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 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_WDS) || 234 (type1 == NL80211_IFTYPE_WDS && 235 (type2 == NL80211_IFTYPE_WDS || 236 type2 == NL80211_IFTYPE_AP)) || 237 (type1 == NL80211_IFTYPE_AP && type2 == NL80211_IFTYPE_AP_VLAN) || 238 (type1 == NL80211_IFTYPE_AP_VLAN && 239 (type2 == NL80211_IFTYPE_AP || 240 type2 == NL80211_IFTYPE_AP_VLAN)); 241 } 242 243 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.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 void ieee80211_adjust_monitor_flags(struct ieee80211_sub_if_data *sdata, 352 const int offset) 353 { 354 struct ieee80211_local *local = sdata->local; 355 u32 flags = sdata->u.mntr.flags; 356 357 #define ADJUST(_f, _s) do { \ 358 if (flags & MONITOR_FLAG_##_f) \ 359 local->fif_##_s += offset; \ 360 } while (0) 361 362 ADJUST(FCSFAIL, fcsfail); 363 ADJUST(PLCPFAIL, plcpfail); 364 ADJUST(CONTROL, control); 365 ADJUST(CONTROL, pspoll); 366 ADJUST(OTHER_BSS, other_bss); 367 368 #undef ADJUST 369 } 370 371 static void ieee80211_set_default_queues(struct ieee80211_sub_if_data *sdata) 372 { 373 struct ieee80211_local *local = sdata->local; 374 int i; 375 376 for (i = 0; i < IEEE80211_NUM_ACS; i++) { 377 if (ieee80211_hw_check(&local->hw, QUEUE_CONTROL)) 378 sdata->vif.hw_queue[i] = IEEE80211_INVAL_HW_QUEUE; 379 else if (local->hw.queues >= IEEE80211_NUM_ACS) 380 sdata->vif.hw_queue[i] = i; 381 else 382 sdata->vif.hw_queue[i] = 0; 383 } 384 sdata->vif.cab_queue = IEEE80211_INVAL_HW_QUEUE; 385 } 386 387 int ieee80211_add_virtual_monitor(struct ieee80211_local *local) 388 { 389 struct ieee80211_sub_if_data *sdata; 390 int ret; 391 392 if (!ieee80211_hw_check(&local->hw, WANT_MONITOR_VIF)) 393 return 0; 394 395 ASSERT_RTNL(); 396 397 if (local->monitor_sdata) 398 return 0; 399 400 sdata = kzalloc(sizeof(*sdata) + local->hw.vif_data_size, GFP_KERNEL); 401 if (!sdata) 402 return -ENOMEM; 403 404 /* set up data */ 405 sdata->local = local; 406 sdata->vif.type = NL80211_IFTYPE_MONITOR; 407 snprintf(sdata->name, IFNAMSIZ, "%s-monitor", 408 wiphy_name(local->hw.wiphy)); 409 sdata->wdev.iftype = NL80211_IFTYPE_MONITOR; 410 411 sdata->encrypt_headroom = IEEE80211_ENCRYPT_HEADROOM; 412 413 ieee80211_set_default_queues(sdata); 414 415 ret = drv_add_interface(local, sdata); 416 if (WARN_ON(ret)) { 417 /* ok .. stupid driver, it asked for this! */ 418 kfree(sdata); 419 return ret; 420 } 421 422 ret = ieee80211_check_queues(sdata, NL80211_IFTYPE_MONITOR); 423 if (ret) { 424 kfree(sdata); 425 return ret; 426 } 427 428 mutex_lock(&local->iflist_mtx); 429 rcu_assign_pointer(local->monitor_sdata, sdata); 430 mutex_unlock(&local->iflist_mtx); 431 432 mutex_lock(&local->mtx); 433 ret = ieee80211_vif_use_channel(sdata, &local->monitor_chandef, 434 IEEE80211_CHANCTX_EXCLUSIVE); 435 mutex_unlock(&local->mtx); 436 if (ret) { 437 mutex_lock(&local->iflist_mtx); 438 RCU_INIT_POINTER(local->monitor_sdata, NULL); 439 mutex_unlock(&local->iflist_mtx); 440 synchronize_net(); 441 drv_remove_interface(local, sdata); 442 kfree(sdata); 443 return ret; 444 } 445 446 skb_queue_head_init(&sdata->skb_queue); 447 INIT_WORK(&sdata->work, ieee80211_iface_work); 448 449 return 0; 450 } 451 452 void ieee80211_del_virtual_monitor(struct ieee80211_local *local) 453 { 454 struct ieee80211_sub_if_data *sdata; 455 456 if (!ieee80211_hw_check(&local->hw, WANT_MONITOR_VIF)) 457 return; 458 459 ASSERT_RTNL(); 460 461 mutex_lock(&local->iflist_mtx); 462 463 sdata = rcu_dereference_protected(local->monitor_sdata, 464 lockdep_is_held(&local->iflist_mtx)); 465 if (!sdata) { 466 mutex_unlock(&local->iflist_mtx); 467 return; 468 } 469 470 RCU_INIT_POINTER(local->monitor_sdata, NULL); 471 mutex_unlock(&local->iflist_mtx); 472 473 synchronize_net(); 474 475 mutex_lock(&local->mtx); 476 ieee80211_vif_release_channel(sdata); 477 mutex_unlock(&local->mtx); 478 479 drv_remove_interface(local, sdata); 480 481 kfree(sdata); 482 } 483 484 /* 485 * NOTE: Be very careful when changing this function, it must NOT return 486 * an error on interface type changes that have been pre-checked, so most 487 * checks should be in ieee80211_check_concurrent_iface. 488 */ 489 int ieee80211_do_open(struct wireless_dev *wdev, bool coming_up) 490 { 491 struct ieee80211_sub_if_data *sdata = IEEE80211_WDEV_TO_SUB_IF(wdev); 492 struct net_device *dev = wdev->netdev; 493 struct ieee80211_local *local = sdata->local; 494 struct sta_info *sta; 495 u32 changed = 0; 496 int res; 497 u32 hw_reconf_flags = 0; 498 499 switch (sdata->vif.type) { 500 case NL80211_IFTYPE_WDS: 501 if (!is_valid_ether_addr(sdata->u.wds.remote_addr)) 502 return -ENOLINK; 503 break; 504 case NL80211_IFTYPE_AP_VLAN: { 505 struct ieee80211_sub_if_data *master; 506 507 if (!sdata->bss) 508 return -ENOLINK; 509 510 mutex_lock(&local->mtx); 511 list_add(&sdata->u.vlan.list, &sdata->bss->vlans); 512 mutex_unlock(&local->mtx); 513 514 master = container_of(sdata->bss, 515 struct ieee80211_sub_if_data, u.ap); 516 sdata->control_port_protocol = 517 master->control_port_protocol; 518 sdata->control_port_no_encrypt = 519 master->control_port_no_encrypt; 520 sdata->control_port_over_nl80211 = 521 master->control_port_over_nl80211; 522 sdata->vif.cab_queue = master->vif.cab_queue; 523 memcpy(sdata->vif.hw_queue, master->vif.hw_queue, 524 sizeof(sdata->vif.hw_queue)); 525 sdata->vif.bss_conf.chandef = master->vif.bss_conf.chandef; 526 527 mutex_lock(&local->key_mtx); 528 sdata->crypto_tx_tailroom_needed_cnt += 529 master->crypto_tx_tailroom_needed_cnt; 530 mutex_unlock(&local->key_mtx); 531 532 break; 533 } 534 case NL80211_IFTYPE_AP: 535 sdata->bss = &sdata->u.ap; 536 break; 537 case NL80211_IFTYPE_MESH_POINT: 538 case NL80211_IFTYPE_STATION: 539 case NL80211_IFTYPE_MONITOR: 540 case NL80211_IFTYPE_ADHOC: 541 case NL80211_IFTYPE_P2P_DEVICE: 542 case NL80211_IFTYPE_OCB: 543 case NL80211_IFTYPE_NAN: 544 /* no special treatment */ 545 break; 546 case NL80211_IFTYPE_UNSPECIFIED: 547 case NUM_NL80211_IFTYPES: 548 case NL80211_IFTYPE_P2P_CLIENT: 549 case NL80211_IFTYPE_P2P_GO: 550 /* cannot happen */ 551 WARN_ON(1); 552 break; 553 } 554 555 if (local->open_count == 0) { 556 res = drv_start(local); 557 if (res) 558 goto err_del_bss; 559 /* we're brought up, everything changes */ 560 hw_reconf_flags = ~0; 561 ieee80211_led_radio(local, true); 562 ieee80211_mod_tpt_led_trig(local, 563 IEEE80211_TPT_LEDTRIG_FL_RADIO, 0); 564 } 565 566 /* 567 * Copy the hopefully now-present MAC address to 568 * this interface, if it has the special null one. 569 */ 570 if (dev && is_zero_ether_addr(dev->dev_addr)) { 571 memcpy(dev->dev_addr, 572 local->hw.wiphy->perm_addr, 573 ETH_ALEN); 574 memcpy(dev->perm_addr, dev->dev_addr, ETH_ALEN); 575 576 if (!is_valid_ether_addr(dev->dev_addr)) { 577 res = -EADDRNOTAVAIL; 578 goto err_stop; 579 } 580 } 581 582 switch (sdata->vif.type) { 583 case NL80211_IFTYPE_AP_VLAN: 584 /* no need to tell driver, but set carrier and chanctx */ 585 if (rtnl_dereference(sdata->bss->beacon)) { 586 ieee80211_vif_vlan_copy_chanctx(sdata); 587 netif_carrier_on(dev); 588 } else { 589 netif_carrier_off(dev); 590 } 591 break; 592 case NL80211_IFTYPE_MONITOR: 593 if (sdata->u.mntr.flags & MONITOR_FLAG_COOK_FRAMES) { 594 local->cooked_mntrs++; 595 break; 596 } 597 598 if (sdata->u.mntr.flags & MONITOR_FLAG_ACTIVE) { 599 res = drv_add_interface(local, sdata); 600 if (res) 601 goto err_stop; 602 } else if (local->monitors == 0 && local->open_count == 0) { 603 res = ieee80211_add_virtual_monitor(local); 604 if (res) 605 goto err_stop; 606 } 607 608 /* must be before the call to ieee80211_configure_filter */ 609 local->monitors++; 610 if (local->monitors == 1) { 611 local->hw.conf.flags |= IEEE80211_CONF_MONITOR; 612 hw_reconf_flags |= IEEE80211_CONF_CHANGE_MONITOR; 613 } 614 615 ieee80211_adjust_monitor_flags(sdata, 1); 616 ieee80211_configure_filter(local); 617 mutex_lock(&local->mtx); 618 ieee80211_recalc_idle(local); 619 mutex_unlock(&local->mtx); 620 621 netif_carrier_on(dev); 622 break; 623 default: 624 if (coming_up) { 625 ieee80211_del_virtual_monitor(local); 626 627 res = drv_add_interface(local, sdata); 628 if (res) 629 goto err_stop; 630 res = ieee80211_check_queues(sdata, 631 ieee80211_vif_type_p2p(&sdata->vif)); 632 if (res) 633 goto err_del_interface; 634 } 635 636 if (sdata->vif.type == NL80211_IFTYPE_AP) { 637 local->fif_pspoll++; 638 local->fif_probe_req++; 639 640 ieee80211_configure_filter(local); 641 } else if (sdata->vif.type == NL80211_IFTYPE_ADHOC) { 642 local->fif_probe_req++; 643 } 644 645 if (sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE && 646 sdata->vif.type != NL80211_IFTYPE_NAN) 647 changed |= ieee80211_reset_erp_info(sdata); 648 ieee80211_bss_info_change_notify(sdata, changed); 649 650 switch (sdata->vif.type) { 651 case NL80211_IFTYPE_STATION: 652 case NL80211_IFTYPE_ADHOC: 653 case NL80211_IFTYPE_AP: 654 case NL80211_IFTYPE_MESH_POINT: 655 case NL80211_IFTYPE_OCB: 656 netif_carrier_off(dev); 657 break; 658 case NL80211_IFTYPE_WDS: 659 case NL80211_IFTYPE_P2P_DEVICE: 660 case NL80211_IFTYPE_NAN: 661 break; 662 default: 663 /* not reached */ 664 WARN_ON(1); 665 } 666 667 /* 668 * Set default queue parameters so drivers don't 669 * need to initialise the hardware if the hardware 670 * doesn't start up with sane defaults. 671 * Enable QoS for anything but station interfaces. 672 */ 673 ieee80211_set_wmm_default(sdata, true, 674 sdata->vif.type != NL80211_IFTYPE_STATION); 675 } 676 677 set_bit(SDATA_STATE_RUNNING, &sdata->state); 678 679 switch (sdata->vif.type) { 680 case NL80211_IFTYPE_WDS: 681 /* Create STA entry for the WDS peer */ 682 sta = sta_info_alloc(sdata, sdata->u.wds.remote_addr, 683 GFP_KERNEL); 684 if (!sta) { 685 res = -ENOMEM; 686 goto err_del_interface; 687 } 688 689 sta_info_pre_move_state(sta, IEEE80211_STA_AUTH); 690 sta_info_pre_move_state(sta, IEEE80211_STA_ASSOC); 691 sta_info_pre_move_state(sta, IEEE80211_STA_AUTHORIZED); 692 693 res = sta_info_insert(sta); 694 if (res) { 695 /* STA has been freed */ 696 goto err_del_interface; 697 } 698 699 rate_control_rate_init(sta); 700 netif_carrier_on(dev); 701 break; 702 case NL80211_IFTYPE_P2P_DEVICE: 703 rcu_assign_pointer(local->p2p_sdata, sdata); 704 break; 705 case NL80211_IFTYPE_MONITOR: 706 if (sdata->u.mntr.flags & MONITOR_FLAG_COOK_FRAMES) 707 break; 708 list_add_tail_rcu(&sdata->u.mntr.list, &local->mon_list); 709 break; 710 default: 711 break; 712 } 713 714 /* 715 * set_multicast_list will be invoked by the networking core 716 * which will check whether any increments here were done in 717 * error and sync them down to the hardware as filter flags. 718 */ 719 if (sdata->flags & IEEE80211_SDATA_ALLMULTI) 720 atomic_inc(&local->iff_allmultis); 721 722 if (coming_up) 723 local->open_count++; 724 725 if (hw_reconf_flags) 726 ieee80211_hw_config(local, hw_reconf_flags); 727 728 ieee80211_recalc_ps(local); 729 730 if (sdata->vif.type == NL80211_IFTYPE_MONITOR || 731 sdata->vif.type == NL80211_IFTYPE_AP_VLAN || 732 local->ops->wake_tx_queue) { 733 /* XXX: for AP_VLAN, actually track AP queues */ 734 if (dev) 735 netif_tx_start_all_queues(dev); 736 } else if (dev) { 737 unsigned long flags; 738 int n_acs = IEEE80211_NUM_ACS; 739 int ac; 740 741 if (local->hw.queues < IEEE80211_NUM_ACS) 742 n_acs = 1; 743 744 spin_lock_irqsave(&local->queue_stop_reason_lock, flags); 745 if (sdata->vif.cab_queue == IEEE80211_INVAL_HW_QUEUE || 746 (local->queue_stop_reasons[sdata->vif.cab_queue] == 0 && 747 skb_queue_empty(&local->pending[sdata->vif.cab_queue]))) { 748 for (ac = 0; ac < n_acs; ac++) { 749 int ac_queue = sdata->vif.hw_queue[ac]; 750 751 if (local->queue_stop_reasons[ac_queue] == 0 && 752 skb_queue_empty(&local->pending[ac_queue])) 753 netif_start_subqueue(dev, ac); 754 } 755 } 756 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); 757 } 758 759 return 0; 760 err_del_interface: 761 drv_remove_interface(local, sdata); 762 err_stop: 763 if (!local->open_count) 764 drv_stop(local); 765 err_del_bss: 766 sdata->bss = NULL; 767 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) { 768 mutex_lock(&local->mtx); 769 list_del(&sdata->u.vlan.list); 770 mutex_unlock(&local->mtx); 771 } 772 /* might already be clear but that doesn't matter */ 773 clear_bit(SDATA_STATE_RUNNING, &sdata->state); 774 return res; 775 } 776 777 static int ieee80211_open(struct net_device *dev) 778 { 779 