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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 | ||
97f97b1f | 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 EP |
101 | |
102 | /* | |
103 | * At this point, when being called as call_rcu callback, | |
104 | * neither mac80211 nor the driver can reference this | |
105 | * sta struct any more except by still existing timers | |
106 | * associated with this station that we clean up below. | |
051007d9 JB |
107 | * |
108 | * Note though that this still uses the sdata and even | |
109 | * calls the driver in AP and mesh mode, so interfaces | |
110 | * of those types mush use call sta_info_flush_cleanup() | |
111 | * (typically via sta_info_flush()) before deconfiguring | |
112 | * the driver. | |
113 | * | |
114 | * In station mode, nothing happens here so it doesn't | |
115 | * have to (and doesn't) do that, this is intentional to | |
116 | * speed up roaming. | |
b22cfcfc EP |
117 | */ |
118 | ||
119 | if (test_sta_flag(sta, WLAN_STA_PS_STA)) { | |
d012a605 MP |
120 | if (sta->sdata->vif.type == NL80211_IFTYPE_AP || |
121 | sta->sdata->vif.type == NL80211_IFTYPE_AP_VLAN) | |
122 | ps = &sdata->bss->ps; | |
3f52b7e3 MP |
123 | else if (ieee80211_vif_is_mesh(&sdata->vif)) |
124 | ps = &sdata->u.mesh.ps; | |
d012a605 MP |
125 | else |
126 | return; | |
b22cfcfc EP |
127 | |
128 | clear_sta_flag(sta, WLAN_STA_PS_STA); | |
129 | ||
d012a605 | 130 | atomic_dec(&ps->num_sta_ps); |
b22cfcfc EP |
131 | sta_info_recalc_tim(sta); |
132 | } | |
133 | ||
134 | for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) { | |
135 | local->total_ps_buffered -= skb_queue_len(&sta->ps_tx_buf[ac]); | |
1f98ab7f FF |
136 | ieee80211_purge_tx_queue(&local->hw, &sta->ps_tx_buf[ac]); |
137 | ieee80211_purge_tx_queue(&local->hw, &sta->tx_filtered[ac]); | |
b22cfcfc EP |
138 | } |
139 | ||
45b5028e TP |
140 | if (ieee80211_vif_is_mesh(&sdata->vif)) |
141 | mesh_sta_cleanup(sta); | |
b22cfcfc EP |
142 | |
143 | cancel_work_sync(&sta->drv_unblock_wk); | |
144 | ||
145 | /* | |
146 | * Destroy aggregation state here. It would be nice to wait for the | |
147 | * driver to finish aggregation stop and then clean up, but for now | |
148 | * drivers have to handle aggregation stop being requested, followed | |
149 | * directly by station destruction. | |
150 | */ | |
5a306f58 | 151 | for (i = 0; i < IEEE80211_NUM_TIDS; i++) { |
661eb381 | 152 | kfree(sta->ampdu_mlme.tid_start_tx[i]); |
b22cfcfc EP |
153 | tid_tx = rcu_dereference_raw(sta->ampdu_mlme.tid_tx[i]); |
154 | if (!tid_tx) | |
155 | continue; | |
1f98ab7f | 156 | ieee80211_purge_tx_queue(&local->hw, &tid_tx->pending); |
b22cfcfc EP |
157 | kfree(tid_tx); |
158 | } | |
159 | ||
160 | sta_info_free(local, sta); | |
161 | } | |
162 | ||
97f97b1f JB |
163 | void ieee80211_cleanup_sdata_stas(struct ieee80211_sub_if_data *sdata) |
164 | { | |
165 | struct sta_info *sta; | |
166 | ||
167 | spin_lock_bh(&sdata->cleanup_stations_lock); | |
168 | while (!list_empty(&sdata->cleanup_stations)) { | |
169 | sta = list_first_entry(&sdata->cleanup_stations, | |
170 | struct sta_info, list); | |
171 | list_del(&sta->list); | |
172 | spin_unlock_bh(&sdata->cleanup_stations_lock); | |
173 | ||
174 | cleanup_single_sta(sta); | |
175 | ||
176 | spin_lock_bh(&sdata->cleanup_stations_lock); | |
177 | } | |
178 | ||
179 | spin_unlock_bh(&sdata->cleanup_stations_lock); | |
180 | } | |
181 | ||
b22cfcfc EP |
182 | static void free_sta_rcu(struct rcu_head *h) |
183 | { | |
184 | struct sta_info *sta = container_of(h, struct sta_info, rcu_head); | |
97f97b1f | 185 | struct ieee80211_sub_if_data *sdata = sta->sdata; |
b22cfcfc | 186 | |
97f97b1f JB |
187 | spin_lock(&sdata->cleanup_stations_lock); |
188 | list_add_tail(&sta->list, &sdata->cleanup_stations); | |
189 | spin_unlock(&sdata->cleanup_stations_lock); | |
190 | ||
191 | ieee80211_queue_work(&sdata->local->hw, &sdata->cleanup_stations_wk); | |
b22cfcfc EP |
192 | } |
193 | ||
d0709a65 | 194 | /* protected by RCU */ |
abe60632 JB |
195 | struct sta_info *sta_info_get(struct ieee80211_sub_if_data *sdata, |
196 | const u8 *addr) | |
f0706e82 | 197 | { |
abe60632 | 198 | struct ieee80211_local *local = sdata->local; |
f0706e82 JB |
199 | struct sta_info *sta; |
200 | ||
0379185b | 201 | sta = rcu_dereference_check(local->sta_hash[STA_HASH(addr)], |
0379185b | 202 | lockdep_is_held(&local->sta_mtx)); |
f0706e82 | 203 | while (sta) { |
abe60632 | 204 | if (sta->sdata == sdata && |
b203ca39 | 205 | ether_addr_equal(sta->sta.addr, addr)) |
f0706e82 | 206 | break; |
0379185b | 207 | sta = rcu_dereference_check(sta->hnext, |
0379185b | 208 | lockdep_is_held(&local->sta_mtx)); |
f0706e82 | 209 | } |
43ba7e95 JB |
210 | return sta; |
211 | } | |
212 | ||
0e5ded5a FF |
213 | /* |
214 | * Get sta info either from the specified interface | |
215 | * or from one of its vlans | |
216 | */ | |
217 | struct sta_info *sta_info_get_bss(struct ieee80211_sub_if_data *sdata, | |
218 | const u8 *addr) | |
219 | { | |
220 | struct ieee80211_local *local = sdata->local; | |
221 | struct sta_info *sta; | |
222 | ||
0379185b | 223 | sta = rcu_dereference_check(local->sta_hash[STA_HASH(addr)], |
0379185b | 224 | lockdep_is_held(&local->sta_mtx)); |
0e5ded5a FF |
225 | while (sta) { |
226 | if ((sta->sdata == sdata || | |
a2c1e3da | 227 | (sta->sdata->bss && sta->sdata->bss == sdata->bss)) && |
b203ca39 | 228 | ether_addr_equal(sta->sta.addr, addr)) |
0e5ded5a | 229 | break; |
0379185b | 230 | sta = rcu_dereference_check(sta->hnext, |
0379185b | 231 | lockdep_is_held(&local->sta_mtx)); |
0e5ded5a FF |
232 | } |
233 | return sta; | |
234 | } | |
235 | ||
3b53fde8 JB |
236 | struct sta_info *sta_info_get_by_idx(struct ieee80211_sub_if_data *sdata, |
237 | int idx) | |
ee385855 | 238 | { |
3b53fde8 | 239 | struct ieee80211_local *local = sdata->local; |
ee385855 LCC |
240 | struct sta_info *sta; |
241 | int i = 0; | |
242 | ||
d0709a65 | 243 | list_for_each_entry_rcu(sta, &local->sta_list, list) { |
3b53fde8 | 244 | if (sdata != sta->sdata) |
2a8ca29a | 245 | continue; |
ee385855 LCC |
246 | if (i < idx) { |
247 | ++i; | |
248 | continue; | |
ee385855 | 249 | } |
2a8ca29a | 250 | return sta; |
ee385855 | 251 | } |
ee385855 LCC |
252 | |
253 | return NULL; | |
254 | } | |
f0706e82 | 255 | |
93e5deb1 | 256 | /** |
d9a7ddb0 | 257 | * sta_info_free - free STA |
93e5deb1 | 258 | * |
6ef307bc | 259 | * @local: pointer to the global information |
93e5deb1 JB |
260 | * @sta: STA info to free |
261 | * | |
262 | * This function must undo everything done by sta_info_alloc() | |
d9a7ddb0 JB |
263 | * that may happen before sta_info_insert(). It may only be |
264 | * called when sta_info_insert() has not been attempted (and | |
265 | * if that fails, the station is freed anyway.) | |
93e5deb1 | 266 | */ |
