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 | |
50 | static void hci_rx_work(struct work_struct *work); |
51 | static void hci_cmd_work(struct work_struct *work); |
52 | static void hci_tx_work(struct work_struct *work); |
53 | |
54 | /* HCI device list */ |
55 | LIST_HEAD(hci_dev_list); |
56 | DEFINE_RWLOCK(hci_dev_list_lock); |
57 | |
58 | /* HCI callback list */ |
59 | LIST_HEAD(hci_cb_list); |
60 | DEFINE_MUTEX(hci_cb_list_lock); |
61 | |
62 | /* HCI ID Numbering */ |
63 | static DEFINE_IDA(hci_index_ida); |
64 | |
65 | /* Get HCI device by index. |
66 | * Device is held on return. */ |
67 | struct hci_dev *hci_dev_get(int index) |
68 | { |
69 | struct hci_dev *hdev = NULL, *d; |
70 | |
71 | BT_DBG("%d", index); |
72 | |
73 | if (index < 0) |
74 | return NULL; |
75 | |
76 | read_lock(&hci_dev_list_lock); |
77 | list_for_each_entry(d, &hci_dev_list, list) { |
78 | if (d->id == index) { |
79 | hdev = hci_dev_hold(d); |
80 | break; |
81 | } |
82 | } |
83 | read_unlock(&hci_dev_list_lock); |
84 | return hdev; |
85 | } |
86 | |
87 | /* ---- Inquiry support ---- */ |
88 | |
89 | bool hci_discovery_active(struct hci_dev *hdev) |
90 | { |
91 | struct discovery_state *discov = &hdev->discovery; |
92 | |
93 | switch (discov->state) { |
94 | case DISCOVERY_FINDING: |
95 | case DISCOVERY_RESOLVING: |
96 | return true; |
97 | |
98 | default: |
99 | return false; |
100 | } |
101 | } |
102 | |
103 | void hci_discovery_set_state(struct hci_dev *hdev, int state) |
104 | { |
105 | int old_state = hdev->discovery.state; |
106 | |
107 | if (old_state == state) |
108 | return; |
109 | |
110 | hdev->discovery.state = state; |
111 | |
112 | switch (state) { |
113 | case DISCOVERY_STOPPED: |
114 | hci_update_passive_scan(hdev); |
115 | |
116 | if (old_state != DISCOVERY_STARTING) |
117 | mgmt_discovering(hdev, discovering: 0); |
118 | break; |
119 | case DISCOVERY_STARTING: |
120 | break; |
121 | case DISCOVERY_FINDING: |
122 | mgmt_discovering(hdev, discovering: 1); |
123 | break; |
124 | case DISCOVERY_RESOLVING: |
125 | break; |
126 | case DISCOVERY_STOPPING: |
127 | break; |
128 | } |
129 | |
130 | bt_dev_dbg(hdev, "state %u -> %u", old_state, state); |
131 | } |
132 | |
133 | void hci_inquiry_cache_flush(struct hci_dev *hdev) |
134 | { |
135 | struct discovery_state *cache = &hdev->discovery; |
136 | struct inquiry_entry *p, *n; |
137 | |
138 | list_for_each_entry_safe(p, n, &cache->all, all) { |
139 | list_del(entry: &p->all); |
140 | kfree(objp: p); |
141 | } |
142 | |
143 | INIT_LIST_HEAD(list: &cache->unknown); |
144 | INIT_LIST_HEAD(list: &cache->resolve); |
145 | } |
146 | |
147 | struct inquiry_entry *hci_inquiry_cache_lookup(struct hci_dev *hdev, |
148 | bdaddr_t *bdaddr) |
149 | { |
150 | struct discovery_state *cache = &hdev->discovery; |
151 | struct inquiry_entry *e; |
152 | |
153 | BT_DBG("cache %p, %pMR", cache, bdaddr); |
154 | |
155 | list_for_each_entry(e, &cache->all, all) { |
156 | if (!bacmp(ba1: &e->data.bdaddr, ba2: bdaddr)) |
157 | return e; |
158 | } |
159 | |
160 | return NULL; |
161 | } |
162 | |
163 | struct inquiry_entry *hci_inquiry_cache_lookup_unknown(struct hci_dev *hdev, |
164 | bdaddr_t *bdaddr) |
165 | { |
166 | struct discovery_state *cache = &hdev->discovery; |
167 | struct inquiry_entry *e; |
168 | |
169 | BT_DBG("cache %p, %pMR", cache, bdaddr); |
170 | |
171 | list_for_each_entry(e, &cache->unknown, list) { |
172 | if (!bacmp(ba1: &e->data.bdaddr, ba2: bdaddr)) |
173 | return e; |
174 | } |
175 | |
176 | return NULL; |
177 | } |
178 | |
179 | struct inquiry_entry *hci_inquiry_cache_lookup_resolve(struct hci_dev *hdev, |
180 | bdaddr_t *bdaddr, |
181 | int state) |
182 | { |
183 | struct discovery_state *cache = &hdev->discovery; |
184 | struct inquiry_entry *e; |
185 | |
186 | BT_DBG("cache %p bdaddr %pMR state %d", cache, bdaddr, state); |
187 | |
188 | list_for_each_entry(e, &cache->resolve, list) { |
189 | if (!bacmp(ba1: bdaddr, BDADDR_ANY) && e->name_state == state) |
190 | return e; |
191 | if (!bacmp(ba1: &e->data.bdaddr, ba2: bdaddr)) |
192 | return e; |
193 | } |
194 | |
195 | return NULL; |
196 | } |
197 | |
198 | void hci_inquiry_cache_update_resolve(struct hci_dev *hdev, |
199 | struct inquiry_entry *ie) |
200 | { |
201 | struct discovery_state *cache = &hdev->discovery; |
202 | struct list_head *pos = &cache->resolve; |
203 | struct inquiry_entry *p; |
204 | |
205 | list_del(entry: &ie->list); |
206 | |
207 | list_for_each_entry(p, &cache->resolve, list) { |
208 | if (p->name_state != NAME_PENDING && |
209 | abs(p->data.rssi) >= abs(ie->data.rssi)) |
210 | break; |
211 | pos = &p->list; |
212 | } |
213 | |
214 | list_add(new: &ie->list, head: pos); |
215 | } |
216 | |
217 | u32 hci_inquiry_cache_update(struct hci_dev *hdev, struct inquiry_data *data, |
218 | bool name_known) |
219 | { |
220 | struct discovery_state *cache = &hdev->discovery; |
221 | struct inquiry_entry *ie; |
222 | u32 flags = 0; |
223 | |
224 | BT_DBG("cache %p, %pMR", cache, &data->bdaddr); |
225 | |
226 | hci_remove_remote_oob_data(hdev, bdaddr: &data->bdaddr, BDADDR_BREDR); |
227 | |
228 | if (!data->ssp_mode) |
229 | flags |= MGMT_DEV_FOUND_LEGACY_PAIRING; |
230 | |
231 | ie = hci_inquiry_cache_lookup(hdev, bdaddr: &data->bdaddr); |
232 | if (ie) { |
233 | if (!ie->data.ssp_mode) |
234 | flags |= MGMT_DEV_FOUND_LEGACY_PAIRING; |
235 | |
236 | if (ie->name_state == NAME_NEEDED && |
237 | data->rssi != ie->data.rssi) { |
238 | ie->data.rssi = data->rssi; |
239 | hci_inquiry_cache_update_resolve(hdev, ie); |
240 | } |
241 | |
242 | goto update; |
243 | } |
244 | |
245 | /* Entry not in the cache. Add new one. */ |
246 | ie = kzalloc(sizeof(*ie), GFP_KERNEL); |
247 | if (!ie) { |
248 | flags |= MGMT_DEV_FOUND_CONFIRM_NAME; |
249 | goto done; |
250 | } |
251 | |
252 | list_add(new: &ie->all, head: &cache->all); |
253 | |
254 | if (name_known) { |
255 | ie->name_state = NAME_KNOWN; |
256 | } else { |
257 | ie->name_state = NAME_NOT_KNOWN; |
258 | list_add(new: &ie->list, head: &cache->unknown); |
259 | } |
260 | |
261 | update: |
262 | if (name_known && ie->name_state != NAME_KNOWN && |
263 | ie->name_state != NAME_PENDING) { |
264 | ie->name_state = NAME_KNOWN; |
265 | list_del(entry: &ie->list); |
266 | } |
267 | |
268 | memcpy(&ie->data, data, sizeof(*data)); |
269 | ie->timestamp = jiffies; |
270 | cache->timestamp = jiffies; |
271 | |
272 | if (ie->name_state == NAME_NOT_KNOWN) |
273 | flags |= MGMT_DEV_FOUND_CONFIRM_NAME; |
274 | |
275 | done: |
276 | return flags; |
277 | } |
278 | |
279 | static int inquiry_cache_dump(struct hci_dev *hdev, int num, __u8 *buf) |
280 | { |
281 | struct discovery_state *cache = &hdev->discovery; |
282 | struct inquiry_info *info = (struct inquiry_info *) buf; |
283 | struct inquiry_entry *e; |
284 | int copied = 0; |
285 | |
286 | list_for_each_entry(e, &cache->all, all) { |
287 | struct inquiry_data *data = &e->data; |
288 | |
289 | if (copied >= num) |
290 | break; |
291 | |
292 | bacpy(dst: &info->bdaddr, src: &data->bdaddr); |
293 | info->pscan_rep_mode = data->pscan_rep_mode; |
294 | info->pscan_period_mode = data->pscan_period_mode; |
295 | info->pscan_mode = data->pscan_mode; |
296 | memcpy(info->dev_class, data->dev_class, 3); |
297 | info->clock_offset = data->clock_offset; |
298 | |
299 | info++; |
300 | copied++; |
301 | } |
302 | |
303 | BT_DBG("cache %p, copied %d", cache, copied); |
304 | return copied; |
305 | } |
306 | |
307 | int hci_inquiry(void __user *arg) |
308 | { |
309 | __u8 __user *ptr = arg; |
310 | struct hci_inquiry_req ir; |
311 | struct hci_dev *hdev; |
312 | int err = 0, do_inquiry = 0, max_rsp; |
313 | __u8 *buf; |
314 | |
315 | if (copy_from_user(to: &ir, from: ptr, n: sizeof(ir))) |
316 | return -EFAULT; |
317 | |
318 | hdev = hci_dev_get(index: ir.dev_id); |
319 | if (!hdev) |
320 | return -ENODEV; |
321 | |
322 | if (hci_dev_test_flag(hdev, HCI_USER_CHANNEL)) { |
323 | err = -EBUSY; |
324 | goto done; |
325 | } |
326 | |
327 | if (hci_dev_test_flag(hdev, HCI_UNCONFIGURED)) { |
328 | err = -EOPNOTSUPP; |
329 | goto done; |
330 | } |
331 | |
332 | if (!hci_dev_test_flag(hdev, HCI_BREDR_ENABLED)) { |
333 | err = -EOPNOTSUPP; |
334 | goto done; |
335 | } |
336 | |
337 | /* Restrict maximum inquiry length to 60 seconds */ |
338 | if (ir.length > 60) { |
339 | err = -EINVAL; |
340 | goto done; |
341 | } |
342 | |
343 | hci_dev_lock(hdev); |
344 | if (inquiry_cache_age(hdev) > INQUIRY_CACHE_AGE_MAX || |
345 | inquiry_cache_empty(hdev) || ir.flags & IREQ_CACHE_FLUSH) { |
346 | hci_inquiry_cache_flush(hdev); |
347 | do_inquiry = 1; |
348 | } |
349 | hci_dev_unlock(hdev); |
350 | |
351 | if (do_inquiry) { |
352 | hci_req_sync_lock(hdev); |
353 | err = hci_inquiry_sync(hdev, length: ir.length, num_rsp: ir.num_rsp); |
354 | hci_req_sync_unlock(hdev); |
355 | |
356 | if (err < 0) |
357 | goto done; |
358 | |
359 | /* Wait until Inquiry procedure finishes (HCI_INQUIRY flag is |
360 | * cleared). If it is interrupted by a signal, return -EINTR. |
361 | */ |
362 | if (wait_on_bit(word: &hdev->flags, bit: HCI_INQUIRY, |
363 | TASK_INTERRUPTIBLE)) { |
364 | err = -EINTR; |
365 | goto done; |
366 | } |
367 | } |
368 | |
369 | /* for unlimited number of responses we will use buffer with |
370 | * 255 entries |
371 | */ |
372 | max_rsp = (ir.num_rsp == 0) ? 255 : ir.num_rsp; |
373 | |
374 | /* cache_dump can't sleep. Therefore we allocate temp buffer and then |
375 | * copy it to the user space. |
376 | */ |
377 | buf = kmalloc_array(max_rsp, sizeof(struct inquiry_info), GFP_KERNEL); |
378 | if (!buf) { |
379 | err = -ENOMEM; |
380 | goto done; |
381 | } |
382 | |
383 | hci_dev_lock(hdev); |
384 | ir.num_rsp = inquiry_cache_dump(hdev, num: max_rsp, buf); |
385 | hci_dev_unlock(hdev); |
386 | |
387 | BT_DBG("num_rsp %d", ir.num_rsp); |
388 | |
389 | if (!copy_to_user(to: ptr, from: &ir, n: sizeof(ir))) { |
390 | ptr += sizeof(ir); |
391 | if (copy_to_user(to: ptr, from: buf, n: sizeof(struct inquiry_info) * |
392 | ir.num_rsp)) |
393 | err = -EFAULT; |
394 | } else |
395 | err = -EFAULT; |
396 | |
397 | kfree(objp: buf); |
398 | |
399 | done: |
400 | hci_dev_put(d: hdev); |
401 | return err; |
402 | } |
403 | |
404 | static int hci_dev_do_open(struct hci_dev *hdev) |
405 | { |
406 | int ret = 0; |
407 | |
408 | BT_DBG("%s %p", hdev->name, hdev); |
409 | |
410 | hci_req_sync_lock(hdev); |
411 | |
412 | ret = hci_dev_open_sync(hdev); |
413 | |
414 | hci_req_sync_unlock(hdev); |
415 | return ret; |
416 | } |
417 | |
418 | /* ---- HCI ioctl helpers ---- */ |
419 | |
420 | int hci_dev_open(__u16 dev) |
421 | { |
422 | struct hci_dev *hdev; |
423 | int err; |
424 | |
425 | hdev = hci_dev_get(index: dev); |
426 | if (!hdev) |
427 | return -ENODEV; |
428 | |
429 | /* Devices that are marked as unconfigured can only be powered |
430 | * up as user channel. Trying to bring them up as normal devices |
431 | * will result into a failure. Only user channel operation is |
432 | * possible. |
433 | * |
434 | * When this function is called for a user channel, the flag |
435 | * HCI_USER_CHANNEL will be set first before attempting to |
436 | * open the device. |
437 | */ |
438 | if (hci_dev_test_flag(hdev, HCI_UNCONFIGURED) && |
439 | !hci_dev_test_flag(hdev, HCI_USER_CHANNEL)) { |
440 | err = -EOPNOTSUPP; |
441 | goto done; |
442 | } |
443 | |
444 | /* We need to ensure that no other power on/off work is pending |
445 | * before proceeding to call hci_dev_do_open. This is |
446 | * particularly important if the setup procedure has not yet |
447 | * completed. |
448 | */ |
449 | if (hci_dev_test_and_clear_flag(hdev, HCI_AUTO_OFF)) |
450 | cancel_delayed_work(dwork: &hdev->power_off); |
451 | |
452 | /* After this call it is guaranteed that the setup procedure |
453 | * has finished. This means that error conditions like RFKILL |
454 | * or no valid public or static random address apply. |
455 | */ |
456 | flush_workqueue(hdev->req_workqueue); |
457 | |
458 | /* For controllers not using the management interface and that |
459 | * are brought up using legacy ioctl, set the HCI_BONDABLE bit |
460 | * so that pairing works for them. Once the management interface |
461 | * is in use this bit will be cleared again and userspace has |
462 | * to explicitly enable it. |
463 | */ |
464 | if (!hci_dev_test_flag(hdev, HCI_USER_CHANNEL) && |
465 | !hci_dev_test_flag(hdev, HCI_MGMT)) |
466 | hci_dev_set_flag(hdev, HCI_BONDABLE); |
467 | |
468 | err = hci_dev_do_open(hdev); |
469 | |
470 | done: |
471 | hci_dev_put(d: hdev); |
472 | return err; |
473 | } |
474 | |
475 | int hci_dev_do_close(struct hci_dev *hdev) |
476 | { |
477 | int err; |
478 | |
479 | BT_DBG("%s %p", hdev->name, hdev); |
480 | |
481 | hci_req_sync_lock(hdev); |
482 | |
483 | err = hci_dev_close_sync(hdev); |
484 | |
485 | hci_req_sync_unlock(hdev); |
486 | |
487 | return err; |
488 | } |
489 | |
490 | int hci_dev_close(__u16 dev) |
491 | { |
492 | struct hci_dev *hdev; |
493 | int err; |
494 | |
495 | hdev = hci_dev_get(index: dev); |
496 | if (!hdev) |
497 | return -ENODEV; |
498 | |
499 | if (hci_dev_test_flag(hdev, HCI_USER_CHANNEL)) { |
500 | err = -EBUSY; |
501 | goto done; |
502 | } |
503 | |
504 | cancel_work_sync(work: &hdev->power_on); |
505 | if (hci_dev_test_and_clear_flag(hdev, HCI_AUTO_OFF)) |
506 | cancel_delayed_work(dwork: &hdev->power_off); |
507 | |
508 | err = hci_dev_do_close(hdev); |
509 | |
510 | done: |
511 | hci_dev_put(d: hdev); |
512 | return err; |
513 | } |
514 | |
515 | static int hci_dev_do_reset(struct hci_dev *hdev) |
516 | { |
517 | int ret; |
518 | |
519 | BT_DBG("%s %p", hdev->name, hdev); |
520 | |
521 | hci_req_sync_lock(hdev); |
522 | |
523 | /* Drop queues */ |
524 | skb_queue_purge(list: &hdev->rx_q); |
525 | skb_queue_purge(list: &hdev->cmd_q); |
526 | |
527 | /* Cancel these to avoid queueing non-chained pending work */ |
528 | hci_dev_set_flag(hdev, HCI_CMD_DRAIN_WORKQUEUE); |
529 | /* Wait for |
530 | * |
531 | * if (!hci_dev_test_flag(hdev, HCI_CMD_DRAIN_WORKQUEUE)) |
532 | * queue_delayed_work(&hdev->{cmd,ncmd}_timer) |
533 | * |
534 | * inside RCU section to see the flag or complete scheduling. |
535 | */ |
536 | synchronize_rcu(); |
537 | /* Explicitly cancel works in case scheduled after setting the flag. */ |
538 | cancel_delayed_work(dwork: &hdev->cmd_timer); |
539 | cancel_delayed_work(dwork: &hdev->ncmd_timer); |
540 | |
541 | /* Avoid potential lockdep warnings from the *_flush() calls by |
542 | * ensuring the workqueue is empty up front. |
543 | */ |
544 | drain_workqueue(wq: hdev->workqueue); |
545 | |
546 | hci_dev_lock(hdev); |
547 | hci_inquiry_cache_flush(hdev); |
548 | hci_conn_hash_flush(hdev); |
549 | hci_dev_unlock(hdev); |
550 | |
551 | if (hdev->flush) |
552 | hdev->flush(hdev); |
553 | |
554 | hci_dev_clear_flag(hdev, HCI_CMD_DRAIN_WORKQUEUE); |
555 | |
556 | atomic_set(v: &hdev->cmd_cnt, i: 1); |
557 | hdev->acl_cnt = 0; |
558 | hdev->sco_cnt = 0; |
559 | hdev->le_cnt = 0; |
560 | hdev->iso_cnt = 0; |
561 | |
562 | ret = hci_reset_sync(hdev); |
563 | |
564 | hci_req_sync_unlock(hdev); |
565 | return ret; |
566 | } |
567 | |
568 | int hci_dev_reset(__u16 dev) |
569 | { |
570 | struct hci_dev *hdev; |
571 | int err; |
572 | |
573 | hdev = hci_dev_get(index: dev); |
574 | if (!hdev) |
575 | return -ENODEV; |
576 | |
577 | if (!test_bit(HCI_UP, &hdev->flags)) { |
578 | err = -ENETDOWN; |
579 | goto done; |
580 | } |
581 | |
582 | if (hci_dev_test_flag(hdev, HCI_USER_CHANNEL)) { |
583 | err = -EBUSY; |
584 | goto done; |
585 | } |
586 | |
587 | if (hci_dev_test_flag(hdev, HCI_UNCONFIGURED)) { |
588 | err = -EOPNOTSUPP; |
589 | goto done; |
590 | } |
591 | |
592 | err = hci_dev_do_reset(hdev); |
593 | |
594 | done: |
595 | hci_dev_put(d: hdev); |
596 | return err; |
597 | } |
598 | |
599 | int hci_dev_reset_stat(__u16 dev) |
600 | { |
601 | struct hci_dev *hdev; |
602 | int ret = 0; |
603 | |
604 | hdev = hci_dev_get(index: dev); |
605 | if (!hdev) |
606 | return -ENODEV; |
607 | |
608 | if (hci_dev_test_flag(hdev, HCI_USER_CHANNEL)) { |
609 | ret = -EBUSY; |
610 | goto done; |
611 | } |
612 | |
613 | if (hci_dev_test_flag(hdev, HCI_UNCONFIGURED)) { |
614 | ret = -EOPNOTSUPP; |
615 | goto done; |
616 | } |
617 | |
618 | memset(&hdev->stat, 0, sizeof(struct hci_dev_stats)); |
619 | |
620 | done: |
621 | hci_dev_put(d: hdev); |
622 | return ret; |
623 | } |