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); 780 int err; 781 782 /* fail early if user set an invalid address */ 783 if (!is_valid_ether_addr(dev->dev_addr)) 784 return -EADDRNOTAVAIL; 785 786 err = ieee80211_check_concurrent_iface(sdata, sdata->vif.type); 787 if (err) 788 return err; 789 790 return ieee80211_do_open(&sdata->wdev, true); 791 } 792 793 static void ieee80211_do_stop(struct ieee80211_sub_if_data *sdata, 794 bool going_down) 795 { 796 struct ieee80211_local *local = sdata->local; 797 unsigned long flags; 798 struct sk_buff *skb, *tmp; 799 u32 hw_reconf_flags = 0; 800 int i, flushed; 801 struct ps_data *ps; 802 struct cfg80211_chan_def chandef; 803 bool cancel_scan; 804 struct cfg80211_nan_func *func; 805 806 clear_bit(SDATA_STATE_RUNNING, &sdata->state); 807 808 cancel_scan = rcu_access_pointer(local->scan_sdata) == sdata; 809 if (cancel_scan) 810 ieee80211_scan_cancel(local); 811 812 /* 813 * Stop TX on this interface first. 814 */ 815 if (sdata->dev) 816 netif_tx_stop_all_queues(sdata->dev); 817 818 ieee80211_roc_purge(local, sdata); 819 820 switch (sdata->vif.type) { 821 case NL80211_IFTYPE_STATION: 822 ieee80211_mgd_stop(sdata); 823 break; 824 case NL80211_IFTYPE_ADHOC: 825 ieee80211_ibss_stop(sdata); 826 break; 827 case NL80211_IFTYPE_AP: 828 cancel_work_sync(&sdata->u.ap.request_smps_work); 829 break; 830 case NL80211_IFTYPE_MONITOR: 831 if (sdata->u.mntr.flags & MONITOR_FLAG_COOK_FRAMES) 832 break; 833 list_del_rcu(&sdata->u.mntr.list); 834 break; 835 default: 836 break; 837 } 838 839 /* 840 * Remove all stations associated with this interface. 841 * 842 * This must be done before calling ops->remove_interface() 843 * because otherwise we can later invoke ops->sta_notify() 844 * whenever the STAs are removed, and that invalidates driver 845 * assumptions about always getting a vif pointer that is valid 846 * (because if we remove a STA after ops->remove_interface() 847 * the driver will have removed the vif info already!) 848 * 849 * In WDS mode a station must exist here and be flushed, for 850 * AP_VLANs stations may exist since there's nothing else that 851 * would have removed them, but in other modes there shouldn't 852 * be any stations. 853 */ 854 flushed = sta_info_flush(sdata); 855 WARN_ON_ONCE(sdata->vif.type != NL80211_IFTYPE_AP_VLAN && 856 ((sdata->vif.type != NL80211_IFTYPE_WDS && flushed > 0) || 857 (sdata->vif.type == NL80211_IFTYPE_WDS && flushed != 1))); 858 859 /* don't count this interface for allmulti while it is down */ 860 if (sdata->flags & IEEE80211_SDATA_ALLMULTI) 861 atomic_dec(&local->iff_allmultis); 862 863 if (sdata->vif.type == NL80211_IFTYPE_AP) { 864 local->fif_pspoll--; 865 local->fif_probe_req--; 866 } else if (sdata->vif.type == NL80211_IFTYPE_ADHOC) { 867 local->fif_probe_req--; 868 } 869 870 if (sdata->dev) { 871 netif_addr_lock_bh(sdata->dev); 872 spin_lock_bh(&local->filter_lock); 873 __hw_addr_unsync(&local->mc_list, &sdata->dev->mc, 874 sdata->dev->addr_len); 875 spin_unlock_bh(&local->filter_lock); 876 netif_addr_unlock_bh(sdata->dev); 877 } 878 879 del_timer_sync(&local->dynamic_ps_timer); 880 cancel_work_sync(&local->dynamic_ps_enable_work); 881 882 cancel_work_sync(&sdata->recalc_smps); 883 sdata_lock(sdata); 884 mutex_lock(&local->mtx); 885 sdata->vif.csa_active = false; 886 if (sdata->vif.type == NL80211_IFTYPE_STATION) 887 sdata->u.mgd.csa_waiting_bcn = false; 888 if (sdata->csa_block_tx) { 889 ieee80211_wake_vif_queues(local, sdata, 890 IEEE80211_QUEUE_STOP_REASON_CSA); 891 sdata->csa_block_tx = false; 892 } 893 mutex_unlock(&local->mtx); 894 sdata_unlock(sdata); 895 896 cancel_work_sync(&sdata->csa_finalize_work); 897 898 cancel_delayed_work_sync(&sdata->dfs_cac_timer_work); 899 900 if (sdata->wdev.cac_started) { 901 chandef = sdata->vif.bss_conf.chandef; 902 WARN_ON(local->suspended); 903 mutex_lock(&local->mtx); 904 ieee80211_vif_release_channel(sdata); 905 mutex_unlock(&local->mtx); 906 cfg80211_cac_event(sdata->dev, &chandef, 907 NL80211_RADAR_CAC_ABORTED, 908 GFP_KERNEL); 909 } 910 911 /* APs need special treatment */ 912 if (sdata->vif.type == NL80211_IFTYPE_AP) { 913 struct ieee80211_sub_if_data *vlan, *tmpsdata; 914 915 /* down all dependent devices, that is VLANs */ 916 list_for_each_entry_safe(vlan, tmpsdata, &sdata->u.ap.vlans, 917 u.vlan.list) 918 dev_close(vlan->dev); 919 WARN_ON(!list_empty(&sdata->u.ap.vlans)); 920 } else if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) { 921 /* remove all packets in parent bc_buf pointing to this dev */ 922 ps = &sdata->bss->ps; 923 924 spin_lock_irqsave(&ps->bc_buf.lock, flags); 925 skb_queue_walk_safe(&ps->bc_buf, skb, tmp) { 926 if (skb->dev == sdata->dev) { 927 __skb_unlink(skb, &ps->bc_buf); 928 local->total_ps_buffered--; 929 ieee80211_free_txskb(&local->hw, skb); 930 } 931 } 932 spin_unlock_irqrestore(&ps->bc_buf.lock, flags); 933 } 934 935 if (going_down) 936 local->open_count--; 937 938 switch (sdata->vif.type) { 939 case NL80211_IFTYPE_AP_VLAN: 940 mutex_lock(&local->mtx); 941 list_del(&sdata->u.vlan.list); 942 mutex_unlock(&local->mtx); 943 RCU_INIT_POINTER(sdata->vif.chanctx_conf, NULL); 944 /* see comment in the default case below */ 945 ieee80211_free_keys(sdata, true); 946 /* no need to tell driver */ 947 break; 948 case NL80211_IFTYPE_MONITOR: 949 if (sdata->u.mntr.flags & MONITOR_FLAG_COOK_FRAMES) { 950 local->cooked_mntrs--; 951 break; 952 } 953 954 local->monitors--; 955 if (local->monitors == 0) { 956 local->hw.conf.flags &= ~IEEE80211_CONF_MONITOR; 957 hw_reconf_flags |= IEEE80211_CONF_CHANGE_MONITOR; 958 } 959 960 ieee80211_adjust_monitor_flags(sdata, -1); 961 break; 962 case NL80211_IFTYPE_NAN: 963 /* clean all the functions */ 964 spin_lock_bh(&sdata->u.nan.func_lock); 965 966 idr_for_each_entry(&sdata->u.nan.function_inst_ids, func, i) { 967 idr_remove(&sdata->u.nan.function_inst_ids, i); 968 cfg80211_free_nan_func(func); 969 } 970 idr_destroy(&sdata->u.nan.function_inst_ids); 971 972 spin_unlock_bh(&sdata->u.nan.func_lock); 973 break; 974 case NL80211_IFTYPE_P2P_DEVICE: 975 /* relies on synchronize_rcu() below */ 976 RCU_INIT_POINTER(local->p2p_sdata, NULL); 977 /* fall through */ 978 default: 979 cancel_work_sync(&sdata->work); 