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) 2018-2022 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 <linux/kcov.h> 19 #include <net/mac80211.h> 20 #include <net/ieee80211_radiotap.h> 21 #include "ieee80211_i.h" 22 #include "sta_info.h" 23 #include "debugfs_netdev.h" 24 #include "mesh.h" 25 #include "led.h" 26 #include "driver-ops.h" 27 #include "wme.h" 28 #include "rate.h" 29 30 /** 31 * DOC: Interface list locking 32 * 33 * The interface list in each struct ieee80211_local is protected 34 * three-fold: 35 * 36 * (1) modifications may only be done under the RTNL 37 * (2) modifications and readers are protected against each other by 38 * the iflist_mtx. 39 * (3) modifications are done in an RCU manner so atomic readers 40 * can traverse the list in RCU-safe blocks. 41 * 42 * As a consequence, reads (traversals) of the list can be protected 43 * by either the RTNL, the iflist_mtx or RCU. 44 */ 45 46 static void ieee80211_iface_work(struct work_struct *work); 47 48 bool __ieee80211_recalc_txpower(struct ieee80211_sub_if_data *sdata) 49 { 50 struct ieee80211_chanctx_conf *chanctx_conf; 51 int power; 52 53 rcu_read_lock(); 54 chanctx_conf = rcu_dereference(sdata->vif.bss_conf.chanctx_conf); 55 if (!chanctx_conf) { 56 rcu_read_unlock(); 57 return false; 58 } 59 60 power = ieee80211_chandef_max_power(&chanctx_conf->def); 61 rcu_read_unlock(); 62 63 if (sdata->deflink.user_power_level != IEEE80211_UNSET_POWER_LEVEL) 64 power = min(power, sdata->deflink.user_power_level); 65 66 if (sdata->deflink.ap_power_level != IEEE80211_UNSET_POWER_LEVEL) 67 power = min(power, sdata->deflink.ap_power_level); 68 69 if (power != sdata->vif.bss_conf.txpower) { 70 sdata->vif.bss_conf.txpower = power; 71 ieee80211_hw_config(sdata->local, 0); 72 return true; 73 } 74 75 return false; 76 } 77 78 void ieee80211_recalc_txpower(struct ieee80211_sub_if_data *sdata, 79 bool update_bss) 80 { 81 if (__ieee80211_recalc_txpower(sdata) || 82 (update_bss && ieee80211_sdata_running(sdata))) 83 ieee80211_link_info_change_notify(sdata, &sdata->deflink, 84 BSS_CHANGED_TXPOWER); 85 } 86 87 static u32 __ieee80211_idle_off(struct ieee80211_local *local) 88 { 89 if (!(local->hw.conf.flags & IEEE80211_CONF_IDLE)) 90 return 0; 91 92 local->hw.conf.flags &= ~IEEE80211_CONF_IDLE; 93 return IEEE80211_CONF_CHANGE_IDLE; 94 } 95 96 static u32 __ieee80211_idle_on(struct ieee80211_local *local) 97 { 98 if (local->hw.conf.flags & IEEE80211_CONF_IDLE) 99 return 0; 100 101 ieee80211_flush_queues(local, NULL, false); 102 103 local->hw.conf.flags |= IEEE80211_CONF_IDLE; 104 return IEEE80211_CONF_CHANGE_IDLE; 105 } 106 107 static u32 __ieee80211_recalc_idle(struct ieee80211_local *local, 108 bool force_active) 109 { 110 bool working, scanning, active; 111 unsigned int led_trig_start = 0, led_trig_stop = 0; 112 113 lockdep_assert_held(&local->mtx); 114 115 active = force_active || 116 !list_empty(&local->chanctx_list) || 117 local->monitors; 118 119 working = !local->ops->remain_on_channel && 120 !list_empty(&local->roc_list); 121 122 scanning = test_bit(SCAN_SW_SCANNING, &local->scanning) || 123 test_bit(SCAN_ONCHANNEL_SCANNING, &local->scanning); 124 125 if (working || scanning) 126 led_trig_start |= IEEE80211_TPT_LEDTRIG_FL_WORK; 127 else 128 led_trig_stop |= IEEE80211_TPT_LEDTRIG_FL_WORK; 129 130 if (active) 131 led_trig_start |= IEEE80211_TPT_LEDTRIG_FL_CONNECTED; 132 else 133 led_trig_stop |= IEEE80211_TPT_LEDTRIG_FL_CONNECTED; 134 135 ieee80211_mod_tpt_led_trig(local, led_trig_start, led_trig_stop); 136 137 if (working || scanning || active) 138 return __ieee80211_idle_off(local); 139 return __ieee80211_idle_on(local); 140 } 141 142 u32 ieee80211_idle_off(struct ieee80211_local *local) 143 { 144 return __ieee80211_recalc_idle(local, true); 145 } 146 147 void ieee80211_recalc_idle(struct ieee80211_local *local) 148 { 149 u32 change = __ieee80211_recalc_idle(local, false); 150 if (change) 151 ieee80211_hw_config(local, change); 152 } 153 154 static int ieee80211_verify_mac(struct ieee80211_sub_if_data *sdata, u8 *addr, 155 bool check_dup) 156 { 157 struct ieee80211_local *local = sdata->local; 158 struct ieee80211_sub_if_data *iter; 159 u64 new, mask, tmp; 160 u8 *m; 161 int ret = 0; 162 163 if (is_zero_ether_addr(local->hw.wiphy->addr_mask)) 164 return 0; 165 166 m = addr; 167 new = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) | 168 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) | 169 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8); 170 171 m = local->hw.wiphy->addr_mask; 172 mask = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) | 173 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) | 174 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8); 175 176 if (!check_dup) 177 return ret; 178 179 mutex_lock(&local->iflist_mtx); 180 list_for_each_entry(iter, &local->interfaces, list) { 181 if (iter == sdata) 182 continue; 183 184 if (iter->vif.type == NL80211_IFTYPE_MONITOR && 185 !(iter->u.mntr.flags & MONITOR_FLAG_ACTIVE)) 186 continue; 187 188 m = iter->vif.addr; 189 tmp = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) | 190 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) | 191 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8); 192 193 if ((new & ~mask) != (tmp & ~mask)) { 194 ret = -EINVAL; 195 break; 196 } 197 } 198 mutex_unlock(&local->iflist_mtx); 199 200 return ret; 201 } 202 203 static int ieee80211_change_mac(struct net_device *dev, void *addr) 204 { 205 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); 206 struct sockaddr *sa = addr; 207 bool check_dup = true; 208 int ret; 209 210 if (ieee80211_sdata_running(sdata)) 211 return -EBUSY; 212 213 if (sdata->vif.type == NL80211_IFTYPE_MONITOR && 214 !(sdata->u.mntr.flags & MONITOR_FLAG_ACTIVE)) 215 check_dup = false; 216 217 ret = ieee80211_verify_mac(sdata, sa->sa_data, check_dup); 218 if (ret) 219 return ret; 220 221 ret = eth_mac_addr(dev, sa); 222 223 if (ret == 0) { 224 memcpy(sdata->vif.addr, sa->sa_data, ETH_ALEN); 225 ether_addr_copy(sdata->vif.bss_conf.addr, sdata->vif.addr); 226 } 227 228 return ret; 229 } 230 231 static inline int identical_mac_addr_allowed(int type1, int type2) 232 { 233 return type1 == NL80211_IFTYPE_MONITOR || 234 type2 == NL80211_IFTYPE_MONITOR || 235 type1 == NL80211_IFTYPE_P2P_DEVICE || 236 type2 == NL80211_IFTYPE_P2P_DEVICE || 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 } 242 243 static 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.bss_conf.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 } 313 314 static 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 } 350 351 static 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 wiphy_lock(sdata->local->hw.wiphy); 365 err = ieee80211_do_open(&sdata->wdev, true); 366 wiphy_unlock(sdata->local->hw.wiphy); 367 368 return err; 369 } 370 371 static void ieee80211_link_setup(struct ieee80211_link_data *link) 372 { 373 if (link->sdata->vif.type == NL80211_IFTYPE_STATION) 374 ieee80211_mgd_setup_link(link); 375 } 376 377 static void ieee80211_link_init(struct ieee80211_sub_if_data *sdata, 378 int link_id, 379 struct ieee80211_link_data *link, 380 struct ieee80211_bss_conf *link_conf) 381 { 382 bool deflink = link_id < 0; 383 384 if (link_id < 0) 385 link_id = 0; 386 387 rcu_assign_pointer(sdata->vif.link_conf[link_id], link_conf); 388 rcu_assign_pointer(sdata->link[link_id], link); 389 390 link->sdata = sdata; 391 link->link_id = link_id; 392 link->conf = link_conf; 393 link_conf->link_id = link_id; 394 395 INIT_WORK(&link->csa_finalize_work, 396 ieee80211_csa_finalize_work); 397 INIT_WORK(&link->color_change_finalize_work, 398 ieee80211_color_change_finalize_work); 399 INIT_LIST_HEAD(&link->assigned_chanctx_list); 400 INIT_LIST_HEAD(&link->reserved_chanctx_list); 401 INIT_DELAYED_WORK(&link->dfs_cac_timer_work, 402 ieee80211_dfs_cac_timer_work); 403 404 if (!deflink) { 405 switch (sdata->vif.type) { 406 case NL80211_IFTYPE_AP: 407 ether_addr_copy(link_conf->addr, 408 sdata->wdev.links[link_id].addr); 409 WARN_ON(!