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 * 6 * This program is free software; you can redistribute it and/or modify 7 * it under the terms of the GNU General Public License version 2 as 8 * published by the Free Software Foundation. 9 */ 10 11 #include <linux/module.h> 12 #include <linux/init.h> 13 #include <linux/etherdevice.h> 14 #include <linux/netdevice.h> 15 #include <linux/types.h> 16 #include <linux/slab.h> 17 #include <linux/skbuff.h> 18 #include <linux/if_arp.h> 19 #include <linux/timer.h> 20 #include <linux/rtnetlink.h> 21 22 #include <net/mac80211.h> 23 #include "ieee80211_i.h" 24 #include "driver-ops.h" 25 #include "rate.h" 26 #include "sta_info.h" 27 #include "debugfs_sta.h" 28 #include "mesh.h" 29 #include "wme.h" 30 31 /** 32 * DOC: STA information lifetime rules 33 * 34 * STA info structures (&struct sta_info) are managed in a hash table 35 * for faster lookup and a list for iteration. They are managed using 36 * RCU, i.e. access to the list and hash table is protected by RCU. 37 * 38 * Upon allocating a STA info structure with sta_info_alloc(), the caller 39 * owns that structure. It must then insert it into the hash table using 40 * either sta_info_insert() or sta_info_insert_rcu(); only in the latter 41 * case (which acquires an rcu read section but must not be called from 42 * within one) will the pointer still be valid after the call. Note that 43 * the caller may not do much with the STA info before inserting it, in 44 * particular, it may not start any mesh peer link management or add 45 * encryption keys. 46 * 47 * When the insertion fails (sta_info_insert()) returns non-zero), the 48 * structure will have been freed by sta_info_insert()! 49 * 50 * Station entries are added by mac80211 when you establish a link with a 51 * peer. This means different things for the different type of interfaces 52 * we support. For a regular station this mean we add the AP sta when we 53 * receive an association response from the AP. For IBSS this occurs when 54 * get to know about a peer on the same IBSS. For WDS we add the sta for 55 * the peer immediately upon device open. When using AP mode we add stations 56 * for each respective station upon request from userspace through nl80211. 57 * 58 * In order to remove a STA info structure, various sta_info_destroy_*() 59 * calls are available. 60 * 61 * There is no concept of ownership on a STA entry, each structure is 62 * owned by the global hash table/list until it is removed. All users of 63 * the structure need to be RCU protected so that the structure won't be 64 * freed before they are done using it. 65 */ 66 67 /* Caller must hold local->sta_mtx */ 68 static int sta_info_hash_del(struct ieee80211_local *local, 69 struct sta_info *sta) 70 { 71 struct sta_info *s; 72 73 s = rcu_dereference_protected(local->sta_hash[STA_HASH(sta->sta.addr)], 74 lockdep_is_held(&local->sta_mtx)); 75 if (!s) 76 return -ENOENT; 77 if (s == sta) { 78 rcu_assign_pointer(local->sta_hash[STA_HASH(sta->sta.addr)], 79 s->hnext); 80 return 0; 81 } 82 83 while (rcu_access_pointer(s->hnext) && 84 rcu_access_pointer(s->hnext) != sta) 85 s = rcu_dereference_protected(s->hnext, 86 lockdep_is_held(&local->sta_mtx)); 87 if (rcu_access_pointer(s->hnext)) { 88 rcu_assign_pointer(s->hnext, sta->hnext); 89 return 0; 90 } 91 92 return -ENOENT; 93 } 94 95 static void __cleanup_single_sta(struct sta_info *sta) 96 { 97 int ac, i; 98 struct tid_ampdu_tx *tid_tx; 99 struct ieee80211_sub_if_data *sdata = sta->sdata; 100 struct ieee80211_local *local = sdata->local; 101 struct ps_data *ps; 102 103 if (test_sta_flag(sta, WLAN_STA_PS_STA) || 104 test_sta_flag(sta, WLAN_STA_PS_DRIVER) || 105 test_sta_flag(sta, WLAN_STA_PS_DELIVER)) { 106 if (sta->sdata->vif.type == NL80211_IFTYPE_AP || 107 sta->sdata->vif.type == NL80211_IFTYPE_AP_VLAN) 108 ps = &sdata->bss->ps; 109 else if (ieee80211_vif_is_mesh(&sdata->vif)) 110 ps = &sdata->u.mesh.ps; 111 else 112 return; 113 114 clear_sta_flag(sta, WLAN_STA_PS_STA); 115 clear_sta_flag(sta, WLAN_STA_PS_DRIVER); 116 clear_sta_flag(sta, WLAN_STA_PS_DELIVER); 117 118 atomic_dec(&ps->num_sta_ps); 119 } 120 121 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) { 122 local->total_ps_buffered -= skb_queue_len(&sta->ps_tx_buf[ac]); 123 ieee80211_purge_tx_queue(&local->hw, &sta->ps_tx_buf[ac]); 124 ieee80211_purge_tx_queue(&local->hw, &sta->tx_filtered[ac]); 125 } 126 127 if (ieee80211_vif_is_mesh(&sdata->vif)) 128 mesh_sta_cleanup(sta); 129 130 cancel_work_sync(&sta->drv_deliver_wk); 131 132 /* 133 * Destroy aggregation state here. It would be nice to wait for the 134 * driver to finish aggregation stop and then clean up, but for now 135 * drivers have to handle aggregation stop being requested, followed 136 * directly by station destruction. 137 */ 138 for (i = 0; i < IEEE80211_NUM_TIDS; i++) { 139 kfree(sta->ampdu_mlme.tid_start_tx[i]); 140 tid_tx = rcu_dereference_raw(sta->ampdu_mlme.tid_tx[i]); 141 if (!tid_tx) 142 continue; 143 ieee80211_purge_tx_queue(&local->hw, &tid_tx->pending); 144 kfree(tid_tx); 145 } 146 } 147 148 static void cleanup_single_sta(struct sta_info *sta) 149 { 150 struct ieee80211_sub_if_data *sdata = sta->sdata; 151 struct ieee80211_local *local = sdata->local; 152 153 __cleanup_single_sta(sta); 154 sta_info_free(local, sta); 155 } 156 157 /* protected by RCU */ 158 struct sta_info *sta_info_get(struct ieee80211_sub_if_data *sdata, 159 const u8 *addr) 160 { 161 struct ieee80211_local *local = sdata->local; 162 struct sta_info *sta; 163 164 sta = rcu_dereference_check(local->sta_hash[STA_HASH(addr)], 165 lockdep_is_held(&local->sta_mtx)); 166 while (sta) { 167 if (sta->sdata == sdata && 168 ether_addr_equal(sta->sta.addr, addr)) 169 break; 170 sta = rcu_dereference_check(sta->hnext, 171 lockdep_is_held(&local->sta_mtx)); 172 } 173 return sta; 174 } 175 176 /* 177 * Get sta info either from the specified interface 178 * or from one of its vlans 179 */ 180 struct sta_info *sta_info_get_bss(struct ieee80211_sub_if_data *sdata, 181 const u8 *addr) 182 { 183 struct ieee80211_local *local = sdata->local; 184 struct sta_info *sta; 185 186 sta = rcu_dereference_check(local->sta_hash[STA_HASH(addr)], 187 lockdep_is_held(&local->sta_mtx)); 188 while (sta) { 189 if ((sta->sdata == sdata || 190 (sta->sdata->bss && sta->sdata->bss == sdata->bss)) && 191 ether_addr_equal(sta->sta.addr, addr)) 192 break; 193 sta = rcu_dereference_check(sta->hnext, 194 lockdep_is_held(&local->sta_mtx)); 195 } 196 return sta; 197 } 198 199 struct sta_info *sta_info_get_by_idx(struct ieee80211_sub_if_data *sdata, 200 int idx) 201 { 202 struct ieee80211_local *local = sdata->local; 203 struct sta_info *sta; 204 int i = 0; 205 206 list_for_each_entry_rcu(sta, &local->sta_list, list) { 207 if (sdata != sta->sdata) 208 continue; 209 if (i < idx) { 210 ++i; 211 continue; 212 } 213 return sta; 214 } 215 216 return NULL; 217 } 218 219 /** 220 * sta_info_free - free STA 221 * 222 * @local: pointer to the global information 223 * @sta: STA info to free 224 * 225 * This function must undo everything done by sta_info_alloc() 226 * that may happen before sta_info_insert(). It may only be 227 * called when sta_info_insert() has not been attempted (and 228 * if that fails, the station is freed anyway.) 