1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3 * Interface handling
4 *
5 * Copyright 2002-2005, Instant802 Networks, Inc.
6 * Copyright 2005-2006, Devicescape Software, Inc.
7 * Copyright (c) 2006 Jiri Benc <jbenc@suse.cz>
8 * Copyright 2008, Johannes Berg <johannes@sipsolutions.net>
9 * Copyright 2013-2014 Intel Mobile Communications GmbH
10 * Copyright (c) 2016 Intel Deutschland GmbH
11 * Copyright (C) 2018 Intel Corporation
12 */
13 #include <linux/slab.h>
14 #include <linux/kernel.h>
15 #include <linux/if_arp.h>
16 #include <linux/netdevice.h>
17 #include <linux/rtnetlink.h>
18 #include <net/mac80211.h>
19 #include <net/ieee80211_radiotap.h>
20 #include "ieee80211_i.h"
21 #include "sta_info.h"
22 #include "debugfs_netdev.h"
23 #include "mesh.h"
24 #include "led.h"
25 #include "driver-ops.h"
26 #include "wme.h"
27 #include "rate.h"
28
29 /**
30 * DOC: Interface list locking
31 *
32 * The interface list in each struct ieee80211_local is protected
33 * three-fold:
34 *
35 * (1) modifications may only be done under the RTNL
36 * (2) modifications and readers are protected against each other by
37 * the iflist_mtx.
38 * (3) modifications are done in an RCU manner so atomic readers
39 * can traverse the list in RCU-safe blocks.
40 *
41 * As a consequence, reads (traversals) of the list can be protected
42 * by either the RTNL, the iflist_mtx or RCU.
43 */
44
45 #ifdef CONFIG_DRIVERS_HDF_XR829
46 extern struct net_device *get_krn_netdev(void);
47 struct ieee80211_sub_if_data *g_hdf_sdata = NULL;
48
49 struct ieee80211_sub_if_data *
getDeviceSData(void)50 getDeviceSData(void)
51 {
52 return g_hdf_sdata;
53 }
54 #endif
55
56 static void ieee80211_iface_work(struct work_struct *work);
57
__ieee80211_recalc_txpower(struct ieee80211_sub_if_data * sdata)58 bool __ieee80211_recalc_txpower(struct ieee80211_sub_if_data *sdata)
59 {
60 struct ieee80211_chanctx_conf *chanctx_conf;
61 int power;
62
63 rcu_read_lock();
64 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
65 if (!chanctx_conf) {
66 rcu_read_unlock();
67 return false;
68 }
69
70 power = ieee80211_chandef_max_power(&chanctx_conf->def);
71 rcu_read_unlock();
72
73 if (sdata->user_power_level != IEEE80211_UNSET_POWER_LEVEL)
74 power = min(power, sdata->user_power_level);
75
76 if (sdata->ap_power_level != IEEE80211_UNSET_POWER_LEVEL)
77 power = min(power, sdata->ap_power_level);
78
79 if (power != sdata->vif.bss_conf.txpower) {
80 sdata->vif.bss_conf.txpower = power;
81 ieee80211_hw_config(sdata->local, 0);
82 return true;
83 }
84
85 return false;
86 }
87
ieee80211_recalc_txpower(struct ieee80211_sub_if_data * sdata,bool update_bss)88 void ieee80211_recalc_txpower(struct ieee80211_sub_if_data *sdata,
89 bool update_bss)
90 {
91 if (__ieee80211_recalc_txpower(sdata) ||
92 (update_bss && ieee80211_sdata_running(sdata)))
93 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_TXPOWER);
94 }
95
__ieee80211_idle_off(struct ieee80211_local * local)96 static u32 __ieee80211_idle_off(struct ieee80211_local *local)
97 {
98 if (!(local->hw.conf.flags & IEEE80211_CONF_IDLE))
99 return 0;
100
101 local->hw.conf.flags &= ~IEEE80211_CONF_IDLE;
102 return IEEE80211_CONF_CHANGE_IDLE;
103 }
104
__ieee80211_idle_on(struct ieee80211_local * local)105 static u32 __ieee80211_idle_on(struct ieee80211_local *local)
106 {
107 if (local->hw.conf.flags & IEEE80211_CONF_IDLE)
108 return 0;
109
110 ieee80211_flush_queues(local, NULL, false);
111
112 local->hw.conf.flags |= IEEE80211_CONF_IDLE;
113 return IEEE80211_CONF_CHANGE_IDLE;
114 }
115
__ieee80211_recalc_idle(struct ieee80211_local * local,bool force_active)116 static u32 __ieee80211_recalc_idle(struct ieee80211_local *local,
117 bool force_active)
118 {
119 bool working, scanning, active;
120 unsigned int led_trig_start = 0, led_trig_stop = 0;
121
122 lockdep_assert_held(&local->mtx);
123
124 active = force_active ||
125 !list_empty(&local->chanctx_list) ||
126 local->monitors;
127
128 working = !local->ops->remain_on_channel &&
129 !list_empty(&local->roc_list);
130
131 scanning = test_bit(SCAN_SW_SCANNING, &local->scanning) ||
132 test_bit(SCAN_ONCHANNEL_SCANNING, &local->scanning);
133
134 if (working || scanning)
135 led_trig_start |= IEEE80211_TPT_LEDTRIG_FL_WORK;
136 else
137 led_trig_stop |= IEEE80211_TPT_LEDTRIG_FL_WORK;
138
139 if (active)
140 led_trig_start |= IEEE80211_TPT_LEDTRIG_FL_CONNECTED;
141 else
142 led_trig_stop |= IEEE80211_TPT_LEDTRIG_FL_CONNECTED;
143
144 ieee80211_mod_tpt_led_trig(local, led_trig_start, led_trig_stop);
145
146 if (working || scanning || active)
147 return __ieee80211_idle_off(local);
148 return __ieee80211_idle_on(local);
149 }
150
ieee80211_idle_off(struct ieee80211_local * local)151 u32 ieee80211_idle_off(struct ieee80211_local *local)
152 {
153 return __ieee80211_recalc_idle(local, true);
154 }
155
ieee80211_recalc_idle(struct ieee80211_local * local)156 void ieee80211_recalc_idle(struct ieee80211_local *local)
157 {
158 u32 change = __ieee80211_recalc_idle(local, false);
159 if (change)
160 ieee80211_hw_config(local, change);
161 }
162
ieee80211_verify_mac(struct ieee80211_sub_if_data * sdata,u8 * addr,bool check_dup)163 static int ieee80211_verify_mac(struct ieee80211_sub_if_data *sdata, u8 *addr,
164 bool check_dup)
165 {
166 struct ieee80211_local *local = sdata->local;
167 struct ieee80211_sub_if_data *iter;
168 u64 new, mask, tmp;
169 u8 *m;
170 int ret = 0;
171
172 if (is_zero_ether_addr(local->hw.wiphy->addr_mask))
173 return 0;
174
175 m = addr;
176 new = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) |
177 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) |
178 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8);
179
180 m = local->hw.wiphy->addr_mask;
181 mask = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) |
182 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) |
183 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8);
184
185 if (!check_dup)
186 return ret;
187
188 mutex_lock(&local->iflist_mtx);
189 list_for_each_entry(iter, &local->interfaces, list) {
190 if (iter == sdata)
191 continue;
192
193 if (iter->vif.type == NL80211_IFTYPE_MONITOR &&
194 !(iter->u.mntr.flags & MONITOR_FLAG_ACTIVE))
195 continue;
196
197 m = iter->vif.addr;
198 tmp = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) |
199 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) |
200 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8);
201
202 if ((new & ~mask) != (tmp & ~mask)) {
203 ret = -EINVAL;
204 break;
205 }
206 }
207 mutex_unlock(&local->iflist_mtx);
208
209 return ret;
210 }
211
ieee80211_change_mac(struct net_device * dev,void * addr)212 static int ieee80211_change_mac(struct net_device *dev, void *addr)
213 {
214 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
215 struct sockaddr *sa = addr;
216 bool check_dup = true;
217 int ret;
218
219 if (ieee80211_sdata_running(sdata))
220 return -EBUSY;
221
222 if (sdata->vif.type == NL80211_IFTYPE_MONITOR &&
223 !(sdata->u.mntr.flags & MONITOR_FLAG_ACTIVE))
224 check_dup = false;
225
226 ret = ieee80211_verify_mac(sdata, sa->sa_data, check_dup);
227 if (ret)
228 return ret;
229
230 #ifdef CONFIG_DRIVERS_HDF_XR829
231 ret = eth_mac_addr(sdata->dev, sa);
232 #else
233 ret = eth_mac_addr(dev, sa);
234 #endif
235
236 if (ret == 0)
237 memcpy(sdata->vif.addr, sa->sa_data, ETH_ALEN);
238
239 ret = drv_change_mac(sdata->local, sdata, sa);
240
241 return ret;
242 }
243
identical_mac_addr_allowed(int type1,int type2)244 static inline int identical_mac_addr_allowed(int type1, int type2)
245 {
246 return type1 == NL80211_IFTYPE_MONITOR ||
247 type2 == NL80211_IFTYPE_MONITOR ||
248 type1 == NL80211_IFTYPE_P2P_DEVICE ||
249 type2 == NL80211_IFTYPE_P2P_DEVICE ||
250 (type1 == NL80211_IFTYPE_AP && type2 == NL80211_IFTYPE_WDS) ||
251 (type1 == NL80211_IFTYPE_WDS &&
252 (type2 == NL80211_IFTYPE_WDS ||
253 type2 == NL80211_IFTYPE_AP)) ||
254 (type1 == NL80211_IFTYPE_AP && type2 == NL80211_IFTYPE_AP_VLAN) ||
255 (type1 == NL80211_IFTYPE_AP_VLAN &&
256 (type2 == NL80211_IFTYPE_AP ||
257 type2 == NL80211_IFTYPE_AP_VLAN));
258 }
259
ieee80211_check_concurrent_iface(struct ieee80211_sub_if_data * sdata,enum nl80211_iftype iftype)260 static int ieee80211_check_concurrent_iface(struct ieee80211_sub_if_data *sdata,
261 enum nl80211_iftype iftype)
262 {
263 struct ieee80211_local *local = sdata->local;
264 struct ieee80211_sub_if_data *nsdata;
265 int ret;
266
267 ASSERT_RTNL();
268
269 /* we hold the RTNL here so can safely walk the list */
270 list_for_each_entry(nsdata, &local->interfaces, list) {
271 if (nsdata != sdata && ieee80211_sdata_running(nsdata)) {
272 /*
273 * Only OCB and monitor mode may coexist
274 */
275 if ((sdata->vif.type == NL80211_IFTYPE_OCB &&
276 nsdata->vif.type != NL80211_IFTYPE_MONITOR) ||
277 (sdata->vif.type != NL80211_IFTYPE_MONITOR &&
278 nsdata->vif.type == NL80211_IFTYPE_OCB))
279 return -EBUSY;
280
281 /*
282 * Allow only a single IBSS interface to be up at any
283 * time. This is restricted because beacon distribution
284 * cannot work properly if both are in the same IBSS.
