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 if (sdata->vif.type == NL80211_IFTYPE_WDS) { 680 /* Create STA entry for the WDS peer */ 681 sta = sta_info_alloc(sdata, sdata->u.wds.remote_addr, 682 GFP_KERNEL); 683 if (!sta) { 684 res = -ENOMEM; 685 goto err_del_interface; 686 } 687 688 sta_info_pre_move_state(sta, IEEE80211_STA_AUTH); 689 sta_info_pre_move_state(sta, IEEE80211_STA_ASSOC); 690 sta_info_pre_move_state(sta, IEEE80211_STA_AUTHORIZED); 691 692 res = sta_info_insert(sta); 693 if (res) { 694 /* STA has been freed */ 695 goto err_del_interface; 696 } 697 698 rate_control_rate_init(sta); 699 netif_carrier_on(dev); 700 } else if (sdata->vif.type == NL80211_IFTYPE_P2P_DEVICE) { 701 rcu_assign_pointer(local->p2p_sdata, sdata); 702 } 703 704 /* 705 * set_multicast_list will be invoked by the networking core 706 * which will check whether any increments here were done in 707 * error and sync them down to the hardware as filter flags. 708 */ 709 if (sdata->flags & IEEE80211_SDATA_ALLMULTI) 710 atomic_inc(&local->iff_allmultis); 711 712 if (coming_up) 713 local->open_count++; 714 715 if (hw_reconf_flags) 716 ieee80211_hw_config(local, hw_reconf_flags); 717 718 ieee80211_recalc_ps(local); 719 720 if (sdata->vif.type == NL80211_IFTYPE_MONITOR || 721 sdata->vif.type == NL80211_IFTYPE_AP_VLAN) { 722 /* XXX: for AP_VLAN, actually track AP queues */ 723 netif_tx_start_all_queues(dev); 724 } else if (dev) { 725 unsigned long flags; 726 int n_acs = IEEE80211_NUM_ACS; 727 int ac; 728 729 if (local->hw.queues < IEEE80211_NUM_ACS) 730 n_acs = 1; 731 732 spin_lock_irqsave(&local->queue_stop_reason_lock, flags); 733 if (sdata->vif.cab_queue == IEEE80211_INVAL_HW_QUEUE || 734 (local->queue_stop_reasons[sdata->vif.cab_queue] == 0 && 735 skb_queue_empty(&local->pending[sdata->vif.cab_queue]))) { 736 for (ac = 0; ac < n_acs; ac++) { 737 int ac_queue = sdata->vif.hw_queue[ac]; 738 739 if (local->queue_stop_reasons[ac_queue] == 0 && 740 skb_queue_empty(&local->pending[ac_queue])) 741 netif_start_subqueue(dev, ac); 742 } 743 } 744 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); 745 } 746 747 return 0; 748 err_del_interface: 749 drv_remove_interface(local, sdata); 750 err_stop: 751 if (!local->open_count) 752 drv_stop(local); 753 err_del_bss: 754 sdata->bss = NULL; 755 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) { 756 mutex_lock(&local->mtx); 757 list_del(&sdata->u.vlan.list); 758 mutex_unlock(&local->mtx); 759 } 760 /* might already be clear but that doesn't matter */ 761 clear_bit(SDATA_STATE_RUNNING, &sdata->state); 762 return res; 763 } 764 765 static int ieee80211_open(struct net_device *dev) 766 { 767 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); 768 int err; 769 770 /* fail early if user set an invalid address */ 771 if (!is_valid_ether_addr(dev->dev_addr)) 772 return -EADDRNOTAVAIL; 773 774 err = ieee80211_check_concurrent_iface(sdata, sdata->vif.type); 775 if (err) 776 return err; 777 778 return ieee80211_do_open(&sdata->wdev, true); 779 } 780 781 static void ieee80211_do_stop(struct ieee80211_sub_if_data *sdata, 782 bool going_down) 783 { 784 struct ieee80211_local *local = sdata->local; 785 struct fq *fq = &local->fq; 786 unsigned long flags; 787 struct sk_buff *skb, *tmp; 788 u32 hw_reconf_flags = 0; 789 int i, flushed; 790 struct ps_data *ps; 791 struct cfg80211_chan_def chandef; 792 bool cancel_scan; 793 struct cfg80211_nan_func *func; 794 795 clear_bit(SDATA_STATE_RUNNING, &sdata->state); 796 797 cancel_scan = rcu_access_pointer(local->scan_sdata) == sdata; 798 if (cancel_scan) 799 ieee80211_scan_cancel(local); 800 801 /* 802 * Stop TX on this interface first. 803 */ 804 if (sdata->dev) 805 netif_tx_stop_all_queues(sdata->dev); 806 807 ieee80211_roc_purge(local, sdata); 808 809 switch (sdata->vif.type) { 810 case NL80211_IFTYPE_STATION: 811 ieee80211_mgd_stop(sdata); 812 break; 813 case NL80211_IFTYPE_ADHOC: 814 ieee80211_ibss_stop(sdata); 815 break; 816 case NL80211_IFTYPE_AP: 817 cancel_work_sync(&sdata->u.ap.request_smps_work); 818 break; 819 default: 820 break; 821 } 822 823 /* 824 * Remove all stations associated with this interface. 825 * 826 * This must be done before calling ops->remove_interface() 827 * because otherwise we can later invoke ops->sta_notify() 828 * whenever the STAs are removed, and that invalidates driver 829 * assumptions about always getting a vif pointer that is valid 830 * (because if we remove a STA after ops->remove_interface() 831 * the driver will have removed the vif info already!) 832 * 833 * In WDS mode a station must exist here and be flushed, for 834 * AP_VLANs stations may exist since there's nothing else that 835 * would have removed them, but in other modes there shouldn't 836 * be any stations. 