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 hci_dev_lock(hdev);
222 if (val == 0 || val > hdev->conn_info_max_age) {
223 hci_dev_unlock(hdev);
224 return -EINVAL;
225 }
226
227 hdev->conn_info_min_age = val;
228 hci_dev_unlock(hdev);
229
230 return 0;
231}
232
233static int conn_info_min_age_get(void *data, u64 *val)
234{
235 struct hci_dev *hdev = data;
236
237 hci_dev_lock(hdev);
238 *val = hdev->conn_info_min_age;
239 hci_dev_unlock(hdev);
240
241 return 0;
242}
243
244DEFINE_DEBUGFS_ATTRIBUTE(conn_info_min_age_fops, conn_info_min_age_get,
245 conn_info_min_age_set, "%llu\n");
246
247static int conn_info_max_age_set(void *data, u64 val)
248{
249 struct hci_dev *hdev = data;
250
251 hci_dev_lock(hdev);
252 if (val == 0 || val < hdev->conn_info_min_age) {
253 hci_dev_unlock(hdev);
254 return -EINVAL;
255 }
256
257 hdev->conn_info_max_age = val;
258 hci_dev_unlock(hdev);
259
260 return 0;
261}
262
263static int conn_info_max_age_get(void *data, u64 *val)
264{
265 struct hci_dev *hdev = data;
266
267 hci_dev_lock(hdev);
268 *val = hdev->conn_info_max_age;
269 hci_dev_unlock(hdev);
270
271 return 0;
272}
273
274DEFINE_DEBUGFS_ATTRIBUTE(conn_info_max_age_fops, conn_info_max_age_get,
275 conn_info_max_age_set, "%llu\n");
276
277static ssize_t use_debug_keys_read(struct file *file, char __user *user_buf,
278 size_t count, loff_t *ppos)
279{
280 struct hci_dev *hdev = file->private_data;
281 char buf[3];
282
283 buf[0] = hci_dev_test_flag(hdev, HCI_USE_DEBUG_KEYS) ? 'Y' : 'N';
284 buf[1] = '\n';
285 buf[2] = '\0';
286 return simple_read_from_buffer(to: user_buf, count, ppos, from: buf, available: 2);
287}
288
289static const struct file_operations use_debug_keys_fops = {
290 .open = simple_open,
291 .read = use_debug_keys_read,
292 .llseek = default_llseek,
293};
294
295static ssize_t sc_only_mode_read(struct file *file, char __user *user_buf,
296 size_t count, loff_t *ppos)
297{
298 struct hci_dev *hdev = file->private_data;
299 char buf[3];
300
301 buf[0] = hci_dev_test_flag(hdev, HCI_SC_ONLY) ? 'Y' : 'N';
302 buf[1] = '\n';
303 buf[2] = '\0';
304 return simple_read_from_buffer(to: user_buf, count, ppos, from: buf, available: 2);
305}
306
307static const struct file_operations sc_only_mode_fops = {
308 .open = simple_open,
309 .read = sc_only_mode_read,
310 .llseek = default_llseek,
311};
312
313DEFINE_INFO_ATTRIBUTE(hardware_info, hw_info);
314DEFINE_INFO_ATTRIBUTE(firmware_info, fw_info);
315
316void hci_debugfs_create_common(struct hci_dev *hdev)
317{
318 debugfs_create_file(name: "features", mode: 0444, parent: hdev->debugfs, data: hdev,
319 fops: &features_fops);
320 debugfs_create_u16(name: "manufacturer", mode: 0444, parent: hdev->debugfs,
321 value: &hdev->manufacturer);
322 debugfs_create_u8(name: "hci_version", mode: 0444, parent: hdev->debugfs, value: &hdev->hci_ver);
323 debugfs_create_u16(name: "hci_revision", mode: 0444, parent: hdev->debugfs, value: &hdev->hci_rev);
324 debugfs_create_u8(name: "hardware_error", mode: 0444, parent: hdev->debugfs,
325 value: &hdev->hw_error_code);
326 debugfs_create_file(name: "device_id", mode: 0444, parent: hdev->debugfs, data: hdev,
327 fops: &device_id_fops);
328
329 debugfs_create_file(name: "device_list", mode: 0444, parent: hdev->debugfs, data: hdev,
330 fops: &device_list_fops);
331 debugfs_create_file(name: "blacklist", mode: 0444, parent: hdev->debugfs, data: hdev,
332 fops: &blacklist_fops);
333 debugfs_create_file(name: "blocked_keys", mode: 0444, parent: hdev->debugfs, data: hdev,
334 fops: &blocked_keys_fops);
335 debugfs_create_file(name: "uuids", mode: 0444, parent: hdev->debugfs, data: hdev, fops: &uuids_fops);
336 debugfs_create_file(name: "remote_oob", mode: 0400, parent: hdev->debugfs, data: hdev,
337 fops: &remote_oob_fops);
338
339 debugfs_create_file(name: "conn_info_min_age", mode: 0644, parent: hdev->debugfs, data: hdev,
340 fops: &conn_info_min_age_fops);
341 debugfs_create_file(name: "conn_info_max_age", mode: 0644, parent: hdev->debugfs, data: hdev,
