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1/*
2 BlueZ - Bluetooth protocol stack for Linux
3 Copyright (C) 2000-2001 Qualcomm Incorporated
4
5 Written 2000,2001 by Maxim Krasnyansky <maxk@qualcomm.com>
6
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License version 2 as
9 published by the Free Software Foundation;
10
11 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
12 OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
13 FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT OF THIRD PARTY RIGHTS.
14 IN NO EVENT SHALL THE COPYRIGHT HOLDER(S) AND AUTHOR(S) BE LIABLE FOR ANY
15 CLAIM, OR ANY SPECIAL INDIRECT OR CONSEQUENTIAL DAMAGES, OR ANY DAMAGES
16 WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
17 ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
18 OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
19
20 ALL LIABILITY, INCLUDING LIABILITY FOR INFRINGEMENT OF ANY PATENTS,
21 COPYRIGHTS, TRADEMARKS OR OTHER RIGHTS, RELATING TO USE OF THIS
22 SOFTWARE IS DISCLAIMED.
23*/
24
25/* Bluetooth address family and sockets. */
26
27#include <linux/module.h>
28#include <linux/debugfs.h>
29#include <asm/ioctls.h>
30
31#include <net/bluetooth/bluetooth.h>
32#include <linux/proc_fs.h>
33
34#include "selftest.h"
35
36/* Bluetooth sockets */
37#define BT_MAX_PROTO 8
38static const struct net_proto_family *bt_proto[BT_MAX_PROTO];
39static DEFINE_RWLOCK(bt_proto_lock);
40
41static struct lock_class_key bt_lock_key[BT_MAX_PROTO];
42static const char *const bt_key_strings[BT_MAX_PROTO] = {
43 "sk_lock-AF_BLUETOOTH-BTPROTO_L2CAP",
44 "sk_lock-AF_BLUETOOTH-BTPROTO_HCI",
45 "sk_lock-AF_BLUETOOTH-BTPROTO_SCO",
46 "sk_lock-AF_BLUETOOTH-BTPROTO_RFCOMM",
47 "sk_lock-AF_BLUETOOTH-BTPROTO_BNEP",
48 "sk_lock-AF_BLUETOOTH-BTPROTO_CMTP",
49 "sk_lock-AF_BLUETOOTH-BTPROTO_HIDP",
50 "sk_lock-AF_BLUETOOTH-BTPROTO_AVDTP",
51};
52
53static struct lock_class_key bt_slock_key[BT_MAX_PROTO];
54static const char *const bt_slock_key_strings[BT_MAX_PROTO] = {
55 "slock-AF_BLUETOOTH-BTPROTO_L2CAP",
56 "slock-AF_BLUETOOTH-BTPROTO_HCI",
57 "slock-AF_BLUETOOTH-BTPROTO_SCO",
58 "slock-AF_BLUETOOTH-BTPROTO_RFCOMM",
59 "slock-AF_BLUETOOTH-BTPROTO_BNEP",
60 "slock-AF_BLUETOOTH-BTPROTO_CMTP",
61 "slock-AF_BLUETOOTH-BTPROTO_HIDP",
62 "slock-AF_BLUETOOTH-BTPROTO_AVDTP",
63};
64
65void bt_sock_reclassify_lock(struct sock *sk, int proto)
66{
67 BUG_ON(!sk);
68 BUG_ON(sock_owned_by_user(sk));
69
70 sock_lock_init_class_and_name(sk,
71 bt_slock_key_strings[proto], &bt_slock_key[proto],
72 bt_key_strings[proto], &bt_lock_key[proto]);
73}
74EXPORT_SYMBOL(bt_sock_reclassify_lock);
75
76int bt_sock_register(int proto, const struct net_proto_family *ops)
77{
78 int err = 0;
79
80 if (proto < 0 || proto >= BT_MAX_PROTO)
81 return -EINVAL;
82
83 write_lock(&bt_proto_lock);
84
85 if (bt_proto[proto])
86 err = -EEXIST;
87 else
88 bt_proto[proto] = ops;
89
90 write_unlock(&bt_proto_lock);
91
92 return err;
93}
94EXPORT_SYMBOL(bt_sock_register);
95
96void bt_sock_unregister(int proto)
97{
98 if (proto < 0 || proto >= BT_MAX_PROTO)
99 return;
100
101 write_lock(&bt_proto_lock);
102 bt_proto[proto] = NULL;
103 write_unlock(&bt_proto_lock);
104}
105EXPORT_SYMBOL(bt_sock_unregister);
106
107static int bt_sock_create(struct net *net, struct socket *sock, int proto,
108 int kern)
109{
110 int err;
111
112 if (net != &init_net)
113 return -EAFNOSUPPORT;
114
115 if (proto < 0 || proto >= BT_MAX_PROTO)
116 return -EINVAL;
117
118 if (!bt_proto[proto])
119 request_module("bt-proto-%d", proto);
120
121 err = -EPROTONOSUPPORT;
122
123 read_lock(&bt_proto_lock);
124
125 if (bt_proto[proto] && try_module_get(bt_proto[proto]->owner)) {
126 err = bt_proto[proto]->create(net, sock, proto, kern);
127 if (!err)
128 bt_sock_reclassify_lock(sock->sk, proto);
129 module_put(bt_proto[proto]->owner);
130 }
131
132 read_unlock(&bt_proto_lock);
133
134 return err;
135}
136
137void bt_sock_link(struct bt_sock_list *l, struct sock *sk)
138{
139 write_lock(&l->lock);
140 sk_add_node(sk, &l->head);
141 write_unlock(&l->lock);
142}
143EXPORT_SYMBOL(bt_sock_link);
144
145void bt_sock_unlink(struct bt_sock_list *l, struct sock *sk)
146{
147 write_lock(&l->lock);
148 sk_del_node_init(sk);
149 write_unlock(&l->lock);
150}
151EXPORT_SYMBOL(bt_sock_unlink);
152
153void bt_accept_enqueue(struct sock *parent, struct sock *sk)
154{
155 BT_DBG("parent %p, sk %p", parent, sk);
156
157 sock_hold(sk);
158 list_add_tail(&bt_sk(sk)->accept_q, &bt_sk(parent)->accept_q);
159 bt_sk(sk)->parent = parent;
160 parent->sk_ack_backlog++;
161}
162EXPORT_SYMBOL(bt_accept_enqueue);
163
164void bt_accept_unlink(struct sock *sk)
165{
166 BT_DBG("sk %p state %d", sk, sk->sk_state);
167
168 list_del_init(&bt_sk(sk)->accept_q);