837 */ 838 flushed = sta_info_flush(sdata); 839 WARN_ON_ONCE(sdata->vif.type != NL80211_IFTYPE_AP_VLAN && 840 ((sdata->vif.type != NL80211_IFTYPE_WDS && flushed > 0) || 841 (sdata->vif.type == NL80211_IFTYPE_WDS && flushed != 1))); 842 843 /* don't count this interface for allmulti while it is down */ 844 if (sdata->flags & IEEE80211_SDATA_ALLMULTI) 845 atomic_dec(&local->iff_allmultis); 846 847 if (sdata->vif.type == NL80211_IFTYPE_AP) { 848 local->fif_pspoll--; 849 local->fif_probe_req--; 850 } else if (sdata->vif.type == NL80211_IFTYPE_ADHOC) { 851 local->fif_probe_req--; 852 } 853 854 if (sdata->dev) { 855 netif_addr_lock_bh(sdata->dev); 856 spin_lock_bh(&local->filter_lock); 857 __hw_addr_unsync(&local->mc_list, &sdata->dev->mc, 858 sdata->dev->addr_len); 859 spin_unlock_bh(&local->filter_lock); 860 netif_addr_unlock_bh(sdata->dev); 861 } 862 863 del_timer_sync(&local->dynamic_ps_timer); 864 cancel_work_sync(&local->dynamic_ps_enable_work); 865 866 cancel_work_sync(&sdata->recalc_smps); 867 sdata_lock(sdata); 868 mutex_lock(&local->mtx); 869 sdata->vif.csa_active = false; 870 if (sdata->vif.type == NL80211_IFTYPE_STATION) 871 sdata->u.mgd.csa_waiting_bcn = false; 872 if (sdata->csa_block_tx) { 873 ieee80211_wake_vif_queues(local, sdata, 874 IEEE80211_QUEUE_STOP_REASON_CSA); 875 sdata->csa_block_tx = false; 876 } 877 mutex_unlock(&local->mtx); 878 sdata_unlock(sdata); 879 880 cancel_work_sync(&sdata->csa_finalize_work); 881 882 cancel_delayed_work_sync(&sdata->dfs_cac_timer_work); 883 884 if (sdata->wdev.cac_started) { 885 chandef = sdata->vif.bss_conf.chandef; 886 WARN_ON(local->suspended); 887 mutex_lock(&local->mtx); 888 ieee80211_vif_release_channel(sdata); 889 mutex_unlock(&local->mtx); 890 cfg80211_cac_event(sdata->dev, &chandef, 891 NL80211_RADAR_CAC_ABORTED, 892 GFP_KERNEL); 893 } 894 895 /* APs need special treatment */ 896 if (sdata->vif.type == NL80211_IFTYPE_AP) { 897 struct ieee80211_sub_if_data *vlan, *tmpsdata; 898 899 /* down all dependent devices, that is VLANs */ 900 list_for_each_entry_safe(vlan, tmpsdata, &sdata->u.ap.vlans, 901 u.vlan.list) 902 dev_close(vlan->dev); 903 WARN_ON(!list_empty(&sdata->u.ap.vlans)); 904 } else if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) { 905 /* remove all packets in parent bc_buf pointing to this dev */ 906 ps = &sdata->bss->ps; 907 908 spin_lock_irqsave(&ps->bc_buf.lock, flags); 909 skb_queue_walk_safe(&ps->bc_buf, skb, tmp) { 910 if (skb->dev == sdata->dev) { 911 __skb_unlink(skb, &ps->bc_buf); 912 local->total_ps_buffered--; 913 ieee80211_free_txskb(&local->hw, skb); 914 } 915 } 916 spin_unlock_irqrestore(&ps->bc_buf.lock, flags); 917 } 918 919 if (going_down) 920 local->open_count--; 921 922 switch (sdata->vif.type) { 923 case NL80211_IFTYPE_AP_VLAN: 924 mutex_lock(&local->mtx); 925 list_del(&sdata->u.vlan.list); 926 mutex_unlock(&local->mtx); 927 RCU_INIT_POINTER(sdata->vif.chanctx_conf, NULL); 928 /* see comment in the default case below */ 929 ieee80211_free_keys(sdata, true); 930 /* no need to tell driver */ 931 break; 932 case NL80211_IFTYPE_MONITOR: 933 if (sdata->u.mntr.flags & MONITOR_FLAG_COOK_FRAMES) { 934 local->cooked_mntrs--; 935 break; 936 } 937 938 local->monitors--; 939 if (local->monitors == 0) { 940 local->hw.conf.flags &= ~IEEE80211_CONF_MONITOR; 941 hw_reconf_flags |= IEEE80211_CONF_CHANGE_MONITOR; 942 } 943 944 ieee80211_adjust_monitor_flags(sdata, -1); 945 break; 946 case NL80211_IFTYPE_NAN: 947 /* clean all the functions */ 948 spin_lock_bh(&sdata->u.nan.func_lock); 949 950 idr_for_each_entry(&sdata->u.nan.function_inst_ids, func, i) { 951 idr_remove(&sdata->u.nan.function_inst_ids, i); 952 cfg80211_free_nan_func(func); 953 } 954 idr_destroy(&sdata->u.nan.function_inst_ids); 955 956 spin_unlock_bh(&sdata->u.nan.func_lock); 957 break; 958 case NL80211_IFTYPE_P2P_DEVICE: 959 /* relies on synchronize_rcu() below */ 960 RCU_INIT_POINTER(local->p2p_sdata, NULL); 961 /* fall through */ 962 default: 963 cancel_work_sync(&sdata->work); 964 /* 965 * When we get here, the interface is marked down. 966 * Free the remaining keys, if there are any 967 * (which can happen in AP mode if userspace sets 968 * keys before the interface is operating, and maybe 969 * also in WDS mode) 970 * 971 * Force the key freeing to always synchronize_net() 972 * to wait for the RX path in case it is using this 973 * interface enqueuing frames at this very time on 974 * another CPU. 975 */ 976 ieee80211_free_keys(sdata, true); 977 skb_queue_purge(&sdata->skb_queue); 978 } 979 980 sdata->bss = NULL; 981 982 spin_lock_irqsave(&local->queue_stop_reason_lock, flags); 983 for (i = 0; i < IEEE80211_MAX_QUEUES; i++) { 984 skb_queue_walk_safe(&local->pending[i], skb, tmp) { 985 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); 986 if (info->control.vif == &sdata->vif) { 987 __skb_unlink(skb, &local->pending[i]); 988 ieee80211_free_txskb(&local->hw, skb); 989 } 990 } 991 } 992 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); 993 994 if (sdata->vif.txq) { 995 struct txq_info *txqi = to_txq_info(sdata->vif.txq); 996 997 spin_lock_bh(&fq->lock); 998 ieee80211_txq_purge(local, txqi); 999 spin_unlock_bh(&fq->lock); 1000 } 1001 1002 if (local->open_count == 0) 1003 ieee80211_clear_tx_pending(local); 1004 1005 /* 1006 * If the interface goes down while suspended, presumably because 1007 * the device was unplugged and that happens before our resume, 1008 * then the driver is already unconfigured and the remainder of 1009 * this function isn't needed. 