624 | |
625 | static void hci_update_passive_scan_state(struct hci_dev *hdev, u8 scan) |
626 | { |
627 | bool conn_changed, discov_changed; |
628 | |
629 | BT_DBG("%s scan 0x%02x", hdev->name, scan); |
630 | |
631 | if ((scan & SCAN_PAGE)) |
632 | conn_changed = !hci_dev_test_and_set_flag(hdev, |
633 | HCI_CONNECTABLE); |
634 | else |
635 | conn_changed = hci_dev_test_and_clear_flag(hdev, |
636 | HCI_CONNECTABLE); |
637 | |
638 | if ((scan & SCAN_INQUIRY)) { |
639 | discov_changed = !hci_dev_test_and_set_flag(hdev, |
640 | HCI_DISCOVERABLE); |
641 | } else { |
642 | hci_dev_clear_flag(hdev, HCI_LIMITED_DISCOVERABLE); |
643 | discov_changed = hci_dev_test_and_clear_flag(hdev, |
644 | HCI_DISCOVERABLE); |
645 | } |
646 | |
647 | if (!hci_dev_test_flag(hdev, HCI_MGMT)) |
648 | return; |
649 | |
650 | if (conn_changed || discov_changed) { |
651 | /* In case this was disabled through mgmt */ |
652 | hci_dev_set_flag(hdev, HCI_BREDR_ENABLED); |
653 | |
654 | if (hci_dev_test_flag(hdev, HCI_LE_ENABLED)) |
655 | hci_update_adv_data(hdev, instance: hdev->cur_adv_instance); |
656 | |
657 | mgmt_new_settings(hdev); |
658 | } |
659 | } |
660 | |
661 | int hci_dev_cmd(unsigned int cmd, void __user *arg) |
662 | { |
663 | struct hci_dev *hdev; |
664 | struct hci_dev_req dr; |
665 | __le16 policy; |
666 | int err = 0; |
667 | |
668 | if (copy_from_user(to: &dr, from: arg, n: sizeof(dr))) |
669 | return -EFAULT; |
670 | |
671 | hdev = hci_dev_get(index: dr.dev_id); |
672 | if (!hdev) |
673 | return -ENODEV; |
674 | |
675 | if (hci_dev_test_flag(hdev, HCI_USER_CHANNEL)) { |
676 | err = -EBUSY; |
677 | goto done; |
678 | } |
679 | |
680 | if (hci_dev_test_flag(hdev, HCI_UNCONFIGURED)) { |
681 | err = -EOPNOTSUPP; |
682 | goto done; |
683 | } |
684 | |
685 | if (!hci_dev_test_flag(hdev, HCI_BREDR_ENABLED)) { |
686 | err = -EOPNOTSUPP; |
687 | goto done; |
688 | } |
689 | |
690 | switch (cmd) { |
691 | case HCISETAUTH: |
692 | err = hci_cmd_sync_status(hdev, HCI_OP_WRITE_AUTH_ENABLE, |
693 | plen: 1, param: &dr.dev_opt, HCI_CMD_TIMEOUT); |
694 | break; |
695 | |
696 | case HCISETENCRYPT: |
697 | if (!lmp_encrypt_capable(hdev)) { |
698 | err = -EOPNOTSUPP; |
699 | break; |
700 | } |
701 | |
702 | if (!test_bit(HCI_AUTH, &hdev->flags)) { |
703 | /* Auth must be enabled first */ |
704 | err = hci_cmd_sync_status(hdev, |
705 | HCI_OP_WRITE_AUTH_ENABLE, |
706 | plen: 1, param: &dr.dev_opt, |
707 | HCI_CMD_TIMEOUT); |
708 | if (err) |
709 | break; |
710 | } |
711 | |
712 | err = hci_cmd_sync_status(hdev, HCI_OP_WRITE_ENCRYPT_MODE, |
713 | plen: 1, param: &dr.dev_opt, HCI_CMD_TIMEOUT); |
714 | break; |
715 | |
716 | case HCISETSCAN: |
717 | err = hci_cmd_sync_status(hdev, HCI_OP_WRITE_SCAN_ENABLE, |
718 | plen: 1, param: &dr.dev_opt, HCI_CMD_TIMEOUT); |
719 | |
720 | /* Ensure that the connectable and discoverable states |
721 | * get correctly modified as this was a non-mgmt change. |
722 | */ |
723 | if (!err) |
724 | hci_update_passive_scan_state(hdev, scan: dr.dev_opt); |
725 | break; |
726 | |
727 | case HCISETLINKPOL: |
728 | policy = cpu_to_le16(dr.dev_opt); |
729 | |
730 | err = hci_cmd_sync_status(hdev, HCI_OP_WRITE_DEF_LINK_POLICY, |
731 | plen: 2, param: &policy, HCI_CMD_TIMEOUT); |
732 | break; |
733 | |
734 | case HCISETLINKMODE: |
735 | hdev->link_mode = ((__u16) dr.dev_opt) & |
736 | (HCI_LM_MASTER | HCI_LM_ACCEPT); |
737 | break; |
738 | |
739 | case HCISETPTYPE: |
740 | if (hdev->pkt_type == (__u16) dr.dev_opt) |
741 | break; |
742 | |
743 | hdev->pkt_type = (__u16) dr.dev_opt; |
744 | mgmt_phy_configuration_changed(hdev, NULL); |
745 | break; |
746 | |
747 | case HCISETACLMTU: |
748 | hdev->acl_mtu = *((__u16 *) &dr.dev_opt + 1); |
749 | hdev->acl_pkts = *((__u16 *) &dr.dev_opt + 0); |
750 | break; |
751 | |
752 | case HCISETSCOMTU: |
753 | hdev->sco_mtu = *((__u16 *) &dr.dev_opt + 1); |
754 | hdev->sco_pkts = *((__u16 *) &dr.dev_opt + 0); |
755 | break; |
756 | |
757 | default: |
758 | err = -EINVAL; |
759 | break; |
760 | } |
761 | |
762 | done: |
763 | hci_dev_put(d: hdev); |
764 | return err; |
765 | } |
766 | |
767 | int hci_get_dev_list(void __user *arg) |
768 | { |
769 | struct hci_dev *hdev; |
770 | struct hci_dev_list_req *dl; |
771 | struct hci_dev_req *dr; |
772 | int n = 0, err; |
773 | __u16 dev_num; |
774 | |
775 | if (get_user(dev_num, (__u16 __user *) arg)) |
776 | return -EFAULT; |
777 | |
778 | if (!dev_num || dev_num > (PAGE_SIZE * 2) / sizeof(*dr)) |
779 | return -EINVAL; |
780 | |
781 | dl = kzalloc(struct_size(dl, dev_req, dev_num), GFP_KERNEL); |
782 | if (!dl) |
783 | return -ENOMEM; |
784 | |
785 | dl->dev_num = dev_num; |
786 | dr = dl->dev_req; |
787 | |
788 | read_lock(&hci_dev_list_lock); |
789 | list_for_each_entry(hdev, &hci_dev_list, list) { |
790 | unsigned long flags = hdev->flags; |
791 | |
792 | /* When the auto-off is configured it means the transport |
793 | * is running, but in that case still indicate that the |
794 | * device is actually down. |
795 | */ |
796 | if (hci_dev_test_flag(hdev, HCI_AUTO_OFF)) |
797 | flags &= ~BIT(HCI_UP); |
798 | |
799 | dr[n].dev_id = hdev->id; |
800 | dr[n].dev_opt = flags; |
801 | |
802 | if (++n >= dev_num) |
803 | break; |
804 | } |
805 | read_unlock(&hci_dev_list_lock); |
806 | |
807 | dl->dev_num = n; |
808 | err = copy_to_user(to: arg, from: dl, struct_size(dl, dev_req, n)); |
809 | kfree(objp: dl); |
810 | |
811 | return err ? -EFAULT : 0; |
812 | } |
813 | |
814 | int hci_get_dev_info(void __user *arg) |
815 | { |
816 | struct hci_dev *hdev; |
817 | struct hci_dev_info di; |
818 | unsigned long flags; |
819 | int err = 0; |
820 | |
821 | if (copy_from_user(to: &di, from: arg, n: sizeof(di))) |
822 | return -EFAULT; |
823 | |
824 | hdev = hci_dev_get(index: di.dev_id); |
825 | if (!hdev) |
826 | return -ENODEV; |
827 | |
828 | /* When the auto-off is configured it means the transport |
829 | * is running, but in that case still indicate that the |
830 | * device is actually down. |
831 | */ |
832 | if (hci_dev_test_flag(hdev, HCI_AUTO_OFF)) |
833 | flags = hdev->flags & ~BIT(HCI_UP); |
834 | else |
835 | flags = hdev->flags; |
836 | |
837 | strscpy(di.name, hdev->name, sizeof(di.name)); |
838 | di.bdaddr = hdev->bdaddr; |
839 | di.type = (hdev->bus & 0x0f); |
840 | di.flags = flags; |
841 | di.pkt_type = hdev->pkt_type; |
842 | if (lmp_bredr_capable(hdev)) { |
843 | di.acl_mtu = hdev->acl_mtu; |
844 | di.acl_pkts = hdev->acl_pkts; |
845 | di.sco_mtu = hdev->sco_mtu; |
846 | di.sco_pkts = hdev->sco_pkts; |
847 | } else { |
848 | di.acl_mtu = hdev->le_mtu; |
849 | di.acl_pkts = hdev->le_pkts; |
850 | di.sco_mtu = 0; |
851 | di.sco_pkts = 0; |
852 | } |
853 | di.link_policy = hdev->link_policy; |
854 | di.link_mode = hdev->link_mode; |
855 | |
856 | memcpy(&di.stat, &hdev->stat, sizeof(di.stat)); |
857 | memcpy(&di.features, &hdev->features, sizeof(di.features)); |
858 | |
859 | if (copy_to_user(to: arg, from: &di, n: sizeof(di))) |
860 | err = -EFAULT; |
861 | |
862 | hci_dev_put(d: hdev); |
863 | |
864 | return err; |
865 | } |
866 | |
867 | /* ---- Interface to HCI drivers ---- */ |
868 | |
869 | static int hci_dev_do_poweroff(struct hci_dev *hdev) |
870 | { |
871 | int err; |
872 | |
873 | BT_DBG("%s %p", hdev->name, hdev); |
874 | |
875 | hci_req_sync_lock(hdev); |
876 | |
877 | err = hci_set_powered_sync(hdev, val: false); |
878 | |
879 | hci_req_sync_unlock(hdev); |
880 | |
881 | return err; |
882 | } |
883 | |
884 | static int hci_rfkill_set_block(void *data, bool blocked) |
885 | { |
886 | struct hci_dev *hdev = data; |
887 | int err; |
888 | |
889 | BT_DBG("%p name %s blocked %d", hdev, hdev->name, blocked); |
890 | |
891 | if (hci_dev_test_flag(hdev, HCI_USER_CHANNEL)) |
892 | return -EBUSY; |
893 | |
894 | if (blocked == hci_dev_test_flag(hdev, HCI_RFKILLED)) |
895 | return 0; |
896 | |
897 | if (blocked) { |
898 | hci_dev_set_flag(hdev, HCI_RFKILLED); |
899 | |
900 | if (!hci_dev_test_flag(hdev, HCI_SETUP) && |
901 | !hci_dev_test_flag(hdev, HCI_CONFIG)) { |
902 | err = hci_dev_do_poweroff(hdev); |
903 | if (err) { |
904 | bt_dev_err(hdev, "Error when powering off device on rfkill (%d)", |
905 | err); |
906 | |
907 | /* Make sure the device is still closed even if |
908 | * anything during power off sequence (eg. |
909 | * disconnecting devices) failed. |
910 | */ |
911 | hci_dev_do_close(hdev); |
912 | } |
913 | } |
914 | } else { |
915 | hci_dev_clear_flag(hdev, HCI_RFKILLED); |
916 | } |
917 | |
918 | return 0; |
919 | } |
920 | |
921 | static const struct rfkill_ops hci_rfkill_ops = { |
922 | .set_block = hci_rfkill_set_block, |
923 | }; |
924 | |
925 | static void hci_power_on(struct work_struct *work) |
926 | { |
927 | struct hci_dev *hdev = container_of(work, struct hci_dev, power_on); |
928 | int err; |
929 | |
930 | BT_DBG("%s", hdev->name); |
931 | |
932 | if (test_bit(HCI_UP, &hdev->flags) && |
933 | hci_dev_test_flag(hdev, HCI_MGMT) && |
934 | hci_dev_test_and_clear_flag(hdev, HCI_AUTO_OFF)) { |
935 | cancel_delayed_work(dwork: &hdev->power_off); |
936 | err = hci_powered_update_sync(hdev); |
937 | mgmt_power_on(hdev, err); |
938 | return; |
939 | } |
940 | |
941 | err = hci_dev_do_open(hdev); |
942 | if (err < 0) { |
943 | hci_dev_lock(hdev); |
944 | mgmt_set_powered_failed(hdev, err); |
945 | hci_dev_unlock(hdev); |
946 | return; |
947 | } |
948 | |
949 | /* During the HCI setup phase, a few error conditions are |
950 | * ignored and they need to be checked now. If they are still |
951 | * valid, it is important to turn the device back off. |
952 | */ |
953 | if (hci_dev_test_flag(hdev, HCI_RFKILLED) || |
954 | hci_dev_test_flag(hdev, HCI_UNCONFIGURED) || |
955 | (!bacmp(ba1: &hdev->bdaddr, BDADDR_ANY) && |
956 | !bacmp(ba1: &hdev->static_addr, BDADDR_ANY))) { |
957 | hci_dev_clear_flag(hdev, HCI_AUTO_OFF); |
958 | hci_dev_do_close(hdev); |
959 | } else if (hci_dev_test_flag(hdev, HCI_AUTO_OFF)) { |
960 | queue_delayed_work(wq: hdev->req_workqueue, dwork: &hdev->power_off, |
961 | HCI_AUTO_OFF_TIMEOUT); |
962 | } |
963 | |
964 | if (hci_dev_test_and_clear_flag(hdev, HCI_SETUP)) { |
965 | /* For unconfigured devices, set the HCI_RAW flag |
966 | * so that userspace can easily identify them. |
967 | */ |
968 | if (hci_dev_test_flag(hdev, HCI_UNCONFIGURED)) |
969 | set_bit(nr: HCI_RAW, addr: &hdev->flags); |
970 | |
971 | /* For fully configured devices, this will send |
972 | * the Index Added event. For unconfigured devices, |
973 | * it will send Unconfigued Index Added event. |
974 | * |
975 | * Devices with HCI_QUIRK_RAW_DEVICE are ignored |
976 | * and no event will be send. |
977 | */ |
978 | mgmt_index_added(hdev); |
979 | } else if (hci_dev_test_and_clear_flag(hdev, HCI_CONFIG)) { |
980 | /* When the controller is now configured, then it |
981 | * is important to clear the HCI_RAW flag. |
982 | */ |
983 | if (!hci_dev_test_flag(hdev, HCI_UNCONFIGURED)) |
984 | clear_bit(nr: HCI_RAW, addr: &hdev->flags); |
985 | |
986 | /* Powering on the controller with HCI_CONFIG set only |
987 | * happens with the transition from unconfigured to |
988 | * configured. This will send the Index Added event. |
989 | */ |
990 | mgmt_index_added(hdev); |
991 | } |
992 | } |
993 | |
994 | static void hci_power_off(struct work_struct *work) |
995 | { |
996 | struct hci_dev *hdev = container_of(work, struct hci_dev, |
997 | power_off.work); |
998 | |
999 | BT_DBG("%s", hdev->name); |
1000 | |
1001 | hci_dev_do_close(hdev); |
1002 | } |
1003 | |
1004 | static void hci_error_reset(struct work_struct *work) |
1005 | { |
1006 | struct hci_dev *hdev = container_of(work, struct hci_dev, error_reset); |
1007 | |
1008 | hci_dev_hold(d: hdev); |
1009 | BT_DBG("%s", hdev->name); |
1010 | |
1011 | if (hdev->hw_error) |
1012 | hdev->hw_error(hdev, hdev->hw_error_code); |
1013 | else |
1014 | bt_dev_err(hdev, "hardware error 0x%2.2x", hdev->hw_error_code); |
1015 | |
1016 | if (!hci_dev_do_close(hdev)) |
1017 | hci_dev_do_open(hdev); |
1018 | |
1019 | hci_dev_put(d: hdev); |
1020 | } |
1021 | |
1022 | void hci_uuids_clear(struct hci_dev *hdev) |
1023 | { |
1024 | struct bt_uuid *uuid, *tmp; |
1025 | |
1026 | list_for_each_entry_safe(uuid, tmp, &hdev->uuids, list) { |
1027 | list_del(entry: &uuid->list); |
1028 | kfree(objp: uuid); |
1029 | } |
1030 | } |
1031 | |
1032 | void hci_link_keys_clear(struct hci_dev *hdev) |
1033 | { |
1034 | struct link_key *key, *tmp; |
1035 | |
1036 | list_for_each_entry_safe(key, tmp, &hdev->link_keys, list) { |
1037 | list_del_rcu(entry: &key->list); |
1038 | kfree_rcu(key, rcu); |
1039 | } |
1040 | } |
1041 | |
1042 | void hci_smp_ltks_clear(struct hci_dev *hdev) |
1043 | { |
1044 | struct smp_ltk *k, *tmp; |
1045 | |
1046 | list_for_each_entry_safe(k, tmp, &hdev->long_term_keys, list) { |
1047 | list_del_rcu(entry: &k->list); |
1048 | kfree_rcu(k, rcu); |
1049 | } |
1050 | } |
1051 | |
1052 | void hci_smp_irks_clear(struct hci_dev *hdev) |
1053 | { |
1054 | struct smp_irk *k, *tmp; |
1055 | |
1056 | list_for_each_entry_safe(k, tmp, &hdev->identity_resolving_keys, list) { |
1057 | list_del_rcu(entry: &k->list); |
1058 | kfree_rcu(k, rcu); |
1059 | } |
1060 | } |
1061 | |
1062 | void hci_blocked_keys_clear(struct hci_dev *hdev) |
1063 | { |
1064 | struct blocked_key *b, *tmp; |
1065 | |
1066 | list_for_each_entry_safe(b, tmp, &hdev->blocked_keys, list) { |
1067 | list_del_rcu(entry: &b->list); |
1068 | kfree_rcu(b, rcu); |
1069 | } |
1070 | } |
1071 | |
1072 | bool hci_is_blocked_key(struct hci_dev *hdev, u8 type, u8 val[16]) |
1073 | { |
1074 | bool blocked = false; |
1075 | struct blocked_key *b; |
1076 | |
1077 | rcu_read_lock(); |
1078 | list_for_each_entry_rcu(b, &hdev->blocked_keys, list) { |
1079 | if (b->type == type && !memcmp(p: b->val, q: val, size: sizeof(b->val))) { |
1080 | blocked = true; |
1081 | break; |
1082 | } |
1083 | } |
1084 | |
1085 | rcu_read_unlock(); |
1086 | return blocked; |
1087 | } |
1088 | |
1089 | struct link_key *hci_find_link_key(struct hci_dev *hdev, bdaddr_t *bdaddr) |
1090 | { |
1091 | struct link_key *k; |
1092 | |
1093 | rcu_read_lock(); |
1094 | list_for_each_entry_rcu(k, &hdev->link_keys, list) { |
1095 | if (bacmp(ba1: bdaddr, ba2: &k->bdaddr) == 0) { |
1096 | rcu_read_unlock(); |
1097 | |
1098 | if (hci_is_blocked_key(hdev, |
1099 | HCI_BLOCKED_KEY_TYPE_LINKKEY, |
1100 | val: k->val)) { |
1101 | bt_dev_warn_ratelimited(hdev, |
1102 | "Link key blocked for %pMR", |
1103 | &k->bdaddr); |
1104 | return NULL; |
1105 | } |
1106 | |
1107 | return k; |
1108 | } |
1109 | } |
1110 | rcu_read_unlock(); |
1111 | |
1112 | return NULL; |
1113 | } |
1114 | |
1115 | static bool hci_persistent_key(struct hci_dev *hdev, struct hci_conn *conn, |
1116 | u8 key_type, u8 old_key_type) |
1117 | { |
1118 | /* Legacy key */ |
1119 | if (key_type < 0x03) |
1120 | return true; |
1121 | |
1122 | /* Debug keys are insecure so don't store them persistently */ |
1123 | if (key_type == HCI_LK_DEBUG_COMBINATION) |
1124 | return false; |
1125 | |
1126 | /* Changed combination key and there's no previous one */ |
1127 | if (key_type == HCI_LK_CHANGED_COMBINATION && old_key_type == 0xff) |
1128 | return false; |
1129 | |
1130 | /* Security mode 3 case */ |
1131 | if (!conn) |
1132 | return true; |
1133 | |
1134 | /* BR/EDR key derived using SC from an LE link */ |
1135 | if (conn->type == LE_LINK) |
1136 | return true; |
1137 | |
1138 | /* Neither local nor remote side had no-bonding as requirement */ |
1139 | if (conn->auth_type > 0x01 && conn->remote_auth > 0x01) |
1140 | return true; |
1141 | |
1142 | /* Local side had dedicated bonding as requirement */ |
1143 | if (conn->auth_type == 0x02 || conn->auth_type == 0x03) |
1144 | return true; |
1145 | |
1146 | /* Remote side had dedicated bonding as requirement */ |
1147 | if (conn->remote_auth == 0x02 || conn->remote_auth == 0x03) |
1148 | return true; |
1149 | |
1150 | /* If none of the above criteria match, then don't store the key |
1151 | * persistently */ |
1152 | return false; |
1153 | } |
1154 | |
1155 | static u8 ltk_role(u8 type) |
1156 | { |
1157 | if (type == SMP_LTK) |
1158 | return HCI_ROLE_MASTER; |
1159 | |
1160 | return HCI_ROLE_SLAVE; |
1161 | } |
1162 | |
1163 | struct smp_ltk *hci_find_ltk(struct hci_dev *hdev, bdaddr_t *bdaddr, |
1164 | u8 addr_type, u8 role) |
1165 | { |
1166 | struct smp_ltk *k; |
1167 | |
1168 | rcu_read_lock(); |
