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1/*
2 BlueZ - Bluetooth protocol stack for Linux
3 Copyright (C) 2000-2001 Qualcomm Incorporated
4 Copyright (C) 2011 ProFUSION Embedded Systems
5
6 Written 2000,2001 by Maxim Krasnyansky <maxk@qualcomm.com>
7
8 This program is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License version 2 as
10 published by the Free Software Foundation;
11
12 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
13 OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
14 FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT OF THIRD PARTY RIGHTS.
15 IN NO EVENT SHALL THE COPYRIGHT HOLDER(S) AND AUTHOR(S) BE LIABLE FOR ANY
16 CLAIM, OR ANY SPECIAL INDIRECT OR CONSEQUENTIAL DAMAGES, OR ANY DAMAGES
17 WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
18 ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
19 OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
20
21 ALL LIABILITY, INCLUDING LIABILITY FOR INFRINGEMENT OF ANY PATENTS,
22 COPYRIGHTS, TRADEMARKS OR OTHER RIGHTS, RELATING TO USE OF THIS
23 SOFTWARE IS DISCLAIMED.
24*/
25
26/* Bluetooth HCI core. */
27
28#include <linux/export.h>
29#include <linux/rfkill.h>
30#include <linux/debugfs.h>
31#include <linux/crypto.h>
32#include <linux/kcov.h>
33#include <linux/property.h>
34#include <linux/suspend.h>
35#include <linux/wait.h>
36#include <asm/unaligned.h>
37
38#include <net/bluetooth/bluetooth.h>
39#include <net/bluetooth/hci_core.h>
40#include <net/bluetooth/l2cap.h>
41#include <net/bluetooth/mgmt.h>
42
43#include "hci_request.h"
44#include "hci_debugfs.h"
45#include "smp.h"
46#include "leds.h"
47#include "msft.h"
48#include "aosp.h"
49#include "hci_codec.h"
50
51static void hci_rx_work(struct work_struct *work);
52static void hci_cmd_work(struct work_struct *work);
53static void hci_tx_work(struct work_struct *work);
54
55/* HCI device list */
56LIST_HEAD(hci_dev_list);
57DEFINE_RWLOCK(hci_dev_list_lock);
58
59/* HCI callback list */
60LIST_HEAD(hci_cb_list);
61DEFINE_MUTEX(hci_cb_list_lock);
62
63/* HCI ID Numbering */
64static DEFINE_IDA(hci_index_ida);
65
66static int hci_scan_req(struct hci_request *req, unsigned long opt)
67{
68 __u8 scan = opt;
69
70 BT_DBG("%s %x", req->hdev->name, scan);
71
72 /* Inquiry and Page scans */
73 hci_req_add(req, HCI_OP_WRITE_SCAN_ENABLE, 1, &scan);
74 return 0;
75}
76
77static int hci_auth_req(struct hci_request *req, unsigned long opt)
78{
79 __u8 auth = opt;
80
81 BT_DBG("%s %x", req->hdev->name, auth);
82
83 /* Authentication */
84 hci_req_add(req, HCI_OP_WRITE_AUTH_ENABLE, 1, &auth);
85 return 0;
86}
87
88static int hci_encrypt_req(struct hci_request *req, unsigned long opt)
89{
90 __u8 encrypt = opt;
91
92 BT_DBG("%s %x", req->hdev->name, encrypt);
93
94 /* Encryption */
95 hci_req_add(req, HCI_OP_WRITE_ENCRYPT_MODE, 1, &encrypt);
96 return 0;
97}
98
99static int hci_linkpol_req(struct hci_request *req, unsigned long opt)
100{
101 __le16 policy = cpu_to_le16(opt);
102
103 BT_DBG("%s %x", req->hdev->name, policy);
104
105 /* Default link policy */
106 hci_req_add(req, HCI_OP_WRITE_DEF_LINK_POLICY, 2, &policy);
107 return 0;
108}
109
110/* Get HCI device by index.
111 * Device is held on return. */
112struct hci_dev *hci_dev_get(int index)
113{
114 struct hci_dev *hdev = NULL, *d;
115
116 BT_DBG("%d", index);
117
118 if (index < 0)
119 return NULL;
120
121 read_lock(&hci_dev_list_lock);
122 list_for_each_entry(d, &hci_dev_list, list) {
123 if (d->id == index) {
124 hdev = hci_dev_hold(d);
125 break;
126 }
127 }
128 read_unlock(&hci_dev_list_lock);
129 return hdev;
130}
131
132/* ---- Inquiry support ---- */
133
134bool hci_discovery_active(struct hci_dev *hdev)
135{
136 struct discovery_state *discov = &hdev->discovery;
137
138 switch (discov->state) {
139 case DISCOVERY_FINDING:
140 case DISCOVERY_RESOLVING:
141 return true;
142
143 default:
144 return false;
145 }
146}
147
148void hci_discovery_set_state(struct hci_dev *hdev, int state)
149{
150 int old_state = hdev->discovery.state;
151
152 BT_DBG("%s state %u -> %u", hdev->name, hdev->discovery.state, state);
153
154 if (old_state == state)
155 return;
156
157 hdev->discovery.state = state;
158
159 switch (state) {
160 case DISCOVERY_STOPPED:
161 hci_update_passive_scan(hdev);
162
163 if (old_state != DISCOVERY_STARTING)
164 mgmt_discovering(hdev, 0);
165 break;
166 case DISCOVERY_STARTING:
167 break;
168 case DISCOVERY_FINDING:
169 mgmt_discovering(hdev, 1);
170 break;
171 case DISCOVERY_RESOLVING:
172 break;
173 case DISCOVERY_STOPPING:
174 break;
175 }
176}
177
178void hci_inquiry_cache_flush(struct hci_dev *hdev)
179{
180 struct discovery_state *cache = &hdev->discovery;
181 struct inquiry_entry *p, *n;
182
183 list_for_each_entry_safe(p, n, &cache->all, all) {
184 list_del(&p->all);
185 kfree(p);
186 }
187
188 INIT_LIST_HEAD(&cache->unknown);
189 INIT_LIST_HEAD(&cache->resolve);
190}
191
192struct inquiry_entry *hci_inquiry_cache_lookup(struct hci_dev *hdev,
193 bdaddr_t *bdaddr)
194{
195 struct discovery_state *cache = &hdev->discovery;
196 struct inquiry_entry *e;
197
198 BT_DBG("cache %p, %pMR", cache, bdaddr);
199
200 list_for_each_entry(e, &cache->all, all) {
201 if (!bacmp(&e->data.bdaddr, bdaddr))
202 return e;
203 }
204
205 return NULL;
206}
207
208struct inquiry_entry *hci_inquiry_cache_lookup_unknown(struct hci_dev *hdev,
209 bdaddr_t *bdaddr)
210{
211 struct discovery_state *cache = &hdev->discovery;
212 struct inquiry_entry *e;
213
214 BT_DBG("cache %p, %pMR", cache, bdaddr);
215
216 list_for_each_entry(e, &cache->unknown, list) {
217 if (!bacmp(&e->data.bdaddr, bdaddr))
218 return e;
219 }
220
221 return NULL;
222}
223
224struct inquiry_entry *hci_inquiry_cache_lookup_resolve(struct hci_dev *hdev,
225 bdaddr_t *bdaddr,
226 int state)
227{
228 struct discovery_state *cache = &hdev->discovery;
229 struct inquiry_entry *e;
230
231 BT_DBG("cache %p bdaddr %pMR state %d", cache, bdaddr, state);
232
233 list_for_each_entry(e, &cache->resolve, list) {
234 if (!bacmp(bdaddr, BDADDR_ANY) && e->name_state == state)
235 return e;
236 if (!bacmp(&e->data.bdaddr, bdaddr))
237 return e;
238 }
239
240 return NULL;
241}
242
243void hci_inquiry_cache_update_resolve(struct hci_dev *hdev,
244 struct inquiry_entry *ie)
245{
246 struct discovery_state *cache = &hdev->discovery;
247 struct list_head *pos = &cache->resolve;
248 struct inquiry_entry *p;
249
250 list_del(&ie->list);
251
252 list_for_each_entry(p, &cache->resolve, list) {
253 if (p->name_state != NAME_PENDING &&
254 abs(p->data.rssi) >= abs(ie->data.rssi))
255 break;
256 pos = &p->list;
257 }
258
259 list_add(&ie->list, pos);
260}
261
262u32 hci_inquiry_cache_update(struct hci_dev *hdev, struct inquiry_data *data,
263 bool name_known)
264{
265 struct discovery_state *cache = &hdev->discovery;
266 struct inquiry_entry *ie;
267 u32 flags = 0;
268
269 BT_DBG("cache %p, %pMR", cache, &data->bdaddr);
270
271 hci_remove_remote_oob_data(hdev, &data->bdaddr, BDADDR_BREDR);
272
273 if (!data->ssp_mode)
274 flags |= MGMT_DEV_FOUND_LEGACY_PAIRING;
275
276 ie = hci_inquiry_cache_lookup(hdev, &data->bdaddr);
277 if (ie) {
278 if (!ie->data.ssp_mode)
279 flags |= MGMT_DEV_FOUND_LEGACY_PAIRING;
280
281 if (ie->name_state == NAME_NEEDED &&
282 data->rssi != ie->data.rssi) {
283 ie->data.rssi = data->rssi;
284 hci_inquiry_cache_update_resolve(hdev, ie);
285 }
286
287 goto update;
288 }
289
290 /* Entry not in the cache. Add new one. */
291 ie = kzalloc(sizeof(*ie), GFP_KERNEL);
292 if (!ie) {
293 flags |= MGMT_DEV_FOUND_CONFIRM_NAME;
294 goto done;
295 }
296
297 list_add(&ie->all, &cache->all);
298
299 if (name_known) {
300 ie->name_state = NAME_KNOWN;
301 } else {
302 ie->name_state = NAME_NOT_KNOWN;
303 list_add(&ie->list, &cache->unknown);
304 }
305
306update:
307 if (name_known && ie->name_state != NAME_KNOWN &&
308 ie->name_state != NAME_PENDING) {
309 ie->name_state = NAME_KNOWN;
310 list_del(&ie->list);
311 }
312
313 memcpy(&ie->data, data, sizeof(*data));
314 ie->timestamp = jiffies;
315 cache->timestamp = jiffies;
316
317 if (ie->name_state == NAME_NOT_KNOWN)
318 flags |= MGMT_DEV_FOUND_CONFIRM_NAME;
319
320done:
321 return flags;
322}
323
324static int inquiry_cache_dump(struct hci_dev *hdev, int num, __u8 *buf)
325{
326 struct discovery_state *cache = &hdev->discovery;
327 struct inquiry_info *info = (struct inquiry_info *) buf;
328 struct inquiry_entry *e;
329 int copied = 0;
330
331 list_for_each_entry(e, &cache->all, all) {
332 struct inquiry_data *data = &e->data;
333
334 if (copied >= num)
335 break;
336
337 bacpy(&info->bdaddr, &data->bdaddr);
338 info->pscan_rep_mode = data->pscan_rep_mode;
339 info->pscan_period_mode = data->pscan_period_mode;
340 info->pscan_mode = data->pscan_mode;
341 memcpy(info->dev_class, data->dev_class, 3);
342 info->clock_offset = data->clock_offset;
343
344 info++;
345 copied++;
346 }
347
348 BT_DBG("cache %p, copied %d", cache, copied);
349 return copied;
350}
351
352static int hci_inq_req(struct hci_request *req, unsigned long opt)
353{
354 struct hci_inquiry_req *ir = (struct hci_inquiry_req *) opt;
355 struct hci_dev *hdev = req->hdev;
356 struct hci_cp_inquiry cp;
357
358 BT_DBG("%s", hdev->name);
359
360 if (test_bit(HCI_INQUIRY, &hdev->flags))
361 return 0;
362
363 /* Start Inquiry */
364 memcpy(&cp.lap, &ir->lap, 3);
365 cp.length = ir->length;
366 cp.num_rsp = ir->num_rsp;
367 hci_req_add(req, HCI_OP_INQUIRY, sizeof(cp), &cp);
368
369 return 0;
370}
371
372int hci_inquiry(void __user *arg)
373{
374 __u8 __user *ptr = arg;
375 struct hci_inquiry_req ir;
376 struct hci_dev *hdev;
377 int err = 0, do_inquiry = 0, max_rsp;
378 long timeo;
379 __u8 *buf;
380
381 if (copy_from_user(&ir, ptr, sizeof(ir)))
382 return -EFAULT;
383
384 hdev = hci_dev_get(ir.dev_id);
385 if (!hdev)
386 return -ENODEV;
387
388 if (hci_dev_test_flag(hdev, HCI_USER_CHANNEL)) {
389 err = -EBUSY;
390 goto done;
391 }
392
393 if (hci_dev_test_flag(hdev, HCI_UNCONFIGURED)) {
394 err = -EOPNOTSUPP;
395 goto done;
396 }
397
398 if (hdev->dev_type != HCI_PRIMARY) {
399 err = -EOPNOTSUPP;
400 goto done;
401 }
402
403 if (!hci_dev_test_flag(hdev, HCI_BREDR_ENABLED)) {
404 err = -EOPNOTSUPP;
405 goto done;
406 }
407
408 /* Restrict maximum inquiry length to 60 seconds */
409 if (ir.length > 60) {
410 err = -EINVAL;
411 goto done;
412 }
413
414 hci_dev_lock(hdev);
415 if (inquiry_cache_age(hdev) > INQUIRY_CACHE_AGE_MAX ||
416 inquiry_cache_empty(hdev) || ir.flags & IREQ_CACHE_FLUSH) {
417 hci_inquiry_cache_flush(hdev);
418 do_inquiry = 1;
419 }
420 hci_dev_unlock(hdev);
421
422 timeo = ir.length * msecs_to_jiffies(2000);
423
424 if (do_inquiry) {
425 err = hci_req_sync(hdev, hci_inq_req, (unsigned long) &ir,
426 timeo, NULL);
427 if (err < 0)
428 goto done;
429
430 /* Wait until Inquiry procedure finishes (HCI_INQUIRY flag is
431 * cleared). If it is interrupted by a signal, return -EINTR.
432 */
433 if (wait_on_bit(&hdev->flags, HCI_INQUIRY,
434 TASK_INTERRUPTIBLE)) {
435 err = -EINTR;
436 goto done;
437 }
438 }
439
440 /* for unlimited number of responses we will use buffer with
441 * 255 entries
442 */
443 max_rsp = (ir.num_rsp == 0) ? 255 : ir.num_rsp;
444
445 /* cache_dump can't sleep. Therefore we allocate temp buffer and then
446 * copy it to the user space.
447 */
448 buf = kmalloc_array(max_rsp, sizeof(struct inquiry_info), GFP_KERNEL);
449 if (!buf) {
450 err = -ENOMEM;
451 goto done;
452 }
453
454 hci_dev_lock(hdev);
455 ir.num_rsp = inquiry_cache_dump(hdev, max_rsp, buf);
456 hci_dev_unlock(hdev);
457
458 BT_DBG("num_rsp %d", ir.num_rsp);
459
460 if (!copy_to_user(ptr, &ir, sizeof(ir))) {
461 ptr += sizeof(ir);
462 if (copy_to_user(ptr, buf, sizeof(struct inquiry_info) *
463 ir.num_rsp))
464 err = -EFAULT;
465 } else
466 err = -EFAULT;
467
468 kfree(buf);
469
470done:
471 hci_dev_put(hdev);
472 return err;
473}
474
475static int hci_dev_do_open(struct hci_dev *hdev)
476{
477 int ret = 0;
478
479 BT_DBG("%s %p", hdev->name, hdev);
480
481 hci_req_sync_lock(hdev);
482
483 ret = hci_dev_open_sync(hdev);
484
485 hci_req_sync_unlock(hdev);
486 return ret;
487}
488
489/* ---- HCI ioctl helpers ---- */
490
491int hci_dev_open(__u16 dev)
492{
493 struct hci_dev *hdev;
494 int err;
495
496 hdev = hci_dev_get(dev);
497 if (!hdev)
498 return -ENODEV;
499
500 /* Devices that are marked as unconfigured can only be powered
501 * up as user channel. Trying to bring them up as normal devices
502 * will result into a failure. Only user channel operation is
503 * possible.
504 *
505 * When this function is called for a user channel, the flag
506 * HCI_USER_CHANNEL will be set first before attempting to
507 * open the device.
508 */
509 if (hci_dev_test_flag(hdev, HCI_UNCONFIGURED) &&
510 !hci_dev_test_flag(hdev, HCI_USER_CHANNEL)) {
511 err = -EOPNOTSUPP;
512 goto done;
513 }
514
515 /* We need to ensure that no other power on/off work is pending
516 * before proceeding to call hci_dev_do_open. This is
517 * particularly important if the setup procedure has not yet
518 * completed.
519 */
520 if (hci_dev_test_and_clear_flag(hdev, HCI_AUTO_OFF))
521 cancel_delayed_work(&hdev->power_off);
522
523 /* After this call it is guaranteed that the setup procedure
524 * has finished. This means that error conditions like RFKILL
525 * or no valid public or static random address apply.
526 */
527 flush_workqueue(hdev->req_workqueue);
528
529 /* For controllers not using the management interface and that
530 * are brought up using legacy ioctl, set the HCI_BONDABLE bit
531 * so that pairing works for them. Once the management interface
532 * is in use this bit will be cleared again and userspace has
533 * to explicitly enable it.
534 */
535 if (!hci_dev_test_flag(hdev, HCI_USER_CHANNEL) &&
536 !hci_dev_test_flag(hdev, HCI_MGMT))
537 hci_dev_set_flag(hdev, HCI_BONDABLE);
538
539 err = hci_dev_do_open(hdev);
540
541done:
542 hci_dev_put(hdev);
543 return err;
544}
545
546int hci_dev_do_close(struct hci_dev *hdev)
547{
548 int err;
549
550 BT_DBG("%s %p", hdev->name, hdev);
551
552 hci_req_sync_lock(hdev);
553
554 err = hci_dev_close_sync(hdev);
555
556 hci_req_sync_unlock(hdev);
557
558 return err;
559}
560
561int hci_dev_close(__u16 dev)
562{
563 struct hci_dev *hdev;
564 int err;
565
566 hdev = hci_dev_get(dev);
567 if (!hdev)
568 return -ENODEV;
569
570 if (hci_dev_test_flag(hdev, HCI_USER_CHANNEL)) {
571 err = -EBUSY;
572 goto done;
573 }
574
575 cancel_work_sync(&hdev->power_on);
576 if (hci_dev_test_and_clear_flag(hdev, HCI_AUTO_OFF))
577 cancel_delayed_work(&hdev->power_off);
578
579 err = hci_dev_do_close(hdev);
580
581done:
582 hci_dev_put(hdev);
583 return err;
584}
585
586static int hci_dev_do_reset(struct hci_dev *hdev)
587{
588 int ret;
589
590 BT_DBG("%s %p", hdev->name, hdev);
591
592 hci_req_sync_lock(hdev);
593
594 /* Drop queues */
595 skb_queue_purge(&hdev->rx_q);
596 skb_queue_purge(&hdev->cmd_q);
597
598 /* Cancel these to avoid queueing non-chained pending work */
599 hci_dev_set_flag(hdev, HCI_CMD_DRAIN_WORKQUEUE);
600 /* Wait for
601 *
602 * if (!hci_dev_test_flag(hdev, HCI_CMD_DRAIN_WORKQUEUE))
603 * queue_delayed_work(&hdev->{cmd,ncmd}_timer)
604 *
605 * inside RCU section to see the flag or complete scheduling.
606 */
607 synchronize_rcu();
608 /* Explicitly cancel works in case scheduled after setting the flag. */
609 cancel_delayed_work(&hdev->cmd_timer);
610 cancel_delayed_work(&hdev->ncmd_timer);
611
612 /* Avoid potential lockdep warnings from the *_flush() calls by
613 * ensuring the workqueue is empty up front.
614 */
615 drain_workqueue(hdev->workqueue);
616
617 hci_dev_lock(hdev);
618 hci_inquiry_cache_flush(hdev);
619 hci_conn_hash_flush(hdev);
620 hci_dev_unlock(hdev);
621
622 if (hdev->flush)
623 hdev->flush(hdev);
624
625 hci_dev_clear_flag(hdev, HCI_CMD_DRAIN_WORKQUEUE);
626
627 atomic_set(&hdev->cmd_cnt, 1);
628 hdev->acl_cnt = 0;
629 hdev->sco_cnt = 0;
630 hdev->le_cnt = 0;
631 hdev->iso_cnt = 0;
632
633 ret = hci_reset_sync(hdev);
634
635 hci_req_sync_unlock(hdev);
636 return ret;
637}
638
639int hci_dev_reset(__u16 dev)
640{
641 struct hci_dev *hdev;
642 int err;
643
644 hdev = hci_dev_get(dev);
645 if (!hdev)
646 return -ENODEV;
647
648 if (!test_bit(HCI_UP, &hdev->flags)) {
649 err = -ENETDOWN;
650 goto done;
651 }
652
653 if (hci_dev_test_flag(hdev, HCI_USER_CHANNEL)) {
654 err = -EBUSY;
655 goto done;
656 }
657
658 if (hci_dev_test_flag(hdev, HCI_UNCONFIGURED)) {
659 err = -EOPNOTSUPP;
660 goto done;
661 }
662
663 err = hci_dev_do_reset(hdev);
664
665done:
666 hci_dev_put(hdev);
667 return err;
668}
669
670int hci_dev_reset_stat(__u16 dev)
671{
672 struct hci_dev *hdev;
673 int ret = 0;
674
675 hdev = hci_dev_get(dev);
676 if (!hdev)
677 return -ENODEV;
678
679 if (hci_dev_test_flag(hdev, HCI_USER_CHANNEL)) {
680 ret = -EBUSY;
681 goto done;
682 }
683
684 if (hci_dev_test_flag(hdev, HCI_UNCONFIGURED)) {
685 ret = -EOPNOTSUPP;
686 goto done;
687 }
688
689 memset(&hdev->stat, 0, sizeof(struct hci_dev_stats));
690
691done:
692 hci_dev_put(hdev);
693 return ret;
694}
695
696static void hci_update_passive_scan_state(struct hci_dev *hdev, u8 scan)
697{
698 bool conn_changed, discov_changed;
699
700 BT_DBG("%s scan 0x%02x", hdev->name, scan);
701
702 if ((scan & SCAN_PAGE))
703 conn_changed = !hci_dev_test_and_set_flag(hdev,
704 HCI_CONNECTABLE);
705 else
706 conn_changed = hci_dev_test_and_clear_flag(hdev,
707 HCI_CONNECTABLE);
708
709 if ((scan & SCAN_INQUIRY)) {
710 discov_changed = !hci_dev_test_and_set_flag(hdev,
711 HCI_DISCOVERABLE);
712 } else {
713 hci_dev_clear_flag(hdev, HCI_LIMITED_DISCOVERABLE);
714 discov_changed = hci_dev_test_and_clear_flag(hdev,
715 HCI_DISCOVERABLE);
716 }
717
718 if (!hci_dev_test_flag(hdev, HCI_MGMT))
719 return;
720
721 if (conn_changed || discov_changed) {
722 /* In case this was disabled through mgmt */
723 hci_dev_set_flag(hdev, HCI_BREDR_ENABLED);
724
725 if (hci_dev_test_flag(hdev, HCI_LE_ENABLED))
726 hci_update_adv_data(hdev, hdev->cur_adv_instance);
727
728 mgmt_new_settings(hdev);
729 }
730}
731
732int hci_dev_cmd(unsigned int cmd, void __user *arg)
733{
734 struct hci_dev *hdev;
735 struct hci_dev_req dr;
736 int err = 0;
737
738 if (copy_from_user(&dr, arg, sizeof(dr)))
739 return -EFAULT;
740
741 hdev = hci_dev_get(dr.dev_id);
742 if (!hdev)
743 return -ENODEV;
744
745 if (hci_dev_test_flag(hdev, HCI_USER_CHANNEL)) {
746 err = -EBUSY;
747 goto done;
748 }
749
750 if (hci_dev_test_flag(hdev, HCI_UNCONFIGURED)) {
751 err = -EOPNOTSUPP;
752 goto done;
753 }
754
755 if (hdev->dev_type != HCI_PRIMARY) {
756 err = -EOPNOTSUPP;
757 goto done;
758 }
759
760 if (!hci_dev_test_flag(hdev, HCI_BREDR_ENABLED)) {
761 err = -EOPNOTSUPP;
762 goto done;
763 }
764
765 switch (cmd) {
766 case HCISETAUTH:
767 err = hci_req_sync(hdev, hci_auth_req, dr.dev_opt,
768 HCI_INIT_TIMEOUT, NULL);
769 break;
770
771 case HCISETENCRYPT:
772 if (!lmp_encrypt_capable(hdev)) {
773 err = -EOPNOTSUPP;
774 break;
775 }
776
777 if (!test_bit(HCI_AUTH, &hdev->flags)) {
778 /* Auth must be enabled first */
779 err = hci_req_sync(hdev, hci_auth_req, dr.dev_opt,
780 HCI_INIT_TIMEOUT, NULL);
781 if (err)
782 break;
783 }
784
785 err = hci_req_sync(hdev, hci_encrypt_req, dr.dev_opt,
786 HCI_INIT_TIMEOUT, NULL);
787 break;
788
789 case HCISETSCAN:
790 err = hci_req_sync(hdev, hci_scan_req, dr.dev_opt,
791 HCI_INIT_TIMEOUT, NULL);
792
793 /* Ensure that the connectable and discoverable states
794 * get correctly modified as this was a non-mgmt change.
795 */
796 if (!err)
797 hci_update_passive_scan_state(hdev, dr.dev_opt);
798 break;
799
800 case HCISETLINKPOL:
801 err = hci_req_sync(hdev, hci_linkpol_req, dr.dev_opt,
802 HCI_INIT_TIMEOUT, NULL);
803 break;
804
805 case HCISETLINKMODE:
806 hdev->link_mode = ((__u16) dr.dev_opt) &
807 (HCI_LM_MASTER | HCI_LM_ACCEPT);
808 break;
809
810 case HCISETPTYPE:
811 if (hdev->pkt_type == (__u16) dr.dev_opt)
812 break;
813
814 hdev->pkt_type = (__u16) dr.dev_opt;
815 mgmt_phy_configuration_changed(hdev, NULL);
816 break;
817
818 case HCISETACLMTU:
819 hdev->acl_mtu = *((__u16 *) &dr.dev_opt + 1);
820 hdev->acl_pkts = *((__u16 *) &dr.dev_opt + 0);
821 break;
822
823 case HCISETSCOMTU:
824 hdev->sco_mtu = *((__u16 *) &dr.dev_opt + 1);
825 hdev->sco_pkts = *((__u16 *) &dr.dev_opt + 0);
826 break;
827
828 default:
829 err = -EINVAL;
830 break;
831 }
832
833done:
834 hci_dev_put(hdev);
835 return err;
836}
837
838int hci_get_dev_list(void __user *arg)
839{
840 struct hci_dev *hdev;
841 struct hci_dev_list_req *dl;
842 struct hci_dev_req *dr;
843 int n = 0, size, err;
844 __u16 dev_num;
845
846 if (get_user(dev_num, (__u16 __user *) arg))
847 return -EFAULT;
848
849 if (!dev_num || dev_num > (PAGE_SIZE * 2) / sizeof(*dr))
850 return -EINVAL;
851
852 size = sizeof(*dl) + dev_num * sizeof(*dr);
853
854 dl = kzalloc(size, GFP_KERNEL);
855 if (!dl)
856 return -ENOMEM;
857
858 dr = dl->dev_req;
859
860 read_lock(&hci_dev_list_lock);
861 list_for_each_entry(hdev, &hci_dev_list, list) {
862 unsigned long flags = hdev->flags;
863
864 /* When the auto-off is configured it means the transport
865 * is running, but in that case still indicate that the
866 * device is actually down.
867 */
868 if (hci_dev_test_flag(hdev, HCI_AUTO_OFF))
869 flags &= ~BIT(HCI_UP);
870
871 (dr + n)->dev_id = hdev->id;
872 (dr + n)->dev_opt = flags;
873
874 if (++n >= dev_num)
875 break;
876 }
877 read_unlock(&hci_dev_list_lock);
878
879 dl->dev_num = n;
880 size = sizeof(*dl) + n * sizeof(*dr);
881
882 err = copy_to_user(arg, dl, size);
883 kfree(dl);
884
885 return err ? -EFAULT : 0;
886}
887
888int hci_get_dev_info(void __user *arg)
889{
890 struct hci_dev *hdev;
891 struct hci_dev_info di;
892 unsigned long flags;
893 int err = 0;
894
895 if (copy_from_user(&di, arg, sizeof(di)))
896 return -EFAULT;
897
898 hdev = hci_dev_get(di.dev_id);
899 if (!hdev)
900 return -ENODEV;
901
902 /* When the auto-off is configured it means the transport
903 * is running, but in that case still indicate that the
904 * device is actually down.
905 */
906 if (hci_dev_test_flag(hdev, HCI_AUTO_OFF))
907 flags = hdev->flags & ~BIT(HCI_UP);
908 else
909 flags = hdev->flags;
910
911 strcpy(di.name, hdev->name);
912 di.bdaddr = hdev->bdaddr;
913 di.type = (hdev->bus & 0x0f) | ((hdev->dev_type & 0x03) << 4);
914 di.flags = flags;
915 di.pkt_type = hdev->pkt_type;
916 if (lmp_bredr_capable(hdev)) {
917 di.acl_mtu = hdev->acl_mtu;
918 di.acl_pkts = hdev->acl_pkts;
919 di.sco_mtu = hdev->sco_mtu;
920 di.sco_pkts = hdev->sco_pkts;
921 } else {
922 di.acl_mtu = hdev->le_mtu;
923 di.acl_pkts = hdev->le_pkts;
924 di.sco_mtu = 0;
925 di.sco_pkts = 0;
926 }
927 di.link_policy = hdev->link_policy;
928 di.link_mode = hdev->link_mode;
929
930 memcpy(&di.stat, &hdev->stat, sizeof(di.stat));
931 memcpy(&di.features, &hdev->features, sizeof(di.features));
932
933 if (copy_to_user(arg, &di, sizeof(di)))
934 err = -EFAULT;
935
936 hci_dev_put(hdev);
937
938 return err;
939}
940
941/* ---- Interface to HCI drivers ---- */
942
943static int hci_rfkill_set_block(void *data, bool blocked)
944{
945 struct hci_dev *hdev = data;
946
947 BT_DBG("%p name %s blocked %d", hdev, hdev->name, blocked);
948
949 if (hci_dev_test_flag(hdev, HCI_USER_CHANNEL))
950 return -EBUSY;
951
952 if (blocked) {
953 hci_dev_set_flag(hdev, HCI_RFKILLED);
954 if (!hci_dev_test_flag(hdev, HCI_SETUP) &&
955 !hci_dev_test_flag(hdev, HCI_CONFIG))
956 hci_dev_do_close(hdev);
957 } else {
958 hci_dev_clear_flag(hdev, HCI_RFKILLED);
959 }
960
961 return 0;
962}
963
964static const struct rfkill_ops hci_rfkill_ops = {
965 .set_block = hci_rfkill_set_block,
966};
967
968static void hci_power_on(struct work_struct *work)
969{
970 struct hci_dev *hdev = container_of(work, struct hci_dev, power_on);
971 int err;
972
973 BT_DBG("%s", hdev->name);
974
975 if (test_bit(HCI_UP, &hdev->flags) &&
976 hci_dev_test_flag(hdev, HCI_MGMT) &&
977 hci_dev_test_and_clear_flag(hdev, HCI_AUTO_OFF)) {
978 cancel_delayed_work(&hdev->power_off);
979 err = hci_powered_update_sync(hdev);
980 mgmt_power_on(hdev, err);
981 return;
982 }
983
984 err = hci_dev_do_open(hdev);
985 if (err < 0) {
986 hci_dev_lock(hdev);
987 mgmt_set_powered_failed(hdev, err);
988 hci_dev_unlock(hdev);
989 return;
990 }
991
992 /* During the HCI setup phase, a few error conditions are
993 * ignored and they need to be checked now. If they are still
994 * valid, it is important to turn the device back off.
995 */
996 if (hci_dev_test_flag(hdev, HCI_RFKILLED) ||
997 hci_dev_test_flag(hdev, HCI_UNCONFIGURED) ||
998 (hdev->dev_type == HCI_PRIMARY &&
999 !bacmp(&hdev->bdaddr, BDADDR_ANY) &&
1000 !bacmp(&hdev->static_addr, BDADDR_ANY))) {
1001 hci_dev_clear_flag(hdev, HCI_AUTO_OFF);
1002 hci_dev_do_close(hdev);
1003 } else if (hci_dev_test_flag(hdev, HCI_AUTO_OFF)) {
1004 queue_delayed_work(hdev->req_workqueue, &hdev->power_off,
1005 HCI_AUTO_OFF_TIMEOUT);
1006 }
1007
1008 if (hci_dev_test_and_clear_flag(hdev, HCI_SETUP)) {
1009 /* For unconfigured devices, set the HCI_RAW flag
1010 * so that userspace can easily identify them.
1011 */
1012 if (hci_dev_test_flag(hdev, HCI_UNCONFIGURED))
1013 set_bit(HCI_RAW, &hdev->flags);
1014
1015 /* For fully configured devices, this will send
1016 * the Index Added event. For unconfigured devices,
1017 * it will send Unconfigued Index Added event.
1018 *
1019 * Devices with HCI_QUIRK_RAW_DEVICE are ignored
1020 * and no event will be send.
1021 */
1022 mgmt_index_added(hdev);
1023 } else if (hci_dev_test_and_clear_flag(hdev, HCI_CONFIG)) {
1024 /* When the controller is now configured, then it
1025 * is important to clear the HCI_RAW flag.
1026 */
1027 if (!hci_dev_test_flag(hdev, HCI_UNCONFIGURED))
1028 clear_bit(HCI_RAW, &hdev->flags);
1029
1030 /* Powering on the controller with HCI_CONFIG set only
1031 * happens with the transition from unconfigured to
1032 * configured. This will send the Index Added event.
