1/*
2 BlueZ - Bluetooth protocol stack for Linux
3
4 Copyright (C) 2014 Intel Corporation
5
6 This program is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License version 2 as
8 published by the Free Software Foundation;
9
10 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
11 OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
12 FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT OF THIRD PARTY RIGHTS.
13 IN NO EVENT SHALL THE COPYRIGHT HOLDER(S) AND AUTHOR(S) BE LIABLE FOR ANY
14 CLAIM, OR ANY SPECIAL INDIRECT OR CONSEQUENTIAL DAMAGES, OR ANY DAMAGES
15 WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
16 ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
17 OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
18
19 ALL LIABILITY, INCLUDING LIABILITY FOR INFRINGEMENT OF ANY PATENTS,
20 COPYRIGHTS, TRADEMARKS OR OTHER RIGHTS, RELATING TO USE OF THIS
21 SOFTWARE IS DISCLAIMED.
22*/
23
24#include <linux/debugfs.h>
25#include <linux/kstrtox.h>
26
27#include <net/bluetooth/bluetooth.h>
28#include <net/bluetooth/hci_core.h>
29
30#include "smp.h"
31#include "hci_request.h"
32#include "hci_debugfs.h"
33
34#define DEFINE_QUIRK_ATTRIBUTE(__name, __quirk) \
35static ssize_t __name ## _read(struct file *file, \
36 char __user *user_buf, \
37 size_t count, loff_t *ppos) \
38{ \
39 struct hci_dev *hdev = file->private_data; \
40 char buf[3]; \
41 \
42 buf[0] = test_bit(__quirk, &hdev->quirks) ? 'Y' : 'N'; \
43 buf[1] = '\n'; \
44 buf[2] = '\0'; \
45 return simple_read_from_buffer(user_buf, count, ppos, buf, 2); \
46} \
47 \
48static ssize_t __name ## _write(struct file *file, \
49 const char __user *user_buf, \
50 size_t count, loff_t *ppos) \
51{ \
52 struct hci_dev *hdev = file->private_data; \
53 bool enable; \
54 int err; \
55 \
56 if (test_bit(HCI_UP, &hdev->flags)) \
57 return -EBUSY; \
58 \
59 err = kstrtobool_from_user(user_buf, count, &enable); \
60 if (err) \
61 return err; \
62 \
63 if (enable == test_bit(__quirk, &hdev->quirks)) \
64 return -EALREADY; \
65 \
66 change_bit(__quirk, &hdev->quirks); \
67 \
68 return count; \
69} \
70 \
71static const struct file_operations __name ## _fops = { \
72 .open = simple_open, \
73 .read = __name ## _read, \
74 .write = __name ## _write, \
75 .llseek = default_llseek, \
76} \
77
78#define DEFINE_INFO_ATTRIBUTE(__name, __field) \
79static int __name ## _show(struct seq_file *f, void *ptr) \
80{ \
81 struct hci_dev *hdev = f->private; \
82 \
83 hci_dev_lock(hdev); \
84 seq_printf(f, "%s\n", hdev->__field ? : ""); \
85 hci_dev_unlock(hdev); \
86 \
87 return 0; \
88} \
89 \
90DEFINE_SHOW_ATTRIBUTE(__name)
91
92static int features_show(struct seq_file *f, void *ptr)
93{
94 struct hci_dev *hdev = f->private;
95 u8 p;
96
97 hci_dev_lock(hdev);
98 for (p = 0; p < HCI_MAX_PAGES && p <= hdev->max_page; p++)
99 seq_printf(m: f, fmt: "%2u: %8ph\n", p, hdev->features[p]);
100 if (lmp_le_capable(hdev))
101 seq_printf(m: f, fmt: "LE: %8ph\n", hdev->le_features);
102 hci_dev_unlock(hdev);
103
104 return 0;
105}
106
107DEFINE_SHOW_ATTRIBUTE(features);
108
109static int device_id_show(struct seq_file *f, void *ptr)
110{
111 struct hci_dev *hdev = f->private;
112
113 hci_dev_lock(hdev);
114 seq_printf(m: f, fmt: "%4.4x:%4.4x:%4.4x:%4.4x\n", hdev->devid_source,
115 hdev->devid_vendor, hdev->devid_product, hdev->devid_version);
116 hci_dev_unlock(hdev);
117
118 return 0;
119}
120
121DEFINE_SHOW_ATTRIBUTE(device_id);
122
123static int device_list_show(struct seq_file *f, void *ptr)
124{
125 struct hci_dev *hdev = f->private;
126 struct hci_conn_params *p;
127 struct bdaddr_list *b;
128
129 hci_dev_lock(hdev);
130 list_for_each_entry(b, &hdev->accept_list, list)
131 seq_printf(m: f, fmt: "%pMR (type %u)\n", &b->bdaddr, b->bdaddr_type);
132 list_for_each_entry(p, &hdev->le_conn_params, list) {
133 seq_printf(m: f, fmt: "%pMR (type %u) %u\n", &p->addr, p->addr_type,
134 p->auto_connect);
135 }
136 hci_dev_unlock(hdev);
137
138 return 0;
139}
140
141DEFINE_SHOW_ATTRIBUTE(device_list);
142
143static int blacklist_show(struct seq_file *f, void *p)
144{
145 struct hci_dev *hdev = f->private;
146 struct bdaddr_list *b;
147
148 hci_dev_lock(hdev);
149 list_for_each_entry(b, &hdev->reject_list, list)
150 seq_printf(m: f, fmt: "%pMR (type %u)\n", &b->bdaddr, b->bdaddr_type);
151 hci_dev_unlock(hdev);
152
153 return 0;
154}
155
156DEFINE_SHOW_ATTRIBUTE(blacklist);
157
158static int blocked_keys_show(struct seq_file *f, void *p)
159{
160 struct hci_dev *hdev = f->private;
161 struct blocked_key *key;
162
163 rcu_read_lock();
164 list_for_each_entry_rcu(key, &hdev->blocked_keys, list)
165 seq_printf(m: f, fmt: "%u %*phN\n", key->type, 16, key->val);
166 rcu_read_unlock();
167
168 return 0;
169}
170
171DEFINE_SHOW_ATTRIBUTE(blocked_keys);
172
173static int uuids_show(struct seq_file *f, void *p)
174{
175 struct hci_dev *hdev = f->private;
176 struct bt_uuid *uuid;
177
178 hci_dev_lock(hdev);
179 list_for_each_entry(uuid, &hdev->uuids, list) {
180 u8 i, val[16];
181
182 /* The Bluetooth UUID values are stored in big endian,
183 * but with reversed byte order. So convert them into
184 * the right order for the %pUb modifier.
