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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 (BTPROTO_LAST + 1)
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 "sk_lock-AF_BLUETOOTH-BTPROTO_ISO",
56};
57
58static struct lock_class_key bt_slock_key[BT_MAX_PROTO];
59static const char *const bt_slock_key_strings[BT_MAX_PROTO] = {
60 "slock-AF_BLUETOOTH-BTPROTO_L2CAP",
61 "slock-AF_BLUETOOTH-BTPROTO_HCI",
62 "slock-AF_BLUETOOTH-BTPROTO_SCO",
63 "slock-AF_BLUETOOTH-BTPROTO_RFCOMM",
64 "slock-AF_BLUETOOTH-BTPROTO_BNEP",
65 "slock-AF_BLUETOOTH-BTPROTO_CMTP",
66 "slock-AF_BLUETOOTH-BTPROTO_HIDP",
67 "slock-AF_BLUETOOTH-BTPROTO_AVDTP",
68 "slock-AF_BLUETOOTH-BTPROTO_ISO",
69};
70
71void bt_sock_reclassify_lock(struct sock *sk, int proto)
72{
73 BUG_ON(!sk);
74 BUG_ON(!sock_allow_reclassification(sk));
75
76 sock_lock_init_class_and_name(sk,
77 bt_slock_key_strings[proto], &bt_slock_key[proto],
78 bt_key_strings[proto], &bt_lock_key[proto]);
79}
80EXPORT_SYMBOL(bt_sock_reclassify_lock);
81
82int bt_sock_register(int proto, const struct net_proto_family *ops)
83{
84 int err = 0;
85
86 if (proto < 0 || proto >= BT_MAX_PROTO)
87 return -EINVAL;
88
89 write_lock(&bt_proto_lock);
90
91 if (bt_proto[proto])
92 err = -EEXIST;
93 else
94 bt_proto[proto] = ops;
95
96 write_unlock(&bt_proto_lock);
97
98 return err;
99}
100EXPORT_SYMBOL(bt_sock_register);
101
102void bt_sock_unregister(int proto)
103{
104 if (proto < 0 || proto >= BT_MAX_PROTO)
105 return;
106
107 write_lock(&bt_proto_lock);
108 bt_proto[proto] = NULL;
109 write_unlock(&bt_proto_lock);
110}
111EXPORT_SYMBOL(bt_sock_unregister);
112
113static int bt_sock_create(struct net *net, struct socket *sock, int proto,
114 int kern)
115{
116 int err;
117
118 if (net != &init_net)
119 return -EAFNOSUPPORT;
120
121 if (proto < 0 || proto >= BT_MAX_PROTO)
122 return -EINVAL;
123
124 if (!bt_proto[proto])
125 request_module("bt-proto-%d", proto);
126
127 err = -EPROTONOSUPPORT;
128
129 read_lock(&bt_proto_lock);
130
131 if (bt_proto[proto] && try_module_get(bt_proto[proto]->owner)) {
132 err = bt_proto[proto]->create(net, sock, proto, kern);
133 if (!err)
134 bt_sock_reclassify_lock(sock->sk, proto);
135 module_put(bt_proto[proto]->owner);
136 }
137
138 read_unlock(&bt_proto_lock);
139
140 return err;
141}
142
143void bt_sock_link(struct bt_sock_list *l, struct sock *sk)
144{
145 write_lock(&l->lock);
146 sk_add_node(sk, &l->head);
147 write_unlock(&l->lock);
148}
149EXPORT_SYMBOL(bt_sock_link);
150
151void bt_sock_unlink(struct bt_sock_list *l, struct sock *sk)
152{
153 write_lock(&l->lock);
154 sk_del_node_init(sk);
155 write_unlock(&l->lock);
156}
157EXPORT_SYMBOL(bt_sock_unlink);
158
159void bt_accept_enqueue(struct sock *parent, struct sock *sk, bool bh)
160{
161 BT_DBG("parent %p, sk %p", parent, sk);
162
163 sock_hold(sk);
164
165 if (bh)
166 bh_lock_sock_nested(sk);
167 else
168 lock_sock_nested(sk, SINGLE_DEPTH_NESTING);
169
170 list_add_tail(&bt_sk(sk)->accept_q, &bt_sk(parent)->accept_q);
171 bt_sk(sk)->parent = parent;
172
173 if (bh)
174 bh_unlock_sock(sk);
175 else
176 release_sock(sk);
177
178 sk_acceptq_added(parent);
179}
180EXPORT_SYMBOL(bt_accept_enqueue);
181
182/* Calling function must hold the sk lock.
