1 /* 2 * Interface handling (except master interface) 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 * 9 * This program is free software; you can redistribute it and/or modify 10 * it under the terms of the GNU General Public License version 2 as 11 * published by the Free Software Foundation. 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 46 static int ieee80211_change_mtu(struct net_device *dev, int new_mtu) 47 { 48 int meshhdrlen; 49 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); 50 51 meshhdrlen = (sdata->vif.type == NL80211_IFTYPE_MESH_POINT) ? 5 : 0; 52 53 /* FIX: what would be proper limits for MTU? 54 * This interface uses 802.3 frames. */ 55 if (new_mtu < 256 || 56 new_mtu > IEEE80211_MAX_DATA_LEN - 24 - 6 - meshhdrlen) { 57 return -EINVAL; 58 } 59 60 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG 61 printk(KERN_DEBUG "%s: setting MTU %d\n", dev->name, new_mtu); 62 #endif /* CONFIG_MAC80211_VERBOSE_DEBUG */ 63 dev->mtu = new_mtu; 64 return 0; 65 } 66 67 static int ieee80211_change_mac(struct net_device *dev, void *addr) 68 { 69 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); 70 struct sockaddr *sa = addr; 71 int ret; 72 73 if (ieee80211_sdata_running(sdata)) 74 return -EBUSY; 75 76 ret = eth_mac_addr(dev, sa); 77 78 if (ret == 0) 79 memcpy(sdata->vif.addr, sa->sa_data, ETH_ALEN); 80 81 return ret; 82 } 83 84 static inline int identical_mac_addr_allowed(int type1, int type2) 85 { 86 return type1 == NL80211_IFTYPE_MONITOR || 87 type2 == NL80211_IFTYPE_MONITOR || 88 (type1 == NL80211_IFTYPE_AP && type2 == NL80211_IFTYPE_WDS) || 89 (type1 == NL80211_IFTYPE_WDS && 90 (type2 == NL80211_IFTYPE_WDS || 91 type2 == NL80211_IFTYPE_AP)) || 92 (type1 == NL80211_IFTYPE_AP && type2 == NL80211_IFTYPE_AP_VLAN) || 93 (type1 == NL80211_IFTYPE_AP_VLAN && 94 (type2 == NL80211_IFTYPE_AP || 95 type2 == NL80211_IFTYPE_AP_VLAN)); 96 } 97 98 static int ieee80211_check_concurrent_iface(struct ieee80211_sub_if_data *sdata, 99 enum nl80211_iftype iftype) 100 { 101 struct ieee80211_local *local = sdata->local; 102 struct ieee80211_sub_if_data *nsdata; 103 struct net_device *dev = sdata->dev; 104 105 ASSERT_RTNL(); 106 107 /* we hold the RTNL here so can safely walk the list */ 108 list_for_each_entry(nsdata, &local->interfaces, list) { 109 struct net_device *ndev = nsdata->dev; 110 111 if (ndev != dev && ieee80211_sdata_running(nsdata)) { 112 /* 113 * Allow only a single IBSS interface to be up at any 114 * time. This is restricted because beacon distribution 115 * cannot work properly if both are in the same IBSS. 116 * 117 * To remove this restriction we'd have to disallow them 118 * from setting the same SSID on different IBSS interfaces 119 * belonging to the same hardware. Then, however, we're 120 * faced with having to adopt two different TSF timers... 121 */ 122 if (iftype == NL80211_IFTYPE_ADHOC && 123 nsdata->vif.type == NL80211_IFTYPE_ADHOC) 124 return -EBUSY; 125 126 /* 127 * The remaining checks are only performed for interfaces 128 * with the same MAC address. 129 */ 130 if (!ether_addr_equal(dev->dev_addr, ndev->dev_addr)) 131 continue; 132 133 /* 134 * check whether it may have the same address 135 */ 136 if (!identical_mac_addr_allowed(iftype, 137 nsdata->vif.type)) 138 return -ENOTUNIQ; 139 140 /* 141 * can only add VLANs to enabled APs 142 */ 143 if (iftype == NL80211_IFTYPE_AP_VLAN && 144 nsdata->vif.type == NL80211_IFTYPE_AP) 145 sdata->bss = &nsdata->u.ap; 146 } 147 } 148 149 return 0; 150 } 151 152 static int ieee80211_check_queues(struct ieee80211_sub_if_data *sdata) 153 { 154 int n_queues = sdata->local->hw.queues; 155 int i; 156 157 for (i = 0; i < IEEE80211_NUM_ACS; i++) { 158 if (WARN_ON_ONCE(sdata->vif.hw_queue[i] == 159 IEEE80211_INVAL_HW_QUEUE)) 160 return -EINVAL; 161 if (WARN_ON_ONCE(sdata->vif.hw_queue[i] >= 162 n_queues)) 163 return -EINVAL; 164 } 165 166 if ((sdata->vif.type != NL80211_IFTYPE_AP) || 167 !(sdata->local->hw.flags & IEEE80211_HW_QUEUE_CONTROL)) { 168 sdata->vif.cab_queue = IEEE80211_INVAL_HW_QUEUE; 169 return 0; 170 } 171 172 if (WARN_ON_ONCE(sdata->vif.cab_queue == IEEE80211_INVAL_HW_QUEUE)) 173 return -EINVAL; 174 175 if (WARN_ON_ONCE(sdata->vif.cab_queue >= n_queues)) 176 return -EINVAL; 177 178 return 0; 179 } 180 181 void ieee80211_adjust_monitor_flags(struct ieee80211_sub_if_data *sdata, 182 const int offset) 183 { 184 struct ieee80211_local *local = sdata->local; 185 u32 flags = sdata->u.mntr_flags; 186 187 #define ADJUST(_f, _s) do { \ 188 if (flags & MONITOR_FLAG_##_f) \ 189 local->fif_##_s += offset; \ 190 } while (0) 191 192 ADJUST(FCSFAIL, fcsfail); 193 ADJUST(PLCPFAIL, plcpfail); 194 ADJUST(CONTROL, control); 195 ADJUST(CONTROL, pspoll); 196 ADJUST(OTHER_BSS, other_bss); 197 198 #undef ADJUST 199 } 200 201 static void ieee80211_set_default_queues(struct ieee80211_sub_if_data *sdata) 202 { 203 struct ieee80211_local *local = sdata->local; 204 int i; 205 206 for (i = 0; i < IEEE80211_NUM_ACS; i++) { 207 if (local->hw.flags & IEEE80211_HW_QUEUE_CONTROL) 208 sdata->vif.hw_queue[i] = IEEE80211_INVAL_HW_QUEUE; 209 else 210 sdata->vif.hw_queue[i] = i; 211 } 212 sdata->vif.cab_queue = IEEE80211_INVAL_HW_QUEUE; 213 } 214 215 static int ieee80211_add_virtual_monitor(struct ieee80211_local *local) 216 { 217 struct ieee80211_sub_if_data *sdata; 218 int ret; 219 220 if (!