1 /* 2 * Interface handling 3 * 4 * Copyright 2002-2005, Instant802 Networks, Inc. 5 * Copyright 2005-2006, Devicescape Software, Inc. 6 * Copyright (c) 2006 Jiri Benc <jbenc@suse.cz> 7 * Copyright 2008, Johannes Berg <johannes@sipsolutions.net> 8 * Copyright 2013-2014 Intel Mobile Communications GmbH 9 * Copyright (c) 2016 Intel Deutschland GmbH 10 * 11 * This program is free software; you can redistribute it and/or modify 12 * it under the terms of the GNU General Public License version 2 as 13 * published by the Free Software Foundation. 14 */ 15 #include <linux/slab.h> 16 #include <linux/kernel.h> 17 #include <linux/if_arp.h> 18 #include <linux/netdevice.h> 19 #include <linux/rtnetlink.h> 20 #include <net/mac80211.h> 21 #include <net/ieee80211_radiotap.h> 22 #include "ieee80211_i.h" 23 #include "sta_info.h" 24 #include "debugfs_netdev.h" 25 #include "mesh.h" 26 #include "led.h" 27 #include "driver-ops.h" 28 #include "wme.h" 29 #include "rate.h" 30 31 /** 32 * DOC: Interface list locking 33 * 34 * The interface list in each struct ieee80211_local is protected 35 * three-fold: 36 * 37 * (1) modifications may only be done under the RTNL 38 * (2) modifications and readers are protected against each other by 39 * the iflist_mtx. 40 * (3) modifications are done in an RCU manner so atomic readers 41 * can traverse the list in RCU-safe blocks. 42 * 43 * As a consequence, reads (traversals) of the list can be protected 44 * by either the RTNL, the iflist_mtx or RCU. 45 */ 46 47 static void ieee80211_iface_work(struct work_struct *work); 48 49 bool __ieee80211_recalc_txpower(struct ieee80211_sub_if_data *sdata) 50 { 51 struct ieee80211_chanctx_conf *chanctx_conf; 52 int power; 53 54 rcu_read_lock(); 55 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf); 56 if (!chanctx_conf) { 57 rcu_read_unlock(); 58 return false; 59 } 60 61 power = ieee80211_chandef_max_power(&chanctx_conf->def); 62 rcu_read_unlock(); 63 64 if (sdata->user_power_level != IEEE80211_UNSET_POWER_LEVEL) 65 power = min(power, sdata->user_power_level); 66 67 if (sdata->ap_power_level != IEEE80211_UNSET_POWER_LEVEL) 68 power = min(power, sdata->ap_power_level); 69 70 if (power != sdata->vif.bss_conf.txpower) { 71 sdata->vif.bss_conf.txpower = power; 72 ieee80211_hw_config(sdata->local, 0); 73 return true; 74 } 75 76 return false; 77 } 78 79 void ieee80211_recalc_txpower(struct ieee80211_sub_if_data *sdata, 80 bool update_bss) 81 { 82 if (__ieee80211_recalc_txpower(sdata) || 83 (update_bss && ieee80211_sdata_running(sdata))) 84 ieee80211_bss_info_change_notify(sdata, 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); 225 226 return ret; 227 } 228 229 static inline int identical_mac_addr_allowed(int type1, int type2) 230 { 231 return type1 == NL80211_IFTYPE_MONITOR || 232 type2 == NL80211_IFTYPE_MONITOR || 233 type1 == NL80211_IFTYPE_P2P_DEVICE || 234 type2 == NL80211_IFTYPE_P2P_DEVICE || 235 (type1 == NL80211_IFTYPE_AP && type2 == NL80211_IFTYPE_WDS) || 236 (type1 == NL80211_IFTYPE_WDS && 237 (type2 == NL80211_IFTYPE_WDS || 238 type2 == NL80211_IFTYPE_AP)) || 239 (type1 == NL80211_IFTYPE_AP && type2 == NL80211_IFTYPE_AP_VLAN) || 240 (type1 == NL80211_IFTYPE_AP_VLAN && 241 (type2 == NL80211_IFTYPE_AP || 242 type2 == NL80211_IFTYPE_AP_VLAN)); 243 } 244 245 static int ieee80211_check_concurrent_iface(struct ieee80211_sub_if_data *sdata, 246 enum nl80211_iftype iftype) 247 { 248 struct ieee80211_local *local = sdata->local; 249 struct ieee80211_sub_if_data *nsdata; 250 int ret; 251 252 ASSERT_RTNL(); 253 254 /* we hold the RTNL here so can safely walk the list */ 255 list_for_each_entry(nsdata, &local->interfaces, list) { 256 if (nsdata != sdata && ieee80211_sdata_running(nsdata)) { 257 /* 258 * Only OCB and monitor mode may coexist 259 */ 260 if ((sdata->vif.type == NL80211_IFTYPE_OCB && 261 nsdata->vif.type != NL80211_IFTYPE_MONITOR) || 262 (sdata->vif.type != NL80211_IFTYPE_MONITOR && 263 nsdata->vif.type == NL80211_IFTYPE_OCB)) 264 return -EBUSY; 265 266 /* 267 * Allow only a single IBSS interface to be up at any 268 * time. This is restricted because beacon distribution 269 * cannot work properly if both are in the same IBSS. 270 * 271 * To remove this restriction we'd have to disallow them 272 * from setting the same SSID on different IBSS interfaces 273 * belonging to the same hardware. Then, however, we're 274 * faced with having to adopt two different TSF timers... 