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fe7a5d5c JB |
1 | /* |
2 | * Copyright 2002-2005, Instant802 Networks, Inc. | |
3 | * Copyright 2005-2006, Devicescape Software, Inc. | |
4 | * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz> | |
026331c4 | 5 | * Copyright 2008-2010 Johannes Berg <johannes@sipsolutions.net> |
d98ad83e | 6 | * Copyright 2013-2014 Intel Mobile Communications GmbH |
fe7a5d5c JB |
7 | * |
8 | * This program is free software; you can redistribute it and/or modify | |
9 | * it under the terms of the GNU General Public License version 2 as | |
10 | * published by the Free Software Foundation. | |
11 | */ | |
12 | ||
bc3b2d7f | 13 | #include <linux/export.h> |
888d04df | 14 | #include <linux/etherdevice.h> |
fe7a5d5c | 15 | #include <net/mac80211.h> |
d26ad377 | 16 | #include <asm/unaligned.h> |
fe7a5d5c JB |
17 | #include "ieee80211_i.h" |
18 | #include "rate.h" | |
19 | #include "mesh.h" | |
20 | #include "led.h" | |
948d887d | 21 | #include "wme.h" |
fe7a5d5c JB |
22 | |
23 | ||
24 | void ieee80211_tx_status_irqsafe(struct ieee80211_hw *hw, | |
25 | struct sk_buff *skb) | |
26 | { | |
27 | struct ieee80211_local *local = hw_to_local(hw); | |
28 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); | |
29 | int tmp; | |
30 | ||
31 | skb->pkt_type = IEEE80211_TX_STATUS_MSG; | |
32 | skb_queue_tail(info->flags & IEEE80211_TX_CTL_REQ_TX_STATUS ? | |
33 | &local->skb_queue : &local->skb_queue_unreliable, skb); | |
34 | tmp = skb_queue_len(&local->skb_queue) + | |
35 | skb_queue_len(&local->skb_queue_unreliable); | |
36 | while (tmp > IEEE80211_IRQSAFE_QUEUE_LIMIT && | |
37 | (skb = skb_dequeue(&local->skb_queue_unreliable))) { | |
c3e7724b | 38 | ieee80211_free_txskb(hw, skb); |
fe7a5d5c JB |
39 | tmp--; |
40 | I802_DEBUG_INC(local->tx_status_drop); | |
41 | } | |
42 | tasklet_schedule(&local->tasklet); | |
43 | } | |
44 | EXPORT_SYMBOL(ieee80211_tx_status_irqsafe); | |
45 | ||
46 | static void ieee80211_handle_filtered_frame(struct ieee80211_local *local, | |
47 | struct sta_info *sta, | |
48 | struct sk_buff *skb) | |
49 | { | |
50 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); | |
948d887d JB |
51 | struct ieee80211_hdr *hdr = (void *)skb->data; |
52 | int ac; | |
fe7a5d5c | 53 | |
697e6a0f JB |
54 | /* |
55 | * This skb 'survived' a round-trip through the driver, and | |
56 | * hopefully the driver didn't mangle it too badly. However, | |
77c2061d | 57 | * we can definitely not rely on the control information |
c6fcf6bc JB |
58 | * being correct. Clear it so we don't get junk there, and |
59 | * indicate that it needs new processing, but must not be | |
60 | * modified/encrypted again. | |
697e6a0f JB |
61 | */ |
62 | memset(&info->control, 0, sizeof(info->control)); | |
18c94907 JB |
63 | |
64 | info->control.jiffies = jiffies; | |
65 | info->control.vif = &sta->sdata->vif; | |
c6fcf6bc JB |
66 | info->flags |= IEEE80211_TX_INTFL_NEED_TXPROCESSING | |
67 | IEEE80211_TX_INTFL_RETRANSMISSION; | |
eb7d3066 | 68 | info->flags &= ~IEEE80211_TX_TEMPORARY_FLAGS; |
697e6a0f | 69 | |
fe7a5d5c JB |
70 | sta->tx_filtered_count++; |
71 | ||
8a8656fa JB |
72 | /* |
73 | * Clear more-data bit on filtered frames, it might be set | |
74 | * but later frames might time out so it might have to be | |
75 | * clear again ... It's all rather unlikely (this frame | |
76 | * should time out first, right?) but let's not confuse | |
77 | * peers unnecessarily. | |
78 | */ | |
79 | if (hdr->frame_control & cpu_to_le16(IEEE80211_FCTL_MOREDATA)) | |
80 | hdr->frame_control &= ~cpu_to_le16(IEEE80211_FCTL_MOREDATA); | |
81 | ||
948d887d | 82 | if (ieee80211_is_data_qos(hdr->frame_control)) { |
47086fc5 JB |
83 | u8 *p = ieee80211_get_qos_ctl(hdr); |
84 | int tid = *p & IEEE80211_QOS_CTL_TID_MASK; | |
85 | ||
86 | /* | |
87 | * Clear EOSP if set, this could happen e.g. | |
88 | * if an absence period (us being a P2P GO) | |
89 | * shortens the SP. | |
90 | */ | |
91 | if (*p & IEEE80211_QOS_CTL_EOSP) | |
92 | *p &= ~IEEE80211_QOS_CTL_EOSP; | |
948d887d JB |
93 | ac = ieee802_1d_to_ac[tid & 7]; |
94 | } else { | |
95 | ac = IEEE80211_AC_BE; | |
96 | } | |
97 | ||
fe7a5d5c JB |
98 | /* |
99 | * Clear the TX filter mask for this STA when sending the next | |
100 | * packet. If the STA went to power save mode, this will happen | |
101 | * when it wakes up for the next time. | |
102 | */ | |
c2c98fde | 103 | set_sta_flag(sta, WLAN_STA_CLEAR_PS_FILT); |
fe7a5d5c JB |
104 | |
105 | /* | |
106 | * This code races in the following way: | |
107 | * | |
108 | * (1) STA sends frame indicating it will go to sleep and does so | |
109 | * (2) hardware/firmware adds STA to filter list, passes frame up | |
110 | * (3) hardware/firmware processes TX fifo and suppresses a frame | |