(local->hw.flags & IEEE80211_HW_WANT_MONITOR_VIF)) 221 return 0; 222 223 if (local->monitor_sdata) 224 return 0; 225 226 sdata = kzalloc(sizeof(*sdata) + local->hw.vif_data_size, GFP_KERNEL); 227 if (!sdata) 228 return -ENOMEM; 229 230 /* set up data */ 231 sdata->local = local; 232 sdata->vif.type = NL80211_IFTYPE_MONITOR; 233 snprintf(sdata->name, IFNAMSIZ, "%s-monitor", 234 wiphy_name(local->hw.wiphy)); 235 236 ieee80211_set_default_queues(sdata); 237 238 ret = drv_add_interface(local, sdata); 239 if (WARN_ON(ret)) { 240 /* ok .. stupid driver, it asked for this! */ 241 kfree(sdata); 242 return ret; 243 } 244 245 ret = ieee80211_check_queues(sdata); 246 if (ret) { 247 kfree(sdata); 248 return ret; 249 } 250 251 rcu_assign_pointer(local->monitor_sdata, sdata); 252 253 return 0; 254 } 255 256 static void ieee80211_del_virtual_monitor(struct ieee80211_local *local) 257 { 258 struct ieee80211_sub_if_data *sdata; 259 260 if (!(local->hw.flags & IEEE80211_HW_WANT_MONITOR_VIF)) 261 return; 262 263 sdata = rtnl_dereference(local->monitor_sdata); 264 265 if (!sdata) 266 return; 267 268 rcu_assign_pointer(local->monitor_sdata, NULL); 269 synchronize_net(); 270 271 drv_remove_interface(local, sdata); 272 273 kfree(sdata); 274 } 275 276 /* 277 * NOTE: Be very careful when changing this function, it must NOT return 278 * an error on interface type changes that have been pre-checked, so most 279 * checks should be in ieee80211_check_concurrent_iface. 280 */ 281 static int ieee80211_do_open(struct net_device *dev, bool coming_up) 282 { 283 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); 284 struct ieee80211_local *local = sdata->local; 285 struct sta_info *sta; 286 u32 changed = 0; 287 int res; 288 u32 hw_reconf_flags = 0; 289 290 switch (sdata->vif.type) { 291 case NL80211_IFTYPE_WDS: 292 if (!is_valid_ether_addr(sdata->u.wds.remote_addr)) 293 return -ENOLINK; 294 break; 295 case NL80211_IFTYPE_AP_VLAN: { 296 struct ieee80211_sub_if_data *master; 297 298 if (!sdata->bss) 299 return -ENOLINK; 300 301 list_add(&sdata->u.vlan.list, &sdata->bss->vlans); 302 303 master = container_of(sdata->bss, 304 struct ieee80211_sub_if_data, u.ap); 305 sdata->control_port_protocol = 306 master->control_port_protocol; 307 sdata->control_port_no_encrypt = 308 master->control_port_no_encrypt; 309 break; 310 } 311 case NL80211_IFTYPE_AP: 312 sdata->bss = &sdata->u.ap; 313 break; 314 case NL80211_IFTYPE_MESH_POINT: 315 case NL80211_IFTYPE_STATION: 316 case NL80211_IFTYPE_MONITOR: 317 case NL80211_IFTYPE_ADHOC: 318 /* no special treatment */ 319 break; 320 case NL80211_IFTYPE_UNSPECIFIED: 321 case NUM_NL80211_IFTYPES: 322 case NL80211_IFTYPE_P2P_CLIENT: 323 case NL80211_IFTYPE_P2P_GO: 324 /* cannot happen */ 325 WARN_ON(1); 326 break; 327 } 328 329 if (local->open_count == 0) { 330 res = drv_start(local); 331 if (res) 332 goto err_del_bss; 333 if (local->ops->napi_poll) 334 napi_enable(&local->napi); 335 /* we're brought up, everything changes */ 336 hw_reconf_flags = ~0; 337 ieee80211_led_radio(local, true); 338 ieee80211_mod_tpt_led_trig(local, 339 IEEE80211_TPT_LEDTRIG_FL_RADIO, 0); 340 } 341 342 /* 343 * Copy the hopefully now-present MAC address to 344 * this interface, if it has the special null one. 345 */ 346 if (is_zero_ether_addr(dev->dev_addr)) { 347 memcpy(dev->dev_addr, 348 local->hw.wiphy->perm_addr, 349 ETH_ALEN); 350 memcpy(dev->perm_addr, dev->dev_addr, ETH_ALEN); 351 352 if (!is_valid_ether_addr(dev->dev_addr)) { 353 res = -EADDRNOTAVAIL; 354 goto err_stop; 355 } 356 } 357 358 switch (sdata->vif.type) { 359 case NL80211_IFTYPE_AP_VLAN: 360 /* no need to tell driver, but set carrier */ 361 if (rtnl_dereference(sdata->bss->beacon)) 362 netif_carrier_on(dev); 363 else 364 netif_carrier_off(dev); 365 break; 366 case NL80211_IFTYPE_MONITOR: 367 if (sdata->u.mntr_flags & MONITOR_FLAG_COOK_FRAMES) { 368 local->cooked_mntrs++; 369 break; 370 } 371 372 if (local->monitors == 0 && local->open_count == 0) { 373 res = ieee80211_add_virtual_monitor(local); 374 if (res) 375 goto err_stop; 376 } 377 378 /* must be before the call to ieee80211_configure_filter */ 379 local->monitors++; 380 if (local->monitors == 1) { 381 local->hw.conf.flags |= IEEE80211_CONF_MONITOR; 382 hw_reconf_flags |= IEEE80211_CONF_CHANGE_MONITOR; 383 } 384 385 ieee80211_adjust_monitor_flags(sdata, 1); 386 ieee80211_configure_filter(local); 387 388 netif_carrier_on(dev); 389 break; 390 default: 391 if (coming_up) { 392 ieee80211_del_virtual_monitor(local); 393 394 res = drv_add_interface(local, sdata); 395 if (res) 396 goto err_stop; 397 res = ieee80211_check_queues(sdata); 398 if (res) 399 goto err_del_interface; 400 } 401 402 if (sdata->vif.type == NL80211_IFTYPE_AP) { 403 local->fif_pspoll++; 404 local->fif_probe_req++; 405 406 ieee80211_configure_filter(local); 407 } else if (sdata->vif.type == NL80211_IFTYPE_ADHOC) { 408 local->fif_probe_req++; 409 } 410 411 changed |= ieee80211_reset_erp_info(sdata); 412 ieee80211_bss_info_change_notify(sdata, changed); 413 414 if (sdata->vif.type == NL80211_IFTYPE_STATION || 415 sdata->vif.type == NL80211_IFTYPE_ADHOC || 416 sdata->vif.type == NL80211_IFTYPE_AP) 417 netif_carrier_off(dev); 418 else 419 netif_carrier_on(dev); 420 421 /* 422 * set default queue parameters so drivers don't 423 * need to initialise the hardware if the hardware 424 * doesn't start up with sane defaults 425 */ 426 ieee80211_set_wmm_default(sdata, true); 427 } 428 429 set_bit(SDATA_STATE_RUNNING, &sdata->state); 430 431 if (sdata->vif.type == NL80211_IFTYPE_WDS) { 432 /* Create STA entry for the WDS peer */ 433 sta = sta_info_alloc(sdata, sdata->u.wds.remote_addr, 434 GFP_KERNEL); 435 if (!sta) { 436 res = -ENOMEM; 437 goto err_del_interface; 438 } 439 440 sta_info_pre_move_state(sta, IEEE80211_STA_AUTH); 441 sta_info_pre_move_state(sta, IEEE80211_STA_ASSOC); 442 sta_info_pre_move_state(sta, IEEE80211_STA_AUTHORIZED); 443 444 res = sta_info_insert(sta); 445 if (res) { 446 /* STA has been freed */ 447 goto err_del_interface; 448 } 449 450 rate_control_rate_init(sta); 451 } 452 453 /* 454 * set_multicast_list will be invoked by the networking core 455 * which will check whether any increments here were done in 456 * error and sync them down to the hardware as filter flags. 