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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 <linux/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_debugfs.h"
44#include "smp.h"
45#include "leds.h"
46#include "msft.h"
47#include "aosp.h"
48#include "hci_codec.h"
49
50static void hci_rx_work(struct work_struct *work);
51static void hci_cmd_work(struct work_struct *work);
52static void hci_tx_work(struct work_struct *work);
53
54/* HCI device list */
55LIST_HEAD(hci_dev_list);
56DEFINE_RWLOCK(hci_dev_list_lock);
57
58/* HCI callback list */
59LIST_HEAD(hci_cb_list);
60
61/* HCI ID Numbering */
62static DEFINE_IDA(hci_index_ida);
63
64/* Get HCI device by index.
65 * Device is held on return. */
66struct hci_dev *hci_dev_get(int index)
67{
68 struct hci_dev *hdev = NULL, *d;
69
70 BT_DBG("%d", index);
71
72 if (index < 0)
73 return NULL;
74
75 read_lock(&hci_dev_list_lock);
76 list_for_each_entry(d, &hci_dev_list, list) {
77 if (d->id == index) {
78 hdev = hci_dev_hold(d);
79 break;
80 }
81 }
82 read_unlock(&hci_dev_list_lock);
83 return hdev;
84}
85
86/* ---- Inquiry support ---- */
87
88bool hci_discovery_active(struct hci_dev *hdev)
89{
90 struct discovery_state *discov = &hdev->discovery;
91
92 switch (discov->state) {
93 case DISCOVERY_FINDING:
94 case DISCOVERY_RESOLVING:
95 return true;
96
97 default:
98 return false;
99 }
100}
101
102void hci_discovery_set_state(struct hci_dev *hdev, int state)
103{
104 int old_state = hdev->discovery.state;
105
106 if (old_state == state)
107 return;
108
109 hdev->discovery.state = state;
110
111 switch (state) {
112 case DISCOVERY_STOPPED:
113 hci_update_passive_scan(hdev);
114
115 if (old_state != DISCOVERY_STARTING)
116 mgmt_discovering(hdev, 0);
117 break;
118 case DISCOVERY_STARTING:
119 break;
120 case DISCOVERY_FINDING:
121 mgmt_discovering(hdev, 1);
122 break;
123 case DISCOVERY_RESOLVING:
124 break;
125 case DISCOVERY_STOPPING:
126 break;
127 }
128
129 bt_dev_dbg(hdev, "state %u -> %u", old_state, state);
130}
131
132void hci_inquiry_cache_flush(struct hci_dev *hdev)
133{
134 struct discovery_state *cache = &hdev->discovery;
135 struct inquiry_entry *p, *n;
136
137 list_for_each_entry_safe(p, n, &cache->all, all) {
138 list_del(&p->all);
139 kfree(p);
140 }
141
142 INIT_LIST_HEAD(&cache->unknown);
143 INIT_LIST_HEAD(&cache->resolve);
144}
145
146struct inquiry_entry *hci_inquiry_cache_lookup(struct hci_dev *hdev,
147 bdaddr_t *bdaddr)
148{
149 struct discovery_state *cache = &hdev->discovery;
150 struct inquiry_entry *e;
151
152 BT_DBG("cache %p, %pMR", cache, bdaddr);
153
154 list_for_each_entry(e, &cache->all, all) {
155 if (!bacmp(&e->data.bdaddr, bdaddr))
156 return e;
157 }
158
159 return NULL;
160}
161
162struct inquiry_entry *hci_inquiry_cache_lookup_unknown(struct hci_dev *hdev,
163 bdaddr_t *bdaddr)
164{
165 struct discovery_state *cache = &hdev->discovery;
166 struct inquiry_entry *e;
167
168 BT_DBG("cache %p, %pMR", cache, bdaddr);
169
170 list_for_each_entry(e, &cache->unknown, list) {
171 if (!bacmp(&e->data.bdaddr, bdaddr))
172 return e;
173 }
174
175 return NULL;
176}
177
178struct inquiry_entry *hci_inquiry_cache_lookup_resolve(struct hci_dev *hdev,
179 bdaddr_t *bdaddr,
180 int state)
181{
182 struct discovery_state *cache = &hdev->discovery;
183 struct inquiry_entry *e;
184
185 BT_DBG("cache %p bdaddr %pMR state %d", cache, bdaddr, state);
186
187 list_for_each_entry(e, &cache->resolve, list) {
188 if (!bacmp(bdaddr, BDADDR_ANY) && e->name_state == state)
189 return e;
190 if (!bacmp(&e->data.bdaddr, bdaddr))
191 return e;
192 }
193
194 return NULL;
195}
196
197void hci_inquiry_cache_update_resolve(struct hci_dev *hdev,
198 struct inquiry_entry *ie)
199{
200 struct discovery_state *cache = &hdev->discovery;
201 struct list_head *pos = &cache->resolve;
202 struct inquiry_entry *p;
203
204 list_del(&ie->list);
205
206 list_for_each_entry(p, &cache->resolve, list) {
207 if (p->name_state != NAME_PENDING &&
208 abs(p->data.rssi) >= abs(ie->data.rssi))
209 break;
210 pos = &p->list;
211 }
212
213 list_add(&ie->list, pos);
214}
215
216u32 hci_inquiry_cache_update(struct hci_dev *hdev, struct inquiry_data *data,
217 bool name_known)
218{
219 struct discovery_state *cache = &hdev->discovery;
220 struct inquiry_entry *ie;
221 u32 flags = 0;
222
223 BT_DBG("cache %p, %pMR", cache, &data->bdaddr);
224
225 hci_remove_remote_oob_data(hdev, &data->bdaddr, BDADDR_BREDR);
226
227 if (!data->ssp_mode)
228 flags |= MGMT_DEV_FOUND_LEGACY_PAIRING;
229
230 ie = hci_inquiry_cache_lookup(hdev, &data->bdaddr);
231 if (ie) {
232 if (!ie->data.ssp_mode)
233 flags |= MGMT_DEV_FOUND_LEGACY_PAIRING;
234
235 if (ie->name_state == NAME_NEEDED &&
236 data->rssi != ie->data.rssi) {
237 ie->data.rssi = data->rssi;
238 hci_inquiry_cache_update_resolve(hdev, ie);
239 }
240
241 goto update;
242 }
243
244 /* Entry not in the cache. Add new one. */
245 ie = kzalloc(sizeof(*ie), GFP_KERNEL);
246 if (!ie) {
247 flags |= MGMT_DEV_FOUND_CONFIRM_NAME;
248 goto done;
249 }
250
251 list_add(&ie->all, &cache->all);
252
253 if (name_known) {
254 ie->name_state = NAME_KNOWN;
255 } else {
256 ie->name_state = NAME_NOT_KNOWN;
257 list_add(&ie->list, &cache->unknown);
258 }
259
260update:
261 if (name_known && ie->name_state != NAME_KNOWN &&
262 ie->name_state != NAME_PENDING) {
263 ie->name_state = NAME_KNOWN;
264 list_del(&ie->list);
265 }
266
267 memcpy(&ie->data, data, sizeof(*data));
268 ie->timestamp = jiffies;
269 cache->timestamp = jiffies;
270
271 if (ie->name_state == NAME_NOT_KNOWN)
272 flags |= MGMT_DEV_FOUND_CONFIRM_NAME;
273
274done:
275 return flags;
276}
277
278static int inquiry_cache_dump(struct hci_dev *hdev, int num, __u8 *buf)
279{
280 struct discovery_state *cache = &hdev->discovery;
281 struct inquiry_info *info = (struct inquiry_info *) buf;
282 struct inquiry_entry *e;
283 int copied = 0;
284
285 list_for_each_entry(e, &cache->all, all) {
286 struct inquiry_data *data = &e->data;
287
288 if (copied >= num)
289 break;
290
291 bacpy(&info->bdaddr, &data->bdaddr);
292 info->pscan_rep_mode = data->pscan_rep_mode;
293 info->pscan_period_mode = data->pscan_period_mode;
294 info->pscan_mode = data->pscan_mode;
295 memcpy(info->dev_class, data->dev_class, 3);
296 info->clock_offset = data->clock_offset;
297
298 info++;
299 copied++;
300 }
301
302 BT_DBG("cache %p, copied %d", cache, copied);
303 return copied;
304}
305
306int hci_inquiry(void __user *arg)
307{
308 __u8 __user *ptr = arg;
309 struct hci_inquiry_req ir;
310 struct hci_dev *hdev;
311 int err = 0, do_inquiry = 0, max_rsp;
312 __u8 *buf;
313
314 if (copy_from_user(&ir, ptr, sizeof(ir)))
315 return -EFAULT;
316
317 hdev = hci_dev_get(ir.dev_id);
318 if (!hdev)
319 return -ENODEV;
320
321 if (hci_dev_test_flag(hdev, HCI_USER_CHANNEL)) {
322 err = -EBUSY;
323 goto done;
324 }
325
326 if (hci_dev_test_flag(hdev, HCI_UNCONFIGURED)) {
327 err = -EOPNOTSUPP;
328 goto done;
329 }
330
331 if (!hci_dev_test_flag(hdev, HCI_BREDR_ENABLED)) {
332 err = -EOPNOTSUPP;
333 goto done;
334 }
335
336 /* Restrict maximum inquiry length to 60 seconds */
337 if (ir.length > 60) {
338 err = -EINVAL;
339 goto done;
340 }
341
342 hci_dev_lock(hdev);
343 if (inquiry_cache_age(hdev) > INQUIRY_CACHE_AGE_MAX ||
344 inquiry_cache_empty(hdev) || ir.flags & IREQ_CACHE_FLUSH) {
345 hci_inquiry_cache_flush(hdev);
346 do_inquiry = 1;
347 }
348 hci_dev_unlock(hdev);
349
350 if (do_inquiry) {
351 hci_req_sync_lock(hdev);
352 err = hci_inquiry_sync(hdev, ir.length, ir.num_rsp);
353 hci_req_sync_unlock(hdev);
354
355 if (err < 0)
356 goto done;
357
358 /* Wait until Inquiry procedure finishes (HCI_INQUIRY flag is
359 * cleared). If it is interrupted by a signal, return -EINTR.
360 */
361 if (wait_on_bit(&hdev->flags, HCI_INQUIRY,
362 TASK_INTERRUPTIBLE)) {
363 err = -EINTR;
364 goto done;
365 }
366 }
367
368 /* for unlimited number of responses we will use buffer with
369 * 255 entries
370 */
371 max_rsp = (ir.num_rsp == 0) ? 255 : ir.num_rsp;
372
373 /* cache_dump can't sleep. Therefore we allocate temp buffer and then
374 * copy it to the user space.
375 */
376 buf = kmalloc_array(max_rsp, sizeof(struct inquiry_info), GFP_KERNEL);
377 if (!buf) {
378 err = -ENOMEM;
379 goto done;
380 }
381
382 hci_dev_lock(hdev);
383 ir.num_rsp = inquiry_cache_dump(hdev, max_rsp, buf);
384 hci_dev_unlock(hdev);
385
386 BT_DBG("num_rsp %d", ir.num_rsp);
387
388 if (!copy_to_user(ptr, &ir, sizeof(ir))) {
389 ptr += sizeof(ir);
390 if (copy_to_user(ptr, buf, sizeof(struct inquiry_info) *
391 ir.num_rsp))
392 err = -EFAULT;
393 } else
394 err = -EFAULT;
395
396 kfree(buf);
397
398done:
399 hci_dev_put(hdev);
400 return err;
401}
402
403static int hci_dev_do_open(struct hci_dev *hdev)
404{
405 int ret = 0;
406
407 BT_DBG("%s %p", hdev->name, hdev);
408
409 hci_req_sync_lock(hdev);
410
411 ret = hci_dev_open_sync(hdev);
412
413 hci_req_sync_unlock(hdev);
414 return ret;
415}
416
417/* ---- HCI ioctl helpers ---- */
418
419int hci_dev_open(__u16 dev)
420{
421 struct hci_dev *hdev;
422 int err;
423
424 hdev = hci_dev_get(dev);
425 if (!hdev)
426 return -ENODEV;
427
428 /* Devices that are marked as unconfigured can only be powered
429 * up as user channel. Trying to bring them up as normal devices
430 * will result into a failure. Only user channel operation is
431 * possible.
432 *
433 * When this function is called for a user channel, the flag
434 * HCI_USER_CHANNEL will be set first before attempting to
435 * open the device.
436 */
437 if (hci_dev_test_flag(hdev, HCI_UNCONFIGURED) &&
438 !hci_dev_test_flag(hdev, HCI_USER_CHANNEL)) {
439 err = -EOPNOTSUPP;
440 goto done;
441 }
442
443 /* We need to ensure that no other power on/off work is pending
444 * before proceeding to call hci_dev_do_open. This is
445 * particularly important if the setup procedure has not yet
446 * completed.
447 */
448 if (hci_dev_test_and_clear_flag(hdev, HCI_AUTO_OFF))
449 cancel_delayed_work(&hdev->power_off);
450
451 /* After this call it is guaranteed that the setup procedure
452 * has finished. This means that error conditions like RFKILL
453 * or no valid public or static random address apply.
454 */
455 flush_workqueue(hdev->req_workqueue);
456
457 /* For controllers not using the management interface and that
458 * are brought up using legacy ioctl, set the HCI_BONDABLE bit
459 * so that pairing works for them. Once the management interface
460 * is in use this bit will be cleared again and userspace has
461 * to explicitly enable it.
462 */
463 if (!hci_dev_test_flag(hdev, HCI_USER_CHANNEL) &&
464 !hci_dev_test_flag(hdev, HCI_MGMT))
465 hci_dev_set_flag(hdev, HCI_BONDABLE);
466
467 err = hci_dev_do_open(hdev);
468
469done:
470 hci_dev_put(hdev);
471 return err;
472}
473
474int hci_dev_do_close(struct hci_dev *hdev)
475{
476 int err;
477
478 BT_DBG("%s %p", hdev->name, hdev);
479
480 hci_req_sync_lock(hdev);
481
482 err = hci_dev_close_sync(hdev);
483
484 hci_req_sync_unlock(hdev);
485
486 return err;
487}
488
489int hci_dev_close(__u16 dev)
490{
491 struct hci_dev *hdev;
492 int err;
493
494 hdev = hci_dev_get(dev);
495 if (!hdev)
496 return -ENODEV;
497
498 if (hci_dev_test_flag(hdev, HCI_USER_CHANNEL)) {
499 err = -EBUSY;
500 goto done;
501 }
502
503 cancel_work_sync(&hdev->power_on);
504 if (hci_dev_test_and_clear_flag(hdev, HCI_AUTO_OFF))
505 cancel_delayed_work(&hdev->power_off);
506
507 err = hci_dev_do_close(hdev);
508
509done:
510 hci_dev_put(hdev);
511 return err;
512}
513
514static int hci_dev_do_reset(struct hci_dev *hdev)
515{
516 int ret;
517
518 BT_DBG("%s %p", hdev->name, hdev);
519
520 hci_req_sync_lock(hdev);
521
522 /* Drop queues */
523 skb_queue_purge(&hdev->rx_q);
524 skb_queue_purge(&hdev->cmd_q);
525
526 /* Cancel these to avoid queueing non-chained pending work */
527 hci_dev_set_flag(hdev, HCI_CMD_DRAIN_WORKQUEUE);
528 /* Wait for
529 *
530 * if (!hci_dev_test_flag(hdev, HCI_CMD_DRAIN_WORKQUEUE))
531 * queue_delayed_work(&hdev->{cmd,ncmd}_timer)
532 *
533 * inside RCU section to see the flag or complete scheduling.
534 */
535 synchronize_rcu();
536 /* Explicitly cancel works in case scheduled after setting the flag. */
537 cancel_delayed_work(&hdev->cmd_timer);
538 cancel_delayed_work(&hdev->ncmd_timer);
539
540 /* Avoid potential lockdep warnings from the *_flush() calls by
541 * ensuring the workqueue is empty up front.
542 */
543 drain_workqueue(hdev->workqueue);
544
545 hci_dev_lock(hdev);
546 hci_inquiry_cache_flush(hdev);
547 hci_conn_hash_flush(hdev);
548 hci_dev_unlock(hdev);
549
550 if (hdev->flush)
551 hdev->flush(hdev);
552
553 hci_dev_clear_flag(hdev, HCI_CMD_DRAIN_WORKQUEUE);
554
555 atomic_set(&hdev->cmd_cnt, 1);
556 hdev->acl_cnt = 0;
557 hdev->sco_cnt = 0;
558 hdev->le_cnt = 0;
559 hdev->iso_cnt = 0;
560
561 ret = hci_reset_sync(hdev);
562
563 hci_req_sync_unlock(hdev);
564 return ret;
565}
566
567int hci_dev_reset(__u16 dev)
568{
569 struct hci_dev *hdev;
570 int err;
571
572 hdev = hci_dev_get(dev);
573 if (!hdev)
574 return -ENODEV;
575
576 if (!test_bit(HCI_UP, &hdev->flags)) {
577 err = -ENETDOWN;
578 goto done;
579 }
580
581 if (hci_dev_test_flag(hdev, HCI_USER_CHANNEL)) {
582 err = -EBUSY;
583 goto done;
584 }
585
586 if (hci_dev_test_flag(hdev, HCI_UNCONFIGURED)) {
587 err = -EOPNOTSUPP;
588 goto done;
589 }
590
591 err = hci_dev_do_reset(hdev);
592
593done:
594 hci_dev_put(hdev);
595 return err;
596}
597
598int hci_dev_reset_stat(__u16 dev)
599{
600 struct hci_dev *hdev;
601 int ret = 0;
602
603 hdev = hci_dev_get(dev);
604 if (!hdev)
605 return -ENODEV;
606
607 if (hci_dev_test_flag(hdev, HCI_USER_CHANNEL)) {
608 ret = -EBUSY;
609 goto done;
610 }
611
612 if (hci_dev_test_flag(hdev, HCI_UNCONFIGURED)) {
613 ret = -EOPNOTSUPP;
614 goto done;
615 }
616
617 memset(&hdev->stat, 0, sizeof(struct hci_dev_stats));
618
619done:
620 hci_dev_put(hdev);
621 return ret;
622}
623
624static void hci_update_passive_scan_state(struct hci_dev *hdev, u8 scan)
625{
626 bool conn_changed, discov_changed;
627
628 BT_DBG("%s scan 0x%02x", hdev->name, scan);
629
630 if ((scan & SCAN_PAGE))
631 conn_changed = !hci_dev_test_and_set_flag(hdev,
632 HCI_CONNECTABLE);
633 else
634 conn_changed = hci_dev_test_and_clear_flag(hdev,
635 HCI_CONNECTABLE);
636
637 if ((scan & SCAN_INQUIRY)) {
638 discov_changed = !hci_dev_test_and_set_flag(hdev,
639 HCI_DISCOVERABLE);
640 } else {
641 hci_dev_clear_flag(hdev, HCI_LIMITED_DISCOVERABLE);
642 discov_changed = hci_dev_test_and_clear_flag(hdev,
643 HCI_DISCOVERABLE);
644 }
645
646 if (!hci_dev_test_flag(hdev, HCI_MGMT))
647 return;
648
649 if (conn_changed || discov_changed) {
650 /* In case this was disabled through mgmt */
651 hci_dev_set_flag(hdev, HCI_BREDR_ENABLED);
652
653 if (hci_dev_test_flag(hdev, HCI_LE_ENABLED))
654 hci_update_adv_data(hdev, hdev->cur_adv_instance);
655
656 mgmt_new_settings(hdev);
657 }
658}
659
660int hci_dev_cmd(unsigned int cmd, void __user *arg)
661{
662 struct hci_dev *hdev;
663 struct hci_dev_req dr;
664 __le16 policy;
665 int err = 0;
666
667 if (copy_from_user(&dr, arg, sizeof(dr)))
668 return -EFAULT;
669
670 hdev = hci_dev_get(dr.dev_id);
671 if (!hdev)
672 return -ENODEV;
673
674 if (hci_dev_test_flag(hdev, HCI_USER_CHANNEL)) {
675 err = -EBUSY;
676 goto done;
677 }
678
679 if (hci_dev_test_flag(hdev, HCI_UNCONFIGURED)) {
680 err = -EOPNOTSUPP;
681 goto done;
682 }
683
684 if (!hci_dev_test_flag(hdev, HCI_BREDR_ENABLED)) {
685 err = -EOPNOTSUPP;
686 goto done;
687 }
688
689 switch (cmd) {
690 case HCISETAUTH:
691 err = hci_cmd_sync_status(hdev, HCI_OP_WRITE_AUTH_ENABLE,
692 1, &dr.dev_opt, HCI_CMD_TIMEOUT);
693 break;
694
695 case HCISETENCRYPT:
696 if (!lmp_encrypt_capable(hdev)) {
697 err = -EOPNOTSUPP;
698 break;
699 }
700
701 if (!test_bit(HCI_AUTH, &hdev->flags)) {
702 /* Auth must be enabled first */
703 err = hci_cmd_sync_status(hdev,
704 HCI_OP_WRITE_AUTH_ENABLE,
705 1, &dr.dev_opt,
706 HCI_CMD_TIMEOUT);
707 if (err)
708 break;
709 }
710
711 err = hci_cmd_sync_status(hdev, HCI_OP_WRITE_ENCRYPT_MODE,
712 1, &dr.dev_opt, HCI_CMD_TIMEOUT);
713 break;
714
715 case HCISETSCAN:
716 err = hci_cmd_sync_status(hdev, HCI_OP_WRITE_SCAN_ENABLE,
717 1, &dr.dev_opt, HCI_CMD_TIMEOUT);
718
719 /* Ensure that the connectable and discoverable states
720 * get correctly modified as this was a non-mgmt change.
721 */
722 if (!err)
723 hci_update_passive_scan_state(hdev, dr.dev_opt);
724 break;
725
726 case HCISETLINKPOL:
727 policy = cpu_to_le16(dr.dev_opt);
728
729 err = hci_cmd_sync_status(hdev, HCI_OP_WRITE_DEF_LINK_POLICY,
730 2, &policy, HCI_CMD_TIMEOUT);
731 break;
732
733 case HCISETLINKMODE:
734 hdev->link_mode = ((__u16) dr.dev_opt) &
735 (HCI_LM_MASTER | HCI_LM_ACCEPT);
736 break;
737
738 case HCISETPTYPE:
739 if (hdev->pkt_type == (__u16) dr.dev_opt)
740 break;
741
742 hdev->pkt_type = (__u16) dr.dev_opt;
743 mgmt_phy_configuration_changed(hdev, NULL);
744 break;
745
746 case HCISETACLMTU:
747 hdev->acl_mtu = *((__u16 *) &dr.dev_opt + 1);
748 hdev->acl_pkts = *((__u16 *) &dr.dev_opt + 0);
749 break;
750
751 case HCISETSCOMTU:
752 hdev->sco_mtu = *((__u16 *) &dr.dev_opt + 1);
753 hdev->sco_pkts = *((__u16 *) &dr.dev_opt + 0);
754 break;
755
756 default:
757 err = -EINVAL;
758 break;
759 }
760
761done:
762 hci_dev_put(hdev);
763 return err;
764}
765
766int hci_get_dev_list(void __user *arg)
767{
768 struct hci_dev *hdev;
769 struct hci_dev_list_req *dl;
770 struct hci_dev_req *dr;
771 int n = 0, err;
772 __u16 dev_num;
773
774 if (get_user(dev_num, (__u16 __user *) arg))
775 return -EFAULT;
776
777 if (!dev_num || dev_num > (PAGE_SIZE * 2) / sizeof(*dr))
778 return -EINVAL;
779
780 dl = kzalloc(struct_size(dl, dev_req, dev_num), GFP_KERNEL);
781 if (!dl)
782 return -ENOMEM;
783
784 dl->dev_num = dev_num;
785 dr = dl->dev_req;
786
787 read_lock(&hci_dev_list_lock);
788 list_for_each_entry(hdev, &hci_dev_list, list) {
789 unsigned long flags = hdev->flags;
790
791 /* When the auto-off is configured it means the transport
792 * is running, but in that case still indicate that the
793 * device is actually down.
794 */
795 if (hci_dev_test_flag(hdev, HCI_AUTO_OFF))
796 flags &= ~BIT(HCI_UP);
797
798 dr[n].dev_id = hdev->id;
799 dr[n].dev_opt = flags;
800
801 if (++n >= dev_num)
802 break;
803 }
804 read_unlock(&hci_dev_list_lock);
805
806 dl->dev_num = n;
807 err = copy_to_user(arg, dl, struct_size(dl, dev_req, n));
808 kfree(dl);
809
810 return err ? -EFAULT : 0;
811}
812
813int hci_get_dev_info(void __user *arg)
814{
815 struct hci_dev *hdev;
816 struct hci_dev_info di;
817 unsigned long flags;
818 int err = 0;
819
820 if (copy_from_user(&di, arg, sizeof(di)))
821 return -EFAULT;
822
823 hdev = hci_dev_get(di.dev_id);
824 if (!hdev)
825 return -ENODEV;
826
827 /* When the auto-off is configured it means the transport
828 * is running, but in that case still indicate that the
829 * device is actually down.
830 */
831 if (hci_dev_test_flag(hdev, HCI_AUTO_OFF))
832 flags = hdev->flags & ~BIT(HCI_UP);
833 else
834 flags = hdev->flags;
835
836 strscpy(di.name, hdev->name, sizeof(di.name));
837 di.bdaddr = hdev->bdaddr;
838 di.type = (hdev->bus & 0x0f);
839 di.flags = flags;
840 di.pkt_type = hdev->pkt_type;
841 if (lmp_bredr_capable(hdev)) {
842 di.acl_mtu = hdev->acl_mtu;
843 di.acl_pkts = hdev->acl_pkts;
844 di.sco_mtu = hdev->sco_mtu;
845 di.sco_pkts = hdev->sco_pkts;
846 } else {
847 di.acl_mtu = hdev->le_mtu;
848 di.acl_pkts = hdev->le_pkts;
849 di.sco_mtu = 0;
850 di.sco_pkts = 0;
851 }
852 di.link_policy = hdev->link_policy;
853 di.link_mode = hdev->link_mode;
854
855 memcpy(&di.stat, &hdev->stat, sizeof(di.stat));
856 memcpy(&di.features, &hdev->features, sizeof(di.features));
857
858 if (copy_to_user(arg, &di, sizeof(di)))
859 err = -EFAULT;
860
861 hci_dev_put(hdev);
862
863 return err;
864}
865
866/* ---- Interface to HCI drivers ---- */
867
868static int hci_dev_do_poweroff(struct hci_dev *hdev)
869{
870 int err;
871
872 BT_DBG("%s %p", hdev->name, hdev);
873
874 hci_req_sync_lock(hdev);
875
876 err = hci_set_powered_sync(hdev, false);
877
878 hci_req_sync_unlock(hdev);
879
880 return err;
881}
882
883static int hci_rfkill_set_block(void *data, bool blocked)
884{
885 struct hci_dev *hdev = data;
886 int err;
887
888 BT_DBG("%p name %s blocked %d", hdev, hdev->name, blocked);
889
890 if (hci_dev_test_flag(hdev, HCI_USER_CHANNEL))
891 return -EBUSY;
892
893 if (blocked == hci_dev_test_flag(hdev, HCI_RFKILLED))
894 return 0;
895
896 if (blocked) {
897 hci_dev_set_flag(hdev, HCI_RFKILLED);
898
899 if (!hci_dev_test_flag(hdev, HCI_SETUP) &&
900 !hci_dev_test_flag(hdev, HCI_CONFIG)) {
901 err = hci_dev_do_poweroff(hdev);
902 if (err) {
903 bt_dev_err(hdev, "Error when powering off device on rfkill (%d)",
904 err);
905
906 /* Make sure the device is still closed even if
907 * anything during power off sequence (eg.
908 * disconnecting devices) failed.
909 */
910 hci_dev_do_close(hdev);
911 }
912 }
913 } else {
914 hci_dev_clear_flag(hdev, HCI_RFKILLED);
915 }
916
917 return 0;
918}
919
920static const struct rfkill_ops hci_rfkill_ops = {
921 .set_block = hci_rfkill_set_block,
922};
923
924static void hci_power_on(struct work_struct *work)
925{
926 struct hci_dev *hdev = container_of(work, struct hci_dev, power_on);
927 int err;
928
929 BT_DBG("%s", hdev->name);
930
931 if (test_bit(HCI_UP, &hdev->flags) &&
932 hci_dev_test_flag(hdev, HCI_MGMT) &&
933 hci_dev_test_and_clear_flag(hdev, HCI_AUTO_OFF)) {
934 cancel_delayed_work(&hdev->power_off);
935 err = hci_powered_update_sync(hdev);
936 mgmt_power_on(hdev, err);
937 return;
938 }
939
940 err = hci_dev_do_open(hdev);
941 if (err < 0) {
942 hci_dev_lock(hdev);
943 mgmt_set_powered_failed(hdev, err);
944 hci_dev_unlock(hdev);
945 return;
946 }
947
948 /* During the HCI setup phase, a few error conditions are
949 * ignored and they need to be checked now. If they are still
950 * valid, it is important to turn the device back off.
951 */
952 if (hci_dev_test_flag(hdev, HCI_RFKILLED) ||
953 hci_dev_test_flag(hdev, HCI_UNCONFIGURED) ||
954 (!bacmp(&hdev->bdaddr, BDADDR_ANY) &&
955 !bacmp(&hdev->static_addr, BDADDR_ANY))) {
956 hci_dev_clear_flag(hdev, HCI_AUTO_OFF);
957 hci_dev_do_close(hdev);
958 } else if (hci_dev_test_flag(hdev, HCI_AUTO_OFF)) {
959 queue_delayed_work(hdev->req_workqueue, &hdev->power_off,
960 HCI_AUTO_OFF_TIMEOUT);
961 }
962
963 if (hci_dev_test_and_clear_flag(hdev, HCI_SETUP)) {
964 /* For unconfigured devices, set the HCI_RAW flag
965 * so that userspace can easily identify them.
966 */
967 if (hci_dev_test_flag(hdev, HCI_UNCONFIGURED))
968 set_bit(HCI_RAW, &hdev->flags);
969
970 /* For fully configured devices, this will send
971 * the Index Added event. For unconfigured devices,
972 * it will send Unconfigued Index Added event.
973 *
974 * Devices with HCI_QUIRK_RAW_DEVICE are ignored
975 * and no event will be send.
976 */
977 mgmt_index_added(hdev);
978 } else if (hci_dev_test_and_clear_flag(hdev, HCI_CONFIG)) {
979 /* When the controller is now configured, then it
980 * is important to clear the HCI_RAW flag.
981 */
982 if (!hci_dev_test_flag(hdev, HCI_UNCONFIGURED))
983 clear_bit(HCI_RAW, &hdev->flags);
984
985 /* Powering on the controller with HCI_CONFIG set only
986 * happens with the transition from unconfigured to
987 * configured. This will send the Index Added event.
988 */
989 mgmt_index_added(hdev);
990 }
991}
992
993static void hci_power_off(struct work_struct *work)
994{
995 struct hci_dev *hdev = container_of(work, struct hci_dev,
996 power_off.work);
997
998 BT_DBG("%s", hdev->name);
999
1000 hci_dev_do_close(hdev);
1001}
1002
1003static void hci_error_reset(struct work_struct *work)
1004{
1005 struct hci_dev *hdev = container_of(work, struct hci_dev, error_reset);
1006
1007 hci_dev_hold(hdev);
1008 BT_DBG("%s", hdev->name);
1009
1010 if (hdev->hw_error)
1011 hdev->hw_error(hdev, hdev->hw_error_code);
1012 else
1013 bt_dev_err(hdev, "hardware error 0x%2.2x", hdev->hw_error_code);
1014
1015 if (!hci_dev_do_close(hdev))
1016 hci_dev_do_open(hdev);
1017
1018 hci_dev_put(hdev);
1019}
1020
1021void hci_uuids_clear(struct hci_dev *hdev)
1022{
1023 struct bt_uuid *uuid, *tmp;
1024
1025 list_for_each_entry_safe(uuid, tmp, &hdev->uuids, list) {
1026 list_del(&uuid->list);
1027 kfree(uuid);
1028 }
1029}
1030
1031void hci_link_keys_clear(struct hci_dev *hdev)
1032{
1033 struct link_key *key, *tmp;
1034
1035 list_for_each_entry_safe(key, tmp, &hdev->link_keys, list) {
1036 list_del_rcu(&key->list);
1037 kfree_rcu(key, rcu);
1038 }
1039}
1040
1041void hci_smp_ltks_clear(struct hci_dev *hdev)
1042{
1043 struct smp_ltk *k, *tmp;
1044
1045 list_for_each_entry_safe(k, tmp, &hdev->long_term_keys, list) {
1046 list_del_rcu(&k->list);
1047 kfree_rcu(k, rcu);
1048 }
1049}
1050
1051void hci_smp_irks_clear(struct hci_dev *hdev)
1052{
1053 struct smp_irk *k, *tmp;
1054
1055 list_for_each_entry_safe(k, tmp, &hdev->identity_resolving_keys, list) {
1056 list_del_rcu(&k->list);
1057 kfree_rcu(k, rcu);
1058 }
1059}
1060
1061void hci_blocked_keys_clear(struct hci_dev *hdev)
1062{
1063 struct blocked_key *b, *tmp;
1064
1065 list_for_each_entry_safe(b, tmp, &hdev->blocked_keys, list) {
1066 list_del_rcu(&b->list);
1067 kfree_rcu(b, rcu);
1068 }
1069}
1070
1071bool hci_is_blocked_key(struct hci_dev *hdev, u8 type, u8 val[16])
1072{
1073 bool blocked = false;
1074 struct blocked_key *b;
1075
1076 rcu_read_lock();
1077 list_for_each_entry_rcu(b, &hdev->blocked_keys, list) {
1078 if (b->type == type && !memcmp(b->val, val, sizeof(b->val))) {
1079 blocked = true;
1080 break;
1081 }
1082 }
1083
1084 rcu_read_unlock();
1085 return blocked;
1086}
1087
1088struct link_key *hci_find_link_key(struct hci_dev *hdev, bdaddr_t *bdaddr)
1089{
1090 struct link_key *k;
1091
1092 rcu_read_lock();
1093 list_for_each_entry_rcu(k, &hdev->link_keys, list) {
1094 if (bacmp(bdaddr, &k->bdaddr) == 0) {
1095 rcu_read_unlock();
1096
1097 if (hci_is_blocked_key(hdev,
1098 HCI_BLOCKED_KEY_TYPE_LINKKEY,
1099 k->val)) {
1100 bt_dev_warn_ratelimited(hdev,
1101 "Link key blocked for %pMR",
1102 &k->bdaddr);
1103 return NULL;
1104 }
1105
1106 return k;
1107 }
1108 }
1109 rcu_read_unlock();
1110
1111 return NULL;
1112}
1113
1114static bool hci_persistent_key(struct hci_dev *hdev, struct hci_conn *conn,
1115 u8 key_type, u8 old_key_type)
1116{
1117 /* Legacy key */
1118 if (key_type < 0x03)
1119 return true;
1120
1121 /* Debug keys are insecure so don't store them persistently */
1122 if (key_type == HCI_LK_DEBUG_COMBINATION)
1123 return false;
1124
1125 /* Changed combination key and there's no previous one */
1126 if (key_type == HCI_LK_CHANGED_COMBINATION && old_key_type == 0xff)
1127 return false;
1128
1129 /* Security mode 3 case */
1130 if (!conn)
1131 return true;
1132
1133 /* BR/EDR key derived using SC from an LE link */
1134 if (conn->type == LE_LINK)
1135 return true;
1136
1137 /* Neither local nor remote side had no-bonding as requirement */
1138 if (conn->auth_type > 0x01 && conn->remote_auth > 0x01)
1139 return true;
1140
1141 /* Local side had dedicated bonding as requirement */
1142 if (conn->auth_type == 0x02 || conn->auth_type == 0x03)
1143 return true;
1144
1145 /* Remote side had dedicated bonding as requirement */
1146 if (conn->remote_auth == 0x02 || conn->remote_auth == 0x03)
1147 return true;
1148
1149 /* If none of the above criteria match, then don't store the key
1150 * persistently */
1151 return false;
1152}
1153
1154static u8 ltk_role(u8 type)
1155{
1156 if (type == SMP_LTK)
1157 return HCI_ROLE_MASTER;
1158
1159 return HCI_ROLE_SLAVE;
1160}
1161
1162struct smp_ltk *hci_find_ltk(struct hci_dev *hdev, bdaddr_t *bdaddr,
1163 u8 addr_type, u8 role)
1164{
1165 struct smp_ltk *k;
1166
1167 rcu_read_lock();
1168 list_for_each_entry_rcu(k, &hdev->long_term_keys, list) {
1169 if (addr_type != k->bdaddr_type || bacmp(bdaddr, &k->bdaddr))
1170 continue;
1171
1172 if (smp_ltk_is_sc(k) || ltk_role(k->type) == role) {
1173 rcu_read_unlock();
1174
1175 if (hci_is_blocked_key(hdev, HCI_BLOCKED_KEY_TYPE_LTK,
1176 k->val)) {
1177 bt_dev_warn_ratelimited(hdev,
1178 "LTK blocked for %pMR",
1179 &k->bdaddr);
1180 return NULL;
1181 }
1182
1183 return k;
1184 }
1185 }
1186 rcu_read_unlock();
1187
1188 return NULL;
1189}
1190
1191struct smp_irk *hci_find_irk_by_rpa(struct hci_dev *hdev, bdaddr_t *rpa)
1192{
1193 struct smp_irk *irk_to_return = NULL;
1194 struct smp_irk *irk;
1195
1196 rcu_read_lock();
1197 list_for_each_entry_rcu(irk, &hdev->identity_resolving_keys, list) {
1198 if (!bacmp(&irk->rpa, rpa)) {
1199 irk_to_return = irk;
1200 goto done;
1201 }
1202 }
1203
1204 list_for_each_entry_rcu(irk, &hdev->identity_resolving_keys, list) {
1205 if (smp_irk_matches(hdev, irk->val, rpa)) {
1206 bacpy(&irk->rpa, rpa);
1207 irk_to_return = irk;
1208 goto done;
1209 }
1210 }
1211
1212done:
1213 if (irk_to_return && hci_is_blocked_key(hdev, HCI_BLOCKED_KEY_TYPE_IRK,
1214 irk_to_return->val)) {
1215 bt_dev_warn_ratelimited(hdev, "Identity key blocked for %pMR",
1216 &irk_to_return->bdaddr);
1217 irk_to_return = NULL;
1218 }
1219
1220 rcu_read_unlock();
1221
1222 return irk_to_return;
1223}
1224
1225struct smp_irk *hci_find_irk_by_addr(struct hci_dev *hdev, bdaddr_t *bdaddr,
1226 u8 addr_type)
1227{
1228 struct smp_irk *irk_to_return = NULL;
1229 struct smp_irk *irk;
1230
1231 /* Identity Address must be public or static random */
1232 if (addr_type == ADDR_LE_DEV_RANDOM && (bdaddr->b[5] & 0xc0) != 0xc0)
1233 return NULL;
1234
1235 rcu_read_lock();
1236 list_for_each_entry_rcu(irk, &hdev->identity_resolving_keys, list) {
1237 if (addr_type == irk->addr_type &&
1238 bacmp(bdaddr, &irk->bdaddr) == 0) {
1239 irk_to_return = irk;
1240 goto done;
1241 }
1242 }
1243
1244done:
1245
1246 if (irk_to_return && hci_is_blocked_key(hdev, HCI_BLOCKED_KEY_TYPE_IRK,
1247 irk_to_return->val)) {
1248 bt_dev_warn_ratelimited(hdev, "Identity key blocked for %pMR",
1249 &irk_to_return->bdaddr);
1250 irk_to_return = NULL;
1251 }
1252
1253 rcu_read_unlock();
1254
1255 return irk_to_return;
1256}
1257
1258struct link_key *hci_add_link_key(struct hci_dev *hdev, struct hci_conn *conn,
1259 bdaddr_t *bdaddr, u8 *val, u8 type,
1260 u8 pin_len, bool *persistent)
1261{
1262 struct link_key *key, *old_key;
1263 u8 old_key_type;
1264
1265 old_key = hci_find_link_key(hdev, bdaddr);
1266 if (old_key) {
1267 old_key_type = old_key->type;
1268 key = old_key;
1269 } else {
1270 old_key_type = conn ? conn->key_type : 0xff;
1271 key = kzalloc(sizeof(*key), GFP_KERNEL);
1272 if (!key)
1273 return NULL;
1274 list_add_rcu(&key->list, &hdev->link_keys);
1275 }
1276
1277 BT_DBG("%s key for %pMR type %u", hdev->name, bdaddr, type);
1278
1279 /* Some buggy controller combinations generate a changed
1280 * combination key for legacy pairing even when there's no
1281 * previous key */
1282 if (type == HCI_LK_CHANGED_COMBINATION &&
1283 (!conn || conn->remote_auth == 0xff) && old_key_type == 0xff) {
1284 type = HCI_LK_COMBINATION;
1285 if (conn)
1286 conn->key_type = type;
1287 }
1288
1289 bacpy(&key->bdaddr, bdaddr);
1290 memcpy(key->val, val, HCI_LINK_KEY_SIZE);
1291 key->pin_len = pin_len;
1292
1293 if (type == HCI_LK_CHANGED_COMBINATION)
1294 key->type = old_key_type;
1295 else
1296 key->type = type;
1297
1298 if (persistent)
1299 *persistent = hci_persistent_key(hdev, conn, type,
1300 old_key_type);
1301
1302 return key;
1303}
1304
1305struct smp_ltk *hci_add_ltk(struct hci_dev *hdev, bdaddr_t *bdaddr,
1306 u8 addr_type, u8 type, u8 authenticated,
1307 u8 tk[16], u8 enc_size, __le16 ediv, __le64 rand)
1308{
1309 struct smp_ltk *key, *old_key;
1310 u8 role = ltk_role(type);
1311
1312 old_key = hci_find_ltk(hdev, bdaddr, addr_type, role);
1313 if (old_key)
1314 key = old_key;
1315 else {
1316 key = kzalloc(sizeof(*key), GFP_KERNEL);
1317 if (!key)
1318 return NULL;
1319 list_add_rcu(&key->list, &hdev->long_term_keys);
1320 }
1321
1322 bacpy(&key->bdaddr, bdaddr);
1323 key->bdaddr_type = addr_type;
1324 memcpy(key->val, tk, sizeof(key->val));
1325 key->authenticated = authenticated;
1326 key->ediv = ediv;
1327 key->rand = rand;
1328 key->enc_size = enc_size;
1329 key->type = type;
1330
1331 return key;
1332}
1333
1334struct smp_irk *hci_add_irk(struct hci_dev *hdev, bdaddr_t *bdaddr,
1335 u8 addr_type, u8 val[16], bdaddr_t *rpa)
1336{
1337 struct smp_irk *irk;
1338
1339 irk = hci_find_irk_by_addr(hdev, bdaddr, addr_type);
1340 if (!irk) {
1341 irk = kzalloc(sizeof(*irk), GFP_KERNEL);
1342 if (!irk)
1343 return NULL;
1344
1345 bacpy(&irk->bdaddr, bdaddr);
1346 irk->addr_type = addr_type;
1347
1348 list_add_rcu(&irk->list, &hdev->identity_resolving_keys);
1349 }
1350
1351 memcpy(irk->val, val, 16);
1352 bacpy(&irk->rpa, rpa);
1353
1354 return irk;
1355}
1356
1357int hci_remove_link_key(struct hci_dev *hdev, bdaddr_t *bdaddr)
1358{
1359 struct link_key *key;
1360
1361 key = hci_find_link_key(hdev, bdaddr);
1362 if (!key)
1363 return -ENOENT;
1364
1365 BT_DBG("%s removing %pMR", hdev->name, bdaddr);
1366
1367 list_del_rcu(&key->list);
1368 kfree_rcu(key, rcu);
1369
1370 return 0;
1371}
1372
1373int hci_remove_ltk(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 bdaddr_type)
1374{
1375 struct smp_ltk *k, *tmp;
1376 int removed = 0;
1377
1378 list_for_each_entry_safe(k, tmp, &hdev->long_term_keys, list) {
1379 if (bacmp(bdaddr, &k->bdaddr) || k->bdaddr_type != bdaddr_type)
1380 continue;
1381
1382 BT_DBG("%s removing %pMR", hdev->name, bdaddr);
1383
1384 list_del_rcu(&k->list);
1385 kfree_rcu(k, rcu);
1386 removed++;
1387 }
1388
1389 return removed ? 0 : -ENOENT;
1390}
1391
1392void hci_remove_irk(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 addr_type)
1393{
1394 struct smp_irk *k, *tmp;
1395
1396 list_for_each_entry_safe(k, tmp, &hdev->identity_resolving_keys, list) {
1397 if (bacmp(bdaddr, &k->bdaddr) || k->addr_type != addr_type)
1398 continue;
1399
1400 BT_DBG("%s removing %pMR", hdev->name, bdaddr);
1401
1402 list_del_rcu(&k->list);
1403 kfree_rcu(k, rcu);
1404 }
1405}
1406
1407bool hci_bdaddr_is_paired(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 type)
1408{
1409 struct smp_ltk *k;
1410 struct smp_irk *irk;
1411 u8 addr_type;
1412
1413 if (type == BDADDR_BREDR) {
1414 if (hci_find_link_key(hdev, bdaddr))
1415 return true;
1416 return false;
1417 }
1418
1419 /* Convert to HCI addr type which struct smp_ltk uses */
1420 if (type == BDADDR_LE_PUBLIC)
1421 addr_type = ADDR_LE_DEV_PUBLIC;
1422 else
1423 addr_type = ADDR_LE_DEV_RANDOM;
1424
1425 irk = hci_get_irk(hdev, bdaddr, addr_type);
1426 if (irk) {
1427 bdaddr = &irk->bdaddr;
1428 addr_type = irk->addr_type;
1429 }
1430
1431 rcu_read_lock();
1432 list_for_each_entry_rcu(k, &hdev->long_term_keys, list) {
1433 if (k->bdaddr_type == addr_type && !bacmp(bdaddr, &k->bdaddr)) {
1434 rcu_read_unlock();
1435 return true;
1436 }
1437 }
1438 rcu_read_unlock();
1439
1440 return false;
1441}
1442
1443/* HCI command timer function */
1444static void hci_cmd_timeout(struct work_struct *work)
1445{
1446 struct hci_dev *hdev = container_of(work, struct hci_dev,
1447 cmd_timer.work);
1448
1449 if (hdev->req_skb) {
1450 u16 opcode = hci_skb_opcode(hdev->req_skb);
1451
1452 bt_dev_err(hdev, "command 0x%4.4x tx timeout", opcode);
1453
1454 hci_cmd_sync_cancel_sync(hdev, ETIMEDOUT);
1455 } else {
1456 bt_dev_err(hdev, "command tx timeout");
1457 }
1458
1459 if (hdev->cmd_timeout)
1460 hdev->cmd_timeout(hdev);
1461
1462 atomic_set(&hdev->cmd_cnt, 1);
1463 queue_work(hdev->workqueue, &hdev->cmd_work);
1464}
1465
1466/* HCI ncmd timer function */
1467static void hci_ncmd_timeout(struct work_struct *work)
1468{
1469 struct hci_dev *hdev = container_of(work, struct hci_dev,
1470 ncmd_timer.work);
1471
1472 bt_dev_err(hdev, "Controller not accepting commands anymore: ncmd = 0");
1473
1474 /* During HCI_INIT phase no events can be injected if the ncmd timer
1475 * triggers since the procedure has its own timeout handling.