169 bt_sk(sk)->parent->sk_ack_backlog--;
170 bt_sk(sk)->parent = NULL;
171 sock_put(sk);
172}
173EXPORT_SYMBOL(bt_accept_unlink);
174
175struct sock *bt_accept_dequeue(struct sock *parent, struct socket *newsock)
176{
177 struct bt_sock *s, *n;
178 struct sock *sk;
179
180 BT_DBG("parent %p", parent);
181
182 list_for_each_entry_safe(s, n, &bt_sk(parent)->accept_q, accept_q) {
183 sk = (struct sock *)s;
184
185 lock_sock(sk);
186
187 /* FIXME: Is this check still needed */
188 if (sk->sk_state == BT_CLOSED) {
189 bt_accept_unlink(sk);
190 release_sock(sk);
191 continue;
192 }
193
194 if (sk->sk_state == BT_CONNECTED || !newsock ||
195 test_bit(BT_SK_DEFER_SETUP, &bt_sk(parent)->flags)) {
196 bt_accept_unlink(sk);
197 if (newsock)
198 sock_graft(sk, newsock);
199
200 release_sock(sk);
201 return sk;
202 }
203
204 release_sock(sk);
205 }
206
207 return NULL;
208}
209EXPORT_SYMBOL(bt_accept_dequeue);
210
211int bt_sock_recvmsg(struct socket *sock, struct msghdr *msg, size_t len,
212 int flags)
213{
214 int noblock = flags & MSG_DONTWAIT;
215 struct sock *sk = sock->sk;
216 struct sk_buff *skb;
217 size_t copied;
218 int err;
219
220 BT_DBG("sock %p sk %p len %zu", sock, sk, len);
221
222 if (flags & MSG_OOB)
223 return -EOPNOTSUPP;
224
225 skb = skb_recv_datagram(sk, flags, noblock, &err);
226 if (!skb) {
227 if (sk->sk_shutdown & RCV_SHUTDOWN)
228 return 0;
229
230 return err;
231 }
232
233 copied = skb->len;
234 if (len < copied) {
235 msg->msg_flags |= MSG_TRUNC;
236 copied = len;
237 }
238
239 skb_reset_transport_header(skb);
240 err = skb_copy_datagram_msg(skb, 0, msg, copied);
241 if (err == 0) {
242 sock_recv_ts_and_drops(msg, sk, skb);
243
244 if (bt_sk(sk)->skb_msg_name)
245 bt_sk(sk)->skb_msg_name(skb, msg->msg_name,
246 &msg->msg_namelen);
247 }
248
249 skb_free_datagram(sk, skb);
250
251 return err ? : copied;
252}
253EXPORT_SYMBOL(bt_sock_recvmsg);
254
255static long bt_sock_data_wait(struct sock *sk, long timeo)
256{
257 DECLARE_WAITQUEUE(wait, current);
258
259 add_wait_queue(sk_sleep(sk), &wait);
260 for (;;) {
261 set_current_state(TASK_INTERRUPTIBLE);
262
263 if (!skb_queue_empty(&sk->sk_receive_queue))
264 break;
265
266 if (sk->sk_err || (sk->sk_shutdown & RCV_SHUTDOWN))
267 break;
268
269 if (signal_pending(current) || !timeo)
270 break;
271
272 sk_set_bit(SOCKWQ_ASYNC_WAITDATA, sk);
273 release_sock(sk);
274 timeo = schedule_timeout(timeo);
275 lock_sock(sk);
276 sk_clear_bit(SOCKWQ_ASYNC_WAITDATA, sk);
277 }
278
279 __set_current_state(TASK_RUNNING);
280 remove_wait_queue(sk_sleep(sk), &wait);
281 return timeo;
282}
283
284int bt_sock_stream_recvmsg(struct socket *sock, struct msghdr *msg,
285 size_t size, int flags)
286{
287 struct sock *sk = sock->sk;
288 int err = 0;
289 size_t target, copied = 0;
290 long timeo;
291
292 if (flags & MSG_OOB)
293 return -EOPNOTSUPP;
294
295 BT_DBG("sk %p size %zu", sk, size);
296
297 lock_sock(sk);
298
299 target = sock_rcvlowat(sk, flags & MSG_WAITALL, size);
300 timeo = sock_rcvtimeo(sk, flags & MSG_DONTWAIT);
301
302 do {
303 struct sk_buff *skb;
304 int chunk;
305
306 skb = skb_dequeue(&sk->sk_receive_queue);
307 if (!skb) {
308 if (copied >= target)
309 break;
310
311 err = sock_error(sk);
312 if (err)
313 break;
314 if (sk->sk_shutdown & RCV_SHUTDOWN)
315 break;
316
317 err = -EAGAIN;
318 if (!timeo)
319 break;
320
321 timeo = bt_sock_data_wait(sk, timeo);
322
323 if (signal_pending(current)) {
324 err = sock_intr_errno(timeo);
325 goto out;
326 }
327 continue;
328 }
329
330 chunk = min_t(unsigned int, skb->len, size);
331 if (skb_copy_datagram_msg(skb, 0, msg, chunk)) {
332 skb_queue_head(&sk->sk_receive_queue, skb);
333 if (!copied)
334 copied = -EFAULT;
335 break;
336 }
337 copied += chunk;
338 size -= chunk;
339
340 sock_recv_ts_and_drops(msg, sk, skb);
341
342 if (!(flags & MSG_PEEK)) {
343 int skb_len = skb_headlen(skb);
344
345 if (chunk <= skb_len) {
346 __skb_pull(skb, chunk);
347 } else {
348 struct sk_buff *frag;
349
350 __skb_pull(skb, skb_len);
351 chunk -= skb_len;
352
353 skb_walk_frags(skb, frag) {
354 if (chunk <= frag->len) {
355 /* Pulling partial data */
356 skb->len -= chunk;
357 skb->data_len -= chunk;
358 __skb_pull(frag, chunk);
359 break;
360 } else if (frag->len) {
361 /* Pulling all frag data */
362 chunk -= frag->len;
363 skb->len -= frag->len;
364 skb->data_len -= frag->len;
365 __skb_pull(frag, frag->len);
366 }
367 }
368 }
369
370 if (skb->len) {
371 skb_queue_head(&sk->sk_receive_queue, skb);
372 break;
373 }
374 kfree_skb(skb);
375
376 } else {
377 /* put message back and return */
378 skb_queue_head(&sk->sk_receive_queue, skb);
379 break;
380 }
381 } while (size);
382
383out:
384 release_sock(sk);
385 return copied ? : err;
386}
387EXPORT_SYMBOL(bt_sock_stream_recvmsg);