d9a7ddb0 | 267 | void sta_info_free(struct ieee80211_local *local, struct sta_info *sta) |
93e5deb1 | 268 | { |
889cbb91 | 269 | if (sta->rate_ctrl) |
af65cd96 | 270 | rate_control_free_sta(sta); |
93e5deb1 | 271 | |
bdcbd8e0 | 272 | sta_dbg(sta->sdata, "Destroyed STA %pM\n", sta->sta.addr); |
93e5deb1 JB |
273 | |
274 | kfree(sta); | |
275 | } | |
276 | ||
4d33960b | 277 | /* Caller must hold local->sta_mtx */ |
d0709a65 JB |
278 | static void sta_info_hash_add(struct ieee80211_local *local, |
279 | struct sta_info *sta) | |
f0706e82 | 280 | { |
4d33960b | 281 | lockdep_assert_held(&local->sta_mtx); |
17741cdc | 282 | sta->hnext = local->sta_hash[STA_HASH(sta->sta.addr)]; |
cf778b00 | 283 | rcu_assign_pointer(local->sta_hash[STA_HASH(sta->sta.addr)], sta); |
f0706e82 | 284 | } |
f0706e82 | 285 | |
af818581 JB |
286 | static void sta_unblock(struct work_struct *wk) |
287 | { | |
288 | struct sta_info *sta; | |
289 | ||
290 | sta = container_of(wk, struct sta_info, drv_unblock_wk); | |
291 | ||
292 | if (sta->dead) | |
293 | return; | |
294 | ||
54420473 HS |
295 | if (!test_sta_flag(sta, WLAN_STA_PS_STA)) { |
296 | local_bh_disable(); | |
af818581 | 297 | ieee80211_sta_ps_deliver_wakeup(sta); |
54420473 HS |
298 | local_bh_enable(); |
299 | } else if (test_and_clear_sta_flag(sta, WLAN_STA_PSPOLL)) { | |
c2c98fde | 300 | clear_sta_flag(sta, WLAN_STA_PS_DRIVER); |
ce662b44 JB |
301 | |
302 | local_bh_disable(); | |
af818581 | 303 | ieee80211_sta_ps_deliver_poll_response(sta); |
ce662b44 | 304 | local_bh_enable(); |
c2c98fde JB |
305 | } else if (test_and_clear_sta_flag(sta, WLAN_STA_UAPSD)) { |
306 | clear_sta_flag(sta, WLAN_STA_PS_DRIVER); | |
ce662b44 JB |
307 | |
308 | local_bh_disable(); | |
47086fc5 | 309 | ieee80211_sta_ps_deliver_uapsd(sta); |
ce662b44 | 310 | local_bh_enable(); |
50a9432d | 311 | } else |
c2c98fde | 312 | clear_sta_flag(sta, WLAN_STA_PS_DRIVER); |
af818581 JB |
313 | } |
314 | ||
af65cd96 JB |
315 | static int sta_prepare_rate_control(struct ieee80211_local *local, |
316 | struct sta_info *sta, gfp_t gfp) | |
317 | { | |
318 | if (local->hw.flags & IEEE80211_HW_HAS_RATE_CONTROL) | |
319 | return 0; | |
320 | ||
889cbb91 | 321 | sta->rate_ctrl = local->rate_ctrl; |
af65cd96 JB |
322 | sta->rate_ctrl_priv = rate_control_alloc_sta(sta->rate_ctrl, |
323 | &sta->sta, gfp); | |
889cbb91 | 324 | if (!sta->rate_ctrl_priv) |
af65cd96 | 325 | return -ENOMEM; |
af65cd96 JB |
326 | |
327 | return 0; | |
328 | } | |
329 | ||
73651ee6 | 330 | struct sta_info *sta_info_alloc(struct ieee80211_sub_if_data *sdata, |
56544160 | 331 | const u8 *addr, gfp_t gfp) |
f0706e82 | 332 | { |
d0709a65 | 333 | struct ieee80211_local *local = sdata->local; |
f0706e82 | 334 | struct sta_info *sta; |
ebe27c91 | 335 | struct timespec uptime; |
16c5f15c | 336 | int i; |
f0706e82 | 337 | |
17741cdc | 338 | sta = kzalloc(sizeof(*sta) + local->hw.sta_data_size, gfp); |
f0706e82 | 339 | if (!sta) |
73651ee6 | 340 | return NULL; |
f0706e82 | 341 | |
07346f81 | 342 | spin_lock_init(&sta->lock); |
af818581 | 343 | INIT_WORK(&sta->drv_unblock_wk, sta_unblock); |
67c282c0 | 344 | INIT_WORK(&sta->ampdu_mlme.work, ieee80211_ba_session_work); |
a93e3644 | 345 | mutex_init(&sta->ampdu_mlme.mtx); |
87f59c70 TP |
346 | #ifdef CONFIG_MAC80211_MESH |
347 | if (ieee80211_vif_is_mesh(&sdata->vif) && | |
348 | !sdata->u.mesh.user_mpm) | |
349 | init_timer(&sta->plink_timer); | |
6c7c4cbf | 350 | sta->nonpeer_pm = NL80211_MESH_POWER_ACTIVE; |
87f59c70 | 351 | #endif |
07346f81 | 352 | |
17741cdc | 353 | memcpy(sta->sta.addr, addr, ETH_ALEN); |
d0709a65 JB |
354 | sta->local = local; |
355 | sta->sdata = sdata; | |
8bc8aecd | 356 | sta->last_rx = jiffies; |
f0706e82 | 357 | |
71ec375c JB |
358 | sta->sta_state = IEEE80211_STA_NONE; |
359 | ||
ebe27c91 MSS |
360 | do_posix_clock_monotonic_gettime(&uptime); |
361 | sta->last_connected = uptime.tv_sec; | |
541a45a1 | 362 | ewma_init(&sta->avg_signal, 1024, 8); |
ef0621e8 FF |
363 | for (i = 0; i < ARRAY_SIZE(sta->chain_signal_avg); i++) |
364 | ewma_init(&sta->chain_signal_avg[i], 1024, 8); | |
541a45a1 | 365 | |
af65cd96 | 366 | if (sta_prepare_rate_control(local, sta, gfp)) { |
f0706e82 | 367 | kfree(sta); |
73651ee6 | 368 | return NULL; |
f0706e82 JB |
369 | } |
370 | ||
5a306f58 | 371 | for (i = 0; i < IEEE80211_NUM_TIDS; i++) { |
a622ab72 JB |
372 | /* |
373 | * timer_to_tid must be initialized with identity mapping | |
374 | * to enable session_timer's data differentiation. See | |
375 | * sta_rx_agg_session_timer_expired for usage. | |
376 | */ | |
16c5f15c | 377 | sta->timer_to_tid[i] = i; |
16c5f15c | 378 | } |
948d887d JB |
379 | for (i = 0; i < IEEE80211_NUM_ACS; i++) { |
380 | skb_queue_head_init(&sta->ps_tx_buf[i]); | |
381 | skb_queue_head_init(&sta->tx_filtered[i]); | |
382 | } | |
73651ee6 | 383 | |
5a306f58 | 384 | for (i = 0; i < IEEE80211_NUM_TIDS; i++) |
4be929be | 385 | sta->last_seq_ctrl[i] = cpu_to_le16(USHRT_MAX); |
cccaec98 | 386 | |
af0ed69b | 387 | sta->sta.smps_mode = IEEE80211_SMPS_OFF; |
687da132 EG |
388 | if (sdata->vif.type == NL80211_IFTYPE_AP || |
389 | sdata->vif.type == NL80211_IFTYPE_AP_VLAN) { | |
390 | struct ieee80211_supported_band *sband = | |
391 | local->hw.wiphy->bands[ieee80211_get_sdata_band(sdata)]; | |
392 | u8 smps = (sband->ht_cap.cap & IEEE80211_HT_CAP_SM_PS) >> | |
393 | IEEE80211_HT_CAP_SM_PS_SHIFT; | |
394 | /* | |
395 | * Assume that hostapd advertises our caps in the beacon and | |
396 | * this is the known_smps_mode for a station that just assciated | |
397 | */ | |
398 | switch (smps) { | |
399 | case WLAN_HT_SMPS_CONTROL_DISABLED: | |
400 | sta->known_smps_mode = IEEE80211_SMPS_OFF; | |
401 | break; | |
402 | case WLAN_HT_SMPS_CONTROL_STATIC: | |
403 | sta->known_smps_mode = IEEE80211_SMPS_STATIC; | |
404 | break; | |
405 | case WLAN_HT_SMPS_CONTROL_DYNAMIC: | |
406 | sta->known_smps_mode = IEEE80211_SMPS_DYNAMIC; | |
407 | break; | |
408 | default: | |
409 | WARN_ON(1); | |
410 | } | |
411 | } | |
af0ed69b | 412 | |
bdcbd8e0 | 413 | sta_dbg(sdata, "Allocated STA %pM\n", sta->sta.addr); |
73651ee6 JB |
414 | |
415 | return sta; | |
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 | /* notify driver */ |
495 | err = sta_info_insert_drv_state(local, sdata, sta); | |
496 | if (err) | |
497 | goto out_err; | |
4d33960b | 498 | |
7852e361 JB |
499 | local->num_sta++; |
500 | local->sta_generation++; | |
501 | smp_mb(); | |
4d33960b | 502 | |
7852e361 JB |
503 | /* make the station visible */ |
504 | sta_info_hash_add(local, sta); | |
83d5cc01 | 505 | |
794454ce | 506 | list_add_rcu(&sta->list, &local->sta_list); |
4d33960b | 507 | |
7852e361 | 508 | set_sta_flag(sta, WLAN_STA_INSERTED); |
4d33960b | 509 | |
21f659bf | 510 | ieee80211_recalc_min_chandef(sdata); |
7852e361 JB |
511 | ieee80211_sta_debugfs_add(sta); |
512 | rate_control_add_sta_debugfs(sta); | |
