1 // SPDX-License-Identifier: GPL-2.0-only
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>
7 * Copyright 2013-2014 Intel Mobile Communications GmbH
8 * Copyright (C) 2018-2022 Intel Corporation
10 * Transmit and frame generation functions.
13 #include <linux/kernel.h>
14 #include <linux/slab.h>
15 #include <linux/skbuff.h>
16 #include <linux/if_vlan.h>
17 #include <linux/etherdevice.h>
18 #include <linux/bitmap.h>
19 #include <linux/rcupdate.h>
20 #include <linux/export.h>
21 #include <linux/timekeeping.h>
22 #include <net/net_namespace.h>
23 #include <net/ieee80211_radiotap.h>
24 #include <net/cfg80211.h>
25 #include <net/mac80211.h>
26 #include <net/codel.h>
27 #include <net/codel_impl.h>
28 #include <asm/unaligned.h>
29 #include <net/fq_impl.h>
31 #include "ieee80211_i.h"
32 #include "driver-ops.h"
42 static __le16 ieee80211_duration(struct ieee80211_tx_data *tx,
43 struct sk_buff *skb, int group_addr,
46 int rate, mrate, erp, dur, i, shift = 0;
47 struct ieee80211_rate *txrate;
48 struct ieee80211_local *local = tx->local;
49 struct ieee80211_supported_band *sband;
50 struct ieee80211_hdr *hdr;
51 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
52 struct ieee80211_chanctx_conf *chanctx_conf;
55 /* assume HW handles this */
56 if (tx->rate.flags & (IEEE80211_TX_RC_MCS | IEEE80211_TX_RC_VHT_MCS))
60 chanctx_conf = rcu_dereference(tx->sdata->vif.chanctx_conf);
62 shift = ieee80211_chandef_get_shift(&chanctx_conf->def);
63 rate_flags = ieee80211_chandef_rate_flags(&chanctx_conf->def);
68 if (WARN_ON_ONCE(tx->rate.idx < 0))
71 sband = local->hw.wiphy->bands[info->band];
72 txrate = &sband->bitrates[tx->rate.idx];
74 erp = txrate->flags & IEEE80211_RATE_ERP_G;
76 /* device is expected to do this */
77 if (sband->band == NL80211_BAND_S1GHZ)
81 * data and mgmt (except PS Poll):
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
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
97 hdr = (struct ieee80211_hdr *)skb->data;
98 if (ieee80211_is_ctl(hdr->frame_control)) {
99 /* TODO: These control frames are not currently sent by
100 * mac80211, but should they be implemented, this function
101 * needs to be updated to support duration field calculation.
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
111 * PS Poll: BIT(15) | BIT(14) | aid
117 if (0 /* FIX: data/mgmt during CFP */)
118 return cpu_to_le16(32768);
120 if (group_addr) /* Group address as the destination - no ACK */
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
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];
139 if (r->bitrate > txrate->bitrate)
142 if ((rate_flags & r->flags) != rate_flags)
145 if (tx->sdata->vif.bss_conf.basic_rates & BIT(i))
146 rate = DIV_ROUND_UP(r->bitrate, 1 << shift);
148 switch (sband->band) {
149 case NL80211_BAND_2GHZ:
150 case NL80211_BAND_LC: {
152 if (tx->sdata->flags & IEEE80211_SDATA_OPERATING_GMODE)
153 flag = IEEE80211_RATE_MANDATORY_G;
155 flag = IEEE80211_RATE_MANDATORY_B;
160 case NL80211_BAND_5GHZ:
161 case NL80211_BAND_6GHZ:
162 if (r->flags & IEEE80211_RATE_MANDATORY_A)
165 case NL80211_BAND_S1GHZ:
166 case NL80211_BAND_60GHZ:
167 /* TODO, for now fall through */
168 case NUM_NL80211_BANDS:
174 /* No matching basic rate found; use highest suitable mandatory
176 rate = DIV_ROUND_UP(mrate, 1 << shift);
179 /* Don't calculate ACKs for QoS Frames with NoAck Policy set */
180 if (ieee80211_is_data_qos(hdr->frame_control) &&
181 *(ieee80211_get_qos_ctl(hdr)) & IEEE80211_QOS_CTL_ACK_POLICY_NOACK)
184 /* Time needed to transmit ACK
185 * (10 bytes + 4-byte FCS = 112 bits) plus SIFS; rounded up
186 * to closest integer */
187 dur = ieee80211_frame_duration(sband->band, 10, rate, erp,
188 tx->sdata->vif.bss_conf.use_short_preamble,
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 */
196 dur += ieee80211_frame_duration(sband->band, next_frag_len,
197 txrate->bitrate, erp,
198 tx->sdata->vif.bss_conf.use_short_preamble,
202 return cpu_to_le16(dur);
206 static ieee80211_tx_result debug_noinline
207 ieee80211_tx_h_dynamic_ps(struct ieee80211_tx_data *tx)
209 struct ieee80211_local *local = tx->local;
210 struct ieee80211_if_managed *ifmgd;
211 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx->skb);
213 /* driver doesn't support power save */
214 if (!ieee80211_hw_check(&local->hw, SUPPORTS_PS))
217 /* hardware does dynamic power save */
218 if (ieee80211_hw_check(&local->hw, SUPPORTS_DYNAMIC_PS))
221 /* dynamic power save disabled */
222 if (local->hw.conf.dynamic_ps_timeout <= 0)
225 /* we are scanning, don't enable power save */
229 if (!local->ps_sdata)
232 /* No point if we're going to suspend */
233 if (local->quiescing)
236 /* dynamic ps is supported only in managed mode */
237 if (tx->sdata->vif.type != NL80211_IFTYPE_STATION)
240 if (unlikely(info->flags & IEEE80211_TX_INTFL_OFFCHAN_TX_OK))
243 ifmgd = &tx->sdata->u.mgd;
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
254 * Note: ifmgd->uapsd_queues access is racy here. If the value is
255 * changed via debugfs, user needs to reassociate manually to have
256 * everything in sync.
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)
263 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
264 ieee80211_stop_queues_by_reason(&local->hw,
265 IEEE80211_MAX_QUEUE_MAP,
266 IEEE80211_QUEUE_STOP_REASON_PS,
268 ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED;
269 ieee80211_queue_work(&local->hw,
270 &local->dynamic_ps_disable_work);
273 /* Don't restart the timer if we're not disassociated */
274 if (!ifmgd->associated)
277 mod_timer(&local->dynamic_ps_timer, jiffies +
278 msecs_to_jiffies(local->hw.conf.dynamic_ps_timeout));
283 static ieee80211_tx_result debug_noinline
284 ieee80211_tx_h_check_assoc(struct ieee80211_tx_data *tx)
287 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)tx->skb->data;
288 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx->skb);
291 if (unlikely(info->flags & IEEE80211_TX_CTL_INJECTED))
294 if (unlikely(test_bit(SCAN_SW_SCANNING, &tx->local->scanning)) &&
295 test_bit(SDATA_STATE_OFFCHANNEL, &tx->sdata->state) &&
296 !ieee80211_is_probe_req(hdr->frame_control) &&
297 !ieee80211_is_any_nullfunc(hdr->frame_control))
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.
307 * http://article.gmane.org/gmane.linux.kernel.wireless.general/30089
311 if (tx->sdata->vif.type == NL80211_IFTYPE_OCB)
314 if (tx->flags & IEEE80211_TX_PS_BUFFERED)
318 assoc = test_sta_flag(tx->sta, WLAN_STA_ASSOC);
320 if (likely(tx->flags & IEEE80211_TX_UNICAST)) {
321 if (unlikely(!assoc &&
322 ieee80211_is_data(hdr->frame_control))) {
323 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
324 sdata_info(tx->sdata,
325 "dropped data frame to not associated station %pM\n",
328 I802_DEBUG_INC(tx->local->tx_handlers_drop_not_assoc);
331 } else if (unlikely(ieee80211_is_data(hdr->frame_control) &&
332 ieee80211_vif_get_num_mcast_if(tx->sdata) == 0)) {
334 * No associated STAs - no need to send multicast
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)
349 int total = 0, purged = 0;
351 struct ieee80211_sub_if_data *sdata;
352 struct sta_info *sta;
354 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
357 if (sdata->vif.type == NL80211_IFTYPE_AP)
358 ps = &sdata->u.ap.ps;
359 else if (ieee80211_vif_is_mesh(&sdata->vif))
360 ps = &sdata->u.mesh.ps;
364 skb = skb_dequeue(&ps->bc_buf);
367 ieee80211_free_txskb(&local->hw, skb);
369 total += skb_queue_len(&ps->bc_buf);
373 * Drop one frame from each station from the lowest-priority
374 * AC that has frames at all.
376 list_for_each_entry_rcu(sta, &local->sta_list, list) {
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]);
384 ieee80211_free_txskb(&local->hw, skb);
390 local->total_ps_buffered = total;
391 ps_dbg_hw(&local->hw, "PS buffers full - purged %d frames\n", purged);
394 static ieee80211_tx_result
395 ieee80211_tx_h_multicast_ps_buf(struct ieee80211_tx_data *tx)
397 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx->skb);
398 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)tx->skb->data;
402 * broadcast/multicast frame
404 * If any of the associated/peer stations is in power save mode,
405 * the frame is buffered to be sent after DTIM beacon frame.
406 * This is done either by the hardware or us.
409 /* powersaving STAs currently only in AP/VLAN/mesh mode */
410 if (tx->sdata->vif.type == NL80211_IFTYPE_AP ||
411 tx->sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
415 ps = &tx->sdata->bss->ps;
416 } else if (ieee80211_vif_is_mesh(&tx->sdata->vif)) {
417 ps = &tx->sdata->u.mesh.ps;
423 /* no buffering for ordered frames */
424 if (ieee80211_has_order(hdr->frame_control))
427 if (ieee80211_is_probe_req(hdr->frame_control))
430 if (ieee80211_hw_check(&tx->local->hw, QUEUE_CONTROL))
431 info->hw_queue = tx->sdata->vif.cab_queue;
433 /* no stations in PS mode and no buffered packets */
434 if (!atomic_read(&ps->num_sta_ps) && skb_queue_empty(&ps->bc_buf))
437 info->flags |= IEEE80211_TX_CTL_SEND_AFTER_DTIM;
439 /* device releases frame after DTIM beacon */
440 if (!ieee80211_hw_check(&tx->local->hw, HOST_BROADCAST_PS_BUFFERING))
443 /* buffered in mac80211 */
444 if (tx->local->total_ps_buffered >= TOTAL_MAX_TX_BUFFER)
445 purge_old_ps_buffers(tx->local);
447 if (skb_queue_len(&ps->bc_buf) >= AP_MAX_BC_BUFFER) {
449 "BC TX buffer full - dropping the oldest frame\n");
450 ieee80211_free_txskb(&tx->local->hw, skb_dequeue(&ps->bc_buf));
452 tx->local->total_ps_buffered++;
454 skb_queue_tail(&ps->bc_buf, tx->skb);
459 static int ieee80211_use_mfp(__le16 fc, struct sta_info *sta,
462 if (!ieee80211_is_mgmt(fc))
465 if (sta == NULL || !test_sta_flag(sta, WLAN_STA_MFP))
468 if (!ieee80211_is_robust_mgmt_frame(skb))
474 static ieee80211_tx_result
475 ieee80211_tx_h_unicast_ps_buf(struct ieee80211_tx_data *tx)
477 struct sta_info *sta = tx->sta;
478 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx->skb);
479 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)tx->skb->data;
480 struct ieee80211_local *local = tx->local;
485 if (unlikely((test_sta_flag(sta, WLAN_STA_PS_STA) ||
486 test_sta_flag(sta, WLAN_STA_PS_DRIVER) ||
487 test_sta_flag(sta, WLAN_STA_PS_DELIVER)) &&
488 !(info->flags & IEEE80211_TX_CTL_NO_PS_BUFFER))) {
489 int ac = skb_get_queue_mapping(tx->skb);
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;
497 ps_dbg(sta->sdata, "STA %pM aid %d: PS buffer for AC %d\n",
498 sta->sta.addr, sta->sta.aid, ac);
499 if (tx->local->total_ps_buffered >= TOTAL_MAX_TX_BUFFER)
500 purge_old_ps_buffers(tx->local);
502 /* sync with ieee80211_sta_ps_deliver_wakeup */
503 spin_lock(&sta->ps_lock);
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.
509 if (!test_sta_flag(sta, WLAN_STA_PS_STA) &&
510 !test_sta_flag(sta, WLAN_STA_PS_DRIVER) &&
511 !test_sta_flag(sta, WLAN_STA_PS_DELIVER)) {
512 spin_unlock(&sta->ps_lock);
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]);
519 "STA %pM TX buffer for AC %d full - dropping oldest frame\n",
521 ieee80211_free_txskb(&local->hw, old);
523 tx->local->total_ps_buffered++;
525 info->control.jiffies = jiffies;
526 info->control.vif = &tx->sdata->vif;
527 info->control.flags |= IEEE80211_TX_INTCFL_NEED_TXPROCESSING;
528 info->flags &= ~IEEE80211_TX_TEMPORARY_FLAGS;
529 skb_queue_tail(&sta->ps_tx_buf[ac], tx->skb);
530 spin_unlock(&sta->ps_lock);
532 if (!timer_pending(&local->sta_cleanup))
533 mod_timer(&local->sta_cleanup,
534 round_jiffies(jiffies +
535 STA_INFO_CLEANUP_INTERVAL));
538 * We queued up some frames, so the TIM bit might
539 * need to be set, recalculate it.
541 sta_info_recalc_tim(sta);
544 } else if (unlikely(test_sta_flag(sta, WLAN_STA_PS_STA))) {
546 "STA %pM in PS mode, but polling/in SP -> send frame\n",
553 static ieee80211_tx_result debug_noinline
554 ieee80211_tx_h_ps_buf(struct ieee80211_tx_data *tx)
556 if (unlikely(tx->flags & IEEE80211_TX_PS_BUFFERED))
559 if (tx->flags & IEEE80211_TX_UNICAST)
560 return ieee80211_tx_h_unicast_ps_buf(tx);
562 return ieee80211_tx_h_multicast_ps_buf(tx);
565 static ieee80211_tx_result debug_noinline
566 ieee80211_tx_h_check_control_port_protocol(struct ieee80211_tx_data *tx)
568 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx->skb);
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;
574 info->flags |= IEEE80211_TX_CTL_USE_MINRATE;
580 static ieee80211_tx_result debug_noinline
581 ieee80211_tx_h_select_key(struct ieee80211_tx_data *tx)
583 struct ieee80211_key *key;
584 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx->skb);
585 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)tx->skb->data;
587 if (unlikely(info->flags & IEEE80211_TX_INTFL_DONT_ENCRYPT)) {
593 (key = rcu_dereference(tx->sta->ptk[tx->sta->ptk_idx])))
595 else if (ieee80211_is_group_privacy_action(tx->skb) &&
596 (key = rcu_dereference(tx->sdata->default_multicast_key)))
598 else if (ieee80211_is_mgmt(hdr->frame_control) &&
599 is_multicast_ether_addr(hdr->addr1) &&
600 ieee80211_is_robust_mgmt_frame(tx->skb) &&
601 (key = rcu_dereference(tx->sdata->default_mgmt_key)))
603 else if (is_multicast_ether_addr(hdr->addr1) &&
604 (key = rcu_dereference(tx->sdata->default_multicast_key)))
606 else if (!is_multicast_ether_addr(hdr->addr1) &&
607 (key = rcu_dereference(tx->sdata->default_unicast_key)))
613 bool skip_hw = false;
615 /* TODO: add threshold stuff again */
617 switch (tx->key->conf.cipher) {
618 case WLAN_CIPHER_SUITE_WEP40:
619 case WLAN_CIPHER_SUITE_WEP104:
620 case WLAN_CIPHER_SUITE_TKIP:
621 if (!ieee80211_is_data_present(hdr->frame_control))
624 case WLAN_CIPHER_SUITE_CCMP:
625 case WLAN_CIPHER_SUITE_CCMP_256:
626 case WLAN_CIPHER_SUITE_GCMP:
627 case WLAN_CIPHER_SUITE_GCMP_256:
628 if (!ieee80211_is_data_present(hdr->frame_control) &&
629 !ieee80211_use_mfp(hdr->frame_control, tx->sta,
631 !ieee80211_is_group_privacy_action(tx->skb))
634 skip_hw = (tx->key->conf.flags &
635 IEEE80211_KEY_FLAG_SW_MGMT_TX) &&
636 ieee80211_is_mgmt(hdr->frame_control);
638 case WLAN_CIPHER_SUITE_AES_CMAC:
639 case WLAN_CIPHER_SUITE_BIP_CMAC_256:
640 case WLAN_CIPHER_SUITE_BIP_GMAC_128:
641 case WLAN_CIPHER_SUITE_BIP_GMAC_256:
642 if (!ieee80211_is_mgmt(hdr->frame_control))
647 if (unlikely(tx->key && tx->key->flags & KEY_FLAG_TAINTED &&
648 !ieee80211_is_deauth(hdr->frame_control)))
651 if (!skip_hw && tx->key &&
652 tx->key->flags & KEY_FLAG_UPLOADED_TO_HARDWARE)
653 info->control.hw_key = &tx->key->conf;
654 } else if (ieee80211_is_data_present(hdr->frame_control) && tx->sta &&
655 test_sta_flag(tx->sta, WLAN_STA_USES_ENCRYPTION)) {
662 static ieee80211_tx_result debug_noinline
663 ieee80211_tx_h_rate_ctrl(struct ieee80211_tx_data *tx)
665 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx->skb);
666 struct ieee80211_hdr *hdr = (void *)tx->skb->data;
667 struct ieee80211_supported_band *sband;
669 struct ieee80211_tx_rate_control txrc;
670 struct ieee80211_sta_rates *ratetbl = NULL;
671 bool encap = info->flags & IEEE80211_TX_CTL_HW_80211_ENCAP;
674 memset(&txrc, 0, sizeof(txrc));
676 sband = tx->local->hw.wiphy->bands[info->band];
678 len = min_t(u32, tx->skb->len + FCS_LEN,
679 tx->local->hw.wiphy->frag_threshold);
681 /* set up the tx rate control struct we give the RC algo */
682 txrc.hw = &tx->local->hw;
684 txrc.bss_conf = &tx->sdata->vif.bss_conf;
686 txrc.reported_rate.idx = -1;
687 txrc.rate_idx_mask = tx->sdata->rc_rateidx_mask[info->band];
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];
693 txrc.bss = (tx->sdata->vif.type == NL80211_IFTYPE_AP ||
694 tx->sdata->vif.type == NL80211_IFTYPE_MESH_POINT ||
695 tx->sdata->vif.type == NL80211_IFTYPE_ADHOC ||
696 tx->sdata->vif.type == NL80211_IFTYPE_OCB);
698 /* set up RTS protection if desired */
699 if (len > tx->local->hw.wiphy->rts_threshold) {
703 info->control.use_rts = txrc.rts;
704 info->control.use_cts_prot = tx->sdata->vif.bss_conf.use_cts_prot;
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.
712 if (tx->sdata->vif.bss_conf.use_short_preamble &&
713 (ieee80211_is_tx_data(tx->skb) ||
714 (tx->sta && test_sta_flag(tx->sta, WLAN_STA_SHORT_PREAMBLE))))
715 txrc.short_preamble = true;
717 info->control.short_preamble = txrc.short_preamble;
719 /* don't ask rate control when rate already injected via radiotap */
720 if (info->control.flags & IEEE80211_TX_CTRL_RATE_INJECT)
724 assoc = test_sta_flag(tx->sta, WLAN_STA_ASSOC);
727 * Lets not bother rate control if we're associated and cannot
728 * talk to the sta. This should not happen.
730 if (WARN(test_bit(SCAN_SW_SCANNING, &tx->local->scanning) && assoc &&
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",
736 encap ? ((struct ethhdr *)hdr)->h_dest : hdr->addr1,
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.
744 rate_control_get_rate(tx->sdata, tx->sta, &txrc);
746 if (tx->sta && !info->control.skip_table)
747 ratetbl = rcu_dereference(tx->sta->sta.rates);
749 if (unlikely(info->control.rates[0].idx < 0)) {
751 struct ieee80211_tx_rate rate = {
752 .idx = ratetbl->rate[0].idx,
753 .flags = ratetbl->rate[0].flags,
754 .count = ratetbl->rate[0].count
757 if (ratetbl->rate[0].idx < 0)
765 tx->rate = info->control.rates[0];
768 if (txrc.reported_rate.idx < 0) {
769 txrc.reported_rate = tx->rate;
770 if (tx->sta && ieee80211_is_tx_data(tx->skb))
771 tx->sta->deflink.tx_stats.last_rate = txrc.reported_rate;
773 tx->sta->deflink.tx_stats.last_rate = txrc.reported_rate;
778 if (unlikely(!info->control.rates[0].count))
779 info->control.rates[0].count = 1;
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;
788 static __le16 ieee80211_tx_next_seq(struct sta_info *sta, int tid)
790 u16 *seq = &sta->tid_seq[tid];
791 __le16 ret = cpu_to_le16(*seq);
793 /* Increase the sequence number. */
794 *seq = (*seq + 0x10) & IEEE80211_SCTL_SEQ;
799 static ieee80211_tx_result debug_noinline
800 ieee80211_tx_h_sequence(struct ieee80211_tx_data *tx)
802 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx->skb);
803 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)tx->skb->data;
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.
811 if (unlikely(info->control.vif->type == NL80211_IFTYPE_MONITOR))
814 if (unlikely(ieee80211_is_ctl(hdr->frame_control)))
817 if (ieee80211_hdrlen(hdr->frame_control) < 24)
820 if (ieee80211_is_qos_nullfunc(hdr->frame_control))
823 if (info->control.flags & IEEE80211_TX_CTRL_NO_SEQNO)
827 * Anything but QoS data that has a sequence number field
828 * (is long enough) gets a sequence number from the global
829 * counter. QoS data frames with a multicast destination
830 * also use the global counter (802.11-2012 9.3.2.10).
832 if (!ieee80211_is_data_qos(hdr->frame_control) ||
833 is_multicast_ether_addr(hdr->addr1)) {
834 /* driver should assign sequence number */
835 info->flags |= IEEE80211_TX_CTL_ASSIGN_SEQ;
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;
840 tx->sta->deflink.tx_stats.msdu[IEEE80211_NUM_TIDS]++;
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.
