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d2912cb1 | 1 | // SPDX-License-Identifier: GPL-2.0-only |
e2ebc74d JB |
2 | /* |
3 | * Copyright 2002-2005, Instant802 Networks, Inc. | |
4 | * Copyright 2005-2006, Devicescape Software, Inc. | |
5 | * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz> | |
6 | * Copyright 2007 Johannes Berg <johannes@sipsolutions.net> | |
d98ad83e | 7 | * Copyright 2013-2014 Intel Mobile Communications GmbH |
73bc9e0a | 8 | * Copyright (C) 2018-2021 Intel Corporation |
e2ebc74d | 9 | * |
e2ebc74d JB |
10 | * Transmit and frame generation functions. |
11 | */ | |
12 | ||
13 | #include <linux/kernel.h> | |
14 | #include <linux/slab.h> | |
15 | #include <linux/skbuff.h> | |
ebceec86 | 16 | #include <linux/if_vlan.h> |
e2ebc74d JB |
17 | #include <linux/etherdevice.h> |
18 | #include <linux/bitmap.h> | |
d4e46a3d | 19 | #include <linux/rcupdate.h> |
bc3b2d7f | 20 | #include <linux/export.h> |
2433647b | 21 | #include <linux/timekeeping.h> |
881d966b | 22 | #include <net/net_namespace.h> |
e2ebc74d JB |
23 | #include <net/ieee80211_radiotap.h> |
24 | #include <net/cfg80211.h> | |
25 | #include <net/mac80211.h> | |
5caa328e MK |
26 | #include <net/codel.h> |
27 | #include <net/codel_impl.h> | |
e2ebc74d | 28 | #include <asm/unaligned.h> |
fa962b92 | 29 | #include <net/fq_impl.h> |
e2ebc74d JB |
30 | |
31 | #include "ieee80211_i.h" | |
24487981 | 32 | #include "driver-ops.h" |
2c8dccc7 | 33 | #include "led.h" |
33b64eb2 | 34 | #include "mesh.h" |
e2ebc74d JB |
35 | #include "wep.h" |
36 | #include "wpa.h" | |
37 | #include "wme.h" | |
2c8dccc7 | 38 | #include "rate.h" |
e2ebc74d | 39 | |
e2ebc74d JB |
40 | /* misc utils */ |
41 | ||
252b86c4 JB |
42 | static __le16 ieee80211_duration(struct ieee80211_tx_data *tx, |
43 | struct sk_buff *skb, int group_addr, | |
03f93c3d | 44 | int next_frag_len) |
e2ebc74d | 45 | { |
2103dec1 | 46 | int rate, mrate, erp, dur, i, shift = 0; |
2e92e6f2 | 47 | struct ieee80211_rate *txrate; |
e2ebc74d | 48 | struct ieee80211_local *local = tx->local; |
8318d78a | 49 | struct ieee80211_supported_band *sband; |
358c8d9d | 50 | struct ieee80211_hdr *hdr; |
252b86c4 | 51 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); |
2103dec1 SW |
52 | struct ieee80211_chanctx_conf *chanctx_conf; |
53 | u32 rate_flags = 0; | |
54 | ||
95cd470c FF |
55 | /* assume HW handles this */ |
56 | if (tx->rate.flags & (IEEE80211_TX_RC_MCS | IEEE80211_TX_RC_VHT_MCS)) | |
57 | return 0; | |
58 | ||
2103dec1 SW |
59 | rcu_read_lock(); |
60 | chanctx_conf = rcu_dereference(tx->sdata->vif.chanctx_conf); | |
61 | if (chanctx_conf) { | |
62 | shift = ieee80211_chandef_get_shift(&chanctx_conf->def); | |
63 | rate_flags = ieee80211_chandef_rate_flags(&chanctx_conf->def); | |
64 | } | |
65 | rcu_read_unlock(); | |
e6a9854b | 66 | |
e6a9854b | 67 | /* uh huh? */ |
0d528d85 | 68 | if (WARN_ON_ONCE(tx->rate.idx < 0)) |
e6a9854b | 69 | return 0; |
e2ebc74d | 70 | |
2d56577b | 71 | sband = local->hw.wiphy->bands[info->band]; |
0d528d85 | 72 | txrate = &sband->bitrates[tx->rate.idx]; |
8318d78a | 73 | |
e6a9854b | 74 | erp = txrate->flags & IEEE80211_RATE_ERP_G; |
e2ebc74d | 75 | |
89b8c02a TP |
76 | /* device is expected to do this */ |
77 | if (sband->band == NL80211_BAND_S1GHZ) | |
78 | return 0; | |
79 | ||
e2ebc74d JB |
80 | /* |
81 | * data and mgmt (except PS Poll): | |
82 | * - during CFP: 32768 | |
83 | * - during contention period: | |
84 | * if addr1 is group address: 0 | |
85 | * if more fragments = 0 and addr1 is individual address: time to | |
86 | * transmit one ACK plus SIFS | |
87 | * if more fragments = 1 and addr1 is individual address: time to | |
88 | * transmit next fragment plus 2 x ACK plus 3 x SIFS | |
89 | * | |
90 | * IEEE 802.11, 9.6: | |
91 | * - control response frame (CTS or ACK) shall be transmitted using the | |
92 | * same rate as the immediately previous frame in the frame exchange | |
93 | * sequence, if this rate belongs to the PHY mandatory rates, or else | |
94 | * at the highest possible rate belonging to the PHY rates in the | |
95 | * BSSBasicRateSet | |
96 | */ | |
252b86c4 | 97 | hdr = (struct ieee80211_hdr *)skb->data; |
358c8d9d | 98 | if (ieee80211_is_ctl(hdr->frame_control)) { |
e2ebc74d | 99 | /* TODO: These control frames are not currently sent by |
ccd7b362 | 100 | * mac80211, but should they be implemented, this function |
e2ebc74d JB |
101 | * needs to be updated to support duration field calculation. |
102 | * | |
103 | * RTS: time needed to transmit pending data/mgmt frame plus | |
104 | * one CTS frame plus one ACK frame plus 3 x SIFS | |
105 | * CTS: duration of immediately previous RTS minus time | |
106 | * required to transmit CTS and its SIFS | |
107 | * ACK: 0 if immediately previous directed data/mgmt had | |
108 | * more=0, with more=1 duration in ACK frame is duration | |
109 | * from previous frame minus time needed to transmit ACK | |
110 | * and its SIFS | |
111 | * PS Poll: BIT(15) | BIT(14) | aid | |
112 | */ | |
113 | return 0; | |
114 | } | |
115 | ||
116 | /* data/mgmt */ | |
117 | if (0 /* FIX: data/mgmt during CFP */) | |
03f93c3d | 118 | return cpu_to_le16(32768); |
e2ebc74d JB |
119 | |
120 | if (group_addr) /* Group address as the destination - no ACK */ | |
121 | return 0; | |
122 | ||
123 | /* Individual destination address: | |
124 | * IEEE 802.11, Ch. 9.6 (after IEEE 802.11g changes) | |
125 | * CTS and ACK frames shall be transmitted using the highest rate in | |
126 | * basic rate set that is less than or equal to the rate of the | |
127 | * immediately previous frame and that is using the same modulation | |
128 | * (CCK or OFDM). If no basic rate set matches with these requirements, | |
129 | * the highest mandatory rate of the PHY that is less than or equal to | |
130 | * the rate of the previous frame is used. | |
131 | * Mandatory rates for IEEE 802.11g PHY: 1, 2, 5.5, 11, 6, 12, 24 Mbps | |
132 | */ | |
133 | rate = -1; | |
8318d78a JB |
134 | /* use lowest available if everything fails */ |
135 | mrate = sband->bitrates[0].bitrate; | |
136 | for (i = 0; i < sband->n_bitrates; i++) { | |
137 | struct ieee80211_rate *r = &sband->bitrates[i]; | |
e2ebc74d | 138 | |
8318d78a JB |
139 | if (r->bitrate > txrate->bitrate) |
140 | break; | |
e2ebc74d | 141 | |
2103dec1 SW |
142 | if ((rate_flags & r->flags) != rate_flags) |
143 | continue; | |
144 | ||
bda3933a | 145 | if (tx->sdata->vif.bss_conf.basic_rates & BIT(i)) |
2103dec1 | 146 | rate = DIV_ROUND_UP(r->bitrate, 1 << shift); |
8318d78a JB |
147 | |
148 | switch (sband->band) { | |
63fa0426 SR |
149 | case NL80211_BAND_2GHZ: |
150 | case NL80211_BAND_LC: { | |
8318d78a JB |
151 | u32 flag; |
152 | if (tx->sdata->flags & IEEE80211_SDATA_OPERATING_GMODE) | |
153 | flag = IEEE80211_RATE_MANDATORY_G; | |
154 | else | |
155 | flag = IEEE80211_RATE_MANDATORY_B; | |
156 | if (r->flags & flag) | |
157 | mrate = r->bitrate; | |
158 | break; | |
159 | } | |
57fbcce3 | 160 | case NL80211_BAND_5GHZ: |
c5b9a7f8 | 161 | case NL80211_BAND_6GHZ: |
8318d78a JB |
162 | if (r->flags & IEEE80211_RATE_MANDATORY_A) |
163 | mrate = r->bitrate; | |
164 | break; | |
df78a0c0 | 165 | case NL80211_BAND_S1GHZ: |
57fbcce3 | 166 | case NL80211_BAND_60GHZ: |
3a0c52a6 | 167 | /* TODO, for now fall through */ |
57fbcce3 | 168 | case NUM_NL80211_BANDS: |
8318d78a JB |
169 | WARN_ON(1); |
170 | break; | |
171 | } | |
e2ebc74d JB |
172 | } |
173 | if (rate == -1) { | |
174 | /* No matching basic rate found; use highest suitable mandatory | |
175 | * PHY rate */ | |
2103dec1 | 176 | rate = DIV_ROUND_UP(mrate, 1 << shift); |
e2ebc74d JB |
177 | } |
178 | ||
6674f210 SW |
179 | /* Don't calculate ACKs for QoS Frames with NoAck Policy set */ |
180 | if (ieee80211_is_data_qos(hdr->frame_control) && | |
c26a0e10 | 181 | *(ieee80211_get_qos_ctl(hdr)) & IEEE80211_QOS_CTL_ACK_POLICY_NOACK) |
6674f210 SW |
182 | dur = 0; |
183 | else | |
184 | /* Time needed to transmit ACK | |
185 | * (10 bytes + 4-byte FCS = 112 bits) plus SIFS; rounded up | |
186 | * to closest integer */ | |
4ee73f33 | 187 | dur = ieee80211_frame_duration(sband->band, 10, rate, erp, |
438b61b7 SW |
188 | tx->sdata->vif.bss_conf.use_short_preamble, |
189 | shift); | |
e2ebc74d JB |
190 | |
191 | if (next_frag_len) { | |
192 | /* Frame is fragmented: duration increases with time needed to | |
193 | * transmit next fragment plus ACK and 2 x SIFS. */ | |
194 | dur *= 2; /* ACK + SIFS */ | |
195 | /* next fragment */ | |
4ee73f33 | 196 | dur += ieee80211_frame_duration(sband->band, next_frag_len, |
8318d78a | 197 | txrate->bitrate, erp, |
438b61b7 SW |
198 | tx->sdata->vif.bss_conf.use_short_preamble, |
199 | shift); | |
e2ebc74d JB |
200 | } |
201 | ||
03f93c3d | 202 | return cpu_to_le16(dur); |
e2ebc74d JB |
203 | } |
204 | ||
e2ebc74d | 205 | /* tx handlers */ |
5c1b98a5 KV |
206 | static ieee80211_tx_result debug_noinline |
207 | ieee80211_tx_h_dynamic_ps(struct ieee80211_tx_data *tx) | |
208 | { | |
209 | struct ieee80211_local *local = tx->local; | |
0c74211d | 210 | struct ieee80211_if_managed *ifmgd; |
94a5b3ac | 211 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx->skb); |
5c1b98a5 KV |
212 | |
213 | /* driver doesn't support power save */ | |
30686bf7 | 214 | if (!ieee80211_hw_check(&local->hw, SUPPORTS_PS)) |
5c1b98a5 KV |
215 | return TX_CONTINUE; |
216 | ||
217 | /* hardware does dynamic power save */ | |
30686bf7 | 218 | if (ieee80211_hw_check(&local->hw, SUPPORTS_DYNAMIC_PS)) |
5c1b98a5 KV |
219 | return TX_CONTINUE; |
220 | ||
221 | /* dynamic power save disabled */ | |
222 | if (local->hw.conf.dynamic_ps_timeout <= 0) | |
223 | return TX_CONTINUE; | |
224 | ||
225 | /* we are scanning, don't enable power save */ | |
226 | if (local->scanning) | |
227 | return TX_CONTINUE; | |
228 | ||
229 | if (!local->ps_sdata) | |
230 | return TX_CONTINUE; | |
231 | ||
232 | /* No point if we're going to suspend */ | |
233 | if (local->quiescing) | |
234 | return TX_CONTINUE; | |
235 | ||
0c74211d KV |
236 | /* dynamic ps is supported only in managed mode */ |
237 | if (tx->sdata->vif.type != NL80211_IFTYPE_STATION) | |
238 | return TX_CONTINUE; | |
239 | ||
94a5b3ac AO |
240 | if (unlikely(info->flags & IEEE80211_TX_INTFL_OFFCHAN_TX_OK)) |
241 | return TX_CONTINUE; | |
242 | ||
0c74211d KV |
243 | ifmgd = &tx->sdata->u.mgd; |
244 | ||
245 | /* | |
246 | * Don't wakeup from power save if u-apsd is enabled, voip ac has | |
247 | * u-apsd enabled and the frame is in voip class. This effectively | |
248 | * means that even if all access categories have u-apsd enabled, in | |
249 | * practise u-apsd is only used with the voip ac. This is a | |
250 | * workaround for the case when received voip class packets do not | |
251 | * have correct qos tag for some reason, due the network or the | |
252 | * peer application. | |
253 | * | |
dc41e4d4 | 254 | * Note: ifmgd->uapsd_queues access is racy here. If the value is |
0c74211d KV |
255 | * changed via debugfs, user needs to reassociate manually to have |
256 | * everything in sync. | |
257 | */ | |
4875d30d JB |
258 | if ((ifmgd->flags & IEEE80211_STA_UAPSD_ENABLED) && |
259 | (ifmgd->uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VO) && | |
260 | skb_get_queue_mapping(tx->skb) == IEEE80211_AC_VO) | |
0c74211d KV |
261 | return TX_CONTINUE; |
262 | ||
5c1b98a5 KV |
263 | if (local->hw.conf.flags & IEEE80211_CONF_PS) { |
264 | ieee80211_stop_queues_by_reason(&local->hw, | |
445ea4e8 | 265 | IEEE80211_MAX_QUEUE_MAP, |
cca07b00 LC |
266 | IEEE80211_QUEUE_STOP_REASON_PS, |
267 | false); | |
db28569a | 268 | ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED; |
5c1b98a5 KV |
269 | ieee80211_queue_work(&local->hw, |
270 | &local->dynamic_ps_disable_work); | |
271 | } | |
272 | ||
5db1c07c LC |
273 | /* Don't restart the timer if we're not disassociated */ |
274 | if (!ifmgd->associated) | |
275 | return TX_CONTINUE; | |
276 | ||
5c1b98a5 KV |
277 | mod_timer(&local->dynamic_ps_timer, jiffies + |
278 | msecs_to_jiffies(local->hw.conf.dynamic_ps_timeout)); | |
279 | ||
280 | return TX_CONTINUE; | |
281 | } | |
e2ebc74d | 282 | |
d9e8a70f | 283 | static ieee80211_tx_result debug_noinline |
5cf121c3 | 284 | ieee80211_tx_h_check_assoc(struct ieee80211_tx_data *tx) |
e2ebc74d | 285 | { |
358c8d9d | 286 | |
e039fa4a | 287 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)tx->skb->data; |
e039fa4a | 288 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx->skb); |
c2c98fde | 289 | bool assoc = false; |
e2ebc74d | 290 | |
e039fa4a | 291 | if (unlikely(info->flags & IEEE80211_TX_CTL_INJECTED)) |
9ae54c84 | 292 | return TX_CONTINUE; |
58d4185e | 293 | |
b23b025f BG |
294 | if (unlikely(test_bit(SCAN_SW_SCANNING, &tx->local->scanning)) && |
295 | test_bit(SDATA_STATE_OFFCHANNEL, &tx->sdata->state) && | |
a9a6ffff | 296 | !ieee80211_is_probe_req(hdr->frame_control) && |
30b2f0be | 297 | !ieee80211_is_any_nullfunc(hdr->frame_control)) |
a9a6ffff KV |
298 | /* |
299 | * When software scanning only nullfunc frames (to notify | |
300 | * the sleep state to the AP) and probe requests (for the | |
301 | * active scan) are allowed, all other frames should not be | |
302 | * sent and we should not get here, but if we do | |
303 | * nonetheless, drop them to avoid sending them | |
304 | * off-channel. See the link below and | |
305 | * ieee80211_start_scan() for more. | |
306 | * | |
307 | * http://article.gmane.org/gmane.linux.kernel.wireless.general/30089 | |
308 | */ | |
9ae54c84 | 309 | return TX_DROP; |
e2ebc74d | 310 | |
239281f8 RL |
311 | if (tx->sdata->vif.type == NL80211_IFTYPE_OCB) |
312 | return TX_CONTINUE; | |
313 | ||
5cf121c3 | 314 | if (tx->flags & IEEE80211_TX_PS_BUFFERED) |
9ae54c84 | 315 | return TX_CONTINUE; |
e2ebc74d | 316 | |
c2c98fde JB |
317 | if (tx->sta) |
318 | assoc = test_sta_flag(tx->sta, WLAN_STA_ASSOC); | |
e2ebc74d | 319 | |
5cf121c3 | 320 | if (likely(tx->flags & IEEE80211_TX_UNICAST)) { |
c2c98fde | 321 | if (unlikely(!assoc && |
358c8d9d | 322 | ieee80211_is_data(hdr->frame_control))) { |
e2ebc74d | 323 | #ifdef CONFIG_MAC80211_VERBOSE_DEBUG |
bdcbd8e0 JB |
324 | sdata_info(tx->sdata, |
325 | "dropped data frame to not associated station %pM\n", | |
326 | hdr->addr1); | |
327 | #endif | |
e2ebc74d | 328 | I802_DEBUG_INC(tx->local->tx_handlers_drop_not_assoc); |
9ae54c84 | 329 | return TX_DROP; |
e2ebc74d | 330 | } |
72f15d53 MB |
331 | } else if (unlikely(ieee80211_is_data(hdr->frame_control) && |
332 | ieee80211_vif_get_num_mcast_if(tx->sdata) == 0)) { | |
29623892 JB |
333 | /* |
334 | * No associated STAs - no need to send multicast | |
335 | * frames. | |
336 | */ | |
337 | return TX_DROP; | |
e2ebc74d JB |
338 | } |
339 | ||
9ae54c84 | 340 | return TX_CONTINUE; |
e2ebc74d JB |
341 | } |
342 | ||
e2ebc74d JB |
343 | /* This function is called whenever the AP is about to exceed the maximum limit |
344 | * of buffered frames for power saving STAs. This situation should not really | |
345 | * happen often during normal operation, so dropping the oldest buffered packet | |
346 | * from each queue should be OK to make some room for new frames. */ | |
347 | static void purge_old_ps_buffers(struct ieee80211_local *local) | |
348 | { | |
349 | int total = 0, purged = 0; | |
350 | struct sk_buff *skb; | |
351 | struct ieee80211_sub_if_data *sdata; | |
352 | struct sta_info *sta; | |
353 | ||
79010420 | 354 | list_for_each_entry_rcu(sdata, &local->interfaces, list) { |
d012a605 MP |
355 | struct ps_data *ps; |
356 | ||
357 | if (sdata->vif.type == NL80211_IFTYPE_AP) | |
358 | ps = &sdata->u.ap.ps; | |
3f52b7e3 MP |
359 | else if (ieee80211_vif_is_mesh(&sdata->vif)) |
360 | ps = &sdata->u.mesh.ps; | |
d012a605 | 361 | else |
e2ebc74d | 362 | continue; |
d012a605 MP |
363 | |
364 | skb = skb_dequeue(&ps->bc_buf); | |
e2ebc74d JB |
365 | if (skb) { |
366 | purged++; | |
6b07d9ca | 367 | ieee80211_free_txskb(&local->hw, skb); |
e2ebc74d | 368 | } |
d012a605 | 369 | total += skb_queue_len(&ps->bc_buf); |
e2ebc74d | 370 | } |
e2ebc74d | 371 | |
948d887d JB |
372 | /* |
373 | * Drop one frame from each station from the lowest-priority | |
374 | * AC that has frames at all. | |
375 | */ | |
d0709a65 | 376 | list_for_each_entry_rcu(sta, &local->sta_list, list) { |
948d887d JB |
377 | int ac; |
378 | ||
379 | for (ac = IEEE80211_AC_BK; ac >= IEEE80211_AC_VO; ac--) { | |
380 | skb = skb_dequeue(&sta->ps_tx_buf[ac]); | |
381 | total += skb_queue_len(&sta->ps_tx_buf[ac]); | |
382 | if (skb) { | |
383 | purged++; | |
c3e7724b | 384 | ieee80211_free_txskb(&local->hw, skb); |
948d887d JB |
385 | break; |
386 | } | |
e2ebc74d | 387 | } |
e2ebc74d | 388 | } |
d0709a65 | 389 | |
e2ebc74d | 390 | local->total_ps_buffered = total; |
bdcbd8e0 | 391 | ps_dbg_hw(&local->hw, "PS buffers full - purged %d frames\n", purged); |
e2ebc74d JB |
392 | } |
393 | ||
9ae54c84 | 394 | static ieee80211_tx_result |
5cf121c3 | 395 | ieee80211_tx_h_multicast_ps_buf(struct ieee80211_tx_data *tx) |
e2ebc74d | 396 | { |
e039fa4a | 397 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx->skb); |
358c8d9d | 398 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)tx->skb->data; |
d012a605 | 399 | struct ps_data *ps; |
e039fa4a | 400 | |
7d54d0dd JB |
401 | /* |
402 | * broadcast/multicast frame | |
403 | * | |
3f52b7e3 | 404 | * If any of the associated/peer stations is in power save mode, |
7d54d0dd JB |
405 | * the frame is buffered to be sent after DTIM beacon frame. |
406 | * This is done either by the hardware or us. | |
407 | */ | |
408 | ||
3f52b7e3 | 409 | /* powersaving STAs currently only in AP/VLAN/mesh mode */ |
d012a605 MP |
410 | if (tx->sdata->vif.type == NL80211_IFTYPE_AP || |
411 | tx->sdata->vif.type == NL80211_IFTYPE_AP_VLAN) { | |
412 | if (!tx->sdata->bss) | |
413 | return TX_CONTINUE; | |
414 | ||
415 | ps = &tx->sdata->bss->ps; | |
3f52b7e3 MP |
416 | } else if (ieee80211_vif_is_mesh(&tx->sdata->vif)) { |
417 | ps = &tx->sdata->u.mesh.ps; | |
d012a605 | 418 | } else { |
3e122be0 | 419 | return TX_CONTINUE; |
d012a605 MP |
420 | } |
421 | ||
3e122be0 JB |
422 | |
423 | /* no buffering for ordered frames */ | |
358c8d9d | 424 | if (ieee80211_has_order(hdr->frame_control)) |
9ae54c84 | 425 | return TX_CONTINUE; |
7d54d0dd | 426 | |
08b99399 JB |
427 | if (ieee80211_is_probe_req(hdr->frame_control)) |
428 | return TX_CONTINUE; | |
429 | ||
30686bf7 | 430 | if (ieee80211_hw_check(&tx->local->hw, QUEUE_CONTROL)) |
f4d57941 JB |
431 | info->hw_queue = tx->sdata->vif.cab_queue; |
432 | ||
9ec1190d FF |
433 | /* no stations in PS mode and no buffered packets */ |
434 | if (!atomic_read(&ps->num_sta_ps) && skb_queue_empty(&ps->bc_buf)) | |
9ae54c84 | 435 | return TX_CONTINUE; |
7d54d0dd | 436 | |
62b517cb | 437 | info->flags |= IEEE80211_TX_CTL_SEND_AFTER_DTIM; |
62b1208e | 438 | |
62b517cb | 439 | /* device releases frame after DTIM beacon */ |
30686bf7 | 440 | if (!ieee80211_hw_check(&tx->local->hw, HOST_BROADCAST_PS_BUFFERING)) |
62b1208e | 441 | return TX_CONTINUE; |
62b1208e | 442 | |
7d54d0dd | 443 | /* buffered in mac80211 */ |
62b1208e JB |
444 | if (tx->local->total_ps_buffered >= TOTAL_MAX_TX_BUFFER) |
445 | purge_old_ps_buffers(tx->local); | |
446 | ||
d012a605 | 447 | if (skb_queue_len(&ps->bc_buf) >= AP_MAX_BC_BUFFER) { |
bdcbd8e0 JB |
448 | ps_dbg(tx->sdata, |
449 | "BC TX buffer full - dropping the oldest frame\n"); | |
6b07d9ca | 450 | ieee80211_free_txskb(&tx->local->hw, skb_dequeue(&ps->bc_buf)); |
62b1208e JB |
451 | } else |
452 | tx->local->total_ps_buffered++; | |
e2ebc74d | 453 | |
d012a605 | 454 | skb_queue_tail(&ps->bc_buf, tx->skb); |
7d54d0dd | 455 | |
62b1208e | 456 | return TX_QUEUED; |
e2ebc74d JB |
457 | } |
458 | ||
fb733336 JM |
459 | static int ieee80211_use_mfp(__le16 fc, struct sta_info *sta, |
460 | struct sk_buff *skb) | |
461 | { | |
462 | if (!ieee80211_is_mgmt(fc)) | |
463 | return 0; | |
464 | ||
c2c98fde | 465 | if (sta == NULL || !test_sta_flag(sta, WLAN_STA_MFP)) |
fb733336 JM |
466 | return 0; |
467 | ||
d8ca16db | 468 | if (!ieee80211_is_robust_mgmt_frame(skb)) |
fb733336 JM |
469 | return 0; |
470 | ||
471 | return 1; | |
472 | } | |
473 | ||
9ae54c84 | 474 | static ieee80211_tx_result |
5cf121c3 | 475 | ieee80211_tx_h_unicast_ps_buf(struct ieee80211_tx_data *tx) |
e2ebc74d JB |
476 | { |
477 | struct sta_info *sta = tx->sta; | |
e039fa4a | 478 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx->skb); |
08b99399 | 479 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)tx->skb->data; |
3393a608 | 480 | struct ieee80211_local *local = tx->local; |
e2ebc74d | 481 | |
02f2f1a9 | 482 | if (unlikely(!sta)) |
9ae54c84 | 483 | return TX_CONTINUE; |
e2ebc74d | 484 | |
c2c98fde | 485 | if (unlikely((test_sta_flag(sta, WLAN_STA_PS_STA) || |
5ac2e350 JB |
486 | test_sta_flag(sta, WLAN_STA_PS_DRIVER) || |
487 | test_sta_flag(sta, WLAN_STA_PS_DELIVER)) && | |
02f2f1a9 | 488 | !(info->flags & IEEE80211_TX_CTL_NO_PS_BUFFER))) { |
948d887d JB |
489 | int ac = skb_get_queue_mapping(tx->skb); |
490 | ||
08b99399 JB |
491 | if (ieee80211_is_mgmt(hdr->frame_control) && |
492 | !ieee80211_is_bufferable_mmpdu(hdr->frame_control)) { | |
493 | info->flags |= IEEE80211_TX_CTL_NO_PS_BUFFER; | |
494 | return TX_CONTINUE; | |
495 | } | |
496 | ||
bdcbd8e0 JB |
497 | ps_dbg(sta->sdata, "STA %pM aid %d: PS buffer for AC %d\n", |
498 | sta->sta.addr, sta->sta.aid, ac); | |
e2ebc74d JB |
499 | if (tx->local->total_ps_buffered >= TOTAL_MAX_TX_BUFFER) |
500 | purge_old_ps_buffers(tx->local); | |
1d147bfa EG |
501 | |
502 | /* sync with ieee80211_sta_ps_deliver_wakeup */ | |
503 | spin_lock(&sta->ps_lock); | |
504 | /* | |
505 | * STA woke up the meantime and all the frames on ps_tx_buf have | |
506 | * been queued to pending queue. No reordering can happen, go | |
507 | * ahead and Tx the packet. | |
508 | */ | |
509 | if (!test_sta_flag(sta, WLAN_STA_PS_STA) && | |
5ac2e350 JB |
510 | !test_sta_flag(sta, WLAN_STA_PS_DRIVER) && |
511 | !test_sta_flag(sta, WLAN_STA_PS_DELIVER)) { | |
1d147bfa EG |
512 | spin_unlock(&sta->ps_lock); |
513 | return TX_CONTINUE; | |
514 | } | |
515 | ||
948d887d JB |
516 | if (skb_queue_len(&sta->ps_tx_buf[ac]) >= STA_MAX_TX_BUFFER) { |
517 | struct sk_buff *old = skb_dequeue(&sta->ps_tx_buf[ac]); | |
bdcbd8e0 JB |
518 | ps_dbg(tx->sdata, |
519 | "STA %pM TX buffer for AC %d full - dropping oldest frame\n", | |
520 | sta->sta.addr, ac); | |
c3e7724b | 521 | ieee80211_free_txskb(&local->hw, old); |
e2ebc74d JB |
522 | } else |
523 | tx->local->total_ps_buffered++; | |
004c872e | 524 | |
e039fa4a | 525 | info->control.jiffies = jiffies; |
5061b0c2 | 526 | info->control.vif = &tx->sdata->vif; |
cc20ff2c | 527 | info->control.flags |= IEEE80211_TX_INTCFL_NEED_TXPROCESSING; |
03c8c06f | 528 | info->flags &= ~IEEE80211_TX_TEMPORARY_FLAGS; |
948d887d | 529 | skb_queue_tail(&sta->ps_tx_buf[ac], tx->skb); |
1d147bfa | 530 | spin_unlock(&sta->ps_lock); |
3393a608 JO |
531 | |
532 | if (!timer_pending(&local->sta_cleanup)) | |
533 | mod_timer(&local->sta_cleanup, | |
534 | round_jiffies(jiffies + | |
535 | STA_INFO_CLEANUP_INTERVAL)); | |
536 | ||
c868cb35 JB |
537 | /* |
538 | * We queued up some frames, so the TIM bit might | |
539 | * need to be set, recalculate it. | |
540 | */ | |
541 | sta_info_recalc_tim(sta); | |
542 | ||
9ae54c84 | 543 | return TX_QUEUED; |
bdcbd8e0 JB |
544 | } else if (unlikely(test_sta_flag(sta, WLAN_STA_PS_STA))) { |
545 | ps_dbg(tx->sdata, | |
546 | "STA %pM in PS mode, but polling/in SP -> send frame\n", | |
547 | sta->sta.addr); | |
e2ebc74d | 548 | } |
e2ebc74d | 549 | |
9ae54c84 | 550 | return TX_CONTINUE; |
e2ebc74d JB |
551 | } |
552 | ||
d9e8a70f | 553 | static ieee80211_tx_result debug_noinline |
5cf121c3 | 554 | ieee80211_tx_h_ps_buf(struct ieee80211_tx_data *tx) |
e2ebc74d | 555 | { |
5cf121c3 | 556 | if (unlikely(tx->flags & IEEE80211_TX_PS_BUFFERED)) |
9ae54c84 | 557 | return TX_CONTINUE; |
e2ebc74d | 558 | |
5cf121c3 | 559 | if (tx->flags & IEEE80211_TX_UNICAST) |
e2ebc74d JB |
560 | return ieee80211_tx_h_unicast_ps_buf(tx); |
561 | else | |
562 | return ieee80211_tx_h_multicast_ps_buf(tx); | |
563 | } | |
564 | ||
a621fa4d JB |
565 | static ieee80211_tx_result debug_noinline |
566 | ieee80211_tx_h_check_control_port_protocol(struct ieee80211_tx_data *tx) | |
567 | { | |
568 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx->skb); | |
569 | ||
af61a165 JB |
570 | if (unlikely(tx->sdata->control_port_protocol == tx->skb->protocol)) { |
571 | if (tx->sdata->control_port_no_encrypt) | |
572 | info->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT; | |
573 | info->control.flags |= IEEE80211_TX_CTRL_PORT_CTRL_PROTO; | |
9c1c98a3 | 574 | info->flags |= IEEE80211_TX_CTL_USE_MINRATE; |
af61a165 | 575 | } |
a621fa4d JB |
576 | |
577 | return TX_CONTINUE; | |
578 | } | |
579 | ||
d9e8a70f | 580 | static ieee80211_tx_result debug_noinline |
5cf121c3 | 581 | ieee80211_tx_h_select_key(struct ieee80211_tx_data *tx) |
e2ebc74d | 582 | { |
46e6de15 | 583 | struct ieee80211_key *key; |
e039fa4a | 584 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx->skb); |
358c8d9d | 585 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)tx->skb->data; |
d4e46a3d | 586 | |
a0761a30 | 587 | if (unlikely(info->flags & IEEE80211_TX_INTFL_DONT_ENCRYPT)) { |
e2ebc74d | 588 | tx->key = NULL; |
a0761a30 JB |
589 | return TX_CONTINUE; |
590 | } | |
591 | ||
592 | if (tx->sta && | |
593 | (key = rcu_dereference(tx->sta->ptk[tx->sta->ptk_idx]))) | |
d4e46a3d | 594 | tx->key = key; |
46f6b060 MH |
595 | else if (ieee80211_is_group_privacy_action(tx->skb) && |
596 | (key = rcu_dereference(tx->sdata->default_multicast_key))) | |
597 | tx->key = key; | |
3cfcf6ac | 598 | else if (ieee80211_is_mgmt(hdr->frame_control) && |
ecbcd324 | 599 | is_multicast_ether_addr(hdr->addr1) && |
d8ca16db | 600 | ieee80211_is_robust_mgmt_frame(tx->skb) && |
3cfcf6ac JM |
601 | (key = rcu_dereference(tx->sdata->default_mgmt_key))) |
602 | tx->key = key; | |
f7e0104c JB |
603 | else if (is_multicast_ether_addr(hdr->addr1) && |
604 | (key = rcu_dereference(tx->sdata->default_multicast_key))) | |
605 | tx->key = key; | |
606 | else if (!is_multicast_ether_addr(hdr->addr1) && | |
607 | (key = rcu_dereference(tx->sdata->default_unicast_key))) | |
d4e46a3d | 608 | tx->key = key; |
e8f4fb7c | 609 | else |
4922f71f | 610 | tx->key = NULL; |
e2ebc74d JB |
611 | |
612 | if (tx->key) { | |
813d7669 JB |
613 | bool skip_hw = false; |
614 | ||
011bfcc4 | 615 | /* TODO: add threshold stuff again */ |
176e4f84 | 616 | |
97359d12 JB |
617 | switch (tx->key->conf.cipher) { |
618 | case WLAN_CIPHER_SUITE_WEP40: | |
619 | case WLAN_CIPHER_SUITE_WEP104: | |
97359d12 | 620 | case WLAN_CIPHER_SUITE_TKIP: |
358c8d9d | 621 | if (!ieee80211_is_data_present(hdr->frame_control)) |
176e4f84 JB |
622 | tx->key = NULL; |
623 | break; | |
97359d12 | 624 | case WLAN_CIPHER_SUITE_CCMP: |
2b2ba0db | 625 | case WLAN_CIPHER_SUITE_CCMP_256: |
00b9cfa3 JM |
626 | case WLAN_CIPHER_SUITE_GCMP: |
627 | case WLAN_CIPHER_SUITE_GCMP_256: | |
fb733336 JM |
628 | if (!ieee80211_is_data_present(hdr->frame_control) && |
629 | !ieee80211_use_mfp(hdr->frame_control, tx->sta, | |
46f6b060 MH |
630 | tx->skb) && |
631 | !ieee80211_is_group_privacy_action(tx->skb)) | |
fb733336 | 632 | tx->key = NULL; |
3b43a187 KV |
633 | else |
634 | skip_hw = (tx->key->conf.flags & | |
e548c49e | 635 | IEEE80211_KEY_FLAG_SW_MGMT_TX) && |
3b43a187 | 636 | ieee80211_is_mgmt(hdr->frame_control); |
fb733336 | 637 | break; |
97359d12 | 638 | case WLAN_CIPHER_SUITE_AES_CMAC: |
56c52da2 | 639 | case WLAN_CIPHER_SUITE_BIP_CMAC_256: |
8ade538b JM |
640 | case WLAN_CIPHER_SUITE_BIP_GMAC_128: |
641 | case WLAN_CIPHER_SUITE_BIP_GMAC_256: | |
3cfcf6ac JM |
642 | if (!ieee80211_is_mgmt(hdr->frame_control)) |
643 | tx->key = NULL; | |
644 | break; | |
176e4f84 | 645 | } |
813d7669 | 646 | |
e54faf29 JB |
647 | if (unlikely(tx->key && tx->key->flags & KEY_FLAG_TAINTED && |
648 | !ieee80211_is_deauth(hdr->frame_control))) | |
95acac61 JB |
649 | return TX_DROP; |
650 | ||
f12553eb | 651 | if (!skip_hw && tx->key && |
382b1655 | 652 | tx->key->flags & KEY_FLAG_UPLOADED_TO_HARDWARE) |
813d7669 | 653 | info->control.hw_key = &tx->key->conf; |
2463ec86 | 654 | } else if (ieee80211_is_data_present(hdr->frame_control) && tx->sta && |
a0761a30 JB |
655 | test_sta_flag(tx->sta, WLAN_STA_USES_ENCRYPTION)) { |
656 | return TX_DROP; | |
e2ebc74d JB |
657 | } |
658 | ||
9ae54c84 | 659 | return TX_CONTINUE; |
e2ebc74d JB |
660 | } |
661 | ||
d9e8a70f | 662 | static ieee80211_tx_result debug_noinline |
5cf121c3 | 663 | ieee80211_tx_h_rate_ctrl(struct ieee80211_tx_data *tx) |
e2ebc74d | 664 | { |
e039fa4a | 665 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx->skb); |
e6a9854b JB |
666 | struct ieee80211_hdr *hdr = (void *)tx->skb->data; |
667 | struct ieee80211_supported_band *sband; | |
a2c40249 | 668 | u32 len; |
e6a9854b | 669 | struct ieee80211_tx_rate_control txrc; |
