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 netif_tx_start_all_queues(dev); 735 } else if (dev) { 736 unsigned long flags; 737 int n_acs = IEEE80211_NUM_ACS; 738 int ac; 739 740 if (local->hw.queues < IEEE80211_NUM_ACS) 741 n_acs = 1; 742 743 spin_lock_irqsave(&local->queue_stop_reason_lock, flags); 744 if (sdata->vif.cab_queue == IEEE80211_INVAL_HW_QUEUE || 745 (local->queue_stop_reasons[sdata->vif.cab_queue] == 0 && 746 skb_queue_empty(&local->pending[sdata->vif.cab_queue]))) { 747 for (ac = 0; ac < n_acs; ac++) { 748 int ac_queue = sdata->vif.hw_queue[ac]; 749 750 if (local->queue_stop_reasons[ac_queue] == 0 && 751 skb_queue_empty(&local->pending[ac_queue])) 752 netif_start_subqueue(dev, ac); 753 } 754 } 755 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); 756 } 757 758 return 0; 759 err_del_interface: 760 drv_remove_interface(local, sdata); 761 err_stop: 762 if (!local->open_count) 763 drv_stop(local); 764 err_del_bss: 765 sdata->bss = NULL; 766 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) { 767 mutex_lock(&local->mtx); 768 list_del(&sdata->u.vlan.list); 769 mutex_unlock(&local->mtx); 770 } 771 /* might already be clear but that doesn't matter */ 772 clear_bit(SDATA_STATE_RUNNING, &sdata->state); 773 return res; 774 } 775 776 static int ieee80211_open(struct net_device *dev) 777 { 778 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); 779 int err; 780 781 /* fail early if user set an invalid address */ 782 if (!is_valid_ether_addr(dev->dev_addr)) 783 return -EADDRNOTAVAIL; 784 785 err = ieee80211_check_concurrent_iface(sdata, sdata->vif.type); 786 if (err) 787 return err; 788 789 return ieee80211_do_open(&sdata->wdev, true); 790 } 791 792 static void ieee80211_do_stop(struct ieee80211_sub_if_data *sdata, 793 bool going_down) 794 { 795 struct ieee80211_local *local = sdata->local; 796 struct fq *fq = &local->fq; 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 sdata->bss = NULL; 997 998 spin_lock_irqsave(&local->queue_stop_reason_lock, flags); 999 for (i = 0; i < IEEE80211_MAX_QUEUES; i++) { 1000 skb_queue_walk_safe(&local->pending[i], skb, tmp) { 1001 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); 1002 if (info->control.vif == &sdata->vif) { 1003 __skb_unlink(skb, &local->pending[i]); 1004 ieee80211_free_txskb(&local->hw, skb); 1005 } 1006 } 1007 } 1008 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); 1009 1010 if (sdata->vif.txq) { 1011 struct txq_info *txqi = to_txq_info(sdata->vif.txq); 1012 1013 spin_lock_bh(&fq->lock); 1014 ieee80211_txq_purge(local, txqi); 1015 spin_unlock_bh(&fq->lock); 1016 } 1017 1018 if (local->open_count == 0) 1019 ieee80211_clear_tx_pending(local); 1020 1021 /* 1022 * If the interface goes down while suspended, presumably because 1023 * the device was unplugged and that happens before our resume, 1024 * then the driver is already unconfigured and the remainder of 1025 * this function isn't needed. 1026 * XXX: what about WoWLAN? If the device has software state, e.g. 1027 * memory allocated, it might expect teardown commands from 1028 * mac80211 here? 1029 */ 1030 if (local->suspended) { 1031 WARN_ON(local->wowlan); 1032 WARN_ON(rtnl_dereference(local->monitor_sdata)); 1033 return; 1034 } 1035 1036 switch (sdata->vif.type) { 1037 case NL80211_IFTYPE_AP_VLAN: 1038 break; 1039 case NL80211_IFTYPE_MONITOR: 1040 if (local->monitors == 0) 1041 ieee80211_del_virtual_monitor(local); 1042 1043 mutex_lock(&local->mtx); 1044 ieee80211_recalc_idle(local); 1045 mutex_unlock(&local->mtx); 1046 1047 if (!