183 * bt_sk(sk)->parent must be non-NULL meaning sk is in the parent list.
184 */
185void bt_accept_unlink(struct sock *sk)
186{
187 BT_DBG("sk %p state %d", sk, sk->sk_state);
188
189 list_del_init(&bt_sk(sk)->accept_q);
190 sk_acceptq_removed(bt_sk(sk)->parent);
191 bt_sk(sk)->parent = NULL;
192 sock_put(sk);
193}
194EXPORT_SYMBOL(bt_accept_unlink);
195
196struct sock *bt_accept_dequeue(struct sock *parent, struct socket *newsock)
197{
198 struct bt_sock *s, *n;
199 struct sock *sk;
200
201 BT_DBG("parent %p", parent);
202
203restart:
204 list_for_each_entry_safe(s, n, &bt_sk(parent)->accept_q, accept_q) {
205 sk = (struct sock *)s;
206
207 /* Prevent early freeing of sk due to unlink and sock_kill */
208 sock_hold(sk);
209 lock_sock(sk);
210
211 /* Check sk has not already been unlinked via
212 * bt_accept_unlink() due to serialisation caused by sk locking
213 */
214 if (!bt_sk(sk)->parent) {
215 BT_DBG("sk %p, already unlinked", sk);
216 release_sock(sk);
217 sock_put(sk);
218
219 /* Restart the loop as sk is no longer in the list
220 * and also avoid a potential infinite loop because
221 * list_for_each_entry_safe() is not thread safe.
222 */
223 goto restart;
224 }
225
226 /* sk is safely in the parent list so reduce reference count */
227 sock_put(sk);
228
229 /* FIXME: Is this check still needed */
230 if (sk->sk_state == BT_CLOSED) {
231 bt_accept_unlink(sk);
232 release_sock(sk);
233 continue;
234 }
235
236 if (sk->sk_state == BT_CONNECTED || !newsock ||
237 test_bit(BT_SK_DEFER_SETUP, &bt_sk(parent)->flags)) {
238 bt_accept_unlink(sk);
239 if (newsock)
240 sock_graft(sk, newsock);
241
242 release_sock(sk);
243 return sk;
244 }
245
246 release_sock(sk);
247 }
248
249 return NULL;
250}
251EXPORT_SYMBOL(bt_accept_dequeue);
252
253int bt_sock_recvmsg(struct socket *sock, struct msghdr *msg, size_t len,
254 int flags)
255{
256 struct sock *sk = sock->sk;
257 struct sk_buff *skb;
258 size_t copied;
259 size_t skblen;
260 int err;
261
262 BT_DBG("sock %p sk %p len %zu", sock, sk, len);
263
264 if (flags & MSG_OOB)
265 return -EOPNOTSUPP;
266
267 skb = skb_recv_datagram(sk, flags, &err);
268 if (!skb) {
269 if (sk->sk_shutdown & RCV_SHUTDOWN)
270 return 0;
271
272 return err;
273 }
274
275 skblen = skb->len;
276 copied = skb->len;
277 if (len < copied) {
278 msg->msg_flags |= MSG_TRUNC;
279 copied = len;
280 }
281
282 skb_reset_transport_header(skb);
283 err = skb_copy_datagram_msg(skb, 0, msg, copied);
284 if (err == 0) {
285 sock_recv_cmsgs(msg, sk, skb);
286
287 if (msg->msg_name && bt_sk(sk)->skb_msg_name)
288 bt_sk(sk)->skb_msg_name(skb, msg->msg_name,
289 &msg->msg_namelen);
290
291 if (bt_sk(sk)->skb_put_cmsg)
292 bt_sk(sk)->skb_put_cmsg(skb, msg, sk);
293 }
294
295 skb_free_datagram(sk, skb);
296
297 if (flags & MSG_TRUNC)
