1
2
3#include <linux/debugfs.h>
4#include <linux/module.h>
5
6#include <net/bluetooth/bluetooth.h>
7#include <net/bluetooth/hci_core.h>
8
9static struct class *bt_class;
10
11struct dentry *bt_debugfs;
12EXPORT_SYMBOL_GPL(bt_debugfs);
13
14static inline char *link_typetostr(int type)
15{
16 switch (type) {
17 case ACL_LINK:
18 return "ACL";
19 case SCO_LINK:
20 return "SCO";
21 case ESCO_LINK:
22 return "eSCO";
23 case LE_LINK:
24 return "LE";
25 default:
26 return "UNKNOWN";
27 }
28}
29
30static ssize_t show_link_type(struct device *dev,
31 struct device_attribute *attr, char *buf)
32{
33 struct hci_conn *conn = to_hci_conn(dev);
34 return sprintf(buf, "%s\n", link_typetostr(conn->type));
35}
36
37static ssize_t show_link_address(struct device *dev,
38 struct device_attribute *attr, char *buf)
39{
40 struct hci_conn *conn = to_hci_conn(dev);
41 return sprintf(buf, "%s\n", batostr(&conn->dst));
42}
43
44static ssize_t show_link_features(struct device *dev,
45 struct device_attribute *attr, char *buf)
46{
47 struct hci_conn *conn = to_hci_conn(dev);
48
49 return sprintf(buf, "0x%02x%02x%02x%02x%02x%02x%02x%02x\n",
50 conn->features[0], conn->features[1],
51 conn->features[2], conn->features[3],
52 conn->features[4], conn->features[5],
53 conn->features[6], conn->features[7]);
54}
55
56#define LINK_ATTR(_name, _mode, _show, _store) \
57struct device_attribute link_attr_##_name = __ATTR(_name, _mode, _show, _store)
58
59static LINK_ATTR(type, S_IRUGO, show_link_type, NULL);
60static LINK_ATTR(address, S_IRUGO, show_link_address, NULL);
61static LINK_ATTR(features, S_IRUGO, show_link_features, NULL);
62
63static struct attribute *bt_link_attrs[] = {
64 &link_attr_type.attr,
65 &link_attr_address.attr,
66 &link_attr_features.attr,
67 NULL
68};
69
70static struct attribute_group bt_link_group = {
71 .attrs = bt_link_attrs,
72};
73
74static const struct attribute_group *bt_link_groups[] = {
75 &bt_link_group,
76 NULL
77};
78
79static void bt_link_release(struct device *dev)
80{
81 struct hci_conn *conn = to_hci_conn(dev);
82 kfree(conn);
83}
84
85static struct device_type bt_link = {
86 .name = "link",
87 .groups = bt_link_groups,
88 .release = bt_link_release,
89};
90
91
92
93
94
95
96static int __match_tty(struct device *dev, void *data)
97{
98 return !strncmp(dev_name(dev), "rfcomm", 6);
99}
100
101void hci_conn_init_sysfs(struct hci_conn *conn)
102{
103 struct hci_dev *hdev = conn->hdev;
104
105 BT_DBG("conn %p", conn);
106
107 conn->dev.type = &bt_link;
108 conn->dev.class = bt_class;
109 conn->dev.parent = &hdev->dev;
110
111 device_initialize(&conn->dev);
112}
113
114void hci_conn_add_sysfs(struct hci_conn *conn)
115{
116 struct hci_dev *hdev = conn->hdev;
117
118 BT_DBG("conn %p", conn);
119
120 dev_set_name(&conn->dev, "%s:%d", hdev->name, conn->handle);
121
122 if (device_add(&conn->dev) < 0) {
123 BT_ERR("Failed to register connection device");
124 return;
125 }
126
127 hci_dev_hold(hdev);
128}
129
130void hci_conn_del_sysfs(struct hci_conn *conn)