1010 * XXX: what about WoWLAN? If the device has software state, e.g. 1011 * memory allocated, it might expect teardown commands from 1012 * mac80211 here? 1013 */ 1014 if (local->suspended) { 1015 WARN_ON(local->wowlan); 1016 WARN_ON(rtnl_dereference(local->monitor_sdata)); 1017 return; 1018 } 1019 1020 switch (sdata->vif.type) { 1021 case NL80211_IFTYPE_AP_VLAN: 1022 break; 1023 case NL80211_IFTYPE_MONITOR: 1024 if (local->monitors == 0) 1025 ieee80211_del_virtual_monitor(local); 1026 1027 mutex_lock(&local->mtx); 1028 ieee80211_recalc_idle(local); 1029 mutex_unlock(&local->mtx); 1030 1031 if (!(sdata->u.mntr.flags & MONITOR_FLAG_ACTIVE)) 1032 break; 1033 1034 /* fall through */ 1035 default: 1036 if (going_down) 1037 drv_remove_interface(local, sdata); 1038 } 1039 1040 ieee80211_recalc_ps(local); 1041 1042 if (cancel_scan) 1043 flush_delayed_work(&local->scan_work); 1044 1045 if (local->open_count == 0) { 1046 ieee80211_stop_device(local); 1047 1048 /* no reconfiguring after stop! */ 1049 return; 1050 } 1051 1052 /* do after stop to avoid reconfiguring when we stop anyway */ 1053 ieee80211_configure_filter(local); 1054 ieee80211_hw_config(local, hw_reconf_flags); 1055 1056 if (local->monitors == local->open_count) 1057 ieee80211_add_virtual_monitor(local); 1058 } 1059 1060 static int ieee80211_stop(struct net_device *dev) 1061 { 1062 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); 1063 1064 ieee80211_do_stop(sdata, true); 1065 1066 return 0; 1067 } 1068 1069 static void ieee80211_set_multicast_list(struct net_device *dev) 1070 { 1071 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); 1072 struct ieee80211_local *local = sdata->local; 1073 int allmulti, sdata_allmulti; 1074 1075 allmulti = !!(dev->flags & IFF_ALLMULTI); 1076 sdata_allmulti = !!(sdata->flags & IEEE80211_SDATA_ALLMULTI); 1077 1078 if (allmulti != sdata_allmulti) { 1079 if (dev->flags & IFF_ALLMULTI) 1080 atomic_inc(&local->iff_allmultis); 1081 else 1082 atomic_dec(&local->iff_allmultis); 1083 sdata->flags ^= IEEE80211_SDATA_ALLMULTI; 1084 } 1085 1086 spin_lock_bh(&local->filter_lock); 1087 __hw_addr_sync(&local->mc_list, &dev->mc, dev->addr_len); 1088 spin_unlock_bh(&local->filter_lock); 1089 ieee80211_queue_work(&local->hw, &local->reconfig_filter); 1090 } 1091 1092 /* 1093 * Called when the netdev is removed or, by the code below, before 1094 * the interface type changes. 1095 */ 1096 static void ieee80211_teardown_sdata(struct ieee80211_sub_if_data *sdata) 1097 { 1098 int i; 1099 1100 /* free extra data */ 1101 ieee80211_free_keys(sdata, false); 1102 1103 ieee80211_debugfs_remove_netdev(sdata); 1104 1105 for (i = 0; i < IEEE80211_FRAGMENT_MAX; i++) 1106 __skb_queue_purge(&sdata->fragments[i].skb_list); 1107 sdata->fragment_next = 0; 1108 1109 if (ieee80211_vif_is_mesh(&sdata->vif)) 1110 ieee80211_mesh_teardown_sdata(sdata); 1111 } 1112 1113 static void ieee80211_uninit(struct net_device *dev) 1114 { 1115 ieee80211_teardown_sdata(IEEE80211_DEV_TO_SUB_IF(dev)); 1116 } 1117 1118 static u16 ieee80211_netdev_select_queue(struct net_device *dev, 1119 struct sk_buff *skb, 1120 void *accel_priv, 1121 select_queue_fallback_t fallback) 1122 { 1123 return ieee80211_select_queue(IEEE80211_DEV_TO_SUB_IF(dev), skb); 1124 } 1125 1126 static struct rtnl_link_stats64 * 1127 ieee80211_get_stats64(struct net_device *dev, struct rtnl_link_stats64 *stats) 1128 { 1129 int i; 1130 1131 for_each_possible_cpu(i) { 1132 const struct pcpu_sw_netstats *tstats; 1133 u64 rx_packets, rx_bytes, tx_packets, tx_bytes; 1134 unsigned int start; 1135 1136 tstats = per_cpu_ptr(dev->tstats, i); 1137 1138 do { 1139 start = u64_stats_fetch_begin_irq(&tstats->syncp); 1140 rx_packets = tstats->rx_packets; 1141 tx_packets = tstats->tx_packets; 1142 rx_bytes = tstats->rx_bytes; 1143 tx_bytes = tstats->tx_bytes; 1144 } while (u64_stats_fetch_retry_irq(&tstats->syncp, start)); 1145 1146 stats->rx_packets += rx_packets; 1147 stats->tx_packets += tx_packets; 1148 stats->rx_bytes += rx_bytes; 1149 stats->tx_bytes += tx_bytes; 1150 } 1151 1152 return stats; 1153 } 1154 1155 static const struct net_device_ops ieee80211_dataif_ops = { 1156 .ndo_open = ieee80211_open, 1157 .ndo_stop = ieee80211_stop, 1158 .ndo_uninit = ieee80211_uninit, 1159 .ndo_start_xmit = ieee80211_subif_start_xmit, 1160 .ndo_set_rx_mode = ieee80211_set_multicast_list, 1161 .ndo_set_mac_address = ieee80211_change_mac, 1162 .ndo_select_queue = ieee80211_netdev_select_queue, 1163 .ndo_get_stats64 = ieee80211_get_stats64, 1164 }; 1165 1166 static u16 ieee80211_monitor_select_queue(struct net_device *dev, 1167 struct sk_buff *skb, 1168 void *accel_priv, 1169 select_queue_fallback_t fallback) 1170 { 1171 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); 1172 struct ieee80211_local *local = sdata->local; 1173 struct ieee80211_hdr *hdr; 1174 struct ieee80211_radiotap_header *rtap = (void *)skb->data; 1175 1176 if (local->hw.queues < IEEE80211_NUM_ACS) 1177 return 0; 