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 | ||
b22cfcfc EP |
94 | static void free_sta_work(struct work_struct *wk) |
95 | { | |
96 | struct sta_info *sta = container_of(wk, struct sta_info, free_sta_wk); | |
97 | int ac, i; | |
98 | struct tid_ampdu_tx *tid_tx; | |
99 | struct ieee80211_sub_if_data *sdata = sta->sdata; | |
100 | struct ieee80211_local *local = sdata->local; | |
d012a605 | 101 | struct ps_data *ps; |
b22cfcfc EP |
102 | |
103 | /* | |
104 | * At this point, when being called as call_rcu callback, | |
105 | * neither mac80211 nor the driver can reference this | |
106 | * sta struct any more except by still existing timers | |
107 | * associated with this station that we clean up below. | |
108 | */ | |
109 | ||
110 | if (test_sta_flag(sta, WLAN_STA_PS_STA)) { | |
d012a605 MP |
111 | if (sta->sdata->vif.type == NL80211_IFTYPE_AP || |
112 | sta->sdata->vif.type == NL80211_IFTYPE_AP_VLAN) | |
113 | ps = &sdata->bss->ps; | |
114 | else | |
115 | return; | |
b22cfcfc EP |
116 | |
117 | clear_sta_flag(sta, WLAN_STA_PS_STA); | |
118 | ||
d012a605 | 119 | atomic_dec(&ps->num_sta_ps); |
b22cfcfc EP |
120 | sta_info_recalc_tim(sta); |
121 | } | |
122 | ||
123 | for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) { | |
124 | local->total_ps_buffered -= skb_queue_len(&sta->ps_tx_buf[ac]); | |
1f98ab7f FF |
125 | ieee80211_purge_tx_queue(&local->hw, &sta->ps_tx_buf[ac]); |
126 | ieee80211_purge_tx_queue(&local->hw, &sta->tx_filtered[ac]); | |
b22cfcfc EP |
127 | } |
128 | ||
129 | #ifdef CONFIG_MAC80211_MESH | |
130 | if (ieee80211_vif_is_mesh(&sdata->vif)) { | |
131 | mesh_accept_plinks_update(sdata); | |
132 | mesh_plink_deactivate(sta); | |
133 | del_timer_sync(&sta->plink_timer); | |
134 | } | |
135 | #endif | |
136 | ||
137 | cancel_work_sync(&sta->drv_unblock_wk); | |
138 | ||
139 | /* | |
140 | * Destroy aggregation state here. It would be nice to wait for the | |
141 | * driver to finish aggregation stop and then clean up, but for now | |
142 | * drivers have to handle aggregation stop being requested, followed | |
143 | * directly by station destruction. | |
144 | */ | |
5a306f58 | 145 | for (i = 0; i < IEEE80211_NUM_TIDS; i++) { |
b22cfcfc EP |
146 | tid_tx = rcu_dereference_raw(sta->ampdu_mlme.tid_tx[i]); |
147 | if (!tid_tx) | |
148 | continue; | |
1f98ab7f | 149 | ieee80211_purge_tx_queue(&local->hw, &tid_tx->pending); |
b22cfcfc EP |
150 | kfree(tid_tx); |
151 | } | |
152 | ||
153 | sta_info_free(local, sta); | |
154 | } | |
155 | ||
156 | static void free_sta_rcu(struct rcu_head *h) | |
157 | { | |
158 | struct sta_info *sta = container_of(h, struct sta_info, rcu_head); | |
159 | ||
160 | ieee80211_queue_work(&sta->local->hw, &sta->free_sta_wk); | |
161 | } | |
162 | ||
d0709a65 | 163 | /* protected by RCU */ |
abe60632 JB |
164 | struct sta_info *sta_info_get(struct ieee80211_sub_if_data *sdata, |
165 | const u8 *addr) | |
f0706e82 | 166 | { |
abe60632 | 167 | struct ieee80211_local *local = sdata->local; |
f0706e82 JB |
168 | struct sta_info *sta; |
169 | ||
0379185b | 170 | sta = rcu_dereference_check(local->sta_hash[STA_HASH(addr)], |
0379185b | 171 | lockdep_is_held(&local->sta_mtx)); |
f0706e82 | 172 | while (sta) { |
abe60632 | 173 | if (sta->sdata == sdata && |
b203ca39 | 174 | ether_addr_equal(sta->sta.addr, addr)) |
f0706e82 | 175 | break; |
0379185b | 176 | sta = rcu_dereference_check(sta->hnext, |
0379185b | 177 | lockdep_is_held(&local->sta_mtx)); |
f0706e82 | 178 | } |
43ba7e95 JB |
179 | return sta; |
180 | } | |
181 | ||
0e5ded5a FF |
182 | /* |
183 | * Get sta info either from the specified interface | |
184 | * or from one of its vlans | |
185 | */ | |
186 | struct sta_info *sta_info_get_bss(struct ieee80211_sub_if_data *sdata, | |
187 | const u8 *addr) | |
188 | { | |
189 | struct ieee80211_local *local = sdata->local; | |
190 | struct sta_info *sta; | |
191 | ||
0379185b | 192 | sta = rcu_dereference_check(local->sta_hash[STA_HASH(addr)], |
0379185b | 193 | lockdep_is_held(&local->sta_mtx)); |
0e5ded5a FF |
194 | while (sta) { |
195 | if ((sta->sdata == sdata || | |
a2c1e3da | 196 | (sta->sdata->bss && sta->sdata->bss == sdata->bss)) && |
b203ca39 | 197 | ether_addr_equal(sta->sta.addr, addr)) |
0e5ded5a | 198 | break; |
0379185b | 199 | sta = rcu_dereference_check(sta->hnext, |
0379185b | 200 | lockdep_is_held(&local->sta_mtx)); |
0e5ded5a FF |
201 | } |
202 | return sta; | |
203 | } | |
204 | ||
3b53fde8 JB |
205 | struct sta_info *sta_info_get_by_idx(struct ieee80211_sub_if_data *sdata, |
206 | int idx) | |
ee385855 | 207 | { |
3b53fde8 | 208 | struct ieee80211_local *local = sdata->local; |
ee385855 LCC |
209 | struct sta_info *sta; |
210 | int i = 0; | |
211 | ||
d0709a65 | 212 | list_for_each_entry_rcu(sta, &local->sta_list, list) { |
3b53fde8 | 213 | if (sdata != sta->sdata) |
2a8ca29a | 214 | continue; |
ee385855 LCC |
215 | if (i < idx) { |
216 | ++i; | |
217 | continue; | |
ee385855 | 218 | } |
2a8ca29a | 219 | return sta; |
ee385855 | 220 | } |
ee385855 LCC |
221 | |
222 | return NULL; | |
223 | } | |
f0706e82 | 224 | |
93e5deb1 | 225 | /** |
d9a7ddb0 | 226 | * sta_info_free - free STA |
93e5deb1 | 227 | * |
6ef307bc | 228 | * @local: pointer to the global information |
93e5deb1 JB |
229 | * @sta: STA info to free |
230 | * | |
231 | * This function must undo everything done by sta_info_alloc() | |
d9a7ddb0 JB |
232 | * that may happen before sta_info_insert(). It may only be |
233 | * called when sta_info_insert() has not been attempted (and | |
234 | * if that fails, the station is freed anyway.) | |
93e5deb1 | 235 | */ |
d9a7ddb0 | 236 | void sta_info_free(struct ieee80211_local *local, struct sta_info *sta) |
93e5deb1 | 237 | { |
889cbb91 | 238 | if (sta->rate_ctrl) |
af65cd96 | 239 | rate_control_free_sta(sta); |
93e5deb1 | 240 | |
bdcbd8e0 | 241 | sta_dbg(sta->sdata, "Destroyed STA %pM\n", sta->sta.addr); |
93e5deb1 JB |
242 | |
243 | kfree(sta); | |
244 | } | |
245 | ||
4d33960b | 246 | /* Caller must hold local->sta_mtx */ |
d0709a65 JB |
247 | static void sta_info_hash_add(struct ieee80211_local *local, |
248 | struct sta_info *sta) | |
f0706e82 | 249 | { |
4d33960b | 250 | lockdep_assert_held(&local->sta_mtx); |
17741cdc | 251 | sta->hnext = local->sta_hash[STA_HASH(sta->sta.addr)]; |
cf778b00 | 252 | rcu_assign_pointer(local->sta_hash[STA_HASH(sta->sta.addr)], sta); |
f0706e82 | 253 | } |
f0706e82 | 254 | |
af818581 JB |
255 | static void sta_unblock(struct work_struct *wk) |
256 | { | |
257 | struct sta_info *sta; | |
258 | ||
259 | sta = container_of(wk, struct sta_info, drv_unblock_wk); | |
260 | ||
