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) 2018-2020 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 45 static void ieee80211_iface_work(struct work_struct *work); 46 47 bool __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 77 void 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 85 static 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 94 static 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 } 104 105 static 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 } 139 140 u32 ieee80211_idle_off(struct ieee80211_local *local) 141 { 142 return __ieee80211_recalc_idle(local, true); 143 } 144 145 void 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 } 151 152 static 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 } 200 201 static 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 } 226 227 static 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_AP_VLAN) || 234 (type1 == NL80211_IFTYPE_AP_VLAN && 235 (type2 == NL80211_IFTYPE_AP || 236 type2 == NL80211_IFTYPE_AP_VLAN)); 237 } 238 239 static int ieee80211_check_concurrent_iface(struct ieee80211_sub_if_data *sdata, 240 enum nl80211_iftype iftype) 241 { 242 struct ieee80211_local *local = sdata->local; 243 struct ieee80211_sub_if_data *nsdata; 244 int ret; 245 246 ASSERT_RTNL(); 247 248 /* we hold the RTNL here so can safely walk the list */ 249 list_for_each_entry(nsdata, &local->interfaces, list) { 250 if (nsdata != sdata && ieee80211_sdata_running(nsdata)) { 251 /* 252 * Only OCB and monitor mode may coexist 253 */ 254 if ((sdata->vif.type == NL80211_IFTYPE_OCB && 255 nsdata->vif.type != NL80211_IFTYPE_MONITOR) || 256 (sdata->vif.type != NL80211_IFTYPE_MONITOR && 257 nsdata->vif.type == NL80211_IFTYPE_OCB)) 258 return -EBUSY; 259 260 /* 261 * Allow only a single IBSS interface to be up at any 262 * time. This is restricted because beacon distribution 263 * cannot work properly if both are in the same IBSS. 264 * 265 * To remove this restriction we'd have to disallow them 266 * from setting the same SSID on different IBSS interfaces 267 * belonging to the same hardware. Then, however, we're 268 * faced with having to adopt two different TSF timers... 269 */ 270 if (iftype == NL80211_IFTYPE_ADHOC && 271 nsdata->vif.type == NL80211_IFTYPE_ADHOC) 272 return -EBUSY; 273 /* 274 * will not add another interface while any channel 275 * switch is active. 276 */ 277 if (nsdata->vif.csa_active) 278 return -EBUSY; 279 280 /* 281 * The remaining checks are only performed for interfaces 282 * with the same MAC address. 283 */ 284 if (!ether_addr_equal(sdata->vif.addr, 285 nsdata->vif.addr)) 286 continue; 287 288 /* 289 * check whether it may have the same address 290 */ 291 if (!identical_mac_addr_allowed(iftype, 292 nsdata->vif.type)) 293 return -ENOTUNIQ; 294 295 /* 296 * can only add VLANs to enabled APs 297 */ 298 if (iftype == NL80211_IFTYPE_AP_VLAN && 299 nsdata->vif.type == NL80211_IFTYPE_AP) 300 sdata->bss = &nsdata->u.ap; 301 } 302 } 303 304 mutex_lock(&local->chanctx_mtx); 305 ret = ieee80211_check_combinations(sdata, NULL, 0, 0); 306 mutex_unlock(&local->chanctx_mtx); 307 return ret; 308 } 309 310 static int ieee80211_check_queues(struct ieee80211_sub_if_data *sdata, 311 enum nl80211_iftype iftype) 312 { 313 int n_queues = sdata->local->hw.queues; 314 int i; 315 316 if (iftype == NL80211_IFTYPE_NAN) 317 return 0; 318 319 if (iftype != NL80211_IFTYPE_P2P_DEVICE) { 320 for (i = 0; i < IEEE80211_NUM_ACS; i++) { 321 if (WARN_ON_ONCE(sdata->vif.hw_queue[i] == 322 IEEE80211_INVAL_HW_QUEUE)) 323 return -EINVAL; 324 if (WARN_ON_ONCE(sdata->vif.hw_queue[i] >= 325 n_queues)) 326 return -EINVAL; 327 } 328 } 329 330 if ((iftype != NL80211_IFTYPE_AP && 331 iftype != NL80211_IFTYPE_P2P_GO && 332 iftype != NL80211_IFTYPE_MESH_POINT) || 333 !ieee80211_hw_check(&sdata->local->hw, QUEUE_CONTROL)) { 334 sdata->vif.cab_queue = IEEE80211_INVAL_HW_QUEUE; 335 return 0; 336 } 337 338 if (WARN_ON_ONCE(sdata->vif.cab_queue == IEEE80211_INVAL_HW_QUEUE)) 339 return -EINVAL; 340 341 if (WARN_ON_ONCE(sdata->vif.cab_queue >= n_queues)) 342 return -EINVAL; 343 344 return 0; 345 } 346 347 static int ieee80211_open(struct net_device *dev) 348 { 349 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); 350 int err; 351 352 /* fail early if user set an invalid address */ 353 if (!is_valid_ether_addr(dev->dev_addr)) 354 return -EADDRNOTAVAIL; 355 356 err = ieee80211_check_concurrent_iface(sdata, sdata->vif.type); 357 if (err) 358 return err; 359 360 wiphy_lock(sdata->local->hw.wiphy); 361 err = ieee80211_do_open(&sdata->wdev, true); 362 wiphy_unlock(sdata->local->hw.wiphy); 363 364 return err; 365 } 366 367 static void ieee80211_do_stop(struct ieee80211_sub_if_data *sdata, bool going_down) 368 { 369 struct ieee80211_local *local = sdata->local; 370 unsigned long flags; 371 struct sk_buff *skb, *tmp; 372 u32 hw_reconf_flags = 0; 373 int i, flushed; 374 struct ps_data *ps; 375 struct cfg80211_chan_def chandef; 376 bool cancel_scan; 377 struct cfg80211_nan_func *func; 378 379 clear_bit(SDATA_STATE_RUNNING, &sdata->state); 380 381 cancel_scan = rcu_access_pointer(local->scan_sdata) == sdata; 382 if (cancel_scan) 383 ieee80211_scan_cancel(local); 384 385 /* 386 * Stop TX on this interface first. 387 */ 388 if (sdata->dev) 389 netif_tx_stop_all_queues(sdata->dev); 390 391 ieee80211_roc_purge(local, sdata); 392 393 switch (sdata->vif.type) { 394 case NL80211_IFTYPE_STATION: 395 ieee80211_mgd_stop(sdata); 396 break; 397 case NL80211_IFTYPE_ADHOC: 398 ieee80211_ibss_stop(sdata); 399 break; 400 case NL80211_IFTYPE_MONITOR: 401 if (sdata->u.mntr.flags & MONITOR_FLAG_COOK_FRAMES) 402 break; 403 list_del_rcu(&sdata->u.mntr.list); 404 break; 405 default: 406 break; 407 } 408 409 /* 410 * Remove all stations associated with this interface. 411 * 412 * This must be done before calling ops->remove_interface() 413 * because otherwise we can later invoke ops->sta_notify() 414 * whenever the STAs are removed, and that invalidates driver 415 * assumptions about always getting a vif pointer that is valid 416 * (because if we remove a STA after ops->remove_interface() 417 * the driver will have removed the vif info already!) 418 * 419 * For AP_VLANs stations may exist since there's nothing else that 420 * would have removed them, but in other modes there shouldn't 421 * be any stations. 