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net/mlx4_core: Fix leakage of SW multicast entries
[linux-2.6/btrfs-unstable.git] / net / mac80211 / main.c
blobe0ab4320a078528b27e101c17bfd70ad422ac4fb
1 /*
2 * Copyright 2002-2005, Instant802 Networks, Inc.
3 * Copyright 2005-2006, Devicescape Software, Inc.
4 * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz>
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License version 2 as
8 * published by the Free Software Foundation.
9 */
10
11 #include <net/mac80211.h>
12 #include <linux/module.h>
13 #include <linux/init.h>
14 #include <linux/netdevice.h>
15 #include <linux/types.h>
16 #include <linux/slab.h>
17 #include <linux/skbuff.h>
18 #include <linux/etherdevice.h>
19 #include <linux/if_arp.h>
20 #include <linux/rtnetlink.h>
21 #include <linux/bitmap.h>
22 #include <linux/pm_qos.h>
23 #include <linux/inetdevice.h>
24 #include <net/net_namespace.h>
25 #include <net/cfg80211.h>
26 #include <net/addrconf.h>
27
28 #include "ieee80211_i.h"
29 #include "driver-ops.h"
30 #include "rate.h"
31 #include "mesh.h"
32 #include "wep.h"
33 #include "led.h"
34 #include "cfg.h"
35 #include "debugfs.h"
36
37 void ieee80211_configure_filter(struct ieee80211_local *local)
38 {
39 u64 mc;
40 unsigned int changed_flags;
41 unsigned int new_flags = 0;
42
43 if (atomic_read(&local->iff_promiscs))
44 new_flags |= FIF_PROMISC_IN_BSS;
45
46 if (atomic_read(&local->iff_allmultis))
47 new_flags |= FIF_ALLMULTI;
48
49 if (local->monitors || test_bit(SCAN_SW_SCANNING, &local->scanning) ||
50 test_bit(SCAN_ONCHANNEL_SCANNING, &local->scanning))
51 new_flags |= FIF_BCN_PRBRESP_PROMISC;
52
53 if (local->fif_probe_req || local->probe_req_reg)
54 new_flags |= FIF_PROBE_REQ;
55
56 if (local->fif_fcsfail)
57 new_flags |= FIF_FCSFAIL;
58
59 if (local->fif_plcpfail)
60 new_flags |= FIF_PLCPFAIL;
61
62 if (local->fif_control)
63 new_flags |= FIF_CONTROL;
64
65 if (local->fif_other_bss)
66 new_flags |= FIF_OTHER_BSS;
67
68 if (local->fif_pspoll)
69 new_flags |= FIF_PSPOLL;
70
71 spin_lock_bh(&local->filter_lock);
72 changed_flags = local->filter_flags ^ new_flags;
73
74 mc = drv_prepare_multicast(local, &local->mc_list);
75 spin_unlock_bh(&local->filter_lock);
76
77 /* be a bit nasty */
78 new_flags |= (1<<31);
79
80 drv_configure_filter(local, changed_flags, &new_flags, mc);
81
82 WARN_ON(new_flags & (1<<31));
83
84 local->filter_flags = new_flags & ~(1<<31);
85 }
86
87 static void ieee80211_reconfig_filter(struct work_struct *work)
88 {
89 struct ieee80211_local *local =
90 container_of(work, struct ieee80211_local, reconfig_filter);
91
92 ieee80211_configure_filter(local);
93 }
94
95 static u32 ieee80211_hw_conf_chan(struct ieee80211_local *local)
96 {
97 struct ieee80211_sub_if_data *sdata;
98 struct cfg80211_chan_def chandef = {};
99 u32 changed = 0;
100 int power;
101 u32 offchannel_flag;
102
103 offchannel_flag = local->hw.conf.flags & IEEE80211_CONF_OFFCHANNEL;
104
105 if (local->scan_chandef.chan) {
106 chandef = local->scan_chandef;
107 } else if (local->tmp_channel) {
108 chandef.chan = local->tmp_channel;
109 chandef.width = NL80211_CHAN_WIDTH_20_NOHT;
110 chandef.center_freq1 = chandef.chan->center_freq;
111 } else
112 chandef = local->_oper_chandef;
113
114 WARN(!cfg80211_chandef_valid(&chandef),
115 "control:%d MHz width:%d center: %d/%d MHz",
116 chandef.chan->center_freq, chandef.width,
117 chandef.center_freq1, chandef.center_freq2);
118
119 if (!cfg80211_chandef_identical(&chandef, &local->_oper_chandef))
120 local->hw.conf.flags |= IEEE80211_CONF_OFFCHANNEL;
121 else
122 local->hw.conf.flags &= ~IEEE80211_CONF_OFFCHANNEL;
123
124 offchannel_flag ^= local->hw.conf.flags & IEEE80211_CONF_OFFCHANNEL;
125
126 if (offchannel_flag ||
127 !cfg80211_chandef_identical(&local->hw.conf.chandef,
128 &local->_oper_chandef)) {
129 local->hw.conf.chandef = chandef;
130 changed |= IEEE80211_CONF_CHANGE_CHANNEL;
131 }
132
133 if (!conf_is_ht(&local->hw.conf)) {
134 /*
135 * mac80211.h documents that this is only valid
136 * when the channel is set to an HT type, and
137 * that otherwise STATIC is used.
138 */
139 local->hw.conf.smps_mode = IEEE80211_SMPS_STATIC;
140 } else if (local->hw.conf.smps_mode != local->smps_mode) {
141 local->hw.conf.smps_mode = local->smps_mode;
142 changed |= IEEE80211_CONF_CHANGE_SMPS;
143 }
144
145 power = ieee80211_chandef_max_power(&chandef);
146
147 rcu_read_lock();
148 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
149 if (!rcu_access_pointer(sdata->vif.chanctx_conf))
150 continue;
151 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
152 continue;
153 power = min(power, sdata->vif.bss_conf.txpower);
154 }
155 rcu_read_unlock();
156
157 if (local->hw.conf.power_level != power) {
158 changed |= IEEE80211_CONF_CHANGE_POWER;
159 local->hw.conf.power_level = power;
160 }
161
162 return changed;
163 }
164
165 int ieee80211_hw_config(struct ieee80211_local *local, u32 changed)
166 {
167 int ret = 0;
168
169 might_sleep();
170
171 if (!local->use_chanctx)
172 changed |= ieee80211_hw_conf_chan(local);
173 else
174 changed &= ~(IEEE80211_CONF_CHANGE_CHANNEL |
175 IEEE80211_CONF_CHANGE_POWER);
176
177 if (changed && local->open_count) {
178 ret = drv_config(local, changed);
179 /*
180 * Goal:
181 * HW reconfiguration should never fail, the driver has told
182 * us what it can support so it should live up to that promise.