261 | if (sta->dead) | |
262 | return; | |
263 | ||
54420473 HS |
264 | if (!test_sta_flag(sta, WLAN_STA_PS_STA)) { |
265 | local_bh_disable(); | |
af818581 | 266 | ieee80211_sta_ps_deliver_wakeup(sta); |
54420473 HS |
267 | local_bh_enable(); |
268 | } else if (test_and_clear_sta_flag(sta, WLAN_STA_PSPOLL)) { | |
c2c98fde | 269 | clear_sta_flag(sta, WLAN_STA_PS_DRIVER); |
ce662b44 JB |
270 | |
271 | local_bh_disable(); | |
af818581 | 272 | ieee80211_sta_ps_deliver_poll_response(sta); |
ce662b44 | 273 | local_bh_enable(); |
c2c98fde JB |
274 | } else if (test_and_clear_sta_flag(sta, WLAN_STA_UAPSD)) { |
275 | clear_sta_flag(sta, WLAN_STA_PS_DRIVER); | |
ce662b44 JB |
276 | |
277 | local_bh_disable(); | |
47086fc5 | 278 | ieee80211_sta_ps_deliver_uapsd(sta); |
ce662b44 | 279 | local_bh_enable(); |
50a9432d | 280 | } else |
c2c98fde | 281 | clear_sta_flag(sta, WLAN_STA_PS_DRIVER); |
af818581 JB |
282 | } |
283 | ||
af65cd96 JB |
284 | static int sta_prepare_rate_control(struct ieee80211_local *local, |
285 | struct sta_info *sta, gfp_t gfp) | |
286 | { | |
287 | if (local->hw.flags & IEEE80211_HW_HAS_RATE_CONTROL) | |
288 | return 0; | |
289 | ||
889cbb91 | 290 | sta->rate_ctrl = local->rate_ctrl; |
af65cd96 JB |
291 | sta->rate_ctrl_priv = rate_control_alloc_sta(sta->rate_ctrl, |
292 | &sta->sta, gfp); | |
889cbb91 | 293 | if (!sta->rate_ctrl_priv) |
af65cd96 | 294 | return -ENOMEM; |
af65cd96 JB |
295 | |
296 | return 0; | |
297 | } | |
298 | ||
73651ee6 | 299 | struct sta_info *sta_info_alloc(struct ieee80211_sub_if_data *sdata, |
56544160 | 300 | const u8 *addr, gfp_t gfp) |
f0706e82 | 301 | { |
d0709a65 | 302 | struct ieee80211_local *local = sdata->local; |
f0706e82 | 303 | struct sta_info *sta; |
ebe27c91 | 304 | struct timespec uptime; |
16c5f15c | 305 | int i; |
f0706e82 | 306 | |
17741cdc | 307 | sta = kzalloc(sizeof(*sta) + local->hw.sta_data_size, gfp); |
f0706e82 | 308 | if (!sta) |
73651ee6 | 309 | return NULL; |
f0706e82 | 310 | |
07346f81 | 311 | spin_lock_init(&sta->lock); |
af818581 | 312 | INIT_WORK(&sta->drv_unblock_wk, sta_unblock); |
b22cfcfc | 313 | INIT_WORK(&sta->free_sta_wk, free_sta_work); |
67c282c0 | 314 | INIT_WORK(&sta->ampdu_mlme.work, ieee80211_ba_session_work); |
a93e3644 | 315 | mutex_init(&sta->ampdu_mlme.mtx); |
07346f81 | 316 | |
17741cdc | 317 | memcpy(sta->sta.addr, addr, ETH_ALEN); |
d0709a65 JB |
318 | sta->local = local; |
319 | sta->sdata = sdata; | |
8bc8aecd | 320 | sta->last_rx = jiffies; |
f0706e82 | 321 | |
71ec375c JB |
322 | sta->sta_state = IEEE80211_STA_NONE; |
323 | ||
ebe27c91 MSS |
324 | do_posix_clock_monotonic_gettime(&uptime); |
325 | sta->last_connected = uptime.tv_sec; | |
541a45a1 BR |
326 | ewma_init(&sta->avg_signal, 1024, 8); |
327 | ||
af65cd96 | 328 | if (sta_prepare_rate_control(local, sta, gfp)) { |
f0706e82 | 329 | kfree(sta); |
73651ee6 | 330 | return NULL; |
f0706e82 JB |
331 | } |
332 | ||
5a306f58 | 333 | for (i = 0; i < IEEE80211_NUM_TIDS; i++) { |
a622ab72 JB |
334 | /* |
335 | * timer_to_tid must be initialized with identity mapping | |
336 | * to enable session_timer's data differentiation. See | |
337 | * sta_rx_agg_session_timer_expired for usage. | |
338 | */ | |
16c5f15c | 339 | sta->timer_to_tid[i] = i; |
16c5f15c | 340 | } |
948d887d JB |
341 | for (i = 0; i < IEEE80211_NUM_ACS; i++) { |
342 | skb_queue_head_init(&sta->ps_tx_buf[i]); | |
343 | skb_queue_head_init(&sta->tx_filtered[i]); | |
344 | } | |
73651ee6 | 345 | |
5a306f58 | 346 | for (i = 0; i < IEEE80211_NUM_TIDS; i++) |
4be929be | 347 | sta->last_seq_ctrl[i] = cpu_to_le16(USHRT_MAX); |
cccaec98 | 348 | |
bdcbd8e0 | 349 | sta_dbg(sdata, "Allocated STA %pM\n", sta->sta.addr); |
73651ee6 | 350 | |
03e4497e | 351 | #ifdef CONFIG_MAC80211_MESH |
57cf8043 | 352 | sta->plink_state = NL80211_PLINK_LISTEN; |
03e4497e JB |
353 | init_timer(&sta->plink_timer); |
354 | #endif | |
355 | ||
73651ee6 JB |
356 | return sta; |
357 | } | |
358 | ||
8c71df7a | 359 | static int sta_info_insert_check(struct sta_info *sta) |
34e89507 | 360 | { |
34e89507 | 361 | struct ieee80211_sub_if_data *sdata = sta->sdata; |
34e89507 | 362 | |
03e4497e JB |
363 | /* |
364 | * Can't be a WARN_ON because it can be triggered through a race: | |
365 | * something inserts a STA (on one CPU) without holding the RTNL | |
366 | * and another CPU turns off the net device. | |
367 | */ | |
8c71df7a GE |
368 | if (unlikely(!ieee80211_sdata_running(sdata))) |
369 | return -ENETDOWN; | |
03e4497e | 370 | |
b203ca39 | 371 | if (WARN_ON(ether_addr_equal(sta->sta.addr, sdata->vif.addr) || |
8c71df7a GE |
372 | is_multicast_ether_addr(sta->sta.addr))) |
373 | return -EINVAL; | |
374 | ||
375 | return 0; | |
376 | } | |
377 | ||
f09603a2 JB |
378 | static int sta_info_insert_drv_state(struct ieee80211_local *local, |
379 | struct ieee80211_sub_if_data *sdata, | |
380 | struct sta_info *sta) | |
381 | { | |
382 | enum ieee80211_sta_state state; | |
383 | int err = 0; | |
384 | ||
385 | for (state = IEEE80211_STA_NOTEXIST; state < sta->sta_state; state++) { | |
386 | err = drv_sta_state(local, sdata, sta, state, state + 1); | |
387 | if (err) | |
388 | break; | |
389 | } | |
390 | ||
391 | if (!err) { | |
a4ec45a4 JB |
392 | /* |
393 | * Drivers using legacy sta_add/sta_remove callbacks only | |
394 | * get uploaded set to true after sta_add is called. | |
395 | */ | |
396 | if (!local->ops->sta_add) | |
397 | sta->uploaded = true; | |
f09603a2 JB |
398 | return 0; |
399 | } | |
400 | ||
401 | if (sdata->vif.type == NL80211_IFTYPE_ADHOC) { | |
bdcbd8e0 JB |
402 | sdata_info(sdata, |
403 | "failed to move IBSS STA %pM to state %d (%d) - keeping it anyway\n", | |
404 | sta->sta.addr, state + 1, err); | |
f09603a2 JB |
405 | err = 0; |
406 | } | |
407 | ||
408 | /* unwind on error */ | |
409 | for (; state > IEEE80211_STA_NOTEXIST; state--) | |
410 | WARN_ON(drv_sta_state(local, sdata, sta, state, state - 1)); | |
411 | ||
412 | return err; | |
413 | } | |
414 | ||
8c71df7a GE |
415 | /* |
416 | * should be called with sta_mtx locked | |
417 | * this function replaces the mutex lock | |
418 | * with a RCU lock | |
419 | */ | |
4d33960b | 420 | static int sta_info_insert_finish(struct sta_info *sta) __acquires(RCU) |
8c71df7a GE |
421 | { |
422 | struct ieee80211_local *local = sta->local; | |
423 | struct ieee80211_sub_if_data *sdata = sta->sdata; | |
7852e361 | 424 | struct station_info sinfo; |
8c71df7a GE |
425 | int err = 0; |
426 | ||
427 | lockdep_assert_held(&local->sta_mtx); | |
34e89507 | 428 | |
7852e361 JB |
429 | /* check if STA exists already */ |
430 | if (sta_info_get_bss(sdata, sta->sta.addr)) { | |