1033 */
1034 mgmt_index_added(hdev);
1035 }
1036}
1037
1038static void hci_power_off(struct work_struct *work)
1039{
1040 struct hci_dev *hdev = container_of(work, struct hci_dev,
1041 power_off.work);
1042
1043 BT_DBG("%s", hdev->name);
1044
1045 hci_dev_do_close(hdev);
1046}
1047
1048static void hci_error_reset(struct work_struct *work)
1049{
1050 struct hci_dev *hdev = container_of(work, struct hci_dev, error_reset);
1051
1052 hci_dev_hold(hdev);
1053 BT_DBG("%s", hdev->name);
1054
1055 if (hdev->hw_error)
1056 hdev->hw_error(hdev, hdev->hw_error_code);
1057 else
1058 bt_dev_err(hdev, "hardware error 0x%2.2x", hdev->hw_error_code);
1059
1060 if (!hci_dev_do_close(hdev))
1061 hci_dev_do_open(hdev);
1062
1063 hci_dev_put(hdev);
1064}
1065
1066void hci_uuids_clear(struct hci_dev *hdev)
1067{
1068 struct bt_uuid *uuid, *tmp;
1069
1070 list_for_each_entry_safe(uuid, tmp, &hdev->uuids, list) {
1071 list_del(&uuid->list);
1072 kfree(uuid);
1073 }
1074}
1075
1076void hci_link_keys_clear(struct hci_dev *hdev)
1077{
1078 struct link_key *key, *tmp;
1079
1080 list_for_each_entry_safe(key, tmp, &hdev->link_keys, list) {
1081 list_del_rcu(&key->list);
1082 kfree_rcu(key, rcu);
1083 }
1084}
1085
1086void hci_smp_ltks_clear(struct hci_dev *hdev)
1087{
1088 struct smp_ltk *k, *tmp;
1089
1090 list_for_each_entry_safe(k, tmp, &hdev->long_term_keys, list) {
1091 list_del_rcu(&k->list);
1092 kfree_rcu(k, rcu);
1093 }
1094}
1095
1096void hci_smp_irks_clear(struct hci_dev *hdev)
1097{
1098 struct smp_irk *k, *tmp;
1099
1100 list_for_each_entry_safe(k, tmp, &hdev->identity_resolving_keys, list) {
1101 list_del_rcu(&k->list);
1102 kfree_rcu(k, rcu);
1103 }
1104}
1105
1106void hci_blocked_keys_clear(struct hci_dev *hdev)
1107{
1108 struct blocked_key *b, *tmp;
1109
1110 list_for_each_entry_safe(b, tmp, &hdev->blocked_keys, list) {
1111 list_del_rcu(&b->list);
1112 kfree_rcu(b, rcu);
1113 }
1114}
1115
1116bool hci_is_blocked_key(struct hci_dev *hdev, u8 type, u8 val[16])
1117{
1118 bool blocked = false;
1119 struct blocked_key *b;
1120
1121 rcu_read_lock();
1122 list_for_each_entry_rcu(b, &hdev->blocked_keys, list) {
1123 if (b->type == type && !memcmp(b->val, val, sizeof(b->val))) {
1124 blocked = true;
1125 break;
1126 }
1127 }
1128
1129 rcu_read_unlock();
1130 return blocked;
1131}
1132
1133struct link_key *hci_find_link_key(struct hci_dev *hdev, bdaddr_t *bdaddr)
1134{
1135 struct link_key *k;
1136
1137 rcu_read_lock();
1138 list_for_each_entry_rcu(k, &hdev->link_keys, list) {
1139 if (bacmp(bdaddr, &k->bdaddr) == 0) {
1140 rcu_read_unlock();
1141
1142 if (hci_is_blocked_key(hdev,
1143 HCI_BLOCKED_KEY_TYPE_LINKKEY,
1144 k->val)) {
1145 bt_dev_warn_ratelimited(hdev,
1146 "Link key blocked for %pMR",
1147 &k->bdaddr);
1148 return NULL;
1149 }
1150
1151 return k;
1152 }
1153 }
1154 rcu_read_unlock();
1155
1156 return NULL;
1157}
1158
1159static bool hci_persistent_key(struct hci_dev *hdev, struct hci_conn *conn,
1160 u8 key_type, u8 old_key_type)
1161{
1162 /* Legacy key */
1163 if (key_type < 0x03)
1164 return true;
1165
1166 /* Debug keys are insecure so don't store them persistently */
1167 if (key_type == HCI_LK_DEBUG_COMBINATION)
1168 return false;
1169
1170 /* Changed combination key and there's no previous one */
1171 if (key_type == HCI_LK_CHANGED_COMBINATION && old_key_type == 0xff)
1172 return false;
1173
1174 /* Security mode 3 case */
1175 if (!conn)
1176 return true;
1177
1178 /* BR/EDR key derived using SC from an LE link */
1179 if (conn->type == LE_LINK)
1180 return true;
1181
1182 /* Neither local nor remote side had no-bonding as requirement */
1183 if (conn->auth_type > 0x01 && conn->remote_auth > 0x01)
1184 return true;
1185
1186 /* Local side had dedicated bonding as requirement */
1187 if (conn->auth_type == 0x02 || conn->auth_type == 0x03)
1188 return true;
1189
1190 /* Remote side had dedicated bonding as requirement */
1191 if (conn->remote_auth == 0x02 || conn->remote_auth == 0x03)
1192 return true;
1193
1194 /* If none of the above criteria match, then don't store the key
1195 * persistently */
1196 return false;
1197}
1198
1199static u8 ltk_role(u8 type)
1200{
1201 if (type == SMP_LTK)
1202 return HCI_ROLE_MASTER;
1203
1204 return HCI_ROLE_SLAVE;
1205}
1206
1207struct smp_ltk *hci_find_ltk(struct hci_dev *hdev, bdaddr_t *bdaddr,
1208 u8 addr_type, u8 role)
1209{
1210 struct smp_ltk *k;
1211
1212 rcu_read_lock();
1213 list_for_each_entry_rcu(k, &hdev->long_term_keys, list) {
1214 if (addr_type != k->bdaddr_type || bacmp(bdaddr, &k->bdaddr))
1215 continue;
1216
1217 if (smp_ltk_is_sc(k) || ltk_role(k->type) == role) {
1218 rcu_read_unlock();
1219
1220 if (hci_is_blocked_key(hdev, HCI_BLOCKED_KEY_TYPE_LTK,
1221 k->val)) {
1222 bt_dev_warn_ratelimited(hdev,
1223 "LTK blocked for %pMR",
1224 &k->bdaddr);
1225 return NULL;
1226 }
1227
1228 return k;
1229 }
1230 }
1231 rcu_read_unlock();
1232
1233 return NULL;
1234}
1235
1236struct smp_irk *hci_find_irk_by_rpa(struct hci_dev *hdev, bdaddr_t *rpa)
1237{
1238 struct smp_irk *irk_to_return = NULL;
1239 struct smp_irk *irk;
1240
1241 rcu_read_lock();
1242 list_for_each_entry_rcu(irk, &hdev->identity_resolving_keys, list) {
1243 if (!bacmp(&irk->rpa, rpa)) {
1244 irk_to_return = irk;
1245 goto done;
1246 }
1247 }
1248
1249 list_for_each_entry_rcu(irk, &hdev->identity_resolving_keys, list) {
1250 if (smp_irk_matches(hdev, irk->val, rpa)) {
1251 bacpy(&irk->rpa, rpa);
1252 irk_to_return = irk;
1253 goto done;
1254 }
1255 }
1256
1257done:
1258 if (irk_to_return && hci_is_blocked_key(hdev, HCI_BLOCKED_KEY_TYPE_IRK,
1259 irk_to_return->val)) {
1260 bt_dev_warn_ratelimited(hdev, "Identity key blocked for %pMR",
1261 &irk_to_return->bdaddr);
1262 irk_to_return = NULL;
1263 }
1264
1265 rcu_read_unlock();
1266
1267 return irk_to_return;
1268}
1269
1270struct smp_irk *hci_find_irk_by_addr(struct hci_dev *hdev, bdaddr_t *bdaddr,
1271 u8 addr_type)
1272{
1273 struct smp_irk *irk_to_return = NULL;
1274 struct smp_irk *irk;
1275
1276 /* Identity Address must be public or static random */
1277 if (addr_type == ADDR_LE_DEV_RANDOM && (bdaddr->b[5] & 0xc0) != 0xc0)
1278 return NULL;
1279
1280 rcu_read_lock();
1281 list_for_each_entry_rcu(irk, &hdev->identity_resolving_keys, list) {
1282 if (addr_type == irk->addr_type &&
1283 bacmp(bdaddr, &irk->bdaddr) == 0) {
1284 irk_to_return = irk;
1285 goto done;
1286 }
1287 }
1288
1289done:
1290
1291 if (irk_to_return && hci_is_blocked_key(hdev, HCI_BLOCKED_KEY_TYPE_IRK,
1292 irk_to_return->val)) {
1293 bt_dev_warn_ratelimited(hdev, "Identity key blocked for %pMR",
1294 &irk_to_return->bdaddr);
1295 irk_to_return = NULL;
1296 }
1297
1298 rcu_read_unlock();
1299
1300 return irk_to_return;
1301}
1302
1303struct link_key *hci_add_link_key(struct hci_dev *hdev, struct hci_conn *conn,
1304 bdaddr_t *bdaddr, u8 *val, u8 type,
1305 u8 pin_len, bool *persistent)
1306{
1307 struct link_key *key, *old_key;
1308 u8 old_key_type;
1309
1310 old_key = hci_find_link_key(hdev, bdaddr);
1311 if (old_key) {
1312 old_key_type = old_key->type;
1313 key = old_key;
1314 } else {
1315 old_key_type = conn ? conn->key_type : 0xff;
1316 key = kzalloc(sizeof(*key), GFP_KERNEL);
1317 if (!key)
1318 return NULL;
1319 list_add_rcu(&key->list, &hdev->link_keys);
1320 }
1321
1322 BT_DBG("%s key for %pMR type %u", hdev->name, bdaddr, type);
1323
1324 /* Some buggy controller combinations generate a changed
1325 * combination key for legacy pairing even when there's no
1326 * previous key */
1327 if (type == HCI_LK_CHANGED_COMBINATION &&
1328 (!conn || conn->remote_auth == 0xff) && old_key_type == 0xff) {
1329 type = HCI_LK_COMBINATION;
1330 if (conn)
1331 conn->key_type = type;
1332 }
1333
1334 bacpy(&key->bdaddr, bdaddr);
1335 memcpy(key->val, val, HCI_LINK_KEY_SIZE);
1336 key->pin_len = pin_len;
1337
1338 if (type == HCI_LK_CHANGED_COMBINATION)
1339 key->type = old_key_type;
1340 else
1341 key->type = type;
1342
1343 if (persistent)
1344 *persistent = hci_persistent_key(hdev, conn, type,
1345 old_key_type);
1346
1347 return key;
1348}
1349
1350struct smp_ltk *hci_add_ltk(struct hci_dev *hdev, bdaddr_t *bdaddr,
1351 u8 addr_type, u8 type, u8 authenticated,
1352 u8 tk[16], u8 enc_size, __le16 ediv, __le64 rand)
1353{
1354 struct smp_ltk *key, *old_key;
1355 u8 role = ltk_role(type);
1356
1357 old_key = hci_find_ltk(hdev, bdaddr, addr_type, role);
1358 if (old_key)
1359 key = old_key;
1360 else {
1361 key = kzalloc(sizeof(*key), GFP_KERNEL);
1362 if (!key)
1363 return NULL;
1364 list_add_rcu(&key->list, &hdev->long_term_keys);
1365 }
1366
1367 bacpy(&key->bdaddr, bdaddr);
1368 key->bdaddr_type = addr_type;
1369 memcpy(key->val, tk, sizeof(key->val));
1370 key->authenticated = authenticated;
1371 key->ediv = ediv;
1372 key->rand = rand;
1373 key->enc_size = enc_size;
1374 key->type = type;
1375
1376 return key;
1377}
1378
1379struct smp_irk *hci_add_irk(struct hci_dev *hdev, bdaddr_t *bdaddr,
1380 u8 addr_type, u8 val[16], bdaddr_t *rpa)
1381{
1382 struct smp_irk *irk;
1383
1384 irk = hci_find_irk_by_addr(hdev, bdaddr, addr_type);
1385 if (!irk) {
1386 irk = kzalloc(sizeof(*irk), GFP_KERNEL);
1387 if (!irk)
1388 return NULL;
1389
1390 bacpy(&irk->bdaddr, bdaddr);
1391 irk->addr_type = addr_type;
1392
1393 list_add_rcu(&irk->list, &hdev->identity_resolving_keys);
1394 }
1395
1396 memcpy(irk->val, val, 16);
1397 bacpy(&irk->rpa, rpa);
1398
1399 return irk;
1400}
1401
1402int hci_remove_link_key(struct hci_dev *hdev, bdaddr_t *bdaddr)
1403{
1404 struct link_key *key;
1405
1406 key = hci_find_link_key(hdev, bdaddr);
1407 if (!key)
1408 return -ENOENT;
1409
1410 BT_DBG("%s removing %pMR", hdev->name, bdaddr);
1411
1412 list_del_rcu(&key->list);
1413 kfree_rcu(key, rcu);
1414
1415 return 0;
1416}
1417
1418int hci_remove_ltk(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 bdaddr_type)
1419{
1420 struct smp_ltk *k, *tmp;
1421 int removed = 0;
1422
1423 list_for_each_entry_safe(k, tmp, &hdev->long_term_keys, list) {
1424 if (bacmp(bdaddr, &k->bdaddr) || k->bdaddr_type != bdaddr_type)
1425 continue;
1426
1427 BT_DBG("%s removing %pMR", hdev->name, bdaddr);
1428
1429 list_del_rcu(&k->list);
1430 kfree_rcu(k, rcu);
1431 removed++;
1432 }
1433
1434 return removed ? 0 : -ENOENT;
1435}
1436
1437void hci_remove_irk(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 addr_type)
1438{
1439 struct smp_irk *k, *tmp;
1440
1441 list_for_each_entry_safe(k, tmp, &hdev->identity_resolving_keys, list) {
1442 if (bacmp(bdaddr, &k->bdaddr) || k->addr_type != addr_type)
1443 continue;
1444
1445 BT_DBG("%s removing %pMR", hdev->name, bdaddr);
1446
1447 list_del_rcu(&k->list);
1448 kfree_rcu(k, rcu);
1449 }
1450}
1451
1452bool hci_bdaddr_is_paired(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 type)
1453{
1454 struct smp_ltk *k;
1455 struct smp_irk *irk;
1456 u8 addr_type;
1457
1458 if (type == BDADDR_BREDR) {
1459 if (hci_find_link_key(hdev, bdaddr))
1460 return true;
1461 return false;
1462 }
1463
1464 /* Convert to HCI addr type which struct smp_ltk uses */
1465 if (type == BDADDR_LE_PUBLIC)
1466 addr_type = ADDR_LE_DEV_PUBLIC;
1467 else
1468 addr_type = ADDR_LE_DEV_RANDOM;
1469
1470 irk = hci_get_irk(hdev, bdaddr, addr_type);
1471 if (irk) {
1472 bdaddr = &irk->bdaddr;
1473 addr_type = irk->addr_type;
1474 }
1475
1476 rcu_read_lock();
1477 list_for_each_entry_rcu(k, &hdev->long_term_keys, list) {
1478 if (k->bdaddr_type == addr_type && !bacmp(bdaddr, &k->bdaddr)) {
1479 rcu_read_unlock();
1480 return true;
1481 }
1482 }
1483 rcu_read_unlock();
1484
1485 return false;
1486}
1487
1488/* HCI command timer function */
1489static void hci_cmd_timeout(struct work_struct *work)
1490{
1491 struct hci_dev *hdev = container_of(work, struct hci_dev,
1492 cmd_timer.work);
1493
1494 if (hdev->sent_cmd) {
1495 struct hci_command_hdr *sent = (void *) hdev->sent_cmd->data;
1496 u16 opcode = __le16_to_cpu(sent->opcode);
1497
1498 bt_dev_err(hdev, "command 0x%4.4x tx timeout", opcode);
1499 } else {
1500 bt_dev_err(hdev, "command tx timeout");
1501 }
1502
1503 if (hdev->cmd_timeout)
1504 hdev->cmd_timeout(hdev);
1505
1506 atomic_set(&hdev->cmd_cnt, 1);
1507 queue_work(hdev->workqueue, &hdev->cmd_work);
1508}
1509
1510/* HCI ncmd timer function */
1511static void hci_ncmd_timeout(struct work_struct *work)
1512{
1513 struct hci_dev *hdev = container_of(work, struct hci_dev,
1514 ncmd_timer.work);
1515
1516 bt_dev_err(hdev, "Controller not accepting commands anymore: ncmd = 0");
1517
1518 /* During HCI_INIT phase no events can be injected if the ncmd timer
1519 * triggers since the procedure has its own timeout handling.
1520 */
1521 if (test_bit(HCI_INIT, &hdev->flags))
1522 return;
1523
1524 /* This is an irrecoverable state, inject hardware error event */
1525 hci_reset_dev(hdev);
1526}
1527
1528struct oob_data *hci_find_remote_oob_data(struct hci_dev *hdev,
1529 bdaddr_t *bdaddr, u8 bdaddr_type)
1530{
1531 struct oob_data *data;
1532
1533 list_for_each_entry(data, &hdev->remote_oob_data, list) {
1534 if (bacmp(bdaddr, &data->bdaddr) != 0)
1535 continue;
1536 if (data->bdaddr_type != bdaddr_type)
1537 continue;
1538 return data;
1539 }
1540
1541 return NULL;
1542}
1543
1544int hci_remove_remote_oob_data(struct hci_dev *hdev, bdaddr_t *bdaddr,
1545 u8 bdaddr_type)
1546{
1547 struct oob_data *data;
1548
1549 data = hci_find_remote_oob_data(hdev, bdaddr, bdaddr_type);
1550 if (!data)
1551 return -ENOENT;
1552
1553 BT_DBG("%s removing %pMR (%u)", hdev->name, bdaddr, bdaddr_type);
1554
1555 list_del(&data->list);
1556 kfree(data);
1557
1558 return 0;
1559}
1560
1561void hci_remote_oob_data_clear(struct hci_dev *hdev)
1562{
1563 struct oob_data *data, *n;
1564
1565 list_for_each_entry_safe(data, n, &hdev->remote_oob_data, list) {
1566 list_del(&data->list);
1567 kfree(data);
1568 }
1569}
1570
1571int hci_add_remote_oob_data(struct hci_dev *hdev, bdaddr_t *bdaddr,
1572 u8 bdaddr_type, u8 *hash192, u8 *rand192,
1573 u8 *hash256, u8 *rand256)
1574{
1575 struct oob_data *data;
1576
1577 data = hci_find_remote_oob_data(hdev, bdaddr, bdaddr_type);
1578 if (!data) {
1579 data = kmalloc(sizeof(*data), GFP_KERNEL);
1580 if (!data)
1581 return -ENOMEM;
1582
1583 bacpy(&data->bdaddr, bdaddr);
1584 data->bdaddr_type = bdaddr_type;
1585 list_add(&data->list, &hdev->remote_oob_data);
1586 }
1587
1588 if (hash192 && rand192) {
1589 memcpy(data->hash192, hash192, sizeof(data->hash192));
1590 memcpy(data->rand192, rand192, sizeof(data->rand192));
1591 if (hash256 && rand256)
1592 data->present = 0x03;
1593 } else {
1594 memset(data->hash192, 0, sizeof(data->hash192));
1595 memset(data->rand192, 0, sizeof(data->rand192));
1596 if (hash256 && rand256)
1597 data->present = 0x02;
1598 else
1599 data->present = 0x00;
1600 }
1601
1602 if (hash256 && rand256) {
1603 memcpy(data->hash256, hash256, sizeof(data->hash256));
1604 memcpy(data->rand256, rand256, sizeof(data->rand256));
1605 } else {
1606 memset(data->hash256, 0, sizeof(data->hash256));
1607 memset(data->rand256, 0, sizeof(data->rand256));
1608 if (hash192 && rand192)
1609 data->present = 0x01;
1610 }
1611
1612 BT_DBG("%s for %pMR", hdev->name, bdaddr);
1613
1614 return 0;
1615}
1616
1617/* This function requires the caller holds hdev->lock */
1618struct adv_info *hci_find_adv_instance(struct hci_dev *hdev, u8 instance)
1619{
1620 struct adv_info *adv_instance;
1621
1622 list_for_each_entry(adv_instance, &hdev->adv_instances, list) {
1623 if (adv_instance->instance == instance)
1624 return adv_instance;
1625 }
1626
1627 return NULL;
1628}
1629
1630/* This function requires the caller holds hdev->lock */
1631struct adv_info *hci_get_next_instance(struct hci_dev *hdev, u8 instance)
1632{
1633 struct adv_info *cur_instance;
1634
1635 cur_instance = hci_find_adv_instance(hdev, instance);
1636 if (!cur_instance)
1637 return NULL;
1638
1639 if (cur_instance == list_last_entry(&hdev->adv_instances,
1640 struct adv_info, list))
1641 return list_first_entry(&hdev->adv_instances,
1642 struct adv_info, list);
1643 else
1644 return list_next_entry(cur_instance, list);
1645}
1646
1647/* This function requires the caller holds hdev->lock */
1648int hci_remove_adv_instance(struct hci_dev *hdev, u8 instance)
1649{
1650 struct adv_info *adv_instance;
1651
1652 adv_instance = hci_find_adv_instance(hdev, instance);
1653 if (!adv_instance)
1654 return -ENOENT;
1655
1656 BT_DBG("%s removing %dMR", hdev->name, instance);
1657
1658 if (hdev->cur_adv_instance == instance) {
1659 if (hdev->adv_instance_timeout) {
1660 cancel_delayed_work(&hdev->adv_instance_expire);
1661 hdev->adv_instance_timeout = 0;
1662 }
1663 hdev->cur_adv_instance = 0x00;
1664 }
1665
1666 cancel_delayed_work_sync(&adv_instance->rpa_expired_cb);
1667
1668 list_del(&adv_instance->list);
1669 kfree(adv_instance);
1670
1671 hdev->adv_instance_cnt--;
1672
1673 return 0;
1674}
1675
1676void hci_adv_instances_set_rpa_expired(struct hci_dev *hdev, bool rpa_expired)
1677{
1678 struct adv_info *adv_instance, *n;
1679
1680 list_for_each_entry_safe(adv_instance, n, &hdev->adv_instances, list)
1681 adv_instance->rpa_expired = rpa_expired;
1682}
1683
1684/* This function requires the caller holds hdev->lock */
1685void hci_adv_instances_clear(struct hci_dev *hdev)
1686{
1687 struct adv_info *adv_instance, *n;
1688
1689 if (hdev->adv_instance_timeout) {
1690 cancel_delayed_work(&hdev->adv_instance_expire);
1691 hdev->adv_instance_timeout = 0;
1692 }
1693
1694 list_for_each_entry_safe(adv_instance, n, &hdev->adv_instances, list) {
1695 cancel_delayed_work_sync(&adv_instance->rpa_expired_cb);
1696 list_del(&adv_instance->list);
1697 kfree(adv_instance);
1698 }
1699
1700 hdev->adv_instance_cnt = 0;
1701 hdev->cur_adv_instance = 0x00;
1702}
1703
1704static void adv_instance_rpa_expired(struct work_struct *work)
1705{
1706 struct adv_info *adv_instance = container_of(work, struct adv_info,
1707 rpa_expired_cb.work);
1708
1709 BT_DBG("");
1710
1711 adv_instance->rpa_expired = true;
1712}
1713
1714/* This function requires the caller holds hdev->lock */
1715struct adv_info *hci_add_adv_instance(struct hci_dev *hdev, u8 instance,
1716 u32 flags, u16 adv_data_len, u8 *adv_data,
1717 u16 scan_rsp_len, u8 *scan_rsp_data,
1718 u16 timeout, u16 duration, s8 tx_power,
1719 u32 min_interval, u32 max_interval,
1720 u8 mesh_handle)
1721{
1722 struct adv_info *adv;
1723
1724 adv = hci_find_adv_instance(hdev, instance);
1725 if (adv) {
1726 memset(adv->adv_data, 0, sizeof(adv->adv_data));
1727 memset(adv->scan_rsp_data, 0, sizeof(adv->scan_rsp_data));
1728 memset(adv->per_adv_data, 0, sizeof(adv->per_adv_data));
1729 } else {
1730 if (hdev->adv_instance_cnt >= hdev->le_num_of_adv_sets ||
1731 instance < 1 || instance > hdev->le_num_of_adv_sets + 1)
1732 return ERR_PTR(-EOVERFLOW);
1733
1734 adv = kzalloc(sizeof(*adv), GFP_KERNEL);
1735 if (!adv)
1736 return ERR_PTR(-ENOMEM);
1737
1738 adv->pending = true;
1739 adv->instance = instance;
1740 list_add(&adv->list, &hdev->adv_instances);
1741 hdev->adv_instance_cnt++;
1742 }
1743
1744 adv->flags = flags;
1745 adv->min_interval = min_interval;
1746 adv->max_interval = max_interval;
1747 adv->tx_power = tx_power;
1748 /* Defining a mesh_handle changes the timing units to ms,
1749 * rather than seconds, and ties the instance to the requested
1750 * mesh_tx queue.
1751 */
1752 adv->mesh = mesh_handle;
1753
1754 hci_set_adv_instance_data(hdev, instance, adv_data_len, adv_data,
1755 scan_rsp_len, scan_rsp_data);
1756
1757 adv->timeout = timeout;
1758 adv->remaining_time = timeout;
1759
1760 if (duration == 0)
1761 adv->duration = hdev->def_multi_adv_rotation_duration;
1762 else
1763 adv->duration = duration;
1764
1765 INIT_DELAYED_WORK(&adv->rpa_expired_cb, adv_instance_rpa_expired);
1766
1767 BT_DBG("%s for %dMR", hdev->name, instance);
1768
1769 return adv;
1770}
1771
1772/* This function requires the caller holds hdev->lock */
1773struct adv_info *hci_add_per_instance(struct hci_dev *hdev, u8 instance,
1774 u32 flags, u8 data_len, u8 *data,
1775 u32 min_interval, u32 max_interval)
1776{
1777 struct adv_info *adv;
1778
1779 adv = hci_add_adv_instance(hdev, instance, flags, 0, NULL, 0, NULL,
1780 0, 0, HCI_ADV_TX_POWER_NO_PREFERENCE,
1781 min_interval, max_interval, 0);
1782 if (IS_ERR(adv))
1783 return adv;
1784
1785 adv->periodic = true;
1786 adv->per_adv_data_len = data_len;
1787
1788 if (data)
1789 memcpy(adv->per_adv_data, data, data_len);
1790
1791 return adv;
1792}
1793
1794/* This function requires the caller holds hdev->lock */
1795int hci_set_adv_instance_data(struct hci_dev *hdev, u8 instance,
1796 u16 adv_data_len, u8 *adv_data,
1797 u16 scan_rsp_len, u8 *scan_rsp_data)
1798{
1799 struct adv_info *adv;
1800
1801 adv = hci_find_adv_instance(hdev, instance);
1802
1803 /* If advertisement doesn't exist, we can't modify its data */
1804 if (!adv)
1805 return -ENOENT;
1806
1807 if (adv_data_len && ADV_DATA_CMP(adv, adv_data, adv_data_len)) {
1808 memset(adv->adv_data, 0, sizeof(adv->adv_data));
1809 memcpy(adv->adv_data, adv_data, adv_data_len);
1810 adv->adv_data_len = adv_data_len;
1811 adv->adv_data_changed = true;
1812 }
1813
1814 if (scan_rsp_len && SCAN_RSP_CMP(adv, scan_rsp_data, scan_rsp_len)) {
1815 memset(adv->scan_rsp_data, 0, sizeof(adv->scan_rsp_data));
1816 memcpy(adv->scan_rsp_data, scan_rsp_data, scan_rsp_len);
1817 adv->scan_rsp_len = scan_rsp_len;
1818 adv->scan_rsp_changed = true;
1819 }
1820
1821 /* Mark as changed if there are flags which would affect it */
1822 if (((adv->flags & MGMT_ADV_FLAG_APPEARANCE) && hdev->appearance) ||
1823 adv->flags & MGMT_ADV_FLAG_LOCAL_NAME)
1824 adv->scan_rsp_changed = true;
1825
1826 return 0;
1827}
1828
1829/* This function requires the caller holds hdev->lock */
1830u32 hci_adv_instance_flags(struct hci_dev *hdev, u8 instance)
1831{
1832 u32 flags;
1833 struct adv_info *adv;
1834
1835 if (instance == 0x00) {
1836 /* Instance 0 always manages the "Tx Power" and "Flags"
1837 * fields
1838 */
1839 flags = MGMT_ADV_FLAG_TX_POWER | MGMT_ADV_FLAG_MANAGED_FLAGS;
1840
1841 /* For instance 0, the HCI_ADVERTISING_CONNECTABLE setting
1842 * corresponds to the "connectable" instance flag.
1843 */
1844 if (hci_dev_test_flag(hdev, HCI_ADVERTISING_CONNECTABLE))
1845 flags |= MGMT_ADV_FLAG_CONNECTABLE;
1846
1847 if (hci_dev_test_flag(hdev, HCI_LIMITED_DISCOVERABLE))
1848 flags |= MGMT_ADV_FLAG_LIMITED_DISCOV;
1849 else if (hci_dev_test_flag(hdev, HCI_DISCOVERABLE))
1850 flags |= MGMT_ADV_FLAG_DISCOV;
1851
1852 return flags;
1853 }
1854
1855 adv = hci_find_adv_instance(hdev, instance);
1856
1857 /* Return 0 when we got an invalid instance identifier. */
1858 if (!adv)
1859 return 0;
1860
1861 return adv->flags;
1862}
1863
1864bool hci_adv_instance_is_scannable(struct hci_dev *hdev, u8 instance)
1865{
1866 struct adv_info *adv;
1867
1868 /* Instance 0x00 always set local name */
1869 if (instance == 0x00)
1870 return true;
1871
1872 adv = hci_find_adv_instance(hdev, instance);
1873 if (!adv)
1874 return false;
1875
1876 if (adv->flags & MGMT_ADV_FLAG_APPEARANCE ||
1877 adv->flags & MGMT_ADV_FLAG_LOCAL_NAME)
1878 return true;
1879
1880 return adv->scan_rsp_len ? true : false;
1881}
1882
1883/* This function requires the caller holds hdev->lock */
1884void hci_adv_monitors_clear(struct hci_dev *hdev)
1885{
1886 struct adv_monitor *monitor;
1887 int handle;
1888
1889 idr_for_each_entry(&hdev->adv_monitors_idr, monitor, handle)
1890 hci_free_adv_monitor(hdev, monitor);
1891
1892 idr_destroy(&hdev->adv_monitors_idr);
1893}
1894
1895/* Frees the monitor structure and do some bookkeepings.
1896 * This function requires the caller holds hdev->lock.
1897 */
1898void hci_free_adv_monitor(struct hci_dev *hdev, struct adv_monitor *monitor)
1899{
1900 struct adv_pattern *pattern;
1901 struct adv_pattern *tmp;
1902
1903 if (!monitor)
1904 return;
1905
1906 list_for_each_entry_safe(pattern, tmp, &monitor->patterns, list) {
1907 list_del(&pattern->list);
1908 kfree(pattern);
1909 }
1910
1911 if (monitor->handle)
1912 idr_remove(&hdev->adv_monitors_idr, monitor->handle);
1913
1914 if (monitor->state != ADV_MONITOR_STATE_NOT_REGISTERED) {
1915 hdev->adv_monitors_cnt--;
1916 mgmt_adv_monitor_removed(hdev, monitor->handle);
1917 }
1918
1919 kfree(monitor);
1920}
1921
1922/* Assigns handle to a monitor, and if offloading is supported and power is on,
1923 * also attempts to forward the request to the controller.
1924 * This function requires the caller holds hci_req_sync_lock.
1925 */
1926int hci_add_adv_monitor(struct hci_dev *hdev, struct adv_monitor *monitor)
1927{
1928 int min, max, handle;
1929 int status = 0;
1930
1931 if (!monitor)
1932 return -EINVAL;
1933
1934 hci_dev_lock(hdev);
1935
1936 min = HCI_MIN_ADV_MONITOR_HANDLE;
1937 max = HCI_MIN_ADV_MONITOR_HANDLE + HCI_MAX_ADV_MONITOR_NUM_HANDLES;
1938 handle = idr_alloc(&hdev->adv_monitors_idr, monitor, min, max,
1939 GFP_KERNEL);
1940
1941 hci_dev_unlock(hdev);
1942
1943 if (handle < 0)
1944 return handle;
1945
1946 monitor->handle = handle;
1947
1948 if (!hdev_is_powered(hdev))
1949 return status;
1950
1951 switch (hci_get_adv_monitor_offload_ext(hdev)) {
1952 case HCI_ADV_MONITOR_EXT_NONE:
1953 bt_dev_dbg(hdev, "add monitor %d status %d",
1954 monitor->handle, status);
1955 /* Message was not forwarded to controller - not an error */
1956 break;
1957
1958 case HCI_ADV_MONITOR_EXT_MSFT:
1959 status = msft_add_monitor_pattern(hdev, monitor);
1960 bt_dev_dbg(hdev, "add monitor %d msft status %d",
1961 handle, status);
1962 break;
1963 }
1964
1965 return status;
1966}
1967
1968/* Attempts to tell the controller and free the monitor. If somehow the
1969 * controller doesn't have a corresponding handle, remove anyway.
1970 * This function requires the caller holds hci_req_sync_lock.
