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
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 };
56
57 static struct lock_class_key bt_slock_key[BT_MAX_PROTO];
58 static 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
bt_sock_reclassify_lock(struct sock * sk,int proto)69 void 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 }
78 EXPORT_SYMBOL(bt_sock_reclassify_lock);
79
bt_sock_register(int proto,const struct net_proto_family * ops)80 int 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 }
98 EXPORT_SYMBOL(bt_sock_register);
99
bt_sock_unregister(int proto)100 void 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 }
109 EXPORT_SYMBOL(bt_sock_unregister);
110
bt_sock_create(struct net * net,struct socket * sock,int proto,int kern)111 static 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
bt_sock_link(struct bt_sock_list * l,struct sock * sk)141 void 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 }
147 EXPORT_SYMBOL(bt_sock_link);
148
bt_sock_unlink(struct bt_sock_list * l,struct sock * sk)149 void 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 }
155 EXPORT_SYMBOL(bt_sock_unlink);
156
bt_accept_enqueue(struct sock * parent,struct sock * sk,bool bh)157 void 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 parent->sk_ack_backlog++;
177 }
178 EXPORT_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 */
bt_accept_unlink(struct sock * sk)183 void 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 bt_sk(sk)->parent->sk_ack_backlog--;
189 bt_sk(sk)->parent = NULL;
190 sock_put(sk);
191 }
192 EXPORT_SYMBOL(bt_accept_unlink);
193
bt_accept_dequeue(struct sock * parent,struct socket * newsock)194 struct 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
201 restart:
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 }
249 EXPORT_SYMBOL(bt_accept_dequeue);
250
bt_sock_recvmsg(struct socket * sock,struct msghdr * msg,size_t len,int flags)251 int 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
291 skb_free_datagram(sk, skb);
292
293 if (flags & MSG_TRUNC)
294 copied = skblen;
295
296 return err ? : copied;
297 }
298 EXPORT_SYMBOL(bt_sock_recvmsg);
299
bt_sock_data_wait(struct sock * sk,long timeo)300 static long bt_sock_data_wait(struct sock *sk, long timeo)
301 {
302 DECLARE_WAITQUEUE(wait, current);
303
304 add_wait_queue(sk_sleep(sk), &wait);
305 for (;;) {
306 set_current_state(TASK_INTERRUPTIBLE);
307
308 if (!skb_queue_empty(&sk->sk_receive_queue))
309 break;
310
311 if (sk->sk_err || (sk->sk_shutdown & RCV_SHUTDOWN))
312 break;
313
314 if (signal_pending(current) || !timeo)
315 break;
316
317 sk_set_bit(SOCKWQ_ASYNC_WAITDATA, sk);
318 release_sock(sk);
319 timeo = schedule_timeout(timeo);
320 lock_sock(sk);
321 sk_clear_bit(SOCKWQ_ASYNC_WAITDATA, sk);
322 }
323
324 __set_current_state(TASK_RUNNING);
325 remove_wait_queue(sk_sleep(sk), &wait);
326 return timeo;
327 }
328
bt_sock_stream_recvmsg(struct socket * sock,struct msghdr * msg,size_t size,int flags)329 int bt_sock_stream_recvmsg(struct socket *sock, struct msghdr *msg,
330 size_t size, int flags)
331 {
332 struct sock *sk = sock->sk;
333 int err = 0;
334 size_t target, copied = 0;
335 long timeo;
336
337 if (flags & MSG_OOB)
338 return -EOPNOTSUPP;
339
340 BT_DBG("sk %p size %zu", sk, size);
341
342 lock_sock(sk);
343
344 target = sock_rcvlowat(sk, flags & MSG_WAITALL, size);
345 timeo = sock_rcvtimeo(sk, flags & MSG_DONTWAIT);
346
347 do {
348 struct sk_buff *skb;
349 int chunk;
350
351 skb = skb_dequeue(&sk->sk_receive_queue);
352 if (!skb) {
353 if (copied >= target)
354 break;
355
356 err = sock_error(sk);
357 if (err)
358 break;
359 if (sk->sk_shutdown & RCV_SHUTDOWN)