342 fops: &conn_info_max_age_fops);
343
344 if (lmp_ssp_capable(hdev) || lmp_le_capable(hdev))
345 debugfs_create_file(name: "use_debug_keys", mode: 0444, parent: hdev->debugfs,
346 data: hdev, fops: &use_debug_keys_fops);
347
348 if (lmp_sc_capable(hdev) || lmp_le_capable(hdev))
349 debugfs_create_file(name: "sc_only_mode", mode: 0444, parent: hdev->debugfs,
350 data: hdev, fops: &sc_only_mode_fops);
351
352 if (hdev->hw_info)
353 debugfs_create_file(name: "hardware_info", mode: 0444, parent: hdev->debugfs,
354 data: hdev, fops: &hardware_info_fops);
355
356 if (hdev->fw_info)
357 debugfs_create_file(name: "firmware_info", mode: 0444, parent: hdev->debugfs,
358 data: hdev, fops: &firmware_info_fops);
359}
360
361static int inquiry_cache_show(struct seq_file *f, void *p)
362{
363 struct hci_dev *hdev = f->private;
364 struct discovery_state *cache = &hdev->discovery;
365 struct inquiry_entry *e;
366
367 hci_dev_lock(hdev);
368
369 list_for_each_entry(e, &cache->all, all) {
370 struct inquiry_data *data = &e->data;
371 seq_printf(m: f, fmt: "%pMR %d %d %d 0x%.2x%.2x%.2x 0x%.4x %d %d %u\n",
372 &data->bdaddr,
373 data->pscan_rep_mode, data->pscan_period_mode,
374 data->pscan_mode, data->dev_class[2],
375 data->dev_class[1], data->dev_class[0],
376 __le16_to_cpu(data->clock_offset),
377 data->rssi, data->ssp_mode, e->timestamp);
378 }
379
380 hci_dev_unlock(hdev);
381
382 return 0;
383}
384
385DEFINE_SHOW_ATTRIBUTE(inquiry_cache);
386
387static int link_keys_show(struct seq_file *f, void *ptr)
388{
389 struct hci_dev *hdev = f->private;
390 struct link_key *key;
391
392 rcu_read_lock();
393 list_for_each_entry_rcu(key, &hdev->link_keys, list)
394 seq_printf(m: f, fmt: "%pMR %u %*phN %u\n", &key->bdaddr, key->type,
395 HCI_LINK_KEY_SIZE, key->val, key->pin_len);
396 rcu_read_unlock();
397
398 return 0;
399}
400
401DEFINE_SHOW_ATTRIBUTE(link_keys);
402
403static int dev_class_show(struct seq_file *f, void *ptr)
404{
405 struct hci_dev *hdev = f->private;
406
407 hci_dev_lock(hdev);
408 seq_printf(m: f, fmt: "0x%.2x%.2x%.2x\n", hdev->dev_class[2],
409 hdev->dev_class[1], hdev->dev_class[0]);
410 hci_dev_unlock(hdev);
411
412 return 0;
413}
414
415DEFINE_SHOW_ATTRIBUTE(dev_class);
416
417static int voice_setting_get(void *data, u64 *val)
418{
419 struct hci_dev *hdev = data;
420
421 hci_dev_lock(hdev);
422 *val = hdev->voice_setting;
423 hci_dev_unlock(hdev);
424
425 return 0;
426}
427
428DEFINE_DEBUGFS_ATTRIBUTE(voice_setting_fops, voice_setting_get,
429 NULL, "0x%4.4llx\n");
430
431static ssize_t ssp_debug_mode_read(struct file *file, char __user *user_buf,
432 size_t count, loff_t *ppos)
433{
434 struct hci_dev *hdev = file->private_data;
435 char buf[3];
436
437 buf[0] = hdev->ssp_debug_mode ? 'Y' : 'N';
438 buf[1] = '\n';
439 buf[2] = '\0';
440 return simple_read_from_buffer(to: user_buf, count, ppos, from: buf, available: 2);
441}
442
443static const struct file_operations ssp_debug_mode_fops = {
444 .open = simple_open,
445 .read = ssp_debug_mode_read,
446 .llseek = default_llseek,
447};
448
449static int auto_accept_delay_set(void *data, u64 val)
450{
451 struct hci_dev *hdev = data;
452
453 hci_dev_lock(hdev);
454 hdev->auto_accept_delay = val;
455 hci_dev_unlock(hdev);
456
457 return 0;
458}
459
460static int min_encrypt_key_size_set(void *data, u64 val)
461{
462 struct hci_dev *hdev = data;
463
464 if (val < 1 || val > 16)
465 return -EINVAL;
466
467 hci_dev_lock(hdev);
468 hdev->min_enc_key_size = val;
469 hci_dev_unlock(hdev);
470
471 return 0;
472}
473
474static int min_encrypt_key_size_get(void *data, u64 *val)
475{
476 struct hci_dev *hdev = data;
477
478 hci_dev_lock(hdev);
479 *val = hdev->min_enc_key_size;
480 hci_dev_unlock(hdev);
481
482 return 0;
483}
484
485DEFINE_DEBUGFS_ATTRIBUTE(min_encrypt_key_size_fops,
486 min_encrypt_key_size_get,
487 min_encrypt_key_size_set, "%llu\n");
488
489static int auto_accept_delay_get(void *data, u64 *val)
490{
491 struct hci_dev *hdev = data;
492
493 hci_dev_lock(hdev);