852 /* include per-STA, per-TID sequence counter */
853 tid = ieee80211_get_tid(hdr);
854 tx->sta->deflink.tx_stats.msdu[tid]++;
856 hdr->seq_ctrl = ieee80211_tx_next_seq(tx->sta, tid);
861 static int ieee80211_fragment(struct ieee80211_tx_data *tx,
862 struct sk_buff *skb, int hdrlen,
865 struct ieee80211_local *local = tx->local;
866 struct ieee80211_tx_info *info;
868 int per_fragm = frag_threshold - hdrlen - FCS_LEN;
869 int pos = hdrlen + per_fragm;
870 int rem = skb->len - hdrlen - per_fragm;
872 if (WARN_ON(rem < 0))
875 /* first fragment was already added to queue by caller */
878 int fraglen = per_fragm;
883 tmp = dev_alloc_skb(local->tx_headroom +
885 IEEE80211_ENCRYPT_HEADROOM +
886 IEEE80211_ENCRYPT_TAILROOM);
890 __skb_queue_tail(&tx->skbs, tmp);
893 local->tx_headroom + IEEE80211_ENCRYPT_HEADROOM);
895 /* copy control information */
896 memcpy(tmp->cb, skb->cb, sizeof(tmp->cb));
898 info = IEEE80211_SKB_CB(tmp);
899 info->flags &= ~(IEEE80211_TX_CTL_CLEAR_PS_FILT |
900 IEEE80211_TX_CTL_FIRST_FRAGMENT);
903 info->flags |= IEEE80211_TX_CTL_MORE_FRAMES;
905 skb_copy_queue_mapping(tmp, skb);
906 tmp->priority = skb->priority;
909 /* copy header and data */
910 skb_put_data(tmp, skb->data, hdrlen);
911 skb_put_data(tmp, skb->data + pos, fraglen);
916 /* adjust first fragment's length */
917 skb_trim(skb, hdrlen + per_fragm);
921 static ieee80211_tx_result debug_noinline
922 ieee80211_tx_h_fragment(struct ieee80211_tx_data *tx)
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;
927 int frag_threshold = tx->local->hw.wiphy->frag_threshold;
931 /* no matter what happens, tx->skb moves to tx->skbs */
932 __skb_queue_tail(&tx->skbs, skb);
935 if (info->flags & IEEE80211_TX_CTL_DONTFRAG)
938 if (ieee80211_hw_check(&tx->local->hw, SUPPORTS_TX_FRAG))
942 * Warn when submitting a fragmented A-MPDU frame and drop it.
943 * This scenario is handled in ieee80211_tx_prepare but extra
944 * caution taken here as fragmented ampdu may cause Tx stop.
946 if (WARN_ON(info->flags & IEEE80211_TX_CTL_AMPDU))
949 hdrlen = ieee80211_hdrlen(hdr->frame_control);
951 /* internal error, why isn't DONTFRAG set? */
952 if (WARN_ON(skb->len + FCS_LEN <= frag_threshold))
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.
963 if (ieee80211_fragment(tx, skb, hdrlen, frag_threshold))
966 /* update duration/seq/flags of fragments */
969 skb_queue_walk(&tx->skbs, skb) {
970 const __le16 morefrags = cpu_to_le16(IEEE80211_FCTL_MOREFRAGS);
972 hdr = (void *)skb->data;
973 info = IEEE80211_SKB_CB(skb);
975 if (!skb_queue_is_last(&tx->skbs, skb)) {
976 hdr->frame_control |= morefrags;
978 * No multi-rate retries for fragmented frames, that
979 * would completely throw off the NAV at other STAs.
981 info->control.rates[1].idx = -1;
982 info->control.rates[2].idx = -1;
983 info->control.rates[3].idx = -1;
984 BUILD_BUG_ON(IEEE80211_TX_MAX_RATES != 4);
985 info->flags &= ~IEEE80211_TX_CTL_RATE_CTRL_PROBE;
987 hdr->frame_control &= ~morefrags;
989 hdr->seq_ctrl |= cpu_to_le16(fragnum & IEEE80211_SCTL_FRAG);
996 static ieee80211_tx_result debug_noinline
997 ieee80211_tx_h_stats(struct ieee80211_tx_data *tx)
1005 skb_queue_walk(&tx->skbs, skb) {
1006 ac = skb_get_queue_mapping(skb);
1007 tx->sta->deflink.tx_stats.bytes[ac] += skb->len;
1010 tx->sta->deflink.tx_stats.packets[ac]++;
1015 static ieee80211_tx_result debug_noinline
1016 ieee80211_tx_h_encrypt(struct ieee80211_tx_data *tx)
1021 switch (tx->key->conf.cipher) {
1022 case WLAN_CIPHER_SUITE_WEP40:
1023 case WLAN_CIPHER_SUITE_WEP104:
1024 return ieee80211_crypto_wep_encrypt(tx);
1025 case WLAN_CIPHER_SUITE_TKIP:
1026 return ieee80211_crypto_tkip_encrypt(tx);
1027 case WLAN_CIPHER_SUITE_CCMP:
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);
1033 case WLAN_CIPHER_SUITE_AES_CMAC:
1034 return ieee80211_crypto_aes_cmac_encrypt(tx);
1035 case WLAN_CIPHER_SUITE_BIP_CMAC_256:
1036 return ieee80211_crypto_aes_cmac_256_encrypt(tx);
1037 case WLAN_CIPHER_SUITE_BIP_GMAC_128:
1038 case WLAN_CIPHER_SUITE_BIP_GMAC_256:
1039 return ieee80211_crypto_aes_gmac_encrypt(tx);
1040 case WLAN_CIPHER_SUITE_GCMP:
1041 case WLAN_CIPHER_SUITE_GCMP_256:
1042 return ieee80211_crypto_gcmp_encrypt(tx);
1048 static ieee80211_tx_result debug_noinline
1049 ieee80211_tx_h_calculate_duration(struct ieee80211_tx_data *tx)
1051 struct sk_buff *skb;
1052 struct ieee80211_hdr *hdr;
1056 skb_queue_walk(&tx->skbs, skb) {
1057 hdr = (void *) skb->data;
1058 if (unlikely(ieee80211_is_pspoll(hdr->frame_control)))
1059 break; /* must not overwrite AID */
1060 if (!skb_queue_is_last(&tx->skbs, skb)) {
1061 struct sk_buff *next = skb_queue_next(&tx->skbs, skb);
1062 next_len = next->len;
1065 group_addr = is_multicast_ether_addr(hdr->addr1);
1068 ieee80211_duration(tx, skb, group_addr, next_len);
1074 /* actual transmit path */
1076 static bool ieee80211_tx_prep_agg(struct ieee80211_tx_data *tx,
1077 struct sk_buff *skb,
1078 struct ieee80211_tx_info *info,
1079 struct tid_ampdu_tx *tid_tx,
1082 bool queued = false;
1083 bool reset_agg_timer = false;
1084 struct sk_buff *purge_skb = NULL;
1086 if (test_bit(HT_AGG_STATE_OPERATIONAL, &tid_tx->state)) {
1087 info->flags |= IEEE80211_TX_CTL_AMPDU;
1088 reset_agg_timer = true;
1089 } else if (test_bit(HT_AGG_STATE_WANT_START, &tid_tx->state)) {
1091 * nothing -- this aggregation session is being started
1092 * but that might still fail with the driver
1094 } else if (!tx->sta->sta.txq[tid]) {
1095 spin_lock(&tx->sta->lock);
1097 * Need to re-check now, because we may get here
1099 * 1) in the window during which the setup is actually
1100 * already done, but not marked yet because not all
1101 * packets are spliced over to the driver pending
1102 * queue yet -- if this happened we acquire the lock
1103 * either before or after the splice happens, but
1104 * need to recheck which of these cases happened.
1106 * 2) during session teardown, if the OPERATIONAL bit
1107 * was cleared due to the teardown but the pointer
1108 * hasn't been assigned NULL yet (or we loaded it
1109 * before it was assigned) -- in this case it may
1110 * now be NULL which means we should just let the
1111 * packet pass through because splicing the frames
1112 * back is already done.
1114 tid_tx = rcu_dereference_protected_tid_tx(tx->sta, tid);
1117 /* do nothing, let packet pass through */
1118 } else if (test_bit(HT_AGG_STATE_OPERATIONAL, &tid_tx->state)) {
1119 info->flags |= IEEE80211_TX_CTL_AMPDU;
1120 reset_agg_timer = true;
1123 if (info->flags & IEEE80211_TX_CTL_NO_PS_BUFFER) {
1124 clear_sta_flag(tx->sta, WLAN_STA_SP);
1125 ps_dbg(tx->sta->sdata,
1126 "STA %pM aid %d: SP frame queued, close the SP w/o telling the peer\n",
1127 tx->sta->sta.addr, tx->sta->sta.aid);
1129 info->control.vif = &tx->sdata->vif;
1130 info->control.flags |= IEEE80211_TX_INTCFL_NEED_TXPROCESSING;
1131 info->flags &= ~IEEE80211_TX_TEMPORARY_FLAGS;
1132 __skb_queue_tail(&tid_tx->pending, skb);
1133 if (skb_queue_len(&tid_tx->pending) > STA_MAX_TX_BUFFER)
1134 purge_skb = __skb_dequeue(&tid_tx->pending);
1136 spin_unlock(&tx->sta->lock);
1139 ieee80211_free_txskb(&tx->local->hw, purge_skb);
1142 /* reset session timer */
1143 if (reset_agg_timer)
1144 tid_tx->last_tx = jiffies;
1150 ieee80211_aggr_check(struct ieee80211_sub_if_data *sdata,
1151 struct sta_info *sta,
1152 struct sk_buff *skb)
1154 struct rate_control_ref *ref = sdata->local->rate_ctrl;
1157 if (!ref || !(ref->ops->capa & RATE_CTRL_CAPA_AMPDU_TRIGGER))
1160 if (!sta || !sta->sta.deflink.ht_cap.ht_supported ||
1161 !sta->sta.wme || skb_get_queue_mapping(skb) == IEEE80211_AC_VO ||
1162 skb->protocol == sdata->control_port_protocol)
1165 tid = skb->priority & IEEE80211_QOS_CTL_TID_MASK;
1166 if (likely(sta->ampdu_mlme.tid_tx[tid]))
1169 ieee80211_start_tx_ba_session(&sta->sta, tid, 0);
1174 * pass %NULL for the station if unknown, a valid pointer if known
1175 * or an ERR_PTR() if the station is known not to exist
1177 static ieee80211_tx_result
1178 ieee80211_tx_prepare(struct ieee80211_sub_if_data *sdata,
1179 struct ieee80211_tx_data *tx,
1180 struct sta_info *sta, struct sk_buff *skb)
1182 struct ieee80211_local *local = sdata->local;
1183 struct ieee80211_hdr *hdr;
1184 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
1185 bool aggr_check = false;
1188 memset(tx, 0, sizeof(*tx));
1192 __skb_queue_head_init(&tx->skbs);
1195 * If this flag is set to true anywhere, and we get here,
1196 * we are doing the needed processing, so remove the flag
1199 info->control.flags &= ~IEEE80211_TX_INTCFL_NEED_TXPROCESSING;
1201 hdr = (struct ieee80211_hdr *) skb->data;
1207 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
1208 tx->sta = rcu_dereference(sdata->u.vlan.sta);
1209 if (!tx->sta && sdata->wdev.use_4addr)
1211 } else if (tx->sdata->control_port_protocol == tx->skb->protocol) {
1212 tx->sta = sta_info_get_bss(sdata, hdr->addr1);
1214 if (!tx->sta && !is_multicast_ether_addr(hdr->addr1)) {
1215 tx->sta = sta_info_get(sdata, hdr->addr1);
1220 if (tx->sta && ieee80211_is_data_qos(hdr->frame_control) &&
1221 !ieee80211_is_qos_nullfunc(hdr->frame_control) &&
1222 ieee80211_hw_check(&local->hw, AMPDU_AGGREGATION) &&
1223 !ieee80211_hw_check(&local->hw, TX_AMPDU_SETUP_IN_HW)) {
1224 struct tid_ampdu_tx *tid_tx;
1226 tid = ieee80211_get_tid(hdr);
1227 tid_tx = rcu_dereference(tx->sta->ampdu_mlme.tid_tx[tid]);
1228 if (!tid_tx && aggr_check) {
1229 ieee80211_aggr_check(sdata, tx->sta, skb);
1230 tid_tx = rcu_dereference(tx->sta->ampdu_mlme.tid_tx[tid]);
1236 queued = ieee80211_tx_prep_agg(tx, skb, info,
1239 if (unlikely(queued))
1244 if (is_multicast_ether_addr(hdr->addr1)) {
1245 tx->flags &= ~IEEE80211_TX_UNICAST;
1246 info->flags |= IEEE80211_TX_CTL_NO_ACK;
1248 tx->flags |= IEEE80211_TX_UNICAST;
1250 if (!(info->flags & IEEE80211_TX_CTL_DONTFRAG)) {
1251 if (!(tx->flags & IEEE80211_TX_UNICAST) ||
1252 skb->len + FCS_LEN <= local->hw.wiphy->frag_threshold ||
1253 info->flags & IEEE80211_TX_CTL_AMPDU)
1254 info->flags |= IEEE80211_TX_CTL_DONTFRAG;
1258 info->flags |= IEEE80211_TX_CTL_CLEAR_PS_FILT;
1259 else if (test_and_clear_sta_flag(tx->sta, WLAN_STA_CLEAR_PS_FILT)) {
1260 info->flags |= IEEE80211_TX_CTL_CLEAR_PS_FILT;
1261 ieee80211_check_fast_xmit(tx->sta);
1264 info->flags |= IEEE80211_TX_CTL_FIRST_FRAGMENT;
1269 static struct txq_info *ieee80211_get_txq(struct ieee80211_local *local,
1270 struct ieee80211_vif *vif,
1271 struct sta_info *sta,
1272 struct sk_buff *skb)
1274 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
1275 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
1276 struct ieee80211_txq *txq = NULL;
1278 if ((info->flags & IEEE80211_TX_CTL_SEND_AFTER_DTIM) ||
1279 (info->control.flags & IEEE80211_TX_CTRL_PS_RESPONSE))
1282 if (!(info->flags & IEEE80211_TX_CTL_HW_80211_ENCAP) &&
1283 unlikely(!ieee80211_is_data_present(hdr->frame_control))) {
1284 if ((!ieee80211_is_mgmt(hdr->frame_control) ||
1285 ieee80211_is_bufferable_mmpdu(hdr->frame_control) ||
1286 vif->type == NL80211_IFTYPE_STATION) &&
1287 sta && sta->uploaded) {
1289 * This will be NULL if the driver didn't set the
1290 * opt-in hardware flag.
1292 txq = sta->sta.txq[IEEE80211_NUM_TIDS];
1295 u8 tid = skb->priority & IEEE80211_QOS_CTL_TID_MASK;
1300 txq = sta->sta.txq[tid];
1308 return to_txq_info(txq);
1311 static void ieee80211_set_skb_enqueue_time(struct sk_buff *skb)
1313 IEEE80211_SKB_CB(skb)->control.enqueue_time = codel_get_time();
1316 static u32 codel_skb_len_func(const struct sk_buff *skb)
1321 static codel_time_t codel_skb_time_func(const struct sk_buff *skb)
1323 const struct ieee80211_tx_info *info;
1325 info = (const struct ieee80211_tx_info *)skb->cb;
1326 return info->control.enqueue_time;
1329 static struct sk_buff *codel_dequeue_func(struct codel_vars *cvars,
1332 struct ieee80211_local *local;
1333 struct txq_info *txqi;
1335 struct fq_flow *flow;
1338 local = vif_to_sdata(txqi->txq.vif)->local;
1341 if (cvars == &txqi->def_cvars)
1342 flow = &txqi->tin.default_flow;
1344 flow = &fq->flows[cvars - local->cvars];
1346 return fq_flow_dequeue(fq, flow);
1349 static void codel_drop_func(struct sk_buff *skb,
1352 struct ieee80211_local *local;
1353 struct ieee80211_hw *hw;
1354 struct txq_info *txqi;
1357 local = vif_to_sdata(txqi->txq.vif)->local;
1360 ieee80211_free_txskb(hw, skb);
1363 static struct sk_buff *fq_tin_dequeue_func(struct fq *fq,
1365 struct fq_flow *flow)
1367 struct ieee80211_local *local;
1368 struct txq_info *txqi;
1369 struct codel_vars *cvars;
1370 struct codel_params *cparams;
1371 struct codel_stats *cstats;
1373 local = container_of(fq, struct ieee80211_local, fq);
1374 txqi = container_of(tin, struct txq_info, tin);
1375 cstats = &txqi->cstats;
1377 if (txqi->txq.sta) {
1378 struct sta_info *sta = container_of(txqi->txq.sta,
1379 struct sta_info, sta);
1380 cparams = &sta->cparams;
1382 cparams = &local->cparams;
1385 if (flow == &tin->default_flow)
1386 cvars = &txqi->def_cvars;
1388 cvars = &local->cvars[flow - fq->flows];
1390 return codel_dequeue(txqi,
1396 codel_skb_time_func,
1398 codel_dequeue_func);
1401 static void fq_skb_free_func(struct fq *fq,
1403 struct fq_flow *flow,
1404 struct sk_buff *skb)
1406 struct ieee80211_local *local;
1408 local = container_of(fq, struct ieee80211_local, fq);
1409 ieee80211_free_txskb(&local->hw, skb);
1412 static void ieee80211_txq_enqueue(struct ieee80211_local *local,
1413 struct txq_info *txqi,
1414 struct sk_buff *skb)
1416 struct fq *fq = &local->fq;
1417 struct fq_tin *tin = &txqi->tin;
1418 u32 flow_idx = fq_flow_idx(fq, skb);
1420 ieee80211_set_skb_enqueue_time(skb);
1422 spin_lock_bh(&fq->lock);
1424 * For management frames, don't really apply codel etc.,
1425 * we don't want to apply any shaping or anything we just
1426 * want to simplify the driver API by having them on the
1429 if (unlikely(txqi->txq.tid == IEEE80211_NUM_TIDS)) {
1430 IEEE80211_SKB_CB(skb)->control.flags |=
1431 IEEE80211_TX_INTCFL_NEED_TXPROCESSING;
1432 __skb_queue_tail(&txqi->frags, skb);
1434 fq_tin_enqueue(fq, tin, flow_idx, skb,
1437 spin_unlock_bh(&fq->lock);
1440 static bool fq_vlan_filter_func(struct fq *fq, struct fq_tin *tin,
1441 struct fq_flow *flow, struct sk_buff *skb,
1444 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
1446 return info->control.vif == data;
1449 void ieee80211_txq_remove_vlan(struct ieee80211_local *local,
1450 struct ieee80211_sub_if_data *sdata)
1452 struct fq *fq = &local->fq;
1453 struct txq_info *txqi;
1455 struct ieee80211_sub_if_data *ap;
1457 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_AP_VLAN))
1460 ap = container_of(sdata->bss, struct ieee80211_sub_if_data, u.ap);
1465 txqi = to_txq_info(ap->vif.txq);
1468 spin_lock_bh(&fq->lock);
1469 fq_tin_filter(fq, tin, fq_vlan_filter_func, &sdata->vif,
1471 spin_unlock_bh(&fq->lock);
1474 void ieee80211_txq_init(struct ieee80211_sub_if_data *sdata,
1475 struct sta_info *sta,
1476 struct txq_info *txqi, int tid)
1478 fq_tin_init(&txqi->tin);
1479 codel_vars_init(&txqi->def_cvars);
1480 codel_stats_init(&txqi->cstats);
1481 __skb_queue_head_init(&txqi->frags);
1482 RB_CLEAR_NODE(&txqi->schedule_order);
1484 txqi->txq.vif = &sdata->vif;
1487 sdata->vif.txq = &txqi->txq;
1489 txqi->txq.ac = IEEE80211_AC_BE;
1494 if (tid == IEEE80211_NUM_TIDS) {
1495 if (sdata->vif.type == NL80211_IFTYPE_STATION) {
1496 /* Drivers need to opt in to the management MPDU TXQ */
1497 if (!ieee80211_hw_check(&sdata->local->hw,
1500 } else if (!ieee80211_hw_check(&sdata->local->hw,
1502 /* Drivers need to opt in to the bufferable MMPDU TXQ */
1505 txqi->txq.ac = IEEE80211_AC_VO;
1507 txqi->txq.ac = ieee80211_ac_from_tid(tid);
1510 txqi->txq.sta = &sta->sta;
1511 txqi->txq.tid = tid;
1512 sta->sta.txq[tid] = &txqi->txq;
1515 void ieee80211_txq_purge(struct ieee80211_local *local,
1516 struct txq_info *txqi)
1518 struct fq *fq = &local->fq;
1519 struct fq_tin *tin = &txqi->tin;
1521 spin_lock_bh(&fq->lock);
1522 fq_tin_reset(fq, tin, fq_skb_free_func);
1523 ieee80211_purge_tx_queue(&local->hw, &txqi->frags);
1524 spin_unlock_bh(&fq->lock);
1526 ieee80211_unschedule_txq(&local->hw, &txqi->txq, true);
1529 void ieee80211_txq_set_params(struct ieee80211_local *local)
1531 if (local->hw.wiphy->txq_limit)
1532 local->fq.limit = local->hw.wiphy->txq_limit;
1534 local->hw.wiphy->txq_limit = local->fq.limit;
1536 if (local->hw.wiphy->txq_memory_limit)
1537 local->fq.memory_limit = local->hw.wiphy->txq_memory_limit;
1539 local->hw.wiphy->txq_memory_limit = local->fq.memory_limit;
1541 if (local->hw.wiphy->txq_quantum)
1542 local->fq.quantum = local->hw.wiphy->txq_quantum;
1544 local->hw.wiphy->txq_quantum = local->fq.quantum;
1547 int ieee80211_txq_setup_flows(struct ieee80211_local *local)
1549 struct fq *fq = &local->fq;
1552 bool supp_vht = false;
1553 enum nl80211_band band;
1555 if (!local->ops->wake_tx_queue)
1558 ret = fq_init(fq, 4096);
1563 * If the hardware doesn't support VHT, it is safe to limit the maximum
1564 * queue size. 4 Mbytes is 64 max-size aggregates in 802.11n.
