?  search:
summary | log | graphiclog1 | graphiclog2 | commit | commitdiff | tree | refs | edit | fork
blame | history | raw | HEAD
MIPS: BCM63XX: Add register and IRQ definitions for USB 2.0 device
[linux-2.6/btrfs-unstable.git] / net / bluetooth / hci_core.c
blobd4de5db18d5a8e48d950a368e7ef93840d269a07
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
31 #include <linux/rfkill.h>
32
33 #include <net/bluetooth/bluetooth.h>
34 #include <net/bluetooth/hci_core.h>
35
36 static void hci_rx_work(struct work_struct *work);
37 static void hci_cmd_work(struct work_struct *work);
38 static void hci_tx_work(struct work_struct *work);
39
40 /* HCI device list */
41 LIST_HEAD(hci_dev_list);
42 DEFINE_RWLOCK(hci_dev_list_lock);
43
44 /* HCI callback list */
45 LIST_HEAD(hci_cb_list);
46 DEFINE_RWLOCK(hci_cb_list_lock);
47
48 /* HCI ID Numbering */
49 static DEFINE_IDA(hci_index_ida);
50
51 /* ---- HCI notifications ---- */
52
53 static void hci_notify(struct hci_dev *hdev, int event)
54 {
55 hci_sock_dev_event(hdev, event);
56 }
57
58 /* ---- HCI requests ---- */
59
60 void hci_req_complete(struct hci_dev *hdev, __u16 cmd, int result)
61 {
62 BT_DBG("%s command 0x%4.4x result 0x%2.2x", hdev->name, cmd, result);
63
64 /* If this is the init phase check if the completed command matches
65 * the last init command, and if not just return.
66 */
67 if (test_bit(HCI_INIT, &hdev->flags) && hdev->init_last_cmd != cmd) {
68 struct hci_command_hdr *sent = (void *) hdev->sent_cmd->data;
69 u16 opcode = __le16_to_cpu(sent->opcode);
70 struct sk_buff *skb;
71
72 /* Some CSR based controllers generate a spontaneous
73 * reset complete event during init and any pending
74 * command will never be completed. In such a case we
75 * need to resend whatever was the last sent
76 * command.
77 */
78
79 if (cmd != HCI_OP_RESET || opcode == HCI_OP_RESET)
80 return;
81
82 skb = skb_clone(hdev->sent_cmd, GFP_ATOMIC);
83 if (skb) {
84 skb_queue_head(&hdev->cmd_q, skb);
85 queue_work(hdev->workqueue, &hdev->cmd_work);
86 }
87
88 return;
89 }
90
91 if (hdev->req_status == HCI_REQ_PEND) {
92 hdev->req_result = result;
93 hdev->req_status = HCI_REQ_DONE;
94 wake_up_interruptible(&hdev->req_wait_q);
95 }
96 }
97
98 static void hci_req_cancel(struct hci_dev *hdev, int err)
99 {
100 BT_DBG("%s err 0x%2.2x", hdev->name, err);
101
102 if (hdev->req_status == HCI_REQ_PEND) {
103 hdev->req_result = err;
104 hdev->req_status = HCI_REQ_CANCELED;
105 wake_up_interruptible(&hdev->req_wait_q);
106 }
107 }
108
109 /* Execute request and wait for completion. */
110 static int __hci_request(struct hci_dev *hdev,
111 void (*req)(struct hci_dev *hdev, unsigned long opt),
112 unsigned long opt, __u32 timeout)
113 {
114 DECLARE_WAITQUEUE(wait, current);
115 int err = 0;
116
117 BT_DBG("%s start", hdev->name);
118
119 hdev->req_status = HCI_REQ_PEND;
120
121 add_wait_queue(&hdev->req_wait_q, &wait);
122 set_current_state(TASK_INTERRUPTIBLE);
123
124 req(hdev, opt);
125 schedule_timeout(timeout);
126
127 remove_wait_queue(&hdev->req_wait_q, &wait);
128
129 if (signal_pending(current))
130 return -EINTR;
131
132 switch (hdev->req_status) {
133 case HCI_REQ_DONE:
134 err = -bt_to_errno(hdev->req_result);
135 break;
136
137 case HCI_REQ_CANCELED:
138 err = -hdev->req_result;
139 break;
140
141 default:
142 err = -ETIMEDOUT;
143 break;
144 }
145
146 hdev->req_status = hdev->req_result = 0;
147
148 BT_DBG("%s end: err %d", hdev->name, err);
149
150 return err;
151 }
152
153 static int hci_request(struct hci_dev *hdev,
154 void (*req)(struct hci_dev *hdev, unsigned long opt),
155 unsigned long opt, __u32 timeout)
156 {
157 int ret;
158
159 if (!test_bit(HCI_UP, &hdev->flags))
160 return -ENETDOWN;
161
162 /* Serialize all requests */
163 hci_req_lock(hdev);
164 ret = __hci_request(hdev, req, opt, timeout);
165 hci_req_unlock(hdev);
166
167 return ret;
168 }
169
170 static void hci_reset_req(struct hci_dev *hdev, unsigned long opt)
171 {
172 BT_DBG("%s %ld", hdev->name, opt);
173
174 /* Reset device */
175 set_bit(HCI_RESET, &hdev->flags);
176 hci_send_cmd(hdev, HCI_OP_RESET, 0, NULL);
177 }
178
179 static void bredr_init(struct hci_dev *hdev)
180 {
181 struct hci_cp_delete_stored_link_key cp;
182 __le16 param;
183 __u8 flt_type;
184
185 hdev->flow_ctl_mode = HCI_FLOW_CTL_MODE_PACKET_BASED;
186
187 /* Mandatory initialization */
188
189 /* Read Local Supported Features */
190 hci_send_cmd(hdev, HCI_OP_READ_LOCAL_FEATURES, 0, NULL);
191
192 /* Read Local Version */
193 hci_send_cmd(hdev, HCI_OP_READ_LOCAL_VERSION, 0, NULL);
194
195 /* Read Buffer Size (ACL mtu, max pkt, etc.) */
196 hci_send_cmd(hdev, HCI_OP_READ_BUFFER_SIZE, 0, NULL);
197
198 /* Read BD Address */
199 hci_send_cmd(hdev, HCI_OP_READ_BD_ADDR, 0, NULL);
200
201 /* Read Class of Device */
202 hci_send_cmd(hdev, HCI_OP_READ_CLASS_OF_DEV, 0, NULL);
203
204 /* Read Local Name */
205 hci_send_cmd(hdev, HCI_OP_READ_LOCAL_NAME, 0, NULL);
206
207 /* Read Voice Setting */
208 hci_send_cmd(hdev, HCI_OP_READ_VOICE_SETTING, 0, NULL);
209
210 /* Optional initialization */
211
212 /* Clear Event Filters */
213 flt_type = HCI_FLT_CLEAR_ALL;
214 hci_send_cmd(hdev, HCI_OP_SET_EVENT_FLT, 1, &flt_type);
215
216 /* Connection accept timeout ~20 secs */
217 param = __constant_cpu_to_le16(0x7d00);
218 hci_send_cmd(hdev, HCI_OP_WRITE_CA_TIMEOUT, 2, &param);
219
220 bacpy(&cp.bdaddr, BDADDR_ANY);
221 cp.delete_all = 1;
222 hci_send_cmd(hdev, HCI_OP_DELETE_STORED_LINK_KEY, sizeof(cp), &cp);
223 }
224
225 static void amp_init(struct hci_dev *hdev)
226 {
227 hdev->flow_ctl_mode = HCI_FLOW_CTL_MODE_BLOCK_BASED;
228
229 /* Read Local Version */
230 hci_send_cmd(hdev, HCI_OP_READ_LOCAL_VERSION, 0, NULL);
231
232 /* Read Local AMP Info */
233 hci_send_cmd(hdev, HCI_OP_READ_LOCAL_AMP_INFO, 0, NULL);
234 }
235
236 static void hci_init_req(struct hci_dev *hdev, unsigned long opt)
237 {
238 struct sk_buff *skb;
239
240 BT_DBG("%s %ld", hdev->name, opt);
241
242 /* Driver initialization */
243
244 /* Special commands */
245 while ((skb = skb_dequeue(&hdev->driver_init))) {
246 bt_cb(skb)->pkt_type = HCI_COMMAND_PKT;
247 skb->dev = (void *) hdev;
248
249 skb_queue_tail(&hdev->cmd_q, skb);
250 queue_work(hdev->workqueue, &hdev->cmd_work);
251 }
252 skb_queue_purge(&hdev->driver_init);
253
254 /* Reset */
255 if (!test_bit(HCI_QUIRK_RESET_ON_CLOSE, &hdev->quirks))
256 hci_reset_req(hdev, 0);
257
258 switch (hdev->dev_type) {
259 case HCI_BREDR:
260 bredr_init(hdev);
261 break;
262
263 case HCI_AMP:
264 amp_init(hdev);
265 break;
266
267 default:
268 BT_ERR("Unknown device type %d", hdev->dev_type);
269 break;
270 }
271
272 }
273
274 static void hci_le_init_req(struct hci_dev *hdev, unsigned long opt)
275 {
276 BT_DBG("%s", hdev->name);
277
278 /* Read LE buffer size */
279 hci_send_cmd(hdev, HCI_OP_LE_READ_BUFFER_SIZE, 0, NULL);
280 }
281
282 static void hci_scan_req(struct hci_dev *hdev, unsigned long opt)
283 {
284 __u8 scan = opt;
285
286 BT_DBG("%s %x", hdev->name, scan);
287
288 /* Inquiry and Page scans */
289 hci_send_cmd(hdev, HCI_OP_WRITE_SCAN_ENABLE, 1, &scan);
290 }
291
292 static void hci_auth_req(struct hci_dev *hdev, unsigned long opt)
293 {
294 __u8 auth = opt;
295
296 BT_DBG("%s %x", hdev->name, auth);
297
298 /* Authentication */
299 hci_send_cmd(hdev, HCI_OP_WRITE_AUTH_ENABLE, 1, &auth);
300 }
301
302 static void hci_encrypt_req(struct hci_dev *hdev, unsigned long opt)
303 {
304 __u8 encrypt = opt;
305
306 BT_DBG("%s %x", hdev->name, encrypt);
307
308 /* Encryption */
309 hci_send_cmd(hdev, HCI_OP_WRITE_ENCRYPT_MODE, 1, &encrypt);
310 }
311
312 static void hci_linkpol_req(struct hci_dev *hdev, unsigned long opt)
313 {
314 __le16 policy = cpu_to_le16(opt);
315
316 BT_DBG("%s %x", hdev->name, policy);
317
318 /* Default link policy */
319 hci_send_cmd(hdev, HCI_OP_WRITE_DEF_LINK_POLICY, 2, &policy);
320 }
321
322 /* Get HCI device by index.