(sdata->wdev.valid_links & BIT(link_id))); 410 break; 411 case NL80211_IFTYPE_STATION: 412 break; 413 default: 414 WARN_ON(1); 415 } 416 } 417 } 418 419 static void ieee80211_link_stop(struct ieee80211_link_data *link) 420 { 421 if (link->sdata->vif.type == NL80211_IFTYPE_STATION) 422 ieee80211_mgd_stop_link(link); 423 424 ieee80211_link_release_channel(link); 425 } 426 427 struct link_container { 428 struct ieee80211_link_data data; 429 struct ieee80211_bss_conf conf; 430 }; 431 432 static void ieee80211_free_links(struct ieee80211_sub_if_data *sdata, 433 struct link_container **links) 434 { 435 unsigned int link_id; 436 437 synchronize_rcu(); 438 439 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) { 440 if (!links[link_id]) 441 continue; 442 ieee80211_link_stop(&links[link_id]->data); 443 kfree(links[link_id]); 444 } 445 } 446 447 static int ieee80211_check_dup_link_addrs(struct ieee80211_sub_if_data *sdata) 448 { 449 unsigned int i, j; 450 451 for (i = 0; i < IEEE80211_MLD_MAX_NUM_LINKS; i++) { 452 struct ieee80211_link_data *link1; 453 454 link1 = sdata_dereference(sdata->link[i], sdata); 455 if (!link1) 456 continue; 457 for (j = i + 1; j < IEEE80211_MLD_MAX_NUM_LINKS; j++) { 458 struct ieee80211_link_data *link2; 459 460 link2 = sdata_dereference(sdata->link[j], sdata); 461 if (!link2) 462 continue; 463 464 if (ether_addr_equal(link1->conf->addr, 465 link2->conf->addr)) 466 return -EALREADY; 467 } 468 } 469 470 return 0; 471 } 472 473 static int ieee80211_vif_update_links(struct ieee80211_sub_if_data *sdata, 474 struct link_container **to_free, 475 u16 new_links) 476 { 477 u16 old_links = sdata->vif.valid_links; 478 unsigned long add = new_links & ~old_links; 479 unsigned long rem = old_links & ~new_links; 480 unsigned int link_id; 481 int ret; 482 struct link_container *links[IEEE80211_MLD_MAX_NUM_LINKS] = {}, *link; 483 struct ieee80211_bss_conf *old[IEEE80211_MLD_MAX_NUM_LINKS]; 484 struct ieee80211_link_data *old_data[IEEE80211_MLD_MAX_NUM_LINKS]; 485 bool use_deflink = old_links == 0; /* set for error case */ 486 487 sdata_assert_lock(sdata); 488 489 memset(to_free, 0, sizeof(links)); 490 491 if (old_links == new_links) 492 return 0; 493 494 /* if there were no old links, need to clear the pointers to deflink */ 495 if (!old_links) 496 rem |= BIT(0); 497 498 /* allocate new link structures first */ 499 for_each_set_bit(link_id, &add, IEEE80211_MLD_MAX_NUM_LINKS) { 500 link = kzalloc(sizeof(*link), GFP_KERNEL); 501 if (!link) { 502 ret = -ENOMEM; 503 goto free; 504 } 505 links[link_id] = link; 506 } 507 508 /* keep track of the old pointers for the driver */ 509 BUILD_BUG_ON(sizeof(old) != sizeof(sdata->vif.link_conf)); 510 memcpy(old, sdata->vif.link_conf, sizeof(old)); 511 /* and for us in error cases */ 512 BUILD_BUG_ON(sizeof(old_data) != sizeof(sdata->link)); 513 memcpy(old_data, sdata->link, sizeof(old_data)); 514 515 /* grab old links to free later */ 516 for_each_set_bit(link_id, &rem, IEEE80211_MLD_MAX_NUM_LINKS) { 517 if (rcu_access_pointer(sdata->link[link_id]) != &sdata->deflink) { 518 /* 519 * we must have allocated the data through this path so 520 * we know we can free both at the same time 521 */ 522 to_free[link_id] = container_of(rcu_access_pointer(sdata->link[link_id]), 523 typeof(*links[link_id]), 524 data); 525 } 526 527 RCU_INIT_POINTER(sdata->link[link_id], NULL); 528 RCU_INIT_POINTER(sdata->vif.link_conf[link_id], NULL); 529 } 530 531 /* link them into data structures */ 532 for_each_set_bit(link_id, &add, IEEE80211_MLD_MAX_NUM_LINKS) { 533 WARN_ON(!use_deflink && 534 rcu_access_pointer(sdata->link[link_id]) == &sdata->deflink); 535 536 link = links[link_id]; 537 ieee80211_link_init(sdata, link_id, &link->data, &link->conf); 538 ieee80211_link_setup(&link->data); 539 } 540 541 if (new_links == 0) 542 ieee80211_link_init(sdata, -1, &sdata->deflink, 543 &sdata->vif.bss_conf); 544 545 sdata->vif.valid_links = new_links; 546 547 ret = ieee80211_check_dup_link_addrs(sdata); 548 if (!ret) { 549 /* tell the driver */ 550 ret = drv_change_vif_links(sdata->local, sdata, 551 old_links, new_links, 552 old); 553 } 554 555 if (ret) { 556 /* restore config */ 557 memcpy(sdata->link, old_data, sizeof(old_data)); 558 memcpy(sdata->vif.link_conf, old, sizeof(old)); 559 sdata->vif.valid_links = old_links; 560 /* and free (only) the newly allocated links */ 561 memset(to_free, 0, sizeof(links)); 562 goto free; 563 } 564 565 /* use deflink/bss_conf again if and only if there are no more links */ 566 use_deflink = new_links == 0; 567 568 goto deinit; 569 free: 570 /* if we failed during allocation, only free all */ 571 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) { 572 kfree(links[link_id]); 573 links[link_id] = NULL; 574 } 575 deinit: 576 if (use_deflink) 577 ieee80211_link_init(sdata, -1, &sdata->deflink, 578 &sdata->vif.bss_conf); 579 return ret; 580 } 581 582 int ieee80211_vif_set_links(struct ieee80211_sub_if_data *sdata, 583 u16 new_links) 584 { 585 struct link_container *links[IEEE80211_MLD_MAX_NUM_LINKS]; 586 int ret; 587 588 ret = ieee80211_vif_update_links(sdata, links, new_links); 589 ieee80211_free_links(sdata, links); 590 591 return ret; 592 } 593 594 static void ieee80211_vif_clear_links(struct ieee80211_sub_if_data *sdata) 595 { 596 struct link_container *links[IEEE80211_MLD_MAX_NUM_LINKS]; 597 598 /* 599 * The locking here is different because when we free links 600 * in the station case we need to be able to cancel_work_sync() 601 * something that also takes the lock. 602 */ 603 604 sdata_lock(sdata); 605 ieee80211_vif_update_links(sdata, links, 0); 606 sdata_unlock(sdata); 607 608 ieee80211_free_links(sdata, links); 609 } 610 611 static void ieee80211_do_stop(struct ieee80211_sub_if_data *sdata, bool going_down) 612 { 613 struct ieee80211_local *local = sdata->local; 614 unsigned long flags; 615 struct sk_buff *skb, *tmp; 616 u32 hw_reconf_flags = 0; 617 int i, flushed; 618 struct ps_data *ps; 619 struct cfg80211_chan_def chandef; 620 bool cancel_scan; 621 struct cfg80211_nan_func *func; 622 623 clear_bit(SDATA_STATE_RUNNING, &sdata->state); 624 synchronize_rcu(); /* flush _ieee80211_wake_txqs() */ 625 626 cancel_scan = rcu_access_pointer(local->scan_sdata) == sdata; 627 if (cancel_scan) 628 ieee80211_scan_cancel(local); 629 630 /* 631 * Stop TX on this interface first. 632 */ 633 if (sdata->dev) 634 netif_tx_stop_all_queues(sdata->dev); 635 636 ieee80211_roc_purge(local, sdata); 637 638 switch (sdata->vif.type) { 639 case NL80211_IFTYPE_STATION: 640 ieee80211_mgd_stop(sdata); 641 break; 642 case NL80211_IFTYPE_ADHOC: 643 ieee80211_ibss_stop(sdata); 644 break; 645 case NL80211_IFTYPE_MONITOR: 646 if (sdata->u.mntr.flags & MONITOR_FLAG_COOK_FRAMES) 647 break; 648 list_del_rcu(&sdata->u.mntr.list); 649 break; 650 default: 651 break; 652 } 653 654 /* 655 * Remove all stations associated with this interface. 656 * 657 * This must be done before calling ops->remove_interface() 658 * because otherwise we can later invoke ops->sta_notify() 659 * whenever the STAs are removed, and that invalidates driver 660 * assumptions about always getting a vif pointer that is valid 661 * (because if we remove a STA after ops->remove_interface() 662 * the driver will have removed the vif info already!) 663 * 664 * For AP_VLANs stations may exist since there's nothing else that 665 * would have removed them, but in other modes there shouldn't 666 * be any stations. 667 */ 668 flushed = sta_info_flush(sdata); 669 WARN_ON_ONCE(sdata->vif.type != NL80211_IFTYPE_AP_VLAN && flushed > 0); 670 671 /* don't count this interface for allmulti while it is down */ 672 if (sdata->flags & IEEE80211_SDATA_ALLMULTI) 673 atomic_dec(&local->iff_allmultis); 674 675 if (sdata->vif.type == NL80211_IFTYPE_AP) { 676 local->fif_pspoll--; 677 local->fif_probe_req--; 678 } else if (sdata->vif.type == NL80211_IFTYPE_ADHOC) { 679 local->fif_probe_req--; 680 } 681 682 if (sdata->dev) { 683 netif_addr_lock_bh(sdata->dev); 684 spin_lock_bh(&local->filter_lock); 685 __hw_addr_unsync(&local->mc_list, &sdata->dev->mc, 686 sdata->dev->addr_len); 687 spin_unlock_bh(&local->filter_lock); 688 netif_addr_unlock_bh(sdata->dev); 689 } 690 691 del_timer_sync(&local->dynamic_ps_timer); 692 cancel_work_sync(&local->dynamic_ps_enable_work); 693 694 cancel_work_sync(&sdata->recalc_smps); 695 696 sdata_lock(sdata); 697 WARN(sdata->vif.valid_links, 698 "destroying interface with valid links 0x%04x\n", 699 sdata->vif.valid_links); 700 701 mutex_lock(&local->mtx); 702 sdata->vif.bss_conf.csa_active = false; 703 if (sdata->vif.type == NL80211_IFTYPE_STATION) 704 sdata->deflink.u.mgd.csa_waiting_bcn = false; 705 if (sdata->deflink.csa_block_tx) { 706 ieee80211_wake_vif_queues(local, sdata, 707 IEEE80211_QUEUE_STOP_REASON_CSA); 708 sdata->deflink.csa_block_tx = false; 709 } 710 mutex_unlock(&local->mtx); 711 sdata_unlock(sdata); 712 713 cancel_work_sync(&sdata->deflink.csa_finalize_work); 714 cancel_work_sync(&sdata->deflink.color_change_finalize_work); 715 716 cancel_delayed_work_sync(&sdata->deflink.dfs_cac_timer_work); 717 718 if (sdata->wdev.cac_started) { 719 chandef = sdata->vif.bss_conf.chandef; 720 WARN_ON(local->suspended); 721 mutex_lock(&local->mtx); 722 ieee80211_link_release_channel(&sdata->deflink); 723 mutex_unlock(&local->mtx); 724 cfg80211_cac_event(sdata->dev, &chandef, 725 NL80211_RADAR_CAC_ABORTED, 726 GFP_KERNEL); 727 } 728 729 if (sdata->vif.type == NL80211_IFTYPE_AP) { 730 WARN_ON(!list_empty(&sdata->u.ap.vlans)); 731 } else if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) { 732 /* remove all packets in parent bc_buf pointing to this dev */ 733 ps = &sdata->bss->ps; 734 735 spin_lock_irqsave(&ps->bc_buf.lock, flags); 736 skb_queue_walk_safe(&ps->bc_buf, skb, tmp) { 737 if (skb->dev == sdata->dev) { 738 __skb_unlink(skb, &ps->bc_buf); 739 local->total_ps_buffered--; 740 ieee80211_free_txskb(&local->hw, skb); 741 } 