0d528d85 | 670 | struct ieee80211_sta_rates *ratetbl = NULL; |
3187ba0c | 671 | bool encap = info->flags & IEEE80211_TX_CTL_HW_80211_ENCAP; |
c2c98fde | 672 | bool assoc = false; |
8318d78a | 673 | |
e6a9854b | 674 | memset(&txrc, 0, sizeof(txrc)); |
e2ebc74d | 675 | |
2d56577b | 676 | sband = tx->local->hw.wiphy->bands[info->band]; |
58d4185e | 677 | |
a2c40249 | 678 | len = min_t(u32, tx->skb->len + FCS_LEN, |
b9a5f8ca | 679 | tx->local->hw.wiphy->frag_threshold); |
e6a9854b JB |
680 | |
681 | /* set up the tx rate control struct we give the RC algo */ | |
005e472b | 682 | txrc.hw = &tx->local->hw; |
e6a9854b JB |
683 | txrc.sband = sband; |
684 | txrc.bss_conf = &tx->sdata->vif.bss_conf; | |
685 | txrc.skb = tx->skb; | |
686 | txrc.reported_rate.idx = -1; | |
2d56577b | 687 | txrc.rate_idx_mask = tx->sdata->rc_rateidx_mask[info->band]; |
2ffbe6d3 FF |
688 | |
689 | if (tx->sdata->rc_has_mcs_mask[info->band]) | |
690 | txrc.rate_idx_mcs_mask = | |
691 | tx->sdata->rc_rateidx_mcs_mask[info->band]; | |
692 | ||
8f0729b1 | 693 | txrc.bss = (tx->sdata->vif.type == NL80211_IFTYPE_AP || |
4bb62344 | 694 | tx->sdata->vif.type == NL80211_IFTYPE_MESH_POINT || |
5765f9f6 BVB |
695 | tx->sdata->vif.type == NL80211_IFTYPE_ADHOC || |
696 | tx->sdata->vif.type == NL80211_IFTYPE_OCB); | |
e6a9854b JB |
697 | |
698 | /* set up RTS protection if desired */ | |
b9a5f8ca | 699 | if (len > tx->local->hw.wiphy->rts_threshold) { |
0d528d85 | 700 | txrc.rts = true; |
e2ebc74d | 701 | } |
e2ebc74d | 702 | |
0d528d85 | 703 | info->control.use_rts = txrc.rts; |
991fec09 FF |
704 | info->control.use_cts_prot = tx->sdata->vif.bss_conf.use_cts_prot; |
705 | ||
e6a9854b JB |
706 | /* |
707 | * Use short preamble if the BSS can handle it, but not for | |
708 | * management frames unless we know the receiver can handle | |
709 | * that -- the management frame might be to a station that | |
710 | * just wants a probe response. | |
711 | */ | |
712 | if (tx->sdata->vif.bss_conf.use_short_preamble && | |
3187ba0c | 713 | (ieee80211_is_tx_data(tx->skb) || |
c2c98fde | 714 | (tx->sta && test_sta_flag(tx->sta, WLAN_STA_SHORT_PREAMBLE)))) |
0d528d85 FF |
715 | txrc.short_preamble = true; |
716 | ||
717 | info->control.short_preamble = txrc.short_preamble; | |
e2ebc74d | 718 | |
dfdfc2be SE |
719 | /* don't ask rate control when rate already injected via radiotap */ |
720 | if (info->control.flags & IEEE80211_TX_CTRL_RATE_INJECT) | |
721 | return TX_CONTINUE; | |
722 | ||
c2c98fde JB |
723 | if (tx->sta) |
724 | assoc = test_sta_flag(tx->sta, WLAN_STA_ASSOC); | |
b770b43e LR |
725 | |
726 | /* | |
727 | * Lets not bother rate control if we're associated and cannot | |
728 | * talk to the sta. This should not happen. | |
729 | */ | |
c2c98fde | 730 | if (WARN(test_bit(SCAN_SW_SCANNING, &tx->local->scanning) && assoc && |
b770b43e LR |
731 | !rate_usable_index_exists(sband, &tx->sta->sta), |
732 | "%s: Dropped data frame as no usable bitrate found while " | |
733 | "scanning and associated. Target station: " | |
734 | "%pM on %d GHz band\n", | |
3187ba0c RL |
735 | tx->sdata->name, |
736 | encap ? ((struct ethhdr *)hdr)->h_dest : hdr->addr1, | |
2d56577b | 737 | info->band ? 5 : 2)) |
b770b43e | 738 | return TX_DROP; |
2e92e6f2 | 739 | |
b770b43e LR |
740 | /* |
741 | * If we're associated with the sta at this point we know we can at | |
742 | * least send the frame at the lowest bit rate. | |
743 | */ | |
e6a9854b JB |
744 | rate_control_get_rate(tx->sdata, tx->sta, &txrc); |
745 | ||
0d528d85 FF |
746 | if (tx->sta && !info->control.skip_table) |
747 | ratetbl = rcu_dereference(tx->sta->sta.rates); | |
748 | ||
749 | if (unlikely(info->control.rates[0].idx < 0)) { | |
750 | if (ratetbl) { | |
751 | struct ieee80211_tx_rate rate = { | |
752 | .idx = ratetbl->rate[0].idx, | |
753 | .flags = ratetbl->rate[0].flags, | |
754 | .count = ratetbl->rate[0].count | |
755 | }; | |
756 | ||
757 | if (ratetbl->rate[0].idx < 0) | |
758 | return TX_DROP; | |
759 | ||
760 | tx->rate = rate; | |
761 | } else { | |
762 | return TX_DROP; | |
763 | } | |
764 | } else { | |
765 | tx->rate = info->control.rates[0]; | |
766 | } | |
e6a9854b | 767 | |
c1ce5a74 | 768 | if (txrc.reported_rate.idx < 0) { |
0d528d85 | 769 | txrc.reported_rate = tx->rate; |
3187ba0c | 770 | if (tx->sta && ieee80211_is_tx_data(tx->skb)) |
046d2e7c | 771 | tx->sta->deflink.tx_stats.last_rate = txrc.reported_rate; |
c1ce5a74 | 772 | } else if (tx->sta) |
046d2e7c | 773 | tx->sta->deflink.tx_stats.last_rate = txrc.reported_rate; |
e039fa4a | 774 | |
0d528d85 FF |
775 | if (ratetbl) |
776 | return TX_CONTINUE; | |
777 | ||
e6a9854b JB |
778 | if (unlikely(!info->control.rates[0].count)) |
779 | info->control.rates[0].count = 1; | |
e2ebc74d | 780 | |
9955151d GS |
781 | if (WARN_ON_ONCE((info->control.rates[0].count > 1) && |
782 | (info->flags & IEEE80211_TX_CTL_NO_ACK))) | |
783 | info->control.rates[0].count = 1; | |
784 | ||
e6a9854b JB |
785 | return TX_CONTINUE; |
786 | } | |
787 | ||
ba8c3d6f FF |
788 | static __le16 ieee80211_tx_next_seq(struct sta_info *sta, int tid) |
789 | { | |
790 | u16 *seq = &sta->tid_seq[tid]; | |
791 | __le16 ret = cpu_to_le16(*seq); | |
792 | ||
793 | /* Increase the sequence number. */ | |
794 | *seq = (*seq + 0x10) & IEEE80211_SCTL_SEQ; | |
795 | ||
796 | return ret; | |
797 | } | |
798 | ||
f591fa5d JB |
799 | static ieee80211_tx_result debug_noinline |
800 | ieee80211_tx_h_sequence(struct ieee80211_tx_data *tx) | |
801 | { | |
802 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx->skb); | |
803 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)tx->skb->data; | |
f591fa5d JB |
804 | int tid; |
805 | ||
25d834e1 JB |
806 | /* |
807 | * Packet injection may want to control the sequence | |
808 | * number, if we have no matching interface then we | |
809 | * neither assign one ourselves nor ask the driver to. | |
810 | */ | |
5061b0c2 | 811 | if (unlikely(info->control.vif->type == NL80211_IFTYPE_MONITOR)) |
25d834e1 JB |
812 | return TX_CONTINUE; |
813 | ||
f591fa5d JB |
814 | if (unlikely(ieee80211_is_ctl(hdr->frame_control))) |
815 | return TX_CONTINUE; | |
816 | ||
817 | if (ieee80211_hdrlen(hdr->frame_control) < 24) | |
818 | return TX_CONTINUE; | |
819 | ||
49a59543 JB |
820 | if (ieee80211_is_qos_nullfunc(hdr->frame_control)) |
821 | return TX_CONTINUE; | |
822 | ||
29c3e95f MV |
823 | if (info->control.flags & IEEE80211_TX_CTRL_NO_SEQNO) |
824 | return TX_CONTINUE; | |
825 | ||
94778280 JB |
826 | /* |
827 | * Anything but QoS data that has a sequence number field | |
828 | * (is long enough) gets a sequence number from the global | |
c4c205f3 BC |
829 | * counter. QoS data frames with a multicast destination |
830 | * also use the global counter (802.11-2012 9.3.2.10). | |
94778280 | 831 | */ |
c4c205f3 BC |
832 | if (!ieee80211_is_data_qos(hdr->frame_control) || |
833 | is_multicast_ether_addr(hdr->addr1)) { | |
94778280 | 834 | /* driver should assign sequence number */ |
f591fa5d | 835 | info->flags |= IEEE80211_TX_CTL_ASSIGN_SEQ; |
94778280 JB |
836 | /* for pure STA mode without beacons, we can do it */ |
837 | hdr->seq_ctrl = cpu_to_le16(tx->sdata->sequence_number); | |
838 | tx->sdata->sequence_number += 0x10; | |
79c892b8 | 839 | if (tx->sta) |
046d2e7c | 840 | tx->sta->deflink.tx_stats.msdu[IEEE80211_NUM_TIDS]++; |
f591fa5d JB |
841 | return TX_CONTINUE; |
842 | } | |
843 | ||
844 | /* | |
845 | * This should be true for injected/management frames only, for | |
846 | * management frames we have set the IEEE80211_TX_CTL_ASSIGN_SEQ | |
847 | * above since they are not QoS-data frames. | |
848 | */ | |
849 | if (!tx->sta) | |
850 | return TX_CONTINUE; | |
851 | ||
852 | /* include per-STA, per-TID sequence counter */ | |
a1f2ba04 | 853 | tid = ieee80211_get_tid(hdr); |
046d2e7c | 854 | tx->sta->deflink.tx_stats.msdu[tid]++; |
f591fa5d | 855 | |
bb42f2d1 | 856 | hdr->seq_ctrl = ieee80211_tx_next_seq(tx->sta, tid); |
f591fa5d JB |
857 | |
858 | return TX_CONTINUE; | |
859 | } | |
860 | ||
252b86c4 | 861 | static int ieee80211_fragment(struct ieee80211_tx_data *tx, |
2de8e0d9 JB |
862 | struct sk_buff *skb, int hdrlen, |
863 | int frag_threshold) | |
864 | { | |
252b86c4 | 865 | struct ieee80211_local *local = tx->local; |
a1a3fcec | 866 | struct ieee80211_tx_info *info; |
252b86c4 | 867 | struct sk_buff *tmp; |
2de8e0d9 JB |
868 | int per_fragm = frag_threshold - hdrlen - FCS_LEN; |
869 | int pos = hdrlen + per_fragm; | |
870 | int rem = skb->len - hdrlen - per_fragm; | |
871 | ||
872 | if (WARN_ON(rem < 0)) | |
873 | return -EINVAL; | |
874 | ||
252b86c4 JB |
875 | /* first fragment was already added to queue by caller */ |
876 | ||
2de8e0d9 JB |
877 | while (rem) { |
878 | int fraglen = per_fragm; | |
879 | ||
880 | if (fraglen > rem) | |
881 | fraglen = rem; | |
882 | rem -= fraglen; | |
883 | tmp = dev_alloc_skb(local->tx_headroom + | |
884 | frag_threshold + | |
2475b1cc | 885 | tx->sdata->encrypt_headroom + |
2de8e0d9 JB |
886 | IEEE80211_ENCRYPT_TAILROOM); |
887 | if (!tmp) | |
888 | return -ENOMEM; | |
252b86c4 JB |
889 | |
890 | __skb_queue_tail(&tx->skbs, tmp); | |
891 | ||
2475b1cc MS |
892 | skb_reserve(tmp, |
893 | local->tx_headroom + tx->sdata->encrypt_headroom); | |
894 | ||
2de8e0d9 JB |
895 | /* copy control information */ |
896 | memcpy(tmp->cb, skb->cb, sizeof(tmp->cb)); | |
a1a3fcec JB |
897 | |
898 | info = IEEE80211_SKB_CB(tmp); | |
899 | info->flags &= ~(IEEE80211_TX_CTL_CLEAR_PS_FILT | | |
900 | IEEE80211_TX_CTL_FIRST_FRAGMENT); | |
901 | ||
902 | if (rem) | |
903 | info->flags |= IEEE80211_TX_CTL_MORE_FRAMES; | |
904 | ||
2de8e0d9 JB |
905 | skb_copy_queue_mapping(tmp, skb); |
906 | tmp->priority = skb->priority; | |
2de8e0d9 | 907 | tmp->dev = skb->dev; |
2de8e0d9 JB |
908 | |
909 | /* copy header and data */ | |
59ae1d12 JB |
910 | skb_put_data(tmp, skb->data, hdrlen); |
911 | skb_put_data(tmp, skb->data + pos, fraglen); | |
2de8e0d9 JB |
912 | |
913 | pos += fraglen; | |
914 | } | |
915 | ||
252b86c4 | 916 | /* adjust first fragment's length */ |
338f977f | 917 | skb_trim(skb, hdrlen + per_fragm); |
2de8e0d9 JB |
918 | return 0; |
919 | } | |
920 | ||
d9e8a70f | 921 | static ieee80211_tx_result debug_noinline |
e2454948 JB |
922 | ieee80211_tx_h_fragment(struct ieee80211_tx_data *tx) |
923 | { | |
2de8e0d9 JB |
924 | struct sk_buff *skb = tx->skb; |
925 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); | |
926 | struct ieee80211_hdr *hdr = (void *)skb->data; | |
b9a5f8ca | 927 | int frag_threshold = tx->local->hw.wiphy->frag_threshold; |
2de8e0d9 JB |
928 | int hdrlen; |
929 | int fragnum; | |
e2454948 | 930 | |
252b86c4 JB |
931 | /* no matter what happens, tx->skb moves to tx->skbs */ |
932 | __skb_queue_tail(&tx->skbs, skb); | |
933 | tx->skb = NULL; | |
934 | ||
a26eb27a JB |
935 | if (info->flags & IEEE80211_TX_CTL_DONTFRAG) |
936 | return TX_CONTINUE; | |
937 | ||
f3fe4e93 | 938 | if (ieee80211_hw_check(&tx->local->hw, SUPPORTS_TX_FRAG)) |
e2454948 JB |
939 | return TX_CONTINUE; |
940 | ||
eefce91a JB |
941 | /* |
942 | * Warn when submitting a fragmented A-MPDU frame and drop it. | |
3b8d81e0 | 943 | * This scenario is handled in ieee80211_tx_prepare but extra |
8d5e0d58 | 944 | * caution taken here as fragmented ampdu may cause Tx stop. |
eefce91a | 945 | */ |
8b30b1fe | 946 | if (WARN_ON(info->flags & IEEE80211_TX_CTL_AMPDU)) |
eefce91a JB |
947 | return TX_DROP; |
948 | ||
065e9605 | 949 | hdrlen = ieee80211_hdrlen(hdr->frame_control); |
e2454948 | 950 | |
a26eb27a | 951 | /* internal error, why isn't DONTFRAG set? */ |
8ccd8f21 | 952 | if (WARN_ON(skb->len + FCS_LEN <= frag_threshold)) |
2de8e0d9 | 953 | return TX_DROP; |
e6a9854b | 954 | |
2de8e0d9 JB |
955 | /* |
956 | * Now fragment the frame. This will allocate all the fragments and | |
957 | * chain them (using skb as the first fragment) to skb->next. | |
958 | * During transmission, we will remove the successfully transmitted | |
959 | * fragments from this list. When the low-level driver rejects one | |
960 | * of the fragments then we will simply pretend to accept the skb | |
961 | * but store it away as pending. | |
962 | */ | |
252b86c4 | 963 | if (ieee80211_fragment(tx, skb, hdrlen, frag_threshold)) |
2de8e0d9 | 964 | return TX_DROP; |
e6a9854b | 965 | |
2de8e0d9 JB |
966 | /* update duration/seq/flags of fragments */ |
967 | fragnum = 0; | |
252b86c4 JB |
968 | |
969 | skb_queue_walk(&tx->skbs, skb) { | |
2de8e0d9 | 970 | const __le16 morefrags = cpu_to_le16(IEEE80211_FCTL_MOREFRAGS); |
e6a9854b | 971 | |
2de8e0d9 JB |
972 | hdr = (void *)skb->data; |
973 | info = IEEE80211_SKB_CB(skb); | |
e6a9854b | 974 | |
252b86c4 | 975 | if (!skb_queue_is_last(&tx->skbs, skb)) { |
2de8e0d9 | 976 | hdr->frame_control |= morefrags; |
e6a9854b JB |
977 | /* |
978 | * No multi-rate retries for fragmented frames, that | |
979 | * would completely throw off the NAV at other STAs. | |
980 | */ | |
981 | info->control.rates[1].idx = -1; | |
982 | info->control.rates[2].idx = -1; | |
983 | info->control.rates[3].idx = -1; | |
e3e1a0bc | 984 | BUILD_BUG_ON(IEEE80211_TX_MAX_RATES != 4); |
e6a9854b | 985 | info->flags &= ~IEEE80211_TX_CTL_RATE_CTRL_PROBE; |
2de8e0d9 JB |
986 | } else { |
987 | hdr->frame_control &= ~morefrags; | |
e6a9854b | 988 | } |
2de8e0d9 JB |
989 | hdr->seq_ctrl |= cpu_to_le16(fragnum & IEEE80211_SCTL_FRAG); |
990 | fragnum++; | |
252b86c4 | 991 | } |
e2ebc74d | 992 | |
9ae54c84 | 993 | return TX_CONTINUE; |
e2ebc74d JB |
994 | } |
995 | ||
feff1f2f JB |
996 | static ieee80211_tx_result debug_noinline |
997 | ieee80211_tx_h_stats(struct ieee80211_tx_data *tx) | |
998 | { | |
252b86c4 | 999 | struct sk_buff *skb; |
560d2682 | 1000 | int ac = -1; |
feff1f2f JB |
1001 | |
1002 | if (!tx->sta) | |
1003 | return TX_CONTINUE; | |
1004 | ||
252b86c4 | 1005 | skb_queue_walk(&tx->skbs, skb) { |
560d2682 | 1006 | ac = skb_get_queue_mapping(skb); |
046d2e7c | 1007 | tx->sta->deflink.tx_stats.bytes[ac] += skb->len; |
252b86c4 | 1008 | } |
560d2682 | 1009 | if (ac >= 0) |
046d2e7c | 1010 | tx->sta->deflink.tx_stats.packets[ac]++; |
feff1f2f JB |
1011 | |
1012 | return TX_CONTINUE; | |
1013 | } | |
1014 | ||
d9e8a70f | 1015 | static ieee80211_tx_result debug_noinline |
e2454948 JB |
1016 | ieee80211_tx_h_encrypt(struct ieee80211_tx_data *tx) |
1017 | { | |
1018 | if (!tx->key) | |
1019 | return TX_CONTINUE; | |
1020 | ||
97359d12 JB |
1021 | switch (tx->key->conf.cipher) { |
1022 | case WLAN_CIPHER_SUITE_WEP40: | |
1023 | case WLAN_CIPHER_SUITE_WEP104: | |
e2454948 | 1024 | return ieee80211_crypto_wep_encrypt(tx); |
97359d12 | 1025 | case WLAN_CIPHER_SUITE_TKIP: |
e2454948 | 1026 | return ieee80211_crypto_tkip_encrypt(tx); |
97359d12 | 1027 | case WLAN_CIPHER_SUITE_CCMP: |
2b2ba0db JM |
1028 | return ieee80211_crypto_ccmp_encrypt( |
1029 | tx, IEEE80211_CCMP_MIC_LEN); | |
1030 | case WLAN_CIPHER_SUITE_CCMP_256: | |
1031 | return ieee80211_crypto_ccmp_encrypt( | |
1032 | tx, IEEE80211_CCMP_256_MIC_LEN); | |
97359d12 | 1033 | case WLAN_CIPHER_SUITE_AES_CMAC: |
3cfcf6ac | 1034 | return ieee80211_crypto_aes_cmac_encrypt(tx); |
56c52da2 JM |
1035 | case WLAN_CIPHER_SUITE_BIP_CMAC_256: |
1036 | return ieee80211_crypto_aes_cmac_256_encrypt(tx); | |
8ade538b JM |
1037 | case WLAN_CIPHER_SUITE_BIP_GMAC_128: |
1038 | case WLAN_CIPHER_SUITE_BIP_GMAC_256: | |
1039 | return ieee80211_crypto_aes_gmac_encrypt(tx); | |
00b9cfa3 JM |
1040 | case WLAN_CIPHER_SUITE_GCMP: |
1041 | case WLAN_CIPHER_SUITE_GCMP_256: | |
1042 | return ieee80211_crypto_gcmp_encrypt(tx); | |
3ffc2a90 | 1043 | default: |
d32a1028 | 1044 | return ieee80211_crypto_hw_encrypt(tx); |
e2454948 JB |
1045 | } |
1046 | ||
e2454948 JB |
1047 | return TX_DROP; |
1048 | } | |
1049 | ||
d9e8a70f | 1050 | static ieee80211_tx_result debug_noinline |
03f93c3d JB |
1051 | ieee80211_tx_h_calculate_duration(struct ieee80211_tx_data *tx) |
1052 | { | |
252b86c4 | 1053 | struct sk_buff *skb; |
2de8e0d9 JB |
1054 | struct ieee80211_hdr *hdr; |
1055 | int next_len; | |
1056 | bool group_addr; | |
03f93c3d | 1057 | |
252b86c4 | 1058 | skb_queue_walk(&tx->skbs, skb) { |
2de8e0d9 | 1059 | hdr = (void *) skb->data; |
7e0aae47 JM |
1060 | if (unlikely(ieee80211_is_pspoll(hdr->frame_control))) |
1061 | break; /* must not overwrite AID */ | |
252b86c4 JB |
1062 | if (!skb_queue_is_last(&tx->skbs, skb)) { |
1063 | struct sk_buff *next = skb_queue_next(&tx->skbs, skb); | |
1064 | next_len = next->len; | |
1065 | } else | |
1066 | next_len = 0; | |
2de8e0d9 | 1067 | group_addr = is_multicast_ether_addr(hdr->addr1); |
03f93c3d | 1068 | |
2de8e0d9 | 1069 | hdr->duration_id = |
252b86c4 JB |
1070 | ieee80211_duration(tx, skb, group_addr, next_len); |
1071 | } | |
03f93c3d JB |
1072 | |
1073 | return TX_CONTINUE; | |
1074 | } | |
1075 | ||
e2ebc74d JB |
1076 | /* actual transmit path */ |
1077 | ||
a622ab72 JB |
1078 | static bool ieee80211_tx_prep_agg(struct ieee80211_tx_data *tx, |
1079 | struct sk_buff *skb, | |
1080 | struct ieee80211_tx_info *info, | |
1081 | struct tid_ampdu_tx *tid_tx, | |
1082 | int tid) | |
1083 | { | |
1084 | bool queued = false; | |
285fa695 | 1085 | bool reset_agg_timer = false; |
aa454580 | 1086 | struct sk_buff *purge_skb = NULL; |
a622ab72 JB |
1087 | |
1088 | if (test_bit(HT_AGG_STATE_OPERATIONAL, &tid_tx->state)) { | |
1089 | info->flags |= IEEE80211_TX_CTL_AMPDU; | |
285fa695 | 1090 | reset_agg_timer = true; |
0ab33703 JB |
1091 | } else if (test_bit(HT_AGG_STATE_WANT_START, &tid_tx->state)) { |
1092 | /* | |
1093 | * nothing -- this aggregation session is being started | |
1094 | * but that might still fail with the driver | |
1095 | */ | |
ba8c3d6f | 1096 | } else if (!tx->sta->sta.txq[tid]) { |
a622ab72 JB |
1097 | spin_lock(&tx->sta->lock); |
1098 | /* | |
1099 | * Need to re-check now, because we may get here | |
1100 | * | |
1101 | * 1) in the window during which the setup is actually | |
1102 | * already done, but not marked yet because not all | |
1103 | * packets are spliced over to the driver pending | |
1104 | * queue yet -- if this happened we acquire the lock | |
1105 | * either before or after the splice happens, but | |
1106 | * need to recheck which of these cases happened. | |
1107 | * | |
1108 | * 2) during session teardown, if the OPERATIONAL bit | |
1109 | * was cleared due to the teardown but the pointer | |
1110 | * hasn't been assigned NULL yet (or we loaded it | |
1111 | * before it was assigned) -- in this case it may | |
1112 | * now be NULL which means we should just let the | |
1113 | * packet pass through because splicing the frames | |
1114 | * back is already done. | |
1115 | */ | |
40b275b6 | 1116 | tid_tx = rcu_dereference_protected_tid_tx(tx->sta, tid); |
a622ab72 JB |
1117 | |
1118 | if (!tid_tx) { | |
1119 | /* do nothing, let packet pass through */ | |
1120 | } else if (test_bit(HT_AGG_STATE_OPERATIONAL, &tid_tx->state)) { | |
1121 | info->flags |= IEEE80211_TX_CTL_AMPDU; | |
285fa695 | 1122 | reset_agg_timer = true; |
a622ab72 JB |
1123 | } else { |
1124 | queued = true; | |
f6d4671a EG |
1125 | if (info->flags & IEEE80211_TX_CTL_NO_PS_BUFFER) { |
1126 | clear_sta_flag(tx->sta, WLAN_STA_SP); | |
1127 | ps_dbg(tx->sta->sdata, | |
1128 | "STA %pM aid %d: SP frame queued, close the SP w/o telling the peer\n", | |
1129 | tx->sta->sta.addr, tx->sta->sta.aid); | |
1130 | } | |
a622ab72 | 1131 | info->control.vif = &tx->sdata->vif; |
cc20ff2c | 1132 | info->control.flags |= IEEE80211_TX_INTCFL_NEED_TXPROCESSING; |
facde7f3 | 1133 | info->flags &= ~IEEE80211_TX_TEMPORARY_FLAGS; |
a622ab72 | 1134 | __skb_queue_tail(&tid_tx->pending, skb); |
aa454580 HS |
1135 | if (skb_queue_len(&tid_tx->pending) > STA_MAX_TX_BUFFER) |
1136 | purge_skb = __skb_dequeue(&tid_tx->pending); | |
a622ab72 JB |
1137 | } |
1138 | spin_unlock(&tx->sta->lock); | |
aa454580 HS |
1139 | |
1140 | if (purge_skb) | |
c3e7724b | 1141 | ieee80211_free_txskb(&tx->local->hw, purge_skb); |
a622ab72 JB |
1142 | } |
1143 | ||
285fa695 | 1144 | /* reset session timer */ |
914eac24 | 1145 | if (reset_agg_timer) |
12d3952f | 1146 | tid_tx->last_tx = jiffies; |
285fa695 | 1147 | |
a622ab72 JB |
1148 | return queued; |
1149 | } | |
1150 | ||
1a791550 FF |
1151 | static void |
1152 | ieee80211_aggr_check(struct ieee80211_sub_if_data *sdata, | |
1153 | struct sta_info *sta, | |
1154 | struct sk_buff *skb) | |
1155 | { | |
1156 | struct rate_control_ref *ref = sdata->local->rate_ctrl; | |
1157 | u16 tid; | |
1158 | ||
1159 | if (!ref || !(ref->ops->capa & RATE_CTRL_CAPA_AMPDU_TRIGGER)) | |
1160 | return; | |
1161 | ||
046d2e7c | 1162 | if (!sta || !sta->sta.deflink.ht_cap.ht_supported || |
1a791550 FF |
1163 | !sta->sta.wme || skb_get_queue_mapping(skb) == IEEE80211_AC_VO || |
1164 | skb->protocol == sdata->control_port_protocol) | |
1165 | return; | |
1166 | ||
1167 | tid = skb->priority & IEEE80211_QOS_CTL_TID_MASK; | |
1168 | if (likely(sta->ampdu_mlme.tid_tx[tid])) | |
1169 | return; | |
1170 | ||
1171 | ieee80211_start_tx_ba_session(&sta->sta, tid, 0); | |
1172 | } | |
1173 | ||
58d4185e JB |
1174 | /* |
1175 | * initialises @tx | |
7c10770f JB |
1176 | * pass %NULL for the station if unknown, a valid pointer if known |
1177 | * or an ERR_PTR() if the station is known not to exist | |
58d4185e | 1178 | */ |
9ae54c84 | 1179 | static ieee80211_tx_result |
3b8d81e0 JB |
1180 | ieee80211_tx_prepare(struct ieee80211_sub_if_data *sdata, |
1181 | struct ieee80211_tx_data *tx, | |
7c10770f | 1182 | struct sta_info *sta, struct sk_buff *skb) |
e2ebc74d | 1183 | { |
3b8d81e0 | 1184 | struct ieee80211_local *local = sdata->local; |
58d4185e | 1185 | struct ieee80211_hdr *hdr; |
e039fa4a | 1186 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); |
1a791550 | 1187 | bool aggr_check = false; |
68f2b517 | 1188 | int tid; |
e2ebc74d JB |
1189 | |
1190 | memset(tx, 0, sizeof(*tx)); | |
1191 | tx->skb = skb; | |
e2ebc74d | 1192 | tx->local = local; |
3b8d81e0 | 1193 | tx->sdata = sdata; |
252b86c4 | 1194 | __skb_queue_head_init(&tx->skbs); |
e2ebc74d | 1195 | |
cd8ffc80 JB |
1196 | /* |
1197 | * If this flag is set to true anywhere, and we get here, | |
1198 | * we are doing the needed processing, so remove the flag | |
1199 | * now. | |
1200 | */ | |
cc20ff2c | 1201 | info->control.flags &= ~IEEE80211_TX_INTCFL_NEED_TXPROCESSING; |
cd8ffc80 | 1202 | |
58d4185e JB |
1203 | hdr = (struct ieee80211_hdr *) skb->data; |
1204 | ||
7c10770f JB |
1205 | if (likely(sta)) { |
1206 | if (!IS_ERR(sta)) | |
1207 | tx->sta = sta; | |
1208 | } else { | |
1209 | if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) { | |
1210 | tx->sta = rcu_dereference(sdata->u.vlan.sta); | |
1211 | if (!tx->sta && sdata->wdev.use_4addr) | |
1212 | return TX_DROP; | |
10cb8e61 | 1213 | } else if (tx->sdata->control_port_protocol == tx->skb->protocol) { |
7c10770f JB |
1214 | tx->sta = sta_info_get_bss(sdata, hdr->addr1); |
1215 | } | |
1a791550 | 1216 | if (!tx->sta && !is_multicast_ether_addr(hdr->addr1)) { |
7c10770f | 1217 | tx->sta = sta_info_get(sdata, hdr->addr1); |
1a791550 FF |
1218 | aggr_check = true; |
1219 | } | |
3f0e0b22 | 1220 | } |
58d4185e | 1221 | |
cd8ffc80 | 1222 | if (tx->sta && ieee80211_is_data_qos(hdr->frame_control) && |
49a59543 | 1223 | !ieee80211_is_qos_nullfunc(hdr->frame_control) && |
30686bf7 JB |
1224 | ieee80211_hw_check(&local->hw, AMPDU_AGGREGATION) && |
1225 | !ieee80211_hw_check(&local->hw, TX_AMPDU_SETUP_IN_HW)) { | |
cd8ffc80 JB |
1226 | struct tid_ampdu_tx *tid_tx; |
1227 | ||
a1f2ba04 | 1228 | tid = ieee80211_get_tid(hdr); |
a622ab72 | 1229 | tid_tx = rcu_dereference(tx->sta->ampdu_mlme.tid_tx[tid]); |
1a791550 FF |
1230 | if (!tid_tx && aggr_check) { |
1231 | ieee80211_aggr_check(sdata, tx->sta, skb); | |
1232 | tid_tx = rcu_dereference(tx->sta->ampdu_mlme.tid_tx[tid]); | |
1233 | } | |
1234 | ||
a622ab72 JB |
1235 | if (tid_tx) { |
1236 | bool queued; | |
cd8ffc80 | 1237 | |
a622ab72 JB |
1238 | queued = ieee80211_tx_prep_agg(tx, skb, info, |
1239 | tid_tx, tid); | |
1240 | ||
1241 | if (unlikely(queued)) | |
1242 | return TX_QUEUED; | |
1243 | } | |
8b30b1fe S |
1244 | } |
1245 | ||
badffb72 | 1246 | if (is_multicast_ether_addr(hdr->addr1)) { |
5cf121c3 | 1247 | tx->flags &= ~IEEE80211_TX_UNICAST; |
e039fa4a | 1248 | info->flags |= IEEE80211_TX_CTL_NO_ACK; |
6fd67e93 | 1249 | } else |
5cf121c3 | 1250 | tx->flags |= IEEE80211_TX_UNICAST; |
58d4185e | 1251 | |
a26eb27a JB |
1252 | if (!(info->flags & IEEE80211_TX_CTL_DONTFRAG)) { |
1253 | if (!(tx->flags & IEEE80211_TX_UNICAST) || | |
1254 | skb->len + FCS_LEN <= local->hw.wiphy->frag_threshold || | |
1255 | info->flags & IEEE80211_TX_CTL_AMPDU) | |
1256 | info->flags |= IEEE80211_TX_CTL_DONTFRAG; | |
58d4185e JB |
1257 | } |
1258 | ||
e2ebc74d | 1259 | if (!tx->sta) |
e039fa4a | 1260 | info->flags |= IEEE80211_TX_CTL_CLEAR_PS_FILT; |
f7418bc1 | 1261 | else if (test_and_clear_sta_flag(tx->sta, WLAN_STA_CLEAR_PS_FILT)) { |
e039fa4a | 1262 | info->flags |= IEEE80211_TX_CTL_CLEAR_PS_FILT; |
f7418bc1 FF |
1263 | ieee80211_check_fast_xmit(tx->sta); |
1264 | } | |
58d4185e | 1265 | |
e039fa4a | 1266 | info->flags |= IEEE80211_TX_CTL_FIRST_FRAGMENT; |
e2ebc74d | 1267 | |
9ae54c84 | 1268 | return TX_CONTINUE; |
e2ebc74d JB |
1269 | } |
1270 | ||
80a83cfc MK |
1271 | static struct txq_info *ieee80211_get_txq(struct ieee80211_local *local, |
1272 | struct ieee80211_vif *vif, | |
dbef5362 | 1273 | struct sta_info *sta, |
80a83cfc | 1274 | struct sk_buff *skb) |
ba8c3d6f FF |
1275 | { |
1276 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data; | |
ba8c3d6f | 1277 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); |
ba8c3d6f | 1278 | struct ieee80211_txq *txq = NULL; |
ba8c3d6f | 1279 | |
c3732a7b FF |
1280 | if ((info->flags & IEEE80211_TX_CTL_SEND_AFTER_DTIM) || |
1281 | (info->control.flags & IEEE80211_TX_CTRL_PS_RESPONSE)) | |
80a83cfc | 1282 | return NULL; |
ba8c3d6f | 1283 | |
cc20ff2c | 1284 | if (!(info->flags & IEEE80211_TX_CTL_HW_80211_ENCAP) && |
50ff477a | 1285 | unlikely(!ieee80211_is_data_present(hdr->frame_control))) { |
adf8ed01 | 1286 | if ((!ieee80211_is_mgmt(hdr->frame_control) || |
0eeb2b67 SS |
1287 | ieee80211_is_bufferable_mmpdu(hdr->frame_control) || |
1288 | vif->type == NL80211_IFTYPE_STATION) && | |
adf8ed01 JB |
1289 | sta && sta->uploaded) { |
1290 | /* | |
1291 | * This will be NULL if the driver didn't set the | |
1292 | * opt-in hardware flag. | |
1293 | */ | |
1294 | txq = sta->sta.txq[IEEE80211_NUM_TIDS]; | |
1295 | } | |
1296 | } else if (sta) { | |
ba8c3d6f FF |
1297 | u8 tid = skb->priority & IEEE80211_QOS_CTL_TID_MASK; |
1298 | ||
dbef5362 MK |
1299 | if (!sta->uploaded) |
1300 | return NULL; | |
1301 | ||
1302 | txq = sta->sta.txq[tid]; | |
ba8c3d6f FF |
1303 | } else if (vif) { |
1304 | txq = vif->txq; | |
1305 | } | |
1306 | ||
1307 | if (!txq) | |
80a83cfc | 1308 | return NULL; |
ba8c3d6f | 1309 | |
80a83cfc MK |
1310 | return to_txq_info(txq); |
1311 | } | |
ba8c3d6f | 1312 | |
5caa328e MK |
1313 | static void ieee80211_set_skb_enqueue_time(struct sk_buff *skb) |
1314 | { | |
1315 | IEEE80211_SKB_CB(skb)->control.enqueue_time = codel_get_time(); | |
1316 | } | |
1317 | ||
5caa328e MK |
1318 | static u32 codel_skb_len_func(const struct sk_buff *skb) |
1319 | { | |
1320 | return skb->len; | |
1321 | } | |
1322 | ||
1323 | static codel_time_t codel_skb_time_func(const struct sk_buff *skb) | |
1324 | { | |
1325 | const struct ieee80211_tx_info *info; | |
1326 | ||
1327 | info = (const struct ieee80211_tx_info *)skb->cb; | |
1328 | return info->control.enqueue_time; | |
1329 | } | |
1330 | ||
1331 | static struct sk_buff *codel_dequeue_func(struct codel_vars *cvars, | |
1332 | void *ctx) | |
1333 | { | |
1334 | struct ieee80211_local *local; | |
1335 | struct txq_info *txqi; | |
1336 | struct fq *fq; | |
1337 | struct fq_flow *flow; | |
1338 | ||
1339 | txqi = ctx; | |
1340 | local = vif_to_sdata(txqi->txq.vif)->local; | |
1341 | fq = &local->fq; | |
1342 | ||
1343 | if (cvars == &txqi->def_cvars) | |
bf9009bf | 1344 | flow = &txqi->tin.default_flow; |
5caa328e MK |
1345 | else |
1346 | flow = &fq->flows[cvars - local->cvars]; | |
1347 | ||
1348 | return fq_flow_dequeue(fq, flow); | |
1349 | } | |
1350 | ||
1351 | static void codel_drop_func(struct sk_buff *skb, | |
1352 | void *ctx) | |
1353 | { | |
1354 | struct ieee80211_local *local; | |
1355 | struct ieee80211_hw *hw; | |
1356 | struct txq_info *txqi; | |
1357 | ||
1358 | txqi = ctx; | |
1359 | local = vif_to_sdata(txqi->txq.vif)->local; | |
1360 | hw = &local->hw; | |
1361 | ||
1362 | ieee80211_free_txskb(hw, skb); | |
1363 | } | |
1364 | ||
fa962b92 MK |
1365 | static struct sk_buff *fq_tin_dequeue_func(struct fq *fq, |
1366 | struct fq_tin *tin, | |
1367 | struct fq_flow *flow) | |
1368 | { | |
5caa328e MK |
1369 | struct ieee80211_local *local; |
1370 | struct txq_info *txqi; | |
1371 | struct codel_vars *cvars; | |
1372 | struct codel_params *cparams; | |
1373 | struct codel_stats *cstats; | |
1374 | ||
1375 | local = container_of(fq, struct ieee80211_local, fq); | |