4d33960b | 513 | |
7852e361 JB |
514 | memset(&sinfo, 0, sizeof(sinfo)); |
515 | sinfo.filled = 0; | |
516 | sinfo.generation = local->sta_generation; | |
517 | cfg80211_new_sta(sdata->dev, sta->sta.addr, &sinfo, GFP_KERNEL); | |
d0709a65 | 518 | |
bdcbd8e0 | 519 | sta_dbg(sdata, "Inserted STA %pM\n", sta->sta.addr); |
f0706e82 | 520 | |
34e89507 JB |
521 | /* move reference to rcu-protected */ |
522 | rcu_read_lock(); | |
523 | mutex_unlock(&local->sta_mtx); | |
e9f207f0 | 524 | |
73651ee6 JB |
525 | if (ieee80211_vif_is_mesh(&sdata->vif)) |
526 | mesh_accept_plinks_update(sdata); | |
527 | ||
8c71df7a | 528 | return 0; |
4d33960b JB |
529 | out_err: |
530 | mutex_unlock(&local->sta_mtx); | |
531 | rcu_read_lock(); | |
532 | return err; | |
8c71df7a GE |
533 | } |
534 | ||
535 | int sta_info_insert_rcu(struct sta_info *sta) __acquires(RCU) | |
536 | { | |
537 | struct ieee80211_local *local = sta->local; | |
8c71df7a GE |
538 | int err = 0; |
539 | ||
4d33960b JB |
540 | might_sleep(); |
541 | ||
8c71df7a GE |
542 | err = sta_info_insert_check(sta); |
543 | if (err) { | |
544 | rcu_read_lock(); | |
545 | goto out_free; | |
546 | } | |
547 | ||
8c71df7a GE |
548 | mutex_lock(&local->sta_mtx); |
549 | ||
4d33960b | 550 | err = sta_info_insert_finish(sta); |
8c71df7a GE |
551 | if (err) |
552 | goto out_free; | |
553 | ||
73651ee6 | 554 | return 0; |
93e5deb1 JB |
555 | out_free: |
556 | BUG_ON(!err); | |
d9a7ddb0 | 557 | sta_info_free(local, sta); |
93e5deb1 | 558 | return err; |
f0706e82 JB |
559 | } |
560 | ||
34e89507 JB |
561 | int sta_info_insert(struct sta_info *sta) |
562 | { | |
563 | int err = sta_info_insert_rcu(sta); | |
564 | ||
565 | rcu_read_unlock(); | |
566 | ||
567 | return err; | |
568 | } | |
569 | ||
d012a605 | 570 | static inline void __bss_tim_set(u8 *tim, u16 id) |
004c872e JB |
571 | { |
572 | /* | |
573 | * This format has been mandated by the IEEE specifications, | |
574 | * so this line may not be changed to use the __set_bit() format. | |
575 | */ | |
d012a605 | 576 | tim[id / 8] |= (1 << (id % 8)); |
004c872e JB |
577 | } |
578 | ||
d012a605 | 579 | static inline void __bss_tim_clear(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 __clear_bit() format. | |
584 | */ | |
d012a605 | 585 | tim[id / 8] &= ~(1 << (id % 8)); |
004c872e JB |
586 | } |
587 | ||
3d5839b6 IP |
588 | static inline bool __bss_tim_get(u8 *tim, u16 id) |
589 | { | |
590 | /* | |
591 | * This format has been mandated by the IEEE specifications, | |
592 | * so this line may not be changed to use the test_bit() format. | |
593 | */ | |
594 | return tim[id / 8] & (1 << (id % 8)); | |
595 | } | |
596 | ||
948d887d | 597 | static unsigned long ieee80211_tids_for_ac(int ac) |
004c872e | 598 | { |
948d887d JB |
599 | /* If we ever support TIDs > 7, this obviously needs to be adjusted */ |
600 | switch (ac) { | |
601 | case IEEE80211_AC_VO: | |
602 | return BIT(6) | BIT(7); | |
603 | case IEEE80211_AC_VI: | |
604 | return BIT(4) | BIT(5); | |
605 | case IEEE80211_AC_BE: | |
606 | return BIT(0) | BIT(3); | |
607 | case IEEE80211_AC_BK: | |
608 | return BIT(1) | BIT(2); | |
609 | default: | |
610 | WARN_ON(1); | |
611 | return 0; | |
d0709a65 | 612 | } |
004c872e JB |
613 | } |
614 | ||
c868cb35 | 615 | void sta_info_recalc_tim(struct sta_info *sta) |
004c872e | 616 | { |
c868cb35 | 617 | struct ieee80211_local *local = sta->local; |
d012a605 | 618 | struct ps_data *ps; |
948d887d JB |
619 | bool indicate_tim = false; |
620 | u8 ignore_for_tim = sta->sta.uapsd_queues; | |
621 | int ac; | |
d012a605 MP |
622 | u16 id; |
623 | ||
624 | if (sta->sdata->vif.type == NL80211_IFTYPE_AP || | |
625 | sta->sdata->vif.type == NL80211_IFTYPE_AP_VLAN) { | |
626 | if (WARN_ON_ONCE(!sta->sdata->bss)) | |
627 | return; | |
004c872e | 628 | |
d012a605 MP |
629 | ps = &sta->sdata->bss->ps; |
630 | id = sta->sta.aid; | |
3f52b7e3 MP |
631 | #ifdef CONFIG_MAC80211_MESH |
632 | } else if (ieee80211_vif_is_mesh(&sta->sdata->vif)) { | |
633 | ps = &sta->sdata->u.mesh.ps; | |
204d1304 | 634 | /* TIM map only for 1 <= PLID <= IEEE80211_MAX_AID */ |
6f101ef0 | 635 | id = sta->plid % (IEEE80211_MAX_AID + 1); |
3f52b7e3 | 636 | #endif |
d012a605 | 637 | } else { |
c868cb35 | 638 | return; |
d012a605 | 639 | } |
3e122be0 | 640 | |
c868cb35 JB |
641 | /* No need to do anything if the driver does all */ |
642 | if (local->hw.flags & IEEE80211_HW_AP_LINK_PS) | |
643 | return; | |
004c872e | 644 | |
c868cb35 JB |
645 | if (sta->dead) |
646 | goto done; | |
3e122be0 | 647 | |
948d887d JB |
648 | /* |
649 | * If all ACs are delivery-enabled then we should build | |
650 | * the TIM bit for all ACs anyway; if only some are then | |
651 | * we ignore those and build the TIM bit using only the | |
652 | * non-enabled ones. | |
653 | */ | |
654 | if (ignore_for_tim == BIT(IEEE80211_NUM_ACS) - 1) | |
655 | ignore_for_tim = 0; | |
656 | ||
657 | for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) { | |
658 | unsigned long tids; | |
3e122be0 | 659 | |
948d887d JB |
660 | if (ignore_for_tim & BIT(ac)) |
661 | continue; | |
662 | ||
663 | indicate_tim |= !skb_queue_empty(&sta->tx_filtered[ac]) || | |
664 | !skb_queue_empty(&sta->ps_tx_buf[ac]); | |
665 | if (indicate_tim) | |
666 | break; | |
3e122be0 | 667 | |
948d887d JB |
668 | tids = ieee80211_tids_for_ac(ac); |
669 | ||
670 | indicate_tim |= | |
671 | sta->driver_buffered_tids & tids; | |
d0709a65 | 672 | } |
004c872e | 673 | |
c868cb35 | 674 | done: |
65f704a5 | 675 | spin_lock_bh(&local->tim_lock); |
004c872e | 676 | |
3d5839b6 IP |
677 | if (indicate_tim == __bss_tim_get(ps->tim, id)) |
678 | goto out_unlock; | |
679 | ||
948d887d | 680 | if (indicate_tim) |
d012a605 | 681 | __bss_tim_set(ps->tim, id); |
c868cb35 | 682 | else |
d012a605 | 683 | __bss_tim_clear(ps->tim, id); |
004c872e | 684 | |
c868cb35 JB |
685 | if (local->ops->set_tim) { |
686 | local->tim_in_locked_section = true; | |
948d887d | 687 | drv_set_tim(local, &sta->sta, indicate_tim); |
c868cb35 JB |
688 | local->tim_in_locked_section = false; |
689 | } | |
3e122be0 | 690 | |
3d5839b6 | 691 | out_unlock: |
65f704a5 | 692 | spin_unlock_bh(&local->tim_lock); |
004c872e JB |
693 | } |
694 | ||
cd0b8d89 | 695 | static bool sta_info_buffer_expired(struct sta_info *sta, struct sk_buff *skb) |
f0706e82 | 696 | { |
e039fa4a | 697 | struct ieee80211_tx_info *info; |
f0706e82 JB |
698 | int timeout; |
699 | ||
700 | if (!skb) | |
cd0b8d89 | 701 | return false; |
f0706e82 | 702 | |
e039fa4a | 703 | info = IEEE80211_SKB_CB(skb); |
f0706e82 JB |
704 | |
705 | /* Timeout: (2 * listen_interval * beacon_int * 1024 / 1000000) sec */ | |
57c4d7b4 JB |
706 | timeout = (sta->listen_interval * |
707 | sta->sdata->vif.bss_conf.beacon_int * | |
708 | 32 / 15625) * HZ; | |
f0706e82 JB |
709 | if (timeout < STA_TX_BUFFER_EXPIRE) |
