Bluetooth: Fix hci_inquiry ioctl usage
[linux-3.10.git] / net / bluetooth / hci_sysfs.c
1 /* Bluetooth HCI driver model support. */
2
3 #include <linux/debugfs.h>
4 #include <linux/module.h>
5 #include <asm/unaligned.h>
6
7 #include <net/bluetooth/bluetooth.h>
8 #include <net/bluetooth/hci_core.h>
9
10 static struct class *bt_class;
11
12 struct dentry *bt_debugfs;
13 EXPORT_SYMBOL_GPL(bt_debugfs);
14
15 static inline char *link_typetostr(int type)
16 {
17         switch (type) {
18         case ACL_LINK:
19                 return "ACL";
20         case SCO_LINK:
21                 return "SCO";
22         case ESCO_LINK:
23                 return "eSCO";
24         case LE_LINK:
25                 return "LE";
26         default:
27                 return "UNKNOWN";
28         }
29 }
30
31 static ssize_t show_link_type(struct device *dev,
32                               struct device_attribute *attr, char *buf)
33 {
34         struct hci_conn *conn = to_hci_conn(dev);
35         return sprintf(buf, "%s\n", link_typetostr(conn->type));
36 }
37
38 static ssize_t show_link_address(struct device *dev,
39                                  struct device_attribute *attr, char *buf)
40 {
41         struct hci_conn *conn = to_hci_conn(dev);
42         return sprintf(buf, "%pMR\n", &conn->dst);
43 }
44
45 static ssize_t show_link_features(struct device *dev,
46                                   struct device_attribute *attr, char *buf)
47 {
48         struct hci_conn *conn = to_hci_conn(dev);
49
50         return sprintf(buf, "0x%02x%02x%02x%02x%02x%02x%02x%02x\n",
51                        conn->features[0], conn->features[1],
52                        conn->features[2], conn->features[3],
53                        conn->features[4], conn->features[5],
54                        conn->features[6], conn->features[7]);
55 }
56
57 #define LINK_ATTR(_name, _mode, _show, _store) \
58 struct device_attribute link_attr_##_name = __ATTR(_name, _mode, _show, _store)
59
60 static LINK_ATTR(type, S_IRUGO, show_link_type, NULL);
61 static LINK_ATTR(address, S_IRUGO, show_link_address, NULL);
62 static LINK_ATTR(features, S_IRUGO, show_link_features, NULL);
63
64 static struct attribute *bt_link_attrs[] = {
65         &link_attr_type.attr,
66         &link_attr_address.attr,
67         &link_attr_features.attr,
68         NULL
69 };
70
71 static struct attribute_group bt_link_group = {
72         .attrs = bt_link_attrs,
73 };
74
75 static const struct attribute_group *bt_link_groups[] = {
76         &bt_link_group,
77         NULL
78 };
79
80 static void bt_link_release(struct device *dev)
81 {
82         struct hci_conn *conn = to_hci_conn(dev);
83         kfree(conn);
84 }
85
86 static struct device_type bt_link = {
87         .name    = "link",
88         .groups  = bt_link_groups,
89         .release = bt_link_release,
90 };
91
92 /*
93  * The rfcomm tty device will possibly retain even when conn
94  * is down, and sysfs doesn't support move zombie device,
95  * so we should move the device before conn device is destroyed.