1376 | txqi = container_of(tin, struct txq_info, tin); | |
8d51dbb8 | 1377 | cstats = &txqi->cstats; |
5caa328e | 1378 | |
484a54c2 THJ |
1379 | if (txqi->txq.sta) { |
1380 | struct sta_info *sta = container_of(txqi->txq.sta, | |
1381 | struct sta_info, sta); | |
1382 | cparams = &sta->cparams; | |
1383 | } else { | |
1384 | cparams = &local->cparams; | |
1385 | } | |
1386 | ||
bf9009bf | 1387 | if (flow == &tin->default_flow) |
5caa328e MK |
1388 | cvars = &txqi->def_cvars; |
1389 | else | |
1390 | cvars = &local->cvars[flow - fq->flows]; | |
1391 | ||
1392 | return codel_dequeue(txqi, | |
1393 | &flow->backlog, | |
1394 | cparams, | |
1395 | cvars, | |
1396 | cstats, | |
1397 | codel_skb_len_func, | |
1398 | codel_skb_time_func, | |
1399 | codel_drop_func, | |
1400 | codel_dequeue_func); | |
fa962b92 MK |
1401 | } |
1402 | ||
1403 | static void fq_skb_free_func(struct fq *fq, | |
1404 | struct fq_tin *tin, | |
1405 | struct fq_flow *flow, | |
1406 | struct sk_buff *skb) | |
1407 | { | |
1408 | struct ieee80211_local *local; | |
1409 | ||
1410 | local = container_of(fq, struct ieee80211_local, fq); | |
1411 | ieee80211_free_txskb(&local->hw, skb); | |
1412 | } | |
1413 | ||
80a83cfc MK |
1414 | static void ieee80211_txq_enqueue(struct ieee80211_local *local, |
1415 | struct txq_info *txqi, | |
1416 | struct sk_buff *skb) | |
1417 | { | |
fa962b92 MK |
1418 | struct fq *fq = &local->fq; |
1419 | struct fq_tin *tin = &txqi->tin; | |
f2af2df8 | 1420 | u32 flow_idx = fq_flow_idx(fq, skb); |
f2ac7e30 | 1421 | |
5caa328e | 1422 | ieee80211_set_skb_enqueue_time(skb); |
f2af2df8 FF |
1423 | |
1424 | spin_lock_bh(&fq->lock); | |
73bc9e0a JB |
1425 | /* |
1426 | * For management frames, don't really apply codel etc., | |
1427 | * we don't want to apply any shaping or anything we just | |
1428 | * want to simplify the driver API by having them on the | |
1429 | * txqi. | |
1430 | */ | |
ca47b462 JB |
1431 | if (unlikely(txqi->txq.tid == IEEE80211_NUM_TIDS)) { |
1432 | IEEE80211_SKB_CB(skb)->control.flags |= | |
1433 | IEEE80211_TX_INTCFL_NEED_TXPROCESSING; | |
73bc9e0a | 1434 | __skb_queue_tail(&txqi->frags, skb); |
ca47b462 | 1435 | } else { |
73bc9e0a JB |
1436 | fq_tin_enqueue(fq, tin, flow_idx, skb, |
1437 | fq_skb_free_func); | |
ca47b462 | 1438 | } |
f2af2df8 | 1439 | spin_unlock_bh(&fq->lock); |
fa962b92 | 1440 | } |
ba8c3d6f | 1441 | |
2a9e2579 JB |
1442 | static bool fq_vlan_filter_func(struct fq *fq, struct fq_tin *tin, |
1443 | struct fq_flow *flow, struct sk_buff *skb, | |
1444 | void *data) | |
1445 | { | |
1446 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); | |
1447 | ||
1448 | return info->control.vif == data; | |
1449 | } | |
1450 | ||
1451 | void ieee80211_txq_remove_vlan(struct ieee80211_local *local, | |
1452 | struct ieee80211_sub_if_data *sdata) | |
1453 | { | |
1454 | struct fq *fq = &local->fq; | |
1455 | struct txq_info *txqi; | |
1456 | struct fq_tin *tin; | |
1457 | struct ieee80211_sub_if_data *ap; | |
1458 | ||
1459 | if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_AP_VLAN)) | |
1460 | return; | |
1461 | ||
1462 | ap = container_of(sdata->bss, struct ieee80211_sub_if_data, u.ap); | |
1463 | ||
1464 | if (!ap->vif.txq) | |
1465 | return; | |
1466 | ||
1467 | txqi = to_txq_info(ap->vif.txq); | |
1468 | tin = &txqi->tin; | |
1469 | ||
1470 | spin_lock_bh(&fq->lock); | |
1471 | fq_tin_filter(fq, tin, fq_vlan_filter_func, &sdata->vif, | |
1472 | fq_skb_free_func); | |
1473 | spin_unlock_bh(&fq->lock); | |
1474 | } | |
1475 | ||
fa962b92 MK |
1476 | void ieee80211_txq_init(struct ieee80211_sub_if_data *sdata, |
1477 | struct sta_info *sta, | |
1478 | struct txq_info *txqi, int tid) | |
1479 | { | |
1480 | fq_tin_init(&txqi->tin); | |
5caa328e | 1481 | codel_vars_init(&txqi->def_cvars); |
8d51dbb8 | 1482 | codel_stats_init(&txqi->cstats); |
bb42f2d1 | 1483 | __skb_queue_head_init(&txqi->frags); |
2433647b | 1484 | RB_CLEAR_NODE(&txqi->schedule_order); |
fa962b92 MK |
1485 | |
1486 | txqi->txq.vif = &sdata->vif; | |
1487 | ||
adf8ed01 | 1488 | if (!sta) { |
fa962b92 MK |
1489 | sdata->vif.txq = &txqi->txq; |
1490 | txqi->txq.tid = 0; | |
1491 | txqi->txq.ac = IEEE80211_AC_BE; | |
adf8ed01 JB |
1492 | |
1493 | return; | |
80a83cfc | 1494 | } |
adf8ed01 JB |
1495 | |
1496 | if (tid == IEEE80211_NUM_TIDS) { | |
0eeb2b67 SS |
1497 | if (sdata->vif.type == NL80211_IFTYPE_STATION) { |
1498 | /* Drivers need to opt in to the management MPDU TXQ */ | |
1499 | if (!ieee80211_hw_check(&sdata->local->hw, | |
1500 | STA_MMPDU_TXQ)) | |
1501 | return; | |
1502 | } else if (!ieee80211_hw_check(&sdata->local->hw, | |
1503 | BUFF_MMPDU_TXQ)) { | |
1504 | /* Drivers need to opt in to the bufferable MMPDU TXQ */ | |
adf8ed01 | 1505 | return; |
0eeb2b67 | 1506 | } |
adf8ed01 JB |
1507 | txqi->txq.ac = IEEE80211_AC_VO; |
1508 | } else { | |
1509 | txqi->txq.ac = ieee80211_ac_from_tid(tid); | |
1510 | } | |
1511 | ||
1512 | txqi->txq.sta = &sta->sta; | |
1513 | txqi->txq.tid = tid; | |
1514 | sta->sta.txq[tid] = &txqi->txq; | |
fa962b92 | 1515 | } |
ba8c3d6f | 1516 | |
fa962b92 MK |
1517 | void ieee80211_txq_purge(struct ieee80211_local *local, |
1518 | struct txq_info *txqi) | |
1519 | { | |
1520 | struct fq *fq = &local->fq; | |
1521 | struct fq_tin *tin = &txqi->tin; | |
1522 | ||
b4809e94 | 1523 | spin_lock_bh(&fq->lock); |
fa962b92 | 1524 | fq_tin_reset(fq, tin, fq_skb_free_func); |
bb42f2d1 | 1525 | ieee80211_purge_tx_queue(&local->hw, &txqi->frags); |
b4809e94 THJ |
1526 | spin_unlock_bh(&fq->lock); |
1527 | ||
2433647b | 1528 | ieee80211_unschedule_txq(&local->hw, &txqi->txq, true); |
fa962b92 MK |
1529 | } |
1530 | ||
2fe4a29a THJ |
1531 | void ieee80211_txq_set_params(struct ieee80211_local *local) |
1532 | { | |
1533 | if (local->hw.wiphy->txq_limit) | |
1534 | local->fq.limit = local->hw.wiphy->txq_limit; | |
1535 | else | |
1536 | local->hw.wiphy->txq_limit = local->fq.limit; | |
1537 | ||
1538 | if (local->hw.wiphy->txq_memory_limit) | |
1539 | local->fq.memory_limit = local->hw.wiphy->txq_memory_limit; | |
1540 | else | |
1541 | local->hw.wiphy->txq_memory_limit = local->fq.memory_limit; | |
1542 | ||
1543 | if (local->hw.wiphy->txq_quantum) | |
1544 | local->fq.quantum = local->hw.wiphy->txq_quantum; | |
1545 | else | |
1546 | local->hw.wiphy->txq_quantum = local->fq.quantum; | |
1547 | } | |
1548 | ||
fa962b92 MK |
1549 | int ieee80211_txq_setup_flows(struct ieee80211_local *local) |
1550 | { | |
1551 | struct fq *fq = &local->fq; | |
1552 | int ret; | |
5caa328e | 1553 | int i; |
3ff23cd5 THJ |
1554 | bool supp_vht = false; |
1555 | enum nl80211_band band; | |
fa962b92 MK |
1556 | |
1557 | if (!local->ops->wake_tx_queue) | |
1558 | return 0; | |
1559 | ||
1560 | ret = fq_init(fq, 4096); | |
1561 | if (ret) | |
1562 | return ret; | |
1563 | ||
3ff23cd5 THJ |
1564 | /* |
1565 | * If the hardware doesn't support VHT, it is safe to limit the maximum | |
1566 | * queue size. 4 Mbytes is 64 max-size aggregates in 802.11n. | |
1567 | */ | |
1568 | for (band = 0; band < NUM_NL80211_BANDS; band++) { | |
1569 | struct ieee80211_supported_band *sband; | |
1570 | ||
1571 | sband = local->hw.wiphy->bands[band]; | |
1572 | if (!sband) | |
1573 | continue; | |
1574 | ||
1575 | supp_vht = supp_vht || sband->vht_cap.vht_supported; | |
1576 | } | |
1577 | ||
1578 | if (!supp_vht) | |
1579 | fq->memory_limit = 4 << 20; /* 4 Mbytes */ | |
1580 | ||
5caa328e | 1581 | codel_params_init(&local->cparams); |
5caa328e MK |
1582 | local->cparams.interval = MS2TIME(100); |
1583 | local->cparams.target = MS2TIME(20); | |
1584 | local->cparams.ecn = true; | |
1585 | ||
1586 | local->cvars = kcalloc(fq->flows_cnt, sizeof(local->cvars[0]), | |
1587 | GFP_KERNEL); | |
1588 | if (!local->cvars) { | |
59a7c828 | 1589 | spin_lock_bh(&fq->lock); |
5caa328e | 1590 | fq_reset(fq, fq_skb_free_func); |
59a7c828 | 1591 | spin_unlock_bh(&fq->lock); |
5caa328e MK |
1592 | return -ENOMEM; |
1593 | } | |
1594 | ||
1595 | for (i = 0; i < fq->flows_cnt; i++) | |
1596 | codel_vars_init(&local->cvars[i]); | |
1597 | ||
2fe4a29a THJ |
1598 | ieee80211_txq_set_params(local); |
1599 | ||
fa962b92 MK |
1600 | return 0; |
1601 | } | |
1602 | ||
1603 | void ieee80211_txq_teardown_flows(struct ieee80211_local *local) | |
1604 | { | |
1605 | struct fq *fq = &local->fq; | |
1606 | ||
1607 | if (!local->ops->wake_tx_queue) | |
1608 | return; | |
1609 | ||
5caa328e MK |
1610 | kfree(local->cvars); |
1611 | local->cvars = NULL; | |
1612 | ||
59a7c828 | 1613 | spin_lock_bh(&fq->lock); |
fa962b92 | 1614 | fq_reset(fq, fq_skb_free_func); |
59a7c828 | 1615 | spin_unlock_bh(&fq->lock); |
ba8c3d6f FF |
1616 | } |
1617 | ||
bb42f2d1 THJ |
1618 | static bool ieee80211_queue_skb(struct ieee80211_local *local, |
1619 | struct ieee80211_sub_if_data *sdata, | |
1620 | struct sta_info *sta, | |
1621 | struct sk_buff *skb) | |
1622 | { | |
bb42f2d1 THJ |
1623 | struct ieee80211_vif *vif; |
1624 | struct txq_info *txqi; | |
bb42f2d1 THJ |
1625 | |
1626 | if (!local->ops->wake_tx_queue || | |
1627 | sdata->vif.type == NL80211_IFTYPE_MONITOR) | |
1628 | return false; | |
1629 | ||
bb42f2d1 THJ |
1630 | if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) |
1631 | sdata = container_of(sdata->bss, | |
1632 | struct ieee80211_sub_if_data, u.ap); | |
1633 | ||
1634 | vif = &sdata->vif; | |
dbef5362 | 1635 | txqi = ieee80211_get_txq(local, vif, sta, skb); |
bb42f2d1 THJ |
1636 | |
1637 | if (!txqi) | |
1638 | return false; | |
1639 | ||
bb42f2d1 | 1640 | ieee80211_txq_enqueue(local, txqi, skb); |
bb42f2d1 | 1641 | |
18667600 | 1642 | schedule_and_wake_txq(local, txqi); |
bb42f2d1 THJ |
1643 | |
1644 | return true; | |
1645 | } | |
1646 | ||
11127e91 JB |
1647 | static bool ieee80211_tx_frags(struct ieee80211_local *local, |
1648 | struct ieee80211_vif *vif, | |
4fd0328d | 1649 | struct sta_info *sta, |
11127e91 JB |
1650 | struct sk_buff_head *skbs, |
1651 | bool txpending) | |
e2ebc74d | 1652 | { |
80a83cfc | 1653 | struct ieee80211_tx_control control = {}; |
252b86c4 | 1654 | struct sk_buff *skb, *tmp; |
3b8d81e0 | 1655 | unsigned long flags; |
e2ebc74d | 1656 | |
252b86c4 | 1657 | skb_queue_walk_safe(skbs, skb, tmp) { |
3a25a8c8 JB |
1658 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); |
1659 | int q = info->hw_queue; | |
1660 | ||
1661 | #ifdef CONFIG_MAC80211_VERBOSE_DEBUG | |
1662 | if (WARN_ON_ONCE(q >= local->hw.queues)) { | |
1663 | __skb_unlink(skb, skbs); | |
c3e7724b | 1664 | ieee80211_free_txskb(&local->hw, skb); |
3a25a8c8 JB |
1665 | continue; |
1666 | } | |
1667 | #endif | |
3b8d81e0 JB |
1668 | |
1669 | spin_lock_irqsave(&local->queue_stop_reason_lock, flags); | |
3b8d81e0 | 1670 | if (local->queue_stop_reasons[q] || |
7bb45683 | 1671 | (!txpending && !skb_queue_empty(&local->pending[q]))) { |
6c17b77b | 1672 | if (unlikely(info->flags & |
a7679ed5 SF |
1673 | IEEE80211_TX_INTFL_OFFCHAN_TX_OK)) { |
1674 | if (local->queue_stop_reasons[q] & | |
1675 | ~BIT(IEEE80211_QUEUE_STOP_REASON_OFFCHANNEL)) { | |
1676 | /* | |
1677 | * Drop off-channel frames if queues | |
1678 | * are stopped for any reason other | |
1679 | * than off-channel operation. Never | |
1680 | * queue them. | |
1681 | */ | |
1682 | spin_unlock_irqrestore( | |
1683 | &local->queue_stop_reason_lock, | |
1684 | flags); | |
1685 | ieee80211_purge_tx_queue(&local->hw, | |
1686 | skbs); | |
1687 | return true; | |
1688 | } | |
1689 | } else { | |
1690 | ||
6c17b77b | 1691 | /* |
a7679ed5 SF |
1692 | * Since queue is stopped, queue up frames for |
1693 | * later transmission from the tx-pending | |
1694 | * tasklet when the queue is woken again. | |
6c17b77b | 1695 | */ |
a7679ed5 SF |
1696 | if (txpending) |
1697 | skb_queue_splice_init(skbs, | |
1698 | &local->pending[q]); | |
1699 | else | |
1700 | skb_queue_splice_tail_init(skbs, | |
1701 | &local->pending[q]); | |
1702 | ||
1703 | spin_unlock_irqrestore(&local->queue_stop_reason_lock, | |
1704 | flags); | |
1705 | return false; | |
6c17b77b | 1706 | } |
7bb45683 | 1707 | } |
3b8d81e0 | 1708 | spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); |
f8e79ddd | 1709 | |
11127e91 | 1710 | info->control.vif = vif; |
4fd0328d | 1711 | control.sta = sta ? &sta->sta : NULL; |
f0e72851 | 1712 | |
11127e91 | 1713 | __skb_unlink(skb, skbs); |
80a83cfc | 1714 | drv_tx(local, &control, skb); |
11127e91 | 1715 | } |
5061b0c2 | 1716 | |
11127e91 JB |
1717 | return true; |
1718 | } | |
1719 | ||
1720 | /* | |
1721 | * Returns false if the frame couldn't be transmitted but was queued instead. | |
1722 | */ | |
1723 | static bool __ieee80211_tx(struct ieee80211_local *local, | |
30f6cf96 FF |
1724 | struct sk_buff_head *skbs, struct sta_info *sta, |
1725 | bool txpending) | |
11127e91 JB |
1726 | { |
1727 | struct ieee80211_tx_info *info; | |
1728 | struct ieee80211_sub_if_data *sdata; | |
1729 | struct ieee80211_vif *vif; | |
11127e91 | 1730 | struct sk_buff *skb; |
958574cb | 1731 | bool result; |
5061b0c2 | 1732 | |
11127e91 JB |
1733 | if (WARN_ON(skb_queue_empty(skbs))) |
1734 | return true; | |
ec25acc4 | 1735 | |
11127e91 | 1736 | skb = skb_peek(skbs); |
11127e91 JB |
1737 | info = IEEE80211_SKB_CB(skb); |
1738 | sdata = vif_to_sdata(info->control.vif); | |
1739 | if (sta && !sta->uploaded) | |
1740 | sta = NULL; | |
1741 | ||
11127e91 JB |
1742 | switch (sdata->vif.type) { |
1743 | case NL80211_IFTYPE_MONITOR: | |
d8212184 | 1744 | if (sdata->u.mntr.flags & MONITOR_FLAG_ACTIVE) { |
c82b5a74 JB |
1745 | vif = &sdata->vif; |
1746 | break; | |
1747 | } | |
4b6f1dd6 | 1748 | sdata = rcu_dereference(local->monitor_sdata); |
3a25a8c8 | 1749 | if (sdata) { |
4b6f1dd6 | 1750 | vif = &sdata->vif; |
3a25a8c8 JB |
1751 | info->hw_queue = |
1752 | vif->hw_queue[skb_get_queue_mapping(skb)]; | |
30686bf7 | 1753 | } else if (ieee80211_hw_check(&local->hw, QUEUE_CONTROL)) { |
63b4d8b3 | 1754 | ieee80211_purge_tx_queue(&local->hw, skbs); |
3a25a8c8 JB |
1755 | return true; |
1756 | } else | |
4b6f1dd6 | 1757 | vif = NULL; |
11127e91 JB |
1758 | break; |
1759 | case NL80211_IFTYPE_AP_VLAN: | |
1760 | sdata = container_of(sdata->bss, | |
1761 | struct ieee80211_sub_if_data, u.ap); | |
fc0561dc | 1762 | fallthrough; |
11127e91 JB |
1763 | default: |
1764 | vif = &sdata->vif; | |
1765 | break; | |
e2ebc74d | 1766 | } |
2de8e0d9 | 1767 | |
4fd0328d | 1768 | result = ieee80211_tx_frags(local, vif, sta, skbs, txpending); |
11127e91 | 1769 | |
4db4e0a1 | 1770 | WARN_ON_ONCE(!skb_queue_empty(skbs)); |
252b86c4 | 1771 | |
11127e91 | 1772 | return result; |
e2ebc74d JB |
1773 | } |
1774 | ||
97b045d6 JB |
1775 | /* |
1776 | * Invoke TX handlers, return 0 on success and non-zero if the | |
1777 | * frame was dropped or queued. | |
bb42f2d1 THJ |
1778 | * |
1779 | * The handlers are split into an early and late part. The latter is everything | |
1780 | * that can be sensitive to reordering, and will be deferred to after packets | |
1781 | * are dequeued from the intermediate queues (when they are enabled). | |
97b045d6 | 1782 | */ |
bb42f2d1 | 1783 | static int invoke_tx_handlers_early(struct ieee80211_tx_data *tx) |
97b045d6 | 1784 | { |
97b045d6 | 1785 | ieee80211_tx_result res = TX_DROP; |
97b045d6 | 1786 | |
9aa4aee3 JB |
1787 | #define CALL_TXH(txh) \ |
1788 | do { \ | |
1789 | res = txh(tx); \ | |
1790 | if (res != TX_CONTINUE) \ | |
1791 | goto txh_done; \ | |
1792 | } while (0) | |
1793 | ||
5c1b98a5 | 1794 | CALL_TXH(ieee80211_tx_h_dynamic_ps); |
9aa4aee3 JB |
1795 | CALL_TXH(ieee80211_tx_h_check_assoc); |
1796 | CALL_TXH(ieee80211_tx_h_ps_buf); | |
a621fa4d | 1797 | CALL_TXH(ieee80211_tx_h_check_control_port_protocol); |
9aa4aee3 | 1798 | CALL_TXH(ieee80211_tx_h_select_key); |
c6fcf6bc | 1799 | |
bb42f2d1 THJ |
1800 | txh_done: |
1801 | if (unlikely(res == TX_DROP)) { | |
1802 | I802_DEBUG_INC(tx->local->tx_handlers_drop); | |
1803 | if (tx->skb) | |
1804 | ieee80211_free_txskb(&tx->local->hw, tx->skb); | |
1805 | else | |
1806 | ieee80211_purge_tx_queue(&tx->local->hw, &tx->skbs); | |
1807 | return -1; | |
1808 | } else if (unlikely(res == TX_QUEUED)) { | |
1809 | I802_DEBUG_INC(tx->local->tx_handlers_queued); | |
1810 | return -1; | |
1811 | } | |
1812 | ||
1813 | return 0; | |
1814 | } | |
1815 | ||
1816 | /* | |
1817 | * Late handlers can be called while the sta lock is held. Handlers that can | |
1818 | * cause packets to be generated will cause deadlock! | |
1819 | */ | |
1820 | static int invoke_tx_handlers_late(struct ieee80211_tx_data *tx) | |
1821 | { | |
1822 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx->skb); | |
1823 | ieee80211_tx_result res = TX_CONTINUE; | |
1824 | ||
18688c80 FF |
1825 | if (!ieee80211_hw_check(&tx->local->hw, HAS_RATE_CONTROL)) |
1826 | CALL_TXH(ieee80211_tx_h_rate_ctrl); | |
1827 | ||
aa5b5492 JB |
1828 | if (unlikely(info->flags & IEEE80211_TX_INTFL_RETRANSMISSION)) { |
1829 | __skb_queue_tail(&tx->skbs, tx->skb); | |
1830 | tx->skb = NULL; | |
c6fcf6bc | 1831 | goto txh_done; |
aa5b5492 | 1832 | } |
c6fcf6bc JB |
1833 | |
1834 | CALL_TXH(ieee80211_tx_h_michael_mic_add); | |
9aa4aee3 JB |
1835 | CALL_TXH(ieee80211_tx_h_sequence); |
1836 | CALL_TXH(ieee80211_tx_h_fragment); | |
d9e8a70f | 1837 | /* handlers after fragment must be aware of tx info fragmentation! */ |
9aa4aee3 JB |
1838 | CALL_TXH(ieee80211_tx_h_stats); |
1839 | CALL_TXH(ieee80211_tx_h_encrypt); | |
30686bf7 | 1840 | if (!ieee80211_hw_check(&tx->local->hw, HAS_RATE_CONTROL)) |
8fd369ee | 1841 | CALL_TXH(ieee80211_tx_h_calculate_duration); |
d9e8a70f | 1842 | #undef CALL_TXH |
97b045d6 | 1843 | |
d9e8a70f | 1844 | txh_done: |
97b045d6 | 1845 | if (unlikely(res == TX_DROP)) { |
5479d0e7 | 1846 | I802_DEBUG_INC(tx->local->tx_handlers_drop); |
252b86c4 | 1847 | if (tx->skb) |
c3e7724b | 1848 | ieee80211_free_txskb(&tx->local->hw, tx->skb); |
252b86c4 | 1849 | else |
1f98ab7f | 1850 | ieee80211_purge_tx_queue(&tx->local->hw, &tx->skbs); |
97b045d6 JB |
1851 | return -1; |
1852 | } else if (unlikely(res == TX_QUEUED)) { | |
5479d0e7 | 1853 | I802_DEBUG_INC(tx->local->tx_handlers_queued); |
97b045d6 JB |
1854 | return -1; |
1855 | } | |
1856 | ||
1857 | return 0; | |
1858 | } | |
1859 | ||
bb42f2d1 THJ |
1860 | static int invoke_tx_handlers(struct ieee80211_tx_data *tx) |
1861 | { | |
1862 | int r = invoke_tx_handlers_early(tx); | |
1863 | ||
1864 | if (r) | |
1865 | return r; | |
1866 | return invoke_tx_handlers_late(tx); | |
1867 | } | |
1868 | ||
06be6b14 FF |
1869 | bool ieee80211_tx_prepare_skb(struct ieee80211_hw *hw, |
1870 | struct ieee80211_vif *vif, struct sk_buff *skb, | |
1871 | int band, struct ieee80211_sta **sta) | |
1872 | { | |
1873 | struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); | |
1874 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); | |
1875 | struct ieee80211_tx_data tx; | |
88724a81 | 1876 | struct sk_buff *skb2; |
06be6b14 | 1877 | |
7c10770f | 1878 | if (ieee80211_tx_prepare(sdata, &tx, NULL, skb) == TX_DROP) |
06be6b14 FF |
1879 | return false; |
1880 | ||
1881 | info->band = band; | |
1882 | info->control.vif = vif; | |
1883 | info->hw_queue = vif->hw_queue[skb_get_queue_mapping(skb)]; | |
1884 | ||
1885 | if (invoke_tx_handlers(&tx)) | |
1886 | return false; | |
1887 | ||
1888 | if (sta) { | |
1889 | if (tx.sta) | |
1890 | *sta = &tx.sta->sta; | |
1891 | else | |
1892 | *sta = NULL; | |
1893 | } | |
1894 | ||
88724a81 JB |
1895 | /* this function isn't suitable for fragmented data frames */ |
1896 | skb2 = __skb_dequeue(&tx.skbs); | |
1897 | if (WARN_ON(skb2 != skb || !skb_queue_empty(&tx.skbs))) { | |
1898 | ieee80211_free_txskb(hw, skb2); | |
1899 | ieee80211_purge_tx_queue(hw, &tx.skbs); | |
1900 | return false; | |
1901 | } | |
1902 | ||
06be6b14 FF |
1903 | return true; |
1904 | } | |
1905 | EXPORT_SYMBOL(ieee80211_tx_prepare_skb); | |
1906 | ||
7bb45683 JB |
1907 | /* |
1908 | * Returns false if the frame couldn't be transmitted but was queued instead. | |
1909 | */ | |
1910 | static bool ieee80211_tx(struct ieee80211_sub_if_data *sdata, | |
7c10770f | 1911 | struct sta_info *sta, struct sk_buff *skb, |
08aca29a | 1912 | bool txpending) |
e2ebc74d | 1913 | { |
3b8d81e0 | 1914 | struct ieee80211_local *local = sdata->local; |
5cf121c3 | 1915 | struct ieee80211_tx_data tx; |
97b045d6 | 1916 | ieee80211_tx_result res_prepare; |
e039fa4a | 1917 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); |
7bb45683 | 1918 | bool result = true; |
e2ebc74d | 1919 | |
e2ebc74d JB |
1920 | if (unlikely(skb->len < 10)) { |
1921 | dev_kfree_skb(skb); | |
7bb45683 | 1922 | return true; |
e2ebc74d JB |
1923 | } |
1924 | ||
58d4185e | 1925 | /* initialises tx */ |
7c10770f | 1926 | res_prepare = ieee80211_tx_prepare(sdata, &tx, sta, skb); |
e2ebc74d | 1927 | |
cd8ffc80 | 1928 | if (unlikely(res_prepare == TX_DROP)) { |
c3e7724b | 1929 | ieee80211_free_txskb(&local->hw, skb); |
55de908a | 1930 | return true; |
cd8ffc80 | 1931 | } else if (unlikely(res_prepare == TX_QUEUED)) { |
55de908a | 1932 | return true; |
e2ebc74d JB |
1933 | } |
1934 | ||
3a25a8c8 JB |
1935 | /* set up hw_queue value early */ |
1936 | if (!(info->flags & IEEE80211_TX_CTL_TX_OFFCHAN) || | |
30686bf7 | 1937 | !ieee80211_hw_check(&local->hw, QUEUE_CONTROL)) |
3a25a8c8 JB |
1938 | info->hw_queue = |
1939 | sdata->vif.hw_queue[skb_get_queue_mapping(skb)]; | |
1940 | ||
bb42f2d1 | 1941 | if (invoke_tx_handlers_early(&tx)) |
6eae4a6c | 1942 | return true; |
bb42f2d1 THJ |
1943 | |
1944 | if (ieee80211_queue_skb(local, sdata, tx.sta, tx.skb)) | |
1945 | return true; | |
1946 | ||
1947 | if (!invoke_tx_handlers_late(&tx)) | |
30f6cf96 | 1948 | result = __ieee80211_tx(local, &tx.skbs, tx.sta, txpending); |
55de908a | 1949 | |
7bb45683 | 1950 | return result; |
e2ebc74d JB |
1951 | } |
1952 | ||
1953 | /* device xmit handlers */ | |
1954 | ||
14f46c1e JB |
1955 | enum ieee80211_encrypt { |
1956 | ENCRYPT_NO, | |
1957 | ENCRYPT_MGMT, | |
1958 | ENCRYPT_DATA, | |
1959 | }; | |
1960 | ||
3bff1865 | 1961 | static int ieee80211_skb_resize(struct ieee80211_sub_if_data *sdata, |
23c0752a | 1962 | struct sk_buff *skb, |
14f46c1e JB |
1963 | int head_need, |
1964 | enum ieee80211_encrypt encrypt) | |
23c0752a | 1965 | { |
3bff1865 | 1966 | struct ieee80211_local *local = sdata->local; |
9d0f50b8 | 1967 | bool enc_tailroom; |
23c0752a JB |
1968 | int tail_need = 0; |
1969 | ||
14f46c1e JB |
1970 | enc_tailroom = encrypt == ENCRYPT_MGMT || |
1971 | (encrypt == ENCRYPT_DATA && | |
1972 | sdata->crypto_tx_tailroom_needed_cnt); | |
9d0f50b8 FF |
1973 | |
1974 | if (enc_tailroom) { | |
23c0752a JB |
1975 | tail_need = IEEE80211_ENCRYPT_TAILROOM; |
1976 | tail_need -= skb_tailroom(skb); | |
1977 | tail_need = max_t(int, tail_need, 0); | |
1978 | } | |
1979 | ||
c70f59a2 | 1980 | if (skb_cloned(skb) && |
30686bf7 | 1981 | (!ieee80211_hw_check(&local->hw, SUPPORTS_CLONED_SKBS) || |
9d0f50b8 | 1982 | !skb_clone_writable(skb, ETH_HLEN) || enc_tailroom)) |
23c0752a | 1983 | I802_DEBUG_INC(local->tx_expand_skb_head_cloned); |
4cd06a34 | 1984 | else if (head_need || tail_need) |
23c0752a | 1985 | I802_DEBUG_INC(local->tx_expand_skb_head); |
4cd06a34 FF |
1986 | else |
1987 | return 0; | |
23c0752a JB |
1988 | |
1989 | if (pskb_expand_head(skb, head_need, tail_need, GFP_ATOMIC)) { | |
0fb9a9ec JP |
1990 | wiphy_debug(local->hw.wiphy, |
1991 | "failed to reallocate TX buffer\n"); | |
23c0752a JB |
1992 | return -ENOMEM; |
1993 | } | |
1994 | ||
23c0752a JB |
1995 | return 0; |
1996 | } | |
1997 | ||
7c10770f | 1998 | void ieee80211_xmit(struct ieee80211_sub_if_data *sdata, |
08aca29a | 1999 | struct sta_info *sta, struct sk_buff *skb) |
e2ebc74d | 2000 | { |
3b8d81e0 | 2001 | struct ieee80211_local *local = sdata->local; |
e039fa4a | 2002 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); |
14f46c1e | 2003 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data; |
e2ebc74d | 2004 | int headroom; |
14f46c1e | 2005 | enum ieee80211_encrypt encrypt; |
e2ebc74d | 2006 | |
14f46c1e JB |
2007 | if (info->flags & IEEE80211_TX_INTFL_DONT_ENCRYPT) |
2008 | encrypt = ENCRYPT_NO; | |
2009 | else if (ieee80211_is_mgmt(hdr->frame_control)) | |
2010 | encrypt = ENCRYPT_MGMT; | |
2011 | else | |
2012 | encrypt = ENCRYPT_DATA; | |
23c0752a | 2013 | |
3b8d81e0 | 2014 | headroom = local->tx_headroom; |
14f46c1e | 2015 | if (encrypt != ENCRYPT_NO) |
2475b1cc | 2016 | headroom += sdata->encrypt_headroom; |
23c0752a JB |
2017 | headroom -= skb_headroom(skb); |
2018 | headroom = max_t(int, 0, headroom); | |
2019 | ||
14f46c1e | 2020 | if (ieee80211_skb_resize(sdata, skb, headroom, encrypt)) { |
c3e7724b | 2021 | ieee80211_free_txskb(&local->hw, skb); |
3b8d81e0 | 2022 | return; |
e2ebc74d JB |
2023 | } |
2024 | ||
14f46c1e | 2025 | /* reload after potential resize */ |
740c1aa3 | 2026 | hdr = (struct ieee80211_hdr *) skb->data; |
5061b0c2 | 2027 | info->control.vif = &sdata->vif; |
e2ebc74d | 2028 | |
3f52b7e3 MP |
2029 | if (ieee80211_vif_is_mesh(&sdata->vif)) { |
2030 | if (ieee80211_is_data(hdr->frame_control) && | |
2031 | is_unicast_ether_addr(hdr->addr1)) { | |
bf7cd94d | 2032 | if (mesh_nexthop_resolve(sdata, skb)) |
3f52b7e3 MP |
2033 | return; /* skb queued: don't free */ |
2034 | } else { | |
2035 | ieee80211_mps_set_frame_flags(sdata, NULL, hdr); | |
2036 | } | |
98aed9fd | 2037 | } |
cca89496 | 2038 | |
2154c81c | 2039 | ieee80211_set_qos_hdr(sdata, skb); |
08aca29a | 2040 | ieee80211_tx(sdata, sta, skb, false); |
e2ebc74d JB |
2041 | } |
2042 | ||
bddc0c41 MV |
2043 | static bool ieee80211_validate_radiotap_len(struct sk_buff *skb) |
2044 | { | |
2045 | struct ieee80211_radiotap_header *rthdr = | |
2046 | (struct ieee80211_radiotap_header *)skb->data; | |
2047 | ||
2048 | /* check for not even having the fixed radiotap header part */ | |
2049 | if (unlikely(skb->len < sizeof(struct ieee80211_radiotap_header))) | |
2050 | return false; /* too short to be possibly valid */ | |
2051 | ||
2052 | /* is it a header version we can trust to find length from? */ | |
2053 | if (unlikely(rthdr->it_version)) | |
2054 | return false; /* only version 0 is supported */ | |
2055 | ||
2056 | /* does the skb contain enough to deliver on the alleged length? */ | |
2057 | if (unlikely(skb->len < ieee80211_get_radiotap_len(skb->data))) | |
2058 | return false; /* skb too short for claimed rt header extent */ | |
2059 | ||
2060 | return true; | |
2061 | } | |
2062 | ||
cb17ed29 MV |
2063 | bool ieee80211_parse_tx_radiotap(struct sk_buff *skb, |
2064 | struct net_device *dev) | |
73b9f03a | 2065 | { |
cb17ed29 | 2066 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); |
73b9f03a JB |
2067 | struct ieee80211_radiotap_iterator iterator; |
2068 | struct ieee80211_radiotap_header *rthdr = | |
2069 | (struct ieee80211_radiotap_header *) skb->data; | |
2070 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); | |
2071 | int ret = ieee80211_radiotap_iterator_init(&iterator, rthdr, skb->len, | |
2072 | NULL); | |
2073 | u16 txflags; | |
dfdfc2be SE |
2074 | u16 rate = 0; |
2075 | bool rate_found = false; | |
2076 | u8 rate_retries = 0; | |
2077 | u16 rate_flags = 0; | |
f66b60f6 | 2078 | u8 mcs_known, mcs_flags, mcs_bw; |
646e76bb LB |
2079 | u16 vht_known; |
2080 | u8 vht_mcs = 0, vht_nss = 0; | |
dfdfc2be | 2081 | int i; |
73b9f03a | 2082 | |
bddc0c41 MV |
2083 | if (!ieee80211_validate_radiotap_len(skb)) |
2084 | return false; | |
cb17ed29 | 2085 | |
73b9f03a JB |
2086 | info->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT | |
2087 | IEEE80211_TX_CTL_DONTFRAG; | |
2088 | ||
2089 | /* | |
2090 | * for every radiotap entry that is present | |
2091 | * (ieee80211_radiotap_iterator_next returns -ENOENT when no more | |
2092 | * entries present, or -EINVAL on error) | |
2093 | */ | |
2094 | ||
2095 | while (!ret) { | |
2096 | ret = ieee80211_radiotap_iterator_next(&iterator); | |
2097 | ||
2098 | if (ret) | |
2099 | continue; | |
2100 | ||
2101 | /* see if this argument is something we can use */ | |
2102 | switch (iterator.this_arg_index) { | |
2103 | /* | |
2104 | * You must take care when dereferencing iterator.this_arg | |
2105 | * for multibyte types... the pointer is not aligned. Use | |
2106 | * get_unaligned((type *)iterator.this_arg) to dereference | |
2107 | * iterator.this_arg for type "type" safely on all arches. | |
2108 | */ | |
2109 | case IEEE80211_RADIOTAP_FLAGS: | |
2110 | if (*iterator.this_arg & IEEE80211_RADIOTAP_F_FCS) { | |
2111 | /* | |
2112 | * this indicates that the skb we have been | |
2113 | * handed has the 32-bit FCS CRC at the end... | |
2114 | * we should react to that by snipping it off | |
2115 | * because it will be recomputed and added | |
2116 | * on transmission | |
2117 | */ | |
2118 | if (skb->len < (iterator._max_length + FCS_LEN)) | |
2119 | return false; | |
2120 | ||
2121 | skb_trim(skb, skb->len - FCS_LEN); | |
2122 | } | |
2123 | if (*iterator.this_arg & IEEE80211_RADIOTAP_F_WEP) | |
2124 | info->flags &= ~IEEE80211_TX_INTFL_DONT_ENCRYPT; | |
2125 | if (*iterator.this_arg & IEEE80211_RADIOTAP_F_FRAG) | |
