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> | |
12 | #include <linux/netdevice.h> | |
13 | #include <linux/types.h> | |
14 | #include <linux/slab.h> | |
15 | #include <linux/skbuff.h> | |
16 | #include <linux/if_arp.h> | |
0d174406 | 17 | #include <linux/timer.h> |
d0709a65 | 18 | #include <linux/rtnetlink.h> |
f0706e82 JB |
19 | |
20 | #include <net/mac80211.h> | |
21 | #include "ieee80211_i.h" | |
24487981 | 22 | #include "driver-ops.h" |
2c8dccc7 | 23 | #include "rate.h" |
f0706e82 | 24 | #include "sta_info.h" |
e9f207f0 | 25 | #include "debugfs_sta.h" |
ee385855 | 26 | #include "mesh.h" |
ce662b44 | 27 | #include "wme.h" |
f0706e82 | 28 | |
d0709a65 JB |
29 | /** |
30 | * DOC: STA information lifetime rules | |
31 | * | |
32 | * STA info structures (&struct sta_info) are managed in a hash table | |
33 | * for faster lookup and a list for iteration. They are managed using | |
34 | * RCU, i.e. access to the list and hash table is protected by RCU. | |
35 | * | |
34e89507 JB |
36 | * Upon allocating a STA info structure with sta_info_alloc(), the caller |
37 | * owns that structure. It must then insert it into the hash table using | |
38 | * either sta_info_insert() or sta_info_insert_rcu(); only in the latter | |
39 | * case (which acquires an rcu read section but must not be called from | |
40 | * within one) will the pointer still be valid after the call. Note that | |
41 | * the caller may not do much with the STA info before inserting it, in | |
42 | * particular, it may not start any mesh peer link management or add | |
43 | * encryption keys. | |
93e5deb1 JB |
44 | * |
45 | * When the insertion fails (sta_info_insert()) returns non-zero), the | |
46 | * structure will have been freed by sta_info_insert()! | |
d0709a65 | 47 | * |
34e89507 | 48 | * Station entries are added by mac80211 when you establish a link with a |
7e189a12 LR |
49 | * peer. This means different things for the different type of interfaces |
50 | * we support. For a regular station this mean we add the AP sta when we | |
25985edc | 51 | * receive an association response from the AP. For IBSS this occurs when |
34e89507 | 52 | * get to know about a peer on the same IBSS. For WDS we add the sta for |
25985edc | 53 | * the peer immediately upon device open. When using AP mode we add stations |
34e89507 | 54 | * for each respective station upon request from userspace through nl80211. |
7e189a12 | 55 | * |
34e89507 JB |
56 | * In order to remove a STA info structure, various sta_info_destroy_*() |
57 | * calls are available. | |
d0709a65 | 58 | * |
34e89507 JB |
59 | * There is no concept of ownership on a STA entry, each structure is |
60 | * owned by the global hash table/list until it is removed. All users of | |
61 | * the structure need to be RCU protected so that the structure won't be | |
62 | * freed before they are done using it. | |
d0709a65 | 63 | */ |
f0706e82 | 64 | |
4d33960b | 65 | /* Caller must hold local->sta_mtx */ |
be8755e1 MW |
66 | static int sta_info_hash_del(struct ieee80211_local *local, |
67 | struct sta_info *sta) | |
f0706e82 JB |
68 | { |
69 | struct sta_info *s; | |
70 | ||
40b275b6 | 71 | s = rcu_dereference_protected(local->sta_hash[STA_HASH(sta->sta.addr)], |
4d33960b | 72 | lockdep_is_held(&local->sta_mtx)); |
f0706e82 | 73 | if (!s) |
be8755e1 MW |
74 | return -ENOENT; |
75 | if (s == sta) { | |
cf778b00 | 76 | rcu_assign_pointer(local->sta_hash[STA_HASH(sta->sta.addr)], |
d0709a65 | 77 | s->hnext); |
be8755e1 | 78 | return 0; |
f0706e82 JB |
79 | } |
80 | ||
40b275b6 JB |
81 | while (rcu_access_pointer(s->hnext) && |
82 | rcu_access_pointer(s->hnext) != sta) | |
83 | s = rcu_dereference_protected(s->hnext, | |
4d33960b | 84 | lockdep_is_held(&local->sta_mtx)); |
40b275b6 | 85 | if (rcu_access_pointer(s->hnext)) { |
cf778b00 | 86 | rcu_assign_pointer(s->hnext, sta->hnext); |
be8755e1 MW |
87 | return 0; |
88 | } | |
f0706e82 | 89 | |
be8755e1 | 90 | return -ENOENT; |
f0706e82 JB |
91 | } |
92 | ||
d0709a65 | 93 | /* protected by RCU */ |
abe60632 JB |
94 | struct sta_info *sta_info_get(struct ieee80211_sub_if_data *sdata, |
95 | const u8 *addr) | |
f0706e82 | 96 | { |
abe60632 | 97 | struct ieee80211_local *local = sdata->local; |
f0706e82 JB |
98 | struct sta_info *sta; |
99 | ||
2a33bee2 | 100 | sta = rcu_dereference_check(local->sta_hash[STA_HASH(addr)], |
2a33bee2 GE |
101 | lockdep_is_held(&local->sta_mtx)); |
102 | while (sta) { | |
103 | if (sta->sdata == sdata && !sta->dummy && | |
104 | memcmp(sta->sta.addr, addr, ETH_ALEN) == 0) | |
105 | break; | |
106 | sta = rcu_dereference_check(sta->hnext, | |
2a33bee2 GE |
107 | lockdep_is_held(&local->sta_mtx)); |
108 | } | |
109 | return sta; | |
110 | } | |
111 | ||
112 | /* get a station info entry even if it is a dummy station*/ | |
113 | struct sta_info *sta_info_get_rx(struct ieee80211_sub_if_data *sdata, | |
114 | const u8 *addr) | |
115 | { | |
116 | struct ieee80211_local *local = sdata->local; | |
117 | struct sta_info *sta; | |
118 | ||
0379185b | 119 | sta = rcu_dereference_check(local->sta_hash[STA_HASH(addr)], |
0379185b | 120 | lockdep_is_held(&local->sta_mtx)); |
f0706e82 | 121 | while (sta) { |
abe60632 JB |
122 | if (sta->sdata == sdata && |
123 | memcmp(sta->sta.addr, addr, ETH_ALEN) == 0) | |
f0706e82 | 124 | break; |
0379185b | 125 | sta = rcu_dereference_check(sta->hnext, |
0379185b | 126 | lockdep_is_held(&local->sta_mtx)); |
f0706e82 | 127 | } |
43ba7e95 JB |
128 | return sta; |
129 | } | |
130 | ||
0e5ded5a FF |
131 | /* |
132 | * Get sta info either from the specified interface | |
133 | * or from one of its vlans | |
134 | */ | |
135 | struct sta_info *sta_info_get_bss(struct ieee80211_sub_if_data *sdata, | |
136 | const u8 *addr) | |
137 | { | |
138 | struct ieee80211_local *local = sdata->local; | |
139 | struct sta_info *sta; | |
140 | ||
2a33bee2 | 141 | sta = rcu_dereference_check(local->sta_hash[STA_HASH(addr)], |
2a33bee2 GE |
142 | lockdep_is_held(&local->sta_mtx)); |
143 | while (sta) { | |
144 | if ((sta->sdata == sdata || | |
145 | (sta->sdata->bss && sta->sdata->bss == sdata->bss)) && | |
146 | !sta->dummy && | |
147 | memcmp(sta->sta.addr, addr, ETH_ALEN) == 0) | |
148 | break; | |
149 | sta = rcu_dereference_check(sta->hnext, | |
2a33bee2 GE |
150 | lockdep_is_held(&local->sta_mtx)); |
151 | } | |
152 | return sta; | |
153 | } | |
154 | ||
155 | /* | |
156 | * Get sta info either from the specified interface | |
157 | * or from one of its vlans (including dummy stations) | |
158 | */ | |
159 | struct sta_info *sta_info_get_bss_rx(struct ieee80211_sub_if_data *sdata, | |
160 | const u8 *addr) | |
161 | { | |
162 | struct ieee80211_local *local = sdata->local; | |
163 | struct sta_info *sta; | |
164 | ||
0379185b | 165 | sta = rcu_dereference_check(local->sta_hash[STA_HASH(addr)], |
0379185b | 166 | lockdep_is_held(&local->sta_mtx)); |
0e5ded5a FF |
167 | while (sta) { |
168 | if ((sta->sdata == sdata || | |
a2c1e3da | 169 | (sta->sdata->bss && sta->sdata->bss == sdata->bss)) && |
0e5ded5a FF |
170 | memcmp(sta->sta.addr, addr, ETH_ALEN) == 0) |
171 | break; | |
0379185b | 172 | sta = rcu_dereference_check(sta->hnext, |
0379185b | 173 | lockdep_is_held(&local->sta_mtx)); |
0e5ded5a FF |
174 | } |
175 | return sta; | |