422 */ 423 flushed = sta_info_flush(sdata); 424 WARN_ON_ONCE(sdata->vif.type != NL80211_IFTYPE_AP_VLAN && flushed > 0); 425 426 /* don't count this interface for allmulti while it is down */ 427 if (sdata->flags & IEEE80211_SDATA_ALLMULTI) 428 atomic_dec(&local->iff_allmultis); 429 430 if (sdata->vif.type == NL80211_IFTYPE_AP) { 431 local->fif_pspoll--; 432 local->fif_probe_req--; 433 } else if (sdata->vif.type == NL80211_IFTYPE_ADHOC) { 434 local->fif_probe_req--; 435 } 436 437 if (sdata->dev) { 438 netif_addr_lock_bh(sdata->dev); 439 spin_lock_bh(&local->filter_lock); 440 __hw_addr_unsync(&local->mc_list, &sdata->dev->mc, 441 sdata->dev->addr_len); 442 spin_unlock_bh(&local->filter_lock); 443 netif_addr_unlock_bh(sdata->dev); 444 } 445 446 del_timer_sync(&local->dynamic_ps_timer); 447 cancel_work_sync(&local->dynamic_ps_enable_work); 448 449 cancel_work_sync(&sdata->recalc_smps); 450 sdata_lock(sdata); 451 mutex_lock(&local->mtx); 452 sdata->vif.csa_active = false; 453 if (sdata->vif.type == NL80211_IFTYPE_STATION) 454 sdata->u.mgd.csa_waiting_bcn = false; 455 if (sdata->csa_block_tx) { 456 ieee80211_wake_vif_queues(local, sdata, 457 IEEE80211_QUEUE_STOP_REASON_CSA); 458 sdata->csa_block_tx = false; 459 } 460 mutex_unlock(&local->mtx); 461 sdata_unlock(sdata); 462 463 cancel_work_sync(&sdata->csa_finalize_work); 464 465 cancel_delayed_work_sync(&sdata->dfs_cac_timer_work); 466 467 if (sdata->wdev.cac_started) { 468 chandef = sdata->vif.bss_conf.chandef; 469 WARN_ON(local->suspended); 470 mutex_lock(&local->mtx); 471 ieee80211_vif_release_channel(sdata); 472 mutex_unlock(&local->mtx); 473 cfg80211_cac_event(sdata->dev, &chandef, 474 NL80211_RADAR_CAC_ABORTED, 475 GFP_KERNEL); 476 } 477 478 /* APs need special treatment */ 479 if (sdata->vif.type == NL80211_IFTYPE_AP) { 480 struct ieee80211_sub_if_data *vlan, *tmpsdata; 481 482 /* down all dependent devices, that is VLANs */ 483 list_for_each_entry_safe(vlan, tmpsdata, &sdata->u.ap.vlans, 484 u.vlan.list) 485 dev_close(vlan->dev); 486 WARN_ON(!list_empty(&sdata->u.ap.vlans)); 487 } else if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) { 488 /* remove all packets in parent bc_buf pointing to this dev */ 489 ps = &sdata->bss->ps; 490 491 spin_lock_irqsave(&ps->bc_buf.lock, flags); 492 skb_queue_walk_safe(&ps->bc_buf, skb, tmp) { 493 if (skb->dev == sdata->dev) { 494 __skb_unlink(skb, &ps->bc_buf); 495 local->total_ps_buffered--; 496 ieee80211_free_txskb(&local->hw, skb); 497 } 498 } 499 spin_unlock_irqrestore(&ps->bc_buf.lock, flags); 500 } 501 502 if (going_down) 503 local->open_count--; 504 505 switch (sdata->vif.type) { 506 case NL80211_IFTYPE_AP_VLAN: 507 mutex_lock(&local->mtx); 508 list_del(&sdata->u.vlan.list); 509 mutex_unlock(&local->mtx); 510 RCU_INIT_POINTER(sdata->vif.chanctx_conf, NULL); 511 /* see comment in the default case below */ 512 ieee80211_free_keys(sdata, true); 513 /* no need to tell driver */ 514 break; 515 case NL80211_IFTYPE_MONITOR: 516 if (sdata->u.mntr.flags & MONITOR_FLAG_COOK_FRAMES) { 517 local->cooked_mntrs--; 518 break; 519 } 520 521 local->monitors--; 522 if (local->monitors == 0) { 523 local->hw.conf.flags &= ~IEEE80211_CONF_MONITOR; 524 hw_reconf_flags |= IEEE80211_CONF_CHANGE_MONITOR; 525 } 526 527 ieee80211_adjust_monitor_flags(sdata, -1); 528 break; 529 case NL80211_IFTYPE_NAN: 530 /* clean all the functions */ 531 spin_lock_bh(&sdata->u.nan.func_lock); 532 533 idr_for_each_entry(&sdata->u.nan.function_inst_ids, func, i) { 534 idr_remove(&sdata->u.nan.function_inst_ids, i); 535 cfg80211_free_nan_func(func); 536 } 537 idr_destroy(&sdata->u.nan.function_inst_ids); 538 539 spin_unlock_bh(&sdata->u.nan.func_lock); 540 break; 541 case NL80211_IFTYPE_P2P_DEVICE: 542 /* relies on synchronize_rcu() below */ 543 RCU_INIT_POINTER(local->p2p_sdata, NULL); 544 fallthrough; 545 default: 546 cancel_work_sync(&sdata->work); 547 /* 548 * When we get here, the interface is marked down. 549 * Free the remaining keys, if there are any 550 * (which can happen in AP mode if userspace sets 551 * keys before the interface is operating) 552 * 553 * Force the key freeing to always synchronize_net() 554 * to wait for the RX path in case it is using this 555 * interface enqueuing frames at this very time on 556 * another CPU. 557 */ 558 ieee80211_free_keys(sdata, true); 559 skb_queue_purge(&sdata->skb_queue); 560 } 561 562 spin_lock_irqsave(&local->queue_stop_reason_lock, flags); 563 for (i = 0; i < IEEE80211_MAX_QUEUES; i++) { 564 skb_queue_walk_safe(&local->pending[i], skb, tmp) { 565 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); 566 if (info->control.vif == &sdata->vif) { 567 __skb_unlink(skb, &local->pending[i]); 568 ieee80211_free_txskb(&local->hw, skb); 569 } 570 } 571 } 572 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); 573 574 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) 575 ieee80211_txq_remove_vlan(local, sdata); 576 577 sdata->bss = NULL; 578 579 if (local->open_count == 0) 580 ieee80211_clear_tx_pending(local); 581 582 sdata->vif.bss_conf.beacon_int = 0; 583 584 /* 585 * If the interface goes down while suspended, presumably because 586 * the device was unplugged and that happens before our resume, 587 * then the driver is already unconfigured and the remainder of 588 * this function isn't needed. 589 * XXX: what about WoWLAN? If the device has software state, e.g. 590 * memory allocated, it might expect teardown commands from 591 * mac80211 here? 592 */ 593 if (local->suspended) { 594 WARN_ON(local->wowlan); 595 WARN_ON(rtnl_dereference(local->monitor_sdata)); 596 return; 597 } 598 599 switch (sdata->vif.type) { 600 case NL80211_IFTYPE_AP_VLAN: 601 break; 602 case NL80211_IFTYPE_MONITOR: 603 if (local->monitors == 0) 604 ieee80211_del_virtual_monitor(local); 605 606 mutex_lock(&local->mtx); 607 ieee80211_recalc_idle(local); 608 mutex_unlock(&local->mtx); 609 610 if (!(sdata->u.mntr.flags & MONITOR_FLAG_ACTIVE)) 611 break; 612 613 fallthrough; 614 default: 615 if (going_down) 616 drv_remove_interface(local, sdata); 617 } 618 619 ieee80211_recalc_ps(local); 620 621 if (cancel_scan) 622 flush_delayed_work(&local->scan_work); 623 624 if (local->open_count == 0) { 625 ieee80211_stop_device(local); 626 627 /* no reconfiguring after stop! */ 628 return; 629 } 630 631 /* do after stop to avoid reconfiguring when we stop anyway */ 632 ieee80211_configure_filter(local); 633 ieee80211_hw_config(local, hw_reconf_flags); 634 635 if (local->monitors == local->open_count) 636 ieee80211_add_virtual_monitor(local); 637 } 638 639 static int ieee80211_stop(struct net_device *dev) 640 { 641 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); 642 643 wiphy_lock(sdata->local->hw.wiphy); 644 ieee80211_do_stop(sdata, true); 645 wiphy_unlock(sdata->local->hw.wiphy); 646 647 return 0; 648 } 649 650 static void ieee80211_set_multicast_list(struct net_device *dev) 651 { 652 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); 653 struct ieee80211_local *local = sdata->local; 654 int allmulti, sdata_allmulti; 655 656 allmulti = !!(dev->flags & IFF_ALLMULTI); 657 sdata_allmulti = !!(sdata->flags & IEEE80211_SDATA_ALLMULTI); 658 659 if (allmulti != sdata_allmulti) { 660 if (dev->flags & IFF_ALLMULTI) 661 atomic_inc(&local->iff_allmultis); 662 else 663 atomic_dec(&local->iff_allmultis); 664 sdata->flags ^= IEEE80211_SDATA_ALLMULTI; 665 } 666 667 spin_lock_bh(&local->filter_lock); 668 __hw_addr_sync(&local->mc_list, &dev->mc, dev->addr_len); 669 spin_unlock_bh(&local->filter_lock); 670 ieee80211_queue_work(&local->hw, &local->reconfig_filter); 671 } 672 673 /* 674 * Called when the netdev is removed or, by the code below, before 675 * the interface type changes. 