131{
132 struct hci_dev *hdev = conn->hdev;
133
134 if (!device_is_registered(&conn->dev))
135 return;
136
137 while (1) {
138 struct device *dev;
139
140 dev = device_find_child(&conn->dev, NULL, __match_tty);
141 if (!dev)
142 break;
143 device_move(dev, NULL, DPM_ORDER_DEV_LAST);
144 put_device(dev);
145 }
146
147 device_del(&conn->dev);
148 put_device(&conn->dev);
149
150 hci_dev_put(hdev);
151}
152
153static inline char *host_bustostr(int bus)
154{
155 switch (bus) {
156 case HCI_VIRTUAL:
157 return "VIRTUAL";
158 case HCI_USB:
159 return "USB";
160 case HCI_PCCARD:
161 return "PCCARD";
162 case HCI_UART:
163 return "UART";
164 case HCI_RS232:
165 return "RS232";
166 case HCI_PCI:
167 return "PCI";
168 case HCI_SDIO:
169 return "SDIO";
170 default:
171 return "UNKNOWN";
172 }
173}
174
175static inline char *host_typetostr(int type)
176{
177 switch (type) {
178 case HCI_BREDR:
179 return "BR/EDR";
180 case HCI_AMP:
181 return "AMP";
182 default:
183 return "UNKNOWN";
184 }
185}
186
187static ssize_t show_bus(struct device *dev,
188 struct device_attribute *attr, char *buf)
189{
190 struct hci_dev *hdev = to_hci_dev(dev);
191 return sprintf(buf, "%s\n", host_bustostr(hdev->bus));
192}
193
194static ssize_t show_type(struct device *dev,
195 struct device_attribute *attr, char *buf)
196{
197 struct hci_dev *hdev = to_hci_dev(dev);
198 return sprintf(buf, "%s\n", host_typetostr(hdev->dev_type));
199}
200
201static ssize_t show_name(struct device *dev,
202 struct device_attribute *attr, char *buf)
203{
204 struct hci_dev *hdev = to_hci_dev(dev);
205 char name[HCI_MAX_NAME_LENGTH + 1];
206 int i;
207
208 for (i = 0; i < HCI_MAX_NAME_LENGTH; i++)
209 name[i] = hdev->dev_name[i];
210
211 name[HCI_MAX_NAME_LENGTH] = '\0';
212 return sprintf(buf, "%s\n", name);
213}
214
215static ssize_t show_class(struct device *dev,
216 struct device_attribute *attr, char *buf)
217{
218 struct hci_dev *hdev = to_hci_dev(dev);
219 return sprintf(buf, "0x%.2x%.2x%.2x\n", hdev->dev_class[2],
220 hdev->dev_class[1], hdev->dev_class[0]);
221}
222
223static ssize_t show_address(struct device *dev,
224 struct device_attribute *attr, char *buf)
225{
226 struct hci_dev *hdev = to_hci_dev(dev);
227 return sprintf(buf, "%s\n", batostr(&hdev->bdaddr));
228}
229
230static ssize_t show_features(struct device *dev,
231 struct device_attribute *attr, char *buf)
232{
233 struct hci_dev *hdev = to_hci_dev(dev);
234
235 return sprintf(buf, "0x%02x%02x%02x%02x%02x%02x%02x%02x\n",
236 hdev->features[0], hdev->features[1],
237 hdev->features[2], hdev->features[3],
238 hdev->features[4], hdev->features[5],
239 hdev->features[6], hdev->features[7]);
240}
241
242static ssize_t show_manufacturer(struct device *dev,
243 struct device_attribute *attr, char *buf)
244{
245 struct hci_dev *hdev = to_hci_dev(dev);
246 return sprintf(buf, "%d\n", hdev->manufacturer);
247}
248
249static ssize_t show_hci_version(struct device *dev,
250 struct device_attribute *attr, char *buf)