185 */
186 for (i = 0; i < 16; i++)
187 val[i] = uuid->uuid[15 - i];
188
189 seq_printf(m: f, fmt: "%pUb\n", val);
190 }
191 hci_dev_unlock(hdev);
192
193 return 0;
194}
195
196DEFINE_SHOW_ATTRIBUTE(uuids);
197
198static int remote_oob_show(struct seq_file *f, void *ptr)
199{
200 struct hci_dev *hdev = f->private;
201 struct oob_data *data;
202
203 hci_dev_lock(hdev);
204 list_for_each_entry(data, &hdev->remote_oob_data, list) {
205 seq_printf(m: f, fmt: "%pMR (type %u) %u %*phN %*phN %*phN %*phN\n",
206 &data->bdaddr, data->bdaddr_type, data->present,
207 16, data->hash192, 16, data->rand192,
208 16, data->hash256, 16, data->rand256);
209 }
210 hci_dev_unlock(hdev);
211
212 return 0;
213}
214
215DEFINE_SHOW_ATTRIBUTE(remote_oob);
216
217static int conn_info_min_age_set(void *data, u64 val)
218{
219 struct hci_dev *hdev = data;
220
221 if (val == 0 || val > hdev->conn_info_max_age)
222 return -EINVAL;
223
224 hci_dev_lock(hdev);
225 hdev->conn_info_min_age = val;
226 hci_dev_unlock(hdev);
227
228 return 0;
229}
230
231static int conn_info_min_age_get(void *data, u64 *val)
232{
233 struct hci_dev *hdev = data;
234
235 hci_dev_lock(hdev);
236 *val = hdev->conn_info_min_age;
237 hci_dev_unlock(hdev);
238
239 return 0;
240}
241
242DEFINE_DEBUGFS_ATTRIBUTE(conn_info_min_age_fops, conn_info_min_age_get,
243 conn_info_min_age_set, "%llu\n");
244
245static int conn_info_max_age_set(void *data, u64 val)
246{
247 struct hci_dev *hdev = data;
248
249 if (val == 0 || val < hdev->conn_info_min_age)
250 return -EINVAL;
251
252 hci_dev_lock(hdev);
253 hdev->conn_info_max_age = val;
254 hci_dev_unlock(hdev);
255
256 return 0;
257}
258
259static int conn_info_max_age_get(void *data, u64 *val)
260{
261 struct hci_dev *hdev = data;
262
263 hci_dev_lock(hdev);
264 *val = hdev->conn_info_max_age;
265 hci_dev_unlock(hdev);
266
267 return 0;
268}
269
270DEFINE_DEBUGFS_ATTRIBUTE(conn_info_max_age_fops, conn_info_max_age_get,
271 conn_info_max_age_set, "%llu\n");
272
273static ssize_t use_debug_keys_read(struct file *file, char __user *user_buf,
274 size_t count, loff_t *ppos)
275{
276 struct hci_dev *hdev = file->private_data;
277 char buf[3];
278
279 buf[0] = hci_dev_test_flag(hdev, HCI_USE_DEBUG_KEYS) ? 'Y' : 'N';
280 buf[1] = '\n';
281 buf[2] = '\0';
282 return simple_read_from_buffer(to: user_buf, count, ppos, from: buf, available: 2);
283}
284
285static const struct file_operations use_debug_keys_fops = {
286 .open = simple_open,
287 .read = use_debug_keys_read,
288 .llseek = default_llseek,
289};
290
291static ssize_t sc_only_mode_read(struct file *file, char __user *user_buf,
292 size_t count, loff_t *ppos)
293{
294 struct hci_dev *hdev = file->private_data;
295 char buf[3];
296
297 buf[0] = hci_dev_test_flag(hdev, HCI_SC_ONLY) ? 'Y' : 'N';
298 buf[1] = '\n';
299 buf[2] = '\0';
300 return simple_read_from_buffer(to: user_buf, count, ppos, from: buf, available: 2);
301}
302
303static const struct file_operations sc_only_mode_fops = {
304 .open = simple_open,
305 .read = sc_only_mode_read,
306 .llseek = default_llseek,
307};
308
309DEFINE_INFO_ATTRIBUTE(hardware_info, hw_info);
310DEFINE_INFO_ATTRIBUTE(firmware_info, fw_info);
311
312void hci_debugfs_create_common(struct hci_dev *hdev)
313{
314 debugfs_create_file(name: "features", mode: 0444, parent: hdev->debugfs, data: hdev,
315 fops: &features_fops);
316 debugfs_create_u16(name: "manufacturer", mode: 0444, parent: hdev->debugfs,
317 value: &hdev->manufacturer);
318 debugfs_create_u8(name: "hci_version", mode: 0444, parent: hdev->debugfs, value: &hdev->hci_ver);
319 debugfs_create_u16(name: "hci_revision", mode: 0444, parent: hdev->debugfs, value: &hdev->hci_rev);
320 debugfs_create_u8(name: "hardware_error", mode: 0444, parent: hdev->debugfs,
321 value: &hdev->hw_error_code);
322 debugfs_create_file(name: "device_id", mode: 0444, parent: hdev->debugfs, data: hdev,
323 fops: &device_id_fops);
324
325 debugfs_create_file(name: "device_list", mode: 0444, parent: hdev->debugfs, data: hdev,
326 fops: &device_list_fops);
327 debugfs_create_file(name: "blacklist", mode: 0444, parent: hdev->debugfs, data: hdev,
328 fops: &blacklist_fops);
329 debugfs_create_file(name: "blocked_keys", mode: 0444, parent: hdev->debugfs, data: hdev,
330 fops: &blocked_keys_fops);
331 debugfs_create_file(name: "uuids", mode: 0444, parent: hdev->debugfs, data: hdev, fops: &uuids_fops);
332 debugfs_create_file(name: "remote_oob", mode: 0400, parent: hdev->debugfs, data: hdev,
333 fops: &remote_oob_fops);
334
335 debugfs_create_file(name: "conn_info_min_age", mode: 0644, parent: hdev->debugfs, data: hdev,
336 fops: &conn_info_min_age_fops);
337 debugfs_create_file(name: "conn_info_max_age", mode: 0644, parent: hdev->debugfs, data: hdev,
338 fops: &conn_info_max_age_fops);
339