676 */ 677 static void ieee80211_teardown_sdata(struct ieee80211_sub_if_data *sdata) 678 { 679 int i; 680 681 /* free extra data */ 682 ieee80211_free_keys(sdata, false); 683 684 ieee80211_debugfs_remove_netdev(sdata); 685 686 for (i = 0; i < IEEE80211_FRAGMENT_MAX; i++) 687 __skb_queue_purge(&sdata->fragments[i].skb_list); 688 sdata->fragment_next = 0; 689 690 if (ieee80211_vif_is_mesh(&sdata->vif)) 691 ieee80211_mesh_teardown_sdata(sdata); 692 } 693 694 static void ieee80211_uninit(struct net_device *dev) 695 { 696 ieee80211_teardown_sdata(IEEE80211_DEV_TO_SUB_IF(dev)); 697 } 698 699 static u16 ieee80211_netdev_select_queue(struct net_device *dev, 700 struct sk_buff *skb, 701 struct net_device *sb_dev) 702 { 703 return ieee80211_select_queue(IEEE80211_DEV_TO_SUB_IF(dev), skb); 704 } 705 706 static void 707 ieee80211_get_stats64(struct net_device *dev, struct rtnl_link_stats64 *stats) 708 { 709 dev_fetch_sw_netstats(stats, dev->tstats); 710 } 711 712 static const struct net_device_ops ieee80211_dataif_ops = { 713 .ndo_open = ieee80211_open, 714 .ndo_stop = ieee80211_stop, 715 .ndo_uninit = ieee80211_uninit, 716 .ndo_start_xmit = ieee80211_subif_start_xmit, 717 .ndo_set_rx_mode = ieee80211_set_multicast_list, 718 .ndo_set_mac_address = ieee80211_change_mac, 719 .ndo_select_queue = ieee80211_netdev_select_queue, 720 .ndo_get_stats64 = ieee80211_get_stats64, 721 }; 722 723 static u16 ieee80211_monitor_select_queue(struct net_device *dev, 724 struct sk_buff *skb, 725 struct net_device *sb_dev) 726 { 727 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); 728 struct ieee80211_local *local = sdata->local; 729 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); 730 struct ieee80211_hdr *hdr; 731 int len_rthdr; 732 733 if (local->hw.queues < IEEE80211_NUM_ACS) 734 return 0; 735 736 /* reset flags and info before parsing radiotap header */ 737 memset(info, 0, sizeof(*info)); 738 739 if (!ieee80211_parse_tx_radiotap(skb, dev)) 740 return 0; /* doesn't matter, frame will be dropped */ 741 742 len_rthdr = ieee80211_get_radiotap_len(skb->data); 743 hdr = (struct ieee80211_hdr *)(skb->data + len_rthdr); 744 if (skb->len < len_rthdr + 2 || 745 skb->len < len_rthdr + ieee80211_hdrlen(hdr->frame_control)) 746 return 0; /* doesn't matter, frame will be dropped */ 747 748 return ieee80211_select_queue_80211(sdata, skb, hdr); 749 } 750 751 static const struct net_device_ops ieee80211_monitorif_ops = { 752 .ndo_open = ieee80211_open, 753 .ndo_stop = ieee80211_stop, 754 .ndo_uninit = ieee80211_uninit, 755 .ndo_start_xmit = ieee80211_monitor_start_xmit, 756 .ndo_set_rx_mode = ieee80211_set_multicast_list, 757 .ndo_set_mac_address = ieee80211_change_mac, 758 .ndo_select_queue = ieee80211_monitor_select_queue, 759 .ndo_get_stats64 = ieee80211_get_stats64, 760 }; 761 762 static const struct net_device_ops ieee80211_dataif_8023_ops = { 763 .ndo_open = ieee80211_open, 764 .ndo_stop = ieee80211_stop, 765 .ndo_uninit = ieee80211_uninit, 766 .ndo_start_xmit = ieee80211_subif_start_xmit_8023, 767 .ndo_set_rx_mode = ieee80211_set_multicast_list, 768 .ndo_set_mac_address = ieee80211_change_mac, 769 .ndo_select_queue = ieee80211_netdev_select_queue, 770 .ndo_get_stats64 = ieee80211_get_stats64, 771 }; 772 773 static bool ieee80211_iftype_supports_hdr_offload(enum nl80211_iftype iftype) 774 { 775 switch (iftype) { 776 /* P2P GO and client are mapped to AP/STATION types */ 777 case NL80211_IFTYPE_AP: 778 case NL80211_IFTYPE_STATION: 779 return true; 780 default: 781 return false; 782 } 783 } 784 785 static bool ieee80211_set_sdata_offload_flags(struct ieee80211_sub_if_data *sdata) 786 { 787 struct ieee80211_local *local = sdata->local; 788 u32 flags; 789 790 flags = sdata->vif.offload_flags; 791 792 if (ieee80211_hw_check(&local->hw, SUPPORTS_TX_ENCAP_OFFLOAD) && 793 ieee80211_iftype_supports_hdr_offload(sdata->vif.type)) { 794 flags |= IEEE80211_OFFLOAD_ENCAP_ENABLED; 795 796 if (!ieee80211_hw_check(&local->hw, SUPPORTS_TX_FRAG) && 797 local->hw.wiphy->frag_threshold != (u32)-1) 798 flags &= ~IEEE80211_OFFLOAD_ENCAP_ENABLED; 799 800 if (local->monitors) 801 flags &= ~IEEE80211_OFFLOAD_ENCAP_ENABLED; 802 } else { 803 flags &= ~IEEE80211_OFFLOAD_ENCAP_ENABLED; 804 } 805 806 if (ieee80211_hw_check(&local->hw, SUPPORTS_RX_DECAP_OFFLOAD) && 807 ieee80211_iftype_supports_hdr_offload(sdata->vif.type)) { 808 flags |= IEEE80211_OFFLOAD_DECAP_ENABLED; 809 810 if (local->monitors) 811 flags &= ~IEEE80211_OFFLOAD_DECAP_ENABLED; 812 } else { 813 flags &= ~IEEE80211_OFFLOAD_DECAP_ENABLED; 814 } 815 816 if (sdata->vif.offload_flags == flags) 817 return false; 818 819 sdata->vif.offload_flags = flags; 820 ieee80211_check_fast_rx_iface(sdata); 821 return true; 822 } 823 824 static void ieee80211_set_vif_encap_ops(struct ieee80211_sub_if_data *sdata) 825 { 826 struct ieee80211_local *local = sdata->local; 827 struct ieee80211_sub_if_data *bss = sdata; 828 bool enabled; 829 830 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) { 831 if (!sdata->bss) 832 return; 833 834 bss = container_of(sdata->bss, struct ieee80211_sub_if_data, u.ap); 835 } 836 837 if (!ieee80211_hw_check(&local->hw, SUPPORTS_TX_ENCAP_OFFLOAD) || 838 !ieee80211_iftype_supports_hdr_offload(bss->vif.type)) 839 return; 840 841 enabled = bss->vif.offload_flags & IEEE80211_OFFLOAD_ENCAP_ENABLED; 842 if (sdata->wdev.use_4addr && 843 !(bss->vif.offload_flags & IEEE80211_OFFLOAD_ENCAP_4ADDR)) 844 enabled = false; 845 846 sdata->dev->netdev_ops = enabled ? &ieee80211_dataif_8023_ops : 847 &ieee80211_dataif_ops; 848 } 849 850 static void ieee80211_recalc_sdata_offload(struct ieee80211_sub_if_data *sdata) 851 { 852 struct ieee80211_local *local = sdata->local; 853 struct ieee80211_sub_if_data *vsdata; 854 855 if (ieee80211_set_sdata_offload_flags(sdata)) { 856 drv_update_vif_offload(local, sdata); 857 ieee80211_set_vif_encap_ops(sdata); 858 } 859 860 list_for_each_entry(vsdata, &local->interfaces, list) { 861 if (vsdata->vif.type != NL80211_IFTYPE_AP_VLAN || 862 vsdata->bss != &sdata->u.ap) 863 continue; 864 865 ieee80211_set_vif_encap_ops(vsdata); 866 } 867 } 868 869 void ieee80211_recalc_offload(struct ieee80211_local *local) 870 { 871 struct ieee80211_sub_if_data *sdata; 872 873 if (!ieee80211_hw_check(&local->hw, SUPPORTS_TX_ENCAP_OFFLOAD)) 874 return; 875 876 mutex_lock(&local->iflist_mtx); 877 878 list_for_each_entry(sdata, &local->interfaces, list) { 879 if (!ieee80211_sdata_running(sdata)) 880 continue; 881 882 ieee80211_recalc_sdata_offload(sdata); 883 } 884 885 mutex_unlock(&local->iflist_mtx); 886 } 887 888 void ieee80211_adjust_monitor_flags(struct ieee80211_sub_if_data *sdata, 889 const int offset) 890 { 891 struct ieee80211_local *local = sdata->local; 892 u32 flags = sdata->u.mntr.flags; 893 894 #define ADJUST(_f, _s) do { \ 895 if (flags & MONITOR_FLAG_##_f) \ 896 local->fif_##_s += offset; \ 897 } while (0) 898 899 ADJUST(FCSFAIL, fcsfail); 900 ADJUST(PLCPFAIL, plcpfail); 901 ADJUST(CONTROL, control); 902 ADJUST(CONTROL, pspoll); 903 ADJUST(OTHER_BSS, other_bss); 904 905 #undef ADJUST 906 } 907 908 static void ieee80211_set_default_queues(struct ieee80211_sub_if_data *sdata) 909 { 910 struct ieee80211_local *local = sdata->local; 911 int i; 912 913 for (i = 0; i < IEEE80211_NUM_ACS; i++) { 914 if (ieee80211_hw_check(&local->hw, QUEUE_CONTROL)) 