2126 | info->flags &= ~IEEE80211_TX_CTL_DONTFRAG; | |
2127 | break; | |
2128 | ||
2129 | case IEEE80211_RADIOTAP_TX_FLAGS: | |
2130 | txflags = get_unaligned_le16(iterator.this_arg); | |
2131 | if (txflags & IEEE80211_RADIOTAP_F_TX_NOACK) | |
2132 | info->flags |= IEEE80211_TX_CTL_NO_ACK; | |
e02281e7 MV |
2133 | if (txflags & IEEE80211_RADIOTAP_F_TX_NOSEQNO) |
2134 | info->control.flags |= IEEE80211_TX_CTRL_NO_SEQNO; | |
30df8130 MV |
2135 | if (txflags & IEEE80211_RADIOTAP_F_TX_ORDER) |
2136 | info->control.flags |= | |
2137 | IEEE80211_TX_CTRL_DONT_REORDER; | |
73b9f03a JB |
2138 | break; |
2139 | ||
dfdfc2be SE |
2140 | case IEEE80211_RADIOTAP_RATE: |
2141 | rate = *iterator.this_arg; | |
2142 | rate_flags = 0; | |
2143 | rate_found = true; | |
2144 | break; | |
2145 | ||
2146 | case IEEE80211_RADIOTAP_DATA_RETRIES: | |
2147 | rate_retries = *iterator.this_arg; | |
2148 | break; | |
2149 | ||
2150 | case IEEE80211_RADIOTAP_MCS: | |
2151 | mcs_known = iterator.this_arg[0]; | |
2152 | mcs_flags = iterator.this_arg[1]; | |
2153 | if (!(mcs_known & IEEE80211_RADIOTAP_MCS_HAVE_MCS)) | |
2154 | break; | |
2155 | ||
2156 | rate_found = true; | |
2157 | rate = iterator.this_arg[2]; | |
2158 | rate_flags = IEEE80211_TX_RC_MCS; | |
2159 | ||
2160 | if (mcs_known & IEEE80211_RADIOTAP_MCS_HAVE_GI && | |
2161 | mcs_flags & IEEE80211_RADIOTAP_MCS_SGI) | |
2162 | rate_flags |= IEEE80211_TX_RC_SHORT_GI; | |
2163 | ||
f66b60f6 | 2164 | mcs_bw = mcs_flags & IEEE80211_RADIOTAP_MCS_BW_MASK; |
dfdfc2be | 2165 | if (mcs_known & IEEE80211_RADIOTAP_MCS_HAVE_BW && |
f66b60f6 | 2166 | mcs_bw == IEEE80211_RADIOTAP_MCS_BW_40) |
dfdfc2be | 2167 | rate_flags |= IEEE80211_TX_RC_40_MHZ_WIDTH; |
f1864e19 PB |
2168 | |
2169 | if (mcs_known & IEEE80211_RADIOTAP_MCS_HAVE_FEC && | |
2170 | mcs_flags & IEEE80211_RADIOTAP_MCS_FEC_LDPC) | |
2171 | info->flags |= IEEE80211_TX_CTL_LDPC; | |
549fdd34 PB |
2172 | |
2173 | if (mcs_known & IEEE80211_RADIOTAP_MCS_HAVE_STBC) { | |
2174 | u8 stbc = u8_get_bits(mcs_flags, | |
2175 | IEEE80211_RADIOTAP_MCS_STBC_MASK); | |
2176 | ||
2177 | info->flags |= | |
2178 | u32_encode_bits(stbc, | |
2179 | IEEE80211_TX_CTL_STBC); | |
2180 | } | |
dfdfc2be SE |
2181 | break; |
2182 | ||
646e76bb LB |
2183 | case IEEE80211_RADIOTAP_VHT: |
2184 | vht_known = get_unaligned_le16(iterator.this_arg); | |
2185 | rate_found = true; | |
2186 | ||
2187 | rate_flags = IEEE80211_TX_RC_VHT_MCS; | |
2188 | if ((vht_known & IEEE80211_RADIOTAP_VHT_KNOWN_GI) && | |
2189 | (iterator.this_arg[2] & | |
2190 | IEEE80211_RADIOTAP_VHT_FLAG_SGI)) | |
2191 | rate_flags |= IEEE80211_TX_RC_SHORT_GI; | |
2192 | if (vht_known & | |
2193 | IEEE80211_RADIOTAP_VHT_KNOWN_BANDWIDTH) { | |
2194 | if (iterator.this_arg[3] == 1) | |
2195 | rate_flags |= | |
2196 | IEEE80211_TX_RC_40_MHZ_WIDTH; | |
2197 | else if (iterator.this_arg[3] == 4) | |
2198 | rate_flags |= | |
2199 | IEEE80211_TX_RC_80_MHZ_WIDTH; | |
2200 | else if (iterator.this_arg[3] == 11) | |
2201 | rate_flags |= | |
2202 | IEEE80211_TX_RC_160_MHZ_WIDTH; | |
2203 | } | |
2204 | ||
2205 | vht_mcs = iterator.this_arg[4] >> 4; | |
13cb6d82 LB |
2206 | if (vht_mcs > 11) |
2207 | vht_mcs = 0; | |
646e76bb | 2208 | vht_nss = iterator.this_arg[4] & 0xF; |
13cb6d82 LB |
2209 | if (!vht_nss || vht_nss > 8) |
2210 | vht_nss = 1; | |
646e76bb LB |
2211 | break; |
2212 | ||
73b9f03a JB |
2213 | /* |
2214 | * Please update the file | |
429ff87b | 2215 | * Documentation/networking/mac80211-injection.rst |
73b9f03a JB |
2216 | * when parsing new fields here. |
2217 | */ | |
2218 | ||
2219 | default: | |
2220 | break; | |
2221 | } | |
2222 | } | |
2223 | ||
2224 | if (ret != -ENOENT) /* ie, if we didn't simply run out of fields */ | |
2225 | return false; | |
2226 | ||
dfdfc2be | 2227 | if (rate_found) { |
bddc0c41 MV |
2228 | struct ieee80211_supported_band *sband = |
2229 | local->hw.wiphy->bands[info->band]; | |
2230 | ||
dfdfc2be SE |
2231 | info->control.flags |= IEEE80211_TX_CTRL_RATE_INJECT; |
2232 | ||
2233 | for (i = 0; i < IEEE80211_TX_MAX_RATES; i++) { | |
2234 | info->control.rates[i].idx = -1; | |
2235 | info->control.rates[i].flags = 0; | |
2236 | info->control.rates[i].count = 0; | |
2237 | } | |
2238 | ||
2239 | if (rate_flags & IEEE80211_TX_RC_MCS) { | |
2240 | info->control.rates[0].idx = rate; | |
646e76bb LB |
2241 | } else if (rate_flags & IEEE80211_TX_RC_VHT_MCS) { |
2242 | ieee80211_rate_set_vht(info->control.rates, vht_mcs, | |
2243 | vht_nss); | |
bddc0c41 | 2244 | } else if (sband) { |
dfdfc2be SE |
2245 | for (i = 0; i < sband->n_bitrates; i++) { |
2246 | if (rate * 5 != sband->bitrates[i].bitrate) | |
2247 | continue; | |
2248 | ||
2249 | info->control.rates[0].idx = i; | |
2250 | break; | |
2251 | } | |
2252 | } | |
2253 | ||
07310a63 FF |
2254 | if (info->control.rates[0].idx < 0) |
2255 | info->control.flags &= ~IEEE80211_TX_CTRL_RATE_INJECT; | |
2256 | ||
dfdfc2be SE |
2257 | info->control.rates[0].flags = rate_flags; |
2258 | info->control.rates[0].count = min_t(u8, rate_retries + 1, | |
2259 | local->hw.max_rate_tries); | |
2260 | } | |
2261 | ||
73b9f03a JB |
2262 | return true; |
2263 | } | |
2264 | ||
d0cf9c0d SH |
2265 | netdev_tx_t ieee80211_monitor_start_xmit(struct sk_buff *skb, |
2266 | struct net_device *dev) | |
e2ebc74d JB |
2267 | { |
2268 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); | |
55de908a | 2269 | struct ieee80211_chanctx_conf *chanctx_conf; |
3b8d81e0 | 2270 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); |
f75f5c6f | 2271 | struct ieee80211_hdr *hdr; |
5d9cf4a5 | 2272 | struct ieee80211_sub_if_data *tmp_sdata, *sdata; |
b4932836 | 2273 | struct cfg80211_chan_def *chandef; |
9b8a74e3 | 2274 | u16 len_rthdr; |
5d9cf4a5 | 2275 | int hdrlen; |
e2ebc74d | 2276 | |
cb17ed29 MV |
2277 | memset(info, 0, sizeof(*info)); |
2278 | info->flags = IEEE80211_TX_CTL_REQ_TX_STATUS | | |
2279 | IEEE80211_TX_CTL_INJECTED; | |
9b8a74e3 | 2280 | |
bddc0c41 MV |
2281 | /* Sanity-check the length of the radiotap header */ |
2282 | if (!ieee80211_validate_radiotap_len(skb)) | |
cb17ed29 | 2283 | goto fail; |
9b8a74e3 | 2284 | |
cb17ed29 | 2285 | /* we now know there is a radiotap header with a length we can use */ |
9b8a74e3 AG |
2286 | len_rthdr = ieee80211_get_radiotap_len(skb->data); |
2287 | ||
e2ebc74d JB |
2288 | /* |
2289 | * fix up the pointers accounting for the radiotap | |
2290 | * header still being in there. We are being given | |
2291 | * a precooked IEEE80211 header so no need for | |
2292 | * normal processing | |
2293 | */ | |
9b8a74e3 | 2294 | skb_set_mac_header(skb, len_rthdr); |
e2ebc74d | 2295 | /* |
9b8a74e3 AG |
2296 | * these are just fixed to the end of the rt area since we |
2297 | * don't have any better information and at this point, nobody cares | |
e2ebc74d | 2298 | */ |
9b8a74e3 AG |
2299 | skb_set_network_header(skb, len_rthdr); |
2300 | skb_set_transport_header(skb, len_rthdr); | |
e2ebc74d | 2301 | |
5d9cf4a5 JB |
2302 | if (skb->len < len_rthdr + 2) |
2303 | goto fail; | |
2304 | ||
2305 | hdr = (struct ieee80211_hdr *)(skb->data + len_rthdr); | |
2306 | hdrlen = ieee80211_hdrlen(hdr->frame_control); | |
2307 | ||
2308 | if (skb->len < len_rthdr + hdrlen) | |
2309 | goto fail; | |
2310 | ||
f75f5c6f HS |
2311 | /* |
2312 | * Initialize skb->protocol if the injected frame is a data frame | |
2313 | * carrying a rfc1042 header | |
2314 | */ | |
5d9cf4a5 JB |
2315 | if (ieee80211_is_data(hdr->frame_control) && |
2316 | skb->len >= len_rthdr + hdrlen + sizeof(rfc1042_header) + 2) { | |
2317 | u8 *payload = (u8 *)hdr + hdrlen; | |
2318 | ||
b203ca39 | 2319 | if (ether_addr_equal(payload, rfc1042_header)) |
5d9cf4a5 JB |
2320 | skb->protocol = cpu_to_be16((payload[6] << 8) | |
2321 | payload[7]); | |
f75f5c6f HS |
2322 | } |
2323 | ||
5d9cf4a5 JB |
2324 | rcu_read_lock(); |
2325 | ||
2326 | /* | |
2327 | * We process outgoing injected frames that have a local address | |
2328 | * we handle as though they are non-injected frames. | |
2329 | * This code here isn't entirely correct, the local MAC address | |
2330 | * isn't always enough to find the interface to use; for proper | |
70d9c599 | 2331 | * VLAN support we have an nl80211-based mechanism. |
b226a826 JB |
2332 | * |
2333 | * This is necessary, for example, for old hostapd versions that | |
2334 | * don't use nl80211-based management TX/RX. | |
5d9cf4a5 JB |
2335 | */ |
2336 | sdata = IEEE80211_DEV_TO_SUB_IF(dev); | |
2337 | ||
2338 | list_for_each_entry_rcu(tmp_sdata, &local->interfaces, list) { | |
2339 | if (!ieee80211_sdata_running(tmp_sdata)) | |
2340 | continue; | |
2341 | if (tmp_sdata->vif.type == NL80211_IFTYPE_MONITOR || | |
70d9c599 | 2342 | tmp_sdata->vif.type == NL80211_IFTYPE_AP_VLAN) |
5d9cf4a5 | 2343 | continue; |
b203ca39 | 2344 | if (ether_addr_equal(tmp_sdata->vif.addr, hdr->addr2)) { |
5d9cf4a5 JB |
2345 | sdata = tmp_sdata; |
2346 | break; | |
2347 | } | |
2348 | } | |
7351c6bd | 2349 | |
55de908a JB |
2350 | chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf); |
2351 | if (!chanctx_conf) { | |
2352 | tmp_sdata = rcu_dereference(local->monitor_sdata); | |
2353 | if (tmp_sdata) | |
2354 | chanctx_conf = | |
2355 | rcu_dereference(tmp_sdata->vif.chanctx_conf); | |
2356 | } | |
55de908a | 2357 | |
b4a7ff75 | 2358 | if (chanctx_conf) |
b4932836 | 2359 | chandef = &chanctx_conf->def; |
b4a7ff75 | 2360 | else if (!local->use_chanctx) |
b4932836 | 2361 | chandef = &local->_oper_chandef; |
b4a7ff75 FF |
2362 | else |
2363 | goto fail_rcu; | |
55de908a JB |
2364 | |
2365 | /* | |
2366 | * Frame injection is not allowed if beaconing is not allowed | |
2367 | * or if we need radar detection. Beaconing is usually not allowed when | |
2368 | * the mode or operation (Adhoc, AP, Mesh) does not support DFS. | |
2369 | * Passive scan is also used in world regulatory domains where | |
2370 | * your country is not known and as such it should be treated as | |
2371 | * NO TX unless the channel is explicitly allowed in which case | |
2372 | * your current regulatory domain would not have the passive scan | |
2373 | * flag. | |
2374 | * | |
2375 | * Since AP mode uses monitor interfaces to inject/TX management | |
2376 | * frames we can make AP mode the exception to this rule once it | |
2377 | * supports radar detection as its implementation can deal with | |
2378 | * radar detection by itself. We can do that later by adding a | |
2379 | * monitor flag interfaces used for AP support. | |
2380 | */ | |
b4932836 JD |
2381 | if (!cfg80211_reg_can_beacon(local->hw.wiphy, chandef, |
2382 | sdata->vif.type)) | |
55de908a JB |
2383 | goto fail_rcu; |
2384 | ||
73c4e195 | 2385 | info->band = chandef->chan->band; |
109843b0 | 2386 | |
96a7109a JA |
2387 | /* Initialize skb->priority according to frame type and TID class, |
2388 | * with respect to the sub interface that the frame will actually | |
2389 | * be transmitted on. If the DONT_REORDER flag is set, the original | |
2390 | * skb-priority is preserved to assure frames injected with this | |
2391 | * flag are not reordered relative to each other. | |
2392 | */ | |
2393 | ieee80211_select_queue_80211(sdata, skb, hdr); | |
2394 | skb_set_queue_mapping(skb, ieee80211_ac_from_tid(skb->priority)); | |
2395 | ||
bddc0c41 MV |
2396 | /* |
2397 | * Process the radiotap header. This will now take into account the | |
2398 | * selected chandef above to accurately set injection rates and | |
2399 | * retransmissions. | |
2400 | */ | |
2401 | if (!ieee80211_parse_tx_radiotap(skb, dev)) | |
2402 | goto fail_rcu; | |
2403 | ||
cb17ed29 MV |
2404 | /* remove the injection radiotap header */ |
2405 | skb_pull(skb, len_rthdr); | |
109843b0 | 2406 | |
08aca29a | 2407 | ieee80211_xmit(sdata, NULL, skb); |
5d9cf4a5 JB |
2408 | rcu_read_unlock(); |
2409 | ||
e2ebc74d | 2410 | return NETDEV_TX_OK; |
9b8a74e3 | 2411 | |
55de908a JB |
2412 | fail_rcu: |
2413 | rcu_read_unlock(); | |
9b8a74e3 AG |
2414 | fail: |
2415 | dev_kfree_skb(skb); | |
2416 | return NETDEV_TX_OK; /* meaning, we dealt with the skb */ | |
e2ebc74d JB |
2417 | } |
2418 | ||
97ffe757 | 2419 | static inline bool ieee80211_is_tdls_setup(struct sk_buff *skb) |
ad38bfc9 | 2420 | { |
97ffe757 | 2421 | u16 ethertype = (skb->data[12] << 8) | skb->data[13]; |
ad38bfc9 | 2422 | |
97ffe757 JB |
2423 | return ethertype == ETH_P_TDLS && |
2424 | skb->len > 14 && | |
2425 | skb->data[14] == WLAN_TDLS_SNAP_RFTYPE; | |
2426 | } | |
2427 | ||
50ff477a JC |
2428 | int ieee80211_lookup_ra_sta(struct ieee80211_sub_if_data *sdata, |
2429 | struct sk_buff *skb, | |
2430 | struct sta_info **sta_out) | |
97ffe757 JB |
2431 | { |
2432 | struct sta_info *sta; | |
2433 | ||
2434 | switch (sdata->vif.type) { | |
2435 | case NL80211_IFTYPE_AP_VLAN: | |
2436 | sta = rcu_dereference(sdata->u.vlan.sta); | |
2437 | if (sta) { | |
2438 | *sta_out = sta; | |
2439 | return 0; | |
2440 | } else if (sdata->wdev.use_4addr) { | |
2441 | return -ENOLINK; | |
2442 | } | |
fc0561dc | 2443 | fallthrough; |
97ffe757 JB |
2444 | case NL80211_IFTYPE_AP: |
2445 | case NL80211_IFTYPE_OCB: | |
2446 | case NL80211_IFTYPE_ADHOC: | |
2447 | if (is_multicast_ether_addr(skb->data)) { | |
2448 | *sta_out = ERR_PTR(-ENOENT); | |
2449 | return 0; | |
2450 | } | |
2451 | sta = sta_info_get_bss(sdata, skb->data); | |
2452 | break; | |
97ffe757 JB |
2453 | #ifdef CONFIG_MAC80211_MESH |
2454 | case NL80211_IFTYPE_MESH_POINT: | |
2455 | /* determined much later */ | |
2456 | *sta_out = NULL; | |
2457 | return 0; | |
2458 | #endif | |
2459 | case NL80211_IFTYPE_STATION: | |
2460 | if (sdata->wdev.wiphy->flags & WIPHY_FLAG_SUPPORTS_TDLS) { | |
2461 | sta = sta_info_get(sdata, skb->data); | |
11d62caf JB |
2462 | if (sta && test_sta_flag(sta, WLAN_STA_TDLS_PEER)) { |
2463 | if (test_sta_flag(sta, | |
2464 | WLAN_STA_TDLS_PEER_AUTH)) { | |
97ffe757 JB |
2465 | *sta_out = sta; |
2466 | return 0; | |
2467 | } | |
2468 | ||
2469 | /* | |
2470 | * TDLS link during setup - throw out frames to | |
2471 | * peer. Allow TDLS-setup frames to unauthorized | |
2472 | * peers for the special case of a link teardown | |
2473 | * after a TDLS sta is removed due to being | |
2474 | * unreachable. | |
2475 | */ | |
11d62caf | 2476 | if (!ieee80211_is_tdls_setup(skb)) |
97ffe757 JB |
2477 | return -EINVAL; |
2478 | } | |
2479 | ||
2480 | } | |
2481 | ||
2482 | sta = sta_info_get(sdata, sdata->u.mgd.bssid); | |
2483 | if (!sta) | |
2484 | return -ENOLINK; | |
2485 | break; | |
2486 | default: | |
2487 | return -EINVAL; | |
2488 | } | |
2489 | ||
2490 | *sta_out = sta ?: ERR_PTR(-ENOENT); | |
2491 | return 0; | |
ad38bfc9 MG |
2492 | } |
2493 | ||
a7528198 | 2494 | static u16 ieee80211_store_ack_skb(struct ieee80211_local *local, |
5d8983c8 | 2495 | struct sk_buff *skb, |
a7528198 MT |
2496 | u32 *info_flags, |
2497 | u64 *cookie) | |
5d8983c8 | 2498 | { |
a7528198 | 2499 | struct sk_buff *ack_skb; |
5d8983c8 JC |
2500 | u16 info_id = 0; |
2501 | ||
a7528198 MT |
2502 | if (skb->sk) |
2503 | ack_skb = skb_clone_sk(skb); | |
2504 | else | |
2505 | ack_skb = skb_clone(skb, GFP_ATOMIC); | |
2506 | ||
5d8983c8 JC |
2507 | if (ack_skb) { |
2508 | unsigned long flags; | |
2509 | int id; | |
2510 | ||
2511 | spin_lock_irqsave(&local->ack_status_lock, flags); | |
2512 | id = idr_alloc(&local->ack_status_frames, ack_skb, | |
f2b18bac | 2513 | 1, 0x2000, GFP_ATOMIC); |
5d8983c8 JC |
2514 | spin_unlock_irqrestore(&local->ack_status_lock, flags); |
2515 | ||
2516 | if (id >= 0) { | |
2517 | info_id = id; | |
2518 | *info_flags |= IEEE80211_TX_CTL_REQ_TX_STATUS; | |
a7528198 MT |
2519 | if (cookie) { |
2520 | *cookie = ieee80211_mgmt_tx_cookie(local); | |
2521 | IEEE80211_SKB_CB(ack_skb)->ack.cookie = *cookie; | |
2522 | } | |
5d8983c8 JC |
2523 | } else { |
2524 | kfree_skb(ack_skb); | |
2525 | } | |
2526 | } | |
2527 | ||
2528 | return info_id; | |
2529 | } | |
2530 | ||
e2ebc74d | 2531 | /** |
4c9451ed JB |
2532 | * ieee80211_build_hdr - build 802.11 header in the given frame |
2533 | * @sdata: virtual interface to build the header for | |
2534 | * @skb: the skb to build the header in | |
24d342c5 | 2535 | * @info_flags: skb flags to set |
f0daf54f | 2536 | * @sta: the station pointer |
06016772 | 2537 | * @ctrl_flags: info control flags to set |
f0daf54f | 2538 | * @cookie: cookie pointer to fill (if not %NULL) |
e2ebc74d | 2539 | * |
4c9451ed JB |
2540 | * This function takes the skb with 802.3 header and reformats the header to |
2541 | * the appropriate IEEE 802.11 header based on which interface the packet is | |
2542 | * being transmitted on. | |
2543 | * | |
2544 | * Note that this function also takes care of the TX status request and | |
2545 | * potential unsharing of the SKB - this needs to be interleaved with the | |
2546 | * header building. | |
e2ebc74d | 2547 | * |
4c9451ed JB |
2548 | * The function requires the read-side RCU lock held |
2549 | * | |
2550 | * Returns: the (possibly reallocated) skb or an ERR_PTR() code | |
e2ebc74d | 2551 | */ |
4c9451ed | 2552 | static struct sk_buff *ieee80211_build_hdr(struct ieee80211_sub_if_data *sdata, |
7c10770f | 2553 | struct sk_buff *skb, u32 info_flags, |
a7528198 MT |
2554 | struct sta_info *sta, u32 ctrl_flags, |
2555 | u64 *cookie) | |
e2ebc74d | 2556 | { |
133b8226 | 2557 | struct ieee80211_local *local = sdata->local; |
489ee919 | 2558 | struct ieee80211_tx_info *info; |
dcf33963 | 2559 | int head_need; |
065e9605 HH |
2560 | u16 ethertype, hdrlen, meshhdrlen = 0; |
2561 | __le16 fc; | |
e2ebc74d | 2562 | struct ieee80211_hdr hdr; |
ff67bb86 | 2563 | struct ieee80211s_hdr mesh_hdr __maybe_unused; |
b8bacc18 | 2564 | struct mesh_path __maybe_unused *mppath = NULL, *mpath = NULL; |
e2ebc74d JB |
2565 | const u8 *encaps_data; |
2566 | int encaps_len, skip_header_bytes; | |
97ffe757 JB |
2567 | bool wme_sta = false, authorized = false; |
2568 | bool tdls_peer; | |
a729cff8 | 2569 | bool multicast; |
a729cff8 | 2570 | u16 info_id = 0; |
55de908a JB |
2571 | struct ieee80211_chanctx_conf *chanctx_conf; |
2572 | struct ieee80211_sub_if_data *ap_sdata; | |
57fbcce3 | 2573 | enum nl80211_band band; |
4c9451ed | 2574 | int ret; |
e2ebc74d | 2575 | |
97ffe757 JB |
2576 | if (IS_ERR(sta)) |
2577 | sta = NULL; | |
2578 | ||
276d9e82 JN |
2579 | #ifdef CONFIG_MAC80211_DEBUGFS |
2580 | if (local->force_tx_status) | |
2581 | info_flags |= IEEE80211_TX_CTL_REQ_TX_STATUS; | |
2582 | #endif | |
2583 | ||
e2ebc74d JB |
2584 | /* convert Ethernet header to proper 802.11 header (based on |
2585 | * operation mode) */ | |
2586 | ethertype = (skb->data[12] << 8) | skb->data[13]; | |
065e9605 | 2587 | fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_DATA); |
e2ebc74d | 2588 | |
51fb61e7 | 2589 | switch (sdata->vif.type) { |
05c914fe | 2590 | case NL80211_IFTYPE_AP_VLAN: |
97ffe757 | 2591 | if (sdata->wdev.use_4addr) { |
f14543ee FF |
2592 | fc |= cpu_to_le16(IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS); |
2593 | /* RA TA DA SA */ | |
2594 | memcpy(hdr.addr1, sta->sta.addr, ETH_ALEN); | |
47846c9b | 2595 | memcpy(hdr.addr2, sdata->vif.addr, ETH_ALEN); |
f14543ee FF |
2596 | memcpy(hdr.addr3, skb->data, ETH_ALEN); |
2597 | memcpy(hdr.addr4, skb->data + ETH_ALEN, ETH_ALEN); | |
2598 | hdrlen = 30; | |
c2c98fde | 2599 | authorized = test_sta_flag(sta, WLAN_STA_AUTHORIZED); |
a74a8c84 | 2600 | wme_sta = sta->sta.wme; |
f14543ee | 2601 | } |
55de908a JB |
2602 | ap_sdata = container_of(sdata->bss, struct ieee80211_sub_if_data, |
2603 | u.ap); | |
2604 | chanctx_conf = rcu_dereference(ap_sdata->vif.chanctx_conf); | |
4c9451ed JB |
2605 | if (!chanctx_conf) { |
2606 | ret = -ENOTCONN; | |
2607 | goto free; | |
2608 | } | |
4bf88530 | 2609 | band = chanctx_conf->def.chan->band; |
97ffe757 | 2610 | if (sdata->wdev.use_4addr) |
f14543ee | 2611 | break; |
fc0561dc | 2612 | fallthrough; |
f14543ee | 2613 | case NL80211_IFTYPE_AP: |
fe80123d AB |
2614 | if (sdata->vif.type == NL80211_IFTYPE_AP) |
2615 | chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf); | |
4c9451ed JB |
2616 | if (!chanctx_conf) { |
2617 | ret = -ENOTCONN; | |
2618 | goto free; | |
2619 | } | |
065e9605 | 2620 | fc |= cpu_to_le16(IEEE80211_FCTL_FROMDS); |
e2ebc74d JB |
2621 | /* DA BSSID SA */ |
2622 | memcpy(hdr.addr1, skb->data, ETH_ALEN); | |
47846c9b | 2623 | memcpy(hdr.addr2, sdata->vif.addr, ETH_ALEN); |
e2ebc74d JB |
2624 | memcpy(hdr.addr3, skb->data + ETH_ALEN, ETH_ALEN); |
2625 | hdrlen = 24; | |
4bf88530 | 2626 | band = chanctx_conf->def.chan->band; |
cf966838 | 2627 | break; |
33b64eb2 | 2628 | #ifdef CONFIG_MAC80211_MESH |
05c914fe | 2629 | case NL80211_IFTYPE_MESH_POINT: |
b8bacc18 | 2630 | if (!is_multicast_ether_addr(skb->data)) { |
163df6cf CYY |
2631 | struct sta_info *next_hop; |
2632 | bool mpp_lookup = true; | |
2633 | ||
bf7cd94d | 2634 | mpath = mesh_path_lookup(sdata, skb->data); |
163df6cf CYY |
2635 | if (mpath) { |
2636 | mpp_lookup = false; | |
2637 | next_hop = rcu_dereference(mpath->next_hop); | |
2638 | if (!next_hop || | |
2639 | !(mpath->flags & (MESH_PATH_ACTIVE | | |
2640 | MESH_PATH_RESOLVING))) | |
2641 | mpp_lookup = true; | |
2642 | } | |
2643 | ||
ab1c7906 | 2644 | if (mpp_lookup) { |
bf7cd94d | 2645 | mppath = mpp_path_lookup(sdata, skb->data); |
ab1c7906 HR |
2646 | if (mppath) |
2647 | mppath->exp_time = jiffies; | |
2648 | } | |
163df6cf CYY |
2649 | |
2650 | if (mppath && mpath) | |
2bdaf386 | 2651 | mesh_path_del(sdata, mpath->dst); |
b8bacc18 | 2652 | } |
79617dee | 2653 | |
f76b57b4 | 2654 | /* |
9d52501b JF |
2655 | * Use address extension if it is a packet from |
2656 | * another interface or if we know the destination | |
2657 | * is being proxied by a portal (i.e. portal address | |
2658 | * differs from proxied address) | |
f76b57b4 | 2659 | */ |
b203ca39 JP |
2660 | if (ether_addr_equal(sdata->vif.addr, skb->data + ETH_ALEN) && |
2661 | !(mppath && !ether_addr_equal(mppath->mpp, skb->data))) { | |
3c5772a5 JC |
2662 | hdrlen = ieee80211_fill_mesh_addresses(&hdr, &fc, |
2663 | skb->data, skb->data + ETH_ALEN); | |
bf7cd94d JB |
2664 | meshhdrlen = ieee80211_new_mesh_header(sdata, &mesh_hdr, |
2665 | NULL, NULL); | |
79617dee | 2666 | } else { |
27f01124 TP |
2667 | /* DS -> MBSS (802.11-2012 13.11.3.3). |
2668 | * For unicast with unknown forwarding information, | |
2669 | * destination might be in the MBSS or if that fails | |
2670 | * forwarded to another mesh gate. In either case | |
2671 | * resolution will be handled in ieee80211_xmit(), so | |
2672 | * leave the original DA. This also works for mcast */ | |
2673 | const u8 *mesh_da = skb->data; | |
2674 | ||
2675 | if (mppath) | |
2676 | mesh_da = mppath->mpp; | |
2677 | else if (mpath) | |
2678 | mesh_da = mpath->dst; | |
79617dee | 2679 | |
3c5772a5 | 2680 | hdrlen = ieee80211_fill_mesh_addresses(&hdr, &fc, |
47846c9b | 2681 | mesh_da, sdata->vif.addr); |
27f01124 TP |
2682 | if (is_multicast_ether_addr(mesh_da)) |
2683 | /* DA TA mSA AE:SA */ | |
bf7cd94d JB |
2684 | meshhdrlen = ieee80211_new_mesh_header( |
2685 | sdata, &mesh_hdr, | |
2686 | skb->data + ETH_ALEN, NULL); | |
3c5772a5 | 2687 | else |
27f01124 | 2688 | /* RA TA mDA mSA AE:DA SA */ |
bf7cd94d JB |
2689 | meshhdrlen = ieee80211_new_mesh_header( |
2690 | sdata, &mesh_hdr, skb->data, | |
2691 | skb->data + ETH_ALEN); | |
79617dee | 2692 | |
79617dee | 2693 | } |
55de908a | 2694 | chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf); |
4c9451ed JB |
2695 | if (!chanctx_conf) { |
2696 | ret = -ENOTCONN; | |
2697 | goto free; | |
2698 | } | |
4bf88530 | 2699 | band = chanctx_conf->def.chan->band; |
8828f81a RM |
2700 | |
2701 | /* For injected frames, fill RA right away as nexthop lookup | |
2702 | * will be skipped. | |
2703 | */ | |
2704 | if ((ctrl_flags & IEEE80211_TX_CTRL_SKIP_MPATH_LOOKUP) && | |
2705 | is_zero_ether_addr(hdr.addr1)) | |
2706 | memcpy(hdr.addr1, skb->data, ETH_ALEN); | |
33b64eb2 LCC |
2707 | break; |
2708 | #endif | |
05c914fe | 2709 | case NL80211_IFTYPE_STATION: |
97ffe757 JB |
2710 | /* we already did checks when looking up the RA STA */ |
2711 | tdls_peer = test_sta_flag(sta, WLAN_STA_TDLS_PEER); | |
941c93cd | 2712 | |
97ffe757 | 2713 | if (tdls_peer) { |
941c93cd AN |
2714 | /* DA SA BSSID */ |
2715 | memcpy(hdr.addr1, skb->data, ETH_ALEN); | |
2716 | memcpy(hdr.addr2, skb->data + ETH_ALEN, ETH_ALEN); | |
2717 | memcpy(hdr.addr3, sdata->u.mgd.bssid, ETH_ALEN); | |
2718 | hdrlen = 24; | |
2719 | } else if (sdata->u.mgd.use_4addr && | |
2720 | cpu_to_be16(ethertype) != sdata->control_port_protocol) { | |
2721 | fc |= cpu_to_le16(IEEE80211_FCTL_FROMDS | | |
2722 | IEEE80211_FCTL_TODS); | |
f14543ee | 2723 | /* RA TA DA SA */ |
941c93cd | 2724 | memcpy(hdr.addr1, sdata->u.mgd.bssid, ETH_ALEN); |
47846c9b | 2725 | memcpy(hdr.addr2, sdata->vif.addr, ETH_ALEN); |
f14543ee FF |
2726 | memcpy(hdr.addr3, skb->data, ETH_ALEN); |
2727 | memcpy(hdr.addr4, skb->data + ETH_ALEN, ETH_ALEN); | |
2728 | hdrlen = 30; | |
2729 | } else { | |
2730 | fc |= cpu_to_le16(IEEE80211_FCTL_TODS); | |
2731 | /* BSSID SA DA */ | |
941c93cd | 2732 | memcpy(hdr.addr1, sdata->u.mgd.bssid, ETH_ALEN); |
f14543ee FF |
2733 | memcpy(hdr.addr2, skb->data + ETH_ALEN, ETH_ALEN); |
2734 | memcpy(hdr.addr3, skb->data, ETH_ALEN); | |
2735 | hdrlen = 24; | |
2736 | } | |
55de908a | 2737 | chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf); |
4c9451ed JB |
2738 | if (!chanctx_conf) { |
2739 | ret = -ENOTCONN; | |
2740 | goto free; | |
2741 | } | |
4bf88530 | 2742 | band = chanctx_conf->def.chan->band; |
cf966838 | 2743 | break; |
239281f8 RL |
2744 | case NL80211_IFTYPE_OCB: |
2745 | /* DA SA BSSID */ | |
2746 | memcpy(hdr.addr1, skb->data, ETH_ALEN); | |
2747 | memcpy(hdr.addr2, skb->data + ETH_ALEN, ETH_ALEN); | |
2748 | eth_broadcast_addr(hdr.addr3); | |
2749 | hdrlen = 24; | |
2750 | chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf); | |
4c9451ed JB |
2751 | if (!chanctx_conf) { |
2752 | ret = -ENOTCONN; | |
2753 | goto free; | |
2754 | } | |
239281f8 RL |
2755 | band = chanctx_conf->def.chan->band; |
2756 | break; | |
05c914fe | 2757 | case NL80211_IFTYPE_ADHOC: |
e2ebc74d JB |
2758 | /* DA SA BSSID */ |
2759 | memcpy(hdr.addr1, skb->data, ETH_ALEN); | |
2760 | memcpy(hdr.addr2, skb->data + ETH_ALEN, ETH_ALEN); | |
46900298 | 2761 | memcpy(hdr.addr3, sdata->u.ibss.bssid, ETH_ALEN); |
e2ebc74d | 2762 | hdrlen = 24; |
55de908a | 2763 | chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf); |
4c9451ed JB |
2764 | if (!chanctx_conf) { |
2765 | ret = -ENOTCONN; | |
2766 | goto free; | |
2767 | } | |
4bf88530 | 2768 | band = chanctx_conf->def.chan->band; |
cf966838 JB |
2769 | break; |
2770 | default: | |
4c9451ed JB |
2771 | ret = -EINVAL; |
2772 | goto free; | |
e2ebc74d JB |
2773 | } |
2774 | ||
a729cff8 | 2775 | multicast = is_multicast_ether_addr(hdr.addr1); |
e2ebc74d | 2776 | |
97ffe757 JB |
2777 | /* sta is always NULL for mesh */ |
2778 | if (sta) { | |
2779 | authorized = test_sta_flag(sta, WLAN_STA_AUTHORIZED); | |
2780 | wme_sta = sta->sta.wme; | |
2781 | } else if (ieee80211_vif_is_mesh(&sdata->vif)) { | |
2782 | /* For mesh, the use of the QoS header is mandatory */ | |
c2c98fde | 2783 | wme_sta = true; |
97ffe757 | 2784 | } |
4777be41 | 2785 | |
527871d7 JB |
2786 | /* receiver does QoS (which also means we do) use it */ |
2787 | if (wme_sta) { | |
065e9605 | 2788 | fc |= cpu_to_le16(IEEE80211_STYPE_QOS_DATA); |
ce3edf6d JB |
2789 | hdrlen += 2; |
2790 | } | |
2791 | ||
2792 | /* | |
238814fd JB |
2793 | * Drop unicast frames to unauthorised stations unless they are |
2794 | * EAPOL frames from the local station. | |
ce3edf6d | 2795 | */ |
55182e4a | 2796 | if (unlikely(!ieee80211_vif_is_mesh(&sdata->vif) && |
239281f8 | 2797 | (sdata->vif.type != NL80211_IFTYPE_OCB) && |
a6ececf4 | 2798 | !multicast && !authorized && |
55182e4a | 2799 | (cpu_to_be16(ethertype) != sdata->control_port_protocol || |
b203ca39 | 2800 | !ether_addr_equal(sdata->vif.addr, skb->data + ETH_ALEN)))) { |
ce3edf6d | 2801 | #ifdef CONFIG_MAC80211_VERBOSE_DEBUG |
bdcbd8e0 | 2802 | net_info_ratelimited("%s: dropped frame to %pM (unauthorized port)\n", |
4c9451ed | 2803 | sdata->name, hdr.addr1); |
ce3edf6d JB |
2804 | #endif |
2805 | ||
2806 | I802_DEBUG_INC(local->tx_handlers_drop_unauth_port); | |
2807 | ||
4c9451ed JB |
2808 | ret = -EPERM; |
2809 | goto free; | |
ce3edf6d JB |
2810 | } |
2811 | ||
a7528198 MT |
2812 | if (unlikely(!multicast && ((skb->sk && |
2813 | skb_shinfo(skb)->tx_flags & SKBTX_WIFI_STATUS) || | |
2814 | ctrl_flags & IEEE80211_TX_CTL_REQ_TX_STATUS))) | |
2815 | info_id = ieee80211_store_ack_skb(local, skb, &info_flags, | |
2816 | cookie); | |
a729cff8 | 2817 | |
7e244707 HS |
2818 | /* |
2819 | * If the skb is shared we need to obtain our own copy. | |
2820 | */ | |
a4926abb RL |
2821 | skb = skb_share_check(skb, GFP_ATOMIC); |
2822 | if (unlikely(!skb)) { | |
2823 | ret = -ENOMEM; | |
2824 | goto free; | |
7e244707 HS |
2825 | } |
2826 | ||
065e9605 | 2827 | hdr.frame_control = fc; |
