Force the key freeing to always synchronize_net() 559 * to wait for the RX path in case it is using this 560 * interface enqueuing frames at this very time on 561 * another CPU. 562 */ 563 ieee80211_free_keys(sdata, true); 564 skb_queue_purge(&sdata->skb_queue); 565 } 566 567 spin_lock_irqsave(&local->queue_stop_reason_lock, flags); 568 for (i = 0; i < IEEE80211_MAX_QUEUES; i++) { 569 skb_queue_walk_safe(&local->pending[i], skb, tmp) { 570 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); 571 if (info->control.vif == &sdata->vif) { 572 __skb_unlink(skb, &local->pending[i]); 573 ieee80211_free_txskb(&local->hw, skb); 574 } 575 } 576 } 577 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); 578 579 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) 580 ieee80211_txq_remove_vlan(local, sdata); 581 582 sdata->bss = NULL; 583 584 if (local->open_count == 0) 585 ieee80211_clear_tx_pending(local); 586 587 sdata->vif.bss_conf.beacon_int = 0; 588 589 /* 590 * If the interface goes down while suspended, presumably because 591 * the device was unplugged and that happens before our resume, 592 * then the driver is already unconfigured and the remainder of 593 * this function isn't needed. 594 * XXX: what about WoWLAN? If the device has software state, e.g. 595 * memory allocated, it might expect teardown commands from 596 * mac80211 here? 597 */ 598 if (local->suspended) { 599 WARN_ON(local->wowlan); 600 WARN_ON(rtnl_dereference(local->monitor_sdata)); 601 return; 602 } 603 604 switch (sdata->vif.type) { 605 case NL80211_IFTYPE_AP_VLAN: 606 break; 607 case NL80211_IFTYPE_MONITOR: 608 if (local->monitors == 0) 609 ieee80211_del_virtual_monitor(local); 610 611 mutex_lock(&local->mtx); 612 ieee80211_recalc_idle(local); 613 mutex_unlock(&local->mtx); 614 615 if (!(sdata->u.mntr.flags & MONITOR_FLAG_ACTIVE)) 616 break; 617 618 fallthrough; 619 default: 620 if (going_down) 621 drv_remove_interface(local, sdata); 622 } 623 624 ieee80211_recalc_ps(local); 625 626 if (cancel_scan) 627 flush_delayed_work(&local->scan_work); 628 629 if (local->open_count == 0) { 630 ieee80211_stop_device(local); 631 632 /* no reconfiguring after stop! */ 633 return; 634 } 635 636 /* do after stop to avoid reconfiguring when we stop anyway */ 637 ieee80211_configure_filter(local); 638 ieee80211_hw_config(local, hw_reconf_flags); 639 640 if (local->monitors == local->open_count) 641 ieee80211_add_virtual_monitor(local); 642} 643 644static int ieee80211_stop(struct net_device *dev) 645{ 646 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); 647 648 ieee80211_do_stop(sdata, true); 649 650 return 0; 651} 652 653static void ieee80211_set_multicast_list(struct net_device *dev) 654{ 655 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); 656 struct ieee80211_local *local = sdata->local; 657 int allmulti, sdata_allmulti; 658 659 allmulti = !!(dev->flags & IFF_ALLMULTI); 660 sdata_allmulti = !!(sdata->flags & IEEE80211_SDATA_ALLMULTI); 661 662 if (allmulti != sdata_allmulti) { 663 if (dev->flags & IFF_ALLMULTI) 664 atomic_inc(&local->iff_allmultis); 665 else 666 atomic_dec(&local->iff_allmultis); 667 sdata->flags ^= IEEE80211_SDATA_ALLMULTI; 668 } 669 670 spin_lock_bh(&local->filter_lock); 671 __hw_addr_sync(&local->mc_list, &dev->mc, dev->addr_len); 672 spin_unlock_bh(&local->filter_lock); 673 ieee80211_queue_work(&local->hw, &local->reconfig_filter); 674} 675 676/* 677 * Called when the netdev is removed or, by the code below, before 678 * the interface type changes. 679 */ 680static void ieee80211_teardown_sdata(struct ieee80211_sub_if_data *sdata) 681{ 682 /* free extra data */ 683 ieee80211_free_keys(sdata, false); 684 685 ieee80211_debugfs_remove_netdev(sdata); 686 687 ieee80211_destroy_frag_cache(&sdata->frags); 688 689 if (ieee80211_vif_is_mesh(&sdata->vif)) 690 ieee80211_mesh_teardown_sdata(sdata); 691} 692 693static void ieee80211_uninit(struct net_device *dev) 694{ 695 ieee80211_teardown_sdata(IEEE80211_DEV_TO_SUB_IF(dev)); 696} 697 698static u16 ieee80211_netdev_select_queue(struct net_device *dev, 699 struct sk_buff *skb, 700 struct net_device *sb_dev) 701{ 702 return ieee80211_select_queue(IEEE80211_DEV_TO_SUB_IF(dev), skb); 703} 704 705static void 706ieee80211_get_stats64(struct net_device *dev, struct rtnl_link_stats64 *stats) 707{ 708 dev_fetch_sw_netstats(stats, dev->tstats); 709} 710 711static const struct net_device_ops ieee80211_dataif_ops = { 712 .ndo_open = ieee80211_open, 713 .ndo_stop = ieee80211_stop, 714 .ndo_uninit = ieee80211_uninit, 715 .ndo_start_xmit = ieee80211_subif_start_xmit, 716 .ndo_set_rx_mode = ieee80211_set_multicast_list, 717 .ndo_set_mac_address = ieee80211_change_mac, 718 .ndo_select_queue = ieee80211_netdev_select_queue, 719 .ndo_get_stats64 = ieee80211_get_stats64, 720}; 721 722static u16 ieee80211_monitor_select_queue(struct net_device *dev, 723 struct sk_buff *skb, 724 struct net_device *sb_dev) 725{ 726 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); 727 struct ieee80211_local *local = sdata->local; 728 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); 729 struct ieee80211_hdr *hdr; 730 int len_rthdr; 731 732 if (local->hw.queues < IEEE80211_NUM_ACS) 733 return 0; 734 735 /* reset flags and info before parsing radiotap header */ 736 memset(info, 0, sizeof(*info)); 737 738 if (!ieee80211_parse_tx_radiotap(skb, dev)) 739 return 0; /* doesn't matter, frame will be dropped */ 740 741 len_rthdr = ieee80211_get_radiotap_len(skb->data); 742 hdr = (struct ieee80211_hdr *)(skb->data + len_rthdr); 743 if (skb->len < len_rthdr + 2 || 744 skb->len < len_rthdr + ieee80211_hdrlen(hdr->frame_control)) 745 return 0; /* doesn't matter, frame will be dropped */ 746 747 return ieee80211_select_queue_80211(sdata, skb, hdr); 748} 749 750static const struct net_device_ops ieee80211_monitorif_ops = { 751 .ndo_open = ieee80211_open, 