388
389static inline unsigned int bt_accept_poll(struct sock *parent)
390{
391 struct bt_sock *s, *n;
392 struct sock *sk;
393
394 list_for_each_entry_safe(s, n, &bt_sk(parent)->accept_q, accept_q) {
395 sk = (struct sock *)s;
396 if (sk->sk_state == BT_CONNECTED ||
397 (test_bit(BT_SK_DEFER_SETUP, &bt_sk(parent)->flags) &&
398 sk->sk_state == BT_CONNECT2))
399 return POLLIN | POLLRDNORM;
400 }
401
402 return 0;
403}
404
405unsigned int bt_sock_poll(struct file *file, struct socket *sock,
406 poll_table *wait)
407{
408 struct sock *sk = sock->sk;
409 unsigned int mask = 0;
410
411 BT_DBG("sock %p, sk %p", sock, sk);
412
413 poll_wait(file, sk_sleep(sk), wait);
414
415 if (sk->sk_state == BT_LISTEN)
416 return bt_accept_poll(sk);
417
418 if (sk->sk_err || !skb_queue_empty(&sk->sk_error_queue))
419 mask |= POLLERR |
420 (sock_flag(sk, SOCK_SELECT_ERR_QUEUE) ? POLLPRI : 0);
421
422 if (sk->sk_shutdown & RCV_SHUTDOWN)
423 mask |= POLLRDHUP | POLLIN | POLLRDNORM;
424
425 if (sk->sk_shutdown == SHUTDOWN_MASK)
426 mask |= POLLHUP;
427
428 if (!skb_queue_empty(&sk->sk_receive_queue))
429 mask |= POLLIN | POLLRDNORM;
430
431 if (sk->sk_state == BT_CLOSED)
432 mask |= POLLHUP;
433
434 if (sk->sk_state == BT_CONNECT ||
435 sk->sk_state == BT_CONNECT2 ||
436 sk->sk_state == BT_CONFIG)
437 return mask;
438
439 if (!test_bit(BT_SK_SUSPEND, &bt_sk(sk)->flags) && sock_writeable(sk))
440 mask |= POLLOUT | POLLWRNORM | POLLWRBAND;
441 else
442 sk_set_bit(SOCKWQ_ASYNC_NOSPACE, sk);
443
444 return mask;
445}
446EXPORT_SYMBOL(bt_sock_poll);
447
448int bt_sock_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
449{
450 struct sock *sk = sock->sk;
451 struct sk_buff *skb;
452 long amount;
453 int err;
454
455 BT_DBG("sk %p cmd %x arg %lx", sk, cmd, arg);
456
457 switch (cmd) {
458 case TIOCOUTQ:
459 if (sk->sk_state == BT_LISTEN)
460 return -EINVAL;
461
462 amount = sk->sk_sndbuf - sk_wmem_alloc_get(sk);
463 if (amount < 0)
464 amount = 0;
465 err = put_user(amount, (int __user *) arg);
466 break;
467
468 case TIOCINQ:
469 if (sk->sk_state == BT_LISTEN)
470 return -EINVAL;
471
472 lock_sock(sk);
473 skb = skb_peek(&sk->sk_receive_queue);
474 amount = skb ? skb->len : 0;
475 release_sock(sk);
476 err = put_user(amount, (int __user *) arg);
477 break;
478
479 case SIOCGSTAMP:
480 err = sock_get_timestamp(sk, (struct timeval __user *) arg);
481 break;
482
483 case SIOCGSTAMPNS:
484 err = sock_get_timestampns(sk, (struct timespec __user *) arg);
485 break;
486
487 default:
488 err = -ENOIOCTLCMD;
489 break;
490 }
491
492 return err;
493}
494EXPORT_SYMBOL(bt_sock_ioctl);
495
496/* This function expects the sk lock to be held when called */
497int bt_sock_wait_state(struct sock *sk, int state, unsigned long timeo)
498{
499 DECLARE_WAITQUEUE(wait, current);
500 int err = 0;
501
502 BT_DBG("sk %p", sk);
503
504 add_wait_queue(sk_sleep(sk), &wait);
505 set_current_state(TASK_INTERRUPTIBLE);
506 while (sk->sk_state != state) {
507 if (!timeo) {
508 err = -EINPROGRESS;
509 break;
510 }
511
512 if (signal_pending(current)) {
513 err = sock_intr_errno(timeo);
514 break;
515 }
516
517 release_sock(sk);
518 timeo = schedule_timeout(timeo);
519 lock_sock(sk);
520 set_current_state(TASK_INTERRUPTIBLE);
521
522 err = sock_error(sk);
523 if (err)
524 break;
525 }
526 __set_current_state(TASK_RUNNING);
527 remove_wait_queue(sk_sleep(sk), &wait);
528 return err;
529}
530EXPORT_SYMBOL(bt_sock_wait_state);
531
532/* This function expects the sk lock to be held when called */
533int bt_sock_wait_ready(struct sock *sk, unsigned long flags)
534{
535 DECLARE_WAITQUEUE(wait, current);
536 unsigned long timeo;
537 int err = 0;
538
539 BT_DBG("sk %p", sk);
540
541 timeo = sock_sndtimeo(sk, flags & O_NONBLOCK);
542
543 add_wait_queue(sk_sleep(sk), &wait);
544 set_current_state(TASK_INTERRUPTIBLE);
545 while (test_bit(BT_SK_SUSPEND, &bt_sk(sk)->flags)) {
546 if (!timeo) {
547 err = -EAGAIN;
548 break;
549 }
550
551 if (signal_pending(current)) {
552 err = sock_intr_errno(timeo);
553 break;
554 }
555
556 release_sock(sk);
557 timeo = schedule_timeout(timeo);
558 lock_sock(sk);
559 set_current_state(TASK_INTERRUPTIBLE);
560
561 err = sock_error(sk);
562 if (err)
563 break;
564 }
565 __set_current_state(TASK_RUNNING);
566 remove_wait_queue(sk_sleep(sk), &wait);
567
568 return err;
569}
570EXPORT_SYMBOL(bt_sock_wait_ready);
571
572#ifdef CONFIG_PROC_FS
573struct bt_seq_state {
574 struct bt_sock_list *l;
575};
576
577static void *bt_seq_start(struct seq_file *seq, loff_t *pos)
578 __acquires(seq->private->l->lock)
579{
580 struct bt_seq_state *s = seq->private;
581 struct bt_sock_list *l = s->l;
582
583 read_lock(&l->lock);
584 return seq_hlist_start_head(&l->head, *pos);
585}
586