1169 | list_for_each_entry_rcu(k, &hdev->long_term_keys, list) { |
1170 | if (addr_type != k->bdaddr_type || bacmp(ba1: bdaddr, ba2: &k->bdaddr)) |
1171 | continue; |
1172 | |
1173 | if (smp_ltk_is_sc(key: k) || ltk_role(type: k->type) == role) { |
1174 | rcu_read_unlock(); |
1175 | |
1176 | if (hci_is_blocked_key(hdev, HCI_BLOCKED_KEY_TYPE_LTK, |
1177 | val: k->val)) { |
1178 | bt_dev_warn_ratelimited(hdev, |
1179 | "LTK blocked for %pMR", |
1180 | &k->bdaddr); |
1181 | return NULL; |
1182 | } |
1183 | |
1184 | return k; |
1185 | } |
1186 | } |
1187 | rcu_read_unlock(); |
1188 | |
1189 | return NULL; |
1190 | } |
1191 | |
1192 | struct smp_irk *hci_find_irk_by_rpa(struct hci_dev *hdev, bdaddr_t *rpa) |
1193 | { |
1194 | struct smp_irk *irk_to_return = NULL; |
1195 | struct smp_irk *irk; |
1196 | |
1197 | rcu_read_lock(); |
1198 | list_for_each_entry_rcu(irk, &hdev->identity_resolving_keys, list) { |
1199 | if (!bacmp(ba1: &irk->rpa, ba2: rpa)) { |
1200 | irk_to_return = irk; |
1201 | goto done; |
1202 | } |
1203 | } |
1204 | |
1205 | list_for_each_entry_rcu(irk, &hdev->identity_resolving_keys, list) { |
1206 | if (smp_irk_matches(hdev, irk: irk->val, bdaddr: rpa)) { |
1207 | bacpy(dst: &irk->rpa, src: rpa); |
1208 | irk_to_return = irk; |
1209 | goto done; |
1210 | } |
1211 | } |
1212 | |
1213 | done: |
1214 | if (irk_to_return && hci_is_blocked_key(hdev, HCI_BLOCKED_KEY_TYPE_IRK, |
1215 | val: irk_to_return->val)) { |
1216 | bt_dev_warn_ratelimited(hdev, "Identity key blocked for %pMR", |
1217 | &irk_to_return->bdaddr); |
1218 | irk_to_return = NULL; |
1219 | } |
1220 | |
1221 | rcu_read_unlock(); |
1222 | |
1223 | return irk_to_return; |
1224 | } |
1225 | |
1226 | struct smp_irk *hci_find_irk_by_addr(struct hci_dev *hdev, bdaddr_t *bdaddr, |
1227 | u8 addr_type) |
1228 | { |
1229 | struct smp_irk *irk_to_return = NULL; |
1230 | struct smp_irk *irk; |
1231 | |
1232 | /* Identity Address must be public or static random */ |
1233 | if (addr_type == ADDR_LE_DEV_RANDOM && (bdaddr->b[5] & 0xc0) != 0xc0) |
1234 | return NULL; |
1235 | |
1236 | rcu_read_lock(); |
1237 | list_for_each_entry_rcu(irk, &hdev->identity_resolving_keys, list) { |
1238 | if (addr_type == irk->addr_type && |
1239 | bacmp(ba1: bdaddr, ba2: &irk->bdaddr) == 0) { |
1240 | irk_to_return = irk; |
1241 | goto done; |
1242 | } |
1243 | } |
1244 | |
1245 | done: |
1246 | |
1247 | if (irk_to_return && hci_is_blocked_key(hdev, HCI_BLOCKED_KEY_TYPE_IRK, |
1248 | val: irk_to_return->val)) { |
1249 | bt_dev_warn_ratelimited(hdev, "Identity key blocked for %pMR", |
1250 | &irk_to_return->bdaddr); |
1251 | irk_to_return = NULL; |
1252 | } |
1253 | |
1254 | rcu_read_unlock(); |
1255 | |
1256 | return irk_to_return; |
1257 | } |
1258 | |
1259 | struct link_key *hci_add_link_key(struct hci_dev *hdev, struct hci_conn *conn, |
1260 | bdaddr_t *bdaddr, u8 *val, u8 type, |
1261 | u8 pin_len, bool *persistent) |
1262 | { |
1263 | struct link_key *key, *old_key; |
1264 | u8 old_key_type; |
1265 | |
1266 | old_key = hci_find_link_key(hdev, bdaddr); |
1267 | if (old_key) { |
1268 | old_key_type = old_key->type; |
1269 | key = old_key; |
1270 | } else { |
1271 | old_key_type = conn ? conn->key_type : 0xff; |
1272 | key = kzalloc(sizeof(*key), GFP_KERNEL); |
1273 | if (!key) |
1274 | return NULL; |
1275 | list_add_rcu(new: &key->list, head: &hdev->link_keys); |
1276 | } |
1277 | |
1278 | BT_DBG("%s key for %pMR type %u", hdev->name, bdaddr, type); |
1279 | |
1280 | /* Some buggy controller combinations generate a changed |
1281 | * combination key for legacy pairing even when there's no |
1282 | * previous key */ |
1283 | if (type == HCI_LK_CHANGED_COMBINATION && |
1284 | (!conn || conn->remote_auth == 0xff) && old_key_type == 0xff) { |
1285 | type = HCI_LK_COMBINATION; |
1286 | if (conn) |
1287 | conn->key_type = type; |
1288 | } |
1289 | |
1290 | bacpy(dst: &key->bdaddr, src: bdaddr); |
1291 | memcpy(key->val, val, HCI_LINK_KEY_SIZE); |
1292 | key->pin_len = pin_len; |
1293 | |
1294 | if (type == HCI_LK_CHANGED_COMBINATION) |
1295 | key->type = old_key_type; |
1296 | else |
1297 | key->type = type; |
1298 | |
1299 | if (persistent) |
1300 | *persistent = hci_persistent_key(hdev, conn, key_type: type, |
1301 | old_key_type); |
1302 | |
1303 | return key; |
1304 | } |
1305 | |
1306 | struct smp_ltk *hci_add_ltk(struct hci_dev *hdev, bdaddr_t *bdaddr, |
1307 | u8 addr_type, u8 type, u8 authenticated, |
1308 | u8 tk[16], u8 enc_size, __le16 ediv, __le64 rand) |
1309 | { |
1310 | struct smp_ltk *key, *old_key; |
1311 | u8 role = ltk_role(type); |
1312 | |
1313 | old_key = hci_find_ltk(hdev, bdaddr, addr_type, role); |
1314 | if (old_key) |
1315 | key = old_key; |
1316 | else { |
1317 | key = kzalloc(sizeof(*key), GFP_KERNEL); |
1318 | if (!key) |
1319 | return NULL; |
1320 | list_add_rcu(new: &key->list, head: &hdev->long_term_keys); |
1321 | } |
1322 | |
1323 | bacpy(dst: &key->bdaddr, src: bdaddr); |
1324 | key->bdaddr_type = addr_type; |
1325 | memcpy(key->val, tk, sizeof(key->val)); |
1326 | key->authenticated = authenticated; |
1327 | key->ediv = ediv; |
1328 | key->rand = rand; |
1329 | key->enc_size = enc_size; |
1330 | key->type = type; |
1331 | |
1332 | return key; |
1333 | } |
1334 | |
1335 | struct smp_irk *hci_add_irk(struct hci_dev *hdev, bdaddr_t *bdaddr, |
1336 | u8 addr_type, u8 val[16], bdaddr_t *rpa) |
1337 | { |
1338 | struct smp_irk *irk; |
1339 | |
1340 | irk = hci_find_irk_by_addr(hdev, bdaddr, addr_type); |
1341 | if (!irk) { |
1342 | irk = kzalloc(sizeof(*irk), GFP_KERNEL); |
1343 | if (!irk) |
1344 | return NULL; |
1345 | |
1346 | bacpy(dst: &irk->bdaddr, src: bdaddr); |
1347 | irk->addr_type = addr_type; |
1348 | |
1349 | list_add_rcu(new: &irk->list, head: &hdev->identity_resolving_keys); |
1350 | } |
1351 | |
1352 | memcpy(irk->val, val, 16); |
1353 | bacpy(dst: &irk->rpa, src: rpa); |
1354 | |
1355 | return irk; |
1356 | } |
1357 | |
1358 | int hci_remove_link_key(struct hci_dev *hdev, bdaddr_t *bdaddr) |
1359 | { |
1360 | struct link_key *key; |
1361 | |
1362 | key = hci_find_link_key(hdev, bdaddr); |
1363 | if (!key) |
1364 | return -ENOENT; |
1365 | |
1366 | BT_DBG("%s removing %pMR", hdev->name, bdaddr); |
1367 | |
1368 | list_del_rcu(entry: &key->list); |
1369 | kfree_rcu(key, rcu); |
1370 | |
1371 | return 0; |
1372 | } |
1373 | |
1374 | int hci_remove_ltk(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 bdaddr_type) |
1375 | { |
1376 | struct smp_ltk *k, *tmp; |
1377 | int removed = 0; |
1378 | |
1379 | list_for_each_entry_safe(k, tmp, &hdev->long_term_keys, list) { |
1380 | if (bacmp(ba1: bdaddr, ba2: &k->bdaddr) || k->bdaddr_type != bdaddr_type) |
1381 | continue; |
1382 | |
1383 | BT_DBG("%s removing %pMR", hdev->name, bdaddr); |
1384 | |
1385 | list_del_rcu(entry: &k->list); |
1386 | kfree_rcu(k, rcu); |
1387 | removed++; |
1388 | } |
1389 | |
1390 | return removed ? 0 : -ENOENT; |
1391 | } |
1392 | |
1393 | void hci_remove_irk(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 addr_type) |
1394 | { |
1395 | struct smp_irk *k, *tmp; |
1396 | |
1397 | list_for_each_entry_safe(k, tmp, &hdev->identity_resolving_keys, list) { |
1398 | if (bacmp(ba1: bdaddr, ba2: &k->bdaddr) || k->addr_type != addr_type) |
1399 | continue; |
1400 | |
1401 | BT_DBG("%s removing %pMR", hdev->name, bdaddr); |
1402 | |
1403 | list_del_rcu(entry: &k->list); |
1404 | kfree_rcu(k, rcu); |
1405 | } |
1406 | } |
1407 | |
1408 | bool hci_bdaddr_is_paired(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 type) |
1409 | { |
1410 | struct smp_ltk *k; |
1411 | struct smp_irk *irk; |
1412 | u8 addr_type; |
1413 | |
1414 | if (type == BDADDR_BREDR) { |
1415 | if (hci_find_link_key(hdev, bdaddr)) |
1416 | return true; |
1417 | return false; |
1418 | } |
1419 | |
1420 | /* Convert to HCI addr type which struct smp_ltk uses */ |
1421 | if (type == BDADDR_LE_PUBLIC) |
1422 | addr_type = ADDR_LE_DEV_PUBLIC; |
1423 | else |
1424 | addr_type = ADDR_LE_DEV_RANDOM; |
1425 | |
1426 | irk = hci_get_irk(hdev, bdaddr, addr_type); |
1427 | if (irk) { |
1428 | bdaddr = &irk->bdaddr; |
1429 | addr_type = irk->addr_type; |
1430 | } |
1431 | |
1432 | rcu_read_lock(); |
1433 | list_for_each_entry_rcu(k, &hdev->long_term_keys, list) { |
1434 | if (k->bdaddr_type == addr_type && !bacmp(ba1: bdaddr, ba2: &k->bdaddr)) { |
1435 | rcu_read_unlock(); |
1436 | return true; |
1437 | } |
1438 | } |
1439 | rcu_read_unlock(); |
1440 | |
1441 | return false; |
1442 | } |
1443 | |
1444 | /* HCI command timer function */ |
1445 | static void hci_cmd_timeout(struct work_struct *work) |
1446 | { |
1447 | struct hci_dev *hdev = container_of(work, struct hci_dev, |
1448 | cmd_timer.work); |
1449 | |
1450 | if (hdev->req_skb) { |
1451 | u16 opcode = hci_skb_opcode(hdev->req_skb); |
1452 | |
1453 | bt_dev_err(hdev, "command 0x%4.4x tx timeout", opcode); |
1454 | |
1455 | hci_cmd_sync_cancel_sync(hdev, ETIMEDOUT); |
1456 | } else { |
1457 | bt_dev_err(hdev, "command tx timeout"); |
1458 | } |
1459 | |
1460 | if (hdev->reset) |
1461 | hdev->reset(hdev); |
1462 | |
1463 | atomic_set(v: &hdev->cmd_cnt, i: 1); |
1464 | queue_work(wq: hdev->workqueue, work: &hdev->cmd_work); |
1465 | } |
1466 | |
1467 | /* HCI ncmd timer function */ |
1468 | static void hci_ncmd_timeout(struct work_struct *work) |
1469 | { |
1470 | struct hci_dev *hdev = container_of(work, struct hci_dev, |
1471 | ncmd_timer.work); |
1472 | |
1473 | bt_dev_err(hdev, "Controller not accepting commands anymore: ncmd = 0"); |
1474 | |
1475 | /* During HCI_INIT phase no events can be injected if the ncmd timer |
1476 | * triggers since the procedure has its own timeout handling. |
1477 | */ |
1478 | if (test_bit(HCI_INIT, &hdev->flags)) |
1479 | return; |
1480 | |
1481 | /* This is an irrecoverable state, inject hardware error event */ |
1482 | hci_reset_dev(hdev); |
1483 | } |
1484 | |
1485 | struct oob_data *hci_find_remote_oob_data(struct hci_dev *hdev, |
1486 | bdaddr_t *bdaddr, u8 bdaddr_type) |
1487 | { |
1488 | struct oob_data *data; |
1489 | |
1490 | list_for_each_entry(data, &hdev->remote_oob_data, list) { |
1491 | if (bacmp(ba1: bdaddr, ba2: &data->bdaddr) != 0) |
1492 | continue; |
1493 | if (data->bdaddr_type != bdaddr_type) |
1494 | continue; |
1495 | return data; |
1496 | } |
1497 | |
1498 | return NULL; |
1499 | } |
1500 | |
1501 | int hci_remove_remote_oob_data(struct hci_dev *hdev, bdaddr_t *bdaddr, |
1502 | u8 bdaddr_type) |
1503 | { |
1504 | struct oob_data *data; |
1505 | |
1506 | data = hci_find_remote_oob_data(hdev, bdaddr, bdaddr_type); |
1507 | if (!data) |
1508 | return -ENOENT; |
1509 | |
1510 | BT_DBG("%s removing %pMR (%u)", hdev->name, bdaddr, bdaddr_type); |
1511 | |
1512 | list_del(entry: &data->list); |
1513 | kfree(objp: data); |
1514 | |
1515 | return 0; |
1516 | } |
1517 | |
1518 | void hci_remote_oob_data_clear(struct hci_dev *hdev) |
1519 | { |
1520 | struct oob_data *data, *n; |
1521 | |
1522 | list_for_each_entry_safe(data, n, &hdev->remote_oob_data, list) { |
1523 | list_del(entry: &data->list); |
1524 | kfree(objp: data); |
1525 | } |
1526 | } |
1527 | |
1528 | int hci_add_remote_oob_data(struct hci_dev *hdev, bdaddr_t *bdaddr, |
1529 | u8 bdaddr_type, u8 *hash192, u8 *rand192, |
1530 | u8 *hash256, u8 *rand256) |
1531 | { |
1532 | struct oob_data *data; |
1533 | |
1534 | data = hci_find_remote_oob_data(hdev, bdaddr, bdaddr_type); |
1535 | if (!data) { |
1536 | data = kmalloc(sizeof(*data), GFP_KERNEL); |
1537 | if (!data) |
1538 | return -ENOMEM; |
1539 | |
1540 | bacpy(dst: &data->bdaddr, src: bdaddr); |
1541 | data->bdaddr_type = bdaddr_type; |
1542 | list_add(new: &data->list, head: &hdev->remote_oob_data); |
1543 | } |
1544 | |
1545 | if (hash192 && rand192) { |
1546 | memcpy(data->hash192, hash192, sizeof(data->hash192)); |
1547 | memcpy(data->rand192, rand192, sizeof(data->rand192)); |
1548 | if (hash256 && rand256) |
1549 | data->present = 0x03; |
1550 | } else { |
1551 | memset(data->hash192, 0, sizeof(data->hash192)); |
1552 | memset(data->rand192, 0, sizeof(data->rand192)); |
1553 | if (hash256 && rand256) |
1554 | data->present = 0x02; |
1555 | else |
1556 | data->present = 0x00; |
1557 | } |
1558 | |
1559 | if (hash256 && rand256) { |
1560 | memcpy(data->hash256, hash256, sizeof(data->hash256)); |
1561 | memcpy(data->rand256, rand256, sizeof(data->rand256)); |
1562 | } else { |
1563 | memset(data->hash256, 0, sizeof(data->hash256)); |
1564 | memset(data->rand256, 0, sizeof(data->rand256)); |
1565 | if (hash192 && rand192) |
1566 | data->present = 0x01; |
1567 | } |
1568 | |
1569 | BT_DBG("%s for %pMR", hdev->name, bdaddr); |
1570 | |
1571 | return 0; |
1572 | } |
1573 | |
1574 | /* This function requires the caller holds hdev->lock */ |
1575 | struct adv_info *hci_find_adv_instance(struct hci_dev *hdev, u8 instance) |
1576 | { |
1577 | struct adv_info *adv_instance; |
1578 | |
1579 | list_for_each_entry(adv_instance, &hdev->adv_instances, list) { |
1580 | if (adv_instance->instance == instance) |
1581 | return adv_instance; |
1582 | } |
1583 | |
1584 | return NULL; |
1585 | } |
1586 | |
1587 | /* This function requires the caller holds hdev->lock */ |
1588 | struct adv_info *hci_get_next_instance(struct hci_dev *hdev, u8 instance) |
1589 | { |
1590 | struct adv_info *cur_instance; |
1591 | |
1592 | cur_instance = hci_find_adv_instance(hdev, instance); |
1593 | if (!cur_instance) |
1594 | return NULL; |
1595 | |
1596 | if (cur_instance == list_last_entry(&hdev->adv_instances, |
1597 | struct adv_info, list)) |
1598 | return list_first_entry(&hdev->adv_instances, |
1599 | struct adv_info, list); |
1600 | else |
1601 | return list_next_entry(cur_instance, list); |
1602 | } |
1603 | |
1604 | /* This function requires the caller holds hdev->lock */ |
1605 | int hci_remove_adv_instance(struct hci_dev *hdev, u8 instance) |
1606 | { |
1607 | struct adv_info *adv_instance; |
1608 | |
1609 | adv_instance = hci_find_adv_instance(hdev, instance); |
1610 | if (!adv_instance) |
1611 | return -ENOENT; |
1612 | |
1613 | BT_DBG("%s removing %dMR", hdev->name, instance); |
1614 | |
1615 | if (hdev->cur_adv_instance == instance) { |
1616 | if (hdev->adv_instance_timeout) { |
1617 | cancel_delayed_work(dwork: &hdev->adv_instance_expire); |
1618 | hdev->adv_instance_timeout = 0; |
1619 | } |
1620 | hdev->cur_adv_instance = 0x00; |
1621 | } |
1622 | |
1623 | cancel_delayed_work_sync(dwork: &adv_instance->rpa_expired_cb); |
1624 | |
1625 | list_del(entry: &adv_instance->list); |
1626 | kfree(objp: adv_instance); |
1627 | |
1628 | hdev->adv_instance_cnt--; |
1629 | |
1630 | return 0; |
1631 | } |
1632 | |
1633 | void hci_adv_instances_set_rpa_expired(struct hci_dev *hdev, bool rpa_expired) |
1634 | { |
1635 | struct adv_info *adv_instance, *n; |
1636 | |
1637 | list_for_each_entry_safe(adv_instance, n, &hdev->adv_instances, list) |
1638 | adv_instance->rpa_expired = rpa_expired; |
1639 | } |
1640 | |
1641 | /* This function requires the caller holds hdev->lock */ |
1642 | void hci_adv_instances_clear(struct hci_dev *hdev) |
1643 | { |
1644 | struct adv_info *adv_instance, *n; |
1645 | |
1646 | if (hdev->adv_instance_timeout) { |
1647 | disable_delayed_work(dwork: &hdev->adv_instance_expire); |
1648 | hdev->adv_instance_timeout = 0; |
1649 | } |
1650 | |
1651 | list_for_each_entry_safe(adv_instance, n, &hdev->adv_instances, list) { |
1652 | disable_delayed_work_sync(dwork: &adv_instance->rpa_expired_cb); |
1653 | list_del(entry: &adv_instance->list); |
1654 | kfree(objp: adv_instance); |
1655 | } |
1656 | |
1657 | hdev->adv_instance_cnt = 0; |
1658 | hdev->cur_adv_instance = 0x00; |
1659 | } |
1660 | |
1661 | static void adv_instance_rpa_expired(struct work_struct *work) |
1662 | { |
1663 | struct adv_info *adv_instance = container_of(work, struct adv_info, |
1664 | rpa_expired_cb.work); |
1665 | |
1666 | BT_DBG(""); |
1667 | |
1668 | adv_instance->rpa_expired = true; |
1669 | } |
1670 | |
1671 | /* This function requires the caller holds hdev->lock */ |
1672 | struct adv_info *hci_add_adv_instance(struct hci_dev *hdev, u8 instance, |
1673 | u32 flags, u16 adv_data_len, u8 *adv_data, |
1674 | u16 scan_rsp_len, u8 *scan_rsp_data, |
1675 | u16 timeout, u16 duration, s8 tx_power, |
1676 | u32 min_interval, u32 max_interval, |
1677 | u8 mesh_handle) |
1678 | { |
1679 | struct adv_info *adv; |
1680 | |
1681 | adv = hci_find_adv_instance(hdev, instance); |