298 copied = skblen;
299
300 return err ? : copied;
301}
302EXPORT_SYMBOL(bt_sock_recvmsg);
303
304static long bt_sock_data_wait(struct sock *sk, long timeo)
305{
306 DECLARE_WAITQUEUE(wait, current);
307
308 add_wait_queue(sk_sleep(sk), &wait);
309 for (;;) {
310 set_current_state(TASK_INTERRUPTIBLE);
311
312 if (!skb_queue_empty(&sk->sk_receive_queue))
313 break;
314
315 if (sk->sk_err || (sk->sk_shutdown & RCV_SHUTDOWN))
316 break;
317
318 if (signal_pending(current) || !timeo)
319 break;
320
321 sk_set_bit(SOCKWQ_ASYNC_WAITDATA, sk);
322 release_sock(sk);
323 timeo = schedule_timeout(timeo);
324 lock_sock(sk);
325 sk_clear_bit(SOCKWQ_ASYNC_WAITDATA, sk);
326 }
327
328 __set_current_state(TASK_RUNNING);
329 remove_wait_queue(sk_sleep(sk), &wait);
330 return timeo;
331}
332
333int bt_sock_stream_recvmsg(struct socket *sock, struct msghdr *msg,
334 size_t size, int flags)
335{
336 struct sock *sk = sock->sk;
337 int err = 0;
338 size_t target, copied = 0;
339 long timeo;
340
341 if (flags & MSG_OOB)
342 return -EOPNOTSUPP;
343
344 BT_DBG("sk %p size %zu", sk, size);
345
346 lock_sock(sk);
347
348 target = sock_rcvlowat(sk, flags & MSG_WAITALL, size);
349 timeo = sock_rcvtimeo(sk, flags & MSG_DONTWAIT);
350
351 do {
352 struct sk_buff *skb;
353 int chunk;
354
355 skb = skb_dequeue(&sk->sk_receive_queue);
356 if (!skb) {
357 if (copied >= target)
358 break;
359
360 err = sock_error(sk);
361 if (err)
362 break;
363 if (sk->sk_shutdown & RCV_SHUTDOWN)
364 break;
365
366 err = -EAGAIN;
367 if (!timeo)
368 break;
369
370 timeo = bt_sock_data_wait(sk, timeo);
371
372 if (signal_pending(current)) {
373 err = sock_intr_errno(timeo);
374 goto out;
375 }
376 continue;
377 }
378
379 chunk = min_t(unsigned int, skb->len, size);
380 if (skb_copy_datagram_msg(skb, 0, msg, chunk)) {
381 skb_queue_head(&sk->sk_receive_queue, skb);
382 if (!copied)
383 copied = -EFAULT;
384 break;
385 }
386 copied += chunk;
387 size -= chunk;
388
389 sock_recv_cmsgs(msg, sk, skb);
390
391 if (!(flags & MSG_PEEK)) {
392 int skb_len = skb_headlen(skb);
393
394 if (chunk <= skb_len) {
395 __skb_pull(skb, chunk);
396 } else {
397 struct sk_buff *frag;
398
399 __skb_pull(skb, skb_len);
400 chunk -= skb_len;
401
402 skb_walk_frags(skb, frag) {
403 if (chunk <= frag->len) {
404 /* Pulling partial data */
405 skb->len -= chunk;
406 skb->data_len -= chunk;
407 __skb_pull(frag, chunk);
408 break;
409 } else if (frag->len) {
410 /* Pulling all frag data */
411 chunk -= frag->len;
412 skb->len -= frag->len;
413 skb->data_len -= frag->len;
414 __skb_pull(frag, frag->len);
415 }
416 }
417 }
418
419 if (skb->len) {
420 skb_queue_head(&sk->sk_receive_queue, skb);
421 break;
422 }
423 kfree_skb(skb);
424
425 } else {
426 /* put message back and return */
427 skb_queue_head(&sk->sk_receive_queue, skb);