(sdata->u.mntr.flags & MONITOR_FLAG_ACTIVE)) 1048 break; 1049 1050 /* fall through */ 1051 default: 1052 if (going_down) 1053 drv_remove_interface(local, sdata); 1054 } 1055 1056 ieee80211_recalc_ps(local); 1057 1058 if (cancel_scan) 1059 flush_delayed_work(&local->scan_work); 1060 1061 if (local->open_count == 0) { 1062 ieee80211_stop_device(local); 1063 1064 /* no reconfiguring after stop! */ 1065 return; 1066 } 1067 1068 /* do after stop to avoid reconfiguring when we stop anyway */ 1069 ieee80211_configure_filter(local); 1070 ieee80211_hw_config(local, hw_reconf_flags); 1071 1072 if (local->monitors == local->open_count) 1073 ieee80211_add_virtual_monitor(local); 1074 } 1075 1076 static int ieee80211_stop(struct net_device *dev) 1077 { 1078 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); 1079 1080 ieee80211_do_stop(sdata, true); 1081 1082 return 0; 1083 } 1084 1085 static void ieee80211_set_multicast_list(struct net_device *dev) 1086 { 1087 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); 1088 struct ieee80211_local *local = sdata->local; 1089 int allmulti, sdata_allmulti; 1090 1091 allmulti = !!(dev->flags & IFF_ALLMULTI); 1092 sdata_allmulti = !!(sdata->flags & IEEE80211_SDATA_ALLMULTI); 1093 1094 if (allmulti != sdata_allmulti) { 1095 if (dev->flags & IFF_ALLMULTI) 1096 atomic_inc(&local->iff_allmultis); 1097 else 1098 atomic_dec(&local->iff_allmultis); 1099 sdata->flags ^= IEEE80211_SDATA_ALLMULTI; 1100 } 1101 1102 spin_lock_bh(&local->filter_lock); 1103 __hw_addr_sync(&local->mc_list, &dev->mc, dev->addr_len); 1104 spin_unlock_bh(&local->filter_lock); 1105 ieee80211_queue_work(&local->hw, &local->reconfig_filter); 1106 } 1107 1108 /* 1109 * Called when the netdev is removed or, by the code below, before 1110 * the interface type changes. 1111 */ 1112 static void ieee80211_teardown_sdata(struct ieee80211_sub_if_data *sdata) 1113 { 1114 int i; 1115 1116 /* free extra data */ 1117 ieee80211_free_keys(sdata, false); 1118 1119 ieee80211_debugfs_remove_netdev(sdata); 1120 1121 for (i = 0; i < IEEE80211_FRAGMENT_MAX; i++) 1122 __skb_queue_purge(&sdata->fragments[i].skb_list); 1123 sdata->fragment_next = 0; 1124 1125 if (ieee80211_vif_is_mesh(&sdata->vif)) 1126 ieee80211_mesh_teardown_sdata(sdata); 1127 } 1128 1129 static void ieee80211_uninit(struct net_device *dev) 1130 { 1131 ieee80211_teardown_sdata(IEEE80211_DEV_TO_SUB_IF(dev)); 1132 } 1133 1134 static u16 ieee80211_netdev_select_queue(struct net_device *dev, 1135 struct sk_buff *skb, 1136 void *accel_priv, 1137 select_queue_fallback_t fallback) 1138 { 1139 return ieee80211_select_queue(IEEE80211_DEV_TO_SUB_IF(dev), skb); 1140 } 1141 1142 static void 1143 ieee80211_get_stats64(struct net_device *dev, struct rtnl_link_stats64 *stats) 1144 { 1145 int i; 1146 1147 for_each_possible_cpu(i) { 1148 const struct pcpu_sw_netstats *tstats; 1149 u64 rx_packets, rx_bytes, tx_packets, tx_bytes; 1150 unsigned int start; 1151 1152 tstats = per_cpu_ptr(dev->tstats, i); 1153 1154 do { 1155 start = u64_stats_fetch_begin_irq(&tstats->syncp); 1156 rx_packets = tstats->rx_packets; 1157 tx_packets = tstats->tx_packets; 1158 rx_bytes = tstats->rx_bytes; 1159 tx_bytes = tstats->tx_bytes; 1160 } while (u64_stats_fetch_retry_irq(&tstats->syncp, start)); 1161 1162 stats->rx_packets += rx_packets; 1163 stats->tx_packets += tx_packets; 1164 stats->rx_bytes += rx_bytes; 1165 stats->tx_bytes += tx_bytes; 1166 } 1167 } 1168 1169 static const struct net_device_ops ieee80211_dataif_ops = { 1170 .ndo_open = ieee80211_open, 1171 .ndo_stop = ieee80211_stop, 1172 .ndo_uninit = ieee80211_uninit, 1173 .ndo_start_xmit = ieee80211_subif_start_xmit, 1174 .ndo_set_rx_mode = ieee80211_set_multicast_list, 1175 .ndo_set_mac_address = ieee80211_change_mac, 1176 .ndo_select_queue = ieee80211_netdev_select_queue, 1177 .ndo_get_stats64 = ieee80211_get_stats64, 1178 }; 1179 1180 static u16 ieee80211_monitor_select_queue(struct net_device *dev, 1181 struct sk_buff *skb, 1182 void *accel_priv, 1183 select_queue_fallback_t