742 } 743 spin_unlock_irqrestore(&ps->bc_buf.lock, flags); 744 } 745 746 if (going_down) 747 local->open_count--; 748 749 switch (sdata->vif.type) { 750 case NL80211_IFTYPE_AP_VLAN: 751 mutex_lock(&local->mtx); 752 list_del(&sdata->u.vlan.list); 753 mutex_unlock(&local->mtx); 754 RCU_INIT_POINTER(sdata->vif.bss_conf.chanctx_conf, NULL); 755 /* see comment in the default case below */ 756 ieee80211_free_keys(sdata, true); 757 /* no need to tell driver */ 758 break; 759 case NL80211_IFTYPE_MONITOR: 760 if (sdata->u.mntr.flags & MONITOR_FLAG_COOK_FRAMES) { 761 local->cooked_mntrs--; 762 break; 763 } 764 765 local->monitors--; 766 if (local->monitors == 0) { 767 local->hw.conf.flags &= ~IEEE80211_CONF_MONITOR; 768 hw_reconf_flags |= IEEE80211_CONF_CHANGE_MONITOR; 769 } 770 771 ieee80211_adjust_monitor_flags(sdata, -1); 772 break; 773 case NL80211_IFTYPE_NAN: 774 /* clean all the functions */ 775 spin_lock_bh(&sdata->u.nan.func_lock); 776 777 idr_for_each_entry(&sdata->u.nan.function_inst_ids, func, i) { 778 idr_remove(&sdata->u.nan.function_inst_ids, i); 779 cfg80211_free_nan_func(func); 780 } 781 idr_destroy(&sdata->u.nan.function_inst_ids); 782 783 spin_unlock_bh(&sdata->u.nan.func_lock); 784 break; 785 case NL80211_IFTYPE_P2P_DEVICE: 786 /* relies on synchronize_rcu() below */ 787 RCU_INIT_POINTER(local->p2p_sdata, NULL); 788 fallthrough; 789 default: 790 cancel_work_sync(&sdata->work); 791 /* 792 * When we get here, the interface is marked down. 793 * Free the remaining keys, if there are any 794 * (which can happen in AP mode if userspace sets 795 * keys before the interface is operating) 796 * 797 * Force the key freeing to always synchronize_net() 798 * to wait for the RX path in case it is using this 799 * interface enqueuing frames at this very time on 800 * another CPU. 801 */ 802 ieee80211_free_keys(sdata, true); 803 skb_queue_purge(&sdata->skb_queue); 804 skb_queue_purge(&sdata->status_queue); 805 } 806 807 spin_lock_irqsave(&local->queue_stop_reason_lock, flags); 808 for (i = 0; i < IEEE80211_MAX_QUEUES; i++) { 809 skb_queue_walk_safe(&local->pending[i], skb, tmp) { 810 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); 811 if (info->control.vif == &sdata->vif) { 812 __skb_unlink(skb, &local->pending[i]); 813 ieee80211_free_txskb(&local->hw, skb); 814 } 815 } 816 } 817 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); 818 819 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) 820 ieee80211_txq_remove_vlan(local, sdata); 821 822 sdata->bss = NULL; 823 824 if (local->open_count == 0) 825 ieee80211_clear_tx_pending(local); 826 827 sdata->vif.bss_conf.beacon_int = 0; 828 829 /* 830 * If the interface goes down while suspended, presumably because 831 * the device was unplugged and that happens before our resume, 832 * then the driver is already unconfigured and the remainder of 833 * this function isn't needed. 834 * XXX: what about WoWLAN? If the device has software state, e.g. 835 * memory allocated, it might expect teardown commands from 836 * mac80211 here? 837 */ 838 if (local->suspended) { 839 WARN_ON(local->wowlan); 840 WARN_ON(rcu_access_pointer(local->monitor_sdata)); 841 return; 842 } 843 844 switch (sdata->vif.type) { 845 case NL80211_IFTYPE_AP_VLAN: 846 break; 847 case NL80211_IFTYPE_MONITOR: 848 if (local->monitors == 0) 849 ieee80211_del_virtual_monitor(local); 850 851 mutex_lock(&local->mtx); 852 ieee80211_recalc_idle(local); 853 mutex_unlock(&local->mtx); 854 855 if (!(sdata->u.mntr.flags & MONITOR_FLAG_ACTIVE)) 856 break; 857 858 fallthrough; 859 default: 860 if (going_down) 861 drv_remove_interface(local, sdata); 862 } 863 864 ieee80211_recalc_ps(local); 865 866 if (cancel_scan) 867 flush_delayed_work(&local->scan_work); 868 869 if (local->open_count == 0) { 870 ieee80211_stop_device(local); 871 872 /* no reconfiguring after stop! */ 873 return; 874 } 875 876 /* do after stop to avoid reconfiguring when we stop anyway */ 877 ieee80211_configure_filter(local); 878 ieee80211_hw_config(local, hw_reconf_flags); 879 880 if (local->monitors == local->open_count) 881 ieee80211_add_virtual_monitor(local); 882 } 883 884 static void ieee80211_stop_mbssid(struct ieee80211_sub_if_data *sdata) 885 { 886 struct ieee80211_sub_if_data *tx_sdata, *non_tx_sdata, *tmp_sdata; 887 struct ieee80211_vif *tx_vif = sdata->vif.mbssid_tx_vif; 888 889 if (!tx_vif) 890 return; 891 892 tx_sdata = vif_to_sdata(tx_vif); 893 sdata->vif.mbssid_tx_vif = NULL; 894 895 list_for_each_entry_safe(non_tx_sdata, tmp_sdata, 896 &tx_sdata->local->interfaces, list) { 897 if (non_tx_sdata != sdata && non_tx_sdata != tx_sdata && 898 non_tx_sdata->vif.mbssid_tx_vif == tx_vif && 899 ieee80211_sdata_running(non_tx_sdata)) { 900 non_tx_sdata->vif.mbssid_tx_vif = NULL; 901 dev_close(non_tx_sdata->wdev.netdev); 902 } 903 } 904 905 if (sdata != tx_sdata && ieee80211_sdata_running(tx_sdata)) { 906 tx_sdata->vif.mbssid_tx_vif = NULL; 907 dev_close(tx_sdata->wdev.netdev); 908 } 909 } 910 911 static int ieee80211_stop(struct net_device *dev) 912 { 913 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); 914 915 /* close dependent VLAN and MBSSID interfaces before locking wiphy */ 916 if (sdata->vif.type == NL80211_IFTYPE_AP) { 917 struct ieee80211_sub_if_data *vlan, *tmpsdata; 918 919 list_for_each_entry_safe(vlan, tmpsdata, &sdata->u.ap.vlans, 920 u.vlan.list) 921 dev_close(vlan->dev); 922 923 ieee80211_stop_mbssid(sdata); 924 } 925 926 wiphy_lock(sdata->local->hw.wiphy); 927 ieee80211_do_stop(sdata, true); 928 wiphy_unlock(sdata->local->hw.wiphy); 929 930 return 0; 931 } 932 933 static void ieee80211_set_multicast_list(struct net_device *dev) 934 { 935 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); 936 struct ieee80211_local *local = sdata->local; 937 int allmulti, sdata_allmulti; 938 939 allmulti = !!(dev->flags & IFF_ALLMULTI); 940 sdata_allmulti = !!(sdata->flags & IEEE80211_SDATA_ALLMULTI); 941 942 if (allmulti != sdata_allmulti) { 943 if (dev->flags & IFF_ALLMULTI) 944 atomic_inc(&local->iff_allmultis); 945 else 946 atomic_dec(&local->iff_allmultis); 947 sdata->flags ^= IEEE80211_SDATA_ALLMULTI; 948 } 949 950 spin_lock_bh(&local->filter_lock); 951 __hw_addr_sync(&local->mc_list, &dev->mc, dev->addr_len); 952 spin_unlock_bh(&local->filter_lock); 953 ieee80211_queue_work(&local->hw, &local->reconfig_filter); 954 } 955 956 /* 957 * Called when the netdev is removed or, by the code below, before 958 * the interface type changes. 959 */ 960 static void ieee80211_teardown_sdata(struct ieee80211_sub_if_data *sdata) 961 { 962 /* free extra data */ 963 ieee80211_free_keys(sdata, false); 964 965 ieee80211_debugfs_remove_netdev(sdata); 966 967 ieee80211_destroy_frag_cache(&sdata->frags); 968 969 if (ieee80211_vif_is_mesh(&sdata->vif)) 970 ieee80211_mesh_teardown_sdata(sdata); 971 972 ieee80211_vif_clear_links(sdata); 973 ieee80211_link_stop(&sdata->deflink); 974 } 975 976 static void ieee80211_uninit(struct net_device *dev) 977 { 978 ieee80211_teardown_sdata(IEEE80211_DEV_TO_SUB_IF(dev)); 979 } 980 981 static u16 ieee80211_netdev_select_queue(struct net_device *dev, 982 struct sk_buff *skb, 983 struct net_device *sb_dev) 984 { 985 return ieee80211_select_queue(IEEE80211_DEV_TO_SUB_IF(dev), skb); 986 } 987 988 static void 989 ieee80211_get_stats64(struct net_device *dev, struct rtnl_link_stats64 *stats) 990 { 991 dev_fetch_sw_netstats(stats, dev->tstats); 992 } 993 994 static const struct net_device_ops ieee80211_dataif_ops = { 995 .ndo_open = ieee80211_open, 996 .ndo_stop = ieee80211_stop, 997 .ndo_uninit = ieee80211_uninit, 998 .ndo_start_xmit = ieee80211_subif_start_xmit, 999 .ndo_set_rx_mode = ieee80211_set_multicast_list, 1000 .ndo_set_mac_address = ieee80211_change_mac, 1001 .ndo_select_queue = ieee80211_netdev_select_queue, 1002 .ndo_get_stats64 = ieee80211_get_stats64, 1003 }; 1004 1005 static u16 ieee80211_monitor_select_queue(struct net_device *dev, 1006 struct sk_buff *skb, 1007 struct net_device *sb_dev) 1008 { 1009 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); 1010 struct ieee80211_local *local = sdata->local; 1011 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); 1012 struct ieee80211_hdr *hdr; 1013 int len_rthdr; 1014 1015 if (local->hw.queues < IEEE80211_NUM_ACS) 1016 return 0; 1017 1018 /* reset flags and info before parsing radiotap header */ 1019 memset(info, 0, sizeof(*info)); 1020 1021 if (!ieee80211_parse_tx_radiotap(skb, dev)) 1022 return 0; /* doesn't matter, frame will be dropped */ 1023 1024 len_rthdr = ieee80211_get_radiotap_len(skb->data); 1025 hdr = (struct ieee80211_hdr *)(skb->data + len_rthdr); 1026 if (skb->len < len_rthdr + 2 || 1027 skb->len < len_rthdr + ieee80211_hdrlen(hdr->frame_control)) 1028 return 0; /* doesn't matter, frame will be dropped */ 1029 1030 return ieee80211_select_queue_80211(sdata, skb, hdr); 1031 } 1032 1033 static const struct net_device_ops ieee80211_monitorif_ops = { 1034 .ndo_open = ieee80211_open, 1035 .ndo_stop = ieee80211_stop, 1036 .ndo_uninit = ieee80211_uninit, 1037 .ndo_start_xmit = ieee80211_monitor_start_xmit, 1038 .ndo_set_rx_mode = ieee80211_set_multicast_list, 1039 .ndo_set_mac_address = ieee80211_change_mac, 1040 .ndo_select_queue = ieee80211_monitor_select_queue, 1041 .ndo_get_stats64 = ieee80211_get_stats64, 1042 }; 1043 1044 static int ieee80211_netdev_fill_forward_path(struct net_device_path_ctx *ctx, 1045 struct net_device_path *path) 1046 { 1047 struct ieee80211_sub_if_data *sdata; 1048 struct ieee80211_local *local; 1049 struct sta_info *sta; 1050 int ret = -ENOENT; 1051 1052 sdata = IEEE80211_DEV_TO_SUB_IF(ctx->dev); 1053 local = sdata->local; 1054 1055 if (!local->ops->net_fill_forward_path) 1056 return -EOPNOTSUPP; 1057 1058 rcu_read_lock(); 1059 switch (sdata->vif.type) { 1060 case NL80211_IFTYPE_AP_VLAN: 1061 sta = rcu_dereference(sdata->u.vlan.sta); 1062 if (sta) 1063 break; 1064 if (sdata->wdev.use_4addr) 1065 goto out; 1066 if (is_multicast_ether_addr(ctx->daddr)) 1067 goto out; 1068 sta = sta_info_get_bss(sdata, ctx->daddr); 1069 break; 1070 case NL80211_IFTYPE_AP: 1071 if (is_multicast_ether_addr(ctx->daddr)) 1072 goto out; 1073 sta = sta_info_get(sdata, ctx->daddr); 1074 break; 1075 case NL80211_IFTYPE_STATION: 1076 if (sdata->wdev.wiphy->flags & WIPHY_FLAG_SUPPORTS_TDLS) { 1077 sta = sta_info_get(sdata, ctx->daddr); 1078 if (sta && test_sta_flag(sta, WLAN_STA_TDLS_PEER)) { 1079 if (!test_sta_flag(sta, WLAN_STA_TDLS_PEER_AUTH)) 1080 goto out; 1081 1082 break; 1083 } 1084 } 1085 1086 sta = sta_info_get(sdata, sdata->deflink.u.mgd.bssid); 1087 break; 1088 default: 1089 goto out; 1090 } 1091 1092 if (!sta) 1093 goto out; 1094 1095 ret = drv_net_fill_forward_path(local, sdata, &sta->sta, ctx, path); 1096 out: 1097 rcu_read_unlock(); 1098 1099 return ret; 1100 } 1101 1102 static const struct net_device_ops ieee80211_dataif_8023_ops = { 1103 .ndo_open = ieee80211_open, 1104 .ndo_stop = ieee80211_stop, 1105 .ndo_uninit = ieee80211_uninit, 1106 .ndo_start_xmit = ieee80211_subif_start_xmit_8023, 1107 .ndo_set_rx_mode = ieee80211_set_multicast_list, 1108 .ndo_set_mac_address = ieee80211_change_mac, 1109 .ndo_select_queue = ieee80211_netdev_select_queue, 1110 .ndo_get_stats64 = ieee80211_get_stats64, 1111 .ndo_fill_forward_path = ieee80211_netdev_fill_forward_path, 1112 }; 1113 1114 static bool ieee80211_iftype_supports_hdr_offload(enum nl80211_iftype iftype) 1115 { 1116 switch (iftype) { 1117 /* P2P GO and client are mapped to AP/STATION types */ 1118 case NL80211_IFTYPE_AP: 1119 case NL80211_IFTYPE_STATION: 1120 return true; 1121 default: 1122 return false; 1123 } 1124 } 1125 1126 static bool ieee80211_set_sdata_offload_flags(struct ieee80211_sub_if_data *sdata) 1127 { 1128 struct ieee80211_local *local = sdata->local; 1129 u32 flags; 1130 1131 flags = sdata->vif.offload_flags; 1132 1133 if (ieee80211_hw_check(&local->hw, SUPPORTS_TX_ENCAP_OFFLOAD) && 1134 ieee80211_iftype_supports_hdr_offload(sdata->vif.type)) { 1135 flags |= IEEE80211_OFFLOAD_ENCAP_ENABLED; 1136 1137 if (!ieee80211_hw_check(&local->hw, SUPPORTS_TX_FRAG) && 1138 local->hw.wiphy->frag_threshold != (u32)-1) 1139 flags &= ~IEEE80211_OFFLOAD_ENCAP_ENABLED; 1140 1141 if (local->monitors) 1142 flags &= ~IEEE80211_OFFLOAD_ENCAP_ENABLED; 1143 } else { 1144 flags &= ~IEEE80211_OFFLOAD_ENCAP_ENABLED; 1145 } 1146 1147 if (ieee80211_hw_check(&local->hw, SUPPORTS_RX_DECAP_OFFLOAD) && 1148 ieee80211_iftype_supports_hdr_offload(sdata->vif.type)) { 1149 flags |= IEEE80211_OFFLOAD_DECAP_ENABLED; 1150 1151 if (local->monitors && 1152 !ieee80211_hw_check(&local->hw, SUPPORTS_CONC_MON_RX_DECAP)) 1153 flags &= ~IEEE80211_OFFLOAD_DECAP_ENABLED; 1154 } else { 1155 flags &= ~IEEE80211_OFFLOAD_DECAP_ENABLED; 1156 } 1157 1158 if (sdata->vif.offload_flags == flags) 1159 return false; 1160 1161 sdata->vif.offload_flags = flags; 1162 ieee80211_check_fast_rx_iface(sdata); 1163 return true; 1164 } 1165 1166 static void ieee80211_set_vif_encap_ops(struct ieee80211_sub_if_data *sdata) 1167 { 1168 struct ieee80211_local *local = sdata->local; 1169 struct ieee80211_sub_if_data *bss = sdata; 1170 bool enabled; 1171 1172 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) { 1173 if (!sdata->bss) 1174 return; 1175 1176 bss = container_of(sdata->bss, struct ieee80211_sub_if_data, u.ap); 1177 } 1178 1179 if (!ieee80211_hw_check(&local->hw, SUPPORTS_TX_ENCAP_OFFLOAD) || 1180 !ieee80211_iftype_supports_hdr_offload(bss->vif.type)) 1181 return; 1182 1183 enabled = bss->vif.offload_flags & IEEE80211_OFFLOAD_ENCAP_ENABLED; 1184 if (sdata->wdev.use_4addr && 1185 !(bss->vif.offload_flags & IEEE80211_OFFLOAD_ENCAP_4ADDR)) 1186 enabled = false; 1187 1188 sdata->dev->netdev_ops = enabled ? &ieee80211_dataif_8023_ops : 1189 &ieee80211_dataif_ops; 1190 } 1191 1192 static void ieee80211_recalc_sdata_offload(struct ieee80211_sub_if_data *sdata) 1193 { 1194 struct ieee80211_local *local = sdata->local; 1195 struct ieee80211_sub_if_data *vsdata; 1196 1197 if (ieee80211_set_sdata_offload_flags(sdata)) { 1198 drv_update_vif_offload(local, sdata); 1199 ieee80211_set_vif_encap_ops(sdata); 1200 } 1201 1202 list_for_each_entry(vsdata, &local->interfaces, list) { 1203 if (vsdata->vif.type != NL80211_IFTYPE_AP_VLAN || 1204 vsdata->bss != &sdata->u.ap) 1205 continue; 1206 1207 ieee80211_set_vif_encap_ops(vsdata); 1208 } 1209 } 1210 1211 void ieee80211_recalc_offload(struct ieee80211_local *local) 1212 { 1213 struct ieee80211_sub_if_data *sdata; 1214 1215 if (!ieee80211_hw_check(&local->hw, SUPPORTS_TX_ENCAP_OFFLOAD)) 1216 return; 1217 1218 mutex_lock(&local->iflist_mtx); 1219 1220 list_for_each_entry(sdata, &local->interfaces, list) { 1221 if (!ieee80211_sdata_running(sdata)) 1222 continue; 1223 1224 ieee80211_recalc_sdata_offload(sdata); 1225 } 1226 1227 mutex_unlock(&local->iflist_mtx); 1228 } 1229 1230 void ieee80211_adjust_monitor_flags(struct ieee80211_sub_if_data *sdata, 1231 const int offset) 1232 { 1233 struct ieee80211_local *local = sdata->local; 1234 u32 flags = sdata->u.mntr.flags; 1235 1236 #define ADJUST(_f, _s) do { \ 1237 if (flags & MONITOR_FLAG_##_f) \ 1238 local->fif_##_s += offset; \ 1239 } while (0) 1240 1241 ADJUST(FCSFAIL, fcsfail); 1242 ADJUST(PLCPFAIL, plcpfail); 1243 ADJUST(CONTROL, control); 1244 ADJUST(CONTROL, pspoll); 1245 ADJUST(OTHER_BSS, other_bss); 1246 1247 #undef ADJUST 1248 } 1249 1250 static void ieee80211_set_default_queues(struct ieee80211_sub_if_data *sdata) 1251 { 1252 struct ieee80211_local *local = sdata->local; 1253 int i; 1254 1255 for (i = 0; i < IEEE80211_NUM_ACS; i++) { 1256 if (ieee80211_hw_check(&local->hw, QUEUE_CONTROL)) 1257 sdata->vif.hw_queue[i] = IEEE80211_INVAL_HW_QUEUE; 1258 else if (local->hw.queues >= IEEE80211_NUM_ACS) 1259 sdata->vif.hw_queue[i] = i; 1260 else 1261 sdata->vif.hw_queue[i] = 0; 1262 } 1263 sdata->vif.cab_queue = IEEE80211_INVAL_HW_QUEUE; 1264 } 1265 1266 static void ieee80211_sdata_init(struct ieee80211_local *local, 1267 struct ieee80211_sub_if_data *sdata) 1268 { 1269 sdata->local = local; 1270 1271 /* 1272 * Initialize the default link, so we can use link_id 0 for non-MLD, 1273 * and that continues to work for non-MLD-aware drivers that use just 1274 * vif.bss_conf instead of vif.link_conf. 1275 * 1276 * Note that we never change this, so if link ID 0 isn't used in an 1277 * MLD connection, we get a separate allocation for it. 1278 */ 1279 ieee80211_link_init(sdata, -1, &sdata->deflink, &sdata->vif.bss_conf); 1280 } 1281 1282 int ieee80211_add_virtual_monitor(struct ieee80211_local *local) 1283 { 1284 struct ieee80211_sub_if_data *sdata; 1285 int ret; 1286 1287 if (!ieee80211_hw_check(&local->hw, WANT_MONITOR_VIF)) 1288 return 0; 1289 1290 ASSERT_RTNL(); 1291 lockdep_assert_wiphy(local->hw.wiphy); 1292 1293 if (local->monitor_sdata) 1294 return 0; 1295 1296 sdata = kzalloc(sizeof(*sdata) + local->hw.vif_data_size, GFP_KERNEL); 1297 if (!sdata) 1298 return -ENOMEM; 1299 1300 /* set up data */ 1301 sdata->vif.type = NL80211_IFTYPE_MONITOR; 1302 snprintf(sdata->name, IFNAMSIZ, "%s-monitor", 1303 wiphy_name(local->hw.wiphy)); 1304 sdata->wdev.iftype = NL80211_IFTYPE_MONITOR; 1305 1306 ieee80211_sdata_init(local, sdata); 1307 1308 ieee80211_set_default_queues(sdata); 1309 1310 ret = drv_add_interface(local, sdata); 1311 if (WARN_ON(ret)) { 1312 /* ok .. stupid driver, it asked for this! */ 1313 kfree(sdata); 1314 return ret; 1315 } 1316 1317 set_bit(SDATA_STATE_RUNNING, &sdata->state); 1318 1319 ret = ieee80211_check_queues(sdata, NL80211_IFTYPE_MONITOR); 1320 if (ret) { 1321 kfree(sdata); 1322 return ret; 1323 } 1324 1325 mutex_lock(&local->iflist_mtx); 1326 rcu_assign_pointer(local->monitor_sdata, sdata); 1327 mutex_unlock(&local->iflist_mtx); 1328 1329 mutex_lock(&local->mtx); 1330 ret = ieee80211_link_use_channel(&sdata->deflink, &local->monitor_chandef, 1331 IEEE80211_CHANCTX_EXCLUSIVE); 1332 mutex_unlock(&local->mtx); 1333 if (ret) { 1334 mutex_lock(&local->iflist_mtx); 1335 RCU_INIT_POINTER(local->monitor_sdata, NULL); 1336 