183 *
184 * Current status:
185 * rfkill is not integrated with mac80211 and a
186 * configuration command can thus fail if hardware rfkill
187 * is enabled
188 *
189 * FIXME: integrate rfkill with mac80211 and then add this
190 * WARN_ON() back
191 *
192 */
193 /* WARN_ON(ret); */
194 }
195
196 return ret;
197 }
198
199 void ieee80211_bss_info_change_notify(struct ieee80211_sub_if_data *sdata,
200 u32 changed)
201 {
202 struct ieee80211_local *local = sdata->local;
203
204 if (!changed || sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
205 return;
206
207 drv_bss_info_changed(local, sdata, &sdata->vif.bss_conf, changed);
208 }
209
210 u32 ieee80211_reset_erp_info(struct ieee80211_sub_if_data *sdata)
211 {
212 sdata->vif.bss_conf.use_cts_prot = false;
213 sdata->vif.bss_conf.use_short_preamble = false;
214 sdata->vif.bss_conf.use_short_slot = false;
215 return BSS_CHANGED_ERP_CTS_PROT |
216 BSS_CHANGED_ERP_PREAMBLE |
217 BSS_CHANGED_ERP_SLOT;
218 }
219
220 static void ieee80211_tasklet_handler(unsigned long data)
221 {
222 struct ieee80211_local *local = (struct ieee80211_local *) data;
223 struct sk_buff *skb;
224
225 while ((skb = skb_dequeue(&local->skb_queue)) ||
226 (skb = skb_dequeue(&local->skb_queue_unreliable))) {
227 switch (skb->pkt_type) {
228 case IEEE80211_RX_MSG:
229 /* Clear skb->pkt_type in order to not confuse kernel
230 * netstack. */
231 skb->pkt_type = 0;
232 ieee80211_rx(&local->hw, skb);
233 break;
234 case IEEE80211_TX_STATUS_MSG:
235 skb->pkt_type = 0;
236 ieee80211_tx_status(&local->hw, skb);
237 break;
238 default:
239 WARN(1, "mac80211: Packet is of unknown type %d\n",
240 skb->pkt_type);
241 dev_kfree_skb(skb);
242 break;
243 }
244 }
245 }
246
247 static void ieee80211_restart_work(struct work_struct *work)
248 {
249 struct ieee80211_local *local =
250 container_of(work, struct ieee80211_local, restart_work);
251
252 /* wait for scan work complete */
253 flush_workqueue(local->workqueue);
254
255 WARN(test_bit(SCAN_HW_SCANNING, &local->scanning),
256 "%s called with hardware scan in progress\n", __func__);
257
258 rtnl_lock();
259 ieee80211_scan_cancel(local);
260 ieee80211_reconfig(local);
261 rtnl_unlock();
262 }
263
264 void ieee80211_restart_hw(struct ieee80211_hw *hw)
265 {
266 struct ieee80211_local *local = hw_to_local(hw);
267
268 trace_api_restart_hw(local);
269
270 wiphy_info(hw->wiphy,
271 "Hardware restart was requested\n");
272
273 /* use this reason, ieee80211_reconfig will unblock it */
274 ieee80211_stop_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP,
275 IEEE80211_QUEUE_STOP_REASON_SUSPEND,
276 false);
277
278 /*
279 * Stop all Rx during the reconfig. We don't want state changes
280 * or driver callbacks while this is in progress.
281 */
282 local->in_reconfig = true;
283 barrier();
284
285 schedule_work(&local->restart_work);
286 }
287 EXPORT_SYMBOL(ieee80211_restart_hw);
288
289 #ifdef CONFIG_INET
290 static int ieee80211_ifa_changed(struct notifier_block *nb,
291 unsigned long data, void *arg)
292 {
293 struct in_ifaddr *ifa = arg;
294 struct ieee80211_local *local =
295 container_of(nb, struct ieee80211_local,
296 ifa_notifier);
297 struct net_device *ndev = ifa->ifa_dev->dev;
298 struct wireless_dev *wdev = ndev->ieee80211_ptr;
299 struct in_device *idev;
300 struct ieee80211_sub_if_data *sdata;
301 struct ieee80211_bss_conf *bss_conf;
302 struct ieee80211_if_managed *ifmgd;
303 int c = 0;
304
305 /* Make sure it's our interface that got changed */
306 if (!wdev)
307 return NOTIFY_DONE;
308
309 if (wdev->wiphy != local->hw.wiphy)
310 return NOTIFY_DONE;
311
312 sdata = IEEE80211_DEV_TO_SUB_IF(ndev);
313 bss_conf = &sdata->vif.bss_conf;
314
315 /* ARP filtering is only supported in managed mode */
316 if (sdata->vif.type != NL80211_IFTYPE_STATION)
317 return NOTIFY_DONE;
318
319 idev = __in_dev_get_rtnl(sdata->dev);
320 if (!idev)
321 return NOTIFY_DONE;
322
323 ifmgd = &sdata->u.mgd;
324 sdata_lock(sdata);
325
326 /* Copy the addresses to the bss_conf list */
327 ifa = idev->ifa_list;
328 while (ifa) {
329 if (c < IEEE80211_BSS_ARP_ADDR_LIST_LEN)
330 bss_conf->arp_addr_list[c] = ifa->ifa_address;
331 ifa = ifa->ifa_next;
332 c++;
333 }
334
335 bss_conf->arp_addr_cnt = c;
336
337 /* Configure driver only if associated (which also implies it is up) */
338 if (ifmgd->associated)
339 ieee80211_bss_info_change_notify(sdata,
340 BSS_CHANGED_ARP_FILTER);
341
342 sdata_unlock(sdata);
343
344 return NOTIFY_OK;
345 }
346 #endif
347
348 #if IS_ENABLED(CONFIG_IPV6)
349 static int ieee80211_ifa6_changed(struct notifier_block *nb,
350 unsigned long data, void *arg)
351 {
352 struct inet6_ifaddr *ifa = (struct inet6_ifaddr *)arg;
353 struct inet6_dev *idev = ifa->idev;
354 struct net_device *ndev = ifa->idev->dev;
355 struct ieee80211_local *local =
356 container_of(nb, struct ieee80211_local, ifa6_notifier);
357 struct wireless_dev *wdev = ndev->ieee80211_ptr;
358 struct ieee80211_sub_if_data *sdata;
359
360 /* Make sure it's our interface that got changed */
361 if (!wdev || wdev->wiphy != local->hw.wiphy)
362 return NOTIFY_DONE;
363
364 sdata = IEEE80211_DEV_TO_SUB_IF(ndev);
365
366 /*
367 * For now only support station mode. This is mostly because
368 * doing AP would have to handle AP_VLAN in some way ...