431 | err = -EEXIST; | |
432 | goto out_err; | |
4d33960b | 433 | } |
32bfd35d | 434 | |
7852e361 JB |
435 | /* notify driver */ |
436 | err = sta_info_insert_drv_state(local, sdata, sta); | |
437 | if (err) | |
438 | goto out_err; | |
4d33960b | 439 | |
7852e361 JB |
440 | local->num_sta++; |
441 | local->sta_generation++; | |
442 | smp_mb(); | |
4d33960b | 443 | |
7852e361 JB |
444 | /* make the station visible */ |
445 | sta_info_hash_add(local, sta); | |
83d5cc01 | 446 | |
794454ce | 447 | list_add_rcu(&sta->list, &local->sta_list); |
4d33960b | 448 | |
7852e361 | 449 | set_sta_flag(sta, WLAN_STA_INSERTED); |
4d33960b | 450 | |
7852e361 JB |
451 | ieee80211_sta_debugfs_add(sta); |
452 | rate_control_add_sta_debugfs(sta); | |
4d33960b | 453 | |
7852e361 JB |
454 | memset(&sinfo, 0, sizeof(sinfo)); |
455 | sinfo.filled = 0; | |
456 | sinfo.generation = local->sta_generation; | |
457 | cfg80211_new_sta(sdata->dev, sta->sta.addr, &sinfo, GFP_KERNEL); | |
d0709a65 | 458 | |
bdcbd8e0 | 459 | sta_dbg(sdata, "Inserted STA %pM\n", sta->sta.addr); |
f0706e82 | 460 | |
34e89507 JB |
461 | /* move reference to rcu-protected */ |
462 | rcu_read_lock(); | |
463 | mutex_unlock(&local->sta_mtx); | |
e9f207f0 | 464 | |
73651ee6 JB |
465 | if (ieee80211_vif_is_mesh(&sdata->vif)) |
466 | mesh_accept_plinks_update(sdata); | |
467 | ||
8c71df7a | 468 | return 0; |
4d33960b JB |
469 | out_err: |
470 | mutex_unlock(&local->sta_mtx); | |
471 | rcu_read_lock(); | |
472 | return err; | |
8c71df7a GE |
473 | } |
474 | ||
475 | int sta_info_insert_rcu(struct sta_info *sta) __acquires(RCU) | |
476 | { | |
477 | struct ieee80211_local *local = sta->local; | |
8c71df7a GE |
478 | int err = 0; |
479 | ||
4d33960b JB |
480 | might_sleep(); |
481 | ||
8c71df7a GE |
482 | err = sta_info_insert_check(sta); |
483 | if (err) { | |
484 | rcu_read_lock(); | |
485 | goto out_free; | |
486 | } | |
487 | ||
8c71df7a GE |
488 | mutex_lock(&local->sta_mtx); |
489 | ||
4d33960b | 490 | err = sta_info_insert_finish(sta); |
8c71df7a GE |
491 | if (err) |
492 | goto out_free; | |
493 | ||
73651ee6 | 494 | return 0; |
93e5deb1 JB |
495 | out_free: |
496 | BUG_ON(!err); | |
d9a7ddb0 | 497 | sta_info_free(local, sta); |
93e5deb1 | 498 | return err; |
f0706e82 JB |
499 | } |
500 | ||
34e89507 JB |
501 | int sta_info_insert(struct sta_info *sta) |
502 | { | |
503 | int err = sta_info_insert_rcu(sta); | |
504 | ||
505 | rcu_read_unlock(); | |
506 | ||
507 | return err; | |
508 | } | |
509 | ||
d012a605 | 510 | static inline void __bss_tim_set(u8 *tim, u16 id) |
004c872e JB |
511 | { |
512 | /* | |
513 | * This format has been mandated by the IEEE specifications, | |
514 | * so this line may not be changed to use the __set_bit() format. | |
515 | */ | |
d012a605 | 516 | tim[id / 8] |= (1 << (id % 8)); |
004c872e JB |
517 | } |
518 | ||
d012a605 | 519 | static inline void __bss_tim_clear(u8 *tim, u16 id) |
004c872e JB |
520 | { |
521 | /* | |
522 | * This format has been mandated by the IEEE specifications, | |
523 | * so this line may not be changed to use the __clear_bit() format. | |
524 | */ | |
d012a605 | 525 | tim[id / 8] &= ~(1 << (id % 8)); |
004c872e JB |
526 | } |
527 | ||
948d887d | 528 | static unsigned long ieee80211_tids_for_ac(int ac) |
004c872e | 529 | { |
948d887d JB |
530 | /* If we ever support TIDs > 7, this obviously needs to be adjusted */ |
531 | switch (ac) { | |
532 | case IEEE80211_AC_VO: | |
533 | return BIT(6) | BIT(7); | |
534 | case IEEE80211_AC_VI: | |
535 | return BIT(4) | BIT(5); | |
536 | case IEEE80211_AC_BE: | |
537 | return BIT(0) | BIT(3); | |
538 | case IEEE80211_AC_BK: | |
539 | return BIT(1) | BIT(2); | |
540 | default: | |
541 | WARN_ON(1); | |
542 | return 0; | |
d0709a65 | 543 | } |
004c872e JB |
544 | } |
545 | ||
c868cb35 | 546 | void sta_info_recalc_tim(struct sta_info *sta) |
004c872e | 547 | { |
c868cb35 | 548 | struct ieee80211_local *local = sta->local; |
d012a605 | 549 | struct ps_data *ps; |
d0709a65 | 550 | unsigned long flags; |
948d887d JB |
551 | bool indicate_tim = false; |
552 | u8 ignore_for_tim = sta->sta.uapsd_queues; | |
553 | int ac; | |
d012a605 MP |
554 | u16 id; |
555 | ||
556 | if (sta->sdata->vif.type == NL80211_IFTYPE_AP || | |
557 | sta->sdata->vif.type == NL80211_IFTYPE_AP_VLAN) { | |
558 | if (WARN_ON_ONCE(!sta->sdata->bss)) | |
559 | return; | |
004c872e | 560 | |
d012a605 MP |
561 | ps = &sta->sdata->bss->ps; |
562 | id = sta->sta.aid; | |
563 | } else { | |
c868cb35 | 564 | return; |
d012a605 | 565 | } |
3e122be0 | 566 | |
c868cb35 JB |
567 | /* No need to do anything if the driver does all */ |
568 | if (local->hw.flags & IEEE80211_HW_AP_LINK_PS) | |
569 | return; | |
004c872e | 570 | |
c868cb35 JB |
571 | if (sta->dead) |
572 | goto done; | |
3e122be0 | 573 | |
948d887d JB |
574 | /* |
575 | * If all ACs are delivery-enabled then we should build | |
576 | * the TIM bit for all ACs anyway; if only some are then | |
577 | * we ignore those and build the TIM bit using only the | |
578 | * non-enabled ones. | |
579 | */ | |
580 | if (ignore_for_tim == BIT(IEEE80211_NUM_ACS) - 1) | |
581 | ignore_for_tim = 0; | |
582 | ||
583 | for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) { | |
584 | unsigned long tids; | |
3e122be0 | 585 | |
948d887d JB |
586 | if (ignore_for_tim & BIT(ac)) |
587 | continue; | |
588 | ||
589 | indicate_tim |= !skb_queue_empty(&sta->tx_filtered[ac]) || | |
590 | !skb_queue_empty(&sta->ps_tx_buf[ac]); | |
591 | if (indicate_tim) | |
592 | break; | |
3e122be0 | 593 | |
948d887d JB |
594 | tids = ieee80211_tids_for_ac(ac); |
595 | ||
596 | indicate_tim |= | |
597 | sta->driver_buffered_tids & tids; | |
d0709a65 | 598 | } |
004c872e | 599 | |
c868cb35 | 600 | done: |
4d33960b | 601 | spin_lock_irqsave(&local->tim_lock, flags); |
004c872e | 602 | |
948d887d | 603 | if (indicate_tim) |
d012a605 | 604 | __bss_tim_set(ps->tim, id); |
c868cb35 | 605 | else |
d012a605 | 606 | __bss_tim_clear(ps->tim, id); |
004c872e | 607 | |
c868cb35 JB |
608 | if (local->ops->set_tim) { |
609 | local->tim_in_locked_section = true; | |
948d887d | 610 | drv_set_tim(local, &sta->sta, indicate_tim); |
c868cb35 JB |
611 | local->tim_in_locked_section = false; |
612 | } | |
3e122be0 | 613 | |
4d33960b | 614 | spin_unlock_irqrestore(&local->tim_lock, flags); |
004c872e JB |
615 | } |
616 | ||
cd0b8d89 | 617 | static bool sta_info_buffer_expired(struct sta_info *sta, struct sk_buff *skb) |
f0706e82 | 618 | { |
e039fa4a | 619 | struct ieee80211_tx_info *info; |
f0706e82 JB |
620 | int timeout; |
621 | ||
622 | if (!skb) | |