457 */ 458 if (sdata->flags & IEEE80211_SDATA_ALLMULTI) 459 atomic_inc(&local->iff_allmultis); 460 461 if (sdata->flags & IEEE80211_SDATA_PROMISC) 462 atomic_inc(&local->iff_promiscs); 463 464 mutex_lock(&local->mtx); 465 hw_reconf_flags |= __ieee80211_recalc_idle(local); 466 mutex_unlock(&local->mtx); 467 468 if (coming_up) 469 local->open_count++; 470 471 if (hw_reconf_flags) 472 ieee80211_hw_config(local, hw_reconf_flags); 473 474 ieee80211_recalc_ps(local, -1); 475 476 netif_tx_start_all_queues(dev); 477 478 return 0; 479 err_del_interface: 480 drv_remove_interface(local, sdata); 481 err_stop: 482 if (!local->open_count) 483 drv_stop(local); 484 err_del_bss: 485 sdata->bss = NULL; 486 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) 487 list_del(&sdata->u.vlan.list); 488 /* might already be clear but that doesn't matter */ 489 clear_bit(SDATA_STATE_RUNNING, &sdata->state); 490 return res; 491 } 492 493 static int ieee80211_open(struct net_device *dev) 494 { 495 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); 496 int err; 497 498 /* fail early if user set an invalid address */ 499 if (!is_valid_ether_addr(dev->dev_addr)) 500 return -EADDRNOTAVAIL; 501 502 err = ieee80211_check_concurrent_iface(sdata, sdata->vif.type); 503 if (err) 504 return err; 505 506 return ieee80211_do_open(dev, true); 507 } 508 509 static void ieee80211_do_stop(struct ieee80211_sub_if_data *sdata, 510 bool going_down) 511 { 512 struct ieee80211_local *local = sdata->local; 513 unsigned long flags; 514 struct sk_buff *skb, *tmp; 515 u32 hw_reconf_flags = 0; 516 int i; 517 enum nl80211_channel_type orig_ct; 518 519 clear_bit(SDATA_STATE_RUNNING, &sdata->state); 520 521 if (local->scan_sdata == sdata) 522 ieee80211_scan_cancel(local); 523 524 /* 525 * Stop TX on this interface first. 526 */ 527 netif_tx_stop_all_queues(sdata->dev); 528 529 /* 530 * Purge work for this interface. 531 */ 532 ieee80211_work_purge(sdata); 533 534 /* 535 * Remove all stations associated with this interface. 536 * 537 * This must be done before calling ops->remove_interface() 538 * because otherwise we can later invoke ops->sta_notify() 539 * whenever the STAs are removed, and that invalidates driver 540 * assumptions about always getting a vif pointer that is valid 541 * (because if we remove a STA after ops->remove_interface() 542 * the driver will have removed the vif info already!) 543 * 544 * This is relevant only in AP, WDS and mesh modes, since in 545 * all other modes we've already removed all stations when 546 * disconnecting etc. 547 */ 548 sta_info_flush(local, sdata); 549 550 /* 551 * Don't count this interface for promisc/allmulti while it 552 * is down. dev_mc_unsync() will invoke set_multicast_list 553 * on the master interface which will sync these down to the 554 * hardware as filter flags. 555 */ 556 if (sdata->flags & IEEE80211_SDATA_ALLMULTI) 557 atomic_dec(&local->iff_allmultis); 558 559 if (sdata->flags & IEEE80211_SDATA_PROMISC) 560 atomic_dec(&local->iff_promiscs); 561 562 if (sdata->vif.type == NL80211_IFTYPE_AP) { 563 local->fif_pspoll--; 564 local->fif_probe_req--; 565 } else if (sdata->vif.type == NL80211_IFTYPE_ADHOC) { 566 local->fif_probe_req--; 567 } 568 569 netif_addr_lock_bh(sdata->dev); 570 spin_lock_bh(&local->filter_lock); 571 __hw_addr_unsync(&local->mc_list, &sdata->dev->mc, 572 sdata->dev->addr_len); 573 spin_unlock_bh(&local->filter_lock); 574 netif_addr_unlock_bh(sdata->dev); 575 576 ieee80211_configure_filter(local); 577 578 del_timer_sync(&local->dynamic_ps_timer); 579 cancel_work_sync(&local->dynamic_ps_enable_work); 580 581 /* APs need special treatment */ 582 if (sdata->vif.type == NL80211_IFTYPE_AP) { 583 struct ieee80211_sub_if_data *vlan, *tmpsdata; 584 struct beacon_data *old_beacon = 585 rtnl_dereference(sdata->u.ap.beacon); 586 struct sk_buff *old_probe_resp = 587 rtnl_dereference(sdata->u.ap.probe_resp); 588 589 /* sdata_running will return false, so this will disable */ 590 ieee80211_bss_info_change_notify(sdata, 591 BSS_CHANGED_BEACON_ENABLED); 592 593 /* remove beacon and probe response */ 594 RCU_INIT_POINTER(sdata->u.ap.beacon, NULL); 595 RCU_INIT_POINTER(sdata->u.ap.probe_resp, NULL); 596 synchronize_rcu(); 597 kfree(old_beacon); 598 kfree_skb(old_probe_resp); 599 600 /* down all dependent devices, that is VLANs */ 601 list_for_each_entry_safe(vlan, tmpsdata, &sdata->u.ap.vlans, 602 u.vlan.list) 603 dev_close(vlan->dev); 604 WARN_ON(!list_empty(&sdata->u.ap.vlans)); 605 606 /* free all potentially still buffered bcast frames */ 607 local->total_ps_buffered -= skb_queue_len(&sdata->u.ap.ps_bc_buf); 608 skb_queue_purge(&sdata->u.ap.ps_bc_buf); 609 } else if (sdata->vif.type == NL80211_IFTYPE_STATION) { 610 ieee80211_mgd_stop(sdata); 611 } 612 613 if (going_down) 614 local->open_count--; 615 616 switch (sdata->vif.type) { 617 case NL80211_IFTYPE_AP_VLAN: 618 list_del(&sdata->u.vlan.list); 