1566 for (band = 0; band < NUM_NL80211_BANDS; band++) {
1567 struct ieee80211_supported_band *sband;
1569 sband = local->hw.wiphy->bands[band];
1573 supp_vht = supp_vht || sband->vht_cap.vht_supported;
1577 fq->memory_limit = 4 << 20; /* 4 Mbytes */
1579 codel_params_init(&local->cparams);
1580 local->cparams.interval = MS2TIME(100);
1581 local->cparams.target = MS2TIME(20);
1582 local->cparams.ecn = true;
1584 local->cvars = kcalloc(fq->flows_cnt, sizeof(local->cvars[0]),
1586 if (!local->cvars) {
1587 spin_lock_bh(&fq->lock);
1588 fq_reset(fq, fq_skb_free_func);
1589 spin_unlock_bh(&fq->lock);
1593 for (i = 0; i < fq->flows_cnt; i++)
1594 codel_vars_init(&local->cvars[i]);
1596 ieee80211_txq_set_params(local);
1601 void ieee80211_txq_teardown_flows(struct ieee80211_local *local)
1603 struct fq *fq = &local->fq;
1605 if (!local->ops->wake_tx_queue)
1608 kfree(local->cvars);
1609 local->cvars = NULL;
1611 spin_lock_bh(&fq->lock);
1612 fq_reset(fq, fq_skb_free_func);
1613 spin_unlock_bh(&fq->lock);
1616 static bool ieee80211_queue_skb(struct ieee80211_local *local,
1617 struct ieee80211_sub_if_data *sdata,
1618 struct sta_info *sta,
1619 struct sk_buff *skb)
1621 struct ieee80211_vif *vif;
1622 struct txq_info *txqi;
1624 if (!local->ops->wake_tx_queue ||
1625 sdata->vif.type == NL80211_IFTYPE_MONITOR)
1628 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
1629 sdata = container_of(sdata->bss,
1630 struct ieee80211_sub_if_data, u.ap);
1633 txqi = ieee80211_get_txq(local, vif, sta, skb);
1638 ieee80211_txq_enqueue(local, txqi, skb);
1640 schedule_and_wake_txq(local, txqi);
1645 static bool ieee80211_tx_frags(struct ieee80211_local *local,
1646 struct ieee80211_vif *vif,
1647 struct sta_info *sta,
1648 struct sk_buff_head *skbs,
1651 struct ieee80211_tx_control control = {};
1652 struct sk_buff *skb, *tmp;
1653 unsigned long flags;
1655 skb_queue_walk_safe(skbs, skb, tmp) {
1656 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
1657 int q = info->hw_queue;
1659 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
1660 if (WARN_ON_ONCE(q >= local->hw.queues)) {
1661 __skb_unlink(skb, skbs);
1662 ieee80211_free_txskb(&local->hw, skb);
1667 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
1668 if (local->queue_stop_reasons[q] ||
1669 (!txpending && !skb_queue_empty(&local->pending[q]))) {
1670 if (unlikely(info->flags &
1671 IEEE80211_TX_INTFL_OFFCHAN_TX_OK)) {
1672 if (local->queue_stop_reasons[q] &
1673 ~BIT(IEEE80211_QUEUE_STOP_REASON_OFFCHANNEL)) {
1675 * Drop off-channel frames if queues
1676 * are stopped for any reason other
1677 * than off-channel operation. Never
1680 spin_unlock_irqrestore(
1681 &local->queue_stop_reason_lock,
1683 ieee80211_purge_tx_queue(&local->hw,
1690 * Since queue is stopped, queue up frames for
1691 * later transmission from the tx-pending
1692 * tasklet when the queue is woken again.
1695 skb_queue_splice_init(skbs,
1696 &local->pending[q]);
1698 skb_queue_splice_tail_init(skbs,
1699 &local->pending[q]);
1701 spin_unlock_irqrestore(&local->queue_stop_reason_lock,
1706 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
1708 info->control.vif = vif;
1709 control.sta = sta ? &sta->sta : NULL;
1711 __skb_unlink(skb, skbs);
1712 drv_tx(local, &control, skb);
1719 * Returns false if the frame couldn't be transmitted but was queued instead.
1721 static bool __ieee80211_tx(struct ieee80211_local *local,
1722 struct sk_buff_head *skbs, struct sta_info *sta,
1725 struct ieee80211_tx_info *info;
1726 struct ieee80211_sub_if_data *sdata;
1727 struct ieee80211_vif *vif;
1728 struct sk_buff *skb;
1731 if (WARN_ON(skb_queue_empty(skbs)))
1734 skb = skb_peek(skbs);
1735 info = IEEE80211_SKB_CB(skb);
1736 sdata = vif_to_sdata(info->control.vif);
1737 if (sta && !sta->uploaded)
1740 switch (sdata->vif.type) {
1741 case NL80211_IFTYPE_MONITOR:
1742 if (sdata->u.mntr.flags & MONITOR_FLAG_ACTIVE) {
1746 sdata = rcu_dereference(local->monitor_sdata);
1750 vif->hw_queue[skb_get_queue_mapping(skb)];
1751 } else if (ieee80211_hw_check(&local->hw, QUEUE_CONTROL)) {
1752 ieee80211_purge_tx_queue(&local->hw, skbs);
1757 case NL80211_IFTYPE_AP_VLAN:
1758 sdata = container_of(sdata->bss,
1759 struct ieee80211_sub_if_data, u.ap);
1766 result = ieee80211_tx_frags(local, vif, sta, skbs, txpending);
1768 WARN_ON_ONCE(!skb_queue_empty(skbs));
1774 * Invoke TX handlers, return 0 on success and non-zero if the
1775 * frame was dropped or queued.
1777 * The handlers are split into an early and late part. The latter is everything
1778 * that can be sensitive to reordering, and will be deferred to after packets
1779 * are dequeued from the intermediate queues (when they are enabled).
1781 static int invoke_tx_handlers_early(struct ieee80211_tx_data *tx)
1783 ieee80211_tx_result res = TX_DROP;
1785 #define CALL_TXH(txh) \
1788 if (res != TX_CONTINUE) \
1792 CALL_TXH(ieee80211_tx_h_dynamic_ps);
1793 CALL_TXH(ieee80211_tx_h_check_assoc);
1794 CALL_TXH(ieee80211_tx_h_ps_buf);
1795 CALL_TXH(ieee80211_tx_h_check_control_port_protocol);
1796 CALL_TXH(ieee80211_tx_h_select_key);
1799 if (unlikely(res == TX_DROP)) {
1800 I802_DEBUG_INC(tx->local->tx_handlers_drop);
1802 ieee80211_free_txskb(&tx->local->hw, tx->skb);
1804 ieee80211_purge_tx_queue(&tx->local->hw, &tx->skbs);
1806 } else if (unlikely(res == TX_QUEUED)) {
1807 I802_DEBUG_INC(tx->local->tx_handlers_queued);
1815 * Late handlers can be called while the sta lock is held. Handlers that can
1816 * cause packets to be generated will cause deadlock!
1818 static int invoke_tx_handlers_late(struct ieee80211_tx_data *tx)
1820 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx->skb);
1821 ieee80211_tx_result res = TX_CONTINUE;
1823 if (!ieee80211_hw_check(&tx->local->hw, HAS_RATE_CONTROL))
1824 CALL_TXH(ieee80211_tx_h_rate_ctrl);
1826 if (unlikely(info->flags & IEEE80211_TX_INTFL_RETRANSMISSION)) {
1827 __skb_queue_tail(&tx->skbs, tx->skb);
1832 CALL_TXH(ieee80211_tx_h_michael_mic_add);
1833 CALL_TXH(ieee80211_tx_h_sequence);
1834 CALL_TXH(ieee80211_tx_h_fragment);
1835 /* handlers after fragment must be aware of tx info fragmentation! */
1836 CALL_TXH(ieee80211_tx_h_stats);
1837 CALL_TXH(ieee80211_tx_h_encrypt);
1838 if (!ieee80211_hw_check(&tx->local->hw, HAS_RATE_CONTROL))
1839 CALL_TXH(ieee80211_tx_h_calculate_duration);
1843 if (unlikely(res == TX_DROP)) {
1844 I802_DEBUG_INC(tx->local->tx_handlers_drop);
1846 ieee80211_free_txskb(&tx->local->hw, tx->skb);
1848 ieee80211_purge_tx_queue(&tx->local->hw, &tx->skbs);
1850 } else if (unlikely(res == TX_QUEUED)) {
1851 I802_DEBUG_INC(tx->local->tx_handlers_queued);
1858 static int invoke_tx_handlers(struct ieee80211_tx_data *tx)
1860 int r = invoke_tx_handlers_early(tx);
1864 return invoke_tx_handlers_late(tx);
1867 bool ieee80211_tx_prepare_skb(struct ieee80211_hw *hw,
1868 struct ieee80211_vif *vif, struct sk_buff *skb,
1869 int band, struct ieee80211_sta **sta)
1871 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1872 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
1873 struct ieee80211_tx_data tx;
1874 struct sk_buff *skb2;
1876 if (ieee80211_tx_prepare(sdata, &tx, NULL, skb) == TX_DROP)
1880 info->control.vif = vif;
1881 info->hw_queue = vif->hw_queue[skb_get_queue_mapping(skb)];
1883 if (invoke_tx_handlers(&tx))
1888 *sta = &tx.sta->sta;
1893 /* this function isn't suitable for fragmented data frames */
1894 skb2 = __skb_dequeue(&tx.skbs);
1895 if (WARN_ON(skb2 != skb || !skb_queue_empty(&tx.skbs))) {
1896 ieee80211_free_txskb(hw, skb2);
1897 ieee80211_purge_tx_queue(hw, &tx.skbs);
1903 EXPORT_SYMBOL(ieee80211_tx_prepare_skb);
1906 * Returns false if the frame couldn't be transmitted but was queued instead.
1908 static bool ieee80211_tx(struct ieee80211_sub_if_data *sdata,
1909 struct sta_info *sta, struct sk_buff *skb,
1912 struct ieee80211_local *local = sdata->local;
1913 struct ieee80211_tx_data tx;
1914 ieee80211_tx_result res_prepare;
1915 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
1918 if (unlikely(skb->len < 10)) {
1923 /* initialises tx */
1924 res_prepare = ieee80211_tx_prepare(sdata, &tx, sta, skb);
1926 if (unlikely(res_prepare == TX_DROP)) {
1927 ieee80211_free_txskb(&local->hw, skb);
1929 } else if (unlikely(res_prepare == TX_QUEUED)) {
1933 /* set up hw_queue value early */
1934 if (!(info->flags & IEEE80211_TX_CTL_TX_OFFCHAN) ||
1935 !ieee80211_hw_check(&local->hw, QUEUE_CONTROL))
1937 sdata->vif.hw_queue[skb_get_queue_mapping(skb)];
1939 if (invoke_tx_handlers_early(&tx))
1942 if (ieee80211_queue_skb(local, sdata, tx.sta, tx.skb))
1945 if (!invoke_tx_handlers_late(&tx))
1946 result = __ieee80211_tx(local, &tx.skbs, tx.sta, txpending);
1951 /* device xmit handlers */
1953 enum ieee80211_encrypt {
1959 static int ieee80211_skb_resize(struct ieee80211_sub_if_data *sdata,
1960 struct sk_buff *skb,
1962 enum ieee80211_encrypt encrypt)
1964 struct ieee80211_local *local = sdata->local;
1968 enc_tailroom = encrypt == ENCRYPT_MGMT ||
1969 (encrypt == ENCRYPT_DATA &&
1970 sdata->crypto_tx_tailroom_needed_cnt);
1973 tail_need = IEEE80211_ENCRYPT_TAILROOM;
1974 tail_need -= skb_tailroom(skb);
1975 tail_need = max_t(int, tail_need, 0);
1978 if (skb_cloned(skb) &&
1979 (!ieee80211_hw_check(&local->hw, SUPPORTS_CLONED_SKBS) ||
1980 !skb_clone_writable(skb, ETH_HLEN) || enc_tailroom))
1981 I802_DEBUG_INC(local->tx_expand_skb_head_cloned);
1982 else if (head_need || tail_need)
1983 I802_DEBUG_INC(local->tx_expand_skb_head);
1987 if (pskb_expand_head(skb, head_need, tail_need, GFP_ATOMIC)) {
1988 wiphy_debug(local->hw.wiphy,
1989 "failed to reallocate TX buffer\n");
1996 void ieee80211_xmit(struct ieee80211_sub_if_data *sdata,
1997 struct sta_info *sta, struct sk_buff *skb)
1999 struct ieee80211_local *local = sdata->local;
2000 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
2001 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
2003 enum ieee80211_encrypt encrypt;
2005 if (info->flags & IEEE80211_TX_INTFL_DONT_ENCRYPT)
2006 encrypt = ENCRYPT_NO;
2007 else if (ieee80211_is_mgmt(hdr->frame_control))
2008 encrypt = ENCRYPT_MGMT;
2010 encrypt = ENCRYPT_DATA;
2012 headroom = local->tx_headroom;
2013 if (encrypt != ENCRYPT_NO)
2014 headroom += IEEE80211_ENCRYPT_HEADROOM;
2015 headroom -= skb_headroom(skb);
2016 headroom = max_t(int, 0, headroom);
2018 if (ieee80211_skb_resize(sdata, skb, headroom, encrypt)) {
2019 ieee80211_free_txskb(&local->hw, skb);
2023 /* reload after potential resize */
2024 hdr = (struct ieee80211_hdr *) skb->data;
2025 info->control.vif = &sdata->vif;
2027 if (ieee80211_vif_is_mesh(&sdata->vif)) {
2028 if (ieee80211_is_data(hdr->frame_control) &&
2029 is_unicast_ether_addr(hdr->addr1)) {
2030 if (mesh_nexthop_resolve(sdata, skb))
2031 return; /* skb queued: don't free */
2033 ieee80211_mps_set_frame_flags(sdata, NULL, hdr);
2037 ieee80211_set_qos_hdr(sdata, skb);
2038 ieee80211_tx(sdata, sta, skb, false);
2041 static bool ieee80211_validate_radiotap_len(struct sk_buff *skb)
2043 struct ieee80211_radiotap_header *rthdr =
2044 (struct ieee80211_radiotap_header *)skb->data;
2046 /* check for not even having the fixed radiotap header part */
2047 if (unlikely(skb->len < sizeof(struct ieee80211_radiotap_header)))
2048 return false; /* too short to be possibly valid */
2050 /* is it a header version we can trust to find length from? */
2051 if (unlikely(rthdr->it_version))
2052 return false; /* only version 0 is supported */
2054 /* does the skb contain enough to deliver on the alleged length? */
2055 if (unlikely(skb->len < ieee80211_get_radiotap_len(skb->data)))
2056 return false; /* skb too short for claimed rt header extent */
2061 bool ieee80211_parse_tx_radiotap(struct sk_buff *skb,
2062 struct net_device *dev)
2064 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2065 struct ieee80211_radiotap_iterator iterator;
2066 struct ieee80211_radiotap_header *rthdr =
2067 (struct ieee80211_radiotap_header *) skb->data;
2068 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
2069 int ret = ieee80211_radiotap_iterator_init(&iterator, rthdr, skb->len,
2073 bool rate_found = false;
2074 u8 rate_retries = 0;
2076 u8 mcs_known, mcs_flags, mcs_bw;
2078 u8 vht_mcs = 0, vht_nss = 0;
2081 if (!ieee80211_validate_radiotap_len(skb))
2084 info->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT |
2085 IEEE80211_TX_CTL_DONTFRAG;
2088 * for every radiotap entry that is present
2089 * (ieee80211_radiotap_iterator_next returns -ENOENT when no more
2090 * entries present, or -EINVAL on error)
2094 ret = ieee80211_radiotap_iterator_next(&iterator);
2099 /* see if this argument is something we can use */
2100 switch (iterator.this_arg_index) {
2102 * You must take care when dereferencing iterator.this_arg
2103 * for multibyte types... the pointer is not aligned. Use
2104 * get_unaligned((type *)iterator.this_arg) to dereference
2105 * iterator.this_arg for type "type" safely on all arches.
2107 case IEEE80211_RADIOTAP_FLAGS:
2108 if (*iterator.this_arg & IEEE80211_RADIOTAP_F_FCS) {
2110 * this indicates that the skb we have been
2111 * handed has the 32-bit FCS CRC at the end...
2112 * we should react to that by snipping it off
2113 * because it will be recomputed and added
2116 if (skb->len < (iterator._max_length + FCS_LEN))
2119 skb_trim(skb, skb->len - FCS_LEN);
2121 if (*iterator.this_arg & IEEE80211_RADIOTAP_F_WEP)
2122 info->flags &= ~IEEE80211_TX_INTFL_DONT_ENCRYPT;
2123 if (*iterator.this_arg & IEEE80211_RADIOTAP_F_FRAG)
2124 info->flags &= ~IEEE80211_TX_CTL_DONTFRAG;
2127 case IEEE80211_RADIOTAP_TX_FLAGS:
2128 txflags = get_unaligned_le16(iterator.this_arg);
2129 if (txflags & IEEE80211_RADIOTAP_F_TX_NOACK)
2130 info->flags |= IEEE80211_TX_CTL_NO_ACK;
2131 if (txflags & IEEE80211_RADIOTAP_F_TX_NOSEQNO)
2132 info->control.flags |= IEEE80211_TX_CTRL_NO_SEQNO;
2133 if (txflags & IEEE80211_RADIOTAP_F_TX_ORDER)
2134 info->control.flags |=
2135 IEEE80211_TX_CTRL_DONT_REORDER;
2138 case IEEE80211_RADIOTAP_RATE:
2139 rate = *iterator.this_arg;
2144 case IEEE80211_RADIOTAP_DATA_RETRIES:
2145 rate_retries = *iterator.this_arg;
2148 case IEEE80211_RADIOTAP_MCS:
2149 mcs_known = iterator.this_arg[0];
2150 mcs_flags = iterator.this_arg[1];
2151 if (!(mcs_known & IEEE80211_RADIOTAP_MCS_HAVE_MCS))
2155 rate = iterator.this_arg[2];
2156 rate_flags = IEEE80211_TX_RC_MCS;
2158 if (mcs_known & IEEE80211_RADIOTAP_MCS_HAVE_GI &&
2159 mcs_flags & IEEE80211_RADIOTAP_MCS_SGI)
2160 rate_flags |= IEEE80211_TX_RC_SHORT_GI;
2162 mcs_bw = mcs_flags & IEEE80211_RADIOTAP_MCS_BW_MASK;
2163 if (mcs_known & IEEE80211_RADIOTAP_MCS_HAVE_BW &&
2164 mcs_bw == IEEE80211_RADIOTAP_MCS_BW_40)
2165 rate_flags |= IEEE80211_TX_RC_40_MHZ_WIDTH;
2167 if (mcs_known & IEEE80211_RADIOTAP_MCS_HAVE_FEC &&
2168 mcs_flags & IEEE80211_RADIOTAP_MCS_FEC_LDPC)
2169 info->flags |= IEEE80211_TX_CTL_LDPC;
2171 if (mcs_known & IEEE80211_RADIOTAP_MCS_HAVE_STBC) {
2172 u8 stbc = u8_get_bits(mcs_flags,
2173 IEEE80211_RADIOTAP_MCS_STBC_MASK);
2176 u32_encode_bits(stbc,
2177 IEEE80211_TX_CTL_STBC);
2181 case IEEE80211_RADIOTAP_VHT:
2182 vht_known = get_unaligned_le16(iterator.this_arg);
2185 rate_flags = IEEE80211_TX_RC_VHT_MCS;
2186 if ((vht_known & IEEE80211_RADIOTAP_VHT_KNOWN_GI) &&
2187 (iterator.this_arg[2] &
2188 IEEE80211_RADIOTAP_VHT_FLAG_SGI))
2189 rate_flags |= IEEE80211_TX_RC_SHORT_GI;
2191 IEEE80211_RADIOTAP_VHT_KNOWN_BANDWIDTH) {
2192 if (iterator.this_arg[3] == 1)
2194 IEEE80211_TX_RC_40_MHZ_WIDTH;
2195 else if (iterator.this_arg[3] == 4)
2197 IEEE80211_TX_RC_80_MHZ_WIDTH;
2198 else if (iterator.this_arg[3] == 11)
2200 IEEE80211_TX_RC_160_MHZ_WIDTH;
2203 vht_mcs = iterator.this_arg[4] >> 4;
2206 vht_nss = iterator.this_arg[4] & 0xF;
2207 if (!vht_nss || vht_nss > 8)
2212 * Please update the file
2213 * Documentation/networking/mac80211-injection.rst
2214 * when parsing new fields here.
2222 if (ret != -ENOENT) /* ie, if we didn't simply run out of fields */
2226 struct ieee80211_supported_band *sband =
2227 local->hw.wiphy->bands[info->band];
2229 info->control.flags |= IEEE80211_TX_CTRL_RATE_INJECT;
2231 for (i = 0; i < IEEE80211_TX_MAX_RATES; i++) {
2232 info->control.rates[i].idx = -1;
2233 info->control.rates[i].flags = 0;
2234 info->control.rates[i].count = 0;
2237 if (rate_flags & IEEE80211_TX_RC_MCS) {
2238 info->control.rates[0].idx = rate;
2239 } else if (rate_flags & IEEE80211_TX_RC_VHT_MCS) {
2240 ieee80211_rate_set_vht(info->control.rates, vht_mcs,
2243 for (i = 0; i < sband->n_bitrates; i++) {
2244 if (rate * 5 != sband->bitrates[i].bitrate)
2247 info->control.rates[0].idx = i;
2252 if (info->control.rates[0].idx < 0)
2253 info->control.flags &= ~IEEE80211_TX_CTRL_RATE_INJECT;
2255 info->control.rates[0].flags = rate_flags;
2256 info->control.rates[0].count = min_t(u8, rate_retries + 1,
2257 local->hw.max_rate_tries);
2263 netdev_tx_t ieee80211_monitor_start_xmit(struct sk_buff *skb,
2264 struct net_device *dev)
2266 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2267 struct ieee80211_chanctx_conf *chanctx_conf;
2268 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
2269 struct ieee80211_hdr *hdr;
2270 struct ieee80211_sub_if_data *tmp_sdata, *sdata;
2271 struct cfg80211_chan_def *chandef;
2275 memset(info, 0, sizeof(*info));
2276 info->flags = IEEE80211_TX_CTL_REQ_TX_STATUS |
2277 IEEE80211_TX_CTL_INJECTED;
2279 /* Sanity-check the length of the radiotap header */
2280 if (!ieee80211_validate_radiotap_len(skb))
2283 /* we now know there is a radiotap header with a length we can use */
2284 len_rthdr = ieee80211_get_radiotap_len(skb->data);
2287 * fix up the pointers accounting for the radiotap
2288 * header still being in there. We are being given
2289 * a precooked IEEE80211 header so no need for
2292 skb_set_mac_header(skb, len_rthdr);
2294 * these are just fixed to the end of the rt area since we
2295 * don't have any better information and at this point, nobody cares
2297 skb_set_network_header(skb, len_rthdr);
2298 skb_set_transport_header(skb, len_rthdr);
2300 if (skb->len < len_rthdr + 2)
2303 hdr = (struct ieee80211_hdr *)(skb->data + len_rthdr);
2304 hdrlen = ieee80211_hdrlen(hdr->frame_control);
2306 if (skb->len < len_rthdr + hdrlen)
2310 * Initialize skb->protocol if the injected frame is a data frame
2311 * carrying a rfc1042 header
2313 if (ieee80211_is_data(hdr->frame_control) &&
2314 skb->len >= len_rthdr + hdrlen + sizeof(rfc1042_header) + 2) {
2315 u8 *payload = (u8 *)hdr + hdrlen;
2317 if (ether_addr_equal(payload, rfc1042_header))
2318 skb->protocol = cpu_to_be16((payload[6] << 8) |
2325 * We process outgoing injected frames that have a local address
2326 * we handle as though they are non-injected frames.