111 | * (4) we get TX status before having processed the frame and | |
112 | * knowing that the STA has gone to sleep. | |
113 | * | |
114 | * This is actually quite unlikely even when both those events are | |
115 | * processed from interrupts coming in quickly after one another or | |
116 | * even at the same time because we queue both TX status events and | |
117 | * RX frames to be processed by a tasklet and process them in the | |
118 | * same order that they were received or TX status last. Hence, there | |
119 | * is no race as long as the frame RX is processed before the next TX | |
120 | * status, which drivers can ensure, see below. | |
121 | * | |
122 | * Note that this can only happen if the hardware or firmware can | |
123 | * actually add STAs to the filter list, if this is done by the | |
124 | * driver in response to set_tim() (which will only reduce the race | |
125 | * this whole filtering tries to solve, not completely solve it) | |
126 | * this situation cannot happen. | |
127 | * | |
128 | * To completely solve this race drivers need to make sure that they | |
129 | * (a) don't mix the irq-safe/not irq-safe TX status/RX processing | |
130 | * functions and | |
131 | * (b) always process RX events before TX status events if ordering | |
132 | * can be unknown, for example with different interrupt status | |
133 | * bits. | |
d057e5a3 AN |
134 | * (c) if PS mode transitions are manual (i.e. the flag |
135 | * %IEEE80211_HW_AP_LINK_PS is set), always process PS state | |
136 | * changes before calling TX status events if ordering can be | |
137 | * unknown. | |
fe7a5d5c | 138 | */ |
c2c98fde | 139 | if (test_sta_flag(sta, WLAN_STA_PS_STA) && |
948d887d JB |
140 | skb_queue_len(&sta->tx_filtered[ac]) < STA_MAX_TX_BUFFER) { |
141 | skb_queue_tail(&sta->tx_filtered[ac], skb); | |
c868cb35 | 142 | sta_info_recalc_tim(sta); |
60750397 JB |
143 | |
144 | if (!timer_pending(&local->sta_cleanup)) | |
145 | mod_timer(&local->sta_cleanup, | |
146 | round_jiffies(jiffies + | |
147 | STA_INFO_CLEANUP_INTERVAL)); | |
fe7a5d5c JB |
148 | return; |
149 | } | |
150 | ||
c2c98fde | 151 | if (!test_sta_flag(sta, WLAN_STA_PS_STA) && |
fe7a5d5c JB |
152 | !(info->flags & IEEE80211_TX_INTFL_RETRIED)) { |
153 | /* Software retry the packet once */ | |
154 | info->flags |= IEEE80211_TX_INTFL_RETRIED; | |
155 | ieee80211_add_pending_skb(local, skb); | |
156 | return; | |
157 | } | |
158 | ||
bdcbd8e0 JB |
159 | ps_dbg_ratelimited(sta->sdata, |
160 | "dropped TX filtered frame, queue_len=%d PS=%d @%lu\n", | |
161 | skb_queue_len(&sta->tx_filtered[ac]), | |
162 | !!test_sta_flag(sta, WLAN_STA_PS_STA), jiffies); | |
c3e7724b | 163 | ieee80211_free_txskb(&local->hw, skb); |
fe7a5d5c JB |
164 | } |
165 | ||
f0425bed FF |
166 | static void ieee80211_check_pending_bar(struct sta_info *sta, u8 *addr, u8 tid) |
167 | { | |
168 | struct tid_ampdu_tx *tid_tx; | |
169 | ||
170 | tid_tx = rcu_dereference(sta->ampdu_mlme.tid_tx[tid]); | |
171 | if (!tid_tx || !tid_tx->bar_pending) | |
172 | return; | |
173 | ||
174 | tid_tx->bar_pending = false; | |
8c771244 | 175 | ieee80211_send_bar(&sta->sdata->vif, addr, tid, tid_tx->failed_bar_ssn); |
f0425bed FF |
176 | } |
177 | ||
0f78231b JB |
178 | static void ieee80211_frame_acked(struct sta_info *sta, struct sk_buff *skb) |
179 | { | |
180 | struct ieee80211_mgmt *mgmt = (void *) skb->data; | |
181 | struct ieee80211_local *local = sta->local; | |
182 | struct ieee80211_sub_if_data *sdata = sta->sdata; | |
183 | ||
30686bf7 | 184 | if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) |
0c5b9329 FF |
185 | sta->last_rx = jiffies; |
186 | ||
f0425bed FF |
187 | if (ieee80211_is_data_qos(mgmt->frame_control)) { |
188 | struct ieee80211_hdr *hdr = (void *) skb->data; | |
189 | u8 *qc = ieee80211_get_qos_ctl(hdr); | |
190 | u16 tid = qc[0] & 0xf; | |
191 | ||
192 | ieee80211_check_pending_bar(sta, hdr->addr1, tid); | |
193 | } | |
194 | ||
0f78231b | 195 | if (ieee80211_is_action(mgmt->frame_control) && |
0f78231b | 196 | mgmt->u.action.category == WLAN_CATEGORY_HT && |
04ecd257 | 197 | mgmt->u.action.u.ht_smps.action == WLAN_HT_ACTION_SMPS && |
04ecd257 | 198 | ieee80211_sdata_running(sdata)) { |
687da132 EG |
199 | enum ieee80211_smps_mode smps_mode; |
200 | ||
0f78231b JB |
201 | switch (mgmt->u.action.u.ht_smps.smps_control) { |
202 | case WLAN_HT_SMPS_CONTROL_DYNAMIC: | |
687da132 | 203 | smps_mode = IEEE80211_SMPS_DYNAMIC; |
0f78231b JB |
204 | break; |
205 | case WLAN_HT_SMPS_CONTROL_STATIC: | |
687da132 | 206 | smps_mode = IEEE80211_SMPS_STATIC; |
0f78231b JB |
207 | break; |
208 | case WLAN_HT_SMPS_CONTROL_DISABLED: | |
209 | default: /* shouldn't happen since we don't send that */ | |
687da132 | 210 | smps_mode = IEEE80211_SMPS_OFF; |
0f78231b JB |
211 | break; |
212 | } | |
213 | ||
687da132 EG |