428 break;
429 }
430 } while (size);
431
432out:
433 release_sock(sk);
434 return copied ? : err;
435}
436EXPORT_SYMBOL(bt_sock_stream_recvmsg);
437
438static inline __poll_t bt_accept_poll(struct sock *parent)
439{
440 struct bt_sock *s, *n;
441 struct sock *sk;
442
443 list_for_each_entry_safe(s, n, &bt_sk(parent)->accept_q, accept_q) {
444 sk = (struct sock *)s;
445 if (sk->sk_state == BT_CONNECTED ||
446 (test_bit(BT_SK_DEFER_SETUP, &bt_sk(parent)->flags) &&
447 sk->sk_state == BT_CONNECT2))
448 return EPOLLIN | EPOLLRDNORM;
449 }
450
451 return 0;
452}
453
454__poll_t bt_sock_poll(struct file *file, struct socket *sock,
455 poll_table *wait)
456{
457 struct sock *sk = sock->sk;
458 __poll_t mask = 0;
459
460 poll_wait(file, sk_sleep(sk), wait);
461
462 if (sk->sk_state == BT_LISTEN)
463 return bt_accept_poll(sk);
464
465 if (sk->sk_err || !skb_queue_empty_lockless(&sk->sk_error_queue))
466 mask |= EPOLLERR |
467 (sock_flag(sk, SOCK_SELECT_ERR_QUEUE) ? EPOLLPRI : 0);
468
469 if (sk->sk_shutdown & RCV_SHUTDOWN)
470 mask |= EPOLLRDHUP | EPOLLIN | EPOLLRDNORM;
471
472 if (sk->sk_shutdown == SHUTDOWN_MASK)
473 mask |= EPOLLHUP;
474
475 if (!skb_queue_empty_lockless(&sk->sk_receive_queue))
476 mask |= EPOLLIN | EPOLLRDNORM;
477
478 if (sk->sk_state == BT_CLOSED)
479 mask |= EPOLLHUP;
480
481 if (sk->sk_state == BT_CONNECT ||
482 sk->sk_state == BT_CONNECT2 ||
483 sk->sk_state == BT_CONFIG)
484 return mask;
485
486 if (!test_bit(BT_SK_SUSPEND, &bt_sk(sk)->flags) && sock_writeable(sk))
487 mask |= EPOLLOUT | EPOLLWRNORM | EPOLLWRBAND;
488 else
489 sk_set_bit(SOCKWQ_ASYNC_NOSPACE, sk);
490
491 return mask;
492}
493EXPORT_SYMBOL(bt_sock_poll);
494
495int bt_sock_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
496{
497 struct sock *sk = sock->sk;
498 struct sk_buff *skb;
499 long amount;
500 int err;
501
502 BT_DBG("sk %p cmd %x arg %lx", sk, cmd, arg);
503
504 switch (cmd) {
505 case TIOCOUTQ:
506 if (sk->sk_state == BT_LISTEN)
507 return -EINVAL;
508
509 amount = sk->sk_sndbuf - sk_wmem_alloc_get(sk);
510 if (amount < 0)
511 amount = 0;
512 err = put_user(amount, (int __user *)arg);
513 break;
514
515 case TIOCINQ:
516 if (sk->sk_state == BT_LISTEN)
517 return -EINVAL;
518
519 lock_sock(sk);
520 skb = skb_peek(&sk->sk_receive_queue);
521 amount = skb ? skb->len : 0;
522 release_sock(sk);
523 err = put_user(amount, (int __user *)arg);
524 break;
525
526 default:
527 err = -ENOIOCTLCMD;
528 break;
529 }
530
531 return err;
532}
533EXPORT_SYMBOL(bt_sock_ioctl);
534
535/* This function expects the sk lock to be held when called */
536int bt_sock_wait_state(struct sock *sk, int state, unsigned long timeo)
537{
538 DECLARE_WAITQUEUE(wait, current);
539 int err = 0;
540
541 BT_DBG("sk %p", sk);
542
543 add_wait_queue(sk_sleep(sk), &wait);