251{
252 struct hci_dev *hdev = to_hci_dev(dev);
253 return sprintf(buf, "%d\n", hdev->hci_ver);
254}
255
256static ssize_t show_hci_revision(struct device *dev,
257 struct device_attribute *attr, char *buf)
258{
259 struct hci_dev *hdev = to_hci_dev(dev);
260 return sprintf(buf, "%d\n", hdev->hci_rev);
261}
262
263static ssize_t show_idle_timeout(struct device *dev,
264 struct device_attribute *attr, char *buf)
265{
266 struct hci_dev *hdev = to_hci_dev(dev);
267 return sprintf(buf, "%d\n", hdev->idle_timeout);
268}
269
270static ssize_t store_idle_timeout(struct device *dev,
271 struct device_attribute *attr,
272 const char *buf, size_t count)
273{
274 struct hci_dev *hdev = to_hci_dev(dev);
275 unsigned int val;
276 int rv;
277
278 rv = kstrtouint(buf, 0, &val);
279 if (rv < 0)
280 return rv;
281
282 if (val != 0 && (val < 500 || val > 3600000))
283 return -EINVAL;
284
285 hdev->idle_timeout = val;
286
287 return count;
288}
289
290static ssize_t show_sniff_max_interval(struct device *dev,
291 struct device_attribute *attr, char *buf)
292{
293 struct hci_dev *hdev = to_hci_dev(dev);
294 return sprintf(buf, "%d\n", hdev->sniff_max_interval);
295}
296
297static ssize_t store_sniff_max_interval(struct device *dev,
298 struct device_attribute *attr,
299 const char *buf, size_t count)
300{
301 struct hci_dev *hdev = to_hci_dev(dev);
302 u16 val;
303 int rv;
304
305 rv = kstrtou16(buf, 0, &val);
306 if (rv < 0)
307 return rv;
308
309 if (val == 0 || val % 2 || val < hdev->sniff_min_interval)
310 return -EINVAL;
311
312 hdev->sniff_max_interval = val;
313
314 return count;
315}
316
317static ssize_t show_sniff_min_interval(struct device *dev,
318 struct device_attribute *attr, char *buf)
319{
320 struct hci_dev *hdev = to_hci_dev(dev);
321 return sprintf(buf, "%d\n", hdev->sniff_min_interval);
322}
323
324static ssize_t store_sniff_min_interval(struct device *dev,
325 struct device_attribute *attr,
326 const char *buf, size_t count)
327{
328 struct hci_dev *hdev = to_hci_dev(dev);
329 u16 val;
330 int rv;
331
332 rv = kstrtou16(buf, 0, &val);
333 if (rv < 0)
334 return rv;
335
336 if (val == 0 || val % 2 || val > hdev->sniff_max_interval)
337 return -EINVAL;
338
339 hdev->sniff_min_interval = val;
340
341 return count;
342}
343
344static DEVICE_ATTR(bus, S_IRUGO, show_bus, NULL);
345static DEVICE_ATTR(type, S_IRUGO, show_type, NULL);
346static DEVICE_ATTR(name, S_IRUGO, show_name, NULL);
347static DEVICE_ATTR(class, S_IRUGO, show_class, NULL);
348static DEVICE_ATTR(address, S_IRUGO, show_address, NULL);
349static DEVICE_ATTR(features, S_IRUGO, show_features, NULL);
350static DEVICE_ATTR(manufacturer, S_IRUGO, show_manufacturer, NULL);
351static DEVICE_ATTR(hci_version, S_IRUGO, show_hci_version, NULL);
352static DEVICE_ATTR(hci_revision, S_IRUGO, show_hci_revision, NULL);
353
354static DEVICE_ATTR(idle_timeout, S_IRUGO | S_IWUSR,
355 show_idle_timeout, store_idle_timeout);
356static DEVICE_ATTR(sniff_max_interval, S_IRUGO | S_IWUSR,