285 *
286 * To remove this restriction we'd have to disallow them
287 * from setting the same SSID on different IBSS interfaces
288 * belonging to the same hardware. Then, however, we're
289 * faced with having to adopt two different TSF timers...
290 */
291 if (iftype == NL80211_IFTYPE_ADHOC &&
292 nsdata->vif.type == NL80211_IFTYPE_ADHOC)
293 return -EBUSY;
294 /*
295 * will not add another interface while any channel
296 * switch is active.
297 */
298 if (nsdata->vif.csa_active)
299 return -EBUSY;
300
301 /*
302 * The remaining checks are only performed for interfaces
303 * with the same MAC address.
304 */
305 if (!ether_addr_equal(sdata->vif.addr,
306 nsdata->vif.addr))
307 continue;
308
309 /*
310 * check whether it may have the same address
311 */
312 if (!identical_mac_addr_allowed(iftype,
313 nsdata->vif.type))
314 return -ENOTUNIQ;
315
316 /*
317 * can only add VLANs to enabled APs
318 */
319 if (iftype == NL80211_IFTYPE_AP_VLAN &&
320 nsdata->vif.type == NL80211_IFTYPE_AP)
321 sdata->bss = &nsdata->u.ap;
322 }
323 }
324
325 mutex_lock(&local->chanctx_mtx);
326 ret = ieee80211_check_combinations(sdata, NULL, 0, 0);
327 mutex_unlock(&local->chanctx_mtx);
328 return ret;
329 }
330
ieee80211_check_queues(struct ieee80211_sub_if_data * sdata,enum nl80211_iftype iftype)331 static int ieee80211_check_queues(struct ieee80211_sub_if_data *sdata,
332 enum nl80211_iftype iftype)
333 {
334 int n_queues = sdata->local->hw.queues;
335 int i;
336
337 if (iftype == NL80211_IFTYPE_NAN)
338 return 0;
339
340 if (iftype != NL80211_IFTYPE_P2P_DEVICE) {
341 for (i = 0; i < IEEE80211_NUM_ACS; i++) {
342 if (WARN_ON_ONCE(sdata->vif.hw_queue[i] ==
343 IEEE80211_INVAL_HW_QUEUE))
344 return -EINVAL;
345 if (WARN_ON_ONCE(sdata->vif.hw_queue[i] >=
346 n_queues))
347 return -EINVAL;
348 }
349 }
350
351 if ((iftype != NL80211_IFTYPE_AP &&
352 iftype != NL80211_IFTYPE_P2P_GO &&
353 iftype != NL80211_IFTYPE_MESH_POINT) ||
354 !ieee80211_hw_check(&sdata->local->hw, QUEUE_CONTROL)) {
355 sdata->vif.cab_queue = IEEE80211_INVAL_HW_QUEUE;
356 return 0;
357 }
358
359 if (WARN_ON_ONCE(sdata->vif.cab_queue == IEEE80211_INVAL_HW_QUEUE))
360 return -EINVAL;
361
362 if (WARN_ON_ONCE(sdata->vif.cab_queue >= n_queues))
363 return -EINVAL;
364
365 return 0;
366 }
367
ieee80211_adjust_monitor_flags(struct ieee80211_sub_if_data * sdata,const int offset)368 void ieee80211_adjust_monitor_flags(struct ieee80211_sub_if_data *sdata,
369 const int offset)
370 {
371 struct ieee80211_local *local = sdata->local;
372 u32 flags = sdata->u.mntr.flags;
373
374 #define ADJUST(_f, _s) do { \
375 if (flags & MONITOR_FLAG_##_f) \
376 local->fif_##_s += offset; \
377 } while (0)
378
379 ADJUST(FCSFAIL, fcsfail);
380 ADJUST(PLCPFAIL, plcpfail);
381 ADJUST(CONTROL, control);
382 ADJUST(CONTROL, pspoll);
383 ADJUST(OTHER_BSS, other_bss);
384
385 #undef ADJUST
386 }
387
ieee80211_set_default_queues(struct ieee80211_sub_if_data * sdata)388 static void ieee80211_set_default_queues(struct ieee80211_sub_if_data *sdata)
389 {
390 struct ieee80211_local *local = sdata->local;
391 int i;
392
393 for (i = 0; i < IEEE80211_NUM_ACS; i++) {
394 if (ieee80211_hw_check(&local->hw, QUEUE_CONTROL))
395 sdata->vif.hw_queue[i] = IEEE80211_INVAL_HW_QUEUE;
396 else if (local->hw.queues >= IEEE80211_NUM_ACS)
397 sdata->vif.hw_queue[i] = i;
398 else
399 sdata->vif.hw_queue[i] = 0;
400 }
401 sdata->vif.cab_queue = IEEE80211_INVAL_HW_QUEUE;
402 }
403
ieee80211_add_virtual_monitor(struct ieee80211_local * local)404 int ieee80211_add_virtual_monitor(struct ieee80211_local *local)
405 {
406 struct ieee80211_sub_if_data *sdata;
407 int ret;
408
409 if (!ieee80211_hw_check(&local->hw, WANT_MONITOR_VIF))
410 return 0;
411
412 ASSERT_RTNL();
413
414 if (local->monitor_sdata)
415 return 0;
416
417 sdata = kzalloc(sizeof(*sdata) + local->hw.vif_data_size, GFP_KERNEL);
418 if (!sdata)
419 return -ENOMEM;
420
421 /* set up data */
422 sdata->local = local;
423 sdata->vif.type = NL80211_IFTYPE_MONITOR;
424 snprintf(sdata->name, IFNAMSIZ, "%s-monitor",
425 wiphy_name(local->hw.wiphy));
426 sdata->wdev.iftype = NL80211_IFTYPE_MONITOR;
427
428 sdata->encrypt_headroom = IEEE80211_ENCRYPT_HEADROOM;
429
430 ieee80211_set_default_queues(sdata);
431
432 ret = drv_add_interface(local, sdata);
433 if (WARN_ON(ret)) {
434 /* ok .. stupid driver, it asked for this! */
435 kfree(sdata);
436 return ret;
437 }
438
439 ret = ieee80211_check_queues(sdata, NL80211_IFTYPE_MONITOR);
440 if (ret) {
441 kfree(sdata);
442 return ret;
443 }
444
445 mutex_lock(&local->iflist_mtx);
446 rcu_assign_pointer(local->monitor_sdata, sdata);
447 mutex_unlock(&local->iflist_mtx);
448
449 mutex_lock(&local->mtx);
450 ret = ieee80211_vif_use_channel(sdata, &local->monitor_chandef,
451 IEEE80211_CHANCTX_EXCLUSIVE);
452 mutex_unlock(&local->mtx);
453 if (ret) {
454 mutex_lock(&local->iflist_mtx);
455 RCU_INIT_POINTER(local->monitor_sdata, NULL);
456 mutex_unlock(&local->iflist_mtx);
457 synchronize_net();
458 drv_remove_interface(local, sdata);
459 kfree(sdata);
460 return ret;
461 }
462
463 skb_queue_head_init(&sdata->skb_queue);
464 INIT_WORK(&sdata->work, ieee80211_iface_work);
465
466 return 0;
467 }
468
ieee80211_del_virtual_monitor(struct ieee80211_local * local)469 void ieee80211_del_virtual_monitor(struct ieee80211_local *local)
470 {
471 struct ieee80211_sub_if_data *sdata;
472
473 if (!ieee80211_hw_check(&local->hw, WANT_MONITOR_VIF))
474 return;
475
476 ASSERT_RTNL();
477
478 mutex_lock(&local->iflist_mtx);
479
480 sdata = rcu_dereference_protected(local->monitor_sdata,
481 lockdep_is_held(&local->iflist_mtx));
482 if (!sdata) {
483 mutex_unlock(&local->iflist_mtx);
484 return;
485 }
486
487 RCU_INIT_POINTER(local->monitor_sdata, NULL);
488 mutex_unlock(&local->iflist_mtx);
489
490 synchronize_net();
491
492 mutex_lock(&local->mtx);
493 ieee80211_vif_release_channel(sdata);
494 mutex_unlock(&local->mtx);
495
496 drv_remove_interface(local, sdata);
497
498 kfree(sdata);
499 }
500
501 /*
502 * NOTE: Be very careful when changing this function, it must NOT return
503 * an error on interface type changes that have been pre-checked, so most
504 * checks should be in ieee80211_check_concurrent_iface.
505 */
ieee80211_do_open(struct wireless_dev * wdev,bool coming_up)506 int ieee80211_do_open(struct wireless_dev *wdev, bool coming_up)
507 {
508 #ifndef CONFIG_DRIVERS_HDF_XR829
509 struct ieee80211_sub_if_data *sdata = IEEE80211_WDEV_TO_SUB_IF(wdev);
510 #else
511 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(wdev->netdev);
512 #endif
513 struct net_device *dev = wdev->netdev;
514 struct ieee80211_local *local = sdata->local;
515 struct sta_info *sta;
516 u32 changed = 0;
517 int res;
518 u32 hw_reconf_flags = 0;
519
520 switch (sdata->vif.type) {
521 case NL80211_IFTYPE_WDS:
522 if (!is_valid_ether_addr(sdata->u.wds.remote_addr))
523 return -ENOLINK;
524 break;
525 case NL80211_IFTYPE_AP_VLAN: {
526 struct ieee80211_sub_if_data *master;
527
528 if (!sdata->bss)
529 return -ENOLINK;
530
531 mutex_lock(&local->mtx);
532 list_add(&sdata->u.vlan.list, &sdata->bss->vlans);
533 mutex_unlock(&local->mtx);
534
535 master = container_of(sdata->bss,
536 struct ieee80211_sub_if_data, u.ap);
537 sdata->control_port_protocol =
538 master->control_port_protocol;
539 sdata->control_port_no_encrypt =
540 master->control_port_no_encrypt;
541 sdata->control_port_over_nl80211 =
542 master->control_port_over_nl80211;
543 sdata->vif.cab_queue = master->vif.cab_queue;
544 memcpy(sdata->vif.hw_queue, master->vif.hw_queue,
545 sizeof(sdata->vif.hw_queue));
546 sdata->vif.bss_conf.chandef = master->vif.bss_conf.chandef;
547
548 mutex_lock(&local->key_mtx);
549 sdata->crypto_tx_tailroom_needed_cnt +=
550 master->crypto_tx_tailroom_needed_cnt;
551 mutex_unlock(&local->key_mtx);
552
553 break;
554 }
555 case NL80211_IFTYPE_AP:
556 sdata->bss = &sdata->u.ap;
557 break;
558 case NL80211_IFTYPE_MESH_POINT:
559 case NL80211_IFTYPE_STATION:
560 case NL80211_IFTYPE_MONITOR:
561 case NL80211_IFTYPE_ADHOC:
562 case NL80211_IFTYPE_P2P_DEVICE:
563 case NL80211_IFTYPE_OCB:
564 case NL80211_IFTYPE_NAN:
565 /* no special treatment */
566 break;
567 case NL80211_IFTYPE_UNSPECIFIED:
568 case NUM_NL80211_IFTYPES:
569 case NL80211_IFTYPE_P2P_CLIENT:
570 case NL80211_IFTYPE_P2P_GO:
571 /* cannot happen */
572 WARN_ON(1);
573 break;
574 }
575
576 if (local->open_count == 0) {
577 res = drv_start(local);
578 if (res)
579 goto err_del_bss;
580 /* we're brought up, everything changes */
581 hw_reconf_flags = ~0;
582 ieee80211_led_radio(local, true);
583 ieee80211_mod_tpt_led_trig(local,
584 IEEE80211_TPT_LEDTRIG_FL_RADIO, 0);
585 }
586
587 /*
588 * Copy the hopefully now-present MAC address to
589 * this interface, if it has the special null one.
