Commit | Line | Data |
---|---|---|
f0706e82 JB |
1 | /* |
2 | * Copyright 2002-2005, Instant802 Networks, Inc. | |
3 | * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz> | |
d98ad83e | 4 | * Copyright 2013-2014 Intel Mobile Communications GmbH |
f0706e82 JB |
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> | |
888d04df | 13 | #include <linux/etherdevice.h> |
f0706e82 JB |
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> | |
0d174406 | 19 | #include <linux/timer.h> |
d0709a65 | 20 | #include <linux/rtnetlink.h> |
f0706e82 JB |
21 | |
22 | #include <net/mac80211.h> | |
23 | #include "ieee80211_i.h" | |
24487981 | 24 | #include "driver-ops.h" |
2c8dccc7 | 25 | #include "rate.h" |
f0706e82 | 26 | #include "sta_info.h" |
e9f207f0 | 27 | #include "debugfs_sta.h" |
ee385855 | 28 | #include "mesh.h" |
ce662b44 | 29 | #include "wme.h" |
f0706e82 | 30 | |
d0709a65 JB |
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 | * | |
34e89507 JB |
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. | |
93e5deb1 JB |
46 | * |
47 | * When the insertion fails (sta_info_insert()) returns non-zero), the | |
48 | * structure will have been freed by sta_info_insert()! | |
d0709a65 | 49 | * |
34e89507 | 50 | * Station entries are added by mac80211 when you establish a link with a |
7e189a12 LR |
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 | |
25985edc | 53 | * receive an association response from the AP. For IBSS this occurs when |
34e89507 | 54 | * get to know about a peer on the same IBSS. For WDS we add the sta for |
25985edc | 55 | * the peer immediately upon device open. When using AP mode we add stations |
34e89507 | 56 | * for each respective station upon request from userspace through nl80211. |
7e189a12 | 57 | * |
34e89507 JB |
58 | * In order to remove a STA info structure, various sta_info_destroy_*() |
59 | * calls are available. | |
d0709a65 | 60 | * |
34e89507 JB |
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. | |
d0709a65 | 65 | */ |
f0706e82 | 66 | |
4d33960b | 67 | /* Caller must hold local->sta_mtx */ |
be8755e1 MW |
68 | static int sta_info_hash_del(struct ieee80211_local *local, |
69 | struct sta_info *sta) | |
f0706e82 JB |
70 | { |
71 | struct sta_info *s; | |
72 | ||
40b275b6 | 73 | s = rcu_dereference_protected(local->sta_hash[STA_HASH(sta->sta.addr)], |
4d33960b | 74 | lockdep_is_held(&local->sta_mtx)); |
f0706e82 | 75 | if (!s) |
be8755e1 MW |
76 | return -ENOENT; |
77 | if (s == sta) { | |
cf778b00 | 78 | rcu_assign_pointer(local->sta_hash[STA_HASH(sta->sta.addr)], |
d0709a65 | 79 | s->hnext); |
be8755e1 | 80 | return 0; |
f0706e82 JB |
81 | } |
82 | ||
40b275b6 JB |
83 | while (rcu_access_pointer(s->hnext) && |
84 | rcu_access_pointer(s->hnext) != sta) | |
85 | s = rcu_dereference_protected(s->hnext, | |
4d33960b | 86 | lockdep_is_held(&local->sta_mtx)); |
40b275b6 | 87 | if (rcu_access_pointer(s->hnext)) { |
cf778b00 | 88 | rcu_assign_pointer(s->hnext, sta->hnext); |
be8755e1 MW |
89 | return 0; |
90 | } | |
f0706e82 | 91 | |
be8755e1 | 92 | return -ENOENT; |
f0706e82 JB |
93 | } |
94 | ||
5108ca82 | 95 | static void __cleanup_single_sta(struct sta_info *sta) |
b22cfcfc | 96 | { |
b22cfcfc EP |
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; | |
d012a605 | 101 | struct ps_data *ps; |
b22cfcfc | 102 | |
e3685e03 | 103 | if (test_sta_flag(sta, WLAN_STA_PS_STA) || |
5ac2e350 JB |
104 | test_sta_flag(sta, WLAN_STA_PS_DRIVER) || |
105 | test_sta_flag(sta, WLAN_STA_PS_DELIVER)) { | |
d012a605 MP |
106 | if (sta->sdata->vif.type == NL80211_IFTYPE_AP || |
107 | sta->sdata->vif.type == NL80211_IFTYPE_AP_VLAN) | |
108 | ps = &sdata->bss->ps; | |
3f52b7e3 MP |
109 | else if (ieee80211_vif_is_mesh(&sdata->vif)) |
110 | ps = &sdata->u.mesh.ps; | |
d012a605 MP |
111 | else |
112 | return; | |
b22cfcfc EP |
113 | |
114 | clear_sta_flag(sta, WLAN_STA_PS_STA); | |
e3685e03 | 115 | clear_sta_flag(sta, WLAN_STA_PS_DRIVER); |
5ac2e350 | 116 | clear_sta_flag(sta, WLAN_STA_PS_DELIVER); |
b22cfcfc | 117 | |
d012a605 | 118 | atomic_dec(&ps->num_sta_ps); |
b22cfcfc EP |
119 | sta_info_recalc_tim(sta); |
120 | } | |
121 | ||
122 | for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) { | |
123 | local->total_ps_buffered -= skb_queue_len(&sta->ps_tx_buf[ac]); | |
1f98ab7f FF |
124 | ieee80211_purge_tx_queue(&local->hw, &sta->ps_tx_buf[ac]); |
125 | ieee80211_purge_tx_queue(&local->hw, &sta->tx_filtered[ac]); | |
b22cfcfc EP |
126 | } |
127 | ||
45b5028e TP |
128 | if (ieee80211_vif_is_mesh(&sdata->vif)) |
129 | mesh_sta_cleanup(sta); | |
b22cfcfc | 130 | |
5ac2e350 | 131 | cancel_work_sync(&sta->drv_deliver_wk); |
b22cfcfc EP |
132 | |
133 | /* | |
134 | * Destroy aggregation state here. It would be nice to wait for the | |
135 | * driver to finish aggregation stop and then clean up, but for now | |
136 | * drivers have to handle aggregation stop being requested, followed | |
137 | * directly by station destruction. | |
138 | */ | |
5a306f58 | 139 | for (i = 0; i < IEEE80211_NUM_TIDS; i++) { |
661eb381 | 140 | kfree(sta->ampdu_mlme.tid_start_tx[i]); |
b22cfcfc EP |
141 | tid_tx = rcu_dereference_raw(sta->ampdu_mlme.tid_tx[i]); |
142 | if (!tid_tx) | |
143 | continue; | |
1f98ab7f | 144 | ieee80211_purge_tx_queue(&local->hw, &tid_tx->pending); |
b22cfcfc EP |
145 | kfree(tid_tx); |
146 | } | |
5108ca82 | 147 | } |
b22cfcfc | 148 | |
5108ca82 JB |
149 | static void cleanup_single_sta(struct sta_info *sta) |
150 | { | |
151 | struct ieee80211_sub_if_data *sdata = sta->sdata; | |
152 | struct ieee80211_local *local = sdata->local; | |
153 | ||
154 | __cleanup_single_sta(sta); | |
b22cfcfc EP |
155 | sta_info_free(local, sta); |
156 | } | |
157 | ||
d0709a65 | 158 | /* protected by RCU */ |
abe60632 JB |
159 | struct sta_info *sta_info_get(struct ieee80211_sub_if_data *sdata, |
160 | const u8 *addr) | |
f0706e82 | 161 | { |
abe60632 | 162 | struct ieee80211_local *local = sdata->local; |
f0706e82 JB |
163 | struct sta_info *sta; |
164 | ||
0379185b | 165 | sta = rcu_dereference_check(local->sta_hash[STA_HASH(addr)], |
0379185b | 166 | lockdep_is_held(&local->sta_mtx)); |
f0706e82 | 167 | while (sta) { |
abe60632 | 168 | if (sta->sdata == sdata && |
b203ca39 | 169 | ether_addr_equal(sta->sta.addr, addr)) |
f0706e82 | 170 | break; |
0379185b | 171 | sta = rcu_dereference_check(sta->hnext, |
0379185b | 172 | lockdep_is_held(&local->sta_mtx)); |
f0706e82 | 173 | } |
43ba7e95 JB |
174 | return sta; |
175 | } | |
176 | ||
0e5ded5a FF |
177 | /* |
178 | * Get sta info either from the specified interface | |
179 | * or from one of its vlans | |
180 | */ | |
181 | struct sta_info *sta_info_get_bss(struct ieee80211_sub_if_data *sdata, | |
182 | const u8 *addr) | |
183 | { | |
184 | struct ieee80211_local *local = sdata->local; | |
185 | struct sta_info *sta; | |
186 | ||
0379185b | 187 | sta = rcu_dereference_check(local->sta_hash[STA_HASH(addr)], |
0379185b | 188 | lockdep_is_held(&local->sta_mtx)); |
0e5ded5a FF |
189 | while (sta) { |
190 | if ((sta->sdata == sdata || | |
a2c1e3da | 191 | (sta->sdata->bss && sta->sdata->bss == sdata->bss)) && |
b203ca39 | 192 | ether_addr_equal(sta->sta.addr, addr)) |
0e5ded5a | 193 | break; |
0379185b | 194 | sta = rcu_dereference_check(sta->hnext, |
0379185b | 195 | lockdep_is_held(&local->sta_mtx)); |
0e5ded5a FF |
196 | } |
197 | return sta; | |
198 | } | |
199 | ||
3b53fde8 JB |
200 | struct sta_info *sta_info_get_by_idx(struct ieee80211_sub_if_data *sdata, |
201 | int idx) | |
ee385855 | 202 | { |
3b53fde8 | 203 | struct ieee80211_local *local = sdata->local; |
ee385855 LCC |
204 | struct sta_info *sta; |
205 | int i = 0; | |
206 | ||
d0709a65 | 207 | list_for_each_entry_rcu(sta, &local->sta_list, list) { |
3b53fde8 | 208 | if (sdata != sta->sdata) |
2a8ca29a | 209 | continue; |
ee385855 LCC |
210 | if (i < idx) { |
211 | ++i; | |
212 | continue; | |
ee385855 | 213 | } |
2a8ca29a | 214 | return sta; |
ee385855 | 215 | } |
ee385855 LCC |
216 | |
217 | return NULL; | |
218 | } | |
f0706e82 | 219 | |
93e5deb1 | 220 | /** |
d9a7ddb0 | 221 | * sta_info_free - free STA |
93e5deb1 | 222 | * |
6ef307bc | 223 | * @local: pointer to the global information |
93e5deb1 JB |
224 | * @sta: STA info to free |
225 | * | |
226 | * This function must undo everything done by sta_info_alloc() | |
d9a7ddb0 JB |
227 | * that may happen before sta_info_insert(). It may only be |
228 | * called when sta_info_insert() has not been attempted (and | |
229 | * if that fails, the station is freed anyway.) | |
93e5deb1 | 230 | */ |
d9a7ddb0 | 231 | void sta_info_free(struct ieee80211_local *local, struct sta_info *sta) |
93e5deb1 | 232 | { |
ad38bfc9 MG |
233 | int i; |
234 | ||
889cbb91 | 235 | if (sta->rate_ctrl) |
af65cd96 | 236 | rate_control_free_sta(sta); |
93e5deb1 | 237 | |
ad38bfc9 MG |
238 | if (sta->tx_lat) { |
239 | for (i = 0; i < IEEE80211_NUM_TIDS; i++) | |
240 | kfree(sta->tx_lat[i].bins); | |
241 | kfree(sta->tx_lat); | |
242 | } | |
243 | ||