e2ebc74d JB |
2828 | hdr.duration_id = 0; |
2829 | hdr.seq_ctrl = 0; | |
2830 | ||
2831 | skip_header_bytes = ETH_HLEN; | |
2832 | if (ethertype == ETH_P_AARP || ethertype == ETH_P_IPX) { | |
2833 | encaps_data = bridge_tunnel_header; | |
2834 | encaps_len = sizeof(bridge_tunnel_header); | |
2835 | skip_header_bytes -= 2; | |
e5c5d22e | 2836 | } else if (ethertype >= ETH_P_802_3_MIN) { |
e2ebc74d JB |
2837 | encaps_data = rfc1042_header; |
2838 | encaps_len = sizeof(rfc1042_header); | |
2839 | skip_header_bytes -= 2; | |
2840 | } else { | |
2841 | encaps_data = NULL; | |
2842 | encaps_len = 0; | |
2843 | } | |
2844 | ||
2845 | skb_pull(skb, skip_header_bytes); | |
23c0752a | 2846 | head_need = hdrlen + encaps_len + meshhdrlen - skb_headroom(skb); |
e2ebc74d | 2847 | |
23c0752a JB |
2848 | /* |
2849 | * So we need to modify the skb header and hence need a copy of | |
2850 | * that. The head_need variable above doesn't, so far, include | |
2851 | * the needed header space that we don't need right away. If we | |
2852 | * can, then we don't reallocate right now but only after the | |
2853 | * frame arrives at the master device (if it does...) | |
2854 | * | |
2855 | * If we cannot, however, then we will reallocate to include all | |
2856 | * the ever needed space. Also, if we need to reallocate it anyway, | |
2857 | * make it big enough for everything we may ever need. | |
2858 | */ | |
e2ebc74d | 2859 | |
3a5be7d4 | 2860 | if (head_need > 0 || skb_cloned(skb)) { |
2475b1cc | 2861 | head_need += sdata->encrypt_headroom; |
23c0752a JB |
2862 | head_need += local->tx_headroom; |
2863 | head_need = max_t(int, 0, head_need); | |
14f46c1e | 2864 | if (ieee80211_skb_resize(sdata, skb, head_need, ENCRYPT_DATA)) { |
c3e7724b | 2865 | ieee80211_free_txskb(&local->hw, skb); |
1c963bec | 2866 | skb = NULL; |
4c9451ed | 2867 | return ERR_PTR(-ENOMEM); |
c3e7724b | 2868 | } |
e2ebc74d JB |
2869 | } |
2870 | ||
eae4430e | 2871 | if (encaps_data) |
e2ebc74d | 2872 | memcpy(skb_push(skb, encaps_len), encaps_data, encaps_len); |
c29b9b9b | 2873 | |
e4ab7eb0 | 2874 | #ifdef CONFIG_MAC80211_MESH |
eae4430e | 2875 | if (meshhdrlen > 0) |
33b64eb2 | 2876 | memcpy(skb_push(skb, meshhdrlen), &mesh_hdr, meshhdrlen); |
e4ab7eb0 | 2877 | #endif |
33b64eb2 | 2878 | |
065e9605 | 2879 | if (ieee80211_is_data_qos(fc)) { |
c29b9b9b JB |
2880 | __le16 *qos_control; |
2881 | ||
d58ff351 | 2882 | qos_control = skb_push(skb, 2); |
c29b9b9b JB |
2883 | memcpy(skb_push(skb, hdrlen - 2), &hdr, hdrlen - 2); |
2884 | /* | |
2885 | * Maybe we could actually set some fields here, for now just | |
2886 | * initialise to zero to indicate no special operation. | |
2887 | */ | |
2888 | *qos_control = 0; | |
2889 | } else | |
2890 | memcpy(skb_push(skb, hdrlen), &hdr, hdrlen); | |
2891 | ||
d57a544d | 2892 | skb_reset_mac_header(skb); |
e2ebc74d | 2893 | |
489ee919 | 2894 | info = IEEE80211_SKB_CB(skb); |
3b8d81e0 JB |
2895 | memset(info, 0, sizeof(*info)); |
2896 | ||
a729cff8 JB |
2897 | info->flags = info_flags; |
2898 | info->ack_frame_id = info_id; | |
73c4e195 | 2899 | info->band = band; |
06016772 | 2900 | info->control.flags = ctrl_flags; |
a729cff8 | 2901 | |
4c9451ed JB |
2902 | return skb; |
2903 | free: | |
2904 | kfree_skb(skb); | |
2905 | return ERR_PTR(ret); | |
2906 | } | |
2907 | ||
17c18bf8 JB |
2908 | /* |
2909 | * fast-xmit overview | |
2910 | * | |
2911 | * The core idea of this fast-xmit is to remove per-packet checks by checking | |
2912 | * them out of band. ieee80211_check_fast_xmit() implements the out-of-band | |
2913 | * checks that are needed to get the sta->fast_tx pointer assigned, after which | |
2914 | * much less work can be done per packet. For example, fragmentation must be | |
2915 | * disabled or the fast_tx pointer will not be set. All the conditions are seen | |
2916 | * in the code here. | |
2917 | * | |
2918 | * Once assigned, the fast_tx data structure also caches the per-packet 802.11 | |
2919 | * header and other data to aid packet processing in ieee80211_xmit_fast(). | |
2920 | * | |
2921 | * The most difficult part of this is that when any of these assumptions | |
2922 | * change, an external trigger (i.e. a call to ieee80211_clear_fast_xmit(), | |
2923 | * ieee80211_check_fast_xmit() or friends) is required to reset the data, | |
2924 | * since the per-packet code no longer checks the conditions. This is reflected | |
2925 | * by the calls to these functions throughout the rest of the code, and must be | |
2926 | * maintained if any of the TX path checks change. | |
2927 | */ | |
2928 | ||
2929 | void ieee80211_check_fast_xmit(struct sta_info *sta) | |
2930 | { | |
2931 | struct ieee80211_fast_tx build = {}, *fast_tx = NULL, *old; | |
2932 | struct ieee80211_local *local = sta->local; | |
2933 | struct ieee80211_sub_if_data *sdata = sta->sdata; | |
2934 | struct ieee80211_hdr *hdr = (void *)build.hdr; | |
2935 | struct ieee80211_chanctx_conf *chanctx_conf; | |
2936 | __le16 fc; | |
2937 | ||
30686bf7 | 2938 | if (!ieee80211_hw_check(&local->hw, SUPPORT_FAST_XMIT)) |
17c18bf8 JB |
2939 | return; |
2940 | ||
2941 | /* Locking here protects both the pointer itself, and against concurrent | |
2942 | * invocations winning data access races to, e.g., the key pointer that | |
2943 | * is used. | |
2944 | * Without it, the invocation of this function right after the key | |
2945 | * pointer changes wouldn't be sufficient, as another CPU could access | |
2946 | * the pointer, then stall, and then do the cache update after the CPU | |
2947 | * that invalidated the key. | |
2948 | * With the locking, such scenarios cannot happen as the check for the | |
2949 | * key and the fast-tx assignment are done atomically, so the CPU that | |
2950 | * modifies the key will either wait or other one will see the key | |
2951 | * cleared/changed already. | |
2952 | */ | |
2953 | spin_lock_bh(&sta->lock); | |
30686bf7 JB |
2954 | if (ieee80211_hw_check(&local->hw, SUPPORTS_PS) && |
2955 | !ieee80211_hw_check(&local->hw, SUPPORTS_DYNAMIC_PS) && | |
17c18bf8 JB |
2956 | sdata->vif.type == NL80211_IFTYPE_STATION) |
2957 | goto out; | |
2958 | ||
2959 | if (!test_sta_flag(sta, WLAN_STA_AUTHORIZED)) | |
2960 | goto out; | |
2961 | ||
2962 | if (test_sta_flag(sta, WLAN_STA_PS_STA) || | |
2963 | test_sta_flag(sta, WLAN_STA_PS_DRIVER) || | |
f7418bc1 FF |
2964 | test_sta_flag(sta, WLAN_STA_PS_DELIVER) || |
2965 | test_sta_flag(sta, WLAN_STA_CLEAR_PS_FILT)) | |
17c18bf8 JB |
2966 | goto out; |
2967 | ||
2968 | if (sdata->noack_map) | |
2969 | goto out; | |
2970 | ||
2971 | /* fast-xmit doesn't handle fragmentation at all */ | |
725b812c | 2972 | if (local->hw.wiphy->frag_threshold != (u32)-1 && |
f3fe4e93 | 2973 | !ieee80211_hw_check(&local->hw, SUPPORTS_TX_FRAG)) |
17c18bf8 JB |
2974 | goto out; |
2975 | ||
2976 | rcu_read_lock(); | |
2977 | chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf); | |
2978 | if (!chanctx_conf) { | |
2979 | rcu_read_unlock(); | |
2980 | goto out; | |
2981 | } | |
2982 | build.band = chanctx_conf->def.chan->band; | |
2983 | rcu_read_unlock(); | |
2984 | ||
2985 | fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_DATA); | |
2986 | ||
2987 | switch (sdata->vif.type) { | |
3ffd8840 JB |
2988 | case NL80211_IFTYPE_ADHOC: |
2989 | /* DA SA BSSID */ | |
2990 | build.da_offs = offsetof(struct ieee80211_hdr, addr1); | |
2991 | build.sa_offs = offsetof(struct ieee80211_hdr, addr2); | |
2992 | memcpy(hdr->addr3, sdata->u.ibss.bssid, ETH_ALEN); | |
2993 | build.hdr_len = 24; | |
2994 | break; | |
17c18bf8 JB |
2995 | case NL80211_IFTYPE_STATION: |
2996 | if (test_sta_flag(sta, WLAN_STA_TDLS_PEER)) { | |
2997 | /* DA SA BSSID */ | |
2998 | build.da_offs = offsetof(struct ieee80211_hdr, addr1); | |
2999 | build.sa_offs = offsetof(struct ieee80211_hdr, addr2); | |
3000 | memcpy(hdr->addr3, sdata->u.mgd.bssid, ETH_ALEN); | |
3001 | build.hdr_len = 24; | |
3002 | break; | |
3003 | } | |
3004 | ||
3005 | if (sdata->u.mgd.use_4addr) { | |
3006 | /* non-regular ethertype cannot use the fastpath */ | |
3007 | fc |= cpu_to_le16(IEEE80211_FCTL_FROMDS | | |
3008 | IEEE80211_FCTL_TODS); | |
3009 | /* RA TA DA SA */ | |
3010 | memcpy(hdr->addr1, sdata->u.mgd.bssid, ETH_ALEN); | |
3011 | memcpy(hdr->addr2, sdata->vif.addr, ETH_ALEN); | |
3012 | build.da_offs = offsetof(struct ieee80211_hdr, addr3); | |
3013 | build.sa_offs = offsetof(struct ieee80211_hdr, addr4); | |
3014 | build.hdr_len = 30; | |
3015 | break; | |
3016 | } | |
3017 | fc |= cpu_to_le16(IEEE80211_FCTL_TODS); | |
3018 | /* BSSID SA DA */ | |
3019 | memcpy(hdr->addr1, sdata->u.mgd.bssid, ETH_ALEN); | |
3020 | build.da_offs = offsetof(struct ieee80211_hdr, addr3); | |
3021 | build.sa_offs = offsetof(struct ieee80211_hdr, addr2); | |
3022 | build.hdr_len = 24; | |
3023 | break; | |
3024 | case NL80211_IFTYPE_AP_VLAN: | |
3025 | if (sdata->wdev.use_4addr) { | |
3026 | fc |= cpu_to_le16(IEEE80211_FCTL_FROMDS | | |
3027 | IEEE80211_FCTL_TODS); | |
3028 | /* RA TA DA SA */ | |
3029 | memcpy(hdr->addr1, sta->sta.addr, ETH_ALEN); | |
3030 | memcpy(hdr->addr2, sdata->vif.addr, ETH_ALEN); | |
3031 | build.da_offs = offsetof(struct ieee80211_hdr, addr3); | |
3032 | build.sa_offs = offsetof(struct ieee80211_hdr, addr4); | |
3033 | build.hdr_len = 30; | |
3034 | break; | |
3035 | } | |
fc0561dc | 3036 | fallthrough; |
17c18bf8 JB |
3037 | case NL80211_IFTYPE_AP: |
3038 | fc |= cpu_to_le16(IEEE80211_FCTL_FROMDS); | |
3039 | /* DA BSSID SA */ | |
3040 | build.da_offs = offsetof(struct ieee80211_hdr, addr1); | |
3041 | memcpy(hdr->addr2, sdata->vif.addr, ETH_ALEN); | |
3042 | build.sa_offs = offsetof(struct ieee80211_hdr, addr3); | |
3043 | build.hdr_len = 24; | |
3044 | break; | |
3045 | default: | |
3046 | /* not handled on fast-xmit */ | |
3047 | goto out; | |
3048 | } | |
3049 | ||
3050 | if (sta->sta.wme) { | |
3051 | build.hdr_len += 2; | |
3052 | fc |= cpu_to_le16(IEEE80211_STYPE_QOS_DATA); | |
3053 | } | |
3054 | ||
3055 | /* We store the key here so there's no point in using rcu_dereference() | |
3056 | * but that's fine because the code that changes the pointers will call | |
3057 | * this function after doing so. For a single CPU that would be enough, | |
3058 | * for multiple see the comment above. | |
3059 | */ | |
3060 | build.key = rcu_access_pointer(sta->ptk[sta->ptk_idx]); | |
3061 | if (!build.key) | |
3062 | build.key = rcu_access_pointer(sdata->default_unicast_key); | |
3063 | if (build.key) { | |
e495c247 | 3064 | bool gen_iv, iv_spc, mmic; |
17c18bf8 JB |
3065 | |
3066 | gen_iv = build.key->conf.flags & IEEE80211_KEY_FLAG_GENERATE_IV; | |
3067 | iv_spc = build.key->conf.flags & IEEE80211_KEY_FLAG_PUT_IV_SPACE; | |
9de18d81 DS |
3068 | mmic = build.key->conf.flags & |
3069 | (IEEE80211_KEY_FLAG_GENERATE_MMIC | | |
3070 | IEEE80211_KEY_FLAG_PUT_MIC_SPACE); | |
17c18bf8 JB |
3071 | |
3072 | /* don't handle software crypto */ | |
3073 | if (!(build.key->flags & KEY_FLAG_UPLOADED_TO_HARDWARE)) | |
3074 | goto out; | |
3075 | ||
62872a9b AW |
3076 | /* Key is being removed */ |
3077 | if (build.key->flags & KEY_FLAG_TAINTED) | |
3078 | goto out; | |
3079 | ||
17c18bf8 JB |
3080 | switch (build.key->conf.cipher) { |
3081 | case WLAN_CIPHER_SUITE_CCMP: | |
3082 | case WLAN_CIPHER_SUITE_CCMP_256: | |
96fc6efb | 3083 | if (gen_iv) |
17c18bf8 | 3084 | build.pn_offs = build.hdr_len; |
17c18bf8 JB |
3085 | if (gen_iv || iv_spc) |
3086 | build.hdr_len += IEEE80211_CCMP_HDR_LEN; | |
3087 | break; | |
3088 | case WLAN_CIPHER_SUITE_GCMP: | |
3089 | case WLAN_CIPHER_SUITE_GCMP_256: | |
96fc6efb | 3090 | if (gen_iv) |
17c18bf8 | 3091 | build.pn_offs = build.hdr_len; |
17c18bf8 JB |
3092 | if (gen_iv || iv_spc) |
3093 | build.hdr_len += IEEE80211_GCMP_HDR_LEN; | |
3094 | break; | |
e495c247 JB |
3095 | case WLAN_CIPHER_SUITE_TKIP: |
3096 | /* cannot handle MMIC or IV generation in xmit-fast */ | |
3097 | if (mmic || gen_iv) | |
3098 | goto out; | |
3099 | if (iv_spc) | |
3100 | build.hdr_len += IEEE80211_TKIP_IV_LEN; | |
3101 | break; | |
3102 | case WLAN_CIPHER_SUITE_WEP40: | |
3103 | case WLAN_CIPHER_SUITE_WEP104: | |
3104 | /* cannot handle IV generation in fast-xmit */ | |
3105 | if (gen_iv) | |
3106 | goto out; | |
3107 | if (iv_spc) | |
3108 | build.hdr_len += IEEE80211_WEP_IV_LEN; | |
3109 | break; | |
3110 | case WLAN_CIPHER_SUITE_AES_CMAC: | |
3111 | case WLAN_CIPHER_SUITE_BIP_CMAC_256: | |
3112 | case WLAN_CIPHER_SUITE_BIP_GMAC_128: | |
3113 | case WLAN_CIPHER_SUITE_BIP_GMAC_256: | |
3114 | WARN(1, | |
3115 | "management cipher suite 0x%x enabled for data\n", | |
3116 | build.key->conf.cipher); | |
17c18bf8 | 3117 | goto out; |
e495c247 JB |
3118 | default: |
3119 | /* we don't know how to generate IVs for this at all */ | |
3120 | if (WARN_ON(gen_iv)) | |
3121 | goto out; | |
3122 | /* pure hardware keys are OK, of course */ | |
3123 | if (!(build.key->flags & KEY_FLAG_CIPHER_SCHEME)) | |
3124 | break; | |
3125 | /* cipher scheme might require space allocation */ | |
3126 | if (iv_spc && | |
3127 | build.key->conf.iv_len > IEEE80211_FAST_XMIT_MAX_IV) | |
3128 | goto out; | |
3129 | if (iv_spc) | |
3130 | build.hdr_len += build.key->conf.iv_len; | |
17c18bf8 JB |
3131 | } |
3132 | ||
3133 | fc |= cpu_to_le16(IEEE80211_FCTL_PROTECTED); | |
3134 | } | |
3135 | ||
3136 | hdr->frame_control = fc; | |
3137 | ||
3138 | memcpy(build.hdr + build.hdr_len, | |
3139 | rfc1042_header, sizeof(rfc1042_header)); | |
3140 | build.hdr_len += sizeof(rfc1042_header); | |
3141 | ||
3142 | fast_tx = kmemdup(&build, sizeof(build), GFP_ATOMIC); | |
3143 | /* if the kmemdup fails, continue w/o fast_tx */ | |
17c18bf8 JB |
3144 | |
3145 | out: | |
3146 | /* we might have raced against another call to this function */ | |
3147 | old = rcu_dereference_protected(sta->fast_tx, | |
3148 | lockdep_is_held(&sta->lock)); | |
3149 | rcu_assign_pointer(sta->fast_tx, fast_tx); | |
3150 | if (old) | |
3151 | kfree_rcu(old, rcu_head); | |
3152 | spin_unlock_bh(&sta->lock); | |
3153 | } | |
3154 | ||
3155 | void ieee80211_check_fast_xmit_all(struct ieee80211_local *local) | |
3156 | { | |
3157 | struct sta_info *sta; | |
3158 | ||
3159 | rcu_read_lock(); | |
3160 | list_for_each_entry_rcu(sta, &local->sta_list, list) | |
3161 | ieee80211_check_fast_xmit(sta); | |
3162 | rcu_read_unlock(); | |
3163 | } | |
3164 | ||
3165 | void ieee80211_check_fast_xmit_iface(struct ieee80211_sub_if_data *sdata) | |
3166 | { | |
3167 | struct ieee80211_local *local = sdata->local; | |
3168 | struct sta_info *sta; | |
3169 | ||
3170 | rcu_read_lock(); | |
3171 | ||
3172 | list_for_each_entry_rcu(sta, &local->sta_list, list) { | |
3173 | if (sdata != sta->sdata && | |
3174 | (!sta->sdata->bss || sta->sdata->bss != sdata->bss)) | |
3175 | continue; | |
3176 | ieee80211_check_fast_xmit(sta); | |
3177 | } | |
3178 | ||
3179 | rcu_read_unlock(); | |
3180 | } | |
3181 | ||
3182 | void ieee80211_clear_fast_xmit(struct sta_info *sta) | |
3183 | { | |
3184 | struct ieee80211_fast_tx *fast_tx; | |
3185 | ||
3186 | spin_lock_bh(&sta->lock); | |
3187 | fast_tx = rcu_dereference_protected(sta->fast_tx, | |
3188 | lockdep_is_held(&sta->lock)); | |
3189 | RCU_INIT_POINTER(sta->fast_tx, NULL); | |
3190 | spin_unlock_bh(&sta->lock); | |
3191 | ||
3192 | if (fast_tx) | |
3193 | kfree_rcu(fast_tx, rcu_head); | |
3194 | } | |
3195 | ||
6e0456b5 | 3196 | static bool ieee80211_amsdu_realloc_pad(struct ieee80211_local *local, |
166ac9d5 | 3197 | struct sk_buff *skb, int headroom) |
6e0456b5 | 3198 | { |
166ac9d5 | 3199 | if (skb_headroom(skb) < headroom) { |
6e0456b5 FF |
3200 | I802_DEBUG_INC(local->tx_expand_skb_head); |
3201 | ||
166ac9d5 | 3202 | if (pskb_expand_head(skb, headroom, 0, GFP_ATOMIC)) { |
6e0456b5 FF |
3203 | wiphy_debug(local->hw.wiphy, |
3204 | "failed to reallocate TX buffer\n"); | |
3205 | return false; | |
3206 | } | |
3207 | } | |
3208 | ||
6e0456b5 FF |
3209 | return true; |
3210 | } | |
3211 | ||
3212 | static bool ieee80211_amsdu_prepare_head(struct ieee80211_sub_if_data *sdata, | |
3213 | struct ieee80211_fast_tx *fast_tx, | |
3214 | struct sk_buff *skb) | |
3215 | { | |
3216 | struct ieee80211_local *local = sdata->local; | |
3217 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); | |
3218 | struct ieee80211_hdr *hdr; | |
06f2bb1e | 3219 | struct ethhdr *amsdu_hdr; |
6e0456b5 FF |
3220 | int hdr_len = fast_tx->hdr_len - sizeof(rfc1042_header); |
3221 | int subframe_len = skb->len - hdr_len; | |
3222 | void *data; | |
06f2bb1e | 3223 | u8 *qc, *h_80211_src, *h_80211_dst; |
a3e2f4b6 | 3224 | const u8 *bssid; |
6e0456b5 FF |
3225 | |
3226 | if (info->flags & IEEE80211_TX_CTL_RATE_CTRL_PROBE) | |
3227 | return false; | |
3228 | ||
3229 | if (info->control.flags & IEEE80211_TX_CTRL_AMSDU) | |
3230 | return true; | |
3231 | ||
f50d2ff8 CKC |
3232 | if (!ieee80211_amsdu_realloc_pad(local, skb, |
3233 | sizeof(*amsdu_hdr) + | |
3234 | local->hw.extra_tx_headroom)) | |
6e0456b5 FF |
3235 | return false; |
3236 | ||
06f2bb1e MB |
3237 | data = skb_push(skb, sizeof(*amsdu_hdr)); |
3238 | memmove(data, data + sizeof(*amsdu_hdr), hdr_len); | |
3239 | hdr = data; | |
3240 | amsdu_hdr = data + hdr_len; | |
3241 | /* h_80211_src/dst is addr* field within hdr */ | |
3242 | h_80211_src = data + fast_tx->sa_offs; | |
3243 | h_80211_dst = data + fast_tx->da_offs; | |
6e0456b5 | 3244 | |
06f2bb1e MB |
3245 | amsdu_hdr->h_proto = cpu_to_be16(subframe_len); |
3246 | ether_addr_copy(amsdu_hdr->h_source, h_80211_src); | |
3247 | ether_addr_copy(amsdu_hdr->h_dest, h_80211_dst); | |
6e0456b5 | 3248 | |
a3e2f4b6 MB |
3249 | /* according to IEEE 802.11-2012 8.3.2 table 8-19, the outer SA/DA |
3250 | * fields needs to be changed to BSSID for A-MSDU frames depending | |
3251 | * on FromDS/ToDS values. | |
3252 | */ | |
3253 | switch (sdata->vif.type) { | |
3254 | case NL80211_IFTYPE_STATION: | |
3255 | bssid = sdata->u.mgd.bssid; | |
3256 | break; | |
3257 | case NL80211_IFTYPE_AP: | |
3258 | case NL80211_IFTYPE_AP_VLAN: | |
3259 | bssid = sdata->vif.addr; | |
3260 | break; | |
3261 | default: | |
3262 | bssid = NULL; | |
3263 | } | |
3264 | ||
3265 | if (bssid && ieee80211_has_fromds(hdr->frame_control)) | |
3266 | ether_addr_copy(h_80211_src, bssid); | |
3267 | ||
3268 | if (bssid && ieee80211_has_tods(hdr->frame_control)) | |
3269 | ether_addr_copy(h_80211_dst, bssid); | |
3270 | ||
6e0456b5 FF |
3271 | qc = ieee80211_get_qos_ctl(hdr); |
3272 | *qc |= IEEE80211_QOS_CTL_A_MSDU_PRESENT; | |
3273 | ||
3274 | info->control.flags |= IEEE80211_TX_CTRL_AMSDU; | |
3275 | ||
3276 | return true; | |
3277 | } | |
3278 | ||
3279 | static bool ieee80211_amsdu_aggregate(struct ieee80211_sub_if_data *sdata, | |
3280 | struct sta_info *sta, | |
3281 | struct ieee80211_fast_tx *fast_tx, | |
3282 | struct sk_buff *skb) | |
3283 | { | |
3284 | struct ieee80211_local *local = sdata->local; | |
fa962b92 MK |
3285 | struct fq *fq = &local->fq; |
3286 | struct fq_tin *tin; | |
3287 | struct fq_flow *flow; | |
6e0456b5 FF |
3288 | u8 tid = skb->priority & IEEE80211_QOS_CTL_TAG1D_MASK; |
3289 | struct ieee80211_txq *txq = sta->sta.txq[tid]; | |
3290 | struct txq_info *txqi; | |
3291 | struct sk_buff **frag_tail, *head; | |
3292 | int subframe_len = skb->len - ETH_ALEN; | |
3293 | u8 max_subframes = sta->sta.max_amsdu_subframes; | |
3294 | int max_frags = local->hw.max_tx_fragments; | |
3295 | int max_amsdu_len = sta->sta.max_amsdu_len; | |
eb9b64e3 | 3296 | int orig_truesize; |
f2af2df8 | 3297 | u32 flow_idx; |
6e0456b5 FF |
3298 | __be16 len; |
3299 | void *data; | |
3300 | bool ret = false; | |
fa962b92 | 3301 | unsigned int orig_len; |
66eb02d8 | 3302 | int n = 2, nfrags, pad = 0; |
166ac9d5 | 3303 | u16 hdrlen; |
6e0456b5 FF |
3304 | |
3305 | if (!ieee80211_hw_check(&local->hw, TX_AMSDU)) | |
3306 | return false; | |
3307 | ||
4f2e3eb6 RL |
3308 | if (sdata->vif.offload_flags & IEEE80211_OFFLOAD_ENCAP_ENABLED) |
3309 | return false; | |
3310 | ||
344f8e00 SS |
3311 | if (skb_is_gso(skb)) |
3312 | return false; | |
3313 | ||
6e0456b5 FF |
3314 | if (!txq) |
3315 | return false; | |
3316 | ||
3317 | txqi = to_txq_info(txq); | |
3318 | if (test_bit(IEEE80211_TXQ_NO_AMSDU, &txqi->flags)) | |
3319 | return false; | |
3320 | ||
3321 | if (sta->sta.max_rc_amsdu_len) | |
3322 | max_amsdu_len = min_t(int, max_amsdu_len, | |
3323 | sta->sta.max_rc_amsdu_len); | |
3324 | ||
edba6bda SS |
3325 | if (sta->sta.max_tid_amsdu_len[tid]) |
3326 | max_amsdu_len = min_t(int, max_amsdu_len, | |
3327 | sta->sta.max_tid_amsdu_len[tid]); | |
3328 | ||
f2af2df8 FF |
3329 | flow_idx = fq_flow_idx(fq, skb); |
3330 | ||
fa962b92 | 3331 | spin_lock_bh(&fq->lock); |
6e0456b5 | 3332 | |
fa962b92 MK |
3333 | /* TODO: Ideally aggregation should be done on dequeue to remain |
3334 | * responsive to environment changes. | |
3335 | */ | |
3336 | ||
3337 | tin = &txqi->tin; | |
bf9009bf | 3338 | flow = fq_flow_classify(fq, tin, flow_idx, skb); |
fa962b92 | 3339 | head = skb_peek_tail(&flow->queue); |
344f8e00 | 3340 | if (!head || skb_is_gso(head)) |
6e0456b5 FF |
3341 | goto out; |
3342 | ||
eb9b64e3 | 3343 | orig_truesize = head->truesize; |
fa962b92 MK |
3344 | orig_len = head->len; |
3345 | ||
6e0456b5 FF |
3346 | if (skb->len + head->len > max_amsdu_len) |
3347 | goto out; | |
3348 | ||
6e0456b5 FF |
3349 | nfrags = 1 + skb_shinfo(skb)->nr_frags; |
3350 | nfrags += 1 + skb_shinfo(head)->nr_frags; | |
3351 | frag_tail = &skb_shinfo(head)->frag_list; | |
3352 | while (*frag_tail) { | |
3353 | nfrags += 1 + skb_shinfo(*frag_tail)->nr_frags; | |
3354 | frag_tail = &(*frag_tail)->next; | |
3355 | n++; | |
3356 | } | |
3357 | ||
3358 | if (max_subframes && n > max_subframes) | |
3359 | goto out; | |
3360 | ||
3361 | if (max_frags && nfrags > max_frags) | |
3362 | goto out; | |
9739fe29 SS |
3363 | |
3364 | if (!drv_can_aggregate_in_amsdu(local, head, skb)) | |
3365 | goto out; | |
6e0456b5 | 3366 | |
1eb50790 | 3367 | if (!ieee80211_amsdu_prepare_head(sdata, fast_tx, head)) |
6e0456b5 FF |
3368 | goto out; |
3369 | ||
fe94bac6 CKC |
3370 | /* If n == 2, the "while (*frag_tail)" loop above didn't execute |
3371 | * and frag_tail should be &skb_shinfo(head)->frag_list. | |
3372 | * However, ieee80211_amsdu_prepare_head() can reallocate it. | |
3373 | * Reload frag_tail to have it pointing to the correct place. | |
3374 | */ | |
3375 | if (n == 2) | |
3376 | frag_tail = &skb_shinfo(head)->frag_list; | |
3377 | ||
166ac9d5 SS |
3378 | /* |
3379 | * Pad out the previous subframe to a multiple of 4 by adding the | |
3380 | * padding to the next one, that's being added. Note that head->len | |
3381 | * is the length of the full A-MSDU, but that works since each time | |
3382 | * we add a new subframe we pad out the previous one to a multiple | |
3383 | * of 4 and thus it no longer matters in the next round. | |
3384 | */ | |
3385 | hdrlen = fast_tx->hdr_len - sizeof(rfc1042_header); | |
3386 | if ((head->len - hdrlen) & 3) | |
3387 | pad = 4 - ((head->len - hdrlen) & 3); | |
3388 | ||
3389 | if (!ieee80211_amsdu_realloc_pad(local, skb, sizeof(rfc1042_header) + | |
3390 | 2 + pad)) | |
aa58acf3 | 3391 | goto out_recalc; |
6e0456b5 FF |
3392 | |
3393 | ret = true; | |
3394 | data = skb_push(skb, ETH_ALEN + 2); | |
3395 | memmove(data, data + ETH_ALEN + 2, 2 * ETH_ALEN); | |
3396 | ||
3397 | data += 2 * ETH_ALEN; | |
3398 | len = cpu_to_be16(subframe_len); | |
3399 | memcpy(data, &len, 2); | |
3400 | memcpy(data + 2, rfc1042_header, sizeof(rfc1042_header)); | |
3401 | ||
166ac9d5 SS |
3402 | memset(skb_push(skb, pad), 0, pad); |
3403 | ||
6e0456b5 FF |
3404 | head->len += skb->len; |
3405 | head->data_len += skb->len; | |
3406 | *frag_tail = skb; | |
3407 | ||
aa58acf3 | 3408 | out_recalc: |
eb9b64e3 | 3409 | fq->memory_usage += head->truesize - orig_truesize; |
aa58acf3 JB |
3410 | if (head->len != orig_len) { |
3411 | flow->backlog += head->len - orig_len; | |
3412 | tin->backlog_bytes += head->len - orig_len; | |
aa58acf3 | 3413 | } |
6e0456b5 | 3414 | out: |
fa962b92 | 3415 | spin_unlock_bh(&fq->lock); |
6e0456b5 FF |
3416 | |
3417 | return ret; | |
3418 | } | |
3419 | ||
bb42f2d1 THJ |
3420 | /* |
3421 | * Can be called while the sta lock is held. Anything that can cause packets to | |
3422 | * be generated will cause deadlock! | |
3423 | */ | |
03c3911d RL |
3424 | static ieee80211_tx_result |
3425 | ieee80211_xmit_fast_finish(struct ieee80211_sub_if_data *sdata, | |
3426 | struct sta_info *sta, u8 pn_offs, | |
3427 | struct ieee80211_key *key, | |
3428 | struct ieee80211_tx_data *tx) | |
bb42f2d1 | 3429 | { |
03c3911d | 3430 | struct sk_buff *skb = tx->skb; |
bb42f2d1 THJ |
3431 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); |
3432 | struct ieee80211_hdr *hdr = (void *)skb->data; | |
3433 | u8 tid = IEEE80211_NUM_TIDS; | |
3434 | ||
03c3911d RL |
3435 | if (!ieee80211_hw_check(&tx->local->hw, HAS_RATE_CONTROL) && |
3436 | ieee80211_tx_h_rate_ctrl(tx) != TX_CONTINUE) | |
3437 | return TX_DROP; | |
3438 | ||
bb42f2d1 THJ |
3439 | if (key) |
3440 | info->control.hw_key = &key->conf; | |
3441 | ||
36ec144f | 3442 | dev_sw_netstats_tx_add(skb->dev, 1, skb->len); |
bb42f2d1 THJ |
3443 | |
3444 | if (hdr->frame_control & cpu_to_le16(IEEE80211_STYPE_QOS_DATA)) { | |
3445 | tid = skb->priority & IEEE80211_QOS_CTL_TAG1D_MASK; | |
bb42f2d1 THJ |
3446 | hdr->seq_ctrl = ieee80211_tx_next_seq(sta, tid); |
3447 | } else { | |
3448 | info->flags |= IEEE80211_TX_CTL_ASSIGN_SEQ; | |
3449 | hdr->seq_ctrl = cpu_to_le16(sdata->sequence_number); | |
3450 | sdata->sequence_number += 0x10; | |
3451 | } | |
3452 | ||
3453 | if (skb_shinfo(skb)->gso_size) | |
046d2e7c | 3454 | sta->deflink.tx_stats.msdu[tid] += |
bb42f2d1 THJ |
3455 | DIV_ROUND_UP(skb->len, skb_shinfo(skb)->gso_size); |
3456 | else | |
046d2e7c | 3457 | sta->deflink.tx_stats.msdu[tid]++; |
bb42f2d1 THJ |
3458 | |
3459 | info->hw_queue = sdata->vif.hw_queue[skb_get_queue_mapping(skb)]; | |
3460 | ||
3461 | /* statistics normally done by ieee80211_tx_h_stats (but that | |
3462 | * has to consider fragmentation, so is more complex) | |
3463 | */ | |
046d2e7c S |
3464 | sta->deflink.tx_stats.bytes[skb_get_queue_mapping(skb)] += skb->len; |
3465 | sta->deflink.tx_stats.packets[skb_get_queue_mapping(skb)]++; | |
bb42f2d1 THJ |
3466 | |
3467 | if (pn_offs) { | |
3468 | u64 pn; | |
3469 | u8 *crypto_hdr = skb->data + pn_offs; | |
3470 | ||
3471 | switch (key->conf.cipher) { | |
3472 | case WLAN_CIPHER_SUITE_CCMP: | |
3473 | case WLAN_CIPHER_SUITE_CCMP_256: | |
3474 | case WLAN_CIPHER_SUITE_GCMP: | |
3475 | case WLAN_CIPHER_SUITE_GCMP_256: | |
3476 | pn = atomic64_inc_return(&key->conf.tx_pn); | |
3477 | crypto_hdr[0] = pn; | |
3478 | crypto_hdr[1] = pn >> 8; | |
96fc6efb | 3479 | crypto_hdr[3] = 0x20 | (key->conf.keyidx << 6); |
bb42f2d1 THJ |
3480 | crypto_hdr[4] = pn >> 16; |
3481 | crypto_hdr[5] = pn >> 24; | |
3482 | crypto_hdr[6] = pn >> 32; | |
3483 | crypto_hdr[7] = pn >> 40; | |
3484 | break; | |
3485 | } | |
3486 | } | |
03c3911d RL |
3487 | |
3488 | return TX_CONTINUE; | |
bb42f2d1 THJ |
3489 | } |
3490 | ||
17c18bf8 | 3491 | static bool ieee80211_xmit_fast(struct ieee80211_sub_if_data *sdata, |
bb42f2d1 | 3492 | struct sta_info *sta, |
17c18bf8 JB |
3493 | struct ieee80211_fast_tx *fast_tx, |
3494 | struct sk_buff *skb) | |
3495 | { | |
3496 | struct ieee80211_local *local = sdata->local; | |
3497 | u16 ethertype = (skb->data[12] << 8) | skb->data[13]; | |
3498 | int extra_head = fast_tx->hdr_len - (ETH_HLEN - 2); | |
3499 | int hw_headroom = sdata->local->hw.extra_tx_headroom; | |
3500 | struct ethhdr eth; | |
35f432a0 | 3501 | struct ieee80211_tx_info *info; |
17c18bf8 JB |
3502 | struct ieee80211_hdr *hdr = (void *)fast_tx->hdr; |
3503 | struct ieee80211_tx_data tx; | |
3504 | ieee80211_tx_result r; | |
3505 | struct tid_ampdu_tx *tid_tx = NULL; | |
3506 | u8 tid = IEEE80211_NUM_TIDS; | |
3507 | ||
3508 | /* control port protocol needs a lot of special handling */ | |
3509 | if (cpu_to_be16(ethertype) == sdata->control_port_protocol) | |
3510 | return false; | |
3511 | ||
3512 | /* only RFC 1042 SNAP */ | |
3513 | if (ethertype < ETH_P_802_3_MIN) | |
3514 | return false; | |
3515 | ||
3516 | /* don't handle TX status request here either */ | |
3517 | if (skb->sk && skb_shinfo(skb)->tx_flags & SKBTX_WIFI_STATUS) | |
3518 | return false; | |
3519 | ||
3520 | if (hdr->frame_control & cpu_to_le16(IEEE80211_STYPE_QOS_DATA)) { | |
3521 | tid = skb->priority & IEEE80211_QOS_CTL_TAG1D_MASK; | |
3522 | tid_tx = rcu_dereference(sta->ampdu_mlme.tid_tx[tid]); | |
472be00d JB |
3523 | if (tid_tx) { |
3524 | if (!test_bit(HT_AGG_STATE_OPERATIONAL, &tid_tx->state)) | |
3525 | return false; | |
3526 | if (tid_tx->timeout) | |
3527 | tid_tx->last_tx = jiffies; | |
3528 | } | |
17c18bf8 JB |
3529 | } |
3530 | ||
3531 | /* after this point (skb is modified) we cannot return false */ | |
3532 | ||
a4926abb RL |
3533 | skb = skb_share_check(skb, GFP_ATOMIC); |
3534 | if (unlikely(!skb)) | |
3535 | return true; | |
17c18bf8 | 3536 | |