980 /* 981 * When we get here, the interface is marked down. 982 * Free the remaining keys, if there are any 983 * (which can happen in AP mode if userspace sets 984 * keys before the interface is operating, and maybe 985 * also in WDS mode) 986 * 987 * Force the key freeing to always synchronize_net() 988 * to wait for the RX path in case it is using this 989 * interface enqueuing frames at this very time on 990 * another CPU. 991 */ 992 ieee80211_free_keys(sdata, true); 993 skb_queue_purge(&sdata->skb_queue); 994 } 995 996 spin_lock_irqsave(&local->queue_stop_reason_lock, flags); 997 for (i = 0; i < IEEE80211_MAX_QUEUES; i++) { 998 skb_queue_walk_safe(&local->pending[i], skb, tmp) { 999 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); 1000 if (info->control.vif == &sdata->vif) { 1001 __skb_unlink(skb, &local->pending[i]); 1002 ieee80211_free_txskb(&local->hw, skb); 1003 } 1004 } 1005 } 1006 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); 1007 1008 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) 1009 ieee80211_txq_remove_vlan(local, sdata); 1010 1011 sdata->bss = NULL; 1012 1013 if (local->open_count == 0) 1014 ieee80211_clear_tx_pending(local); 1015 1016 sdata->vif.bss_conf.beacon_int = 0; 1017 1018 /* 1019 * If the interface goes down while suspended, presumably because 1020 * the device was unplugged and that happens before our resume, 1021 * then the driver is already unconfigured and the remainder of 1022 * this function isn't needed. 1023 * XXX: what about WoWLAN? If the device has software state, e.g. 1024 * memory allocated, it might expect teardown commands from 1025 * mac80211 here? 1026 */ 1027 if (local->suspended) { 1028 WARN_ON(local->wowlan); 1029 WARN_ON(rtnl_dereference(local->monitor_sdata)); 1030 return; 1031 } 1032 1033 switch (sdata->vif.type) { 1034 case NL80211_IFTYPE_AP_VLAN: 1035 break; 1036 case NL80211_IFTYPE_MONITOR: 1037 if (local->monitors == 0) 1038 ieee80211_del_virtual_monitor(local); 1039 1040 mutex_lock(&local->mtx); 1041 ieee80211_recalc_idle(local); 1042 mutex_unlock(&local->mtx); 1043 1044 if (!(sdata->u.mntr.flags & MONITOR_FLAG_ACTIVE)) 1045 break; 1046 1047 /* fall through */ 1048 default: 1049 if (going_down) 1050 drv_remove_interface(local, sdata); 1051 } 1052 1053 ieee80211_recalc_ps(local); 1054 1055 if (cancel_scan) 1056 flush_delayed_work(&local->scan_work); 1057 1058 if (local->open_count == 0) { 1059 ieee80211_stop_device(local); 1060 1061 /* no reconfiguring after stop! */ 1062 return; 1063 } 1064 1065 /* do after stop to avoid reconfiguring when we stop anyway */ 1066 ieee80211_configure_filter(local); 1067 ieee80211_hw_config(local, hw_reconf_flags); 1068 1069 if (local->monitors == local->open_count) 1070 ieee80211_add_virtual_monitor(local); 1071 } 1072 1073 static int ieee80211_stop(struct net_device *dev) 1074 { 1075 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); 1076 1077 ieee80211_do_stop(sdata, true); 1078 1079 return 0; 1080 } 1081 1082 static void ieee80211_set_multicast_list(struct net_device *dev) 1083 { 1084 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); 1085 struct ieee80211_local *local = sdata->local; 1086 int allmulti, sdata_allmulti; 1087 1088 allmulti = !!(dev->flags & IFF_ALLMULTI); 1089 sdata_allmulti = !!(sdata->flags & IEEE80211_SDATA_ALLMULTI); 1090 1091 if (allmulti != sdata_allmulti) { 1092 if (dev->flags & IFF_ALLMULTI) 1093 atomic_inc(&local->iff_allmultis); 1094 else 1095 atomic_dec(&local->iff_allmultis); 1096 sdata->flags ^= IEEE80211_SDATA_ALLMULTI; 1097 } 1098 1099 spin_lock_bh(&local->filter_lock); 1100 __hw_addr_sync(&local->mc_list, &dev->mc, dev->addr_len); 1101 spin_unlock_bh(&local->filter_lock); 1102 ieee80211_queue_work(&local->hw, &local->reconfig_filter); 1103 } 1104 1105 /* 1106 * Called when the netdev is removed or, by the code below, before 1107 * the interface type changes. 1108 */ 1109 static void ieee80211_teardown_sdata(struct ieee80211_sub_if_data *sdata) 1110 { 1111 int i; 1112 1113 /* free extra data */ 1114 ieee80211_free_keys(sdata, false); 1115 1116 ieee80211_debugfs_remove_netdev(sdata); 1117 1118 for (i = 0; i < IEEE80211_FRAGMENT_MAX; i++) 1119 __skb_queue_purge(&sdata->fragments[i].skb_list); 1120 sdata->fragment_next = 0; 1121 1122 if (ieee80211_vif_is_mesh(&sdata->vif)) 1123 ieee80211_mesh_teardown_sdata(sdata); 1124 } 1125 1126 static void ieee80211_uninit(struct net_device *dev) 1127 { 1128 ieee80211_teardown_sdata(IEEE80211_DEV_TO_SUB_IF(dev)); 1129 } 1130 1131 static u16 ieee80211_netdev_select_queue(struct net_device *dev, 1132 struct sk_buff *skb, 1133 struct net_device *sb_dev) 1134 { 1135 return ieee80211_select_queue(IEEE80211_DEV_TO_SUB_IF(dev), skb); 1136 } 1137 1138 static void 1139 ieee80211_get_stats64(struct net_device *dev, struct rtnl_link_stats64 *stats) 1140 { 1141 int i; 1142 1143 for_each_possible_cpu(i) { 1144 const struct pcpu_sw_netstats *tstats; 1145 u64 rx_packets, rx_bytes, tx_packets, tx_bytes; 1146 unsigned int start; 1147 1148 tstats = per_cpu_ptr(dev->tstats, i); 1149 1150 do { 1151 start = u64_stats_fetch_begin_irq(&tstats->syncp); 1152 rx_packets = tstats->rx_packets; 1153 tx_packets = tstats->tx_packets; 1154 rx_bytes = tstats->rx_bytes; 1155 tx_bytes = tstats->tx_bytes; 1156 } while (u64_stats_fetch_retry_irq(&tstats->syncp, start)); 1157 1158 stats->rx_packets += rx_packets; 1159 stats->tx_packets += tx_packets; 1160 stats->rx_bytes += rx_bytes; 1161 stats->tx_bytes += tx_bytes; 1162 } 1163 } 1164 1165 static const struct net_device_ops ieee80211_dataif_ops = { 1166 .ndo_open = ieee80211_open, 1167 .ndo_stop = ieee80211_stop, 1168 .ndo_uninit = ieee80211_uninit, 1169 .ndo_start_xmit = ieee80211_subif_start_xmit, 1170 .ndo_set_rx_mode = ieee80211_set_multicast_list, 1171 .ndo_set_mac_address = ieee80211_change_mac, 1172 .ndo_select_queue = ieee80211_netdev_select_queue, 1173 .ndo_get_stats64 = ieee80211_get_stats64, 1174 }; 1175 1176 static u16 ieee80211_monitor_select_queue(struct net_device *dev, 1177 struct sk_buff *skb, 1178 struct net_device *sb_dev) 1179 { 1180 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); 1181 struct ieee80211_local *local = sdata->local; 1182 struct