619 /* no need to tell driver */ 620 break; 621 case NL80211_IFTYPE_MONITOR: 622 if (sdata->u.mntr_flags & MONITOR_FLAG_COOK_FRAMES) { 623 local->cooked_mntrs--; 624 break; 625 } 626 627 local->monitors--; 628 if (local->monitors == 0) { 629 local->hw.conf.flags &= ~IEEE80211_CONF_MONITOR; 630 hw_reconf_flags |= IEEE80211_CONF_CHANGE_MONITOR; 631 ieee80211_del_virtual_monitor(local); 632 } 633 634 ieee80211_adjust_monitor_flags(sdata, -1); 635 ieee80211_configure_filter(local); 636 break; 637 default: 638 flush_work(&sdata->work); 639 /* 640 * When we get here, the interface is marked down. 641 * Call synchronize_rcu() to wait for the RX path 642 * should it be using the interface and enqueuing 643 * frames at this very time on another CPU. 644 */ 645 synchronize_rcu(); 646 skb_queue_purge(&sdata->skb_queue); 647 648 /* 649 * Disable beaconing here for mesh only, AP and IBSS 650 * are already taken care of. 651 */ 652 if (sdata->vif.type == NL80211_IFTYPE_MESH_POINT) 653 ieee80211_bss_info_change_notify(sdata, 654 BSS_CHANGED_BEACON_ENABLED); 655 656 /* 657 * Free all remaining keys, there shouldn't be any, 658 * except maybe group keys in AP more or WDS? 659 */ 660 ieee80211_free_keys(sdata); 661 662 if (going_down) 663 drv_remove_interface(local, sdata); 664 } 665 666 sdata->bss = NULL; 667 668 mutex_lock(&local->mtx); 669 hw_reconf_flags |= __ieee80211_recalc_idle(local); 670 mutex_unlock(&local->mtx); 671 672 ieee80211_recalc_ps(local, -1); 673 674 if (local->open_count == 0) { 675 if (local->ops->napi_poll) 676 napi_disable(&local->napi); 677 ieee80211_clear_tx_pending(local); 678 ieee80211_stop_device(local); 679 680 /* no reconfiguring after stop! */ 681 hw_reconf_flags = 0; 682 } 683 684 /* Re-calculate channel-type, in case there are multiple vifs 685 * on different channel types. 686 */ 687 orig_ct = local->_oper_channel_type; 688 ieee80211_set_channel_type(local, NULL, NL80211_CHAN_NO_HT); 689 690 /* do after stop to avoid reconfiguring when we stop anyway */ 691 if (hw_reconf_flags || (orig_ct != local->_oper_channel_type)) 692 ieee80211_hw_config(local, hw_reconf_flags); 693 694 spin_lock_irqsave(&local->queue_stop_reason_lock, flags); 695 for (i = 0; i < IEEE80211_MAX_QUEUES; i++) { 696 skb_queue_walk_safe(&local->pending[i], skb, tmp) { 697 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); 698 if (info->control.vif == &sdata->vif) { 699 __skb_unlink(skb, &local->pending[i]); 700 dev_kfree_skb_irq(skb); 701 } 702 } 703 } 704 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); 705 706 if (local->monitors == local->open_count && local->monitors > 0) 707 ieee80211_add_virtual_monitor(local); 708 } 709 710 static int ieee80211_stop(struct net_device *dev) 711 { 712 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); 713 714 ieee80211_do_stop(sdata, true); 715 716 return 0; 717 } 718 719 static void ieee80211_set_multicast_list(struct net_device *dev) 720 { 721 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); 722 struct ieee80211_local *local = sdata->local; 723 int allmulti, promisc, sdata_allmulti, sdata_promisc; 724 725 allmulti = !!(dev->flags & IFF_ALLMULTI); 726 promisc = !!(dev->flags & IFF_PROMISC); 727 sdata_allmulti = !!(sdata->flags & IEEE80211_SDATA_ALLMULTI); 728 sdata_promisc = !!(sdata->flags & IEEE80211_SDATA_PROMISC); 729 730 if (allmulti != sdata_allmulti) { 731 if (dev->flags & IFF_ALLMULTI) 732 atomic_inc(&local->iff_allmultis); 733 else 734 atomic_dec(&local->iff_allmultis); 735 sdata->flags ^= IEEE80211_SDATA_ALLMULTI; 736 } 737 738 if (promisc != sdata_promisc) { 739 if (dev->flags & IFF_PROMISC) 740 atomic_inc(&local->iff_promiscs); 741 else 742 atomic_dec(&local->iff_promiscs); 743 sdata->flags ^= IEEE80211_SDATA_PROMISC; 744 } 745 spin_lock_bh(&local->filter_lock); 746 __hw_addr_sync(&local->mc_list, &dev->mc, dev->addr_len); 747 spin_unlock_bh(&local->filter_lock); 748 ieee80211_queue_work(&local->hw, &local->reconfig_filter); 749 } 750 751 /* 752 * Called when the netdev is removed or, by the code below, before 753 * the interface type changes. 754 */ 755 static void ieee80211_teardown_sdata(struct net_device *dev) 756 { 757 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); 758 struct ieee80211_local *local = sdata->local; 759 int flushed; 760 int i; 761 762 /* free extra data */ 763 ieee80211_free_keys(sdata); 764 765 ieee80211_debugfs_remove_netdev(sdata); 766 767 for (i = 0; i < IEEE80211_FRAGMENT_MAX; i++) 768 __skb_queue_purge(&sdata->fragments[i].skb_list); 769 sdata->fragment_next = 0; 770 771 if (ieee80211_vif_is_mesh(&sdata->vif)) 772 mesh_rmc_free(sdata); 773 774 flushed = sta_info_flush(local, sdata); 775 WARN_ON(flushed); 776 } 777 778 static u16 ieee80211_netdev_select_queue(struct net_device *dev, 779 struct sk_buff *skb) 780 { 781 return ieee80211_select_queue(IEEE80211_DEV_TO_SUB_IF(dev), skb); 782 } 783 784 static const struct net_device_ops ieee80211_dataif_ops = { 785 .ndo_open = ieee80211_open, 786 .ndo_stop = ieee80211_stop, 787 .ndo_uninit = ieee80211_teardown_sdata, 788 .ndo_start_xmit = ieee80211_subif_start_xmit, 789 .ndo_set_rx_mode = ieee80211_set_multicast_list, 790 .ndo_change_mtu = ieee80211_change_mtu, 791 .ndo_set_mac_address = ieee80211_change_mac, 792 .ndo_select_queue = ieee80211_netdev_select_queue, 793 }; 794 795 static u16 ieee80211_monitor_select_queue(struct net_device *dev, 796 struct sk_buff *skb) 797 { 798 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); 799 struct