1178 1179 if (skb->len < 4 || 1180 skb->len < le16_to_cpu(rtap->it_len) + 2 /* frame control */) 1181 return 0; /* doesn't matter, frame will be dropped */ 1182 1183 hdr = (void *)((u8 *)skb->data + le16_to_cpu(rtap->it_len)); 1184 1185 return ieee80211_select_queue_80211(sdata, skb, hdr); 1186 } 1187 1188 static const struct net_device_ops ieee80211_monitorif_ops = { 1189 .ndo_open = ieee80211_open, 1190 .ndo_stop = ieee80211_stop, 1191 .ndo_uninit = ieee80211_uninit, 1192 .ndo_start_xmit = ieee80211_monitor_start_xmit, 1193 .ndo_set_rx_mode = ieee80211_set_multicast_list, 1194 .ndo_set_mac_address = ieee80211_change_mac, 1195 .ndo_select_queue = ieee80211_monitor_select_queue, 1196 .ndo_get_stats64 = ieee80211_get_stats64, 1197 }; 1198 1199 static void ieee80211_if_free(struct net_device *dev) 1200 { 1201 free_percpu(dev->tstats); 1202 free_netdev(dev); 1203 } 1204 1205 static void ieee80211_if_setup(struct net_device *dev) 1206 { 1207 ether_setup(dev); 1208 dev->priv_flags &= ~IFF_TX_SKB_SHARING; 1209 dev->netdev_ops = &ieee80211_dataif_ops; 1210 dev->destructor = ieee80211_if_free; 1211 } 1212 1213 static void ieee80211_if_setup_no_queue(struct net_device *dev) 1214 { 1215 ieee80211_if_setup(dev); 1216 dev->priv_flags |= IFF_NO_QUEUE; 1217 } 1218 1219 static void ieee80211_iface_work(struct work_struct *work) 1220 { 1221 struct ieee80211_sub_if_data *sdata = 1222 container_of(work, struct ieee80211_sub_if_data, work); 1223 struct ieee80211_local *local = sdata->local; 1224 struct sk_buff *skb; 1225 struct sta_info *sta; 1226 struct ieee80211_ra_tid *ra_tid; 1227 struct ieee80211_rx_agg *rx_agg; 1228 1229 if (!ieee80211_sdata_running(sdata)) 1230 return; 1231 1232 if (test_bit(SCAN_SW_SCANNING, &local->scanning)) 1233 return; 1234 1235 if (!ieee80211_can_run_worker(local)) 1236 return; 1237 1238 /* first process frames */ 1239 while ((skb = skb_dequeue(&sdata->skb_queue))) { 1240 struct ieee80211_mgmt *mgmt = (void *)skb->data; 1241 1242 if (skb->pkt_type == IEEE80211_SDATA_QUEUE_AGG_START) { 1243 ra_tid = (void *)&skb->cb; 1244 ieee80211_start_tx_ba_cb(&sdata->vif, ra_tid->ra, 1245 ra_tid->tid); 1246 } else if (skb->pkt_type == IEEE80211_SDATA_QUEUE_AGG_STOP) { 1247 ra_tid = (void *)&skb->cb; 1248 ieee80211_stop_tx_ba_cb(&sdata->vif, ra_tid->ra, 1249 ra_tid->tid); 1250 } else if (skb->pkt_type == IEEE80211_SDATA_QUEUE_RX_AGG_START) { 1251 rx_agg = (void *)&skb->cb; 1252 mutex_lock(&local->sta_mtx); 1253 sta = sta_info_get_bss(sdata, rx_agg->addr); 1254 if (sta) 1255 __ieee80211_start_rx_ba_session(sta, 1256 0, 0, 0, 1, rx_agg->tid, 1257 IEEE80211_MAX_AMPDU_BUF, 1258 false, true); 1259 mutex_unlock(&local->sta_mtx); 1260 } else if (skb->pkt_type == IEEE80211_SDATA_QUEUE_RX_AGG_STOP) { 1261 rx_agg = (void *)&skb->cb; 1262 mutex_lock(&local->sta_mtx); 1263 sta = sta_info_get_bss(sdata, rx_agg->addr); 1264 if (sta) 1265 __ieee80211_stop_rx_ba_session(sta, 1266 rx_agg->tid, 1267 WLAN_BACK_RECIPIENT, 0, 1268 false); 1269 mutex_unlock(&local->sta_mtx); 1270 } else if (ieee80211_is_action(mgmt->frame_control) && 1271 mgmt->u.action.category == WLAN_CATEGORY_BACK) { 1272 int len = skb->len; 1273 1274 mutex_lock(&local->sta_mtx); 1275 sta = sta_info_get_bss(sdata, mgmt->sa); 1276 if (sta) { 1277 switch (mgmt->u.action.u.addba_req.action_code) { 1278 case WLAN_ACTION_ADDBA_REQ: 1279 ieee80211_process_addba_request( 1280 local, sta, mgmt, len); 1281 break; 1282 case WLAN_ACTION_ADDBA_RESP: 1283 ieee80211_process_addba_resp(local, sta, 1284 mgmt, len); 1285 break; 1286 case WLAN_ACTION_DELBA: 1287 ieee80211_process_delba(sdata, sta, 1288 mgmt, len); 1289 break; 1290 default: 1291 WARN_ON(1); 1292 break; 1293 } 1294 } 1295 mutex_unlock(&local->sta_mtx); 1296 } else if (ieee80211_is_action(mgmt->frame_control) && 1297 mgmt->u.action.category == WLAN_CATEGORY_VHT) { 1298 switch (mgmt->u.action.u.vht_group_notif.action_code) { 1299 case WLAN_VHT_ACTION_OPMODE_NOTIF: { 1300 struct ieee80211_rx_status *status; 1301 enum nl80211_band band; 1302 u8 opmode; 1303 1304 status = IEEE80211_SKB_RXCB(skb); 1305 band = status->band; 1306 opmode = mgmt->u.action.u.vht_opmode_notif.operating_mode; 1307 1308 mutex_lock(&local->sta_mtx); 1309 sta = sta_info_get_bss(sdata, mgmt->sa); 1310 1311 if (sta) 1312 ieee80211_vht_handle_opmode(sdata, sta, 1313 opmode, 1314 band); 1315 1316 mutex_unlock(&local->sta_mtx); 1317 break; 1318 } 1319 case WLAN_VHT_ACTION_GROUPID_MGMT: 1320 ieee80211_process_mu_groups(sdata, mgmt); 1321 break; 1322 default: 1323 WARN_ON(1); 1324 break; 1325 } 1326 } else if (ieee80211_is_data_qos(mgmt->frame_control)) { 1327 struct ieee80211_hdr *hdr = (void *)mgmt; 1328 /* 1329 * So the frame isn't mgmt, but frame_control 1330 * is at the right place anyway, of course, so 1331 * the if statement is correct. 1332 * 1333 * Warn if we have other data frame types here, 1334 * they must not get here. 1335 */ 1336 WARN_ON(hdr->frame_control & 1337 cpu_to_le16(IEEE80211_STYPE_NULLFUNC)); 1338 WARN_ON(!