bdcbd8e0 | 244 | sta_dbg(sta->sdata, "Destroyed STA %pM\n", sta->sta.addr); |
93e5deb1 | 245 | |
53d04525 | 246 | kfree(rcu_dereference_raw(sta->sta.rates)); |
93e5deb1 JB |
247 | kfree(sta); |
248 | } | |
249 | ||
4d33960b | 250 | /* Caller must hold local->sta_mtx */ |
d0709a65 JB |
251 | static void sta_info_hash_add(struct ieee80211_local *local, |
252 | struct sta_info *sta) | |
f0706e82 | 253 | { |
4d33960b | 254 | lockdep_assert_held(&local->sta_mtx); |
17741cdc | 255 | sta->hnext = local->sta_hash[STA_HASH(sta->sta.addr)]; |
cf778b00 | 256 | rcu_assign_pointer(local->sta_hash[STA_HASH(sta->sta.addr)], sta); |
f0706e82 | 257 | } |
f0706e82 | 258 | |
5ac2e350 | 259 | static void sta_deliver_ps_frames(struct work_struct *wk) |
af818581 JB |
260 | { |
261 | struct sta_info *sta; | |
262 | ||
5ac2e350 | 263 | sta = container_of(wk, struct sta_info, drv_deliver_wk); |
af818581 JB |
264 | |
265 | if (sta->dead) | |
266 | return; | |
267 | ||
5ac2e350 JB |
268 | local_bh_disable(); |
269 | if (!test_sta_flag(sta, WLAN_STA_PS_STA)) | |
af818581 | 270 | ieee80211_sta_ps_deliver_wakeup(sta); |
5ac2e350 | 271 | else if (test_and_clear_sta_flag(sta, WLAN_STA_PSPOLL)) |
af818581 | 272 | ieee80211_sta_ps_deliver_poll_response(sta); |
5ac2e350 | 273 | else if (test_and_clear_sta_flag(sta, WLAN_STA_UAPSD)) |
47086fc5 | 274 | ieee80211_sta_ps_deliver_uapsd(sta); |
5ac2e350 | 275 | local_bh_enable(); |
af818581 JB |
276 | } |
277 | ||
af65cd96 JB |
278 | static int sta_prepare_rate_control(struct ieee80211_local *local, |
279 | struct sta_info *sta, gfp_t gfp) | |
280 | { | |
281 | if (local->hw.flags & IEEE80211_HW_HAS_RATE_CONTROL) | |
282 | return 0; | |
283 | ||
889cbb91 | 284 | sta->rate_ctrl = local->rate_ctrl; |
af65cd96 JB |
285 | sta->rate_ctrl_priv = rate_control_alloc_sta(sta->rate_ctrl, |
286 | &sta->sta, gfp); | |
889cbb91 | 287 | if (!sta->rate_ctrl_priv) |
af65cd96 | 288 | return -ENOMEM; |
af65cd96 JB |
289 | |
290 | return 0; | |
291 | } | |
292 | ||
73651ee6 | 293 | struct sta_info *sta_info_alloc(struct ieee80211_sub_if_data *sdata, |
56544160 | 294 | const u8 *addr, gfp_t gfp) |
f0706e82 | 295 | { |
d0709a65 | 296 | struct ieee80211_local *local = sdata->local; |
f0706e82 | 297 | struct sta_info *sta; |
ebe27c91 | 298 | struct timespec uptime; |
ad38bfc9 | 299 | struct ieee80211_tx_latency_bin_ranges *tx_latency; |
16c5f15c | 300 | int i; |
f0706e82 | 301 | |
17741cdc | 302 | sta = kzalloc(sizeof(*sta) + local->hw.sta_data_size, gfp); |
f0706e82 | 303 | if (!sta) |
73651ee6 | 304 | return NULL; |
f0706e82 | 305 | |
ef04a297 JB |
306 | rcu_read_lock(); |
307 | tx_latency = rcu_dereference(local->tx_latency); | |
308 | /* init stations Tx latency statistics && TID bins */ | |
309 | if (tx_latency) { | |
310 | sta->tx_lat = kzalloc(IEEE80211_NUM_TIDS * | |
311 | sizeof(struct ieee80211_tx_latency_stat), | |
312 | GFP_ATOMIC); | |
313 | if (!sta->tx_lat) { | |
314 | rcu_read_unlock(); | |
315 | goto free; | |
316 | } | |
317 | ||
318 | if (tx_latency->n_ranges) { | |
319 | for (i = 0; i < IEEE80211_NUM_TIDS; i++) { | |
320 | /* size of bins is size of the ranges +1 */ | |
321 | sta->tx_lat[i].bin_count = | |
322 | tx_latency->n_ranges + 1; | |
323 | sta->tx_lat[i].bins = | |
324 | kcalloc(sta->tx_lat[i].bin_count, | |
325 | sizeof(u32), GFP_ATOMIC); | |
326 | if (!sta->tx_lat[i].bins) { | |
327 | rcu_read_unlock(); | |
328 | goto free; | |
329 | } | |
330 | } | |
331 | } | |
332 | } | |
333 | rcu_read_unlock(); | |
334 | ||
07346f81 | 335 | spin_lock_init(&sta->lock); |
1d147bfa | 336 | spin_lock_init(&sta->ps_lock); |
5ac2e350 | 337 | INIT_WORK(&sta->drv_deliver_wk, sta_deliver_ps_frames); |
67c282c0 | 338 | INIT_WORK(&sta->ampdu_mlme.work, ieee80211_ba_session_work); |
a93e3644 | 339 | mutex_init(&sta->ampdu_mlme.mtx); |
87f59c70 TP |
340 | #ifdef CONFIG_MAC80211_MESH |
341 | if (ieee80211_vif_is_mesh(&sdata->vif) && | |
342 | !sdata->u.mesh.user_mpm) | |
343 | init_timer(&sta->plink_timer); | |
6c7c4cbf | 344 | sta->nonpeer_pm = NL80211_MESH_POWER_ACTIVE; |
87f59c70 | 345 | #endif |
07346f81 | 346 | |
17741cdc | 347 | memcpy(sta->sta.addr, addr, ETH_ALEN); |
d0709a65 JB |
348 | sta->local = local; |
349 | sta->sdata = sdata; | |
8bc8aecd | 350 | sta->last_rx = jiffies; |
f0706e82 | 351 | |
71ec375c JB |
352 | sta->sta_state = IEEE80211_STA_NONE; |
353 | ||
18171520 | 354 | ktime_get_ts(&uptime); |
ebe27c91 | 355 | sta->last_connected = uptime.tv_sec; |
541a45a1 | 356 | ewma_init(&sta->avg_signal, 1024, 8); |
ef0621e8 FF |
357 | for (i = 0; i < ARRAY_SIZE(sta->chain_signal_avg); i++) |
358 | ewma_init(&sta->chain_signal_avg[i], 1024, 8); | |
541a45a1 | 359 | |
ef04a297 JB |
360 | if (sta_prepare_rate_control(local, sta, gfp)) |
361 | goto free; | |
f0706e82 | 362 | |
5a306f58 | 363 | for (i = 0; i < IEEE80211_NUM_TIDS; i++) { |
a622ab72 JB |
364 | /* |
365 | * timer_to_tid must be initialized with identity mapping | |
366 | * to enable session_timer's data differentiation. See | |
367 | * sta_rx_agg_session_timer_expired for usage. | |
368 | */ | |
16c5f15c | 369 | sta->timer_to_tid[i] = i; |
16c5f15c | 370 | } |
948d887d JB |
371 | for (i = 0; i < IEEE80211_NUM_ACS; i++) { |
372 | skb_queue_head_init(&sta->ps_tx_buf[i]); | |
373 | skb_queue_head_init(&sta->tx_filtered[i]); | |
374 | } | |
73651ee6 | 375 | |
5a306f58 | 376 | for (i = 0; i < IEEE80211_NUM_TIDS; i++) |
4be929be | 377 | sta->last_seq_ctrl[i] = cpu_to_le16(USHRT_MAX); |
cccaec98 | 378 | |
af0ed69b | 379 | sta->sta.smps_mode = IEEE80211_SMPS_OFF; |
687da132 EG |
380 | if (sdata->vif.type == NL80211_IFTYPE_AP || |
381 | sdata->vif.type == NL80211_IFTYPE_AP_VLAN) { | |
382 | struct ieee80211_supported_band *sband = | |
383 | local->hw.wiphy->bands[ieee80211_get_sdata_band(sdata)]; | |
384 | u8 smps = (sband->ht_cap.cap & IEEE80211_HT_CAP_SM_PS) >> | |
385 | IEEE80211_HT_CAP_SM_PS_SHIFT; | |
386 | /* | |
387 | * Assume that hostapd advertises our caps in the beacon and | |
388 | * this is the known_smps_mode for a station that just assciated | |
389 | */ | |
390 | switch (smps) { | |
391 | case WLAN_HT_SMPS_CONTROL_DISABLED: | |
392 | sta->known_smps_mode = IEEE80211_SMPS_OFF; | |
393 | break; | |
394 | case WLAN_HT_SMPS_CONTROL_STATIC: | |
395 | sta->known_smps_mode = IEEE80211_SMPS_STATIC; | |
396 | break; | |
397 | case WLAN_HT_SMPS_CONTROL_DYNAMIC: | |
398 | sta->known_smps_mode = IEEE80211_SMPS_DYNAMIC; | |
399 | break; | |
400 | default: | |
401 | WARN_ON(1); | |
402 | } | |
403 | } | |
af0ed69b | 404 | |
bdcbd8e0 | 405 | sta_dbg(sdata, "Allocated STA %pM\n", sta->sta.addr); |
73651ee6 | 406 | return sta; |
ef04a297 JB |
407 | |
408 | free: | |
409 | if (sta->tx_lat) { | |
410 | for (i = 0; i < IEEE80211_NUM_TIDS; i++) | |
411 | kfree(sta->tx_lat[i].bins); | |
412 | kfree(sta->tx_lat); | |
413 | } | |
414 | kfree(sta); | |
415 | return NULL; | |
73651ee6 JB |
416 | } |
417 | ||
8c71df7a | 418 | static int sta_info_insert_check(struct sta_info *sta) |
34e89507 | 419 | { |
34e89507 | 420 | struct ieee80211_sub_if_data *sdata = sta->sdata; |
34e89507 | 421 | |
03e4497e JB |
422 | /* |
423 | * Can't be a WARN_ON because it can be triggered through a race: | |
424 | * something inserts a STA (on one CPU) without holding the RTNL | |
425 | * and another CPU turns off the net device. | |
426 | */ | |
8c71df7a GE |
427 | if (unlikely(!ieee80211_sdata_running(sdata))) |
428 | return -ENETDOWN; | |
03e4497e | 429 | |
b203ca39 | 430 | if (WARN_ON(ether_addr_equal(sta->sta.addr, sdata->vif.addr) || |
8c71df7a GE |
431 | is_multicast_ether_addr(sta->sta.addr))) |
432 | return -EINVAL; | |
433 | ||
434 | return 0; | |
435 | } | |
436 | ||
f09603a2 JB |
437 | static int sta_info_insert_drv_state(struct ieee80211_local *local, |
438 | struct ieee80211_sub_if_data *sdata, | |
439 | struct sta_info *sta) | |
440 | { | |
441 | enum ieee80211_sta_state state; | |
442 | int err = 0; | |
443 | ||
444 | for (state = IEEE80211_STA_NOTEXIST; state < sta->sta_state; state++) { | |
445 | err = drv_sta_state(local, sdata, sta, state, state + 1); | |
446 | if (err) | |
447 | break; | |
448 | } | |
449 | ||
450 | if (!err) { | |
a4ec45a4 JB |
451 | /* |
452 | * Drivers using legacy sta_add/sta_remove callbacks only | |
453 | * get uploaded set to true after sta_add is called. | |
454 | */ | |
455 | if (!local->ops->sta_add) | |
456 | sta->uploaded = true; | |
f09603a2 JB |
457 | return 0; |
458 | } | |
459 | ||
460 | if (sdata->vif.type == NL80211_IFTYPE_ADHOC) { | |
bdcbd8e0 JB |
461 | sdata_info(sdata, |
462 | "failed to move IBSS STA %pM to state %d (%d) - keeping it anyway\n", | |
463 | sta->sta.addr, state + 1, err); | |
f09603a2 JB |
464 | err = 0; |
465 | } | |
466 | ||
467 | /* unwind on error */ | |
468 | for (; state > IEEE80211_STA_NOTEXIST; state--) | |
469 | WARN_ON(drv_sta_state(local, sdata, sta, state, state - 1)); | |
470 | ||
471 | return err; | |
472 | } | |
473 | ||
8c71df7a GE |
474 | /* |
475 | * should be called with sta_mtx locked | |
476 | * this function replaces the mutex lock | |