1682 | if (adv) { |
1683 | memset(adv->adv_data, 0, sizeof(adv->adv_data)); |
1684 | memset(adv->scan_rsp_data, 0, sizeof(adv->scan_rsp_data)); |
1685 | memset(adv->per_adv_data, 0, sizeof(adv->per_adv_data)); |
1686 | } else { |
1687 | if (hdev->adv_instance_cnt >= hdev->le_num_of_adv_sets || |
1688 | instance < 1 || instance > hdev->le_num_of_adv_sets + 1) |
1689 | return ERR_PTR(error: -EOVERFLOW); |
1690 | |
1691 | adv = kzalloc(sizeof(*adv), GFP_KERNEL); |
1692 | if (!adv) |
1693 | return ERR_PTR(error: -ENOMEM); |
1694 | |
1695 | adv->pending = true; |
1696 | adv->instance = instance; |
1697 | |
1698 | /* If controller support only one set and the instance is set to |
1699 | * 1 then there is no option other than using handle 0x00. |
1700 | */ |
1701 | if (hdev->le_num_of_adv_sets == 1 && instance == 1) |
1702 | adv->handle = 0x00; |
1703 | else |
1704 | adv->handle = instance; |
1705 | |
1706 | list_add(new: &adv->list, head: &hdev->adv_instances); |
1707 | hdev->adv_instance_cnt++; |
1708 | } |
1709 | |
1710 | adv->flags = flags; |
1711 | adv->min_interval = min_interval; |
1712 | adv->max_interval = max_interval; |
1713 | adv->tx_power = tx_power; |
1714 | /* Defining a mesh_handle changes the timing units to ms, |
1715 | * rather than seconds, and ties the instance to the requested |
1716 | * mesh_tx queue. |
1717 | */ |
1718 | adv->mesh = mesh_handle; |
1719 | |
1720 | hci_set_adv_instance_data(hdev, instance, adv_data_len, adv_data, |
1721 | scan_rsp_len, scan_rsp_data); |
1722 | |
1723 | adv->timeout = timeout; |
1724 | adv->remaining_time = timeout; |
1725 | |
1726 | if (duration == 0) |
1727 | adv->duration = hdev->def_multi_adv_rotation_duration; |
1728 | else |
1729 | adv->duration = duration; |
1730 | |
1731 | INIT_DELAYED_WORK(&adv->rpa_expired_cb, adv_instance_rpa_expired); |
1732 | |
1733 | BT_DBG("%s for %dMR", hdev->name, instance); |
1734 | |
1735 | return adv; |
1736 | } |
1737 | |
1738 | /* This function requires the caller holds hdev->lock */ |
1739 | struct adv_info *hci_add_per_instance(struct hci_dev *hdev, u8 instance, |
1740 | u32 flags, u8 data_len, u8 *data, |
1741 | u32 min_interval, u32 max_interval) |
1742 | { |
1743 | struct adv_info *adv; |
1744 | |
1745 | adv = hci_add_adv_instance(hdev, instance, flags, adv_data_len: 0, NULL, scan_rsp_len: 0, NULL, |
1746 | timeout: 0, duration: 0, HCI_ADV_TX_POWER_NO_PREFERENCE, |
1747 | min_interval, max_interval, mesh_handle: 0); |
1748 | if (IS_ERR(ptr: adv)) |
1749 | return adv; |
1750 | |
1751 | adv->periodic = true; |
1752 | adv->per_adv_data_len = data_len; |
1753 | |
1754 | if (data) |
1755 | memcpy(adv->per_adv_data, data, data_len); |
1756 | |
1757 | return adv; |
1758 | } |
1759 | |
1760 | /* This function requires the caller holds hdev->lock */ |
1761 | int hci_set_adv_instance_data(struct hci_dev *hdev, u8 instance, |
1762 | u16 adv_data_len, u8 *adv_data, |
1763 | u16 scan_rsp_len, u8 *scan_rsp_data) |
1764 | { |
1765 | struct adv_info *adv; |
1766 | |
1767 | adv = hci_find_adv_instance(hdev, instance); |
1768 | |
1769 | /* If advertisement doesn't exist, we can't modify its data */ |
1770 | if (!adv) |
1771 | return -ENOENT; |
1772 | |
1773 | if (adv_data_len && ADV_DATA_CMP(adv, adv_data, adv_data_len)) { |
1774 | memset(adv->adv_data, 0, sizeof(adv->adv_data)); |
1775 | memcpy(adv->adv_data, adv_data, adv_data_len); |
1776 | adv->adv_data_len = adv_data_len; |
1777 | adv->adv_data_changed = true; |
1778 | } |
1779 | |
1780 | if (scan_rsp_len && SCAN_RSP_CMP(adv, scan_rsp_data, scan_rsp_len)) { |
1781 | memset(adv->scan_rsp_data, 0, sizeof(adv->scan_rsp_data)); |
1782 | memcpy(adv->scan_rsp_data, scan_rsp_data, scan_rsp_len); |
1783 | adv->scan_rsp_len = scan_rsp_len; |
1784 | adv->scan_rsp_changed = true; |
1785 | } |
1786 | |
1787 | /* Mark as changed if there are flags which would affect it */ |
1788 | if (((adv->flags & MGMT_ADV_FLAG_APPEARANCE) && hdev->appearance) || |
1789 | adv->flags & MGMT_ADV_FLAG_LOCAL_NAME) |
1790 | adv->scan_rsp_changed = true; |
1791 | |
1792 | return 0; |
1793 | } |
1794 | |
1795 | /* This function requires the caller holds hdev->lock */ |
1796 | u32 hci_adv_instance_flags(struct hci_dev *hdev, u8 instance) |
1797 | { |
1798 | u32 flags; |
1799 | struct adv_info *adv; |
1800 | |
1801 | if (instance == 0x00) { |
1802 | /* Instance 0 always manages the "Tx Power" and "Flags" |
1803 | * fields |
1804 | */ |
1805 | flags = MGMT_ADV_FLAG_TX_POWER | MGMT_ADV_FLAG_MANAGED_FLAGS; |
1806 | |
1807 | /* For instance 0, the HCI_ADVERTISING_CONNECTABLE setting |
1808 | * corresponds to the "connectable" instance flag. |
1809 | */ |
1810 | if (hci_dev_test_flag(hdev, HCI_ADVERTISING_CONNECTABLE)) |
1811 | flags |= MGMT_ADV_FLAG_CONNECTABLE; |
1812 | |
1813 | if (hci_dev_test_flag(hdev, HCI_LIMITED_DISCOVERABLE)) |
1814 | flags |= MGMT_ADV_FLAG_LIMITED_DISCOV; |
1815 | else if (hci_dev_test_flag(hdev, HCI_DISCOVERABLE)) |
1816 | flags |= MGMT_ADV_FLAG_DISCOV; |
1817 | |
1818 | return flags; |
1819 | } |
1820 | |
1821 | adv = hci_find_adv_instance(hdev, instance); |
1822 | |
1823 | /* Return 0 when we got an invalid instance identifier. */ |
1824 | if (!adv) |
1825 | return 0; |
1826 | |
1827 | return adv->flags; |
1828 | } |
1829 | |
1830 | bool hci_adv_instance_is_scannable(struct hci_dev *hdev, u8 instance) |
1831 | { |
1832 | struct adv_info *adv; |
1833 | |
1834 | /* Instance 0x00 always set local name */ |
1835 | if (instance == 0x00) |
1836 | return true; |
1837 | |
1838 | adv = hci_find_adv_instance(hdev, instance); |
1839 | if (!adv) |
1840 | return false; |
1841 | |
1842 | if (adv->flags & MGMT_ADV_FLAG_APPEARANCE || |
1843 | adv->flags & MGMT_ADV_FLAG_LOCAL_NAME) |
1844 | return true; |
1845 | |
1846 | return adv->scan_rsp_len ? true : false; |
1847 | } |
1848 | |
1849 | /* This function requires the caller holds hdev->lock */ |
1850 | void hci_adv_monitors_clear(struct hci_dev *hdev) |
1851 | { |
1852 | struct adv_monitor *monitor; |
1853 | int handle; |
1854 | |
1855 | idr_for_each_entry(&hdev->adv_monitors_idr, monitor, handle) |
1856 | hci_free_adv_monitor(hdev, monitor); |
1857 | |
1858 | idr_destroy(&hdev->adv_monitors_idr); |
1859 | } |
1860 | |
1861 | /* Frees the monitor structure and do some bookkeepings. |
1862 | * This function requires the caller holds hdev->lock. |
1863 | */ |
1864 | void hci_free_adv_monitor(struct hci_dev *hdev, struct adv_monitor *monitor) |
1865 | { |
1866 | struct adv_pattern *pattern; |
1867 | struct adv_pattern *tmp; |
1868 | |
1869 | if (!monitor) |
1870 | return; |
1871 | |
1872 | list_for_each_entry_safe(pattern, tmp, &monitor->patterns, list) { |
1873 | list_del(entry: &pattern->list); |
1874 | kfree(objp: pattern); |
1875 | } |
1876 | |
1877 | if (monitor->handle) |
1878 | idr_remove(&hdev->adv_monitors_idr, id: monitor->handle); |
1879 | |
1880 | if (monitor->state != ADV_MONITOR_STATE_NOT_REGISTERED) { |
1881 | hdev->adv_monitors_cnt--; |
1882 | mgmt_adv_monitor_removed(hdev, handle: monitor->handle); |
1883 | } |
1884 | |
1885 | kfree(objp: monitor); |
1886 | } |
1887 | |
1888 | /* Assigns handle to a monitor, and if offloading is supported and power is on, |
1889 | * also attempts to forward the request to the controller. |
1890 | * This function requires the caller holds hci_req_sync_lock. |
1891 | */ |
1892 | int hci_add_adv_monitor(struct hci_dev *hdev, struct adv_monitor *monitor) |
1893 | { |
1894 | int min, max, handle; |
1895 | int status = 0; |
1896 | |
1897 | if (!monitor) |
1898 | return -EINVAL; |
1899 | |
1900 | hci_dev_lock(hdev); |
1901 | |
1902 | min = HCI_MIN_ADV_MONITOR_HANDLE; |
1903 | max = HCI_MIN_ADV_MONITOR_HANDLE + HCI_MAX_ADV_MONITOR_NUM_HANDLES; |
1904 | handle = idr_alloc(&hdev->adv_monitors_idr, ptr: monitor, start: min, end: max, |
1905 | GFP_KERNEL); |
1906 | |
1907 | hci_dev_unlock(hdev); |
1908 | |
1909 | if (handle < 0) |
1910 | return handle; |
1911 | |
1912 | monitor->handle = handle; |
1913 | |
1914 | if (!hdev_is_powered(hdev)) |
1915 | return status; |
1916 | |
1917 | switch (hci_get_adv_monitor_offload_ext(hdev)) { |
1918 | case HCI_ADV_MONITOR_EXT_NONE: |
1919 | bt_dev_dbg(hdev, "add monitor %d status %d", |
1920 | monitor->handle, status); |
1921 | /* Message was not forwarded to controller - not an error */ |
1922 | break; |
1923 | |
1924 | case HCI_ADV_MONITOR_EXT_MSFT: |
1925 | status = msft_add_monitor_pattern(hdev, monitor); |
1926 | bt_dev_dbg(hdev, "add monitor %d msft status %d", |
1927 | handle, status); |
1928 | break; |
1929 | } |
1930 | |
1931 | return status; |
1932 | } |
1933 | |
1934 | /* Attempts to tell the controller and free the monitor. If somehow the |
1935 | * controller doesn't have a corresponding handle, remove anyway. |
1936 | * This function requires the caller holds hci_req_sync_lock. |
1937 | */ |
1938 | static int hci_remove_adv_monitor(struct hci_dev *hdev, |
1939 | struct adv_monitor *monitor) |
1940 | { |
1941 | int status = 0; |
1942 | int handle; |
1943 | |
1944 | switch (hci_get_adv_monitor_offload_ext(hdev)) { |
1945 | case HCI_ADV_MONITOR_EXT_NONE: /* also goes here when powered off */ |
1946 | bt_dev_dbg(hdev, "remove monitor %d status %d", |
1947 | monitor->handle, status); |
1948 | goto free_monitor; |
1949 | |
1950 | case HCI_ADV_MONITOR_EXT_MSFT: |
1951 | handle = monitor->handle; |
1952 | status = msft_remove_monitor(hdev, monitor); |
1953 | bt_dev_dbg(hdev, "remove monitor %d msft status %d", |
1954 | handle, status); |
1955 | break; |
1956 | } |
1957 | |
1958 | /* In case no matching handle registered, just free the monitor */ |
1959 | if (status == -ENOENT) |
1960 | goto free_monitor; |
1961 | |
1962 | return status; |
1963 | |
1964 | free_monitor: |
1965 | if (status == -ENOENT) |
1966 | bt_dev_warn(hdev, "Removing monitor with no matching handle %d", |
1967 | monitor->handle); |
1968 | hci_free_adv_monitor(hdev, monitor); |
1969 | |
1970 | return status; |
1971 | } |
1972 | |
1973 | /* This function requires the caller holds hci_req_sync_lock */ |
1974 | int hci_remove_single_adv_monitor(struct hci_dev *hdev, u16 handle) |
1975 | { |
1976 | struct adv_monitor *monitor = idr_find(&hdev->adv_monitors_idr, id: handle); |
1977 | |
1978 | if (!monitor) |
1979 | return -EINVAL; |
1980 | |
1981 | return hci_remove_adv_monitor(hdev, monitor); |
1982 | } |
1983 | |
1984 | /* This function requires the caller holds hci_req_sync_lock */ |
1985 | int hci_remove_all_adv_monitor(struct hci_dev *hdev) |
1986 | { |
1987 | struct adv_monitor *monitor; |
1988 | int idr_next_id = 0; |
1989 | int status = 0; |
1990 | |
1991 | while (1) { |
1992 | monitor = idr_get_next(&hdev->adv_monitors_idr, nextid: &idr_next_id); |
1993 | if (!monitor) |
1994 | break; |
1995 | |
1996 | status = hci_remove_adv_monitor(hdev, monitor); |
1997 | if (status) |
1998 | return status; |
1999 | |
2000 | idr_next_id++; |
2001 | } |
2002 | |
2003 | return status; |
2004 | } |
2005 | |
2006 | /* This function requires the caller holds hdev->lock */ |
2007 | bool hci_is_adv_monitoring(struct hci_dev *hdev) |
2008 | { |
2009 | return !idr_is_empty(idr: &hdev->adv_monitors_idr); |
2010 | } |
2011 | |
2012 | int hci_get_adv_monitor_offload_ext(struct hci_dev *hdev) |
2013 | { |
2014 | if (msft_monitor_supported(hdev)) |
2015 | return HCI_ADV_MONITOR_EXT_MSFT; |
2016 | |
2017 | return HCI_ADV_MONITOR_EXT_NONE; |
2018 | } |
2019 | |
2020 | struct bdaddr_list *hci_bdaddr_list_lookup(struct list_head *bdaddr_list, |
2021 | bdaddr_t *bdaddr, u8 type) |
2022 | { |
2023 | struct bdaddr_list *b; |
2024 | |
2025 | list_for_each_entry(b, bdaddr_list, list) { |
2026 | if (!bacmp(ba1: &b->bdaddr, ba2: bdaddr) && b->bdaddr_type == type) |
2027 | return b; |
2028 | } |
2029 | |
2030 | return NULL; |
2031 | } |
2032 | |
2033 | struct bdaddr_list_with_irk *hci_bdaddr_list_lookup_with_irk( |
2034 | struct list_head *bdaddr_list, bdaddr_t *bdaddr, |
2035 | u8 type) |
2036 | { |
2037 | struct bdaddr_list_with_irk *b; |
2038 | |
2039 | list_for_each_entry(b, bdaddr_list, list) { |
2040 | if (!bacmp(ba1: &b->bdaddr, ba2: bdaddr) && b->bdaddr_type == type) |
2041 | return b; |
2042 | } |
2043 | |
2044 | return NULL; |
2045 | } |
2046 | |
2047 | struct bdaddr_list_with_flags * |
2048 | hci_bdaddr_list_lookup_with_flags(struct list_head *bdaddr_list, |
2049 | bdaddr_t *bdaddr, u8 type) |
2050 | { |
2051 | struct bdaddr_list_with_flags *b; |
2052 | |
2053 | list_for_each_entry(b, bdaddr_list, list) { |
2054 | if (!bacmp(ba1: &b->bdaddr, ba2: bdaddr) && b->bdaddr_type == type) |
2055 | return b; |
2056 | } |
2057 | |
2058 | return NULL; |
2059 | } |
2060 | |
2061 | void hci_bdaddr_list_clear(struct list_head *bdaddr_list) |
2062 | { |
2063 | struct bdaddr_list *b, *n; |
2064 | |
2065 | list_for_each_entry_safe(b, n, bdaddr_list, list) { |
2066 | list_del(entry: &b->list); |
2067 | kfree(objp: b); |
2068 | } |
2069 | } |
2070 | |
2071 | int hci_bdaddr_list_add(struct list_head *list, bdaddr_t *bdaddr, u8 type) |
2072 | { |
2073 | struct bdaddr_list *entry; |
2074 | |
2075 | if (!bacmp(ba1: bdaddr, BDADDR_ANY)) |
2076 | return -EBADF; |
2077 | |
2078 | if (hci_bdaddr_list_lookup(bdaddr_list: list, bdaddr, type)) |
2079 | return -EEXIST; |
2080 | |
2081 | entry = kzalloc(sizeof(*entry), GFP_KERNEL); |
2082 | if (!entry) |
2083 | return -ENOMEM; |
2084 | |
2085 | bacpy(dst: &entry->bdaddr, src: bdaddr); |
2086 | entry->bdaddr_type = type; |
2087 | |
2088 | list_add(new: &entry->list, head: list); |
2089 | |
2090 | return 0; |
2091 | } |
2092 | |
2093 | int hci_bdaddr_list_add_with_irk(struct list_head *list, bdaddr_t *bdaddr, |
2094 | u8 type, u8 *peer_irk, u8 *local_irk) |
2095 | { |
2096 | struct bdaddr_list_with_irk *entry; |
2097 | |
2098 | if (!bacmp(ba1: bdaddr, BDADDR_ANY)) |
2099 | return -EBADF; |
2100 | |
2101 | if (hci_bdaddr_list_lookup(bdaddr_list: list, bdaddr, type)) |
2102 | return -EEXIST; |
2103 | |
2104 | entry = kzalloc(sizeof(*entry), GFP_KERNEL); |
2105 | if (!entry) |
2106 | return -ENOMEM; |
2107 | |
2108 | bacpy(dst: &entry->bdaddr, src: bdaddr); |
2109 | entry->bdaddr_type = type; |
2110 | |
2111 | if (peer_irk) |
2112 | memcpy(entry->peer_irk, peer_irk, 16); |
2113 | |
2114 | if (local_irk) |
2115 | memcpy(entry->local_irk, local_irk, 16); |
2116 | |
2117 | list_add(new: &entry->list, head: list); |
2118 | |
2119 | return 0; |
2120 | } |
2121 | |
2122 | int hci_bdaddr_list_add_with_flags(struct list_head *list, bdaddr_t *bdaddr, |
2123 | u8 type, u32 flags) |
2124 | { |
2125 | struct bdaddr_list_with_flags *entry; |
2126 | |
2127 | if (!bacmp(ba1: bdaddr, BDADDR_ANY)) |
2128 | return -EBADF; |
2129 | |
2130 | if (hci_bdaddr_list_lookup(bdaddr_list: list, bdaddr, type)) |
2131 | return -EEXIST; |
2132 | |
2133 | entry = kzalloc(sizeof(*entry), GFP_KERNEL); |
2134 | if (!entry) |
2135 | return -ENOMEM; |
2136 | |
2137 | bacpy(dst: &entry->bdaddr, src: bdaddr); |
2138 | entry->bdaddr_type = type; |
2139 | entry->flags = flags; |
2140 | |
2141 | list_add(new: &entry->list, head: list); |
2142 | |
2143 | return 0; |
2144 | } |
2145 | |
2146 | int hci_bdaddr_list_del(struct list_head *list, bdaddr_t *bdaddr, u8 type) |
2147 | { |
2148 | struct bdaddr_list *entry; |
2149 | |
2150 | if (!bacmp(ba1: bdaddr, BDADDR_ANY)) { |
2151 | hci_bdaddr_list_clear(bdaddr_list: list); |
2152 | return 0; |
2153 | } |
2154 | |
2155 | entry = hci_bdaddr_list_lookup(bdaddr_list: list, bdaddr, type); |
2156 | if (!entry) |
2157 | return -ENOENT; |
2158 | |
2159 | list_del(entry: &entry->list); |
2160 | kfree(objp: entry); |
2161 | |
2162 | return 0; |
2163 | } |
2164 | |
2165 | int hci_bdaddr_list_del_with_irk(struct list_head *list, bdaddr_t *bdaddr, |
2166 | u8 type) |
2167 | { |
2168 | struct bdaddr_list_with_irk *entry; |
2169 | |
2170 | if (!bacmp(ba1: bdaddr, BDADDR_ANY)) { |
2171 | hci_bdaddr_list_clear(bdaddr_list: list); |
2172 | return 0; |
2173 | } |
2174 | |
2175 | entry = hci_bdaddr_list_lookup_with_irk(bdaddr_list: list, bdaddr, type); |
2176 | if (!entry) |
2177 | return -ENOENT; |
2178 | |
2179 | list_del(entry: &entry->list); |
2180 | kfree(objp: entry); |
2181 | |
2182 | return 0; |
2183 | } |
2184 | |
2185 | /* This function requires the caller holds hdev->lock */ |
2186 | struct hci_conn_params *hci_conn_params_lookup(struct hci_dev *hdev, |
2187 | bdaddr_t *addr, u8 addr_type) |
2188 | { |
2189 | struct hci_conn_params *params; |