1971 */
1972static int hci_remove_adv_monitor(struct hci_dev *hdev,
1973 struct adv_monitor *monitor)
1974{
1975 int status = 0;
1976 int handle;
1977
1978 switch (hci_get_adv_monitor_offload_ext(hdev)) {
1979 case HCI_ADV_MONITOR_EXT_NONE: /* also goes here when powered off */
1980 bt_dev_dbg(hdev, "remove monitor %d status %d",
1981 monitor->handle, status);
1982 goto free_monitor;
1983
1984 case HCI_ADV_MONITOR_EXT_MSFT:
1985 handle = monitor->handle;
1986 status = msft_remove_monitor(hdev, monitor);
1987 bt_dev_dbg(hdev, "remove monitor %d msft status %d",
1988 handle, status);
1989 break;
1990 }
1991
1992 /* In case no matching handle registered, just free the monitor */
1993 if (status == -ENOENT)
1994 goto free_monitor;
1995
1996 return status;
1997
1998free_monitor:
1999 if (status == -ENOENT)
2000 bt_dev_warn(hdev, "Removing monitor with no matching handle %d",
2001 monitor->handle);
2002 hci_free_adv_monitor(hdev, monitor);
2003
2004 return status;
2005}
2006
2007/* This function requires the caller holds hci_req_sync_lock */
2008int hci_remove_single_adv_monitor(struct hci_dev *hdev, u16 handle)
2009{
2010 struct adv_monitor *monitor = idr_find(&hdev->adv_monitors_idr, handle);
2011
2012 if (!monitor)
2013 return -EINVAL;
2014
2015 return hci_remove_adv_monitor(hdev, monitor);
2016}
2017
2018/* This function requires the caller holds hci_req_sync_lock */
2019int hci_remove_all_adv_monitor(struct hci_dev *hdev)
2020{
2021 struct adv_monitor *monitor;
2022 int idr_next_id = 0;
2023 int status = 0;
2024
2025 while (1) {
2026 monitor = idr_get_next(&hdev->adv_monitors_idr, &idr_next_id);
2027 if (!monitor)
2028 break;
2029
2030 status = hci_remove_adv_monitor(hdev, monitor);
2031 if (status)
2032 return status;
2033
2034 idr_next_id++;
2035 }
2036
2037 return status;
2038}
2039
2040/* This function requires the caller holds hdev->lock */
2041bool hci_is_adv_monitoring(struct hci_dev *hdev)
2042{
2043 return !idr_is_empty(&hdev->adv_monitors_idr);
2044}
2045
2046int hci_get_adv_monitor_offload_ext(struct hci_dev *hdev)
2047{
2048 if (msft_monitor_supported(hdev))
2049 return HCI_ADV_MONITOR_EXT_MSFT;
2050
2051 return HCI_ADV_MONITOR_EXT_NONE;
2052}
2053
2054struct bdaddr_list *hci_bdaddr_list_lookup(struct list_head *bdaddr_list,
2055 bdaddr_t *bdaddr, u8 type)
2056{
2057 struct bdaddr_list *b;
2058
2059 list_for_each_entry(b, bdaddr_list, list) {
2060 if (!bacmp(&b->bdaddr, bdaddr) && b->bdaddr_type == type)
2061 return b;
2062 }
2063
2064 return NULL;
2065}
2066
2067struct bdaddr_list_with_irk *hci_bdaddr_list_lookup_with_irk(
2068 struct list_head *bdaddr_list, bdaddr_t *bdaddr,
2069 u8 type)
2070{
2071 struct bdaddr_list_with_irk *b;
2072
2073 list_for_each_entry(b, bdaddr_list, list) {
2074 if (!bacmp(&b->bdaddr, bdaddr) && b->bdaddr_type == type)
2075 return b;
2076 }
2077
2078 return NULL;
2079}
2080
2081struct bdaddr_list_with_flags *
2082hci_bdaddr_list_lookup_with_flags(struct list_head *bdaddr_list,
2083 bdaddr_t *bdaddr, u8 type)
2084{
2085 struct bdaddr_list_with_flags *b;
2086
2087 list_for_each_entry(b, bdaddr_list, list) {
2088 if (!bacmp(&b->bdaddr, bdaddr) && b->bdaddr_type == type)
2089 return b;
2090 }
2091
2092 return NULL;
2093}
2094
2095void hci_bdaddr_list_clear(struct list_head *bdaddr_list)
2096{
2097 struct bdaddr_list *b, *n;
2098
2099 list_for_each_entry_safe(b, n, bdaddr_list, list) {
2100 list_del(&b->list);
2101 kfree(b);
2102 }
2103}
2104
2105int hci_bdaddr_list_add(struct list_head *list, bdaddr_t *bdaddr, u8 type)
2106{
2107 struct bdaddr_list *entry;
2108
2109 if (!bacmp(bdaddr, BDADDR_ANY))
2110 return -EBADF;
2111
2112 if (hci_bdaddr_list_lookup(list, bdaddr, type))
2113 return -EEXIST;
2114
2115 entry = kzalloc(sizeof(*entry), GFP_KERNEL);
2116 if (!entry)
2117 return -ENOMEM;
2118
2119 bacpy(&entry->bdaddr, bdaddr);
2120 entry->bdaddr_type = type;
2121
2122 list_add(&entry->list, list);
2123
2124 return 0;
2125}
2126
2127int hci_bdaddr_list_add_with_irk(struct list_head *list, bdaddr_t *bdaddr,
2128 u8 type, u8 *peer_irk, u8 *local_irk)
2129{
2130 struct bdaddr_list_with_irk *entry;
2131
2132 if (!bacmp(bdaddr, BDADDR_ANY))
2133 return -EBADF;
2134
2135 if (hci_bdaddr_list_lookup(list, bdaddr, type))
2136 return -EEXIST;
2137
2138 entry = kzalloc(sizeof(*entry), GFP_KERNEL);
2139 if (!entry)
2140 return -ENOMEM;
2141
2142 bacpy(&entry->bdaddr, bdaddr);
2143 entry->bdaddr_type = type;
2144
2145 if (peer_irk)
2146 memcpy(entry->peer_irk, peer_irk, 16);
2147
2148 if (local_irk)
2149 memcpy(entry->local_irk, local_irk, 16);
2150
2151 list_add(&entry->list, list);
2152
2153 return 0;
2154}
2155
2156int hci_bdaddr_list_add_with_flags(struct list_head *list, bdaddr_t *bdaddr,
2157 u8 type, u32 flags)
2158{
2159 struct bdaddr_list_with_flags *entry;
2160
2161 if (!bacmp(bdaddr, BDADDR_ANY))
2162 return -EBADF;
2163
2164 if (hci_bdaddr_list_lookup(list, bdaddr, type))
2165 return -EEXIST;
2166
2167 entry = kzalloc(sizeof(*entry), GFP_KERNEL);
2168 if (!entry)
2169 return -ENOMEM;
2170
2171 bacpy(&entry->bdaddr, bdaddr);
2172 entry->bdaddr_type = type;
2173 entry->flags = flags;
2174
2175 list_add(&entry->list, list);
2176
2177 return 0;
2178}
2179
2180int hci_bdaddr_list_del(struct list_head *list, bdaddr_t *bdaddr, u8 type)
2181{
2182 struct bdaddr_list *entry;
2183
2184 if (!bacmp(bdaddr, BDADDR_ANY)) {
2185 hci_bdaddr_list_clear(list);
2186 return 0;
2187 }
2188
2189 entry = hci_bdaddr_list_lookup(list, bdaddr, type);
2190 if (!entry)
2191 return -ENOENT;
2192
2193 list_del(&entry->list);
2194 kfree(entry);
2195
2196 return 0;
2197}
2198
2199int hci_bdaddr_list_del_with_irk(struct list_head *list, bdaddr_t *bdaddr,
2200 u8 type)
2201{
2202 struct bdaddr_list_with_irk *entry;
2203
2204 if (!bacmp(bdaddr, BDADDR_ANY)) {
2205 hci_bdaddr_list_clear(list);
2206 return 0;
2207 }
2208
2209 entry = hci_bdaddr_list_lookup_with_irk(list, bdaddr, type);
2210 if (!entry)
2211 return -ENOENT;
2212
2213 list_del(&entry->list);
2214 kfree(entry);
2215
2216 return 0;
2217}
2218
2219int hci_bdaddr_list_del_with_flags(struct list_head *list, bdaddr_t *bdaddr,
2220 u8 type)
2221{
2222 struct bdaddr_list_with_flags *entry;
2223
2224 if (!bacmp(bdaddr, BDADDR_ANY)) {
2225 hci_bdaddr_list_clear(list);
2226 return 0;
2227 }
2228
2229 entry = hci_bdaddr_list_lookup_with_flags(list, bdaddr, type);
2230 if (!entry)
2231 return -ENOENT;
2232
2233 list_del(&entry->list);
2234 kfree(entry);
2235
2236 return 0;
2237}
2238
2239/* This function requires the caller holds hdev->lock */
2240struct hci_conn_params *hci_conn_params_lookup(struct hci_dev *hdev,
2241 bdaddr_t *addr, u8 addr_type)
2242{
2243 struct hci_conn_params *params;
2244
2245 list_for_each_entry(params, &hdev->le_conn_params, list) {
2246 if (bacmp(¶ms->addr, addr) == 0 &&
2247 params->addr_type == addr_type) {
2248 return params;
2249 }
2250 }
2251
2252 return NULL;
2253}
2254
2255/* This function requires the caller holds hdev->lock or rcu_read_lock */
2256struct hci_conn_params *hci_pend_le_action_lookup(struct list_head *list,
2257 bdaddr_t *addr, u8 addr_type)
2258{
2259 struct hci_conn_params *param;
2260
2261 rcu_read_lock();
2262
2263 list_for_each_entry_rcu(param, list, action) {
2264 if (bacmp(¶m->addr, addr) == 0 &&
2265 param->addr_type == addr_type) {
2266 rcu_read_unlock();
2267 return param;
2268 }
2269 }
2270
2271 rcu_read_unlock();
2272
2273 return NULL;
2274}
2275
2276/* This function requires the caller holds hdev->lock */
2277void hci_pend_le_list_del_init(struct hci_conn_params *param)
2278{
2279 if (list_empty(¶m->action))
2280 return;
2281
2282 list_del_rcu(¶m->action);
2283 synchronize_rcu();
2284 INIT_LIST_HEAD(¶m->action);
2285}
2286
2287/* This function requires the caller holds hdev->lock */
2288void hci_pend_le_list_add(struct hci_conn_params *param,
2289 struct list_head *list)
2290{
2291 list_add_rcu(¶m->action, list);
2292}
2293
2294/* This function requires the caller holds hdev->lock */
2295struct hci_conn_params *hci_conn_params_add(struct hci_dev *hdev,
2296 bdaddr_t *addr, u8 addr_type)
2297{
2298 struct hci_conn_params *params;
2299
2300 params = hci_conn_params_lookup(hdev, addr, addr_type);
2301 if (params)
2302 return params;
2303
2304 params = kzalloc(sizeof(*params), GFP_KERNEL);
2305 if (!params) {
2306 bt_dev_err(hdev, "out of memory");
2307 return NULL;
2308 }
2309
2310 bacpy(¶ms->addr, addr);
2311 params->addr_type = addr_type;
2312
2313 list_add(¶ms->list, &hdev->le_conn_params);
2314 INIT_LIST_HEAD(¶ms->action);
2315
2316 params->conn_min_interval = hdev->le_conn_min_interval;
2317 params->conn_max_interval = hdev->le_conn_max_interval;
2318 params->conn_latency = hdev->le_conn_latency;
2319 params->supervision_timeout = hdev->le_supv_timeout;
2320 params->auto_connect = HCI_AUTO_CONN_DISABLED;
2321
2322 BT_DBG("addr %pMR (type %u)", addr, addr_type);
2323
2324 return params;
2325}
2326
2327void hci_conn_params_free(struct hci_conn_params *params)
2328{
2329 hci_pend_le_list_del_init(params);
2330
2331 if (params->conn) {
2332 hci_conn_drop(params->conn);
2333 hci_conn_put(params->conn);
2334 }
2335
2336 list_del(¶ms->list);
2337 kfree(params);
2338}
2339
2340/* This function requires the caller holds hdev->lock */
2341void hci_conn_params_del(struct hci_dev *hdev, bdaddr_t *addr, u8 addr_type)
2342{
2343 struct hci_conn_params *params;
2344
2345 params = hci_conn_params_lookup(hdev, addr, addr_type);
2346 if (!params)
2347 return;
2348
2349 hci_conn_params_free(params);
2350
2351 hci_update_passive_scan(hdev);
2352
2353 BT_DBG("addr %pMR (type %u)", addr, addr_type);
2354}
2355
2356/* This function requires the caller holds hdev->lock */
2357void hci_conn_params_clear_disabled(struct hci_dev *hdev)
2358{
2359 struct hci_conn_params *params, *tmp;
2360
2361 list_for_each_entry_safe(params, tmp, &hdev->le_conn_params, list) {
2362 if (params->auto_connect != HCI_AUTO_CONN_DISABLED)
2363 continue;
2364
2365 /* If trying to establish one time connection to disabled
2366 * device, leave the params, but mark them as just once.
2367 */
2368 if (params->explicit_connect) {
2369 params->auto_connect = HCI_AUTO_CONN_EXPLICIT;
2370 continue;
2371 }
2372
2373 hci_conn_params_free(params);
2374 }
2375
2376 BT_DBG("All LE disabled connection parameters were removed");
2377}
2378
2379/* This function requires the caller holds hdev->lock */
2380static void hci_conn_params_clear_all(struct hci_dev *hdev)
2381{
2382 struct hci_conn_params *params, *tmp;
2383
2384 list_for_each_entry_safe(params, tmp, &hdev->le_conn_params, list)
2385 hci_conn_params_free(params);
2386
2387 BT_DBG("All LE connection parameters were removed");
2388}
2389
2390/* Copy the Identity Address of the controller.
2391 *
2392 * If the controller has a public BD_ADDR, then by default use that one.
2393 * If this is a LE only controller without a public address, default to
2394 * the static random address.
2395 *
2396 * For debugging purposes it is possible to force controllers with a
2397 * public address to use the static random address instead.
2398 *
2399 * In case BR/EDR has been disabled on a dual-mode controller and
2400 * userspace has configured a static address, then that address
2401 * becomes the identity address instead of the public BR/EDR address.
2402 */
2403void hci_copy_identity_address(struct hci_dev *hdev, bdaddr_t *bdaddr,
2404 u8 *bdaddr_type)
2405{
2406 if (hci_dev_test_flag(hdev, HCI_FORCE_STATIC_ADDR) ||
2407 !bacmp(&hdev->bdaddr, BDADDR_ANY) ||
2408 (!hci_dev_test_flag(hdev, HCI_BREDR_ENABLED) &&
2409 bacmp(&hdev->static_addr, BDADDR_ANY))) {
2410 bacpy(bdaddr, &hdev->static_addr);
2411 *bdaddr_type = ADDR_LE_DEV_RANDOM;
2412 } else {
2413 bacpy(bdaddr, &hdev->bdaddr);
2414 *bdaddr_type = ADDR_LE_DEV_PUBLIC;
2415 }
2416}
2417
2418static void hci_clear_wake_reason(struct hci_dev *hdev)
2419{
2420 hci_dev_lock(hdev);
2421
2422 hdev->wake_reason = 0;
2423 bacpy(&hdev->wake_addr, BDADDR_ANY);
2424 hdev->wake_addr_type = 0;
2425
2426 hci_dev_unlock(hdev);
2427}
2428
2429static int hci_suspend_notifier(struct notifier_block *nb, unsigned long action,
2430 void *data)
2431{
2432 struct hci_dev *hdev =
2433 container_of(nb, struct hci_dev, suspend_notifier);
2434 int ret = 0;
2435
2436 /* Userspace has full control of this device. Do nothing. */
2437 if (hci_dev_test_flag(hdev, HCI_USER_CHANNEL))
2438 return NOTIFY_DONE;
2439
2440 /* To avoid a potential race with hci_unregister_dev. */
2441 hci_dev_hold(hdev);
2442
2443 if (action == PM_SUSPEND_PREPARE)
2444 ret = hci_suspend_dev(hdev);
2445 else if (action == PM_POST_SUSPEND)
2446 ret = hci_resume_dev(hdev);
2447
2448 if (ret)
2449 bt_dev_err(hdev, "Suspend notifier action (%lu) failed: %d",
2450 action, ret);
2451
2452 hci_dev_put(hdev);
2453 return NOTIFY_DONE;
2454}
2455
2456/* Alloc HCI device */
2457struct hci_dev *hci_alloc_dev_priv(int sizeof_priv)
2458{
2459 struct hci_dev *hdev;
2460 unsigned int alloc_size;
2461
2462 alloc_size = sizeof(*hdev);
2463 if (sizeof_priv) {
2464 /* Fixme: May need ALIGN-ment? */
2465 alloc_size += sizeof_priv;
2466 }
2467
2468 hdev = kzalloc(alloc_size, GFP_KERNEL);
2469 if (!hdev)
2470 return NULL;
2471
2472 hdev->pkt_type = (HCI_DM1 | HCI_DH1 | HCI_HV1);
2473 hdev->esco_type = (ESCO_HV1);
2474 hdev->link_mode = (HCI_LM_ACCEPT);
2475 hdev->num_iac = 0x01; /* One IAC support is mandatory */
2476 hdev->io_capability = 0x03; /* No Input No Output */
2477 hdev->manufacturer = 0xffff; /* Default to internal use */
2478 hdev->inq_tx_power = HCI_TX_POWER_INVALID;
2479 hdev->adv_tx_power = HCI_TX_POWER_INVALID;
2480 hdev->adv_instance_cnt = 0;
2481 hdev->cur_adv_instance = 0x00;
2482 hdev->adv_instance_timeout = 0;
2483
2484 hdev->advmon_allowlist_duration = 300;
2485 hdev->advmon_no_filter_duration = 500;
2486 hdev->enable_advmon_interleave_scan = 0x00; /* Default to disable */
2487
2488 hdev->sniff_max_interval = 800;
2489 hdev->sniff_min_interval = 80;
2490
2491 hdev->le_adv_channel_map = 0x07;
2492 hdev->le_adv_min_interval = 0x0800;
2493 hdev->le_adv_max_interval = 0x0800;
2494 hdev->le_scan_interval = 0x0060;
2495 hdev->le_scan_window = 0x0030;
2496 hdev->le_scan_int_suspend = 0x0400;
2497 hdev->le_scan_window_suspend = 0x0012;
2498 hdev->le_scan_int_discovery = DISCOV_LE_SCAN_INT;
2499 hdev->le_scan_window_discovery = DISCOV_LE_SCAN_WIN;
2500 hdev->le_scan_int_adv_monitor = 0x0060;
2501 hdev->le_scan_window_adv_monitor = 0x0030;
2502 hdev->le_scan_int_connect = 0x0060;
2503 hdev->le_scan_window_connect = 0x0060;
2504 hdev->le_conn_min_interval = 0x0018;
2505 hdev->le_conn_max_interval = 0x0028;
2506 hdev->le_conn_latency = 0x0000;
2507 hdev->le_supv_timeout = 0x002a;
2508 hdev->le_def_tx_len = 0x001b;
2509 hdev->le_def_tx_time = 0x0148;
2510 hdev->le_max_tx_len = 0x001b;
2511 hdev->le_max_tx_time = 0x0148;
2512 hdev->le_max_rx_len = 0x001b;
2513 hdev->le_max_rx_time = 0x0148;
2514 hdev->le_max_key_size = SMP_MAX_ENC_KEY_SIZE;
2515 hdev->le_min_key_size = SMP_MIN_ENC_KEY_SIZE;
2516 hdev->le_tx_def_phys = HCI_LE_SET_PHY_1M;
2517 hdev->le_rx_def_phys = HCI_LE_SET_PHY_1M;
2518 hdev->le_num_of_adv_sets = HCI_MAX_ADV_INSTANCES;
2519 hdev->def_multi_adv_rotation_duration = HCI_DEFAULT_ADV_DURATION;
2520 hdev->def_le_autoconnect_timeout = HCI_LE_AUTOCONN_TIMEOUT;
2521 hdev->min_le_tx_power = HCI_TX_POWER_INVALID;
2522 hdev->max_le_tx_power = HCI_TX_POWER_INVALID;
2523
2524 hdev->rpa_timeout = HCI_DEFAULT_RPA_TIMEOUT;
2525 hdev->discov_interleaved_timeout = DISCOV_INTERLEAVED_TIMEOUT;
2526 hdev->conn_info_min_age = DEFAULT_CONN_INFO_MIN_AGE;
2527 hdev->conn_info_max_age = DEFAULT_CONN_INFO_MAX_AGE;
2528 hdev->auth_payload_timeout = DEFAULT_AUTH_PAYLOAD_TIMEOUT;
2529 hdev->min_enc_key_size = HCI_MIN_ENC_KEY_SIZE;
2530
2531 /* default 1.28 sec page scan */
2532 hdev->def_page_scan_type = PAGE_SCAN_TYPE_STANDARD;
2533 hdev->def_page_scan_int = 0x0800;
2534 hdev->def_page_scan_window = 0x0012;
2535
2536 mutex_init(&hdev->lock);
2537 mutex_init(&hdev->req_lock);
2538
2539 ida_init(&hdev->unset_handle_ida);
2540
2541 INIT_LIST_HEAD(&hdev->mesh_pending);
2542 INIT_LIST_HEAD(&hdev->mgmt_pending);
2543 INIT_LIST_HEAD(&hdev->reject_list);
2544 INIT_LIST_HEAD(&hdev->accept_list);
2545 INIT_LIST_HEAD(&hdev->uuids);
2546 INIT_LIST_HEAD(&hdev->link_keys);
2547 INIT_LIST_HEAD(&hdev->long_term_keys);
2548 INIT_LIST_HEAD(&hdev->identity_resolving_keys);
2549 INIT_LIST_HEAD(&hdev->remote_oob_data);
2550 INIT_LIST_HEAD(&hdev->le_accept_list);
2551 INIT_LIST_HEAD(&hdev->le_resolv_list);
2552 INIT_LIST_HEAD(&hdev->le_conn_params);
2553 INIT_LIST_HEAD(&hdev->pend_le_conns);
2554 INIT_LIST_HEAD(&hdev->pend_le_reports);
2555 INIT_LIST_HEAD(&hdev->conn_hash.list);
2556 INIT_LIST_HEAD(&hdev->adv_instances);
2557 INIT_LIST_HEAD(&hdev->blocked_keys);
2558 INIT_LIST_HEAD(&hdev->monitored_devices);
2559
2560 INIT_LIST_HEAD(&hdev->local_codecs);
2561 INIT_WORK(&hdev->rx_work, hci_rx_work);
2562 INIT_WORK(&hdev->cmd_work, hci_cmd_work);
2563 INIT_WORK(&hdev->tx_work, hci_tx_work);
2564 INIT_WORK(&hdev->power_on, hci_power_on);
2565 INIT_WORK(&hdev->error_reset, hci_error_reset);
2566
2567 hci_cmd_sync_init(hdev);
2568
2569 INIT_DELAYED_WORK(&hdev->power_off, hci_power_off);
2570
2571 skb_queue_head_init(&hdev->rx_q);
2572 skb_queue_head_init(&hdev->cmd_q);
2573 skb_queue_head_init(&hdev->raw_q);
2574
2575 init_waitqueue_head(&hdev->req_wait_q);
2576
2577 INIT_DELAYED_WORK(&hdev->cmd_timer, hci_cmd_timeout);
2578 INIT_DELAYED_WORK(&hdev->ncmd_timer, hci_ncmd_timeout);
2579
2580 hci_devcd_setup(hdev);
2581 hci_request_setup(hdev);
2582
2583 hci_init_sysfs(hdev);
2584 discovery_init(hdev);
2585
2586 return hdev;
2587}
2588EXPORT_SYMBOL(hci_alloc_dev_priv);
2589
2590/* Free HCI device */
2591void hci_free_dev(struct hci_dev *hdev)
2592{
2593 /* will free via device release */
2594 put_device(&hdev->dev);
2595}
2596EXPORT_SYMBOL(hci_free_dev);
2597
2598/* Register HCI device */
2599int hci_register_dev(struct hci_dev *hdev)
2600{
2601 int id, error;
2602
2603 if (!hdev->open || !hdev->close || !hdev->send)
2604 return -EINVAL;
2605
2606 /* Do not allow HCI_AMP devices to register at index 0,
2607 * so the index can be used as the AMP controller ID.
2608 */
2609 switch (hdev->dev_type) {
2610 case HCI_PRIMARY:
2611 id = ida_simple_get(&hci_index_ida, 0, HCI_MAX_ID, GFP_KERNEL);
2612 break;
2613 case HCI_AMP:
2614 id = ida_simple_get(&hci_index_ida, 1, HCI_MAX_ID, GFP_KERNEL);
2615 break;
2616 default:
2617 return -EINVAL;
2618 }
2619
2620 if (id < 0)
2621 return id;
2622
2623 error = dev_set_name(&hdev->dev, "hci%u", id);
2624 if (error)
2625 return error;
2626
2627 hdev->name = dev_name(&hdev->dev);
2628 hdev->id = id;
2629
2630 BT_DBG("%p name %s bus %d", hdev, hdev->name, hdev->bus);
2631
2632 hdev->workqueue = alloc_ordered_workqueue("%s", WQ_HIGHPRI, hdev->name);
2633 if (!hdev->workqueue) {
2634 error = -ENOMEM;
2635 goto err;
2636 }
2637
2638 hdev->req_workqueue = alloc_ordered_workqueue("%s", WQ_HIGHPRI,
2639 hdev->name);
2640 if (!hdev->req_workqueue) {
2641 destroy_workqueue(hdev->workqueue);
2642 error = -ENOMEM;
2643 goto err;
2644 }
2645
2646 if (!IS_ERR_OR_NULL(bt_debugfs))
2647 hdev->debugfs = debugfs_create_dir(hdev->name, bt_debugfs);
2648
2649 error = device_add(&hdev->dev);
2650 if (error < 0)
2651 goto err_wqueue;
2652
2653 hci_leds_init(hdev);
2654
2655 hdev->rfkill = rfkill_alloc(hdev->name, &hdev->dev,
2656 RFKILL_TYPE_BLUETOOTH, &hci_rfkill_ops,
2657 hdev);
2658 if (hdev->rfkill) {
2659 if (rfkill_register(hdev->rfkill) < 0) {
2660 rfkill_destroy(hdev->rfkill);
2661 hdev->rfkill = NULL;
2662 }
2663 }
2664
2665 if (hdev->rfkill && rfkill_blocked(hdev->rfkill))
2666 hci_dev_set_flag(hdev, HCI_RFKILLED);
2667
2668 hci_dev_set_flag(hdev, HCI_SETUP);
2669 hci_dev_set_flag(hdev, HCI_AUTO_OFF);
2670
2671 if (hdev->dev_type == HCI_PRIMARY) {
2672 /* Assume BR/EDR support until proven otherwise (such as
2673 * through reading supported features during init.
2674 */
2675 hci_dev_set_flag(hdev, HCI_BREDR_ENABLED);
2676 }
2677
2678 write_lock(&hci_dev_list_lock);
2679 list_add(&hdev->list, &hci_dev_list);
2680 write_unlock(&hci_dev_list_lock);
2681
2682 /* Devices that are marked for raw-only usage are unconfigured
2683 * and should not be included in normal operation.
2684 */
2685 if (test_bit(HCI_QUIRK_RAW_DEVICE, &hdev->quirks))
2686 hci_dev_set_flag(hdev, HCI_UNCONFIGURED);
2687
2688 /* Mark Remote Wakeup connection flag as supported if driver has wakeup
2689 * callback.
2690 */
2691 if (hdev->wakeup)
2692 hdev->conn_flags |= HCI_CONN_FLAG_REMOTE_WAKEUP;
2693
2694 hci_sock_dev_event(hdev, HCI_DEV_REG);
2695 hci_dev_hold(hdev);
2696
2697 error = hci_register_suspend_notifier(hdev);
2698 if (error)
2699 BT_WARN("register suspend notifier failed error:%d\n", error);
2700
2701 queue_work(hdev->req_workqueue, &hdev->power_on);
2702
2703 idr_init(&hdev->adv_monitors_idr);
2704 msft_register(hdev);
2705
2706 return id;
2707
2708err_wqueue:
2709 debugfs_remove_recursive(hdev->debugfs);
2710 destroy_workqueue(hdev->workqueue);
2711 destroy_workqueue(hdev->req_workqueue);
2712err:
2713 ida_simple_remove(&hci_index_ida, hdev->id);
2714
2715 return error;
2716}
2717EXPORT_SYMBOL(hci_register_dev);
2718
2719/* Unregister HCI device */
2720void hci_unregister_dev(struct hci_dev *hdev)
2721{
2722 BT_DBG("%p name %s bus %d", hdev, hdev->name, hdev->bus);
2723
2724 mutex_lock(&hdev->unregister_lock);
2725 hci_dev_set_flag(hdev, HCI_UNREGISTER);
2726 mutex_unlock(&hdev->unregister_lock);
2727
2728 write_lock(&hci_dev_list_lock);
2729 list_del(&hdev->list);
2730 write_unlock(&hci_dev_list_lock);
2731
2732 cancel_work_sync(&hdev->power_on);
2733
2734 hci_cmd_sync_clear(hdev);
2735
2736 hci_unregister_suspend_notifier(hdev);
2737
2738 msft_unregister(hdev);
2739
2740 hci_dev_do_close(hdev);
2741
2742 if (!test_bit(HCI_INIT, &hdev->flags) &&
2743 !hci_dev_test_flag(hdev, HCI_SETUP) &&
2744 !hci_dev_test_flag(hdev, HCI_CONFIG)) {
2745 hci_dev_lock(hdev);
2746 mgmt_index_removed(hdev);
2747 hci_dev_unlock(hdev);
2748 }
2749
2750 /* mgmt_index_removed should take care of emptying the
2751 * pending list */
2752 BUG_ON(!list_empty(&hdev->mgmt_pending));
2753
2754 hci_sock_dev_event(hdev, HCI_DEV_UNREG);
2755
2756 if (hdev->rfkill) {
2757 rfkill_unregister(hdev->rfkill);
2758 rfkill_destroy(hdev->rfkill);
2759 }
2760
2761 device_del(&hdev->dev);
2762 /* Actual cleanup is deferred until hci_release_dev(). */
2763 hci_dev_put(hdev);
2764}
2765EXPORT_SYMBOL(hci_unregister_dev);
2766
2767/* Release HCI device */
2768void hci_release_dev(struct hci_dev *hdev)
2769{
2770 debugfs_remove_recursive(hdev->debugfs);
2771 kfree_const(hdev->hw_info);
2772 kfree_const(hdev->fw_info);
2773
2774 destroy_workqueue(hdev->workqueue);
2775 destroy_workqueue(hdev->req_workqueue);
2776
2777 hci_dev_lock(hdev);
2778 hci_bdaddr_list_clear(&hdev->reject_list);
2779 hci_bdaddr_list_clear(&hdev->accept_list);
2780 hci_uuids_clear(hdev);
2781 hci_link_keys_clear(hdev);
2782 hci_smp_ltks_clear(hdev);
2783 hci_smp_irks_clear(hdev);
2784 hci_remote_oob_data_clear(hdev);
2785 hci_adv_instances_clear(hdev);
2786 hci_adv_monitors_clear(hdev);
2787 hci_bdaddr_list_clear(&hdev->le_accept_list);
2788 hci_bdaddr_list_clear(&hdev->le_resolv_list);
2789 hci_conn_params_clear_all(hdev);
2790 hci_discovery_filter_clear(hdev);
2791 hci_blocked_keys_clear(hdev);
2792 hci_codec_list_clear(&hdev->local_codecs);
2793 hci_dev_unlock(hdev);
2794
2795 ida_destroy(&hdev->unset_handle_ida);
2796 ida_simple_remove(&hci_index_ida, hdev->id);
2797 kfree_skb(hdev->sent_cmd);
2798 kfree_skb(hdev->recv_event);
2799 kfree(hdev);
2800}
2801EXPORT_SYMBOL(hci_release_dev);
2802
2803int hci_register_suspend_notifier(struct hci_dev *hdev)
2804{
2805 int ret = 0;
2806
2807 if (!hdev->suspend_notifier.notifier_call &&
2808 !test_bit(HCI_QUIRK_NO_SUSPEND_NOTIFIER, &hdev->quirks)) {
2809 hdev->suspend_notifier.notifier_call = hci_suspend_notifier;
2810 ret = register_pm_notifier(&hdev->suspend_notifier);
2811 }
2812
2813 return ret;
2814}
2815
2816int hci_unregister_suspend_notifier(struct hci_dev *hdev)
2817{
2818 int ret = 0;
2819
2820 if (hdev->suspend_notifier.notifier_call) {
2821 ret = unregister_pm_notifier(&hdev->suspend_notifier);
2822 if (!ret)
2823 hdev->suspend_notifier.notifier_call = NULL;
2824 }
2825
2826 return ret;
2827}
2828
2829/* Suspend HCI device */
2830int hci_suspend_dev(struct hci_dev *hdev)
2831{
2832 int ret;
2833
2834 bt_dev_dbg(hdev, "");
2835
2836 /* Suspend should only act on when powered. */
2837 if (!hdev_is_powered(hdev) ||
2838 hci_dev_test_flag(hdev, HCI_UNREGISTER))
2839 return 0;
2840
2841 /* If powering down don't attempt to suspend */
2842 if (mgmt_powering_down(hdev))
2843 return 0;
2844
2845 /* Cancel potentially blocking sync operation before suspend */
2846 __hci_cmd_sync_cancel(hdev, -EHOSTDOWN);
2847
2848 hci_req_sync_lock(hdev);
2849 ret = hci_suspend_sync(hdev);
2850 hci_req_sync_unlock(hdev);
2851
2852 hci_clear_wake_reason(hdev);
2853 mgmt_suspending(hdev, hdev->suspend_state);
2854
2855 hci_sock_dev_event(hdev, HCI_DEV_SUSPEND);
2856 return ret;
2857}
2858EXPORT_SYMBOL(hci_suspend_dev);
2859
2860/* Resume HCI device */
2861int hci_resume_dev(struct hci_dev *hdev)
2862{
2863 int ret;
2864
2865 bt_dev_dbg(hdev, "");
2866
2867 /* Resume should only act on when powered. */
2868 if (!hdev_is_powered(hdev) ||
2869 hci_dev_test_flag(hdev, HCI_UNREGISTER))
2870 return 0;
2871
2872 /* If powering down don't attempt to resume */
2873 if (mgmt_powering_down(hdev))
2874 return 0;
2875
2876 hci_req_sync_lock(hdev);
2877 ret = hci_resume_sync(hdev);
2878 hci_req_sync_unlock(hdev);
2879
2880 mgmt_resuming(hdev, hdev->wake_reason, &hdev->wake_addr,
2881 hdev->wake_addr_type);
2882
2883 hci_sock_dev_event(hdev, HCI_DEV_RESUME);
2884 return ret;
2885}
2886EXPORT_SYMBOL(hci_resume_dev);
2887
2888/* Reset HCI device */
2889int hci_reset_dev(struct hci_dev *hdev)
2890{
2891 static const u8 hw_err[] = { HCI_EV_HARDWARE_ERROR, 0x01, 0x00 };
2892 struct sk_buff *skb;
2893
2894 skb = bt_skb_alloc(3, GFP_ATOMIC);
2895 if (!skb)
2896 return -ENOMEM;
2897
2898 hci_skb_pkt_type(skb) = HCI_EVENT_PKT;
2899 skb_put_data(skb, hw_err, 3);
2900
2901 bt_dev_err(hdev, "Injecting HCI hardware error event");
2902
2903 /* Send Hardware Error to upper stack */
2904 return hci_recv_frame(hdev, skb);
2905}
2906EXPORT_SYMBOL(hci_reset_dev);
2907
2908/* Receive frame from HCI drivers */
2909int hci_recv_frame(struct hci_dev *hdev, struct sk_buff *skb)
2910{
2911 if (!hdev || (!test_bit(HCI_UP, &hdev->flags)
2912 && !test_bit(HCI_INIT, &hdev->flags))) {
2913 kfree_skb(skb);
2914 return -ENXIO;
2915 }
2916
2917 switch (hci_skb_pkt_type(skb)) {
2918 case HCI_EVENT_PKT:
2919 break;
2920 case HCI_ACLDATA_PKT:
2921 /* Detect if ISO packet has been sent as ACL */
2922 if (hci_conn_num(hdev, ISO_LINK)) {
2923 __u16 handle = __le16_to_cpu(hci_acl_hdr(skb)->handle);
2924 __u8 type;
2925
2926 type = hci_conn_lookup_type(hdev, hci_handle(handle));
2927 if (type == ISO_LINK)
2928 hci_skb_pkt_type(skb) = HCI_ISODATA_PKT;
2929 }
2930 break;
2931 case HCI_SCODATA_PKT:
2932 break;
2933 case HCI_ISODATA_PKT:
2934 break;
2935 default:
2936 kfree_skb(skb);
2937 return -EINVAL;
2938 }
2939
2940 /* Incoming skb */
2941 bt_cb(skb)->incoming = 1;
2942
2943 /* Time stamp */
2944 __net_timestamp(skb);
2945
2946 skb_queue_tail(&hdev->rx_q, skb);
2947 queue_work(hdev->workqueue, &hdev->rx_work);
2948
2949 return 0;
2950}
2951EXPORT_SYMBOL(hci_recv_frame);
2952
2953/* Receive diagnostic message from HCI drivers */
2954int hci_recv_diag(struct hci_dev *hdev, struct sk_buff *skb)
2955{
2956 /* Mark as diagnostic packet */
2957 hci_skb_pkt_type(skb) = HCI_DIAG_PKT;
2958
2959 /* Time stamp */
2960 __net_timestamp(skb);
2961
2962 skb_queue_tail(&hdev->rx_q, skb);
2963 queue_work(hdev->workqueue, &hdev->rx_work);
2964
2965 return 0;
2966}
2967EXPORT_SYMBOL(hci_recv_diag);
2968
2969void hci_set_hw_info(struct hci_dev *hdev, const char *fmt, ...)
2970{
2971 va_list vargs;
2972
2973 va_start(vargs, fmt);
2974 kfree_const(hdev->hw_info);
2975 hdev->hw_info = kvasprintf_const(GFP_KERNEL, fmt, vargs);
2976 va_end(vargs);
2977}
2978EXPORT_SYMBOL(hci_set_hw_info);
2979
2980void hci_set_fw_info(struct hci_dev *hdev, const char *fmt, ...)
2981{
2982 va_list vargs;
2983
2984 va_start(vargs, fmt);
2985 kfree_const(hdev->fw_info);
2986 hdev->fw_info = kvasprintf_const(GFP_KERNEL, fmt, vargs);
2987 va_end(vargs);
2988}
2989EXPORT_SYMBOL(hci_set_fw_info);
2990
2991/* ---- Interface to upper protocols ---- */
2992
2993int hci_register_cb(struct hci_cb *cb)
2994{
2995 BT_DBG("%p name %s", cb, cb->name);
2996
2997 mutex_lock(&hci_cb_list_lock);
2998 list_add_tail(&cb->list, &hci_cb_list);
2999 mutex_unlock(&hci_cb_list_lock);
3000
3001 return 0;
3002}
3003EXPORT_SYMBOL(hci_register_cb);
3004
3005int hci_unregister_cb(struct hci_cb *cb)
3006{
3007 BT_DBG("%p name %s", cb, cb->name);
3008
3009 mutex_lock(&hci_cb_list_lock);
3010 list_del(&cb->list);
3011 mutex_unlock(&hci_cb_list_lock);
3012
3013 return 0;
3014}
3015EXPORT_SYMBOL(hci_unregister_cb);
3016
3017static int hci_send_frame(struct hci_dev *hdev, struct sk_buff *skb)
3018{
3019 int err;
3020
3021 BT_DBG("%s type %d len %d", hdev->name, hci_skb_pkt_type(skb),
3022 skb->len);
3023
3024 /* Time stamp */
3025 __net_timestamp(skb);
3026
3027 /* Send copy to monitor */
3028 hci_send_to_monitor(hdev, skb);
3029
3030 if (atomic_read(&hdev->promisc)) {
3031 /* Send copy to the sockets */
3032 hci_send_to_sock(hdev, skb);
3033 }
3034
3035 /* Get rid of skb owner, prior to sending to the driver. */
3036 skb_orphan(skb);
3037
3038 if (!test_bit(HCI_RUNNING, &hdev->flags)) {
3039 kfree_skb(skb);
3040 return -EINVAL;
3041 }
3042
3043 err = hdev->send(hdev, skb);
3044 if (err < 0) {
3045 bt_dev_err(hdev, "sending frame failed (%d)", err);
3046 kfree_skb(skb);
3047 return err;
3048 }
3049
3050 return 0;
3051}
3052
3053/* Send HCI command */
3054int hci_send_cmd(struct hci_dev *hdev, __u16 opcode, __u32 plen,
3055 const void *param)
3056{
3057 struct sk_buff *skb;
3058
3059 BT_DBG("%s opcode 0x%4.4x plen %d", hdev->name, opcode, plen);
3060
3061 skb = hci_prepare_cmd(hdev, opcode, plen, param);
3062 if (!skb) {
3063 bt_dev_err(hdev, "no memory for command");
3064 return -ENOMEM;
3065 }
3066
3067 /* Stand-alone HCI commands must be flagged as
3068 * single-command requests.
3069 */
3070 bt_cb(skb)->hci.req_flags |= HCI_REQ_START;
3071
3072 skb_queue_tail(&hdev->cmd_q, skb);
3073 queue_work(hdev->workqueue, &hdev->cmd_work);
3074
3075 return 0;
3076}
3077
3078int __hci_cmd_send(struct hci_dev *hdev, u16 opcode, u32 plen,
3079 const void *param)
3080{
3081 struct sk_buff *skb;
3082
3083 if (hci_opcode_ogf(opcode) != 0x3f) {
3084 /* A controller receiving a command shall respond with either
3085 * a Command Status Event or a Command Complete Event.
3086 * Therefore, all standard HCI commands must be sent via the
3087 * standard API, using hci_send_cmd or hci_cmd_sync helpers.
3088 * Some vendors do not comply with this rule for vendor-specific
3089 * commands and do not return any event. We want to support
3090 * unresponded commands for such cases only.