710 | timeout = STA_TX_BUFFER_EXPIRE; | |
e039fa4a | 711 | return time_after(jiffies, info->control.jiffies + timeout); |
f0706e82 JB |
712 | } |
713 | ||
714 | ||
948d887d JB |
715 | static bool sta_info_cleanup_expire_buffered_ac(struct ieee80211_local *local, |
716 | struct sta_info *sta, int ac) | |
f0706e82 JB |
717 | { |
718 | unsigned long flags; | |
719 | struct sk_buff *skb; | |
720 | ||
60750397 JB |
721 | /* |
722 | * First check for frames that should expire on the filtered | |
723 | * queue. Frames here were rejected by the driver and are on | |
724 | * a separate queue to avoid reordering with normal PS-buffered | |
725 | * frames. They also aren't accounted for right now in the | |
726 | * total_ps_buffered counter. | |
727 | */ | |
728 | for (;;) { | |
948d887d JB |
729 | spin_lock_irqsave(&sta->tx_filtered[ac].lock, flags); |
730 | skb = skb_peek(&sta->tx_filtered[ac]); | |
60750397 | 731 | if (sta_info_buffer_expired(sta, skb)) |
948d887d | 732 | skb = __skb_dequeue(&sta->tx_filtered[ac]); |
60750397 JB |
733 | else |
734 | skb = NULL; | |
948d887d | 735 | spin_unlock_irqrestore(&sta->tx_filtered[ac].lock, flags); |
60750397 JB |
736 | |
737 | /* | |
738 | * Frames are queued in order, so if this one | |
739 | * hasn't expired yet we can stop testing. If | |
740 | * we actually reached the end of the queue we | |
741 | * also need to stop, of course. | |
742 | */ | |
743 | if (!skb) | |
744 | break; | |
d4fa14cd | 745 | ieee80211_free_txskb(&local->hw, skb); |
60750397 JB |
746 | } |
747 | ||
748 | /* | |
749 | * Now also check the normal PS-buffered queue, this will | |
750 | * only find something if the filtered queue was emptied | |
751 | * since the filtered frames are all before the normal PS | |
752 | * buffered frames. | |
753 | */ | |
f0706e82 | 754 | for (;;) { |
948d887d JB |
755 | spin_lock_irqsave(&sta->ps_tx_buf[ac].lock, flags); |
756 | skb = skb_peek(&sta->ps_tx_buf[ac]); | |
57c4d7b4 | 757 | if (sta_info_buffer_expired(sta, skb)) |
948d887d | 758 | skb = __skb_dequeue(&sta->ps_tx_buf[ac]); |
836341a7 | 759 | else |
f0706e82 | 760 | skb = NULL; |
948d887d | 761 | spin_unlock_irqrestore(&sta->ps_tx_buf[ac].lock, flags); |
f0706e82 | 762 | |
60750397 JB |
763 | /* |
764 | * frames are queued in order, so if this one | |
765 | * hasn't expired yet (or we reached the end of | |
766 | * the queue) we can stop testing | |
767 | */ | |
836341a7 | 768 | if (!skb) |
f0706e82 | 769 | break; |
836341a7 | 770 | |
836341a7 | 771 | local->total_ps_buffered--; |
bdcbd8e0 JB |
772 | ps_dbg(sta->sdata, "Buffered frame expired (STA %pM)\n", |
773 | sta->sta.addr); | |
d4fa14cd | 774 | ieee80211_free_txskb(&local->hw, skb); |
f0706e82 | 775 | } |
3393a608 | 776 | |
60750397 JB |
777 | /* |
778 | * Finally, recalculate the TIM bit for this station -- it might | |
779 | * now be clear because the station was too slow to retrieve its | |
780 | * frames. | |
781 | */ | |
782 | sta_info_recalc_tim(sta); | |
783 | ||
784 | /* | |
785 | * Return whether there are any frames still buffered, this is | |
786 | * used to check whether the cleanup timer still needs to run, | |
787 | * if there are no frames we don't need to rearm the timer. | |
788 | */ | |
948d887d JB |
789 | return !(skb_queue_empty(&sta->ps_tx_buf[ac]) && |
790 | skb_queue_empty(&sta->tx_filtered[ac])); | |
791 | } | |
792 | ||
793 | static bool sta_info_cleanup_expire_buffered(struct ieee80211_local *local, | |
794 | struct sta_info *sta) | |
795 | { | |
796 | bool have_buffered = false; | |
797 | int ac; | |
798 | ||
3f52b7e3 MP |
799 | /* This is only necessary for stations on BSS/MBSS interfaces */ |
800 | if (!sta->sdata->bss && | |
801 | !ieee80211_vif_is_mesh(&sta->sdata->vif)) | |
948d887d JB |
802 | return false; |
803 | ||
804 | for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) | |
805 | have_buffered |= | |
806 | sta_info_cleanup_expire_buffered_ac(local, sta, ac); | |
807 | ||
808 | return have_buffered; | |
f0706e82 JB |
809 | } |
810 | ||
83d5cc01 | 811 | int __must_check __sta_info_destroy(struct sta_info *sta) |
f0706e82 | 812 | { |
34e89507 JB |
813 | struct ieee80211_local *local; |
814 | struct ieee80211_sub_if_data *sdata; | |
6d10e46b | 815 | int ret; |
f0706e82 | 816 | |
34e89507 | 817 | might_sleep(); |
f0706e82 | 818 | |
34e89507 JB |
819 | if (!sta) |
820 | return -ENOENT; | |
5bb644a0 | 821 | |
34e89507 JB |
822 | local = sta->local; |
823 | sdata = sta->sdata; | |
f0706e82 | 824 | |
83d5cc01 JB |
825 | lockdep_assert_held(&local->sta_mtx); |
826 | ||
098a6070 JB |
827 | /* |
828 | * Before removing the station from the driver and | |
829 | * rate control, it might still start new aggregation | |
830 | * sessions -- block that to make sure the tear-down | |
831 | * will be sufficient. | |
832 | */ | |
c2c98fde | 833 | set_sta_flag(sta, WLAN_STA_BLOCK_BA); |
c82c4a80 | 834 | ieee80211_sta_tear_down_BA_sessions(sta, AGG_STOP_DESTROY_STA); |
098a6070 | 835 | |
34e89507 | 836 | ret = sta_info_hash_del(local, sta); |
34e89507 JB |
837 | if (ret) |
838 | return ret; | |
839 | ||
794454ce | 840 | list_del_rcu(&sta->list); |
4d33960b | 841 | |
6d10e46b JB |
842 | /* this always calls synchronize_net() */ |
843 | ieee80211_free_sta_keys(local, sta); | |
34e89507 JB |
844 | |
845 | sta->dead = true; | |
846 | ||
34e89507 JB |
847 | local->num_sta--; |
848 | local->sta_generation++; | |
849 | ||
850 | if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) | |
a9b3cd7f | 851 | RCU_INIT_POINTER(sdata->u.vlan.sta, NULL); |
34e89507 | 852 | |
83d5cc01 | 853 | while (sta->sta_state > IEEE80211_STA_NONE) { |
f09603a2 JB |
854 | ret = sta_info_move_state(sta, sta->sta_state - 1); |
855 | if (ret) { | |
83d5cc01 JB |
856 | WARN_ON_ONCE(1); |
857 | break; | |
858 | } | |
859 | } | |
d9a7ddb0 | 860 | |
f09603a2 | 861 | if (sta->uploaded) { |
f09603a2 JB |
862 | ret = drv_sta_state(local, sdata, sta, IEEE80211_STA_NONE, |
863 | IEEE80211_STA_NOTEXIST); | |
864 | WARN_ON_ONCE(ret != 0); | |
865 | } | |
34e89507 | 866 | |
bdcbd8e0 JB |
867 | sta_dbg(sdata, "Removed STA %pM\n", sta->sta.addr); |
868 | ||
ec15e68b JM |
869 | cfg80211_del_sta(sdata->dev, sta->sta.addr, GFP_KERNEL); |
870 | ||
34e89507 JB |
871 | rate_control_remove_sta_debugfs(sta); |
872 | ieee80211_sta_debugfs_remove(sta); | |
21f659bf | 873 | ieee80211_recalc_min_chandef(sdata); |
34e89507 | 874 | |
b22cfcfc | 875 | call_rcu(&sta->rcu_head, free_sta_rcu); |
34e89507 JB |
876 | |
877 | return 0; | |
4d6141c3 JS |
878 | } |
879 | ||
34e89507 | 880 | int sta_info_destroy_addr(struct ieee80211_sub_if_data *sdata, const u8 *addr) |
4d6141c3 | 881 | { |
34e89507 JB |
882 | struct sta_info *sta; |
883 | int ret; | |
4d6141c3 | 884 | |
34e89507 | 885 | mutex_lock(&sdata->local->sta_mtx); |
7852e361 | 886 | sta = sta_info_get(sdata, addr); |
34e89507 JB |