590 */
591 if (dev && is_zero_ether_addr(dev->dev_addr)) {
592 memcpy(dev->dev_addr,
593 local->hw.wiphy->perm_addr,
594 ETH_ALEN);
595 memcpy(dev->perm_addr, dev->dev_addr, ETH_ALEN);
596
597 if (!is_valid_ether_addr(dev->dev_addr)) {
598 res = -EADDRNOTAVAIL;
599 goto err_stop;
600 }
601 }
602
603 switch (sdata->vif.type) {
604 case NL80211_IFTYPE_AP_VLAN:
605 /* no need to tell driver, but set carrier and chanctx */
606 if (rtnl_dereference(sdata->bss->beacon)) {
607 ieee80211_vif_vlan_copy_chanctx(sdata);
608 netif_carrier_on(dev);
609 } else {
610 netif_carrier_off(dev);
611 }
612 break;
613 case NL80211_IFTYPE_MONITOR:
614 if (sdata->u.mntr.flags & MONITOR_FLAG_COOK_FRAMES) {
615 local->cooked_mntrs++;
616 break;
617 }
618
619 if (sdata->u.mntr.flags & MONITOR_FLAG_ACTIVE) {
620 res = drv_add_interface(local, sdata);
621 if (res)
622 goto err_stop;
623 } else if (local->monitors == 0 && local->open_count == 0) {
624 res = ieee80211_add_virtual_monitor(local);
625 if (res)
626 goto err_stop;
627 }
628
629 /* must be before the call to ieee80211_configure_filter */
630 local->monitors++;
631 if (local->monitors == 1) {
632 local->hw.conf.flags |= IEEE80211_CONF_MONITOR;
633 hw_reconf_flags |= IEEE80211_CONF_CHANGE_MONITOR;
634 }
635
636 ieee80211_adjust_monitor_flags(sdata, 1);
637 ieee80211_configure_filter(sdata);
638 mutex_lock(&local->mtx);
639 ieee80211_recalc_idle(local);
640 mutex_unlock(&local->mtx);
641
642 netif_carrier_on(dev);
643 break;
644 default:
645 if (coming_up) {
646 ieee80211_del_virtual_monitor(local);
647
648 res = drv_add_interface(local, sdata);
649 if (res)
650 goto err_stop;
651 res = ieee80211_check_queues(sdata,
652 ieee80211_vif_type_p2p(&sdata->vif));
653 if (res)
654 goto err_del_interface;
655 }
656
657 if (sdata->vif.type == NL80211_IFTYPE_AP) {
658 local->fif_pspoll++;
659 local->fif_probe_req++;
660
661 ieee80211_configure_filter(sdata);
662 } else if (sdata->vif.type == NL80211_IFTYPE_ADHOC) {
663 local->fif_probe_req++;
664 }
665
666 if (sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE &&
667 sdata->vif.type != NL80211_IFTYPE_NAN)
668 changed |= ieee80211_reset_erp_info(sdata);
669 ieee80211_bss_info_change_notify(sdata, changed);
670
671 switch (sdata->vif.type) {
672 case NL80211_IFTYPE_STATION:
673 case NL80211_IFTYPE_ADHOC:
674 case NL80211_IFTYPE_AP:
675 case NL80211_IFTYPE_MESH_POINT:
676 case NL80211_IFTYPE_OCB:
677 netif_carrier_off(dev);
678 break;
679 case NL80211_IFTYPE_WDS:
680 case NL80211_IFTYPE_P2P_DEVICE:
681 case NL80211_IFTYPE_NAN:
682 break;
683 default:
684 /* not reached */
685 WARN_ON(1);
686 }
687
688 /*
689 * Set default queue parameters so drivers don't
690 * need to initialise the hardware if the hardware
691 * doesn't start up with sane defaults.
692 * Enable QoS for anything but station interfaces.
693 */
694 ieee80211_set_wmm_default(sdata, true,
695 sdata->vif.type != NL80211_IFTYPE_STATION);
696 }
697
698 set_bit(SDATA_STATE_RUNNING, &sdata->state);
699
700 switch (sdata->vif.type) {
701 case NL80211_IFTYPE_WDS:
702 /* Create STA entry for the WDS peer */
703 sta = sta_info_alloc(sdata, sdata->u.wds.remote_addr,
704 GFP_KERNEL);
705 if (!sta) {
706 res = -ENOMEM;
707 goto err_del_interface;
708 }
709
710 sta_info_pre_move_state(sta, IEEE80211_STA_AUTH);
711 sta_info_pre_move_state(sta, IEEE80211_STA_ASSOC);
712 sta_info_pre_move_state(sta, IEEE80211_STA_AUTHORIZED);
713
714 res = sta_info_insert(sta);
715 if (res) {
716 /* STA has been freed */
717 goto err_del_interface;
718 }
719
720 rate_control_rate_init(sta);
721 netif_carrier_on(dev);
722 break;
723 case NL80211_IFTYPE_P2P_DEVICE:
724 rcu_assign_pointer(local->p2p_sdata, sdata);
725 break;
726 case NL80211_IFTYPE_MONITOR:
727 if (sdata->u.mntr.flags & MONITOR_FLAG_COOK_FRAMES)
728 break;
729 list_add_tail_rcu(&sdata->u.mntr.list, &local->mon_list);
730 break;
731 default:
732 break;
733 }
734
735 /*
736 * set_multicast_list will be invoked by the networking core
737 * which will check whether any increments here were done in
738 * error and sync them down to the hardware as filter flags.
739 */
740 if (sdata->flags & IEEE80211_SDATA_ALLMULTI)
741 atomic_inc(&local->iff_allmultis);
742
743 if (coming_up)
744 local->open_count++;
745
746 if (hw_reconf_flags)
747 ieee80211_hw_config(local, hw_reconf_flags);
748
749 ieee80211_recalc_ps(local);
750
751 if (sdata->vif.type == NL80211_IFTYPE_MONITOR ||
752 sdata->vif.type == NL80211_IFTYPE_AP_VLAN ||
753 local->ops->wake_tx_queue) {
754 /* XXX: for AP_VLAN, actually track AP queues */
755 if (dev)
756 netif_tx_start_all_queues(dev);
757 } else if (dev) {
758 unsigned long flags;
759 int n_acs = IEEE80211_NUM_ACS;
760 int ac;
761
762 if (local->hw.queues < IEEE80211_NUM_ACS)
763 n_acs = 1;
764
765 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
766 if (sdata->vif.cab_queue == IEEE80211_INVAL_HW_QUEUE ||
767 (local->queue_stop_reasons[sdata->vif.cab_queue] == 0 &&
768 skb_queue_empty(&local->pending[sdata->vif.cab_queue]))) {
769 for (ac = 0; ac < n_acs; ac++) {
770 int ac_queue = sdata->vif.hw_queue[ac];
771
772 if (local->queue_stop_reasons[ac_queue] == 0 &&
773 skb_queue_empty(&local->pending[ac_queue]))
774 netif_start_subqueue(dev, ac);
775 }
776 }
777 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
778 }
779
780 return 0;
781 err_del_interface:
782 drv_remove_interface(local, sdata);
783 err_stop:
784 if (!local->open_count)
785 drv_stop(local);
786 err_del_bss:
787 sdata->bss = NULL;
788 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
789 mutex_lock(&local->mtx);
790 list_del(&sdata->u.vlan.list);
791 mutex_unlock(&local->mtx);
792 }
793 /* might already be clear but that doesn't matter */
794 clear_bit(SDATA_STATE_RUNNING, &sdata->state);
795 return res;
796 }
797
ieee80211_open(struct net_device * dev)798 static int ieee80211_open(struct net_device *dev)
799 {
800 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
801 int err;
802
803 /* fail early if user set an invalid address */
804 #ifdef CONFIG_DRIVERS_HDF_XR829
805 if (!is_valid_ether_addr(sdata->dev->dev_addr))
806 #else
807 if (!is_valid_ether_addr(dev->dev_addr))
808 #endif
809 return -EADDRNOTAVAIL;
810
811 err = ieee80211_check_concurrent_iface(sdata, sdata->vif.type);
812 if (err)
813 return err;
814
815 return ieee80211_do_open(&sdata->wdev, true);
816 }
817
ieee80211_do_stop(struct ieee80211_sub_if_data * sdata,bool going_down)818 static void ieee80211_do_stop(struct ieee80211_sub_if_data *sdata,
819 bool going_down)
820 {
821 struct ieee80211_local *local = sdata->local;
822 unsigned long flags;
823 struct sk_buff *skb, *tmp;
824 u32 hw_reconf_flags = 0;
825 int i, flushed;
826 struct ps_data *ps;
827 struct cfg80211_chan_def chandef;
828 bool cancel_scan;
829 struct cfg80211_nan_func *func;
830
831 clear_bit(SDATA_STATE_RUNNING, &sdata->state);
832
833 cancel_scan = rcu_access_pointer(local->scan_sdata) == sdata;
834 if (cancel_scan)
835 ieee80211_scan_cancel(local);
836
837 /*
838 * Stop TX on this interface first.
