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)
42 static const struct net_proto_family *bt_proto[BT_MAX_PROTO];
43 static DEFINE_RWLOCK(bt_proto_lock);
44
45 static struct lock_class_key bt_lock_key[BT_MAX_PROTO];
46 static 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
58 static struct lock_class_key bt_slock_key[BT_MAX_PROTO];
59 static 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
bt_sock_reclassify_lock(struct sock * sk,int proto)71 void 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 }
80 EXPORT_SYMBOL(bt_sock_reclassify_lock);
81
bt_sock_register(int proto,const struct net_proto_family * ops)82 int 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 }
100 EXPORT_SYMBOL(bt_sock_register);
101
bt_sock_unregister(int proto)102 void 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 }
111 EXPORT_SYMBOL(bt_sock_unregister);
112
bt_sock_create(struct net * net,struct socket * sock,int proto,int kern)113 static 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
bt_sock_link(struct bt_sock_list * l,struct sock * sk)143 void 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 }
149 EXPORT_SYMBOL(bt_sock_link);
150
bt_sock_unlink(struct bt_sock_list * l,struct sock * sk)151 void 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 }
157 EXPORT_SYMBOL(bt_sock_unlink);
158
bt_accept_enqueue(struct sock * parent,struct sock * sk,bool bh)159 void 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 }
180 EXPORT_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 */
bt_accept_unlink(struct sock * sk)185 void 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 }
194 EXPORT_SYMBOL(bt_accept_unlink);
195
bt_accept_dequeue(struct sock * parent,struct socket * newsock)196 struct 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
203 restart:
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 }
251 EXPORT_SYMBOL(bt_accept_dequeue);
252
bt_sock_recvmsg(struct socket * sock,struct msghdr * msg,size_t len,int flags)253 int 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 }
302 EXPORT_SYMBOL(bt_sock_recvmsg);
303
bt_sock_data_wait(struct sock * sk,long timeo)304 static 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
bt_sock_stream_recvmsg(struct socket * sock,struct msghdr * msg,size_t size,int flags)333 int 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
432 out:
433 release_sock(sk);
434 return copied ? : err;
435 }
436 EXPORT_SYMBOL(bt_sock_stream_recvmsg);
437
bt_accept_poll(struct sock * parent)438 static 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
bt_sock_poll(struct file * file,struct socket * sock,poll_table * wait)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 }
493 EXPORT_SYMBOL(bt_sock_poll);
494
bt_sock_ioctl(struct socket * sock,unsigned int cmd,unsigned long arg)495 int 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 }
533 EXPORT_SYMBOL(bt_sock_ioctl);
534
535 /* This function expects the sk lock to be held when called */
bt_sock_wait_state(struct sock * sk,int state,unsigned long timeo)536 int 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 }
569 EXPORT_SYMBOL(bt_sock_wait_state);
570
571 /* This function expects the sk lock to be held when called */
bt_sock_wait_ready(struct sock * sk,unsigned int msg_flags)572 int 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 }
609 EXPORT_SYMBOL(bt_sock_wait_ready);
610
611 #ifdef CONFIG_PROC_FS
bt_seq_start(struct seq_file * seq,loff_t * pos)612 static 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
bt_seq_next(struct seq_file * seq,void * v,loff_t * pos)621 static 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
bt_seq_stop(struct seq_file * seq,void * v)628 static 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
bt_seq_show(struct seq_file * seq,void * v)636 static 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
673 static 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
bt_procfs_init(struct net * net,const char * name,struct bt_sock_list * sk_list,int (* seq_show)(struct seq_file *,void *))680 int 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
bt_procfs_cleanup(struct net * net,const char * name)691 void bt_procfs_cleanup(struct net *net, const char *name)
692 {
693 remove_proc_entry(name, net->proc_net);
694 }
695 #else
bt_procfs_init(struct net * net,const char * name,struct bt_sock_list * sk_list,int (* seq_show)(struct seq_file *,void *))696 int 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
bt_procfs_cleanup(struct net * net,const char * name)703 void bt_procfs_cleanup(struct net *net, const char *name)
704 {
705 }
706 #endif
707 EXPORT_SYMBOL(bt_procfs_init);
708 EXPORT_SYMBOL(bt_procfs_cleanup);
709
710 static const struct net_proto_family bt_sock_family_ops = {
711 .owner = THIS_MODULE,
712 .family = PF_BLUETOOTH,
713 .create = bt_sock_create,
714 };
715
716 struct dentry *bt_debugfs;
717 EXPORT_SYMBOL_GPL(bt_debugfs);
718
719 #define VERSION __stringify(BT_SUBSYS_VERSION) "." \
720 __stringify(BT_SUBSYS_REVISION)
721
bt_init(void)722 static 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
766 cleanup_sco:
767 sco_exit();
768 cleanup_cap:
769 l2cap_exit();
770 cleanup_socket:
771 hci_sock_cleanup();
772 unregister_socket:
773 sock_unregister(PF_BLUETOOTH);
774 cleanup_sysfs:
775 bt_sysfs_cleanup();
776 cleanup_led:
777 bt_leds_cleanup();
778 return err;
779 }
780
bt_exit(void)781 static 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
800 subsys_initcall(bt_init);
801 module_exit(bt_exit);
802
803 MODULE_AUTHOR("Marcel Holtmann <marcel@holtmann.org>");
804 MODULE_DESCRIPTION("Bluetooth Core ver " VERSION);
805 MODULE_VERSION(VERSION);
806 MODULE_LICENSE("GPL");
807 MODULE_ALIAS_NETPROTO(PF_BLUETOOTH);
808