176 | } | |
177 | ||
3b53fde8 JB |
178 | struct sta_info *sta_info_get_by_idx(struct ieee80211_sub_if_data *sdata, |
179 | int idx) | |
ee385855 | 180 | { |
3b53fde8 | 181 | struct ieee80211_local *local = sdata->local; |
ee385855 LCC |
182 | struct sta_info *sta; |
183 | int i = 0; | |
184 | ||
d0709a65 | 185 | list_for_each_entry_rcu(sta, &local->sta_list, list) { |
3b53fde8 | 186 | if (sdata != sta->sdata) |
2a8ca29a | 187 | continue; |
ee385855 LCC |
188 | if (i < idx) { |
189 | ++i; | |
190 | continue; | |
ee385855 | 191 | } |
2a8ca29a | 192 | return sta; |
ee385855 | 193 | } |
ee385855 LCC |
194 | |
195 | return NULL; | |
196 | } | |
f0706e82 | 197 | |
93e5deb1 | 198 | /** |
d9a7ddb0 | 199 | * sta_info_free - free STA |
93e5deb1 | 200 | * |
6ef307bc | 201 | * @local: pointer to the global information |
93e5deb1 JB |
202 | * @sta: STA info to free |
203 | * | |
204 | * This function must undo everything done by sta_info_alloc() | |
d9a7ddb0 JB |
205 | * that may happen before sta_info_insert(). It may only be |
206 | * called when sta_info_insert() has not been attempted (and | |
207 | * if that fails, the station is freed anyway.) | |
93e5deb1 | 208 | */ |
d9a7ddb0 | 209 | void sta_info_free(struct ieee80211_local *local, struct sta_info *sta) |
93e5deb1 | 210 | { |
889cbb91 | 211 | if (sta->rate_ctrl) |
af65cd96 | 212 | rate_control_free_sta(sta); |
93e5deb1 JB |
213 | |
214 | #ifdef CONFIG_MAC80211_VERBOSE_DEBUG | |
0fb9a9ec | 215 | wiphy_debug(local->hw.wiphy, "Destroyed STA %pM\n", sta->sta.addr); |
93e5deb1 JB |
216 | #endif /* CONFIG_MAC80211_VERBOSE_DEBUG */ |
217 | ||
218 | kfree(sta); | |
219 | } | |
220 | ||
4d33960b | 221 | /* Caller must hold local->sta_mtx */ |
d0709a65 JB |
222 | static void sta_info_hash_add(struct ieee80211_local *local, |
223 | struct sta_info *sta) | |
f0706e82 | 224 | { |
4d33960b | 225 | lockdep_assert_held(&local->sta_mtx); |
17741cdc | 226 | sta->hnext = local->sta_hash[STA_HASH(sta->sta.addr)]; |
cf778b00 | 227 | rcu_assign_pointer(local->sta_hash[STA_HASH(sta->sta.addr)], sta); |
f0706e82 | 228 | } |
f0706e82 | 229 | |
af818581 JB |
230 | static void sta_unblock(struct work_struct *wk) |
231 | { | |
232 | struct sta_info *sta; | |
233 | ||
234 | sta = container_of(wk, struct sta_info, drv_unblock_wk); | |
235 | ||
236 | if (sta->dead) | |
237 | return; | |
238 | ||
54420473 HS |
239 | if (!test_sta_flag(sta, WLAN_STA_PS_STA)) { |
240 | local_bh_disable(); | |
af818581 | 241 | ieee80211_sta_ps_deliver_wakeup(sta); |
54420473 HS |
242 | local_bh_enable(); |
243 | } else if (test_and_clear_sta_flag(sta, WLAN_STA_PSPOLL)) { | |
c2c98fde | 244 | clear_sta_flag(sta, WLAN_STA_PS_DRIVER); |
ce662b44 JB |
245 | |
246 | local_bh_disable(); | |
af818581 | 247 | ieee80211_sta_ps_deliver_poll_response(sta); |
ce662b44 | 248 | local_bh_enable(); |
c2c98fde JB |
249 | } else if (test_and_clear_sta_flag(sta, WLAN_STA_UAPSD)) { |
250 | clear_sta_flag(sta, WLAN_STA_PS_DRIVER); | |
ce662b44 JB |
251 | |
252 | local_bh_disable(); | |
47086fc5 | 253 | ieee80211_sta_ps_deliver_uapsd(sta); |
ce662b44 | 254 | local_bh_enable(); |
50a9432d | 255 | } else |
c2c98fde | 256 | clear_sta_flag(sta, WLAN_STA_PS_DRIVER); |
af818581 JB |
257 | } |
258 | ||
af65cd96 JB |
259 | static int sta_prepare_rate_control(struct ieee80211_local *local, |
260 | struct sta_info *sta, gfp_t gfp) | |
261 | { | |
262 | if (local->hw.flags & IEEE80211_HW_HAS_RATE_CONTROL) | |
263 | return 0; | |
264 | ||
889cbb91 | 265 | sta->rate_ctrl = local->rate_ctrl; |
af65cd96 JB |
266 | sta->rate_ctrl_priv = rate_control_alloc_sta(sta->rate_ctrl, |
267 | &sta->sta, gfp); | |
889cbb91 | 268 | if (!sta->rate_ctrl_priv) |
af65cd96 | 269 | return -ENOMEM; |
af65cd96 JB |
270 | |
271 | return 0; | |
272 | } | |
273 | ||
73651ee6 | 274 | struct sta_info *sta_info_alloc(struct ieee80211_sub_if_data *sdata, |
56544160 | 275 | const u8 *addr, gfp_t gfp) |
f0706e82 | 276 | { |
d0709a65 | 277 | struct ieee80211_local *local = sdata->local; |
f0706e82 | 278 | struct sta_info *sta; |
ebe27c91 | 279 | struct timespec uptime; |
16c5f15c | 280 | int i; |
f0706e82 | 281 | |
17741cdc | 282 | sta = kzalloc(sizeof(*sta) + local->hw.sta_data_size, gfp); |
f0706e82 | 283 | if (!sta) |
73651ee6 | 284 | return NULL; |
f0706e82 | 285 | |
07346f81 | 286 | spin_lock_init(&sta->lock); |
af818581 | 287 | INIT_WORK(&sta->drv_unblock_wk, sta_unblock); |
67c282c0 | 288 | INIT_WORK(&sta->ampdu_mlme.work, ieee80211_ba_session_work); |
a93e3644 | 289 | mutex_init(&sta->ampdu_mlme.mtx); |
07346f81 | 290 | |
17741cdc | 291 | memcpy(sta->sta.addr, addr, ETH_ALEN); |
d0709a65 JB |
292 | sta->local = local; |
293 | sta->sdata = sdata; | |
8bc8aecd | 294 | sta->last_rx = jiffies; |
f0706e82 | 295 | |
71ec375c JB |
296 | sta->sta_state = IEEE80211_STA_NONE; |
297 | ||
ebe27c91 MSS |
298 | do_posix_clock_monotonic_gettime(&uptime); |
299 | sta->last_connected = uptime.tv_sec; | |
541a45a1 BR |
300 | ewma_init(&sta->avg_signal, 1024, 8); |
301 | ||
af65cd96 | 302 | if (sta_prepare_rate_control(local, sta, gfp)) { |
f0706e82 | 303 | kfree(sta); |
73651ee6 | 304 | return NULL; |
f0706e82 JB |
305 | } |
306 | ||
16c5f15c | 307 | for (i = 0; i < STA_TID_NUM; i++) { |
a622ab72 JB |
308 | /* |
309 | * timer_to_tid must be initialized with identity mapping | |
310 | * to enable session_timer's data differentiation. See | |
311 | * sta_rx_agg_session_timer_expired for usage. | |
312 | */ | |
16c5f15c | 313 | sta->timer_to_tid[i] = i; |
16c5f15c | 314 | } |
948d887d JB |
315 | for (i = 0; i < IEEE80211_NUM_ACS; i++) { |
316 | skb_queue_head_init(&sta->ps_tx_buf[i]); | |
317 | skb_queue_head_init(&sta->tx_filtered[i]); | |
318 | } | |
73651ee6 | 319 | |
cccaec98 | 320 | for (i = 0; i < NUM_RX_DATA_QUEUES; i++) |
4be929be | 321 | sta->last_seq_ctrl[i] = cpu_to_le16(USHRT_MAX); |
cccaec98 | 322 | |
73651ee6 | 323 | #ifdef CONFIG_MAC80211_VERBOSE_DEBUG |
0fb9a9ec | 324 | wiphy_debug(local->hw.wiphy, "Allocated STA %pM\n", sta->sta.addr); |
73651ee6 JB |
325 | #endif /* CONFIG_MAC80211_VERBOSE_DEBUG */ |
326 | ||
03e4497e | 327 | #ifdef CONFIG_MAC80211_MESH |
57cf8043 | 328 | sta->plink_state = NL80211_PLINK_LISTEN; |
03e4497e JB |
329 | init_timer(&sta->plink_timer); |
330 | #endif | |
331 | ||
73651ee6 JB |
332 | return sta; |
333 | } | |
334 | ||
8c71df7a | 335 | static int sta_info_insert_check(struct sta_info *sta) |
34e89507 | 336 | { |
34e89507 | 337 | struct ieee80211_sub_if_data *sdata = sta->sdata; |
34e89507 | 338 | |
03e4497e JB |
339 | /* |
340 | * Can't be a WARN_ON because it can be triggered through a race: | |
341 | * something inserts a STA (on one CPU) without holding the RTNL | |
342 | * and another CPU turns off the net device. | |
343 | */ | |
8c71df7a GE |
344 | if (unlikely(!ieee80211_sdata_running(sdata))) |
345 | return -ENETDOWN; | |
03e4497e | 346 | |
47846c9b | 347 | if (WARN_ON(compare_ether_addr(sta->sta.addr, sdata->vif.addr) == 0 || |
8c71df7a GE |
348 | is_multicast_ether_addr(sta->sta.addr))) |
349 | return -EINVAL; | |
350 | ||
351 | return 0; | |
352 | } | |
353 | ||
f09603a2 JB |
354 | static int sta_info_insert_drv_state(struct ieee80211_local *local, |
355 | struct ieee80211_sub_if_data *sdata, | |
356 | struct sta_info *sta) | |
357 | { | |
