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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
143struct sock *bt_sock_alloc(struct net *net, struct socket *sock,
144 struct proto *prot, int proto, gfp_t prio, int kern)
145{
146 struct sock *sk;
147
148 sk = sk_alloc(net, PF_BLUETOOTH, prio, prot, kern);
149 if (!sk)
150 return NULL;
151
152 sock_init_data(sock, sk);
153 INIT_LIST_HEAD(&bt_sk(sk)->accept_q);
154
155 sock_reset_flag(sk, SOCK_ZAPPED);
156
157 sk->sk_protocol = proto;
158 sk->sk_state = BT_OPEN;
159
160 /* Init peer information so it can be properly monitored */
161 if (!kern) {
162 spin_lock(&sk->sk_peer_lock);
163 sk->sk_peer_pid = get_pid(task_tgid(current));
164 sk->sk_peer_cred = get_current_cred();
165 spin_unlock(&sk->sk_peer_lock);
166 }
167
168 return sk;
169}
170EXPORT_SYMBOL(bt_sock_alloc);
171
172void bt_sock_link(struct bt_sock_list *l, struct sock *sk)
173{
174 write_lock(&l->lock);
175 sk_add_node(sk, &l->head);
176 write_unlock(&l->lock);
177}
178EXPORT_SYMBOL(bt_sock_link);
179
180void bt_sock_unlink(struct bt_sock_list *l, struct sock *sk)
181{
182 write_lock(&l->lock);
183 sk_del_node_init(sk);
184 write_unlock(&l->lock);
185}
186EXPORT_SYMBOL(bt_sock_unlink);
187
188void bt_accept_enqueue(struct sock *parent, struct sock *sk, bool bh)
189{
190 const struct cred *old_cred;
191 struct pid *old_pid;
192
193 BT_DBG("parent %p, sk %p", parent, sk);
194
195 sock_hold(sk);
196
197 if (bh)
198 bh_lock_sock_nested(sk);
199 else
200 lock_sock_nested(sk, SINGLE_DEPTH_NESTING);
201
202 list_add_tail(&bt_sk(sk)->accept_q, &bt_sk(parent)->accept_q);
203 bt_sk(sk)->parent = parent;
204
205 /* Copy credentials from parent since for incoming connections the
206 * socket is allocated by the kernel.
207 */
208 spin_lock(&sk->sk_peer_lock);
209 old_pid = sk->sk_peer_pid;
210 old_cred = sk->sk_peer_cred;
211 sk->sk_peer_pid = get_pid(parent->sk_peer_pid);
212 sk->sk_peer_cred = get_cred(parent->sk_peer_cred);
213 spin_unlock(&sk->sk_peer_lock);
214
215 put_pid(old_pid);
216 put_cred(old_cred);
217
218 if (bh)
219 bh_unlock_sock(sk);
220 else
221 release_sock(sk);
222
223 sk_acceptq_added(parent);
224}
225EXPORT_SYMBOL(bt_accept_enqueue);
226
227/* Calling function must hold the sk lock.
228 * bt_sk(sk)->parent must be non-NULL meaning sk is in the parent list.
229 */
230void bt_accept_unlink(struct sock *sk)
231{
232 BT_DBG("sk %p state %d", sk, sk->sk_state);
233
234 list_del_init(&bt_sk(sk)->accept_q);
235 sk_acceptq_removed(bt_sk(sk)->parent);
236 bt_sk(sk)->parent = NULL;
237 sock_put(sk);
238}
239EXPORT_SYMBOL(bt_accept_unlink);
240
241struct sock *bt_accept_dequeue(struct sock *parent, struct socket *newsock)
242{
243 struct bt_sock *s, *n;
244 struct sock *sk;
245
246 BT_DBG("parent %p", parent);
247
248restart:
249 list_for_each_entry_safe(s, n, &bt_sk(parent)->accept_q, accept_q) {
250 sk = (struct sock *)s;
251
252 /* Prevent early freeing of sk due to unlink and sock_kill */
253 sock_hold(sk);
254 lock_sock(sk);
255
256 /* Check sk has not already been unlinked via
257 * bt_accept_unlink() due to serialisation caused by sk locking
258 */
259 if (!bt_sk(sk)->parent) {
260 BT_DBG("sk %p, already unlinked", sk);
261 release_sock(sk);
262 sock_put(sk);
263
264 /* Restart the loop as sk is no longer in the list
265 * and also avoid a potential infinite loop because
266 * list_for_each_entry_safe() is not thread safe.