ieee80211_hdr *hdr; 1183 struct ieee80211_radiotap_header *rtap = (void *)skb->data; 1184 1185 if (local->hw.queues < IEEE80211_NUM_ACS) 1186 return 0; 1187 1188 if (skb->len < 4 || 1189 skb->len < le16_to_cpu(rtap->it_len) + 2 /* frame control */) 1190 return 0; /* doesn't matter, frame will be dropped */ 1191 1192 hdr = (void *)((u8 *)skb->data + le16_to_cpu(rtap->it_len)); 1193 1194 return ieee80211_select_queue_80211(sdata, skb, hdr); 1195 } 1196 1197 static const struct net_device_ops ieee80211_monitorif_ops = { 1198 .ndo_open = ieee80211_open, 1199 .ndo_stop = ieee80211_stop, 1200 .ndo_uninit = ieee80211_uninit, 1201 .ndo_start_xmit = ieee80211_monitor_start_xmit, 1202 .ndo_set_rx_mode = ieee80211_set_multicast_list, 1203 .ndo_set_mac_address = ieee80211_change_mac, 1204 .ndo_select_queue = ieee80211_monitor_select_queue, 1205 .ndo_get_stats64 = ieee80211_get_stats64, 1206 }; 1207 1208 static void ieee80211_if_free(struct net_device *dev) 1209 { 1210 free_percpu(dev->tstats); 1211 } 1212 1213 static void ieee80211_if_setup(struct net_device *dev) 1214 { 1215 ether_setup(dev); 1216 dev->priv_flags &= ~IFF_TX_SKB_SHARING; 1217 dev->netdev_ops = &ieee80211_dataif_ops; 1218 dev->needs_free_netdev = true; 1219 dev->priv_destructor = ieee80211_if_free; 1220 } 1221 1222 static void ieee80211_if_setup_no_queue(struct net_device *dev) 1223 { 1224 ieee80211_if_setup(dev); 1225 dev->priv_flags |= IFF_NO_QUEUE; 1226 } 1227 1228 static void ieee80211_iface_work(struct work_struct *work) 1229 { 1230 struct ieee80211_sub_if_data *sdata = 1231 container_of(work, struct ieee80211_sub_if_data, work); 1232 struct ieee80211_local *local = sdata->local; 1233 struct sk_buff *skb; 1234 struct sta_info *sta; 1235 1236 if (!ieee80211_sdata_running(sdata)) 1237 return; 1238 1239 if (test_bit(SCAN_SW_SCANNING, &local->scanning)) 1240 return; 1241 1242 if (!ieee80211_can_run_worker(local)) 1243 return; 1244 1245 /* first process frames */ 1246 while ((skb = skb_dequeue(&sdata->skb_queue))) { 1247 struct ieee80211_mgmt *mgmt = (void *)skb->data; 1248 1249 if (ieee80211_is_action(mgmt->frame_control) && 1250 mgmt->u.action.category == WLAN_CATEGORY_BACK) { 1251 int len = skb->len; 1252 1253 mutex_lock(&local->sta_mtx); 1254 sta = sta_info_get_bss(sdata, mgmt->sa); 1255 if (sta) { 1256 switch (mgmt->u.action.u.addba_req.action_code) { 1257 case WLAN_ACTION_ADDBA_REQ: 1258 ieee80211_process_addba_request( 1259 local, sta, mgmt, len); 1260 break; 1261 case WLAN_ACTION_ADDBA_RESP: 1262 ieee80211_process_addba_resp(local, sta, 1263 mgmt, len); 1264 break; 1265 case WLAN_ACTION_DELBA: 1266 ieee80211_process_delba(sdata, sta, 1267 mgmt, len); 1268 break; 1269 default: 1270 WARN_ON(1); 1271 break; 1272 } 1273 } 1274 mutex_unlock(&local->sta_mtx); 1275 } else if (ieee80211_is_action(mgmt->frame_control) && 1276 mgmt->u.action.category == WLAN_CATEGORY_VHT) { 1277 switch (mgmt->u.action.u.vht_group_notif.action_code) { 1278 case WLAN_VHT_ACTION_OPMODE_NOTIF: { 1279 struct ieee80211_rx_status *status; 1280 enum nl80211_band band; 1281 u8 opmode; 1282 1283 status = IEEE80211_SKB_RXCB(skb); 1284 band = status->band; 1285 opmode = mgmt->u.action.u.vht_opmode_notif.operating_mode; 1286 1287 mutex_lock(&local->sta_mtx); 1288 sta = sta_info_get_bss(sdata, mgmt->sa); 1289 1290 if (sta) 1291 ieee80211_vht_handle_opmode(sdata, sta, 1292 opmode, 1293 band); 1294 1295 mutex_unlock(&local->sta_mtx); 1296 break; 1297 } 1298 case WLAN_VHT_ACTION_GROUPID_MGMT: 1299 ieee80211_process_mu_groups(sdata, mgmt); 1300 break; 1301 default: 1302 WARN_ON(1); 1303 break; 1304 } 1305 } else if (ieee80211_is_data_qos(mgmt->frame_control)) { 1306 struct ieee80211_hdr *hdr = (void *)mgmt; 1307 /* 1308 * So the frame isn't mgmt, but frame_control 1309 * is at the right place anyway, of course, so 1310 * the if statement is correct. 1311 * 1312 * Warn if we have other data frame types here, 1313 * they must not get here. 1314 */ 1315 WARN_ON(hdr->frame_control & 1316 cpu_to_le16(IEEE80211_STYPE_NULLFUNC)); 1317 WARN_ON(!(hdr->seq_ctrl & 1318 cpu_to_le16(IEEE80211_SCTL_FRAG))); 1319 /* 1320 * This was a fragment of a frame, received while 1321 * a block-ack session was active. That cannot be 1322 * right, so terminate the session. 1323 */ 1324 mutex_lock(&local->sta_mtx); 1325 sta = sta_info_get_bss(sdata, mgmt->sa); 1326 if (sta) { 1327 u16 tid = ieee80211_get_tid(hdr); 1328 1329 __ieee80211_stop_rx_ba_session( 1330 sta, tid, WLAN_BACK_RECIPIENT, 1331 WLAN_REASON_QSTA_REQUIRE_SETUP, 1332 true); 1333 } 1334 mutex_unlock(&local->sta_mtx); 1335 } else switch (sdata->vif.type) { 1336 case NL80211_IFTYPE_STATION: 1337 ieee80211_sta_rx_queued_mgmt(sdata, skb); 1338 break; 1339 case NL80211_IFTYPE_ADHOC: 1340 ieee80211_ibss_rx_queued_mgmt(sdata, skb); 1341 break; 1342 case NL80211_IFTYPE_MESH_POINT: 1343 if (!ieee80211_vif_is_mesh(&sdata->vif)) 1344 break; 1345 ieee80211_mesh_rx_queued_mgmt(sdata, skb); 1346 break; 1347 default: 1348 WARN(1, "frame for unexpected interface type"); 1349 break; 1350 } 1351 1352 kfree_skb(skb); 1353 } 1354 1355 /* then other type-dependent work */ 1356 switch (sdata->vif.type) { 1357 case NL80211_IFTYPE_STATION: 1358 ieee80211_sta_work(sdata); 1359 break; 1360 case NL80211_IFTYPE_ADHOC: 1361 ieee80211_ibss_work(sdata); 1362 break; 1363 case NL80211_IFTYPE_MESH_POINT: 1364 if (!ieee80211_vif_is_mesh(&sdata->vif)) 1365 break; 1366 ieee80211_mesh_work(sdata); 1367 break; 1368 case NL80211_IFTYPE_OCB: 1369 ieee80211_ocb_work(sdata); 1370 break; 1371 default: 1372 break; 1373 } 1374 } 1375 1376 static void ieee80211_recalc_smps_work(struct work_struct *work) 1377 { 1378 struct ieee80211_sub_if_data *sdata = 1379 container_of(work, struct ieee80211_sub_if_data, recalc_smps); 1380 1381 ieee80211_recalc_smps(sdata); 1382 } 1383 1384 /* 1385 * Helper function to initialise an interface to a specific type. 1386 */ 1387 static void ieee80211_setup_sdata(struct ieee80211_sub_if_data *sdata, 1388 enum nl80211_iftype type) 1389 { 1390 static const u8 bssid_wildcard[ETH_ALEN] = {0xff, 0xff, 0xff, 1391 0xff, 0xff, 0xff}; 1392 1393 /* clear type-dependent union */ 1394 memset(&sdata->u, 0, sizeof(sdata->u)); 1395 1396 /* and set some type-dependent