358 | enum ieee80211_sta_state state; | |
359 | int err = 0; | |
360 | ||
361 | for (state = IEEE80211_STA_NOTEXIST; state < sta->sta_state; state++) { | |
362 | err = drv_sta_state(local, sdata, sta, state, state + 1); | |
363 | if (err) | |
364 | break; | |
365 | } | |
366 | ||
367 | if (!err) { | |
a4ec45a4 JB |
368 | /* |
369 | * Drivers using legacy sta_add/sta_remove callbacks only | |
370 | * get uploaded set to true after sta_add is called. | |
371 | */ | |
372 | if (!local->ops->sta_add) | |
373 | sta->uploaded = true; | |
f09603a2 JB |
374 | return 0; |
375 | } | |
376 | ||
377 | if (sdata->vif.type == NL80211_IFTYPE_ADHOC) { | |
378 | printk(KERN_DEBUG | |
379 | "%s: failed to move IBSS STA %pM to state %d (%d) - keeping it anyway.\n", | |
380 | sdata->name, sta->sta.addr, state + 1, err); | |
381 | err = 0; | |
382 | } | |
383 | ||
384 | /* unwind on error */ | |
385 | for (; state > IEEE80211_STA_NOTEXIST; state--) | |
386 | WARN_ON(drv_sta_state(local, sdata, sta, state, state - 1)); | |
387 | ||
388 | return err; | |
389 | } | |
390 | ||
8c71df7a GE |
391 | /* |
392 | * should be called with sta_mtx locked | |
393 | * this function replaces the mutex lock | |
394 | * with a RCU lock | |
395 | */ | |
4d33960b | 396 | static int sta_info_insert_finish(struct sta_info *sta) __acquires(RCU) |
8c71df7a GE |
397 | { |
398 | struct ieee80211_local *local = sta->local; | |
399 | struct ieee80211_sub_if_data *sdata = sta->sdata; | |
2a33bee2 GE |
400 | struct sta_info *exist_sta; |
401 | bool dummy_reinsert = false; | |
8c71df7a GE |
402 | int err = 0; |
403 | ||
404 | lockdep_assert_held(&local->sta_mtx); | |
34e89507 | 405 | |
2a33bee2 GE |
406 | /* |
407 | * check if STA exists already. | |
4d33960b | 408 | * only accept a scenario of a second call to sta_info_insert_finish |
2a33bee2 GE |
409 | * with a dummy station entry that was inserted earlier |
410 | * in that case - assume that the dummy station flag should | |
411 | * be removed. | |
412 | */ | |
413 | exist_sta = sta_info_get_bss_rx(sdata, sta->sta.addr); | |
414 | if (exist_sta) { | |
415 | if (exist_sta == sta && sta->dummy) { | |
416 | dummy_reinsert = true; | |
417 | } else { | |
4d33960b JB |
418 | err = -EEXIST; |
419 | goto out_err; | |
2a33bee2 | 420 | } |
43ba7e95 | 421 | } |
32bfd35d | 422 | |
4d33960b JB |
423 | if (!sta->dummy || dummy_reinsert) { |
424 | /* notify driver */ | |
a4ec45a4 JB |
425 | err = sta_info_insert_drv_state(local, sdata, sta); |
426 | if (err) | |
427 | goto out_err; | |
4d33960b | 428 | } |
32bfd35d | 429 | |
4d33960b JB |
430 | if (!dummy_reinsert) { |
431 | local->num_sta++; | |
432 | local->sta_generation++; | |
433 | smp_mb(); | |
434 | ||
435 | /* make the station visible */ | |
436 | sta_info_hash_add(local, sta); | |
437 | ||
438 | list_add(&sta->list, &local->sta_list); | |
83d5cc01 JB |
439 | |
440 | set_sta_flag(sta, WLAN_STA_INSERTED); | |
4d33960b JB |
441 | } else { |
442 | sta->dummy = false; | |
443 | } | |
444 | ||
445 | if (!sta->dummy) { | |
446 | struct station_info sinfo; | |
447 | ||
448 | ieee80211_sta_debugfs_add(sta); | |
449 | rate_control_add_sta_debugfs(sta); | |
450 | ||
451 | memset(&sinfo, 0, sizeof(sinfo)); | |
452 | sinfo.filled = 0; | |
453 | sinfo.generation = local->sta_generation; | |
454 | cfg80211_new_sta(sdata->dev, sta->sta.addr, &sinfo, GFP_KERNEL); | |
32bfd35d | 455 | } |
d0709a65 | 456 | |
f0706e82 | 457 | #ifdef CONFIG_MAC80211_VERBOSE_DEBUG |
2a33bee2 GE |
458 | wiphy_debug(local->hw.wiphy, "Inserted %sSTA %pM\n", |
459 | sta->dummy ? "dummy " : "", sta->sta.addr); | |
f0706e82 JB |
460 | #endif /* CONFIG_MAC80211_VERBOSE_DEBUG */ |
461 | ||
34e89507 JB |
462 | /* move reference to rcu-protected */ |
463 | rcu_read_lock(); | |
464 | mutex_unlock(&local->sta_mtx); | |
e9f207f0 | 465 | |
73651ee6 JB |
466 | if (ieee80211_vif_is_mesh(&sdata->vif)) |
467 | mesh_accept_plinks_update(sdata); | |
468 | ||
8c71df7a | 469 | return 0; |
4d33960b JB |
470 | out_err: |
471 | mutex_unlock(&local->sta_mtx); | |
472 | rcu_read_lock(); | |
473 | return err; | |
8c71df7a GE |
474 | } |
475 | ||
476 | int sta_info_insert_rcu(struct sta_info *sta) __acquires(RCU) | |
477 | { | |
478 | struct ieee80211_local *local = sta->local; | |
8c71df7a GE |
479 | int err = 0; |
480 | ||
4d33960b JB |
481 | might_sleep(); |
482 | ||
8c71df7a GE |
483 | err = sta_info_insert_check(sta); |
484 | if (err) { | |
485 | rcu_read_lock(); | |
486 | goto out_free; | |
487 | } | |
488 | ||
8c71df7a GE |
489 | mutex_lock(&local->sta_mtx); |
490 | ||
4d33960b | 491 | err = sta_info_insert_finish(sta); |
8c71df7a GE |
492 | if (err) |
493 | goto out_free; | |
494 | ||
73651ee6 | 495 | return 0; |
93e5deb1 JB |
496 | out_free: |
497 | BUG_ON(!err); | |
d9a7ddb0 | 498 | sta_info_free(local, sta); |
93e5deb1 | 499 | return err; |
f0706e82 JB |
500 | } |
501 | ||
34e89507 JB |
502 | int sta_info_insert(struct sta_info *sta) |
503 | { | |
504 | int err = sta_info_insert_rcu(sta); | |
505 | ||
506 | rcu_read_unlock(); | |
507 | ||
508 | return err; | |
509 | } | |
510 | ||
2a33bee2 GE |
511 | /* Caller must hold sta->local->sta_mtx */ |
512 | int sta_info_reinsert(struct sta_info *sta) | |
513 | { | |
514 | struct ieee80211_local *local = sta->local; | |
515 | int err = 0; | |
516 | ||
517 | err = sta_info_insert_check(sta); | |
518 | if (err) { | |
519 | mutex_unlock(&local->sta_mtx); | |
520 | return err; | |
521 | } | |
522 | ||
523 | might_sleep(); | |
524 | ||
4d33960b | 525 | err = sta_info_insert_finish(sta); |
2a33bee2 GE |
526 | rcu_read_unlock(); |
527 | return err; | |
528 | } | |
529 | ||
004c872e JB |
530 | static inline void __bss_tim_set(struct ieee80211_if_ap *bss, u16 aid) |
531 | { | |
532 | /* | |
533 | * This format has been mandated by the IEEE specifications, | |
534 | * so this line may not be changed to use the __set_bit() format. | |
535 | */ | |
536 | bss->tim[aid / 8] |= (1 << (aid % 8)); | |
537 | } | |
538 | ||
539 | static inline void __bss_tim_clear(struct ieee80211_if_ap *bss, u16 aid) | |
540 | { | |
541 | /* | |
542 | * This format has been mandated by the IEEE specifications, | |
543 | * so this line may not be changed to use the __clear_bit() format. | |
544 | */ | |
545 | bss->tim[aid / 8] &= ~(1 << (aid % 8)); | |
546 | } | |
547 | ||
948d887d | 548 | static unsigned long ieee80211_tids_for_ac(int ac) |
004c872e | 549 | { |
948d887d JB |
550 | /* If we ever support TIDs > 7, this obviously needs to be adjusted */ |
551 | switch (ac) { | |
552 | case IEEE80211_AC_VO: | |
553 | return BIT(6) | BIT(7); | |
554 | case IEEE80211_AC_VI: | |
555 | return BIT(4) | BIT(5); | |
556 | case IEEE80211_AC_BE: | |
557 | return BIT(0) | BIT(3); | |
558 | case IEEE80211_AC_BK: | |
559 | return BIT(1) | BIT(2); | |
560 | default: | |
561 | WARN_ON(1); | |
562 | return 0; | |
d0709a65 | 563 | } |
004c872e JB |
564 | } |
565 | ||
c868cb35 | 566 | void sta_info_recalc_tim(struct sta_info *sta) |
004c872e | 567 | { |
c868cb35 JB |
568 | struct ieee80211_local *local = sta->local; |
569 | struct ieee80211_if_ap *bss = sta->sdata->bss; | |
d0709a65 | 570 | unsigned long flags; |
948d887d JB |
571 | bool indicate_tim = false; |
572 | u8 ignore_for_tim = sta->sta.uapsd_queues; | |
573 | int ac; | |
