Commit | Line | Data |
---|---|---|
f0706e82 JB |
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> | |
888d04df | 12 | #include <linux/etherdevice.h> |
f0706e82 JB |
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> | |
0d174406 | 18 | #include <linux/timer.h> |
d0709a65 | 19 | #include <linux/rtnetlink.h> |
f0706e82 JB |
20 | |
21 | #include <net/mac80211.h> | |
22 | #include "ieee80211_i.h" | |
24487981 | 23 | #include "driver-ops.h" |
2c8dccc7 | 24 | #include "rate.h" |
f0706e82 | 25 | #include "sta_info.h" |
e9f207f0 | 26 | #include "debugfs_sta.h" |
ee385855 | 27 | #include "mesh.h" |
ce662b44 | 28 | #include "wme.h" |
f0706e82 | 29 | |
d0709a65 JB |
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 | * | |
34e89507 JB |
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. | |
93e5deb1 JB |
45 | * |
46 | * When the insertion fails (sta_info_insert()) returns non-zero), the | |
47 | * structure will have been freed by sta_info_insert()! | |
d0709a65 | 48 | * |
34e89507 | 49 | * Station entries are added by mac80211 when you establish a link with a |
7e189a12 LR |
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 | |
25985edc | 52 | * receive an association response from the AP. For IBSS this occurs when |
34e89507 | 53 | * get to know about a peer on the same IBSS. For WDS we add the sta for |
25985edc | 54 | * the peer immediately upon device open. When using AP mode we add stations |
34e89507 | 55 | * for each respective station upon request from userspace through nl80211. |
7e189a12 | 56 | * |
34e89507 JB |
57 | * In order to remove a STA info structure, various sta_info_destroy_*() |
58 | * calls are available. | |
d0709a65 | 59 | * |
34e89507 JB |
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. | |
d0709a65 | 64 | */ |
f0706e82 | 65 | |
4d33960b | 66 | /* Caller must hold local->sta_mtx */ |
be8755e1 MW |
67 | static int sta_info_hash_del(struct ieee80211_local *local, |
68 | struct sta_info *sta) | |
f0706e82 JB |
69 | { |
70 | struct sta_info *s; | |
71 | ||
40b275b6 | 72 | s = rcu_dereference_protected(local->sta_hash[STA_HASH(sta->sta.addr)], |
4d33960b | 73 | lockdep_is_held(&local->sta_mtx)); |
f0706e82 | 74 | if (!s) |
be8755e1 MW |
75 | return -ENOENT; |
76 | if (s == sta) { | |
cf778b00 | 77 | rcu_assign_pointer(local->sta_hash[STA_HASH(sta->sta.addr)], |
d0709a65 | 78 | s->hnext); |
be8755e1 | 79 | return 0; |
f0706e82 JB |
80 | } |
81 | ||
40b275b6 JB |
82 | while (rcu_access_pointer(s->hnext) && |
83 | rcu_access_pointer(s->hnext) != sta) | |
84 | s = rcu_dereference_protected(s->hnext, | |
4d33960b | 85 | lockdep_is_held(&local->sta_mtx)); |
40b275b6 | 86 | if (rcu_access_pointer(s->hnext)) { |
cf778b00 | 87 | rcu_assign_pointer(s->hnext, sta->hnext); |
be8755e1 MW |
88 | return 0; |
89 | } | |
f0706e82 | 90 | |
be8755e1 | 91 | return -ENOENT; |
f0706e82 JB |
92 | } |
93 | ||
5108ca82 | 94 | static void __cleanup_single_sta(struct sta_info *sta) |
b22cfcfc | 95 | { |
b22cfcfc EP |
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; | |
d012a605 | 100 | struct ps_data *ps; |
b22cfcfc | 101 | |
e3685e03 | 102 | if (test_sta_flag(sta, WLAN_STA_PS_STA) || |
5ac2e350 JB |
103 | test_sta_flag(sta, WLAN_STA_PS_DRIVER) || |
104 | test_sta_flag(sta, WLAN_STA_PS_DELIVER)) { | |
d012a605 MP |
105 | if (sta->sdata->vif.type == NL80211_IFTYPE_AP || |
106 | sta->sdata->vif.type == NL80211_IFTYPE_AP_VLAN) | |
107 | ps = &sdata->bss->ps; | |
3f52b7e3 MP |
108 | else if (ieee80211_vif_is_mesh(&sdata->vif)) |
109 | ps = &sdata->u.mesh.ps; | |
d012a605 MP |
110 | else |
111 | return; | |
b22cfcfc EP |
112 | |
113 | clear_sta_flag(sta, WLAN_STA_PS_STA); | |
e3685e03 | 114 | clear_sta_flag(sta, WLAN_STA_PS_DRIVER); |
5ac2e350 | 115 | clear_sta_flag(sta, WLAN_STA_PS_DELIVER); |
b22cfcfc | 116 | |
d012a605 | 117 | atomic_dec(&ps->num_sta_ps); |
b22cfcfc EP |
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]); | |
1f98ab7f FF |
123 | ieee80211_purge_tx_queue(&local->hw, &sta->ps_tx_buf[ac]); |
124 | ieee80211_purge_tx_queue(&local->hw, &sta->tx_filtered[ac]); | |
b22cfcfc EP |
125 | } |
126 | ||
45b5028e TP |
127 | if (ieee80211_vif_is_mesh(&sdata->vif)) |
128 | mesh_sta_cleanup(sta); | |
b22cfcfc | 129 | |
5ac2e350 | 130 | cancel_work_sync(&sta->drv_deliver_wk); |
b22cfcfc EP |
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 | */ | |
5a306f58 | 138 | for (i = 0; i < IEEE80211_NUM_TIDS; i++) { |
661eb381 | 139 | kfree(sta->ampdu_mlme.tid_start_tx[i]); |
b22cfcfc EP |
140 | tid_tx = rcu_dereference_raw(sta->ampdu_mlme.tid_tx[i]); |
141 | if (!tid_tx) | |
142 | continue; | |
1f98ab7f | 143 | ieee80211_purge_tx_queue(&local->hw, &tid_tx->pending); |
b22cfcfc EP |
144 | kfree(tid_tx); |
145 | } | |
5108ca82 | 146 | } |
b22cfcfc | 147 | |
5108ca82 JB |
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); | |
b22cfcfc EP |
154 | sta_info_free(local, sta); |
155 | } | |
156 | ||
d0709a65 | 157 | /* protected by RCU */ |
abe60632 JB |
158 | struct sta_info *sta_info_get(struct ieee80211_sub_if_data *sdata, |
159 | const u8 *addr) | |
f0706e82 | 160 | { |
abe60632 | 161 | struct ieee80211_local *local = sdata->local; |
f0706e82 JB |
162 | struct sta_info *sta; |
163 | ||
0379185b | 164 | sta = rcu_dereference_check(local->sta_hash[STA_HASH(addr)], |
0379185b | 165 | lockdep_is_held(&local->sta_mtx)); |
f0706e82 | 166 | while (sta) { |
abe60632 | 167 | if (sta->sdata == sdata && |
b203ca39 | 168 | ether_addr_equal(sta->sta.addr, addr)) |
f0706e82 | 169 | break; |
0379185b | 170 | sta = rcu_dereference_check(sta->hnext, |
0379185b | 171 | lockdep_is_held(&local->sta_mtx)); |
f0706e82 | 172 | } |
43ba7e95 JB |
173 | return sta; |
174 | } | |
175 | ||
0e5ded5a FF |
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 | ||
0379185b | 186 | sta = rcu_dereference_check(local->sta_hash[STA_HASH(addr)], |
0379185b | 187 | lockdep_is_held(&local->sta_mtx)); |
0e5ded5a FF |
188 | while (sta) { |
189 | if ((sta->sdata == sdata || | |
a2c1e3da | 190 | (sta->sdata->bss && sta->sdata->bss == sdata->bss)) && |
b203ca39 | 191 | ether_addr_equal(sta->sta.addr, addr)) |
0e5ded5a | 192 | break; |
0379185b | 193 | sta = rcu_dereference_check(sta->hnext, |
0379185b | 194 | lockdep_is_held(&local->sta_mtx)); |
0e5ded5a FF |
195 | } |
196 | return sta; | |
197 | } | |
198 | ||
3b53fde8 JB |
199 | struct sta_info *sta_info_get_by_idx(struct ieee80211_sub_if_data *sdata, |
200 | int idx) | |
ee385855 | 201 | { |
3b53fde8 | 202 | struct ieee80211_local *local = sdata->local; |
ee385855 LCC |
203 | struct sta_info *sta; |
204 | int i = 0; | |
205 | ||
d0709a65 | 206 | list_for_each_entry_rcu(sta, &local->sta_list, list) { |
3b53fde8 | 207 | if (sdata != sta->sdata) |
2a8ca29a | 208 | continue; |
ee385855 LCC |
209 | if (i < idx) { |
210 | ++i; | |
211 | continue; | |
ee385855 | 212 | } |
2a8ca29a | 213 | return sta; |
ee385855 | 214 | } |
ee385855 LCC |
215 | |
216 | return NULL; | |
217 | } | |
f0706e82 | 218 | |
93e5deb1 | 219 | /** |
d9a7ddb0 | 220 | * sta_info_free - free STA |
93e5deb1 | 221 | * |
6ef307bc | 222 | * @local: pointer to the global information |
93e5deb1 JB |
223 | * @sta: STA info to free |
224 | * | |
225 | * This function must undo everything done by sta_info_alloc() | |
d9a7ddb0 JB |
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.) | |
93e5deb1 | 229 | */ |
d9a7ddb0 | 230 | void sta_info_free(struct ieee80211_local *local, struct sta_info *sta) |
93e5deb1 | 231 | { |
ad38bfc9 MG |
232 | int i; |
233 | ||
889cbb91 | 234 | if (sta->rate_ctrl) |
af65cd96 | 235 | rate_control_free_sta(sta); |
93e5deb1 | 236 | |
ad38bfc9 MG |
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 | ||
bdcbd8e0 | 243 | sta_dbg(sta->sdata, "Destroyed STA %pM\n", sta->sta.addr); |
93e5deb1 | 244 | |
