1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * Interface handling 4 * 5 * Copyright 2002-2005, Instant802 Networks, Inc. 6 * Copyright 2005-2006, Devicescape Software, Inc. 7 * Copyright (c) 2006 Jiri Benc <jbenc@suse.cz> 8 * Copyright 2008, Johannes Berg <johannes@sipsolutions.net> 9 * Copyright 2013-2014 Intel Mobile Communications GmbH 10 * Copyright (c) 2016 Intel Deutschland GmbH 11 * Copyright (C) 2018-2020 Intel Corporation 12 */ 13 #include <linux/slab.h> 14 #include <linux/kernel.h> 15 #include <linux/if_arp.h> 16 #include <linux/netdevice.h> 17 #include <linux/rtnetlink.h> 18 #include <net/mac80211.h> 19 #include <net/ieee80211_radiotap.h> 20 #include "ieee80211_i.h" 21 #include "sta_info.h" 22 #include "debugfs_netdev.h" 23 #include "mesh.h" 24 #include "led.h" 25 #include "driver-ops.h" 26 #include "wme.h" 27 #include "rate.h" 28 29 /** 30 * DOC: Interface list locking 31 * 32 * The interface list in each struct ieee80211_local is protected 33 * three-fold: 34 * 35 * (1) modifications may only be done under the RTNL 36 * (2) modifications and readers are protected against each other by 37 * the iflist_mtx. 38 * (3) modifications are done in an RCU manner so atomic readers 39 * can traverse the list in RCU-safe blocks. 40 * 41 * As a consequence, reads (traversals) of the list can be protected 42 * by either the RTNL, the iflist_mtx or RCU. 43 */ 44 45 static void ieee80211_iface_work(struct work_struct *work); 46 47 bool __ieee80211_recalc_txpower(struct ieee80211_sub_if_data *sdata) 48 { 49 struct ieee80211_chanctx_conf *chanctx_conf; 50 int power; 51 52 rcu_read_lock(); 53 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf); 54 if (!chanctx_conf) { 55 rcu_read_unlock(); 56 return false; 57 } 58 59 power = ieee80211_chandef_max_power(&chanctx_conf->def); 60 rcu_read_unlock(); 61 62 if (sdata->user_power_level != IEEE80211_UNSET_POWER_LEVEL) 63 power = min(power, sdata->user_power_level); 64 65 if (sdata->ap_power_level != IEEE80211_UNSET_POWER_LEVEL) 66 power = min(power, sdata->ap_power_level); 67 68 if (power != sdata->vif.bss_conf.txpower) { 69 sdata->vif.bss_conf.txpower = power; 70 ieee80211_hw_config(sdata->local, 0); 71 return true; 72 } 73 74 return false; 75 } 76 77 void ieee80211_recalc_txpower(struct ieee80211_sub_if_data *sdata, 78 bool update_bss) 79 { 80 if (__ieee80211_recalc_txpower(sdata) || 81 (update_bss && ieee80211_sdata_running(sdata))) 82 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_TXPOWER); 83 } 84 85 static u32 __ieee80211_idle_off(struct ieee80211_local *local) 86 { 87 if (!(local->hw.conf.flags & IEEE80211_CONF_IDLE)) 88 return 0; 89 90 local->hw.conf.flags &= ~IEEE80211_CONF_IDLE; 91 return IEEE80211_CONF_CHANGE_IDLE; 92 } 93 94 static u32 __ieee80211_idle_on(struct ieee80211_local *local) 95 { 96 if (local->hw.conf.flags & IEEE80211_CONF_IDLE) 97 return 0; 98 99 ieee80211_flush_queues(local, NULL, false); 100 101 local->hw.conf.flags |= IEEE80211_CONF_IDLE; 102 return IEEE80211_CONF_CHANGE_IDLE; 103 } 104 105 static u32 __ieee80211_recalc_idle(struct ieee80211_local *local, 106 bool force_active) 107 { 108 bool working, scanning, active; 109 unsigned int led_trig_start = 0, led_trig_stop = 0; 110 111 lockdep_assert_held(&local->mtx); 112 113 active = force_active || 114 !list_empty(&local->chanctx_list) || 115 local->monitors; 116 117 working = !local->ops->remain_on_channel && 118 !list_empty(&local->roc_list); 119 120 scanning = test_bit(SCAN_SW_SCANNING, &local->scanning) || 121 test_bit(SCAN_ONCHANNEL_SCANNING, &local->scanning); 122 123 if (working || scanning) 124 led_trig_start |= IEEE80211_TPT_LEDTRIG_FL_WORK; 125 else 126 led_trig_stop |= IEEE80211_TPT_LEDTRIG_FL_WORK; 127 128 if (active) 129 led_trig_start |= IEEE80211_TPT_LEDTRIG_FL_CONNECTED; 130 else 131 led_trig_stop |= IEEE80211_TPT_LEDTRIG_FL_CONNECTED; 132 133 ieee80211_mod_tpt_led_trig(local, led_trig_start, led_trig_stop); 134 135 if (working || scanning || active) 136 return __ieee80211_idle_off(local); 137 return __ieee80211_idle_on(local); 138 } 139 140 u32 ieee80211_idle_off(struct ieee80211_local *local) 141 { 142 return __ieee80211_recalc_idle(local, true); 143 } 144 145 void ieee80211_recalc_idle(struct ieee80211_local *local) 146 { 147 u32 change = __ieee80211_recalc_idle(local, false); 148 if (change) 149 ieee80211_hw_config(local, change); 150 } 151 152 static int ieee80211_verify_mac(struct ieee80211_sub_if_data *sdata, u8 *addr, 153 bool check_dup) 154 { 155 struct ieee80211_local *local = sdata->local; 156 struct ieee80211_sub_if_data *iter; 157 u64 new, mask, tmp; 158 u8 *m; 159 int ret = 0; 160 161 if (is_zero_ether_addr(local->hw.wiphy->addr_mask)) 162 return 0; 163 164 m = addr; 165 new = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) | 166 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) | 167 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8); 168 169 m = local->hw.wiphy->addr_mask; 170 mask = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) | 171 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) | 172 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8); 173 174 if (!check_dup) 175 return ret; 176 177 mutex_lock(&local->iflist_mtx); 178 list_for_each_entry(iter, &local->interfaces, list) { 179 if (iter == sdata) 180 continue; 181 182 if (iter->vif.type == NL80211_IFTYPE_MONITOR && 183 !(iter->u.mntr.flags & MONITOR_FLAG_ACTIVE)) 184 continue; 185 186 m = iter->vif.addr; 187 tmp = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) | 188 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) | 189 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8); 190 191 if ((new & ~mask) != (tmp & ~mask)) { 192 ret = -EINVAL; 193 break; 194 } 195 } 196 mutex_unlock(&local->iflist_mtx); 197 198 return ret; 199 } 200 201 static int ieee80211_change_mac(struct net_device *dev, void *addr) 202 { 203 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); 204 struct sockaddr *sa = addr; 205 bool check_dup = true; 206 int ret; 207 208 if (ieee80211_sdata_running(sdata)) 209 return -EBUSY; 210 211 if (sdata->vif.type == NL80211_IFTYPE_MONITOR && 212 !(sdata->u.mntr.flags & MONITOR_FLAG_ACTIVE)) 213 check_dup = false; 214 215 ret = ieee80211_verify_mac(sdata, sa->sa_data, check_dup); 216 if (ret) 217 return ret; 218 219 ret = eth_mac_addr(dev, sa); 220 221 if (ret == 0) 222 memcpy(sdata->vif.addr, sa->sa_data, ETH_ALEN); 223 224 return ret; 225 } 226 227 static inline int identical_mac_addr_allowed(int type1, int type2) 228 { 229 return type1 == NL80211_IFTYPE_MONITOR || 230 type2 == NL80211_IFTYPE_MONITOR || 231 type1 == NL80211_IFTYPE_P2P_DEVICE || 232 type2 == NL80211_IFTYPE_P2P_DEVICE || 233 (type1 == NL80211_IFTYPE_AP && type2 == NL80211_IFTYPE_WDS) || 234 (type1 == NL80211_IFTYPE_WDS && 235 (type2 == NL80211_IFTYPE_WDS || 236 type2 == NL80211_IFTYPE_AP)) || 237 (type1 == NL80211_IFTYPE_AP && type2 == NL80211_IFTYPE_AP_VLAN) || 238 (type1 == NL80211_IFTYPE_AP_VLAN && 239 (type2 == NL80211_IFTYPE_AP || 240 type2 == NL80211_IFTYPE_AP_VLAN)); 241 } 242 243 static int ieee80211_check_concurrent_iface(struct ieee80211_sub_if_data *sdata, 244 enum nl80211_iftype iftype) 245 { 246 struct ieee80211_local *local = sdata->local; 247 struct ieee80211_sub_if_data *nsdata; 248 int ret; 249 250 ASSERT_RTNL(); 251 252 /* we hold the RTNL here so can safely walk the list */ 253 list_for_each_entry(nsdata, &local->interfaces, list) { 254 if (nsdata != sdata && ieee80211_sdata_running(nsdata)) { 255 /* 256 * Only OCB and monitor mode may coexist 257 */ 258 if ((sdata->vif.type == NL80211_IFTYPE_OCB && 259 nsdata->vif.type != NL80211_IFTYPE_MONITOR) || 260 (sdata->vif.type != NL80211_IFTYPE_MONITOR && 261 nsdata->vif.type == NL80211_IFTYPE_OCB)) 262 return -EBUSY; 263 264 /* 265 * Allow only a single IBSS interface to be up at any 266 * time. This is restricted because beacon distribution 267 * cannot work properly if both are in the same IBSS. 268 * 269 * To remove this restriction we'd have to disallow them 270 * from setting the same SSID on different IBSS interfaces 271 * belonging to the same hardware. Then, however, we're 272 * faced with having to adopt two different TSF timers... 