214 | if (sdata->vif.type == NL80211_IFTYPE_STATION) { |
215 | /* | |
216 | * This update looks racy, but isn't -- if we come | |
217 | * here we've definitely got a station that we're | |
218 | * talking to, and on a managed interface that can | |
219 | * only be the AP. And the only other place updating | |
220 | * this variable in managed mode is before association. | |
221 | */ | |
222 | sdata->smps_mode = smps_mode; | |
223 | ieee80211_queue_work(&local->hw, &sdata->recalc_smps); | |
224 | } else if (sdata->vif.type == NL80211_IFTYPE_AP || | |
225 | sdata->vif.type == NL80211_IFTYPE_AP_VLAN) { | |
226 | sta->known_smps_mode = smps_mode; | |
227 | } | |
0f78231b JB |
228 | } |
229 | } | |
230 | ||
f0425bed FF |
231 | static void ieee80211_set_bar_pending(struct sta_info *sta, u8 tid, u16 ssn) |
232 | { | |
233 | struct tid_ampdu_tx *tid_tx; | |
234 | ||
235 | tid_tx = rcu_dereference(sta->ampdu_mlme.tid_tx[tid]); | |
236 | if (!tid_tx) | |
237 | return; | |
238 | ||
239 | tid_tx->failed_bar_ssn = ssn; | |
240 | tid_tx->bar_pending = true; | |
241 | } | |
242 | ||
a2fe8166 HS |
243 | static int ieee80211_tx_radiotap_len(struct ieee80211_tx_info *info) |
244 | { | |
245 | int len = sizeof(struct ieee80211_radiotap_header); | |
246 | ||
247 | /* IEEE80211_RADIOTAP_RATE rate */ | |
248 | if (info->status.rates[0].idx >= 0 && | |
a8241310 KB |
249 | !(info->status.rates[0].flags & (IEEE80211_TX_RC_MCS | |
250 | IEEE80211_TX_RC_VHT_MCS))) | |
a2fe8166 HS |
251 | len += 2; |
252 | ||
253 | /* IEEE80211_RADIOTAP_TX_FLAGS */ | |
254 | len += 2; | |
255 | ||
256 | /* IEEE80211_RADIOTAP_DATA_RETRIES */ | |
257 | len += 1; | |
258 | ||
a8241310 KB |
259 | /* IEEE80211_RADIOTAP_MCS |
260 | * IEEE80211_RADIOTAP_VHT */ | |
261 | if (info->status.rates[0].idx >= 0) { | |
262 | if (info->status.rates[0].flags & IEEE80211_TX_RC_MCS) | |
263 | len += 3; | |
264 | else if (info->status.rates[0].flags & IEEE80211_TX_RC_VHT_MCS) | |
265 | len = ALIGN(len, 2) + 12; | |
266 | } | |
7f2a5e21 | 267 | |
a2fe8166 HS |
268 | return len; |
269 | } | |
270 | ||
2103dec1 | 271 | static void |
a8241310 KB |
272 | ieee80211_add_tx_radiotap_header(struct ieee80211_local *local, |
273 | struct ieee80211_supported_band *sband, | |
2103dec1 SW |
274 | struct sk_buff *skb, int retry_count, |
275 | int rtap_len, int shift) | |
a2fe8166 HS |
276 | { |
277 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); | |
278 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data; | |
279 | struct ieee80211_radiotap_header *rthdr; | |
280 | unsigned char *pos; | |
9c8f2c42 | 281 | u16 txflags; |
a2fe8166 HS |
282 | |
283 | rthdr = (struct ieee80211_radiotap_header *) skb_push(skb, rtap_len); | |
284 | ||
285 | memset(rthdr, 0, rtap_len); | |
286 | rthdr->it_len = cpu_to_le16(rtap_len); | |
287 | rthdr->it_present = | |
288 | cpu_to_le32((1 << IEEE80211_RADIOTAP_TX_FLAGS) | | |
289 | (1 << IEEE80211_RADIOTAP_DATA_RETRIES)); | |
290 | pos = (unsigned char *)(rthdr + 1); | |
291 | ||
292 | /* | |
293 | * XXX: Once radiotap gets the bitmap reset thing the vendor | |
294 | * extensions proposal contains, we can actually report | |
295 | * the whole set of tries we did. | |
296 | */ | |
297 | ||
298 | /* IEEE80211_RADIOTAP_RATE */ | |
299 | if (info->status.rates[0].idx >= 0 && | |
a8241310 KB |
300 | !(info->status.rates[0].flags & (IEEE80211_TX_RC_MCS | |
301 | IEEE80211_TX_RC_VHT_MCS))) { | |
2103dec1 SW |
302 | u16 rate; |
303 | ||
a2fe8166 | 304 | rthdr->it_present |= cpu_to_le32(1 << IEEE80211_RADIOTAP_RATE); |
2103dec1 SW |
305 | rate = sband->bitrates[info->status.rates[0].idx].bitrate; |
306 | *pos = DIV_ROUND_UP(rate, 5 * (1 << shift)); | |
a2fe8166 HS |
307 | /* padding for tx flags */ |
308 | pos += 2; | |
309 | } | |
310 | ||
311 | /* IEEE80211_RADIOTAP_TX_FLAGS */ | |
312 | txflags = 0; | |
313 | if (!(info->flags & IEEE80211_TX_STAT_ACK) && | |
314 | !is_multicast_ether_addr(hdr->addr1)) | |
9c8f2c42 | 315 | txflags |= IEEE80211_RADIOTAP_F_TX_FAIL; |
a2fe8166 | 316 | |
311ab8e1 | 317 | if (info->status.rates[0].flags & IEEE80211_TX_RC_USE_CTS_PROTECT) |
9c8f2c42 | 318 | txflags |= IEEE80211_RADIOTAP_F_TX_CTS; |
311ab8e1 | 319 | if (info->status.rates[0].flags & IEEE80211_TX_RC_USE_RTS_CTS) |
9c8f2c42 | 320 | txflags |= IEEE80211_RADIOTAP_F_TX_RTS; |
a2fe8166 HS |
321 | |
322 | put_unaligned_le16(txflags, pos); | |
323 | pos += 2; | |
324 | ||
325 | /* IEEE80211_RADIOTAP_DATA_RETRIES */ | |
326 | /* for now report the total retry_count */ | |
327 | *pos = retry_count; | |
328 | pos++; | |
7f2a5e21 | 329 | |
a8241310 KB |
330 | if (info->status.rates[0].idx < 0) |
331 | return; | |
332 | ||
333 | /* IEEE80211_RADIOTAP_MCS | |
334 | * IEEE80211_RADIOTAP_VHT */ | |
335 | if (info->status.rates[0].flags & IEEE80211_TX_RC_MCS) { | |
7f2a5e21 HS |