915 sdata->vif.hw_queue[i] = IEEE80211_INVAL_HW_QUEUE; 916 else if (local->hw.queues >= IEEE80211_NUM_ACS) 917 sdata->vif.hw_queue[i] = i; 918 else 919 sdata->vif.hw_queue[i] = 0; 920 } 921 sdata->vif.cab_queue = IEEE80211_INVAL_HW_QUEUE; 922 } 923 924 int ieee80211_add_virtual_monitor(struct ieee80211_local *local) 925 { 926 struct ieee80211_sub_if_data *sdata; 927 int ret; 928 929 if (!ieee80211_hw_check(&local->hw, WANT_MONITOR_VIF)) 930 return 0; 931 932 ASSERT_RTNL(); 933 934 if (local->monitor_sdata) 935 return 0; 936 937 sdata = kzalloc(sizeof(*sdata) + local->hw.vif_data_size, GFP_KERNEL); 938 if (!sdata) 939 return -ENOMEM; 940 941 /* set up data */ 942 sdata->local = local; 943 sdata->vif.type = NL80211_IFTYPE_MONITOR; 944 snprintf(sdata->name, IFNAMSIZ, "%s-monitor", 945 wiphy_name(local->hw.wiphy)); 946 sdata->wdev.iftype = NL80211_IFTYPE_MONITOR; 947 948 sdata->encrypt_headroom = IEEE80211_ENCRYPT_HEADROOM; 949 950 ieee80211_set_default_queues(sdata); 951 952 ret = drv_add_interface(local, sdata); 953 if (WARN_ON(ret)) { 954 /* ok .. stupid driver, it asked for this! */ 955 kfree(sdata); 956 return ret; 957 } 958 959 set_bit(SDATA_STATE_RUNNING, &sdata->state); 960 961 ret = ieee80211_check_queues(sdata, NL80211_IFTYPE_MONITOR); 962 if (ret) { 963 kfree(sdata); 964 return ret; 965 } 966 967 mutex_lock(&local->iflist_mtx); 968 rcu_assign_pointer(local->monitor_sdata, sdata); 969 mutex_unlock(&local->iflist_mtx); 970 971 mutex_lock(&local->mtx); 972 ret = ieee80211_vif_use_channel(sdata, &local->monitor_chandef, 973 IEEE80211_CHANCTX_EXCLUSIVE); 974 mutex_unlock(&local->mtx); 975 if (ret) { 976 mutex_lock(&local->iflist_mtx); 977 RCU_INIT_POINTER(local->monitor_sdata, NULL); 978 mutex_unlock(&local->iflist_mtx); 979 synchronize_net(); 980 drv_remove_interface(local, sdata); 981 kfree(sdata); 982 return ret; 983 } 984 985 skb_queue_head_init(&sdata->skb_queue); 986 INIT_WORK(&sdata->work, ieee80211_iface_work); 987 988 return 0; 989 } 990 991 void ieee80211_del_virtual_monitor(struct ieee80211_local *local) 992 { 993 struct ieee80211_sub_if_data *sdata; 994 995 if (!ieee80211_hw_check(&local->hw, WANT_MONITOR_VIF)) 996 return; 997 998 ASSERT_RTNL(); 999 1000 mutex_lock(&local->iflist_mtx); 1001 1002 sdata = rcu_dereference_protected(local->monitor_sdata, 1003 lockdep_is_held(&local->iflist_mtx)); 1004 if (!sdata) { 1005 mutex_unlock(&local->iflist_mtx); 1006 return; 1007 } 1008 1009 RCU_INIT_POINTER(local->monitor_sdata, NULL); 1010 mutex_unlock(&local->iflist_mtx); 1011 1012 synchronize_net(); 1013 1014 mutex_lock(&local->mtx); 1015 ieee80211_vif_release_channel(sdata); 1016 mutex_unlock(&local->mtx); 1017 1018 drv_remove_interface(local, sdata); 1019 1020 kfree(sdata); 1021 } 1022 1023 /* 1024 * NOTE: Be very careful when changing this function, it must NOT return 1025 * an error on interface type changes that have been pre-checked, so most 1026 * checks should be in ieee80211_check_concurrent_iface. 1027 */ 1028 int ieee80211_do_open(struct wireless_dev *wdev, bool coming_up) 1029 { 1030 struct ieee80211_sub_if_data *sdata = IEEE80211_WDEV_TO_SUB_IF(wdev); 1031 struct net_device *dev = wdev->netdev; 1032 struct ieee80211_local *local = sdata->local; 1033 u32 changed = 0; 1034 int res; 1035 u32 hw_reconf_flags = 0; 1036 1037 switch (sdata->vif.type) { 1038 case NL80211_IFTYPE_AP_VLAN: { 1039 struct ieee80211_sub_if_data *master; 1040 1041 if (!sdata->bss) 1042 return -ENOLINK; 1043 1044 mutex_lock(&local->mtx); 1045 list_add(&sdata->u.vlan.list, &sdata->bss->vlans); 1046 mutex_unlock(&local->mtx); 1047 1048 master = container_of(sdata->bss, 1049 struct ieee80211_sub_if_data, u.ap); 1050 sdata->control_port_protocol = 1051 master->control_port_protocol; 1052 sdata->control_port_no_encrypt = 1053 master->control_port_no_encrypt; 1054 sdata->control_port_over_nl80211 = 1055 master->control_port_over_nl80211; 1056 sdata->control_port_no_preauth = 1057 master->control_port_no_preauth; 1058 sdata->vif.cab_queue = master->vif.cab_queue; 1059 memcpy(sdata->vif.hw_queue, master->vif.hw_queue, 1060 sizeof(sdata->vif.hw_queue)); 1061 sdata->vif.bss_conf.chandef = master->vif.bss_conf.chandef; 1062 1063 mutex_lock(&local->key_mtx); 1064 sdata->crypto_tx_tailroom_needed_cnt += 1065 master->crypto_tx_tailroom_needed_cnt; 1066 mutex_unlock(&local->key_mtx); 1067 1068 break; 1069 } 1070 case NL80211_IFTYPE_AP: 1071 sdata->bss = &sdata->u.ap; 1072 break; 1073 case NL80211_IFTYPE_MESH_POINT: 1074 case NL80211_IFTYPE_STATION: 1075 case NL80211_IFTYPE_MONITOR: 1076 case NL80211_IFTYPE_ADHOC: 1077 case NL80211_IFTYPE_P2P_DEVICE: 1078 case NL80211_IFTYPE_OCB: 1079 case NL80211_IFTYPE_NAN: 1080 /* no special treatment */ 1081 break; 1082 case NL80211_IFTYPE_UNSPECIFIED: 1083 case NUM_NL80211_IFTYPES: 1084 case NL80211_IFTYPE_P2P_CLIENT: 1085 case NL80211_IFTYPE_P2P_GO: 1086 case NL80211_IFTYPE_WDS: 1087 /* cannot happen */ 1088 WARN_ON(1); 1089 break; 1090 } 1091 1092 if (local->open_count == 0) { 1093 res = drv_start(local); 1094 if (res) 1095 goto err_del_bss; 1096 /* we're brought up, everything changes */ 1097 hw_reconf_flags = ~0; 1098 ieee80211_led_radio(local, true); 1099 ieee80211_mod_tpt_led_trig(local, 1100 IEEE80211_TPT_LEDTRIG_FL_RADIO, 0); 1101 } 1102 1103 /* 1104 * Copy the hopefully now-present MAC address to 1105 * this interface, if it has the special null one. 1106 */ 1107 if (dev && is_zero_ether_addr(dev->dev_addr)) { 1108 memcpy(dev->dev_addr, 1109 local->hw.wiphy->perm_addr, 1110 ETH_ALEN); 1111 memcpy(dev->perm_addr, dev->dev_addr, ETH_ALEN); 1112 1113 if (!is_valid_ether_addr(dev->dev_addr)) { 1114 res = -EADDRNOTAVAIL; 1115 goto err_stop; 1116 } 1117 } 1118 1119 switch (sdata->vif.type) { 1120 case NL80211_IFTYPE_AP_VLAN: 1121 /* no need to tell driver, but set carrier and chanctx */ 1122 if (rtnl_dereference(sdata->bss->beacon)) { 1123 ieee80211_vif_vlan_copy_chanctx(sdata); 1124 netif_carrier_on(dev); 1125 ieee80211_set_vif_encap_ops(sdata); 1126 } else { 1127 netif_carrier_off(dev); 1128 } 1129 break; 1130 case NL80211_IFTYPE_MONITOR: 1131 if (sdata->u.mntr.flags & MONITOR_FLAG_COOK_FRAMES) { 1132 local->cooked_mntrs++; 1133 break; 1134 } 1135 1136 if (sdata->u.mntr.flags & MONITOR_FLAG_ACTIVE) { 1137 res = drv_add_interface(local, sdata); 1138 if (res) 1139 goto err_stop; 1140 } else if (local->monitors == 0 && local->open_count == 0) { 1141 res = ieee80211_add_virtual_monitor(local); 1142 if (res) 1143 goto err_stop; 1144 } 1145 1146 /* must be before the call to ieee80211_configure_filter */ 1147 local->monitors++; 1148 if (local->monitors == 1) { 1149 local->hw.conf.flags |= IEEE80211_CONF_MONITOR; 1150 hw_reconf_flags |= IEEE80211_CONF_CHANGE_MONITOR; 1151 } 1152 1153 ieee80211_adjust_monitor_flags(sdata, 1); 1154 ieee80211_configure_filter(local); 1155 ieee80211_recalc_offload(local); 1156 mutex_lock(&local->mtx); 1157 ieee80211_recalc_idle(local); 1158 mutex_unlock(&local->mtx); 1159 1160 netif_carrier_on(dev); 1161 break; 1162 default: 1163 if (coming_up) { 1164 ieee80211_del_virtual_monitor(local); 1165 ieee80211_set_sdata_offload_flags(sdata); 