fallback) 1184 { 1185 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); 1186 struct ieee80211_local *local = sdata->local; 1187 struct ieee80211_hdr *hdr; 1188 struct ieee80211_radiotap_header *rtap = (void *)skb->data; 1189 1190 if (local->hw.queues < IEEE80211_NUM_ACS) 1191 return 0; 1192 1193 if (skb->len < 4 || 1194 skb->len < le16_to_cpu(rtap->it_len) + 2 /* frame control */) 1195 return 0; /* doesn't matter, frame will be dropped */ 1196 1197 hdr = (void *)((u8 *)skb->data + le16_to_cpu(rtap->it_len)); 1198 1199 return ieee80211_select_queue_80211(sdata, skb, hdr); 1200 } 1201 1202 static const struct net_device_ops ieee80211_monitorif_ops = { 1203 .ndo_open = ieee80211_open, 1204 .ndo_stop = ieee80211_stop, 1205 .ndo_uninit = ieee80211_uninit, 1206 .ndo_start_xmit = ieee80211_monitor_start_xmit, 1207 .ndo_set_rx_mode = ieee80211_set_multicast_list, 1208 .ndo_set_mac_address = ieee80211_change_mac, 1209 .ndo_select_queue = ieee80211_monitor_select_queue, 1210 .ndo_get_stats64 = ieee80211_get_stats64, 1211 }; 1212 1213 static void ieee80211_if_free(struct net_device *dev) 1214 { 1215 free_percpu(dev->tstats); 1216 } 1217 1218 static void ieee80211_if_setup(struct net_device *dev) 1219 { 1220 ether_setup(dev); 1221 dev->priv_flags &= ~IFF_TX_SKB_SHARING; 1222 dev->netdev_ops = &ieee80211_dataif_ops; 1223 dev->needs_free_netdev = true; 1224 dev->priv_destructor = ieee80211_if_free; 1225 } 1226 1227 static void ieee80211_if_setup_no_queue(struct net_device *dev) 1228 { 1229 ieee80211_if_setup(dev); 1230 dev->priv_flags |= IFF_NO_QUEUE; 1231 } 1232 1233 static void ieee80211_iface_work(struct work_struct *work) 1234 { 1235 struct ieee80211_sub_if_data *sdata = 1236 container_of(work, struct ieee80211_sub_if_data, work); 1237 struct ieee80211_local *local = sdata->local; 1238 struct sk_buff *skb; 1239 struct sta_info *sta; 1240 1241 if (!ieee80211_sdata_running(sdata)) 1242 return; 1243 1244 if (test_bit(SCAN_SW_SCANNING, &local->scanning)) 1245 return; 1246 1247 if (!ieee80211_can_run_worker(local)) 1248 return; 1249 1250 /* first process frames */ 1251 while ((skb = skb_dequeue(&sdata->skb_queue))) { 1252 struct ieee80211_mgmt *mgmt = (void *)skb->data; 1253 1254 if (ieee80211_is_action(mgmt->frame_control) && 1255 mgmt->u.action.category == WLAN_CATEGORY_BACK) { 1256 int len = skb->len; 1257 1258 mutex_lock(&local->sta_mtx); 1259 sta = sta_info_get_bss(sdata, mgmt->sa); 1260 if (sta) { 1261 switch (mgmt->u.action.u.addba_req.action_code) { 1262 case WLAN_ACTION_ADDBA_REQ: 1263 ieee80211_process_addba_request( 1264 local, sta, mgmt, len); 1265 break; 1266 case WLAN_ACTION_ADDBA_RESP: 1267 ieee80211_process_addba_resp(local, sta, 1268 mgmt, len); 1269 break; 1270 case WLAN_ACTION_DELBA: 1271 ieee80211_process_delba(sdata, sta, 1272 mgmt, len); 1273 break; 1274 default: 1275 WARN_ON(1); 1276 break; 1277 } 1278 } 1279 mutex_unlock(&local->sta_mtx); 1280 } else if (ieee80211_is_action(mgmt->frame_control) && 1281 mgmt->u.action.category == WLAN_CATEGORY_VHT) { 1282 switch (mgmt->u.action.u.vht_group_notif.action_code) { 1283 case WLAN_VHT_ACTION_OPMODE_NOTIF: { 1284 struct ieee80211_rx_status *status; 1285 enum nl80211_band band; 1286 u8 opmode; 1287 1288 status = IEEE80211_SKB_RXCB(skb); 1289 band = status->band; 1290 opmode = mgmt->u.action.u.vht_opmode_notif.operating_mode; 1291 1292 mutex_lock(&local->sta_mtx); 1293 sta = sta_info_get_bss(sdata, mgmt->sa); 1294 1295 if (sta) 1296 ieee80211_vht_handle_opmode(sdata, sta, 1297 opmode, 1298 band); 1299 1300 mutex_unlock(&local->sta_mtx); 1301 break; 1302 } 1303 case WLAN_VHT_ACTION_GROUPID_MGMT: 1304 ieee80211_process_mu_groups(sdata, mgmt); 1305 break; 1306 default: 1307 WARN_ON(1); 1308 break; 1309 } 1310 } else if (ieee80211_is_data_qos(mgmt->frame_control)) { 1311 struct ieee80211_hdr *hdr = (void *)mgmt; 1312 /* 1313 * So the frame isn't mgmt, but frame_control 1314 * is at the right place anyway, of course, so 1315 * the if statement is correct. 