mutex_unlock(&local->iflist_mtx); 1337 synchronize_net(); 1338 drv_remove_interface(local, sdata); 1339 kfree(sdata); 1340 return ret; 1341 } 1342 1343 skb_queue_head_init(&sdata->skb_queue); 1344 skb_queue_head_init(&sdata->status_queue); 1345 INIT_WORK(&sdata->work, ieee80211_iface_work); 1346 1347 return 0; 1348 } 1349 1350 void ieee80211_del_virtual_monitor(struct ieee80211_local *local) 1351 { 1352 struct ieee80211_sub_if_data *sdata; 1353 1354 if (!ieee80211_hw_check(&local->hw, WANT_MONITOR_VIF)) 1355 return; 1356 1357 ASSERT_RTNL(); 1358 lockdep_assert_wiphy(local->hw.wiphy); 1359 1360 mutex_lock(&local->iflist_mtx); 1361 1362 sdata = rcu_dereference_protected(local->monitor_sdata, 1363 lockdep_is_held(&local->iflist_mtx)); 1364 if (!sdata) { 1365 mutex_unlock(&local->iflist_mtx); 1366 return; 1367 } 1368 1369 RCU_INIT_POINTER(local->monitor_sdata, NULL); 1370 mutex_unlock(&local->iflist_mtx); 1371 1372 synchronize_net(); 1373 1374 mutex_lock(&local->mtx); 1375 ieee80211_link_release_channel(&sdata->deflink); 1376 mutex_unlock(&local->mtx); 1377 1378 drv_remove_interface(local, sdata); 1379 1380 kfree(sdata); 1381 } 1382 1383 /* 1384 * NOTE: Be very careful when changing this function, it must NOT return 1385 * an error on interface type changes that have been pre-checked, so most 1386 * checks should be in ieee80211_check_concurrent_iface. 1387 */ 1388 int ieee80211_do_open(struct wireless_dev *wdev, bool coming_up) 1389 { 1390 struct ieee80211_sub_if_data *sdata = IEEE80211_WDEV_TO_SUB_IF(wdev); 1391 struct net_device *dev = wdev->netdev; 1392 struct ieee80211_local *local = sdata->local; 1393 u32 changed = 0; 1394 int res; 1395 u32 hw_reconf_flags = 0; 1396 1397 switch (sdata->vif.type) { 1398 case NL80211_IFTYPE_AP_VLAN: { 1399 struct ieee80211_sub_if_data *master; 1400 1401 if (!sdata->bss) 1402 return -ENOLINK; 1403 1404 mutex_lock(&local->mtx); 1405 list_add(&sdata->u.vlan.list, &sdata->bss->vlans); 1406 mutex_unlock(&local->mtx); 1407 1408 master = container_of(sdata->bss, 1409 struct ieee80211_sub_if_data, u.ap); 1410 sdata->control_port_protocol = 1411 master->control_port_protocol; 1412 sdata->control_port_no_encrypt = 1413 master->control_port_no_encrypt; 1414 sdata->control_port_over_nl80211 = 1415 master->control_port_over_nl80211; 1416 sdata->control_port_no_preauth = 1417 master->control_port_no_preauth; 1418 sdata->vif.cab_queue = master->vif.cab_queue; 1419 memcpy(sdata->vif.hw_queue, master->vif.hw_queue, 1420 sizeof(sdata->vif.hw_queue)); 1421 sdata->vif.bss_conf.chandef = master->vif.bss_conf.chandef; 1422 1423 mutex_lock(&local->key_mtx); 1424 sdata->crypto_tx_tailroom_needed_cnt += 1425 master->crypto_tx_tailroom_needed_cnt; 1426 mutex_unlock(&local->key_mtx); 1427 1428 break; 1429 } 1430 case NL80211_IFTYPE_AP: 1431 sdata->bss = &sdata->u.ap; 1432 break; 1433 case NL80211_IFTYPE_MESH_POINT: 1434 case NL80211_IFTYPE_STATION: 1435 case NL80211_IFTYPE_MONITOR: 1436 case NL80211_IFTYPE_ADHOC: 1437 case NL80211_IFTYPE_P2P_DEVICE: 1438 case NL80211_IFTYPE_OCB: 1439 case NL80211_IFTYPE_NAN: 1440 /* no special treatment */ 1441 break; 1442 case NL80211_IFTYPE_UNSPECIFIED: 1443 case NUM_NL80211_IFTYPES: 1444 case NL80211_IFTYPE_P2P_CLIENT: 1445 case NL80211_IFTYPE_P2P_GO: 1446 case NL80211_IFTYPE_WDS: 1447 /* cannot happen */ 1448 WARN_ON(1); 1449 break; 1450 } 1451 1452 if (local->open_count == 0) { 1453 res = drv_start(local); 1454 if (res) 1455 goto err_del_bss; 1456 /* we're brought up, everything changes */ 1457 hw_reconf_flags = ~0; 1458 ieee80211_led_radio(local, true); 1459 ieee80211_mod_tpt_led_trig(local, 1460 IEEE80211_TPT_LEDTRIG_FL_RADIO, 0); 1461 } 1462 1463 /* 1464 * Copy the hopefully now-present MAC address to 1465 * this interface, if it has the special null one. 1466 */ 1467 if (dev && is_zero_ether_addr(dev->dev_addr)) { 1468 eth_hw_addr_set(dev, local->hw.wiphy->perm_addr); 1469 memcpy(dev->perm_addr, dev->dev_addr, ETH_ALEN); 1470 1471 if (!is_valid_ether_addr(dev->dev_addr)) { 1472 res = -EADDRNOTAVAIL; 1473 goto err_stop; 1474 } 1475 } 1476 1477 switch (sdata->vif.type) { 1478 case NL80211_IFTYPE_AP_VLAN: 1479 /* no need to tell driver, but set carrier and chanctx */ 1480 if (sdata->bss->active) { 1481 ieee80211_link_vlan_copy_chanctx(&sdata->deflink); 1482 netif_carrier_on(dev); 1483 ieee80211_set_vif_encap_ops(sdata); 1484 } else { 1485 netif_carrier_off(dev); 1486 } 1487 break; 1488 case NL80211_IFTYPE_MONITOR: 1489 if (sdata->u.mntr.flags & MONITOR_FLAG_COOK_FRAMES) { 1490 local->cooked_mntrs++; 1491 break; 1492 } 1493 1494 if (sdata->u.mntr.flags & MONITOR_FLAG_ACTIVE) { 1495 res = drv_add_interface(local, sdata); 1496 if (res) 1497 goto err_stop; 1498 } else if (local->monitors == 0 && local->open_count == 0) { 1499 res = ieee80211_add_virtual_monitor(local); 1500 if (res) 1501 goto err_stop; 1502 } 1503 1504 /* must be before the call to ieee80211_configure_filter */ 1505 local->monitors++; 1506 if (local->monitors == 1) { 1507 local->hw.conf.flags |= IEEE80211_CONF_MONITOR; 1508 hw_reconf_flags |= IEEE80211_CONF_CHANGE_MONITOR; 1509 } 1510 1511 ieee80211_adjust_monitor_flags(sdata, 1); 1512 ieee80211_configure_filter(local); 1513 ieee80211_recalc_offload(local); 1514 mutex_lock(&local->mtx); 1515 ieee80211_recalc_idle(local); 1516 mutex_unlock(&local->mtx); 1517 1518 netif_carrier_on(dev); 1519 break; 1520 default: 1521 if (coming_up) { 1522 ieee80211_del_virtual_monitor(local); 1523 ieee80211_set_sdata_offload_flags(sdata); 1524 1525 res = drv_add_interface(local, sdata); 1526 if (res) 1527 goto err_stop; 1528 1529 ieee80211_set_vif_encap_ops(sdata); 1530 res = ieee80211_check_queues(sdata, 1531 ieee80211_vif_type_p2p(&sdata->vif)); 1532 if (res) 1533 goto err_del_interface; 1534 } 1535 1536 if (sdata->vif.type == NL80211_IFTYPE_AP) { 1537 local->fif_pspoll++; 1538 local->fif_probe_req++; 1539 1540 ieee80211_configure_filter(local); 1541 } else if (sdata->vif.type == NL80211_IFTYPE_ADHOC) { 1542 local->fif_probe_req++; 1543 } 1544 1545 if (sdata->vif.probe_req_reg) 1546 drv_config_iface_filter(local, sdata, 1547 FIF_PROBE_REQ, 1548 FIF_PROBE_REQ); 1549 1550 if (sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE && 1551 sdata->vif.type != NL80211_IFTYPE_NAN) 1552 changed |= ieee80211_reset_erp_info(sdata); 1553 ieee80211_link_info_change_notify(sdata, &sdata->deflink, 1554 changed); 1555 1556 switch (sdata->vif.type) { 1557 case NL80211_IFTYPE_STATION: 1558 case NL80211_IFTYPE_ADHOC: 1559 case NL80211_IFTYPE_AP: 1560 case NL80211_IFTYPE_MESH_POINT: 1561 case NL80211_IFTYPE_OCB: 1562 netif_carrier_off(dev); 1563 break; 1564 case NL80211_IFTYPE_P2P_DEVICE: 1565 case NL80211_IFTYPE_NAN: 1566 break; 1567 default: 1568 /* not reached */ 1569 WARN_ON(1); 1570 } 1571 1572 /* 1573 * Set default queue parameters so drivers don't 1574 * need to initialise the hardware if the hardware 1575 * doesn't start up with sane defaults. 1576 * Enable QoS for anything but station interfaces. 1577 */ 1578 ieee80211_set_wmm_default(&sdata->deflink, true, 1579 sdata->vif.type != NL80211_IFTYPE_STATION); 1580 } 1581 1582 set_bit(SDATA_STATE_RUNNING, &sdata->state); 1583 1584 switch (sdata->vif.type) { 1585 case NL80211_IFTYPE_P2P_DEVICE: 1586 rcu_assign_pointer(local->p2p_sdata, sdata); 1587 break; 1588 case NL80211_IFTYPE_MONITOR: 1589 if (sdata->u.mntr.flags & MONITOR_FLAG_COOK_FRAMES) 1590 break; 1591 list_add_tail_rcu(&sdata->u.mntr.list, &local->mon_list); 1592 break; 1593 default: 1594 break; 1595 } 1596 1597 /* 1598 * set_multicast_list will be invoked by the networking core 1599 * which will check whether any increments here were done in 1600 * error and sync them down to the hardware as filter flags. 