273 */ 274 if (iftype == NL80211_IFTYPE_ADHOC && 275 nsdata->vif.type == NL80211_IFTYPE_ADHOC) 276 return -EBUSY; 277 /* 278 * will not add another interface while any channel 279 * switch is active. 280 */ 281 if (nsdata->vif.csa_active) 282 return -EBUSY; 283 284 /* 285 * The remaining checks are only performed for interfaces 286 * with the same MAC address. 287 */ 288 if (!ether_addr_equal(sdata->vif.addr, 289 nsdata->vif.addr)) 290 continue; 291 292 /* 293 * check whether it may have the same address 294 */ 295 if (!identical_mac_addr_allowed(iftype, 296 nsdata->vif.type)) 297 return -ENOTUNIQ; 298 299 /* 300 * can only add VLANs to enabled APs 301 */ 302 if (iftype == NL80211_IFTYPE_AP_VLAN && 303 nsdata->vif.type == NL80211_IFTYPE_AP) 304 sdata->bss = &nsdata->u.ap; 305 } 306 } 307 308 mutex_lock(&local->chanctx_mtx); 309 ret = ieee80211_check_combinations(sdata, NULL, 0, 0); 310 mutex_unlock(&local->chanctx_mtx); 311 return ret; 312 } 313 314 static int ieee80211_check_queues(struct ieee80211_sub_if_data *sdata, 315 enum nl80211_iftype iftype) 316 { 317 int n_queues = sdata->local->hw.queues; 318 int i; 319 320 if (iftype == NL80211_IFTYPE_NAN) 321 return 0; 322 323 if (iftype != NL80211_IFTYPE_P2P_DEVICE) { 324 for (i = 0; i < IEEE80211_NUM_ACS; i++) { 325 if (WARN_ON_ONCE(sdata->vif.hw_queue[i] == 326 IEEE80211_INVAL_HW_QUEUE)) 327 return -EINVAL; 328 if (WARN_ON_ONCE(sdata->vif.hw_queue[i] >= 329 n_queues)) 330 return -EINVAL; 331 } 332 } 333 334 if ((iftype != NL80211_IFTYPE_AP && 335 iftype != NL80211_IFTYPE_P2P_GO && 336 iftype != NL80211_IFTYPE_MESH_POINT) || 337 !ieee80211_hw_check(&sdata->local->hw, QUEUE_CONTROL)) { 338 sdata->vif.cab_queue = IEEE80211_INVAL_HW_QUEUE; 339 return 0; 340 } 341 342 if (WARN_ON_ONCE(sdata->vif.cab_queue == IEEE80211_INVAL_HW_QUEUE)) 343 return -EINVAL; 344 345 if (WARN_ON_ONCE(sdata->vif.cab_queue >= n_queues)) 346 return -EINVAL; 347 348 return 0; 349 } 350 351 void ieee80211_adjust_monitor_flags(struct ieee80211_sub_if_data *sdata, 352 const int offset) 353 { 354 struct ieee80211_local *local = sdata->local; 355 u32 flags = sdata->u.mntr.flags; 356 357 #define ADJUST(_f, _s) do { \ 358 if (flags & MONITOR_FLAG_##_f) \ 359 local->fif_##_s += offset; \ 360 } while (0) 361 362 ADJUST(FCSFAIL, fcsfail); 363 ADJUST(PLCPFAIL, plcpfail); 364 ADJUST(CONTROL, control); 365 ADJUST(CONTROL, pspoll); 366 ADJUST(OTHER_BSS, other_bss); 367 368 #undef ADJUST 369 } 370 371 static void ieee80211_set_default_queues(struct ieee80211_sub_if_data *sdata) 372 { 373 struct ieee80211_local *local = sdata->local; 374 int i; 375 376 for (i = 0; i < IEEE80211_NUM_ACS; i++) { 377 if (ieee80211_hw_check(&local->hw, QUEUE_CONTROL)) 378 sdata->vif.hw_queue[i] = IEEE80211_INVAL_HW_QUEUE; 379 else if (local->hw.queues >= IEEE80211_NUM_ACS) 380 sdata->vif.hw_queue[i] = i; 381 else 382 sdata->vif.hw_queue[i] = 0; 383 } 384 sdata->vif.cab_queue = IEEE80211_INVAL_HW_QUEUE; 385 } 386 387 int ieee80211_add_virtual_monitor(struct ieee80211_local *local) 388 { 389 struct ieee80211_sub_if_data *sdata; 390 int ret; 391 392 if (!ieee80211_hw_check(&local->hw, WANT_MONITOR_VIF)) 393 return 0; 394 395 ASSERT_RTNL(); 396 397 if (local->monitor_sdata) 398 return 0; 399 400 sdata = kzalloc(sizeof(*sdata) + local->hw.vif_data_size, GFP_KERNEL); 401 if (!sdata) 402 return -ENOMEM; 403 404 /* set up data */ 405 sdata->local = local; 406 sdata->vif.type = NL80211_IFTYPE_MONITOR; 407 snprintf(sdata->name, IFNAMSIZ, "%s-monitor", 408 wiphy_name(local->hw.wiphy)); 409 sdata->wdev.iftype = NL80211_IFTYPE_MONITOR; 410 411 sdata->encrypt_headroom = IEEE80211_ENCRYPT_HEADROOM; 412 413 ieee80211_set_default_queues(sdata); 414 415 ret = drv_add_interface(local, sdata); 416 if (WARN_ON(ret)) { 417 /* ok .. stupid driver, it asked for this! */ 418 kfree(sdata); 419 return ret; 420 } 421 422 ret = ieee80211_check_queues(sdata, NL80211_IFTYPE_MONITOR); 423 if (ret) { 424 kfree(sdata); 425 return ret; 426 } 427 428 mutex_lock(&local->iflist_mtx); 429 rcu_assign_pointer(local->monitor_sdata, sdata); 430 mutex_unlock(&local->iflist_mtx); 431 432 mutex_lock(&local->mtx); 433 ret = ieee80211_vif_use_channel(sdata, &local->monitor_chandef, 434 IEEE80211_CHANCTX_EXCLUSIVE); 435 mutex_unlock(&local->mtx); 436 if (ret) { 437 mutex_lock(&local->iflist_mtx); 438 RCU_INIT_POINTER(local->monitor_sdata, NULL); 439 mutex_unlock(&local->iflist_mtx); 440 synchronize_net(); 441 drv_remove_interface(local, sdata); 442 kfree(sdata); 443 return ret; 444 } 445 446 skb_queue_head_init(&sdata->skb_queue); 447 INIT_WORK(&sdata->work, ieee80211_iface_work); 448 449 return 0; 450 } 451 452 void ieee80211_del_virtual_monitor(struct ieee80211_local *local) 453 { 454 struct ieee80211_sub_if_data *sdata; 455 456 if (!ieee80211_hw_check(&local->hw, WANT_MONITOR_VIF)) 457 return; 458 459 ASSERT_RTNL(); 460 461 mutex_lock(&local->iflist_mtx); 462 463 sdata = rcu_dereference_protected(local->monitor_sdata, 464 lockdep_is_held(&local->iflist_mtx)); 465 if (!sdata) { 466 mutex_unlock(&local->iflist_mtx); 467 return; 468 } 469 470 RCU_INIT_POINTER(local->monitor_sdata, NULL); 471 mutex_unlock(&local->iflist_mtx); 472 473 synchronize_net(); 474 475 mutex_lock(&local->mtx); 476 ieee80211_vif_release_channel(sdata); 477 mutex_unlock(&local->mtx); 478 479 drv_remove_interface(local, sdata); 480 481 kfree(sdata); 482 } 483 484 /* 485 * NOTE: Be very careful when changing this function, it must NOT return 486 * an error on interface type changes that have been pre-checked, so most 487 * checks should be in ieee80211_check_concurrent_iface. 488 */ 489 int ieee80211_do_open(struct wireless_dev *wdev, bool coming_up) 490 { 491 struct ieee80211_sub_if_data *sdata = IEEE80211_WDEV_TO_SUB_IF(wdev); 492 struct net_device *dev = wdev->netdev; 493 struct ieee80211_local *local = sdata->local; 494 struct sta_info *sta; 495 u32 changed = 0; 496 int res; 497 u32 hw_reconf_flags = 0; 498 499 switch (sdata->vif.type) { 500 case NL80211_IFTYPE_WDS: 501 if (!is_valid_ether_addr(sdata->u.wds.remote_addr)) 502 return -ENOLINK; 503 break; 504 case NL80211_IFTYPE_AP_VLAN: { 505 struct ieee80211_sub_if_data *master; 506 507 if (!sdata->bss) 508 return -ENOLINK; 509 510 mutex_lock(&local->mtx); 511 list_add(&sdata->u.vlan.list, &sdata->bss->vlans); 512 mutex_unlock(&local->mtx); 513 514 master = container_of(sdata->bss, 515 struct ieee80211_sub_if_data, u.ap); 516 sdata->control_port_protocol = 517 master->control_port_protocol; 518 sdata->control_port_no_encrypt = 519 master->control_port_no_encrypt; 520 sdata->control_port_over_nl80211 = 521 master->control_port_over_nl80211; 522 sdata->vif.cab_queue = master->vif.cab_queue; 523 memcpy(sdata->vif.hw_queue, master->vif.hw_queue, 524 sizeof(sdata->vif.hw_queue)); 525 sdata->vif.bss_conf.chandef = master->vif.bss_conf.chandef; 526 527 mutex_lock(&local->key_mtx); 528 sdata->crypto_tx_tailroom_needed_cnt += 529 master->crypto_tx_tailroom_needed_cnt; 530 mutex_unlock(&local->key_mtx); 531 532 break; 533 } 534 case NL80211_IFTYPE_AP: 535 sdata->bss = &sdata->u.ap; 536 break; 537 case NL80211_IFTYPE_MESH_POINT: 538 case NL80211_IFTYPE_STATION: 539 