587static void *bt_seq_next(struct seq_file *seq, void *v, loff_t *pos)
588{
589 struct bt_seq_state *s = seq->private;
590 struct bt_sock_list *l = s->l;
591
592 return seq_hlist_next(v, &l->head, pos);
593}
594
595static void bt_seq_stop(struct seq_file *seq, void *v)
596 __releases(seq->private->l->lock)
597{
598 struct bt_seq_state *s = seq->private;
599 struct bt_sock_list *l = s->l;
600
601 read_unlock(&l->lock);
602}
603
604static int bt_seq_show(struct seq_file *seq, void *v)
605{
606 struct bt_seq_state *s = seq->private;
607 struct bt_sock_list *l = s->l;
608
609 if (v == SEQ_START_TOKEN) {
610 seq_puts(seq ,"sk RefCnt Rmem Wmem User Inode Parent");
611
612 if (l->custom_seq_show) {
613 seq_putc(seq, ' ');
614 l->custom_seq_show(seq, v);
615 }
616
617 seq_putc(seq, '\n');
618 } else {
619 struct sock *sk = sk_entry(v);
620 struct bt_sock *bt = bt_sk(sk);
621
622 seq_printf(seq,
623 "%pK %-6d %-6u %-6u %-6u %-6lu %-6lu",
624 sk,
625 atomic_read(&sk->sk_refcnt),
626 sk_rmem_alloc_get(sk),
627 sk_wmem_alloc_get(sk),
628 from_kuid(seq_user_ns(seq), sock_i_uid(sk)),
629 sock_i_ino(sk),
630 bt->parent? sock_i_ino(bt->parent): 0LU);
631
632 if (l->custom_seq_show) {
633 seq_putc(seq, ' ');
634 l->custom_seq_show(seq, v);
635 }
636
637 seq_putc(seq, '\n');
638 }
639 return 0;
640}
641
642static const struct seq_operations bt_seq_ops = {
643 .start = bt_seq_start,
644 .next = bt_seq_next,
645 .stop = bt_seq_stop,
646 .show = bt_seq_show,
647};
648
649static int bt_seq_open(struct inode *inode, struct file *file)
650{
651 struct bt_sock_list *sk_list;
652 struct bt_seq_state *s;
653
654 sk_list = PDE_DATA(inode);
655 s = __seq_open_private(file, &bt_seq_ops,
656 sizeof(struct bt_seq_state));
657 if (!s)
658 return -ENOMEM;
659
660 s->l = sk_list;
661 return 0;
662}
663
664static const struct file_operations bt_fops = {
665 .open = bt_seq_open,
666 .read = seq_read,
667 .llseek = seq_lseek,
668 .release = seq_release_private
669};
670
671int bt_procfs_init(struct net *net, const char *name,
672 struct bt_sock_list *sk_list,
673 int (* seq_show)(struct seq_file *, void *))
674{
675 sk_list->custom_seq_show = seq_show;
676
677 if (!proc_create_data(name, 0, net->proc_net, &bt_fops, sk_list))
678 return -ENOMEM;
679 return 0;
680}
681
682void bt_procfs_cleanup(struct net *net, const char *name)
683{
684 remove_proc_entry(name, net->proc_net);
685}
686#else
687int bt_procfs_init(struct net *net, const char *name,
688 struct bt_sock_list *sk_list,
689 int (* seq_show)(struct seq_file *, void *))
690{
691 return 0;
692}
693
694void bt_procfs_cleanup(struct net *net, const char *name)
695{
696}
697#endif
698EXPORT_SYMBOL(bt_procfs_init);
699EXPORT_SYMBOL(bt_procfs_cleanup);
700
701static struct net_proto_family bt_sock_family_ops = {
702 .owner = THIS_MODULE,
703 .family = PF_BLUETOOTH,
704 .create = bt_sock_create,
705};
706
707struct dentry *bt_debugfs;
708EXPORT_SYMBOL_GPL(bt_debugfs);
709
710static int __init bt_init(void)
711{
712 int err;
713
714 sock_skb_cb_check_size(sizeof(struct bt_skb_cb));
715
716 BT_INFO("Core ver %s", BT_SUBSYS_VERSION);
717
718 err = bt_selftest();
719 if (err < 0)
720 return err;
721
722 bt_debugfs = debugfs_create_dir("bluetooth", NULL);
723
724 err = bt_sysfs_init();
725 if (err < 0)
726 return err;
727
728 err = sock_register(&bt_sock_family_ops);
729 if (err < 0) {
730 bt_sysfs_cleanup();
731 return err;
732 }
733
734 BT_INFO("HCI device and connection manager initialized");
735
736 err = hci_sock_init();
737 if (err < 0)
738 goto error;
739
740 err = l2cap_init();
741 if (err < 0)
742 goto sock_err;
743
744 err = sco_init();
745 if (err < 0) {
746 l2cap_exit();
747 goto sock_err;
748 }
749
750 err = mgmt_init();
751 if (err < 0) {
752 sco_exit();
753 l2cap_exit();
754 goto sock_err;
755 }
756
757 return 0;
758
759sock_err:
760 hci_sock_cleanup();
761
762error:
763 sock_unregister(PF_BLUETOOTH);
764 bt_sysfs_cleanup();
765
766 return err;
767}
768
769static void __exit bt_exit(void)
770{
771 mgmt_exit();
772
773 sco_exit();
774
775 l2cap_exit();
776
777 hci_sock_cleanup();
778
779 sock_unregister(PF_BLUETOOTH);
780
781 bt_sysfs_cleanup();
782
783 debugfs_remove_recursive(bt_debugfs);
784}
785
786subsys_initcall(bt_init);
787module_exit(bt_exit);
788
789MODULE_AUTHOR("Marcel Holtmann <marcel@holtmann.org>");
790MODULE_DESCRIPTION("Bluetooth Core ver " BT_SUBSYS_VERSION);
791MODULE_VERSION(BT_SUBSYS_VERSION);
792MODULE_LICENSE("GPL");
793MODULE_ALIAS_NETPROTO(PF_BLUETOOTH);
1/*
2 BlueZ - Bluetooth protocol stack for Linux
3 Copyright (C) 2000-2001 Qualcomm Incorporated
4
5 Written 2000,2001 by Maxim Krasnyansky <maxk@qualcomm.com>
6
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License version 2 as
9 published by the Free Software Foundation;