cd0b8d89 | 623 | return false; |
f0706e82 | 624 | |
e039fa4a | 625 | info = IEEE80211_SKB_CB(skb); |
f0706e82 JB |
626 | |
627 | /* Timeout: (2 * listen_interval * beacon_int * 1024 / 1000000) sec */ | |
57c4d7b4 JB |
628 | timeout = (sta->listen_interval * |
629 | sta->sdata->vif.bss_conf.beacon_int * | |
630 | 32 / 15625) * HZ; | |
f0706e82 JB |
631 | if (timeout < STA_TX_BUFFER_EXPIRE) |
632 | timeout = STA_TX_BUFFER_EXPIRE; | |
e039fa4a | 633 | return time_after(jiffies, info->control.jiffies + timeout); |
f0706e82 JB |
634 | } |
635 | ||
636 | ||
948d887d JB |
637 | static bool sta_info_cleanup_expire_buffered_ac(struct ieee80211_local *local, |
638 | struct sta_info *sta, int ac) | |
f0706e82 JB |
639 | { |
640 | unsigned long flags; | |
641 | struct sk_buff *skb; | |
642 | ||
60750397 JB |
643 | /* |
644 | * First check for frames that should expire on the filtered | |
645 | * queue. Frames here were rejected by the driver and are on | |
646 | * a separate queue to avoid reordering with normal PS-buffered | |
647 | * frames. They also aren't accounted for right now in the | |
648 | * total_ps_buffered counter. | |
649 | */ | |
650 | for (;;) { | |
948d887d JB |
651 | spin_lock_irqsave(&sta->tx_filtered[ac].lock, flags); |
652 | skb = skb_peek(&sta->tx_filtered[ac]); | |
60750397 | 653 | if (sta_info_buffer_expired(sta, skb)) |
948d887d | 654 | skb = __skb_dequeue(&sta->tx_filtered[ac]); |
60750397 JB |
655 | else |
656 | skb = NULL; | |
948d887d | 657 | spin_unlock_irqrestore(&sta->tx_filtered[ac].lock, flags); |
60750397 JB |
658 | |
659 | /* | |
660 | * Frames are queued in order, so if this one | |
661 | * hasn't expired yet we can stop testing. If | |
662 | * we actually reached the end of the queue we | |
663 | * also need to stop, of course. | |
664 | */ | |
665 | if (!skb) | |
666 | break; | |
d4fa14cd | 667 | ieee80211_free_txskb(&local->hw, skb); |
60750397 JB |
668 | } |
669 | ||
670 | /* | |
671 | * Now also check the normal PS-buffered queue, this will | |
672 | * only find something if the filtered queue was emptied | |
673 | * since the filtered frames are all before the normal PS | |
674 | * buffered frames. | |
675 | */ | |
f0706e82 | 676 | for (;;) { |
948d887d JB |
677 | spin_lock_irqsave(&sta->ps_tx_buf[ac].lock, flags); |
678 | skb = skb_peek(&sta->ps_tx_buf[ac]); | |
57c4d7b4 | 679 | if (sta_info_buffer_expired(sta, skb)) |
948d887d | 680 | skb = __skb_dequeue(&sta->ps_tx_buf[ac]); |
836341a7 | 681 | else |
f0706e82 | 682 | skb = NULL; |
948d887d | 683 | spin_unlock_irqrestore(&sta->ps_tx_buf[ac].lock, flags); |
f0706e82 | 684 | |
60750397 JB |
685 | /* |
686 | * frames are queued in order, so if this one | |
687 | * hasn't expired yet (or we reached the end of | |
688 | * the queue) we can stop testing | |
689 | */ | |
836341a7 | 690 | if (!skb) |
f0706e82 | 691 | break; |
836341a7 | 692 | |
836341a7 | 693 | local->total_ps_buffered--; |
bdcbd8e0 JB |
694 | ps_dbg(sta->sdata, "Buffered frame expired (STA %pM)\n", |
695 | sta->sta.addr); | |
d4fa14cd | 696 | ieee80211_free_txskb(&local->hw, skb); |
f0706e82 | 697 | } |
3393a608 | 698 | |
60750397 JB |
699 | /* |
700 | * Finally, recalculate the TIM bit for this station -- it might | |
701 | * now be clear because the station was too slow to retrieve its | |
702 | * frames. | |
703 | */ | |
704 | sta_info_recalc_tim(sta); | |
705 | ||
706 | /* | |
707 | * Return whether there are any frames still buffered, this is | |
708 | * used to check whether the cleanup timer still needs to run, | |
709 | * if there are no frames we don't need to rearm the timer. | |
710 | */ | |
948d887d JB |
711 | return !(skb_queue_empty(&sta->ps_tx_buf[ac]) && |
712 | skb_queue_empty(&sta->tx_filtered[ac])); | |
713 | } | |
714 | ||
715 | static bool sta_info_cleanup_expire_buffered(struct ieee80211_local *local, | |
716 | struct sta_info *sta) | |
717 | { | |
718 | bool have_buffered = false; | |
719 | int ac; | |
720 | ||
721 | /* This is only necessary for stations on BSS interfaces */ | |
722 | if (!sta->sdata->bss) | |
723 | return false; | |
724 | ||
725 | for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) | |
726 | have_buffered |= | |
727 | sta_info_cleanup_expire_buffered_ac(local, sta, ac); | |
728 | ||
729 | return have_buffered; | |
f0706e82 JB |
730 | } |
731 | ||
83d5cc01 | 732 | int __must_check __sta_info_destroy(struct sta_info *sta) |
f0706e82 | 733 | { |
34e89507 JB |
734 | struct ieee80211_local *local; |
735 | struct ieee80211_sub_if_data *sdata; | |
b22cfcfc | 736 | int ret, i; |
f0706e82 | 737 | |
34e89507 | 738 | might_sleep(); |
f0706e82 | 739 | |
34e89507 JB |
740 | if (!sta) |
741 | return -ENOENT; | |
5bb644a0 | 742 | |
34e89507 JB |
743 | local = sta->local; |
744 | sdata = sta->sdata; | |
f0706e82 | 745 | |
83d5cc01 JB |
746 | lockdep_assert_held(&local->sta_mtx); |
747 | ||
098a6070 JB |
748 | /* |
749 | * Before removing the station from the driver and | |
750 | * rate control, it might still start new aggregation | |
751 | * sessions -- block that to make sure the tear-down | |
752 | * will be sufficient. | |
753 | */ | |
c2c98fde | 754 | set_sta_flag(sta, WLAN_STA_BLOCK_BA); |
582bb505 | 755 | ieee80211_sta_tear_down_BA_sessions(sta, false); |
098a6070 | 756 | |
34e89507 | 757 | ret = sta_info_hash_del(local, sta); |
34e89507 JB |
758 | if (ret) |
759 | return ret; | |
760 | ||
794454ce | 761 | list_del_rcu(&sta->list); |
4d33960b | 762 | |
8cb23153 | 763 | mutex_lock(&local->key_mtx); |
e31b8213 | 764 | for (i = 0; i < NUM_DEFAULT_KEYS; i++) |
40b275b6 | 765 | __ieee80211_key_free(key_mtx_dereference(local, sta->gtk[i])); |
e31b8213 | 766 | if (sta->ptk) |
40b275b6 | 767 | __ieee80211_key_free(key_mtx_dereference(local, sta->ptk)); |
8cb23153 | 768 | mutex_unlock(&local->key_mtx); |
34e89507 JB |
769 | |
770 | sta->dead = true; | |
771 | ||
34e89507 JB |
772 | local->num_sta--; |
773 | local->sta_generation++; | |
774 | ||
775 | if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) | |
a9b3cd7f | 776 | RCU_INIT_POINTER(sdata->u.vlan.sta, NULL); |
34e89507 | 777 | |
83d5cc01 | 778 | while (sta->sta_state > IEEE80211_STA_NONE) { |
f09603a2 JB |
779 | ret = sta_info_move_state(sta, sta->sta_state - 1); |
780 | if (ret) { | |
83d5cc01 JB |
781 | WARN_ON_ONCE(1); |
782 | break; | |
783 | } | |
784 | } | |
d9a7ddb0 | 785 | |
f09603a2 | 786 | if (sta->uploaded) { |
f09603a2 JB |
787 | ret = drv_sta_state(local, sdata, sta, IEEE80211_STA_NONE, |
788 | IEEE80211_STA_NOTEXIST); | |
789 | WARN_ON_ONCE(ret != 0); | |
790 | } | |
34e89507 | 791 | |
bdcbd8e0 JB |
792 | sta_dbg(sdata, "Removed STA %pM\n", sta->sta.addr); |