1316 * 1317 * Warn if we have other data frame types here, 1318 * they must not get here. 1319 */ 1320 WARN_ON(hdr->frame_control & 1321 cpu_to_le16(IEEE80211_STYPE_NULLFUNC)); 1322 WARN_ON(!(hdr->seq_ctrl & 1323 cpu_to_le16(IEEE80211_SCTL_FRAG))); 1324 /* 1325 * This was a fragment of a frame, received while 1326 * a block-ack session was active. That cannot be 1327 * right, so terminate the session. 1328 */ 1329 mutex_lock(&local->sta_mtx); 1330 sta = sta_info_get_bss(sdata, mgmt->sa); 1331 if (sta) { 1332 u16 tid = *ieee80211_get_qos_ctl(hdr) & 1333 IEEE80211_QOS_CTL_TID_MASK; 1334 1335 __ieee80211_stop_rx_ba_session( 1336 sta, tid, WLAN_BACK_RECIPIENT, 1337 WLAN_REASON_QSTA_REQUIRE_SETUP, 1338 true); 1339 } 1340 mutex_unlock(&local->sta_mtx); 1341 } else switch (sdata->vif.type) { 1342 case NL80211_IFTYPE_STATION: 1343 ieee80211_sta_rx_queued_mgmt(sdata, skb); 1344 break; 1345 case NL80211_IFTYPE_ADHOC: 1346 ieee80211_ibss_rx_queued_mgmt(sdata, skb); 1347 break; 1348 case NL80211_IFTYPE_MESH_POINT: 1349 if (!ieee80211_vif_is_mesh(&sdata->vif)) 1350 break; 1351 ieee80211_mesh_rx_queued_mgmt(sdata, skb); 1352 break; 1353 default: 1354 WARN(1, "frame for unexpected interface type"); 1355 break; 1356 } 1357 1358 kfree_skb(skb); 1359 } 1360 1361 /* then other type-dependent work */ 1362 switch (sdata->vif.type) { 1363 case NL80211_IFTYPE_STATION: 1364 ieee80211_sta_work(sdata); 1365 break; 1366 case NL80211_IFTYPE_ADHOC: 1367 ieee80211_ibss_work(sdata); 1368 break; 1369 case NL80211_IFTYPE_MESH_POINT: 1370 if (!ieee80211_vif_is_mesh(&sdata->vif)) 1371 break; 1372 ieee80211_mesh_work(sdata); 1373 break; 1374 case NL80211_IFTYPE_OCB: 1375 ieee80211_ocb_work(sdata); 1376 break; 1377 default: 1378 break; 1379 } 1380 } 1381 1382 static void ieee80211_recalc_smps_work(struct work_struct *work) 1383 { 1384 struct ieee80211_sub_if_data *sdata = 1385 container_of(work, struct ieee80211_sub_if_data, recalc_smps); 1386 1387 ieee80211_recalc_smps(sdata); 1388 } 1389 1390 /* 1391 * Helper function to initialise an interface to a specific type. 1392 */ 1393 static void ieee80211_setup_sdata(struct ieee80211_sub_if_data *sdata, 1394 enum nl80211_iftype type) 1395 { 1396 static const u8 bssid_wildcard[ETH_ALEN] = {0xff, 0xff, 0xff, 1397 0xff, 0xff, 0xff}; 1398 1399 /* clear type-dependent union */ 1400 memset(&sdata->u, 0, sizeof(sdata->u)); 1401 1402 /* and set some type-dependent values */ 1403 sdata->vif.type = type; 1404 sdata->vif.p2p = false; 1405 sdata->wdev.iftype = type; 1406 1407 sdata->control_port_protocol = cpu_to_be16(ETH_P_PAE); 1408 sdata->control_port_no_encrypt = false; 1409 sdata->encrypt_headroom = IEEE80211_ENCRYPT_HEADROOM; 1410 sdata->vif.bss_conf.idle = true; 1411 1412 sdata->noack_map = 0; 1413 1414 /* only monitor/p2p-device differ */ 1415 if (sdata->dev) { 1416 sdata->dev->netdev_ops = &ieee80211_dataif_ops; 1417 sdata->dev->type = ARPHRD_ETHER; 1418 } 1419 1420 skb_queue_head_init(&sdata->skb_queue); 1421 INIT_WORK(&sdata->work, ieee80211_iface_work); 1422 INIT_WORK(&sdata->recalc_smps, ieee80211_recalc_smps_work); 1423 INIT_WORK(&sdata->csa_finalize_work, ieee80211_csa_finalize_work); 1424 INIT_LIST_HEAD(&sdata->assigned_chanctx_list); 1425 INIT_LIST_HEAD(&sdata->reserved_chanctx_list); 1426 1427 switch (type) { 1428 case NL80211_IFTYPE_P2P_GO: 1429 type = NL80211_IFTYPE_AP; 1430 sdata->vif.type = type; 1431 sdata->vif.p2p = true; 1432 /* fall through */ 1433 case NL80211_IFTYPE_AP: 1434 skb_queue_head_init(&sdata->u.ap.ps.bc_buf); 1435 INIT_LIST_HEAD(&sdata->u.ap.vlans); 1436 