values */ 1397 sdata->vif.type = type; 1398 sdata->vif.p2p = false; 1399 sdata->wdev.iftype = type; 1400 1401 sdata->control_port_protocol = cpu_to_be16(ETH_P_PAE); 1402 sdata->control_port_no_encrypt = false; 1403 sdata->encrypt_headroom = IEEE80211_ENCRYPT_HEADROOM; 1404 sdata->vif.bss_conf.idle = true; 1405 1406 sdata->noack_map = 0; 1407 1408 /* only monitor/p2p-device differ */ 1409 if (sdata->dev) { 1410 sdata->dev->netdev_ops = &ieee80211_dataif_ops; 1411 sdata->dev->type = ARPHRD_ETHER; 1412 } 1413 1414 skb_queue_head_init(&sdata->skb_queue); 1415 INIT_WORK(&sdata->work, ieee80211_iface_work); 1416 INIT_WORK(&sdata->recalc_smps, ieee80211_recalc_smps_work); 1417 INIT_WORK(&sdata->csa_finalize_work, ieee80211_csa_finalize_work); 1418 INIT_LIST_HEAD(&sdata->assigned_chanctx_list); 1419 INIT_LIST_HEAD(&sdata->reserved_chanctx_list); 1420 1421 switch (type) { 1422 case NL80211_IFTYPE_P2P_GO: 1423 type = NL80211_IFTYPE_AP; 1424 sdata->vif.type = type; 1425 sdata->vif.p2p = true; 1426 /* fall through */ 1427 case NL80211_IFTYPE_AP: 1428 skb_queue_head_init(&sdata->u.ap.ps.bc_buf); 1429 INIT_LIST_HEAD(&sdata->u.ap.vlans); 1430 INIT_WORK(&sdata->u.ap.request_smps_work, 1431 ieee80211_request_smps_ap_work); 1432 sdata->vif.bss_conf.bssid = sdata->vif.addr; 1433 sdata->u.ap.req_smps = IEEE80211_SMPS_OFF; 1434 break; 1435 case NL80211_IFTYPE_P2P_CLIENT: 1436 type = NL80211_IFTYPE_STATION; 1437 sdata->vif.type = type; 1438 sdata->vif.p2p = true; 1439 /* fall through */ 1440 case NL80211_IFTYPE_STATION: 1441 sdata->vif.bss_conf.bssid = sdata->u.mgd.bssid; 1442 ieee80211_sta_setup_sdata(sdata); 1443 break; 1444 case NL80211_IFTYPE_OCB: 1445 sdata->vif.bss_conf.bssid = bssid_wildcard; 1446 ieee80211_ocb_setup_sdata(sdata); 1447 break; 1448 case NL80211_IFTYPE_ADHOC: 1449 sdata->vif.bss_conf.bssid = sdata->u.ibss.bssid; 1450 ieee80211_ibss_setup_sdata(sdata); 1451 break; 1452 case NL80211_IFTYPE_MESH_POINT: 1453 if (ieee80211_vif_is_mesh(&sdata->vif)) 1454 ieee80211_mesh_init_sdata(sdata); 1455 break; 1456 case NL80211_IFTYPE_MONITOR: 1457 sdata->dev->type = ARPHRD_IEEE80211_RADIOTAP; 1458 sdata->dev->netdev_ops = &ieee80211_monitorif_ops; 1459 sdata->u.mntr.flags = MONITOR_FLAG_CONTROL | 1460 MONITOR_FLAG_OTHER_BSS; 1461 break; 1462 case NL80211_IFTYPE_WDS: 1463 sdata->vif.bss_conf.bssid = NULL; 1464 break; 1465 case NL80211_IFTYPE_NAN: 1466 idr_init(&sdata->u.nan.function_inst_ids); 1467 spin_lock_init(&sdata->u.nan.func_lock); 1468 sdata->vif.bss_conf.bssid = sdata->vif.addr; 1469 break; 1470 case NL80211_IFTYPE_AP_VLAN: 1471 case NL80211_IFTYPE_P2P_DEVICE: 1472 sdata->vif.bss_conf.bssid = sdata->vif.addr; 1473 break; 1474 case NL80211_IFTYPE_UNSPECIFIED: 1475 case NUM_NL80211_IFTYPES: 1476 WARN_ON(1); 1477 break; 1478 } 1479 1480 ieee80211_debugfs_add_netdev(sdata); 1481 } 1482 1483 static int ieee80211_runtime_change_iftype(struct ieee80211_sub_if_data *sdata, 1484 enum nl80211_iftype type) 1485 { 1486 struct ieee80211_local *local = sdata->local; 1487 int ret, err; 1488 enum nl80211_iftype internal_type = type; 1489 bool p2p = false; 1490 1491 ASSERT_RTNL(); 1492 1493 if (!local->ops->change_interface) 1494 return -EBUSY; 1495 1496 switch (sdata->vif.type) { 1497 case NL80211_IFTYPE_AP: 1498 case NL80211_IFTYPE_STATION: 1499 case NL80211_IFTYPE_ADHOC: 1500 case NL80211_IFTYPE_OCB: 1501 /* 1502 * Could maybe also all others here? 1503 * Just not sure how that interacts 1504 * with the RX/config path e.g. for 1505 * mesh. 1506 */ 1507 break; 1508 default: 1509 return -EBUSY; 1510 } 1511 1512 switch (type) { 1513 case NL80211_IFTYPE_AP: 1514 case NL80211_IFTYPE_STATION: 1515 case NL80211_IFTYPE_ADHOC: 1516 case NL80211_IFTYPE_OCB: 1517 /* 1518 * Could probably support everything 1519 * but WDS here (WDS do_open can fail 1520 * under memory pressure, which this 1521 * code isn't prepared to handle). 1522 */ 1523 break; 1524 case NL80211_IFTYPE_P2P_CLIENT: 1525 p2p = true; 1526 internal_type = NL80211_IFTYPE_STATION; 1527 break; 1528 case NL80211_IFTYPE_P2P_GO: 1529 p2p = true; 1530 internal_type = NL80211_IFTYPE_AP; 1531 break; 1532 default: 1533 return -EBUSY; 1534 } 1535 1536 ret = ieee80211_check_concurrent_iface(sdata, internal_type); 1537 if (ret) 1538 return ret; 1539 1540 ieee80211_do_stop(sdata, false); 1541 1542 ieee80211_teardown_sdata(sdata); 1543 1544 ret = drv_change_interface(local, sdata, internal_type, p2p); 1545 if (ret) 1546 type = ieee80211_vif_type_p2p(&sdata->vif); 1547 1548 /* 1549 * Ignore return value here, there's not much we can do since 1550 * the driver changed the interface type internally already. 1551 * The warnings will hopefully make driver authors fix it :-) 1552 */ 1553 ieee80211_check_queues(sdata, type); 1554 1555 ieee80211_setup_sdata(sdata, type); 1556 1557 err = ieee80211_do_open(&sdata->wdev, false); 1558 WARN(err, "type change: do_open returned %d", err); 1559 1560 return ret; 1561 } 1562 1563 int ieee80211_if_change_type(struct ieee80211_sub_if_data *sdata, 1564 enum nl80211_iftype type) 1565 { 1566 int ret; 1567 1568 ASSERT_RTNL(); 1569 1570 if (type == ieee80211_vif_type_p2p(&sdata->vif)) 1571 return 0; 1572 1573 if (ieee80211_sdata_running(sdata)) { 1574 ret = ieee80211_runtime_change_iftype(sdata, type); 1575 if (ret) 1576 return ret; 1577 } else { 1578 /* Purge and reset type-dependent state. */ 1579 ieee80211_teardown_sdata(sdata); 1580 ieee80211_setup_sdata(sdata, type); 1581 } 1582 1583 /* reset some values that shouldn't be kept across type changes */ 1584 if (type == NL80211_IFTYPE_STATION) 1585 sdata->u.mgd.use_4addr = false; 1586 1587 return 0; 1588 } 1589 1590 static void ieee80211_assign_perm_addr(struct ieee80211_local *local, 1591 u8 *perm_addr, enum nl80211_iftype type) 1592 { 1593 struct ieee80211_sub_if_data *sdata; 1594 u64 mask, start, addr, val, inc; 1595 u8 *m; 1596 u8 tmp_addr[ETH_ALEN]; 1597 int i; 1598 1599 /* default ... something at least */ 1600 memcpy(perm_addr, local->hw.wiphy->perm_addr, ETH_ALEN); 1601 1602 if (is_zero_ether_addr(local->hw.wiphy->addr_mask) && 1603 local->hw.wiphy->n_addresses <= 1) 1604 return; 1605 1606 mutex_lock(&local->iflist_mtx); 1607 1608 switch (type) { 1609 case NL80211_IFTYPE_MONITOR: 