1 /* 2 * Copyright 2002-2005, Instant802 Networks, Inc. 3 * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz> 4 * Copyright 2013-2014 Intel Mobile Communications GmbH 5 * Copyright (C) 2015 - 2017 Intel Deutschland GmbH 6 * Copyright (C) 2018 Intel Corporation 7 * 8 * This program is free software; you can redistribute it and/or modify 9 * it under the terms of the GNU General Public License version 2 as 10 * published by the Free Software Foundation. 11 */ 12 13 #include <linux/module.h> 14 #include <linux/init.h> 15 #include <linux/etherdevice.h> 16 #include <linux/netdevice.h> 17 #include <linux/types.h> 18 #include <linux/slab.h> 19 #include <linux/skbuff.h> 20 #include <linux/if_arp.h> 21 #include <linux/timer.h> 22 #include <linux/rtnetlink.h> 23 24 #include <net/codel.h> 25 #include <net/mac80211.h> 26 #include "ieee80211_i.h" 27 #include "driver-ops.h" 28 #include "rate.h" 29 #include "sta_info.h" 30 #include "debugfs_sta.h" 31 #include "mesh.h" 32 #include "wme.h" 33 34 /** 35 * DOC: STA information lifetime rules 36 * 37 * STA info structures (&struct sta_info) are managed in a hash table 38 * for faster lookup and a list for iteration. They are managed using 39 * RCU, i.e. access to the list and hash table is protected by RCU. 40 * 41 * Upon allocating a STA info structure with sta_info_alloc(), the caller 42 * owns that structure. It must then insert it into the hash table using 43 * either sta_info_insert() or sta_info_insert_rcu(); only in the latter 44 * case (which acquires an rcu read section but must not be called from 45 * within one) will the pointer still be valid after the call. Note that 46 * the caller may not do much with the STA info before inserting it, in 47 * particular, it may not start any mesh peer link management or add 48 * encryption keys. 49 * 50 * When the insertion fails (sta_info_insert()) returns non-zero), the 51 * structure will have been freed by sta_info_insert()! 52 * 53 * Station entries are added by mac80211 when you establish a link with a 54 * peer. This means different things for the different type of interfaces 55 * we support. For a regular station this mean we add the AP sta when we 56 * receive an association response from the AP. For IBSS this occurs when 57 * get to know about a peer on the same IBSS. For WDS we add the sta for 58 * the peer immediately upon device open. When using AP mode we add stations 59 * for each respective station upon request from userspace through nl80211. 60 * 61 * In order to remove a STA info structure, various sta_info_destroy_*() 62 * calls are available. 63 * 64 * There is no concept of ownership on a STA entry, each structure is 65 * owned by the global hash table/list until it is removed. All users of 66 * the structure need to be RCU protected so that the structure won't be 67 * freed before they are done using it. 68 */ 69 70 static const struct rhashtable_params sta_rht_params = { 71 .nelem_hint = 3, /* start small */ 72 .automatic_shrinking = true, 73 .head_offset = offsetof(struct sta_info, hash_node), 74 .key_offset = offsetof(struct sta_info, addr), 75 .key_len = ETH_ALEN, 76 .max_size = CONFIG_MAC80211_STA_HASH_MAX_SIZE, 77 }; 78 79 /* Caller must hold local->sta_mtx */ 80 static int sta_info_hash_del(struct ieee80211_local *local, 81 struct sta_info *sta) 82 { 83 return rhltable_remove(&local->sta_hash, &sta->hash_node, 84 sta_rht_params); 85 } 86 87 static void __cleanup_single_sta(struct sta_info *sta) 88 { 89 int ac, i; 90 struct tid_ampdu_tx *tid_tx; 91 struct ieee80211_sub_if_data *sdata = sta->sdata; 92 struct ieee80211_local *local = sdata->local; 93 struct ps_data *ps; 94 95 if (test_sta_flag(sta, WLAN_STA_PS_STA) || 96 test_sta_flag(sta, WLAN_STA_PS_DRIVER) || 97 test_sta_flag(sta, WLAN_STA_PS_DELIVER)) { 98 if (sta->sdata->vif.type == NL80211_IFTYPE_AP || 99 sta->sdata->vif.type == NL80211_IFTYPE_AP_VLAN) 100 ps = &sdata->bss->ps; 101 else if (ieee80211_vif_is_mesh(&sdata->vif)) 102 ps = &sdata->u.mesh.ps; 103 else 104 return; 105 106 clear_sta_flag(sta, WLAN_STA_PS_STA); 107 clear_sta_flag(sta, WLAN_STA_PS_DRIVER); 108 clear_sta_flag(sta, WLAN_STA_PS_DELIVER); 109 110 atomic_dec(&ps->num_sta_ps); 111 } 112 113 if (sta->sta.txq[0]) { 114 for (i = 0; i < ARRAY_SIZE(sta->sta.txq); i++) { 115 struct txq_info *txqi; 116 117 if (!sta->sta.txq[i]) 118 continue; 119 120 txqi = to_txq_info(sta->sta.txq[i]); 121 122 ieee80211_txq_purge(local, txqi); 123 } 124 } 125 126 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) { 127 local->total_ps_buffered -= skb_queue_len(&sta->ps_tx_buf[ac]); 128 ieee80211_purge_tx_queue(&local->hw, &sta->ps_tx_buf[ac]); 129 ieee80211_purge_tx_queue(&local->hw, &sta->tx_filtered[ac]); 130 } 131 132 if (ieee80211_vif_is_mesh(&sdata->vif)) 133 mesh_sta_cleanup(sta); 134 135 cancel_work_sync(&sta->drv_deliver_wk); 136 137 /* 138 * Destroy aggregation state here. It would be nice to wait for the 139 * driver to finish aggregation stop and then clean up, but for now 140 * drivers have to handle aggregation stop being requested, followed 141 * directly by station destruction. 142 */ 143 for (i = 0; i < IEEE80211_NUM_TIDS; i++) { 144 kfree(sta->ampdu_mlme.tid_start_tx[i]); 145 tid_tx = rcu_dereference_raw(sta->ampdu_mlme.tid_tx[i]); 146 if (!tid_tx) 147 continue; 148 ieee80211_purge_tx_queue(&local->hw, &tid_tx->pending); 149 kfree(tid_tx); 150 } 151 } 152 153 static void cleanup_single_sta(struct sta_info *sta) 154 { 155 struct ieee80211_sub_if_data *sdata = sta->sdata; 156 struct ieee80211_local *local = sdata->local; 157 158 __cleanup_single_sta(sta); 159 sta_info_free(local, sta); 160 } 161 162 struct rhlist_head *sta_info_hash_lookup(struct ieee80211_local *local, 163 const u8 *addr) 164 { 165 return rhltable_lookup(&local->sta_hash, addr, sta_rht_params); 166 } 167 168 /* protected by RCU */ 169 struct sta_info *sta_info_get(struct ieee80211_sub_if_data *sdata, 170 const u8 *addr) 171 { 172 struct ieee80211_local *local = sdata->local; 173 struct rhlist_head *tmp; 174 struct sta_info *sta; 175 176 rcu_read_lock(); 177 for_each_sta_info(local, addr, sta, tmp) { 178 if (sta->sdata == sdata) { 179 rcu_read_unlock(); 180 /* this is safe as the caller must already hold 181 * another rcu read section or the mutex 182 */ 183 return sta; 184 } 185 } 186 rcu_read_unlock(); 187 return NULL; 188 } 189 190 /* 191 * Get sta info either from the specified interface 192 * or from one of its vlans 193 */ 194 struct sta_info *sta_info_get_bss(struct ieee80211_sub_if_data *sdata, 195 const u8 *addr) 196 { 197 struct ieee80211_local *local = sdata->local; 198 struct rhlist_head *tmp; 199 struct sta_info *sta; 200 201 rcu_read_lock(); 202 for_each_sta_info(local, addr, sta, tmp) { 203 if (sta->sdata == sdata || 204 (sta->sdata->bss && sta->sdata->bss == sdata->bss)) { 205 rcu_read_unlock(); 206 /* this is safe as the caller must already hold 207 * another rcu read section or the mutex 208 */ 209 return sta; 210 } 211 } 212 rcu_read_unlock(); 213 return NULL; 214 } 215 216 struct sta_info *sta_info_get_by_idx(struct ieee80211_sub_if_data *sdata, 217 int idx) 218 { 219 struct ieee80211_local *local = sdata->local; 220 struct sta_info *sta; 221 int i = 0; 222 223 list_for_each_entry_rcu(sta, &local->sta_list, list) { 224 if (sdata != sta->sdata) 225 continue; 226 if (i < idx) { 227 ++i; 228 continue; 229 } 230 return sta; 231 } 232 233 return NULL; 234 } 235 236 /** 237 * sta_info_free - free STA 238 * 239 * @local: pointer to the global information 240 * @sta: STA info to free 241 * 242 * This function must undo everything done by sta_info_alloc() 243 * that may happen before sta_info_insert(). It may only be 244 * called when sta_info_insert() has not been attempted (and 245 * if that fails, the station is freed anyway.) 246 */ 247 void sta_info_free(struct ieee80211_local *local, struct sta_info *sta) 248 { 249 if (sta->rate_ctrl) 250 rate_control_free_sta(sta); 251 252 sta_dbg(sta->sdata, "Destroyed STA %pM\n", sta->sta.addr); 253 254 if (sta->sta.txq[0]) 255 kfree(to_txq_info(sta->sta.txq[0])); 256 kfree(rcu_dereference_raw(sta->sta.rates)); 257 #ifdef CONFIG_MAC80211_MESH 258 kfree(sta->mesh); 259 #endif 260 free_percpu(sta->pcpu_rx_stats); 261 kfree(sta); 262 } 263 264 /* Caller must hold local->sta_mtx */ 265 static int sta_info_hash_add(struct ieee80211_local *local, 266 struct sta_info *sta) 267 { 268 return rhltable_insert(&local->sta_hash, &sta->hash_node, 269 sta_rht_params); 270 } 271 272 static void sta_deliver_ps_frames(struct work_struct *wk) 273 { 274 struct sta_info *sta; 275 276 sta = container_of(wk, struct sta_info, drv_deliver_wk); 277 278 if (sta->dead) 279 return; 280 281 local_bh_disable(); 282 if (!test_sta_flag(sta, WLAN_STA_PS_STA)) 283 ieee80211_sta_ps_deliver_wakeup(sta); 284 else if (test_and_clear_sta_flag(sta, WLAN_STA_PSPOLL)) 285 ieee80211_sta_ps_deliver_poll_response(sta); 286 else if (test_and_clear_sta_flag(sta, WLAN_STA_UAPSD)) 287 ieee80211_sta_ps_deliver_uapsd(sta); 288 local_bh_enable(); 289 } 290 291 static int sta_prepare_rate_control(struct ieee80211_local *local, 292 struct sta_info *sta, gfp_t gfp) 293 { 294 if (ieee80211_hw_check(&local->hw, HAS_RATE_CONTROL)) 295 return 0; 296 297 sta->rate_ctrl = local->rate_ctrl; 