INIT_WORK(&sdata->u.ap.request_smps_work, 1437 ieee80211_request_smps_ap_work); 1438 sdata->vif.bss_conf.bssid = sdata->vif.addr; 1439 sdata->u.ap.req_smps = IEEE80211_SMPS_OFF; 1440 break; 1441 case NL80211_IFTYPE_P2P_CLIENT: 1442 type = NL80211_IFTYPE_STATION; 1443 sdata->vif.type = type; 1444 sdata->vif.p2p = true; 1445 /* fall through */ 1446 case NL80211_IFTYPE_STATION: 1447 sdata->vif.bss_conf.bssid = sdata->u.mgd.bssid; 1448 ieee80211_sta_setup_sdata(sdata); 1449 break; 1450 case NL80211_IFTYPE_OCB: 1451 sdata->vif.bss_conf.bssid = bssid_wildcard; 1452 ieee80211_ocb_setup_sdata(sdata); 1453 break; 1454 case NL80211_IFTYPE_ADHOC: 1455 sdata->vif.bss_conf.bssid = sdata->u.ibss.bssid; 1456 ieee80211_ibss_setup_sdata(sdata); 1457 break; 1458 case NL80211_IFTYPE_MESH_POINT: 1459 if (ieee80211_vif_is_mesh(&sdata->vif)) 1460 ieee80211_mesh_init_sdata(sdata); 1461 break; 1462 case NL80211_IFTYPE_MONITOR: 1463 sdata->dev->type = ARPHRD_IEEE80211_RADIOTAP; 1464 sdata->dev->netdev_ops = &ieee80211_monitorif_ops; 1465 sdata->u.mntr.flags = MONITOR_FLAG_CONTROL | 1466 MONITOR_FLAG_OTHER_BSS; 1467 break; 1468 case NL80211_IFTYPE_WDS: 1469 sdata->vif.bss_conf.bssid = NULL; 1470 break; 1471 case NL80211_IFTYPE_NAN: 1472 idr_init(&sdata->u.nan.function_inst_ids); 1473 spin_lock_init(&sdata->u.nan.func_lock); 1474 sdata->vif.bss_conf.bssid = sdata->vif.addr; 1475 break; 1476 case NL80211_IFTYPE_AP_VLAN: 1477 case NL80211_IFTYPE_P2P_DEVICE: 1478 sdata->vif.bss_conf.bssid = sdata->vif.addr; 1479 break; 1480 case NL80211_IFTYPE_UNSPECIFIED: 1481 case NUM_NL80211_IFTYPES: 1482 BUG(); 1483 break; 1484 } 1485 1486 ieee80211_debugfs_add_netdev(sdata); 1487 } 1488 1489 static int ieee80211_runtime_change_iftype(struct ieee80211_sub_if_data *sdata, 1490 enum nl80211_iftype type) 1491 { 1492 struct ieee80211_local *local = sdata->local; 1493 int ret, err; 1494 enum nl80211_iftype internal_type = type; 1495 bool p2p = false; 1496 1497 ASSERT_RTNL(); 1498 1499 if (!local->ops->change_interface) 1500 return -EBUSY; 1501 1502 switch (sdata->vif.type) { 1503 case NL80211_IFTYPE_AP: 1504 case NL80211_IFTYPE_STATION: 1505 case NL80211_IFTYPE_ADHOC: 1506 case NL80211_IFTYPE_OCB: 1507 /* 1508 * Could maybe also all others here? 1509 * Just not sure how that interacts 1510 * with the RX/config path e.g. for 1511 * mesh. 1512 */ 1513 break; 1514 default: 1515 return -EBUSY; 1516 } 1517 1518 switch (type) { 1519 case NL80211_IFTYPE_AP: 1520 case NL80211_IFTYPE_STATION: 1521 case NL80211_IFTYPE_ADHOC: 1522 case NL80211_IFTYPE_OCB: 1523 /* 1524 * Could probably support everything 1525 * but WDS here (WDS do_open can fail 1526 * under memory pressure, which this 1527 * code isn't prepared to handle). 1528 */ 1529 break; 1530 case NL80211_IFTYPE_P2P_CLIENT: 1531 p2p = true; 1532 internal_type = NL80211_IFTYPE_STATION; 1533 break; 1534 case NL80211_IFTYPE_P2P_GO: 1535 p2p = true; 1536 internal_type = NL80211_IFTYPE_AP; 1537 break; 1538 default: 1539 return -EBUSY; 1540 } 1541 1542 ret = ieee80211_check_concurrent_iface(sdata, internal_type); 1543 if (ret) 1544 return ret; 1545 1546 ieee80211_do_stop(sdata, false); 1547 1548 ieee80211_teardown_sdata(sdata); 1549 1550 ret = drv_change_interface(local, sdata, internal_type, p2p); 1551 if (ret) 1552 type = ieee80211_vif_type_p2p(&sdata->vif); 1553 1554 /* 1555 * Ignore return value here, there's not much we can do since 1556 * the driver changed the interface type internally already. 