336 | rthdr->it_present |= cpu_to_le32(1 << IEEE80211_RADIOTAP_MCS); |
337 | pos[0] = IEEE80211_RADIOTAP_MCS_HAVE_MCS | | |
338 | IEEE80211_RADIOTAP_MCS_HAVE_GI | | |
339 | IEEE80211_RADIOTAP_MCS_HAVE_BW; | |
340 | if (info->status.rates[0].flags & IEEE80211_TX_RC_SHORT_GI) | |
341 | pos[1] |= IEEE80211_RADIOTAP_MCS_SGI; | |
342 | if (info->status.rates[0].flags & IEEE80211_TX_RC_40_MHZ_WIDTH) | |
343 | pos[1] |= IEEE80211_RADIOTAP_MCS_BW_40; | |
344 | if (info->status.rates[0].flags & IEEE80211_TX_RC_GREEN_FIELD) | |
345 | pos[1] |= IEEE80211_RADIOTAP_MCS_FMT_GF; | |
346 | pos[2] = info->status.rates[0].idx; | |
347 | pos += 3; | |
a8241310 KB |
348 | } else if (info->status.rates[0].flags & IEEE80211_TX_RC_VHT_MCS) { |
349 | u16 known = local->hw.radiotap_vht_details & | |
350 | (IEEE80211_RADIOTAP_VHT_KNOWN_GI | | |
351 | IEEE80211_RADIOTAP_VHT_KNOWN_BANDWIDTH); | |
352 | ||
353 | rthdr->it_present |= cpu_to_le32(1 << IEEE80211_RADIOTAP_VHT); | |
354 | ||
355 | /* required alignment from rthdr */ | |
356 | pos = (u8 *)rthdr + ALIGN(pos - (u8 *)rthdr, 2); | |
7f2a5e21 | 357 | |
a8241310 KB |
358 | /* u16 known - IEEE80211_RADIOTAP_VHT_KNOWN_* */ |
359 | put_unaligned_le16(known, pos); | |
360 | pos += 2; | |
361 | ||
362 | /* u8 flags - IEEE80211_RADIOTAP_VHT_FLAG_* */ | |
363 | if (info->status.rates[0].flags & IEEE80211_TX_RC_SHORT_GI) | |
364 | *pos |= IEEE80211_RADIOTAP_VHT_FLAG_SGI; | |
365 | pos++; | |
366 | ||
367 | /* u8 bandwidth */ | |
368 | if (info->status.rates[0].flags & IEEE80211_TX_RC_40_MHZ_WIDTH) | |
369 | *pos = 1; | |
370 | else if (info->status.rates[0].flags & IEEE80211_TX_RC_80_MHZ_WIDTH) | |
371 | *pos = 4; | |
372 | else if (info->status.rates[0].flags & IEEE80211_TX_RC_160_MHZ_WIDTH) | |
373 | *pos = 11; | |
374 | else /* IEEE80211_TX_RC_{20_MHZ_WIDTH,FIXME:DUP_DATA} */ | |
375 | *pos = 0; | |
376 | pos++; | |
377 | ||
378 | /* u8 mcs_nss[4] */ | |
379 | *pos = (ieee80211_rate_get_vht_mcs(&info->status.rates[0]) << 4) | | |
380 | ieee80211_rate_get_vht_nss(&info->status.rates[0]); | |
381 | pos += 4; | |
382 | ||
383 | /* u8 coding */ | |
384 | pos++; | |
385 | /* u8 group_id */ | |
386 | pos++; | |
387 | /* u16 partial_aid */ | |
388 | pos += 2; | |
389 | } | |
a2fe8166 HS |
390 | } |
391 | ||
1277b4a9 LK |
392 | /* |
393 | * Handles the tx for TDLS teardown frames. | |
394 | * If the frame wasn't ACKed by the peer - it will be re-sent through the AP | |
395 | */ | |
396 | static void ieee80211_tdls_td_tx_handle(struct ieee80211_local *local, | |
397 | struct ieee80211_sub_if_data *sdata, | |
398 | struct sk_buff *skb, u32 flags) | |
399 | { | |
400 | struct sk_buff *teardown_skb; | |
401 | struct sk_buff *orig_teardown_skb; | |
402 | bool is_teardown = false; | |
403 | ||
404 | /* Get the teardown data we need and free the lock */ | |
405 | spin_lock(&sdata->u.mgd.teardown_lock); | |
406 | teardown_skb = sdata->u.mgd.teardown_skb; | |
407 | orig_teardown_skb = sdata->u.mgd.orig_teardown_skb; | |
408 | if ((skb == orig_teardown_skb) && teardown_skb) { | |
409 | sdata->u.mgd.teardown_skb = NULL; | |
410 | sdata->u.mgd.orig_teardown_skb = NULL; | |
411 | is_teardown = true; | |
412 | } | |
413 | spin_unlock(&sdata->u.mgd.teardown_lock); | |
414 | ||
415 | if (is_teardown) { | |
416 | /* This mechanism relies on being able to get ACKs */ | |
30686bf7 | 417 | WARN_ON(!ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)); |
1277b4a9 LK |
418 | |
419 | /* Check if peer has ACKed */ | |
420 | if (flags & IEEE80211_TX_STAT_ACK) { | |
421 | dev_kfree_skb_any(teardown_skb); | |
422 | } else { | |
423 | tdls_dbg(sdata, | |
424 | "TDLS Resending teardown through AP\n"); | |
425 | ||
426 | ieee80211_subif_start_xmit(teardown_skb, skb->dev); | |
427 | } | |
428 | } | |
429 | } | |
430 | ||
b2eb0ee6 JB |
431 | static struct ieee80211_sub_if_data * |
432 | ieee80211_sdata_from_skb(struct ieee80211_local *local, struct sk_buff *skb) | |
433 | { | |
434 | struct ieee80211_sub_if_data *sdata; | |
435 | ||
436 | if (skb->dev) { | |
437 | list_for_each_entry_rcu(sdata, &local->interfaces, list) { | |
438 | if (!sdata->dev) | |
439 | continue; | |
440 | ||
441 | if (skb->dev == sdata->dev) | |
442 | return sdata; | |
443 | } | |
444 | ||
445 | return NULL; | |
446 | } | |
447 | ||
448 | return rcu_dereference(local->p2p_sdata); | |
449 | } | |
450 | ||
451 | static void ieee80211_report_ack_skb(struct ieee80211_local *local, | |
452 | struct ieee80211_tx_info *info, | |
453 | bool acked, bool dropped) | |
454 | { | |
455 | struct sk_buff *skb; | |
456 | unsigned long flags; | |
457 | ||
458 | spin_lock_irqsave(&local->ack_status_lock, flags); | |
459 | skb = idr_find(&local->ack_status_frames, info->ack_frame_id); | |
460 | if (skb) | |
461 | idr_remove(&local->ack_status_frames, info->ack_frame_id); | |