369 */
370 if (sdata->vif.type != NL80211_IFTYPE_STATION)
371 return NOTIFY_DONE;
372
373 drv_ipv6_addr_change(local, sdata, idev);
374
375 return NOTIFY_OK;
376 }
377 #endif
378
379 /* There isn't a lot of sense in it, but you can transmit anything you like */
380 static const struct ieee80211_txrx_stypes
381 ieee80211_default_mgmt_stypes[NUM_NL80211_IFTYPES] = {
382 [NL80211_IFTYPE_ADHOC] = {
383 .tx = 0xffff,
384 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
385 BIT(IEEE80211_STYPE_AUTH >> 4) |
386 BIT(IEEE80211_STYPE_DEAUTH >> 4) |
387 BIT(IEEE80211_STYPE_PROBE_REQ >> 4),
388 },
389 [NL80211_IFTYPE_STATION] = {
390 .tx = 0xffff,
391 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
392 BIT(IEEE80211_STYPE_PROBE_REQ >> 4),
393 },
394 [NL80211_IFTYPE_AP] = {
395 .tx = 0xffff,
396 .rx = BIT(IEEE80211_STYPE_ASSOC_REQ >> 4) |
397 BIT(IEEE80211_STYPE_REASSOC_REQ >> 4) |
398 BIT(IEEE80211_STYPE_PROBE_REQ >> 4) |
399 BIT(IEEE80211_STYPE_DISASSOC >> 4) |
400 BIT(IEEE80211_STYPE_AUTH >> 4) |
401 BIT(IEEE80211_STYPE_DEAUTH >> 4) |
402 BIT(IEEE80211_STYPE_ACTION >> 4),
403 },
404 [NL80211_IFTYPE_AP_VLAN] = {
405 /* copy AP */
406 .tx = 0xffff,
407 .rx = BIT(IEEE80211_STYPE_ASSOC_REQ >> 4) |
408 BIT(IEEE80211_STYPE_REASSOC_REQ >> 4) |
409 BIT(IEEE80211_STYPE_PROBE_REQ >> 4) |
410 BIT(IEEE80211_STYPE_DISASSOC >> 4) |
411 BIT(IEEE80211_STYPE_AUTH >> 4) |
412 BIT(IEEE80211_STYPE_DEAUTH >> 4) |
413 BIT(IEEE80211_STYPE_ACTION >> 4),
414 },
415 [NL80211_IFTYPE_P2P_CLIENT] = {
416 .tx = 0xffff,
417 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
418 BIT(IEEE80211_STYPE_PROBE_REQ >> 4),
419 },
420 [NL80211_IFTYPE_P2P_GO] = {
421 .tx = 0xffff,
422 .rx = BIT(IEEE80211_STYPE_ASSOC_REQ >> 4) |
423 BIT(IEEE80211_STYPE_REASSOC_REQ >> 4) |
424 BIT(IEEE80211_STYPE_PROBE_REQ >> 4) |
425 BIT(IEEE80211_STYPE_DISASSOC >> 4) |
426 BIT(IEEE80211_STYPE_AUTH >> 4) |
427 BIT(IEEE80211_STYPE_DEAUTH >> 4) |
428 BIT(IEEE80211_STYPE_ACTION >> 4),
429 },
430 [NL80211_IFTYPE_MESH_POINT] = {
431 .tx = 0xffff,
432 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
433 BIT(IEEE80211_STYPE_AUTH >> 4) |
434 BIT(IEEE80211_STYPE_DEAUTH >> 4),
435 },
436 [NL80211_IFTYPE_P2P_DEVICE] = {
437 .tx = 0xffff,
438 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
439 BIT(IEEE80211_STYPE_PROBE_REQ >> 4),
440 },
441 };
442
443 static const struct ieee80211_ht_cap mac80211_ht_capa_mod_mask = {
444 .ampdu_params_info = IEEE80211_HT_AMPDU_PARM_FACTOR |
445 IEEE80211_HT_AMPDU_PARM_DENSITY,
446
447 .cap_info = cpu_to_le16(IEEE80211_HT_CAP_SUP_WIDTH_20_40 |
448 IEEE80211_HT_CAP_MAX_AMSDU |
449 IEEE80211_HT_CAP_SGI_20 |
450 IEEE80211_HT_CAP_SGI_40 |
451 IEEE80211_HT_CAP_LDPC_CODING |
452 IEEE80211_HT_CAP_40MHZ_INTOLERANT),
453 .mcs = {
454 .rx_mask = { 0xff, 0xff, 0xff, 0xff, 0xff,
455 0xff, 0xff, 0xff, 0xff, 0xff, },
456 },
457 };
458
459 static const struct ieee80211_vht_cap mac80211_vht_capa_mod_mask = {
460 .vht_cap_info =
461 cpu_to_le32(IEEE80211_VHT_CAP_RXLDPC |
462 IEEE80211_VHT_CAP_SHORT_GI_80 |
463 IEEE80211_VHT_CAP_SHORT_GI_160 |
464 IEEE80211_VHT_CAP_RXSTBC_1 |
465 IEEE80211_VHT_CAP_RXSTBC_2 |
466 IEEE80211_VHT_CAP_RXSTBC_3 |
467 IEEE80211_VHT_CAP_RXSTBC_4 |
468 IEEE80211_VHT_CAP_TXSTBC |
469 IEEE80211_VHT_CAP_SU_BEAMFORMER_CAPABLE |
470 IEEE80211_VHT_CAP_SU_BEAMFORMEE_CAPABLE |
471 IEEE80211_VHT_CAP_TX_ANTENNA_PATTERN |
472 IEEE80211_VHT_CAP_RX_ANTENNA_PATTERN |
473 IEEE80211_VHT_CAP_MAX_A_MPDU_LENGTH_EXPONENT_MASK),
474 .supp_mcs = {
475 .rx_mcs_map = cpu_to_le16(~0),
476 .tx_mcs_map = cpu_to_le16(~0),
477 },
478 };
479
480 static const u8 extended_capabilities[] = {
481 0, 0, 0, 0, 0, 0, 0,
482 WLAN_EXT_CAPA8_OPMODE_NOTIF,
483 };
484
485 struct ieee80211_hw *ieee80211_alloc_hw(size_t priv_data_len,
486 const struct ieee80211_ops *ops)
487 {
488 struct ieee80211_local *local;
489 int priv_size, i;
490 struct wiphy *wiphy;
491 bool use_chanctx;
492
493 if (WARN_ON(!ops->tx || !ops->start || !ops->stop || !ops->config ||
494 !ops->add_interface || !ops->remove_interface ||
495 !ops->configure_filter))
496 return NULL;
497
498 if (WARN_ON(ops->sta_state && (ops->sta_add || ops->sta_remove)))
499 return NULL;
500
501 /* check all or no channel context operations exist */
502 i = !!ops->add_chanctx + !!ops->remove_chanctx +
503 !!ops->change_chanctx + !!ops->assign_vif_chanctx +
504 !!ops->unassign_vif_chanctx;