360 break;
361
362 err = -EAGAIN;
363 if (!timeo)
364 break;
365
366 timeo = bt_sock_data_wait(sk, timeo);
367
368 if (signal_pending(current)) {
369 err = sock_intr_errno(timeo);
370 goto out;
371 }
372 continue;
373 }
374
375 chunk = min_t(unsigned int, skb->len, size);
376 if (skb_copy_datagram_msg(skb, 0, msg, chunk)) {
377 skb_queue_head(&sk->sk_receive_queue, skb);
378 if (!copied)
379 copied = -EFAULT;
380 break;
381 }
382 copied += chunk;
383 size -= chunk;
384
385 sock_recv_ts_and_drops(msg, sk, skb);
386
387 if (!(flags & MSG_PEEK)) {
388 int skb_len = skb_headlen(skb);
389
390 if (chunk <= skb_len) {
391 __skb_pull(skb, chunk);
392 } else {
393 struct sk_buff *frag;
394
395 __skb_pull(skb, skb_len);
396 chunk -= skb_len;
397
398 skb_walk_frags(skb, frag) {
399 if (chunk <= frag->len) {
400 /* Pulling partial data */
401 skb->len -= chunk;
402 skb->data_len -= chunk;
403 __skb_pull(frag, chunk);
404 break;
405 } else if (frag->len) {
406 /* Pulling all frag data */
407 chunk -= frag->len;
408 skb->len -= frag->len;
409 skb->data_len -= frag->len;
410 __skb_pull(frag, frag->len);
411 }
412 }
413 }
414
415 if (skb->len) {
416 skb_queue_head(&sk->sk_receive_queue, skb);
417 break;
418 }
419 kfree_skb(skb);
420
421 } else {
422 /* put message back and return */
423 skb_queue_head(&sk->sk_receive_queue, skb);
424 break;
425 }
426 } while (size);
427
428 out:
429 release_sock(sk);
430 return copied ? : err;
431 }
432 EXPORT_SYMBOL(bt_sock_stream_recvmsg);
433
bt_accept_poll(struct sock * parent)434 static inline __poll_t bt_accept_poll(struct sock *parent)
435 {
436 struct bt_sock *s, *n;
437 struct sock *sk;
438
439 list_for_each_entry_safe(s, n, &bt_sk(parent)->accept_q, accept_q) {
440 sk = (struct sock *)s;
441 if (sk->sk_state == BT_CONNECTED ||
442 (test_bit(BT_SK_DEFER_SETUP, &bt_sk(parent)->flags) &&
443 sk->sk_state == BT_CONNECT2))
444 return EPOLLIN | EPOLLRDNORM;
445 }
446
447 return 0;
448 }
449
bt_sock_poll(struct file * file,struct socket * sock,poll_table * wait)450 __poll_t bt_sock_poll(struct file *file, struct socket *sock,
451 poll_table *wait)
452 {
453 struct sock *sk = sock->sk;
454 __poll_t mask = 0;
455
456 BT_DBG("sock %p, sk %p", sock, sk);
457
458 poll_wait(file, sk_sleep(sk), wait);
459
460 if (sk->sk_state == BT_LISTEN)
461 return bt_accept_poll(sk);
462
463 if (sk->sk_err || !skb_queue_empty_lockless(&sk->sk_error_queue))
464 mask |= EPOLLERR |
465 (sock_flag(sk, SOCK_SELECT_ERR_QUEUE) ? EPOLLPRI : 0);
466
467 if (sk->sk_shutdown & RCV_SHUTDOWN)
468 mask |= EPOLLRDHUP | EPOLLIN | EPOLLRDNORM;
469
470 if (sk->sk_shutdown == SHUTDOWN_MASK)
471 mask |= EPOLLHUP;
472
473 if (!skb_queue_empty_lockless(&sk->sk_receive_queue))
474 mask |= EPOLLIN | EPOLLRDNORM;
475
476 if (sk->sk_state == BT_CLOSED)
477 mask |= EPOLLHUP;
478
479 if (sk->sk_state == BT_CONNECT ||
480 sk->sk_state == BT_CONNECT2 ||
481 sk->sk_state == BT_CONFIG)
482 return mask;
483
484 if (!test_bit(BT_SK_SUSPEND, &bt_sk(sk)->flags) && sock_writeable(sk))
485 mask |= EPOLLOUT | EPOLLWRNORM | EPOLLWRBAND;
486 else
487 sk_set_bit(SOCKWQ_ASYNC_NOSPACE, sk);
488
489 return mask;
490 }
491 EXPORT_SYMBOL(bt_sock_poll);
492
bt_sock_ioctl(struct socket * sock,unsigned int cmd,unsigned long arg)493 int bt_sock_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
494 {
495 struct sock *sk = sock->sk;
496 struct sk_buff *skb;
497 long amount;
498 int err;
499
500 BT_DBG("sk %p cmd %x arg %lx", sk, cmd, arg);
501
502 switch (cmd) {
503 case TIOCOUTQ:
504 if (sk->sk_state == BT_LISTEN)
505 return -EINVAL;
506
507 amount = sk->sk_sndbuf - sk_wmem_alloc_get(sk);
508 if (amount < 0)
509 amount = 0;