462 | spin_unlock_irqrestore(&local->ack_status_lock, flags); | |
463 | ||
464 | if (!skb) | |
465 | return; | |
466 | ||
467 | if (dropped) { | |
468 | dev_kfree_skb_any(skb); | |
469 | return; | |
470 | } | |
471 | ||
472 | if (info->flags & IEEE80211_TX_INTFL_NL80211_FRAME_TX) { | |
3b79af97 | 473 | u64 cookie = IEEE80211_SKB_CB(skb)->ack.cookie; |
b2eb0ee6 | 474 | struct ieee80211_sub_if_data *sdata; |
3b79af97 | 475 | struct ieee80211_hdr *hdr = (void *)skb->data; |
b2eb0ee6 JB |
476 | |
477 | rcu_read_lock(); | |
478 | sdata = ieee80211_sdata_from_skb(local, skb); | |
3b79af97 JB |
479 | if (sdata) { |
480 | if (ieee80211_is_nullfunc(hdr->frame_control) || | |
481 | ieee80211_is_qos_nullfunc(hdr->frame_control)) | |
482 | cfg80211_probe_status(sdata->dev, hdr->addr1, | |
483 | cookie, acked, | |
484 | GFP_ATOMIC); | |
485 | else | |
486 | cfg80211_mgmt_tx_status(&sdata->wdev, cookie, | |
487 | skb->data, skb->len, | |
488 | acked, GFP_ATOMIC); | |
489 | } | |
b2eb0ee6 JB |
490 | rcu_read_unlock(); |
491 | ||
492 | dev_kfree_skb_any(skb); | |
493 | } else { | |
494 | /* consumes skb */ | |
495 | skb_complete_wifi_ack(skb, acked); | |
496 | } | |
497 | } | |
498 | ||
8a2fbedc JB |
499 | static void ieee80211_report_used_skb(struct ieee80211_local *local, |
500 | struct sk_buff *skb, bool dropped) | |
501 | { | |
502 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); | |
503 | struct ieee80211_hdr *hdr = (void *)skb->data; | |
504 | bool acked = info->flags & IEEE80211_TX_STAT_ACK; | |
505 | ||
506 | if (dropped) | |
507 | acked = false; | |
508 | ||
3b79af97 | 509 | if (info->flags & IEEE80211_TX_INTFL_MLME_CONN_TX) { |
b2eb0ee6 | 510 | struct ieee80211_sub_if_data *sdata; |
8a2fbedc JB |
511 | |
512 | rcu_read_lock(); | |
513 | ||
b2eb0ee6 | 514 | sdata = ieee80211_sdata_from_skb(local, skb); |
8a2fbedc | 515 | |
1672c0e3 | 516 | if (!sdata) { |
8a2fbedc | 517 | skb->dev = NULL; |
1672c0e3 | 518 | } else if (info->flags & IEEE80211_TX_INTFL_MLME_CONN_TX) { |
1277b4a9 LK |
519 | unsigned int hdr_size = |
520 | ieee80211_hdrlen(hdr->frame_control); | |
521 | ||
522 | /* Check to see if packet is a TDLS teardown packet */ | |
523 | if (ieee80211_is_data(hdr->frame_control) && | |
524 | (ieee80211_get_tdls_action(skb, hdr_size) == | |
525 | WLAN_TDLS_TEARDOWN)) | |
526 | ieee80211_tdls_td_tx_handle(local, sdata, skb, | |
527 | info->flags); | |
528 | else | |
529 | ieee80211_mgd_conn_tx_status(sdata, | |
530 | hdr->frame_control, | |
531 | acked); | |
8a2fbedc | 532 | } else { |
b2eb0ee6 JB |
533 | /* we assign ack frame ID for the others */ |
534 | WARN_ON(1); | |
8a2fbedc JB |
535 | } |
536 | ||
537 | rcu_read_unlock(); | |
b2eb0ee6 JB |
538 | } else if (info->ack_frame_id) { |
539 | ieee80211_report_ack_skb(local, info, acked, dropped); | |
8a2fbedc JB |
540 | } |
541 | } | |
542 | ||
99ba2a14 JB |
543 | /* |
544 | * Use a static threshold for now, best value to be determined | |
545 | * by testing ... | |
546 | * Should it depend on: | |
547 | * - on # of retransmissions | |
548 | * - current throughput (higher value for higher tpt)? | |
549 | */ | |
550 | #define STA_LOST_PKT_THRESHOLD 50 | |
9d58f25b LK |
551 | #define STA_LOST_TDLS_PKT_THRESHOLD 10 |
552 | #define STA_LOST_TDLS_PKT_TIME (10*HZ) /* 10secs since last ACK */ | |
99ba2a14 | 553 | |
ad9dda63 FF |
554 | static void ieee80211_lost_packet(struct sta_info *sta, |
555 | struct ieee80211_tx_info *info) | |
abd43a6a | 556 | { |
abd43a6a FF |
557 | /* This packet was aggregated but doesn't carry status info */ |
558 | if ((info->flags & IEEE80211_TX_CTL_AMPDU) && | |
559 | !(info->flags & IEEE80211_TX_STAT_AMPDU)) | |
560 | return; | |
561 | ||
9d58f25b LK |
562 | sta->lost_packets++; |
563 | if (!sta->sta.tdls && sta->lost_packets < STA_LOST_PKT_THRESHOLD) | |
564 | return; | |
565 | ||
566 | /* | |
567 | * If we're in TDLS mode, make sure that all STA_LOST_TDLS_PKT_THRESHOLD | |
568 | * of the last packets were lost, and that no ACK was received in the | |
569 | * last STA_LOST_TDLS_PKT_TIME ms, before triggering the CQM packet-loss | |
570 | * mechanism. | |
571 | */ | |
572 | if (sta->sta.tdls && | |
573 | (sta->lost_packets < STA_LOST_TDLS_PKT_THRESHOLD || | |
574 | time_before(jiffies, | |
575 | sta->last_tdls_pkt_time + STA_LOST_TDLS_PKT_TIME))) | |
abd43a6a FF |
576 | return; |
577 | ||
578 | cfg80211_cqm_pktloss_notify(sta->sdata->dev, sta->sta.addr, | |
579 | sta->lost_packets, GFP_ATOMIC); | |
580 | sta->lost_packets = 0; | |
581 | } | |
582 | ||
7e1cdcbb FF |
583 | static int ieee80211_tx_get_rates(struct ieee80211_hw *hw, |
584 | struct ieee80211_tx_info *info, | |
585 | int *retry_count) | |
fe7a5d5c | 586 | { |
0c869808 | 587 | int rates_idx = -1; |
7e1cdcbb FF |
588 | int count = -1; |
589 | int i; | |
fe7a5d5c JB |
590 | |