494 *val = hdev->auto_accept_delay;
495 hci_dev_unlock(hdev);
496
497 return 0;
498}
499
500DEFINE_DEBUGFS_ATTRIBUTE(auto_accept_delay_fops, auto_accept_delay_get,
501 auto_accept_delay_set, "%llu\n");
502
503static ssize_t force_bredr_smp_read(struct file *file,
504 char __user *user_buf,
505 size_t count, loff_t *ppos)
506{
507 struct hci_dev *hdev = file->private_data;
508 char buf[3];
509
510 buf[0] = hci_dev_test_flag(hdev, HCI_FORCE_BREDR_SMP) ? 'Y' : 'N';
511 buf[1] = '\n';
512 buf[2] = '\0';
513 return simple_read_from_buffer(to: user_buf, count, ppos, from: buf, available: 2);
514}
515
516static ssize_t force_bredr_smp_write(struct file *file,
517 const char __user *user_buf,
518 size_t count, loff_t *ppos)
519{
520 struct hci_dev *hdev = file->private_data;
521 bool enable;
522 int err;
523
524 err = kstrtobool_from_user(s: user_buf, count, res: &enable);
525 if (err)
526 return err;
527
528 err = smp_force_bredr(hdev, enable);
529 if (err)
530 return err;
531
532 return count;
533}
534
535static const struct file_operations force_bredr_smp_fops = {
536 .open = simple_open,
537 .read = force_bredr_smp_read,
538 .write = force_bredr_smp_write,
539 .llseek = default_llseek,
540};
541
542static int idle_timeout_set(void *data, u64 val)
543{
544 struct hci_dev *hdev = data;
545
546 if (val != 0 && (val < 500 || val > 3600000))
547 return -EINVAL;
548
549 hci_dev_lock(hdev);
550 hdev->idle_timeout = val;
551 hci_dev_unlock(hdev);
552
553 return 0;
554}
555
556static int idle_timeout_get(void *data, u64 *val)
557{
558 struct hci_dev *hdev = data;
559
560 hci_dev_lock(hdev);
561 *val = hdev->idle_timeout;
562 hci_dev_unlock(hdev);
563
564 return 0;
565}
566
567DEFINE_DEBUGFS_ATTRIBUTE(idle_timeout_fops, idle_timeout_get,
568 idle_timeout_set, "%llu\n");
569
570static int sniff_min_interval_set(void *data, u64 val)
571{
572 struct hci_dev *hdev = data;
573
574 hci_dev_lock(hdev);
575 if (val == 0 || val % 2 || val > hdev->sniff_max_interval) {
576 hci_dev_unlock(hdev);
577 return -EINVAL;
578 }
579
580 hdev->sniff_min_interval = val;
581 hci_dev_unlock(hdev);
582
583 return 0;
584}
585
586static int sniff_min_interval_get(void *data, u64 *val)
587{
588 struct hci_dev *hdev = data;
589
590 hci_dev_lock(hdev);
591 *val = hdev->sniff_min_interval;
592 hci_dev_unlock(hdev);
593
594 return 0;
595}
596
597DEFINE_DEBUGFS_ATTRIBUTE(sniff_min_interval_fops, sniff_min_interval_get,
598 sniff_min_interval_set, "%llu\n");
599
600static int sniff_max_interval_set(void *data, u64 val)
601{
602 struct hci_dev *hdev = data;
603
604 hci_dev_lock(hdev);
605 if (val == 0 || val % 2 || val < hdev->sniff_min_interval) {
606 hci_dev_unlock(hdev);
607 return -EINVAL;
608 }
609
610 hdev->sniff_max_interval = val;
611 hci_dev_unlock(hdev);
612
613 return 0;
614}
615
616static int sniff_max_interval_get(void *data, u64 *val)
617{
618 struct hci_dev *hdev = data;
619
620 hci_dev_lock(hdev);
621 *val = hdev->sniff_max_interval;
622 hci_dev_unlock(hdev);
623
624 return 0;
625}
626
627DEFINE_DEBUGFS_ATTRIBUTE(sniff_max_interval_fops, sniff_max_interval_get,
628 sniff_max_interval_set, "%llu\n");
629
630void hci_debugfs_create_bredr(struct hci_dev *hdev)
631{
632 debugfs_create_file(name: "inquiry_cache", mode: 0444, parent: hdev->debugfs, data: hdev,
633 fops: &inquiry_cache_fops);
634 debugfs_create_file(name: "link_keys", mode: 0400, parent: hdev->debugfs, data: hdev,
635 fops: &link_keys_fops);
636 debugfs_create_file(name: "dev_class", mode: 0444, parent: hdev->debugfs, data: hdev,
637 fops: &dev_class_fops);
638 debugfs_create_file(name: "voice_setting", mode: 0444, parent: hdev->debugfs, data: hdev,
639 fops: &voice_setting_fops);
640
641 /* If the controller does not support BR/EDR Secure Connections
642 * feature, then the BR/EDR SMP channel shall not be present.
643 *
644 * To test this with Bluetooth 4.0 controllers, create a debugfs
645 * switch that allows forcing BR/EDR SMP support and accepting
646 * cross-transport pairing on non-AES encrypted connections.