887 | ret = __sta_info_destroy(sta); |
888 | mutex_unlock(&sdata->local->sta_mtx); | |
4d6141c3 JS |
889 | |
890 | return ret; | |
891 | } | |
892 | ||
34e89507 JB |
893 | int sta_info_destroy_addr_bss(struct ieee80211_sub_if_data *sdata, |
894 | const u8 *addr) | |
e9f207f0 | 895 | { |
34e89507 JB |
896 | struct sta_info *sta; |
897 | int ret; | |
e9f207f0 | 898 | |
34e89507 | 899 | mutex_lock(&sdata->local->sta_mtx); |
7852e361 | 900 | sta = sta_info_get_bss(sdata, addr); |
34e89507 JB |
901 | ret = __sta_info_destroy(sta); |
902 | mutex_unlock(&sdata->local->sta_mtx); | |
d0709a65 | 903 | |
34e89507 JB |
904 | return ret; |
905 | } | |
e9f207f0 | 906 | |
34e89507 JB |
907 | static void sta_info_cleanup(unsigned long data) |
908 | { | |
909 | struct ieee80211_local *local = (struct ieee80211_local *) data; | |
910 | struct sta_info *sta; | |
3393a608 | 911 | bool timer_needed = false; |
34e89507 JB |
912 | |
913 | rcu_read_lock(); | |
914 | list_for_each_entry_rcu(sta, &local->sta_list, list) | |
3393a608 JO |
915 | if (sta_info_cleanup_expire_buffered(local, sta)) |
916 | timer_needed = true; | |
34e89507 | 917 | rcu_read_unlock(); |
e9f207f0 | 918 | |
34e89507 JB |
919 | if (local->quiescing) |
920 | return; | |
d0709a65 | 921 | |
3393a608 JO |
922 | if (!timer_needed) |
923 | return; | |
924 | ||
26d59535 JB |
925 | mod_timer(&local->sta_cleanup, |
926 | round_jiffies(jiffies + STA_INFO_CLEANUP_INTERVAL)); | |
e9f207f0 | 927 | } |
e9f207f0 | 928 | |
f0706e82 JB |
929 | void sta_info_init(struct ieee80211_local *local) |
930 | { | |
4d33960b | 931 | spin_lock_init(&local->tim_lock); |
34e89507 | 932 | mutex_init(&local->sta_mtx); |
f0706e82 | 933 | INIT_LIST_HEAD(&local->sta_list); |
f0706e82 | 934 | |
b24b8a24 PE |
935 | setup_timer(&local->sta_cleanup, sta_info_cleanup, |
936 | (unsigned long)local); | |
f0706e82 JB |
937 | } |
938 | ||
939 | void sta_info_stop(struct ieee80211_local *local) | |
940 | { | |
a56f992c | 941 | del_timer_sync(&local->sta_cleanup); |
f0706e82 JB |
942 | } |
943 | ||
051007d9 JB |
944 | |
945 | int sta_info_flush_defer(struct ieee80211_sub_if_data *sdata) | |
f0706e82 | 946 | { |
b998e8bb | 947 | struct ieee80211_local *local = sdata->local; |
f0706e82 | 948 | struct sta_info *sta, *tmp; |
44213b5e | 949 | int ret = 0; |
f0706e82 | 950 | |
d0709a65 | 951 | might_sleep(); |
be8755e1 | 952 | |
34e89507 | 953 | mutex_lock(&local->sta_mtx); |
d0709a65 | 954 | list_for_each_entry_safe(sta, tmp, &local->sta_list, list) { |
b998e8bb | 955 | if (sdata == sta->sdata) { |
34e89507 | 956 | WARN_ON(__sta_info_destroy(sta)); |
34316837 JB |
957 | ret++; |
958 | } | |
be8755e1 | 959 | } |
34e89507 | 960 | mutex_unlock(&local->sta_mtx); |
44213b5e | 961 | |
051007d9 JB |
962 | return ret; |
963 | } | |
964 | ||
965 | void sta_info_flush_cleanup(struct ieee80211_sub_if_data *sdata) | |
966 | { | |
b998e8bb JB |
967 | ieee80211_cleanup_sdata_stas(sdata); |
968 | cancel_work_sync(&sdata->cleanup_stations_wk); | |
f0706e82 | 969 | } |
dc6676b7 | 970 | |
24723d1b JB |
971 | void ieee80211_sta_expire(struct ieee80211_sub_if_data *sdata, |
972 | unsigned long exp_time) | |
973 | { | |
974 | struct ieee80211_local *local = sdata->local; | |
975 | struct sta_info *sta, *tmp; | |
24723d1b | 976 | |
34e89507 | 977 | mutex_lock(&local->sta_mtx); |
e46a2cf9 MSS |
978 | |
979 | list_for_each_entry_safe(sta, tmp, &local->sta_list, list) { | |
ec2b774e ML |
980 | if (sdata != sta->sdata) |
981 | continue; | |
982 | ||
24723d1b | 983 | if (time_after(jiffies, sta->last_rx + exp_time)) { |
eea57d42 MSS |
984 | sta_dbg(sta->sdata, "expiring inactive STA %pM\n", |
985 | sta->sta.addr); | |
3f52b7e3 MP |
986 | |
987 | if (ieee80211_vif_is_mesh(&sdata->vif) && | |
988 | test_sta_flag(sta, WLAN_STA_PS_STA)) | |
989 | atomic_dec(&sdata->u.mesh.ps.num_sta_ps); | |
990 | ||
34e89507 | 991 | WARN_ON(__sta_info_destroy(sta)); |
24723d1b | 992 | } |
e46a2cf9 MSS |
993 | } |
994 | ||
34e89507 | 995 | mutex_unlock(&local->sta_mtx); |
24723d1b | 996 | } |
17741cdc | 997 | |
686b9cb9 BG |
998 | struct ieee80211_sta *ieee80211_find_sta_by_ifaddr(struct ieee80211_hw *hw, |
999 | const u8 *addr, | |
1000 | const u8 *localaddr) | |
17741cdc | 1001 | { |
abe60632 | 1002 | struct sta_info *sta, *nxt; |
17741cdc | 1003 | |
686b9cb9 BG |
1004 | /* |
1005 | * Just return a random station if localaddr is NULL | |
1006 | * ... first in list. | |
1007 | */ | |
f7c65594 | 1008 | for_each_sta_info(hw_to_local(hw), addr, sta, nxt) { |
686b9cb9 | 1009 | if (localaddr && |
b203ca39 | 1010 | !ether_addr_equal(sta->sdata->vif.addr, localaddr)) |
686b9cb9 | 1011 | continue; |
f7c65594 JB |
1012 | if (!sta->uploaded) |
1013 | return NULL; | |
abe60632 | 1014 | return &sta->sta; |
f7c65594 JB |
1015 | } |
1016 | ||
abe60632 | 1017 | return NULL; |
17741cdc | 1018 | } |
686b9cb9 | 1019 | EXPORT_SYMBOL_GPL(ieee80211_find_sta_by_ifaddr); |
5ed176e1 JB |
1020 | |
1021 | struct ieee80211_sta *ieee80211_find_sta(struct ieee80211_vif *vif, | |
1022 | const u8 *addr) | |
1023 | { | |
f7c65594 | 1024 | struct sta_info *sta; |
5ed176e1 JB |
1025 | |
1026 | if (!vif) | |
1027 | return NULL; | |
1028 | ||
f7c65594 JB |
1029 | sta = sta_info_get_bss(vif_to_sdata(vif), addr); |
1030 | if (!sta) | |
1031 | return NULL; | |
1032 | ||
1033 | if (!sta->uploaded) | |
1034 | return NULL; | |
5ed176e1 | 1035 | |
f7c65594 | 1036 | return &sta->sta; |
5ed176e1 | 1037 | } |
17741cdc | 1038 | EXPORT_SYMBOL(ieee80211_find_sta); |
af818581 | 1039 | |
50a9432d JB |
1040 | static void clear_sta_ps_flags(void *_sta) |
1041 | { | |
1042 | struct sta_info *sta = _sta; | |
608383bf | 1043 | struct ieee80211_sub_if_data *sdata = sta->sdata; |
d012a605 MP |
1044 | struct ps_data *ps; |
1045 | ||
1046 | if (sdata->vif.type == NL80211_IFTYPE_AP || | |
1047 | sdata->vif.type == NL80211_IFTYPE_AP_VLAN) | |
1048 | ps = &sdata->bss->ps; | |
3f52b7e3 MP |
1049 | else if (ieee80211_vif_is_mesh(&sdata->vif)) |
1050 | ps = &sdata->u.mesh.ps; | |
d012a605 MP |
1051 | else |
1052 | return; | |
50a9432d | 1053 | |
c2c98fde | 1054 | clear_sta_flag(sta, WLAN_STA_PS_DRIVER); |
608383bf | 1055 | if (test_and_clear_sta_flag(sta, WLAN_STA_PS_STA)) |
d012a605 | 1056 | atomic_dec(&ps->num_sta_ps); |
50a9432d JB |
1057 | } |
1058 | ||
af818581 JB |
1059 | /* powersave support code */ |
1060 | void ieee80211_sta_ps_deliver_wakeup(struct sta_info *sta) | |
1061 | { | |
1062 | struct ieee80211_sub_if_data *sdata = sta->sdata; | |
1063 | struct ieee80211_local *local = sdata->local; | |
948d887d JB |
1064 | struct sk_buff_head pending; |
1065 | int filtered = 0, buffered = 0, ac; | |
987c285c | 1066 | unsigned long flags; |
948d887d | 1067 | |
c2c98fde | 1068 | clear_sta_flag(sta, WLAN_STA_SP); |
47086fc5 | 1069 | |
5a306f58 | 1070 | BUILD_BUG_ON(BITS_TO_LONGS(IEEE80211_NUM_TIDS) > 1); |