1557 * The warnings will hopefully make driver authors fix it :-) 1558 */ 1559 ieee80211_check_queues(sdata, type); 1560 1561 ieee80211_setup_sdata(sdata, type); 1562 1563 err = ieee80211_do_open(&sdata->wdev, false); 1564 WARN(err, "type change: do_open returned %d", err); 1565 1566 return ret; 1567 } 1568 1569 int ieee80211_if_change_type(struct ieee80211_sub_if_data *sdata, 1570 enum nl80211_iftype type) 1571 { 1572 int ret; 1573 1574 ASSERT_RTNL(); 1575 1576 if (type == ieee80211_vif_type_p2p(&sdata->vif)) 1577 return 0; 1578 1579 if (ieee80211_sdata_running(sdata)) { 1580 ret = ieee80211_runtime_change_iftype(sdata, type); 1581 if (ret) 1582 return ret; 1583 } else { 1584 /* Purge and reset type-dependent state. */ 1585 ieee80211_teardown_sdata(sdata); 1586 ieee80211_setup_sdata(sdata, type); 1587 } 1588 1589 /* reset some values that shouldn't be kept across type changes */ 1590 if (type == NL80211_IFTYPE_STATION) 1591 sdata->u.mgd.use_4addr = false; 1592 1593 return 0; 1594 } 1595 1596 static void ieee80211_assign_perm_addr(struct ieee80211_local *local, 1597 u8 *perm_addr, enum nl80211_iftype type) 1598 { 1599 struct ieee80211_sub_if_data *sdata; 1600 u64 mask, start, addr, val, inc; 1601 u8 *m; 1602 u8 tmp_addr[ETH_ALEN]; 1603 int i; 1604 1605 /* default ... something at least */ 1606 memcpy(perm_addr, local->hw.wiphy->perm_addr, ETH_ALEN); 1607 1608 if (is_zero_ether_addr(local->hw.wiphy->addr_mask) && 1609 local->hw.wiphy->n_addresses <= 1) 1610 return; 1611 1612 mutex_lock(&local->iflist_mtx); 1613 1614 switch (type) { 1615 case NL80211_IFTYPE_MONITOR: 1616 /* doesn't matter */ 1617 break; 1618 case NL80211_IFTYPE_WDS: 1619 case NL80211_IFTYPE_AP_VLAN: 1620 /* match up with an AP interface */ 1621 list_for_each_entry(sdata, &local->interfaces, list) { 1622 if (sdata->vif.type != NL80211_IFTYPE_AP) 1623 continue; 1624 memcpy(perm_addr, sdata->vif.addr, ETH_ALEN); 1625 break; 1626 } 1627 /* keep default if no AP interface present */ 1628 break; 1629 case NL80211_IFTYPE_P2P_CLIENT: 1630 case NL80211_IFTYPE_P2P_GO: 1631 if (ieee80211_hw_check(&local->hw, P2P_DEV_ADDR_FOR_INTF)) { 1632 list_for_each_entry(sdata, &local->interfaces, list) { 1633 if (sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE) 1634 continue; 1635 if (!ieee80211_sdata_running(sdata)) 1636 continue; 1637 memcpy(perm_addr, sdata->vif.addr, ETH_ALEN); 1638 goto out_unlock; 1639 } 1640 } 1641 /* otherwise fall through */ 1642 default: 1643 /* assign a new address if possible -- try n_addresses first */ 1644 for (i = 0; i < local->hw.wiphy->n_addresses; i++) { 1645 bool used = false; 1646 1647 list_for_each_entry(sdata, &local->interfaces, list) { 1648 if (ether_addr_equal(local->hw.wiphy->addresses[i].addr, 1649 sdata->vif.addr)) { 1650 used = true; 1651 break; 1652 } 1653 } 1654 1655 if (!used) { 1656 memcpy(perm_addr, 1657 local->hw.wiphy->addresses[i].addr, 1658 ETH_ALEN); 1659 break; 1660 } 1661 } 1662 1663 /* try mask if available */ 1664 if (is_zero_ether_addr(local->hw.wiphy->addr_mask)) 1665 break; 1666 1667 m = local->hw.wiphy->addr_mask; 1668 mask = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) | 1669 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) | 1670 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8); 1671 1672 if (__ffs64(mask) + hweight64(mask) != fls64(mask)) { 1673 /* not a contiguous mask ... not handled now! */ 1674 pr_info("not contiguous\n"); 1675 break; 1676 } 1677 1678 /* 1679 * Pick address of existing interface in case user changed 1680 * MAC address manually, default to perm_addr. 1681 */ 1682 m = local->hw.wiphy->perm_addr; 1683 list_for_each_entry(sdata, &local->interfaces, list) { 1684 if (sdata->vif.type == NL80211_IFTYPE_MONITOR) 1685 continue; 1686 m = sdata->vif.addr; 1687 break; 1688 } 1689 start = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) | 1690 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) | 1691 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8); 1692 1693 inc = 1ULL<<__ffs64(mask); 1694 val = (start & mask); 1695 addr = (start & ~mask) | (val & mask); 1696 do { 