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> |
f0706e82 JB |
18 | |
19 | #include <net/mac80211.h> | |
20 | #include "ieee80211_i.h" | |
21 | #include "ieee80211_rate.h" | |
22 | #include "sta_info.h" | |
e9f207f0 | 23 | #include "debugfs_sta.h" |
ee385855 | 24 | #include "mesh.h" |
f0706e82 JB |
25 | |
26 | /* Caller must hold local->sta_lock */ | |
27 | static void sta_info_hash_add(struct ieee80211_local *local, | |
28 | struct sta_info *sta) | |
29 | { | |
30 | sta->hnext = local->sta_hash[STA_HASH(sta->addr)]; | |
31 | local->sta_hash[STA_HASH(sta->addr)] = sta; | |
32 | } | |
33 | ||
34 | ||
35 | /* Caller must hold local->sta_lock */ | |
be8755e1 MW |
36 | static int sta_info_hash_del(struct ieee80211_local *local, |
37 | struct sta_info *sta) | |
f0706e82 JB |
38 | { |
39 | struct sta_info *s; | |
40 | ||
41 | s = local->sta_hash[STA_HASH(sta->addr)]; | |
42 | if (!s) | |
be8755e1 MW |
43 | return -ENOENT; |
44 | if (s == sta) { | |
f0706e82 | 45 | local->sta_hash[STA_HASH(sta->addr)] = s->hnext; |
be8755e1 | 46 | return 0; |
f0706e82 JB |
47 | } |
48 | ||
be8755e1 | 49 | while (s->hnext && s->hnext != sta) |
f0706e82 | 50 | s = s->hnext; |
be8755e1 MW |
51 | if (s->hnext) { |
52 | s->hnext = sta->hnext; | |
53 | return 0; | |
54 | } | |
f0706e82 | 55 | |
be8755e1 | 56 | return -ENOENT; |
f0706e82 JB |
57 | } |
58 | ||
43ba7e95 JB |
59 | /* must hold local->sta_lock */ |
60 | static struct sta_info *__sta_info_find(struct ieee80211_local *local, | |
61 | u8 *addr) | |
f0706e82 JB |
62 | { |
63 | struct sta_info *sta; | |
64 | ||
f0706e82 JB |
65 | sta = local->sta_hash[STA_HASH(addr)]; |
66 | while (sta) { | |
43ba7e95 | 67 | if (compare_ether_addr(sta->addr, addr) == 0) |
f0706e82 | 68 | break; |
f0706e82 JB |
69 | sta = sta->hnext; |
70 | } | |
43ba7e95 JB |
71 | return sta; |
72 | } | |
73 | ||
74 | struct sta_info *sta_info_get(struct ieee80211_local *local, u8 *addr) | |
75 | { | |
76 | struct sta_info *sta; | |
77 | ||
78 | read_lock_bh(&local->sta_lock); | |
79 | sta = __sta_info_find(local, addr); | |
80 | if (sta) | |
81 | __sta_info_get(sta); | |
be8755e1 | 82 | read_unlock_bh(&local->sta_lock); |
f0706e82 JB |
83 | |
84 | return sta; | |
85 | } | |
86 | EXPORT_SYMBOL(sta_info_get); | |
87 | ||
ee385855 LCC |
88 | struct sta_info *sta_info_get_by_idx(struct ieee80211_local *local, int idx, |
89 | struct net_device *dev) | |
90 | { | |
91 | struct sta_info *sta; | |
92 | int i = 0; | |
93 | ||
94 | read_lock_bh(&local->sta_lock); | |
95 | list_for_each_entry(sta, &local->sta_list, list) { | |
96 | if (i < idx) { | |
97 | ++i; | |
98 | continue; | |
99 | } else if (!dev || dev == sta->dev) { | |
100 | __sta_info_get(sta); | |
101 | read_unlock_bh(&local->sta_lock); | |
102 | return sta; | |
103 | } | |
104 | } | |
105 | read_unlock_bh(&local->sta_lock); | |
106 | ||
107 | return NULL; | |
108 | } | |
f0706e82 JB |
109 | |
110 | static void sta_info_release(struct kref *kref) | |
111 | { | |
112 | struct sta_info *sta = container_of(kref, struct sta_info, kref); | |
