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1 | /* | |
2 | * Copyright 2002-2005, Instant802 Networks, Inc. | |
3 | * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz> | |
4 | * | |
5 | * This program is free software; you can redistribute it and/or modify | |
6 | * it under the terms of the GNU General Public License version 2 as | |
7 | * published by the Free Software Foundation. | |
8 | */ | |
9 | ||
10 | #include <linux/module.h> | |
11 | #include <linux/init.h> | |
12 | #include <linux/etherdevice.h> | |
13 | #include <linux/netdevice.h> | |
14 | #include <linux/types.h> | |
15 | #include <linux/slab.h> | |
16 | #include <linux/skbuff.h> | |
17 | #include <linux/if_arp.h> | |
18 | #include <linux/timer.h> | |
19 | #include <linux/rtnetlink.h> | |
20 | ||
21 | #include <net/mac80211.h> | |
22 | #include "ieee80211_i.h" | |
23 | #include "driver-ops.h" | |
24 | #include "rate.h" | |
25 | #include "sta_info.h" | |
26 | #include "debugfs_sta.h" | |
27 | #include "mesh.h" | |
28 | #include "wme.h" | |
29 | ||
30 | /** | |
31 | * DOC: STA information lifetime rules | |
32 | * | |
33 | * STA info structures (&struct sta_info) are managed in a hash table | |
34 | * for faster lookup and a list for iteration. They are managed using | |
35 | * RCU, i.e. access to the list and hash table is protected by RCU. | |
36 | * | |
37 | * Upon allocating a STA info structure with sta_info_alloc(), the caller | |
38 | * owns that structure. It must then insert it into the hash table using | |
39 | * either sta_info_insert() or sta_info_insert_rcu(); only in the latter | |
40 | * case (which acquires an rcu read section but must not be called from | |
41 | * within one) will the pointer still be valid after the call. Note that | |
42 | * the caller may not do much with the STA info before inserting it, in | |
43 | * particular, it may not start any mesh peer link management or add | |
44 | * encryption keys. | |
45 | * | |
46 | * When the insertion fails (sta_info_insert()) returns non-zero), the | |
47 | * structure will have been freed by sta_info_insert()! | |
48 | * | |
49 | * Station entries are added by mac80211 when you establish a link with a | |
50 | * peer. This means different things for the different type of interfaces | |
51 | * we support. For a regular station this mean we add the AP sta when we | |
52 | * receive an association response from the AP. For IBSS this occurs when | |
53 | * get to know about a peer on the same IBSS. For WDS we add the sta for | |
54 | * the peer immediately upon device open. When using AP mode we add stations | |
55 | * for each respective station upon request from userspace through nl80211. | |
56 | * | |
57 | * In order to remove a STA info structure, various sta_info_destroy_*() | |
58 | * calls are available. | |
59 | * | |
60 | * There is no concept of ownership on a STA entry, each structure is | |
61 | * owned by the global hash table/list until it is removed. All users of | |
62 | * the structure need to be RCU protected so that the structure won't be | |
63 | * freed before they are done using it. | |
64 | */ | |
65 | ||
66 | /* Caller must hold local->sta_mtx */ | |
67 | static int sta_info_hash_del(struct ieee80211_local *local, | |
68 | struct sta_info *sta) | |
69 | { | |
70 | struct sta_info *s; | |
71 | ||
72 | s = rcu_dereference_protected(local->sta_hash[STA_HASH(sta->sta.addr)], | |
73 | lockdep_is_held(&local->sta_mtx)); | |
74 | if (!s) | |
75 | return -ENOENT; | |
76 | if (s == sta) { | |
77 | rcu_assign_pointer(local->sta_hash[STA_HASH(sta->sta.addr)], | |
78 | s->hnext); | |
79 | return 0; | |
80 | } | |
81 | ||
82 | while (rcu_access_pointer(s->hnext) && | |
83 | rcu_access_pointer(s->hnext) != sta) | |
84 | s = rcu_dereference_protected(s->hnext, | |
85 | lockdep_is_held(&local->sta_mtx)); | |
86 | if (rcu_access_pointer(s->hnext)) { | |
87 | rcu_assign_pointer(s->hnext, sta->hnext); | |
88 | return 0; | |
89 | } | |
90 | ||
91 | return -ENOENT; | |
92 | } | |
93 | ||
94 | static void __cleanup_single_sta(struct sta_info *sta) | |
95 | { | |
96 | int ac, i; | |
97 | struct tid_ampdu_tx *tid_tx; | |
98 | struct ieee80211_sub_if_data *sdata = sta->sdata; | |
99 | struct ieee80211_local *local = sdata->local; | |
100 | struct ps_data *ps; | |
101 | ||
102 | if (test_sta_flag(sta, WLAN_STA_PS_STA) || | |
103 | test_sta_flag(sta, WLAN_STA_PS_DRIVER) || | |
104 | test_sta_flag(sta, WLAN_STA_PS_DELIVER)) { | |
105 | if (sta->sdata->vif.type == NL80211_IFTYPE_AP || | |
106 | sta->sdata->vif.type == NL80211_IFTYPE_AP_VLAN) | |
107 | ps = &sdata->bss->ps; | |
108 | else if (ieee80211_vif_is_mesh(&sdata->vif)) | |
109 | ps = &sdata->u.mesh.ps; | |
110 | else | |
111 | return; | |
112 | ||
113 | clear_sta_flag(sta, WLAN_STA_PS_STA); | |
114 | clear_sta_flag(sta, WLAN_STA_PS_DRIVER); | |
115 | clear_sta_flag(sta, WLAN_STA_PS_DELIVER); | |
116 | ||
117 | atomic_dec(&ps->num_sta_ps); | |
118 | sta_info_recalc_tim(sta); | |
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 | do_posix_clock_monotonic_gettime(&uptime); | |
354 | sta->last_connected = uptime.tv_sec; | |
355 | ewma_init(&sta->avg_signal, 1024, 8); | |
356 | for (i = 0; i < ARRAY_SIZE(sta->chain_signal_avg); i++) | |
357 | ewma_init(&sta->chain_signal_avg[i], 1024, 8); | |
358 | ||
359 | if (sta_prepare_rate_control(local, sta, gfp)) | |
360 | goto free; | |
361 | ||
362 | for (i = 0; i < IEEE80211_NUM_TIDS; i++) { | |
363 | /* | |
364 | * timer_to_tid must be initialized with identity mapping | |
365 | * to enable session_timer's data differentiation. See | |
366 | * sta_rx_agg_session_timer_expired for usage. | |
367 | */ | |
368 | sta->timer_to_tid[i] = i; | |
369 | } | |
370 | for (i = 0; i < IEEE80211_NUM_ACS; i++) { | |
371 | skb_queue_head_init(&sta->ps_tx_buf[i]); | |
372 | skb_queue_head_init(&sta->tx_filtered[i]); | |
373 | } | |
374 | ||
375 | for (i = 0; i < IEEE80211_NUM_TIDS; i++) | |
376 | sta->last_seq_ctrl[i] = cpu_to_le16(USHRT_MAX); | |
377 | ||
378 | sta->sta.smps_mode = IEEE80211_SMPS_OFF; | |
379 | if (sdata->vif.type == NL80211_IFTYPE_AP || | |
380 | sdata->vif.type == NL80211_IFTYPE_AP_VLAN) { | |
381 | struct ieee80211_supported_band *sband = | |
382 | local->hw.wiphy->bands[ieee80211_get_sdata_band(sdata)]; | |
383 | u8 smps = (sband->ht_cap.cap & IEEE80211_HT_CAP_SM_PS) >> | |
384 | IEEE80211_HT_CAP_SM_PS_SHIFT; | |
385 | /* | |
386 | * Assume that hostapd advertises our caps in the beacon and | |
387 | * this is the known_smps_mode for a station that just assciated | |
388 | */ | |
389 | switch (smps) { | |
390 | case WLAN_HT_SMPS_CONTROL_DISABLED: | |
391 | sta->known_smps_mode = IEEE80211_SMPS_OFF; | |
392 | break; | |
393 | case WLAN_HT_SMPS_CONTROL_STATIC: | |
394 | sta->known_smps_mode = IEEE80211_SMPS_STATIC; | |
395 | break; | |
396 | case WLAN_HT_SMPS_CONTROL_DYNAMIC: | |
397 | sta->known_smps_mode = IEEE80211_SMPS_DYNAMIC; | |
398 | break; | |
399 | default: | |
400 | WARN_ON(1); | |
401 | } | |
402 | } | |
403 | ||
404 | sta_dbg(sdata, "Allocated STA %pM\n", sta->sta.addr); | |
405 | return sta; | |
406 | ||
407 | free: | |
408 | if (sta->tx_lat) { | |
409 | for (i = 0; i < IEEE80211_NUM_TIDS; i++) | |