477 | * with a RCU lock | |
478 | */ | |
4d33960b | 479 | static int sta_info_insert_finish(struct sta_info *sta) __acquires(RCU) |
8c71df7a GE |
480 | { |
481 | struct ieee80211_local *local = sta->local; | |
482 | struct ieee80211_sub_if_data *sdata = sta->sdata; | |
7852e361 | 483 | struct station_info sinfo; |
8c71df7a GE |
484 | int err = 0; |
485 | ||
486 | lockdep_assert_held(&local->sta_mtx); | |
34e89507 | 487 | |
7852e361 JB |
488 | /* check if STA exists already */ |
489 | if (sta_info_get_bss(sdata, sta->sta.addr)) { | |
490 | err = -EEXIST; | |
491 | goto out_err; | |
4d33960b | 492 | } |
32bfd35d | 493 | |
7852e361 JB |
494 | local->num_sta++; |
495 | local->sta_generation++; | |
496 | smp_mb(); | |
4d33960b | 497 | |
5108ca82 JB |
498 | /* simplify things and don't accept BA sessions yet */ |
499 | set_sta_flag(sta, WLAN_STA_BLOCK_BA); | |
500 | ||
7852e361 JB |
501 | /* make the station visible */ |
502 | sta_info_hash_add(local, sta); | |
83d5cc01 | 503 | |
794454ce | 504 | list_add_rcu(&sta->list, &local->sta_list); |
4d33960b | 505 | |
5108ca82 JB |
506 | /* notify driver */ |
507 | err = sta_info_insert_drv_state(local, sdata, sta); | |
508 | if (err) | |
509 | goto out_remove; | |
510 | ||
7852e361 | 511 | set_sta_flag(sta, WLAN_STA_INSERTED); |
5108ca82 JB |
512 | /* accept BA sessions now */ |
513 | clear_sta_flag(sta, WLAN_STA_BLOCK_BA); | |
4d33960b | 514 | |
21f659bf | 515 | ieee80211_recalc_min_chandef(sdata); |
7852e361 JB |
516 | ieee80211_sta_debugfs_add(sta); |
517 | rate_control_add_sta_debugfs(sta); | |
4d33960b | 518 | |
7852e361 JB |
519 | memset(&sinfo, 0, sizeof(sinfo)); |
520 | sinfo.filled = 0; | |
521 | sinfo.generation = local->sta_generation; | |
522 | cfg80211_new_sta(sdata->dev, sta->sta.addr, &sinfo, GFP_KERNEL); | |
d0709a65 | 523 | |
bdcbd8e0 | 524 | sta_dbg(sdata, "Inserted STA %pM\n", sta->sta.addr); |
f0706e82 | 525 | |
34e89507 JB |
526 | /* move reference to rcu-protected */ |
527 | rcu_read_lock(); | |
528 | mutex_unlock(&local->sta_mtx); | |
e9f207f0 | 529 | |
73651ee6 JB |
530 | if (ieee80211_vif_is_mesh(&sdata->vif)) |
531 | mesh_accept_plinks_update(sdata); | |
532 | ||
8c71df7a | 533 | return 0; |
5108ca82 JB |
534 | out_remove: |
535 | sta_info_hash_del(local, sta); | |
536 | list_del_rcu(&sta->list); | |
537 | local->num_sta--; | |
538 | synchronize_net(); | |
539 | __cleanup_single_sta(sta); | |
4d33960b JB |
540 | out_err: |
541 | mutex_unlock(&local->sta_mtx); | |
542 | rcu_read_lock(); | |
543 | return err; | |
8c71df7a GE |
544 | } |
545 | ||
546 | int sta_info_insert_rcu(struct sta_info *sta) __acquires(RCU) | |
547 | { | |
548 | struct ieee80211_local *local = sta->local; | |
308f7fcf | 549 | int err; |
8c71df7a | 550 | |
4d33960b JB |
551 | might_sleep(); |
552 | ||
8c71df7a GE |
553 | err = sta_info_insert_check(sta); |
554 | if (err) { | |
555 | rcu_read_lock(); | |
556 | goto out_free; | |
557 | } | |
558 | ||
8c71df7a GE |
559 | mutex_lock(&local->sta_mtx); |
560 | ||
4d33960b | 561 | err = sta_info_insert_finish(sta); |
8c71df7a GE |
562 | if (err) |
563 | goto out_free; | |
564 | ||
73651ee6 | 565 | return 0; |
93e5deb1 | 566 | out_free: |
d9a7ddb0 | 567 | sta_info_free(local, sta); |
93e5deb1 | 568 | return err; |
f0706e82 JB |
569 | } |
570 | ||
34e89507 JB |
571 | int sta_info_insert(struct sta_info *sta) |
572 | { | |
573 | int err = sta_info_insert_rcu(sta); | |
574 | ||
575 | rcu_read_unlock(); | |
576 | ||
577 | return err; | |
578 | } | |
579 | ||
d012a605 | 580 | static inline void __bss_tim_set(u8 *tim, u16 id) |
004c872e JB |
581 | { |
582 | /* | |
583 | * This format has been mandated by the IEEE specifications, | |
584 | * so this line may not be changed to use the __set_bit() format. | |
585 | */ | |
d012a605 | 586 | tim[id / 8] |= (1 << (id % 8)); |
004c872e JB |
587 | } |
588 | ||
d012a605 | 589 | static inline void __bss_tim_clear(u8 *tim, u16 id) |
004c872e JB |
590 | { |
591 | /* | |
592 | * This format has been mandated by the IEEE specifications, | |
593 | * so this line may not be changed to use the __clear_bit() format. | |
594 | */ | |
d012a605 | 595 | tim[id / 8] &= ~(1 << (id % 8)); |
004c872e JB |
596 | } |
597 | ||
3d5839b6 IP |
598 | static inline bool __bss_tim_get(u8 *tim, u16 id) |
599 | { | |
600 | /* | |
601 | * This format has been mandated by the IEEE specifications, | |
602 | * so this line may not be changed to use the test_bit() format. | |
603 | */ | |
604 | return tim[id / 8] & (1 << (id % 8)); | |
605 | } | |
606 | ||
948d887d | 607 | static unsigned long ieee80211_tids_for_ac(int ac) |
004c872e | 608 | { |
948d887d JB |
609 | /* If we ever support TIDs > 7, this obviously needs to be adjusted */ |
610 | switch (ac) { | |
611 | case IEEE80211_AC_VO: | |
612 | return BIT(6) | BIT(7); | |
613 | case IEEE80211_AC_VI: | |
614 | return BIT(4) | BIT(5); | |
615 | case IEEE80211_AC_BE: | |
616 | return BIT(0) | BIT(3); | |
617 | case IEEE80211_AC_BK: | |
618 | return BIT(1) | BIT(2); | |
619 | default: | |
620 | WARN_ON(1); | |
621 | return 0; | |
d0709a65 | 622 | } |
004c872e JB |
623 | } |
624 | ||
c868cb35 | 625 | void sta_info_recalc_tim(struct sta_info *sta) |
004c872e | 626 | { |
c868cb35 | 627 | struct ieee80211_local *local = sta->local; |
d012a605 | 628 | struct ps_data *ps; |
948d887d JB |
629 | bool indicate_tim = false; |
630 | u8 ignore_for_tim = sta->sta.uapsd_queues; | |
631 | int ac; | |
d012a605 MP |
632 | u16 id; |
633 | ||
634 | if (sta->sdata->vif.type == NL80211_IFTYPE_AP || | |
635 | sta->sdata->vif.type == NL80211_IFTYPE_AP_VLAN) { | |
636 | if (WARN_ON_ONCE(!sta->sdata->bss)) | |
637 | return; | |
004c872e | 638 | |
d012a605 MP |
639 | ps = &sta->sdata->bss->ps; |
640 | id = sta->sta.aid; | |
3f52b7e3 MP |
641 | #ifdef CONFIG_MAC80211_MESH |
642 | } else if (ieee80211_vif_is_mesh(&sta->sdata->vif)) { | |
643 | ps = &sta->sdata->u.mesh.ps; | |
204d1304 | 644 | /* TIM map only for 1 <= PLID <= IEEE80211_MAX_AID */ |
6f101ef0 | 645 | id = sta->plid % (IEEE80211_MAX_AID + 1); |
3f52b7e3 | 646 | #endif |
d012a605 | 647 | } else { |
c868cb35 | 648 | return; |
d012a605 | 649 | } |
3e122be0 | 650 | |
c868cb35 JB |
651 | /* No need to do anything if the driver does all */ |
652 | if (local->hw.flags & IEEE80211_HW_AP_LINK_PS) | |
653 | return; | |
004c872e | 654 | |
c868cb35 JB |
655 | if (sta->dead) |
656 | goto done; | |
3e122be0 | 657 | |
948d887d JB |
658 | /* |
659 | * If all ACs are delivery-enabled then we should build | |
660 | * the TIM bit for all ACs anyway; if only some are then | |
661 | * we ignore those and build the TIM bit using only the | |
662 | * non-enabled ones. | |
663 | */ | |
664 | if (ignore_for_tim == BIT(IEEE80211_NUM_ACS) - 1) | |
665 | ignore_for_tim = 0; | |
666 | ||
667 | for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) { | |
668 | unsigned long tids; | |
3e122be0 | 669 | |
948d887d JB |
670 | if (ignore_for_tim & BIT(ac)) |
671 | continue; | |
672 | ||
673 | indicate_tim |= !skb_queue_empty(&sta->tx_filtered[ac]) || | |
674 | !skb_queue_empty(&sta->ps_tx_buf[ac]); | |
675 | if (indicate_tim) | |
676 | break; | |
3e122be0 | 677 | |
948d887d JB |
678 | tids = ieee80211_tids_for_ac(ac); |
679 | ||
680 | indicate_tim |= | |
681 | sta->driver_buffered_tids & tids; | |
d0709a65 | 682 | } |
004c872e | 683 | |
c868cb35 | 684 | done: |
65f704a5 | 685 | spin_lock_bh(&local->tim_lock); |
004c872e | 686 | |
3d5839b6 IP |
687 | if (indicate_tim == __bss_tim_get(ps->tim, id)) |
688 | goto out_unlock; | |
689 | ||
948d887d | 690 | if (indicate_tim) |
d012a605 | 691 | __bss_tim_set(ps->tim, id); |
c868cb35 | 692 | else |
d012a605 | 693 | __bss_tim_clear(ps->tim, id); |
004c872e | 694 | |
c868cb35 JB |
695 | if (local->ops->set_tim) { |
696 | local->tim_in_locked_section = true; | |
948d887d | 697 | drv_set_tim(local, &sta->sta, indicate_tim); |
c868cb35 JB |
698 | local->tim_in_locked_section = false; |
699 | } | |
3e122be0 | 700 | |
3d5839b6 | 701 | out_unlock: |
65f704a5 | 702 | spin_unlock_bh(&local->tim_lock); |
004c872e JB |
703 | } |
704 | ||
cd0b8d89 | 705 | static bool sta_info_buffer_expired(struct sta_info *sta, struct sk_buff *skb) |
f0706e82 | 706 | { |
e039fa4a | 707 | struct ieee80211_tx_info *info; |
f0706e82 JB |
708 | int timeout; |
709 | ||
710 | if (!skb) | |
cd0b8d89 | 711 | return false; |
f0706e82 | 712 | |
e039fa4a | 713 | info = IEEE80211_SKB_CB(skb); |
f0706e82 JB |
714 | |
715 | /* Timeout: (2 * listen_interval * beacon_int * 1024 / 1000000) sec */ | |
57c4d7b4 JB |
716 | timeout = (sta->listen_interval * |
717 | sta->sdata->vif.bss_conf.beacon_int * | |
718 | 32 / 15625) * HZ; | |
f0706e82 JB |
719 | if (timeout < STA_TX_BUFFER_EXPIRE) |
720 | timeout = STA_TX_BUFFER_EXPIRE; | |
e039fa4a | 721 | return time_after(jiffies, info->control.jiffies + timeout); |
f0706e82 JB |
722 | } |
723 | ||
724 | ||
948d887d JB |
725 | static bool sta_info_cleanup_expire_buffered_ac(struct ieee80211_local *local, |
726 | struct sta_info *sta, int ac) | |
f0706e82 JB |