752 .ndo_stop = ieee80211_stop, 753 .ndo_uninit = ieee80211_uninit, 754 .ndo_start_xmit = ieee80211_monitor_start_xmit, 755 .ndo_set_rx_mode = ieee80211_set_multicast_list, 756 .ndo_set_mac_address = ieee80211_change_mac, 757 .ndo_select_queue = ieee80211_monitor_select_queue, 758 .ndo_get_stats64 = ieee80211_get_stats64, 759}; 760 761static const struct net_device_ops ieee80211_dataif_8023_ops = { 762 .ndo_open = ieee80211_open, 763 .ndo_stop = ieee80211_stop, 764 .ndo_uninit = ieee80211_uninit, 765 .ndo_start_xmit = ieee80211_subif_start_xmit_8023, 766 .ndo_set_rx_mode = ieee80211_set_multicast_list, 767 .ndo_set_mac_address = ieee80211_change_mac, 768 .ndo_select_queue = ieee80211_netdev_select_queue, 769 .ndo_get_stats64 = ieee80211_get_stats64, 770}; 771 772static bool ieee80211_iftype_supports_encap_offload(enum nl80211_iftype iftype) 773{ 774 switch (iftype) { 775 /* P2P GO and client are mapped to AP/STATION types */ 776 case NL80211_IFTYPE_AP: 777 case NL80211_IFTYPE_STATION: 778 return true; 779 default: 780 return false; 781 } 782} 783 784static bool ieee80211_set_sdata_offload_flags(struct ieee80211_sub_if_data *sdata) 785{ 786 struct ieee80211_local *local = sdata->local; 787 u32 flags; 788 789 flags = sdata->vif.offload_flags; 790 791 if (ieee80211_hw_check(&local->hw, SUPPORTS_TX_ENCAP_OFFLOAD) && 792 ieee80211_iftype_supports_encap_offload(sdata->vif.type)) { 793 flags |= IEEE80211_OFFLOAD_ENCAP_ENABLED; 794 795 if (!ieee80211_hw_check(&local->hw, SUPPORTS_TX_FRAG) && 796 local->hw.wiphy->frag_threshold != (u32)-1) 797 flags &= ~IEEE80211_OFFLOAD_ENCAP_ENABLED; 798 799 if (local->monitors) 800 flags &= ~IEEE80211_OFFLOAD_ENCAP_ENABLED; 801 } else { 802 flags &= ~IEEE80211_OFFLOAD_ENCAP_ENABLED; 803 } 804 805 if (sdata->vif.offload_flags == flags) 806 return false; 807 808 sdata->vif.offload_flags = flags; 809 return true; 810} 811 812static void ieee80211_set_vif_encap_ops(struct ieee80211_sub_if_data *sdata) 813{ 814 struct ieee80211_local *local = sdata->local; 815 struct ieee80211_sub_if_data *bss = sdata; 816 bool enabled; 817 818 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) { 819 if (!sdata->bss) 820 return; 821 822 bss = container_of(sdata->bss, struct ieee80211_sub_if_data, u.ap); 823 } 824 825 if (!ieee80211_hw_check(&local->hw, SUPPORTS_TX_ENCAP_OFFLOAD) || 826 !ieee80211_iftype_supports_encap_offload(bss->vif.type)) 827 return; 828 829 enabled = bss->vif.offload_flags & IEEE80211_OFFLOAD_ENCAP_ENABLED; 830 if (sdata->wdev.use_4addr && 831 !(bss->vif.offload_flags & IEEE80211_OFFLOAD_ENCAP_4ADDR)) 832 enabled = false; 833 834 sdata->dev->netdev_ops = enabled ? &ieee80211_dataif_8023_ops : 835 &ieee80211_dataif_ops; 836} 837 838static void ieee80211_recalc_sdata_offload(struct ieee80211_sub_if_data *sdata) 839{ 840 struct ieee80211_local *local = sdata->local; 841 struct ieee80211_sub_if_data *vsdata; 842 843 if (ieee80211_set_sdata_offload_flags(sdata)) { 844 drv_update_vif_offload(local, sdata); 845 ieee80211_set_vif_encap_ops(sdata); 846 } 847 848 list_for_each_entry(vsdata, &local->interfaces, list) { 849 if (vsdata->vif.type != NL80211_IFTYPE_AP_VLAN || 850 vsdata->bss != &sdata->u.ap) 851 continue; 852 853 ieee80211_set_vif_encap_ops(vsdata); 854 } 855} 856 857void ieee80211_recalc_offload(struct ieee80211_local *local) 858{ 859 struct ieee80211_sub_if_data *sdata; 860 861 if (!ieee80211_hw_check(&local->hw, SUPPORTS_TX_ENCAP_OFFLOAD)) 862 return; 863 864 mutex_lock(&local->iflist_mtx); 865 866 list_for_each_entry(sdata, &local->interfaces, list) { 867 if (!ieee80211_sdata_running(sdata)) 868 continue; 869 870 ieee80211_recalc_sdata_offload(sdata); 871 } 872 873 mutex_unlock(&local->iflist_mtx); 874} 875 876void ieee80211_adjust_monitor_flags(struct ieee80211_sub_if_data *sdata, 877 const int offset) 878{ 879 struct ieee80211_local *local = sdata->local; 880 u32 flags = sdata->u.mntr.flags; 881 882#define ADJUST(_f, _s) do { \ 883 if (flags & MONITOR_FLAG_##_f) \ 884 local->fif_##_s += offset; \ 885 } while (0) 886 887 ADJUST(FCSFAIL, fcsfail); 888 ADJUST(PLCPFAIL, plcpfail); 889 ADJUST(CONTROL, control); 890 ADJUST(CONTROL, pspoll); 891 ADJUST(OTHER_BSS, other_bss); 892 893#undef ADJUST 894} 895 896static void ieee80211_set_default_queues(struct ieee80211_sub_if_data *sdata) 897{ 898 struct ieee80211_local *local = sdata->local; 899 int i; 900 901 for (i = 0; i < IEEE80211_NUM_ACS; i++) { 902 if (ieee80211_hw_check(&local->hw, QUEUE_CONTROL)) 903 sdata->vif.hw_queue[i] = IEEE80211_INVAL_HW_QUEUE; 904 else if (local->hw.queues >= IEEE80211_NUM_ACS) 905 sdata->vif.hw_queue[i] = i; 906 else 907 sdata->vif.hw_queue[i] = 0; 908 } 909 sdata->vif.cab_queue = IEEE80211_INVAL_HW_QUEUE; 910} 911 912int ieee80211_add_virtual_monitor(struct ieee80211_local *local) 913{ 914 struct ieee80211_sub_if_data *sdata; 915 int ret; 916 917 if (!ieee80211_hw_check(&local->hw, WANT_MONITOR_VIF)) 918 return 0; 919 920 ASSERT_RTNL(); 921 922 if (local->monitor_sdata) 923 return 0; 924 925 sdata = kzalloc(sizeof(*sdata) + local->hw.vif_data_size, GFP_KERNEL); 926 if (!sdata) 927 return -ENOMEM; 928 929 /* set up data */ 930 sdata->local = local; 931 sdata->vif.type = NL80211_IFTYPE_MONITOR; 932 snprintf(sdata->name, IFNAMSIZ, "%s-monitor", 933 wiphy_name(local->hw.wiphy)); 934 sdata->wdev.iftype = NL80211_IFTYPE_MONITOR; 935 936 sdata->encrypt_headroom = IEEE80211_ENCRYPT_HEADROOM; 937 938 ieee80211_set_default_queues(sdata); 939 940 ret = drv_add_interface(local, sdata); 941 if (WARN_ON(ret)) { 942 /* ok .. stupid driver, it asked for this! */ 943 kfree(sdata); 944 return ret; 945 } 946 947 set_bit(SDATA_STATE_RUNNING, &sdata->state); 948 949 ret = ieee80211_check_queues(sdata, NL80211_IFTYPE_MONITOR); 950 if (ret) { 951 kfree(sdata); 952 return ret; 953 } 954 955 mutex_lock(&local->iflist_mtx); 956 rcu_assign_pointer(local->monitor_sdata, sdata); 