298 sta->rate_ctrl_priv = rate_control_alloc_sta(sta->rate_ctrl, 299 sta, gfp); 300 if (!sta->rate_ctrl_priv) 301 return -ENOMEM; 302 303 return 0; 304 } 305 306 struct sta_info *sta_info_alloc(struct ieee80211_sub_if_data *sdata, 307 const u8 *addr, gfp_t gfp) 308 { 309 struct ieee80211_local *local = sdata->local; 310 struct ieee80211_hw *hw = &local->hw; 311 struct sta_info *sta; 312 int i; 313 314 sta = kzalloc(sizeof(*sta) + hw->sta_data_size, gfp); 315 if (!sta) 316 return NULL; 317 318 if (ieee80211_hw_check(hw, USES_RSS)) { 319 sta->pcpu_rx_stats = 320 alloc_percpu_gfp(struct ieee80211_sta_rx_stats, gfp); 321 if (!sta->pcpu_rx_stats) 322 goto free; 323 } 324 325 spin_lock_init(&sta->lock); 326 spin_lock_init(&sta->ps_lock); 327 INIT_WORK(&sta->drv_deliver_wk, sta_deliver_ps_frames); 328 INIT_WORK(&sta->ampdu_mlme.work, ieee80211_ba_session_work); 329 mutex_init(&sta->ampdu_mlme.mtx); 330 #ifdef CONFIG_MAC80211_MESH 331 if (ieee80211_vif_is_mesh(&sdata->vif)) { 332 sta->mesh = kzalloc(sizeof(*sta->mesh), gfp); 333 if (!sta->mesh) 334 goto free; 335 sta->mesh->plink_sta = sta; 336 spin_lock_init(&sta->mesh->plink_lock); 337 if (ieee80211_vif_is_mesh(&sdata->vif) && 338 !sdata->u.mesh.user_mpm) 339 timer_setup(&sta->mesh->plink_timer, mesh_plink_timer, 340 0); 341 sta->mesh->nonpeer_pm = NL80211_MESH_POWER_ACTIVE; 342 } 343 #endif 344 345 memcpy(sta->addr, addr, ETH_ALEN); 346 memcpy(sta->sta.addr, addr, ETH_ALEN); 347 sta->sta.max_rx_aggregation_subframes = 348 local->hw.max_rx_aggregation_subframes; 349 350 /* Extended Key ID needs to install keys for keyid 0 and 1 Rx-only. 351 * The Tx path starts to use a key as soon as the key slot ptk_idx 352 * references to is not NULL. To not use the initial Rx-only key 353 * prematurely for Tx initialize ptk_idx to an impossible PTK keyid 354 * which always will refer to a NULL key. 355 */ 356 BUILD_BUG_ON(ARRAY_SIZE(sta->ptk) <= INVALID_PTK_KEYIDX); 357 sta->ptk_idx = INVALID_PTK_KEYIDX; 358 359 sta->local = local; 360 sta->sdata = sdata; 361 sta->rx_stats.last_rx = jiffies; 362 363 u64_stats_init(&sta->rx_stats.syncp); 364 365 sta->sta_state = IEEE80211_STA_NONE; 366 367 /* Mark TID as unreserved */ 368 sta->reserved_tid = IEEE80211_TID_UNRESERVED; 369 370 sta->last_connected = ktime_get_seconds(); 371 ewma_signal_init(&sta->rx_stats_avg.signal); 372 ewma_avg_signal_init(&sta->status_stats.avg_ack_signal); 373 for (i = 0; i < ARRAY_SIZE(sta->rx_stats_avg.chain_signal); i++) 374 ewma_signal_init(&sta->rx_stats_avg.chain_signal[i]); 375 376 if (local->ops->wake_tx_queue) { 377 void *txq_data; 378 int size = sizeof(struct txq_info) + 379 ALIGN(hw->txq_data_size, sizeof(void *)); 380 381 txq_data = kcalloc(ARRAY_SIZE(sta->sta.txq), size, gfp); 382 if (!txq_data) 383 goto free; 384 385 for (i = 0; i < ARRAY_SIZE(sta->sta.txq); i++) { 386 struct txq_info *txq = txq_data + i * size; 387 388 /* might not do anything for the bufferable MMPDU TXQ */ 389 ieee80211_txq_init(sdata, sta, txq, i); 390 } 391 } 392 393 if (sta_prepare_rate_control(local, sta, gfp)) 394 goto free_txq; 395 396 sta->airtime_weight = IEEE80211_DEFAULT_AIRTIME_WEIGHT; 397 398 for (i = 0; i < IEEE80211_NUM_ACS; i++) { 399 skb_queue_head_init(&sta->ps_tx_buf[i]); 400 skb_queue_head_init(&sta->tx_filtered[i]); 401 sta->airtime[i].deficit = sta->airtime_weight; 402 } 403 404 for (i = 0; i < IEEE80211_NUM_TIDS; i++) 405 sta->last_seq_ctrl[i] = cpu_to_le16(USHRT_MAX); 406 407 sta->sta.smps_mode = IEEE80211_SMPS_OFF; 408 if (sdata->vif.type == NL80211_IFTYPE_AP || 409 sdata->vif.type == NL80211_IFTYPE_AP_VLAN) { 410 struct ieee80211_supported_band *sband; 411 u8 smps; 412 413 sband = ieee80211_get_sband(sdata); 414 if (!sband) 415 goto free_txq; 416 417 smps = (sband->ht_cap.cap & IEEE80211_HT_CAP_SM_PS) >> 418 IEEE80211_HT_CAP_SM_PS_SHIFT; 419 /* 420 * Assume that hostapd advertises our caps in the beacon and 421 * this is the known_smps_mode for a station that just assciated 422 */ 423 switch (smps) { 424 case WLAN_HT_SMPS_CONTROL_DISABLED: 425 sta->known_smps_mode = IEEE80211_SMPS_OFF; 426 break; 427 case WLAN_HT_SMPS_CONTROL_STATIC: 428 sta->known_smps_mode = IEEE80211_SMPS_STATIC; 429 break; 430 case WLAN_HT_SMPS_CONTROL_DYNAMIC: 431 sta->known_smps_mode = IEEE80211_SMPS_DYNAMIC; 432 break; 433 default: 434 WARN_ON(1); 435 } 436 } 437 438 sta->sta.max_rc_amsdu_len = IEEE80211_MAX_MPDU_LEN_HT_BA; 439 440 sta->cparams.ce_threshold = CODEL_DISABLED_THRESHOLD; 441 sta->cparams.target = MS2TIME(20); 442 sta->cparams.interval = MS2TIME(100); 443 sta->cparams.ecn = true; 444 445 sta_dbg(sdata, "Allocated STA %pM\n", sta->sta.addr); 446 447 return sta; 448 449 free_txq: 450 if (sta->sta.txq[0]) 451 kfree(to_txq_info(sta->sta.txq[0])); 452 free: 453 free_percpu(sta->pcpu_rx_stats); 454 #ifdef CONFIG_MAC80211_MESH 455 kfree(sta->mesh); 456 #endif 457 kfree(sta); 458 return NULL; 459 } 460 461 static int sta_info_insert_check(struct sta_info *sta) 462 { 463 struct ieee80211_sub_if_data *sdata = sta->sdata; 464 465 /* 466 * Can't be a WARN_ON because it can be triggered through a race: 467 * something inserts a STA (on one CPU) without holding the RTNL 468 * and another CPU turns off the net device. 469 */ 470 if (unlikely(!ieee80211_sdata_running(sdata))) 471 return -ENETDOWN; 472 473 if (WARN_ON(ether_addr_equal(sta->sta.addr, sdata->vif.addr) || 474 is_multicast_ether_addr(sta->sta.addr))) 475 return -EINVAL; 476 477 /* The RCU read lock is required by rhashtable due to 478 * asynchronous resize/rehash. We also require the mutex 479 * for correctness. 480 */ 481 rcu_read_lock(); 482 lockdep_assert_held(&sdata->local->sta_mtx); 483 if (ieee80211_hw_check(&sdata->local->hw, NEEDS_UNIQUE_STA_ADDR) && 484 ieee80211_find_sta_by_ifaddr(&sdata->local->hw, sta->addr, NULL)) { 485 rcu_read_unlock(); 486 return -ENOTUNIQ; 487 } 488 rcu_read_unlock(); 489 490 return 0; 491 } 492 493 static int sta_info_insert_drv_state(struct ieee80211_local *local, 494 struct ieee80211_sub_if_data *sdata, 495 struct sta_info *sta) 496 { 497 enum ieee80211_sta_state state; 498 int err = 0; 499 500 for (state = IEEE80211_STA_NOTEXIST; state < sta->sta_state; state++) { 501 err = drv_sta_state(local, sdata, sta, state, state + 1); 502 if (err) 503 break; 504 } 505 506 if (!err) { 507 /* 508 * Drivers using legacy sta_add/sta_remove callbacks only 509 * get uploaded set to true after sta_add is called. 510 */ 511 if (!local->ops->sta_add) 512 sta->uploaded = true; 513 return 0; 514 } 515 516 if (sdata->vif.type == NL80211_IFTYPE_ADHOC) { 517 sdata_info(sdata, 518 "failed to move IBSS STA %pM to state %d (%d) - keeping it anyway\n", 519 sta->sta.addr, state + 1, err); 520 err = 0; 521 } 522 523 /* unwind on error */ 524 for (; state > IEEE80211_STA_NOTEXIST; state--) 525 WARN_ON(drv_sta_state(local, sdata, sta, state, state - 1)); 526 527 return err; 528 } 529 530 static void 531 ieee80211_recalc_p2p_go_ps_allowed(struct ieee80211_sub_if_data *sdata) 532 { 533 struct ieee80211_local *local = sdata->local; 534 bool allow_p2p_go_ps = sdata->vif.p2p; 535 struct sta_info *sta; 536 537 rcu_read_lock(); 538 list_for_each_entry_rcu(sta, &local->sta_list, list) { 539 if (sdata != sta->sdata || 540 !test_sta_flag(sta, WLAN_STA_ASSOC)) 541 continue; 542 if (!sta->sta.support_p2p_ps) { 543 allow_p2p_go_ps = false; 544 break; 545 } 546 } 547 rcu_read_unlock(); 548 549 if (allow_p2p_go_ps != sdata->vif.bss_conf.allow_p2p_go_ps) { 550 sdata->vif.bss_conf.allow_p2p_go_ps = allow_p2p_go_ps; 551 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_P2P_PS); 552 } 553 } 554 555 /* 556 * should be called with sta_mtx locked 557 * this function replaces the mutex lock 558 * with a RCU lock 559 */ 560 static int sta_info_insert_finish(struct sta_info *sta) __acquires(RCU) 561 { 562 struct ieee80211_local *local = sta->local; 563 struct ieee80211_sub_if_data *sdata = sta->sdata; 564 struct station_info *sinfo = NULL; 565 int err = 0; 566 567 lockdep_assert_held(&local->sta_mtx); 568 569 /* check if STA exists already */ 570 if (sta_info_get_bss(sdata, sta->sta.addr)) { 571 err = -EEXIST; 572 goto out_err; 573 } 574 575 sinfo = kzalloc(sizeof(struct station_info), GFP_KERNEL); 576 if (!sinfo) { 577 err = -ENOMEM; 578 goto out_err; 579 } 580 581 local->num_sta++; 582 local->sta_generation++; 583 smp_mb(); 584 585 /* simplify things and don't accept BA sessions yet */ 586 set_sta_flag(sta, WLAN_STA_BLOCK_BA); 587 588 /* make the station visible */ 589 err = sta_info_hash_add(local, sta); 590 if (err) 591 goto out_drop_sta; 592 593 list_add_tail_rcu(&sta->list, &local->sta_list); 594 595 /* notify driver */ 596 err = sta_info_insert_drv_state(local, sdata, sta); 597 if (err) 598 goto out_remove; 599 600 set_sta_flag(sta, WLAN_STA_INSERTED); 601 602 if (sta->sta_state >= IEEE80211_STA_ASSOC) { 603 ieee80211_recalc_min_chandef(sta->sdata); 604 if (!sta->sta.support_p2p_ps) 605 ieee80211_recalc_p2p_go_ps_allowed(sta->sdata); 606 } 607 608 /* accept BA sessions now */ 609 clear_sta_flag(sta, WLAN_STA_BLOCK_BA); 610 611 ieee80211_sta_debugfs_add(sta); 612 rate_control_add_sta_debugfs(sta); 613 614 sinfo->generation = local->sta_generation; 615 cfg80211_new_sta(sdata->dev, sta->sta.addr, sinfo, GFP_KERNEL); 616 kfree(sinfo); 617 618 