1476 */
1477 if (test_bit(HCI_INIT, &hdev->flags))
1478 return;
1479
1480 /* This is an irrecoverable state, inject hardware error event */
1481 hci_reset_dev(hdev);
1482}
1483
1484struct oob_data *hci_find_remote_oob_data(struct hci_dev *hdev,
1485 bdaddr_t *bdaddr, u8 bdaddr_type)
1486{
1487 struct oob_data *data;
1488
1489 list_for_each_entry(data, &hdev->remote_oob_data, list) {
1490 if (bacmp(bdaddr, &data->bdaddr) != 0)
1491 continue;
1492 if (data->bdaddr_type != bdaddr_type)
1493 continue;
1494 return data;
1495 }
1496
1497 return NULL;
1498}
1499
1500int hci_remove_remote_oob_data(struct hci_dev *hdev, bdaddr_t *bdaddr,
1501 u8 bdaddr_type)
1502{
1503 struct oob_data *data;
1504
1505 data = hci_find_remote_oob_data(hdev, bdaddr, bdaddr_type);
1506 if (!data)
1507 return -ENOENT;
1508
1509 BT_DBG("%s removing %pMR (%u)", hdev->name, bdaddr, bdaddr_type);
1510
1511 list_del(&data->list);
1512 kfree(data);
1513
1514 return 0;
1515}
1516
1517void hci_remote_oob_data_clear(struct hci_dev *hdev)
1518{
1519 struct oob_data *data, *n;
1520
1521 list_for_each_entry_safe(data, n, &hdev->remote_oob_data, list) {
1522 list_del(&data->list);
1523 kfree(data);
1524 }
1525}
1526
1527int hci_add_remote_oob_data(struct hci_dev *hdev, bdaddr_t *bdaddr,
1528 u8 bdaddr_type, u8 *hash192, u8 *rand192,
1529 u8 *hash256, u8 *rand256)
1530{
1531 struct oob_data *data;
1532
1533 data = hci_find_remote_oob_data(hdev, bdaddr, bdaddr_type);
1534 if (!data) {
1535 data = kmalloc(sizeof(*data), GFP_KERNEL);
1536 if (!data)
1537 return -ENOMEM;
1538
1539 bacpy(&data->bdaddr, bdaddr);
1540 data->bdaddr_type = bdaddr_type;
1541 list_add(&data->list, &hdev->remote_oob_data);
1542 }
1543
1544 if (hash192 && rand192) {
1545 memcpy(data->hash192, hash192, sizeof(data->hash192));
1546 memcpy(data->rand192, rand192, sizeof(data->rand192));
1547 if (hash256 && rand256)
1548 data->present = 0x03;
1549 } else {
1550 memset(data->hash192, 0, sizeof(data->hash192));
1551 memset(data->rand192, 0, sizeof(data->rand192));
1552 if (hash256 && rand256)
1553 data->present = 0x02;
1554 else
1555 data->present = 0x00;
1556 }
1557
1558 if (hash256 && rand256) {
1559 memcpy(data->hash256, hash256, sizeof(data->hash256));
1560 memcpy(data->rand256, rand256, sizeof(data->rand256));
1561 } else {
1562 memset(data->hash256, 0, sizeof(data->hash256));
1563 memset(data->rand256, 0, sizeof(data->rand256));
1564 if (hash192 && rand192)
1565 data->present = 0x01;
1566 }
1567
1568 BT_DBG("%s for %pMR", hdev->name, bdaddr);
1569
1570 return 0;
1571}
1572
1573/* This function requires the caller holds hdev->lock */
1574struct adv_info *hci_find_adv_instance(struct hci_dev *hdev, u8 instance)
1575{
1576 struct adv_info *adv_instance;
1577
1578 list_for_each_entry(adv_instance, &hdev->adv_instances, list) {
1579 if (adv_instance->instance == instance)
1580 return adv_instance;
1581 }
1582
1583 return NULL;
1584}
1585
1586/* This function requires the caller holds hdev->lock */
1587struct adv_info *hci_get_next_instance(struct hci_dev *hdev, u8 instance)
1588{
1589 struct adv_info *cur_instance;
1590
1591 cur_instance = hci_find_adv_instance(hdev, instance);
1592 if (!cur_instance)
1593 return NULL;
1594
1595 if (cur_instance == list_last_entry(&hdev->adv_instances,
1596 struct adv_info, list))
1597 return list_first_entry(&hdev->adv_instances,
1598 struct adv_info, list);
1599 else
1600 return list_next_entry(cur_instance, list);
1601}
1602
1603/* This function requires the caller holds hdev->lock */
1604int hci_remove_adv_instance(struct hci_dev *hdev, u8 instance)
1605{
1606 struct adv_info *adv_instance;
1607
1608 adv_instance = hci_find_adv_instance(hdev, instance);
1609 if (!adv_instance)
1610 return -ENOENT;
1611
1612 BT_DBG("%s removing %dMR", hdev->name, instance);
1613
1614 if (hdev->cur_adv_instance == instance) {
1615 if (hdev->adv_instance_timeout) {
1616 cancel_delayed_work(&hdev->adv_instance_expire);
1617 hdev->adv_instance_timeout = 0;
1618 }
1619 hdev->cur_adv_instance = 0x00;
1620 }
1621
1622 cancel_delayed_work_sync(&adv_instance->rpa_expired_cb);
1623
1624 list_del(&adv_instance->list);
1625 kfree(adv_instance);
1626
1627 hdev->adv_instance_cnt--;
1628
1629 return 0;
1630}
1631
1632void hci_adv_instances_set_rpa_expired(struct hci_dev *hdev, bool rpa_expired)
1633{
1634 struct adv_info *adv_instance, *n;
1635
1636 list_for_each_entry_safe(adv_instance, n, &hdev->adv_instances, list)
1637 adv_instance->rpa_expired = rpa_expired;
1638}
1639
1640/* This function requires the caller holds hdev->lock */
1641void hci_adv_instances_clear(struct hci_dev *hdev)
1642{
1643 struct adv_info *adv_instance, *n;
1644
1645 if (hdev->adv_instance_timeout) {
1646 disable_delayed_work(&hdev->adv_instance_expire);
1647 hdev->adv_instance_timeout = 0;
1648 }
1649
1650 list_for_each_entry_safe(adv_instance, n, &hdev->adv_instances, list) {
1651 disable_delayed_work_sync(&adv_instance->rpa_expired_cb);
1652 list_del(&adv_instance->list);
1653 kfree(adv_instance);
1654 }
1655
1656 hdev->adv_instance_cnt = 0;
1657 hdev->cur_adv_instance = 0x00;
1658}
1659
1660static void adv_instance_rpa_expired(struct work_struct *work)
1661{
1662 struct adv_info *adv_instance = container_of(work, struct adv_info,
1663 rpa_expired_cb.work);
1664
1665 BT_DBG("");
1666
1667 adv_instance->rpa_expired = true;
1668}
1669
1670/* This function requires the caller holds hdev->lock */
1671struct adv_info *hci_add_adv_instance(struct hci_dev *hdev, u8 instance,
1672 u32 flags, u16 adv_data_len, u8 *adv_data,
1673 u16 scan_rsp_len, u8 *scan_rsp_data,
1674 u16 timeout, u16 duration, s8 tx_power,
1675 u32 min_interval, u32 max_interval,
1676 u8 mesh_handle)
1677{
1678 struct adv_info *adv;
1679
1680 adv = hci_find_adv_instance(hdev, instance);
1681 if (adv) {
1682 memset(adv->adv_data, 0, sizeof(adv->adv_data));
1683 memset(adv->scan_rsp_data, 0, sizeof(adv->scan_rsp_data));
1684 memset(adv->per_adv_data, 0, sizeof(adv->per_adv_data));
1685 } else {
1686 if (hdev->adv_instance_cnt >= hdev->le_num_of_adv_sets ||
1687 instance < 1 || instance > hdev->le_num_of_adv_sets + 1)
1688 return ERR_PTR(-EOVERFLOW);
1689
1690 adv = kzalloc(sizeof(*adv), GFP_KERNEL);
1691 if (!adv)
1692 return ERR_PTR(-ENOMEM);
1693
1694 adv->pending = true;
1695 adv->instance = instance;
1696
1697 /* If controller support only one set and the instance is set to
1698 * 1 then there is no option other than using handle 0x00.
1699 */
1700 if (hdev->le_num_of_adv_sets == 1 && instance == 1)
1701 adv->handle = 0x00;
1702 else
1703 adv->handle = instance;
1704
1705 list_add(&adv->list, &hdev->adv_instances);
1706 hdev->adv_instance_cnt++;
1707 }
1708
1709 adv->flags = flags;
1710 adv->min_interval = min_interval;
1711 adv->max_interval = max_interval;
1712 adv->tx_power = tx_power;
1713 /* Defining a mesh_handle changes the timing units to ms,
1714 * rather than seconds, and ties the instance to the requested
1715 * mesh_tx queue.
1716 */
1717 adv->mesh = mesh_handle;
1718
1719 hci_set_adv_instance_data(hdev, instance, adv_data_len, adv_data,
1720 scan_rsp_len, scan_rsp_data);
1721
1722 adv->timeout = timeout;
1723 adv->remaining_time = timeout;
1724
1725 if (duration == 0)
1726 adv->duration = hdev->def_multi_adv_rotation_duration;
1727 else
1728 adv->duration = duration;
1729
1730 INIT_DELAYED_WORK(&adv->rpa_expired_cb, adv_instance_rpa_expired);
1731
1732 BT_DBG("%s for %dMR", hdev->name, instance);
1733
1734 return adv;
1735}
1736
1737/* This function requires the caller holds hdev->lock */
1738struct adv_info *hci_add_per_instance(struct hci_dev *hdev, u8 instance,
1739 u32 flags, u8 data_len, u8 *data,
1740 u32 min_interval, u32 max_interval)
1741{
1742 struct adv_info *adv;
1743
1744 adv = hci_add_adv_instance(hdev, instance, flags, 0, NULL, 0, NULL,
1745 0, 0, HCI_ADV_TX_POWER_NO_PREFERENCE,
1746 min_interval, max_interval, 0);
1747 if (IS_ERR(adv))
1748 return adv;
1749
1750 adv->periodic = true;
1751 adv->per_adv_data_len = data_len;
1752
1753 if (data)
1754 memcpy(adv->per_adv_data, data, data_len);
1755
1756 return adv;
1757}
1758
1759/* This function requires the caller holds hdev->lock */
1760int hci_set_adv_instance_data(struct hci_dev *hdev, u8 instance,
1761 u16 adv_data_len, u8 *adv_data,
1762 u16 scan_rsp_len, u8 *scan_rsp_data)
1763{
1764 struct adv_info *adv;
1765
1766 adv = hci_find_adv_instance(hdev, instance);
1767
1768 /* If advertisement doesn't exist, we can't modify its data */
1769 if (!adv)
1770 return -ENOENT;
1771
1772 if (adv_data_len && ADV_DATA_CMP(adv, adv_data, adv_data_len)) {
1773 memset(adv->adv_data, 0, sizeof(adv->adv_data));
1774 memcpy(adv->adv_data, adv_data, adv_data_len);
1775 adv->adv_data_len = adv_data_len;
1776 adv->adv_data_changed = true;
1777 }
1778
1779 if (scan_rsp_len && SCAN_RSP_CMP(adv, scan_rsp_data, scan_rsp_len)) {
1780 memset(adv->scan_rsp_data, 0, sizeof(adv->scan_rsp_data));
1781 memcpy(adv->scan_rsp_data, scan_rsp_data, scan_rsp_len);
1782 adv->scan_rsp_len = scan_rsp_len;
1783 adv->scan_rsp_changed = true;
1784 }
1785
1786 /* Mark as changed if there are flags which would affect it */
1787 if (((adv->flags & MGMT_ADV_FLAG_APPEARANCE) && hdev->appearance) ||
1788 adv->flags & MGMT_ADV_FLAG_LOCAL_NAME)
1789 adv->scan_rsp_changed = true;
1790
1791 return 0;
1792}
1793
1794/* This function requires the caller holds hdev->lock */
1795u32 hci_adv_instance_flags(struct hci_dev *hdev, u8 instance)
1796{
1797 u32 flags;
1798 struct adv_info *adv;
1799
1800 if (instance == 0x00) {
1801 /* Instance 0 always manages the "Tx Power" and "Flags"
1802 * fields
1803 */
1804 flags = MGMT_ADV_FLAG_TX_POWER | MGMT_ADV_FLAG_MANAGED_FLAGS;
1805
1806 /* For instance 0, the HCI_ADVERTISING_CONNECTABLE setting
1807 * corresponds to the "connectable" instance flag.
1808 */
1809 if (hci_dev_test_flag(hdev, HCI_ADVERTISING_CONNECTABLE))
1810 flags |= MGMT_ADV_FLAG_CONNECTABLE;
1811
1812 if (hci_dev_test_flag(hdev, HCI_LIMITED_DISCOVERABLE))
1813 flags |= MGMT_ADV_FLAG_LIMITED_DISCOV;
1814 else if (hci_dev_test_flag(hdev, HCI_DISCOVERABLE))
1815 flags |= MGMT_ADV_FLAG_DISCOV;
1816
1817 return flags;
1818 }
1819
1820 adv = hci_find_adv_instance(hdev, instance);
1821
1822 /* Return 0 when we got an invalid instance identifier. */
1823 if (!adv)
1824 return 0;
1825
1826 return adv->flags;
1827}
1828
1829bool hci_adv_instance_is_scannable(struct hci_dev *hdev, u8 instance)
1830{
1831 struct adv_info *adv;
1832
1833 /* Instance 0x00 always set local name */
1834 if (instance == 0x00)
1835 return true;
1836
1837 adv = hci_find_adv_instance(hdev, instance);
1838 if (!adv)
1839 return false;
1840
1841 if (adv->flags & MGMT_ADV_FLAG_APPEARANCE ||
1842 adv->flags & MGMT_ADV_FLAG_LOCAL_NAME)
1843 return true;
1844
1845 return adv->scan_rsp_len ? true : false;
1846}
1847
1848/* This function requires the caller holds hdev->lock */
1849void hci_adv_monitors_clear(struct hci_dev *hdev)
1850{
1851 struct adv_monitor *monitor;
1852 int handle;
1853
1854 idr_for_each_entry(&hdev->adv_monitors_idr, monitor, handle)
1855 hci_free_adv_monitor(hdev, monitor);
1856
1857 idr_destroy(&hdev->adv_monitors_idr);
1858}
1859
1860/* Frees the monitor structure and do some bookkeepings.
1861 * This function requires the caller holds hdev->lock.
1862 */
1863void hci_free_adv_monitor(struct hci_dev *hdev, struct adv_monitor *monitor)
1864{
1865 struct adv_pattern *pattern;
1866 struct adv_pattern *tmp;
1867
1868 if (!monitor)
1869 return;
1870
1871 list_for_each_entry_safe(pattern, tmp, &monitor->patterns, list) {
1872 list_del(&pattern->list);
1873 kfree(pattern);
1874 }
1875
1876 if (monitor->handle)
1877 idr_remove(&hdev->adv_monitors_idr, monitor->handle);
1878
1879 if (monitor->state != ADV_MONITOR_STATE_NOT_REGISTERED) {
1880 hdev->adv_monitors_cnt--;
1881 mgmt_adv_monitor_removed(hdev, monitor->handle);
1882 }
1883
1884 kfree(monitor);
1885}
1886
1887/* Assigns handle to a monitor, and if offloading is supported and power is on,
1888 * also attempts to forward the request to the controller.
1889 * This function requires the caller holds hci_req_sync_lock.
1890 */
1891int hci_add_adv_monitor(struct hci_dev *hdev, struct adv_monitor *monitor)
1892{
1893 int min, max, handle;
1894 int status = 0;
1895
1896 if (!monitor)
1897 return -EINVAL;
1898
1899 hci_dev_lock(hdev);
1900
1901 min = HCI_MIN_ADV_MONITOR_HANDLE;
1902 max = HCI_MIN_ADV_MONITOR_HANDLE + HCI_MAX_ADV_MONITOR_NUM_HANDLES;
1903 handle = idr_alloc(&hdev->adv_monitors_idr, monitor, min, max,
1904 GFP_KERNEL);
1905
1906 hci_dev_unlock(hdev);
1907
1908 if (handle < 0)
1909 return handle;
1910
1911 monitor->handle = handle;
1912
1913 if (!hdev_is_powered(hdev))
1914 return status;
1915
1916 switch (hci_get_adv_monitor_offload_ext(hdev)) {
1917 case HCI_ADV_MONITOR_EXT_NONE:
1918 bt_dev_dbg(hdev, "add monitor %d status %d",
1919 monitor->handle, status);
1920 /* Message was not forwarded to controller - not an error */
1921 break;
1922
1923 case HCI_ADV_MONITOR_EXT_MSFT:
1924 status = msft_add_monitor_pattern(hdev, monitor);
1925 bt_dev_dbg(hdev, "add monitor %d msft status %d",
1926 handle, status);
1927 break;
1928 }
1929
1930 return status;
1931}
1932
1933/* Attempts to tell the controller and free the monitor. If somehow the
1934 * controller doesn't have a corresponding handle, remove anyway.
1935 * This function requires the caller holds hci_req_sync_lock.
1936 */
1937static int hci_remove_adv_monitor(struct hci_dev *hdev,
1938 struct adv_monitor *monitor)
1939{
1940 int status = 0;
1941 int handle;
1942
1943 switch (hci_get_adv_monitor_offload_ext(hdev)) {
1944 case HCI_ADV_MONITOR_EXT_NONE: /* also goes here when powered off */
1945 bt_dev_dbg(hdev, "remove monitor %d status %d",
1946 monitor->handle, status);
1947 goto free_monitor;
1948
1949 case HCI_ADV_MONITOR_EXT_MSFT:
1950 handle = monitor->handle;
1951 status = msft_remove_monitor(hdev, monitor);
1952 bt_dev_dbg(hdev, "remove monitor %d msft status %d",
1953 handle, status);
1954 break;
1955 }
1956
1957 /* In case no matching handle registered, just free the monitor */
1958 if (status == -ENOENT)
1959 goto free_monitor;
1960
1961 return status;
1962
1963free_monitor:
1964 if (status == -ENOENT)
1965 bt_dev_warn(hdev, "Removing monitor with no matching handle %d",
1966 monitor->handle);
1967 hci_free_adv_monitor(hdev, monitor);
1968
1969 return status;
1970}
1971
1972/* This function requires the caller holds hci_req_sync_lock */
1973int hci_remove_single_adv_monitor(struct hci_dev *hdev, u16 handle)
1974{
1975 struct adv_monitor *monitor = idr_find(&hdev->adv_monitors_idr, handle);
1976
1977 if (!monitor)
1978 return -EINVAL;
1979
1980 return hci_remove_adv_monitor(hdev, monitor);
1981}
1982
1983/* This function requires the caller holds hci_req_sync_lock */
1984int hci_remove_all_adv_monitor(struct hci_dev *hdev)
1985{
1986 struct adv_monitor *monitor;
1987 int idr_next_id = 0;
1988 int status = 0;
1989
1990 while (1) {
1991 monitor = idr_get_next(&hdev->adv_monitors_idr, &idr_next_id);
1992 if (!monitor)
1993 break;
1994
1995 status = hci_remove_adv_monitor(hdev, monitor);
1996 if (status)
1997 return status;
1998
1999 idr_next_id++;
2000 }
2001
2002 return status;
2003}
2004
2005/* This function requires the caller holds hdev->lock */
2006bool hci_is_adv_monitoring(struct hci_dev *hdev)
2007{
2008 return !idr_is_empty(&hdev->adv_monitors_idr);
2009}
2010
2011int hci_get_adv_monitor_offload_ext(struct hci_dev *hdev)
2012{
2013 if (msft_monitor_supported(hdev))
2014 return HCI_ADV_MONITOR_EXT_MSFT;
2015
2016 return HCI_ADV_MONITOR_EXT_NONE;
2017}
2018
2019struct bdaddr_list *hci_bdaddr_list_lookup(struct list_head *bdaddr_list,
2020 bdaddr_t *bdaddr, u8 type)
2021{
2022 struct bdaddr_list *b;
2023
2024 list_for_each_entry(b, bdaddr_list, list) {
2025 if (!bacmp(&b->bdaddr, bdaddr) && b->bdaddr_type == type)
2026 return b;
2027 }
2028
2029 return NULL;
2030}
2031
2032struct bdaddr_list_with_irk *hci_bdaddr_list_lookup_with_irk(
2033 struct list_head *bdaddr_list, bdaddr_t *bdaddr,
2034 u8 type)
2035{
2036 struct bdaddr_list_with_irk *b;
2037
2038 list_for_each_entry(b, bdaddr_list, list) {
2039 if (!bacmp(&b->bdaddr, bdaddr) && b->bdaddr_type == type)
2040 return b;
2041 }
2042
2043 return NULL;
2044}
2045
2046struct bdaddr_list_with_flags *
2047hci_bdaddr_list_lookup_with_flags(struct list_head *bdaddr_list,
2048 bdaddr_t *bdaddr, u8 type)
2049{
2050 struct bdaddr_list_with_flags *b;
2051
2052 list_for_each_entry(b, bdaddr_list, list) {
2053 if (!bacmp(&b->bdaddr, bdaddr) && b->bdaddr_type == type)
2054 return b;
2055 }
2056
2057 return NULL;
2058}
2059
2060void hci_bdaddr_list_clear(struct list_head *bdaddr_list)
2061{
2062 struct bdaddr_list *b, *n;
2063
2064 list_for_each_entry_safe(b, n, bdaddr_list, list) {
2065 list_del(&b->list);
2066 kfree(b);
2067 }
2068}
2069
2070int hci_bdaddr_list_add(struct list_head *list, bdaddr_t *bdaddr, u8 type)
2071{
2072 struct bdaddr_list *entry;
2073
2074 if (!bacmp(bdaddr, BDADDR_ANY))
2075 return -EBADF;
2076
2077 if (hci_bdaddr_list_lookup(list, bdaddr, type))
2078 return -EEXIST;
2079
2080 entry = kzalloc(sizeof(*entry), GFP_KERNEL);
2081 if (!entry)
2082 return -ENOMEM;
2083
2084 bacpy(&entry->bdaddr, bdaddr);
2085 entry->bdaddr_type = type;
2086
2087 list_add(&entry->list, list);
2088
2089 return 0;
2090}
2091
2092int hci_bdaddr_list_add_with_irk(struct list_head *list, bdaddr_t *bdaddr,
2093 u8 type, u8 *peer_irk, u8 *local_irk)
2094{
2095 struct bdaddr_list_with_irk *entry;
2096
2097 if (!bacmp(bdaddr, BDADDR_ANY))
2098 return -EBADF;
2099
2100 if (hci_bdaddr_list_lookup(list, bdaddr, type))
2101 return -EEXIST;
2102
2103 entry = kzalloc(sizeof(*entry), GFP_KERNEL);
2104 if (!entry)
2105 return -ENOMEM;
2106
2107 bacpy(&entry->bdaddr, bdaddr);
2108 entry->bdaddr_type = type;
2109
2110 if (peer_irk)
2111 memcpy(entry->peer_irk, peer_irk, 16);
2112
2113 if (local_irk)
2114 memcpy(entry->local_irk, local_irk, 16);
2115
2116 list_add(&entry->list, list);
2117
2118 return 0;
2119}
2120
2121int hci_bdaddr_list_add_with_flags(struct list_head *list, bdaddr_t *bdaddr,
2122 u8 type, u32 flags)
2123{
2124 struct bdaddr_list_with_flags *entry;
2125
2126 if (!bacmp(bdaddr, BDADDR_ANY))
2127 return -EBADF;
2128
2129 if (hci_bdaddr_list_lookup(list, bdaddr, type))
2130 return -EEXIST;
2131
2132 entry = kzalloc(sizeof(*entry), GFP_KERNEL);
2133 if (!entry)
2134 return -ENOMEM;
2135
2136 bacpy(&entry->bdaddr, bdaddr);
2137 entry->bdaddr_type = type;
2138 entry->flags = flags;
2139
2140 list_add(&entry->list, list);
2141
2142 return 0;
2143}
2144
2145int hci_bdaddr_list_del(struct list_head *list, bdaddr_t *bdaddr, u8 type)
2146{
2147 struct bdaddr_list *entry;
2148
2149 if (!bacmp(bdaddr, BDADDR_ANY)) {
2150 hci_bdaddr_list_clear(list);
2151 return 0;
2152 }
2153
2154 entry = hci_bdaddr_list_lookup(list, bdaddr, type);
2155 if (!entry)
2156 return -ENOENT;
2157
2158 list_del(&entry->list);
2159 kfree(entry);
2160
2161 return 0;
2162}
2163
2164int hci_bdaddr_list_del_with_irk(struct list_head *list, bdaddr_t *bdaddr,
2165 u8 type)
2166{
2167 struct bdaddr_list_with_irk *entry;
2168
2169 if (!bacmp(bdaddr, BDADDR_ANY)) {
2170 hci_bdaddr_list_clear(list);
2171 return 0;
2172 }
2173
2174 entry = hci_bdaddr_list_lookup_with_irk(list, bdaddr, type);
2175 if (!entry)
2176 return -ENOENT;
2177
2178 list_del(&entry->list);
2179 kfree(entry);
2180
2181 return 0;
2182}
2183
2184int hci_bdaddr_list_del_with_flags(struct list_head *list, bdaddr_t *bdaddr,
2185 u8 type)
2186{
2187 struct bdaddr_list_with_flags *entry;
2188
2189 if (!bacmp(bdaddr, BDADDR_ANY)) {
2190 hci_bdaddr_list_clear(list);
2191 return 0;
2192 }
2193
2194 entry = hci_bdaddr_list_lookup_with_flags(list, bdaddr, type);
2195 if (!entry)
2196 return -ENOENT;
2197
2198 list_del(&entry->list);
2199 kfree(entry);
2200
2201 return 0;
2202}
2203
2204/* This function requires the caller holds hdev->lock */
2205struct hci_conn_params *hci_conn_params_lookup(struct hci_dev *hdev,
2206 bdaddr_t *addr, u8 addr_type)
2207{
2208 struct hci_conn_params *params;
2209
2210 list_for_each_entry(params, &hdev->le_conn_params, list) {
2211 if (bacmp(¶ms->addr, addr) == 0 &&
2212 params->addr_type == addr_type) {
2213 return params;
2214 }
2215 }
2216
2217 return NULL;
2218}
2219
2220/* This function requires the caller holds hdev->lock or rcu_read_lock */
2221struct hci_conn_params *hci_pend_le_action_lookup(struct list_head *list,
2222 bdaddr_t *addr, u8 addr_type)
2223{
2224 struct hci_conn_params *param;
2225
2226 rcu_read_lock();
2227
2228 list_for_each_entry_rcu(param, list, action) {
2229 if (bacmp(¶m->addr, addr) == 0 &&
2230 param->addr_type == addr_type) {
2231 rcu_read_unlock();
2232 return param;
2233 }
2234 }
2235
2236 rcu_read_unlock();
2237
2238 return NULL;
2239}
2240
2241/* This function requires the caller holds hdev->lock */
2242void hci_pend_le_list_del_init(struct hci_conn_params *param)
2243{
2244 if (list_empty(¶m->action))
2245 return;
2246
2247 list_del_rcu(¶m->action);
2248 synchronize_rcu();
2249 INIT_LIST_HEAD(¶m->action);
2250}
2251
2252/* This function requires the caller holds hdev->lock */
2253void hci_pend_le_list_add(struct hci_conn_params *param,
2254 struct list_head *list)
2255{
2256 list_add_rcu(¶m->action, list);
2257}
2258
2259/* This function requires the caller holds hdev->lock */
2260struct hci_conn_params *hci_conn_params_add(struct hci_dev *hdev,
2261 bdaddr_t *addr, u8 addr_type)
2262{
2263 struct hci_conn_params *params;
2264
2265 params = hci_conn_params_lookup(hdev, addr, addr_type);
2266 if (params)
2267 return params;
2268
2269 params = kzalloc(sizeof(*params), GFP_KERNEL);
2270 if (!params) {
2271 bt_dev_err(hdev, "out of memory");
2272 return NULL;
2273 }
2274
2275 bacpy(¶ms->addr, addr);
2276 params->addr_type = addr_type;
2277
2278 list_add(¶ms->list, &hdev->le_conn_params);
2279 INIT_LIST_HEAD(¶ms->action);
2280
2281 params->conn_min_interval = hdev->le_conn_min_interval;
2282 params->conn_max_interval = hdev->le_conn_max_interval;
2283 params->conn_latency = hdev->le_conn_latency;
2284 params->supervision_timeout = hdev->le_supv_timeout;
2285 params->auto_connect = HCI_AUTO_CONN_DISABLED;
2286
2287 BT_DBG("addr %pMR (type %u)", addr, addr_type);
2288
2289 return params;
2290}
2291
2292void hci_conn_params_free(struct hci_conn_params *params)
2293{
2294 hci_pend_le_list_del_init(params);
2295
2296 if (params->conn) {
2297 hci_conn_drop(params->conn);
2298 hci_conn_put(params->conn);
2299 }
2300
2301 list_del(¶ms->list);
2302 kfree(params);
2303}
2304
2305/* This function requires the caller holds hdev->lock */
2306void hci_conn_params_del(struct hci_dev *hdev, bdaddr_t *addr, u8 addr_type)
2307{
2308 struct hci_conn_params *params;
2309
2310 params = hci_conn_params_lookup(hdev, addr, addr_type);
2311 if (!params)
2312 return;
2313
2314 hci_conn_params_free(params);
2315
2316 hci_update_passive_scan(hdev);
2317
2318 BT_DBG("addr %pMR (type %u)", addr, addr_type);
2319}
2320
2321/* This function requires the caller holds hdev->lock */
2322void hci_conn_params_clear_disabled(struct hci_dev *hdev)
2323{
2324 struct hci_conn_params *params, *tmp;
2325
2326 list_for_each_entry_safe(params, tmp, &hdev->le_conn_params, list) {
2327 if (params->auto_connect != HCI_AUTO_CONN_DISABLED)
2328 continue;
2329
2330 /* If trying to establish one time connection to disabled
2331 * device, leave the params, but mark them as just once.
2332 */
2333 if (params->explicit_connect) {
2334 params->auto_connect = HCI_AUTO_CONN_EXPLICIT;
2335 continue;
2336 }
2337
2338 hci_conn_params_free(params);
2339 }
2340
2341 BT_DBG("All LE disabled connection parameters were removed");
2342}
2343
2344/* This function requires the caller holds hdev->lock */
2345static void hci_conn_params_clear_all(struct hci_dev *hdev)
2346{
2347 struct hci_conn_params *params, *tmp;
2348
2349 list_for_each_entry_safe(params, tmp, &hdev->le_conn_params, list)
2350 hci_conn_params_free(params);
2351
2352 BT_DBG("All LE connection parameters were removed");
2353}
2354
2355/* Copy the Identity Address of the controller.
2356 *
2357 * If the controller has a public BD_ADDR, then by default use that one.
2358 * If this is a LE only controller without a public address, default to
2359 * the static random address.
2360 *
2361 * For debugging purposes it is possible to force controllers with a
2362 * public address to use the static random address instead.
2363 *
2364 * In case BR/EDR has been disabled on a dual-mode controller and
2365 * userspace has configured a static address, then that address
2366 * becomes the identity address instead of the public BR/EDR address.