(hdr->seq_ctrl & 1339 cpu_to_le16(IEEE80211_SCTL_FRAG))); 1340 /* 1341 * This was a fragment of a frame, received while 1342 * a block-ack session was active. That cannot be 1343 * right, so terminate the session. 1344 */ 1345 mutex_lock(&local->sta_mtx); 1346 sta = sta_info_get_bss(sdata, mgmt->sa); 1347 if (sta) { 1348 u16 tid = *ieee80211_get_qos_ctl(hdr) & 1349 IEEE80211_QOS_CTL_TID_MASK; 1350 1351 __ieee80211_stop_rx_ba_session( 1352 sta, tid, WLAN_BACK_RECIPIENT, 1353 WLAN_REASON_QSTA_REQUIRE_SETUP, 1354 true); 1355 } 1356 mutex_unlock(&local->sta_mtx); 1357 } else switch (sdata->vif.type) { 1358 case NL80211_IFTYPE_STATION: 1359 ieee80211_sta_rx_queued_mgmt(sdata, skb); 1360 break; 1361 case NL80211_IFTYPE_ADHOC: 1362 ieee80211_ibss_rx_queued_mgmt(sdata, skb); 1363 break; 1364 case NL80211_IFTYPE_MESH_POINT: 1365 if (!ieee80211_vif_is_mesh(&sdata->vif)) 1366 break; 1367 ieee80211_mesh_rx_queued_mgmt(sdata, skb); 1368 break; 1369 default: 1370 WARN(1, "frame for unexpected interface type"); 1371 break; 1372 } 1373 1374 kfree_skb(skb); 1375 } 1376 1377 /* then other type-dependent work */ 1378 switch (sdata->vif.type) { 1379 case NL80211_IFTYPE_STATION: 1380 ieee80211_sta_work(sdata); 1381 break; 1382 case NL80211_IFTYPE_ADHOC: 1383 ieee80211_ibss_work(sdata); 1384 break; 1385 case NL80211_IFTYPE_MESH_POINT: 1386 if (!ieee80211_vif_is_mesh(&sdata->vif)) 1387 break; 1388 ieee80211_mesh_work(sdata); 1389 break; 1390 case NL80211_IFTYPE_OCB: 1391 ieee80211_ocb_work(sdata); 1392 break; 1393 default: 1394 break; 1395 } 1396 } 1397 1398 static void ieee80211_recalc_smps_work(struct work_struct *work) 1399 { 1400 struct ieee80211_sub_if_data *sdata = 1401 container_of(work, struct ieee80211_sub_if_data, recalc_smps); 1402 1403 ieee80211_recalc_smps(sdata); 1404 } 1405 1406 /* 1407 * Helper function to initialise an interface to a specific type. 1408 */ 1409 static void ieee80211_setup_sdata(struct ieee80211_sub_if_data *sdata, 1410 enum nl80211_iftype type) 1411 { 1412 static const u8 bssid_wildcard[ETH_ALEN] = {0xff, 0xff, 0xff, 1413 0xff, 0xff, 0xff}; 1414 1415 /* clear type-dependent union */ 1416 memset(&sdata->u, 0, sizeof(sdata->u)); 1417 1418 /* and set some type-dependent values */ 1419 sdata->vif.type = type; 1420 sdata->vif.p2p = false; 1421 sdata->wdev.iftype = type; 1422 1423 sdata->control_port_protocol = cpu_to_be16(ETH_P_PAE); 1424 sdata->control_port_no_encrypt = false; 1425 sdata->encrypt_headroom = IEEE80211_ENCRYPT_HEADROOM; 1426 sdata->vif.bss_conf.idle = true; 1427 1428 sdata->noack_map = 0; 1429 1430 /* only monitor/p2p-device differ */ 1431 if (sdata->dev) { 1432 sdata->dev->netdev_ops = &ieee80211_dataif_ops; 1433 sdata->dev->type = ARPHRD_ETHER; 1434 } 1435 1436 skb_queue_head_init(&sdata->skb_queue); 1437 INIT_WORK(&sdata->work, ieee80211_iface_work); 1438 INIT_WORK(&sdata->recalc_smps, ieee80211_recalc_smps_work); 1439 INIT_WORK(&sdata->csa_finalize_work, ieee80211_csa_finalize_work); 1440 INIT_LIST_HEAD(&sdata->assigned_chanctx_list); 1441 INIT_LIST_HEAD(&sdata->reserved_chanctx_list); 1442 1443 switch (type) { 1444 case NL80211_IFTYPE_P2P_GO: 1445 type = NL80211_IFTYPE_AP; 1446 sdata->vif.type = type; 1447 sdata->vif.p2p = true; 1448 /* fall through */ 1449 case NL80211_IFTYPE_AP: 1450 skb_queue_head_init(&sdata->u.ap.ps.bc_buf); 1451 INIT_LIST_HEAD(&sdata->u.ap.vlans); 1452 INIT_WORK(&sdata->u.ap.request_smps_work, 1453 ieee80211_request_smps_ap_work); 1454 sdata->vif.bss_conf.bssid = sdata->vif.addr; 1455 sdata->u.ap.req_smps = IEEE80211_SMPS_OFF; 1456 break; 1457 case NL80211_IFTYPE_P2P_CLIENT: 1458 type = NL80211_IFTYPE_STATION; 1459 sdata->vif.type = type; 1460 sdata->vif.p2p = true; 1461 /* fall through */ 1462 case NL80211_IFTYPE_STATION: 1463 sdata->vif.bss_conf.bssid = sdata->u.mgd.bssid; 1464 ieee80211_sta_setup_sdata(sdata); 1465 break; 1466 case NL80211_IFTYPE_OCB: 1467 sdata->vif.bss_conf.bssid = bssid_wildcard; 1468 ieee80211_ocb_setup_sdata(sdata); 1469 break; 1470 case NL80211_IFTYPE_ADHOC: 1471 sdata->vif.bss_conf.bssid = sdata->u.ibss.bssid; 1472 ieee80211_ibss_setup_sdata(sdata); 1473 break; 1474 case NL80211_IFTYPE_MESH_POINT: 1475 if (ieee80211_vif_is_mesh(&sdata->vif)) 1476 ieee80211_mesh_init_sdata(sdata); 1477 break; 1478 case NL80211_IFTYPE_MONITOR: 1479 sdata->dev->type = ARPHRD_IEEE80211_RADIOTAP; 1480 sdata->dev->netdev_ops = &ieee80211_monitorif_ops; 1481 sdata->u.mntr.flags = MONITOR_FLAG_CONTROL | 1482 MONITOR_FLAG_OTHER_BSS; 1483 break; 1484 case NL80211_IFTYPE_WDS: 1485 sdata->vif.bss_conf.bssid = NULL; 1486 break; 1487 case NL80211_IFTYPE_NAN: 1488 idr_init(&sdata->u.nan.function_inst_ids); 1489 spin_lock_init(&sdata->u.nan.func_lock); 1490 sdata->vif.bss_conf.bssid = sdata->vif.addr; 1491 break; 1492 case NL80211_IFTYPE_AP_VLAN: 1493 case NL80211_IFTYPE_P2P_DEVICE: 1494 sdata->vif.bss_conf.bssid = sdata->vif.addr; 1495 break; 1496 case NL80211_IFTYPE_UNSPECIFIED: 1497 case NUM_NL80211_IFTYPES: 1498 BUG(); 1499 break; 1500 } 1501 1502 ieee80211_debugfs_add_netdev(sdata); 1503 } 1504 1505 static int ieee80211_runtime_change_iftype(struct ieee80211_sub_if_data *sdata, 1506 enum nl80211_iftype type) 1507 { 1508 struct