sta_dbg(sdata, "Inserted STA %pM\n", sta->sta.addr); 619 620 /* move reference to rcu-protected */ 621 rcu_read_lock(); 622 mutex_unlock(&local->sta_mtx); 623 624 if (ieee80211_vif_is_mesh(&sdata->vif)) 625 mesh_accept_plinks_update(sdata); 626 627 return 0; 628 out_remove: 629 sta_info_hash_del(local, sta); 630 list_del_rcu(&sta->list); 631 out_drop_sta: 632 local->num_sta--; 633 synchronize_net(); 634 __cleanup_single_sta(sta); 635 out_err: 636 mutex_unlock(&local->sta_mtx); 637 kfree(sinfo); 638 rcu_read_lock(); 639 return err; 640 } 641 642 int sta_info_insert_rcu(struct sta_info *sta) __acquires(RCU) 643 { 644 struct ieee80211_local *local = sta->local; 645 int err; 646 647 might_sleep(); 648 649 mutex_lock(&local->sta_mtx); 650 651 err = sta_info_insert_check(sta); 652 if (err) { 653 mutex_unlock(&local->sta_mtx); 654 rcu_read_lock(); 655 goto out_free; 656 } 657 658 err = sta_info_insert_finish(sta); 659 if (err) 660 goto out_free; 661 662 return 0; 663 out_free: 664 sta_info_free(local, sta); 665 return err; 666 } 667 668 int sta_info_insert(struct sta_info *sta) 669 { 670 int err = sta_info_insert_rcu(sta); 671 672 rcu_read_unlock(); 673 674 return err; 675 } 676 677 static inline void __bss_tim_set(u8 *tim, u16 id) 678 { 679 /* 680 * This format has been mandated by the IEEE specifications, 681 * so this line may not be changed to use the __set_bit() format. 682 */ 683 tim[id / 8] |= (1 << (id % 8)); 684 } 685 686 static inline void __bss_tim_clear(u8 *tim, u16 id) 687 { 688 /* 689 * This format has been mandated by the IEEE specifications, 690 * so this line may not be changed to use the __clear_bit() format. 691 */ 692 tim[id / 8] &= ~(1 << (id % 8)); 693 } 694 695 static inline bool __bss_tim_get(u8 *tim, u16 id) 696 { 697 /* 698 * This format has been mandated by the IEEE specifications, 699 * so this line may not be changed to use the test_bit() format. 700 */ 701 return tim[id / 8] & (1 << (id % 8)); 702 } 703 704 static unsigned long ieee80211_tids_for_ac(int ac) 705 { 706 /* If we ever support TIDs > 7, this obviously needs to be adjusted */ 707 switch (ac) { 708 case IEEE80211_AC_VO: 709 return BIT(6) | BIT(7); 710 case IEEE80211_AC_VI: 711 return BIT(4) | BIT(5); 712 case IEEE80211_AC_BE: 713 return BIT(0) | BIT(3); 714 case IEEE80211_AC_BK: 715 return BIT(1) | BIT(2); 716 default: 717 WARN_ON(1); 718 return 0; 719 } 720 } 721 722 static void __sta_info_recalc_tim(struct sta_info *sta, bool ignore_pending) 723 { 724 struct ieee80211_local *local = sta->local; 725 struct ps_data *ps; 726 bool indicate_tim = false; 727 u8 ignore_for_tim = sta->sta.uapsd_queues; 728 int ac; 729 u16 id = sta->sta.aid; 730 731 if (sta->sdata->vif.type == NL80211_IFTYPE_AP || 732 sta->sdata->vif.type == NL80211_IFTYPE_AP_VLAN) { 733 if (WARN_ON_ONCE(!sta->sdata->bss)) 734 return; 735 736 ps = &sta->sdata->bss->ps; 737 #ifdef CONFIG_MAC80211_MESH 738 } else if (ieee80211_vif_is_mesh(&sta->sdata->vif)) { 739 ps = &sta->sdata->u.mesh.ps; 740 #endif 741 } else { 742 return; 743 } 744 745 /* No need to do anything if the driver does all */ 746 if (ieee80211_hw_check(&local->hw, AP_LINK_PS) && !local->ops->set_tim) 747 return; 748 749 if (sta->dead) 750 goto done; 751 752 /* 753 * If all ACs are delivery-enabled then we should build 754 * the TIM bit for all ACs anyway; if only some are then 755 * we ignore those and build the TIM bit using only the 756 * non-enabled ones. 757 */ 758 if (ignore_for_tim == BIT(IEEE80211_NUM_ACS) - 1) 759 ignore_for_tim = 0; 760 761 if (ignore_pending) 762 ignore_for_tim = BIT(IEEE80211_NUM_ACS) - 1; 763 764 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) { 765 unsigned long tids; 766 767 if (ignore_for_tim & ieee80211_ac_to_qos_mask[ac]) 768 continue; 769 770 indicate_tim |= !skb_queue_empty(&sta->tx_filtered[ac]) || 771 !skb_queue_empty(&sta->ps_tx_buf[ac]); 772 if (indicate_tim) 773 break; 774 775 tids = ieee80211_tids_for_ac(ac); 776 777 indicate_tim |= 778 sta->driver_buffered_tids & tids; 779 indicate_tim |= 780 sta->txq_buffered_tids & tids; 781 } 782 783 done: 784 spin_lock_bh(&local->tim_lock); 785 786 if (indicate_tim == __bss_tim_get(ps->tim, id)) 787 goto out_unlock; 788 789 if (indicate_tim) 790 __bss_tim_set(ps->tim, id); 791 else 792 __bss_tim_clear(ps->tim, id); 793 794 if (local->ops->set_tim && !WARN_ON(sta->dead)) { 795 local->tim_in_locked_section = true; 796 drv_set_tim(local, &sta->sta, indicate_tim); 797 local->tim_in_locked_section = false; 798 } 799 800 out_unlock: 801 spin_unlock_bh(&local->tim_lock); 802 } 803 804 void sta_info_recalc_tim(struct sta_info *sta) 805 { 806 __sta_info_recalc_tim(sta, false); 807 } 808 809 static bool sta_info_buffer_expired(struct sta_info *sta, struct sk_buff *skb) 810 { 811 struct ieee80211_tx_info *info; 812 int timeout; 813 814 if (!skb) 815 return false; 816 817 info = IEEE80211_SKB_CB(skb); 818 819 /* Timeout: (2 * listen_interval * beacon_int * 1024 / 1000000) sec */ 820 timeout = (sta->listen_interval * 821 sta->sdata->vif.bss_conf.beacon_int * 822 32 / 15625) * HZ; 823 if (timeout < STA_TX_BUFFER_EXPIRE) 824 timeout = STA_TX_BUFFER_EXPIRE; 825 return time_after(jiffies, info->control.jiffies + timeout); 826 } 827 828 829 static bool sta_info_cleanup_expire_buffered_ac(struct ieee80211_local *local, 830 struct sta_info *sta, int ac) 831 { 832 unsigned long flags; 833 struct sk_buff *skb; 834 835 /* 836 * First check for frames that should expire on the filtered 837 * queue. Frames here were rejected by the driver and are on 838 * a separate queue to avoid reordering with normal PS-buffered 839 * frames. They also aren't accounted for right now in the 840 * total_ps_buffered counter. 841 */ 842 for (;;) { 843 spin_lock_irqsave(&sta->tx_filtered[ac].lock, flags); 844 skb = skb_peek(&sta->tx_filtered[ac]); 845 if (sta_info_buffer_expired(sta, skb)) 846 skb = __skb_dequeue(&sta->tx_filtered[ac]); 847 else 848 skb = NULL; 849 spin_unlock_irqrestore(&sta->tx_filtered[ac].lock, flags); 850 851 /* 852 * Frames are queued in order, so if this one 853 * hasn't expired yet we can stop testing. If 854 * we actually reached the end of the queue we 855 * also need to stop, of course. 856 */ 857 if (!skb) 858 break; 859 ieee80211_free_txskb(&local->hw, skb); 860 } 861 862 /* 863 * Now also check the normal PS-buffered queue, this will 864 * only find something if the filtered queue was emptied 865 * since the filtered frames are all before the normal PS 866 * buffered frames. 867 */ 868 for (;;) { 869 spin_lock_irqsave(&sta->ps_tx_buf[ac].lock, flags); 870 skb = skb_peek(&sta->ps_tx_buf[ac]); 871 if (sta_info_buffer_expired(sta, skb)) 872 skb = __skb_dequeue(&sta->ps_tx_buf[ac]); 873 else 874 skb = NULL; 875 spin_unlock_irqrestore(&sta->ps_tx_buf[ac].lock, flags); 876 877 /* 878 * frames are queued in order, so if this one 879 * hasn't expired yet (or we reached the end of 880 * the queue) we can stop testing 881 */ 882 if (!skb) 883 break; 884 885 local->total_ps_buffered--; 886 ps_dbg(sta->sdata, "Buffered frame expired (STA %pM)\n", 887 sta->sta.addr); 888 ieee80211_free_txskb(&local->hw, skb); 889 } 890 891 /* 892 * Finally, recalculate the TIM bit for this station -- it might 893 * now be clear because the station was too slow to retrieve its 894 * frames. 895 */ 896 sta_info_recalc_tim(sta); 897 898 /* 899 * Return whether there are any frames still buffered, this is 900 * used to check whether the cleanup timer still needs to run, 901 * if there are no frames we don't need to rearm the timer. 902 */ 903 return !(skb_queue_empty(&sta->ps_tx_buf[ac]) && 904 skb_queue_empty(&sta->tx_filtered[ac])); 905 } 906 907 static bool sta_info_cleanup_expire_buffered(struct ieee80211_local *local, 908 struct sta_info *sta) 909 { 910 bool have_buffered = false; 911 int ac; 912 913 /* This is only necessary for stations on BSS/MBSS interfaces */ 914 if (!sta->sdata->bss && 915 !ieee80211_vif_is_mesh(&sta->sdata->vif)) 916 return false; 917 918 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) 919 have_buffered |= 920 sta_info_cleanup_expire_buffered_ac(local, sta, ac); 921 922 return have_buffered; 923 } 924 925 static int __must_check __sta_info_destroy_part1(struct sta_info *sta) 926 { 927 struct ieee80211_local *local; 928 struct ieee80211_sub_if_data *sdata; 929 int ret; 930 931 might_sleep(); 932 933 if (!sta) 934 return -ENOENT; 935 936 local = sta->local; 937 sdata = sta->sdata; 938 939 lockdep_assert_held(&local->sta_mtx); 940 941 /* 942 * Before removing the station from the driver and 943 * rate control, it might still start new aggregation 944 * sessions -- block that to make sure the tear-down 945 * will be sufficient. 946 */ 947 set_sta_flag(sta, WLAN_STA_BLOCK_BA); 948 ieee80211_sta_tear_down_BA_sessions(sta, AGG_STOP_DESTROY_STA); 949 950 /* 951 * Before removing the station from the driver there might be pending 952 * rx frames on RSS queues sent prior to the disassociation - wait for 953 * all such frames to be processed. 954 */ 955 drv_sync_rx_queues(local, sta); 956 957 ret = sta_info_hash_del(local, sta); 958 if (WARN_ON(ret)) 959 return ret; 960 961 /* 962 * for TDLS peers, make sure to return to the base channel before 963 * removal. 