6e0456b5 FF |
3537 | if ((hdr->frame_control & cpu_to_le16(IEEE80211_STYPE_QOS_DATA)) && |
3538 | ieee80211_amsdu_aggregate(sdata, sta, fast_tx, skb)) | |
3539 | return true; | |
3540 | ||
17c18bf8 JB |
3541 | /* will not be crypto-handled beyond what we do here, so use false |
3542 | * as the may-encrypt argument for the resize to not account for | |
3543 | * more room than we already have in 'extra_head' | |
3544 | */ | |
3545 | if (unlikely(ieee80211_skb_resize(sdata, skb, | |
3546 | max_t(int, extra_head + hw_headroom - | |
3547 | skb_headroom(skb), 0), | |
14f46c1e | 3548 | ENCRYPT_NO))) { |
17c18bf8 JB |
3549 | kfree_skb(skb); |
3550 | return true; | |
3551 | } | |
3552 | ||
3553 | memcpy(ð, skb->data, ETH_HLEN - 2); | |
d58ff351 | 3554 | hdr = skb_push(skb, extra_head); |
17c18bf8 JB |
3555 | memcpy(skb->data, fast_tx->hdr, fast_tx->hdr_len); |
3556 | memcpy(skb->data + fast_tx->da_offs, eth.h_dest, ETH_ALEN); | |
3557 | memcpy(skb->data + fast_tx->sa_offs, eth.h_source, ETH_ALEN); | |
3558 | ||
35f432a0 | 3559 | info = IEEE80211_SKB_CB(skb); |
17c18bf8 JB |
3560 | memset(info, 0, sizeof(*info)); |
3561 | info->band = fast_tx->band; | |
3562 | info->control.vif = &sdata->vif; | |
3563 | info->flags = IEEE80211_TX_CTL_FIRST_FRAGMENT | | |
3564 | IEEE80211_TX_CTL_DONTFRAG | | |
3565 | (tid_tx ? IEEE80211_TX_CTL_AMPDU : 0); | |
bb42f2d1 | 3566 | info->control.flags = IEEE80211_TX_CTRL_FAST_XMIT; |
17c18bf8 | 3567 | |
276d9e82 JN |
3568 | #ifdef CONFIG_MAC80211_DEBUGFS |
3569 | if (local->force_tx_status) | |
3570 | info->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS; | |
3571 | #endif | |
3572 | ||
a786f96d FF |
3573 | if (hdr->frame_control & cpu_to_le16(IEEE80211_STYPE_QOS_DATA)) { |
3574 | tid = skb->priority & IEEE80211_QOS_CTL_TAG1D_MASK; | |
3575 | *ieee80211_get_qos_ctl(hdr) = tid; | |
3576 | } | |
3577 | ||
17c18bf8 JB |
3578 | __skb_queue_head_init(&tx.skbs); |
3579 | ||
3580 | tx.flags = IEEE80211_TX_UNICAST; | |
3581 | tx.local = local; | |
3582 | tx.sdata = sdata; | |
3583 | tx.sta = sta; | |
3584 | tx.key = fast_tx->key; | |
3585 | ||
bb42f2d1 THJ |
3586 | if (ieee80211_queue_skb(local, sdata, sta, skb)) |
3587 | return true; | |
17c18bf8 | 3588 | |
03c3911d RL |
3589 | tx.skb = skb; |
3590 | r = ieee80211_xmit_fast_finish(sdata, sta, fast_tx->pn_offs, | |
3591 | fast_tx->key, &tx); | |
3592 | tx.skb = NULL; | |
3593 | if (r == TX_DROP) { | |
3594 | kfree_skb(skb); | |
3595 | return true; | |
3596 | } | |
17c18bf8 JB |
3597 | |
3598 | if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) | |
3599 | sdata = container_of(sdata->bss, | |
3600 | struct ieee80211_sub_if_data, u.ap); | |
3601 | ||
3602 | __skb_queue_tail(&tx.skbs, skb); | |
4fd0328d | 3603 | ieee80211_tx_frags(local, &sdata->vif, sta, &tx.skbs, false); |
17c18bf8 JB |
3604 | return true; |
3605 | } | |
3606 | ||
e0e2efff THJ |
3607 | struct sk_buff *ieee80211_tx_dequeue(struct ieee80211_hw *hw, |
3608 | struct ieee80211_txq *txq) | |
3609 | { | |
3610 | struct ieee80211_local *local = hw_to_local(hw); | |
3611 | struct txq_info *txqi = container_of(txq, struct txq_info, txq); | |
3612 | struct ieee80211_hdr *hdr; | |
3613 | struct sk_buff *skb = NULL; | |
3614 | struct fq *fq = &local->fq; | |
3615 | struct fq_tin *tin = &txqi->tin; | |
bb42f2d1 THJ |
3616 | struct ieee80211_tx_info *info; |
3617 | struct ieee80211_tx_data tx; | |
3618 | ieee80211_tx_result r; | |
21a5d4c3 | 3619 | struct ieee80211_vif *vif = txq->vif; |
e0e2efff | 3620 | |
fb0e76ab ES |
3621 | WARN_ON_ONCE(softirq_count() == 0); |
3622 | ||
7a89233a THJ |
3623 | if (!ieee80211_txq_airtime_check(hw, txq)) |
3624 | return NULL; | |
3625 | ||
ded4698b | 3626 | begin: |
e0e2efff THJ |
3627 | spin_lock_bh(&fq->lock); |
3628 | ||
21a5d4c3 MP |
3629 | if (test_bit(IEEE80211_TXQ_STOP, &txqi->flags) || |
3630 | test_bit(IEEE80211_TXQ_STOP_NETIF_TX, &txqi->flags)) | |
e0e2efff THJ |
3631 | goto out; |
3632 | ||
1153a747 | 3633 | if (vif->txqs_stopped[txq->ac]) { |
21a5d4c3 MP |
3634 | set_bit(IEEE80211_TXQ_STOP_NETIF_TX, &txqi->flags); |
3635 | goto out; | |
3636 | } | |
3637 | ||
bb42f2d1 THJ |
3638 | /* Make sure fragments stay together. */ |
3639 | skb = __skb_dequeue(&txqi->frags); | |
ca47b462 JB |
3640 | if (unlikely(skb)) { |
3641 | if (!(IEEE80211_SKB_CB(skb)->control.flags & | |
3642 | IEEE80211_TX_INTCFL_NEED_TXPROCESSING)) | |
3643 | goto out; | |
3644 | IEEE80211_SKB_CB(skb)->control.flags &= | |
3645 | ~IEEE80211_TX_INTCFL_NEED_TXPROCESSING; | |
3646 | } else { | |
3647 | skb = fq_tin_dequeue(fq, tin, fq_tin_dequeue_func); | |
3648 | } | |
bb42f2d1 | 3649 | |
e0e2efff THJ |
3650 | if (!skb) |
3651 | goto out; | |
3652 | ||
ded4698b FF |
3653 | spin_unlock_bh(&fq->lock); |
3654 | ||
e0e2efff | 3655 | hdr = (struct ieee80211_hdr *)skb->data; |
bb42f2d1 THJ |
3656 | info = IEEE80211_SKB_CB(skb); |
3657 | ||
3658 | memset(&tx, 0, sizeof(tx)); | |
3659 | __skb_queue_head_init(&tx.skbs); | |
3660 | tx.local = local; | |
3661 | tx.skb = skb; | |
3662 | tx.sdata = vif_to_sdata(info->control.vif); | |
3663 | ||
804fc6a2 | 3664 | if (txq->sta) { |
bb42f2d1 | 3665 | tx.sta = container_of(txq->sta, struct sta_info, sta); |
ce2e1ca7 JM |
3666 | /* |
3667 | * Drop unicast frames to unauthorised stations unless they are | |
804fc6a2 | 3668 | * injected frames or EAPOL frames from the local station. |
ce2e1ca7 | 3669 | */ |
804fc6a2 MV |
3670 | if (unlikely(!(info->flags & IEEE80211_TX_CTL_INJECTED) && |
3671 | ieee80211_is_data(hdr->frame_control) && | |
be8c827f | 3672 | !ieee80211_vif_is_mesh(&tx.sdata->vif) && |
ce2e1ca7 JM |
3673 | tx.sdata->vif.type != NL80211_IFTYPE_OCB && |
3674 | !is_multicast_ether_addr(hdr->addr1) && | |
3675 | !test_sta_flag(tx.sta, WLAN_STA_AUTHORIZED) && | |
3676 | (!(info->control.flags & | |
3677 | IEEE80211_TX_CTRL_PORT_CTRL_PROTO) || | |
3678 | !ether_addr_equal(tx.sdata->vif.addr, | |
3679 | hdr->addr2)))) { | |
3680 | I802_DEBUG_INC(local->tx_handlers_drop_unauth_port); | |
3681 | ieee80211_free_txskb(&local->hw, skb); | |
3682 | goto begin; | |
3683 | } | |
3684 | } | |
bb42f2d1 THJ |
3685 | |
3686 | /* | |
3687 | * The key can be removed while the packet was queued, so need to call | |
3688 | * this here to get the current key. | |
3689 | */ | |
3690 | r = ieee80211_tx_h_select_key(&tx); | |
3691 | if (r != TX_CONTINUE) { | |
3692 | ieee80211_free_txskb(&local->hw, skb); | |
3693 | goto begin; | |
3694 | } | |
3695 | ||
c1f4c9ed FF |
3696 | if (test_bit(IEEE80211_TXQ_AMPDU, &txqi->flags)) |
3697 | info->flags |= IEEE80211_TX_CTL_AMPDU; | |
3698 | else | |
3699 | info->flags &= ~IEEE80211_TX_CTL_AMPDU; | |
3700 | ||
3187ba0c RL |
3701 | if (info->flags & IEEE80211_TX_CTL_HW_80211_ENCAP) { |
3702 | if (!ieee80211_hw_check(&local->hw, HAS_RATE_CONTROL)) { | |
3703 | r = ieee80211_tx_h_rate_ctrl(&tx); | |
3704 | if (r != TX_CONTINUE) { | |
3705 | ieee80211_free_txskb(&local->hw, skb); | |
3706 | goto begin; | |
3707 | } | |
3708 | } | |
50ff477a | 3709 | goto encap_out; |
3187ba0c | 3710 | } |
50ff477a | 3711 | |
bb42f2d1 | 3712 | if (info->control.flags & IEEE80211_TX_CTRL_FAST_XMIT) { |
e0e2efff THJ |
3713 | struct sta_info *sta = container_of(txq->sta, struct sta_info, |
3714 | sta); | |
bb42f2d1 | 3715 | u8 pn_offs = 0; |
e0e2efff | 3716 | |
bb42f2d1 THJ |
3717 | if (tx.key && |
3718 | (tx.key->conf.flags & IEEE80211_KEY_FLAG_GENERATE_IV)) | |
3719 | pn_offs = ieee80211_hdrlen(hdr->frame_control); | |
3720 | ||
03c3911d RL |
3721 | r = ieee80211_xmit_fast_finish(sta->sdata, sta, pn_offs, |
3722 | tx.key, &tx); | |
3723 | if (r != TX_CONTINUE) { | |
3724 | ieee80211_free_txskb(&local->hw, skb); | |
3725 | goto begin; | |
3726 | } | |
bb42f2d1 THJ |
3727 | } else { |
3728 | if (invoke_tx_handlers_late(&tx)) | |
3729 | goto begin; | |
3730 | ||
3731 | skb = __skb_dequeue(&tx.skbs); | |
3732 | ||
ded4698b FF |
3733 | if (!skb_queue_empty(&tx.skbs)) { |
3734 | spin_lock_bh(&fq->lock); | |
bb42f2d1 | 3735 | skb_queue_splice_tail(&tx.skbs, &txqi->frags); |
ded4698b FF |
3736 | spin_unlock_bh(&fq->lock); |
3737 | } | |
e0e2efff THJ |
3738 | } |
3739 | ||
233e98dc | 3740 | if (skb_has_frag_list(skb) && |
1e1430d5 JB |
3741 | !ieee80211_hw_check(&local->hw, TX_FRAG_LIST)) { |
3742 | if (skb_linearize(skb)) { | |
3743 | ieee80211_free_txskb(&local->hw, skb); | |
3744 | goto begin; | |
3745 | } | |
3746 | } | |
3747 | ||
53168215 JB |
3748 | switch (tx.sdata->vif.type) { |
3749 | case NL80211_IFTYPE_MONITOR: | |
3750 | if (tx.sdata->u.mntr.flags & MONITOR_FLAG_ACTIVE) { | |
3751 | vif = &tx.sdata->vif; | |
3752 | break; | |
3753 | } | |
3754 | tx.sdata = rcu_dereference(local->monitor_sdata); | |
3755 | if (tx.sdata) { | |
3756 | vif = &tx.sdata->vif; | |
3757 | info->hw_queue = | |
3758 | vif->hw_queue[skb_get_queue_mapping(skb)]; | |
3759 | } else if (ieee80211_hw_check(&local->hw, QUEUE_CONTROL)) { | |
3760 | ieee80211_free_txskb(&local->hw, skb); | |
3761 | goto begin; | |
3762 | } else { | |
3763 | vif = NULL; | |
3764 | } | |
3765 | break; | |
3766 | case NL80211_IFTYPE_AP_VLAN: | |
3767 | tx.sdata = container_of(tx.sdata->bss, | |
3768 | struct ieee80211_sub_if_data, u.ap); | |
fc0561dc | 3769 | fallthrough; |
53168215 JB |
3770 | default: |
3771 | vif = &tx.sdata->vif; | |
3772 | break; | |
3773 | } | |
3774 | ||
50ff477a | 3775 | encap_out: |
53168215 | 3776 | IEEE80211_SKB_CB(skb)->control.vif = vif; |
7a89233a | 3777 | |
ca98c47d JB |
3778 | if (vif && |
3779 | wiphy_ext_feature_isset(local->hw.wiphy, NL80211_EXT_FEATURE_AQL)) { | |
3ff901cb | 3780 | bool ampdu = txq->ac != IEEE80211_AC_VO; |
7a89233a THJ |
3781 | u32 airtime; |
3782 | ||
3783 | airtime = ieee80211_calc_expected_tx_airtime(hw, vif, txq->sta, | |
3ff901cb | 3784 | skb->len, ampdu); |
7a89233a THJ |
3785 | if (airtime) { |
3786 | airtime = ieee80211_info_set_tx_time_est(info, airtime); | |
3787 | ieee80211_sta_update_pending_airtime(local, tx.sta, | |
3788 | txq->ac, | |
3789 | airtime, | |
3790 | false); | |
3791 | } | |
3792 | } | |
3793 | ||
ded4698b | 3794 | return skb; |
21a5d4c3 | 3795 | |
e0e2efff THJ |
3796 | out: |
3797 | spin_unlock_bh(&fq->lock); | |
3798 | ||
e0e2efff THJ |
3799 | return skb; |
3800 | } | |
3801 | EXPORT_SYMBOL(ieee80211_tx_dequeue); | |
3802 | ||
18667600 THJ |
3803 | struct ieee80211_txq *ieee80211_next_txq(struct ieee80211_hw *hw, u8 ac) |
3804 | { | |
3805 | struct ieee80211_local *local = hw_to_local(hw); | |
2433647b | 3806 | struct airtime_sched_info *air_sched; |
6a789ba6 | 3807 | u64 now = ktime_get_coarse_boottime_ns(); |
5b989c18 | 3808 | struct ieee80211_txq *ret = NULL; |
2433647b THJ |
3809 | struct airtime_info *air_info; |
3810 | struct txq_info *txqi = NULL; | |
3811 | struct rb_node *node; | |
3812 | bool first = false; | |
18667600 | 3813 | |
2433647b THJ |
3814 | air_sched = &local->airtime[ac]; |
3815 | spin_lock_bh(&air_sched->lock); | |
18667600 | 3816 | |
2433647b THJ |
3817 | node = air_sched->schedule_pos; |
3818 | ||
3819 | begin: | |
3820 | if (!node) { | |
3821 | node = rb_first_cached(&air_sched->active_txqs); | |
3822 | first = true; | |
3823 | } else { | |
3824 | node = rb_next(node); | |
3825 | } | |
3826 | ||
3827 | if (!node) | |
5b989c18 | 3828 | goto out; |
b4809e94 | 3829 | |
2433647b THJ |
3830 | txqi = container_of(node, struct txq_info, schedule_order); |
3831 | air_info = to_airtime_info(&txqi->txq); | |
3832 | ||
3833 | if (air_info->v_t > air_sched->v_t && | |
3834 | (!first || !airtime_catchup_v_t(air_sched, air_info->v_t, now))) | |
3835 | goto out; | |
3836 | ||
3837 | if (!ieee80211_txq_airtime_check(hw, &txqi->txq)) { | |
3838 | first = false; | |
3839 | goto begin; | |
3ace10f5 KY |
3840 | } |
3841 | ||
2433647b THJ |
3842 | air_sched->schedule_pos = node; |
3843 | air_sched->last_schedule_activity = now; | |
3844 | ret = &txqi->txq; | |
3845 | out: | |
3846 | spin_unlock_bh(&air_sched->lock); | |
3847 | return ret; | |
3848 | } | |
3849 | EXPORT_SYMBOL(ieee80211_next_txq); | |
3850 | ||
3851 | static void __ieee80211_insert_txq(struct rb_root_cached *root, | |
3852 | struct txq_info *txqi) | |
3853 | { | |
3854 | struct rb_node **new = &root->rb_root.rb_node; | |
3855 | struct airtime_info *old_air, *new_air; | |
3856 | struct rb_node *parent = NULL; | |
3857 | struct txq_info *__txqi; | |
3858 | bool leftmost = true; | |
3859 | ||
3860 | while (*new) { | |
3861 | parent = *new; | |
3862 | __txqi = rb_entry(parent, struct txq_info, schedule_order); | |
3863 | old_air = to_airtime_info(&__txqi->txq); | |
3864 | new_air = to_airtime_info(&txqi->txq); | |
3865 | ||
3866 | if (new_air->v_t <= old_air->v_t) { | |
3867 | new = &parent->rb_left; | |
3868 | } else { | |
3869 | new = &parent->rb_right; | |
3870 | leftmost = false; | |
3871 | } | |
3872 | } | |
3ace10f5 | 3873 | |
2433647b THJ |
3874 | rb_link_node(&txqi->schedule_order, parent, new); |
3875 | rb_insert_color_cached(&txqi->schedule_order, root, leftmost); | |
3876 | } | |
b4809e94 | 3877 | |
2433647b THJ |
3878 | void ieee80211_resort_txq(struct ieee80211_hw *hw, |
3879 | struct ieee80211_txq *txq) | |
3880 | { | |
3881 | struct airtime_info *air_info = to_airtime_info(txq); | |
3882 | struct ieee80211_local *local = hw_to_local(hw); | |
3883 | struct txq_info *txqi = to_txq_info(txq); | |
3884 | struct airtime_sched_info *air_sched; | |
3ace10f5 | 3885 | |
2433647b | 3886 | air_sched = &local->airtime[txq->ac]; |
3ace10f5 | 3887 | |
2433647b THJ |
3888 | lockdep_assert_held(&air_sched->lock); |
3889 | ||
3890 | if (!RB_EMPTY_NODE(&txqi->schedule_order)) { | |
3891 | struct airtime_info *a_prev = NULL, *a_next = NULL; | |
3892 | struct txq_info *t_prev, *t_next; | |
3893 | struct rb_node *n_prev, *n_next; | |
3894 | ||
3895 | /* Erasing a node can cause an expensive rebalancing operation, | |
3896 | * so we check the previous and next nodes first and only remove | |
3897 | * and re-insert if the current node is not already in the | |
3898 | * correct position. | |
3899 | */ | |
3900 | if ((n_prev = rb_prev(&txqi->schedule_order)) != NULL) { | |
3901 | t_prev = container_of(n_prev, struct txq_info, | |
3902 | schedule_order); | |
3903 | a_prev = to_airtime_info(&t_prev->txq); | |
b4809e94 | 3904 | } |
2433647b THJ |
3905 | |
3906 | if ((n_next = rb_next(&txqi->schedule_order)) != NULL) { | |
3907 | t_next = container_of(n_next, struct txq_info, | |
3908 | schedule_order); | |
3909 | a_next = to_airtime_info(&t_next->txq); | |
3910 | } | |
3911 | ||
3912 | if ((!a_prev || a_prev->v_t <= air_info->v_t) && | |
3913 | (!a_next || a_next->v_t > air_info->v_t)) | |
3914 | return; | |
3915 | ||
3916 | if (air_sched->schedule_pos == &txqi->schedule_order) | |
3917 | air_sched->schedule_pos = n_prev; | |
3918 | ||
3919 | rb_erase_cached(&txqi->schedule_order, | |
3920 | &air_sched->active_txqs); | |
3921 | RB_CLEAR_NODE(&txqi->schedule_order); | |
3922 | __ieee80211_insert_txq(&air_sched->active_txqs, txqi); | |
b4809e94 | 3923 | } |
2433647b THJ |
3924 | } |
3925 | ||
3926 | void ieee80211_update_airtime_weight(struct ieee80211_local *local, | |
3927 | struct airtime_sched_info *air_sched, | |
3928 | u64 now, bool force) | |
3929 | { | |
3930 | struct airtime_info *air_info, *tmp; | |
3931 | u64 weight_sum = 0; | |
3932 | ||
3933 | if (unlikely(!now)) | |
6a789ba6 | 3934 | now = ktime_get_coarse_boottime_ns(); |
b4809e94 | 3935 | |
2433647b | 3936 | lockdep_assert_held(&air_sched->lock); |
18667600 | 3937 | |
2433647b THJ |
3938 | if (!force && (air_sched->last_weight_update < |
3939 | now - AIRTIME_ACTIVE_DURATION)) | |
3940 | return; | |
3941 | ||
3942 | list_for_each_entry_safe(air_info, tmp, | |
3943 | &air_sched->active_list, list) { | |
3944 | if (airtime_is_active(air_info, now)) | |
3945 | weight_sum += air_info->weight; | |
3946 | else | |
3947 | list_del_init(&air_info->list); | |
3948 | } | |
3949 | airtime_weight_sum_set(air_sched, weight_sum); | |
3950 | air_sched->last_weight_update = now; | |
3951 | } | |
3952 | ||
3953 | void ieee80211_schedule_txq(struct ieee80211_hw *hw, | |
3954 | struct ieee80211_txq *txq) | |
3955 | __acquires(txq_lock) __releases(txq_lock) | |
3956 | { | |
3957 | struct ieee80211_local *local = hw_to_local(hw); | |
3958 | struct txq_info *txqi = to_txq_info(txq); | |
3959 | struct airtime_sched_info *air_sched; | |
6a789ba6 | 3960 | u64 now = ktime_get_coarse_boottime_ns(); |
2433647b THJ |
3961 | struct airtime_info *air_info; |
3962 | u8 ac = txq->ac; | |
3963 | bool was_active; | |
3964 | ||
3965 | air_sched = &local->airtime[ac]; | |
3966 | air_info = to_airtime_info(txq); | |
3967 | ||
3968 | spin_lock_bh(&air_sched->lock); | |
3969 | was_active = airtime_is_active(air_info, now); | |
3970 | airtime_set_active(air_sched, air_info, now); | |
3971 | ||
3972 | if (!RB_EMPTY_NODE(&txqi->schedule_order)) | |
5b989c18 | 3973 | goto out; |
18667600 | 3974 | |
2433647b THJ |
3975 | /* If the station has been inactive for a while, catch up its v_t so it |
3976 | * doesn't get indefinite priority; see comment above the definition of | |
3977 | * AIRTIME_MAX_BEHIND. | |
3978 | */ | |
3979 | if ((!was_active && air_info->v_t < air_sched->v_t) || | |
3980 | air_info->v_t < air_sched->v_t - AIRTIME_MAX_BEHIND) | |
3981 | air_info->v_t = air_sched->v_t; | |
3982 | ||
3983 | ieee80211_update_airtime_weight(local, air_sched, now, !was_active); | |
3984 | __ieee80211_insert_txq(&air_sched->active_txqs, txqi); | |
5b989c18 FF |
3985 | |
3986 | out: | |
2433647b | 3987 | spin_unlock_bh(&air_sched->lock); |
18667600 | 3988 | } |
2433647b | 3989 | EXPORT_SYMBOL(ieee80211_schedule_txq); |
18667600 | 3990 | |
2433647b THJ |
3991 | static void __ieee80211_unschedule_txq(struct ieee80211_hw *hw, |
3992 | struct ieee80211_txq *txq, | |
3993 | bool purge) | |
18667600 THJ |
3994 | { |
3995 | struct ieee80211_local *local = hw_to_local(hw); | |
3996 | struct txq_info *txqi = to_txq_info(txq); | |
2433647b THJ |
3997 | struct airtime_sched_info *air_sched; |
3998 | struct airtime_info *air_info; | |
18667600 | 3999 | |
2433647b THJ |
4000 | air_sched = &local->airtime[txq->ac]; |
4001 | air_info = to_airtime_info(&txqi->txq); | |
4002 | ||
4003 | lockdep_assert_held(&air_sched->lock); | |
4004 | ||
4005 | if (purge) { | |
4006 | list_del_init(&air_info->list); | |
4007 | ieee80211_update_airtime_weight(local, air_sched, 0, true); | |
b4809e94 | 4008 | } |
18667600 | 4009 | |
2433647b THJ |
4010 | if (RB_EMPTY_NODE(&txqi->schedule_order)) |
4011 | return; | |
4012 | ||
4013 | if (air_sched->schedule_pos == &txqi->schedule_order) | |
4014 | air_sched->schedule_pos = rb_prev(&txqi->schedule_order); | |
4015 | ||
4016 | if (!purge) | |
4017 | airtime_set_active(air_sched, air_info, | |
6a789ba6 | 4018 | ktime_get_coarse_boottime_ns()); |
2433647b THJ |
4019 | |
4020 | rb_erase_cached(&txqi->schedule_order, | |
4021 | &air_sched->active_txqs); | |
4022 | RB_CLEAR_NODE(&txqi->schedule_order); | |
390298e8 | 4023 | } |
2433647b THJ |
4024 | |
4025 | void ieee80211_unschedule_txq(struct ieee80211_hw *hw, | |
4026 | struct ieee80211_txq *txq, | |
4027 | bool purge) | |
4028 | __acquires(txq_lock) __releases(txq_lock) | |
4029 | { | |
4030 | struct ieee80211_local *local = hw_to_local(hw); | |
4031 | ||
4032 | spin_lock_bh(&local->airtime[txq->ac].lock); | |
4033 | __ieee80211_unschedule_txq(hw, txq, purge); | |
4034 | spin_unlock_bh(&local->airtime[txq->ac].lock); | |
4035 | } | |
4036 | ||
4037 | void ieee80211_return_txq(struct ieee80211_hw *hw, | |
4038 | struct ieee80211_txq *txq, bool force) | |
4039 | { | |
4040 | struct ieee80211_local *local = hw_to_local(hw); | |
4041 | struct txq_info *txqi = to_txq_info(txq); | |
4042 | ||
4043 | spin_lock_bh(&local->airtime[txq->ac].lock); | |
4044 | ||
4045 | if (!RB_EMPTY_NODE(&txqi->schedule_order) && !force && | |
4046 | !txq_has_queue(txq)) | |
4047 | __ieee80211_unschedule_txq(hw, txq, false); | |
4048 | ||
4049 | spin_unlock_bh(&local->airtime[txq->ac].lock); | |
4050 | } | |
4051 | EXPORT_SYMBOL(ieee80211_return_txq); | |
390298e8 | 4052 | |
e908435e LB |
4053 | DEFINE_STATIC_KEY_FALSE(aql_disable); |
4054 | ||
3ace10f5 KY |
4055 | bool ieee80211_txq_airtime_check(struct ieee80211_hw *hw, |
4056 | struct ieee80211_txq *txq) | |
4057 | { | |
2433647b | 4058 | struct airtime_info *air_info = to_airtime_info(txq); |
3ace10f5 KY |
4059 | struct ieee80211_local *local = hw_to_local(hw); |
4060 | ||
911bde0f | 4061 | if (!wiphy_ext_feature_isset(local->hw.wiphy, NL80211_EXT_FEATURE_AQL)) |
3ace10f5 KY |
4062 | return true; |
4063 | ||
e908435e LB |
4064 | if (static_branch_unlikely(&aql_disable)) |
4065 | return true; | |
4066 | ||
3ace10f5 KY |
4067 | if (!txq->sta) |
4068 | return true; | |
4069 | ||
73bc9e0a JB |
4070 | if (unlikely(txq->tid == IEEE80211_NUM_TIDS)) |
4071 | return true; | |
4072 | ||
2433647b | 4073 | if (atomic_read(&air_info->aql_tx_pending) < air_info->aql_limit_low) |
3ace10f5 KY |
4074 | return true; |
4075 | ||
4076 | if (atomic_read(&local->aql_total_pending_airtime) < | |
4077 | local->aql_threshold && | |
2433647b | 4078 | atomic_read(&air_info->aql_tx_pending) < air_info->aql_limit_high) |
3ace10f5 KY |
4079 | return true; |
4080 | ||
4081 | return false; | |
4082 | } | |
4083 | EXPORT_SYMBOL(ieee80211_txq_airtime_check); | |
4084 | ||
b4809e94 THJ |
4085 | bool ieee80211_txq_may_transmit(struct ieee80211_hw *hw, |
4086 | struct ieee80211_txq *txq) | |
4087 | { | |
2433647b | 4088 | struct txq_info *first_txqi = NULL, *txqi = to_txq_info(txq); |
b4809e94 | 4089 | struct ieee80211_local *local = hw_to_local(hw); |
2433647b THJ |
4090 | struct airtime_sched_info *air_sched; |
4091 | struct airtime_info *air_info; | |
4092 | struct rb_node *node = NULL; | |
4093 | bool ret = false; | |
4094 | u64 now; | |
b4809e94 | 4095 | |
b4809e94 | 4096 | |
2433647b THJ |
4097 | if (!ieee80211_txq_airtime_check(hw, txq)) |
4098 | return false; | |
b4809e94 | 4099 | |
2433647b THJ |
4100 | air_sched = &local->airtime[txq->ac]; |
4101 | spin_lock_bh(&air_sched->lock); | |
4102 | ||
4103 | if (RB_EMPTY_NODE(&txqi->schedule_order)) | |
b4809e94 THJ |
4104 | goto out; |
4105 | ||
6a789ba6 | 4106 | now = ktime_get_coarse_boottime_ns(); |
b4809e94 | 4107 | |
2433647b THJ |
4108 | /* Like in ieee80211_next_txq(), make sure the first station in the |
4109 | * scheduling order is eligible for transmission to avoid starvation. | |
4110 | */ | |
4111 | node = rb_first_cached(&air_sched->active_txqs); | |
4112 | if (node) { | |
4113 | first_txqi = container_of(node, struct txq_info, | |
4114 | schedule_order); | |
4115 | air_info = to_airtime_info(&first_txqi->txq); | |
4116 | ||
4117 | if (air_sched->v_t < air_info->v_t) | |
4118 | airtime_catchup_v_t(air_sched, air_info->v_t, now); | |
b4809e94 THJ |
4119 | } |
4120 | ||
2433647b THJ |
4121 | air_info = to_airtime_info(&txqi->txq); |
4122 | if (air_info->v_t <= air_sched->v_t) { | |
4123 | air_sched->last_schedule_activity = now; | |
4124 | ret = true; | |
4125 | } | |
b4809e94 | 4126 | |
b4809e94 | 4127 | out: |
2433647b THJ |
4128 | spin_unlock_bh(&air_sched->lock); |
4129 | return ret; | |
b4809e94 THJ |
4130 | } |
4131 | EXPORT_SYMBOL(ieee80211_txq_may_transmit); | |
4132 | ||
18667600 | 4133 | void ieee80211_txq_schedule_start(struct ieee80211_hw *hw, u8 ac) |
18667600 THJ |
4134 | { |
4135 | struct ieee80211_local *local = hw_to_local(hw); | |
2433647b | 4136 | struct airtime_sched_info *air_sched = &local->airtime[ac]; |
18667600 | 4137 | |
2433647b THJ |
4138 | spin_lock_bh(&air_sched->lock); |
4139 | air_sched->schedule_pos = NULL; | |
4140 | spin_unlock_bh(&air_sched->lock); | |
18667600 | 4141 | } |
5b989c18 | 4142 | EXPORT_SYMBOL(ieee80211_txq_schedule_start); |
18667600 | 4143 | |
4c9451ed JB |
4144 | void __ieee80211_subif_start_xmit(struct sk_buff *skb, |
4145 | struct net_device *dev, | |
06016772 | 4146 | u32 info_flags, |
a7528198 MT |
4147 | u32 ctrl_flags, |
4148 | u64 *cookie) | |
4c9451ed JB |
4149 | { |
4150 | struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); | |
1974da8b | 4151 | struct ieee80211_local *local = sdata->local; |
97ffe757 | 4152 | struct sta_info *sta; |
80616c0d | 4153 | struct sk_buff *next; |
30f6cf96 | 4154 | int len = skb->len; |
4c9451ed JB |
4155 | |
4156 | if (unlikely(skb->len < ETH_HLEN)) { | |
4157 | kfree_skb(skb); | |
4158 | return; | |
4159 | } | |
4160 | ||
4161 | rcu_read_lock(); | |
e2ebc74d | 4162 | |
2d981fdd JB |
4163 | if (ieee80211_lookup_ra_sta(sdata, skb, &sta)) |
4164 | goto out_free; | |
4c9451ed | 4165 | |
1974da8b FF |
4166 | if (IS_ERR(sta)) |
4167 | sta = NULL; | |
4168 | ||
4169 | if (local->ops->wake_tx_queue) { | |
4170 | u16 queue = __ieee80211_select_queue(sdata, sta, skb); | |
4171 | skb_set_queue_mapping(skb, queue); | |
180ac48e | 4172 | skb_get_hash(skb); |
1974da8b FF |
4173 | } |
4174 | ||
08a46c64 FF |
4175 | ieee80211_aggr_check(sdata, sta, skb); |
4176 | ||
48c06708 MB |
4177 | sk_pacing_shift_update(skb->sk, sdata->local->hw.tx_sk_pacing_shift); |
4178 | ||
1974da8b | 4179 | if (sta) { |
17c18bf8 JB |
4180 | struct ieee80211_fast_tx *fast_tx; |
4181 | ||
4182 | fast_tx = rcu_dereference(sta->fast_tx); | |
4183 | ||
4184 | if (fast_tx && | |
bb42f2d1 | 4185 | ieee80211_xmit_fast(sdata, sta, fast_tx, skb)) |
17c18bf8 JB |
4186 | goto out; |
4187 | } | |
4188 | ||
80616c0d JB |
4189 | if (skb_is_gso(skb)) { |
4190 | struct sk_buff *segs; | |
680a0dab | 4191 | |
80616c0d JB |
4192 | segs = skb_gso_segment(skb, 0); |
4193 | if (IS_ERR(segs)) { | |
2d981fdd | 4194 | goto out_free; |
80616c0d JB |
4195 | } else if (segs) { |
4196 | consume_skb(skb); | |
4197 | skb = segs; | |
4198 | } | |
4199 | } else { | |
4200 | /* we cannot process non-linear frames on this path */ | |
30f6cf96 FF |
4201 | if (skb_linearize(skb)) |
4202 | goto out_free; | |
80616c0d JB |
4203 | |
4204 | /* the frame could be fragmented, software-encrypted, and other | |
4205 | * things so we cannot really handle checksum offload with it - | |
4206 | * fix it up in software before we handle anything else. | |
4207 | */ | |
4208 | if (skb->ip_summed == CHECKSUM_PARTIAL) { | |
f603f1f3 JB |
4209 | skb_set_transport_header(skb, |
4210 | skb_checksum_start_offset(skb)); | |
80616c0d JB |
4211 | if (skb_checksum_help(skb)) |
4212 | goto out_free; | |
4213 | } | |
2d981fdd JB |
4214 | } |
4215 | ||
9f3ef3d7 JD |
4216 | skb_list_walk_safe(skb, skb, next) { |
4217 | skb_mark_not_on_list(skb); | |
80616c0d | 4218 | |
5af7fef3 MT |
4219 | if (skb->protocol == sdata->control_port_protocol) |
4220 | ctrl_flags |= IEEE80211_TX_CTRL_SKIP_MPATH_LOOKUP; | |
4221 | ||
06016772 | 4222 | skb = ieee80211_build_hdr(sdata, skb, info_flags, |
a7528198 | 4223 | sta, ctrl_flags, cookie); |
9f3ef3d7 JD |
4224 | if (IS_ERR(skb)) { |
4225 | kfree_skb_list(next); | |
80616c0d | 4226 | goto out; |
9f3ef3d7 | 4227 | } |
e2ebc74d | 4228 | |
36ec144f | 4229 | dev_sw_netstats_tx_add(dev, 1, skb->len); |
80616c0d | 4230 | |
08aca29a | 4231 | ieee80211_xmit(sdata, sta, skb); |
80616c0d | 4232 | } |
2d981fdd JB |
4233 | goto out; |
4234 | out_free: | |
4235 | kfree_skb(skb); | |
30f6cf96 | 4236 | len = 0; |
4c9451ed | 4237 | out: |
30f6cf96 FF |
4238 | if (len) |
4239 | ieee80211_tpt_led_trig_tx(local, len); | |
55de908a | 4240 | rcu_read_unlock(); |
e2ebc74d JB |
4241 | } |
4242 | ||
ebceec86 MB |
4243 | static int ieee80211_change_da(struct sk_buff *skb, struct sta_info *sta) |
4244 | { | |
4245 | struct ethhdr *eth; | |
4246 | int err; | |
4247 | ||
4248 | err = skb_ensure_writable(skb, ETH_HLEN); | |
4249 | if (unlikely(err)) | |
4250 | return err; | |
4251 | ||
4252 | eth = (void *)skb->data; | |
4253 | ether_addr_copy(eth->h_dest, sta->sta.addr); | |
4254 | ||
4255 | return 0; | |
4256 | } | |
4257 | ||
4258 | static bool ieee80211_multicast_to_unicast(struct sk_buff *skb, | |
4259 | struct net_device *dev) | |
4260 | { | |
4261 | struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); | |
4262 | const struct ethhdr *eth = (void *)skb->data; | |
4263 | const struct vlan_ethhdr *ethvlan = (void *)skb->data; | |
4264 | __be16 ethertype; | |
4265 | ||
4266 | if (likely(!is_multicast_ether_addr(eth->h_dest))) | |
4267 | return false; | |
4268 | ||
4269 | switch (sdata->vif.type) { | |
4270 | case NL80211_IFTYPE_AP_VLAN: | |
4271 | if (sdata->u.vlan.sta) | |
4272 | return false; | |
4273 | if (sdata->wdev.use_4addr) | |
4274 | return false; | |
fc0561dc | 4275 | fallthrough; |
ebceec86 MB |
4276 | case NL80211_IFTYPE_AP: |
4277 | /* check runtime toggle for this bss */ | |
4278 | if (!sdata->bss->multicast_to_unicast) | |
4279 | return false; | |
4280 | break; | |
4281 | default: | |
4282 | return false; | |
4283 | } | |
4284 | ||
4285 | /* multicast to unicast conversion only for some payload */ | |
4286 | ethertype = eth->h_proto; | |
4287 | if (ethertype == htons(ETH_P_8021Q) && skb->len >= VLAN_ETH_HLEN) | |
4288 | ethertype = ethvlan->h_vlan_encapsulated_proto; | |
4289 | switch (ethertype) { | |
4290 | case htons(ETH_P_ARP): | |
4291 | case htons(ETH_P_IP): | |