323 * Device is held on return. */
324 struct hci_dev *hci_dev_get(int index)
325 {
326 struct hci_dev *hdev = NULL, *d;
327
328 BT_DBG("%d", index);
329
330 if (index < 0)
331 return NULL;
332
333 read_lock(&hci_dev_list_lock);
334 list_for_each_entry(d, &hci_dev_list, list) {
335 if (d->id == index) {
336 hdev = hci_dev_hold(d);
337 break;
338 }
339 }
340 read_unlock(&hci_dev_list_lock);
341 return hdev;
342 }
343
344 /* ---- Inquiry support ---- */
345
346 bool hci_discovery_active(struct hci_dev *hdev)
347 {
348 struct discovery_state *discov = &hdev->discovery;
349
350 switch (discov->state) {
351 case DISCOVERY_FINDING:
352 case DISCOVERY_RESOLVING:
353 return true;
354
355 default:
356 return false;
357 }
358 }
359
360 void hci_discovery_set_state(struct hci_dev *hdev, int state)
361 {
362 BT_DBG("%s state %u -> %u", hdev->name, hdev->discovery.state, state);
363
364 if (hdev->discovery.state == state)
365 return;
366
367 switch (state) {
368 case DISCOVERY_STOPPED:
369 if (hdev->discovery.state != DISCOVERY_STARTING)
370 mgmt_discovering(hdev, 0);
371 break;
372 case DISCOVERY_STARTING:
373 break;
374 case DISCOVERY_FINDING:
375 mgmt_discovering(hdev, 1);
376 break;
377 case DISCOVERY_RESOLVING:
378 break;
379 case DISCOVERY_STOPPING:
380 break;
381 }
382
383 hdev->discovery.state = state;
384 }
385
386 static void inquiry_cache_flush(struct hci_dev *hdev)
387 {
388 struct discovery_state *cache = &hdev->discovery;
389 struct inquiry_entry *p, *n;
390
391 list_for_each_entry_safe(p, n, &cache->all, all) {
392 list_del(&p->all);
393 kfree(p);
394 }
395
396 INIT_LIST_HEAD(&cache->unknown);
397 INIT_LIST_HEAD(&cache->resolve);
398 }
399
400 struct inquiry_entry *hci_inquiry_cache_lookup(struct hci_dev *hdev,
401 bdaddr_t *bdaddr)
402 {
403 struct discovery_state *cache = &hdev->discovery;
404 struct inquiry_entry *e;
405
406 BT_DBG("cache %p, %s", cache, batostr(bdaddr));
407
408 list_for_each_entry(e, &cache->all, all) {
409 if (!bacmp(&e->data.bdaddr, bdaddr))
410 return e;
411 }
412
413 return NULL;
414 }
415
416 struct inquiry_entry *hci_inquiry_cache_lookup_unknown(struct hci_dev *hdev,
417 bdaddr_t *bdaddr)
418 {
419 struct discovery_state *cache = &hdev->discovery;
420 struct inquiry_entry *e;
421
422 BT_DBG("cache %p, %s", cache, batostr(bdaddr));
423
424 list_for_each_entry(e, &cache->unknown, list) {
425 if (!bacmp(&e->data.bdaddr, bdaddr))
426 return e;
427 }
428
429 return NULL;
430 }
431
432 struct inquiry_entry *hci_inquiry_cache_lookup_resolve(struct hci_dev *hdev,
433 bdaddr_t *bdaddr,
434 int state)
435 {
436 struct discovery_state *cache = &hdev->discovery;
437 struct inquiry_entry *e;
438
439 BT_DBG("cache %p bdaddr %s state %d", cache, batostr(bdaddr), state);
440
441 list_for_each_entry(e, &cache->resolve, list) {
442 if (!bacmp(bdaddr, BDADDR_ANY) && e->name_state == state)
443 return e;
444 if (!bacmp(&e->data.bdaddr, bdaddr))
445 return e;
446 }
447
448 return NULL;
449 }
450
451 void hci_inquiry_cache_update_resolve(struct hci_dev *hdev,
452 struct inquiry_entry *ie)
453 {
454 struct discovery_state *cache = &hdev->discovery;
455 struct list_head *pos = &cache->resolve;
456 struct inquiry_entry *p;
457
458 list_del(&ie->list);
459
460 list_for_each_entry(p, &cache->resolve, list) {
461 if (p->name_state != NAME_PENDING &&
462 abs(p->data.rssi) >= abs(ie->data.rssi))
463 break;
464 pos = &p->list;
465 }
466
467 list_add(&ie->list, pos);
468 }
469
470 bool hci_inquiry_cache_update(struct hci_dev *hdev, struct inquiry_data *data,
471 bool name_known, bool *ssp)
472 {
473 struct discovery_state *cache = &hdev->discovery;
474 struct inquiry_entry *ie;
475
476 BT_DBG("cache %p, %s", cache, batostr(&data->bdaddr));
477
478 if (ssp)
479 *ssp = data->ssp_mode;
480
481 ie = hci_inquiry_cache_lookup(hdev, &data->bdaddr);
482 if (ie) {
483 if (ie->data.ssp_mode && ssp)
484 *ssp = true;
485
486 if (ie->name_state == NAME_NEEDED &&
487 data->rssi != ie->data.rssi) {
488 ie->data.rssi = data->rssi;
489 hci_inquiry_cache_update_resolve(hdev, ie);
490 }
491
492 goto update;
493 }
494
495 /* Entry not in the cache. Add new one. */
496 ie = kzalloc(sizeof(struct inquiry_entry), GFP_ATOMIC);
497 if (!ie)
498 return false;
499
500 list_add(&ie->all, &cache->all);
501
502 if (name_known) {
503 ie->name_state = NAME_KNOWN;
504 } else {
505 ie->name_state = NAME_NOT_KNOWN;
506 list_add(&ie->list, &cache->unknown);
507 }
508
509 update:
510 if (name_known && ie->name_state != NAME_KNOWN &&
511 ie->name_state != NAME_PENDING) {
512 ie->name_state = NAME_KNOWN;
513 list_del(&ie->list);
514 }
515
516 memcpy(&ie->data, data, sizeof(*data));
517 ie->timestamp = jiffies;
518 cache->timestamp = jiffies;
519
520 if (ie->name_state == NAME_NOT_KNOWN)
521 return false;
522
523 return true;
524 }
525
526 static int inquiry_cache_dump(struct hci_dev *hdev, int num, __u8 *buf)
527 {
528 struct discovery_state *cache = &hdev->discovery;
529 struct inquiry_info *info = (struct inquiry_info *) buf;
530 struct inquiry_entry *e;
531 int copied = 0;
532
533 list_for_each_entry(e, &cache->all, all) {
534 struct inquiry_data *data = &e->data;
535
536 if (copied >= num)
537 break;
538
539 bacpy(&info->bdaddr, &data->bdaddr);
540 info->pscan_rep_mode = data->pscan_rep_mode;
541 info->pscan_period_mode = data->pscan_period_mode;
542 info->pscan_mode = data->pscan_mode;
543 memcpy(info->dev_class, data->dev_class, 3);
544 info->clock_offset = data->clock_offset;
545
546 info++;
547 copied++;
548 }
549
550 BT_DBG("cache %p, copied %d", cache, copied);
551 return copied;
552 }
553
554 static void hci_inq_req(struct hci_dev *hdev, unsigned long opt)
555 {
556 struct hci_inquiry_req *ir = (struct hci_inquiry_req *) opt;
557 struct hci_cp_inquiry cp;
558
559 BT_DBG("%s", hdev->name);
560
561 if (test_bit(HCI_INQUIRY, &hdev->flags))
562 return;
563
564 /* Start Inquiry */
565 memcpy(&cp.lap, &ir->lap, 3);
566 cp.length = ir->length;
567 cp.num_rsp = ir->num_rsp;
568 hci_send_cmd(hdev, HCI_OP_INQUIRY, sizeof(cp), &cp);
569 }
570
571 int hci_inquiry(void __user *arg)
572 {
573 __u8 __user *ptr = arg;
574 struct hci_inquiry_req ir;
575 struct hci_dev *hdev;
576 int err = 0, do_inquiry = 0, max_rsp;
577 long timeo;
578 __u8 *buf;
579
580 if (copy_from_user(&ir, ptr, sizeof(ir)))
581 return -EFAULT;
582
583 hdev = hci_dev_get(ir.dev_id);
584 if (!hdev)
585 return -ENODEV;
586
587 hci_dev_lock(hdev);
588 if (inquiry_cache_age(hdev) > INQUIRY_CACHE_AGE_MAX ||
589 inquiry_cache_empty(hdev) || ir.flags & IREQ_CACHE_FLUSH) {
590 inquiry_cache_flush(hdev);
591 do_inquiry = 1;
592 }
593 hci_dev_unlock(hdev);
594
595 timeo = ir.length * msecs_to_jiffies(2000);
596
597 if (do_inquiry) {
598 err = hci_request(hdev, hci_inq_req, (unsigned long)&ir, timeo);
599 if (err < 0)
600 goto done;
601 }
602
603 /* for unlimited number of responses we will use buffer with
604 * 255 entries
605 */
606 max_rsp = (ir.num_rsp == 0) ? 255 : ir.num_rsp;
607
608 /* cache_dump can't sleep. Therefore we allocate temp buffer and then
609 * copy it to the user space.
610 */
611 buf = kmalloc(sizeof(struct inquiry_info) * max_rsp, GFP_KERNEL);
612 if (!buf) {
613 err = -ENOMEM;
614 goto done;
615 }
616
617 hci_dev_lock(hdev);
618 ir.num_rsp = inquiry_cache_dump(hdev, max_rsp, buf);
619 hci_dev_unlock(hdev);
620
621 BT_DBG("num_rsp %d", ir.num_rsp);
622
623 if (!copy_to_user(ptr, &ir, sizeof(ir))) {
624 ptr += sizeof(ir);
625 if (copy_to_user(ptr, buf, sizeof(struct inquiry_info) *
626 ir.num_rsp))
627 err = -EFAULT;
628 } else
629 err = -EFAULT;
630
631 kfree(buf);
632
633 done:
634 hci_dev_put(hdev);
635 return err;
636 }
637
638 /* ---- HCI ioctl helpers ---- */
639
640 int hci_dev_open(__u16 dev)
641 {
642 struct hci_dev *hdev;
643 int ret = 0;
644
645 hdev = hci_dev_get(dev);
646 if (!hdev)
647 return -ENODEV;
648
649 BT_DBG("%s %p", hdev->name, hdev);
650
651 hci_req_lock(hdev);
652
653 if (test_bit(HCI_UNREGISTER, &hdev->dev_flags)) {
654 ret = -ENODEV;
655 goto done;
656 }
657
658 if (hdev->rfkill && rfkill_blocked(hdev->rfkill)) {
659 ret = -ERFKILL;
660 goto done;
661 }
662
663 if (test_bit(HCI_UP, &hdev->flags)) {
664 ret = -EALREADY;
665 goto done;
666 }
667
668 if (test_bit(HCI_QUIRK_RAW_DEVICE, &hdev->quirks))
669 set_bit(HCI_RAW, &hdev->flags);
670
671 /* Treat all non BR/EDR controllers as raw devices if
672 enable_hs is not set */
673 if (hdev->dev_type != HCI_BREDR && !enable_hs)
674 set_bit(HCI_RAW, &hdev->flags);
675
676 if (hdev->open(hdev)) {
677 ret = -EIO;
678 goto done;
679 }
680
681 if (!test_bit(HCI_RAW, &hdev->flags)) {
682 atomic_set(&hdev->cmd_cnt, 1);
683 set_bit(HCI_INIT, &hdev->flags);
684 hdev->init_last_cmd = 0;
685
686 ret = __hci_request(hdev, hci_init_req, 0, HCI_INIT_TIMEOUT);
687
688 if (lmp_host_le_capable(hdev))
689 ret = __hci_request(hdev, hci_le_init_req, 0,
690 HCI_INIT_TIMEOUT);
691
692 clear_bit(HCI_INIT, &hdev->flags);
693 }
694
695 if (!ret) {
696 hci_dev_hold(hdev);