591 | for (i = 0; i < IEEE80211_TX_MAX_RATES; i++) { | |
d01b3160 LB |
592 | if ((info->flags & IEEE80211_TX_CTL_AMPDU) && |
593 | !(info->flags & IEEE80211_TX_STAT_AMPDU)) { | |
594 | /* just the first aggr frame carry status info */ | |
595 | info->status.rates[i].idx = -1; | |
596 | info->status.rates[i].count = 0; | |
597 | break; | |
598 | } else if (info->status.rates[i].idx < 0) { | |
be7974aa HS |
599 | break; |
600 | } else if (i >= hw->max_report_rates) { | |
601 | /* the HW cannot have attempted that rate */ | |
fe7a5d5c JB |
602 | info->status.rates[i].idx = -1; |
603 | info->status.rates[i].count = 0; | |
be7974aa | 604 | break; |
fe7a5d5c JB |
605 | } |
606 | ||
7e1cdcbb | 607 | count += info->status.rates[i].count; |
fe7a5d5c | 608 | } |
be7974aa HS |
609 | rates_idx = i - 1; |
610 | ||
7e1cdcbb FF |
611 | if (count < 0) |
612 | count = 0; | |
613 | ||
614 | *retry_count = count; | |
615 | return rates_idx; | |
616 | } | |
617 | ||
f027c2ac FF |
618 | void ieee80211_tx_status_noskb(struct ieee80211_hw *hw, |
619 | struct ieee80211_sta *pubsta, | |
620 | struct ieee80211_tx_info *info) | |
621 | { | |
622 | struct ieee80211_local *local = hw_to_local(hw); | |
623 | struct ieee80211_supported_band *sband; | |
624 | int retry_count; | |
625 | int rates_idx; | |
5cf16616 | 626 | bool acked, noack_success; |
f027c2ac FF |
627 | |
628 | rates_idx = ieee80211_tx_get_rates(hw, info, &retry_count); | |
629 | ||
630 | sband = hw->wiphy->bands[info->band]; | |
631 | ||
632 | acked = !!(info->flags & IEEE80211_TX_STAT_ACK); | |
5cf16616 SM |
633 | noack_success = !!(info->flags & IEEE80211_TX_STAT_NOACK_TRANSMITTED); |
634 | ||
f027c2ac FF |
635 | if (pubsta) { |
636 | struct sta_info *sta; | |
637 | ||
638 | sta = container_of(pubsta, struct sta_info, sta); | |
639 | ||
640 | if (!acked) | |
641 | sta->tx_retry_failed++; | |
642 | sta->tx_retry_count += retry_count; | |
643 | ||
644 | if (acked) { | |
645 | sta->last_rx = jiffies; | |
646 | ||
647 | if (sta->lost_packets) | |
648 | sta->lost_packets = 0; | |
649 | ||
650 | /* Track when last TDLS packet was ACKed */ | |
651 | if (test_sta_flag(sta, WLAN_STA_TDLS_PEER_AUTH)) | |
652 | sta->last_tdls_pkt_time = jiffies; | |
653 | } else { | |
654 | ieee80211_lost_packet(sta, info); | |
655 | } | |
656 | ||
657 | rate_control_tx_status_noskb(local, sband, sta, info); | |
658 | } | |
659 | ||
5cf16616 | 660 | if (acked || noack_success) { |
c206ca67 JB |
661 | I802_DEBUG_INC(local->dot11TransmittedFrameCount); |
662 | if (!pubsta) | |
663 | I802_DEBUG_INC(local->dot11MulticastTransmittedFrameCount); | |
664 | if (retry_count > 0) | |
665 | I802_DEBUG_INC(local->dot11RetryCount); | |
666 | if (retry_count > 1) | |
667 | I802_DEBUG_INC(local->dot11MultipleRetryCount); | |
f027c2ac | 668 | } else { |
c206ca67 | 669 | I802_DEBUG_INC(local->dot11FailedCount); |
f027c2ac FF |
670 | } |
671 | } | |
672 | EXPORT_SYMBOL(ieee80211_tx_status_noskb); | |
673 | ||
7e1cdcbb FF |
674 | void ieee80211_tx_status(struct ieee80211_hw *hw, struct sk_buff *skb) |
675 | { | |
676 | struct sk_buff *skb2; | |
677 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data; | |
678 | struct ieee80211_local *local = hw_to_local(hw); | |
679 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); | |
680 | __le16 fc; | |
681 | struct ieee80211_supported_band *sband; | |
682 | struct ieee80211_sub_if_data *sdata; | |
683 | struct net_device *prev_dev = NULL; | |
7bedd0cf JB |
684 | struct sta_info *sta; |
685 | struct rhash_head *tmp; | |
7e1cdcbb FF |
686 | int retry_count; |
687 | int rates_idx; | |
688 | bool send_to_cooked; | |
689 | bool acked; | |
690 | struct ieee80211_bar *bar; | |
691 | int rtap_len; | |
692 | int shift = 0; | |
5e06a9e8 | 693 | int tid = IEEE80211_NUM_TIDS; |
7bedd0cf | 694 | const struct bucket_table *tbl; |
7e1cdcbb FF |
695 | |
696 | rates_idx = ieee80211_tx_get_rates(hw, info, &retry_count); | |
fe7a5d5c JB |
697 | |
698 | rcu_read_lock(); | |
699 | ||
700 | sband = local->hw.wiphy->bands[info->band]; | |
375177bf | 701 | fc = hdr->frame_control; |
fe7a5d5c | 702 | |
7bedd0cf JB |
703 | tbl = rht_dereference_rcu(local->sta_hash.tbl, &local->sta_hash); |
704 | ||
705 | for_each_sta_info(local, tbl, hdr->addr1, sta, tmp) { | |
abe60632 | 706 | /* skip wrong virtual interface */ |
b203ca39 | 707 | if (!ether_addr_equal(hdr->addr2, sta->sdata->vif.addr)) |
abe60632 | 708 | continue; |
fe7a5d5c | 709 | |
2103dec1 SW |
710 | shift = ieee80211_vif_get_shift(&sta->sdata->vif); |
711 | ||
47086fc5 | 712 | if (info->flags & IEEE80211_TX_STATUS_EOSP) |
c2c98fde | 713 | clear_sta_flag(sta, WLAN_STA_SP); |
47086fc5 | 714 | |
04ac3c0e | 715 | acked = !!(info->flags & IEEE80211_TX_STAT_ACK); |
c2c98fde | 716 | if (!acked && test_sta_flag(sta, WLAN_STA_PS_STA)) { |
fe7a5d5c JB |
717 | /* |