4292 | case htons(ETH_P_IPV6): | |
4293 | break; | |
4294 | default: | |
4295 | return false; | |
4296 | } | |
4297 | ||
4298 | return true; | |
4299 | } | |
4300 | ||
4301 | static void | |
4302 | ieee80211_convert_to_unicast(struct sk_buff *skb, struct net_device *dev, | |
4303 | struct sk_buff_head *queue) | |
4304 | { | |
4305 | struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); | |
4306 | struct ieee80211_local *local = sdata->local; | |
4307 | const struct ethhdr *eth = (struct ethhdr *)skb->data; | |
4308 | struct sta_info *sta, *first = NULL; | |
4309 | struct sk_buff *cloned_skb; | |
4310 | ||
4311 | rcu_read_lock(); | |
4312 | ||
4313 | list_for_each_entry_rcu(sta, &local->sta_list, list) { | |
4314 | if (sdata != sta->sdata) | |
4315 | /* AP-VLAN mismatch */ | |
4316 | continue; | |
4317 | if (unlikely(ether_addr_equal(eth->h_source, sta->sta.addr))) | |
4318 | /* do not send back to source */ | |
4319 | continue; | |
4320 | if (!first) { | |
4321 | first = sta; | |
4322 | continue; | |
4323 | } | |
4324 | cloned_skb = skb_clone(skb, GFP_ATOMIC); | |
4325 | if (!cloned_skb) | |
4326 | goto multicast; | |
4327 | if (unlikely(ieee80211_change_da(cloned_skb, sta))) { | |
4328 | dev_kfree_skb(cloned_skb); | |
4329 | goto multicast; | |
4330 | } | |
4331 | __skb_queue_tail(queue, cloned_skb); | |
4332 | } | |
4333 | ||
4334 | if (likely(first)) { | |
4335 | if (unlikely(ieee80211_change_da(skb, first))) | |
4336 | goto multicast; | |
4337 | __skb_queue_tail(queue, skb); | |
4338 | } else { | |
4339 | /* no STA connected, drop */ | |
4340 | kfree_skb(skb); | |
4341 | skb = NULL; | |
4342 | } | |
4343 | ||
4344 | goto out; | |
4345 | multicast: | |
4346 | __skb_queue_purge(queue); | |
4347 | __skb_queue_tail(queue, skb); | |
4348 | out: | |
4349 | rcu_read_unlock(); | |
4350 | } | |
4351 | ||
4c9451ed JB |
4352 | /** |
4353 | * ieee80211_subif_start_xmit - netif start_xmit function for 802.3 vifs | |
4354 | * @skb: packet to be sent | |
4355 | * @dev: incoming interface | |
4356 | * | |
4357 | * On failure skb will be freed. | |
4358 | */ | |
24d342c5 LK |
4359 | netdev_tx_t ieee80211_subif_start_xmit(struct sk_buff *skb, |
4360 | struct net_device *dev) | |
4361 | { | |
ebceec86 MB |
4362 | if (unlikely(ieee80211_multicast_to_unicast(skb, dev))) { |
4363 | struct sk_buff_head queue; | |
4364 | ||
4365 | __skb_queue_head_init(&queue); | |
4366 | ieee80211_convert_to_unicast(skb, dev, &queue); | |
4367 | while ((skb = __skb_dequeue(&queue))) | |
a7528198 | 4368 | __ieee80211_subif_start_xmit(skb, dev, 0, 0, NULL); |
ebceec86 | 4369 | } else { |
a7528198 | 4370 | __ieee80211_subif_start_xmit(skb, dev, 0, 0, NULL); |
ebceec86 MB |
4371 | } |
4372 | ||
24d342c5 LK |
4373 | return NETDEV_TX_OK; |
4374 | } | |
e2ebc74d | 4375 | |
50ff477a | 4376 | static bool ieee80211_tx_8023(struct ieee80211_sub_if_data *sdata, |
30f6cf96 | 4377 | struct sk_buff *skb, struct sta_info *sta, |
50ff477a JC |
4378 | bool txpending) |
4379 | { | |
4380 | struct ieee80211_local *local = sdata->local; | |
4381 | struct ieee80211_tx_control control = {}; | |
4382 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); | |
4383 | struct ieee80211_sta *pubsta = NULL; | |
4384 | unsigned long flags; | |
4385 | int q = info->hw_queue; | |
4386 | ||
196900fd LB |
4387 | if (sta) |
4388 | sk_pacing_shift_update(skb->sk, local->hw.tx_sk_pacing_shift); | |
4389 | ||
30f6cf96 FF |
4390 | ieee80211_tpt_led_trig_tx(local, skb->len); |
4391 | ||
50ff477a JC |
4392 | if (ieee80211_queue_skb(local, sdata, sta, skb)) |
4393 | return true; | |
4394 | ||
4395 | spin_lock_irqsave(&local->queue_stop_reason_lock, flags); | |
4396 | ||
4397 | if (local->queue_stop_reasons[q] || | |
4398 | (!txpending && !skb_queue_empty(&local->pending[q]))) { | |
4399 | if (txpending) | |
4400 | skb_queue_head(&local->pending[q], skb); | |
4401 | else | |
4402 | skb_queue_tail(&local->pending[q], skb); | |
4403 | ||
4404 | spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); | |
4405 | ||
4406 | return false; | |
4407 | } | |
4408 | ||
4409 | spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); | |
4410 | ||
4411 | if (sta && sta->uploaded) | |
4412 | pubsta = &sta->sta; | |
4413 | ||
4414 | control.sta = pubsta; | |
4415 | ||
4416 | drv_tx(local, &control, skb); | |
4417 | ||
4418 | return true; | |
4419 | } | |
4420 | ||
4421 | static void ieee80211_8023_xmit(struct ieee80211_sub_if_data *sdata, | |
4422 | struct net_device *dev, struct sta_info *sta, | |
6aea26ce | 4423 | struct ieee80211_key *key, struct sk_buff *skb) |
50ff477a | 4424 | { |
a4926abb | 4425 | struct ieee80211_tx_info *info; |
50ff477a | 4426 | struct ieee80211_local *local = sdata->local; |
96ae9cd0 FF |
4427 | struct tid_ampdu_tx *tid_tx; |
4428 | u8 tid; | |
50ff477a | 4429 | |
5f8d69ea FF |
4430 | if (local->ops->wake_tx_queue) { |
4431 | u16 queue = __ieee80211_select_queue(sdata, sta, skb); | |
4432 | skb_set_queue_mapping(skb, queue); | |
4433 | skb_get_hash(skb); | |
4434 | } | |
4435 | ||
50ff477a JC |
4436 | if (unlikely(test_bit(SCAN_SW_SCANNING, &local->scanning)) && |
4437 | test_bit(SDATA_STATE_OFFCHANNEL, &sdata->state)) | |
4438 | goto out_free; | |
4439 | ||
a4926abb RL |
4440 | skb = skb_share_check(skb, GFP_ATOMIC); |
4441 | if (unlikely(!skb)) | |
4442 | return; | |
4443 | ||
4444 | info = IEEE80211_SKB_CB(skb); | |
e61fbfca VT |
4445 | memset(info, 0, sizeof(*info)); |
4446 | ||
08a46c64 FF |
4447 | ieee80211_aggr_check(sdata, sta, skb); |
4448 | ||
aea6a3f0 FF |
4449 | tid = skb->priority & IEEE80211_QOS_CTL_TAG1D_MASK; |
4450 | tid_tx = rcu_dereference(sta->ampdu_mlme.tid_tx[tid]); | |
4451 | if (tid_tx) { | |
4452 | if (!test_bit(HT_AGG_STATE_OPERATIONAL, &tid_tx->state)) { | |
4453 | /* fall back to non-offload slow path */ | |
4454 | __ieee80211_subif_start_xmit(skb, dev, 0, 0, NULL); | |
4455 | return; | |
96ae9cd0 | 4456 | } |
aea6a3f0 FF |
4457 | |
4458 | info->flags |= IEEE80211_TX_CTL_AMPDU; | |
4459 | if (tid_tx->timeout) | |
4460 | tid_tx->last_tx = jiffies; | |
96ae9cd0 FF |
4461 | } |
4462 | ||
aea6a3f0 | 4463 | if (unlikely(skb->sk && |
50ff477a | 4464 | skb_shinfo(skb)->tx_flags & SKBTX_WIFI_STATUS)) |
e61fbfca VT |
4465 | info->ack_frame_id = ieee80211_store_ack_skb(local, skb, |
4466 | &info->flags, NULL); | |
50ff477a | 4467 | |
50ff477a JC |
4468 | info->hw_queue = sdata->vif.hw_queue[skb_get_queue_mapping(skb)]; |
4469 | ||
36ec144f | 4470 | dev_sw_netstats_tx_add(dev, 1, skb->len); |
50ff477a | 4471 | |
046d2e7c S |
4472 | sta->deflink.tx_stats.bytes[skb_get_queue_mapping(skb)] += skb->len; |
4473 | sta->deflink.tx_stats.packets[skb_get_queue_mapping(skb)]++; | |
50ff477a JC |
4474 | |
4475 | if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) | |
4476 | sdata = container_of(sdata->bss, | |
4477 | struct ieee80211_sub_if_data, u.ap); | |
4478 | ||
cc20ff2c | 4479 | info->flags |= IEEE80211_TX_CTL_HW_80211_ENCAP; |
50ff477a JC |
4480 | info->control.vif = &sdata->vif; |
4481 | ||
ae045152 FF |
4482 | if (key) |
4483 | info->control.hw_key = &key->conf; | |
4484 | ||
30f6cf96 | 4485 | ieee80211_tx_8023(sdata, skb, sta, false); |
50ff477a JC |
4486 | |
4487 | return; | |
4488 | ||
4489 | out_free: | |
4490 | kfree_skb(skb); | |
4491 | } | |
4492 | ||
4493 | netdev_tx_t ieee80211_subif_start_xmit_8023(struct sk_buff *skb, | |
4494 | struct net_device *dev) | |
4495 | { | |
4496 | struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); | |
aea6a3f0 | 4497 | struct ethhdr *ehdr = (struct ethhdr *)skb->data; |
6aea26ce | 4498 | struct ieee80211_key *key; |
50ff477a | 4499 | struct sta_info *sta; |
50ff477a JC |
4500 | |
4501 | if (unlikely(skb->len < ETH_HLEN)) { | |
4502 | kfree_skb(skb); | |
4503 | return NETDEV_TX_OK; | |
4504 | } | |
4505 | ||
4506 | rcu_read_lock(); | |
4507 | ||
6aea26ce | 4508 | if (ieee80211_lookup_ra_sta(sdata, skb, &sta)) { |
50ff477a | 4509 | kfree_skb(skb); |
6aea26ce FF |
4510 | goto out; |
4511 | } | |
4512 | ||
4513 | if (unlikely(IS_ERR_OR_NULL(sta) || !sta->uploaded || | |
4514 | !test_sta_flag(sta, WLAN_STA_AUTHORIZED) || | |
b101dd2d FF |
4515 | sdata->control_port_protocol == ehdr->h_proto)) |
4516 | goto skip_offload; | |
4517 | ||
4518 | key = rcu_dereference(sta->ptk[sta->ptk_idx]); | |
4519 | if (!key) | |
4520 | key = rcu_dereference(sdata->default_unicast_key); | |
4521 | ||
4522 | if (key && (!(key->flags & KEY_FLAG_UPLOADED_TO_HARDWARE) || | |
4523 | key->conf.cipher == WLAN_CIPHER_SUITE_TKIP)) | |
4524 | goto skip_offload; | |
4525 | ||
4526 | ieee80211_8023_xmit(sdata, dev, sta, key, skb); | |
4527 | goto out; | |
50ff477a | 4528 | |
b101dd2d FF |
4529 | skip_offload: |
4530 | ieee80211_subif_start_xmit(skb, dev); | |
6aea26ce | 4531 | out: |
50ff477a JC |
4532 | rcu_read_unlock(); |
4533 | ||
4534 | return NETDEV_TX_OK; | |
4535 | } | |
4536 | ||
7528ec57 JB |
4537 | struct sk_buff * |
4538 | ieee80211_build_data_template(struct ieee80211_sub_if_data *sdata, | |
4539 | struct sk_buff *skb, u32 info_flags) | |
4540 | { | |
4541 | struct ieee80211_hdr *hdr; | |
4542 | struct ieee80211_tx_data tx = { | |
4543 | .local = sdata->local, | |
4544 | .sdata = sdata, | |
4545 | }; | |
97ffe757 | 4546 | struct sta_info *sta; |
7528ec57 JB |
4547 | |
4548 | rcu_read_lock(); | |
4549 | ||
97ffe757 JB |
4550 | if (ieee80211_lookup_ra_sta(sdata, skb, &sta)) { |
4551 | kfree_skb(skb); | |
4552 | skb = ERR_PTR(-EINVAL); | |
4553 | goto out; | |
4554 | } | |
4555 | ||
a7528198 | 4556 | skb = ieee80211_build_hdr(sdata, skb, info_flags, sta, 0, NULL); |
7528ec57 JB |
4557 | if (IS_ERR(skb)) |
4558 | goto out; | |
4559 | ||
4560 | hdr = (void *)skb->data; | |
4561 | tx.sta = sta_info_get(sdata, hdr->addr1); | |
4562 | tx.skb = skb; | |
4563 | ||
4564 | if (ieee80211_tx_h_select_key(&tx) != TX_CONTINUE) { | |
4565 | rcu_read_unlock(); | |
4566 | kfree_skb(skb); | |
4567 | return ERR_PTR(-EINVAL); | |
4568 | } | |
4569 | ||
4570 | out: | |
4571 | rcu_read_unlock(); | |
4572 | return skb; | |
4573 | } | |
4574 | ||
e2530083 JB |
4575 | /* |
4576 | * ieee80211_clear_tx_pending may not be called in a context where | |
4577 | * it is possible that it packets could come in again. | |
4578 | */ | |
e2ebc74d JB |
4579 | void ieee80211_clear_tx_pending(struct ieee80211_local *local) |
4580 | { | |
1f98ab7f | 4581 | struct sk_buff *skb; |
2de8e0d9 | 4582 | int i; |
e2ebc74d | 4583 | |
1f98ab7f FF |
4584 | for (i = 0; i < local->hw.queues; i++) { |
4585 | while ((skb = skb_dequeue(&local->pending[i])) != NULL) | |
4586 | ieee80211_free_txskb(&local->hw, skb); | |
4587 | } | |
e2ebc74d JB |
4588 | } |
4589 | ||
7bb45683 JB |
4590 | /* |
4591 | * Returns false if the frame couldn't be transmitted but was queued instead, | |
4592 | * which in this case means re-queued -- take as an indication to stop sending | |
4593 | * more pending frames. | |
4594 | */ | |
cd8ffc80 JB |
4595 | static bool ieee80211_tx_pending_skb(struct ieee80211_local *local, |
4596 | struct sk_buff *skb) | |
4597 | { | |
4598 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); | |
4599 | struct ieee80211_sub_if_data *sdata; | |
4600 | struct sta_info *sta; | |
4601 | struct ieee80211_hdr *hdr; | |
7bb45683 | 4602 | bool result; |
55de908a | 4603 | struct ieee80211_chanctx_conf *chanctx_conf; |
cd8ffc80 | 4604 | |
5061b0c2 | 4605 | sdata = vif_to_sdata(info->control.vif); |
cd8ffc80 | 4606 | |
cc20ff2c | 4607 | if (info->control.flags & IEEE80211_TX_INTCFL_NEED_TXPROCESSING) { |
55de908a JB |
4608 | chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf); |
4609 | if (unlikely(!chanctx_conf)) { | |
4610 | dev_kfree_skb(skb); | |
4611 | return true; | |
4612 | } | |
73c4e195 | 4613 | info->band = chanctx_conf->def.chan->band; |
08aca29a | 4614 | result = ieee80211_tx(sdata, NULL, skb, true); |
cc20ff2c | 4615 | } else if (info->flags & IEEE80211_TX_CTL_HW_80211_ENCAP) { |
50ff477a JC |
4616 | if (ieee80211_lookup_ra_sta(sdata, skb, &sta)) { |
4617 | dev_kfree_skb(skb); | |
4618 | return true; | |
4619 | } | |
4620 | ||
4621 | if (IS_ERR(sta) || (sta && !sta->uploaded)) | |
4622 | sta = NULL; | |
4623 | ||
30f6cf96 | 4624 | result = ieee80211_tx_8023(sdata, skb, sta, true); |
cd8ffc80 | 4625 | } else { |
252b86c4 JB |
4626 | struct sk_buff_head skbs; |
4627 | ||
4628 | __skb_queue_head_init(&skbs); | |
4629 | __skb_queue_tail(&skbs, skb); | |
4630 | ||
cd8ffc80 | 4631 | hdr = (struct ieee80211_hdr *)skb->data; |
abe60632 | 4632 | sta = sta_info_get(sdata, hdr->addr1); |
cd8ffc80 | 4633 | |
30f6cf96 | 4634 | result = __ieee80211_tx(local, &skbs, sta, true); |
cd8ffc80 JB |
4635 | } |
4636 | ||
cd8ffc80 JB |
4637 | return result; |
4638 | } | |
4639 | ||
e2530083 | 4640 | /* |
3b8d81e0 | 4641 | * Transmit all pending packets. Called from tasklet. |
e2530083 | 4642 | */ |
da1cad73 | 4643 | void ieee80211_tx_pending(struct tasklet_struct *t) |
e2ebc74d | 4644 | { |
da1cad73 AP |
4645 | struct ieee80211_local *local = from_tasklet(local, t, |
4646 | tx_pending_tasklet); | |
2a577d98 | 4647 | unsigned long flags; |
cd8ffc80 | 4648 | int i; |
3b8d81e0 | 4649 | bool txok; |
e2ebc74d | 4650 | |
f0e72851 | 4651 | rcu_read_lock(); |
e2530083 | 4652 | |
3b8d81e0 | 4653 | spin_lock_irqsave(&local->queue_stop_reason_lock, flags); |
2a577d98 JB |
4654 | for (i = 0; i < local->hw.queues; i++) { |
4655 | /* | |
4656 | * If queue is stopped by something other than due to pending | |
4657 | * frames, or we have no pending frames, proceed to next queue. | |
4658 | */ | |
3b8d81e0 | 4659 | if (local->queue_stop_reasons[i] || |
2a577d98 | 4660 | skb_queue_empty(&local->pending[i])) |
e2ebc74d | 4661 | continue; |
e2530083 | 4662 | |
2a577d98 | 4663 | while (!skb_queue_empty(&local->pending[i])) { |
3b8d81e0 | 4664 | struct sk_buff *skb = __skb_dequeue(&local->pending[i]); |
5061b0c2 | 4665 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); |
5061b0c2 | 4666 | |
a7bc376c | 4667 | if (WARN_ON(!info->control.vif)) { |
c3e7724b | 4668 | ieee80211_free_txskb(&local->hw, skb); |
a7bc376c JB |
4669 | continue; |
4670 | } | |
4671 | ||
3b8d81e0 JB |
4672 | spin_unlock_irqrestore(&local->queue_stop_reason_lock, |
4673 | flags); | |
4674 | ||
4675 | txok = ieee80211_tx_pending_skb(local, skb); | |
3b8d81e0 JB |
4676 | spin_lock_irqsave(&local->queue_stop_reason_lock, |
4677 | flags); | |
4678 | if (!txok) | |
2a577d98 | 4679 | break; |
e2ebc74d | 4680 | } |
7236fe29 JB |
4681 | |
4682 | if (skb_queue_empty(&local->pending[i])) | |
3a25a8c8 | 4683 | ieee80211_propagate_queue_wake(local, i); |
e2ebc74d | 4684 | } |
3b8d81e0 | 4685 | spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); |
2a577d98 | 4686 | |
f0e72851 | 4687 | rcu_read_unlock(); |
e2ebc74d JB |
4688 | } |
4689 | ||
4690 | /* functions for drivers to get certain frames */ | |
4691 | ||
eac70c13 | 4692 | static void __ieee80211_beacon_add_tim(struct ieee80211_sub_if_data *sdata, |
6ec8c332 AO |
4693 | struct ps_data *ps, struct sk_buff *skb, |
4694 | bool is_template) | |
e2ebc74d JB |
4695 | { |
4696 | u8 *pos, *tim; | |
4697 | int aid0 = 0; | |
4698 | int i, have_bits = 0, n1, n2; | |
4699 | ||
4700 | /* Generate bitmap for TIM only if there are any STAs in power save | |
4701 | * mode. */ | |
d012a605 | 4702 | if (atomic_read(&ps->num_sta_ps) > 0) |
e2ebc74d JB |
4703 | /* in the hope that this is faster than |
4704 | * checking byte-for-byte */ | |
f359d3fe | 4705 | have_bits = !bitmap_empty((unsigned long *)ps->tim, |
e2ebc74d | 4706 | IEEE80211_MAX_AID+1); |
6ec8c332 AO |
4707 | if (!is_template) { |
4708 | if (ps->dtim_count == 0) | |
4709 | ps->dtim_count = sdata->vif.bss_conf.dtim_period - 1; | |
4710 | else | |
4711 | ps->dtim_count--; | |
4712 | } | |
e2ebc74d | 4713 | |
4df864c1 | 4714 | tim = pos = skb_put(skb, 6); |
e2ebc74d JB |
4715 | *pos++ = WLAN_EID_TIM; |
4716 | *pos++ = 4; | |
d012a605 | 4717 | *pos++ = ps->dtim_count; |
8860020e | 4718 | *pos++ = sdata->vif.bss_conf.dtim_period; |
e2ebc74d | 4719 | |
d012a605 | 4720 | if (ps->dtim_count == 0 && !skb_queue_empty(&ps->bc_buf)) |
e2ebc74d JB |
4721 | aid0 = 1; |
4722 | ||
d012a605 | 4723 | ps->dtim_bc_mc = aid0 == 1; |
512119b3 | 4724 | |
e2ebc74d JB |
4725 | if (have_bits) { |
4726 | /* Find largest even number N1 so that bits numbered 1 through | |
4727 | * (N1 x 8) - 1 in the bitmap are 0 and number N2 so that bits | |
4728 | * (N2 + 1) x 8 through 2007 are 0. */ | |
4729 | n1 = 0; | |
4730 | for (i = 0; i < IEEE80211_MAX_TIM_LEN; i++) { | |
d012a605 | 4731 | if (ps->tim[i]) { |
e2ebc74d JB |
4732 | n1 = i & 0xfe; |
4733 | break; | |
4734 | } | |
4735 | } | |
4736 | n2 = n1; | |
4737 | for (i = IEEE80211_MAX_TIM_LEN - 1; i >= n1; i--) { | |
d012a605 | 4738 | if (ps->tim[i]) { |
e2ebc74d JB |
4739 | n2 = i; |
4740 | break; | |
4741 | } | |
4742 | } | |
4743 | ||
4744 | /* Bitmap control */ | |
4745 | *pos++ = n1 | aid0; | |
4746 | /* Part Virt Bitmap */ | |
5220da39 | 4747 | skb_put(skb, n2 - n1); |
d012a605 | 4748 | memcpy(pos, ps->tim + n1, n2 - n1 + 1); |
e2ebc74d JB |
4749 | |
4750 | tim[1] = n2 - n1 + 4; | |
e2ebc74d JB |
4751 | } else { |
4752 | *pos++ = aid0; /* Bitmap control */ | |
4753 | *pos++ = 0; /* Part Virt Bitmap */ | |
4754 | } | |
e2ebc74d JB |
4755 | } |
4756 | ||
eac70c13 | 4757 | static int ieee80211_beacon_add_tim(struct ieee80211_sub_if_data *sdata, |
6ec8c332 AO |
4758 | struct ps_data *ps, struct sk_buff *skb, |
4759 | bool is_template) | |
eac70c13 MP |
4760 | { |
4761 | struct ieee80211_local *local = sdata->local; | |
4762 | ||
4763 | /* | |
4764 | * Not very nice, but we want to allow the driver to call | |
4765 | * ieee80211_beacon_get() as a response to the set_tim() | |
4766 | * callback. That, however, is already invoked under the | |
4767 | * sta_lock to guarantee consistent and race-free update | |
4768 | * of the tim bitmap in mac80211 and the driver. | |
4769 | */ | |
4770 | if (local->tim_in_locked_section) { | |
6ec8c332 | 4771 | __ieee80211_beacon_add_tim(sdata, ps, skb, is_template); |
eac70c13 | 4772 | } else { |
1b91731d | 4773 | spin_lock_bh(&local->tim_lock); |
6ec8c332 | 4774 | __ieee80211_beacon_add_tim(sdata, ps, skb, is_template); |
1b91731d | 4775 | spin_unlock_bh(&local->tim_lock); |
eac70c13 MP |
4776 | } |
4777 | ||
4778 | return 0; | |
4779 | } | |
4780 | ||
8552a434 JC |
4781 | static void ieee80211_set_beacon_cntdwn(struct ieee80211_sub_if_data *sdata, |
4782 | struct beacon_data *beacon) | |
73da7d5b | 4783 | { |
5f9404ab | 4784 | u8 *beacon_data, count, max_count = 1; |
73da7d5b | 4785 | struct probe_resp *resp; |
cd7760e6 | 4786 | size_t beacon_data_len; |
5f9404ab | 4787 | u16 *bcn_offsets; |
0d06d9ba | 4788 | int i; |
cd7760e6 SW |
4789 | |
4790 | switch (sdata->vif.type) { | |
4791 | case NL80211_IFTYPE_AP: | |
4792 | beacon_data = beacon->tail; | |
4793 | beacon_data_len = beacon->tail_len; | |
4794 | break; | |
4795 | case NL80211_IFTYPE_ADHOC: | |
4796 | beacon_data = beacon->head; | |
4797 | beacon_data_len = beacon->head_len; | |
4798 | break; | |
b8456a14 CYY |
4799 | case NL80211_IFTYPE_MESH_POINT: |
4800 | beacon_data = beacon->head; | |
4801 | beacon_data_len = beacon->head_len; | |
4802 | break; | |
cd7760e6 SW |
4803 | default: |
4804 | return; | |
4805 | } | |
73da7d5b | 4806 | |
af296bdb | 4807 | rcu_read_lock(); |
5f9404ab JC |
4808 | resp = rcu_dereference(sdata->u.ap.probe_resp); |
4809 | ||
4810 | bcn_offsets = beacon->cntdwn_counter_offsets; | |
4811 | count = beacon->cntdwn_current_counter; | |
4812 | if (sdata->vif.csa_active) | |
4813 | max_count = IEEE80211_MAX_CNTDWN_COUNTERS_NUM; | |
0d06d9ba | 4814 | |
5f9404ab JC |
4815 | for (i = 0; i < max_count; ++i) { |
4816 | if (bcn_offsets[i]) { | |
4817 | if (WARN_ON_ONCE(bcn_offsets[i] >= beacon_data_len)) { | |
0d06d9ba AO |
4818 | rcu_read_unlock(); |
4819 | return; | |
4820 | } | |
5f9404ab | 4821 | beacon_data[bcn_offsets[i]] = count; |
73da7d5b | 4822 | } |
af296bdb | 4823 | |
5f9404ab JC |
4824 | if (sdata->vif.type == NL80211_IFTYPE_AP && resp) { |
4825 | u16 *resp_offsets = resp->cntdwn_counter_offsets; | |
4826 | ||
4827 | resp->data[resp_offsets[i]] = count; | |
4828 | } | |
73da7d5b | 4829 | } |
af296bdb | 4830 | rcu_read_unlock(); |
1af586c9 AO |
4831 | } |
4832 | ||
8552a434 | 4833 | static u8 __ieee80211_beacon_update_cntdwn(struct beacon_data *beacon) |
e996ec2a | 4834 | { |
8552a434 | 4835 | beacon->cntdwn_current_counter--; |
e996ec2a WD |
4836 | |
4837 | /* the counter should never reach 0 */ | |
8552a434 | 4838 | WARN_ON_ONCE(!beacon->cntdwn_current_counter); |
e996ec2a | 4839 | |
8552a434 | 4840 | return beacon->cntdwn_current_counter; |
e996ec2a WD |
4841 | } |
4842 | ||
8552a434 | 4843 | u8 ieee80211_beacon_update_cntdwn(struct ieee80211_vif *vif) |
1af586c9 AO |
4844 | { |
4845 | struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); | |
af296bdb MK |
4846 | struct beacon_data *beacon = NULL; |
4847 | u8 count = 0; | |
0d06d9ba | 4848 | |
af296bdb MK |
4849 | rcu_read_lock(); |
4850 | ||
4851 | if (sdata->vif.type == NL80211_IFTYPE_AP) | |
4852 | beacon = rcu_dereference(sdata->u.ap.beacon); | |
4853 | else if (sdata->vif.type == NL80211_IFTYPE_ADHOC) | |
4854 | beacon = rcu_dereference(sdata->u.ibss.presp); | |
4855 | else if (ieee80211_vif_is_mesh(&sdata->vif)) | |
4856 | beacon = rcu_dereference(sdata->u.mesh.beacon); | |
4857 | ||
4858 | if (!beacon) | |
4859 | goto unlock; | |
4860 | ||
8552a434 | 4861 | count = __ieee80211_beacon_update_cntdwn(beacon); |
1af586c9 | 4862 | |
af296bdb MK |
4863 | unlock: |
4864 | rcu_read_unlock(); | |
4865 | return count; | |
73da7d5b | 4866 | } |
8552a434 | 4867 | EXPORT_SYMBOL(ieee80211_beacon_update_cntdwn); |
73da7d5b | 4868 | |
8552a434 | 4869 | void ieee80211_beacon_set_cntdwn(struct ieee80211_vif *vif, u8 counter) |
03737001 GG |
4870 | { |
4871 | struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); | |
4872 | struct beacon_data *beacon = NULL; | |
4873 | ||
4874 | rcu_read_lock(); | |
4875 | ||
4876 | if (sdata->vif.type == NL80211_IFTYPE_AP) | |
4877 | beacon = rcu_dereference(sdata->u.ap.beacon); | |
4878 | else if (sdata->vif.type == NL80211_IFTYPE_ADHOC) | |
4879 | beacon = rcu_dereference(sdata->u.ibss.presp); | |
4880 | else if (ieee80211_vif_is_mesh(&sdata->vif)) | |
4881 | beacon = rcu_dereference(sdata->u.mesh.beacon); | |
4882 | ||
4883 | if (!beacon) | |
4884 | goto unlock; | |
4885 | ||
8552a434 JC |
4886 | if (counter < beacon->cntdwn_current_counter) |
4887 | beacon->cntdwn_current_counter = counter; | |
03737001 GG |
4888 | |
4889 | unlock: | |
4890 | rcu_read_unlock(); | |
4891 | } | |
8552a434 | 4892 | EXPORT_SYMBOL(ieee80211_beacon_set_cntdwn); |
03737001 | 4893 | |
8552a434 | 4894 | bool ieee80211_beacon_cntdwn_is_complete(struct ieee80211_vif *vif) |
73da7d5b SW |
4895 | { |
4896 | struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); | |
4897 | struct beacon_data *beacon = NULL; | |
4898 | u8 *beacon_data; | |
4899 | size_t beacon_data_len; | |
73da7d5b SW |
4900 | int ret = false; |
4901 | ||
4902 | if (!ieee80211_sdata_running(sdata)) | |
4903 | return false; | |
4904 | ||
4905 | rcu_read_lock(); | |
4906 | if (vif->type == NL80211_IFTYPE_AP) { | |
4907 | struct ieee80211_if_ap *ap = &sdata->u.ap; | |
4908 | ||
4909 | beacon = rcu_dereference(ap->beacon); | |
4910 | if (WARN_ON(!beacon || !beacon->tail)) | |
4911 | goto out; | |
4912 | beacon_data = beacon->tail; | |
4913 | beacon_data_len = beacon->tail_len; | |
cd7760e6 SW |
4914 | } else if (vif->type == NL80211_IFTYPE_ADHOC) { |
4915 | struct ieee80211_if_ibss *ifibss = &sdata->u.ibss; | |
4916 | ||
4917 | beacon = rcu_dereference(ifibss->presp); | |
4918 | if (!beacon) | |
4919 | goto out; | |
4920 | ||
b8456a14 CYY |
4921 | beacon_data = beacon->head; |
4922 | beacon_data_len = beacon->head_len; | |
4923 | } else if (vif->type == NL80211_IFTYPE_MESH_POINT) { | |
4924 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; | |
4925 | ||
4926 | beacon = rcu_dereference(ifmsh->beacon); | |
4927 | if (!beacon) | |
4928 | goto out; | |
4929 | ||
cd7760e6 SW |
4930 | beacon_data = beacon->head; |
4931 | beacon_data_len = beacon->head_len; | |
73da7d5b SW |
4932 | } else { |
4933 | WARN_ON(1); | |
4934 | goto out; | |
4935 | } | |
4936 | ||
8552a434 | 4937 | if (!beacon->cntdwn_counter_offsets[0]) |
10d78f27 MK |
4938 | goto out; |
4939 | ||
8552a434 | 4940 | if (WARN_ON_ONCE(beacon->cntdwn_counter_offsets[0] > beacon_data_len)) |
73da7d5b SW |
4941 | goto out; |
4942 | ||
8552a434 | 4943 | if (beacon_data[beacon->cntdwn_counter_offsets[0]] == 1) |
73da7d5b | 4944 | ret = true; |
8552a434 | 4945 | |
73da7d5b SW |
4946 | out: |
4947 | rcu_read_unlock(); | |
4948 | ||
4949 | return ret; | |
4950 | } | |
8552a434 | 4951 | EXPORT_SYMBOL(ieee80211_beacon_cntdwn_is_complete); |
73da7d5b | 4952 | |
0a3a8436 JM |
4953 | static int ieee80211_beacon_protect(struct sk_buff *skb, |
4954 | struct ieee80211_local *local, | |
4955 | struct ieee80211_sub_if_data *sdata) | |
4956 | { | |
4957 | ieee80211_tx_result res; | |
4958 | struct ieee80211_tx_data tx; | |
95247705 | 4959 | struct sk_buff *check_skb; |
0a3a8436 JM |
4960 | |
4961 | memset(&tx, 0, sizeof(tx)); | |
4962 | tx.key = rcu_dereference(sdata->default_beacon_key); | |
4963 | if (!tx.key) | |
4964 | return 0; | |
4965 | tx.local = local; | |
4966 | tx.sdata = sdata; | |
4967 | __skb_queue_head_init(&tx.skbs); | |
4968 | __skb_queue_tail(&tx.skbs, skb); | |
4969 | res = ieee80211_tx_h_encrypt(&tx); | |
95247705 JB |
4970 | check_skb = __skb_dequeue(&tx.skbs); |
4971 | /* we may crash after this, but it'd be a bug in crypto */ | |
4972 | WARN_ON(check_skb != skb); | |
0a3a8436 | 4973 | if (WARN_ON_ONCE(res != TX_CONTINUE)) |
95247705 | 4974 | return -EINVAL; |
0a3a8436 JM |
4975 | |
4976 | return 0; | |
4977 | } | |
4978 | ||
a6e34fde AD |
4979 | static void |
4980 | ieee80211_beacon_get_finish(struct ieee80211_hw *hw, | |
4981 | struct ieee80211_vif *vif, | |
4982 | struct ieee80211_mutable_offsets *offs, | |
4983 | struct beacon_data *beacon, | |
4984 | struct sk_buff *skb, | |
4985 | struct ieee80211_chanctx_conf *chanctx_conf, | |
4986 | u16 csa_off_base) | |
4987 | { | |
4988 | struct ieee80211_local *local = hw_to_local(hw); | |
4989 | struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); | |
4990 | struct ieee80211_tx_info *info; | |
4991 | enum nl80211_band band; | |
4992 | struct ieee80211_tx_rate_control txrc; | |
4993 | ||
4994 | /* CSA offsets */ | |
4995 | if (offs && beacon) { | |
4996 | u16 i; | |
4997 | ||
4998 | for (i = 0; i < IEEE80211_MAX_CNTDWN_COUNTERS_NUM; i++) { | |
4999 | u16 csa_off = beacon->cntdwn_counter_offsets[i]; | |
5000 | ||
5001 | if (!csa_off) | |
5002 | continue; | |
5003 | ||
5004 | offs->cntdwn_counter_offs[i] = csa_off_base + csa_off; | |
5005 | } | |
5006 | } | |
5007 | ||
5008 | band = chanctx_conf->def.chan->band; | |
5009 | info = IEEE80211_SKB_CB(skb); | |
5010 | info->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT; | |
5011 | info->flags |= IEEE80211_TX_CTL_NO_ACK; | |
5012 | info->band = band; | |
5013 | ||
5014 | memset(&txrc, 0, sizeof(txrc)); | |
5015 | txrc.hw = hw; | |
5016 | txrc.sband = local->hw.wiphy->bands[band]; | |
5017 | txrc.bss_conf = &sdata->vif.bss_conf; | |
5018 | txrc.skb = skb; | |
5019 | txrc.reported_rate.idx = -1; | |
5020 | if (sdata->beacon_rate_set && sdata->beacon_rateidx_mask[band]) | |
5021 | txrc.rate_idx_mask = sdata->beacon_rateidx_mask[band]; | |
5022 | else | |
5023 | txrc.rate_idx_mask = sdata->rc_rateidx_mask[band]; | |
5024 | txrc.bss = true; | |
5025 | rate_control_get_rate(sdata, NULL, &txrc); | |
5026 | ||
5027 | info->control.vif = vif; | |
5028 | info->flags |= IEEE80211_TX_CTL_CLEAR_PS_FILT | | |
5029 | IEEE80211_TX_CTL_ASSIGN_SEQ | | |
5030 | IEEE80211_TX_CTL_FIRST_FRAGMENT; | |
5031 | } | |
5032 | ||
2b3171c6 LB |
5033 | static void |
5034 | ieee80211_beacon_add_mbssid(struct sk_buff *skb, struct beacon_data *beacon) | |
5035 | { | |
5036 | int i; | |
5037 | ||
5038 | if (!beacon->mbssid_ies) | |
5039 | return; | |
5040 | ||
5041 | for (i = 0; i < beacon->mbssid_ies->cnt; i++) | |
5042 | skb_put_data(skb, beacon->mbssid_ies->elem[i].data, | |
5043 | beacon->mbssid_ies->elem[i].len); | |
5044 | } | |
5045 | ||
a6e34fde AD |
5046 | static struct sk_buff * |
5047 | ieee80211_beacon_get_ap(struct ieee80211_hw *hw, | |
5048 | struct ieee80211_vif *vif, | |
5049 | struct ieee80211_mutable_offsets *offs, | |
5050 | bool is_template, | |
5051 | struct beacon_data *beacon, | |
5052 | struct ieee80211_chanctx_conf *chanctx_conf) | |
5053 | { | |
5054 | struct ieee80211_local *local = hw_to_local(hw); | |
5055 | struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); | |
5056 | struct ieee80211_if_ap *ap = &sdata->u.ap; | |
5057 | struct sk_buff *skb = NULL; | |
5058 | u16 csa_off_base = 0; | |
2b3171c6 | 5059 | int mbssid_len; |
a6e34fde AD |
5060 | |
5061 | if (beacon->cntdwn_counter_offsets[0]) { | |
5062 | if (!is_template) | |
5063 | ieee80211_beacon_update_cntdwn(vif); | |