410 | kfree(sta->tx_lat[i].bins); | |
411 | kfree(sta->tx_lat); | |
412 | } | |
413 | kfree(sta); | |
414 | return NULL; | |
415 | } | |
416 | ||
417 | static int sta_info_insert_check(struct sta_info *sta) | |
418 | { | |
419 | struct ieee80211_sub_if_data *sdata = sta->sdata; | |
420 | ||
421 | /* | |
422 | * Can't be a WARN_ON because it can be triggered through a race: | |
423 | * something inserts a STA (on one CPU) without holding the RTNL | |
424 | * and another CPU turns off the net device. | |
425 | */ | |
426 | if (unlikely(!ieee80211_sdata_running(sdata))) | |
427 | return -ENETDOWN; | |
428 | ||
429 | if (WARN_ON(ether_addr_equal(sta->sta.addr, sdata->vif.addr) || | |
430 | is_multicast_ether_addr(sta->sta.addr))) | |
431 | return -EINVAL; | |
432 | ||
433 | return 0; | |
434 | } | |
435 | ||
436 | static int sta_info_insert_drv_state(struct ieee80211_local *local, | |
437 | struct ieee80211_sub_if_data *sdata, | |
438 | struct sta_info *sta) | |
439 | { | |
440 | enum ieee80211_sta_state state; | |
441 | int err = 0; | |
442 | ||
443 | for (state = IEEE80211_STA_NOTEXIST; state < sta->sta_state; state++) { | |
444 | err = drv_sta_state(local, sdata, sta, state, state + 1); | |
445 | if (err) | |
446 | break; | |
447 | } | |
448 | ||
449 | if (!err) { | |
450 | /* | |
451 | * Drivers using legacy sta_add/sta_remove callbacks only | |
452 | * get uploaded set to true after sta_add is called. | |
453 | */ | |
454 | if (!local->ops->sta_add) | |
455 | sta->uploaded = true; | |
456 | return 0; | |
457 | } | |
458 | ||
459 | if (sdata->vif.type == NL80211_IFTYPE_ADHOC) { | |
460 | sdata_info(sdata, | |
461 | "failed to move IBSS STA %pM to state %d (%d) - keeping it anyway\n", | |
462 | sta->sta.addr, state + 1, err); | |
463 | err = 0; | |
464 | } | |
465 | ||
466 | /* unwind on error */ | |
467 | for (; state > IEEE80211_STA_NOTEXIST; state--) | |
468 | WARN_ON(drv_sta_state(local, sdata, sta, state, state - 1)); | |
469 | ||
470 | return err; | |
471 | } | |
472 | ||
473 | /* | |
474 | * should be called with sta_mtx locked | |
475 | * this function replaces the mutex lock | |
476 | * with a RCU lock | |
477 | */ | |
478 | static int sta_info_insert_finish(struct sta_info *sta) __acquires(RCU) | |
479 | { | |
480 | struct ieee80211_local *local = sta->local; | |
481 | struct ieee80211_sub_if_data *sdata = sta->sdata; | |
482 | struct station_info sinfo; | |
483 | int err = 0; | |
484 | ||
485 | lockdep_assert_held(&local->sta_mtx); | |
486 | ||
487 | /* check if STA exists already */ | |
488 | if (sta_info_get_bss(sdata, sta->sta.addr)) { | |
489 | err = -EEXIST; | |
490 | goto out_err; | |
491 | } | |
492 | ||
493 | local->num_sta++; | |
494 | local->sta_generation++; | |
495 | smp_mb(); | |
496 | ||
497 | /* simplify things and don't accept BA sessions yet */ | |
498 | set_sta_flag(sta, WLAN_STA_BLOCK_BA); | |
499 | ||
500 | /* make the station visible */ | |
501 | sta_info_hash_add(local, sta); | |
502 | ||
503 | list_add_rcu(&sta->list, &local->sta_list); | |
504 | ||
505 | /* notify driver */ | |
506 | err = sta_info_insert_drv_state(local, sdata, sta); | |
507 | if (err) | |
508 | goto out_remove; | |
509 | ||
510 | set_sta_flag(sta, WLAN_STA_INSERTED); | |
511 | /* accept BA sessions now */ | |
512 | clear_sta_flag(sta, WLAN_STA_BLOCK_BA); | |
513 | ||
514 | ieee80211_recalc_min_chandef(sdata); | |
515 | ieee80211_sta_debugfs_add(sta); | |
516 | rate_control_add_sta_debugfs(sta); | |
517 | ||
518 | memset(&sinfo, 0, sizeof(sinfo)); | |
519 | sinfo.filled = 0; | |
520 | sinfo.generation = local->sta_generation; | |
521 | cfg80211_new_sta(sdata->dev, sta->sta.addr, &sinfo, GFP_KERNEL); | |
522 | ||
523 | sta_dbg(sdata, "Inserted STA %pM\n", sta->sta.addr); | |
524 | ||
525 | /* move reference to rcu-protected */ | |
526 | rcu_read_lock(); | |
527 | mutex_unlock(&local->sta_mtx); | |
528 | ||
529 | if (ieee80211_vif_is_mesh(&sdata->vif)) | |
530 | mesh_accept_plinks_update(sdata); | |
531 | ||
532 | return 0; | |
533 | out_remove: | |
534 | sta_info_hash_del(local, sta); | |
535 | list_del_rcu(&sta->list); | |
536 | local->num_sta--; | |
537 | synchronize_net(); | |
538 | __cleanup_single_sta(sta); | |
539 | out_err: | |
540 | mutex_unlock(&local->sta_mtx); | |
541 | rcu_read_lock(); | |
542 | return err; | |
543 | } | |
544 | ||
545 | int sta_info_insert_rcu(struct sta_info *sta) __acquires(RCU) | |
546 | { | |
547 | struct ieee80211_local *local = sta->local; | |
548 | int err; | |
549 | ||
550 | might_sleep(); | |
551 | ||
552 | err = sta_info_insert_check(sta); | |
553 | if (err) { | |
554 | rcu_read_lock(); | |
555 | goto out_free; | |
556 | } | |
557 | ||
558 | mutex_lock(&local->sta_mtx); | |
559 | ||
560 | err = sta_info_insert_finish(sta); | |
561 | if (err) | |
562 | goto out_free; | |
563 | ||
564 | return 0; | |
565 | out_free: | |
566 | sta_info_free(local, sta); | |
567 | return err; | |
568 | } | |
569 | ||
570 | int sta_info_insert(struct sta_info *sta) | |
571 | { | |
572 | int err = sta_info_insert_rcu(sta); | |
573 | ||
574 | rcu_read_unlock(); | |
575 | ||
576 | return err; | |
577 | } | |
578 | ||
579 | static inline void __bss_tim_set(u8 *tim, u16 id) | |
580 | { | |
581 | /* | |
582 | * This format has been mandated by the IEEE specifications, | |
583 | * so this line may not be changed to use the __set_bit() format. | |
584 | */ | |
585 | tim[id / 8] |= (1 << (id % 8)); | |
586 | } | |
587 | ||
588 | static inline void __bss_tim_clear(u8 *tim, u16 id) | |
589 | { | |
590 | /* | |
591 | * This format has been mandated by the IEEE specifications, | |
592 | * so this line may not be changed to use the __clear_bit() format. | |
593 | */ | |
594 | tim[id / 8] &= ~(1 << (id % 8)); | |
595 | } | |
596 | ||
597 | static inline bool __bss_tim_get(u8 *tim, u16 id) | |
598 | { | |
599 | /* | |
600 | * This format has been mandated by the IEEE specifications, | |
601 | * so this line may not be changed to use the test_bit() format. | |
602 | */ | |
603 | return tim[id / 8] & (1 << (id % 8)); | |
604 | } | |
605 | ||
606 | static unsigned long ieee80211_tids_for_ac(int ac) | |
607 | { | |
608 | /* If we ever support TIDs > 7, this obviously needs to be adjusted */ | |
609 | switch (ac) { | |
610 | case IEEE80211_AC_VO: | |
611 | return BIT(6) | BIT(7); | |
612 | case IEEE80211_AC_VI: | |
613 | return BIT(4) | BIT(5); | |
614 | case IEEE80211_AC_BE: | |
615 | return BIT(0) | BIT(3); | |
616 | case IEEE80211_AC_BK: | |
617 | return BIT(1) | BIT(2); | |
618 | default: | |
619 | WARN_ON(1); | |
620 | return 0; | |
621 | } | |
622 | } | |
623 | ||
624 | void sta_info_recalc_tim(struct sta_info *sta) | |
625 | { | |
626 | struct ieee80211_local *local = sta->local; | |
627 | struct ps_data *ps; | |
628 | bool indicate_tim = false; | |
629 | u8 ignore_for_tim = sta->sta.uapsd_queues; | |
630 | int ac; | |
631 | u16 id; | |
632 | ||
633 | if (sta->sdata->vif.type == NL80211_IFTYPE_AP || | |
634 | sta->sdata->vif.type == NL80211_IFTYPE_AP_VLAN) { | |
635 | if (WARN_ON_ONCE(!sta->sdata->bss)) | |
636 | return; | |
637 | ||
638 | ps = &sta->sdata->bss->ps; | |
639 | id = sta->sta.aid; | |
640 | #ifdef CONFIG_MAC80211_MESH | |
641 | } else if (ieee80211_vif_is_mesh(&sta->sdata->vif)) { | |