3091 */
3092 bt_dev_err(hdev, "unresponded command not supported");
3093 return -EINVAL;
3094 }
3095
3096 skb = hci_prepare_cmd(hdev, opcode, plen, param);
3097 if (!skb) {
3098 bt_dev_err(hdev, "no memory for command (opcode 0x%4.4x)",
3099 opcode);
3100 return -ENOMEM;
3101 }
3102
3103 hci_send_frame(hdev, skb);
3104
3105 return 0;
3106}
3107EXPORT_SYMBOL(__hci_cmd_send);
3108
3109/* Get data from the previously sent command */
3110void *hci_sent_cmd_data(struct hci_dev *hdev, __u16 opcode)
3111{
3112 struct hci_command_hdr *hdr;
3113
3114 if (!hdev->sent_cmd)
3115 return NULL;
3116
3117 hdr = (void *) hdev->sent_cmd->data;
3118
3119 if (hdr->opcode != cpu_to_le16(opcode))
3120 return NULL;
3121
3122 BT_DBG("%s opcode 0x%4.4x", hdev->name, opcode);
3123
3124 return hdev->sent_cmd->data + HCI_COMMAND_HDR_SIZE;
3125}
3126
3127/* Get data from last received event */
3128void *hci_recv_event_data(struct hci_dev *hdev, __u8 event)
3129{
3130 struct hci_event_hdr *hdr;
3131 int offset;
3132
3133 if (!hdev->recv_event)
3134 return NULL;
3135
3136 hdr = (void *)hdev->recv_event->data;
3137 offset = sizeof(*hdr);
3138
3139 if (hdr->evt != event) {
3140 /* In case of LE metaevent check the subevent match */
3141 if (hdr->evt == HCI_EV_LE_META) {
3142 struct hci_ev_le_meta *ev;
3143
3144 ev = (void *)hdev->recv_event->data + offset;
3145 offset += sizeof(*ev);
3146 if (ev->subevent == event)
3147 goto found;
3148 }
3149 return NULL;
3150 }
3151
3152found:
3153 bt_dev_dbg(hdev, "event 0x%2.2x", event);
3154
3155 return hdev->recv_event->data + offset;
3156}
3157
3158/* Send ACL data */
3159static void hci_add_acl_hdr(struct sk_buff *skb, __u16 handle, __u16 flags)
3160{
3161 struct hci_acl_hdr *hdr;
3162 int len = skb->len;
3163
3164 skb_push(skb, HCI_ACL_HDR_SIZE);
3165 skb_reset_transport_header(skb);
3166 hdr = (struct hci_acl_hdr *)skb_transport_header(skb);
3167 hdr->handle = cpu_to_le16(hci_handle_pack(handle, flags));
3168 hdr->dlen = cpu_to_le16(len);
3169}
3170
3171static void hci_queue_acl(struct hci_chan *chan, struct sk_buff_head *queue,
3172 struct sk_buff *skb, __u16 flags)
3173{
3174 struct hci_conn *conn = chan->conn;
3175 struct hci_dev *hdev = conn->hdev;
3176 struct sk_buff *list;
3177
3178 skb->len = skb_headlen(skb);
3179 skb->data_len = 0;
3180
3181 hci_skb_pkt_type(skb) = HCI_ACLDATA_PKT;
3182
3183 switch (hdev->dev_type) {
3184 case HCI_PRIMARY:
3185 hci_add_acl_hdr(skb, conn->handle, flags);
3186 break;
3187 case HCI_AMP:
3188 hci_add_acl_hdr(skb, chan->handle, flags);
3189 break;
3190 default:
3191 bt_dev_err(hdev, "unknown dev_type %d", hdev->dev_type);
3192 return;
3193 }
3194
3195 list = skb_shinfo(skb)->frag_list;
3196 if (!list) {
3197 /* Non fragmented */
3198 BT_DBG("%s nonfrag skb %p len %d", hdev->name, skb, skb->len);
3199
3200 skb_queue_tail(queue, skb);
3201 } else {
3202 /* Fragmented */
3203 BT_DBG("%s frag %p len %d", hdev->name, skb, skb->len);
3204
3205 skb_shinfo(skb)->frag_list = NULL;
3206
3207 /* Queue all fragments atomically. We need to use spin_lock_bh
3208 * here because of 6LoWPAN links, as there this function is
3209 * called from softirq and using normal spin lock could cause
3210 * deadlocks.
3211 */
3212 spin_lock_bh(&queue->lock);
3213
3214 __skb_queue_tail(queue, skb);
3215
3216 flags &= ~ACL_START;
3217 flags |= ACL_CONT;
3218 do {
3219 skb = list; list = list->next;
3220
3221 hci_skb_pkt_type(skb) = HCI_ACLDATA_PKT;
3222 hci_add_acl_hdr(skb, conn->handle, flags);
3223
3224 BT_DBG("%s frag %p len %d", hdev->name, skb, skb->len);
3225
3226 __skb_queue_tail(queue, skb);
3227 } while (list);
3228
3229 spin_unlock_bh(&queue->lock);
3230 }
3231}
3232
3233void hci_send_acl(struct hci_chan *chan, struct sk_buff *skb, __u16 flags)
3234{
3235 struct hci_dev *hdev = chan->conn->hdev;
3236
3237 BT_DBG("%s chan %p flags 0x%4.4x", hdev->name, chan, flags);
3238
3239 hci_queue_acl(chan, &chan->data_q, skb, flags);
3240
3241 queue_work(hdev->workqueue, &hdev->tx_work);
3242}
3243
3244/* Send SCO data */
3245void hci_send_sco(struct hci_conn *conn, struct sk_buff *skb)
3246{
3247 struct hci_dev *hdev = conn->hdev;
3248 struct hci_sco_hdr hdr;
3249
3250 BT_DBG("%s len %d", hdev->name, skb->len);
3251
3252 hdr.handle = cpu_to_le16(conn->handle);
3253 hdr.dlen = skb->len;
3254
3255 skb_push(skb, HCI_SCO_HDR_SIZE);
3256 skb_reset_transport_header(skb);
3257 memcpy(skb_transport_header(skb), &hdr, HCI_SCO_HDR_SIZE);
3258
3259 hci_skb_pkt_type(skb) = HCI_SCODATA_PKT;
3260
3261 skb_queue_tail(&conn->data_q, skb);
3262 queue_work(hdev->workqueue, &hdev->tx_work);
3263}
3264
3265/* Send ISO data */
3266static void hci_add_iso_hdr(struct sk_buff *skb, __u16 handle, __u8 flags)
3267{
3268 struct hci_iso_hdr *hdr;
3269 int len = skb->len;
3270
3271 skb_push(skb, HCI_ISO_HDR_SIZE);
3272 skb_reset_transport_header(skb);
3273 hdr = (struct hci_iso_hdr *)skb_transport_header(skb);
3274 hdr->handle = cpu_to_le16(hci_handle_pack(handle, flags));
3275 hdr->dlen = cpu_to_le16(len);
3276}
3277
3278static void hci_queue_iso(struct hci_conn *conn, struct sk_buff_head *queue,
3279 struct sk_buff *skb)
3280{
3281 struct hci_dev *hdev = conn->hdev;
3282 struct sk_buff *list;
3283 __u16 flags;
3284
3285 skb->len = skb_headlen(skb);
3286 skb->data_len = 0;
3287
3288 hci_skb_pkt_type(skb) = HCI_ISODATA_PKT;
3289
3290 list = skb_shinfo(skb)->frag_list;
3291
3292 flags = hci_iso_flags_pack(list ? ISO_START : ISO_SINGLE, 0x00);
3293 hci_add_iso_hdr(skb, conn->handle, flags);
3294
3295 if (!list) {
3296 /* Non fragmented */
3297 BT_DBG("%s nonfrag skb %p len %d", hdev->name, skb, skb->len);
3298
3299 skb_queue_tail(queue, skb);
3300 } else {
3301 /* Fragmented */
3302 BT_DBG("%s frag %p len %d", hdev->name, skb, skb->len);
3303
3304 skb_shinfo(skb)->frag_list = NULL;
3305
3306 __skb_queue_tail(queue, skb);
3307
3308 do {
3309 skb = list; list = list->next;
3310
3311 hci_skb_pkt_type(skb) = HCI_ISODATA_PKT;
3312 flags = hci_iso_flags_pack(list ? ISO_CONT : ISO_END,
3313 0x00);
3314 hci_add_iso_hdr(skb, conn->handle, flags);
3315
3316 BT_DBG("%s frag %p len %d", hdev->name, skb, skb->len);
3317
3318 __skb_queue_tail(queue, skb);
3319 } while (list);
3320 }
3321}
3322
3323void hci_send_iso(struct hci_conn *conn, struct sk_buff *skb)
3324{
3325 struct hci_dev *hdev = conn->hdev;
3326
3327 BT_DBG("%s len %d", hdev->name, skb->len);
3328
3329 hci_queue_iso(conn, &conn->data_q, skb);
3330
3331 queue_work(hdev->workqueue, &hdev->tx_work);
3332}
3333
3334/* ---- HCI TX task (outgoing data) ---- */
3335
3336/* HCI Connection scheduler */
3337static inline void hci_quote_sent(struct hci_conn *conn, int num, int *quote)
3338{
3339 struct hci_dev *hdev;
3340 int cnt, q;
3341
3342 if (!conn) {
3343 *quote = 0;
3344 return;
3345 }
3346
3347 hdev = conn->hdev;
3348
3349 switch (conn->type) {
3350 case ACL_LINK:
3351 cnt = hdev->acl_cnt;
3352 break;
3353 case AMP_LINK:
3354 cnt = hdev->block_cnt;
3355 break;
3356 case SCO_LINK:
3357 case ESCO_LINK:
3358 cnt = hdev->sco_cnt;
3359 break;
3360 case LE_LINK:
3361 cnt = hdev->le_mtu ? hdev->le_cnt : hdev->acl_cnt;
3362 break;
3363 case ISO_LINK:
3364 cnt = hdev->iso_mtu ? hdev->iso_cnt :
3365 hdev->le_mtu ? hdev->le_cnt : hdev->acl_cnt;
3366 break;
3367 default:
3368 cnt = 0;
3369 bt_dev_err(hdev, "unknown link type %d", conn->type);
3370 }
3371
3372 q = cnt / num;
3373 *quote = q ? q : 1;
3374}
3375
3376static struct hci_conn *hci_low_sent(struct hci_dev *hdev, __u8 type,
3377 int *quote)
3378{
3379 struct hci_conn_hash *h = &hdev->conn_hash;
3380 struct hci_conn *conn = NULL, *c;
3381 unsigned int num = 0, min = ~0;
3382
3383 /* We don't have to lock device here. Connections are always
3384 * added and removed with TX task disabled. */
3385
3386 rcu_read_lock();
3387
3388 list_for_each_entry_rcu(c, &h->list, list) {
3389 if (c->type != type || skb_queue_empty(&c->data_q))
3390 continue;
3391
3392 if (c->state != BT_CONNECTED && c->state != BT_CONFIG)
3393 continue;
3394
3395 num++;
3396
3397 if (c->sent < min) {
3398 min = c->sent;
3399 conn = c;
3400 }
3401
3402 if (hci_conn_num(hdev, type) == num)
3403 break;
3404 }
3405
3406 rcu_read_unlock();
3407
3408 hci_quote_sent(conn, num, quote);
3409
3410 BT_DBG("conn %p quote %d", conn, *quote);
3411 return conn;
3412}
3413
3414static void hci_link_tx_to(struct hci_dev *hdev, __u8 type)
3415{
3416 struct hci_conn_hash *h = &hdev->conn_hash;
3417 struct hci_conn *c;
3418
3419 bt_dev_err(hdev, "link tx timeout");
3420
3421 rcu_read_lock();
3422
3423 /* Kill stalled connections */
3424 list_for_each_entry_rcu(c, &h->list, list) {
3425 if (c->type == type && c->sent) {
3426 bt_dev_err(hdev, "killing stalled connection %pMR",
3427 &c->dst);
3428 /* hci_disconnect might sleep, so, we have to release
3429 * the RCU read lock before calling it.
3430 */
3431 rcu_read_unlock();
3432 hci_disconnect(c, HCI_ERROR_REMOTE_USER_TERM);
3433 rcu_read_lock();
3434 }
3435 }
3436
3437 rcu_read_unlock();
3438}
3439
3440static struct hci_chan *hci_chan_sent(struct hci_dev *hdev, __u8 type,
3441 int *quote)
3442{
3443 struct hci_conn_hash *h = &hdev->conn_hash;
3444 struct hci_chan *chan = NULL;
3445 unsigned int num = 0, min = ~0, cur_prio = 0;
3446 struct hci_conn *conn;
3447 int conn_num = 0;
3448
3449 BT_DBG("%s", hdev->name);
3450
3451 rcu_read_lock();
3452
3453 list_for_each_entry_rcu(conn, &h->list, list) {
3454 struct hci_chan *tmp;
3455
3456 if (conn->type != type)
3457 continue;
3458
3459 if (conn->state != BT_CONNECTED && conn->state != BT_CONFIG)
3460 continue;
3461
3462 conn_num++;
3463
3464 list_for_each_entry_rcu(tmp, &conn->chan_list, list) {
3465 struct sk_buff *skb;
3466
3467 if (skb_queue_empty(&tmp->data_q))
3468 continue;
3469
3470 skb = skb_peek(&tmp->data_q);
3471 if (skb->priority < cur_prio)
3472 continue;
3473
3474 if (skb->priority > cur_prio) {
3475 num = 0;
3476 min = ~0;
3477 cur_prio = skb->priority;
3478 }
3479
3480 num++;
3481
3482 if (conn->sent < min) {
3483 min = conn->sent;
3484 chan = tmp;
3485 }
3486 }
3487
3488 if (hci_conn_num(hdev, type) == conn_num)
3489 break;
3490 }
3491
3492 rcu_read_unlock();
3493
3494 if (!chan)
3495 return NULL;
3496
3497 hci_quote_sent(chan->conn, num, quote);
3498
3499 BT_DBG("chan %p quote %d", chan, *quote);
3500 return chan;
3501}
3502
3503static void hci_prio_recalculate(struct hci_dev *hdev, __u8 type)
3504{
3505 struct hci_conn_hash *h = &hdev->conn_hash;
3506 struct hci_conn *conn;
3507 int num = 0;
3508
3509 BT_DBG("%s", hdev->name);
3510
3511 rcu_read_lock();
3512
3513 list_for_each_entry_rcu(conn, &h->list, list) {
3514 struct hci_chan *chan;
3515
3516 if (conn->type != type)
3517 continue;
3518
3519 if (conn->state != BT_CONNECTED && conn->state != BT_CONFIG)
3520 continue;
3521
3522 num++;
3523
3524 list_for_each_entry_rcu(chan, &conn->chan_list, list) {
3525 struct sk_buff *skb;
3526
3527 if (chan->sent) {
3528 chan->sent = 0;
3529 continue;
3530 }
3531
3532 if (skb_queue_empty(&chan->data_q))
3533 continue;
3534
3535 skb = skb_peek(&chan->data_q);
3536 if (skb->priority >= HCI_PRIO_MAX - 1)
3537 continue;
3538
3539 skb->priority = HCI_PRIO_MAX - 1;
3540
3541 BT_DBG("chan %p skb %p promoted to %d", chan, skb,
3542 skb->priority);
3543 }
3544
3545 if (hci_conn_num(hdev, type) == num)
3546 break;
3547 }
3548
3549 rcu_read_unlock();
3550
3551}
3552
3553static inline int __get_blocks(struct hci_dev *hdev, struct sk_buff *skb)
3554{
3555 /* Calculate count of blocks used by this packet */
3556 return DIV_ROUND_UP(skb->len - HCI_ACL_HDR_SIZE, hdev->block_len);
3557}
3558
3559static void __check_timeout(struct hci_dev *hdev, unsigned int cnt, u8 type)
3560{
3561 unsigned long last_tx;
3562
3563 if (hci_dev_test_flag(hdev, HCI_UNCONFIGURED))
3564 return;
3565
3566 switch (type) {
3567 case LE_LINK:
3568 last_tx = hdev->le_last_tx;
3569 break;
3570 default:
3571 last_tx = hdev->acl_last_tx;
3572 break;
3573 }
3574
3575 /* tx timeout must be longer than maximum link supervision timeout
3576 * (40.9 seconds)
3577 */
3578 if (!cnt && time_after(jiffies, last_tx + HCI_ACL_TX_TIMEOUT))
3579 hci_link_tx_to(hdev, type);
3580}
3581
3582/* Schedule SCO */
3583static void hci_sched_sco(struct hci_dev *hdev)
3584{
3585 struct hci_conn *conn;
3586 struct sk_buff *skb;
3587 int quote;
3588
3589 BT_DBG("%s", hdev->name);
3590
3591 if (!hci_conn_num(hdev, SCO_LINK))
3592 return;
3593
3594 while (hdev->sco_cnt && (conn = hci_low_sent(hdev, SCO_LINK, "e))) {
3595 while (quote-- && (skb = skb_dequeue(&conn->data_q))) {
3596 BT_DBG("skb %p len %d", skb, skb->len);
3597 hci_send_frame(hdev, skb);
3598
3599 conn->sent++;
3600 if (conn->sent == ~0)
3601 conn->sent = 0;
3602 }
3603 }
3604}
3605
3606static void hci_sched_esco(struct hci_dev *hdev)
3607{
3608 struct hci_conn *conn;
3609 struct sk_buff *skb;
3610 int quote;
3611
3612 BT_DBG("%s", hdev->name);
3613
3614 if (!hci_conn_num(hdev, ESCO_LINK))
3615 return;
3616
3617 while (hdev->sco_cnt && (conn = hci_low_sent(hdev, ESCO_LINK,
3618 "e))) {
3619 while (quote-- && (skb = skb_dequeue(&conn->data_q))) {
3620 BT_DBG("skb %p len %d", skb, skb->len);
3621 hci_send_frame(hdev, skb);
3622
3623 conn->sent++;
3624 if (conn->sent == ~0)
3625 conn->sent = 0;
3626 }
3627 }
3628}
3629
3630static void hci_sched_acl_pkt(struct hci_dev *hdev)
3631{
3632 unsigned int cnt = hdev->acl_cnt;
3633 struct hci_chan *chan;
3634 struct sk_buff *skb;
3635 int quote;
3636
3637 __check_timeout(hdev, cnt, ACL_LINK);
3638
3639 while (hdev->acl_cnt &&
3640 (chan = hci_chan_sent(hdev, ACL_LINK, "e))) {
3641 u32 priority = (skb_peek(&chan->data_q))->priority;
3642 while (quote-- && (skb = skb_peek(&chan->data_q))) {
3643 BT_DBG("chan %p skb %p len %d priority %u", chan, skb,
3644 skb->len, skb->priority);
3645
3646 /* Stop if priority has changed */
3647 if (skb->priority < priority)
3648 break;
3649
3650 skb = skb_dequeue(&chan->data_q);
3651
3652 hci_conn_enter_active_mode(chan->conn,
3653 bt_cb(skb)->force_active);
3654
3655 hci_send_frame(hdev, skb);
3656 hdev->acl_last_tx = jiffies;
3657
3658 hdev->acl_cnt--;
3659 chan->sent++;
3660 chan->conn->sent++;
3661
3662 /* Send pending SCO packets right away */
3663 hci_sched_sco(hdev);
3664 hci_sched_esco(hdev);
3665 }
3666 }
3667
3668 if (cnt != hdev->acl_cnt)
3669 hci_prio_recalculate(hdev, ACL_LINK);
3670}
3671
3672static void hci_sched_acl_blk(struct hci_dev *hdev)
3673{
3674 unsigned int cnt = hdev->block_cnt;
3675 struct hci_chan *chan;
3676 struct sk_buff *skb;
3677 int quote;
3678 u8 type;
3679
3680 BT_DBG("%s", hdev->name);
3681
3682 if (hdev->dev_type == HCI_AMP)
3683 type = AMP_LINK;
3684 else
3685 type = ACL_LINK;
3686
3687 __check_timeout(hdev, cnt, type);
3688
3689 while (hdev->block_cnt > 0 &&
3690 (chan = hci_chan_sent(hdev, type, "e))) {
3691 u32 priority = (skb_peek(&chan->data_q))->priority;
3692 while (quote > 0 && (skb = skb_peek(&chan->data_q))) {
3693 int blocks;
3694
3695 BT_DBG("chan %p skb %p len %d priority %u", chan, skb,
3696 skb->len, skb->priority);
3697
3698 /* Stop if priority has changed */
3699 if (skb->priority < priority)
3700 break;
3701
3702 skb = skb_dequeue(&chan->data_q);
3703
3704 blocks = __get_blocks(hdev, skb);
3705 if (blocks > hdev->block_cnt)
3706 return;
3707
3708 hci_conn_enter_active_mode(chan->conn,
3709 bt_cb(skb)->force_active);
3710
3711 hci_send_frame(hdev, skb);
3712 hdev->acl_last_tx = jiffies;
3713
3714 hdev->block_cnt -= blocks;
3715 quote -= blocks;
3716
3717 chan->sent += blocks;
3718 chan->conn->sent += blocks;
3719 }
3720 }
3721
3722 if (cnt != hdev->block_cnt)
3723 hci_prio_recalculate(hdev, type);
3724}
3725
3726static void hci_sched_acl(struct hci_dev *hdev)
3727{
3728 BT_DBG("%s", hdev->name);
3729
3730 /* No ACL link over BR/EDR controller */
3731 if (!hci_conn_num(hdev, ACL_LINK) && hdev->dev_type == HCI_PRIMARY)
3732 return;
3733
3734 /* No AMP link over AMP controller */
3735 if (!hci_conn_num(hdev, AMP_LINK) && hdev->dev_type == HCI_AMP)
3736 return;
3737
3738 switch (hdev->flow_ctl_mode) {
3739 case HCI_FLOW_CTL_MODE_PACKET_BASED:
3740 hci_sched_acl_pkt(hdev);
3741 break;
3742
3743 case HCI_FLOW_CTL_MODE_BLOCK_BASED:
3744 hci_sched_acl_blk(hdev);
3745 break;
3746 }
3747}
3748
3749static void hci_sched_le(struct hci_dev *hdev)
3750{
3751 struct hci_chan *chan;
3752 struct sk_buff *skb;
3753 int quote, cnt, tmp;
3754
3755 BT_DBG("%s", hdev->name);
3756
3757 if (!hci_conn_num(hdev, LE_LINK))
3758 return;
3759
3760 cnt = hdev->le_pkts ? hdev->le_cnt : hdev->acl_cnt;
3761
3762 __check_timeout(hdev, cnt, LE_LINK);
3763
3764 tmp = cnt;
3765 while (cnt && (chan = hci_chan_sent(hdev, LE_LINK, "e))) {
3766 u32 priority = (skb_peek(&chan->data_q))->priority;
3767 while (quote-- && (skb = skb_peek(&chan->data_q))) {
3768 BT_DBG("chan %p skb %p len %d priority %u", chan, skb,
3769 skb->len, skb->priority);
3770
3771 /* Stop if priority has changed */
3772 if (skb->priority < priority)
3773 break;
3774
3775 skb = skb_dequeue(&chan->data_q);
3776
3777 hci_send_frame(hdev, skb);
3778 hdev->le_last_tx = jiffies;
3779
3780 cnt--;
3781 chan->sent++;
3782 chan->conn->sent++;
3783
3784 /* Send pending SCO packets right away */
3785 hci_sched_sco(hdev);
3786 hci_sched_esco(hdev);
3787 }
3788 }
3789
3790 if (hdev->le_pkts)
3791 hdev->le_cnt = cnt;
3792 else
3793 hdev->acl_cnt = cnt;
3794
3795 if (cnt != tmp)
3796 hci_prio_recalculate(hdev, LE_LINK);
3797}
3798
3799/* Schedule CIS */
3800static void hci_sched_iso(struct hci_dev *hdev)
3801{
3802 struct hci_conn *conn;
3803 struct sk_buff *skb;
3804 int quote, *cnt;
3805
3806 BT_DBG("%s", hdev->name);
3807
3808 if (!hci_conn_num(hdev, ISO_LINK))
3809 return;
3810
3811 cnt = hdev->iso_pkts ? &hdev->iso_cnt :
3812 hdev->le_pkts ? &hdev->le_cnt : &hdev->acl_cnt;
3813 while (*cnt && (conn = hci_low_sent(hdev, ISO_LINK, "e))) {
3814 while (quote-- && (skb = skb_dequeue(&conn->data_q))) {
3815 BT_DBG("skb %p len %d", skb, skb->len);
3816 hci_send_frame(hdev, skb);
3817
3818 conn->sent++;
3819 if (conn->sent == ~0)
3820 conn->sent = 0;
3821 (*cnt)--;
3822 }
3823 }
3824}
3825
3826static void hci_tx_work(struct work_struct *work)
3827{
3828 struct hci_dev *hdev = container_of(work, struct hci_dev, tx_work);
3829 struct sk_buff *skb;
3830
3831 BT_DBG("%s acl %d sco %d le %d iso %d", hdev->name, hdev->acl_cnt,
3832 hdev->sco_cnt, hdev->le_cnt, hdev->iso_cnt);
3833
3834 if (!hci_dev_test_flag(hdev, HCI_USER_CHANNEL)) {
3835 /* Schedule queues and send stuff to HCI driver */
3836 hci_sched_sco(hdev);
3837 hci_sched_esco(hdev);
3838 hci_sched_iso(hdev);
3839 hci_sched_acl(hdev);
3840 hci_sched_le(hdev);
3841 }
3842
3843 /* Send next queued raw (unknown type) packet */
3844 while ((skb = skb_dequeue(&hdev->raw_q)))
3845 hci_send_frame(hdev, skb);
3846}
3847
3848/* ----- HCI RX task (incoming data processing) ----- */
3849
3850/* ACL data packet */
3851static void hci_acldata_packet(struct hci_dev *hdev, struct sk_buff *skb)
3852{
3853 struct hci_acl_hdr *hdr = (void *) skb->data;
3854 struct hci_conn *conn;
3855 __u16 handle, flags;
3856
3857 skb_pull(skb, HCI_ACL_HDR_SIZE);
3858
3859 handle = __le16_to_cpu(hdr->handle);
3860 flags = hci_flags(handle);
3861 handle = hci_handle(handle);
3862
3863 BT_DBG("%s len %d handle 0x%4.4x flags 0x%4.4x", hdev->name, skb->len,
3864 handle, flags);
3865
3866 hdev->stat.acl_rx++;
3867
3868 hci_dev_lock(hdev);
3869 conn = hci_conn_hash_lookup_handle(hdev, handle);
3870 hci_dev_unlock(hdev);
3871
3872 if (conn) {
3873 hci_conn_enter_active_mode(conn, BT_POWER_FORCE_ACTIVE_OFF);
3874
3875 /* Send to upper protocol */
3876 l2cap_recv_acldata(conn, skb, flags);
3877 return;
3878 } else {
3879 bt_dev_err(hdev, "ACL packet for unknown connection handle %d",
3880 handle);
3881 }
3882
3883 kfree_skb(skb);
3884}
3885
3886/* SCO data packet */
3887static void hci_scodata_packet(struct hci_dev *hdev, struct sk_buff *skb)
3888{
3889 struct hci_sco_hdr *hdr = (void *) skb->data;
3890 struct hci_conn *conn;
3891 __u16 handle, flags;
3892
3893 skb_pull(skb, HCI_SCO_HDR_SIZE);
3894
3895 handle = __le16_to_cpu(hdr->handle);
3896 flags = hci_flags(handle);
3897 handle = hci_handle(handle);
3898
3899 BT_DBG("%s len %d handle 0x%4.4x flags 0x%4.4x", hdev->name, skb->len,
3900 handle, flags);
3901
3902 hdev->stat.sco_rx++;
3903
3904 hci_dev_lock(hdev);
3905 conn = hci_conn_hash_lookup_handle(hdev, handle);
3906 hci_dev_unlock(hdev);
3907
3908 if (conn) {
3909 /* Send to upper protocol */
3910 hci_skb_pkt_status(skb) = flags & 0x03;
3911 sco_recv_scodata(conn, skb);
3912 return;
3913 } else {
3914 bt_dev_err_ratelimited(hdev, "SCO packet for unknown connection handle %d",
3915 handle);
3916 }
3917
3918 kfree_skb(skb);
3919}
3920
3921static void hci_isodata_packet(struct hci_dev *hdev, struct sk_buff *skb)
3922{
3923 struct hci_iso_hdr *hdr;
3924 struct hci_conn *conn;
3925 __u16 handle, flags;
3926
3927 hdr = skb_pull_data(skb, sizeof(*hdr));
3928 if (!hdr) {
3929 bt_dev_err(hdev, "ISO packet too small");
3930 goto drop;
3931 }
3932
3933 handle = __le16_to_cpu(hdr->handle);
3934 flags = hci_flags(handle);
3935 handle = hci_handle(handle);
3936
3937 bt_dev_dbg(hdev, "len %d handle 0x%4.4x flags 0x%4.4x", skb->len,
3938 handle, flags);
3939
3940 hci_dev_lock(hdev);
3941 conn = hci_conn_hash_lookup_handle(hdev, handle);
3942 hci_dev_unlock(hdev);
3943
3944 if (!conn) {
3945 bt_dev_err(hdev, "ISO packet for unknown connection handle %d",
3946 handle);
3947 goto drop;
3948 }
3949
3950 /* Send to upper protocol */
3951 iso_recv(conn, skb, flags);
3952 return;
3953
3954drop:
3955 kfree_skb(skb);
3956}
3957
3958static bool hci_req_is_complete(struct hci_dev *hdev)
3959{
3960 struct sk_buff *skb;
3961
3962 skb = skb_peek(&hdev->cmd_q);
3963 if (!skb)
3964 return true;
3965
3966 return (bt_cb(skb)->hci.req_flags & HCI_REQ_START);
3967}
3968
3969static void hci_resend_last(struct hci_dev *hdev)
3970{
3971 struct hci_command_hdr *sent;
3972 struct sk_buff *skb;
3973 u16 opcode;
3974
3975 if (!hdev->sent_cmd)
3976 return;
3977
3978 sent = (void *) hdev->sent_cmd->data;
3979 opcode = __le16_to_cpu(sent->opcode);
3980 if (opcode == HCI_OP_RESET)
3981 return;
3982
3983 skb = skb_clone(hdev->sent_cmd, GFP_KERNEL);
3984 if (!skb)
3985 return;
3986
3987 skb_queue_head(&hdev->cmd_q, skb);
3988 queue_work(hdev->workqueue, &hdev->cmd_work);
3989}
3990
3991void hci_req_cmd_complete(struct hci_dev *hdev, u16 opcode, u8 status,
3992 hci_req_complete_t *req_complete,
3993 hci_req_complete_skb_t *req_complete_skb)
3994{
3995 struct sk_buff *skb;
3996 unsigned long flags;
3997
3998 BT_DBG("opcode 0x%04x status 0x%02x", opcode, status);
3999
4000 /* If the completed command doesn't match the last one that was
4001 * sent we need to do special handling of it.
4002 */
4003 if (!hci_sent_cmd_data(hdev, opcode)) {
4004 /* Some CSR based controllers generate a spontaneous
4005 * reset complete event during init and any pending
4006 * command will never be completed. In such a case we
4007 * need to resend whatever was the last sent
4008 * command.
4009 */
4010 if (test_bit(HCI_INIT, &hdev->flags) && opcode == HCI_OP_RESET)
4011 hci_resend_last(hdev);
4012
4013 return;
4014 }
4015
4016 /* If we reach this point this event matches the last command sent */
4017 hci_dev_clear_flag(hdev, HCI_CMD_PENDING);
4018
4019 /* If the command succeeded and there's still more commands in
4020 * this request the request is not yet complete.
4021 */
4022 if (!status && !hci_req_is_complete(hdev))
4023 return;
4024
4025 /* If this was the last command in a request the complete
4026 * callback would be found in hdev->sent_cmd instead of the
4027 * command queue (hdev->cmd_q).
4028 */
4029 if (bt_cb(hdev->sent_cmd)->hci.req_flags & HCI_REQ_SKB) {
4030 *req_complete_skb = bt_cb(hdev->sent_cmd)->hci.req_complete_skb;
4031 return;
4032 }
4033
4034 if (bt_cb(hdev->sent_cmd)->hci.req_complete) {
4035 *req_complete = bt_cb(hdev->sent_cmd)->hci.req_complete;
4036 return;
4037 }
4038
4039 /* Remove all pending commands belonging to this request */
4040 spin_lock_irqsave(&hdev->cmd_q.lock, flags);
4041 while ((skb = __skb_dequeue(&hdev->cmd_q))) {
4042 if (bt_cb(skb)->hci.req_flags & HCI_REQ_START) {
4043 __skb_queue_head(&hdev->cmd_q, skb);
4044 break;
4045 }
4046
4047 if (bt_cb(skb)->hci.req_flags & HCI_REQ_SKB)
4048 *req_complete_skb = bt_cb(skb)->hci.req_complete_skb;
4049 else
4050 *req_complete = bt_cb(skb)->hci.req_complete;
4051 dev_kfree_skb_irq(skb);
4052 }
4053 spin_unlock_irqrestore(&hdev->cmd_q.lock, flags);
4054}
4055
4056static void hci_rx_work(struct work_struct *work)
4057{
4058 struct hci_dev *hdev = container_of(work, struct hci_dev, rx_work);
4059 struct sk_buff *skb;
4060
4061 BT_DBG("%s", hdev->name);
4062
4063 /* The kcov_remote functions used for collecting packet parsing
4064 * coverage information from this background thread and associate
4065 * the coverage with the syscall's thread which originally injected
4066 * the packet. This helps fuzzing the kernel.
4067 */
4068 for (; (skb = skb_dequeue(&hdev->rx_q)); kcov_remote_stop()) {
4069 kcov_remote_start_common(skb_get_kcov_handle(skb));
4070
4071 /* Send copy to monitor */
4072 hci_send_to_monitor(hdev, skb);
4073
4074 if (atomic_read(&hdev->promisc)) {
4075 /* Send copy to the sockets */
4076 hci_send_to_sock(hdev, skb);
4077 }
4078
4079 /* If the device has been opened in HCI_USER_CHANNEL,
4080 * the userspace has exclusive access to device.
4081 * When device is HCI_INIT, we still need to process
4082 * the data packets to the driver in order
4083 * to complete its setup().