5064 | ||
5065 | ieee80211_set_beacon_cntdwn(sdata, beacon); | |
5066 | } | |
5067 | ||
5068 | /* headroom, head length, | |
2b3171c6 | 5069 | * tail length, maximum TIM length and multiple BSSID length |
a6e34fde | 5070 | */ |
2b3171c6 | 5071 | mbssid_len = ieee80211_get_mbssid_beacon_len(beacon->mbssid_ies); |
a6e34fde AD |
5072 | skb = dev_alloc_skb(local->tx_headroom + beacon->head_len + |
5073 | beacon->tail_len + 256 + | |
2b3171c6 | 5074 | local->hw.extra_beacon_tailroom + mbssid_len); |
a6e34fde AD |
5075 | if (!skb) |
5076 | return NULL; | |
5077 | ||
5078 | skb_reserve(skb, local->tx_headroom); | |
5079 | skb_put_data(skb, beacon->head, beacon->head_len); | |
5080 | ||
5081 | ieee80211_beacon_add_tim(sdata, &ap->ps, skb, is_template); | |
5082 | ||
5083 | if (offs) { | |
5084 | offs->tim_offset = beacon->head_len; | |
5085 | offs->tim_length = skb->len - beacon->head_len; | |
5086 | offs->cntdwn_counter_offs[0] = beacon->cntdwn_counter_offsets[0]; | |
5087 | ||
2b3171c6 LB |
5088 | if (mbssid_len) { |
5089 | ieee80211_beacon_add_mbssid(skb, beacon); | |
5090 | offs->mbssid_off = skb->len - mbssid_len; | |
5091 | } | |
5092 | ||
a6e34fde AD |
5093 | /* for AP the csa offsets are from tail */ |
5094 | csa_off_base = skb->len; | |
5095 | } | |
5096 | ||
5097 | if (beacon->tail) | |
5098 | skb_put_data(skb, beacon->tail, beacon->tail_len); | |
5099 | ||
5100 | if (ieee80211_beacon_protect(skb, local, sdata) < 0) | |
5101 | return NULL; | |
5102 | ||
5103 | ieee80211_beacon_get_finish(hw, vif, offs, beacon, skb, chanctx_conf, | |
5104 | csa_off_base); | |
5105 | return skb; | |
5106 | } | |
5107 | ||
6ec8c332 AO |
5108 | static struct sk_buff * |
5109 | __ieee80211_beacon_get(struct ieee80211_hw *hw, | |
5110 | struct ieee80211_vif *vif, | |
5111 | struct ieee80211_mutable_offsets *offs, | |
5112 | bool is_template) | |
e2ebc74d JB |
5113 | { |
5114 | struct ieee80211_local *local = hw_to_local(hw); | |
af296bdb | 5115 | struct beacon_data *beacon = NULL; |
9d139c81 | 5116 | struct sk_buff *skb = NULL; |
e2ebc74d | 5117 | struct ieee80211_sub_if_data *sdata = NULL; |
55de908a | 5118 | struct ieee80211_chanctx_conf *chanctx_conf; |
8318d78a | 5119 | |
5dfdaf58 | 5120 | rcu_read_lock(); |
e2ebc74d | 5121 | |
32bfd35d | 5122 | sdata = vif_to_sdata(vif); |
55de908a | 5123 | chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf); |
e2ebc74d | 5124 | |
55de908a | 5125 | if (!ieee80211_sdata_running(sdata) || !chanctx_conf) |
eb3e554b FF |
5126 | goto out; |
5127 | ||
6ec8c332 AO |
5128 | if (offs) |
5129 | memset(offs, 0, sizeof(*offs)); | |
eddcbb94 | 5130 | |
05c914fe | 5131 | if (sdata->vif.type == NL80211_IFTYPE_AP) { |
d012a605 | 5132 | struct ieee80211_if_ap *ap = &sdata->u.ap; |
d012a605 | 5133 | |
af296bdb | 5134 | beacon = rcu_dereference(ap->beacon); |
a6e34fde | 5135 | if (!beacon) |
9d139c81 | 5136 | goto out; |
a6e34fde AD |
5137 | |
5138 | skb = ieee80211_beacon_get_ap(hw, vif, offs, is_template, | |
5139 | beacon, chanctx_conf); | |
05c914fe | 5140 | } else if (sdata->vif.type == NL80211_IFTYPE_ADHOC) { |
46900298 | 5141 | struct ieee80211_if_ibss *ifibss = &sdata->u.ibss; |
9d139c81 | 5142 | struct ieee80211_hdr *hdr; |
33b64eb2 | 5143 | |
af296bdb MK |
5144 | beacon = rcu_dereference(ifibss->presp); |
5145 | if (!beacon) | |
9d139c81 JB |
5146 | goto out; |
5147 | ||
8552a434 | 5148 | if (beacon->cntdwn_counter_offsets[0]) { |
1af586c9 | 5149 | if (!is_template) |
8552a434 | 5150 | __ieee80211_beacon_update_cntdwn(beacon); |
cd7760e6 | 5151 | |
8552a434 | 5152 | ieee80211_set_beacon_cntdwn(sdata, beacon); |
1af586c9 | 5153 | } |
cd7760e6 | 5154 | |
af296bdb | 5155 | skb = dev_alloc_skb(local->tx_headroom + beacon->head_len + |
70dabeb7 | 5156 | local->hw.extra_beacon_tailroom); |
9d139c81 JB |
5157 | if (!skb) |
5158 | goto out; | |
c3ffeab4 | 5159 | skb_reserve(skb, local->tx_headroom); |
59ae1d12 | 5160 | skb_put_data(skb, beacon->head, beacon->head_len); |
9d139c81 JB |
5161 | |
5162 | hdr = (struct ieee80211_hdr *) skb->data; | |
e7827a70 HH |
5163 | hdr->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | |
5164 | IEEE80211_STYPE_BEACON); | |
a6e34fde AD |
5165 | |
5166 | ieee80211_beacon_get_finish(hw, vif, offs, beacon, skb, | |
5167 | chanctx_conf, 0); | |
902acc78 | 5168 | } else if (ieee80211_vif_is_mesh(&sdata->vif)) { |
dbf498fb | 5169 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; |
472dbc45 | 5170 | |
af296bdb MK |
5171 | beacon = rcu_dereference(ifmsh->beacon); |
5172 | if (!beacon) | |
ac1bd846 | 5173 | goto out; |
ac1bd846 | 5174 | |
8552a434 | 5175 | if (beacon->cntdwn_counter_offsets[0]) { |
1af586c9 AO |
5176 | if (!is_template) |
5177 | /* TODO: For mesh csa_counter is in TU, so | |
5178 | * decrementing it by one isn't correct, but | |
5179 | * for now we leave it consistent with overall | |
5180 | * mac80211's behavior. | |
5181 | */ | |
8552a434 | 5182 | __ieee80211_beacon_update_cntdwn(beacon); |
1af586c9 | 5183 | |
8552a434 | 5184 | ieee80211_set_beacon_cntdwn(sdata, beacon); |
1af586c9 | 5185 | } |
b8456a14 | 5186 | |
dbf498fb | 5187 | if (ifmsh->sync_ops) |
445cd452 | 5188 | ifmsh->sync_ops->adjust_tsf(sdata, beacon); |
dbf498fb | 5189 | |
3b69a9c5 | 5190 | skb = dev_alloc_skb(local->tx_headroom + |
af296bdb | 5191 | beacon->head_len + |
3f52b7e3 | 5192 | 256 + /* TIM IE */ |
af296bdb | 5193 | beacon->tail_len + |
70dabeb7 | 5194 | local->hw.extra_beacon_tailroom); |
902acc78 JB |
5195 | if (!skb) |
5196 | goto out; | |
2b5e1967 | 5197 | skb_reserve(skb, local->tx_headroom); |
59ae1d12 | 5198 | skb_put_data(skb, beacon->head, beacon->head_len); |
6ec8c332 AO |
5199 | ieee80211_beacon_add_tim(sdata, &ifmsh->ps, skb, is_template); |
5200 | ||
5201 | if (offs) { | |
af296bdb MK |
5202 | offs->tim_offset = beacon->head_len; |
5203 | offs->tim_length = skb->len - beacon->head_len; | |
6ec8c332 AO |
5204 | } |
5205 | ||
59ae1d12 | 5206 | skb_put_data(skb, beacon->tail, beacon->tail_len); |
a6e34fde AD |
5207 | ieee80211_beacon_get_finish(hw, vif, offs, beacon, skb, |
5208 | chanctx_conf, 0); | |
9d139c81 JB |
5209 | } else { |
5210 | WARN_ON(1); | |
5dfdaf58 | 5211 | goto out; |
e2ebc74d JB |
5212 | } |
5213 | ||
e6a9854b | 5214 | out: |
5dfdaf58 | 5215 | rcu_read_unlock(); |
e2ebc74d | 5216 | return skb; |
6ec8c332 AO |
5217 | |
5218 | } | |
5219 | ||
5220 | struct sk_buff * | |
5221 | ieee80211_beacon_get_template(struct ieee80211_hw *hw, | |
5222 | struct ieee80211_vif *vif, | |
5223 | struct ieee80211_mutable_offsets *offs) | |
5224 | { | |
5225 | return __ieee80211_beacon_get(hw, vif, offs, true); | |
5226 | } | |
5227 | EXPORT_SYMBOL(ieee80211_beacon_get_template); | |
5228 | ||
5229 | struct sk_buff *ieee80211_beacon_get_tim(struct ieee80211_hw *hw, | |
5230 | struct ieee80211_vif *vif, | |
5231 | u16 *tim_offset, u16 *tim_length) | |
5232 | { | |
5233 | struct ieee80211_mutable_offsets offs = {}; | |
5234 | struct sk_buff *bcn = __ieee80211_beacon_get(hw, vif, &offs, false); | |
35afa588 HS |
5235 | struct sk_buff *copy; |
5236 | struct ieee80211_supported_band *sband; | |
5237 | int shift; | |
5238 | ||
5239 | if (!bcn) | |
5240 | return bcn; | |
6ec8c332 AO |
5241 | |
5242 | if (tim_offset) | |
5243 | *tim_offset = offs.tim_offset; | |
5244 | ||
5245 | if (tim_length) | |
5246 | *tim_length = offs.tim_length; | |
5247 | ||
35afa588 HS |
5248 | if (ieee80211_hw_check(hw, BEACON_TX_STATUS) || |
5249 | !hw_to_local(hw)->monitors) | |
5250 | return bcn; | |
5251 | ||
5252 | /* send a copy to monitor interfaces */ | |
5253 | copy = skb_copy(bcn, GFP_ATOMIC); | |
5254 | if (!copy) | |
5255 | return bcn; | |
5256 | ||
5257 | shift = ieee80211_vif_get_shift(vif); | |
21a8e9dd MSS |
5258 | sband = ieee80211_get_sband(vif_to_sdata(vif)); |
5259 | if (!sband) | |
5260 | return bcn; | |
5261 | ||
b7b2e8ca JC |
5262 | ieee80211_tx_monitor(hw_to_local(hw), copy, sband, 1, shift, false, |
5263 | NULL); | |
35afa588 | 5264 | |
6ec8c332 | 5265 | return bcn; |
e2ebc74d | 5266 | } |
eddcbb94 | 5267 | EXPORT_SYMBOL(ieee80211_beacon_get_tim); |
e2ebc74d | 5268 | |
02945821 AN |
5269 | struct sk_buff *ieee80211_proberesp_get(struct ieee80211_hw *hw, |
5270 | struct ieee80211_vif *vif) | |
5271 | { | |
5272 | struct ieee80211_if_ap *ap = NULL; | |
aa7a0080 ES |
5273 | struct sk_buff *skb = NULL; |
5274 | struct probe_resp *presp = NULL; | |
02945821 AN |
5275 | struct ieee80211_hdr *hdr; |
5276 | struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); | |
5277 | ||
5278 | if (sdata->vif.type != NL80211_IFTYPE_AP) | |
5279 | return NULL; | |
5280 | ||
5281 | rcu_read_lock(); | |
5282 | ||
5283 | ap = &sdata->u.ap; | |
5284 | presp = rcu_dereference(ap->probe_resp); | |
5285 | if (!presp) | |
5286 | goto out; | |
5287 | ||
aa7a0080 | 5288 | skb = dev_alloc_skb(presp->len); |
02945821 AN |
5289 | if (!skb) |
5290 | goto out; | |
5291 | ||
59ae1d12 | 5292 | skb_put_data(skb, presp->data, presp->len); |
aa7a0080 | 5293 | |
02945821 AN |
5294 | hdr = (struct ieee80211_hdr *) skb->data; |
5295 | memset(hdr->addr1, 0, sizeof(hdr->addr1)); | |
5296 | ||
5297 | out: | |
5298 | rcu_read_unlock(); | |
5299 | return skb; | |
5300 | } | |
5301 | EXPORT_SYMBOL(ieee80211_proberesp_get); | |
5302 | ||
295b02c4 AD |
5303 | struct sk_buff *ieee80211_get_fils_discovery_tmpl(struct ieee80211_hw *hw, |
5304 | struct ieee80211_vif *vif) | |
5305 | { | |
5306 | struct sk_buff *skb = NULL; | |
5307 | struct fils_discovery_data *tmpl = NULL; | |
5308 | struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); | |
5309 | ||
5310 | if (sdata->vif.type != NL80211_IFTYPE_AP) | |
5311 | return NULL; | |
5312 | ||
5313 | rcu_read_lock(); | |
5314 | tmpl = rcu_dereference(sdata->u.ap.fils_discovery); | |
5315 | if (!tmpl) { | |
5316 | rcu_read_unlock(); | |
5317 | return NULL; | |
5318 | } | |
5319 | ||
5320 | skb = dev_alloc_skb(sdata->local->hw.extra_tx_headroom + tmpl->len); | |
5321 | if (skb) { | |
5322 | skb_reserve(skb, sdata->local->hw.extra_tx_headroom); | |
5323 | skb_put_data(skb, tmpl->data, tmpl->len); | |
5324 | } | |
5325 | ||
5326 | rcu_read_unlock(); | |
5327 | return skb; | |
5328 | } | |
5329 | EXPORT_SYMBOL(ieee80211_get_fils_discovery_tmpl); | |
5330 | ||
632189a0 AD |
5331 | struct sk_buff * |
5332 | ieee80211_get_unsol_bcast_probe_resp_tmpl(struct ieee80211_hw *hw, | |
5333 | struct ieee80211_vif *vif) | |
5334 | { | |
5335 | struct sk_buff *skb = NULL; | |
5336 | struct unsol_bcast_probe_resp_data *tmpl = NULL; | |
5337 | struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); | |
5338 | ||
5339 | if (sdata->vif.type != NL80211_IFTYPE_AP) | |
5340 | return NULL; | |
5341 | ||
5342 | rcu_read_lock(); | |
5343 | tmpl = rcu_dereference(sdata->u.ap.unsol_bcast_probe_resp); | |
5344 | if (!tmpl) { | |
5345 | rcu_read_unlock(); | |
5346 | return NULL; | |
5347 | } | |
5348 | ||
5349 | skb = dev_alloc_skb(sdata->local->hw.extra_tx_headroom + tmpl->len); | |
5350 | if (skb) { | |
5351 | skb_reserve(skb, sdata->local->hw.extra_tx_headroom); | |
5352 | skb_put_data(skb, tmpl->data, tmpl->len); | |
5353 | } | |
5354 | ||
5355 | rcu_read_unlock(); | |
5356 | return skb; | |
5357 | } | |
5358 | EXPORT_SYMBOL(ieee80211_get_unsol_bcast_probe_resp_tmpl); | |
5359 | ||
7044cc56 KV |
5360 | struct sk_buff *ieee80211_pspoll_get(struct ieee80211_hw *hw, |
5361 | struct ieee80211_vif *vif) | |
5362 | { | |
5363 | struct ieee80211_sub_if_data *sdata; | |
5364 | struct ieee80211_if_managed *ifmgd; | |
5365 | struct ieee80211_pspoll *pspoll; | |
5366 | struct ieee80211_local *local; | |
5367 | struct sk_buff *skb; | |
5368 | ||
5369 | if (WARN_ON(vif->type != NL80211_IFTYPE_STATION)) | |
5370 | return NULL; | |
5371 | ||
5372 | sdata = vif_to_sdata(vif); | |
5373 | ifmgd = &sdata->u.mgd; | |
5374 | local = sdata->local; | |
5375 | ||
5376 | skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*pspoll)); | |
d15b8459 | 5377 | if (!skb) |
7044cc56 | 5378 | return NULL; |
d15b8459 | 5379 | |
7044cc56 KV |
5380 | skb_reserve(skb, local->hw.extra_tx_headroom); |
5381 | ||
b080db58 | 5382 | pspoll = skb_put_zero(skb, sizeof(*pspoll)); |
7044cc56 KV |
5383 | pspoll->frame_control = cpu_to_le16(IEEE80211_FTYPE_CTL | |
5384 | IEEE80211_STYPE_PSPOLL); | |
1db364c8 | 5385 | pspoll->aid = cpu_to_le16(sdata->vif.bss_conf.aid); |
7044cc56 KV |
5386 | |
5387 | /* aid in PS-Poll has its two MSBs each set to 1 */ | |
5388 | pspoll->aid |= cpu_to_le16(1 << 15 | 1 << 14); | |
5389 | ||
5390 | memcpy(pspoll->bssid, ifmgd->bssid, ETH_ALEN); | |
5391 | memcpy(pspoll->ta, vif->addr, ETH_ALEN); | |
5392 | ||
5393 | return skb; | |
5394 | } | |
5395 | EXPORT_SYMBOL(ieee80211_pspoll_get); | |
5396 | ||
5397 | struct sk_buff *ieee80211_nullfunc_get(struct ieee80211_hw *hw, | |
7b6ddeaf JB |
5398 | struct ieee80211_vif *vif, |
5399 | bool qos_ok) | |
7044cc56 KV |
5400 | { |
5401 | struct ieee80211_hdr_3addr *nullfunc; | |
5402 | struct ieee80211_sub_if_data *sdata; | |
5403 | struct ieee80211_if_managed *ifmgd; | |
5404 | struct ieee80211_local *local; | |
5405 | struct sk_buff *skb; | |
7b6ddeaf | 5406 | bool qos = false; |
7044cc56 KV |
5407 | |
5408 | if (WARN_ON(vif->type != NL80211_IFTYPE_STATION)) | |
5409 | return NULL; | |
5410 | ||
5411 | sdata = vif_to_sdata(vif); | |
5412 | ifmgd = &sdata->u.mgd; | |
5413 | local = sdata->local; | |
5414 | ||
7b6ddeaf JB |
5415 | if (qos_ok) { |
5416 | struct sta_info *sta; | |
5417 | ||
5418 | rcu_read_lock(); | |
5419 | sta = sta_info_get(sdata, ifmgd->bssid); | |
5420 | qos = sta && sta->sta.wme; | |
5421 | rcu_read_unlock(); | |
5422 | } | |
5423 | ||
5424 | skb = dev_alloc_skb(local->hw.extra_tx_headroom + | |
5425 | sizeof(*nullfunc) + 2); | |
d15b8459 | 5426 | if (!skb) |
7044cc56 | 5427 | return NULL; |
d15b8459 | 5428 | |
7044cc56 KV |
5429 | skb_reserve(skb, local->hw.extra_tx_headroom); |
5430 | ||
b080db58 | 5431 | nullfunc = skb_put_zero(skb, sizeof(*nullfunc)); |
7044cc56 KV |
5432 | nullfunc->frame_control = cpu_to_le16(IEEE80211_FTYPE_DATA | |
5433 | IEEE80211_STYPE_NULLFUNC | | |
5434 | IEEE80211_FCTL_TODS); | |
7b6ddeaf | 5435 | if (qos) { |
e0ba7095 | 5436 | __le16 qoshdr = cpu_to_le16(7); |
7b6ddeaf JB |
5437 | |
5438 | BUILD_BUG_ON((IEEE80211_STYPE_QOS_NULLFUNC | | |
5439 | IEEE80211_STYPE_NULLFUNC) != | |
5440 | IEEE80211_STYPE_QOS_NULLFUNC); | |
5441 | nullfunc->frame_control |= | |
5442 | cpu_to_le16(IEEE80211_STYPE_QOS_NULLFUNC); | |
5443 | skb->priority = 7; | |
5444 | skb_set_queue_mapping(skb, IEEE80211_AC_VO); | |
e0ba7095 | 5445 | skb_put_data(skb, &qoshdr, sizeof(qoshdr)); |
7b6ddeaf JB |
5446 | } |
5447 | ||
7044cc56 KV |
5448 | memcpy(nullfunc->addr1, ifmgd->bssid, ETH_ALEN); |
5449 | memcpy(nullfunc->addr2, vif->addr, ETH_ALEN); | |
5450 | memcpy(nullfunc->addr3, ifmgd->bssid, ETH_ALEN); | |
5451 | ||
5452 | return skb; | |
5453 | } | |
5454 | EXPORT_SYMBOL(ieee80211_nullfunc_get); | |
5455 | ||
05e54ea6 | 5456 | struct sk_buff *ieee80211_probereq_get(struct ieee80211_hw *hw, |
a344d677 | 5457 | const u8 *src_addr, |
05e54ea6 | 5458 | const u8 *ssid, size_t ssid_len, |
b9a9ada1 | 5459 | size_t tailroom) |
05e54ea6 | 5460 | { |
a344d677 | 5461 | struct ieee80211_local *local = hw_to_local(hw); |
05e54ea6 KV |
5462 | struct ieee80211_hdr_3addr *hdr; |
5463 | struct sk_buff *skb; | |
5464 | size_t ie_ssid_len; | |
5465 | u8 *pos; | |
5466 | ||
05e54ea6 KV |
5467 | ie_ssid_len = 2 + ssid_len; |
5468 | ||
5469 | skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*hdr) + | |
b9a9ada1 | 5470 | ie_ssid_len + tailroom); |
d15b8459 | 5471 | if (!skb) |
05e54ea6 | 5472 | return NULL; |
05e54ea6 KV |
5473 | |
5474 | skb_reserve(skb, local->hw.extra_tx_headroom); | |
5475 | ||
b080db58 | 5476 | hdr = skb_put_zero(skb, sizeof(*hdr)); |
05e54ea6 KV |
5477 | hdr->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | |
5478 | IEEE80211_STYPE_PROBE_REQ); | |
e83e6541 | 5479 | eth_broadcast_addr(hdr->addr1); |
a344d677 | 5480 | memcpy(hdr->addr2, src_addr, ETH_ALEN); |
e83e6541 | 5481 | eth_broadcast_addr(hdr->addr3); |
05e54ea6 KV |
5482 | |
5483 | pos = skb_put(skb, ie_ssid_len); | |
5484 | *pos++ = WLAN_EID_SSID; | |
5485 | *pos++ = ssid_len; | |
88c868c4 | 5486 | if (ssid_len) |
05e54ea6 KV |
5487 | memcpy(pos, ssid, ssid_len); |
5488 | pos += ssid_len; | |
5489 | ||
05e54ea6 KV |
5490 | return skb; |
5491 | } | |
5492 | EXPORT_SYMBOL(ieee80211_probereq_get); | |
5493 | ||
32bfd35d | 5494 | void ieee80211_rts_get(struct ieee80211_hw *hw, struct ieee80211_vif *vif, |
e2ebc74d | 5495 | const void *frame, size_t frame_len, |
e039fa4a | 5496 | const struct ieee80211_tx_info *frame_txctl, |
e2ebc74d JB |
5497 | struct ieee80211_rts *rts) |
5498 | { | |
5499 | const struct ieee80211_hdr *hdr = frame; | |
e2ebc74d | 5500 | |
065e9605 HH |
5501 | rts->frame_control = |
5502 | cpu_to_le16(IEEE80211_FTYPE_CTL | IEEE80211_STYPE_RTS); | |
32bfd35d JB |
5503 | rts->duration = ieee80211_rts_duration(hw, vif, frame_len, |
5504 | frame_txctl); | |
e2ebc74d JB |
5505 | memcpy(rts->ra, hdr->addr1, sizeof(rts->ra)); |
5506 | memcpy(rts->ta, hdr->addr2, sizeof(rts->ta)); | |
5507 | } | |
5508 | EXPORT_SYMBOL(ieee80211_rts_get); | |
5509 | ||
32bfd35d | 5510 | void ieee80211_ctstoself_get(struct ieee80211_hw *hw, struct ieee80211_vif *vif, |
e2ebc74d | 5511 | const void *frame, size_t frame_len, |
e039fa4a | 5512 | const struct ieee80211_tx_info *frame_txctl, |
e2ebc74d JB |
5513 | struct ieee80211_cts *cts) |
5514 | { | |
5515 | const struct ieee80211_hdr *hdr = frame; | |
e2ebc74d | 5516 | |
065e9605 HH |
5517 | cts->frame_control = |
5518 | cpu_to_le16(IEEE80211_FTYPE_CTL | IEEE80211_STYPE_CTS); | |
32bfd35d JB |
5519 | cts->duration = ieee80211_ctstoself_duration(hw, vif, |
5520 | frame_len, frame_txctl); | |
e2ebc74d JB |
5521 | memcpy(cts->ra, hdr->addr1, sizeof(cts->ra)); |
5522 | } | |
5523 | EXPORT_SYMBOL(ieee80211_ctstoself_get); | |
5524 | ||
5525 | struct sk_buff * | |
32bfd35d | 5526 | ieee80211_get_buffered_bc(struct ieee80211_hw *hw, |
e039fa4a | 5527 | struct ieee80211_vif *vif) |
e2ebc74d JB |
5528 | { |
5529 | struct ieee80211_local *local = hw_to_local(hw); | |
747cf5e9 | 5530 | struct sk_buff *skb = NULL; |
5cf121c3 | 5531 | struct ieee80211_tx_data tx; |
e2ebc74d | 5532 | struct ieee80211_sub_if_data *sdata; |
d012a605 | 5533 | struct ps_data *ps; |
e039fa4a | 5534 | struct ieee80211_tx_info *info; |
55de908a | 5535 | struct ieee80211_chanctx_conf *chanctx_conf; |
e2ebc74d | 5536 | |
32bfd35d | 5537 | sdata = vif_to_sdata(vif); |
5dfdaf58 | 5538 | |
5dfdaf58 | 5539 | rcu_read_lock(); |
55de908a | 5540 | chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf); |
5dfdaf58 | 5541 | |
d012a605 MP |
5542 | if (!chanctx_conf) |
5543 | goto out; | |
5544 | ||
5545 | if (sdata->vif.type == NL80211_IFTYPE_AP) { | |
5546 | struct beacon_data *beacon = | |
5547 | rcu_dereference(sdata->u.ap.beacon); | |
5548 | ||
5549 | if (!beacon || !beacon->head) | |
5550 | goto out; | |
5551 | ||
5552 | ps = &sdata->u.ap.ps; | |
3f52b7e3 MP |
5553 | } else if (ieee80211_vif_is_mesh(&sdata->vif)) { |
5554 | ps = &sdata->u.mesh.ps; | |
d012a605 | 5555 | } else { |
747cf5e9 | 5556 | goto out; |
d012a605 | 5557 | } |
5dfdaf58 | 5558 | |
d012a605 | 5559 | if (ps->dtim_count != 0 || !ps->dtim_bc_mc) |
747cf5e9 | 5560 | goto out; /* send buffered bc/mc only after DTIM beacon */ |
e039fa4a | 5561 | |
e2ebc74d | 5562 | while (1) { |
d012a605 | 5563 | skb = skb_dequeue(&ps->bc_buf); |
e2ebc74d | 5564 | if (!skb) |
747cf5e9 | 5565 | goto out; |
e2ebc74d JB |
5566 | local->total_ps_buffered--; |
5567 | ||
d012a605 | 5568 | if (!skb_queue_empty(&ps->bc_buf) && skb->len >= 2) { |
e2ebc74d JB |
5569 | struct ieee80211_hdr *hdr = |
5570 | (struct ieee80211_hdr *) skb->data; | |
5571 | /* more buffered multicast/broadcast frames ==> set | |
5572 | * MoreData flag in IEEE 802.11 header to inform PS | |
5573 | * STAs */ | |
5574 | hdr->frame_control |= | |
5575 | cpu_to_le16(IEEE80211_FCTL_MOREDATA); | |
5576 | } | |
5577 | ||
112c44b2 | 5578 | if (sdata->vif.type == NL80211_IFTYPE_AP) |
7cbf9d01 | 5579 | sdata = IEEE80211_DEV_TO_SUB_IF(skb->dev); |
7c10770f | 5580 | if (!ieee80211_tx_prepare(sdata, &tx, NULL, skb)) |
e2ebc74d | 5581 | break; |
6b07d9ca | 5582 | ieee80211_free_txskb(hw, skb); |
e2ebc74d | 5583 | } |
e039fa4a JB |
5584 | |
5585 | info = IEEE80211_SKB_CB(skb); | |
5586 | ||
5cf121c3 | 5587 | tx.flags |= IEEE80211_TX_PS_BUFFERED; |
4bf88530 | 5588 | info->band = chanctx_conf->def.chan->band; |
e2ebc74d | 5589 | |
97b045d6 | 5590 | if (invoke_tx_handlers(&tx)) |
e2ebc74d | 5591 | skb = NULL; |
97b045d6 | 5592 | out: |
d0709a65 | 5593 | rcu_read_unlock(); |
e2ebc74d JB |
5594 | |
5595 | return skb; | |
5596 | } | |
5597 | EXPORT_SYMBOL(ieee80211_get_buffered_bc); | |
3b8d81e0 | 5598 | |
b6da911b LK |
5599 | int ieee80211_reserve_tid(struct ieee80211_sta *pubsta, u8 tid) |
5600 | { | |
5601 | struct sta_info *sta = container_of(pubsta, struct sta_info, sta); | |
5602 | struct ieee80211_sub_if_data *sdata = sta->sdata; | |
5603 | struct ieee80211_local *local = sdata->local; | |
5604 | int ret; | |
5605 | u32 queues; | |
5606 | ||
5607 | lockdep_assert_held(&local->sta_mtx); | |
5608 | ||
5609 | /* only some cases are supported right now */ | |
5610 | switch (sdata->vif.type) { | |
5611 | case NL80211_IFTYPE_STATION: | |
5612 | case NL80211_IFTYPE_AP: | |
5613 | case NL80211_IFTYPE_AP_VLAN: | |
5614 | break; | |
5615 | default: | |
5616 | WARN_ON(1); | |
5617 | return -EINVAL; | |
5618 | } | |
5619 | ||
5620 | if (WARN_ON(tid >= IEEE80211_NUM_UPS)) | |
5621 | return -EINVAL; | |
5622 | ||
5623 | if (sta->reserved_tid == tid) { | |
5624 | ret = 0; | |
5625 | goto out; | |
5626 | } | |
5627 | ||
5628 | if (sta->reserved_tid != IEEE80211_TID_UNRESERVED) { | |
5629 | sdata_err(sdata, "TID reservation already active\n"); | |
5630 | ret = -EALREADY; | |
5631 | goto out; | |
5632 | } | |
5633 | ||
5634 | ieee80211_stop_vif_queues(sdata->local, sdata, | |
5635 | IEEE80211_QUEUE_STOP_REASON_RESERVE_TID); | |
5636 | ||
5637 | synchronize_net(); | |
5638 | ||
5639 | /* Tear down BA sessions so we stop aggregating on this TID */ | |
30686bf7 | 5640 | if (ieee80211_hw_check(&local->hw, AMPDU_AGGREGATION)) { |
b6da911b LK |
5641 | set_sta_flag(sta, WLAN_STA_BLOCK_BA); |
5642 | __ieee80211_stop_tx_ba_session(sta, tid, | |
5643 | AGG_STOP_LOCAL_REQUEST); | |
5644 | } | |
5645 | ||
5646 | queues = BIT(sdata->vif.hw_queue[ieee802_1d_to_ac[tid]]); | |
3b24f4c6 | 5647 | __ieee80211_flush_queues(local, sdata, queues, false); |
b6da911b LK |
5648 | |
5649 | sta->reserved_tid = tid; | |
5650 | ||
5651 | ieee80211_wake_vif_queues(local, sdata, | |
5652 | IEEE80211_QUEUE_STOP_REASON_RESERVE_TID); | |
5653 | ||
30686bf7 | 5654 | if (ieee80211_hw_check(&local->hw, AMPDU_AGGREGATION)) |
b6da911b LK |
5655 | clear_sta_flag(sta, WLAN_STA_BLOCK_BA); |
5656 | ||
5657 | ret = 0; | |
5658 | out: | |
5659 | return ret; | |
5660 | } | |
5661 | EXPORT_SYMBOL(ieee80211_reserve_tid); | |
5662 | ||
5663 | void ieee80211_unreserve_tid(struct ieee80211_sta *pubsta, u8 tid) | |
5664 | { | |
5665 | struct sta_info *sta = container_of(pubsta, struct sta_info, sta); | |
5666 | struct ieee80211_sub_if_data *sdata = sta->sdata; | |
5667 | ||
5668 | lockdep_assert_held(&sdata->local->sta_mtx); | |
5669 | ||
5670 | /* only some cases are supported right now */ | |
5671 | switch (sdata->vif.type) { | |
5672 | case NL80211_IFTYPE_STATION: | |
5673 | case NL80211_IFTYPE_AP: | |
5674 | case NL80211_IFTYPE_AP_VLAN: | |
5675 | break; | |
5676 | default: | |
5677 | WARN_ON(1); | |
5678 | return; | |
5679 | } | |
5680 | ||
5681 | if (tid != sta->reserved_tid) { | |
5682 | sdata_err(sdata, "TID to unreserve (%d) isn't reserved\n", tid); | |
5683 | return; | |
5684 | } | |
5685 | ||
5686 | sta->reserved_tid = IEEE80211_TID_UNRESERVED; | |
5687 | } | |
5688 | EXPORT_SYMBOL(ieee80211_unreserve_tid); | |
5689 | ||
55de908a JB |
5690 | void __ieee80211_tx_skb_tid_band(struct ieee80211_sub_if_data *sdata, |
5691 | struct sk_buff *skb, int tid, | |
08aca29a | 5692 | enum nl80211_band band) |
3b8d81e0 | 5693 | { |
731977e9 | 5694 | int ac = ieee80211_ac_from_tid(tid); |
3a25a8c8 | 5695 | |
d57a544d | 5696 | skb_reset_mac_header(skb); |
3a25a8c8 | 5697 | skb_set_queue_mapping(skb, ac); |
cf6bb79a | 5698 | skb->priority = tid; |
cf0277e7 | 5699 | |
89afe614 JB |
5700 | skb->dev = sdata->dev; |
5701 | ||
3d34deb6 JB |
5702 | /* |
5703 | * The other path calling ieee80211_xmit is from the tasklet, | |
5704 | * and while we can handle concurrent transmissions locking | |
5705 | * requirements are that we do not come into tx with bhs on. | |
5706 | */ | |
5707 | local_bh_disable(); | |
73c4e195 | 5708 | IEEE80211_SKB_CB(skb)->band = band; |
08aca29a | 5709 | ieee80211_xmit(sdata, NULL, skb); |
3d34deb6 | 5710 | local_bh_enable(); |
3b8d81e0 | 5711 | } |
91180649 DK |
5712 | |
5713 | int ieee80211_tx_control_port(struct wiphy *wiphy, struct net_device *dev, | |
5714 | const u8 *buf, size_t len, | |
dca9ca2d MT |
5715 | const u8 *dest, __be16 proto, bool unencrypted, |
5716 | u64 *cookie) | |
91180649 DK |
5717 | { |
5718 | struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); | |
5719 | struct ieee80211_local *local = sdata->local; | |
10cb8e61 | 5720 | struct sta_info *sta; |
91180649 DK |
5721 | struct sk_buff *skb; |
5722 | struct ethhdr *ehdr; | |
b95d2ccd | 5723 | u32 ctrl_flags = 0; |
a7528198 | 5724 | u32 flags = 0; |
91180649 DK |
5725 | |
5726 | /* Only accept CONTROL_PORT_PROTOCOL configured in CONNECT/ASSOCIATE | |
5727 | * or Pre-Authentication | |
5728 | */ | |
5729 | if (proto != sdata->control_port_protocol && | |
5730 | proto != cpu_to_be16(ETH_P_PREAUTH)) | |
5731 | return -EINVAL; | |
5732 | ||
b95d2ccd | 5733 | if (proto == sdata->control_port_protocol) |
5af7fef3 MT |
5734 | ctrl_flags |= IEEE80211_TX_CTRL_PORT_CTRL_PROTO | |
5735 | IEEE80211_TX_CTRL_SKIP_MPATH_LOOKUP; | |
b95d2ccd | 5736 | |
91180649 | 5737 | if (unencrypted) |
a7528198 MT |
5738 | flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT; |
5739 | ||
5740 | if (cookie) | |
5741 | ctrl_flags |= IEEE80211_TX_CTL_REQ_TX_STATUS; | |
5742 | ||
10cb8e61 | 5743 | flags |= IEEE80211_TX_INTFL_NL80211_FRAME_TX; |
91180649 DK |
5744 | |
5745 | skb = dev_alloc_skb(local->hw.extra_tx_headroom + | |
5746 | sizeof(struct ethhdr) + len); | |
5747 | if (!skb) | |
5748 | return -ENOMEM; | |
5749 | ||
5750 | skb_reserve(skb, local->hw.extra_tx_headroom + sizeof(struct ethhdr)); | |
5751 | ||
5752 | skb_put_data(skb, buf, len); | |
5753 | ||
5754 | ehdr = skb_push(skb, sizeof(struct ethhdr)); | |
5755 | memcpy(ehdr->h_dest, dest, ETH_ALEN); | |
8079e4fe | 5756 | memcpy(ehdr->h_source, sdata->vif.addr, ETH_ALEN); |
91180649 DK |
5757 | ehdr->h_proto = proto; |
5758 | ||
5759 | skb->dev = dev; | |
10cb8e61 | 5760 | skb->protocol = proto; |
91180649 DK |
5761 | skb_reset_network_header(skb); |
5762 | skb_reset_mac_header(skb); | |
5763 | ||
10cb8e61 MT |
5764 | /* update QoS header to prioritize control port frames if possible, |
5765 | * priorization also happens for control port frames send over | |
5766 | * AF_PACKET | |
5767 | */ | |
5768 | rcu_read_lock(); | |
5769 | ||
5770 | if (ieee80211_lookup_ra_sta(sdata, skb, &sta) == 0 && !IS_ERR(sta)) { | |
5771 | u16 queue = __ieee80211_select_queue(sdata, sta, skb); | |
5772 | ||
5773 | skb_set_queue_mapping(skb, queue); | |
5774 | skb_get_hash(skb); | |
5775 | } | |
5776 | ||
5777 | rcu_read_unlock(); | |
5778 | ||
a7528198 MT |
5779 | /* mutex lock is only needed for incrementing the cookie counter */ |
5780 | mutex_lock(&local->mtx); | |
5781 | ||
e7441c92 | 5782 | local_bh_disable(); |
a7528198 | 5783 | __ieee80211_subif_start_xmit(skb, skb->dev, flags, ctrl_flags, cookie); |
e7441c92 | 5784 | local_bh_enable(); |
91180649 | 5785 | |
a7528198 MT |
5786 | mutex_unlock(&local->mtx); |
5787 | ||
91180649 DK |
5788 | return 0; |
5789 | } | |
8828f81a RM |
5790 | |
5791 | int ieee80211_probe_mesh_link(struct wiphy *wiphy, struct net_device *dev, | |
5792 | const u8 *buf, size_t len) | |
5793 | { | |
5794 | struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); | |
5795 | struct ieee80211_local *local = sdata->local; | |
5796 | struct sk_buff *skb; | |
5797 | ||
5798 | skb = dev_alloc_skb(local->hw.extra_tx_headroom + len + | |
5799 | 30 + /* header size */ | |
5800 | 18); /* 11s header size */ | |
5801 | if (!skb) | |
5802 | return -ENOMEM; | |
5803 | ||
5804 | skb_reserve(skb, local->hw.extra_tx_headroom); | |
5805 | skb_put_data(skb, buf, len); | |
5806 | ||
5807 | skb->dev = dev; | |
5808 | skb->protocol = htons(ETH_P_802_3); | |
5809 | skb_reset_network_header(skb); | |
5810 | skb_reset_mac_header(skb); | |
5811 | ||
5812 | local_bh_disable(); | |
5813 | __ieee80211_subif_start_xmit(skb, skb->dev, 0, | |
a7528198 MT |
5814 | IEEE80211_TX_CTRL_SKIP_MPATH_LOOKUP, |
5815 | NULL); | |
e7441c92 | 5816 | local_bh_enable(); |
91180649 DK |
5817 | |
5818 | return 0; | |
5819 | } |