340 if (lmp_ssp_capable(hdev) || lmp_le_capable(hdev))
341 debugfs_create_file(name: "use_debug_keys", mode: 0444, parent: hdev->debugfs,
342 data: hdev, fops: &use_debug_keys_fops);
343
344 if (lmp_sc_capable(hdev) || lmp_le_capable(hdev))
345 debugfs_create_file(name: "sc_only_mode", mode: 0444, parent: hdev->debugfs,
346 data: hdev, fops: &sc_only_mode_fops);
347
348 if (hdev->hw_info)
349 debugfs_create_file(name: "hardware_info", mode: 0444, parent: hdev->debugfs,
350 data: hdev, fops: &hardware_info_fops);
351
352 if (hdev->fw_info)
353 debugfs_create_file(name: "firmware_info", mode: 0444, parent: hdev->debugfs,
354 data: hdev, fops: &firmware_info_fops);
355}
356
357static int inquiry_cache_show(struct seq_file *f, void *p)
358{
359 struct hci_dev *hdev = f->private;
360 struct discovery_state *cache = &hdev->discovery;
361 struct inquiry_entry *e;
362
363 hci_dev_lock(hdev);
364
365 list_for_each_entry(e, &cache->all, all) {
366 struct inquiry_data *data = &e->data;
367 seq_printf(m: f, fmt: "%pMR %d %d %d 0x%.2x%.2x%.2x 0x%.4x %d %d %u\n",
368 &data->bdaddr,
369 data->pscan_rep_mode, data->pscan_period_mode,
370 data->pscan_mode, data->dev_class[2],
371 data->dev_class[1], data->dev_class[0],
372 __le16_to_cpu(data->clock_offset),
373 data->rssi, data->ssp_mode, e->timestamp);
374 }
375
376 hci_dev_unlock(hdev);
377
378 return 0;
379}
380
381DEFINE_SHOW_ATTRIBUTE(inquiry_cache);
382
383static int link_keys_show(struct seq_file *f, void *ptr)
384{
385 struct hci_dev *hdev = f->private;
386 struct link_key *key;
387
388 rcu_read_lock();
389 list_for_each_entry_rcu(key, &hdev->link_keys, list)
390 seq_printf(m: f, fmt: "%pMR %u %*phN %u\n", &key->bdaddr, key->type,
391 HCI_LINK_KEY_SIZE, key->val, key->pin_len);
392 rcu_read_unlock();
393
394 return 0;
395}
396
397DEFINE_SHOW_ATTRIBUTE(link_keys);
398
399static int dev_class_show(struct seq_file *f, void *ptr)
400{
401 struct hci_dev *hdev = f->private;
402
403 hci_dev_lock(hdev);
404 seq_printf(m: f, fmt: "0x%.2x%.2x%.2x\n", hdev->dev_class[2],
405 hdev->dev_class[1], hdev->dev_class[0]);
406 hci_dev_unlock(hdev);
407
408 return 0;
409}
410
411DEFINE_SHOW_ATTRIBUTE(dev_class);
412
413static int voice_setting_get(void *data, u64 *val)
414{
415 struct hci_dev *hdev = data;
416
417 hci_dev_lock(hdev);
418 *val = hdev->voice_setting;
419 hci_dev_unlock(hdev);
420
421 return 0;
422}
423
424DEFINE_DEBUGFS_ATTRIBUTE(voice_setting_fops, voice_setting_get,
425 NULL, "0x%4.4llx\n");
426
427static ssize_t ssp_debug_mode_read(struct file *file, char __user *user_buf,
428 size_t count, loff_t *ppos)
429{
430 struct hci_dev *hdev = file->private_data;
431 char buf[3];
432
433 buf[0] = hdev->ssp_debug_mode ? 'Y' : 'N';
434 buf[1] = '\n';
435 buf[2] = '\0';
436 return simple_read_from_buffer(to: user_buf, count, ppos, from: buf, available: 2);
437}
438
439static const struct file_operations ssp_debug_mode_fops = {
440 .open = simple_open,
441 .read = ssp_debug_mode_read,
442 .llseek = default_llseek,
443};
444
445static int auto_accept_delay_set(void *data, u64 val)
446{
447 struct hci_dev *hdev = data;
448
449 hci_dev_lock(hdev);
450 hdev->auto_accept_delay = val;
451 hci_dev_unlock(hdev);
452
453 return 0;
454}
455
456static int min_encrypt_key_size_set(void *data, u64 val)
457{
458 struct hci_dev *hdev = data;
459
460 if (val < 1 || val > 16)
461 return -EINVAL;
462
463 hci_dev_lock(hdev);
464 hdev->min_enc_key_size = val;
465 hci_dev_unlock(hdev);
466
467 return 0;
468}
469
470static int min_encrypt_key_size_get(void *data, u64 *val)
471{
472 struct hci_dev *hdev = data;
473
474 hci_dev_lock(hdev);
475 *val = hdev->min_enc_key_size;
476 hci_dev_unlock(hdev);
477
478 return 0;
479}
480
481DEFINE_DEBUGFS_ATTRIBUTE(min_encrypt_key_size_fops,
482 min_encrypt_key_size_get,
483 min_encrypt_key_size_set, "%llu\n");
484
485static int auto_accept_delay_get(void *data, u64 *val)
486{
487 struct hci_dev *hdev = data;
488
489 hci_dev_lock(hdev);
490 *val = hdev->auto_accept_delay;
491 hci_dev_unlock(hdev);
492
493 return 0;
494}
495
496DEFINE_DEBUGFS_ATTRIBUTE(auto_accept_delay_fops, auto_accept_delay_get,
497 auto_accept_delay_set, "%llu\n");
498
499static ssize_t force_bredr_smp_read(struct file *file,
500 char __user *user_buf,
501 size_t count, loff_t *ppos)
502{
503 struct hci_dev *hdev = file->private_data;
504 char buf[3];
505
506 buf[0] = hci_dev_test_flag(hdev, HCI_FORCE_BREDR_SMP) ? 'Y' : 'N';
507 buf[1] = '\n';
508 buf[2] = '\0';
509 return simple_read_from_buffer(to: user_buf, count, ppos, from: buf, available: 2);
510}
511
512static ssize_t force_bredr_smp_write(struct file *file,
513 const char __user *user_buf,
514 size_t count, loff_t *ppos)
515{
516 struct hci_dev *hdev = file->private_data;
517 bool enable;
518 int err;
519
520 err = kstrtobool_from_user(s: user_buf, count, res: &enable);