1601 */ 1602 if (sdata->flags & IEEE80211_SDATA_ALLMULTI) 1603 atomic_inc(&local->iff_allmultis); 1604 1605 if (coming_up) 1606 local->open_count++; 1607 1608 if (hw_reconf_flags) 1609 ieee80211_hw_config(local, hw_reconf_flags); 1610 1611 ieee80211_recalc_ps(local); 1612 1613 if (sdata->vif.type == NL80211_IFTYPE_MONITOR || 1614 sdata->vif.type == NL80211_IFTYPE_AP_VLAN || 1615 local->ops->wake_tx_queue) { 1616 /* XXX: for AP_VLAN, actually track AP queues */ 1617 if (dev) 1618 netif_tx_start_all_queues(dev); 1619 } else if (dev) { 1620 unsigned long flags; 1621 int n_acs = IEEE80211_NUM_ACS; 1622 int ac; 1623 1624 if (local->hw.queues < IEEE80211_NUM_ACS) 1625 n_acs = 1; 1626 1627 spin_lock_irqsave(&local->queue_stop_reason_lock, flags); 1628 if (sdata->vif.cab_queue == IEEE80211_INVAL_HW_QUEUE || 1629 (local->queue_stop_reasons[sdata->vif.cab_queue] == 0 && 1630 skb_queue_empty(&local->pending[sdata->vif.cab_queue]))) { 1631 for (ac = 0; ac < n_acs; ac++) { 1632 int ac_queue = sdata->vif.hw_queue[ac]; 1633 1634 if (local->queue_stop_reasons[ac_queue] == 0 && 1635 skb_queue_empty(&local->pending[ac_queue])) 1636 netif_start_subqueue(dev, ac); 1637 } 1638 } 1639 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); 1640 } 1641 1642 return 0; 1643 err_del_interface: 1644 drv_remove_interface(local, sdata); 1645 err_stop: 1646 if (!local->open_count) 1647 drv_stop(local); 1648 err_del_bss: 1649 sdata->bss = NULL; 1650 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) { 1651 mutex_lock(&local->mtx); 1652 list_del(&sdata->u.vlan.list); 1653 mutex_unlock(&local->mtx); 1654 } 1655 /* might already be clear but that doesn't matter */ 1656 clear_bit(SDATA_STATE_RUNNING, &sdata->state); 1657 return res; 1658 } 1659 1660 static void ieee80211_if_free(struct net_device *dev) 1661 { 1662 free_percpu(dev->tstats); 1663 } 1664 1665 static void ieee80211_if_setup(struct net_device *dev) 1666 { 1667 ether_setup(dev); 1668 dev->priv_flags &= ~IFF_TX_SKB_SHARING; 1669 dev->netdev_ops = &ieee80211_dataif_ops; 1670 dev->needs_free_netdev = true; 1671 dev->priv_destructor = ieee80211_if_free; 1672 } 1673 1674 static void ieee80211_if_setup_no_queue(struct net_device *dev) 1675 { 1676 ieee80211_if_setup(dev); 1677 dev->priv_flags |= IFF_NO_QUEUE; 1678 } 1679 1680 static void ieee80211_iface_process_skb(struct ieee80211_local *local, 1681 struct ieee80211_sub_if_data *sdata, 1682 struct sk_buff *skb) 1683 { 1684 struct ieee80211_mgmt *mgmt = (void *)skb->data; 1685 1686 if (ieee80211_is_action(mgmt->frame_control) && 1687 mgmt->u.action.category == WLAN_CATEGORY_BACK) { 1688 struct sta_info *sta; 1689 int len = skb->len; 1690 1691 mutex_lock(&local->sta_mtx); 1692 sta = sta_info_get_bss(sdata, mgmt->sa); 1693 if (sta) { 1694 switch (mgmt->u.action.u.addba_req.action_code) { 1695 case WLAN_ACTION_ADDBA_REQ: 1696 ieee80211_process_addba_request(local, sta, 1697 mgmt, len); 1698 break; 1699 case WLAN_ACTION_ADDBA_RESP: 1700 ieee80211_process_addba_resp(local, sta, 1701 mgmt, len); 1702 break; 1703 case WLAN_ACTION_DELBA: 1704 ieee80211_process_delba(sdata, sta, 1705 mgmt, len); 1706 break; 1707 default: 1708 WARN_ON(1); 1709 break; 1710 } 1711 } 1712 mutex_unlock(&local->sta_mtx); 1713 } else if (ieee80211_is_action(mgmt->frame_control) && 1714 mgmt->u.action.category == WLAN_CATEGORY_VHT) { 1715 switch (mgmt->u.action.u.vht_group_notif.action_code) { 1716 case WLAN_VHT_ACTION_OPMODE_NOTIF: { 1717 struct ieee80211_rx_status *status; 1718 enum nl80211_band band; 1719 struct sta_info *sta; 1720 u8 opmode; 1721 1722 status = IEEE80211_SKB_RXCB(skb); 1723 band = status->band; 1724 opmode = mgmt->u.action.u.vht_opmode_notif.operating_mode; 1725 1726 mutex_lock(&local->sta_mtx); 1727 sta = sta_info_get_bss(sdata, mgmt->sa); 1728 1729 if (sta) 1730 ieee80211_vht_handle_opmode(sdata, 1731 &sta->deflink, 1732 opmode, band); 1733 1734 mutex_unlock(&local->sta_mtx); 1735 break; 1736 } 1737 case WLAN_VHT_ACTION_GROUPID_MGMT: 1738 ieee80211_process_mu_groups(sdata, &sdata->deflink, 1739 mgmt); 1740 break; 1741 default: 1742 WARN_ON(1); 1743 break; 1744 } 1745 } else if (ieee80211_is_action(mgmt->frame_control) && 1746 mgmt->u.action.category == WLAN_CATEGORY_S1G) { 1747 switch (mgmt->u.action.u.s1g.action_code) { 1748 case WLAN_S1G_TWT_TEARDOWN: 1749 case WLAN_S1G_TWT_SETUP: 1750 ieee80211_s1g_rx_twt_action(sdata, skb); 1751 break; 1752 default: 1753 break; 1754 } 1755 } else if (ieee80211_is_ext(mgmt->frame_control)) { 1756 if (sdata->vif.type == NL80211_IFTYPE_STATION) 1757 ieee80211_sta_rx_queued_ext(sdata, skb); 1758 else 1759 WARN_ON(1); 1760 } else if (ieee80211_is_data_qos(mgmt->frame_control)) { 1761 struct ieee80211_hdr *hdr = (void *)mgmt; 1762 struct sta_info *sta; 1763 1764 /* 1765 * So the frame isn't mgmt, but frame_control 1766 * is at the right place anyway, of course, so 1767 * the if statement is correct. 1768 * 1769 * Warn if we have other data frame types here, 1770 * they must not get here. 1771 */ 1772 WARN_ON(hdr->frame_control & 1773 cpu_to_le16(IEEE80211_STYPE_NULLFUNC)); 1774 WARN_ON(!(hdr->seq_ctrl & 1775 cpu_to_le16(IEEE80211_SCTL_FRAG))); 1776 /* 1777 * This was a fragment of a frame, received while 1778 * a block-ack session was active. That cannot be 1779 * right, so terminate the session. 1780 */ 1781 mutex_lock(&local->sta_mtx); 1782 sta = sta_info_get_bss(sdata, mgmt->sa); 1783 if (sta) { 1784 u16 tid = ieee80211_get_tid(hdr); 1785 1786 __ieee80211_stop_rx_ba_session( 1787 sta, tid, WLAN_BACK_RECIPIENT, 1788 WLAN_REASON_QSTA_REQUIRE_SETUP, 1789 true); 1790 } 1791 mutex_unlock(&local->sta_mtx); 1792 } else switch (sdata->vif.type) { 1793 case NL80211_IFTYPE_STATION: 1794 ieee80211_sta_rx_queued_mgmt(sdata, skb); 1795 break; 1796 case NL80211_IFTYPE_ADHOC: 1797 ieee80211_ibss_rx_queued_mgmt(sdata, skb); 1798 break; 1799 case NL80211_IFTYPE_MESH_POINT: 1800 if (!ieee80211_vif_is_mesh(&sdata->vif)) 1801 break; 1802 ieee80211_mesh_rx_queued_mgmt(sdata, skb); 1803 break; 1804 default: 1805 WARN(1, "frame for unexpected interface type"); 1806 break; 1807 } 1808 } 1809 1810 static void ieee80211_iface_process_status(struct ieee80211_sub_if_data *sdata, 1811 struct sk_buff *skb) 1812 { 1813 struct ieee80211_mgmt *mgmt = (void *)skb->data; 1814 1815 if (ieee80211_is_action(mgmt->frame_control) && 1816 mgmt->u.action.category == WLAN_CATEGORY_S1G) { 1817 switch (mgmt->u.action.u.s1g.action_code) { 1818 case WLAN_S1G_TWT_TEARDOWN: 1819 case WLAN_S1G_TWT_SETUP: 1820 ieee80211_s1g_status_twt_action(sdata, skb); 1821 break; 1822 default: 1823 break; 1824 } 1825 } 1826 } 1827 1828 static void ieee80211_iface_work(struct work_struct *work) 1829 { 1830 struct ieee80211_sub_if_data *sdata = 1831 container_of(work, struct ieee80211_sub_if_data, work); 1832 struct ieee80211_local *local = sdata->local; 1833 struct sk_buff *skb; 1834 1835 if (!ieee80211_sdata_running(sdata)) 1836 return; 1837 1838 if (test_bit(SCAN_SW_SCANNING, &local->scanning)) 1839 return; 1840 1841 if (!ieee80211_can_run_worker(local)) 1842 return; 1843 1844 /* first process frames */ 1845 while ((skb = skb_dequeue(&sdata->skb_queue))) { 1846 kcov_remote_start_common(skb_get_kcov_handle(skb)); 1847 1848 if (skb->protocol == cpu_to_be16(ETH_P_TDLS)) 1849 ieee80211_process_tdls_channel_switch(sdata, skb); 1850 else 1851 ieee80211_iface_process_skb(local, sdata, skb); 1852 1853 kfree_skb(skb); 1854 kcov_remote_stop(); 1855 } 1856 1857 /* process status queue */ 1858 while ((skb = skb_dequeue(&sdata->status_queue))) { 1859 kcov_remote_start_common(skb_get_kcov_handle(skb)); 1860 1861 ieee80211_iface_process_status(sdata, skb); 1862 kfree_skb(skb); 1863 1864 kcov_remote_stop(); 1865 } 1866 1867 /* then other type-dependent work */ 1868 switch (sdata->vif.type) { 1869 case NL80211_IFTYPE_STATION: 1870 ieee80211_sta_work(sdata); 1871 break; 1872 case NL80211_IFTYPE_ADHOC: 1873 ieee80211_ibss_work(sdata); 1874 break; 1875 case NL80211_IFTYPE_MESH_POINT: 1876 if (!ieee80211_vif_is_mesh(&sdata->vif)) 1877 break; 1878 ieee80211_mesh_work(sdata); 1879 break; 1880 case NL80211_IFTYPE_OCB: 1881 ieee80211_ocb_work(sdata); 1882 break; 1883 default: 1884 break; 1885 } 1886 } 1887 1888 static void ieee80211_recalc_smps_work(struct work_struct *work) 1889 { 1890 struct ieee80211_sub_if_data *sdata = 1891 container_of(work, struct ieee80211_sub_if_data, recalc_smps); 1892 1893 ieee80211_recalc_smps(sdata, &sdata->deflink); 1894 } 1895 1896 /* 1897 * Helper function to initialise an interface to a specific type. 1898 */ 1899 static void ieee80211_setup_sdata(struct ieee80211_sub_if_data *sdata, 1900 enum nl80211_iftype type) 1901 { 1902 static const u8 bssid_wildcard[ETH_ALEN] = {0xff, 0xff, 0xff, 1903 0xff, 0xff, 0xff}; 1904 1905 /* clear type-dependent unions */ 1906 memset(&sdata->u, 0, sizeof(sdata->u)); 1907 memset(&sdata->deflink.u, 0, sizeof(sdata->deflink.u)); 1908 1909 /* and set some type-dependent values */ 1910 sdata->vif.type = type; 1911 sdata->vif.p2p = false; 1912 sdata->wdev.iftype = type; 1913 1914 sdata->control_port_protocol = cpu_to_be16(ETH_P_PAE); 1915 sdata->control_port_no_encrypt = false; 1916 sdata->control_port_over_nl80211 = false; 1917 sdata->control_port_no_preauth = false; 1918 sdata->vif.cfg.idle = true; 1919 sdata->vif.bss_conf.txpower = INT_MIN; /* unset */ 1920 1921 sdata->noack_map = 0; 1922 1923 /* only monitor/p2p-device differ */ 1924 if (sdata->dev) { 1925 sdata->dev->netdev_ops = &ieee80211_dataif_ops; 1926 sdata->dev->type = ARPHRD_ETHER; 1927 } 1928 1929 skb_queue_head_init(&sdata->skb_queue); 1930 skb_queue_head_init(&sdata->status_queue); 1931 INIT_WORK(&sdata->work, ieee80211_iface_work); 1932 INIT_WORK(&sdata->recalc_smps, ieee80211_recalc_smps_work); 1933 1934 switch (type) { 1935 case NL80211_IFTYPE_P2P_GO: 1936 type = NL80211_IFTYPE_AP; 1937 sdata->vif.type = type; 1938 sdata->vif.p2p = true; 1939 fallthrough; 1940 case NL80211_IFTYPE_AP: 1941 skb_queue_head_init(&sdata->u.ap.ps.bc_buf); 1942 INIT_LIST_HEAD(&sdata->u.ap.vlans); 1943 sdata->vif.bss_conf.bssid = sdata->vif.addr; 1944 break; 1945 case NL80211_IFTYPE_P2P_CLIENT: 1946 type = NL80211_IFTYPE_STATION; 1947 sdata->vif.type = type; 1948 sdata->vif.p2p = true; 1949 fallthrough; 1950 case NL80211_IFTYPE_STATION: 1951 