2327 * This code here isn't entirely correct, the local MAC address
2328 * isn't always enough to find the interface to use; for proper
2329 * VLAN support we have an nl80211-based mechanism.
2331 * This is necessary, for example, for old hostapd versions that
2332 * don't use nl80211-based management TX/RX.
2334 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2336 list_for_each_entry_rcu(tmp_sdata, &local->interfaces, list) {
2337 if (!ieee80211_sdata_running(tmp_sdata))
2339 if (tmp_sdata->vif.type == NL80211_IFTYPE_MONITOR ||
2340 tmp_sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
2342 if (ether_addr_equal(tmp_sdata->vif.addr, hdr->addr2)) {
2348 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
2349 if (!chanctx_conf) {
2350 tmp_sdata = rcu_dereference(local->monitor_sdata);
2353 rcu_dereference(tmp_sdata->vif.chanctx_conf);
2357 chandef = &chanctx_conf->def;
2358 else if (!local->use_chanctx)
2359 chandef = &local->_oper_chandef;
2364 * Frame injection is not allowed if beaconing is not allowed
2365 * or if we need radar detection. Beaconing is usually not allowed when
2366 * the mode or operation (Adhoc, AP, Mesh) does not support DFS.
2367 * Passive scan is also used in world regulatory domains where
2368 * your country is not known and as such it should be treated as
2369 * NO TX unless the channel is explicitly allowed in which case
2370 * your current regulatory domain would not have the passive scan
2373 * Since AP mode uses monitor interfaces to inject/TX management
2374 * frames we can make AP mode the exception to this rule once it
2375 * supports radar detection as its implementation can deal with
2376 * radar detection by itself. We can do that later by adding a
2377 * monitor flag interfaces used for AP support.
2379 if (!cfg80211_reg_can_beacon(local->hw.wiphy, chandef,
2383 info->band = chandef->chan->band;
2385 /* Initialize skb->priority according to frame type and TID class,
2386 * with respect to the sub interface that the frame will actually
2387 * be transmitted on. If the DONT_REORDER flag is set, the original
2388 * skb-priority is preserved to assure frames injected with this
2389 * flag are not reordered relative to each other.
2391 ieee80211_select_queue_80211(sdata, skb, hdr);
2392 skb_set_queue_mapping(skb, ieee80211_ac_from_tid(skb->priority));
2395 * Process the radiotap header. This will now take into account the
2396 * selected chandef above to accurately set injection rates and
2399 if (!ieee80211_parse_tx_radiotap(skb, dev))
2402 /* remove the injection radiotap header */
2403 skb_pull(skb, len_rthdr);
2405 ieee80211_xmit(sdata, NULL, skb);
2408 return NETDEV_TX_OK;
2414 return NETDEV_TX_OK; /* meaning, we dealt with the skb */
2417 static inline bool ieee80211_is_tdls_setup(struct sk_buff *skb)
2419 u16 ethertype = (skb->data[12] << 8) | skb->data[13];
2421 return ethertype == ETH_P_TDLS &&
2423 skb->data[14] == WLAN_TDLS_SNAP_RFTYPE;
2426 int ieee80211_lookup_ra_sta(struct ieee80211_sub_if_data *sdata,
2427 struct sk_buff *skb,
2428 struct sta_info **sta_out)
2430 struct sta_info *sta;
2432 switch (sdata->vif.type) {
2433 case NL80211_IFTYPE_AP_VLAN:
2434 sta = rcu_dereference(sdata->u.vlan.sta);
2438 } else if (sdata->wdev.use_4addr) {
2442 case NL80211_IFTYPE_AP:
2443 case NL80211_IFTYPE_OCB:
2444 case NL80211_IFTYPE_ADHOC:
2445 if (is_multicast_ether_addr(skb->data)) {
2446 *sta_out = ERR_PTR(-ENOENT);
2449 sta = sta_info_get_bss(sdata, skb->data);
2451 #ifdef CONFIG_MAC80211_MESH
2452 case NL80211_IFTYPE_MESH_POINT:
2453 /* determined much later */
2457 case NL80211_IFTYPE_STATION:
2458 if (sdata->wdev.wiphy->flags & WIPHY_FLAG_SUPPORTS_TDLS) {
2459 sta = sta_info_get(sdata, skb->data);
2460 if (sta && test_sta_flag(sta, WLAN_STA_TDLS_PEER)) {
2461 if (test_sta_flag(sta,
2462 WLAN_STA_TDLS_PEER_AUTH)) {
2468 * TDLS link during setup - throw out frames to
2469 * peer. Allow TDLS-setup frames to unauthorized
2470 * peers for the special case of a link teardown
2471 * after a TDLS sta is removed due to being
2474 if (!ieee80211_is_tdls_setup(skb))
2480 sta = sta_info_get(sdata, sdata->u.mgd.bssid);
2488 *sta_out = sta ?: ERR_PTR(-ENOENT);
2492 static u16 ieee80211_store_ack_skb(struct ieee80211_local *local,
2493 struct sk_buff *skb,
2497 struct sk_buff *ack_skb;
2501 ack_skb = skb_clone_sk(skb);
2503 ack_skb = skb_clone(skb, GFP_ATOMIC);
2506 unsigned long flags;
2509 spin_lock_irqsave(&local->ack_status_lock, flags);
2510 id = idr_alloc(&local->ack_status_frames, ack_skb,
2511 1, 0x2000, GFP_ATOMIC);
2512 spin_unlock_irqrestore(&local->ack_status_lock, flags);
2516 *info_flags |= IEEE80211_TX_CTL_REQ_TX_STATUS;
2518 *cookie = ieee80211_mgmt_tx_cookie(local);
2519 IEEE80211_SKB_CB(ack_skb)->ack.cookie = *cookie;
2530 * ieee80211_build_hdr - build 802.11 header in the given frame
2531 * @sdata: virtual interface to build the header for
2532 * @skb: the skb to build the header in
2533 * @info_flags: skb flags to set
2534 * @sta: the station pointer
2535 * @ctrl_flags: info control flags to set
2536 * @cookie: cookie pointer to fill (if not %NULL)
2538 * This function takes the skb with 802.3 header and reformats the header to
2539 * the appropriate IEEE 802.11 header based on which interface the packet is
2540 * being transmitted on.
2542 * Note that this function also takes care of the TX status request and
2543 * potential unsharing of the SKB - this needs to be interleaved with the
2546 * The function requires the read-side RCU lock held
2548 * Returns: the (possibly reallocated) skb or an ERR_PTR() code
2550 static struct sk_buff *ieee80211_build_hdr(struct ieee80211_sub_if_data *sdata,
2551 struct sk_buff *skb, u32 info_flags,
2552 struct sta_info *sta, u32 ctrl_flags,
2555 struct ieee80211_local *local = sdata->local;
2556 struct ieee80211_tx_info *info;
2558 u16 ethertype, hdrlen, meshhdrlen = 0;
2560 struct ieee80211_hdr hdr;
2561 struct ieee80211s_hdr mesh_hdr __maybe_unused;
2562 struct mesh_path __maybe_unused *mppath = NULL, *mpath = NULL;
2563 const u8 *encaps_data;
2564 int encaps_len, skip_header_bytes;
2565 bool wme_sta = false, authorized = false;
2569 struct ieee80211_chanctx_conf *chanctx_conf;
2570 struct ieee80211_sub_if_data *ap_sdata;
2571 enum nl80211_band band;
2577 #ifdef CONFIG_MAC80211_DEBUGFS
2578 if (local->force_tx_status)
2579 info_flags |= IEEE80211_TX_CTL_REQ_TX_STATUS;
2582 /* convert Ethernet header to proper 802.11 header (based on
2583 * operation mode) */
2584 ethertype = (skb->data[12] << 8) | skb->data[13];
2585 fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_DATA);
2587 switch (sdata->vif.type) {
2588 case NL80211_IFTYPE_AP_VLAN:
2589 if (sdata->wdev.use_4addr) {
2590 fc |= cpu_to_le16(IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS);
2592 memcpy(hdr.addr1, sta->sta.addr, ETH_ALEN);
2593 memcpy(hdr.addr2, sdata->vif.addr, ETH_ALEN);
2594 memcpy(hdr.addr3, skb->data, ETH_ALEN);
2595 memcpy(hdr.addr4, skb->data + ETH_ALEN, ETH_ALEN);
2597 authorized = test_sta_flag(sta, WLAN_STA_AUTHORIZED);
2598 wme_sta = sta->sta.wme;
2600 ap_sdata = container_of(sdata->bss, struct ieee80211_sub_if_data,
2602 chanctx_conf = rcu_dereference(ap_sdata->vif.chanctx_conf);
2603 if (!chanctx_conf) {
2607 band = chanctx_conf->def.chan->band;
2608 if (sdata->wdev.use_4addr)
2611 case NL80211_IFTYPE_AP:
2612 if (sdata->vif.type == NL80211_IFTYPE_AP)
2613 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
2614 if (!chanctx_conf) {
2618 fc |= cpu_to_le16(IEEE80211_FCTL_FROMDS);
2620 memcpy(hdr.addr1, skb->data, ETH_ALEN);
2621 memcpy(hdr.addr2, sdata->vif.addr, ETH_ALEN);
2622 memcpy(hdr.addr3, skb->data + ETH_ALEN, ETH_ALEN);
2624 band = chanctx_conf->def.chan->band;
2626 #ifdef CONFIG_MAC80211_MESH
2627 case NL80211_IFTYPE_MESH_POINT:
2628 if (!is_multicast_ether_addr(skb->data)) {
2629 struct sta_info *next_hop;
2630 bool mpp_lookup = true;
2632 mpath = mesh_path_lookup(sdata, skb->data);
2635 next_hop = rcu_dereference(mpath->next_hop);
2637 !(mpath->flags & (MESH_PATH_ACTIVE |
2638 MESH_PATH_RESOLVING)))
2643 mppath = mpp_path_lookup(sdata, skb->data);
2645 mppath->exp_time = jiffies;
2648 if (mppath && mpath)
2649 mesh_path_del(sdata, mpath->dst);
2653 * Use address extension if it is a packet from
2654 * another interface or if we know the destination
2655 * is being proxied by a portal (i.e. portal address
2656 * differs from proxied address)
2658 if (ether_addr_equal(sdata->vif.addr, skb->data + ETH_ALEN) &&
2659 !(mppath && !ether_addr_equal(mppath->mpp, skb->data))) {
2660 hdrlen = ieee80211_fill_mesh_addresses(&hdr, &fc,
2661 skb->data, skb->data + ETH_ALEN);
2662 meshhdrlen = ieee80211_new_mesh_header(sdata, &mesh_hdr,
2665 /* DS -> MBSS (802.11-2012 13.11.3.3).
2666 * For unicast with unknown forwarding information,
2667 * destination might be in the MBSS or if that fails
2668 * forwarded to another mesh gate. In either case
2669 * resolution will be handled in ieee80211_xmit(), so
2670 * leave the original DA. This also works for mcast */
2671 const u8 *mesh_da = skb->data;
2674 mesh_da = mppath->mpp;
2676 mesh_da = mpath->dst;
2678 hdrlen = ieee80211_fill_mesh_addresses(&hdr, &fc,
2679 mesh_da, sdata->vif.addr);
2680 if (is_multicast_ether_addr(mesh_da))
2681 /* DA TA mSA AE:SA */
2682 meshhdrlen = ieee80211_new_mesh_header(
2684 skb->data + ETH_ALEN, NULL);
2686 /* RA TA mDA mSA AE:DA SA */
2687 meshhdrlen = ieee80211_new_mesh_header(
2688 sdata, &mesh_hdr, skb->data,
2689 skb->data + ETH_ALEN);
2692 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
2693 if (!chanctx_conf) {
2697 band = chanctx_conf->def.chan->band;
2699 /* For injected frames, fill RA right away as nexthop lookup
2702 if ((ctrl_flags & IEEE80211_TX_CTRL_SKIP_MPATH_LOOKUP) &&
2703 is_zero_ether_addr(hdr.addr1))
2704 memcpy(hdr.addr1, skb->data, ETH_ALEN);
2707 case NL80211_IFTYPE_STATION:
2708 /* we already did checks when looking up the RA STA */
2709 tdls_peer = test_sta_flag(sta, WLAN_STA_TDLS_PEER);
2713 memcpy(hdr.addr1, skb->data, ETH_ALEN);
2714 memcpy(hdr.addr2, skb->data + ETH_ALEN, ETH_ALEN);
2715 memcpy(hdr.addr3, sdata->u.mgd.bssid, ETH_ALEN);
2717 } else if (sdata->u.mgd.use_4addr &&
2718 cpu_to_be16(ethertype) != sdata->control_port_protocol) {
2719 fc |= cpu_to_le16(IEEE80211_FCTL_FROMDS |
2720 IEEE80211_FCTL_TODS);
2722 memcpy(hdr.addr1, sdata->u.mgd.bssid, ETH_ALEN);
2723 memcpy(hdr.addr2, sdata->vif.addr, ETH_ALEN);
2724 memcpy(hdr.addr3, skb->data, ETH_ALEN);
2725 memcpy(hdr.addr4, skb->data + ETH_ALEN, ETH_ALEN);
2728 fc |= cpu_to_le16(IEEE80211_FCTL_TODS);
2730 memcpy(hdr.addr1, sdata->u.mgd.bssid, ETH_ALEN);
2731 memcpy(hdr.addr2, skb->data + ETH_ALEN, ETH_ALEN);
2732 memcpy(hdr.addr3, skb->data, ETH_ALEN);
2735 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
2736 if (!chanctx_conf) {
2740 band = chanctx_conf->def.chan->band;
2742 case NL80211_IFTYPE_OCB:
2744 memcpy(hdr.addr1, skb->data, ETH_ALEN);
2745 memcpy(hdr.addr2, skb->data + ETH_ALEN, ETH_ALEN);
2746 eth_broadcast_addr(hdr.addr3);
2748 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
2749 if (!chanctx_conf) {
2753 band = chanctx_conf->def.chan->band;
2755 case NL80211_IFTYPE_ADHOC:
2757 memcpy(hdr.addr1, skb->data, ETH_ALEN);
2758 memcpy(hdr.addr2, skb->data + ETH_ALEN, ETH_ALEN);
2759 memcpy(hdr.addr3, sdata->u.ibss.bssid, ETH_ALEN);
2761 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
2762 if (!chanctx_conf) {
2766 band = chanctx_conf->def.chan->band;
2773 multicast = is_multicast_ether_addr(hdr.addr1);
2775 /* sta is always NULL for mesh */
2777 authorized = test_sta_flag(sta, WLAN_STA_AUTHORIZED);
2778 wme_sta = sta->sta.wme;
2779 } else if (ieee80211_vif_is_mesh(&sdata->vif)) {
2780 /* For mesh, the use of the QoS header is mandatory */
2784 /* receiver does QoS (which also means we do) use it */
2786 fc |= cpu_to_le16(IEEE80211_STYPE_QOS_DATA);
2791 * Drop unicast frames to unauthorised stations unless they are
2792 * EAPOL frames from the local station.
2794 if (unlikely(!ieee80211_vif_is_mesh(&sdata->vif) &&
2795 (sdata->vif.type != NL80211_IFTYPE_OCB) &&
2796 !multicast && !authorized &&
2797 (cpu_to_be16(ethertype) != sdata->control_port_protocol ||
2798 !ether_addr_equal(sdata->vif.addr, skb->data + ETH_ALEN)))) {
2799 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
2800 net_info_ratelimited("%s: dropped frame to %pM (unauthorized port)\n",
2801 sdata->name, hdr.addr1);
2804 I802_DEBUG_INC(local->tx_handlers_drop_unauth_port);
2810 if (unlikely(!multicast && ((skb->sk &&
2811 skb_shinfo(skb)->tx_flags & SKBTX_WIFI_STATUS) ||
2812 ctrl_flags & IEEE80211_TX_CTL_REQ_TX_STATUS)))
2813 info_id = ieee80211_store_ack_skb(local, skb, &info_flags,
2817 * If the skb is shared we need to obtain our own copy.
2819 if (skb_shared(skb)) {
2820 struct sk_buff *tmp_skb = skb;
2822 /* can't happen -- skb is a clone if info_id != 0 */
2825 skb = skb_clone(skb, GFP_ATOMIC);
2834 hdr.frame_control = fc;
2835 hdr.duration_id = 0;
2838 skip_header_bytes = ETH_HLEN;
2839 if (ethertype == ETH_P_AARP || ethertype == ETH_P_IPX) {
2840 encaps_data = bridge_tunnel_header;
2841 encaps_len = sizeof(bridge_tunnel_header);
2842 skip_header_bytes -= 2;
2843 } else if (ethertype >= ETH_P_802_3_MIN) {
2844 encaps_data = rfc1042_header;
2845 encaps_len = sizeof(rfc1042_header);
2846 skip_header_bytes -= 2;
2852 skb_pull(skb, skip_header_bytes);
2853 head_need = hdrlen + encaps_len + meshhdrlen - skb_headroom(skb);
2856 * So we need to modify the skb header and hence need a copy of
2857 * that. The head_need variable above doesn't, so far, include
2858 * the needed header space that we don't need right away. If we
2859 * can, then we don't reallocate right now but only after the
2860 * frame arrives at the master device (if it does...)
2862 * If we cannot, however, then we will reallocate to include all
2863 * the ever needed space. Also, if we need to reallocate it anyway,
2864 * make it big enough for everything we may ever need.
2867 if (head_need > 0 || skb_cloned(skb)) {
2868 head_need += IEEE80211_ENCRYPT_HEADROOM;
2869 head_need += local->tx_headroom;
2870 head_need = max_t(int, 0, head_need);
2871 if (ieee80211_skb_resize(sdata, skb, head_need, ENCRYPT_DATA)) {
2872 ieee80211_free_txskb(&local->hw, skb);
2874 return ERR_PTR(-ENOMEM);
2879 memcpy(skb_push(skb, encaps_len), encaps_data, encaps_len);
2881 #ifdef CONFIG_MAC80211_MESH
2883 memcpy(skb_push(skb, meshhdrlen), &mesh_hdr, meshhdrlen);
2886 if (ieee80211_is_data_qos(fc)) {
2887 __le16 *qos_control;
2889 qos_control = skb_push(skb, 2);
2890 memcpy(skb_push(skb, hdrlen - 2), &hdr, hdrlen - 2);
2892 * Maybe we could actually set some fields here, for now just
2893 * initialise to zero to indicate no special operation.
2897 memcpy(skb_push(skb, hdrlen), &hdr, hdrlen);
2899 skb_reset_mac_header(skb);
2901 info = IEEE80211_SKB_CB(skb);
2902 memset(info, 0, sizeof(*info));
2904 info->flags = info_flags;
2905 info->ack_frame_id = info_id;
2907 info->control.flags = ctrl_flags;
2912 return ERR_PTR(ret);
2916 * fast-xmit overview
2918 * The core idea of this fast-xmit is to remove per-packet checks by checking
2919 * them out of band. ieee80211_check_fast_xmit() implements the out-of-band
2920 * checks that are needed to get the sta->fast_tx pointer assigned, after which
2921 * much less work can be done per packet. For example, fragmentation must be
2922 * disabled or the fast_tx pointer will not be set. All the conditions are seen
2925 * Once assigned, the fast_tx data structure also caches the per-packet 802.11
2926 * header and other data to aid packet processing in ieee80211_xmit_fast().
2928 * The most difficult part of this is that when any of these assumptions
2929 * change, an external trigger (i.e. a call to ieee80211_clear_fast_xmit(),
2930 * ieee80211_check_fast_xmit() or friends) is required to reset the data,
2931 * since the per-packet code no longer checks the conditions. This is reflected
2932 * by the calls to these functions throughout the rest of the code, and must be
2933 * maintained if any of the TX path checks change.
2936 void ieee80211_check_fast_xmit(struct sta_info *sta)
2938 struct ieee80211_fast_tx build = {}, *fast_tx = NULL, *old;
2939 struct ieee80211_local *local = sta->local;
2940 struct ieee80211_sub_if_data *sdata = sta->sdata;
2941 struct ieee80211_hdr *hdr = (void *)build.hdr;
2942 struct ieee80211_chanctx_conf *chanctx_conf;
2945 if (!ieee80211_hw_check(&local->hw, SUPPORT_FAST_XMIT))
2948 /* Locking here protects both the pointer itself, and against concurrent
2949 * invocations winning data access races to, e.g., the key pointer that
2951 * Without it, the invocation of this function right after the key
2952 * pointer changes wouldn't be sufficient, as another CPU could access
2953 * the pointer, then stall, and then do the cache update after the CPU
2954 * that invalidated the key.
2955 * With the locking, such scenarios cannot happen as the check for the
2956 * key and the fast-tx assignment are done atomically, so the CPU that
2957 * modifies the key will either wait or other one will see the key
2958 * cleared/changed already.