1166 1167 res = drv_add_interface(local, sdata); 1168 if (res) 1169 goto err_stop; 1170 1171 ieee80211_set_vif_encap_ops(sdata); 1172 res = ieee80211_check_queues(sdata, 1173 ieee80211_vif_type_p2p(&sdata->vif)); 1174 if (res) 1175 goto err_del_interface; 1176 } 1177 1178 if (sdata->vif.type == NL80211_IFTYPE_AP) { 1179 local->fif_pspoll++; 1180 local->fif_probe_req++; 1181 1182 ieee80211_configure_filter(local); 1183 } else if (sdata->vif.type == NL80211_IFTYPE_ADHOC) { 1184 local->fif_probe_req++; 1185 } 1186 1187 if (sdata->vif.probe_req_reg) 1188 drv_config_iface_filter(local, sdata, 1189 FIF_PROBE_REQ, 1190 FIF_PROBE_REQ); 1191 1192 if (sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE && 1193 sdata->vif.type != NL80211_IFTYPE_NAN) 1194 changed |= ieee80211_reset_erp_info(sdata); 1195 ieee80211_bss_info_change_notify(sdata, changed); 1196 1197 switch (sdata->vif.type) { 1198 case NL80211_IFTYPE_STATION: 1199 case NL80211_IFTYPE_ADHOC: 1200 case NL80211_IFTYPE_AP: 1201 case NL80211_IFTYPE_MESH_POINT: 1202 case NL80211_IFTYPE_OCB: 1203 netif_carrier_off(dev); 1204 break; 1205 case NL80211_IFTYPE_P2P_DEVICE: 1206 case NL80211_IFTYPE_NAN: 1207 break; 1208 default: 1209 /* not reached */ 1210 WARN_ON(1); 1211 } 1212 1213 /* 1214 * Set default queue parameters so drivers don't 1215 * need to initialise the hardware if the hardware 1216 * doesn't start up with sane defaults. 1217 * Enable QoS for anything but station interfaces. 1218 */ 1219 ieee80211_set_wmm_default(sdata, true, 1220 sdata->vif.type != NL80211_IFTYPE_STATION); 1221 } 1222 1223 set_bit(SDATA_STATE_RUNNING, &sdata->state); 1224 1225 switch (sdata->vif.type) { 1226 case NL80211_IFTYPE_P2P_DEVICE: 1227 rcu_assign_pointer(local->p2p_sdata, sdata); 1228 break; 1229 case NL80211_IFTYPE_MONITOR: 1230 if (sdata->u.mntr.flags & MONITOR_FLAG_COOK_FRAMES) 1231 break; 1232 list_add_tail_rcu(&sdata->u.mntr.list, &local->mon_list); 1233 break; 1234 default: 1235 break; 1236 } 1237 1238 /* 1239 * set_multicast_list will be invoked by the networking core 1240 * which will check whether any increments here were done in 1241 * error and sync them down to the hardware as filter flags. 1242 */ 1243 if (sdata->flags & IEEE80211_SDATA_ALLMULTI) 1244 atomic_inc(&local->iff_allmultis); 1245 1246 if (coming_up) 1247 local->open_count++; 1248 1249 if (hw_reconf_flags) 1250 ieee80211_hw_config(local, hw_reconf_flags); 1251 1252 ieee80211_recalc_ps(local); 1253 1254 if (sdata->vif.type == NL80211_IFTYPE_MONITOR || 1255 sdata->vif.type == NL80211_IFTYPE_AP_VLAN || 1256 local->ops->wake_tx_queue) { 1257 /* XXX: for AP_VLAN, actually track AP queues */ 1258 if (dev) 1259 netif_tx_start_all_queues(dev); 1260 } else if (dev) { 1261 unsigned long flags; 1262 int n_acs = IEEE80211_NUM_ACS; 1263 int ac; 1264 1265 if (local->hw.queues < IEEE80211_NUM_ACS) 1266 n_acs = 1; 1267 1268 spin_lock_irqsave(&local->queue_stop_reason_lock, flags); 1269 if (sdata->vif.cab_queue == IEEE80211_INVAL_HW_QUEUE || 1270 (local->queue_stop_reasons[sdata->vif.cab_queue] == 0 && 1271 skb_queue_empty(&local->pending[sdata->vif.cab_queue]))) { 1272 for (ac = 0; ac < n_acs; ac++) { 1273 int ac_queue = sdata->vif.hw_queue[ac]; 1274 1275 if (local->queue_stop_reasons[ac_queue] == 0 && 1276 skb_queue_empty(&local->pending[ac_queue])) 1277 netif_start_subqueue(dev, ac); 1278 } 1279 } 1280 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); 1281 } 1282 1283 return 0; 1284 err_del_interface: 1285 drv_remove_interface(local, sdata); 1286 err_stop: 1287 if (!local->open_count) 1288 drv_stop(local); 1289 err_del_bss: 1290 sdata->bss = NULL; 1291 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) { 1292 mutex_lock(&local->mtx); 1293 list_del(&sdata->u.vlan.list); 1294 mutex_unlock(&local->mtx); 1295 } 1296 /* might already be clear but that doesn't matter */ 1297 clear_bit(SDATA_STATE_RUNNING, &sdata->state); 1298 return res; 1299 } 1300 1301 static void ieee80211_if_free(struct net_device *dev) 1302 { 1303 free_percpu(dev->tstats); 1304 } 1305 1306 static void ieee80211_if_setup(struct net_device *dev) 1307 { 1308 ether_setup(dev); 1309 dev->priv_flags &= ~IFF_TX_SKB_SHARING; 1310 dev->netdev_ops = &ieee80211_dataif_ops; 1311 dev->needs_free_netdev = true; 1312 dev->priv_destructor = ieee80211_if_free; 1313 } 1314 1315 static void ieee80211_if_setup_no_queue(struct net_device *dev) 1316 { 1317 ieee80211_if_setup(dev); 1318 dev->priv_flags |= IFF_NO_QUEUE; 1319 } 1320 1321 static void ieee80211_iface_work(struct work_struct *work) 1322 { 1323 struct ieee80211_sub_if_data *sdata = 1324 container_of(work, struct ieee80211_sub_if_data, work); 1325 struct ieee80211_local *local = sdata->local; 1326 struct sk_buff *skb; 1327 struct sta_info *sta; 1328 1329 if (!ieee80211_sdata_running(sdata)) 1330 return; 1331 1332 if (test_bit(SCAN_SW_SCANNING, &local->scanning)) 1333 return; 1334 1335 if (!ieee80211_can_run_worker(local)) 1336 return; 1337 1338 /* first process frames */ 1339 while ((skb = skb_dequeue(&sdata->skb_queue))) { 1340 struct ieee80211_mgmt *mgmt = (void *)skb->data; 1341 1342 kcov_remote_start_common(skb_get_kcov_handle(skb)); 1343 if (ieee80211_is_action(mgmt->frame_control) && 1344 mgmt->u.action.category == WLAN_CATEGORY_BACK) { 1345 int len = skb->len; 1346 1347 mutex_lock(&local->sta_mtx); 1348 sta = sta_info_get_bss(sdata, mgmt->sa); 1349 if (sta) { 1350 switch (mgmt->u.action.u.addba_req.action_code) { 1351 case WLAN_ACTION_ADDBA_REQ: 1352 ieee80211_process_addba_request( 1353 local, sta, mgmt, len); 1354 break; 1355 case WLAN_ACTION_ADDBA_RESP: 1356 ieee80211_process_addba_resp(local, sta, 1357 mgmt, len); 1358 break; 1359 case WLAN_ACTION_DELBA: 1360 ieee80211_process_delba(sdata, sta, 1361 mgmt, len); 1362 break; 1363 default: 1364 WARN_ON(1); 1365 break; 1366 } 1367 } 1368 mutex_unlock(&local->sta_mtx); 1369 } else if (ieee80211_is_action(mgmt->frame_control) && 1370 mgmt->u.action.category == WLAN_CATEGORY_VHT) { 1371 switch (mgmt->u.action.u.vht_group_notif.action_code) { 1372 case WLAN_VHT_ACTION_OPMODE_NOTIF: { 1373 struct ieee80211_rx_status *status; 1374 enum nl80211_band band; 1375 u8 opmode; 1376 1377 status = IEEE80211_SKB_RXCB(skb); 1378 band = status->band; 1379 opmode = mgmt->u.action.u.vht_opmode_notif.operating_mode; 1380 1381 mutex_lock(&local->sta_mtx); 1382 sta = sta_info_get_bss(sdata, mgmt->sa); 1383 1384 if (sta) 1385 ieee80211_vht_handle_opmode(sdata, sta, 1386 opmode, 1387 band); 1388 1389 mutex_unlock(&local->sta_mtx); 1390 break; 1391 } 1392 case WLAN_VHT_ACTION_GROUPID_MGMT: 1393 ieee80211_process_mu_groups(sdata, mgmt); 1394 break; 1395 default: 1396 WARN_ON(1); 1397 break; 1398 } 1399 } else if (ieee80211_is_ext(mgmt->frame_control)) { 1400 if (sdata->vif.type == NL80211_IFTYPE_STATION) 1401 ieee80211_sta_rx_queued_ext(sdata, skb); 1402 else 1403 WARN_ON(1); 1404 } else if (ieee80211_is_data_qos(mgmt->frame_control)) { 1405 struct ieee80211_hdr *hdr = (void *)mgmt; 1406 /* 1407 * So the frame isn't mgmt, but frame_control 1408 * is at the right place anyway, of course, so 1409 * the if statement is correct. 