53d04525 | 245 | kfree(rcu_dereference_raw(sta->sta.rates)); |
93e5deb1 JB |
246 | kfree(sta); |
247 | } | |
248 | ||
4d33960b | 249 | /* Caller must hold local->sta_mtx */ |
d0709a65 JB |
250 | static void sta_info_hash_add(struct ieee80211_local *local, |
251 | struct sta_info *sta) | |
f0706e82 | 252 | { |
4d33960b | 253 | lockdep_assert_held(&local->sta_mtx); |
17741cdc | 254 | sta->hnext = local->sta_hash[STA_HASH(sta->sta.addr)]; |
cf778b00 | 255 | rcu_assign_pointer(local->sta_hash[STA_HASH(sta->sta.addr)], sta); |
f0706e82 | 256 | } |
f0706e82 | 257 | |
5ac2e350 | 258 | static void sta_deliver_ps_frames(struct work_struct *wk) |
af818581 JB |
259 | { |
260 | struct sta_info *sta; | |
261 | ||
5ac2e350 | 262 | sta = container_of(wk, struct sta_info, drv_deliver_wk); |
af818581 JB |
263 | |
264 | if (sta->dead) | |
265 | return; | |
266 | ||
5ac2e350 JB |
267 | local_bh_disable(); |
268 | if (!test_sta_flag(sta, WLAN_STA_PS_STA)) | |
af818581 | 269 | ieee80211_sta_ps_deliver_wakeup(sta); |
5ac2e350 | 270 | else if (test_and_clear_sta_flag(sta, WLAN_STA_PSPOLL)) |
af818581 | 271 | ieee80211_sta_ps_deliver_poll_response(sta); |
5ac2e350 | 272 | else if (test_and_clear_sta_flag(sta, WLAN_STA_UAPSD)) |
47086fc5 | 273 | ieee80211_sta_ps_deliver_uapsd(sta); |
5ac2e350 | 274 | local_bh_enable(); |
af818581 JB |
275 | } |
276 | ||
af65cd96 JB |
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 | ||
889cbb91 | 283 | sta->rate_ctrl = local->rate_ctrl; |
af65cd96 JB |
284 | sta->rate_ctrl_priv = rate_control_alloc_sta(sta->rate_ctrl, |
285 | &sta->sta, gfp); | |
889cbb91 | 286 | if (!sta->rate_ctrl_priv) |
af65cd96 | 287 | return -ENOMEM; |
af65cd96 JB |
288 | |
289 | return 0; | |
290 | } | |
291 | ||
73651ee6 | 292 | struct sta_info *sta_info_alloc(struct ieee80211_sub_if_data *sdata, |
56544160 | 293 | const u8 *addr, gfp_t gfp) |
f0706e82 | 294 | { |
d0709a65 | 295 | struct ieee80211_local *local = sdata->local; |
f0706e82 | 296 | struct sta_info *sta; |
ebe27c91 | 297 | struct timespec uptime; |
ad38bfc9 | 298 | struct ieee80211_tx_latency_bin_ranges *tx_latency; |
16c5f15c | 299 | int i; |
f0706e82 | 300 | |
17741cdc | 301 | sta = kzalloc(sizeof(*sta) + local->hw.sta_data_size, gfp); |
f0706e82 | 302 | if (!sta) |
73651ee6 | 303 | return NULL; |
f0706e82 | 304 | |
ef04a297 JB |
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 | ||
07346f81 | 334 | spin_lock_init(&sta->lock); |
1d147bfa | 335 | spin_lock_init(&sta->ps_lock); |
5ac2e350 | 336 | INIT_WORK(&sta->drv_deliver_wk, sta_deliver_ps_frames); |
67c282c0 | 337 | INIT_WORK(&sta->ampdu_mlme.work, ieee80211_ba_session_work); |
a93e3644 | 338 | mutex_init(&sta->ampdu_mlme.mtx); |
87f59c70 TP |
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); | |
6c7c4cbf | 343 | sta->nonpeer_pm = NL80211_MESH_POWER_ACTIVE; |
87f59c70 | 344 | #endif |
07346f81 | 345 | |
17741cdc | 346 | memcpy(sta->sta.addr, addr, ETH_ALEN); |
d0709a65 JB |
347 | sta->local = local; |
348 | sta->sdata = sdata; | |
8bc8aecd | 349 | sta->last_rx = jiffies; |
f0706e82 | 350 | |
71ec375c JB |
351 | sta->sta_state = IEEE80211_STA_NONE; |
352 | ||
18171520 | 353 | ktime_get_ts(&uptime); |
ebe27c91 | 354 | sta->last_connected = uptime.tv_sec; |
541a45a1 | 355 | ewma_init(&sta->avg_signal, 1024, 8); |
ef0621e8 FF |
356 | for (i = 0; i < ARRAY_SIZE(sta->chain_signal_avg); i++) |
357 | ewma_init(&sta->chain_signal_avg[i], 1024, 8); | |
541a45a1 | 358 | |
ef04a297 JB |
359 | if (sta_prepare_rate_control(local, sta, gfp)) |
360 | goto free; | |
f0706e82 | 361 | |
5a306f58 | 362 | for (i = 0; i < IEEE80211_NUM_TIDS; i++) { |
a622ab72 JB |
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 | */ | |
16c5f15c | 368 | sta->timer_to_tid[i] = i; |
16c5f15c | 369 | } |
948d887d JB |
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 | } | |
73651ee6 | 374 | |
5a306f58 | 375 | for (i = 0; i < IEEE80211_NUM_TIDS; i++) |
4be929be | 376 | sta->last_seq_ctrl[i] = cpu_to_le16(USHRT_MAX); |
cccaec98 | 377 | |
af0ed69b | 378 | sta->sta.smps_mode = IEEE80211_SMPS_OFF; |
687da132 EG |
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 | } | |
af0ed69b | 403 | |
bdcbd8e0 | 404 | sta_dbg(sdata, "Allocated STA %pM\n", sta->sta.addr); |
73651ee6 | 405 | return sta; |
ef04a297 JB |
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; | |
73651ee6 JB |
415 | } |
416 | ||
8c71df7a | 417 | static int sta_info_insert_check(struct sta_info *sta) |
34e89507 | 418 | { |
34e89507 | 419 | struct ieee80211_sub_if_data *sdata = sta->sdata; |
34e89507 | 420 | |
03e4497e JB |
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 | */ | |
8c71df7a GE |
426 | if (unlikely(!ieee80211_sdata_running(sdata))) |
427 | return -ENETDOWN; | |
03e4497e | 428 | |
b203ca39 | 429 | if (WARN_ON(ether_addr_equal(sta->sta.addr, sdata->vif.addr) || |
8c71df7a GE |
430 | is_multicast_ether_addr(sta->sta.addr))) |
431 | return -EINVAL; | |
432 | ||
433 | return 0; | |
434 | } | |
435 | ||
f09603a2 JB |
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) { | |
a4ec45a4 JB |
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; | |
f09603a2 JB |
456 | return 0; |
457 | } | |
458 | ||
459 | if (sdata->vif.type == NL80211_IFTYPE_ADHOC) { | |
bdcbd8e0 JB |
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); | |
f09603a2 JB |
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 | ||
8c71df7a GE |
473 | /* |
474 | * should be called with sta_mtx locked | |
475 | * this function replaces the mutex lock | |
476 | * with a RCU lock | |
477 | */ | |
4d33960b | 478 | static int sta_info_insert_finish(struct sta_info *sta) __acquires(RCU) |
8c71df7a GE |
479 | { |
480 | struct ieee80211_local *local = sta->local; | |
481 | struct ieee80211_sub_if_data *sdata = sta->sdata; | |
7852e361 | 482 | struct station_info sinfo; |
8c71df7a GE |
483 | int err = 0; |
484 | ||
485 | lockdep_assert_held(&local->sta_mtx); | |
34e89507 | 486 | |
7852e361 JB |
487 | /* check if STA exists already */ |
488 | if (sta_info_get_bss(sdata, sta->sta.addr)) { | |
489 | err = -EEXIST; | |
490 | goto out_err; | |
4d33960b | 491 | } |
32bfd35d | 492 | |
7852e361 JB |
493 | local->num_sta++; |
494 | local->sta_generation++; | |
495 | smp_mb(); | |
4d33960b | 496 | |
5108ca82 JB |
497 | /* simplify things and don't accept BA sessions yet */ |
498 | set_sta_flag(sta, WLAN_STA_BLOCK_BA); | |
499 | ||
7852e361 JB |
500 | /* make the station visible */ |
501 | sta_info_hash_add(local, sta); | |
83d5cc01 | 502 | |
794454ce | 503 | list_add_rcu(&sta->list, &local->sta_list); |
4d33960b | 504 | |
5108ca82 JB |
505 | /* notify driver */ |
506 | err = sta_info_insert_drv_state(local, sdata, sta); | |
507 | if (err) | |
508 | goto out_remove; | |
509 | ||
7852e361 | 510 | set_sta_flag(sta, WLAN_STA_INSERTED); |
5108ca82 JB |
511 | /* accept BA sessions now */ |
512 | clear_sta_flag(sta, WLAN_STA_BLOCK_BA); | |
4d33960b | 513 | |
21f659bf | 514 | ieee80211_recalc_min_chandef(sdata); |
7852e361 JB |
515 | ieee80211_sta_debugfs_add(sta); |
516 | rate_control_add_sta_debugfs(sta); | |
4d33960b | 517 | |
7852e361 JB |
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); | |
d0709a65 | 522 | |
bdcbd8e0 | 523 | sta_dbg(sdata, "Inserted STA %pM\n", sta->sta.addr); |
f0706e82 | 524 | |
34e89507 JB |
525 | /* move reference to rcu-protected */ |
526 | rcu_read_lock(); | |
527 | mutex_unlock(&local->sta_mtx); | |
e9f207f0 | 528 | |
73651ee6 JB |
529 | if (ieee80211_vif_is_mesh(&sdata->vif)) |
530 | mesh_accept_plinks_update(sdata); | |
531 | ||
8c71df7a | 532 | return 0; |
5108ca82 JB |
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); | |
4d33960b JB |
539 | out_err: |
540 | mutex_unlock(&local->sta_mtx); | |
541 | rcu_read_lock(); | |
542 | return err; | |
8c71df7a GE |
543 | } |