case NL80211_IFTYPE_MONITOR: 540 case NL80211_IFTYPE_ADHOC: 541 case NL80211_IFTYPE_P2P_DEVICE: 542 case NL80211_IFTYPE_OCB: 543 case NL80211_IFTYPE_NAN: 544 /* no special treatment */ 545 break; 546 case NL80211_IFTYPE_UNSPECIFIED: 547 case NUM_NL80211_IFTYPES: 548 case NL80211_IFTYPE_P2P_CLIENT: 549 case NL80211_IFTYPE_P2P_GO: 550 /* cannot happen */ 551 WARN_ON(1); 552 break; 553 } 554 555 if (local->open_count == 0) { 556 res = drv_start(local); 557 if (res) 558 goto err_del_bss; 559 /* we're brought up, everything changes */ 560 hw_reconf_flags = ~0; 561 ieee80211_led_radio(local, true); 562 ieee80211_mod_tpt_led_trig(local, 563 IEEE80211_TPT_LEDTRIG_FL_RADIO, 0); 564 } 565 566 /* 567 * Copy the hopefully now-present MAC address to 568 * this interface, if it has the special null one. 569 */ 570 if (dev && is_zero_ether_addr(dev->dev_addr)) { 571 memcpy(dev->dev_addr, 572 local->hw.wiphy->perm_addr, 573 ETH_ALEN); 574 memcpy(dev->perm_addr, dev->dev_addr, ETH_ALEN); 575 576 if (!is_valid_ether_addr(dev->dev_addr)) { 577 res = -EADDRNOTAVAIL; 578 goto err_stop; 579 } 580 } 581 582 switch (sdata->vif.type) { 583 case NL80211_IFTYPE_AP_VLAN: 584 /* no need to tell driver, but set carrier and chanctx */ 585 if (rtnl_dereference(sdata->bss->beacon)) { 586 ieee80211_vif_vlan_copy_chanctx(sdata); 587 netif_carrier_on(dev); 588 } else { 589 netif_carrier_off(dev); 590 } 591 break; 592 case NL80211_IFTYPE_MONITOR: 593 if (sdata->u.mntr.flags & MONITOR_FLAG_COOK_FRAMES) { 594 local->cooked_mntrs++; 595 break; 596 } 597 598 if (sdata->u.mntr.flags & MONITOR_FLAG_ACTIVE) { 599 res = drv_add_interface(local, sdata); 600 if (res) 601 goto err_stop; 602 } else if (local->monitors == 0 && local->open_count == 0) { 603 res = ieee80211_add_virtual_monitor(local); 604 if (res) 605 goto err_stop; 606 } 607 608 /* must be before the call to ieee80211_configure_filter */ 609 local->monitors++; 610 if (local->monitors == 1) { 611 local->hw.conf.flags |= IEEE80211_CONF_MONITOR; 612 hw_reconf_flags |= IEEE80211_CONF_CHANGE_MONITOR; 613 } 614 615 ieee80211_adjust_monitor_flags(sdata, 1); 616 ieee80211_configure_filter(local); 617 mutex_lock(&local->mtx); 618 ieee80211_recalc_idle(local); 619 mutex_unlock(&local->mtx); 620 621 netif_carrier_on(dev); 622 break; 623 default: 624 if (coming_up) { 625 ieee80211_del_virtual_monitor(local); 626 627 res = drv_add_interface(local, sdata); 628 if (res) 629 goto err_stop; 630 res = ieee80211_check_queues(sdata, 631 ieee80211_vif_type_p2p(&sdata->vif)); 632 if (res) 633 goto err_del_interface; 634 } 635 636 if (sdata->vif.type == NL80211_IFTYPE_AP) { 637 local->fif_pspoll++; 638 local->fif_probe_req++; 639 640 ieee80211_configure_filter(local); 641 } else if (sdata->vif.type == NL80211_IFTYPE_ADHOC) { 642 local->fif_probe_req++; 643 } 644 645 if (sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE && 646 sdata->vif.type != NL80211_IFTYPE_NAN) 647 changed |= ieee80211_reset_erp_info(sdata); 648 ieee80211_bss_info_change_notify(sdata, changed); 649 650 switch (sdata->vif.type) { 651 case NL80211_IFTYPE_STATION: 652 case NL80211_IFTYPE_ADHOC: 653 case NL80211_IFTYPE_AP: 654 case NL80211_IFTYPE_MESH_POINT: 655 case NL80211_IFTYPE_OCB: 656 netif_carrier_off(dev); 657 break; 658 case NL80211_IFTYPE_WDS: 659 case NL80211_IFTYPE_P2P_DEVICE: 660 case NL80211_IFTYPE_NAN: 661 break; 662 default: 663 /* not reached */ 664 WARN_ON(1); 665 } 666 667 /* 668 * Set default queue parameters so drivers don't 669 * need to initialise the hardware if the hardware 670 * doesn't start up with sane defaults. 671 * Enable QoS for anything but station interfaces. 672 */ 673 ieee80211_set_wmm_default(sdata, true, 674 sdata->vif.type != NL80211_IFTYPE_STATION); 675 } 676 677 set_bit(SDATA_STATE_RUNNING, &sdata->state); 678 679 switch (sdata->vif.type) { 680 case NL80211_IFTYPE_WDS: 681 /* Create STA entry for the WDS peer */ 682 sta = sta_info_alloc(sdata, sdata->u.wds.remote_addr, 683 GFP_KERNEL); 684 if (!sta) { 685 res = -ENOMEM; 686 goto err_del_interface; 687 } 688 689 sta_info_pre_move_state(sta, IEEE80211_STA_AUTH); 690 sta_info_pre_move_state(sta, IEEE80211_STA_ASSOC); 691 sta_info_pre_move_state(sta, IEEE80211_STA_AUTHORIZED); 692 693 res = sta_info_insert(sta); 694 if (res) { 695 /* STA has been freed */ 696 goto err_del_interface; 697 } 698 699 rate_control_rate_init(sta); 700 netif_carrier_on(dev); 701 break; 702 case NL80211_IFTYPE_P2P_DEVICE: 703 rcu_assign_pointer(local->p2p_sdata, sdata); 704 break; 705 case NL80211_IFTYPE_MONITOR: 706 if (sdata->u.mntr.flags & MONITOR_FLAG_COOK_FRAMES) 707 break; 708 list_add_tail_rcu(&sdata->u.mntr.list, &local->mon_list); 709 break; 710 default: 711 break; 712 } 713 714 /* 715 * set_multicast_list will be invoked by the networking core 716 * which will check whether any increments here were done in 717 * error and sync them down to the hardware as filter flags. 718 */ 719 if (sdata->flags & IEEE80211_SDATA_ALLMULTI) 720 atomic_inc(&local->iff_allmultis); 721 722 if (coming_up) 723 local->open_count++; 724 725 if (hw_reconf_flags) 726 ieee80211_hw_config(local, hw_reconf_flags); 727 728 ieee80211_recalc_ps(local); 729 730 if (sdata->vif.type == NL80211_IFTYPE_MONITOR || 731 sdata->vif.type == NL80211_IFTYPE_AP_VLAN || 732 local->ops->wake_tx_queue) { 733 /* XXX: for AP_VLAN, actually track AP queues */ 734 if (dev) 735 netif_tx_start_all_queues(dev); 736 } else if (dev) { 737 unsigned long flags; 738 int n_acs = IEEE80211_NUM_ACS; 739 int ac; 740 741 if (local->hw.queues < IEEE80211_NUM_ACS) 742 n_acs = 1; 743 744 spin_lock_irqsave(&local->queue_stop_reason_lock, flags); 745 if (sdata->vif.cab_queue == IEEE80211_INVAL_HW_QUEUE || 746 (local->queue_stop_reasons[sdata->vif.cab_queue] == 0 && 747 skb_queue_empty(&local->pending[sdata->vif.cab_queue]))) { 748 for (ac = 0; ac < n_acs; ac++) { 749 int ac_queue = sdata->vif.hw_queue[ac]; 750 751 if (local->queue_stop_reasons[ac_queue] == 0 && 752 skb_queue_empty(&local->pending[ac_queue])) 753 netif_start_subqueue(dev, ac); 754 } 755 } 756 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); 757 } 758 759 return 0; 760 err_del_interface: 761 drv_remove_interface(local, sdata); 762 err_stop: 763 if (!local->open_count) 764 drv_stop(local); 765 err_del_bss: 766 sdata->bss = NULL; 767 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) { 768 mutex_lock(&local->mtx); 769 list_del(&sdata->u.vlan.list); 770 mutex_unlock(&local->mtx); 771 } 772 /* might already be clear but that doesn't matter */ 773 clear_bit(SDATA_STATE_RUNNING, &sdata->state); 774 return res; 775 } 776 777 static int ieee80211_open(struct net_device *dev) 778 { 779 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); 780 int err; 781 782 /* fail early if user set an invalid address */ 783 if (!is_valid_ether_addr(dev->dev_addr)) 784 return -EADDRNOTAVAIL; 785 786 err = ieee80211_check_concurrent_iface(sdata, sdata->vif.type); 787 if (err) 788 return err; 789 790 return ieee80211_do_open(&sdata->wdev, true); 791 } 792 793 static void ieee80211_do_stop(struct ieee80211_sub_if_data *sdata, 794 bool going_down) 795 { 796 struct ieee80211_local *local = sdata->local; 797 unsigned long flags; 798 struct sk_buff *skb, *tmp; 799 u32 hw_reconf_flags = 0; 800 int i, flushed; 801 struct ps_data *ps; 802 struct cfg80211_chan_def chandef; 803 bool cancel_scan; 804 struct cfg80211_nan_func *func; 805 806 clear_bit(SDATA_STATE_RUNNING, &sdata->state); 807 808 cancel_scan = rcu_access_pointer(local->scan_sdata) == sdata; 809 if (cancel_scan) 810 ieee80211_scan_cancel(local); 811 812 /* 813 * Stop TX on this interface first. 