521 if (err)
522 return err;
523
524 err = smp_force_bredr(hdev, enable);
525 if (err)
526 return err;
527
528 return count;
529}
530
531static const struct file_operations force_bredr_smp_fops = {
532 .open = simple_open,
533 .read = force_bredr_smp_read,
534 .write = force_bredr_smp_write,
535 .llseek = default_llseek,
536};
537
538static int idle_timeout_set(void *data, u64 val)
539{
540 struct hci_dev *hdev = data;
541
542 if (val != 0 && (val < 500 || val > 3600000))
543 return -EINVAL;
544
545 hci_dev_lock(hdev);
546 hdev->idle_timeout = val;
547 hci_dev_unlock(hdev);
548
549 return 0;
550}
551
552static int idle_timeout_get(void *data, u64 *val)
553{
554 struct hci_dev *hdev = data;
555
556 hci_dev_lock(hdev);
557 *val = hdev->idle_timeout;
558 hci_dev_unlock(hdev);
559
560 return 0;
561}
562
563DEFINE_DEBUGFS_ATTRIBUTE(idle_timeout_fops, idle_timeout_get,
564 idle_timeout_set, "%llu\n");
565
566static int sniff_min_interval_set(void *data, u64 val)
567{
568 struct hci_dev *hdev = data;
569
570 if (val == 0 || val % 2 || val > hdev->sniff_max_interval)
571 return -EINVAL;
572
573 hci_dev_lock(hdev);
574 hdev->sniff_min_interval = val;
575 hci_dev_unlock(hdev);
576
577 return 0;
578}
579
580static int sniff_min_interval_get(void *data, u64 *val)
581{
582 struct hci_dev *hdev = data;
583
584 hci_dev_lock(hdev);
585 *val = hdev->sniff_min_interval;
586 hci_dev_unlock(hdev);
587
588 return 0;
589}
590
591DEFINE_DEBUGFS_ATTRIBUTE(sniff_min_interval_fops, sniff_min_interval_get,
592 sniff_min_interval_set, "%llu\n");
593
594static int sniff_max_interval_set(void *data, u64 val)
595{
596 struct hci_dev *hdev = data;
597
598 if (val == 0 || val % 2 || val < hdev->sniff_min_interval)
599 return -EINVAL;
600
601 hci_dev_lock(hdev);
602 hdev->sniff_max_interval = val;
603 hci_dev_unlock(hdev);
604
605 return 0;
606}
607
608static int sniff_max_interval_get(void *data, u64 *val)
609{
610 struct hci_dev *hdev = data;
611
612 hci_dev_lock(hdev);
613 *val = hdev->sniff_max_interval;
614 hci_dev_unlock(hdev);
615
616 return 0;
617}
618
619DEFINE_DEBUGFS_ATTRIBUTE(sniff_max_interval_fops, sniff_max_interval_get,
620 sniff_max_interval_set, "%llu\n");
621
622void hci_debugfs_create_bredr(struct hci_dev *hdev)
623{
624 debugfs_create_file(name: "inquiry_cache", mode: 0444, parent: hdev->debugfs, data: hdev,
625 fops: &inquiry_cache_fops);
626 debugfs_create_file(name: "link_keys", mode: 0400, parent: hdev->debugfs, data: hdev,
627 fops: &link_keys_fops);
628 debugfs_create_file(name: "dev_class", mode: 0444, parent: hdev->debugfs, data: hdev,
629 fops: &dev_class_fops);
630 debugfs_create_file(name: "voice_setting", mode: 0444, parent: hdev->debugfs, data: hdev,
631 fops: &voice_setting_fops);
632
633 /* If the controller does not support BR/EDR Secure Connections
634 * feature, then the BR/EDR SMP channel shall not be present.
635 *
636 * To test this with Bluetooth 4.0 controllers, create a debugfs
637 * switch that allows forcing BR/EDR SMP support and accepting
638 * cross-transport pairing on non-AES encrypted connections.
639 */
640 if (!lmp_sc_capable(hdev))
641 debugfs_create_file(name: "force_bredr_smp", mode: 0644, parent: hdev->debugfs,
642 data: hdev, fops: &force_bredr_smp_fops);
643
644 if (lmp_ssp_capable(hdev)) {
645 debugfs_create_file(name: "ssp_debug_mode", mode: 0444, parent: hdev->debugfs,
646 data: hdev, fops: &ssp_debug_mode_fops);
647 debugfs_create_file(name: "min_encrypt_key_size", mode: 0644, parent: hdev->debugfs,
648 data: hdev, fops: &min_encrypt_key_size_fops);
649 debugfs_create_file(name: "auto_accept_delay", mode: 0644, parent: hdev->debugfs,
650 data: hdev, fops: &auto_accept_delay_fops);
651 }
652
653 if (lmp_sniff_capable(hdev)) {
654 debugfs_create_file(name: "idle_timeout", mode: 0644, parent: hdev->debugfs,
655 data: hdev, fops: &idle_timeout_fops);
656 debugfs_create_file(name: "sniff_min_interval", mode: 0644, parent: hdev->debugfs,
657 data: hdev, fops: &sniff_min_interval_fops);
658 debugfs_create_file(name: "sniff_max_interval", mode: 0644, parent: hdev->debugfs,
659 data: hdev, fops: &sniff_max_interval_fops);
660 }
661}
662
663static int identity_show(struct seq_file *f, void *p)
664{
665 struct hci_dev *hdev = f->private;
666 bdaddr_t addr;
667 u8 addr_type;
668
669 hci_dev_lock(hdev);
670
671 hci_copy_identity_address(hdev, bdaddr: &addr, bdaddr_type: &addr_type);
672
673 seq_printf(m: f, fmt: "%pMR (type %u) %*phN %pMR\n", &addr, addr_type,
674 16, hdev->irk, &hdev->rpa);
675
676 hci_dev_unlock(hdev);
677
678 return 0;
679}
680
681DEFINE_SHOW_ATTRIBUTE(identity);
682
683static int rpa_timeout_set(void *data, u64 val)
684{
685 struct hci_dev *hdev = data;
686
687 /* Require the RPA timeout to be at least 30 seconds and at most
688 * 24 hours.