697 set_bit(HCI_UP, &hdev->flags);
698 hci_notify(hdev, HCI_DEV_UP);
699 if (!test_bit(HCI_SETUP, &hdev->dev_flags)) {
700 hci_dev_lock(hdev);
701 mgmt_powered(hdev, 1);
702 hci_dev_unlock(hdev);
703 }
704 } else {
705 /* Init failed, cleanup */
706 flush_work(&hdev->tx_work);
707 flush_work(&hdev->cmd_work);
708 flush_work(&hdev->rx_work);
709
710 skb_queue_purge(&hdev->cmd_q);
711 skb_queue_purge(&hdev->rx_q);
712
713 if (hdev->flush)
714 hdev->flush(hdev);
715
716 if (hdev->sent_cmd) {
717 kfree_skb(hdev->sent_cmd);
718 hdev->sent_cmd = NULL;
719 }
720
721 hdev->close(hdev);
722 hdev->flags = 0;
723 }
724
725 done:
726 hci_req_unlock(hdev);
727 hci_dev_put(hdev);
728 return ret;
729 }
730
731 static int hci_dev_do_close(struct hci_dev *hdev)
732 {
733 BT_DBG("%s %p", hdev->name, hdev);
734
735 cancel_work_sync(&hdev->le_scan);
736
737 hci_req_cancel(hdev, ENODEV);
738 hci_req_lock(hdev);
739
740 if (!test_and_clear_bit(HCI_UP, &hdev->flags)) {
741 del_timer_sync(&hdev->cmd_timer);
742 hci_req_unlock(hdev);
743 return 0;
744 }
745
746 /* Flush RX and TX works */
747 flush_work(&hdev->tx_work);
748 flush_work(&hdev->rx_work);
749
750 if (hdev->discov_timeout > 0) {
751 cancel_delayed_work(&hdev->discov_off);
752 hdev->discov_timeout = 0;
753 clear_bit(HCI_DISCOVERABLE, &hdev->dev_flags);
754 }
755
756 if (test_and_clear_bit(HCI_SERVICE_CACHE, &hdev->dev_flags))
757 cancel_delayed_work(&hdev->service_cache);
758
759 cancel_delayed_work_sync(&hdev->le_scan_disable);
760
761 hci_dev_lock(hdev);
762 inquiry_cache_flush(hdev);
763 hci_conn_hash_flush(hdev);
764 hci_dev_unlock(hdev);
765
766 hci_notify(hdev, HCI_DEV_DOWN);
767
768 if (hdev->flush)
769 hdev->flush(hdev);
770
771 /* Reset device */
772 skb_queue_purge(&hdev->cmd_q);
773 atomic_set(&hdev->cmd_cnt, 1);
774 if (!test_bit(HCI_RAW, &hdev->flags) &&
775 test_bit(HCI_QUIRK_RESET_ON_CLOSE, &hdev->quirks)) {
776 set_bit(HCI_INIT, &hdev->flags);
777 __hci_request(hdev, hci_reset_req, 0, HCI_CMD_TIMEOUT);
778 clear_bit(HCI_INIT, &hdev->flags);
779 }
780
781 /* flush cmd work */
782 flush_work(&hdev->cmd_work);
783
784 /* Drop queues */
785 skb_queue_purge(&hdev->rx_q);
786 skb_queue_purge(&hdev->cmd_q);
787 skb_queue_purge(&hdev->raw_q);
788
789 /* Drop last sent command */
790 if (hdev->sent_cmd) {
791 del_timer_sync(&hdev->cmd_timer);
792 kfree_skb(hdev->sent_cmd);
793 hdev->sent_cmd = NULL;
794 }
795
796 /* After this point our queues are empty
797 * and no tasks are scheduled. */
798 hdev->close(hdev);
799
800 if (!test_and_clear_bit(HCI_AUTO_OFF, &hdev->dev_flags)) {
801 hci_dev_lock(hdev);
802 mgmt_powered(hdev, 0);
803 hci_dev_unlock(hdev);
804 }
805
806 /* Clear flags */
807 hdev->flags = 0;
808
809 memset(hdev->eir, 0, sizeof(hdev->eir));
810 memset(hdev->dev_class, 0, sizeof(hdev->dev_class));
811
812 hci_req_unlock(hdev);
813
814 hci_dev_put(hdev);
815 return 0;
816 }
817
818 int hci_dev_close(__u16 dev)
819 {
820 struct hci_dev *hdev;
821 int err;
822
823 hdev = hci_dev_get(dev);
824 if (!hdev)
825 return -ENODEV;
826
827 if (test_and_clear_bit(HCI_AUTO_OFF, &hdev->dev_flags))
828 cancel_delayed_work(&hdev->power_off);
829
830 err = hci_dev_do_close(hdev);
831
832 hci_dev_put(hdev);
833 return err;
834 }
835
836 int hci_dev_reset(__u16 dev)
837 {
838 struct hci_dev *hdev;
839 int ret = 0;
840
841 hdev = hci_dev_get(dev);
842 if (!hdev)
843 return -ENODEV;
844
845 hci_req_lock(hdev);
846
847 if (!test_bit(HCI_UP, &hdev->flags))
848 goto done;
849
850 /* Drop queues */
851 skb_queue_purge(&hdev->rx_q);
852 skb_queue_purge(&hdev->cmd_q);
853
854 hci_dev_lock(hdev);
855 inquiry_cache_flush(hdev);
856 hci_conn_hash_flush(hdev);
857 hci_dev_unlock(hdev);
858
859 if (hdev->flush)
860 hdev->flush(hdev);
861
862 atomic_set(&hdev->cmd_cnt, 1);
863 hdev->acl_cnt = 0; hdev->sco_cnt = 0; hdev->le_cnt = 0;
864
865 if (!test_bit(HCI_RAW, &hdev->flags))
866 ret = __hci_request(hdev, hci_reset_req, 0, HCI_INIT_TIMEOUT);
867
868 done:
869 hci_req_unlock(hdev);
870 hci_dev_put(hdev);
871 return ret;
872 }
873
874 int hci_dev_reset_stat(__u16 dev)
875 {
876 struct hci_dev *hdev;
877 int ret = 0;
878
879 hdev = hci_dev_get(dev);
880 if (!hdev)
881 return -ENODEV;
882
883 memset(&hdev->stat, 0, sizeof(struct hci_dev_stats));
884
885 hci_dev_put(hdev);
886
887 return ret;
888 }
889
890 int hci_dev_cmd(unsigned int cmd, void __user *arg)
891 {
892 struct hci_dev *hdev;
893 struct hci_dev_req dr;
894 int err = 0;
895
896 if (copy_from_user(&dr, arg, sizeof(dr)))
897 return -EFAULT;
898
899 hdev = hci_dev_get(dr.dev_id);
900 if (!hdev)
901 return -ENODEV;
902
903 switch (cmd) {
904 case HCISETAUTH:
905 err = hci_request(hdev, hci_auth_req, dr.dev_opt,
906 HCI_INIT_TIMEOUT);
907 break;
908
909 case HCISETENCRYPT:
910 if (!lmp_encrypt_capable(hdev)) {
911 err = -EOPNOTSUPP;
912 break;
913 }
914
915 if (!test_bit(HCI_AUTH, &hdev->flags)) {
916 /* Auth must be enabled first */
917 err = hci_request(hdev, hci_auth_req, dr.dev_opt,
918 HCI_INIT_TIMEOUT);
919 if (err)
920 break;
921 }
922
923 err = hci_request(hdev, hci_encrypt_req, dr.dev_opt,
924 HCI_INIT_TIMEOUT);
925 break;
926
927 case HCISETSCAN:
928 err = hci_request(hdev, hci_scan_req, dr.dev_opt,
929 HCI_INIT_TIMEOUT);
930 break;
931
932 case HCISETLINKPOL:
933 err = hci_request(hdev, hci_linkpol_req, dr.dev_opt,
934 HCI_INIT_TIMEOUT);
935 break;
936
937 case HCISETLINKMODE:
938 hdev->link_mode = ((__u16) dr.dev_opt) &
939 (HCI_LM_MASTER | HCI_LM_ACCEPT);
940 break;
941
942 case HCISETPTYPE:
943 hdev->pkt_type = (__u16) dr.dev_opt;
944 break;
945
946 case HCISETACLMTU:
947 hdev->acl_mtu = *((__u16 *) &dr.dev_opt + 1);
948 hdev->acl_pkts = *((__u16 *) &dr.dev_opt + 0);
949 break;
950
951 case HCISETSCOMTU:
952 hdev->sco_mtu = *((__u16 *) &dr.dev_opt + 1);
953 hdev->sco_pkts = *((__u16 *) &dr.dev_opt + 0);
954 break;
955
956 default:
957 err = -EINVAL;
958 break;
959 }
960
961 hci_dev_put(hdev);
962 return err;
963 }
964
965 int hci_get_dev_list(void __user *arg)
966 {
967 struct hci_dev *hdev;
968 struct hci_dev_list_req *dl;
969 struct hci_dev_req *dr;
970 int n = 0, size, err;
971 __u16 dev_num;
972
973 if (get_user(dev_num, (__u16 __user *) arg))
974 return -EFAULT;
975
976 if (!dev_num || dev_num > (PAGE_SIZE * 2) / sizeof(*dr))
977 return -EINVAL;
978
979 size = sizeof(*dl) + dev_num * sizeof(*dr);
980
981 dl = kzalloc(size, GFP_KERNEL);
982 if (!dl)
983 return -ENOMEM;
984
985 dr = dl->dev_req;
986
987 read_lock(&hci_dev_list_lock);
988 list_for_each_entry(hdev, &hci_dev_list, list) {
989 if (test_and_clear_bit(HCI_AUTO_OFF, &hdev->dev_flags))
990 cancel_delayed_work(&hdev->power_off);
991
992 if (!test_bit(HCI_MGMT, &hdev->dev_flags))
993 set_bit(HCI_PAIRABLE, &hdev->dev_flags);
994
995 (dr + n)->dev_id = hdev->id;
996 (dr + n)->dev_opt = hdev->flags;
997
998 if (++n >= dev_num)
999 break;
1000 }
1001 read_unlock(&hci_dev_list_lock);
1002
1003 dl->dev_num = n;
1004 size = sizeof(*dl) + n * sizeof(*dr);
1005
1006 err = copy_to_user(arg, dl, size);
1007 kfree(dl);
1008
1009 return err ? -EFAULT : 0;
1010 }
1011
1012 int hci_get_dev_info(void __user *arg)
1013 {
1014 struct hci_dev *hdev;
1015 struct hci_dev_info di;
1016 int err = 0;
1017
1018 if (copy_from_user(&di, arg, sizeof(di)))
1019 return -EFAULT;
1020
1021 hdev = hci_dev_get(di.dev_id);
1022 if (!hdev)
1023 return -ENODEV;
1024
1025 if (test_and_clear_bit(HCI_AUTO_OFF, &hdev->dev_flags))
1026 cancel_delayed_work_sync(&hdev->power_off);
1027
1028 if (!test_bit(HCI_MGMT, &hdev->dev_flags))
1029 set_bit(HCI_PAIRABLE, &hdev->dev_flags);
1030
1031 strcpy(di.name, hdev->name);
1032 di.bdaddr = hdev->bdaddr;
1033 di.type = (hdev->bus & 0x0f) | (hdev->dev_type << 4);
1034 di.flags = hdev->flags;
1035 di.pkt_type = hdev->pkt_type;
1036 di.acl_mtu = hdev->acl_mtu;
1037 di.acl_pkts = hdev->acl_pkts;
1038 di.sco_mtu = hdev->sco_mtu;
1039 di.sco_pkts = hdev->sco_pkts;
1040 di.link_policy = hdev->link_policy;
1041 di.link_mode = hdev->link_mode;
1042
1043 memcpy(&di.stat, &hdev->stat, sizeof(di.stat));
1044 memcpy(&di.features, &hdev->features, sizeof(di.features));
1045
1046 if (copy_to_user(arg, &di, sizeof(di)))
1047 err = -EFAULT;
1048
1049 hci_dev_put(hdev);
1050
1051 return err;
1052 }
1053
1054 /* ---- Interface to HCI drivers ---- */
1055
1056 static int hci_rfkill_set_block(void *data, bool blocked)
1057 {
1058 struct hci_dev *hdev = data;
1059
1060 BT_DBG("%p name %s blocked %d", hdev, hdev->name, blocked);
1061
1062 if (!blocked)
1063 return 0;
1064
1065 hci_dev_do_close(hdev);
1066
1067 return 0;
1068 }
1069
1070 static const struct rfkill_ops hci_rfkill_ops = {
1071 .set_block = hci_rfkill_set_block,
1072 };
1073
1074 static void hci_power_on(struct work_struct *work)
1075 {
1076 struct hci_dev *hdev = container_of(work, struct hci_dev, power_on);
1077
1078 BT_DBG("%s", hdev->name);
1079
1080 if (hci_dev_open(hdev->id) < 0)
1081 return;
1082
1083 if (test_bit(HCI_AUTO_OFF, &hdev->dev_flags))
1084 schedule_delayed_work(&hdev->power_off, HCI_AUTO_OFF_TIMEOUT);