839 */
840 if (sdata->dev)
841 netif_tx_stop_all_queues(sdata->dev);
842
843 ieee80211_roc_purge(local, sdata);
844
845 switch (sdata->vif.type) {
846 case NL80211_IFTYPE_STATION:
847 ieee80211_mgd_stop(sdata);
848 break;
849 case NL80211_IFTYPE_ADHOC:
850 ieee80211_ibss_stop(sdata);
851 break;
852 case NL80211_IFTYPE_AP:
853 cancel_work_sync(&sdata->u.ap.request_smps_work);
854 break;
855 case NL80211_IFTYPE_MONITOR:
856 if (sdata->u.mntr.flags & MONITOR_FLAG_COOK_FRAMES)
857 break;
858 list_del_rcu(&sdata->u.mntr.list);
859 break;
860 default:
861 break;
862 }
863
864 /*
865 * Remove all stations associated with this interface.
866 *
867 * This must be done before calling ops->remove_interface()
868 * because otherwise we can later invoke ops->sta_notify()
869 * whenever the STAs are removed, and that invalidates driver
870 * assumptions about always getting a vif pointer that is valid
871 * (because if we remove a STA after ops->remove_interface()
872 * the driver will have removed the vif info already!)
873 *
874 * In WDS mode a station must exist here and be flushed, for
875 * AP_VLANs stations may exist since there's nothing else that
876 * would have removed them, but in other modes there shouldn't
877 * be any stations.
878 */
879 flushed = sta_info_flush(sdata);
880 WARN_ON_ONCE(sdata->vif.type != NL80211_IFTYPE_AP_VLAN &&
881 ((sdata->vif.type != NL80211_IFTYPE_WDS && flushed > 0) ||
882 (sdata->vif.type == NL80211_IFTYPE_WDS && flushed != 1)));
883
884 /* don't count this interface for allmulti while it is down */
885 if (sdata->flags & IEEE80211_SDATA_ALLMULTI)
886 atomic_dec(&local->iff_allmultis);
887
888 if (sdata->vif.type == NL80211_IFTYPE_AP) {
889 local->fif_pspoll--;
890 local->fif_probe_req--;
891 } else if (sdata->vif.type == NL80211_IFTYPE_ADHOC) {
892 local->fif_probe_req--;
893 }
894
895 if (sdata->dev) {
896 netif_addr_lock_bh(sdata->dev);
897 spin_lock_bh(&local->filter_lock);
898 __hw_addr_unsync(&local->mc_list, &sdata->dev->mc,
899 sdata->dev->addr_len);
900 spin_unlock_bh(&local->filter_lock);
901 netif_addr_unlock_bh(sdata->dev);
902 }
903
904 del_timer_sync(&local->dynamic_ps_timer);
905 cancel_work_sync(&local->dynamic_ps_enable_work);
906
907 cancel_work_sync(&sdata->recalc_smps);
908 sdata_lock(sdata);
909 mutex_lock(&local->mtx);
910 sdata->vif.csa_active = false;
911 if (sdata->vif.type == NL80211_IFTYPE_STATION)
912 sdata->u.mgd.csa_waiting_bcn = false;
913 if (sdata->csa_block_tx) {
914 ieee80211_wake_vif_queues(local, sdata,
915 IEEE80211_QUEUE_STOP_REASON_CSA);
916 sdata->csa_block_tx = false;
917 }
918 mutex_unlock(&local->mtx);
919 sdata_unlock(sdata);
920
921 cancel_work_sync(&sdata->csa_finalize_work);
922
923 cancel_delayed_work_sync(&sdata->dfs_cac_timer_work);
924
925 if (sdata->wdev.cac_started) {
926 chandef = sdata->vif.bss_conf.chandef;
927 WARN_ON(local->suspended);
928 mutex_lock(&local->mtx);
929 ieee80211_vif_release_channel(sdata);
930 mutex_unlock(&local->mtx);
931 cfg80211_cac_event(sdata->dev, &chandef,
932 NL80211_RADAR_CAC_ABORTED,
933 GFP_KERNEL);
934 }
935
936 /* APs need special treatment */
937 if (sdata->vif.type == NL80211_IFTYPE_AP) {
938 struct ieee80211_sub_if_data *vlan, *tmpsdata;
939
940 /* down all dependent devices, that is VLANs */
941 list_for_each_entry_safe(vlan, tmpsdata, &sdata->u.ap.vlans,
942 u.vlan.list)
943 dev_close(vlan->dev);
944 WARN_ON(!list_empty(&sdata->u.ap.vlans));
945 } else if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
946 /* remove all packets in parent bc_buf pointing to this dev */
947 ps = &sdata->bss->ps;
948
949 spin_lock_irqsave(&ps->bc_buf.lock, flags);
950 skb_queue_walk_safe(&ps->bc_buf, skb, tmp) {
951 if (skb->dev == sdata->dev) {
952 __skb_unlink(skb, &ps->bc_buf);
953 local->total_ps_buffered--;
954 mac80211_free_txskb(&local->hw, skb);
955 }
956 }
957 spin_unlock_irqrestore(&ps->bc_buf.lock, flags);
958 }
959
960 if (going_down)
961 local->open_count--;
962
963 switch (sdata->vif.type) {
964 case NL80211_IFTYPE_AP_VLAN:
965 mutex_lock(&local->mtx);
966 list_del(&sdata->u.vlan.list);
967 mutex_unlock(&local->mtx);
968 RCU_INIT_POINTER(sdata->vif.chanctx_conf, NULL);
969 /* see comment in the default case below */
970 ieee80211_free_keys(sdata, true);
971 /* no need to tell driver */
972 break;
973 case NL80211_IFTYPE_MONITOR:
974 if (sdata->u.mntr.flags & MONITOR_FLAG_COOK_FRAMES) {
975 local->cooked_mntrs--;
976 break;
977 }
978
979 local->monitors--;
980 if (local->monitors == 0) {
981 local->hw.conf.flags &= ~IEEE80211_CONF_MONITOR;
982 hw_reconf_flags |= IEEE80211_CONF_CHANGE_MONITOR;
983 }
984
985 ieee80211_adjust_monitor_flags(sdata, -1);
986 break;
987 case NL80211_IFTYPE_NAN:
988 /* clean all the functions */
989 spin_lock_bh(&sdata->u.nan.func_lock);
990
991 idr_for_each_entry(&sdata->u.nan.function_inst_ids, func, i) {
992 idr_remove(&sdata->u.nan.function_inst_ids, i);
993 cfg80211_free_nan_func(func);
994 }
995 idr_destroy(&sdata->u.nan.function_inst_ids);
996
997 spin_unlock_bh(&sdata->u.nan.func_lock);
998 break;
999 case NL80211_IFTYPE_P2P_DEVICE:
1000 /* relies on synchronize_rcu() below */
1001 RCU_INIT_POINTER(local->p2p_sdata, NULL);
1002 /* fall through */
1003 default:
1004 cancel_work_sync(&sdata->work);
1005 /*
1006 * When we get here, the interface is marked down.
1007 * Free the remaining keys, if there are any
1008 * (which can happen in AP mode if userspace sets
1009 * keys before the interface is operating, and maybe
1010 * also in WDS mode)
1011 *
1012 * Force the key freeing to always synchronize_net()
1013 * to wait for the RX path in case it is using this
1014 * interface enqueuing frames at this very time on
1015 * another CPU.
1016 */
1017 ieee80211_free_keys(sdata, true);
1018 skb_queue_purge(&sdata->skb_queue);
1019 }
1020
1021 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
1022 for (i = 0; i < IEEE80211_MAX_QUEUES; i++) {
1023 skb_queue_walk_safe(&local->pending[i], skb, tmp) {
1024 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
1025 if (info->control.vif == &sdata->vif) {
1026 __skb_unlink(skb, &local->pending[i]);
1027 mac80211_free_txskb(&local->hw, skb);
1028 }
1029 }
1030 }
1031 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
1032
1033 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
1034 ieee80211_txq_remove_vlan(local, sdata);
1035
1036 sdata->bss = NULL;
1037
1038 if (local->open_count == 0)
1039 ieee80211_clear_tx_pending(local);
1040
1041 sdata->vif.bss_conf.beacon_int = 0;
1042
1043 /*
1044 * If the interface goes down while suspended, presumably because
1045 * the device was unplugged and that happens before our resume,
1046 * then the driver is already unconfigured and the remainder of
1047 * this function isn't needed.
1048 * XXX: what about WoWLAN? If the device has software state, e.g.
1049 * memory allocated, it might expect teardown commands from
1050 * mac80211 here?
1051 */
1052 if (local->suspended) {
1053 WARN_ON(local->wowlan);
1054 WARN_ON(rtnl_dereference(local->monitor_sdata));
1055 return;
1056 }
1057
1058 switch (sdata->vif.type) {
1059 case NL80211_IFTYPE_AP_VLAN:
1060 break;
1061 case NL80211_IFTYPE_MONITOR:
1062 if (local->monitors == 0)
1063 ieee80211_del_virtual_monitor(local);
1064
1065 mutex_lock(&local->mtx);
1066 ieee80211_recalc_idle(local);
1067 mutex_unlock(&local->mtx);
1068
1069 if (!(sdata->u.mntr.flags & MONITOR_FLAG_ACTIVE))
1070 break;
1071
1072 /* fall through */
1073 default:
1074 if (going_down)
1075 drv_remove_interface(local, sdata);
1076 }
1077
1078 ieee80211_recalc_ps(local);
1079
1080 if (cancel_scan)
1081 flush_delayed_work(&local->scan_work);
1082
1083 if (local->open_count == 0) {
1084 ieee80211_stop_device(local);
1085
1086 /* no reconfiguring after stop! */
1087 return;
1088 }
1089
1090 /* do after stop to avoid reconfiguring when we stop anyway */
1091 ieee80211_configure_filter(sdata);
1092 ieee80211_hw_config(local, hw_reconf_flags);
1093
1094 if (local->monitors == local->open_count)
1095 ieee80211_add_virtual_monitor(local);
1096 }
1097
ieee80211_stop(struct net_device * dev)1098 static int ieee80211_stop(struct net_device *dev)
1099 {
1100 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1101
1102 ieee80211_do_stop(sdata, true);
1103
1104 return 0;
1105 }
1106
ieee80211_set_multicast_list(struct net_device * dev)1107 static void ieee80211_set_multicast_list(struct net_device *dev)
1108 {
1109 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1110 struct ieee80211_local *local = sdata->local;
1111 int allmulti, sdata_allmulti;
1112
1113 #ifdef CONFIG_DRIVERS_HDF_XR829
1114 allmulti = !!(sdata->dev->flags & IFF_ALLMULTI);
1115 #else
1116 allmulti = !!(dev->flags & IFF_ALLMULTI);
1117 #endif
1118 sdata_allmulti = !!(sdata->flags & IEEE80211_SDATA_ALLMULTI);
1119
1120 if (allmulti != sdata_allmulti) {
1121 #ifdef CONFIG_DRIVERS_HDF_XR829
1122 if (sdata->dev->flags & IFF_ALLMULTI)
1123 #else
1124 if (dev->flags & IFF_ALLMULTI)
1125 #endif
1126 atomic_inc(&local->iff_allmultis);
1127 else
1128 atomic_dec(&local->iff_allmultis);
1129 sdata->flags ^= IEEE80211_SDATA_ALLMULTI;
1130 }
1131
1132 spin_lock_bh(&local->filter_lock);
1133 #ifdef CONFIG_DRIVERS_HDF_XR829
1134 __hw_addr_sync(&local->mc_list, &sdata->dev->mc, sdata->dev->addr_len);
1135 #else
1136 __hw_addr_sync(&local->mc_list, &dev->mc, dev->addr_len);
1137 #endif
1138 spin_unlock_bh(&local->filter_lock);
1139 mac80211_queue_work(&local->hw, &local->reconfig_filter);
1140 }
1141
1142 /*
1143 * Called when the netdev is removed or, by the code below, before
1144 * the interface type changes.