689 */
690 if (val < 30 || val > (60 * 60 * 24))
691 return -EINVAL;
692
693 hci_dev_lock(hdev);
694 hdev->rpa_timeout = val;
695 hci_dev_unlock(hdev);
696
697 return 0;
698}
699
700static int rpa_timeout_get(void *data, u64 *val)
701{
702 struct hci_dev *hdev = data;
703
704 hci_dev_lock(hdev);
705 *val = hdev->rpa_timeout;
706 hci_dev_unlock(hdev);
707
708 return 0;
709}
710
711DEFINE_DEBUGFS_ATTRIBUTE(rpa_timeout_fops, rpa_timeout_get,
712 rpa_timeout_set, "%llu\n");
713
714static int random_address_show(struct seq_file *f, void *p)
715{
716 struct hci_dev *hdev = f->private;
717
718 hci_dev_lock(hdev);
719 seq_printf(m: f, fmt: "%pMR\n", &hdev->random_addr);
720 hci_dev_unlock(hdev);
721
722 return 0;
723}
724
725DEFINE_SHOW_ATTRIBUTE(random_address);
726
727static int static_address_show(struct seq_file *f, void *p)
728{
729 struct hci_dev *hdev = f->private;
730
731 hci_dev_lock(hdev);
732 seq_printf(m: f, fmt: "%pMR\n", &hdev->static_addr);
733 hci_dev_unlock(hdev);
734
735 return 0;
736}
737
738DEFINE_SHOW_ATTRIBUTE(static_address);
739
740static ssize_t force_static_address_read(struct file *file,
741 char __user *user_buf,
742 size_t count, loff_t *ppos)
743{
744 struct hci_dev *hdev = file->private_data;
745 char buf[3];
746
747 buf[0] = hci_dev_test_flag(hdev, HCI_FORCE_STATIC_ADDR) ? 'Y' : 'N';
748 buf[1] = '\n';
749 buf[2] = '\0';
750 return simple_read_from_buffer(to: user_buf, count, ppos, from: buf, available: 2);
751}
752
753static ssize_t force_static_address_write(struct file *file,
754 const char __user *user_buf,
755 size_t count, loff_t *ppos)
756{
757 struct hci_dev *hdev = file->private_data;
758 bool enable;
759 int err;
760
761 if (hdev_is_powered(hdev))
762 return -EBUSY;
763
764 err = kstrtobool_from_user(s: user_buf, count, res: &enable);
765 if (err)
766 return err;
767
768 if (enable == hci_dev_test_flag(hdev, HCI_FORCE_STATIC_ADDR))
769 return -EALREADY;
770
771 hci_dev_change_flag(hdev, HCI_FORCE_STATIC_ADDR);
772
773 return count;
774}
775
776static const struct file_operations force_static_address_fops = {
777 .open = simple_open,
778 .read = force_static_address_read,
779 .write = force_static_address_write,
780 .llseek = default_llseek,
781};
782
783static int white_list_show(struct seq_file *f, void *ptr)
784{
785 struct hci_dev *hdev = f->private;
786 struct bdaddr_list *b;
787
788 hci_dev_lock(hdev);
789 list_for_each_entry(b, &hdev->le_accept_list, list)
790 seq_printf(m: f, fmt: "%pMR (type %u)\n", &b->bdaddr, b->bdaddr_type);
791 hci_dev_unlock(hdev);
792
793 return 0;
794}
795
796DEFINE_SHOW_ATTRIBUTE(white_list);
797
798static int resolv_list_show(struct seq_file *f, void *ptr)
799{
800 struct hci_dev *hdev = f->private;
801 struct bdaddr_list *b;
802
803 hci_dev_lock(hdev);
804 list_for_each_entry(b, &hdev->le_resolv_list, list)
805 seq_printf(m: f, fmt: "%pMR (type %u)\n", &b->bdaddr, b->bdaddr_type);
806 hci_dev_unlock(hdev);
807
808 return 0;
809}
810
811DEFINE_SHOW_ATTRIBUTE(resolv_list);
812
813static int identity_resolving_keys_show(struct seq_file *f, void *ptr)
814{
815 struct hci_dev *hdev = f->private;
816 struct smp_irk *irk;
817
818 rcu_read_lock();
819 list_for_each_entry_rcu(irk, &hdev->identity_resolving_keys, list) {
820 seq_printf(m: f, fmt: "%pMR (type %u) %*phN %pMR\n",
821 &irk->bdaddr, irk->addr_type,
822 16, irk->val, &irk->rpa);
823 }
824 rcu_read_unlock();
825
826 return 0;
827}
828
829DEFINE_SHOW_ATTRIBUTE(identity_resolving_keys);
830
831static int long_term_keys_show(struct seq_file *f, void *ptr)
832{
833 struct hci_dev *hdev = f->private;
834 struct smp_ltk *ltk;
835
836 rcu_read_lock();
837 list_for_each_entry_rcu(ltk, &hdev->long_term_keys, list)
838 seq_printf(m: f, fmt: "%pMR (type %u) %u 0x%02x %u %.4x %.16llx %*phN\n",
839 &ltk->bdaddr, ltk->bdaddr_type, ltk->authenticated,
840 ltk->type, ltk->enc_size, __le16_to_cpu(ltk->ediv),
841 __le64_to_cpu(ltk->rand), 16, ltk->val);
842 rcu_read_unlock();
843
844 return 0;
845}
846
847DEFINE_SHOW_ATTRIBUTE(long_term_keys);
848
849static int conn_min_interval_set(void *data, u64 val)
850{
851 struct hci_dev *hdev = data;
852
853 if (val < 0x0006 || val > 0x0c80 || val > hdev->le_conn_max_interval)
854 return -EINVAL;
855
856 hci_dev_lock(hdev);
857 hdev->le_conn_min_interval = val;
858 hci_dev_unlock(hdev);
859
860 return 0;
861}
862
863static int conn_min_interval_get(void *data, u64 *val)
864{
865 struct hci_dev *hdev = data;
866
867 hci_dev_lock(hdev);
868 *val = hdev->le_conn_min_interval;
869 hci_dev_unlock(hdev);
870
871 return 0;
872}
873
874DEFINE_DEBUGFS_ATTRIBUTE(conn_min_interval_fops, conn_min_interval_get,
875 conn_min_interval_set, "%llu\n");
876
877static int conn_max_interval_set(void *data, u64 val)
878{
879 struct hci_dev *hdev = data;
880
881 if (val < 0x0006 || val > 0x0c80 || val < hdev->le_conn_min_interval)