229 */ 230 void sta_info_free(struct ieee80211_local *local, struct sta_info *sta) 231 { 232 int i; 233 234 if (sta->rate_ctrl) 235 rate_control_free_sta(sta); 236 237 if (sta->tx_lat) { 238 for (i = 0; i < IEEE80211_NUM_TIDS; i++) 239 kfree(sta->tx_lat[i].bins); 240 kfree(sta->tx_lat); 241 } 242 243 sta_dbg(sta->sdata, "Destroyed STA %pM\n", sta->sta.addr); 244 245 kfree(rcu_dereference_raw(sta->sta.rates)); 246 kfree(sta); 247 } 248 249 /* Caller must hold local->sta_mtx */ 250 static void sta_info_hash_add(struct ieee80211_local *local, 251 struct sta_info *sta) 252 { 253 lockdep_assert_held(&local->sta_mtx); 254 sta->hnext = local->sta_hash[STA_HASH(sta->sta.addr)]; 255 rcu_assign_pointer(local->sta_hash[STA_HASH(sta->sta.addr)], sta); 256 } 257 258 static void sta_deliver_ps_frames(struct work_struct *wk) 259 { 260 struct sta_info *sta; 261 262 sta = container_of(wk, struct sta_info, drv_deliver_wk); 263 264 if (sta->dead) 265 return; 266 267 local_bh_disable(); 268 if (!test_sta_flag(sta, WLAN_STA_PS_STA)) 269 ieee80211_sta_ps_deliver_wakeup(sta); 270 else if (test_and_clear_sta_flag(sta, WLAN_STA_PSPOLL)) 271 ieee80211_sta_ps_deliver_poll_response(sta); 272 else if (test_and_clear_sta_flag(sta, WLAN_STA_UAPSD)) 273 ieee80211_sta_ps_deliver_uapsd(sta); 274 local_bh_enable(); 275 } 276 277 static int sta_prepare_rate_control(struct ieee80211_local *local, 278 struct sta_info *sta, gfp_t gfp) 279 { 280 if (local->hw.flags & IEEE80211_HW_HAS_RATE_CONTROL) 281 return 0; 282 283 sta->rate_ctrl = local->rate_ctrl; 284 sta->rate_ctrl_priv = rate_control_alloc_sta(sta->rate_ctrl, 285 &sta->sta, gfp); 286 if (!sta->rate_ctrl_priv) 287 return -ENOMEM; 288 289 return 0; 290 } 291 292 struct sta_info *sta_info_alloc(struct ieee80211_sub_if_data *sdata, 293 const u8 *addr, gfp_t gfp) 294 { 295 struct ieee80211_local *local = sdata->local; 296 struct sta_info *sta; 297 struct timespec uptime; 298 struct ieee80211_tx_latency_bin_ranges *tx_latency; 299 int i; 300 301 sta = kzalloc(sizeof(*sta) + local->hw.sta_data_size, gfp); 302 if (!sta) 303 return NULL; 304 305 rcu_read_lock(); 306 tx_latency = rcu_dereference(local->tx_latency); 307 /* init stations Tx latency statistics && TID bins */ 308 if (tx_latency) { 309 sta->tx_lat = kzalloc(IEEE80211_NUM_TIDS * 310 sizeof(struct ieee80211_tx_latency_stat), 311 GFP_ATOMIC); 312 if (!sta->tx_lat) { 313 rcu_read_unlock(); 314 goto free; 315 } 316 317 if (tx_latency->n_ranges) { 318 for (i = 0; i < IEEE80211_NUM_TIDS; i++) { 319 /* size of bins is size of the ranges +1 */ 320 sta->tx_lat[i].bin_count = 321 tx_latency->n_ranges + 1; 322 sta->tx_lat[i].bins = 323 kcalloc(sta->tx_lat[i].bin_count, 324 sizeof(u32), GFP_ATOMIC); 325 if (!sta->tx_lat[i].bins) { 326 rcu_read_unlock(); 327 goto free; 328 } 329 } 330 } 331 } 332 rcu_read_unlock(); 333 334 spin_lock_init(&sta->lock); 335 spin_lock_init(&sta->ps_lock); 336 INIT_WORK(&sta->drv_deliver_wk, sta_deliver_ps_frames); 337 INIT_WORK(&sta->ampdu_mlme.work, ieee80211_ba_session_work); 338 mutex_init(&sta->ampdu_mlme.mtx); 339 #ifdef CONFIG_MAC80211_MESH 340 if (ieee80211_vif_is_mesh(&sdata->vif) && 341 !sdata->u.mesh.user_mpm) 342 init_timer(&sta->plink_timer); 343 sta->nonpeer_pm = NL80211_MESH_POWER_ACTIVE; 344 #endif 345 346 memcpy(sta->sta.addr, addr, ETH_ALEN); 347 sta->local = local; 348 sta->sdata = sdata; 349 sta->last_rx = jiffies; 350 351 sta->sta_state = IEEE80211_STA_NONE; 352 353 /* Mark TID as unreserved */ 354 sta->reserved_tid = IEEE80211_TID_UNRESERVED; 355 356 ktime_get_ts(&uptime); 357 sta->last_connected = uptime.tv_sec; 358 ewma_init(&sta->avg_signal, 1024, 8); 359 for (i = 0; i < ARRAY_SIZE(sta->chain_signal_avg); i++) 360 ewma_init(&sta->chain_signal_avg[i], 1024, 8); 361 362 if (sta_prepare_rate_control(local, sta, gfp)) 363 goto free; 364 365 for (i = 0; i < IEEE80211_NUM_TIDS; i++) { 366 /* 367 * timer_to_tid must be initialized with identity mapping 368 * to enable session_timer's data differentiation. See 369 * sta_rx_agg_session_timer_expired for usage. 370 */ 371 sta->timer_to_tid[i] = i; 372 } 373 for (i = 0; i < IEEE80211_NUM_ACS; i++) { 374 skb_queue_head_init(&sta->ps_tx_buf[i]); 375 skb_queue_head_init(&sta->tx_filtered[i]); 376 } 377 378 for (i = 0; i < IEEE80211_NUM_TIDS; i++) 379 sta->last_seq_ctrl[i] = cpu_to_le16(USHRT_MAX); 380 381 sta->sta.smps_mode = IEEE80211_SMPS_OFF; 382 if (sdata->vif.type == NL80211_IFTYPE_AP || 383 sdata->vif.type == NL80211_IFTYPE_AP_VLAN) { 384 struct ieee80211_supported_band *sband = 385 local->hw.wiphy->bands[ieee80211_get_sdata_band(sdata)]; 386 u8 smps = (sband->ht_cap.cap & IEEE80211_HT_CAP_SM_PS) >> 387 IEEE80211_HT_CAP_SM_PS_SHIFT; 388 /* 389 * Assume that hostapd advertises our caps in the beacon and 390 * this is the known_smps_mode for a station that just assciated 391 */ 392 switch (smps) { 393 case WLAN_HT_SMPS_CONTROL_DISABLED: 394 sta->known_smps_mode = IEEE80211_SMPS_OFF; 395 break; 396 case WLAN_HT_SMPS_CONTROL_STATIC: 397 sta->known_smps_mode = IEEE80211_SMPS_STATIC; 398 break; 399 case WLAN_HT_SMPS_CONTROL_DYNAMIC: 400 sta->known_smps_mode = IEEE80211_SMPS_DYNAMIC; 401 break; 402 default: 403 WARN_ON(1); 404 } 405 } 406 407 sta_dbg(sdata, "Allocated STA %pM\n", sta->sta.addr); 408 return sta; 409 410 free: 411 if (sta->tx_lat) { 412 for (i = 0; i < IEEE80211_NUM_TIDS; i++) 413 kfree(sta->tx_lat[i].bins); 414 kfree(sta->tx_lat); 415 } 416 kfree(sta); 417 return NULL; 418 } 419 420 static int sta_info_insert_check(struct sta_info *sta) 421 { 422 struct ieee80211_sub_if_data *sdata = sta->sdata; 423 424 /* 425 * Can't be a WARN_ON because it can be triggered through a race: 426 * something inserts a STA (on one CPU) without holding the RTNL 427 * and another CPU turns off the net device. 428 */ 429 if (unlikely(!ieee80211_sdata_running(sdata))) 430 return -ENETDOWN; 431 432 if (WARN_ON(ether_addr_equal(sta->sta.addr, sdata->vif.addr) || 433 is_multicast_ether_addr(sta->sta.addr))) 434 return -EINVAL; 435 436 return 0; 437 } 438 439 static int sta_info_insert_drv_state(struct ieee80211_local *local, 440 struct ieee80211_sub_if_data *sdata, 441 struct sta_info *sta) 442 { 443 enum ieee80211_sta_state state; 444 int err = 0; 445 446 for (state = IEEE80211_STA_NOTEXIST; state < sta->sta_state; state++) { 447 err = drv_sta_state(local, sdata, sta, state, state + 1); 448 if (err) 449 break; 450 } 451 452 if (!err) { 453 /* 454 * Drivers using legacy sta_add/sta_remove callbacks only 455 * get uploaded set to true after sta_add is called. 