544 | ||
545 | int sta_info_insert_rcu(struct sta_info *sta) __acquires(RCU) | |
546 | { | |
547 | struct ieee80211_local *local = sta->local; | |
308f7fcf | 548 | int err; |
8c71df7a | 549 | |
4d33960b JB |
550 | might_sleep(); |
551 | ||
8c71df7a GE |
552 | err = sta_info_insert_check(sta); |
553 | if (err) { | |
554 | rcu_read_lock(); | |
555 | goto out_free; | |
556 | } | |
557 | ||
8c71df7a GE |
558 | mutex_lock(&local->sta_mtx); |
559 | ||
4d33960b | 560 | err = sta_info_insert_finish(sta); |
8c71df7a GE |
561 | if (err) |
562 | goto out_free; | |
563 | ||
73651ee6 | 564 | return 0; |
93e5deb1 | 565 | out_free: |
d9a7ddb0 | 566 | sta_info_free(local, sta); |
93e5deb1 | 567 | return err; |
f0706e82 JB |
568 | } |
569 | ||
34e89507 JB |
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 | ||
d012a605 | 579 | static inline void __bss_tim_set(u8 *tim, u16 id) |
004c872e JB |
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 | */ | |
d012a605 | 585 | tim[id / 8] |= (1 << (id % 8)); |
004c872e JB |
586 | } |
587 | ||
d012a605 | 588 | static inline void __bss_tim_clear(u8 *tim, u16 id) |
004c872e JB |
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 | */ | |
d012a605 | 594 | tim[id / 8] &= ~(1 << (id % 8)); |
004c872e JB |
595 | } |
596 | ||
3d5839b6 IP |
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 | ||
948d887d | 606 | static unsigned long ieee80211_tids_for_ac(int ac) |
004c872e | 607 | { |
948d887d JB |
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; | |
d0709a65 | 621 | } |
004c872e JB |
622 | } |
623 | ||
c868cb35 | 624 | void sta_info_recalc_tim(struct sta_info *sta) |
004c872e | 625 | { |
c868cb35 | 626 | struct ieee80211_local *local = sta->local; |
d012a605 | 627 | struct ps_data *ps; |
948d887d JB |
628 | bool indicate_tim = false; |
629 | u8 ignore_for_tim = sta->sta.uapsd_queues; | |
630 | int ac; | |
d012a605 MP |
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; | |
004c872e | 637 | |
d012a605 MP |
638 | ps = &sta->sdata->bss->ps; |
639 | id = sta->sta.aid; | |
3f52b7e3 MP |
640 | #ifdef CONFIG_MAC80211_MESH |
641 | } else if (ieee80211_vif_is_mesh(&sta->sdata->vif)) { | |
642 | ps = &sta->sdata->u.mesh.ps; | |
204d1304 | 643 | /* TIM map only for 1 <= PLID <= IEEE80211_MAX_AID */ |
6f101ef0 | 644 | id = sta->plid % (IEEE80211_MAX_AID + 1); |
3f52b7e3 | 645 | #endif |
d012a605 | 646 | } else { |
c868cb35 | 647 | return; |
d012a605 | 648 | } |
3e122be0 | 649 | |
c868cb35 JB |
650 | /* No need to do anything if the driver does all */ |
651 | if (local->hw.flags & IEEE80211_HW_AP_LINK_PS) | |
652 | return; | |
004c872e | 653 | |
c868cb35 JB |
654 | if (sta->dead) |
655 | goto done; | |
3e122be0 | 656 | |
948d887d JB |
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; | |
3e122be0 | 668 | |
948d887d JB |
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; | |
3e122be0 | 676 | |
948d887d JB |
677 | tids = ieee80211_tids_for_ac(ac); |
678 | ||
679 | indicate_tim |= | |
680 | sta->driver_buffered_tids & tids; | |
d0709a65 | 681 | } |
004c872e | 682 | |
c868cb35 | 683 | done: |
65f704a5 | 684 | spin_lock_bh(&local->tim_lock); |
004c872e | 685 | |
3d5839b6 IP |
686 | if (indicate_tim == __bss_tim_get(ps->tim, id)) |
687 | goto out_unlock; | |
688 | ||
948d887d | 689 | if (indicate_tim) |
d012a605 | 690 | __bss_tim_set(ps->tim, id); |
c868cb35 | 691 | else |
d012a605 | 692 | __bss_tim_clear(ps->tim, id); |
004c872e | 693 | |
c868cb35 JB |
694 | if (local->ops->set_tim) { |
695 | local->tim_in_locked_section = true; | |
948d887d | 696 | drv_set_tim(local, &sta->sta, indicate_tim); |
c868cb35 JB |
697 | local->tim_in_locked_section = false; |
698 | } | |
3e122be0 | 699 | |
3d5839b6 | 700 | out_unlock: |
65f704a5 | 701 | spin_unlock_bh(&local->tim_lock); |
004c872e JB |
702 | } |
703 | ||
cd0b8d89 | 704 | static bool sta_info_buffer_expired(struct sta_info *sta, struct sk_buff *skb) |
f0706e82 | 705 | { |
e039fa4a | 706 | struct ieee80211_tx_info *info; |
f0706e82 JB |
707 | int timeout; |
708 | ||
709 | if (!skb) | |
cd0b8d89 | 710 | return false; |
f0706e82 | 711 | |
e039fa4a | 712 | info = IEEE80211_SKB_CB(skb); |
f0706e82 JB |
713 | |
714 | /* Timeout: (2 * listen_interval * beacon_int * 1024 / 1000000) sec */ | |
57c4d7b4 JB |
715 | timeout = (sta->listen_interval * |
716 | sta->sdata->vif.bss_conf.beacon_int * | |
717 | 32 / 15625) * HZ; | |
f0706e82 JB |
718 | if (timeout < STA_TX_BUFFER_EXPIRE) |
719 | timeout = STA_TX_BUFFER_EXPIRE; | |
e039fa4a | 720 | return time_after(jiffies, info->control.jiffies + timeout); |
f0706e82 JB |
721 | } |
722 | ||
723 | ||
948d887d JB |
724 | static bool sta_info_cleanup_expire_buffered_ac(struct ieee80211_local *local, |
725 | struct sta_info *sta, int ac) | |
f0706e82 JB |
726 | { |
727 | unsigned long flags; | |
728 | struct sk_buff *skb; | |
729 | ||
60750397 JB |
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 (;;) { | |
948d887d JB |
738 | spin_lock_irqsave(&sta->tx_filtered[ac].lock, flags); |
739 | skb = skb_peek(&sta->tx_filtered[ac]); | |
60750397 | 740 | if (sta_info_buffer_expired(sta, skb)) |
948d887d | 741 | skb = __skb_dequeue(&sta->tx_filtered[ac]); |
60750397 JB |
742 | else |
743 | skb = NULL; | |
948d887d | 744 | spin_unlock_irqrestore(&sta->tx_filtered[ac].lock, flags); |
60750397 JB |
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; | |
d4fa14cd | 754 | ieee80211_free_txskb(&local->hw, skb); |
60750397 JB |
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 | */ | |
f0706e82 | 763 | for (;;) { |
948d887d JB |
764 | spin_lock_irqsave(&sta->ps_tx_buf[ac].lock, flags); |
765 | skb = skb_peek(&sta->ps_tx_buf[ac]); | |
57c4d7b4 | 766 | if (sta_info_buffer_expired(sta, skb)) |
948d887d | 767 | skb = __skb_dequeue(&sta->ps_tx_buf[ac]); |
836341a7 | 768 | else |
f0706e82 | 769 | skb = NULL; |
948d887d | 770 | spin_unlock_irqrestore(&sta->ps_tx_buf[ac].lock, flags); |
f0706e82 | 771 | |
60750397 JB |
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 | */ | |
836341a7 | 777 | if (!skb) |
f0706e82 | 778 | break; |
836341a7 | 779 | |
836341a7 | 780 | local->total_ps_buffered--; |
bdcbd8e0 JB |
781 | ps_dbg(sta->sdata, "Buffered frame expired (STA %pM)\n", |
782 | sta->sta.addr); | |
d4fa14cd | 783 | ieee80211_free_txskb(&local->hw, skb); |
f0706e82 | 784 | } |
3393a608 | 785 | |
60750397 JB |
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 | */ | |
948d887d JB |
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 | ||
3f52b7e3 MP |
808 | /* This is only necessary for stations on BSS/MBSS interfaces */ |
809 | if (!sta->sdata->bss && | |
810 | !ieee80211_vif_is_mesh(&sta->sdata->vif)) | |
948d887d JB |
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; | |
f0706e82 JB |
818 | } |
819 | ||
d778207b | 820 | static int __must_check __sta_info_destroy_part1(struct sta_info *sta) |
f0706e82 | 821 | { |
34e89507 JB |
822 | struct ieee80211_local *local; |
823 | struct ieee80211_sub_if_data *sdata; | |
6d10e46b | 824 | int ret; |
f0706e82 | 825 | |
34e89507 | 826 | might_sleep(); |
f0706e82 | 827 | |
34e89507 JB |
828 | if (!sta) |
829 | return -ENOENT; | |
5bb644a0 | 830 | |
34e89507 JB |
831 | local = sta->local; |
832 | sdata = sta->sdata; | |
f0706e82 | 833 | |
83d5cc01 JB |
834 | lockdep_assert_held(&local->sta_mtx); |
835 | ||
098a6070 JB |
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 | */ | |
c2c98fde | 842 | set_sta_flag(sta, WLAN_STA_BLOCK_BA); |
c82c4a80 | 843 | ieee80211_sta_tear_down_BA_sessions(sta, AGG_STOP_DESTROY_STA); |
098a6070 | 844 | |
34e89507 | 845 | ret = sta_info_hash_del(local, sta); |
b01711be | 846 | if (WARN_ON(ret)) |
34e89507 JB |
847 | return ret; |
848 | ||
794454ce | 849 | list_del_rcu(&sta->list); |
4d33960b | 850 | |
6a9d1b91 JB |