948d887d | 1071 | sta->driver_buffered_tids = 0; |
af818581 | 1072 | |
d057e5a3 AN |
1073 | if (!(local->hw.flags & IEEE80211_HW_AP_LINK_PS)) |
1074 | drv_sta_notify(local, sdata, STA_NOTIFY_AWAKE, &sta->sta); | |
af818581 | 1075 | |
948d887d | 1076 | skb_queue_head_init(&pending); |
af818581 JB |
1077 | |
1078 | /* Send all buffered frames to the station */ | |
948d887d JB |
1079 | for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) { |
1080 | int count = skb_queue_len(&pending), tmp; | |
1081 | ||
987c285c | 1082 | spin_lock_irqsave(&sta->tx_filtered[ac].lock, flags); |
948d887d | 1083 | skb_queue_splice_tail_init(&sta->tx_filtered[ac], &pending); |
987c285c | 1084 | spin_unlock_irqrestore(&sta->tx_filtered[ac].lock, flags); |
948d887d JB |
1085 | tmp = skb_queue_len(&pending); |
1086 | filtered += tmp - count; | |
1087 | count = tmp; | |
1088 | ||
987c285c | 1089 | spin_lock_irqsave(&sta->ps_tx_buf[ac].lock, flags); |
948d887d | 1090 | skb_queue_splice_tail_init(&sta->ps_tx_buf[ac], &pending); |
987c285c | 1091 | spin_unlock_irqrestore(&sta->ps_tx_buf[ac].lock, flags); |
948d887d JB |
1092 | tmp = skb_queue_len(&pending); |
1093 | buffered += tmp - count; | |
1094 | } | |
1095 | ||
1096 | ieee80211_add_pending_skbs_fn(local, &pending, clear_sta_ps_flags, sta); | |
1097 | ||
687da132 EG |
1098 | /* This station just woke up and isn't aware of our SMPS state */ |
1099 | if (!ieee80211_smps_is_restrictive(sta->known_smps_mode, | |
1100 | sdata->smps_mode) && | |
1101 | sta->known_smps_mode != sdata->bss->req_smps && | |
1102 | sta_info_tx_streams(sta) != 1) { | |
1103 | ht_dbg(sdata, | |
1104 | "%pM just woke up and MIMO capable - update SMPS\n", | |
1105 | sta->sta.addr); | |
1106 | ieee80211_send_smps_action(sdata, sdata->bss->req_smps, | |
1107 | sta->sta.addr, | |
1108 | sdata->vif.bss_conf.bssid); | |
1109 | } | |
1110 | ||
af818581 JB |
1111 | local->total_ps_buffered -= buffered; |
1112 | ||
c868cb35 JB |
1113 | sta_info_recalc_tim(sta); |
1114 | ||
bdcbd8e0 JB |
1115 | ps_dbg(sdata, |
1116 | "STA %pM aid %d sending %d filtered/%d PS frames since STA not sleeping anymore\n", | |
1117 | sta->sta.addr, sta->sta.aid, filtered, buffered); | |
af818581 JB |
1118 | } |
1119 | ||
ce662b44 JB |
1120 | static void ieee80211_send_null_response(struct ieee80211_sub_if_data *sdata, |
1121 | struct sta_info *sta, int tid, | |
40b96408 | 1122 | enum ieee80211_frame_release_type reason) |
af818581 | 1123 | { |
af818581 | 1124 | struct ieee80211_local *local = sdata->local; |
ce662b44 | 1125 | struct ieee80211_qos_hdr *nullfunc; |
af818581 | 1126 | struct sk_buff *skb; |
ce662b44 JB |
1127 | int size = sizeof(*nullfunc); |
1128 | __le16 fc; | |
c2c98fde | 1129 | bool qos = test_sta_flag(sta, WLAN_STA_WME); |
ce662b44 | 1130 | struct ieee80211_tx_info *info; |
55de908a | 1131 | struct ieee80211_chanctx_conf *chanctx_conf; |
af818581 | 1132 | |
ce662b44 JB |
1133 | if (qos) { |
1134 | fc = cpu_to_le16(IEEE80211_FTYPE_DATA | | |
1135 | IEEE80211_STYPE_QOS_NULLFUNC | | |
1136 | IEEE80211_FCTL_FROMDS); | |
1137 | } else { | |
1138 | size -= 2; | |
1139 | fc = cpu_to_le16(IEEE80211_FTYPE_DATA | | |
1140 | IEEE80211_STYPE_NULLFUNC | | |
1141 | IEEE80211_FCTL_FROMDS); | |
af818581 | 1142 | } |
af818581 | 1143 | |
ce662b44 JB |
1144 | skb = dev_alloc_skb(local->hw.extra_tx_headroom + size); |
1145 | if (!skb) | |
1146 | return; | |
1147 | ||
1148 | skb_reserve(skb, local->hw.extra_tx_headroom); | |
1149 | ||
1150 | nullfunc = (void *) skb_put(skb, size); | |
1151 | nullfunc->frame_control = fc; | |
1152 | nullfunc->duration_id = 0; | |
1153 | memcpy(nullfunc->addr1, sta->sta.addr, ETH_ALEN); | |
1154 | memcpy(nullfunc->addr2, sdata->vif.addr, ETH_ALEN); | |
1155 | memcpy(nullfunc->addr3, sdata->vif.addr, ETH_ALEN); | |
1156 | ||
59b66255 JB |
1157 | skb->priority = tid; |
1158 | skb_set_queue_mapping(skb, ieee802_1d_to_ac[tid]); | |
ce662b44 | 1159 | if (qos) { |
ce662b44 JB |
1160 | nullfunc->qos_ctrl = cpu_to_le16(tid); |
1161 | ||
40b96408 | 1162 | if (reason == IEEE80211_FRAME_RELEASE_UAPSD) |
ce662b44 JB |
1163 | nullfunc->qos_ctrl |= |
1164 | cpu_to_le16(IEEE80211_QOS_CTL_EOSP); | |
1165 | } | |
1166 | ||
1167 | info = IEEE80211_SKB_CB(skb); | |
1168 | ||
1169 | /* | |
1170 | * Tell TX path to send this frame even though the | |
1171 | * STA may still remain is PS mode after this frame | |
deeaee19 JB |
1172 | * exchange. Also set EOSP to indicate this packet |
1173 | * ends the poll/service period. | |
ce662b44 | 1174 | */ |
02f2f1a9 | 1175 | info->flags |= IEEE80211_TX_CTL_NO_PS_BUFFER | |
d6d23de2 | 1176 | IEEE80211_TX_CTL_PS_RESPONSE | |
deeaee19 JB |
1177 | IEEE80211_TX_STATUS_EOSP | |
1178 | IEEE80211_TX_CTL_REQ_TX_STATUS; | |
ce662b44 | 1179 | |
40b96408 JB |
1180 | drv_allow_buffered_frames(local, sta, BIT(tid), 1, reason, false); |
1181 | ||
89afe614 JB |
1182 | skb->dev = sdata->dev; |
1183 | ||
55de908a JB |
1184 | rcu_read_lock(); |
1185 | chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf); | |
1186 | if (WARN_ON(!chanctx_conf)) { | |
1187 | rcu_read_unlock(); | |
1188 | kfree_skb(skb); | |
1189 | return; | |
1190 | } | |
1191 | ||
4bf88530 | 1192 | ieee80211_xmit(sdata, skb, chanctx_conf->def.chan->band); |
55de908a | 1193 | rcu_read_unlock(); |
ce662b44 JB |
1194 | } |
1195 | ||
47086fc5 JB |
1196 | static void |
1197 | ieee80211_sta_ps_deliver_response(struct sta_info *sta, | |
1198 | int n_frames, u8 ignored_acs, | |
1199 | enum ieee80211_frame_release_type reason) | |
af818581 JB |
1200 | { |
1201 | struct ieee80211_sub_if_data *sdata = sta->sdata; | |
1202 | struct ieee80211_local *local = sdata->local; | |
4049e09a | 1203 | bool found = false; |
948d887d JB |
1204 | bool more_data = false; |
1205 | int ac; | |
4049e09a | 1206 | unsigned long driver_release_tids = 0; |
47086fc5 | 1207 | struct sk_buff_head frames; |
af818581 | 1208 | |
deeaee19 | 1209 | /* Service or PS-Poll period starts */ |
c2c98fde | 1210 | set_sta_flag(sta, WLAN_STA_SP); |
deeaee19 | 1211 | |
47086fc5 | 1212 | __skb_queue_head_init(&frames); |
948d887d JB |
1213 | |
1214 | /* | |
47086fc5 | 1215 | * Get response frame(s) and more data bit for it. |
948d887d JB |
1216 | */ |
1217 | for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) { | |
4049e09a JB |
1218 | unsigned long tids; |
1219 | ||
47086fc5 | 1220 | if (ignored_acs & BIT(ac)) |
948d887d JB |
1221 | continue; |
1222 | ||
4049e09a JB |
1223 | tids = ieee80211_tids_for_ac(ac); |
1224 | ||
1225 | if (!found) { | |
1226 | driver_release_tids = sta->driver_buffered_tids & tids; | |
1227 | if (driver_release_tids) { | |
1228 | found = true; | |
1229 | } else { | |
47086fc5 JB |
1230 | struct sk_buff *skb; |
1231 | ||
1232 | while (n_frames > 0) { | |
1233 | skb = skb_dequeue(&sta->tx_filtered[ac]); | |
1234 | if (!skb) { | |
1235 | skb = skb_dequeue( | |