456 */ 457 if (!local->ops->sta_add) 458 sta->uploaded = true; 459 return 0; 460 } 461 462 if (sdata->vif.type == NL80211_IFTYPE_ADHOC) { 463 sdata_info(sdata, 464 "failed to move IBSS STA %pM to state %d (%d) - keeping it anyway\n", 465 sta->sta.addr, state + 1, err); 466 err = 0; 467 } 468 469 /* unwind on error */ 470 for (; state > IEEE80211_STA_NOTEXIST; state--) 471 WARN_ON(drv_sta_state(local, sdata, sta, state, state - 1)); 472 473 return err; 474 } 475 476 /* 477 * should be called with sta_mtx locked 478 * this function replaces the mutex lock 479 * with a RCU lock 480 */ 481 static int sta_info_insert_finish(struct sta_info *sta) __acquires(RCU) 482 { 483 struct ieee80211_local *local = sta->local; 484 struct ieee80211_sub_if_data *sdata = sta->sdata; 485 struct station_info sinfo; 486 int err = 0; 487 488 lockdep_assert_held(&local->sta_mtx); 489 490 /* check if STA exists already */ 491 if (sta_info_get_bss(sdata, sta->sta.addr)) { 492 err = -EEXIST; 493 goto out_err; 494 } 495 496 local->num_sta++; 497 local->sta_generation++; 498 smp_mb(); 499 500 /* simplify things and don't accept BA sessions yet */ 501 set_sta_flag(sta, WLAN_STA_BLOCK_BA); 502 503 /* make the station visible */ 504 sta_info_hash_add(local, sta); 505 506 list_add_tail_rcu(&sta->list, &local->sta_list); 507 508 /* notify driver */ 509 err = sta_info_insert_drv_state(local, sdata, sta); 510 if (err) 511 goto out_remove; 512 513 set_sta_flag(sta, WLAN_STA_INSERTED); 514 /* accept BA sessions now */ 515 clear_sta_flag(sta, WLAN_STA_BLOCK_BA); 516 517 ieee80211_recalc_min_chandef(sdata); 518 ieee80211_sta_debugfs_add(sta); 519 rate_control_add_sta_debugfs(sta); 520 521 memset(&sinfo, 0, sizeof(sinfo)); 522 sinfo.filled = 0; 523 sinfo.generation = local->sta_generation; 524 cfg80211_new_sta(sdata->dev, sta->sta.addr, &sinfo, GFP_KERNEL); 525 526 sta_dbg(sdata, "Inserted STA %pM\n", sta->sta.addr); 527 528 /* move reference to rcu-protected */ 529 rcu_read_lock(); 530 mutex_unlock(&local->sta_mtx); 531 532 if (ieee80211_vif_is_mesh(&sdata->vif)) 533 mesh_accept_plinks_update(sdata); 534 535 return 0; 536 out_remove: 537 sta_info_hash_del(local, sta); 538 list_del_rcu(&sta->list); 539 local->num_sta--; 540 synchronize_net(); 541 __cleanup_single_sta(sta); 542 out_err: 543 mutex_unlock(&local->sta_mtx); 544 rcu_read_lock(); 545 return err; 546 } 547 548 int sta_info_insert_rcu(struct sta_info *sta) __acquires(RCU) 549 { 550 struct ieee80211_local *local = sta->local; 551 int err; 552 553 might_sleep(); 554 555 err = sta_info_insert_check(sta); 556 if (err) { 557 rcu_read_lock(); 558 goto out_free; 559 } 560 561 mutex_lock(&local->sta_mtx); 562 563 err = sta_info_insert_finish(sta); 564 if (err) 565 goto out_free; 566 567 return 0; 568 out_free: 569 sta_info_free(local, sta); 570 return err; 571 } 572 573 int sta_info_insert(struct sta_info *sta) 574 { 575 int err = sta_info_insert_rcu(sta); 576 577 rcu_read_unlock(); 578 579 return err; 580 } 581 582 static inline void __bss_tim_set(u8 *tim, u16 id) 583 { 584 /* 585 * This format has been mandated by the IEEE specifications, 586 * so this line may not be changed to use the __set_bit() format. 587 */ 588 tim[id / 8] |= (1 << (id % 8)); 589 } 590 591 static inline void __bss_tim_clear(u8 *tim, u16 id) 592 { 593 /* 594 * This format has been mandated by the IEEE specifications, 595 * so this line may not be changed to use the __clear_bit() format. 596 */ 597 tim[id / 8] &= ~(1 << (id % 8)); 598 } 599 600 static inline bool __bss_tim_get(u8 *tim, u16 id) 601 { 602 /* 603 * This format has been mandated by the IEEE specifications, 604 * so this line may not be changed to use the test_bit() format. 605 */ 606 return tim[id / 8] & (1 << (id % 8)); 607 } 608 609 static unsigned long ieee80211_tids_for_ac(int ac) 610 { 611 /* If we ever support TIDs > 7, this obviously needs to be adjusted */ 612 switch (ac) { 613 case IEEE80211_AC_VO: 614 return BIT(6) | BIT(7); 615 case IEEE80211_AC_VI: 616 return BIT(4) | BIT(5); 617 case IEEE80211_AC_BE: 618 return BIT(0) | BIT(3); 619 case IEEE80211_AC_BK: 620 return BIT(1) | BIT(2); 621 default: 622 WARN_ON(1); 623 return 0; 624 } 625 } 626 627 static void __sta_info_recalc_tim(struct sta_info *sta, bool ignore_pending) 628 { 629 struct ieee80211_local *local = sta->local; 630 struct ps_data *ps; 631 bool indicate_tim = false; 632 u8 ignore_for_tim = sta->sta.uapsd_queues; 633 int ac; 634 u16 id; 635 636 if (sta->sdata->vif.type == NL80211_IFTYPE_AP || 637 sta->sdata->vif.type == NL80211_IFTYPE_AP_VLAN) { 638 if (WARN_ON_ONCE(!sta->sdata->bss)) 639 return; 640 641 ps = &sta->sdata->bss->ps; 642 id = sta->sta.aid; 643 #ifdef CONFIG_MAC80211_MESH 644 } else if (ieee80211_vif_is_mesh(&sta->sdata->vif)) { 645 ps = &sta->sdata->u.mesh.ps; 646 /* TIM map only for 1 <= PLID <= IEEE80211_MAX_AID */ 647 id = sta->plid % (IEEE80211_MAX_AID + 1); 648 #endif 649 } else { 650 return; 651 } 652 653 /* No need to do anything if the driver does all */ 654 if (local->hw.flags & IEEE80211_HW_AP_LINK_PS) 655 return; 656 657 if (sta->dead) 658 goto done; 659 660 /* 661 * If all ACs are delivery-enabled then we should build 662 * the TIM bit for all ACs anyway; if only some are then 663 * we ignore those and build the TIM bit using only the 664 * non-enabled ones. 665 */ 666 if (ignore_for_tim == BIT(IEEE80211_NUM_ACS) - 1) 667 ignore_for_tim = 0; 668 669 if (ignore_pending) 670 ignore_for_tim = BIT(IEEE80211_NUM_ACS) - 1; 671 672 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) { 673 unsigned long tids; 674 675 if (ignore_for_tim & BIT(ac)) 676 continue; 677 678 indicate_tim |= !skb_queue_empty(&sta->tx_filtered[ac]) || 679 !skb_queue_empty(&sta->ps_tx_buf[ac]); 680 if (indicate_tim) 681 break; 682 683 tids = ieee80211_tids_for_ac(ac); 684 685 indicate_tim |= 686 sta->driver_buffered_tids & tids; 687 } 688 689 done: 690 spin_lock_bh(&local->tim_lock); 691 692 if (indicate_tim == __bss_tim_get(ps->tim, id)) 693 goto out_unlock; 694 695 if (indicate_tim) 696 __bss_tim_set(ps->tim, id); 697 else 698 __bss_tim_clear(ps->tim, id); 699 700 if (local->ops->set_tim && !WARN_ON(sta->dead)) { 701 local->tim_in_locked_section = true; 702 drv_set_tim(local, &sta->sta, indicate_tim); 703 local->tim_in_locked_section = false; 704 } 705 706 out_unlock: 707 spin_unlock_bh(&local->tim_lock); 708 } 709 710 void sta_info_recalc_tim(struct sta_info *sta) 711 { 712 __sta_info_recalc_tim(sta, false); 713 } 714 715 static bool sta_info_buffer_expired(struct sta_info *sta, struct sk_buff *skb) 716 { 717 struct ieee80211_tx_info *info; 718 int timeout; 719 720 if (!skb) 721 return false; 722 723 info = IEEE80211_SKB_CB(skb); 724 725 /* Timeout: (2 * listen_interval * beacon_int * 1024 / 1000000) sec */ 726 timeout = (sta->listen_interval * 727 sta->sdata->vif.bss_conf.beacon_int * 728 32 / 15625) * HZ; 729 if (timeout < STA_TX_BUFFER_EXPIRE) 730 timeout = STA_TX_BUFFER_EXPIRE; 731 return time_after(jiffies, info->control.jiffies + timeout); 732 } 733 734 735 static bool sta_info_cleanup_expire_buffered_ac(struct ieee80211_local *local, 736 struct sta_info *sta, int ac) 737 { 738 unsigned long flags; 739 struct sk_buff *skb; 740 741 /* 742 * First check for frames that should expire on the filtered 743 * queue. Frames here were rejected by the driver and are on 744 * a separate queue to avoid reordering with normal PS-buffered 745 * frames. They also aren't accounted for right now in the 746 * total_ps_buffered counter. 747 */ 748 for (;;) { 749 spin_lock_irqsave(&sta->tx_filtered[ac].lock, flags); 750 skb = skb_peek(&sta->tx_filtered[ac]); 751 if (sta_info_buffer_expired(sta, skb)) 752 skb = __skb_dequeue(&sta->tx_filtered[ac]); 753 else 754 skb = NULL; 755 spin_unlock_irqrestore(&sta->tx_filtered[ac].lock, flags); 756 757 /* 758 * Frames are queued in order, so if this one 759 * hasn't expired yet we can stop testing. If 760 * we actually reached the end of the queue we 761 * also need to stop, of course. 762 */ 763 if (!skb) 764 break; 765 ieee80211_free_txskb(&local->hw, skb); 766 } 767 768 /* 769 * Now also check the normal PS-buffered queue, this will 770 * only find something if the filtered queue was emptied 771 * since the filtered frames are all before the normal PS 772 * buffered frames. 