957 mutex_unlock(&local->iflist_mtx); 958 959 mutex_lock(&local->mtx); 960 ret = ieee80211_vif_use_channel(sdata, &local->monitor_chandef, 961 IEEE80211_CHANCTX_EXCLUSIVE); 962 mutex_unlock(&local->mtx); 963 if (ret) { 964 mutex_lock(&local->iflist_mtx); 965 RCU_INIT_POINTER(local->monitor_sdata, NULL); 966 mutex_unlock(&local->iflist_mtx); 967 synchronize_net(); 968 drv_remove_interface(local, sdata); 969 kfree(sdata); 970 return ret; 971 } 972 973 skb_queue_head_init(&sdata->skb_queue); 974 INIT_WORK(&sdata->work, ieee80211_iface_work); 975 976 return 0; 977} 978 979void ieee80211_del_virtual_monitor(struct ieee80211_local *local) 980{ 981 struct ieee80211_sub_if_data *sdata; 982 983 if (!ieee80211_hw_check(&local->hw, WANT_MONITOR_VIF)) 984 return; 985 986 ASSERT_RTNL(); 987 988 mutex_lock(&local->iflist_mtx); 989 990 sdata = rcu_dereference_protected(local->monitor_sdata, 991 lockdep_is_held(&local->iflist_mtx)); 992 if (!sdata) { 993 mutex_unlock(&local->iflist_mtx); 994 return; 995 } 996 997 RCU_INIT_POINTER(local->monitor_sdata, NULL); 998 mutex_unlock(&local->iflist_mtx); 999 1000 synchronize_net(); 1001 1002 mutex_lock(&local->mtx); 1003 ieee80211_vif_release_channel(sdata); 1004 mutex_unlock(&local->mtx); 1005 1006 drv_remove_interface(local, sdata); 1007 1008 kfree(sdata); 1009} 1010 1011/* 1012 * NOTE: Be very careful when changing this function, it must NOT return 1013 * an error on interface type changes that have been pre-checked, so most 1014 * checks should be in ieee80211_check_concurrent_iface. 1015 */ 1016int ieee80211_do_open(struct wireless_dev *wdev, bool coming_up) 1017{ 1018 struct ieee80211_sub_if_data *sdata = IEEE80211_WDEV_TO_SUB_IF(wdev); 1019 struct net_device *dev = wdev->netdev; 1020 struct ieee80211_local *local = sdata->local; 1021 struct sta_info *sta; 1022 u32 changed = 0; 1023 int res; 1024 u32 hw_reconf_flags = 0; 1025 1026 switch (sdata->vif.type) { 1027 case NL80211_IFTYPE_WDS: 1028 if (!is_valid_ether_addr(sdata->u.wds.remote_addr)) 1029 return -ENOLINK; 1030 break; 1031 case NL80211_IFTYPE_AP_VLAN: { 1032 struct ieee80211_sub_if_data *master; 1033 1034 if (!sdata->bss) 1035 return -ENOLINK; 1036 1037 mutex_lock(&local->mtx); 1038 list_add(&sdata->u.vlan.list, &sdata->bss->vlans); 1039 mutex_unlock(&local->mtx); 1040 1041 master = container_of(sdata->bss, 1042 struct ieee80211_sub_if_data, u.ap); 1043 sdata->control_port_protocol = 1044 master->control_port_protocol; 1045 sdata->control_port_no_encrypt = 1046 master->control_port_no_encrypt; 1047 sdata->control_port_over_nl80211 = 1048 master->control_port_over_nl80211; 1049 sdata->control_port_no_preauth = 1050 master->control_port_no_preauth; 1051 sdata->vif.cab_queue = master->vif.cab_queue; 1052 memcpy(sdata->vif.hw_queue, master->vif.hw_queue, 1053 sizeof(sdata->vif.hw_queue)); 1054 sdata->vif.bss_conf.chandef = master->vif.bss_conf.chandef; 1055 1056 mutex_lock(&local->key_mtx); 1057 sdata->crypto_tx_tailroom_needed_cnt += 1058 master->crypto_tx_tailroom_needed_cnt; 1059 mutex_unlock(&local->key_mtx); 1060 1061 break; 1062 } 1063 case NL80211_IFTYPE_AP: 1064 sdata->bss = &sdata->u.ap; 1065 break; 1066 case NL80211_IFTYPE_MESH_POINT: 1067 case NL80211_IFTYPE_STATION: 1068 case NL80211_IFTYPE_MONITOR: 1069 case NL80211_IFTYPE_ADHOC: 1070 case NL80211_IFTYPE_P2P_DEVICE: 1071 case NL80211_IFTYPE_OCB: 1072 case NL80211_IFTYPE_NAN: 1073 /* no special treatment */ 1074 break; 1075 case NL80211_IFTYPE_UNSPECIFIED: 1076 case NUM_NL80211_IFTYPES: 1077 case NL80211_IFTYPE_P2P_CLIENT: 1078 case NL80211_IFTYPE_P2P_GO: 1079 /* cannot happen */ 1080 WARN_ON(1); 1081 break; 1082 } 1083 1084 if (local->open_count == 0) { 1085 res = drv_start(local); 1086 if (res) 1087 goto err_del_bss; 1088 /* we're brought up, everything changes */ 1089 hw_reconf_flags = ~0; 1090 ieee80211_led_radio(local, true); 1091 ieee80211_mod_tpt_led_trig(local, 1092 IEEE80211_TPT_LEDTRIG_FL_RADIO, 0); 1093 } 1094 1095 /* 1096 * Copy the hopefully now-present MAC address to 1097 * this interface, if it has the special null one. 1098 */ 1099 if (dev && is_zero_ether_addr(dev->dev_addr)) { 1100 memcpy(dev->dev_addr, 1101 local->hw.wiphy->perm_addr, 1102 ETH_ALEN); 1103 memcpy(dev->perm_addr, dev->dev_addr, ETH_ALEN); 1104 1105 if (!is_valid_ether_addr(dev->dev_addr)) { 1106 res = -EADDRNOTAVAIL; 1107 goto err_stop; 1108 } 1109 } 1110 1111 switch (sdata->vif.type) { 1112 case NL80211_IFTYPE_AP_VLAN: 1113 /* no need to tell driver, but set carrier and chanctx */ 1114 if (rtnl_dereference(sdata->bss->beacon)) { 1115 ieee80211_vif_vlan_copy_chanctx(sdata); 1116 netif_carrier_on(dev); 1117 ieee80211_set_vif_encap_ops(sdata); 1118 } else { 1119 netif_carrier_off(dev); 1120 } 1121 break; 1122 case NL80211_IFTYPE_MONITOR: 1123 if (sdata->u.mntr.flags & MONITOR_FLAG_COOK_FRAMES) { 1124 local->cooked_mntrs++; 1125 break; 1126 } 1127 1128 if (sdata->u.mntr.flags & MONITOR_FLAG_ACTIVE) { 1129 res = drv_add_interface(local, sdata); 1130 if (res) 1131 goto err_stop; 1132 } else if (local->monitors == 0 && local->open_count == 0) { 1133 res = ieee80211_add_virtual_monitor(local); 1134 if (res) 1135 goto err_stop; 1136 } 1137 1138 /* must be before the call to ieee80211_configure_filter */ 1139 local->monitors++; 1140 if (local->monitors == 1) { 1141 local->hw.conf.flags |= IEEE80211_CONF_MONITOR; 1142 hw_reconf_flags |= IEEE80211_CONF_CHANGE_MONITOR; 1143 } 1144 1145 ieee80211_adjust_monitor_flags(sdata, 1); 1146 ieee80211_configure_filter(local); 1147 ieee80211_recalc_offload(local); 1148 mutex_lock(&local->mtx); 1149 ieee80211_recalc_idle(local); 1150 mutex_unlock(&local->mtx); 1151 1152 netif_carrier_on(dev); 1153 break; 1154 default: 1155 if (coming_up) { 1156 ieee80211_del_virtual_monitor(local); 1157 ieee80211_set_sdata_offload_flags(sdata); 1158 1159 res = drv_add_interface(local, sdata); 