4084 */
4085 if (hci_dev_test_flag(hdev, HCI_USER_CHANNEL) &&
4086 !test_bit(HCI_INIT, &hdev->flags)) {
4087 kfree_skb(skb);
4088 continue;
4089 }
4090
4091 if (test_bit(HCI_INIT, &hdev->flags)) {
4092 /* Don't process data packets in this states. */
4093 switch (hci_skb_pkt_type(skb)) {
4094 case HCI_ACLDATA_PKT:
4095 case HCI_SCODATA_PKT:
4096 case HCI_ISODATA_PKT:
4097 kfree_skb(skb);
4098 continue;
4099 }
4100 }
4101
4102 /* Process frame */
4103 switch (hci_skb_pkt_type(skb)) {
4104 case HCI_EVENT_PKT:
4105 BT_DBG("%s Event packet", hdev->name);
4106 hci_event_packet(hdev, skb);
4107 break;
4108
4109 case HCI_ACLDATA_PKT:
4110 BT_DBG("%s ACL data packet", hdev->name);
4111 hci_acldata_packet(hdev, skb);
4112 break;
4113
4114 case HCI_SCODATA_PKT:
4115 BT_DBG("%s SCO data packet", hdev->name);
4116 hci_scodata_packet(hdev, skb);
4117 break;
4118
4119 case HCI_ISODATA_PKT:
4120 BT_DBG("%s ISO data packet", hdev->name);
4121 hci_isodata_packet(hdev, skb);
4122 break;
4123
4124 default:
4125 kfree_skb(skb);
4126 break;
4127 }
4128 }
4129}
4130
4131static void hci_cmd_work(struct work_struct *work)
4132{
4133 struct hci_dev *hdev = container_of(work, struct hci_dev, cmd_work);
4134 struct sk_buff *skb;
4135
4136 BT_DBG("%s cmd_cnt %d cmd queued %d", hdev->name,
4137 atomic_read(&hdev->cmd_cnt), skb_queue_len(&hdev->cmd_q));
4138
4139 /* Send queued commands */
4140 if (atomic_read(&hdev->cmd_cnt)) {
4141 skb = skb_dequeue(&hdev->cmd_q);
4142 if (!skb)
4143 return;
4144
4145 kfree_skb(hdev->sent_cmd);
4146
4147 hdev->sent_cmd = skb_clone(skb, GFP_KERNEL);
4148 if (hdev->sent_cmd) {
4149 int res;
4150 if (hci_req_status_pend(hdev))
4151 hci_dev_set_flag(hdev, HCI_CMD_PENDING);
4152 atomic_dec(&hdev->cmd_cnt);
4153
4154 res = hci_send_frame(hdev, skb);
4155 if (res < 0)
4156 __hci_cmd_sync_cancel(hdev, -res);
4157
4158 rcu_read_lock();
4159 if (test_bit(HCI_RESET, &hdev->flags) ||
4160 hci_dev_test_flag(hdev, HCI_CMD_DRAIN_WORKQUEUE))
4161 cancel_delayed_work(&hdev->cmd_timer);
4162 else
4163 queue_delayed_work(hdev->workqueue, &hdev->cmd_timer,
4164 HCI_CMD_TIMEOUT);
4165 rcu_read_unlock();
4166 } else {
4167 skb_queue_head(&hdev->cmd_q, skb);
4168 queue_work(hdev->workqueue, &hdev->cmd_work);
4169 }
4170 }
4171}
1/*
2 BlueZ - Bluetooth protocol stack for Linux
3 Copyright (C) 2000-2001 Qualcomm Incorporated
4 Copyright (C) 2011 ProFUSION Embedded Systems
5
6 Written 2000,2001 by Maxim Krasnyansky <maxk@qualcomm.com>
7
8 This program is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License version 2 as
10 published by the Free Software Foundation;
11
12 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
13 OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
14 FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT OF THIRD PARTY RIGHTS.
15 IN NO EVENT SHALL THE COPYRIGHT HOLDER(S) AND AUTHOR(S) BE LIABLE FOR ANY
16 CLAIM, OR ANY SPECIAL INDIRECT OR CONSEQUENTIAL DAMAGES, OR ANY DAMAGES
17 WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
18 ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
19 OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
20
21 ALL LIABILITY, INCLUDING LIABILITY FOR INFRINGEMENT OF ANY PATENTS,
22 COPYRIGHTS, TRADEMARKS OR OTHER RIGHTS, RELATING TO USE OF THIS
23 SOFTWARE IS DISCLAIMED.
24*/
25
26/* Bluetooth HCI core. */
27
28#include <linux/export.h>
29#include <linux/rfkill.h>
30#include <linux/debugfs.h>
31#include <linux/crypto.h>
32#include <linux/kcov.h>
33#include <linux/property.h>
34#include <linux/suspend.h>
35#include <linux/wait.h>
36#include <asm/unaligned.h>
37
38#include <net/bluetooth/bluetooth.h>
39#include <net/bluetooth/hci_core.h>
40#include <net/bluetooth/l2cap.h>
41#include <net/bluetooth/mgmt.h>
42
43#include "hci_request.h"
44#include "hci_debugfs.h"
45#include "smp.h"
46#include "leds.h"
47#include "msft.h"
48#include "aosp.h"
49#include "hci_codec.h"
50
51static void hci_rx_work(struct work_struct *work);
52static void hci_cmd_work(struct work_struct *work);
53static void hci_tx_work(struct work_struct *work);
54
55/* HCI device list */
56LIST_HEAD(hci_dev_list);
57DEFINE_RWLOCK(hci_dev_list_lock);
58
59/* HCI callback list */
60LIST_HEAD(hci_cb_list);
61DEFINE_MUTEX(hci_cb_list_lock);
62
63/* HCI ID Numbering */
64static DEFINE_IDA(hci_index_ida);
65
66static int hci_scan_req(struct hci_request *req, unsigned long opt)
67{
68 __u8 scan = opt;
69
70 BT_DBG("%s %x", req->hdev->name, scan);
71
72 /* Inquiry and Page scans */
73 hci_req_add(req, HCI_OP_WRITE_SCAN_ENABLE, 1, &scan);
74 return 0;
75}
76
77static int hci_auth_req(struct hci_request *req, unsigned long opt)
78{
79 __u8 auth = opt;
80
81 BT_DBG("%s %x", req->hdev->name, auth);
82
83 /* Authentication */
84 hci_req_add(req, HCI_OP_WRITE_AUTH_ENABLE, 1, &auth);
85 return 0;
86}
87
88static int hci_encrypt_req(struct hci_request *req, unsigned long opt)
89{
90 __u8 encrypt = opt;
91
92 BT_DBG("%s %x", req->hdev->name, encrypt);
93
94 /* Encryption */
95 hci_req_add(req, HCI_OP_WRITE_ENCRYPT_MODE, 1, &encrypt);
96 return 0;
97}
98
99static int hci_linkpol_req(struct hci_request *req, unsigned long opt)
100{
101 __le16 policy = cpu_to_le16(opt);
102
103 BT_DBG("%s %x", req->hdev->name, policy);
104
105 /* Default link policy */
106 hci_req_add(req, HCI_OP_WRITE_DEF_LINK_POLICY, 2, &policy);
107 return 0;
108}
109
110/* Get HCI device by index.
111 * Device is held on return. */
112struct hci_dev *hci_dev_get(int index)
113{
114 struct hci_dev *hdev = NULL, *d;
115
116 BT_DBG("%d", index);
117
118 if (index < 0)
119 return NULL;
120
121 read_lock(&hci_dev_list_lock);
122 list_for_each_entry(d, &hci_dev_list, list) {
123 if (d->id == index) {
124 hdev = hci_dev_hold(d);
125 break;
126 }
127 }
128 read_unlock(&hci_dev_list_lock);
129 return hdev;
130}
131
132/* ---- Inquiry support ---- */
133
134bool hci_discovery_active(struct hci_dev *hdev)
135{
136 struct discovery_state *discov = &hdev->discovery;
137
138 switch (discov->state) {
139 case DISCOVERY_FINDING:
140 case DISCOVERY_RESOLVING:
141 return true;
142
143 default:
144 return false;
145 }
146}
147
148void hci_discovery_set_state(struct hci_dev *hdev, int state)
149{
150 int old_state = hdev->discovery.state;
151
152 BT_DBG("%s state %u -> %u", hdev->name, hdev->discovery.state, state);
153
154 if (old_state == state)
155 return;
156
157 hdev->discovery.state = state;
158
159 switch (state) {
160 case DISCOVERY_STOPPED:
161 hci_update_passive_scan(hdev);
162
163 if (old_state != DISCOVERY_STARTING)
164 mgmt_discovering(hdev, 0);
165 break;
166 case DISCOVERY_STARTING:
167 break;
168 case DISCOVERY_FINDING:
169 mgmt_discovering(hdev, 1);
170 break;
171 case DISCOVERY_RESOLVING:
172 break;
173 case DISCOVERY_STOPPING:
174 break;
175 }
176}
177
178void hci_inquiry_cache_flush(struct hci_dev *hdev)
179{
180 struct discovery_state *cache = &hdev->discovery;
181 struct inquiry_entry *p, *n;
182
183 list_for_each_entry_safe(p, n, &cache->all, all) {
184 list_del(&p->all);
185 kfree(p);
186 }
187
188 INIT_LIST_HEAD(&cache->unknown);
189 INIT_LIST_HEAD(&cache->resolve);
190}
191
192struct inquiry_entry *hci_inquiry_cache_lookup(struct hci_dev *hdev,
193 bdaddr_t *bdaddr)
194{
195 struct discovery_state *cache = &hdev->discovery;
196 struct inquiry_entry *e;
197
198 BT_DBG("cache %p, %pMR", cache, bdaddr);
199
200 list_for_each_entry(e, &cache->all, all) {
201 if (!bacmp(&e->data.bdaddr, bdaddr))
202 return e;
203 }
204
205 return NULL;
206}
207
208struct inquiry_entry *hci_inquiry_cache_lookup_unknown(struct hci_dev *hdev,
209 bdaddr_t *bdaddr)
210{
211 struct discovery_state *cache = &hdev->discovery;
212 struct inquiry_entry *e;
213
214 BT_DBG("cache %p, %pMR", cache, bdaddr);
215
216 list_for_each_entry(e, &cache->unknown, list) {
217 if (!bacmp(&e->data.bdaddr, bdaddr))
218 return e;
219 }
220
221 return NULL;
222}
223
224struct inquiry_entry *hci_inquiry_cache_lookup_resolve(struct hci_dev *hdev,
225 bdaddr_t *bdaddr,
226 int state)
227{
228 struct discovery_state *cache = &hdev->discovery;
229 struct inquiry_entry *e;
230
231 BT_DBG("cache %p bdaddr %pMR state %d", cache, bdaddr, state);
232
233 list_for_each_entry(e, &cache->resolve, list) {
234 if (!bacmp(bdaddr, BDADDR_ANY) && e->name_state == state)
235 return e;
236 if (!bacmp(&e->data.bdaddr, bdaddr))
237 return e;
238 }
239
240 return NULL;
241}
242
243void hci_inquiry_cache_update_resolve(struct hci_dev *hdev,
244 struct inquiry_entry *ie)
245{
246 struct discovery_state *cache = &hdev->discovery;
247 struct list_head *pos = &cache->resolve;
248 struct inquiry_entry *p;
249
250 list_del(&ie->list);
251
252 list_for_each_entry(p, &cache->resolve, list) {
253 if (p->name_state != NAME_PENDING &&
254 abs(p->data.rssi) >= abs(ie->data.rssi))
255 break;
256 pos = &p->list;
257 }
258
259 list_add(&ie->list, pos);
260}
261
262u32 hci_inquiry_cache_update(struct hci_dev *hdev, struct inquiry_data *data,
263 bool name_known)
264{
265 struct discovery_state *cache = &hdev->discovery;
266 struct inquiry_entry *ie;
267 u32 flags = 0;
268
269 BT_DBG("cache %p, %pMR", cache, &data->bdaddr);
270
271 hci_remove_remote_oob_data(hdev, &data->bdaddr, BDADDR_BREDR);
272
273 if (!data->ssp_mode)
274 flags |= MGMT_DEV_FOUND_LEGACY_PAIRING;
275
276 ie = hci_inquiry_cache_lookup(hdev, &data->bdaddr);
277 if (ie) {
278 if (!ie->data.ssp_mode)
279 flags |= MGMT_DEV_FOUND_LEGACY_PAIRING;
280
281 if (ie->name_state == NAME_NEEDED &&
282 data->rssi != ie->data.rssi) {
283 ie->data.rssi = data->rssi;
284 hci_inquiry_cache_update_resolve(hdev, ie);
285 }
286
287 goto update;
288 }
289
290 /* Entry not in the cache. Add new one. */
291 ie = kzalloc(sizeof(*ie), GFP_KERNEL);
292 if (!ie) {
293 flags |= MGMT_DEV_FOUND_CONFIRM_NAME;
294 goto done;
295 }
296
297 list_add(&ie->all, &cache->all);
298
299 if (name_known) {
300 ie->name_state = NAME_KNOWN;
301 } else {
302 ie->name_state = NAME_NOT_KNOWN;
303 list_add(&ie->list, &cache->unknown);
304 }
305
306update:
307 if (name_known && ie->name_state != NAME_KNOWN &&
308 ie->name_state != NAME_PENDING) {
309 ie->name_state = NAME_KNOWN;
310 list_del(&ie->list);
311 }
312
313 memcpy(&ie->data, data, sizeof(*data));
314 ie->timestamp = jiffies;
315 cache->timestamp = jiffies;
316
317 if (ie->name_state == NAME_NOT_KNOWN)
318 flags |= MGMT_DEV_FOUND_CONFIRM_NAME;
319
320done:
321 return flags;
322}
323
324static int inquiry_cache_dump(struct hci_dev *hdev, int num, __u8 *buf)
325{
326 struct discovery_state *cache = &hdev->discovery;
327 struct inquiry_info *info = (struct inquiry_info *) buf;
328 struct inquiry_entry *e;
329 int copied = 0;
330
331 list_for_each_entry(e, &cache->all, all) {
332 struct inquiry_data *data = &e->data;
333
334 if (copied >= num)
335 break;
336
337 bacpy(&info->bdaddr, &data->bdaddr);
338 info->pscan_rep_mode = data->pscan_rep_mode;
339 info->pscan_period_mode = data->pscan_period_mode;
340 info->pscan_mode = data->pscan_mode;
341 memcpy(info->dev_class, data->dev_class, 3);
342 info->clock_offset = data->clock_offset;
343
344 info++;
345 copied++;
346 }
347
348 BT_DBG("cache %p, copied %d", cache, copied);
349 return copied;
350}
351
352static int hci_inq_req(struct hci_request *req, unsigned long opt)
353{
354 struct hci_inquiry_req *ir = (struct hci_inquiry_req *) opt;
355 struct hci_dev *hdev = req->hdev;
356 struct hci_cp_inquiry cp;
357
358 BT_DBG("%s", hdev->name);
359
360 if (test_bit(HCI_INQUIRY, &hdev->flags))
361 return 0;
362
363 /* Start Inquiry */
364 memcpy(&cp.lap, &ir->lap, 3);
365 cp.length = ir->length;
366 cp.num_rsp = ir->num_rsp;
367 hci_req_add(req, HCI_OP_INQUIRY, sizeof(cp), &cp);
368
369 return 0;
370}
371
372int hci_inquiry(void __user *arg)
373{
374 __u8 __user *ptr = arg;
375 struct hci_inquiry_req ir;
376 struct hci_dev *hdev;
377 int err = 0, do_inquiry = 0, max_rsp;
378 long timeo;
379 __u8 *buf;
380
381 if (copy_from_user(&ir, ptr, sizeof(ir)))
382 return -EFAULT;
383
384 hdev = hci_dev_get(ir.dev_id);
385 if (!hdev)
386 return -ENODEV;
387
388 if (hci_dev_test_flag(hdev, HCI_USER_CHANNEL)) {
389 err = -EBUSY;
390 goto done;
391 }
392
393 if (hci_dev_test_flag(hdev, HCI_UNCONFIGURED)) {
394 err = -EOPNOTSUPP;
395 goto done;
396 }
397
398 if (!hci_dev_test_flag(hdev, HCI_BREDR_ENABLED)) {
399 err = -EOPNOTSUPP;
400 goto done;
401 }
402
403 /* Restrict maximum inquiry length to 60 seconds */
404 if (ir.length > 60) {
405 err = -EINVAL;
406 goto done;
407 }
408
409 hci_dev_lock(hdev);
410 if (inquiry_cache_age(hdev) > INQUIRY_CACHE_AGE_MAX ||
411 inquiry_cache_empty(hdev) || ir.flags & IREQ_CACHE_FLUSH) {
412 hci_inquiry_cache_flush(hdev);
413 do_inquiry = 1;
414 }
415 hci_dev_unlock(hdev);
416
417 timeo = ir.length * msecs_to_jiffies(2000);
418
419 if (do_inquiry) {
420 err = hci_req_sync(hdev, hci_inq_req, (unsigned long) &ir,
421 timeo, NULL);
422 if (err < 0)
423 goto done;
424
425 /* Wait until Inquiry procedure finishes (HCI_INQUIRY flag is
426 * cleared). If it is interrupted by a signal, return -EINTR.
427 */
428 if (wait_on_bit(&hdev->flags, HCI_INQUIRY,
429 TASK_INTERRUPTIBLE)) {
430 err = -EINTR;
431 goto done;
432 }
433 }
434
435 /* for unlimited number of responses we will use buffer with
436 * 255 entries
437 */
438 max_rsp = (ir.num_rsp == 0) ? 255 : ir.num_rsp;
439
440 /* cache_dump can't sleep. Therefore we allocate temp buffer and then
441 * copy it to the user space.
442 */
443 buf = kmalloc_array(max_rsp, sizeof(struct inquiry_info), GFP_KERNEL);
444 if (!buf) {
445 err = -ENOMEM;
446 goto done;
447 }
448
449 hci_dev_lock(hdev);
450 ir.num_rsp = inquiry_cache_dump(hdev, max_rsp, buf);
451 hci_dev_unlock(hdev);
452
453 BT_DBG("num_rsp %d", ir.num_rsp);
454
455 if (!copy_to_user(ptr, &ir, sizeof(ir))) {
456 ptr += sizeof(ir);
457 if (copy_to_user(ptr, buf, sizeof(struct inquiry_info) *
458 ir.num_rsp))
459 err = -EFAULT;
460 } else
461 err = -EFAULT;
462
463 kfree(buf);
464
465done:
466 hci_dev_put(hdev);
467 return err;
468}
469
470static int hci_dev_do_open(struct hci_dev *hdev)
471{
472 int ret = 0;
473
474 BT_DBG("%s %p", hdev->name, hdev);
475
476 hci_req_sync_lock(hdev);
477
478 ret = hci_dev_open_sync(hdev);
479
480 hci_req_sync_unlock(hdev);
481 return ret;
482}
483
484/* ---- HCI ioctl helpers ---- */
485
486int hci_dev_open(__u16 dev)
487{
488 struct hci_dev *hdev;
489 int err;
490
491 hdev = hci_dev_get(dev);
492 if (!hdev)
493 return -ENODEV;
494
495 /* Devices that are marked as unconfigured can only be powered
496 * up as user channel. Trying to bring them up as normal devices
497 * will result into a failure. Only user channel operation is
498 * possible.
499 *
500 * When this function is called for a user channel, the flag
501 * HCI_USER_CHANNEL will be set first before attempting to
502 * open the device.
503 */
504 if (hci_dev_test_flag(hdev, HCI_UNCONFIGURED) &&
505 !hci_dev_test_flag(hdev, HCI_USER_CHANNEL)) {
506 err = -EOPNOTSUPP;
507 goto done;
508 }
509
510 /* We need to ensure that no other power on/off work is pending
511 * before proceeding to call hci_dev_do_open. This is
512 * particularly important if the setup procedure has not yet
513 * completed.
514 */
515 if (hci_dev_test_and_clear_flag(hdev, HCI_AUTO_OFF))
516 cancel_delayed_work(&hdev->power_off);
517
518 /* After this call it is guaranteed that the setup procedure
519 * has finished. This means that error conditions like RFKILL
520 * or no valid public or static random address apply.
521 */
522 flush_workqueue(hdev->req_workqueue);
523
524 /* For controllers not using the management interface and that
525 * are brought up using legacy ioctl, set the HCI_BONDABLE bit
526 * so that pairing works for them. Once the management interface
527 * is in use this bit will be cleared again and userspace has
528 * to explicitly enable it.
529 */
530 if (!hci_dev_test_flag(hdev, HCI_USER_CHANNEL) &&
531 !hci_dev_test_flag(hdev, HCI_MGMT))
532 hci_dev_set_flag(hdev, HCI_BONDABLE);
533
534 err = hci_dev_do_open(hdev);
535
536done:
537 hci_dev_put(hdev);
538 return err;
539}
540
541int hci_dev_do_close(struct hci_dev *hdev)
542{
543 int err;
544
545 BT_DBG("%s %p", hdev->name, hdev);
546
547 hci_req_sync_lock(hdev);
548
549 err = hci_dev_close_sync(hdev);
550
551 hci_req_sync_unlock(hdev);
552
553 return err;
554}
555
556int hci_dev_close(__u16 dev)
557{
558 struct hci_dev *hdev;
559 int err;
560
561 hdev = hci_dev_get(dev);
562 if (!hdev)
563 return -ENODEV;
564
565 if (hci_dev_test_flag(hdev, HCI_USER_CHANNEL)) {
566 err = -EBUSY;
567 goto done;
568 }
569
570 cancel_work_sync(&hdev->power_on);
571 if (hci_dev_test_and_clear_flag(hdev, HCI_AUTO_OFF))
572 cancel_delayed_work(&hdev->power_off);
573
574 err = hci_dev_do_close(hdev);
575
576done:
577 hci_dev_put(hdev);
578 return err;
579}
580
581static int hci_dev_do_reset(struct hci_dev *hdev)
582{
583 int ret;
584
585 BT_DBG("%s %p", hdev->name, hdev);
586
587 hci_req_sync_lock(hdev);
588
589 /* Drop queues */
590 skb_queue_purge(&hdev->rx_q);
591 skb_queue_purge(&hdev->cmd_q);
592
593 /* Cancel these to avoid queueing non-chained pending work */
594 hci_dev_set_flag(hdev, HCI_CMD_DRAIN_WORKQUEUE);
595 /* Wait for
596 *
597 * if (!hci_dev_test_flag(hdev, HCI_CMD_DRAIN_WORKQUEUE))
598 * queue_delayed_work(&hdev->{cmd,ncmd}_timer)
599 *
600 * inside RCU section to see the flag or complete scheduling.
601 */
602 synchronize_rcu();
603 /* Explicitly cancel works in case scheduled after setting the flag. */
604 cancel_delayed_work(&hdev->cmd_timer);
605 cancel_delayed_work(&hdev->ncmd_timer);
606
607 /* Avoid potential lockdep warnings from the *_flush() calls by
608 * ensuring the workqueue is empty up front.
609 */
610 drain_workqueue(hdev->workqueue);
611
612 hci_dev_lock(hdev);
613 hci_inquiry_cache_flush(hdev);
614 hci_conn_hash_flush(hdev);
615 hci_dev_unlock(hdev);
616
617 if (hdev->flush)
618 hdev->flush(hdev);
619
620 hci_dev_clear_flag(hdev, HCI_CMD_DRAIN_WORKQUEUE);
621
622 atomic_set(&hdev->cmd_cnt, 1);
623 hdev->acl_cnt = 0;
624 hdev->sco_cnt = 0;
625 hdev->le_cnt = 0;
626 hdev->iso_cnt = 0;
627
628 ret = hci_reset_sync(hdev);
629
630 hci_req_sync_unlock(hdev);
631 return ret;
632}
633
634int hci_dev_reset(__u16 dev)
635{
636 struct hci_dev *hdev;
637 int err;
638
639 hdev = hci_dev_get(dev);
640 if (!hdev)
641 return -ENODEV;
642
643 if (!test_bit(HCI_UP, &hdev->flags)) {
644 err = -ENETDOWN;
645 goto done;
646 }
647
648 if (hci_dev_test_flag(hdev, HCI_USER_CHANNEL)) {
649 err = -EBUSY;
650 goto done;
651 }
652
653 if (hci_dev_test_flag(hdev, HCI_UNCONFIGURED)) {
654 err = -EOPNOTSUPP;
655 goto done;
656 }
657
658 err = hci_dev_do_reset(hdev);
659
660done:
661 hci_dev_put(hdev);
662 return err;
663}
664
665int hci_dev_reset_stat(__u16 dev)
666{
667 struct hci_dev *hdev;
668 int ret = 0;
669
670 hdev = hci_dev_get(dev);
671 if (!hdev)
672 return -ENODEV;
673
674 if (hci_dev_test_flag(hdev, HCI_USER_CHANNEL)) {
675 ret = -EBUSY;
676 goto done;
677 }
678
679 if (hci_dev_test_flag(hdev, HCI_UNCONFIGURED)) {
680 ret = -EOPNOTSUPP;
681 goto done;
682 }
683
684 memset(&hdev->stat, 0, sizeof(struct hci_dev_stats));
685
686done:
687 hci_dev_put(hdev);
688 return ret;
689}
690
691static void hci_update_passive_scan_state(struct hci_dev *hdev, u8 scan)
692{
693 bool conn_changed, discov_changed;
694
695 BT_DBG("%s scan 0x%02x", hdev->name, scan);
696
697 if ((scan & SCAN_PAGE))
698 conn_changed = !hci_dev_test_and_set_flag(hdev,
699 HCI_CONNECTABLE);
700 else
701 conn_changed = hci_dev_test_and_clear_flag(hdev,
702 HCI_CONNECTABLE);
703
704 if ((scan & SCAN_INQUIRY)) {
705 discov_changed = !hci_dev_test_and_set_flag(hdev,
706 HCI_DISCOVERABLE);
707 } else {
708 hci_dev_clear_flag(hdev, HCI_LIMITED_DISCOVERABLE);
709 discov_changed = hci_dev_test_and_clear_flag(hdev,
710 HCI_DISCOVERABLE);
711 }
712
713 if (!hci_dev_test_flag(hdev, HCI_MGMT))
714 return;
715
716 if (conn_changed || discov_changed) {
717 /* In case this was disabled through mgmt */
718 hci_dev_set_flag(hdev, HCI_BREDR_ENABLED);
719
720 if (hci_dev_test_flag(hdev, HCI_LE_ENABLED))
721 hci_update_adv_data(hdev, hdev->cur_adv_instance);
722
723 mgmt_new_settings(hdev);
724 }
725}
726
727int hci_dev_cmd(unsigned int cmd, void __user *arg)
728{
729 struct hci_dev *hdev;
730 struct hci_dev_req dr;
731 int err = 0;
732
733 if (copy_from_user(&dr, arg, sizeof(dr)))
734 return -EFAULT;
735
736 hdev = hci_dev_get(dr.dev_id);
737 if (!hdev)
738 return -ENODEV;
739
740 if (hci_dev_test_flag(hdev, HCI_USER_CHANNEL)) {
741 err = -EBUSY;
742 goto done;
743 }
744
745 if (hci_dev_test_flag(hdev, HCI_UNCONFIGURED)) {
746 err = -EOPNOTSUPP;
747 goto done;
748 }
749
750 if (!hci_dev_test_flag(hdev, HCI_BREDR_ENABLED)) {
751 err = -EOPNOTSUPP;
752 goto done;
753 }
754
755 switch (cmd) {
756 case HCISETAUTH:
757 err = hci_req_sync(hdev, hci_auth_req, dr.dev_opt,
758 HCI_INIT_TIMEOUT, NULL);
759 break;
760
761 case HCISETENCRYPT:
762 if (!lmp_encrypt_capable(hdev)) {
763 err = -EOPNOTSUPP;
764 break;
765 }
766
767 if (!test_bit(HCI_AUTH, &hdev->flags)) {
768 /* Auth must be enabled first */
769 err = hci_req_sync(hdev, hci_auth_req, dr.dev_opt,
770 HCI_INIT_TIMEOUT, NULL);
771 if (err)
772 break;
773 }
774
775 err = hci_req_sync(hdev, hci_encrypt_req, dr.dev_opt,
776 HCI_INIT_TIMEOUT, NULL);
777 break;
778
779 case HCISETSCAN:
780 err = hci_req_sync(hdev, hci_scan_req, dr.dev_opt,
781 HCI_INIT_TIMEOUT, NULL);
782
783 /* Ensure that the connectable and discoverable states
784 * get correctly modified as this was a non-mgmt change.
785 */
786 if (!err)
787 hci_update_passive_scan_state(hdev, dr.dev_opt);
788 break;
789
790 case HCISETLINKPOL:
791 err = hci_req_sync(hdev, hci_linkpol_req, dr.dev_opt,
792 HCI_INIT_TIMEOUT, NULL);
793 break;
794
795 case HCISETLINKMODE:
796 hdev->link_mode = ((__u16) dr.dev_opt) &
797 (HCI_LM_MASTER | HCI_LM_ACCEPT);
798 break;
799
800 case HCISETPTYPE:
801 if (hdev->pkt_type == (__u16) dr.dev_opt)
802 break;
803
804 hdev->pkt_type = (__u16) dr.dev_opt;
805 mgmt_phy_configuration_changed(hdev, NULL);
806 break;
807
808 case HCISETACLMTU:
809 hdev->acl_mtu = *((__u16 *) &dr.dev_opt + 1);
810 hdev->acl_pkts = *((__u16 *) &dr.dev_opt + 0);
811 break;
812
813 case HCISETSCOMTU:
814 hdev->sco_mtu = *((__u16 *) &dr.dev_opt + 1);
815 hdev->sco_pkts = *((__u16 *) &dr.dev_opt + 0);
816 break;
817
818 default:
819 err = -EINVAL;
820 break;
821 }
822
823done:
824 hci_dev_put(hdev);
825 return err;
826}
827
828int hci_get_dev_list(void __user *arg)
829{
830 struct hci_dev *hdev;
831 struct hci_dev_list_req *dl;
832 struct hci_dev_req *dr;
833 int n = 0, size, err;
834 __u16 dev_num;
835
836 if (get_user(dev_num, (__u16 __user *) arg))
837 return -EFAULT;
838
839 if (!dev_num || dev_num > (PAGE_SIZE * 2) / sizeof(*dr))
840 return -EINVAL;
841
842 size = sizeof(*dl) + dev_num * sizeof(*dr);
843
844 dl = kzalloc(size, GFP_KERNEL);
845 if (!dl)
846 return -ENOMEM;
847
848 dr = dl->dev_req;
849
850 read_lock(&hci_dev_list_lock);
851 list_for_each_entry(hdev, &hci_dev_list, list) {
852 unsigned long flags = hdev->flags;
853
854 /* When the auto-off is configured it means the transport
855 * is running, but in that case still indicate that the
856 * device is actually down.
857 */
858 if (hci_dev_test_flag(hdev, HCI_AUTO_OFF))
859 flags &= ~BIT(HCI_UP);
860
861 (dr + n)->dev_id = hdev->id;
862 (dr + n)->dev_opt = flags;
863
864 if (++n >= dev_num)
865 break;
866 }
867 read_unlock(&hci_dev_list_lock);
868
869 dl->dev_num = n;
870 size = sizeof(*dl) + n * sizeof(*dr);
871
872 err = copy_to_user(arg, dl, size);
873 kfree(dl);
874
875 return err ? -EFAULT : 0;
876}
877
878int hci_get_dev_info(void __user *arg)
879{
880 struct hci_dev *hdev;
881 struct hci_dev_info di;
882 unsigned long flags;
883 int err = 0;
884
885 if (copy_from_user(&di, arg, sizeof(di)))
886 return -EFAULT;
887
888 hdev = hci_dev_get(di.dev_id);
889 if (!hdev)
890 return -ENODEV;
891
892 /* When the auto-off is configured it means the transport
893 * is running, but in that case still indicate that the
894 * device is actually down.
895 */
896 if (hci_dev_test_flag(hdev, HCI_AUTO_OFF))
897 flags = hdev->flags & ~BIT(HCI_UP);
898 else
899 flags = hdev->flags;
900
901 strscpy(di.name, hdev->name, sizeof(di.name));
902 di.bdaddr = hdev->bdaddr;
903 di.type = (hdev->bus & 0x0f);
904 di.flags = flags;
905 di.pkt_type = hdev->pkt_type;
906 if (lmp_bredr_capable(hdev)) {
907 di.acl_mtu = hdev->acl_mtu;
908 di.acl_pkts = hdev->acl_pkts;
909 di.sco_mtu = hdev->sco_mtu;
910 di.sco_pkts = hdev->sco_pkts;
911 } else {
912 di.acl_mtu = hdev->le_mtu;
913 di.acl_pkts = hdev->le_pkts;
914 di.sco_mtu = 0;
915 di.sco_pkts = 0;
916 }
917 di.link_policy = hdev->link_policy;
918 di.link_mode = hdev->link_mode;
919
920 memcpy(&di.stat, &hdev->stat, sizeof(di.stat));
921 memcpy(&di.features, &hdev->features, sizeof(di.features));
922
923 if (copy_to_user(arg, &di, sizeof(di)))
924 err = -EFAULT;
925
926 hci_dev_put(hdev);
927
928 return err;
929}
930
931/* ---- Interface to HCI drivers ---- */
932
933static int hci_dev_do_poweroff(struct hci_dev *hdev)
934{
935 int err;
936
937 BT_DBG("%s %p", hdev->name, hdev);
938
939 hci_req_sync_lock(hdev);
940
941 err = hci_set_powered_sync(hdev, false);
942
943 hci_req_sync_unlock(hdev);
944
945 return err;
946}
947
948static int hci_rfkill_set_block(void *data, bool blocked)
949{
950 struct hci_dev *hdev = data;
951 int err;
952
953 BT_DBG("%p name %s blocked %d", hdev, hdev->name, blocked);
954
955 if (hci_dev_test_flag(hdev, HCI_USER_CHANNEL))
956 return -EBUSY;
957
958 if (blocked == hci_dev_test_flag(hdev, HCI_RFKILLED))
959 return 0;
960
961 if (blocked) {
962 hci_dev_set_flag(hdev, HCI_RFKILLED);
963
964 if (!hci_dev_test_flag(hdev, HCI_SETUP) &&
965 !hci_dev_test_flag(hdev, HCI_CONFIG)) {
966 err = hci_dev_do_poweroff(hdev);
967 if (err) {
968 bt_dev_err(hdev, "Error when powering off device on rfkill (%d)",
969 err);
970
971 /* Make sure the device is still closed even if
972 * anything during power off sequence (eg.
973 * disconnecting devices) failed.
974 */
975 hci_dev_do_close(hdev);
976 }
977 }
978 } else {
979 hci_dev_clear_flag(hdev, HCI_RFKILLED);
980 }
981
982 return 0;
983}
984
985static const struct rfkill_ops hci_rfkill_ops = {
986 .set_block = hci_rfkill_set_block,
987};
988
989static void hci_power_on(struct work_struct *work)
990{
991 struct hci_dev *hdev = container_of(work, struct hci_dev, power_on);
992 int err;
993
994 BT_DBG("%s", hdev->name);
995
996 if (test_bit(HCI_UP, &hdev->flags) &&
997 hci_dev_test_flag(hdev, HCI_MGMT) &&
998 hci_dev_test_and_clear_flag(hdev, HCI_AUTO_OFF)) {
999 cancel_delayed_work(&hdev->power_off);
1000 err = hci_powered_update_sync(hdev);
1001 mgmt_power_on(hdev, err);
1002 return;
1003 }
1004
1005 err = hci_dev_do_open(hdev);
1006 if (err < 0) {
1007 hci_dev_lock(hdev);
1008 mgmt_set_powered_failed(hdev, err);
1009 hci_dev_unlock(hdev);
1010 return;
1011 }
1012
1013 /* During the HCI setup phase, a few error conditions are
1014 * ignored and they need to be checked now. If they are still
1015 * valid, it is important to turn the device back off.
1016 */
1017 if (hci_dev_test_flag(hdev, HCI_RFKILLED) ||
1018 hci_dev_test_flag(hdev, HCI_UNCONFIGURED) ||
1019 (!bacmp(&hdev->bdaddr, BDADDR_ANY) &&
1020 !bacmp(&hdev->static_addr, BDADDR_ANY))) {
1021 hci_dev_clear_flag(hdev, HCI_AUTO_OFF);
1022 hci_dev_do_close(hdev);
1023 } else if (hci_dev_test_flag(hdev, HCI_AUTO_OFF)) {
1024 queue_delayed_work(hdev->req_workqueue, &hdev->power_off,
1025 HCI_AUTO_OFF_TIMEOUT);
1026 }
1027
1028 if (hci_dev_test_and_clear_flag(hdev, HCI_SETUP)) {
1029 /* For unconfigured devices, set the HCI_RAW flag
1030 * so that userspace can easily identify them.
1031 */
1032 if (hci_dev_test_flag(hdev, HCI_UNCONFIGURED))
1033 set_bit(HCI_RAW, &hdev->flags);
1034
1035 /* For fully configured devices, this will send
1036 * the Index Added event. For unconfigured devices,
1037 * it will send Unconfigued Index Added event.
1038 *
1039 * Devices with HCI_QUIRK_RAW_DEVICE are ignored
1040 * and no event will be send.
1041 */
1042 mgmt_index_added(hdev);
1043 } else if (hci_dev_test_and_clear_flag(hdev, HCI_CONFIG)) {
1044 /* When the controller is now configured, then it
1045 * is important to clear the HCI_RAW flag.
1046 */
1047 if (!hci_dev_test_flag(hdev, HCI_UNCONFIGURED))
1048 clear_bit(HCI_RAW, &hdev->flags);
1049
1050 /* Powering on the controller with HCI_CONFIG set only
1051 * happens with the transition from unconfigured to
1052 * configured. This will send the Index Added event.
