Bluetooth: l2cap: Fix lost wakeups waiting to accept socket
[linux-2.6.git] / net / bluetooth / hci_sysfs.c
1 /* Bluetooth HCI driver model support. */
2
3 #include <linux/kernel.h>
4 #include <linux/slab.h>
5 #include <linux/init.h>
6 #include <linux/debugfs.h>
7 #include <linux/seq_file.h>
8
9 #include <net/bluetooth/bluetooth.h>
10 #include <net/bluetooth/hci_core.h>
11
12 static struct class *bt_class;
13
14 struct dentry *bt_debugfs;
15 EXPORT_SYMBOL_GPL(bt_debugfs);
16
17 static inline char *link_typetostr(int type)
18 {
19         switch (type) {
20         case ACL_LINK:
21                 return "ACL";
22         case SCO_LINK:
23                 return "SCO";
24         case ESCO_LINK:
25                 return "eSCO";
26         default:
27                 return "UNKNOWN";
28         }
29 }
30
31 static ssize_t show_link_type(struct device *dev, struct device_attribute *attr, char *buf)
32 {
33         struct hci_conn *conn = dev_get_drvdata(dev);
34         return sprintf(buf, "%s\n", link_typetostr(conn->type));
35 }
36
37 static ssize_t show_link_address(struct device *dev, struct device_attribute *attr, char *buf)
38 {
39         struct hci_conn *conn = dev_get_drvdata(dev);
40         return sprintf(buf, "%s\n", batostr(&conn->dst));
41 }
42
43 static ssize_t show_link_features(struct device *dev, struct device_attribute *attr, char *buf)
44 {
45         struct hci_conn *conn = dev_get_drvdata(dev);
46
47         return sprintf(buf, "0x%02x%02x%02x%02x%02x%02x%02x%02x\n",
48                                 conn->features[0], conn->features[1],
49                                 conn->features[2], conn->features[3],
50                                 conn->features[4], conn->features[5],
51                                 conn->features[6], conn->features[7]);
52 }
53
54 #define LINK_ATTR(_name, _mode, _show, _store) \
55 struct device_attribute link_attr_##_name = __ATTR(_name, _mode, _show, _store)
56
57 static LINK_ATTR(type, S_IRUGO, show_link_type, NULL);
58 static LINK_ATTR(address, S_IRUGO, show_link_address, NULL);
59 static LINK_ATTR(features, S_IRUGO, show_link_features, NULL);
60
61 static struct attribute *bt_link_attrs[] = {
62         &link_attr_type.attr,
63         &link_attr_address.attr,
64         &link_attr_features.attr,
65         NULL
66 };
67
68 static struct attribute_group bt_link_group = {
69         .attrs = bt_link_attrs,
70 };
71
72 static const struct attribute_group *bt_link_groups[] = {
73         &bt_link_group,
74         NULL
75 };
76
77 static void bt_link_release(struct device *dev)
78 {
79         void *data = dev_get_drvdata(dev);
80         kfree(data);
81 }
82
83 static struct device_type bt_link = {
84         .name    = "link",
85         .groups  = bt_link_groups,
86         .release = bt_link_release,
87 };
88
89 static void add_conn(struct work_struct *work)
90 {
91         struct hci_conn *conn = container_of(work, struct hci_conn, work_add);
92         struct hci_dev *hdev = conn->hdev;
93
94         dev_set_name(&conn->dev, "%s:%d", hdev->name, conn->handle);
95
96         dev_set_drvdata(&conn->dev, conn);
97
98         if (device_add(&conn->dev) < 0) {
99                 BT_ERR("Failed to register connection device");
100                 return;
101         }
102
103         hci_dev_hold(hdev);
104 }
105
106 /*
107  * The rfcomm tty device will possibly retain even when conn
108  * is down, and sysfs doesn't support move zombie device,
109  * so we should move the device before conn device is destroyed.