544 set_current_state(TASK_INTERRUPTIBLE);
545 while (sk->sk_state != state) {
546 if (!timeo) {
547 err = -EINPROGRESS;
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 return err;
568}
569EXPORT_SYMBOL(bt_sock_wait_state);
570
571/* This function expects the sk lock to be held when called */
572int bt_sock_wait_ready(struct sock *sk, unsigned int msg_flags)
573{
574 DECLARE_WAITQUEUE(wait, current);
575 unsigned long timeo;
576 int err = 0;
577
578 BT_DBG("sk %p", sk);
579
580 timeo = sock_sndtimeo(sk, !!(msg_flags & MSG_DONTWAIT));
581
582 add_wait_queue(sk_sleep(sk), &wait);
583 set_current_state(TASK_INTERRUPTIBLE);
584 while (test_bit(BT_SK_SUSPEND, &bt_sk(sk)->flags)) {
585 if (!timeo) {
586 err = -EAGAIN;
587 break;
588 }
589
590 if (signal_pending(current)) {
591 err = sock_intr_errno(timeo);
592 break;
593 }
594
595 release_sock(sk);
596 timeo = schedule_timeout(timeo);
597 lock_sock(sk);
598 set_current_state(TASK_INTERRUPTIBLE);
599
600 err = sock_error(sk);
601 if (err)
602 break;
603 }
604 __set_current_state(TASK_RUNNING);
605 remove_wait_queue(sk_sleep(sk), &wait);
606
607 return err;
608}
609EXPORT_SYMBOL(bt_sock_wait_ready);
610
611#ifdef CONFIG_PROC_FS
612static void *bt_seq_start(struct seq_file *seq, loff_t *pos)
613 __acquires(seq->private->l->lock)
614{
615 struct bt_sock_list *l = pde_data(file_inode(seq->file));
616
617 read_lock(&l->lock);
618 return seq_hlist_start_head(&l->head, *pos);
619}
620
621static void *bt_seq_next(struct seq_file *seq, void *v, loff_t *pos)
622{
623 struct bt_sock_list *l = pde_data(file_inode(seq->file));
624
625 return seq_hlist_next(v, &l->head, pos);
626}
627
628static void bt_seq_stop(struct seq_file *seq, void *v)
629 __releases(seq->private->l->lock)
630{
631 struct bt_sock_list *l = pde_data(file_inode(seq->file));
632
633 read_unlock(&l->lock);
634}
635
636static int bt_seq_show(struct seq_file *seq, void *v)
637{
638 struct bt_sock_list *l = pde_data(file_inode(seq->file));
639
640 if (v == SEQ_START_TOKEN) {
641 seq_puts(seq, "sk RefCnt Rmem Wmem User Inode Parent");
642
643 if (l->custom_seq_show) {
644 seq_putc(seq, ' ');
645 l->custom_seq_show(seq, v);
646 }
647
648 seq_putc(seq, '\n');
649 } else {
650 struct sock *sk = sk_entry(v);
651 struct bt_sock *bt = bt_sk(sk);
652
653 seq_printf(seq,
654 "%pK %-6d %-6u %-6u %-6u %-6lu %-6lu",
655 sk,
656 refcount_read(&sk->sk_refcnt),
657 sk_rmem_alloc_get(sk),
658 sk_wmem_alloc_get(sk),
659 from_kuid(seq_user_ns(seq), sock_i_uid(sk)),
660 sock_i_ino(sk),
661 bt->parent ? sock_i_ino(bt->parent) : 0LU);
662
663 if (l->custom_seq_show) {
664 seq_putc(seq, ' ');
665 l->custom_seq_show(seq, v);
666 }
667
668 seq_putc(seq, '\n');
669 }
670 return 0;
671}
672
673static const struct seq_operations bt_seq_ops = {
674 .start = bt_seq_start,