793 | ||
ec15e68b JM |
794 | cfg80211_del_sta(sdata->dev, sta->sta.addr, GFP_KERNEL); |
795 | ||
34e89507 JB |
796 | rate_control_remove_sta_debugfs(sta); |
797 | ieee80211_sta_debugfs_remove(sta); | |
798 | ||
b22cfcfc | 799 | call_rcu(&sta->rcu_head, free_sta_rcu); |
34e89507 JB |
800 | |
801 | return 0; | |
4d6141c3 JS |
802 | } |
803 | ||
34e89507 | 804 | int sta_info_destroy_addr(struct ieee80211_sub_if_data *sdata, const u8 *addr) |
4d6141c3 | 805 | { |
34e89507 JB |
806 | struct sta_info *sta; |
807 | int ret; | |
4d6141c3 | 808 | |
34e89507 | 809 | mutex_lock(&sdata->local->sta_mtx); |
7852e361 | 810 | sta = sta_info_get(sdata, addr); |
34e89507 JB |
811 | ret = __sta_info_destroy(sta); |
812 | mutex_unlock(&sdata->local->sta_mtx); | |
4d6141c3 JS |
813 | |
814 | return ret; | |
815 | } | |
816 | ||
34e89507 JB |
817 | int sta_info_destroy_addr_bss(struct ieee80211_sub_if_data *sdata, |
818 | const u8 *addr) | |
e9f207f0 | 819 | { |
34e89507 JB |
820 | struct sta_info *sta; |
821 | int ret; | |
e9f207f0 | 822 | |
34e89507 | 823 | mutex_lock(&sdata->local->sta_mtx); |
7852e361 | 824 | sta = sta_info_get_bss(sdata, addr); |
34e89507 JB |
825 | ret = __sta_info_destroy(sta); |
826 | mutex_unlock(&sdata->local->sta_mtx); | |
d0709a65 | 827 | |
34e89507 JB |
828 | return ret; |
829 | } | |
e9f207f0 | 830 | |
34e89507 JB |
831 | static void sta_info_cleanup(unsigned long data) |
832 | { | |
833 | struct ieee80211_local *local = (struct ieee80211_local *) data; | |
834 | struct sta_info *sta; | |
3393a608 | 835 | bool timer_needed = false; |
34e89507 JB |
836 | |
837 | rcu_read_lock(); | |
838 | list_for_each_entry_rcu(sta, &local->sta_list, list) | |
3393a608 JO |
839 | if (sta_info_cleanup_expire_buffered(local, sta)) |
840 | timer_needed = true; | |
34e89507 | 841 | rcu_read_unlock(); |
e9f207f0 | 842 | |
34e89507 JB |
843 | if (local->quiescing) |
844 | return; | |
d0709a65 | 845 | |
3393a608 JO |
846 | if (!timer_needed) |
847 | return; | |
848 | ||
26d59535 JB |
849 | mod_timer(&local->sta_cleanup, |
850 | round_jiffies(jiffies + STA_INFO_CLEANUP_INTERVAL)); | |
e9f207f0 | 851 | } |
e9f207f0 | 852 | |
f0706e82 JB |
853 | void sta_info_init(struct ieee80211_local *local) |
854 | { | |
4d33960b | 855 | spin_lock_init(&local->tim_lock); |
34e89507 | 856 | mutex_init(&local->sta_mtx); |
f0706e82 | 857 | INIT_LIST_HEAD(&local->sta_list); |
f0706e82 | 858 | |
b24b8a24 PE |
859 | setup_timer(&local->sta_cleanup, sta_info_cleanup, |
860 | (unsigned long)local); | |
f0706e82 JB |
861 | } |
862 | ||
863 | void sta_info_stop(struct ieee80211_local *local) | |
864 | { | |
f0706e82 | 865 | del_timer(&local->sta_cleanup); |
be8755e1 | 866 | sta_info_flush(local, NULL); |
f0706e82 JB |
867 | } |
868 | ||
f0706e82 JB |
869 | /** |
870 | * sta_info_flush - flush matching STA entries from the STA table | |
44213b5e JB |
871 | * |
872 | * Returns the number of removed STA entries. | |
873 | * | |
f0706e82 | 874 | * @local: local interface data |
d0709a65 | 875 | * @sdata: matching rule for the net device (sta->dev) or %NULL to match all STAs |
f0706e82 | 876 | */ |
44213b5e | 877 | int sta_info_flush(struct ieee80211_local *local, |
af8cdcd8 | 878 | struct ieee80211_sub_if_data *sdata) |
f0706e82 JB |
879 | { |
880 | struct sta_info *sta, *tmp; | |
44213b5e | 881 | int ret = 0; |
f0706e82 | 882 | |
d0709a65 | 883 | might_sleep(); |
be8755e1 | 884 | |
34e89507 | 885 | mutex_lock(&local->sta_mtx); |
d0709a65 | 886 | list_for_each_entry_safe(sta, tmp, &local->sta_list, list) { |
34316837 | 887 | if (!sdata || sdata == sta->sdata) { |
34e89507 | 888 | WARN_ON(__sta_info_destroy(sta)); |
34316837 JB |
889 | ret++; |
890 | } | |
be8755e1 | 891 | } |
34e89507 | 892 | mutex_unlock(&local->sta_mtx); |
44213b5e JB |
893 | |
894 | return ret; | |
f0706e82 | 895 | } |
dc6676b7 | 896 | |
24723d1b JB |
897 | void ieee80211_sta_expire(struct ieee80211_sub_if_data *sdata, |
898 | unsigned long exp_time) | |
899 | { | |
900 | struct ieee80211_local *local = sdata->local; | |
901 | struct sta_info *sta, *tmp; | |
24723d1b | 902 | |
34e89507 | 903 | mutex_lock(&local->sta_mtx); |
e46a2cf9 MSS |
904 | |
905 | list_for_each_entry_safe(sta, tmp, &local->sta_list, list) { | |
ec2b774e ML |
906 | if (sdata != sta->sdata) |
907 | continue; | |
908 | ||
24723d1b | 909 | if (time_after(jiffies, sta->last_rx + exp_time)) { |
eea57d42 MSS |
910 | sta_dbg(sta->sdata, "expiring inactive STA %pM\n", |
911 | sta->sta.addr); | |
34e89507 | 912 | WARN_ON(__sta_info_destroy(sta)); |
24723d1b | 913 | } |
e46a2cf9 MSS |
914 | } |
915 | ||
34e89507 | 916 | mutex_unlock(&local->sta_mtx); |
24723d1b | 917 | } |
17741cdc | 918 | |
686b9cb9 BG |
919 | struct ieee80211_sta *ieee80211_find_sta_by_ifaddr(struct ieee80211_hw *hw, |
920 | const u8 *addr, | |
921 | const u8 *localaddr) | |
17741cdc | 922 | { |
abe60632 | 923 | struct sta_info *sta, *nxt; |
17741cdc | 924 | |
686b9cb9 BG |
925 | /* |
926 | * Just return a random station if localaddr is NULL | |
927 | * ... first in list. | |
928 | */ | |
f7c65594 | 929 | for_each_sta_info(hw_to_local(hw), addr, sta, nxt) { |
686b9cb9 | 930 | if (localaddr && |
b203ca39 | 931 | !ether_addr_equal(sta->sdata->vif.addr, localaddr)) |
686b9cb9 | 932 | continue; |
f7c65594 JB |
933 | if (!sta->uploaded) |
934 | return NULL; | |
abe60632 | 935 | return &sta->sta; |
f7c65594 JB |
936 | } |
937 | ||
abe60632 | 938 | return NULL; |
17741cdc | 939 | } |
686b9cb9 | 940 | EXPORT_SYMBOL_GPL(ieee80211_find_sta_by_ifaddr); |
5ed176e1 JB |
941 | |
942 | struct ieee80211_sta *ieee80211_find_sta(struct ieee80211_vif *vif, | |
943 | const u8 *addr) | |
944 | { | |
f7c65594 | 945 | struct sta_info *sta; |
5ed176e1 JB |
946 | |
947 | if (!vif) | |
948 | return NULL; | |
949 | ||
f7c65594 JB |
950 | sta = sta_info_get_bss(vif_to_sdata(vif), addr); |
951 | if (!sta) | |
952 | return NULL; | |
953 | ||
954 | if (!sta->uploaded) | |
955 | return NULL; | |
5ed176e1 | 956 | |
f7c65594 | 957 | return &sta->sta; |
5ed176e1 | 958 | } |
17741cdc | 959 | EXPORT_SYMBOL(ieee80211_find_sta); |
af818581 | 960 | |
50a9432d JB |
961 | static void clear_sta_ps_flags(void *_sta) |
962 | { | |
963 | struct sta_info *sta = _sta; | |
608383bf | 964 | struct ieee80211_sub_if_data *sdata = sta->sdata; |
d012a605 MP |
965 | struct ps_data *ps; |
966 | ||
967 | if (sdata->vif.type == NL80211_IFTYPE_AP || | |
968 | sdata->vif.type == NL80211_IFTYPE_AP_VLAN) | |
969 | ps = &sdata->bss->ps; | |
970 | else | |
971 | return; | |
50a9432d | 972 | |
c2c98fde | 973 | clear_sta_flag(sta, WLAN_STA_PS_DRIVER); |