110  */
111 static int __match_tty(struct device *dev, void *data)
112 {
113         return !strncmp(dev_name(dev), "rfcomm", 6);
114 }
115
116 static void del_conn(struct work_struct *work)
117 {
118         struct hci_conn *conn = container_of(work, struct hci_conn, work_del);
119         struct hci_dev *hdev = conn->hdev;
120
121         if (!device_is_registered(&conn->dev))
122                 return;
123
124         while (1) {
125                 struct device *dev;
126
127                 dev = device_find_child(&conn->dev, NULL, __match_tty);
128                 if (!dev)
129                         break;
130                 device_move(dev, NULL, DPM_ORDER_DEV_LAST);
131                 put_device(dev);
132         }
133
134         device_del(&conn->dev);
135         put_device(&conn->dev);
136
137         hci_dev_put(hdev);
138 }
139
140 void hci_conn_init_sysfs(struct hci_conn *conn)
141 {
142         struct hci_dev *hdev = conn->hdev;
143
144         BT_DBG("conn %p", conn);
145
146         conn->dev.type = &bt_link;
147         conn->dev.class = bt_class;
148         conn->dev.parent = &hdev->dev;
149
150         device_initialize(&conn->dev);
151
152         INIT_WORK(&conn->work_add, add_conn);
153         INIT_WORK(&conn->work_del, del_conn);
154 }
155
156 void hci_conn_add_sysfs(struct hci_conn *conn)
157 {
158         BT_DBG("conn %p", conn);
159
160         queue_work(conn->hdev->workqueue, &conn->work_add);
161 }
162
163 void hci_conn_del_sysfs(struct hci_conn *conn)
164 {
165         BT_DBG("conn %p", conn);
166
167         queue_work(conn->hdev->workqueue, &conn->work_del);
168 }
169
170 static inline char *host_bustostr(int bus)
171 {
172         switch (bus) {
173         case HCI_VIRTUAL:
174                 return "VIRTUAL";
175         case HCI_USB:
176                 return "USB";
177         case HCI_PCCARD:
178                 return "PCCARD";
179         case HCI_UART:
180                 return "UART";
181         case HCI_RS232:
182                 return "RS232";
183         case HCI_PCI:
184                 return "PCI";
185         case HCI_SDIO:
186                 return "SDIO";
187         default:
188                 return "UNKNOWN";
189         }
190 }
191
192 static inline char *host_typetostr(int type)
193 {
194         switch (type) {
195         case HCI_BREDR:
196                 return "BR/EDR";
197         case HCI_AMP:
198                 return "AMP";
199         default:
200                 return "UNKNOWN";
201         }
202 }
203
204 static ssize_t show_bus(struct device *dev, struct device_attribute *attr, char *buf)
205 {
206         struct hci_dev *hdev = dev_get_drvdata(dev);
207         return sprintf(buf, "%s\n", host_bustostr(hdev->bus));
208 }
209
210 static ssize_t show_type(struct device *dev, struct device_attribute *attr, char *buf)
211 {
212         struct hci_dev *hdev = dev_get_drvdata(dev);
213         return sprintf(buf, "%s\n", host_typetostr(hdev->dev_type));
214 }
215
216 static ssize_t show_name(struct device *dev, struct device_attribute *attr, char *buf)
217 {
218         struct hci_dev *hdev = dev_get_drvdata(dev);
219         char name[HCI_MAX_NAME_LENGTH + 1];
220         int i;
221
222         for (i = 0; i < HCI_MAX_NAME_LENGTH; i++)
223                 name[i] = hdev->dev_name[i];
224
225         name[HCI_MAX_NAME_LENGTH] = '\0';
226         return sprintf(buf, "%s\n", name);
227 }
228
229 static ssize_t show_class(struct device *dev, struct device_attribute *attr, char *buf)
230 {
231         struct hci_dev *hdev = dev_get_drvdata(dev);
232         return sprintf(buf, "0x%.2x%.2x%.2x\n",
233                         hdev->dev_class[2], hdev->dev_class[1], hdev->dev_class[0]);
234 }
235
236 static ssize_t show_address(struct device *dev, struct device_attribute *attr, char *buf)
237 {
238         struct hci_dev *hdev = dev_get_drvdata(dev);
239         return sprintf(buf, "%s\n", batostr(&hdev->bdaddr));
240 }
241