2367 */
2368void hci_copy_identity_address(struct hci_dev *hdev, bdaddr_t *bdaddr,
2369 u8 *bdaddr_type)
2370{
2371 if (hci_dev_test_flag(hdev, HCI_FORCE_STATIC_ADDR) ||
2372 !bacmp(&hdev->bdaddr, BDADDR_ANY) ||
2373 (!hci_dev_test_flag(hdev, HCI_BREDR_ENABLED) &&
2374 bacmp(&hdev->static_addr, BDADDR_ANY))) {
2375 bacpy(bdaddr, &hdev->static_addr);
2376 *bdaddr_type = ADDR_LE_DEV_RANDOM;
2377 } else {
2378 bacpy(bdaddr, &hdev->bdaddr);
2379 *bdaddr_type = ADDR_LE_DEV_PUBLIC;
2380 }
2381}
2382
2383static void hci_clear_wake_reason(struct hci_dev *hdev)
2384{
2385 hci_dev_lock(hdev);
2386
2387 hdev->wake_reason = 0;
2388 bacpy(&hdev->wake_addr, BDADDR_ANY);
2389 hdev->wake_addr_type = 0;
2390
2391 hci_dev_unlock(hdev);
2392}
2393
2394static int hci_suspend_notifier(struct notifier_block *nb, unsigned long action,
2395 void *data)
2396{
2397 struct hci_dev *hdev =
2398 container_of(nb, struct hci_dev, suspend_notifier);
2399 int ret = 0;
2400
2401 /* Userspace has full control of this device. Do nothing. */
2402 if (hci_dev_test_flag(hdev, HCI_USER_CHANNEL))
2403 return NOTIFY_DONE;
2404
2405 /* To avoid a potential race with hci_unregister_dev. */
2406 hci_dev_hold(hdev);
2407
2408 switch (action) {
2409 case PM_HIBERNATION_PREPARE:
2410 case PM_SUSPEND_PREPARE:
2411 ret = hci_suspend_dev(hdev);
2412 break;
2413 case PM_POST_HIBERNATION:
2414 case PM_POST_SUSPEND:
2415 ret = hci_resume_dev(hdev);
2416 break;
2417 }
2418
2419 if (ret)
2420 bt_dev_err(hdev, "Suspend notifier action (%lu) failed: %d",
2421 action, ret);
2422
2423 hci_dev_put(hdev);
2424 return NOTIFY_DONE;
2425}
2426
2427/* Alloc HCI device */
2428struct hci_dev *hci_alloc_dev_priv(int sizeof_priv)
2429{
2430 struct hci_dev *hdev;
2431 unsigned int alloc_size;
2432
2433 alloc_size = sizeof(*hdev);
2434 if (sizeof_priv) {
2435 /* Fixme: May need ALIGN-ment? */
2436 alloc_size += sizeof_priv;
2437 }
2438
2439 hdev = kzalloc(alloc_size, GFP_KERNEL);
2440 if (!hdev)
2441 return NULL;
2442
2443 hdev->pkt_type = (HCI_DM1 | HCI_DH1 | HCI_HV1);
2444 hdev->esco_type = (ESCO_HV1);
2445 hdev->link_mode = (HCI_LM_ACCEPT);
2446 hdev->num_iac = 0x01; /* One IAC support is mandatory */
2447 hdev->io_capability = 0x03; /* No Input No Output */
2448 hdev->manufacturer = 0xffff; /* Default to internal use */
2449 hdev->inq_tx_power = HCI_TX_POWER_INVALID;
2450 hdev->adv_tx_power = HCI_TX_POWER_INVALID;
2451 hdev->adv_instance_cnt = 0;
2452 hdev->cur_adv_instance = 0x00;
2453 hdev->adv_instance_timeout = 0;
2454
2455 hdev->advmon_allowlist_duration = 300;
2456 hdev->advmon_no_filter_duration = 500;
2457 hdev->enable_advmon_interleave_scan = 0x00; /* Default to disable */
2458
2459 hdev->sniff_max_interval = 800;
2460 hdev->sniff_min_interval = 80;
2461
2462 hdev->le_adv_channel_map = 0x07;
2463 hdev->le_adv_min_interval = 0x0800;
2464 hdev->le_adv_max_interval = 0x0800;
2465 hdev->le_scan_interval = DISCOV_LE_SCAN_INT_FAST;
2466 hdev->le_scan_window = DISCOV_LE_SCAN_WIN_FAST;
2467 hdev->le_scan_int_suspend = DISCOV_LE_SCAN_INT_SLOW1;
2468 hdev->le_scan_window_suspend = DISCOV_LE_SCAN_WIN_SLOW1;
2469 hdev->le_scan_int_discovery = DISCOV_LE_SCAN_INT;
2470 hdev->le_scan_window_discovery = DISCOV_LE_SCAN_WIN;
2471 hdev->le_scan_int_adv_monitor = DISCOV_LE_SCAN_INT_FAST;
2472 hdev->le_scan_window_adv_monitor = DISCOV_LE_SCAN_WIN_FAST;
2473 hdev->le_scan_int_connect = DISCOV_LE_SCAN_INT_CONN;
2474 hdev->le_scan_window_connect = DISCOV_LE_SCAN_WIN_CONN;
2475 hdev->le_conn_min_interval = 0x0018;
2476 hdev->le_conn_max_interval = 0x0028;
2477 hdev->le_conn_latency = 0x0000;
2478 hdev->le_supv_timeout = 0x002a;
2479 hdev->le_def_tx_len = 0x001b;
2480 hdev->le_def_tx_time = 0x0148;
2481 hdev->le_max_tx_len = 0x001b;
2482 hdev->le_max_tx_time = 0x0148;
2483 hdev->le_max_rx_len = 0x001b;
2484 hdev->le_max_rx_time = 0x0148;
2485 hdev->le_max_key_size = SMP_MAX_ENC_KEY_SIZE;
2486 hdev->le_min_key_size = SMP_MIN_ENC_KEY_SIZE;
2487 hdev->le_tx_def_phys = HCI_LE_SET_PHY_1M;
2488 hdev->le_rx_def_phys = HCI_LE_SET_PHY_1M;
2489 hdev->le_num_of_adv_sets = HCI_MAX_ADV_INSTANCES;
2490 hdev->def_multi_adv_rotation_duration = HCI_DEFAULT_ADV_DURATION;
2491 hdev->def_le_autoconnect_timeout = HCI_LE_CONN_TIMEOUT;
2492 hdev->min_le_tx_power = HCI_TX_POWER_INVALID;
2493 hdev->max_le_tx_power = HCI_TX_POWER_INVALID;
2494
2495 hdev->rpa_timeout = HCI_DEFAULT_RPA_TIMEOUT;
2496 hdev->discov_interleaved_timeout = DISCOV_INTERLEAVED_TIMEOUT;
2497 hdev->conn_info_min_age = DEFAULT_CONN_INFO_MIN_AGE;
2498 hdev->conn_info_max_age = DEFAULT_CONN_INFO_MAX_AGE;
2499 hdev->auth_payload_timeout = DEFAULT_AUTH_PAYLOAD_TIMEOUT;
2500 hdev->min_enc_key_size = HCI_MIN_ENC_KEY_SIZE;
2501
2502 /* default 1.28 sec page scan */
2503 hdev->def_page_scan_type = PAGE_SCAN_TYPE_STANDARD;
2504 hdev->def_page_scan_int = 0x0800;
2505 hdev->def_page_scan_window = 0x0012;
2506
2507 mutex_init(&hdev->lock);
2508 mutex_init(&hdev->req_lock);
2509
2510 ida_init(&hdev->unset_handle_ida);
2511
2512 INIT_LIST_HEAD(&hdev->mesh_pending);
2513 INIT_LIST_HEAD(&hdev->mgmt_pending);
2514 INIT_LIST_HEAD(&hdev->reject_list);
2515 INIT_LIST_HEAD(&hdev->accept_list);
2516 INIT_LIST_HEAD(&hdev->uuids);
2517 INIT_LIST_HEAD(&hdev->link_keys);
2518 INIT_LIST_HEAD(&hdev->long_term_keys);
2519 INIT_LIST_HEAD(&hdev->identity_resolving_keys);
2520 INIT_LIST_HEAD(&hdev->remote_oob_data);
2521 INIT_LIST_HEAD(&hdev->le_accept_list);
2522 INIT_LIST_HEAD(&hdev->le_resolv_list);
2523 INIT_LIST_HEAD(&hdev->le_conn_params);
2524 INIT_LIST_HEAD(&hdev->pend_le_conns);
2525 INIT_LIST_HEAD(&hdev->pend_le_reports);
2526 INIT_LIST_HEAD(&hdev->conn_hash.list);
2527 INIT_LIST_HEAD(&hdev->adv_instances);
2528 INIT_LIST_HEAD(&hdev->blocked_keys);
2529 INIT_LIST_HEAD(&hdev->monitored_devices);
2530
2531 INIT_LIST_HEAD(&hdev->local_codecs);
2532 INIT_WORK(&hdev->rx_work, hci_rx_work);
2533 INIT_WORK(&hdev->cmd_work, hci_cmd_work);
2534 INIT_WORK(&hdev->tx_work, hci_tx_work);
2535 INIT_WORK(&hdev->power_on, hci_power_on);
2536 INIT_WORK(&hdev->error_reset, hci_error_reset);
2537
2538 hci_cmd_sync_init(hdev);
2539
2540 INIT_DELAYED_WORK(&hdev->power_off, hci_power_off);
2541
2542 skb_queue_head_init(&hdev->rx_q);
2543 skb_queue_head_init(&hdev->cmd_q);
2544 skb_queue_head_init(&hdev->raw_q);
2545
2546 init_waitqueue_head(&hdev->req_wait_q);
2547
2548 INIT_DELAYED_WORK(&hdev->cmd_timer, hci_cmd_timeout);
2549 INIT_DELAYED_WORK(&hdev->ncmd_timer, hci_ncmd_timeout);
2550
2551 hci_devcd_setup(hdev);
2552
2553 hci_init_sysfs(hdev);
2554 discovery_init(hdev);
2555
2556 return hdev;
2557}
2558EXPORT_SYMBOL(hci_alloc_dev_priv);
2559
2560/* Free HCI device */
2561void hci_free_dev(struct hci_dev *hdev)
2562{
2563 /* will free via device release */
2564 put_device(&hdev->dev);
2565}
2566EXPORT_SYMBOL(hci_free_dev);
2567
2568/* Register HCI device */
2569int hci_register_dev(struct hci_dev *hdev)
2570{
2571 int id, error;
2572
2573 if (!hdev->open || !hdev->close || !hdev->send)
2574 return -EINVAL;
2575
2576 id = ida_alloc_max(&hci_index_ida, HCI_MAX_ID - 1, GFP_KERNEL);
2577 if (id < 0)
2578 return id;
2579
2580 error = dev_set_name(&hdev->dev, "hci%u", id);
2581 if (error)
2582 return error;
2583
2584 hdev->name = dev_name(&hdev->dev);
2585 hdev->id = id;
2586
2587 BT_DBG("%p name %s bus %d", hdev, hdev->name, hdev->bus);
2588
2589 hdev->workqueue = alloc_ordered_workqueue("%s", WQ_HIGHPRI, hdev->name);
2590 if (!hdev->workqueue) {
2591 error = -ENOMEM;
2592 goto err;
2593 }
2594
2595 hdev->req_workqueue = alloc_ordered_workqueue("%s", WQ_HIGHPRI,
2596 hdev->name);
2597 if (!hdev->req_workqueue) {
2598 destroy_workqueue(hdev->workqueue);
2599 error = -ENOMEM;
2600 goto err;
2601 }
2602
2603 if (!IS_ERR_OR_NULL(bt_debugfs))
2604 hdev->debugfs = debugfs_create_dir(hdev->name, bt_debugfs);
2605
2606 error = device_add(&hdev->dev);
2607 if (error < 0)
2608 goto err_wqueue;
2609
2610 hci_leds_init(hdev);
2611
2612 hdev->rfkill = rfkill_alloc(hdev->name, &hdev->dev,
2613 RFKILL_TYPE_BLUETOOTH, &hci_rfkill_ops,
2614 hdev);
2615 if (hdev->rfkill) {
2616 if (rfkill_register(hdev->rfkill) < 0) {
2617 rfkill_destroy(hdev->rfkill);
2618 hdev->rfkill = NULL;
2619 }
2620 }
2621
2622 if (hdev->rfkill && rfkill_blocked(hdev->rfkill))
2623 hci_dev_set_flag(hdev, HCI_RFKILLED);
2624
2625 hci_dev_set_flag(hdev, HCI_SETUP);
2626 hci_dev_set_flag(hdev, HCI_AUTO_OFF);
2627
2628 /* Assume BR/EDR support until proven otherwise (such as
2629 * through reading supported features during init.
2630 */
2631 hci_dev_set_flag(hdev, HCI_BREDR_ENABLED);
2632
2633 write_lock(&hci_dev_list_lock);
2634 list_add(&hdev->list, &hci_dev_list);
2635 write_unlock(&hci_dev_list_lock);
2636
2637 /* Devices that are marked for raw-only usage are unconfigured
2638 * and should not be included in normal operation.
2639 */
2640 if (test_bit(HCI_QUIRK_RAW_DEVICE, &hdev->quirks))
2641 hci_dev_set_flag(hdev, HCI_UNCONFIGURED);
2642
2643 /* Mark Remote Wakeup connection flag as supported if driver has wakeup
2644 * callback.
2645 */
2646 if (hdev->wakeup)
2647 hdev->conn_flags |= HCI_CONN_FLAG_REMOTE_WAKEUP;
2648
2649 hci_sock_dev_event(hdev, HCI_DEV_REG);
2650 hci_dev_hold(hdev);
2651
2652 error = hci_register_suspend_notifier(hdev);
2653 if (error)
2654 BT_WARN("register suspend notifier failed error:%d\n", error);
2655
2656 queue_work(hdev->req_workqueue, &hdev->power_on);
2657
2658 idr_init(&hdev->adv_monitors_idr);
2659 msft_register(hdev);
2660
2661 return id;
2662
2663err_wqueue:
2664 debugfs_remove_recursive(hdev->debugfs);
2665 destroy_workqueue(hdev->workqueue);
2666 destroy_workqueue(hdev->req_workqueue);
2667err:
2668 ida_free(&hci_index_ida, hdev->id);
2669
2670 return error;
2671}
2672EXPORT_SYMBOL(hci_register_dev);
2673
2674/* Unregister HCI device */
2675void hci_unregister_dev(struct hci_dev *hdev)
2676{
2677 BT_DBG("%p name %s bus %d", hdev, hdev->name, hdev->bus);
2678
2679 mutex_lock(&hdev->unregister_lock);
2680 hci_dev_set_flag(hdev, HCI_UNREGISTER);
2681 mutex_unlock(&hdev->unregister_lock);
2682
2683 write_lock(&hci_dev_list_lock);
2684 list_del(&hdev->list);
2685 write_unlock(&hci_dev_list_lock);
2686
2687 disable_work_sync(&hdev->rx_work);
2688 disable_work_sync(&hdev->cmd_work);
2689 disable_work_sync(&hdev->tx_work);
2690 disable_work_sync(&hdev->power_on);
2691 disable_work_sync(&hdev->error_reset);
2692
2693 hci_cmd_sync_clear(hdev);
2694
2695 hci_unregister_suspend_notifier(hdev);
2696
2697 hci_dev_do_close(hdev);
2698
2699 if (!test_bit(HCI_INIT, &hdev->flags) &&
2700 !hci_dev_test_flag(hdev, HCI_SETUP) &&
2701 !hci_dev_test_flag(hdev, HCI_CONFIG)) {
2702 hci_dev_lock(hdev);
2703 mgmt_index_removed(hdev);
2704 hci_dev_unlock(hdev);
2705 }
2706
2707 /* mgmt_index_removed should take care of emptying the
2708 * pending list */
2709 BUG_ON(!list_empty(&hdev->mgmt_pending));
2710
2711 hci_sock_dev_event(hdev, HCI_DEV_UNREG);
2712
2713 if (hdev->rfkill) {
2714 rfkill_unregister(hdev->rfkill);
2715 rfkill_destroy(hdev->rfkill);
2716 }
2717
2718 device_del(&hdev->dev);
2719 /* Actual cleanup is deferred until hci_release_dev(). */
2720 hci_dev_put(hdev);
2721}
2722EXPORT_SYMBOL(hci_unregister_dev);
2723
2724/* Release HCI device */
2725void hci_release_dev(struct hci_dev *hdev)
2726{
2727 debugfs_remove_recursive(hdev->debugfs);
2728 kfree_const(hdev->hw_info);
2729 kfree_const(hdev->fw_info);
2730
2731 destroy_workqueue(hdev->workqueue);
2732 destroy_workqueue(hdev->req_workqueue);
2733
2734 hci_dev_lock(hdev);
2735 hci_bdaddr_list_clear(&hdev->reject_list);
2736 hci_bdaddr_list_clear(&hdev->accept_list);
2737 hci_uuids_clear(hdev);
2738 hci_link_keys_clear(hdev);
2739 hci_smp_ltks_clear(hdev);
2740 hci_smp_irks_clear(hdev);
2741 hci_remote_oob_data_clear(hdev);
2742 hci_adv_instances_clear(hdev);
2743 hci_adv_monitors_clear(hdev);
2744 hci_bdaddr_list_clear(&hdev->le_accept_list);
2745 hci_bdaddr_list_clear(&hdev->le_resolv_list);
2746 hci_conn_params_clear_all(hdev);
2747 hci_discovery_filter_clear(hdev);
2748 hci_blocked_keys_clear(hdev);
2749 hci_codec_list_clear(&hdev->local_codecs);
2750 msft_release(hdev);
2751 hci_dev_unlock(hdev);
2752
2753 ida_destroy(&hdev->unset_handle_ida);
2754 ida_free(&hci_index_ida, hdev->id);
2755 kfree_skb(hdev->sent_cmd);
2756 kfree_skb(hdev->req_skb);
2757 kfree_skb(hdev->recv_event);
2758 kfree(hdev);
2759}
2760EXPORT_SYMBOL(hci_release_dev);
2761
2762int hci_register_suspend_notifier(struct hci_dev *hdev)
2763{
2764 int ret = 0;
2765
2766 if (!hdev->suspend_notifier.notifier_call &&
2767 !test_bit(HCI_QUIRK_NO_SUSPEND_NOTIFIER, &hdev->quirks)) {
2768 hdev->suspend_notifier.notifier_call = hci_suspend_notifier;
2769 ret = register_pm_notifier(&hdev->suspend_notifier);
2770 }
2771
2772 return ret;
2773}
2774
2775int hci_unregister_suspend_notifier(struct hci_dev *hdev)
2776{
2777 int ret = 0;
2778
2779 if (hdev->suspend_notifier.notifier_call) {
2780 ret = unregister_pm_notifier(&hdev->suspend_notifier);
2781 if (!ret)
2782 hdev->suspend_notifier.notifier_call = NULL;
2783 }
2784
2785 return ret;
2786}
2787
2788/* Cancel ongoing command synchronously:
2789 *
2790 * - Cancel command timer
2791 * - Reset command counter
2792 * - Cancel command request
2793 */
2794static void hci_cancel_cmd_sync(struct hci_dev *hdev, int err)
2795{
2796 bt_dev_dbg(hdev, "err 0x%2.2x", err);
2797
2798 if (hci_dev_test_flag(hdev, HCI_UNREGISTER)) {
2799 disable_delayed_work_sync(&hdev->cmd_timer);
2800 disable_delayed_work_sync(&hdev->ncmd_timer);
2801 } else {
2802 cancel_delayed_work_sync(&hdev->cmd_timer);
2803 cancel_delayed_work_sync(&hdev->ncmd_timer);
2804 }
2805
2806 atomic_set(&hdev->cmd_cnt, 1);
2807
2808 hci_cmd_sync_cancel_sync(hdev, err);
2809}
2810
2811/* Suspend HCI device */
2812int hci_suspend_dev(struct hci_dev *hdev)
2813{
2814 int ret;
2815
2816 bt_dev_dbg(hdev, "");
2817
2818 /* Suspend should only act on when powered. */
2819 if (!hdev_is_powered(hdev) ||
2820 hci_dev_test_flag(hdev, HCI_UNREGISTER))
2821 return 0;
2822
2823 /* If powering down don't attempt to suspend */
2824 if (mgmt_powering_down(hdev))
2825 return 0;
2826
2827 /* Cancel potentially blocking sync operation before suspend */
2828 hci_cancel_cmd_sync(hdev, EHOSTDOWN);
2829
2830 hci_req_sync_lock(hdev);
2831 ret = hci_suspend_sync(hdev);
2832 hci_req_sync_unlock(hdev);
2833
2834 hci_clear_wake_reason(hdev);
2835 mgmt_suspending(hdev, hdev->suspend_state);
2836
2837 hci_sock_dev_event(hdev, HCI_DEV_SUSPEND);
2838 return ret;
2839}
2840EXPORT_SYMBOL(hci_suspend_dev);
2841
2842/* Resume HCI device */
2843int hci_resume_dev(struct hci_dev *hdev)
2844{
2845 int ret;
2846
2847 bt_dev_dbg(hdev, "");
2848
2849 /* Resume should only act on when powered. */
2850 if (!hdev_is_powered(hdev) ||
2851 hci_dev_test_flag(hdev, HCI_UNREGISTER))
2852 return 0;
2853
2854 /* If powering down don't attempt to resume */
2855 if (mgmt_powering_down(hdev))
2856 return 0;
2857
2858 hci_req_sync_lock(hdev);
2859 ret = hci_resume_sync(hdev);
2860 hci_req_sync_unlock(hdev);
2861
2862 mgmt_resuming(hdev, hdev->wake_reason, &hdev->wake_addr,
2863 hdev->wake_addr_type);
2864
2865 hci_sock_dev_event(hdev, HCI_DEV_RESUME);
2866 return ret;
2867}
2868EXPORT_SYMBOL(hci_resume_dev);
2869
2870/* Reset HCI device */
2871int hci_reset_dev(struct hci_dev *hdev)
2872{
2873 static const u8 hw_err[] = { HCI_EV_HARDWARE_ERROR, 0x01, 0x00 };
2874 struct sk_buff *skb;
2875
2876 skb = bt_skb_alloc(3, GFP_ATOMIC);
2877 if (!skb)
2878 return -ENOMEM;
2879
2880 hci_skb_pkt_type(skb) = HCI_EVENT_PKT;
2881 skb_put_data(skb, hw_err, 3);
2882
2883 bt_dev_err(hdev, "Injecting HCI hardware error event");
2884
2885 /* Send Hardware Error to upper stack */
2886 return hci_recv_frame(hdev, skb);
2887}
2888EXPORT_SYMBOL(hci_reset_dev);
2889
2890static u8 hci_dev_classify_pkt_type(struct hci_dev *hdev, struct sk_buff *skb)
2891{
2892 if (hdev->classify_pkt_type)
2893 return hdev->classify_pkt_type(hdev, skb);
2894
2895 return hci_skb_pkt_type(skb);
2896}
2897
2898/* Receive frame from HCI drivers */
2899int hci_recv_frame(struct hci_dev *hdev, struct sk_buff *skb)
2900{
2901 u8 dev_pkt_type;
2902
2903 if (!hdev || (!test_bit(HCI_UP, &hdev->flags)
2904 && !test_bit(HCI_INIT, &hdev->flags))) {
2905 kfree_skb(skb);
2906 return -ENXIO;
2907 }
2908
2909 /* Check if the driver agree with packet type classification */
2910 dev_pkt_type = hci_dev_classify_pkt_type(hdev, skb);
2911 if (hci_skb_pkt_type(skb) != dev_pkt_type) {
2912 hci_skb_pkt_type(skb) = dev_pkt_type;
2913 }
2914
2915 switch (hci_skb_pkt_type(skb)) {
2916 case HCI_EVENT_PKT:
2917 break;
2918 case HCI_ACLDATA_PKT:
2919 /* Detect if ISO packet has been sent as ACL */
2920 if (hci_conn_num(hdev, ISO_LINK)) {
2921 __u16 handle = __le16_to_cpu(hci_acl_hdr(skb)->handle);
2922 __u8 type;
2923
2924 type = hci_conn_lookup_type(hdev, hci_handle(handle));
2925 if (type == ISO_LINK)
2926 hci_skb_pkt_type(skb) = HCI_ISODATA_PKT;
2927 }
2928 break;
2929 case HCI_SCODATA_PKT:
2930 break;
2931 case HCI_ISODATA_PKT:
2932 break;
2933 default:
2934 kfree_skb(skb);
2935 return -EINVAL;
2936 }
2937
2938 /* Incoming skb */
2939 bt_cb(skb)->incoming = 1;
2940
2941 /* Time stamp */
2942 __net_timestamp(skb);
2943
2944 skb_queue_tail(&hdev->rx_q, skb);
2945 queue_work(hdev->workqueue, &hdev->rx_work);
2946
2947 return 0;
2948}
2949EXPORT_SYMBOL(hci_recv_frame);
2950
2951/* Receive diagnostic message from HCI drivers */
2952int hci_recv_diag(struct hci_dev *hdev, struct sk_buff *skb)
2953{
2954 /* Mark as diagnostic packet */
2955 hci_skb_pkt_type(skb) = HCI_DIAG_PKT;
2956
2957 /* Time stamp */
2958 __net_timestamp(skb);
2959
2960 skb_queue_tail(&hdev->rx_q, skb);
2961 queue_work(hdev->workqueue, &hdev->rx_work);
2962
2963 return 0;
2964}
2965EXPORT_SYMBOL(hci_recv_diag);
2966
2967void hci_set_hw_info(struct hci_dev *hdev, const char *fmt, ...)
2968{
2969 va_list vargs;
2970
2971 va_start(vargs, fmt);
2972 kfree_const(hdev->hw_info);
2973 hdev->hw_info = kvasprintf_const(GFP_KERNEL, fmt, vargs);
2974 va_end(vargs);
2975}
2976EXPORT_SYMBOL(hci_set_hw_info);
2977
2978void hci_set_fw_info(struct hci_dev *hdev, const char *fmt, ...)
2979{
2980 va_list vargs;
2981
2982 va_start(vargs, fmt);
2983 kfree_const(hdev->fw_info);
2984 hdev->fw_info = kvasprintf_const(GFP_KERNEL, fmt, vargs);
2985 va_end(vargs);
2986}
2987EXPORT_SYMBOL(hci_set_fw_info);
2988
2989/* ---- Interface to upper protocols ---- */
2990
2991int hci_register_cb(struct hci_cb *cb)
2992{
2993 BT_DBG("%p name %s", cb, cb->name);
2994
2995 list_add_tail_rcu(&cb->list, &hci_cb_list);
2996
2997 return 0;
2998}
2999EXPORT_SYMBOL(hci_register_cb);
3000
3001int hci_unregister_cb(struct hci_cb *cb)
3002{
3003 BT_DBG("%p name %s", cb, cb->name);
3004
3005 list_del_rcu(&cb->list);
3006 synchronize_rcu();
3007
3008 return 0;
3009}
3010EXPORT_SYMBOL(hci_unregister_cb);
3011
3012static int hci_send_frame(struct hci_dev *hdev, struct sk_buff *skb)
3013{
3014 int err;
3015
3016 BT_DBG("%s type %d len %d", hdev->name, hci_skb_pkt_type(skb),
3017 skb->len);
3018
3019 /* Time stamp */
3020 __net_timestamp(skb);
3021
3022 /* Send copy to monitor */
3023 hci_send_to_monitor(hdev, skb);
3024
3025 if (atomic_read(&hdev->promisc)) {
3026 /* Send copy to the sockets */
3027 hci_send_to_sock(hdev, skb);
3028 }
3029
3030 /* Get rid of skb owner, prior to sending to the driver. */
3031 skb_orphan(skb);
3032
3033 if (!test_bit(HCI_RUNNING, &hdev->flags)) {
3034 kfree_skb(skb);
3035 return -EINVAL;
3036 }
3037
3038 err = hdev->send(hdev, skb);
3039 if (err < 0) {
3040 bt_dev_err(hdev, "sending frame failed (%d)", err);
3041 kfree_skb(skb);
3042 return err;
3043 }
3044
3045 return 0;
3046}
3047
3048/* Send HCI command */
3049int hci_send_cmd(struct hci_dev *hdev, __u16 opcode, __u32 plen,
3050 const void *param)
3051{
3052 struct sk_buff *skb;
3053
3054 BT_DBG("%s opcode 0x%4.4x plen %d", hdev->name, opcode, plen);
3055
3056 skb = hci_cmd_sync_alloc(hdev, opcode, plen, param, NULL);
3057 if (!skb) {
3058 bt_dev_err(hdev, "no memory for command");
3059 return -ENOMEM;
3060 }
3061
3062 /* Stand-alone HCI commands must be flagged as
3063 * single-command requests.
3064 */
3065 bt_cb(skb)->hci.req_flags |= HCI_REQ_START;
3066
3067 skb_queue_tail(&hdev->cmd_q, skb);
3068 queue_work(hdev->workqueue, &hdev->cmd_work);
3069
3070 return 0;
3071}
3072
3073int __hci_cmd_send(struct hci_dev *hdev, u16 opcode, u32 plen,
3074 const void *param)
3075{
3076 struct sk_buff *skb;
3077
3078 if (hci_opcode_ogf(opcode) != 0x3f) {
3079 /* A controller receiving a command shall respond with either
3080 * a Command Status Event or a Command Complete Event.
3081 * Therefore, all standard HCI commands must be sent via the
3082 * standard API, using hci_send_cmd or hci_cmd_sync helpers.
3083 * Some vendors do not comply with this rule for vendor-specific
3084 * commands and do not return any event. We want to support
3085 * unresponded commands for such cases only.
3086 */
3087 bt_dev_err(hdev, "unresponded command not supported");
3088 return -EINVAL;
3089 }
3090
3091 skb = hci_cmd_sync_alloc(hdev, opcode, plen, param, NULL);
3092 if (!skb) {
3093 bt_dev_err(hdev, "no memory for command (opcode 0x%4.4x)",
3094 opcode);
3095 return -ENOMEM;
3096 }
3097
3098 hci_send_frame(hdev, skb);
3099
3100 return 0;
3101}
3102EXPORT_SYMBOL(__hci_cmd_send);
3103
3104/* Get data from the previously sent command */
3105static void *hci_cmd_data(struct sk_buff *skb, __u16 opcode)
3106{
3107 struct hci_command_hdr *hdr;
3108
3109 if (!skb || skb->len < HCI_COMMAND_HDR_SIZE)
3110 return NULL;
3111
3112 hdr = (void *)skb->data;
3113
3114 if (hdr->opcode != cpu_to_le16(opcode))
3115 return NULL;
3116
3117 return skb->data + HCI_COMMAND_HDR_SIZE;
3118}
3119
3120/* Get data from the previously sent command */
3121void *hci_sent_cmd_data(struct hci_dev *hdev, __u16 opcode)
3122{
3123 void *data;
3124
3125 /* Check if opcode matches last sent command */
3126 data = hci_cmd_data(hdev->sent_cmd, opcode);
3127 if (!data)
3128 /* Check if opcode matches last request */
3129 data = hci_cmd_data(hdev->req_skb, opcode);
3130
3131 return data;
3132}
3133
3134/* Get data from last received event */
3135void *hci_recv_event_data(struct hci_dev *hdev, __u8 event)
3136{
3137 struct hci_event_hdr *hdr;
3138 int offset;
3139
3140 if (!hdev->recv_event)
3141 return NULL;
3142
3143 hdr = (void *)hdev->recv_event->data;
3144 offset = sizeof(*hdr);
3145
3146 if (hdr->evt != event) {
3147 /* In case of LE metaevent check the subevent match */
3148 if (hdr->evt == HCI_EV_LE_META) {
3149 struct hci_ev_le_meta *ev;
3150
3151 ev = (void *)hdev->recv_event->data + offset;
3152 offset += sizeof(*ev);
3153 if (ev->subevent == event)
3154 goto found;
3155 }
3156 return NULL;
3157 }
3158
3159found:
3160 bt_dev_dbg(hdev, "event 0x%2.2x", event);
3161
3162 return hdev->recv_event->data + offset;
3163}
3164
3165/* Send ACL data */
3166static void hci_add_acl_hdr(struct sk_buff *skb, __u16 handle, __u16 flags)
3167{
3168 struct hci_acl_hdr *hdr;
3169 int len = skb->len;
3170
3171 skb_push(skb, HCI_ACL_HDR_SIZE);
3172 skb_reset_transport_header(skb);
3173 hdr = (struct hci_acl_hdr *)skb_transport_header(skb);
3174 hdr->handle = cpu_to_le16(hci_handle_pack(handle, flags));
3175 hdr->dlen = cpu_to_le16(len);
3176}
3177
3178static void hci_queue_acl(struct hci_chan *chan, struct sk_buff_head *queue,
3179 struct sk_buff *skb, __u16 flags)
3180{
3181 struct hci_conn *conn = chan->conn;
3182 struct hci_dev *hdev = conn->hdev;
3183 struct sk_buff *list;
3184
3185 skb->len = skb_headlen(skb);
3186 skb->data_len = 0;
3187
3188 hci_skb_pkt_type(skb) = HCI_ACLDATA_PKT;
3189
3190 hci_add_acl_hdr(skb, conn->handle, flags);
3191
3192 list = skb_shinfo(skb)->frag_list;
3193 if (!list) {
3194 /* Non fragmented */
3195 BT_DBG("%s nonfrag skb %p len %d", hdev->name, skb, skb->len);
3196
3197 skb_queue_tail(queue, skb);
3198 } else {
3199 /* Fragmented */
3200 BT_DBG("%s frag %p len %d", hdev->name, skb, skb->len);
3201
3202 skb_shinfo(skb)->frag_list = NULL;
3203
3204 /* Queue all fragments atomically. We need to use spin_lock_bh
3205 * here because of 6LoWPAN links, as there this function is
3206 * called from softirq and using normal spin lock could cause
3207 * deadlocks.
3208 */
3209 spin_lock_bh(&queue->lock);
3210
3211 __skb_queue_tail(queue, skb);
3212
3213 flags &= ~ACL_START;
3214 flags |= ACL_CONT;
3215 do {
3216 skb = list; list = list->next;
3217
3218 hci_skb_pkt_type(skb) = HCI_ACLDATA_PKT;
3219 hci_add_acl_hdr(skb, conn->handle, flags);
3220
3221 BT_DBG("%s frag %p len %d", hdev->name, skb, skb->len);
3222
3223 __skb_queue_tail(queue, skb);
3224 } while (list);
3225
3226 spin_unlock_bh(&queue->lock);
3227 }
3228}
3229
3230void hci_send_acl(struct hci_chan *chan, struct sk_buff *skb, __u16 flags)
3231{
3232 struct hci_dev *hdev = chan->conn->hdev;
3233
3234 BT_DBG("%s chan %p flags 0x%4.4x", hdev->name, chan, flags);
3235
3236 hci_queue_acl(chan, &chan->data_q, skb, flags);
3237
3238 queue_work(hdev->workqueue, &hdev->tx_work);
3239}
3240
3241/* Send SCO data */
3242void hci_send_sco(struct hci_conn *conn, struct sk_buff *skb)
3243{
3244 struct hci_dev *hdev = conn->hdev;
3245 struct hci_sco_hdr hdr;
3246
3247 BT_DBG("%s len %d", hdev->name, skb->len);
3248
3249 hdr.handle = cpu_to_le16(conn->handle);
3250 hdr.dlen = skb->len;
3251
3252 skb_push(skb, HCI_SCO_HDR_SIZE);
3253 skb_reset_transport_header(skb);
3254 memcpy(skb_transport_header(skb), &hdr, HCI_SCO_HDR_SIZE);
3255
3256 hci_skb_pkt_type(skb) = HCI_SCODATA_PKT;
3257
3258 skb_queue_tail(&conn->data_q, skb);
3259 queue_work(hdev->workqueue, &hdev->tx_work);
3260}
3261
3262/* Send ISO data */
3263static void hci_add_iso_hdr(struct sk_buff *skb, __u16 handle, __u8 flags)
3264{
3265 struct hci_iso_hdr *hdr;
3266 int len = skb->len;
3267
3268 skb_push(skb, HCI_ISO_HDR_SIZE);
3269 skb_reset_transport_header(skb);
3270 hdr = (struct hci_iso_hdr *)skb_transport_header(skb);
3271 hdr->handle = cpu_to_le16(hci_handle_pack(handle, flags));
3272 hdr->dlen = cpu_to_le16(len);
3273}
3274
3275static void hci_queue_iso(struct hci_conn *conn, struct sk_buff_head *queue,
3276 struct sk_buff *skb)
3277{
3278 struct hci_dev *hdev = conn->hdev;
3279 struct sk_buff *list;
3280 __u16 flags;
3281
3282 skb->len = skb_headlen(skb);
3283 skb->data_len = 0;
3284
3285 hci_skb_pkt_type(skb) = HCI_ISODATA_PKT;
3286
3287 list = skb_shinfo(skb)->frag_list;
3288
3289 flags = hci_iso_flags_pack(list ? ISO_START : ISO_SINGLE, 0x00);
3290 hci_add_iso_hdr(skb, conn->handle, flags);
3291
3292 if (!list) {
3293 /* Non fragmented */
3294 BT_DBG("%s nonfrag skb %p len %d", hdev->name, skb, skb->len);
3295
3296 skb_queue_tail(queue, skb);
3297 } else {
3298 /* Fragmented */
3299 BT_DBG("%s frag %p len %d", hdev->name, skb, skb->len);
3300
3301 skb_shinfo(skb)->frag_list = NULL;
3302
3303 __skb_queue_tail(queue, skb);
3304
3305 do {
3306 skb = list; list = list->next;
3307
3308 hci_skb_pkt_type(skb) = HCI_ISODATA_PKT;
3309 flags = hci_iso_flags_pack(list ? ISO_CONT : ISO_END,
3310 0x00);
3311 hci_add_iso_hdr(skb, conn->handle, flags);
3312
3313 BT_DBG("%s frag %p len %d", hdev->name, skb, skb->len);
3314
3315 __skb_queue_tail(queue, skb);
3316 } while (list);
3317 }
3318}
3319
3320void hci_send_iso(struct hci_conn *conn, struct sk_buff *skb)
3321{
3322 struct hci_dev *hdev = conn->hdev;
3323
3324 BT_DBG("%s len %d", hdev->name, skb->len);
3325
3326 hci_queue_iso(conn, &conn->data_q, skb);
3327
3328 queue_work(hdev->workqueue, &hdev->tx_work);
3329}
3330
3331/* ---- HCI TX task (outgoing data) ---- */
3332
3333/* HCI Connection scheduler */
3334static inline void hci_quote_sent(struct hci_conn *conn, int num, int *quote)
3335{
3336 struct hci_dev *hdev;
3337 int cnt, q;
3338
3339 if (!conn) {
3340 *quote = 0;
3341 return;
3342 }
3343
3344 hdev = conn->hdev;
3345
3346 switch (conn->type) {
3347 case ACL_LINK:
3348 cnt = hdev->acl_cnt;
3349 break;
3350 case SCO_LINK:
3351 case ESCO_LINK:
3352 cnt = hdev->sco_cnt;
3353 break;
3354 case LE_LINK:
3355 cnt = hdev->le_mtu ? hdev->le_cnt : hdev->acl_cnt;
3356 break;
3357 case ISO_LINK:
3358 cnt = hdev->iso_mtu ? hdev->iso_cnt :
3359 hdev->le_mtu ? hdev->le_cnt : hdev->acl_cnt;
3360 break;
3361 default:
3362 cnt = 0;
3363 bt_dev_err(hdev, "unknown link type %d", conn->type);
3364 }
3365
3366 q = cnt / num;
3367 *quote = q ? q : 1;
3368}
3369
3370static struct hci_conn *hci_low_sent(struct hci_dev *hdev, __u8 type,
3371 int *quote)
3372{
3373 struct hci_conn_hash *h = &hdev->conn_hash;
3374 struct hci_conn *conn = NULL, *c;
3375 unsigned int num = 0, min = ~0;
3376
3377 /* We don't have to lock device here. Connections are always
3378 * added and removed with TX task disabled. */
3379
3380 rcu_read_lock();
3381
3382 list_for_each_entry_rcu(c, &h->list, list) {
3383 if (c->type != type || skb_queue_empty(&c->data_q))
3384 continue;
3385
3386 if (c->state != BT_CONNECTED && c->state != BT_CONFIG)
3387 continue;
3388
3389 num++;
3390
3391 if (c->sent < min) {
3392 min = c->sent;
3393 conn = c;
3394 }
3395
3396 if (hci_conn_num(hdev, type) == num)
3397 break;
3398 }
3399
3400 rcu_read_unlock();
3401
3402 hci_quote_sent(conn, num, quote);
3403
3404 BT_DBG("conn %p quote %d", conn, *quote);
3405 return conn;
3406}
3407
3408static void hci_link_tx_to(struct hci_dev *hdev, __u8 type)
3409{
3410 struct hci_conn_hash *h = &hdev->conn_hash;
3411 struct hci_conn *c;
3412
3413 bt_dev_err(hdev, "link tx timeout");
3414
3415 rcu_read_lock();
3416
3417 /* Kill stalled connections */
3418 list_for_each_entry_rcu(c, &h->list, list) {
3419 if (c->type == type && c->sent) {
3420 bt_dev_err(hdev, "killing stalled connection %pMR",
3421 &c->dst);
3422 /* hci_disconnect might sleep, so, we have to release
3423 * the RCU read lock before calling it.