2960 spin_lock_bh(&sta->lock);
2961 if (ieee80211_hw_check(&local->hw, SUPPORTS_PS) &&
2962 !ieee80211_hw_check(&local->hw, SUPPORTS_DYNAMIC_PS) &&
2963 sdata->vif.type == NL80211_IFTYPE_STATION)
2966 if (!test_sta_flag(sta, WLAN_STA_AUTHORIZED))
2969 if (test_sta_flag(sta, WLAN_STA_PS_STA) ||
2970 test_sta_flag(sta, WLAN_STA_PS_DRIVER) ||
2971 test_sta_flag(sta, WLAN_STA_PS_DELIVER) ||
2972 test_sta_flag(sta, WLAN_STA_CLEAR_PS_FILT))
2975 if (sdata->noack_map)
2978 /* fast-xmit doesn't handle fragmentation at all */
2979 if (local->hw.wiphy->frag_threshold != (u32)-1 &&
2980 !ieee80211_hw_check(&local->hw, SUPPORTS_TX_FRAG))
2984 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
2985 if (!chanctx_conf) {
2989 build.band = chanctx_conf->def.chan->band;
2992 fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_DATA);
2994 switch (sdata->vif.type) {
2995 case NL80211_IFTYPE_ADHOC:
2997 build.da_offs = offsetof(struct ieee80211_hdr, addr1);
2998 build.sa_offs = offsetof(struct ieee80211_hdr, addr2);
2999 memcpy(hdr->addr3, sdata->u.ibss.bssid, ETH_ALEN);
3002 case NL80211_IFTYPE_STATION:
3003 if (test_sta_flag(sta, WLAN_STA_TDLS_PEER)) {
3005 build.da_offs = offsetof(struct ieee80211_hdr, addr1);
3006 build.sa_offs = offsetof(struct ieee80211_hdr, addr2);
3007 memcpy(hdr->addr3, sdata->u.mgd.bssid, ETH_ALEN);
3012 if (sdata->u.mgd.use_4addr) {
3013 /* non-regular ethertype cannot use the fastpath */
3014 fc |= cpu_to_le16(IEEE80211_FCTL_FROMDS |
3015 IEEE80211_FCTL_TODS);
3017 memcpy(hdr->addr1, sdata->u.mgd.bssid, ETH_ALEN);
3018 memcpy(hdr->addr2, sdata->vif.addr, ETH_ALEN);
3019 build.da_offs = offsetof(struct ieee80211_hdr, addr3);
3020 build.sa_offs = offsetof(struct ieee80211_hdr, addr4);
3024 fc |= cpu_to_le16(IEEE80211_FCTL_TODS);
3026 memcpy(hdr->addr1, sdata->u.mgd.bssid, ETH_ALEN);
3027 build.da_offs = offsetof(struct ieee80211_hdr, addr3);
3028 build.sa_offs = offsetof(struct ieee80211_hdr, addr2);
3031 case NL80211_IFTYPE_AP_VLAN:
3032 if (sdata->wdev.use_4addr) {
3033 fc |= cpu_to_le16(IEEE80211_FCTL_FROMDS |
3034 IEEE80211_FCTL_TODS);
3036 memcpy(hdr->addr1, sta->sta.addr, ETH_ALEN);
3037 memcpy(hdr->addr2, sdata->vif.addr, ETH_ALEN);
3038 build.da_offs = offsetof(struct ieee80211_hdr, addr3);
3039 build.sa_offs = offsetof(struct ieee80211_hdr, addr4);
3044 case NL80211_IFTYPE_AP:
3045 fc |= cpu_to_le16(IEEE80211_FCTL_FROMDS);
3047 build.da_offs = offsetof(struct ieee80211_hdr, addr1);
3048 memcpy(hdr->addr2, sdata->vif.addr, ETH_ALEN);
3049 build.sa_offs = offsetof(struct ieee80211_hdr, addr3);
3053 /* not handled on fast-xmit */
3059 fc |= cpu_to_le16(IEEE80211_STYPE_QOS_DATA);
3062 /* We store the key here so there's no point in using rcu_dereference()
3063 * but that's fine because the code that changes the pointers will call
3064 * this function after doing so. For a single CPU that would be enough,
3065 * for multiple see the comment above.
3067 build.key = rcu_access_pointer(sta->ptk[sta->ptk_idx]);
3069 build.key = rcu_access_pointer(sdata->default_unicast_key);
3071 bool gen_iv, iv_spc, mmic;
3073 gen_iv = build.key->conf.flags & IEEE80211_KEY_FLAG_GENERATE_IV;
3074 iv_spc = build.key->conf.flags & IEEE80211_KEY_FLAG_PUT_IV_SPACE;
3075 mmic = build.key->conf.flags &
3076 (IEEE80211_KEY_FLAG_GENERATE_MMIC |
3077 IEEE80211_KEY_FLAG_PUT_MIC_SPACE);
3079 /* don't handle software crypto */
3080 if (!(build.key->flags & KEY_FLAG_UPLOADED_TO_HARDWARE))
3083 /* Key is being removed */
3084 if (build.key->flags & KEY_FLAG_TAINTED)
3087 switch (build.key->conf.cipher) {
3088 case WLAN_CIPHER_SUITE_CCMP:
3089 case WLAN_CIPHER_SUITE_CCMP_256:
3091 build.pn_offs = build.hdr_len;
3092 if (gen_iv || iv_spc)
3093 build.hdr_len += IEEE80211_CCMP_HDR_LEN;
3095 case WLAN_CIPHER_SUITE_GCMP:
3096 case WLAN_CIPHER_SUITE_GCMP_256:
3098 build.pn_offs = build.hdr_len;
3099 if (gen_iv || iv_spc)
3100 build.hdr_len += IEEE80211_GCMP_HDR_LEN;
3102 case WLAN_CIPHER_SUITE_TKIP:
3103 /* cannot handle MMIC or IV generation in xmit-fast */
3107 build.hdr_len += IEEE80211_TKIP_IV_LEN;
3109 case WLAN_CIPHER_SUITE_WEP40:
3110 case WLAN_CIPHER_SUITE_WEP104:
3111 /* cannot handle IV generation in fast-xmit */
3115 build.hdr_len += IEEE80211_WEP_IV_LEN;
3117 case WLAN_CIPHER_SUITE_AES_CMAC:
3118 case WLAN_CIPHER_SUITE_BIP_CMAC_256:
3119 case WLAN_CIPHER_SUITE_BIP_GMAC_128:
3120 case WLAN_CIPHER_SUITE_BIP_GMAC_256:
3122 "management cipher suite 0x%x enabled for data\n",
3123 build.key->conf.cipher);
3126 /* we don't know how to generate IVs for this at all */
3127 if (WARN_ON(gen_iv))
3131 fc |= cpu_to_le16(IEEE80211_FCTL_PROTECTED);
3134 hdr->frame_control = fc;
3136 memcpy(build.hdr + build.hdr_len,
3137 rfc1042_header, sizeof(rfc1042_header));
3138 build.hdr_len += sizeof(rfc1042_header);
3140 fast_tx = kmemdup(&build, sizeof(build), GFP_ATOMIC);
3141 /* if the kmemdup fails, continue w/o fast_tx */
3144 /* we might have raced against another call to this function */
3145 old = rcu_dereference_protected(sta->fast_tx,
3146 lockdep_is_held(&sta->lock));
3147 rcu_assign_pointer(sta->fast_tx, fast_tx);
3149 kfree_rcu(old, rcu_head);
3150 spin_unlock_bh(&sta->lock);
3153 void ieee80211_check_fast_xmit_all(struct ieee80211_local *local)
3155 struct sta_info *sta;
3158 list_for_each_entry_rcu(sta, &local->sta_list, list)
3159 ieee80211_check_fast_xmit(sta);
3163 void ieee80211_check_fast_xmit_iface(struct ieee80211_sub_if_data *sdata)
3165 struct ieee80211_local *local = sdata->local;
3166 struct sta_info *sta;
3170 list_for_each_entry_rcu(sta, &local->sta_list, list) {
3171 if (sdata != sta->sdata &&
3172 (!sta->sdata->bss || sta->sdata->bss != sdata->bss))
3174 ieee80211_check_fast_xmit(sta);
3180 void ieee80211_clear_fast_xmit(struct sta_info *sta)
3182 struct ieee80211_fast_tx *fast_tx;
3184 spin_lock_bh(&sta->lock);
3185 fast_tx = rcu_dereference_protected(sta->fast_tx,
3186 lockdep_is_held(&sta->lock));
3187 RCU_INIT_POINTER(sta->fast_tx, NULL);
3188 spin_unlock_bh(&sta->lock);
3191 kfree_rcu(fast_tx, rcu_head);
3194 static bool ieee80211_amsdu_realloc_pad(struct ieee80211_local *local,
3195 struct sk_buff *skb, int headroom)
3197 if (skb_headroom(skb) < headroom) {
3198 I802_DEBUG_INC(local->tx_expand_skb_head);
3200 if (pskb_expand_head(skb, headroom, 0, GFP_ATOMIC)) {
3201 wiphy_debug(local->hw.wiphy,
3202 "failed to reallocate TX buffer\n");
3210 static bool ieee80211_amsdu_prepare_head(struct ieee80211_sub_if_data *sdata,
3211 struct ieee80211_fast_tx *fast_tx,
3212 struct sk_buff *skb)
3214 struct ieee80211_local *local = sdata->local;
3215 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
3216 struct ieee80211_hdr *hdr;
3217 struct ethhdr *amsdu_hdr;
3218 int hdr_len = fast_tx->hdr_len - sizeof(rfc1042_header);
3219 int subframe_len = skb->len - hdr_len;
3221 u8 *qc, *h_80211_src, *h_80211_dst;
3224 if (info->flags & IEEE80211_TX_CTL_RATE_CTRL_PROBE)
3227 if (info->control.flags & IEEE80211_TX_CTRL_AMSDU)
3230 if (!ieee80211_amsdu_realloc_pad(local, skb,
3231 sizeof(*amsdu_hdr) +
3232 local->hw.extra_tx_headroom))
3235 data = skb_push(skb, sizeof(*amsdu_hdr));
3236 memmove(data, data + sizeof(*amsdu_hdr), hdr_len);
3238 amsdu_hdr = data + hdr_len;
3239 /* h_80211_src/dst is addr* field within hdr */
3240 h_80211_src = data + fast_tx->sa_offs;
3241 h_80211_dst = data + fast_tx->da_offs;
3243 amsdu_hdr->h_proto = cpu_to_be16(subframe_len);
3244 ether_addr_copy(amsdu_hdr->h_source, h_80211_src);
3245 ether_addr_copy(amsdu_hdr->h_dest, h_80211_dst);
3247 /* according to IEEE 802.11-2012 8.3.2 table 8-19, the outer SA/DA
3248 * fields needs to be changed to BSSID for A-MSDU frames depending
3249 * on FromDS/ToDS values.
3251 switch (sdata->vif.type) {
3252 case NL80211_IFTYPE_STATION:
3253 bssid = sdata->u.mgd.bssid;
3255 case NL80211_IFTYPE_AP:
3256 case NL80211_IFTYPE_AP_VLAN:
3257 bssid = sdata->vif.addr;
3263 if (bssid && ieee80211_has_fromds(hdr->frame_control))
3264 ether_addr_copy(h_80211_src, bssid);
3266 if (bssid && ieee80211_has_tods(hdr->frame_control))
3267 ether_addr_copy(h_80211_dst, bssid);
3269 qc = ieee80211_get_qos_ctl(hdr);
3270 *qc |= IEEE80211_QOS_CTL_A_MSDU_PRESENT;
3272 info->control.flags |= IEEE80211_TX_CTRL_AMSDU;
3277 static bool ieee80211_amsdu_aggregate(struct ieee80211_sub_if_data *sdata,
3278 struct sta_info *sta,
3279 struct ieee80211_fast_tx *fast_tx,
3280 struct sk_buff *skb)
3282 struct ieee80211_local *local = sdata->local;
3283 struct fq *fq = &local->fq;
3285 struct fq_flow *flow;
3286 u8 tid = skb->priority & IEEE80211_QOS_CTL_TAG1D_MASK;
3287 struct ieee80211_txq *txq = sta->sta.txq[tid];
3288 struct txq_info *txqi;
3289 struct sk_buff **frag_tail, *head;
3290 int subframe_len = skb->len - ETH_ALEN;
3291 u8 max_subframes = sta->sta.max_amsdu_subframes;
3292 int max_frags = local->hw.max_tx_fragments;
3293 int max_amsdu_len = sta->sta.max_amsdu_len;
3299 unsigned int orig_len;
3300 int n = 2, nfrags, pad = 0;
3303 if (!ieee80211_hw_check(&local->hw, TX_AMSDU))
3306 if (sdata->vif.offload_flags & IEEE80211_OFFLOAD_ENCAP_ENABLED)
3309 if (skb_is_gso(skb))
3315 txqi = to_txq_info(txq);
3316 if (test_bit(IEEE80211_TXQ_NO_AMSDU, &txqi->flags))
3319 if (sta->sta.max_rc_amsdu_len)
3320 max_amsdu_len = min_t(int, max_amsdu_len,
3321 sta->sta.max_rc_amsdu_len);
3323 if (sta->sta.max_tid_amsdu_len[tid])
3324 max_amsdu_len = min_t(int, max_amsdu_len,
3325 sta->sta.max_tid_amsdu_len[tid]);
3327 flow_idx = fq_flow_idx(fq, skb);
3329 spin_lock_bh(&fq->lock);
3331 /* TODO: Ideally aggregation should be done on dequeue to remain
3332 * responsive to environment changes.
3336 flow = fq_flow_classify(fq, tin, flow_idx, skb);
3337 head = skb_peek_tail(&flow->queue);
3338 if (!head || skb_is_gso(head))
3341 orig_truesize = head->truesize;
3342 orig_len = head->len;
3344 if (skb->len + head->len > max_amsdu_len)
3347 nfrags = 1 + skb_shinfo(skb)->nr_frags;
3348 nfrags += 1 + skb_shinfo(head)->nr_frags;
3349 frag_tail = &skb_shinfo(head)->frag_list;
3350 while (*frag_tail) {
3351 nfrags += 1 + skb_shinfo(*frag_tail)->nr_frags;
3352 frag_tail = &(*frag_tail)->next;
3356 if (max_subframes && n > max_subframes)
3359 if (max_frags && nfrags > max_frags)
3362 if (!drv_can_aggregate_in_amsdu(local, head, skb))
3365 if (!ieee80211_amsdu_prepare_head(sdata, fast_tx, head))
3368 /* If n == 2, the "while (*frag_tail)" loop above didn't execute
3369 * and frag_tail should be &skb_shinfo(head)->frag_list.
3370 * However, ieee80211_amsdu_prepare_head() can reallocate it.
3371 * Reload frag_tail to have it pointing to the correct place.
3374 frag_tail = &skb_shinfo(head)->frag_list;
3377 * Pad out the previous subframe to a multiple of 4 by adding the
3378 * padding to the next one, that's being added. Note that head->len
3379 * is the length of the full A-MSDU, but that works since each time
3380 * we add a new subframe we pad out the previous one to a multiple
3381 * of 4 and thus it no longer matters in the next round.
3383 hdrlen = fast_tx->hdr_len - sizeof(rfc1042_header);
3384 if ((head->len - hdrlen) & 3)
3385 pad = 4 - ((head->len - hdrlen) & 3);
3387 if (!ieee80211_amsdu_realloc_pad(local, skb, sizeof(rfc1042_header) +
3392 data = skb_push(skb, ETH_ALEN + 2);
3393 memmove(data, data + ETH_ALEN + 2, 2 * ETH_ALEN);
3395 data += 2 * ETH_ALEN;
3396 len = cpu_to_be16(subframe_len);
3397 memcpy(data, &len, 2);
3398 memcpy(data + 2, rfc1042_header, sizeof(rfc1042_header));
3400 memset(skb_push(skb, pad), 0, pad);
3402 head->len += skb->len;
3403 head->data_len += skb->len;
3407 fq->memory_usage += head->truesize - orig_truesize;
3408 if (head->len != orig_len) {
3409 flow->backlog += head->len - orig_len;
3410 tin->backlog_bytes += head->len - orig_len;
3413 spin_unlock_bh(&fq->lock);
3419 * Can be called while the sta lock is held. Anything that can cause packets to
3420 * be generated will cause deadlock!
3422 static ieee80211_tx_result
3423 ieee80211_xmit_fast_finish(struct ieee80211_sub_if_data *sdata,
3424 struct sta_info *sta, u8 pn_offs,
3425 struct ieee80211_key *key,
3426 struct ieee80211_tx_data *tx)
3428 struct sk_buff *skb = tx->skb;
3429 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
3430 struct ieee80211_hdr *hdr = (void *)skb->data;
3431 u8 tid = IEEE80211_NUM_TIDS;
3433 if (!ieee80211_hw_check(&tx->local->hw, HAS_RATE_CONTROL) &&
3434 ieee80211_tx_h_rate_ctrl(tx) != TX_CONTINUE)
3438 info->control.hw_key = &key->conf;
3440 dev_sw_netstats_tx_add(skb->dev, 1, skb->len);
3442 if (hdr->frame_control & cpu_to_le16(IEEE80211_STYPE_QOS_DATA)) {
3443 tid = skb->priority & IEEE80211_QOS_CTL_TAG1D_MASK;
3444 hdr->seq_ctrl = ieee80211_tx_next_seq(sta, tid);
3446 info->flags |= IEEE80211_TX_CTL_ASSIGN_SEQ;
3447 hdr->seq_ctrl = cpu_to_le16(sdata->sequence_number);
3448 sdata->sequence_number += 0x10;
3451 if (skb_shinfo(skb)->gso_size)
3452 sta->deflink.tx_stats.msdu[tid] +=
3453 DIV_ROUND_UP(skb->len, skb_shinfo(skb)->gso_size);
3455 sta->deflink.tx_stats.msdu[tid]++;
3457 info->hw_queue = sdata->vif.hw_queue[skb_get_queue_mapping(skb)];
3459 /* statistics normally done by ieee80211_tx_h_stats (but that
3460 * has to consider fragmentation, so is more complex)
3462 sta->deflink.tx_stats.bytes[skb_get_queue_mapping(skb)] += skb->len;
3463 sta->deflink.tx_stats.packets[skb_get_queue_mapping(skb)]++;
3467 u8 *crypto_hdr = skb->data + pn_offs;
3469 switch (key->conf.cipher) {
3470 case WLAN_CIPHER_SUITE_CCMP:
3471 case WLAN_CIPHER_SUITE_CCMP_256:
3472 case WLAN_CIPHER_SUITE_GCMP:
3473 case WLAN_CIPHER_SUITE_GCMP_256:
3474 pn = atomic64_inc_return(&key->conf.tx_pn);
3476 crypto_hdr[1] = pn >> 8;
3477 crypto_hdr[3] = 0x20 | (key->conf.keyidx << 6);
3478 crypto_hdr[4] = pn >> 16;
3479 crypto_hdr[5] = pn >> 24;
3480 crypto_hdr[6] = pn >> 32;
3481 crypto_hdr[7] = pn >> 40;
3489 static bool ieee80211_xmit_fast(struct ieee80211_sub_if_data *sdata,
3490 struct sta_info *sta,
3491 struct ieee80211_fast_tx *fast_tx,
3492 struct sk_buff *skb)
3494 struct ieee80211_local *local = sdata->local;
3495 u16 ethertype = (skb->data[12] << 8) | skb->data[13];
3496 int extra_head = fast_tx->hdr_len - (ETH_HLEN - 2);
3497 int hw_headroom = sdata->local->hw.extra_tx_headroom;
3499 struct ieee80211_tx_info *info;
3500 struct ieee80211_hdr *hdr = (void *)fast_tx->hdr;
3501 struct ieee80211_tx_data tx;
3502 ieee80211_tx_result r;
3503 struct tid_ampdu_tx *tid_tx = NULL;
3504 u8 tid = IEEE80211_NUM_TIDS;
3506 /* control port protocol needs a lot of special handling */
3507 if (cpu_to_be16(ethertype) == sdata->control_port_protocol)
3510 /* only RFC 1042 SNAP */
3511 if (ethertype < ETH_P_802_3_MIN)
3514 /* don't handle TX status request here either */
3515 if (skb->sk && skb_shinfo(skb)->tx_flags & SKBTX_WIFI_STATUS)
3518 if (hdr->frame_control & cpu_to_le16(IEEE80211_STYPE_QOS_DATA)) {
3519 tid = skb->priority & IEEE80211_QOS_CTL_TAG1D_MASK;
3520 tid_tx = rcu_dereference(sta->ampdu_mlme.tid_tx[tid]);
3522 if (!test_bit(HT_AGG_STATE_OPERATIONAL, &tid_tx->state))
3524 if (tid_tx->timeout)
3525 tid_tx->last_tx = jiffies;
3529 /* after this point (skb is modified) we cannot return false */
3531 if (skb_shared(skb)) {
3532 struct sk_buff *tmp_skb = skb;
3534 skb = skb_clone(skb, GFP_ATOMIC);
3541 if ((hdr->frame_control & cpu_to_le16(IEEE80211_STYPE_QOS_DATA)) &&
3542 ieee80211_amsdu_aggregate(sdata, sta, fast_tx, skb))
3545 /* will not be crypto-handled beyond what we do here, so use false
3546 * as the may-encrypt argument for the resize to not account for
3547 * more room than we already have in 'extra_head'
3549 if (unlikely(ieee80211_skb_resize(sdata, skb,
3550 max_t(int, extra_head + hw_headroom -
3551 skb_headroom(skb), 0),
3557 memcpy(ð, skb->data, ETH_HLEN - 2);
3558 hdr = skb_push(skb, extra_head);
3559 memcpy(skb->data, fast_tx->hdr, fast_tx->hdr_len);
3560 memcpy(skb->data + fast_tx->da_offs, eth.h_dest, ETH_ALEN);
3561 memcpy(skb->data + fast_tx->sa_offs, eth.h_source, ETH_ALEN);
3563 info = IEEE80211_SKB_CB(skb);
3564 memset(info, 0, sizeof(*info));
3565 info->band = fast_tx->band;
3566 info->control.vif = &sdata->vif;
3567 info->flags = IEEE80211_TX_CTL_FIRST_FRAGMENT |
3568 IEEE80211_TX_CTL_DONTFRAG |
3569 (tid_tx ? IEEE80211_TX_CTL_AMPDU : 0);
3570 info->control.flags = IEEE80211_TX_CTRL_FAST_XMIT;
3572 #ifdef CONFIG_MAC80211_DEBUGFS
3573 if (local->force_tx_status)
3574 info->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS;
3577 if (hdr->frame_control & cpu_to_le16(IEEE80211_STYPE_QOS_DATA)) {
3578 tid = skb->priority & IEEE80211_QOS_CTL_TAG1D_MASK;
3579 *ieee80211_get_qos_ctl(hdr) = tid;
3582 __skb_queue_head_init(&tx.skbs);
3584 tx.flags = IEEE80211_TX_UNICAST;
3588 tx.key = fast_tx->key;
3590 if (ieee80211_queue_skb(local, sdata, sta, skb))
3594 r = ieee80211_xmit_fast_finish(sdata, sta, fast_tx->pn_offs,
3602 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
3603 sdata = container_of(sdata->bss,
3604 struct ieee80211_sub_if_data, u.ap);
3606 __skb_queue_tail(&tx.skbs, skb);
3607 ieee80211_tx_frags(local, &sdata->vif, sta, &tx.skbs, false);
3611 struct sk_buff *ieee80211_tx_dequeue(struct ieee80211_hw *hw,
3612 struct ieee80211_txq *txq)
3614 struct ieee80211_local *local = hw_to_local(hw);
3615 struct txq_info *txqi = container_of(txq, struct txq_info, txq);
3616 struct ieee80211_hdr *hdr;
3617 struct sk_buff *skb = NULL;
3618 struct fq *fq = &local->fq;
3619 struct fq_tin *tin = &txqi->tin;
3620 struct ieee80211_tx_info *info;
3621 struct ieee80211_tx_data tx;
3622 ieee80211_tx_result r;
3623 struct ieee80211_vif *vif = txq->vif;
3625 WARN_ON_ONCE(softirq_count() == 0);
3627 if (!ieee80211_txq_airtime_check(hw, txq))
3631 spin_lock_bh(&fq->lock);
3633 if (test_bit(IEEE80211_TXQ_STOP, &txqi->flags) ||
3634 test_bit(IEEE80211_TXQ_STOP_NETIF_TX, &txqi->flags))
3637 if (vif->txqs_stopped[txq->ac]) {
3638 set_bit(IEEE80211_TXQ_STOP_NETIF_TX, &txqi->flags);
3642 /* Make sure fragments stay together. */
3643 skb = __skb_dequeue(&txqi->frags);
3644 if (unlikely(skb)) {
3645 if (!(IEEE80211_SKB_CB(skb)->control.flags &
3646 IEEE80211_TX_INTCFL_NEED_TXPROCESSING))
3648 IEEE80211_SKB_CB(skb)->control.flags &=
3649 ~IEEE80211_TX_INTCFL_NEED_TXPROCESSING;
3651 skb = fq_tin_dequeue(fq, tin, fq_tin_dequeue_func);
3657 spin_unlock_bh(&fq->lock);
3659 hdr = (struct ieee80211_hdr *)skb->data;
3660 info = IEEE80211_SKB_CB(skb);
3662 memset(&tx, 0, sizeof(tx));
3663 __skb_queue_head_init(&tx.skbs);
3666 tx.sdata = vif_to_sdata(info->control.vif);
3669 tx.sta = container_of(txq->sta, struct sta_info, sta);
3671 * Drop unicast frames to unauthorised stations unless they are
3672 * injected frames or EAPOL frames from the local station.