242 static ssize_t show_features(struct device *dev, struct device_attribute *attr, char *buf)
243 {
244         struct hci_dev *hdev = dev_get_drvdata(dev);
245
246         return sprintf(buf, "0x%02x%02x%02x%02x%02x%02x%02x%02x\n",
247                                 hdev->features[0], hdev->features[1],
248                                 hdev->features[2], hdev->features[3],
249                                 hdev->features[4], hdev->features[5],
250                                 hdev->features[6], hdev->features[7]);
251 }
252
253 static ssize_t show_manufacturer(struct device *dev, struct device_attribute *attr, char *buf)
254 {
255         struct hci_dev *hdev = dev_get_drvdata(dev);
256         return sprintf(buf, "%d\n", hdev->manufacturer);
257 }
258
259 static ssize_t show_hci_version(struct device *dev, struct device_attribute *attr, char *buf)
260 {
261         struct hci_dev *hdev = dev_get_drvdata(dev);
262         return sprintf(buf, "%d\n", hdev->hci_ver);
263 }
264
265 static ssize_t show_hci_revision(struct device *dev, struct device_attribute *attr, char *buf)
266 {
267         struct hci_dev *hdev = dev_get_drvdata(dev);
268         return sprintf(buf, "%d\n", hdev->hci_rev);
269 }
270
271 static ssize_t show_idle_timeout(struct device *dev, struct device_attribute *attr, char *buf)
272 {
273         struct hci_dev *hdev = dev_get_drvdata(dev);
274         return sprintf(buf, "%d\n", hdev->idle_timeout);
275 }
276
277 static ssize_t store_idle_timeout(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
278 {
279         struct hci_dev *hdev = dev_get_drvdata(dev);
280         unsigned int val;
281         int rv;
282
283         rv = kstrtouint(buf, 0, &val);
284         if (rv < 0)
285                 return rv;
286
287         if (val != 0 && (val < 500 || val > 3600000))
288                 return -EINVAL;
289
290         hdev->idle_timeout = val;
291
292         return count;
293 }
294
295 static ssize_t show_sniff_max_interval(struct device *dev, struct device_attribute *attr, char *buf)
296 {
297         struct hci_dev *hdev = dev_get_drvdata(dev);
298         return sprintf(buf, "%d\n", hdev->sniff_max_interval);
299 }
300
301 static ssize_t store_sniff_max_interval(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
302 {
303         struct hci_dev *hdev = dev_get_drvdata(dev);
304         u16 val;
305         int rv;
306
307         rv = kstrtou16(buf, 0, &val);
308         if (rv < 0)
309                 return rv;
310
311         if (val == 0 || val % 2 || val < hdev->sniff_min_interval)
312                 return -EINVAL;
313
314         hdev->sniff_max_interval = val;
315
316         return count;
317 }
318
319 static ssize_t show_sniff_min_interval(struct device *dev, struct device_attribute *attr, char *buf)
320 {
321         struct hci_dev *hdev = dev_get_drvdata(dev);
322         return sprintf(buf, "%d\n", hdev->sniff_min_interval);
323 }
324
325 static ssize_t store_sniff_min_interval(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
326 {
327         struct hci_dev *hdev = dev_get_drvdata(dev);
328         u16 val;
329         int rv;
330
331         rv = kstrtou16(buf, 0, &val);
332         if (rv < 0)
333                 return rv;
334
335         if (val == 0 || val % 2 || val > hdev->sniff_max_interval)
336                 return -EINVAL;
337
338         hdev->sniff_min_interval = val;
339
340         return count;
341 }
342
343 static DEVICE_ATTR(bus, S_IRUGO, show_bus, NULL);
344 static DEVICE_ATTR(type, S_IRUGO, show_type, NULL);
345 static DEVICE_ATTR(name, S_IRUGO, show_name, NULL);
346 static DEVICE_ATTR(class, S_IRUGO, show_class, NULL);
347 static DEVICE_ATTR(address, S_IRUGO, show_address, NULL);
348 static DEVICE_ATTR(features, S_IRUGO, show_features, NULL);
349 static DEVICE_ATTR(manufacturer, S_IRUGO, show_manufacturer, NULL);
350 static DEVICE_ATTR(hci_version, S_IRUGO, show_hci_version, NULL);
351 static DEVICE_ATTR(hci_revision, S_IRUGO, show_hci_revision, NULL);