814 */ 815 if (sdata->dev) 816 netif_tx_stop_all_queues(sdata->dev); 817 818 ieee80211_roc_purge(local, sdata); 819 820 switch (sdata->vif.type) { 821 case NL80211_IFTYPE_STATION: 822 ieee80211_mgd_stop(sdata); 823 break; 824 case NL80211_IFTYPE_ADHOC: 825 ieee80211_ibss_stop(sdata); 826 break; 827 case NL80211_IFTYPE_MONITOR: 828 if (sdata->u.mntr.flags & MONITOR_FLAG_COOK_FRAMES) 829 break; 830 list_del_rcu(&sdata->u.mntr.list); 831 break; 832 default: 833 break; 834 } 835 836 /* 837 * Remove all stations associated with this interface. 838 * 839 * This must be done before calling ops->remove_interface() 840 * because otherwise we can later invoke ops->sta_notify() 841 * whenever the STAs are removed, and that invalidates driver 842 * assumptions about always getting a vif pointer that is valid 843 * (because if we remove a STA after ops->remove_interface() 844 * the driver will have removed the vif info already!) 845 * 846 * In WDS mode a station must exist here and be flushed, for 847 * AP_VLANs stations may exist since there's nothing else that 848 * would have removed them, but in other modes there shouldn't 849 * be any stations. 850 */ 851 flushed = sta_info_flush(sdata); 852 WARN_ON_ONCE(sdata->vif.type != NL80211_IFTYPE_AP_VLAN && 853 ((sdata->vif.type != NL80211_IFTYPE_WDS && flushed > 0) || 854 (sdata->vif.type == NL80211_IFTYPE_WDS && flushed != 1))); 855 856 /* don't count this interface for allmulti while it is down */ 857 if (sdata->flags & IEEE80211_SDATA_ALLMULTI) 858 atomic_dec(&local->iff_allmultis); 859 860 if (sdata->vif.type == NL80211_IFTYPE_AP) { 861 local->fif_pspoll--; 862 local->fif_probe_req--; 863 } else if (sdata->vif.type == NL80211_IFTYPE_ADHOC) { 864 local->fif_probe_req--; 865 } 866 867 if (sdata->dev) { 868 netif_addr_lock_bh(sdata->dev); 869 spin_lock_bh(&local->filter_lock); 870 __hw_addr_unsync(&local->mc_list, &sdata->dev->mc, 871 sdata->dev->addr_len); 872 spin_unlock_bh(&local->filter_lock); 873 netif_addr_unlock_bh(sdata->dev); 874 } 875 876 del_timer_sync(&local->dynamic_ps_timer); 877 cancel_work_sync(&local->dynamic_ps_enable_work); 878 879 cancel_work_sync(&sdata->recalc_smps); 880 sdata_lock(sdata); 881 mutex_lock(&local->mtx); 882 sdata->vif.csa_active = false; 883 if (sdata->vif.type == NL80211_IFTYPE_STATION) 884 sdata->u.mgd.csa_waiting_bcn = false; 885 if (sdata->csa_block_tx) { 886 ieee80211_wake_vif_queues(local, sdata, 887 IEEE80211_QUEUE_STOP_REASON_CSA); 888 sdata->csa_block_tx = false; 889 } 890 mutex_unlock(&local->mtx); 891 sdata_unlock(sdata); 892 893 cancel_work_sync(&sdata->csa_finalize_work); 894 895 cancel_delayed_work_sync(&sdata->dfs_cac_timer_work); 896 897 if (sdata->wdev.cac_started) { 898 chandef = sdata->vif.bss_conf.chandef; 899 WARN_ON(local->suspended); 900 mutex_lock(&local->mtx); 901 ieee80211_vif_release_channel(sdata); 902 mutex_unlock(&local->mtx); 903 cfg80211_cac_event(sdata->dev, &chandef, 904 NL80211_RADAR_CAC_ABORTED, 905 GFP_KERNEL); 906 } 907 908 /* APs need special treatment */ 909 if (sdata->vif.type == NL80211_IFTYPE_AP) { 910 struct ieee80211_sub_if_data *vlan, *tmpsdata; 911 912 /* down all dependent devices, that is VLANs */ 913 list_for_each_entry_safe(vlan, tmpsdata, &sdata->u.ap.vlans, 914 u.vlan.list) 915 dev_close(vlan->dev); 916 WARN_ON(!list_empty(&sdata->u.ap.vlans)); 917 } else if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) { 918 /* remove all packets in parent bc_buf pointing to this dev */ 919 ps = &sdata->bss->ps; 920 921 spin_lock_irqsave(&ps->bc_buf.lock, flags); 922 skb_queue_walk_safe(&ps->bc_buf, skb, tmp) { 923 if (skb->dev == sdata->dev) { 924 __skb_unlink(skb, &ps->bc_buf); 925 local->total_ps_buffered--; 926 ieee80211_free_txskb(&local->hw, skb); 927 } 928 } 929 spin_unlock_irqrestore(&ps->bc_buf.lock, flags); 930 } 931 932 if (going_down) 933 local->open_count--; 934 935 switch (sdata->vif.type) { 936 case NL80211_IFTYPE_AP_VLAN: 937 mutex_lock(&local->mtx); 938 list_del(&sdata->u.vlan.list); 939 mutex_unlock(&local->mtx); 940 RCU_INIT_POINTER(sdata->vif.chanctx_conf, NULL); 941 /* see comment in the default case below */ 942 ieee80211_free_keys(sdata, true); 943 /* no need to tell driver */ 944 break; 945 case NL80211_IFTYPE_MONITOR: 946 if (sdata->u.mntr.flags & MONITOR_FLAG_COOK_FRAMES) { 947 local->cooked_mntrs--; 948 break; 949 } 950 951 local->monitors--; 952 if (local->monitors == 0) { 953 local->hw.conf.flags &= ~IEEE80211_CONF_MONITOR; 954 hw_reconf_flags |= IEEE80211_CONF_CHANGE_MONITOR; 955 } 956 957 ieee80211_adjust_monitor_flags(sdata, -1); 958 break; 959 case NL80211_IFTYPE_NAN: 960 /* clean all the functions */ 961 spin_lock_bh(&sdata->u.nan.func_lock); 962 963 idr_for_each_entry(&sdata->u.nan.function_inst_ids, func, i) { 964 idr_remove(&sdata->u.nan.function_inst_ids, i); 965 cfg80211_free_nan_func(func); 966 } 967 idr_destroy(&sdata->u.nan.function_inst_ids); 968 969 spin_unlock_bh(&sdata->u.nan.func_lock); 970 break; 971 case NL80211_IFTYPE_P2P_DEVICE: 972 /* relies on synchronize_rcu() below */ 973 RCU_INIT_POINTER(local->p2p_sdata, NULL); 974 /* fall through */ 975 default: 976 cancel_work_sync(&sdata->work); 977 /* 978 * When we get here, the interface is marked down. 979 * Free the remaining keys, if there are any 980 * (which can happen in AP mode if userspace sets 981 * keys before the interface is operating, and maybe 982 * also in WDS mode) 983 * 984 * Force the key freeing to always synchronize_net() 985 * to wait for the RX path in case it is using this 986 * interface enqueuing frames at this very time on 987 * another CPU. 988 */ 989 ieee80211_free_keys(sdata, true); 990 skb_queue_purge(&sdata->skb_queue); 991 } 992 993 spin_lock_irqsave(&local->queue_stop_reason_lock, flags); 994 for (i = 0; i < IEEE80211_MAX_QUEUES; i++) { 995 skb_queue_walk_safe(&local->pending[i], skb, tmp) { 996 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); 997 if (info->control.vif == &sdata->vif) { 998 __skb_unlink(skb, &local->pending[i]); 999 ieee80211_free_txskb(&local->hw, skb); 1000 } 1001 } 1002 } 1003 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); 1004 1005 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) 1006 ieee80211_txq_remove_vlan(local, sdata); 1007 1008 sdata->bss = NULL; 1009 1010 if (local->open_count == 0) 1011 ieee80211_clear_tx_pending(local); 1012 1013 sdata->vif.bss_conf.beacon_int = 0; 1014 1015 /* 1016 * If the interface goes down while suspended, presumably because 1017 * the device was unplugged and that happens before our resume, 1018 * then the driver is already unconfigured and the remainder of 1019 * this function isn't needed. 1020 * XXX: what about WoWLAN? If the device has software state, e.g. 1021 * memory allocated, it might expect teardown commands from 1022 * mac80211 here? 1023 */ 1024 if (local->suspended) { 1025 WARN_ON(local->wowlan); 1026 WARN_ON(rtnl_dereference(local->monitor_sdata)); 1027 return; 1028 } 1029 1030 switch (sdata->vif.type) { 1031 case NL80211_IFTYPE_AP_VLAN: 1032 break; 1033 case NL80211_IFTYPE_MONITOR: 1034 if (local->monitors == 0) 1035 ieee80211_del_virtual_monitor(local); 1036 1037 mutex_lock(&local->mtx); 1038 ieee80211_recalc_idle(local); 1039 mutex_unlock(&local->mtx); 1040 1041 if (!