10
11 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
12 OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
13 FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT OF THIRD PARTY RIGHTS.
14 IN NO EVENT SHALL THE COPYRIGHT HOLDER(S) AND AUTHOR(S) BE LIABLE FOR ANY
15 CLAIM, OR ANY SPECIAL INDIRECT OR CONSEQUENTIAL DAMAGES, OR ANY DAMAGES
16 WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
17 ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
18 OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
19
20 ALL LIABILITY, INCLUDING LIABILITY FOR INFRINGEMENT OF ANY PATENTS,
21 COPYRIGHTS, TRADEMARKS OR OTHER RIGHTS, RELATING TO USE OF THIS
22 SOFTWARE IS DISCLAIMED.
23*/
24
25/* Bluetooth address family and sockets. */
26
27#include <linux/module.h>
28#include <linux/debugfs.h>
29#include <linux/stringify.h>
30#include <linux/sched/signal.h>
31
32#include <asm/ioctls.h>
33
34#include <net/bluetooth/bluetooth.h>
35#include <linux/proc_fs.h>
36
37#include "leds.h"
38#include "selftest.h"
39
40/* Bluetooth sockets */
41#define BT_MAX_PROTO 8
42static const struct net_proto_family *bt_proto[BT_MAX_PROTO];
43static DEFINE_RWLOCK(bt_proto_lock);
44
45static struct lock_class_key bt_lock_key[BT_MAX_PROTO];
46static const char *const bt_key_strings[BT_MAX_PROTO] = {
47 "sk_lock-AF_BLUETOOTH-BTPROTO_L2CAP",
48 "sk_lock-AF_BLUETOOTH-BTPROTO_HCI",
49 "sk_lock-AF_BLUETOOTH-BTPROTO_SCO",
50 "sk_lock-AF_BLUETOOTH-BTPROTO_RFCOMM",
51 "sk_lock-AF_BLUETOOTH-BTPROTO_BNEP",
52 "sk_lock-AF_BLUETOOTH-BTPROTO_CMTP",
53 "sk_lock-AF_BLUETOOTH-BTPROTO_HIDP",
54 "sk_lock-AF_BLUETOOTH-BTPROTO_AVDTP",
55};
56
57static struct lock_class_key bt_slock_key[BT_MAX_PROTO];
58static const char *const bt_slock_key_strings[BT_MAX_PROTO] = {
59 "slock-AF_BLUETOOTH-BTPROTO_L2CAP",
60 "slock-AF_BLUETOOTH-BTPROTO_HCI",
61 "slock-AF_BLUETOOTH-BTPROTO_SCO",
62 "slock-AF_BLUETOOTH-BTPROTO_RFCOMM",
63 "slock-AF_BLUETOOTH-BTPROTO_BNEP",
64 "slock-AF_BLUETOOTH-BTPROTO_CMTP",
65 "slock-AF_BLUETOOTH-BTPROTO_HIDP",
66 "slock-AF_BLUETOOTH-BTPROTO_AVDTP",
67};
68
69void bt_sock_reclassify_lock(struct sock *sk, int proto)
70{
71 BUG_ON(!sk);
72 BUG_ON(!sock_allow_reclassification(sk));
73
74 sock_lock_init_class_and_name(sk,
75 bt_slock_key_strings[proto], &bt_slock_key[proto],
76 bt_key_strings[proto], &bt_lock_key[proto]);
77}
78EXPORT_SYMBOL(bt_sock_reclassify_lock);
79
80int bt_sock_register(int proto, const struct net_proto_family *ops)
81{
82 int err = 0;
83
84 if (proto < 0 || proto >= BT_MAX_PROTO)
85 return -EINVAL;
86
87 write_lock(&bt_proto_lock);
88
89 if (bt_proto[proto])
90 err = -EEXIST;
91 else
92 bt_proto[proto] = ops;
93
94 write_unlock(&bt_proto_lock);
95
96 return err;
97}
98EXPORT_SYMBOL(bt_sock_register);
99
100void bt_sock_unregister(int proto)
101{
102 if (proto < 0 || proto >= BT_MAX_PROTO)
103 return;
104
105 write_lock(&bt_proto_lock);
106 bt_proto[proto] = NULL;
107 write_unlock(&bt_proto_lock);
108}
109EXPORT_SYMBOL(bt_sock_unregister);
110
111static int bt_sock_create(struct net *net, struct socket *sock, int proto,
112 int kern)
113{
114 int err;
115
116 if (net != &init_net)
117 return -EAFNOSUPPORT;
118
119 if (proto < 0 || proto >= BT_MAX_PROTO)
120 return -EINVAL;
121
122 if (!bt_proto[proto])
123 request_module("bt-proto-%d", proto);
124
125 err = -EPROTONOSUPPORT;
126
127 read_lock(&bt_proto_lock);
128
129 if (bt_proto[proto] && try_module_get(bt_proto[proto]->owner)) {
130 err = bt_proto[proto]->create(net, sock, proto, kern);
131 if (!err)
132 bt_sock_reclassify_lock(sock->sk, proto);
133 module_put(bt_proto[proto]->owner);
134 }
135
136 read_unlock(&bt_proto_lock);
137
138 return err;
139}
140
141void bt_sock_link(struct bt_sock_list *l, struct sock *sk)
142{
143 write_lock(&l->lock);
144 sk_add_node(sk, &l->head);
145 write_unlock(&l->lock);
146}
147EXPORT_SYMBOL(bt_sock_link);
148
149void bt_sock_unlink(struct bt_sock_list *l, struct sock *sk)
150{
151 write_lock(&l->lock);
152 sk_del_node_init(sk);
153 write_unlock(&l->lock);
154}
155EXPORT_SYMBOL(bt_sock_unlink);
156
157void bt_accept_enqueue(struct sock *parent, struct sock *sk, bool bh)
158{
159 BT_DBG("parent %p, sk %p", parent, sk);
160
161 sock_hold(sk);
162
163 if (bh)
164 bh_lock_sock_nested(sk);
165 else
166 lock_sock_nested(sk, SINGLE_DEPTH_NESTING);
167
168 list_add_tail(&bt_sk(sk)->accept_q, &bt_sk(parent)->accept_q);
169 bt_sk(sk)->parent = parent;
170
171 if (bh)
172 bh_unlock_sock(sk);
173 else
174 release_sock(sk);
175
176 sk_acceptq_added(parent);
177}
178EXPORT_SYMBOL(bt_accept_enqueue);
179
180/* Calling function must hold the sk lock.
181 * bt_sk(sk)->parent must be non-NULL meaning sk is in the parent list.