1085
1086 if (test_and_clear_bit(HCI_SETUP, &hdev->dev_flags))
1087 mgmt_index_added(hdev);
1088 }
1089
1090 static void hci_power_off(struct work_struct *work)
1091 {
1092 struct hci_dev *hdev = container_of(work, struct hci_dev,
1093 power_off.work);
1094
1095 BT_DBG("%s", hdev->name);
1096
1097 hci_dev_do_close(hdev);
1098 }
1099
1100 static void hci_discov_off(struct work_struct *work)
1101 {
1102 struct hci_dev *hdev;
1103 u8 scan = SCAN_PAGE;
1104
1105 hdev = container_of(work, struct hci_dev, discov_off.work);
1106
1107 BT_DBG("%s", hdev->name);
1108
1109 hci_dev_lock(hdev);
1110
1111 hci_send_cmd(hdev, HCI_OP_WRITE_SCAN_ENABLE, sizeof(scan), &scan);
1112
1113 hdev->discov_timeout = 0;
1114
1115 hci_dev_unlock(hdev);
1116 }
1117
1118 int hci_uuids_clear(struct hci_dev *hdev)
1119 {
1120 struct list_head *p, *n;
1121
1122 list_for_each_safe(p, n, &hdev->uuids) {
1123 struct bt_uuid *uuid;
1124
1125 uuid = list_entry(p, struct bt_uuid, list);
1126
1127 list_del(p);
1128 kfree(uuid);
1129 }
1130
1131 return 0;
1132 }
1133
1134 int hci_link_keys_clear(struct hci_dev *hdev)
1135 {
1136 struct list_head *p, *n;
1137
1138 list_for_each_safe(p, n, &hdev->link_keys) {
1139 struct link_key *key;
1140
1141 key = list_entry(p, struct link_key, list);
1142
1143 list_del(p);
1144 kfree(key);
1145 }
1146
1147 return 0;
1148 }
1149
1150 int hci_smp_ltks_clear(struct hci_dev *hdev)
1151 {
1152 struct smp_ltk *k, *tmp;
1153
1154 list_for_each_entry_safe(k, tmp, &hdev->long_term_keys, list) {
1155 list_del(&k->list);
1156 kfree(k);
1157 }
1158
1159 return 0;
1160 }
1161
1162 struct link_key *hci_find_link_key(struct hci_dev *hdev, bdaddr_t *bdaddr)
1163 {
1164 struct link_key *k;
1165
1166 list_for_each_entry(k, &hdev->link_keys, list)
1167 if (bacmp(bdaddr, &k->bdaddr) == 0)
1168 return k;
1169
1170 return NULL;
1171 }
1172
1173 static bool hci_persistent_key(struct hci_dev *hdev, struct hci_conn *conn,
1174 u8 key_type, u8 old_key_type)
1175 {
1176 /* Legacy key */
1177 if (key_type < 0x03)
1178 return true;
1179
1180 /* Debug keys are insecure so don't store them persistently */
1181 if (key_type == HCI_LK_DEBUG_COMBINATION)
1182 return false;
1183
1184 /* Changed combination key and there's no previous one */
1185 if (key_type == HCI_LK_CHANGED_COMBINATION && old_key_type == 0xff)
1186 return false;
1187
1188 /* Security mode 3 case */
1189 if (!conn)
1190 return true;
1191
1192 /* Neither local nor remote side had no-bonding as requirement */
1193 if (conn->auth_type > 0x01 && conn->remote_auth > 0x01)
1194 return true;
1195
1196 /* Local side had dedicated bonding as requirement */
1197 if (conn->auth_type == 0x02 || conn->auth_type == 0x03)
1198 return true;
1199
1200 /* Remote side had dedicated bonding as requirement */
1201 if (conn->remote_auth == 0x02 || conn->remote_auth == 0x03)
1202 return true;
1203
1204 /* If none of the above criteria match, then don't store the key
1205 * persistently */
1206 return false;
1207 }
1208
1209 struct smp_ltk *hci_find_ltk(struct hci_dev *hdev, __le16 ediv, u8 rand[8])
1210 {
1211 struct smp_ltk *k;
1212
1213 list_for_each_entry(k, &hdev->long_term_keys, list) {
1214 if (k->ediv != ediv ||
1215 memcmp(rand, k->rand, sizeof(k->rand)))
1216 continue;
1217
1218 return k;
1219 }
1220
1221 return NULL;
1222 }
1223
1224 struct smp_ltk *hci_find_ltk_by_addr(struct hci_dev *hdev, bdaddr_t *bdaddr,
1225 u8 addr_type)
1226 {
1227 struct smp_ltk *k;
1228
1229 list_for_each_entry(k, &hdev->long_term_keys, list)
1230 if (addr_type == k->bdaddr_type &&
1231 bacmp(bdaddr, &k->bdaddr) == 0)
1232 return k;
1233
1234 return NULL;
1235 }
1236
1237 int hci_add_link_key(struct hci_dev *hdev, struct hci_conn *conn, int new_key,
1238 bdaddr_t *bdaddr, u8 *val, u8 type, u8 pin_len)
1239 {
1240 struct link_key *key, *old_key;
1241 u8 old_key_type;
1242 bool persistent;
1243
1244 old_key = hci_find_link_key(hdev, bdaddr);
1245 if (old_key) {
1246 old_key_type = old_key->type;
1247 key = old_key;
1248 } else {
1249 old_key_type = conn ? conn->key_type : 0xff;
1250 key = kzalloc(sizeof(*key), GFP_ATOMIC);
1251 if (!key)
1252 return -ENOMEM;
1253 list_add(&key->list, &hdev->link_keys);
1254 }
1255
1256 BT_DBG("%s key for %s type %u", hdev->name, batostr(bdaddr), type);
1257
1258 /* Some buggy controller combinations generate a changed
1259 * combination key for legacy pairing even when there's no
1260 * previous key */
1261 if (type == HCI_LK_CHANGED_COMBINATION &&
1262 (!conn || conn->remote_auth == 0xff) && old_key_type == 0xff) {
1263 type = HCI_LK_COMBINATION;
1264 if (conn)
1265 conn->key_type = type;
1266 }
1267
1268 bacpy(&key->bdaddr, bdaddr);
1269 memcpy(key->val, val, HCI_LINK_KEY_SIZE);
1270 key->pin_len = pin_len;
1271
1272 if (type == HCI_LK_CHANGED_COMBINATION)
1273 key->type = old_key_type;
1274 else
1275 key->type = type;
1276
1277 if (!new_key)
1278 return 0;
1279
1280 persistent = hci_persistent_key(hdev, conn, type, old_key_type);
1281
1282 mgmt_new_link_key(hdev, key, persistent);
1283
1284 if (conn)
1285 conn->flush_key = !persistent;
1286
1287 return 0;
1288 }
1289
1290 int hci_add_ltk(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 addr_type, u8 type,
1291 int new_key, u8 authenticated, u8 tk[16], u8 enc_size, __le16
1292 ediv, u8 rand[8])
1293 {
1294 struct smp_ltk *key, *old_key;
1295
1296 if (!(type & HCI_SMP_STK) && !(type & HCI_SMP_LTK))
1297 return 0;
1298
1299 old_key = hci_find_ltk_by_addr(hdev, bdaddr, addr_type);
1300 if (old_key)
1301 key = old_key;
1302 else {
1303 key = kzalloc(sizeof(*key), GFP_ATOMIC);
1304 if (!key)
1305 return -ENOMEM;
1306 list_add(&key->list, &hdev->long_term_keys);
1307 }
1308
1309 bacpy(&key->bdaddr, bdaddr);
1310 key->bdaddr_type = addr_type;
1311 memcpy(key->val, tk, sizeof(key->val));
1312 key->authenticated = authenticated;
1313 key->ediv = ediv;
1314 key->enc_size = enc_size;
1315 key->type = type;
1316 memcpy(key->rand, rand, sizeof(key->rand));
1317
1318 if (!new_key)
1319 return 0;
1320
1321 if (type & HCI_SMP_LTK)
1322 mgmt_new_ltk(hdev, key, 1);
1323
1324 return 0;
1325 }
1326
1327 int hci_remove_link_key(struct hci_dev *hdev, bdaddr_t *bdaddr)
1328 {
1329 struct link_key *key;
1330
1331 key = hci_find_link_key(hdev, bdaddr);
1332 if (!key)
1333 return -ENOENT;
1334
1335 BT_DBG("%s removing %s", hdev->name, batostr(bdaddr));
1336
1337 list_del(&key->list);
1338 kfree(key);
1339
1340 return 0;
1341 }
1342
1343 int hci_remove_ltk(struct hci_dev *hdev, bdaddr_t *bdaddr)
1344 {
1345 struct smp_ltk *k, *tmp;
1346
1347 list_for_each_entry_safe(k, tmp, &hdev->long_term_keys, list) {
1348 if (bacmp(bdaddr, &k->bdaddr))
1349 continue;
1350
1351 BT_DBG("%s removing %s", hdev->name, batostr(bdaddr));
1352
1353 list_del(&k->list);
1354 kfree(k);
1355 }
1356
1357 return 0;
1358 }
1359
1360 /* HCI command timer function */
1361 static void hci_cmd_timeout(unsigned long arg)
1362 {
1363 struct hci_dev *hdev = (void *) arg;
1364
1365 if (hdev->sent_cmd) {
1366 struct hci_command_hdr *sent = (void *) hdev->sent_cmd->data;
1367 u16 opcode = __le16_to_cpu(sent->opcode);
1368
1369 BT_ERR("%s command 0x%4.4x tx timeout", hdev->name, opcode);
1370 } else {
1371 BT_ERR("%s command tx timeout", hdev->name);
1372 }
1373
1374 atomic_set(&hdev->cmd_cnt, 1);
1375 queue_work(hdev->workqueue, &hdev->cmd_work);
1376 }
1377
1378 struct oob_data *hci_find_remote_oob_data(struct hci_dev *hdev,
1379 bdaddr_t *bdaddr)
1380 {
1381 struct oob_data *data;
1382
1383 list_for_each_entry(data, &hdev->remote_oob_data, list)
1384 if (bacmp(bdaddr, &data->bdaddr) == 0)
1385 return data;
1386
1387 return NULL;
1388 }
1389
1390 int hci_remove_remote_oob_data(struct hci_dev *hdev, bdaddr_t *bdaddr)
1391 {
1392 struct oob_data *data;
1393
1394 data = hci_find_remote_oob_data(hdev, bdaddr);
1395 if (!data)
1396 return -ENOENT;
1397
1398 BT_DBG("%s removing %s", hdev->name, batostr(bdaddr));
1399
1400 list_del(&data->list);
1401 kfree(data);
1402
1403 return 0;
1404 }
1405
1406 int hci_remote_oob_data_clear(struct hci_dev *hdev)
1407 {
1408 struct oob_data *data, *n;
1409
1410 list_for_each_entry_safe(data, n, &hdev->remote_oob_data, list) {
1411 list_del(&data->list);
1412 kfree(data);
1413 }
1414
1415 return 0;
1416 }
1417
1418 int hci_add_remote_oob_data(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 *hash,
1419 u8 *randomizer)
1420 {
1421 struct oob_data *data;
1422
1423 data = hci_find_remote_oob_data(hdev, bdaddr);
1424
1425 if (!data) {
1426 data = kmalloc(sizeof(*data), GFP_ATOMIC);
1427 if (!data)
1428 return -ENOMEM;
1429
1430 bacpy(&data->bdaddr, bdaddr);
1431 list_add(&data->list, &hdev->remote_oob_data);
1432 }
1433
1434 memcpy(data->hash, hash, sizeof(data->hash));
1435 memcpy(data->randomizer, randomizer, sizeof(data->randomizer));
1436
1437 BT_DBG("%s for %s", hdev->name, batostr(bdaddr));
1438
1439 return 0;
1440 }
1441
1442 struct bdaddr_list *hci_blacklist_lookup(struct hci_dev *hdev, bdaddr_t *bdaddr)