773 */ 774 for (;;) { 775 spin_lock_irqsave(&sta->ps_tx_buf[ac].lock, flags); 776 skb = skb_peek(&sta->ps_tx_buf[ac]); 777 if (sta_info_buffer_expired(sta, skb)) 778 skb = __skb_dequeue(&sta->ps_tx_buf[ac]); 779 else 780 skb = NULL; 781 spin_unlock_irqrestore(&sta->ps_tx_buf[ac].lock, flags); 782 783 /* 784 * frames are queued in order, so if this one 785 * hasn't expired yet (or we reached the end of 786 * the queue) we can stop testing 787 */ 788 if (!skb) 789 break; 790 791 local->total_ps_buffered--; 792 ps_dbg(sta->sdata, "Buffered frame expired (STA %pM)\n", 793 sta->sta.addr); 794 ieee80211_free_txskb(&local->hw, skb); 795 } 796 797 /* 798 * Finally, recalculate the TIM bit for this station -- it might 799 * now be clear because the station was too slow to retrieve its 800 * frames. 801 */ 802 sta_info_recalc_tim(sta); 803 804 /* 805 * Return whether there are any frames still buffered, this is 806 * used to check whether the cleanup timer still needs to run, 807 * if there are no frames we don't need to rearm the timer. 808 */ 809 return !(skb_queue_empty(&sta->ps_tx_buf[ac]) && 810 skb_queue_empty(&sta->tx_filtered[ac])); 811 } 812 813 static bool sta_info_cleanup_expire_buffered(struct ieee80211_local *local, 814 struct sta_info *sta) 815 { 816 bool have_buffered = false; 817 int ac; 818 819 /* This is only necessary for stations on BSS/MBSS interfaces */ 820 if (!sta->sdata->bss && 821 !ieee80211_vif_is_mesh(&sta->sdata->vif)) 822 return false; 823 824 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) 825 have_buffered |= 826 sta_info_cleanup_expire_buffered_ac(local, sta, ac); 827 828 return have_buffered; 829 } 830 831 static int __must_check __sta_info_destroy_part1(struct sta_info *sta) 832 { 833 struct ieee80211_local *local; 834 struct ieee80211_sub_if_data *sdata; 835 int ret; 836 837 might_sleep(); 838 839 if (!sta) 840 return -ENOENT; 841 842 local = sta->local; 843 sdata = sta->sdata; 844 845 lockdep_assert_held(&local->sta_mtx); 846 847 /* 848 * Before removing the station from the driver and 849 * rate control, it might still start new aggregation 850 * sessions -- block that to make sure the tear-down 851 * will be sufficient. 852 */ 853 set_sta_flag(sta, WLAN_STA_BLOCK_BA); 854 ieee80211_sta_tear_down_BA_sessions(sta, AGG_STOP_DESTROY_STA); 855 856 ret = sta_info_hash_del(local, sta); 857 if (WARN_ON(ret)) 858 return ret; 859 860 /* 861 * for TDLS peers, make sure to return to the base channel before 862 * removal. 863 */ 864 if (test_sta_flag(sta, WLAN_STA_TDLS_OFF_CHANNEL)) { 865 drv_tdls_cancel_channel_switch(local, sdata, &sta->sta); 866 clear_sta_flag(sta, WLAN_STA_TDLS_OFF_CHANNEL); 867 } 868 869 list_del_rcu(&sta->list); 870 871 drv_sta_pre_rcu_remove(local, sta->sdata, sta); 872 873 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN && 874 rcu_access_pointer(sdata->u.vlan.sta) == sta) 875 RCU_INIT_POINTER(sdata->u.vlan.sta, NULL); 876 877 return 0; 878 } 879 880 static void __sta_info_destroy_part2(struct sta_info *sta) 881 { 882 struct ieee80211_local *local = sta->local; 883 struct ieee80211_sub_if_data *sdata = sta->sdata; 884 struct station_info sinfo = {}; 885 int ret; 886 887 /* 888 * NOTE: This assumes at least synchronize_net() was done 889 * after _part1 and before _part2! 890 */ 891 892 might_sleep(); 893 lockdep_assert_held(&local->sta_mtx); 894 895 /* now keys can no longer be reached */ 896 ieee80211_free_sta_keys(local, sta); 897 898 /* disable TIM bit - last chance to tell driver */ 899 __sta_info_recalc_tim(sta, true); 900 901 sta->dead = true; 902 903 local->num_sta--; 904 local->sta_generation++; 905 906 while (sta->sta_state > IEEE80211_STA_NONE) { 907 ret = sta_info_move_state(sta, sta->sta_state - 1); 908 if (ret) { 909 WARN_ON_ONCE(1); 910 break; 911 } 912 } 913 914 if (sta->uploaded) { 915 ret = drv_sta_state(local, sdata, sta, IEEE80211_STA_NONE, 916 IEEE80211_STA_NOTEXIST); 917 WARN_ON_ONCE(ret != 0); 918 } 919 920 sta_dbg(sdata, "Removed STA %pM\n", sta->sta.addr); 921 922 sta_set_sinfo(sta, &sinfo); 923 cfg80211_del_sta_sinfo(sdata->dev, sta->sta.addr, &sinfo, GFP_KERNEL); 924 925 rate_control_remove_sta_debugfs(sta); 926 ieee80211_sta_debugfs_remove(sta); 927 ieee80211_recalc_min_chandef(sdata); 928 929 cleanup_single_sta(sta); 930 } 931 932 int __must_check __sta_info_destroy(struct sta_info *sta) 933 { 934 int err = __sta_info_destroy_part1(sta); 935 936 if (err) 937 return err; 938 939 synchronize_net(); 940 941 __sta_info_destroy_part2(sta); 942 943 return 0; 944 } 945 946 int sta_info_destroy_addr(struct ieee80211_sub_if_data *sdata, const u8 *addr) 947 { 948 struct sta_info *sta; 949 int ret; 950 951 mutex_lock(&sdata->local->sta_mtx); 952 sta = sta_info_get(sdata, addr); 953 ret = __sta_info_destroy(sta); 954 mutex_unlock(&sdata->local->sta_mtx); 955 956 return ret; 957 } 958 959 int sta_info_destroy_addr_bss(struct ieee80211_sub_if_data *sdata, 960 const u8 *addr) 961 { 962 struct sta_info *sta; 963 int ret; 964 965 mutex_lock(&sdata->local->sta_mtx); 966 sta = sta_info_get_bss(sdata, addr); 967 ret = __sta_info_destroy(sta); 968 mutex_unlock(&sdata->local->sta_mtx); 969 970 return ret; 971 } 972 973 static void sta_info_cleanup(unsigned long data) 974 { 975 struct ieee80211_local *local = (struct ieee80211_local *) data; 976 struct sta_info *sta; 977 bool timer_needed = false; 978 979 rcu_read_lock(); 980 list_for_each_entry_rcu(sta, &local->sta_list, list) 981 if (sta_info_cleanup_expire_buffered(local, sta)) 982 timer_needed = true; 983 rcu_read_unlock(); 984 985 if (local->quiescing) 986 return; 987 988 if (!timer_needed) 989 return; 990 991 mod_timer(&local->sta_cleanup, 992 round_jiffies(jiffies + STA_INFO_CLEANUP_INTERVAL)); 993 } 994 995 void sta_info_init(struct ieee80211_local *local) 996 { 997 spin_lock_init(&local->tim_lock); 998 mutex_init(&local->sta_mtx); 999 INIT_LIST_HEAD(&local->sta_list); 1000 1001 setup_timer(&local->sta_cleanup, sta_info_cleanup, 1002 (unsigned long)local); 1003 } 1004 1005 void sta_info_stop(struct ieee80211_local *local) 1006 { 1007 del_timer_sync(&local->sta_cleanup); 1008 } 1009 1010 1011 int __sta_info_flush(struct ieee80211_sub_if_data *sdata, bool vlans) 1012 { 1013 struct ieee80211_local *local = sdata->local; 1014 struct sta_info *sta, *tmp; 1015 LIST_HEAD(free_list); 1016 int ret = 0; 1017 1018 might_sleep(); 1019 1020 WARN_ON(vlans && sdata->vif.type != NL80211_IFTYPE_AP); 1021 WARN_ON(vlans && !sdata->bss); 1022 1023 mutex_lock(&local->sta_mtx); 1024 list_for_each_entry_safe(sta, tmp, &local->sta_list, list) { 1025 if (sdata == sta->sdata || 1026 (vlans && sdata->bss == sta->sdata->bss)) { 1027 if (!WARN_ON(__sta_info_destroy_part1(sta))) 1028 list_add(&sta->free_list, &free_list); 1029 ret++; 1030 } 1031 } 1032 1033 if (!list_empty(&free_list)) { 1034 synchronize_net(); 1035 list_for_each_entry_safe(sta, tmp, &free_list, free_list) 1036 __sta_info_destroy_part2(sta); 1037 } 1038 mutex_unlock(&local->sta_mtx); 1039 1040 return ret; 1041 } 1042 1043 void ieee80211_sta_expire(struct ieee80211_sub_if_data *sdata, 1044 unsigned long exp_time) 1045 { 1046 struct ieee80211_local *local = sdata->local; 1047 struct sta_info *sta, *tmp; 1048 1049 mutex_lock(&local->sta_mtx); 