1610 /* doesn't matter */ 1611 break; 1612 case NL80211_IFTYPE_WDS: 1613 case NL80211_IFTYPE_AP_VLAN: 1614 /* match up with an AP interface */ 1615 list_for_each_entry(sdata, &local->interfaces, list) { 1616 if (sdata->vif.type != NL80211_IFTYPE_AP) 1617 continue; 1618 memcpy(perm_addr, sdata->vif.addr, ETH_ALEN); 1619 break; 1620 } 1621 /* keep default if no AP interface present */ 1622 break; 1623 case NL80211_IFTYPE_P2P_CLIENT: 1624 case NL80211_IFTYPE_P2P_GO: 1625 if (ieee80211_hw_check(&local->hw, P2P_DEV_ADDR_FOR_INTF)) { 1626 list_for_each_entry(sdata, &local->interfaces, list) { 1627 if (sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE) 1628 continue; 1629 if (!ieee80211_sdata_running(sdata)) 1630 continue; 1631 memcpy(perm_addr, sdata->vif.addr, ETH_ALEN); 1632 goto out_unlock; 1633 } 1634 } 1635 /* fall through */ 1636 default: 1637 /* assign a new address if possible -- try n_addresses first */ 1638 for (i = 0; i < local->hw.wiphy->n_addresses; i++) { 1639 bool used = false; 1640 1641 list_for_each_entry(sdata, &local->interfaces, list) { 1642 if (ether_addr_equal(local->hw.wiphy->addresses[i].addr, 1643 sdata->vif.addr)) { 1644 used = true; 1645 break; 1646 } 1647 } 1648 1649 if (!used) { 1650 memcpy(perm_addr, 1651 local->hw.wiphy->addresses[i].addr, 1652 ETH_ALEN); 1653 break; 1654 } 1655 } 1656 1657 /* try mask if available */ 1658 if (is_zero_ether_addr(local->hw.wiphy->addr_mask)) 1659 break; 1660 1661 m = local->hw.wiphy->addr_mask; 1662 mask = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) | 1663 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) | 1664 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8); 1665 1666 if (__ffs64(mask) + hweight64(mask) != fls64(mask)) { 1667 /* not a contiguous mask ... not handled now! */ 1668 pr_info("not contiguous\n"); 1669 break; 1670 } 1671 1672 /* 1673 * Pick address of existing interface in case user changed 1674 * MAC address manually, default to perm_addr. 1675 */ 1676 m = local->hw.wiphy->perm_addr; 1677 list_for_each_entry(sdata, &local->interfaces, list) { 1678 if (sdata->vif.type == NL80211_IFTYPE_MONITOR) 1679 continue; 1680 m = sdata->vif.addr; 1681 break; 1682 } 1683 start = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) | 1684 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) | 1685 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8); 1686 1687 inc = 1ULL<<__ffs64(mask); 1688 val = (start & mask); 1689 addr = (start & ~mask) | (val & mask); 1690 do { 1691 bool used = false; 1692 1693 tmp_addr[5] = addr >> 0*8; 1694 tmp_addr[4] = addr >> 1*8; 1695 tmp_addr[3] = addr >> 2*8; 1696 tmp_addr[2] = addr >> 3*8; 1697 tmp_addr[1] = addr >> 4*8; 1698 tmp_addr[0] = addr >> 5*8; 1699 1700 val += inc; 1701 1702 list_for_each_entry(sdata, &local->interfaces, list) { 1703 if (ether_addr_equal(tmp_addr, sdata->vif.addr)) { 1704 used = true; 1705 break; 1706 } 1707 } 1708 1709 if (!used) { 1710 memcpy(perm_addr, tmp_addr, ETH_ALEN); 1711 break; 1712 } 1713 addr = (start & ~mask) | (val & mask); 1714 } while (addr != start); 1715 1716 break; 1717 } 1718 1719 out_unlock: 1720 mutex_unlock(&local->iflist_mtx); 1721 } 1722 1723 int ieee80211_if_add(struct ieee80211_local *local, const char *name, 1724 unsigned char name_assign_type, 1725 struct wireless_dev **new_wdev, enum nl80211_iftype type, 1726 struct vif_params *params) 1727 { 1728 struct net_device *ndev = NULL; 1729 struct ieee80211_sub_if_data *sdata = NULL; 1730 struct txq_info *txqi; 1731 void (*if_setup)(struct net_device *dev); 1732 int ret, i; 1733 int txqs = 1; 1734 1735 ASSERT_RTNL(); 1736 1737 if (type == NL80211_IFTYPE_P2P_DEVICE || type == NL80211_IFTYPE_NAN) { 1738 struct wireless_dev *wdev; 1739 1740 sdata = kzalloc(sizeof(*sdata) + local->hw.vif_data_size, 1741 GFP_KERNEL); 1742 if (!sdata) 1743 return -ENOMEM; 1744 wdev = &sdata->wdev; 1745 1746 sdata->dev = NULL; 1747 strlcpy(sdata->name, name, IFNAMSIZ); 1748 ieee80211_assign_perm_addr(local, wdev->address, type); 1749 memcpy(sdata->vif.addr, wdev->address, ETH_ALEN); 1750 } else { 1751 int size = ALIGN(sizeof(*sdata) + local->hw.vif_data_size, 1752 sizeof(void *)); 1753 int txq_size = 0; 1754 1755 if (local->ops->wake_tx_queue && 1756 type != NL80211_IFTYPE_AP_VLAN && 1757 (type != NL80211_IFTYPE_MONITOR || 1758 (params->flags & MONITOR_FLAG_ACTIVE))) 1759 txq_size += sizeof(struct txq_info) + 1760 local->hw.txq_data_size; 1761 1762 if (local->ops->wake_tx_queue) { 1763 if_setup = ieee80211_if_setup_no_queue; 1764 } else { 1765 if_setup = ieee80211_if_setup; 1766 if (local->hw.queues >= IEEE80211_NUM_ACS) 1767 txqs = IEEE80211_NUM_ACS; 1768 } 1769 1770 ndev = alloc_netdev_mqs(size + txq_size, 1771 name, name_assign_type, 1772 if_setup, txqs, 1); 1773 if (!ndev) 1774 return -ENOMEM; 1775 dev_net_set(ndev, wiphy_net(local->hw.wiphy)); 1776 1777 ndev->tstats = netdev_alloc_pcpu_stats(struct pcpu_sw_netstats); 1778 if (!ndev->tstats) { 1779 free_netdev(ndev); 1780 return -ENOMEM; 1781 } 1782 1783 ndev->needed_headroom = local->tx_headroom + 1784 4*6 /* four MAC addresses */ 1785 + 2 + 2 + 2 + 2 /* ctl, dur, seq, qos */ 1786 + 6 /* mesh */ 1787 + 8 /* rfc1042/bridge tunnel */ 1788 - ETH_HLEN /* ethernet hard_header_len */ 1789 + IEEE80211_ENCRYPT_HEADROOM; 1790 ndev->needed_tailroom = IEEE80211_ENCRYPT_TAILROOM; 1791 1792 ret = dev_alloc_name(ndev, ndev->name); 1793 if (ret < 0) { 1794 ieee80211_if_free(ndev); 1795 free_netdev(ndev); 1796 return ret; 1797 } 1798 1799 ieee80211_assign_perm_addr(local, ndev->perm_addr, type); 1800 if (is_valid_ether_addr(params->macaddr)) 1801 memcpy(ndev->dev_addr, params->macaddr, ETH_ALEN); 1802 else 1803 memcpy(ndev->dev_addr, ndev->perm_addr, ETH_ALEN); 1804 SET_NETDEV_DEV(ndev, wiphy_dev(local->hw.wiphy)); 1805 1806 /* don't use IEEE80211_DEV_TO_SUB_IF -- it checks too much */ 1807 sdata = netdev_priv(ndev); 1808 ndev->ieee80211_ptr = &sdata->wdev; 1809 memcpy(sdata->vif.addr, ndev->dev_addr, ETH_ALEN); 1810 memcpy(sdata->name, ndev->name, IFNAMSIZ); 1811 1812 if (txq_size) { 1813 txqi = netdev_priv(ndev) + size; 1814 ieee80211_txq_init(sdata, NULL, txqi, 0); 1815 } 1816 1817 sdata->dev = ndev; 1818 } 1819 1820 /* initialise