sdata->vif.bss_conf.bssid = sdata->deflink.u.mgd.bssid; 1952 ieee80211_sta_setup_sdata(sdata); 1953 break; 1954 case NL80211_IFTYPE_OCB: 1955 sdata->vif.bss_conf.bssid = bssid_wildcard; 1956 ieee80211_ocb_setup_sdata(sdata); 1957 break; 1958 case NL80211_IFTYPE_ADHOC: 1959 sdata->vif.bss_conf.bssid = sdata->u.ibss.bssid; 1960 ieee80211_ibss_setup_sdata(sdata); 1961 break; 1962 case NL80211_IFTYPE_MESH_POINT: 1963 if (ieee80211_vif_is_mesh(&sdata->vif)) 1964 ieee80211_mesh_init_sdata(sdata); 1965 break; 1966 case NL80211_IFTYPE_MONITOR: 1967 sdata->dev->type = ARPHRD_IEEE80211_RADIOTAP; 1968 sdata->dev->netdev_ops = &ieee80211_monitorif_ops; 1969 sdata->u.mntr.flags = MONITOR_FLAG_CONTROL | 1970 MONITOR_FLAG_OTHER_BSS; 1971 break; 1972 case NL80211_IFTYPE_NAN: 1973 idr_init(&sdata->u.nan.function_inst_ids); 1974 spin_lock_init(&sdata->u.nan.func_lock); 1975 sdata->vif.bss_conf.bssid = sdata->vif.addr; 1976 break; 1977 case NL80211_IFTYPE_AP_VLAN: 1978 case NL80211_IFTYPE_P2P_DEVICE: 1979 sdata->vif.bss_conf.bssid = sdata->vif.addr; 1980 break; 1981 case NL80211_IFTYPE_UNSPECIFIED: 1982 case NL80211_IFTYPE_WDS: 1983 case NUM_NL80211_IFTYPES: 1984 WARN_ON(1); 1985 break; 1986 } 1987 1988 /* need to do this after the switch so vif.type is correct */ 1989 ieee80211_link_setup(&sdata->deflink); 1990 1991 ieee80211_debugfs_add_netdev(sdata); 1992 } 1993 1994 static int ieee80211_runtime_change_iftype(struct ieee80211_sub_if_data *sdata, 1995 enum nl80211_iftype type) 1996 { 1997 struct ieee80211_local *local = sdata->local; 1998 int ret, err; 1999 enum nl80211_iftype internal_type = type; 2000 bool p2p = false; 2001 2002 ASSERT_RTNL(); 2003 2004 if (!local->ops->change_interface) 2005 return -EBUSY; 2006 2007 /* for now, don't support changing while links exist */ 2008 if (sdata->vif.valid_links) 2009 return -EBUSY; 2010 2011 switch (sdata->vif.type) { 2012 case NL80211_IFTYPE_AP: 2013 if (!list_empty(&sdata->u.ap.vlans)) 2014 return -EBUSY; 2015 break; 2016 case NL80211_IFTYPE_STATION: 2017 case NL80211_IFTYPE_ADHOC: 2018 case NL80211_IFTYPE_OCB: 2019 /* 2020 * Could maybe also all others here? 2021 * Just not sure how that interacts 2022 * with the RX/config path e.g. for 2023 * mesh. 2024 */ 2025 break; 2026 default: 2027 return -EBUSY; 2028 } 2029 2030 switch (type) { 2031 case NL80211_IFTYPE_AP: 2032 case NL80211_IFTYPE_STATION: 2033 case NL80211_IFTYPE_ADHOC: 2034 case NL80211_IFTYPE_OCB: 2035 /* 2036 * Could probably support everything 2037 * but here. 2038 */ 2039 break; 2040 case NL80211_IFTYPE_P2P_CLIENT: 2041 p2p = true; 2042 internal_type = NL80211_IFTYPE_STATION; 2043 break; 2044 case NL80211_IFTYPE_P2P_GO: 2045 p2p = true; 2046 internal_type = NL80211_IFTYPE_AP; 2047 break; 2048 default: 2049 return -EBUSY; 2050 } 2051 2052 ret = ieee80211_check_concurrent_iface(sdata, internal_type); 2053 if (ret) 2054 return ret; 2055 2056 ieee80211_stop_vif_queues(local, sdata, 2057 IEEE80211_QUEUE_STOP_REASON_IFTYPE_CHANGE); 2058 synchronize_net(); 2059 2060 ieee80211_do_stop(sdata, false); 2061 2062 ieee80211_teardown_sdata(sdata); 2063 2064 ieee80211_set_sdata_offload_flags(sdata); 2065 ret = drv_change_interface(local, sdata, internal_type, p2p); 2066 if (ret) 2067 type = ieee80211_vif_type_p2p(&sdata->vif); 2068 2069 /* 2070 * Ignore return value here, there's not much we can do since 2071 * the driver changed the interface type internally already. 2072 * The warnings will hopefully make driver authors fix it :-) 2073 */ 2074 ieee80211_check_queues(sdata, type); 2075 2076 ieee80211_setup_sdata(sdata, type); 2077 ieee80211_set_vif_encap_ops(sdata); 2078 2079 err = ieee80211_do_open(&sdata->wdev, false); 2080 WARN(err, "type change: do_open returned %d", err); 2081 2082 ieee80211_wake_vif_queues(local, sdata, 2083 IEEE80211_QUEUE_STOP_REASON_IFTYPE_CHANGE); 2084 return ret; 2085 } 2086 2087 int ieee80211_if_change_type(struct ieee80211_sub_if_data *sdata, 2088 enum nl80211_iftype type) 2089 { 2090 int ret; 2091 2092 ASSERT_RTNL(); 2093 2094 if (type == ieee80211_vif_type_p2p(&sdata->vif)) 2095 return 0; 2096 2097 if (ieee80211_sdata_running(sdata)) { 2098 ret = ieee80211_runtime_change_iftype(sdata, type); 2099 if (ret) 2100 return ret; 2101 } else { 2102 /* Purge and reset type-dependent state. */ 2103 ieee80211_teardown_sdata(sdata); 2104 ieee80211_setup_sdata(sdata, type); 2105 } 2106 2107 /* reset some values that shouldn't be kept across type changes */ 2108 if (type == NL80211_IFTYPE_STATION) 2109 sdata->u.mgd.use_4addr = false; 2110 2111 return 0; 2112 } 2113 2114 static void ieee80211_assign_perm_addr(struct ieee80211_local *local, 2115 u8 *perm_addr, enum nl80211_iftype type) 2116 { 2117 struct ieee80211_sub_if_data *sdata; 2118 u64 mask, start, addr, val, inc; 2119 u8 *m; 2120 u8 tmp_addr[ETH_ALEN]; 2121 int i; 2122 2123 /* default ... something at least */ 2124 memcpy(perm_addr, local->hw.wiphy->perm_addr, ETH_ALEN); 2125 2126 if (is_zero_ether_addr(local->hw.wiphy->addr_mask) && 2127 local->hw.wiphy->n_addresses <= 1) 2128 return; 2129 2130 mutex_lock(&local->iflist_mtx); 2131 2132 switch (type) { 2133 case NL80211_IFTYPE_MONITOR: 2134 /* doesn't matter */ 2135 break; 2136 case NL80211_IFTYPE_AP_VLAN: 2137 /* match up with an AP interface */ 2138 list_for_each_entry(sdata, &local->interfaces, list) { 2139 if (sdata->vif.type != NL80211_IFTYPE_AP) 2140 continue; 2141 memcpy(perm_addr, sdata->vif.addr, ETH_ALEN); 2142 break; 2143 } 2144 /* keep default if no AP interface present */ 2145 break; 2146 case NL80211_IFTYPE_P2P_CLIENT: 2147 case NL80211_IFTYPE_P2P_GO: 2148 if (ieee80211_hw_check(&local->hw, P2P_DEV_ADDR_FOR_INTF)) { 2149 list_for_each_entry(sdata, &local->interfaces, list) { 2150 if (sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE) 2151 continue; 2152 if (!ieee80211_sdata_running(sdata)) 2153 continue; 2154 memcpy(perm_addr, sdata->vif.addr, ETH_ALEN); 2155 goto out_unlock; 2156 } 2157 } 2158 fallthrough; 2159 default: 2160 /* assign a new address if possible -- try n_addresses first */ 2161 for (i = 0; i < local->hw.wiphy->n_addresses; i++) { 2162 bool used = false; 2163 2164 list_for_each_entry(sdata, &local->interfaces, list) { 2165 if (ether_addr_equal(local->hw.wiphy->addresses[i].addr, 2166 sdata->vif.addr)) { 2167 used = true; 2168 break; 2169 } 2170 } 2171 2172 if (!used) { 2173 memcpy(perm_addr, 2174 local->hw.wiphy->addresses[i].addr, 2175 ETH_ALEN); 2176 break; 2177 } 2178 } 2179 2180 /* try mask if available */ 2181 if (is_zero_ether_addr(local->hw.wiphy->addr_mask)) 2182 break; 2183 2184 m = local->hw.wiphy->addr_mask; 2185 mask = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) | 2186 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) | 2187 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8); 2188 2189 if (__ffs64(mask) + hweight64(mask) != fls64(mask)) { 2190 /* not a contiguous mask ... not handled now! */ 2191 pr_info("not contiguous\n"); 2192 break; 2193 } 2194 2195 /* 2196 * Pick address of existing interface in case user changed 2197 * MAC address manually, default to perm_addr. 2198 */ 2199 m = local->hw.wiphy->perm_addr; 2200 list_for_each_entry(sdata, &local->interfaces, list) { 2201 if (sdata->vif.type == NL80211_IFTYPE_MONITOR) 2202 continue; 2203 m = sdata->vif.addr; 2204 break; 2205 } 2206 start = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) | 2207 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) | 2208 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8); 2209 2210 inc = 1ULL<<__ffs64(mask); 2211 val = (start & mask); 2212 addr = (start & ~mask) | (val & mask); 2213 do { 2214 bool used = false; 2215 2216 tmp_addr[5] = addr >> 0*8; 2217 tmp_addr[4] = addr >> 1*8; 2218 tmp_addr[3] = addr >> 2*8; 2219 tmp_addr[2] = addr >> 3*8; 2220 tmp_addr[1] = addr >> 4*8; 2221 tmp_addr[0] = addr >> 5*8; 2222 2223 val += inc; 2224 2225 list_for_each_entry(sdata, &local->interfaces, list) { 2226 if (ether_addr_equal(tmp_addr, sdata->vif.addr)) { 2227 used = true; 2228 break; 2229 } 2230 } 2231 2232 if (!used) { 2233 memcpy(perm_addr, tmp_addr, ETH_ALEN); 2234 break; 2235 } 2236 addr = (start & ~mask) | (val & mask); 2237 } while (addr != start); 2238 2239 break; 2240 } 2241 2242 out_unlock: 2243 mutex_unlock(&local->iflist_mtx); 2244 } 2245 2246 int ieee80211_if_add(struct ieee80211_local *local, const char *name, 2247 unsigned char name_assign_type, 2248 struct wireless_dev **new_wdev, enum nl80211_iftype type, 2249 struct vif_params *params) 2250 { 2251 struct net_device *ndev = NULL; 2252 struct ieee80211_sub_if_data *sdata = NULL; 2253 struct txq_info *txqi; 2254 void (*if_setup)(struct net_device *dev); 2255 int ret, i; 2256 int txqs = 1; 2257 2258 ASSERT_RTNL(); 2259 2260 if (type == NL80211_IFTYPE_P2P_DEVICE || type == NL80211_IFTYPE_NAN) { 2261 struct wireless_dev *wdev; 2262 2263 sdata = kzalloc(sizeof(*sdata) + local->hw.vif_data_size, 2264 GFP_KERNEL); 2265 if (!sdata) 2266 return -ENOMEM; 2267 wdev = &sdata->wdev; 2268 2269 sdata->dev = NULL; 2270 strlcpy(sdata->name, name, IFNAMSIZ); 2271 ieee80211_assign_perm_addr(local, wdev->address, type); 2272 memcpy(sdata->vif.addr, wdev->address, ETH_ALEN); 2273 ether_addr_copy(sdata->vif.bss_conf.addr, sdata->vif.addr); 2274 } else { 2275 int size = ALIGN(sizeof(*sdata) + local->hw.vif_data_size, 2276 sizeof(void *)); 2277 int txq_size = 0; 2278 2279 if (local->ops->wake_tx_queue && 2280 type != NL80211_IFTYPE_AP_VLAN && 2281 (type != NL80211_IFTYPE_MONITOR || 2282 (params->flags & MONITOR_FLAG_ACTIVE))) 2283 txq_size += sizeof(struct txq_info) + 2284 local->hw.txq_data_size; 2285 2286 if (local->ops->wake_tx_queue) { 2287 if_setup = ieee80211_if_setup_no_queue; 2288 } else { 2289 if_setup = ieee80211_if_setup; 2290 if (local->hw.queues >= IEEE80211_NUM_ACS) 2291 txqs = IEEE80211_NUM_ACS; 2292 } 2293 2294 ndev = alloc_netdev_mqs(size + txq_size, 2295 name, name_assign_type, 2296 if_setup, txqs, 1); 2297 if (!ndev) 2298 return -ENOMEM; 2299 2300 if (!local->ops->wake_tx_queue && local->hw.wiphy->tx_queue_len) 2301 ndev->tx_queue_len = local->hw.wiphy->tx_queue_len; 2302 2303 dev_net_set(ndev, wiphy_net(local->hw.wiphy)); 2304 2305 ndev->tstats = netdev_alloc_pcpu_stats(struct pcpu_sw_netstats); 2306 if (!ndev->tstats) { 2307 free_netdev(ndev); 2308 return -ENOMEM; 2309 } 2310 2311 ndev->needed_headroom = local->tx_headroom + 2312 4*6 /* four MAC addresses */ 2313 + 2 + 2 + 2 + 2 /* ctl, dur, seq, qos */ 2314 + 6 /* mesh */ 2315 + 8 /* rfc1042/bridge tunnel */ 2316 - ETH_HLEN /* ethernet hard_header_len */ 2317 + IEEE80211_ENCRYPT_HEADROOM; 2318 ndev->needed_tailroom = IEEE80211_ENCRYPT_TAILROOM; 2319 2320 ret = dev_alloc_name(ndev, ndev->name); 2321 if (ret < 0) { 2322 ieee80211_if_free(ndev); 2323 free_netdev(ndev); 2324 return ret; 2325 } 2326 2327 ieee80211_assign_perm_addr(local, ndev->perm_addr, type); 2328 if (is_valid_ether_addr(params->macaddr)) 2329 eth_hw_addr_set(ndev, params->macaddr); 2330 else 2331 eth_hw_addr_set(ndev, ndev->perm_addr); 2332 SET_NETDEV_DEV(ndev, wiphy_dev(local->hw.wiphy)); 2333 2334 /* don't use IEEE80211_DEV_TO_SUB_IF -- it checks too much */ 2335 sdata = netdev_priv(ndev); 2336 ndev->ieee80211_ptr = &sdata->wdev; 2337 memcpy(sdata->vif.addr, ndev->dev_addr, ETH_ALEN); 2338 ether_addr_copy(sdata->vif.bss_conf.addr, sdata->vif.addr); 2339 memcpy(sdata->name, ndev->name, IFNAMSIZ); 2340 2341 if (txq_size) { 2342 txqi = netdev_priv(ndev) + size; 2343 ieee80211_txq_init(sdata, NULL, txqi, 0); 2344 } 2345 2346 sdata->dev = ndev; 2347 } 2348 2349 /* initialise type-independent data */ 2350 sdata->wdev.wiphy = local->hw.wiphy; 2351 2352 ieee80211_sdata_init(local, sdata); 2353 2354 ieee80211_init_frag_cache(&sdata->frags); 2355 2356 INIT_LIST_HEAD(&sdata->key_list); 2357 2358 INIT_DELAYED_WORK(&sdata->dec_tailroom_needed_wk, 2359 ieee80211_delayed_tailroom_dec); 2360 2361 for (i = 0; i < NUM_NL80211_BANDS; i++) { 2362 struct ieee80211_supported_band *sband; 2363 sband = local->hw.wiphy->bands[i]; 2364 sdata->rc_rateidx_mask[i] = 2365 sband ? (1 << sband->n_bitrates) - 1 : 0; 2366 if (sband) { 2367 __le16 cap; 2368 u16 *vht_rate_mask; 2369 2370 memcpy(sdata->rc_rateidx_mcs_mask[i], 2371 sband->ht_cap.mcs.rx_mask, 2372 sizeof(sdata->rc_rateidx_mcs_mask[i])); 2373 2374 cap = sband->vht_cap.vht_mcs.rx_mcs_map; 2375 vht_rate_mask = sdata->rc_rateidx_vht_mcs_mask[i]; 2376 ieee80211_get_vht_mask_from_cap(cap, vht_rate_mask); 2377 } else { 2378 memset(sdata->rc_rateidx_mcs_mask[i], 0, 2379 sizeof(sdata->rc_rateidx_mcs_mask[i])); 2380 memset(sdata->rc_rateidx_vht_mcs_mask[i], 0, 2381 sizeof(sdata->rc_rateidx_vht_mcs_mask[i])); 2382 } 2383 } 2384 2385 ieee80211_set_default_queues(sdata); 2386 2387 sdata->deflink.ap_power_level = IEEE80211_UNSET_POWER_LEVEL; 2388 sdata->deflink.user_power_level = local->user_power_level; 2389 2390 /* setup type-dependent data */ 2391 ieee80211_setup_sdata(sdata, type); 2392 2393 if (ndev) { 2394 ndev->ieee80211_ptr->use_4addr = params->use_4addr; 2395 if (type == NL80211_IFTYPE_STATION) 2396 sdata->u.mgd.use_4addr = params->use_4addr; 2397 2398 ndev->features |= local->hw.netdev_features; 2399 ndev->hw_features |= ndev->features & 2400 MAC80211_SUPPORTED_FEATURES_TX; 2401 2402 netdev_set_default_ethtool_ops(ndev, &ieee80211_ethtool_ops); 2403 2404 /* MTU range is normally 256 - 2304, where the upper limit is 2405 * the maximum MSDU size. Monitor interfaces send and receive 2406 * MPDU and A-MSDU frames which may be much larger so we do 2407 * not impose an upper limit in that case. 2408 */ 2409 ndev->min_mtu = 256; 2410 if (type == NL80211_IFTYPE_MONITOR) 2411 ndev->max_mtu = 0; 2412 else 2413 ndev->max_mtu = local->hw.max_mtu; 2414 2415 ret = cfg80211_register_netdevice(ndev); 2416 if (ret) { 2417 free_netdev(ndev); 2418 return ret; 2419 } 2420 } 2421 2422 mutex_lock(&local->iflist_mtx); 2423 list_add_tail_rcu(&sdata->list, &local->interfaces); 2424 mutex_unlock(&local->iflist_mtx); 2425 2426 if (new_wdev) 2427 *new_wdev = &sdata->wdev; 2428 2429 return 0; 2430 } 2431 2432 void ieee80211_if_remove(struct ieee80211_sub_if_data *sdata) 2433 { 2434 ASSERT_RTNL(); 2435 2436 mutex_lock(&sdata->local->iflist_mtx); 2437 list_del_rcu(&sdata->list); 2438 mutex_unlock(&sdata->local->iflist_mtx); 2439 2440 if (sdata->vif.txq) 2441 ieee80211_txq_purge(sdata->local, to_txq_info(sdata->vif.txq)); 2442 2443 synchronize_rcu(); 2444 2445 cfg80211_unregister_wdev(&sdata->wdev); 2446 2447 if (!sdata->dev) { 2448 ieee80211_teardown_sdata(sdata); 2449 kfree(sdata); 2450 } 2451 } 2452 2453 void ieee80211_sdata_stop(struct ieee80211_sub_if_data *sdata) 2454 { 2455 if (WARN_ON_ONCE(!test_bit(SDATA_STATE_RUNNING, &sdata->state))) 2456 return; 2457 ieee80211_do_stop(sdata, true); 2458 } 2459 2460 void ieee80211_remove_interfaces(struct ieee80211_local *local) 2461 { 2462 struct ieee80211_sub_if_data *sdata, *tmp; 2463 LIST_HEAD(unreg_list); 2464 LIST_HEAD(wdev_list); 2465 2466 ASSERT_RTNL(); 2467 2468 /* Before destroying the interfaces, make sure they're all stopped so 2469 * that the hardware is stopped. Otherwise, the driver might still be 2470 * iterating the interfaces during the shutdown, e.g. from a worker 2471 * or from RX processing or similar, and if it does so (using atomic 2472 * iteration) while we're manipulating the list, the iteration will 2473 * crash. 2474 * 2475 * After this, the hardware should be stopped and the driver should 2476 * have stopped all of its activities, so that we can do RCU-unaware 2477 * manipulations of the interface list below. 2478 */ 2479 cfg80211_shutdown_all_interfaces(local->hw.wiphy); 2480 2481 WARN(local->open_count, "%s: open count remains %d\n", 2482 wiphy_name(local->hw.wiphy), local->open_count); 2483 2484 ieee80211_txq_teardown_flows(local); 2485 2486 mutex_lock(&local->iflist_mtx); 2487 list_for_each_entry_safe(sdata, tmp, &local->interfaces, list) { 2488 list_del(&sdata->list); 2489 2490 if (sdata->dev) 2491 unregister_netdevice_queue(sdata->dev, &unreg_list); 2492 else 2493 list_add(&sdata->list, &wdev_list); 2494 } 2495 mutex_unlock(&local->iflist_mtx); 2496 2497 unregister_netdevice_many(&unreg_list); 2498 2499 wiphy_lock(local->hw.wiphy); 2500 list_for_each_entry_safe(sdata, tmp, &wdev_list, list) { 2501 list_del(&sdata->list); 2502 cfg80211_unregister_wdev(&sdata->wdev); 2503 kfree(sdata); 2504 } 2505 wiphy_unlock(local->hw.wiphy); 2506 } 2507 2508 static int netdev_notify(struct notifier_block *nb, 2509 unsigned long state, void *ptr) 2510 { 2511 struct net_device *dev = netdev_notifier_info_to_dev(ptr); 2512 struct ieee80211_sub_if_data *sdata; 2513 2514 if (state != NETDEV_CHANGENAME) 2515 return NOTIFY_DONE; 2516 2517 if (!dev->ieee80211_ptr || !dev->ieee80211_ptr->wiphy) 2518 return NOTIFY_DONE; 2519 2520 if (dev->ieee80211_ptr->wiphy->privid != mac80211_wiphy_privid) 2521 return NOTIFY_DONE; 2522 2523 sdata = IEEE80211_DEV_TO_SUB_IF(dev); 2524 memcpy(sdata->name, dev->name, IFNAMSIZ); 2525 ieee80211_debugfs_rename_netdev(sdata); 2526 2527 return NOTIFY_OK; 2528 } 2529 2530 static struct notifier_block mac80211_netdev_notifier = { 2531 .notifier_call = netdev_notify, 2532 }; 2533 2534 int ieee80211_iface_init(void) 2535 { 2536 return register_netdevice_notifier(&mac80211_netdev_notifier); 2537 } 2538 2539 void ieee80211_iface_exit(void) 2540 { 2541 unregister_netdevice_notifier(&mac80211_netdev_notifier); 2542 } 2543 2544 void ieee80211_vif_inc_num_mcast(struct ieee80211_sub_if_data *sdata) 2545 { 2546 if (sdata->vif.type == NL80211_IFTYPE_AP) 2547 atomic_inc(&sdata->u.ap.num_mcast_sta); 2548 else if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) 2549 atomic_inc(&sdata->u.vlan.num_mcast_sta); 2550 } 2551 2552 void ieee80211_vif_dec_num_mcast(struct ieee80211_sub_if_data *sdata) 2553 { 2554 if (sdata->vif.type == NL80211_IFTYPE_AP) 2555 atomic_dec(&sdata->u.ap.num_mcast_sta); 2556 else if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) 2557 atomic_dec(&sdata->u.vlan.num_mcast_sta); 2558 } 2559