727 | { |
728 | unsigned long flags; | |
729 | struct sk_buff *skb; | |
730 | ||
60750397 JB |
731 | /* |
732 | * First check for frames that should expire on the filtered | |
733 | * queue. Frames here were rejected by the driver and are on | |
734 | * a separate queue to avoid reordering with normal PS-buffered | |
735 | * frames. They also aren't accounted for right now in the | |
736 | * total_ps_buffered counter. | |
737 | */ | |
738 | for (;;) { | |
948d887d JB |
739 | spin_lock_irqsave(&sta->tx_filtered[ac].lock, flags); |
740 | skb = skb_peek(&sta->tx_filtered[ac]); | |
60750397 | 741 | if (sta_info_buffer_expired(sta, skb)) |
948d887d | 742 | skb = __skb_dequeue(&sta->tx_filtered[ac]); |
60750397 JB |
743 | else |
744 | skb = NULL; | |
948d887d | 745 | spin_unlock_irqrestore(&sta->tx_filtered[ac].lock, flags); |
60750397 JB |
746 | |
747 | /* | |
748 | * Frames are queued in order, so if this one | |
749 | * hasn't expired yet we can stop testing. If | |
750 | * we actually reached the end of the queue we | |
751 | * also need to stop, of course. | |
752 | */ | |
753 | if (!skb) | |
754 | break; | |
d4fa14cd | 755 | ieee80211_free_txskb(&local->hw, skb); |
60750397 JB |
756 | } |
757 | ||
758 | /* | |
759 | * Now also check the normal PS-buffered queue, this will | |
760 | * only find something if the filtered queue was emptied | |
761 | * since the filtered frames are all before the normal PS | |
762 | * buffered frames. | |
763 | */ | |
f0706e82 | 764 | for (;;) { |
948d887d JB |
765 | spin_lock_irqsave(&sta->ps_tx_buf[ac].lock, flags); |
766 | skb = skb_peek(&sta->ps_tx_buf[ac]); | |
57c4d7b4 | 767 | if (sta_info_buffer_expired(sta, skb)) |
948d887d | 768 | skb = __skb_dequeue(&sta->ps_tx_buf[ac]); |
836341a7 | 769 | else |
f0706e82 | 770 | skb = NULL; |
948d887d | 771 | spin_unlock_irqrestore(&sta->ps_tx_buf[ac].lock, flags); |
f0706e82 | 772 | |
60750397 JB |
773 | /* |
774 | * frames are queued in order, so if this one | |
775 | * hasn't expired yet (or we reached the end of | |
776 | * the queue) we can stop testing | |
777 | */ | |
836341a7 | 778 | if (!skb) |
f0706e82 | 779 | break; |
836341a7 | 780 | |
836341a7 | 781 | local->total_ps_buffered--; |
bdcbd8e0 JB |
782 | ps_dbg(sta->sdata, "Buffered frame expired (STA %pM)\n", |
783 | sta->sta.addr); | |
d4fa14cd | 784 | ieee80211_free_txskb(&local->hw, skb); |
f0706e82 | 785 | } |
3393a608 | 786 | |
60750397 JB |
787 | /* |
788 | * Finally, recalculate the TIM bit for this station -- it might | |
789 | * now be clear because the station was too slow to retrieve its | |
790 | * frames. | |
791 | */ | |
792 | sta_info_recalc_tim(sta); | |
793 | ||
794 | /* | |
795 | * Return whether there are any frames still buffered, this is | |
796 | * used to check whether the cleanup timer still needs to run, | |
797 | * if there are no frames we don't need to rearm the timer. | |
798 | */ | |
948d887d JB |
799 | return !(skb_queue_empty(&sta->ps_tx_buf[ac]) && |
800 | skb_queue_empty(&sta->tx_filtered[ac])); | |
801 | } | |
802 | ||
803 | static bool sta_info_cleanup_expire_buffered(struct ieee80211_local *local, | |
804 | struct sta_info *sta) | |
805 | { | |
806 | bool have_buffered = false; | |
807 | int ac; | |
808 | ||
3f52b7e3 MP |
809 | /* This is only necessary for stations on BSS/MBSS interfaces */ |
810 | if (!sta->sdata->bss && | |
811 | !ieee80211_vif_is_mesh(&sta->sdata->vif)) | |
948d887d JB |
812 | return false; |
813 | ||
814 | for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) | |
815 | have_buffered |= | |
816 | sta_info_cleanup_expire_buffered_ac(local, sta, ac); | |
817 | ||
818 | return have_buffered; | |
f0706e82 JB |
819 | } |
820 | ||
d778207b | 821 | static int __must_check __sta_info_destroy_part1(struct sta_info *sta) |
f0706e82 | 822 | { |
34e89507 JB |
823 | struct ieee80211_local *local; |
824 | struct ieee80211_sub_if_data *sdata; | |
6d10e46b | 825 | int ret; |
f0706e82 | 826 | |
34e89507 | 827 | might_sleep(); |
f0706e82 | 828 | |
34e89507 JB |
829 | if (!sta) |
830 | return -ENOENT; | |
5bb644a0 | 831 | |
34e89507 JB |
832 | local = sta->local; |
833 | sdata = sta->sdata; | |
f0706e82 | 834 | |
83d5cc01 JB |
835 | lockdep_assert_held(&local->sta_mtx); |
836 | ||
098a6070 JB |
837 | /* |
838 | * Before removing the station from the driver and | |
839 | * rate control, it might still start new aggregation | |
840 | * sessions -- block that to make sure the tear-down | |
841 | * will be sufficient. | |
842 | */ | |
c2c98fde | 843 | set_sta_flag(sta, WLAN_STA_BLOCK_BA); |
c82c4a80 | 844 | ieee80211_sta_tear_down_BA_sessions(sta, AGG_STOP_DESTROY_STA); |
098a6070 | 845 | |
34e89507 | 846 | ret = sta_info_hash_del(local, sta); |
b01711be | 847 | if (WARN_ON(ret)) |
34e89507 JB |
848 | return ret; |
849 | ||
794454ce | 850 | list_del_rcu(&sta->list); |
4d33960b | 851 | |
6a9d1b91 JB |
852 | drv_sta_pre_rcu_remove(local, sta->sdata, sta); |
853 | ||
a710c816 JB |
854 | if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN && |
855 | rcu_access_pointer(sdata->u.vlan.sta) == sta) | |
856 | RCU_INIT_POINTER(sdata->u.vlan.sta, NULL); | |
857 | ||
d778207b JB |
858 | return 0; |
859 | } | |
860 | ||
861 | static void __sta_info_destroy_part2(struct sta_info *sta) | |
862 | { | |
863 | struct ieee80211_local *local = sta->local; | |
864 | struct ieee80211_sub_if_data *sdata = sta->sdata; | |
865 | int ret; | |
866 | ||
867 | /* | |
868 | * NOTE: This assumes at least synchronize_net() was done | |
869 | * after _part1 and before _part2! | |
870 | */ | |
871 | ||
872 | might_sleep(); | |
873 | lockdep_assert_held(&local->sta_mtx); | |
874 | ||
c8782078 | 875 | /* now keys can no longer be reached */ |
6d10e46b | 876 | ieee80211_free_sta_keys(local, sta); |
34e89507 JB |
877 | |
878 | sta->dead = true; | |
879 | ||
34e89507 JB |
880 | local->num_sta--; |
881 | local->sta_generation++; | |
882 | ||
83d5cc01 | 883 | while (sta->sta_state > IEEE80211_STA_NONE) { |
f09603a2 JB |
884 | ret = sta_info_move_state(sta, sta->sta_state - 1); |
885 | if (ret) { | |
83d5cc01 JB |
886 | WARN_ON_ONCE(1); |
887 | break; | |
888 | } | |
889 | } | |
d9a7ddb0 | 890 | |
f09603a2 | 891 | if (sta->uploaded) { |
f09603a2 JB |
892 | ret = drv_sta_state(local, sdata, sta, IEEE80211_STA_NONE, |
893 | IEEE80211_STA_NOTEXIST); | |
894 | WARN_ON_ONCE(ret != 0); | |
895 | } | |
34e89507 | 896 | |
bdcbd8e0 JB |
897 | sta_dbg(sdata, "Removed STA %pM\n", sta->sta.addr); |
898 | ||
ec15e68b JM |
899 | cfg80211_del_sta(sdata->dev, sta->sta.addr, GFP_KERNEL); |
900 | ||
34e89507 JB |
901 | rate_control_remove_sta_debugfs(sta); |
902 | ieee80211_sta_debugfs_remove(sta); | |
21f659bf | 903 | ieee80211_recalc_min_chandef(sdata); |
34e89507 | 904 | |
d34ba216 | 905 | cleanup_single_sta(sta); |
d778207b JB |
906 | } |
907 | ||
908 | int __must_check __sta_info_destroy(struct sta_info *sta) | |
909 | { | |
910 | int err = __sta_info_destroy_part1(sta); | |
911 | ||
912 | if (err) | |
913 | return err; | |
914 | ||
915 | synchronize_net(); | |
916 | ||
917 | __sta_info_destroy_part2(sta); | |
34e89507 JB |
918 | |
919 | return 0; | |
4d6141c3 JS |
920 | } |
921 | ||
34e89507 | 922 | int sta_info_destroy_addr(struct ieee80211_sub_if_data *sdata, const u8 *addr) |
4d6141c3 | 923 | { |
34e89507 JB |
924 | struct sta_info *sta; |
925 | int ret; | |
4d6141c3 | 926 | |
34e89507 | 927 | mutex_lock(&sdata->local->sta_mtx); |
7852e361 | 928 | sta = sta_info_get(sdata, addr); |
34e89507 JB |
929 | ret = __sta_info_destroy(sta); |
930 | mutex_unlock(&sdata->local->sta_mtx); | |
4d6141c3 JS |
931 | |
932 | return ret; | |
933 | } | |
934 | ||
34e89507 JB |
935 | int sta_info_destroy_addr_bss(struct ieee80211_sub_if_data *sdata, |
936 | const u8 *addr) | |
e9f207f0 | 937 | { |
34e89507 JB |
938 | struct sta_info *sta; |
939 | int ret; | |
e9f207f0 | 940 | |
34e89507 | 941 | mutex_lock(&sdata->local->sta_mtx); |
7852e361 | 942 | sta = sta_info_get_bss(sdata, addr); |
34e89507 JB |
943 | ret = __sta_info_destroy(sta); |
944 | mutex_unlock(&sdata->local->sta_mtx); | |
d0709a65 | 945 | |
34e89507 JB |
946 | return ret; |
947 | } | |
e9f207f0 | 948 | |
34e89507 JB |
949 | static void sta_info_cleanup(unsigned long data) |
950 | { | |
951 | struct ieee80211_local *local = (struct ieee80211_local *) data; | |
952 | struct sta_info *sta; | |
3393a608 | 953 | bool timer_needed = false; |
34e89507 JB |
954 | |
955 | rcu_read_lock(); | |
956 | list_for_each_entry_rcu(sta, &local->sta_list, list) | |
3393a608 JO |
957 | if (sta_info_cleanup_expire_buffered(local, sta)) |
958 | timer_needed = true; | |
34e89507 | 959 | rcu_read_unlock(); |
e9f207f0 | 960 | |
34e89507 JB |
961 | if (local->quiescing) |
962 | return; | |
d0709a65 | 963 | |
3393a608 JO |
964 | if (!timer_needed) |
965 | return; | |
966 | ||
26d59535 JB |
967 | mod_timer(&local->sta_cleanup, |
968 | round_jiffies(jiffies + STA_INFO_CLEANUP_INTERVAL)); | |
e9f207f0 | 969 | } |
e9f207f0 | 970 | |
f0706e82 JB |
971 | void sta_info_init(struct ieee80211_local *local) |