2190 | |
2191 | list_for_each_entry(params, &hdev->le_conn_params, list) { |
2192 | if (bacmp(ba1: ¶ms->addr, ba2: addr) == 0 && |
2193 | params->addr_type == addr_type) { |
2194 | return params; |
2195 | } |
2196 | } |
2197 | |
2198 | return NULL; |
2199 | } |
2200 | |
2201 | /* This function requires the caller holds hdev->lock or rcu_read_lock */ |
2202 | struct hci_conn_params *hci_pend_le_action_lookup(struct list_head *list, |
2203 | bdaddr_t *addr, u8 addr_type) |
2204 | { |
2205 | struct hci_conn_params *param; |
2206 | |
2207 | rcu_read_lock(); |
2208 | |
2209 | list_for_each_entry_rcu(param, list, action) { |
2210 | if (bacmp(ba1: ¶m->addr, ba2: addr) == 0 && |
2211 | param->addr_type == addr_type) { |
2212 | rcu_read_unlock(); |
2213 | return param; |
2214 | } |
2215 | } |
2216 | |
2217 | rcu_read_unlock(); |
2218 | |
2219 | return NULL; |
2220 | } |
2221 | |
2222 | /* This function requires the caller holds hdev->lock */ |
2223 | void hci_pend_le_list_del_init(struct hci_conn_params *param) |
2224 | { |
2225 | if (list_empty(head: ¶m->action)) |
2226 | return; |
2227 | |
2228 | list_del_rcu(entry: ¶m->action); |
2229 | synchronize_rcu(); |
2230 | INIT_LIST_HEAD(list: ¶m->action); |
2231 | } |
2232 | |
2233 | /* This function requires the caller holds hdev->lock */ |
2234 | void hci_pend_le_list_add(struct hci_conn_params *param, |
2235 | struct list_head *list) |
2236 | { |
2237 | list_add_rcu(new: ¶m->action, head: list); |
2238 | } |
2239 | |
2240 | /* This function requires the caller holds hdev->lock */ |
2241 | struct hci_conn_params *hci_conn_params_add(struct hci_dev *hdev, |
2242 | bdaddr_t *addr, u8 addr_type) |
2243 | { |
2244 | struct hci_conn_params *params; |
2245 | |
2246 | params = hci_conn_params_lookup(hdev, addr, addr_type); |
2247 | if (params) |
2248 | return params; |
2249 | |
2250 | params = kzalloc(sizeof(*params), GFP_KERNEL); |
2251 | if (!params) { |
2252 | bt_dev_err(hdev, "out of memory"); |
2253 | return NULL; |
2254 | } |
2255 | |
2256 | bacpy(dst: ¶ms->addr, src: addr); |
2257 | params->addr_type = addr_type; |
2258 | |
2259 | list_add(new: ¶ms->list, head: &hdev->le_conn_params); |
2260 | INIT_LIST_HEAD(list: ¶ms->action); |
2261 | |
2262 | params->conn_min_interval = hdev->le_conn_min_interval; |
2263 | params->conn_max_interval = hdev->le_conn_max_interval; |
2264 | params->conn_latency = hdev->le_conn_latency; |
2265 | params->supervision_timeout = hdev->le_supv_timeout; |
2266 | params->auto_connect = HCI_AUTO_CONN_DISABLED; |
2267 | |
2268 | BT_DBG("addr %pMR (type %u)", addr, addr_type); |
2269 | |
2270 | return params; |
2271 | } |
2272 | |
2273 | void hci_conn_params_free(struct hci_conn_params *params) |
2274 | { |
2275 | hci_pend_le_list_del_init(param: params); |
2276 | |
2277 | if (params->conn) { |
2278 | hci_conn_drop(conn: params->conn); |
2279 | hci_conn_put(conn: params->conn); |
2280 | } |
2281 | |
2282 | list_del(entry: ¶ms->list); |
2283 | kfree(objp: params); |
2284 | } |
2285 | |
2286 | /* This function requires the caller holds hdev->lock */ |
2287 | void hci_conn_params_del(struct hci_dev *hdev, bdaddr_t *addr, u8 addr_type) |
2288 | { |
2289 | struct hci_conn_params *params; |
2290 | |
2291 | params = hci_conn_params_lookup(hdev, addr, addr_type); |
2292 | if (!params) |
2293 | return; |
2294 | |
2295 | hci_conn_params_free(params); |
2296 | |
2297 | hci_update_passive_scan(hdev); |
2298 | |
2299 | BT_DBG("addr %pMR (type %u)", addr, addr_type); |
2300 | } |
2301 | |
2302 | /* This function requires the caller holds hdev->lock */ |
2303 | void hci_conn_params_clear_disabled(struct hci_dev *hdev) |
2304 | { |
2305 | struct hci_conn_params *params, *tmp; |
2306 | |
2307 | list_for_each_entry_safe(params, tmp, &hdev->le_conn_params, list) { |
2308 | if (params->auto_connect != HCI_AUTO_CONN_DISABLED) |
2309 | continue; |
2310 | |
2311 | /* If trying to establish one time connection to disabled |
2312 | * device, leave the params, but mark them as just once. |
2313 | */ |
2314 | if (params->explicit_connect) { |
2315 | params->auto_connect = HCI_AUTO_CONN_EXPLICIT; |
2316 | continue; |
2317 | } |
2318 | |
2319 | hci_conn_params_free(params); |
2320 | } |
2321 | |
2322 | BT_DBG("All LE disabled connection parameters were removed"); |
2323 | } |
2324 | |
2325 | /* This function requires the caller holds hdev->lock */ |
2326 | static void hci_conn_params_clear_all(struct hci_dev *hdev) |
2327 | { |
2328 | struct hci_conn_params *params, *tmp; |
2329 | |
2330 | list_for_each_entry_safe(params, tmp, &hdev->le_conn_params, list) |
2331 | hci_conn_params_free(params); |
2332 | |
2333 | BT_DBG("All LE connection parameters were removed"); |
2334 | } |
2335 | |
2336 | /* Copy the Identity Address of the controller. |
2337 | * |
2338 | * If the controller has a public BD_ADDR, then by default use that one. |
2339 | * If this is a LE only controller without a public address, default to |
2340 | * the static random address. |
2341 | * |
2342 | * For debugging purposes it is possible to force controllers with a |
2343 | * public address to use the static random address instead. |
2344 | * |
2345 | * In case BR/EDR has been disabled on a dual-mode controller and |
2346 | * userspace has configured a static address, then that address |
2347 | * becomes the identity address instead of the public BR/EDR address. |
2348 | */ |
2349 | void hci_copy_identity_address(struct hci_dev *hdev, bdaddr_t *bdaddr, |
2350 | u8 *bdaddr_type) |
2351 | { |
2352 | if (hci_dev_test_flag(hdev, HCI_FORCE_STATIC_ADDR) || |
2353 | !bacmp(ba1: &hdev->bdaddr, BDADDR_ANY) || |
2354 | (!hci_dev_test_flag(hdev, HCI_BREDR_ENABLED) && |
2355 | bacmp(ba1: &hdev->static_addr, BDADDR_ANY))) { |
2356 | bacpy(dst: bdaddr, src: &hdev->static_addr); |
2357 | *bdaddr_type = ADDR_LE_DEV_RANDOM; |
2358 | } else { |
2359 | bacpy(dst: bdaddr, src: &hdev->bdaddr); |
2360 | *bdaddr_type = ADDR_LE_DEV_PUBLIC; |
2361 | } |
2362 | } |
2363 | |
2364 | static void hci_clear_wake_reason(struct hci_dev *hdev) |
2365 | { |
2366 | hci_dev_lock(hdev); |
2367 | |
2368 | hdev->wake_reason = 0; |
2369 | bacpy(dst: &hdev->wake_addr, BDADDR_ANY); |
2370 | hdev->wake_addr_type = 0; |
2371 | |
2372 | hci_dev_unlock(hdev); |
2373 | } |
2374 | |
2375 | static int hci_suspend_notifier(struct notifier_block *nb, unsigned long action, |
2376 | void *data) |
2377 | { |
2378 | struct hci_dev *hdev = |
2379 | container_of(nb, struct hci_dev, suspend_notifier); |
2380 | int ret = 0; |
2381 | |
2382 | /* Userspace has full control of this device. Do nothing. */ |
2383 | if (hci_dev_test_flag(hdev, HCI_USER_CHANNEL)) |
2384 | return NOTIFY_DONE; |
2385 | |
2386 | /* To avoid a potential race with hci_unregister_dev. */ |
2387 | hci_dev_hold(d: hdev); |
2388 | |
2389 | switch (action) { |
2390 | case PM_HIBERNATION_PREPARE: |
2391 | case PM_SUSPEND_PREPARE: |
2392 | ret = hci_suspend_dev(hdev); |
2393 | break; |
2394 | case PM_POST_HIBERNATION: |
2395 | case PM_POST_SUSPEND: |
2396 | ret = hci_resume_dev(hdev); |
2397 | break; |
2398 | } |
2399 | |
2400 | if (ret) |
2401 | bt_dev_err(hdev, "Suspend notifier action (%lu) failed: %d", |
2402 | action, ret); |
2403 | |
2404 | hci_dev_put(d: hdev); |
2405 | return NOTIFY_DONE; |
2406 | } |
2407 | |
2408 | /* Alloc HCI device */ |
2409 | struct hci_dev *hci_alloc_dev_priv(int sizeof_priv) |
2410 | { |
2411 | struct hci_dev *hdev; |
2412 | unsigned int alloc_size; |
2413 | |
2414 | alloc_size = sizeof(*hdev); |
2415 | if (sizeof_priv) { |
2416 | /* Fixme: May need ALIGN-ment? */ |
2417 | alloc_size += sizeof_priv; |
2418 | } |
2419 | |
2420 | hdev = kzalloc(alloc_size, GFP_KERNEL); |
2421 | if (!hdev) |
2422 | return NULL; |
2423 | |
2424 | hdev->pkt_type = (HCI_DM1 | HCI_DH1 | HCI_HV1); |
2425 | hdev->esco_type = (ESCO_HV1); |
2426 | hdev->link_mode = (HCI_LM_ACCEPT); |
2427 | hdev->num_iac = 0x01; /* One IAC support is mandatory */ |
2428 | hdev->io_capability = 0x03; /* No Input No Output */ |
2429 | hdev->manufacturer = 0xffff; /* Default to internal use */ |
2430 | hdev->inq_tx_power = HCI_TX_POWER_INVALID; |
2431 | hdev->adv_tx_power = HCI_TX_POWER_INVALID; |
2432 | hdev->adv_instance_cnt = 0; |
2433 | hdev->cur_adv_instance = 0x00; |
2434 | hdev->adv_instance_timeout = 0; |
2435 | |
2436 | hdev->advmon_allowlist_duration = 300; |
2437 | hdev->advmon_no_filter_duration = 500; |
2438 | hdev->enable_advmon_interleave_scan = 0x00; /* Default to disable */ |
2439 | |
2440 | hdev->sniff_max_interval = 800; |
2441 | hdev->sniff_min_interval = 80; |
2442 | |
2443 | hdev->le_adv_channel_map = 0x07; |
2444 | hdev->le_adv_min_interval = 0x0800; |
2445 | hdev->le_adv_max_interval = 0x0800; |
2446 | hdev->le_scan_interval = DISCOV_LE_SCAN_INT_FAST; |
2447 | hdev->le_scan_window = DISCOV_LE_SCAN_WIN_FAST; |
2448 | hdev->le_scan_int_suspend = DISCOV_LE_SCAN_INT_SLOW1; |
2449 | hdev->le_scan_window_suspend = DISCOV_LE_SCAN_WIN_SLOW1; |
2450 | hdev->le_scan_int_discovery = DISCOV_LE_SCAN_INT; |
2451 | hdev->le_scan_window_discovery = DISCOV_LE_SCAN_WIN; |
2452 | hdev->le_scan_int_adv_monitor = DISCOV_LE_SCAN_INT_FAST; |
2453 | hdev->le_scan_window_adv_monitor = DISCOV_LE_SCAN_WIN_FAST; |
2454 | hdev->le_scan_int_connect = DISCOV_LE_SCAN_INT_CONN; |
2455 | hdev->le_scan_window_connect = DISCOV_LE_SCAN_WIN_CONN; |
2456 | hdev->le_conn_min_interval = 0x0018; |
2457 | hdev->le_conn_max_interval = 0x0028; |
2458 | hdev->le_conn_latency = 0x0000; |
2459 | hdev->le_supv_timeout = 0x002a; |
2460 | hdev->le_def_tx_len = 0x001b; |
2461 | hdev->le_def_tx_time = 0x0148; |
2462 | hdev->le_max_tx_len = 0x001b; |
2463 | hdev->le_max_tx_time = 0x0148; |
2464 | hdev->le_max_rx_len = 0x001b; |
2465 | hdev->le_max_rx_time = 0x0148; |
2466 | hdev->le_max_key_size = SMP_MAX_ENC_KEY_SIZE; |
2467 | hdev->le_min_key_size = SMP_MIN_ENC_KEY_SIZE; |
2468 | hdev->le_tx_def_phys = HCI_LE_SET_PHY_1M; |
2469 | hdev->le_rx_def_phys = HCI_LE_SET_PHY_1M; |
2470 | hdev->le_num_of_adv_sets = HCI_MAX_ADV_INSTANCES; |
2471 | hdev->def_multi_adv_rotation_duration = HCI_DEFAULT_ADV_DURATION; |
2472 | hdev->def_le_autoconnect_timeout = HCI_LE_CONN_TIMEOUT; |
2473 | hdev->min_le_tx_power = HCI_TX_POWER_INVALID; |
2474 | hdev->max_le_tx_power = HCI_TX_POWER_INVALID; |
2475 | |
2476 | hdev->rpa_timeout = HCI_DEFAULT_RPA_TIMEOUT; |
2477 | hdev->discov_interleaved_timeout = DISCOV_INTERLEAVED_TIMEOUT; |
2478 | hdev->conn_info_min_age = DEFAULT_CONN_INFO_MIN_AGE; |
2479 | hdev->conn_info_max_age = DEFAULT_CONN_INFO_MAX_AGE; |
2480 | hdev->auth_payload_timeout = DEFAULT_AUTH_PAYLOAD_TIMEOUT; |
2481 | hdev->min_enc_key_size = HCI_MIN_ENC_KEY_SIZE; |
2482 | |
2483 | /* default 1.28 sec page scan */ |
2484 | hdev->def_page_scan_type = PAGE_SCAN_TYPE_STANDARD; |
2485 | hdev->def_page_scan_int = 0x0800; |
2486 | hdev->def_page_scan_window = 0x0012; |
2487 | |
2488 | mutex_init(&hdev->lock); |
2489 | mutex_init(&hdev->req_lock); |
2490 | |
2491 | ida_init(ida: &hdev->unset_handle_ida); |
2492 | |
2493 | INIT_LIST_HEAD(list: &hdev->mesh_pending); |
2494 | INIT_LIST_HEAD(list: &hdev->mgmt_pending); |
2495 | INIT_LIST_HEAD(list: &hdev->reject_list); |
2496 | INIT_LIST_HEAD(list: &hdev->accept_list); |
2497 | INIT_LIST_HEAD(list: &hdev->uuids); |
2498 | INIT_LIST_HEAD(list: &hdev->link_keys); |
2499 | INIT_LIST_HEAD(list: &hdev->long_term_keys); |
2500 | INIT_LIST_HEAD(list: &hdev->identity_resolving_keys); |
2501 | INIT_LIST_HEAD(list: &hdev->remote_oob_data); |
2502 | INIT_LIST_HEAD(list: &hdev->le_accept_list); |
2503 | INIT_LIST_HEAD(list: &hdev->le_resolv_list); |
2504 | INIT_LIST_HEAD(list: &hdev->le_conn_params); |
2505 | INIT_LIST_HEAD(list: &hdev->pend_le_conns); |
2506 | INIT_LIST_HEAD(list: &hdev->pend_le_reports); |
2507 | INIT_LIST_HEAD(list: &hdev->conn_hash.list); |
2508 | INIT_LIST_HEAD(list: &hdev->adv_instances); |
2509 | INIT_LIST_HEAD(list: &hdev->blocked_keys); |
2510 | INIT_LIST_HEAD(list: &hdev->monitored_devices); |
2511 | |
2512 | INIT_LIST_HEAD(list: &hdev->local_codecs); |
2513 | INIT_WORK(&hdev->rx_work, hci_rx_work); |
2514 | INIT_WORK(&hdev->cmd_work, hci_cmd_work); |
2515 | INIT_WORK(&hdev->tx_work, hci_tx_work); |
2516 | INIT_WORK(&hdev->power_on, hci_power_on); |
2517 | INIT_WORK(&hdev->error_reset, hci_error_reset); |
2518 | |
2519 | hci_cmd_sync_init(hdev); |
2520 | |
2521 | INIT_DELAYED_WORK(&hdev->power_off, hci_power_off); |
2522 | |
2523 | skb_queue_head_init(list: &hdev->rx_q); |
2524 | skb_queue_head_init(list: &hdev->cmd_q); |
2525 | skb_queue_head_init(list: &hdev->raw_q); |
2526 | |
2527 | init_waitqueue_head(&hdev->req_wait_q); |
2528 | |
2529 | INIT_DELAYED_WORK(&hdev->cmd_timer, hci_cmd_timeout); |
2530 | INIT_DELAYED_WORK(&hdev->ncmd_timer, hci_ncmd_timeout); |
2531 | |
2532 | hci_devcd_setup(hdev); |
2533 | |
2534 | hci_init_sysfs(hdev); |
2535 | discovery_init(hdev); |
2536 | |
2537 | return hdev; |
2538 | } |
2539 | EXPORT_SYMBOL(hci_alloc_dev_priv); |
2540 | |
2541 | /* Free HCI device */ |
2542 | void hci_free_dev(struct hci_dev *hdev) |
2543 | { |
2544 | /* will free via device release */ |
2545 | put_device(dev: &hdev->dev); |
2546 | } |
2547 | EXPORT_SYMBOL(hci_free_dev); |
2548 | |
2549 | /* Register HCI device */ |
2550 | int hci_register_dev(struct hci_dev *hdev) |
2551 | { |
2552 | int id, error; |
2553 | |
2554 | if (!hdev->open || !hdev->close || !hdev->send) |
2555 | return -EINVAL; |
2556 | |
2557 | id = ida_alloc_max(ida: &hci_index_ida, HCI_MAX_ID - 1, GFP_KERNEL); |
2558 | if (id < 0) |
2559 | return id; |
2560 | |
2561 | error = dev_set_name(dev: &hdev->dev, name: "hci%u", id); |
2562 | if (error) |
2563 | return error; |
2564 | |
2565 | hdev->name = dev_name(dev: &hdev->dev); |
2566 | hdev->id = id; |
2567 | |
2568 | BT_DBG("%p name %s bus %d", hdev, hdev->name, hdev->bus); |
2569 | |
2570 | hdev->workqueue = alloc_ordered_workqueue("%s", WQ_HIGHPRI, hdev->name); |
2571 | if (!hdev->workqueue) { |
2572 | error = -ENOMEM; |
2573 | goto err; |
2574 | } |
2575 | |
2576 | hdev->req_workqueue = alloc_ordered_workqueue("%s", WQ_HIGHPRI, |
2577 | hdev->name); |
2578 | if (!hdev->req_workqueue) { |
2579 | destroy_workqueue(wq: hdev->workqueue); |
2580 | error = -ENOMEM; |
2581 | goto err; |
2582 | } |
2583 | |
2584 | if (!IS_ERR_OR_NULL(ptr: bt_debugfs)) |
2585 | hdev->debugfs = debugfs_create_dir(name: hdev->name, parent: bt_debugfs); |
2586 | |
2587 | error = device_add(dev: &hdev->dev); |
2588 | if (error < 0) |
2589 | goto err_wqueue; |
2590 | |
2591 | hci_leds_init(hdev); |
2592 | |
2593 | hdev->rfkill = rfkill_alloc(name: hdev->name, parent: &hdev->dev, |
2594 | type: RFKILL_TYPE_BLUETOOTH, ops: &hci_rfkill_ops, |
2595 | ops_data: hdev); |
2596 | if (hdev->rfkill) { |
2597 | if (rfkill_register(rfkill: hdev->rfkill) < 0) { |
2598 | rfkill_destroy(rfkill: hdev->rfkill); |
2599 | hdev->rfkill = NULL; |
2600 | } |
2601 | } |
2602 | |
2603 | if (hdev->rfkill && rfkill_blocked(rfkill: hdev->rfkill)) |
2604 | hci_dev_set_flag(hdev, HCI_RFKILLED); |
2605 | |
2606 | hci_dev_set_flag(hdev, HCI_SETUP); |
2607 | hci_dev_set_flag(hdev, HCI_AUTO_OFF); |
2608 | |
2609 | /* Assume BR/EDR support until proven otherwise (such as |
2610 | * through reading supported features during init. |
2611 | */ |
2612 | hci_dev_set_flag(hdev, HCI_BREDR_ENABLED); |
2613 | |
2614 | write_lock(&hci_dev_list_lock); |
2615 | list_add(new: &hdev->list, head: &hci_dev_list); |
2616 | write_unlock(&hci_dev_list_lock); |
2617 | |
2618 | /* Devices that are marked for raw-only usage are unconfigured |
2619 | * and should not be included in normal operation. |
2620 | */ |
2621 | if (test_bit(HCI_QUIRK_RAW_DEVICE, &hdev->quirks)) |
2622 | hci_dev_set_flag(hdev, HCI_UNCONFIGURED); |
2623 | |
2624 | /* Mark Remote Wakeup connection flag as supported if driver has wakeup |
2625 | * callback. |
2626 | */ |
2627 | if (hdev->wakeup) |
2628 | hdev->conn_flags |= HCI_CONN_FLAG_REMOTE_WAKEUP; |
2629 | |
2630 | hci_sock_dev_event(hdev, HCI_DEV_REG); |
2631 | hci_dev_hold(d: hdev); |
2632 | |
2633 | error = hci_register_suspend_notifier(hdev); |
2634 | if (error) |
2635 | BT_WARN("register suspend notifier failed error:%d\n", error); |
2636 | |
2637 | queue_work(wq: hdev->req_workqueue, work: &hdev->power_on); |
2638 | |
2639 | idr_init(idr: &hdev->adv_monitors_idr); |
2640 | msft_register(hdev); |
2641 | |
2642 | return id; |
2643 | |