882 return -EINVAL;
883
884 hci_dev_lock(hdev);
885 hdev->le_conn_max_interval = val;
886 hci_dev_unlock(hdev);
887
888 return 0;
889}
890
891static int conn_max_interval_get(void *data, u64 *val)
892{
893 struct hci_dev *hdev = data;
894
895 hci_dev_lock(hdev);
896 *val = hdev->le_conn_max_interval;
897 hci_dev_unlock(hdev);
898
899 return 0;
900}
901
902DEFINE_DEBUGFS_ATTRIBUTE(conn_max_interval_fops, conn_max_interval_get,
903 conn_max_interval_set, "%llu\n");
904
905static int conn_latency_set(void *data, u64 val)
906{
907 struct hci_dev *hdev = data;
908
909 if (val > 0x01f3)
910 return -EINVAL;
911
912 hci_dev_lock(hdev);
913 hdev->le_conn_latency = val;
914 hci_dev_unlock(hdev);
915
916 return 0;
917}
918
919static int conn_latency_get(void *data, u64 *val)
920{
921 struct hci_dev *hdev = data;
922
923 hci_dev_lock(hdev);
924 *val = hdev->le_conn_latency;
925 hci_dev_unlock(hdev);
926
927 return 0;
928}
929
930DEFINE_DEBUGFS_ATTRIBUTE(conn_latency_fops, conn_latency_get,
931 conn_latency_set, "%llu\n");
932
933static int supervision_timeout_set(void *data, u64 val)
934{
935 struct hci_dev *hdev = data;
936
937 if (val < 0x000a || val > 0x0c80)
938 return -EINVAL;
939
940 hci_dev_lock(hdev);
941 hdev->le_supv_timeout = val;
942 hci_dev_unlock(hdev);
943
944 return 0;
945}
946
947static int supervision_timeout_get(void *data, u64 *val)
948{
949 struct hci_dev *hdev = data;
950
951 hci_dev_lock(hdev);
952 *val = hdev->le_supv_timeout;
953 hci_dev_unlock(hdev);
954
955 return 0;
956}
957
958DEFINE_DEBUGFS_ATTRIBUTE(supervision_timeout_fops, supervision_timeout_get,
959 supervision_timeout_set, "%llu\n");
960
961static int adv_channel_map_set(void *data, u64 val)
962{
963 struct hci_dev *hdev = data;
964
965 if (val < 0x01 || val > 0x07)
966 return -EINVAL;
967
968 hci_dev_lock(hdev);
969 hdev->le_adv_channel_map = val;
970 hci_dev_unlock(hdev);
971
972 return 0;
973}
974
975static int adv_channel_map_get(void *data, u64 *val)
976{
977 struct hci_dev *hdev = data;
978
979 hci_dev_lock(hdev);
980 *val = hdev->le_adv_channel_map;
981 hci_dev_unlock(hdev);
982
983 return 0;
984}
985
986DEFINE_DEBUGFS_ATTRIBUTE(adv_channel_map_fops, adv_channel_map_get,
987 adv_channel_map_set, "%llu\n");
988
989static int adv_min_interval_set(void *data, u64 val)
990{
991 struct hci_dev *hdev = data;
992
993 if (val < 0x0020 || val > 0x4000 || val > hdev->le_adv_max_interval)
994 return -EINVAL;
995
996 hci_dev_lock(hdev);
997 hdev->le_adv_min_interval = val;
998 hci_dev_unlock(hdev);
999
1000 return 0;
1001}
1002
1003static int adv_min_interval_get(void *data, u64 *val)
1004{
1005 struct hci_dev *hdev = data;
1006
1007 hci_dev_lock(hdev);
1008 *val = hdev->le_adv_min_interval;
1009 hci_dev_unlock(hdev);
1010
1011 return 0;
1012}
1013
1014DEFINE_DEBUGFS_ATTRIBUTE(adv_min_interval_fops, adv_min_interval_get,
1015 adv_min_interval_set, "%llu\n");
1016
1017static int adv_max_interval_set(void *data, u64 val)
1018{
1019 struct hci_dev *hdev = data;
1020
1021 if (val < 0x0020 || val > 0x4000 || val < hdev->le_adv_min_interval)
1022 return -EINVAL;
1023
1024 hci_dev_lock(hdev);
1025 hdev->le_adv_max_interval = val;
1026 hci_dev_unlock(hdev);
1027
1028 return 0;
1029}
1030
1031static int adv_max_interval_get(void *data, u64 *val)
1032{
1033 struct hci_dev *hdev = data;
1034
1035 hci_dev_lock(hdev);
1036 *val = hdev->le_adv_max_interval;
1037 hci_dev_unlock(hdev);
1038
1039 return 0;
1040}
1041
1042DEFINE_DEBUGFS_ATTRIBUTE(adv_max_interval_fops, adv_max_interval_get,
1043 adv_max_interval_set, "%llu\n");
1044
1045static int min_key_size_set(void *data, u64 val)
1046{
1047 struct hci_dev *hdev = data;
1048
1049 if (val > hdev->le_max_key_size || val < SMP_MIN_ENC_KEY_SIZE)
1050 return -EINVAL;
1051
1052 hci_dev_lock(hdev);
1053 hdev->le_min_key_size = val;
1054 hci_dev_unlock(hdev);
1055
1056 return 0;
1057}
1058
1059static int min_key_size_get(void *data, u64 *val)
1060{
1061 struct hci_dev *hdev = data;
1062
1063 hci_dev_lock(hdev);
1064 *val = hdev->le_min_key_size;
1065 hci_dev_unlock(hdev);
1066
1067 return 0;
1068}
1069
1070DEFINE_DEBUGFS_ATTRIBUTE(min_key_size_fops, min_key_size_get,
1071 min_key_size_set, "%llu\n");
1072
1073static int max_key_size_set(void *data, u64 val)
1074{
1075 struct hci_dev *hdev = data;
1076
1077 if (val > SMP_MAX_ENC_KEY_SIZE || val < hdev->le_min_key_size)
1078 return -EINVAL;
1079
1080 hci_dev_lock(hdev);
1081 hdev->le_max_key_size = val;
1082 hci_dev_unlock(hdev);
1083
1084 return 0;
1085}
1086
1087static int max_key_size_get(void *data, u64 *val)
1088{
1089 struct hci_dev *hdev = data;
1090
1091 hci_dev_lock(hdev);
1092 *val = hdev->le_max_key_size;
1093 hci_dev_unlock(hdev);
1094
1095 return 0;
1096}
1097
1098DEFINE_DEBUGFS_ATTRIBUTE(max_key_size_fops, max_key_size_get,
1099 max_key_size_set, "%llu\n");
1100
1101static int auth_payload_timeout_set(void *data, u64 val)