964 */ 965 if (test_sta_flag(sta, WLAN_STA_TDLS_OFF_CHANNEL)) { 966 drv_tdls_cancel_channel_switch(local, sdata, &sta->sta); 967 clear_sta_flag(sta, WLAN_STA_TDLS_OFF_CHANNEL); 968 } 969 970 list_del_rcu(&sta->list); 971 sta->removed = true; 972 973 drv_sta_pre_rcu_remove(local, sta->sdata, sta); 974 975 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN && 976 rcu_access_pointer(sdata->u.vlan.sta) == sta) 977 RCU_INIT_POINTER(sdata->u.vlan.sta, NULL); 978 979 return 0; 980 } 981 982 static void __sta_info_destroy_part2(struct sta_info *sta) 983 { 984 struct ieee80211_local *local = sta->local; 985 struct ieee80211_sub_if_data *sdata = sta->sdata; 986 struct station_info *sinfo; 987 int ret; 988 989 /* 990 * NOTE: This assumes at least synchronize_net() was done 991 * after _part1 and before _part2! 992 */ 993 994 might_sleep(); 995 lockdep_assert_held(&local->sta_mtx); 996 997 /* now keys can no longer be reached */ 998 ieee80211_free_sta_keys(local, sta); 999 1000 /* disable TIM bit - last chance to tell driver */ 1001 __sta_info_recalc_tim(sta, true); 1002 1003 sta->dead = true; 1004 1005 local->num_sta--; 1006 local->sta_generation++; 1007 1008 while (sta->sta_state > IEEE80211_STA_NONE) { 1009 ret = sta_info_move_state(sta, sta->sta_state - 1); 1010 if (ret) { 1011 WARN_ON_ONCE(1); 1012 break; 1013 } 1014 } 1015 1016 if (sta->uploaded) { 1017 ret = drv_sta_state(local, sdata, sta, IEEE80211_STA_NONE, 1018 IEEE80211_STA_NOTEXIST); 1019 WARN_ON_ONCE(ret != 0); 1020 } 1021 1022 sta_dbg(sdata, "Removed STA %pM\n", sta->sta.addr); 1023 1024 sinfo = kzalloc(sizeof(*sinfo), GFP_KERNEL); 1025 if (sinfo) 1026 sta_set_sinfo(sta, sinfo, true); 1027 cfg80211_del_sta_sinfo(sdata->dev, sta->sta.addr, sinfo, GFP_KERNEL); 1028 kfree(sinfo); 1029 1030 rate_control_remove_sta_debugfs(sta); 1031 ieee80211_sta_debugfs_remove(sta); 1032 1033 cleanup_single_sta(sta); 1034 } 1035 1036 int __must_check __sta_info_destroy(struct sta_info *sta) 1037 { 1038 int err = __sta_info_destroy_part1(sta); 1039 1040 if (err) 1041 return err; 1042 1043 synchronize_net(); 1044 1045 __sta_info_destroy_part2(sta); 1046 1047 return 0; 1048 } 1049 1050 int sta_info_destroy_addr(struct ieee80211_sub_if_data *sdata, const u8 *addr) 1051 { 1052 struct sta_info *sta; 1053 int ret; 1054 1055 mutex_lock(&sdata->local->sta_mtx); 1056 sta = sta_info_get(sdata, addr); 1057 ret = __sta_info_destroy(sta); 1058 mutex_unlock(&sdata->local->sta_mtx); 1059 1060 return ret; 1061 } 1062 1063 int sta_info_destroy_addr_bss(struct ieee80211_sub_if_data *sdata, 1064 const u8 *addr) 1065 { 1066 struct sta_info *sta; 1067 int ret; 1068 1069 mutex_lock(&sdata->local->sta_mtx); 1070 sta = sta_info_get_bss(sdata, addr); 1071 ret = __sta_info_destroy(sta); 1072 mutex_unlock(&sdata->local->sta_mtx); 1073 1074 return ret; 1075 } 1076 1077 static void sta_info_cleanup(struct timer_list *t) 1078 { 1079 struct ieee80211_local *local = from_timer(local, t, sta_cleanup); 1080 struct sta_info *sta; 1081 bool timer_needed = false; 1082 1083 rcu_read_lock(); 1084 list_for_each_entry_rcu(sta, &local->sta_list, list) 1085 if (sta_info_cleanup_expire_buffered(local, sta)) 1086 timer_needed = true; 1087 rcu_read_unlock(); 1088 1089 if (local->quiescing) 1090 return; 1091 1092 if (!timer_needed) 1093 return; 1094 1095 mod_timer(&local->sta_cleanup, 1096 round_jiffies(jiffies + STA_INFO_CLEANUP_INTERVAL)); 1097 } 1098 1099 int sta_info_init(struct ieee80211_local *local) 1100 { 1101 int err; 1102 1103 err = rhltable_init(&local->sta_hash, &sta_rht_params); 1104 if (err) 1105 return err; 1106 1107 spin_lock_init(&local->tim_lock); 1108 mutex_init(&local->sta_mtx); 1109 INIT_LIST_HEAD(&local->sta_list); 1110 1111 timer_setup(&local->sta_cleanup, sta_info_cleanup, 0); 1112 return 0; 1113 } 1114 1115 void sta_info_stop(struct ieee80211_local *local) 1116 { 1117 del_timer_sync(&local->sta_cleanup); 1118 rhltable_destroy(&local->sta_hash); 1119 } 1120 1121 1122 int __sta_info_flush(struct ieee80211_sub_if_data *sdata, bool vlans) 1123 { 1124 struct ieee80211_local *local = sdata->local; 1125 struct sta_info *sta, *tmp; 1126 LIST_HEAD(free_list); 1127 int ret = 0; 1128 1129 might_sleep(); 1130 1131 WARN_ON(vlans && sdata->vif.type != NL80211_IFTYPE_AP); 1132 WARN_ON(vlans && !sdata->bss); 1133 1134 mutex_lock(&local->sta_mtx); 1135 list_for_each_entry_safe(sta, tmp, &local->sta_list, list) { 1136 if (sdata == sta->sdata || 1137 (vlans && sdata->bss == sta->sdata->bss)) { 1138 if (!WARN_ON(__sta_info_destroy_part1(sta))) 1139 list_add(&sta->free_list, &free_list); 1140 ret++; 1141 } 1142 } 1143 1144 if (!list_empty(&free_list)) { 1145 synchronize_net(); 1146 list_for_each_entry_safe(sta, tmp, &free_list, free_list) 1147 __sta_info_destroy_part2(sta); 1148 } 1149 mutex_unlock(&local->sta_mtx); 1150 1151 return ret; 1152 } 1153 1154 void ieee80211_sta_expire(struct ieee80211_sub_if_data *sdata, 1155 unsigned long exp_time) 1156 { 1157 struct ieee80211_local *local = sdata->local; 1158 struct sta_info *sta, *tmp; 1159 1160 mutex_lock(&local->sta_mtx); 1161 1162 list_for_each_entry_safe(sta, tmp, &local->sta_list, list) { 1163 unsigned long last_active = ieee80211_sta_last_active(sta); 1164 1165 if (sdata != sta->sdata) 1166 continue; 1167 1168 if (time_is_before_jiffies(last_active + exp_time)) { 1169 sta_dbg(sta->sdata, "expiring inactive STA %pM\n", 1170 sta->sta.addr); 1171 1172 if (ieee80211_vif_is_mesh(&sdata->vif) && 1173 test_sta_flag(sta, WLAN_STA_PS_STA)) 1174 atomic_dec(&sdata->u.mesh.ps.num_sta_ps); 1175 1176 WARN_ON(__sta_info_destroy(sta)); 1177 } 1178 } 1179 1180 mutex_unlock(&local->sta_mtx); 1181 } 1182 1183 struct ieee80211_sta *ieee80211_find_sta_by_ifaddr(struct ieee80211_hw *hw, 1184 const u8 *addr, 1185 const u8 *localaddr) 1186 { 1187 struct ieee80211_local *local = hw_to_local(hw); 1188 struct rhlist_head *tmp; 1189 struct sta_info *sta; 1190 1191 /* 1192 * Just return a random station if localaddr is NULL 1193 * ... first in list. 1194 */ 1195 for_each_sta_info(local, addr, sta, tmp) { 1196 if (localaddr && 1197 !ether_addr_equal(sta->sdata->vif.addr, localaddr)) 1198 continue; 1199 if (!sta->uploaded) 1200 return NULL; 1201 return &sta->sta; 1202 } 1203 1204 return NULL; 1205 } 1206 EXPORT_SYMBOL_GPL(ieee80211_find_sta_by_ifaddr); 1207 1208 struct ieee80211_sta *ieee80211_find_sta(struct ieee80211_vif *vif, 1209 const u8 *addr) 1210 { 1211 struct sta_info *sta; 1212 1213 if (!vif) 1214 return NULL; 1215 1216 sta = sta_info_get_bss(vif_to_sdata(vif), addr); 1217 if (!sta) 1218 return NULL; 1219 1220 if (!sta->uploaded) 1221 return NULL; 1222 1223 return &sta->sta; 1224 } 1225 EXPORT_SYMBOL(ieee80211_find_sta); 1226 1227 /* powersave support code */ 1228 void ieee80211_sta_ps_deliver_wakeup(struct sta_info *sta) 1229 { 1230 struct ieee80211_sub_if_data *sdata = sta->sdata; 1231 struct ieee80211_local *local = sdata->local; 1232 struct sk_buff_head pending; 1233 int filtered = 0, buffered = 0, ac, i; 1234 unsigned long flags; 1235 struct ps_data *ps; 1236 1237 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) 1238 sdata = container_of(sdata->bss, struct ieee80211_sub_if_data, 1239 u.ap); 1240 1241 if (sdata->vif.type == NL80211_IFTYPE_AP) 1242 ps = &sdata->bss->ps; 1243 else if (ieee80211_vif_is_mesh(&sdata->vif)) 1244 ps = &sdata->u.mesh.ps; 1245 else 1246 return; 1247 1248 clear_sta_flag(sta, WLAN_STA_SP); 1249 1250 BUILD_BUG_ON(BITS_TO_LONGS(IEEE80211_NUM_TIDS) > 1); 1251 sta->driver_buffered_tids = 0; 1252 sta->txq_buffered_tids = 0; 1253 1254 if (!ieee80211_hw_check(&local->hw, AP_LINK_PS)) 1255 drv_sta_notify(local, sdata, STA_NOTIFY_AWAKE, &sta->sta); 1256 1257 for (i = 0; i < ARRAY_SIZE(sta->sta.txq); i++) { 1258 if (!sta->sta.txq[i] || !txq_has_queue(sta->sta.txq[i])) 1259 continue; 1260 1261 schedule_and_wake_txq(local, to_txq_info(sta->sta.txq[i])); 1262 } 1263 1264 skb_queue_head_init(&pending); 1265 1266 /* sync with ieee80211_tx_h_unicast_ps_buf */ 1267 spin_lock(&sta->ps_lock); 1268 /* Send all buffered frames to the station */ 1269 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) { 1270 int count = skb_queue_len(&pending), tmp; 1271 1272 spin_lock_irqsave(&sta->tx_filtered[ac].lock, flags); 1273 skb_queue_splice_tail_init(&sta->tx_filtered[ac], &pending); 1274 spin_unlock_irqrestore(&sta->tx_filtered[ac].lock, flags); 1275 tmp = skb_queue_len(&pending); 1276 filtered += tmp - count; 1277 count = tmp; 1278 1279 spin_lock_irqsave(&sta->ps_tx_buf[ac].lock, flags); 1280 skb_queue_splice_tail_init(&sta->ps_tx_buf[ac], &pending); 1281 spin_unlock_irqrestore(&sta->ps_tx_buf[ac].lock, flags); 1282 tmp = skb_queue_len(&pending); 1283 buffered += tmp - count; 1284 } 1285 1286 ieee80211_add_pending_skbs(local, &pending); 1287 1288 /* now we're no longer in the deliver code */ 1289 clear_sta_flag(sta, WLAN_STA_PS_DELIVER); 1290 1291 /* The station might have polled and then woken up before we responded, 1292 * so clear these flags now to avoid them sticking around. 