1410 * 1411 * Warn if we have other data frame types here, 1412 * they must not get here. 1413 */ 1414 WARN_ON(hdr->frame_control & 1415 cpu_to_le16(IEEE80211_STYPE_NULLFUNC)); 1416 WARN_ON(!(hdr->seq_ctrl & 1417 cpu_to_le16(IEEE80211_SCTL_FRAG))); 1418 /* 1419 * This was a fragment of a frame, received while 1420 * a block-ack session was active. That cannot be 1421 * right, so terminate the session. 1422 */ 1423 mutex_lock(&local->sta_mtx); 1424 sta = sta_info_get_bss(sdata, mgmt->sa); 1425 if (sta) { 1426 u16 tid = ieee80211_get_tid(hdr); 1427 1428 __ieee80211_stop_rx_ba_session( 1429 sta, tid, WLAN_BACK_RECIPIENT, 1430 WLAN_REASON_QSTA_REQUIRE_SETUP, 1431 true); 1432 } 1433 mutex_unlock(&local->sta_mtx); 1434 } else switch (sdata->vif.type) { 1435 case NL80211_IFTYPE_STATION: 1436 ieee80211_sta_rx_queued_mgmt(sdata, skb); 1437 break; 1438 case NL80211_IFTYPE_ADHOC: 1439 ieee80211_ibss_rx_queued_mgmt(sdata, skb); 1440 break; 1441 case NL80211_IFTYPE_MESH_POINT: 1442 if (!ieee80211_vif_is_mesh(&sdata->vif)) 1443 break; 1444 ieee80211_mesh_rx_queued_mgmt(sdata, skb); 1445 break; 1446 default: 1447 WARN(1, "frame for unexpected interface type"); 1448 break; 1449 } 1450 1451 kfree_skb(skb); 1452 kcov_remote_stop(); 1453 } 1454 1455 /* then other type-dependent work */ 1456 switch (sdata->vif.type) { 1457 case NL80211_IFTYPE_STATION: 1458 ieee80211_sta_work(sdata); 1459 break; 1460 case NL80211_IFTYPE_ADHOC: 1461 ieee80211_ibss_work(sdata); 1462 break; 1463 case NL80211_IFTYPE_MESH_POINT: 1464 if (!ieee80211_vif_is_mesh(&sdata->vif)) 1465 break; 1466 ieee80211_mesh_work(sdata); 1467 break; 1468 case NL80211_IFTYPE_OCB: 1469 ieee80211_ocb_work(sdata); 1470 break; 1471 default: 1472 break; 1473 } 1474 } 1475 1476 static void ieee80211_recalc_smps_work(struct work_struct *work) 1477 { 1478 struct ieee80211_sub_if_data *sdata = 1479 container_of(work, struct ieee80211_sub_if_data, recalc_smps); 1480 1481 ieee80211_recalc_smps(sdata); 1482 } 1483 1484 /* 1485 * Helper function to initialise an interface to a specific type. 1486 */ 1487 static void ieee80211_setup_sdata(struct ieee80211_sub_if_data *sdata, 1488 enum nl80211_iftype type) 1489 { 1490 static const u8 bssid_wildcard[ETH_ALEN] = {0xff, 0xff, 0xff, 1491 0xff, 0xff, 0xff}; 1492 1493 /* clear type-dependent union */ 1494 memset(&sdata->u, 0, sizeof(sdata->u)); 1495 1496 /* and set some type-dependent values */ 1497 sdata->vif.type = type; 1498 sdata->vif.p2p = false; 1499 sdata->wdev.iftype = type; 1500 1501 sdata->control_port_protocol = cpu_to_be16(ETH_P_PAE); 1502 sdata->control_port_no_encrypt = false; 1503 sdata->control_port_over_nl80211 = false; 1504 sdata->control_port_no_preauth = false; 1505 sdata->encrypt_headroom = IEEE80211_ENCRYPT_HEADROOM; 1506 sdata->vif.bss_conf.idle = true; 1507 sdata->vif.bss_conf.txpower = INT_MIN; /* unset */ 1508 1509 sdata->noack_map = 0; 1510 1511 /* only monitor/p2p-device differ */ 1512 if (sdata->dev) { 1513 sdata->dev->netdev_ops = &ieee80211_dataif_ops; 1514 sdata->dev->type = ARPHRD_ETHER; 1515 } 1516 1517 skb_queue_head_init(&sdata->skb_queue); 1518 INIT_WORK(&sdata->work, ieee80211_iface_work); 1519 INIT_WORK(&sdata->recalc_smps, ieee80211_recalc_smps_work); 1520 INIT_WORK(&sdata->csa_finalize_work, ieee80211_csa_finalize_work); 1521 INIT_LIST_HEAD(&sdata->assigned_chanctx_list); 1522 INIT_LIST_HEAD(&sdata->reserved_chanctx_list); 1523 1524 switch (type) { 1525 case NL80211_IFTYPE_P2P_GO: 1526 type = NL80211_IFTYPE_AP; 1527 sdata->vif.type = type; 1528 sdata->vif.p2p = true; 1529 fallthrough; 1530 case NL80211_IFTYPE_AP: 1531 skb_queue_head_init(&sdata->u.ap.ps.bc_buf); 1532 INIT_LIST_HEAD(&sdata->u.ap.vlans); 1533 sdata->vif.bss_conf.bssid = sdata->vif.addr; 1534 break; 1535 case NL80211_IFTYPE_P2P_CLIENT: 1536 type = NL80211_IFTYPE_STATION; 1537 sdata->vif.type = type; 1538 sdata->vif.p2p = true; 1539 fallthrough; 1540 case NL80211_IFTYPE_STATION: 1541 sdata->vif.bss_conf.bssid = sdata->u.mgd.bssid; 1542 ieee80211_sta_setup_sdata(sdata); 1543 break; 1544 case NL80211_IFTYPE_OCB: 1545 sdata->vif.bss_conf.bssid = bssid_wildcard; 1546 ieee80211_ocb_setup_sdata(sdata); 1547 break; 1548 case NL80211_IFTYPE_ADHOC: 1549 sdata->vif.bss_conf.bssid = sdata->u.ibss.bssid; 1550 ieee80211_ibss_setup_sdata(sdata); 1551 break; 1552 case NL80211_IFTYPE_MESH_POINT: 1553 if (ieee80211_vif_is_mesh(&sdata->vif)) 1554 ieee80211_mesh_init_sdata(sdata); 1555 break; 1556 case NL80211_IFTYPE_MONITOR: 1557 sdata->dev->type = ARPHRD_IEEE80211_RADIOTAP; 1558 sdata->dev->netdev_ops = &ieee80211_monitorif_ops; 1559 sdata->u.mntr.flags = MONITOR_FLAG_CONTROL | 1560 MONITOR_FLAG_OTHER_BSS; 1561 break; 1562 case NL80211_IFTYPE_NAN: 1563 idr_init(&sdata->u.nan.function_inst_ids); 1564 spin_lock_init(&sdata->u.nan.func_lock); 1565 sdata->vif.bss_conf.bssid = sdata->vif.addr; 1566 break; 1567 case NL80211_IFTYPE_AP_VLAN: 1568 case NL80211_IFTYPE_P2P_DEVICE: 1569 sdata->vif.bss_conf.bssid = sdata->vif.addr; 1570 break; 1571 case NL80211_IFTYPE_UNSPECIFIED: 1572 case NL80211_IFTYPE_WDS: 1573 case NUM_NL80211_IFTYPES: 1574 WARN_ON(1); 1575 break; 1576 } 1577 1578 ieee80211_debugfs_add_netdev(sdata); 1579 } 1580 1581 static int ieee80211_runtime_change_iftype(struct ieee80211_sub_if_data *sdata, 1582 enum nl80211_iftype type) 1583 { 1584 struct ieee80211_local *local = sdata->local; 1585 int ret, err; 1586 enum nl80211_iftype internal_type = type; 1587 bool p2p = false; 1588 1589 ASSERT_RTNL(); 1590 1591 if (!local->ops->change_interface) 1592 return -EBUSY; 1593 1594 switch (sdata->vif.type) { 1595 case NL80211_IFTYPE_AP: 1596 case NL80211_IFTYPE_STATION: 1597 case NL80211_IFTYPE_ADHOC: 1598 case NL80211_IFTYPE_OCB: 1599 /* 1600 * Could maybe also all others here? 1601 * Just not sure how that interacts 1602 * with the RX/config path e.g. for 1603 * mesh. 1604 */ 1605 break; 1606 default: 1607 return -EBUSY; 1608 } 1609 1610 switch (type) { 1611 case NL80211_IFTYPE_AP: 1612 case NL80211_IFTYPE_STATION: 1613 case NL80211_IFTYPE_ADHOC: 1614 case NL80211_IFTYPE_OCB: 1615 /* 1616 * Could probably support everything 1617 * but here. 1618 */ 1619 break; 1620 case NL80211_IFTYPE_P2P_CLIENT: 1621 p2p = true; 1622 internal_type = NL80211_IFTYPE_STATION; 1623 break; 1624 case NL80211_IFTYPE_P2P_GO: 1625 p2p = true; 1626 internal_type = NL80211_IFTYPE_AP; 1627 break; 1628 default: 1629 return -EBUSY; 1630 } 1631 1632 ret = ieee80211_check_concurrent_iface(sdata, internal_type); 1633 if (ret) 1634 return ret; 1635 1636 ieee80211_stop_vif_queues(local, sdata, 1637 IEEE80211_QUEUE_STOP_REASON_IFTYPE_CHANGE); 1638 synchronize_net(); 1639 1640 ieee80211_do_stop(sdata, false); 1641 1642 ieee80211_teardown_sdata(sdata); 1643 1644 ieee80211_set_sdata_offload_flags(sdata); 1645 ret = drv_change_interface(local, sdata, internal_type, p2p); 1646 if (ret) 1647 type = ieee80211_vif_type_p2p(&sdata->vif); 1648 1649 /* 1650 * Ignore return value here, there's not much we can do since 1651 * the driver changed the interface type internally already. 