1050 1051 list_for_each_entry_safe(sta, tmp, &local->sta_list, list) { 1052 if (sdata != sta->sdata) 1053 continue; 1054 1055 if (time_after(jiffies, sta->last_rx + exp_time)) { 1056 sta_dbg(sta->sdata, "expiring inactive STA %pM\n", 1057 sta->sta.addr); 1058 1059 if (ieee80211_vif_is_mesh(&sdata->vif) && 1060 test_sta_flag(sta, WLAN_STA_PS_STA)) 1061 atomic_dec(&sdata->u.mesh.ps.num_sta_ps); 1062 1063 WARN_ON(__sta_info_destroy(sta)); 1064 } 1065 } 1066 1067 mutex_unlock(&local->sta_mtx); 1068 } 1069 1070 struct ieee80211_sta *ieee80211_find_sta_by_ifaddr(struct ieee80211_hw *hw, 1071 const u8 *addr, 1072 const u8 *localaddr) 1073 { 1074 struct sta_info *sta, *nxt; 1075 1076 /* 1077 * Just return a random station if localaddr is NULL 1078 * ... first in list. 1079 */ 1080 for_each_sta_info(hw_to_local(hw), addr, sta, nxt) { 1081 if (localaddr && 1082 !ether_addr_equal(sta->sdata->vif.addr, localaddr)) 1083 continue; 1084 if (!sta->uploaded) 1085 return NULL; 1086 return &sta->sta; 1087 } 1088 1089 return NULL; 1090 } 1091 EXPORT_SYMBOL_GPL(ieee80211_find_sta_by_ifaddr); 1092 1093 struct ieee80211_sta *ieee80211_find_sta(struct ieee80211_vif *vif, 1094 const u8 *addr) 1095 { 1096 struct sta_info *sta; 1097 1098 if (!vif) 1099 return NULL; 1100 1101 sta = sta_info_get_bss(vif_to_sdata(vif), addr); 1102 if (!sta) 1103 return NULL; 1104 1105 if (!sta->uploaded) 1106 return NULL; 1107 1108 return &sta->sta; 1109 } 1110 EXPORT_SYMBOL(ieee80211_find_sta); 1111 1112 /* powersave support code */ 1113 void ieee80211_sta_ps_deliver_wakeup(struct sta_info *sta) 1114 { 1115 struct ieee80211_sub_if_data *sdata = sta->sdata; 1116 struct ieee80211_local *local = sdata->local; 1117 struct sk_buff_head pending; 1118 int filtered = 0, buffered = 0, ac; 1119 unsigned long flags; 1120 struct ps_data *ps; 1121 1122 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) 1123 sdata = container_of(sdata->bss, struct ieee80211_sub_if_data, 1124 u.ap); 1125 1126 if (sdata->vif.type == NL80211_IFTYPE_AP) 1127 ps = &sdata->bss->ps; 1128 else if (ieee80211_vif_is_mesh(&sdata->vif)) 1129 ps = &sdata->u.mesh.ps; 1130 else 1131 return; 1132 1133 clear_sta_flag(sta, WLAN_STA_SP); 1134 1135 BUILD_BUG_ON(BITS_TO_LONGS(IEEE80211_NUM_TIDS) > 1); 1136 sta->driver_buffered_tids = 0; 1137 1138 if (!(local->hw.flags & IEEE80211_HW_AP_LINK_PS)) 1139 drv_sta_notify(local, sdata, STA_NOTIFY_AWAKE, &sta->sta); 1140 1141 skb_queue_head_init(&pending); 1142 1143 /* sync with ieee80211_tx_h_unicast_ps_buf */ 1144 spin_lock(&sta->ps_lock); 1145 /* Send all buffered frames to the station */ 1146 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) { 1147 int count = skb_queue_len(&pending), tmp; 1148 1149 spin_lock_irqsave(&sta->tx_filtered[ac].lock, flags); 1150 skb_queue_splice_tail_init(&sta->tx_filtered[ac], &pending); 1151 spin_unlock_irqrestore(&sta->tx_filtered[ac].lock, flags); 1152 tmp = skb_queue_len(&pending); 1153 filtered += tmp - count; 1154 count = tmp; 1155 1156 spin_lock_irqsave(&sta->ps_tx_buf[ac].lock, flags); 1157 skb_queue_splice_tail_init(&sta->ps_tx_buf[ac], &pending); 1158 spin_unlock_irqrestore(&sta->ps_tx_buf[ac].lock, flags); 1159 tmp = skb_queue_len(&pending); 1160 buffered += tmp - count; 1161 } 1162 1163 ieee80211_add_pending_skbs(local, &pending); 1164 1165 /* now we're no longer in the deliver code */ 1166 clear_sta_flag(sta, WLAN_STA_PS_DELIVER); 1167 1168 /* The station might have polled and then woken up before we responded, 1169 * so clear these flags now to avoid them sticking around. 1170 */ 1171 clear_sta_flag(sta, WLAN_STA_PSPOLL); 1172 clear_sta_flag(sta, WLAN_STA_UAPSD); 1173 spin_unlock(&sta->ps_lock); 1174 1175 atomic_dec(&ps->num_sta_ps); 1176 1177 /* This station just woke up and isn't aware of our SMPS state */ 1178 if (!ieee80211_vif_is_mesh(&sdata->vif) && 1179 !ieee80211_smps_is_restrictive(sta->known_smps_mode, 1180 sdata->smps_mode) && 1181 sta->known_smps_mode != sdata->bss->req_smps && 1182 sta_info_tx_streams(sta) != 1) { 1183 ht_dbg(sdata, 1184 "%pM just woke up and MIMO capable - update SMPS\n", 1185 sta->sta.addr); 1186 ieee80211_send_smps_action(sdata, sdata->bss->req_smps, 1187 sta->sta.addr, 1188 sdata->vif.bss_conf.bssid); 1189 } 1190 1191 local->total_ps_buffered -= buffered; 1192 1193 sta_info_recalc_tim(sta); 1194 1195 ps_dbg(sdata, 1196 "STA %pM aid %d sending %d filtered/%d PS frames since STA not sleeping anymore\n", 1197 sta->sta.addr, sta->sta.aid, filtered, buffered); 1198 } 1199 1200 static void ieee80211_send_null_response(struct ieee80211_sub_if_data *sdata, 1201 struct sta_info *sta, int tid, 1202 enum ieee80211_frame_release_type reason, 1203 bool call_driver) 1204 { 1205 struct ieee80211_local *local = sdata->local; 1206 struct ieee80211_qos_hdr *nullfunc; 1207 struct sk_buff *skb; 1208 int size = sizeof(*nullfunc); 1209 __le16 fc; 1210 bool qos = sta->sta.wme; 1211 struct ieee80211_tx_info *info; 1212 struct ieee80211_chanctx_conf *chanctx_conf; 1213 1214 if (qos) { 1215 fc = cpu_to_le16(IEEE80211_FTYPE_DATA | 1216 IEEE80211_STYPE_QOS_NULLFUNC | 1217 IEEE80211_FCTL_FROMDS); 1218 } else { 1219 size -= 2; 1220 fc = cpu_to_le16(IEEE80211_FTYPE_DATA | 1221 IEEE80211_STYPE_NULLFUNC | 1222 IEEE80211_FCTL_FROMDS); 1223 } 1224 1225 skb = dev_alloc_skb(local->hw.extra_tx_headroom + size); 1226 if (!skb) 1227 return; 1228 1229 skb_reserve(skb, local->hw.extra_tx_headroom); 1230 1231 nullfunc = (void *) skb_put(skb, size); 1232 nullfunc->frame_control = fc; 1233 nullfunc->duration_id = 0; 1234 memcpy(nullfunc->addr1, sta->sta.addr, ETH_ALEN); 1235 memcpy(nullfunc->addr2, sdata->vif.addr, ETH_ALEN); 1236 memcpy(nullfunc->addr3, sdata->vif.addr, ETH_ALEN); 1237 nullfunc->seq_ctrl = 0; 1238 1239 skb->priority = tid; 1240 skb_set_queue_mapping(skb, ieee802_1d_to_ac[tid]); 1241 if (qos) { 1242 nullfunc->qos_ctrl = cpu_to_le16(tid); 1243 1244 if (reason == IEEE80211_FRAME_RELEASE_UAPSD) 1245 nullfunc->qos_ctrl |= 1246 cpu_to_le16(IEEE80211_QOS_CTL_EOSP); 1247 } 1248 1249 info = IEEE80211_SKB_CB(skb); 1250 1251 /* 1252 * Tell TX path to send this frame even though the 1253 * STA may still remain is PS mode after this frame 1254 * exchange. Also set EOSP to indicate this packet 1255 * ends the poll/service period. 