ieee80211_local *local = sdata->local; 1509 int ret, err; 1510 enum nl80211_iftype internal_type = type; 1511 bool p2p = false; 1512 1513 ASSERT_RTNL(); 1514 1515 if (!local->ops->change_interface) 1516 return -EBUSY; 1517 1518 switch (sdata->vif.type) { 1519 case NL80211_IFTYPE_AP: 1520 case NL80211_IFTYPE_STATION: 1521 case NL80211_IFTYPE_ADHOC: 1522 case NL80211_IFTYPE_OCB: 1523 /* 1524 * Could maybe also all others here? 1525 * Just not sure how that interacts 1526 * with the RX/config path e.g. for 1527 * mesh. 1528 */ 1529 break; 1530 default: 1531 return -EBUSY; 1532 } 1533 1534 switch (type) { 1535 case NL80211_IFTYPE_AP: 1536 case NL80211_IFTYPE_STATION: 1537 case NL80211_IFTYPE_ADHOC: 1538 case NL80211_IFTYPE_OCB: 1539 /* 1540 * Could probably support everything 1541 * but WDS here (WDS do_open can fail 1542 * under memory pressure, which this 1543 * code isn't prepared to handle). 1544 */ 1545 break; 1546 case NL80211_IFTYPE_P2P_CLIENT: 1547 p2p = true; 1548 internal_type = NL80211_IFTYPE_STATION; 1549 break; 1550 case NL80211_IFTYPE_P2P_GO: 1551 p2p = true; 1552 internal_type = NL80211_IFTYPE_AP; 1553 break; 1554 default: 1555 return -EBUSY; 1556 } 1557 1558 ret = ieee80211_check_concurrent_iface(sdata, internal_type); 1559 if (ret) 1560 return ret; 1561 1562 ieee80211_do_stop(sdata, false); 1563 1564 ieee80211_teardown_sdata(sdata); 1565 1566 ret = drv_change_interface(local, sdata, internal_type, p2p); 1567 if (ret) 1568 type = ieee80211_vif_type_p2p(&sdata->vif); 1569 1570 /* 1571 * Ignore return value here, there's not much we can do since 1572 * the driver changed the interface type internally already. 1573 * The warnings will hopefully make driver authors fix it :-) 1574 */ 1575 ieee80211_check_queues(sdata, type); 1576 1577 ieee80211_setup_sdata(sdata, type); 1578 1579 err = ieee80211_do_open(&sdata->wdev, false); 1580 WARN(err, "type change: do_open returned %d", err); 1581 1582 return ret; 1583 } 1584 1585 int ieee80211_if_change_type(struct ieee80211_sub_if_data *sdata, 1586 enum nl80211_iftype type) 1587 { 1588 int ret; 1589 1590 ASSERT_RTNL(); 1591 1592 if (type == ieee80211_vif_type_p2p(&sdata->vif)) 1593 return 0; 1594 1595 if (ieee80211_sdata_running(sdata)) { 1596 ret = ieee80211_runtime_change_iftype(sdata, type); 1597 if (ret) 1598 return ret; 1599 } else { 1600 /* Purge and reset type-dependent state. */ 1601 ieee80211_teardown_sdata(sdata); 1602 ieee80211_setup_sdata(sdata, type); 1603 } 1604 1605 /* reset some values that shouldn't be kept across type changes */ 1606 if (type == NL80211_IFTYPE_STATION) 1607 sdata->u.mgd.use_4addr = false; 1608 1609 return 0; 1610 } 1611 1612 static void ieee80211_assign_perm_addr(struct ieee80211_local *local, 1613 u8 *perm_addr, enum nl80211_iftype type) 1614 { 1615 struct ieee80211_sub_if_data *sdata; 1616 u64 mask, start, addr, val, inc; 1617 u8 *m; 1618 u8 tmp_addr[ETH_ALEN]; 1619 int i; 1620 1621 /* default ... something at least */ 1622 memcpy(perm_addr, local->hw.wiphy->perm_addr, ETH_ALEN); 1623 1624 if (is_zero_ether_addr(local->hw.wiphy->addr_mask) && 1625 local->hw.wiphy->n_addresses <= 1) 1626 return; 1627 1628 mutex_lock(&local->iflist_mtx); 1629 1630 switch (type) { 1631 case NL80211_IFTYPE_MONITOR: 1632 /* doesn't matter */ 1633 break; 1634 case NL80211_IFTYPE_WDS: 1635 case NL80211_IFTYPE_AP_VLAN: 1636 /* match up with an AP interface */ 1637 list_for_each_entry(sdata, &local->interfaces, list) { 1638 if (sdata->vif.type != NL80211_IFTYPE_AP) 1639 continue; 1640 memcpy(perm_addr, sdata->vif.addr, ETH_ALEN); 1641 break; 1642 } 1643 /* keep default if no AP interface present */ 1644 break; 1645 case NL80211_IFTYPE_P2P_CLIENT: 1646 case NL80211_IFTYPE_P2P_GO: 1647 if (ieee80211_hw_check(&local->hw, P2P_DEV_ADDR_FOR_INTF)) { 1648 list_for_each_entry(sdata, &local->interfaces, list) { 1649 if (sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE) 1650 continue; 1651 if (!ieee80211_sdata_running(sdata)) 1652 continue; 1653 memcpy(perm_addr, sdata->vif.addr, ETH_ALEN); 1654 goto out_unlock; 1655 } 1656 } 1657 /* otherwise fall through */ 1658 default: 1659 /* assign a new address if possible -- try n_addresses first */ 1660 for (i = 0; i < local->hw.wiphy->n_addresses; i++) { 1661 bool used = false; 1662 1663 list_for_each_entry(sdata, &local->interfaces, list) { 1664 if (ether_addr_equal(local->hw.wiphy->addresses[i].addr, 1665 sdata->vif.addr)) { 1666 used = true; 1667 break; 1668 } 1669 } 1670 1671 if (!used) { 1672 memcpy(perm_addr, 1673 local->hw.wiphy->addresses[i].addr, 1674 ETH_ALEN); 1675 break; 1676 } 1677 } 1678 1679 /* try mask if available */ 1680 if (is_zero_ether_addr(local->hw.wiphy->addr_mask)) 1681 break; 1682 1683 m = local->hw.wiphy->addr_mask; 1684 mask = ((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 if (__ffs64(mask) + hweight64(mask) != fls64(mask)) { 1689 /* not a contiguous mask ... not handled now! */ 1690 pr_info("not contiguous\n"); 1691 break; 1692 } 1693 1694 /* 1695 * Pick address of existing interface in case user changed 1696 * MAC address manually, default to perm_addr. 