1236 | &sta->ps_tx_buf[ac]); | |
1237 | if (skb) | |
1238 | local->total_ps_buffered--; | |
1239 | } | |
1240 | if (!skb) | |
1241 | break; | |
1242 | n_frames--; | |
4049e09a | 1243 | found = true; |
47086fc5 JB |
1244 | __skb_queue_tail(&frames, skb); |
1245 | } | |
948d887d | 1246 | } |
948d887d | 1247 | |
4049e09a JB |
1248 | /* |
1249 | * If the driver has data on more than one TID then | |
1250 | * certainly there's more data if we release just a | |
1251 | * single frame now (from a single TID). | |
1252 | */ | |
47086fc5 JB |
1253 | if (reason == IEEE80211_FRAME_RELEASE_PSPOLL && |
1254 | hweight16(driver_release_tids) > 1) { | |
4049e09a JB |
1255 | more_data = true; |
1256 | driver_release_tids = | |
1257 | BIT(ffs(driver_release_tids) - 1); | |
1258 | break; | |
1259 | } | |
1260 | } | |
948d887d JB |
1261 | |
1262 | if (!skb_queue_empty(&sta->tx_filtered[ac]) || | |
1263 | !skb_queue_empty(&sta->ps_tx_buf[ac])) { | |
1264 | more_data = true; | |
1265 | break; | |
1266 | } | |
af818581 | 1267 | } |
af818581 | 1268 | |
4049e09a | 1269 | if (!found) { |
ce662b44 | 1270 | int tid; |
af818581 JB |
1271 | |
1272 | /* | |
ce662b44 JB |
1273 | * For PS-Poll, this can only happen due to a race condition |
1274 | * when we set the TIM bit and the station notices it, but | |
1275 | * before it can poll for the frame we expire it. | |
1276 | * | |
1277 | * For uAPSD, this is said in the standard (11.2.1.5 h): | |
1278 | * At each unscheduled SP for a non-AP STA, the AP shall | |
1279 | * attempt to transmit at least one MSDU or MMPDU, but no | |
1280 | * more than the value specified in the Max SP Length field | |
1281 | * in the QoS Capability element from delivery-enabled ACs, | |
1282 | * that are destined for the non-AP STA. | |
1283 | * | |
1284 | * Since we have no other MSDU/MMPDU, transmit a QoS null frame. | |
af818581 | 1285 | */ |
af818581 | 1286 | |
ce662b44 JB |
1287 | /* This will evaluate to 1, 3, 5 or 7. */ |
1288 | tid = 7 - ((ffs(~ignored_acs) - 1) << 1); | |
af818581 | 1289 | |
40b96408 | 1290 | ieee80211_send_null_response(sdata, sta, tid, reason); |
4049e09a JB |
1291 | return; |
1292 | } | |
af818581 | 1293 | |
47086fc5 JB |
1294 | if (!driver_release_tids) { |
1295 | struct sk_buff_head pending; | |
1296 | struct sk_buff *skb; | |
40b96408 JB |
1297 | int num = 0; |
1298 | u16 tids = 0; | |
af818581 | 1299 | |
47086fc5 | 1300 | skb_queue_head_init(&pending); |
af818581 | 1301 | |
47086fc5 JB |
1302 | while ((skb = __skb_dequeue(&frames))) { |
1303 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); | |
1304 | struct ieee80211_hdr *hdr = (void *) skb->data; | |
40b96408 JB |
1305 | u8 *qoshdr = NULL; |
1306 | ||
1307 | num++; | |
af818581 | 1308 | |
47086fc5 JB |
1309 | /* |
1310 | * Tell TX path to send this frame even though the | |
1311 | * STA may still remain is PS mode after this frame | |
1312 | * exchange. | |
1313 | */ | |
d6d23de2 FF |
1314 | info->flags |= IEEE80211_TX_CTL_NO_PS_BUFFER | |
1315 | IEEE80211_TX_CTL_PS_RESPONSE; | |
47086fc5 JB |
1316 | |
1317 | /* | |
1318 | * Use MoreData flag to indicate whether there are | |
1319 | * more buffered frames for this STA | |
1320 | */ | |
24b9c373 | 1321 | if (more_data || !skb_queue_empty(&frames)) |
47086fc5 JB |
1322 | hdr->frame_control |= |
1323 | cpu_to_le16(IEEE80211_FCTL_MOREDATA); | |
24b9c373 JD |
1324 | else |
1325 | hdr->frame_control &= | |
1326 | cpu_to_le16(~IEEE80211_FCTL_MOREDATA); | |
47086fc5 | 1327 | |
40b96408 JB |
1328 | if (ieee80211_is_data_qos(hdr->frame_control) || |
1329 | ieee80211_is_qos_nullfunc(hdr->frame_control)) | |
1330 | qoshdr = ieee80211_get_qos_ctl(hdr); | |
1331 | ||
52a3f20c MP |
1332 | /* end service period after last frame */ |
1333 | if (skb_queue_empty(&frames)) { | |
1334 | if (reason == IEEE80211_FRAME_RELEASE_UAPSD && | |
1335 | qoshdr) | |
1336 | *qoshdr |= IEEE80211_QOS_CTL_EOSP; | |
1337 | ||
1338 | info->flags |= IEEE80211_TX_STATUS_EOSP | | |
1339 | IEEE80211_TX_CTL_REQ_TX_STATUS; | |
1340 | } | |
deeaee19 | 1341 | |
40b96408 JB |
1342 | if (qoshdr) |
1343 | tids |= BIT(*qoshdr & IEEE80211_QOS_CTL_TID_MASK); | |
1344 | else | |
1345 | tids |= BIT(0); | |
1346 | ||
47086fc5 JB |
1347 | __skb_queue_tail(&pending, skb); |
1348 | } | |
af818581 | 1349 | |
40b96408 JB |
1350 | drv_allow_buffered_frames(local, sta, tids, num, |
1351 | reason, more_data); | |
1352 | ||
47086fc5 | 1353 | ieee80211_add_pending_skbs(local, &pending); |
af818581 | 1354 | |
c868cb35 | 1355 | sta_info_recalc_tim(sta); |
af818581 JB |
1356 | } else { |
1357 | /* | |
4049e09a JB |
1358 | * We need to release a frame that is buffered somewhere in the |
1359 | * driver ... it'll have to handle that. | |
1360 | * Note that, as per the comment above, it'll also have to see | |
1361 | * if there is more than just one frame on the specific TID that | |
1362 | * we're releasing from, and it needs to set the more-data bit | |
1363 | * accordingly if we tell it that there's no more data. If we do | |
1364 | * tell it there's more data, then of course the more-data bit | |
1365 | * needs to be set anyway. | |
1366 | */ | |
1367 | drv_release_buffered_frames(local, sta, driver_release_tids, | |
47086fc5 | 1368 | n_frames, reason, more_data); |
4049e09a JB |
1369 | |
1370 | /* | |
1371 | * Note that we don't recalculate the TIM bit here as it would | |
1372 | * most likely have no effect at all unless the driver told us | |
1373 | * that the TID became empty before returning here from the | |
1374 | * release function. | |
1375 | * Either way, however, when the driver tells us that the TID | |
1376 | * became empty we'll do the TIM recalculation. | |
af818581 | 1377 | */ |
af818581 JB |
1378 | } |
1379 | } | |
1380 | ||
47086fc5 JB |
1381 | void ieee80211_sta_ps_deliver_poll_response(struct sta_info *sta) |
1382 | { | |
1383 | u8 ignore_for_response = sta->sta.uapsd_queues; | |
1384 | ||
1385 | /* | |
1386 | * If all ACs are delivery-enabled then we should reply | |
1387 | * from any of them, if only some are enabled we reply | |
1388 | * only from the non-enabled ones. | |
1389 | */ | |
1390 | if (ignore_for_response == BIT(IEEE80211_NUM_ACS) - 1) | |
1391 | ignore_for_response = 0; | |
1392 | ||
1393 | ieee80211_sta_ps_deliver_response(sta, 1, ignore_for_response, | |
1394 | IEEE80211_FRAME_RELEASE_PSPOLL); | |
1395 | } | |
1396 | ||
1397 | void ieee80211_sta_ps_deliver_uapsd(struct sta_info *sta) | |
1398 | { | |
1399 | int n_frames = sta->sta.max_sp; | |
1400 | u8 delivery_enabled = sta->sta.uapsd_queues; | |
1401 | ||
1402 | /* | |
1403 | * If we ever grow support for TSPEC this might happen if | |
1404 | * the TSPEC update from hostapd comes in between a trigger | |
1405 | * frame setting WLAN_STA_UAPSD in the RX path and this | |
1406 | * actually getting called. | |
1407 | */ | |
1408 | if (!delivery_enabled) | |