182 */
183void bt_accept_unlink(struct sock *sk)
184{
185 BT_DBG("sk %p state %d", sk, sk->sk_state);
186
187 list_del_init(&bt_sk(sk)->accept_q);
188 sk_acceptq_removed(bt_sk(sk)->parent);
189 bt_sk(sk)->parent = NULL;
190 sock_put(sk);
191}
192EXPORT_SYMBOL(bt_accept_unlink);
193
194struct sock *bt_accept_dequeue(struct sock *parent, struct socket *newsock)
195{
196 struct bt_sock *s, *n;
197 struct sock *sk;
198
199 BT_DBG("parent %p", parent);
200
201restart:
202 list_for_each_entry_safe(s, n, &bt_sk(parent)->accept_q, accept_q) {
203 sk = (struct sock *)s;
204
205 /* Prevent early freeing of sk due to unlink and sock_kill */
206 sock_hold(sk);
207 lock_sock(sk);
208
209 /* Check sk has not already been unlinked via
210 * bt_accept_unlink() due to serialisation caused by sk locking
211 */
212 if (!bt_sk(sk)->parent) {
213 BT_DBG("sk %p, already unlinked", sk);
214 release_sock(sk);
215 sock_put(sk);
216
217 /* Restart the loop as sk is no longer in the list
218 * and also avoid a potential infinite loop because
219 * list_for_each_entry_safe() is not thread safe.
220 */
221 goto restart;
222 }
223
224 /* sk is safely in the parent list so reduce reference count */
225 sock_put(sk);
226
227 /* FIXME: Is this check still needed */
228 if (sk->sk_state == BT_CLOSED) {
229 bt_accept_unlink(sk);
230 release_sock(sk);
231 continue;
232 }
233
234 if (sk->sk_state == BT_CONNECTED || !newsock ||
235 test_bit(BT_SK_DEFER_SETUP, &bt_sk(parent)->flags)) {
236 bt_accept_unlink(sk);
237 if (newsock)
238 sock_graft(sk, newsock);
239
240 release_sock(sk);
241 return sk;
242 }
243
244 release_sock(sk);
245 }
246
247 return NULL;
248}
249EXPORT_SYMBOL(bt_accept_dequeue);
250
251int bt_sock_recvmsg(struct socket *sock, struct msghdr *msg, size_t len,
252 int flags)
253{
254 int noblock = flags & MSG_DONTWAIT;
255 struct sock *sk = sock->sk;
256 struct sk_buff *skb;
257 size_t copied;
258 size_t skblen;
259 int err;
260
261 BT_DBG("sock %p sk %p len %zu", sock, sk, len);
262
263 if (flags & MSG_OOB)
264 return -EOPNOTSUPP;
265
266 skb = skb_recv_datagram(sk, flags, noblock, &err);
267 if (!skb) {
268 if (sk->sk_shutdown & RCV_SHUTDOWN)
269 return 0;
270
271 return err;
272 }
273
274 skblen = skb->len;
275 copied = skb->len;
276 if (len < copied) {
277 msg->msg_flags |= MSG_TRUNC;
278 copied = len;
279 }
280
281 skb_reset_transport_header(skb);
282 err = skb_copy_datagram_msg(skb, 0, msg, copied);
283 if (err == 0) {
284 sock_recv_ts_and_drops(msg, sk, skb);
285
286 if (msg->msg_name && bt_sk(sk)->skb_msg_name)
287 bt_sk(sk)->skb_msg_name(skb, msg->msg_name,
288 &msg->msg_namelen);
289
290 if (bt_sk(sk)->skb_put_cmsg)
291 bt_sk(sk)->skb_put_cmsg(skb, msg, sk);
292 }
293
294 skb_free_datagram(sk, skb);
295
296 if (flags & MSG_TRUNC)
297 copied = skblen;
298
299 return err ? : copied;
300}
301EXPORT_SYMBOL(bt_sock_recvmsg);
302
303static long bt_sock_data_wait(struct sock *sk, long timeo)
304{
305 DECLARE_WAITQUEUE(wait, current);
306
307 add_wait_queue(sk_sleep(sk), &wait);
308 for (;;) {
309 set_current_state(TASK_INTERRUPTIBLE);
310
311 if (!skb_queue_empty(&sk->sk_receive_queue))
312 break;
313
314 if (sk->sk_err || (sk->sk_shutdown & RCV_SHUTDOWN))
315 break;
316
317 if (signal_pending(current) || !timeo)
318 break;
319
320 sk_set_bit(SOCKWQ_ASYNC_WAITDATA, sk);
321 release_sock(sk);
322 timeo = schedule_timeout(timeo);
323 lock_sock(sk);
324 sk_clear_bit(SOCKWQ_ASYNC_WAITDATA, sk);
325 }
326
327 __set_current_state(TASK_RUNNING);
328 remove_wait_queue(sk_sleep(sk), &wait);
329 return timeo;
330}
331
332int bt_sock_stream_recvmsg(struct socket *sock, struct msghdr *msg,
333 size_t size, int flags)
334{
335 struct sock *sk = sock->sk;
336 int err = 0;
337 size_t target, copied = 0;
338 long timeo;
339
340 if (flags & MSG_OOB)
341 return -EOPNOTSUPP;
342
343 BT_DBG("sk %p size %zu", sk, size);
344
345 lock_sock(sk);
346
347 target = sock_rcvlowat(sk, flags & MSG_WAITALL, size);
348 timeo = sock_rcvtimeo(sk, flags & MSG_DONTWAIT);
349
350 do {
351 struct sk_buff *skb;
352 int chunk;
353
354 skb = skb_dequeue(&sk->sk_receive_queue);
355 if (!skb) {
356 if (copied >= target)
357 break;
358
359 err = sock_error(sk);
360 if (err)
361 break;
362 if (sk->sk_shutdown & RCV_SHUTDOWN)
363 break;
364
365 err = -EAGAIN;
366 if (!timeo)
367 break;
368
369 timeo = bt_sock_data_wait(sk, timeo);
370
371 if (signal_pending(current)) {
372 err = sock_intr_errno(timeo);
373 goto out;
374 }
375 continue;
376 }
377
378 chunk = min_t(unsigned int, skb->len, size);
379 if (skb_copy_datagram_msg(skb, 0, msg, chunk)) {
380 skb_queue_head(&sk->sk_receive_queue, skb);
381 if (!copied)
382 copied = -EFAULT;
383 break;
384 }
385 copied += chunk;
386 size -= chunk;
387
388 sock_recv_ts_and_drops(msg, sk, skb);