851 | drv_sta_pre_rcu_remove(local, sta->sdata, sta); |
852 | ||
a710c816 JB |
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 | ||
d778207b JB |
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 | ||
c8782078 | 874 | /* now keys can no longer be reached */ |
6d10e46b | 875 | ieee80211_free_sta_keys(local, sta); |
34e89507 JB |
876 | |
877 | sta->dead = true; | |
878 | ||
34e89507 JB |
879 | local->num_sta--; |
880 | local->sta_generation++; | |
881 | ||
83d5cc01 | 882 | while (sta->sta_state > IEEE80211_STA_NONE) { |
f09603a2 JB |
883 | ret = sta_info_move_state(sta, sta->sta_state - 1); |
884 | if (ret) { | |
83d5cc01 JB |
885 | WARN_ON_ONCE(1); |
886 | break; | |
887 | } | |
888 | } | |
d9a7ddb0 | 889 | |
f09603a2 | 890 | if (sta->uploaded) { |
f09603a2 JB |
891 | ret = drv_sta_state(local, sdata, sta, IEEE80211_STA_NONE, |
892 | IEEE80211_STA_NOTEXIST); | |
893 | WARN_ON_ONCE(ret != 0); | |
894 | } | |
34e89507 | 895 | |
bdcbd8e0 JB |
896 | sta_dbg(sdata, "Removed STA %pM\n", sta->sta.addr); |
897 | ||
ec15e68b JM |
898 | cfg80211_del_sta(sdata->dev, sta->sta.addr, GFP_KERNEL); |
899 | ||
34e89507 JB |
900 | rate_control_remove_sta_debugfs(sta); |
901 | ieee80211_sta_debugfs_remove(sta); | |
21f659bf | 902 | ieee80211_recalc_min_chandef(sdata); |
34e89507 | 903 | |
d34ba216 | 904 | cleanup_single_sta(sta); |
d778207b JB |
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); | |
34e89507 JB |
917 | |
918 | return 0; | |
4d6141c3 JS |
919 | } |
920 | ||
34e89507 | 921 | int sta_info_destroy_addr(struct ieee80211_sub_if_data *sdata, const u8 *addr) |
4d6141c3 | 922 | { |
34e89507 JB |
923 | struct sta_info *sta; |
924 | int ret; | |
4d6141c3 | 925 | |
34e89507 | 926 | mutex_lock(&sdata->local->sta_mtx); |
7852e361 | 927 | sta = sta_info_get(sdata, addr); |
34e89507 JB |
928 | ret = __sta_info_destroy(sta); |
929 | mutex_unlock(&sdata->local->sta_mtx); | |
4d6141c3 JS |
930 | |
931 | return ret; | |
932 | } | |
933 | ||
34e89507 JB |
934 | int sta_info_destroy_addr_bss(struct ieee80211_sub_if_data *sdata, |
935 | const u8 *addr) | |
e9f207f0 | 936 | { |
34e89507 JB |
937 | struct sta_info *sta; |
938 | int ret; | |
e9f207f0 | 939 | |
34e89507 | 940 | mutex_lock(&sdata->local->sta_mtx); |
7852e361 | 941 | sta = sta_info_get_bss(sdata, addr); |
34e89507 JB |
942 | ret = __sta_info_destroy(sta); |
943 | mutex_unlock(&sdata->local->sta_mtx); | |
d0709a65 | 944 | |
34e89507 JB |
945 | return ret; |
946 | } | |
e9f207f0 | 947 | |
34e89507 JB |
948 | static void sta_info_cleanup(unsigned long data) |
949 | { | |
950 | struct ieee80211_local *local = (struct ieee80211_local *) data; | |
951 | struct sta_info *sta; | |
3393a608 | 952 | bool timer_needed = false; |
34e89507 JB |
953 | |
954 | rcu_read_lock(); | |
955 | list_for_each_entry_rcu(sta, &local->sta_list, list) | |
3393a608 JO |
956 | if (sta_info_cleanup_expire_buffered(local, sta)) |
957 | timer_needed = true; | |
34e89507 | 958 | rcu_read_unlock(); |
e9f207f0 | 959 | |
34e89507 JB |
960 | if (local->quiescing) |
961 | return; | |
d0709a65 | 962 | |
3393a608 JO |
963 | if (!timer_needed) |
964 | return; | |
965 | ||
26d59535 JB |
966 | mod_timer(&local->sta_cleanup, |
967 | round_jiffies(jiffies + STA_INFO_CLEANUP_INTERVAL)); | |
e9f207f0 | 968 | } |
e9f207f0 | 969 | |
f0706e82 JB |
970 | void sta_info_init(struct ieee80211_local *local) |
971 | { | |
4d33960b | 972 | spin_lock_init(&local->tim_lock); |
34e89507 | 973 | mutex_init(&local->sta_mtx); |
f0706e82 | 974 | INIT_LIST_HEAD(&local->sta_list); |
f0706e82 | 975 | |
b24b8a24 PE |
976 | setup_timer(&local->sta_cleanup, sta_info_cleanup, |
977 | (unsigned long)local); | |
f0706e82 JB |
978 | } |
979 | ||
980 | void sta_info_stop(struct ieee80211_local *local) | |
981 | { | |
a56f992c | 982 | del_timer_sync(&local->sta_cleanup); |
f0706e82 JB |
983 | } |
984 | ||
051007d9 | 985 | |
e716251d | 986 | int __sta_info_flush(struct ieee80211_sub_if_data *sdata, bool vlans) |
f0706e82 | 987 | { |
b998e8bb | 988 | struct ieee80211_local *local = sdata->local; |
f0706e82 | 989 | struct sta_info *sta, *tmp; |
d778207b | 990 | LIST_HEAD(free_list); |
44213b5e | 991 | int ret = 0; |
f0706e82 | 992 | |
d0709a65 | 993 | might_sleep(); |
be8755e1 | 994 | |
e716251d JB |
995 | WARN_ON(vlans && sdata->vif.type != NL80211_IFTYPE_AP); |
996 | WARN_ON(vlans && !sdata->bss); | |
997 | ||
34e89507 | 998 | mutex_lock(&local->sta_mtx); |
d0709a65 | 999 | list_for_each_entry_safe(sta, tmp, &local->sta_list, list) { |
e716251d JB |
1000 | if (sdata == sta->sdata || |
1001 | (vlans && sdata->bss == sta->sdata->bss)) { | |
d778207b JB |
1002 | if (!WARN_ON(__sta_info_destroy_part1(sta))) |
1003 | list_add(&sta->free_list, &free_list); | |
34316837 JB |
1004 | ret++; |
1005 | } | |
be8755e1 | 1006 | } |
d778207b JB |
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 | } | |
34e89507 | 1013 | mutex_unlock(&local->sta_mtx); |
44213b5e | 1014 | |
051007d9 JB |
1015 | return ret; |
1016 | } | |
1017 | ||
24723d1b JB |
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; | |
24723d1b | 1023 | |
34e89507 | 1024 | mutex_lock(&local->sta_mtx); |
e46a2cf9 MSS |
1025 | |
1026 | list_for_each_entry_safe(sta, tmp, &local->sta_list, list) { | |
ec2b774e ML |
1027 | if (sdata != sta->sdata) |
1028 | continue; | |
1029 | ||
24723d1b | 1030 | if (time_after(jiffies, sta->last_rx + exp_time)) { |
eea57d42 MSS |
1031 | sta_dbg(sta->sdata, "expiring inactive STA %pM\n", |
1032 | sta->sta.addr); | |
3f52b7e3 MP |
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 | ||
34e89507 | 1038 | WARN_ON(__sta_info_destroy(sta)); |
24723d1b | 1039 | } |
e46a2cf9 MSS |
1040 | } |
1041 | ||
34e89507 | 1042 | mutex_unlock(&local->sta_mtx); |
24723d1b | 1043 | } |
17741cdc | 1044 | |
686b9cb9 BG |
1045 | struct ieee80211_sta *ieee80211_find_sta_by_ifaddr(struct ieee80211_hw *hw, |
1046 | const u8 *addr, | |
1047 | const u8 *localaddr) | |
17741cdc | 1048 | { |
abe60632 | 1049 | struct sta_info *sta, *nxt; |
17741cdc | 1050 | |
686b9cb9 BG |
1051 | /* |
1052 | * Just return a random station if localaddr is NULL | |
1053 | * ... first in list. | |
1054 | */ | |
f7c65594 | 1055 | for_each_sta_info(hw_to_local(hw), addr, sta, nxt) { |
686b9cb9 | 1056 | if (localaddr && |
b203ca39 | 1057 | !ether_addr_equal(sta->sdata->vif.addr, localaddr)) |
686b9cb9 | 1058 | continue; |
f7c65594 JB |
1059 | if (!sta->uploaded) |
1060 | return NULL; | |
abe60632 | 1061 | return &sta->sta; |
f7c65594 JB |
1062 | } |
1063 | ||
abe60632 | 1064 | return NULL; |
17741cdc | 1065 | } |
686b9cb9 | 1066 | EXPORT_SYMBOL_GPL(ieee80211_find_sta_by_ifaddr); |
5ed176e1 JB |
1067 | |
1068 | struct ieee80211_sta *ieee80211_find_sta(struct ieee80211_vif *vif, | |
1069 | const u8 *addr) | |
1070 | { | |
f7c65594 | 1071 | struct sta_info *sta; |
5ed176e1 JB |
1072 | |
1073 | if (!vif) | |
1074 | return NULL; | |
1075 | ||
f7c65594 JB |
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; | |
5ed176e1 | 1082 | |
f7c65594 | 1083 | return &sta->sta; |
5ed176e1 | 1084 | } |
17741cdc | 1085 | EXPORT_SYMBOL(ieee80211_find_sta); |
af818581 | 1086 | |
e3685e03 JB |
1087 | /* powersave support code */ |
1088 | void ieee80211_sta_ps_deliver_wakeup(struct sta_info *sta) | |
50a9432d | 1089 | { |
608383bf | 1090 | struct ieee80211_sub_if_data *sdata = sta->sdata; |
e3685e03 JB |
1091 | struct ieee80211_local *local = sdata->local; |
1092 | struct sk_buff_head pending; | |
1093 | int filtered = 0, buffered = 0, ac; | |
1094 | unsigned long flags; | |
d012a605 MP |
1095 | struct ps_data *ps; |
1096 | ||
3918edb0 FF |
1097 | if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) |
1098 | sdata = container_of(sdata->bss, struct ieee80211_sub_if_data, | |
1099 | u.ap); | |
1100 | ||
1101 | if (sdata->vif.type == NL80211_IFTYPE_AP) | |