ieee80211_local *local = sdata->local; 800 struct ieee80211_hdr *hdr; 801 struct ieee80211_radiotap_header *rtap = (void *)skb->data; 802 803 if (local->hw.queues < IEEE80211_NUM_ACS) 804 return 0; 805 806 if (skb->len < 4 || 807 skb->len < le16_to_cpu(rtap->it_len) + 2 /* frame control */) 808 return 0; /* doesn't matter, frame will be dropped */ 809 810 hdr = (void *)((u8 *)skb->data + le16_to_cpu(rtap->it_len)); 811 812 return ieee80211_select_queue_80211(local, skb, hdr); 813 } 814 815 static const struct net_device_ops ieee80211_monitorif_ops = { 816 .ndo_open = ieee80211_open, 817 .ndo_stop = ieee80211_stop, 818 .ndo_uninit = ieee80211_teardown_sdata, 819 .ndo_start_xmit = ieee80211_monitor_start_xmit, 820 .ndo_set_rx_mode = ieee80211_set_multicast_list, 821 .ndo_change_mtu = ieee80211_change_mtu, 822 .ndo_set_mac_address = eth_mac_addr, 823 .ndo_select_queue = ieee80211_monitor_select_queue, 824 }; 825 826 static void ieee80211_if_setup(struct net_device *dev) 827 { 828 ether_setup(dev); 829 dev->priv_flags &= ~IFF_TX_SKB_SHARING; 830 dev->netdev_ops = &ieee80211_dataif_ops; 831 dev->destructor = free_netdev; 832 } 833 834 static void ieee80211_iface_work(struct work_struct *work) 835 { 836 struct ieee80211_sub_if_data *sdata = 837 container_of(work, struct ieee80211_sub_if_data, work); 838 struct ieee80211_local *local = sdata->local; 839 struct sk_buff *skb; 840 struct sta_info *sta; 841 struct ieee80211_ra_tid *ra_tid; 842 843 if (!ieee80211_sdata_running(sdata)) 844 return; 845 846 if (local->scanning) 847 return; 848 849 /* 850 * ieee80211_queue_work() should have picked up most cases, 851 * here we'll pick the rest. 852 */ 853 if (WARN(local->suspended, 854 "interface work scheduled while going to suspend\n")) 855 return; 856 857 /* first process frames */ 858 while ((skb = skb_dequeue(&sdata->skb_queue))) { 859 struct ieee80211_mgmt *mgmt = (void *)skb->data; 860 861 if (skb->pkt_type == IEEE80211_SDATA_QUEUE_AGG_START) { 862 ra_tid = (void *)&skb->cb; 863 ieee80211_start_tx_ba_cb(&sdata->vif, ra_tid->ra, 864 ra_tid->tid); 865 } else if (skb->pkt_type == IEEE80211_SDATA_QUEUE_AGG_STOP) { 866 ra_tid = (void *)&skb->cb; 867 ieee80211_stop_tx_ba_cb(&sdata->vif, ra_tid->ra, 868 ra_tid->tid); 869 } else if (ieee80211_is_action(mgmt->frame_control) && 870 mgmt->u.action.category == WLAN_CATEGORY_BACK) { 871 int len = skb->len; 872 873 mutex_lock(&local->sta_mtx); 874 sta = sta_info_get_bss(sdata, mgmt->sa); 875 if (sta) { 876 switch (mgmt->u.action.u.addba_req.action_code) { 877 case WLAN_ACTION_ADDBA_REQ: 878 ieee80211_process_addba_request( 879 local, sta, mgmt, len); 880 break; 881 case WLAN_ACTION_ADDBA_RESP: 882 ieee80211_process_addba_resp(local, sta, 883 mgmt, len); 884 break; 885 case WLAN_ACTION_DELBA: 886 ieee80211_process_delba(sdata, sta, 887 mgmt, len); 888 break; 889 default: 890 WARN_ON(1); 891 break; 892 } 893 } 894 mutex_unlock(&local->sta_mtx); 895 } else if (ieee80211_is_data_qos(mgmt->frame_control)) { 896 struct ieee80211_hdr *hdr = (void *)mgmt; 897 /* 898 * So the frame isn't mgmt, but frame_control 899 * is at the right place anyway, of course, so 900 * the if statement is correct. 901 * 902 * Warn if we have other data frame types here, 903 * they must not get here. 904 */ 905 WARN_ON(hdr->frame_control & 906 cpu_to_le16(IEEE80211_STYPE_NULLFUNC)); 907 WARN_ON(!(hdr->seq_ctrl & 908 cpu_to_le16(IEEE80211_SCTL_FRAG))); 909 /* 910 * This was a fragment of a frame, received while 911 * a block-ack session was active. That cannot be 912 * right, so terminate the session. 913 */ 914 mutex_lock(&local->sta_mtx); 915 sta = sta_info_get_bss(sdata, mgmt->sa); 916 if (sta) { 917 u16 tid = *ieee80211_get_qos_ctl(hdr) & 918 IEEE80211_QOS_CTL_TID_MASK; 919 920 __ieee80211_stop_rx_ba_session( 921 sta, tid, WLAN_BACK_RECIPIENT, 922 WLAN_REASON_QSTA_REQUIRE_SETUP, 923 true); 924 } 925 mutex_unlock(&local->sta_mtx); 926 } else switch (sdata->vif.type) { 927 case NL80211_IFTYPE_STATION: 928 ieee80211_sta_rx_queued_mgmt(sdata, skb); 929 break; 930 case NL80211_IFTYPE_ADHOC: 931 ieee80211_ibss_rx_queued_mgmt(sdata, skb); 932 break; 933 case NL80211_IFTYPE_MESH_POINT: 934 if (!ieee80211_vif_is_mesh(&sdata->vif)) 935 break; 936 ieee80211_mesh_rx_queued_mgmt(sdata, skb); 937 break; 938 default: 939 WARN(1, "frame for unexpected interface type"); 940 break; 941 } 942 943 kfree_skb(skb); 944 } 945 946 /* then other type-dependent work */ 947 switch (sdata->vif.type) { 948 case NL80211_IFTYPE_STATION: 949 ieee80211_sta_work(sdata); 950 break; 951 case NL80211_IFTYPE_ADHOC: 952 ieee80211_ibss_work(sdata); 953 break; 954 case NL80211_IFTYPE_MESH_POINT: 955 if (!ieee80211_vif_is_mesh(&sdata->vif)) 956 break; 957 ieee80211_mesh_work(sdata); 958 break; 959 default: 960 break; 961 } 962 } 963 964 965 /* 966 * Helper function to initialise an interface to a specific type. 967 */ 968 static void ieee80211_setup_sdata(struct ieee80211_sub_if_data *sdata, 969 enum nl80211_iftype type) 970 { 971 /* clear type-dependent union */ 972 memset(&sdata->u, 0, sizeof(sdata->u)); 973 974 /* and set some type-dependent values */ 975 sdata->vif.type = type; 976 sdata->vif.p2p = false; 977 sdata->dev->netdev_ops = &ieee80211_dataif_ops; 978 sdata->wdev.iftype = type; 979 980 sdata->control_port_protocol = cpu_to_be16(ETH_P_PAE); 981 sdata->control_port_no_encrypt = false; 982 983 sdata->noack_map = 0; 984 985 /* only monitor differs */ 986 sdata->dev->type = ARPHRD_ETHER; 987 988 skb_queue_head_init(&sdata->skb_queue); 