275 */ 276 if (iftype == NL80211_IFTYPE_ADHOC && 277 nsdata->vif.type == NL80211_IFTYPE_ADHOC) 278 return -EBUSY; 279 /* 280 * will not add another interface while any channel 281 * switch is active. 282 */ 283 if (nsdata->vif.csa_active) 284 return -EBUSY; 285 286 /* 287 * The remaining checks are only performed for interfaces 288 * with the same MAC address. 289 */ 290 if (!ether_addr_equal(sdata->vif.addr, 291 nsdata->vif.addr)) 292 continue; 293 294 /* 295 * check whether it may have the same address 296 */ 297 if (!identical_mac_addr_allowed(iftype, 298 nsdata->vif.type)) 299 return -ENOTUNIQ; 300 301 /* 302 * can only add VLANs to enabled APs 303 */ 304 if (iftype == NL80211_IFTYPE_AP_VLAN && 305 nsdata->vif.type == NL80211_IFTYPE_AP) 306 sdata->bss = &nsdata->u.ap; 307 } 308 } 309 310 mutex_lock(&local->chanctx_mtx); 311 ret = ieee80211_check_combinations(sdata, NULL, 0, 0); 312 mutex_unlock(&local->chanctx_mtx); 313 return ret; 314 } 315 316 static int ieee80211_check_queues(struct ieee80211_sub_if_data *sdata, 317 enum nl80211_iftype iftype) 318 { 319 int n_queues = sdata->local->hw.queues; 320 int i; 321 322 if (iftype == NL80211_IFTYPE_NAN) 323 return 0; 324 325 if (iftype != NL80211_IFTYPE_P2P_DEVICE) { 326 for (i = 0; i < IEEE80211_NUM_ACS; i++) { 327 if (WARN_ON_ONCE(sdata->vif.hw_queue[i] == 328 IEEE80211_INVAL_HW_QUEUE)) 329 return -EINVAL; 330 if (WARN_ON_ONCE(sdata->vif.hw_queue[i] >= 331 n_queues)) 332 return -EINVAL; 333 } 334 } 335 336 if ((iftype != NL80211_IFTYPE_AP && 337 iftype != NL80211_IFTYPE_P2P_GO && 338 iftype != NL80211_IFTYPE_MESH_POINT) || 339 !ieee80211_hw_check(&sdata->local->hw, QUEUE_CONTROL)) { 340 sdata->vif.cab_queue = IEEE80211_INVAL_HW_QUEUE; 341 return 0; 342 } 343 344 if (WARN_ON_ONCE(sdata->vif.cab_queue == IEEE80211_INVAL_HW_QUEUE)) 345 return -EINVAL; 346 347 if (WARN_ON_ONCE(sdata->vif.cab_queue >= n_queues)) 348 return -EINVAL; 349 350 return 0; 351 } 352 353 void ieee80211_adjust_monitor_flags(struct ieee80211_sub_if_data *sdata, 354 const int offset) 355 { 356 struct ieee80211_local *local = sdata->local; 357 u32 flags = sdata->u.mntr.flags; 358 359 #define ADJUST(_f, _s) do { \ 360 if (flags & MONITOR_FLAG_##_f) \ 361 local->fif_##_s += offset; \ 362 } while (0) 363 364 ADJUST(FCSFAIL, fcsfail); 365 ADJUST(PLCPFAIL, plcpfail); 366 ADJUST(CONTROL, control); 367 ADJUST(CONTROL, pspoll); 368 ADJUST(OTHER_BSS, other_bss); 369 370 #undef ADJUST 371 } 372 373 static void ieee80211_set_default_queues(struct ieee80211_sub_if_data *sdata) 374 { 375 struct ieee80211_local *local = sdata->local; 376 int i; 377 378 for (i = 0; i < IEEE80211_NUM_ACS; i++) { 379 if (ieee80211_hw_check(&local->hw, QUEUE_CONTROL)) 380 sdata->vif.hw_queue[i] = IEEE80211_INVAL_HW_QUEUE; 381 else if (local->hw.queues >= IEEE80211_NUM_ACS) 382 sdata->vif.hw_queue[i] = i; 383 else 384 sdata->vif.hw_queue[i] = 0; 385 } 386 sdata->vif.cab_queue = IEEE80211_INVAL_HW_QUEUE; 387 } 388 389 int ieee80211_add_virtual_monitor(struct ieee80211_local *local) 390 { 391 struct ieee80211_sub_if_data *sdata; 392 int ret; 393 394 if (!ieee80211_hw_check(&local->hw, WANT_MONITOR_VIF)) 395 return 0; 396 397 ASSERT_RTNL(); 398 399 if (local->monitor_sdata) 400 return 0; 401 402 sdata = kzalloc(sizeof(*sdata) + local->hw.vif_data_size, GFP_KERNEL); 403 if (!sdata) 404 return -ENOMEM; 405 406 /* set up data */ 407 sdata->local = local; 408 sdata->vif.type = NL80211_IFTYPE_MONITOR; 409 snprintf(sdata->name, IFNAMSIZ, "%s-monitor", 410 wiphy_name(local->hw.wiphy)); 411 sdata->wdev.iftype = NL80211_IFTYPE_MONITOR; 412 413 sdata->encrypt_headroom = IEEE80211_ENCRYPT_HEADROOM; 414 415 ieee80211_set_default_queues(sdata); 416 417 ret = drv_add_interface(local, sdata); 418 if (WARN_ON(ret)) { 419 /* ok .. stupid driver, it asked for this! */ 420 kfree(sdata); 421 return ret; 422 } 423 424 ret = ieee80211_check_queues(sdata, NL80211_IFTYPE_MONITOR); 425 if (ret) { 426 kfree(sdata); 427 return ret; 428 } 429 430 mutex_lock(&local->iflist_mtx); 431 rcu_assign_pointer(local->monitor_sdata, sdata); 432 mutex_unlock(&local->iflist_mtx); 433 434 mutex_lock(&local->mtx); 435 ret = ieee80211_vif_use_channel(sdata, &local->monitor_chandef, 436 IEEE80211_CHANCTX_EXCLUSIVE); 437 mutex_unlock(&local->mtx); 438 if (ret) { 439 mutex_lock(&local->iflist_mtx); 440 RCU_INIT_POINTER(local->monitor_sdata, NULL); 441 mutex_unlock(&local->iflist_mtx); 442 synchronize_net(); 443 drv_remove_interface(local, sdata); 444 kfree(sdata); 445 return ret; 446 } 447 448 skb_queue_head_init(&sdata->skb_queue); 449 INIT_WORK(&sdata->work, ieee80211_iface_work); 450 451 return 0; 452 } 453 454 void ieee80211_del_virtual_monitor(struct ieee80211_local *local) 455 { 456 struct ieee80211_sub_if_data *sdata; 457 458 if (!ieee80211_hw_check(&local->hw, WANT_MONITOR_VIF)) 459 return; 460 461 ASSERT_RTNL(); 462 463 mutex_lock(&local->iflist_mtx); 464 465 sdata = rcu_dereference_protected(local->monitor_sdata, 466 lockdep_is_held(&local->iflist_mtx)); 467 if (!sdata) { 468 mutex_unlock(&local->iflist_mtx); 469 return; 470 } 471 472 RCU_INIT_POINTER(local->monitor_sdata, NULL); 473 mutex_unlock(&local->iflist_mtx); 474 475 synchronize_net(); 476 477 mutex_lock(&local->mtx); 478 ieee80211_vif_release_channel(sdata); 479 mutex_unlock(&local->mtx); 480 481 drv_remove_interface(local, sdata); 482 483 kfree(sdata); 484 } 485 486 /* 487 * NOTE: Be very careful when changing this function, it must NOT return 488 * an error on interface type changes that have been pre-checked, so most 489 * checks should be in ieee80211_check_concurrent_iface. 490 */ 491 int ieee80211_do_open(struct wireless_dev *wdev, bool coming_up) 492 { 493 struct ieee80211_sub_if_data *sdata = IEEE80211_WDEV_TO_SUB_IF(wdev); 494 struct net_device *dev = wdev->netdev; 495 struct ieee80211_local *local = sdata->local; 496 struct sta_info *sta; 497 u32 changed = 0; 498 int res; 499 u32 hw_reconf_flags = 0; 500 501 switch (sdata->vif.type) { 502 case NL80211_IFTYPE_WDS: 503 if (!is_valid_ether_addr(sdata->u.wds.remote_addr)) 504 return -ENOLINK; 505 break; 506 case NL80211_IFTYPE_AP_VLAN: { 507 struct ieee80211_sub_if_data *master; 508 509 if (!sdata->bss) 510 return -ENOLINK; 511 512 mutex_lock(&local->mtx); 513 list_add(&sdata->u.vlan.list, &sdata->bss->vlans); 514 mutex_unlock(&local->mtx); 515 516 master = container_of(sdata->bss, 517 struct ieee80211_sub_if_data, u.ap); 518 sdata->control_port_protocol = 519 master->control_port_protocol; 520 sdata->control_port_no_encrypt = 521 master->control_port_no_encrypt; 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 /* 1017 * If the interface goes down while suspended, presumably because 1018 * the device was unplugged and that happens before our resume, 1019 * then the driver is already unconfigured and the remainder of 1020 * this function isn't needed. 1021 * XXX: what about WoWLAN? If the device has software state, e.g. 1022 * memory allocated, it might expect teardown commands from 1023 * mac80211 here? 1024 */ 1025 if (local->suspended) { 1026 WARN_ON(local->wowlan); 1027 WARN_ON(rtnl_dereference(local->monitor_sdata)); 1028 return; 1029 } 1030 1031 switch (sdata->vif.type) { 1032 case NL80211_IFTYPE_AP_VLAN: 1033 break; 1034 case NL80211_IFTYPE_MONITOR: 1035 if (local->monitors == 0) 1036 ieee80211_del_virtual_monitor(local); 1037 1038 mutex_lock(&local->mtx); 1039 ieee80211_recalc_idle(local); 1040 mutex_unlock(&local->mtx); 1041 1042 if (!