505 if (WARN_ON(i != 0 && i != 5))
506 return NULL;
507 use_chanctx = i == 5;
508
509 /* Ensure 32-byte alignment of our private data and hw private data.
510 * We use the wiphy priv data for both our ieee80211_local and for
511 * the driver's private data
512 *
513 * In memory it'll be like this:
514 *
515 * +-------------------------+
516 * | struct wiphy |
517 * +-------------------------+
518 * | struct ieee80211_local |
519 * +-------------------------+
520 * | driver's private data |
521 * +-------------------------+
522 *
523 */
524 priv_size = ALIGN(sizeof(*local), NETDEV_ALIGN) + priv_data_len;
525
526 wiphy = wiphy_new(&mac80211_config_ops, priv_size);
527
528 if (!wiphy)
529 return NULL;
530
531 wiphy->mgmt_stypes = ieee80211_default_mgmt_stypes;
532
533 wiphy->privid = mac80211_wiphy_privid;
534
535 wiphy->flags |= WIPHY_FLAG_NETNS_OK |
536 WIPHY_FLAG_4ADDR_AP |
537 WIPHY_FLAG_4ADDR_STATION |
538 WIPHY_FLAG_REPORTS_OBSS |
539 WIPHY_FLAG_OFFCHAN_TX;
540
541 wiphy->extended_capabilities = extended_capabilities;
542 wiphy->extended_capabilities_mask = extended_capabilities;
543 wiphy->extended_capabilities_len = ARRAY_SIZE(extended_capabilities);
544
545 if (ops->remain_on_channel)
546 wiphy->flags |= WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL;
547
548 wiphy->features |= NL80211_FEATURE_SK_TX_STATUS |
549 NL80211_FEATURE_SAE |
550 NL80211_FEATURE_HT_IBSS |
551 NL80211_FEATURE_VIF_TXPOWER |
552 NL80211_FEATURE_USERSPACE_MPM;
553
554 if (!ops->hw_scan)
555 wiphy->features |= NL80211_FEATURE_LOW_PRIORITY_SCAN |
556 NL80211_FEATURE_AP_SCAN;
557
558
559 if (!ops->set_key)
560 wiphy->flags |= WIPHY_FLAG_IBSS_RSN;
561
562 wiphy->bss_priv_size = sizeof(struct ieee80211_bss);
563
564 local = wiphy_priv(wiphy);
565
566 local->hw.wiphy = wiphy;
567
568 local->hw.priv = (char *)local + ALIGN(sizeof(*local), NETDEV_ALIGN);
569
570 local->ops = ops;
571 local->use_chanctx = use_chanctx;
572
573 /* set up some defaults */
574 local->hw.queues = 1;
575 local->hw.max_rates = 1;
576 local->hw.max_report_rates = 0;
577 local->hw.max_rx_aggregation_subframes = IEEE80211_MAX_AMPDU_BUF;
578 local->hw.max_tx_aggregation_subframes = IEEE80211_MAX_AMPDU_BUF;
579 local->hw.offchannel_tx_hw_queue = IEEE80211_INVAL_HW_QUEUE;
580 local->hw.conf.long_frame_max_tx_count = wiphy->retry_long;
581 local->hw.conf.short_frame_max_tx_count = wiphy->retry_short;
582 local->hw.radiotap_mcs_details = IEEE80211_RADIOTAP_MCS_HAVE_MCS |
583 IEEE80211_RADIOTAP_MCS_HAVE_GI |
584 IEEE80211_RADIOTAP_MCS_HAVE_BW;
585 local->hw.radiotap_vht_details = IEEE80211_RADIOTAP_VHT_KNOWN_GI |
586 IEEE80211_RADIOTAP_VHT_KNOWN_BANDWIDTH;
587 local->hw.uapsd_queues = IEEE80211_DEFAULT_UAPSD_QUEUES;
588 local->hw.uapsd_max_sp_len = IEEE80211_DEFAULT_MAX_SP_LEN;
589 local->user_power_level = IEEE80211_UNSET_POWER_LEVEL;
590 wiphy->ht_capa_mod_mask = &mac80211_ht_capa_mod_mask;
591 wiphy->vht_capa_mod_mask = &mac80211_vht_capa_mod_mask;
592
593 INIT_LIST_HEAD(&local->interfaces);
594
595 __hw_addr_init(&local->mc_list);
596
597 mutex_init(&local->iflist_mtx);
598 mutex_init(&local->mtx);
599
600 mutex_init(&local->key_mtx);
601 spin_lock_init(&local->filter_lock);
602 spin_lock_init(&local->rx_path_lock);
603 spin_lock_init(&local->queue_stop_reason_lock);
604
605 INIT_LIST_HEAD(&local->chanctx_list);
606 mutex_init(&local->chanctx_mtx);
607
608 INIT_DELAYED_WORK(&local->scan_work, ieee80211_scan_work);
609
610 INIT_WORK(&local->restart_work, ieee80211_restart_work);
611
612 INIT_WORK(&local->radar_detected_work,
613 ieee80211_dfs_radar_detected_work);
614
615 INIT_WORK(&local->reconfig_filter, ieee80211_reconfig_filter);
616 local->smps_mode = IEEE80211_SMPS_OFF;
617
618 INIT_WORK(&local->dynamic_ps_enable_work,
619 ieee80211_dynamic_ps_enable_work);
620 INIT_WORK(&local->dynamic_ps_disable_work,
621 ieee80211_dynamic_ps_disable_work);
622 setup_timer(&local->dynamic_ps_timer,
623 ieee80211_dynamic_ps_timer, (unsigned long) local);
624
625 INIT_WORK(&local->sched_scan_stopped_work,
626 ieee80211_sched_scan_stopped_work);
627
628 spin_lock_init(&local->ack_status_lock);
629 idr_init(&local->ack_status_frames);
630
631 sta_info_init(local);
632
633 for (i = 0; i < IEEE80211_MAX_QUEUES; i++) {
634 skb_queue_head_init(&local->pending[i]);
635 atomic_set(&local->agg_queue_stop[i], 0);
636 }
637 tasklet_init(&local->tx_pending_tasklet, ieee80211_tx_pending,