2644 | err_wqueue: |
2645 | debugfs_remove_recursive(dentry: hdev->debugfs); |
2646 | destroy_workqueue(wq: hdev->workqueue); |
2647 | destroy_workqueue(wq: hdev->req_workqueue); |
2648 | err: |
2649 | ida_free(&hci_index_ida, id: hdev->id); |
2650 | |
2651 | return error; |
2652 | } |
2653 | EXPORT_SYMBOL(hci_register_dev); |
2654 | |
2655 | /* Unregister HCI device */ |
2656 | void hci_unregister_dev(struct hci_dev *hdev) |
2657 | { |
2658 | BT_DBG("%p name %s bus %d", hdev, hdev->name, hdev->bus); |
2659 | |
2660 | mutex_lock(&hdev->unregister_lock); |
2661 | hci_dev_set_flag(hdev, HCI_UNREGISTER); |
2662 | mutex_unlock(lock: &hdev->unregister_lock); |
2663 | |
2664 | write_lock(&hci_dev_list_lock); |
2665 | list_del(entry: &hdev->list); |
2666 | write_unlock(&hci_dev_list_lock); |
2667 | |
2668 | disable_work_sync(work: &hdev->rx_work); |
2669 | disable_work_sync(work: &hdev->cmd_work); |
2670 | disable_work_sync(work: &hdev->tx_work); |
2671 | disable_work_sync(work: &hdev->power_on); |
2672 | disable_work_sync(work: &hdev->error_reset); |
2673 | |
2674 | hci_cmd_sync_clear(hdev); |
2675 | |
2676 | hci_unregister_suspend_notifier(hdev); |
2677 | |
2678 | hci_dev_do_close(hdev); |
2679 | |
2680 | if (!test_bit(HCI_INIT, &hdev->flags) && |
2681 | !hci_dev_test_flag(hdev, HCI_SETUP) && |
2682 | !hci_dev_test_flag(hdev, HCI_CONFIG)) { |
2683 | hci_dev_lock(hdev); |
2684 | mgmt_index_removed(hdev); |
2685 | hci_dev_unlock(hdev); |
2686 | } |
2687 | |
2688 | /* mgmt_index_removed should take care of emptying the |
2689 | * pending list */ |
2690 | BUG_ON(!list_empty(&hdev->mgmt_pending)); |
2691 | |
2692 | hci_sock_dev_event(hdev, HCI_DEV_UNREG); |
2693 | |
2694 | if (hdev->rfkill) { |
2695 | rfkill_unregister(rfkill: hdev->rfkill); |
2696 | rfkill_destroy(rfkill: hdev->rfkill); |
2697 | } |
2698 | |
2699 | device_del(dev: &hdev->dev); |
2700 | /* Actual cleanup is deferred until hci_release_dev(). */ |
2701 | hci_dev_put(d: hdev); |
2702 | } |
2703 | EXPORT_SYMBOL(hci_unregister_dev); |
2704 | |
2705 | /* Release HCI device */ |
2706 | void hci_release_dev(struct hci_dev *hdev) |
2707 | { |
2708 | debugfs_remove_recursive(dentry: hdev->debugfs); |
2709 | kfree_const(x: hdev->hw_info); |
2710 | kfree_const(x: hdev->fw_info); |
2711 | |
2712 | destroy_workqueue(wq: hdev->workqueue); |
2713 | destroy_workqueue(wq: hdev->req_workqueue); |
2714 | |
2715 | hci_dev_lock(hdev); |
2716 | hci_bdaddr_list_clear(bdaddr_list: &hdev->reject_list); |
2717 | hci_bdaddr_list_clear(bdaddr_list: &hdev->accept_list); |
2718 | hci_uuids_clear(hdev); |
2719 | hci_link_keys_clear(hdev); |
2720 | hci_smp_ltks_clear(hdev); |
2721 | hci_smp_irks_clear(hdev); |
2722 | hci_remote_oob_data_clear(hdev); |
2723 | hci_adv_instances_clear(hdev); |
2724 | hci_adv_monitors_clear(hdev); |
2725 | hci_bdaddr_list_clear(bdaddr_list: &hdev->le_accept_list); |
2726 | hci_bdaddr_list_clear(bdaddr_list: &hdev->le_resolv_list); |
2727 | hci_conn_params_clear_all(hdev); |
2728 | hci_discovery_filter_clear(hdev); |
2729 | hci_blocked_keys_clear(hdev); |
2730 | hci_codec_list_clear(codec_list: &hdev->local_codecs); |
2731 | msft_release(hdev); |
2732 | hci_dev_unlock(hdev); |
2733 | |
2734 | ida_destroy(ida: &hdev->unset_handle_ida); |
2735 | ida_free(&hci_index_ida, id: hdev->id); |
2736 | kfree_skb(skb: hdev->sent_cmd); |
2737 | kfree_skb(skb: hdev->req_skb); |
2738 | kfree_skb(skb: hdev->recv_event); |
2739 | kfree(objp: hdev); |
2740 | } |
2741 | EXPORT_SYMBOL(hci_release_dev); |
2742 | |
2743 | int hci_register_suspend_notifier(struct hci_dev *hdev) |
2744 | { |
2745 | int ret = 0; |
2746 | |
2747 | if (!hdev->suspend_notifier.notifier_call && |
2748 | !test_bit(HCI_QUIRK_NO_SUSPEND_NOTIFIER, &hdev->quirks)) { |
2749 | hdev->suspend_notifier.notifier_call = hci_suspend_notifier; |
2750 | ret = register_pm_notifier(nb: &hdev->suspend_notifier); |
2751 | } |
2752 | |
2753 | return ret; |
2754 | } |
2755 | |
2756 | int hci_unregister_suspend_notifier(struct hci_dev *hdev) |
2757 | { |
2758 | int ret = 0; |
2759 | |
2760 | if (hdev->suspend_notifier.notifier_call) { |
2761 | ret = unregister_pm_notifier(nb: &hdev->suspend_notifier); |
2762 | if (!ret) |
2763 | hdev->suspend_notifier.notifier_call = NULL; |
2764 | } |
2765 | |
2766 | return ret; |
2767 | } |
2768 | |
2769 | /* Cancel ongoing command synchronously: |
2770 | * |
2771 | * - Cancel command timer |
2772 | * - Reset command counter |
2773 | * - Cancel command request |
2774 | */ |
2775 | static void hci_cancel_cmd_sync(struct hci_dev *hdev, int err) |
2776 | { |
2777 | bt_dev_dbg(hdev, "err 0x%2.2x", err); |
2778 | |
2779 | if (hci_dev_test_flag(hdev, HCI_UNREGISTER)) { |
2780 | disable_delayed_work_sync(dwork: &hdev->cmd_timer); |
2781 | disable_delayed_work_sync(dwork: &hdev->ncmd_timer); |
2782 | } else { |
2783 | cancel_delayed_work_sync(dwork: &hdev->cmd_timer); |
2784 | cancel_delayed_work_sync(dwork: &hdev->ncmd_timer); |
2785 | } |
2786 | |
2787 | atomic_set(v: &hdev->cmd_cnt, i: 1); |
2788 | |
2789 | hci_cmd_sync_cancel_sync(hdev, err); |
2790 | } |
2791 | |
2792 | /* Suspend HCI device */ |
2793 | int hci_suspend_dev(struct hci_dev *hdev) |
2794 | { |
2795 | int ret; |
2796 | |
2797 | bt_dev_dbg(hdev, ""); |
2798 | |
2799 | /* Suspend should only act on when powered. */ |
2800 | if (!hdev_is_powered(hdev) || |
2801 | hci_dev_test_flag(hdev, HCI_UNREGISTER)) |
2802 | return 0; |
2803 | |
2804 | /* If powering down don't attempt to suspend */ |
2805 | if (mgmt_powering_down(hdev)) |
2806 | return 0; |
2807 | |
2808 | /* Cancel potentially blocking sync operation before suspend */ |
2809 | hci_cancel_cmd_sync(hdev, EHOSTDOWN); |
2810 | |
2811 | hci_req_sync_lock(hdev); |
2812 | ret = hci_suspend_sync(hdev); |
2813 | hci_req_sync_unlock(hdev); |
2814 | |
2815 | hci_clear_wake_reason(hdev); |
2816 | mgmt_suspending(hdev, state: hdev->suspend_state); |
2817 | |
2818 | hci_sock_dev_event(hdev, HCI_DEV_SUSPEND); |
2819 | return ret; |
2820 | } |
2821 | EXPORT_SYMBOL(hci_suspend_dev); |
2822 | |
2823 | /* Resume HCI device */ |
2824 | int hci_resume_dev(struct hci_dev *hdev) |
2825 | { |
2826 | int ret; |
2827 | |
2828 | bt_dev_dbg(hdev, ""); |
2829 | |
2830 | /* Resume should only act on when powered. */ |
2831 | if (!hdev_is_powered(hdev) || |
2832 | hci_dev_test_flag(hdev, HCI_UNREGISTER)) |
2833 | return 0; |
2834 | |
2835 | /* If powering down don't attempt to resume */ |
2836 | if (mgmt_powering_down(hdev)) |
2837 | return 0; |
2838 | |
2839 | hci_req_sync_lock(hdev); |
2840 | ret = hci_resume_sync(hdev); |
2841 | hci_req_sync_unlock(hdev); |
2842 | |
2843 | mgmt_resuming(hdev, reason: hdev->wake_reason, bdaddr: &hdev->wake_addr, |
2844 | addr_type: hdev->wake_addr_type); |
2845 | |
2846 | hci_sock_dev_event(hdev, HCI_DEV_RESUME); |
2847 | return ret; |
2848 | } |
2849 | EXPORT_SYMBOL(hci_resume_dev); |
2850 | |
2851 | /* Reset HCI device */ |
2852 | int hci_reset_dev(struct hci_dev *hdev) |
2853 | { |
2854 | static const u8 hw_err[] = { HCI_EV_HARDWARE_ERROR, 0x01, 0x00 }; |
2855 | struct sk_buff *skb; |
2856 | |
2857 | skb = bt_skb_alloc(len: 3, GFP_ATOMIC); |
2858 | if (!skb) |
2859 | return -ENOMEM; |
2860 | |
2861 | hci_skb_pkt_type(skb) = HCI_EVENT_PKT; |
2862 | skb_put_data(skb, data: hw_err, len: 3); |
2863 | |
2864 | bt_dev_err(hdev, "Injecting HCI hardware error event"); |
2865 | |
2866 | /* Send Hardware Error to upper stack */ |
2867 | return hci_recv_frame(hdev, skb); |
2868 | } |
2869 | EXPORT_SYMBOL(hci_reset_dev); |
2870 | |
2871 | static u8 hci_dev_classify_pkt_type(struct hci_dev *hdev, struct sk_buff *skb) |
2872 | { |
2873 | if (hdev->classify_pkt_type) |
2874 | return hdev->classify_pkt_type(hdev, skb); |
2875 | |
2876 | return hci_skb_pkt_type(skb); |
2877 | } |
2878 | |
2879 | /* Receive frame from HCI drivers */ |
2880 | int hci_recv_frame(struct hci_dev *hdev, struct sk_buff *skb) |
2881 | { |
2882 | u8 dev_pkt_type; |
2883 | |
2884 | if (!hdev || (!test_bit(HCI_UP, &hdev->flags) |
2885 | && !test_bit(HCI_INIT, &hdev->flags))) { |
2886 | kfree_skb(skb); |
2887 | return -ENXIO; |
2888 | } |
2889 | |
2890 | /* Check if the driver agree with packet type classification */ |
2891 | dev_pkt_type = hci_dev_classify_pkt_type(hdev, skb); |
2892 | if (hci_skb_pkt_type(skb) != dev_pkt_type) { |
2893 | hci_skb_pkt_type(skb) = dev_pkt_type; |
2894 | } |
2895 | |
2896 | switch (hci_skb_pkt_type(skb)) { |
2897 | case HCI_EVENT_PKT: |
2898 | break; |
2899 | case HCI_ACLDATA_PKT: |
2900 | /* Detect if ISO packet has been sent as ACL */ |
2901 | if (hci_conn_num(hdev, CIS_LINK) || |
2902 | hci_conn_num(hdev, BIS_LINK)) { |
2903 | __u16 handle = __le16_to_cpu(hci_acl_hdr(skb)->handle); |
2904 | __u8 type; |
2905 | |
2906 | type = hci_conn_lookup_type(hdev, hci_handle(handle)); |
2907 | if (type == CIS_LINK || type == BIS_LINK) |
2908 | hci_skb_pkt_type(skb) = HCI_ISODATA_PKT; |
2909 | } |
2910 | break; |
2911 | case HCI_SCODATA_PKT: |
2912 | break; |
2913 | case HCI_ISODATA_PKT: |
2914 | break; |
2915 | case HCI_DRV_PKT: |
2916 | break; |
2917 | default: |
2918 | kfree_skb(skb); |
2919 | return -EINVAL; |
2920 | } |
2921 | |
2922 | /* Incoming skb */ |
2923 | bt_cb(skb)->incoming = 1; |
2924 | |
2925 | /* Time stamp */ |
2926 | __net_timestamp(skb); |
2927 | |
2928 | skb_queue_tail(list: &hdev->rx_q, newsk: skb); |
2929 | queue_work(wq: hdev->workqueue, work: &hdev->rx_work); |
2930 | |
2931 | return 0; |
2932 | } |
2933 | EXPORT_SYMBOL(hci_recv_frame); |
2934 | |
2935 | /* Receive diagnostic message from HCI drivers */ |
2936 | int hci_recv_diag(struct hci_dev *hdev, struct sk_buff *skb) |
2937 | { |
2938 | /* Mark as diagnostic packet */ |
2939 | hci_skb_pkt_type(skb) = HCI_DIAG_PKT; |
2940 | |
2941 | /* Time stamp */ |
2942 | __net_timestamp(skb); |
2943 | |
2944 | skb_queue_tail(list: &hdev->rx_q, newsk: skb); |
2945 | queue_work(wq: hdev->workqueue, work: &hdev->rx_work); |
2946 | |
2947 | return 0; |
2948 | } |
2949 | EXPORT_SYMBOL(hci_recv_diag); |
2950 | |
2951 | void hci_set_hw_info(struct hci_dev *hdev, const char *fmt, ...) |
2952 | { |
2953 | va_list vargs; |
2954 | |
2955 | va_start(vargs, fmt); |
2956 | kfree_const(x: hdev->hw_info); |
2957 | hdev->hw_info = kvasprintf_const(GFP_KERNEL, fmt, args: vargs); |
2958 | va_end(vargs); |
2959 | } |
2960 | EXPORT_SYMBOL(hci_set_hw_info); |
2961 | |
2962 | void hci_set_fw_info(struct hci_dev *hdev, const char *fmt, ...) |
2963 | { |
2964 | va_list vargs; |
2965 | |
2966 | va_start(vargs, fmt); |
2967 | kfree_const(x: hdev->fw_info); |
2968 | hdev->fw_info = kvasprintf_const(GFP_KERNEL, fmt, args: vargs); |
2969 | va_end(vargs); |
2970 | } |
2971 | EXPORT_SYMBOL(hci_set_fw_info); |
2972 | |
2973 | /* ---- Interface to upper protocols ---- */ |
2974 | |
2975 | int hci_register_cb(struct hci_cb *cb) |
2976 | { |
2977 | BT_DBG("%p name %s", cb, cb->name); |
2978 | |
2979 | mutex_lock(&hci_cb_list_lock); |
2980 | list_add_tail(new: &cb->list, head: &hci_cb_list); |
2981 | mutex_unlock(lock: &hci_cb_list_lock); |
2982 | |
2983 | return 0; |
2984 | } |
2985 | EXPORT_SYMBOL(hci_register_cb); |
2986 | |
2987 | int hci_unregister_cb(struct hci_cb *cb) |
2988 | { |
2989 | BT_DBG("%p name %s", cb, cb->name); |
2990 | |
2991 | mutex_lock(&hci_cb_list_lock); |
2992 | list_del(entry: &cb->list); |
2993 | mutex_unlock(lock: &hci_cb_list_lock); |
2994 | |
2995 | return 0; |
2996 | } |
2997 | EXPORT_SYMBOL(hci_unregister_cb); |
2998 | |
2999 | static int hci_send_frame(struct hci_dev *hdev, struct sk_buff *skb) |
3000 | { |
3001 | int err; |
3002 | |
3003 | BT_DBG("%s type %d len %d", hdev->name, hci_skb_pkt_type(skb), |
3004 | skb->len); |
3005 | |
3006 | /* Time stamp */ |
3007 | __net_timestamp(skb); |
3008 | |
3009 | /* Send copy to monitor */ |
3010 | hci_send_to_monitor(hdev, skb); |
3011 | |
3012 | if (atomic_read(v: &hdev->promisc)) { |
3013 | /* Send copy to the sockets */ |
3014 | hci_send_to_sock(hdev, skb); |
3015 | } |
3016 | |
3017 | /* Get rid of skb owner, prior to sending to the driver. */ |
3018 | skb_orphan(skb); |
3019 | |
3020 | if (!test_bit(HCI_RUNNING, &hdev->flags)) { |
3021 | kfree_skb(skb); |
3022 | return -EINVAL; |
3023 | } |
3024 | |
3025 | if (hci_skb_pkt_type(skb) == HCI_DRV_PKT) { |
3026 | /* Intercept HCI Drv packet here and don't go with hdev->send |
3027 | * callback. |
3028 | */ |
3029 | err = hci_drv_process_cmd(hdev, cmd_skb: skb); |
3030 | kfree_skb(skb); |
3031 | return err; |
3032 | } |
3033 | |
3034 | err = hdev->send(hdev, skb); |
3035 | if (err < 0) { |
3036 | bt_dev_err(hdev, "sending frame failed (%d)", err); |
3037 | kfree_skb(skb); |
3038 | return err; |
3039 | } |
3040 | |
3041 | return 0; |
3042 | } |
3043 | |
3044 | static int hci_send_conn_frame(struct hci_dev *hdev, struct hci_conn *conn, |
3045 | struct sk_buff *skb) |
3046 | { |
3047 | hci_conn_tx_queue(conn, skb); |
3048 | return hci_send_frame(hdev, skb); |
3049 | } |
3050 | |
3051 | /* Send HCI command */ |
3052 | int hci_send_cmd(struct hci_dev *hdev, __u16 opcode, __u32 plen, |
3053 | const void *param) |
3054 | { |
3055 | struct sk_buff *skb; |
3056 | |
3057 | BT_DBG("%s opcode 0x%4.4x plen %d", hdev->name, opcode, plen); |
3058 | |
3059 | skb = hci_cmd_sync_alloc(hdev, opcode, plen, param, NULL); |
3060 | if (!skb) { |
3061 | bt_dev_err(hdev, "no memory for command"); |
3062 | return -ENOMEM; |
3063 | } |
3064 | |
3065 | /* Stand-alone HCI commands must be flagged as |
3066 | * single-command requests. |
3067 | */ |
3068 | bt_cb(skb)->hci.req_flags |= HCI_REQ_START; |
3069 | |
3070 | skb_queue_tail(list: &hdev->cmd_q, newsk: skb); |
3071 | queue_work(wq: hdev->workqueue, work: &hdev->cmd_work); |
3072 | |
3073 | return 0; |
3074 | } |
3075 | |
3076 | int __hci_cmd_send(struct hci_dev *hdev, u16 opcode, u32 plen, |
3077 | const void *param) |
3078 | { |
3079 | struct sk_buff *skb; |
3080 | |
3081 | if (hci_opcode_ogf(opcode) != 0x3f) { |
3082 | /* A controller receiving a command shall respond with either |
3083 | * a Command Status Event or a Command Complete Event. |
3084 | * Therefore, all standard HCI commands must be sent via the |
3085 | * standard API, using hci_send_cmd or hci_cmd_sync helpers. |
3086 | * Some vendors do not comply with this rule for vendor-specific |
3087 | * commands and do not return any event. We want to support |
3088 | * unresponded commands for such cases only. |
3089 | */ |
3090 | bt_dev_err(hdev, "unresponded command not supported"); |
3091 | return -EINVAL; |
3092 | } |
3093 | |
3094 | skb = hci_cmd_sync_alloc(hdev, opcode, plen, param, NULL); |
3095 | if (!skb) { |
3096 | bt_dev_err(hdev, "no memory for command (opcode 0x%4.4x)", |
3097 | opcode); |
3098 | return -ENOMEM; |
3099 | } |
3100 | |
3101 | hci_send_frame(hdev, skb); |
3102 | |
3103 | return 0; |
3104 | } |
3105 | EXPORT_SYMBOL(__hci_cmd_send); |
3106 | |
3107 | /* Get data from the previously sent command */ |
3108 | static void *hci_cmd_data(struct sk_buff *skb, __u16 opcode) |
3109 | { |
3110 | struct hci_command_hdr *hdr; |
3111 | |
3112 | if (!skb || skb->len < HCI_COMMAND_HDR_SIZE) |
3113 | return NULL; |
3114 | |
3115 | hdr = (void *)skb->data; |
3116 | |
3117 | if (hdr->opcode != cpu_to_le16(opcode)) |
3118 | return NULL; |
3119 | |
3120 | return skb->data + HCI_COMMAND_HDR_SIZE; |
3121 | } |
3122 | |
3123 | /* Get data from the previously sent command */ |
3124 | void *hci_sent_cmd_data(struct hci_dev *hdev, __u16 opcode) |
3125 | { |
3126 | void *data; |
3127 | |
3128 | /* Check if opcode matches last sent command */ |
3129 | data = hci_cmd_data(skb: hdev->sent_cmd, opcode); |
3130 | if (!data) |
3131 | /* Check if opcode matches last request */ |
3132 | data = hci_cmd_data(skb: hdev->req_skb, opcode); |
3133 | |
3134 | return data; |
3135 | } |
3136 | |
3137 | /* Get data from last received event */ |
3138 | void *hci_recv_event_data(struct hci_dev *hdev, __u8 event) |
3139 | { |
3140 | struct hci_event_hdr *hdr; |
3141 | int offset; |
3142 | |
3143 | if (!hdev->recv_event) |
3144 | return NULL; |
3145 | |
3146 | hdr = (void *)hdev->recv_event->data; |
3147 | offset = sizeof(*hdr); |
3148 | |
3149 | if (hdr->evt != event) { |
3150 | /* In case of LE metaevent check the subevent match */ |
3151 | if (hdr->evt == HCI_EV_LE_META) { |
3152 | struct hci_ev_le_meta *ev; |
3153 | |
3154 | ev = (void *)hdev->recv_event->data + offset; |
3155 | offset += sizeof(*ev); |