1053 */
1054 mgmt_index_added(hdev);
1055 }
1056}
1057
1058static void hci_power_off(struct work_struct *work)
1059{
1060 struct hci_dev *hdev = container_of(work, struct hci_dev,
1061 power_off.work);
1062
1063 BT_DBG("%s", hdev->name);
1064
1065 hci_dev_do_close(hdev);
1066}
1067
1068static void hci_error_reset(struct work_struct *work)
1069{
1070 struct hci_dev *hdev = container_of(work, struct hci_dev, error_reset);
1071
1072 hci_dev_hold(hdev);
1073 BT_DBG("%s", hdev->name);
1074
1075 if (hdev->hw_error)
1076 hdev->hw_error(hdev, hdev->hw_error_code);
1077 else
1078 bt_dev_err(hdev, "hardware error 0x%2.2x", hdev->hw_error_code);
1079
1080 if (!hci_dev_do_close(hdev))
1081 hci_dev_do_open(hdev);
1082
1083 hci_dev_put(hdev);
1084}
1085
1086void hci_uuids_clear(struct hci_dev *hdev)
1087{
1088 struct bt_uuid *uuid, *tmp;
1089
1090 list_for_each_entry_safe(uuid, tmp, &hdev->uuids, list) {
1091 list_del(&uuid->list);
1092 kfree(uuid);
1093 }
1094}
1095
1096void hci_link_keys_clear(struct hci_dev *hdev)
1097{
1098 struct link_key *key, *tmp;
1099
1100 list_for_each_entry_safe(key, tmp, &hdev->link_keys, list) {
1101 list_del_rcu(&key->list);
1102 kfree_rcu(key, rcu);
1103 }
1104}
1105
1106void hci_smp_ltks_clear(struct hci_dev *hdev)
1107{
1108 struct smp_ltk *k, *tmp;
1109
1110 list_for_each_entry_safe(k, tmp, &hdev->long_term_keys, list) {
1111 list_del_rcu(&k->list);
1112 kfree_rcu(k, rcu);
1113 }
1114}
1115
1116void hci_smp_irks_clear(struct hci_dev *hdev)
1117{
1118 struct smp_irk *k, *tmp;
1119
1120 list_for_each_entry_safe(k, tmp, &hdev->identity_resolving_keys, list) {
1121 list_del_rcu(&k->list);
1122 kfree_rcu(k, rcu);
1123 }
1124}
1125
1126void hci_blocked_keys_clear(struct hci_dev *hdev)
1127{
1128 struct blocked_key *b, *tmp;
1129
1130 list_for_each_entry_safe(b, tmp, &hdev->blocked_keys, list) {
1131 list_del_rcu(&b->list);
1132 kfree_rcu(b, rcu);
1133 }
1134}
1135
1136bool hci_is_blocked_key(struct hci_dev *hdev, u8 type, u8 val[16])
1137{
1138 bool blocked = false;
1139 struct blocked_key *b;
1140
1141 rcu_read_lock();
1142 list_for_each_entry_rcu(b, &hdev->blocked_keys, list) {
1143 if (b->type == type && !memcmp(b->val, val, sizeof(b->val))) {
1144 blocked = true;
1145 break;
1146 }
1147 }
1148
1149 rcu_read_unlock();
1150 return blocked;
1151}
1152
1153struct link_key *hci_find_link_key(struct hci_dev *hdev, bdaddr_t *bdaddr)
1154{
1155 struct link_key *k;
1156
1157 rcu_read_lock();
1158 list_for_each_entry_rcu(k, &hdev->link_keys, list) {
1159 if (bacmp(bdaddr, &k->bdaddr) == 0) {
1160 rcu_read_unlock();
1161
1162 if (hci_is_blocked_key(hdev,
1163 HCI_BLOCKED_KEY_TYPE_LINKKEY,
1164 k->val)) {
1165 bt_dev_warn_ratelimited(hdev,
1166 "Link key blocked for %pMR",
1167 &k->bdaddr);
1168 return NULL;
1169 }
1170
1171 return k;
1172 }
1173 }
1174 rcu_read_unlock();
1175
1176 return NULL;
1177}
1178
1179static bool hci_persistent_key(struct hci_dev *hdev, struct hci_conn *conn,
1180 u8 key_type, u8 old_key_type)
1181{
1182 /* Legacy key */
1183 if (key_type < 0x03)
1184 return true;
1185
1186 /* Debug keys are insecure so don't store them persistently */
1187 if (key_type == HCI_LK_DEBUG_COMBINATION)
1188 return false;
1189
1190 /* Changed combination key and there's no previous one */
1191 if (key_type == HCI_LK_CHANGED_COMBINATION && old_key_type == 0xff)
1192 return false;
1193
1194 /* Security mode 3 case */
1195 if (!conn)
1196 return true;
1197
1198 /* BR/EDR key derived using SC from an LE link */
1199 if (conn->type == LE_LINK)
1200 return true;
1201
1202 /* Neither local nor remote side had no-bonding as requirement */
1203 if (conn->auth_type > 0x01 && conn->remote_auth > 0x01)
1204 return true;
1205
1206 /* Local side had dedicated bonding as requirement */
1207 if (conn->auth_type == 0x02 || conn->auth_type == 0x03)
1208 return true;
1209
1210 /* Remote side had dedicated bonding as requirement */
1211 if (conn->remote_auth == 0x02 || conn->remote_auth == 0x03)
1212 return true;
1213
1214 /* If none of the above criteria match, then don't store the key
1215 * persistently */
1216 return false;
1217}
1218
1219static u8 ltk_role(u8 type)
1220{
1221 if (type == SMP_LTK)
1222 return HCI_ROLE_MASTER;
1223
1224 return HCI_ROLE_SLAVE;
1225}
1226
1227struct smp_ltk *hci_find_ltk(struct hci_dev *hdev, bdaddr_t *bdaddr,
1228 u8 addr_type, u8 role)
1229{
1230 struct smp_ltk *k;
1231
1232 rcu_read_lock();
1233 list_for_each_entry_rcu(k, &hdev->long_term_keys, list) {
1234 if (addr_type != k->bdaddr_type || bacmp(bdaddr, &k->bdaddr))
1235 continue;
1236
1237 if (smp_ltk_is_sc(k) || ltk_role(k->type) == role) {
1238 rcu_read_unlock();
1239
1240 if (hci_is_blocked_key(hdev, HCI_BLOCKED_KEY_TYPE_LTK,
1241 k->val)) {
1242 bt_dev_warn_ratelimited(hdev,
1243 "LTK blocked for %pMR",
1244 &k->bdaddr);
1245 return NULL;
1246 }
1247
1248 return k;
1249 }
1250 }
1251 rcu_read_unlock();
1252
1253 return NULL;
1254}
1255
1256struct smp_irk *hci_find_irk_by_rpa(struct hci_dev *hdev, bdaddr_t *rpa)
1257{
1258 struct smp_irk *irk_to_return = NULL;
1259 struct smp_irk *irk;
1260
1261 rcu_read_lock();
1262 list_for_each_entry_rcu(irk, &hdev->identity_resolving_keys, list) {
1263 if (!bacmp(&irk->rpa, rpa)) {
1264 irk_to_return = irk;
1265 goto done;
1266 }
1267 }
1268
1269 list_for_each_entry_rcu(irk, &hdev->identity_resolving_keys, list) {
1270 if (smp_irk_matches(hdev, irk->val, rpa)) {
1271 bacpy(&irk->rpa, rpa);
1272 irk_to_return = irk;
1273 goto done;
1274 }
1275 }
1276
1277done:
1278 if (irk_to_return && hci_is_blocked_key(hdev, HCI_BLOCKED_KEY_TYPE_IRK,
1279 irk_to_return->val)) {
1280 bt_dev_warn_ratelimited(hdev, "Identity key blocked for %pMR",
1281 &irk_to_return->bdaddr);
1282 irk_to_return = NULL;
1283 }
1284
1285 rcu_read_unlock();
1286
1287 return irk_to_return;
1288}
1289
1290struct smp_irk *hci_find_irk_by_addr(struct hci_dev *hdev, bdaddr_t *bdaddr,
1291 u8 addr_type)
1292{
1293 struct smp_irk *irk_to_return = NULL;
1294 struct smp_irk *irk;
1295
1296 /* Identity Address must be public or static random */
1297 if (addr_type == ADDR_LE_DEV_RANDOM && (bdaddr->b[5] & 0xc0) != 0xc0)
1298 return NULL;
1299
1300 rcu_read_lock();
1301 list_for_each_entry_rcu(irk, &hdev->identity_resolving_keys, list) {
1302 if (addr_type == irk->addr_type &&
1303 bacmp(bdaddr, &irk->bdaddr) == 0) {
1304 irk_to_return = irk;
1305 goto done;
1306 }
1307 }
1308
1309done:
1310
1311 if (irk_to_return && hci_is_blocked_key(hdev, HCI_BLOCKED_KEY_TYPE_IRK,
1312 irk_to_return->val)) {
1313 bt_dev_warn_ratelimited(hdev, "Identity key blocked for %pMR",
1314 &irk_to_return->bdaddr);
1315 irk_to_return = NULL;
1316 }
1317
1318 rcu_read_unlock();
1319
1320 return irk_to_return;
1321}
1322
1323struct link_key *hci_add_link_key(struct hci_dev *hdev, struct hci_conn *conn,
1324 bdaddr_t *bdaddr, u8 *val, u8 type,
1325 u8 pin_len, bool *persistent)
1326{
1327 struct link_key *key, *old_key;
1328 u8 old_key_type;
1329
1330 old_key = hci_find_link_key(hdev, bdaddr);
1331 if (old_key) {
1332 old_key_type = old_key->type;
1333 key = old_key;
1334 } else {
1335 old_key_type = conn ? conn->key_type : 0xff;
1336 key = kzalloc(sizeof(*key), GFP_KERNEL);
1337 if (!key)
1338 return NULL;
1339 list_add_rcu(&key->list, &hdev->link_keys);
1340 }
1341
1342 BT_DBG("%s key for %pMR type %u", hdev->name, bdaddr, type);
1343
1344 /* Some buggy controller combinations generate a changed
1345 * combination key for legacy pairing even when there's no
1346 * previous key */
1347 if (type == HCI_LK_CHANGED_COMBINATION &&
1348 (!conn || conn->remote_auth == 0xff) && old_key_type == 0xff) {
1349 type = HCI_LK_COMBINATION;
1350 if (conn)
1351 conn->key_type = type;
1352 }
1353
1354 bacpy(&key->bdaddr, bdaddr);
1355 memcpy(key->val, val, HCI_LINK_KEY_SIZE);
1356 key->pin_len = pin_len;
1357
1358 if (type == HCI_LK_CHANGED_COMBINATION)
1359 key->type = old_key_type;
1360 else
1361 key->type = type;
1362
1363 if (persistent)
1364 *persistent = hci_persistent_key(hdev, conn, type,
1365 old_key_type);
1366
1367 return key;
1368}
1369
1370struct smp_ltk *hci_add_ltk(struct hci_dev *hdev, bdaddr_t *bdaddr,
1371 u8 addr_type, u8 type, u8 authenticated,
1372 u8 tk[16], u8 enc_size, __le16 ediv, __le64 rand)
1373{
1374 struct smp_ltk *key, *old_key;
1375 u8 role = ltk_role(type);
1376
1377 old_key = hci_find_ltk(hdev, bdaddr, addr_type, role);
1378 if (old_key)
1379 key = old_key;
1380 else {
1381 key = kzalloc(sizeof(*key), GFP_KERNEL);
1382 if (!key)
1383 return NULL;
1384 list_add_rcu(&key->list, &hdev->long_term_keys);
1385 }
1386
1387 bacpy(&key->bdaddr, bdaddr);
1388 key->bdaddr_type = addr_type;
1389 memcpy(key->val, tk, sizeof(key->val));
1390 key->authenticated = authenticated;
1391 key->ediv = ediv;
1392 key->rand = rand;
1393 key->enc_size = enc_size;
1394 key->type = type;
1395
1396 return key;
1397}
1398
1399struct smp_irk *hci_add_irk(struct hci_dev *hdev, bdaddr_t *bdaddr,
1400 u8 addr_type, u8 val[16], bdaddr_t *rpa)
1401{
1402 struct smp_irk *irk;
1403
1404 irk = hci_find_irk_by_addr(hdev, bdaddr, addr_type);
1405 if (!irk) {
1406 irk = kzalloc(sizeof(*irk), GFP_KERNEL);
1407 if (!irk)
1408 return NULL;
1409
1410 bacpy(&irk->bdaddr, bdaddr);
1411 irk->addr_type = addr_type;
1412
1413 list_add_rcu(&irk->list, &hdev->identity_resolving_keys);
1414 }
1415
1416 memcpy(irk->val, val, 16);
1417 bacpy(&irk->rpa, rpa);
1418
1419 return irk;
1420}
1421
1422int hci_remove_link_key(struct hci_dev *hdev, bdaddr_t *bdaddr)
1423{
1424 struct link_key *key;
1425
1426 key = hci_find_link_key(hdev, bdaddr);
1427 if (!key)
1428 return -ENOENT;
1429
1430 BT_DBG("%s removing %pMR", hdev->name, bdaddr);
1431
1432 list_del_rcu(&key->list);
1433 kfree_rcu(key, rcu);
1434
1435 return 0;
1436}
1437
1438int hci_remove_ltk(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 bdaddr_type)
1439{
1440 struct smp_ltk *k, *tmp;
1441 int removed = 0;
1442
1443 list_for_each_entry_safe(k, tmp, &hdev->long_term_keys, list) {
1444 if (bacmp(bdaddr, &k->bdaddr) || k->bdaddr_type != bdaddr_type)
1445 continue;
1446
1447 BT_DBG("%s removing %pMR", hdev->name, bdaddr);
1448
1449 list_del_rcu(&k->list);
1450 kfree_rcu(k, rcu);
1451 removed++;
1452 }
1453
1454 return removed ? 0 : -ENOENT;
1455}
1456
1457void hci_remove_irk(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 addr_type)
1458{
1459 struct smp_irk *k, *tmp;
1460
1461 list_for_each_entry_safe(k, tmp, &hdev->identity_resolving_keys, list) {
1462 if (bacmp(bdaddr, &k->bdaddr) || k->addr_type != addr_type)
1463 continue;
1464
1465 BT_DBG("%s removing %pMR", hdev->name, bdaddr);
1466
1467 list_del_rcu(&k->list);
1468 kfree_rcu(k, rcu);
1469 }
1470}
1471
1472bool hci_bdaddr_is_paired(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 type)
1473{
1474 struct smp_ltk *k;
1475 struct smp_irk *irk;
1476 u8 addr_type;
1477
1478 if (type == BDADDR_BREDR) {
1479 if (hci_find_link_key(hdev, bdaddr))
1480 return true;
1481 return false;
1482 }
1483
1484 /* Convert to HCI addr type which struct smp_ltk uses */
1485 if (type == BDADDR_LE_PUBLIC)
1486 addr_type = ADDR_LE_DEV_PUBLIC;
1487 else
1488 addr_type = ADDR_LE_DEV_RANDOM;
1489
1490 irk = hci_get_irk(hdev, bdaddr, addr_type);
1491 if (irk) {
1492 bdaddr = &irk->bdaddr;
1493 addr_type = irk->addr_type;
1494 }
1495
1496 rcu_read_lock();
1497 list_for_each_entry_rcu(k, &hdev->long_term_keys, list) {
1498 if (k->bdaddr_type == addr_type && !bacmp(bdaddr, &k->bdaddr)) {
1499 rcu_read_unlock();
1500 return true;
1501 }
1502 }
1503 rcu_read_unlock();
1504
1505 return false;
1506}
1507
1508/* HCI command timer function */
1509static void hci_cmd_timeout(struct work_struct *work)
1510{
1511 struct hci_dev *hdev = container_of(work, struct hci_dev,
1512 cmd_timer.work);
1513
1514 if (hdev->req_skb) {
1515 u16 opcode = hci_skb_opcode(hdev->req_skb);
1516
1517 bt_dev_err(hdev, "command 0x%4.4x tx timeout", opcode);
1518
1519 hci_cmd_sync_cancel_sync(hdev, ETIMEDOUT);
1520 } else {
1521 bt_dev_err(hdev, "command tx timeout");
1522 }
1523
1524 if (hdev->cmd_timeout)
1525 hdev->cmd_timeout(hdev);
1526
1527 atomic_set(&hdev->cmd_cnt, 1);
1528 queue_work(hdev->workqueue, &hdev->cmd_work);
1529}
1530
1531/* HCI ncmd timer function */
1532static void hci_ncmd_timeout(struct work_struct *work)
1533{
1534 struct hci_dev *hdev = container_of(work, struct hci_dev,
1535 ncmd_timer.work);
1536
1537 bt_dev_err(hdev, "Controller not accepting commands anymore: ncmd = 0");
1538
1539 /* During HCI_INIT phase no events can be injected if the ncmd timer
1540 * triggers since the procedure has its own timeout handling.
1541 */
1542 if (test_bit(HCI_INIT, &hdev->flags))
1543 return;
1544
1545 /* This is an irrecoverable state, inject hardware error event */
1546 hci_reset_dev(hdev);
1547}
1548
1549struct oob_data *hci_find_remote_oob_data(struct hci_dev *hdev,
1550 bdaddr_t *bdaddr, u8 bdaddr_type)
1551{
1552 struct oob_data *data;
1553
1554 list_for_each_entry(data, &hdev->remote_oob_data, list) {
1555 if (bacmp(bdaddr, &data->bdaddr) != 0)
1556 continue;
1557 if (data->bdaddr_type != bdaddr_type)
1558 continue;
1559 return data;
1560 }
1561
1562 return NULL;
1563}
1564
1565int hci_remove_remote_oob_data(struct hci_dev *hdev, bdaddr_t *bdaddr,
1566 u8 bdaddr_type)
1567{
1568 struct oob_data *data;
1569
1570 data = hci_find_remote_oob_data(hdev, bdaddr, bdaddr_type);
1571 if (!data)
1572 return -ENOENT;
1573
1574 BT_DBG("%s removing %pMR (%u)", hdev->name, bdaddr, bdaddr_type);
1575
1576 list_del(&data->list);
1577 kfree(data);
1578
1579 return 0;
1580}
1581
1582void hci_remote_oob_data_clear(struct hci_dev *hdev)
1583{
1584 struct oob_data *data, *n;
1585
1586 list_for_each_entry_safe(data, n, &hdev->remote_oob_data, list) {
1587 list_del(&data->list);
1588 kfree(data);
1589 }
1590}
1591
1592int hci_add_remote_oob_data(struct hci_dev *hdev, bdaddr_t *bdaddr,
1593 u8 bdaddr_type, u8 *hash192, u8 *rand192,
1594 u8 *hash256, u8 *rand256)
1595{
1596 struct oob_data *data;
1597
1598 data = hci_find_remote_oob_data(hdev, bdaddr, bdaddr_type);
1599 if (!data) {
1600 data = kmalloc(sizeof(*data), GFP_KERNEL);
1601 if (!data)
1602 return -ENOMEM;
1603
1604 bacpy(&data->bdaddr, bdaddr);
1605 data->bdaddr_type = bdaddr_type;
1606 list_add(&data->list, &hdev->remote_oob_data);
1607 }
1608
1609 if (hash192 && rand192) {
1610 memcpy(data->hash192, hash192, sizeof(data->hash192));
1611 memcpy(data->rand192, rand192, sizeof(data->rand192));
1612 if (hash256 && rand256)
1613 data->present = 0x03;
1614 } else {
1615 memset(data->hash192, 0, sizeof(data->hash192));
1616 memset(data->rand192, 0, sizeof(data->rand192));
1617 if (hash256 && rand256)
1618 data->present = 0x02;
1619 else
1620 data->present = 0x00;
1621 }
1622
1623 if (hash256 && rand256) {
1624 memcpy(data->hash256, hash256, sizeof(data->hash256));
1625 memcpy(data->rand256, rand256, sizeof(data->rand256));
1626 } else {
1627 memset(data->hash256, 0, sizeof(data->hash256));
1628 memset(data->rand256, 0, sizeof(data->rand256));
1629 if (hash192 && rand192)
1630 data->present = 0x01;
1631 }
1632
1633 BT_DBG("%s for %pMR", hdev->name, bdaddr);
1634
1635 return 0;
1636}
1637
1638/* This function requires the caller holds hdev->lock */
1639struct adv_info *hci_find_adv_instance(struct hci_dev *hdev, u8 instance)
1640{
1641 struct adv_info *adv_instance;
1642
1643 list_for_each_entry(adv_instance, &hdev->adv_instances, list) {
1644 if (adv_instance->instance == instance)
1645 return adv_instance;
1646 }
1647
1648 return NULL;
1649}
1650
1651/* This function requires the caller holds hdev->lock */
1652struct adv_info *hci_get_next_instance(struct hci_dev *hdev, u8 instance)
1653{
1654 struct adv_info *cur_instance;
1655
1656 cur_instance = hci_find_adv_instance(hdev, instance);
1657 if (!cur_instance)
1658 return NULL;
1659
1660 if (cur_instance == list_last_entry(&hdev->adv_instances,
1661 struct adv_info, list))
1662 return list_first_entry(&hdev->adv_instances,
1663 struct adv_info, list);
1664 else
1665 return list_next_entry(cur_instance, list);
1666}
1667
1668/* This function requires the caller holds hdev->lock */
1669int hci_remove_adv_instance(struct hci_dev *hdev, u8 instance)
1670{
1671 struct adv_info *adv_instance;
1672
1673 adv_instance = hci_find_adv_instance(hdev, instance);
1674 if (!adv_instance)
1675 return -ENOENT;
1676
1677 BT_DBG("%s removing %dMR", hdev->name, instance);
1678
1679 if (hdev->cur_adv_instance == instance) {
1680 if (hdev->adv_instance_timeout) {
1681 cancel_delayed_work(&hdev->adv_instance_expire);
1682 hdev->adv_instance_timeout = 0;
1683 }
1684 hdev->cur_adv_instance = 0x00;
1685 }
1686
1687 cancel_delayed_work_sync(&adv_instance->rpa_expired_cb);
1688
1689 list_del(&adv_instance->list);
1690 kfree(adv_instance);
1691
1692 hdev->adv_instance_cnt--;
1693
1694 return 0;
1695}
1696
1697void hci_adv_instances_set_rpa_expired(struct hci_dev *hdev, bool rpa_expired)
1698{
1699 struct adv_info *adv_instance, *n;
1700
1701 list_for_each_entry_safe(adv_instance, n, &hdev->adv_instances, list)
1702 adv_instance->rpa_expired = rpa_expired;
1703}
1704
1705/* This function requires the caller holds hdev->lock */
1706void hci_adv_instances_clear(struct hci_dev *hdev)
1707{
1708 struct adv_info *adv_instance, *n;
1709
1710 if (hdev->adv_instance_timeout) {
1711 cancel_delayed_work(&hdev->adv_instance_expire);
1712 hdev->adv_instance_timeout = 0;
1713 }
1714
1715 list_for_each_entry_safe(adv_instance, n, &hdev->adv_instances, list) {
1716 cancel_delayed_work_sync(&adv_instance->rpa_expired_cb);
1717 list_del(&adv_instance->list);
1718 kfree(adv_instance);
1719 }
1720
1721 hdev->adv_instance_cnt = 0;
1722 hdev->cur_adv_instance = 0x00;
1723}
1724
1725static void adv_instance_rpa_expired(struct work_struct *work)
1726{
1727 struct adv_info *adv_instance = container_of(work, struct adv_info,
1728 rpa_expired_cb.work);
1729
1730 BT_DBG("");
1731
1732 adv_instance->rpa_expired = true;
1733}
1734
1735/* This function requires the caller holds hdev->lock */
1736struct adv_info *hci_add_adv_instance(struct hci_dev *hdev, u8 instance,
1737 u32 flags, u16 adv_data_len, u8 *adv_data,
1738 u16 scan_rsp_len, u8 *scan_rsp_data,
1739 u16 timeout, u16 duration, s8 tx_power,
1740 u32 min_interval, u32 max_interval,
1741 u8 mesh_handle)
1742{
1743 struct adv_info *adv;
1744
1745 adv = hci_find_adv_instance(hdev, instance);
1746 if (adv) {
1747 memset(adv->adv_data, 0, sizeof(adv->adv_data));
1748 memset(adv->scan_rsp_data, 0, sizeof(adv->scan_rsp_data));
1749 memset(adv->per_adv_data, 0, sizeof(adv->per_adv_data));
1750 } else {
1751 if (hdev->adv_instance_cnt >= hdev->le_num_of_adv_sets ||
1752 instance < 1 || instance > hdev->le_num_of_adv_sets + 1)
1753 return ERR_PTR(-EOVERFLOW);
1754
1755 adv = kzalloc(sizeof(*adv), GFP_KERNEL);
1756 if (!adv)
1757 return ERR_PTR(-ENOMEM);
1758
1759 adv->pending = true;
1760 adv->instance = instance;
1761
1762 /* If controller support only one set and the instance is set to
1763 * 1 then there is no option other than using handle 0x00.
1764 */
1765 if (hdev->le_num_of_adv_sets == 1 && instance == 1)
1766 adv->handle = 0x00;
1767 else
1768 adv->handle = instance;
1769
1770 list_add(&adv->list, &hdev->adv_instances);
1771 hdev->adv_instance_cnt++;
1772 }
1773
1774 adv->flags = flags;
1775 adv->min_interval = min_interval;
1776 adv->max_interval = max_interval;
1777 adv->tx_power = tx_power;
1778 /* Defining a mesh_handle changes the timing units to ms,
1779 * rather than seconds, and ties the instance to the requested
1780 * mesh_tx queue.
1781 */
1782 adv->mesh = mesh_handle;
1783
1784 hci_set_adv_instance_data(hdev, instance, adv_data_len, adv_data,
1785 scan_rsp_len, scan_rsp_data);
1786
1787 adv->timeout = timeout;
1788 adv->remaining_time = timeout;
1789
1790 if (duration == 0)
1791 adv->duration = hdev->def_multi_adv_rotation_duration;
1792 else
1793 adv->duration = duration;
1794
1795 INIT_DELAYED_WORK(&adv->rpa_expired_cb, adv_instance_rpa_expired);
1796
1797 BT_DBG("%s for %dMR", hdev->name, instance);
1798
1799 return adv;
1800}
1801
1802/* This function requires the caller holds hdev->lock */
1803struct adv_info *hci_add_per_instance(struct hci_dev *hdev, u8 instance,
1804 u32 flags, u8 data_len, u8 *data,
1805 u32 min_interval, u32 max_interval)
1806{
1807 struct adv_info *adv;
1808
1809 adv = hci_add_adv_instance(hdev, instance, flags, 0, NULL, 0, NULL,
1810 0, 0, HCI_ADV_TX_POWER_NO_PREFERENCE,
1811 min_interval, max_interval, 0);
1812 if (IS_ERR(adv))
1813 return adv;
1814
1815 adv->periodic = true;
1816 adv->per_adv_data_len = data_len;
1817
1818 if (data)
1819 memcpy(adv->per_adv_data, data, data_len);
1820
1821 return adv;
1822}
1823
1824/* This function requires the caller holds hdev->lock */
1825int hci_set_adv_instance_data(struct hci_dev *hdev, u8 instance,
1826 u16 adv_data_len, u8 *adv_data,
1827 u16 scan_rsp_len, u8 *scan_rsp_data)
1828{
1829 struct adv_info *adv;
1830
1831 adv = hci_find_adv_instance(hdev, instance);
1832
1833 /* If advertisement doesn't exist, we can't modify its data */
1834 if (!adv)
1835 return -ENOENT;
1836
1837 if (adv_data_len && ADV_DATA_CMP(adv, adv_data, adv_data_len)) {
1838 memset(adv->adv_data, 0, sizeof(adv->adv_data));
1839 memcpy(adv->adv_data, adv_data, adv_data_len);
1840 adv->adv_data_len = adv_data_len;
1841 adv->adv_data_changed = true;
1842 }
1843
1844 if (scan_rsp_len && SCAN_RSP_CMP(adv, scan_rsp_data, scan_rsp_len)) {
1845 memset(adv->scan_rsp_data, 0, sizeof(adv->scan_rsp_data));
1846 memcpy(adv->scan_rsp_data, scan_rsp_data, scan_rsp_len);
1847 adv->scan_rsp_len = scan_rsp_len;
1848 adv->scan_rsp_changed = true;
1849 }
1850
1851 /* Mark as changed if there are flags which would affect it */
1852 if (((adv->flags & MGMT_ADV_FLAG_APPEARANCE) && hdev->appearance) ||
1853 adv->flags & MGMT_ADV_FLAG_LOCAL_NAME)
1854 adv->scan_rsp_changed = true;
1855
1856 return 0;
1857}
1858
1859/* This function requires the caller holds hdev->lock */
1860u32 hci_adv_instance_flags(struct hci_dev *hdev, u8 instance)
1861{
1862 u32 flags;
1863 struct adv_info *adv;
1864
1865 if (instance == 0x00) {
1866 /* Instance 0 always manages the "Tx Power" and "Flags"
1867 * fields
1868 */
1869 flags = MGMT_ADV_FLAG_TX_POWER | MGMT_ADV_FLAG_MANAGED_FLAGS;
1870
1871 /* For instance 0, the HCI_ADVERTISING_CONNECTABLE setting
1872 * corresponds to the "connectable" instance flag.
1873 */
1874 if (hci_dev_test_flag(hdev, HCI_ADVERTISING_CONNECTABLE))
1875 flags |= MGMT_ADV_FLAG_CONNECTABLE;
1876
1877 if (hci_dev_test_flag(hdev, HCI_LIMITED_DISCOVERABLE))
1878 flags |= MGMT_ADV_FLAG_LIMITED_DISCOV;
1879 else if (hci_dev_test_flag(hdev, HCI_DISCOVERABLE))
1880 flags |= MGMT_ADV_FLAG_DISCOV;
1881
1882 return flags;
1883 }
1884
1885 adv = hci_find_adv_instance(hdev, instance);
1886
1887 /* Return 0 when we got an invalid instance identifier. */
1888 if (!adv)
1889 return 0;
1890
1891 return adv->flags;
1892}
1893
1894bool hci_adv_instance_is_scannable(struct hci_dev *hdev, u8 instance)
1895{
1896 struct adv_info *adv;
1897
1898 /* Instance 0x00 always set local name */
1899 if (instance == 0x00)
1900 return true;
1901
1902 adv = hci_find_adv_instance(hdev, instance);
1903 if (!adv)
1904 return false;
1905
1906 if (adv->flags & MGMT_ADV_FLAG_APPEARANCE ||
1907 adv->flags & MGMT_ADV_FLAG_LOCAL_NAME)
1908 return true;
1909
1910 return adv->scan_rsp_len ? true : false;
1911}
1912
1913/* This function requires the caller holds hdev->lock */
1914void hci_adv_monitors_clear(struct hci_dev *hdev)
1915{
1916 struct adv_monitor *monitor;
1917 int handle;
1918
1919 idr_for_each_entry(&hdev->adv_monitors_idr, monitor, handle)
1920 hci_free_adv_monitor(hdev, monitor);
1921
1922 idr_destroy(&hdev->adv_monitors_idr);
1923}
1924
1925/* Frees the monitor structure and do some bookkeepings.
1926 * This function requires the caller holds hdev->lock.
1927 */
1928void hci_free_adv_monitor(struct hci_dev *hdev, struct adv_monitor *monitor)
1929{
1930 struct adv_pattern *pattern;
1931 struct adv_pattern *tmp;
1932
1933 if (!monitor)
1934 return;
1935
1936 list_for_each_entry_safe(pattern, tmp, &monitor->patterns, list) {
1937 list_del(&pattern->list);
1938 kfree(pattern);
1939 }
1940
1941 if (monitor->handle)
1942 idr_remove(&hdev->adv_monitors_idr, monitor->handle);
1943
1944 if (monitor->state != ADV_MONITOR_STATE_NOT_REGISTERED) {
1945 hdev->adv_monitors_cnt--;
1946 mgmt_adv_monitor_removed(hdev, monitor->handle);
1947 }
1948
1949 kfree(monitor);
1950}
1951
1952/* Assigns handle to a monitor, and if offloading is supported and power is on,
1953 * also attempts to forward the request to the controller.
1954 * This function requires the caller holds hci_req_sync_lock.
1955 */
1956int hci_add_adv_monitor(struct hci_dev *hdev, struct adv_monitor *monitor)
1957{
1958 int min, max, handle;
1959 int status = 0;
1960
1961 if (!monitor)
1962 return -EINVAL;
1963
1964 hci_dev_lock(hdev);
1965
1966 min = HCI_MIN_ADV_MONITOR_HANDLE;
1967 max = HCI_MIN_ADV_MONITOR_HANDLE + HCI_MAX_ADV_MONITOR_NUM_HANDLES;
1968 handle = idr_alloc(&hdev->adv_monitors_idr, monitor, min, max,
1969 GFP_KERNEL);
1970
1971 hci_dev_unlock(hdev);
1972
1973 if (handle < 0)
1974 return handle;
1975
1976 monitor->handle = handle;
1977
1978 if (!hdev_is_powered(hdev))
1979 return status;
1980
1981 switch (hci_get_adv_monitor_offload_ext(hdev)) {
1982 case HCI_ADV_MONITOR_EXT_NONE:
1983 bt_dev_dbg(hdev, "add monitor %d status %d",
1984 monitor->handle, status);
1985 /* Message was not forwarded to controller - not an error */
1986 break;
1987
1988 case HCI_ADV_MONITOR_EXT_MSFT:
1989 status = msft_add_monitor_pattern(hdev, monitor);
1990 bt_dev_dbg(hdev, "add monitor %d msft status %d",
1991 handle, status);
1992 break;
1993 }
1994
1995 return status;
1996}
1997
1998/* Attempts to tell the controller and free the monitor. If somehow the
1999 * controller doesn't have a corresponding handle, remove anyway.
2000 * This function requires the caller holds hci_req_sync_lock.