989 INIT_WORK(&sdata->work, ieee80211_iface_work); 990 991 switch (type) { 992 case NL80211_IFTYPE_P2P_GO: 993 type = NL80211_IFTYPE_AP; 994 sdata->vif.type = type; 995 sdata->vif.p2p = true; 996 /* fall through */ 997 case NL80211_IFTYPE_AP: 998 skb_queue_head_init(&sdata->u.ap.ps_bc_buf); 999 INIT_LIST_HEAD(&sdata->u.ap.vlans); 1000 break; 1001 case NL80211_IFTYPE_P2P_CLIENT: 1002 type = NL80211_IFTYPE_STATION; 1003 sdata->vif.type = type; 1004 sdata->vif.p2p = true; 1005 /* fall through */ 1006 case NL80211_IFTYPE_STATION: 1007 ieee80211_sta_setup_sdata(sdata); 1008 break; 1009 case NL80211_IFTYPE_ADHOC: 1010 ieee80211_ibss_setup_sdata(sdata); 1011 break; 1012 case NL80211_IFTYPE_MESH_POINT: 1013 if (ieee80211_vif_is_mesh(&sdata->vif)) 1014 ieee80211_mesh_init_sdata(sdata); 1015 break; 1016 case NL80211_IFTYPE_MONITOR: 1017 sdata->dev->type = ARPHRD_IEEE80211_RADIOTAP; 1018 sdata->dev->netdev_ops = &ieee80211_monitorif_ops; 1019 sdata->u.mntr_flags = MONITOR_FLAG_CONTROL | 1020 MONITOR_FLAG_OTHER_BSS; 1021 break; 1022 case NL80211_IFTYPE_WDS: 1023 case NL80211_IFTYPE_AP_VLAN: 1024 break; 1025 case NL80211_IFTYPE_UNSPECIFIED: 1026 case NUM_NL80211_IFTYPES: 1027 BUG(); 1028 break; 1029 } 1030 1031 ieee80211_debugfs_add_netdev(sdata); 1032 } 1033 1034 static void ieee80211_clean_sdata(struct ieee80211_sub_if_data *sdata) 1035 { 1036 switch (sdata->vif.type) { 1037 case NL80211_IFTYPE_MESH_POINT: 1038 mesh_path_flush_by_iface(sdata); 1039 break; 1040 1041 default: 1042 break; 1043 } 1044 } 1045 1046 static int ieee80211_runtime_change_iftype(struct ieee80211_sub_if_data *sdata, 1047 enum nl80211_iftype type) 1048 { 1049 struct ieee80211_local *local = sdata->local; 1050 int ret, err; 1051 enum nl80211_iftype internal_type = type; 1052 bool p2p = false; 1053 1054 ASSERT_RTNL(); 1055 1056 if (!local->ops->change_interface) 1057 return -EBUSY; 1058 1059 switch (sdata->vif.type) { 1060 case NL80211_IFTYPE_AP: 1061 case NL80211_IFTYPE_STATION: 1062 case NL80211_IFTYPE_ADHOC: 1063 /* 1064 * Could maybe also all others here? 1065 * Just not sure how that interacts 1066 * with the RX/config path e.g. for 1067 * mesh. 1068 */ 1069 break; 1070 default: 1071 return -EBUSY; 1072 } 1073 1074 switch (type) { 1075 case NL80211_IFTYPE_AP: 1076 case NL80211_IFTYPE_STATION: 1077 case NL80211_IFTYPE_ADHOC: 1078 /* 1079 * Could probably support everything 1080 * but WDS here (WDS do_open can fail 1081 * under memory pressure, which this 1082 * code isn't prepared to handle). 1083 */ 1084 break; 1085 case NL80211_IFTYPE_P2P_CLIENT: 1086 p2p = true; 1087 internal_type = NL80211_IFTYPE_STATION; 1088 break; 1089 case NL80211_IFTYPE_P2P_GO: 1090 p2p = true; 1091 internal_type = NL80211_IFTYPE_AP; 1092 break; 1093 default: 1094 return -EBUSY; 1095 } 1096 1097 ret = ieee80211_check_concurrent_iface(sdata, internal_type); 1098 if (ret) 1099 return ret; 1100 1101 ieee80211_do_stop(sdata, false); 1102 1103 ieee80211_teardown_sdata(sdata->dev); 1104 1105 ret = drv_change_interface(local, sdata, internal_type, p2p); 1106 if (ret) 1107 type = sdata->vif.type; 1108 1109 /* 1110 * Ignore return value here, there's not much we can do since 1111 * the driver changed the interface type internally already. 1112 * The warnings will hopefully make driver authors fix it :-) 1113 */ 1114 ieee80211_check_queues(sdata); 1115 1116 ieee80211_setup_sdata(sdata, type); 1117 1118 err = ieee80211_do_open(sdata->dev, false); 1119 WARN(err, "type change: do_open returned %d", err); 1120 1121 return ret; 1122 } 1123 1124 int ieee80211_if_change_type(struct ieee80211_sub_if_data *sdata, 1125 enum nl80211_iftype type) 1126 { 1127 int ret; 1128 1129 ASSERT_RTNL(); 1130 1131 if (type == ieee80211_vif_type_p2p(&sdata->vif)) 1132 return 0; 1133 1134 /* Setting ad-hoc mode on non-IBSS channel is not supported. */ 1135 if (sdata->local->oper_channel->flags & IEEE80211_CHAN_NO_IBSS && 1136 type == NL80211_IFTYPE_ADHOC) 1137 return -EOPNOTSUPP; 1138 1139 if (ieee80211_sdata_running(sdata)) { 1140 ret = ieee80211_runtime_change_iftype(sdata, type); 1141 if (ret) 1142 return ret; 1143 } else { 1144 /* Purge and reset type-dependent state. */ 1145 ieee80211_teardown_sdata(sdata->dev); 1146 ieee80211_setup_sdata(sdata, type); 1147 } 1148 1149 /* reset some values that shouldn't be kept across type changes */ 1150 sdata->vif.bss_conf.basic_rates = 1151 ieee80211_mandatory_rates(sdata->local, 1152 sdata->local->hw.conf.channel->band); 1153 sdata->drop_unencrypted = 0; 1154 if (type == NL80211_IFTYPE_STATION) 1155 sdata->u.mgd.use_4addr = false; 1156 1157 return 0; 1158 } 1159 1160 static void ieee80211_assign_perm_addr(struct ieee80211_local *local, 1161 struct net_device *dev, 1162 enum nl80211_iftype type) 1163 { 1164 struct ieee80211_sub_if_data *sdata; 1165 u64 mask, start, addr, val, inc; 1166 u8 *m; 1167 u8 tmp_addr[ETH_ALEN]; 1168 int i; 1169 1170 /* default ... something at least */ 1171 memcpy(dev->perm_addr, local->hw.wiphy->perm_addr, ETH_ALEN); 1172 1173 if (is_zero_ether_addr(local->hw.wiphy->addr_mask) && 1174 local->hw.wiphy->n_addresses <= 1) 1175 return; 1176 1177 1178 mutex_lock(&local->iflist_mtx); 1179 1180 switch (type) { 1181 case NL80211_IFTYPE_MONITOR: 1182 /* doesn't matter */ 1183 break; 1184 case NL80211_IFTYPE_WDS: 1185 case NL80211_IFTYPE_AP_VLAN: 1186 /* match up with an AP interface */ 1187 list_for_each_entry(sdata, &local->interfaces, list) { 1188 if (sdata->vif.type != NL80211_IFTYPE_AP) 1189 continue; 1190 