(sdata->u.mntr.flags & MONITOR_FLAG_ACTIVE)) 1042 break; 1043 1044 /* fall through */ 1045 default: 1046 if (going_down) 1047 drv_remove_interface(local, sdata); 1048 } 1049 1050 ieee80211_recalc_ps(local); 1051 1052 if (cancel_scan) 1053 flush_delayed_work(&local->scan_work); 1054 1055 if (local->open_count == 0) { 1056 ieee80211_stop_device(local); 1057 1058 /* no reconfiguring after stop! */ 1059 return; 1060 } 1061 1062 /* do after stop to avoid reconfiguring when we stop anyway */ 1063 ieee80211_configure_filter(local); 1064 ieee80211_hw_config(local, hw_reconf_flags); 1065 1066 if (local->monitors == local->open_count) 1067 ieee80211_add_virtual_monitor(local); 1068 } 1069 1070 static int ieee80211_stop(struct net_device *dev) 1071 { 1072 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); 1073 1074 ieee80211_do_stop(sdata, true); 1075 1076 return 0; 1077 } 1078 1079 static void ieee80211_set_multicast_list(struct net_device *dev) 1080 { 1081 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); 1082 struct ieee80211_local *local = sdata->local; 1083 int allmulti, sdata_allmulti; 1084 1085 allmulti = !!(dev->flags & IFF_ALLMULTI); 1086 sdata_allmulti = !!(sdata->flags & IEEE80211_SDATA_ALLMULTI); 1087 1088 if (allmulti != sdata_allmulti) { 1089 if (dev->flags & IFF_ALLMULTI) 1090 atomic_inc(&local->iff_allmultis); 1091 else 1092 atomic_dec(&local->iff_allmultis); 1093 sdata->flags ^= IEEE80211_SDATA_ALLMULTI; 1094 } 1095 1096 spin_lock_bh(&local->filter_lock); 1097 __hw_addr_sync(&local->mc_list, &dev->mc, dev->addr_len); 1098 spin_unlock_bh(&local->filter_lock); 1099 ieee80211_queue_work(&local->hw, &local->reconfig_filter); 1100 } 1101 1102 /* 1103 * Called when the netdev is removed or, by the code below, before 1104 * the interface type changes. 1105 */ 1106 static void ieee80211_teardown_sdata(struct ieee80211_sub_if_data *sdata) 1107 { 1108 int i; 1109 1110 /* free extra data */ 1111 ieee80211_free_keys(sdata, false); 1112 1113 ieee80211_debugfs_remove_netdev(sdata); 1114 1115 for (i = 0; i < IEEE80211_FRAGMENT_MAX; i++) 1116 __skb_queue_purge(&sdata->fragments[i].skb_list); 1117 sdata->fragment_next = 0; 1118 1119 if (ieee80211_vif_is_mesh(&sdata->vif)) 1120 ieee80211_mesh_teardown_sdata(sdata); 1121 } 1122 1123 static void ieee80211_uninit(struct net_device *dev) 1124 { 1125 ieee80211_teardown_sdata(IEEE80211_DEV_TO_SUB_IF(dev)); 1126 } 1127 1128 static u16 ieee80211_netdev_select_queue(struct net_device *dev, 1129 struct sk_buff *skb, 1130 struct net_device *sb_dev) 1131 { 1132 return ieee80211_select_queue(IEEE80211_DEV_TO_SUB_IF(dev), skb); 1133 } 1134 1135 static void 1136 ieee80211_get_stats64(struct net_device *dev, struct rtnl_link_stats64 *stats) 1137 { 1138 int i; 1139 1140 for_each_possible_cpu(i) { 1141 const struct pcpu_sw_netstats *tstats; 1142 u64 rx_packets, rx_bytes, tx_packets, tx_bytes; 1143 unsigned int start; 1144 1145 tstats = per_cpu_ptr(dev->tstats, i); 1146 1147 do { 1148 start = u64_stats_fetch_begin_irq(&tstats->syncp); 1149 rx_packets = tstats->rx_packets; 1150 tx_packets = tstats->tx_packets; 1151 rx_bytes = tstats->rx_bytes; 1152 tx_bytes = tstats->tx_bytes; 1153 } while (u64_stats_fetch_retry_irq(&tstats->syncp, start)); 1154 1155 stats->rx_packets += rx_packets; 1156 stats->tx_packets += tx_packets; 1157 stats->rx_bytes += rx_bytes; 1158 stats->tx_bytes += tx_bytes; 1159 } 1160 } 1161 1162 static const struct net_device_ops ieee80211_dataif_ops = { 1163 .ndo_open = ieee80211_open, 1164 .ndo_stop = ieee80211_stop, 1165 .ndo_uninit = ieee80211_uninit, 1166 .ndo_start_xmit = ieee80211_subif_start_xmit, 1167 .ndo_set_rx_mode = ieee80211_set_multicast_list, 1168 .ndo_set_mac_address = ieee80211_change_mac, 1169 .ndo_select_queue = ieee80211_netdev_select_queue, 1170 .ndo_get_stats64 = ieee80211_get_stats64, 1171 }; 1172 1173 static u16 ieee80211_monitor_select_queue(struct net_device *dev, 1174 struct sk_buff *skb, 1175 struct net_device *sb_dev) 1176 { 1177 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); 1178 struct ieee80211_local *local = sdata->local; 1179 struct ieee80211_hdr *hdr; 1180 struct ieee80211_radiotap_header *rtap = (void *)skb->data; 1181 1182 if (local->hw.queues < IEEE80211_NUM_ACS) 1183 return 0; 1184 1185 if (skb->len < 4 || 1186 skb->len < le16_to_cpu(rtap->it_len) + 2 /* frame control */) 1187 return 0; /* doesn't matter, frame will be dropped */ 1188 1189 hdr = (void *)((u8 *)skb->data + le16_to_cpu(rtap->it_len)); 1190 1191 return ieee80211_select_queue_80211(sdata, skb, hdr); 1192 } 1193 1194 static const struct net_device_ops ieee80211_monitorif_ops = { 1195 .ndo_open = ieee80211_open, 1196 .ndo_stop = ieee80211_stop, 1197 .ndo_uninit = ieee80211_uninit, 1198 .ndo_start_xmit = ieee80211_monitor_start_xmit, 1199 .ndo_set_rx_mode = ieee80211_set_multicast_list, 1200 .ndo_set_mac_address = ieee80211_change_mac, 1201 .ndo_select_queue = ieee80211_monitor_select_queue, 1202 .ndo_get_stats64 = ieee80211_get_stats64, 1203 }; 1204 1205 static const struct net_device_ops ieee80211_dataif_8023_ops = { 1206 .ndo_open = ieee80211_open, 1207 .ndo_stop = ieee80211_stop, 1208 .ndo_uninit = ieee80211_uninit, 1209 .ndo_start_xmit = ieee80211_subif_start_xmit_8023, 1210 .ndo_set_rx_mode = ieee80211_set_multicast_list, 1211 .ndo_set_mac_address = ieee80211_change_mac, 1212 .ndo_select_queue = ieee80211_netdev_select_queue, 1213 .ndo_get_stats64 = ieee80211_get_stats64, 1214 }; 1215 1216 static void __ieee80211_set_hw_80211_encap(struct ieee80211_sub_if_data *sdata, 1217 bool enable) 1218 { 1219 sdata->dev->netdev_ops = enable ? &ieee80211_dataif_8023_ops : 1220 &ieee80211_dataif_ops; 1221 sdata->hw_80211_encap = enable; 1222 } 1223 1224 bool ieee80211_set_hw_80211_encap(struct ieee80211_vif *vif, bool enable) 1225 { 1226 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 1227 struct ieee80211_local *local = sdata->local; 1228 struct ieee80211_sub_if_data *iter; 1229 struct ieee80211_key *key; 1230 1231 mutex_lock(&local->iflist_mtx); 1232 list_for_each_entry(iter, &local->interfaces, list) { 1233 struct ieee80211_sub_if_data *disable = NULL; 1234 1235 if (vif->type == NL80211_IFTYPE_MONITOR) { 1236 disable = iter; 1237 __ieee80211_set_hw_80211_encap(iter, false); 1238 } else if (iter->vif.type == NL80211_IFTYPE_MONITOR) { 1239 disable = sdata; 1240 enable = false; 1241 } 1242 if (disable) 1243 sdata_dbg(disable, 1244 "disable hw 80211 encap due to mon co-exist\n"); 1245 } 1246 mutex_unlock(&local->iflist_mtx); 1247 1248 if (enable == sdata->hw_80211_encap) 1249 return enable; 1250 1251 if (!sdata->dev) 1252 return false; 1253 1254 if (!ieee80211_hw_check(&local->hw, SUPPORTS_TX_FRAG) && 1255 (local->hw.wiphy->frag_threshold != (u32)-1)) 1256 enable = false; 1257 1258 mutex_lock(&sdata->local->key_mtx); 1259 list_for_each_entry(key, &sdata->key_list, list) { 1260 if (key->conf.cipher == WLAN_CIPHER_SUITE_TKIP) 1261 enable = false; 1262 } 1263 mutex_unlock(&sdata->local->key_mtx); 1264 1265 __ieee80211_set_hw_80211_encap(sdata, enable); 1266 1267 return enable; 1268 } 1269 EXPORT_SYMBOL(ieee80211_set_hw_80211_encap); 1270 1271 static void ieee80211_if_free(struct net_device *dev) 1272 { 1273 free_percpu(dev->tstats); 1274 } 1275 1276 static void ieee80211_if_setup(struct net_device *dev) 1277 { 1278 ether_setup(dev); 1279 dev->priv_flags &= ~IFF_TX_SKB_SHARING; 1280 dev->netdev_ops = &ieee80211_dataif_ops; 1281 dev->needs_free_netdev = true; 1282 dev->priv_destructor = ieee80211_if_free; 1283 } 1284 1285 static void ieee80211_if_setup_no_queue(struct net_device *dev) 1286 { 1287 ieee80211_if_setup(dev); 1288 dev->priv_flags |= IFF_NO_QUEUE; 1289 } 1290 1291 static void ieee80211_iface_work(struct work_struct *work) 1292 { 1293 struct ieee80211_sub_if_data *sdata = 1294 container_of(work, struct ieee80211_sub_if_data, work); 1295 struct ieee80211_local *local = sdata->local; 1296 struct sk_buff *skb; 1297 struct sta_info *sta; 1298 1299 if (!ieee80211_sdata_running(sdata)) 1300 return; 1301 1302 if (test_bit(SCAN_SW_SCANNING, &local->scanning)) 1303 return; 1304 1305 if (!ieee80211_can_run_worker(local)) 1306 return; 1307 1308 /* first process frames */ 1309 while ((skb = skb_dequeue(&sdata->skb_queue))) { 1310 struct ieee80211_mgmt *mgmt = (void *)skb->data; 1311 1312 if (ieee80211_is_action(mgmt->frame_control) && 1313 mgmt->u.action.category == WLAN_CATEGORY_BACK) { 1314 int len = skb->len; 1315 1316 mutex_lock(&local->sta_mtx); 1317 sta = sta_info_get_bss(sdata, mgmt->sa); 1318 if (sta) { 1319 switch (mgmt->u.action.u.addba_req.action_code) { 1320 case WLAN_ACTION_ADDBA_REQ: 1321 ieee80211_process_addba_request( 1322 local, sta, mgmt, len); 1323 break; 1324 case WLAN_ACTION_ADDBA_RESP: 1325 ieee80211_process_addba_resp(local, sta, 1326 mgmt, len); 1327 break; 1328 case WLAN_ACTION_DELBA: 1329 ieee80211_process_delba(sdata, sta, 1330 mgmt, len); 1331 break; 1332 default: 1333 WARN_ON(1); 1334 break; 1335 } 1336 } 1337 mutex_unlock(&local->sta_mtx); 1338 } else if (ieee80211_is_action(mgmt->frame_control) && 1339 mgmt->u.action.category == WLAN_CATEGORY_VHT) { 1340 switch (mgmt->u.action.u.vht_group_notif.action_code) { 1341 case WLAN_VHT_ACTION_OPMODE_NOTIF: { 1342 struct ieee80211_rx_status *status; 1343 enum nl80211_band band; 1344 u8 opmode; 1345 1346 status = IEEE80211_SKB_RXCB(skb); 1347 band = status->band; 1348 opmode = mgmt->u.action.u.vht_opmode_notif.operating_mode; 1349 1350 mutex_lock(&local->sta_mtx); 1351 sta = sta_info_get_bss(sdata, mgmt->sa); 1352 1353 if (sta) 1354 ieee80211_vht_handle_opmode(sdata, sta, 1355 opmode, 1356 band); 1357 1358 mutex_unlock(&local->sta_mtx); 1359 break; 1360 } 1361 case WLAN_VHT_ACTION_GROUPID_MGMT: 1362 ieee80211_process_mu_groups(sdata, mgmt); 1363 break; 1364 default: 1365 WARN_ON(1); 1366 break; 1367 } 1368 } else if (ieee80211_is_data_qos(mgmt->frame_control)) { 1369 struct ieee80211_hdr *hdr = (void *)mgmt; 1370 /* 1371 * So the frame isn't mgmt, but frame_control 1372 * is at the right place anyway, of course, so 1373 * the if statement is correct. 1374 * 1375 * Warn if we have other data frame types here, 1376 * they must not get here. 1377 */ 1378 WARN_ON(hdr->frame_control & 1379 cpu_to_le16(IEEE80211_STYPE_NULLFUNC)); 1380 WARN_ON(!(hdr->seq_ctrl & 1381 cpu_to_le16(IEEE80211_SCTL_FRAG))); 1382 /* 1383 * This was a fragment of a frame, received while 1384 * a block-ack session was active. That cannot be 1385 * right, so terminate the session. 1386 */ 1387 mutex_lock(&local->sta_mtx); 1388 sta = sta_info_get_bss(sdata, mgmt->sa); 1389 if (sta) { 1390 u16 tid = ieee80211_get_tid(hdr); 1391 1392 __ieee80211_stop_rx_ba_session( 1393 sta, tid, WLAN_BACK_RECIPIENT, 1394 WLAN_REASON_QSTA_REQUIRE_SETUP, 1395 true); 1396 } 1397 mutex_unlock(&local->sta_mtx); 1398 } else switch (sdata->vif.type) { 1399 case NL80211_IFTYPE_STATION: 1400 ieee80211_sta_rx_queued_mgmt(sdata, skb); 1401 break; 1402 case NL80211_IFTYPE_ADHOC: 1403 ieee80211_ibss_rx_queued_mgmt(sdata, skb); 1404 break; 1405 case NL80211_IFTYPE_MESH_POINT: 1406 if (!ieee80211_vif_is_mesh(&sdata->vif)) 1407 break; 1408 ieee80211_mesh_rx_queued_mgmt(sdata, skb); 1409 break; 1410 default: 1411 WARN(1, "frame for unexpected interface type"); 1412 break; 1413 } 1414 1415 kfree_skb(skb); 1416 } 1417 1418 /* then other type-dependent work */ 1419 switch (sdata->vif.type) { 1420 case NL80211_IFTYPE_STATION: 1421 ieee80211_sta_work(sdata); 1422 break; 1423 case NL80211_IFTYPE_ADHOC: 1424 ieee80211_ibss_work(sdata); 1425 break; 1426 case NL80211_IFTYPE_MESH_POINT: 1427 if (!ieee80211_vif_is_mesh(&sdata->vif)) 1428 break; 1429 ieee80211_mesh_work(sdata); 1430 break; 1431 case NL80211_IFTYPE_OCB: 1432 ieee80211_ocb_work(sdata); 1433 break; 1434 default: 1435 break; 1436 } 1437 } 1438 1439 static void ieee80211_recalc_smps_work(struct work_struct *work) 1440 { 1441 struct ieee80211_sub_if_data *sdata = 1442 container_of(work, struct ieee80211_sub_if_data, recalc_smps); 1443 1444 ieee80211_recalc_smps(sdata); 1445 } 1446 1447 /* 1448 * Helper function to initialise an interface to a specific type. 1449 */ 1450 static void ieee80211_setup_sdata(struct ieee80211_sub_if_data *sdata, 1451 enum nl80211_iftype type) 1452 { 1453 static const u8 bssid_wildcard[ETH_ALEN] = {0xff, 0xff, 0xff, 1454 0xff, 0xff, 0xff}; 1455 1456 /* clear type-dependent union */ 1457 memset(&sdata->u, 0, sizeof(sdata->u)); 1458 1459 /* and set some type-dependent values */ 1460 sdata->vif.type = type; 1461 sdata->vif.p2p = false; 1462 sdata->wdev.iftype = type; 1463 1464 sdata->control_port_protocol = cpu_to_be16(ETH_P_PAE); 1465 sdata->control_port_no_encrypt = false; 1466 sdata->encrypt_headroom = IEEE80211_ENCRYPT_HEADROOM; 1467 sdata->vif.bss_conf.idle = true; 1468 sdata->vif.bss_conf.txpower = INT_MIN; /* unset */ 1469 1470 sdata->noack_map = 0; 1471 sdata->hw_80211_encap = false; 1472 1473 /* only monitor/p2p-device differ */ 1474 if (sdata->dev) { 1475 sdata->dev->netdev_ops = &ieee80211_dataif_ops; 1476 sdata->dev->type = ARPHRD_ETHER; 1477 } 1478 1479 skb_queue_head_init(&sdata->skb_queue); 1480 INIT_WORK(&sdata->work, ieee80211_iface_work); 1481 INIT_WORK(&sdata->recalc_smps, ieee80211_recalc_smps_work); 1482 INIT_WORK(&sdata->csa_finalize_work, ieee80211_csa_finalize_work); 1483 INIT_LIST_HEAD(&sdata->assigned_chanctx_list); 1484 INIT_LIST_HEAD(&sdata->reserved_chanctx_list); 1485 1486 switch (type) { 1487 case NL80211_IFTYPE_P2P_GO: 1488 type = NL80211_IFTYPE_AP; 1489 sdata->vif.type = type; 1490 sdata->vif.p2p = true; 1491 /* fall through */ 1492 case NL80211_IFTYPE_AP: 1493 skb_queue_head_init(&sdata->u.ap.ps.bc_buf); 1494 INIT_LIST_HEAD(&sdata->u.ap.vlans); 1495 sdata->vif.bss_conf.bssid = sdata->vif.addr; 1496 break; 1497 case NL80211_IFTYPE_P2P_CLIENT: 1498 type = NL80211_IFTYPE_STATION; 1499 sdata->vif.type = type; 1500 sdata->vif.p2p = true; 1501 /* fall through */ 1502 case NL80211_IFTYPE_STATION: 1503 sdata->vif.bss_conf.bssid = sdata->u.mgd.bssid; 1504 ieee80211_sta_setup_sdata(sdata); 1505 break; 1506 case NL80211_IFTYPE_OCB: 1507 sdata->vif.bss_conf.bssid = bssid_wildcard; 1508 ieee80211_ocb_setup_sdata(sdata); 1509 break; 1510 case NL80211_IFTYPE_ADHOC: 1511 sdata->vif.bss_conf.bssid = sdata->u.ibss.bssid; 1512 ieee80211_ibss_setup_sdata(sdata); 1513 break; 1514 case NL80211_IFTYPE_MESH_POINT: 1515 if (ieee80211_vif_is_mesh(&sdata->vif)) 1516 ieee80211_mesh_init_sdata(sdata); 1517 break; 1518 case NL80211_IFTYPE_MONITOR: 1519 sdata->dev->type = ARPHRD_IEEE80211_RADIOTAP; 1520 sdata->dev->netdev_ops = &ieee80211_monitorif_ops; 1521 sdata->u.mntr.flags = MONITOR_FLAG_CONTROL | 1522 MONITOR_FLAG_OTHER_BSS; 1523 break; 1524 case NL80211_IFTYPE_WDS: 1525 sdata->vif.bss_conf.bssid = NULL; 1526 break; 1527 case NL80211_IFTYPE_NAN: 1528 idr_init(&sdata->u.nan.function_inst_ids); 1529 spin_lock_init(&sdata->u.nan.func_lock); 1530 sdata->vif.bss_conf.bssid = sdata->vif.addr; 1531 break; 1532 case NL80211_IFTYPE_AP_VLAN: 1533 case NL80211_IFTYPE_P2P_DEVICE: 1534 sdata->vif.bss_conf.bssid = sdata->vif.addr; 1535 break; 1536 case NL80211_IFTYPE_UNSPECIFIED: 1537 case NUM_NL80211_IFTYPES: 1538 WARN_ON(1); 1539 break; 1540 } 1541 1542 ieee80211_debugfs_add_netdev(sdata); 1543 } 1544 1545 static int ieee80211_runtime_change_iftype(struct ieee80211_sub_if_data *sdata, 1546 enum nl80211_iftype type) 1547 { 1548 struct ieee80211_local *local = sdata->local; 1549 int ret, err; 1550 enum nl80211_iftype internal_type = type; 1551 bool p2p = false; 1552 1553 ASSERT_RTNL(); 1554 1555 if (!local->ops->change_interface) 1556 return -EBUSY; 1557 1558 switch (sdata->vif.type) { 1559 case NL80211_IFTYPE_AP: 1560 case NL80211_IFTYPE_STATION: 1561 case NL80211_IFTYPE_ADHOC: 1562 case NL80211_IFTYPE_OCB: 1563 /* 1564 * Could maybe also all others here? 1565 * Just not sure how that interacts 1566 * with the RX/config path e.g. for 1567 * mesh. 1568 */ 1569 break; 1570 default: 1571 return -EBUSY; 1572 } 1573 1574 switch (type) { 1575 case NL80211_IFTYPE_AP: 1576 case NL80211_IFTYPE_STATION: 1577 case NL80211_IFTYPE_ADHOC: 1578 case NL80211_IFTYPE_OCB: 1579 /* 1580 * Could probably support everything 1581 * but WDS here (WDS do_open can fail 1582 * under memory pressure, which this 1583 * code isn't prepared to handle). 