004c872e | 574 | |
c868cb35 JB |
575 | if (WARN_ON_ONCE(!sta->sdata->bss)) |
576 | return; | |
3e122be0 | 577 | |
c868cb35 JB |
578 | /* No need to do anything if the driver does all */ |
579 | if (local->hw.flags & IEEE80211_HW_AP_LINK_PS) | |
580 | return; | |
004c872e | 581 | |
c868cb35 JB |
582 | if (sta->dead) |
583 | goto done; | |
3e122be0 | 584 | |
948d887d JB |
585 | /* |
586 | * If all ACs are delivery-enabled then we should build | |
587 | * the TIM bit for all ACs anyway; if only some are then | |
588 | * we ignore those and build the TIM bit using only the | |
589 | * non-enabled ones. | |
590 | */ | |
591 | if (ignore_for_tim == BIT(IEEE80211_NUM_ACS) - 1) | |
592 | ignore_for_tim = 0; | |
593 | ||
594 | for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) { | |
595 | unsigned long tids; | |
3e122be0 | 596 | |
948d887d JB |
597 | if (ignore_for_tim & BIT(ac)) |
598 | continue; | |
599 | ||
600 | indicate_tim |= !skb_queue_empty(&sta->tx_filtered[ac]) || | |
601 | !skb_queue_empty(&sta->ps_tx_buf[ac]); | |
602 | if (indicate_tim) | |
603 | break; | |
3e122be0 | 604 | |
948d887d JB |
605 | tids = ieee80211_tids_for_ac(ac); |
606 | ||
607 | indicate_tim |= | |
608 | sta->driver_buffered_tids & tids; | |
d0709a65 | 609 | } |
004c872e | 610 | |
c868cb35 | 611 | done: |
4d33960b | 612 | spin_lock_irqsave(&local->tim_lock, flags); |
004c872e | 613 | |
948d887d | 614 | if (indicate_tim) |
c868cb35 JB |
615 | __bss_tim_set(bss, sta->sta.aid); |
616 | else | |
617 | __bss_tim_clear(bss, sta->sta.aid); | |
004c872e | 618 | |
c868cb35 JB |
619 | if (local->ops->set_tim) { |
620 | local->tim_in_locked_section = true; | |
948d887d | 621 | drv_set_tim(local, &sta->sta, indicate_tim); |
c868cb35 JB |
622 | local->tim_in_locked_section = false; |
623 | } | |
3e122be0 | 624 | |
4d33960b | 625 | spin_unlock_irqrestore(&local->tim_lock, flags); |
004c872e JB |
626 | } |
627 | ||
cd0b8d89 | 628 | static bool sta_info_buffer_expired(struct sta_info *sta, struct sk_buff *skb) |
f0706e82 | 629 | { |
e039fa4a | 630 | struct ieee80211_tx_info *info; |
f0706e82 JB |
631 | int timeout; |
632 | ||
633 | if (!skb) | |
cd0b8d89 | 634 | return false; |
f0706e82 | 635 | |
e039fa4a | 636 | info = IEEE80211_SKB_CB(skb); |
f0706e82 JB |
637 | |
638 | /* Timeout: (2 * listen_interval * beacon_int * 1024 / 1000000) sec */ | |
57c4d7b4 JB |
639 | timeout = (sta->listen_interval * |
640 | sta->sdata->vif.bss_conf.beacon_int * | |
641 | 32 / 15625) * HZ; | |
f0706e82 JB |
642 | if (timeout < STA_TX_BUFFER_EXPIRE) |
643 | timeout = STA_TX_BUFFER_EXPIRE; | |
e039fa4a | 644 | return time_after(jiffies, info->control.jiffies + timeout); |
f0706e82 JB |
645 | } |
646 | ||
647 | ||
948d887d JB |
648 | static bool sta_info_cleanup_expire_buffered_ac(struct ieee80211_local *local, |
649 | struct sta_info *sta, int ac) | |
f0706e82 JB |
650 | { |
651 | unsigned long flags; | |
652 | struct sk_buff *skb; | |
653 | ||
60750397 JB |
654 | /* |
655 | * First check for frames that should expire on the filtered | |
656 | * queue. Frames here were rejected by the driver and are on | |
657 | * a separate queue to avoid reordering with normal PS-buffered | |
658 | * frames. They also aren't accounted for right now in the | |
659 | * total_ps_buffered counter. | |
660 | */ | |
661 | for (;;) { | |
948d887d JB |
662 | spin_lock_irqsave(&sta->tx_filtered[ac].lock, flags); |
663 | skb = skb_peek(&sta->tx_filtered[ac]); | |
60750397 | 664 | if (sta_info_buffer_expired(sta, skb)) |
948d887d | 665 | skb = __skb_dequeue(&sta->tx_filtered[ac]); |
60750397 JB |
666 | else |
667 | skb = NULL; | |
948d887d | 668 | spin_unlock_irqrestore(&sta->tx_filtered[ac].lock, flags); |
60750397 JB |
669 | |
670 | /* | |
671 | * Frames are queued in order, so if this one | |
672 | * hasn't expired yet we can stop testing. If | |
673 | * we actually reached the end of the queue we | |
674 | * also need to stop, of course. | |
675 | */ | |
676 | if (!skb) | |
677 | break; | |
678 | dev_kfree_skb(skb); | |
679 | } | |
680 | ||
681 | /* | |
682 | * Now also check the normal PS-buffered queue, this will | |
683 | * only find something if the filtered queue was emptied | |
684 | * since the filtered frames are all before the normal PS | |
685 | * buffered frames. | |
686 | */ | |
f0706e82 | 687 | for (;;) { |
948d887d JB |
688 | spin_lock_irqsave(&sta->ps_tx_buf[ac].lock, flags); |
689 | skb = skb_peek(&sta->ps_tx_buf[ac]); | |
57c4d7b4 | 690 | if (sta_info_buffer_expired(sta, skb)) |
948d887d | 691 | skb = __skb_dequeue(&sta->ps_tx_buf[ac]); |
836341a7 | 692 | else |
f0706e82 | 693 | skb = NULL; |
948d887d | 694 | spin_unlock_irqrestore(&sta->ps_tx_buf[ac].lock, flags); |
f0706e82 | 695 | |
60750397 JB |
696 | /* |
697 | * frames are queued in order, so if this one | |
698 | * hasn't expired yet (or we reached the end of | |
699 | * the queue) we can stop testing | |
700 | */ | |
836341a7 | 701 | if (!skb) |
f0706e82 | 702 | break; |
836341a7 | 703 | |
836341a7 | 704 | local->total_ps_buffered--; |
f4ea83dd | 705 | #ifdef CONFIG_MAC80211_VERBOSE_PS_DEBUG |
0c68ae26 JB |
706 | printk(KERN_DEBUG "Buffered frame expired (STA %pM)\n", |
707 | sta->sta.addr); | |
f4ea83dd | 708 | #endif |
836341a7 | 709 | dev_kfree_skb(skb); |
f0706e82 | 710 | } |
3393a608 | 711 | |
60750397 JB |
712 | /* |
713 | * Finally, recalculate the TIM bit for this station -- it might | |
714 | * now be clear because the station was too slow to retrieve its | |
715 | * frames. | |
716 | */ | |
717 | sta_info_recalc_tim(sta); | |
718 | ||
719 | /* | |
720 | * Return whether there are any frames still buffered, this is | |
721 | * used to check whether the cleanup timer still needs to run, | |
722 | * if there are no frames we don't need to rearm the timer. | |
723 | */ | |
948d887d JB |
724 | return !(skb_queue_empty(&sta->ps_tx_buf[ac]) && |
725 | skb_queue_empty(&sta->tx_filtered[ac])); | |
726 | } | |
727 | ||
728 | static bool sta_info_cleanup_expire_buffered(struct ieee80211_local *local, | |
729 | struct sta_info *sta) | |
730 | { | |
731 | bool have_buffered = false; | |
732 | int ac; | |
733 | ||
734 | /* This is only necessary for stations on BSS interfaces */ | |
735 | if (!sta->sdata->bss) | |
736 | return false; | |
737 | ||
738 | for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) | |
739 | have_buffered |= | |
740 | sta_info_cleanup_expire_buffered_ac(local, sta, ac); | |
741 | ||
742 | return have_buffered; | |
f0706e82 JB |
743 | } |
744 | ||
83d5cc01 | 745 | int __must_check __sta_info_destroy(struct sta_info *sta) |
f0706e82 | 746 | { |
34e89507 JB |
747 | struct ieee80211_local *local; |
748 | struct ieee80211_sub_if_data *sdata; | |
948d887d | 749 | int ret, i, ac; |
42624d49 | 750 | struct tid_ampdu_tx *tid_tx; |
f0706e82 | 751 | |
34e89507 | 752 | might_sleep(); |
f0706e82 | 753 | |
34e89507 JB |
754 | if (!sta) |
755 | return -ENOENT; | |
5bb644a0 | 756 | |
34e89507 JB |
757 | local = sta->local; |
758 | sdata = sta->sdata; | |
f0706e82 | 759 | |
83d5cc01 JB |
760 | lockdep_assert_held(&local->sta_mtx); |
761 | ||
098a6070 JB |
762 | /* |
763 | * Before removing the station from the driver and | |
764 | * rate control, it might still start new aggregation | |
765 | * sessions -- block that to make sure the tear-down | |