510 err = put_user(amount, (int __user *) arg);
511 break;
512
513 case TIOCINQ:
514 if (sk->sk_state == BT_LISTEN)
515 return -EINVAL;
516
517 lock_sock(sk);
518 skb = skb_peek(&sk->sk_receive_queue);
519 amount = skb ? skb->len : 0;
520 release_sock(sk);
521 err = put_user(amount, (int __user *) arg);
522 break;
523
524 default:
525 err = -ENOIOCTLCMD;
526 break;
527 }
528
529 return err;
530 }
531 EXPORT_SYMBOL(bt_sock_ioctl);
532
533 /* This function expects the sk lock to be held when called */
bt_sock_wait_state(struct sock * sk,int state,unsigned long timeo)534 int bt_sock_wait_state(struct sock *sk, int state, unsigned long timeo)
535 {
536 DECLARE_WAITQUEUE(wait, current);
537 int err = 0;
538
539 BT_DBG("sk %p", sk);
540
541 add_wait_queue(sk_sleep(sk), &wait);
542 set_current_state(TASK_INTERRUPTIBLE);
543 while (sk->sk_state != state) {
544 if (!timeo) {
545 err = -EINPROGRESS;
546 break;
547 }
548
549 if (signal_pending(current)) {
550 err = sock_intr_errno(timeo);
551 break;
552 }
553
554 release_sock(sk);
555 timeo = schedule_timeout(timeo);
556 lock_sock(sk);
557 set_current_state(TASK_INTERRUPTIBLE);
558
559 err = sock_error(sk);
560 if (err)
561 break;
562 }
563 __set_current_state(TASK_RUNNING);
564 remove_wait_queue(sk_sleep(sk), &wait);
565 return err;
566 }
567 EXPORT_SYMBOL(bt_sock_wait_state);
568
569 /* This function expects the sk lock to be held when called */
bt_sock_wait_ready(struct sock * sk,unsigned long flags)570 int bt_sock_wait_ready(struct sock *sk, unsigned long flags)
571 {
572 DECLARE_WAITQUEUE(wait, current);
573 unsigned long timeo;
574 int err = 0;
575
576 BT_DBG("sk %p", sk);
577
578 timeo = sock_sndtimeo(sk, flags & O_NONBLOCK);
579
580 add_wait_queue(sk_sleep(sk), &wait);
581 set_current_state(TASK_INTERRUPTIBLE);
582 while (test_bit(BT_SK_SUSPEND, &bt_sk(sk)->flags)) {
583 if (!timeo) {
584 err = -EAGAIN;
585 break;
586 }
587
588 if (signal_pending(current)) {
589 err = sock_intr_errno(timeo);
590 break;
591 }
592
593 release_sock(sk);
594 timeo = schedule_timeout(timeo);
595 lock_sock(sk);
596 set_current_state(TASK_INTERRUPTIBLE);
597
598 err = sock_error(sk);
599 if (err)
600 break;
601 }
602 __set_current_state(TASK_RUNNING);
603 remove_wait_queue(sk_sleep(sk), &wait);
604
605 return err;
606 }
607 EXPORT_SYMBOL(bt_sock_wait_ready);
608
609 #ifdef CONFIG_PROC_FS
bt_seq_start(struct seq_file * seq,loff_t * pos)610 static void *bt_seq_start(struct seq_file *seq, loff_t *pos)
611 __acquires(seq->private->l->lock)
612 {
613 struct bt_sock_list *l = PDE_DATA(file_inode(seq->file));
614
615 read_lock(&l->lock);
616 return seq_hlist_start_head(&l->head, *pos);
617 }
618
bt_seq_next(struct seq_file * seq,void * v,loff_t * pos)619 static void *bt_seq_next(struct seq_file *seq, void *v, loff_t *pos)
620 {
621 struct bt_sock_list *l = PDE_DATA(file_inode(seq->file));
622
623 return seq_hlist_next(v, &l->head, pos);
624 }
625
bt_seq_stop(struct seq_file * seq,void * v)626 static void bt_seq_stop(struct seq_file *seq, void *v)
627 __releases(seq->private->l->lock)
628 {
629 struct bt_sock_list *l = PDE_DATA(file_inode(seq->file));
630
631 read_unlock(&l->lock);
632 }
633
bt_seq_show(struct seq_file * seq,void * v)634 static int bt_seq_show(struct seq_file *seq, void *v)
635 {
636 struct bt_sock_list *l = PDE_DATA(file_inode(seq->file));
637
638 if (v == SEQ_START_TOKEN) {
639 seq_puts(seq ,"sk RefCnt Rmem Wmem User Inode Parent");
640
641 if (l->custom_seq_show) {
642 seq_putc(seq, ' ');
643 l->custom_seq_show(seq, v);
644 }
645
646 seq_putc(seq, '\n');
647 } else {
648 struct sock *sk = sk_entry(v);
649 struct bt_sock *bt = bt_sk(sk);
650
651 seq_printf(seq,