1102{
1103 struct hci_dev *hdev = data;
1104
1105 if (val < 0x0001 || val > 0xffff)
1106 return -EINVAL;
1107
1108 hci_dev_lock(hdev);
1109 hdev->auth_payload_timeout = val;
1110 hci_dev_unlock(hdev);
1111
1112 return 0;
1113}
1114
1115static int auth_payload_timeout_get(void *data, u64 *val)
1116{
1117 struct hci_dev *hdev = data;
1118
1119 hci_dev_lock(hdev);
1120 *val = hdev->auth_payload_timeout;
1121 hci_dev_unlock(hdev);
1122
1123 return 0;
1124}
1125
1126DEFINE_DEBUGFS_ATTRIBUTE(auth_payload_timeout_fops,
1127 auth_payload_timeout_get,
1128 auth_payload_timeout_set, "%llu\n");
1129
1130static ssize_t force_no_mitm_read(struct file *file,
1131 char __user *user_buf,
1132 size_t count, loff_t *ppos)
1133{
1134 struct hci_dev *hdev = file->private_data;
1135 char buf[3];
1136
1137 buf[0] = hci_dev_test_flag(hdev, HCI_FORCE_NO_MITM) ? 'Y' : 'N';
1138 buf[1] = '\n';
1139 buf[2] = '\0';
1140 return simple_read_from_buffer(to: user_buf, count, ppos, from: buf, available: 2);
1141}
1142
1143static ssize_t force_no_mitm_write(struct file *file,
1144 const char __user *user_buf,
1145 size_t count, loff_t *ppos)
1146{
1147 struct hci_dev *hdev = file->private_data;
1148 char buf[32];
1149 size_t buf_size = min(count, (sizeof(buf) - 1));
1150 bool enable;
1151
1152 if (copy_from_user(to: buf, from: user_buf, n: buf_size))
1153 return -EFAULT;
1154
1155 buf[buf_size] = '\0';
1156 if (kstrtobool(s: buf, res: &enable))
1157 return -EINVAL;
1158
1159 if (enable == hci_dev_test_flag(hdev, HCI_FORCE_NO_MITM))
1160 return -EALREADY;
1161
1162 hci_dev_change_flag(hdev, HCI_FORCE_NO_MITM);
1163
1164 return count;
1165}
1166
1167static const struct file_operations force_no_mitm_fops = {
1168 .open = simple_open,
1169 .read = force_no_mitm_read,
1170 .write = force_no_mitm_write,
1171 .llseek = default_llseek,
1172};
1173
1174DEFINE_QUIRK_ATTRIBUTE(quirk_strict_duplicate_filter,
1175 HCI_QUIRK_STRICT_DUPLICATE_FILTER);
1176DEFINE_QUIRK_ATTRIBUTE(quirk_simultaneous_discovery,
1177 HCI_QUIRK_SIMULTANEOUS_DISCOVERY);
1178
1179void hci_debugfs_create_le(struct hci_dev *hdev)
1180{
1181 debugfs_create_file(name: "identity", mode: 0400, parent: hdev->debugfs, data: hdev,
1182 fops: &identity_fops);
1183 debugfs_create_file(name: "rpa_timeout", mode: 0644, parent: hdev->debugfs, data: hdev,
1184 fops: &rpa_timeout_fops);
1185 debugfs_create_file(name: "random_address", mode: 0444, parent: hdev->debugfs, data: hdev,
1186 fops: &random_address_fops);
1187 debugfs_create_file(name: "static_address", mode: 0444, parent: hdev->debugfs, data: hdev,
1188 fops: &static_address_fops);
1189
1190 /* For controllers with a public address, provide a debug
1191 * option to force the usage of the configured static
1192 * address. By default the public address is used.
1193 */
1194 if (bacmp(ba1: &hdev->bdaddr, BDADDR_ANY))
1195 debugfs_create_file(name: "force_static_address", mode: 0644,
1196 parent: hdev->debugfs, data: hdev,
1197 fops: &force_static_address_fops);
1198
1199 debugfs_create_u8(name: "white_list_size", mode: 0444, parent: hdev->debugfs,
1200 value: &hdev->le_accept_list_size);
1201 debugfs_create_file(name: "white_list", mode: 0444, parent: hdev->debugfs, data: hdev,
1202 fops: &white_list_fops);
1203 debugfs_create_u8(name: "resolv_list_size", mode: 0444, parent: hdev->debugfs,
1204 value: &hdev->le_resolv_list_size);
1205 debugfs_create_file(name: "resolv_list", mode: 0444, parent: hdev->debugfs, data: hdev,
1206 fops: &resolv_list_fops);
1207 debugfs_create_file(name: "identity_resolving_keys", mode: 0400, parent: hdev->debugfs,
1208 data: hdev, fops: &identity_resolving_keys_fops);
1209 debugfs_create_file(name: "long_term_keys", mode: 0400, parent: hdev->debugfs, data: hdev,
1210 fops: &long_term_keys_fops);
1211 debugfs_create_file(name: "conn_min_interval", mode: 0644, parent: hdev->debugfs, data: hdev,
1212 fops: &conn_min_interval_fops);
1213 debugfs_create_file(name: "conn_max_interval", mode: 0644, parent: hdev->debugfs, data: hdev,
1214 fops: &conn_max_interval_fops);
1215 debugfs_create_file(name: "conn_latency", mode: 0644, parent: hdev->debugfs, data: hdev,
1216 fops: &conn_latency_fops);
1217 debugfs_create_file(name: "supervision_timeout", mode: 0644, parent: hdev->debugfs, data: hdev,
1218 fops: &supervision_timeout_fops);
1219 debugfs_create_file(name: "adv_channel_map", mode: 0644, parent: hdev->debugfs, data: hdev,
1220 fops: &adv_channel_map_fops);
1221 debugfs_create_file(name: "adv_min_interval", mode: 0644, parent: hdev->debugfs, data: hdev,
1222 fops: &adv_min_interval_fops);
1223 debugfs_create_file(name: "adv_max_interval", mode: 0644, parent: hdev->debugfs, data: hdev,
1224 fops: &adv_max_interval_fops);
1225 debugfs_create_u16(name: "discov_interleaved_timeout", mode: 0644, parent: hdev->debugfs,
1226 value: &hdev->discov_interleaved_timeout);