642 | ps = &sta->sdata->u.mesh.ps; | |
643 | /* TIM map only for 1 <= PLID <= IEEE80211_MAX_AID */ | |
644 | id = sta->plid % (IEEE80211_MAX_AID + 1); | |
645 | #endif | |
646 | } else { | |
647 | return; | |
648 | } | |
649 | ||
650 | /* No need to do anything if the driver does all */ | |
651 | if (local->hw.flags & IEEE80211_HW_AP_LINK_PS) | |
652 | return; | |
653 | ||
654 | if (sta->dead) | |
655 | goto done; | |
656 | ||
657 | /* | |
658 | * If all ACs are delivery-enabled then we should build | |
659 | * the TIM bit for all ACs anyway; if only some are then | |
660 | * we ignore those and build the TIM bit using only the | |
661 | * non-enabled ones. | |
662 | */ | |
663 | if (ignore_for_tim == BIT(IEEE80211_NUM_ACS) - 1) | |
664 | ignore_for_tim = 0; | |
665 | ||
666 | for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) { | |
667 | unsigned long tids; | |
668 | ||
669 | if (ignore_for_tim & BIT(ac)) | |
670 | continue; | |
671 | ||
672 | indicate_tim |= !skb_queue_empty(&sta->tx_filtered[ac]) || | |
673 | !skb_queue_empty(&sta->ps_tx_buf[ac]); | |
674 | if (indicate_tim) | |
675 | break; | |
676 | ||
677 | tids = ieee80211_tids_for_ac(ac); | |
678 | ||
679 | indicate_tim |= | |
680 | sta->driver_buffered_tids & tids; | |
681 | } | |
682 | ||
683 | done: | |
684 | spin_lock_bh(&local->tim_lock); | |
685 | ||
686 | if (indicate_tim == __bss_tim_get(ps->tim, id)) | |
687 | goto out_unlock; | |
688 | ||
689 | if (indicate_tim) | |
690 | __bss_tim_set(ps->tim, id); | |
691 | else | |
692 | __bss_tim_clear(ps->tim, id); | |
693 | ||
694 | if (local->ops->set_tim) { | |
695 | local->tim_in_locked_section = true; | |
696 | drv_set_tim(local, &sta->sta, indicate_tim); | |
697 | local->tim_in_locked_section = false; | |
698 | } | |
699 | ||
700 | out_unlock: | |
701 | spin_unlock_bh(&local->tim_lock); | |
702 | } | |
703 | ||
704 | static bool sta_info_buffer_expired(struct sta_info *sta, struct sk_buff *skb) | |
705 | { | |
706 | struct ieee80211_tx_info *info; | |
707 | int timeout; | |
708 | ||
709 | if (!skb) | |
710 | return false; | |
711 | ||
712 | info = IEEE80211_SKB_CB(skb); | |
713 | ||
714 | /* Timeout: (2 * listen_interval * beacon_int * 1024 / 1000000) sec */ | |
715 | timeout = (sta->listen_interval * | |
716 | sta->sdata->vif.bss_conf.beacon_int * | |
717 | 32 / 15625) * HZ; | |
718 | if (timeout < STA_TX_BUFFER_EXPIRE) | |
719 | timeout = STA_TX_BUFFER_EXPIRE; | |
720 | return time_after(jiffies, info->control.jiffies + timeout); | |
721 | } | |
722 | ||
723 | ||
724 | static bool sta_info_cleanup_expire_buffered_ac(struct ieee80211_local *local, | |
725 | struct sta_info *sta, int ac) | |
726 | { | |
727 | unsigned long flags; | |
728 | struct sk_buff *skb; | |
729 | ||
730 | /* | |
731 | * First check for frames that should expire on the filtered | |
732 | * queue. Frames here were rejected by the driver and are on | |
733 | * a separate queue to avoid reordering with normal PS-buffered | |
734 | * frames. They also aren't accounted for right now in the | |
735 | * total_ps_buffered counter. | |
736 | */ | |
737 | for (;;) { | |
738 | spin_lock_irqsave(&sta->tx_filtered[ac].lock, flags); | |
739 | skb = skb_peek(&sta->tx_filtered[ac]); | |
740 | if (sta_info_buffer_expired(sta, skb)) | |
741 | skb = __skb_dequeue(&sta->tx_filtered[ac]); | |
742 | else | |
743 | skb = NULL; | |
744 | spin_unlock_irqrestore(&sta->tx_filtered[ac].lock, flags); | |
745 | ||
746 | /* | |
747 | * Frames are queued in order, so if this one | |
748 | * hasn't expired yet we can stop testing. If | |
749 | * we actually reached the end of the queue we | |
750 | * also need to stop, of course. | |
751 | */ | |
752 | if (!skb) | |
753 | break; | |
754 | ieee80211_free_txskb(&local->hw, skb); | |
755 | } | |
756 | ||
757 | /* | |
758 | * Now also check the normal PS-buffered queue, this will | |
759 | * only find something if the filtered queue was emptied | |
760 | * since the filtered frames are all before the normal PS | |
761 | * buffered frames. | |
762 | */ | |
763 | for (;;) { | |
764 | spin_lock_irqsave(&sta->ps_tx_buf[ac].lock, flags); | |
765 | skb = skb_peek(&sta->ps_tx_buf[ac]); | |
766 | if (sta_info_buffer_expired(sta, skb)) | |
767 | skb = __skb_dequeue(&sta->ps_tx_buf[ac]); | |
768 | else | |
769 | skb = NULL; | |
770 | spin_unlock_irqrestore(&sta->ps_tx_buf[ac].lock, flags); | |
771 | ||
772 | /* | |
773 | * frames are queued in order, so if this one | |
774 | * hasn't expired yet (or we reached the end of | |
775 | * the queue) we can stop testing | |
776 | */ | |
777 | if (!skb) | |
778 | break; | |
779 | ||
780 | local->total_ps_buffered--; | |
781 | ps_dbg(sta->sdata, "Buffered frame expired (STA %pM)\n", | |
782 | sta->sta.addr); | |
783 | ieee80211_free_txskb(&local->hw, skb); | |
784 | } | |
785 | ||
786 | /* | |
787 | * Finally, recalculate the TIM bit for this station -- it might | |
788 | * now be clear because the station was too slow to retrieve its | |
789 | * frames. | |
790 | */ | |
791 | sta_info_recalc_tim(sta); | |
792 | ||
793 | /* | |
794 | * Return whether there are any frames still buffered, this is | |
795 | * used to check whether the cleanup timer still needs to run, | |
796 | * if there are no frames we don't need to rearm the timer. | |
797 | */ | |
798 | return !(skb_queue_empty(&sta->ps_tx_buf[ac]) && | |
799 | skb_queue_empty(&sta->tx_filtered[ac])); | |
800 | } | |
801 | ||
802 | static bool sta_info_cleanup_expire_buffered(struct ieee80211_local *local, | |
803 | struct sta_info *sta) | |
804 | { | |
805 | bool have_buffered = false; | |
806 | int ac; | |
807 | ||
808 | /* This is only necessary for stations on BSS/MBSS interfaces */ | |
809 | if (!sta->sdata->bss && | |
810 | !ieee80211_vif_is_mesh(&sta->sdata->vif)) | |
811 | return false; | |
812 | ||
813 | for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) | |
814 | have_buffered |= | |
815 | sta_info_cleanup_expire_buffered_ac(local, sta, ac); | |
816 | ||
817 | return have_buffered; | |
818 | } | |
819 | ||
820 | static int __must_check __sta_info_destroy_part1(struct sta_info *sta) | |
821 | { | |
822 | struct ieee80211_local *local; | |
823 | struct ieee80211_sub_if_data *sdata; | |
824 | int ret; | |
825 | ||
826 | might_sleep(); | |
827 | ||
828 | if (!sta) | |
829 | return -ENOENT; | |
830 | ||
831 | local = sta->local; | |
832 | sdata = sta->sdata; | |
833 | ||
834 | lockdep_assert_held(&local->sta_mtx); | |
835 | ||
836 | /* | |
837 | * Before removing the station from the driver and | |
838 | * rate control, it might still start new aggregation | |
839 | * sessions -- block that to make sure the tear-down | |
840 | * will be sufficient. | |
841 | */ | |
842 | set_sta_flag(sta, WLAN_STA_BLOCK_BA); | |
843 | ieee80211_sta_tear_down_BA_sessions(sta, AGG_STOP_DESTROY_STA); | |
844 | ||
845 | ret = sta_info_hash_del(local, sta); | |
846 | if (WARN_ON(ret)) | |
847 | return ret; | |
848 | ||
849 | list_del_rcu(&sta->list); | |
850 | ||
851 | drv_sta_pre_rcu_remove(local, sta->sdata, sta); | |
852 | ||
853 | if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN && | |
854 | rcu_access_pointer(sdata->u.vlan.sta) == sta) | |