638 (unsigned long)local);
639
640 tasklet_init(&local->tasklet,
641 ieee80211_tasklet_handler,
642 (unsigned long) local);
643
644 skb_queue_head_init(&local->skb_queue);
645 skb_queue_head_init(&local->skb_queue_unreliable);
646
647 ieee80211_led_names(local);
648
649 ieee80211_roc_setup(local);
650
651 return &local->hw;
652 }
653 EXPORT_SYMBOL(ieee80211_alloc_hw);
654
655 static int ieee80211_init_cipher_suites(struct ieee80211_local *local)
656 {
657 bool have_wep = !(IS_ERR(local->wep_tx_tfm) ||
658 IS_ERR(local->wep_rx_tfm));
659 bool have_mfp = local->hw.flags & IEEE80211_HW_MFP_CAPABLE;
660 const struct ieee80211_cipher_scheme *cs = local->hw.cipher_schemes;
661 int n_suites = 0, r = 0, w = 0;
662 u32 *suites;
663 static const u32 cipher_suites[] = {
664 /* keep WEP first, it may be removed below */
665 WLAN_CIPHER_SUITE_WEP40,
666 WLAN_CIPHER_SUITE_WEP104,
667 WLAN_CIPHER_SUITE_TKIP,
668 WLAN_CIPHER_SUITE_CCMP,
669
670 /* keep last -- depends on hw flags! */
671 WLAN_CIPHER_SUITE_AES_CMAC
672 };
673
674 /* Driver specifies the ciphers, we have nothing to do... */
675 if (local->hw.wiphy->cipher_suites && have_wep)
676 return 0;
677
678 /* Set up cipher suites if driver relies on mac80211 cipher defs */
679 if (!local->hw.wiphy->cipher_suites && !cs) {
680 local->hw.wiphy->cipher_suites = cipher_suites;
681 local->hw.wiphy->n_cipher_suites = ARRAY_SIZE(cipher_suites);
682
683 if (!have_mfp)
684 local->hw.wiphy->n_cipher_suites--;
685
686 if (!have_wep) {
687 local->hw.wiphy->cipher_suites += 2;
688 local->hw.wiphy->n_cipher_suites -= 2;
689 }
690
691 return 0;
692 }
693
694 if (!local->hw.wiphy->cipher_suites) {
695 /*
696 * Driver specifies cipher schemes only
697 * We start counting ciphers defined by schemes, TKIP and CCMP
698 */
699 n_suites = local->hw.n_cipher_schemes + 2;
700
701 /* check if we have WEP40 and WEP104 */
702 if (have_wep)
703 n_suites += 2;
704
705 /* check if we have AES_CMAC */
706 if (have_mfp)
707 n_suites++;
708
709 suites = kmalloc(sizeof(u32) * n_suites, GFP_KERNEL);
710 if (!suites)
711 return -ENOMEM;
712
713 suites[w++] = WLAN_CIPHER_SUITE_CCMP;
714 suites[w++] = WLAN_CIPHER_SUITE_TKIP;
715
716 if (have_wep) {
717 suites[w++] = WLAN_CIPHER_SUITE_WEP40;
718 suites[w++] = WLAN_CIPHER_SUITE_WEP104;
719 }
720
721 if (have_mfp)
722 suites[w++] = WLAN_CIPHER_SUITE_AES_CMAC;
723
724 for (r = 0; r < local->hw.n_cipher_schemes; r++)
725 suites[w++] = cs[r].cipher;
726 } else {
727 /* Driver provides cipher suites, but we need to exclude WEP */
728 suites = kmemdup(local->hw.wiphy->cipher_suites,
729 sizeof(u32) * local->hw.wiphy->n_cipher_suites,
730 GFP_KERNEL);
731 if (!suites)
732 return -ENOMEM;
733
734 for (r = 0; r < local->hw.wiphy->n_cipher_suites; r++) {
735 u32 suite = local->hw.wiphy->cipher_suites[r];
736
737 if (suite == WLAN_CIPHER_SUITE_WEP40 ||
738 suite == WLAN_CIPHER_SUITE_WEP104)
739 continue;
740 suites[w++] = suite;
741 }
742 }
743
744 local->hw.wiphy->cipher_suites = suites;
745 local->hw.wiphy->n_cipher_suites = w;
746 local->wiphy_ciphers_allocated = true;
747
748 return 0;
749 }
750
751 int ieee80211_register_hw(struct ieee80211_hw *hw)
752 {
753 struct ieee80211_local *local = hw_to_local(hw);
754 int result, i;
755 enum ieee80211_band band;
756 int channels, max_bitrates;
757 bool supp_ht, supp_vht;
758 netdev_features_t feature_whitelist;
759 struct cfg80211_chan_def dflt_chandef = {};
760
761 if (hw->flags & IEEE80211_HW_QUEUE_CONTROL &&
762 (local->hw.offchannel_tx_hw_queue == IEEE80211_INVAL_HW_QUEUE ||
763 local->hw.offchannel_tx_hw_queue >= local->hw.queues))
764 return -EINVAL;
765
766 #ifdef CONFIG_PM
767 if (hw->wiphy->wowlan && (!local->ops->suspend || !local->ops->resume))
768 return -EINVAL;
769 #endif
770
771 if (!local->use_chanctx) {
772 for (i = 0; i < local->hw.wiphy->n_iface_combinations; i++) {
773 const struct ieee80211_iface_combination *comb;
774
775 comb = &local->hw.wiphy->iface_combinations[i];
776
777 if (comb->num_different_channels > 1)
778 return -EINVAL;
779 }
780 } else {
781 /*
782 * WDS is currently prohibited when channel contexts are used
783 * because there's no clear definition of which channel WDS
784 * type interfaces use
785 */
786 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_WDS))
787 return -EINVAL;
788
789 /* DFS currently not supported with channel context drivers */