d012a605 | 1102 | ps = &sdata->bss->ps; |
3f52b7e3 MP |
1103 | else if (ieee80211_vif_is_mesh(&sdata->vif)) |
1104 | ps = &sdata->u.mesh.ps; | |
d012a605 MP |
1105 | else |
1106 | return; | |
50a9432d | 1107 | |
c2c98fde | 1108 | clear_sta_flag(sta, WLAN_STA_SP); |
47086fc5 | 1109 | |
5a306f58 | 1110 | BUILD_BUG_ON(BITS_TO_LONGS(IEEE80211_NUM_TIDS) > 1); |
948d887d | 1111 | sta->driver_buffered_tids = 0; |
af818581 | 1112 | |
d057e5a3 AN |
1113 | if (!(local->hw.flags & IEEE80211_HW_AP_LINK_PS)) |
1114 | drv_sta_notify(local, sdata, STA_NOTIFY_AWAKE, &sta->sta); | |
af818581 | 1115 | |
948d887d | 1116 | skb_queue_head_init(&pending); |
af818581 | 1117 | |
1d147bfa EG |
1118 | /* sync with ieee80211_tx_h_unicast_ps_buf */ |
1119 | spin_lock(&sta->ps_lock); | |
af818581 | 1120 | /* Send all buffered frames to the station */ |
948d887d JB |
1121 | for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) { |
1122 | int count = skb_queue_len(&pending), tmp; | |
1123 | ||
987c285c | 1124 | spin_lock_irqsave(&sta->tx_filtered[ac].lock, flags); |
948d887d | 1125 | skb_queue_splice_tail_init(&sta->tx_filtered[ac], &pending); |
987c285c | 1126 | spin_unlock_irqrestore(&sta->tx_filtered[ac].lock, flags); |
948d887d JB |
1127 | tmp = skb_queue_len(&pending); |
1128 | filtered += tmp - count; | |
1129 | count = tmp; | |
1130 | ||
987c285c | 1131 | spin_lock_irqsave(&sta->ps_tx_buf[ac].lock, flags); |
948d887d | 1132 | skb_queue_splice_tail_init(&sta->ps_tx_buf[ac], &pending); |
987c285c | 1133 | spin_unlock_irqrestore(&sta->ps_tx_buf[ac].lock, flags); |
948d887d JB |
1134 | tmp = skb_queue_len(&pending); |
1135 | buffered += tmp - count; | |
1136 | } | |
1137 | ||
e3685e03 | 1138 | ieee80211_add_pending_skbs(local, &pending); |
5ac2e350 JB |
1139 | |
1140 | /* now we're no longer in the deliver code */ | |
1141 | clear_sta_flag(sta, WLAN_STA_PS_DELIVER); | |
1142 | ||
1143 | /* The station might have polled and then woken up before we responded, | |
1144 | * so clear these flags now to avoid them sticking around. | |
1145 | */ | |
1146 | clear_sta_flag(sta, WLAN_STA_PSPOLL); | |
1147 | clear_sta_flag(sta, WLAN_STA_UAPSD); | |
1d147bfa | 1148 | spin_unlock(&sta->ps_lock); |
948d887d | 1149 | |
e3685e03 JB |
1150 | atomic_dec(&ps->num_sta_ps); |
1151 | ||
687da132 | 1152 | /* This station just woke up and isn't aware of our SMPS state */ |
062f1d6d CYY |
1153 | if (!ieee80211_vif_is_mesh(&sdata->vif) && |
1154 | !ieee80211_smps_is_restrictive(sta->known_smps_mode, | |
687da132 EG |
1155 | sdata->smps_mode) && |
1156 | sta->known_smps_mode != sdata->bss->req_smps && | |
1157 | sta_info_tx_streams(sta) != 1) { | |
1158 | ht_dbg(sdata, | |
1159 | "%pM just woke up and MIMO capable - update SMPS\n", | |
1160 | sta->sta.addr); | |
1161 | ieee80211_send_smps_action(sdata, sdata->bss->req_smps, | |
1162 | sta->sta.addr, | |
1163 | sdata->vif.bss_conf.bssid); | |
1164 | } | |
1165 | ||
af818581 JB |
1166 | local->total_ps_buffered -= buffered; |
1167 | ||
c868cb35 JB |
1168 | sta_info_recalc_tim(sta); |
1169 | ||
bdcbd8e0 JB |
1170 | ps_dbg(sdata, |
1171 | "STA %pM aid %d sending %d filtered/%d PS frames since STA not sleeping anymore\n", | |
1172 | sta->sta.addr, sta->sta.aid, filtered, buffered); | |
af818581 JB |
1173 | } |
1174 | ||
ce662b44 JB |
1175 | static void ieee80211_send_null_response(struct ieee80211_sub_if_data *sdata, |
1176 | struct sta_info *sta, int tid, | |
b77cf4f8 JB |
1177 | enum ieee80211_frame_release_type reason, |
1178 | bool call_driver) | |
af818581 | 1179 | { |
af818581 | 1180 | struct ieee80211_local *local = sdata->local; |
ce662b44 | 1181 | struct ieee80211_qos_hdr *nullfunc; |
af818581 | 1182 | struct sk_buff *skb; |
ce662b44 JB |
1183 | int size = sizeof(*nullfunc); |
1184 | __le16 fc; | |
c2c98fde | 1185 | bool qos = test_sta_flag(sta, WLAN_STA_WME); |
ce662b44 | 1186 | struct ieee80211_tx_info *info; |
55de908a | 1187 | struct ieee80211_chanctx_conf *chanctx_conf; |
af818581 | 1188 | |
ce662b44 JB |
1189 | if (qos) { |
1190 | fc = cpu_to_le16(IEEE80211_FTYPE_DATA | | |
1191 | IEEE80211_STYPE_QOS_NULLFUNC | | |
1192 | IEEE80211_FCTL_FROMDS); | |
1193 | } else { | |
1194 | size -= 2; | |
1195 | fc = cpu_to_le16(IEEE80211_FTYPE_DATA | | |
1196 | IEEE80211_STYPE_NULLFUNC | | |
1197 | IEEE80211_FCTL_FROMDS); | |
af818581 | 1198 | } |
af818581 | 1199 | |
ce662b44 JB |
1200 | skb = dev_alloc_skb(local->hw.extra_tx_headroom + size); |
1201 | if (!skb) | |
1202 | return; | |
1203 | ||
1204 | skb_reserve(skb, local->hw.extra_tx_headroom); | |
1205 | ||
1206 | nullfunc = (void *) skb_put(skb, size); | |
1207 | nullfunc->frame_control = fc; | |
1208 | nullfunc->duration_id = 0; | |
1209 | memcpy(nullfunc->addr1, sta->sta.addr, ETH_ALEN); | |
1210 | memcpy(nullfunc->addr2, sdata->vif.addr, ETH_ALEN); | |
1211 | memcpy(nullfunc->addr3, sdata->vif.addr, ETH_ALEN); | |
864a6040 | 1212 | nullfunc->seq_ctrl = 0; |
ce662b44 | 1213 | |
59b66255 JB |
1214 | skb->priority = tid; |
1215 | skb_set_queue_mapping(skb, ieee802_1d_to_ac[tid]); | |
ce662b44 | 1216 | if (qos) { |
ce662b44 JB |
1217 | nullfunc->qos_ctrl = cpu_to_le16(tid); |
1218 | ||
40b96408 | 1219 | if (reason == IEEE80211_FRAME_RELEASE_UAPSD) |
ce662b44 JB |
1220 | nullfunc->qos_ctrl |= |
1221 | cpu_to_le16(IEEE80211_QOS_CTL_EOSP); | |
1222 | } | |
1223 | ||
1224 | info = IEEE80211_SKB_CB(skb); | |
1225 | ||
1226 | /* | |
1227 | * Tell TX path to send this frame even though the | |
1228 | * STA may still remain is PS mode after this frame | |
deeaee19 JB |
1229 | * exchange. Also set EOSP to indicate this packet |
1230 | * ends the poll/service period. | |
ce662b44 | 1231 | */ |
02f2f1a9 | 1232 | info->flags |= IEEE80211_TX_CTL_NO_PS_BUFFER | |
d6d23de2 | 1233 | IEEE80211_TX_CTL_PS_RESPONSE | |
deeaee19 JB |
1234 | IEEE80211_TX_STATUS_EOSP | |
1235 | IEEE80211_TX_CTL_REQ_TX_STATUS; | |
ce662b44 | 1236 | |
b77cf4f8 JB |
1237 | if (call_driver) |
1238 | drv_allow_buffered_frames(local, sta, BIT(tid), 1, | |
1239 | reason, false); | |
40b96408 | 1240 | |
89afe614 JB |
1241 | skb->dev = sdata->dev; |
1242 | ||
55de908a JB |
1243 | rcu_read_lock(); |
1244 | chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf); | |
1245 | if (WARN_ON(!chanctx_conf)) { | |
1246 | rcu_read_unlock(); | |
1247 | kfree_skb(skb); | |
1248 | return; | |
1249 | } | |
1250 | ||
4bf88530 | 1251 | ieee80211_xmit(sdata, skb, chanctx_conf->def.chan->band); |
55de908a | 1252 | rcu_read_unlock(); |
ce662b44 JB |
1253 | } |
1254 | ||
0a1cb809 JB |
1255 | static int find_highest_prio_tid(unsigned long tids) |
1256 | { | |
1257 | /* lower 3 TIDs aren't ordered perfectly */ | |
1258 | if (tids & 0xF8) | |
1259 | return fls(tids) - 1; | |
1260 | /* TID 0 is BE just like TID 3 */ | |
1261 | if (tids & BIT(0)) | |
1262 | return 0; | |
1263 | return fls(tids) - 1; | |
1264 | } | |
1265 | ||
47086fc5 JB |
1266 | static void |
1267 | ieee80211_sta_ps_deliver_response(struct sta_info *sta, | |
1268 | int n_frames, u8 ignored_acs, | |
1269 | enum ieee80211_frame_release_type reason) | |
af818581 JB |
1270 | { |
1271 | struct ieee80211_sub_if_data *sdata = sta->sdata; | |
1272 | struct ieee80211_local *local = sdata->local; | |
948d887d JB |
1273 | bool more_data = false; |
1274 | int ac; | |
4049e09a | 1275 | unsigned long driver_release_tids = 0; |
47086fc5 | 1276 | struct sk_buff_head frames; |
af818581 | 1277 | |
deeaee19 | 1278 | /* Service or PS-Poll period starts */ |
c2c98fde | 1279 | set_sta_flag(sta, WLAN_STA_SP); |
deeaee19 | 1280 | |
47086fc5 | 1281 | __skb_queue_head_init(&frames); |
948d887d | 1282 | |
f9f760b4 | 1283 | /* Get response frame(s) and more data bit for the last one. */ |
948d887d | 1284 | for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) { |