(sdata->u.mntr.flags & MONITOR_FLAG_ACTIVE)) 1043 break; 1044 1045 /* fall through */ 1046 default: 1047 if (going_down) 1048 drv_remove_interface(local, sdata); 1049 } 1050 1051 ieee80211_recalc_ps(local); 1052 1053 if (cancel_scan) 1054 flush_delayed_work(&local->scan_work); 1055 1056 if (local->open_count == 0) { 1057 ieee80211_stop_device(local); 1058 1059 /* no reconfiguring after stop! */ 1060 return; 1061 } 1062 1063 /* do after stop to avoid reconfiguring when we stop anyway */ 1064 ieee80211_configure_filter(local); 1065 ieee80211_hw_config(local, hw_reconf_flags); 1066 1067 if (local->monitors == local->open_count) 1068 ieee80211_add_virtual_monitor(local); 1069 } 1070 1071 static int ieee80211_stop(struct net_device *dev) 1072 { 1073 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); 1074 1075 ieee80211_do_stop(sdata, true); 1076 1077 return 0; 1078 } 1079 1080 static void ieee80211_set_multicast_list(struct net_device *dev) 1081 { 1082 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); 1083 struct ieee80211_local *local = sdata->local; 1084 int allmulti, sdata_allmulti; 1085 1086 allmulti = !!(dev->flags & IFF_ALLMULTI); 1087 sdata_allmulti = !!(sdata->flags & IEEE80211_SDATA_ALLMULTI); 1088 1089 if (allmulti != sdata_allmulti) { 1090 if (dev->flags & IFF_ALLMULTI) 1091 atomic_inc(&local->iff_allmultis); 1092 else 1093 atomic_dec(&local->iff_allmultis); 1094 sdata->flags ^= IEEE80211_SDATA_ALLMULTI; 1095 } 1096 1097 spin_lock_bh(&local->filter_lock); 1098 __hw_addr_sync(&local->mc_list, &dev->mc, dev->addr_len); 1099 spin_unlock_bh(&local->filter_lock); 1100 ieee80211_queue_work(&local->hw, &local->reconfig_filter); 1101 } 1102 1103 /* 1104 * Called when the netdev is removed or, by the code below, before 1105 * the interface type changes. 1106 */ 1107 static void ieee80211_teardown_sdata(struct ieee80211_sub_if_data *sdata) 1108 { 1109 int i; 1110 1111 /* free extra data */ 1112 ieee80211_free_keys(sdata, false); 1113 1114 ieee80211_debugfs_remove_netdev(sdata); 1115 1116 for (i = 0; i < IEEE80211_FRAGMENT_MAX; i++) 1117 __skb_queue_purge(&sdata->fragments[i].skb_list); 1118 sdata->fragment_next = 0; 1119 1120 if (ieee80211_vif_is_mesh(&sdata->vif)) 1121 ieee80211_mesh_teardown_sdata(sdata); 1122 } 1123 1124 static void ieee80211_uninit(struct net_device *dev) 1125 { 1126 ieee80211_teardown_sdata(IEEE80211_DEV_TO_SUB_IF(dev)); 1127 } 1128 1129 static u16 ieee80211_netdev_select_queue(struct net_device *dev, 1130 struct sk_buff *skb, 1131 void *accel_priv, 1132 select_queue_fallback_t fallback) 1133 { 1134 return ieee80211_select_queue(IEEE80211_DEV_TO_SUB_IF(dev), skb); 1135 } 1136 1137 static void 1138 ieee80211_get_stats64(struct net_device *dev, struct rtnl_link_stats64 *stats) 1139 { 1140 int i; 1141 1142 for_each_possible_cpu(i) { 1143 const struct pcpu_sw_netstats *tstats; 1144 u64 rx_packets, rx_bytes, tx_packets, tx_bytes; 1145 unsigned int start; 1146 1147 tstats = per_cpu_ptr(dev->tstats, i); 1148 1149 do { 1150 start = u64_stats_fetch_begin_irq(&tstats->syncp); 1151 rx_packets = tstats->rx_packets; 1152 tx_packets = tstats->tx_packets; 1153 rx_bytes = tstats->rx_bytes; 1154 tx_bytes = tstats->tx_bytes; 1155 } while (u64_stats_fetch_retry_irq(&tstats->syncp, start)); 1156 1157 stats->rx_packets += rx_packets; 1158 stats->tx_packets += tx_packets; 1159 stats->rx_bytes += rx_bytes; 1160 stats->tx_bytes += tx_bytes; 1161 } 1162 } 1163 1164 static const struct net_device_ops ieee80211_dataif_ops = { 1165 .ndo_open = ieee80211_open, 1166 .ndo_stop = ieee80211_stop, 1167 .ndo_uninit = ieee80211_uninit, 1168 .ndo_start_xmit = ieee80211_subif_start_xmit, 1169 .ndo_set_rx_mode = ieee80211_set_multicast_list, 1170 .ndo_set_mac_address = ieee80211_change_mac, 1171 .ndo_select_queue = ieee80211_netdev_select_queue, 1172 .ndo_get_stats64 = ieee80211_get_stats64, 1173 }; 1174 1175 static u16 ieee80211_monitor_select_queue(struct net_device *dev, 1176 struct sk_buff *skb, 1177 void *accel_priv, 1178 select_queue_fallback_t fallback) 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_qos_ctl(hdr) & 1328 IEEE80211_QOS_CTL_TID_MASK; 1329 1330 __ieee80211_stop_rx_ba_session( 1331 sta, tid, WLAN_BACK_RECIPIENT, 1332 WLAN_REASON_QSTA_REQUIRE_SETUP, 1333 true); 1334 } 1335 mutex_unlock(&local->sta_mtx); 1336 } else switch (sdata->vif.type) { 1337 case NL80211_IFTYPE_STATION: 1338 ieee80211_sta_rx_queued_mgmt(sdata, skb); 1339 break; 1340 case NL80211_IFTYPE_ADHOC: 1341 ieee80211_ibss_rx_queued_mgmt(sdata, skb); 1342 break; 1343 case NL80211_IFTYPE_MESH_POINT: 1344 if (!ieee80211_vif_is_mesh(&sdata->vif)) 1345 break; 1346 ieee80211_mesh_rx_queued_mgmt(sdata, skb); 1347 break; 