2001 */
2002static int hci_remove_adv_monitor(struct hci_dev *hdev,
2003 struct adv_monitor *monitor)
2004{
2005 int status = 0;
2006 int handle;
2007
2008 switch (hci_get_adv_monitor_offload_ext(hdev)) {
2009 case HCI_ADV_MONITOR_EXT_NONE: /* also goes here when powered off */
2010 bt_dev_dbg(hdev, "remove monitor %d status %d",
2011 monitor->handle, status);
2012 goto free_monitor;
2013
2014 case HCI_ADV_MONITOR_EXT_MSFT:
2015 handle = monitor->handle;
2016 status = msft_remove_monitor(hdev, monitor);
2017 bt_dev_dbg(hdev, "remove monitor %d msft status %d",
2018 handle, status);
2019 break;
2020 }
2021
2022 /* In case no matching handle registered, just free the monitor */
2023 if (status == -ENOENT)
2024 goto free_monitor;
2025
2026 return status;
2027
2028free_monitor:
2029 if (status == -ENOENT)
2030 bt_dev_warn(hdev, "Removing monitor with no matching handle %d",
2031 monitor->handle);
2032 hci_free_adv_monitor(hdev, monitor);
2033
2034 return status;
2035}
2036
2037/* This function requires the caller holds hci_req_sync_lock */
2038int hci_remove_single_adv_monitor(struct hci_dev *hdev, u16 handle)
2039{
2040 struct adv_monitor *monitor = idr_find(&hdev->adv_monitors_idr, handle);
2041
2042 if (!monitor)
2043 return -EINVAL;
2044
2045 return hci_remove_adv_monitor(hdev, monitor);
2046}
2047
2048/* This function requires the caller holds hci_req_sync_lock */
2049int hci_remove_all_adv_monitor(struct hci_dev *hdev)
2050{
2051 struct adv_monitor *monitor;
2052 int idr_next_id = 0;
2053 int status = 0;
2054
2055 while (1) {
2056 monitor = idr_get_next(&hdev->adv_monitors_idr, &idr_next_id);
2057 if (!monitor)
2058 break;
2059
2060 status = hci_remove_adv_monitor(hdev, monitor);
2061 if (status)
2062 return status;
2063
2064 idr_next_id++;
2065 }
2066
2067 return status;
2068}
2069
2070/* This function requires the caller holds hdev->lock */
2071bool hci_is_adv_monitoring(struct hci_dev *hdev)
2072{
2073 return !idr_is_empty(&hdev->adv_monitors_idr);
2074}
2075
2076int hci_get_adv_monitor_offload_ext(struct hci_dev *hdev)
2077{
2078 if (msft_monitor_supported(hdev))
2079 return HCI_ADV_MONITOR_EXT_MSFT;
2080
2081 return HCI_ADV_MONITOR_EXT_NONE;
2082}
2083
2084struct bdaddr_list *hci_bdaddr_list_lookup(struct list_head *bdaddr_list,
2085 bdaddr_t *bdaddr, u8 type)
2086{
2087 struct bdaddr_list *b;
2088
2089 list_for_each_entry(b, bdaddr_list, list) {
2090 if (!bacmp(&b->bdaddr, bdaddr) && b->bdaddr_type == type)
2091 return b;
2092 }
2093
2094 return NULL;
2095}
2096
2097struct bdaddr_list_with_irk *hci_bdaddr_list_lookup_with_irk(
2098 struct list_head *bdaddr_list, bdaddr_t *bdaddr,
2099 u8 type)
2100{
2101 struct bdaddr_list_with_irk *b;
2102
2103 list_for_each_entry(b, bdaddr_list, list) {
2104 if (!bacmp(&b->bdaddr, bdaddr) && b->bdaddr_type == type)
2105 return b;
2106 }
2107
2108 return NULL;
2109}
2110
2111struct bdaddr_list_with_flags *
2112hci_bdaddr_list_lookup_with_flags(struct list_head *bdaddr_list,
2113 bdaddr_t *bdaddr, u8 type)
2114{
2115 struct bdaddr_list_with_flags *b;
2116
2117 list_for_each_entry(b, bdaddr_list, list) {
2118 if (!bacmp(&b->bdaddr, bdaddr) && b->bdaddr_type == type)
2119 return b;
2120 }
2121
2122 return NULL;
2123}
2124
2125void hci_bdaddr_list_clear(struct list_head *bdaddr_list)
2126{
2127 struct bdaddr_list *b, *n;
2128
2129 list_for_each_entry_safe(b, n, bdaddr_list, list) {
2130 list_del(&b->list);
2131 kfree(b);
2132 }
2133}
2134
2135int hci_bdaddr_list_add(struct list_head *list, bdaddr_t *bdaddr, u8 type)
2136{
2137 struct bdaddr_list *entry;
2138
2139 if (!bacmp(bdaddr, BDADDR_ANY))
2140 return -EBADF;
2141
2142 if (hci_bdaddr_list_lookup(list, bdaddr, type))
2143 return -EEXIST;
2144
2145 entry = kzalloc(sizeof(*entry), GFP_KERNEL);
2146 if (!entry)
2147 return -ENOMEM;
2148
2149 bacpy(&entry->bdaddr, bdaddr);
2150 entry->bdaddr_type = type;
2151
2152 list_add(&entry->list, list);
2153
2154 return 0;
2155}
2156
2157int hci_bdaddr_list_add_with_irk(struct list_head *list, bdaddr_t *bdaddr,
2158 u8 type, u8 *peer_irk, u8 *local_irk)
2159{
2160 struct bdaddr_list_with_irk *entry;
2161
2162 if (!bacmp(bdaddr, BDADDR_ANY))
2163 return -EBADF;
2164
2165 if (hci_bdaddr_list_lookup(list, bdaddr, type))
2166 return -EEXIST;
2167
2168 entry = kzalloc(sizeof(*entry), GFP_KERNEL);
2169 if (!entry)
2170 return -ENOMEM;
2171
2172 bacpy(&entry->bdaddr, bdaddr);
2173 entry->bdaddr_type = type;
2174
2175 if (peer_irk)
2176 memcpy(entry->peer_irk, peer_irk, 16);
2177
2178 if (local_irk)
2179 memcpy(entry->local_irk, local_irk, 16);
2180
2181 list_add(&entry->list, list);
2182
2183 return 0;
2184}
2185
2186int hci_bdaddr_list_add_with_flags(struct list_head *list, bdaddr_t *bdaddr,
2187 u8 type, u32 flags)
2188{
2189 struct bdaddr_list_with_flags *entry;
2190
2191 if (!bacmp(bdaddr, BDADDR_ANY))
2192 return -EBADF;
2193
2194 if (hci_bdaddr_list_lookup(list, bdaddr, type))
2195 return -EEXIST;
2196
2197 entry = kzalloc(sizeof(*entry), GFP_KERNEL);
2198 if (!entry)
2199 return -ENOMEM;
2200
2201 bacpy(&entry->bdaddr, bdaddr);
2202 entry->bdaddr_type = type;
2203 entry->flags = flags;
2204
2205 list_add(&entry->list, list);
2206
2207 return 0;
2208}
2209
2210int hci_bdaddr_list_del(struct list_head *list, bdaddr_t *bdaddr, u8 type)
2211{
2212 struct bdaddr_list *entry;
2213
2214 if (!bacmp(bdaddr, BDADDR_ANY)) {
2215 hci_bdaddr_list_clear(list);
2216 return 0;
2217 }
2218
2219 entry = hci_bdaddr_list_lookup(list, bdaddr, type);
2220 if (!entry)
2221 return -ENOENT;
2222
2223 list_del(&entry->list);
2224 kfree(entry);
2225
2226 return 0;
2227}
2228
2229int hci_bdaddr_list_del_with_irk(struct list_head *list, bdaddr_t *bdaddr,
2230 u8 type)
2231{
2232 struct bdaddr_list_with_irk *entry;
2233
2234 if (!bacmp(bdaddr, BDADDR_ANY)) {
2235 hci_bdaddr_list_clear(list);
2236 return 0;
2237 }
2238
2239 entry = hci_bdaddr_list_lookup_with_irk(list, bdaddr, type);
2240 if (!entry)
2241 return -ENOENT;
2242
2243 list_del(&entry->list);
2244 kfree(entry);
2245
2246 return 0;
2247}
2248
2249int hci_bdaddr_list_del_with_flags(struct list_head *list, bdaddr_t *bdaddr,
2250 u8 type)
2251{
2252 struct bdaddr_list_with_flags *entry;
2253
2254 if (!bacmp(bdaddr, BDADDR_ANY)) {
2255 hci_bdaddr_list_clear(list);
2256 return 0;
2257 }
2258
2259 entry = hci_bdaddr_list_lookup_with_flags(list, bdaddr, type);
2260 if (!entry)
2261 return -ENOENT;
2262
2263 list_del(&entry->list);
2264 kfree(entry);
2265
2266 return 0;
2267}
2268
2269/* This function requires the caller holds hdev->lock */
2270struct hci_conn_params *hci_conn_params_lookup(struct hci_dev *hdev,
2271 bdaddr_t *addr, u8 addr_type)
2272{
2273 struct hci_conn_params *params;
2274
2275 list_for_each_entry(params, &hdev->le_conn_params, list) {
2276 if (bacmp(¶ms->addr, addr) == 0 &&
2277 params->addr_type == addr_type) {
2278 return params;
2279 }
2280 }
2281
2282 return NULL;
2283}
2284
2285/* This function requires the caller holds hdev->lock or rcu_read_lock */
2286struct hci_conn_params *hci_pend_le_action_lookup(struct list_head *list,
2287 bdaddr_t *addr, u8 addr_type)
2288{
2289 struct hci_conn_params *param;
2290
2291 rcu_read_lock();
2292
2293 list_for_each_entry_rcu(param, list, action) {
2294 if (bacmp(¶m->addr, addr) == 0 &&
2295 param->addr_type == addr_type) {
2296 rcu_read_unlock();
2297 return param;
2298 }
2299 }
2300
2301 rcu_read_unlock();
2302
2303 return NULL;
2304}
2305
2306/* This function requires the caller holds hdev->lock */
2307void hci_pend_le_list_del_init(struct hci_conn_params *param)
2308{
2309 if (list_empty(¶m->action))
2310 return;
2311
2312 list_del_rcu(¶m->action);
2313 synchronize_rcu();
2314 INIT_LIST_HEAD(¶m->action);
2315}
2316
2317/* This function requires the caller holds hdev->lock */
2318void hci_pend_le_list_add(struct hci_conn_params *param,
2319 struct list_head *list)
2320{
2321 list_add_rcu(¶m->action, list);
2322}
2323
2324/* This function requires the caller holds hdev->lock */
2325struct hci_conn_params *hci_conn_params_add(struct hci_dev *hdev,
2326 bdaddr_t *addr, u8 addr_type)
2327{
2328 struct hci_conn_params *params;
2329
2330 params = hci_conn_params_lookup(hdev, addr, addr_type);
2331 if (params)
2332 return params;
2333
2334 params = kzalloc(sizeof(*params), GFP_KERNEL);
2335 if (!params) {
2336 bt_dev_err(hdev, "out of memory");
2337 return NULL;
2338 }
2339
2340 bacpy(¶ms->addr, addr);
2341 params->addr_type = addr_type;
2342
2343 list_add(¶ms->list, &hdev->le_conn_params);
2344 INIT_LIST_HEAD(¶ms->action);
2345
2346 params->conn_min_interval = hdev->le_conn_min_interval;
2347 params->conn_max_interval = hdev->le_conn_max_interval;
2348 params->conn_latency = hdev->le_conn_latency;
2349 params->supervision_timeout = hdev->le_supv_timeout;
2350 params->auto_connect = HCI_AUTO_CONN_DISABLED;
2351
2352 BT_DBG("addr %pMR (type %u)", addr, addr_type);
2353
2354 return params;
2355}
2356
2357void hci_conn_params_free(struct hci_conn_params *params)
2358{
2359 hci_pend_le_list_del_init(params);
2360
2361 if (params->conn) {
2362 hci_conn_drop(params->conn);
2363 hci_conn_put(params->conn);
2364 }
2365
2366 list_del(¶ms->list);
2367 kfree(params);
2368}
2369
2370/* This function requires the caller holds hdev->lock */
2371void hci_conn_params_del(struct hci_dev *hdev, bdaddr_t *addr, u8 addr_type)
2372{
2373 struct hci_conn_params *params;
2374
2375 params = hci_conn_params_lookup(hdev, addr, addr_type);
2376 if (!params)
2377 return;
2378
2379 hci_conn_params_free(params);
2380
2381 hci_update_passive_scan(hdev);
2382
2383 BT_DBG("addr %pMR (type %u)", addr, addr_type);
2384}
2385
2386/* This function requires the caller holds hdev->lock */
2387void hci_conn_params_clear_disabled(struct hci_dev *hdev)
2388{
2389 struct hci_conn_params *params, *tmp;
2390
2391 list_for_each_entry_safe(params, tmp, &hdev->le_conn_params, list) {
2392 if (params->auto_connect != HCI_AUTO_CONN_DISABLED)
2393 continue;
2394
2395 /* If trying to establish one time connection to disabled
2396 * device, leave the params, but mark them as just once.
2397 */
2398 if (params->explicit_connect) {
2399 params->auto_connect = HCI_AUTO_CONN_EXPLICIT;
2400 continue;
2401 }
2402
2403 hci_conn_params_free(params);
2404 }
2405
2406 BT_DBG("All LE disabled connection parameters were removed");
2407}
2408
2409/* This function requires the caller holds hdev->lock */
2410static void hci_conn_params_clear_all(struct hci_dev *hdev)
2411{
2412 struct hci_conn_params *params, *tmp;
2413
2414 list_for_each_entry_safe(params, tmp, &hdev->le_conn_params, list)
2415 hci_conn_params_free(params);
2416
2417 BT_DBG("All LE connection parameters were removed");
2418}
2419
2420/* Copy the Identity Address of the controller.
2421 *
2422 * If the controller has a public BD_ADDR, then by default use that one.
2423 * If this is a LE only controller without a public address, default to
2424 * the static random address.
2425 *
2426 * For debugging purposes it is possible to force controllers with a
2427 * public address to use the static random address instead.
2428 *
2429 * In case BR/EDR has been disabled on a dual-mode controller and
2430 * userspace has configured a static address, then that address
2431 * becomes the identity address instead of the public BR/EDR address.
2432 */
2433void hci_copy_identity_address(struct hci_dev *hdev, bdaddr_t *bdaddr,
2434 u8 *bdaddr_type)
2435{
2436 if (hci_dev_test_flag(hdev, HCI_FORCE_STATIC_ADDR) ||
2437 !bacmp(&hdev->bdaddr, BDADDR_ANY) ||
2438 (!hci_dev_test_flag(hdev, HCI_BREDR_ENABLED) &&
2439 bacmp(&hdev->static_addr, BDADDR_ANY))) {
2440 bacpy(bdaddr, &hdev->static_addr);
2441 *bdaddr_type = ADDR_LE_DEV_RANDOM;
2442 } else {
2443 bacpy(bdaddr, &hdev->bdaddr);
2444 *bdaddr_type = ADDR_LE_DEV_PUBLIC;
2445 }
2446}
2447
2448static void hci_clear_wake_reason(struct hci_dev *hdev)
2449{
2450 hci_dev_lock(hdev);
2451
2452 hdev->wake_reason = 0;
2453 bacpy(&hdev->wake_addr, BDADDR_ANY);
2454 hdev->wake_addr_type = 0;
2455
2456 hci_dev_unlock(hdev);
2457}
2458
2459static int hci_suspend_notifier(struct notifier_block *nb, unsigned long action,
2460 void *data)
2461{
2462 struct hci_dev *hdev =
2463 container_of(nb, struct hci_dev, suspend_notifier);
2464 int ret = 0;
2465
2466 /* Userspace has full control of this device. Do nothing. */
2467 if (hci_dev_test_flag(hdev, HCI_USER_CHANNEL))
2468 return NOTIFY_DONE;
2469
2470 /* To avoid a potential race with hci_unregister_dev. */
2471 hci_dev_hold(hdev);
2472
2473 if (action == PM_SUSPEND_PREPARE)
2474 ret = hci_suspend_dev(hdev);
2475 else if (action == PM_POST_SUSPEND)
2476 ret = hci_resume_dev(hdev);
2477
2478 if (ret)
2479 bt_dev_err(hdev, "Suspend notifier action (%lu) failed: %d",
2480 action, ret);
2481
2482 hci_dev_put(hdev);
2483 return NOTIFY_DONE;
2484}
2485
2486/* Alloc HCI device */
2487struct hci_dev *hci_alloc_dev_priv(int sizeof_priv)
2488{
2489 struct hci_dev *hdev;
2490 unsigned int alloc_size;
2491
2492 alloc_size = sizeof(*hdev);
2493 if (sizeof_priv) {
2494 /* Fixme: May need ALIGN-ment? */
2495 alloc_size += sizeof_priv;
2496 }
2497
2498 hdev = kzalloc(alloc_size, GFP_KERNEL);
2499 if (!hdev)
2500 return NULL;
2501
2502 hdev->pkt_type = (HCI_DM1 | HCI_DH1 | HCI_HV1);
2503 hdev->esco_type = (ESCO_HV1);
2504 hdev->link_mode = (HCI_LM_ACCEPT);
2505 hdev->num_iac = 0x01; /* One IAC support is mandatory */
2506 hdev->io_capability = 0x03; /* No Input No Output */
2507 hdev->manufacturer = 0xffff; /* Default to internal use */
2508 hdev->inq_tx_power = HCI_TX_POWER_INVALID;
2509 hdev->adv_tx_power = HCI_TX_POWER_INVALID;
2510 hdev->adv_instance_cnt = 0;
2511 hdev->cur_adv_instance = 0x00;
2512 hdev->adv_instance_timeout = 0;
2513
2514 hdev->advmon_allowlist_duration = 300;
2515 hdev->advmon_no_filter_duration = 500;
2516 hdev->enable_advmon_interleave_scan = 0x00; /* Default to disable */
2517
2518 hdev->sniff_max_interval = 800;
2519 hdev->sniff_min_interval = 80;
2520
2521 hdev->le_adv_channel_map = 0x07;
2522 hdev->le_adv_min_interval = 0x0800;
2523 hdev->le_adv_max_interval = 0x0800;
2524 hdev->le_scan_interval = 0x0060;
2525 hdev->le_scan_window = 0x0030;
2526 hdev->le_scan_int_suspend = 0x0400;
2527 hdev->le_scan_window_suspend = 0x0012;
2528 hdev->le_scan_int_discovery = DISCOV_LE_SCAN_INT;
2529 hdev->le_scan_window_discovery = DISCOV_LE_SCAN_WIN;
2530 hdev->le_scan_int_adv_monitor = 0x0060;
2531 hdev->le_scan_window_adv_monitor = 0x0030;
2532 hdev->le_scan_int_connect = 0x0060;
2533 hdev->le_scan_window_connect = 0x0060;
2534 hdev->le_conn_min_interval = 0x0018;
2535 hdev->le_conn_max_interval = 0x0028;
2536 hdev->le_conn_latency = 0x0000;
2537 hdev->le_supv_timeout = 0x002a;
2538 hdev->le_def_tx_len = 0x001b;
2539 hdev->le_def_tx_time = 0x0148;
2540 hdev->le_max_tx_len = 0x001b;
2541 hdev->le_max_tx_time = 0x0148;
2542 hdev->le_max_rx_len = 0x001b;
2543 hdev->le_max_rx_time = 0x0148;
2544 hdev->le_max_key_size = SMP_MAX_ENC_KEY_SIZE;
2545 hdev->le_min_key_size = SMP_MIN_ENC_KEY_SIZE;
2546 hdev->le_tx_def_phys = HCI_LE_SET_PHY_1M;
2547 hdev->le_rx_def_phys = HCI_LE_SET_PHY_1M;
2548 hdev->le_num_of_adv_sets = HCI_MAX_ADV_INSTANCES;
2549 hdev->def_multi_adv_rotation_duration = HCI_DEFAULT_ADV_DURATION;
2550 hdev->def_le_autoconnect_timeout = HCI_LE_AUTOCONN_TIMEOUT;
2551 hdev->min_le_tx_power = HCI_TX_POWER_INVALID;
2552 hdev->max_le_tx_power = HCI_TX_POWER_INVALID;
2553
2554 hdev->rpa_timeout = HCI_DEFAULT_RPA_TIMEOUT;
2555 hdev->discov_interleaved_timeout = DISCOV_INTERLEAVED_TIMEOUT;
2556 hdev->conn_info_min_age = DEFAULT_CONN_INFO_MIN_AGE;
2557 hdev->conn_info_max_age = DEFAULT_CONN_INFO_MAX_AGE;
2558 hdev->auth_payload_timeout = DEFAULT_AUTH_PAYLOAD_TIMEOUT;
2559 hdev->min_enc_key_size = HCI_MIN_ENC_KEY_SIZE;
2560
2561 /* default 1.28 sec page scan */
2562 hdev->def_page_scan_type = PAGE_SCAN_TYPE_STANDARD;
2563 hdev->def_page_scan_int = 0x0800;
2564 hdev->def_page_scan_window = 0x0012;
2565
2566 mutex_init(&hdev->lock);
2567 mutex_init(&hdev->req_lock);
2568
2569 ida_init(&hdev->unset_handle_ida);
2570
2571 INIT_LIST_HEAD(&hdev->mesh_pending);
2572 INIT_LIST_HEAD(&hdev->mgmt_pending);
2573 INIT_LIST_HEAD(&hdev->reject_list);
2574 INIT_LIST_HEAD(&hdev->accept_list);
2575 INIT_LIST_HEAD(&hdev->uuids);
2576 INIT_LIST_HEAD(&hdev->link_keys);
2577 INIT_LIST_HEAD(&hdev->long_term_keys);
2578 INIT_LIST_HEAD(&hdev->identity_resolving_keys);
2579 INIT_LIST_HEAD(&hdev->remote_oob_data);
2580 INIT_LIST_HEAD(&hdev->le_accept_list);
2581 INIT_LIST_HEAD(&hdev->le_resolv_list);
2582 INIT_LIST_HEAD(&hdev->le_conn_params);
2583 INIT_LIST_HEAD(&hdev->pend_le_conns);
2584 INIT_LIST_HEAD(&hdev->pend_le_reports);
2585 INIT_LIST_HEAD(&hdev->conn_hash.list);
2586 INIT_LIST_HEAD(&hdev->adv_instances);
2587 INIT_LIST_HEAD(&hdev->blocked_keys);
2588 INIT_LIST_HEAD(&hdev->monitored_devices);
2589
2590 INIT_LIST_HEAD(&hdev->local_codecs);
2591 INIT_WORK(&hdev->rx_work, hci_rx_work);
2592 INIT_WORK(&hdev->cmd_work, hci_cmd_work);
2593 INIT_WORK(&hdev->tx_work, hci_tx_work);
2594 INIT_WORK(&hdev->power_on, hci_power_on);
2595 INIT_WORK(&hdev->error_reset, hci_error_reset);
2596
2597 hci_cmd_sync_init(hdev);
2598
2599 INIT_DELAYED_WORK(&hdev->power_off, hci_power_off);
2600
2601 skb_queue_head_init(&hdev->rx_q);
2602 skb_queue_head_init(&hdev->cmd_q);
2603 skb_queue_head_init(&hdev->raw_q);
2604
2605 init_waitqueue_head(&hdev->req_wait_q);
2606
2607 INIT_DELAYED_WORK(&hdev->cmd_timer, hci_cmd_timeout);
2608 INIT_DELAYED_WORK(&hdev->ncmd_timer, hci_ncmd_timeout);
2609
2610 hci_devcd_setup(hdev);
2611 hci_request_setup(hdev);
2612
2613 hci_init_sysfs(hdev);
2614 discovery_init(hdev);
2615
2616 return hdev;
2617}
2618EXPORT_SYMBOL(hci_alloc_dev_priv);
2619
2620/* Free HCI device */
2621void hci_free_dev(struct hci_dev *hdev)
2622{
2623 /* will free via device release */
2624 put_device(&hdev->dev);
2625}
2626EXPORT_SYMBOL(hci_free_dev);
2627
2628/* Register HCI device */
2629int hci_register_dev(struct hci_dev *hdev)
2630{
2631 int id, error;
2632
2633 if (!hdev->open || !hdev->close || !hdev->send)
2634 return -EINVAL;
2635
2636 id = ida_alloc_max(&hci_index_ida, HCI_MAX_ID - 1, GFP_KERNEL);
2637 if (id < 0)
2638 return id;
2639
2640 error = dev_set_name(&hdev->dev, "hci%u", id);
2641 if (error)
2642 return error;
2643
2644 hdev->name = dev_name(&hdev->dev);
2645 hdev->id = id;
2646
2647 BT_DBG("%p name %s bus %d", hdev, hdev->name, hdev->bus);
2648
2649 hdev->workqueue = alloc_ordered_workqueue("%s", WQ_HIGHPRI, hdev->name);
2650 if (!hdev->workqueue) {
2651 error = -ENOMEM;
2652 goto err;
2653 }
2654
2655 hdev->req_workqueue = alloc_ordered_workqueue("%s", WQ_HIGHPRI,
2656 hdev->name);
2657 if (!hdev->req_workqueue) {
2658 destroy_workqueue(hdev->workqueue);
2659 error = -ENOMEM;
2660 goto err;
2661 }
2662
2663 if (!IS_ERR_OR_NULL(bt_debugfs))
2664 hdev->debugfs = debugfs_create_dir(hdev->name, bt_debugfs);
2665
2666 error = device_add(&hdev->dev);
2667 if (error < 0)
2668 goto err_wqueue;
2669
2670 hci_leds_init(hdev);
2671
2672 hdev->rfkill = rfkill_alloc(hdev->name, &hdev->dev,
2673 RFKILL_TYPE_BLUETOOTH, &hci_rfkill_ops,
2674 hdev);
2675 if (hdev->rfkill) {
2676 if (rfkill_register(hdev->rfkill) < 0) {
2677 rfkill_destroy(hdev->rfkill);
2678 hdev->rfkill = NULL;
2679 }
2680 }
2681
2682 if (hdev->rfkill && rfkill_blocked(hdev->rfkill))
2683 hci_dev_set_flag(hdev, HCI_RFKILLED);
2684
2685 hci_dev_set_flag(hdev, HCI_SETUP);
2686 hci_dev_set_flag(hdev, HCI_AUTO_OFF);
2687
2688 /* Assume BR/EDR support until proven otherwise (such as
2689 * through reading supported features during init.
2690 */
2691 hci_dev_set_flag(hdev, HCI_BREDR_ENABLED);
2692
2693 write_lock(&hci_dev_list_lock);
2694 list_add(&hdev->list, &hci_dev_list);
2695 write_unlock(&hci_dev_list_lock);
2696
2697 /* Devices that are marked for raw-only usage are unconfigured
2698 * and should not be included in normal operation.
2699 */
2700 if (test_bit(HCI_QUIRK_RAW_DEVICE, &hdev->quirks))
2701 hci_dev_set_flag(hdev, HCI_UNCONFIGURED);
2702
2703 /* Mark Remote Wakeup connection flag as supported if driver has wakeup
2704 * callback.
2705 */
2706 if (hdev->wakeup)
2707 hdev->conn_flags |= HCI_CONN_FLAG_REMOTE_WAKEUP;
2708
2709 hci_sock_dev_event(hdev, HCI_DEV_REG);
2710 hci_dev_hold(hdev);
2711
2712 error = hci_register_suspend_notifier(hdev);
2713 if (error)
2714 BT_WARN("register suspend notifier failed error:%d\n", error);
2715
2716 queue_work(hdev->req_workqueue, &hdev->power_on);
2717
2718 idr_init(&hdev->adv_monitors_idr);
2719 msft_register(hdev);
2720
2721 return id;
2722
2723err_wqueue:
2724 debugfs_remove_recursive(hdev->debugfs);
2725 destroy_workqueue(hdev->workqueue);
2726 destroy_workqueue(hdev->req_workqueue);
2727err:
2728 ida_free(&hci_index_ida, hdev->id);
2729
2730 return error;
2731}
2732EXPORT_SYMBOL(hci_register_dev);
2733
2734/* Unregister HCI device */
2735void hci_unregister_dev(struct hci_dev *hdev)
2736{
2737 BT_DBG("%p name %s bus %d", hdev, hdev->name, hdev->bus);
2738
2739 mutex_lock(&hdev->unregister_lock);
2740 hci_dev_set_flag(hdev, HCI_UNREGISTER);
2741 mutex_unlock(&hdev->unregister_lock);
2742
2743 write_lock(&hci_dev_list_lock);
2744 list_del(&hdev->list);
2745 write_unlock(&hci_dev_list_lock);
2746
2747 cancel_work_sync(&hdev->power_on);
2748
2749 hci_cmd_sync_clear(hdev);
2750
2751 hci_unregister_suspend_notifier(hdev);
2752
2753 hci_dev_do_close(hdev);
2754
2755 if (!test_bit(HCI_INIT, &hdev->flags) &&
2756 !hci_dev_test_flag(hdev, HCI_SETUP) &&
2757 !hci_dev_test_flag(hdev, HCI_CONFIG)) {
2758 hci_dev_lock(hdev);
2759 mgmt_index_removed(hdev);
2760 hci_dev_unlock(hdev);
2761 }
2762
2763 /* mgmt_index_removed should take care of emptying the
2764 * pending list */
2765 BUG_ON(!list_empty(&hdev->mgmt_pending));
2766
2767 hci_sock_dev_event(hdev, HCI_DEV_UNREG);
2768
2769 if (hdev->rfkill) {
2770 rfkill_unregister(hdev->rfkill);
2771 rfkill_destroy(hdev->rfkill);
2772 }
2773
2774 device_del(&hdev->dev);
2775 /* Actual cleanup is deferred until hci_release_dev(). */
2776 hci_dev_put(hdev);
2777}
2778EXPORT_SYMBOL(hci_unregister_dev);
2779
2780/* Release HCI device */
2781void hci_release_dev(struct hci_dev *hdev)
2782{
2783 debugfs_remove_recursive(hdev->debugfs);
2784 kfree_const(hdev->hw_info);
2785 kfree_const(hdev->fw_info);
2786
2787 destroy_workqueue(hdev->workqueue);
2788 destroy_workqueue(hdev->req_workqueue);
2789
2790 hci_dev_lock(hdev);
2791 hci_bdaddr_list_clear(&hdev->reject_list);
2792 hci_bdaddr_list_clear(&hdev->accept_list);
2793 hci_uuids_clear(hdev);
2794 hci_link_keys_clear(hdev);
2795 hci_smp_ltks_clear(hdev);
2796 hci_smp_irks_clear(hdev);
2797 hci_remote_oob_data_clear(hdev);
2798 hci_adv_instances_clear(hdev);
2799 hci_adv_monitors_clear(hdev);
2800 hci_bdaddr_list_clear(&hdev->le_accept_list);
2801 hci_bdaddr_list_clear(&hdev->le_resolv_list);
2802 hci_conn_params_clear_all(hdev);
2803 hci_discovery_filter_clear(hdev);
2804 hci_blocked_keys_clear(hdev);
2805 hci_codec_list_clear(&hdev->local_codecs);
2806 msft_release(hdev);
2807 hci_dev_unlock(hdev);
2808
2809 ida_destroy(&hdev->unset_handle_ida);
2810 ida_free(&hci_index_ida, hdev->id);
2811 kfree_skb(hdev->sent_cmd);
2812 kfree_skb(hdev->req_skb);
2813 kfree_skb(hdev->recv_event);
2814 kfree(hdev);
2815}
2816EXPORT_SYMBOL(hci_release_dev);
2817
2818int hci_register_suspend_notifier(struct hci_dev *hdev)
2819{
2820 int ret = 0;
2821
2822 if (!hdev->suspend_notifier.notifier_call &&
2823 !test_bit(HCI_QUIRK_NO_SUSPEND_NOTIFIER, &hdev->quirks)) {
2824 hdev->suspend_notifier.notifier_call = hci_suspend_notifier;
2825 ret = register_pm_notifier(&hdev->suspend_notifier);
2826 }
2827
2828 return ret;
2829}
2830
2831int hci_unregister_suspend_notifier(struct hci_dev *hdev)
2832{
2833 int ret = 0;
2834
2835 if (hdev->suspend_notifier.notifier_call) {
2836 ret = unregister_pm_notifier(&hdev->suspend_notifier);
2837 if (!ret)
2838 hdev->suspend_notifier.notifier_call = NULL;
2839 }
2840
2841 return ret;
2842}
2843
2844/* Cancel ongoing command synchronously:
2845 *
2846 * - Cancel command timer
2847 * - Reset command counter
2848 * - Cancel command request
2849 */
2850static void hci_cancel_cmd_sync(struct hci_dev *hdev, int err)
2851{
2852 bt_dev_dbg(hdev, "err 0x%2.2x", err);
2853
2854 cancel_delayed_work_sync(&hdev->cmd_timer);
2855 cancel_delayed_work_sync(&hdev->ncmd_timer);
2856 atomic_set(&hdev->cmd_cnt, 1);
2857
2858 hci_cmd_sync_cancel_sync(hdev, err);
2859}
2860
2861/* Suspend HCI device */
2862int hci_suspend_dev(struct hci_dev *hdev)
2863{
2864 int ret;
2865
2866 bt_dev_dbg(hdev, "");
2867
2868 /* Suspend should only act on when powered. */
2869 if (!hdev_is_powered(hdev) ||
2870 hci_dev_test_flag(hdev, HCI_UNREGISTER))
2871 return 0;
2872
2873 /* If powering down don't attempt to suspend */
2874 if (mgmt_powering_down(hdev))
2875 return 0;
2876
2877 /* Cancel potentially blocking sync operation before suspend */
2878 hci_cancel_cmd_sync(hdev, EHOSTDOWN);
2879
2880 hci_req_sync_lock(hdev);
2881 ret = hci_suspend_sync(hdev);
2882 hci_req_sync_unlock(hdev);
2883
2884 hci_clear_wake_reason(hdev);
2885 mgmt_suspending(hdev, hdev->suspend_state);
2886
2887 hci_sock_dev_event(hdev, HCI_DEV_SUSPEND);
2888 return ret;
2889}
2890EXPORT_SYMBOL(hci_suspend_dev);
2891
2892/* Resume HCI device */
2893int hci_resume_dev(struct hci_dev *hdev)
2894{
2895 int ret;
2896
2897 bt_dev_dbg(hdev, "");
2898
2899 /* Resume should only act on when powered. */
2900 if (!hdev_is_powered(hdev) ||
2901 hci_dev_test_flag(hdev, HCI_UNREGISTER))
2902 return 0;
2903
2904 /* If powering down don't attempt to resume */
2905 if (mgmt_powering_down(hdev))
2906 return 0;
2907
2908 hci_req_sync_lock(hdev);
2909 ret = hci_resume_sync(hdev);
2910 hci_req_sync_unlock(hdev);
2911
2912 mgmt_resuming(hdev, hdev->wake_reason, &hdev->wake_addr,
2913 hdev->wake_addr_type);
2914
2915 hci_sock_dev_event(hdev, HCI_DEV_RESUME);
2916 return ret;
2917}
2918EXPORT_SYMBOL(hci_resume_dev);
2919
2920/* Reset HCI device */
2921int hci_reset_dev(struct hci_dev *hdev)
2922{
2923 static const u8 hw_err[] = { HCI_EV_HARDWARE_ERROR, 0x01, 0x00 };
2924 struct sk_buff *skb;
2925
2926 skb = bt_skb_alloc(3, GFP_ATOMIC);
2927 if (!skb)
2928 return -ENOMEM;
2929
2930 hci_skb_pkt_type(skb) = HCI_EVENT_PKT;
2931 skb_put_data(skb, hw_err, 3);
2932
2933 bt_dev_err(hdev, "Injecting HCI hardware error event");
2934
2935 /* Send Hardware Error to upper stack */
2936 return hci_recv_frame(hdev, skb);
2937}
2938EXPORT_SYMBOL(hci_reset_dev);
2939
2940/* Receive frame from HCI drivers */
2941int hci_recv_frame(struct hci_dev *hdev, struct sk_buff *skb)
2942{
2943 if (!hdev || (!test_bit(HCI_UP, &hdev->flags)
2944 && !test_bit(HCI_INIT, &hdev->flags))) {
2945 kfree_skb(skb);
2946 return -ENXIO;
2947 }
2948
2949 switch (hci_skb_pkt_type(skb)) {
2950 case HCI_EVENT_PKT:
2951 break;
2952 case HCI_ACLDATA_PKT:
2953 /* Detect if ISO packet has been sent as ACL */
2954 if (hci_conn_num(hdev, ISO_LINK)) {
2955 __u16 handle = __le16_to_cpu(hci_acl_hdr(skb)->handle);
2956 __u8 type;
2957
2958 type = hci_conn_lookup_type(hdev, hci_handle(handle));
2959 if (type == ISO_LINK)
2960 hci_skb_pkt_type(skb) = HCI_ISODATA_PKT;
2961 }
2962 break;
2963 case HCI_SCODATA_PKT:
2964 break;
2965 case HCI_ISODATA_PKT:
2966 break;
2967 default:
2968 kfree_skb(skb);
2969 return -EINVAL;
2970 }
2971
2972 /* Incoming skb */
2973 bt_cb(skb)->incoming = 1;
2974
2975 /* Time stamp */
2976 __net_timestamp(skb);
2977
2978 skb_queue_tail(&hdev->rx_q, skb);
2979 queue_work(hdev->workqueue, &hdev->rx_work);
2980
2981 return 0;
2982}
2983EXPORT_SYMBOL(hci_recv_frame);
2984
2985/* Receive diagnostic message from HCI drivers */
2986int hci_recv_diag(struct hci_dev *hdev, struct sk_buff *skb)
2987{
2988 /* Mark as diagnostic packet */
2989 hci_skb_pkt_type(skb) = HCI_DIAG_PKT;
2990
2991 /* Time stamp */
2992 __net_timestamp(skb);
2993
2994 skb_queue_tail(&hdev->rx_q, skb);
2995 queue_work(hdev->workqueue, &hdev->rx_work);
2996
2997 return 0;
2998}
2999EXPORT_SYMBOL(hci_recv_diag);
3000
3001void hci_set_hw_info(struct hci_dev *hdev, const char *fmt, ...)
3002{
3003 va_list vargs;
3004
3005 va_start(vargs, fmt);
3006 kfree_const(hdev->hw_info);
3007 hdev->hw_info = kvasprintf_const(GFP_KERNEL, fmt, vargs);
3008 va_end(vargs);
3009}
3010EXPORT_SYMBOL(hci_set_hw_info);
3011
3012void hci_set_fw_info(struct hci_dev *hdev, const char *fmt, ...)
3013{
3014 va_list vargs;
3015
3016 va_start(vargs, fmt);
3017 kfree_const(hdev->fw_info);
3018 hdev->fw_info = kvasprintf_const(GFP_KERNEL, fmt, vargs);
3019 va_end(vargs);
3020}
3021EXPORT_SYMBOL(hci_set_fw_info);
3022
3023/* ---- Interface to upper protocols ---- */
3024
3025int hci_register_cb(struct hci_cb *cb)
3026{
3027 BT_DBG("%p name %s", cb, cb->name);
3028
3029 mutex_lock(&hci_cb_list_lock);
3030 list_add_tail(&cb->list, &hci_cb_list);
3031 mutex_unlock(&hci_cb_list_lock);
3032
3033 return 0;
3034}
3035EXPORT_SYMBOL(hci_register_cb);
3036
3037int hci_unregister_cb(struct hci_cb *cb)
3038{
3039 BT_DBG("%p name %s", cb, cb->name);
3040
3041 mutex_lock(&hci_cb_list_lock);
3042 list_del(&cb->list);
3043 mutex_unlock(&hci_cb_list_lock);
3044
3045 return 0;
3046}
3047EXPORT_SYMBOL(hci_unregister_cb);
3048
3049static int hci_send_frame(struct hci_dev *hdev, struct sk_buff *skb)
3050{
3051 int err;
3052
3053 BT_DBG("%s type %d len %d", hdev->name, hci_skb_pkt_type(skb),
3054 skb->len);
3055
3056 /* Time stamp */
3057 __net_timestamp(skb);
3058
3059 /* Send copy to monitor */
3060 hci_send_to_monitor(hdev, skb);
3061
3062 if (atomic_read(&hdev->promisc)) {
3063 /* Send copy to the sockets */
3064 hci_send_to_sock(hdev, skb);
3065 }
3066
3067 /* Get rid of skb owner, prior to sending to the driver. */
3068 skb_orphan(skb);
3069
3070 if (!test_bit(HCI_RUNNING, &hdev->flags)) {
3071 kfree_skb(skb);
3072 return -EINVAL;
3073 }
3074
3075 err = hdev->send(hdev, skb);
3076 if (err < 0) {
3077 bt_dev_err(hdev, "sending frame failed (%d)", err);
3078 kfree_skb(skb);
3079 return err;
3080 }
3081
3082 return 0;
3083}
3084
3085/* Send HCI command */
3086int hci_send_cmd(struct hci_dev *hdev, __u16 opcode, __u32 plen,
3087 const void *param)
3088{
3089 struct sk_buff *skb;
3090
3091 BT_DBG("%s opcode 0x%4.4x plen %d", hdev->name, opcode, plen);
3092
3093 skb = hci_prepare_cmd(hdev, opcode, plen, param);
3094 if (!skb) {
3095 bt_dev_err(hdev, "no memory for command");
3096 return -ENOMEM;
3097 }
3098
3099 /* Stand-alone HCI commands must be flagged as
3100 * single-command requests.