1256 */ 1257 info->flags |= IEEE80211_TX_CTL_NO_PS_BUFFER | 1258 IEEE80211_TX_STATUS_EOSP | 1259 IEEE80211_TX_CTL_REQ_TX_STATUS; 1260 1261 info->control.flags |= IEEE80211_TX_CTRL_PS_RESPONSE; 1262 1263 if (call_driver) 1264 drv_allow_buffered_frames(local, sta, BIT(tid), 1, 1265 reason, false); 1266 1267 skb->dev = sdata->dev; 1268 1269 rcu_read_lock(); 1270 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf); 1271 if (WARN_ON(!chanctx_conf)) { 1272 rcu_read_unlock(); 1273 kfree_skb(skb); 1274 return; 1275 } 1276 1277 info->band = chanctx_conf->def.chan->band; 1278 ieee80211_xmit(sdata, skb); 1279 rcu_read_unlock(); 1280 } 1281 1282 static int find_highest_prio_tid(unsigned long tids) 1283 { 1284 /* lower 3 TIDs aren't ordered perfectly */ 1285 if (tids & 0xF8) 1286 return fls(tids) - 1; 1287 /* TID 0 is BE just like TID 3 */ 1288 if (tids & BIT(0)) 1289 return 0; 1290 return fls(tids) - 1; 1291 } 1292 1293 static void 1294 ieee80211_sta_ps_deliver_response(struct sta_info *sta, 1295 int n_frames, u8 ignored_acs, 1296 enum ieee80211_frame_release_type reason) 1297 { 1298 struct ieee80211_sub_if_data *sdata = sta->sdata; 1299 struct ieee80211_local *local = sdata->local; 1300 bool more_data = false; 1301 int ac; 1302 unsigned long driver_release_tids = 0; 1303 struct sk_buff_head frames; 1304 1305 /* Service or PS-Poll period starts */ 1306 set_sta_flag(sta, WLAN_STA_SP); 1307 1308 __skb_queue_head_init(&frames); 1309 1310 /* Get response frame(s) and more data bit for the last one. */ 1311 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) { 1312 unsigned long tids; 1313 1314 if (ignored_acs & BIT(ac)) 1315 continue; 1316 1317 tids = ieee80211_tids_for_ac(ac); 1318 1319 /* if we already have frames from software, then we can't also 1320 * release from hardware queues 1321 */ 1322 if (skb_queue_empty(&frames)) 1323 driver_release_tids |= sta->driver_buffered_tids & tids; 1324 1325 if (driver_release_tids) { 1326 /* If the driver has data on more than one TID then 1327 * certainly there's more data if we release just a 1328 * single frame now (from a single TID). This will 1329 * only happen for PS-Poll. 1330 */ 1331 if (reason == IEEE80211_FRAME_RELEASE_PSPOLL && 1332 hweight16(driver_release_tids) > 1) { 1333 more_data = true; 1334 driver_release_tids = 1335 BIT(find_highest_prio_tid( 1336 driver_release_tids)); 1337 break; 1338 } 1339 } else { 1340 struct sk_buff *skb; 1341 1342 while (n_frames > 0) { 1343 skb = skb_dequeue(&sta->tx_filtered[ac]); 1344 if (!skb) { 1345 skb = skb_dequeue( 1346 &sta->ps_tx_buf[ac]); 1347 if (skb) 1348 local->total_ps_buffered--; 1349 } 1350 if (!skb) 1351 break; 1352 n_frames--; 1353 __skb_queue_tail(&frames, skb); 1354 } 1355 } 1356 1357 /* If we have more frames buffered on this AC, then set the 1358 * more-data bit and abort the loop since we can't send more 1359 * data from other ACs before the buffered frames from this. 1360 */ 1361 if (!skb_queue_empty(&sta->tx_filtered[ac]) || 1362 !skb_queue_empty(&sta->ps_tx_buf[ac])) { 1363 more_data = true; 1364 break; 1365 } 1366 } 1367 1368 if (skb_queue_empty(&frames) && !driver_release_tids) { 1369 int tid; 1370 1371 /* 1372 * For PS-Poll, this can only happen due to a race condition 1373 * when we set the TIM bit and the station notices it, but 1374 * before it can poll for the frame we expire it. 1375 * 1376 * For uAPSD, this is said in the standard (11.2.1.5 h): 1377 * At each unscheduled SP for a non-AP STA, the AP shall 1378 * attempt to transmit at least one MSDU or MMPDU, but no 1379 * more than the value specified in the Max SP Length field 1380 * in the QoS Capability element from delivery-enabled ACs, 1381 * that are destined for the non-AP STA. 1382 * 1383 * Since we have no other MSDU/MMPDU, transmit a QoS null frame. 1384 */ 1385 1386 /* This will evaluate to 1, 3, 5 or 7. */ 1387 tid = 7 - ((ffs(~ignored_acs) - 1) << 1); 1388 1389 ieee80211_send_null_response(sdata, sta, tid, reason, true); 1390 } else if (!driver_release_tids) { 1391 struct sk_buff_head pending; 1392 struct sk_buff *skb; 1393 int num = 0; 1394 u16 tids = 0; 1395 bool need_null = false; 1396 1397 skb_queue_head_init(&pending); 1398 1399 while ((skb = __skb_dequeue(&frames))) { 1400 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); 1401 struct ieee80211_hdr *hdr = (void *) skb->data; 1402 u8 *qoshdr = NULL; 1403 1404 num++; 1405 1406 /* 1407 * Tell TX path to send this frame even though the 1408 * STA may still remain is PS mode after this frame 1409 * exchange. 1410 */ 1411 info->flags |= IEEE80211_TX_CTL_NO_PS_BUFFER; 1412 info->control.flags |= IEEE80211_TX_CTRL_PS_RESPONSE; 1413 1414 /* 1415 * Use MoreData flag to indicate whether there are 1416 * more buffered frames for this STA 1417 */ 1418 if (more_data || !skb_queue_empty(&frames)) 1419 hdr->frame_control |= 1420 cpu_to_le16(IEEE80211_FCTL_MOREDATA); 1421 else 1422 hdr->frame_control &= 1423 cpu_to_le16(~IEEE80211_FCTL_MOREDATA); 1424 1425 if (ieee80211_is_data_qos(hdr->frame_control) || 1426 ieee80211_is_qos_nullfunc(hdr->frame_control)) 1427 qoshdr = ieee80211_get_qos_ctl(hdr); 1428 1429 tids |= BIT(skb->priority); 1430 1431 __skb_queue_tail(&pending, skb); 1432 1433 /* end service period after last frame or add one */ 1434 if (!skb_queue_empty(&frames)) 1435 continue; 1436 1437 if (reason != IEEE80211_FRAME_RELEASE_UAPSD) { 1438 /* for PS-Poll, there's only one frame */ 1439 info->flags |= IEEE80211_TX_STATUS_EOSP | 1440 IEEE80211_TX_CTL_REQ_TX_STATUS; 1441 break; 1442 } 1443 1444 /* For uAPSD, things are a bit more complicated. If the 1445 * last frame has a QoS header (i.e. is a QoS-data or 1446 * QoS-nulldata frame) then just set the EOSP bit there 1447 * and be done. 1448 * If the frame doesn't have a QoS header (which means 1449 * it should be a bufferable MMPDU) then we can't set 1450 * the EOSP bit in the QoS header; add a QoS-nulldata 1451 * frame to the list to send it after the MMPDU. 1452 * 1453 * Note that this code is only in the mac80211-release 1454 * code path, we assume that the driver will not buffer 1455 * anything but QoS-data frames, or if it does, will 1456 * create the QoS-nulldata frame by itself if needed. 1457 * 1458 * Cf. 802.11-2012 10.2.1.10 (c). 1459 */ 1460 if (qoshdr) { 1461 *qoshdr |= IEEE80211_QOS_CTL_EOSP; 1462 1463 info->flags |= IEEE80211_TX_STATUS_EOSP | 1464 IEEE80211_TX_CTL_REQ_TX_STATUS; 1465 } else { 1466 /* The standard isn't completely clear on this 1467 * as it says the more-data bit should be set 1468 * if there are more BUs. The QoS-Null frame 1469 * we're about to send isn't buffered yet, we 1470 * only create it below, but let's pretend it 1471 * was buffered just in case some clients only 1472 * expect more-data=0 when eosp=1. 1473 */ 1474 hdr->frame_control |= 1475 cpu_to_le16(IEEE80211_FCTL_MOREDATA); 1476 need_null = true; 1477 num++; 1478 } 1479 break; 1480 } 1481 1482 drv_allow_buffered_frames(local, sta, tids, num, 1483 reason, more_data); 1484 1485 ieee80211_add_pending_skbs(local, &pending); 1486 1487 if (need_null) 1488 ieee80211_send_null_response( 1489 sdata, sta, find_highest_prio_tid(tids), 1490 reason, false); 1491 1492 sta_info_recalc_tim(sta); 1493 } else { 1494 /* 1495 * We need to release a frame that is buffered somewhere in the 1496 * driver ... it'll have to handle that. 1497 * Note that the driver also has to check the number of frames 1498 * on the TIDs we're releasing from - if there are more than 1499 * n_frames it has to set the more-data bit (if we didn't ask 1500 * it to set it anyway due to other buffered frames); if there 1501 * are fewer than n_frames it has to make sure to adjust that 1502 * to allow the service period to end properly. 1503 */ 1504 drv_release_buffered_frames(local, sta, driver_release_tids, 1505 n_frames, reason, more_data); 1506 1507 /* 1508 * Note that we don't recalculate the TIM bit here as it would 1509 * most likely have no effect at all unless the driver told us 1510 * that the TID(s) became empty before returning here from the 1511 * release function. 1512 * Either way, however, when the driver tells us that the TID(s) 1513 * became empty we'll do the TIM recalculation. 