memcpy(dev->perm_addr, sdata->vif.addr, ETH_ALEN); 1191 break; 1192 } 1193 /* keep default if no AP interface present */ 1194 break; 1195 default: 1196 /* assign a new address if possible -- try n_addresses first */ 1197 for (i = 0; i < local->hw.wiphy->n_addresses; i++) { 1198 bool used = false; 1199 1200 list_for_each_entry(sdata, &local->interfaces, list) { 1201 if (memcmp(local->hw.wiphy->addresses[i].addr, 1202 sdata->vif.addr, ETH_ALEN) == 0) { 1203 used = true; 1204 break; 1205 } 1206 } 1207 1208 if (!used) { 1209 memcpy(dev->perm_addr, 1210 local->hw.wiphy->addresses[i].addr, 1211 ETH_ALEN); 1212 break; 1213 } 1214 } 1215 1216 /* try mask if available */ 1217 if (is_zero_ether_addr(local->hw.wiphy->addr_mask)) 1218 break; 1219 1220 m = local->hw.wiphy->addr_mask; 1221 mask = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) | 1222 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) | 1223 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8); 1224 1225 if (__ffs64(mask) + hweight64(mask) != fls64(mask)) { 1226 /* not a contiguous mask ... not handled now! */ 1227 printk(KERN_DEBUG "not contiguous\n"); 1228 break; 1229 } 1230 1231 m = local->hw.wiphy->perm_addr; 1232 start = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) | 1233 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) | 1234 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8); 1235 1236 inc = 1ULL<<__ffs64(mask); 1237 val = (start & mask); 1238 addr = (start & ~mask) | (val & mask); 1239 do { 1240 bool used = false; 1241 1242 tmp_addr[5] = addr >> 0*8; 1243 tmp_addr[4] = addr >> 1*8; 1244 tmp_addr[3] = addr >> 2*8; 1245 tmp_addr[2] = addr >> 3*8; 1246 tmp_addr[1] = addr >> 4*8; 1247 tmp_addr[0] = addr >> 5*8; 1248 1249 val += inc; 1250 1251 list_for_each_entry(sdata, &local->interfaces, list) { 1252 if (memcmp(tmp_addr, sdata->vif.addr, 1253 ETH_ALEN) == 0) { 1254 used = true; 1255 break; 1256 } 1257 } 1258 1259 if (!used) { 1260 memcpy(dev->perm_addr, tmp_addr, ETH_ALEN); 1261 break; 1262 } 1263 addr = (start & ~mask) | (val & mask); 1264 } while (addr != start); 1265 1266 break; 1267 } 1268 1269 mutex_unlock(&local->iflist_mtx); 1270 } 1271 1272 int ieee80211_if_add(struct ieee80211_local *local, const char *name, 1273 struct net_device **new_dev, enum nl80211_iftype type, 1274 struct vif_params *params) 1275 { 1276 struct net_device *ndev; 1277 struct ieee80211_sub_if_data *sdata = NULL; 1278 int ret, i; 1279 int txqs = 1; 1280 1281 ASSERT_RTNL(); 1282 1283 if (local->hw.queues >= IEEE80211_NUM_ACS) 1284 txqs = IEEE80211_NUM_ACS; 1285 1286 ndev = alloc_netdev_mqs(sizeof(*sdata) + local->hw.vif_data_size, 1287 name, ieee80211_if_setup, txqs, 1); 1288 if (!ndev) 1289 return -ENOMEM; 1290 dev_net_set(ndev, wiphy_net(local->hw.wiphy)); 1291 1292 ndev->needed_headroom = local->tx_headroom + 1293 4*6 /* four MAC addresses */ 1294 + 2 + 2 + 2 + 2 /* ctl, dur, seq, qos */ 1295 + 6 /* mesh */ 1296 + 8 /* rfc1042/bridge tunnel */ 1297 - ETH_HLEN /* ethernet hard_header_len */ 1298 + IEEE80211_ENCRYPT_HEADROOM; 1299 ndev->needed_tailroom = IEEE80211_ENCRYPT_TAILROOM; 1300 1301 ret = dev_alloc_name(ndev, ndev->name); 1302 if (ret < 0) 1303 goto fail; 1304 1305 ieee80211_assign_perm_addr(local, ndev, type); 1306 memcpy(ndev->dev_addr, ndev->perm_addr, ETH_ALEN); 1307 SET_NETDEV_DEV(ndev, wiphy_dev(local->hw.wiphy)); 1308 1309 /* don't use IEEE80211_DEV_TO_SUB_IF because it checks too much */ 1310 sdata = netdev_priv(ndev); 1311 ndev->ieee80211_ptr = &sdata->wdev; 1312 memcpy(sdata->vif.addr, ndev->dev_addr, ETH_ALEN); 1313 memcpy(sdata->name, ndev->name, IFNAMSIZ); 1314 1315 /* initialise type-independent data */ 1316 sdata->wdev.wiphy = local->hw.wiphy; 1317 sdata->local = local; 1318 sdata->dev = ndev; 1319 #ifdef CONFIG_INET 1320 sdata->arp_filter_state = true; 1321 #endif 1322 1323 for (i = 0; i < IEEE80211_FRAGMENT_MAX; i++) 1324 skb_queue_head_init(&sdata->fragments[i].skb_list); 1325 1326 INIT_LIST_HEAD(&sdata->key_list); 1327 1328 for (i = 0; i < IEEE80211_NUM_BANDS; i++) { 1329 struct ieee80211_supported_band *sband; 1330 sband = local->hw.wiphy->bands[i]; 1331 sdata->rc_rateidx_mask[i] = 1332 sband ? (1 << sband->n_bitrates) - 1 : 0; 1333 if (sband) 1334 memcpy(sdata->rc_rateidx_mcs_mask[i], 1335 sband->ht_cap.mcs.rx_mask, 1336 sizeof(sdata->rc_rateidx_mcs_mask[i])); 1337 else 1338 memset(sdata->rc_rateidx_mcs_mask[i], 0, 1339 sizeof(sdata->rc_rateidx_mcs_mask[i])); 1340 } 1341 1342 ieee80211_set_default_queues(sdata); 1343 1344 /* setup type-dependent data */ 1345 ieee80211_setup_sdata(sdata, type); 1346 1347 if (params) { 1348 ndev->ieee80211_ptr->use_4addr = params->use_4addr; 1349 if (type == NL80211_IFTYPE_STATION) 1350 sdata->u.mgd.use_4addr = params->use_4addr; 1351 } 1352 1353 ret = register_netdevice(ndev); 1354 if (ret) 1355 goto fail; 1356 1357 mutex_lock(&local->iflist_mtx); 1358 list_add_tail_rcu(&sdata->list, &local->interfaces); 1359 mutex_unlock(&local->iflist_mtx); 1360 1361 if (new_dev) 1362 *new_dev = ndev; 1363 1364 return 0; 1365 1366 fail: 1367 free_netdev(ndev); 1368 return ret; 1369 } 1370 1371 void ieee80211_if_remove(struct ieee80211_sub_if_data *sdata) 1372 { 1373 ASSERT_RTNL(); 1374 1375 mutex_lock(&sdata->local->iflist_mtx); 1376 list_del_rcu(&sdata->list); 1377 mutex_unlock(&sdata->local->iflist_mtx); 1378 1379 /* clean up type-dependent data */ 1380 ieee80211_clean_sdata(sdata); 1381 1382 synchronize_rcu(); 1383 unregister_netdevice(sdata->dev); 1384 } 1385 1386 /* 1387 * Remove all interfaces, may only be called at hardware unregistration 1388 * time because it doesn't do RCU-safe list removals. 