96  */
97 static int __match_tty(struct device *dev, void *data)
98 {
99         return !strncmp(dev_name(dev), "rfcomm", 6);
100 }
101
102 void hci_conn_init_sysfs(struct hci_conn *conn)
103 {
104         struct hci_dev *hdev = conn->hdev;
105
106         BT_DBG("conn %p", conn);
107
108         conn->dev.type = &bt_link;
109         conn->dev.class = bt_class;
110         conn->dev.parent = &hdev->dev;
111
112         device_initialize(&conn->dev);
113 }
114
115 void hci_conn_add_sysfs(struct hci_conn *conn)
116 {
117         struct hci_dev *hdev = conn->hdev;
118
119         BT_DBG("conn %p", conn);
120
121         dev_set_name(&conn->dev, "%s:%d", hdev->name, conn->handle);
122
123         if (device_add(&conn->dev) < 0) {
124                 BT_ERR("Failed to register connection device");
125                 return;
126         }
127
128         hci_dev_hold(hdev);
129 }
130
131 void hci_conn_del_sysfs(struct hci_conn *conn)
132 {
133         struct hci_dev *hdev = conn->hdev;
134
135         if (!device_is_registered(&conn->dev))
136                 return;
137
138         while (1) {
139                 struct device *dev;
140
141                 dev = device_find_child(&conn->dev, NULL, __match_tty);
142                 if (!dev)
143                         break;
144                 device_move(dev, NULL, DPM_ORDER_DEV_LAST);
145                 put_device(dev);
146         }
147
148         device_del(&conn->dev);
149         put_device(&conn->dev);
150
151         hci_dev_put(hdev);
152 }
153
154 static inline char *host_bustostr(int bus)
155 {
156         switch (bus) {
157         case HCI_VIRTUAL:
158                 return "VIRTUAL";
159         case HCI_USB:
160                 return "USB";
161         case HCI_PCCARD:
162                 return "PCCARD";
163         case HCI_UART:
164                 return "UART";
165         case HCI_RS232:
166                 return "RS232";
167         case HCI_PCI:
168                 return "PCI";
169         case HCI_SDIO:
170                 return "SDIO";
171         default:
172                 return "UNKNOWN";
173         }
174 }
175
176 static inline char *host_typetostr(int type)
177 {
178         switch (type) {
179         case HCI_BREDR:
180                 return "BR/EDR";
181         case HCI_AMP:
182                 return "AMP";
183         default:
184                 return "UNKNOWN";
185         }
186 }
187
188 static ssize_t show_bus(struct device *dev,
189                         struct device_attribute *attr, char *buf)
190 {
191         struct hci_dev *hdev = to_hci_dev(dev);
192         return sprintf(buf, "%s\n", host_bustostr(hdev->bus));
193 }
194
195 static ssize_t show_type(struct device *dev,
196                          struct device_attribute *attr, char *buf)
197 {
198         struct hci_dev *hdev = to_hci_dev(dev);
199         return sprintf(buf, "%s\n", host_typetostr(hdev->dev_type));
200 }
201
202 static ssize_t show_name(struct device *dev,
203                          struct device_attribute *attr, char *buf)
204 {
205         struct hci_dev *hdev = to_hci_dev(dev);
206         char name[HCI_MAX_NAME_LENGTH + 1];
207         int i;
208
209         for (i = 0; i < HCI_MAX_NAME_LENGTH; i++)
210                 name[i] = hdev->dev_name[i];
211
212         name[HCI_MAX_NAME_LENGTH] = '\0';
213         return sprintf(buf, "%s\n", name);
214 }
215
216 static ssize_t show_class(struct device *dev,
217                           struct device_attribute *attr, char *buf)
218 {
219         struct hci_dev *hdev = to_hci_dev(dev);
220         return sprintf(buf, "0x%.2x%.2x%.2x\n", hdev->dev_class[2],
221                        hdev->dev_class[1], hdev->dev_class[0]);
222 }
223
224 static ssize_t show_address(struct device *dev,
225                             struct device_attribute *attr, char *buf)
226 {
227         struct hci_dev *hdev = to_hci_dev(dev);
228         return sprintf(buf, "%pMR\n", &hdev->bdaddr);
229 }
230
231 static ssize_t show_features(struct device *dev,
232                              struct device_attribute *attr, char *buf)
233 {
234         struct hci_dev *hdev = to_hci_dev(dev);
235
236         return sprintf(buf, "0x%02x%02x%02x%02x%02x%02x%02x%02x\n",
237                        hdev->features[0], hdev->features[1],
238                        hdev->features[2], hdev->features[3],
239                        hdev->features[4], hdev->features[5],
240                        hdev->features[6], hdev->features[7]);
241 }
242
243 static ssize_t show_manufacturer(struct device *dev,
244                                  struct device_attribute *attr, char *buf)
245 {