766 | * will be sufficient. | |
767 | */ | |
c2c98fde | 768 | set_sta_flag(sta, WLAN_STA_BLOCK_BA); |
53f73c09 | 769 | ieee80211_sta_tear_down_BA_sessions(sta, true); |
098a6070 | 770 | |
34e89507 | 771 | ret = sta_info_hash_del(local, sta); |
34e89507 JB |
772 | if (ret) |
773 | return ret; | |
774 | ||
4d33960b JB |
775 | list_del(&sta->list); |
776 | ||
8cb23153 | 777 | mutex_lock(&local->key_mtx); |
e31b8213 | 778 | for (i = 0; i < NUM_DEFAULT_KEYS; i++) |
40b275b6 | 779 | __ieee80211_key_free(key_mtx_dereference(local, sta->gtk[i])); |
e31b8213 | 780 | if (sta->ptk) |
40b275b6 | 781 | __ieee80211_key_free(key_mtx_dereference(local, sta->ptk)); |
8cb23153 | 782 | mutex_unlock(&local->key_mtx); |
34e89507 JB |
783 | |
784 | sta->dead = true; | |
785 | ||
34e89507 JB |
786 | local->num_sta--; |
787 | local->sta_generation++; | |
788 | ||
789 | if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) | |
a9b3cd7f | 790 | RCU_INIT_POINTER(sdata->u.vlan.sta, NULL); |
34e89507 | 791 | |
83d5cc01 | 792 | while (sta->sta_state > IEEE80211_STA_NONE) { |
f09603a2 JB |
793 | ret = sta_info_move_state(sta, sta->sta_state - 1); |
794 | if (ret) { | |
83d5cc01 JB |
795 | WARN_ON_ONCE(1); |
796 | break; | |
797 | } | |
798 | } | |
d9a7ddb0 | 799 | |
f09603a2 | 800 | if (sta->uploaded) { |
f09603a2 JB |
801 | ret = drv_sta_state(local, sdata, sta, IEEE80211_STA_NONE, |
802 | IEEE80211_STA_NOTEXIST); | |
803 | WARN_ON_ONCE(ret != 0); | |
804 | } | |
34e89507 | 805 | |
e64b3795 JB |
806 | /* |
807 | * At this point, after we wait for an RCU grace period, | |
808 | * neither mac80211 nor the driver can reference this | |
809 | * sta struct any more except by still existing timers | |
810 | * associated with this station that we clean up below. | |
811 | */ | |
812 | synchronize_rcu(); | |
813 | ||
4f3eb0ba HS |
814 | if (test_sta_flag(sta, WLAN_STA_PS_STA)) { |
815 | BUG_ON(!sdata->bss); | |
816 | ||
817 | clear_sta_flag(sta, WLAN_STA_PS_STA); | |
818 | ||
819 | atomic_dec(&sdata->bss->num_sta_ps); | |
820 | sta_info_recalc_tim(sta); | |
821 | } | |
822 | ||
948d887d JB |
823 | for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) { |
824 | local->total_ps_buffered -= skb_queue_len(&sta->ps_tx_buf[ac]); | |
825 | __skb_queue_purge(&sta->ps_tx_buf[ac]); | |
826 | __skb_queue_purge(&sta->tx_filtered[ac]); | |
827 | } | |
c868cb35 | 828 | |
34e89507 | 829 | #ifdef CONFIG_MAC80211_MESH |
e64b3795 | 830 | if (ieee80211_vif_is_mesh(&sdata->vif)) |
34e89507 | 831 | mesh_accept_plinks_update(sdata); |
34e89507 JB |
832 | #endif |
833 | ||
834 | #ifdef CONFIG_MAC80211_VERBOSE_DEBUG | |
0fb9a9ec | 835 | wiphy_debug(local->hw.wiphy, "Removed STA %pM\n", sta->sta.addr); |
34e89507 JB |
836 | #endif /* CONFIG_MAC80211_VERBOSE_DEBUG */ |
837 | cancel_work_sync(&sta->drv_unblock_wk); | |
838 | ||
ec15e68b JM |
839 | cfg80211_del_sta(sdata->dev, sta->sta.addr, GFP_KERNEL); |
840 | ||
34e89507 JB |
841 | rate_control_remove_sta_debugfs(sta); |
842 | ieee80211_sta_debugfs_remove(sta); | |
843 | ||
844 | #ifdef CONFIG_MAC80211_MESH | |
845 | if (ieee80211_vif_is_mesh(&sta->sdata->vif)) { | |
846 | mesh_plink_deactivate(sta); | |
847 | del_timer_sync(&sta->plink_timer); | |
848 | } | |
849 | #endif | |
850 | ||
151a02f6 JB |
851 | /* |
852 | * Destroy aggregation state here. It would be nice to wait for the | |
853 | * driver to finish aggregation stop and then clean up, but for now | |
854 | * drivers have to handle aggregation stop being requested, followed | |
855 | * directly by station destruction. | |
42624d49 YAP |
856 | */ |
857 | for (i = 0; i < STA_TID_NUM; i++) { | |
151a02f6 | 858 | tid_tx = rcu_dereference_raw(sta->ampdu_mlme.tid_tx[i]); |
27bf8882 | 859 | if (!tid_tx) |
42624d49 | 860 | continue; |
151a02f6 JB |
861 | __skb_queue_purge(&tid_tx->pending); |
862 | kfree(tid_tx); | |
42624d49 YAP |
863 | } |
864 | ||
d9a7ddb0 | 865 | sta_info_free(local, sta); |
34e89507 JB |
866 | |
867 | return 0; | |
4d6141c3 JS |
868 | } |
869 | ||
34e89507 | 870 | int sta_info_destroy_addr(struct ieee80211_sub_if_data *sdata, const u8 *addr) |
4d6141c3 | 871 | { |
34e89507 JB |
872 | struct sta_info *sta; |
873 | int ret; | |
4d6141c3 | 874 | |
34e89507 | 875 | mutex_lock(&sdata->local->sta_mtx); |
2a33bee2 | 876 | sta = sta_info_get_rx(sdata, addr); |
34e89507 JB |
877 | ret = __sta_info_destroy(sta); |
878 | mutex_unlock(&sdata->local->sta_mtx); | |
4d6141c3 JS |
879 | |
880 | return ret; | |
881 | } | |
882 | ||
34e89507 JB |
883 | int sta_info_destroy_addr_bss(struct ieee80211_sub_if_data *sdata, |
884 | const u8 *addr) | |
e9f207f0 | 885 | { |
34e89507 JB |
886 | struct sta_info *sta; |
887 | int ret; | |
e9f207f0 | 888 | |
34e89507 | 889 | mutex_lock(&sdata->local->sta_mtx); |
2a33bee2 | 890 | sta = sta_info_get_bss_rx(sdata, addr); |
34e89507 JB |
891 | ret = __sta_info_destroy(sta); |
892 | mutex_unlock(&sdata->local->sta_mtx); | |
d0709a65 | 893 | |
34e89507 JB |
894 | return ret; |
895 | } | |
e9f207f0 | 896 | |
34e89507 JB |
897 | static void sta_info_cleanup(unsigned long data) |
898 | { | |
899 | struct ieee80211_local *local = (struct ieee80211_local *) data; | |
900 | struct sta_info *sta; | |
3393a608 | 901 | bool timer_needed = false; |
34e89507 JB |
902 | |
903 | rcu_read_lock(); | |
904 | list_for_each_entry_rcu(sta, &local->sta_list, list) | |
3393a608 JO |
905 | if (sta_info_cleanup_expire_buffered(local, sta)) |
906 | timer_needed = true; | |
34e89507 | 907 | rcu_read_unlock(); |
e9f207f0 | 908 | |
34e89507 JB |
909 | if (local->quiescing) |
910 | return; | |
d0709a65 | 911 | |
3393a608 JO |
912 | if (!timer_needed) |
913 | return; | |
914 | ||
26d59535 JB |
915 | mod_timer(&local->sta_cleanup, |
916 | round_jiffies(jiffies + STA_INFO_CLEANUP_INTERVAL)); | |
e9f207f0 | 917 | } |
e9f207f0 | 918 | |
f0706e82 JB |
919 | void sta_info_init(struct ieee80211_local *local) |
920 | { | |
4d33960b | 921 | spin_lock_init(&local->tim_lock); |
34e89507 | 922 | mutex_init(&local->sta_mtx); |
f0706e82 | 923 | INIT_LIST_HEAD(&local->sta_list); |
f0706e82 | 924 | |
b24b8a24 PE |
925 | setup_timer(&local->sta_cleanup, sta_info_cleanup, |
926 | (unsigned long)local); | |
f0706e82 JB |
927 | } |
928 | ||
929 | void sta_info_stop(struct ieee80211_local *local) | |
930 | { | |
f0706e82 | 931 | del_timer(&local->sta_cleanup); |
be8755e1 | 932 | sta_info_flush(local, NULL); |
f0706e82 JB |
933 | } |
934 | ||
f0706e82 JB |
935 | /** |
936 | * sta_info_flush - flush matching STA entries from the STA table | |
44213b5e JB |
937 | * |
938 | * Returns the number of removed STA entries. | |
939 | * | |
f0706e82 | 940 | * @local: local interface data |
d0709a65 | 941 | * @sdata: matching rule for the net device (sta->dev) or %NULL to match all STAs |
f0706e82 | 942 | */ |
44213b5e | 943 | int sta_info_flush(struct ieee80211_local *local, |
af8cdcd8 | 944 | struct ieee80211_sub_if_data *sdata) |
f0706e82 JB |
945 | { |
946 | struct sta_info *sta, *tmp; | |
44213b5e | 947 | int ret = 0; |
f0706e82 | 948 | |
d0709a65 | 949 | might_sleep(); |
be8755e1 | 950 | |
34e89507 | 951 | mutex_lock(&local->sta_mtx); |
d0709a65 | 952 | list_for_each_entry_safe(sta, tmp, &local->sta_list, list) { |
34e89507 JB |
953 | if (!sdata || sdata == sta->sdata) |