4049e09a JB |
1285 | unsigned long tids; |
1286 | ||
47086fc5 | 1287 | if (ignored_acs & BIT(ac)) |
948d887d JB |
1288 | continue; |
1289 | ||
4049e09a JB |
1290 | tids = ieee80211_tids_for_ac(ac); |
1291 | ||
f9f760b4 JB |
1292 | /* if we already have frames from software, then we can't also |
1293 | * release from hardware queues | |
1294 | */ | |
1295 | if (skb_queue_empty(&frames)) | |
1296 | driver_release_tids |= sta->driver_buffered_tids & tids; | |
948d887d | 1297 | |
f9f760b4 JB |
1298 | if (driver_release_tids) { |
1299 | /* If the driver has data on more than one TID then | |
4049e09a | 1300 | * certainly there's more data if we release just a |
f9f760b4 JB |
1301 | * single frame now (from a single TID). This will |
1302 | * only happen for PS-Poll. | |
4049e09a | 1303 | */ |
47086fc5 JB |
1304 | if (reason == IEEE80211_FRAME_RELEASE_PSPOLL && |
1305 | hweight16(driver_release_tids) > 1) { | |
4049e09a JB |
1306 | more_data = true; |
1307 | driver_release_tids = | |
0a1cb809 JB |
1308 | BIT(find_highest_prio_tid( |
1309 | driver_release_tids)); | |
4049e09a JB |
1310 | break; |
1311 | } | |
f9f760b4 JB |
1312 | } else { |
1313 | struct sk_buff *skb; | |
1314 | ||
1315 | while (n_frames > 0) { | |
1316 | skb = skb_dequeue(&sta->tx_filtered[ac]); | |
1317 | if (!skb) { | |
1318 | skb = skb_dequeue( | |
1319 | &sta->ps_tx_buf[ac]); | |
1320 | if (skb) | |
1321 | local->total_ps_buffered--; | |
1322 | } | |
1323 | if (!skb) | |
1324 | break; | |
1325 | n_frames--; | |
1326 | __skb_queue_tail(&frames, skb); | |
1327 | } | |
4049e09a | 1328 | } |
948d887d | 1329 | |
f9f760b4 JB |
1330 | /* If we have more frames buffered on this AC, then set the |
1331 | * more-data bit and abort the loop since we can't send more | |
1332 | * data from other ACs before the buffered frames from this. | |
1333 | */ | |
948d887d JB |
1334 | if (!skb_queue_empty(&sta->tx_filtered[ac]) || |
1335 | !skb_queue_empty(&sta->ps_tx_buf[ac])) { | |
1336 | more_data = true; | |
1337 | break; | |
1338 | } | |
af818581 | 1339 | } |
af818581 | 1340 | |
f9f760b4 | 1341 | if (skb_queue_empty(&frames) && !driver_release_tids) { |
ce662b44 | 1342 | int tid; |
af818581 JB |
1343 | |
1344 | /* | |
ce662b44 JB |
1345 | * For PS-Poll, this can only happen due to a race condition |
1346 | * when we set the TIM bit and the station notices it, but | |
1347 | * before it can poll for the frame we expire it. | |
1348 | * | |
1349 | * For uAPSD, this is said in the standard (11.2.1.5 h): | |
1350 | * At each unscheduled SP for a non-AP STA, the AP shall | |
1351 | * attempt to transmit at least one MSDU or MMPDU, but no | |
1352 | * more than the value specified in the Max SP Length field | |
1353 | * in the QoS Capability element from delivery-enabled ACs, | |
1354 | * that are destined for the non-AP STA. | |
1355 | * | |
1356 | * Since we have no other MSDU/MMPDU, transmit a QoS null frame. | |
af818581 | 1357 | */ |
af818581 | 1358 | |
ce662b44 JB |
1359 | /* This will evaluate to 1, 3, 5 or 7. */ |
1360 | tid = 7 - ((ffs(~ignored_acs) - 1) << 1); | |
af818581 | 1361 | |
b77cf4f8 | 1362 | ieee80211_send_null_response(sdata, sta, tid, reason, true); |
f9f760b4 | 1363 | } else if (!driver_release_tids) { |
47086fc5 JB |
1364 | struct sk_buff_head pending; |
1365 | struct sk_buff *skb; | |
40b96408 JB |
1366 | int num = 0; |
1367 | u16 tids = 0; | |
b77cf4f8 | 1368 | bool need_null = false; |
af818581 | 1369 | |
47086fc5 | 1370 | skb_queue_head_init(&pending); |
af818581 | 1371 | |
47086fc5 JB |
1372 | while ((skb = __skb_dequeue(&frames))) { |
1373 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); | |
1374 | struct ieee80211_hdr *hdr = (void *) skb->data; | |
40b96408 JB |
1375 | u8 *qoshdr = NULL; |
1376 | ||
1377 | num++; | |
af818581 | 1378 | |
47086fc5 JB |
1379 | /* |
1380 | * Tell TX path to send this frame even though the | |
1381 | * STA may still remain is PS mode after this frame | |
1382 | * exchange. | |
1383 | */ | |
d6d23de2 FF |
1384 | info->flags |= IEEE80211_TX_CTL_NO_PS_BUFFER | |
1385 | IEEE80211_TX_CTL_PS_RESPONSE; | |
47086fc5 JB |
1386 | |
1387 | /* | |
1388 | * Use MoreData flag to indicate whether there are | |
1389 | * more buffered frames for this STA | |
1390 | */ | |
24b9c373 | 1391 | if (more_data || !skb_queue_empty(&frames)) |
47086fc5 JB |
1392 | hdr->frame_control |= |
1393 | cpu_to_le16(IEEE80211_FCTL_MOREDATA); | |
24b9c373 JD |
1394 | else |
1395 | hdr->frame_control &= | |
1396 | cpu_to_le16(~IEEE80211_FCTL_MOREDATA); | |
47086fc5 | 1397 | |
40b96408 JB |
1398 | if (ieee80211_is_data_qos(hdr->frame_control) || |
1399 | ieee80211_is_qos_nullfunc(hdr->frame_control)) | |
1400 | qoshdr = ieee80211_get_qos_ctl(hdr); | |
1401 | ||
b77cf4f8 | 1402 | tids |= BIT(skb->priority); |
52a3f20c | 1403 | |
b77cf4f8 JB |
1404 | __skb_queue_tail(&pending, skb); |
1405 | ||
1406 | /* end service period after last frame or add one */ | |
1407 | if (!skb_queue_empty(&frames)) | |
1408 | continue; | |
1409 | ||
1410 | if (reason != IEEE80211_FRAME_RELEASE_UAPSD) { | |
1411 | /* for PS-Poll, there's only one frame */ | |
52a3f20c MP |
1412 | info->flags |= IEEE80211_TX_STATUS_EOSP | |
1413 | IEEE80211_TX_CTL_REQ_TX_STATUS; | |
b77cf4f8 | 1414 | break; |
52a3f20c | 1415 | } |
deeaee19 | 1416 | |
b77cf4f8 JB |
1417 | /* For uAPSD, things are a bit more complicated. If the |
1418 | * last frame has a QoS header (i.e. is a QoS-data or | |
1419 | * QoS-nulldata frame) then just set the EOSP bit there | |
1420 | * and be done. | |
1421 | * If the frame doesn't have a QoS header (which means | |
1422 | * it should be a bufferable MMPDU) then we can't set | |
1423 | * the EOSP bit in the QoS header; add a QoS-nulldata | |
1424 | * frame to the list to send it after the MMPDU. | |
1425 | * | |
1426 | * Note that this code is only in the mac80211-release | |
1427 | * code path, we assume that the driver will not buffer | |
1428 | * anything but QoS-data frames, or if it does, will | |
1429 | * create the QoS-nulldata frame by itself if needed. | |
1430 | * | |
1431 | * Cf. 802.11-2012 10.2.1.10 (c). | |
1432 | */ | |
1433 | if (qoshdr) { | |
1434 | *qoshdr |= IEEE80211_QOS_CTL_EOSP; | |
40b96408 | 1435 | |
b77cf4f8 JB |
1436 | info->flags |= IEEE80211_TX_STATUS_EOSP | |
1437 | IEEE80211_TX_CTL_REQ_TX_STATUS; | |
1438 | } else { | |
1439 | /* The standard isn't completely clear on this | |
1440 | * as it says the more-data bit should be set | |
1441 | * if there are more BUs. The QoS-Null frame | |
1442 | * we're about to send isn't buffered yet, we | |
1443 | * only create it below, but let's pretend it | |
1444 | * was buffered just in case some clients only | |
1445 | * expect more-data=0 when eosp=1. | |
1446 | */ | |
1447 | hdr->frame_control |= | |
1448 | cpu_to_le16(IEEE80211_FCTL_MOREDATA); | |
1449 | need_null = true; | |
1450 | num++; | |
1451 | } | |
1452 | break; | |
47086fc5 | 1453 | } |
af818581 | 1454 | |
40b96408 JB |
1455 | drv_allow_buffered_frames(local, sta, tids, num, |
1456 | reason, more_data); | |
1457 | ||
47086fc5 | 1458 | ieee80211_add_pending_skbs(local, &pending); |
af818581 | 1459 | |
b77cf4f8 JB |
1460 | if (need_null) |
1461 | ieee80211_send_null_response( | |
1462 | sdata, sta, find_highest_prio_tid(tids), | |
1463 | reason, false); | |
1464 | ||
c868cb35 | 1465 | sta_info_recalc_tim(sta); |
af818581 JB |
1466 | } else { |
1467 | /* | |
4049e09a JB |
1468 | * We need to release a frame that is buffered somewhere in the |
1469 | * driver ... it'll have to handle that. | |
f9f760b4 JB |
1470 | * Note that the driver also has to check the number of frames |
1471 | * on the TIDs we're releasing from - if there are more than | |
1472 | * n_frames it has to set the more-data bit (if we didn't ask | |