1160 if (res) 1161 goto err_stop; 1162 1163 ieee80211_set_vif_encap_ops(sdata); 1164 res = ieee80211_check_queues(sdata, 1165 ieee80211_vif_type_p2p(&sdata->vif)); 1166 if (res) 1167 goto err_del_interface; 1168 } 1169 1170 if (sdata->vif.type == NL80211_IFTYPE_AP) { 1171 local->fif_pspoll++; 1172 local->fif_probe_req++; 1173 1174 ieee80211_configure_filter(local); 1175 } else if (sdata->vif.type == NL80211_IFTYPE_ADHOC) { 1176 local->fif_probe_req++; 1177 } 1178 1179 if (sdata->vif.probe_req_reg) 1180 drv_config_iface_filter(local, sdata, 1181 FIF_PROBE_REQ, 1182 FIF_PROBE_REQ); 1183 1184 if (sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE && 1185 sdata->vif.type != NL80211_IFTYPE_NAN) 1186 changed |= ieee80211_reset_erp_info(sdata); 1187 ieee80211_bss_info_change_notify(sdata, changed); 1188 1189 switch (sdata->vif.type) { 1190 case NL80211_IFTYPE_STATION: 1191 case NL80211_IFTYPE_ADHOC: 1192 case NL80211_IFTYPE_AP: 1193 case NL80211_IFTYPE_MESH_POINT: 1194 case NL80211_IFTYPE_OCB: 1195 netif_carrier_off(dev); 1196 break; 1197 case NL80211_IFTYPE_WDS: 1198 case NL80211_IFTYPE_P2P_DEVICE: 1199 case NL80211_IFTYPE_NAN: 1200 break; 1201 default: 1202 /* not reached */ 1203 WARN_ON(1); 1204 } 1205 1206 /* 1207 * Set default queue parameters so drivers don't 1208 * need to initialise the hardware if the hardware 1209 * doesn't start up with sane defaults. 1210 * Enable QoS for anything but station interfaces. 1211 */ 1212 ieee80211_set_wmm_default(sdata, true, 1213 sdata->vif.type != NL80211_IFTYPE_STATION); 1214 } 1215 1216 set_bit(SDATA_STATE_RUNNING, &sdata->state); 1217 1218 switch (sdata->vif.type) { 1219 case NL80211_IFTYPE_WDS: 1220 /* Create STA entry for the WDS peer */ 1221 sta = sta_info_alloc(sdata, sdata->u.wds.remote_addr, 1222 GFP_KERNEL); 1223 if (!sta) { 1224 res = -ENOMEM; 1225 goto err_del_interface; 1226 } 1227 1228 sta_info_pre_move_state(sta, IEEE80211_STA_AUTH); 1229 sta_info_pre_move_state(sta, IEEE80211_STA_ASSOC); 1230 sta_info_pre_move_state(sta, IEEE80211_STA_AUTHORIZED); 1231 1232 res = sta_info_insert(sta); 1233 if (res) { 1234 /* STA has been freed */ 1235 goto err_del_interface; 1236 } 1237 1238 rate_control_rate_init(sta); 1239 netif_carrier_on(dev); 1240 break; 1241 case NL80211_IFTYPE_P2P_DEVICE: 1242 rcu_assign_pointer(local->p2p_sdata, sdata); 1243 break; 1244 case NL80211_IFTYPE_MONITOR: 1245 if (sdata->u.mntr.flags & MONITOR_FLAG_COOK_FRAMES) 1246 break; 1247 list_add_tail_rcu(&sdata->u.mntr.list, &local->mon_list); 1248 break; 1249 default: 1250 break; 1251 } 1252 1253 /* 1254 * set_multicast_list will be invoked by the networking core 1255 * which will check whether any increments here were done in 1256 * error and sync them down to the hardware as filter flags. 1257 */ 1258 if (sdata->flags & IEEE80211_SDATA_ALLMULTI) 1259 atomic_inc(&local->iff_allmultis); 1260 1261 if (coming_up) 1262 local->open_count++; 1263 1264 if (hw_reconf_flags) 1265 ieee80211_hw_config(local, hw_reconf_flags); 1266 1267 ieee80211_recalc_ps(local); 1268 1269 if (sdata->vif.type == NL80211_IFTYPE_MONITOR || 1270 sdata->vif.type == NL80211_IFTYPE_AP_VLAN || 1271 local->ops->wake_tx_queue) { 1272 /* XXX: for AP_VLAN, actually track AP queues */ 1273 if (dev) 1274 netif_tx_start_all_queues(dev); 1275 } else if (dev) { 1276 unsigned long flags; 1277 int n_acs = IEEE80211_NUM_ACS; 1278 int ac; 1279 1280 if (local->hw.queues < IEEE80211_NUM_ACS) 1281 n_acs = 1; 1282 1283 spin_lock_irqsave(&local->queue_stop_reason_lock, flags); 1284 if (sdata->vif.cab_queue == IEEE80211_INVAL_HW_QUEUE || 1285 (local->queue_stop_reasons[sdata->vif.cab_queue] == 0 && 1286 skb_queue_empty(&local->pending[sdata->vif.cab_queue]))) { 1287 for (ac = 0; ac < n_acs; ac++) { 1288 int ac_queue = sdata->vif.hw_queue[ac]; 1289 1290 if (local->queue_stop_reasons[ac_queue] == 0 && 1291 skb_queue_empty(&local->pending[ac_queue])) 1292 netif_start_subqueue(dev, ac); 1293 } 1294 } 1295 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); 1296 } 1297 1298 return 0; 1299 err_del_interface: 1300 drv_remove_interface(local, sdata); 1301 err_stop: 1302 if (!local->open_count) 1303 drv_stop(local); 1304 err_del_bss: 1305 sdata->bss = NULL; 1306 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) { 1307 mutex_lock(&local->mtx); 1308 list_del(&sdata->u.vlan.list); 1309 mutex_unlock(&local->mtx); 1310 } 1311 /* might already be clear but that doesn't matter */ 1312 clear_bit(SDATA_STATE_RUNNING, &sdata->state); 1313 return res; 1314} 1315 1316static void ieee80211_if_free(struct net_device *dev) 1317{ 1318 free_percpu(dev->tstats); 1319} 1320 1321static void ieee80211_if_setup(struct net_device *dev) 1322{ 1323 ether_setup(dev); 1324 dev->priv_flags &= ~IFF_TX_SKB_SHARING; 1325 dev->netdev_ops = &ieee80211_dataif_ops; 1326 dev->needs_free_netdev = true; 1327 dev->priv_destructor = ieee80211_if_free; 1328} 1329 1330static void ieee80211_if_setup_no_queue(struct net_device *dev) 1331{ 1332 ieee80211_if_setup(dev); 1333 dev->priv_flags |= IFF_NO_QUEUE; 1334} 1335 1336static void ieee80211_iface_work(struct work_struct *work) 1337{ 1338 struct ieee80211_sub_if_data *sdata = 1339 container_of(work, struct ieee80211_sub_if_data, work); 1340 struct ieee80211_local *local = sdata->local; 1341 struct sk_buff *skb; 1342 struct sta_info *sta; 1343 1344 if (!ieee80211_sdata_running(sdata)) 1345 return; 1346 1347 if (test_bit(SCAN_SW_SCANNING, &local->scanning)) 1348 return; 1349 1350 if (!ieee80211_can_run_worker(local)) 1351 return; 1352 1353 /* first process frames */ 1354 while ((skb = skb_dequeue(&sdata->skb_queue))) { 1355 struct ieee80211_mgmt *mgmt = (void *)skb->data; 1356 1357 if (ieee80211_is_action(mgmt->frame_control) && 1358 mgmt->u.action.category == WLAN_CATEGORY_BACK) { 1359 int len = skb->len; 1360 1361 mutex_lock(&local->sta_mtx); 1362 sta = sta_info_get_bss(sdata, mgmt->sa); 1363 if (sta) { 1364 switch (mgmt->u.action.u.addba_req.action_code) { 1365 case WLAN_ACTION_ADDBA_REQ: 1366 ieee80211_process_addba_request( 1367 local, sta, mgmt, len); 1368 break; 1369 case WLAN_ACTION_ADDBA_RESP: 1370 ieee80211_process_addba_resp(local, sta, 1371 mgmt, len); 1372 break; 1373 case WLAN_ACTION_DELBA: 1374 ieee80211_process_delba(sdata, sta, 1375 mgmt, len); 1376 break; 1377 default: 1378 WARN_ON(1); 1379 break; 1380 } 1381 } 1382 mutex_unlock(&local->sta_mtx); 1383 } else if (ieee80211_is_action(mgmt->frame_control) && 1384 mgmt->u.action.category == WLAN_CATEGORY_VHT) { 1385 switch (mgmt->u.action.u.vht_group_notif.action_code) { 1386 case WLAN_VHT_ACTION_OPMODE_NOTIF: { 1387 struct ieee80211_rx_status *status; 1388 enum nl80211_band band; 1389 u8 opmode; 1390 1391 status = IEEE80211_SKB_RXCB(skb); 1392 band = status->band; 1393 opmode = mgmt->u.action.u.vht_opmode_notif.operating_mode; 1394 1395 mutex_lock(&local->sta_mtx); 1396 sta = sta_info_get_bss(sdata, mgmt->sa); 1397 1398 if (sta) 1399 ieee80211_vht_handle_opmode(sdata, sta, 1400 opmode, 1401 band); 1402 1403 mutex_unlock(&local->sta_mtx); 1404 break; 1405 } 1406 case WLAN_VHT_ACTION_GROUPID_MGMT: 1407 ieee80211_process_mu_groups(sdata, mgmt); 1408 break; 1409 default: 1410 WARN_ON(1); 1411 break; 1412 } 1413 } else if (ieee80211_is_ext(mgmt->frame_control)) { 1414 if (sdata->vif.type == NL80211_IFTYPE_STATION) 1415 ieee80211_sta_rx_queued_ext(sdata, skb); 1416 else 1417 WARN_ON(1); 1418 } else if (ieee80211_is_data_qos(mgmt->frame_control)) { 1419 struct ieee80211_hdr *hdr = (void *)mgmt; 1420 /* 1421 * So the frame isn't mgmt, but frame_control 1422 * is at the right place anyway, of course, so 1423 * the if statement is correct. 1424 * 1425 * Warn if we have other data frame types here, 1426 * they must not get here. 1427 */ 1428 WARN_ON(hdr->frame_control & 1429 cpu_to_le16(IEEE80211_STYPE_NULLFUNC)); 1430 WARN_ON(!(hdr->seq_ctrl & 1431 cpu_to_le16(IEEE80211_SCTL_FRAG))); 1432 /* 1433 * This was a fragment of a frame, received while 1434 * a block-ack session was active. That cannot be 1435 * right, so terminate the session. 1436 */ 1437 mutex_lock(&local->sta_mtx); 1438 sta = sta_info_get_bss(sdata, mgmt->sa); 1439 if (sta) { 1440 u16 tid = ieee80211_get_tid(hdr); 1441 1442 __ieee80211_stop_rx_ba_session( 1443 sta, tid, WLAN_BACK_RECIPIENT, 1444 WLAN_REASON_QSTA_REQUIRE_SETUP, 1445 true); 1446 } 1447 mutex_unlock(&local->sta_mtx); 1448 } else switch (sdata->vif.type) { 1449 case NL80211_IFTYPE_STATION: 1450 ieee80211_sta_rx_queued_mgmt(sdata, skb); 1451 break; 1452 case NL80211_IFTYPE_ADHOC: 1453 ieee80211_ibss_rx_queued_mgmt(sdata, skb); 1454 break; 1455 case NL80211_IFTYPE_MESH_POINT: 1456 if (!ieee80211_vif_is_mesh(&sdata->vif)) 1457 break; 1458 ieee80211_mesh_rx_queued_mgmt(sdata, skb); 1459 break; 1460 default: 1461 WARN(1, "frame for unexpected interface type"); 1462 break; 1463 } 1464 1465 kfree_skb(skb); 1466 } 1467 1468 /* then other type-dependent work */ 1469 switch (sdata->vif.type) { 1470 case NL80211_IFTYPE_STATION: 1471 ieee80211_sta_work(sdata); 1472 break; 1473 case NL80211_IFTYPE_ADHOC: 1474 ieee80211_ibss_work(sdata); 1475 break; 1476 case NL80211_IFTYPE_MESH_POINT: 1477 if (!ieee80211_vif_is_mesh(&sdata->vif)) 1478 break; 1479 ieee80211_mesh_work(sdata); 1480 break; 1481 case NL80211_IFTYPE_OCB: 1482 ieee80211_ocb_work(sdata); 1483 break; 1484 default: 1485 break; 1486 } 1487} 1488 1489static void ieee80211_recalc_smps_work(struct work_struct *work) 1490{ 1491 struct ieee80211_sub_if_data *sdata = 1492 container_of(work, struct ieee80211_sub_if_data, recalc_smps); 1493 1494 ieee80211_recalc_smps(sdata); 1495} 1496 1497/* 1498 * Helper function to initialise an interface to a specific type. 1499 */ 1500static void ieee80211_setup_sdata(struct ieee80211_sub_if_data *sdata, 1501 enum nl80211_iftype type) 1502{ 1503 static const u8 bssid_wildcard[ETH_ALEN] = {0xff, 0xff, 0xff, 1504 0xff, 0xff, 0xff}; 1505 1506 /* clear type-dependent union */ 1507 memset(&sdata->u, 0, sizeof(sdata->u)); 1508 1509 /* and set some type-dependent values */ 1510 sdata->vif.type = type; 1511 sdata->vif.p2p = false; 1512 sdata->wdev.iftype = type; 1513 1514 sdata->control_port_protocol = cpu_to_be16(ETH_P_PAE); 1515 sdata->control_port_no_encrypt = false; 1516 sdata->control_port_over_nl80211 = false; 1517 sdata->control_port_no_preauth = false; 1518 sdata->encrypt_headroom = IEEE80211_ENCRYPT_HEADROOM; 1519 sdata->vif.bss_conf.idle = true; 1520 sdata->vif.bss_conf.txpower = INT_MIN; /* unset */ 1521 1522 sdata->noack_map = 0; 1523 1524 /* only monitor/p2p-device differ */ 1525 if (sdata->dev) { 1526 sdata->dev->netdev_ops = &ieee80211_dataif_ops; 1527 sdata->dev->type = ARPHRD_ETHER; 1528 } 1529 1530 skb_queue_head_init(&sdata->skb_queue); 1531 INIT_WORK(&sdata->work, ieee80211_iface_work); 1532 INIT_WORK(&sdata->recalc_smps, ieee80211_recalc_smps_work); 1533 INIT_WORK(&sdata->csa_finalize_work, ieee80211_csa_finalize_work); 1534 INIT_LIST_HEAD(&sdata->assigned_chanctx_list); 1535 INIT_LIST_HEAD(&sdata->reserved_chanctx_list); 1536 1537 switch (type) { 1538 case NL80211_IFTYPE_P2P_GO: 1539 type = NL80211_IFTYPE_AP; 1540 sdata->vif.type = type; 1541 sdata->vif.p2p = true; 1542 fallthrough; 1543 case NL80211_IFTYPE_AP: 1544 skb_queue_head_init(&sdata->u.ap.ps.bc_buf); 1545 INIT_LIST_HEAD(&sdata->u.ap.vlans); 1546 sdata->vif.bss_conf.bssid = sdata->vif.addr; 1547 break; 1548 case NL80211_IFTYPE_P2P_CLIENT: 1549 type = NL80211_IFTYPE_STATION; 1550 sdata->vif.type = type; 1551 sdata->vif.p2p = true; 1552 fallthrough; 1553 case NL80211_IFTYPE_STATION: 1554 sdata->vif.bss_conf.bssid = sdata->u.mgd.bssid; 1555 ieee80211_sta_setup_sdata(sdata); 1556 break; 1557 case NL80211_IFTYPE_OCB: 1558 sdata->vif.bss_conf.bssid = bssid_wildcard; 1559 