855 | RCU_INIT_POINTER(sdata->u.vlan.sta, NULL); | |
856 | ||
857 | return 0; | |
858 | } | |
859 | ||
860 | static void __sta_info_destroy_part2(struct sta_info *sta) | |
861 | { | |
862 | struct ieee80211_local *local = sta->local; | |
863 | struct ieee80211_sub_if_data *sdata = sta->sdata; | |
864 | int ret; | |
865 | ||
866 | /* | |
867 | * NOTE: This assumes at least synchronize_net() was done | |
868 | * after _part1 and before _part2! | |
869 | */ | |
870 | ||
871 | might_sleep(); | |
872 | lockdep_assert_held(&local->sta_mtx); | |
873 | ||
874 | /* now keys can no longer be reached */ | |
875 | ieee80211_free_sta_keys(local, sta); | |
876 | ||
877 | sta->dead = true; | |
878 | ||
879 | local->num_sta--; | |
880 | local->sta_generation++; | |
881 | ||
882 | while (sta->sta_state > IEEE80211_STA_NONE) { | |
883 | ret = sta_info_move_state(sta, sta->sta_state - 1); | |
884 | if (ret) { | |
885 | WARN_ON_ONCE(1); | |
886 | break; | |
887 | } | |
888 | } | |
889 | ||
890 | if (sta->uploaded) { | |
891 | ret = drv_sta_state(local, sdata, sta, IEEE80211_STA_NONE, | |
892 | IEEE80211_STA_NOTEXIST); | |
893 | WARN_ON_ONCE(ret != 0); | |
894 | } | |
895 | ||
896 | sta_dbg(sdata, "Removed STA %pM\n", sta->sta.addr); | |
897 | ||
898 | cfg80211_del_sta(sdata->dev, sta->sta.addr, GFP_KERNEL); | |
899 | ||
900 | rate_control_remove_sta_debugfs(sta); | |
901 | ieee80211_sta_debugfs_remove(sta); | |
902 | ieee80211_recalc_min_chandef(sdata); | |
903 | ||
904 | cleanup_single_sta(sta); | |
905 | } | |
906 | ||
907 | int __must_check __sta_info_destroy(struct sta_info *sta) | |
908 | { | |
909 | int err = __sta_info_destroy_part1(sta); | |
910 | ||
911 | if (err) | |
912 | return err; | |
913 | ||
914 | synchronize_net(); | |
915 | ||
916 | __sta_info_destroy_part2(sta); | |
917 | ||
918 | return 0; | |
919 | } | |
920 | ||
921 | int sta_info_destroy_addr(struct ieee80211_sub_if_data *sdata, const u8 *addr) | |
922 | { | |
923 | struct sta_info *sta; | |
924 | int ret; | |
925 | ||
926 | mutex_lock(&sdata->local->sta_mtx); | |
927 | sta = sta_info_get(sdata, addr); | |
928 | ret = __sta_info_destroy(sta); | |
929 | mutex_unlock(&sdata->local->sta_mtx); | |
930 | ||
931 | return ret; | |
932 | } | |
933 | ||
934 | int sta_info_destroy_addr_bss(struct ieee80211_sub_if_data *sdata, | |
935 | const u8 *addr) | |
936 | { | |
937 | struct sta_info *sta; | |
938 | int ret; | |
939 | ||
940 | mutex_lock(&sdata->local->sta_mtx); | |
941 | sta = sta_info_get_bss(sdata, addr); | |
942 | ret = __sta_info_destroy(sta); | |
943 | mutex_unlock(&sdata->local->sta_mtx); | |
944 | ||
945 | return ret; | |
946 | } | |
947 | ||
948 | static void sta_info_cleanup(unsigned long data) | |
949 | { | |
950 | struct ieee80211_local *local = (struct ieee80211_local *) data; | |
951 | struct sta_info *sta; | |
952 | bool timer_needed = false; | |
953 | ||
954 | rcu_read_lock(); | |
955 | list_for_each_entry_rcu(sta, &local->sta_list, list) | |
956 | if (sta_info_cleanup_expire_buffered(local, sta)) | |
957 | timer_needed = true; | |
958 | rcu_read_unlock(); | |
959 | ||
960 | if (local->quiescing) | |
961 | return; | |
962 | ||
963 | if (!timer_needed) | |
964 | return; | |
965 | ||
966 | mod_timer(&local->sta_cleanup, | |
967 | round_jiffies(jiffies + STA_INFO_CLEANUP_INTERVAL)); | |
968 | } | |
969 | ||
970 | void sta_info_init(struct ieee80211_local *local) | |
971 | { | |
972 | spin_lock_init(&local->tim_lock); | |
973 | mutex_init(&local->sta_mtx); | |
974 | INIT_LIST_HEAD(&local->sta_list); | |
975 | ||
976 | setup_timer(&local->sta_cleanup, sta_info_cleanup, | |
977 | (unsigned long)local); | |
978 | } | |
979 | ||
980 | void sta_info_stop(struct ieee80211_local *local) | |
981 | { | |
982 | del_timer_sync(&local->sta_cleanup); | |
983 | } | |
984 | ||
985 | ||
986 | int __sta_info_flush(struct ieee80211_sub_if_data *sdata, bool vlans) | |
987 | { | |
988 | struct ieee80211_local *local = sdata->local; | |
989 | struct sta_info *sta, *tmp; | |
990 | LIST_HEAD(free_list); | |
991 | int ret = 0; | |
992 | ||
993 | might_sleep(); | |
994 | ||
995 | WARN_ON(vlans && sdata->vif.type != NL80211_IFTYPE_AP); | |
996 | WARN_ON(vlans && !sdata->bss); | |
997 | ||
998 | mutex_lock(&local->sta_mtx); | |
999 | list_for_each_entry_safe(sta, tmp, &local->sta_list, list) { | |
1000 | if (sdata == sta->sdata || | |
1001 | (vlans && sdata->bss == sta->sdata->bss)) { | |
1002 | if (!WARN_ON(__sta_info_destroy_part1(sta))) | |
1003 | list_add(&sta->free_list, &free_list); | |
1004 | ret++; | |
1005 | } | |
1006 | } | |
1007 | ||
1008 | if (!list_empty(&free_list)) { | |
1009 | synchronize_net(); | |
1010 | list_for_each_entry_safe(sta, tmp, &free_list, free_list) | |
1011 | __sta_info_destroy_part2(sta); | |
1012 | } | |
1013 | mutex_unlock(&local->sta_mtx); | |
1014 | ||
1015 | return ret; | |
1016 | } | |
1017 | ||
1018 | void ieee80211_sta_expire(struct ieee80211_sub_if_data *sdata, | |
1019 | unsigned long exp_time) | |
1020 | { | |
1021 | struct ieee80211_local *local = sdata->local; | |
1022 | struct sta_info *sta, *tmp; | |
1023 | ||
1024 | mutex_lock(&local->sta_mtx); | |
1025 | ||
1026 | list_for_each_entry_safe(sta, tmp, &local->sta_list, list) { | |
1027 | if (sdata != sta->sdata) | |
1028 | continue; | |
1029 | ||
1030 | if (time_after(jiffies, sta->last_rx + exp_time)) { | |
1031 | sta_dbg(sta->sdata, "expiring inactive STA %pM\n", | |
1032 | sta->sta.addr); | |
1033 | ||
1034 | if (ieee80211_vif_is_mesh(&sdata->vif) && | |
1035 | test_sta_flag(sta, WLAN_STA_PS_STA)) | |
1036 | atomic_dec(&sdata->u.mesh.ps.num_sta_ps); | |
1037 | ||
1038 | WARN_ON(__sta_info_destroy(sta)); | |
1039 | } | |
1040 | } | |
1041 | ||
1042 | mutex_unlock(&local->sta_mtx); | |
1043 | } | |
1044 | ||
1045 | struct ieee80211_sta *ieee80211_find_sta_by_ifaddr(struct ieee80211_hw *hw, | |
1046 | const u8 *addr, | |
1047 | const u8 *localaddr) | |
1048 | { | |
1049 | struct sta_info *sta, *nxt; | |
1050 | ||
1051 | /* | |
1052 | * Just return a random station if localaddr is NULL | |
1053 | * ... first in list. | |
1054 | */ | |
1055 | for_each_sta_info(hw_to_local(hw), addr, sta, nxt) { | |
1056 | if (localaddr && | |
1057 | !ether_addr_equal(sta->sdata->vif.addr, localaddr)) | |
1058 | continue; | |
1059 | if (!sta->uploaded) | |
1060 | return NULL; | |
1061 | return &sta->sta; | |
1062 | } | |
1063 | ||
1064 | return NULL; | |
1065 | } | |
1066 | EXPORT_SYMBOL_GPL(ieee80211_find_sta_by_ifaddr); | |
1067 | ||
1068 | struct ieee80211_sta *ieee80211_find_sta(struct ieee80211_vif *vif, | |
1069 | const u8 *addr) | |
1070 | { | |
1071 | struct sta_info *sta; | |
1072 | ||
1073 | if (!vif) | |
1074 | return NULL; | |
1075 | ||
1076 | sta = sta_info_get_bss(vif_to_sdata(vif), addr); | |
1077 | if (!sta) | |
1078 | return NULL; | |
1079 | ||
1080 | if (!sta->uploaded) | |
1081 | return NULL; | |
1082 | ||
1083 | return &sta->sta; | |
1084 | } | |
1085 | EXPORT_SYMBOL(ieee80211_find_sta); | |
1086 | ||
1087 | /* powersave support code */ | |
1088 | void ieee80211_sta_ps_deliver_wakeup(struct sta_info *sta) | |
1089 | { | |
1090 | struct ieee80211_sub_if_data *sdata = sta->sdata; | |
1091 | struct ieee80211_local *local = sdata->local; | |
1092 | struct sk_buff_head pending; | |