1697 bool used = false; 1698 1699 tmp_addr[5] = addr >> 0*8; 1700 tmp_addr[4] = addr >> 1*8; 1701 tmp_addr[3] = addr >> 2*8; 1702 tmp_addr[2] = addr >> 3*8; 1703 tmp_addr[1] = addr >> 4*8; 1704 tmp_addr[0] = addr >> 5*8; 1705 1706 val += inc; 1707 1708 list_for_each_entry(sdata, &local->interfaces, list) { 1709 if (ether_addr_equal(tmp_addr, sdata->vif.addr)) { 1710 used = true; 1711 break; 1712 } 1713 } 1714 1715 if (!used) { 1716 memcpy(perm_addr, tmp_addr, ETH_ALEN); 1717 break; 1718 } 1719 addr = (start & ~mask) | (val & mask); 1720 } while (addr != start); 1721 1722 break; 1723 } 1724 1725 out_unlock: 1726 mutex_unlock(&local->iflist_mtx); 1727 } 1728 1729 int ieee80211_if_add(struct ieee80211_local *local, const char *name, 1730 unsigned char name_assign_type, 1731 struct wireless_dev **new_wdev, enum nl80211_iftype type, 1732 struct vif_params *params) 1733 { 1734 struct net_device *ndev = NULL; 1735 struct ieee80211_sub_if_data *sdata = NULL; 1736 struct txq_info *txqi; 1737 void (*if_setup)(struct net_device *dev); 1738 int ret, i; 1739 int txqs = 1; 1740 1741 ASSERT_RTNL(); 1742 1743 if (type == NL80211_IFTYPE_P2P_DEVICE || type == NL80211_IFTYPE_NAN) { 1744 struct wireless_dev *wdev; 1745 1746 sdata = kzalloc(sizeof(*sdata) + local->hw.vif_data_size, 1747 GFP_KERNEL); 1748 if (!sdata) 1749 return -ENOMEM; 1750 wdev = &sdata->wdev; 1751 1752 sdata->dev = NULL; 1753 strlcpy(sdata->name, name, IFNAMSIZ); 1754 ieee80211_assign_perm_addr(local, wdev->address, type); 1755 memcpy(sdata->vif.addr, wdev->address, ETH_ALEN); 1756 } else { 1757 int size = ALIGN(sizeof(*sdata) + local->hw.vif_data_size, 1758 sizeof(void *)); 1759 int txq_size = 0; 1760 1761 if (local->ops->wake_tx_queue) 1762 txq_size += sizeof(struct txq_info) + 1763 local->hw.txq_data_size; 1764 1765 if (local->ops->wake_tx_queue) 1766 if_setup = ieee80211_if_setup_no_queue; 1767 else 1768 if_setup = ieee80211_if_setup; 1769 1770 if (local->hw.queues >= IEEE80211_NUM_ACS) 1771 txqs = IEEE80211_NUM_ACS; 1772 1773 ndev = alloc_netdev_mqs(size + txq_size, 1774 name, name_assign_type, 1775 if_setup, txqs, 1); 1776 if (!ndev) 1777 return -ENOMEM; 1778 dev_net_set(ndev, wiphy_net(local->hw.wiphy)); 1779 1780 ndev->tstats = netdev_alloc_pcpu_stats(struct pcpu_sw_netstats); 1781 if (!ndev->tstats) { 1782 free_netdev(ndev); 1783 return -ENOMEM; 1784 } 1785 1786 ndev->needed_headroom = local->tx_headroom + 1787 4*6 /* four MAC addresses */ 1788 + 2 + 2 + 2 + 2 /* ctl, dur, seq, qos */ 1789 + 6 /* mesh */ 1790 + 8 /* rfc1042/bridge tunnel */ 1791 - ETH_HLEN /* ethernet hard_header_len */ 1792 + IEEE80211_ENCRYPT_HEADROOM; 1793 ndev->needed_tailroom = IEEE80211_ENCRYPT_TAILROOM; 1794 1795 ret = dev_alloc_name(ndev, ndev->name); 1796 if (ret < 0) { 1797 ieee80211_if_free(ndev); 1798 free_netdev(ndev); 1799 return ret; 1800 } 1801 1802 ieee80211_assign_perm_addr(local, ndev->perm_addr, type); 1803 if (params && is_valid_ether_addr(params->macaddr)) 1804 memcpy(ndev->dev_addr, params->macaddr, ETH_ALEN); 1805 else 1806 memcpy(ndev->dev_addr, ndev->perm_addr, ETH_ALEN); 1807 SET_NETDEV_DEV(ndev, wiphy_dev(local->hw.wiphy)); 1808 1809 /* don't use IEEE80211_DEV_TO_SUB_IF -- it checks too much */ 1810 sdata = netdev_priv(ndev); 1811 ndev->ieee80211_ptr = &sdata->wdev; 1812 memcpy(sdata->vif.addr, ndev->dev_addr, ETH_ALEN); 1813 memcpy(sdata->name, ndev->name, IFNAMSIZ); 1814 1815 if (txq_size) { 1816 txqi = netdev_priv(ndev) + size; 1817 ieee80211_txq_init(sdata, NULL, txqi, 0); 1818 } 1819 1820 sdata->dev = ndev; 1821 } 1822 1823 /* initialise type-independent data */ 1824 sdata->wdev.wiphy = local->hw.wiphy; 1825 sdata->local = local; 1826 1827 for (i = 0; i < IEEE80211_FRAGMENT_MAX; i++) 1828 skb_queue_head_init(&sdata->fragments[i].skb_list); 1829 1830 