352
353 static DEVICE_ATTR(idle_timeout, S_IRUGO | S_IWUSR,
354                                 show_idle_timeout, store_idle_timeout);
355 static DEVICE_ATTR(sniff_max_interval, S_IRUGO | S_IWUSR,
356                                 show_sniff_max_interval, store_sniff_max_interval);
357 static DEVICE_ATTR(sniff_min_interval, S_IRUGO | S_IWUSR,
358                                 show_sniff_min_interval, store_sniff_min_interval);
359
360 static struct attribute *bt_host_attrs[] = {
361         &dev_attr_bus.attr,
362         &dev_attr_type.attr,
363         &dev_attr_name.attr,
364         &dev_attr_class.attr,
365         &dev_attr_address.attr,
366         &dev_attr_features.attr,
367         &dev_attr_manufacturer.attr,
368         &dev_attr_hci_version.attr,
369         &dev_attr_hci_revision.attr,
370         &dev_attr_idle_timeout.attr,
371         &dev_attr_sniff_max_interval.attr,
372         &dev_attr_sniff_min_interval.attr,
373         NULL
374 };
375
376 static struct attribute_group bt_host_group = {
377         .attrs = bt_host_attrs,
378 };
379
380 static const struct attribute_group *bt_host_groups[] = {
381         &bt_host_group,
382         NULL
383 };
384
385 static void bt_host_release(struct device *dev)
386 {
387         void *data = dev_get_drvdata(dev);
388         kfree(data);
389 }
390
391 static struct device_type bt_host = {
392         .name    = "host",
393         .groups  = bt_host_groups,
394         .release = bt_host_release,
395 };
396
397 static int inquiry_cache_show(struct seq_file *f, void *p)
398 {
399         struct hci_dev *hdev = f->private;
400         struct inquiry_cache *cache = &hdev->inq_cache;
401         struct inquiry_entry *e;
402
403         hci_dev_lock_bh(hdev);
404
405         for (e = cache->list; e; e = e->next) {
406                 struct inquiry_data *data = &e->data;
407                 seq_printf(f, "%s %d %d %d 0x%.2x%.2x%.2x 0x%.4x %d %d %u\n",
408                            batostr(&data->bdaddr),
409                            data->pscan_rep_mode, data->pscan_period_mode,
410                            data->pscan_mode, data->dev_class[2],
411                            data->dev_class[1], data->dev_class[0],
412                            __le16_to_cpu(data->clock_offset),
413                            data->rssi, data->ssp_mode, e->timestamp);
414         }
415
416         hci_dev_unlock_bh(hdev);
417
418         return 0;
419 }
420
421 static int inquiry_cache_open(struct inode *inode, struct file *file)
422 {
423         return single_open(file, inquiry_cache_show, inode->i_private);
424 }
425
426 static const struct file_operations inquiry_cache_fops = {
427         .open           = inquiry_cache_open,
428         .read           = seq_read,
429         .llseek         = seq_lseek,
430         .release        = single_release,
431 };
432
433 static int blacklist_show(struct seq_file *f, void *p)
434 {
435         struct hci_dev *hdev = f->private;
436         struct list_head *l;
437
438         hci_dev_lock_bh(hdev);
439
440         list_for_each(l, &hdev->blacklist) {
441                 struct bdaddr_list *b;
442
443                 b = list_entry(l, struct bdaddr_list, list);
444
445                 seq_printf(f, "%s\n", batostr(&b->bdaddr));
446         }
447
448         hci_dev_unlock_bh(hdev);
449
450         return 0;
451 }
452
453 static int blacklist_open(struct inode *inode, struct file *file)
454 {
455         return single_open(file, blacklist_show, inode->i_private);
456 }
457
458 static const struct file_operations blacklist_fops = {
459         .open           = blacklist_open,
460         .read           = seq_read,
461         .llseek         = seq_lseek,
462         .release        = single_release,
463 };
464
465 static void print_bt_uuid(struct seq_file *f, u8 *uuid)
466 {
467         u32 data0, data4;
468         u16 data1, data2, data3, data5;
469