3424 */
3425 rcu_read_unlock();
3426 hci_disconnect(c, HCI_ERROR_REMOTE_USER_TERM);
3427 rcu_read_lock();
3428 }
3429 }
3430
3431 rcu_read_unlock();
3432}
3433
3434static struct hci_chan *hci_chan_sent(struct hci_dev *hdev, __u8 type,
3435 int *quote)
3436{
3437 struct hci_conn_hash *h = &hdev->conn_hash;
3438 struct hci_chan *chan = NULL;
3439 unsigned int num = 0, min = ~0, cur_prio = 0;
3440 struct hci_conn *conn;
3441 int conn_num = 0;
3442
3443 BT_DBG("%s", hdev->name);
3444
3445 rcu_read_lock();
3446
3447 list_for_each_entry_rcu(conn, &h->list, list) {
3448 struct hci_chan *tmp;
3449
3450 if (conn->type != type)
3451 continue;
3452
3453 if (conn->state != BT_CONNECTED && conn->state != BT_CONFIG)
3454 continue;
3455
3456 conn_num++;
3457
3458 list_for_each_entry_rcu(tmp, &conn->chan_list, list) {
3459 struct sk_buff *skb;
3460
3461 if (skb_queue_empty(&tmp->data_q))
3462 continue;
3463
3464 skb = skb_peek(&tmp->data_q);
3465 if (skb->priority < cur_prio)
3466 continue;
3467
3468 if (skb->priority > cur_prio) {
3469 num = 0;
3470 min = ~0;
3471 cur_prio = skb->priority;
3472 }
3473
3474 num++;
3475
3476 if (conn->sent < min) {
3477 min = conn->sent;
3478 chan = tmp;
3479 }
3480 }
3481
3482 if (hci_conn_num(hdev, type) == conn_num)
3483 break;
3484 }
3485
3486 rcu_read_unlock();
3487
3488 if (!chan)
3489 return NULL;
3490
3491 hci_quote_sent(chan->conn, num, quote);
3492
3493 BT_DBG("chan %p quote %d", chan, *quote);
3494 return chan;
3495}
3496
3497static void hci_prio_recalculate(struct hci_dev *hdev, __u8 type)
3498{
3499 struct hci_conn_hash *h = &hdev->conn_hash;
3500 struct hci_conn *conn;
3501 int num = 0;
3502
3503 BT_DBG("%s", hdev->name);
3504
3505 rcu_read_lock();
3506
3507 list_for_each_entry_rcu(conn, &h->list, list) {
3508 struct hci_chan *chan;
3509
3510 if (conn->type != type)
3511 continue;
3512
3513 if (conn->state != BT_CONNECTED && conn->state != BT_CONFIG)
3514 continue;
3515
3516 num++;
3517
3518 list_for_each_entry_rcu(chan, &conn->chan_list, list) {
3519 struct sk_buff *skb;
3520
3521 if (chan->sent) {
3522 chan->sent = 0;
3523 continue;
3524 }
3525
3526 if (skb_queue_empty(&chan->data_q))
3527 continue;
3528
3529 skb = skb_peek(&chan->data_q);
3530 if (skb->priority >= HCI_PRIO_MAX - 1)
3531 continue;
3532
3533 skb->priority = HCI_PRIO_MAX - 1;
3534
3535 BT_DBG("chan %p skb %p promoted to %d", chan, skb,
3536 skb->priority);
3537 }
3538
3539 if (hci_conn_num(hdev, type) == num)
3540 break;
3541 }
3542
3543 rcu_read_unlock();
3544
3545}
3546
3547static void __check_timeout(struct hci_dev *hdev, unsigned int cnt, u8 type)
3548{
3549 unsigned long last_tx;
3550
3551 if (hci_dev_test_flag(hdev, HCI_UNCONFIGURED))
3552 return;
3553
3554 switch (type) {
3555 case LE_LINK:
3556 last_tx = hdev->le_last_tx;
3557 break;
3558 default:
3559 last_tx = hdev->acl_last_tx;
3560 break;
3561 }
3562
3563 /* tx timeout must be longer than maximum link supervision timeout
3564 * (40.9 seconds)
3565 */
3566 if (!cnt && time_after(jiffies, last_tx + HCI_ACL_TX_TIMEOUT))
3567 hci_link_tx_to(hdev, type);
3568}
3569
3570/* Schedule SCO */
3571static void hci_sched_sco(struct hci_dev *hdev)
3572{
3573 struct hci_conn *conn;
3574 struct sk_buff *skb;
3575 int quote;
3576
3577 BT_DBG("%s", hdev->name);
3578
3579 if (!hci_conn_num(hdev, SCO_LINK))
3580 return;
3581
3582 while (hdev->sco_cnt && (conn = hci_low_sent(hdev, SCO_LINK, "e))) {
3583 while (quote-- && (skb = skb_dequeue(&conn->data_q))) {
3584 BT_DBG("skb %p len %d", skb, skb->len);
3585 hci_send_frame(hdev, skb);
3586
3587 conn->sent++;
3588 if (conn->sent == ~0)
3589 conn->sent = 0;
3590 }
3591 }
3592}
3593
3594static void hci_sched_esco(struct hci_dev *hdev)
3595{
3596 struct hci_conn *conn;
3597 struct sk_buff *skb;
3598 int quote;
3599
3600 BT_DBG("%s", hdev->name);
3601
3602 if (!hci_conn_num(hdev, ESCO_LINK))
3603 return;
3604
3605 while (hdev->sco_cnt && (conn = hci_low_sent(hdev, ESCO_LINK,
3606 "e))) {
3607 while (quote-- && (skb = skb_dequeue(&conn->data_q))) {
3608 BT_DBG("skb %p len %d", skb, skb->len);
3609 hci_send_frame(hdev, skb);
3610
3611 conn->sent++;
3612 if (conn->sent == ~0)
3613 conn->sent = 0;
3614 }
3615 }
3616}
3617
3618static void hci_sched_acl_pkt(struct hci_dev *hdev)
3619{
3620 unsigned int cnt = hdev->acl_cnt;
3621 struct hci_chan *chan;
3622 struct sk_buff *skb;
3623 int quote;
3624
3625 __check_timeout(hdev, cnt, ACL_LINK);
3626
3627 while (hdev->acl_cnt &&
3628 (chan = hci_chan_sent(hdev, ACL_LINK, "e))) {
3629 u32 priority = (skb_peek(&chan->data_q))->priority;
3630 while (quote-- && (skb = skb_peek(&chan->data_q))) {
3631 BT_DBG("chan %p skb %p len %d priority %u", chan, skb,
3632 skb->len, skb->priority);
3633
3634 /* Stop if priority has changed */
3635 if (skb->priority < priority)
3636 break;
3637
3638 skb = skb_dequeue(&chan->data_q);
3639
3640 hci_conn_enter_active_mode(chan->conn,
3641 bt_cb(skb)->force_active);
3642
3643 hci_send_frame(hdev, skb);
3644 hdev->acl_last_tx = jiffies;
3645
3646 hdev->acl_cnt--;
3647 chan->sent++;
3648 chan->conn->sent++;
3649
3650 /* Send pending SCO packets right away */
3651 hci_sched_sco(hdev);
3652 hci_sched_esco(hdev);
3653 }
3654 }
3655
3656 if (cnt != hdev->acl_cnt)
3657 hci_prio_recalculate(hdev, ACL_LINK);
3658}
3659
3660static void hci_sched_acl(struct hci_dev *hdev)
3661{
3662 BT_DBG("%s", hdev->name);
3663
3664 /* No ACL link over BR/EDR controller */
3665 if (!hci_conn_num(hdev, ACL_LINK))
3666 return;
3667
3668 hci_sched_acl_pkt(hdev);
3669}
3670
3671static void hci_sched_le(struct hci_dev *hdev)
3672{
3673 struct hci_chan *chan;
3674 struct sk_buff *skb;
3675 int quote, *cnt, tmp;
3676
3677 BT_DBG("%s", hdev->name);
3678
3679 if (!hci_conn_num(hdev, LE_LINK))
3680 return;
3681
3682 cnt = hdev->le_pkts ? &hdev->le_cnt : &hdev->acl_cnt;
3683
3684 __check_timeout(hdev, *cnt, LE_LINK);
3685
3686 tmp = *cnt;
3687 while (*cnt && (chan = hci_chan_sent(hdev, LE_LINK, "e))) {
3688 u32 priority = (skb_peek(&chan->data_q))->priority;
3689 while (quote-- && (skb = skb_peek(&chan->data_q))) {
3690 BT_DBG("chan %p skb %p len %d priority %u", chan, skb,
3691 skb->len, skb->priority);
3692
3693 /* Stop if priority has changed */
3694 if (skb->priority < priority)
3695 break;
3696
3697 skb = skb_dequeue(&chan->data_q);
3698
3699 hci_send_frame(hdev, skb);
3700 hdev->le_last_tx = jiffies;
3701
3702 (*cnt)--;
3703 chan->sent++;
3704 chan->conn->sent++;
3705
3706 /* Send pending SCO packets right away */
3707 hci_sched_sco(hdev);
3708 hci_sched_esco(hdev);
3709 }
3710 }
3711
3712 if (*cnt != tmp)
3713 hci_prio_recalculate(hdev, LE_LINK);
3714}
3715
3716/* Schedule CIS */
3717static void hci_sched_iso(struct hci_dev *hdev)
3718{
3719 struct hci_conn *conn;
3720 struct sk_buff *skb;
3721 int quote, *cnt;
3722
3723 BT_DBG("%s", hdev->name);
3724
3725 if (!hci_conn_num(hdev, ISO_LINK))
3726 return;
3727
3728 cnt = hdev->iso_pkts ? &hdev->iso_cnt :
3729 hdev->le_pkts ? &hdev->le_cnt : &hdev->acl_cnt;
3730 while (*cnt && (conn = hci_low_sent(hdev, ISO_LINK, "e))) {
3731 while (quote-- && (skb = skb_dequeue(&conn->data_q))) {
3732 BT_DBG("skb %p len %d", skb, skb->len);
3733 hci_send_frame(hdev, skb);
3734
3735 conn->sent++;
3736 if (conn->sent == ~0)
3737 conn->sent = 0;
3738 (*cnt)--;
3739 }
3740 }
3741}
3742
3743static void hci_tx_work(struct work_struct *work)
3744{
3745 struct hci_dev *hdev = container_of(work, struct hci_dev, tx_work);
3746 struct sk_buff *skb;
3747
3748 BT_DBG("%s acl %d sco %d le %d iso %d", hdev->name, hdev->acl_cnt,
3749 hdev->sco_cnt, hdev->le_cnt, hdev->iso_cnt);
3750
3751 if (!hci_dev_test_flag(hdev, HCI_USER_CHANNEL)) {
3752 /* Schedule queues and send stuff to HCI driver */
3753 hci_sched_sco(hdev);
3754 hci_sched_esco(hdev);
3755 hci_sched_iso(hdev);
3756 hci_sched_acl(hdev);
3757 hci_sched_le(hdev);
3758 }
3759
3760 /* Send next queued raw (unknown type) packet */
3761 while ((skb = skb_dequeue(&hdev->raw_q)))
3762 hci_send_frame(hdev, skb);
3763}
3764
3765/* ----- HCI RX task (incoming data processing) ----- */
3766
3767/* ACL data packet */
3768static void hci_acldata_packet(struct hci_dev *hdev, struct sk_buff *skb)
3769{
3770 struct hci_acl_hdr *hdr;
3771 struct hci_conn *conn;
3772 __u16 handle, flags;
3773
3774 hdr = skb_pull_data(skb, sizeof(*hdr));
3775 if (!hdr) {
3776 bt_dev_err(hdev, "ACL packet too small");
3777 goto drop;
3778 }
3779
3780 handle = __le16_to_cpu(hdr->handle);
3781 flags = hci_flags(handle);
3782 handle = hci_handle(handle);
3783
3784 bt_dev_dbg(hdev, "len %d handle 0x%4.4x flags 0x%4.4x", skb->len,
3785 handle, flags);
3786
3787 hdev->stat.acl_rx++;
3788
3789 hci_dev_lock(hdev);
3790 conn = hci_conn_hash_lookup_handle(hdev, handle);
3791 hci_dev_unlock(hdev);
3792
3793 if (conn) {
3794 hci_conn_enter_active_mode(conn, BT_POWER_FORCE_ACTIVE_OFF);
3795
3796 /* Send to upper protocol */
3797 l2cap_recv_acldata(conn, skb, flags);
3798 return;
3799 } else {
3800 bt_dev_err(hdev, "ACL packet for unknown connection handle %d",
3801 handle);
3802 }
3803
3804drop:
3805 kfree_skb(skb);
3806}
3807
3808/* SCO data packet */
3809static void hci_scodata_packet(struct hci_dev *hdev, struct sk_buff *skb)
3810{
3811 struct hci_sco_hdr *hdr;
3812 struct hci_conn *conn;
3813 __u16 handle, flags;
3814
3815 hdr = skb_pull_data(skb, sizeof(*hdr));
3816 if (!hdr) {
3817 bt_dev_err(hdev, "SCO packet too small");
3818 goto drop;
3819 }
3820
3821 handle = __le16_to_cpu(hdr->handle);
3822 flags = hci_flags(handle);
3823 handle = hci_handle(handle);
3824
3825 bt_dev_dbg(hdev, "len %d handle 0x%4.4x flags 0x%4.4x", skb->len,
3826 handle, flags);
3827
3828 hdev->stat.sco_rx++;
3829
3830 hci_dev_lock(hdev);
3831 conn = hci_conn_hash_lookup_handle(hdev, handle);
3832 hci_dev_unlock(hdev);
3833
3834 if (conn) {
3835 /* Send to upper protocol */
3836 hci_skb_pkt_status(skb) = flags & 0x03;
3837 sco_recv_scodata(conn, skb);
3838 return;
3839 } else {
3840 bt_dev_err_ratelimited(hdev, "SCO packet for unknown connection handle %d",
3841 handle);
3842 }
3843
3844drop:
3845 kfree_skb(skb);
3846}
3847
3848static void hci_isodata_packet(struct hci_dev *hdev, struct sk_buff *skb)
3849{
3850 struct hci_iso_hdr *hdr;
3851 struct hci_conn *conn;
3852 __u16 handle, flags;
3853
3854 hdr = skb_pull_data(skb, sizeof(*hdr));
3855 if (!hdr) {
3856 bt_dev_err(hdev, "ISO packet too small");
3857 goto drop;
3858 }
3859
3860 handle = __le16_to_cpu(hdr->handle);
3861 flags = hci_flags(handle);
3862 handle = hci_handle(handle);
3863
3864 bt_dev_dbg(hdev, "len %d handle 0x%4.4x flags 0x%4.4x", skb->len,
3865 handle, flags);
3866
3867 hci_dev_lock(hdev);
3868 conn = hci_conn_hash_lookup_handle(hdev, handle);
3869 hci_dev_unlock(hdev);
3870
3871 if (!conn) {
3872 bt_dev_err(hdev, "ISO packet for unknown connection handle %d",
3873 handle);
3874 goto drop;
3875 }
3876
3877 /* Send to upper protocol */
3878 iso_recv(conn, skb, flags);
3879 return;
3880
3881drop:
3882 kfree_skb(skb);
3883}
3884
3885static bool hci_req_is_complete(struct hci_dev *hdev)
3886{
3887 struct sk_buff *skb;
3888
3889 skb = skb_peek(&hdev->cmd_q);
3890 if (!skb)
3891 return true;
3892
3893 return (bt_cb(skb)->hci.req_flags & HCI_REQ_START);
3894}
3895
3896static void hci_resend_last(struct hci_dev *hdev)
3897{
3898 struct hci_command_hdr *sent;
3899 struct sk_buff *skb;
3900 u16 opcode;
3901
3902 if (!hdev->sent_cmd)
3903 return;
3904
3905 sent = (void *) hdev->sent_cmd->data;
3906 opcode = __le16_to_cpu(sent->opcode);
3907 if (opcode == HCI_OP_RESET)
3908 return;
3909
3910 skb = skb_clone(hdev->sent_cmd, GFP_KERNEL);
3911 if (!skb)
3912 return;
3913
3914 skb_queue_head(&hdev->cmd_q, skb);
3915 queue_work(hdev->workqueue, &hdev->cmd_work);
3916}
3917
3918void hci_req_cmd_complete(struct hci_dev *hdev, u16 opcode, u8 status,
3919 hci_req_complete_t *req_complete,
3920 hci_req_complete_skb_t *req_complete_skb)
3921{
3922 struct sk_buff *skb;
3923 unsigned long flags;
3924
3925 BT_DBG("opcode 0x%04x status 0x%02x", opcode, status);
3926
3927 /* If the completed command doesn't match the last one that was
3928 * sent we need to do special handling of it.
3929 */
3930 if (!hci_sent_cmd_data(hdev, opcode)) {
3931 /* Some CSR based controllers generate a spontaneous
3932 * reset complete event during init and any pending
3933 * command will never be completed. In such a case we
3934 * need to resend whatever was the last sent
3935 * command.
3936 */
3937 if (test_bit(HCI_INIT, &hdev->flags) && opcode == HCI_OP_RESET)
3938 hci_resend_last(hdev);
3939
3940 return;
3941 }
3942
3943 /* If we reach this point this event matches the last command sent */
3944 hci_dev_clear_flag(hdev, HCI_CMD_PENDING);
3945
3946 /* If the command succeeded and there's still more commands in
3947 * this request the request is not yet complete.
3948 */
3949 if (!status && !hci_req_is_complete(hdev))
3950 return;
3951
3952 skb = hdev->req_skb;
3953
3954 /* If this was the last command in a request the complete
3955 * callback would be found in hdev->req_skb instead of the
3956 * command queue (hdev->cmd_q).
3957 */
3958 if (skb && bt_cb(skb)->hci.req_flags & HCI_REQ_SKB) {
3959 *req_complete_skb = bt_cb(skb)->hci.req_complete_skb;
3960 return;
3961 }
3962
3963 if (skb && bt_cb(skb)->hci.req_complete) {
3964 *req_complete = bt_cb(skb)->hci.req_complete;
3965 return;
3966 }
3967
3968 /* Remove all pending commands belonging to this request */
3969 spin_lock_irqsave(&hdev->cmd_q.lock, flags);
3970 while ((skb = __skb_dequeue(&hdev->cmd_q))) {
3971 if (bt_cb(skb)->hci.req_flags & HCI_REQ_START) {
3972 __skb_queue_head(&hdev->cmd_q, skb);
3973 break;
3974 }
3975
3976 if (bt_cb(skb)->hci.req_flags & HCI_REQ_SKB)
3977 *req_complete_skb = bt_cb(skb)->hci.req_complete_skb;
3978 else
3979 *req_complete = bt_cb(skb)->hci.req_complete;
3980 dev_kfree_skb_irq(skb);
3981 }
3982 spin_unlock_irqrestore(&hdev->cmd_q.lock, flags);
3983}
3984
3985static void hci_rx_work(struct work_struct *work)
3986{
3987 struct hci_dev *hdev = container_of(work, struct hci_dev, rx_work);
3988 struct sk_buff *skb;
3989
3990 BT_DBG("%s", hdev->name);
3991
3992 /* The kcov_remote functions used for collecting packet parsing
3993 * coverage information from this background thread and associate
3994 * the coverage with the syscall's thread which originally injected
3995 * the packet. This helps fuzzing the kernel.
3996 */
3997 for (; (skb = skb_dequeue(&hdev->rx_q)); kcov_remote_stop()) {
3998 kcov_remote_start_common(skb_get_kcov_handle(skb));
3999
4000 /* Send copy to monitor */
4001 hci_send_to_monitor(hdev, skb);
4002
4003 if (atomic_read(&hdev->promisc)) {
4004 /* Send copy to the sockets */
4005 hci_send_to_sock(hdev, skb);
4006 }
4007
4008 /* If the device has been opened in HCI_USER_CHANNEL,
4009 * the userspace has exclusive access to device.
4010 * When device is HCI_INIT, we still need to process
4011 * the data packets to the driver in order
4012 * to complete its setup().
4013 */
4014 if (hci_dev_test_flag(hdev, HCI_USER_CHANNEL) &&
4015 !test_bit(HCI_INIT, &hdev->flags)) {
4016 kfree_skb(skb);
4017 continue;
4018 }
4019
4020 if (test_bit(HCI_INIT, &hdev->flags)) {
4021 /* Don't process data packets in this states. */
4022 switch (hci_skb_pkt_type(skb)) {
4023 case HCI_ACLDATA_PKT:
4024 case HCI_SCODATA_PKT:
4025 case HCI_ISODATA_PKT:
4026 kfree_skb(skb);
4027 continue;
4028 }
4029 }
4030
4031 /* Process frame */
4032 switch (hci_skb_pkt_type(skb)) {
4033 case HCI_EVENT_PKT:
4034 BT_DBG("%s Event packet", hdev->name);
4035 hci_event_packet(hdev, skb);
4036 break;
4037
4038 case HCI_ACLDATA_PKT:
4039 BT_DBG("%s ACL data packet", hdev->name);
4040 hci_acldata_packet(hdev, skb);
4041 break;
4042
4043 case HCI_SCODATA_PKT:
4044 BT_DBG("%s SCO data packet", hdev->name);
4045 hci_scodata_packet(hdev, skb);
4046 break;
4047
4048 case HCI_ISODATA_PKT:
4049 BT_DBG("%s ISO data packet", hdev->name);
4050 hci_isodata_packet(hdev, skb);
4051 break;
4052
4053 default:
4054 kfree_skb(skb);
4055 break;
4056 }
4057 }
4058}
4059
4060static void hci_send_cmd_sync(struct hci_dev *hdev, struct sk_buff *skb)
4061{
4062 int err;
4063
4064 bt_dev_dbg(hdev, "skb %p", skb);
4065
4066 kfree_skb(hdev->sent_cmd);
4067
4068 hdev->sent_cmd = skb_clone(skb, GFP_KERNEL);
4069 if (!hdev->sent_cmd) {
4070 skb_queue_head(&hdev->cmd_q, skb);
4071 queue_work(hdev->workqueue, &hdev->cmd_work);
4072 return;
4073 }
4074
4075 err = hci_send_frame(hdev, skb);
4076 if (err < 0) {
4077 hci_cmd_sync_cancel_sync(hdev, -err);
4078 return;
4079 }
4080
4081 if (hdev->req_status == HCI_REQ_PEND &&
4082 !hci_dev_test_and_set_flag(hdev, HCI_CMD_PENDING)) {
4083 kfree_skb(hdev->req_skb);
4084 hdev->req_skb = skb_clone(hdev->sent_cmd, GFP_KERNEL);
4085 }
4086
4087 atomic_dec(&hdev->cmd_cnt);
4088}
4089
4090static void hci_cmd_work(struct work_struct *work)
4091{
4092 struct hci_dev *hdev = container_of(work, struct hci_dev, cmd_work);
4093 struct sk_buff *skb;
4094
4095 BT_DBG("%s cmd_cnt %d cmd queued %d", hdev->name,
4096 atomic_read(&hdev->cmd_cnt), skb_queue_len(&hdev->cmd_q));
4097
4098 /* Send queued commands */
4099 if (atomic_read(&hdev->cmd_cnt)) {
4100 skb = skb_dequeue(&hdev->cmd_q);
4101 if (!skb)
4102 return;
4103
4104 hci_send_cmd_sync(hdev, skb);
4105
4106 rcu_read_lock();
4107 if (test_bit(HCI_RESET, &hdev->flags) ||
4108 hci_dev_test_flag(hdev, HCI_CMD_DRAIN_WORKQUEUE))
4109 cancel_delayed_work(&hdev->cmd_timer);
4110 else
4111 queue_delayed_work(hdev->workqueue, &hdev->cmd_timer,
4112 HCI_CMD_TIMEOUT);
4113 rcu_read_unlock();
4114 }
4115}
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/idr.h>
30#include <linux/rfkill.h>
31#include <linux/debugfs.h>
32#include <linux/crypto.h>
33#include <asm/unaligned.h>
34
35#include <net/bluetooth/bluetooth.h>
36#include <net/bluetooth/hci_core.h>
37
38#include "smp.h"
39
40static void hci_rx_work(struct work_struct *work);
41static void hci_cmd_work(struct work_struct *work);
42static void hci_tx_work(struct work_struct *work);
43
44/* HCI device list */
45LIST_HEAD(hci_dev_list);
46DEFINE_RWLOCK(hci_dev_list_lock);
47
48/* HCI callback list */
49LIST_HEAD(hci_cb_list);
50DEFINE_RWLOCK(hci_cb_list_lock);
51
52/* HCI ID Numbering */
53static DEFINE_IDA(hci_index_ida);
54
55/* ---- HCI notifications ---- */
56
57static void hci_notify(struct hci_dev *hdev, int event)
58{
59 hci_sock_dev_event(hdev, event);
60}
61
62/* ---- HCI debugfs entries ---- */
63
64static ssize_t dut_mode_read(struct file *file, char __user *user_buf,
65 size_t count, loff_t *ppos)
66{
67 struct hci_dev *hdev = file->private_data;
68 char buf[3];
69
70 buf[0] = test_bit(HCI_DUT_MODE, &hdev->dev_flags) ? 'Y': 'N';
71 buf[1] = '\n';
72 buf[2] = '\0';
73 return simple_read_from_buffer(user_buf, count, ppos, buf, 2);
74}
75
76static ssize_t dut_mode_write(struct file *file, const char __user *user_buf,
77 size_t count, loff_t *ppos)
78{
79 struct hci_dev *hdev = file->private_data;
80 struct sk_buff *skb;
81 char buf[32];
82 size_t buf_size = min(count, (sizeof(buf)-1));
83 bool enable;
84 int err;
85
86 if (!test_bit(HCI_UP, &hdev->flags))
87 return -ENETDOWN;
88
89 if (copy_from_user(buf, user_buf, buf_size))
90 return -EFAULT;
91
92 buf[buf_size] = '\0';
93 if (strtobool(buf, &enable))
94 return -EINVAL;
95
96 if (enable == test_bit(HCI_DUT_MODE, &hdev->dev_flags))
97 return -EALREADY;
98
99 hci_req_lock(hdev);
100 if (enable)
101 skb = __hci_cmd_sync(hdev, HCI_OP_ENABLE_DUT_MODE, 0, NULL,
102 HCI_CMD_TIMEOUT);
103 else
104 skb = __hci_cmd_sync(hdev, HCI_OP_RESET, 0, NULL,
105 HCI_CMD_TIMEOUT);
106 hci_req_unlock(hdev);
107
108 if (IS_ERR(skb))
109 return PTR_ERR(skb);
110
111 err = -bt_to_errno(skb->data[0]);
112 kfree_skb(skb);
113
114 if (err < 0)
115 return err;
116
117 change_bit(HCI_DUT_MODE, &hdev->dev_flags);
118
119 return count;
120}
121
122static const struct file_operations dut_mode_fops = {
123 .open = simple_open,
124 .read = dut_mode_read,
125 .write = dut_mode_write,
126 .llseek = default_llseek,
127};
128
129static int features_show(struct seq_file *f, void *ptr)
130{
131 struct hci_dev *hdev = f->private;
132 u8 p;
133
134 hci_dev_lock(hdev);
135 for (p = 0; p < HCI_MAX_PAGES && p <= hdev->max_page; p++) {
136 seq_printf(f, "%2u: 0x%2.2x 0x%2.2x 0x%2.2x 0x%2.2x "
137 "0x%2.2x 0x%2.2x 0x%2.2x 0x%2.2x\n", p,
138 hdev->features[p][0], hdev->features[p][1],
139 hdev->features[p][2], hdev->features[p][3],
140 hdev->features[p][4], hdev->features[p][5],
141 hdev->features[p][6], hdev->features[p][7]);
142 }
143 if (lmp_le_capable(hdev))
144 seq_printf(f, "LE: 0x%2.2x 0x%2.2x 0x%2.2x 0x%2.2x "
145 "0x%2.2x 0x%2.2x 0x%2.2x 0x%2.2x\n",
146 hdev->le_features[0], hdev->le_features[1],
147 hdev->le_features[2], hdev->le_features[3],
148 hdev->le_features[4], hdev->le_features[5],
149 hdev->le_features[6], hdev->le_features[7]);
150 hci_dev_unlock(hdev);
151
152 return 0;
153}
154
155static int features_open(struct inode *inode, struct file *file)
156{
157 return single_open(file, features_show, inode->i_private);
158}
159
160static const struct file_operations features_fops = {
161 .open = features_open,
162 .read = seq_read,
163 .llseek = seq_lseek,
164 .release = single_release,
165};
166
167static int blacklist_show(struct seq_file *f, void *p)
168{
169 struct hci_dev *hdev = f->private;
170 struct bdaddr_list *b;
171
172 hci_dev_lock(hdev);
173 list_for_each_entry(b, &hdev->blacklist, list)
174 seq_printf(f, "%pMR (type %u)\n", &b->bdaddr, b->bdaddr_type);
175 hci_dev_unlock(hdev);
176
177 return 0;
178}
179
180static int blacklist_open(struct inode *inode, struct file *file)
181{
182 return single_open(file, blacklist_show, inode->i_private);
183}
184
185static const struct file_operations blacklist_fops = {
186 .open = blacklist_open,
187 .read = seq_read,
188 .llseek = seq_lseek,
189 .release = single_release,
190};
191
192static int uuids_show(struct seq_file *f, void *p)
193{
194 struct hci_dev *hdev = f->private;
195 struct bt_uuid *uuid;
196
197 hci_dev_lock(hdev);
198 list_for_each_entry(uuid, &hdev->uuids, list) {
199 u8 i, val[16];
200
201 /* The Bluetooth UUID values are stored in big endian,
202 * but with reversed byte order. So convert them into
203 * the right order for the %pUb modifier.
204 */
205 for (i = 0; i < 16; i++)
206 val[i] = uuid->uuid[15 - i];
207
208 seq_printf(f, "%pUb\n", val);
209 }
210 hci_dev_unlock(hdev);
211
212 return 0;
213}
214
215static int uuids_open(struct inode *inode, struct file *file)
216{
217 return single_open(file, uuids_show, inode->i_private);
218}
219
220static const struct file_operations uuids_fops = {
221 .open = uuids_open,
222 .read = seq_read,
223 .llseek = seq_lseek,
224 .release = single_release,
225};
226
227static int inquiry_cache_show(struct seq_file *f, void *p)
228{
229 struct hci_dev *hdev = f->private;
230 struct discovery_state *cache = &hdev->discovery;
231 struct inquiry_entry *e;
232
233 hci_dev_lock(hdev);
234
235 list_for_each_entry(e, &cache->all, all) {
236 struct inquiry_data *data = &e->data;
237 seq_printf(f, "%pMR %d %d %d 0x%.2x%.2x%.2x 0x%.4x %d %d %u\n",
238 &data->bdaddr,
239 data->pscan_rep_mode, data->pscan_period_mode,
240 data->pscan_mode, data->dev_class[2],
241 data->dev_class[1], data->dev_class[0],
242 __le16_to_cpu(data->clock_offset),
243 data->rssi, data->ssp_mode, e->timestamp);
244 }
245
246 hci_dev_unlock(hdev);
247
248 return 0;
249}
250
251static int inquiry_cache_open(struct inode *inode, struct file *file)
252{
253 return single_open(file, inquiry_cache_show, inode->i_private);
254}
255
256static const struct file_operations inquiry_cache_fops = {
257 .open = inquiry_cache_open,
258 .read = seq_read,
259 .llseek = seq_lseek,
260 .release = single_release,
261};
262
263static int link_keys_show(struct seq_file *f, void *ptr)
264{
265 struct hci_dev *hdev = f->private;
266 struct list_head *p, *n;
267
268 hci_dev_lock(hdev);
269 list_for_each_safe(p, n, &hdev->link_keys) {
270 struct link_key *key = list_entry(p, struct link_key, list);
271 seq_printf(f, "%pMR %u %*phN %u\n", &key->bdaddr, key->type,
272 HCI_LINK_KEY_SIZE, key->val, key->pin_len);
273 }
274 hci_dev_unlock(hdev);
275
276 return 0;
277}
278
279static int link_keys_open(struct inode *inode, struct file *file)
280{
281 return single_open(file, link_keys_show, inode->i_private);
282}
283
284static const struct file_operations link_keys_fops = {
285 .open = link_keys_open,
286 .read = seq_read,
287 .llseek = seq_lseek,
288 .release = single_release,
289};
290
291static int dev_class_show(struct seq_file *f, void *ptr)
292{
293 struct hci_dev *hdev = f->private;
294
295 hci_dev_lock(hdev);
296 seq_printf(f, "0x%.2x%.2x%.2x\n", hdev->dev_class[2],
297 hdev->dev_class[1], hdev->dev_class[0]);
298 hci_dev_unlock(hdev);
299
300 return 0;
301}
302
303static int dev_class_open(struct inode *inode, struct file *file)
304{
305 return single_open(file, dev_class_show, inode->i_private);
306}
307
308static const struct file_operations dev_class_fops = {
309 .open = dev_class_open,
310 .read = seq_read,
311 .llseek = seq_lseek,
312 .release = single_release,
313};
314
315static int voice_setting_get(void *data, u64 *val)
316{
317 struct hci_dev *hdev = data;
318
319 hci_dev_lock(hdev);
320 *val = hdev->voice_setting;
321 hci_dev_unlock(hdev);
322
323 return 0;
324}
325
326DEFINE_SIMPLE_ATTRIBUTE(voice_setting_fops, voice_setting_get,
327 NULL, "0x%4.4llx\n");
328
329static int auto_accept_delay_set(void *data, u64 val)
330{
331 struct hci_dev *hdev = data;
332
333 hci_dev_lock(hdev);
334 hdev->auto_accept_delay = val;
335 hci_dev_unlock(hdev);
336
337 return 0;
338}
339
340static int auto_accept_delay_get(void *data, u64 *val)
341{
342 struct hci_dev *hdev = data;
343
344 hci_dev_lock(hdev);
345 *val = hdev->auto_accept_delay;
346 hci_dev_unlock(hdev);
347
348 return 0;
349}
350
351DEFINE_SIMPLE_ATTRIBUTE(auto_accept_delay_fops, auto_accept_delay_get,
352 auto_accept_delay_set, "%llu\n");
353
354static int ssp_debug_mode_set(void *data, u64 val)
355{
356 struct hci_dev *hdev = data;
357 struct sk_buff *skb;
358 __u8 mode;
359 int err;
360
361 if (val != 0 && val != 1)
362 return -EINVAL;
363
364 if (!test_bit(HCI_UP, &hdev->flags))
365 return -ENETDOWN;
366
367 hci_req_lock(hdev);
368 mode = val;
369 skb = __hci_cmd_sync(hdev, HCI_OP_WRITE_SSP_DEBUG_MODE, sizeof(mode),
370 &mode, HCI_CMD_TIMEOUT);
371 hci_req_unlock(hdev);
372
373 if (IS_ERR(skb))
374 return PTR_ERR(skb);
375
376 err = -bt_to_errno(skb->data[0]);
377 kfree_skb(skb);
378
379 if (err < 0)
380 return err;
381
382 hci_dev_lock(hdev);
383 hdev->ssp_debug_mode = val;
384 hci_dev_unlock(hdev);
385
386 return 0;
387}
388
389static int ssp_debug_mode_get(void *data, u64 *val)
390{
391 struct hci_dev *hdev = data;
392
393 hci_dev_lock(hdev);
394 *val = hdev->ssp_debug_mode;
395 hci_dev_unlock(hdev);
396
397 return 0;
398}
399
400DEFINE_SIMPLE_ATTRIBUTE(ssp_debug_mode_fops, ssp_debug_mode_get,
401 ssp_debug_mode_set, "%llu\n");
402
403static ssize_t force_sc_support_read(struct file *file, char __user *user_buf,
404 size_t count, loff_t *ppos)
405{
406 struct hci_dev *hdev = file->private_data;
407 char buf[3];
408
409 buf[0] = test_bit(HCI_FORCE_SC, &hdev->dev_flags) ? 'Y': 'N';
410 buf[1] = '\n';
411 buf[2] = '\0';
412 return simple_read_from_buffer(user_buf, count, ppos, buf, 2);
413}
414
415static ssize_t force_sc_support_write(struct file *file,
416 const char __user *user_buf,
417 size_t count, loff_t *ppos)
418{
419 struct hci_dev *hdev = file->private_data;
420 char buf[32];
421 size_t buf_size = min(count, (sizeof(buf)-1));
422 bool enable;
423
424 if (test_bit(HCI_UP, &hdev->flags))
425 return -EBUSY;
426
427 if (copy_from_user(buf, user_buf, buf_size))
428 return -EFAULT;
429
430 buf[buf_size] = '\0';
431 if (strtobool(buf, &enable))
432 return -EINVAL;
433
434 if (enable == test_bit(HCI_FORCE_SC, &hdev->dev_flags))
435 return -EALREADY;
436
437 change_bit(HCI_FORCE_SC, &hdev->dev_flags);
438
439 return count;
440}
441
442static const struct file_operations force_sc_support_fops = {
443 .open = simple_open,
444 .read = force_sc_support_read,
445 .write = force_sc_support_write,
446 .llseek = default_llseek,
447};
448
449static ssize_t sc_only_mode_read(struct file *file, char __user *user_buf,
450 size_t count, loff_t *ppos)
451{
452 struct hci_dev *hdev = file->private_data;
453 char buf[3];
454
455 buf[0] = test_bit(HCI_SC_ONLY, &hdev->dev_flags) ? 'Y': 'N';
456 buf[1] = '\n';
457 buf[2] = '\0';
458 return simple_read_from_buffer(user_buf, count, ppos, buf, 2);
459}
460
461static const struct file_operations sc_only_mode_fops = {
462 .open = simple_open,
463 .read = sc_only_mode_read,
464 .llseek = default_llseek,
465};
466
467static int idle_timeout_set(void *data, u64 val)
468{
469 struct hci_dev *hdev = data;
470
471 if (val != 0 && (val < 500 || val > 3600000))
472 return -EINVAL;
473
474 hci_dev_lock(hdev);
475 hdev->idle_timeout = val;
476 hci_dev_unlock(hdev);
477
478 return 0;
479}
480
481static int idle_timeout_get(void *data, u64 *val)
482{
483 struct hci_dev *hdev = data;
484
485 hci_dev_lock(hdev);
486 *val = hdev->idle_timeout;
487 hci_dev_unlock(hdev);
488
489 return 0;
490}
491
492DEFINE_SIMPLE_ATTRIBUTE(idle_timeout_fops, idle_timeout_get,
493 idle_timeout_set, "%llu\n");
494
495static int rpa_timeout_set(void *data, u64 val)
496{
497 struct hci_dev *hdev = data;
498
499 /* Require the RPA timeout to be at least 30 seconds and at most
500 * 24 hours.