1473 | * it to set it anyway due to other buffered frames); if there | |
1474 | * are fewer than n_frames it has to make sure to adjust that | |
1475 | * to allow the service period to end properly. | |
4049e09a JB |
1476 | */ |
1477 | drv_release_buffered_frames(local, sta, driver_release_tids, | |
47086fc5 | 1478 | n_frames, reason, more_data); |
4049e09a JB |
1479 | |
1480 | /* | |
1481 | * Note that we don't recalculate the TIM bit here as it would | |
1482 | * most likely have no effect at all unless the driver told us | |
f9f760b4 | 1483 | * that the TID(s) became empty before returning here from the |
4049e09a | 1484 | * release function. |
f9f760b4 | 1485 | * Either way, however, when the driver tells us that the TID(s) |
4049e09a | 1486 | * became empty we'll do the TIM recalculation. |
af818581 | 1487 | */ |
af818581 JB |
1488 | } |
1489 | } | |
1490 | ||
47086fc5 JB |
1491 | void ieee80211_sta_ps_deliver_poll_response(struct sta_info *sta) |
1492 | { | |
1493 | u8 ignore_for_response = sta->sta.uapsd_queues; | |
1494 | ||
1495 | /* | |
1496 | * If all ACs are delivery-enabled then we should reply | |
1497 | * from any of them, if only some are enabled we reply | |
1498 | * only from the non-enabled ones. | |
1499 | */ | |
1500 | if (ignore_for_response == BIT(IEEE80211_NUM_ACS) - 1) | |
1501 | ignore_for_response = 0; | |
1502 | ||
1503 | ieee80211_sta_ps_deliver_response(sta, 1, ignore_for_response, | |
1504 | IEEE80211_FRAME_RELEASE_PSPOLL); | |
1505 | } | |
1506 | ||
1507 | void ieee80211_sta_ps_deliver_uapsd(struct sta_info *sta) | |
1508 | { | |
1509 | int n_frames = sta->sta.max_sp; | |
1510 | u8 delivery_enabled = sta->sta.uapsd_queues; | |
1511 | ||
1512 | /* | |
1513 | * If we ever grow support for TSPEC this might happen if | |
1514 | * the TSPEC update from hostapd comes in between a trigger | |
1515 | * frame setting WLAN_STA_UAPSD in the RX path and this | |
1516 | * actually getting called. | |
1517 | */ | |
1518 | if (!delivery_enabled) | |
1519 | return; | |
1520 | ||
47086fc5 JB |
1521 | switch (sta->sta.max_sp) { |
1522 | case 1: | |
1523 | n_frames = 2; | |
1524 | break; | |
1525 | case 2: | |
1526 | n_frames = 4; | |
1527 | break; | |
1528 | case 3: | |
1529 | n_frames = 6; | |
1530 | break; | |
1531 | case 0: | |
1532 | /* XXX: what is a good value? */ | |
1533 | n_frames = 8; | |
1534 | break; | |
1535 | } | |
1536 | ||
1537 | ieee80211_sta_ps_deliver_response(sta, n_frames, ~delivery_enabled, | |
1538 | IEEE80211_FRAME_RELEASE_UAPSD); | |
1539 | } | |
1540 | ||
af818581 JB |
1541 | void ieee80211_sta_block_awake(struct ieee80211_hw *hw, |
1542 | struct ieee80211_sta *pubsta, bool block) | |
1543 | { | |
1544 | struct sta_info *sta = container_of(pubsta, struct sta_info, sta); | |
1545 | ||
b5878a2d JB |
1546 | trace_api_sta_block_awake(sta->local, pubsta, block); |
1547 | ||
5ac2e350 | 1548 | if (block) { |
c2c98fde | 1549 | set_sta_flag(sta, WLAN_STA_PS_DRIVER); |
5ac2e350 JB |
1550 | return; |
1551 | } | |
1552 | ||
1553 | if (!test_sta_flag(sta, WLAN_STA_PS_DRIVER)) | |
1554 | return; | |
1555 | ||
1556 | if (!test_sta_flag(sta, WLAN_STA_PS_STA)) { | |
1557 | set_sta_flag(sta, WLAN_STA_PS_DELIVER); | |
1558 | clear_sta_flag(sta, WLAN_STA_PS_DRIVER); | |
1559 | ieee80211_queue_work(hw, &sta->drv_deliver_wk); | |
1560 | } else if (test_sta_flag(sta, WLAN_STA_PSPOLL) || | |
1561 | test_sta_flag(sta, WLAN_STA_UAPSD)) { | |
1562 | /* must be asleep in this case */ | |
1563 | clear_sta_flag(sta, WLAN_STA_PS_DRIVER); | |
1564 | ieee80211_queue_work(hw, &sta->drv_deliver_wk); | |
1565 | } else { | |
1566 | clear_sta_flag(sta, WLAN_STA_PS_DRIVER); | |
1567 | } | |
af818581 JB |
1568 | } |
1569 | EXPORT_SYMBOL(ieee80211_sta_block_awake); | |
dcf55fb5 | 1570 | |
e943789e | 1571 | void ieee80211_sta_eosp(struct ieee80211_sta *pubsta) |
37fbd908 JB |
1572 | { |
1573 | struct sta_info *sta = container_of(pubsta, struct sta_info, sta); | |
1574 | struct ieee80211_local *local = sta->local; | |
37fbd908 JB |
1575 | |
1576 | trace_api_eosp(local, pubsta); | |
1577 | ||
e943789e | 1578 | clear_sta_flag(sta, WLAN_STA_SP); |
37fbd908 | 1579 | } |
e943789e | 1580 | EXPORT_SYMBOL(ieee80211_sta_eosp); |
37fbd908 | 1581 | |
042ec453 JB |
1582 | void ieee80211_sta_set_buffered(struct ieee80211_sta *pubsta, |
1583 | u8 tid, bool buffered) | |
dcf55fb5 FF |
1584 | { |
1585 | struct sta_info *sta = container_of(pubsta, struct sta_info, sta); | |
1586 | ||
5a306f58 | 1587 | if (WARN_ON(tid >= IEEE80211_NUM_TIDS)) |
042ec453 JB |
1588 | return; |
1589 | ||
1b000789 JB |
1590 | trace_api_sta_set_buffered(sta->local, pubsta, tid, buffered); |
1591 | ||
948d887d JB |
1592 | if (buffered) |
1593 | set_bit(tid, &sta->driver_buffered_tids); | |
1594 | else | |
1595 | clear_bit(tid, &sta->driver_buffered_tids); | |
1596 | ||
c868cb35 | 1597 | sta_info_recalc_tim(sta); |
dcf55fb5 | 1598 | } |
042ec453 | 1599 | EXPORT_SYMBOL(ieee80211_sta_set_buffered); |
d9a7ddb0 | 1600 | |
83d5cc01 JB |
1601 | int sta_info_move_state(struct sta_info *sta, |
1602 | enum ieee80211_sta_state new_state) | |
d9a7ddb0 | 1603 | { |
8bf11d8d | 1604 | might_sleep(); |
d9a7ddb0 JB |
1605 | |
1606 | if (sta->sta_state == new_state) | |
1607 | return 0; | |
1608 | ||
f09603a2 JB |
1609 | /* check allowed transitions first */ |
1610 | ||
1611 | switch (new_state) { | |
1612 | case IEEE80211_STA_NONE: | |
1613 | if (sta->sta_state != IEEE80211_STA_AUTH) | |
1614 | return -EINVAL; | |
1615 | break; | |
1616 | case IEEE80211_STA_AUTH: | |
1617 | if (sta->sta_state != IEEE80211_STA_NONE && | |
1618 | sta->sta_state != IEEE80211_STA_ASSOC) | |
1619 | return -EINVAL; | |
1620 | break; | |
1621 | case IEEE80211_STA_ASSOC: | |
1622 | if (sta->sta_state != IEEE80211_STA_AUTH && | |
1623 | sta->sta_state != IEEE80211_STA_AUTHORIZED) | |
1624 | return -EINVAL; | |
1625 | break; | |
1626 | case IEEE80211_STA_AUTHORIZED: | |
1627 | if (sta->sta_state != IEEE80211_STA_ASSOC) | |
1628 | return -EINVAL; | |
1629 | break; | |
1630 | default: | |
1631 | WARN(1, "invalid state %d", new_state); | |
1632 | return -EINVAL; | |
1633 | } | |
1634 | ||
bdcbd8e0 JB |
1635 | sta_dbg(sta->sdata, "moving STA %pM to state %d\n", |
1636 | sta->sta.addr, new_state); | |
f09603a2 JB |
1637 | |
1638 | /* | |
1639 | * notify the driver before the actual changes so it can | |
1640 | * fail the transition | |
1641 | */ | |
1642 | if (test_sta_flag(sta, WLAN_STA_INSERTED)) { | |
1643 | int err = drv_sta_state(sta->local, sta->sdata, sta, | |
1644 | sta->sta_state, new_state); | |
1645 | if (err) | |
1646 | return err; | |
1647 | } | |
1648 | ||
1649 | /* reflect the change in all state variables */ | |
1650 | ||
d9a7ddb0 JB |
1651 | switch (new_state) { |
1652 | case IEEE80211_STA_NONE: | |
1653 | if (sta->sta_state == IEEE80211_STA_AUTH) | |
1654 | clear_bit(WLAN_STA_AUTH, &sta->_flags); | |
d9a7ddb0 JB |
1655 | break; |
1656 | case IEEE80211_STA_AUTH: | |
1657 | if (sta->sta_state == IEEE80211_STA_NONE) | |
1658 | set_bit(WLAN_STA_AUTH, &sta->_flags); | |
1659 | else if (sta->sta_state == IEEE80211_STA_ASSOC) | |
1660 | clear_bit(WLAN_STA_ASSOC, &sta->_flags); | |
d9a7ddb0 JB |
1661 | break; |
1662 | case IEEE80211_STA_ASSOC: | |
29623892 | 1663 | if (sta->sta_state == IEEE80211_STA_AUTH) { |
d9a7ddb0 | 1664 | set_bit(WLAN_STA_ASSOC, &sta->_flags); |
29623892 | 1665 | } else if (sta->sta_state == IEEE80211_STA_AUTHORIZED) { |
7e3ed02c FF |
1666 | if (sta->sdata->vif.type == NL80211_IFTYPE_AP || |
1667 | (sta->sdata->vif.type == NL80211_IFTYPE_AP_VLAN && | |
1668 | !sta->sdata->u.vlan.sta)) | |
1669 | atomic_dec(&sta->sdata->bss->num_mcast_sta); | |
d9a7ddb0 | 1670 | clear_bit(WLAN_STA_AUTHORIZED, &sta->_flags); |
f09603a2 | 1671 | } |
d9a7ddb0 JB |
1672 | break; |
1673 | case IEEE80211_STA_AUTHORIZED: | |