3674 if (unlikely(!(info->flags & IEEE80211_TX_CTL_INJECTED) &&
3675 ieee80211_is_data(hdr->frame_control) &&
3676 !ieee80211_vif_is_mesh(&tx.sdata->vif) &&
3677 tx.sdata->vif.type != NL80211_IFTYPE_OCB &&
3678 !is_multicast_ether_addr(hdr->addr1) &&
3679 !test_sta_flag(tx.sta, WLAN_STA_AUTHORIZED) &&
3680 (!(info->control.flags &
3681 IEEE80211_TX_CTRL_PORT_CTRL_PROTO) ||
3682 !ether_addr_equal(tx.sdata->vif.addr,
3684 I802_DEBUG_INC(local->tx_handlers_drop_unauth_port);
3685 ieee80211_free_txskb(&local->hw, skb);
3691 * The key can be removed while the packet was queued, so need to call
3692 * this here to get the current key.
3694 r = ieee80211_tx_h_select_key(&tx);
3695 if (r != TX_CONTINUE) {
3696 ieee80211_free_txskb(&local->hw, skb);
3700 if (test_bit(IEEE80211_TXQ_AMPDU, &txqi->flags))
3701 info->flags |= IEEE80211_TX_CTL_AMPDU;
3703 info->flags &= ~IEEE80211_TX_CTL_AMPDU;
3705 if (info->flags & IEEE80211_TX_CTL_HW_80211_ENCAP) {
3706 if (!ieee80211_hw_check(&local->hw, HAS_RATE_CONTROL)) {
3707 r = ieee80211_tx_h_rate_ctrl(&tx);
3708 if (r != TX_CONTINUE) {
3709 ieee80211_free_txskb(&local->hw, skb);
3716 if (info->control.flags & IEEE80211_TX_CTRL_FAST_XMIT) {
3717 struct sta_info *sta = container_of(txq->sta, struct sta_info,
3722 (tx.key->conf.flags & IEEE80211_KEY_FLAG_GENERATE_IV))
3723 pn_offs = ieee80211_hdrlen(hdr->frame_control);
3725 r = ieee80211_xmit_fast_finish(sta->sdata, sta, pn_offs,
3727 if (r != TX_CONTINUE) {
3728 ieee80211_free_txskb(&local->hw, skb);
3732 if (invoke_tx_handlers_late(&tx))
3735 skb = __skb_dequeue(&tx.skbs);
3737 if (!skb_queue_empty(&tx.skbs)) {
3738 spin_lock_bh(&fq->lock);
3739 skb_queue_splice_tail(&tx.skbs, &txqi->frags);
3740 spin_unlock_bh(&fq->lock);
3744 if (skb_has_frag_list(skb) &&
3745 !ieee80211_hw_check(&local->hw, TX_FRAG_LIST)) {
3746 if (skb_linearize(skb)) {
3747 ieee80211_free_txskb(&local->hw, skb);
3752 switch (tx.sdata->vif.type) {
3753 case NL80211_IFTYPE_MONITOR:
3754 if (tx.sdata->u.mntr.flags & MONITOR_FLAG_ACTIVE) {
3755 vif = &tx.sdata->vif;
3758 tx.sdata = rcu_dereference(local->monitor_sdata);
3760 vif = &tx.sdata->vif;
3762 vif->hw_queue[skb_get_queue_mapping(skb)];
3763 } else if (ieee80211_hw_check(&local->hw, QUEUE_CONTROL)) {
3764 ieee80211_free_txskb(&local->hw, skb);
3770 case NL80211_IFTYPE_AP_VLAN:
3771 tx.sdata = container_of(tx.sdata->bss,
3772 struct ieee80211_sub_if_data, u.ap);
3775 vif = &tx.sdata->vif;
3780 IEEE80211_SKB_CB(skb)->control.vif = vif;
3783 wiphy_ext_feature_isset(local->hw.wiphy, NL80211_EXT_FEATURE_AQL)) {
3784 bool ampdu = txq->ac != IEEE80211_AC_VO;
3787 airtime = ieee80211_calc_expected_tx_airtime(hw, vif, txq->sta,
3790 airtime = ieee80211_info_set_tx_time_est(info, airtime);
3791 ieee80211_sta_update_pending_airtime(local, tx.sta,
3801 spin_unlock_bh(&fq->lock);
3805 EXPORT_SYMBOL(ieee80211_tx_dequeue);
3807 struct ieee80211_txq *ieee80211_next_txq(struct ieee80211_hw *hw, u8 ac)
3809 struct ieee80211_local *local = hw_to_local(hw);
3810 struct airtime_sched_info *air_sched;
3811 u64 now = ktime_get_coarse_boottime_ns();
3812 struct ieee80211_txq *ret = NULL;
3813 struct airtime_info *air_info;
3814 struct txq_info *txqi = NULL;
3815 struct rb_node *node;
3818 air_sched = &local->airtime[ac];
3819 spin_lock_bh(&air_sched->lock);
3821 node = air_sched->schedule_pos;
3825 node = rb_first_cached(&air_sched->active_txqs);
3828 node = rb_next(node);
3834 txqi = container_of(node, struct txq_info, schedule_order);
3835 air_info = to_airtime_info(&txqi->txq);
3837 if (air_info->v_t > air_sched->v_t &&
3838 (!first || !airtime_catchup_v_t(air_sched, air_info->v_t, now)))
3841 if (!ieee80211_txq_airtime_check(hw, &txqi->txq)) {
3846 air_sched->schedule_pos = node;
3847 air_sched->last_schedule_activity = now;
3850 spin_unlock_bh(&air_sched->lock);
3853 EXPORT_SYMBOL(ieee80211_next_txq);
3855 static void __ieee80211_insert_txq(struct rb_root_cached *root,
3856 struct txq_info *txqi)
3858 struct rb_node **new = &root->rb_root.rb_node;
3859 struct airtime_info *old_air, *new_air;
3860 struct rb_node *parent = NULL;
3861 struct txq_info *__txqi;
3862 bool leftmost = true;
3866 __txqi = rb_entry(parent, struct txq_info, schedule_order);
3867 old_air = to_airtime_info(&__txqi->txq);
3868 new_air = to_airtime_info(&txqi->txq);
3870 if (new_air->v_t <= old_air->v_t) {
3871 new = &parent->rb_left;
3873 new = &parent->rb_right;
3878 rb_link_node(&txqi->schedule_order, parent, new);
3879 rb_insert_color_cached(&txqi->schedule_order, root, leftmost);
3882 void ieee80211_resort_txq(struct ieee80211_hw *hw,
3883 struct ieee80211_txq *txq)
3885 struct airtime_info *air_info = to_airtime_info(txq);
3886 struct ieee80211_local *local = hw_to_local(hw);
3887 struct txq_info *txqi = to_txq_info(txq);
3888 struct airtime_sched_info *air_sched;
3890 air_sched = &local->airtime[txq->ac];
3892 lockdep_assert_held(&air_sched->lock);
3894 if (!RB_EMPTY_NODE(&txqi->schedule_order)) {
3895 struct airtime_info *a_prev = NULL, *a_next = NULL;
3896 struct txq_info *t_prev, *t_next;
3897 struct rb_node *n_prev, *n_next;
3899 /* Erasing a node can cause an expensive rebalancing operation,
3900 * so we check the previous and next nodes first and only remove
3901 * and re-insert if the current node is not already in the
3904 if ((n_prev = rb_prev(&txqi->schedule_order)) != NULL) {
3905 t_prev = container_of(n_prev, struct txq_info,
3907 a_prev = to_airtime_info(&t_prev->txq);
3910 if ((n_next = rb_next(&txqi->schedule_order)) != NULL) {
3911 t_next = container_of(n_next, struct txq_info,
3913 a_next = to_airtime_info(&t_next->txq);
3916 if ((!a_prev || a_prev->v_t <= air_info->v_t) &&
3917 (!a_next || a_next->v_t > air_info->v_t))
3920 if (air_sched->schedule_pos == &txqi->schedule_order)
3921 air_sched->schedule_pos = n_prev;
3923 rb_erase_cached(&txqi->schedule_order,
3924 &air_sched->active_txqs);
3925 RB_CLEAR_NODE(&txqi->schedule_order);
3926 __ieee80211_insert_txq(&air_sched->active_txqs, txqi);
3930 void ieee80211_update_airtime_weight(struct ieee80211_local *local,
3931 struct airtime_sched_info *air_sched,
3932 u64 now, bool force)
3934 struct airtime_info *air_info, *tmp;
3938 now = ktime_get_coarse_boottime_ns();
3940 lockdep_assert_held(&air_sched->lock);
3942 if (!force && (air_sched->last_weight_update <
3943 now - AIRTIME_ACTIVE_DURATION))
3946 list_for_each_entry_safe(air_info, tmp,
3947 &air_sched->active_list, list) {
3948 if (airtime_is_active(air_info, now))
3949 weight_sum += air_info->weight;
3951 list_del_init(&air_info->list);
3953 airtime_weight_sum_set(air_sched, weight_sum);
3954 air_sched->last_weight_update = now;
3957 void ieee80211_schedule_txq(struct ieee80211_hw *hw,
3958 struct ieee80211_txq *txq)
3959 __acquires(txq_lock) __releases(txq_lock)
3961 struct ieee80211_local *local = hw_to_local(hw);
3962 struct txq_info *txqi = to_txq_info(txq);
3963 struct airtime_sched_info *air_sched;
3964 u64 now = ktime_get_coarse_boottime_ns();
3965 struct airtime_info *air_info;
3969 air_sched = &local->airtime[ac];
3970 air_info = to_airtime_info(txq);
3972 spin_lock_bh(&air_sched->lock);
3973 was_active = airtime_is_active(air_info, now);
3974 airtime_set_active(air_sched, air_info, now);
3976 if (!RB_EMPTY_NODE(&txqi->schedule_order))
3979 /* If the station has been inactive for a while, catch up its v_t so it
3980 * doesn't get indefinite priority; see comment above the definition of
3981 * AIRTIME_MAX_BEHIND.
3983 if ((!was_active && air_info->v_t < air_sched->v_t) ||
3984 air_info->v_t < air_sched->v_t - AIRTIME_MAX_BEHIND)
3985 air_info->v_t = air_sched->v_t;
3987 ieee80211_update_airtime_weight(local, air_sched, now, !was_active);
3988 __ieee80211_insert_txq(&air_sched->active_txqs, txqi);
3991 spin_unlock_bh(&air_sched->lock);
3993 EXPORT_SYMBOL(ieee80211_schedule_txq);
3995 static void __ieee80211_unschedule_txq(struct ieee80211_hw *hw,
3996 struct ieee80211_txq *txq,
3999 struct ieee80211_local *local = hw_to_local(hw);
4000 struct txq_info *txqi = to_txq_info(txq);
4001 struct airtime_sched_info *air_sched;
4002 struct airtime_info *air_info;
4004 air_sched = &local->airtime[txq->ac];
4005 air_info = to_airtime_info(&txqi->txq);
4007 lockdep_assert_held(&air_sched->lock);
4010 list_del_init(&air_info->list);
4011 ieee80211_update_airtime_weight(local, air_sched, 0, true);
4014 if (RB_EMPTY_NODE(&txqi->schedule_order))
4017 if (air_sched->schedule_pos == &txqi->schedule_order)
4018 air_sched->schedule_pos = rb_prev(&txqi->schedule_order);
4021 airtime_set_active(air_sched, air_info,
4022 ktime_get_coarse_boottime_ns());
4024 rb_erase_cached(&txqi->schedule_order,
4025 &air_sched->active_txqs);
4026 RB_CLEAR_NODE(&txqi->schedule_order);
4029 void ieee80211_unschedule_txq(struct ieee80211_hw *hw,
4030 struct ieee80211_txq *txq,
4032 __acquires(txq_lock) __releases(txq_lock)
4034 struct ieee80211_local *local = hw_to_local(hw);
4036 spin_lock_bh(&local->airtime[txq->ac].lock);
4037 __ieee80211_unschedule_txq(hw, txq, purge);
4038 spin_unlock_bh(&local->airtime[txq->ac].lock);
4041 void ieee80211_return_txq(struct ieee80211_hw *hw,
4042 struct ieee80211_txq *txq, bool force)
4044 struct ieee80211_local *local = hw_to_local(hw);
4045 struct txq_info *txqi = to_txq_info(txq);
4047 spin_lock_bh(&local->airtime[txq->ac].lock);
4049 if (!RB_EMPTY_NODE(&txqi->schedule_order) && !force &&
4050 !txq_has_queue(txq))
4051 __ieee80211_unschedule_txq(hw, txq, false);
4053 spin_unlock_bh(&local->airtime[txq->ac].lock);
4055 EXPORT_SYMBOL(ieee80211_return_txq);
4057 DEFINE_STATIC_KEY_FALSE(aql_disable);
4059 bool ieee80211_txq_airtime_check(struct ieee80211_hw *hw,
4060 struct ieee80211_txq *txq)
4062 struct airtime_info *air_info = to_airtime_info(txq);
4063 struct ieee80211_local *local = hw_to_local(hw);
4065 if (!wiphy_ext_feature_isset(local->hw.wiphy, NL80211_EXT_FEATURE_AQL))
4068 if (static_branch_unlikely(&aql_disable))
4074 if (unlikely(txq->tid == IEEE80211_NUM_TIDS))
4077 if (atomic_read(&air_info->aql_tx_pending) < air_info->aql_limit_low)
4080 if (atomic_read(&local->aql_total_pending_airtime) <
4081 local->aql_threshold &&
4082 atomic_read(&air_info->aql_tx_pending) < air_info->aql_limit_high)
4087 EXPORT_SYMBOL(ieee80211_txq_airtime_check);
4089 bool ieee80211_txq_may_transmit(struct ieee80211_hw *hw,
4090 struct ieee80211_txq *txq)
4092 struct txq_info *first_txqi = NULL, *txqi = to_txq_info(txq);
4093 struct ieee80211_local *local = hw_to_local(hw);
4094 struct airtime_sched_info *air_sched;
4095 struct airtime_info *air_info;
4096 struct rb_node *node = NULL;
4101 if (!ieee80211_txq_airtime_check(hw, txq))
4104 air_sched = &local->airtime[txq->ac];
4105 spin_lock_bh(&air_sched->lock);
4107 if (RB_EMPTY_NODE(&txqi->schedule_order))
4110 now = ktime_get_coarse_boottime_ns();
4112 /* Like in ieee80211_next_txq(), make sure the first station in the
4113 * scheduling order is eligible for transmission to avoid starvation.
4115 node = rb_first_cached(&air_sched->active_txqs);
4117 first_txqi = container_of(node, struct txq_info,
4119 air_info = to_airtime_info(&first_txqi->txq);
4121 if (air_sched->v_t < air_info->v_t)
4122 airtime_catchup_v_t(air_sched, air_info->v_t, now);
4125 air_info = to_airtime_info(&txqi->txq);
4126 if (air_info->v_t <= air_sched->v_t) {
4127 air_sched->last_schedule_activity = now;
4132 spin_unlock_bh(&air_sched->lock);
4135 EXPORT_SYMBOL(ieee80211_txq_may_transmit);
4137 void ieee80211_txq_schedule_start(struct ieee80211_hw *hw, u8 ac)
4139 struct ieee80211_local *local = hw_to_local(hw);
4140 struct airtime_sched_info *air_sched = &local->airtime[ac];
4142 spin_lock_bh(&air_sched->lock);
4143 air_sched->schedule_pos = NULL;
4144 spin_unlock_bh(&air_sched->lock);
4146 EXPORT_SYMBOL(ieee80211_txq_schedule_start);
4148 void __ieee80211_subif_start_xmit(struct sk_buff *skb,
4149 struct net_device *dev,
4154 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
4155 struct ieee80211_local *local = sdata->local;
4156 struct sta_info *sta;
4157 struct sk_buff *next;
4160 if (unlikely(skb->len < ETH_HLEN)) {
4167 if (ieee80211_lookup_ra_sta(sdata, skb, &sta))
4173 if (local->ops->wake_tx_queue) {
4174 u16 queue = __ieee80211_select_queue(sdata, sta, skb);
4175 skb_set_queue_mapping(skb, queue);
4179 ieee80211_aggr_check(sdata, sta, skb);
4181 sk_pacing_shift_update(skb->sk, sdata->local->hw.tx_sk_pacing_shift);
4184 struct ieee80211_fast_tx *fast_tx;
4186 fast_tx = rcu_dereference(sta->fast_tx);
4189 ieee80211_xmit_fast(sdata, sta, fast_tx, skb))
4193 if (skb_is_gso(skb)) {
4194 struct sk_buff *segs;
4196 segs = skb_gso_segment(skb, 0);
4204 /* we cannot process non-linear frames on this path */
4205 if (skb_linearize(skb))
4208 /* the frame could be fragmented, software-encrypted, and other
4209 * things so we cannot really handle checksum offload with it -
4210 * fix it up in software before we handle anything else.
4212 if (skb->ip_summed == CHECKSUM_PARTIAL) {
4213 skb_set_transport_header(skb,
4214 skb_checksum_start_offset(skb));
4215 if (skb_checksum_help(skb))
4220 skb_list_walk_safe(skb, skb, next) {
4221 skb_mark_not_on_list(skb);
4223 if (skb->protocol == sdata->control_port_protocol)
4224 ctrl_flags |= IEEE80211_TX_CTRL_SKIP_MPATH_LOOKUP;
4226 skb = ieee80211_build_hdr(sdata, skb, info_flags,
4227 sta, ctrl_flags, cookie);
4229 kfree_skb_list(next);
4233 dev_sw_netstats_tx_add(dev, 1, skb->len);
4235 ieee80211_xmit(sdata, sta, skb);
4243 ieee80211_tpt_led_trig_tx(local, len);
4247 static int ieee80211_change_da(struct sk_buff *skb, struct sta_info *sta)
4252 err = skb_ensure_writable(skb, ETH_HLEN);
4256 eth = (void *)skb->data;
4257 ether_addr_copy(eth->h_dest, sta->sta.addr);
4262 static bool ieee80211_multicast_to_unicast(struct sk_buff *skb,
4263 struct net_device *dev)
4265 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
4266 const struct ethhdr *eth = (void *)skb->data;
4267 const struct vlan_ethhdr *ethvlan = (void *)skb->data;
4270 if (likely(!is_multicast_ether_addr(eth->h_dest)))
4273 switch (sdata->vif.type) {
4274 case NL80211_IFTYPE_AP_VLAN:
4275 if (sdata->u.vlan.sta)
4277 if (sdata->wdev.use_4addr)
4280 case NL80211_IFTYPE_AP:
4281 /* check runtime toggle for this bss */
4282 if (!sdata->bss->multicast_to_unicast)
4289 /* multicast to unicast conversion only for some payload */
4290 ethertype = eth->h_proto;
4291 if (ethertype == htons(ETH_P_8021Q) && skb->len >= VLAN_ETH_HLEN)
4292 ethertype = ethvlan->h_vlan_encapsulated_proto;
4293 switch (ethertype) {
4294 case htons(ETH_P_ARP):
4295 case htons(ETH_P_IP):
4296 case htons(ETH_P_IPV6):
4306 ieee80211_convert_to_unicast(struct sk_buff *skb, struct net_device *dev,
4307 struct sk_buff_head *queue)
4309 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
4310 struct ieee80211_local *local = sdata->local;
4311 const struct ethhdr *eth = (struct ethhdr *)skb->data;
4312 struct sta_info *sta, *first = NULL;
4313 struct sk_buff *cloned_skb;
4317 list_for_each_entry_rcu(sta, &local->sta_list, list) {
4318 if (sdata != sta->sdata)
4319 /* AP-VLAN mismatch */
4321 if (unlikely(ether_addr_equal(eth->h_source, sta->sta.addr)))
4322 /* do not send back to source */
4328 cloned_skb = skb_clone(skb, GFP_ATOMIC);
4331 if (unlikely(ieee80211_change_da(cloned_skb, sta))) {
4332 dev_kfree_skb(cloned_skb);
4335 __skb_queue_tail(queue, cloned_skb);
4338 if (likely(first)) {
4339 if (unlikely(ieee80211_change_da(skb, first)))
4341 __skb_queue_tail(queue, skb);
4343 /* no STA connected, drop */
4350 __skb_queue_purge(queue);
4351 __skb_queue_tail(queue, skb);
4357 * ieee80211_subif_start_xmit - netif start_xmit function for 802.3 vifs
4358 * @skb: packet to be sent
4359 * @dev: incoming interface
4361 * On failure skb will be freed.