267 */
268 goto restart;
269 }
270
271 /* sk is safely in the parent list so reduce reference count */
272 sock_put(sk);
273
274 /* FIXME: Is this check still needed */
275 if (sk->sk_state == BT_CLOSED) {
276 bt_accept_unlink(sk);
277 release_sock(sk);
278 continue;
279 }
280
281 if (sk->sk_state == BT_CONNECTED || !newsock ||
282 test_bit(BT_SK_DEFER_SETUP, &bt_sk(parent)->flags)) {
283 bt_accept_unlink(sk);
284 if (newsock)
285 sock_graft(sk, newsock);
286
287 release_sock(sk);
288 return sk;
289 }
290
291 release_sock(sk);
292 }
293
294 return NULL;
295}
296EXPORT_SYMBOL(bt_accept_dequeue);
297
298int bt_sock_recvmsg(struct socket *sock, struct msghdr *msg, size_t len,
299 int flags)
300{
301 struct sock *sk = sock->sk;
302 struct sk_buff *skb;
303 size_t copied;
304 size_t skblen;
305 int err;
306
307 BT_DBG("sock %p sk %p len %zu", sock, sk, len);
308
309 if (flags & MSG_OOB)
310 return -EOPNOTSUPP;
311
312 lock_sock(sk);
313
314 skb = skb_recv_datagram(sk, flags, &err);
315 if (!skb) {
316 if (sk->sk_shutdown & RCV_SHUTDOWN)
317 err = 0;
318
319 release_sock(sk);
320 return err;
321 }
322
323 skblen = skb->len;
324 copied = skb->len;
325 if (len < copied) {
326 msg->msg_flags |= MSG_TRUNC;
327 copied = len;
328 }
329
330 skb_reset_transport_header(skb);
331 err = skb_copy_datagram_msg(skb, 0, msg, copied);
332 if (err == 0) {
333 sock_recv_cmsgs(msg, sk, skb);
334
335 if (msg->msg_name && bt_sk(sk)->skb_msg_name)
336 bt_sk(sk)->skb_msg_name(skb, msg->msg_name,
337 &msg->msg_namelen);
338
339 if (test_bit(BT_SK_PKT_STATUS, &bt_sk(sk)->flags)) {
340 u8 pkt_status = hci_skb_pkt_status(skb);
341
342 put_cmsg(msg, SOL_BLUETOOTH, BT_SCM_PKT_STATUS,
343 sizeof(pkt_status), &pkt_status);
344 }
345 }
346
347 skb_free_datagram(sk, skb);
348
349 release_sock(sk);
350
351 if (flags & MSG_TRUNC)
352 copied = skblen;
353
354 return err ? : copied;
355}
356EXPORT_SYMBOL(bt_sock_recvmsg);
357
358static long bt_sock_data_wait(struct sock *sk, long timeo)
359{
360 DECLARE_WAITQUEUE(wait, current);
361
362 add_wait_queue(sk_sleep(sk), &wait);
363 for (;;) {
364 set_current_state(TASK_INTERRUPTIBLE);
365
366 if (!skb_queue_empty(&sk->sk_receive_queue))
367 break;
368
369 if (sk->sk_err || (sk->sk_shutdown & RCV_SHUTDOWN))
370 break;
371
372 if (signal_pending(current) || !timeo)
373 break;
374
375 sk_set_bit(SOCKWQ_ASYNC_WAITDATA, sk);
376 release_sock(sk);
377 timeo = schedule_timeout(timeo);
378 lock_sock(sk);
379 sk_clear_bit(SOCKWQ_ASYNC_WAITDATA, sk);
380 }
381
382 __set_current_state(TASK_RUNNING);
383 remove_wait_queue(sk_sleep(sk), &wait);
384 return timeo;
385}
386
387int bt_sock_stream_recvmsg(struct socket *sock, struct msghdr *msg,
388 size_t size, int flags)
389{