246         struct hci_dev *hdev = to_hci_dev(dev);
247         return sprintf(buf, "%d\n", hdev->manufacturer);
248 }
249
250 static ssize_t show_hci_version(struct device *dev,
251                                 struct device_attribute *attr, char *buf)
252 {
253         struct hci_dev *hdev = to_hci_dev(dev);
254         return sprintf(buf, "%d\n", hdev->hci_ver);
255 }
256
257 static ssize_t show_hci_revision(struct device *dev,
258                                  struct device_attribute *attr, char *buf)
259 {
260         struct hci_dev *hdev = to_hci_dev(dev);
261         return sprintf(buf, "%d\n", hdev->hci_rev);
262 }
263
264 static ssize_t show_idle_timeout(struct device *dev,
265                                  struct device_attribute *attr, char *buf)
266 {
267         struct hci_dev *hdev = to_hci_dev(dev);
268         return sprintf(buf, "%d\n", hdev->idle_timeout);
269 }
270
271 static ssize_t store_idle_timeout(struct device *dev,
272                                   struct device_attribute *attr,
273                                   const char *buf, size_t count)
274 {
275         struct hci_dev *hdev = to_hci_dev(dev);
276         unsigned int val;
277         int rv;
278
279         rv = kstrtouint(buf, 0, &val);
280         if (rv < 0)
281                 return rv;
282
283         if (val != 0 && (val < 500 || val > 3600000))
284                 return -EINVAL;
285
286         hdev->idle_timeout = val;
287
288         return count;
289 }
290
291 static ssize_t show_sniff_max_interval(struct device *dev,
292                                        struct device_attribute *attr, char *buf)
293 {
294         struct hci_dev *hdev = to_hci_dev(dev);
295         return sprintf(buf, "%d\n", hdev->sniff_max_interval);
296 }
297
298 static ssize_t store_sniff_max_interval(struct device *dev,
299                                         struct device_attribute *attr,
300                                         const char *buf, size_t count)
301 {
302         struct hci_dev *hdev = to_hci_dev(dev);
303         u16 val;
304         int rv;
305
306         rv = kstrtou16(buf, 0, &val);
307         if (rv < 0)
308                 return rv;
309
310         if (val == 0 || val % 2 || val < hdev->sniff_min_interval)
311                 return -EINVAL;
312
313         hdev->sniff_max_interval = val;
314
315         return count;
316 }
317
318 static ssize_t show_sniff_min_interval(struct device *dev,
319                                        struct device_attribute *attr, char *buf)
320 {
321         struct hci_dev *hdev = to_hci_dev(dev);
322         return sprintf(buf, "%d\n", hdev->sniff_min_interval);
323 }
324
325 static ssize_t store_sniff_min_interval(struct device *dev,
326                                         struct device_attribute *attr,
327                                         const char *buf, size_t count)
328 {
329         struct hci_dev *hdev = to_hci_dev(dev);
330         u16 val;
331         int rv;
332
333         rv = kstrtou16(buf, 0, &val);
334         if (rv < 0)
335                 return rv;
336
337         if (val == 0 || val % 2 || val > hdev->sniff_max_interval)
338                 return -EINVAL;
339
340         hdev->sniff_min_interval = val;
341
342         return count;
343 }
344
345 static DEVICE_ATTR(bus, S_IRUGO, show_bus, NULL);
346 static DEVICE_ATTR(type, S_IRUGO, show_type, NULL);
347 static DEVICE_ATTR(name, S_IRUGO, show_name, NULL);
348 static DEVICE_ATTR(class, S_IRUGO, show_class, NULL);
349 static DEVICE_ATTR(address, S_IRUGO, show_address, NULL);
350 static DEVICE_ATTR(features, S_IRUGO, show_features, NULL);
351 static DEVICE_ATTR(manufacturer, S_IRUGO, show_manufacturer, NULL);
352 static DEVICE_ATTR(hci_version, S_IRUGO, show_hci_version, NULL);
353 static DEVICE_ATTR(hci_revision, S_IRUGO, show_hci_revision, NULL);
354
355 static DEVICE_ATTR(idle_timeout, S_IRUGO | S_IWUSR,
356                    show_idle_timeout, store_idle_timeout);
357 static DEVICE_ATTR(sniff_max_interval, S_IRUGO | S_IWUSR,
358                    show_sniff_max_interval, store_sniff_max_interval);
359 static DEVICE_ATTR(sniff_min_interval, S_IRUGO | S_IWUSR,
360                    show_sniff_min_interval, store_sniff_min_interval);
361
362 static struct attribute *bt_host_attrs[] = {
363         &dev_attr_bus.attr,
364         &dev_attr_type.attr,
365         &dev_attr_name.attr,
366         &dev_attr_class.attr,
367         &dev_attr_address.attr,
368         &dev_attr_features.attr,
369         &dev_attr_manufacturer.attr,
370         &dev_attr_hci_version.attr,
371         &dev_attr_hci_revision.attr,
372         &dev_attr_idle_timeout.attr,