501 */
502 if (val < 30 || val > (60 * 60 * 24))
503 return -EINVAL;
504
505 hci_dev_lock(hdev);
506 hdev->rpa_timeout = val;
507 hci_dev_unlock(hdev);
508
509 return 0;
510}
511
512static int rpa_timeout_get(void *data, u64 *val)
513{
514 struct hci_dev *hdev = data;
515
516 hci_dev_lock(hdev);
517 *val = hdev->rpa_timeout;
518 hci_dev_unlock(hdev);
519
520 return 0;
521}
522
523DEFINE_SIMPLE_ATTRIBUTE(rpa_timeout_fops, rpa_timeout_get,
524 rpa_timeout_set, "%llu\n");
525
526static int sniff_min_interval_set(void *data, u64 val)
527{
528 struct hci_dev *hdev = data;
529
530 if (val == 0 || val % 2 || val > hdev->sniff_max_interval)
531 return -EINVAL;
532
533 hci_dev_lock(hdev);
534 hdev->sniff_min_interval = val;
535 hci_dev_unlock(hdev);
536
537 return 0;
538}
539
540static int sniff_min_interval_get(void *data, u64 *val)
541{
542 struct hci_dev *hdev = data;
543
544 hci_dev_lock(hdev);
545 *val = hdev->sniff_min_interval;
546 hci_dev_unlock(hdev);
547
548 return 0;
549}
550
551DEFINE_SIMPLE_ATTRIBUTE(sniff_min_interval_fops, sniff_min_interval_get,
552 sniff_min_interval_set, "%llu\n");
553
554static int sniff_max_interval_set(void *data, u64 val)
555{
556 struct hci_dev *hdev = data;
557
558 if (val == 0 || val % 2 || val < hdev->sniff_min_interval)
559 return -EINVAL;
560
561 hci_dev_lock(hdev);
562 hdev->sniff_max_interval = val;
563 hci_dev_unlock(hdev);
564
565 return 0;
566}
567
568static int sniff_max_interval_get(void *data, u64 *val)
569{
570 struct hci_dev *hdev = data;
571
572 hci_dev_lock(hdev);
573 *val = hdev->sniff_max_interval;
574 hci_dev_unlock(hdev);
575
576 return 0;
577}
578
579DEFINE_SIMPLE_ATTRIBUTE(sniff_max_interval_fops, sniff_max_interval_get,
580 sniff_max_interval_set, "%llu\n");
581
582static int identity_show(struct seq_file *f, void *p)
583{
584 struct hci_dev *hdev = f->private;
585 bdaddr_t addr;
586 u8 addr_type;
587
588 hci_dev_lock(hdev);
589
590 hci_copy_identity_address(hdev, &addr, &addr_type);
591
592 seq_printf(f, "%pMR (type %u) %*phN %pMR\n", &addr, addr_type,
593 16, hdev->irk, &hdev->rpa);
594
595 hci_dev_unlock(hdev);
596
597 return 0;
598}
599
600static int identity_open(struct inode *inode, struct file *file)
601{
602 return single_open(file, identity_show, inode->i_private);
603}
604
605static const struct file_operations identity_fops = {
606 .open = identity_open,
607 .read = seq_read,
608 .llseek = seq_lseek,
609 .release = single_release,
610};
611
612static int random_address_show(struct seq_file *f, void *p)
613{
614 struct hci_dev *hdev = f->private;
615
616 hci_dev_lock(hdev);
617 seq_printf(f, "%pMR\n", &hdev->random_addr);
618 hci_dev_unlock(hdev);
619
620 return 0;
621}
622
623static int random_address_open(struct inode *inode, struct file *file)
624{
625 return single_open(file, random_address_show, inode->i_private);
626}
627
628static const struct file_operations random_address_fops = {
629 .open = random_address_open,
630 .read = seq_read,
631 .llseek = seq_lseek,
632 .release = single_release,
633};
634
635static int static_address_show(struct seq_file *f, void *p)
636{
637 struct hci_dev *hdev = f->private;
638
639 hci_dev_lock(hdev);
640 seq_printf(f, "%pMR\n", &hdev->static_addr);
641 hci_dev_unlock(hdev);
642
643 return 0;
644}
645
646static int static_address_open(struct inode *inode, struct file *file)
647{
648 return single_open(file, static_address_show, inode->i_private);
649}
650
651static const struct file_operations static_address_fops = {
652 .open = static_address_open,
653 .read = seq_read,
654 .llseek = seq_lseek,
655 .release = single_release,
656};
657
658static ssize_t force_static_address_read(struct file *file,
659 char __user *user_buf,
660 size_t count, loff_t *ppos)
661{
662 struct hci_dev *hdev = file->private_data;
663 char buf[3];
664
665 buf[0] = test_bit(HCI_FORCE_STATIC_ADDR, &hdev->dev_flags) ? 'Y': 'N';
666 buf[1] = '\n';
667 buf[2] = '\0';
668 return simple_read_from_buffer(user_buf, count, ppos, buf, 2);
669}
670
671static ssize_t force_static_address_write(struct file *file,
672 const char __user *user_buf,
673 size_t count, loff_t *ppos)
674{
675 struct hci_dev *hdev = file->private_data;
676 char buf[32];
677 size_t buf_size = min(count, (sizeof(buf)-1));
678 bool enable;
679
680 if (test_bit(HCI_UP, &hdev->flags))
681 return -EBUSY;
682
683 if (copy_from_user(buf, user_buf, buf_size))
684 return -EFAULT;
685
686 buf[buf_size] = '\0';
687 if (strtobool(buf, &enable))
688 return -EINVAL;
689
690 if (enable == test_bit(HCI_FORCE_STATIC_ADDR, &hdev->dev_flags))
691 return -EALREADY;
692
693 change_bit(HCI_FORCE_STATIC_ADDR, &hdev->dev_flags);
694
695 return count;
696}
697
698static const struct file_operations force_static_address_fops = {
699 .open = simple_open,
700 .read = force_static_address_read,
701 .write = force_static_address_write,
702 .llseek = default_llseek,
703};
704
705static int white_list_show(struct seq_file *f, void *ptr)
706{
707 struct hci_dev *hdev = f->private;
708 struct bdaddr_list *b;
709
710 hci_dev_lock(hdev);
711 list_for_each_entry(b, &hdev->le_white_list, list)
712 seq_printf(f, "%pMR (type %u)\n", &b->bdaddr, b->bdaddr_type);
713 hci_dev_unlock(hdev);
714
715 return 0;
716}
717
718static int white_list_open(struct inode *inode, struct file *file)
719{
720 return single_open(file, white_list_show, inode->i_private);
721}
722
723static const struct file_operations white_list_fops = {
724 .open = white_list_open,
725 .read = seq_read,
726 .llseek = seq_lseek,
727 .release = single_release,
728};
729
730static int identity_resolving_keys_show(struct seq_file *f, void *ptr)
731{
732 struct hci_dev *hdev = f->private;
733 struct list_head *p, *n;
734
735 hci_dev_lock(hdev);
736 list_for_each_safe(p, n, &hdev->identity_resolving_keys) {
737 struct smp_irk *irk = list_entry(p, struct smp_irk, list);
738 seq_printf(f, "%pMR (type %u) %*phN %pMR\n",
739 &irk->bdaddr, irk->addr_type,
740 16, irk->val, &irk->rpa);
741 }
742 hci_dev_unlock(hdev);
743
744 return 0;
745}
746
747static int identity_resolving_keys_open(struct inode *inode, struct file *file)
748{
749 return single_open(file, identity_resolving_keys_show,
750 inode->i_private);
751}
752
753static const struct file_operations identity_resolving_keys_fops = {
754 .open = identity_resolving_keys_open,
755 .read = seq_read,
756 .llseek = seq_lseek,
757 .release = single_release,
758};
759
760static int long_term_keys_show(struct seq_file *f, void *ptr)
761{
762 struct hci_dev *hdev = f->private;
763 struct list_head *p, *n;
764
765 hci_dev_lock(hdev);
766 list_for_each_safe(p, n, &hdev->long_term_keys) {
767 struct smp_ltk *ltk = list_entry(p, struct smp_ltk, list);
768 seq_printf(f, "%pMR (type %u) %u 0x%02x %u %.4x %.16llx %*phN\n",
769 <k->bdaddr, ltk->bdaddr_type, ltk->authenticated,
770 ltk->type, ltk->enc_size, __le16_to_cpu(ltk->ediv),
771 __le64_to_cpu(ltk->rand), 16, ltk->val);
772 }
773 hci_dev_unlock(hdev);
774
775 return 0;
776}
777
778static int long_term_keys_open(struct inode *inode, struct file *file)
779{
780 return single_open(file, long_term_keys_show, inode->i_private);
781}
782
783static const struct file_operations long_term_keys_fops = {
784 .open = long_term_keys_open,
785 .read = seq_read,
786 .llseek = seq_lseek,
787 .release = single_release,
788};
789
790static int conn_min_interval_set(void *data, u64 val)
791{
792 struct hci_dev *hdev = data;
793
794 if (val < 0x0006 || val > 0x0c80 || val > hdev->le_conn_max_interval)
795 return -EINVAL;
796
797 hci_dev_lock(hdev);
798 hdev->le_conn_min_interval = val;
799 hci_dev_unlock(hdev);
800
801 return 0;
802}
803
804static int conn_min_interval_get(void *data, u64 *val)
805{
806 struct hci_dev *hdev = data;
807
808 hci_dev_lock(hdev);
809 *val = hdev->le_conn_min_interval;
810 hci_dev_unlock(hdev);
811
812 return 0;
813}
814
815DEFINE_SIMPLE_ATTRIBUTE(conn_min_interval_fops, conn_min_interval_get,
816 conn_min_interval_set, "%llu\n");
817
818static int conn_max_interval_set(void *data, u64 val)
819{
820 struct hci_dev *hdev = data;
821
822 if (val < 0x0006 || val > 0x0c80 || val < hdev->le_conn_min_interval)
823 return -EINVAL;
824
825 hci_dev_lock(hdev);
826 hdev->le_conn_max_interval = val;
827 hci_dev_unlock(hdev);
828
829 return 0;
830}
831
832static int conn_max_interval_get(void *data, u64 *val)
833{
834 struct hci_dev *hdev = data;
835
836 hci_dev_lock(hdev);
837 *val = hdev->le_conn_max_interval;
838 hci_dev_unlock(hdev);
839
840 return 0;
841}
842
843DEFINE_SIMPLE_ATTRIBUTE(conn_max_interval_fops, conn_max_interval_get,
844 conn_max_interval_set, "%llu\n");
845
846static int adv_channel_map_set(void *data, u64 val)
847{
848 struct hci_dev *hdev = data;
849
850 if (val < 0x01 || val > 0x07)
851 return -EINVAL;
852
853 hci_dev_lock(hdev);
854 hdev->le_adv_channel_map = val;
855 hci_dev_unlock(hdev);
856
857 return 0;
858}
859
860static int adv_channel_map_get(void *data, u64 *val)
861{
862 struct hci_dev *hdev = data;
863
864 hci_dev_lock(hdev);
865 *val = hdev->le_adv_channel_map;
866 hci_dev_unlock(hdev);
867
868 return 0;
869}
870
871DEFINE_SIMPLE_ATTRIBUTE(adv_channel_map_fops, adv_channel_map_get,
872 adv_channel_map_set, "%llu\n");
873
874static ssize_t lowpan_read(struct file *file, char __user *user_buf,
875 size_t count, loff_t *ppos)
876{
877 struct hci_dev *hdev = file->private_data;
878 char buf[3];
879
880 buf[0] = test_bit(HCI_6LOWPAN_ENABLED, &hdev->dev_flags) ? 'Y' : 'N';
881 buf[1] = '\n';
882 buf[2] = '\0';
883 return simple_read_from_buffer(user_buf, count, ppos, buf, 2);
884}
885
886static ssize_t lowpan_write(struct file *fp, const char __user *user_buffer,
887 size_t count, loff_t *position)
888{
889 struct hci_dev *hdev = fp->private_data;
890 bool enable;
891 char buf[32];
892 size_t buf_size = min(count, (sizeof(buf)-1));
893
894 if (copy_from_user(buf, user_buffer, buf_size))
895 return -EFAULT;
896
897 buf[buf_size] = '\0';
898
899 if (strtobool(buf, &enable) < 0)
900 return -EINVAL;
901
902 if (enable == test_bit(HCI_6LOWPAN_ENABLED, &hdev->dev_flags))
903 return -EALREADY;
904
905 change_bit(HCI_6LOWPAN_ENABLED, &hdev->dev_flags);
906
907 return count;
908}
909
910static const struct file_operations lowpan_debugfs_fops = {
911 .open = simple_open,
912 .read = lowpan_read,
913 .write = lowpan_write,
914 .llseek = default_llseek,
915};
916
917static int le_auto_conn_show(struct seq_file *sf, void *ptr)
918{
919 struct hci_dev *hdev = sf->private;
920 struct hci_conn_params *p;
921
922 hci_dev_lock(hdev);
923
924 list_for_each_entry(p, &hdev->le_conn_params, list) {
925 seq_printf(sf, "%pMR %u %u\n", &p->addr, p->addr_type,
926 p->auto_connect);
927 }
928
929 hci_dev_unlock(hdev);
930
931 return 0;
932}
933
934static int le_auto_conn_open(struct inode *inode, struct file *file)
935{
936 return single_open(file, le_auto_conn_show, inode->i_private);
937}
938
939static ssize_t le_auto_conn_write(struct file *file, const char __user *data,
940 size_t count, loff_t *offset)
941{
942 struct seq_file *sf = file->private_data;
943 struct hci_dev *hdev = sf->private;
944 u8 auto_connect = 0;
945 bdaddr_t addr;
946 u8 addr_type;
947 char *buf;
948 int err = 0;
949 int n;
950
951 /* Don't allow partial write */
952 if (*offset != 0)
953 return -EINVAL;
954
955 if (count < 3)
956 return -EINVAL;
957
958 buf = kzalloc(count, GFP_KERNEL);
959 if (!buf)
960 return -ENOMEM;
961
962 if (copy_from_user(buf, data, count)) {
963 err = -EFAULT;
964 goto done;
965 }
966
967 if (memcmp(buf, "add", 3) == 0) {
968 n = sscanf(&buf[4], "%hhx:%hhx:%hhx:%hhx:%hhx:%hhx %hhu %hhu",
969 &addr.b[5], &addr.b[4], &addr.b[3], &addr.b[2],
970 &addr.b[1], &addr.b[0], &addr_type,
971 &auto_connect);
972
973 if (n < 7) {
974 err = -EINVAL;
975 goto done;
976 }
977
978 hci_dev_lock(hdev);
979 err = hci_conn_params_add(hdev, &addr, addr_type, auto_connect,
980 hdev->le_conn_min_interval,
981 hdev->le_conn_max_interval);
982 hci_dev_unlock(hdev);
983
984 if (err)
985 goto done;
986 } else if (memcmp(buf, "del", 3) == 0) {
987 n = sscanf(&buf[4], "%hhx:%hhx:%hhx:%hhx:%hhx:%hhx %hhu",
988 &addr.b[5], &addr.b[4], &addr.b[3], &addr.b[2],
989 &addr.b[1], &addr.b[0], &addr_type);
990
991 if (n < 7) {
992 err = -EINVAL;
993 goto done;
994 }
995
996 hci_dev_lock(hdev);
997 hci_conn_params_del(hdev, &addr, addr_type);
998 hci_dev_unlock(hdev);
999 } else if (memcmp(buf, "clr", 3) == 0) {
1000 hci_dev_lock(hdev);
1001 hci_conn_params_clear(hdev);
1002 hci_pend_le_conns_clear(hdev);
1003 hci_update_background_scan(hdev);
1004 hci_dev_unlock(hdev);
1005 } else {
1006 err = -EINVAL;
1007 }
1008
1009done:
1010 kfree(buf);
1011
1012 if (err)
1013 return err;
1014 else
1015 return count;
1016}
1017
1018static const struct file_operations le_auto_conn_fops = {
1019 .open = le_auto_conn_open,
1020 .read = seq_read,
1021 .write = le_auto_conn_write,
1022 .llseek = seq_lseek,
1023 .release = single_release,
1024};
1025
1026/* ---- HCI requests ---- */
1027
1028static void hci_req_sync_complete(struct hci_dev *hdev, u8 result)
1029{
1030 BT_DBG("%s result 0x%2.2x", hdev->name, result);
1031
1032 if (hdev->req_status == HCI_REQ_PEND) {
1033 hdev->req_result = result;
1034 hdev->req_status = HCI_REQ_DONE;
1035 wake_up_interruptible(&hdev->req_wait_q);
1036 }
1037}
1038
1039static void hci_req_cancel(struct hci_dev *hdev, int err)
1040{
1041 BT_DBG("%s err 0x%2.2x", hdev->name, err);
1042
1043 if (hdev->req_status == HCI_REQ_PEND) {
1044 hdev->req_result = err;
1045 hdev->req_status = HCI_REQ_CANCELED;
1046 wake_up_interruptible(&hdev->req_wait_q);
1047 }
1048}
1049
1050static struct sk_buff *hci_get_cmd_complete(struct hci_dev *hdev, u16 opcode,
1051 u8 event)
1052{
1053 struct hci_ev_cmd_complete *ev;
1054 struct hci_event_hdr *hdr;
1055 struct sk_buff *skb;
1056
1057 hci_dev_lock(hdev);
1058
1059 skb = hdev->recv_evt;
1060 hdev->recv_evt = NULL;
1061
1062 hci_dev_unlock(hdev);
1063
1064 if (!skb)
1065 return ERR_PTR(-ENODATA);
1066
1067 if (skb->len < sizeof(*hdr)) {
1068 BT_ERR("Too short HCI event");
1069 goto failed;
1070 }
1071
1072 hdr = (void *) skb->data;
1073 skb_pull(skb, HCI_EVENT_HDR_SIZE);
1074
1075 if (event) {
1076 if (hdr->evt != event)
1077 goto failed;
1078 return skb;
1079 }
1080
1081 if (hdr->evt != HCI_EV_CMD_COMPLETE) {
1082 BT_DBG("Last event is not cmd complete (0x%2.2x)", hdr->evt);
1083 goto failed;
1084 }
1085
1086 if (skb->len < sizeof(*ev)) {
1087 BT_ERR("Too short cmd_complete event");
1088 goto failed;
1089 }
1090
1091 ev = (void *) skb->data;
1092 skb_pull(skb, sizeof(*ev));
1093
1094 if (opcode == __le16_to_cpu(ev->opcode))
1095 return skb;
1096
1097 BT_DBG("opcode doesn't match (0x%2.2x != 0x%2.2x)", opcode,
1098 __le16_to_cpu(ev->opcode));
1099
1100failed:
1101 kfree_skb(skb);
1102 return ERR_PTR(-ENODATA);
1103}
1104
1105struct sk_buff *__hci_cmd_sync_ev(struct hci_dev *hdev, u16 opcode, u32 plen,
1106 const void *param, u8 event, u32 timeout)
1107{
1108 DECLARE_WAITQUEUE(wait, current);
1109 struct hci_request req;
1110 int err = 0;
1111
1112 BT_DBG("%s", hdev->name);
1113
1114 hci_req_init(&req, hdev);
1115
1116 hci_req_add_ev(&req, opcode, plen, param, event);
1117
1118 hdev->req_status = HCI_REQ_PEND;
1119
1120 err = hci_req_run(&req, hci_req_sync_complete);
1121 if (err < 0)
1122 return ERR_PTR(err);
1123
1124 add_wait_queue(&hdev->req_wait_q, &wait);
1125 set_current_state(TASK_INTERRUPTIBLE);
1126
1127 schedule_timeout(timeout);
1128
1129 remove_wait_queue(&hdev->req_wait_q, &wait);
1130
1131 if (signal_pending(current))
1132 return ERR_PTR(-EINTR);
1133
1134 switch (hdev->req_status) {
1135 case HCI_REQ_DONE:
1136 err = -bt_to_errno(hdev->req_result);
1137 break;
1138
1139 case HCI_REQ_CANCELED:
1140 err = -hdev->req_result;
1141 break;
1142
1143 default:
1144 err = -ETIMEDOUT;
1145 break;
1146 }
1147
1148 hdev->req_status = hdev->req_result = 0;
1149
1150 BT_DBG("%s end: err %d", hdev->name, err);
1151
1152 if (err < 0)
1153 return ERR_PTR(err);
1154
1155 return hci_get_cmd_complete(hdev, opcode, event);
1156}
1157EXPORT_SYMBOL(__hci_cmd_sync_ev);
1158
1159struct sk_buff *__hci_cmd_sync(struct hci_dev *hdev, u16 opcode, u32 plen,
1160 const void *param, u32 timeout)
1161{
1162 return __hci_cmd_sync_ev(hdev, opcode, plen, param, 0, timeout);
1163}
1164EXPORT_SYMBOL(__hci_cmd_sync);
1165
1166/* Execute request and wait for completion. */
1167static int __hci_req_sync(struct hci_dev *hdev,
1168 void (*func)(struct hci_request *req,
1169 unsigned long opt),
1170 unsigned long opt, __u32 timeout)
1171{
1172 struct hci_request req;
1173 DECLARE_WAITQUEUE(wait, current);
1174 int err = 0;
1175
1176 BT_DBG("%s start", hdev->name);
1177
1178 hci_req_init(&req, hdev);
1179
1180 hdev->req_status = HCI_REQ_PEND;
1181
1182 func(&req, opt);
1183
1184 err = hci_req_run(&req, hci_req_sync_complete);
1185 if (err < 0) {
1186 hdev->req_status = 0;
1187
1188 /* ENODATA means the HCI request command queue is empty.
1189 * This can happen when a request with conditionals doesn't
1190 * trigger any commands to be sent. This is normal behavior
1191 * and should not trigger an error return.
1192 */
1193 if (err == -ENODATA)
1194 return 0;
1195
1196 return err;
1197 }
1198
1199 add_wait_queue(&hdev->req_wait_q, &wait);
1200 set_current_state(TASK_INTERRUPTIBLE);
1201
1202 schedule_timeout(timeout);
1203
1204 remove_wait_queue(&hdev->req_wait_q, &wait);
1205
1206 if (signal_pending(current))
1207 return -EINTR;
1208
1209 switch (hdev->req_status) {
1210 case HCI_REQ_DONE:
1211 err = -bt_to_errno(hdev->req_result);
1212 break;
1213
1214 case HCI_REQ_CANCELED:
1215 err = -hdev->req_result;
1216 break;
1217
1218 default:
1219 err = -ETIMEDOUT;
1220 break;
1221 }
1222
1223 hdev->req_status = hdev->req_result = 0;
1224
1225 BT_DBG("%s end: err %d", hdev->name, err);
1226
1227 return err;
1228}
1229
1230static int hci_req_sync(struct hci_dev *hdev,
1231 void (*req)(struct hci_request *req,
1232 unsigned long opt),
1233 unsigned long opt, __u32 timeout)
1234{
1235 int ret;
1236
1237 if (!test_bit(HCI_UP, &hdev->flags))
1238 return -ENETDOWN;
1239
1240 /* Serialize all requests */
1241 hci_req_lock(hdev);
1242 ret = __hci_req_sync(hdev, req, opt, timeout);
1243 hci_req_unlock(hdev);
1244
1245 return ret;
1246}
1247
1248static void hci_reset_req(struct hci_request *req, unsigned long opt)
1249{
1250 BT_DBG("%s %ld", req->hdev->name, opt);
1251
1252 /* Reset device */
1253 set_bit(HCI_RESET, &req->hdev->flags);
1254 hci_req_add(req, HCI_OP_RESET, 0, NULL);
1255}
1256
1257static void bredr_init(struct hci_request *req)
1258{
1259 req->hdev->flow_ctl_mode = HCI_FLOW_CTL_MODE_PACKET_BASED;
1260
1261 /* Read Local Supported Features */
1262 hci_req_add(req, HCI_OP_READ_LOCAL_FEATURES, 0, NULL);
1263
1264 /* Read Local Version */
1265 hci_req_add(req, HCI_OP_READ_LOCAL_VERSION, 0, NULL);
1266
1267 /* Read BD Address */
1268 hci_req_add(req, HCI_OP_READ_BD_ADDR, 0, NULL);
1269}
1270
1271static void amp_init(struct hci_request *req)
1272{
1273 req->hdev->flow_ctl_mode = HCI_FLOW_CTL_MODE_BLOCK_BASED;
1274
1275 /* Read Local Version */
1276 hci_req_add(req, HCI_OP_READ_LOCAL_VERSION, 0, NULL);
1277
1278 /* Read Local Supported Commands */
1279 hci_req_add(req, HCI_OP_READ_LOCAL_COMMANDS, 0, NULL);
1280
1281 /* Read Local Supported Features */
1282 hci_req_add(req, HCI_OP_READ_LOCAL_FEATURES, 0, NULL);
1283
1284 /* Read Local AMP Info */
1285 hci_req_add(req, HCI_OP_READ_LOCAL_AMP_INFO, 0, NULL);
1286
1287 /* Read Data Blk size */
1288 hci_req_add(req, HCI_OP_READ_DATA_BLOCK_SIZE, 0, NULL);
1289
1290 /* Read Flow Control Mode */
1291 hci_req_add(req, HCI_OP_READ_FLOW_CONTROL_MODE, 0, NULL);
1292
1293 /* Read Location Data */
1294 hci_req_add(req, HCI_OP_READ_LOCATION_DATA, 0, NULL);
1295}
1296
1297static void hci_init1_req(struct hci_request *req, unsigned long opt)
1298{
1299 struct hci_dev *hdev = req->hdev;
1300
1301 BT_DBG("%s %ld", hdev->name, opt);
1302
1303 /* Reset */
1304 if (!test_bit(HCI_QUIRK_RESET_ON_CLOSE, &hdev->quirks))
1305 hci_reset_req(req, 0);
1306
1307 switch (hdev->dev_type) {
1308 case HCI_BREDR:
1309 bredr_init(req);
1310 break;
1311
1312 case HCI_AMP:
1313 amp_init(req);
1314 break;
1315
1316 default:
1317 BT_ERR("Unknown device type %d", hdev->dev_type);
1318 break;
1319 }
1320}
1321
1322static void bredr_setup(struct hci_request *req)
1323{
1324 struct hci_dev *hdev = req->hdev;
1325
1326 __le16 param;
1327 __u8 flt_type;
1328
1329 /* Read Buffer Size (ACL mtu, max pkt, etc.) */
1330 hci_req_add(req, HCI_OP_READ_BUFFER_SIZE, 0, NULL);
1331
1332 /* Read Class of Device */
1333 hci_req_add(req, HCI_OP_READ_CLASS_OF_DEV, 0, NULL);
1334
1335 /* Read Local Name */
1336 hci_req_add(req, HCI_OP_READ_LOCAL_NAME, 0, NULL);
1337
1338 /* Read Voice Setting */
1339 hci_req_add(req, HCI_OP_READ_VOICE_SETTING, 0, NULL);
1340
1341 /* Read Number of Supported IAC */
1342 hci_req_add(req, HCI_OP_READ_NUM_SUPPORTED_IAC, 0, NULL);
1343
1344 /* Read Current IAC LAP */
1345 hci_req_add(req, HCI_OP_READ_CURRENT_IAC_LAP, 0, NULL);
1346
1347 /* Clear Event Filters */
1348 flt_type = HCI_FLT_CLEAR_ALL;
1349 hci_req_add(req, HCI_OP_SET_EVENT_FLT, 1, &flt_type);
1350
1351 /* Connection accept timeout ~20 secs */
1352 param = cpu_to_le16(0x7d00);
1353 hci_req_add(req, HCI_OP_WRITE_CA_TIMEOUT, 2, ¶m);
1354
1355 /* AVM Berlin (31), aka "BlueFRITZ!", reports version 1.2,
1356 * but it does not support page scan related HCI commands.
1357 */
1358 if (hdev->manufacturer != 31 && hdev->hci_ver > BLUETOOTH_VER_1_1) {
1359 hci_req_add(req, HCI_OP_READ_PAGE_SCAN_ACTIVITY, 0, NULL);
1360 hci_req_add(req, HCI_OP_READ_PAGE_SCAN_TYPE, 0, NULL);
1361 }
1362}
1363
1364static void le_setup(struct hci_request *req)
1365{
1366 struct hci_dev *hdev = req->hdev;
1367
1368 /* Read LE Buffer Size */
1369 hci_req_add(req, HCI_OP_LE_READ_BUFFER_SIZE, 0, NULL);
1370
1371 /* Read LE Local Supported Features */
1372 hci_req_add(req, HCI_OP_LE_READ_LOCAL_FEATURES, 0, NULL);
1373
1374 /* Read LE Supported States */
1375 hci_req_add(req, HCI_OP_LE_READ_SUPPORTED_STATES, 0, NULL);
1376
1377 /* Read LE Advertising Channel TX Power */
1378 hci_req_add(req, HCI_OP_LE_READ_ADV_TX_POWER, 0, NULL);
1379
1380 /* Read LE White List Size */
1381 hci_req_add(req, HCI_OP_LE_READ_WHITE_LIST_SIZE, 0, NULL);
1382
1383 /* Clear LE White List */
1384 hci_req_add(req, HCI_OP_LE_CLEAR_WHITE_LIST, 0, NULL);
1385
1386 /* LE-only controllers have LE implicitly enabled */
1387 if (!lmp_bredr_capable(hdev))
1388 set_bit(HCI_LE_ENABLED, &hdev->dev_flags);
1389}
1390
1391static u8 hci_get_inquiry_mode(struct hci_dev *hdev)
1392{
1393 if (lmp_ext_inq_capable(hdev))
1394 return 0x02;
1395
1396 if (lmp_inq_rssi_capable(hdev))
1397 return 0x01;
1398
1399 if (hdev->manufacturer == 11 && hdev->hci_rev == 0x00 &&
1400 hdev->lmp_subver == 0x0757)
1401 return 0x01;
1402
1403 if (hdev->manufacturer == 15) {
1404 if (hdev->hci_rev == 0x03 && hdev->lmp_subver == 0x6963)
1405 return 0x01;
1406 if (hdev->hci_rev == 0x09 && hdev->lmp_subver == 0x6963)
1407 return 0x01;
1408 if (hdev->hci_rev == 0x00 && hdev->lmp_subver == 0x6965)
1409 return 0x01;
1410 }
1411
1412 if (hdev->manufacturer == 31 && hdev->hci_rev == 0x2005 &&
1413 hdev->lmp_subver == 0x1805)
1414 return 0x01;
1415
1416 return 0x00;
1417}
1418
1419static void hci_setup_inquiry_mode(struct hci_request *req)
1420{
1421 u8 mode;
1422
1423 mode = hci_get_inquiry_mode(req->hdev);
1424
1425 hci_req_add(req, HCI_OP_WRITE_INQUIRY_MODE, 1, &mode);
1426}
1427
1428static void hci_setup_event_mask(struct hci_request *req)
1429{
1430 struct hci_dev *hdev = req->hdev;
1431
1432 /* The second byte is 0xff instead of 0x9f (two reserved bits
1433 * disabled) since a Broadcom 1.2 dongle doesn't respond to the
1434 * command otherwise.
1435 */
1436 u8 events[8] = { 0xff, 0xff, 0xfb, 0xff, 0x00, 0x00, 0x00, 0x00 };
1437
1438 /* CSR 1.1 dongles does not accept any bitfield so don't try to set
1439 * any event mask for pre 1.2 devices.
1440 */
1441 if (hdev->hci_ver < BLUETOOTH_VER_1_2)
1442 return;
1443
1444 if (lmp_bredr_capable(hdev)) {
1445 events[4] |= 0x01; /* Flow Specification Complete */
1446 events[4] |= 0x02; /* Inquiry Result with RSSI */
1447 events[4] |= 0x04; /* Read Remote Extended Features Complete */
1448 events[5] |= 0x08; /* Synchronous Connection Complete */
1449 events[5] |= 0x10; /* Synchronous Connection Changed */
1450 } else {
1451 /* Use a different default for LE-only devices */
1452 memset(events, 0, sizeof(events));
1453 events[0] |= 0x10; /* Disconnection Complete */
1454 events[0] |= 0x80; /* Encryption Change */
1455 events[1] |= 0x08; /* Read Remote Version Information Complete */
1456 events[1] |= 0x20; /* Command Complete */
1457 events[1] |= 0x40; /* Command Status */
1458 events[1] |= 0x80; /* Hardware Error */
1459 events[2] |= 0x04; /* Number of Completed Packets */
1460 events[3] |= 0x02; /* Data Buffer Overflow */
1461 events[5] |= 0x80; /* Encryption Key Refresh Complete */
1462 }
1463
1464 if (lmp_inq_rssi_capable(hdev))
1465 events[4] |= 0x02; /* Inquiry Result with RSSI */
1466
1467 if (lmp_sniffsubr_capable(hdev))
1468 events[5] |= 0x20; /* Sniff Subrating */
1469
1470 if (lmp_pause_enc_capable(hdev))
1471 events[5] |= 0x80; /* Encryption Key Refresh Complete */
1472
1473 if (lmp_ext_inq_capable(hdev))
1474 events[5] |= 0x40; /* Extended Inquiry Result */
1475
1476 if (lmp_no_flush_capable(hdev))
1477 events[7] |= 0x01; /* Enhanced Flush Complete */
1478
1479 if (lmp_lsto_capable(hdev))
1480 events[6] |= 0x80; /* Link Supervision Timeout Changed */
1481
1482 if (lmp_ssp_capable(hdev)) {
1483 events[6] |= 0x01; /* IO Capability Request */
1484 events[6] |= 0x02; /* IO Capability Response */
1485 events[6] |= 0x04; /* User Confirmation Request */
1486 events[6] |= 0x08; /* User Passkey Request */
1487 events[6] |= 0x10; /* Remote OOB Data Request */
1488 events[6] |= 0x20; /* Simple Pairing Complete */
1489 events[7] |= 0x04; /* User Passkey Notification */
1490 events[7] |= 0x08; /* Keypress Notification */
1491 events[7] |= 0x10; /* Remote Host Supported
1492 * Features Notification
1493 */
1494 }
1495
1496 if (lmp_le_capable(hdev))
1497 events[7] |= 0x20; /* LE Meta-Event */
1498
1499 hci_req_add(req, HCI_OP_SET_EVENT_MASK, sizeof(events), events);
1500
1501 if (lmp_le_capable(hdev)) {
1502 memset(events, 0, sizeof(events));
1503 events[0] = 0x1f;
1504 hci_req_add(req, HCI_OP_LE_SET_EVENT_MASK,
1505 sizeof(events), events);
1506 }
1507}
1508
1509static void hci_init2_req(struct hci_request *req, unsigned long opt)
1510{
1511 struct hci_dev *hdev = req->hdev;
1512
1513 if (lmp_bredr_capable(hdev))
1514 bredr_setup(req);
1515 else
1516 clear_bit(HCI_BREDR_ENABLED, &hdev->dev_flags);
1517
1518 if (lmp_le_capable(hdev))
1519 le_setup(req);
1520
1521 hci_setup_event_mask(req);
1522
1523 /* AVM Berlin (31), aka "BlueFRITZ!", doesn't support the read
1524 * local supported commands HCI command.
1525 */
1526 if (hdev->manufacturer != 31 && hdev->hci_ver > BLUETOOTH_VER_1_1)
1527 hci_req_add(req, HCI_OP_READ_LOCAL_COMMANDS, 0, NULL);
1528
1529 if (lmp_ssp_capable(hdev)) {
1530 /* When SSP is available, then the host features page
1531 * should also be available as well. However some
1532 * controllers list the max_page as 0 as long as SSP
1533 * has not been enabled. To achieve proper debugging
1534 * output, force the minimum max_page to 1 at least.
1535 */
1536 hdev->max_page = 0x01;
1537
1538 if (test_bit(HCI_SSP_ENABLED, &hdev->dev_flags)) {
1539 u8 mode = 0x01;
1540 hci_req_add(req, HCI_OP_WRITE_SSP_MODE,
1541 sizeof(mode), &mode);
1542 } else {
1543 struct hci_cp_write_eir cp;
1544
1545 memset(hdev->eir, 0, sizeof(hdev->eir));
1546 memset(&cp, 0, sizeof(cp));
1547
1548 hci_req_add(req, HCI_OP_WRITE_EIR, sizeof(cp), &cp);
1549 }
1550 }
1551
1552 if (lmp_inq_rssi_capable(hdev))
1553 hci_setup_inquiry_mode(req);
1554
1555 if (lmp_inq_tx_pwr_capable(hdev))
1556 hci_req_add(req, HCI_OP_READ_INQ_RSP_TX_POWER, 0, NULL);
1557
1558 if (lmp_ext_feat_capable(hdev)) {
1559 struct hci_cp_read_local_ext_features cp;
1560
1561 cp.page = 0x01;
1562 hci_req_add(req, HCI_OP_READ_LOCAL_EXT_FEATURES,
1563 sizeof(cp), &cp);
1564 }
1565
1566 if (test_bit(HCI_LINK_SECURITY, &hdev->dev_flags)) {
1567 u8 enable = 1;
1568 hci_req_add(req, HCI_OP_WRITE_AUTH_ENABLE, sizeof(enable),
1569 &enable);
1570 }
1571}
1572
1573static void hci_setup_link_policy(struct hci_request *req)
1574{
1575 struct hci_dev *hdev = req->hdev;
1576 struct hci_cp_write_def_link_policy cp;
1577 u16 link_policy = 0;
1578
1579 if (lmp_rswitch_capable(hdev))
1580 link_policy |= HCI_LP_RSWITCH;
1581 if (lmp_hold_capable(hdev))
1582 link_policy |= HCI_LP_HOLD;
1583 if (lmp_sniff_capable(hdev))
1584 link_policy |= HCI_LP_SNIFF;
1585 if (lmp_park_capable(hdev))
1586 link_policy |= HCI_LP_PARK;
1587
1588 cp.policy = cpu_to_le16(link_policy);
1589 hci_req_add(req, HCI_OP_WRITE_DEF_LINK_POLICY, sizeof(cp), &cp);
1590}
1591
1592static void hci_set_le_support(struct hci_request *req)
1593{
1594 struct hci_dev *hdev = req->hdev;
1595 struct hci_cp_write_le_host_supported cp;
1596
1597 /* LE-only devices do not support explicit enablement */
1598 if (!lmp_bredr_capable(hdev))
1599 return;
1600
1601 memset(&cp, 0, sizeof(cp));
1602
1603 if (test_bit(HCI_LE_ENABLED, &hdev->dev_flags)) {
1604 cp.le = 0x01;
1605 cp.simul = lmp_le_br_capable(hdev);
1606 }
1607
1608 if (cp.le != lmp_host_le_capable(hdev))
1609 hci_req_add(req, HCI_OP_WRITE_LE_HOST_SUPPORTED, sizeof(cp),
1610 &cp);
1611}
1612
1613static void hci_set_event_mask_page_2(struct hci_request *req)
1614{
1615 struct hci_dev *hdev = req->hdev;
1616 u8 events[8] = { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 };
1617
1618 /* If Connectionless Slave Broadcast master role is supported
1619 * enable all necessary events for it.
1620 */
1621 if (lmp_csb_master_capable(hdev)) {
1622 events[1] |= 0x40; /* Triggered Clock Capture */
1623 events[1] |= 0x80; /* Synchronization Train Complete */
1624 events[2] |= 0x10; /* Slave Page Response Timeout */
1625 events[2] |= 0x20; /* CSB Channel Map Change */
1626 }
1627
1628 /* If Connectionless Slave Broadcast slave role is supported
1629 * enable all necessary events for it.
1630 */
1631 if (lmp_csb_slave_capable(hdev)) {
1632 events[2] |= 0x01; /* Synchronization Train Received */
1633 events[2] |= 0x02; /* CSB Receive */
1634 events[2] |= 0x04; /* CSB Timeout */
1635 events[2] |= 0x08; /* Truncated Page Complete */
1636 }
1637
1638 /* Enable Authenticated Payload Timeout Expired event if supported */
1639 if (lmp_ping_capable(hdev))
1640 events[2] |= 0x80;
1641
1642 hci_req_add(req, HCI_OP_SET_EVENT_MASK_PAGE_2, sizeof(events), events);
1643}
1644
1645static void hci_init3_req(struct hci_request *req, unsigned long opt)
1646{
1647 struct hci_dev *hdev = req->hdev;
1648 u8 p;
1649
1650 /* Some Broadcom based Bluetooth controllers do not support the
1651 * Delete Stored Link Key command. They are clearly indicating its
1652 * absence in the bit mask of supported commands.
1653 *
1654 * Check the supported commands and only if the the command is marked
1655 * as supported send it. If not supported assume that the controller
1656 * does not have actual support for stored link keys which makes this
1657 * command redundant anyway.
1658 *
1659 * Some controllers indicate that they support handling deleting
1660 * stored link keys, but they don't. The quirk lets a driver
1661 * just disable this command.
1662 */
1663 if (hdev->commands[6] & 0x80 &&
1664 !test_bit(HCI_QUIRK_BROKEN_STORED_LINK_KEY, &hdev->quirks)) {
1665 struct hci_cp_delete_stored_link_key cp;
1666
1667 bacpy(&cp.bdaddr, BDADDR_ANY);
1668 cp.delete_all = 0x01;
1669 hci_req_add(req, HCI_OP_DELETE_STORED_LINK_KEY,
1670 sizeof(cp), &cp);
1671 }
1672
1673 if (hdev->commands[5] & 0x10)
1674 hci_setup_link_policy(req);
1675
1676 if (lmp_le_capable(hdev))
1677 hci_set_le_support(req);
1678
1679 /* Read features beyond page 1 if available */
1680 for (p = 2; p < HCI_MAX_PAGES && p <= hdev->max_page; p++) {
1681 struct hci_cp_read_local_ext_features cp;
1682
1683 cp.page = p;
1684 hci_req_add(req, HCI_OP_READ_LOCAL_EXT_FEATURES,
1685 sizeof(cp), &cp);
1686 }
1687}
1688
1689static void hci_init4_req(struct hci_request *req, unsigned long opt)
1690{
1691 struct hci_dev *hdev = req->hdev;
1692
1693 /* Set event mask page 2 if the HCI command for it is supported */
1694 if (hdev->commands[22] & 0x04)
1695 hci_set_event_mask_page_2(req);
1696
1697 /* Check for Synchronization Train support */
1698 if (lmp_sync_train_capable(hdev))
1699 hci_req_add(req, HCI_OP_READ_SYNC_TRAIN_PARAMS, 0, NULL);
1700
1701 /* Enable Secure Connections if supported and configured */
1702 if ((lmp_sc_capable(hdev) ||
1703 test_bit(HCI_FORCE_SC, &hdev->dev_flags)) &&
1704 test_bit(HCI_SC_ENABLED, &hdev->dev_flags)) {
1705 u8 support = 0x01;
1706 hci_req_add(req, HCI_OP_WRITE_SC_SUPPORT,
1707 sizeof(support), &support);
1708 }
1709}
1710
1711static int __hci_init(struct hci_dev *hdev)
1712{
1713 int err;
1714
1715 err = __hci_req_sync(hdev, hci_init1_req, 0, HCI_INIT_TIMEOUT);
1716 if (err < 0)
1717 return err;
1718
1719 /* The Device Under Test (DUT) mode is special and available for
1720 * all controller types. So just create it early on.
1721 */
1722 if (test_bit(HCI_SETUP, &hdev->dev_flags)) {
1723 debugfs_create_file("dut_mode", 0644, hdev->debugfs, hdev,
1724 &dut_mode_fops);
1725 }
1726
1727 /* HCI_BREDR covers both single-mode LE, BR/EDR and dual-mode
1728 * BR/EDR/LE type controllers. AMP controllers only need the
1729 * first stage init.
1730 */
1731 if (hdev->dev_type != HCI_BREDR)
1732 return 0;
1733
1734 err = __hci_req_sync(hdev, hci_init2_req, 0, HCI_INIT_TIMEOUT);
1735 if (err < 0)
1736 return err;
1737
1738 err = __hci_req_sync(hdev, hci_init3_req, 0, HCI_INIT_TIMEOUT);
1739 if (err < 0)
1740 return err;
1741
1742 err = __hci_req_sync(hdev, hci_init4_req, 0, HCI_INIT_TIMEOUT);
1743 if (err < 0)
1744 return err;
1745
1746 /* Only create debugfs entries during the initial setup
1747 * phase and not every time the controller gets powered on.
1748 */
1749 if (!test_bit(HCI_SETUP, &hdev->dev_flags))
1750 return 0;
1751
1752 debugfs_create_file("features", 0444, hdev->debugfs, hdev,
1753 &features_fops);
1754 debugfs_create_u16("manufacturer", 0444, hdev->debugfs,
1755 &hdev->manufacturer);
1756 debugfs_create_u8("hci_version", 0444, hdev->debugfs, &hdev->hci_ver);
1757 debugfs_create_u16("hci_revision", 0444, hdev->debugfs, &hdev->hci_rev);
1758 debugfs_create_file("blacklist", 0444, hdev->debugfs, hdev,
1759 &blacklist_fops);
1760 debugfs_create_file("uuids", 0444, hdev->debugfs, hdev, &uuids_fops);
1761
1762 if (lmp_bredr_capable(hdev)) {
1763 debugfs_create_file("inquiry_cache", 0444, hdev->debugfs,
1764 hdev, &inquiry_cache_fops);
1765 debugfs_create_file("link_keys", 0400, hdev->debugfs,
1766 hdev, &link_keys_fops);
1767 debugfs_create_file("dev_class", 0444, hdev->debugfs,
1768 hdev, &dev_class_fops);
1769 debugfs_create_file("voice_setting", 0444, hdev->debugfs,
1770 hdev, &voice_setting_fops);
1771 }
1772
1773 if (lmp_ssp_capable(hdev)) {
1774 debugfs_create_file("auto_accept_delay", 0644, hdev->debugfs,
1775 hdev, &auto_accept_delay_fops);
1776 debugfs_create_file("ssp_debug_mode", 0644, hdev->debugfs,
1777 hdev, &ssp_debug_mode_fops);
1778 debugfs_create_file("force_sc_support", 0644, hdev->debugfs,
1779 hdev, &force_sc_support_fops);
1780 debugfs_create_file("sc_only_mode", 0444, hdev->debugfs,
1781 hdev, &sc_only_mode_fops);
1782 }
1783
1784 if (lmp_sniff_capable(hdev)) {
1785 debugfs_create_file("idle_timeout", 0644, hdev->debugfs,
1786 hdev, &idle_timeout_fops);
1787 debugfs_create_file("sniff_min_interval", 0644, hdev->debugfs,
1788 hdev, &sniff_min_interval_fops);
1789 debugfs_create_file("sniff_max_interval", 0644, hdev->debugfs,
1790 hdev, &sniff_max_interval_fops);
1791 }
1792
1793 if (lmp_le_capable(hdev)) {
1794 debugfs_create_file("identity", 0400, hdev->debugfs,
1795 hdev, &identity_fops);
1796 debugfs_create_file("rpa_timeout", 0644, hdev->debugfs,
1797 hdev, &rpa_timeout_fops);
1798 debugfs_create_file("random_address", 0444, hdev->debugfs,
1799 hdev, &random_address_fops);
1800 debugfs_create_file("static_address", 0444, hdev->debugfs,
1801 hdev, &static_address_fops);
1802
1803 /* For controllers with a public address, provide a debug
1804 * option to force the usage of the configured static
1805 * address. By default the public address is used.