718 | * The STA is in power save mode, so assume | |
719 | * that this TX packet failed because of that. | |
720 | */ | |
721 | ieee80211_handle_filtered_frame(local, sta, skb); | |
722 | rcu_read_unlock(); | |
723 | return; | |
724 | } | |
725 | ||
3f52b7e3 MP |
726 | /* mesh Peer Service Period support */ |
727 | if (ieee80211_vif_is_mesh(&sta->sdata->vif) && | |
728 | ieee80211_is_data_qos(fc)) | |
729 | ieee80211_mpsp_trigger_process( | |
730 | ieee80211_get_qos_ctl(hdr), | |
731 | sta, true, acked); | |
732 | ||
30686bf7 | 733 | if (ieee80211_hw_check(&local->hw, HAS_RATE_CONTROL) && |
00a9a6d1 | 734 | (ieee80211_is_data(hdr->frame_control)) && |
0c869808 JO |
735 | (rates_idx != -1)) |
736 | sta->last_tx_rate = info->status.rates[rates_idx]; | |
737 | ||
fe7a5d5c JB |
738 | if ((info->flags & IEEE80211_TX_STAT_AMPDU_NO_BACK) && |
739 | (ieee80211_is_data_qos(fc))) { | |
79c892b8 | 740 | u16 ssn; |
fe7a5d5c JB |
741 | u8 *qc; |
742 | ||
743 | qc = ieee80211_get_qos_ctl(hdr); | |
744 | tid = qc[0] & 0xf; | |
745 | ssn = ((le16_to_cpu(hdr->seq_ctrl) + 0x10) | |
746 | & IEEE80211_SCTL_SEQ); | |
8c771244 | 747 | ieee80211_send_bar(&sta->sdata->vif, hdr->addr1, |
fe7a5d5c | 748 | tid, ssn); |
79c892b8 JB |
749 | } else if (ieee80211_is_data_qos(fc)) { |
750 | u8 *qc = ieee80211_get_qos_ctl(hdr); | |
751 | ||
752 | tid = qc[0] & 0xf; | |
fe7a5d5c JB |
753 | } |
754 | ||
e69deded | 755 | if (!acked && ieee80211_is_back_req(fc)) { |
79c892b8 | 756 | u16 control; |
7107676a | 757 | |
e69deded | 758 | /* |
7107676a FF |
759 | * BAR failed, store the last SSN and retry sending |
760 | * the BAR when the next unicast transmission on the | |
761 | * same TID succeeds. | |
e69deded HS |
762 | */ |
763 | bar = (struct ieee80211_bar *) skb->data; | |
7107676a FF |
764 | control = le16_to_cpu(bar->control); |
765 | if (!(control & IEEE80211_BAR_CTRL_MULTI_TID)) { | |
f0425bed FF |
766 | u16 ssn = le16_to_cpu(bar->start_seq_num); |
767 | ||
7107676a | 768 | tid = (control & |
e69deded HS |
769 | IEEE80211_BAR_CTRL_TID_INFO_MASK) >> |
770 | IEEE80211_BAR_CTRL_TID_INFO_SHIFT; | |
f0425bed | 771 | |
8df6b7b1 | 772 | ieee80211_set_bar_pending(sta, tid, ssn); |
e69deded HS |
773 | } |
774 | } | |
775 | ||
fe7a5d5c JB |
776 | if (info->flags & IEEE80211_TX_STAT_TX_FILTERED) { |
777 | ieee80211_handle_filtered_frame(local, sta, skb); | |
778 | rcu_read_unlock(); | |
779 | return; | |
780 | } else { | |
04ac3c0e | 781 | if (!acked) |
fe7a5d5c JB |
782 | sta->tx_retry_failed++; |
783 | sta->tx_retry_count += retry_count; | |
79c892b8 JB |
784 | |
785 | if (ieee80211_is_data_present(fc)) { | |
786 | if (!acked) | |
787 | sta->tx_msdu_failed[tid]++; | |
788 | sta->tx_msdu_retries[tid] += retry_count; | |
789 | } | |
fe7a5d5c JB |
790 | } |
791 | ||
792 | rate_control_tx_status(local, sband, sta, skb); | |
793 | if (ieee80211_vif_is_mesh(&sta->sdata->vif)) | |
794 | ieee80211s_update_metric(local, sta, skb); | |
0f78231b | 795 | |
04ac3c0e | 796 | if (!(info->flags & IEEE80211_TX_CTL_INJECTED) && acked) |
0f78231b | 797 | ieee80211_frame_acked(sta, skb); |
99ba2a14 | 798 | |
04ac3c0e | 799 | if ((sta->sdata->vif.type == NL80211_IFTYPE_STATION) && |
30686bf7 | 800 | ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) |
02219b3a JB |
801 | ieee80211_sta_tx_notify(sta->sdata, (void *) skb->data, |
802 | acked, info->status.tx_time); | |
04ac3c0e | 803 | |
30686bf7 | 804 | if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) { |
99ba2a14 JB |
805 | if (info->flags & IEEE80211_TX_STAT_ACK) { |
806 | if (sta->lost_packets) | |
807 | sta->lost_packets = 0; | |
9d58f25b LK |
808 | |
809 | /* Track when last TDLS packet was ACKed */ | |
810 | if (test_sta_flag(sta, WLAN_STA_TDLS_PEER_AUTH)) | |
811 | sta->last_tdls_pkt_time = jiffies; | |
abd43a6a | 812 | } else { |
ad9dda63 | 813 | ieee80211_lost_packet(sta, info); |
99ba2a14 JB |
814 | } |
815 | } | |
db94357d S |
816 | |
817 | if (acked) | |
818 | sta->last_ack_signal = info->status.ack_signal; | |
fe7a5d5c JB |
819 | } |
820 | ||
821 | rcu_read_unlock(); | |
822 | ||
e47f2509 | 823 | ieee80211_led_tx(local); |
fe7a5d5c JB |
824 | |
825 | /* SNMP counters | |
826 | * Fragments are passed to low-level drivers as separate skbs, so these | |
827 | * are actually fragments, not frames. Update frame counters only for | |
828 | * the first fragment of the frame. */ | |
5cf16616 SM |
829 | if ((info->flags & IEEE80211_TX_STAT_ACK) || |
830 | (info->flags & IEEE80211_TX_STAT_NOACK_TRANSMITTED)) { | |
adf5ace5 | 831 | if (ieee80211_is_first_frag(hdr->seq_ctrl)) { |
c206ca67 | 832 | I802_DEBUG_INC(local->dot11TransmittedFrameCount); |
85b89af0 | 833 | if (is_multicast_ether_addr(ieee80211_get_DA(hdr))) |
c206ca67 | 834 | I802_DEBUG_INC(local->dot11MulticastTransmittedFrameCount); |