1293 */ 1294 clear_sta_flag(sta, WLAN_STA_PSPOLL); 1295 clear_sta_flag(sta, WLAN_STA_UAPSD); 1296 spin_unlock(&sta->ps_lock); 1297 1298 atomic_dec(&ps->num_sta_ps); 1299 1300 /* This station just woke up and isn't aware of our SMPS state */ 1301 if (!ieee80211_vif_is_mesh(&sdata->vif) && 1302 !ieee80211_smps_is_restrictive(sta->known_smps_mode, 1303 sdata->smps_mode) && 1304 sta->known_smps_mode != sdata->bss->req_smps && 1305 sta_info_tx_streams(sta) != 1) { 1306 ht_dbg(sdata, 1307 "%pM just woke up and MIMO capable - update SMPS\n", 1308 sta->sta.addr); 1309 ieee80211_send_smps_action(sdata, sdata->bss->req_smps, 1310 sta->sta.addr, 1311 sdata->vif.bss_conf.bssid); 1312 } 1313 1314 local->total_ps_buffered -= buffered; 1315 1316 sta_info_recalc_tim(sta); 1317 1318 ps_dbg(sdata, 1319 "STA %pM aid %d sending %d filtered/%d PS frames since STA woke up\n", 1320 sta->sta.addr, sta->sta.aid, filtered, buffered); 1321 1322 ieee80211_check_fast_xmit(sta); 1323 } 1324 1325 static void ieee80211_send_null_response(struct sta_info *sta, int tid, 1326 enum ieee80211_frame_release_type reason, 1327 bool call_driver, bool more_data) 1328 { 1329 struct ieee80211_sub_if_data *sdata = sta->sdata; 1330 struct ieee80211_local *local = sdata->local; 1331 struct ieee80211_qos_hdr *nullfunc; 1332 struct sk_buff *skb; 1333 int size = sizeof(*nullfunc); 1334 __le16 fc; 1335 bool qos = sta->sta.wme; 1336 struct ieee80211_tx_info *info; 1337 struct ieee80211_chanctx_conf *chanctx_conf; 1338 1339 /* Don't send NDPs when STA is connected HE */ 1340 if (sdata->vif.type == NL80211_IFTYPE_STATION && 1341 !(sdata->u.mgd.flags & IEEE80211_STA_DISABLE_HE)) 1342 return; 1343 1344 if (qos) { 1345 fc = cpu_to_le16(IEEE80211_FTYPE_DATA | 1346 IEEE80211_STYPE_QOS_NULLFUNC | 1347 IEEE80211_FCTL_FROMDS); 1348 } else { 1349 size -= 2; 1350 fc = cpu_to_le16(IEEE80211_FTYPE_DATA | 1351 IEEE80211_STYPE_NULLFUNC | 1352 IEEE80211_FCTL_FROMDS); 1353 } 1354 1355 skb = dev_alloc_skb(local->hw.extra_tx_headroom + size); 1356 if (!skb) 1357 return; 1358 1359 skb_reserve(skb, local->hw.extra_tx_headroom); 1360 1361 nullfunc = skb_put(skb, size); 1362 nullfunc->frame_control = fc; 1363 nullfunc->duration_id = 0; 1364 memcpy(nullfunc->addr1, sta->sta.addr, ETH_ALEN); 1365 memcpy(nullfunc->addr2, sdata->vif.addr, ETH_ALEN); 1366 memcpy(nullfunc->addr3, sdata->vif.addr, ETH_ALEN); 1367 nullfunc->seq_ctrl = 0; 1368 1369 skb->priority = tid; 1370 skb_set_queue_mapping(skb, ieee802_1d_to_ac[tid]); 1371 if (qos) { 1372 nullfunc->qos_ctrl = cpu_to_le16(tid); 1373 1374 if (reason == IEEE80211_FRAME_RELEASE_UAPSD) { 1375 nullfunc->qos_ctrl |= 1376 cpu_to_le16(IEEE80211_QOS_CTL_EOSP); 1377 if (more_data) 1378 nullfunc->frame_control |= 1379 cpu_to_le16(IEEE80211_FCTL_MOREDATA); 1380 } 1381 } 1382 1383 info = IEEE80211_SKB_CB(skb); 1384 1385 /* 1386 * Tell TX path to send this frame even though the 1387 * STA may still remain is PS mode after this frame 1388 * exchange. Also set EOSP to indicate this packet 1389 * ends the poll/service period. 1390 */ 1391 info->flags |= IEEE80211_TX_CTL_NO_PS_BUFFER | 1392 IEEE80211_TX_STATUS_EOSP | 1393 IEEE80211_TX_CTL_REQ_TX_STATUS; 1394 1395 info->control.flags |= IEEE80211_TX_CTRL_PS_RESPONSE; 1396 1397 if (call_driver) 1398 drv_allow_buffered_frames(local, sta, BIT(tid), 1, 1399 reason, false); 1400 1401 skb->dev = sdata->dev; 1402 1403 rcu_read_lock(); 1404 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf); 1405 if (WARN_ON(!chanctx_conf)) { 1406 rcu_read_unlock(); 1407 kfree_skb(skb); 1408 return; 1409 } 1410 1411 info->band = chanctx_conf->def.chan->band; 1412 ieee80211_xmit(sdata, sta, skb, 0); 1413 rcu_read_unlock(); 1414 } 1415 1416 static int find_highest_prio_tid(unsigned long tids) 1417 { 1418 /* lower 3 TIDs aren't ordered perfectly */ 1419 if (tids & 0xF8) 1420 return fls(tids) - 1; 1421 /* TID 0 is BE just like TID 3 */ 1422 if (tids & BIT(0)) 1423 return 0; 1424 return fls(tids) - 1; 1425 } 1426 1427 /* Indicates if the MORE_DATA bit should be set in the last 1428 * frame obtained by ieee80211_sta_ps_get_frames. 1429 * Note that driver_release_tids is relevant only if 1430 * reason = IEEE80211_FRAME_RELEASE_PSPOLL 1431 */ 1432 static bool 1433 ieee80211_sta_ps_more_data(struct sta_info *sta, u8 ignored_acs, 1434 enum ieee80211_frame_release_type reason, 1435 unsigned long driver_release_tids) 1436 { 1437 int ac; 1438 1439 /* If the driver has data on more than one TID then 1440 * certainly there's more data if we release just a 1441 * single frame now (from a single TID). This will 1442 * only happen for PS-Poll. 1443 */ 1444 if (reason == IEEE80211_FRAME_RELEASE_PSPOLL && 1445 hweight16(driver_release_tids) > 1) 1446 return true; 1447 1448 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) { 1449 if (ignored_acs & ieee80211_ac_to_qos_mask[ac]) 1450 continue; 1451 1452 if (!skb_queue_empty(&sta->tx_filtered[ac]) || 1453 !skb_queue_empty(&sta->ps_tx_buf[ac])) 1454 return true; 1455 } 1456 1457 return false; 1458 } 1459 1460 static void 1461 ieee80211_sta_ps_get_frames(struct sta_info *sta, int n_frames, u8 ignored_acs, 1462 enum ieee80211_frame_release_type reason, 1463 struct sk_buff_head *frames, 1464 unsigned long *driver_release_tids) 1465 { 1466 struct ieee80211_sub_if_data *sdata = sta->sdata; 1467 struct ieee80211_local *local = sdata->local; 1468 int ac; 1469 1470 /* Get response frame(s) and more data bit for the last one. */ 1471 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) { 1472 unsigned long tids; 1473 1474 if (ignored_acs & ieee80211_ac_to_qos_mask[ac]) 1475 continue; 1476 1477 tids = ieee80211_tids_for_ac(ac); 1478 1479 /* if we already have frames from software, then we can't also 1480 * release from hardware queues 1481 */ 1482 if (skb_queue_empty(frames)) { 1483 *driver_release_tids |= 1484 sta->driver_buffered_tids & tids; 1485 *driver_release_tids |= sta->txq_buffered_tids & tids; 1486 } 1487 1488 if (!*driver_release_tids) { 1489 struct sk_buff *skb; 1490 1491 while (n_frames > 0) { 1492 skb = skb_dequeue(&sta->tx_filtered[ac]); 1493 if (!skb) { 1494 skb = skb_dequeue( 1495 &sta->ps_tx_buf[ac]); 1496 if (skb) 1497 local->total_ps_buffered--; 1498 } 1499 if (!skb) 1500 break; 1501 n_frames--; 1502 __skb_queue_tail(frames, skb); 1503 } 1504 } 1505 1506 /* If we have more frames buffered on this AC, then abort the 1507 * loop since we can't send more data from other ACs before 1508 * the buffered frames from this. 1509 */ 1510 if (!skb_queue_empty(&sta->tx_filtered[ac]) || 1511 !skb_queue_empty(&sta->ps_tx_buf[ac])) 1512 break; 1513 } 1514 } 1515 1516 static void 1517 ieee80211_sta_ps_deliver_response(struct sta_info *sta, 1518 int n_frames, u8 ignored_acs, 1519 enum ieee80211_frame_release_type reason) 1520 { 1521 struct ieee80211_sub_if_data *sdata = sta->sdata; 1522 struct ieee80211_local *local = sdata->local; 1523 unsigned long driver_release_tids = 0; 1524 struct sk_buff_head frames; 1525 bool more_data; 1526 1527 /* Service or PS-Poll period starts */ 1528 set_sta_flag(sta, WLAN_STA_SP); 1529 1530 __skb_queue_head_init(&frames); 1531 1532 ieee80211_sta_ps_get_frames(sta, n_frames, ignored_acs, reason, 1533 &frames, &driver_release_tids); 1534 1535 more_data = ieee80211_sta_ps_more_data(sta, ignored_acs, reason, driver_release_tids); 1536 1537 if (driver_release_tids && reason == IEEE80211_FRAME_RELEASE_PSPOLL) 1538 driver_release_tids = 1539 BIT(find_highest_prio_tid(driver_release_tids)); 1540 1541 if (skb_queue_empty(&frames) && !driver_release_tids) { 1542 int tid, ac; 1543 1544 /* 1545 * For PS-Poll, this can only happen due to a race condition 1546 * when we set the TIM bit and the station notices it, but 1547 * before it can poll for the frame we expire it. 1548 * 1549 * For uAPSD, this is said in the standard (11.2.1.5 h): 1550 * At each unscheduled SP for a non-AP STA, the AP shall 1551 * attempt to transmit at least one MSDU or MMPDU, but no 1552 * more than the value specified in the Max SP Length field 1553 * in the QoS Capability element from delivery-enabled ACs, 1554 * that are destined for the non-AP STA. 1555 * 1556 * Since we have no other MSDU/MMPDU, transmit a QoS null frame. 1557 */ 1558 1559 /* This will evaluate to 1, 3, 5 or 7. */ 1560 for (ac = IEEE80211_AC_VO; ac < IEEE80211_NUM_ACS; ac++) 1561 if (!(ignored_acs & ieee80211_ac_to_qos_mask[ac])) 1562 break; 1563 tid = 7 - 2 * ac; 1564 1565 ieee80211_send_null_response(sta, tid, reason, true, false); 1566 } else if (!driver_release_tids) { 1567 struct sk_buff_head pending; 1568 struct sk_buff *skb; 1569 int num = 0; 1570 u16 tids = 0; 1571 bool need_null = false; 1572 1573 skb_queue_head_init(&pending); 1574 1575 while ((skb = __skb_dequeue(&frames))) { 1576 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); 1577 struct ieee80211_hdr *hdr = (void *) skb->data; 1578 u8 *qoshdr = NULL; 1579 1580 num++; 1581 1582 /* 1583 * Tell TX path to send this frame even though the 1584 * STA may still remain is PS mode after this frame 1585 * exchange. 