373         &dev_attr_sniff_max_interval.attr,
374         &dev_attr_sniff_min_interval.attr,
375         NULL
376 };
377
378 static struct attribute_group bt_host_group = {
379         .attrs = bt_host_attrs,
380 };
381
382 static const struct attribute_group *bt_host_groups[] = {
383         &bt_host_group,
384         NULL
385 };
386
387 static void bt_host_release(struct device *dev)
388 {
389         struct hci_dev *hdev = to_hci_dev(dev);
390         kfree(hdev);
391         module_put(THIS_MODULE);
392 }
393
394 static struct device_type bt_host = {
395         .name    = "host",
396         .groups  = bt_host_groups,
397         .release = bt_host_release,
398 };
399
400 static int inquiry_cache_show(struct seq_file *f, void *p)
401 {
402         struct hci_dev *hdev = f->private;
403         struct discovery_state *cache = &hdev->discovery;
404         struct inquiry_entry *e;
405
406         hci_dev_lock(hdev);
407
408         list_for_each_entry(e, &cache->all, all) {
409                 struct inquiry_data *data = &e->data;
410                 seq_printf(f, "%pMR %d %d %d 0x%.2x%.2x%.2x 0x%.4x %d %d %u\n",
411                            &data->bdaddr,
412                            data->pscan_rep_mode, data->pscan_period_mode,
413                            data->pscan_mode, data->dev_class[2],
414                            data->dev_class[1], data->dev_class[0],
415                            __le16_to_cpu(data->clock_offset),
416                            data->rssi, data->ssp_mode, e->timestamp);
417         }
418
419         hci_dev_unlock(hdev);
420
421         return 0;
422 }
423
424 static int inquiry_cache_open(struct inode *inode, struct file *file)
425 {
426         return single_open(file, inquiry_cache_show, inode->i_private);
427 }
428
429 static const struct file_operations inquiry_cache_fops = {
430         .open           = inquiry_cache_open,
431         .read           = seq_read,
432         .llseek         = seq_lseek,
433         .release        = single_release,
434 };
435
436 static int blacklist_show(struct seq_file *f, void *p)
437 {
438         struct hci_dev *hdev = f->private;
439         struct bdaddr_list *b;
440
441         hci_dev_lock(hdev);
442
443         list_for_each_entry(b, &hdev->blacklist, list)
444                 seq_printf(f, "%pMR\n", &b->bdaddr);
445
446         hci_dev_unlock(hdev);
447
448         return 0;
449 }
450
451 static int blacklist_open(struct inode *inode, struct file *file)
452 {
453         return single_open(file, blacklist_show, inode->i_private);
454 }
455
456 static const struct file_operations blacklist_fops = {
457         .open           = blacklist_open,
458         .read           = seq_read,
459         .llseek         = seq_lseek,
460         .release        = single_release,
461 };
462
463 static void print_bt_uuid(struct seq_file *f, u8 *uuid)
464 {
465         u32 data0, data5;
466         u16 data1, data2, data3, data4;
467
468         data5 = get_unaligned_le32(uuid);
469         data4 = get_unaligned_le16(uuid + 4);
470         data3 = get_unaligned_le16(uuid + 6);
471         data2 = get_unaligned_le16(uuid + 8);
472         data1 = get_unaligned_le16(uuid + 10);
473         data0 = get_unaligned_le32(uuid + 12);
474
475         seq_printf(f, "%.8x-%.4x-%.4x-%.4x-%.4x%.8x\n",
476                    data0, data1, data2, data3, data4, data5);
477 }
478
479 static 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
494 static int uuids_open(struct inode *inode, struct file *file)
495 {
496         return single_open(file, uuids_show, inode->i_private);
497 }
498
499 static const struct file_operations uuids_fops = {
500         .open           = uuids_open,
501         .read           = seq_read,
502         .llseek         = seq_lseek,
503         .release        = single_release,
504 };
505
506 static 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
519 static 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
532 DEFINE_SIMPLE_ATTRIBUTE(auto_accept_delay_fops, auto_accept_delay_get,
533                         auto_accept_delay_set, "%llu\n");
534
535 void 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
546 int 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
579 void 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
588 int __init bt_sysfs_init(void)
589 {
590         bt_debugfs = debugfs_create_dir("bluetooth", NULL);
591
592         bt_class = class_create(THIS_MODULE, "bluetooth");
593
594         return PTR_RET(bt_class);
595 }
596
597 void bt_sysfs_cleanup(void)
598 {
599         class_destroy(bt_class);
600
601         debugfs_remove_recursive(bt_debugfs);
602 }