1443 {
1444 struct bdaddr_list *b;
1445
1446 list_for_each_entry(b, &hdev->blacklist, list)
1447 if (bacmp(bdaddr, &b->bdaddr) == 0)
1448 return b;
1449
1450 return NULL;
1451 }
1452
1453 int hci_blacklist_clear(struct hci_dev *hdev)
1454 {
1455 struct list_head *p, *n;
1456
1457 list_for_each_safe(p, n, &hdev->blacklist) {
1458 struct bdaddr_list *b;
1459
1460 b = list_entry(p, struct bdaddr_list, list);
1461
1462 list_del(p);
1463 kfree(b);
1464 }
1465
1466 return 0;
1467 }
1468
1469 int hci_blacklist_add(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 type)
1470 {
1471 struct bdaddr_list *entry;
1472
1473 if (bacmp(bdaddr, BDADDR_ANY) == 0)
1474 return -EBADF;
1475
1476 if (hci_blacklist_lookup(hdev, bdaddr))
1477 return -EEXIST;
1478
1479 entry = kzalloc(sizeof(struct bdaddr_list), GFP_KERNEL);
1480 if (!entry)
1481 return -ENOMEM;
1482
1483 bacpy(&entry->bdaddr, bdaddr);
1484
1485 list_add(&entry->list, &hdev->blacklist);
1486
1487 return mgmt_device_blocked(hdev, bdaddr, type);
1488 }
1489
1490 int hci_blacklist_del(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 type)
1491 {
1492 struct bdaddr_list *entry;
1493
1494 if (bacmp(bdaddr, BDADDR_ANY) == 0)
1495 return hci_blacklist_clear(hdev);
1496
1497 entry = hci_blacklist_lookup(hdev, bdaddr);
1498 if (!entry)
1499 return -ENOENT;
1500
1501 list_del(&entry->list);
1502 kfree(entry);
1503
1504 return mgmt_device_unblocked(hdev, bdaddr, type);
1505 }
1506
1507 static void le_scan_param_req(struct hci_dev *hdev, unsigned long opt)
1508 {
1509 struct le_scan_params *param = (struct le_scan_params *) opt;
1510 struct hci_cp_le_set_scan_param cp;
1511
1512 memset(&cp, 0, sizeof(cp));
1513 cp.type = param->type;
1514 cp.interval = cpu_to_le16(param->interval);
1515 cp.window = cpu_to_le16(param->window);
1516
1517 hci_send_cmd(hdev, HCI_OP_LE_SET_SCAN_PARAM, sizeof(cp), &cp);
1518 }
1519
1520 static void le_scan_enable_req(struct hci_dev *hdev, unsigned long opt)
1521 {
1522 struct hci_cp_le_set_scan_enable cp;
1523
1524 memset(&cp, 0, sizeof(cp));
1525 cp.enable = 1;
1526 cp.filter_dup = 1;
1527
1528 hci_send_cmd(hdev, HCI_OP_LE_SET_SCAN_ENABLE, sizeof(cp), &cp);
1529 }
1530
1531 static int hci_do_le_scan(struct hci_dev *hdev, u8 type, u16 interval,
1532 u16 window, int timeout)
1533 {
1534 long timeo = msecs_to_jiffies(3000);
1535 struct le_scan_params param;
1536 int err;
1537
1538 BT_DBG("%s", hdev->name);
1539
1540 if (test_bit(HCI_LE_SCAN, &hdev->dev_flags))
1541 return -EINPROGRESS;
1542
1543 param.type = type;
1544 param.interval = interval;
1545 param.window = window;
1546
1547 hci_req_lock(hdev);
1548
1549 err = __hci_request(hdev, le_scan_param_req, (unsigned long) &param,
1550 timeo);
1551 if (!err)
1552 err = __hci_request(hdev, le_scan_enable_req, 0, timeo);
1553
1554 hci_req_unlock(hdev);
1555
1556 if (err < 0)
1557 return err;
1558
1559 schedule_delayed_work(&hdev->le_scan_disable,
1560 msecs_to_jiffies(timeout));
1561
1562 return 0;
1563 }
1564
1565 int hci_cancel_le_scan(struct hci_dev *hdev)
1566 {
1567 BT_DBG("%s", hdev->name);
1568
1569 if (!test_bit(HCI_LE_SCAN, &hdev->dev_flags))
1570 return -EALREADY;
1571
1572 if (cancel_delayed_work(&hdev->le_scan_disable)) {
1573 struct hci_cp_le_set_scan_enable cp;
1574
1575 /* Send HCI command to disable LE Scan */
1576 memset(&cp, 0, sizeof(cp));
1577 hci_send_cmd(hdev, HCI_OP_LE_SET_SCAN_ENABLE, sizeof(cp), &cp);
1578 }
1579
1580 return 0;
1581 }
1582
1583 static void le_scan_disable_work(struct work_struct *work)
1584 {
1585 struct hci_dev *hdev = container_of(work, struct hci_dev,
1586 le_scan_disable.work);
1587 struct hci_cp_le_set_scan_enable cp;
1588
1589 BT_DBG("%s", hdev->name);
1590
1591 memset(&cp, 0, sizeof(cp));
1592
1593 hci_send_cmd(hdev, HCI_OP_LE_SET_SCAN_ENABLE, sizeof(cp), &cp);
1594 }
1595
1596 static void le_scan_work(struct work_struct *work)
1597 {
1598 struct hci_dev *hdev = container_of(work, struct hci_dev, le_scan);
1599 struct le_scan_params *param = &hdev->le_scan_params;
1600
1601 BT_DBG("%s", hdev->name);
1602
1603 hci_do_le_scan(hdev, param->type, param->interval, param->window,
1604 param->timeout);
1605 }
1606
1607 int hci_le_scan(struct hci_dev *hdev, u8 type, u16 interval, u16 window,
1608 int timeout)
1609 {
1610 struct le_scan_params *param = &hdev->le_scan_params;
1611
1612 BT_DBG("%s", hdev->name);
1613
1614 if (work_busy(&hdev->le_scan))
1615 return -EINPROGRESS;
1616
1617 param->type = type;
1618 param->interval = interval;
1619 param->window = window;
1620 param->timeout = timeout;
1621
1622 queue_work(system_long_wq, &hdev->le_scan);
1623
1624 return 0;
1625 }
1626
1627 /* Alloc HCI device */
1628 struct hci_dev *hci_alloc_dev(void)
1629 {
1630 struct hci_dev *hdev;
1631
1632 hdev = kzalloc(sizeof(struct hci_dev), GFP_KERNEL);
1633 if (!hdev)
1634 return NULL;
1635
1636 hdev->pkt_type = (HCI_DM1 | HCI_DH1 | HCI_HV1);
1637 hdev->esco_type = (ESCO_HV1);
1638 hdev->link_mode = (HCI_LM_ACCEPT);
1639 hdev->io_capability = 0x03; /* No Input No Output */
1640
1641 hdev->sniff_max_interval = 800;
1642 hdev->sniff_min_interval = 80;
1643
1644 mutex_init(&hdev->lock);
1645 mutex_init(&hdev->req_lock);
1646
1647 INIT_LIST_HEAD(&hdev->mgmt_pending);
1648 INIT_LIST_HEAD(&hdev->blacklist);
1649 INIT_LIST_HEAD(&hdev->uuids);
1650 INIT_LIST_HEAD(&hdev->link_keys);
1651 INIT_LIST_HEAD(&hdev->long_term_keys);
1652 INIT_LIST_HEAD(&hdev->remote_oob_data);
1653
1654 INIT_WORK(&hdev->rx_work, hci_rx_work);
1655 INIT_WORK(&hdev->cmd_work, hci_cmd_work);
1656 INIT_WORK(&hdev->tx_work, hci_tx_work);
1657 INIT_WORK(&hdev->power_on, hci_power_on);
1658 INIT_WORK(&hdev->le_scan, le_scan_work);
1659
1660 INIT_DELAYED_WORK(&hdev->power_off, hci_power_off);
1661 INIT_DELAYED_WORK(&hdev->discov_off, hci_discov_off);
1662 INIT_DELAYED_WORK(&hdev->le_scan_disable, le_scan_disable_work);
1663
1664 skb_queue_head_init(&hdev->driver_init);
1665 skb_queue_head_init(&hdev->rx_q);
1666 skb_queue_head_init(&hdev->cmd_q);
1667 skb_queue_head_init(&hdev->raw_q);
1668
1669 init_waitqueue_head(&hdev->req_wait_q);
1670
1671 setup_timer(&hdev->cmd_timer, hci_cmd_timeout, (unsigned long) hdev);
1672
1673 hci_init_sysfs(hdev);
1674 discovery_init(hdev);
1675 hci_conn_hash_init(hdev);
1676
1677 return hdev;
1678 }
1679 EXPORT_SYMBOL(hci_alloc_dev);
1680
1681 /* Free HCI device */
1682 void hci_free_dev(struct hci_dev *hdev)
1683 {
1684 skb_queue_purge(&hdev->driver_init);
1685
1686 /* will free via device release */
1687 put_device(&hdev->dev);
1688 }
1689 EXPORT_SYMBOL(hci_free_dev);
1690
1691 /* Register HCI device */
1692 int hci_register_dev(struct hci_dev *hdev)
1693 {
1694 int id, error;
1695
1696 if (!hdev->open || !hdev->close)
1697 return -EINVAL;
1698
1699 /* Do not allow HCI_AMP devices to register at index 0,
1700 * so the index can be used as the AMP controller ID.
1701 */
1702 switch (hdev->dev_type) {
1703 case HCI_BREDR:
1704 id = ida_simple_get(&hci_index_ida, 0, 0, GFP_KERNEL);
1705 break;
1706 case HCI_AMP:
1707 id = ida_simple_get(&hci_index_ida, 1, 0, GFP_KERNEL);
1708 break;
1709 default:
1710 return -EINVAL;
1711 }
1712
1713 if (id < 0)
1714 return id;
1715
1716 sprintf(hdev->name, "hci%d", id);
1717 hdev->id = id;
1718
1719 BT_DBG("%p name %s bus %d", hdev, hdev->name, hdev->bus);
1720
1721 write_lock(&hci_dev_list_lock);
1722 list_add(&hdev->list, &hci_dev_list);
1723 write_unlock(&hci_dev_list_lock);
1724
1725 hdev->workqueue = alloc_workqueue(hdev->name, WQ_HIGHPRI | WQ_UNBOUND |
1726 WQ_MEM_RECLAIM, 1);
1727 if (!hdev->workqueue) {
1728 error = -ENOMEM;
1729 goto err;
1730 }
1731
1732 error = hci_add_sysfs(hdev);
1733 if (error < 0)
1734 goto err_wqueue;
1735
1736 hdev->rfkill = rfkill_alloc(hdev->name, &hdev->dev,
1737 RFKILL_TYPE_BLUETOOTH, &hci_rfkill_ops,
1738 hdev);
1739 if (hdev->rfkill) {
1740 if (rfkill_register(hdev->rfkill) < 0) {
1741 rfkill_destroy(hdev->rfkill);
1742 hdev->rfkill = NULL;
1743 }
1744 }
1745
1746 set_bit(HCI_SETUP, &hdev->dev_flags);
1747
1748 if (hdev->dev_type != HCI_AMP)
1749 set_bit(HCI_AUTO_OFF, &hdev->dev_flags);
1750
1751 schedule_work(&hdev->power_on);
1752
1753 hci_notify(hdev, HCI_DEV_REG);
1754 hci_dev_hold(hdev);
1755
1756 return id;
1757
1758 err_wqueue:
1759 destroy_workqueue(hdev->workqueue);
1760 err:
1761 ida_simple_remove(&hci_index_ida, hdev->id);
1762 write_lock(&hci_dev_list_lock);
1763 list_del(&hdev->list);
1764 write_unlock(&hci_dev_list_lock);
1765
1766 return error;
1767 }
1768 EXPORT_SYMBOL(hci_register_dev);
1769
1770 /* Unregister HCI device */
1771 void hci_unregister_dev(struct hci_dev *hdev)
1772 {
1773 int i, id;
1774
1775 BT_DBG("%p name %s bus %d", hdev, hdev->name, hdev->bus);
1776
1777 set_bit(HCI_UNREGISTER, &hdev->dev_flags);
1778
1779 id = hdev->id;
1780
1781 write_lock(&hci_dev_list_lock);
1782 list_del(&hdev->list);
1783 write_unlock(&hci_dev_list_lock);
1784
1785 hci_dev_do_close(hdev);
1786
1787 for (i = 0; i < NUM_REASSEMBLY; i++)