1093 | int filtered = 0, buffered = 0, ac; | |
1094 | unsigned long flags; | |
1095 | struct ps_data *ps; | |
1096 | ||
1097 | if (sdata->vif.type == NL80211_IFTYPE_AP || | |
1098 | sdata->vif.type == NL80211_IFTYPE_AP_VLAN) | |
1099 | ps = &sdata->bss->ps; | |
1100 | else if (ieee80211_vif_is_mesh(&sdata->vif)) | |
1101 | ps = &sdata->u.mesh.ps; | |
1102 | else | |
1103 | return; | |
1104 | ||
1105 | clear_sta_flag(sta, WLAN_STA_SP); | |
1106 | ||
1107 | BUILD_BUG_ON(BITS_TO_LONGS(IEEE80211_NUM_TIDS) > 1); | |
1108 | sta->driver_buffered_tids = 0; | |
1109 | ||
1110 | if (!(local->hw.flags & IEEE80211_HW_AP_LINK_PS)) | |
1111 | drv_sta_notify(local, sdata, STA_NOTIFY_AWAKE, &sta->sta); | |
1112 | ||
1113 | skb_queue_head_init(&pending); | |
1114 | ||
1115 | /* sync with ieee80211_tx_h_unicast_ps_buf */ | |
1116 | spin_lock(&sta->ps_lock); | |
1117 | /* Send all buffered frames to the station */ | |
1118 | for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) { | |
1119 | int count = skb_queue_len(&pending), tmp; | |
1120 | ||
1121 | spin_lock_irqsave(&sta->tx_filtered[ac].lock, flags); | |
1122 | skb_queue_splice_tail_init(&sta->tx_filtered[ac], &pending); | |
1123 | spin_unlock_irqrestore(&sta->tx_filtered[ac].lock, flags); | |
1124 | tmp = skb_queue_len(&pending); | |
1125 | filtered += tmp - count; | |
1126 | count = tmp; | |
1127 | ||
1128 | spin_lock_irqsave(&sta->ps_tx_buf[ac].lock, flags); | |
1129 | skb_queue_splice_tail_init(&sta->ps_tx_buf[ac], &pending); | |
1130 | spin_unlock_irqrestore(&sta->ps_tx_buf[ac].lock, flags); | |
1131 | tmp = skb_queue_len(&pending); | |
1132 | buffered += tmp - count; | |
1133 | } | |
1134 | ||
1135 | ieee80211_add_pending_skbs(local, &pending); | |
1136 | ||
1137 | /* now we're no longer in the deliver code */ | |
1138 | clear_sta_flag(sta, WLAN_STA_PS_DELIVER); | |
1139 | ||
1140 | /* The station might have polled and then woken up before we responded, | |
1141 | * so clear these flags now to avoid them sticking around. | |
1142 | */ | |
1143 | clear_sta_flag(sta, WLAN_STA_PSPOLL); | |
1144 | clear_sta_flag(sta, WLAN_STA_UAPSD); | |
1145 | spin_unlock(&sta->ps_lock); | |
1146 | ||
1147 | atomic_dec(&ps->num_sta_ps); | |
1148 | ||
1149 | /* This station just woke up and isn't aware of our SMPS state */ | |
1150 | if (!ieee80211_vif_is_mesh(&sdata->vif) && | |
1151 | !ieee80211_smps_is_restrictive(sta->known_smps_mode, | |
1152 | sdata->smps_mode) && | |
1153 | sta->known_smps_mode != sdata->bss->req_smps && | |
1154 | sta_info_tx_streams(sta) != 1) { | |
1155 | ht_dbg(sdata, | |
1156 | "%pM just woke up and MIMO capable - update SMPS\n", | |
1157 | sta->sta.addr); | |
1158 | ieee80211_send_smps_action(sdata, sdata->bss->req_smps, | |
1159 | sta->sta.addr, | |
1160 | sdata->vif.bss_conf.bssid); | |
1161 | } | |
1162 | ||
1163 | local->total_ps_buffered -= buffered; | |
1164 | ||
1165 | sta_info_recalc_tim(sta); | |
1166 | ||
1167 | ps_dbg(sdata, | |
1168 | "STA %pM aid %d sending %d filtered/%d PS frames since STA not sleeping anymore\n", | |
1169 | sta->sta.addr, sta->sta.aid, filtered, buffered); | |
1170 | } | |
1171 | ||
1172 | static void ieee80211_send_null_response(struct ieee80211_sub_if_data *sdata, | |
1173 | struct sta_info *sta, int tid, | |
1174 | enum ieee80211_frame_release_type reason, | |
1175 | bool call_driver) | |
1176 | { | |
1177 | struct ieee80211_local *local = sdata->local; | |
1178 | struct ieee80211_qos_hdr *nullfunc; | |
1179 | struct sk_buff *skb; | |
1180 | int size = sizeof(*nullfunc); | |
1181 | __le16 fc; | |
1182 | bool qos = test_sta_flag(sta, WLAN_STA_WME); | |
1183 | struct ieee80211_tx_info *info; | |
1184 | struct ieee80211_chanctx_conf *chanctx_conf; | |
1185 | ||
1186 | if (qos) { | |
1187 | fc = cpu_to_le16(IEEE80211_FTYPE_DATA | | |
1188 | IEEE80211_STYPE_QOS_NULLFUNC | | |
1189 | IEEE80211_FCTL_FROMDS); | |
1190 | } else { | |
1191 | size -= 2; | |
1192 | fc = cpu_to_le16(IEEE80211_FTYPE_DATA | | |
1193 | IEEE80211_STYPE_NULLFUNC | | |
1194 | IEEE80211_FCTL_FROMDS); | |
1195 | } | |
1196 | ||
1197 | skb = dev_alloc_skb(local->hw.extra_tx_headroom + size); | |
1198 | if (!skb) | |
1199 | return; | |
1200 | ||
1201 | skb_reserve(skb, local->hw.extra_tx_headroom); | |
1202 | ||
1203 | nullfunc = (void *) skb_put(skb, size); | |
1204 | nullfunc->frame_control = fc; | |
1205 | nullfunc->duration_id = 0; | |
1206 | memcpy(nullfunc->addr1, sta->sta.addr, ETH_ALEN); | |
1207 | memcpy(nullfunc->addr2, sdata->vif.addr, ETH_ALEN); | |
1208 | memcpy(nullfunc->addr3, sdata->vif.addr, ETH_ALEN); | |
1209 | nullfunc->seq_ctrl = 0; | |
1210 | ||
1211 | skb->priority = tid; | |
1212 | skb_set_queue_mapping(skb, ieee802_1d_to_ac[tid]); | |
1213 | if (qos) { | |
1214 | nullfunc->qos_ctrl = cpu_to_le16(tid); | |
1215 | ||
1216 | if (reason == IEEE80211_FRAME_RELEASE_UAPSD) | |
1217 | nullfunc->qos_ctrl |= | |
1218 | cpu_to_le16(IEEE80211_QOS_CTL_EOSP); | |
1219 | } | |
1220 | ||
1221 | info = IEEE80211_SKB_CB(skb); | |
1222 | ||
1223 | /* | |
1224 | * Tell TX path to send this frame even though the | |
1225 | * STA may still remain is PS mode after this frame | |
1226 | * exchange. Also set EOSP to indicate this packet | |
1227 | * ends the poll/service period. | |
1228 | */ | |
1229 | info->flags |= IEEE80211_TX_CTL_NO_PS_BUFFER | | |
1230 | IEEE80211_TX_CTL_PS_RESPONSE | | |
1231 | IEEE80211_TX_STATUS_EOSP | | |
1232 | IEEE80211_TX_CTL_REQ_TX_STATUS; | |
1233 | ||
1234 | if (call_driver) | |
1235 | drv_allow_buffered_frames(local, sta, BIT(tid), 1, | |
1236 | reason, false); | |
1237 | ||
1238 | skb->dev = sdata->dev; | |
1239 | ||
1240 | rcu_read_lock(); | |
1241 | chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf); | |
1242 | if (WARN_ON(!chanctx_conf)) { | |
1243 | rcu_read_unlock(); | |
1244 | kfree_skb(skb); | |
1245 | return; | |
1246 | } | |
1247 | ||
1248 | ieee80211_xmit(sdata, skb, chanctx_conf->def.chan->band); | |
1249 | rcu_read_unlock(); | |
1250 | } | |
1251 | ||
1252 | static int find_highest_prio_tid(unsigned long tids) | |
1253 | { | |
1254 | /* lower 3 TIDs aren't ordered perfectly */ | |
1255 | if (tids & 0xF8) | |
1256 | return fls(tids) - 1; | |
1257 | /* TID 0 is BE just like TID 3 */ | |
1258 | if (tids & BIT(0)) | |
1259 | return 0; | |
1260 | return fls(tids) - 1; | |
1261 | } | |
1262 | ||
1263 | static void | |
1264 | ieee80211_sta_ps_deliver_response(struct sta_info *sta, | |
1265 | int n_frames, u8 ignored_acs, | |
1266 | enum ieee80211_frame_release_type reason) | |
1267 | { | |
1268 | struct ieee80211_sub_if_data *sdata = sta->sdata; | |
1269 | struct ieee80211_local *local = sdata->local; | |
1270 | bool more_data = false; | |
1271 | int ac; | |
1272 | unsigned long driver_release_tids = 0; | |
1273 | struct sk_buff_head frames; | |
1274 | ||
1275 | /* Service or PS-Poll period starts */ | |
1276 | set_sta_flag(sta, WLAN_STA_SP); | |
1277 | ||
1278 | __skb_queue_head_init(&frames); | |
1279 | ||
1280 | /* Get response frame(s) and more data bit for the last one. */ | |
1281 | for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) { | |
1282 | unsigned long tids; | |
1283 | ||
1284 | if (ignored_acs & BIT(ac)) | |
1285 | continue; | |
1286 | ||