1697 */ 1698 m = local->hw.wiphy->perm_addr; 1699 list_for_each_entry(sdata, &local->interfaces, list) { 1700 if (sdata->vif.type == NL80211_IFTYPE_MONITOR) 1701 continue; 1702 m = sdata->vif.addr; 1703 break; 1704 } 1705 start = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) | 1706 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) | 1707 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8); 1708 1709 inc = 1ULL<<__ffs64(mask); 1710 val = (start & mask); 1711 addr = (start & ~mask) | (val & mask); 1712 do { 1713 bool used = false; 1714 1715 tmp_addr[5] = addr >> 0*8; 1716 tmp_addr[4] = addr >> 1*8; 1717 tmp_addr[3] = addr >> 2*8; 1718 tmp_addr[2] = addr >> 3*8; 1719 tmp_addr[1] = addr >> 4*8; 1720 tmp_addr[0] = addr >> 5*8; 1721 1722 val += inc; 1723 1724 list_for_each_entry(sdata, &local->interfaces, list) { 1725 if (ether_addr_equal(tmp_addr, sdata->vif.addr)) { 1726 used = true; 1727 break; 1728 } 1729 } 1730 1731 if (!used) { 1732 memcpy(perm_addr, tmp_addr, ETH_ALEN); 1733 break; 1734 } 1735 addr = (start & ~mask) | (val & mask); 1736 } while (addr != start); 1737 1738 break; 1739 } 1740 1741 out_unlock: 1742 mutex_unlock(&local->iflist_mtx); 1743 } 1744 1745 int ieee80211_if_add(struct ieee80211_local *local, const char *name, 1746 unsigned char name_assign_type, 1747 struct wireless_dev **new_wdev, enum nl80211_iftype type, 1748 struct vif_params *params) 1749 { 1750 struct net_device *ndev = NULL; 1751 struct ieee80211_sub_if_data *sdata = NULL; 1752 struct txq_info *txqi; 1753 void (*if_setup)(struct net_device *dev); 1754 int ret, i; 1755 int txqs = 1; 1756 1757 ASSERT_RTNL(); 1758 1759 if (type == NL80211_IFTYPE_P2P_DEVICE || type == NL80211_IFTYPE_NAN) { 1760 struct wireless_dev *wdev; 1761 1762 sdata = kzalloc(sizeof(*sdata) + local->hw.vif_data_size, 1763 GFP_KERNEL); 1764 if (!sdata) 1765 return -ENOMEM; 1766 wdev = &sdata->wdev; 1767 1768 sdata->dev = NULL; 1769 strlcpy(sdata->name, name, IFNAMSIZ); 1770 ieee80211_assign_perm_addr(local, wdev->address, type); 1771 memcpy(sdata->vif.addr, wdev->address, ETH_ALEN); 1772 } else { 1773 int size = ALIGN(sizeof(*sdata) + local->hw.vif_data_size, 1774 sizeof(void *)); 1775 int txq_size = 0; 1776 1777 if (local->ops->wake_tx_queue) 1778 txq_size += sizeof(struct txq_info) + 1779 local->hw.txq_data_size; 1780 1781 if (local->ops->wake_tx_queue) 1782 if_setup = ieee80211_if_setup_no_queue; 1783 else 1784 if_setup = ieee80211_if_setup; 1785 1786 if (local->hw.queues >= IEEE80211_NUM_ACS) 1787 txqs = IEEE80211_NUM_ACS; 1788 1789 ndev = alloc_netdev_mqs(size + txq_size, 1790 name, name_assign_type, 1791 if_setup, txqs, 1); 1792 if (!ndev) 1793 return -ENOMEM; 1794 dev_net_set(ndev, wiphy_net(local->hw.wiphy)); 1795 1796 ndev->tstats = netdev_alloc_pcpu_stats(struct pcpu_sw_netstats); 1797 if (!ndev->tstats) { 1798 free_netdev(ndev); 1799 return -ENOMEM; 1800 } 1801 1802 ndev->needed_headroom = local->tx_headroom + 1803 4*6 /* four MAC addresses */ 1804 + 2 + 2 + 2 + 2 /* ctl, dur, seq, qos */ 1805 + 6 /* mesh */ 1806 + 8 /* rfc1042/bridge tunnel */ 1807 - ETH_HLEN /* ethernet hard_header_len */ 1808 + IEEE80211_ENCRYPT_HEADROOM; 1809 ndev->needed_tailroom = IEEE80211_ENCRYPT_TAILROOM; 1810 1811 ret = dev_alloc_name(ndev, ndev->name); 1812 if (ret < 0) { 1813 ieee80211_if_free(ndev); 1814 return ret; 1815 } 1816 1817 ieee80211_assign_perm_addr(local, ndev->perm_addr, type); 1818 if (params && is_valid_ether_addr(params->macaddr)) 1819 memcpy(ndev->dev_addr, params->macaddr, ETH_ALEN); 1820 else 1821 memcpy(ndev->dev_addr, ndev->perm_addr, ETH_ALEN); 1822 SET_NETDEV_DEV(ndev, wiphy_dev(local->hw.wiphy)); 1823 1824 /* don't use IEEE80211_DEV_TO_SUB_IF -- it checks too much */ 1825 sdata = netdev_priv(ndev); 1826 ndev->ieee80211_ptr = &sdata->wdev; 1827 memcpy(sdata->vif.addr, ndev->dev_addr, ETH_ALEN); 1828 memcpy(sdata->name, ndev->name, IFNAMSIZ); 1829 1830 if (txq_size) { 1831 txqi = netdev_priv(ndev) + size; 1832 ieee80211_txq_init(sdata, NULL, txqi, 0); 1833 } 1834 1835 sdata->dev = ndev; 1836 } 1837 1838 /* initialise type-independent data */ 1839 sdata->wdev.wiphy = local->hw.wiphy; 1840 sdata->local = local; 1841 1842 for (i = 0; i < IEEE80211_FRAGMENT_MAX; i++) 1843 skb_queue_head_init(&sdata->fragments[i].skb_list); 1844 1845 INIT_LIST_HEAD(&sdata->key_list); 1846 1847 INIT_DELAYED_WORK(&sdata->dfs_cac_timer_work, 1848 ieee80211_dfs_cac_timer_work); 1849 INIT_DELAYED_WORK(&sdata->dec_tailroom_needed_wk, 1850 ieee80211_delayed_tailroom_dec); 1851 1852 for (i = 0; i < NUM_NL80211_BANDS; i++) { 1853 struct ieee80211_supported_band *sband; 1854 sband = local->hw.wiphy->bands[i]; 1855 sdata->rc_rateidx_mask[i] = 1856 sband ? (1 << sband->n_bitrates) - 1 : 0; 1857 if (sband) { 1858 __le16 cap; 1859 u16 *vht_rate_mask; 1860 1861 memcpy(sdata->rc_rateidx_mcs_mask[i], 1862 sband->ht_cap.mcs.rx_mask, 1863 sizeof(sdata->rc_rateidx_mcs_mask[i])); 1864 1865 cap = sband->vht_cap.vht_mcs.rx_mcs_map; 1866 vht_rate_mask = sdata->rc_rateidx_vht_mcs_mask[i]; 1867 ieee80211_get_vht_mask_from_cap(cap, vht_rate_mask); 1868 } else { 1869 memset(sdata->rc_rateidx_mcs_mask[i], 0, 1870 sizeof(sdata->rc_rateidx_mcs_mask[i])); 1871 memset(sdata->rc_rateidx_vht_mcs_mask[i], 0, 1872 sizeof(sdata->rc_rateidx_vht_mcs_mask[i])); 1873 } 1874 } 1875 1876 ieee80211_set_default_queues(sdata); 1877 1878 sdata->ap_power_level = IEEE80211_UNSET_POWER_LEVEL; 1879 sdata->user_power_level = local->user_power_level; 1880 1881 sdata->encrypt_headroom = IEEE80211_ENCRYPT_HEADROOM; 1882 1883 /* setup type-dependent data */ 1884 ieee80211_setup_sdata(sdata, type); 1885 1886 if (ndev) { 1887 if (params) { 1888 ndev->ieee80211_ptr->use_4addr = params->use_4addr; 1889 if (type == NL80211_IFTYPE_STATION) 1890 sdata->u.mgd.use_4addr = params->use_4addr; 1891 } 1892 1893 ndev->features |= local->hw.netdev_features; 1894 1895 netdev_set_default_ethtool_ops(ndev, &ieee80211_ethtool_ops); 1896 1897 /* MTU range: 256 - 2304 */ 1898 ndev->min_mtu = 256; 1899 ndev->max_mtu = IEEE80211_MAX_DATA_LEN; 1900 1901 ret = register_netdevice(ndev); 1902 if (ret) { 1903 ieee80211_if_free(ndev); 1904 return ret; 1905 } 1906 } 1907 1908 mutex_lock(&local->iflist_mtx); 1909 list_add_tail_rcu(&sdata->list, &local->interfaces); 1910 mutex_unlock(&local->iflist_mtx); 1911 1912 if (new_wdev) 1913 *new_wdev = &sdata->wdev; 1914 1915 return 0; 1916 } 1917 1918 void ieee80211_if_remove(struct ieee80211_sub_if_data *sdata) 1919 { 1920 ASSERT_RTNL(); 1921 1922 mutex_lock(&sdata->local->iflist_mtx); 1923 list_del_rcu(&sdata->list); 1924 mutex_unlock(&sdata->local->iflist_mtx); 1925 1926 synchronize_rcu(); 1927 1928 if (sdata->dev) { 1929 unregister_netdevice(sdata->dev); 1930 } else { 1931 cfg80211_unregister_wdev(&sdata->wdev); 1932 ieee80211_teardown_sdata(sdata); 1933 kfree(sdata); 1934 } 1935 } 1936 1937 void ieee80211_sdata_stop(struct ieee80211_sub_if_data *sdata) 1938 { 1939 if (WARN_ON_ONCE(!test_bit(SDATA_STATE_RUNNING, &sdata->state))) 1940 return; 1941 ieee80211_do_stop(sdata, true); 1942 } 1943 1944 void ieee80211_remove_interfaces(struct ieee80211_local *local) 1945 { 1946 struct ieee80211_sub_if_data *sdata, *tmp; 1947 LIST_HEAD(unreg_list); 1948 LIST_HEAD(wdev_list); 1949 1950 ASSERT_RTNL(); 1951 1952 /* Before destroying the interfaces, make sure they're all stopped so 1953 * that the hardware is stopped. Otherwise, the driver might still be 1954 * iterating the interfaces during the shutdown, e.g. from a worker 1955 * or from RX processing or similar, and if it does so (using atomic 1956 * iteration) while we're manipulating the list, the iteration will 1957 * crash. 1958 * 1959 * After this, the hardware should be stopped and the driver should 1960 * have stopped all of its activities, so that we can do RCU-unaware 1961 * manipulations of the interface list below. 1962 */ 1963 cfg80211_shutdown_all_interfaces(local->hw.wiphy); 1964 1965 WARN(local->open_count, "%s: open count remains %d\n", 1966 wiphy_name(local->hw.wiphy), local->open_count); 1967 1968 mutex_lock(&local->iflist_mtx); 1969 list_for_each_entry_safe(sdata, tmp, &local->interfaces, list) { 1970 list_del(&sdata->list); 1971 1972 if (sdata->dev) 1973 unregister_netdevice_queue(sdata->dev, &unreg_list); 1974 else 1975 list_add(&sdata->list, &wdev_list); 1976 } 1977 mutex_unlock(&local->iflist_mtx); 1978 unregister_netdevice_many(&unreg_list); 1979 1980 list_for_each_entry_safe(sdata, tmp, &wdev_list, list) { 1981 list_del(&sdata->list); 1982 cfg80211_unregister_wdev(&sdata->wdev); 1983 kfree(sdata); 1984 } 1985 } 1986 1987 static int netdev_notify(struct notifier_block *nb, 1988 unsigned long state, void *ptr) 1989 { 1990 struct net_device *dev = netdev_notifier_info_to_dev(ptr); 1991 struct ieee80211_sub_if_data *sdata; 1992 1993 if (state != NETDEV_CHANGENAME) 1994 return NOTIFY_DONE; 1995 1996 if (!dev->ieee80211_ptr || !dev->ieee80211_ptr->wiphy) 1997 return NOTIFY_DONE; 1998 1999 if (dev->ieee80211_ptr->wiphy->privid != mac80211_wiphy_privid) 2000 return NOTIFY_DONE; 2001 2002 sdata = IEEE80211_DEV_TO_SUB_IF(dev); 2003 memcpy(sdata->name, dev->name, IFNAMSIZ); 2004 ieee80211_debugfs_rename_netdev(sdata); 2005 2006 return NOTIFY_OK; 2007 } 2008 2009 static struct notifier_block mac80211_netdev_notifier = { 2010 .notifier_call = netdev_notify, 2011 }; 2012 2013 int ieee80211_iface_init(void) 2014 { 2015 return register_netdevice_notifier(&mac80211_netdev_notifier); 2016 } 2017 2018 void ieee80211_iface_exit(void) 2019 { 2020 unregister_netdevice_notifier(&mac80211_netdev_notifier); 2021 } 2022 2023 void ieee80211_vif_inc_num_mcast(struct ieee80211_sub_if_data *sdata) 2024 { 2025 if (sdata->vif.type == NL80211_IFTYPE_AP) 2026 atomic_inc(&sdata->u.ap.num_mcast_sta); 2027 else if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) 2028 atomic_inc(&sdata->u.vlan.num_mcast_sta); 2029 } 2030 2031 void ieee80211_vif_dec_num_mcast(struct ieee80211_sub_if_data *sdata) 2032 { 2033 if (sdata->vif.type == NL80211_IFTYPE_AP) 2034 atomic_dec(&sdata->u.ap.num_mcast_sta); 2035 else if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) 2036 atomic_dec(&sdata->u.vlan.num_mcast_sta); 2037 } 2038