113 | struct ieee80211_local *local = sta->local; | |
114 | struct sk_buff *skb; | |
07db2183 | 115 | int i; |
f0706e82 JB |
116 | |
117 | /* free sta structure; it has already been removed from | |
118 | * hash table etc. external structures. Make sure that all | |
119 | * buffered frames are release (one might have been added | |
120 | * after sta_info_free() was called). */ | |
121 | while ((skb = skb_dequeue(&sta->ps_tx_buf)) != NULL) { | |
122 | local->total_ps_buffered--; | |
123 | dev_kfree_skb_any(skb); | |
124 | } | |
125 | while ((skb = skb_dequeue(&sta->tx_filtered)) != NULL) { | |
126 | dev_kfree_skb_any(skb); | |
127 | } | |
fe3bf0f5 | 128 | for (i = 0; i < STA_TID_NUM; i++) { |
07db2183 | 129 | del_timer_sync(&sta->ampdu_mlme.tid_rx[i].session_timer); |
fe3bf0f5 RR |
130 | del_timer_sync(&sta->ampdu_mlme.tid_tx[i].addba_resp_timer); |
131 | } | |
f0706e82 JB |
132 | rate_control_free_sta(sta->rate_ctrl, sta->rate_ctrl_priv); |
133 | rate_control_put(sta->rate_ctrl); | |
134 | kfree(sta); | |
135 | } | |
136 | ||
137 | ||
138 | void sta_info_put(struct sta_info *sta) | |
139 | { | |
140 | kref_put(&sta->kref, sta_info_release); | |
141 | } | |
142 | EXPORT_SYMBOL(sta_info_put); | |
143 | ||
144 | ||
43ba7e95 JB |
145 | struct sta_info *sta_info_add(struct ieee80211_local *local, |
146 | struct net_device *dev, u8 *addr, gfp_t gfp) | |
f0706e82 JB |
147 | { |
148 | struct sta_info *sta; | |
16c5f15c | 149 | int i; |
0795af57 | 150 | DECLARE_MAC_BUF(mac); |
f0706e82 JB |
151 | |
152 | sta = kzalloc(sizeof(*sta), gfp); | |
153 | if (!sta) | |
43ba7e95 | 154 | return ERR_PTR(-ENOMEM); |
f0706e82 JB |
155 | |
156 | kref_init(&sta->kref); | |
157 | ||
158 | sta->rate_ctrl = rate_control_get(local->rate_ctrl); | |
159 | sta->rate_ctrl_priv = rate_control_alloc_sta(sta->rate_ctrl, gfp); | |
160 | if (!sta->rate_ctrl_priv) { | |
161 | rate_control_put(sta->rate_ctrl); | |
f0706e82 | 162 | kfree(sta); |
43ba7e95 | 163 | return ERR_PTR(-ENOMEM); |
f0706e82 JB |
164 | } |
165 | ||
166 | memcpy(sta->addr, addr, ETH_ALEN); | |
167 | sta->local = local; | |
168 | sta->dev = dev; | |
16c5f15c | 169 | spin_lock_init(&sta->ampdu_mlme.ampdu_rx); |
fe3bf0f5 | 170 | spin_lock_init(&sta->ampdu_mlme.ampdu_tx); |
16c5f15c RR |
171 | for (i = 0; i < STA_TID_NUM; i++) { |
172 | /* timer_to_tid must be initialized with identity mapping to | |
173 | * enable session_timer's data differentiation. refer to | |
174 | * sta_rx_agg_session_timer_expired for useage */ | |
175 | sta->timer_to_tid[i] = i; | |
fe3bf0f5 RR |
176 | /* tid to tx queue: initialize according to HW (0 is valid) */ |
177 | sta->tid_to_tx_q[i] = local->hw.queues; | |
16c5f15c RR |
178 | /* rx timers */ |
179 | sta->ampdu_mlme.tid_rx[i].session_timer.function = | |
180 | sta_rx_agg_session_timer_expired; | |
181 | sta->ampdu_mlme.tid_rx[i].session_timer.data = | |
182 | (unsigned long)&sta->timer_to_tid[i]; | |
183 | init_timer(&sta->ampdu_mlme.tid_rx[i].session_timer); | |
fe3bf0f5 RR |
184 | /* tx timers */ |
185 | sta->ampdu_mlme.tid_tx[i].addba_resp_timer.function = | |