608383bf | 974 | if (test_and_clear_sta_flag(sta, WLAN_STA_PS_STA)) |
d012a605 | 975 | atomic_dec(&ps->num_sta_ps); |
50a9432d JB |
976 | } |
977 | ||
af818581 JB |
978 | /* powersave support code */ |
979 | void ieee80211_sta_ps_deliver_wakeup(struct sta_info *sta) | |
980 | { | |
981 | struct ieee80211_sub_if_data *sdata = sta->sdata; | |
982 | struct ieee80211_local *local = sdata->local; | |
948d887d JB |
983 | struct sk_buff_head pending; |
984 | int filtered = 0, buffered = 0, ac; | |
987c285c | 985 | unsigned long flags; |
948d887d | 986 | |
c2c98fde | 987 | clear_sta_flag(sta, WLAN_STA_SP); |
47086fc5 | 988 | |
5a306f58 | 989 | BUILD_BUG_ON(BITS_TO_LONGS(IEEE80211_NUM_TIDS) > 1); |
948d887d | 990 | sta->driver_buffered_tids = 0; |
af818581 | 991 | |
d057e5a3 AN |
992 | if (!(local->hw.flags & IEEE80211_HW_AP_LINK_PS)) |
993 | drv_sta_notify(local, sdata, STA_NOTIFY_AWAKE, &sta->sta); | |
af818581 | 994 | |
948d887d | 995 | skb_queue_head_init(&pending); |
af818581 JB |
996 | |
997 | /* Send all buffered frames to the station */ | |
948d887d JB |
998 | for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) { |
999 | int count = skb_queue_len(&pending), tmp; | |
1000 | ||
987c285c | 1001 | spin_lock_irqsave(&sta->tx_filtered[ac].lock, flags); |
948d887d | 1002 | skb_queue_splice_tail_init(&sta->tx_filtered[ac], &pending); |
987c285c | 1003 | spin_unlock_irqrestore(&sta->tx_filtered[ac].lock, flags); |
948d887d JB |
1004 | tmp = skb_queue_len(&pending); |
1005 | filtered += tmp - count; | |
1006 | count = tmp; | |
1007 | ||
987c285c | 1008 | spin_lock_irqsave(&sta->ps_tx_buf[ac].lock, flags); |
948d887d | 1009 | skb_queue_splice_tail_init(&sta->ps_tx_buf[ac], &pending); |
987c285c | 1010 | spin_unlock_irqrestore(&sta->ps_tx_buf[ac].lock, flags); |
948d887d JB |
1011 | tmp = skb_queue_len(&pending); |
1012 | buffered += tmp - count; | |
1013 | } | |
1014 | ||
1015 | ieee80211_add_pending_skbs_fn(local, &pending, clear_sta_ps_flags, sta); | |
1016 | ||
af818581 JB |
1017 | local->total_ps_buffered -= buffered; |
1018 | ||
c868cb35 JB |
1019 | sta_info_recalc_tim(sta); |
1020 | ||
bdcbd8e0 JB |
1021 | ps_dbg(sdata, |
1022 | "STA %pM aid %d sending %d filtered/%d PS frames since STA not sleeping anymore\n", | |
1023 | sta->sta.addr, sta->sta.aid, filtered, buffered); | |
af818581 JB |
1024 | } |
1025 | ||
ce662b44 JB |
1026 | static void ieee80211_send_null_response(struct ieee80211_sub_if_data *sdata, |
1027 | struct sta_info *sta, int tid, | |
40b96408 | 1028 | enum ieee80211_frame_release_type reason) |
af818581 | 1029 | { |
af818581 | 1030 | struct ieee80211_local *local = sdata->local; |
ce662b44 | 1031 | struct ieee80211_qos_hdr *nullfunc; |
af818581 | 1032 | struct sk_buff *skb; |
ce662b44 JB |
1033 | int size = sizeof(*nullfunc); |
1034 | __le16 fc; | |
c2c98fde | 1035 | bool qos = test_sta_flag(sta, WLAN_STA_WME); |
ce662b44 | 1036 | struct ieee80211_tx_info *info; |
55de908a | 1037 | struct ieee80211_chanctx_conf *chanctx_conf; |
af818581 | 1038 | |
ce662b44 JB |
1039 | if (qos) { |
1040 | fc = cpu_to_le16(IEEE80211_FTYPE_DATA | | |
1041 | IEEE80211_STYPE_QOS_NULLFUNC | | |
1042 | IEEE80211_FCTL_FROMDS); | |
1043 | } else { | |
1044 | size -= 2; | |
1045 | fc = cpu_to_le16(IEEE80211_FTYPE_DATA | | |
1046 | IEEE80211_STYPE_NULLFUNC | | |
1047 | IEEE80211_FCTL_FROMDS); | |
af818581 | 1048 | } |
af818581 | 1049 | |
ce662b44 JB |
1050 | skb = dev_alloc_skb(local->hw.extra_tx_headroom + size); |
1051 | if (!skb) | |
1052 | return; | |
1053 | ||
1054 | skb_reserve(skb, local->hw.extra_tx_headroom); | |
1055 | ||
1056 | nullfunc = (void *) skb_put(skb, size); | |
1057 | nullfunc->frame_control = fc; | |
1058 | nullfunc->duration_id = 0; | |
1059 | memcpy(nullfunc->addr1, sta->sta.addr, ETH_ALEN); | |
1060 | memcpy(nullfunc->addr2, sdata->vif.addr, ETH_ALEN); | |
1061 | memcpy(nullfunc->addr3, sdata->vif.addr, ETH_ALEN); | |
1062 | ||
59b66255 JB |
1063 | skb->priority = tid; |
1064 | skb_set_queue_mapping(skb, ieee802_1d_to_ac[tid]); | |
ce662b44 | 1065 | if (qos) { |
ce662b44 JB |
1066 | nullfunc->qos_ctrl = cpu_to_le16(tid); |
1067 | ||
40b96408 | 1068 | if (reason == IEEE80211_FRAME_RELEASE_UAPSD) |
ce662b44 JB |
1069 | nullfunc->qos_ctrl |= |
1070 | cpu_to_le16(IEEE80211_QOS_CTL_EOSP); | |
1071 | } | |
1072 | ||
1073 | info = IEEE80211_SKB_CB(skb); | |
1074 | ||
1075 | /* | |
1076 | * Tell TX path to send this frame even though the | |
1077 | * STA may still remain is PS mode after this frame | |
deeaee19 JB |
1078 | * exchange. Also set EOSP to indicate this packet |
1079 | * ends the poll/service period. | |
ce662b44 | 1080 | */ |
02f2f1a9 | 1081 | info->flags |= IEEE80211_TX_CTL_NO_PS_BUFFER | |
deeaee19 JB |
1082 | IEEE80211_TX_STATUS_EOSP | |
1083 | IEEE80211_TX_CTL_REQ_TX_STATUS; | |
ce662b44 | 1084 | |
40b96408 JB |
1085 | drv_allow_buffered_frames(local, sta, BIT(tid), 1, reason, false); |
1086 | ||
55de908a JB |
1087 | rcu_read_lock(); |
1088 | chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf); | |
1089 | if (WARN_ON(!chanctx_conf)) { | |
1090 | rcu_read_unlock(); | |
1091 | kfree_skb(skb); | |
1092 | return; | |
1093 | } | |
1094 | ||
4bf88530 | 1095 | ieee80211_xmit(sdata, skb, chanctx_conf->def.chan->band); |
55de908a | 1096 | rcu_read_unlock(); |
ce662b44 JB |
1097 | } |
1098 | ||
47086fc5 JB |
1099 | static void |
1100 | ieee80211_sta_ps_deliver_response(struct sta_info *sta, | |
1101 | int n_frames, u8 ignored_acs, | |
1102 | enum ieee80211_frame_release_type reason) | |
af818581 JB |
1103 | { |
1104 | struct ieee80211_sub_if_data *sdata = sta->sdata; | |
1105 | struct ieee80211_local *local = sdata->local; | |
4049e09a | 1106 | bool found = false; |
948d887d JB |
1107 | bool more_data = false; |
1108 | int ac; | |
4049e09a | 1109 | unsigned long driver_release_tids = 0; |
47086fc5 | 1110 | struct sk_buff_head frames; |
af818581 | 1111 | |
deeaee19 | 1112 | /* Service or PS-Poll period starts */ |
c2c98fde | 1113 | set_sta_flag(sta, WLAN_STA_SP); |
deeaee19 | 1114 | |
47086fc5 | 1115 | __skb_queue_head_init(&frames); |
948d887d JB |
1116 | |
1117 | /* | |
47086fc5 | 1118 | * Get response frame(s) and more data bit for it. |
948d887d JB |
1119 | */ |
1120 | for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) { | |
4049e09a JB |
1121 | unsigned long tids; |
1122 | ||
47086fc5 | 1123 | if (ignored_acs & BIT(ac)) |
948d887d JB |
1124 | continue; |
1125 | ||
4049e09a JB |
1126 | tids = ieee80211_tids_for_ac(ac); |
1127 | ||
1128 | if (!found) { | |
1129 | driver_release_tids = sta->driver_buffered_tids & tids; | |
1130 | if (driver_release_tids) { | |
1131 | found = true; | |