675 .next = bt_seq_next,
676 .stop = bt_seq_stop,
677 .show = bt_seq_show,
678};
679
680int bt_procfs_init(struct net *net, const char *name,
681 struct bt_sock_list *sk_list,
682 int (*seq_show)(struct seq_file *, void *))
683{
684 sk_list->custom_seq_show = seq_show;
685
686 if (!proc_create_seq_data(name, 0, net->proc_net, &bt_seq_ops, sk_list))
687 return -ENOMEM;
688 return 0;
689}
690
691void bt_procfs_cleanup(struct net *net, const char *name)
692{
693 remove_proc_entry(name, net->proc_net);
694}
695#else
696int bt_procfs_init(struct net *net, const char *name,
697 struct bt_sock_list *sk_list,
698 int (*seq_show)(struct seq_file *, void *))
699{
700 return 0;
701}
702
703void bt_procfs_cleanup(struct net *net, const char *name)
704{
705}
706#endif
707EXPORT_SYMBOL(bt_procfs_init);
708EXPORT_SYMBOL(bt_procfs_cleanup);
709
710static const struct net_proto_family bt_sock_family_ops = {
711 .owner = THIS_MODULE,
712 .family = PF_BLUETOOTH,
713 .create = bt_sock_create,
714};
715
716struct dentry *bt_debugfs;
717EXPORT_SYMBOL_GPL(bt_debugfs);
718
719#define VERSION __stringify(BT_SUBSYS_VERSION) "." \
720 __stringify(BT_SUBSYS_REVISION)
721
722static int __init bt_init(void)
723{
724 int err;
725
726 sock_skb_cb_check_size(sizeof(struct bt_skb_cb));
727
728 BT_INFO("Core ver %s", VERSION);
729
730 err = bt_selftest();
731 if (err < 0)
732 return err;
733
734 bt_debugfs = debugfs_create_dir("bluetooth", NULL);
735
736 bt_leds_init();
737
738 err = bt_sysfs_init();
739 if (err < 0)
740 goto cleanup_led;
741
742 err = sock_register(&bt_sock_family_ops);
743 if (err)
744 goto cleanup_sysfs;
745
746 BT_INFO("HCI device and connection manager initialized");
747
748 err = hci_sock_init();
749 if (err)
750 goto unregister_socket;
751
752 err = l2cap_init();
753 if (err)
754 goto cleanup_socket;
755
756 err = sco_init();
757 if (err)
758 goto cleanup_cap;
759
760 err = mgmt_init();
761 if (err)
762 goto cleanup_sco;
763
764 return 0;
765
766cleanup_sco:
767 sco_exit();
768cleanup_cap:
769 l2cap_exit();
770cleanup_socket:
771 hci_sock_cleanup();
772unregister_socket:
773 sock_unregister(PF_BLUETOOTH);
774cleanup_sysfs:
775 bt_sysfs_cleanup();
776cleanup_led:
777 bt_leds_cleanup();
778 return err;
779}
780
781static void __exit bt_exit(void)
782{
783 mgmt_exit();
784
785 sco_exit();
786
787 l2cap_exit();
788
789 hci_sock_cleanup();
790
791 sock_unregister(PF_BLUETOOTH);
792
793 bt_sysfs_cleanup();
794
795 bt_leds_cleanup();
796
797 debugfs_remove_recursive(bt_debugfs);
798}
799
800subsys_initcall(bt_init);
801module_exit(bt_exit);
802
803MODULE_AUTHOR("Marcel Holtmann <marcel@holtmann.org>");
804MODULE_DESCRIPTION("Bluetooth Core ver " VERSION);
805MODULE_VERSION(VERSION);
806MODULE_LICENSE("GPL");
807MODULE_ALIAS_NETPROTO(PF_BLUETOOTH);