186 | sta_addba_resp_timer_expired; | |
187 | sta->ampdu_mlme.tid_tx[i].addba_resp_timer.data = | |
188 | (unsigned long)&sta->timer_to_tid[i]; | |
189 | init_timer(&sta->ampdu_mlme.tid_tx[i].addba_resp_timer); | |
16c5f15c | 190 | } |
f0706e82 JB |
191 | skb_queue_head_init(&sta->ps_tx_buf); |
192 | skb_queue_head_init(&sta->tx_filtered); | |
be8755e1 | 193 | write_lock_bh(&local->sta_lock); |
43ba7e95 JB |
194 | /* mark sta as used (by caller) */ |
195 | __sta_info_get(sta); | |
196 | /* check if STA exists already */ | |
197 | if (__sta_info_find(local, addr)) { | |
198 | write_unlock_bh(&local->sta_lock); | |
199 | sta_info_put(sta); | |
200 | return ERR_PTR(-EEXIST); | |
201 | } | |
f0706e82 JB |
202 | list_add(&sta->list, &local->sta_list); |
203 | local->num_sta++; | |
204 | sta_info_hash_add(local, sta); | |
32bfd35d JB |
205 | if (local->ops->sta_notify) { |
206 | struct ieee80211_sub_if_data *sdata; | |
207 | ||
208 | sdata = IEEE80211_DEV_TO_SUB_IF(dev); | |
51fb61e7 | 209 | if (sdata->vif.type == IEEE80211_IF_TYPE_VLAN) |
32bfd35d JB |
210 | sdata = sdata->u.vlan.ap; |
211 | ||
212 | local->ops->sta_notify(local_to_hw(local), &sdata->vif, | |
213 | STA_NOTIFY_ADD, addr); | |
214 | } | |
be8755e1 | 215 | write_unlock_bh(&local->sta_lock); |
f0706e82 JB |
216 | |
217 | #ifdef CONFIG_MAC80211_VERBOSE_DEBUG | |
0795af57 | 218 | printk(KERN_DEBUG "%s: Added STA %s\n", |
dd1cd4c6 | 219 | wiphy_name(local->hw.wiphy), print_mac(mac, addr)); |
f0706e82 JB |
220 | #endif /* CONFIG_MAC80211_VERBOSE_DEBUG */ |
221 | ||
e9f207f0 | 222 | #ifdef CONFIG_MAC80211_DEBUGFS |
be8755e1 MW |
223 | /* debugfs entry adding might sleep, so schedule process |
224 | * context task for adding entry for STAs that do not yet | |
225 | * have one. */ | |
226 | queue_work(local->hw.workqueue, &local->sta_debugfs_add); | |
e9f207f0 JB |
227 | #endif |
228 | ||
f0706e82 JB |
229 | return sta; |
230 | } | |
231 | ||
004c872e JB |
232 | static inline void __bss_tim_set(struct ieee80211_if_ap *bss, u16 aid) |
233 | { | |
234 | /* | |
235 | * This format has been mandated by the IEEE specifications, | |
236 | * so this line may not be changed to use the __set_bit() format. | |
237 | */ | |
238 | bss->tim[aid / 8] |= (1 << (aid % 8)); | |
239 | } | |
240 | ||
241 | static inline void __bss_tim_clear(struct ieee80211_if_ap *bss, u16 aid) | |
242 | { | |
243 | /* | |
244 | * This format has been mandated by the IEEE specifications, | |
245 | * so this line may not be changed to use the __clear_bit() format. | |
246 | */ | |
247 | bss->tim[aid / 8] &= ~(1 << (aid % 8)); | |
248 | } | |
249 | ||
250 | static void __sta_info_set_tim_bit(struct ieee80211_if_ap *bss, | |
251 | struct sta_info *sta) | |
252 | { | |
253 | if (bss) | |
254 | __bss_tim_set(bss, sta->aid); | |
255 | if (sta->local->ops->set_tim) | |
256 | sta->local->ops->set_tim(local_to_hw(sta->local), sta->aid, 1); | |
257 | } | |
258 | ||
259 | void sta_info_set_tim_bit(struct sta_info *sta) | |
260 | { | |
261 | struct ieee80211_sub_if_data *sdata; | |
262 | ||