1348 default: 1349 WARN(1, "frame for unexpected interface type"); 1350 break; 1351 } 1352 1353 kfree_skb(skb); 1354 } 1355 1356 /* then other type-dependent work */ 1357 switch (sdata->vif.type) { 1358 case NL80211_IFTYPE_STATION: 1359 ieee80211_sta_work(sdata); 1360 break; 1361 case NL80211_IFTYPE_ADHOC: 1362 ieee80211_ibss_work(sdata); 1363 break; 1364 case NL80211_IFTYPE_MESH_POINT: 1365 if (!ieee80211_vif_is_mesh(&sdata->vif)) 1366 break; 1367 ieee80211_mesh_work(sdata); 1368 break; 1369 case NL80211_IFTYPE_OCB: 1370 ieee80211_ocb_work(sdata); 1371 break; 1372 default: 1373 break; 1374 } 1375 } 1376 1377 static void ieee80211_recalc_smps_work(struct work_struct *work) 1378 { 1379 struct ieee80211_sub_if_data *sdata = 1380 container_of(work, struct ieee80211_sub_if_data, recalc_smps); 1381 1382 ieee80211_recalc_smps(sdata); 1383 } 1384 1385 /* 1386 * Helper function to initialise an interface to a specific type. 1387 */ 1388 static void ieee80211_setup_sdata(struct ieee80211_sub_if_data *sdata, 1389 enum nl80211_iftype type) 1390 { 1391 static const u8 bssid_wildcard[ETH_ALEN] = {0xff, 0xff, 0xff, 1392 0xff, 0xff, 0xff}; 1393 1394 /* clear type-dependent union */ 1395 memset(&sdata->u, 0, sizeof(sdata->u)); 1396 1397 /* and set some type-dependent values */ 1398 sdata->vif.type = type; 1399 sdata->vif.p2p = false; 1400 sdata->wdev.iftype = type; 1401 1402 sdata->control_port_protocol = cpu_to_be16(ETH_P_PAE); 1403 sdata->control_port_no_encrypt = false; 1404 sdata->encrypt_headroom = IEEE80211_ENCRYPT_HEADROOM; 1405 sdata->vif.bss_conf.idle = true; 1406 1407 sdata->noack_map = 0; 1408 1409 /* only monitor/p2p-device differ */ 1410 if (sdata->dev) { 1411 sdata->dev->netdev_ops = &ieee80211_dataif_ops; 1412 sdata->dev->type = ARPHRD_ETHER; 1413 } 1414 1415 skb_queue_head_init(&sdata->skb_queue); 1416 INIT_WORK(&sdata->work, ieee80211_iface_work); 1417 INIT_WORK(&sdata->recalc_smps, ieee80211_recalc_smps_work); 1418 INIT_WORK(&sdata->csa_finalize_work, ieee80211_csa_finalize_work); 1419 INIT_LIST_HEAD(&sdata->assigned_chanctx_list); 1420 INIT_LIST_HEAD(&sdata->reserved_chanctx_list); 1421 1422 switch (type) { 1423 case NL80211_IFTYPE_P2P_GO: 1424 type = NL80211_IFTYPE_AP; 1425 sdata->vif.type = type; 1426 sdata->vif.p2p = true; 1427 /* fall through */ 1428 case NL80211_IFTYPE_AP: 1429 skb_queue_head_init(&sdata->u.ap.ps.bc_buf); 1430 INIT_LIST_HEAD(&sdata->u.ap.vlans); 1431 INIT_WORK(&sdata->u.ap.request_smps_work, 1432 ieee80211_request_smps_ap_work); 1433 sdata->vif.bss_conf.bssid = sdata->vif.addr; 1434 sdata->u.ap.req_smps = IEEE80211_SMPS_OFF; 1435 break; 1436 case NL80211_IFTYPE_P2P_CLIENT: 1437 type = NL80211_IFTYPE_STATION; 1438 sdata->vif.type = type; 1439 sdata->vif.p2p = true; 1440 /* fall through */ 1441 case NL80211_IFTYPE_STATION: 1442 sdata->vif.bss_conf.bssid = sdata->u.mgd.bssid; 1443 ieee80211_sta_setup_sdata(sdata); 1444 break; 1445 case NL80211_IFTYPE_OCB: 1446 sdata->vif.bss_conf.bssid = bssid_wildcard; 1447 ieee80211_ocb_setup_sdata(sdata); 1448 break; 1449 case NL80211_IFTYPE_ADHOC: 1450 sdata->vif.bss_conf.bssid = sdata->u.ibss.bssid; 1451 ieee80211_ibss_setup_sdata(sdata); 1452 break; 1453 case NL80211_IFTYPE_MESH_POINT: 1454 if (ieee80211_vif_is_mesh(&sdata->vif)) 1455 ieee80211_mesh_init_sdata(sdata); 1456 break; 1457 case NL80211_IFTYPE_MONITOR: 1458 sdata->dev->type = ARPHRD_IEEE80211_RADIOTAP; 1459 sdata->dev->netdev_ops = &ieee80211_monitorif_ops; 1460 sdata->u.mntr.flags = MONITOR_FLAG_CONTROL | 1461 MONITOR_FLAG_OTHER_BSS; 1462 break; 1463 case NL80211_IFTYPE_WDS: 1464 sdata->vif.bss_conf.bssid = NULL; 1465 break; 1466 case NL80211_IFTYPE_NAN: 1467 idr_init(&sdata->u.nan.function_inst_ids); 1468 spin_lock_init(&sdata->u.nan.func_lock); 1469 sdata->vif.bss_conf.bssid = sdata->vif.addr; 1470 break; 1471 case NL80211_IFTYPE_AP_VLAN: 1472 case NL80211_IFTYPE_P2P_DEVICE: 1473 sdata->vif.bss_conf.bssid = sdata->vif.addr; 1474 break; 1475 case NL80211_IFTYPE_UNSPECIFIED: 1476 case NUM_NL80211_IFTYPES: 1477 BUG(); 1478 break; 1479 } 1480 1481 ieee80211_debugfs_add_netdev(sdata); 1482 } 1483 1484 static int ieee80211_runtime_change_iftype(struct