1145 */
ieee80211_teardown_sdata(struct ieee80211_sub_if_data * sdata)1146 static void ieee80211_teardown_sdata(struct ieee80211_sub_if_data *sdata)
1147 {
1148 int i;
1149
1150 /* free extra data */
1151 ieee80211_free_keys(sdata, false);
1152
1153 ieee80211_debugfs_remove_netdev(sdata);
1154
1155 for (i = 0; i < IEEE80211_FRAGMENT_MAX; i++)
1156 __skb_queue_purge(&sdata->fragments[i].skb_list);
1157 sdata->fragment_next = 0;
1158
1159 if (ieee80211_vif_is_mesh(&sdata->vif))
1160 ieee80211_mesh_teardown_sdata(sdata);
1161 }
1162
ieee80211_uninit(struct net_device * dev)1163 static void ieee80211_uninit(struct net_device *dev)
1164 {
1165 ieee80211_teardown_sdata(IEEE80211_DEV_TO_SUB_IF(dev));
1166 }
1167
ieee80211_netdev_select_queue(struct net_device * dev,struct sk_buff * skb,struct net_device * sb_dev)1168 static u16 ieee80211_netdev_select_queue(struct net_device *dev,
1169 struct sk_buff *skb,
1170 struct net_device *sb_dev)
1171 {
1172 return ieee80211_select_queue(IEEE80211_DEV_TO_SUB_IF(dev), skb);
1173 }
1174
1175 static void
1176 #ifdef CONFIG_DRIVERS_HDF_XR829
ieee80211_get_stats64(struct net_device * dev,struct net_device_stats * stats)1177 ieee80211_get_stats64(struct net_device *dev, struct net_device_stats *stats)
1178 #else
1179 ieee80211_get_stats64(struct net_device *dev, struct rtnl_link_stats64 *stats)
1180 #endif
1181 {
1182 int i;
1183
1184 for_each_possible_cpu(i) {
1185 const struct pcpu_sw_netstats *tstats;
1186 #ifdef CONFIG_DRIVERS_HDF_XR829
1187 unsigned long rx_packets, rx_bytes, tx_packets, tx_bytes;
1188 #else
1189 u64 rx_packets, rx_bytes, tx_packets, tx_bytes;
1190 #endif
1191 unsigned int start;
1192
1193 tstats = per_cpu_ptr(dev->tstats, i);
1194
1195 do {
1196 start = u64_stats_fetch_begin_irq(&tstats->syncp);
1197 #ifdef CONFIG_DRIVERS_HDF_XR829
1198 rx_packets = (unsigned long)tstats->rx_packets;
1199 tx_packets = (unsigned long)tstats->tx_packets;
1200 rx_bytes = (unsigned long)tstats->rx_bytes;
1201 tx_bytes = (unsigned long)tstats->tx_bytes;
1202 #else
1203 rx_packets = tstats->rx_packets;
1204 tx_packets = tstats->tx_packets;
1205 rx_bytes = tstats->rx_bytes;
1206 tx_bytes = tstats->tx_bytes;
1207 #endif
1208 } while (u64_stats_fetch_retry_irq(&tstats->syncp, start));
1209
1210 stats->rx_packets += rx_packets;
1211 stats->tx_packets += tx_packets;
1212 stats->rx_bytes += rx_bytes;
1213 stats->tx_bytes += tx_bytes;
1214 }
1215 }
1216
1217 #ifndef CONFIG_DRIVERS_HDF_XR829
1218 static const struct net_device_ops ieee80211_dataif_ops = {
1219 #else
1220 struct net_device_ops ieee80211_dataif_ops = {
1221 #endif
1222 .ndo_open = ieee80211_open,
1223 .ndo_stop = ieee80211_stop,
1224 .ndo_uninit = ieee80211_uninit,
1225 .ndo_start_xmit = ieee80211_subif_start_xmit,
1226 .ndo_set_rx_mode = ieee80211_set_multicast_list,
1227 .ndo_set_mac_address = ieee80211_change_mac,
1228 .ndo_select_queue = ieee80211_netdev_select_queue,
1229 .ndo_get_stats64 = ieee80211_get_stats64,
1230 };
1231
ieee80211_monitor_select_queue(struct net_device * dev,struct sk_buff * skb,struct net_device * sb_dev)1232 static u16 ieee80211_monitor_select_queue(struct net_device *dev,
1233 struct sk_buff *skb,
1234 struct net_device *sb_dev)
1235 {
1236 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1237 struct ieee80211_local *local = sdata->local;
1238 struct ieee80211_hdr *hdr;
1239 struct ieee80211_radiotap_header *rtap = (void *)skb->data;
1240
1241 if (local->hw.queues < IEEE80211_NUM_ACS)
1242 return 0;
1243
1244 if (skb->len < 4 ||
1245 skb->len < le16_to_cpu(rtap->it_len) + 2 /* frame control */)
1246 return 0; /* doesn't matter, frame will be dropped */
1247
1248 hdr = (void *)((u8 *)skb->data + le16_to_cpu(rtap->it_len));
1249
1250 return ieee80211_select_queue_80211(sdata, skb, hdr);
1251 }
1252
1253 static const struct net_device_ops ieee80211_monitorif_ops = {
1254 .ndo_open = ieee80211_open,
1255 .ndo_stop = ieee80211_stop,
1256 .ndo_uninit = ieee80211_uninit,
1257 .ndo_start_xmit = ieee80211_monitor_start_xmit,
1258 .ndo_set_rx_mode = ieee80211_set_multicast_list,
1259 .ndo_set_mac_address = ieee80211_change_mac,
1260 .ndo_select_queue = ieee80211_monitor_select_queue,
1261 .ndo_get_stats64 = ieee80211_get_stats64,
1262 };
1263
ieee80211_if_free(struct net_device * dev)1264 static void ieee80211_if_free(struct net_device *dev)
1265 {
1266 free_percpu(dev->tstats);
1267 }
1268
1269 #ifndef CONFIG_DRIVERS_HDF_XR829
ieee80211_if_setup(struct net_device * dev)1270 static void ieee80211_if_setup(struct net_device *dev)
1271 {
1272 ether_setup(dev);
1273 dev->priv_flags &= ~IFF_TX_SKB_SHARING;
1274 dev->netdev_ops = &ieee80211_dataif_ops;
1275 dev->needs_free_netdev = true;
1276 dev->priv_destructor = ieee80211_if_free;
1277 }
1278
ieee80211_if_setup_no_queue(struct net_device * dev)1279 static void ieee80211_if_setup_no_queue(struct net_device *dev)
1280 {
1281 ieee80211_if_setup(dev);
1282 dev->priv_flags |= IFF_NO_QUEUE;
1283 }
1284 #endif
1285
ieee80211_iface_work(struct work_struct * work)1286 static void ieee80211_iface_work(struct work_struct *work)
1287 {
1288 struct ieee80211_sub_if_data *sdata =
1289 container_of(work, struct ieee80211_sub_if_data, work);
1290 struct ieee80211_local *local = sdata->local;
1291 struct sk_buff *skb;
1292 struct sta_info *sta;
1293
1294 if (!ieee80211_sdata_running(sdata))
1295 return;
1296
1297 if (test_bit(SCAN_SW_SCANNING, &local->scanning))
1298 return;
1299
1300 if (!ieee80211_can_run_worker(local))
1301 return;
1302
1303 /* first process frames */
1304 while ((skb = skb_dequeue(&sdata->skb_queue))) {
1305 struct ieee80211_mgmt *mgmt = (void *)skb->data;
1306
1307 if (ieee80211_is_action(mgmt->frame_control) &&
1308 mgmt->u.action.category == WLAN_CATEGORY_BACK) {
1309 int len = skb->len;
1310
1311 mutex_lock(&local->sta_mtx);
1312 sta = sta_info_get_bss(sdata, mgmt->sa);
1313 if (sta) {
1314 switch (mgmt->u.action.u.addba_req.action_code) {
1315 case WLAN_ACTION_ADDBA_REQ:
1316 ieee80211_process_addba_request(
1317 local, sta, mgmt, len);
1318 break;
1319 case WLAN_ACTION_ADDBA_RESP:
1320 ieee80211_process_addba_resp(local, sta,
1321 mgmt, len);
1322 break;
1323 case WLAN_ACTION_DELBA:
1324 ieee80211_process_delba(sdata, sta,
1325 mgmt, len);
1326 break;
1327 default:
1328 WARN_ON(1);
1329 break;
1330 }
1331 }
1332 mutex_unlock(&local->sta_mtx);
1333 } else if (ieee80211_is_action(mgmt->frame_control) &&
1334 mgmt->u.action.category == WLAN_CATEGORY_VHT) {
1335 switch (mgmt->u.action.u.vht_group_notif.action_code) {
1336 case WLAN_VHT_ACTION_OPMODE_NOTIF: {
1337 struct ieee80211_rx_status *status;
1338 enum nl80211_band band;
1339 u8 opmode;
1340
1341 status = IEEE80211_SKB_RXCB(skb);
1342 band = status->band;
1343 opmode = mgmt->u.action.u.vht_opmode_notif.operating_mode;
1344
1345 mutex_lock(&local->sta_mtx);
1346 sta = sta_info_get_bss(sdata, mgmt->sa);
1347
1348 if (sta)
1349 ieee80211_vht_handle_opmode(sdata, sta,
1350 opmode,
1351 band);
1352
1353 mutex_unlock(&local->sta_mtx);
1354 break;
1355 }
1356 case WLAN_VHT_ACTION_GROUPID_MGMT:
1357 ieee80211_process_mu_groups(sdata, mgmt);
1358 break;
1359 default:
1360 WARN_ON(1);
1361 break;
1362 }
1363 } else if (ieee80211_is_data_qos(mgmt->frame_control)) {
1364 struct ieee80211_hdr *hdr = (void *)mgmt;
1365 /*
1366 * So the frame isn't mgmt, but frame_control
1367 * is at the right place anyway, of course, so
1368 * the if statement is correct.