790 for (i = 0; i < local->hw.wiphy->n_iface_combinations; i++) {
791 const struct ieee80211_iface_combination *comb;
792
793 comb = &local->hw.wiphy->iface_combinations[i];
794
795 if (comb->radar_detect_widths)
796 return -EINVAL;
797 }
798 }
799
800 /* Only HW csum features are currently compatible with mac80211 */
801 feature_whitelist = NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM |
802 NETIF_F_HW_CSUM;
803 if (WARN_ON(hw->netdev_features & ~feature_whitelist))
804 return -EINVAL;
805
806 if (hw->max_report_rates == 0)
807 hw->max_report_rates = hw->max_rates;
808
809 local->rx_chains = 1;
810
811 /*
812 * generic code guarantees at least one band,
813 * set this very early because much code assumes
814 * that hw.conf.channel is assigned
815 */
816 channels = 0;
817 max_bitrates = 0;
818 supp_ht = false;
819 supp_vht = false;
820 for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
821 struct ieee80211_supported_band *sband;
822
823 sband = local->hw.wiphy->bands[band];
824 if (!sband)
825 continue;
826
827 if (!dflt_chandef.chan) {
828 cfg80211_chandef_create(&dflt_chandef,
829 &sband->channels[0],
830 NL80211_CHAN_NO_HT);
831 /* init channel we're on */
832 if (!local->use_chanctx && !local->_oper_chandef.chan) {
833 local->hw.conf.chandef = dflt_chandef;
834 local->_oper_chandef = dflt_chandef;
835 }
836 local->monitor_chandef = dflt_chandef;
837 }
838
839 channels += sband->n_channels;
840
841 if (max_bitrates < sband->n_bitrates)
842 max_bitrates = sband->n_bitrates;
843 supp_ht = supp_ht || sband->ht_cap.ht_supported;
844 supp_vht = supp_vht || sband->vht_cap.vht_supported;
845
846 if (sband->ht_cap.ht_supported)
847 local->rx_chains =
848 max(ieee80211_mcs_to_chains(&sband->ht_cap.mcs),
849 local->rx_chains);
850
851 /* TODO: consider VHT for RX chains, hopefully it's the same */
852 }
853
854 /* if low-level driver supports AP, we also support VLAN */
855 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_AP)) {
856 hw->wiphy->interface_modes |= BIT(NL80211_IFTYPE_AP_VLAN);
857 hw->wiphy->software_iftypes |= BIT(NL80211_IFTYPE_AP_VLAN);
858 }
859
860 /* mac80211 always supports monitor */
861 hw->wiphy->interface_modes |= BIT(NL80211_IFTYPE_MONITOR);
862 hw->wiphy->software_iftypes |= BIT(NL80211_IFTYPE_MONITOR);
863
864 /* mac80211 doesn't support more than one IBSS interface right now */
865 for (i = 0; i < hw->wiphy->n_iface_combinations; i++) {
866 const struct ieee80211_iface_combination *c;
867 int j;
868
869 c = &hw->wiphy->iface_combinations[i];
870
871 for (j = 0; j < c->n_limits; j++)
872 if ((c->limits[j].types & BIT(NL80211_IFTYPE_ADHOC)) &&
873 c->limits[j].max > 1)
874 return -EINVAL;
875 }
876
877 local->int_scan_req = kzalloc(sizeof(*local->int_scan_req) +
878 sizeof(void *) * channels, GFP_KERNEL);
879 if (!local->int_scan_req)
880 return -ENOMEM;
881
882 for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
883 if (!local->hw.wiphy->bands[band])
884 continue;
885 local->int_scan_req->rates[band] = (u32) -1;
886 }
887
888 #ifndef CONFIG_MAC80211_MESH
889 /* mesh depends on Kconfig, but drivers should set it if they want */
890 local->hw.wiphy->interface_modes &= ~BIT(NL80211_IFTYPE_MESH_POINT);
891 #endif
892
893 /* if the underlying driver supports mesh, mac80211 will (at least)
894 * provide routing of mesh authentication frames to userspace */
895 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_MESH_POINT))
896 local->hw.wiphy->flags |= WIPHY_FLAG_MESH_AUTH;
897
898 /* mac80211 supports control port protocol changing */
899 local->hw.wiphy->flags |= WIPHY_FLAG_CONTROL_PORT_PROTOCOL;
900
901 if (local->hw.flags & IEEE80211_HW_SIGNAL_DBM) {
902 local->hw.wiphy->signal_type = CFG80211_SIGNAL_TYPE_MBM;
903 } else if (local->hw.flags & IEEE80211_HW_SIGNAL_UNSPEC) {
904 local->hw.wiphy->signal_type = CFG80211_SIGNAL_TYPE_UNSPEC;
905 if (hw->max_signal <= 0) {
906 result = -EINVAL;
907 goto fail_wiphy_register;
908 }
909 }
910
911 WARN((local->hw.flags & IEEE80211_HW_SUPPORTS_UAPSD)
912 && (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK),
913 "U-APSD not supported with HW_PS_NULLFUNC_STACK\n");
914
915 /*
916 * Calculate scan IE length -- we need this to alloc
917 * memory and to subtract from the driver limit. It
918 * includes the DS Params, (extended) supported rates, and HT
919 * information -- SSID is the driver's responsibility.