1788 kfree_skb(hdev->reassembly[i]);
1789
1790 if (!test_bit(HCI_INIT, &hdev->flags) &&
1791 !test_bit(HCI_SETUP, &hdev->dev_flags)) {
1792 hci_dev_lock(hdev);
1793 mgmt_index_removed(hdev);
1794 hci_dev_unlock(hdev);
1795 }
1796
1797 /* mgmt_index_removed should take care of emptying the
1798 * pending list */
1799 BUG_ON(!list_empty(&hdev->mgmt_pending));
1800
1801 hci_notify(hdev, HCI_DEV_UNREG);
1802
1803 if (hdev->rfkill) {
1804 rfkill_unregister(hdev->rfkill);
1805 rfkill_destroy(hdev->rfkill);
1806 }
1807
1808 hci_del_sysfs(hdev);
1809
1810 destroy_workqueue(hdev->workqueue);
1811
1812 hci_dev_lock(hdev);
1813 hci_blacklist_clear(hdev);
1814 hci_uuids_clear(hdev);
1815 hci_link_keys_clear(hdev);
1816 hci_smp_ltks_clear(hdev);
1817 hci_remote_oob_data_clear(hdev);
1818 hci_dev_unlock(hdev);
1819
1820 hci_dev_put(hdev);
1821
1822 ida_simple_remove(&hci_index_ida, id);
1823 }
1824 EXPORT_SYMBOL(hci_unregister_dev);
1825
1826 /* Suspend HCI device */
1827 int hci_suspend_dev(struct hci_dev *hdev)
1828 {
1829 hci_notify(hdev, HCI_DEV_SUSPEND);
1830 return 0;
1831 }
1832 EXPORT_SYMBOL(hci_suspend_dev);
1833
1834 /* Resume HCI device */
1835 int hci_resume_dev(struct hci_dev *hdev)
1836 {
1837 hci_notify(hdev, HCI_DEV_RESUME);
1838 return 0;
1839 }
1840 EXPORT_SYMBOL(hci_resume_dev);
1841
1842 /* Receive frame from HCI drivers */
1843 int hci_recv_frame(struct sk_buff *skb)
1844 {
1845 struct hci_dev *hdev = (struct hci_dev *) skb->dev;
1846 if (!hdev || (!test_bit(HCI_UP, &hdev->flags)
1847 && !test_bit(HCI_INIT, &hdev->flags))) {
1848 kfree_skb(skb);
1849 return -ENXIO;
1850 }
1851
1852 /* Incomming skb */
1853 bt_cb(skb)->incoming = 1;
1854
1855 /* Time stamp */
1856 __net_timestamp(skb);
1857
1858 skb_queue_tail(&hdev->rx_q, skb);
1859 queue_work(hdev->workqueue, &hdev->rx_work);
1860
1861 return 0;
1862 }
1863 EXPORT_SYMBOL(hci_recv_frame);
1864
1865 static int hci_reassembly(struct hci_dev *hdev, int type, void *data,
1866 int count, __u8 index)
1867 {
1868 int len = 0;
1869 int hlen = 0;
1870 int remain = count;
1871 struct sk_buff *skb;
1872 struct bt_skb_cb *scb;
1873
1874 if ((type < HCI_ACLDATA_PKT || type > HCI_EVENT_PKT) ||
1875 index >= NUM_REASSEMBLY)
1876 return -EILSEQ;
1877
1878 skb = hdev->reassembly[index];
1879
1880 if (!skb) {
1881 switch (type) {
1882 case HCI_ACLDATA_PKT:
1883 len = HCI_MAX_FRAME_SIZE;
1884 hlen = HCI_ACL_HDR_SIZE;
1885 break;
1886 case HCI_EVENT_PKT:
1887 len = HCI_MAX_EVENT_SIZE;
1888 hlen = HCI_EVENT_HDR_SIZE;
1889 break;
1890 case HCI_SCODATA_PKT:
1891 len = HCI_MAX_SCO_SIZE;
1892 hlen = HCI_SCO_HDR_SIZE;
1893 break;
1894 }
1895
1896 skb = bt_skb_alloc(len, GFP_ATOMIC);
1897 if (!skb)
1898 return -ENOMEM;
1899
1900 scb = (void *) skb->cb;
1901 scb->expect = hlen;
1902 scb->pkt_type = type;
1903
1904 skb->dev = (void *) hdev;
1905 hdev->reassembly[index] = skb;
1906 }
1907
1908 while (count) {
1909 scb = (void *) skb->cb;
1910 len = min_t(uint, scb->expect, count);
1911
1912 memcpy(skb_put(skb, len), data, len);
1913
1914 count -= len;
1915 data += len;
1916 scb->expect -= len;
1917 remain = count;
1918
1919 switch (type) {
1920 case HCI_EVENT_PKT:
1921 if (skb->len == HCI_EVENT_HDR_SIZE) {
1922 struct hci_event_hdr *h = hci_event_hdr(skb);
1923 scb->expect = h->plen;
1924
1925 if (skb_tailroom(skb) < scb->expect) {
1926 kfree_skb(skb);
1927 hdev->reassembly[index] = NULL;
1928 return -ENOMEM;
1929 }
1930 }
1931 break;
1932
1933 case HCI_ACLDATA_PKT:
1934 if (skb->len == HCI_ACL_HDR_SIZE) {
1935 struct hci_acl_hdr *h = hci_acl_hdr(skb);
1936 scb->expect = __le16_to_cpu(h->dlen);
1937
1938 if (skb_tailroom(skb) < scb->expect) {
1939 kfree_skb(skb);
1940 hdev->reassembly[index] = NULL;
1941 return -ENOMEM;
1942 }
1943 }
1944 break;
1945
1946 case HCI_SCODATA_PKT:
1947 if (skb->len == HCI_SCO_HDR_SIZE) {
1948 struct hci_sco_hdr *h = hci_sco_hdr(skb);
1949 scb->expect = h->dlen;
1950
1951 if (skb_tailroom(skb) < scb->expect) {
1952 kfree_skb(skb);
1953 hdev->reassembly[index] = NULL;
1954 return -ENOMEM;
1955 }
1956 }
1957 break;
1958 }
1959
1960 if (scb->expect == 0) {
1961 /* Complete frame */
1962
1963 bt_cb(skb)->pkt_type = type;
1964 hci_recv_frame(skb);
1965
1966 hdev->reassembly[index] = NULL;
1967 return remain;
1968 }
1969 }
1970
1971 return remain;
1972 }
1973
1974 int hci_recv_fragment(struct hci_dev *hdev, int type, void *data, int count)
1975 {
1976 int rem = 0;
1977
1978 if (type < HCI_ACLDATA_PKT || type > HCI_EVENT_PKT)
1979 return -EILSEQ;
1980
1981 while (count) {
1982 rem = hci_reassembly(hdev, type, data, count, type - 1);
1983 if (rem < 0)
1984 return rem;
1985
1986 data += (count - rem);
1987 count = rem;
1988 }
1989
1990 return rem;
1991 }
1992 EXPORT_SYMBOL(hci_recv_fragment);
1993
1994 #define STREAM_REASSEMBLY 0
1995
1996 int hci_recv_stream_fragment(struct hci_dev *hdev, void *data, int count)
1997 {
1998 int type;
1999 int rem = 0;
2000
2001 while (count) {
2002 struct sk_buff *skb = hdev->reassembly[STREAM_REASSEMBLY];
2003
2004 if (!skb) {
2005 struct { char type; } *pkt;
2006
2007 /* Start of the frame */
2008 pkt = data;
2009 type = pkt->type;
2010
2011 data++;
2012 count--;
2013 } else
2014 type = bt_cb(skb)->pkt_type;
2015
2016 rem = hci_reassembly(hdev, type, data, count,
2017 STREAM_REASSEMBLY);
2018 if (rem < 0)
2019 return rem;
2020
2021 data += (count - rem);
2022 count = rem;
2023 }
2024
2025 return rem;
2026 }
2027 EXPORT_SYMBOL(hci_recv_stream_fragment);
2028
2029 /* ---- Interface to upper protocols ---- */
2030
2031 int hci_register_cb(struct hci_cb *cb)
2032 {
2033 BT_DBG("%p name %s", cb, cb->name);
2034
2035 write_lock(&hci_cb_list_lock);
2036 list_add(&cb->list, &hci_cb_list);
2037 write_unlock(&hci_cb_list_lock);
2038
2039 return 0;
2040 }
2041 EXPORT_SYMBOL(hci_register_cb);
2042
2043 int hci_unregister_cb(struct hci_cb *cb)
2044 {
2045 BT_DBG("%p name %s", cb, cb->name);
2046
2047 write_lock(&hci_cb_list_lock);
2048 list_del(&cb->list);
2049 write_unlock(&hci_cb_list_lock);
2050
2051 return 0;
2052 }
2053 EXPORT_SYMBOL(hci_unregister_cb);
2054
2055 static int hci_send_frame(struct sk_buff *skb)
2056 {
2057 struct hci_dev *hdev = (struct hci_dev *) skb->dev;
2058
2059 if (!hdev) {
2060 kfree_skb(skb);
2061 return -ENODEV;
2062 }
2063
2064 BT_DBG("%s type %d len %d", hdev->name, bt_cb(skb)->pkt_type, skb->len);
2065
2066 /* Time stamp */
2067 __net_timestamp(skb);
2068
2069 /* Send copy to monitor */
2070 hci_send_to_monitor(hdev, skb);
2071
2072 if (atomic_read(&hdev->promisc)) {
2073 /* Send copy to the sockets */
2074 hci_send_to_sock(hdev, skb);
2075 }
2076
2077 /* Get rid of skb owner, prior to sending to the driver. */
2078 skb_orphan(skb);
2079
2080 return hdev->send(skb);
2081 }
2082
2083 /* Send HCI command */
2084 int hci_send_cmd(struct hci_dev *hdev, __u16 opcode, __u32 plen, void *param)
2085 {
2086 int len = HCI_COMMAND_HDR_SIZE + plen;
2087 struct hci_command_hdr *hdr;
2088 struct sk_buff *skb;
2089
2090 BT_DBG("%s opcode 0x%4.4x plen %d", hdev->name, opcode, plen);
2091
2092 skb = bt_skb_alloc(len, GFP_ATOMIC);
2093 if (!skb) {
2094 BT_ERR("%s no memory for command", hdev->name);
2095 return -ENOMEM;
2096 }
2097
2098 hdr = (struct hci_command_hdr *) skb_put(skb, HCI_COMMAND_HDR_SIZE);
2099 hdr->opcode = cpu_to_le16(opcode);
2100 hdr->plen = plen;
2101
2102 if (plen)
2103 memcpy(skb_put(skb, plen), param, plen);
2104
2105 BT_DBG("skb len %d", skb->len);
2106
2107 bt_cb(skb)->pkt_type = HCI_COMMAND_PKT;
2108 skb->dev = (void *) hdev;
2109
2110 if (test_bit(HCI_INIT, &hdev->flags))
2111 hdev->init_last_cmd = opcode;
2112
2113 skb_queue_tail(&hdev->cmd_q, skb);
2114 queue_work(hdev->workqueue, &hdev->cmd_work);
2115
2116 return 0;
2117 }
2118
2119 /* Get data from the previously sent command */
2120 void *hci_sent_cmd_data(struct hci_dev *hdev, __u16 opcode)
2121 {
2122 struct hci_command_hdr *hdr;
2123
2124 if (!hdev->sent_cmd)
2125 return NULL;
2126
2127 hdr = (void *) hdev->sent_cmd->data;
2128
2129 if (hdr->opcode != cpu_to_le16(opcode))
2130 return NULL;
2131
2132 BT_DBG("%s opcode 0x%4.4x", hdev->name, opcode);
2133
2134 return hdev->sent_cmd->data + HCI_COMMAND_HDR_SIZE;
2135 }
2136
2137 /* Send ACL data */
2138 static void hci_add_acl_hdr(struct sk_buff *skb, __u16 handle, __u16 flags)
2139 {
2140 struct hci_acl_hdr *hdr;
2141 int len = skb->len;
2142
2143 skb_push(skb, HCI_ACL_HDR_SIZE);
2144 skb_reset_transport_header(skb);
2145 hdr = (struct hci_acl_hdr *)skb_transport_header(skb);
2146 hdr->handle = cpu_to_le16(hci_handle_pack(handle, flags));
2147 hdr->dlen = cpu_to_le16(len);
2148 }
2149
2150 static void hci_queue_acl(struct hci_conn *conn, struct sk_buff_head *queue,
2151 struct sk_buff *skb, __u16 flags)
2152 {
2153 struct hci_dev *hdev = conn->hdev;
2154 struct sk_buff *list;
2155
2156 skb->len = skb_headlen(skb);
2157 skb->data_len = 0;
2158
2159 bt_cb(skb)->pkt_type = HCI_ACLDATA_PKT;
2160 hci_add_acl_hdr(skb, conn->handle, flags);
2161
2162 list = skb_shinfo(skb)->frag_list;