263 | sdata = IEEE80211_DEV_TO_SUB_IF(sta->dev); | |
264 | ||
265 | read_lock_bh(&sta->local->sta_lock); | |
266 | __sta_info_set_tim_bit(sdata->bss, sta); | |
267 | read_unlock_bh(&sta->local->sta_lock); | |
268 | } | |
269 | ||
270 | static void __sta_info_clear_tim_bit(struct ieee80211_if_ap *bss, | |
271 | struct sta_info *sta) | |
272 | { | |
273 | if (bss) | |
274 | __bss_tim_clear(bss, sta->aid); | |
275 | if (sta->local->ops->set_tim) | |
276 | sta->local->ops->set_tim(local_to_hw(sta->local), sta->aid, 0); | |
277 | } | |
278 | ||
279 | void sta_info_clear_tim_bit(struct sta_info *sta) | |
280 | { | |
281 | struct ieee80211_sub_if_data *sdata; | |
282 | ||
283 | sdata = IEEE80211_DEV_TO_SUB_IF(sta->dev); | |
284 | ||
285 | read_lock_bh(&sta->local->sta_lock); | |
286 | __sta_info_clear_tim_bit(sdata->bss, sta); | |
287 | read_unlock_bh(&sta->local->sta_lock); | |
288 | } | |
289 | ||
be8755e1 MW |
290 | /* Caller must hold local->sta_lock */ |
291 | void sta_info_remove(struct sta_info *sta) | |
f0706e82 JB |
292 | { |
293 | struct ieee80211_local *local = sta->local; | |
294 | struct ieee80211_sub_if_data *sdata; | |
295 | ||
be8755e1 MW |
296 | /* don't do anything if we've been removed already */ |
297 | if (sta_info_hash_del(local, sta)) | |
298 | return; | |
299 | ||
f0706e82 JB |
300 | list_del(&sta->list); |
301 | sdata = IEEE80211_DEV_TO_SUB_IF(sta->dev); | |
302 | if (sta->flags & WLAN_STA_PS) { | |
303 | sta->flags &= ~WLAN_STA_PS; | |
304 | if (sdata->bss) | |
305 | atomic_dec(&sdata->bss->num_sta_ps); | |
004c872e | 306 | __sta_info_clear_tim_bit(sdata->bss, sta); |
f0706e82 JB |
307 | } |
308 | local->num_sta--; | |
ee385855 | 309 | |
902acc78 | 310 | if (ieee80211_vif_is_mesh(&sdata->vif)) |
ee385855 | 311 | mesh_accept_plinks_update(sdata->dev); |
f0706e82 JB |
312 | } |
313 | ||
be8755e1 | 314 | void sta_info_free(struct sta_info *sta) |
f0706e82 JB |
315 | { |
316 | struct sk_buff *skb; | |
317 | struct ieee80211_local *local = sta->local; | |
ee385855 LCC |
318 | struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(sta->dev); |
319 | ||
0795af57 | 320 | DECLARE_MAC_BUF(mac); |
f0706e82 | 321 | |
be8755e1 MW |
322 | might_sleep(); |
323 | ||
324 | write_lock_bh(&local->sta_lock); | |
325 | sta_info_remove(sta); | |
326 | write_unlock_bh(&local->sta_lock); | |
f0706e82 | 327 | |
902acc78 | 328 | if (ieee80211_vif_is_mesh(&sdata->vif)) |
ee385855 | 329 | mesh_plink_deactivate(sta); |
ee385855 | 330 | |
f0706e82 JB |
331 | while ((skb = skb_dequeue(&sta->ps_tx_buf)) != NULL) { |
332 | local->total_ps_buffered--; | |
be8755e1 | 333 | dev_kfree_skb(skb); |
f0706e82 JB |
334 | } |
335 | while ((skb = skb_dequeue(&sta->tx_filtered)) != NULL) { | |
be8755e1 | 336 | dev_kfree_skb(skb); |
f0706e82 JB |
337 | } |
338 | ||
be8755e1 | 339 | #ifdef CONFIG_MAC80211_VERBOSE_DEBUG |
0795af57 | 340 | printk(KERN_DEBUG "%s: Removed STA %s\n", |
dd1cd4c6 | 341 | wiphy_name(local->hw.wiphy), print_mac(mac, sta->addr)); |
be8755e1 MW |
342 | #endif /* CONFIG_MAC80211_VERBOSE_DEBUG */ |
343 | ||