1652 * The warnings will hopefully make driver authors fix it :-) 1653 */ 1654 ieee80211_check_queues(sdata, type); 1655 1656 ieee80211_setup_sdata(sdata, type); 1657 ieee80211_set_vif_encap_ops(sdata); 1658 1659 err = ieee80211_do_open(&sdata->wdev, false); 1660 WARN(err, "type change: do_open returned %d", err); 1661 1662 ieee80211_wake_vif_queues(local, sdata, 1663 IEEE80211_QUEUE_STOP_REASON_IFTYPE_CHANGE); 1664 return ret; 1665 } 1666 1667 int ieee80211_if_change_type(struct ieee80211_sub_if_data *sdata, 1668 enum nl80211_iftype type) 1669 { 1670 int ret; 1671 1672 ASSERT_RTNL(); 1673 1674 if (type == ieee80211_vif_type_p2p(&sdata->vif)) 1675 return 0; 1676 1677 if (ieee80211_sdata_running(sdata)) { 1678 ret = ieee80211_runtime_change_iftype(sdata, type); 1679 if (ret) 1680 return ret; 1681 } else { 1682 /* Purge and reset type-dependent state. */ 1683 ieee80211_teardown_sdata(sdata); 1684 ieee80211_setup_sdata(sdata, type); 1685 } 1686 1687 /* reset some values that shouldn't be kept across type changes */ 1688 if (type == NL80211_IFTYPE_STATION) 1689 sdata->u.mgd.use_4addr = false; 1690 1691 return 0; 1692 } 1693 1694 static void ieee80211_assign_perm_addr(struct ieee80211_local *local, 1695 u8 *perm_addr, enum nl80211_iftype type) 1696 { 1697 struct ieee80211_sub_if_data *sdata; 1698 u64 mask, start, addr, val, inc; 1699 u8 *m; 1700 u8 tmp_addr[ETH_ALEN]; 1701 int i; 1702 1703 /* default ... something at least */ 1704 memcpy(perm_addr, local->hw.wiphy->perm_addr, ETH_ALEN); 1705 1706 if (is_zero_ether_addr(local->hw.wiphy->addr_mask) && 1707 local->hw.wiphy->n_addresses <= 1) 1708 return; 1709 1710 mutex_lock(&local->iflist_mtx); 1711 1712 switch (type) { 1713 case NL80211_IFTYPE_MONITOR: 1714 /* doesn't matter */ 1715 break; 1716 case NL80211_IFTYPE_AP_VLAN: 1717 /* match up with an AP interface */ 1718 list_for_each_entry(sdata, &local->interfaces, list) { 1719 if (sdata->vif.type != NL80211_IFTYPE_AP) 1720 continue; 1721 memcpy(perm_addr, sdata->vif.addr, ETH_ALEN); 1722 break; 1723 } 1724 /* keep default if no AP interface present */ 1725 break; 1726 case NL80211_IFTYPE_P2P_CLIENT: 1727 case NL80211_IFTYPE_P2P_GO: 1728 if (ieee80211_hw_check(&local->hw, P2P_DEV_ADDR_FOR_INTF)) { 1729 list_for_each_entry(sdata, &local->interfaces, list) { 1730 if (sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE) 1731 continue; 1732 if (!ieee80211_sdata_running(sdata)) 1733 continue; 1734 memcpy(perm_addr, sdata->vif.addr, ETH_ALEN); 1735 goto out_unlock; 1736 } 1737 } 1738 fallthrough; 1739 default: 1740 /* assign a new address if possible -- try n_addresses first */ 1741 for (i = 0; i < local->hw.wiphy->n_addresses; i++) { 1742 bool used = false; 1743 1744 list_for_each_entry(sdata, &local->interfaces, list) { 1745 if (ether_addr_equal(local->hw.wiphy->addresses[i].addr, 1746 sdata->vif.addr)) { 1747 used = true; 1748 break; 1749 } 1750 } 1751 1752 if (!used) { 1753 memcpy(perm_addr, 1754 local->hw.wiphy->addresses[i].addr, 1755 ETH_ALEN); 1756 break; 1757 } 1758 } 1759 1760 /* try mask if available */ 1761 if (is_zero_ether_addr(local->hw.wiphy->addr_mask)) 1762 break; 1763 1764 m = local->hw.wiphy->addr_mask; 1765 mask = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) | 1766 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) | 1767 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8); 1768 1769 if (__ffs64(mask) + hweight64(mask) != fls64(mask)) { 1770 /* not a contiguous mask ... not handled now! */ 1771 pr_info("not contiguous\n"); 1772 break; 1773 } 1774 1775 /* 1776 * Pick address of existing interface in case user changed 1777 * MAC address manually, default to perm_addr. 1778 */ 1779 m = local->hw.wiphy->perm_addr; 1780 list_for_each_entry(sdata, &local->interfaces, list) { 1781 if (sdata->vif.type == NL80211_IFTYPE_MONITOR) 1782 continue; 1783 m = sdata->vif.addr; 1784 break; 1785 } 1786 start = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) | 1787 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) | 1788 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8); 1789 1790 inc = 1ULL<<__ffs64(mask); 1791 val = (start & mask); 1792 addr = (start & ~mask) | (val & mask); 1793 do { 1794 bool used = false; 1795 1796 tmp_addr[5] = addr >> 0*8; 1797 tmp_addr[4] = addr >> 1*8; 1798 tmp_addr[3] = addr >> 2*8; 1799 tmp_addr[2] = addr >> 3*8; 1800 tmp_addr[1] = addr >> 4*8; 1801 tmp_addr[0] = addr >> 5*8; 1802 1803 val += inc; 1804 1805 list_for_each_entry(sdata, &local->interfaces, list) { 1806 if (ether_addr_equal(tmp_addr, sdata->vif.addr)) { 1807 used = true; 1808 break; 1809 } 1810 } 1811 1812 if (!used) { 1813 memcpy(perm_addr, tmp_addr, ETH_ALEN); 1814 break; 1815 } 1816 addr = (start & ~mask) | (val & mask); 1817 } while (addr != start); 1818 1819 break; 1820 } 1821 1822 out_unlock: 1823 mutex_unlock(&local->iflist_mtx); 1824 } 1825 1826 int ieee80211_if_add(struct ieee80211_local *local, const char *name, 1827 unsigned char name_assign_type, 1828 struct wireless_dev **new_wdev, enum nl80211_iftype type, 1829 struct vif_params *params) 1830 { 1831 struct net_device *ndev = NULL; 1832 struct ieee80211_sub_if_data *sdata = NULL; 1833 struct txq_info *txqi; 1834 void (*if_setup)(struct net_device *dev); 1835 int ret, i; 1836 int txqs = 1; 1837 1838 ASSERT_RTNL(); 1839 1840 if (type == NL80211_IFTYPE_P2P_DEVICE || type == NL80211_IFTYPE_NAN) { 1841 struct wireless_dev *wdev; 1842 1843 sdata = kzalloc(sizeof(*sdata) + local->hw.vif_data_size, 1844 GFP_KERNEL); 1845 if (!sdata) 1846 return -ENOMEM; 1847 wdev = &sdata->wdev; 1848 1849 sdata->dev = NULL; 1850 strlcpy(sdata->name, name, IFNAMSIZ); 1851 ieee80211_assign_perm_addr(local, wdev->address, type); 1852 memcpy(sdata->vif.addr, wdev->address, ETH_ALEN); 1853 } else { 1854 int size = ALIGN(sizeof(*sdata) + local->hw.vif_data_size, 1855 sizeof(void *)); 1856 int txq_size = 0; 1857 1858 if (local->ops->wake_tx_queue && 1859 type != NL80211_IFTYPE_AP_VLAN && 1860 (type != NL80211_IFTYPE_MONITOR || 1861 (params->flags & MONITOR_FLAG_ACTIVE))) 1862 txq_size += sizeof(struct txq_info) + 1863 local->hw.txq_data_size; 1864 1865 if (local->ops->wake_tx_queue) { 1866 if_setup = ieee80211_if_setup_no_queue; 1867 } else { 1868 if_setup = ieee80211_if_setup; 1869 if (local->hw.queues >= IEEE80211_NUM_ACS) 1870 txqs = IEEE80211_NUM_ACS; 1871 } 1872 1873 ndev = alloc_netdev_mqs(size + txq_size, 1874 name, name_assign_type, 1875 if_setup, txqs, 1); 1876 if (!ndev) 1877 return -ENOMEM; 1878 1879 if (!local->ops->wake_tx_queue && local->hw.wiphy->tx_queue_len) 1880 ndev->tx_queue_len = local->hw.wiphy->tx_queue_len; 1881 1882 dev_net_set(ndev, wiphy_net(local->hw.wiphy)); 1883 1884 ndev->tstats = netdev_alloc_pcpu_stats(struct pcpu_sw_netstats); 1885 if (!ndev->tstats) { 1886 free_netdev(ndev); 1887 return -ENOMEM; 1888 } 1889 1890 ndev->needed_headroom = local->tx_headroom + 1891 4*6 /* four MAC addresses */ 1892 + 2 + 2 + 2 + 2 /* ctl, dur, seq, qos */ 1893 + 6 /* mesh */ 1894 + 8 /* rfc1042/bridge tunnel */ 1895 - ETH_HLEN /* ethernet hard_header_len */ 1896 + IEEE80211_ENCRYPT_HEADROOM; 1897 ndev->needed_tailroom = IEEE80211_ENCRYPT_TAILROOM; 1898 1899 ret = dev_alloc_name(ndev, ndev->name); 1900 if (ret < 