1586 */ 1587 info->flags |= IEEE80211_TX_CTL_NO_PS_BUFFER; 1588 info->control.flags |= IEEE80211_TX_CTRL_PS_RESPONSE; 1589 1590 /* 1591 * Use MoreData flag to indicate whether there are 1592 * more buffered frames for this STA 1593 */ 1594 if (more_data || !skb_queue_empty(&frames)) 1595 hdr->frame_control |= 1596 cpu_to_le16(IEEE80211_FCTL_MOREDATA); 1597 else 1598 hdr->frame_control &= 1599 cpu_to_le16(~IEEE80211_FCTL_MOREDATA); 1600 1601 if (ieee80211_is_data_qos(hdr->frame_control) || 1602 ieee80211_is_qos_nullfunc(hdr->frame_control)) 1603 qoshdr = ieee80211_get_qos_ctl(hdr); 1604 1605 tids |= BIT(skb->priority); 1606 1607 __skb_queue_tail(&pending, skb); 1608 1609 /* end service period after last frame or add one */ 1610 if (!skb_queue_empty(&frames)) 1611 continue; 1612 1613 if (reason != IEEE80211_FRAME_RELEASE_UAPSD) { 1614 /* for PS-Poll, there's only one frame */ 1615 info->flags |= IEEE80211_TX_STATUS_EOSP | 1616 IEEE80211_TX_CTL_REQ_TX_STATUS; 1617 break; 1618 } 1619 1620 /* For uAPSD, things are a bit more complicated. If the 1621 * last frame has a QoS header (i.e. is a QoS-data or 1622 * QoS-nulldata frame) then just set the EOSP bit there 1623 * and be done. 1624 * If the frame doesn't have a QoS header (which means 1625 * it should be a bufferable MMPDU) then we can't set 1626 * the EOSP bit in the QoS header; add a QoS-nulldata 1627 * frame to the list to send it after the MMPDU. 1628 * 1629 * Note that this code is only in the mac80211-release 1630 * code path, we assume that the driver will not buffer 1631 * anything but QoS-data frames, or if it does, will 1632 * create the QoS-nulldata frame by itself if needed. 1633 * 1634 * Cf. 802.11-2012 10.2.1.10 (c). 1635 */ 1636 if (qoshdr) { 1637 *qoshdr |= IEEE80211_QOS_CTL_EOSP; 1638 1639 info->flags |= IEEE80211_TX_STATUS_EOSP | 1640 IEEE80211_TX_CTL_REQ_TX_STATUS; 1641 } else { 1642 /* The standard isn't completely clear on this 1643 * as it says the more-data bit should be set 1644 * if there are more BUs. The QoS-Null frame 1645 * we're about to send isn't buffered yet, we 1646 * only create it below, but let's pretend it 1647 * was buffered just in case some clients only 1648 * expect more-data=0 when eosp=1. 1649 */ 1650 hdr->frame_control |= 1651 cpu_to_le16(IEEE80211_FCTL_MOREDATA); 1652 need_null = true; 1653 num++; 1654 } 1655 break; 1656 } 1657 1658 drv_allow_buffered_frames(local, sta, tids, num, 1659 reason, more_data); 1660 1661 ieee80211_add_pending_skbs(local, &pending); 1662 1663 if (need_null) 1664 ieee80211_send_null_response( 1665 sta, find_highest_prio_tid(tids), 1666 reason, false, false); 1667 1668 sta_info_recalc_tim(sta); 1669 } else { 1670 int tid; 1671 1672 /* 1673 * We need to release a frame that is buffered somewhere in the 1674 * driver ... it'll have to handle that. 1675 * Note that the driver also has to check the number of frames 1676 * on the TIDs we're releasing from - if there are more than 1677 * n_frames it has to set the more-data bit (if we didn't ask 1678 * it to set it anyway due to other buffered frames); if there 1679 * are fewer than n_frames it has to make sure to adjust that 1680 * to allow the service period to end properly. 1681 */ 1682 drv_release_buffered_frames(local, sta, driver_release_tids, 1683 n_frames, reason, more_data); 1684 1685 /* 1686 * Note that we don't recalculate the TIM bit here as it would 1687 * most likely have no effect at all unless the driver told us 1688 * that the TID(s) became empty before returning here from the 1689 * release function. 1690 * Either way, however, when the driver tells us that the TID(s) 1691 * became empty or we find that a txq became empty, we'll do the 1692 * TIM recalculation. 1693 */ 1694 1695 if (!sta->sta.txq[0]) 1696 return; 1697 1698 for (tid = 0; tid < ARRAY_SIZE(sta->sta.txq); tid++) { 1699 if (!sta->sta.txq[tid] || 1700 !(driver_release_tids & BIT(tid)) || 1701 txq_has_queue(sta->sta.txq[tid])) 1702 continue; 1703 1704 sta_info_recalc_tim(sta); 1705 break; 1706 } 1707 } 1708 } 1709 1710 void ieee80211_sta_ps_deliver_poll_response(struct sta_info *sta) 1711 { 1712 u8 ignore_for_response = sta->sta.uapsd_queues; 1713 1714 /* 1715 * If all ACs are delivery-enabled then we should reply 1716 * from any of them, if only some are enabled we reply 1717 * only from the non-enabled ones. 1718 */ 1719 if (ignore_for_response == BIT(IEEE80211_NUM_ACS) - 1) 1720 ignore_for_response = 0; 1721 1722 ieee80211_sta_ps_deliver_response(sta, 1, ignore_for_response, 1723 IEEE80211_FRAME_RELEASE_PSPOLL); 1724 } 1725 1726 void ieee80211_sta_ps_deliver_uapsd(struct sta_info *sta) 1727 { 1728 int n_frames = sta->sta.max_sp; 1729 u8 delivery_enabled = sta->sta.uapsd_queues; 1730 1731 /* 1732 * If we ever grow support for TSPEC this might happen if 1733 * the TSPEC update from hostapd comes in between a trigger 1734 * frame setting WLAN_STA_UAPSD in the RX path and this 1735 * actually getting called. 1736 */ 1737 if (!delivery_enabled) 1738 return; 1739 1740 switch (sta->sta.max_sp) { 1741 case 1: 1742 n_frames = 2; 1743 break; 1744 case 2: 1745 n_frames = 4; 1746 break; 1747 case 3: 1748 n_frames = 6; 1749 break; 1750 case 0: 1751 /* XXX: what is a good value? */ 1752 n_frames = 128; 1753 break; 1754 } 1755 1756 ieee80211_sta_ps_deliver_response(sta, n_frames, ~delivery_enabled, 1757 IEEE80211_FRAME_RELEASE_UAPSD); 1758 } 1759 1760 void ieee80211_sta_block_awake(struct ieee80211_hw *hw, 1761 struct ieee80211_sta *pubsta, bool block) 1762 { 1763 struct sta_info *sta = container_of(pubsta, struct sta_info, sta); 1764 1765 trace_api_sta_block_awake(sta->local, pubsta, block); 1766 1767 if (block) { 1768 set_sta_flag(sta, WLAN_STA_PS_DRIVER); 1769 ieee80211_clear_fast_xmit(sta); 1770 return; 1771 } 1772 1773 if (!test_sta_flag(sta, WLAN_STA_PS_DRIVER)) 1774 return; 1775 1776 if (!test_sta_flag(sta, WLAN_STA_PS_STA)) { 1777 set_sta_flag(sta, WLAN_STA_PS_DELIVER); 1778 clear_sta_flag(sta, WLAN_STA_PS_DRIVER); 1779 ieee80211_queue_work(hw, &sta->drv_deliver_wk); 1780 } else if (test_sta_flag(sta, WLAN_STA_PSPOLL) || 1781 test_sta_flag(sta, WLAN_STA_UAPSD)) { 1782 /* must be asleep in this case */ 1783 clear_sta_flag(sta, WLAN_STA_PS_DRIVER); 1784 ieee80211_queue_work(hw, &sta->drv_deliver_wk); 1785 } else { 1786 clear_sta_flag(sta, WLAN_STA_PS_DRIVER); 1787 ieee80211_check_fast_xmit(sta); 1788 } 1789 } 1790 EXPORT_SYMBOL(ieee80211_sta_block_awake); 1791 1792 void ieee80211_sta_eosp(struct ieee80211_sta *pubsta) 1793 { 1794 struct sta_info *sta = container_of(pubsta, struct sta_info, sta); 1795 struct ieee80211_local *local = sta->local; 1796 1797 trace_api_eosp(local, pubsta); 1798 1799 clear_sta_flag(sta, WLAN_STA_SP); 1800 } 1801 EXPORT_SYMBOL(ieee80211_sta_eosp); 1802 1803 void ieee80211_send_eosp_nullfunc(struct ieee80211_sta *pubsta, int tid) 1804 { 1805 struct sta_info *sta = container_of(pubsta, struct sta_info, sta); 1806 enum ieee80211_frame_release_type reason; 1807 bool more_data; 1808 1809 trace_api_send_eosp_nullfunc(sta->local, pubsta, tid); 1810 1811 reason = IEEE80211_FRAME_RELEASE_UAPSD; 1812 more_data = ieee80211_sta_ps_more_data(sta, ~sta->sta.uapsd_queues, 1813 reason, 0); 1814 1815 ieee80211_send_null_response(sta, tid, reason, false, more_data); 1816 } 1817 EXPORT_SYMBOL(ieee80211_send_eosp_nullfunc); 1818 1819 void ieee80211_sta_set_buffered(struct ieee80211_sta *pubsta, 1820 u8 tid, bool buffered) 1821 { 1822 struct sta_info *sta = container_of(pubsta, struct sta_info, sta); 1823 1824 if (WARN_ON(tid >= IEEE80211_NUM_TIDS)) 1825 return; 1826 1827 trace_api_sta_set_buffered(sta->local, pubsta, tid, buffered); 1828 1829 if (buffered) 1830 set_bit(tid, &sta->driver_buffered_tids); 1831 else 1832 clear_bit(tid, &sta->driver_buffered_tids); 1833 1834 sta_info_recalc_tim(sta); 1835 } 1836 EXPORT_SYMBOL(ieee80211_sta_set_buffered); 1837 1838 void ieee80211_sta_register_airtime(struct ieee80211_sta *pubsta, u8 tid, 1839 u32 tx_airtime, u32 rx_airtime) 1840 { 1841 struct sta_info *sta = container_of(pubsta, struct sta_info, sta); 1842 struct ieee80211_local *local = sta->sdata->local; 1843 u8 ac = ieee80211_ac_from_tid(tid); 1844 u32 airtime = 0; 1845 1846 if (sta->local->airtime_flags & AIRTIME_USE_TX) 1847 airtime += tx_airtime; 1848 if (sta->local->airtime_flags & AIRTIME_USE_RX) 1849 airtime += rx_airtime; 1850 1851 spin_lock_bh(&local->active_txq_lock[ac]); 1852 sta->airtime[ac].tx_airtime += tx_airtime; 1853 sta->airtime[ac].rx_airtime += rx_airtime; 1854 sta->airtime[ac].deficit -= airtime; 1855 spin_unlock_bh(&local->active_txq_lock[ac]); 1856 } 1857 EXPORT_SYMBOL(ieee80211_sta_register_airtime); 1858 1859 int sta_info_move_state(struct sta_info *sta, 1860 enum ieee80211_sta_state new_state) 1861 { 1862 might_sleep(); 1863 1864 if (sta->sta_state == new_state) 1865 return 0; 1866 1867 /* check allowed transitions first */ 1868 1869 switch (new_state) { 1870 case IEEE80211_STA_NONE: 1871 if (sta->sta_state != IEEE80211_STA_AUTH) 1872 return -EINVAL; 1873 break; 1874 case IEEE80211_STA_AUTH: 1875 if (sta->sta_state != IEEE80211_STA_NONE && 1876 sta->sta_state != IEEE80211_STA_ASSOC) 1877 return -EINVAL; 1878 break; 1879 case IEEE80211_STA_ASSOC: 1880 if (sta->sta_state != IEEE80211_STA_AUTH && 1881 sta->sta_state != IEEE80211_STA_AUTHORIZED) 1882 return -EINVAL; 1883 break; 1884 case IEEE80211_STA_AUTHORIZED: 1885 if (sta->sta_state != IEEE80211_STA_ASSOC) 1886 return -EINVAL; 1887 break; 1888 default: 1889 WARN(1, "invalid state %d", new_state); 1890 return -EINVAL; 1891 } 1892 1893 sta_dbg(sta->sdata, "moving STA %pM to state %d\n", 1894 sta->sta.addr, new_state); 1895 1896 /* 1897 * notify the driver before the actual changes so it can 1898 * fail the transition 1899 */ 1900 if (test_sta_flag(sta, WLAN_STA_INSERTED)) { 1901 int