389
390 if (!(flags & MSG_PEEK)) {
391 int skb_len = skb_headlen(skb);
392
393 if (chunk <= skb_len) {
394 __skb_pull(skb, chunk);
395 } else {
396 struct sk_buff *frag;
397
398 __skb_pull(skb, skb_len);
399 chunk -= skb_len;
400
401 skb_walk_frags(skb, frag) {
402 if (chunk <= frag->len) {
403 /* Pulling partial data */
404 skb->len -= chunk;
405 skb->data_len -= chunk;
406 __skb_pull(frag, chunk);
407 break;
408 } else if (frag->len) {
409 /* Pulling all frag data */
410 chunk -= frag->len;
411 skb->len -= frag->len;
412 skb->data_len -= frag->len;
413 __skb_pull(frag, frag->len);
414 }
415 }
416 }
417
418 if (skb->len) {
419 skb_queue_head(&sk->sk_receive_queue, skb);
420 break;
421 }
422 kfree_skb(skb);
423
424 } else {
425 /* put message back and return */
426 skb_queue_head(&sk->sk_receive_queue, skb);
427 break;
428 }
429 } while (size);
430
431out:
432 release_sock(sk);
433 return copied ? : err;
434}
435EXPORT_SYMBOL(bt_sock_stream_recvmsg);
436
437static inline __poll_t bt_accept_poll(struct sock *parent)
438{
439 struct bt_sock *s, *n;
440 struct sock *sk;
441
442 list_for_each_entry_safe(s, n, &bt_sk(parent)->accept_q, accept_q) {
443 sk = (struct sock *)s;
444 if (sk->sk_state == BT_CONNECTED ||
445 (test_bit(BT_SK_DEFER_SETUP, &bt_sk(parent)->flags) &&
446 sk->sk_state == BT_CONNECT2))
447 return EPOLLIN | EPOLLRDNORM;
448 }
449
450 return 0;
451}
452
453__poll_t bt_sock_poll(struct file *file, struct socket *sock,
454 poll_table *wait)
455{
456 struct sock *sk = sock->sk;
457 __poll_t mask = 0;
458
459 poll_wait(file, sk_sleep(sk), wait);
460
461 if (sk->sk_state == BT_LISTEN)
462 return bt_accept_poll(sk);
463
464 if (sk->sk_err || !skb_queue_empty_lockless(&sk->sk_error_queue))
465 mask |= EPOLLERR |
466 (sock_flag(sk, SOCK_SELECT_ERR_QUEUE) ? EPOLLPRI : 0);
467
468 if (sk->sk_shutdown & RCV_SHUTDOWN)
469 mask |= EPOLLRDHUP | EPOLLIN | EPOLLRDNORM;
470
471 if (sk->sk_shutdown == SHUTDOWN_MASK)
472 mask |= EPOLLHUP;
473
474 if (!skb_queue_empty_lockless(&sk->sk_receive_queue))
475 mask |= EPOLLIN | EPOLLRDNORM;
476
477 if (sk->sk_state == BT_CLOSED)
478 mask |= EPOLLHUP;
479
480 if (sk->sk_state == BT_CONNECT ||
481 sk->sk_state == BT_CONNECT2 ||
482 sk->sk_state == BT_CONFIG)
483 return mask;
484
485 if (!test_bit(BT_SK_SUSPEND, &bt_sk(sk)->flags) && sock_writeable(sk))
486 mask |= EPOLLOUT | EPOLLWRNORM | EPOLLWRBAND;
487 else
488 sk_set_bit(SOCKWQ_ASYNC_NOSPACE, sk);
489
490 return mask;
491}
492EXPORT_SYMBOL(bt_sock_poll);
493
494int bt_sock_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
495{
496 struct sock *sk = sock->sk;
497 struct sk_buff *skb;
498 long amount;
499 int err;
500
501 BT_DBG("sk %p cmd %x arg %lx", sk, cmd, arg);
502
503 switch (cmd) {
504 case TIOCOUTQ:
505 if (sk->sk_state == BT_LISTEN)
506 return -EINVAL;
507
508 amount = sk->sk_sndbuf - sk_wmem_alloc_get(sk);
509 if (amount < 0)
510 amount = 0;
511 err = put_user(amount, (int __user *) arg);
512 break;
513
514 case TIOCINQ:
515 if (sk->sk_state == BT_LISTEN)
516 return -EINVAL;
517
518 lock_sock(sk);
519 skb = skb_peek(&sk->sk_receive_queue);
520 amount = skb ? skb->len : 0;
521 release_sock(sk);
522 err = put_user(amount, (int __user *) arg);
523 break;
524
525 default:
526 err = -ENOIOCTLCMD;
527 break;
528 }
529
530 return err;
531}
532EXPORT_SYMBOL(bt_sock_ioctl);
533
534/* This function expects the sk lock to be held when called */
535int bt_sock_wait_state(struct sock *sk, int state, unsigned long timeo)
536{
537 DECLARE_WAITQUEUE(wait, current);
538 int err = 0;
539
540 BT_DBG("sk %p", sk);
541
542 add_wait_queue(sk_sleep(sk), &wait);
543 set_current_state(TASK_INTERRUPTIBLE);
544 while (sk->sk_state != state) {
545 if (!timeo) {
546 err = -EINPROGRESS;
547 break;
548 }
549
550 if (signal_pending(current)) {
551 err = sock_intr_errno(timeo);
552 break;
553 }
554
555 release_sock(sk);
556 timeo = schedule_timeout(timeo);
557 lock_sock(sk);
558 set_current_state(TASK_INTERRUPTIBLE);
559
560 err = sock_error(sk);
561 if (err)
562 break;
563 }
564 __set_current_state(TASK_RUNNING);
565 remove_wait_queue(sk_sleep(sk), &wait);
566 return err;
567}
568EXPORT_SYMBOL(bt_sock_wait_state);
569
570/* This function expects the sk lock to be held when called */
571int bt_sock_wait_ready(struct sock *sk, unsigned long flags)
572{
573 DECLARE_WAITQUEUE(wait, current);
574 unsigned long timeo;
575 int err = 0;
576
577 BT_DBG("sk %p", sk);
578
579 timeo = sock_sndtimeo(sk, flags & O_NONBLOCK);
580
581 add_wait_queue(sk_sleep(sk), &wait);
582 set_current_state(TASK_INTERRUPTIBLE);
583 while (test_bit(BT_SK_SUSPEND, &bt_sk(sk)->flags)) {
584 if (!timeo) {
585 err = -EAGAIN;
586 break;
587 }
588
589 if (signal_pending(current)) {