954 | WARN_ON(__sta_info_destroy(sta)); | |
be8755e1 | 955 | } |
34e89507 | 956 | mutex_unlock(&local->sta_mtx); |
44213b5e JB |
957 | |
958 | return ret; | |
f0706e82 | 959 | } |
dc6676b7 | 960 | |
24723d1b JB |
961 | void ieee80211_sta_expire(struct ieee80211_sub_if_data *sdata, |
962 | unsigned long exp_time) | |
963 | { | |
964 | struct ieee80211_local *local = sdata->local; | |
965 | struct sta_info *sta, *tmp; | |
24723d1b | 966 | |
34e89507 | 967 | mutex_lock(&local->sta_mtx); |
e46a2cf9 MSS |
968 | |
969 | list_for_each_entry_safe(sta, tmp, &local->sta_list, list) { | |
ec2b774e ML |
970 | if (sdata != sta->sdata) |
971 | continue; | |
972 | ||
24723d1b JB |
973 | if (time_after(jiffies, sta->last_rx + exp_time)) { |
974 | #ifdef CONFIG_MAC80211_IBSS_DEBUG | |
0c68ae26 | 975 | printk(KERN_DEBUG "%s: expiring inactive STA %pM\n", |
47846c9b | 976 | sdata->name, sta->sta.addr); |
24723d1b | 977 | #endif |
34e89507 | 978 | WARN_ON(__sta_info_destroy(sta)); |
24723d1b | 979 | } |
e46a2cf9 MSS |
980 | } |
981 | ||
34e89507 | 982 | mutex_unlock(&local->sta_mtx); |
24723d1b | 983 | } |
17741cdc | 984 | |
686b9cb9 BG |
985 | struct ieee80211_sta *ieee80211_find_sta_by_ifaddr(struct ieee80211_hw *hw, |
986 | const u8 *addr, | |
987 | const u8 *localaddr) | |
17741cdc | 988 | { |
abe60632 | 989 | struct sta_info *sta, *nxt; |
17741cdc | 990 | |
686b9cb9 BG |
991 | /* |
992 | * Just return a random station if localaddr is NULL | |
993 | * ... first in list. | |
994 | */ | |
f7c65594 | 995 | for_each_sta_info(hw_to_local(hw), addr, sta, nxt) { |
686b9cb9 BG |
996 | if (localaddr && |
997 | compare_ether_addr(sta->sdata->vif.addr, localaddr) != 0) | |
998 | continue; | |
f7c65594 JB |
999 | if (!sta->uploaded) |
1000 | return NULL; | |
abe60632 | 1001 | return &sta->sta; |
f7c65594 JB |
1002 | } |
1003 | ||
abe60632 | 1004 | return NULL; |
17741cdc | 1005 | } |
686b9cb9 | 1006 | EXPORT_SYMBOL_GPL(ieee80211_find_sta_by_ifaddr); |
5ed176e1 JB |
1007 | |
1008 | struct ieee80211_sta *ieee80211_find_sta(struct ieee80211_vif *vif, | |
1009 | const u8 *addr) | |
1010 | { | |
f7c65594 | 1011 | struct sta_info *sta; |
5ed176e1 JB |
1012 | |
1013 | if (!vif) | |
1014 | return NULL; | |
1015 | ||
f7c65594 JB |
1016 | sta = sta_info_get_bss(vif_to_sdata(vif), addr); |
1017 | if (!sta) | |
1018 | return NULL; | |
1019 | ||
1020 | if (!sta->uploaded) | |
1021 | return NULL; | |
5ed176e1 | 1022 | |
f7c65594 | 1023 | return &sta->sta; |
5ed176e1 | 1024 | } |
17741cdc | 1025 | EXPORT_SYMBOL(ieee80211_find_sta); |
af818581 | 1026 | |
50a9432d JB |
1027 | static void clear_sta_ps_flags(void *_sta) |
1028 | { | |
1029 | struct sta_info *sta = _sta; | |
608383bf | 1030 | struct ieee80211_sub_if_data *sdata = sta->sdata; |
50a9432d | 1031 | |
c2c98fde | 1032 | clear_sta_flag(sta, WLAN_STA_PS_DRIVER); |
608383bf HS |
1033 | if (test_and_clear_sta_flag(sta, WLAN_STA_PS_STA)) |
1034 | atomic_dec(&sdata->bss->num_sta_ps); | |
50a9432d JB |
1035 | } |
1036 | ||
af818581 JB |
1037 | /* powersave support code */ |
1038 | void ieee80211_sta_ps_deliver_wakeup(struct sta_info *sta) | |
1039 | { | |
1040 | struct ieee80211_sub_if_data *sdata = sta->sdata; | |
1041 | struct ieee80211_local *local = sdata->local; | |
948d887d JB |
1042 | struct sk_buff_head pending; |
1043 | int filtered = 0, buffered = 0, ac; | |
1044 | ||
c2c98fde | 1045 | clear_sta_flag(sta, WLAN_STA_SP); |
47086fc5 | 1046 | |
948d887d JB |
1047 | BUILD_BUG_ON(BITS_TO_LONGS(STA_TID_NUM) > 1); |
1048 | sta->driver_buffered_tids = 0; | |
af818581 | 1049 | |
d057e5a3 AN |
1050 | if (!(local->hw.flags & IEEE80211_HW_AP_LINK_PS)) |
1051 | drv_sta_notify(local, sdata, STA_NOTIFY_AWAKE, &sta->sta); | |
af818581 | 1052 | |
948d887d | 1053 | skb_queue_head_init(&pending); |
af818581 JB |
1054 | |
1055 | /* Send all buffered frames to the station */ | |
948d887d JB |
1056 | for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) { |
1057 | int count = skb_queue_len(&pending), tmp; | |
1058 | ||
1059 | skb_queue_splice_tail_init(&sta->tx_filtered[ac], &pending); | |
1060 | tmp = skb_queue_len(&pending); | |
1061 | filtered += tmp - count; | |
1062 | count = tmp; | |
1063 | ||
1064 | skb_queue_splice_tail_init(&sta->ps_tx_buf[ac], &pending); | |
1065 | tmp = skb_queue_len(&pending); | |
1066 | buffered += tmp - count; | |
1067 | } | |
1068 | ||
1069 | ieee80211_add_pending_skbs_fn(local, &pending, clear_sta_ps_flags, sta); | |
1070 | ||
af818581 JB |
1071 | local->total_ps_buffered -= buffered; |
1072 | ||
c868cb35 JB |
1073 | sta_info_recalc_tim(sta); |
1074 | ||
af818581 JB |
1075 | #ifdef CONFIG_MAC80211_VERBOSE_PS_DEBUG |
1076 | printk(KERN_DEBUG "%s: STA %pM aid %d sending %d filtered/%d PS frames " | |
47846c9b | 1077 | "since STA not sleeping anymore\n", sdata->name, |
948d887d | 1078 | sta->sta.addr, sta->sta.aid, filtered, buffered); |
af818581 JB |
1079 | #endif /* CONFIG_MAC80211_VERBOSE_PS_DEBUG */ |
1080 | } | |
1081 | ||
ce662b44 JB |
1082 | static void ieee80211_send_null_response(struct ieee80211_sub_if_data *sdata, |
1083 | struct sta_info *sta, int tid, | |
40b96408 | 1084 | enum ieee80211_frame_release_type reason) |
af818581 | 1085 | { |
af818581 | 1086 | struct ieee80211_local *local = sdata->local; |
ce662b44 | 1087 | struct ieee80211_qos_hdr *nullfunc; |
af818581 | 1088 | struct sk_buff *skb; |
ce662b44 JB |
1089 | int size = sizeof(*nullfunc); |
1090 | __le16 fc; | |
c2c98fde | 1091 | bool qos = test_sta_flag(sta, WLAN_STA_WME); |
ce662b44 | 1092 | struct ieee80211_tx_info *info; |
af818581 | 1093 | |
ce662b44 JB |
1094 | if (qos) { |
1095 | fc = cpu_to_le16(IEEE80211_FTYPE_DATA | | |
1096 | IEEE80211_STYPE_QOS_NULLFUNC | | |
1097 | IEEE80211_FCTL_FROMDS); | |
1098 | } else { | |
1099 | size -= 2; | |
1100 | fc = cpu_to_le16(IEEE80211_FTYPE_DATA | | |
1101 | IEEE80211_STYPE_NULLFUNC | | |
1102 | IEEE80211_FCTL_FROMDS); | |
af818581 | 1103 | } |
af818581 | 1104 | |
ce662b44 JB |
1105 | skb = dev_alloc_skb(local->hw.extra_tx_headroom + size); |
1106 | if (!skb) | |
1107 | return; | |
1108 | ||
1109 | skb_reserve(skb, local->hw.extra_tx_headroom); | |
1110 | ||
1111 | nullfunc = (void *) skb_put(skb, size); | |
1112 | nullfunc->frame_control = fc; | |
1113 | nullfunc->duration_id = 0; | |
1114 | memcpy(nullfunc->addr1, sta->sta.addr, ETH_ALEN); | |
1115 | memcpy(nullfunc->addr2, sdata->vif.addr, ETH_ALEN); | |
1116 | memcpy(nullfunc->addr3, sdata->vif.addr, ETH_ALEN); | |
1117 | ||
59b66255 JB |
1118 | skb->priority = tid; |
1119 | skb_set_queue_mapping(skb, ieee802_1d_to_ac[tid]); | |
ce662b44 | 1120 | if (qos) { |
ce662b44 JB |
1121 | nullfunc->qos_ctrl = cpu_to_le16(tid); |
1122 | ||
40b96408 | 1123 | if (reason == IEEE80211_FRAME_RELEASE_UAPSD) |
ce662b44 JB |
1124 | nullfunc->qos_ctrl |= |
1125 | cpu_to_le16(IEEE80211_QOS_CTL_EOSP); | |
1126 | } | |
1127 | ||
1128 | info = IEEE80211_SKB_CB(skb); | |
1129 | ||
1130 | /* | |
1131 | * Tell TX path to send this frame even though the | |
1132 | * STA may still remain is PS mode after this frame | |
deeaee19 JB |
1133 | * exchange. Also set EOSP to indicate this packet |
1134 | * ends the poll/service period. | |
ce662b44 | 1135 | */ |
deeaee19 JB |
1136 | info->flags |= IEEE80211_TX_CTL_POLL_RESPONSE | |