1287 | tids = ieee80211_tids_for_ac(ac); | |
1288 | ||
1289 | /* if we already have frames from software, then we can't also | |
1290 | * release from hardware queues | |
1291 | */ | |
1292 | if (skb_queue_empty(&frames)) | |
1293 | driver_release_tids |= sta->driver_buffered_tids & tids; | |
1294 | ||
1295 | if (driver_release_tids) { | |
1296 | /* If the driver has data on more than one TID then | |
1297 | * certainly there's more data if we release just a | |
1298 | * single frame now (from a single TID). This will | |
1299 | * only happen for PS-Poll. | |
1300 | */ | |
1301 | if (reason == IEEE80211_FRAME_RELEASE_PSPOLL && | |
1302 | hweight16(driver_release_tids) > 1) { | |
1303 | more_data = true; | |
1304 | driver_release_tids = | |
1305 | BIT(find_highest_prio_tid( | |
1306 | driver_release_tids)); | |
1307 | break; | |
1308 | } | |
1309 | } else { | |
1310 | struct sk_buff *skb; | |
1311 | ||
1312 | while (n_frames > 0) { | |
1313 | skb = skb_dequeue(&sta->tx_filtered[ac]); | |
1314 | if (!skb) { | |
1315 | skb = skb_dequeue( | |
1316 | &sta->ps_tx_buf[ac]); | |
1317 | if (skb) | |
1318 | local->total_ps_buffered--; | |
1319 | } | |
1320 | if (!skb) | |
1321 | break; | |
1322 | n_frames--; | |
1323 | __skb_queue_tail(&frames, skb); | |
1324 | } | |
1325 | } | |
1326 | ||
1327 | /* If we have more frames buffered on this AC, then set the | |
1328 | * more-data bit and abort the loop since we can't send more | |
1329 | * data from other ACs before the buffered frames from this. | |
1330 | */ | |
1331 | if (!skb_queue_empty(&sta->tx_filtered[ac]) || | |
1332 | !skb_queue_empty(&sta->ps_tx_buf[ac])) { | |
1333 | more_data = true; | |
1334 | break; | |
1335 | } | |
1336 | } | |
1337 | ||
1338 | if (skb_queue_empty(&frames) && !driver_release_tids) { | |
1339 | int tid; | |
1340 | ||
1341 | /* | |
1342 | * For PS-Poll, this can only happen due to a race condition | |
1343 | * when we set the TIM bit and the station notices it, but | |
1344 | * before it can poll for the frame we expire it. | |
1345 | * | |
1346 | * For uAPSD, this is said in the standard (11.2.1.5 h): | |
1347 | * At each unscheduled SP for a non-AP STA, the AP shall | |
1348 | * attempt to transmit at least one MSDU or MMPDU, but no | |
1349 | * more than the value specified in the Max SP Length field | |
1350 | * in the QoS Capability element from delivery-enabled ACs, | |
1351 | * that are destined for the non-AP STA. | |
1352 | * | |
1353 | * Since we have no other MSDU/MMPDU, transmit a QoS null frame. | |
1354 | */ | |
1355 | ||
1356 | /* This will evaluate to 1, 3, 5 or 7. */ | |
1357 | tid = 7 - ((ffs(~ignored_acs) - 1) << 1); | |
1358 | ||
1359 | ieee80211_send_null_response(sdata, sta, tid, reason, true); | |
1360 | } else if (!driver_release_tids) { | |
1361 | struct sk_buff_head pending; | |
1362 | struct sk_buff *skb; | |
1363 | int num = 0; | |
1364 | u16 tids = 0; | |
1365 | bool need_null = false; | |
1366 | ||
1367 | skb_queue_head_init(&pending); | |
1368 | ||
1369 | while ((skb = __skb_dequeue(&frames))) { | |
1370 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); | |
1371 | struct ieee80211_hdr *hdr = (void *) skb->data; | |
1372 | u8 *qoshdr = NULL; | |
1373 | ||
1374 | num++; | |
1375 | ||
1376 | /* | |
1377 | * Tell TX path to send this frame even though the | |
1378 | * STA may still remain is PS mode after this frame | |
1379 | * exchange. | |
1380 | */ | |
1381 | info->flags |= IEEE80211_TX_CTL_NO_PS_BUFFER | | |
1382 | IEEE80211_TX_CTL_PS_RESPONSE; | |
1383 | ||
1384 | /* | |
1385 | * Use MoreData flag to indicate whether there are | |
1386 | * more buffered frames for this STA | |
1387 | */ | |
1388 | if (more_data || !skb_queue_empty(&frames)) | |
1389 | hdr->frame_control |= | |
1390 | cpu_to_le16(IEEE80211_FCTL_MOREDATA); | |
1391 | else | |
1392 | hdr->frame_control &= | |
1393 | cpu_to_le16(~IEEE80211_FCTL_MOREDATA); | |
1394 | ||
1395 | if (ieee80211_is_data_qos(hdr->frame_control) || | |
1396 | ieee80211_is_qos_nullfunc(hdr->frame_control)) | |
1397 | qoshdr = ieee80211_get_qos_ctl(hdr); | |
1398 | ||
1399 | tids |= BIT(skb->priority); | |
1400 | ||
1401 | __skb_queue_tail(&pending, skb); | |
1402 | ||
1403 | /* end service period after last frame or add one */ | |
1404 | if (!skb_queue_empty(&frames)) | |
1405 | continue; | |
1406 | ||
1407 | if (reason != IEEE80211_FRAME_RELEASE_UAPSD) { | |
1408 | /* for PS-Poll, there's only one frame */ | |
1409 | info->flags |= IEEE80211_TX_STATUS_EOSP | | |
1410 | IEEE80211_TX_CTL_REQ_TX_STATUS; | |
1411 | break; | |
1412 | } | |
1413 | ||
1414 | /* For uAPSD, things are a bit more complicated. If the | |
1415 | * last frame has a QoS header (i.e. is a QoS-data or | |
1416 | * QoS-nulldata frame) then just set the EOSP bit there | |
1417 | * and be done. | |
1418 | * If the frame doesn't have a QoS header (which means | |
1419 | * it should be a bufferable MMPDU) then we can't set | |
1420 | * the EOSP bit in the QoS header; add a QoS-nulldata | |
1421 | * frame to the list to send it after the MMPDU. | |
1422 | * | |
1423 | * Note that this code is only in the mac80211-release | |
1424 | * code path, we assume that the driver will not buffer | |
1425 | * anything but QoS-data frames, or if it does, will | |
1426 | * create the QoS-nulldata frame by itself if needed. | |
1427 | * | |
1428 | * Cf. 802.11-2012 10.2.1.10 (c). | |
1429 | */ | |
1430 | if (qoshdr) { | |
1431 | *qoshdr |= IEEE80211_QOS_CTL_EOSP; | |
1432 | ||
1433 | info->flags |= IEEE80211_TX_STATUS_EOSP | | |
1434 | IEEE80211_TX_CTL_REQ_TX_STATUS; | |
1435 | } else { | |
1436 | /* The standard isn't completely clear on this | |
1437 | * as it says the more-data bit should be set | |
1438 | * if there are more BUs. The QoS-Null frame | |
1439 | * we're about to send isn't buffered yet, we | |
1440 | * only create it below, but let's pretend it | |
1441 | * was buffered just in case some clients only | |
1442 | * expect more-data=0 when eosp=1. | |
1443 | */ | |
1444 | hdr->frame_control |= | |
1445 | cpu_to_le16(IEEE80211_FCTL_MOREDATA); | |
1446 | need_null = true; | |
1447 | num++; | |
1448 | } | |
1449 | break; | |
1450 | } | |
1451 | ||
1452 | drv_allow_buffered_frames(local, sta, tids, num, | |
1453 | reason, more_data); | |
1454 | ||
1455 | ieee80211_add_pending_skbs(local, &pending); | |
1456 | ||
1457 | if (need_null) | |
1458 | ieee80211_send_null_response( | |
1459 | sdata, sta, find_highest_prio_tid(tids), | |
1460 | reason, false); | |
1461 | ||
1462 | sta_info_recalc_tim(sta); | |
1463 | } else { | |
1464 | /* | |
1465 | * We need to release a frame that is buffered somewhere in the | |
1466 | * driver ... it'll have to handle that. | |
1467 | * Note that the driver also has to check the number of frames | |
1468 | * on the TIDs we're releasing from - if there are more than | |
1469 | * n_frames it has to set the more-data bit (if we didn't ask | |
1470 | * it to set it anyway due to other buffered frames); if there | |
1471 | * are fewer than n_frames it has to make sure to adjust that | |
1472 | * to allow the service period to end properly. | |
1473 | */ | |
1474 | drv_release_buffered_frames(local, sta, driver_release_tids, | |