ieee80211_sub_if_data *sdata, 1485 enum nl80211_iftype type) 1486 { 1487 struct ieee80211_local *local = sdata->local; 1488 int ret, err; 1489 enum nl80211_iftype internal_type = type; 1490 bool p2p = false; 1491 1492 ASSERT_RTNL(); 1493 1494 if (!local->ops->change_interface) 1495 return -EBUSY; 1496 1497 switch (sdata->vif.type) { 1498 case NL80211_IFTYPE_AP: 1499 case NL80211_IFTYPE_STATION: 1500 case NL80211_IFTYPE_ADHOC: 1501 case NL80211_IFTYPE_OCB: 1502 /* 1503 * Could maybe also all others here? 1504 * Just not sure how that interacts 1505 * with the RX/config path e.g. for 1506 * mesh. 1507 */ 1508 break; 1509 default: 1510 return -EBUSY; 1511 } 1512 1513 switch (type) { 1514 case NL80211_IFTYPE_AP: 1515 case NL80211_IFTYPE_STATION: 1516 case NL80211_IFTYPE_ADHOC: 1517 case NL80211_IFTYPE_OCB: 1518 /* 1519 * Could probably support everything 1520 * but WDS here (WDS do_open can fail 1521 * under memory pressure, which this 1522 * code isn't prepared to handle). 1523 */ 1524 break; 1525 case NL80211_IFTYPE_P2P_CLIENT: 1526 p2p = true; 1527 internal_type = NL80211_IFTYPE_STATION; 1528 break; 1529 case NL80211_IFTYPE_P2P_GO: 1530 p2p = true; 1531 internal_type = NL80211_IFTYPE_AP; 1532 break; 1533 default: 1534 return -EBUSY; 1535 } 1536 1537 ret = ieee80211_check_concurrent_iface(sdata, internal_type); 1538 if (ret) 1539 return ret; 1540 1541 ieee80211_do_stop(sdata, false); 1542 1543 ieee80211_teardown_sdata(sdata); 1544 1545 ret = drv_change_interface(local, sdata, internal_type, p2p); 1546 if (ret) 1547 type = ieee80211_vif_type_p2p(&sdata->vif); 1548 1549 /* 1550 * Ignore return value here, there's not much we can do since 1551 * the driver changed the interface type internally already. 1552 * The warnings will hopefully make driver authors fix it :-) 1553 */ 1554 ieee80211_check_queues(sdata, type); 1555 1556 ieee80211_setup_sdata(sdata, type); 1557 1558 err = ieee80211_do_open(&sdata->wdev, false); 1559 WARN(err, "type change: do_open returned %d", err); 1560 1561 return ret; 1562 } 1563 1564 int ieee80211_if_change_type(struct ieee80211_sub_if_data *sdata, 1565 enum nl80211_iftype type) 1566 { 1567 int ret; 1568 1569 ASSERT_RTNL(); 1570 1571 if (type == ieee80211_vif_type_p2p(&sdata->vif)) 1572 return 0; 1573 1574 if (ieee80211_sdata_running(sdata)) { 1575 ret = ieee80211_runtime_change_iftype(sdata, type); 1576 if (ret) 1577 return ret; 1578 } else { 1579 /* Purge and reset type-dependent state. */ 1580 ieee80211_teardown_sdata(sdata); 1581 ieee80211_setup_sdata(sdata, type); 1582 } 1583 1584 /* reset some values that shouldn't be kept across type changes */ 1585 if (type == NL80211_IFTYPE_STATION) 1586 sdata->u.mgd.use_4addr = false; 1587 1588 return 0; 1589 } 1590 1591 static void ieee80211_assign_perm_addr(struct ieee80211_local *local, 1592 u8 *perm_addr, enum nl80211_iftype type) 1593 { 1594 struct ieee80211_sub_if_data *sdata; 1595 u64 mask, start, addr, val, inc; 1596 u8 *m; 1597 u8 tmp_addr[ETH_ALEN]; 1598 int i; 1599 1600 /* default ... something at least */ 1601 memcpy(perm_addr, local->hw.wiphy->perm_addr, ETH_ALEN); 1602 1603 if (is_zero_ether_addr(local->hw.wiphy->addr_mask) && 1604 local->hw.wiphy->n_addresses <= 1) 1605 return; 1606 1607 mutex_lock(&local->iflist_mtx); 1608 1609 switch (type) { 1610 case NL80211_IFTYPE_MONITOR: 1611 /* doesn't matter */ 1612 break; 1613 case NL80211_IFTYPE_WDS: 1614 case NL80211_IFTYPE_AP_VLAN: 1615 /* match up with an AP interface */ 1616 list_for_each_entry(sdata, &local->interfaces, list) { 1617 if (sdata->vif.type != NL80211_IFTYPE_AP) 1618 continue; 1619 memcpy(perm_addr, sdata->vif.addr, ETH_ALEN); 1620 break; 1621 } 1622 /* keep default if no AP interface present */ 1623 break; 1624 case NL80211_IFTYPE_P2P_CLIENT: 1625 case NL80211_IFTYPE_P2P_GO: 1626 if (ieee80211_hw_check(&local->hw, P2P_DEV_ADDR_FOR_INTF)) { 1627 list_for_each_entry(sdata, &local->interfaces, list) { 1628 if (sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE) 1629 continue; 1630 if (!ieee80211_sdata_running(sdata)) 1631 continue; 1632 memcpy(perm_addr, sdata->vif.addr, ETH_ALEN); 1633 goto out_unlock; 