11a843b7 | 344 | ieee80211_key_free(sta->key); |
db4d1169 | 345 | WARN_ON(sta->key); |
be8755e1 | 346 | |
32bfd35d | 347 | if (local->ops->sta_notify) { |
32bfd35d | 348 | |
51fb61e7 | 349 | if (sdata->vif.type == IEEE80211_IF_TYPE_VLAN) |
32bfd35d JB |
350 | sdata = sdata->u.vlan.ap; |
351 | ||
352 | local->ops->sta_notify(local_to_hw(local), &sdata->vif, | |
353 | STA_NOTIFY_REMOVE, sta->addr); | |
354 | } | |
478f8d2b | 355 | |
be8755e1 MW |
356 | rate_control_remove_sta_debugfs(sta); |
357 | ieee80211_sta_debugfs_remove(sta); | |
358 | ||
359 | sta_info_put(sta); | |
f0706e82 JB |
360 | } |
361 | ||
362 | ||
363 | static inline int sta_info_buffer_expired(struct ieee80211_local *local, | |
364 | struct sta_info *sta, | |
365 | struct sk_buff *skb) | |
366 | { | |
367 | struct ieee80211_tx_packet_data *pkt_data; | |
368 | int timeout; | |
369 | ||
370 | if (!skb) | |
371 | return 0; | |
372 | ||
373 | pkt_data = (struct ieee80211_tx_packet_data *) skb->cb; | |
374 | ||
375 | /* Timeout: (2 * listen_interval * beacon_int * 1024 / 1000000) sec */ | |
376 | timeout = (sta->listen_interval * local->hw.conf.beacon_int * 32 / | |
377 | 15625) * HZ; | |
378 | if (timeout < STA_TX_BUFFER_EXPIRE) | |
379 | timeout = STA_TX_BUFFER_EXPIRE; | |
380 | return time_after(jiffies, pkt_data->jiffies + timeout); | |
381 | } | |
382 | ||
383 | ||
384 | static void sta_info_cleanup_expire_buffered(struct ieee80211_local *local, | |
385 | struct sta_info *sta) | |
386 | { | |
387 | unsigned long flags; | |
388 | struct sk_buff *skb; | |
836341a7 | 389 | struct ieee80211_sub_if_data *sdata; |
0795af57 | 390 | DECLARE_MAC_BUF(mac); |
f0706e82 JB |
391 | |
392 | if (skb_queue_empty(&sta->ps_tx_buf)) | |
393 | return; | |
394 | ||
395 | for (;;) { | |
396 | spin_lock_irqsave(&sta->ps_tx_buf.lock, flags); | |
397 | skb = skb_peek(&sta->ps_tx_buf); | |
836341a7 | 398 | if (sta_info_buffer_expired(local, sta, skb)) |
f0706e82 | 399 | skb = __skb_dequeue(&sta->ps_tx_buf); |
836341a7 | 400 | else |
f0706e82 JB |
401 | skb = NULL; |
402 | spin_unlock_irqrestore(&sta->ps_tx_buf.lock, flags); | |
403 | ||
836341a7 | 404 | if (!skb) |
f0706e82 | 405 | break; |
836341a7 JB |
406 | |
407 | sdata = IEEE80211_DEV_TO_SUB_IF(sta->dev); | |
408 | local->total_ps_buffered--; | |
409 | printk(KERN_DEBUG "Buffered frame expired (STA " | |
410 | "%s)\n", print_mac(mac, sta->addr)); | |
411 | dev_kfree_skb(skb); | |
412 | ||
004c872e JB |
413 | if (skb_queue_empty(&sta->ps_tx_buf)) |
414 | sta_info_clear_tim_bit(sta); | |
f0706e82 JB |
415 | } |
416 | } | |
417 | ||
418 | ||
419 | static void sta_info_cleanup(unsigned long data) | |
420 | { | |
421 | struct ieee80211_local *local = (struct ieee80211_local *) data; | |
422 | struct sta_info *sta; | |
423 | ||
be8755e1 | 424 | read_lock_bh(&local->sta_lock); |
f0706e82 JB |
425 | list_for_each_entry(sta, &local->sta_list, list) { |
426 | __sta_info_get(sta); | |
427 | sta_info_cleanup_expire_buffered(local, sta); | |
428 | sta_info_put(sta); | |
429 | } | |
be8755e1 | 430 | read_unlock_bh(&local->sta_lock); |