29623892 | 1674 | if (sta->sta_state == IEEE80211_STA_ASSOC) { |
7e3ed02c FF |
1675 | if (sta->sdata->vif.type == NL80211_IFTYPE_AP || |
1676 | (sta->sdata->vif.type == NL80211_IFTYPE_AP_VLAN && | |
1677 | !sta->sdata->u.vlan.sta)) | |
1678 | atomic_inc(&sta->sdata->bss->num_mcast_sta); | |
d9a7ddb0 | 1679 | set_bit(WLAN_STA_AUTHORIZED, &sta->_flags); |
f09603a2 | 1680 | } |
d9a7ddb0 JB |
1681 | break; |
1682 | default: | |
f09603a2 | 1683 | break; |
d9a7ddb0 JB |
1684 | } |
1685 | ||
d9a7ddb0 JB |
1686 | sta->sta_state = new_state; |
1687 | ||
1688 | return 0; | |
1689 | } | |
687da132 EG |
1690 | |
1691 | u8 sta_info_tx_streams(struct sta_info *sta) | |
1692 | { | |
1693 | struct ieee80211_sta_ht_cap *ht_cap = &sta->sta.ht_cap; | |
1694 | u8 rx_streams; | |
1695 | ||
1696 | if (!sta->sta.ht_cap.ht_supported) | |
1697 | return 1; | |
1698 | ||
1699 | if (sta->sta.vht_cap.vht_supported) { | |
1700 | int i; | |
1701 | u16 tx_mcs_map = | |
1702 | le16_to_cpu(sta->sta.vht_cap.vht_mcs.tx_mcs_map); | |
1703 | ||
1704 | for (i = 7; i >= 0; i--) | |
1705 | if ((tx_mcs_map & (0x3 << (i * 2))) != | |
1706 | IEEE80211_VHT_MCS_NOT_SUPPORTED) | |
1707 | return i + 1; | |
1708 | } | |
1709 | ||
1710 | if (ht_cap->mcs.rx_mask[3]) | |
1711 | rx_streams = 4; | |
1712 | else if (ht_cap->mcs.rx_mask[2]) | |
1713 | rx_streams = 3; | |
1714 | else if (ht_cap->mcs.rx_mask[1]) | |
1715 | rx_streams = 2; | |
1716 | else | |
1717 | rx_streams = 1; | |
1718 | ||
1719 | if (!(ht_cap->mcs.tx_params & IEEE80211_HT_MCS_TX_RX_DIFF)) | |
1720 | return rx_streams; | |
1721 | ||
1722 | return ((ht_cap->mcs.tx_params & IEEE80211_HT_MCS_TX_MAX_STREAMS_MASK) | |
1723 | >> IEEE80211_HT_MCS_TX_MAX_STREAMS_SHIFT) + 1; | |
1724 | } | |
b7ffbd7e JB |
1725 | |
1726 | void sta_set_sinfo(struct sta_info *sta, struct station_info *sinfo) | |
1727 | { | |
1728 | struct ieee80211_sub_if_data *sdata = sta->sdata; | |
1729 | struct ieee80211_local *local = sdata->local; | |
9a244409 | 1730 | struct rate_control_ref *ref = NULL; |
b7ffbd7e JB |
1731 | struct timespec uptime; |
1732 | u64 packets = 0; | |
1733 | u32 thr = 0; | |
1734 | int i, ac; | |
1735 | ||
9a244409 JL |
1736 | if (test_sta_flag(sta, WLAN_STA_RATE_CONTROL)) |
1737 | ref = local->rate_ctrl; | |
1738 | ||
b7ffbd7e JB |
1739 | sinfo->generation = sdata->local->sta_generation; |
1740 | ||
1741 | sinfo->filled = STATION_INFO_INACTIVE_TIME | | |
1742 | STATION_INFO_RX_BYTES64 | | |
1743 | STATION_INFO_TX_BYTES64 | | |
1744 | STATION_INFO_RX_PACKETS | | |
1745 | STATION_INFO_TX_PACKETS | | |
1746 | STATION_INFO_TX_RETRIES | | |
1747 | STATION_INFO_TX_FAILED | | |
1748 | STATION_INFO_TX_BITRATE | | |
1749 | STATION_INFO_RX_BITRATE | | |
1750 | STATION_INFO_RX_DROP_MISC | | |
1751 | STATION_INFO_BSS_PARAM | | |
1752 | STATION_INFO_CONNECTED_TIME | | |
1753 | STATION_INFO_STA_FLAGS | | |
1754 | STATION_INFO_BEACON_LOSS_COUNT; | |
1755 | ||
18171520 | 1756 | ktime_get_ts(&uptime); |
b7ffbd7e JB |
1757 | sinfo->connected_time = uptime.tv_sec - sta->last_connected; |
1758 | ||
1759 | sinfo->inactive_time = jiffies_to_msecs(jiffies - sta->last_rx); | |
1760 | sinfo->tx_bytes = 0; | |
1761 | for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) { | |
1762 | sinfo->tx_bytes += sta->tx_bytes[ac]; | |
1763 | packets += sta->tx_packets[ac]; | |
1764 | } | |
1765 | sinfo->tx_packets = packets; | |
1766 | sinfo->rx_bytes = sta->rx_bytes; | |
1767 | sinfo->rx_packets = sta->rx_packets; | |
1768 | sinfo->tx_retries = sta->tx_retry_count; | |
1769 | sinfo->tx_failed = sta->tx_retry_failed; | |
1770 | sinfo->rx_dropped_misc = sta->rx_dropped; | |
1771 | sinfo->beacon_loss_count = sta->beacon_loss_count; | |
1772 | ||
1773 | if ((sta->local->hw.flags & IEEE80211_HW_SIGNAL_DBM) || | |
1774 | (sta->local->hw.flags & IEEE80211_HW_SIGNAL_UNSPEC)) { | |
1775 | sinfo->filled |= STATION_INFO_SIGNAL | STATION_INFO_SIGNAL_AVG; | |
1776 | if (!local->ops->get_rssi || | |
1777 | drv_get_rssi(local, sdata, &sta->sta, &sinfo->signal)) | |
1778 | sinfo->signal = (s8)sta->last_signal; | |
1779 | sinfo->signal_avg = (s8) -ewma_read(&sta->avg_signal); | |
1780 | } | |
1781 | if (sta->chains) { | |
1782 | sinfo->filled |= STATION_INFO_CHAIN_SIGNAL | | |
1783 | STATION_INFO_CHAIN_SIGNAL_AVG; | |
1784 | ||
1785 | sinfo->chains = sta->chains; | |
1786 | for (i = 0; i < ARRAY_SIZE(sinfo->chain_signal); i++) { | |
1787 | sinfo->chain_signal[i] = sta->chain_signal_last[i]; | |
1788 | sinfo->chain_signal_avg[i] = | |
1789 | (s8) -ewma_read(&sta->chain_signal_avg[i]); | |
1790 | } | |
1791 | } | |
1792 | ||
1793 | sta_set_rate_info_tx(sta, &sta->last_tx_rate, &sinfo->txrate); | |
1794 | sta_set_rate_info_rx(sta, &sinfo->rxrate); | |
1795 | ||
1796 | if (ieee80211_vif_is_mesh(&sdata->vif)) { | |
1797 | #ifdef CONFIG_MAC80211_MESH | |
1798 | sinfo->filled |= STATION_INFO_LLID | | |
1799 | STATION_INFO_PLID | | |
1800 | STATION_INFO_PLINK_STATE | | |
1801 | STATION_INFO_LOCAL_PM | | |
1802 | STATION_INFO_PEER_PM | | |
1803 | STATION_INFO_NONPEER_PM; | |
1804 | ||
1805 | sinfo->llid = sta->llid; | |
1806 | sinfo->plid = sta->plid; | |
1807 | sinfo->plink_state = sta->plink_state; | |
1808 | if (test_sta_flag(sta, WLAN_STA_TOFFSET_KNOWN)) { | |
1809 | sinfo->filled |= STATION_INFO_T_OFFSET; | |
1810 | sinfo->t_offset = sta->t_offset; | |
1811 | } | |
1812 | sinfo->local_pm = sta->local_pm; | |
1813 | sinfo->peer_pm = sta->peer_pm; | |
1814 | sinfo->nonpeer_pm = sta->nonpeer_pm; | |
1815 | #endif | |
1816 | } | |
1817 | ||
1818 | sinfo->bss_param.flags = 0; | |
1819 | if (sdata->vif.bss_conf.use_cts_prot) | |
1820 | sinfo->bss_param.flags |= BSS_PARAM_FLAGS_CTS_PROT; | |
1821 | if (sdata->vif.bss_conf.use_short_preamble) | |
1822 | sinfo->bss_param.flags |= BSS_PARAM_FLAGS_SHORT_PREAMBLE; | |
1823 | if (sdata->vif.bss_conf.use_short_slot) | |
1824 | sinfo->bss_param.flags |= BSS_PARAM_FLAGS_SHORT_SLOT_TIME; | |
785e21a8 | 1825 | sinfo->bss_param.dtim_period = sdata->vif.bss_conf.dtim_period; |
b7ffbd7e JB |
1826 | sinfo->bss_param.beacon_interval = sdata->vif.bss_conf.beacon_int; |
1827 | ||
1828 | sinfo->sta_flags.set = 0; | |
1829 | sinfo->sta_flags.mask = BIT(NL80211_STA_FLAG_AUTHORIZED) | | |
1830 | BIT(NL80211_STA_FLAG_SHORT_PREAMBLE) | | |
1831 | BIT(NL80211_STA_FLAG_WME) | | |
1832 | BIT(NL80211_STA_FLAG_MFP) | | |
1833 | BIT(NL80211_STA_FLAG_AUTHENTICATED) | | |
1834 | BIT(NL80211_STA_FLAG_ASSOCIATED) | | |
1835 | BIT(NL80211_STA_FLAG_TDLS_PEER); | |
1836 | if (test_sta_flag(sta, WLAN_STA_AUTHORIZED)) | |
1837 | sinfo->sta_flags.set |= BIT(NL80211_STA_FLAG_AUTHORIZED); | |
1838 | if (test_sta_flag(sta, WLAN_STA_SHORT_PREAMBLE)) | |
1839 | sinfo->sta_flags.set |= BIT(NL80211_STA_FLAG_SHORT_PREAMBLE); | |
1840 | if (test_sta_flag(sta, WLAN_STA_WME)) | |
1841 | sinfo->sta_flags.set |= BIT(NL80211_STA_FLAG_WME); | |
1842 | if (test_sta_flag(sta, WLAN_STA_MFP)) | |
1843 | sinfo->sta_flags.set |= BIT(NL80211_STA_FLAG_MFP); | |
1844 | if (test_sta_flag(sta, WLAN_STA_AUTH)) | |
1845 | sinfo->sta_flags.set |= BIT(NL80211_STA_FLAG_AUTHENTICATED); | |
1846 | if (test_sta_flag(sta, WLAN_STA_ASSOC)) | |
1847 | sinfo->sta_flags.set |= BIT(NL80211_STA_FLAG_ASSOCIATED); | |
1848 | if (test_sta_flag(sta, WLAN_STA_TDLS_PEER)) | |
1849 | sinfo->sta_flags.set |= BIT(NL80211_STA_FLAG_TDLS_PEER); | |
1850 | ||
1851 | /* check if the driver has a SW RC implementation */ | |
1852 | if (ref && ref->ops->get_expected_throughput) | |
1853 | thr = ref->ops->get_expected_throughput(sta->rate_ctrl_priv); | |
1854 | else | |
1855 | thr = drv_get_expected_throughput(local, &sta->sta); | |
1856 | ||
1857 | if (thr != 0) { | |
1858 | sinfo->filled |= STATION_INFO_EXPECTED_THROUGHPUT; | |
1859 | sinfo->expected_throughput = thr; | |
1860 | } | |
1861 | } |