357 show_sniff_max_interval, store_sniff_max_interval);
358static DEVICE_ATTR(sniff_min_interval, S_IRUGO | S_IWUSR,
359 show_sniff_min_interval, store_sniff_min_interval);
360
361static struct attribute *bt_host_attrs[] = {
362 &dev_attr_bus.attr,
363 &dev_attr_type.attr,
364 &dev_attr_name.attr,
365 &dev_attr_class.attr,
366 &dev_attr_address.attr,
367 &dev_attr_features.attr,
368 &dev_attr_manufacturer.attr,
369 &dev_attr_hci_version.attr,
370 &dev_attr_hci_revision.attr,
371 &dev_attr_idle_timeout.attr,
372 &dev_attr_sniff_max_interval.attr,
373 &dev_attr_sniff_min_interval.attr,
374 NULL
375};
376
377static struct attribute_group bt_host_group = {
378 .attrs = bt_host_attrs,
379};
380
381static const struct attribute_group *bt_host_groups[] = {
382 &bt_host_group,
383 NULL
384};
385
386static void bt_host_release(struct device *dev)
387{
388 struct hci_dev *hdev = to_hci_dev(dev);
389 kfree(hdev);
390 module_put(THIS_MODULE);
391}
392
393static struct device_type bt_host = {
394 .name = "host",
395 .groups = bt_host_groups,
396 .release = bt_host_release,
397};
398
399static int inquiry_cache_show(struct seq_file *f, void *p)
400{
401 struct hci_dev *hdev = f->private;
402 struct discovery_state *cache = &hdev->discovery;
403 struct inquiry_entry *e;
404
405 hci_dev_lock(hdev);
406
407 list_for_each_entry(e, &cache->all, all) {
408 struct inquiry_data *data = &e->data;
409 seq_printf(f, "%s %d %d %d 0x%.2x%.2x%.2x 0x%.4x %d %d %u\n",
410 batostr(&data->bdaddr),
411 data->pscan_rep_mode, data->pscan_period_mode,
412 data->pscan_mode, data->dev_class[2],
413 data->dev_class[1], data->dev_class[0],
414 __le16_to_cpu(data->clock_offset),
415 data->rssi, data->ssp_mode, e->timestamp);
416 }
417
418 hci_dev_unlock(hdev);
419
420 return 0;
421}
422
423static int inquiry_cache_open(struct inode *inode, struct file *file)
424{
425 return single_open(file, inquiry_cache_show, inode->i_private);
426}
427
428static const struct file_operations inquiry_cache_fops = {
429 .open = inquiry_cache_open,
430 .read = seq_read,
431 .llseek = seq_lseek,
432 .release = single_release,
433};
434
435static int blacklist_show(struct seq_file *f, void *p)
436{
437 struct hci_dev *hdev = f->private;
438 struct bdaddr_list *b;
439
440 hci_dev_lock(hdev);
441
442 list_for_each_entry(b, &hdev->blacklist, list)
443 seq_printf(f, "%s\n", batostr(&b->bdaddr));
444
445 hci_dev_unlock(hdev);
446
447 return 0;
448}
449
450static int blacklist_open(struct inode *inode, struct file *file)
451{
452 return single_open(file, blacklist_show, inode->i_private);
453}
454
455static const struct file_operations blacklist_fops = {
456 .open = blacklist_open,
457 .read = seq_read,
458 .llseek = seq_lseek,
459 .release = single_release,
460};
461
462static void print_bt_uuid(struct seq_file *f, u8 *uuid)
463{
464 __be32 data0, data4;
465 __be16 data1, data2, data3, data5;
466
467 memcpy(&data0, &uuid[0], 4);
468 memcpy(&data1, &uuid[4], 2);
469 memcpy(&data2, &uuid[6], 2);