1137 | IEEE80211_TX_STATUS_EOSP | | |
1138 | IEEE80211_TX_CTL_REQ_TX_STATUS; | |
ce662b44 | 1139 | |
40b96408 JB |
1140 | drv_allow_buffered_frames(local, sta, BIT(tid), 1, reason, false); |
1141 | ||
ce662b44 JB |
1142 | ieee80211_xmit(sdata, skb); |
1143 | } | |
1144 | ||
47086fc5 JB |
1145 | static void |
1146 | ieee80211_sta_ps_deliver_response(struct sta_info *sta, | |
1147 | int n_frames, u8 ignored_acs, | |
1148 | enum ieee80211_frame_release_type reason) | |
af818581 JB |
1149 | { |
1150 | struct ieee80211_sub_if_data *sdata = sta->sdata; | |
1151 | struct ieee80211_local *local = sdata->local; | |
4049e09a | 1152 | bool found = false; |
948d887d JB |
1153 | bool more_data = false; |
1154 | int ac; | |
4049e09a | 1155 | unsigned long driver_release_tids = 0; |
47086fc5 | 1156 | struct sk_buff_head frames; |
af818581 | 1157 | |
deeaee19 | 1158 | /* Service or PS-Poll period starts */ |
c2c98fde | 1159 | set_sta_flag(sta, WLAN_STA_SP); |
deeaee19 | 1160 | |
47086fc5 | 1161 | __skb_queue_head_init(&frames); |
948d887d JB |
1162 | |
1163 | /* | |
47086fc5 | 1164 | * Get response frame(s) and more data bit for it. |
948d887d JB |
1165 | */ |
1166 | for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) { | |
4049e09a JB |
1167 | unsigned long tids; |
1168 | ||
47086fc5 | 1169 | if (ignored_acs & BIT(ac)) |
948d887d JB |
1170 | continue; |
1171 | ||
4049e09a JB |
1172 | tids = ieee80211_tids_for_ac(ac); |
1173 | ||
1174 | if (!found) { | |
1175 | driver_release_tids = sta->driver_buffered_tids & tids; | |
1176 | if (driver_release_tids) { | |
1177 | found = true; | |
1178 | } else { | |
47086fc5 JB |
1179 | struct sk_buff *skb; |
1180 | ||
1181 | while (n_frames > 0) { | |
1182 | skb = skb_dequeue(&sta->tx_filtered[ac]); | |
1183 | if (!skb) { | |
1184 | skb = skb_dequeue( | |
1185 | &sta->ps_tx_buf[ac]); | |
1186 | if (skb) | |
1187 | local->total_ps_buffered--; | |
1188 | } | |
1189 | if (!skb) | |
1190 | break; | |
1191 | n_frames--; | |
4049e09a | 1192 | found = true; |
47086fc5 JB |
1193 | __skb_queue_tail(&frames, skb); |
1194 | } | |
948d887d | 1195 | } |
948d887d | 1196 | |
4049e09a JB |
1197 | /* |
1198 | * If the driver has data on more than one TID then | |
1199 | * certainly there's more data if we release just a | |
1200 | * single frame now (from a single TID). | |
1201 | */ | |
47086fc5 JB |
1202 | if (reason == IEEE80211_FRAME_RELEASE_PSPOLL && |
1203 | hweight16(driver_release_tids) > 1) { | |
4049e09a JB |
1204 | more_data = true; |
1205 | driver_release_tids = | |
1206 | BIT(ffs(driver_release_tids) - 1); | |
1207 | break; | |
1208 | } | |
1209 | } | |
948d887d JB |
1210 | |
1211 | if (!skb_queue_empty(&sta->tx_filtered[ac]) || | |
1212 | !skb_queue_empty(&sta->ps_tx_buf[ac])) { | |
1213 | more_data = true; | |
1214 | break; | |
1215 | } | |
af818581 | 1216 | } |
af818581 | 1217 | |
4049e09a | 1218 | if (!found) { |
ce662b44 | 1219 | int tid; |
af818581 JB |
1220 | |
1221 | /* | |
ce662b44 JB |
1222 | * For PS-Poll, this can only happen due to a race condition |
1223 | * when we set the TIM bit and the station notices it, but | |
1224 | * before it can poll for the frame we expire it. | |
1225 | * | |
1226 | * For uAPSD, this is said in the standard (11.2.1.5 h): | |
1227 | * At each unscheduled SP for a non-AP STA, the AP shall | |
1228 | * attempt to transmit at least one MSDU or MMPDU, but no | |
1229 | * more than the value specified in the Max SP Length field | |
1230 | * in the QoS Capability element from delivery-enabled ACs, | |
1231 | * that are destined for the non-AP STA. | |
1232 | * | |
1233 | * Since we have no other MSDU/MMPDU, transmit a QoS null frame. | |
af818581 | 1234 | */ |
af818581 | 1235 | |
ce662b44 JB |
1236 | /* This will evaluate to 1, 3, 5 or 7. */ |
1237 | tid = 7 - ((ffs(~ignored_acs) - 1) << 1); | |
af818581 | 1238 | |
40b96408 | 1239 | ieee80211_send_null_response(sdata, sta, tid, reason); |
4049e09a JB |
1240 | return; |
1241 | } | |
af818581 | 1242 | |
47086fc5 JB |
1243 | if (!driver_release_tids) { |
1244 | struct sk_buff_head pending; | |
1245 | struct sk_buff *skb; | |
40b96408 JB |
1246 | int num = 0; |
1247 | u16 tids = 0; | |
af818581 | 1248 | |
47086fc5 | 1249 | skb_queue_head_init(&pending); |
af818581 | 1250 | |
47086fc5 JB |
1251 | while ((skb = __skb_dequeue(&frames))) { |
1252 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); | |
1253 | struct ieee80211_hdr *hdr = (void *) skb->data; | |
40b96408 JB |
1254 | u8 *qoshdr = NULL; |
1255 | ||
1256 | num++; | |
af818581 | 1257 | |
47086fc5 JB |
1258 | /* |
1259 | * Tell TX path to send this frame even though the | |
1260 | * STA may still remain is PS mode after this frame | |
1261 | * exchange. | |
1262 | */ | |
1263 | info->flags |= IEEE80211_TX_CTL_POLL_RESPONSE; | |
1264 | ||
1265 | /* | |
1266 | * Use MoreData flag to indicate whether there are | |
1267 | * more buffered frames for this STA | |
1268 | */ | |
24b9c373 | 1269 | if (more_data || !skb_queue_empty(&frames)) |
47086fc5 JB |
1270 | hdr->frame_control |= |
1271 | cpu_to_le16(IEEE80211_FCTL_MOREDATA); | |
24b9c373 JD |
1272 | else |
1273 | hdr->frame_control &= | |
1274 | cpu_to_le16(~IEEE80211_FCTL_MOREDATA); | |
47086fc5 | 1275 | |
40b96408 JB |
1276 | if (ieee80211_is_data_qos(hdr->frame_control) || |
1277 | ieee80211_is_qos_nullfunc(hdr->frame_control)) | |
1278 | qoshdr = ieee80211_get_qos_ctl(hdr); | |
1279 | ||
1280 | /* set EOSP for the frame */ | |
47086fc5 | 1281 | if (reason == IEEE80211_FRAME_RELEASE_UAPSD && |
40b96408 JB |
1282 | qoshdr && skb_queue_empty(&frames)) |
1283 | *qoshdr |= IEEE80211_QOS_CTL_EOSP; | |
af818581 | 1284 | |
deeaee19 JB |
1285 | info->flags |= IEEE80211_TX_STATUS_EOSP | |
1286 | IEEE80211_TX_CTL_REQ_TX_STATUS; | |
1287 | ||
40b96408 JB |
1288 | if (qoshdr) |
1289 | tids |= BIT(*qoshdr & IEEE80211_QOS_CTL_TID_MASK); | |
1290 | else | |
1291 | tids |= BIT(0); | |
1292 | ||
47086fc5 JB |
1293 | __skb_queue_tail(&pending, skb); |
1294 | } | |
af818581 | 1295 | |
40b96408 JB |
1296 | drv_allow_buffered_frames(local, sta, tids, num, |
1297 | reason, more_data); | |
1298 | ||
47086fc5 | 1299 | ieee80211_add_pending_skbs(local, &pending); |
af818581 | 1300 | |
c868cb35 | 1301 | sta_info_recalc_tim(sta); |
af818581 JB |
1302 | } else { |
1303 | /* | |
4049e09a JB |
1304 | * We need to release a frame that is buffered somewhere in the |
1305 | * driver ... it'll have to handle that. | |
1306 | * Note that, as per the comment above, it'll also have to see | |
1307 | * if there is more than just one frame on the specific TID that | |
1308 | * we're releasing from, and it needs to set the more-data bit | |
1309 | * accordingly if we tell it that there's no more data. If we do | |
1310 | * tell it there's more data, then of course the more-data bit | |
1311 | * needs to be set anyway. | |
1312 | */ | |
1313 | drv_release_buffered_frames(local, sta, driver_release_tids, | |
47086fc5 | 1314 | n_frames, reason, more_data); |
4049e09a JB |
1315 | |
1316 | /* | |
1317 | * Note that we don't recalculate the TIM bit here as it would | |
1318 | * most likely have no effect at all unless the driver told us | |
1319 | * that the TID became empty before returning here from the | |
1320 | * release function. | |