err = drv_sta_state(sta->local, sta->sdata, sta, 1902 sta->sta_state, new_state); 1903 if (err) 1904 return err; 1905 } 1906 1907 /* reflect the change in all state variables */ 1908 1909 switch (new_state) { 1910 case IEEE80211_STA_NONE: 1911 if (sta->sta_state == IEEE80211_STA_AUTH) 1912 clear_bit(WLAN_STA_AUTH, &sta->_flags); 1913 break; 1914 case IEEE80211_STA_AUTH: 1915 if (sta->sta_state == IEEE80211_STA_NONE) { 1916 set_bit(WLAN_STA_AUTH, &sta->_flags); 1917 } else if (sta->sta_state == IEEE80211_STA_ASSOC) { 1918 clear_bit(WLAN_STA_ASSOC, &sta->_flags); 1919 ieee80211_recalc_min_chandef(sta->sdata); 1920 if (!sta->sta.support_p2p_ps) 1921 ieee80211_recalc_p2p_go_ps_allowed(sta->sdata); 1922 } 1923 break; 1924 case IEEE80211_STA_ASSOC: 1925 if (sta->sta_state == IEEE80211_STA_AUTH) { 1926 set_bit(WLAN_STA_ASSOC, &sta->_flags); 1927 ieee80211_recalc_min_chandef(sta->sdata); 1928 if (!sta->sta.support_p2p_ps) 1929 ieee80211_recalc_p2p_go_ps_allowed(sta->sdata); 1930 } else if (sta->sta_state == IEEE80211_STA_AUTHORIZED) { 1931 ieee80211_vif_dec_num_mcast(sta->sdata); 1932 clear_bit(WLAN_STA_AUTHORIZED, &sta->_flags); 1933 ieee80211_clear_fast_xmit(sta); 1934 ieee80211_clear_fast_rx(sta); 1935 } 1936 break; 1937 case IEEE80211_STA_AUTHORIZED: 1938 if (sta->sta_state == IEEE80211_STA_ASSOC) { 1939 ieee80211_vif_inc_num_mcast(sta->sdata); 1940 set_bit(WLAN_STA_AUTHORIZED, &sta->_flags); 1941 ieee80211_check_fast_xmit(sta); 1942 ieee80211_check_fast_rx(sta); 1943 } 1944 break; 1945 default: 1946 break; 1947 } 1948 1949 sta->sta_state = new_state; 1950 1951 return 0; 1952 } 1953 1954 u8 sta_info_tx_streams(struct sta_info *sta) 1955 { 1956 struct ieee80211_sta_ht_cap *ht_cap = &sta->sta.ht_cap; 1957 u8 rx_streams; 1958 1959 if (!sta->sta.ht_cap.ht_supported) 1960 return 1; 1961 1962 if (sta->sta.vht_cap.vht_supported) { 1963 int i; 1964 u16 tx_mcs_map = 1965 le16_to_cpu(sta->sta.vht_cap.vht_mcs.tx_mcs_map); 1966 1967 for (i = 7; i >= 0; i--) 1968 if ((tx_mcs_map & (0x3 << (i * 2))) != 1969 IEEE80211_VHT_MCS_NOT_SUPPORTED) 1970 return i + 1; 1971 } 1972 1973 if (ht_cap->mcs.rx_mask[3]) 1974 rx_streams = 4; 1975 else if (ht_cap->mcs.rx_mask[2]) 1976 rx_streams = 3; 1977 else if (ht_cap->mcs.rx_mask[1]) 1978 rx_streams = 2; 1979 else 1980 rx_streams = 1; 1981 1982 if (!(ht_cap->mcs.tx_params & IEEE80211_HT_MCS_TX_RX_DIFF)) 1983 return rx_streams; 1984 1985 return ((ht_cap->mcs.tx_params & IEEE80211_HT_MCS_TX_MAX_STREAMS_MASK) 1986 >> IEEE80211_HT_MCS_TX_MAX_STREAMS_SHIFT) + 1; 1987 } 1988 1989 static struct ieee80211_sta_rx_stats * 1990 sta_get_last_rx_stats(struct sta_info *sta) 1991 { 1992 struct ieee80211_sta_rx_stats *stats = &sta->rx_stats; 1993 struct ieee80211_local *local = sta->local; 1994 int cpu; 1995 1996 if (!ieee80211_hw_check(&local->hw, USES_RSS)) 1997 return stats; 1998 1999 for_each_possible_cpu(cpu) { 2000 struct ieee80211_sta_rx_stats *cpustats; 2001 2002 cpustats = per_cpu_ptr(sta->pcpu_rx_stats, cpu); 2003 2004 if (time_after(cpustats->last_rx, stats->last_rx)) 2005 stats = cpustats; 2006 } 2007 2008 return stats; 2009 } 2010 2011 static void sta_stats_decode_rate(struct ieee80211_local *local, u32 rate, 2012 struct rate_info *rinfo) 2013 { 2014 rinfo->bw = STA_STATS_GET(BW, rate); 2015 2016 switch (STA_STATS_GET(TYPE, rate)) { 2017 case STA_STATS_RATE_TYPE_VHT: 2018 rinfo->flags = RATE_INFO_FLAGS_VHT_MCS; 2019 rinfo->mcs = STA_STATS_GET(VHT_MCS, rate); 2020 rinfo->nss = STA_STATS_GET(VHT_NSS, rate); 2021 if (STA_STATS_GET(SGI, rate)) 2022 rinfo->flags |= RATE_INFO_FLAGS_SHORT_GI; 2023 break; 2024 case STA_STATS_RATE_TYPE_HT: 2025 rinfo->flags = RATE_INFO_FLAGS_MCS; 2026 rinfo->mcs = STA_STATS_GET(HT_MCS, rate); 2027 if (STA_STATS_GET(SGI, rate)) 2028 rinfo->flags |= RATE_INFO_FLAGS_SHORT_GI; 2029 break; 2030 case STA_STATS_RATE_TYPE_LEGACY: { 2031 struct ieee80211_supported_band *sband; 2032 u16 brate; 2033 unsigned int shift; 2034 int band = STA_STATS_GET(LEGACY_BAND, rate); 2035 int rate_idx = STA_STATS_GET(LEGACY_IDX, rate); 2036 2037 sband = local->hw.wiphy->bands[band]; 2038 brate = sband->bitrates[rate_idx].bitrate; 2039 if (rinfo->bw == RATE_INFO_BW_5) 2040 shift = 2; 2041 else if (rinfo->bw == RATE_INFO_BW_10) 2042 shift = 1; 2043 else 2044 shift = 0; 2045 rinfo->legacy = DIV_ROUND_UP(brate, 1 << shift); 2046 break; 2047 } 2048 case STA_STATS_RATE_TYPE_HE: 2049 rinfo->flags = RATE_INFO_FLAGS_HE_MCS; 2050 rinfo->mcs = STA_STATS_GET(HE_MCS, rate); 2051 rinfo->nss = STA_STATS_GET(HE_NSS, rate); 2052 rinfo->he_gi = STA_STATS_GET(HE_GI, rate); 2053 rinfo->he_ru_alloc = STA_STATS_GET(HE_RU, rate); 2054 rinfo->he_dcm = STA_STATS_GET(HE_DCM, rate); 2055 break; 2056 } 2057 } 2058 2059 static int sta_set_rate_info_rx(struct sta_info *sta, struct rate_info *rinfo) 2060 { 2061 u16 rate = READ_ONCE(sta_get_last_rx_stats(sta)->last_rate); 2062 2063 if (rate == STA_STATS_RATE_INVALID) 2064 return -EINVAL; 2065 2066 sta_stats_decode_rate(sta->local, rate, rinfo); 2067 return 0; 2068 } 2069 2070 static void sta_set_tidstats(struct sta_info *sta, 2071 struct cfg80211_tid_stats *tidstats, 2072 int tid) 2073 { 2074 struct ieee80211_local *local = sta->local; 2075 2076 if (!(tidstats->filled & BIT(NL80211_TID_STATS_RX_MSDU))) { 2077 unsigned int start; 2078 2079 do { 2080 start = u64_stats_fetch_begin(&sta->rx_stats.syncp); 2081 tidstats->rx_msdu = sta->rx_stats.msdu[tid]; 2082 } while (u64_stats_fetch_retry(&sta->rx_stats.syncp, start)); 2083 2084 tidstats->filled |= BIT(NL80211_TID_STATS_RX_MSDU); 2085 } 2086 2087 if (!(tidstats->filled & BIT(NL80211_TID_STATS_TX_MSDU))) { 2088 tidstats->filled |= BIT(NL80211_TID_STATS_TX_MSDU); 2089 tidstats->tx_msdu = sta->tx_stats.msdu[tid]; 2090 } 2091 2092 if (!(tidstats->filled & BIT(NL80211_TID_STATS_TX_MSDU_RETRIES)) && 2093 ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) { 2094 tidstats->filled |= BIT(NL80211_TID_STATS_TX_MSDU_RETRIES); 2095 tidstats->tx_msdu_retries = sta->status_stats.msdu_retries[tid]; 2096 } 2097 2098 if (!(tidstats->filled & BIT(NL80211_TID_STATS_TX_MSDU_FAILED)) && 2099 ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) { 2100 tidstats->filled |= BIT(NL80211_TID_STATS_TX_MSDU_FAILED); 2101 tidstats->tx_msdu_failed = sta->status_stats.msdu_failed[tid]; 2102 } 2103 2104 if (local->ops->wake_tx_queue && tid < IEEE80211_NUM_TIDS) { 2105 spin_lock_bh(&local->fq.lock); 2106 rcu_read_lock(); 2107 2108 tidstats->filled |= BIT(NL80211_TID_STATS_TXQ_STATS); 2109 ieee80211_fill_txq_stats(&tidstats->txq_stats, 2110 to_txq_info(sta->sta.txq[tid])); 2111 2112 rcu_read_unlock(); 2113 spin_unlock_bh(&local->fq.lock); 2114 } 2115 } 2116 2117 static inline u64 sta_get_stats_bytes(struct ieee80211_sta_rx_stats *rxstats) 2118 { 2119 unsigned int start; 2120 u64 value; 2121 2122 do { 2123 start = u64_stats_fetch_begin(&rxstats->syncp); 2124 value = rxstats->bytes; 2125 } while (u64_stats_fetch_retry(&rxstats->syncp, start)); 2126 2127 return value; 2128 } 2129 2130 void sta_set_sinfo(struct sta_info *sta, struct station_info *sinfo, 2131 bool tidstats) 2132 { 2133 struct ieee80211_sub_if_data *sdata = sta->sdata; 2134 struct ieee80211_local *local = sdata->local; 2135 u32 thr = 0; 2136 int i, ac, cpu; 2137 struct ieee80211_sta_rx_stats *last_rxstats; 2138 2139 last_rxstats = sta_get_last_rx_stats(sta); 2140 2141 sinfo->generation = sdata->local->sta_generation; 2142 2143 /* do before driver, so beacon filtering drivers have a 2144 * chance to e.g. just add the number of filtered beacons 2145 * (or just modify the value entirely, of course) 2146 */ 2147 if (sdata->vif.type == NL80211_IFTYPE_STATION) 2148 sinfo->rx_beacon = sdata->u.mgd.count_beacon_signal; 2149 2150 drv_sta_statistics(local, sdata, &sta->sta, sinfo); 2151 2152 sinfo->filled |= BIT_ULL(NL80211_STA_INFO_INACTIVE_TIME) | 2153 BIT_ULL(NL80211_STA_INFO_STA_FLAGS) | 2154 BIT_ULL(NL80211_STA_INFO_BSS_PARAM) | 2155 BIT_ULL(NL80211_STA_INFO_CONNECTED_TIME) | 2156 BIT_ULL(NL80211_STA_INFO_RX_DROP_MISC); 2157 2158 if (sdata->vif.type == NL80211_IFTYPE_STATION) { 2159 sinfo->beacon_loss_count = sdata->u.mgd.beacon_loss_count; 2160 sinfo->filled |= BIT_ULL(NL80211_STA_INFO_BEACON_LOSS); 2161 } 2162 2163 sinfo->connected_time = ktime_get_seconds() - sta->last_connected; 2164 sinfo->inactive_time = 2165 jiffies_to_msecs(jiffies - ieee80211_sta_last_active(sta)); 2166 2167 if (!(sinfo->filled & (BIT_ULL(NL80211_STA_INFO_TX_BYTES64) | 2168 BIT_ULL(NL80211_STA_INFO_TX_BYTES)))) { 2169 sinfo->tx_bytes = 0; 2170 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) 2171 sinfo->tx_bytes += sta->tx_stats.bytes[ac]; 2172 sinfo->filled |= BIT_ULL(NL80211_STA_INFO_TX_BYTES64); 2173 } 2174 2175 if (!(sinfo->filled & BIT_ULL(NL80211_STA_INFO_TX_PACKETS))) { 2176 sinfo->tx_packets = 0; 2177 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) 2178 sinfo->tx_packets += sta->tx_stats.packets[ac]; 2179 sinfo->filled |= BIT_ULL(NL80211_STA_INFO_TX_PACKETS); 2180 } 2181 2182 if (!(sinfo->filled & (BIT_ULL(NL80211_STA_INFO_RX_BYTES64) | 2183 BIT_ULL(NL80211_STA_INFO_RX_BYTES)))) { 2184 sinfo->rx_bytes += sta_get_stats_bytes(&sta->rx_stats); 2185 2186 if (sta->pcpu_rx_stats) { 2187 for_each_possible_cpu(cpu) { 2188 struct ieee80211_sta_rx_stats *cpurxs; 2189 2190 cpurxs = per_cpu_ptr(sta->pcpu_rx_stats, cpu); 2191 sinfo->rx_bytes += sta_get_stats_bytes(cpurxs); 2192 } 2193 } 2194 2195 sinfo->filled |= BIT_ULL(NL80211_STA_INFO_RX_BYTES64); 2196 } 2197 2198 if (!