4363 netdev_tx_t ieee80211_subif_start_xmit(struct sk_buff *skb,
4364 struct net_device *dev)
4366 if (unlikely(ieee80211_multicast_to_unicast(skb, dev))) {
4367 struct sk_buff_head queue;
4369 __skb_queue_head_init(&queue);
4370 ieee80211_convert_to_unicast(skb, dev, &queue);
4371 while ((skb = __skb_dequeue(&queue)))
4372 __ieee80211_subif_start_xmit(skb, dev, 0, 0, NULL);
4374 __ieee80211_subif_start_xmit(skb, dev, 0, 0, NULL);
4377 return NETDEV_TX_OK;
4380 static bool ieee80211_tx_8023(struct ieee80211_sub_if_data *sdata,
4381 struct sk_buff *skb, struct sta_info *sta,
4384 struct ieee80211_local *local = sdata->local;
4385 struct ieee80211_tx_control control = {};
4386 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
4387 struct ieee80211_sta *pubsta = NULL;
4388 unsigned long flags;
4389 int q = info->hw_queue;
4392 sk_pacing_shift_update(skb->sk, local->hw.tx_sk_pacing_shift);
4394 ieee80211_tpt_led_trig_tx(local, skb->len);
4396 if (ieee80211_queue_skb(local, sdata, sta, skb))
4399 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
4401 if (local->queue_stop_reasons[q] ||
4402 (!txpending && !skb_queue_empty(&local->pending[q]))) {
4404 skb_queue_head(&local->pending[q], skb);
4406 skb_queue_tail(&local->pending[q], skb);
4408 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
4413 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
4415 if (sta && sta->uploaded)
4418 control.sta = pubsta;
4420 drv_tx(local, &control, skb);
4425 static void ieee80211_8023_xmit(struct ieee80211_sub_if_data *sdata,
4426 struct net_device *dev, struct sta_info *sta,
4427 struct ieee80211_key *key, struct sk_buff *skb)
4429 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
4430 struct ieee80211_local *local = sdata->local;
4431 struct tid_ampdu_tx *tid_tx;
4434 if (local->ops->wake_tx_queue) {
4435 u16 queue = __ieee80211_select_queue(sdata, sta, skb);
4436 skb_set_queue_mapping(skb, queue);
4440 if (unlikely(test_bit(SCAN_SW_SCANNING, &local->scanning)) &&
4441 test_bit(SDATA_STATE_OFFCHANNEL, &sdata->state))
4444 memset(info, 0, sizeof(*info));
4446 ieee80211_aggr_check(sdata, sta, skb);
4448 tid = skb->priority & IEEE80211_QOS_CTL_TAG1D_MASK;
4449 tid_tx = rcu_dereference(sta->ampdu_mlme.tid_tx[tid]);
4451 if (!test_bit(HT_AGG_STATE_OPERATIONAL, &tid_tx->state)) {
4452 /* fall back to non-offload slow path */
4453 __ieee80211_subif_start_xmit(skb, dev, 0, 0, NULL);
4457 info->flags |= IEEE80211_TX_CTL_AMPDU;
4458 if (tid_tx->timeout)
4459 tid_tx->last_tx = jiffies;
4462 if (unlikely(skb->sk &&
4463 skb_shinfo(skb)->tx_flags & SKBTX_WIFI_STATUS))
4464 info->ack_frame_id = ieee80211_store_ack_skb(local, skb,
4465 &info->flags, NULL);
4467 info->hw_queue = sdata->vif.hw_queue[skb_get_queue_mapping(skb)];
4469 dev_sw_netstats_tx_add(dev, 1, skb->len);
4471 sta->deflink.tx_stats.bytes[skb_get_queue_mapping(skb)] += skb->len;
4472 sta->deflink.tx_stats.packets[skb_get_queue_mapping(skb)]++;
4474 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
4475 sdata = container_of(sdata->bss,
4476 struct ieee80211_sub_if_data, u.ap);
4478 info->flags |= IEEE80211_TX_CTL_HW_80211_ENCAP;
4479 info->control.vif = &sdata->vif;
4482 info->control.hw_key = &key->conf;
4484 ieee80211_tx_8023(sdata, skb, sta, false);
4492 netdev_tx_t ieee80211_subif_start_xmit_8023(struct sk_buff *skb,
4493 struct net_device *dev)
4495 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
4496 struct ethhdr *ehdr = (struct ethhdr *)skb->data;
4497 struct ieee80211_key *key;
4498 struct sta_info *sta;
4500 if (unlikely(skb->len < ETH_HLEN)) {
4502 return NETDEV_TX_OK;
4507 if (ieee80211_lookup_ra_sta(sdata, skb, &sta)) {
4512 if (unlikely(IS_ERR_OR_NULL(sta) || !sta->uploaded ||
4513 !test_sta_flag(sta, WLAN_STA_AUTHORIZED) ||
4514 sdata->control_port_protocol == ehdr->h_proto))
4517 key = rcu_dereference(sta->ptk[sta->ptk_idx]);
4519 key = rcu_dereference(sdata->default_unicast_key);
4521 if (key && (!(key->flags & KEY_FLAG_UPLOADED_TO_HARDWARE) ||
4522 key->conf.cipher == WLAN_CIPHER_SUITE_TKIP))
4525 ieee80211_8023_xmit(sdata, dev, sta, key, skb);
4529 ieee80211_subif_start_xmit(skb, dev);
4533 return NETDEV_TX_OK;
4537 ieee80211_build_data_template(struct ieee80211_sub_if_data *sdata,
4538 struct sk_buff *skb, u32 info_flags)
4540 struct ieee80211_hdr *hdr;
4541 struct ieee80211_tx_data tx = {
4542 .local = sdata->local,
4545 struct sta_info *sta;
4549 if (ieee80211_lookup_ra_sta(sdata, skb, &sta)) {
4551 skb = ERR_PTR(-EINVAL);
4555 skb = ieee80211_build_hdr(sdata, skb, info_flags, sta, 0, NULL);
4559 hdr = (void *)skb->data;
4560 tx.sta = sta_info_get(sdata, hdr->addr1);
4563 if (ieee80211_tx_h_select_key(&tx) != TX_CONTINUE) {
4566 return ERR_PTR(-EINVAL);
4575 * ieee80211_clear_tx_pending may not be called in a context where
4576 * it is possible that it packets could come in again.
4578 void ieee80211_clear_tx_pending(struct ieee80211_local *local)
4580 struct sk_buff *skb;
4583 for (i = 0; i < local->hw.queues; i++) {
4584 while ((skb = skb_dequeue(&local->pending[i])) != NULL)
4585 ieee80211_free_txskb(&local->hw, skb);
4590 * Returns false if the frame couldn't be transmitted but was queued instead,
4591 * which in this case means re-queued -- take as an indication to stop sending
4592 * more pending frames.
4594 static bool ieee80211_tx_pending_skb(struct ieee80211_local *local,
4595 struct sk_buff *skb)
4597 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
4598 struct ieee80211_sub_if_data *sdata;
4599 struct sta_info *sta;
4600 struct ieee80211_hdr *hdr;
4602 struct ieee80211_chanctx_conf *chanctx_conf;
4604 sdata = vif_to_sdata(info->control.vif);
4606 if (info->control.flags & IEEE80211_TX_INTCFL_NEED_TXPROCESSING) {
4607 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
4608 if (unlikely(!chanctx_conf)) {
4612 info->band = chanctx_conf->def.chan->band;
4613 result = ieee80211_tx(sdata, NULL, skb, true);
4614 } else if (info->flags & IEEE80211_TX_CTL_HW_80211_ENCAP) {
4615 if (ieee80211_lookup_ra_sta(sdata, skb, &sta)) {
4620 if (IS_ERR(sta) || (sta && !sta->uploaded))
4623 result = ieee80211_tx_8023(sdata, skb, sta, true);
4625 struct sk_buff_head skbs;
4627 __skb_queue_head_init(&skbs);
4628 __skb_queue_tail(&skbs, skb);
4630 hdr = (struct ieee80211_hdr *)skb->data;
4631 sta = sta_info_get(sdata, hdr->addr1);
4633 result = __ieee80211_tx(local, &skbs, sta, true);
4640 * Transmit all pending packets. Called from tasklet.
4642 void ieee80211_tx_pending(struct tasklet_struct *t)
4644 struct ieee80211_local *local = from_tasklet(local, t,
4645 tx_pending_tasklet);
4646 unsigned long flags;
4652 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
4653 for (i = 0; i < local->hw.queues; i++) {
4655 * If queue is stopped by something other than due to pending
4656 * frames, or we have no pending frames, proceed to next queue.
4658 if (local->queue_stop_reasons[i] ||
4659 skb_queue_empty(&local->pending[i]))
4662 while (!skb_queue_empty(&local->pending[i])) {
4663 struct sk_buff *skb = __skb_dequeue(&local->pending[i]);
4664 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
4666 if (WARN_ON(!info->control.vif)) {
4667 ieee80211_free_txskb(&local->hw, skb);
4671 spin_unlock_irqrestore(&local->queue_stop_reason_lock,
4674 txok = ieee80211_tx_pending_skb(local, skb);
4675 spin_lock_irqsave(&local->queue_stop_reason_lock,
4681 if (skb_queue_empty(&local->pending[i]))
4682 ieee80211_propagate_queue_wake(local, i);
4684 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
4689 /* functions for drivers to get certain frames */
4691 static void __ieee80211_beacon_add_tim(struct ieee80211_sub_if_data *sdata,
4692 struct ps_data *ps, struct sk_buff *skb,
4697 int i, have_bits = 0, n1, n2;
4699 /* Generate bitmap for TIM only if there are any STAs in power save
4701 if (atomic_read(&ps->num_sta_ps) > 0)
4702 /* in the hope that this is faster than
4703 * checking byte-for-byte */
4704 have_bits = !bitmap_empty((unsigned long *)ps->tim,
4705 IEEE80211_MAX_AID+1);
4707 if (ps->dtim_count == 0)
4708 ps->dtim_count = sdata->vif.bss_conf.dtim_period - 1;
4713 tim = pos = skb_put(skb, 6);
4714 *pos++ = WLAN_EID_TIM;
4716 *pos++ = ps->dtim_count;
4717 *pos++ = sdata->vif.bss_conf.dtim_period;
4719 if (ps->dtim_count == 0 && !skb_queue_empty(&ps->bc_buf))
4722 ps->dtim_bc_mc = aid0 == 1;
4725 /* Find largest even number N1 so that bits numbered 1 through
4726 * (N1 x 8) - 1 in the bitmap are 0 and number N2 so that bits
4727 * (N2 + 1) x 8 through 2007 are 0. */
4729 for (i = 0; i < IEEE80211_MAX_TIM_LEN; i++) {
4736 for (i = IEEE80211_MAX_TIM_LEN - 1; i >= n1; i--) {
4743 /* Bitmap control */
4745 /* Part Virt Bitmap */
4746 skb_put(skb, n2 - n1);
4747 memcpy(pos, ps->tim + n1, n2 - n1 + 1);
4749 tim[1] = n2 - n1 + 4;
4751 *pos++ = aid0; /* Bitmap control */
4752 *pos++ = 0; /* Part Virt Bitmap */
4756 static int ieee80211_beacon_add_tim(struct ieee80211_sub_if_data *sdata,
4757 struct ps_data *ps, struct sk_buff *skb,
4760 struct ieee80211_local *local = sdata->local;
4763 * Not very nice, but we want to allow the driver to call
4764 * ieee80211_beacon_get() as a response to the set_tim()
4765 * callback. That, however, is already invoked under the
4766 * sta_lock to guarantee consistent and race-free update
4767 * of the tim bitmap in mac80211 and the driver.
4769 if (local->tim_in_locked_section) {
4770 __ieee80211_beacon_add_tim(sdata, ps, skb, is_template);
4772 spin_lock_bh(&local->tim_lock);
4773 __ieee80211_beacon_add_tim(sdata, ps, skb, is_template);
4774 spin_unlock_bh(&local->tim_lock);
4780 static void ieee80211_set_beacon_cntdwn(struct ieee80211_sub_if_data *sdata,
4781 struct beacon_data *beacon)
4783 u8 *beacon_data, count, max_count = 1;
4784 struct probe_resp *resp;
4785 size_t beacon_data_len;
4789 switch (sdata->vif.type) {
4790 case NL80211_IFTYPE_AP:
4791 beacon_data = beacon->tail;
4792 beacon_data_len = beacon->tail_len;
4794 case NL80211_IFTYPE_ADHOC:
4795 beacon_data = beacon->head;
4796 beacon_data_len = beacon->head_len;
4798 case NL80211_IFTYPE_MESH_POINT:
4799 beacon_data = beacon->head;
4800 beacon_data_len = beacon->head_len;
4807 resp = rcu_dereference(sdata->u.ap.probe_resp);
4809 bcn_offsets = beacon->cntdwn_counter_offsets;
4810 count = beacon->cntdwn_current_counter;
4811 if (sdata->vif.csa_active)
4812 max_count = IEEE80211_MAX_CNTDWN_COUNTERS_NUM;
4814 for (i = 0; i < max_count; ++i) {
4815 if (bcn_offsets[i]) {
4816 if (WARN_ON_ONCE(bcn_offsets[i] >= beacon_data_len)) {
4820 beacon_data[bcn_offsets[i]] = count;
4823 if (sdata->vif.type == NL80211_IFTYPE_AP && resp) {
4824 u16 *resp_offsets = resp->cntdwn_counter_offsets;
4826 resp->data[resp_offsets[i]] = count;
4832 static u8 __ieee80211_beacon_update_cntdwn(struct beacon_data *beacon)
4834 beacon->cntdwn_current_counter--;
4836 /* the counter should never reach 0 */
4837 WARN_ON_ONCE(!beacon->cntdwn_current_counter);
4839 return beacon->cntdwn_current_counter;
4842 u8 ieee80211_beacon_update_cntdwn(struct ieee80211_vif *vif)
4844 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
4845 struct beacon_data *beacon = NULL;
4850 if (sdata->vif.type == NL80211_IFTYPE_AP)
4851 beacon = rcu_dereference(sdata->u.ap.beacon);
4852 else if (sdata->vif.type == NL80211_IFTYPE_ADHOC)
4853 beacon = rcu_dereference(sdata->u.ibss.presp);
4854 else if (ieee80211_vif_is_mesh(&sdata->vif))
4855 beacon = rcu_dereference(sdata->u.mesh.beacon);
4860 count = __ieee80211_beacon_update_cntdwn(beacon);
4866 EXPORT_SYMBOL(ieee80211_beacon_update_cntdwn);
4868 void ieee80211_beacon_set_cntdwn(struct ieee80211_vif *vif, u8 counter)
4870 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
4871 struct beacon_data *beacon = NULL;
4875 if (sdata->vif.type == NL80211_IFTYPE_AP)
4876 beacon = rcu_dereference(sdata->u.ap.beacon);
4877 else if (sdata->vif.type == NL80211_IFTYPE_ADHOC)
4878 beacon = rcu_dereference(sdata->u.ibss.presp);
4879 else if (ieee80211_vif_is_mesh(&sdata->vif))
4880 beacon = rcu_dereference(sdata->u.mesh.beacon);
4885 if (counter < beacon->cntdwn_current_counter)
4886 beacon->cntdwn_current_counter = counter;
4891 EXPORT_SYMBOL(ieee80211_beacon_set_cntdwn);
4893 bool ieee80211_beacon_cntdwn_is_complete(struct ieee80211_vif *vif)
4895 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
4896 struct beacon_data *beacon = NULL;
4898 size_t beacon_data_len;
4901 if (!ieee80211_sdata_running(sdata))
4905 if (vif->type == NL80211_IFTYPE_AP) {
4906 struct ieee80211_if_ap *ap = &sdata->u.ap;
4908 beacon = rcu_dereference(ap->beacon);
4909 if (WARN_ON(!beacon || !beacon->tail))
4911 beacon_data = beacon->tail;
4912 beacon_data_len = beacon->tail_len;
4913 } else if (vif->type == NL80211_IFTYPE_ADHOC) {
4914 struct ieee80211_if_ibss *ifibss = &sdata->u.ibss;
4916 beacon = rcu_dereference(ifibss->presp);
4920 beacon_data = beacon->head;
4921 beacon_data_len = beacon->head_len;
4922 } else if (vif->type == NL80211_IFTYPE_MESH_POINT) {
4923 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
4925 beacon = rcu_dereference(ifmsh->beacon);
4929 beacon_data = beacon->head;
4930 beacon_data_len = beacon->head_len;
4936 if (!beacon->cntdwn_counter_offsets[0])
4939 if (WARN_ON_ONCE(beacon->cntdwn_counter_offsets[0] > beacon_data_len))
4942 if (beacon_data[beacon->cntdwn_counter_offsets[0]] == 1)
4950 EXPORT_SYMBOL(ieee80211_beacon_cntdwn_is_complete);
4952 static int ieee80211_beacon_protect(struct sk_buff *skb,
4953 struct ieee80211_local *local,
4954 struct ieee80211_sub_if_data *sdata)
4956 ieee80211_tx_result res;
4957 struct ieee80211_tx_data tx;
4958 struct sk_buff *check_skb;
4960 memset(&tx, 0, sizeof(tx));
4961 tx.key = rcu_dereference(sdata->default_beacon_key);
4966 __skb_queue_head_init(&tx.skbs);
4967 __skb_queue_tail(&tx.skbs, skb);
4968 res = ieee80211_tx_h_encrypt(&tx);
4969 check_skb = __skb_dequeue(&tx.skbs);
4970 /* we may crash after this, but it'd be a bug in crypto */
4971 WARN_ON(check_skb != skb);
4972 if (WARN_ON_ONCE(res != TX_CONTINUE))
4979 ieee80211_beacon_get_finish(struct ieee80211_hw *hw,
4980 struct ieee80211_vif *vif,
4981 struct ieee80211_mutable_offsets *offs,
4982 struct beacon_data *beacon,
4983 struct sk_buff *skb,
4984 struct ieee80211_chanctx_conf *chanctx_conf,
4987 struct ieee80211_local *local = hw_to_local(hw);
4988 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
4989 struct ieee80211_tx_info *info;
4990 enum nl80211_band band;
4991 struct ieee80211_tx_rate_control txrc;
4994 if (offs && beacon) {
4997 for (i = 0; i < IEEE80211_MAX_CNTDWN_COUNTERS_NUM; i++) {
4998 u16 csa_off = beacon->cntdwn_counter_offsets[i];
5003 offs->cntdwn_counter_offs[i] = csa_off_base + csa_off;
5007 band = chanctx_conf->def.chan->band;
5008 info = IEEE80211_SKB_CB(skb);
5009 info->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
5010 info->flags |= IEEE80211_TX_CTL_NO_ACK;
5013 memset(&txrc, 0, sizeof(txrc));
5015 txrc.sband = local->hw.wiphy->bands[band];
5016 txrc.bss_conf = &sdata->vif.bss_conf;
5018 txrc.reported_rate.idx = -1;
5019 if (sdata->beacon_rate_set && sdata->beacon_rateidx_mask[band])
5020 txrc.rate_idx_mask = sdata->beacon_rateidx_mask[band];
5022 txrc.rate_idx_mask = sdata->rc_rateidx_mask[band];
5024 rate_control_get_rate(sdata, NULL, &txrc);
5026 info->control.vif = vif;
5027 info->flags |= IEEE80211_TX_CTL_CLEAR_PS_FILT |
5028 IEEE80211_TX_CTL_ASSIGN_SEQ |
5029 IEEE80211_TX_CTL_FIRST_FRAGMENT;
5033 ieee80211_beacon_add_mbssid(struct sk_buff *skb, struct beacon_data *beacon)
5037 if (!beacon->mbssid_ies)
5040 for (i = 0; i < beacon->mbssid_ies->cnt; i++)
5041 skb_put_data(skb, beacon->mbssid_ies->elem[i].data,
5042 beacon->mbssid_ies->elem[i].len);
5045 static struct sk_buff *
5046 ieee80211_beacon_get_ap(struct ieee80211_hw *hw,
5047 struct ieee80211_vif *vif,
5048 struct ieee80211_mutable_offsets *offs,
5050 struct beacon_data *beacon,
5051 struct ieee80211_chanctx_conf *chanctx_conf)
5053 struct ieee80211_local *local = hw_to_local(hw);
5054 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
5055 struct ieee80211_if_ap *ap = &sdata->u.ap;
5056 struct sk_buff *skb = NULL;
5057 u16 csa_off_base = 0;
5060 if (beacon->cntdwn_counter_offsets[0]) {
5062 ieee80211_beacon_update_cntdwn(vif);
5064 ieee80211_set_beacon_cntdwn(sdata, beacon);
5067 /* headroom, head length,
5068 * tail length, maximum TIM length and multiple BSSID length
5070 mbssid_len = ieee80211_get_mbssid_beacon_len(beacon->mbssid_ies);
5071 skb = dev_alloc_skb(local->tx_headroom + beacon->head_len +
5072 beacon->tail_len + 256 +
5073 local->hw.extra_beacon_tailroom + mbssid_len);
5077 skb_reserve(skb, local->tx_headroom);
5078 skb_put_data(skb, beacon->head, beacon->head_len);
5080 ieee80211_beacon_add_tim(sdata, &ap->ps, skb, is_template);
5083 offs->tim_offset = beacon->head_len;
5084 offs->tim_length = skb->len - beacon->head_len;
5085 offs->cntdwn_counter_offs[0] = beacon->cntdwn_counter_offsets[0];
5088 ieee80211_beacon_add_mbssid(skb, beacon);
5089 offs->mbssid_off = skb->len - mbssid_len;
5092 /* for AP the csa offsets are from tail */
5093 csa_off_base = skb->len;
5097 skb_put_data(skb, beacon->tail, beacon->tail_len);
5099 if (ieee80211_beacon_protect(skb, local, sdata) < 0)
5102 ieee80211_beacon_get_finish(hw, vif, offs, beacon, skb, chanctx_conf,
5107 static struct sk_buff *
5108 __ieee80211_beacon_get(struct ieee80211_hw *hw,
5109 struct ieee80211_vif *vif,
5110 struct ieee80211_mutable_offsets *offs,
5113 struct ieee80211_local *local = hw_to_local(hw);
5114 struct beacon_data *beacon = NULL;
5115 struct sk_buff *skb = NULL;
5116 struct ieee80211_sub_if_data *sdata = NULL;
5117 struct ieee80211_chanctx_conf *chanctx_conf;
5121 sdata = vif_to_sdata(vif);
5122 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
5124 if (!ieee80211_sdata_running(sdata) || !chanctx_conf)
5128 memset(offs, 0, sizeof(*offs));
5130 if (sdata->vif.type == NL80211_IFTYPE_AP) {
5131 struct ieee80211_if_ap *ap = &sdata->u.ap;
5133 beacon = rcu_dereference(ap->beacon);
5137 skb = ieee80211_beacon_get_ap(hw, vif, offs, is_template,
5138 beacon, chanctx_conf);
5139 } else if (sdata->vif.type == NL80211_IFTYPE_ADHOC) {
5140 struct ieee80211_if_ibss *ifibss = &sdata->u.ibss;
5141 struct ieee80211_hdr *hdr;
5143 beacon = rcu_dereference(ifibss->presp);
5147 if (beacon->cntdwn_counter_offsets[0]) {
5149 __ieee80211_beacon_update_cntdwn(beacon);
5151 ieee80211_set_beacon_cntdwn(sdata, beacon);
5154 skb = dev_alloc_skb(local->tx_headroom + beacon->head_len +
5155 local->hw.extra_beacon_tailroom);
5158 skb_reserve(skb, local->tx_headroom);
5159 skb_put_data(skb, beacon->head, beacon->head_len);
5161 hdr = (struct ieee80211_hdr *) skb->data;
5162 hdr->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
5163 IEEE80211_STYPE_BEACON);
5165 ieee80211_beacon_get_finish(hw, vif, offs, beacon, skb,
5167 } else if (ieee80211_vif_is_mesh(&sdata->vif)) {
5168 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
5170 beacon = rcu_dereference(ifmsh->beacon);
5174 if (beacon->cntdwn_counter_offsets[0]) {
5176 /* TODO: For mesh csa_counter is in TU, so
5177 * decrementing it by one isn't correct, but
5178 * for now we leave it consistent with overall
5179 * mac80211's behavior.