390 struct sock *sk = sock->sk;
391 int err = 0;
392 size_t target, copied = 0;
393 long timeo;
394
395 if (flags & MSG_OOB)
396 return -EOPNOTSUPP;
397
398 BT_DBG("sk %p size %zu", sk, size);
399
400 lock_sock(sk);
401
402 target = sock_rcvlowat(sk, flags & MSG_WAITALL, size);
403 timeo = sock_rcvtimeo(sk, flags & MSG_DONTWAIT);
404
405 do {
406 struct sk_buff *skb;
407 int chunk;
408
409 skb = skb_dequeue(&sk->sk_receive_queue);
410 if (!skb) {
411 if (copied >= target)
412 break;
413
414 err = sock_error(sk);
415 if (err)
416 break;
417 if (sk->sk_shutdown & RCV_SHUTDOWN)
418 break;
419
420 err = -EAGAIN;
421 if (!timeo)
422 break;
423
424 timeo = bt_sock_data_wait(sk, timeo);
425
426 if (signal_pending(current)) {
427 err = sock_intr_errno(timeo);
428 goto out;
429 }
430 continue;
431 }
432
433 chunk = min_t(unsigned int, skb->len, size);
434 if (skb_copy_datagram_msg(skb, 0, msg, chunk)) {
435 skb_queue_head(&sk->sk_receive_queue, skb);
436 if (!copied)
437 copied = -EFAULT;
438 break;
439 }
440 copied += chunk;
441 size -= chunk;
442
443 sock_recv_cmsgs(msg, sk, skb);
444
445 if (!(flags & MSG_PEEK)) {
446 int skb_len = skb_headlen(skb);
447
448 if (chunk <= skb_len) {
449 __skb_pull(skb, chunk);
450 } else {
451 struct sk_buff *frag;
452
453 __skb_pull(skb, skb_len);
454 chunk -= skb_len;
455
456 skb_walk_frags(skb, frag) {
457 if (chunk <= frag->len) {
458 /* Pulling partial data */
459 skb->len -= chunk;
460 skb->data_len -= chunk;
461 __skb_pull(frag, chunk);
462 break;
463 } else if (frag->len) {
464 /* Pulling all frag data */
465 chunk -= frag->len;
466 skb->len -= frag->len;
467 skb->data_len -= frag->len;
468 __skb_pull(frag, frag->len);
469 }
470 }
471 }
472
473 if (skb->len) {
474 skb_queue_head(&sk->sk_receive_queue, skb);
475 break;
476 }
477 kfree_skb(skb);
478
479 } else {
480 /* put message back and return */
481 skb_queue_head(&sk->sk_receive_queue, skb);
482 break;
483 }
484 } while (size);
485
486out:
487 release_sock(sk);
488 return copied ? : err;
489}
490EXPORT_SYMBOL(bt_sock_stream_recvmsg);
491
492static inline __poll_t bt_accept_poll(struct sock *parent)
493{
494 struct bt_sock *s, *n;
495 struct sock *sk;
496
497 list_for_each_entry_safe(s, n, &bt_sk(parent)->accept_q, accept_q) {
498 sk = (struct sock *)s;
499 if (sk->sk_state == BT_CONNECTED ||
500 (test_bit(BT_SK_DEFER_SETUP, &bt_sk(parent)->flags) &&
501 sk->sk_state == BT_CONNECT2))
502 return EPOLLIN | EPOLLRDNORM;
503 }
504
505 return 0;
506}
507
508__poll_t bt_sock_poll(struct file *file, struct socket *sock,
509 poll_table *wait)
510{
511 struct sock *sk = sock->sk;
512 __poll_t mask = 0;
513
514 poll_wait(file, sk_sleep(sk), wait);
515
516 if (sk->sk_state == BT_LISTEN)
517 return bt_accept_poll(sk);