652 "%pK %-6d %-6u %-6u %-6u %-6lu %-6lu",
653 sk,
654 refcount_read(&sk->sk_refcnt),
655 sk_rmem_alloc_get(sk),
656 sk_wmem_alloc_get(sk),
657 from_kuid(seq_user_ns(seq), sock_i_uid(sk)),
658 sock_i_ino(sk),
659 bt->parent? sock_i_ino(bt->parent): 0LU);
660
661 if (l->custom_seq_show) {
662 seq_putc(seq, ' ');
663 l->custom_seq_show(seq, v);
664 }
665
666 seq_putc(seq, '\n');
667 }
668 return 0;
669 }
670
671 static const struct seq_operations bt_seq_ops = {
672 .start = bt_seq_start,
673 .next = bt_seq_next,
674 .stop = bt_seq_stop,
675 .show = bt_seq_show,
676 };
677
bt_procfs_init(struct net * net,const char * name,struct bt_sock_list * sk_list,int (* seq_show)(struct seq_file *,void *))678 int bt_procfs_init(struct net *net, const char *name,
679 struct bt_sock_list *sk_list,
680 int (* seq_show)(struct seq_file *, void *))
681 {
682 sk_list->custom_seq_show = seq_show;
683
684 if (!proc_create_seq_data(name, 0, net->proc_net, &bt_seq_ops, sk_list))
685 return -ENOMEM;
686 return 0;
687 }
688
bt_procfs_cleanup(struct net * net,const char * name)689 void bt_procfs_cleanup(struct net *net, const char *name)
690 {
691 remove_proc_entry(name, net->proc_net);
692 }
693 #else
bt_procfs_init(struct net * net,const char * name,struct bt_sock_list * sk_list,int (* seq_show)(struct seq_file *,void *))694 int bt_procfs_init(struct net *net, const char *name,
695 struct bt_sock_list *sk_list,
696 int (* seq_show)(struct seq_file *, void *))
697 {
698 return 0;
699 }
700
bt_procfs_cleanup(struct net * net,const char * name)701 void bt_procfs_cleanup(struct net *net, const char *name)
702 {
703 }
704 #endif
705 EXPORT_SYMBOL(bt_procfs_init);
706 EXPORT_SYMBOL(bt_procfs_cleanup);
707
708 static const struct net_proto_family bt_sock_family_ops = {
709 .owner = THIS_MODULE,
710 .family = PF_BLUETOOTH,
711 .create = bt_sock_create,
712 };
713
714 struct dentry *bt_debugfs;
715 EXPORT_SYMBOL_GPL(bt_debugfs);
716
717 #define VERSION __stringify(BT_SUBSYS_VERSION) "." \
718 __stringify(BT_SUBSYS_REVISION)
719
bt_init(void)720 static int __init bt_init(void)
721 {
722 int err;
723
724 sock_skb_cb_check_size(sizeof(struct bt_skb_cb));
725
726 BT_INFO("Core ver %s", VERSION);
727
728 err = bt_selftest();
729 if (err < 0)
730 return err;
731
732 bt_debugfs = debugfs_create_dir("bluetooth", NULL);
733
734 bt_leds_init();
735
736 err = bt_sysfs_init();
737 if (err < 0)
738 return err;
739
740 err = sock_register(&bt_sock_family_ops);
741 if (err)
742 goto cleanup_sysfs;
743
744 BT_INFO("HCI device and connection manager initialized");
745
746 err = hci_sock_init();
747 if (err)
748 goto unregister_socket;
749
750 err = l2cap_init();
751 if (err)
752 goto cleanup_socket;
753
754 err = sco_init();
755 if (err)
756 goto cleanup_cap;
757
758 err = mgmt_init();
759 if (err)
760 goto cleanup_sco;
761
762 return 0;
763
764 cleanup_sco:
765 sco_exit();
766 cleanup_cap:
767 l2cap_exit();
768 cleanup_socket:
769 hci_sock_cleanup();
770 unregister_socket:
771 sock_unregister(PF_BLUETOOTH);
772 cleanup_sysfs:
773 bt_sysfs_cleanup();
774 return err;
775 }
776
bt_exit(void)777 static void __exit bt_exit(void)
778 {
779 mgmt_exit();
780
781 sco_exit();
782
783 l2cap_exit();
784
785 hci_sock_cleanup();
786
787 sock_unregister(PF_BLUETOOTH);
788
789 bt_sysfs_cleanup();
790
791 bt_leds_cleanup();
792
793 debugfs_remove_recursive(bt_debugfs);
794 }
795
796 subsys_initcall(bt_init);
797 module_exit(bt_exit);
798
799 MODULE_AUTHOR("Marcel Holtmann <marcel@holtmann.org>");
800 MODULE_DESCRIPTION("Bluetooth Core ver " VERSION);
801 MODULE_VERSION(VERSION);
802 MODULE_LICENSE("GPL");
803 MODULE_ALIAS_NETPROTO(PF_BLUETOOTH);
804