1369 *
1370 * Warn if we have other data frame types here,
1371 * they must not get here.
1372 */
1373 WARN_ON(hdr->frame_control &
1374 cpu_to_le16(IEEE80211_STYPE_NULLFUNC));
1375 WARN_ON(!(hdr->seq_ctrl &
1376 cpu_to_le16(IEEE80211_SCTL_FRAG)));
1377 /*
1378 * This was a fragment of a frame, received while
1379 * a block-ack session was active. That cannot be
1380 * right, so terminate the session.
1381 */
1382 mutex_lock(&local->sta_mtx);
1383 sta = sta_info_get_bss(sdata, mgmt->sa);
1384 if (sta) {
1385 u16 tid = ieee80211_get_tid(hdr);
1386
1387 __ieee80211_stop_rx_ba_session(
1388 sta, tid, WLAN_BACK_RECIPIENT,
1389 WLAN_REASON_QSTA_REQUIRE_SETUP,
1390 true);
1391 }
1392 mutex_unlock(&local->sta_mtx);
1393 } else {
1394 switch (sdata->vif.type) {
1395 case NL80211_IFTYPE_STATION:
1396 ieee80211_sta_rx_queued_mgmt(sdata, skb);
1397 break;
1398 case NL80211_IFTYPE_ADHOC:
1399 ieee80211_ibss_rx_queued_mgmt(sdata, skb);
1400 break;
1401 case NL80211_IFTYPE_MESH_POINT:
1402 if (!ieee80211_vif_is_mesh(&sdata->vif))
1403 break;
1404 ieee80211_mesh_rx_queued_mgmt(sdata, skb);
1405 break;
1406 default:
1407 WARN(1, "frame for unexpected interface type");
1408 break;
1409 }
1410 }
1411
1412 kfree_skb(skb);
1413 }
1414
1415 /* then other type-dependent work */
1416 switch (sdata->vif.type) {
1417 case NL80211_IFTYPE_STATION:
1418 ieee80211_sta_work(sdata);
1419 break;
1420 case NL80211_IFTYPE_ADHOC:
1421 ieee80211_ibss_work(sdata);
1422 break;
1423 case NL80211_IFTYPE_MESH_POINT:
1424 if (!ieee80211_vif_is_mesh(&sdata->vif))
1425 break;
1426 ieee80211_mesh_work(sdata);
1427 break;
1428 case NL80211_IFTYPE_OCB:
1429 ieee80211_ocb_work(sdata);
1430 break;
1431 default:
1432 break;
1433 }
1434 }
1435
ieee80211_recalc_smps_work(struct work_struct * work)1436 static void ieee80211_recalc_smps_work(struct work_struct *work)
1437 {
1438 struct ieee80211_sub_if_data *sdata =
1439 container_of(work, struct ieee80211_sub_if_data, recalc_smps);
1440
1441 ieee80211_recalc_smps(sdata);
1442 }
1443
1444 /*
1445 * Helper function to initialise an interface to a specific type.
1446 */
ieee80211_setup_sdata(struct ieee80211_sub_if_data * sdata,enum nl80211_iftype type)1447 static void ieee80211_setup_sdata(struct ieee80211_sub_if_data *sdata,
1448 enum nl80211_iftype type)
1449 {
1450 static const u8 bssid_wildcard[ETH_ALEN] = {0xff, 0xff, 0xff,
1451 0xff, 0xff, 0xff};
1452
1453 /* clear type-dependent union */
1454 memset(&sdata->u, 0, sizeof(sdata->u));
1455
1456 /* and set some type-dependent values */
1457 sdata->vif.type = type;
1458 sdata->vif.p2p = false;
1459 sdata->wdev.iftype = type;
1460
1461 sdata->control_port_protocol = cpu_to_be16(ETH_P_PAE);
1462 sdata->control_port_no_encrypt = false;
1463 sdata->encrypt_headroom = IEEE80211_ENCRYPT_HEADROOM;
1464 sdata->vif.bss_conf.idle = true;
1465
1466 sdata->noack_map = 0;
1467
1468 #ifndef CONFIG_DRIVERS_HDF_XR829
1469 /* only monitor/p2p-device differ */
1470 if (sdata->dev) {
1471 sdata->dev->netdev_ops = &ieee80211_dataif_ops;
1472 sdata->dev->type = ARPHRD_ETHER;
1473 }
1474 #endif
1475
1476 skb_queue_head_init(&sdata->skb_queue);
1477 INIT_WORK(&sdata->work, ieee80211_iface_work);
1478 INIT_WORK(&sdata->recalc_smps, ieee80211_recalc_smps_work);
1479 INIT_WORK(&sdata->csa_finalize_work, ieee80211_csa_finalize_work);
1480 INIT_LIST_HEAD(&sdata->assigned_chanctx_list);
1481 INIT_LIST_HEAD(&sdata->reserved_chanctx_list);
1482
1483 switch (type) {
1484 case NL80211_IFTYPE_P2P_GO:
1485 type = NL80211_IFTYPE_AP;
1486 sdata->vif.type = type;
1487 sdata->vif.p2p = true;
1488 /* fall through */
1489 case NL80211_IFTYPE_AP:
1490 skb_queue_head_init(&sdata->u.ap.ps.bc_buf);
1491 INIT_LIST_HEAD(&sdata->u.ap.vlans);
1492 INIT_WORK(&sdata->u.ap.request_smps_work,
1493 ieee80211_request_smps_ap_work);
1494 sdata->vif.bss_conf.bssid = sdata->vif.addr;
1495 sdata->u.ap.req_smps = IEEE80211_SMPS_OFF;
1496 break;
1497 case NL80211_IFTYPE_P2P_CLIENT:
1498 type = NL80211_IFTYPE_STATION;
1499 sdata->vif.type = type;
1500 sdata->vif.p2p = true;
1501 /* fall through */
1502 case NL80211_IFTYPE_STATION:
1503 sdata->vif.bss_conf.bssid = sdata->u.mgd.bssid;
1504 ieee80211_sta_setup_sdata(sdata);
1505 break;
1506 case NL80211_IFTYPE_OCB:
1507 sdata->vif.bss_conf.bssid = bssid_wildcard;
1508 ieee80211_ocb_setup_sdata(sdata);
1509 break;
1510 case NL80211_IFTYPE_ADHOC:
1511 sdata->vif.bss_conf.bssid = sdata->u.ibss.bssid;
1512 ieee80211_ibss_setup_sdata(sdata);
1513 break;
1514 case NL80211_IFTYPE_MESH_POINT:
1515 if (ieee80211_vif_is_mesh(&sdata->vif))
1516 ieee80211_mesh_init_sdata(sdata);
1517 break;
1518 case NL80211_IFTYPE_MONITOR:
1519 #ifndef CONFIG_DRIVERS_HDF_XR829
1520 sdata->dev->type = ARPHRD_IEEE80211_RADIOTAP;
1521 sdata->dev->netdev_ops = &ieee80211_monitorif_ops;
1522 #endif
1523 sdata->u.mntr.flags = MONITOR_FLAG_CONTROL |
1524 MONITOR_FLAG_OTHER_BSS;
1525 break;
1526 case NL80211_IFTYPE_WDS:
1527 sdata->vif.bss_conf.bssid = NULL;
1528 break;
1529 case NL80211_IFTYPE_NAN:
1530 idr_init(&sdata->u.nan.function_inst_ids);
1531 spin_lock_init(&sdata->u.nan.func_lock);
1532 sdata->vif.bss_conf.bssid = sdata->vif.addr;
1533 break;
1534 case NL80211_IFTYPE_AP_VLAN:
1535 case NL80211_IFTYPE_P2P_DEVICE:
1536 sdata->vif.bss_conf.bssid = sdata->vif.addr;
1537 break;
1538 case NL80211_IFTYPE_UNSPECIFIED:
1539 case NUM_NL80211_IFTYPES:
1540 WARN_ON(1);
1541 break;
1542 }
1543
1544 ieee80211_debugfs_add_netdev(sdata);
1545 }
1546
ieee80211_runtime_change_iftype(struct ieee80211_sub_if_data * sdata,enum nl80211_iftype type)1547 static int ieee80211_runtime_change_iftype(struct ieee80211_sub_if_data *sdata,
1548 enum nl80211_iftype type)
1549 {
1550 struct ieee80211_local *local = sdata->local;
1551 int ret, err;
1552 enum nl80211_iftype internal_type = type;
1553 bool p2p = false;
1554
1555 ASSERT_RTNL();
1556
1557 if (!local->ops->change_interface)
1558 return -EBUSY;
1559
1560 switch (sdata->vif.type) {
1561 case NL80211_IFTYPE_AP:
1562 case NL80211_IFTYPE_STATION:
1563 case NL80211_IFTYPE_ADHOC:
1564 case NL80211_IFTYPE_OCB:
1565 /*
1566 * Could maybe also all others here?
1567 * Just not sure how that interacts
1568 * with the RX/config path e.g. for
1569 * mesh.
1570 */
1571 break;
1572 default:
1573 return -EBUSY;
1574 }
1575
1576 switch (type) {
1577 case NL80211_IFTYPE_AP:
1578 case NL80211_IFTYPE_STATION:
1579 case NL80211_IFTYPE_ADHOC:
1580 case NL80211_IFTYPE_OCB:
1581 /*
1582 * Could probably support everything
1583 * but WDS here (WDS do_open can fail
1584 * under memory pressure, which this
1585 * code isn't prepared to handle).
1586 */
1587 break;
1588 case NL80211_IFTYPE_P2P_CLIENT:
1589 p2p = true;
1590 internal_type = NL80211_IFTYPE_STATION;
1591 break;
1592 case NL80211_IFTYPE_P2P_GO:
1593 p2p = true;
1594 internal_type = NL80211_IFTYPE_AP;
1595 break;
1596 default:
1597 return -EBUSY;
1598 }
1599
1600 ret = ieee80211_check_concurrent_iface(sdata, internal_type);
1601 if (ret)
1602 return ret;
1603
1604 ieee80211_do_stop(sdata, false);
1605
1606 ieee80211_teardown_sdata(sdata);
1607
1608 ret = drv_change_interface(local, sdata, internal_type, p2p);
1609 if (ret)
1610 type = ieee80211_vif_type_p2p(&sdata->vif);
1611
1612 /*
1613 * Ignore return value here, there's not much we can do since
1614 * the driver changed the interface type internally already.