1806 */
1807 if (bacmp(&hdev->bdaddr, BDADDR_ANY))
1808 debugfs_create_file("force_static_address", 0644,
1809 hdev->debugfs, hdev,
1810 &force_static_address_fops);
1811
1812 debugfs_create_u8("white_list_size", 0444, hdev->debugfs,
1813 &hdev->le_white_list_size);
1814 debugfs_create_file("white_list", 0444, hdev->debugfs, hdev,
1815 &white_list_fops);
1816 debugfs_create_file("identity_resolving_keys", 0400,
1817 hdev->debugfs, hdev,
1818 &identity_resolving_keys_fops);
1819 debugfs_create_file("long_term_keys", 0400, hdev->debugfs,
1820 hdev, &long_term_keys_fops);
1821 debugfs_create_file("conn_min_interval", 0644, hdev->debugfs,
1822 hdev, &conn_min_interval_fops);
1823 debugfs_create_file("conn_max_interval", 0644, hdev->debugfs,
1824 hdev, &conn_max_interval_fops);
1825 debugfs_create_file("adv_channel_map", 0644, hdev->debugfs,
1826 hdev, &adv_channel_map_fops);
1827 debugfs_create_file("6lowpan", 0644, hdev->debugfs, hdev,
1828 &lowpan_debugfs_fops);
1829 debugfs_create_file("le_auto_conn", 0644, hdev->debugfs, hdev,
1830 &le_auto_conn_fops);
1831 }
1832
1833 return 0;
1834}
1835
1836static void hci_scan_req(struct hci_request *req, unsigned long opt)
1837{
1838 __u8 scan = opt;
1839
1840 BT_DBG("%s %x", req->hdev->name, scan);
1841
1842 /* Inquiry and Page scans */
1843 hci_req_add(req, HCI_OP_WRITE_SCAN_ENABLE, 1, &scan);
1844}
1845
1846static void hci_auth_req(struct hci_request *req, unsigned long opt)
1847{
1848 __u8 auth = opt;
1849
1850 BT_DBG("%s %x", req->hdev->name, auth);
1851
1852 /* Authentication */
1853 hci_req_add(req, HCI_OP_WRITE_AUTH_ENABLE, 1, &auth);
1854}
1855
1856static void hci_encrypt_req(struct hci_request *req, unsigned long opt)
1857{
1858 __u8 encrypt = opt;
1859
1860 BT_DBG("%s %x", req->hdev->name, encrypt);
1861
1862 /* Encryption */
1863 hci_req_add(req, HCI_OP_WRITE_ENCRYPT_MODE, 1, &encrypt);
1864}
1865
1866static void hci_linkpol_req(struct hci_request *req, unsigned long opt)
1867{
1868 __le16 policy = cpu_to_le16(opt);
1869
1870 BT_DBG("%s %x", req->hdev->name, policy);
1871
1872 /* Default link policy */
1873 hci_req_add(req, HCI_OP_WRITE_DEF_LINK_POLICY, 2, &policy);
1874}
1875
1876/* Get HCI device by index.
1877 * Device is held on return. */
1878struct hci_dev *hci_dev_get(int index)
1879{
1880 struct hci_dev *hdev = NULL, *d;
1881
1882 BT_DBG("%d", index);
1883
1884 if (index < 0)
1885 return NULL;
1886
1887 read_lock(&hci_dev_list_lock);
1888 list_for_each_entry(d, &hci_dev_list, list) {
1889 if (d->id == index) {
1890 hdev = hci_dev_hold(d);
1891 break;
1892 }
1893 }
1894 read_unlock(&hci_dev_list_lock);
1895 return hdev;
1896}
1897
1898/* ---- Inquiry support ---- */
1899
1900bool hci_discovery_active(struct hci_dev *hdev)
1901{
1902 struct discovery_state *discov = &hdev->discovery;
1903
1904 switch (discov->state) {
1905 case DISCOVERY_FINDING:
1906 case DISCOVERY_RESOLVING:
1907 return true;
1908
1909 default:
1910 return false;
1911 }
1912}
1913
1914void hci_discovery_set_state(struct hci_dev *hdev, int state)
1915{
1916 BT_DBG("%s state %u -> %u", hdev->name, hdev->discovery.state, state);
1917
1918 if (hdev->discovery.state == state)
1919 return;
1920
1921 switch (state) {
1922 case DISCOVERY_STOPPED:
1923 hci_update_background_scan(hdev);
1924
1925 if (hdev->discovery.state != DISCOVERY_STARTING)
1926 mgmt_discovering(hdev, 0);
1927 break;
1928 case DISCOVERY_STARTING:
1929 break;
1930 case DISCOVERY_FINDING:
1931 mgmt_discovering(hdev, 1);
1932 break;
1933 case DISCOVERY_RESOLVING:
1934 break;
1935 case DISCOVERY_STOPPING:
1936 break;
1937 }
1938
1939 hdev->discovery.state = state;
1940}
1941
1942void hci_inquiry_cache_flush(struct hci_dev *hdev)
1943{
1944 struct discovery_state *cache = &hdev->discovery;
1945 struct inquiry_entry *p, *n;
1946
1947 list_for_each_entry_safe(p, n, &cache->all, all) {
1948 list_del(&p->all);
1949 kfree(p);
1950 }
1951
1952 INIT_LIST_HEAD(&cache->unknown);
1953 INIT_LIST_HEAD(&cache->resolve);
1954}
1955
1956struct inquiry_entry *hci_inquiry_cache_lookup(struct hci_dev *hdev,
1957 bdaddr_t *bdaddr)
1958{
1959 struct discovery_state *cache = &hdev->discovery;
1960 struct inquiry_entry *e;
1961
1962 BT_DBG("cache %p, %pMR", cache, bdaddr);
1963
1964 list_for_each_entry(e, &cache->all, all) {
1965 if (!bacmp(&e->data.bdaddr, bdaddr))
1966 return e;
1967 }
1968
1969 return NULL;
1970}
1971
1972struct inquiry_entry *hci_inquiry_cache_lookup_unknown(struct hci_dev *hdev,
1973 bdaddr_t *bdaddr)
1974{
1975 struct discovery_state *cache = &hdev->discovery;
1976 struct inquiry_entry *e;
1977
1978 BT_DBG("cache %p, %pMR", cache, bdaddr);
1979
1980 list_for_each_entry(e, &cache->unknown, list) {
1981 if (!bacmp(&e->data.bdaddr, bdaddr))
1982 return e;
1983 }
1984
1985 return NULL;
1986}
1987
1988struct inquiry_entry *hci_inquiry_cache_lookup_resolve(struct hci_dev *hdev,
1989 bdaddr_t *bdaddr,
1990 int state)
1991{
1992 struct discovery_state *cache = &hdev->discovery;
1993 struct inquiry_entry *e;
1994
1995 BT_DBG("cache %p bdaddr %pMR state %d", cache, bdaddr, state);
1996
1997 list_for_each_entry(e, &cache->resolve, list) {
1998 if (!bacmp(bdaddr, BDADDR_ANY) && e->name_state == state)
1999 return e;
2000 if (!bacmp(&e->data.bdaddr, bdaddr))
2001 return e;
2002 }
2003
2004 return NULL;
2005}
2006
2007void hci_inquiry_cache_update_resolve(struct hci_dev *hdev,
2008 struct inquiry_entry *ie)
2009{
2010 struct discovery_state *cache = &hdev->discovery;
2011 struct list_head *pos = &cache->resolve;
2012 struct inquiry_entry *p;
2013
2014 list_del(&ie->list);
2015
2016 list_for_each_entry(p, &cache->resolve, list) {
2017 if (p->name_state != NAME_PENDING &&
2018 abs(p->data.rssi) >= abs(ie->data.rssi))
2019 break;
2020 pos = &p->list;
2021 }
2022
2023 list_add(&ie->list, pos);
2024}
2025
2026bool hci_inquiry_cache_update(struct hci_dev *hdev, struct inquiry_data *data,
2027 bool name_known, bool *ssp)
2028{
2029 struct discovery_state *cache = &hdev->discovery;
2030 struct inquiry_entry *ie;
2031
2032 BT_DBG("cache %p, %pMR", cache, &data->bdaddr);
2033
2034 hci_remove_remote_oob_data(hdev, &data->bdaddr);
2035
2036 if (ssp)
2037 *ssp = data->ssp_mode;
2038
2039 ie = hci_inquiry_cache_lookup(hdev, &data->bdaddr);
2040 if (ie) {
2041 if (ie->data.ssp_mode && ssp)
2042 *ssp = true;
2043
2044 if (ie->name_state == NAME_NEEDED &&
2045 data->rssi != ie->data.rssi) {
2046 ie->data.rssi = data->rssi;
2047 hci_inquiry_cache_update_resolve(hdev, ie);
2048 }
2049
2050 goto update;
2051 }
2052
2053 /* Entry not in the cache. Add new one. */
2054 ie = kzalloc(sizeof(struct inquiry_entry), GFP_ATOMIC);
2055 if (!ie)
2056 return false;
2057
2058 list_add(&ie->all, &cache->all);
2059
2060 if (name_known) {
2061 ie->name_state = NAME_KNOWN;
2062 } else {
2063 ie->name_state = NAME_NOT_KNOWN;
2064 list_add(&ie->list, &cache->unknown);
2065 }
2066
2067update:
2068 if (name_known && ie->name_state != NAME_KNOWN &&
2069 ie->name_state != NAME_PENDING) {
2070 ie->name_state = NAME_KNOWN;
2071 list_del(&ie->list);
2072 }
2073
2074 memcpy(&ie->data, data, sizeof(*data));
2075 ie->timestamp = jiffies;
2076 cache->timestamp = jiffies;
2077
2078 if (ie->name_state == NAME_NOT_KNOWN)
2079 return false;
2080
2081 return true;
2082}
2083
2084static int inquiry_cache_dump(struct hci_dev *hdev, int num, __u8 *buf)
2085{
2086 struct discovery_state *cache = &hdev->discovery;
2087 struct inquiry_info *info = (struct inquiry_info *) buf;
2088 struct inquiry_entry *e;
2089 int copied = 0;
2090
2091 list_for_each_entry(e, &cache->all, all) {
2092 struct inquiry_data *data = &e->data;
2093
2094 if (copied >= num)
2095 break;
2096
2097 bacpy(&info->bdaddr, &data->bdaddr);
2098 info->pscan_rep_mode = data->pscan_rep_mode;
2099 info->pscan_period_mode = data->pscan_period_mode;
2100 info->pscan_mode = data->pscan_mode;
2101 memcpy(info->dev_class, data->dev_class, 3);
2102 info->clock_offset = data->clock_offset;
2103
2104 info++;
2105 copied++;
2106 }
2107
2108 BT_DBG("cache %p, copied %d", cache, copied);
2109 return copied;
2110}
2111
2112static void hci_inq_req(struct hci_request *req, unsigned long opt)
2113{
2114 struct hci_inquiry_req *ir = (struct hci_inquiry_req *) opt;
2115 struct hci_dev *hdev = req->hdev;
2116 struct hci_cp_inquiry cp;
2117
2118 BT_DBG("%s", hdev->name);
2119
2120 if (test_bit(HCI_INQUIRY, &hdev->flags))
2121 return;
2122
2123 /* Start Inquiry */
2124 memcpy(&cp.lap, &ir->lap, 3);
2125 cp.length = ir->length;
2126 cp.num_rsp = ir->num_rsp;
2127 hci_req_add(req, HCI_OP_INQUIRY, sizeof(cp), &cp);
2128}
2129
2130static int wait_inquiry(void *word)
2131{
2132 schedule();
2133 return signal_pending(current);
2134}
2135
2136int hci_inquiry(void __user *arg)
2137{
2138 __u8 __user *ptr = arg;
2139 struct hci_inquiry_req ir;
2140 struct hci_dev *hdev;
2141 int err = 0, do_inquiry = 0, max_rsp;
2142 long timeo;
2143 __u8 *buf;
2144
2145 if (copy_from_user(&ir, ptr, sizeof(ir)))
2146 return -EFAULT;
2147
2148 hdev = hci_dev_get(ir.dev_id);
2149 if (!hdev)
2150 return -ENODEV;
2151
2152 if (test_bit(HCI_USER_CHANNEL, &hdev->dev_flags)) {
2153 err = -EBUSY;
2154 goto done;
2155 }
2156
2157 if (hdev->dev_type != HCI_BREDR) {
2158 err = -EOPNOTSUPP;
2159 goto done;
2160 }
2161
2162 if (!test_bit(HCI_BREDR_ENABLED, &hdev->dev_flags)) {
2163 err = -EOPNOTSUPP;
2164 goto done;
2165 }
2166
2167 hci_dev_lock(hdev);
2168 if (inquiry_cache_age(hdev) > INQUIRY_CACHE_AGE_MAX ||
2169 inquiry_cache_empty(hdev) || ir.flags & IREQ_CACHE_FLUSH) {
2170 hci_inquiry_cache_flush(hdev);
2171 do_inquiry = 1;
2172 }
2173 hci_dev_unlock(hdev);
2174
2175 timeo = ir.length * msecs_to_jiffies(2000);
2176
2177 if (do_inquiry) {
2178 err = hci_req_sync(hdev, hci_inq_req, (unsigned long) &ir,
2179 timeo);
2180 if (err < 0)
2181 goto done;
2182
2183 /* Wait until Inquiry procedure finishes (HCI_INQUIRY flag is
2184 * cleared). If it is interrupted by a signal, return -EINTR.
2185 */
2186 if (wait_on_bit(&hdev->flags, HCI_INQUIRY, wait_inquiry,
2187 TASK_INTERRUPTIBLE))
2188 return -EINTR;
2189 }
2190
2191 /* for unlimited number of responses we will use buffer with
2192 * 255 entries
2193 */
2194 max_rsp = (ir.num_rsp == 0) ? 255 : ir.num_rsp;
2195
2196 /* cache_dump can't sleep. Therefore we allocate temp buffer and then
2197 * copy it to the user space.
2198 */
2199 buf = kmalloc(sizeof(struct inquiry_info) * max_rsp, GFP_KERNEL);
2200 if (!buf) {
2201 err = -ENOMEM;
2202 goto done;
2203 }
2204
2205 hci_dev_lock(hdev);
2206 ir.num_rsp = inquiry_cache_dump(hdev, max_rsp, buf);
2207 hci_dev_unlock(hdev);
2208
2209 BT_DBG("num_rsp %d", ir.num_rsp);
2210
2211 if (!copy_to_user(ptr, &ir, sizeof(ir))) {
2212 ptr += sizeof(ir);
2213 if (copy_to_user(ptr, buf, sizeof(struct inquiry_info) *
2214 ir.num_rsp))
2215 err = -EFAULT;
2216 } else
2217 err = -EFAULT;
2218
2219 kfree(buf);
2220
2221done:
2222 hci_dev_put(hdev);
2223 return err;
2224}
2225
2226static int hci_dev_do_open(struct hci_dev *hdev)
2227{
2228 int ret = 0;
2229
2230 BT_DBG("%s %p", hdev->name, hdev);
2231
2232 hci_req_lock(hdev);
2233
2234 if (test_bit(HCI_UNREGISTER, &hdev->dev_flags)) {
2235 ret = -ENODEV;
2236 goto done;
2237 }
2238
2239 if (!test_bit(HCI_SETUP, &hdev->dev_flags)) {
2240 /* Check for rfkill but allow the HCI setup stage to
2241 * proceed (which in itself doesn't cause any RF activity).
2242 */
2243 if (test_bit(HCI_RFKILLED, &hdev->dev_flags)) {
2244 ret = -ERFKILL;
2245 goto done;
2246 }
2247
2248 /* Check for valid public address or a configured static
2249 * random adddress, but let the HCI setup proceed to
2250 * be able to determine if there is a public address
2251 * or not.
2252 *
2253 * In case of user channel usage, it is not important
2254 * if a public address or static random address is
2255 * available.
2256 *
2257 * This check is only valid for BR/EDR controllers
2258 * since AMP controllers do not have an address.
2259 */
2260 if (!test_bit(HCI_USER_CHANNEL, &hdev->dev_flags) &&
2261 hdev->dev_type == HCI_BREDR &&
2262 !bacmp(&hdev->bdaddr, BDADDR_ANY) &&
2263 !bacmp(&hdev->static_addr, BDADDR_ANY)) {
2264 ret = -EADDRNOTAVAIL;
2265 goto done;
2266 }
2267 }
2268
2269 if (test_bit(HCI_UP, &hdev->flags)) {
2270 ret = -EALREADY;
2271 goto done;
2272 }
2273
2274 if (hdev->open(hdev)) {
2275 ret = -EIO;
2276 goto done;
2277 }
2278
2279 atomic_set(&hdev->cmd_cnt, 1);
2280 set_bit(HCI_INIT, &hdev->flags);
2281
2282 if (hdev->setup && test_bit(HCI_SETUP, &hdev->dev_flags))
2283 ret = hdev->setup(hdev);
2284
2285 if (!ret) {
2286 if (test_bit(HCI_QUIRK_RAW_DEVICE, &hdev->quirks))
2287 set_bit(HCI_RAW, &hdev->flags);
2288
2289 if (!test_bit(HCI_RAW, &hdev->flags) &&
2290 !test_bit(HCI_USER_CHANNEL, &hdev->dev_flags))
2291 ret = __hci_init(hdev);
2292 }
2293
2294 clear_bit(HCI_INIT, &hdev->flags);
2295
2296 if (!ret) {
2297 hci_dev_hold(hdev);
2298 set_bit(HCI_RPA_EXPIRED, &hdev->dev_flags);
2299 set_bit(HCI_UP, &hdev->flags);
2300 hci_notify(hdev, HCI_DEV_UP);
2301 if (!test_bit(HCI_SETUP, &hdev->dev_flags) &&
2302 !test_bit(HCI_USER_CHANNEL, &hdev->dev_flags) &&
2303 hdev->dev_type == HCI_BREDR) {
2304 hci_dev_lock(hdev);
2305 mgmt_powered(hdev, 1);
2306 hci_dev_unlock(hdev);
2307 }
2308 } else {
2309 /* Init failed, cleanup */
2310 flush_work(&hdev->tx_work);
2311 flush_work(&hdev->cmd_work);
2312 flush_work(&hdev->rx_work);
2313
2314 skb_queue_purge(&hdev->cmd_q);
2315 skb_queue_purge(&hdev->rx_q);
2316
2317 if (hdev->flush)
2318 hdev->flush(hdev);
2319
2320 if (hdev->sent_cmd) {
2321 kfree_skb(hdev->sent_cmd);
2322 hdev->sent_cmd = NULL;
2323 }
2324
2325 hdev->close(hdev);
2326 hdev->flags = 0;
2327 }
2328
2329done:
2330 hci_req_unlock(hdev);
2331 return ret;
2332}
2333
2334/* ---- HCI ioctl helpers ---- */
2335
2336int hci_dev_open(__u16 dev)
2337{
2338 struct hci_dev *hdev;
2339 int err;
2340
2341 hdev = hci_dev_get(dev);
2342 if (!hdev)
2343 return -ENODEV;
2344
2345 /* We need to ensure that no other power on/off work is pending
2346 * before proceeding to call hci_dev_do_open. This is
2347 * particularly important if the setup procedure has not yet
2348 * completed.
2349 */
2350 if (test_and_clear_bit(HCI_AUTO_OFF, &hdev->dev_flags))
2351 cancel_delayed_work(&hdev->power_off);
2352
2353 /* After this call it is guaranteed that the setup procedure
2354 * has finished. This means that error conditions like RFKILL
2355 * or no valid public or static random address apply.
2356 */
2357 flush_workqueue(hdev->req_workqueue);
2358
2359 err = hci_dev_do_open(hdev);
2360
2361 hci_dev_put(hdev);
2362
2363 return err;
2364}
2365
2366static int hci_dev_do_close(struct hci_dev *hdev)
2367{
2368 BT_DBG("%s %p", hdev->name, hdev);
2369
2370 cancel_delayed_work(&hdev->power_off);
2371
2372 hci_req_cancel(hdev, ENODEV);
2373 hci_req_lock(hdev);
2374
2375 if (!test_and_clear_bit(HCI_UP, &hdev->flags)) {
2376 del_timer_sync(&hdev->cmd_timer);
2377 hci_req_unlock(hdev);
2378 return 0;
2379 }
2380
2381 /* Flush RX and TX works */
2382 flush_work(&hdev->tx_work);
2383 flush_work(&hdev->rx_work);
2384
2385 if (hdev->discov_timeout > 0) {
2386 cancel_delayed_work(&hdev->discov_off);
2387 hdev->discov_timeout = 0;
2388 clear_bit(HCI_DISCOVERABLE, &hdev->dev_flags);
2389 clear_bit(HCI_LIMITED_DISCOVERABLE, &hdev->dev_flags);
2390 }
2391
2392 if (test_and_clear_bit(HCI_SERVICE_CACHE, &hdev->dev_flags))
2393 cancel_delayed_work(&hdev->service_cache);
2394
2395 cancel_delayed_work_sync(&hdev->le_scan_disable);
2396
2397 if (test_bit(HCI_MGMT, &hdev->dev_flags))
2398 cancel_delayed_work_sync(&hdev->rpa_expired);
2399
2400 hci_dev_lock(hdev);
2401 hci_inquiry_cache_flush(hdev);
2402 hci_conn_hash_flush(hdev);
2403 hci_pend_le_conns_clear(hdev);
2404 hci_dev_unlock(hdev);
2405
2406 hci_notify(hdev, HCI_DEV_DOWN);
2407
2408 if (hdev->flush)
2409 hdev->flush(hdev);
2410
2411 /* Reset device */
2412 skb_queue_purge(&hdev->cmd_q);
2413 atomic_set(&hdev->cmd_cnt, 1);
2414 if (!test_bit(HCI_RAW, &hdev->flags) &&
2415 !test_bit(HCI_AUTO_OFF, &hdev->dev_flags) &&
2416 test_bit(HCI_QUIRK_RESET_ON_CLOSE, &hdev->quirks)) {
2417 set_bit(HCI_INIT, &hdev->flags);
2418 __hci_req_sync(hdev, hci_reset_req, 0, HCI_CMD_TIMEOUT);
2419 clear_bit(HCI_INIT, &hdev->flags);
2420 }
2421
2422 /* flush cmd work */
2423 flush_work(&hdev->cmd_work);
2424
2425 /* Drop queues */
2426 skb_queue_purge(&hdev->rx_q);
2427 skb_queue_purge(&hdev->cmd_q);
2428 skb_queue_purge(&hdev->raw_q);
2429
2430 /* Drop last sent command */
2431 if (hdev->sent_cmd) {
2432 del_timer_sync(&hdev->cmd_timer);
2433 kfree_skb(hdev->sent_cmd);
2434 hdev->sent_cmd = NULL;
2435 }
2436
2437 kfree_skb(hdev->recv_evt);
2438 hdev->recv_evt = NULL;
2439
2440 /* After this point our queues are empty
2441 * and no tasks are scheduled. */
2442 hdev->close(hdev);
2443
2444 /* Clear flags */
2445 hdev->flags = 0;
2446 hdev->dev_flags &= ~HCI_PERSISTENT_MASK;
2447
2448 if (!test_and_clear_bit(HCI_AUTO_OFF, &hdev->dev_flags)) {
2449 if (hdev->dev_type == HCI_BREDR) {
2450 hci_dev_lock(hdev);
2451 mgmt_powered(hdev, 0);
2452 hci_dev_unlock(hdev);
2453 }
2454 }
2455
2456 /* Controller radio is available but is currently powered down */
2457 hdev->amp_status = AMP_STATUS_POWERED_DOWN;
2458
2459 memset(hdev->eir, 0, sizeof(hdev->eir));
2460 memset(hdev->dev_class, 0, sizeof(hdev->dev_class));
2461 bacpy(&hdev->random_addr, BDADDR_ANY);
2462
2463 hci_req_unlock(hdev);
2464
2465 hci_dev_put(hdev);
2466 return 0;
2467}
2468
2469int hci_dev_close(__u16 dev)
2470{
2471 struct hci_dev *hdev;
2472 int err;
2473
2474 hdev = hci_dev_get(dev);
2475 if (!hdev)
2476 return -ENODEV;
2477
2478 if (test_bit(HCI_USER_CHANNEL, &hdev->dev_flags)) {
2479 err = -EBUSY;
2480 goto done;
2481 }
2482
2483 if (test_and_clear_bit(HCI_AUTO_OFF, &hdev->dev_flags))
2484 cancel_delayed_work(&hdev->power_off);
2485
2486 err = hci_dev_do_close(hdev);
2487
2488done:
2489 hci_dev_put(hdev);
2490 return err;
2491}
2492
2493int hci_dev_reset(__u16 dev)
2494{
2495 struct hci_dev *hdev;
2496 int ret = 0;
2497
2498 hdev = hci_dev_get(dev);
2499 if (!hdev)
2500 return -ENODEV;
2501
2502 hci_req_lock(hdev);
2503
2504 if (!test_bit(HCI_UP, &hdev->flags)) {
2505 ret = -ENETDOWN;
2506 goto done;
2507 }
2508
2509 if (test_bit(HCI_USER_CHANNEL, &hdev->dev_flags)) {
2510 ret = -EBUSY;
2511 goto done;
2512 }
2513
2514 /* Drop queues */
2515 skb_queue_purge(&hdev->rx_q);
2516 skb_queue_purge(&hdev->cmd_q);
2517
2518 hci_dev_lock(hdev);
2519 hci_inquiry_cache_flush(hdev);
2520 hci_conn_hash_flush(hdev);
2521 hci_dev_unlock(hdev);
2522
2523 if (hdev->flush)
2524 hdev->flush(hdev);
2525
2526 atomic_set(&hdev->cmd_cnt, 1);
2527 hdev->acl_cnt = 0; hdev->sco_cnt = 0; hdev->le_cnt = 0;
2528
2529 if (!test_bit(HCI_RAW, &hdev->flags))
2530 ret = __hci_req_sync(hdev, hci_reset_req, 0, HCI_INIT_TIMEOUT);
2531
2532done:
2533 hci_req_unlock(hdev);
2534 hci_dev_put(hdev);
2535 return ret;
2536}
2537
2538int hci_dev_reset_stat(__u16 dev)
2539{
2540 struct hci_dev *hdev;
2541 int ret = 0;
2542
2543 hdev = hci_dev_get(dev);
2544 if (!hdev)
2545 return -ENODEV;
2546
2547 if (test_bit(HCI_USER_CHANNEL, &hdev->dev_flags)) {
2548 ret = -EBUSY;
2549 goto done;
2550 }
2551
2552 memset(&hdev->stat, 0, sizeof(struct hci_dev_stats));
2553
2554done:
2555 hci_dev_put(hdev);
2556 return ret;
2557}
2558
2559int hci_dev_cmd(unsigned int cmd, void __user *arg)
2560{
2561 struct hci_dev *hdev;
2562 struct hci_dev_req dr;
2563 int err = 0;
2564
2565 if (copy_from_user(&dr, arg, sizeof(dr)))
2566 return -EFAULT;
2567
2568 hdev = hci_dev_get(dr.dev_id);
2569 if (!hdev)
2570 return -ENODEV;
2571
2572 if (test_bit(HCI_USER_CHANNEL, &hdev->dev_flags)) {
2573 err = -EBUSY;
2574 goto done;
2575 }
2576
2577 if (hdev->dev_type != HCI_BREDR) {
2578 err = -EOPNOTSUPP;
2579 goto done;
2580 }
2581
2582 if (!test_bit(HCI_BREDR_ENABLED, &hdev->dev_flags)) {
2583 err = -EOPNOTSUPP;
2584 goto done;
2585 }
2586
2587 switch (cmd) {
2588 case HCISETAUTH:
2589 err = hci_req_sync(hdev, hci_auth_req, dr.dev_opt,
2590 HCI_INIT_TIMEOUT);
2591 break;
2592
2593 case HCISETENCRYPT:
2594 if (!lmp_encrypt_capable(hdev)) {
2595 err = -EOPNOTSUPP;
2596 break;
2597 }
2598
2599 if (!test_bit(HCI_AUTH, &hdev->flags)) {
2600 /* Auth must be enabled first */
2601 err = hci_req_sync(hdev, hci_auth_req, dr.dev_opt,
2602 HCI_INIT_TIMEOUT);
2603 if (err)
2604 break;
2605 }
2606
2607 err = hci_req_sync(hdev, hci_encrypt_req, dr.dev_opt,
2608 HCI_INIT_TIMEOUT);
2609 break;
2610
2611 case HCISETSCAN:
2612 err = hci_req_sync(hdev, hci_scan_req, dr.dev_opt,
2613 HCI_INIT_TIMEOUT);
2614 break;
2615
2616 case HCISETLINKPOL:
2617 err = hci_req_sync(hdev, hci_linkpol_req, dr.dev_opt,
2618 HCI_INIT_TIMEOUT);
2619 break;
2620
2621 case HCISETLINKMODE:
2622 hdev->link_mode = ((__u16) dr.dev_opt) &
2623 (HCI_LM_MASTER | HCI_LM_ACCEPT);
2624 break;
2625
2626 case HCISETPTYPE:
2627 hdev->pkt_type = (__u16) dr.dev_opt;
2628 break;
2629
2630 case HCISETACLMTU:
2631 hdev->acl_mtu = *((__u16 *) &dr.dev_opt + 1);
2632 hdev->acl_pkts = *((__u16 *) &dr.dev_opt + 0);
2633 break;
2634
2635 case HCISETSCOMTU:
2636 hdev->sco_mtu = *((__u16 *) &dr.dev_opt + 1);
2637 hdev->sco_pkts = *((__u16 *) &dr.dev_opt + 0);
2638 break;
2639
2640 default:
2641 err = -EINVAL;
2642 break;
2643 }
2644
2645done:
2646 hci_dev_put(hdev);
2647 return err;
2648}
2649
2650int hci_get_dev_list(void __user *arg)
2651{
2652 struct hci_dev *hdev;
2653 struct hci_dev_list_req *dl;
2654 struct hci_dev_req *dr;
2655 int n = 0, size, err;
2656 __u16 dev_num;
2657
2658 if (get_user(dev_num, (__u16 __user *) arg))
2659 return -EFAULT;
2660
2661 if (!dev_num || dev_num > (PAGE_SIZE * 2) / sizeof(*dr))
2662 return -EINVAL;
2663
2664 size = sizeof(*dl) + dev_num * sizeof(*dr);
2665
2666 dl = kzalloc(size, GFP_KERNEL);
2667 if (!dl)
2668 return -ENOMEM;
2669
2670 dr = dl->dev_req;
2671
2672 read_lock(&hci_dev_list_lock);
2673 list_for_each_entry(hdev, &hci_dev_list, list) {
2674 if (test_and_clear_bit(HCI_AUTO_OFF, &hdev->dev_flags))
2675 cancel_delayed_work(&hdev->power_off);
2676
2677 if (!test_bit(HCI_MGMT, &hdev->dev_flags))
2678 set_bit(HCI_PAIRABLE, &hdev->dev_flags);
2679
2680 (dr + n)->dev_id = hdev->id;
2681 (dr + n)->dev_opt = hdev->flags;
2682
2683 if (++n >= dev_num)
2684 break;
2685 }
2686 read_unlock(&hci_dev_list_lock);
2687
2688 dl->dev_num = n;
2689 size = sizeof(*dl) + n * sizeof(*dr);
2690
2691 err = copy_to_user(arg, dl, size);
2692 kfree(dl);
2693
2694 return err ? -EFAULT : 0;
2695}
2696
2697int hci_get_dev_info(void __user *arg)
2698{
2699 struct hci_dev *hdev;
2700 struct hci_dev_info di;
2701 int err = 0;
2702
2703 if (copy_from_user(&di, arg, sizeof(di)))
2704 return -EFAULT;
2705
2706 hdev = hci_dev_get(di.dev_id);
2707 if (!hdev)
2708 return -ENODEV;
2709
2710 if (test_and_clear_bit(HCI_AUTO_OFF, &hdev->dev_flags))
2711 cancel_delayed_work_sync(&hdev->power_off);
2712
2713 if (!test_bit(HCI_MGMT, &hdev->dev_flags))
2714 set_bit(HCI_PAIRABLE, &hdev->dev_flags);
2715
2716 strcpy(di.name, hdev->name);
2717 di.bdaddr = hdev->bdaddr;
2718 di.type = (hdev->bus & 0x0f) | ((hdev->dev_type & 0x03) << 4);
2719 di.flags = hdev->flags;
2720 di.pkt_type = hdev->pkt_type;
2721 if (lmp_bredr_capable(hdev)) {
2722 di.acl_mtu = hdev->acl_mtu;
2723 di.acl_pkts = hdev->acl_pkts;
2724 di.sco_mtu = hdev->sco_mtu;
2725 di.sco_pkts = hdev->sco_pkts;
2726 } else {
2727 di.acl_mtu = hdev->le_mtu;
2728 di.acl_pkts = hdev->le_pkts;
2729 di.sco_mtu = 0;
2730 di.sco_pkts = 0;
2731 }
2732 di.link_policy = hdev->link_policy;
2733 di.link_mode = hdev->link_mode;
2734
2735 memcpy(&di.stat, &hdev->stat, sizeof(di.stat));
2736 memcpy(&di.features, &hdev->features, sizeof(di.features));
2737
2738 if (copy_to_user(arg, &di, sizeof(di)))
2739 err = -EFAULT;
2740
2741 hci_dev_put(hdev);
2742
2743 return err;
2744}
2745
2746/* ---- Interface to HCI drivers ---- */
2747
2748static int hci_rfkill_set_block(void *data, bool blocked)
2749{
2750 struct hci_dev *hdev = data;
2751
2752 BT_DBG("%p name %s blocked %d", hdev, hdev->name, blocked);
2753
2754 if (test_bit(HCI_USER_CHANNEL, &hdev->dev_flags))
2755 return -EBUSY;
2756
2757 if (blocked) {
2758 set_bit(HCI_RFKILLED, &hdev->dev_flags);
2759 if (!test_bit(HCI_SETUP, &hdev->dev_flags))
2760 hci_dev_do_close(hdev);
2761 } else {
2762 clear_bit(HCI_RFKILLED, &hdev->dev_flags);
2763 }
2764
2765 return 0;
2766}
2767
2768static const struct rfkill_ops hci_rfkill_ops = {
2769 .set_block = hci_rfkill_set_block,
2770};
2771
2772static void hci_power_on(struct work_struct *work)
2773{
2774 struct hci_dev *hdev = container_of(work, struct hci_dev, power_on);
2775 int err;
2776
2777 BT_DBG("%s", hdev->name);
2778
2779 err = hci_dev_do_open(hdev);
2780 if (err < 0) {
2781 mgmt_set_powered_failed(hdev, err);
2782 return;
2783 }
2784
2785 /* During the HCI setup phase, a few error conditions are
2786 * ignored and they need to be checked now. If they are still
2787 * valid, it is important to turn the device back off.