972 | { | |
4d33960b | 973 | spin_lock_init(&local->tim_lock); |
34e89507 | 974 | mutex_init(&local->sta_mtx); |
f0706e82 | 975 | INIT_LIST_HEAD(&local->sta_list); |
f0706e82 | 976 | |
b24b8a24 PE |
977 | setup_timer(&local->sta_cleanup, sta_info_cleanup, |
978 | (unsigned long)local); | |
f0706e82 JB |
979 | } |
980 | ||
981 | void sta_info_stop(struct ieee80211_local *local) | |
982 | { | |
a56f992c | 983 | del_timer_sync(&local->sta_cleanup); |
f0706e82 JB |
984 | } |
985 | ||
051007d9 | 986 | |
e716251d | 987 | int __sta_info_flush(struct ieee80211_sub_if_data *sdata, bool vlans) |
f0706e82 | 988 | { |
b998e8bb | 989 | struct ieee80211_local *local = sdata->local; |
f0706e82 | 990 | struct sta_info *sta, *tmp; |
d778207b | 991 | LIST_HEAD(free_list); |
44213b5e | 992 | int ret = 0; |
f0706e82 | 993 | |
d0709a65 | 994 | might_sleep(); |
be8755e1 | 995 | |
e716251d JB |
996 | WARN_ON(vlans && sdata->vif.type != NL80211_IFTYPE_AP); |
997 | WARN_ON(vlans && !sdata->bss); | |
998 | ||
34e89507 | 999 | mutex_lock(&local->sta_mtx); |
d0709a65 | 1000 | list_for_each_entry_safe(sta, tmp, &local->sta_list, list) { |
e716251d JB |
1001 | if (sdata == sta->sdata || |
1002 | (vlans && sdata->bss == sta->sdata->bss)) { | |
d778207b JB |
1003 | if (!WARN_ON(__sta_info_destroy_part1(sta))) |
1004 | list_add(&sta->free_list, &free_list); | |
34316837 JB |
1005 | ret++; |
1006 | } | |
be8755e1 | 1007 | } |
d778207b JB |
1008 | |
1009 | if (!list_empty(&free_list)) { | |
1010 | synchronize_net(); | |
1011 | list_for_each_entry_safe(sta, tmp, &free_list, free_list) | |
1012 | __sta_info_destroy_part2(sta); | |
1013 | } | |
34e89507 | 1014 | mutex_unlock(&local->sta_mtx); |
44213b5e | 1015 | |
051007d9 JB |
1016 | return ret; |
1017 | } | |
1018 | ||
24723d1b JB |
1019 | void ieee80211_sta_expire(struct ieee80211_sub_if_data *sdata, |
1020 | unsigned long exp_time) | |
1021 | { | |
1022 | struct ieee80211_local *local = sdata->local; | |
1023 | struct sta_info *sta, *tmp; | |
24723d1b | 1024 | |
34e89507 | 1025 | mutex_lock(&local->sta_mtx); |
e46a2cf9 MSS |
1026 | |
1027 | list_for_each_entry_safe(sta, tmp, &local->sta_list, list) { | |
ec2b774e ML |
1028 | if (sdata != sta->sdata) |
1029 | continue; | |
1030 | ||
24723d1b | 1031 | if (time_after(jiffies, sta->last_rx + exp_time)) { |
eea57d42 MSS |
1032 | sta_dbg(sta->sdata, "expiring inactive STA %pM\n", |
1033 | sta->sta.addr); | |
3f52b7e3 MP |
1034 | |
1035 | if (ieee80211_vif_is_mesh(&sdata->vif) && | |
1036 | test_sta_flag(sta, WLAN_STA_PS_STA)) | |
1037 | atomic_dec(&sdata->u.mesh.ps.num_sta_ps); | |
1038 | ||
34e89507 | 1039 | WARN_ON(__sta_info_destroy(sta)); |
24723d1b | 1040 | } |
e46a2cf9 MSS |
1041 | } |
1042 | ||
34e89507 | 1043 | mutex_unlock(&local->sta_mtx); |
24723d1b | 1044 | } |
17741cdc | 1045 | |
686b9cb9 BG |
1046 | struct ieee80211_sta *ieee80211_find_sta_by_ifaddr(struct ieee80211_hw *hw, |
1047 | const u8 *addr, | |
1048 | const u8 *localaddr) | |
17741cdc | 1049 | { |
abe60632 | 1050 | struct sta_info *sta, *nxt; |
17741cdc | 1051 | |
686b9cb9 BG |
1052 | /* |
1053 | * Just return a random station if localaddr is NULL | |
1054 | * ... first in list. | |
1055 | */ | |
f7c65594 | 1056 | for_each_sta_info(hw_to_local(hw), addr, sta, nxt) { |
686b9cb9 | 1057 | if (localaddr && |
b203ca39 | 1058 | !ether_addr_equal(sta->sdata->vif.addr, localaddr)) |
686b9cb9 | 1059 | continue; |
f7c65594 JB |
1060 | if (!sta->uploaded) |
1061 | return NULL; | |
abe60632 | 1062 | return &sta->sta; |
f7c65594 JB |
1063 | } |
1064 | ||
abe60632 | 1065 | return NULL; |
17741cdc | 1066 | } |
686b9cb9 | 1067 | EXPORT_SYMBOL_GPL(ieee80211_find_sta_by_ifaddr); |
5ed176e1 JB |
1068 | |
1069 | struct ieee80211_sta *ieee80211_find_sta(struct ieee80211_vif *vif, | |
1070 | const u8 *addr) | |
1071 | { | |
f7c65594 | 1072 | struct sta_info *sta; |
5ed176e1 JB |
1073 | |
1074 | if (!vif) | |
1075 | return NULL; | |
1076 | ||
f7c65594 JB |
1077 | sta = sta_info_get_bss(vif_to_sdata(vif), addr); |
1078 | if (!sta) | |
1079 | return NULL; | |
1080 | ||
1081 | if (!sta->uploaded) | |
1082 | return NULL; | |
5ed176e1 | 1083 | |
f7c65594 | 1084 | return &sta->sta; |
5ed176e1 | 1085 | } |
17741cdc | 1086 | EXPORT_SYMBOL(ieee80211_find_sta); |
af818581 | 1087 | |
e3685e03 JB |
1088 | /* powersave support code */ |
1089 | void ieee80211_sta_ps_deliver_wakeup(struct sta_info *sta) | |
50a9432d | 1090 | { |
608383bf | 1091 | struct ieee80211_sub_if_data *sdata = sta->sdata; |
e3685e03 JB |
1092 | struct ieee80211_local *local = sdata->local; |
1093 | struct sk_buff_head pending; | |
1094 | int filtered = 0, buffered = 0, ac; | |
1095 | unsigned long flags; | |
d012a605 MP |
1096 | struct ps_data *ps; |
1097 | ||
3918edb0 FF |
1098 | if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) |
1099 | sdata = container_of(sdata->bss, struct ieee80211_sub_if_data, | |
1100 | u.ap); | |
1101 | ||
1102 | if (sdata->vif.type == NL80211_IFTYPE_AP) | |
d012a605 | 1103 | ps = &sdata->bss->ps; |
3f52b7e3 MP |
1104 | else if (ieee80211_vif_is_mesh(&sdata->vif)) |
1105 | ps = &sdata->u.mesh.ps; | |
d012a605 MP |
1106 | else |
1107 | return; | |
50a9432d | 1108 | |
c2c98fde | 1109 | clear_sta_flag(sta, WLAN_STA_SP); |
47086fc5 | 1110 | |
5a306f58 | 1111 | BUILD_BUG_ON(BITS_TO_LONGS(IEEE80211_NUM_TIDS) > 1); |
948d887d | 1112 | sta->driver_buffered_tids = 0; |
af818581 | 1113 | |
d057e5a3 AN |
1114 | if (!(local->hw.flags & IEEE80211_HW_AP_LINK_PS)) |
1115 | drv_sta_notify(local, sdata, STA_NOTIFY_AWAKE, &sta->sta); | |
af818581 | 1116 | |
948d887d | 1117 | skb_queue_head_init(&pending); |
af818581 | 1118 | |
1d147bfa EG |
1119 | /* sync with ieee80211_tx_h_unicast_ps_buf */ |
1120 | spin_lock(&sta->ps_lock); | |
af818581 | 1121 | /* Send all buffered frames to the station */ |
948d887d JB |
1122 | for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) { |
1123 | int count = skb_queue_len(&pending), tmp; | |
1124 | ||
987c285c | 1125 | spin_lock_irqsave(&sta->tx_filtered[ac].lock, flags); |
948d887d | 1126 | skb_queue_splice_tail_init(&sta->tx_filtered[ac], &pending); |
987c285c | 1127 | spin_unlock_irqrestore(&sta->tx_filtered[ac].lock, flags); |
948d887d JB |
1128 | tmp = skb_queue_len(&pending); |
1129 | filtered += tmp - count; | |
1130 | count = tmp; | |
1131 | ||
987c285c | 1132 | spin_lock_irqsave(&sta->ps_tx_buf[ac].lock, flags); |
948d887d | 1133 | skb_queue_splice_tail_init(&sta->ps_tx_buf[ac], &pending); |
987c285c | 1134 | spin_unlock_irqrestore(&sta->ps_tx_buf[ac].lock, flags); |
948d887d JB |
1135 | tmp = skb_queue_len(&pending); |
1136 | buffered += tmp - count; | |
1137 | } | |
1138 | ||
e3685e03 | 1139 | ieee80211_add_pending_skbs(local, &pending); |
5ac2e350 JB |
1140 | |
1141 | /* now we're no longer in the deliver code */ | |
1142 | clear_sta_flag(sta, WLAN_STA_PS_DELIVER); | |
1143 | ||
1144 | /* The station might have polled and then woken up before we responded, | |
1145 | * so clear these flags now to avoid them sticking around. | |
1146 | */ | |
1147 | clear_sta_flag(sta, WLAN_STA_PSPOLL); | |
1148 | clear_sta_flag(sta, WLAN_STA_UAPSD); | |
1d147bfa | 1149 | spin_unlock(&sta->ps_lock); |
948d887d | 1150 | |
e3685e03 JB |
1151 | atomic_dec(&ps->num_sta_ps); |
1152 | ||
687da132 | 1153 | /* This station just woke up and isn't aware of our SMPS state */ |
062f1d6d CYY |
1154 | if (!ieee80211_vif_is_mesh(&sdata->vif) && |
1155 | !ieee80211_smps_is_restrictive(sta->known_smps_mode, | |
687da132 EG |
1156 | sdata->smps_mode) && |
1157 | sta->known_smps_mode != sdata->bss->req_smps && | |
1158 | sta_info_tx_streams(sta) != 1) { | |
1159 | ht_dbg(sdata, | |
1160 | "%pM just woke up and MIMO capable - update SMPS\n", | |
1161 | sta->sta.addr); | |
1162 | ieee80211_send_smps_action(sdata, sdata->bss->req_smps, | |
1163 | sta->sta.addr, | |
1164 | sdata->vif.bss_conf.bssid); | |
1165 | } | |
1166 | ||
af818581 JB |
1167 | local->total_ps_buffered -= buffered; |
1168 | ||
c868cb35 JB |
1169 | sta_info_recalc_tim(sta); |
1170 | ||
bdcbd8e0 JB |
1171 | ps_dbg(sdata, |
1172 | "STA %pM aid %d sending %d filtered/%d PS frames since STA not sleeping anymore\n", | |
1173 | sta->sta.addr, sta->sta.aid, filtered, buffered); | |
af818581 JB |
1174 | } |
1175 | ||
ce662b44 JB |
1176 | static void ieee80211_send_null_response(struct ieee80211_sub_if_data *sdata, |
1177 | struct sta_info *sta, int tid, | |
b77cf4f8 JB |
1178 | enum ieee80211_frame_release_type reason, |
1179 | bool call_driver) | |
af818581 | 1180 | { |
af818581 | 1181 | struct ieee80211_local *local = sdata->local; |
ce662b44 | 1182 | struct ieee80211_qos_hdr *nullfunc; |
af818581 | 1183 | struct sk_buff *skb; |
ce662b44 JB |
1184 | int size = sizeof(*nullfunc); |
1185 | __le16 fc; | |
a74a8c84 | 1186 | bool qos = sta->sta.wme; |
ce662b44 | 1187 | struct ieee80211_tx_info *info; |
55de908a | 1188 | struct ieee80211_chanctx_conf *chanctx_conf; |
af818581 | 1189 | |
ce662b44 JB |
1190 | if (qos) { |
1191 | fc = cpu_to_le16(IEEE80211_FTYPE_DATA | | |