1227 debugfs_create_file(name: "min_key_size", mode: 0644, parent: hdev->debugfs, data: hdev,
1228 fops: &min_key_size_fops);
1229 debugfs_create_file(name: "max_key_size", mode: 0644, parent: hdev->debugfs, data: hdev,
1230 fops: &max_key_size_fops);
1231 debugfs_create_file(name: "auth_payload_timeout", mode: 0644, parent: hdev->debugfs, data: hdev,
1232 fops: &auth_payload_timeout_fops);
1233 debugfs_create_file(name: "force_no_mitm", mode: 0644, parent: hdev->debugfs, data: hdev,
1234 fops: &force_no_mitm_fops);
1235
1236 debugfs_create_file(name: "quirk_strict_duplicate_filter", mode: 0644,
1237 parent: hdev->debugfs, data: hdev,
1238 fops: &quirk_strict_duplicate_filter_fops);
1239 debugfs_create_file(name: "quirk_simultaneous_discovery", mode: 0644,
1240 parent: hdev->debugfs, data: hdev,
1241 fops: &quirk_simultaneous_discovery_fops);
1242}
1243
1244void hci_debugfs_create_conn(struct hci_conn *conn)
1245{
1246 struct hci_dev *hdev = conn->hdev;
1247 char name[6];
1248
1249 if (IS_ERR_OR_NULL(ptr: hdev->debugfs) || conn->debugfs)
1250 return;
1251
1252 snprintf(buf: name, size: sizeof(name), fmt: "%u", conn->handle);
1253 conn->debugfs = debugfs_create_dir(name, parent: hdev->debugfs);
1254}
1255
1256static ssize_t dut_mode_read(struct file *file, char __user *user_buf,
1257 size_t count, loff_t *ppos)
1258{
1259 struct hci_dev *hdev = file->private_data;
1260 char buf[3];
1261
1262 buf[0] = hci_dev_test_flag(hdev, HCI_DUT_MODE) ? 'Y' : 'N';
1263 buf[1] = '\n';
1264 buf[2] = '\0';
1265 return simple_read_from_buffer(to: user_buf, count, ppos, from: buf, available: 2);
1266}
1267
1268static ssize_t dut_mode_write(struct file *file, const char __user *user_buf,
1269 size_t count, loff_t *ppos)
1270{
1271 struct hci_dev *hdev = file->private_data;
1272 struct sk_buff *skb;
1273 bool enable;
1274 int err;
1275
1276 if (!test_bit(HCI_UP, &hdev->flags))
1277 return -ENETDOWN;
1278
1279 err = kstrtobool_from_user(s: user_buf, count, res: &enable);
1280 if (err)
1281 return err;
1282
1283 if (enable == hci_dev_test_flag(hdev, HCI_DUT_MODE))
1284 return -EALREADY;
1285
1286 hci_req_sync_lock(hdev);
1287 if (enable)
1288 skb = __hci_cmd_sync(hdev, HCI_OP_ENABLE_DUT_MODE, plen: 0, NULL,
1289 HCI_CMD_TIMEOUT);
1290 else
1291 skb = __hci_cmd_sync(hdev, HCI_OP_RESET, plen: 0, NULL,
1292 HCI_CMD_TIMEOUT);
1293 hci_req_sync_unlock(hdev);
1294
1295 if (IS_ERR(ptr: skb))
1296 return PTR_ERR(ptr: skb);
1297
1298 kfree_skb(skb);
1299
1300 hci_dev_change_flag(hdev, HCI_DUT_MODE);
1301
1302 return count;
1303}
1304
1305static const struct file_operations dut_mode_fops = {
1306 .open = simple_open,
1307 .read = dut_mode_read,
1308 .write = dut_mode_write,
1309 .llseek = default_llseek,
1310};
1311
1312static ssize_t vendor_diag_read(struct file *file, char __user *user_buf,
1313 size_t count, loff_t *ppos)
1314{
1315 struct hci_dev *hdev = file->private_data;
1316 char buf[3];
1317
1318 buf[0] = hci_dev_test_flag(hdev, HCI_VENDOR_DIAG) ? 'Y' : 'N';
1319 buf[1] = '\n';
1320 buf[2] = '\0';
1321 return simple_read_from_buffer(to: user_buf, count, ppos, from: buf, available: 2);
1322}
1323
1324static ssize_t vendor_diag_write(struct file *file, const char __user *user_buf,
1325 size_t count, loff_t *ppos)
1326{
1327 struct hci_dev *hdev = file->private_data;
1328 bool enable;
1329 int err;
1330
1331 err = kstrtobool_from_user(s: user_buf, count, res: &enable);
1332 if (err)
1333 return err;
1334
1335 /* When the diagnostic flags are not persistent and the transport
1336 * is not active or in user channel operation, then there is no need
1337 * for the vendor callback. Instead just store the desired value and
1338 * the setting will be programmed when the controller gets powered on.
1339 */
1340 if (test_bit(HCI_QUIRK_NON_PERSISTENT_DIAG, &hdev->quirks) &&
1341 (!test_bit(HCI_RUNNING, &hdev->flags) ||
1342 hci_dev_test_flag(hdev, HCI_USER_CHANNEL)))
1343 goto done;
1344
1345 hci_req_sync_lock(hdev);
1346 err = hdev->set_diag(hdev, enable);
1347 hci_req_sync_unlock(hdev);
1348
1349 if (err < 0)
1350 return err;
1351
1352done:
1353 if (enable)
1354 hci_dev_set_flag(hdev, HCI_VENDOR_DIAG);
1355 else
1356 hci_dev_clear_flag(hdev, HCI_VENDOR_DIAG);
1357
1358 return count;
1359}
1360
1361static const struct file_operations vendor_diag_fops = {
1362 .open = simple_open,
1363 .read = vendor_diag_read,
1364 .write = vendor_diag_write,
1365 .llseek = default_llseek,
1366};
1367
1368void hci_debugfs_create_basic(struct hci_dev *hdev)
1369{
1370 debugfs_create_file(name: "dut_mode", mode: 0644, parent: hdev->debugfs, data: hdev,
1371 fops: &dut_mode_fops);
1372
1373 if (hdev->set_diag)
1374 debugfs_create_file(name: "vendor_diag", mode: 0644, parent: hdev->debugfs, data: hdev,
1375 fops: &vendor_diag_fops);
1376}
1377

source code of linux/net/bluetooth/hci_debugfs.c