647 */
648 if (!lmp_sc_capable(hdev))
649 debugfs_create_file(name: "force_bredr_smp", mode: 0644, parent: hdev->debugfs,
650 data: hdev, fops: &force_bredr_smp_fops);
651
652 if (lmp_ssp_capable(hdev)) {
653 debugfs_create_file(name: "ssp_debug_mode", mode: 0444, parent: hdev->debugfs,
654 data: hdev, fops: &ssp_debug_mode_fops);
655 debugfs_create_file(name: "min_encrypt_key_size", mode: 0644, parent: hdev->debugfs,
656 data: hdev, fops: &min_encrypt_key_size_fops);
657 debugfs_create_file(name: "auto_accept_delay", mode: 0644, parent: hdev->debugfs,
658 data: hdev, fops: &auto_accept_delay_fops);
659 }
660
661 if (lmp_sniff_capable(hdev)) {
662 debugfs_create_file(name: "idle_timeout", mode: 0644, parent: hdev->debugfs,
663 data: hdev, fops: &idle_timeout_fops);
664 debugfs_create_file(name: "sniff_min_interval", mode: 0644, parent: hdev->debugfs,
665 data: hdev, fops: &sniff_min_interval_fops);
666 debugfs_create_file(name: "sniff_max_interval", mode: 0644, parent: hdev->debugfs,
667 data: hdev, fops: &sniff_max_interval_fops);
668 }
669}
670
671static int identity_show(struct seq_file *f, void *p)
672{
673 struct hci_dev *hdev = f->private;
674 bdaddr_t addr;
675 u8 addr_type;
676
677 hci_dev_lock(hdev);
678
679 hci_copy_identity_address(hdev, bdaddr: &addr, bdaddr_type: &addr_type);
680
681 seq_printf(m: f, fmt: "%pMR (type %u) %*phN %pMR\n", &addr, addr_type,
682 16, hdev->irk, &hdev->rpa);
683
684 hci_dev_unlock(hdev);
685
686 return 0;
687}
688
689DEFINE_SHOW_ATTRIBUTE(identity);
690
691static int rpa_timeout_set(void *data, u64 val)
692{
693 struct hci_dev *hdev = data;
694
695 /* Require the RPA timeout to be at least 30 seconds and at most
696 * 24 hours.
697 */
698 if (val < 30 || val > (60 * 60 * 24))
699 return -EINVAL;
700
701 hci_dev_lock(hdev);
702 hdev->rpa_timeout = val;
703 hci_dev_unlock(hdev);
704
705 return 0;
706}
707
708static int rpa_timeout_get(void *data, u64 *val)
709{
710 struct hci_dev *hdev = data;
711
712 hci_dev_lock(hdev);
713 *val = hdev->rpa_timeout;
714 hci_dev_unlock(hdev);
715
716 return 0;
717}
718
719DEFINE_DEBUGFS_ATTRIBUTE(rpa_timeout_fops, rpa_timeout_get,
720 rpa_timeout_set, "%llu\n");
721
722static int random_address_show(struct seq_file *f, void *p)
723{
724 struct hci_dev *hdev = f->private;
725
726 hci_dev_lock(hdev);
727 seq_printf(m: f, fmt: "%pMR\n", &hdev->random_addr);
728 hci_dev_unlock(hdev);
729
730 return 0;
731}
732
733DEFINE_SHOW_ATTRIBUTE(random_address);
734
735static int static_address_show(struct seq_file *f, void *p)
736{
737 struct hci_dev *hdev = f->private;
738
739 hci_dev_lock(hdev);
740 seq_printf(m: f, fmt: "%pMR\n", &hdev->static_addr);
741 hci_dev_unlock(hdev);
742
743 return 0;
744}
745
746DEFINE_SHOW_ATTRIBUTE(static_address);
747
748static ssize_t force_static_address_read(struct file *file,
749 char __user *user_buf,
750 size_t count, loff_t *ppos)
751{
752 struct hci_dev *hdev = file->private_data;
753 char buf[3];
754
755 buf[0] = hci_dev_test_flag(hdev, HCI_FORCE_STATIC_ADDR) ? 'Y' : 'N';
756 buf[1] = '\n';
757 buf[2] = '\0';
758 return simple_read_from_buffer(to: user_buf, count, ppos, from: buf, available: 2);
759}
760
761static ssize_t force_static_address_write(struct file *file,
762 const char __user *user_buf,
763 size_t count, loff_t *ppos)
764{
765 struct hci_dev *hdev = file->private_data;
766 bool enable;
767 int err;
768
769 if (hdev_is_powered(hdev))
770 return -EBUSY;
771
772 err = kstrtobool_from_user(s: user_buf, count, res: &enable);
773 if (err)
774 return err;
775
776 if (enable == hci_dev_test_flag(hdev, HCI_FORCE_STATIC_ADDR))
777 return -EALREADY;
778
779 hci_dev_change_flag(hdev, HCI_FORCE_STATIC_ADDR);
780
781 return count;
782}
783
784static const struct file_operations force_static_address_fops = {
785 .open = simple_open,
786 .read = force_static_address_read,
787 .write = force_static_address_write,
788 .llseek = default_llseek,
789};
790
791static int white_list_show(struct seq_file *f, void *ptr)
792{
793 struct hci_dev *hdev = f->private;
794 struct bdaddr_list *b;
795
796 hci_dev_lock(hdev);
797 list_for_each_entry(b, &hdev->le_accept_list, list)
798 seq_printf(m: f, fmt: "%pMR (type %u)\n", &b->bdaddr, b->bdaddr_type);
799 hci_dev_unlock(hdev);
800
801 return 0;
802}