920 */
921 local->scan_ies_len = 4 + max_bitrates /* (ext) supp rates */ +
922 3 /* DS Params */;
923 if (supp_ht)
924 local->scan_ies_len += 2 + sizeof(struct ieee80211_ht_cap);
925
926 if (supp_vht)
927 local->scan_ies_len +=
928 2 + sizeof(struct ieee80211_vht_cap);
929
930 if (!local->ops->hw_scan) {
931 /* For hw_scan, driver needs to set these up. */
932 local->hw.wiphy->max_scan_ssids = 4;
933 local->hw.wiphy->max_scan_ie_len = IEEE80211_MAX_DATA_LEN;
934 }
935
936 /*
937 * If the driver supports any scan IEs, then assume the
938 * limit includes the IEs mac80211 will add, otherwise
939 * leave it at zero and let the driver sort it out; we
940 * still pass our IEs to the driver but userspace will
941 * not be allowed to in that case.
942 */
943 if (local->hw.wiphy->max_scan_ie_len)
944 local->hw.wiphy->max_scan_ie_len -= local->scan_ies_len;
945
946 WARN_ON(!ieee80211_cs_list_valid(local->hw.cipher_schemes,
947 local->hw.n_cipher_schemes));
948
949 result = ieee80211_init_cipher_suites(local);
950 if (result < 0)
951 goto fail_wiphy_register;
952
953 if (!local->ops->remain_on_channel)
954 local->hw.wiphy->max_remain_on_channel_duration = 5000;
955
956 /* mac80211 based drivers don't support internal TDLS setup */
957 if (local->hw.wiphy->flags & WIPHY_FLAG_SUPPORTS_TDLS)
958 local->hw.wiphy->flags |= WIPHY_FLAG_TDLS_EXTERNAL_SETUP;
959
960 local->hw.wiphy->max_num_csa_counters = IEEE80211_MAX_CSA_COUNTERS_NUM;
961
962 result = wiphy_register(local->hw.wiphy);
963 if (result < 0)
964 goto fail_wiphy_register;
965
966 /*
967 * We use the number of queues for feature tests (QoS, HT) internally
968 * so restrict them appropriately.
969 */
970 if (hw->queues > IEEE80211_MAX_QUEUES)
971 hw->queues = IEEE80211_MAX_QUEUES;
972
973 local->workqueue =
974 alloc_ordered_workqueue("%s", 0, wiphy_name(local->hw.wiphy));
975 if (!local->workqueue) {
976 result = -ENOMEM;
977 goto fail_workqueue;
978 }
979
980 /*
981 * The hardware needs headroom for sending the frame,
982 * and we need some headroom for passing the frame to monitor
983 * interfaces, but never both at the same time.
984 */
985 local->tx_headroom = max_t(unsigned int , local->hw.extra_tx_headroom,
986 IEEE80211_TX_STATUS_HEADROOM);
987
988 debugfs_hw_add(local);
989
990 /*
991 * if the driver doesn't specify a max listen interval we
992 * use 5 which should be a safe default
993 */
994 if (local->hw.max_listen_interval == 0)
995 local->hw.max_listen_interval = 5;
996
997 local->hw.conf.listen_interval = local->hw.max_listen_interval;
998
999 local->dynamic_ps_forced_timeout = -1;
1000
1001 result = ieee80211_wep_init(local);
1002 if (result < 0)
1003 wiphy_debug(local->hw.wiphy, "Failed to initialize wep: %d\n",
1004 result);
1005
1006 local->hw.conf.flags = IEEE80211_CONF_IDLE;
1007
1008 ieee80211_led_init(local);
1009
1010 rtnl_lock();
1011
1012 result = ieee80211_init_rate_ctrl_alg(local,
1013 hw->rate_control_algorithm);
1014 if (result < 0) {
1015 wiphy_debug(local->hw.wiphy,
1016 "Failed to initialize rate control algorithm\n");
1017 goto fail_rate;
1018 }
1019
1020 /* add one default STA interface if supported */
1021 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_STATION)) {
1022 result = ieee80211_if_add(local, "wlan%d", NULL,
1023 NL80211_IFTYPE_STATION, NULL);
1024 if (result)
1025 wiphy_warn(local->hw.wiphy,
1026 "Failed to add default virtual iface\n");
1027 }
1028
1029 rtnl_unlock();
1030
1031 local->network_latency_notifier.notifier_call =
1032 ieee80211_max_network_latency;
1033 result = pm_qos_add_notifier(PM_QOS_NETWORK_LATENCY,
1034 &local->network_latency_notifier);
1035 if (result) {
1036 rtnl_lock();
1037 goto fail_pm_qos;
1038 }
1039
1040 #ifdef CONFIG_INET
1041 local->ifa_notifier.notifier_call = ieee80211_ifa_changed;
1042 result = register_inetaddr_notifier(&local->ifa_notifier);
1043 if (result)
1044 goto fail_ifa;
1045 #endif
1046
1047 #if IS_ENABLED(CONFIG_IPV6)
1048 local->ifa6_notifier.notifier_call = ieee80211_ifa6_changed;
1049 result = register_inet6addr_notifier(&local->ifa6_notifier);
1050 if (result)
1051 goto fail_ifa6;
1052 #endif
1053
1054 return 0;
1055
1056 #if IS_ENABLED(CONFIG_IPV6)
1057 fail_ifa6:
1058 #ifdef CONFIG_INET
1059 unregister_inetaddr_notifier(&local->ifa_notifier);
1060 #endif
1061 #endif
1062 #if defined(CONFIG_INET) || defined(CONFIG_IPV6)
1063 fail_ifa:
1064 pm_qos_remove_notifier(PM_QOS_NETWORK_LATENCY,
1065 &local->network_latency_notifier);
1066 rtnl_lock();
1067 #endif
1068 fail_pm_qos:
1069 ieee80211_led_exit(local);
1070 ieee80211_remove_interfaces(local);
1071 fail_rate:
1072 rtnl_unlock();
1073 ieee80211_wep_free(local);
1074 sta_info_stop(local);
1075 destroy_workqueue(local->workqueue);
1076 fail_workqueue:
1077 wiphy_unregister(local->hw.wiphy);
1078 fail_wiphy_register:
1079 if (local->wiphy_ciphers_allocated)
1080 kfree(local->hw.wiphy->cipher_suites);
1081 kfree(local->int_scan_req);
1082 return result;
1083 }
1084 EXPORT_SYMBOL(ieee80211_register_hw);
1085
1086 void ieee80211_napi_add(struct ieee80211_hw *hw, struct napi_struct *napi,
1087 struct net_device *napi_dev,
1088 int (*poll)(struct napi_struct *, int),
1089 int weight)
1090 {
1091 struct ieee80211_local *local = hw_to_local(hw);
1092
1093 netif_napi_add(napi_dev, napi, poll, weight);
1094 local->napi = napi;
1095 }
1096 EXPORT_SYMBOL_GPL(ieee80211_napi_add);
1097
1098 void ieee80211_unregister_hw(struct ieee80211_hw *hw)
1099 {
1100 struct ieee80211_local *local = hw_to_local(hw);
1101
1102 tasklet_kill(&local->tx_pending_tasklet);
1103 tasklet_kill(&local->tasklet);
1104
1105 pm_qos_remove_notifier(PM_QOS_NETWORK_LATENCY,
1106 &local->network_latency_notifier);
1107 #ifdef CONFIG_INET
1108 unregister_inetaddr_notifier(&local->ifa_notifier);
1109 #endif
1110 #if IS_ENABLED(CONFIG_IPV6)
1111 unregister_inet6addr_notifier(&local->ifa6_notifier);
1112 #endif
1113
1114 rtnl_lock();
1115
1116 /*
1117 * At this point, interface list manipulations are fine
1118 * because the driver cannot be handing us frames any
1119 * more and the tasklet is killed.
1120 */
1121 ieee80211_remove_interfaces(local);
1122
1123 rtnl_unlock();
1124
1125 cancel_work_sync(&local->restart_work);
1126 cancel_work_sync(&local->reconfig_filter);
1127 flush_work(&local->sched_scan_stopped_work);
1128
1129 ieee80211_clear_tx_pending(local);
1130 rate_control_deinitialize(local);
1131
1132 if (skb_queue_len(&local->skb_queue) ||
1133 skb_queue_len(&local->skb_queue_unreliable))
1134 wiphy_warn(local->hw.wiphy, "skb_queue not empty\n");
1135 skb_queue_purge(&local->skb_queue);
1136 skb_queue_purge(&local->skb_queue_unreliable);
1137
1138 destroy_workqueue(local->workqueue);
1139 wiphy_unregister(local->hw.wiphy);
1140 sta_info_stop(local);
1141 ieee80211_wep_free(local);
1142 ieee80211_led_exit(local);
1143 kfree(local->int_scan_req);
1144 }
1145 EXPORT_SYMBOL(ieee80211_unregister_hw);
1146
1147 static int ieee80211_free_ack_frame(int id, void *p, void *data)
1148 {
1149 WARN_ONCE(1, "Have pending ack frames!\n");
1150 kfree_skb(p);
1151 return 0;
1152 }
1153
1154 void ieee80211_free_hw(struct ieee80211_hw *hw)
1155 {
1156 struct ieee80211_local *local = hw_to_local(hw);
1157
1158 mutex_destroy(&local->iflist_mtx);
1159 mutex_destroy(&local->mtx);
1160
1161 if (local->wiphy_ciphers_allocated)
1162 kfree(local->hw.wiphy->cipher_suites);
1163
1164 idr_for_each(&local->ack_status_frames,
1165 ieee80211_free_ack_frame, NULL);
1166 idr_destroy(&local->ack_status_frames);
1167
1168 kfree(rcu_access_pointer(local->tx_latency));
1169
1170 wiphy_free(local->hw.wiphy);
1171 }
1172 EXPORT_SYMBOL(ieee80211_free_hw);
1173
1174 static int __init ieee80211_init(void)
1175 {
1176 struct sk_buff *skb;
1177 int ret;
1178
1179 BUILD_BUG_ON(sizeof(struct ieee80211_tx_info) > sizeof(skb->cb));
1180 BUILD_BUG_ON(offsetof(struct ieee80211_tx_info, driver_data) +
1181 IEEE80211_TX_INFO_DRIVER_DATA_SIZE > sizeof(skb->cb));
1182
1183 ret = rc80211_minstrel_init();
1184 if (ret)
1185 return ret;
1186
1187 ret = rc80211_minstrel_ht_init();
1188 if (ret)
1189 goto err_minstrel;
1190
1191 ret = ieee80211_iface_init();
1192 if (ret)
1193 goto err_netdev;
1194
1195 return 0;
1196 err_netdev:
1197 rc80211_minstrel_ht_exit();
1198 err_minstrel:
1199 rc80211_minstrel_exit();
1200
1201 return ret;
1202 }
1203
1204 static void __exit ieee80211_exit(void)
1205 {
1206 rc80211_minstrel_ht_exit();
1207 rc80211_minstrel_exit();
1208
1209 ieee80211s_stop();
1210
1211 ieee80211_iface_exit();
1212
1213 rcu_barrier();
1214 }
1215
1216
1217 subsys_initcall(ieee80211_init);
1218 module_exit(ieee80211_exit);
1219
1220 MODULE_DESCRIPTION("IEEE 802.11 subsystem");
1221 MODULE_LICENSE("GPL");
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