1409 | return; | |
1410 | ||
47086fc5 JB |
1411 | switch (sta->sta.max_sp) { |
1412 | case 1: | |
1413 | n_frames = 2; | |
1414 | break; | |
1415 | case 2: | |
1416 | n_frames = 4; | |
1417 | break; | |
1418 | case 3: | |
1419 | n_frames = 6; | |
1420 | break; | |
1421 | case 0: | |
1422 | /* XXX: what is a good value? */ | |
1423 | n_frames = 8; | |
1424 | break; | |
1425 | } | |
1426 | ||
1427 | ieee80211_sta_ps_deliver_response(sta, n_frames, ~delivery_enabled, | |
1428 | IEEE80211_FRAME_RELEASE_UAPSD); | |
1429 | } | |
1430 | ||
af818581 JB |
1431 | void ieee80211_sta_block_awake(struct ieee80211_hw *hw, |
1432 | struct ieee80211_sta *pubsta, bool block) | |
1433 | { | |
1434 | struct sta_info *sta = container_of(pubsta, struct sta_info, sta); | |
1435 | ||
b5878a2d JB |
1436 | trace_api_sta_block_awake(sta->local, pubsta, block); |
1437 | ||
af818581 | 1438 | if (block) |
c2c98fde JB |
1439 | set_sta_flag(sta, WLAN_STA_PS_DRIVER); |
1440 | else if (test_sta_flag(sta, WLAN_STA_PS_DRIVER)) | |
af818581 JB |
1441 | ieee80211_queue_work(hw, &sta->drv_unblock_wk); |
1442 | } | |
1443 | EXPORT_SYMBOL(ieee80211_sta_block_awake); | |
dcf55fb5 | 1444 | |
e943789e | 1445 | void ieee80211_sta_eosp(struct ieee80211_sta *pubsta) |
37fbd908 JB |
1446 | { |
1447 | struct sta_info *sta = container_of(pubsta, struct sta_info, sta); | |
1448 | struct ieee80211_local *local = sta->local; | |
37fbd908 JB |
1449 | |
1450 | trace_api_eosp(local, pubsta); | |
1451 | ||
e943789e | 1452 | clear_sta_flag(sta, WLAN_STA_SP); |
37fbd908 | 1453 | } |
e943789e | 1454 | EXPORT_SYMBOL(ieee80211_sta_eosp); |
37fbd908 | 1455 | |
042ec453 JB |
1456 | void ieee80211_sta_set_buffered(struct ieee80211_sta *pubsta, |
1457 | u8 tid, bool buffered) | |
dcf55fb5 FF |
1458 | { |
1459 | struct sta_info *sta = container_of(pubsta, struct sta_info, sta); | |
1460 | ||
5a306f58 | 1461 | if (WARN_ON(tid >= IEEE80211_NUM_TIDS)) |
042ec453 JB |
1462 | return; |
1463 | ||
948d887d JB |
1464 | if (buffered) |
1465 | set_bit(tid, &sta->driver_buffered_tids); | |
1466 | else | |
1467 | clear_bit(tid, &sta->driver_buffered_tids); | |
1468 | ||
c868cb35 | 1469 | sta_info_recalc_tim(sta); |
dcf55fb5 | 1470 | } |
042ec453 | 1471 | EXPORT_SYMBOL(ieee80211_sta_set_buffered); |
d9a7ddb0 | 1472 | |
83d5cc01 JB |
1473 | int sta_info_move_state(struct sta_info *sta, |
1474 | enum ieee80211_sta_state new_state) | |
d9a7ddb0 | 1475 | { |
8bf11d8d | 1476 | might_sleep(); |
d9a7ddb0 JB |
1477 | |
1478 | if (sta->sta_state == new_state) | |
1479 | return 0; | |
1480 | ||
f09603a2 JB |
1481 | /* check allowed transitions first */ |
1482 | ||
1483 | switch (new_state) { | |
1484 | case IEEE80211_STA_NONE: | |
1485 | if (sta->sta_state != IEEE80211_STA_AUTH) | |
1486 | return -EINVAL; | |
1487 | break; | |
1488 | case IEEE80211_STA_AUTH: | |
1489 | if (sta->sta_state != IEEE80211_STA_NONE && | |
1490 | sta->sta_state != IEEE80211_STA_ASSOC) | |
1491 | return -EINVAL; | |
1492 | break; | |
1493 | case IEEE80211_STA_ASSOC: | |
1494 | if (sta->sta_state != IEEE80211_STA_AUTH && | |
1495 | sta->sta_state != IEEE80211_STA_AUTHORIZED) | |
1496 | return -EINVAL; | |
1497 | break; | |
1498 | case IEEE80211_STA_AUTHORIZED: | |
1499 | if (sta->sta_state != IEEE80211_STA_ASSOC) | |
1500 | return -EINVAL; | |
1501 | break; | |
1502 | default: | |
1503 | WARN(1, "invalid state %d", new_state); | |
1504 | return -EINVAL; | |
1505 | } | |
1506 | ||
bdcbd8e0 JB |
1507 | sta_dbg(sta->sdata, "moving STA %pM to state %d\n", |
1508 | sta->sta.addr, new_state); | |
f09603a2 JB |
1509 | |
1510 | /* | |
1511 | * notify the driver before the actual changes so it can | |
1512 | * fail the transition | |
1513 | */ | |
1514 | if (test_sta_flag(sta, WLAN_STA_INSERTED)) { | |
1515 | int err = drv_sta_state(sta->local, sta->sdata, sta, | |
1516 | sta->sta_state, new_state); | |
1517 | if (err) | |
1518 | return err; | |
1519 | } | |
1520 | ||
1521 | /* reflect the change in all state variables */ | |
1522 | ||
d9a7ddb0 JB |
1523 | switch (new_state) { |
1524 | case IEEE80211_STA_NONE: | |
1525 | if (sta->sta_state == IEEE80211_STA_AUTH) | |
1526 | clear_bit(WLAN_STA_AUTH, &sta->_flags); | |
d9a7ddb0 JB |
1527 | break; |
1528 | case IEEE80211_STA_AUTH: | |
1529 | if (sta->sta_state == IEEE80211_STA_NONE) | |
1530 | set_bit(WLAN_STA_AUTH, &sta->_flags); | |
1531 | else if (sta->sta_state == IEEE80211_STA_ASSOC) | |
1532 | clear_bit(WLAN_STA_ASSOC, &sta->_flags); | |
d9a7ddb0 JB |
1533 | break; |
1534 | case IEEE80211_STA_ASSOC: | |
29623892 | 1535 | if (sta->sta_state == IEEE80211_STA_AUTH) { |
d9a7ddb0 | 1536 | set_bit(WLAN_STA_ASSOC, &sta->_flags); |
29623892 | 1537 | } else if (sta->sta_state == IEEE80211_STA_AUTHORIZED) { |
7e3ed02c FF |
1538 | if (sta->sdata->vif.type == NL80211_IFTYPE_AP || |
1539 | (sta->sdata->vif.type == NL80211_IFTYPE_AP_VLAN && | |
1540 | !sta->sdata->u.vlan.sta)) | |
1541 | atomic_dec(&sta->sdata->bss->num_mcast_sta); | |
d9a7ddb0 | 1542 | clear_bit(WLAN_STA_AUTHORIZED, &sta->_flags); |
f09603a2 | 1543 | } |
d9a7ddb0 JB |
1544 | break; |
1545 | case IEEE80211_STA_AUTHORIZED: | |
29623892 | 1546 | if (sta->sta_state == IEEE80211_STA_ASSOC) { |
7e3ed02c FF |
1547 | if (sta->sdata->vif.type == NL80211_IFTYPE_AP || |
1548 | (sta->sdata->vif.type == NL80211_IFTYPE_AP_VLAN && | |
1549 | !sta->sdata->u.vlan.sta)) | |
1550 | atomic_inc(&sta->sdata->bss->num_mcast_sta); | |
d9a7ddb0 | 1551 | set_bit(WLAN_STA_AUTHORIZED, &sta->_flags); |
f09603a2 | 1552 | } |
d9a7ddb0 JB |
1553 | break; |
1554 | default: | |
f09603a2 | 1555 | break; |
d9a7ddb0 JB |
1556 | } |
1557 | ||
d9a7ddb0 JB |
1558 | sta->sta_state = new_state; |
1559 | ||
1560 | return 0; | |
1561 | } | |
687da132 EG |
1562 | |
1563 | u8 sta_info_tx_streams(struct sta_info *sta) | |
1564 | { | |
1565 | struct ieee80211_sta_ht_cap *ht_cap = &sta->sta.ht_cap; | |
1566 | u8 rx_streams; | |
1567 | ||
1568 | if (!sta->sta.ht_cap.ht_supported) | |
1569 | return 1; | |
1570 | ||
1571 | if (sta->sta.vht_cap.vht_supported) { | |
1572 | int i; | |
1573 | u16 tx_mcs_map = | |
1574 | le16_to_cpu(sta->sta.vht_cap.vht_mcs.tx_mcs_map); | |
1575 | ||
1576 | for (i = 7; i >= 0; i--) | |
1577 | if ((tx_mcs_map & (0x3 << (i * 2))) != | |
1578 | IEEE80211_VHT_MCS_NOT_SUPPORTED) | |
1579 | return i + 1; | |
1580 | } | |
1581 | ||
1582 | if (ht_cap->mcs.rx_mask[3]) | |
1583 | rx_streams = 4; | |
1584 | else if (ht_cap->mcs.rx_mask[2]) | |
1585 | rx_streams = 3; | |
1586 | else if (ht_cap->mcs.rx_mask[1]) | |
1587 | rx_streams = 2; | |
1588 | else | |
1589 | rx_streams = 1; | |
1590 | ||
1591 | if (!(ht_cap->mcs.tx_params & IEEE80211_HT_MCS_TX_RX_DIFF)) | |
1592 | return rx_streams; | |
1593 | ||
1594 | return ((ht_cap->mcs.tx_params & IEEE80211_HT_MCS_TX_MAX_STREAMS_MASK) | |
1595 | >> IEEE80211_HT_MCS_TX_MAX_STREAMS_SHIFT) + 1; | |
1596 | } |