803
804DEFINE_SHOW_ATTRIBUTE(white_list);
805
806static int resolv_list_show(struct seq_file *f, void *ptr)
807{
808 struct hci_dev *hdev = f->private;
809 struct bdaddr_list *b;
810
811 hci_dev_lock(hdev);
812 list_for_each_entry(b, &hdev->le_resolv_list, list)
813 seq_printf(m: f, fmt: "%pMR (type %u)\n", &b->bdaddr, b->bdaddr_type);
814 hci_dev_unlock(hdev);
815
816 return 0;
817}
818
819DEFINE_SHOW_ATTRIBUTE(resolv_list);
820
821static int identity_resolving_keys_show(struct seq_file *f, void *ptr)
822{
823 struct hci_dev *hdev = f->private;
824 struct smp_irk *irk;
825
826 rcu_read_lock();
827 list_for_each_entry_rcu(irk, &hdev->identity_resolving_keys, list) {
828 seq_printf(m: f, fmt: "%pMR (type %u) %*phN %pMR\n",
829 &irk->bdaddr, irk->addr_type,
830 16, irk->val, &irk->rpa);
831 }
832 rcu_read_unlock();
833
834 return 0;
835}
836
837DEFINE_SHOW_ATTRIBUTE(identity_resolving_keys);
838
839static int long_term_keys_show(struct seq_file *f, void *ptr)
840{
841 struct hci_dev *hdev = f->private;
842 struct smp_ltk *ltk;
843
844 rcu_read_lock();
845 list_for_each_entry_rcu(ltk, &hdev->long_term_keys, list)
846 seq_printf(m: f, fmt: "%pMR (type %u) %u 0x%02x %u %.4x %.16llx %*phN\n",
847 &ltk->bdaddr, ltk->bdaddr_type, ltk->authenticated,
848 ltk->type, ltk->enc_size, __le16_to_cpu(ltk->ediv),
849 __le64_to_cpu(ltk->rand), 16, ltk->val);
850 rcu_read_unlock();
851
852 return 0;
853}
854
855DEFINE_SHOW_ATTRIBUTE(long_term_keys);
856
857static int conn_min_interval_set(void *data, u64 val)
858{
859 struct hci_dev *hdev = data;
860
861 hci_dev_lock(hdev);
862 if (val < 0x0006 || val > 0x0c80 || val > hdev->le_conn_max_interval) {
863 hci_dev_unlock(hdev);
864 return -EINVAL;
865 }
866
867 hdev->le_conn_min_interval = val;
868 hci_dev_unlock(hdev);
869
870 return 0;
871}
872
873static int conn_min_interval_get(void *data, u64 *val)
874{
875 struct hci_dev *hdev = data;
876
877 hci_dev_lock(hdev);
878 *val = hdev->le_conn_min_interval;
879 hci_dev_unlock(hdev);
880
881 return 0;
882}
883
884DEFINE_DEBUGFS_ATTRIBUTE(conn_min_interval_fops, conn_min_interval_get,
885 conn_min_interval_set, "%llu\n");
886
887static int conn_max_interval_set(void *data, u64 val)
888{
889 struct hci_dev *hdev = data;
890
891 hci_dev_lock(hdev);
892 if (val < 0x0006 || val > 0x0c80 || val < hdev->le_conn_min_interval) {
893 hci_dev_unlock(hdev);
894 return -EINVAL;
895 }
896
897 hdev->le_conn_max_interval = val;
898 hci_dev_unlock(hdev);
899
900 return 0;
901}
902
903static int conn_max_interval_get(void *data, u64 *val)
904{
905 struct hci_dev *hdev = data;
906
907 hci_dev_lock(hdev);
908 *val = hdev->le_conn_max_interval;
909 hci_dev_unlock(hdev);
910
911 return 0;
912}
913
914DEFINE_DEBUGFS_ATTRIBUTE(conn_max_interval_fops, conn_max_interval_get,
915 conn_max_interval_set, "%llu\n");
916
917static int conn_latency_set(void *data, u64 val)
918{
919 struct hci_dev *hdev = data;
920
921 if (val > 0x01f3)
922 return -EINVAL;
923
924 hci_dev_lock(hdev);
925 hdev->le_conn_latency = val;
926 hci_dev_unlock(hdev);
927
928 return 0;
929}
930
931static int conn_latency_get(void *data, u64 *val)
932{
933 struct hci_dev *hdev = data;
934
935 hci_dev_lock(hdev);
936 *val = hdev->le_conn_latency;
937 hci_dev_unlock(hdev);
938
939 return 0;
940}
941
942DEFINE_DEBUGFS_ATTRIBUTE(conn_latency_fops, conn_latency_get,
943 conn_latency_set, "%llu\n");
944
945static int supervision_timeout_set(void *data, u64 val)
946{
947 struct hci_dev *hdev = data;
948
949 if (val < 0x000a || val > 0x0c80)
950 return -EINVAL;
951
952 hci_dev_lock(hdev);
953 hdev->le_supv_timeout = val;
954 hci_dev_unlock(hdev);
955
956 return 0;
957}
958
959static int supervision_timeout_get(void *data, u64 *val)
960{
961 struct hci_dev *hdev = data;
962
963 hci_dev_lock(hdev);
964 *val = hdev->le_supv_timeout;
965 hci_dev_unlock(hdev);
966
967 return 0;
968}
969
970DEFINE_DEBUGFS_ATTRIBUTE(supervision_timeout_fops, supervision_timeout_get,
971 supervision_timeout_set, "%llu\n");
972
973static int adv_channel_map_set(void *data, u64 val)
974{
975 struct hci_dev *hdev = data;
976
977 if (val < 0x01 || val > 0x07)
978 return -EINVAL;
979
980 hci_dev_lock(hdev);
981 hdev->le_adv_channel_map = val;
982 hci_dev_unlock(hdev);
983
984 return 0;
985}
986