3101 */
3102 bt_cb(skb)->hci.req_flags |= HCI_REQ_START;
3103
3104 skb_queue_tail(&hdev->cmd_q, skb);
3105 queue_work(hdev->workqueue, &hdev->cmd_work);
3106
3107 return 0;
3108}
3109
3110int __hci_cmd_send(struct hci_dev *hdev, u16 opcode, u32 plen,
3111 const void *param)
3112{
3113 struct sk_buff *skb;
3114
3115 if (hci_opcode_ogf(opcode) != 0x3f) {
3116 /* A controller receiving a command shall respond with either
3117 * a Command Status Event or a Command Complete Event.
3118 * Therefore, all standard HCI commands must be sent via the
3119 * standard API, using hci_send_cmd or hci_cmd_sync helpers.
3120 * Some vendors do not comply with this rule for vendor-specific
3121 * commands and do not return any event. We want to support
3122 * unresponded commands for such cases only.
3123 */
3124 bt_dev_err(hdev, "unresponded command not supported");
3125 return -EINVAL;
3126 }
3127
3128 skb = hci_prepare_cmd(hdev, opcode, plen, param);
3129 if (!skb) {
3130 bt_dev_err(hdev, "no memory for command (opcode 0x%4.4x)",
3131 opcode);
3132 return -ENOMEM;
3133 }
3134
3135 hci_send_frame(hdev, skb);
3136
3137 return 0;
3138}
3139EXPORT_SYMBOL(__hci_cmd_send);
3140
3141/* Get data from the previously sent command */
3142static void *hci_cmd_data(struct sk_buff *skb, __u16 opcode)
3143{
3144 struct hci_command_hdr *hdr;
3145
3146 if (!skb || skb->len < HCI_COMMAND_HDR_SIZE)
3147 return NULL;
3148
3149 hdr = (void *)skb->data;
3150
3151 if (hdr->opcode != cpu_to_le16(opcode))
3152 return NULL;
3153
3154 return skb->data + HCI_COMMAND_HDR_SIZE;
3155}
3156
3157/* Get data from the previously sent command */
3158void *hci_sent_cmd_data(struct hci_dev *hdev, __u16 opcode)
3159{
3160 void *data;
3161
3162 /* Check if opcode matches last sent command */
3163 data = hci_cmd_data(hdev->sent_cmd, opcode);
3164 if (!data)
3165 /* Check if opcode matches last request */
3166 data = hci_cmd_data(hdev->req_skb, opcode);
3167
3168 return data;
3169}
3170
3171/* Get data from last received event */
3172void *hci_recv_event_data(struct hci_dev *hdev, __u8 event)
3173{
3174 struct hci_event_hdr *hdr;
3175 int offset;
3176
3177 if (!hdev->recv_event)
3178 return NULL;
3179
3180 hdr = (void *)hdev->recv_event->data;
3181 offset = sizeof(*hdr);
3182
3183 if (hdr->evt != event) {
3184 /* In case of LE metaevent check the subevent match */
3185 if (hdr->evt == HCI_EV_LE_META) {
3186 struct hci_ev_le_meta *ev;
3187
3188 ev = (void *)hdev->recv_event->data + offset;
3189 offset += sizeof(*ev);
3190 if (ev->subevent == event)
3191 goto found;
3192 }
3193 return NULL;
3194 }
3195
3196found:
3197 bt_dev_dbg(hdev, "event 0x%2.2x", event);
3198
3199 return hdev->recv_event->data + offset;
3200}
3201
3202/* Send ACL data */
3203static void hci_add_acl_hdr(struct sk_buff *skb, __u16 handle, __u16 flags)
3204{
3205 struct hci_acl_hdr *hdr;
3206 int len = skb->len;
3207
3208 skb_push(skb, HCI_ACL_HDR_SIZE);
3209 skb_reset_transport_header(skb);
3210 hdr = (struct hci_acl_hdr *)skb_transport_header(skb);
3211 hdr->handle = cpu_to_le16(hci_handle_pack(handle, flags));
3212 hdr->dlen = cpu_to_le16(len);
3213}
3214
3215static void hci_queue_acl(struct hci_chan *chan, struct sk_buff_head *queue,
3216 struct sk_buff *skb, __u16 flags)
3217{
3218 struct hci_conn *conn = chan->conn;
3219 struct hci_dev *hdev = conn->hdev;
3220 struct sk_buff *list;
3221
3222 skb->len = skb_headlen(skb);
3223 skb->data_len = 0;
3224
3225 hci_skb_pkt_type(skb) = HCI_ACLDATA_PKT;
3226
3227 hci_add_acl_hdr(skb, conn->handle, flags);
3228
3229 list = skb_shinfo(skb)->frag_list;
3230 if (!list) {
3231 /* Non fragmented */
3232 BT_DBG("%s nonfrag skb %p len %d", hdev->name, skb, skb->len);
3233
3234 skb_queue_tail(queue, skb);
3235 } else {
3236 /* Fragmented */
3237 BT_DBG("%s frag %p len %d", hdev->name, skb, skb->len);
3238
3239 skb_shinfo(skb)->frag_list = NULL;
3240
3241 /* Queue all fragments atomically. We need to use spin_lock_bh
3242 * here because of 6LoWPAN links, as there this function is
3243 * called from softirq and using normal spin lock could cause
3244 * deadlocks.
3245 */
3246 spin_lock_bh(&queue->lock);
3247
3248 __skb_queue_tail(queue, skb);
3249
3250 flags &= ~ACL_START;
3251 flags |= ACL_CONT;
3252 do {
3253 skb = list; list = list->next;
3254
3255 hci_skb_pkt_type(skb) = HCI_ACLDATA_PKT;
3256 hci_add_acl_hdr(skb, conn->handle, flags);
3257
3258 BT_DBG("%s frag %p len %d", hdev->name, skb, skb->len);
3259
3260 __skb_queue_tail(queue, skb);
3261 } while (list);
3262
3263 spin_unlock_bh(&queue->lock);
3264 }
3265}
3266
3267void hci_send_acl(struct hci_chan *chan, struct sk_buff *skb, __u16 flags)
3268{
3269 struct hci_dev *hdev = chan->conn->hdev;
3270
3271 BT_DBG("%s chan %p flags 0x%4.4x", hdev->name, chan, flags);
3272
3273 hci_queue_acl(chan, &chan->data_q, skb, flags);
3274
3275 queue_work(hdev->workqueue, &hdev->tx_work);
3276}
3277
3278/* Send SCO data */
3279void hci_send_sco(struct hci_conn *conn, struct sk_buff *skb)
3280{
3281 struct hci_dev *hdev = conn->hdev;
3282 struct hci_sco_hdr hdr;
3283
3284 BT_DBG("%s len %d", hdev->name, skb->len);
3285
3286 hdr.handle = cpu_to_le16(conn->handle);
3287 hdr.dlen = skb->len;
3288
3289 skb_push(skb, HCI_SCO_HDR_SIZE);
3290 skb_reset_transport_header(skb);
3291 memcpy(skb_transport_header(skb), &hdr, HCI_SCO_HDR_SIZE);
3292
3293 hci_skb_pkt_type(skb) = HCI_SCODATA_PKT;
3294
3295 skb_queue_tail(&conn->data_q, skb);
3296 queue_work(hdev->workqueue, &hdev->tx_work);
3297}
3298
3299/* Send ISO data */
3300static void hci_add_iso_hdr(struct sk_buff *skb, __u16 handle, __u8 flags)
3301{
3302 struct hci_iso_hdr *hdr;
3303 int len = skb->len;
3304
3305 skb_push(skb, HCI_ISO_HDR_SIZE);
3306 skb_reset_transport_header(skb);
3307 hdr = (struct hci_iso_hdr *)skb_transport_header(skb);
3308 hdr->handle = cpu_to_le16(hci_handle_pack(handle, flags));
3309 hdr->dlen = cpu_to_le16(len);
3310}
3311
3312static void hci_queue_iso(struct hci_conn *conn, struct sk_buff_head *queue,
3313 struct sk_buff *skb)
3314{
3315 struct hci_dev *hdev = conn->hdev;
3316 struct sk_buff *list;
3317 __u16 flags;
3318
3319 skb->len = skb_headlen(skb);
3320 skb->data_len = 0;
3321
3322 hci_skb_pkt_type(skb) = HCI_ISODATA_PKT;
3323
3324 list = skb_shinfo(skb)->frag_list;
3325
3326 flags = hci_iso_flags_pack(list ? ISO_START : ISO_SINGLE, 0x00);
3327 hci_add_iso_hdr(skb, conn->handle, flags);
3328
3329 if (!list) {
3330 /* Non fragmented */
3331 BT_DBG("%s nonfrag skb %p len %d", hdev->name, skb, skb->len);
3332
3333 skb_queue_tail(queue, skb);
3334 } else {
3335 /* Fragmented */
3336 BT_DBG("%s frag %p len %d", hdev->name, skb, skb->len);
3337
3338 skb_shinfo(skb)->frag_list = NULL;
3339
3340 __skb_queue_tail(queue, skb);
3341
3342 do {
3343 skb = list; list = list->next;
3344
3345 hci_skb_pkt_type(skb) = HCI_ISODATA_PKT;
3346 flags = hci_iso_flags_pack(list ? ISO_CONT : ISO_END,
3347 0x00);
3348 hci_add_iso_hdr(skb, conn->handle, flags);
3349
3350 BT_DBG("%s frag %p len %d", hdev->name, skb, skb->len);
3351
3352 __skb_queue_tail(queue, skb);
3353 } while (list);
3354 }
3355}
3356
3357void hci_send_iso(struct hci_conn *conn, struct sk_buff *skb)
3358{
3359 struct hci_dev *hdev = conn->hdev;
3360
3361 BT_DBG("%s len %d", hdev->name, skb->len);
3362
3363 hci_queue_iso(conn, &conn->data_q, skb);
3364
3365 queue_work(hdev->workqueue, &hdev->tx_work);
3366}
3367
3368/* ---- HCI TX task (outgoing data) ---- */
3369
3370/* HCI Connection scheduler */
3371static inline void hci_quote_sent(struct hci_conn *conn, int num, int *quote)
3372{
3373 struct hci_dev *hdev;
3374 int cnt, q;
3375
3376 if (!conn) {
3377 *quote = 0;
3378 return;
3379 }
3380
3381 hdev = conn->hdev;
3382
3383 switch (conn->type) {
3384 case ACL_LINK:
3385 cnt = hdev->acl_cnt;
3386 break;
3387 case SCO_LINK:
3388 case ESCO_LINK:
3389 cnt = hdev->sco_cnt;
3390 break;
3391 case LE_LINK:
3392 cnt = hdev->le_mtu ? hdev->le_cnt : hdev->acl_cnt;
3393 break;
3394 case ISO_LINK:
3395 cnt = hdev->iso_mtu ? hdev->iso_cnt :
3396 hdev->le_mtu ? hdev->le_cnt : hdev->acl_cnt;
3397 break;
3398 default:
3399 cnt = 0;
3400 bt_dev_err(hdev, "unknown link type %d", conn->type);
3401 }
3402
3403 q = cnt / num;
3404 *quote = q ? q : 1;
3405}
3406
3407static struct hci_conn *hci_low_sent(struct hci_dev *hdev, __u8 type,
3408 int *quote)
3409{
3410 struct hci_conn_hash *h = &hdev->conn_hash;
3411 struct hci_conn *conn = NULL, *c;
3412 unsigned int num = 0, min = ~0;
3413
3414 /* We don't have to lock device here. Connections are always
3415 * added and removed with TX task disabled. */
3416
3417 rcu_read_lock();
3418
3419 list_for_each_entry_rcu(c, &h->list, list) {
3420 if (c->type != type || skb_queue_empty(&c->data_q))
3421 continue;
3422
3423 if (c->state != BT_CONNECTED && c->state != BT_CONFIG)
3424 continue;
3425
3426 num++;
3427
3428 if (c->sent < min) {
3429 min = c->sent;
3430 conn = c;
3431 }
3432
3433 if (hci_conn_num(hdev, type) == num)
3434 break;
3435 }
3436
3437 rcu_read_unlock();
3438
3439 hci_quote_sent(conn, num, quote);
3440
3441 BT_DBG("conn %p quote %d", conn, *quote);
3442 return conn;
3443}
3444
3445static void hci_link_tx_to(struct hci_dev *hdev, __u8 type)
3446{
3447 struct hci_conn_hash *h = &hdev->conn_hash;
3448 struct hci_conn *c;
3449
3450 bt_dev_err(hdev, "link tx timeout");
3451
3452 rcu_read_lock();
3453
3454 /* Kill stalled connections */
3455 list_for_each_entry_rcu(c, &h->list, list) {
3456 if (c->type == type && c->sent) {
3457 bt_dev_err(hdev, "killing stalled connection %pMR",
3458 &c->dst);
3459 /* hci_disconnect might sleep, so, we have to release
3460 * the RCU read lock before calling it.
3461 */
3462 rcu_read_unlock();
3463 hci_disconnect(c, HCI_ERROR_REMOTE_USER_TERM);
3464 rcu_read_lock();
3465 }
3466 }
3467
3468 rcu_read_unlock();
3469}
3470
3471static struct hci_chan *hci_chan_sent(struct hci_dev *hdev, __u8 type,
3472 int *quote)
3473{
3474 struct hci_conn_hash *h = &hdev->conn_hash;
3475 struct hci_chan *chan = NULL;
3476 unsigned int num = 0, min = ~0, cur_prio = 0;
3477 struct hci_conn *conn;
3478 int conn_num = 0;
3479
3480 BT_DBG("%s", hdev->name);
3481
3482 rcu_read_lock();
3483
3484 list_for_each_entry_rcu(conn, &h->list, list) {
3485 struct hci_chan *tmp;
3486
3487 if (conn->type != type)
3488 continue;
3489
3490 if (conn->state != BT_CONNECTED && conn->state != BT_CONFIG)
3491 continue;
3492
3493 conn_num++;
3494
3495 list_for_each_entry_rcu(tmp, &conn->chan_list, list) {
3496 struct sk_buff *skb;
3497
3498 if (skb_queue_empty(&tmp->data_q))
3499 continue;
3500
3501 skb = skb_peek(&tmp->data_q);
3502 if (skb->priority < cur_prio)
3503 continue;
3504
3505 if (skb->priority > cur_prio) {
3506 num = 0;
3507 min = ~0;
3508 cur_prio = skb->priority;
3509 }
3510
3511 num++;
3512
3513 if (conn->sent < min) {
3514 min = conn->sent;
3515 chan = tmp;
3516 }
3517 }
3518
3519 if (hci_conn_num(hdev, type) == conn_num)
3520 break;
3521 }
3522
3523 rcu_read_unlock();
3524
3525 if (!chan)
3526 return NULL;
3527
3528 hci_quote_sent(chan->conn, num, quote);
3529
3530 BT_DBG("chan %p quote %d", chan, *quote);
3531 return chan;
3532}
3533
3534static void hci_prio_recalculate(struct hci_dev *hdev, __u8 type)
3535{
3536 struct hci_conn_hash *h = &hdev->conn_hash;
3537 struct hci_conn *conn;
3538 int num = 0;
3539
3540 BT_DBG("%s", hdev->name);
3541
3542 rcu_read_lock();
3543
3544 list_for_each_entry_rcu(conn, &h->list, list) {
3545 struct hci_chan *chan;
3546
3547 if (conn->type != type)
3548 continue;
3549
3550 if (conn->state != BT_CONNECTED && conn->state != BT_CONFIG)
3551 continue;
3552
3553 num++;
3554
3555 list_for_each_entry_rcu(chan, &conn->chan_list, list) {
3556 struct sk_buff *skb;
3557
3558 if (chan->sent) {
3559 chan->sent = 0;
3560 continue;
3561 }
3562
3563 if (skb_queue_empty(&chan->data_q))
3564 continue;
3565
3566 skb = skb_peek(&chan->data_q);
3567 if (skb->priority >= HCI_PRIO_MAX - 1)
3568 continue;
3569
3570 skb->priority = HCI_PRIO_MAX - 1;
3571
3572 BT_DBG("chan %p skb %p promoted to %d", chan, skb,
3573 skb->priority);
3574 }
3575
3576 if (hci_conn_num(hdev, type) == num)
3577 break;
3578 }
3579
3580 rcu_read_unlock();
3581
3582}
3583
3584static void __check_timeout(struct hci_dev *hdev, unsigned int cnt, u8 type)
3585{
3586 unsigned long last_tx;
3587
3588 if (hci_dev_test_flag(hdev, HCI_UNCONFIGURED))
3589 return;
3590
3591 switch (type) {
3592 case LE_LINK:
3593 last_tx = hdev->le_last_tx;
3594 break;
3595 default:
3596 last_tx = hdev->acl_last_tx;
3597 break;
3598 }
3599
3600 /* tx timeout must be longer than maximum link supervision timeout
3601 * (40.9 seconds)
3602 */
3603 if (!cnt && time_after(jiffies, last_tx + HCI_ACL_TX_TIMEOUT))
3604 hci_link_tx_to(hdev, type);
3605}
3606
3607/* Schedule SCO */
3608static void hci_sched_sco(struct hci_dev *hdev)
3609{
3610 struct hci_conn *conn;
3611 struct sk_buff *skb;
3612 int quote;
3613
3614 BT_DBG("%s", hdev->name);
3615
3616 if (!hci_conn_num(hdev, SCO_LINK))
3617 return;
3618
3619 while (hdev->sco_cnt && (conn = hci_low_sent(hdev, SCO_LINK, "e))) {
3620 while (quote-- && (skb = skb_dequeue(&conn->data_q))) {
3621 BT_DBG("skb %p len %d", skb, skb->len);
3622 hci_send_frame(hdev, skb);
3623
3624 conn->sent++;
3625 if (conn->sent == ~0)
3626 conn->sent = 0;
3627 }
3628 }
3629}
3630
3631static void hci_sched_esco(struct hci_dev *hdev)
3632{
3633 struct hci_conn *conn;
3634 struct sk_buff *skb;
3635 int quote;
3636
3637 BT_DBG("%s", hdev->name);
3638
3639 if (!hci_conn_num(hdev, ESCO_LINK))
3640 return;
3641
3642 while (hdev->sco_cnt && (conn = hci_low_sent(hdev, ESCO_LINK,
3643 "e))) {
3644 while (quote-- && (skb = skb_dequeue(&conn->data_q))) {
3645 BT_DBG("skb %p len %d", skb, skb->len);
3646 hci_send_frame(hdev, skb);
3647
3648 conn->sent++;
3649 if (conn->sent == ~0)
3650 conn->sent = 0;
3651 }
3652 }
3653}
3654
3655static void hci_sched_acl_pkt(struct hci_dev *hdev)
3656{
3657 unsigned int cnt = hdev->acl_cnt;
3658 struct hci_chan *chan;
3659 struct sk_buff *skb;
3660 int quote;
3661
3662 __check_timeout(hdev, cnt, ACL_LINK);
3663
3664 while (hdev->acl_cnt &&
3665 (chan = hci_chan_sent(hdev, ACL_LINK, "e))) {
3666 u32 priority = (skb_peek(&chan->data_q))->priority;
3667 while (quote-- && (skb = skb_peek(&chan->data_q))) {
3668 BT_DBG("chan %p skb %p len %d priority %u", chan, skb,
3669 skb->len, skb->priority);
3670
3671 /* Stop if priority has changed */
3672 if (skb->priority < priority)
3673 break;
3674
3675 skb = skb_dequeue(&chan->data_q);
3676
3677 hci_conn_enter_active_mode(chan->conn,
3678 bt_cb(skb)->force_active);
3679
3680 hci_send_frame(hdev, skb);
3681 hdev->acl_last_tx = jiffies;
3682
3683 hdev->acl_cnt--;
3684 chan->sent++;
3685 chan->conn->sent++;
3686
3687 /* Send pending SCO packets right away */
3688 hci_sched_sco(hdev);
3689 hci_sched_esco(hdev);
3690 }
3691 }
3692
3693 if (cnt != hdev->acl_cnt)
3694 hci_prio_recalculate(hdev, ACL_LINK);
3695}
3696
3697static void hci_sched_acl(struct hci_dev *hdev)
3698{
3699 BT_DBG("%s", hdev->name);
3700
3701 /* No ACL link over BR/EDR controller */
3702 if (!hci_conn_num(hdev, ACL_LINK))
3703 return;
3704
3705 hci_sched_acl_pkt(hdev);
3706}
3707
3708static void hci_sched_le(struct hci_dev *hdev)
3709{
3710 struct hci_chan *chan;
3711 struct sk_buff *skb;
3712 int quote, cnt, tmp;
3713
3714 BT_DBG("%s", hdev->name);
3715
3716 if (!hci_conn_num(hdev, LE_LINK))
3717 return;
3718
3719 cnt = hdev->le_pkts ? hdev->le_cnt : hdev->acl_cnt;
3720
3721 __check_timeout(hdev, cnt, LE_LINK);
3722
3723 tmp = cnt;
3724 while (cnt && (chan = hci_chan_sent(hdev, LE_LINK, "e))) {
3725 u32 priority = (skb_peek(&chan->data_q))->priority;
3726 while (quote-- && (skb = skb_peek(&chan->data_q))) {
3727 BT_DBG("chan %p skb %p len %d priority %u", chan, skb,
3728 skb->len, skb->priority);
3729
3730 /* Stop if priority has changed */
3731 if (skb->priority < priority)
3732 break;
3733
3734 skb = skb_dequeue(&chan->data_q);
3735
3736 hci_send_frame(hdev, skb);
3737 hdev->le_last_tx = jiffies;
3738
3739 cnt--;
3740 chan->sent++;
3741 chan->conn->sent++;
3742
3743 /* Send pending SCO packets right away */
3744 hci_sched_sco(hdev);
3745 hci_sched_esco(hdev);
3746 }
3747 }
3748
3749 if (hdev->le_pkts)
3750 hdev->le_cnt = cnt;
3751 else
3752 hdev->acl_cnt = cnt;
3753
3754 if (cnt != tmp)
3755 hci_prio_recalculate(hdev, LE_LINK);
3756}
3757
3758/* Schedule CIS */
3759static void hci_sched_iso(struct hci_dev *hdev)
3760{
3761 struct hci_conn *conn;
3762 struct sk_buff *skb;
3763 int quote, *cnt;
3764
3765 BT_DBG("%s", hdev->name);
3766
3767 if (!hci_conn_num(hdev, ISO_LINK))
3768 return;
3769
3770 cnt = hdev->iso_pkts ? &hdev->iso_cnt :
3771 hdev->le_pkts ? &hdev->le_cnt : &hdev->acl_cnt;
3772 while (*cnt && (conn = hci_low_sent(hdev, ISO_LINK, "e))) {
3773 while (quote-- && (skb = skb_dequeue(&conn->data_q))) {
3774 BT_DBG("skb %p len %d", skb, skb->len);
3775 hci_send_frame(hdev, skb);
3776
3777 conn->sent++;
3778 if (conn->sent == ~0)
3779 conn->sent = 0;
3780 (*cnt)--;
3781 }
3782 }
3783}
3784
3785static void hci_tx_work(struct work_struct *work)
3786{
3787 struct hci_dev *hdev = container_of(work, struct hci_dev, tx_work);
3788 struct sk_buff *skb;
3789
3790 BT_DBG("%s acl %d sco %d le %d iso %d", hdev->name, hdev->acl_cnt,
3791 hdev->sco_cnt, hdev->le_cnt, hdev->iso_cnt);
3792
3793 if (!hci_dev_test_flag(hdev, HCI_USER_CHANNEL)) {
3794 /* Schedule queues and send stuff to HCI driver */
3795 hci_sched_sco(hdev);
3796 hci_sched_esco(hdev);
3797 hci_sched_iso(hdev);
3798 hci_sched_acl(hdev);
3799 hci_sched_le(hdev);
3800 }
3801
3802 /* Send next queued raw (unknown type) packet */
3803 while ((skb = skb_dequeue(&hdev->raw_q)))
3804 hci_send_frame(hdev, skb);
3805}
3806
3807/* ----- HCI RX task (incoming data processing) ----- */
3808
3809/* ACL data packet */
3810static void hci_acldata_packet(struct hci_dev *hdev, struct sk_buff *skb)
3811{
3812 struct hci_acl_hdr *hdr = (void *) skb->data;
3813 struct hci_conn *conn;
3814 __u16 handle, flags;
3815
3816 skb_pull(skb, HCI_ACL_HDR_SIZE);
3817
3818 handle = __le16_to_cpu(hdr->handle);
3819 flags = hci_flags(handle);
3820 handle = hci_handle(handle);
3821
3822 BT_DBG("%s len %d handle 0x%4.4x flags 0x%4.4x", hdev->name, skb->len,
3823 handle, flags);
3824
3825 hdev->stat.acl_rx++;
3826
3827 hci_dev_lock(hdev);
3828 conn = hci_conn_hash_lookup_handle(hdev, handle);
3829 hci_dev_unlock(hdev);
3830
3831 if (conn) {
3832 hci_conn_enter_active_mode(conn, BT_POWER_FORCE_ACTIVE_OFF);
3833
3834 /* Send to upper protocol */
3835 l2cap_recv_acldata(conn, skb, flags);
3836 return;
3837 } else {
3838 bt_dev_err(hdev, "ACL packet for unknown connection handle %d",
3839 handle);
3840 }
3841
3842 kfree_skb(skb);
3843}
3844
3845/* SCO data packet */
3846static void hci_scodata_packet(struct hci_dev *hdev, struct sk_buff *skb)
3847{
3848 struct hci_sco_hdr *hdr = (void *) skb->data;
3849 struct hci_conn *conn;
3850 __u16 handle, flags;
3851
3852 skb_pull(skb, HCI_SCO_HDR_SIZE);
3853
3854 handle = __le16_to_cpu(hdr->handle);
3855 flags = hci_flags(handle);
3856 handle = hci_handle(handle);
3857
3858 BT_DBG("%s len %d handle 0x%4.4x flags 0x%4.4x", hdev->name, skb->len,
3859 handle, flags);
3860
3861 hdev->stat.sco_rx++;
3862
3863 hci_dev_lock(hdev);
3864 conn = hci_conn_hash_lookup_handle(hdev, handle);
3865 hci_dev_unlock(hdev);
3866
3867 if (conn) {
3868 /* Send to upper protocol */
3869 hci_skb_pkt_status(skb) = flags & 0x03;
3870 sco_recv_scodata(conn, skb);
3871 return;
3872 } else {
3873 bt_dev_err_ratelimited(hdev, "SCO packet for unknown connection handle %d",
3874 handle);
3875 }
3876
3877 kfree_skb(skb);
3878}
3879
3880static void hci_isodata_packet(struct hci_dev *hdev, struct sk_buff *skb)
3881{
3882 struct hci_iso_hdr *hdr;
3883 struct hci_conn *conn;
3884 __u16 handle, flags;
3885
3886 hdr = skb_pull_data(skb, sizeof(*hdr));
3887 if (!hdr) {
3888 bt_dev_err(hdev, "ISO packet too small");
3889 goto drop;
3890 }
3891
3892 handle = __le16_to_cpu(hdr->handle);
3893 flags = hci_flags(handle);
3894 handle = hci_handle(handle);
3895
3896 bt_dev_dbg(hdev, "len %d handle 0x%4.4x flags 0x%4.4x", skb->len,
3897 handle, flags);
3898
3899 hci_dev_lock(hdev);
3900 conn = hci_conn_hash_lookup_handle(hdev, handle);
3901 hci_dev_unlock(hdev);
3902
3903 if (!conn) {
3904 bt_dev_err(hdev, "ISO packet for unknown connection handle %d",
3905 handle);
3906 goto drop;
3907 }
3908
3909 /* Send to upper protocol */
3910 iso_recv(conn, skb, flags);
3911 return;
3912
3913drop:
3914 kfree_skb(skb);
3915}
3916
3917static bool hci_req_is_complete(struct hci_dev *hdev)
3918{
3919 struct sk_buff *skb;
3920
3921 skb = skb_peek(&hdev->cmd_q);
3922 if (!skb)
3923 return true;
3924
3925 return (bt_cb(skb)->hci.req_flags & HCI_REQ_START);
3926}
3927
3928static void hci_resend_last(struct hci_dev *hdev)
3929{
3930 struct hci_command_hdr *sent;
3931 struct sk_buff *skb;
3932 u16 opcode;
3933
3934 if (!hdev->sent_cmd)
3935 return;
3936
3937 sent = (void *) hdev->sent_cmd->data;
3938 opcode = __le16_to_cpu(sent->opcode);
3939 if (opcode == HCI_OP_RESET)
3940 return;
3941
3942 skb = skb_clone(hdev->sent_cmd, GFP_KERNEL);
3943 if (!skb)
3944 return;
3945
3946 skb_queue_head(&hdev->cmd_q, skb);
3947 queue_work(hdev->workqueue, &hdev->cmd_work);
3948}
3949
3950void hci_req_cmd_complete(struct hci_dev *hdev, u16 opcode, u8 status,
3951 hci_req_complete_t *req_complete,
3952 hci_req_complete_skb_t *req_complete_skb)
3953{
3954 struct sk_buff *skb;
3955 unsigned long flags;
3956
3957 BT_DBG("opcode 0x%04x status 0x%02x", opcode, status);
3958
3959 /* If the completed command doesn't match the last one that was
3960 * sent we need to do special handling of it.
3961 */
3962 if (!hci_sent_cmd_data(hdev, opcode)) {
3963 /* Some CSR based controllers generate a spontaneous
3964 * reset complete event during init and any pending
3965 * command will never be completed. In such a case we
3966 * need to resend whatever was the last sent
3967 * command.
3968 */
3969 if (test_bit(HCI_INIT, &hdev->flags) && opcode == HCI_OP_RESET)
3970 hci_resend_last(hdev);
3971
3972 return;
3973 }
3974
3975 /* If we reach this point this event matches the last command sent */
3976 hci_dev_clear_flag(hdev, HCI_CMD_PENDING);
3977
3978 /* If the command succeeded and there's still more commands in
3979 * this request the request is not yet complete.
3980 */
3981 if (!status && !hci_req_is_complete(hdev))
3982 return;
3983
3984 skb = hdev->req_skb;
3985
3986 /* If this was the last command in a request the complete
3987 * callback would be found in hdev->req_skb instead of the
3988 * command queue (hdev->cmd_q).
3989 */
3990 if (skb && bt_cb(skb)->hci.req_flags & HCI_REQ_SKB) {
3991 *req_complete_skb = bt_cb(skb)->hci.req_complete_skb;
3992 return;
3993 }
3994
3995 if (skb && bt_cb(skb)->hci.req_complete) {
3996 *req_complete = bt_cb(skb)->hci.req_complete;
3997 return;
3998 }
3999
4000 /* Remove all pending commands belonging to this request */
4001 spin_lock_irqsave(&hdev->cmd_q.lock, flags);
4002 while ((skb = __skb_dequeue(&hdev->cmd_q))) {
4003 if (bt_cb(skb)->hci.req_flags & HCI_REQ_START) {
4004 __skb_queue_head(&hdev->cmd_q, skb);
4005 break;
4006 }
4007
4008 if (bt_cb(skb)->hci.req_flags & HCI_REQ_SKB)
4009 *req_complete_skb = bt_cb(skb)->hci.req_complete_skb;
4010 else
4011 *req_complete = bt_cb(skb)->hci.req_complete;
4012 dev_kfree_skb_irq(skb);
4013 }
4014 spin_unlock_irqrestore(&hdev->cmd_q.lock, flags);
4015}
4016
4017static void hci_rx_work(struct work_struct *work)
4018{
4019 struct hci_dev *hdev = container_of(work, struct hci_dev, rx_work);
4020 struct sk_buff *skb;
4021
4022 BT_DBG("%s", hdev->name);
4023
4024 /* The kcov_remote functions used for collecting packet parsing
4025 * coverage information from this background thread and associate
4026 * the coverage with the syscall's thread which originally injected
4027 * the packet. This helps fuzzing the kernel.
4028 */
4029 for (; (skb = skb_dequeue(&hdev->rx_q)); kcov_remote_stop()) {
4030 kcov_remote_start_common(skb_get_kcov_handle(skb));
4031
4032 /* Send copy to monitor */
4033 hci_send_to_monitor(hdev, skb);
4034
4035 if (atomic_read(&hdev->promisc)) {
4036 /* Send copy to the sockets */
4037 hci_send_to_sock(hdev, skb);
4038 }
4039
4040 /* If the device has been opened in HCI_USER_CHANNEL,
4041 * the userspace has exclusive access to device.
4042 * When device is HCI_INIT, we still need to process
4043 * the data packets to the driver in order
4044 * to complete its setup().
4045 */
4046 if (hci_dev_test_flag(hdev, HCI_USER_CHANNEL) &&
4047 !test_bit(HCI_INIT, &hdev->flags)) {
4048 kfree_skb(skb);
4049 continue;
4050 }
4051
4052 if (test_bit(HCI_INIT, &hdev->flags)) {
4053 /* Don't process data packets in this states. */
4054 switch (hci_skb_pkt_type(skb)) {
4055 case HCI_ACLDATA_PKT:
4056 case HCI_SCODATA_PKT:
4057 case HCI_ISODATA_PKT:
4058 kfree_skb(skb);
4059 continue;
4060 }
4061 }
4062
4063 /* Process frame */
4064 switch (hci_skb_pkt_type(skb)) {
4065 case HCI_EVENT_PKT:
4066 BT_DBG("%s Event packet", hdev->name);
4067 hci_event_packet(hdev, skb);
4068 break;
4069
4070 case HCI_ACLDATA_PKT:
4071 BT_DBG("%s ACL data packet", hdev->name);
4072 hci_acldata_packet(hdev, skb);
4073 break;
4074
4075 case HCI_SCODATA_PKT:
4076 BT_DBG("%s SCO data packet", hdev->name);
4077 hci_scodata_packet(hdev, skb);
4078 break;
4079
4080 case HCI_ISODATA_PKT:
4081 BT_DBG("%s ISO data packet", hdev->name);
4082 hci_isodata_packet(hdev, skb);
4083 break;
4084
4085 default:
4086 kfree_skb(skb);
4087 break;
4088 }
4089 }
4090}
4091
4092static void hci_send_cmd_sync(struct hci_dev *hdev, struct sk_buff *skb)
4093{
4094 int err;
4095
4096 bt_dev_dbg(hdev, "skb %p", skb);
4097
4098 kfree_skb(hdev->sent_cmd);
4099
4100 hdev->sent_cmd = skb_clone(skb, GFP_KERNEL);
4101 if (!hdev->sent_cmd) {
4102 skb_queue_head(&hdev->cmd_q, skb);
4103 queue_work(hdev->workqueue, &hdev->cmd_work);
4104 return;
4105 }
4106
4107 err = hci_send_frame(hdev, skb);
4108 if (err < 0) {
4109 hci_cmd_sync_cancel_sync(hdev, -err);
4110 return;
4111 }
4112
4113 if (hci_req_status_pend(hdev) &&
4114 !hci_dev_test_and_set_flag(hdev, HCI_CMD_PENDING)) {
4115 kfree_skb(hdev->req_skb);
4116 hdev->req_skb = skb_clone(hdev->sent_cmd, GFP_KERNEL);
4117 }
4118
4119 atomic_dec(&hdev->cmd_cnt);
4120}
4121
4122static void hci_cmd_work(struct work_struct *work)
4123{
4124 struct hci_dev *hdev = container_of(work, struct hci_dev, cmd_work);
4125 struct sk_buff *skb;
4126
4127 BT_DBG("%s cmd_cnt %d cmd queued %d", hdev->name,
4128 atomic_read(&hdev->cmd_cnt), skb_queue_len(&hdev->cmd_q));
4129
4130 /* Send queued commands */
4131 if (atomic_read(&hdev->cmd_cnt)) {
4132 skb = skb_dequeue(&hdev->cmd_q);
4133 if (!skb)
4134 return;
4135
4136 hci_send_cmd_sync(hdev, skb);
4137
4138 rcu_read_lock();
4139 if (test_bit(HCI_RESET, &hdev->flags) ||
4140 hci_dev_test_flag(hdev, HCI_CMD_DRAIN_WORKQUEUE))
4141 cancel_delayed_work(&hdev->cmd_timer);
4142 else
4143 queue_delayed_work(hdev->workqueue, &hdev->cmd_timer,
4144 HCI_CMD_TIMEOUT);
4145 rcu_read_unlock();
4146 }
4147}