(sinfo->filled & BIT_ULL(NL80211_STA_INFO_RX_PACKETS))) { 2199 sinfo->rx_packets = sta->rx_stats.packets; 2200 if (sta->pcpu_rx_stats) { 2201 for_each_possible_cpu(cpu) { 2202 struct ieee80211_sta_rx_stats *cpurxs; 2203 2204 cpurxs = per_cpu_ptr(sta->pcpu_rx_stats, cpu); 2205 sinfo->rx_packets += cpurxs->packets; 2206 } 2207 } 2208 sinfo->filled |= BIT_ULL(NL80211_STA_INFO_RX_PACKETS); 2209 } 2210 2211 if (!(sinfo->filled & BIT_ULL(NL80211_STA_INFO_TX_RETRIES))) { 2212 sinfo->tx_retries = sta->status_stats.retry_count; 2213 sinfo->filled |= BIT_ULL(NL80211_STA_INFO_TX_RETRIES); 2214 } 2215 2216 if (!(sinfo->filled & BIT_ULL(NL80211_STA_INFO_TX_FAILED))) { 2217 sinfo->tx_failed = sta->status_stats.retry_failed; 2218 sinfo->filled |= BIT_ULL(NL80211_STA_INFO_TX_FAILED); 2219 } 2220 2221 if (!(sinfo->filled & BIT_ULL(NL80211_STA_INFO_RX_DURATION))) { 2222 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) 2223 sinfo->rx_duration += sta->airtime[ac].rx_airtime; 2224 sinfo->filled |= BIT_ULL(NL80211_STA_INFO_RX_DURATION); 2225 } 2226 2227 if (!(sinfo->filled & BIT_ULL(NL80211_STA_INFO_TX_DURATION))) { 2228 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) 2229 sinfo->tx_duration += sta->airtime[ac].tx_airtime; 2230 sinfo->filled |= BIT_ULL(NL80211_STA_INFO_TX_DURATION); 2231 } 2232 2233 if (!(sinfo->filled & BIT_ULL(NL80211_STA_INFO_AIRTIME_WEIGHT))) { 2234 sinfo->airtime_weight = sta->airtime_weight; 2235 sinfo->filled |= BIT_ULL(NL80211_STA_INFO_AIRTIME_WEIGHT); 2236 } 2237 2238 sinfo->rx_dropped_misc = sta->rx_stats.dropped; 2239 if (sta->pcpu_rx_stats) { 2240 for_each_possible_cpu(cpu) { 2241 struct ieee80211_sta_rx_stats *cpurxs; 2242 2243 cpurxs = per_cpu_ptr(sta->pcpu_rx_stats, cpu); 2244 sinfo->rx_dropped_misc += cpurxs->dropped; 2245 } 2246 } 2247 2248 if (sdata->vif.type == NL80211_IFTYPE_STATION && 2249 !(sdata->vif.driver_flags & IEEE80211_VIF_BEACON_FILTER)) { 2250 sinfo->filled |= BIT_ULL(NL80211_STA_INFO_BEACON_RX) | 2251 BIT_ULL(NL80211_STA_INFO_BEACON_SIGNAL_AVG); 2252 sinfo->rx_beacon_signal_avg = ieee80211_ave_rssi(&sdata->vif); 2253 } 2254 2255 if (ieee80211_hw_check(&sta->local->hw, SIGNAL_DBM) || 2256 ieee80211_hw_check(&sta->local->hw, SIGNAL_UNSPEC)) { 2257 if (!(sinfo->filled & BIT_ULL(NL80211_STA_INFO_SIGNAL))) { 2258 sinfo->signal = (s8)last_rxstats->last_signal; 2259 sinfo->filled |= BIT_ULL(NL80211_STA_INFO_SIGNAL); 2260 } 2261 2262 if (!sta->pcpu_rx_stats && 2263 !(sinfo->filled & BIT_ULL(NL80211_STA_INFO_SIGNAL_AVG))) { 2264 sinfo->signal_avg = 2265 -ewma_signal_read(&sta->rx_stats_avg.signal); 2266 sinfo->filled |= BIT_ULL(NL80211_STA_INFO_SIGNAL_AVG); 2267 } 2268 } 2269 2270 /* for the average - if pcpu_rx_stats isn't set - rxstats must point to 2271 * the sta->rx_stats struct, so the check here is fine with and without 2272 * pcpu statistics 2273 */ 2274 if (last_rxstats->chains && 2275 !(sinfo->filled & (BIT_ULL(NL80211_STA_INFO_CHAIN_SIGNAL) | 2276 BIT_ULL(NL80211_STA_INFO_CHAIN_SIGNAL_AVG)))) { 2277 sinfo->filled |= BIT_ULL(NL80211_STA_INFO_CHAIN_SIGNAL); 2278 if (!sta->pcpu_rx_stats) 2279 sinfo->filled |= BIT_ULL(NL80211_STA_INFO_CHAIN_SIGNAL_AVG); 2280 2281 sinfo->chains = last_rxstats->chains; 2282 2283 for (i = 0; i < ARRAY_SIZE(sinfo->chain_signal); i++) { 2284 sinfo->chain_signal[i] = 2285 last_rxstats->chain_signal_last[i]; 2286 sinfo->chain_signal_avg[i] = 2287 -ewma_signal_read(&sta->rx_stats_avg.chain_signal[i]); 2288 } 2289 } 2290 2291 if (!(sinfo->filled & BIT_ULL(NL80211_STA_INFO_TX_BITRATE))) { 2292 sta_set_rate_info_tx(sta, &sta->tx_stats.last_rate, 2293 &sinfo->txrate); 2294 sinfo->filled |= BIT_ULL(NL80211_STA_INFO_TX_BITRATE); 2295 } 2296 2297 if (!(sinfo->filled & BIT_ULL(NL80211_STA_INFO_RX_BITRATE))) { 2298 if (sta_set_rate_info_rx(sta, &sinfo->rxrate) == 0) 2299 sinfo->filled |= BIT_ULL(NL80211_STA_INFO_RX_BITRATE); 2300 } 2301 2302 if (tidstats && !cfg80211_sinfo_alloc_tid_stats(sinfo, GFP_KERNEL)) { 2303 for (i = 0; i < IEEE80211_NUM_TIDS + 1; i++) 2304 sta_set_tidstats(sta, &sinfo->pertid[i], i); 2305 } 2306 2307 if (ieee80211_vif_is_mesh(&sdata->vif)) { 2308 #ifdef CONFIG_MAC80211_MESH 2309 sinfo->filled |= BIT_ULL(NL80211_STA_INFO_LLID) | 2310 BIT_ULL(NL80211_STA_INFO_PLID) | 2311 BIT_ULL(NL80211_STA_INFO_PLINK_STATE) | 2312 BIT_ULL(NL80211_STA_INFO_LOCAL_PM) | 2313 BIT_ULL(NL80211_STA_INFO_PEER_PM) | 2314 BIT_ULL(NL80211_STA_INFO_NONPEER_PM) | 2315 BIT_ULL(NL80211_STA_INFO_CONNECTED_TO_GATE); 2316 2317 sinfo->llid = sta->mesh->llid; 2318 sinfo->plid = sta->mesh->plid; 2319 sinfo->plink_state = sta->mesh->plink_state; 2320 if (test_sta_flag(sta, WLAN_STA_TOFFSET_KNOWN)) { 2321 sinfo->filled |= BIT_ULL(NL80211_STA_INFO_T_OFFSET); 2322 sinfo->t_offset = sta->mesh->t_offset; 2323 } 2324 sinfo->local_pm = sta->mesh->local_pm; 2325 sinfo->peer_pm = sta->mesh->peer_pm; 2326 sinfo->nonpeer_pm = sta->mesh->nonpeer_pm; 2327 sinfo->connected_to_gate = sta->mesh->connected_to_gate; 2328 #endif 2329 } 2330 2331 sinfo->bss_param.flags = 0; 2332 if (sdata->vif.bss_conf.use_cts_prot) 2333 sinfo->bss_param.flags |= BSS_PARAM_FLAGS_CTS_PROT; 2334 if (sdata->vif.bss_conf.use_short_preamble) 2335 sinfo->bss_param.flags |= BSS_PARAM_FLAGS_SHORT_PREAMBLE; 2336 if (sdata->vif.bss_conf.use_short_slot) 2337 sinfo->bss_param.flags |= BSS_PARAM_FLAGS_SHORT_SLOT_TIME; 2338 sinfo->bss_param.dtim_period = sdata->vif.bss_conf.dtim_period; 2339 sinfo->bss_param.beacon_interval = sdata->vif.bss_conf.beacon_int; 2340 2341 sinfo->sta_flags.set = 0; 2342 sinfo->sta_flags.mask = BIT(NL80211_STA_FLAG_AUTHORIZED) | 2343 BIT(NL80211_STA_FLAG_SHORT_PREAMBLE) | 2344 BIT(NL80211_STA_FLAG_WME) | 2345 BIT(NL80211_STA_FLAG_MFP) | 2346 BIT(NL80211_STA_FLAG_AUTHENTICATED) | 2347 BIT(NL80211_STA_FLAG_ASSOCIATED) | 2348 BIT(NL80211_STA_FLAG_TDLS_PEER); 2349 if (test_sta_flag(sta, WLAN_STA_AUTHORIZED)) 2350 sinfo->sta_flags.set |= BIT(NL80211_STA_FLAG_AUTHORIZED); 2351 if (test_sta_flag(sta, WLAN_STA_SHORT_PREAMBLE)) 2352 sinfo->sta_flags.set |= BIT(NL80211_STA_FLAG_SHORT_PREAMBLE); 2353 if (sta->sta.wme) 2354 sinfo->sta_flags.set |= BIT(NL80211_STA_FLAG_WME); 2355 if (test_sta_flag(sta, WLAN_STA_MFP)) 2356 sinfo->sta_flags.set |= BIT(NL80211_STA_FLAG_MFP); 2357 if (test_sta_flag(sta, WLAN_STA_AUTH)) 2358 sinfo->sta_flags.set |= BIT(NL80211_STA_FLAG_AUTHENTICATED); 2359 if (test_sta_flag(sta, WLAN_STA_ASSOC)) 2360 sinfo->sta_flags.set |= BIT(NL80211_STA_FLAG_ASSOCIATED); 2361 if (test_sta_flag(sta, WLAN_STA_TDLS_PEER)) 2362 sinfo->sta_flags.set |= BIT(NL80211_STA_FLAG_TDLS_PEER); 2363 2364 thr = sta_get_expected_throughput(sta); 2365 2366 if (thr != 0) { 2367 sinfo->filled |= BIT_ULL(NL80211_STA_INFO_EXPECTED_THROUGHPUT); 2368 sinfo->expected_throughput = thr; 2369 } 2370 2371 if (!(sinfo->filled & BIT_ULL(NL80211_STA_INFO_ACK_SIGNAL)) && 2372 sta->status_stats.ack_signal_filled) { 2373 sinfo->ack_signal = sta->status_stats.last_ack_signal; 2374 sinfo->filled |= BIT_ULL(NL80211_STA_INFO_ACK_SIGNAL); 2375 } 2376 2377 if (!(sinfo->filled & BIT_ULL(NL80211_STA_INFO_ACK_SIGNAL_AVG)) && 2378 sta->status_stats.ack_signal_filled) { 2379 sinfo->avg_ack_signal = 2380 -(s8)ewma_avg_signal_read( 2381 &sta->status_stats.avg_ack_signal); 2382 sinfo->filled |= 2383 BIT_ULL(NL80211_STA_INFO_ACK_SIGNAL_AVG); 2384 } 2385 2386 if (ieee80211_vif_is_mesh(&sdata->vif)) { 2387 sinfo->filled |= BIT_ULL(NL80211_STA_INFO_AIRTIME_LINK_METRIC); 2388 sinfo->airtime_link_metric = 2389 airtime_link_metric_get(local, sta); 2390 } 2391 } 2392 2393 u32 sta_get_expected_throughput(struct sta_info *sta) 2394 { 2395 struct ieee80211_sub_if_data *sdata = sta->sdata; 2396 struct ieee80211_local *local = sdata->local; 2397 struct rate_control_ref *ref = NULL; 2398 u32 thr = 0; 2399 2400 if (test_sta_flag(sta, WLAN_STA_RATE_CONTROL)) 2401 ref = local->rate_ctrl; 2402 2403 /* check if the driver has a SW RC implementation */ 2404 if (ref && ref->ops->get_expected_throughput) 2405 thr = ref->ops->get_expected_throughput(sta->rate_ctrl_priv); 2406 else 2407 thr = drv_get_expected_throughput(local, sta); 2408 2409 return thr; 2410 } 2411 2412 unsigned long ieee80211_sta_last_active(struct sta_info *sta) 2413 { 2414 struct ieee80211_sta_rx_stats *stats = sta_get_last_rx_stats(sta); 2415 2416 if (time_after(stats->last_rx, sta->status_stats.last_ack)) 2417 return stats->last_rx; 2418 return sta->status_stats.last_ack; 2419 } 2420 2421 static void sta_update_codel_params(struct sta_info *sta, u32 thr) 2422 { 2423 if (!sta->sdata->local->ops->wake_tx_queue) 2424 return; 2425 2426 if (thr && thr < STA_SLOW_THRESHOLD * sta->local->num_sta) { 2427 sta->cparams.target = MS2TIME(50); 2428 sta->cparams.interval = MS2TIME(300); 2429 sta->cparams.ecn = false; 2430 } else { 2431 sta->cparams.target = MS2TIME(20); 2432 sta->cparams.interval = MS2TIME(100); 2433 sta->cparams.ecn = true; 2434 } 2435 } 2436 2437 void ieee80211_sta_set_expected_throughput(struct ieee80211_sta *pubsta, 2438 u32 thr) 2439 { 2440 struct sta_info *sta = container_of(pubsta, struct sta_info, sta); 2441 2442 sta_update_codel_params(sta, thr); 2443 } 2444