2788 */
2789 if (test_bit(HCI_RFKILLED, &hdev->dev_flags) ||
2790 (hdev->dev_type == HCI_BREDR &&
2791 !bacmp(&hdev->bdaddr, BDADDR_ANY) &&
2792 !bacmp(&hdev->static_addr, BDADDR_ANY))) {
2793 clear_bit(HCI_AUTO_OFF, &hdev->dev_flags);
2794 hci_dev_do_close(hdev);
2795 } else if (test_bit(HCI_AUTO_OFF, &hdev->dev_flags)) {
2796 queue_delayed_work(hdev->req_workqueue, &hdev->power_off,
2797 HCI_AUTO_OFF_TIMEOUT);
2798 }
2799
2800 if (test_and_clear_bit(HCI_SETUP, &hdev->dev_flags))
2801 mgmt_index_added(hdev);
2802}
2803
2804static void hci_power_off(struct work_struct *work)
2805{
2806 struct hci_dev *hdev = container_of(work, struct hci_dev,
2807 power_off.work);
2808
2809 BT_DBG("%s", hdev->name);
2810
2811 hci_dev_do_close(hdev);
2812}
2813
2814static void hci_discov_off(struct work_struct *work)
2815{
2816 struct hci_dev *hdev;
2817
2818 hdev = container_of(work, struct hci_dev, discov_off.work);
2819
2820 BT_DBG("%s", hdev->name);
2821
2822 mgmt_discoverable_timeout(hdev);
2823}
2824
2825void hci_uuids_clear(struct hci_dev *hdev)
2826{
2827 struct bt_uuid *uuid, *tmp;
2828
2829 list_for_each_entry_safe(uuid, tmp, &hdev->uuids, list) {
2830 list_del(&uuid->list);
2831 kfree(uuid);
2832 }
2833}
2834
2835void hci_link_keys_clear(struct hci_dev *hdev)
2836{
2837 struct list_head *p, *n;
2838
2839 list_for_each_safe(p, n, &hdev->link_keys) {
2840 struct link_key *key;
2841
2842 key = list_entry(p, struct link_key, list);
2843
2844 list_del(p);
2845 kfree(key);
2846 }
2847}
2848
2849void hci_smp_ltks_clear(struct hci_dev *hdev)
2850{
2851 struct smp_ltk *k, *tmp;
2852
2853 list_for_each_entry_safe(k, tmp, &hdev->long_term_keys, list) {
2854 list_del(&k->list);
2855 kfree(k);
2856 }
2857}
2858
2859void hci_smp_irks_clear(struct hci_dev *hdev)
2860{
2861 struct smp_irk *k, *tmp;
2862
2863 list_for_each_entry_safe(k, tmp, &hdev->identity_resolving_keys, list) {
2864 list_del(&k->list);
2865 kfree(k);
2866 }
2867}
2868
2869struct link_key *hci_find_link_key(struct hci_dev *hdev, bdaddr_t *bdaddr)
2870{
2871 struct link_key *k;
2872
2873 list_for_each_entry(k, &hdev->link_keys, list)
2874 if (bacmp(bdaddr, &k->bdaddr) == 0)
2875 return k;
2876
2877 return NULL;
2878}
2879
2880static bool hci_persistent_key(struct hci_dev *hdev, struct hci_conn *conn,
2881 u8 key_type, u8 old_key_type)
2882{
2883 /* Legacy key */
2884 if (key_type < 0x03)
2885 return true;
2886
2887 /* Debug keys are insecure so don't store them persistently */
2888 if (key_type == HCI_LK_DEBUG_COMBINATION)
2889 return false;
2890
2891 /* Changed combination key and there's no previous one */
2892 if (key_type == HCI_LK_CHANGED_COMBINATION && old_key_type == 0xff)
2893 return false;
2894
2895 /* Security mode 3 case */
2896 if (!conn)
2897 return true;
2898
2899 /* Neither local nor remote side had no-bonding as requirement */
2900 if (conn->auth_type > 0x01 && conn->remote_auth > 0x01)
2901 return true;
2902
2903 /* Local side had dedicated bonding as requirement */
2904 if (conn->auth_type == 0x02 || conn->auth_type == 0x03)
2905 return true;
2906
2907 /* Remote side had dedicated bonding as requirement */
2908 if (conn->remote_auth == 0x02 || conn->remote_auth == 0x03)
2909 return true;
2910
2911 /* If none of the above criteria match, then don't store the key
2912 * persistently */
2913 return false;
2914}
2915
2916static bool ltk_type_master(u8 type)
2917{
2918 if (type == HCI_SMP_STK || type == HCI_SMP_LTK)
2919 return true;
2920
2921 return false;
2922}
2923
2924struct smp_ltk *hci_find_ltk(struct hci_dev *hdev, __le16 ediv, __le64 rand,
2925 bool master)
2926{
2927 struct smp_ltk *k;
2928
2929 list_for_each_entry(k, &hdev->long_term_keys, list) {
2930 if (k->ediv != ediv || k->rand != rand)
2931 continue;
2932
2933 if (ltk_type_master(k->type) != master)
2934 continue;
2935
2936 return k;
2937 }
2938
2939 return NULL;
2940}
2941
2942struct smp_ltk *hci_find_ltk_by_addr(struct hci_dev *hdev, bdaddr_t *bdaddr,
2943 u8 addr_type, bool master)
2944{
2945 struct smp_ltk *k;
2946
2947 list_for_each_entry(k, &hdev->long_term_keys, list)
2948 if (addr_type == k->bdaddr_type &&
2949 bacmp(bdaddr, &k->bdaddr) == 0 &&
2950 ltk_type_master(k->type) == master)
2951 return k;
2952
2953 return NULL;
2954}
2955
2956struct smp_irk *hci_find_irk_by_rpa(struct hci_dev *hdev, bdaddr_t *rpa)
2957{
2958 struct smp_irk *irk;
2959
2960 list_for_each_entry(irk, &hdev->identity_resolving_keys, list) {
2961 if (!bacmp(&irk->rpa, rpa))
2962 return irk;
2963 }
2964
2965 list_for_each_entry(irk, &hdev->identity_resolving_keys, list) {
2966 if (smp_irk_matches(hdev->tfm_aes, irk->val, rpa)) {
2967 bacpy(&irk->rpa, rpa);
2968 return irk;
2969 }
2970 }
2971
2972 return NULL;
2973}
2974
2975struct smp_irk *hci_find_irk_by_addr(struct hci_dev *hdev, bdaddr_t *bdaddr,
2976 u8 addr_type)
2977{
2978 struct smp_irk *irk;
2979
2980 /* Identity Address must be public or static random */
2981 if (addr_type == ADDR_LE_DEV_RANDOM && (bdaddr->b[5] & 0xc0) != 0xc0)
2982 return NULL;
2983
2984 list_for_each_entry(irk, &hdev->identity_resolving_keys, list) {
2985 if (addr_type == irk->addr_type &&
2986 bacmp(bdaddr, &irk->bdaddr) == 0)
2987 return irk;
2988 }
2989
2990 return NULL;
2991}
2992
2993int hci_add_link_key(struct hci_dev *hdev, struct hci_conn *conn, int new_key,
2994 bdaddr_t *bdaddr, u8 *val, u8 type, u8 pin_len)
2995{
2996 struct link_key *key, *old_key;
2997 u8 old_key_type;
2998 bool persistent;
2999
3000 old_key = hci_find_link_key(hdev, bdaddr);
3001 if (old_key) {
3002 old_key_type = old_key->type;
3003 key = old_key;
3004 } else {
3005 old_key_type = conn ? conn->key_type : 0xff;
3006 key = kzalloc(sizeof(*key), GFP_KERNEL);
3007 if (!key)
3008 return -ENOMEM;
3009 list_add(&key->list, &hdev->link_keys);
3010 }
3011
3012 BT_DBG("%s key for %pMR type %u", hdev->name, bdaddr, type);
3013
3014 /* Some buggy controller combinations generate a changed
3015 * combination key for legacy pairing even when there's no
3016 * previous key */
3017 if (type == HCI_LK_CHANGED_COMBINATION &&
3018 (!conn || conn->remote_auth == 0xff) && old_key_type == 0xff) {
3019 type = HCI_LK_COMBINATION;
3020 if (conn)
3021 conn->key_type = type;
3022 }
3023
3024 bacpy(&key->bdaddr, bdaddr);
3025 memcpy(key->val, val, HCI_LINK_KEY_SIZE);
3026 key->pin_len = pin_len;
3027
3028 if (type == HCI_LK_CHANGED_COMBINATION)
3029 key->type = old_key_type;
3030 else
3031 key->type = type;
3032
3033 if (!new_key)
3034 return 0;
3035
3036 persistent = hci_persistent_key(hdev, conn, type, old_key_type);
3037
3038 mgmt_new_link_key(hdev, key, persistent);
3039
3040 if (conn)
3041 conn->flush_key = !persistent;
3042
3043 return 0;
3044}
3045
3046struct smp_ltk *hci_add_ltk(struct hci_dev *hdev, bdaddr_t *bdaddr,
3047 u8 addr_type, u8 type, u8 authenticated,
3048 u8 tk[16], u8 enc_size, __le16 ediv, __le64 rand)
3049{
3050 struct smp_ltk *key, *old_key;
3051 bool master = ltk_type_master(type);
3052
3053 old_key = hci_find_ltk_by_addr(hdev, bdaddr, addr_type, master);
3054 if (old_key)
3055 key = old_key;
3056 else {
3057 key = kzalloc(sizeof(*key), GFP_KERNEL);
3058 if (!key)
3059 return NULL;
3060 list_add(&key->list, &hdev->long_term_keys);
3061 }
3062
3063 bacpy(&key->bdaddr, bdaddr);
3064 key->bdaddr_type = addr_type;
3065 memcpy(key->val, tk, sizeof(key->val));
3066 key->authenticated = authenticated;
3067 key->ediv = ediv;
3068 key->rand = rand;
3069 key->enc_size = enc_size;
3070 key->type = type;
3071
3072 return key;
3073}
3074
3075struct smp_irk *hci_add_irk(struct hci_dev *hdev, bdaddr_t *bdaddr,
3076 u8 addr_type, u8 val[16], bdaddr_t *rpa)
3077{
3078 struct smp_irk *irk;
3079
3080 irk = hci_find_irk_by_addr(hdev, bdaddr, addr_type);
3081 if (!irk) {
3082 irk = kzalloc(sizeof(*irk), GFP_KERNEL);
3083 if (!irk)
3084 return NULL;
3085
3086 bacpy(&irk->bdaddr, bdaddr);
3087 irk->addr_type = addr_type;
3088
3089 list_add(&irk->list, &hdev->identity_resolving_keys);
3090 }
3091
3092 memcpy(irk->val, val, 16);
3093 bacpy(&irk->rpa, rpa);
3094
3095 return irk;
3096}
3097
3098int hci_remove_link_key(struct hci_dev *hdev, bdaddr_t *bdaddr)
3099{
3100 struct link_key *key;
3101
3102 key = hci_find_link_key(hdev, bdaddr);
3103 if (!key)
3104 return -ENOENT;
3105
3106 BT_DBG("%s removing %pMR", hdev->name, bdaddr);
3107
3108 list_del(&key->list);
3109 kfree(key);
3110
3111 return 0;
3112}
3113
3114int hci_remove_ltk(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 bdaddr_type)
3115{
3116 struct smp_ltk *k, *tmp;
3117 int removed = 0;
3118
3119 list_for_each_entry_safe(k, tmp, &hdev->long_term_keys, list) {
3120 if (bacmp(bdaddr, &k->bdaddr) || k->bdaddr_type != bdaddr_type)
3121 continue;
3122
3123 BT_DBG("%s removing %pMR", hdev->name, bdaddr);
3124
3125 list_del(&k->list);
3126 kfree(k);
3127 removed++;
3128 }
3129
3130 return removed ? 0 : -ENOENT;
3131}
3132
3133void hci_remove_irk(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 addr_type)
3134{
3135 struct smp_irk *k, *tmp;
3136
3137 list_for_each_entry_safe(k, tmp, &hdev->identity_resolving_keys, list) {
3138 if (bacmp(bdaddr, &k->bdaddr) || k->addr_type != addr_type)
3139 continue;
3140
3141 BT_DBG("%s removing %pMR", hdev->name, bdaddr);
3142
3143 list_del(&k->list);
3144 kfree(k);
3145 }
3146}
3147
3148/* HCI command timer function */
3149static void hci_cmd_timeout(unsigned long arg)
3150{
3151 struct hci_dev *hdev = (void *) arg;
3152
3153 if (hdev->sent_cmd) {
3154 struct hci_command_hdr *sent = (void *) hdev->sent_cmd->data;
3155 u16 opcode = __le16_to_cpu(sent->opcode);
3156
3157 BT_ERR("%s command 0x%4.4x tx timeout", hdev->name, opcode);
3158 } else {
3159 BT_ERR("%s command tx timeout", hdev->name);
3160 }
3161
3162 atomic_set(&hdev->cmd_cnt, 1);
3163 queue_work(hdev->workqueue, &hdev->cmd_work);
3164}
3165
3166struct oob_data *hci_find_remote_oob_data(struct hci_dev *hdev,
3167 bdaddr_t *bdaddr)
3168{
3169 struct oob_data *data;
3170
3171 list_for_each_entry(data, &hdev->remote_oob_data, list)
3172 if (bacmp(bdaddr, &data->bdaddr) == 0)
3173 return data;
3174
3175 return NULL;
3176}
3177
3178int hci_remove_remote_oob_data(struct hci_dev *hdev, bdaddr_t *bdaddr)
3179{
3180 struct oob_data *data;
3181
3182 data = hci_find_remote_oob_data(hdev, bdaddr);
3183 if (!data)
3184 return -ENOENT;
3185
3186 BT_DBG("%s removing %pMR", hdev->name, bdaddr);
3187
3188 list_del(&data->list);
3189 kfree(data);
3190
3191 return 0;
3192}
3193
3194void hci_remote_oob_data_clear(struct hci_dev *hdev)
3195{
3196 struct oob_data *data, *n;
3197
3198 list_for_each_entry_safe(data, n, &hdev->remote_oob_data, list) {
3199 list_del(&data->list);
3200 kfree(data);
3201 }
3202}
3203
3204int hci_add_remote_oob_data(struct hci_dev *hdev, bdaddr_t *bdaddr,
3205 u8 *hash, u8 *randomizer)
3206{
3207 struct oob_data *data;
3208
3209 data = hci_find_remote_oob_data(hdev, bdaddr);
3210 if (!data) {
3211 data = kmalloc(sizeof(*data), GFP_KERNEL);
3212 if (!data)
3213 return -ENOMEM;
3214
3215 bacpy(&data->bdaddr, bdaddr);
3216 list_add(&data->list, &hdev->remote_oob_data);
3217 }
3218
3219 memcpy(data->hash192, hash, sizeof(data->hash192));
3220 memcpy(data->randomizer192, randomizer, sizeof(data->randomizer192));
3221
3222 memset(data->hash256, 0, sizeof(data->hash256));
3223 memset(data->randomizer256, 0, sizeof(data->randomizer256));
3224
3225 BT_DBG("%s for %pMR", hdev->name, bdaddr);
3226
3227 return 0;
3228}
3229
3230int hci_add_remote_oob_ext_data(struct hci_dev *hdev, bdaddr_t *bdaddr,
3231 u8 *hash192, u8 *randomizer192,
3232 u8 *hash256, u8 *randomizer256)
3233{
3234 struct oob_data *data;
3235
3236 data = hci_find_remote_oob_data(hdev, bdaddr);
3237 if (!data) {
3238 data = kmalloc(sizeof(*data), GFP_KERNEL);
3239 if (!data)
3240 return -ENOMEM;
3241
3242 bacpy(&data->bdaddr, bdaddr);
3243 list_add(&data->list, &hdev->remote_oob_data);
3244 }
3245
3246 memcpy(data->hash192, hash192, sizeof(data->hash192));
3247 memcpy(data->randomizer192, randomizer192, sizeof(data->randomizer192));
3248
3249 memcpy(data->hash256, hash256, sizeof(data->hash256));
3250 memcpy(data->randomizer256, randomizer256, sizeof(data->randomizer256));
3251
3252 BT_DBG("%s for %pMR", hdev->name, bdaddr);
3253
3254 return 0;
3255}
3256
3257struct bdaddr_list *hci_blacklist_lookup(struct hci_dev *hdev,
3258 bdaddr_t *bdaddr, u8 type)
3259{
3260 struct bdaddr_list *b;
3261
3262 list_for_each_entry(b, &hdev->blacklist, list) {
3263 if (!bacmp(&b->bdaddr, bdaddr) && b->bdaddr_type == type)
3264 return b;
3265 }
3266
3267 return NULL;
3268}
3269
3270static void hci_blacklist_clear(struct hci_dev *hdev)
3271{
3272 struct list_head *p, *n;
3273
3274 list_for_each_safe(p, n, &hdev->blacklist) {
3275 struct bdaddr_list *b = list_entry(p, struct bdaddr_list, list);
3276
3277 list_del(p);
3278 kfree(b);
3279 }
3280}
3281
3282int hci_blacklist_add(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 type)
3283{
3284 struct bdaddr_list *entry;
3285
3286 if (!bacmp(bdaddr, BDADDR_ANY))
3287 return -EBADF;
3288
3289 if (hci_blacklist_lookup(hdev, bdaddr, type))
3290 return -EEXIST;
3291
3292 entry = kzalloc(sizeof(struct bdaddr_list), GFP_KERNEL);
3293 if (!entry)
3294 return -ENOMEM;
3295
3296 bacpy(&entry->bdaddr, bdaddr);
3297 entry->bdaddr_type = type;
3298
3299 list_add(&entry->list, &hdev->blacklist);
3300
3301 return mgmt_device_blocked(hdev, bdaddr, type);
3302}
3303
3304int hci_blacklist_del(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 type)
3305{
3306 struct bdaddr_list *entry;
3307
3308 if (!bacmp(bdaddr, BDADDR_ANY)) {
3309 hci_blacklist_clear(hdev);
3310 return 0;
3311 }
3312
3313 entry = hci_blacklist_lookup(hdev, bdaddr, type);
3314 if (!entry)
3315 return -ENOENT;
3316
3317 list_del(&entry->list);
3318 kfree(entry);
3319
3320 return mgmt_device_unblocked(hdev, bdaddr, type);
3321}
3322
3323struct bdaddr_list *hci_white_list_lookup(struct hci_dev *hdev,
3324 bdaddr_t *bdaddr, u8 type)
3325{
3326 struct bdaddr_list *b;
3327
3328 list_for_each_entry(b, &hdev->le_white_list, list) {
3329 if (!bacmp(&b->bdaddr, bdaddr) && b->bdaddr_type == type)
3330 return b;
3331 }
3332
3333 return NULL;
3334}
3335
3336void hci_white_list_clear(struct hci_dev *hdev)
3337{
3338 struct list_head *p, *n;
3339
3340 list_for_each_safe(p, n, &hdev->le_white_list) {
3341 struct bdaddr_list *b = list_entry(p, struct bdaddr_list, list);
3342
3343 list_del(p);
3344 kfree(b);
3345 }
3346}
3347
3348int hci_white_list_add(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 type)
3349{
3350 struct bdaddr_list *entry;
3351
3352 if (!bacmp(bdaddr, BDADDR_ANY))
3353 return -EBADF;
3354
3355 entry = kzalloc(sizeof(struct bdaddr_list), GFP_KERNEL);
3356 if (!entry)
3357 return -ENOMEM;
3358
3359 bacpy(&entry->bdaddr, bdaddr);
3360 entry->bdaddr_type = type;
3361
3362 list_add(&entry->list, &hdev->le_white_list);
3363
3364 return 0;
3365}
3366
3367int hci_white_list_del(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 type)
3368{
3369 struct bdaddr_list *entry;
3370
3371 if (!bacmp(bdaddr, BDADDR_ANY))
3372 return -EBADF;
3373
3374 entry = hci_white_list_lookup(hdev, bdaddr, type);
3375 if (!entry)
3376 return -ENOENT;
3377
3378 list_del(&entry->list);
3379 kfree(entry);
3380
3381 return 0;
3382}
3383
3384/* This function requires the caller holds hdev->lock */
3385struct hci_conn_params *hci_conn_params_lookup(struct hci_dev *hdev,
3386 bdaddr_t *addr, u8 addr_type)
3387{
3388 struct hci_conn_params *params;
3389
3390 list_for_each_entry(params, &hdev->le_conn_params, list) {
3391 if (bacmp(¶ms->addr, addr) == 0 &&
3392 params->addr_type == addr_type) {
3393 return params;
3394 }
3395 }
3396
3397 return NULL;
3398}
3399
3400static bool is_connected(struct hci_dev *hdev, bdaddr_t *addr, u8 type)
3401{
3402 struct hci_conn *conn;
3403
3404 conn = hci_conn_hash_lookup_ba(hdev, LE_LINK, addr);
3405 if (!conn)
3406 return false;
3407
3408 if (conn->dst_type != type)
3409 return false;
3410
3411 if (conn->state != BT_CONNECTED)
3412 return false;
3413
3414 return true;
3415}
3416
3417static bool is_identity_address(bdaddr_t *addr, u8 addr_type)
3418{
3419 if (addr_type == ADDR_LE_DEV_PUBLIC)
3420 return true;
3421
3422 /* Check for Random Static address type */
3423 if ((addr->b[5] & 0xc0) == 0xc0)
3424 return true;
3425
3426 return false;
3427}
3428
3429/* This function requires the caller holds hdev->lock */
3430int hci_conn_params_add(struct hci_dev *hdev, bdaddr_t *addr, u8 addr_type,
3431 u8 auto_connect, u16 conn_min_interval,
3432 u16 conn_max_interval)
3433{
3434 struct hci_conn_params *params;
3435
3436 if (!is_identity_address(addr, addr_type))
3437 return -EINVAL;
3438
3439 params = hci_conn_params_lookup(hdev, addr, addr_type);
3440 if (params)
3441 goto update;
3442
3443 params = kzalloc(sizeof(*params), GFP_KERNEL);
3444 if (!params) {
3445 BT_ERR("Out of memory");
3446 return -ENOMEM;
3447 }
3448
3449 bacpy(¶ms->addr, addr);
3450 params->addr_type = addr_type;
3451
3452 list_add(¶ms->list, &hdev->le_conn_params);
3453
3454update:
3455 params->conn_min_interval = conn_min_interval;
3456 params->conn_max_interval = conn_max_interval;
3457 params->auto_connect = auto_connect;
3458
3459 switch (auto_connect) {
3460 case HCI_AUTO_CONN_DISABLED:
3461 case HCI_AUTO_CONN_LINK_LOSS:
3462 hci_pend_le_conn_del(hdev, addr, addr_type);
3463 break;
3464 case HCI_AUTO_CONN_ALWAYS:
3465 if (!is_connected(hdev, addr, addr_type))
3466 hci_pend_le_conn_add(hdev, addr, addr_type);
3467 break;
3468 }
3469
3470 BT_DBG("addr %pMR (type %u) auto_connect %u conn_min_interval 0x%.4x "
3471 "conn_max_interval 0x%.4x", addr, addr_type, auto_connect,
3472 conn_min_interval, conn_max_interval);
3473
3474 return 0;
3475}
3476
3477/* This function requires the caller holds hdev->lock */
3478void hci_conn_params_del(struct hci_dev *hdev, bdaddr_t *addr, u8 addr_type)
3479{
3480 struct hci_conn_params *params;
3481
3482 params = hci_conn_params_lookup(hdev, addr, addr_type);
3483 if (!params)
3484 return;
3485
3486 hci_pend_le_conn_del(hdev, addr, addr_type);
3487
3488 list_del(¶ms->list);
3489 kfree(params);
3490
3491 BT_DBG("addr %pMR (type %u)", addr, addr_type);
3492}
3493
3494/* This function requires the caller holds hdev->lock */
3495void hci_conn_params_clear(struct hci_dev *hdev)
3496{
3497 struct hci_conn_params *params, *tmp;
3498
3499 list_for_each_entry_safe(params, tmp, &hdev->le_conn_params, list) {
3500 list_del(¶ms->list);
3501 kfree(params);
3502 }
3503
3504 BT_DBG("All LE connection parameters were removed");
3505}
3506
3507/* This function requires the caller holds hdev->lock */
3508struct bdaddr_list *hci_pend_le_conn_lookup(struct hci_dev *hdev,
3509 bdaddr_t *addr, u8 addr_type)
3510{
3511 struct bdaddr_list *entry;
3512
3513 list_for_each_entry(entry, &hdev->pend_le_conns, list) {
3514 if (bacmp(&entry->bdaddr, addr) == 0 &&
3515 entry->bdaddr_type == addr_type)
3516 return entry;
3517 }
3518
3519 return NULL;
3520}
3521
3522/* This function requires the caller holds hdev->lock */
3523void hci_pend_le_conn_add(struct hci_dev *hdev, bdaddr_t *addr, u8 addr_type)
3524{
3525 struct bdaddr_list *entry;
3526
3527 entry = hci_pend_le_conn_lookup(hdev, addr, addr_type);
3528 if (entry)
3529 goto done;
3530
3531 entry = kzalloc(sizeof(*entry), GFP_KERNEL);
3532 if (!entry) {
3533 BT_ERR("Out of memory");
3534 return;
3535 }
3536
3537 bacpy(&entry->bdaddr, addr);
3538 entry->bdaddr_type = addr_type;
3539
3540 list_add(&entry->list, &hdev->pend_le_conns);
3541
3542 BT_DBG("addr %pMR (type %u)", addr, addr_type);
3543
3544done:
3545 hci_update_background_scan(hdev);
3546}
3547
3548/* This function requires the caller holds hdev->lock */
3549void hci_pend_le_conn_del(struct hci_dev *hdev, bdaddr_t *addr, u8 addr_type)
3550{
3551 struct bdaddr_list *entry;
3552
3553 entry = hci_pend_le_conn_lookup(hdev, addr, addr_type);
3554 if (!entry)
3555 goto done;
3556
3557 list_del(&entry->list);
3558 kfree(entry);
3559
3560 BT_DBG("addr %pMR (type %u)", addr, addr_type);
3561
3562done:
3563 hci_update_background_scan(hdev);
3564}
3565
3566/* This function requires the caller holds hdev->lock */
3567void hci_pend_le_conns_clear(struct hci_dev *hdev)
3568{
3569 struct bdaddr_list *entry, *tmp;
3570
3571 list_for_each_entry_safe(entry, tmp, &hdev->pend_le_conns, list) {
3572 list_del(&entry->list);
3573 kfree(entry);
3574 }
3575
3576 BT_DBG("All LE pending connections cleared");
3577}
3578
3579static void inquiry_complete(struct hci_dev *hdev, u8 status)
3580{
3581 if (status) {
3582 BT_ERR("Failed to start inquiry: status %d", status);
3583
3584 hci_dev_lock(hdev);
3585 hci_discovery_set_state(hdev, DISCOVERY_STOPPED);
3586 hci_dev_unlock(hdev);
3587 return;
3588 }
3589}
3590
3591static void le_scan_disable_work_complete(struct hci_dev *hdev, u8 status)
3592{
3593 /* General inquiry access code (GIAC) */
3594 u8 lap[3] = { 0x33, 0x8b, 0x9e };
3595 struct hci_request req;
3596 struct hci_cp_inquiry cp;
3597 int err;
3598
3599 if (status) {
3600 BT_ERR("Failed to disable LE scanning: status %d", status);
3601 return;
3602 }
3603
3604 switch (hdev->discovery.type) {
3605 case DISCOV_TYPE_LE:
3606 hci_dev_lock(hdev);
3607 hci_discovery_set_state(hdev, DISCOVERY_STOPPED);
3608 hci_dev_unlock(hdev);
3609 break;
3610
3611 case DISCOV_TYPE_INTERLEAVED:
3612 hci_req_init(&req, hdev);
3613
3614 memset(&cp, 0, sizeof(cp));
3615 memcpy(&cp.lap, lap, sizeof(cp.lap));
3616 cp.length = DISCOV_INTERLEAVED_INQUIRY_LEN;
3617 hci_req_add(&req, HCI_OP_INQUIRY, sizeof(cp), &cp);
3618
3619 hci_dev_lock(hdev);
3620
3621 hci_inquiry_cache_flush(hdev);
3622
3623 err = hci_req_run(&req, inquiry_complete);
3624 if (err) {
3625 BT_ERR("Inquiry request failed: err %d", err);
3626 hci_discovery_set_state(hdev, DISCOVERY_STOPPED);
3627 }
3628
3629 hci_dev_unlock(hdev);
3630 break;
3631 }
3632}
3633
3634static void le_scan_disable_work(struct work_struct *work)
3635{
3636 struct hci_dev *hdev = container_of(work, struct hci_dev,
3637 le_scan_disable.work);
3638 struct hci_request req;
3639 int err;
3640
3641 BT_DBG("%s", hdev->name);
3642
3643 hci_req_init(&req, hdev);
3644
3645 hci_req_add_le_scan_disable(&req);
3646
3647 err = hci_req_run(&req, le_scan_disable_work_complete);
3648 if (err)
3649 BT_ERR("Disable LE scanning request failed: err %d", err);
3650}
3651
3652static void set_random_addr(struct hci_request *req, bdaddr_t *rpa)
3653{
3654 struct hci_dev *hdev = req->hdev;
3655
3656 /* If we're advertising or initiating an LE connection we can't
3657 * go ahead and change the random address at this time. This is
3658 * because the eventual initiator address used for the
3659 * subsequently created connection will be undefined (some
3660 * controllers use the new address and others the one we had
3661 * when the operation started).
3662 *
3663 * In this kind of scenario skip the update and let the random
3664 * address be updated at the next cycle.
3665 */
3666 if (test_bit(HCI_ADVERTISING, &hdev->dev_flags) ||
3667 hci_conn_hash_lookup_state(hdev, LE_LINK, BT_CONNECT)) {
3668 BT_DBG("Deferring random address update");
3669 return;
3670 }
3671
3672 hci_req_add(req, HCI_OP_LE_SET_RANDOM_ADDR, 6, rpa);
3673}
3674
3675int hci_update_random_address(struct hci_request *req, bool require_privacy,
3676 u8 *own_addr_type)
3677{
3678 struct hci_dev *hdev = req->hdev;
3679 int err;
3680
3681 /* If privacy is enabled use a resolvable private address. If
3682 * current RPA has expired or there is something else than
3683 * the current RPA in use, then generate a new one.
3684 */
3685 if (test_bit(HCI_PRIVACY, &hdev->dev_flags)) {
3686 int to;
3687
3688 *own_addr_type = ADDR_LE_DEV_RANDOM;
3689
3690 if (!test_and_clear_bit(HCI_RPA_EXPIRED, &hdev->dev_flags) &&
3691 !bacmp(&hdev->random_addr, &hdev->rpa))
3692 return 0;
3693
3694 err = smp_generate_rpa(hdev->tfm_aes, hdev->irk, &hdev->rpa);
3695 if (err < 0) {
3696 BT_ERR("%s failed to generate new RPA", hdev->name);
3697 return err;
3698 }
3699
3700 set_random_addr(req, &hdev->rpa);
3701
3702 to = msecs_to_jiffies(hdev->rpa_timeout * 1000);
3703 queue_delayed_work(hdev->workqueue, &hdev->rpa_expired, to);
3704
3705 return 0;
3706 }
3707
3708 /* In case of required privacy without resolvable private address,
3709 * use an unresolvable private address. This is useful for active
3710 * scanning and non-connectable advertising.
3711 */
3712 if (require_privacy) {
3713 bdaddr_t urpa;
3714
3715 get_random_bytes(&urpa, 6);
3716 urpa.b[5] &= 0x3f; /* Clear two most significant bits */
3717
3718 *own_addr_type = ADDR_LE_DEV_RANDOM;
3719 set_random_addr(req, &urpa);
3720 return 0;
3721 }
3722
3723 /* If forcing static address is in use or there is no public
3724 * address use the static address as random address (but skip
3725 * the HCI command if the current random address is already the
3726 * static one.
3727 */
3728 if (test_bit(HCI_FORCE_STATIC_ADDR, &hdev->dev_flags) ||
3729 !bacmp(&hdev->bdaddr, BDADDR_ANY)) {
3730 *own_addr_type = ADDR_LE_DEV_RANDOM;
3731 if (bacmp(&hdev->static_addr, &hdev->random_addr))
3732 hci_req_add(req, HCI_OP_LE_SET_RANDOM_ADDR, 6,
3733 &hdev->static_addr);
3734 return 0;
3735 }
3736
3737 /* Neither privacy nor static address is being used so use a
3738 * public address.
3739 */
3740 *own_addr_type = ADDR_LE_DEV_PUBLIC;
3741
3742 return 0;
3743}
3744
3745/* Copy the Identity Address of the controller.
3746 *
3747 * If the controller has a public BD_ADDR, then by default use that one.
3748 * If this is a LE only controller without a public address, default to
3749 * the static random address.
3750 *
3751 * For debugging purposes it is possible to force controllers with a
3752 * public address to use the static random address instead.
3753 */
3754void hci_copy_identity_address(struct hci_dev *hdev, bdaddr_t *bdaddr,
3755 u8 *bdaddr_type)
3756{
3757 if (test_bit(HCI_FORCE_STATIC_ADDR, &hdev->dev_flags) ||
3758 !bacmp(&hdev->bdaddr, BDADDR_ANY)) {
3759 bacpy(bdaddr, &hdev->static_addr);
3760 *bdaddr_type = ADDR_LE_DEV_RANDOM;
3761 } else {
3762 bacpy(bdaddr, &hdev->bdaddr);
3763 *bdaddr_type = ADDR_LE_DEV_PUBLIC;
3764 }
3765}
3766
3767/* Alloc HCI device */
3768struct hci_dev *hci_alloc_dev(void)
3769{
3770 struct hci_dev *hdev;
3771
3772 hdev = kzalloc(sizeof(struct hci_dev), GFP_KERNEL);
3773 if (!hdev)
3774 return NULL;
3775
3776 hdev->pkt_type = (HCI_DM1 | HCI_DH1 | HCI_HV1);
3777 hdev->esco_type = (ESCO_HV1);
3778 hdev->link_mode = (HCI_LM_ACCEPT);
3779 hdev->num_iac = 0x01; /* One IAC support is mandatory */
3780 hdev->io_capability = 0x03; /* No Input No Output */
3781 hdev->inq_tx_power = HCI_TX_POWER_INVALID;
3782 hdev->adv_tx_power = HCI_TX_POWER_INVALID;
3783
3784 hdev->sniff_max_interval = 800;
3785 hdev->sniff_min_interval = 80;
3786
3787 hdev->le_adv_channel_map = 0x07;
3788 hdev->le_scan_interval = 0x0060;
3789 hdev->le_scan_window = 0x0030;
3790 hdev->le_conn_min_interval = 0x0028;
3791 hdev->le_conn_max_interval = 0x0038;
3792
3793 hdev->rpa_timeout = HCI_DEFAULT_RPA_TIMEOUT;
3794
3795 mutex_init(&hdev->lock);
3796 mutex_init(&hdev->req_lock);
3797
3798 INIT_LIST_HEAD(&hdev->mgmt_pending);
3799 INIT_LIST_HEAD(&hdev->blacklist);
3800 INIT_LIST_HEAD(&hdev->uuids);
3801 INIT_LIST_HEAD(&hdev->link_keys);
3802 INIT_LIST_HEAD(&hdev->long_term_keys);
3803 INIT_LIST_HEAD(&hdev->identity_resolving_keys);
3804 INIT_LIST_HEAD(&hdev->remote_oob_data);
3805 INIT_LIST_HEAD(&hdev->le_white_list);
3806 INIT_LIST_HEAD(&hdev->le_conn_params);
3807 INIT_LIST_HEAD(&hdev->pend_le_conns);
3808 INIT_LIST_HEAD(&hdev->conn_hash.list);
3809
3810 INIT_WORK(&hdev->rx_work, hci_rx_work);
3811 INIT_WORK(&hdev->cmd_work, hci_cmd_work);
3812 INIT_WORK(&hdev->tx_work, hci_tx_work);
3813 INIT_WORK(&hdev->power_on, hci_power_on);
3814
3815 INIT_DELAYED_WORK(&hdev->power_off, hci_power_off);
3816 INIT_DELAYED_WORK(&hdev->discov_off, hci_discov_off);
3817 INIT_DELAYED_WORK(&hdev->le_scan_disable, le_scan_disable_work);
3818
3819 skb_queue_head_init(&hdev->rx_q);
3820 skb_queue_head_init(&hdev->cmd_q);
3821 skb_queue_head_init(&hdev->raw_q);
3822
3823 init_waitqueue_head(&hdev->req_wait_q);
3824
3825 setup_timer(&hdev->cmd_timer, hci_cmd_timeout, (unsigned long) hdev);
3826
3827 hci_init_sysfs(hdev);
3828 discovery_init(hdev);
3829
3830 return hdev;
3831}
3832EXPORT_SYMBOL(hci_alloc_dev);
3833
3834/* Free HCI device */
3835void hci_free_dev(struct hci_dev *hdev)
3836{
3837 /* will free via device release */
3838 put_device(&hdev->dev);
3839}
3840EXPORT_SYMBOL(hci_free_dev);
3841
3842/* Register HCI device */
3843int hci_register_dev(struct hci_dev *hdev)
3844{
3845 int id, error;
3846
3847 if (!hdev->open || !hdev->close)
3848 return -EINVAL;
3849
3850 /* Do not allow HCI_AMP devices to register at index 0,
3851 * so the index can be used as the AMP controller ID.
3852 */
3853 switch (hdev->dev_type) {
3854 case HCI_BREDR:
3855 id = ida_simple_get(&hci_index_ida, 0, 0, GFP_KERNEL);
3856 break;
3857 case HCI_AMP:
3858 id = ida_simple_get(&hci_index_ida, 1, 0, GFP_KERNEL);
3859 break;
3860 default:
3861 return -EINVAL;
3862 }
3863
3864 if (id < 0)
3865 return id;
3866
3867 sprintf(hdev->name, "hci%d", id);
3868 hdev->id = id;
3869
3870 BT_DBG("%p name %s bus %d", hdev, hdev->name, hdev->bus);
3871
3872 hdev->workqueue = alloc_workqueue("%s", WQ_HIGHPRI | WQ_UNBOUND |
3873 WQ_MEM_RECLAIM, 1, hdev->name);
3874 if (!hdev->workqueue) {
3875 error = -ENOMEM;
3876 goto err;
3877 }
3878
3879 hdev->req_workqueue = alloc_workqueue("%s", WQ_HIGHPRI | WQ_UNBOUND |
3880 WQ_MEM_RECLAIM, 1, hdev->name);
3881 if (!hdev->req_workqueue) {
3882 destroy_workqueue(hdev->workqueue);
3883 error = -ENOMEM;
3884 goto err;
3885 }
3886
3887 if (!IS_ERR_OR_NULL(bt_debugfs))
3888 hdev->debugfs = debugfs_create_dir(hdev->name, bt_debugfs);
3889
3890 dev_set_name(&hdev->dev, "%s", hdev->name);
3891
3892 hdev->tfm_aes = crypto_alloc_blkcipher("ecb(aes)", 0,
3893 CRYPTO_ALG_ASYNC);
3894 if (IS_ERR(hdev->tfm_aes)) {
3895 BT_ERR("Unable to create crypto context");
3896 error = PTR_ERR(hdev->tfm_aes);
3897 hdev->tfm_aes = NULL;
3898 goto err_wqueue;
3899 }
3900
3901 error = device_add(&hdev->dev);
3902 if (error < 0)
3903 goto err_tfm;
3904
3905 hdev->rfkill = rfkill_alloc(hdev->name, &hdev->dev,
3906 RFKILL_TYPE_BLUETOOTH, &hci_rfkill_ops,
3907 hdev);
3908 if (hdev->rfkill) {
3909 if (rfkill_register(hdev->rfkill) < 0) {
3910 rfkill_destroy(hdev->rfkill);
3911 hdev->rfkill = NULL;
3912 }
3913 }
3914
3915 if (hdev->rfkill && rfkill_blocked(hdev->rfkill))
3916 set_bit(HCI_RFKILLED, &hdev->dev_flags);
3917
3918 set_bit(HCI_SETUP, &hdev->dev_flags);
3919 set_bit(HCI_AUTO_OFF, &hdev->dev_flags);
3920
3921 if (hdev->dev_type == HCI_BREDR) {
3922 /* Assume BR/EDR support until proven otherwise (such as
3923 * through reading supported features during init.
3924 */
3925 set_bit(HCI_BREDR_ENABLED, &hdev->dev_flags);
3926 }
3927
3928 write_lock(&hci_dev_list_lock);
3929 list_add(&hdev->list, &hci_dev_list);
3930 write_unlock(&hci_dev_list_lock);
3931
3932 hci_notify(hdev, HCI_DEV_REG);
3933 hci_dev_hold(hdev);
3934
3935 queue_work(hdev->req_workqueue, &hdev->power_on);
3936
3937 return id;
3938
3939err_tfm:
3940 crypto_free_blkcipher(hdev->tfm_aes);
3941err_wqueue:
3942 destroy_workqueue(hdev->workqueue);
3943 destroy_workqueue(hdev->req_workqueue);
3944err:
3945 ida_simple_remove(&hci_index_ida, hdev->id);
3946
3947 return error;
3948}
3949EXPORT_SYMBOL(hci_register_dev);
3950
3951/* Unregister HCI device */
3952void hci_unregister_dev(struct hci_dev *hdev)
3953{
3954 int i, id;
3955
3956 BT_DBG("%p name %s bus %d", hdev, hdev->name, hdev->bus);
3957
3958 set_bit(HCI_UNREGISTER, &hdev->dev_flags);
3959
3960 id = hdev->id;
3961
3962 write_lock(&hci_dev_list_lock);
3963 list_del(&hdev->list);
3964 write_unlock(&hci_dev_list_lock);
3965
3966 hci_dev_do_close(hdev);
3967
3968 for (i = 0; i < NUM_REASSEMBLY; i++)
3969 kfree_skb(hdev->reassembly[i]);
3970
3971 cancel_work_sync(&hdev->power_on);
3972
3973 if (!test_bit(HCI_INIT, &hdev->flags) &&
3974 !test_bit(HCI_SETUP, &hdev->dev_flags)) {
3975 hci_dev_lock(hdev);
3976 mgmt_index_removed(hdev);
3977 hci_dev_unlock(hdev);
3978 }
3979
3980 /* mgmt_index_removed should take care of emptying the
3981 * pending list */
3982 BUG_ON(!list_empty(&hdev->mgmt_pending));
3983
3984 hci_notify(hdev, HCI_DEV_UNREG);
3985
3986 if (hdev->rfkill) {
3987 rfkill_unregister(hdev->rfkill);
3988 rfkill_destroy(hdev->rfkill);
3989 }
3990
3991 if (hdev->tfm_aes)
3992 crypto_free_blkcipher(hdev->tfm_aes);
3993
3994 device_del(&hdev->dev);
3995
3996 debugfs_remove_recursive(hdev->debugfs);
3997
3998 destroy_workqueue(hdev->workqueue);
3999 destroy_workqueue(hdev->req_workqueue);
4000
4001 hci_dev_lock(hdev);
4002 hci_blacklist_clear(hdev);
4003 hci_uuids_clear(hdev);
4004 hci_link_keys_clear(hdev);
4005 hci_smp_ltks_clear(hdev);
4006 hci_smp_irks_clear(hdev);
4007 hci_remote_oob_data_clear(hdev);
4008 hci_white_list_clear(hdev);
4009 hci_conn_params_clear(hdev);
4010 hci_pend_le_conns_clear(hdev);
4011 hci_dev_unlock(hdev);
4012
4013 hci_dev_put(hdev);
4014
4015 ida_simple_remove(&hci_index_ida, id);
4016}
4017EXPORT_SYMBOL(hci_unregister_dev);
4018
4019/* Suspend HCI device */
4020int hci_suspend_dev(struct hci_dev *hdev)
4021{
4022 hci_notify(hdev, HCI_DEV_SUSPEND);
4023 return 0;
4024}
4025EXPORT_SYMBOL(hci_suspend_dev);
4026
4027/* Resume HCI device */
4028int hci_resume_dev(struct hci_dev *hdev)
4029{
4030 hci_notify(hdev, HCI_DEV_RESUME);
4031 return 0;
4032}
4033EXPORT_SYMBOL(hci_resume_dev);
4034
4035/* Receive frame from HCI drivers */
4036int hci_recv_frame(struct hci_dev *hdev, struct sk_buff *skb)
4037{
4038 if (!hdev || (!test_bit(HCI_UP, &hdev->flags)
4039 && !test_bit(HCI_INIT, &hdev->flags))) {
4040 kfree_skb(skb);
4041 return -ENXIO;
4042 }
4043
4044 /* Incoming skb */
4045 bt_cb(skb)->incoming = 1;
4046
4047 /* Time stamp */
4048 __net_timestamp(skb);
4049
4050 skb_queue_tail(&hdev->rx_q, skb);
4051 queue_work(hdev->workqueue, &hdev->rx_work);
4052
4053 return 0;
4054}
4055EXPORT_SYMBOL(hci_recv_frame);
4056
4057static int hci_reassembly(struct hci_dev *hdev, int type, void *data,
4058 int count, __u8 index)
4059{
4060 int len = 0;
4061 int hlen = 0;
4062 int remain = count;
4063 struct sk_buff *skb;
4064 struct bt_skb_cb *scb;
4065
4066 if ((type < HCI_ACLDATA_PKT || type > HCI_EVENT_PKT) ||
4067 index >= NUM_REASSEMBLY)
4068 return -EILSEQ;
4069
4070 skb = hdev->reassembly[index];
4071
4072 if (!skb) {
4073 switch (type) {
4074 case HCI_ACLDATA_PKT:
4075 len = HCI_MAX_FRAME_SIZE;
4076 hlen = HCI_ACL_HDR_SIZE;
4077 break;
4078 case HCI_EVENT_PKT:
4079 len = HCI_MAX_EVENT_SIZE;
4080 hlen = HCI_EVENT_HDR_SIZE;
4081 break;
4082 case HCI_SCODATA_PKT:
4083 len = HCI_MAX_SCO_SIZE;
4084 hlen = HCI_SCO_HDR_SIZE;
4085 break;
4086 }
4087
4088 skb = bt_skb_alloc(len, GFP_ATOMIC);
4089 if (!skb)
4090 return -ENOMEM;
4091
4092 scb = (void *) skb->cb;
4093 scb->expect = hlen;
4094 scb->pkt_type = type;
4095
4096 hdev->reassembly[index] = skb;
4097 }
4098
4099 while (count) {
4100 scb = (void *) skb->cb;
4101 len = min_t(uint, scb->expect, count);
4102
4103 memcpy(skb_put(skb, len), data, len);
4104
4105 count -= len;
4106 data += len;
4107 scb->expect -= len;
4108 remain = count;
4109
4110 switch (type) {
4111 case HCI_EVENT_PKT:
4112 if (skb->len == HCI_EVENT_HDR_SIZE) {
4113 struct hci_event_hdr *h = hci_event_hdr(skb);
4114 scb->expect = h->plen;
4115
4116 if (skb_tailroom(skb) < scb->expect) {
4117 kfree_skb(skb);
4118 hdev->reassembly[index] = NULL;
4119 return -ENOMEM;
4120 }
4121 }
4122 break;
4123
4124 case HCI_ACLDATA_PKT:
4125 if (skb->len == HCI_ACL_HDR_SIZE) {
4126 struct hci_acl_hdr *h = hci_acl_hdr(skb);
4127 scb->expect = __le16_to_cpu(h->dlen);
4128
4129 if (skb_tailroom(skb) < scb->expect) {
4130 kfree_skb(skb);
4131 hdev->reassembly[index] = NULL;
4132 return -ENOMEM;
4133 }
4134 }
4135 break;
4136
4137 case HCI_SCODATA_PKT:
4138 if (skb->len == HCI_SCO_HDR_SIZE) {
4139 struct hci_sco_hdr *h = hci_sco_hdr(skb);
4140 scb->expect = h->dlen;
4141
4142 if (skb_tailroom(skb) < scb->expect) {
4143 kfree_skb(skb);
4144 hdev->reassembly[index] = NULL;
4145 return -ENOMEM;
4146 }
4147 }
4148 break;
4149 }
4150
4151 if (scb->expect == 0) {
4152 /* Complete frame */
4153
4154 bt_cb(skb)->pkt_type = type;
4155 hci_recv_frame(hdev, skb);
4156
4157 hdev->reassembly[index] = NULL;
4158 return remain;
4159 }
4160 }
4161
4162 return remain;
4163}
4164
4165int hci_recv_fragment(struct hci_dev *hdev, int type, void *data, int count)
4166{
4167 int rem = 0;
4168
4169 if (type < HCI_ACLDATA_PKT || type > HCI_EVENT_PKT)
4170 return -EILSEQ;
4171
4172 while (count) {
4173 rem = hci_reassembly(hdev, type, data, count, type - 1);
4174 if (rem < 0)
4175 return rem;
4176
4177 data += (count - rem);
4178 count = rem;
4179 }
4180
4181 return rem;
4182}
4183EXPORT_SYMBOL(hci_recv_fragment);
4184
4185#define STREAM_REASSEMBLY 0
4186
4187int hci_recv_stream_fragment(struct hci_dev *hdev, void *data, int count)
4188{
4189 int type;
4190 int rem = 0;
4191
4192 while (count) {
4193 struct sk_buff *skb = hdev->reassembly[STREAM_REASSEMBLY];
4194
4195 if (!skb) {
4196 struct { char type; } *pkt;
4197
4198 /* Start of the frame */
4199 pkt = data;
4200 type = pkt->type;
4201
4202 data++;
4203 count--;
4204 } else
4205 type = bt_cb(skb)->pkt_type;
4206
4207 rem = hci_reassembly(hdev, type, data, count,
4208 STREAM_REASSEMBLY);
4209 if (rem < 0)
4210 return rem;
4211
4212 data += (count - rem);
4213 count = rem;
4214 }
4215
4216 return rem;
4217}
4218EXPORT_SYMBOL(hci_recv_stream_fragment);
4219
4220/* ---- Interface to upper protocols ---- */
4221
4222int hci_register_cb(struct hci_cb *cb)
4223{
4224 BT_DBG("%p name %s", cb, cb->name);
4225
4226 write_lock(&hci_cb_list_lock);
4227 list_add(&cb->list, &hci_cb_list);
4228 write_unlock(&hci_cb_list_lock);
4229
4230 return 0;
4231}
4232EXPORT_SYMBOL(hci_register_cb);
4233
4234int hci_unregister_cb(struct hci_cb *cb)
4235{
4236 BT_DBG("%p name %s", cb, cb->name);
4237
4238 write_lock(&hci_cb_list_lock);
4239 list_del(&cb->list);
4240 write_unlock(&hci_cb_list_lock);
4241
4242 return 0;
4243}
4244EXPORT_SYMBOL(hci_unregister_cb);
4245
4246static void hci_send_frame(struct hci_dev *hdev, struct sk_buff *skb)
4247{
4248 BT_DBG("%s type %d len %d", hdev->name, bt_cb(skb)->pkt_type, skb->len);
4249
4250 /* Time stamp */
4251 __net_timestamp(skb);
4252
4253 /* Send copy to monitor */
4254 hci_send_to_monitor(hdev, skb);
4255
4256 if (atomic_read(&hdev->promisc)) {
4257 /* Send copy to the sockets */
4258 hci_send_to_sock(hdev, skb);
4259 }
4260
4261 /* Get rid of skb owner, prior to sending to the driver. */
4262 skb_orphan(skb);
4263
4264 if (hdev->send(hdev, skb) < 0)
4265 BT_ERR("%s sending frame failed", hdev->name);
4266}
4267
4268void hci_req_init(struct hci_request *req, struct hci_dev *hdev)
4269{
4270 skb_queue_head_init(&req->cmd_q);
4271 req->hdev = hdev;
4272 req->err = 0;
4273}
4274
4275int hci_req_run(struct hci_request *req, hci_req_complete_t complete)
4276{
4277 struct hci_dev *hdev = req->hdev;
4278 struct sk_buff *skb;
4279 unsigned long flags;
4280
4281 BT_DBG("length %u", skb_queue_len(&req->cmd_q));
4282
4283 /* If an error occured during request building, remove all HCI
4284 * commands queued on the HCI request queue.