type-independent data */ 1821 sdata->wdev.wiphy = local->hw.wiphy; 1822 sdata->local = local; 1823 1824 for (i = 0; i < IEEE80211_FRAGMENT_MAX; i++) 1825 skb_queue_head_init(&sdata->fragments[i].skb_list); 1826 1827 INIT_LIST_HEAD(&sdata->key_list); 1828 1829 INIT_DELAYED_WORK(&sdata->dfs_cac_timer_work, 1830 ieee80211_dfs_cac_timer_work); 1831 INIT_DELAYED_WORK(&sdata->dec_tailroom_needed_wk, 1832 ieee80211_delayed_tailroom_dec); 1833 1834 for (i = 0; i < NUM_NL80211_BANDS; i++) { 1835 struct ieee80211_supported_band *sband; 1836 sband = local->hw.wiphy->bands[i]; 1837 sdata->rc_rateidx_mask[i] = 1838 sband ? (1 << sband->n_bitrates) - 1 : 0; 1839 if (sband) { 1840 __le16 cap; 1841 u16 *vht_rate_mask; 1842 1843 memcpy(sdata->rc_rateidx_mcs_mask[i], 1844 sband->ht_cap.mcs.rx_mask, 1845 sizeof(sdata->rc_rateidx_mcs_mask[i])); 1846 1847 cap = sband->vht_cap.vht_mcs.rx_mcs_map; 1848 vht_rate_mask = sdata->rc_rateidx_vht_mcs_mask[i]; 1849 ieee80211_get_vht_mask_from_cap(cap, vht_rate_mask); 1850 } else { 1851 memset(sdata->rc_rateidx_mcs_mask[i], 0, 1852 sizeof(sdata->rc_rateidx_mcs_mask[i])); 1853 memset(sdata->rc_rateidx_vht_mcs_mask[i], 0, 1854 sizeof(sdata->rc_rateidx_vht_mcs_mask[i])); 1855 } 1856 } 1857 1858 ieee80211_set_default_queues(sdata); 1859 1860 sdata->ap_power_level = IEEE80211_UNSET_POWER_LEVEL; 1861 sdata->user_power_level = local->user_power_level; 1862 1863 sdata->encrypt_headroom = IEEE80211_ENCRYPT_HEADROOM; 1864 1865 /* setup type-dependent data */ 1866 ieee80211_setup_sdata(sdata, type); 1867 1868 if (ndev) { 1869 ndev->ieee80211_ptr->use_4addr = params->use_4addr; 1870 if (type == NL80211_IFTYPE_STATION) 1871 sdata->u.mgd.use_4addr = params->use_4addr; 1872 1873 ndev->features |= local->hw.netdev_features; 1874 1875 netdev_set_default_ethtool_ops(ndev, &ieee80211_ethtool_ops); 1876 1877 /* MTU range: 256 - 2304 */ 1878 ndev->min_mtu = 256; 1879 ndev->max_mtu = IEEE80211_MAX_DATA_LEN; 1880 1881 ret = register_netdevice(ndev); 1882 if (ret) { 1883 free_netdev(ndev); 1884 return ret; 1885 } 1886 } 1887 1888 mutex_lock(&local->iflist_mtx); 1889 list_add_tail_rcu(&sdata->list, &local->interfaces); 1890 mutex_unlock(&local->iflist_mtx); 1891 1892 if (new_wdev) 1893 *new_wdev = &sdata->wdev; 1894 1895 return 0; 1896 } 1897 1898 void ieee80211_if_remove(struct ieee80211_sub_if_data *sdata) 1899 { 1900 ASSERT_RTNL(); 1901 1902 mutex_lock(&sdata->local->iflist_mtx); 1903 list_del_rcu(&sdata->list); 1904 mutex_unlock(&sdata->local->iflist_mtx); 1905 1906 if (sdata->vif.txq) 1907 ieee80211_txq_purge(sdata->local, to_txq_info(sdata->vif.txq)); 1908 1909 synchronize_rcu(); 1910 1911 if (sdata->dev) { 1912 unregister_netdevice(sdata->dev); 1913 } else { 1914 cfg80211_unregister_wdev(&sdata->wdev); 1915 ieee80211_teardown_sdata(sdata); 1916 kfree(sdata); 1917 } 1918 } 1919 1920 void ieee80211_sdata_stop(struct ieee80211_sub_if_data *sdata) 1921 { 1922 if (WARN_ON_ONCE(!test_bit(SDATA_STATE_RUNNING, &sdata->state))) 1923 return; 1924 ieee80211_do_stop(sdata, true); 1925 } 1926 1927 void ieee80211_remove_interfaces(struct ieee80211_local *local) 1928 { 1929 struct ieee80211_sub_if_data *sdata, *tmp; 1930 LIST_HEAD(unreg_list); 1931 LIST_HEAD(wdev_list); 1932 1933 ASSERT_RTNL(); 1934 1935 /* Before destroying the interfaces, make sure they're all stopped so 1936 * that the hardware is stopped. Otherwise, the driver might still be 1937 * iterating the interfaces during the shutdown, e.g. from a worker 1938 * or from RX processing or similar, and if it does so (using atomic 1939 * iteration) while we're manipulating the list, the iteration will 1940 * crash. 1941 * 1942 * After this, the hardware should be stopped and the driver should 1943 * have stopped all of its activities, so that we can do RCU-unaware 1944 * manipulations of the interface list below. 1945 */ 1946 cfg80211_shutdown_all_interfaces(local->hw.wiphy); 1947 1948 WARN(local->open_count, "%s: open count remains %d\n", 1949 wiphy_name(local->hw.wiphy), local->open_count); 1950 1951 ieee80211_txq_teardown_flows(local); 1952 1953 mutex_lock(&local->iflist_mtx); 1954 list_for_each_entry_safe(sdata, tmp, &local->interfaces, list) { 1955 list_del(&sdata->list); 1956 1957 if (sdata->dev) 1958 unregister_netdevice_queue(sdata->dev, &unreg_list); 1959 else 1960 list_add(&sdata->list, &wdev_list); 1961 } 1962 mutex_unlock(&local->iflist_mtx); 1963 unregister_netdevice_many(&unreg_list); 1964 1965 list_for_each_entry_safe(sdata, tmp, &wdev_list, list) { 1966 list_del(&sdata->list); 1967 cfg80211_unregister_wdev(&sdata->wdev); 1968 kfree(sdata); 1969 } 1970 } 1971 1972 static int netdev_notify(struct notifier_block *nb, 1973 unsigned long state, void *ptr) 1974 { 1975 struct net_device *dev = netdev_notifier_info_to_dev(ptr); 1976 struct ieee80211_sub_if_data *sdata; 1977 1978 if (state != NETDEV_CHANGENAME) 1979 return NOTIFY_DONE; 1980 1981 if (!dev->ieee80211_ptr || !dev->ieee80211_ptr->wiphy) 1982 return NOTIFY_DONE; 1983 1984 if (dev->ieee80211_ptr->wiphy->privid != mac80211_wiphy_privid) 1985 return NOTIFY_DONE; 1986 1987 sdata = IEEE80211_DEV_TO_SUB_IF(dev); 1988 memcpy(sdata->name, dev->name, IFNAMSIZ); 1989 ieee80211_debugfs_rename_netdev(sdata); 1990 1991 return NOTIFY_OK; 1992 } 1993 1994 static struct notifier_block mac80211_netdev_notifier = { 1995 .notifier_call = netdev_notify, 1996 }; 1997 1998 int ieee80211_iface_init(void) 1999 { 2000 return register_netdevice_notifier(&mac80211_netdev_notifier); 2001 } 2002 2003 void ieee80211_iface_exit(void) 2004 { 2005 unregister_netdevice_notifier(&mac80211_netdev_notifier); 2006 } 2007 2008 void ieee80211_vif_inc_num_mcast(struct ieee80211_sub_if_data *sdata) 2009 { 2010 if (sdata->vif.type == NL80211_IFTYPE_AP) 2011 atomic_inc(&sdata->u.ap.num_mcast_sta); 2012 else if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) 2013 atomic_inc(&sdata->u.vlan.num_mcast_sta); 2014 } 2015 2016 void ieee80211_vif_dec_num_mcast(struct ieee80211_sub_if_data *sdata) 2017 { 2018 if (sdata->vif.type == NL80211_IFTYPE_AP) 2019 atomic_dec(&sdata->u.ap.num_mcast_sta); 2020 else if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) 2021 atomic_dec(&sdata->u.vlan.num_mcast_sta); 2022 } 2023