1321 | * Either way, however, when the driver tells us that the TID | |
1322 | * became empty we'll do the TIM recalculation. | |
af818581 | 1323 | */ |
af818581 JB |
1324 | } |
1325 | } | |
1326 | ||
47086fc5 JB |
1327 | void ieee80211_sta_ps_deliver_poll_response(struct sta_info *sta) |
1328 | { | |
1329 | u8 ignore_for_response = sta->sta.uapsd_queues; | |
1330 | ||
1331 | /* | |
1332 | * If all ACs are delivery-enabled then we should reply | |
1333 | * from any of them, if only some are enabled we reply | |
1334 | * only from the non-enabled ones. | |
1335 | */ | |
1336 | if (ignore_for_response == BIT(IEEE80211_NUM_ACS) - 1) | |
1337 | ignore_for_response = 0; | |
1338 | ||
1339 | ieee80211_sta_ps_deliver_response(sta, 1, ignore_for_response, | |
1340 | IEEE80211_FRAME_RELEASE_PSPOLL); | |
1341 | } | |
1342 | ||
1343 | void ieee80211_sta_ps_deliver_uapsd(struct sta_info *sta) | |
1344 | { | |
1345 | int n_frames = sta->sta.max_sp; | |
1346 | u8 delivery_enabled = sta->sta.uapsd_queues; | |
1347 | ||
1348 | /* | |
1349 | * If we ever grow support for TSPEC this might happen if | |
1350 | * the TSPEC update from hostapd comes in between a trigger | |
1351 | * frame setting WLAN_STA_UAPSD in the RX path and this | |
1352 | * actually getting called. | |
1353 | */ | |
1354 | if (!delivery_enabled) | |
1355 | return; | |
1356 | ||
47086fc5 JB |
1357 | switch (sta->sta.max_sp) { |
1358 | case 1: | |
1359 | n_frames = 2; | |
1360 | break; | |
1361 | case 2: | |
1362 | n_frames = 4; | |
1363 | break; | |
1364 | case 3: | |
1365 | n_frames = 6; | |
1366 | break; | |
1367 | case 0: | |
1368 | /* XXX: what is a good value? */ | |
1369 | n_frames = 8; | |
1370 | break; | |
1371 | } | |
1372 | ||
1373 | ieee80211_sta_ps_deliver_response(sta, n_frames, ~delivery_enabled, | |
1374 | IEEE80211_FRAME_RELEASE_UAPSD); | |
1375 | } | |
1376 | ||
af818581 JB |
1377 | void ieee80211_sta_block_awake(struct ieee80211_hw *hw, |
1378 | struct ieee80211_sta *pubsta, bool block) | |
1379 | { | |
1380 | struct sta_info *sta = container_of(pubsta, struct sta_info, sta); | |
1381 | ||
b5878a2d JB |
1382 | trace_api_sta_block_awake(sta->local, pubsta, block); |
1383 | ||
af818581 | 1384 | if (block) |
c2c98fde JB |
1385 | set_sta_flag(sta, WLAN_STA_PS_DRIVER); |
1386 | else if (test_sta_flag(sta, WLAN_STA_PS_DRIVER)) | |
af818581 JB |
1387 | ieee80211_queue_work(hw, &sta->drv_unblock_wk); |
1388 | } | |
1389 | EXPORT_SYMBOL(ieee80211_sta_block_awake); | |
dcf55fb5 | 1390 | |
37fbd908 JB |
1391 | void ieee80211_sta_eosp_irqsafe(struct ieee80211_sta *pubsta) |
1392 | { | |
1393 | struct sta_info *sta = container_of(pubsta, struct sta_info, sta); | |
1394 | struct ieee80211_local *local = sta->local; | |
1395 | struct sk_buff *skb; | |
1396 | struct skb_eosp_msg_data *data; | |
1397 | ||
1398 | trace_api_eosp(local, pubsta); | |
1399 | ||
1400 | skb = alloc_skb(0, GFP_ATOMIC); | |
1401 | if (!skb) { | |
1402 | /* too bad ... but race is better than loss */ | |
1403 | clear_sta_flag(sta, WLAN_STA_SP); | |
1404 | return; | |
1405 | } | |
1406 | ||
1407 | data = (void *)skb->cb; | |
1408 | memcpy(data->sta, pubsta->addr, ETH_ALEN); | |
1409 | memcpy(data->iface, sta->sdata->vif.addr, ETH_ALEN); | |
1410 | skb->pkt_type = IEEE80211_EOSP_MSG; | |
1411 | skb_queue_tail(&local->skb_queue, skb); | |
1412 | tasklet_schedule(&local->tasklet); | |
1413 | } | |
1414 | EXPORT_SYMBOL(ieee80211_sta_eosp_irqsafe); | |
1415 | ||
042ec453 JB |
1416 | void ieee80211_sta_set_buffered(struct ieee80211_sta *pubsta, |
1417 | u8 tid, bool buffered) | |
dcf55fb5 FF |
1418 | { |
1419 | struct sta_info *sta = container_of(pubsta, struct sta_info, sta); | |
1420 | ||
948d887d | 1421 | if (WARN_ON(tid >= STA_TID_NUM)) |
042ec453 JB |
1422 | return; |
1423 | ||
948d887d JB |
1424 | if (buffered) |
1425 | set_bit(tid, &sta->driver_buffered_tids); | |
1426 | else | |
1427 | clear_bit(tid, &sta->driver_buffered_tids); | |
1428 | ||
c868cb35 | 1429 | sta_info_recalc_tim(sta); |
dcf55fb5 | 1430 | } |
042ec453 | 1431 | EXPORT_SYMBOL(ieee80211_sta_set_buffered); |
d9a7ddb0 | 1432 | |
83d5cc01 JB |
1433 | int sta_info_move_state(struct sta_info *sta, |
1434 | enum ieee80211_sta_state new_state) | |
d9a7ddb0 | 1435 | { |
8bf11d8d | 1436 | might_sleep(); |
d9a7ddb0 JB |
1437 | |
1438 | if (sta->sta_state == new_state) | |
1439 | return 0; | |
1440 | ||
f09603a2 JB |
1441 | /* check allowed transitions first */ |
1442 | ||
1443 | switch (new_state) { | |
1444 | case IEEE80211_STA_NONE: | |
1445 | if (sta->sta_state != IEEE80211_STA_AUTH) | |
1446 | return -EINVAL; | |
1447 | break; | |
1448 | case IEEE80211_STA_AUTH: | |
1449 | if (sta->sta_state != IEEE80211_STA_NONE && | |
1450 | sta->sta_state != IEEE80211_STA_ASSOC) | |
1451 | return -EINVAL; | |
1452 | break; | |
1453 | case IEEE80211_STA_ASSOC: | |
1454 | if (sta->sta_state != IEEE80211_STA_AUTH && | |
1455 | sta->sta_state != IEEE80211_STA_AUTHORIZED) | |
1456 | return -EINVAL; | |
1457 | break; | |
1458 | case IEEE80211_STA_AUTHORIZED: | |
1459 | if (sta->sta_state != IEEE80211_STA_ASSOC) | |
1460 | return -EINVAL; | |
1461 | break; | |
1462 | default: | |
1463 | WARN(1, "invalid state %d", new_state); | |
1464 | return -EINVAL; | |
1465 | } | |
1466 | ||
1467 | printk(KERN_DEBUG "%s: moving STA %pM to state %d\n", | |
1468 | sta->sdata->name, sta->sta.addr, new_state); | |
1469 | ||
1470 | /* | |
1471 | * notify the driver before the actual changes so it can | |
1472 | * fail the transition | |
1473 | */ | |
1474 | if (test_sta_flag(sta, WLAN_STA_INSERTED)) { | |
1475 | int err = drv_sta_state(sta->local, sta->sdata, sta, | |
1476 | sta->sta_state, new_state); | |
1477 | if (err) | |
1478 | return err; | |
1479 | } | |
1480 | ||
1481 | /* reflect the change in all state variables */ | |
1482 | ||
d9a7ddb0 JB |
1483 | switch (new_state) { |
1484 | case IEEE80211_STA_NONE: | |
1485 | if (sta->sta_state == IEEE80211_STA_AUTH) | |
1486 | clear_bit(WLAN_STA_AUTH, &sta->_flags); | |
d9a7ddb0 JB |
1487 | break; |
1488 | case IEEE80211_STA_AUTH: | |
1489 | if (sta->sta_state == IEEE80211_STA_NONE) | |
1490 | set_bit(WLAN_STA_AUTH, &sta->_flags); | |
1491 | else if (sta->sta_state == IEEE80211_STA_ASSOC) | |
1492 | clear_bit(WLAN_STA_ASSOC, &sta->_flags); | |
d9a7ddb0 JB |
1493 | break; |
1494 | case IEEE80211_STA_ASSOC: | |
29623892 | 1495 | if (sta->sta_state == IEEE80211_STA_AUTH) { |
d9a7ddb0 | 1496 | set_bit(WLAN_STA_ASSOC, &sta->_flags); |
29623892 JB |
1497 | } else if (sta->sta_state == IEEE80211_STA_AUTHORIZED) { |
1498 | if (sta->sdata->vif.type == NL80211_IFTYPE_AP) | |
1499 | atomic_dec(&sta->sdata->u.ap.num_sta_authorized); | |
d9a7ddb0 | 1500 | clear_bit(WLAN_STA_AUTHORIZED, &sta->_flags); |
f09603a2 | 1501 | } |
d9a7ddb0 JB |
1502 | break; |
1503 | case IEEE80211_STA_AUTHORIZED: | |
29623892 JB |
1504 | if (sta->sta_state == IEEE80211_STA_ASSOC) { |
1505 | if (sta->sdata->vif.type == NL80211_IFTYPE_AP) | |
1506 | atomic_inc(&sta->sdata->u.ap.num_sta_authorized); | |
d9a7ddb0 | 1507 | set_bit(WLAN_STA_AUTHORIZED, &sta->_flags); |
f09603a2 | 1508 | } |
d9a7ddb0 JB |
1509 | break; |
1510 | default: | |
f09603a2 | 1511 | break; |
d9a7ddb0 JB |
1512 | } |
1513 | ||
d9a7ddb0 JB |
1514 | sta->sta_state = new_state; |
1515 | ||
1516 | return 0; | |
1517 | } |