1192 | IEEE80211_STYPE_QOS_NULLFUNC | | |
1193 | IEEE80211_FCTL_FROMDS); | |
1194 | } else { | |
1195 | size -= 2; | |
1196 | fc = cpu_to_le16(IEEE80211_FTYPE_DATA | | |
1197 | IEEE80211_STYPE_NULLFUNC | | |
1198 | IEEE80211_FCTL_FROMDS); | |
af818581 | 1199 | } |
af818581 | 1200 | |
ce662b44 JB |
1201 | skb = dev_alloc_skb(local->hw.extra_tx_headroom + size); |
1202 | if (!skb) | |
1203 | return; | |
1204 | ||
1205 | skb_reserve(skb, local->hw.extra_tx_headroom); | |
1206 | ||
1207 | nullfunc = (void *) skb_put(skb, size); | |
1208 | nullfunc->frame_control = fc; | |
1209 | nullfunc->duration_id = 0; | |
1210 | memcpy(nullfunc->addr1, sta->sta.addr, ETH_ALEN); | |
1211 | memcpy(nullfunc->addr2, sdata->vif.addr, ETH_ALEN); | |
1212 | memcpy(nullfunc->addr3, sdata->vif.addr, ETH_ALEN); | |
864a6040 | 1213 | nullfunc->seq_ctrl = 0; |
ce662b44 | 1214 | |
59b66255 JB |
1215 | skb->priority = tid; |
1216 | skb_set_queue_mapping(skb, ieee802_1d_to_ac[tid]); | |
ce662b44 | 1217 | if (qos) { |
ce662b44 JB |
1218 | nullfunc->qos_ctrl = cpu_to_le16(tid); |
1219 | ||
40b96408 | 1220 | if (reason == IEEE80211_FRAME_RELEASE_UAPSD) |
ce662b44 JB |
1221 | nullfunc->qos_ctrl |= |
1222 | cpu_to_le16(IEEE80211_QOS_CTL_EOSP); | |
1223 | } | |
1224 | ||
1225 | info = IEEE80211_SKB_CB(skb); | |
1226 | ||
1227 | /* | |
1228 | * Tell TX path to send this frame even though the | |
1229 | * STA may still remain is PS mode after this frame | |
deeaee19 JB |
1230 | * exchange. Also set EOSP to indicate this packet |
1231 | * ends the poll/service period. | |
ce662b44 | 1232 | */ |
02f2f1a9 | 1233 | info->flags |= IEEE80211_TX_CTL_NO_PS_BUFFER | |
d6d23de2 | 1234 | IEEE80211_TX_CTL_PS_RESPONSE | |
deeaee19 JB |
1235 | IEEE80211_TX_STATUS_EOSP | |
1236 | IEEE80211_TX_CTL_REQ_TX_STATUS; | |
ce662b44 | 1237 | |
b77cf4f8 JB |
1238 | if (call_driver) |
1239 | drv_allow_buffered_frames(local, sta, BIT(tid), 1, | |
1240 | reason, false); | |
40b96408 | 1241 | |
89afe614 JB |
1242 | skb->dev = sdata->dev; |
1243 | ||
55de908a JB |
1244 | rcu_read_lock(); |
1245 | chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf); | |
1246 | if (WARN_ON(!chanctx_conf)) { | |
1247 | rcu_read_unlock(); | |
1248 | kfree_skb(skb); | |
1249 | return; | |
1250 | } | |
1251 | ||
4bf88530 | 1252 | ieee80211_xmit(sdata, skb, chanctx_conf->def.chan->band); |
55de908a | 1253 | rcu_read_unlock(); |
ce662b44 JB |
1254 | } |
1255 | ||
0a1cb809 JB |
1256 | static int find_highest_prio_tid(unsigned long tids) |
1257 | { | |
1258 | /* lower 3 TIDs aren't ordered perfectly */ | |
1259 | if (tids & 0xF8) | |
1260 | return fls(tids) - 1; | |
1261 | /* TID 0 is BE just like TID 3 */ | |
1262 | if (tids & BIT(0)) | |
1263 | return 0; | |
1264 | return fls(tids) - 1; | |
1265 | } | |
1266 | ||
47086fc5 JB |
1267 | static void |
1268 | ieee80211_sta_ps_deliver_response(struct sta_info *sta, | |
1269 | int n_frames, u8 ignored_acs, | |
1270 | enum ieee80211_frame_release_type reason) | |
af818581 JB |
1271 | { |
1272 | struct ieee80211_sub_if_data *sdata = sta->sdata; | |
1273 | struct ieee80211_local *local = sdata->local; | |
948d887d JB |
1274 | bool more_data = false; |
1275 | int ac; | |
4049e09a | 1276 | unsigned long driver_release_tids = 0; |
47086fc5 | 1277 | struct sk_buff_head frames; |
af818581 | 1278 | |
deeaee19 | 1279 | /* Service or PS-Poll period starts */ |
c2c98fde | 1280 | set_sta_flag(sta, WLAN_STA_SP); |
deeaee19 | 1281 | |
47086fc5 | 1282 | __skb_queue_head_init(&frames); |
948d887d | 1283 | |
f9f760b4 | 1284 | /* Get response frame(s) and more data bit for the last one. */ |
948d887d | 1285 | for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) { |
4049e09a JB |
1286 | unsigned long tids; |
1287 | ||
47086fc5 | 1288 | if (ignored_acs & BIT(ac)) |
948d887d JB |
1289 | continue; |
1290 | ||
4049e09a JB |
1291 | tids = ieee80211_tids_for_ac(ac); |
1292 | ||
f9f760b4 JB |
1293 | /* if we already have frames from software, then we can't also |
1294 | * release from hardware queues | |
1295 | */ | |
1296 | if (skb_queue_empty(&frames)) | |
1297 | driver_release_tids |= sta->driver_buffered_tids & tids; | |
948d887d | 1298 | |
f9f760b4 JB |
1299 | if (driver_release_tids) { |
1300 | /* If the driver has data on more than one TID then | |
4049e09a | 1301 | * certainly there's more data if we release just a |
f9f760b4 JB |
1302 | * single frame now (from a single TID). This will |
1303 | * only happen for PS-Poll. | |
4049e09a | 1304 | */ |
47086fc5 JB |
1305 | if (reason == IEEE80211_FRAME_RELEASE_PSPOLL && |
1306 | hweight16(driver_release_tids) > 1) { | |
4049e09a JB |
1307 | more_data = true; |
1308 | driver_release_tids = | |
0a1cb809 JB |
1309 | BIT(find_highest_prio_tid( |
1310 | driver_release_tids)); | |
4049e09a JB |
1311 | break; |
1312 | } | |
f9f760b4 JB |
1313 | } else { |
1314 | struct sk_buff *skb; | |
1315 | ||
1316 | while (n_frames > 0) { | |
1317 | skb = skb_dequeue(&sta->tx_filtered[ac]); | |
1318 | if (!skb) { | |
1319 | skb = skb_dequeue( | |
1320 | &sta->ps_tx_buf[ac]); | |
1321 | if (skb) | |
1322 | local->total_ps_buffered--; | |
1323 | } | |
1324 | if (!skb) | |
1325 | break; | |
1326 | n_frames--; | |
1327 | __skb_queue_tail(&frames, skb); | |
1328 | } | |
4049e09a | 1329 | } |
948d887d | 1330 | |
f9f760b4 JB |
1331 | /* If we have more frames buffered on this AC, then set the |
1332 | * more-data bit and abort the loop since we can't send more | |
1333 | * data from other ACs before the buffered frames from this. | |
1334 | */ | |
948d887d JB |
1335 | if (!skb_queue_empty(&sta->tx_filtered[ac]) || |
1336 | !skb_queue_empty(&sta->ps_tx_buf[ac])) { | |
1337 | more_data = true; | |
1338 | break; | |
1339 | } | |
af818581 | 1340 | } |
af818581 | 1341 | |
f9f760b4 | 1342 | if (skb_queue_empty(&frames) && !driver_release_tids) { |
ce662b44 | 1343 | int tid; |
af818581 JB |
1344 | |
1345 | /* | |
ce662b44 JB |
1346 | * For PS-Poll, this can only happen due to a race condition |
1347 | * when we set the TIM bit and the station notices it, but | |
1348 | * before it can poll for the frame we expire it. | |
1349 | * | |
1350 | * For uAPSD, this is said in the standard (11.2.1.5 h): | |
1351 | * At each unscheduled SP for a non-AP STA, the AP shall | |
1352 | * attempt to transmit at least one MSDU or MMPDU, but no | |
1353 | * more than the value specified in the Max SP Length field | |
1354 | * in the QoS Capability element from delivery-enabled ACs, | |
1355 | * that are destined for the non-AP STA. | |
1356 | * | |
1357 | * Since we have no other MSDU/MMPDU, transmit a QoS null frame. | |
af818581 | 1358 | */ |
af818581 | 1359 | |
ce662b44 JB |
1360 | /* This will evaluate to 1, 3, 5 or 7. */ |
1361 | tid = 7 - ((ffs(~ignored_acs) - 1) << 1); | |
af818581 | 1362 | |
b77cf4f8 | 1363 | ieee80211_send_null_response(sdata, sta, tid, reason, true); |
f9f760b4 | 1364 | } else if (!driver_release_tids) { |
47086fc5 JB |
1365 | struct sk_buff_head pending; |
1366 | struct sk_buff *skb; | |
40b96408 JB |
1367 | int num = 0; |
1368 | u16 tids = 0; | |
b77cf4f8 | 1369 | bool need_null = false; |
af818581 | 1370 | |
47086fc5 | 1371 | skb_queue_head_init(&pending); |
af818581 | 1372 | |
47086fc5 JB |
1373 | while ((skb = __skb_dequeue(&frames))) { |
1374 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); | |
1375 | struct ieee80211_hdr *hdr = (void *) skb->data; | |
40b96408 JB |
1376 | u8 *qoshdr = NULL; |
1377 | ||
1378 | num++; | |
af818581 | 1379 | |
47086fc5 JB |
1380 | /* |
1381 | * Tell TX path to send this frame even though the | |
1382 | * STA may still remain is PS mode after this frame | |
1383 | * exchange. | |
1384 | */ | |
d6d23de2 FF |
1385 | info->flags |= IEEE80211_TX_CTL_NO_PS_BUFFER | |
1386 | IEEE80211_TX_CTL_PS_RESPONSE; | |
47086fc5 JB |
1387 | |
1388 | /* | |
1389 | * Use MoreData flag to indicate whether there are | |
1390 | * more buffered frames for this STA | |
1391 | */ | |
24b9c373 | 1392 | if (more_data || !skb_queue_empty(&frames)) |
47086fc5 JB |
1393 | hdr->frame_control |= |
1394 | cpu_to_le16(IEEE80211_FCTL_MOREDATA); | |
24b9c373 JD |
1395 | else |
1396 | hdr->frame_control &= | |
1397 | cpu_to_le16(~IEEE80211_FCTL_MOREDATA); | |
47086fc5 | 1398 | |
40b96408 JB |
1399 | if (ieee80211_is_data_qos(hdr->frame_control) || |
1400 | ieee80211_is_qos_nullfunc(hdr->frame_control)) | |
1401 | qoshdr = ieee80211_get_qos_ctl(hdr); | |
1402 | ||
b77cf4f8 | 1403 | tids |= BIT(skb->priority); |
52a3f20c | 1404 | |
b77cf4f8 JB |
1405 | __skb_queue_tail(&pending, skb); |
1406 | ||
1407 | /* end service period after last frame or add one */ | |
1408 | if (!skb_queue_empty(&frames)) | |
1409 | continue; | |
1410 | ||
1411 | if (reason != IEEE80211_FRAME_RELEASE_UAPSD) { | |
1412 | /* for PS-Poll, there's only one frame */ | |
52a3f20c MP |
1413 | info->flags |= IEEE80211_TX_STATUS_EOSP | |
1414 | IEEE80211_TX_CTL_REQ_TX_STATUS; | |
b77cf4f8 | 1415 | break; |
52a3f20c | 1416 | } |
deeaee19 | 1417 | |
b77cf4f8 JB |