0) { 1901 ieee80211_if_free(ndev); 1902 free_netdev(ndev); 1903 return ret; 1904 } 1905 1906 ieee80211_assign_perm_addr(local, ndev->perm_addr, type); 1907 if (is_valid_ether_addr(params->macaddr)) 1908 memcpy(ndev->dev_addr, params->macaddr, ETH_ALEN); 1909 else 1910 memcpy(ndev->dev_addr, ndev->perm_addr, ETH_ALEN); 1911 SET_NETDEV_DEV(ndev, wiphy_dev(local->hw.wiphy)); 1912 1913 /* don't use IEEE80211_DEV_TO_SUB_IF -- it checks too much */ 1914 sdata = netdev_priv(ndev); 1915 ndev->ieee80211_ptr = &sdata->wdev; 1916 memcpy(sdata->vif.addr, ndev->dev_addr, ETH_ALEN); 1917 memcpy(sdata->name, ndev->name, IFNAMSIZ); 1918 1919 if (txq_size) { 1920 txqi = netdev_priv(ndev) + size; 1921 ieee80211_txq_init(sdata, NULL, txqi, 0); 1922 } 1923 1924 sdata->dev = ndev; 1925 } 1926 1927 /* initialise type-independent data */ 1928 sdata->wdev.wiphy = local->hw.wiphy; 1929 sdata->local = local; 1930 1931 for (i = 0; i < IEEE80211_FRAGMENT_MAX; i++) 1932 skb_queue_head_init(&sdata->fragments[i].skb_list); 1933 1934 INIT_LIST_HEAD(&sdata->key_list); 1935 1936 INIT_DELAYED_WORK(&sdata->dfs_cac_timer_work, 1937 ieee80211_dfs_cac_timer_work); 1938 INIT_DELAYED_WORK(&sdata->dec_tailroom_needed_wk, 1939 ieee80211_delayed_tailroom_dec); 1940 1941 for (i = 0; i < NUM_NL80211_BANDS; i++) { 1942 struct ieee80211_supported_band *sband; 1943 sband = local->hw.wiphy->bands[i]; 1944 sdata->rc_rateidx_mask[i] = 1945 sband ? (1 << sband->n_bitrates) - 1 : 0; 1946 if (sband) { 1947 __le16 cap; 1948 u16 *vht_rate_mask; 1949 1950 memcpy(sdata->rc_rateidx_mcs_mask[i], 1951 sband->ht_cap.mcs.rx_mask, 1952 sizeof(sdata->rc_rateidx_mcs_mask[i])); 1953 1954 cap = sband->vht_cap.vht_mcs.rx_mcs_map; 1955 vht_rate_mask = sdata->rc_rateidx_vht_mcs_mask[i]; 1956 ieee80211_get_vht_mask_from_cap(cap, vht_rate_mask); 1957 } else { 1958 memset(sdata->rc_rateidx_mcs_mask[i], 0, 1959 sizeof(sdata->rc_rateidx_mcs_mask[i])); 1960 memset(sdata->rc_rateidx_vht_mcs_mask[i], 0, 1961 sizeof(sdata->rc_rateidx_vht_mcs_mask[i])); 1962 } 1963 } 1964 1965 ieee80211_set_default_queues(sdata); 1966 1967 sdata->ap_power_level = IEEE80211_UNSET_POWER_LEVEL; 1968 sdata->user_power_level = local->user_power_level; 1969 1970 sdata->encrypt_headroom = IEEE80211_ENCRYPT_HEADROOM; 1971 1972 /* setup type-dependent data */ 1973 ieee80211_setup_sdata(sdata, type); 1974 1975 if (ndev) { 1976 ndev->ieee80211_ptr->use_4addr = params->use_4addr; 1977 if (type == NL80211_IFTYPE_STATION) 1978 sdata->u.mgd.use_4addr = params->use_4addr; 1979 1980 ndev->features |= local->hw.netdev_features; 1981 ndev->hw_features |= ndev->features & 1982 MAC80211_SUPPORTED_FEATURES_TX; 1983 1984 netdev_set_default_ethtool_ops(ndev, &ieee80211_ethtool_ops); 1985 1986 /* MTU range: 256 - 2304 */ 1987 ndev->min_mtu = 256; 1988 ndev->max_mtu = local->hw.max_mtu; 1989 1990 ret = cfg80211_register_netdevice(ndev); 1991 if (ret) { 1992 free_netdev(ndev); 1993 return ret; 1994 } 1995 } 1996 1997 mutex_lock(&local->iflist_mtx); 1998 list_add_tail_rcu(&sdata->list, &local->interfaces); 1999 mutex_unlock(&local->iflist_mtx); 2000 2001 if (new_wdev) 2002 *new_wdev = &sdata->wdev; 2003 2004 return 0; 2005 } 2006 2007 void ieee80211_if_remove(struct ieee80211_sub_if_data *sdata) 2008 { 2009 ASSERT_RTNL(); 2010 2011 mutex_lock(&sdata->local->iflist_mtx); 2012 list_del_rcu(&sdata->list); 2013 mutex_unlock(&sdata->local->iflist_mtx); 2014 2015 if (sdata->vif.txq) 2016 ieee80211_txq_purge(sdata->local, to_txq_info(sdata->vif.txq)); 2017 2018 synchronize_rcu(); 2019 2020 cfg80211_unregister_wdev(&sdata->wdev); 2021 2022 if (!sdata->dev) { 2023 ieee80211_teardown_sdata(sdata); 2024 kfree(sdata); 2025 } 2026 } 2027 2028 void ieee80211_sdata_stop(struct ieee80211_sub_if_data *sdata) 2029 { 2030 if (WARN_ON_ONCE(!test_bit(SDATA_STATE_RUNNING, &sdata->state))) 2031 return; 2032 ieee80211_do_stop(sdata, true); 2033 } 2034 2035 void ieee80211_remove_interfaces(struct ieee80211_local *local) 2036 { 2037 struct ieee80211_sub_if_data *sdata, *tmp; 2038 LIST_HEAD(unreg_list); 2039 LIST_HEAD(wdev_list); 2040 2041 ASSERT_RTNL(); 2042 2043 /* Before destroying the interfaces, make sure they're all stopped so 2044 * that the hardware is stopped. Otherwise, the driver might still be 2045 * iterating the interfaces during the shutdown, e.g. from a worker 2046 * or from RX processing or similar, and if it does so (using atomic 2047 * iteration) while we're manipulating the list, the iteration will 2048 * crash. 2049 * 2050 * After this, the hardware should be stopped and the driver should 2051 * have stopped all of its activities, so that we can do RCU-unaware 2052 * manipulations of the interface list below. 2053 */ 2054 cfg80211_shutdown_all_interfaces(local->hw.wiphy); 2055 2056 WARN(local->open_count, "%s: open count remains %d\n", 2057 wiphy_name(local->hw.wiphy), local->open_count); 2058 2059 ieee80211_txq_teardown_flows(local); 2060 2061 mutex_lock(&local->iflist_mtx); 2062 list_for_each_entry_safe(sdata, tmp, &local->interfaces, list) { 2063 list_del(&sdata->list); 2064 2065 if (sdata->dev) 2066 unregister_netdevice_queue(sdata->dev, &unreg_list); 2067 else 2068 list_add(&sdata->list, &wdev_list); 2069 } 2070 mutex_unlock(&local->iflist_mtx); 2071 2072 unregister_netdevice_many(&unreg_list); 2073 2074 wiphy_lock(local->hw.wiphy); 2075 list_for_each_entry_safe(sdata, tmp, &wdev_list, list) { 2076 list_del(&sdata->list); 2077 cfg80211_unregister_wdev(&sdata->wdev); 2078 kfree(sdata); 2079 } 2080 wiphy_unlock(local->hw.wiphy); 2081 } 2082 2083 static int netdev_notify(struct notifier_block *nb, 2084 unsigned long state, void *ptr) 2085 { 2086 struct net_device *dev = netdev_notifier_info_to_dev(ptr); 2087 struct ieee80211_sub_if_data *sdata; 2088 2089 if (state != NETDEV_CHANGENAME) 2090 return NOTIFY_DONE; 2091 2092 if (!dev->ieee80211_ptr || !dev->ieee80211_ptr->wiphy) 2093 return NOTIFY_DONE; 2094 2095 if (dev->ieee80211_ptr->wiphy->privid != mac80211_wiphy_privid) 2096 return NOTIFY_DONE; 2097 2098 sdata = IEEE80211_DEV_TO_SUB_IF(dev); 2099 memcpy(sdata->name, dev->name, IFNAMSIZ); 2100 ieee80211_debugfs_rename_netdev(sdata); 2101 2102 return NOTIFY_OK; 2103 } 2104 2105 static struct notifier_block mac80211_netdev_notifier = { 2106 .notifier_call = netdev_notify, 2107 }; 2108 2109 int ieee80211_iface_init(void) 2110 { 2111 return register_netdevice_notifier(&mac80211_netdev_notifier); 2112 } 2113 2114 void ieee80211_iface_exit(void) 2115 { 2116 unregister_netdevice_notifier(&mac80211_netdev_notifier); 2117 } 2118 2119 void ieee80211_vif_inc_num_mcast(struct ieee80211_sub_if_data *sdata) 2120 { 2121 if (sdata->vif.type == NL80211_IFTYPE_AP) 2122 atomic_inc(&sdata->u.ap.num_mcast_sta); 2123 else if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) 2124 atomic_inc(&sdata->u.vlan.num_mcast_sta); 2125 } 2126 2127 void ieee80211_vif_dec_num_mcast(struct ieee80211_sub_if_data *sdata) 2128 { 2129 if (sdata->vif.type == NL80211_IFTYPE_AP) 2130 atomic_dec(&sdata->u.ap.num_mcast_sta); 2131 else if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) 2132 atomic_dec(&sdata->u.vlan.num_mcast_sta); 2133 } 2134