1132 | } else { | |
47086fc5 JB |
1133 | struct sk_buff *skb; |
1134 | ||
1135 | while (n_frames > 0) { | |
1136 | skb = skb_dequeue(&sta->tx_filtered[ac]); | |
1137 | if (!skb) { | |
1138 | skb = skb_dequeue( | |
1139 | &sta->ps_tx_buf[ac]); | |
1140 | if (skb) | |
1141 | local->total_ps_buffered--; | |
1142 | } | |
1143 | if (!skb) | |
1144 | break; | |
1145 | n_frames--; | |
4049e09a | 1146 | found = true; |
47086fc5 JB |
1147 | __skb_queue_tail(&frames, skb); |
1148 | } | |
948d887d | 1149 | } |
948d887d | 1150 | |
4049e09a JB |
1151 | /* |
1152 | * If the driver has data on more than one TID then | |
1153 | * certainly there's more data if we release just a | |
1154 | * single frame now (from a single TID). | |
1155 | */ | |
47086fc5 JB |
1156 | if (reason == IEEE80211_FRAME_RELEASE_PSPOLL && |
1157 | hweight16(driver_release_tids) > 1) { | |
4049e09a JB |
1158 | more_data = true; |
1159 | driver_release_tids = | |
1160 | BIT(ffs(driver_release_tids) - 1); | |
1161 | break; | |
1162 | } | |
1163 | } | |
948d887d JB |
1164 | |
1165 | if (!skb_queue_empty(&sta->tx_filtered[ac]) || | |
1166 | !skb_queue_empty(&sta->ps_tx_buf[ac])) { | |
1167 | more_data = true; | |
1168 | break; | |
1169 | } | |
af818581 | 1170 | } |
af818581 | 1171 | |
4049e09a | 1172 | if (!found) { |
ce662b44 | 1173 | int tid; |
af818581 JB |
1174 | |
1175 | /* | |
ce662b44 JB |
1176 | * For PS-Poll, this can only happen due to a race condition |
1177 | * when we set the TIM bit and the station notices it, but | |
1178 | * before it can poll for the frame we expire it. | |
1179 | * | |
1180 | * For uAPSD, this is said in the standard (11.2.1.5 h): | |
1181 | * At each unscheduled SP for a non-AP STA, the AP shall | |
1182 | * attempt to transmit at least one MSDU or MMPDU, but no | |
1183 | * more than the value specified in the Max SP Length field | |
1184 | * in the QoS Capability element from delivery-enabled ACs, | |
1185 | * that are destined for the non-AP STA. | |
1186 | * | |
1187 | * Since we have no other MSDU/MMPDU, transmit a QoS null frame. | |
af818581 | 1188 | */ |
af818581 | 1189 | |
ce662b44 JB |
1190 | /* This will evaluate to 1, 3, 5 or 7. */ |
1191 | tid = 7 - ((ffs(~ignored_acs) - 1) << 1); | |
af818581 | 1192 | |
40b96408 | 1193 | ieee80211_send_null_response(sdata, sta, tid, reason); |
4049e09a JB |
1194 | return; |
1195 | } | |
af818581 | 1196 | |
47086fc5 JB |
1197 | if (!driver_release_tids) { |
1198 | struct sk_buff_head pending; | |
1199 | struct sk_buff *skb; | |
40b96408 JB |
1200 | int num = 0; |
1201 | u16 tids = 0; | |
af818581 | 1202 | |
47086fc5 | 1203 | skb_queue_head_init(&pending); |
af818581 | 1204 | |
47086fc5 JB |
1205 | while ((skb = __skb_dequeue(&frames))) { |
1206 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); | |
1207 | struct ieee80211_hdr *hdr = (void *) skb->data; | |
40b96408 JB |
1208 | u8 *qoshdr = NULL; |
1209 | ||
1210 | num++; | |
af818581 | 1211 | |
47086fc5 JB |
1212 | /* |
1213 | * Tell TX path to send this frame even though the | |
1214 | * STA may still remain is PS mode after this frame | |
1215 | * exchange. | |
1216 | */ | |
02f2f1a9 | 1217 | info->flags |= IEEE80211_TX_CTL_NO_PS_BUFFER; |
47086fc5 JB |
1218 | |
1219 | /* | |
1220 | * Use MoreData flag to indicate whether there are | |
1221 | * more buffered frames for this STA | |
1222 | */ | |
24b9c373 | 1223 | if (more_data || !skb_queue_empty(&frames)) |
47086fc5 JB |
1224 | hdr->frame_control |= |
1225 | cpu_to_le16(IEEE80211_FCTL_MOREDATA); | |
24b9c373 JD |
1226 | else |
1227 | hdr->frame_control &= | |
1228 | cpu_to_le16(~IEEE80211_FCTL_MOREDATA); | |
47086fc5 | 1229 | |
40b96408 JB |
1230 | if (ieee80211_is_data_qos(hdr->frame_control) || |
1231 | ieee80211_is_qos_nullfunc(hdr->frame_control)) | |
1232 | qoshdr = ieee80211_get_qos_ctl(hdr); | |
1233 | ||
52a3f20c MP |
1234 | /* end service period after last frame */ |
1235 | if (skb_queue_empty(&frames)) { | |
1236 | if (reason == IEEE80211_FRAME_RELEASE_UAPSD && | |
1237 | qoshdr) | |
1238 | *qoshdr |= IEEE80211_QOS_CTL_EOSP; | |
1239 | ||
1240 | info->flags |= IEEE80211_TX_STATUS_EOSP | | |
1241 | IEEE80211_TX_CTL_REQ_TX_STATUS; | |
1242 | } | |
deeaee19 | 1243 | |
40b96408 JB |
1244 | if (qoshdr) |
1245 | tids |= BIT(*qoshdr & IEEE80211_QOS_CTL_TID_MASK); | |
1246 | else | |
1247 | tids |= BIT(0); | |
1248 | ||
47086fc5 JB |
1249 | __skb_queue_tail(&pending, skb); |
1250 | } | |
af818581 | 1251 | |
40b96408 JB |
1252 | drv_allow_buffered_frames(local, sta, tids, num, |
1253 | reason, more_data); | |
1254 | ||
47086fc5 | 1255 | ieee80211_add_pending_skbs(local, &pending); |
af818581 | 1256 | |
c868cb35 | 1257 | sta_info_recalc_tim(sta); |
af818581 JB |
1258 | } else { |
1259 | /* | |
4049e09a JB |
1260 | * We need to release a frame that is buffered somewhere in the |
1261 | * driver ... it'll have to handle that. | |
1262 | * Note that, as per the comment above, it'll also have to see | |
1263 | * if there is more than just one frame on the specific TID that | |
1264 | * we're releasing from, and it needs to set the more-data bit | |
1265 | * accordingly if we tell it that there's no more data. If we do | |
1266 | * tell it there's more data, then of course the more-data bit | |
1267 | * needs to be set anyway. | |
1268 | */ | |
1269 | drv_release_buffered_frames(local, sta, driver_release_tids, | |
47086fc5 | 1270 | n_frames, reason, more_data); |
4049e09a JB |
1271 | |
1272 | /* | |
1273 | * Note that we don't recalculate the TIM bit here as it would | |
1274 | * most likely have no effect at all unless the driver told us | |
1275 | * that the TID became empty before returning here from the | |
1276 | * release function. | |
1277 | * Either way, however, when the driver tells us that the TID | |
1278 | * became empty we'll do the TIM recalculation. | |
af818581 | 1279 | */ |
af818581 JB |
1280 | } |
1281 | } | |
1282 | ||
47086fc5 JB |
1283 | void ieee80211_sta_ps_deliver_poll_response(struct sta_info *sta) |
1284 | { | |
1285 | u8 ignore_for_response = sta->sta.uapsd_queues; | |
1286 | ||
1287 | /* | |
1288 | * If all ACs are delivery-enabled then we should reply | |
1289 | * from any of them, if only some are enabled we reply | |
1290 | * only from the non-enabled ones. | |
1291 | */ | |
1292 | if (ignore_for_response == BIT(IEEE80211_NUM_ACS) - 1) | |
1293 | ignore_for_response = 0; | |
1294 | ||
1295 | ieee80211_sta_ps_deliver_response(sta, 1, ignore_for_response, | |
1296 | IEEE80211_FRAME_RELEASE_PSPOLL); | |
1297 | } | |
1298 | ||
1299 | void ieee80211_sta_ps_deliver_uapsd(struct sta_info *sta) | |