1514 */ 1515 } 1516 } 1517 1518 void ieee80211_sta_ps_deliver_poll_response(struct sta_info *sta) 1519 { 1520 u8 ignore_for_response = sta->sta.uapsd_queues; 1521 1522 /* 1523 * If all ACs are delivery-enabled then we should reply 1524 * from any of them, if only some are enabled we reply 1525 * only from the non-enabled ones. 1526 */ 1527 if (ignore_for_response == BIT(IEEE80211_NUM_ACS) - 1) 1528 ignore_for_response = 0; 1529 1530 ieee80211_sta_ps_deliver_response(sta, 1, ignore_for_response, 1531 IEEE80211_FRAME_RELEASE_PSPOLL); 1532 } 1533 1534 void ieee80211_sta_ps_deliver_uapsd(struct sta_info *sta) 1535 { 1536 int n_frames = sta->sta.max_sp; 1537 u8 delivery_enabled = sta->sta.uapsd_queues; 1538 1539 /* 1540 * If we ever grow support for TSPEC this might happen if 1541 * the TSPEC update from hostapd comes in between a trigger 1542 * frame setting WLAN_STA_UAPSD in the RX path and this 1543 * actually getting called. 1544 */ 1545 if (!delivery_enabled) 1546 return; 1547 1548 switch (sta->sta.max_sp) { 1549 case 1: 1550 n_frames = 2; 1551 break; 1552 case 2: 1553 n_frames = 4; 1554 break; 1555 case 3: 1556 n_frames = 6; 1557 break; 1558 case 0: 1559 /* XXX: what is a good value? */ 1560 n_frames = 128; 1561 break; 1562 } 1563 1564 ieee80211_sta_ps_deliver_response(sta, n_frames, ~delivery_enabled, 1565 IEEE80211_FRAME_RELEASE_UAPSD); 1566 } 1567 1568 void ieee80211_sta_block_awake(struct ieee80211_hw *hw, 1569 struct ieee80211_sta *pubsta, bool block) 1570 { 1571 struct sta_info *sta = container_of(pubsta, struct sta_info, sta); 1572 1573 trace_api_sta_block_awake(sta->local, pubsta, block); 1574 1575 if (block) { 1576 set_sta_flag(sta, WLAN_STA_PS_DRIVER); 1577 return; 1578 } 1579 1580 if (!test_sta_flag(sta, WLAN_STA_PS_DRIVER)) 1581 return; 1582 1583 if (!test_sta_flag(sta, WLAN_STA_PS_STA)) { 1584 set_sta_flag(sta, WLAN_STA_PS_DELIVER); 1585 clear_sta_flag(sta, WLAN_STA_PS_DRIVER); 1586 ieee80211_queue_work(hw, &sta->drv_deliver_wk); 1587 } else if (test_sta_flag(sta, WLAN_STA_PSPOLL) || 1588 test_sta_flag(sta, WLAN_STA_UAPSD)) { 1589 /* must be asleep in this case */ 1590 clear_sta_flag(sta, WLAN_STA_PS_DRIVER); 1591 ieee80211_queue_work(hw, &sta->drv_deliver_wk); 1592 } else { 1593 clear_sta_flag(sta, WLAN_STA_PS_DRIVER); 1594 } 1595 } 1596 EXPORT_SYMBOL(ieee80211_sta_block_awake); 1597 1598 void ieee80211_sta_eosp(struct ieee80211_sta *pubsta) 1599 { 1600 struct sta_info *sta = container_of(pubsta, struct sta_info, sta); 1601 struct ieee80211_local *local = sta->local; 1602 1603 trace_api_eosp(local, pubsta); 1604 1605 clear_sta_flag(sta, WLAN_STA_SP); 1606 } 1607 EXPORT_SYMBOL(ieee80211_sta_eosp); 1608 1609 void ieee80211_sta_set_buffered(struct ieee80211_sta *pubsta, 1610 u8 tid, bool buffered) 1611 { 1612 struct sta_info *sta = container_of(pubsta, struct sta_info, sta); 1613 1614 if (WARN_ON(tid >= IEEE80211_NUM_TIDS)) 1615 return; 1616 1617 trace_api_sta_set_buffered(sta->local, pubsta, tid, buffered); 1618 1619 if (buffered) 1620 set_bit(tid, &sta->driver_buffered_tids); 1621 else 1622 clear_bit(tid, &sta->driver_buffered_tids); 1623 1624 sta_info_recalc_tim(sta); 1625 } 1626 EXPORT_SYMBOL(ieee80211_sta_set_buffered); 1627 1628 int sta_info_move_state(struct sta_info *sta, 1629 enum ieee80211_sta_state new_state) 1630 { 1631 might_sleep(); 1632 1633 if (sta->sta_state == new_state) 1634 return 0; 1635 1636 /* check allowed transitions first */ 1637 1638 switch (new_state) { 1639 case IEEE80211_STA_NONE: 1640 if (sta->sta_state != IEEE80211_STA_AUTH) 1641 return -EINVAL; 1642 break; 1643 case IEEE80211_STA_AUTH: 1644 if (sta->sta_state != IEEE80211_STA_NONE && 1645 sta->sta_state != IEEE80211_STA_ASSOC) 1646 return -EINVAL; 1647 break; 1648 case IEEE80211_STA_ASSOC: 1649 if (sta->sta_state != IEEE80211_STA_AUTH && 1650 sta->sta_state != IEEE80211_STA_AUTHORIZED) 1651 return -EINVAL; 1652 break; 1653 case IEEE80211_STA_AUTHORIZED: 1654 if (sta->sta_state != IEEE80211_STA_ASSOC) 1655 return -EINVAL; 1656 break; 1657 default: 1658 WARN(1, "invalid state %d", new_state); 1659 return -EINVAL; 1660 } 1661 1662 sta_dbg(sta->sdata, "moving STA %pM to state %d\n", 1663 sta->sta.addr, new_state); 1664 1665 /* 1666 * notify the driver before the actual changes so it can 1667 * fail the transition 1668 */ 1669 if (test_sta_flag(sta, WLAN_STA_INSERTED)) { 1670 int err = drv_sta_state(sta->local, sta->sdata, sta, 1671 sta->sta_state, new_state); 1672 if (err) 1673 return err; 1674 } 1675 1676 /* reflect the change in all state variables */ 1677 1678 switch (new_state) { 1679 case IEEE80211_STA_NONE: 1680 if (sta->sta_state == IEEE80211_STA_AUTH) 1681 clear_bit(WLAN_STA_AUTH, &sta->_flags); 1682 break; 1683 case IEEE80211_STA_AUTH: 1684 if (sta->sta_state == IEEE80211_STA_NONE) 1685 set_bit(WLAN_STA_AUTH, &sta->_flags); 1686 else if (sta->sta_state == IEEE80211_STA_ASSOC) 1687 clear_bit(WLAN_STA_ASSOC, &sta->_flags); 1688 break; 1689 case IEEE80211_STA_ASSOC: 1690 if (sta->sta_state == IEEE80211_STA_AUTH) { 1691 set_bit(WLAN_STA_ASSOC, &sta->_flags); 1692 } else if (sta->sta_state == IEEE80211_STA_AUTHORIZED) { 1693 if (sta->sdata->vif.type == NL80211_IFTYPE_AP || 1694 (sta->sdata->vif.type == NL80211_IFTYPE_AP_VLAN && 1695 !sta->sdata->u.vlan.sta)) 1696 atomic_dec(&sta->sdata->bss->num_mcast_sta); 1697 clear_bit(WLAN_STA_AUTHORIZED, &sta->_flags); 1698 } 1699 break; 1700 case IEEE80211_STA_AUTHORIZED: 1701 if (sta->sta_state == IEEE80211_STA_ASSOC) { 1702 if (sta->sdata->vif.type == NL80211_IFTYPE_AP || 1703 (sta->sdata->vif.type == NL80211_IFTYPE_AP_VLAN && 1704 !sta->sdata->u.vlan.sta)) 1705 atomic_inc(&sta->sdata->bss->num_mcast_sta); 1706 set_bit(WLAN_STA_AUTHORIZED, &sta->_flags); 1707 } 1708 break; 1709 default: 1710 break; 1711 } 1712 1713 sta->sta_state = new_state; 1714 1715 return 0; 1716 } 1717 1718 u8 sta_info_tx_streams(struct sta_info *sta) 1719 { 1720 struct ieee80211_sta_ht_cap *ht_cap = &sta->sta.ht_cap; 1721 u8 rx_streams; 1722 1723 if (!sta->sta.ht_cap.ht_supported) 1724 return 1; 1725 1726 if (sta->sta.vht_cap.vht_supported) { 1727 int i; 1728 u16 tx_mcs_map = 1729 le16_to_cpu(sta->sta.vht_cap.vht_mcs.tx_mcs_map); 1730 1731 for (i = 7; i >= 0; i--) 1732 if ((tx_mcs_map & (0x3 << (i * 2))) != 1733 IEEE80211_VHT_MCS_NOT_SUPPORTED) 1734 return i + 1; 1735 } 1736 1737 if (ht_cap->mcs.rx_mask[3]) 1738 rx_streams = 4; 1739 else if (ht_cap->mcs.rx_mask[2]) 1740 rx_streams = 3; 1741 else if (ht_cap->mcs.rx_mask[1]) 1742 rx_streams = 2; 1743 else 1744 rx_streams = 1; 1745 1746 if (!(ht_cap->mcs.tx_params & IEEE80211_HT_MCS_TX_RX_DIFF)) 1747 return rx_streams; 1748 1749 return ((ht_cap->mcs.tx_params & IEEE80211_HT_MCS_TX_MAX_STREAMS_MASK) 1750 >> IEEE80211_HT_MCS_TX_MAX_STREAMS_SHIFT) + 1; 1751 } 1752 1753 void sta_set_sinfo(struct sta_info *sta, struct station_info *sinfo) 1754 { 1755 struct ieee80211_sub_if_data *sdata = sta->sdata; 1756 struct ieee80211_local *local = sdata->local; 1757 struct rate_control_ref *ref = NULL; 1758 struct timespec uptime; 1759 u32 thr = 0; 1760 int i, ac; 1761 1762 if (test_sta_flag(sta, WLAN_STA_RATE_CONTROL)) 1763 ref = local->rate_ctrl; 1764 1765 sinfo->generation = sdata->local->sta_generation; 1766 1767 /* do before driver, so beacon filtering drivers have a 1768 * chance to e.g. just add the number of filtered beacons 1769 * (or just modify the value entirely, of course) 1770 */ 1771 if (sdata->vif.type == NL80211_IFTYPE_STATION) 1772 sinfo->rx_beacon = sdata->u.mgd.count_beacon_signal; 1773 1774 drv_sta_statistics(local, sdata, &sta->sta, sinfo); 1775 1776 sinfo->filled |= BIT(NL80211_STA_INFO_INACTIVE_TIME) | 1777 BIT(NL80211_STA_INFO_STA_FLAGS) | 1778 BIT(NL80211_STA_INFO_BSS_PARAM) | 1779 BIT(NL80211_STA_INFO_CONNECTED_TIME) | 1780 BIT(NL80211_STA_INFO_RX_DROP_MISC) | 1781 BIT(NL80211_STA_INFO_BEACON_LOSS); 1782 1783 ktime_get_ts(&uptime); 1784 sinfo->connected_time = uptime.tv_sec - sta->last_connected; 1785 sinfo->inactive_time = jiffies_to_msecs(jiffies - sta->last_rx); 1786 1787 if (!