ieee80211_ocb_setup_sdata(sdata); 1560 break; 1561 case NL80211_IFTYPE_ADHOC: 1562 sdata->vif.bss_conf.bssid = sdata->u.ibss.bssid; 1563 ieee80211_ibss_setup_sdata(sdata); 1564 break; 1565 case NL80211_IFTYPE_MESH_POINT: 1566 if (ieee80211_vif_is_mesh(&sdata->vif)) 1567 ieee80211_mesh_init_sdata(sdata); 1568 break; 1569 case NL80211_IFTYPE_MONITOR: 1570 sdata->dev->type = ARPHRD_IEEE80211_RADIOTAP; 1571 sdata->dev->netdev_ops = &ieee80211_monitorif_ops; 1572 sdata->u.mntr.flags = MONITOR_FLAG_CONTROL | 1573 MONITOR_FLAG_OTHER_BSS; 1574 break; 1575 case NL80211_IFTYPE_WDS: 1576 sdata->vif.bss_conf.bssid = NULL; 1577 break; 1578 case NL80211_IFTYPE_NAN: 1579 idr_init(&sdata->u.nan.function_inst_ids); 1580 spin_lock_init(&sdata->u.nan.func_lock); 1581 sdata->vif.bss_conf.bssid = sdata->vif.addr; 1582 break; 1583 case NL80211_IFTYPE_AP_VLAN: 1584 case NL80211_IFTYPE_P2P_DEVICE: 1585 sdata->vif.bss_conf.bssid = sdata->vif.addr; 1586 break; 1587 case NL80211_IFTYPE_UNSPECIFIED: 1588 case NUM_NL80211_IFTYPES: 1589 WARN_ON(1); 1590 break; 1591 } 1592 1593 ieee80211_debugfs_add_netdev(sdata); 1594} 1595 1596static int ieee80211_runtime_change_iftype(struct ieee80211_sub_if_data *sdata, 1597 enum nl80211_iftype type) 1598{ 1599 struct ieee80211_local *local = sdata->local; 1600 int ret, err; 1601 enum nl80211_iftype internal_type = type; 1602 bool p2p = false; 1603 1604 ASSERT_RTNL(); 1605 1606 if (!local->ops->change_interface) 1607 return -EBUSY; 1608 1609 switch (sdata->vif.type) { 1610 case NL80211_IFTYPE_AP: 1611 case NL80211_IFTYPE_STATION: 1612 case NL80211_IFTYPE_ADHOC: 1613 case NL80211_IFTYPE_OCB: 1614 /* 1615 * Could maybe also all others here? 1616 * Just not sure how that interacts 1617 * with the RX/config path e.g. for 1618 * mesh. 1619 */ 1620 break; 1621 default: 1622 return -EBUSY; 1623 } 1624 1625 switch (type) { 1626 case NL80211_IFTYPE_AP: 1627 case NL80211_IFTYPE_STATION: 1628 case NL80211_IFTYPE_ADHOC: 1629 case NL80211_IFTYPE_OCB: 1630 /* 1631 * Could probably support everything 1632 * but WDS here (WDS do_open can fail 1633 * under memory pressure, which this 1634 * code isn't prepared to handle). 1635 */ 1636 break; 1637 case NL80211_IFTYPE_P2P_CLIENT: 1638 p2p = true; 1639 internal_type = NL80211_IFTYPE_STATION; 1640 break; 1641 case NL80211_IFTYPE_P2P_GO: 1642 p2p = true; 1643 internal_type = NL80211_IFTYPE_AP; 1644 break; 1645 default: 1646 return -EBUSY; 1647 } 1648 1649 ret = ieee80211_check_concurrent_iface(sdata, internal_type); 1650 if (ret) 1651 return ret; 1652 1653 ieee80211_stop_vif_queues(local, sdata, 1654 IEEE80211_QUEUE_STOP_REASON_IFTYPE_CHANGE); 1655 synchronize_net(); 1656 1657 ieee80211_do_stop(sdata, false); 1658 1659 ieee80211_teardown_sdata(sdata); 1660 1661 ieee80211_set_sdata_offload_flags(sdata); 1662 ret = drv_change_interface(local, sdata, internal_type, p2p); 1663 if (ret) 1664 type = ieee80211_vif_type_p2p(&sdata->vif); 1665 1666 /* 1667 * Ignore return value here, there's not much we can do since 1668 * the driver changed the interface type internally already. 1669 * The warnings will hopefully make driver authors fix it :-) 1670 */ 1671 ieee80211_check_queues(sdata, type); 1672 1673 ieee80211_setup_sdata(sdata, type); 1674 ieee80211_set_vif_encap_ops(sdata); 1675 1676 err = ieee80211_do_open(&sdata->wdev, false); 1677 WARN(err, "type change: do_open returned %d", err); 1678 1679 ieee80211_wake_vif_queues(local, sdata, 1680 IEEE80211_QUEUE_STOP_REASON_IFTYPE_CHANGE); 1681 return ret; 1682} 1683 1684int ieee80211_if_change_type(struct ieee80211_sub_if_data *sdata, 1685 enum nl80211_iftype type) 1686{ 1687 int ret; 1688 1689 ASSERT_RTNL(); 1690 1691 if (type == ieee80211_vif_type_p2p(&sdata->vif)) 1692 return 0; 1693 1694 if (ieee80211_sdata_running(sdata)) { 1695 ret = ieee80211_runtime_change_iftype(sdata, type); 1696 if (ret) 1697 return ret; 1698 } else { 1699 /* Purge and reset type-dependent state. */ 1700 ieee80211_teardown_sdata(sdata); 1701 ieee80211_setup_sdata(sdata, type); 1702 } 1703 1704 /* reset some values that shouldn't be kept across type changes */ 1705 if (type == NL80211_IFTYPE_STATION) 1706 sdata->u.mgd.use_4addr = false; 1707 1708 return 0; 1709} 1710 1711static void ieee80211_assign_perm_addr(struct ieee80211_local *local, 1712 u8 *perm_addr, enum nl80211_iftype type) 1713{ 1714 struct ieee80211_sub_if_data *sdata; 1715 u64 mask, start, addr, val, inc; 1716 u8 *m; 1717 u8 tmp_addr[ETH_ALEN]; 1718 int i; 1719 1720 /* default ... something at least */ 1721 memcpy(perm_addr, local->hw.wiphy->perm_addr, ETH_ALEN); 1722 1723 if (is_zero_ether_addr(local->hw.wiphy->addr_mask) && 1724 local->hw.wiphy->n_addresses <= 1) 1725 return; 1726 1727 mutex_lock(&local->iflist_mtx); 1728 1729 switch (type) { 1730 case NL80211_IFTYPE_MONITOR: 1731 /* doesn't matter */ 1732 break; 1733 case NL80211_IFTYPE_WDS: 1734 case NL80211_IFTYPE_AP_VLAN: 1735 /* match up with an AP interface */ 1736 list_for_each_entry(sdata, &local->interfaces, list) { 1737 if (sdata->vif.type != NL80211_IFTYPE_AP) 1738 continue; 1739 memcpy(perm_addr, sdata->vif.addr, ETH_ALEN); 1740 break; 1741 } 1742 /* keep default if no AP interface present */ 1743 break; 1744 case NL80211_IFTYPE_P2P_CLIENT: 1745 case NL80211_IFTYPE_P2P_GO: 1746 if (ieee80211_hw_check(&local->hw, P2P_DEV_ADDR_FOR_INTF)) { 1747 list_for_each_entry(sdata, &local->interfaces, list) { 1748 if (sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE) 1749 continue; 1750 if (!ieee80211_sdata_running(sdata)) 1751 continue; 1752 memcpy(perm_addr, sdata->vif.addr, ETH_ALEN); 1753 goto out_unlock; 1754 } 1755 } 1756 fallthrough; 1757 default: 1758 /* assign a new address if possible -- try n_addresses first */ 1759 for (i = 0; i < local->hw.wiphy->n_addresses; i++) { 1760 bool used = false; 1761 1762 list_for_each_entry(sdata, &local->interfaces, list) { 1763 if (ether_addr_equal(local->hw.wiphy->addresses[i].addr, 1764 sdata->vif.addr)) { 1765 used = true; 1766 break; 1767 } 1768 } 1769 1770 if (!used) { 1771 memcpy(perm_addr, 1772 local->hw.wiphy->addresses[i].addr, 1773 ETH_ALEN); 1774 break; 1775 } 1776 } 1777 1778 /* try mask if available */ 1779 if (is_zero_ether_addr(local->hw.wiphy->addr_mask)) 1780 break; 1781 1782 m = local->hw.wiphy->addr_mask; 1783 mask = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) | 1784 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) | 1785 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8); 1786 1787 if (__ffs64(mask) + hweight64(mask) != fls64(mask)) { 1788 /* not a contiguous mask ... not handled now! */ 1789 pr_info("not contiguous\n"); 1790 break; 1791 } 1792 1793 /* 1794 * Pick address of existing interface in case user changed 1795 * MAC address manually, default to perm_addr. 1796 */ 1797 m = local->hw.wiphy->perm_addr; 1798 list_for_each_entry(sdata, &local->interfaces, list) { 1799 if (sdata->vif.type == NL80211_IFTYPE_MONITOR) 1800 continue; 1801 m = sdata->vif.addr; 1802 break; 1803 } 1804 start = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) | 1805 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) | 1806 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8); 1807 1808 inc = 1ULL<<__ffs64(mask); 1809 val = (start & mask); 1810 addr = (start & ~mask) | (val & mask); 1811 do { 1812 bool used = false; 1813 1814 tmp_addr[5] = addr >> 0*8; 1815 tmp_addr[4] = addr >> 1*8; 1816 tmp_addr[3] = addr >> 2*8; 1817 tmp_addr[2] = addr >> 3*8; 1818 tmp_addr[1] = addr >> 4*8; 1819 tmp_addr[0] = addr >> 5*8; 1820 1821 val += inc; 1822 1823 list_for_each_entry(sdata, &local->interfaces, list) { 1824 if (ether_addr_equal(tmp_addr, sdata->vif.addr)) { 1825 used = true; 1826 break; 1827 } 1828 } 1829 1830 if (!used) { 1831 memcpy(perm_addr, tmp_addr, ETH_ALEN); 1832 break; 1833 } 1834 addr = (start & ~mask) | (val & mask); 1835 } while (addr != start); 1836 1837 break; 1838 } 1839 1840 out_unlock: 1841 mutex_unlock(&local->iflist_mtx); 1842} 1843 1844int ieee80211_if_add(struct ieee80211_local *local, const char *name, 1845 unsigned char name_assign_type, 1846 struct wireless_dev **new_wdev, enum nl80211_iftype type, 1847 struct vif_params *params) 1848{ 1849 struct net_device *ndev = NULL; 1850 struct ieee80211_sub_if_data *sdata = NULL; 1851 struct txq_info *txqi; 1852 void (*if_setup)(struct net_device *dev); 1853 int ret, i; 1854 int txqs = 1; 1855 1856 ASSERT_RTNL(); 1857 1858 if (type == NL80211_IFTYPE_P2P_DEVICE || type == NL80211_IFTYPE_NAN) { 1859 struct wireless_dev *wdev; 1860 1861 sdata = kzalloc(sizeof(*sdata) + local->hw.vif_data_size, 1862 GFP_KERNEL); 1863 if (!sdata) 1864 return -ENOMEM; 1865 wdev = &sdata->wdev; 1866 1867 sdata->dev = NULL; 1868 strlcpy(sdata->name, name, IFNAMSIZ); 1869 ieee80211_assign_perm_addr(local, wdev->address, type); 1870 memcpy(sdata->vif.addr, wdev->address, ETH_ALEN); 1871 } else { 1872 int size = ALIGN(sizeof(*sdata) + local->hw.vif_data_size, 1873 sizeof(void *)); 1874 int txq_size = 0; 1875 1876 if (local->ops->wake_tx_queue && 1877 type != NL80211_IFTYPE_AP_VLAN && 1878 (type != NL80211_IFTYPE_MONITOR || 1879 (params->flags & MONITOR_FLAG_ACTIVE))) 1880 txq_size += sizeof(struct txq_info) + 1881 local->hw.txq_data_size; 1882 1883 if (local->ops->wake_tx_queue) { 1884 if_setup = ieee80211_if_setup_no_queue; 1885 } else { 1886 if_setup = ieee80211_if_setup; 1887 if (local->hw.queues >= IEEE80211_NUM_ACS) 1888 txqs = IEEE80211_NUM_ACS; 1889 } 1890 1891 ndev = alloc_netdev_mqs(size + txq_size, 1892 name, name_assign_type, 1893 if_setup, txqs, 1); 1894 if (!ndev) 1895 return -ENOMEM; 1896 1897 if (!local->ops->wake_tx_queue && local->hw.wiphy->tx_queue_len) 1898 ndev->tx_queue_len = local->hw.wiphy->tx_queue_len; 1899 1900 dev_net_set(ndev, wiphy_net(local->hw.wiphy)); 1901 1902 ndev->tstats = netdev_alloc_pcpu_stats(struct pcpu_sw_netstats); 1903 if (!ndev->tstats) { 1904 free_netdev(ndev); 1905 return -ENOMEM; 1906 } 1907 1908 ndev->needed_headroom = local->tx_headroom + 1909 4*6 /* four MAC addresses */ 1910 + 2 + 2 + 2 + 2 /* ctl, dur, seq, qos */ 1911 + 6 /* mesh */ 1912 + 8 /* rfc1042/bridge tunnel */ 1913 - ETH_HLEN /* ethernet hard_header_len */ 1914 + IEEE80211_ENCRYPT_HEADROOM; 1915 ndev->needed_tailroom = IEEE80211_ENCRYPT_TAILROOM; 1916 1917 ret = dev_alloc_name(ndev, ndev->name); 1918 if (ret < 0) { 1919 ieee80211_if_free(ndev); 1920 free_netdev(ndev); 1921 return ret; 1922 } 1923 1924 ieee80211_assign_perm_addr(local, ndev->perm_addr, type); 1925 if (is_valid_ether_addr(params->macaddr)) 1926 memcpy(ndev->dev_addr, params->macaddr, ETH_ALEN); 1927 else 1928 memcpy(ndev->dev_addr, ndev->perm_addr, ETH_ALEN); 1929 SET_NETDEV_DEV(ndev, wiphy_dev(local->hw.wiphy)); 1930 1931 /* don't use IEEE80211_DEV_TO_SUB_IF -- it checks too much */ 1932 sdata = netdev_priv(ndev); 1933 ndev->ieee80211_ptr = &sdata->wdev; 1934 memcpy(sdata->vif.addr, ndev->dev_addr, ETH_ALEN); 1935 memcpy(sdata->name, ndev->name, IFNAMSIZ); 1936 1937 if (txq_size) { 1938 txqi = netdev_priv(ndev) + size; 1939 ieee80211_txq_init(sdata, NULL, txqi, 0); 1940 } 1941 1942 sdata->dev = ndev; 1943 } 1944 1945 /* initialise type-independent data */ 1946 sdata->wdev.wiphy = local->hw.wiphy; 1947 sdata->local = local; 1948 1949 ieee80211_init_frag_cache(&sdata->frags); 1950 1951 INIT_LIST_HEAD(&sdata->key_list); 1952 1953 INIT_DELAYED_WORK(&sdata->dfs_cac_timer_work, 1954 ieee80211_dfs_cac_timer_work); 1955 INIT_DELAYED_WORK(&sdata->dec_tailroom_needed_wk, 1956 ieee80211_delayed_tailroom_dec); 1957 1958 for (i = 0; i < NUM_NL80211_BANDS; i++) { 1959 struct ieee80211_supported_band *sband; 1960 sband = local->hw.wiphy->bands[i]; 1961 sdata->rc_rateidx_mask[i] = 1962 sband ? (1 << sband->n_bitrates) - 1 : 0; 1963 if (sband) { 1964 __le16 cap; 