f0706e82 | 431 | |
0d174406 JB |
432 | local->sta_cleanup.expires = |
433 | round_jiffies(jiffies + STA_INFO_CLEANUP_INTERVAL); | |
f0706e82 JB |
434 | add_timer(&local->sta_cleanup); |
435 | } | |
436 | ||
e9f207f0 JB |
437 | #ifdef CONFIG_MAC80211_DEBUGFS |
438 | static void sta_info_debugfs_add_task(struct work_struct *work) | |
439 | { | |
440 | struct ieee80211_local *local = | |
441 | container_of(work, struct ieee80211_local, sta_debugfs_add); | |
442 | struct sta_info *sta, *tmp; | |
443 | ||
e9f207f0 JB |
444 | while (1) { |
445 | sta = NULL; | |
be8755e1 | 446 | read_lock_bh(&local->sta_lock); |
e9f207f0 | 447 | list_for_each_entry(tmp, &local->sta_list, list) { |
be8755e1 | 448 | if (!tmp->debugfs.dir) { |
e9f207f0 JB |
449 | sta = tmp; |
450 | __sta_info_get(sta); | |
451 | break; | |
452 | } | |
453 | } | |
be8755e1 | 454 | read_unlock_bh(&local->sta_lock); |
e9f207f0 JB |
455 | |
456 | if (!sta) | |
457 | break; | |
458 | ||
e9f207f0 JB |
459 | ieee80211_sta_debugfs_add(sta); |
460 | rate_control_add_sta_debugfs(sta); | |
461 | sta_info_put(sta); | |
462 | } | |
463 | } | |
464 | #endif | |
465 | ||
f0706e82 JB |
466 | void sta_info_init(struct ieee80211_local *local) |
467 | { | |
be8755e1 | 468 | rwlock_init(&local->sta_lock); |
f0706e82 | 469 | INIT_LIST_HEAD(&local->sta_list); |
f0706e82 | 470 | |
b24b8a24 PE |
471 | setup_timer(&local->sta_cleanup, sta_info_cleanup, |
472 | (unsigned long)local); | |
0d174406 JB |
473 | local->sta_cleanup.expires = |
474 | round_jiffies(jiffies + STA_INFO_CLEANUP_INTERVAL); | |
e9f207f0 JB |
475 | |
476 | #ifdef CONFIG_MAC80211_DEBUGFS | |
477 | INIT_WORK(&local->sta_debugfs_add, sta_info_debugfs_add_task); | |
478 | #endif | |
f0706e82 JB |
479 | } |
480 | ||
481 | int sta_info_start(struct ieee80211_local *local) | |
482 | { | |
483 | add_timer(&local->sta_cleanup); | |
484 | return 0; | |
485 | } | |
486 | ||
487 | void sta_info_stop(struct ieee80211_local *local) | |
488 | { | |
f0706e82 | 489 | del_timer(&local->sta_cleanup); |
be8755e1 | 490 | sta_info_flush(local, NULL); |
f0706e82 JB |
491 | } |
492 | ||
f0706e82 JB |
493 | /** |
494 | * sta_info_flush - flush matching STA entries from the STA table | |
495 | * @local: local interface data | |
496 | * @dev: matching rule for the net device (sta->dev) or %NULL to match all STAs | |
497 | */ | |
498 | void sta_info_flush(struct ieee80211_local *local, struct net_device *dev) | |
499 | { | |
500 | struct sta_info *sta, *tmp; | |
be8755e1 | 501 | LIST_HEAD(tmp_list); |
f0706e82 | 502 | |
be8755e1 | 503 | write_lock_bh(&local->sta_lock); |
f0706e82 | 504 | list_for_each_entry_safe(sta, tmp, &local->sta_list, list) |
be8755e1 MW |
505 | if (!dev || dev == sta->dev) { |
506 | __sta_info_get(sta); | |
507 | sta_info_remove(sta); | |
508 | list_add_tail(&sta->list, &tmp_list); | |
509 | } | |
510 | write_unlock_bh(&local->sta_lock); | |
511 | ||
512 | list_for_each_entry_safe(sta, tmp, &tmp_list, list) { | |
513 | sta_info_free(sta); | |
514 | sta_info_put(sta); | |
515 | } | |
f0706e82 | 516 | } |