2163 if (!list) {
2164 /* Non fragmented */
2165 BT_DBG("%s nonfrag skb %p len %d", hdev->name, skb, skb->len);
2166
2167 skb_queue_tail(queue, skb);
2168 } else {
2169 /* Fragmented */
2170 BT_DBG("%s frag %p len %d", hdev->name, skb, skb->len);
2171
2172 skb_shinfo(skb)->frag_list = NULL;
2173
2174 /* Queue all fragments atomically */
2175 spin_lock(&queue->lock);
2176
2177 __skb_queue_tail(queue, skb);
2178
2179 flags &= ~ACL_START;
2180 flags |= ACL_CONT;
2181 do {
2182 skb = list; list = list->next;
2183
2184 skb->dev = (void *) hdev;
2185 bt_cb(skb)->pkt_type = HCI_ACLDATA_PKT;
2186 hci_add_acl_hdr(skb, conn->handle, flags);
2187
2188 BT_DBG("%s frag %p len %d", hdev->name, skb, skb->len);
2189
2190 __skb_queue_tail(queue, skb);
2191 } while (list);
2192
2193 spin_unlock(&queue->lock);
2194 }
2195 }
2196
2197 void hci_send_acl(struct hci_chan *chan, struct sk_buff *skb, __u16 flags)
2198 {
2199 struct hci_conn *conn = chan->conn;
2200 struct hci_dev *hdev = conn->hdev;
2201
2202 BT_DBG("%s chan %p flags 0x%4.4x", hdev->name, chan, flags);
2203
2204 skb->dev = (void *) hdev;
2205
2206 hci_queue_acl(conn, &chan->data_q, skb, flags);
2207
2208 queue_work(hdev->workqueue, &hdev->tx_work);
2209 }
2210
2211 /* Send SCO data */
2212 void hci_send_sco(struct hci_conn *conn, struct sk_buff *skb)
2213 {
2214 struct hci_dev *hdev = conn->hdev;
2215 struct hci_sco_hdr hdr;
2216
2217 BT_DBG("%s len %d", hdev->name, skb->len);
2218
2219 hdr.handle = cpu_to_le16(conn->handle);
2220 hdr.dlen = skb->len;
2221
2222 skb_push(skb, HCI_SCO_HDR_SIZE);
2223 skb_reset_transport_header(skb);
2224 memcpy(skb_transport_header(skb), &hdr, HCI_SCO_HDR_SIZE);
2225
2226 skb->dev = (void *) hdev;
2227 bt_cb(skb)->pkt_type = HCI_SCODATA_PKT;
2228
2229 skb_queue_tail(&conn->data_q, skb);
2230 queue_work(hdev->workqueue, &hdev->tx_work);
2231 }
2232
2233 /* ---- HCI TX task (outgoing data) ---- */
2234
2235 /* HCI Connection scheduler */
2236 static struct hci_conn *hci_low_sent(struct hci_dev *hdev, __u8 type,
2237 int *quote)
2238 {
2239 struct hci_conn_hash *h = &hdev->conn_hash;
2240 struct hci_conn *conn = NULL, *c;
2241 unsigned int num = 0, min = ~0;
2242
2243 /* We don't have to lock device here. Connections are always
2244 * added and removed with TX task disabled. */
2245
2246 rcu_read_lock();
2247
2248 list_for_each_entry_rcu(c, &h->list, list) {
2249 if (c->type != type || skb_queue_empty(&c->data_q))
2250 continue;
2251
2252 if (c->state != BT_CONNECTED && c->state != BT_CONFIG)
2253 continue;
2254
2255 num++;
2256
2257 if (c->sent < min) {
2258 min = c->sent;
2259 conn = c;
2260 }
2261
2262 if (hci_conn_num(hdev, type) == num)
2263 break;
2264 }
2265
2266 rcu_read_unlock();
2267
2268 if (conn) {
2269 int cnt, q;
2270
2271 switch (conn->type) {
2272 case ACL_LINK:
2273 cnt = hdev->acl_cnt;
2274 break;
2275 case SCO_LINK:
2276 case ESCO_LINK:
2277 cnt = hdev->sco_cnt;
2278 break;
2279 case LE_LINK:
2280 cnt = hdev->le_mtu ? hdev->le_cnt : hdev->acl_cnt;
2281 break;
2282 default:
2283 cnt = 0;
2284 BT_ERR("Unknown link type");
2285 }
2286
2287 q = cnt / num;
2288 *quote = q ? q : 1;
2289 } else
2290 *quote = 0;
2291
2292 BT_DBG("conn %p quote %d", conn, *quote);
2293 return conn;
2294 }
2295
2296 static void hci_link_tx_to(struct hci_dev *hdev, __u8 type)
2297 {
2298 struct hci_conn_hash *h = &hdev->conn_hash;
2299 struct hci_conn *c;
2300
2301 BT_ERR("%s link tx timeout", hdev->name);
2302
2303 rcu_read_lock();
2304
2305 /* Kill stalled connections */
2306 list_for_each_entry_rcu(c, &h->list, list) {
2307 if (c->type == type && c->sent) {
2308 BT_ERR("%s killing stalled connection %s",
2309 hdev->name, batostr(&c->dst));
2310 hci_acl_disconn(c, HCI_ERROR_REMOTE_USER_TERM);
2311 }
2312 }
2313
2314 rcu_read_unlock();
2315 }
2316
2317 static struct hci_chan *hci_chan_sent(struct hci_dev *hdev, __u8 type,
2318 int *quote)
2319 {
2320 struct hci_conn_hash *h = &hdev->conn_hash;
2321 struct hci_chan *chan = NULL;
2322 unsigned int num = 0, min = ~0, cur_prio = 0;
2323 struct hci_conn *conn;
2324 int cnt, q, conn_num = 0;
2325
2326 BT_DBG("%s", hdev->name);
2327
2328 rcu_read_lock();
2329
2330 list_for_each_entry_rcu(conn, &h->list, list) {
2331 struct hci_chan *tmp;
2332
2333 if (conn->type != type)
2334 continue;
2335
2336 if (conn->state != BT_CONNECTED && conn->state != BT_CONFIG)
2337 continue;
2338
2339 conn_num++;
2340
2341 list_for_each_entry_rcu(tmp, &conn->chan_list, list) {
2342 struct sk_buff *skb;
2343
2344 if (skb_queue_empty(&tmp->data_q))
2345 continue;
2346
2347 skb = skb_peek(&tmp->data_q);
2348 if (skb->priority < cur_prio)
2349 continue;
2350
2351 if (skb->priority > cur_prio) {
2352 num = 0;
2353 min = ~0;
2354 cur_prio = skb->priority;
2355 }
2356
2357 num++;
2358
2359 if (conn->sent < min) {
2360 min = conn->sent;
2361 chan = tmp;
2362 }
2363 }
2364
2365 if (hci_conn_num(hdev, type) == conn_num)
2366 break;
2367 }
2368
2369 rcu_read_unlock();
2370
2371 if (!chan)
2372 return NULL;
2373
2374 switch (chan->conn->type) {
2375 case ACL_LINK:
2376 cnt = hdev->acl_cnt;
2377 break;
2378 case SCO_LINK:
2379 case ESCO_LINK:
2380 cnt = hdev->sco_cnt;
2381 break;
2382 case LE_LINK:
2383 cnt = hdev->le_mtu ? hdev->le_cnt : hdev->acl_cnt;
2384 break;
2385 default:
2386 cnt = 0;
2387 BT_ERR("Unknown link type");
2388 }
2389
2390 q = cnt / num;
2391 *quote = q ? q : 1;
2392 BT_DBG("chan %p quote %d", chan, *quote);
2393 return chan;
2394 }
2395
2396 static void hci_prio_recalculate(struct hci_dev *hdev, __u8 type)
2397 {
2398 struct hci_conn_hash *h = &hdev->conn_hash;
2399 struct hci_conn *conn;
2400 int num = 0;
2401
2402 BT_DBG("%s", hdev->name);
2403
2404 rcu_read_lock();
2405
2406 list_for_each_entry_rcu(conn, &h->list, list) {
2407 struct hci_chan *chan;
2408
2409 if (conn->type != type)
2410 continue;
2411
2412 if (conn->state != BT_CONNECTED && conn->state != BT_CONFIG)
2413 continue;
2414
2415 num++;
2416
2417 list_for_each_entry_rcu(chan, &conn->chan_list, list) {
2418 struct sk_buff *skb;
2419
2420 if (chan->sent) {
2421 chan->sent = 0;
2422 continue;
2423 }
2424
2425 if (skb_queue_empty(&chan->data_q))
2426 continue;
2427
2428 skb = skb_peek(&chan->data_q);
2429 if (skb->priority >= HCI_PRIO_MAX - 1)
2430 continue;
2431
2432 skb->priority = HCI_PRIO_MAX - 1;
2433
2434 BT_DBG("chan %p skb %p promoted to %d", chan, skb,
2435 skb->priority);
2436 }
2437
2438 if (hci_conn_num(hdev, type) == num)
2439 break;
2440 }
2441
2442 rcu_read_unlock();
2443
2444 }
2445
2446 static inline int __get_blocks(struct hci_dev *hdev, struct sk_buff *skb)
2447 {
2448 /* Calculate count of blocks used by this packet */
2449 return DIV_ROUND_UP(skb->len - HCI_ACL_HDR_SIZE, hdev->block_len);
2450 }
2451
2452 static void __check_timeout(struct hci_dev *hdev, unsigned int cnt)
2453 {
2454 if (!test_bit(HCI_RAW, &hdev->flags)) {
2455 /* ACL tx timeout must be longer than maximum
2456 * link supervision timeout (40.9 seconds) */
2457 if (!cnt && time_after(jiffies, hdev->acl_last_tx +
2458 HCI_ACL_TX_TIMEOUT))
2459 hci_link_tx_to(hdev, ACL_LINK);
2460 }
2461 }
2462
2463 static void hci_sched_acl_pkt(struct hci_dev *hdev)
2464 {
2465 unsigned int cnt = hdev->acl_cnt;
2466 struct hci_chan *chan;
2467 struct sk_buff *skb;
2468 int quote;
2469
2470 __check_timeout(hdev, cnt);
2471
2472 while (hdev->acl_cnt &&
2473 (chan = hci_chan_sent(hdev, ACL_LINK, &quote))) {
2474 u32 priority = (skb_peek(&chan->data_q))->priority;
2475 while (quote-- && (skb = skb_peek(&chan->data_q))) {
2476 BT_DBG("chan %p skb %p len %d priority %u", chan, skb,
2477 skb->len, skb->priority);
2478
2479 /* Stop if priority has changed */
2480 if (skb->priority < priority)
2481 break;
2482
2483 skb = skb_dequeue(&chan->data_q);
2484
2485 hci_conn_enter_active_mode(chan->conn,
2486 bt_cb(skb)->force_active);
2487
2488 hci_send_frame(skb);
2489 hdev->acl_last_tx = jiffies;
2490
2491 hdev->acl_cnt--;
2492 chan->sent++;
2493 chan->conn->sent++;
2494 }
2495 }
2496
2497 if (cnt != hdev->acl_cnt)
2498 hci_prio_recalculate(hdev, ACL_LINK);
2499 }
2500
2501 static void hci_sched_acl_blk(struct hci_dev *hdev)
2502 {
2503 unsigned int cnt = hdev->block_cnt;
2504 struct hci_chan *chan;
2505 struct sk_buff *skb;
2506 int quote;
2507
2508 __check_timeout(hdev, cnt);
2509
2510 while (hdev->block_cnt > 0 &&
2511 (chan = hci_chan_sent(hdev, ACL_LINK, &quote))) {
2512 u32 priority = (skb_peek(&chan->data_q))->priority;
2513 while (quote > 0 && (skb = skb_peek(&chan->data_q))) {
2514 int blocks;
2515
2516 BT_DBG("chan %p skb %p len %d priority %u", chan, skb,
2517 skb->len, skb->priority);
2518
2519 /* Stop if priority has changed */
2520 if (skb->priority < priority)
2521 break;
2522
2523 skb = skb_dequeue(&chan->data_q);
2524
2525 blocks = __get_blocks(hdev, skb);
2526 if (blocks > hdev->block_cnt)
2527 return;
2528
2529 hci_conn_enter_active_mode(chan->conn,
2530 bt_cb(skb)->force_active);
2531
2532 hci_send_frame(skb);