1300 | { | |
1301 | int n_frames = sta->sta.max_sp; | |
1302 | u8 delivery_enabled = sta->sta.uapsd_queues; | |
1303 | ||
1304 | /* | |
1305 | * If we ever grow support for TSPEC this might happen if | |
1306 | * the TSPEC update from hostapd comes in between a trigger | |
1307 | * frame setting WLAN_STA_UAPSD in the RX path and this | |
1308 | * actually getting called. | |
1309 | */ | |
1310 | if (!delivery_enabled) | |
1311 | return; | |
1312 | ||
47086fc5 JB |
1313 | switch (sta->sta.max_sp) { |
1314 | case 1: | |
1315 | n_frames = 2; | |
1316 | break; | |
1317 | case 2: | |
1318 | n_frames = 4; | |
1319 | break; | |
1320 | case 3: | |
1321 | n_frames = 6; | |
1322 | break; | |
1323 | case 0: | |
1324 | /* XXX: what is a good value? */ | |
1325 | n_frames = 8; | |
1326 | break; | |
1327 | } | |
1328 | ||
1329 | ieee80211_sta_ps_deliver_response(sta, n_frames, ~delivery_enabled, | |
1330 | IEEE80211_FRAME_RELEASE_UAPSD); | |
1331 | } | |
1332 | ||
af818581 JB |
1333 | void ieee80211_sta_block_awake(struct ieee80211_hw *hw, |
1334 | struct ieee80211_sta *pubsta, bool block) | |
1335 | { | |
1336 | struct sta_info *sta = container_of(pubsta, struct sta_info, sta); | |
1337 | ||
b5878a2d JB |
1338 | trace_api_sta_block_awake(sta->local, pubsta, block); |
1339 | ||
af818581 | 1340 | if (block) |
c2c98fde JB |
1341 | set_sta_flag(sta, WLAN_STA_PS_DRIVER); |
1342 | else if (test_sta_flag(sta, WLAN_STA_PS_DRIVER)) | |
af818581 JB |
1343 | ieee80211_queue_work(hw, &sta->drv_unblock_wk); |
1344 | } | |
1345 | EXPORT_SYMBOL(ieee80211_sta_block_awake); | |
dcf55fb5 | 1346 | |
37fbd908 JB |
1347 | void ieee80211_sta_eosp_irqsafe(struct ieee80211_sta *pubsta) |
1348 | { | |
1349 | struct sta_info *sta = container_of(pubsta, struct sta_info, sta); | |
1350 | struct ieee80211_local *local = sta->local; | |
1351 | struct sk_buff *skb; | |
1352 | struct skb_eosp_msg_data *data; | |
1353 | ||
1354 | trace_api_eosp(local, pubsta); | |
1355 | ||
1356 | skb = alloc_skb(0, GFP_ATOMIC); | |
1357 | if (!skb) { | |
1358 | /* too bad ... but race is better than loss */ | |
1359 | clear_sta_flag(sta, WLAN_STA_SP); | |
1360 | return; | |
1361 | } | |
1362 | ||
1363 | data = (void *)skb->cb; | |
1364 | memcpy(data->sta, pubsta->addr, ETH_ALEN); | |
1365 | memcpy(data->iface, sta->sdata->vif.addr, ETH_ALEN); | |
1366 | skb->pkt_type = IEEE80211_EOSP_MSG; | |
1367 | skb_queue_tail(&local->skb_queue, skb); | |
1368 | tasklet_schedule(&local->tasklet); | |
1369 | } | |
1370 | EXPORT_SYMBOL(ieee80211_sta_eosp_irqsafe); | |
1371 | ||
042ec453 JB |
1372 | void ieee80211_sta_set_buffered(struct ieee80211_sta *pubsta, |
1373 | u8 tid, bool buffered) | |
dcf55fb5 FF |
1374 | { |
1375 | struct sta_info *sta = container_of(pubsta, struct sta_info, sta); | |
1376 | ||
5a306f58 | 1377 | if (WARN_ON(tid >= IEEE80211_NUM_TIDS)) |
042ec453 JB |
1378 | return; |
1379 | ||
948d887d JB |
1380 | if (buffered) |
1381 | set_bit(tid, &sta->driver_buffered_tids); | |
1382 | else | |
1383 | clear_bit(tid, &sta->driver_buffered_tids); | |
1384 | ||
c868cb35 | 1385 | sta_info_recalc_tim(sta); |
dcf55fb5 | 1386 | } |
042ec453 | 1387 | EXPORT_SYMBOL(ieee80211_sta_set_buffered); |
d9a7ddb0 | 1388 | |
83d5cc01 JB |
1389 | int sta_info_move_state(struct sta_info *sta, |
1390 | enum ieee80211_sta_state new_state) | |
d9a7ddb0 | 1391 | { |
8bf11d8d | 1392 | might_sleep(); |
d9a7ddb0 JB |
1393 | |
1394 | if (sta->sta_state == new_state) | |
1395 | return 0; | |
1396 | ||
f09603a2 JB |
1397 | /* check allowed transitions first */ |
1398 | ||
1399 | switch (new_state) { | |
1400 | case IEEE80211_STA_NONE: | |
1401 | if (sta->sta_state != IEEE80211_STA_AUTH) | |
1402 | return -EINVAL; | |
1403 | break; | |
1404 | case IEEE80211_STA_AUTH: | |
1405 | if (sta->sta_state != IEEE80211_STA_NONE && | |
1406 | sta->sta_state != IEEE80211_STA_ASSOC) | |
1407 | return -EINVAL; | |
1408 | break; | |
1409 | case IEEE80211_STA_ASSOC: | |
1410 | if (sta->sta_state != IEEE80211_STA_AUTH && | |
1411 | sta->sta_state != IEEE80211_STA_AUTHORIZED) | |
1412 | return -EINVAL; | |
1413 | break; | |
1414 | case IEEE80211_STA_AUTHORIZED: | |
1415 | if (sta->sta_state != IEEE80211_STA_ASSOC) | |
1416 | return -EINVAL; | |
1417 | break; | |
1418 | default: | |
1419 | WARN(1, "invalid state %d", new_state); | |
1420 | return -EINVAL; | |
1421 | } | |
1422 | ||
bdcbd8e0 JB |
1423 | sta_dbg(sta->sdata, "moving STA %pM to state %d\n", |
1424 | sta->sta.addr, new_state); | |
f09603a2 JB |
1425 | |
1426 | /* | |
1427 | * notify the driver before the actual changes so it can | |
1428 | * fail the transition | |
1429 | */ | |
1430 | if (test_sta_flag(sta, WLAN_STA_INSERTED)) { | |
1431 | int err = drv_sta_state(sta->local, sta->sdata, sta, | |
1432 | sta->sta_state, new_state); | |
1433 | if (err) | |
1434 | return err; | |
1435 | } | |
1436 | ||
1437 | /* reflect the change in all state variables */ | |
1438 | ||
d9a7ddb0 JB |
1439 | switch (new_state) { |
1440 | case IEEE80211_STA_NONE: | |
1441 | if (sta->sta_state == IEEE80211_STA_AUTH) | |
1442 | clear_bit(WLAN_STA_AUTH, &sta->_flags); | |
d9a7ddb0 JB |
1443 | break; |
1444 | case IEEE80211_STA_AUTH: | |
1445 | if (sta->sta_state == IEEE80211_STA_NONE) | |
1446 | set_bit(WLAN_STA_AUTH, &sta->_flags); | |
1447 | else if (sta->sta_state == IEEE80211_STA_ASSOC) | |
1448 | clear_bit(WLAN_STA_ASSOC, &sta->_flags); | |
d9a7ddb0 JB |
1449 | break; |
1450 | case IEEE80211_STA_ASSOC: | |
29623892 | 1451 | if (sta->sta_state == IEEE80211_STA_AUTH) { |
d9a7ddb0 | 1452 | set_bit(WLAN_STA_ASSOC, &sta->_flags); |
29623892 | 1453 | } else if (sta->sta_state == IEEE80211_STA_AUTHORIZED) { |
7e3ed02c FF |
1454 | if (sta->sdata->vif.type == NL80211_IFTYPE_AP || |
1455 | (sta->sdata->vif.type == NL80211_IFTYPE_AP_VLAN && | |
1456 | !sta->sdata->u.vlan.sta)) | |
1457 | atomic_dec(&sta->sdata->bss->num_mcast_sta); | |
d9a7ddb0 | 1458 | clear_bit(WLAN_STA_AUTHORIZED, &sta->_flags); |
f09603a2 | 1459 | } |
d9a7ddb0 JB |
1460 | break; |
1461 | case IEEE80211_STA_AUTHORIZED: | |
29623892 | 1462 | if (sta->sta_state == IEEE80211_STA_ASSOC) { |
7e3ed02c FF |
1463 | if (sta->sdata->vif.type == NL80211_IFTYPE_AP || |
1464 | (sta->sdata->vif.type == NL80211_IFTYPE_AP_VLAN && | |
1465 | !sta->sdata->u.vlan.sta)) | |
1466 | atomic_inc(&sta->sdata->bss->num_mcast_sta); | |
d9a7ddb0 | 1467 | set_bit(WLAN_STA_AUTHORIZED, &sta->_flags); |
f09603a2 | 1468 | } |
d9a7ddb0 JB |
1469 | break; |
1470 | default: | |
f09603a2 | 1471 | break; |
d9a7ddb0 JB |
1472 | } |
1473 | ||
d9a7ddb0 JB |
1474 | sta->sta_state = new_state; |
1475 | ||
1476 | return 0; | |
1477 | } |