3156 | if (ev->subevent == event) |
3157 | goto found; |
3158 | } |
3159 | return NULL; |
3160 | } |
3161 | |
3162 | found: |
3163 | bt_dev_dbg(hdev, "event 0x%2.2x", event); |
3164 | |
3165 | return hdev->recv_event->data + offset; |
3166 | } |
3167 | |
3168 | /* Send ACL data */ |
3169 | static void hci_add_acl_hdr(struct sk_buff *skb, __u16 handle, __u16 flags) |
3170 | { |
3171 | struct hci_acl_hdr *hdr; |
3172 | int len = skb->len; |
3173 | |
3174 | skb_push(skb, HCI_ACL_HDR_SIZE); |
3175 | skb_reset_transport_header(skb); |
3176 | hdr = (struct hci_acl_hdr *)skb_transport_header(skb); |
3177 | hdr->handle = cpu_to_le16(hci_handle_pack(handle, flags)); |
3178 | hdr->dlen = cpu_to_le16(len); |
3179 | } |
3180 | |
3181 | static void hci_queue_acl(struct hci_chan *chan, struct sk_buff_head *queue, |
3182 | struct sk_buff *skb, __u16 flags) |
3183 | { |
3184 | struct hci_conn *conn = chan->conn; |
3185 | struct hci_dev *hdev = conn->hdev; |
3186 | struct sk_buff *list; |
3187 | |
3188 | skb->len = skb_headlen(skb); |
3189 | skb->data_len = 0; |
3190 | |
3191 | hci_skb_pkt_type(skb) = HCI_ACLDATA_PKT; |
3192 | |
3193 | hci_add_acl_hdr(skb, handle: conn->handle, flags); |
3194 | |
3195 | list = skb_shinfo(skb)->frag_list; |
3196 | if (!list) { |
3197 | /* Non fragmented */ |
3198 | BT_DBG("%s nonfrag skb %p len %d", hdev->name, skb, skb->len); |
3199 | |
3200 | skb_queue_tail(list: queue, newsk: skb); |
3201 | } else { |
3202 | /* Fragmented */ |
3203 | BT_DBG("%s frag %p len %d", hdev->name, skb, skb->len); |
3204 | |
3205 | skb_shinfo(skb)->frag_list = NULL; |
3206 | |
3207 | /* Queue all fragments atomically. We need to use spin_lock_bh |
3208 | * here because of 6LoWPAN links, as there this function is |
3209 | * called from softirq and using normal spin lock could cause |
3210 | * deadlocks. |
3211 | */ |
3212 | spin_lock_bh(lock: &queue->lock); |
3213 | |
3214 | __skb_queue_tail(list: queue, newsk: skb); |
3215 | |
3216 | flags &= ~ACL_START; |
3217 | flags |= ACL_CONT; |
3218 | do { |
3219 | skb = list; list = list->next; |
3220 | |
3221 | hci_skb_pkt_type(skb) = HCI_ACLDATA_PKT; |
3222 | hci_add_acl_hdr(skb, handle: conn->handle, flags); |
3223 | |
3224 | BT_DBG("%s frag %p len %d", hdev->name, skb, skb->len); |
3225 | |
3226 | __skb_queue_tail(list: queue, newsk: skb); |
3227 | } while (list); |
3228 | |
3229 | spin_unlock_bh(lock: &queue->lock); |
3230 | } |
3231 | } |
3232 | |
3233 | void hci_send_acl(struct hci_chan *chan, struct sk_buff *skb, __u16 flags) |
3234 | { |
3235 | struct hci_dev *hdev = chan->conn->hdev; |
3236 | |
3237 | BT_DBG("%s chan %p flags 0x%4.4x", hdev->name, chan, flags); |
3238 | |
3239 | hci_queue_acl(chan, queue: &chan->data_q, skb, flags); |
3240 | |
3241 | queue_work(wq: hdev->workqueue, work: &hdev->tx_work); |
3242 | } |
3243 | |
3244 | /* Send SCO data */ |
3245 | void hci_send_sco(struct hci_conn *conn, struct sk_buff *skb) |
3246 | { |
3247 | struct hci_dev *hdev = conn->hdev; |
3248 | struct hci_sco_hdr hdr; |
3249 | |
3250 | BT_DBG("%s len %d", hdev->name, skb->len); |
3251 | |
3252 | hdr.handle = cpu_to_le16(conn->handle); |
3253 | hdr.dlen = skb->len; |
3254 | |
3255 | skb_push(skb, HCI_SCO_HDR_SIZE); |
3256 | skb_reset_transport_header(skb); |
3257 | memcpy(skb_transport_header(skb), &hdr, HCI_SCO_HDR_SIZE); |
3258 | |
3259 | hci_skb_pkt_type(skb) = HCI_SCODATA_PKT; |
3260 | |
3261 | skb_queue_tail(list: &conn->data_q, newsk: skb); |
3262 | queue_work(wq: hdev->workqueue, work: &hdev->tx_work); |
3263 | } |
3264 | |
3265 | /* Send ISO data */ |
3266 | static void hci_add_iso_hdr(struct sk_buff *skb, __u16 handle, __u8 flags) |
3267 | { |
3268 | struct hci_iso_hdr *hdr; |
3269 | int len = skb->len; |
3270 | |
3271 | skb_push(skb, HCI_ISO_HDR_SIZE); |
3272 | skb_reset_transport_header(skb); |
3273 | hdr = (struct hci_iso_hdr *)skb_transport_header(skb); |
3274 | hdr->handle = cpu_to_le16(hci_handle_pack(handle, flags)); |
3275 | hdr->dlen = cpu_to_le16(len); |
3276 | } |
3277 | |
3278 | static void hci_queue_iso(struct hci_conn *conn, struct sk_buff_head *queue, |
3279 | struct sk_buff *skb) |
3280 | { |
3281 | struct hci_dev *hdev = conn->hdev; |
3282 | struct sk_buff *list; |
3283 | __u16 flags; |
3284 | |
3285 | skb->len = skb_headlen(skb); |
3286 | skb->data_len = 0; |
3287 | |
3288 | hci_skb_pkt_type(skb) = HCI_ISODATA_PKT; |
3289 | |
3290 | list = skb_shinfo(skb)->frag_list; |
3291 | |
3292 | flags = hci_iso_flags_pack(list ? ISO_START : ISO_SINGLE, 0x00); |
3293 | hci_add_iso_hdr(skb, handle: conn->handle, flags); |
3294 | |
3295 | if (!list) { |
3296 | /* Non fragmented */ |
3297 | BT_DBG("%s nonfrag skb %p len %d", hdev->name, skb, skb->len); |
3298 | |
3299 | skb_queue_tail(list: queue, newsk: skb); |
3300 | } else { |
3301 | /* Fragmented */ |
3302 | BT_DBG("%s frag %p len %d", hdev->name, skb, skb->len); |
3303 | |
3304 | skb_shinfo(skb)->frag_list = NULL; |
3305 | |
3306 | __skb_queue_tail(list: queue, newsk: skb); |
3307 | |
3308 | do { |
3309 | skb = list; list = list->next; |
3310 | |
3311 | hci_skb_pkt_type(skb) = HCI_ISODATA_PKT; |
3312 | flags = hci_iso_flags_pack(list ? ISO_CONT : ISO_END, |
3313 | 0x00); |
3314 | hci_add_iso_hdr(skb, handle: conn->handle, flags); |
3315 | |
3316 | BT_DBG("%s frag %p len %d", hdev->name, skb, skb->len); |
3317 | |
3318 | __skb_queue_tail(list: queue, newsk: skb); |
3319 | } while (list); |
3320 | } |
3321 | } |
3322 | |
3323 | void hci_send_iso(struct hci_conn *conn, struct sk_buff *skb) |
3324 | { |
3325 | struct hci_dev *hdev = conn->hdev; |
3326 | |
3327 | BT_DBG("%s len %d", hdev->name, skb->len); |
3328 | |
3329 | hci_queue_iso(conn, queue: &conn->data_q, skb); |
3330 | |
3331 | queue_work(wq: hdev->workqueue, work: &hdev->tx_work); |
3332 | } |
3333 | |
3334 | /* ---- HCI TX task (outgoing data) ---- */ |
3335 | |
3336 | /* HCI Connection scheduler */ |
3337 | static inline void hci_quote_sent(struct hci_conn *conn, int num, int *quote) |
3338 | { |
3339 | struct hci_dev *hdev; |
3340 | int cnt, q; |
3341 | |
3342 | if (!conn) { |
3343 | *quote = 0; |
3344 | return; |
3345 | } |
3346 | |
3347 | hdev = conn->hdev; |
3348 | |
3349 | switch (conn->type) { |
3350 | case ACL_LINK: |
3351 | cnt = hdev->acl_cnt; |
3352 | break; |
3353 | case SCO_LINK: |
3354 | case ESCO_LINK: |
3355 | cnt = hdev->sco_cnt; |
3356 | break; |
3357 | case LE_LINK: |
3358 | cnt = hdev->le_mtu ? hdev->le_cnt : hdev->acl_cnt; |
3359 | break; |
3360 | case CIS_LINK: |
3361 | case BIS_LINK: |
3362 | cnt = hdev->iso_mtu ? hdev->iso_cnt : |
3363 | hdev->le_mtu ? hdev->le_cnt : hdev->acl_cnt; |
3364 | break; |
3365 | default: |
3366 | cnt = 0; |
3367 | bt_dev_err(hdev, "unknown link type %d", conn->type); |
3368 | } |
3369 | |
3370 | q = cnt / num; |
3371 | *quote = q ? q : 1; |
3372 | } |
3373 | |
3374 | static struct hci_conn *hci_low_sent(struct hci_dev *hdev, __u8 type, |
3375 | __u8 type2, int *quote) |
3376 | { |
3377 | struct hci_conn_hash *h = &hdev->conn_hash; |
3378 | struct hci_conn *conn = NULL, *c; |
3379 | unsigned int num = 0, min = ~0; |
3380 | |
3381 | /* We don't have to lock device here. Connections are always |
3382 | * added and removed with TX task disabled. */ |
3383 | |
3384 | rcu_read_lock(); |
3385 | |
3386 | list_for_each_entry_rcu(c, &h->list, list) { |
3387 | if ((c->type != type && c->type != type2) || |
3388 | skb_queue_empty(list: &c->data_q)) |
3389 | continue; |
3390 | |
3391 | if (c->state != BT_CONNECTED && c->state != BT_CONFIG) |
3392 | continue; |
3393 | |
3394 | num++; |
3395 | |
3396 | if (c->sent < min) { |
3397 | min = c->sent; |
3398 | conn = c; |
3399 | } |
3400 | |
3401 | if (hci_conn_num(hdev, type) == num) |
3402 | break; |
3403 | } |
3404 | |
3405 | rcu_read_unlock(); |
3406 | |
3407 | hci_quote_sent(conn, num, quote); |
3408 | |
3409 | BT_DBG("conn %p quote %d", conn, *quote); |
3410 | return conn; |
3411 | } |
3412 | |
3413 | static void hci_link_tx_to(struct hci_dev *hdev, __u8 type) |
3414 | { |
3415 | struct hci_conn_hash *h = &hdev->conn_hash; |
3416 | struct hci_conn *c; |
3417 | |
3418 | bt_dev_err(hdev, "link tx timeout"); |
3419 | |
3420 | rcu_read_lock(); |
3421 | |
3422 | /* Kill stalled connections */ |
3423 | list_for_each_entry_rcu(c, &h->list, list) { |
3424 | if (c->type == type && c->sent) { |
3425 | bt_dev_err(hdev, "killing stalled connection %pMR", |
3426 | &c->dst); |
3427 | /* hci_disconnect might sleep, so, we have to release |
3428 | * the RCU read lock before calling it. |
3429 | */ |
3430 | rcu_read_unlock(); |
3431 | hci_disconnect(conn: c, HCI_ERROR_REMOTE_USER_TERM); |
3432 | rcu_read_lock(); |
3433 | } |
3434 | } |
3435 | |
3436 | rcu_read_unlock(); |
3437 | } |
3438 | |
3439 | static struct hci_chan *hci_chan_sent(struct hci_dev *hdev, __u8 type, |
3440 | int *quote) |
3441 | { |
3442 | struct hci_conn_hash *h = &hdev->conn_hash; |
3443 | struct hci_chan *chan = NULL; |
3444 | unsigned int num = 0, min = ~0, cur_prio = 0; |
3445 | struct hci_conn *conn; |
3446 | int conn_num = 0; |
3447 | |
3448 | BT_DBG("%s", hdev->name); |
3449 | |
3450 | rcu_read_lock(); |
3451 | |
3452 | list_for_each_entry_rcu(conn, &h->list, list) { |
3453 | struct hci_chan *tmp; |
3454 | |
3455 | if (conn->type != type) |
3456 | continue; |
3457 | |
3458 | if (conn->state != BT_CONNECTED && conn->state != BT_CONFIG) |
3459 | continue; |
3460 | |
3461 | conn_num++; |
3462 | |
3463 | list_for_each_entry_rcu(tmp, &conn->chan_list, list) { |
3464 | struct sk_buff *skb; |
3465 | |
3466 | if (skb_queue_empty(list: &tmp->data_q)) |
3467 | continue; |
3468 | |
3469 | skb = skb_peek(list_: &tmp->data_q); |
3470 | if (skb->priority < cur_prio) |
3471 | continue; |
3472 | |
3473 | if (skb->priority > cur_prio) { |
3474 | num = 0; |
3475 | min = ~0; |
3476 | cur_prio = skb->priority; |
3477 | } |
3478 | |
3479 | num++; |
3480 | |
3481 | if (conn->sent < min) { |
3482 | min = conn->sent; |
3483 | chan = tmp; |
3484 | } |
3485 | } |
3486 | |
3487 | if (hci_conn_num(hdev, type) == conn_num) |
3488 | break; |
3489 | } |
3490 | |
3491 | rcu_read_unlock(); |
3492 | |
3493 | if (!chan) |
3494 | return NULL; |
3495 | |
3496 | hci_quote_sent(conn: chan->conn, num, quote); |
3497 | |
3498 | BT_DBG("chan %p quote %d", chan, *quote); |
3499 | return chan; |
3500 | } |
3501 | |
3502 | static void hci_prio_recalculate(struct hci_dev *hdev, __u8 type) |
3503 | { |
3504 | struct hci_conn_hash *h = &hdev->conn_hash; |
3505 | struct hci_conn *conn; |
3506 | int num = 0; |
3507 | |
3508 | BT_DBG("%s", hdev->name); |
3509 | |
3510 | rcu_read_lock(); |
3511 | |
3512 | list_for_each_entry_rcu(conn, &h->list, list) { |
3513 | struct hci_chan *chan; |
3514 | |
3515 | if (conn->type != type) |
3516 | continue; |
3517 | |
3518 | if (conn->state != BT_CONNECTED && conn->state != BT_CONFIG) |
3519 | continue; |
3520 | |
3521 | num++; |
3522 | |
3523 | list_for_each_entry_rcu(chan, &conn->chan_list, list) { |
3524 | struct sk_buff *skb; |
3525 | |
3526 | if (chan->sent) { |
3527 | chan->sent = 0; |
3528 | continue; |
3529 | } |
3530 | |
3531 | if (skb_queue_empty(list: &chan->data_q)) |
3532 | continue; |
3533 | |
3534 | skb = skb_peek(list_: &chan->data_q); |
3535 | if (skb->priority >= HCI_PRIO_MAX - 1) |
3536 | continue; |
3537 | |
3538 | skb->priority = HCI_PRIO_MAX - 1; |
3539 | |
3540 | BT_DBG("chan %p skb %p promoted to %d", chan, skb, |
3541 | skb->priority); |
3542 | } |
3543 | |
3544 | if (hci_conn_num(hdev, type) == num) |
3545 | break; |
3546 | } |
3547 | |
3548 | rcu_read_unlock(); |
3549 | |
3550 | } |
3551 | |
3552 | static void __check_timeout(struct hci_dev *hdev, unsigned int cnt, u8 type) |
3553 | { |
3554 | unsigned long last_tx; |
3555 | |
3556 | if (hci_dev_test_flag(hdev, HCI_UNCONFIGURED)) |
3557 | return; |
3558 | |
3559 | switch (type) { |
3560 | case LE_LINK: |
3561 | last_tx = hdev->le_last_tx; |
3562 | break; |
3563 | default: |
3564 | last_tx = hdev->acl_last_tx; |
3565 | break; |
3566 | } |
3567 | |
3568 | /* tx timeout must be longer than maximum link supervision timeout |
3569 | * (40.9 seconds) |
3570 | */ |
3571 | if (!cnt && time_after(jiffies, last_tx + HCI_ACL_TX_TIMEOUT)) |
3572 | hci_link_tx_to(hdev, type); |
3573 | } |
3574 | |
3575 | /* Schedule SCO */ |
3576 | static void hci_sched_sco(struct hci_dev *hdev, __u8 type) |
3577 | { |
3578 | struct hci_conn *conn; |
3579 | struct sk_buff *skb; |
3580 | int quote, *cnt; |
3581 | unsigned int pkts = hdev->sco_pkts; |
3582 | |
3583 | bt_dev_dbg(hdev, "type %u", type); |
3584 | |
3585 | if (!hci_conn_num(hdev, type) || !pkts) |
3586 | return; |
3587 | |
3588 | /* Use sco_pkts if flow control has not been enabled which will limit |
3589 | * the amount of buffer sent in a row. |
3590 | */ |
3591 | if (!hci_dev_test_flag(hdev, HCI_SCO_FLOWCTL)) |
3592 | cnt = &pkts; |
3593 | else |
3594 | cnt = &hdev->sco_cnt; |
3595 | |
3596 | while (*cnt && (conn = hci_low_sent(hdev, type, type2: type, quote: "e))) { |
3597 | while (quote-- && (skb = skb_dequeue(list: &conn->data_q))) { |
3598 | BT_DBG("skb %p len %d", skb, skb->len); |
3599 | hci_send_conn_frame(hdev, conn, skb); |
3600 | |
3601 | conn->sent++; |
3602 | if (conn->sent == ~0) |
3603 | conn->sent = 0; |
3604 | (*cnt)--; |
3605 | } |
3606 | } |
3607 | |
3608 | /* Rescheduled if all packets were sent and flow control is not enabled |
3609 | * as there could be more packets queued that could not be sent and |
3610 | * since no HCI_EV_NUM_COMP_PKTS event will be generated the reschedule |
3611 | * needs to be forced. |
3612 | */ |
3613 | if (!pkts && !hci_dev_test_flag(hdev, HCI_SCO_FLOWCTL)) |
3614 | queue_work(wq: hdev->workqueue, work: &hdev->tx_work); |
3615 | } |
3616 | |
3617 | static void hci_sched_acl_pkt(struct hci_dev *hdev) |
3618 | { |
3619 | unsigned int cnt = hdev->acl_cnt; |
3620 | struct hci_chan *chan; |
3621 | struct sk_buff *skb; |
3622 | int quote; |
3623 | |
3624 | __check_timeout(hdev, cnt, ACL_LINK); |
3625 | |
3626 | while (hdev->acl_cnt && |
3627 | (chan = hci_chan_sent(hdev, ACL_LINK, quote: "e))) { |
3628 | u32 priority = (skb_peek(list_: &chan->data_q))->priority; |
3629 | while (quote-- && (skb = skb_peek(list_: &chan->data_q))) { |
3630 | BT_DBG("chan %p skb %p len %d priority %u", chan, skb, |
3631 | skb->len, skb->priority); |
3632 | |
3633 | /* Stop if priority has changed */ |
3634 | if (skb->priority < priority) |
3635 | break; |
3636 | |
3637 | skb = skb_dequeue(list: &chan->data_q); |
3638 | |
3639 | hci_conn_enter_active_mode(conn: chan->conn, |
3640 | bt_cb(skb)->force_active); |
3641 | |
3642 | hci_send_conn_frame(hdev, conn: chan->conn, skb); |
3643 | hdev->acl_last_tx = jiffies; |
3644 | |
3645 | hdev->acl_cnt--; |
3646 | chan->sent++; |
3647 | chan->conn->sent++; |
3648 | |
3649 | /* Send pending SCO packets right away */ |
3650 | hci_sched_sco(hdev, SCO_LINK); |
3651 | hci_sched_sco(hdev, ESCO_LINK); |
3652 | } |
3653 | } |
3654 | |
3655 | if (cnt != hdev->acl_cnt) |
3656 | hci_prio_recalculate(hdev, ACL_LINK); |
3657 | } |
3658 | |
3659 | static void hci_sched_acl(struct hci_dev *hdev) |
3660 | { |
3661 | BT_DBG("%s", hdev->name); |
3662 | |
3663 | /* No ACL link over BR/EDR controller */ |
3664 | if (!hci_conn_num(hdev, ACL_LINK)) |
3665 | return; |
3666 | |
3667 | hci_sched_acl_pkt(hdev); |
3668 | } |
3669 | |
3670 | static void hci_sched_le(struct hci_dev *hdev) |
3671 | { |
3672 | struct hci_chan *chan; |
3673 | struct sk_buff *skb; |
3674 | int quote, *cnt, tmp; |
3675 | |
3676 | BT_DBG("%s", hdev->name); |
3677 | |
3678 | if (!hci_conn_num(hdev, LE_LINK)) |
3679 | return; |
3680 | |
3681 | cnt = hdev->le_pkts ? &hdev->le_cnt : &hdev->acl_cnt; |
3682 | |
3683 | __check_timeout(hdev, cnt: *cnt, LE_LINK); |
3684 | |
3685 | tmp = *cnt; |
3686 | while (*cnt && (chan = hci_chan_sent(hdev, LE_LINK, quote: "e))) { |
3687 | u32 priority = (skb_peek(list_: &chan->data_q))->priority; |
3688 | while (quote-- && (skb = skb_peek(list_: &chan->data_q))) { |
3689 | BT_DBG("chan %p skb %p len %d priority %u", chan, skb, |
3690 | skb->len, skb->priority); |
3691 | |
3692 | /* Stop if priority has changed */ |
3693 | if (skb->priority < priority) |
3694 | break; |
3695 | |
3696 | skb = skb_dequeue(list: &chan->data_q); |
3697 | |
3698 | hci_send_conn_frame(hdev, conn: chan->conn, skb); |
3699 | hdev->le_last_tx = jiffies; |
3700 | |
3701 | (*cnt)--; |
3702 | chan->sent++; |