1389 */ 1390 void ieee80211_remove_interfaces(struct ieee80211_local *local) 1391 { 1392 struct ieee80211_sub_if_data *sdata, *tmp; 1393 LIST_HEAD(unreg_list); 1394 1395 ASSERT_RTNL(); 1396 1397 mutex_lock(&local->iflist_mtx); 1398 list_for_each_entry_safe(sdata, tmp, &local->interfaces, list) { 1399 list_del(&sdata->list); 1400 1401 ieee80211_clean_sdata(sdata); 1402 1403 unregister_netdevice_queue(sdata->dev, &unreg_list); 1404 } 1405 mutex_unlock(&local->iflist_mtx); 1406 unregister_netdevice_many(&unreg_list); 1407 list_del(&unreg_list); 1408 } 1409 1410 static u32 ieee80211_idle_off(struct ieee80211_local *local, 1411 const char *reason) 1412 { 1413 if (!(local->hw.conf.flags & IEEE80211_CONF_IDLE)) 1414 return 0; 1415 1416 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG 1417 wiphy_debug(local->hw.wiphy, "device no longer idle - %s\n", reason); 1418 #endif 1419 1420 local->hw.conf.flags &= ~IEEE80211_CONF_IDLE; 1421 return IEEE80211_CONF_CHANGE_IDLE; 1422 } 1423 1424 static u32 ieee80211_idle_on(struct ieee80211_local *local) 1425 { 1426 if (local->hw.conf.flags & IEEE80211_CONF_IDLE) 1427 return 0; 1428 1429 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG 1430 wiphy_debug(local->hw.wiphy, "device now idle\n"); 1431 #endif 1432 1433 drv_flush(local, false); 1434 1435 local->hw.conf.flags |= IEEE80211_CONF_IDLE; 1436 return IEEE80211_CONF_CHANGE_IDLE; 1437 } 1438 1439 u32 __ieee80211_recalc_idle(struct ieee80211_local *local) 1440 { 1441 struct ieee80211_sub_if_data *sdata; 1442 int count = 0; 1443 bool working = false, scanning = false, hw_roc = false; 1444 struct ieee80211_work *wk; 1445 unsigned int led_trig_start = 0, led_trig_stop = 0; 1446 1447 #ifdef CONFIG_PROVE_LOCKING 1448 WARN_ON(debug_locks && !lockdep_rtnl_is_held() && 1449 !lockdep_is_held(&local->iflist_mtx)); 1450 #endif 1451 lockdep_assert_held(&local->mtx); 1452 1453 list_for_each_entry(sdata, &local->interfaces, list) { 1454 if (!ieee80211_sdata_running(sdata)) { 1455 sdata->vif.bss_conf.idle = true; 1456 continue; 1457 } 1458 1459 sdata->old_idle = sdata->vif.bss_conf.idle; 1460 1461 /* do not count disabled managed interfaces */ 1462 if (sdata->vif.type == NL80211_IFTYPE_STATION && 1463 !sdata->u.mgd.associated && 1464 !sdata->u.mgd.auth_data && 1465 !sdata->u.mgd.assoc_data) { 1466 sdata->vif.bss_conf.idle = true; 1467 continue; 1468 } 1469 /* do not count unused IBSS interfaces */ 1470 if (sdata->vif.type == NL80211_IFTYPE_ADHOC && 1471 !sdata->u.ibss.ssid_len) { 1472 sdata->vif.bss_conf.idle = true; 1473 continue; 1474 } 1475 /* count everything else */ 1476 sdata->vif.bss_conf.idle = false; 1477 count++; 1478 } 1479 1480 list_for_each_entry(wk, &local->work_list, list) { 1481 working = true; 1482 wk->sdata->vif.bss_conf.idle = false; 1483 } 1484 1485 if (local->scan_sdata && 1486 !(local->hw.flags & IEEE80211_HW_SCAN_WHILE_IDLE)) { 1487 scanning = true; 1488 local->scan_sdata->vif.bss_conf.idle = false; 1489 } 1490 1491 if (local->hw_roc_channel) 1492 hw_roc = true; 1493 1494 list_for_each_entry(sdata, &local->interfaces, list) { 1495 if (sdata->vif.type == NL80211_IFTYPE_MONITOR || 1496 sdata->vif.type == NL80211_IFTYPE_AP_VLAN) 1497 continue; 1498 if (sdata->old_idle == sdata->vif.bss_conf.idle) 1499 continue; 1500 if (!ieee80211_sdata_running(sdata)) 1501 continue; 1502 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_IDLE); 1503 } 1504 1505 if (working || scanning || hw_roc) 1506 led_trig_start |= IEEE80211_TPT_LEDTRIG_FL_WORK; 1507 else 1508 led_trig_stop |= IEEE80211_TPT_LEDTRIG_FL_WORK; 1509 1510 if (count) 1511 led_trig_start |= IEEE80211_TPT_LEDTRIG_FL_CONNECTED; 1512 else 1513 led_trig_stop |= IEEE80211_TPT_LEDTRIG_FL_CONNECTED; 1514 1515 ieee80211_mod_tpt_led_trig(local, led_trig_start, led_trig_stop); 1516 1517 if (hw_roc) 1518 return ieee80211_idle_off(local, "hw remain-on-channel"); 1519 if (working) 1520 return ieee80211_idle_off(local, "working"); 1521 if (scanning) 1522 return ieee80211_idle_off(local, "scanning"); 1523 if (!count) 1524 return ieee80211_idle_on(local); 1525 else 1526 return ieee80211_idle_off(local, "in use"); 1527 1528 return 0; 1529 } 1530 1531 void ieee80211_recalc_idle(struct ieee80211_local *local) 1532 { 1533 u32 chg; 1534 1535 mutex_lock(&local->iflist_mtx); 1536 chg = __ieee80211_recalc_idle(local); 1537 mutex_unlock(&local->iflist_mtx); 1538 if (chg) 1539 ieee80211_hw_config(local, chg); 1540 } 1541 1542 static int netdev_notify(struct notifier_block *nb, 1543 unsigned long state, 1544 void *ndev) 1545 { 1546 struct net_device *dev = ndev; 1547 struct ieee80211_sub_if_data *sdata; 1548 1549 if (state != NETDEV_CHANGENAME) 1550 return 0; 1551 1552 if (!dev->ieee80211_ptr || !dev->ieee80211_ptr->wiphy) 1553 return 0; 1554 1555 if (dev->ieee80211_ptr->wiphy->privid != mac80211_wiphy_privid) 1556 return 0; 1557 1558 sdata = IEEE80211_DEV_TO_SUB_IF(dev); 1559 1560 memcpy(sdata->name, dev->name, IFNAMSIZ); 1561 1562 ieee80211_debugfs_rename_netdev(sdata); 1563 return 0; 1564 } 1565 1566 static struct notifier_block mac80211_netdev_notifier = { 1567 .notifier_call = netdev_notify, 1568 }; 1569 1570 int ieee80211_iface_init(void) 1571 { 1572 return register_netdevice_notifier(&mac80211_netdev_notifier); 1573 } 1574 1575 void ieee80211_iface_exit(void) 1576 { 1577 unregister_netdevice_notifier(&mac80211_netdev_notifier); 1578 } 1579