987static int adv_channel_map_get(void *data, u64 *val)
988{
989 struct hci_dev *hdev = data;
990
991 hci_dev_lock(hdev);
992 *val = hdev->le_adv_channel_map;
993 hci_dev_unlock(hdev);
994
995 return 0;
996}
997
998DEFINE_DEBUGFS_ATTRIBUTE(adv_channel_map_fops, adv_channel_map_get,
999 adv_channel_map_set, "%llu\n");
1000
1001static int adv_min_interval_set(void *data, u64 val)
1002{
1003 struct hci_dev *hdev = data;
1004
1005 hci_dev_lock(hdev);
1006 if (val < 0x0020 || val > 0x4000 || val > hdev->le_adv_max_interval) {
1007 hci_dev_unlock(hdev);
1008 return -EINVAL;
1009 }
1010
1011 hdev->le_adv_min_interval = val;
1012 hci_dev_unlock(hdev);
1013
1014 return 0;
1015}
1016
1017static int adv_min_interval_get(void *data, u64 *val)
1018{
1019 struct hci_dev *hdev = data;
1020
1021 hci_dev_lock(hdev);
1022 *val = hdev->le_adv_min_interval;
1023 hci_dev_unlock(hdev);
1024
1025 return 0;
1026}
1027
1028DEFINE_DEBUGFS_ATTRIBUTE(adv_min_interval_fops, adv_min_interval_get,
1029 adv_min_interval_set, "%llu\n");
1030
1031static int adv_max_interval_set(void *data, u64 val)
1032{
1033 struct hci_dev *hdev = data;
1034
1035 hci_dev_lock(hdev);
1036 if (val < 0x0020 || val > 0x4000 || val < hdev->le_adv_min_interval) {
1037 hci_dev_unlock(hdev);
1038 return -EINVAL;
1039 }
1040
1041 hdev->le_adv_max_interval = val;
1042 hci_dev_unlock(hdev);
1043
1044 return 0;
1045}
1046
1047static int adv_max_interval_get(void *data, u64 *val)
1048{
1049 struct hci_dev *hdev = data;
1050
1051 hci_dev_lock(hdev);
1052 *val = hdev->le_adv_max_interval;
1053 hci_dev_unlock(hdev);
1054
1055 return 0;
1056}
1057
1058DEFINE_DEBUGFS_ATTRIBUTE(adv_max_interval_fops, adv_max_interval_get,
1059 adv_max_interval_set, "%llu\n");
1060
1061static int min_key_size_set(void *data, u64 val)
1062{
1063 struct hci_dev *hdev = data;
1064
1065 hci_dev_lock(hdev);
1066 if (val > hdev->le_max_key_size || val < SMP_MIN_ENC_KEY_SIZE) {
1067 hci_dev_unlock(hdev);
1068 return -EINVAL;
1069 }
1070
1071 hdev->le_min_key_size = val;
1072 hci_dev_unlock(hdev);
1073
1074 return 0;
1075}
1076
1077static int min_key_size_get(void *data, u64 *val)
1078{
1079 struct hci_dev *hdev = data;
1080
1081 hci_dev_lock(hdev);
1082 *val = hdev->le_min_key_size;
1083 hci_dev_unlock(hdev);
1084
1085 return 0;
1086}
1087
1088DEFINE_DEBUGFS_ATTRIBUTE(min_key_size_fops, min_key_size_get,
1089 min_key_size_set, "%llu\n");
1090
1091static int max_key_size_set(void *data, u64 val)
1092{
1093 struct hci_dev *hdev = data;
1094
1095 hci_dev_lock(hdev);
1096 if (val > SMP_MAX_ENC_KEY_SIZE || val < hdev->le_min_key_size) {
1097 hci_dev_unlock(hdev);
1098 return -EINVAL;
1099 }
1100
1101 hdev->le_max_key_size = val;
1102 hci_dev_unlock(hdev);
1103
1104 return 0;
1105}
1106
1107static int max_key_size_get(void *data, u64 *val)
1108{
1109 struct hci_dev *hdev = data;
1110
1111 hci_dev_lock(hdev);
1112 *val = hdev->le_max_key_size;
1113 hci_dev_unlock(hdev);
1114
1115 return 0;
1116}
1117
1118DEFINE_DEBUGFS_ATTRIBUTE(max_key_size_fops, max_key_size_get,
1119 max_key_size_set, "%llu\n");
1120
1121static int auth_payload_timeout_set(void *data, u64 val)
1122{
1123 struct hci_dev *hdev = data;
1124
1125 if (val < 0x0001 || val > 0xffff)
1126 return -EINVAL;
1127
1128 hci_dev_lock(hdev);
1129 hdev->auth_payload_timeout = val;
1130 hci_dev_unlock(hdev);
1131
1132 return 0;
1133}
1134
1135static int auth_payload_timeout_get(void *data, u64 *val)
1136{
1137 struct hci_dev *hdev = data;
1138
1139 hci_dev_lock(hdev);
1140 *val = hdev->auth_payload_timeout;
1141 hci_dev_unlock(hdev);
1142
1143 return 0;
1144}
1145
1146DEFINE_DEBUGFS_ATTRIBUTE(auth_payload_timeout_fops,
1147 auth_payload_timeout_get,
1148 auth_payload_timeout_set, "%llu\n");
1149
1150static ssize_t force_no_mitm_read(struct file *file,
1151 char __user *user_buf,
1152 size_t count, loff_t *ppos)
1153{
1154 struct hci_dev *hdev = file->private_data;
1155 char buf[3];
1156
1157 buf[0] = hci_dev_test_flag(hdev, HCI_FORCE_NO_MITM) ? 'Y' : 'N';
1158 buf[1] = '\n';
1159 buf[2] = '\0';
1160 return simple_read_from_buffer(to: user_buf, count, ppos, from: buf, available: 2);
1161}
1162
1163static ssize_t force_no_mitm_write(struct file *file,
1164 const char __user *user_buf,
1165 size_t count, loff_t *ppos)
1166{