3703 | chan->conn->sent++; |
3704 | |
3705 | /* Send pending SCO packets right away */ |
3706 | hci_sched_sco(hdev, SCO_LINK); |
3707 | hci_sched_sco(hdev, ESCO_LINK); |
3708 | } |
3709 | } |
3710 | |
3711 | if (*cnt != tmp) |
3712 | hci_prio_recalculate(hdev, LE_LINK); |
3713 | } |
3714 | |
3715 | /* Schedule CIS */ |
3716 | static void hci_sched_iso(struct hci_dev *hdev) |
3717 | { |
3718 | struct hci_conn *conn; |
3719 | struct sk_buff *skb; |
3720 | int quote, *cnt; |
3721 | |
3722 | BT_DBG("%s", hdev->name); |
3723 | |
3724 | if (!hci_conn_num(hdev, CIS_LINK) && |
3725 | !hci_conn_num(hdev, BIS_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, CIS_LINK, BIS_LINK, |
3731 | quote: "e))) { |
3732 | while (quote-- && (skb = skb_dequeue(list: &conn->data_q))) { |
3733 | BT_DBG("skb %p len %d", skb, skb->len); |
3734 | hci_send_conn_frame(hdev, conn, skb); |
3735 | |
3736 | conn->sent++; |
3737 | if (conn->sent == ~0) |
3738 | conn->sent = 0; |
3739 | (*cnt)--; |
3740 | } |
3741 | } |
3742 | } |
3743 | |
3744 | static void hci_tx_work(struct work_struct *work) |
3745 | { |
3746 | struct hci_dev *hdev = container_of(work, struct hci_dev, tx_work); |
3747 | struct sk_buff *skb; |
3748 | |
3749 | BT_DBG("%s acl %d sco %d le %d iso %d", hdev->name, hdev->acl_cnt, |
3750 | hdev->sco_cnt, hdev->le_cnt, hdev->iso_cnt); |
3751 | |
3752 | if (!hci_dev_test_flag(hdev, HCI_USER_CHANNEL)) { |
3753 | /* Schedule queues and send stuff to HCI driver */ |
3754 | hci_sched_sco(hdev, SCO_LINK); |
3755 | hci_sched_sco(hdev, ESCO_LINK); |
3756 | hci_sched_iso(hdev); |
3757 | hci_sched_acl(hdev); |
3758 | hci_sched_le(hdev); |
3759 | } |
3760 | |
3761 | /* Send next queued raw (unknown type) packet */ |
3762 | while ((skb = skb_dequeue(list: &hdev->raw_q))) |
3763 | hci_send_frame(hdev, skb); |
3764 | } |
3765 | |
3766 | /* ----- HCI RX task (incoming data processing) ----- */ |
3767 | |
3768 | /* ACL data packet */ |
3769 | static void hci_acldata_packet(struct hci_dev *hdev, struct sk_buff *skb) |
3770 | { |
3771 | struct hci_acl_hdr *hdr; |
3772 | struct hci_conn *conn; |
3773 | __u16 handle, flags; |
3774 | |
3775 | hdr = skb_pull_data(skb, len: sizeof(*hdr)); |
3776 | if (!hdr) { |
3777 | bt_dev_err(hdev, "ACL packet too small"); |
3778 | goto drop; |
3779 | } |
3780 | |
3781 | handle = __le16_to_cpu(hdr->handle); |
3782 | flags = hci_flags(handle); |
3783 | handle = hci_handle(handle); |
3784 | |
3785 | bt_dev_dbg(hdev, "len %d handle 0x%4.4x flags 0x%4.4x", skb->len, |
3786 | handle, flags); |
3787 | |
3788 | hdev->stat.acl_rx++; |
3789 | |
3790 | hci_dev_lock(hdev); |
3791 | conn = hci_conn_hash_lookup_handle(hdev, handle); |
3792 | hci_dev_unlock(hdev); |
3793 | |
3794 | if (conn) { |
3795 | hci_conn_enter_active_mode(conn, BT_POWER_FORCE_ACTIVE_OFF); |
3796 | |
3797 | /* Send to upper protocol */ |
3798 | l2cap_recv_acldata(hcon: conn, skb, flags); |
3799 | return; |
3800 | } else { |
3801 | bt_dev_err(hdev, "ACL packet for unknown connection handle %d", |
3802 | handle); |
3803 | } |
3804 | |
3805 | drop: |
3806 | kfree_skb(skb); |
3807 | } |
3808 | |
3809 | /* SCO data packet */ |
3810 | static void hci_scodata_packet(struct hci_dev *hdev, struct sk_buff *skb) |
3811 | { |
3812 | struct hci_sco_hdr *hdr; |
3813 | struct hci_conn *conn; |
3814 | __u16 handle, flags; |
3815 | |
3816 | hdr = skb_pull_data(skb, len: sizeof(*hdr)); |
3817 | if (!hdr) { |
3818 | bt_dev_err(hdev, "SCO packet too small"); |
3819 | goto drop; |
3820 | } |
3821 | |
3822 | handle = __le16_to_cpu(hdr->handle); |
3823 | flags = hci_flags(handle); |
3824 | handle = hci_handle(handle); |
3825 | |
3826 | bt_dev_dbg(hdev, "len %d handle 0x%4.4x flags 0x%4.4x", skb->len, |
3827 | handle, flags); |
3828 | |
3829 | hdev->stat.sco_rx++; |
3830 | |
3831 | hci_dev_lock(hdev); |
3832 | conn = hci_conn_hash_lookup_handle(hdev, handle); |
3833 | hci_dev_unlock(hdev); |
3834 | |
3835 | if (conn) { |
3836 | /* Send to upper protocol */ |
3837 | hci_skb_pkt_status(skb) = flags & 0x03; |
3838 | sco_recv_scodata(hcon: conn, skb); |
3839 | return; |
3840 | } else { |
3841 | bt_dev_err_ratelimited(hdev, "SCO packet for unknown connection handle %d", |
3842 | handle); |
3843 | } |
3844 | |
3845 | drop: |
3846 | kfree_skb(skb); |
3847 | } |
3848 | |
3849 | static void hci_isodata_packet(struct hci_dev *hdev, struct sk_buff *skb) |
3850 | { |
3851 | struct hci_iso_hdr *hdr; |
3852 | struct hci_conn *conn; |
3853 | __u16 handle, flags; |
3854 | |
3855 | hdr = skb_pull_data(skb, len: sizeof(*hdr)); |
3856 | if (!hdr) { |
3857 | bt_dev_err(hdev, "ISO packet too small"); |
3858 | goto drop; |
3859 | } |
3860 | |
3861 | handle = __le16_to_cpu(hdr->handle); |
3862 | flags = hci_flags(handle); |
3863 | handle = hci_handle(handle); |
3864 | |
3865 | bt_dev_dbg(hdev, "len %d handle 0x%4.4x flags 0x%4.4x", skb->len, |
3866 | handle, flags); |
3867 | |
3868 | hci_dev_lock(hdev); |
3869 | conn = hci_conn_hash_lookup_handle(hdev, handle); |
3870 | hci_dev_unlock(hdev); |
3871 | |
3872 | if (!conn) { |
3873 | bt_dev_err(hdev, "ISO packet for unknown connection handle %d", |
3874 | handle); |
3875 | goto drop; |
3876 | } |
3877 | |
3878 | /* Send to upper protocol */ |
3879 | iso_recv(hcon: conn, skb, flags); |
3880 | return; |
3881 | |
3882 | drop: |
3883 | kfree_skb(skb); |
3884 | } |
3885 | |
3886 | static bool hci_req_is_complete(struct hci_dev *hdev) |
3887 | { |
3888 | struct sk_buff *skb; |
3889 | |
3890 | skb = skb_peek(list_: &hdev->cmd_q); |
3891 | if (!skb) |
3892 | return true; |
3893 | |
3894 | return (bt_cb(skb)->hci.req_flags & HCI_REQ_START); |
3895 | } |
3896 | |
3897 | static void hci_resend_last(struct hci_dev *hdev) |
3898 | { |
3899 | struct hci_command_hdr *sent; |
3900 | struct sk_buff *skb; |
3901 | u16 opcode; |
3902 | |
3903 | if (!hdev->sent_cmd) |
3904 | return; |
3905 | |
3906 | sent = (void *) hdev->sent_cmd->data; |
3907 | opcode = __le16_to_cpu(sent->opcode); |
3908 | if (opcode == HCI_OP_RESET) |
3909 | return; |
3910 | |
3911 | skb = skb_clone(skb: hdev->sent_cmd, GFP_KERNEL); |
3912 | if (!skb) |
3913 | return; |
3914 | |
3915 | skb_queue_head(list: &hdev->cmd_q, newsk: skb); |
3916 | queue_work(wq: hdev->workqueue, work: &hdev->cmd_work); |
3917 | } |
3918 | |
3919 | void hci_req_cmd_complete(struct hci_dev *hdev, u16 opcode, u8 status, |
3920 | hci_req_complete_t *req_complete, |
3921 | hci_req_complete_skb_t *req_complete_skb) |
3922 | { |
3923 | struct sk_buff *skb; |
3924 | unsigned long flags; |
3925 | |
3926 | BT_DBG("opcode 0x%04x status 0x%02x", opcode, status); |
3927 | |
3928 | /* If the completed command doesn't match the last one that was |
3929 | * sent we need to do special handling of it. |
3930 | */ |
3931 | if (!hci_sent_cmd_data(hdev, opcode)) { |
3932 | /* Some CSR based controllers generate a spontaneous |
3933 | * reset complete event during init and any pending |
3934 | * command will never be completed. In such a case we |
3935 | * need to resend whatever was the last sent |
3936 | * command. |
3937 | */ |
3938 | if (test_bit(HCI_INIT, &hdev->flags) && opcode == HCI_OP_RESET) |
3939 | hci_resend_last(hdev); |
3940 | |
3941 | return; |
3942 | } |
3943 | |
3944 | /* If we reach this point this event matches the last command sent */ |
3945 | hci_dev_clear_flag(hdev, HCI_CMD_PENDING); |
3946 | |
3947 | /* If the command succeeded and there's still more commands in |
3948 | * this request the request is not yet complete. |
3949 | */ |
3950 | if (!status && !hci_req_is_complete(hdev)) |
3951 | return; |
3952 | |
3953 | skb = hdev->req_skb; |
3954 | |
3955 | /* If this was the last command in a request the complete |
3956 | * callback would be found in hdev->req_skb instead of the |
3957 | * command queue (hdev->cmd_q). |
3958 | */ |
3959 | if (skb && bt_cb(skb)->hci.req_flags & HCI_REQ_SKB) { |
3960 | *req_complete_skb = bt_cb(skb)->hci.req_complete_skb; |
3961 | return; |
3962 | } |
3963 | |
3964 | if (skb && bt_cb(skb)->hci.req_complete) { |
3965 | *req_complete = bt_cb(skb)->hci.req_complete; |
3966 | return; |
3967 | } |
3968 | |
3969 | /* Remove all pending commands belonging to this request */ |
3970 | spin_lock_irqsave(&hdev->cmd_q.lock, flags); |
3971 | while ((skb = __skb_dequeue(list: &hdev->cmd_q))) { |
3972 | if (bt_cb(skb)->hci.req_flags & HCI_REQ_START) { |
3973 | __skb_queue_head(list: &hdev->cmd_q, newsk: skb); |
3974 | break; |
3975 | } |
3976 | |
3977 | if (bt_cb(skb)->hci.req_flags & HCI_REQ_SKB) |
3978 | *req_complete_skb = bt_cb(skb)->hci.req_complete_skb; |
3979 | else |
3980 | *req_complete = bt_cb(skb)->hci.req_complete; |
3981 | dev_kfree_skb_irq(skb); |
3982 | } |
3983 | spin_unlock_irqrestore(lock: &hdev->cmd_q.lock, flags); |
3984 | } |
3985 | |
3986 | static void hci_rx_work(struct work_struct *work) |
3987 | { |
3988 | struct hci_dev *hdev = container_of(work, struct hci_dev, rx_work); |
3989 | struct sk_buff *skb; |
3990 | |
3991 | BT_DBG("%s", hdev->name); |
3992 | |
3993 | /* The kcov_remote functions used for collecting packet parsing |
3994 | * coverage information from this background thread and associate |
3995 | * the coverage with the syscall's thread which originally injected |
3996 | * the packet. This helps fuzzing the kernel. |
3997 | */ |
3998 | for (; (skb = skb_dequeue(list: &hdev->rx_q)); kcov_remote_stop()) { |
3999 | kcov_remote_start_common(id: skb_get_kcov_handle(skb)); |
4000 | |
4001 | /* Send copy to monitor */ |
4002 | hci_send_to_monitor(hdev, skb); |
4003 | |
4004 | if (atomic_read(v: &hdev->promisc)) { |
4005 | /* Send copy to the sockets */ |
4006 | hci_send_to_sock(hdev, skb); |
4007 | } |
4008 | |
4009 | /* If the device has been opened in HCI_USER_CHANNEL, |
4010 | * the userspace has exclusive access to device. |
4011 | * When device is HCI_INIT, we still need to process |
4012 | * the data packets to the driver in order |
4013 | * to complete its setup(). |
4014 | */ |
4015 | if (hci_dev_test_flag(hdev, HCI_USER_CHANNEL) && |
4016 | !test_bit(HCI_INIT, &hdev->flags)) { |
4017 | kfree_skb(skb); |
4018 | continue; |
4019 | } |
4020 | |
4021 | if (test_bit(HCI_INIT, &hdev->flags)) { |
4022 | /* Don't process data packets in this states. */ |
4023 | switch (hci_skb_pkt_type(skb)) { |
4024 | case HCI_ACLDATA_PKT: |
4025 | case HCI_SCODATA_PKT: |
4026 | case HCI_ISODATA_PKT: |
4027 | kfree_skb(skb); |
4028 | continue; |
4029 | } |
4030 | } |
4031 | |
4032 | /* Process frame */ |
4033 | switch (hci_skb_pkt_type(skb)) { |
4034 | case HCI_EVENT_PKT: |
4035 | BT_DBG("%s Event packet", hdev->name); |
4036 | hci_event_packet(hdev, skb); |
4037 | break; |
4038 | |
4039 | case HCI_ACLDATA_PKT: |
4040 | BT_DBG("%s ACL data packet", hdev->name); |
4041 | hci_acldata_packet(hdev, skb); |
4042 | break; |
4043 | |
4044 | case HCI_SCODATA_PKT: |
4045 | BT_DBG("%s SCO data packet", hdev->name); |
4046 | hci_scodata_packet(hdev, skb); |
4047 | break; |
4048 | |
4049 | case HCI_ISODATA_PKT: |
4050 | BT_DBG("%s ISO data packet", hdev->name); |
4051 | hci_isodata_packet(hdev, skb); |
4052 | break; |
4053 | |
4054 | default: |
4055 | kfree_skb(skb); |
4056 | break; |
4057 | } |
4058 | } |
4059 | } |
4060 | |
4061 | static void hci_send_cmd_sync(struct hci_dev *hdev, struct sk_buff *skb) |
4062 | { |
4063 | int err; |
4064 | |
4065 | bt_dev_dbg(hdev, "skb %p", skb); |
4066 | |
4067 | kfree_skb(skb: hdev->sent_cmd); |
4068 | |
4069 | hdev->sent_cmd = skb_clone(skb, GFP_KERNEL); |
4070 | if (!hdev->sent_cmd) { |
4071 | skb_queue_head(list: &hdev->cmd_q, newsk: skb); |
4072 | queue_work(wq: hdev->workqueue, work: &hdev->cmd_work); |
4073 | return; |
4074 | } |
4075 | |
4076 | if (hci_skb_opcode(skb) != HCI_OP_NOP) { |
4077 | err = hci_send_frame(hdev, skb); |
4078 | if (err < 0) { |
4079 | hci_cmd_sync_cancel_sync(hdev, err: -err); |
4080 | return; |
4081 | } |
4082 | atomic_dec(v: &hdev->cmd_cnt); |
4083 | } |
4084 | |
4085 | if (hdev->req_status == HCI_REQ_PEND && |
4086 | !hci_dev_test_and_set_flag(hdev, HCI_CMD_PENDING)) { |
4087 | kfree_skb(skb: hdev->req_skb); |
4088 | hdev->req_skb = skb_clone(skb: hdev->sent_cmd, GFP_KERNEL); |
4089 | } |
4090 | } |
4091 | |
4092 | static void hci_cmd_work(struct work_struct *work) |
4093 | { |
4094 | struct hci_dev *hdev = container_of(work, struct hci_dev, cmd_work); |
4095 | struct sk_buff *skb; |
4096 | |
4097 | BT_DBG("%s cmd_cnt %d cmd queued %d", hdev->name, |
4098 | atomic_read(&hdev->cmd_cnt), skb_queue_len(&hdev->cmd_q)); |
4099 | |
4100 | /* Send queued commands */ |
4101 | if (atomic_read(v: &hdev->cmd_cnt)) { |
4102 | skb = skb_dequeue(list: &hdev->cmd_q); |
4103 | if (!skb) |
4104 | return; |
4105 | |
4106 | hci_send_cmd_sync(hdev, skb); |
4107 | |
4108 | rcu_read_lock(); |
4109 | if (test_bit(HCI_RESET, &hdev->flags) || |
4110 | hci_dev_test_flag(hdev, HCI_CMD_DRAIN_WORKQUEUE)) |
4111 | cancel_delayed_work(dwork: &hdev->cmd_timer); |
4112 | else |
4113 | queue_delayed_work(wq: hdev->workqueue, dwork: &hdev->cmd_timer, |
4114 | HCI_CMD_TIMEOUT); |
4115 | rcu_read_unlock(); |
4116 | } |
4117 | } |
4118 |
Definitions
- hci_dev_list
- hci_dev_list_lock
- hci_cb_list
- hci_cb_list_lock
- hci_index_ida
- hci_dev_get
- hci_discovery_active
- hci_discovery_set_state
- hci_inquiry_cache_flush
- hci_inquiry_cache_lookup
- hci_inquiry_cache_lookup_unknown
- hci_inquiry_cache_lookup_resolve
- hci_inquiry_cache_update_resolve
- hci_inquiry_cache_update
- inquiry_cache_dump
- hci_inquiry
- hci_dev_do_open
- hci_dev_open
- hci_dev_do_close
- hci_dev_close
- hci_dev_do_reset
- hci_dev_reset
- hci_dev_reset_stat
- hci_update_passive_scan_state
- hci_dev_cmd
- hci_get_dev_list
- hci_get_dev_info
- hci_dev_do_poweroff
- hci_rfkill_set_block
- hci_rfkill_ops
- hci_power_on
- hci_power_off
- hci_error_reset
- hci_uuids_clear
- hci_link_keys_clear
- hci_smp_ltks_clear
- hci_smp_irks_clear
- hci_blocked_keys_clear
- hci_is_blocked_key
- hci_find_link_key
- hci_persistent_key
- ltk_role
- hci_find_ltk
- hci_find_irk_by_rpa
- hci_find_irk_by_addr
- hci_add_link_key
- hci_add_ltk
- hci_add_irk
- hci_remove_link_key
- hci_remove_ltk
- hci_remove_irk
- hci_bdaddr_is_paired
- hci_cmd_timeout
- hci_ncmd_timeout
- hci_find_remote_oob_data
- hci_remove_remote_oob_data
- hci_remote_oob_data_clear
- hci_add_remote_oob_data
- hci_find_adv_instance
- hci_get_next_instance
- hci_remove_adv_instance
- hci_adv_instances_set_rpa_expired
- hci_adv_instances_clear
- adv_instance_rpa_expired
- hci_add_adv_instance
- hci_add_per_instance
- hci_set_adv_instance_data
- hci_adv_instance_flags
- hci_adv_instance_is_scannable
- hci_adv_monitors_clear
- hci_free_adv_monitor
- hci_add_adv_monitor
- hci_remove_adv_monitor
- hci_remove_single_adv_monitor
- hci_remove_all_adv_monitor
- hci_is_adv_monitoring
- hci_get_adv_monitor_offload_ext
- hci_bdaddr_list_lookup
- hci_bdaddr_list_lookup_with_irk
- hci_bdaddr_list_lookup_with_flags
- hci_bdaddr_list_clear
- hci_bdaddr_list_add
- hci_bdaddr_list_add_with_irk
- hci_bdaddr_list_add_with_flags
- hci_bdaddr_list_del
- hci_bdaddr_list_del_with_irk
- hci_conn_params_lookup
- hci_pend_le_action_lookup
- hci_pend_le_list_del_init
- hci_pend_le_list_add
- hci_conn_params_add
- hci_conn_params_free
- hci_conn_params_del
- hci_conn_params_clear_disabled
- hci_conn_params_clear_all
- hci_copy_identity_address
- hci_clear_wake_reason
- hci_suspend_notifier
- hci_alloc_dev_priv
- hci_free_dev
- hci_register_dev
- hci_unregister_dev
- hci_release_dev
- hci_register_suspend_notifier
- hci_unregister_suspend_notifier
- hci_cancel_cmd_sync
- hci_suspend_dev
- hci_resume_dev
- hci_reset_dev
- hci_dev_classify_pkt_type
- hci_recv_frame
- hci_recv_diag
- hci_set_hw_info
- hci_set_fw_info
- hci_register_cb
- hci_unregister_cb
- hci_send_frame
- hci_send_conn_frame
- hci_send_cmd
- __hci_cmd_send
- hci_cmd_data
- hci_sent_cmd_data
- hci_recv_event_data
- hci_add_acl_hdr
- hci_queue_acl
- hci_send_acl
- hci_send_sco
- hci_add_iso_hdr
- hci_queue_iso
- hci_send_iso
- hci_quote_sent
- hci_low_sent
- hci_link_tx_to
- hci_chan_sent
- hci_prio_recalculate
- __check_timeout
- hci_sched_sco
- hci_sched_acl_pkt
- hci_sched_acl
- hci_sched_le
- hci_sched_iso
- hci_tx_work
- hci_acldata_packet
- hci_scodata_packet
- hci_isodata_packet
- hci_req_is_complete
- hci_resend_last
- hci_req_cmd_complete
- hci_rx_work
- hci_send_cmd_sync
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