470         memcpy(&data0, &uuid[0], 4);
471         memcpy(&data1, &uuid[4], 2);
472         memcpy(&data2, &uuid[6], 2);
473         memcpy(&data3, &uuid[8], 2);
474         memcpy(&data4, &uuid[10], 4);
475         memcpy(&data5, &uuid[14], 2);
476
477         seq_printf(f, "%.8x-%.4x-%.4x-%.4x-%.8x%.4x\n",
478                                 ntohl(data0), ntohs(data1), ntohs(data2),
479                                 ntohs(data3), ntohl(data4), ntohs(data5));
480 }
481
482 static int uuids_show(struct seq_file *f, void *p)
483 {
484         struct hci_dev *hdev = f->private;
485         struct list_head *l;
486
487         hci_dev_lock_bh(hdev);
488
489         list_for_each(l, &hdev->uuids) {
490                 struct bt_uuid *uuid;
491
492                 uuid = list_entry(l, struct bt_uuid, list);
493
494                 print_bt_uuid(f, uuid->uuid);
495         }
496
497         hci_dev_unlock_bh(hdev);
498
499         return 0;
500 }
501
502 static int uuids_open(struct inode *inode, struct file *file)
503 {
504         return single_open(file, uuids_show, inode->i_private);
505 }
506
507 static const struct file_operations uuids_fops = {
508         .open           = uuids_open,
509         .read           = seq_read,
510         .llseek         = seq_lseek,
511         .release        = single_release,
512 };
513
514 static int auto_accept_delay_set(void *data, u64 val)
515 {
516         struct hci_dev *hdev = data;
517
518         hci_dev_lock_bh(hdev);
519
520         hdev->auto_accept_delay = val;
521
522         hci_dev_unlock_bh(hdev);
523
524         return 0;
525 }
526
527 static int auto_accept_delay_get(void *data, u64 *val)
528 {
529         struct hci_dev *hdev = data;
530
531         hci_dev_lock_bh(hdev);
532
533         *val = hdev->auto_accept_delay;
534
535         hci_dev_unlock_bh(hdev);
536
537         return 0;
538 }
539
540 DEFINE_SIMPLE_ATTRIBUTE(auto_accept_delay_fops, auto_accept_delay_get,
541                                         auto_accept_delay_set, "%llu\n");
542
543 int hci_register_sysfs(struct hci_dev *hdev)
544 {
545         struct device *dev = &hdev->dev;
546         int err;
547
548         BT_DBG("%p name %s bus %d", hdev, hdev->name, hdev->bus);
549
550         dev->type = &bt_host;
551         dev->class = bt_class;
552         dev->parent = hdev->parent;
553
554         dev_set_name(dev, "%s", hdev->name);
555
556         dev_set_drvdata(dev, hdev);
557
558         err = device_register(dev);
559         if (err < 0)
560                 return err;
561
562         if (!bt_debugfs)
563                 return 0;
564
565         hdev->debugfs = debugfs_create_dir(hdev->name, bt_debugfs);
566         if (!hdev->debugfs)
567                 return 0;
568
569         debugfs_create_file("inquiry_cache", 0444, hdev->debugfs,
570                                                 hdev, &inquiry_cache_fops);
571
572         debugfs_create_file("blacklist", 0444, hdev->debugfs,
573                                                 hdev, &blacklist_fops);
574
575         debugfs_create_file("uuids", 0444, hdev->debugfs, hdev, &uuids_fops);
576
577         debugfs_create_file("auto_accept_delay", 0444, hdev->debugfs, hdev,
578                                                 &auto_accept_delay_fops);
579         return 0;
580 }
581
582 void hci_unregister_sysfs(struct hci_dev *hdev)
583 {
584         BT_DBG("%p name %s bus %d", hdev, hdev->name, hdev->bus);
585
586         debugfs_remove_recursive(hdev->debugfs);
587
588         device_del(&hdev->dev);
589 }
590
591 int __init bt_sysfs_init(void)
592 {
593         bt_debugfs = debugfs_create_dir("bluetooth", NULL);
594
595         bt_class = class_create(THIS_MODULE, "bluetooth");
596         if (IS_ERR(bt_class))
597                 return PTR_ERR(bt_class);
598
599         return 0;
600 }
601
602 void bt_sysfs_cleanup(void)
603 {
604         class_destroy(bt_class);
605
606         debugfs_remove_recursive(bt_debugfs);
607 }