1475 | n_frames, reason, more_data); | |
1476 | ||
1477 | /* | |
1478 | * Note that we don't recalculate the TIM bit here as it would | |
1479 | * most likely have no effect at all unless the driver told us | |
1480 | * that the TID(s) became empty before returning here from the | |
1481 | * release function. | |
1482 | * Either way, however, when the driver tells us that the TID(s) | |
1483 | * became empty we'll do the TIM recalculation. | |
1484 | */ | |
1485 | } | |
1486 | } | |
1487 | ||
1488 | void ieee80211_sta_ps_deliver_poll_response(struct sta_info *sta) | |
1489 | { | |
1490 | u8 ignore_for_response = sta->sta.uapsd_queues; | |
1491 | ||
1492 | /* | |
1493 | * If all ACs are delivery-enabled then we should reply | |
1494 | * from any of them, if only some are enabled we reply | |
1495 | * only from the non-enabled ones. | |
1496 | */ | |
1497 | if (ignore_for_response == BIT(IEEE80211_NUM_ACS) - 1) | |
1498 | ignore_for_response = 0; | |
1499 | ||
1500 | ieee80211_sta_ps_deliver_response(sta, 1, ignore_for_response, | |
1501 | IEEE80211_FRAME_RELEASE_PSPOLL); | |
1502 | } | |
1503 | ||
1504 | void ieee80211_sta_ps_deliver_uapsd(struct sta_info *sta) | |
1505 | { | |
1506 | int n_frames = sta->sta.max_sp; | |
1507 | u8 delivery_enabled = sta->sta.uapsd_queues; | |
1508 | ||
1509 | /* | |
1510 | * If we ever grow support for TSPEC this might happen if | |
1511 | * the TSPEC update from hostapd comes in between a trigger | |
1512 | * frame setting WLAN_STA_UAPSD in the RX path and this | |
1513 | * actually getting called. | |
1514 | */ | |
1515 | if (!delivery_enabled) | |
1516 | return; | |
1517 | ||
1518 | switch (sta->sta.max_sp) { | |
1519 | case 1: | |
1520 | n_frames = 2; | |
1521 | break; | |
1522 | case 2: | |
1523 | n_frames = 4; | |
1524 | break; | |
1525 | case 3: | |
1526 | n_frames = 6; | |
1527 | break; | |
1528 | case 0: | |
1529 | /* XXX: what is a good value? */ | |
1530 | n_frames = 8; | |
1531 | break; | |
1532 | } | |
1533 | ||
1534 | ieee80211_sta_ps_deliver_response(sta, n_frames, ~delivery_enabled, | |
1535 | IEEE80211_FRAME_RELEASE_UAPSD); | |
1536 | } | |
1537 | ||
1538 | void ieee80211_sta_block_awake(struct ieee80211_hw *hw, | |
1539 | struct ieee80211_sta *pubsta, bool block) | |
1540 | { | |
1541 | struct sta_info *sta = container_of(pubsta, struct sta_info, sta); | |
1542 | ||
1543 | trace_api_sta_block_awake(sta->local, pubsta, block); | |
1544 | ||
1545 | if (block) { | |
1546 | set_sta_flag(sta, WLAN_STA_PS_DRIVER); | |
1547 | return; | |
1548 | } | |
1549 | ||
1550 | if (!test_sta_flag(sta, WLAN_STA_PS_DRIVER)) | |
1551 | return; | |
1552 | ||
1553 | if (!test_sta_flag(sta, WLAN_STA_PS_STA)) { | |
1554 | set_sta_flag(sta, WLAN_STA_PS_DELIVER); | |
1555 | clear_sta_flag(sta, WLAN_STA_PS_DRIVER); | |
1556 | ieee80211_queue_work(hw, &sta->drv_deliver_wk); | |
1557 | } else if (test_sta_flag(sta, WLAN_STA_PSPOLL) || | |
1558 | test_sta_flag(sta, WLAN_STA_UAPSD)) { | |
1559 | /* must be asleep in this case */ | |
1560 | clear_sta_flag(sta, WLAN_STA_PS_DRIVER); | |
1561 | ieee80211_queue_work(hw, &sta->drv_deliver_wk); | |
1562 | } else { | |
1563 | clear_sta_flag(sta, WLAN_STA_PS_DRIVER); | |
1564 | } | |
1565 | } | |
1566 | EXPORT_SYMBOL(ieee80211_sta_block_awake); | |
1567 | ||
1568 | void ieee80211_sta_eosp(struct ieee80211_sta *pubsta) | |
1569 | { | |
1570 | struct sta_info *sta = container_of(pubsta, struct sta_info, sta); | |
1571 | struct ieee80211_local *local = sta->local; | |
1572 | ||
1573 | trace_api_eosp(local, pubsta); | |
1574 | ||
1575 | clear_sta_flag(sta, WLAN_STA_SP); | |
1576 | } | |
1577 | EXPORT_SYMBOL(ieee80211_sta_eosp); | |
1578 | ||
1579 | void ieee80211_sta_set_buffered(struct ieee80211_sta *pubsta, | |
1580 | u8 tid, bool buffered) | |
1581 | { | |
1582 | struct sta_info *sta = container_of(pubsta, struct sta_info, sta); | |
1583 | ||
1584 | if (WARN_ON(tid >= IEEE80211_NUM_TIDS)) | |
1585 | return; | |
1586 | ||
1587 | trace_api_sta_set_buffered(sta->local, pubsta, tid, buffered); | |
1588 | ||
1589 | if (buffered) | |
1590 | set_bit(tid, &sta->driver_buffered_tids); | |
1591 | else | |
1592 | clear_bit(tid, &sta->driver_buffered_tids); | |
1593 | ||
1594 | sta_info_recalc_tim(sta); | |
1595 | } | |
1596 | EXPORT_SYMBOL(ieee80211_sta_set_buffered); | |
1597 | ||
1598 | int sta_info_move_state(struct sta_info *sta, | |
1599 | enum ieee80211_sta_state new_state) | |
1600 | { | |
1601 | might_sleep(); | |
1602 | ||
1603 | if (sta->sta_state == new_state) | |
1604 | return 0; | |
1605 | ||
1606 | /* check allowed transitions first */ | |
1607 | ||
1608 | switch (new_state) { | |
1609 | case IEEE80211_STA_NONE: | |
1610 | if (sta->sta_state != IEEE80211_STA_AUTH) | |
1611 | return -EINVAL; | |
1612 | break; | |
1613 | case IEEE80211_STA_AUTH: | |
1614 | if (sta->sta_state != IEEE80211_STA_NONE && | |
1615 | sta->sta_state != IEEE80211_STA_ASSOC) | |
1616 | return -EINVAL; | |
1617 | break; | |
1618 | case IEEE80211_STA_ASSOC: | |
1619 | if (sta->sta_state != IEEE80211_STA_AUTH && | |
1620 | sta->sta_state != IEEE80211_STA_AUTHORIZED) | |
1621 | return -EINVAL; | |
1622 | break; | |
1623 | case IEEE80211_STA_AUTHORIZED: | |
1624 | if (sta->sta_state != IEEE80211_STA_ASSOC) | |
1625 | return -EINVAL; | |
1626 | break; | |
1627 | default: | |
1628 | WARN(1, "invalid state %d", new_state); | |
1629 | return -EINVAL; | |
1630 | } | |
1631 | ||
1632 | sta_dbg(sta->sdata, "moving STA %pM to state %d\n", | |
1633 | sta->sta.addr, new_state); | |
1634 | ||
1635 | /* | |
1636 | * notify the driver before the actual changes so it can | |
1637 | * fail the transition | |
1638 | */ | |
1639 | if (test_sta_flag(sta, WLAN_STA_INSERTED)) { | |
1640 | int err = drv_sta_state(sta->local, sta->sdata, sta, | |
1641 | sta->sta_state, new_state); | |
1642 | if (err) | |
1643 | return err; | |
1644 | } | |
1645 | ||
1646 | /* reflect the change in all state variables */ | |
1647 | ||
1648 | switch (new_state) { | |
1649 | case IEEE80211_STA_NONE: | |
1650 | if (sta->sta_state == IEEE80211_STA_AUTH) | |
1651 | clear_bit(WLAN_STA_AUTH, &sta->_flags); | |
1652 | break; | |
1653 | case IEEE80211_STA_AUTH: | |
1654 | if (sta->sta_state == IEEE80211_STA_NONE) | |
1655 | set_bit(WLAN_STA_AUTH, &sta->_flags); | |
1656 | else if (sta->sta_state == IEEE80211_STA_ASSOC) | |
1657 | clear_bit(WLAN_STA_ASSOC, &sta->_flags); | |
1658 | break; | |
1659 | case IEEE80211_STA_ASSOC: | |
1660 | if (sta->sta_state == IEEE80211_STA_AUTH) { | |
1661 | set_bit(WLAN_STA_ASSOC, &sta->_flags); | |
1662 | } else if (sta->sta_state == IEEE80211_STA_AUTHORIZED) { | |
1663 | if (sta->sdata->vif.type == NL80211_IFTYPE_AP || | |
1664 | (sta->sdata->vif.type == NL80211_IFTYPE_AP_VLAN && | |
1665 | !sta->sdata->u.vlan.sta)) | |
1666 | atomic_dec(&sta->sdata->bss->num_mcast_sta); | |
1667 | clear_bit(WLAN_STA_AUTHORIZED, &sta->_flags); | |
1668 | } | |
1669 | break; | |
1670 | case IEEE80211_STA_AUTHORIZED: | |
1671 | if (sta->sta_state == IEEE80211_STA_ASSOC) { | |
1672 | if (sta->sdata->vif.type == NL80211_IFTYPE_AP || | |
1673 | (sta->sdata->vif.type == NL80211_IFTYPE_AP_VLAN && | |
1674 | !sta->sdata->u.vlan.sta)) | |
1675 | atomic_inc(&sta->sdata->bss->num_mcast_sta); | |