1418 | /* For uAPSD, things are a bit more complicated. If the |
1419 | * last frame has a QoS header (i.e. is a QoS-data or | |
1420 | * QoS-nulldata frame) then just set the EOSP bit there | |
1421 | * and be done. | |
1422 | * If the frame doesn't have a QoS header (which means | |
1423 | * it should be a bufferable MMPDU) then we can't set | |
1424 | * the EOSP bit in the QoS header; add a QoS-nulldata | |
1425 | * frame to the list to send it after the MMPDU. | |
1426 | * | |
1427 | * Note that this code is only in the mac80211-release | |
1428 | * code path, we assume that the driver will not buffer | |
1429 | * anything but QoS-data frames, or if it does, will | |
1430 | * create the QoS-nulldata frame by itself if needed. | |
1431 | * | |
1432 | * Cf. 802.11-2012 10.2.1.10 (c). | |
1433 | */ | |
1434 | if (qoshdr) { | |
1435 | *qoshdr |= IEEE80211_QOS_CTL_EOSP; | |
40b96408 | 1436 | |
b77cf4f8 JB |
1437 | info->flags |= IEEE80211_TX_STATUS_EOSP | |
1438 | IEEE80211_TX_CTL_REQ_TX_STATUS; | |
1439 | } else { | |
1440 | /* The standard isn't completely clear on this | |
1441 | * as it says the more-data bit should be set | |
1442 | * if there are more BUs. The QoS-Null frame | |
1443 | * we're about to send isn't buffered yet, we | |
1444 | * only create it below, but let's pretend it | |
1445 | * was buffered just in case some clients only | |
1446 | * expect more-data=0 when eosp=1. | |
1447 | */ | |
1448 | hdr->frame_control |= | |
1449 | cpu_to_le16(IEEE80211_FCTL_MOREDATA); | |
1450 | need_null = true; | |
1451 | num++; | |
1452 | } | |
1453 | break; | |
47086fc5 | 1454 | } |
af818581 | 1455 | |
40b96408 JB |
1456 | drv_allow_buffered_frames(local, sta, tids, num, |
1457 | reason, more_data); | |
1458 | ||
47086fc5 | 1459 | ieee80211_add_pending_skbs(local, &pending); |
af818581 | 1460 | |
b77cf4f8 JB |
1461 | if (need_null) |
1462 | ieee80211_send_null_response( | |
1463 | sdata, sta, find_highest_prio_tid(tids), | |
1464 | reason, false); | |
1465 | ||
c868cb35 | 1466 | sta_info_recalc_tim(sta); |
af818581 JB |
1467 | } else { |
1468 | /* | |
4049e09a JB |
1469 | * We need to release a frame that is buffered somewhere in the |
1470 | * driver ... it'll have to handle that. | |
f9f760b4 JB |
1471 | * Note that the driver also has to check the number of frames |
1472 | * on the TIDs we're releasing from - if there are more than | |
1473 | * n_frames it has to set the more-data bit (if we didn't ask | |
1474 | * it to set it anyway due to other buffered frames); if there | |
1475 | * are fewer than n_frames it has to make sure to adjust that | |
1476 | * to allow the service period to end properly. | |
4049e09a JB |
1477 | */ |
1478 | drv_release_buffered_frames(local, sta, driver_release_tids, | |
47086fc5 | 1479 | n_frames, reason, more_data); |
4049e09a JB |
1480 | |
1481 | /* | |
1482 | * Note that we don't recalculate the TIM bit here as it would | |
1483 | * most likely have no effect at all unless the driver told us | |
f9f760b4 | 1484 | * that the TID(s) became empty before returning here from the |
4049e09a | 1485 | * release function. |
f9f760b4 | 1486 | * Either way, however, when the driver tells us that the TID(s) |
4049e09a | 1487 | * became empty we'll do the TIM recalculation. |
af818581 | 1488 | */ |
af818581 JB |
1489 | } |
1490 | } | |
1491 | ||
47086fc5 JB |
1492 | void ieee80211_sta_ps_deliver_poll_response(struct sta_info *sta) |
1493 | { | |
1494 | u8 ignore_for_response = sta->sta.uapsd_queues; | |
1495 | ||
1496 | /* | |
1497 | * If all ACs are delivery-enabled then we should reply | |
1498 | * from any of them, if only some are enabled we reply | |
1499 | * only from the non-enabled ones. | |
1500 | */ | |
1501 | if (ignore_for_response == BIT(IEEE80211_NUM_ACS) - 1) | |
1502 | ignore_for_response = 0; | |
1503 | ||
1504 | ieee80211_sta_ps_deliver_response(sta, 1, ignore_for_response, | |
1505 | IEEE80211_FRAME_RELEASE_PSPOLL); | |
1506 | } | |
1507 | ||
1508 | void ieee80211_sta_ps_deliver_uapsd(struct sta_info *sta) | |
1509 | { | |
1510 | int n_frames = sta->sta.max_sp; | |
1511 | u8 delivery_enabled = sta->sta.uapsd_queues; | |
1512 | ||
1513 | /* | |
1514 | * If we ever grow support for TSPEC this might happen if | |
1515 | * the TSPEC update from hostapd comes in between a trigger | |
1516 | * frame setting WLAN_STA_UAPSD in the RX path and this | |
1517 | * actually getting called. | |
1518 | */ | |
1519 | if (!delivery_enabled) | |
1520 | return; | |
1521 | ||
47086fc5 JB |
1522 | switch (sta->sta.max_sp) { |
1523 | case 1: | |
1524 | n_frames = 2; | |
1525 | break; | |
1526 | case 2: | |
1527 | n_frames = 4; | |
1528 | break; | |
1529 | case 3: | |
1530 | n_frames = 6; | |
1531 | break; | |
1532 | case 0: | |
1533 | /* XXX: what is a good value? */ | |
1534 | n_frames = 8; | |
1535 | break; | |
1536 | } | |
1537 | ||
1538 | ieee80211_sta_ps_deliver_response(sta, n_frames, ~delivery_enabled, | |
1539 | IEEE80211_FRAME_RELEASE_UAPSD); | |
1540 | } | |
1541 | ||
af818581 JB |
1542 | void ieee80211_sta_block_awake(struct ieee80211_hw *hw, |
1543 | struct ieee80211_sta *pubsta, bool block) | |
1544 | { | |
1545 | struct sta_info *sta = container_of(pubsta, struct sta_info, sta); | |
1546 | ||
b5878a2d JB |
1547 | trace_api_sta_block_awake(sta->local, pubsta, block); |
1548 | ||
5ac2e350 | 1549 | if (block) { |
c2c98fde | 1550 | set_sta_flag(sta, WLAN_STA_PS_DRIVER); |
5ac2e350 JB |
1551 | return; |
1552 | } | |
1553 | ||
1554 | if (!test_sta_flag(sta, WLAN_STA_PS_DRIVER)) | |
1555 | return; | |
1556 | ||
1557 | if (!test_sta_flag(sta, WLAN_STA_PS_STA)) { | |
1558 | set_sta_flag(sta, WLAN_STA_PS_DELIVER); | |
1559 | clear_sta_flag(sta, WLAN_STA_PS_DRIVER); | |
1560 | ieee80211_queue_work(hw, &sta->drv_deliver_wk); | |
1561 | } else if (test_sta_flag(sta, WLAN_STA_PSPOLL) || | |
1562 | test_sta_flag(sta, WLAN_STA_UAPSD)) { | |
1563 | /* must be asleep in this case */ | |
1564 | clear_sta_flag(sta, WLAN_STA_PS_DRIVER); | |
1565 | ieee80211_queue_work(hw, &sta->drv_deliver_wk); | |
1566 | } else { | |
1567 | clear_sta_flag(sta, WLAN_STA_PS_DRIVER); | |
1568 | } | |
af818581 JB |
1569 | } |
1570 | EXPORT_SYMBOL(ieee80211_sta_block_awake); | |
dcf55fb5 | 1571 | |
e943789e | 1572 | void ieee80211_sta_eosp(struct ieee80211_sta *pubsta) |
37fbd908 JB |
1573 | { |
1574 | struct sta_info *sta = container_of(pubsta, struct sta_info, sta); | |
1575 | struct ieee80211_local *local = sta->local; | |
37fbd908 JB |
1576 | |
1577 | trace_api_eosp(local, pubsta); | |
1578 | ||
e943789e | 1579 | clear_sta_flag(sta, WLAN_STA_SP); |
37fbd908 | 1580 | } |
e943789e | 1581 | EXPORT_SYMBOL(ieee80211_sta_eosp); |
37fbd908 | 1582 | |
042ec453 JB |
1583 | void ieee80211_sta_set_buffered(struct ieee80211_sta *pubsta, |
1584 | u8 tid, bool buffered) | |
dcf55fb5 FF |
1585 | { |
1586 | struct sta_info *sta = container_of(pubsta, struct sta_info, sta); | |
1587 | ||
5a306f58 | 1588 | if (WARN_ON(tid >= IEEE80211_NUM_TIDS)) |
042ec453 JB |
1589 | return; |
1590 | ||
1b000789 JB |
1591 | trace_api_sta_set_buffered(sta->local, pubsta, tid, buffered); |
1592 | ||
948d887d JB |
1593 | if (buffered) |
1594 | set_bit(tid, &sta->driver_buffered_tids); | |
1595 | else | |
1596 | clear_bit(tid, &sta->driver_buffered_tids); | |
1597 | ||
c868cb35 | 1598 | sta_info_recalc_tim(sta); |
dcf55fb5 | 1599 | } |
042ec453 | 1600 | EXPORT_SYMBOL(ieee80211_sta_set_buffered); |
d9a7ddb0 | 1601 | |
83d5cc01 JB |
1602 | int sta_info_move_state(struct sta_info *sta, |
1603 | enum ieee80211_sta_state new_state) | |
d9a7ddb0 | 1604 | { |
8bf11d8d | 1605 | might_sleep(); |
d9a7ddb0 JB |
1606 | |
1607 | if (sta->sta_state == new_state) | |
1608 | return 0; | |
1609 | ||
f09603a2 JB |
1610 | /* check allowed transitions first */ |
1611 | ||
1612 | switch (new_state) { | |
1613 | case IEEE80211_STA_NONE: | |
1614 | if (sta->sta_state != IEEE80211_STA_AUTH) | |
1615 | return -EINVAL; | |
1616 | break; | |
1617 | case IEEE80211_STA_AUTH: | |
1618 | if (sta->sta_state != IEEE80211_STA_NONE && | |
1619 | sta->sta_state != IEEE80211_STA_ASSOC) | |
1620 | return -EINVAL; | |
1621 | break; | |
1622 | case IEEE80211_STA_ASSOC: | |
1623 | if (sta->sta_state != IEEE80211_STA_AUTH && | |
1624 | sta->sta_state != IEEE80211_STA_AUTHORIZED) | |
1625 | return -EINVAL; | |
1626 | break; | |
1627 | case IEEE80211_STA_AUTHORIZED: | |
1628 | if (sta->sta_state != IEEE80211_STA_ASSOC) | |
1629 | return -EINVAL; | |
1630 | break; | |
1631 | default: | |
1632 | WARN(1, "invalid state %d", new_state); | |
1633 | return -EINVAL; | |
1634 | } | |
1635 | ||
bdcbd8e0 JB |
1636 | sta_dbg(sta->sdata, "moving STA %pM to state %d\n", |
1637 | sta->sta.addr, new_state); | |
f09603a2 JB |
1638 | |
1639 | /* | |
1640 | * notify the driver before the actual changes so it can | |
1641 | * fail the transition | |
1642 | */ | |
1643 | if (test_sta_flag(sta, WLAN_STA_INSERTED)) { | |
1644 | int err = drv_sta_state(sta->local, sta->sdata, sta, | |
1645 | sta->sta_state, new_state); | |