2533 hdev->acl_last_tx = jiffies;
2534
2535 hdev->block_cnt -= blocks;
2536 quote -= blocks;
2537
2538 chan->sent += blocks;
2539 chan->conn->sent += blocks;
2540 }
2541 }
2542
2543 if (cnt != hdev->block_cnt)
2544 hci_prio_recalculate(hdev, ACL_LINK);
2545 }
2546
2547 static void hci_sched_acl(struct hci_dev *hdev)
2548 {
2549 BT_DBG("%s", hdev->name);
2550
2551 if (!hci_conn_num(hdev, ACL_LINK))
2552 return;
2553
2554 switch (hdev->flow_ctl_mode) {
2555 case HCI_FLOW_CTL_MODE_PACKET_BASED:
2556 hci_sched_acl_pkt(hdev);
2557 break;
2558
2559 case HCI_FLOW_CTL_MODE_BLOCK_BASED:
2560 hci_sched_acl_blk(hdev);
2561 break;
2562 }
2563 }
2564
2565 /* Schedule SCO */
2566 static void hci_sched_sco(struct hci_dev *hdev)
2567 {
2568 struct hci_conn *conn;
2569 struct sk_buff *skb;
2570 int quote;
2571
2572 BT_DBG("%s", hdev->name);
2573
2574 if (!hci_conn_num(hdev, SCO_LINK))
2575 return;
2576
2577 while (hdev->sco_cnt && (conn = hci_low_sent(hdev, SCO_LINK, &quote))) {
2578 while (quote-- && (skb = skb_dequeue(&conn->data_q))) {
2579 BT_DBG("skb %p len %d", skb, skb->len);
2580 hci_send_frame(skb);
2581
2582 conn->sent++;
2583 if (conn->sent == ~0)
2584 conn->sent = 0;
2585 }
2586 }
2587 }
2588
2589 static void hci_sched_esco(struct hci_dev *hdev)
2590 {
2591 struct hci_conn *conn;
2592 struct sk_buff *skb;
2593 int quote;
2594
2595 BT_DBG("%s", hdev->name);
2596
2597 if (!hci_conn_num(hdev, ESCO_LINK))
2598 return;
2599
2600 while (hdev->sco_cnt && (conn = hci_low_sent(hdev, ESCO_LINK,
2601 &quote))) {
2602 while (quote-- && (skb = skb_dequeue(&conn->data_q))) {
2603 BT_DBG("skb %p len %d", skb, skb->len);
2604 hci_send_frame(skb);
2605
2606 conn->sent++;
2607 if (conn->sent == ~0)
2608 conn->sent = 0;
2609 }
2610 }
2611 }
2612
2613 static void hci_sched_le(struct hci_dev *hdev)
2614 {
2615 struct hci_chan *chan;
2616 struct sk_buff *skb;
2617 int quote, cnt, tmp;
2618
2619 BT_DBG("%s", hdev->name);
2620
2621 if (!hci_conn_num(hdev, LE_LINK))
2622 return;
2623
2624 if (!test_bit(HCI_RAW, &hdev->flags)) {
2625 /* LE tx timeout must be longer than maximum
2626 * link supervision timeout (40.9 seconds) */
2627 if (!hdev->le_cnt && hdev->le_pkts &&
2628 time_after(jiffies, hdev->le_last_tx + HZ * 45))
2629 hci_link_tx_to(hdev, LE_LINK);
2630 }
2631
2632 cnt = hdev->le_pkts ? hdev->le_cnt : hdev->acl_cnt;
2633 tmp = cnt;
2634 while (cnt && (chan = hci_chan_sent(hdev, LE_LINK, &quote))) {
2635 u32 priority = (skb_peek(&chan->data_q))->priority;
2636 while (quote-- && (skb = skb_peek(&chan->data_q))) {
2637 BT_DBG("chan %p skb %p len %d priority %u", chan, skb,
2638 skb->len, skb->priority);
2639
2640 /* Stop if priority has changed */
2641 if (skb->priority < priority)
2642 break;
2643
2644 skb = skb_dequeue(&chan->data_q);
2645
2646 hci_send_frame(skb);
2647 hdev->le_last_tx = jiffies;
2648
2649 cnt--;
2650 chan->sent++;
2651 chan->conn->sent++;
2652 }
2653 }
2654
2655 if (hdev->le_pkts)
2656 hdev->le_cnt = cnt;
2657 else
2658 hdev->acl_cnt = cnt;
2659
2660 if (cnt != tmp)
2661 hci_prio_recalculate(hdev, LE_LINK);
2662 }
2663
2664 static void hci_tx_work(struct work_struct *work)
2665 {
2666 struct hci_dev *hdev = container_of(work, struct hci_dev, tx_work);
2667 struct sk_buff *skb;
2668
2669 BT_DBG("%s acl %d sco %d le %d", hdev->name, hdev->acl_cnt,
2670 hdev->sco_cnt, hdev->le_cnt);
2671
2672 /* Schedule queues and send stuff to HCI driver */
2673
2674 hci_sched_acl(hdev);
2675
2676 hci_sched_sco(hdev);
2677
2678 hci_sched_esco(hdev);
2679
2680 hci_sched_le(hdev);
2681
2682 /* Send next queued raw (unknown type) packet */
2683 while ((skb = skb_dequeue(&hdev->raw_q)))
2684 hci_send_frame(skb);
2685 }
2686
2687 /* ----- HCI RX task (incoming data processing) ----- */
2688
2689 /* ACL data packet */
2690 static void hci_acldata_packet(struct hci_dev *hdev, struct sk_buff *skb)
2691 {
2692 struct hci_acl_hdr *hdr = (void *) skb->data;
2693 struct hci_conn *conn;
2694 __u16 handle, flags;
2695
2696 skb_pull(skb, HCI_ACL_HDR_SIZE);
2697
2698 handle = __le16_to_cpu(hdr->handle);
2699 flags = hci_flags(handle);
2700 handle = hci_handle(handle);
2701
2702 BT_DBG("%s len %d handle 0x%4.4x flags 0x%4.4x", hdev->name, skb->len,
2703 handle, flags);
2704
2705 hdev->stat.acl_rx++;
2706
2707 hci_dev_lock(hdev);
2708 conn = hci_conn_hash_lookup_handle(hdev, handle);
2709 hci_dev_unlock(hdev);
2710
2711 if (conn) {
2712 hci_conn_enter_active_mode(conn, BT_POWER_FORCE_ACTIVE_OFF);
2713
2714 hci_dev_lock(hdev);
2715 if (test_bit(HCI_MGMT, &hdev->dev_flags) &&
2716 !test_and_set_bit(HCI_CONN_MGMT_CONNECTED, &conn->flags))
2717 mgmt_device_connected(hdev, &conn->dst, conn->type,
2718 conn->dst_type, 0, NULL, 0,
2719 conn->dev_class);
2720 hci_dev_unlock(hdev);
2721
2722 /* Send to upper protocol */
2723 l2cap_recv_acldata(conn, skb, flags);
2724 return;
2725 } else {
2726 BT_ERR("%s ACL packet for unknown connection handle %d",
2727 hdev->name, handle);
2728 }
2729
2730 kfree_skb(skb);
2731 }
2732
2733 /* SCO data packet */
2734 static void hci_scodata_packet(struct hci_dev *hdev, struct sk_buff *skb)
2735 {
2736 struct hci_sco_hdr *hdr = (void *) skb->data;
2737 struct hci_conn *conn;
2738 __u16 handle;
2739
2740 skb_pull(skb, HCI_SCO_HDR_SIZE);
2741
2742 handle = __le16_to_cpu(hdr->handle);
2743
2744 BT_DBG("%s len %d handle 0x%4.4x", hdev->name, skb->len, handle);
2745
2746 hdev->stat.sco_rx++;
2747
2748 hci_dev_lock(hdev);
2749 conn = hci_conn_hash_lookup_handle(hdev, handle);
2750 hci_dev_unlock(hdev);
2751
2752 if (conn) {
2753 /* Send to upper protocol */
2754 sco_recv_scodata(conn, skb);
2755 return;
2756 } else {
2757 BT_ERR("%s SCO packet for unknown connection handle %d",
2758 hdev->name, handle);
2759 }
2760
2761 kfree_skb(skb);
2762 }
2763
2764 static void hci_rx_work(struct work_struct *work)
2765 {
2766 struct hci_dev *hdev = container_of(work, struct hci_dev, rx_work);
2767 struct sk_buff *skb;
2768
2769 BT_DBG("%s", hdev->name);
2770
2771 while ((skb = skb_dequeue(&hdev->rx_q))) {
2772 /* Send copy to monitor */
2773 hci_send_to_monitor(hdev, skb);
2774
2775 if (atomic_read(&hdev->promisc)) {
2776 /* Send copy to the sockets */
2777 hci_send_to_sock(hdev, skb);
2778 }
2779
2780 if (test_bit(HCI_RAW, &hdev->flags)) {
2781 kfree_skb(skb);
2782 continue;
2783 }
2784
2785 if (test_bit(HCI_INIT, &hdev->flags)) {
2786 /* Don't process data packets in this states. */
2787 switch (bt_cb(skb)->pkt_type) {
2788 case HCI_ACLDATA_PKT:
2789 case HCI_SCODATA_PKT:
2790 kfree_skb(skb);
2791 continue;
2792 }
2793 }
2794
2795 /* Process frame */
2796 switch (bt_cb(skb)->pkt_type) {
2797 case HCI_EVENT_PKT:
2798 BT_DBG("%s Event packet", hdev->name);
2799 hci_event_packet(hdev, skb);
2800 break;
2801
2802 case HCI_ACLDATA_PKT:
2803 BT_DBG("%s ACL data packet", hdev->name);
2804 hci_acldata_packet(hdev, skb);
2805 break;
2806
2807 case HCI_SCODATA_PKT:
2808 BT_DBG("%s SCO data packet", hdev->name);
2809 hci_scodata_packet(hdev, skb);
2810 break;
2811
2812 default:
2813 kfree_skb(skb);
2814 break;
2815 }
2816 }
2817 }
2818
2819 static void hci_cmd_work(struct work_struct *work)
2820 {
2821 struct hci_dev *hdev = container_of(work, struct hci_dev, cmd_work);
2822 struct sk_buff *skb;
2823
2824 BT_DBG("%s cmd_cnt %d cmd queued %d", hdev->name,
2825 atomic_read(&hdev->cmd_cnt), skb_queue_len(&hdev->cmd_q));
2826
2827 /* Send queued commands */
2828 if (atomic_read(&hdev->cmd_cnt)) {
2829 skb = skb_dequeue(&hdev->cmd_q);
2830 if (!skb)
2831 return;
2832
2833 kfree_skb(hdev->sent_cmd);
2834
2835 hdev->sent_cmd = skb_clone(skb, GFP_ATOMIC);
2836 if (hdev->sent_cmd) {
2837 atomic_dec(&hdev->cmd_cnt);
2838 hci_send_frame(skb);
2839 if (test_bit(HCI_RESET, &hdev->flags))
2840 del_timer(&hdev->cmd_timer);
2841 else
2842 mod_timer(&hdev->cmd_timer,
2843 jiffies + HCI_CMD_TIMEOUT);
2844 } else {
2845 skb_queue_head(&hdev->cmd_q, skb);
2846 queue_work(hdev->workqueue, &hdev->cmd_work);
2847 }
2848 }
2849 }
2850
2851 int hci_do_inquiry(struct hci_dev *hdev, u8 length)
2852 {
2853 /* General inquiry access code (GIAC) */
2854 u8 lap[3] = { 0x33, 0x8b, 0x9e };
2855 struct hci_cp_inquiry cp;
2856
2857 BT_DBG("%s", hdev->name);
2858
2859 if (test_bit(HCI_INQUIRY, &hdev->flags))
2860 return -EINPROGRESS;
2861
2862 inquiry_cache_flush(hdev);
2863
2864 memset(&cp, 0, sizeof(cp));
2865 memcpy(&cp.lap, lap, sizeof(cp.lap));
2866 cp.length = length;
2867
2868 return hci_send_cmd(hdev, HCI_OP_INQUIRY, sizeof(cp), &cp);
2869 }
2870
2871 int hci_cancel_inquiry(struct hci_dev *hdev)
2872 {
2873 BT_DBG("%s", hdev->name);
2874
2875 if (!test_bit(HCI_INQUIRY, &hdev->flags))
2876 return -EALREADY;
2877
2878 return hci_send_cmd(hdev, HCI_OP_INQUIRY_CANCEL, 0, NULL);
2879 }
2880
2881 u8 bdaddr_to_le(u8 bdaddr_type)
2882 {
2883 switch (bdaddr_type) {
2884 case BDADDR_LE_PUBLIC:
2885 return ADDR_LE_DEV_PUBLIC;
2886
2887 default:
2888 /* Fallback to LE Random address type */
2889 return ADDR_LE_DEV_RANDOM;
2890 }
2891 }
(deprecated) Btrfs devel tree