4285 */
4286 if (req->err) {
4287 skb_queue_purge(&req->cmd_q);
4288 return req->err;
4289 }
4290
4291 /* Do not allow empty requests */
4292 if (skb_queue_empty(&req->cmd_q))
4293 return -ENODATA;
4294
4295 skb = skb_peek_tail(&req->cmd_q);
4296 bt_cb(skb)->req.complete = complete;
4297
4298 spin_lock_irqsave(&hdev->cmd_q.lock, flags);
4299 skb_queue_splice_tail(&req->cmd_q, &hdev->cmd_q);
4300 spin_unlock_irqrestore(&hdev->cmd_q.lock, flags);
4301
4302 queue_work(hdev->workqueue, &hdev->cmd_work);
4303
4304 return 0;
4305}
4306
4307static struct sk_buff *hci_prepare_cmd(struct hci_dev *hdev, u16 opcode,
4308 u32 plen, const void *param)
4309{
4310 int len = HCI_COMMAND_HDR_SIZE + plen;
4311 struct hci_command_hdr *hdr;
4312 struct sk_buff *skb;
4313
4314 skb = bt_skb_alloc(len, GFP_ATOMIC);
4315 if (!skb)
4316 return NULL;
4317
4318 hdr = (struct hci_command_hdr *) skb_put(skb, HCI_COMMAND_HDR_SIZE);
4319 hdr->opcode = cpu_to_le16(opcode);
4320 hdr->plen = plen;
4321
4322 if (plen)
4323 memcpy(skb_put(skb, plen), param, plen);
4324
4325 BT_DBG("skb len %d", skb->len);
4326
4327 bt_cb(skb)->pkt_type = HCI_COMMAND_PKT;
4328
4329 return skb;
4330}
4331
4332/* Send HCI command */
4333int hci_send_cmd(struct hci_dev *hdev, __u16 opcode, __u32 plen,
4334 const void *param)
4335{
4336 struct sk_buff *skb;
4337
4338 BT_DBG("%s opcode 0x%4.4x plen %d", hdev->name, opcode, plen);
4339
4340 skb = hci_prepare_cmd(hdev, opcode, plen, param);
4341 if (!skb) {
4342 BT_ERR("%s no memory for command", hdev->name);
4343 return -ENOMEM;
4344 }
4345
4346 /* Stand-alone HCI commands must be flaged as
4347 * single-command requests.
4348 */
4349 bt_cb(skb)->req.start = true;
4350
4351 skb_queue_tail(&hdev->cmd_q, skb);
4352 queue_work(hdev->workqueue, &hdev->cmd_work);
4353
4354 return 0;
4355}
4356
4357/* Queue a command to an asynchronous HCI request */
4358void hci_req_add_ev(struct hci_request *req, u16 opcode, u32 plen,
4359 const void *param, u8 event)
4360{
4361 struct hci_dev *hdev = req->hdev;
4362 struct sk_buff *skb;
4363
4364 BT_DBG("%s opcode 0x%4.4x plen %d", hdev->name, opcode, plen);
4365
4366 /* If an error occured during request building, there is no point in
4367 * queueing the HCI command. We can simply return.
4368 */
4369 if (req->err)
4370 return;
4371
4372 skb = hci_prepare_cmd(hdev, opcode, plen, param);
4373 if (!skb) {
4374 BT_ERR("%s no memory for command (opcode 0x%4.4x)",
4375 hdev->name, opcode);
4376 req->err = -ENOMEM;
4377 return;
4378 }
4379
4380 if (skb_queue_empty(&req->cmd_q))
4381 bt_cb(skb)->req.start = true;
4382
4383 bt_cb(skb)->req.event = event;
4384
4385 skb_queue_tail(&req->cmd_q, skb);
4386}
4387
4388void hci_req_add(struct hci_request *req, u16 opcode, u32 plen,
4389 const void *param)
4390{
4391 hci_req_add_ev(req, opcode, plen, param, 0);
4392}
4393
4394/* Get data from the previously sent command */
4395void *hci_sent_cmd_data(struct hci_dev *hdev, __u16 opcode)
4396{
4397 struct hci_command_hdr *hdr;
4398
4399 if (!hdev->sent_cmd)
4400 return NULL;
4401
4402 hdr = (void *) hdev->sent_cmd->data;
4403
4404 if (hdr->opcode != cpu_to_le16(opcode))
4405 return NULL;
4406
4407 BT_DBG("%s opcode 0x%4.4x", hdev->name, opcode);
4408
4409 return hdev->sent_cmd->data + HCI_COMMAND_HDR_SIZE;
4410}
4411
4412/* Send ACL data */
4413static void hci_add_acl_hdr(struct sk_buff *skb, __u16 handle, __u16 flags)
4414{
4415 struct hci_acl_hdr *hdr;
4416 int len = skb->len;
4417
4418 skb_push(skb, HCI_ACL_HDR_SIZE);
4419 skb_reset_transport_header(skb);
4420 hdr = (struct hci_acl_hdr *)skb_transport_header(skb);
4421 hdr->handle = cpu_to_le16(hci_handle_pack(handle, flags));
4422 hdr->dlen = cpu_to_le16(len);
4423}
4424
4425static void hci_queue_acl(struct hci_chan *chan, struct sk_buff_head *queue,
4426 struct sk_buff *skb, __u16 flags)
4427{
4428 struct hci_conn *conn = chan->conn;
4429 struct hci_dev *hdev = conn->hdev;
4430 struct sk_buff *list;
4431
4432 skb->len = skb_headlen(skb);
4433 skb->data_len = 0;
4434
4435 bt_cb(skb)->pkt_type = HCI_ACLDATA_PKT;
4436
4437 switch (hdev->dev_type) {
4438 case HCI_BREDR:
4439 hci_add_acl_hdr(skb, conn->handle, flags);
4440 break;
4441 case HCI_AMP:
4442 hci_add_acl_hdr(skb, chan->handle, flags);
4443 break;
4444 default:
4445 BT_ERR("%s unknown dev_type %d", hdev->name, hdev->dev_type);
4446 return;
4447 }
4448
4449 list = skb_shinfo(skb)->frag_list;
4450 if (!list) {
4451 /* Non fragmented */
4452 BT_DBG("%s nonfrag skb %p len %d", hdev->name, skb, skb->len);
4453
4454 skb_queue_tail(queue, skb);
4455 } else {
4456 /* Fragmented */
4457 BT_DBG("%s frag %p len %d", hdev->name, skb, skb->len);
4458
4459 skb_shinfo(skb)->frag_list = NULL;
4460
4461 /* Queue all fragments atomically */
4462 spin_lock(&queue->lock);
4463
4464 __skb_queue_tail(queue, skb);
4465
4466 flags &= ~ACL_START;
4467 flags |= ACL_CONT;
4468 do {
4469 skb = list; list = list->next;
4470
4471 bt_cb(skb)->pkt_type = HCI_ACLDATA_PKT;
4472 hci_add_acl_hdr(skb, conn->handle, flags);
4473
4474 BT_DBG("%s frag %p len %d", hdev->name, skb, skb->len);
4475
4476 __skb_queue_tail(queue, skb);
4477 } while (list);
4478
4479 spin_unlock(&queue->lock);
4480 }
4481}
4482
4483void hci_send_acl(struct hci_chan *chan, struct sk_buff *skb, __u16 flags)
4484{
4485 struct hci_dev *hdev = chan->conn->hdev;
4486
4487 BT_DBG("%s chan %p flags 0x%4.4x", hdev->name, chan, flags);
4488
4489 hci_queue_acl(chan, &chan->data_q, skb, flags);
4490
4491 queue_work(hdev->workqueue, &hdev->tx_work);
4492}
4493
4494/* Send SCO data */
4495void hci_send_sco(struct hci_conn *conn, struct sk_buff *skb)
4496{
4497 struct hci_dev *hdev = conn->hdev;
4498 struct hci_sco_hdr hdr;
4499
4500 BT_DBG("%s len %d", hdev->name, skb->len);
4501
4502 hdr.handle = cpu_to_le16(conn->handle);
4503 hdr.dlen = skb->len;
4504
4505 skb_push(skb, HCI_SCO_HDR_SIZE);
4506 skb_reset_transport_header(skb);
4507 memcpy(skb_transport_header(skb), &hdr, HCI_SCO_HDR_SIZE);
4508
4509 bt_cb(skb)->pkt_type = HCI_SCODATA_PKT;
4510
4511 skb_queue_tail(&conn->data_q, skb);
4512 queue_work(hdev->workqueue, &hdev->tx_work);
4513}
4514
4515/* ---- HCI TX task (outgoing data) ---- */
4516
4517/* HCI Connection scheduler */
4518static struct hci_conn *hci_low_sent(struct hci_dev *hdev, __u8 type,
4519 int *quote)
4520{
4521 struct hci_conn_hash *h = &hdev->conn_hash;
4522 struct hci_conn *conn = NULL, *c;
4523 unsigned int num = 0, min = ~0;
4524
4525 /* We don't have to lock device here. Connections are always
4526 * added and removed with TX task disabled. */
4527
4528 rcu_read_lock();
4529
4530 list_for_each_entry_rcu(c, &h->list, list) {
4531 if (c->type != type || skb_queue_empty(&c->data_q))
4532 continue;
4533
4534 if (c->state != BT_CONNECTED && c->state != BT_CONFIG)
4535 continue;
4536
4537 num++;
4538
4539 if (c->sent < min) {
4540 min = c->sent;
4541 conn = c;
4542 }
4543
4544 if (hci_conn_num(hdev, type) == num)
4545 break;
4546 }
4547
4548 rcu_read_unlock();
4549
4550 if (conn) {
4551 int cnt, q;
4552
4553 switch (conn->type) {
4554 case ACL_LINK:
4555 cnt = hdev->acl_cnt;
4556 break;
4557 case SCO_LINK:
4558 case ESCO_LINK:
4559 cnt = hdev->sco_cnt;
4560 break;
4561 case LE_LINK:
4562 cnt = hdev->le_mtu ? hdev->le_cnt : hdev->acl_cnt;
4563 break;
4564 default:
4565 cnt = 0;
4566 BT_ERR("Unknown link type");
4567 }
4568
4569 q = cnt / num;
4570 *quote = q ? q : 1;
4571 } else
4572 *quote = 0;
4573
4574 BT_DBG("conn %p quote %d", conn, *quote);
4575 return conn;
4576}
4577
4578static void hci_link_tx_to(struct hci_dev *hdev, __u8 type)
4579{
4580 struct hci_conn_hash *h = &hdev->conn_hash;
4581 struct hci_conn *c;
4582
4583 BT_ERR("%s link tx timeout", hdev->name);
4584
4585 rcu_read_lock();
4586
4587 /* Kill stalled connections */
4588 list_for_each_entry_rcu(c, &h->list, list) {
4589 if (c->type == type && c->sent) {
4590 BT_ERR("%s killing stalled connection %pMR",
4591 hdev->name, &c->dst);
4592 hci_disconnect(c, HCI_ERROR_REMOTE_USER_TERM);
4593 }
4594 }
4595
4596 rcu_read_unlock();
4597}
4598
4599static struct hci_chan *hci_chan_sent(struct hci_dev *hdev, __u8 type,
4600 int *quote)
4601{
4602 struct hci_conn_hash *h = &hdev->conn_hash;
4603 struct hci_chan *chan = NULL;
4604 unsigned int num = 0, min = ~0, cur_prio = 0;
4605 struct hci_conn *conn;
4606 int cnt, q, conn_num = 0;
4607
4608 BT_DBG("%s", hdev->name);
4609
4610 rcu_read_lock();
4611
4612 list_for_each_entry_rcu(conn, &h->list, list) {
4613 struct hci_chan *tmp;
4614
4615 if (conn->type != type)
4616 continue;
4617
4618 if (conn->state != BT_CONNECTED && conn->state != BT_CONFIG)
4619 continue;
4620
4621 conn_num++;
4622
4623 list_for_each_entry_rcu(tmp, &conn->chan_list, list) {
4624 struct sk_buff *skb;
4625
4626 if (skb_queue_empty(&tmp->data_q))
4627 continue;
4628
4629 skb = skb_peek(&tmp->data_q);
4630 if (skb->priority < cur_prio)
4631 continue;
4632
4633 if (skb->priority > cur_prio) {
4634 num = 0;
4635 min = ~0;
4636 cur_prio = skb->priority;
4637 }
4638
4639 num++;
4640
4641 if (conn->sent < min) {
4642 min = conn->sent;
4643 chan = tmp;
4644 }
4645 }
4646
4647 if (hci_conn_num(hdev, type) == conn_num)
4648 break;
4649 }
4650
4651 rcu_read_unlock();
4652
4653 if (!chan)
4654 return NULL;
4655
4656 switch (chan->conn->type) {
4657 case ACL_LINK:
4658 cnt = hdev->acl_cnt;
4659 break;
4660 case AMP_LINK:
4661 cnt = hdev->block_cnt;
4662 break;
4663 case SCO_LINK:
4664 case ESCO_LINK:
4665 cnt = hdev->sco_cnt;
4666 break;
4667 case LE_LINK:
4668 cnt = hdev->le_mtu ? hdev->le_cnt : hdev->acl_cnt;
4669 break;
4670 default:
4671 cnt = 0;
4672 BT_ERR("Unknown link type");
4673 }
4674
4675 q = cnt / num;
4676 *quote = q ? q : 1;
4677 BT_DBG("chan %p quote %d", chan, *quote);
4678 return chan;
4679}
4680
4681static void hci_prio_recalculate(struct hci_dev *hdev, __u8 type)
4682{
4683 struct hci_conn_hash *h = &hdev->conn_hash;
4684 struct hci_conn *conn;
4685 int num = 0;
4686
4687 BT_DBG("%s", hdev->name);
4688
4689 rcu_read_lock();
4690
4691 list_for_each_entry_rcu(conn, &h->list, list) {
4692 struct hci_chan *chan;
4693
4694 if (conn->type != type)
4695 continue;
4696
4697 if (conn->state != BT_CONNECTED && conn->state != BT_CONFIG)
4698 continue;
4699
4700 num++;
4701
4702 list_for_each_entry_rcu(chan, &conn->chan_list, list) {
4703 struct sk_buff *skb;
4704
4705 if (chan->sent) {
4706 chan->sent = 0;
4707 continue;
4708 }
4709
4710 if (skb_queue_empty(&chan->data_q))
4711 continue;
4712
4713 skb = skb_peek(&chan->data_q);
4714 if (skb->priority >= HCI_PRIO_MAX - 1)
4715 continue;
4716
4717 skb->priority = HCI_PRIO_MAX - 1;
4718
4719 BT_DBG("chan %p skb %p promoted to %d", chan, skb,
4720 skb->priority);
4721 }
4722
4723 if (hci_conn_num(hdev, type) == num)
4724 break;
4725 }
4726
4727 rcu_read_unlock();
4728
4729}
4730
4731static inline int __get_blocks(struct hci_dev *hdev, struct sk_buff *skb)
4732{
4733 /* Calculate count of blocks used by this packet */
4734 return DIV_ROUND_UP(skb->len - HCI_ACL_HDR_SIZE, hdev->block_len);
4735}
4736
4737static void __check_timeout(struct hci_dev *hdev, unsigned int cnt)
4738{
4739 if (!test_bit(HCI_RAW, &hdev->flags)) {
4740 /* ACL tx timeout must be longer than maximum
4741 * link supervision timeout (40.9 seconds) */
4742 if (!cnt && time_after(jiffies, hdev->acl_last_tx +
4743 HCI_ACL_TX_TIMEOUT))
4744 hci_link_tx_to(hdev, ACL_LINK);
4745 }
4746}
4747
4748static void hci_sched_acl_pkt(struct hci_dev *hdev)
4749{
4750 unsigned int cnt = hdev->acl_cnt;
4751 struct hci_chan *chan;
4752 struct sk_buff *skb;
4753 int quote;
4754
4755 __check_timeout(hdev, cnt);
4756
4757 while (hdev->acl_cnt &&
4758 (chan = hci_chan_sent(hdev, ACL_LINK, "e))) {
4759 u32 priority = (skb_peek(&chan->data_q))->priority;
4760 while (quote-- && (skb = skb_peek(&chan->data_q))) {
4761 BT_DBG("chan %p skb %p len %d priority %u", chan, skb,
4762 skb->len, skb->priority);
4763
4764 /* Stop if priority has changed */
4765 if (skb->priority < priority)
4766 break;
4767
4768 skb = skb_dequeue(&chan->data_q);
4769
4770 hci_conn_enter_active_mode(chan->conn,
4771 bt_cb(skb)->force_active);
4772
4773 hci_send_frame(hdev, skb);
4774 hdev->acl_last_tx = jiffies;
4775
4776 hdev->acl_cnt--;
4777 chan->sent++;
4778 chan->conn->sent++;
4779 }
4780 }
4781
4782 if (cnt != hdev->acl_cnt)
4783 hci_prio_recalculate(hdev, ACL_LINK);
4784}
4785
4786static void hci_sched_acl_blk(struct hci_dev *hdev)
4787{
4788 unsigned int cnt = hdev->block_cnt;
4789 struct hci_chan *chan;
4790 struct sk_buff *skb;
4791 int quote;
4792 u8 type;
4793
4794 __check_timeout(hdev, cnt);
4795
4796 BT_DBG("%s", hdev->name);
4797
4798 if (hdev->dev_type == HCI_AMP)
4799 type = AMP_LINK;
4800 else
4801 type = ACL_LINK;
4802
4803 while (hdev->block_cnt > 0 &&
4804 (chan = hci_chan_sent(hdev, type, "e))) {
4805 u32 priority = (skb_peek(&chan->data_q))->priority;
4806 while (quote > 0 && (skb = skb_peek(&chan->data_q))) {
4807 int blocks;
4808
4809 BT_DBG("chan %p skb %p len %d priority %u", chan, skb,
4810 skb->len, skb->priority);
4811
4812 /* Stop if priority has changed */
4813 if (skb->priority < priority)
4814 break;
4815
4816 skb = skb_dequeue(&chan->data_q);
4817
4818 blocks = __get_blocks(hdev, skb);
4819 if (blocks > hdev->block_cnt)
4820 return;
4821
4822 hci_conn_enter_active_mode(chan->conn,
4823 bt_cb(skb)->force_active);
4824
4825 hci_send_frame(hdev, skb);
4826 hdev->acl_last_tx = jiffies;
4827
4828 hdev->block_cnt -= blocks;
4829 quote -= blocks;
4830
4831 chan->sent += blocks;
4832 chan->conn->sent += blocks;
4833 }
4834 }
4835
4836 if (cnt != hdev->block_cnt)
4837 hci_prio_recalculate(hdev, type);
4838}
4839
4840static void hci_sched_acl(struct hci_dev *hdev)
4841{
4842 BT_DBG("%s", hdev->name);
4843
4844 /* No ACL link over BR/EDR controller */
4845 if (!hci_conn_num(hdev, ACL_LINK) && hdev->dev_type == HCI_BREDR)
4846 return;
4847
4848 /* No AMP link over AMP controller */
4849 if (!hci_conn_num(hdev, AMP_LINK) && hdev->dev_type == HCI_AMP)
4850 return;
4851
4852 switch (hdev->flow_ctl_mode) {
4853 case HCI_FLOW_CTL_MODE_PACKET_BASED:
4854 hci_sched_acl_pkt(hdev);
4855 break;
4856
4857 case HCI_FLOW_CTL_MODE_BLOCK_BASED:
4858 hci_sched_acl_blk(hdev);
4859 break;
4860 }
4861}
4862
4863/* Schedule SCO */
4864static void hci_sched_sco(struct hci_dev *hdev)
4865{
4866 struct hci_conn *conn;
4867 struct sk_buff *skb;
4868 int quote;
4869
4870 BT_DBG("%s", hdev->name);
4871
4872 if (!hci_conn_num(hdev, SCO_LINK))
4873 return;
4874
4875 while (hdev->sco_cnt && (conn = hci_low_sent(hdev, SCO_LINK, "e))) {
4876 while (quote-- && (skb = skb_dequeue(&conn->data_q))) {
4877 BT_DBG("skb %p len %d", skb, skb->len);
4878 hci_send_frame(hdev, skb);
4879
4880 conn->sent++;
4881 if (conn->sent == ~0)
4882 conn->sent = 0;
4883 }
4884 }
4885}
4886
4887static void hci_sched_esco(struct hci_dev *hdev)
4888{
4889 struct hci_conn *conn;
4890 struct sk_buff *skb;
4891 int quote;
4892
4893 BT_DBG("%s", hdev->name);
4894
4895 if (!hci_conn_num(hdev, ESCO_LINK))
4896 return;
4897
4898 while (hdev->sco_cnt && (conn = hci_low_sent(hdev, ESCO_LINK,
4899 "e))) {
4900 while (quote-- && (skb = skb_dequeue(&conn->data_q))) {
4901 BT_DBG("skb %p len %d", skb, skb->len);
4902 hci_send_frame(hdev, skb);
4903
4904 conn->sent++;
4905 if (conn->sent == ~0)
4906 conn->sent = 0;
4907 }
4908 }
4909}
4910
4911static void hci_sched_le(struct hci_dev *hdev)
4912{
4913 struct hci_chan *chan;
4914 struct sk_buff *skb;
4915 int quote, cnt, tmp;
4916
4917 BT_DBG("%s", hdev->name);
4918
4919 if (!hci_conn_num(hdev, LE_LINK))
4920 return;
4921
4922 if (!test_bit(HCI_RAW, &hdev->flags)) {
4923 /* LE tx timeout must be longer than maximum
4924 * link supervision timeout (40.9 seconds) */
4925 if (!hdev->le_cnt && hdev->le_pkts &&
4926 time_after(jiffies, hdev->le_last_tx + HZ * 45))
4927 hci_link_tx_to(hdev, LE_LINK);
4928 }
4929
4930 cnt = hdev->le_pkts ? hdev->le_cnt : hdev->acl_cnt;
4931 tmp = cnt;
4932 while (cnt && (chan = hci_chan_sent(hdev, LE_LINK, "e))) {
4933 u32 priority = (skb_peek(&chan->data_q))->priority;
4934 while (quote-- && (skb = skb_peek(&chan->data_q))) {
4935 BT_DBG("chan %p skb %p len %d priority %u", chan, skb,
4936 skb->len, skb->priority);
4937
4938 /* Stop if priority has changed */
4939 if (skb->priority < priority)
4940 break;
4941
4942 skb = skb_dequeue(&chan->data_q);
4943
4944 hci_send_frame(hdev, skb);
4945 hdev->le_last_tx = jiffies;
4946
4947 cnt--;
4948 chan->sent++;
4949 chan->conn->sent++;
4950 }
4951 }
4952
4953 if (hdev->le_pkts)
4954 hdev->le_cnt = cnt;
4955 else
4956 hdev->acl_cnt = cnt;
4957
4958 if (cnt != tmp)
4959 hci_prio_recalculate(hdev, LE_LINK);
4960}
4961
4962static void hci_tx_work(struct work_struct *work)
4963{
4964 struct hci_dev *hdev = container_of(work, struct hci_dev, tx_work);
4965 struct sk_buff *skb;
4966
4967 BT_DBG("%s acl %d sco %d le %d", hdev->name, hdev->acl_cnt,
4968 hdev->sco_cnt, hdev->le_cnt);
4969
4970 if (!test_bit(HCI_USER_CHANNEL, &hdev->dev_flags)) {
4971 /* Schedule queues and send stuff to HCI driver */
4972 hci_sched_acl(hdev);
4973 hci_sched_sco(hdev);
4974 hci_sched_esco(hdev);
4975 hci_sched_le(hdev);
4976 }
4977
4978 /* Send next queued raw (unknown type) packet */
4979 while ((skb = skb_dequeue(&hdev->raw_q)))
4980 hci_send_frame(hdev, skb);
4981}
4982
4983/* ----- HCI RX task (incoming data processing) ----- */
4984
4985/* ACL data packet */
4986static void hci_acldata_packet(struct hci_dev *hdev, struct sk_buff *skb)
4987{
4988 struct hci_acl_hdr *hdr = (void *) skb->data;
4989 struct hci_conn *conn;
4990 __u16 handle, flags;
4991
4992 skb_pull(skb, HCI_ACL_HDR_SIZE);
4993
4994 handle = __le16_to_cpu(hdr->handle);
4995 flags = hci_flags(handle);
4996 handle = hci_handle(handle);
4997
4998 BT_DBG("%s len %d handle 0x%4.4x flags 0x%4.4x", hdev->name, skb->len,
4999 handle, flags);
5000
5001 hdev->stat.acl_rx++;
5002
5003 hci_dev_lock(hdev);
5004 conn = hci_conn_hash_lookup_handle(hdev, handle);
5005 hci_dev_unlock(hdev);
5006
5007 if (conn) {
5008 hci_conn_enter_active_mode(conn, BT_POWER_FORCE_ACTIVE_OFF);
5009
5010 /* Send to upper protocol */
5011 l2cap_recv_acldata(conn, skb, flags);
5012 return;
5013 } else {
5014 BT_ERR("%s ACL packet for unknown connection handle %d",
5015 hdev->name, handle);
5016 }
5017
5018 kfree_skb(skb);
5019}
5020
5021/* SCO data packet */
5022static void hci_scodata_packet(struct hci_dev *hdev, struct sk_buff *skb)
5023{
5024 struct hci_sco_hdr *hdr = (void *) skb->data;
5025 struct hci_conn *conn;
5026 __u16 handle;
5027
5028 skb_pull(skb, HCI_SCO_HDR_SIZE);
5029
5030 handle = __le16_to_cpu(hdr->handle);
5031
5032 BT_DBG("%s len %d handle 0x%4.4x", hdev->name, skb->len, handle);
5033
5034 hdev->stat.sco_rx++;
5035
5036 hci_dev_lock(hdev);
5037 conn = hci_conn_hash_lookup_handle(hdev, handle);
5038 hci_dev_unlock(hdev);
5039
5040 if (conn) {
5041 /* Send to upper protocol */
5042 sco_recv_scodata(conn, skb);
5043 return;
5044 } else {
5045 BT_ERR("%s SCO packet for unknown connection handle %d",
5046 hdev->name, handle);
5047 }
5048
5049 kfree_skb(skb);
5050}
5051
5052static bool hci_req_is_complete(struct hci_dev *hdev)
5053{
5054 struct sk_buff *skb;
5055
5056 skb = skb_peek(&hdev->cmd_q);
5057 if (!skb)
5058 return true;
5059
5060 return bt_cb(skb)->req.start;
5061}
5062
5063static void hci_resend_last(struct hci_dev *hdev)
5064{
5065 struct hci_command_hdr *sent;
5066 struct sk_buff *skb;
5067 u16 opcode;
5068
5069 if (!hdev->sent_cmd)
5070 return;
5071
5072 sent = (void *) hdev->sent_cmd->data;
5073 opcode = __le16_to_cpu(sent->opcode);
5074 if (opcode == HCI_OP_RESET)
5075 return;
5076
5077 skb = skb_clone(hdev->sent_cmd, GFP_KERNEL);
5078 if (!skb)
5079 return;
5080
5081 skb_queue_head(&hdev->cmd_q, skb);
5082 queue_work(hdev->workqueue, &hdev->cmd_work);
5083}
5084
5085void hci_req_cmd_complete(struct hci_dev *hdev, u16 opcode, u8 status)
5086{
5087 hci_req_complete_t req_complete = NULL;
5088 struct sk_buff *skb;
5089 unsigned long flags;
5090
5091 BT_DBG("opcode 0x%04x status 0x%02x", opcode, status);
5092
5093 /* If the completed command doesn't match the last one that was
5094 * sent we need to do special handling of it.
5095 */
5096 if (!hci_sent_cmd_data(hdev, opcode)) {
5097 /* Some CSR based controllers generate a spontaneous
5098 * reset complete event during init and any pending
5099 * command will never be completed. In such a case we
5100 * need to resend whatever was the last sent
5101 * command.
5102 */
5103 if (test_bit(HCI_INIT, &hdev->flags) && opcode == HCI_OP_RESET)
5104 hci_resend_last(hdev);
5105
5106 return;
5107 }
5108
5109 /* If the command succeeded and there's still more commands in
5110 * this request the request is not yet complete.
5111 */
5112 if (!status && !hci_req_is_complete(hdev))
5113 return;
5114
5115 /* If this was the last command in a request the complete
5116 * callback would be found in hdev->sent_cmd instead of the
5117 * command queue (hdev->cmd_q).
5118 */
5119 if (hdev->sent_cmd) {
5120 req_complete = bt_cb(hdev->sent_cmd)->req.complete;
5121
5122 if (req_complete) {
5123 /* We must set the complete callback to NULL to
5124 * avoid calling the callback more than once if
5125 * this function gets called again.
5126 */
5127 bt_cb(hdev->sent_cmd)->req.complete = NULL;
5128
5129 goto call_complete;
5130 }
5131 }
5132
5133 /* Remove all pending commands belonging to this request */
5134 spin_lock_irqsave(&hdev->cmd_q.lock, flags);
5135 while ((skb = __skb_dequeue(&hdev->cmd_q))) {
5136 if (bt_cb(skb)->req.start) {
5137 __skb_queue_head(&hdev->cmd_q, skb);
5138 break;
5139 }
5140
5141 req_complete = bt_cb(skb)->req.complete;
5142 kfree_skb(skb);
5143 }
5144 spin_unlock_irqrestore(&hdev->cmd_q.lock, flags);
5145
5146call_complete:
5147 if (req_complete)
5148 req_complete(hdev, status);
5149}
5150
5151static void hci_rx_work(struct work_struct *work)
5152{
5153 struct hci_dev *hdev = container_of(work, struct hci_dev, rx_work);
5154 struct sk_buff *skb;
5155
5156 BT_DBG("%s", hdev->name);
5157
5158 while ((skb = skb_dequeue(&hdev->rx_q))) {
5159 /* Send copy to monitor */
5160 hci_send_to_monitor(hdev, skb);
5161
5162 if (atomic_read(&hdev->promisc)) {
5163 /* Send copy to the sockets */
5164 hci_send_to_sock(hdev, skb);
5165 }
5166
5167 if (test_bit(HCI_RAW, &hdev->flags) ||
5168 test_bit(HCI_USER_CHANNEL, &hdev->dev_flags)) {
5169 kfree_skb(skb);
5170 continue;
5171 }
5172
5173 if (test_bit(HCI_INIT, &hdev->flags)) {
5174 /* Don't process data packets in this states. */
5175 switch (bt_cb(skb)->pkt_type) {
5176 case HCI_ACLDATA_PKT:
5177 case HCI_SCODATA_PKT:
5178 kfree_skb(skb);
5179 continue;
5180 }
5181 }
5182
5183 /* Process frame */
5184 switch (bt_cb(skb)->pkt_type) {
5185 case HCI_EVENT_PKT:
5186 BT_DBG("%s Event packet", hdev->name);
5187 hci_event_packet(hdev, skb);
5188 break;
5189
5190 case HCI_ACLDATA_PKT:
5191 BT_DBG("%s ACL data packet", hdev->name);
5192 hci_acldata_packet(hdev, skb);
5193 break;
5194
5195 case HCI_SCODATA_PKT:
5196 BT_DBG("%s SCO data packet", hdev->name);
5197 hci_scodata_packet(hdev, skb);
5198 break;
5199
5200 default:
5201 kfree_skb(skb);
5202 break;
5203 }
5204 }
5205}
5206
5207static void hci_cmd_work(struct work_struct *work)
5208{
5209 struct hci_dev *hdev = container_of(work, struct hci_dev, cmd_work);
5210 struct sk_buff *skb;
5211
5212 BT_DBG("%s cmd_cnt %d cmd queued %d", hdev->name,
5213 atomic_read(&hdev->cmd_cnt), skb_queue_len(&hdev->cmd_q));
5214
5215 /* Send queued commands */
5216 if (atomic_read(&hdev->cmd_cnt)) {
5217 skb = skb_dequeue(&hdev->cmd_q);
5218 if (!skb)
5219 return;
5220
5221 kfree_skb(hdev->sent_cmd);
5222
5223 hdev->sent_cmd = skb_clone(skb, GFP_KERNEL);
5224 if (hdev->sent_cmd) {
5225 atomic_dec(&hdev->cmd_cnt);
5226 hci_send_frame(hdev, skb);
5227 if (test_bit(HCI_RESET, &hdev->flags))
5228 del_timer(&hdev->cmd_timer);
5229 else
5230 mod_timer(&hdev->cmd_timer,
5231 jiffies + HCI_CMD_TIMEOUT);
5232 } else {
5233 skb_queue_head(&hdev->cmd_q, skb);
5234 queue_work(hdev->workqueue, &hdev->cmd_work);
5235 }
5236 }
5237}
5238
5239void hci_req_add_le_scan_disable(struct hci_request *req)
5240{
5241 struct hci_cp_le_set_scan_enable cp;
5242
5243 memset(&cp, 0, sizeof(cp));
5244 cp.enable = LE_SCAN_DISABLE;
5245 hci_req_add(req, HCI_OP_LE_SET_SCAN_ENABLE, sizeof(cp), &cp);
5246}
5247
5248void hci_req_add_le_passive_scan(struct hci_request *req)
5249{
5250 struct hci_cp_le_set_scan_param param_cp;
5251 struct hci_cp_le_set_scan_enable enable_cp;
5252 struct hci_dev *hdev = req->hdev;
5253 u8 own_addr_type;
5254
5255 /* Set require_privacy to true to avoid identification from
5256 * unknown peer devices. Since this is passive scanning, no
5257 * SCAN_REQ using the local identity should be sent. Mandating
5258 * privacy is just an extra precaution.
5259 */
5260 if (hci_update_random_address(req, true, &own_addr_type))
5261 return;
5262
5263 memset(¶m_cp, 0, sizeof(param_cp));
5264 param_cp.type = LE_SCAN_PASSIVE;
5265 param_cp.interval = cpu_to_le16(hdev->le_scan_interval);
5266 param_cp.window = cpu_to_le16(hdev->le_scan_window);
5267 param_cp.own_address_type = own_addr_type;
5268 hci_req_add(req, HCI_OP_LE_SET_SCAN_PARAM, sizeof(param_cp),
5269 ¶m_cp);
5270
5271 memset(&enable_cp, 0, sizeof(enable_cp));
5272 enable_cp.enable = LE_SCAN_ENABLE;
5273 enable_cp.filter_dup = LE_SCAN_FILTER_DUP_ENABLE;
5274 hci_req_add(req, HCI_OP_LE_SET_SCAN_ENABLE, sizeof(enable_cp),
5275 &enable_cp);
5276}
5277
5278static void update_background_scan_complete(struct hci_dev *hdev, u8 status)
5279{
5280 if (status)
5281 BT_DBG("HCI request failed to update background scanning: "
5282 "status 0x%2.2x", status);
5283}
5284
5285/* This function controls the background scanning based on hdev->pend_le_conns
5286 * list. If there are pending LE connection we start the background scanning,
5287 * otherwise we stop it.
5288 *
5289 * This function requires the caller holds hdev->lock.
5290 */
5291void hci_update_background_scan(struct hci_dev *hdev)
5292{
5293 struct hci_request req;
5294 struct hci_conn *conn;
5295 int err;
5296
5297 hci_req_init(&req, hdev);
5298
5299 if (list_empty(&hdev->pend_le_conns)) {
5300 /* If there is no pending LE connections, we should stop
5301 * the background scanning.
5302 */
5303
5304 /* If controller is not scanning we are done. */
5305 if (!test_bit(HCI_LE_SCAN, &hdev->dev_flags))
5306 return;
5307
5308 hci_req_add_le_scan_disable(&req);
5309
5310 BT_DBG("%s stopping background scanning", hdev->name);
5311 } else {
5312 /* If there is at least one pending LE connection, we should
5313 * keep the background scan running.
5314 */
5315
5316 /* If controller is connecting, we should not start scanning
5317 * since some controllers are not able to scan and connect at
5318 * the same time.
5319 */
5320 conn = hci_conn_hash_lookup_state(hdev, LE_LINK, BT_CONNECT);
5321 if (conn)
5322 return;
5323
5324 /* If controller is currently scanning, we stop it to ensure we
5325 * don't miss any advertising (due to duplicates filter).
5326 */
5327 if (test_bit(HCI_LE_SCAN, &hdev->dev_flags))
5328 hci_req_add_le_scan_disable(&req);
5329
5330 hci_req_add_le_passive_scan(&req);
5331
5332 BT_DBG("%s starting background scanning", hdev->name);
5333 }
5334
5335 err = hci_req_run(&req, update_background_scan_complete);
5336 if (err)
5337 BT_ERR("Failed to run HCI request: err %d", err);
5338}