fe7a5d5c | 835 | if (retry_count > 0) |
c206ca67 | 836 | I802_DEBUG_INC(local->dot11RetryCount); |
fe7a5d5c | 837 | if (retry_count > 1) |
c206ca67 | 838 | I802_DEBUG_INC(local->dot11MultipleRetryCount); |
fe7a5d5c JB |
839 | } |
840 | ||
841 | /* This counter shall be incremented for an acknowledged MPDU | |
842 | * with an individual address in the address 1 field or an MPDU | |
843 | * with a multicast address in the address 1 field of type Data | |
844 | * or Management. */ | |
845 | if (!is_multicast_ether_addr(hdr->addr1) || | |
adf5ace5 HS |
846 | ieee80211_is_data(fc) || |
847 | ieee80211_is_mgmt(fc)) | |
c206ca67 | 848 | I802_DEBUG_INC(local->dot11TransmittedFragmentCount); |
fe7a5d5c | 849 | } else { |
adf5ace5 | 850 | if (ieee80211_is_first_frag(hdr->seq_ctrl)) |
c206ca67 | 851 | I802_DEBUG_INC(local->dot11FailedCount); |
fe7a5d5c JB |
852 | } |
853 | ||
375177bf | 854 | if (ieee80211_is_nullfunc(fc) && ieee80211_has_pm(fc) && |
30686bf7 | 855 | ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS) && |
375177bf VN |
856 | !(info->flags & IEEE80211_TX_CTL_INJECTED) && |
857 | local->ps_sdata && !(local->scanning)) { | |
858 | if (info->flags & IEEE80211_TX_STAT_ACK) { | |
859 | local->ps_sdata->u.mgd.flags |= | |
860 | IEEE80211_STA_NULLFUNC_ACKED; | |
375177bf VN |
861 | } else |
862 | mod_timer(&local->dynamic_ps_timer, jiffies + | |
863 | msecs_to_jiffies(10)); | |
864 | } | |
865 | ||
8a2fbedc | 866 | ieee80211_report_used_skb(local, skb, false); |
a729cff8 | 867 | |
fe7a5d5c JB |
868 | /* this was a transmitted frame, but now we want to reuse it */ |
869 | skb_orphan(skb); | |
870 | ||
eaf55530 FF |
871 | /* Need to make a copy before skb->cb gets cleared */ |
872 | send_to_cooked = !!(info->flags & IEEE80211_TX_CTL_INJECTED) || | |
adf5ace5 | 873 | !(ieee80211_is_data(fc)); |
eaf55530 | 874 | |
fe7a5d5c JB |
875 | /* |
876 | * This is a bit racy but we can avoid a lot of work | |
877 | * with this test... | |
878 | */ | |
eaf55530 | 879 | if (!local->monitors && (!send_to_cooked || !local->cooked_mntrs)) { |
fe7a5d5c JB |
880 | dev_kfree_skb(skb); |
881 | return; | |
882 | } | |
883 | ||
884 | /* send frame to monitor interfaces now */ | |
a2fe8166 HS |
885 | rtap_len = ieee80211_tx_radiotap_len(info); |
886 | if (WARN_ON_ONCE(skb_headroom(skb) < rtap_len)) { | |
f0d23208 | 887 | pr_err("ieee80211_tx_status: headroom too small\n"); |
fe7a5d5c JB |
888 | dev_kfree_skb(skb); |
889 | return; | |
890 | } | |
a8241310 KB |
891 | ieee80211_add_tx_radiotap_header(local, sband, skb, retry_count, |
892 | rtap_len, shift); | |
fe7a5d5c JB |
893 | |
894 | /* XXX: is this sufficient for BPF? */ | |
895 | skb_set_mac_header(skb, 0); | |
896 | skb->ip_summed = CHECKSUM_UNNECESSARY; | |
897 | skb->pkt_type = PACKET_OTHERHOST; | |
898 | skb->protocol = htons(ETH_P_802_2); | |
899 | memset(skb->cb, 0, sizeof(skb->cb)); | |
900 | ||
901 | rcu_read_lock(); | |
902 | list_for_each_entry_rcu(sdata, &local->interfaces, list) { | |
903 | if (sdata->vif.type == NL80211_IFTYPE_MONITOR) { | |
9607e6b6 | 904 | if (!ieee80211_sdata_running(sdata)) |
fe7a5d5c JB |
905 | continue; |
906 | ||
907 | if ((sdata->u.mntr_flags & MONITOR_FLAG_COOK_FRAMES) && | |
eaf55530 | 908 | !send_to_cooked) |
fe7a5d5c JB |
909 | continue; |
910 | ||
911 | if (prev_dev) { | |
912 | skb2 = skb_clone(skb, GFP_ATOMIC); | |
913 | if (skb2) { | |
914 | skb2->dev = prev_dev; | |
4efe7f51 | 915 | netif_rx(skb2); |
fe7a5d5c JB |
916 | } |
917 | } | |
918 | ||
919 | prev_dev = sdata->dev; | |
920 | } | |
921 | } | |
922 | if (prev_dev) { | |
923 | skb->dev = prev_dev; | |
4efe7f51 | 924 | netif_rx(skb); |
fe7a5d5c JB |
925 | skb = NULL; |
926 | } | |
927 | rcu_read_unlock(); | |
928 | dev_kfree_skb(skb); | |
929 | } | |
930 | EXPORT_SYMBOL(ieee80211_tx_status); | |
8178d38b AN |
931 | |
932 | void ieee80211_report_low_ack(struct ieee80211_sta *pubsta, u32 num_packets) | |
933 | { | |
934 | struct sta_info *sta = container_of(pubsta, struct sta_info, sta); | |
935 | cfg80211_cqm_pktloss_notify(sta->sdata->dev, sta->sta.addr, | |
936 | num_packets, GFP_ATOMIC); | |
937 | } | |
938 | EXPORT_SYMBOL(ieee80211_report_low_ack); | |
6096de7f JB |
939 | |
940 | void ieee80211_free_txskb(struct ieee80211_hw *hw, struct sk_buff *skb) | |
941 | { | |
a729cff8 | 942 | struct ieee80211_local *local = hw_to_local(hw); |
a729cff8 | 943 | |
8a2fbedc | 944 | ieee80211_report_used_skb(local, skb, true); |
6096de7f JB |
945 | dev_kfree_skb_any(skb); |
946 | } | |
947 | EXPORT_SYMBOL(ieee80211_free_txskb); | |
1f98ab7f FF |
948 | |
949 | void ieee80211_purge_tx_queue(struct ieee80211_hw *hw, | |
950 | struct sk_buff_head *skbs) | |
951 | { | |
952 | struct sk_buff *skb; | |
953 | ||
954 | while ((skb = __skb_dequeue(skbs))) | |
955 | ieee80211_free_txskb(hw, skb); | |
956 | } |