518
519 if (sk->sk_err || !skb_queue_empty_lockless(&sk->sk_error_queue))
520 mask |= EPOLLERR |
521 (sock_flag(sk, SOCK_SELECT_ERR_QUEUE) ? EPOLLPRI : 0);
522
523 if (sk->sk_shutdown & RCV_SHUTDOWN)
524 mask |= EPOLLRDHUP | EPOLLIN | EPOLLRDNORM;
525
526 if (sk->sk_shutdown == SHUTDOWN_MASK)
527 mask |= EPOLLHUP;
528
529 if (!skb_queue_empty_lockless(&sk->sk_receive_queue))
530 mask |= EPOLLIN | EPOLLRDNORM;
531
532 if (sk->sk_state == BT_CLOSED)
533 mask |= EPOLLHUP;
534
535 if (sk->sk_state == BT_CONNECT ||
536 sk->sk_state == BT_CONNECT2 ||
537 sk->sk_state == BT_CONFIG)
538 return mask;
539
540 if (!test_bit(BT_SK_SUSPEND, &bt_sk(sk)->flags) && sock_writeable(sk))
541 mask |= EPOLLOUT | EPOLLWRNORM | EPOLLWRBAND;
542 else
543 sk_set_bit(SOCKWQ_ASYNC_NOSPACE, sk);
544
545 return mask;
546}
547EXPORT_SYMBOL(bt_sock_poll);
548
549int bt_sock_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
550{
551 struct sock *sk = sock->sk;
552 struct sk_buff *skb;
553 long amount;
554 int err;
555
556 BT_DBG("sk %p cmd %x arg %lx", sk, cmd, arg);
557
558 switch (cmd) {
559 case TIOCOUTQ:
560 if (sk->sk_state == BT_LISTEN)
561 return -EINVAL;
562
563 amount = sk->sk_sndbuf - sk_wmem_alloc_get(sk);
564 if (amount < 0)
565 amount = 0;
566 err = put_user(amount, (int __user *)arg);
567 break;
568
569 case TIOCINQ:
570 if (sk->sk_state == BT_LISTEN)
571 return -EINVAL;
572
573 lock_sock(sk);
574 skb = skb_peek(&sk->sk_receive_queue);
575 amount = skb ? skb->len : 0;
576 release_sock(sk);
577 err = put_user(amount, (int __user *)arg);
578 break;
579
580 default:
581 err = -ENOIOCTLCMD;
582 break;
583 }
584
585 return err;
586}
587EXPORT_SYMBOL(bt_sock_ioctl);
588
589/* This function expects the sk lock to be held when called */
590int bt_sock_wait_state(struct sock *sk, int state, unsigned long timeo)
591{
592 DECLARE_WAITQUEUE(wait, current);
593 int err = 0;
594
595 BT_DBG("sk %p", sk);
596
597 add_wait_queue(sk_sleep(sk), &wait);
598 set_current_state(TASK_INTERRUPTIBLE);
599 while (sk->sk_state != state) {
600 if (!timeo) {
601 err = -EINPROGRESS;
602 break;
603 }
604
605 if (signal_pending(current)) {
606 err = sock_intr_errno(timeo);
607 break;
608 }
609
610 release_sock(sk);
611 timeo = schedule_timeout(timeo);
612 lock_sock(sk);
613 set_current_state(TASK_INTERRUPTIBLE);
614
615 err = sock_error(sk);
616 if (err)
617 break;
618 }
619 __set_current_state(TASK_RUNNING);
620 remove_wait_queue(sk_sleep(sk), &wait);
621 return err;
622}
623EXPORT_SYMBOL(bt_sock_wait_state);
624
625/* This function expects the sk lock to be held when called */
626int bt_sock_wait_ready(struct sock *sk, unsigned int msg_flags)
627{
628 DECLARE_WAITQUEUE(wait, current);
629 unsigned long timeo;