470 memcpy(&data3, &uuid[8], 2);
471 memcpy(&data4, &uuid[10], 4);
472 memcpy(&data5, &uuid[14], 2);
473
474 seq_printf(f, "%.8x-%.4x-%.4x-%.4x-%.8x%.4x\n",
475 ntohl(data0), ntohs(data1), ntohs(data2), ntohs(data3),
476 ntohl(data4), ntohs(data5));
477}
478
479static int uuids_show(struct seq_file *f, void *p)
480{
481 struct hci_dev *hdev = f->private;
482 struct bt_uuid *uuid;
483
484 hci_dev_lock(hdev);
485
486 list_for_each_entry(uuid, &hdev->uuids, list)
487 print_bt_uuid(f, uuid->uuid);
488
489 hci_dev_unlock(hdev);
490
491 return 0;
492}
493
494static int uuids_open(struct inode *inode, struct file *file)
495{
496 return single_open(file, uuids_show, inode->i_private);
497}
498
499static const struct file_operations uuids_fops = {
500 .open = uuids_open,
501 .read = seq_read,
502 .llseek = seq_lseek,
503 .release = single_release,
504};
505
506static int auto_accept_delay_set(void *data, u64 val)
507{
508 struct hci_dev *hdev = data;
509
510 hci_dev_lock(hdev);
511
512 hdev->auto_accept_delay = val;
513
514 hci_dev_unlock(hdev);
515
516 return 0;
517}
518
519static int auto_accept_delay_get(void *data, u64 *val)
520{
521 struct hci_dev *hdev = data;
522
523 hci_dev_lock(hdev);
524
525 *val = hdev->auto_accept_delay;
526
527 hci_dev_unlock(hdev);
528
529 return 0;
530}
531
532DEFINE_SIMPLE_ATTRIBUTE(auto_accept_delay_fops, auto_accept_delay_get,
533 auto_accept_delay_set, "%llu\n");
534
535void hci_init_sysfs(struct hci_dev *hdev)
536{
537 struct device *dev = &hdev->dev;
538
539 dev->type = &bt_host;
540 dev->class = bt_class;
541
542 __module_get(THIS_MODULE);
543 device_initialize(dev);
544}
545
546int hci_add_sysfs(struct hci_dev *hdev)
547{
548 struct device *dev = &hdev->dev;
549 int err;
550
551 BT_DBG("%p name %s bus %d", hdev, hdev->name, hdev->bus);
552
553 dev_set_name(dev, "%s", hdev->name);
554
555 err = device_add(dev);
556 if (err < 0)
557 return err;
558
559 if (!bt_debugfs)
560 return 0;
561
562 hdev->debugfs = debugfs_create_dir(hdev->name, bt_debugfs);
563 if (!hdev->debugfs)
564 return 0;
565
566 debugfs_create_file("inquiry_cache", 0444, hdev->debugfs,
567 hdev, &inquiry_cache_fops);
568
569 debugfs_create_file("blacklist", 0444, hdev->debugfs,
570 hdev, &blacklist_fops);
571
572 debugfs_create_file("uuids", 0444, hdev->debugfs, hdev, &uuids_fops);
573
574 debugfs_create_file("auto_accept_delay", 0444, hdev->debugfs, hdev,
575 &auto_accept_delay_fops);
576 return 0;
577}
578
579void hci_del_sysfs(struct hci_dev *hdev)
580{
581 BT_DBG("%p name %s bus %d", hdev, hdev->name, hdev->bus);
582
583 debugfs_remove_recursive(hdev->debugfs);
584
585 device_del(&hdev->dev);
586}
587
588int __init bt_sysfs_init(void)
589{
590 bt_debugfs = debugfs_create_dir("bluetooth", NULL);
591
592 bt_class = class_create(THIS_MODULE, "bluetooth");
593 if (IS_ERR(bt_class))
594 return PTR_ERR(bt_class);
595
596 return 0;
597}
598
599void bt_sysfs_cleanup(void)
600{
601 class_destroy(bt_class);
602
603 debugfs_remove_recursive(bt_debugfs);
604}
605