1676 | set_bit(WLAN_STA_AUTHORIZED, &sta->_flags); | |
1677 | } | |
1678 | break; | |
1679 | default: | |
1680 | break; | |
1681 | } | |
1682 | ||
1683 | sta->sta_state = new_state; | |
1684 | ||
1685 | return 0; | |
1686 | } | |
1687 | ||
1688 | u8 sta_info_tx_streams(struct sta_info *sta) | |
1689 | { | |
1690 | struct ieee80211_sta_ht_cap *ht_cap = &sta->sta.ht_cap; | |
1691 | u8 rx_streams; | |
1692 | ||
1693 | if (!sta->sta.ht_cap.ht_supported) | |
1694 | return 1; | |
1695 | ||
1696 | if (sta->sta.vht_cap.vht_supported) { | |
1697 | int i; | |
1698 | u16 tx_mcs_map = | |
1699 | le16_to_cpu(sta->sta.vht_cap.vht_mcs.tx_mcs_map); | |
1700 | ||
1701 | for (i = 7; i >= 0; i--) | |
1702 | if ((tx_mcs_map & (0x3 << (i * 2))) != | |
1703 | IEEE80211_VHT_MCS_NOT_SUPPORTED) | |
1704 | return i + 1; | |
1705 | } | |
1706 | ||
1707 | if (ht_cap->mcs.rx_mask[3]) | |
1708 | rx_streams = 4; | |
1709 | else if (ht_cap->mcs.rx_mask[2]) | |
1710 | rx_streams = 3; | |
1711 | else if (ht_cap->mcs.rx_mask[1]) | |
1712 | rx_streams = 2; | |
1713 | else | |
1714 | rx_streams = 1; | |
1715 | ||
1716 | if (!(ht_cap->mcs.tx_params & IEEE80211_HT_MCS_TX_RX_DIFF)) | |
1717 | return rx_streams; | |
1718 | ||
1719 | return ((ht_cap->mcs.tx_params & IEEE80211_HT_MCS_TX_MAX_STREAMS_MASK) | |
1720 | >> IEEE80211_HT_MCS_TX_MAX_STREAMS_SHIFT) + 1; | |
1721 | } | |
1722 | ||
1723 | void sta_set_sinfo(struct sta_info *sta, struct station_info *sinfo) | |
1724 | { | |
1725 | struct ieee80211_sub_if_data *sdata = sta->sdata; | |
1726 | struct ieee80211_local *local = sdata->local; | |
1727 | struct rate_control_ref *ref = local->rate_ctrl; | |
1728 | struct timespec uptime; | |
1729 | u64 packets = 0; | |
1730 | u32 thr = 0; | |
1731 | int i, ac; | |
1732 | ||
1733 | sinfo->generation = sdata->local->sta_generation; | |
1734 | ||
1735 | sinfo->filled = STATION_INFO_INACTIVE_TIME | | |
1736 | STATION_INFO_RX_BYTES64 | | |
1737 | STATION_INFO_TX_BYTES64 | | |
1738 | STATION_INFO_RX_PACKETS | | |
1739 | STATION_INFO_TX_PACKETS | | |
1740 | STATION_INFO_TX_RETRIES | | |
1741 | STATION_INFO_TX_FAILED | | |
1742 | STATION_INFO_TX_BITRATE | | |
1743 | STATION_INFO_RX_BITRATE | | |
1744 | STATION_INFO_RX_DROP_MISC | | |
1745 | STATION_INFO_BSS_PARAM | | |
1746 | STATION_INFO_CONNECTED_TIME | | |
1747 | STATION_INFO_STA_FLAGS | | |
1748 | STATION_INFO_BEACON_LOSS_COUNT; | |
1749 | ||
1750 | do_posix_clock_monotonic_gettime(&uptime); | |
1751 | sinfo->connected_time = uptime.tv_sec - sta->last_connected; | |
1752 | ||
1753 | sinfo->inactive_time = jiffies_to_msecs(jiffies - sta->last_rx); | |
1754 | sinfo->tx_bytes = 0; | |
1755 | for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) { | |
1756 | sinfo->tx_bytes += sta->tx_bytes[ac]; | |
1757 | packets += sta->tx_packets[ac]; | |
1758 | } | |
1759 | sinfo->tx_packets = packets; | |
1760 | sinfo->rx_bytes = sta->rx_bytes; | |
1761 | sinfo->rx_packets = sta->rx_packets; | |
1762 | sinfo->tx_retries = sta->tx_retry_count; | |
1763 | sinfo->tx_failed = sta->tx_retry_failed; | |
1764 | sinfo->rx_dropped_misc = sta->rx_dropped; | |
1765 | sinfo->beacon_loss_count = sta->beacon_loss_count; | |
1766 | ||
1767 | if ((sta->local->hw.flags & IEEE80211_HW_SIGNAL_DBM) || | |
1768 | (sta->local->hw.flags & IEEE80211_HW_SIGNAL_UNSPEC)) { | |
1769 | sinfo->filled |= STATION_INFO_SIGNAL | STATION_INFO_SIGNAL_AVG; | |
1770 | if (!local->ops->get_rssi || | |
1771 | drv_get_rssi(local, sdata, &sta->sta, &sinfo->signal)) | |
1772 | sinfo->signal = (s8)sta->last_signal; | |
1773 | sinfo->signal_avg = (s8) -ewma_read(&sta->avg_signal); | |
1774 | } | |
1775 | if (sta->chains) { | |
1776 | sinfo->filled |= STATION_INFO_CHAIN_SIGNAL | | |
1777 | STATION_INFO_CHAIN_SIGNAL_AVG; | |
1778 | ||
1779 | sinfo->chains = sta->chains; | |
1780 | for (i = 0; i < ARRAY_SIZE(sinfo->chain_signal); i++) { | |
1781 | sinfo->chain_signal[i] = sta->chain_signal_last[i]; | |
1782 | sinfo->chain_signal_avg[i] = | |
1783 | (s8) -ewma_read(&sta->chain_signal_avg[i]); | |
1784 | } | |
1785 | } | |
1786 | ||
1787 | sta_set_rate_info_tx(sta, &sta->last_tx_rate, &sinfo->txrate); | |
1788 | sta_set_rate_info_rx(sta, &sinfo->rxrate); | |
1789 | ||
1790 | if (ieee80211_vif_is_mesh(&sdata->vif)) { | |
1791 | #ifdef CONFIG_MAC80211_MESH | |
1792 | sinfo->filled |= STATION_INFO_LLID | | |
1793 | STATION_INFO_PLID | | |
1794 | STATION_INFO_PLINK_STATE | | |
1795 | STATION_INFO_LOCAL_PM | | |
1796 | STATION_INFO_PEER_PM | | |
1797 | STATION_INFO_NONPEER_PM; | |
1798 | ||
1799 | sinfo->llid = sta->llid; | |
1800 | sinfo->plid = sta->plid; | |
1801 | sinfo->plink_state = sta->plink_state; | |
1802 | if (test_sta_flag(sta, WLAN_STA_TOFFSET_KNOWN)) { | |
1803 | sinfo->filled |= STATION_INFO_T_OFFSET; | |
1804 | sinfo->t_offset = sta->t_offset; | |
1805 | } | |
1806 | sinfo->local_pm = sta->local_pm; | |
1807 | sinfo->peer_pm = sta->peer_pm; | |
1808 | sinfo->nonpeer_pm = sta->nonpeer_pm; | |
1809 | #endif | |
1810 | } | |
1811 | ||
1812 | sinfo->bss_param.flags = 0; | |
1813 | if (sdata->vif.bss_conf.use_cts_prot) | |
1814 | sinfo->bss_param.flags |= BSS_PARAM_FLAGS_CTS_PROT; | |
1815 | if (sdata->vif.bss_conf.use_short_preamble) | |
1816 | sinfo->bss_param.flags |= BSS_PARAM_FLAGS_SHORT_PREAMBLE; | |
1817 | if (sdata->vif.bss_conf.use_short_slot) | |
1818 | sinfo->bss_param.flags |= BSS_PARAM_FLAGS_SHORT_SLOT_TIME; | |
1819 | sinfo->bss_param.dtim_period = sdata->local->hw.conf.ps_dtim_period; | |
1820 | sinfo->bss_param.beacon_interval = sdata->vif.bss_conf.beacon_int; | |
1821 | ||
1822 | sinfo->sta_flags.set = 0; | |
1823 | sinfo->sta_flags.mask = BIT(NL80211_STA_FLAG_AUTHORIZED) | | |
1824 | BIT(NL80211_STA_FLAG_SHORT_PREAMBLE) | | |
1825 | BIT(NL80211_STA_FLAG_WME) | | |
1826 | BIT(NL80211_STA_FLAG_MFP) | | |
1827 | BIT(NL80211_STA_FLAG_AUTHENTICATED) | | |
1828 | BIT(NL80211_STA_FLAG_ASSOCIATED) | | |
1829 | BIT(NL80211_STA_FLAG_TDLS_PEER); | |
1830 | if (test_sta_flag(sta, WLAN_STA_AUTHORIZED)) | |
1831 | sinfo->sta_flags.set |= BIT(NL80211_STA_FLAG_AUTHORIZED); | |
1832 | if (test_sta_flag(sta, WLAN_STA_SHORT_PREAMBLE)) | |
1833 | sinfo->sta_flags.set |= BIT(NL80211_STA_FLAG_SHORT_PREAMBLE); | |
1834 | if (test_sta_flag(sta, WLAN_STA_WME)) | |
1835 | sinfo->sta_flags.set |= BIT(NL80211_STA_FLAG_WME); | |
1836 | if (test_sta_flag(sta, WLAN_STA_MFP)) | |
1837 | sinfo->sta_flags.set |= BIT(NL80211_STA_FLAG_MFP); | |
1838 | if (test_sta_flag(sta, WLAN_STA_AUTH)) | |
1839 | sinfo->sta_flags.set |= BIT(NL80211_STA_FLAG_AUTHENTICATED); | |
1840 | if (test_sta_flag(sta, WLAN_STA_ASSOC)) | |
1841 | sinfo->sta_flags.set |= BIT(NL80211_STA_FLAG_ASSOCIATED); | |
1842 | if (test_sta_flag(sta, WLAN_STA_TDLS_PEER)) | |
1843 | sinfo->sta_flags.set |= BIT(NL80211_STA_FLAG_TDLS_PEER); | |
1844 | ||
1845 | /* check if the driver has a SW RC implementation */ | |
1846 | if (ref && ref->ops->get_expected_throughput) | |
1847 | thr = ref->ops->get_expected_throughput(sta->rate_ctrl_priv); | |
1848 | else | |
1849 | thr = drv_get_expected_throughput(local, &sta->sta); | |
1850 | ||
1851 | if (thr != 0) { | |
1852 | sinfo->filled |= STATION_INFO_EXPECTED_THROUGHPUT; | |
1853 | sinfo->expected_throughput = thr; | |
1854 | } | |
1855 | } |