1584 */ 1585 break; 1586 case NL80211_IFTYPE_P2P_CLIENT: 1587 p2p = true; 1588 internal_type = NL80211_IFTYPE_STATION; 1589 break; 1590 case NL80211_IFTYPE_P2P_GO: 1591 p2p = true; 1592 internal_type = NL80211_IFTYPE_AP; 1593 break; 1594 default: 1595 return -EBUSY; 1596 } 1597 1598 ret = ieee80211_check_concurrent_iface(sdata, internal_type); 1599 if (ret) 1600 return ret; 1601 1602 ieee80211_do_stop(sdata, false); 1603 1604 ieee80211_teardown_sdata(sdata); 1605 1606 ret = drv_change_interface(local, sdata, internal_type, p2p); 1607 if (ret) 1608 type = ieee80211_vif_type_p2p(&sdata->vif); 1609 1610 /* 1611 * Ignore return value here, there's not much we can do since 1612 * the driver changed the interface type internally already. 1613 * The warnings will hopefully make driver authors fix it :-) 1614 */ 1615 ieee80211_check_queues(sdata, type); 1616 1617 ieee80211_setup_sdata(sdata, type); 1618 1619 err = ieee80211_do_open(&sdata->wdev, false); 1620 WARN(err, "type change: do_open returned %d", err); 1621 1622 return ret; 1623 } 1624 1625 int ieee80211_if_change_type(struct ieee80211_sub_if_data *sdata, 1626 enum nl80211_iftype type) 1627 { 1628 int ret; 1629 1630 ASSERT_RTNL(); 1631 1632 if (type == ieee80211_vif_type_p2p(&sdata->vif)) 1633 return 0; 1634 1635 if (ieee80211_sdata_running(sdata)) { 1636 ret = ieee80211_runtime_change_iftype(sdata, type); 1637 if (ret) 1638 return ret; 1639 } else { 1640 /* Purge and reset type-dependent state. */ 1641 ieee80211_teardown_sdata(sdata); 1642 ieee80211_setup_sdata(sdata, type); 1643 } 1644 1645 /* reset some values that shouldn't be kept across type changes */ 1646 if (type == NL80211_IFTYPE_STATION) 1647 sdata->u.mgd.use_4addr = false; 1648 1649 return 0; 1650 } 1651 1652 static void ieee80211_assign_perm_addr(struct ieee80211_local *local, 1653 u8 *perm_addr, enum nl80211_iftype type) 1654 { 1655 struct ieee80211_sub_if_data *sdata; 1656 u64 mask, start, addr, val, inc; 1657 u8 *m; 1658 u8 tmp_addr[ETH_ALEN]; 1659 int i; 1660 1661 /* default ... something at least */ 1662 memcpy(perm_addr, local->hw.wiphy->perm_addr, ETH_ALEN); 1663 1664 if (is_zero_ether_addr(local->hw.wiphy->addr_mask) && 1665 local->hw.wiphy->n_addresses <= 1) 1666 return; 1667 1668 mutex_lock(&local->iflist_mtx); 1669 1670 switch (type) { 1671 case NL80211_IFTYPE_MONITOR: 1672 /* doesn't matter */ 1673 break; 1674 case NL80211_IFTYPE_WDS: 1675 case NL80211_IFTYPE_AP_VLAN: 1676 /* match up with an AP interface */ 1677 list_for_each_entry(sdata, &local->interfaces, list) { 1678 if (sdata->vif.type != NL80211_IFTYPE_AP) 1679 continue; 1680 memcpy(perm_addr, sdata->vif.addr, ETH_ALEN); 1681 break; 1682 } 1683 /* keep default if no AP interface present */ 1684 break; 1685 case NL80211_IFTYPE_P2P_CLIENT: 1686 case NL80211_IFTYPE_P2P_GO: 1687 if (ieee80211_hw_check(&local->hw, P2P_DEV_ADDR_FOR_INTF)) { 1688 list_for_each_entry(sdata, &local->interfaces, list) { 1689 if (sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE) 1690 continue; 1691 if (!ieee80211_sdata_running(sdata)) 1692 continue; 1693 memcpy(perm_addr, sdata->vif.addr, ETH_ALEN); 1694 goto out_unlock; 1695 } 1696 } 1697 /* fall through */ 1698 default: 1699 /* assign a new address if possible -- try n_addresses first */ 1700 for (i = 0; i < local->hw.wiphy->n_addresses; i++) { 1701 bool used = false; 1702 1703 list_for_each_entry(sdata, &local->interfaces, list) { 1704 if (ether_addr_equal(local->hw.wiphy->addresses[i].addr, 1705 sdata->vif.addr)) { 1706 used = true; 1707 break; 1708 } 1709 } 1710 1711 if (!used) { 1712 memcpy(perm_addr, 1713 local->hw.wiphy->addresses[i].addr, 1714 ETH_ALEN); 1715 break; 1716 } 1717 } 1718 1719 /* try mask if available */ 1720 if (is_zero_ether_addr(local->hw.wiphy->addr_mask)) 1721 break; 1722 1723 m = local->hw.wiphy->addr_mask; 1724 mask = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) | 1725 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) | 1726 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8); 1727 1728 if (__ffs64(mask) + hweight64(mask) != fls64(mask)) { 1729 /* not a contiguous mask ... not handled now! */ 1730 pr_info("not contiguous\n"); 1731 break; 1732 } 1733 1734 /* 1735 * Pick address of existing interface in case user changed 1736 * MAC address manually, default to perm_addr. 1737 */ 1738 m = local->hw.wiphy->perm_addr; 1739 list_for_each_entry(sdata, &local->interfaces, list) { 1740 if (sdata->vif.type == NL80211_IFTYPE_MONITOR) 1741 continue; 1742 m = sdata->vif.addr; 1743 break; 1744 } 1745 start = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) | 1746 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) | 1747 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8); 1748 1749 inc = 1ULL<<__ffs64(mask); 1750 val = (start & mask); 1751 addr = (start & ~mask) | (val & mask); 1752 do { 1753 bool used = false; 1754 1755 tmp_addr[5] = addr >> 0*8; 1756 tmp_addr[4] = addr >> 1*8; 1757 tmp_addr[3] = addr >> 2*8; 1758 tmp_addr[2] = addr >> 3*8; 1759 tmp_addr[1] = addr >> 4*8; 1760 tmp_addr[0] = addr >> 5*8; 1761 1762 val += inc; 1763 1764 list_for_each_entry(sdata, &local->interfaces, list) { 1765 if (ether_addr_equal(tmp_addr, sdata->vif.addr)) { 1766 used = true; 1767 break; 1768 } 1769 } 1770 1771 if (!used) { 1772 memcpy(perm_addr, tmp_addr, ETH_ALEN); 1773 break; 1774 } 1775 addr = (start & ~mask) | (val & mask); 1776 } while (addr != start); 1777 1778 break; 1779 } 1780 1781 out_unlock: 1782 mutex_unlock(&local->iflist_mtx); 1783 } 1784 1785 int ieee80211_if_add(struct ieee80211_local *local, const char *name, 1786 unsigned char name_assign_type, 1787 struct wireless_dev **new_wdev, enum nl80211_iftype type, 1788 struct vif_params *params) 1789 { 1790 struct net_device *ndev = NULL; 1791 struct ieee80211_sub_if_data *sdata = NULL; 1792 struct txq_info *txqi; 1793 void (*if_setup)(struct net_device *dev); 1794 int ret, i; 1795 int txqs = 1; 1796 1797 ASSERT_RTNL(); 1798 1799 if (type == NL80211_IFTYPE_P2P_DEVICE || type == NL80211_IFTYPE_NAN) { 1800 struct wireless_dev *wdev; 1801 1802 sdata = kzalloc(sizeof(*sdata) + local->hw.vif_data_size, 1803 GFP_KERNEL); 1804 if (!sdata) 1805 return -ENOMEM; 1806 wdev = &sdata->wdev; 1807 1808 sdata->dev = NULL; 1809 strlcpy(sdata->name, name, IFNAMSIZ); 1810 ieee80211_assign_perm_addr(local, wdev->address, type); 1811 memcpy(sdata->vif.addr, wdev->address, ETH_ALEN); 1812 } else { 1813 int size = ALIGN(sizeof(*sdata) + local->hw.vif_data_size, 1814 sizeof(void *)); 1815 int txq_size = 0; 1816 1817 if (local->ops->wake_tx_queue && 1818 type != NL80211_IFTYPE_AP_VLAN && 1819 (type != NL80211_IFTYPE_MONITOR || 1820 (params->flags & MONITOR_FLAG_ACTIVE))) 1821 txq_size += sizeof(struct txq_info) + 1822 local->hw.txq_data_size; 1823 1824 if (local->ops->wake_tx_queue) { 1825 if_setup = ieee80211_if_setup_no_queue; 1826 } else { 1827 if_setup = ieee80211_if_setup; 1828 if (local->hw.queues >= IEEE80211_NUM_ACS) 1829 txqs = IEEE80211_NUM_ACS; 1830 } 1831 1832 ndev = alloc_netdev_mqs(size + txq_size, 1833 name, name_assign_type, 1834 if_setup, txqs, 1); 1835 if (!ndev) 1836 return -ENOMEM; 1837 1838 if (!local->ops->wake_tx_queue && local->hw.wiphy->tx_queue_len) 1839 ndev->tx_queue_len = local->hw.wiphy->tx_queue_len; 1840 1841 