1965 u16 *vht_rate_mask; 1966 1967 memcpy(sdata->rc_rateidx_mcs_mask[i], 1968 sband->ht_cap.mcs.rx_mask, 1969 sizeof(sdata->rc_rateidx_mcs_mask[i])); 1970 1971 cap = sband->vht_cap.vht_mcs.rx_mcs_map; 1972 vht_rate_mask = sdata->rc_rateidx_vht_mcs_mask[i]; 1973 ieee80211_get_vht_mask_from_cap(cap, vht_rate_mask); 1974 } else { 1975 memset(sdata->rc_rateidx_mcs_mask[i], 0, 1976 sizeof(sdata->rc_rateidx_mcs_mask[i])); 1977 memset(sdata->rc_rateidx_vht_mcs_mask[i], 0, 1978 sizeof(sdata->rc_rateidx_vht_mcs_mask[i])); 1979 } 1980 } 1981 1982 ieee80211_set_default_queues(sdata); 1983 1984 sdata->ap_power_level = IEEE80211_UNSET_POWER_LEVEL; 1985 sdata->user_power_level = local->user_power_level; 1986 1987 sdata->encrypt_headroom = IEEE80211_ENCRYPT_HEADROOM; 1988 1989 /* setup type-dependent data */ 1990 ieee80211_setup_sdata(sdata, type); 1991 1992 if (ndev) { 1993 ndev->ieee80211_ptr->use_4addr = params->use_4addr; 1994 if (type == NL80211_IFTYPE_STATION) 1995 sdata->u.mgd.use_4addr = params->use_4addr; 1996 1997 ndev->features |= local->hw.netdev_features; 1998 ndev->hw_features |= ndev->features & 1999 MAC80211_SUPPORTED_FEATURES_TX; 2000 2001 netdev_set_default_ethtool_ops(ndev, &ieee80211_ethtool_ops); 2002 2003 /* MTU range is normally 256 - 2304, where the upper limit is 2004 * the maximum MSDU size. Monitor interfaces send and receive 2005 * MPDU and A-MSDU frames which may be much larger so we do 2006 * not impose an upper limit in that case. 2007 */ 2008 ndev->min_mtu = 256; 2009 if (type == NL80211_IFTYPE_MONITOR) 2010 ndev->max_mtu = 0; 2011 else 2012 ndev->max_mtu = local->hw.max_mtu; 2013 2014 ret = register_netdevice(ndev); 2015 if (ret) { 2016 free_netdev(ndev); 2017 return ret; 2018 } 2019 } 2020 2021 mutex_lock(&local->iflist_mtx); 2022 list_add_tail_rcu(&sdata->list, &local->interfaces); 2023 mutex_unlock(&local->iflist_mtx); 2024 2025 if (new_wdev) 2026 *new_wdev = &sdata->wdev; 2027 2028 return 0; 2029} 2030 2031void ieee80211_if_remove(struct ieee80211_sub_if_data *sdata) 2032{ 2033 ASSERT_RTNL(); 2034 2035 mutex_lock(&sdata->local->iflist_mtx); 2036 list_del_rcu(&sdata->list); 2037 mutex_unlock(&sdata->local->iflist_mtx); 2038 2039 if (sdata->vif.txq) 2040 ieee80211_txq_purge(sdata->local, to_txq_info(sdata->vif.txq)); 2041 2042 synchronize_rcu(); 2043 2044 if (sdata->dev) { 2045 unregister_netdevice(sdata->dev); 2046 } else { 2047 cfg80211_unregister_wdev(&sdata->wdev); 2048 ieee80211_teardown_sdata(sdata); 2049 kfree(sdata); 2050 } 2051} 2052 2053void ieee80211_sdata_stop(struct ieee80211_sub_if_data *sdata) 2054{ 2055 if (WARN_ON_ONCE(!test_bit(SDATA_STATE_RUNNING, &sdata->state))) 2056 return; 2057 ieee80211_do_stop(sdata, true); 2058} 2059 2060void ieee80211_remove_interfaces(struct ieee80211_local *local) 2061{ 2062 struct ieee80211_sub_if_data *sdata, *tmp; 2063 LIST_HEAD(unreg_list); 2064 LIST_HEAD(wdev_list); 2065 2066 ASSERT_RTNL(); 2067 2068 /* Before destroying the interfaces, make sure they're all stopped so 2069 * that the hardware is stopped. Otherwise, the driver might still be 2070 * iterating the interfaces during the shutdown, e.g. from a worker 2071 * or from RX processing or similar, and if it does so (using atomic 2072 * iteration) while we're manipulating the list, the iteration will 2073 * crash. 2074 * 2075 * After this, the hardware should be stopped and the driver should 2076 * have stopped all of its activities, so that we can do RCU-unaware 2077 * manipulations of the interface list below. 2078 */ 2079 cfg80211_shutdown_all_interfaces(local->hw.wiphy); 2080 2081 WARN(local->open_count, "%s: open count remains %d\n", 2082 wiphy_name(local->hw.wiphy), local->open_count); 2083 2084 ieee80211_txq_teardown_flows(local); 2085 2086 mutex_lock(&local->iflist_mtx); 2087 list_for_each_entry_safe(sdata, tmp, &local->interfaces, list) { 2088 list_del(&sdata->list); 2089 2090 if (sdata->dev) 2091 unregister_netdevice_queue(sdata->dev, &unreg_list); 2092 else 2093 list_add(&sdata->list, &wdev_list); 2094 } 2095 mutex_unlock(&local->iflist_mtx); 2096 unregister_netdevice_many(&unreg_list); 2097 2098 list_for_each_entry_safe(sdata, tmp, &wdev_list, list) { 2099 list_del(&sdata->list); 2100 cfg80211_unregister_wdev(&sdata->wdev); 2101 kfree(sdata); 2102 } 2103} 2104 2105static int netdev_notify(struct notifier_block *nb, 2106 unsigned long state, void *ptr) 2107{ 2108 struct net_device *dev = netdev_notifier_info_to_dev(ptr); 2109 struct ieee80211_sub_if_data *sdata; 2110 2111 if (state != NETDEV_CHANGENAME) 2112 return NOTIFY_DONE; 2113 2114 if (!dev->ieee80211_ptr || !dev->ieee80211_ptr->wiphy) 2115 return NOTIFY_DONE; 2116 2117 if (dev->ieee80211_ptr->wiphy->privid != mac80211_wiphy_privid) 2118 return NOTIFY_DONE; 2119 2120 sdata = IEEE80211_DEV_TO_SUB_IF(dev); 2121 memcpy(sdata->name, dev->name, IFNAMSIZ); 2122 ieee80211_debugfs_rename_netdev(sdata); 2123 2124 return NOTIFY_OK; 2125} 2126 2127static struct notifier_block mac80211_netdev_notifier = { 2128 .notifier_call = netdev_notify, 2129}; 2130 2131int ieee80211_iface_init(void) 2132{ 2133 return register_netdevice_notifier(&mac80211_netdev_notifier); 2134} 2135 2136void ieee80211_iface_exit(void) 2137{ 2138 unregister_netdevice_notifier(&mac80211_netdev_notifier); 2139} 2140 2141void ieee80211_vif_inc_num_mcast(struct ieee80211_sub_if_data *sdata) 2142{ 2143 if (sdata->vif.type == NL80211_IFTYPE_AP) 2144 atomic_inc(&sdata->u.ap.num_mcast_sta); 2145 else if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) 2146 atomic_inc(&sdata->u.vlan.num_mcast_sta); 2147} 2148 2149void ieee80211_vif_dec_num_mcast(struct ieee80211_sub_if_data *sdata) 2150{ 2151 if (sdata->vif.type == NL80211_IFTYPE_AP) 2152 atomic_dec(&sdata->u.ap.num_mcast_sta); 2153 else if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) 2154 atomic_dec(&sdata->u.vlan.num_mcast_sta); 2155} 2156