1634 } 1635 } 1636 /* otherwise fall through */ 1637 default: 1638 /* assign a new address if possible -- try n_addresses first */ 1639 for (i = 0; i < local->hw.wiphy->n_addresses; i++) { 1640 bool used = false; 1641 1642 list_for_each_entry(sdata, &local->interfaces, list) { 1643 if (ether_addr_equal(local->hw.wiphy->addresses[i].addr, 1644 sdata->vif.addr)) { 1645 used = true; 1646 break; 1647 } 1648 } 1649 1650 if (!used) { 1651 memcpy(perm_addr, 1652 local->hw.wiphy->addresses[i].addr, 1653 ETH_ALEN); 1654 break; 1655 } 1656 } 1657 1658 /* try mask if available */ 1659 if (is_zero_ether_addr(local->hw.wiphy->addr_mask)) 1660 break; 1661 1662 m = local->hw.wiphy->addr_mask; 1663 mask = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) | 1664 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) | 1665 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8); 1666 1667 if (__ffs64(mask) + hweight64(mask) != fls64(mask)) { 1668 /* not a contiguous mask ... not handled now! */ 1669 pr_info("not contiguous\n"); 1670 break; 1671 } 1672 1673 /* 1674 * Pick address of existing interface in case user changed 1675 * MAC address manually, default to perm_addr. 1676 */ 1677 m = local->hw.wiphy->perm_addr; 1678 list_for_each_entry(sdata, &local->interfaces, list) { 1679 if (sdata->vif.type == NL80211_IFTYPE_MONITOR) 1680 continue; 1681 m = sdata->vif.addr; 1682 break; 1683 } 1684 start = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) | 1685 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) | 1686 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8); 1687 1688 inc = 1ULL<<__ffs64(mask); 1689 val = (start & mask); 1690 addr = (start & ~mask) | (val & mask); 1691 do { 1692 bool used = false; 1693 1694 tmp_addr[5] = addr >> 0*8; 1695 tmp_addr[4] = addr >> 1*8; 1696 tmp_addr[3] = addr >> 2*8; 1697 tmp_addr[2] = addr >> 3*8; 1698 tmp_addr[1] = addr >> 4*8; 1699 tmp_addr[0] = addr >> 5*8; 1700 1701 val += inc; 1702 1703 list_for_each_entry(sdata, &local->interfaces, list) { 1704 if (ether_addr_equal(tmp_addr, sdata->vif.addr)) { 1705 used = true; 1706 break; 1707 } 1708 } 1709 1710 if (!used) { 1711 memcpy(perm_addr, tmp_addr, ETH_ALEN); 1712 break; 1713 } 1714 addr = (start & ~mask) | (val & mask); 1715 } while (addr != start); 1716 1717 break; 1718 } 1719 1720 out_unlock: 1721 mutex_unlock(&local->iflist_mtx); 1722 } 1723 1724 int ieee80211_if_add(struct ieee80211_local *local, const char *name, 1725 unsigned char name_assign_type, 1726 struct wireless_dev **new_wdev, enum nl80211_iftype type, 1727 struct vif_params *params) 1728 { 1729 struct net_device *ndev = NULL; 1730 struct ieee80211_sub_if_data *sdata = NULL; 1731 struct txq_info *txqi; 1732 void (*if_setup)(struct net_device *dev); 1733 int ret, i; 1734 int txqs = 1; 1735 1736 ASSERT_RTNL(); 1737 1738 if (type == NL80211_IFTYPE_P2P_DEVICE || type == NL80211_IFTYPE_NAN) { 1739 struct wireless_dev *wdev; 1740 1741 sdata = kzalloc(sizeof(*sdata) + local->hw.vif_data_size, 1742 GFP_KERNEL); 1743 if (!sdata) 1744 return -ENOMEM; 1745 wdev = &sdata->wdev; 1746 1747 sdata->dev = NULL; 1748 strlcpy(sdata->name, name, IFNAMSIZ); 1749 ieee80211_assign_perm_addr(local, wdev->address, type); 1750 memcpy(sdata->vif.addr, wdev->address, ETH_ALEN); 1751 } else { 1752 int size = ALIGN(sizeof(*sdata) + local->hw.vif_data_size, 1753 sizeof(void *)); 1754 int txq_size = 0; 1755 1756 if (local->ops->wake_tx_queue && 1757 type != NL80211_IFTYPE_AP_VLAN && 1758 type != NL80211_IFTYPE_MONITOR) 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 1767 if (local->hw.queues >= IEEE80211_NUM_ACS) 1768 txqs = IEEE80211_NUM_ACS; 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 (params && 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 if (params) { 1870 ndev->ieee80211_ptr->use_4addr = params->use_4addr; 1871 if (type == NL80211_IFTYPE_STATION) 1872 sdata->u.mgd.use_4addr = params->use_4addr; 1873 } 1874 1875 ndev->features |= local->hw.netdev_features; 1876 1877 netdev_set_default_ethtool_ops(ndev, &ieee80211_ethtool_ops); 1878 1879 /* MTU range: 256 - 2304 */ 1880 ndev->min_mtu = 256; 1881 ndev->max_mtu = IEEE80211_MAX_DATA_LEN; 1882 1883 ret = register_netdevice(ndev); 1884 if (ret) { 1885 free_netdev(ndev); 1886 return ret; 1887 } 1888 } 1889 1890 mutex_lock(&local->iflist_mtx); 1891 list_add_tail_rcu(&sdata->list, &local->interfaces); 1892 mutex_unlock(&local->iflist_mtx); 1893 1894 if (new_wdev) 1895 *new_wdev = &sdata->wdev; 1896 1897 return 0; 1898 } 1899 1900 void ieee80211_if_remove(struct ieee80211_sub_if_data *sdata) 1901 { 1902 ASSERT_RTNL(); 1903 1904 mutex_lock(&sdata->local->iflist_mtx); 1905 list_del_rcu(&sdata->list); 1906 mutex_unlock(&sdata->local->iflist_mtx); 1907 1908 synchronize_rcu(); 1909 1910 if (sdata->dev) { 1911 unregister_netdevice(sdata->dev); 1912 } else { 1913 cfg80211_unregister_wdev(&sdata->wdev); 1914 ieee80211_teardown_sdata(sdata); 1915 kfree(sdata); 1916 } 1917 } 1918 1919 void ieee80211_sdata_stop(struct ieee80211_sub_if_data *sdata) 1920 { 1921 if (WARN_ON_ONCE(!test_bit(SDATA_STATE_RUNNING, &sdata->state))) 1922 return; 1923 ieee80211_do_stop(sdata, true); 1924 } 1925 1926 void ieee80211_remove_interfaces(struct ieee80211_local *local) 1927 { 1928 struct ieee80211_sub_if_data *sdata, *tmp; 1929 LIST_HEAD(unreg_list); 1930 LIST_HEAD(wdev_list); 1931 1932 ASSERT_RTNL(); 1933 1934 /* Before destroying the interfaces, make sure they're all stopped so 1935 * that the hardware is stopped. Otherwise, the driver might still be 1936 * iterating the interfaces during the shutdown, e.g. from a worker 1937 * or from RX processing or similar, and if it does so (using atomic 1938 * iteration) while we're manipulating the list, the iteration will 1939 * crash. 1940 * 1941 * After this, the hardware should be stopped and the driver should 1942 * have stopped all of its activities, so that we can do RCU-unaware 1943 * manipulations of the interface list below. 1944 */ 1945 cfg80211_shutdown_all_interfaces(local->hw.wiphy); 1946 1947 WARN(local->open_count, "%s: open count remains %d\n", 1948 wiphy_name(local->hw.wiphy), local->open_count); 1949 1950 mutex_lock(&local->iflist_mtx); 1951 list_for_each_entry_safe(sdata, tmp, &local->interfaces, list) { 1952 list_del(&sdata->list); 1953 1954 if (sdata->dev) 1955 unregister_netdevice_queue(sdata->dev, &unreg_list); 1956 else 1957 list_add(&sdata->list, &wdev_list); 1958 } 1959 mutex_unlock(&local->iflist_mtx); 1960 unregister_netdevice_many(&unreg_list); 1961 1962 list_for_each_entry_safe(sdata, tmp, &wdev_list, list) { 1963 list_del(&sdata->list); 1964 cfg80211_unregister_wdev(&sdata->wdev); 1965 kfree(sdata); 1966 } 1967 } 1968 1969 static int netdev_notify(struct notifier_block *nb, 1970 unsigned long state, void *ptr) 1971 { 1972 struct net_device *dev = netdev_notifier_info_to_dev(ptr); 1973 struct ieee80211_sub_if_data *sdata; 1974 1975 if (state != NETDEV_CHANGENAME) 1976 return NOTIFY_DONE; 1977 1978 if (!dev->ieee80211_ptr || !dev->ieee80211_ptr->wiphy) 1979 return NOTIFY_DONE; 1980 1981 if (dev->ieee80211_ptr->wiphy->privid != mac80211_wiphy_privid) 1982 return NOTIFY_DONE; 1983 1984 sdata = IEEE80211_DEV_TO_SUB_IF(dev); 1985 memcpy(sdata->name, dev->name, IFNAMSIZ); 1986 ieee80211_debugfs_rename_netdev(sdata); 1987 1988 return NOTIFY_OK; 1989 } 1990 1991 static struct notifier_block mac80211_netdev_notifier = { 1992 .notifier_call = netdev_notify, 1993 }; 1994 1995 int ieee80211_iface_init(void) 1996 { 1997 return register_netdevice_notifier(&mac80211_netdev_notifier); 1998 } 1999 2000 void ieee80211_iface_exit(void) 2001 { 2002 unregister_netdevice_notifier(&mac80211_netdev_notifier); 2003 } 2004 2005 void ieee80211_vif_inc_num_mcast(struct ieee80211_sub_if_data *sdata) 2006 { 2007 if (sdata->vif.type == NL80211_IFTYPE_AP) 2008 atomic_inc(&sdata->u.ap.num_mcast_sta); 2009 else if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) 2010 atomic_inc(&sdata->u.vlan.num_mcast_sta); 2011 } 2012 2013 void ieee80211_vif_dec_num_mcast(struct ieee80211_sub_if_data *sdata) 2014 { 2015 if (sdata->vif.type == NL80211_IFTYPE_AP) 2016 atomic_dec(&sdata->u.ap.num_mcast_sta); 2017 else if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) 2018 atomic_dec(&sdata->u.vlan.num_mcast_sta); 2019 } 2020