5181 __ieee80211_beacon_update_cntdwn(beacon);
5183 ieee80211_set_beacon_cntdwn(sdata, beacon);
5186 if (ifmsh->sync_ops)
5187 ifmsh->sync_ops->adjust_tsf(sdata, beacon);
5189 skb = dev_alloc_skb(local->tx_headroom +
5193 local->hw.extra_beacon_tailroom);
5196 skb_reserve(skb, local->tx_headroom);
5197 skb_put_data(skb, beacon->head, beacon->head_len);
5198 ieee80211_beacon_add_tim(sdata, &ifmsh->ps, skb, is_template);
5201 offs->tim_offset = beacon->head_len;
5202 offs->tim_length = skb->len - beacon->head_len;
5205 skb_put_data(skb, beacon->tail, beacon->tail_len);
5206 ieee80211_beacon_get_finish(hw, vif, offs, beacon, skb,
5220 ieee80211_beacon_get_template(struct ieee80211_hw *hw,
5221 struct ieee80211_vif *vif,
5222 struct ieee80211_mutable_offsets *offs)
5224 return __ieee80211_beacon_get(hw, vif, offs, true);
5226 EXPORT_SYMBOL(ieee80211_beacon_get_template);
5228 struct sk_buff *ieee80211_beacon_get_tim(struct ieee80211_hw *hw,
5229 struct ieee80211_vif *vif,
5230 u16 *tim_offset, u16 *tim_length)
5232 struct ieee80211_mutable_offsets offs = {};
5233 struct sk_buff *bcn = __ieee80211_beacon_get(hw, vif, &offs, false);
5234 struct sk_buff *copy;
5235 struct ieee80211_supported_band *sband;
5242 *tim_offset = offs.tim_offset;
5245 *tim_length = offs.tim_length;
5247 if (ieee80211_hw_check(hw, BEACON_TX_STATUS) ||
5248 !hw_to_local(hw)->monitors)
5251 /* send a copy to monitor interfaces */
5252 copy = skb_copy(bcn, GFP_ATOMIC);
5256 shift = ieee80211_vif_get_shift(vif);
5257 sband = ieee80211_get_sband(vif_to_sdata(vif));
5261 ieee80211_tx_monitor(hw_to_local(hw), copy, sband, 1, shift, false,
5266 EXPORT_SYMBOL(ieee80211_beacon_get_tim);
5268 struct sk_buff *ieee80211_proberesp_get(struct ieee80211_hw *hw,
5269 struct ieee80211_vif *vif)
5271 struct ieee80211_if_ap *ap = NULL;
5272 struct sk_buff *skb = NULL;
5273 struct probe_resp *presp = NULL;
5274 struct ieee80211_hdr *hdr;
5275 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
5277 if (sdata->vif.type != NL80211_IFTYPE_AP)
5283 presp = rcu_dereference(ap->probe_resp);
5287 skb = dev_alloc_skb(presp->len);
5291 skb_put_data(skb, presp->data, presp->len);
5293 hdr = (struct ieee80211_hdr *) skb->data;
5294 memset(hdr->addr1, 0, sizeof(hdr->addr1));
5300 EXPORT_SYMBOL(ieee80211_proberesp_get);
5302 struct sk_buff *ieee80211_get_fils_discovery_tmpl(struct ieee80211_hw *hw,
5303 struct ieee80211_vif *vif)
5305 struct sk_buff *skb = NULL;
5306 struct fils_discovery_data *tmpl = NULL;
5307 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
5309 if (sdata->vif.type != NL80211_IFTYPE_AP)
5313 tmpl = rcu_dereference(sdata->u.ap.fils_discovery);
5319 skb = dev_alloc_skb(sdata->local->hw.extra_tx_headroom + tmpl->len);
5321 skb_reserve(skb, sdata->local->hw.extra_tx_headroom);
5322 skb_put_data(skb, tmpl->data, tmpl->len);
5328 EXPORT_SYMBOL(ieee80211_get_fils_discovery_tmpl);
5331 ieee80211_get_unsol_bcast_probe_resp_tmpl(struct ieee80211_hw *hw,
5332 struct ieee80211_vif *vif)
5334 struct sk_buff *skb = NULL;
5335 struct unsol_bcast_probe_resp_data *tmpl = NULL;
5336 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
5338 if (sdata->vif.type != NL80211_IFTYPE_AP)
5342 tmpl = rcu_dereference(sdata->u.ap.unsol_bcast_probe_resp);
5348 skb = dev_alloc_skb(sdata->local->hw.extra_tx_headroom + tmpl->len);
5350 skb_reserve(skb, sdata->local->hw.extra_tx_headroom);
5351 skb_put_data(skb, tmpl->data, tmpl->len);
5357 EXPORT_SYMBOL(ieee80211_get_unsol_bcast_probe_resp_tmpl);
5359 struct sk_buff *ieee80211_pspoll_get(struct ieee80211_hw *hw,
5360 struct ieee80211_vif *vif)
5362 struct ieee80211_sub_if_data *sdata;
5363 struct ieee80211_if_managed *ifmgd;
5364 struct ieee80211_pspoll *pspoll;
5365 struct ieee80211_local *local;
5366 struct sk_buff *skb;
5368 if (WARN_ON(vif->type != NL80211_IFTYPE_STATION))
5371 sdata = vif_to_sdata(vif);
5372 ifmgd = &sdata->u.mgd;
5373 local = sdata->local;
5375 skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*pspoll));
5379 skb_reserve(skb, local->hw.extra_tx_headroom);
5381 pspoll = skb_put_zero(skb, sizeof(*pspoll));
5382 pspoll->frame_control = cpu_to_le16(IEEE80211_FTYPE_CTL |
5383 IEEE80211_STYPE_PSPOLL);
5384 pspoll->aid = cpu_to_le16(sdata->vif.bss_conf.aid);
5386 /* aid in PS-Poll has its two MSBs each set to 1 */
5387 pspoll->aid |= cpu_to_le16(1 << 15 | 1 << 14);
5389 memcpy(pspoll->bssid, ifmgd->bssid, ETH_ALEN);
5390 memcpy(pspoll->ta, vif->addr, ETH_ALEN);
5394 EXPORT_SYMBOL(ieee80211_pspoll_get);
5396 struct sk_buff *ieee80211_nullfunc_get(struct ieee80211_hw *hw,
5397 struct ieee80211_vif *vif,
5400 struct ieee80211_hdr_3addr *nullfunc;
5401 struct ieee80211_sub_if_data *sdata;
5402 struct ieee80211_if_managed *ifmgd;
5403 struct ieee80211_local *local;
5404 struct sk_buff *skb;
5407 if (WARN_ON(vif->type != NL80211_IFTYPE_STATION))
5410 sdata = vif_to_sdata(vif);
5411 ifmgd = &sdata->u.mgd;
5412 local = sdata->local;
5415 struct sta_info *sta;
5418 sta = sta_info_get(sdata, ifmgd->bssid);
5419 qos = sta && sta->sta.wme;
5423 skb = dev_alloc_skb(local->hw.extra_tx_headroom +
5424 sizeof(*nullfunc) + 2);
5428 skb_reserve(skb, local->hw.extra_tx_headroom);
5430 nullfunc = skb_put_zero(skb, sizeof(*nullfunc));
5431 nullfunc->frame_control = cpu_to_le16(IEEE80211_FTYPE_DATA |
5432 IEEE80211_STYPE_NULLFUNC |
5433 IEEE80211_FCTL_TODS);
5435 __le16 qoshdr = cpu_to_le16(7);
5437 BUILD_BUG_ON((IEEE80211_STYPE_QOS_NULLFUNC |
5438 IEEE80211_STYPE_NULLFUNC) !=
5439 IEEE80211_STYPE_QOS_NULLFUNC);
5440 nullfunc->frame_control |=
5441 cpu_to_le16(IEEE80211_STYPE_QOS_NULLFUNC);
5443 skb_set_queue_mapping(skb, IEEE80211_AC_VO);
5444 skb_put_data(skb, &qoshdr, sizeof(qoshdr));
5447 memcpy(nullfunc->addr1, ifmgd->bssid, ETH_ALEN);
5448 memcpy(nullfunc->addr2, vif->addr, ETH_ALEN);
5449 memcpy(nullfunc->addr3, ifmgd->bssid, ETH_ALEN);
5453 EXPORT_SYMBOL(ieee80211_nullfunc_get);
5455 struct sk_buff *ieee80211_probereq_get(struct ieee80211_hw *hw,
5457 const u8 *ssid, size_t ssid_len,
5460 struct ieee80211_local *local = hw_to_local(hw);
5461 struct ieee80211_hdr_3addr *hdr;
5462 struct sk_buff *skb;
5466 ie_ssid_len = 2 + ssid_len;
5468 skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*hdr) +
5469 ie_ssid_len + tailroom);
5473 skb_reserve(skb, local->hw.extra_tx_headroom);
5475 hdr = skb_put_zero(skb, sizeof(*hdr));
5476 hdr->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
5477 IEEE80211_STYPE_PROBE_REQ);
5478 eth_broadcast_addr(hdr->addr1);
5479 memcpy(hdr->addr2, src_addr, ETH_ALEN);
5480 eth_broadcast_addr(hdr->addr3);
5482 pos = skb_put(skb, ie_ssid_len);
5483 *pos++ = WLAN_EID_SSID;
5486 memcpy(pos, ssid, ssid_len);
5491 EXPORT_SYMBOL(ieee80211_probereq_get);
5493 void ieee80211_rts_get(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
5494 const void *frame, size_t frame_len,
5495 const struct ieee80211_tx_info *frame_txctl,
5496 struct ieee80211_rts *rts)
5498 const struct ieee80211_hdr *hdr = frame;
5500 rts->frame_control =
5501 cpu_to_le16(IEEE80211_FTYPE_CTL | IEEE80211_STYPE_RTS);
5502 rts->duration = ieee80211_rts_duration(hw, vif, frame_len,
5504 memcpy(rts->ra, hdr->addr1, sizeof(rts->ra));
5505 memcpy(rts->ta, hdr->addr2, sizeof(rts->ta));
5507 EXPORT_SYMBOL(ieee80211_rts_get);
5509 void ieee80211_ctstoself_get(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
5510 const void *frame, size_t frame_len,
5511 const struct ieee80211_tx_info *frame_txctl,
5512 struct ieee80211_cts *cts)
5514 const struct ieee80211_hdr *hdr = frame;
5516 cts->frame_control =
5517 cpu_to_le16(IEEE80211_FTYPE_CTL | IEEE80211_STYPE_CTS);
5518 cts->duration = ieee80211_ctstoself_duration(hw, vif,
5519 frame_len, frame_txctl);
5520 memcpy(cts->ra, hdr->addr1, sizeof(cts->ra));
5522 EXPORT_SYMBOL(ieee80211_ctstoself_get);
5525 ieee80211_get_buffered_bc(struct ieee80211_hw *hw,
5526 struct ieee80211_vif *vif)
5528 struct ieee80211_local *local = hw_to_local(hw);
5529 struct sk_buff *skb = NULL;
5530 struct ieee80211_tx_data tx;
5531 struct ieee80211_sub_if_data *sdata;
5533 struct ieee80211_tx_info *info;
5534 struct ieee80211_chanctx_conf *chanctx_conf;
5536 sdata = vif_to_sdata(vif);
5539 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
5544 if (sdata->vif.type == NL80211_IFTYPE_AP) {
5545 struct beacon_data *beacon =
5546 rcu_dereference(sdata->u.ap.beacon);
5548 if (!beacon || !beacon->head)
5551 ps = &sdata->u.ap.ps;
5552 } else if (ieee80211_vif_is_mesh(&sdata->vif)) {
5553 ps = &sdata->u.mesh.ps;
5558 if (ps->dtim_count != 0 || !ps->dtim_bc_mc)
5559 goto out; /* send buffered bc/mc only after DTIM beacon */
5562 skb = skb_dequeue(&ps->bc_buf);
5565 local->total_ps_buffered--;
5567 if (!skb_queue_empty(&ps->bc_buf) && skb->len >= 2) {
5568 struct ieee80211_hdr *hdr =
5569 (struct ieee80211_hdr *) skb->data;
5570 /* more buffered multicast/broadcast frames ==> set
5571 * MoreData flag in IEEE 802.11 header to inform PS
5573 hdr->frame_control |=
5574 cpu_to_le16(IEEE80211_FCTL_MOREDATA);
5577 if (sdata->vif.type == NL80211_IFTYPE_AP)
5578 sdata = IEEE80211_DEV_TO_SUB_IF(skb->dev);
5579 if (!ieee80211_tx_prepare(sdata, &tx, NULL, skb))
5581 ieee80211_free_txskb(hw, skb);
5584 info = IEEE80211_SKB_CB(skb);
5586 tx.flags |= IEEE80211_TX_PS_BUFFERED;
5587 info->band = chanctx_conf->def.chan->band;
5589 if (invoke_tx_handlers(&tx))
5596 EXPORT_SYMBOL(ieee80211_get_buffered_bc);
5598 int ieee80211_reserve_tid(struct ieee80211_sta *pubsta, u8 tid)
5600 struct sta_info *sta = container_of(pubsta, struct sta_info, sta);
5601 struct ieee80211_sub_if_data *sdata = sta->sdata;
5602 struct ieee80211_local *local = sdata->local;
5606 lockdep_assert_held(&local->sta_mtx);
5608 /* only some cases are supported right now */
5609 switch (sdata->vif.type) {
5610 case NL80211_IFTYPE_STATION:
5611 case NL80211_IFTYPE_AP:
5612 case NL80211_IFTYPE_AP_VLAN:
5619 if (WARN_ON(tid >= IEEE80211_NUM_UPS))
5622 if (sta->reserved_tid == tid) {
5627 if (sta->reserved_tid != IEEE80211_TID_UNRESERVED) {
5628 sdata_err(sdata, "TID reservation already active\n");
5633 ieee80211_stop_vif_queues(sdata->local, sdata,
5634 IEEE80211_QUEUE_STOP_REASON_RESERVE_TID);
5638 /* Tear down BA sessions so we stop aggregating on this TID */
5639 if (ieee80211_hw_check(&local->hw, AMPDU_AGGREGATION)) {
5640 set_sta_flag(sta, WLAN_STA_BLOCK_BA);
5641 __ieee80211_stop_tx_ba_session(sta, tid,
5642 AGG_STOP_LOCAL_REQUEST);
5645 queues = BIT(sdata->vif.hw_queue[ieee802_1d_to_ac[tid]]);
5646 __ieee80211_flush_queues(local, sdata, queues, false);
5648 sta->reserved_tid = tid;
5650 ieee80211_wake_vif_queues(local, sdata,
5651 IEEE80211_QUEUE_STOP_REASON_RESERVE_TID);
5653 if (ieee80211_hw_check(&local->hw, AMPDU_AGGREGATION))
5654 clear_sta_flag(sta, WLAN_STA_BLOCK_BA);
5660 EXPORT_SYMBOL(ieee80211_reserve_tid);
5662 void ieee80211_unreserve_tid(struct ieee80211_sta *pubsta, u8 tid)
5664 struct sta_info *sta = container_of(pubsta, struct sta_info, sta);
5665 struct ieee80211_sub_if_data *sdata = sta->sdata;
5667 lockdep_assert_held(&sdata->local->sta_mtx);
5669 /* only some cases are supported right now */
5670 switch (sdata->vif.type) {
5671 case NL80211_IFTYPE_STATION:
5672 case NL80211_IFTYPE_AP:
5673 case NL80211_IFTYPE_AP_VLAN:
5680 if (tid != sta->reserved_tid) {
5681 sdata_err(sdata, "TID to unreserve (%d) isn't reserved\n", tid);
5685 sta->reserved_tid = IEEE80211_TID_UNRESERVED;
5687 EXPORT_SYMBOL(ieee80211_unreserve_tid);
5689 void __ieee80211_tx_skb_tid_band(struct ieee80211_sub_if_data *sdata,
5690 struct sk_buff *skb, int tid,
5691 enum nl80211_band band)
5693 int ac = ieee80211_ac_from_tid(tid);
5695 skb_reset_mac_header(skb);
5696 skb_set_queue_mapping(skb, ac);
5697 skb->priority = tid;
5699 skb->dev = sdata->dev;
5702 * The other path calling ieee80211_xmit is from the tasklet,
5703 * and while we can handle concurrent transmissions locking
5704 * requirements are that we do not come into tx with bhs on.
5707 IEEE80211_SKB_CB(skb)->band = band;
5708 ieee80211_xmit(sdata, NULL, skb);
5712 int ieee80211_tx_control_port(struct wiphy *wiphy, struct net_device *dev,
5713 const u8 *buf, size_t len,
5714 const u8 *dest, __be16 proto, bool unencrypted,
5717 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
5718 struct ieee80211_local *local = sdata->local;
5719 struct sta_info *sta;
5720 struct sk_buff *skb;
5721 struct ethhdr *ehdr;
5725 /* Only accept CONTROL_PORT_PROTOCOL configured in CONNECT/ASSOCIATE
5726 * or Pre-Authentication
5728 if (proto != sdata->control_port_protocol &&
5729 proto != cpu_to_be16(ETH_P_PREAUTH))
5732 if (proto == sdata->control_port_protocol)
5733 ctrl_flags |= IEEE80211_TX_CTRL_PORT_CTRL_PROTO |
5734 IEEE80211_TX_CTRL_SKIP_MPATH_LOOKUP;
5737 flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
5740 ctrl_flags |= IEEE80211_TX_CTL_REQ_TX_STATUS;
5742 flags |= IEEE80211_TX_INTFL_NL80211_FRAME_TX;
5744 skb = dev_alloc_skb(local->hw.extra_tx_headroom +
5745 sizeof(struct ethhdr) + len);
5749 skb_reserve(skb, local->hw.extra_tx_headroom + sizeof(struct ethhdr));
5751 skb_put_data(skb, buf, len);
5753 ehdr = skb_push(skb, sizeof(struct ethhdr));
5754 memcpy(ehdr->h_dest, dest, ETH_ALEN);
5755 memcpy(ehdr->h_source, sdata->vif.addr, ETH_ALEN);
5756 ehdr->h_proto = proto;
5759 skb->protocol = proto;
5760 skb_reset_network_header(skb);
5761 skb_reset_mac_header(skb);
5763 /* update QoS header to prioritize control port frames if possible,
5764 * priorization also happens for control port frames send over
5769 if (ieee80211_lookup_ra_sta(sdata, skb, &sta) == 0 && !IS_ERR(sta)) {
5770 u16 queue = __ieee80211_select_queue(sdata, sta, skb);
5772 skb_set_queue_mapping(skb, queue);
5778 /* mutex lock is only needed for incrementing the cookie counter */
5779 mutex_lock(&local->mtx);
5782 __ieee80211_subif_start_xmit(skb, skb->dev, flags, ctrl_flags, cookie);
5785 mutex_unlock(&local->mtx);
5790 int ieee80211_probe_mesh_link(struct wiphy *wiphy, struct net_device *dev,
5791 const u8 *buf, size_t len)
5793 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
5794 struct ieee80211_local *local = sdata->local;
5795 struct sk_buff *skb;
5797 skb = dev_alloc_skb(local->hw.extra_tx_headroom + len +
5798 30 + /* header size */
5799 18); /* 11s header size */
5803 skb_reserve(skb, local->hw.extra_tx_headroom);
5804 skb_put_data(skb, buf, len);
5807 skb->protocol = htons(ETH_P_802_3);
5808 skb_reset_network_header(skb);
5809 skb_reset_mac_header(skb);
5812 __ieee80211_subif_start_xmit(skb, skb->dev, 0,
5813 IEEE80211_TX_CTRL_SKIP_MPATH_LOOKUP,