1167 struct hci_dev *hdev = file->private_data;
1168 char buf[32];
1169 size_t buf_size = min(count, (sizeof(buf) - 1));
1170 bool enable;
1171
1172 if (copy_from_user(to: buf, from: user_buf, n: buf_size))
1173 return -EFAULT;
1174
1175 buf[buf_size] = '\0';
1176 if (kstrtobool(s: buf, res: &enable))
1177 return -EINVAL;
1178
1179 if (enable == hci_dev_test_flag(hdev, HCI_FORCE_NO_MITM))
1180 return -EALREADY;
1181
1182 hci_dev_change_flag(hdev, HCI_FORCE_NO_MITM);
1183
1184 return count;
1185}
1186
1187static const struct file_operations force_no_mitm_fops = {
1188 .open = simple_open,
1189 .read = force_no_mitm_read,
1190 .write = force_no_mitm_write,
1191 .llseek = default_llseek,
1192};
1193
1194DEFINE_QUIRK_ATTRIBUTE(quirk_strict_duplicate_filter,
1195 HCI_QUIRK_STRICT_DUPLICATE_FILTER);
1196DEFINE_QUIRK_ATTRIBUTE(quirk_simultaneous_discovery,
1197 HCI_QUIRK_SIMULTANEOUS_DISCOVERY);
1198
1199void hci_debugfs_create_le(struct hci_dev *hdev)
1200{
1201 debugfs_create_file(name: "identity", mode: 0400, parent: hdev->debugfs, data: hdev,
1202 fops: &identity_fops);
1203 debugfs_create_file(name: "rpa_timeout", mode: 0644, parent: hdev->debugfs, data: hdev,
1204 fops: &rpa_timeout_fops);
1205 debugfs_create_file(name: "random_address", mode: 0444, parent: hdev->debugfs, data: hdev,
1206 fops: &random_address_fops);
1207 debugfs_create_file(name: "static_address", mode: 0444, parent: hdev->debugfs, data: hdev,
1208 fops: &static_address_fops);
1209
1210 /* For controllers with a public address, provide a debug
1211 * option to force the usage of the configured static
1212 * address. By default the public address is used.
1213 */
1214 if (bacmp(ba1: &hdev->bdaddr, BDADDR_ANY))
1215 debugfs_create_file(name: "force_static_address", mode: 0644,
1216 parent: hdev->debugfs, data: hdev,
1217 fops: &force_static_address_fops);
1218
1219 debugfs_create_u8(name: "white_list_size", mode: 0444, parent: hdev->debugfs,
1220 value: &hdev->le_accept_list_size);
1221 debugfs_create_file(name: "white_list", mode: 0444, parent: hdev->debugfs, data: hdev,
1222 fops: &white_list_fops);
1223 debugfs_create_u8(name: "resolv_list_size", mode: 0444, parent: hdev->debugfs,
1224 value: &hdev->le_resolv_list_size);
1225 debugfs_create_file(name: "resolv_list", mode: 0444, parent: hdev->debugfs, data: hdev,
1226 fops: &resolv_list_fops);
1227 debugfs_create_file(name: "identity_resolving_keys", mode: 0400, parent: hdev->debugfs,
1228 data: hdev, fops: &identity_resolving_keys_fops);
1229 debugfs_create_file(name: "long_term_keys", mode: 0400, parent: hdev->debugfs, data: hdev,
1230 fops: &long_term_keys_fops);
1231 debugfs_create_file(name: "conn_min_interval", mode: 0644, parent: hdev->debugfs, data: hdev,
1232 fops: &conn_min_interval_fops);
1233 debugfs_create_file(name: "conn_max_interval", mode: 0644, parent: hdev->debugfs, data: hdev,
1234 fops: &conn_max_interval_fops);
1235 debugfs_create_file(name: "conn_latency", mode: 0644, parent: hdev->debugfs, data: hdev,
1236 fops: &conn_latency_fops);
1237 debugfs_create_file(name: "supervision_timeout", mode: 0644, parent: hdev->debugfs, data: hdev,
1238 fops: &supervision_timeout_fops);
1239 debugfs_create_file(name: "adv_channel_map", mode: 0644, parent: hdev->debugfs, data: hdev,
1240 fops: &adv_channel_map_fops);
1241 debugfs_create_file(name: "adv_min_interval", mode: 0644, parent: hdev->debugfs, data: hdev,
1242 fops: &adv_min_interval_fops);
1243 debugfs_create_file(name: "adv_max_interval", mode: 0644, parent: hdev->debugfs, data: hdev,
1244 fops: &adv_max_interval_fops);
1245 debugfs_create_u16(name: "discov_interleaved_timeout", mode: 0644, parent: hdev->debugfs,
1246 value: &hdev->discov_interleaved_timeout);
1247 debugfs_create_file(name: "min_key_size", mode: 0644, parent: hdev->debugfs, data: hdev,
1248 fops: &min_key_size_fops);
1249 debugfs_create_file(name: "max_key_size", mode: 0644, parent: hdev->debugfs, data: hdev,
1250 fops: &max_key_size_fops);
1251 debugfs_create_file(name: "auth_payload_timeout", mode: 0644, parent: hdev->debugfs, data: hdev,
1252 fops: &auth_payload_timeout_fops);
1253 debugfs_create_file(name: "force_no_mitm", mode: 0644, parent: hdev->debugfs, data: hdev,
1254 fops: &force_no_mitm_fops);
1255
1256 debugfs_create_file(name: "quirk_strict_duplicate_filter", mode: 0644,