590 err = sock_intr_errno(timeo);
591 break;
592 }
593
594 release_sock(sk);
595 timeo = schedule_timeout(timeo);
596 lock_sock(sk);
597 set_current_state(TASK_INTERRUPTIBLE);
598
599 err = sock_error(sk);
600 if (err)
601 break;
602 }
603 __set_current_state(TASK_RUNNING);
604 remove_wait_queue(sk_sleep(sk), &wait);
605
606 return err;
607}
608EXPORT_SYMBOL(bt_sock_wait_ready);
609
610#ifdef CONFIG_PROC_FS
611static void *bt_seq_start(struct seq_file *seq, loff_t *pos)
612 __acquires(seq->private->l->lock)
613{
614 struct bt_sock_list *l = PDE_DATA(file_inode(seq->file));
615
616 read_lock(&l->lock);
617 return seq_hlist_start_head(&l->head, *pos);
618}
619
620static void *bt_seq_next(struct seq_file *seq, void *v, loff_t *pos)
621{
622 struct bt_sock_list *l = PDE_DATA(file_inode(seq->file));
623
624 return seq_hlist_next(v, &l->head, pos);
625}
626
627static void bt_seq_stop(struct seq_file *seq, void *v)
628 __releases(seq->private->l->lock)
629{
630 struct bt_sock_list *l = PDE_DATA(file_inode(seq->file));
631
632 read_unlock(&l->lock);
633}
634
635static int bt_seq_show(struct seq_file *seq, void *v)
636{
637 struct bt_sock_list *l = PDE_DATA(file_inode(seq->file));
638
639 if (v == SEQ_START_TOKEN) {
640 seq_puts(seq ,"sk RefCnt Rmem Wmem User Inode Parent");
641
642 if (l->custom_seq_show) {
643 seq_putc(seq, ' ');
644 l->custom_seq_show(seq, v);
645 }
646
647 seq_putc(seq, '\n');
648 } else {
649 struct sock *sk = sk_entry(v);
650 struct bt_sock *bt = bt_sk(sk);
651
652 seq_printf(seq,
653 "%pK %-6d %-6u %-6u %-6u %-6lu %-6lu",
654 sk,
655 refcount_read(&sk->sk_refcnt),
656 sk_rmem_alloc_get(sk),
657 sk_wmem_alloc_get(sk),
658 from_kuid(seq_user_ns(seq), sock_i_uid(sk)),
659 sock_i_ino(sk),
660 bt->parent? sock_i_ino(bt->parent): 0LU);
661
662 if (l->custom_seq_show) {
663 seq_putc(seq, ' ');
664 l->custom_seq_show(seq, v);
665 }
666
667 seq_putc(seq, '\n');
668 }
669 return 0;
670}
671
672static const struct seq_operations bt_seq_ops = {
673 .start = bt_seq_start,
674 .next = bt_seq_next,
675 .stop = bt_seq_stop,
676 .show = bt_seq_show,
677};
678
679int bt_procfs_init(struct net *net, const char *name,
680 struct bt_sock_list *sk_list,
681 int (* seq_show)(struct seq_file *, void *))
682{
683 sk_list->custom_seq_show = seq_show;
684
685 if (!proc_create_seq_data(name, 0, net->proc_net, &bt_seq_ops, sk_list))
686 return -ENOMEM;
687 return 0;
688}
689
690void bt_procfs_cleanup(struct net *net, const char *name)
691{
692 remove_proc_entry(name, net->proc_net);
693}
694#else
695int bt_procfs_init(struct net *net, const char *name,
696 struct bt_sock_list *sk_list,
697 int (* seq_show)(struct seq_file *, void *))
698{
699 return 0;
700}
701
702void bt_procfs_cleanup(struct net *net, const char *name)
703{
704}
705#endif
706EXPORT_SYMBOL(bt_procfs_init);
707EXPORT_SYMBOL(bt_procfs_cleanup);
708
709static const struct net_proto_family bt_sock_family_ops = {
710 .owner = THIS_MODULE,
711 .family = PF_BLUETOOTH,
712 .create = bt_sock_create,
713};
714
715struct dentry *bt_debugfs;
716EXPORT_SYMBOL_GPL(bt_debugfs);
717
718#define VERSION __stringify(BT_SUBSYS_VERSION) "." \
719 __stringify(BT_SUBSYS_REVISION)
720
721static int __init bt_init(void)
722{
723 int err;
724
725 sock_skb_cb_check_size(sizeof(struct bt_skb_cb));
726
727 BT_INFO("Core ver %s", VERSION);
728
729 err = bt_selftest();
730 if (err < 0)
731 return err;
732
733 bt_debugfs = debugfs_create_dir("bluetooth", NULL);
734
735 bt_leds_init();
736
737 err = bt_sysfs_init();
738 if (err < 0)
739 return err;
740
741 err = sock_register(&bt_sock_family_ops);
742 if (err)
743 goto cleanup_sysfs;
744
745 BT_INFO("HCI device and connection manager initialized");
746
747 err = hci_sock_init();
748 if (err)
749 goto unregister_socket;
750
751 err = l2cap_init();
752 if (err)
753 goto cleanup_socket;
754
755 err = sco_init();
756 if (err)
757 goto cleanup_cap;
758
759 err = mgmt_init();
760 if (err)
761 goto cleanup_sco;
762
763 return 0;
764
765cleanup_sco:
766 sco_exit();
767cleanup_cap:
768 l2cap_exit();
769cleanup_socket:
770 hci_sock_cleanup();
771unregister_socket:
772 sock_unregister(PF_BLUETOOTH);
773cleanup_sysfs:
774 bt_sysfs_cleanup();
775 return err;
776}
777
778static void __exit bt_exit(void)
779{
780 mgmt_exit();
781
782 sco_exit();
783
784 l2cap_exit();
785
786 hci_sock_cleanup();
787
788 sock_unregister(PF_BLUETOOTH);
789
790 bt_sysfs_cleanup();
791
792 bt_leds_cleanup();
793
794 debugfs_remove_recursive(bt_debugfs);
795}
796
797subsys_initcall(bt_init);
798module_exit(bt_exit);
799
800MODULE_AUTHOR("Marcel Holtmann <marcel@holtmann.org>");
801MODULE_DESCRIPTION("Bluetooth Core ver " VERSION);
802MODULE_VERSION(VERSION);
803MODULE_LICENSE("GPL");
804MODULE_ALIAS_NETPROTO(PF_BLUETOOTH);