(sinfo->filled & (BIT(NL80211_STA_INFO_TX_BYTES64) | 1788 BIT(NL80211_STA_INFO_TX_BYTES)))) { 1789 sinfo->tx_bytes = 0; 1790 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) 1791 sinfo->tx_bytes += sta->tx_bytes[ac]; 1792 sinfo->filled |= BIT(NL80211_STA_INFO_TX_BYTES64); 1793 } 1794 1795 if (!(sinfo->filled & BIT(NL80211_STA_INFO_TX_PACKETS))) { 1796 sinfo->tx_packets = 0; 1797 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) 1798 sinfo->tx_packets += sta->tx_packets[ac]; 1799 sinfo->filled |= BIT(NL80211_STA_INFO_TX_PACKETS); 1800 } 1801 1802 if (!(sinfo->filled & (BIT(NL80211_STA_INFO_RX_BYTES64) | 1803 BIT(NL80211_STA_INFO_RX_BYTES)))) { 1804 sinfo->rx_bytes = sta->rx_bytes; 1805 sinfo->filled |= BIT(NL80211_STA_INFO_RX_BYTES64); 1806 } 1807 1808 if (!(sinfo->filled & BIT(NL80211_STA_INFO_RX_PACKETS))) { 1809 sinfo->rx_packets = sta->rx_packets; 1810 sinfo->filled |= BIT(NL80211_STA_INFO_RX_PACKETS); 1811 } 1812 1813 if (!(sinfo->filled & BIT(NL80211_STA_INFO_TX_RETRIES))) { 1814 sinfo->tx_retries = sta->tx_retry_count; 1815 sinfo->filled |= BIT(NL80211_STA_INFO_TX_RETRIES); 1816 } 1817 1818 if (!(sinfo->filled & BIT(NL80211_STA_INFO_TX_FAILED))) { 1819 sinfo->tx_failed = sta->tx_retry_failed; 1820 sinfo->filled |= BIT(NL80211_STA_INFO_TX_FAILED); 1821 } 1822 1823 sinfo->rx_dropped_misc = sta->rx_dropped; 1824 sinfo->beacon_loss_count = sta->beacon_loss_count; 1825 1826 if (sdata->vif.type == NL80211_IFTYPE_STATION && 1827 !(sdata->vif.driver_flags & IEEE80211_VIF_BEACON_FILTER)) { 1828 sinfo->filled |= BIT(NL80211_STA_INFO_BEACON_RX) | 1829 BIT(NL80211_STA_INFO_BEACON_SIGNAL_AVG); 1830 sinfo->rx_beacon_signal_avg = ieee80211_ave_rssi(&sdata->vif); 1831 } 1832 1833 if ((sta->local->hw.flags & IEEE80211_HW_SIGNAL_DBM) || 1834 (sta->local->hw.flags & IEEE80211_HW_SIGNAL_UNSPEC)) { 1835 if (!(sinfo->filled & BIT(NL80211_STA_INFO_SIGNAL))) { 1836 sinfo->signal = (s8)sta->last_signal; 1837 sinfo->filled |= BIT(NL80211_STA_INFO_SIGNAL); 1838 } 1839 1840 if (!(sinfo->filled & BIT(NL80211_STA_INFO_SIGNAL_AVG))) { 1841 sinfo->signal_avg = (s8) -ewma_read(&sta->avg_signal); 1842 sinfo->filled |= BIT(NL80211_STA_INFO_SIGNAL_AVG); 1843 } 1844 } 1845 1846 if (sta->chains && 1847 !(sinfo->filled & (BIT(NL80211_STA_INFO_CHAIN_SIGNAL) | 1848 BIT(NL80211_STA_INFO_CHAIN_SIGNAL_AVG)))) { 1849 sinfo->filled |= BIT(NL80211_STA_INFO_CHAIN_SIGNAL) | 1850 BIT(NL80211_STA_INFO_CHAIN_SIGNAL_AVG); 1851 1852 sinfo->chains = sta->chains; 1853 for (i = 0; i < ARRAY_SIZE(sinfo->chain_signal); i++) { 1854 sinfo->chain_signal[i] = sta->chain_signal_last[i]; 1855 sinfo->chain_signal_avg[i] = 1856 (s8) -ewma_read(&sta->chain_signal_avg[i]); 1857 } 1858 } 1859 1860 if (!(sinfo->filled & BIT(NL80211_STA_INFO_TX_BITRATE))) { 1861 sta_set_rate_info_tx(sta, &sta->last_tx_rate, &sinfo->txrate); 1862 sinfo->filled |= BIT(NL80211_STA_INFO_TX_BITRATE); 1863 } 1864 1865 if (!(sinfo->filled & BIT(NL80211_STA_INFO_RX_BITRATE))) { 1866 sta_set_rate_info_rx(sta, &sinfo->rxrate); 1867 sinfo->filled |= BIT(NL80211_STA_INFO_RX_BITRATE); 1868 } 1869 1870 sinfo->filled |= BIT(NL80211_STA_INFO_TID_STATS); 1871 for (i = 0; i < IEEE80211_NUM_TIDS + 1; i++) { 1872 struct cfg80211_tid_stats *tidstats = &sinfo->pertid[i]; 1873 1874 if (!(tidstats->filled & BIT(NL80211_TID_STATS_RX_MSDU))) { 1875 tidstats->filled |= BIT(NL80211_TID_STATS_RX_MSDU); 1876 tidstats->rx_msdu = sta->rx_msdu[i]; 1877 } 1878 1879 if (!(tidstats->filled & BIT(NL80211_TID_STATS_TX_MSDU))) { 1880 tidstats->filled |= BIT(NL80211_TID_STATS_TX_MSDU); 1881 tidstats->tx_msdu = sta->tx_msdu[i]; 1882 } 1883 1884 if (!(tidstats->filled & 1885 BIT(NL80211_TID_STATS_TX_MSDU_RETRIES)) && 1886 local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) { 1887 tidstats->filled |= 1888 BIT(NL80211_TID_STATS_TX_MSDU_RETRIES); 1889 tidstats->tx_msdu_retries = sta->tx_msdu_retries[i]; 1890 } 1891 1892 if (!(tidstats->filled & 1893 BIT(NL80211_TID_STATS_TX_MSDU_FAILED)) && 1894 local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) { 1895 tidstats->filled |= 1896 BIT(NL80211_TID_STATS_TX_MSDU_FAILED); 1897 tidstats->tx_msdu_failed = sta->tx_msdu_failed[i]; 1898 } 1899 } 1900 1901 if (ieee80211_vif_is_mesh(&sdata->vif)) { 1902 #ifdef CONFIG_MAC80211_MESH 1903 sinfo->filled |= BIT(NL80211_STA_INFO_LLID) | 1904 BIT(NL80211_STA_INFO_PLID) | 1905 BIT(NL80211_STA_INFO_PLINK_STATE) | 1906 BIT(NL80211_STA_INFO_LOCAL_PM) | 1907 BIT(NL80211_STA_INFO_PEER_PM) | 1908 BIT(NL80211_STA_INFO_NONPEER_PM); 1909 1910 sinfo->llid = sta->llid; 1911 sinfo->plid = sta->plid; 1912 sinfo->plink_state = sta->plink_state; 1913 if (test_sta_flag(sta, WLAN_STA_TOFFSET_KNOWN)) { 1914 sinfo->filled |= BIT(NL80211_STA_INFO_T_OFFSET); 1915 sinfo->t_offset = sta->t_offset; 1916 } 1917 sinfo->local_pm = sta->local_pm; 1918 sinfo->peer_pm = sta->peer_pm; 1919 sinfo->nonpeer_pm = sta->nonpeer_pm; 1920 #endif 1921 } 1922 1923 sinfo->bss_param.flags = 0; 1924 if (sdata->vif.bss_conf.use_cts_prot) 1925 sinfo->bss_param.flags |= BSS_PARAM_FLAGS_CTS_PROT; 1926 if (sdata->vif.bss_conf.use_short_preamble) 1927 sinfo->bss_param.flags |= BSS_PARAM_FLAGS_SHORT_PREAMBLE; 1928 if (sdata->vif.bss_conf.use_short_slot) 1929 sinfo->bss_param.flags |= BSS_PARAM_FLAGS_SHORT_SLOT_TIME; 1930 sinfo->bss_param.dtim_period = sdata->vif.bss_conf.dtim_period; 1931 sinfo->bss_param.beacon_interval = sdata->vif.bss_conf.beacon_int; 1932 1933 sinfo->sta_flags.set = 0; 1934 sinfo->sta_flags.mask = BIT(NL80211_STA_FLAG_AUTHORIZED) | 1935 BIT(NL80211_STA_FLAG_SHORT_PREAMBLE) | 1936 BIT(NL80211_STA_FLAG_WME) | 1937 BIT(NL80211_STA_FLAG_MFP) | 1938 BIT(NL80211_STA_FLAG_AUTHENTICATED) | 1939 BIT(NL80211_STA_FLAG_ASSOCIATED) | 1940 BIT(NL80211_STA_FLAG_TDLS_PEER); 1941 if (test_sta_flag(sta, WLAN_STA_AUTHORIZED)) 1942 sinfo->sta_flags.set |= BIT(NL80211_STA_FLAG_AUTHORIZED); 1943 if (test_sta_flag(sta, WLAN_STA_SHORT_PREAMBLE)) 1944 sinfo->sta_flags.set |= BIT(NL80211_STA_FLAG_SHORT_PREAMBLE); 1945 if (sta->sta.wme) 1946 sinfo->sta_flags.set |= BIT(NL80211_STA_FLAG_WME); 1947 if (test_sta_flag(sta, WLAN_STA_MFP)) 1948 sinfo->sta_flags.set |= BIT(NL80211_STA_FLAG_MFP); 1949 if (test_sta_flag(sta, WLAN_STA_AUTH)) 1950 sinfo->sta_flags.set |= BIT(NL80211_STA_FLAG_AUTHENTICATED); 1951 if (test_sta_flag(sta, WLAN_STA_ASSOC)) 1952 sinfo->sta_flags.set |= BIT(NL80211_STA_FLAG_ASSOCIATED); 1953 if (test_sta_flag(sta, WLAN_STA_TDLS_PEER)) 1954 sinfo->sta_flags.set |= BIT(NL80211_STA_FLAG_TDLS_PEER); 1955 1956 /* check if the driver has a SW RC implementation */ 1957 if (ref && ref->ops->get_expected_throughput) 1958 thr = ref->ops->get_expected_throughput(sta->rate_ctrl_priv); 1959 else 1960 thr = drv_get_expected_throughput(local, &sta->sta); 1961 1962 if (thr != 0) { 1963 sinfo->filled |= BIT(NL80211_STA_INFO_EXPECTED_THROUGHPUT); 1964 sinfo->expected_throughput = thr; 1965 } 1966 } 1967