1257 parent: hdev->debugfs, data: hdev,
1258 fops: &quirk_strict_duplicate_filter_fops);
1259 debugfs_create_file(name: "quirk_simultaneous_discovery", mode: 0644,
1260 parent: hdev->debugfs, data: hdev,
1261 fops: &quirk_simultaneous_discovery_fops);
1262}
1263
1264void hci_debugfs_create_conn(struct hci_conn *conn)
1265{
1266 struct hci_dev *hdev = conn->hdev;
1267 char name[6];
1268
1269 if (IS_ERR_OR_NULL(ptr: hdev->debugfs) || conn->debugfs)
1270 return;
1271
1272 snprintf(buf: name, size: sizeof(name), fmt: "%u", conn->handle);
1273 conn->debugfs = debugfs_create_dir(name, parent: hdev->debugfs);
1274}
1275
1276static ssize_t dut_mode_read(struct file *file, char __user *user_buf,
1277 size_t count, loff_t *ppos)
1278{
1279 struct hci_dev *hdev = file->private_data;
1280 char buf[3];
1281
1282 buf[0] = hci_dev_test_flag(hdev, HCI_DUT_MODE) ? 'Y' : 'N';
1283 buf[1] = '\n';
1284 buf[2] = '\0';
1285 return simple_read_from_buffer(to: user_buf, count, ppos, from: buf, available: 2);
1286}
1287
1288static ssize_t dut_mode_write(struct file *file, const char __user *user_buf,
1289 size_t count, loff_t *ppos)
1290{
1291 struct hci_dev *hdev = file->private_data;
1292 struct sk_buff *skb;
1293 bool enable;
1294 int err;
1295
1296 if (!test_bit(HCI_UP, &hdev->flags))
1297 return -ENETDOWN;
1298
1299 err = kstrtobool_from_user(s: user_buf, count, res: &enable);
1300 if (err)
1301 return err;
1302
1303 if (enable == hci_dev_test_flag(hdev, HCI_DUT_MODE))
1304 return -EALREADY;
1305
1306 hci_req_sync_lock(hdev);
1307 if (enable)
1308 skb = __hci_cmd_sync(hdev, HCI_OP_ENABLE_DUT_MODE, plen: 0, NULL,
1309 HCI_CMD_TIMEOUT);
1310 else
1311 skb = __hci_cmd_sync(hdev, HCI_OP_RESET, plen: 0, NULL,
1312 HCI_CMD_TIMEOUT);
1313 hci_req_sync_unlock(hdev);
1314
1315 if (IS_ERR(ptr: skb))
1316 return PTR_ERR(ptr: skb);
1317
1318 kfree_skb(skb);
1319
1320 hci_dev_change_flag(hdev, HCI_DUT_MODE);
1321
1322 return count;
1323}
1324
1325static const struct file_operations dut_mode_fops = {
1326 .open = simple_open,
1327 .read = dut_mode_read,
1328 .write = dut_mode_write,
1329 .llseek = default_llseek,
1330};
1331
1332static ssize_t vendor_diag_read(struct file *file, char __user *user_buf,
1333 size_t count, loff_t *ppos)
1334{
1335 struct hci_dev *hdev = file->private_data;
1336 char buf[3];
1337
1338 buf[0] = hci_dev_test_flag(hdev, HCI_VENDOR_DIAG) ? 'Y' : 'N';
1339 buf[1] = '\n';
1340 buf[2] = '\0';
1341 return simple_read_from_buffer(to: user_buf, count, ppos, from: buf, available: 2);
1342}
1343
1344static ssize_t vendor_diag_write(struct file *file, const char __user *user_buf,
1345 size_t count, loff_t *ppos)
1346{
1347 struct hci_dev *hdev = file->private_data;
1348 bool enable;
1349 int err;
1350
1351 err = kstrtobool_from_user(s: user_buf, count, res: &enable);
1352 if (err)
1353 return err;
1354
1355 /* When the diagnostic flags are not persistent and the transport
1356 * is not active or in user channel operation, then there is no need
1357 * for the vendor callback. Instead just store the desired value and
1358 * the setting will be programmed when the controller gets powered on.
1359 */
1360 if (test_bit(HCI_QUIRK_NON_PERSISTENT_DIAG, &hdev->quirks) &&
1361 (!test_bit(HCI_RUNNING, &hdev->flags) ||
1362 hci_dev_test_flag(hdev, HCI_USER_CHANNEL)))
1363 goto done;
1364
1365 hci_req_sync_lock(hdev);
1366 err = hdev->set_diag(hdev, enable);
1367 hci_req_sync_unlock(hdev);
1368
1369 if (err < 0)
1370 return err;
1371
1372done:
1373 if (enable)
1374 hci_dev_set_flag(hdev, HCI_VENDOR_DIAG);
1375 else
1376 hci_dev_clear_flag(hdev, HCI_VENDOR_DIAG);
1377
1378 return count;
1379}
1380
1381static const struct file_operations vendor_diag_fops = {
1382 .open = simple_open,
1383 .read = vendor_diag_read,
1384 .write = vendor_diag_write,
1385 .llseek = default_llseek,
1386};
1387
1388void hci_debugfs_create_basic(struct hci_dev *hdev)
1389{
1390 debugfs_create_file(name: "dut_mode", mode: 0644, parent: hdev->debugfs, data: hdev,
1391 fops: &dut_mode_fops);
1392
1393 if (hdev->set_diag)
1394 debugfs_create_file(name: "vendor_diag", mode: 0644, parent: hdev->debugfs, data: hdev,
1395 fops: &vendor_diag_fops);
1396}
1397

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