dev_net_set(ndev, wiphy_net(local->hw.wiphy)); 1842 1843 ndev->tstats = netdev_alloc_pcpu_stats(struct pcpu_sw_netstats); 1844 if (!ndev->tstats) { 1845 free_netdev(ndev); 1846 return -ENOMEM; 1847 } 1848 1849 ndev->needed_headroom = local->tx_headroom + 1850 4*6 /* four MAC addresses */ 1851 + 2 + 2 + 2 + 2 /* ctl, dur, seq, qos */ 1852 + 6 /* mesh */ 1853 + 8 /* rfc1042/bridge tunnel */ 1854 - ETH_HLEN /* ethernet hard_header_len */ 1855 + IEEE80211_ENCRYPT_HEADROOM; 1856 ndev->needed_tailroom = IEEE80211_ENCRYPT_TAILROOM; 1857 1858 ret = dev_alloc_name(ndev, ndev->name); 1859 if (ret < 0) { 1860 ieee80211_if_free(ndev); 1861 free_netdev(ndev); 1862 return ret; 1863 } 1864 1865 ieee80211_assign_perm_addr(local, ndev->perm_addr, type); 1866 if (is_valid_ether_addr(params->macaddr)) 1867 memcpy(ndev->dev_addr, params->macaddr, ETH_ALEN); 1868 else 1869 memcpy(ndev->dev_addr, ndev->perm_addr, ETH_ALEN); 1870 SET_NETDEV_DEV(ndev, wiphy_dev(local->hw.wiphy)); 1871 1872 /* don't use IEEE80211_DEV_TO_SUB_IF -- it checks too much */ 1873 sdata = netdev_priv(ndev); 1874 ndev->ieee80211_ptr = &sdata->wdev; 1875 memcpy(sdata->vif.addr, ndev->dev_addr, ETH_ALEN); 1876 memcpy(sdata->name, ndev->name, IFNAMSIZ); 1877 1878 if (txq_size) { 1879 txqi = netdev_priv(ndev) + size; 1880 ieee80211_txq_init(sdata, NULL, txqi, 0); 1881 } 1882 1883 sdata->dev = ndev; 1884 } 1885 1886 /* initialise type-independent data */ 1887 sdata->wdev.wiphy = local->hw.wiphy; 1888 sdata->local = local; 1889 1890 for (i = 0; i < IEEE80211_FRAGMENT_MAX; i++) 1891 skb_queue_head_init(&sdata->fragments[i].skb_list); 1892 1893 INIT_LIST_HEAD(&sdata->key_list); 1894 1895 INIT_DELAYED_WORK(&sdata->dfs_cac_timer_work, 1896 ieee80211_dfs_cac_timer_work); 1897 INIT_DELAYED_WORK(&sdata->dec_tailroom_needed_wk, 1898 ieee80211_delayed_tailroom_dec); 1899 1900 for (i = 0; i < NUM_NL80211_BANDS; i++) { 1901 struct ieee80211_supported_band *sband; 1902 sband = local->hw.wiphy->bands[i]; 1903 sdata->rc_rateidx_mask[i] = 1904 sband ? (1 << sband->n_bitrates) - 1 : 0; 1905 if (sband) { 1906 __le16 cap; 1907 u16 *vht_rate_mask; 1908 1909 memcpy(sdata->rc_rateidx_mcs_mask[i], 1910 sband->ht_cap.mcs.rx_mask, 1911 sizeof(sdata->rc_rateidx_mcs_mask[i])); 1912 1913 cap = sband->vht_cap.vht_mcs.rx_mcs_map; 1914 vht_rate_mask = sdata->rc_rateidx_vht_mcs_mask[i]; 1915 ieee80211_get_vht_mask_from_cap(cap, vht_rate_mask); 1916 } else { 1917 memset(sdata->rc_rateidx_mcs_mask[i], 0, 1918 sizeof(sdata->rc_rateidx_mcs_mask[i])); 1919 memset(sdata->rc_rateidx_vht_mcs_mask[i], 0, 1920 sizeof(sdata->rc_rateidx_vht_mcs_mask[i])); 1921 } 1922 } 1923 1924 ieee80211_set_default_queues(sdata); 1925 1926 sdata->ap_power_level = IEEE80211_UNSET_POWER_LEVEL; 1927 sdata->user_power_level = local->user_power_level; 1928 1929 sdata->encrypt_headroom = IEEE80211_ENCRYPT_HEADROOM; 1930 1931 /* setup type-dependent data */ 1932 ieee80211_setup_sdata(sdata, type); 1933 1934 if (ndev) { 1935 ndev->ieee80211_ptr->use_4addr = params->use_4addr; 1936 if (type == NL80211_IFTYPE_STATION) 1937 sdata->u.mgd.use_4addr = params->use_4addr; 1938 1939 ndev->features |= local->hw.netdev_features; 1940 ndev->hw_features |= ndev->features & 1941 MAC80211_SUPPORTED_FEATURES_TX; 1942 1943 netdev_set_default_ethtool_ops(ndev, &ieee80211_ethtool_ops); 1944 1945 /* MTU range: 256 - 2304 */ 1946 ndev->min_mtu = 256; 1947 ndev->max_mtu = local->hw.max_mtu; 1948 1949 ret = register_netdevice(ndev); 1950 if (ret) { 1951 free_netdev(ndev); 1952 return ret; 1953 } 1954 } 1955 1956 mutex_lock(&local->iflist_mtx); 1957 list_add_tail_rcu(&sdata->list, &local->interfaces); 1958 mutex_unlock(&local->iflist_mtx); 1959 1960 if (new_wdev) 1961 *new_wdev = &sdata->wdev; 1962 1963 return 0; 1964 } 1965 1966 void ieee80211_if_remove(struct ieee80211_sub_if_data *sdata) 1967 { 1968 ASSERT_RTNL(); 1969 1970 mutex_lock(&sdata->local->iflist_mtx); 1971 list_del_rcu(&sdata->list); 1972 mutex_unlock(&sdata->local->iflist_mtx); 1973 1974 if (sdata->vif.txq) 1975 ieee80211_txq_purge(sdata->local, to_txq_info(sdata->vif.txq)); 1976 1977 synchronize_rcu(); 1978 1979 if (sdata->dev) { 1980 unregister_netdevice(sdata->dev); 1981 } else { 1982 cfg80211_unregister_wdev(&sdata->wdev); 1983 ieee80211_teardown_sdata(sdata); 1984 kfree(sdata); 1985 } 1986 } 1987 1988 void ieee80211_sdata_stop(struct ieee80211_sub_if_data *sdata) 1989 { 1990 if (WARN_ON_ONCE(!test_bit(SDATA_STATE_RUNNING, &sdata->state))) 1991 return; 1992 ieee80211_do_stop(sdata, true); 1993 } 1994 1995 void ieee80211_remove_interfaces(struct ieee80211_local *local) 1996 { 1997 struct ieee80211_sub_if_data *sdata, *tmp; 1998 LIST_HEAD(unreg_list); 1999 LIST_HEAD(wdev_list); 2000 2001 ASSERT_RTNL(); 2002 2003 /* Before destroying the interfaces, make sure they're all stopped so 2004 * that the hardware is stopped. Otherwise, the driver might still be 2005 * iterating the interfaces during the shutdown, e.g. from a worker 2006 * or from RX processing or similar, and if it does so (using atomic 2007 * iteration) while we're manipulating the list, the iteration will 2008 * crash. 2009 * 2010 * After this, the hardware should be stopped and the driver should 2011 * have stopped all of its activities, so that we can do RCU-unaware 2012 * manipulations of the interface list below. 2013 */ 2014 cfg80211_shutdown_all_interfaces(local->hw.wiphy); 2015 2016 WARN(local->open_count, "%s: open count remains %d\n", 2017 wiphy_name(local->hw.wiphy), local->open_count); 2018 2019 ieee80211_txq_teardown_flows(local); 2020 2021 mutex_lock(&local->iflist_mtx); 2022 list_for_each_entry_safe(sdata, tmp, &local->interfaces, list) { 2023 list_del(&sdata->list); 2024 2025 if (sdata->dev) 2026 unregister_netdevice_queue(sdata->dev, &unreg_list); 2027 else 2028 list_add(&sdata->list, &wdev_list); 2029 } 2030 mutex_unlock(&local->iflist_mtx); 2031 unregister_netdevice_many(&unreg_list); 2032 2033 list_for_each_entry_safe(sdata, tmp, &wdev_list, list) { 2034 list_del(&sdata->list); 2035 cfg80211_unregister_wdev(&sdata->wdev); 2036 kfree(sdata); 2037 } 2038 } 2039 2040 static int netdev_notify(struct notifier_block *nb, 2041 unsigned long state, void *ptr) 2042 { 2043 struct net_device *dev = netdev_notifier_info_to_dev(ptr); 2044 struct ieee80211_sub_if_data *sdata; 2045 2046 if (state != NETDEV_CHANGENAME) 2047 return NOTIFY_DONE; 2048 2049 if (!dev->ieee80211_ptr || !dev->ieee80211_ptr->wiphy) 2050 return NOTIFY_DONE; 2051 2052 if (dev->ieee80211_ptr->wiphy->privid != mac80211_wiphy_privid) 2053 return NOTIFY_DONE; 2054 2055 sdata = IEEE80211_DEV_TO_SUB_IF(dev); 2056 memcpy(sdata->name, dev->name, IFNAMSIZ); 2057 ieee80211_debugfs_rename_netdev(sdata); 2058 2059 return NOTIFY_OK; 2060 } 2061 2062 static struct notifier_block mac80211_netdev_notifier = { 2063 .notifier_call = netdev_notify, 2064 }; 2065 2066 int ieee80211_iface_init(void) 2067 { 2068 return register_netdevice_notifier(&mac80211_netdev_notifier); 2069 } 2070 2071 void ieee80211_iface_exit(void) 2072 { 2073 unregister_netdevice_notifier(&mac80211_netdev_notifier); 2074 } 2075 2076 void ieee80211_vif_inc_num_mcast(struct ieee80211_sub_if_data *sdata) 2077 { 2078 if (sdata->vif.type == NL80211_IFTYPE_AP) 2079 atomic_inc(&sdata->u.ap.num_mcast_sta); 2080 else if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) 2081 atomic_inc(&sdata->u.vlan.num_mcast_sta); 2082 } 2083 2084 void ieee80211_vif_dec_num_mcast(struct ieee80211_sub_if_data *sdata) 2085 { 2086 if (sdata->vif.type == NL80211_IFTYPE_AP) 2087 atomic_dec(&sdata->u.ap.num_mcast_sta); 2088 else if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) 2089 atomic_dec(&sdata->u.vlan.num_mcast_sta); 2090 } 2091