INIT_LIST_HEAD(&sdata->key_list); 1831 1832 INIT_DELAYED_WORK(&sdata->dfs_cac_timer_work, 1833 ieee80211_dfs_cac_timer_work); 1834 INIT_DELAYED_WORK(&sdata->dec_tailroom_needed_wk, 1835 ieee80211_delayed_tailroom_dec); 1836 1837 for (i = 0; i < NUM_NL80211_BANDS; i++) { 1838 struct ieee80211_supported_band *sband; 1839 sband = local->hw.wiphy->bands[i]; 1840 sdata->rc_rateidx_mask[i] = 1841 sband ? (1 << sband->n_bitrates) - 1 : 0; 1842 if (sband) { 1843 __le16 cap; 1844 u16 *vht_rate_mask; 1845 1846 memcpy(sdata->rc_rateidx_mcs_mask[i], 1847 sband->ht_cap.mcs.rx_mask, 1848 sizeof(sdata->rc_rateidx_mcs_mask[i])); 1849 1850 cap = sband->vht_cap.vht_mcs.rx_mcs_map; 1851 vht_rate_mask = sdata->rc_rateidx_vht_mcs_mask[i]; 1852 ieee80211_get_vht_mask_from_cap(cap, vht_rate_mask); 1853 } else { 1854 memset(sdata->rc_rateidx_mcs_mask[i], 0, 1855 sizeof(sdata->rc_rateidx_mcs_mask[i])); 1856 memset(sdata->rc_rateidx_vht_mcs_mask[i], 0, 1857 sizeof(sdata->rc_rateidx_vht_mcs_mask[i])); 1858 } 1859 } 1860 1861 ieee80211_set_default_queues(sdata); 1862 1863 sdata->ap_power_level = IEEE80211_UNSET_POWER_LEVEL; 1864 sdata->user_power_level = local->user_power_level; 1865 1866 sdata->encrypt_headroom = IEEE80211_ENCRYPT_HEADROOM; 1867 1868 /* setup type-dependent data */ 1869 ieee80211_setup_sdata(sdata, type); 1870 1871 if (ndev) { 1872 if (params) { 1873 ndev->ieee80211_ptr->use_4addr = params->use_4addr; 1874 if (type == NL80211_IFTYPE_STATION) 1875 sdata->u.mgd.use_4addr = params->use_4addr; 1876 } 1877 1878 ndev->features |= local->hw.netdev_features; 1879 1880 netdev_set_default_ethtool_ops(ndev, &ieee80211_ethtool_ops); 1881 1882 /* MTU range: 256 - 2304 */ 1883 ndev->min_mtu = 256; 1884 ndev->max_mtu = IEEE80211_MAX_DATA_LEN; 1885 1886 ret = register_netdevice(ndev); 1887 if (ret) { 1888 free_netdev(ndev); 1889 return ret; 1890 } 1891 } 1892 1893 mutex_lock(&local->iflist_mtx); 1894 list_add_tail_rcu(&sdata->list, &local->interfaces); 1895 mutex_unlock(&local->iflist_mtx); 1896 1897 if (new_wdev) 1898 *new_wdev = &sdata->wdev; 1899 1900 return 0; 1901 } 1902 1903 void ieee80211_if_remove(struct ieee80211_sub_if_data *sdata) 1904 { 1905 ASSERT_RTNL(); 1906 1907 mutex_lock(&sdata->local->iflist_mtx); 1908 list_del_rcu(&sdata->list); 1909 mutex_unlock(&sdata->local->iflist_mtx); 1910 1911 synchronize_rcu(); 1912 1913 if (sdata->dev) { 1914 unregister_netdevice(sdata->dev); 1915 } else { 1916 cfg80211_unregister_wdev(&sdata->wdev); 1917 ieee80211_teardown_sdata(sdata); 1918 kfree(sdata); 1919 } 1920 } 1921 1922 void ieee80211_sdata_stop(struct ieee80211_sub_if_data *sdata) 1923 { 1924 if (WARN_ON_ONCE(!test_bit(SDATA_STATE_RUNNING, &sdata->state))) 1925 return; 1926 ieee80211_do_stop(sdata, true); 1927 } 1928 1929 void ieee80211_remove_interfaces(struct ieee80211_local *local) 1930 { 1931 struct ieee80211_sub_if_data *sdata, *tmp; 1932 LIST_HEAD(unreg_list); 1933 LIST_HEAD(wdev_list); 1934 1935 ASSERT_RTNL(); 1936 1937 /* Before destroying the interfaces, make sure they're all stopped so 1938 * that the hardware is stopped. Otherwise, the driver might still be 1939 * iterating the interfaces during the shutdown, e.g. from a worker 1940 * or from RX processing or similar, and if it does so (using atomic 1941 * iteration) while we're manipulating the list, the iteration will 1942 * crash. 1943 * 1944 * After this, the hardware should be stopped and the driver should 1945 * have stopped all of its activities, so that we can do RCU-unaware 1946 * manipulations of the interface list below. 1947 */ 1948 cfg80211_shutdown_all_interfaces(local->hw.wiphy); 1949 1950 WARN(local->open_count, "%s: open count remains %d\n", 1951 wiphy_name(local->hw.wiphy), local->open_count); 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