1615 * The warnings will hopefully make driver authors fix it :-)
1616 */
1617 ieee80211_check_queues(sdata, type);
1618
1619 ieee80211_setup_sdata(sdata, type);
1620
1621 err = ieee80211_do_open(&sdata->wdev, false);
1622 WARN(err, "type change: do_open returned %d", err);
1623
1624 return ret;
1625 }
1626
ieee80211_if_change_type(struct ieee80211_sub_if_data * sdata,enum nl80211_iftype type)1627 int ieee80211_if_change_type(struct ieee80211_sub_if_data *sdata,
1628 enum nl80211_iftype type)
1629 {
1630 int ret;
1631
1632 ASSERT_RTNL();
1633
1634 if (type == ieee80211_vif_type_p2p(&sdata->vif))
1635 return 0;
1636
1637 if (ieee80211_sdata_running(sdata)) {
1638 ret = ieee80211_runtime_change_iftype(sdata, type);
1639 if (ret)
1640 return ret;
1641 } else {
1642 /* Purge and reset type-dependent state. */
1643 ieee80211_teardown_sdata(sdata);
1644 ieee80211_setup_sdata(sdata, type);
1645 }
1646
1647 /* reset some values that shouldn't be kept across type changes */
1648 if (type == NL80211_IFTYPE_STATION)
1649 sdata->u.mgd.use_4addr = false;
1650
1651 return 0;
1652 }
1653
ieee80211_assign_perm_addr(struct ieee80211_local * local,u8 * perm_addr,enum nl80211_iftype type)1654 static void ieee80211_assign_perm_addr(struct ieee80211_local *local,
1655 u8 *perm_addr, enum nl80211_iftype type)
1656 {
1657 struct ieee80211_sub_if_data *sdata;
1658 u64 mask, start, addr, val, inc;
1659 u8 *m;
1660 u8 tmp_addr[ETH_ALEN];
1661 int i;
1662
1663 /* default ... something at least */
1664 memcpy(perm_addr, local->hw.wiphy->perm_addr, ETH_ALEN);
1665
1666 if (is_zero_ether_addr(local->hw.wiphy->addr_mask) &&
1667 local->hw.wiphy->n_addresses <= 1)
1668 return;
1669
1670 mutex_lock(&local->iflist_mtx);
1671
1672 switch (type) {
1673 case NL80211_IFTYPE_MONITOR:
1674 /* doesn't matter */
1675 break;
1676 case NL80211_IFTYPE_WDS:
1677 case NL80211_IFTYPE_AP_VLAN:
1678 /* match up with an AP interface */
1679 list_for_each_entry(sdata, &local->interfaces, list) {
1680 if (sdata->vif.type != NL80211_IFTYPE_AP)
1681 continue;
1682 memcpy(perm_addr, sdata->vif.addr, ETH_ALEN);
1683 break;
1684 }
1685 /* keep default if no AP interface present */
1686 break;
1687 case NL80211_IFTYPE_P2P_CLIENT:
1688 case NL80211_IFTYPE_P2P_GO:
1689 if (ieee80211_hw_check(&local->hw, P2P_DEV_ADDR_FOR_INTF)) {
1690 list_for_each_entry(sdata, &local->interfaces, list) {
1691 if (sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE)
1692 continue;
1693 if (!ieee80211_sdata_running(sdata))
1694 continue;
1695 memcpy(perm_addr, sdata->vif.addr, ETH_ALEN);
1696 goto out_unlock;
1697 }
1698 }
1699 /* fall through */
1700 default:
1701 /* assign a new address if possible -- try n_addresses first */
1702 for (i = 0; i < local->hw.wiphy->n_addresses; i++) {
1703 bool used = false;
1704
1705 list_for_each_entry(sdata, &local->interfaces, list) {
1706 if (ether_addr_equal(local->hw.wiphy->addresses[i].addr,
1707 sdata->vif.addr)) {
1708 used = true;
1709 break;
1710 }
1711 }
1712
1713 if (!used) {
1714 memcpy(perm_addr,
1715 local->hw.wiphy->addresses[i].addr,
1716 ETH_ALEN);
1717 break;
1718 }
1719 }
1720
1721 /* try mask if available */
1722 if (is_zero_ether_addr(local->hw.wiphy->addr_mask))
1723 break;
1724
1725 m = local->hw.wiphy->addr_mask;
1726 mask = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) |
1727 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) |
1728 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8);
1729
1730 if (__ffs64(mask) + hweight64(mask) != fls64(mask)) {
1731 /* not a contiguous mask ... not handled now! */
1732 pr_info("not contiguous\n");
1733 break;
1734 }
1735
1736 /*
1737 * Pick address of existing interface in case user changed
1738 * MAC address manually, default to perm_addr.
1739 */
1740 m = local->hw.wiphy->perm_addr;
1741 list_for_each_entry(sdata, &local->interfaces, list) {
1742 if (sdata->vif.type == NL80211_IFTYPE_MONITOR)
1743 continue;
1744 m = sdata->vif.addr;
1745 break;
1746 }
1747 start = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) |
1748 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) |
1749 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8);
1750
1751 inc = 1ULL<<__ffs64(mask);
1752 val = (start & mask);
1753 addr = (start & ~mask) | (val & mask);
1754 do {
1755 bool used = false;
1756
1757 tmp_addr[5] = addr >> 0*8;
1758 tmp_addr[4] = addr >> 1*8;
1759 tmp_addr[3] = addr >> 2*8;
1760 tmp_addr[2] = addr >> 3*8;
1761 tmp_addr[1] = addr >> 4*8;
1762 tmp_addr[0] = addr >> 5*8;
1763
1764 val += inc;
1765
1766 list_for_each_entry(sdata, &local->interfaces, list) {
1767 if (ether_addr_equal(tmp_addr, sdata->vif.addr)) {
1768 used = true;
1769 break;
1770 }
1771 }
1772
1773 if (!used) {
1774 memcpy(perm_addr, tmp_addr, ETH_ALEN);
1775 break;
1776 }
1777 addr = (start & ~mask) | (val & mask);
1778 } while (addr != start);
1779
1780 break;
1781 }
1782
1783 out_unlock:
1784 mutex_unlock(&local->iflist_mtx);
1785 }
1786
ieee80211_if_add(struct ieee80211_local * local,const char * name,unsigned char name_assign_type,struct wireless_dev ** new_wdev,enum nl80211_iftype type,struct vif_params * params)1787 int ieee80211_if_add(struct ieee80211_local *local, const char *name,
1788 unsigned char name_assign_type,
1789 struct wireless_dev **new_wdev, enum nl80211_iftype type,
1790 struct vif_params *params)
1791 {
1792 struct net_device *ndev = NULL;
1793 struct ieee80211_sub_if_data *sdata = NULL;
1794 struct txq_info *txqi;
1795 void (*if_setup)(struct net_device *dev);
1796 int ret, i;
1797 int txqs = 1;
1798
1799 ASSERT_RTNL();
1800
1801 if (type == NL80211_IFTYPE_P2P_DEVICE || type == NL80211_IFTYPE_NAN) {
1802 struct wireless_dev *wdev;
1803
1804 sdata = kzalloc(sizeof(*sdata) + local->hw.vif_data_size,
1805 GFP_KERNEL);
1806 if (!sdata)
1807 return -ENOMEM;
1808 wdev = &sdata->wdev;
1809
1810 sdata->dev = NULL;
1811 strlcpy(sdata->name, name, IFNAMSIZ);
1812 ieee80211_assign_perm_addr(local, wdev->address, type);
1813 memcpy(sdata->vif.addr, wdev->address, ETH_ALEN);
1814 } else {
1815 int size = ALIGN(sizeof(*sdata) + local->hw.vif_data_size,
1816 sizeof(void *));
1817 int txq_size = 0;
1818
1819 if (local->ops->wake_tx_queue &&
1820 type != NL80211_IFTYPE_AP_VLAN &&
1821 (type != NL80211_IFTYPE_MONITOR ||
1822 (params->flags & MONITOR_FLAG_ACTIVE)))
1823 txq_size += sizeof(struct txq_info) +
1824 local->hw.txq_data_size;
1825
1826 #ifndef CONFIG_DRIVERS_HDF_XR829
1827 if (local->ops->wake_tx_queue) {
1828 if_setup = ieee80211_if_setup_no_queue;
1829 } else {
1830 if_setup = ieee80211_if_setup;
1831 if (local->hw.queues >= IEEE80211_NUM_ACS)
1832 txqs = IEEE80211_NUM_ACS;
1833 }
1834
1835 ndev = alloc_netdev_mqs(size + txq_size,
1836 name, name_assign_type,
1837 if_setup, txqs, 1);
1838 #else
1839
1840 sdata = kzalloc(sizeof(*sdata) + local->hw.vif_data_size,
1841 GFP_KERNEL);
1842 if (!sdata)
1843 return -ENOMEM;
1844
1845 ndev = get_krn_netdev();
1846 #endif
1847 if (!ndev)
1848 return -ENOMEM;
1849 dev_net_set(ndev, wiphy_net(local->hw.wiphy));
1850
1851 ndev->tstats = netdev_alloc_pcpu_stats(struct pcpu_sw_netstats);
1852 if (!ndev->tstats) {
1853 free_netdev(ndev);
1854 return -ENOMEM;
1855 }
1856
1857 ndev->needed_headroom = local->tx_headroom +
1858 4*6 /* four MAC addresses */
1859 + 2 + 2 + 2 + 2 /* ctl, dur, seq, qos */
1860 + 6 /* mesh */
1861 + 8 /* rfc1042/bridge tunnel */
1862 - ETH_HLEN /* ethernet hard_header_len */
1863 + IEEE80211_ENCRYPT_HEADROOM;
1864 ndev->needed_tailroom = IEEE80211_ENCRYPT_TAILROOM;
1865
1866 ret = dev_alloc_name(ndev, ndev->name);
1867 if (ret < 0) {
1868 ieee80211_if_free(ndev);
1869 free_netdev(ndev);
1870 return ret;
1871 }
1872
1873 #ifdef CONFIG_DRIVERS_HDF_XR829
1874 ndev->dev_addr = kzalloc((sizeof(unsigned char) * ETH_ALEN), GFP_KERNEL);
1875 if (!ndev->dev_addr)
1876 return -ENOMEM;
1877 #endif