1646 | if (err) | |
1647 | return err; | |
1648 | } | |
1649 | ||
1650 | /* reflect the change in all state variables */ | |
1651 | ||
d9a7ddb0 JB |
1652 | switch (new_state) { |
1653 | case IEEE80211_STA_NONE: | |
1654 | if (sta->sta_state == IEEE80211_STA_AUTH) | |
1655 | clear_bit(WLAN_STA_AUTH, &sta->_flags); | |
d9a7ddb0 JB |
1656 | break; |
1657 | case IEEE80211_STA_AUTH: | |
1658 | if (sta->sta_state == IEEE80211_STA_NONE) | |
1659 | set_bit(WLAN_STA_AUTH, &sta->_flags); | |
1660 | else if (sta->sta_state == IEEE80211_STA_ASSOC) | |
1661 | clear_bit(WLAN_STA_ASSOC, &sta->_flags); | |
d9a7ddb0 JB |
1662 | break; |
1663 | case IEEE80211_STA_ASSOC: | |
29623892 | 1664 | if (sta->sta_state == IEEE80211_STA_AUTH) { |
d9a7ddb0 | 1665 | set_bit(WLAN_STA_ASSOC, &sta->_flags); |
29623892 | 1666 | } else if (sta->sta_state == IEEE80211_STA_AUTHORIZED) { |
7e3ed02c FF |
1667 | if (sta->sdata->vif.type == NL80211_IFTYPE_AP || |
1668 | (sta->sdata->vif.type == NL80211_IFTYPE_AP_VLAN && | |
1669 | !sta->sdata->u.vlan.sta)) | |
1670 | atomic_dec(&sta->sdata->bss->num_mcast_sta); | |
d9a7ddb0 | 1671 | clear_bit(WLAN_STA_AUTHORIZED, &sta->_flags); |
f09603a2 | 1672 | } |
d9a7ddb0 JB |
1673 | break; |
1674 | case IEEE80211_STA_AUTHORIZED: | |
29623892 | 1675 | if (sta->sta_state == IEEE80211_STA_ASSOC) { |
7e3ed02c FF |
1676 | if (sta->sdata->vif.type == NL80211_IFTYPE_AP || |
1677 | (sta->sdata->vif.type == NL80211_IFTYPE_AP_VLAN && | |
1678 | !sta->sdata->u.vlan.sta)) | |
1679 | atomic_inc(&sta->sdata->bss->num_mcast_sta); | |
d9a7ddb0 | 1680 | set_bit(WLAN_STA_AUTHORIZED, &sta->_flags); |
f09603a2 | 1681 | } |
d9a7ddb0 JB |
1682 | break; |
1683 | default: | |
f09603a2 | 1684 | break; |
d9a7ddb0 JB |
1685 | } |
1686 | ||
d9a7ddb0 JB |
1687 | sta->sta_state = new_state; |
1688 | ||
1689 | return 0; | |
1690 | } | |
687da132 EG |
1691 | |
1692 | u8 sta_info_tx_streams(struct sta_info *sta) | |
1693 | { | |
1694 | struct ieee80211_sta_ht_cap *ht_cap = &sta->sta.ht_cap; | |
1695 | u8 rx_streams; | |
1696 | ||
1697 | if (!sta->sta.ht_cap.ht_supported) | |
1698 | return 1; | |
1699 | ||
1700 | if (sta->sta.vht_cap.vht_supported) { | |
1701 | int i; | |
1702 | u16 tx_mcs_map = | |
1703 | le16_to_cpu(sta->sta.vht_cap.vht_mcs.tx_mcs_map); | |
1704 | ||
1705 | for (i = 7; i >= 0; i--) | |
1706 | if ((tx_mcs_map & (0x3 << (i * 2))) != | |
1707 | IEEE80211_VHT_MCS_NOT_SUPPORTED) | |
1708 | return i + 1; | |
1709 | } | |
1710 | ||
1711 | if (ht_cap->mcs.rx_mask[3]) | |
1712 | rx_streams = 4; | |
1713 | else if (ht_cap->mcs.rx_mask[2]) | |
1714 | rx_streams = 3; | |
1715 | else if (ht_cap->mcs.rx_mask[1]) | |
1716 | rx_streams = 2; | |
1717 | else | |
1718 | rx_streams = 1; | |
1719 | ||
1720 | if (!(ht_cap->mcs.tx_params & IEEE80211_HT_MCS_TX_RX_DIFF)) | |
1721 | return rx_streams; | |
1722 | ||
1723 | return ((ht_cap->mcs.tx_params & IEEE80211_HT_MCS_TX_MAX_STREAMS_MASK) | |
1724 | >> IEEE80211_HT_MCS_TX_MAX_STREAMS_SHIFT) + 1; | |
1725 | } | |
b7ffbd7e JB |
1726 | |
1727 | void sta_set_sinfo(struct sta_info *sta, struct station_info *sinfo) | |
1728 | { | |
1729 | struct ieee80211_sub_if_data *sdata = sta->sdata; | |
1730 | struct ieee80211_local *local = sdata->local; | |
9a244409 | 1731 | struct rate_control_ref *ref = NULL; |
b7ffbd7e JB |
1732 | struct timespec uptime; |
1733 | u64 packets = 0; | |
1734 | u32 thr = 0; | |
1735 | int i, ac; | |
1736 | ||
9a244409 JL |
1737 | if (test_sta_flag(sta, WLAN_STA_RATE_CONTROL)) |
1738 | ref = local->rate_ctrl; | |
1739 | ||
b7ffbd7e JB |
1740 | sinfo->generation = sdata->local->sta_generation; |
1741 | ||
1742 | sinfo->filled = STATION_INFO_INACTIVE_TIME | | |
1743 | STATION_INFO_RX_BYTES64 | | |
1744 | STATION_INFO_TX_BYTES64 | | |
1745 | STATION_INFO_RX_PACKETS | | |
1746 | STATION_INFO_TX_PACKETS | | |
1747 | STATION_INFO_TX_RETRIES | | |
1748 | STATION_INFO_TX_FAILED | | |
1749 | STATION_INFO_TX_BITRATE | | |
1750 | STATION_INFO_RX_BITRATE | | |
1751 | STATION_INFO_RX_DROP_MISC | | |
1752 | STATION_INFO_BSS_PARAM | | |
1753 | STATION_INFO_CONNECTED_TIME | | |
1754 | STATION_INFO_STA_FLAGS | | |
1755 | STATION_INFO_BEACON_LOSS_COUNT; | |
1756 | ||
18171520 | 1757 | ktime_get_ts(&uptime); |
b7ffbd7e JB |
1758 | sinfo->connected_time = uptime.tv_sec - sta->last_connected; |
1759 | ||
1760 | sinfo->inactive_time = jiffies_to_msecs(jiffies - sta->last_rx); | |
1761 | sinfo->tx_bytes = 0; | |
1762 | for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) { | |
1763 | sinfo->tx_bytes += sta->tx_bytes[ac]; | |
1764 | packets += sta->tx_packets[ac]; | |
1765 | } | |
1766 | sinfo->tx_packets = packets; | |
1767 | sinfo->rx_bytes = sta->rx_bytes; | |
1768 | sinfo->rx_packets = sta->rx_packets; | |
1769 | sinfo->tx_retries = sta->tx_retry_count; | |
1770 | sinfo->tx_failed = sta->tx_retry_failed; | |
1771 | sinfo->rx_dropped_misc = sta->rx_dropped; | |
1772 | sinfo->beacon_loss_count = sta->beacon_loss_count; | |
1773 | ||
1774 | if ((sta->local->hw.flags & IEEE80211_HW_SIGNAL_DBM) || | |
1775 | (sta->local->hw.flags & IEEE80211_HW_SIGNAL_UNSPEC)) { | |
1776 | sinfo->filled |= STATION_INFO_SIGNAL | STATION_INFO_SIGNAL_AVG; | |
1777 | if (!local->ops->get_rssi || | |
1778 | drv_get_rssi(local, sdata, &sta->sta, &sinfo->signal)) | |
1779 | sinfo->signal = (s8)sta->last_signal; | |
1780 | sinfo->signal_avg = (s8) -ewma_read(&sta->avg_signal); | |
1781 | } | |
1782 | if (sta->chains) { | |
1783 | sinfo->filled |= STATION_INFO_CHAIN_SIGNAL | | |
1784 | STATION_INFO_CHAIN_SIGNAL_AVG; | |
1785 | ||
1786 | sinfo->chains = sta->chains; | |
1787 | for (i = 0; i < ARRAY_SIZE(sinfo->chain_signal); i++) { | |
1788 | sinfo->chain_signal[i] = sta->chain_signal_last[i]; | |
1789 | sinfo->chain_signal_avg[i] = | |
1790 | (s8) -ewma_read(&sta->chain_signal_avg[i]); | |
1791 | } | |
1792 | } | |
1793 | ||
1794 | sta_set_rate_info_tx(sta, &sta->last_tx_rate, &sinfo->txrate); | |
1795 | sta_set_rate_info_rx(sta, &sinfo->rxrate); | |
1796 | ||
1797 | if (ieee80211_vif_is_mesh(&sdata->vif)) { | |
1798 | #ifdef CONFIG_MAC80211_MESH | |
1799 | sinfo->filled |= STATION_INFO_LLID | | |
1800 | STATION_INFO_PLID | | |
1801 | STATION_INFO_PLINK_STATE | | |
1802 | STATION_INFO_LOCAL_PM | | |
1803 | STATION_INFO_PEER_PM | | |
1804 | STATION_INFO_NONPEER_PM; | |
1805 | ||
1806 | sinfo->llid = sta->llid; | |
1807 | sinfo->plid = sta->plid; | |
1808 | sinfo->plink_state = sta->plink_state; | |
1809 | if (test_sta_flag(sta, WLAN_STA_TOFFSET_KNOWN)) { | |
1810 | sinfo->filled |= STATION_INFO_T_OFFSET; | |
1811 | sinfo->t_offset = sta->t_offset; | |
1812 | } | |
1813 | sinfo->local_pm = sta->local_pm; | |
1814 | sinfo->peer_pm = sta->peer_pm; | |
1815 | sinfo->nonpeer_pm = sta->nonpeer_pm; | |
1816 | #endif | |
1817 | } | |
1818 | ||
1819 | sinfo->bss_param.flags = 0; | |
1820 | if (sdata->vif.bss_conf.use_cts_prot) | |
1821 | sinfo->bss_param.flags |= BSS_PARAM_FLAGS_CTS_PROT; | |
1822 | if (sdata->vif.bss_conf.use_short_preamble) | |
1823 | sinfo->bss_param.flags |= BSS_PARAM_FLAGS_SHORT_PREAMBLE; | |
1824 | if (sdata->vif.bss_conf.use_short_slot) | |
1825 | sinfo->bss_param.flags |= BSS_PARAM_FLAGS_SHORT_SLOT_TIME; | |
785e21a8 | 1826 | sinfo->bss_param.dtim_period = sdata->vif.bss_conf.dtim_period; |
b7ffbd7e JB |
1827 | sinfo->bss_param.beacon_interval = sdata->vif.bss_conf.beacon_int; |
1828 | ||
1829 | sinfo->sta_flags.set = 0; | |
1830 | sinfo->sta_flags.mask = BIT(NL80211_STA_FLAG_AUTHORIZED) | | |
1831 | BIT(NL80211_STA_FLAG_SHORT_PREAMBLE) | | |
1832 | BIT(NL80211_STA_FLAG_WME) | | |
1833 | BIT(NL80211_STA_FLAG_MFP) | | |
1834 | BIT(NL80211_STA_FLAG_AUTHENTICATED) | | |
1835 | BIT(NL80211_STA_FLAG_ASSOCIATED) | | |
1836 | BIT(NL80211_STA_FLAG_TDLS_PEER); | |
1837 | if (test_sta_flag(sta, WLAN_STA_AUTHORIZED)) | |
1838 | sinfo->sta_flags.set |= BIT(NL80211_STA_FLAG_AUTHORIZED); | |
1839 | if (test_sta_flag(sta, WLAN_STA_SHORT_PREAMBLE)) | |
1840 | sinfo->sta_flags.set |= BIT(NL80211_STA_FLAG_SHORT_PREAMBLE); | |
a74a8c84 | 1841 | if (sta->sta.wme) |
b7ffbd7e JB |
1842 | sinfo->sta_flags.set |= BIT(NL80211_STA_FLAG_WME); |
1843 | if (test_sta_flag(sta, WLAN_STA_MFP)) | |
1844 | sinfo->sta_flags.set |= BIT(NL80211_STA_FLAG_MFP); | |
1845 | if (test_sta_flag(sta, WLAN_STA_AUTH)) | |
1846 | sinfo->sta_flags.set |= BIT(NL80211_STA_FLAG_AUTHENTICATED); | |
1847 | if (test_sta_flag(sta, WLAN_STA_ASSOC)) | |
1848 | sinfo->sta_flags.set |= BIT(NL80211_STA_FLAG_ASSOCIATED); | |
1849 | if (test_sta_flag(sta, WLAN_STA_TDLS_PEER)) | |
1850 | sinfo->sta_flags.set |= BIT(NL80211_STA_FLAG_TDLS_PEER); | |
1851 | ||
1852 | /* check if the driver has a SW RC implementation */ | |
1853 | if (ref && ref->ops->get_expected_throughput) | |
1854 | thr = ref->ops->get_expected_throughput(sta->rate_ctrl_priv); | |
1855 | else | |
1856 | thr = drv_get_expected_throughput(local, &sta->sta); | |
1857 | ||
1858 | if (thr != 0) { | |
1859 | sinfo->filled |= STATION_INFO_EXPECTED_THROUGHPUT; | |
1860 | sinfo->expected_throughput = thr; | |
1861 | } | |
1862 | } |