1878 ieee80211_assign_perm_addr(local, ndev->perm_addr, type);
1879 if (is_valid_ether_addr(params->macaddr))
1880 memcpy(ndev->dev_addr, params->macaddr, ETH_ALEN);
1881 else
1882 memcpy(ndev->dev_addr, ndev->perm_addr, ETH_ALEN);
1883 SET_NETDEV_DEV(ndev, wiphy_dev(local->hw.wiphy));
1884
1885 /* don't use IEEE80211_DEV_TO_SUB_IF -- it checks too much */
1886 #ifndef CONFIG_DRIVERS_HDF_XR829
1887 sdata = netdev_priv(ndev);
1888 #endif
1889 ndev->ieee80211_ptr = &sdata->wdev;
1890 memcpy(sdata->vif.addr, ndev->dev_addr, ETH_ALEN);
1891 memcpy(sdata->name, ndev->name, IFNAMSIZ);
1892
1893 if (txq_size) {
1894 txqi = netdev_priv(ndev) + size;
1895 ieee80211_txq_init(sdata, NULL, txqi, 0);
1896 }
1897
1898 sdata->dev = ndev;
1899 }
1900
1901 /* initialise type-independent data */
1902 sdata->wdev.wiphy = local->hw.wiphy;
1903 sdata->local = local;
1904 #ifdef IPV6_FILTERING
1905 sdata->ndp_filter_state = true;
1906 #endif /*IPV6_FILTERING*/
1907
1908 for (i = 0; i < IEEE80211_FRAGMENT_MAX; i++)
1909 skb_queue_head_init(&sdata->fragments[i].skb_list);
1910
1911 INIT_LIST_HEAD(&sdata->key_list);
1912
1913 INIT_DELAYED_WORK(&sdata->dfs_cac_timer_work,
1914 ieee80211_dfs_cac_timer_work);
1915 INIT_DELAYED_WORK(&sdata->dec_tailroom_needed_wk,
1916 ieee80211_delayed_tailroom_dec);
1917
1918 for (i = 0; i < NUM_NL80211_BANDS; i++) {
1919 struct ieee80211_supported_band *sband;
1920 sband = local->hw.wiphy->bands[i];
1921 sdata->rc_rateidx_mask[i] =
1922 sband ? (1 << sband->n_bitrates) - 1 : 0;
1923 if (sband) {
1924 __le16 cap;
1925 u16 *vht_rate_mask;
1926
1927 memcpy(sdata->rc_rateidx_mcs_mask[i],
1928 sband->ht_cap.mcs.rx_mask,
1929 sizeof(sdata->rc_rateidx_mcs_mask[i]));
1930
1931 cap = sband->vht_cap.vht_mcs.rx_mcs_map;
1932 vht_rate_mask = sdata->rc_rateidx_vht_mcs_mask[i];
1933 ieee80211_get_vht_mask_from_cap(cap, vht_rate_mask);
1934 } else {
1935 memset(sdata->rc_rateidx_mcs_mask[i], 0,
1936 sizeof(sdata->rc_rateidx_mcs_mask[i]));
1937 memset(sdata->rc_rateidx_vht_mcs_mask[i], 0,
1938 sizeof(sdata->rc_rateidx_vht_mcs_mask[i]));
1939 }
1940 }
1941
1942 ieee80211_set_default_queues(sdata);
1943
1944 sdata->ap_power_level = IEEE80211_UNSET_POWER_LEVEL;
1945 sdata->user_power_level = local->user_power_level;
1946
1947 sdata->encrypt_headroom = IEEE80211_ENCRYPT_HEADROOM;
1948
1949 /* setup type-dependent data */
1950 ieee80211_setup_sdata(sdata, type);
1951
1952 if (ndev) {
1953 ndev->ieee80211_ptr->use_4addr = params->use_4addr;
1954 if (type == NL80211_IFTYPE_STATION)
1955 sdata->u.mgd.use_4addr = params->use_4addr;
1956
1957 ndev->features |= local->hw.netdev_features;
1958
1959 netdev_set_default_ethtool_ops(ndev, &ieee80211_ethtool_ops);
1960
1961 /* MTU range: 256 - 2304 */
1962 ndev->min_mtu = 256;
1963 ndev->max_mtu = local->hw.max_mtu;
1964
1965 #ifndef CONFIG_DRIVERS_HDF_XR829
1966 ret = register_netdevice(ndev);
1967 if (ret) {
1968 free_netdev(ndev);
1969 return ret;
1970 }
1971 #endif
1972 }
1973
1974 #ifdef CONFIG_DRIVERS_HDF_XR829
1975 g_hdf_sdata = sdata;
1976 #endif
1977 mutex_lock(&local->iflist_mtx);
1978 list_add_tail_rcu(&sdata->list, &local->interfaces);
1979 mutex_unlock(&local->iflist_mtx);
1980
1981 if (new_wdev)
1982 *new_wdev = &sdata->wdev;
1983
1984 return 0;
1985 }
1986
ieee80211_if_remove(struct ieee80211_sub_if_data * sdata)1987 void ieee80211_if_remove(struct ieee80211_sub_if_data *sdata)
1988 {
1989 ASSERT_RTNL();
1990
1991 mutex_lock(&sdata->local->iflist_mtx);
1992 list_del_rcu(&sdata->list);
1993 mutex_unlock(&sdata->local->iflist_mtx);
1994
1995 if (sdata->vif.txq)
1996 ieee80211_txq_purge(sdata->local, to_txq_info(sdata->vif.txq));
1997
1998 synchronize_rcu();
1999
2000 if (sdata->dev) {
2001 unregister_netdevice(sdata->dev);
2002 #ifdef CONFIG_DRIVERS_HDF_XR829
2003 kfree(sdata);
2004 #endif
2005 } else {
2006 cfg80211_unregister_wdev(&sdata->wdev);
2007 ieee80211_teardown_sdata(sdata);
2008 kfree(sdata);
2009 }
2010 }
2011
ieee80211_sdata_stop(struct ieee80211_sub_if_data * sdata)2012 void ieee80211_sdata_stop(struct ieee80211_sub_if_data *sdata)
2013 {
2014 if (WARN_ON_ONCE(!test_bit(SDATA_STATE_RUNNING, &sdata->state)))
2015 return;
2016 ieee80211_do_stop(sdata, true);
2017 }
2018
ieee80211_remove_interfaces(struct ieee80211_local * local)2019 void ieee80211_remove_interfaces(struct ieee80211_local *local)
2020 {
2021 struct ieee80211_sub_if_data *sdata, *tmp;
2022 LIST_HEAD(unreg_list);
2023 LIST_HEAD(wdev_list);
2024
2025 ASSERT_RTNL();
2026
2027 /* Before destroying the interfaces, make sure they're all stopped so
2028 * that the hardware is stopped. Otherwise, the driver might still be
2029 * iterating the interfaces during the shutdown, e.g. from a worker
2030 * or from RX processing or similar, and if it does so (using atomic
2031 * iteration) while we're manipulating the list, the iteration will
2032 * crash.
2033 *
2034 * After this, the hardware should be stopped and the driver should
2035 * have stopped all of its activities, so that we can do RCU-unaware
2036 * manipulations of the interface list below.
2037 */
2038 cfg80211_shutdown_all_interfaces(local->hw.wiphy);
2039
2040 WARN(local->open_count, "%s: open count remains %d\n",
2041 wiphy_name(local->hw.wiphy), local->open_count);
2042
2043 ieee80211_txq_teardown_flows(local);
2044
2045 mutex_lock(&local->iflist_mtx);
2046 list_for_each_entry_safe(sdata, tmp, &local->interfaces, list) {
2047 list_del(&sdata->list);
2048
2049 if (sdata->dev)
2050 unregister_netdevice_queue(sdata->dev, &unreg_list);
2051 else
2052 list_add(&sdata->list, &wdev_list);
2053 }
2054 mutex_unlock(&local->iflist_mtx);
2055 unregister_netdevice_many(&unreg_list);
2056
2057 list_for_each_entry_safe(sdata, tmp, &wdev_list, list) {
2058 list_del(&sdata->list);
2059 cfg80211_unregister_wdev(&sdata->wdev);
2060 kfree(sdata);
2061 }
2062 }
2063
netdev_notify(struct notifier_block * nb,unsigned long state,void * ptr)2064 static int netdev_notify(struct notifier_block *nb,
2065 unsigned long state, void *ptr)
2066 {
2067 struct net_device *dev = netdev_notifier_info_to_dev(ptr);
2068 struct ieee80211_sub_if_data *sdata;
2069
2070 if (state != NETDEV_CHANGENAME)
2071 return NOTIFY_DONE;
2072
2073 if (!dev->ieee80211_ptr || !dev->ieee80211_ptr->wiphy)
2074 return NOTIFY_DONE;
2075
2076 if (dev->ieee80211_ptr->wiphy->privid != mac80211_wiphy_privid)
2077 return NOTIFY_DONE;
2078
2079 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2080 memcpy(sdata->name, dev->name, IFNAMSIZ);
2081 ieee80211_debugfs_rename_netdev(sdata);
2082
2083 return NOTIFY_OK;
2084 }
2085
2086 static struct notifier_block mac80211_netdev_notifier = {
2087 .notifier_call = netdev_notify,
2088 };
2089
ieee80211_iface_init(void)2090 int ieee80211_iface_init(void)
2091 {
2092 return register_netdevice_notifier(&mac80211_netdev_notifier);
2093 }
2094
ieee80211_iface_exit(void)2095 void ieee80211_iface_exit(void)
2096 {
2097 unregister_netdevice_notifier(&mac80211_netdev_notifier);
2098 }
2099
ieee80211_vif_inc_num_mcast(struct ieee80211_sub_if_data * sdata)2100 void ieee80211_vif_inc_num_mcast(struct ieee80211_sub_if_data *sdata)
2101 {
2102 if (sdata->vif.type == NL80211_IFTYPE_AP)
2103 atomic_inc(&sdata->u.ap.num_mcast_sta);
2104 else if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
2105 atomic_inc(&sdata->u.vlan.num_mcast_sta);
2106 }
2107
ieee80211_vif_dec_num_mcast(struct ieee80211_sub_if_data * sdata)2108 void ieee80211_vif_dec_num_mcast(struct ieee80211_sub_if_data *sdata)
2109 {
2110 if (sdata->vif.type == NL80211_IFTYPE_AP)
2111 atomic_dec(&sdata->u.ap.num_mcast_sta);
2112 else if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
2113 atomic_dec(&sdata->u.vlan.num_mcast_sta);
2114 }
2115
2116 #ifdef CONFIG_DRIVERS_HDF_XR829
2117 EXPORT_SYMBOL(ieee80211_dataif_ops);
2118 EXPORT_SYMBOL(getDeviceSData);
2119 #endif
2120