630 int err = 0;
631
632 BT_DBG("sk %p", sk);
633
634 timeo = sock_sndtimeo(sk, !!(msg_flags & MSG_DONTWAIT));
635
636 add_wait_queue(sk_sleep(sk), &wait);
637 set_current_state(TASK_INTERRUPTIBLE);
638 while (test_bit(BT_SK_SUSPEND, &bt_sk(sk)->flags)) {
639 if (!timeo) {
640 err = -EAGAIN;
641 break;
642 }
643
644 if (signal_pending(current)) {
645 err = sock_intr_errno(timeo);
646 break;
647 }
648
649 release_sock(sk);
650 timeo = schedule_timeout(timeo);
651 lock_sock(sk);
652 set_current_state(TASK_INTERRUPTIBLE);
653
654 err = sock_error(sk);
655 if (err)
656 break;
657 }
658 __set_current_state(TASK_RUNNING);
659 remove_wait_queue(sk_sleep(sk), &wait);
660
661 return err;
662}
663EXPORT_SYMBOL(bt_sock_wait_ready);
664
665#ifdef CONFIG_PROC_FS
666static void *bt_seq_start(struct seq_file *seq, loff_t *pos)
667 __acquires(seq->private->l->lock)
668{
669 struct bt_sock_list *l = pde_data(file_inode(seq->file));
670
671 read_lock(&l->lock);
672 return seq_hlist_start_head(&l->head, *pos);
673}
674
675static void *bt_seq_next(struct seq_file *seq, void *v, loff_t *pos)
676{
677 struct bt_sock_list *l = pde_data(file_inode(seq->file));
678
679 return seq_hlist_next(v, &l->head, pos);
680}
681
682static void bt_seq_stop(struct seq_file *seq, void *v)
683 __releases(seq->private->l->lock)
684{
685 struct bt_sock_list *l = pde_data(file_inode(seq->file));
686
687 read_unlock(&l->lock);
688}
689
690static int bt_seq_show(struct seq_file *seq, void *v)
691{
692 struct bt_sock_list *l = pde_data(file_inode(seq->file));
693
694 if (v == SEQ_START_TOKEN) {
695 seq_puts(seq, "sk RefCnt Rmem Wmem User Inode Parent");
696
697 if (l->custom_seq_show) {
698 seq_putc(seq, ' ');
699 l->custom_seq_show(seq, v);
700 }
701
702 seq_putc(seq, '\n');
703 } else {
704 struct sock *sk = sk_entry(v);
705 struct bt_sock *bt = bt_sk(sk);
706
707 seq_printf(seq,
708 "%pK %-6d %-6u %-6u %-6u %-6lu %-6lu",
709 sk,
710 refcount_read(&sk->sk_refcnt),
711 sk_rmem_alloc_get(sk),
712 sk_wmem_alloc_get(sk),
713 from_kuid(seq_user_ns(seq), sock_i_uid(sk)),
714 sock_i_ino(sk),
715 bt->parent ? sock_i_ino(bt->parent) : 0LU);
716
717 if (l->custom_seq_show) {
718 seq_putc(seq, ' ');
719 l->custom_seq_show(seq, v);
720 }
721
722 seq_putc(seq, '\n');
723 }
724 return 0;
725}
726
727static const struct seq_operations bt_seq_ops = {
728 .start = bt_seq_start,
729 .next = bt_seq_next,
730 .stop = bt_seq_stop,
731 .show = bt_seq_show,
732};
733
734int bt_procfs_init(struct net *net, const char *name,
735 struct bt_sock_list *sk_list,
736 int (*seq_show)(struct seq_file *, void *))
737{
738 sk_list->custom_seq_show = seq_show;
739
740 if (!proc_create_seq_data(name, 0, net->proc_net, &bt_seq_ops, sk_list))
741 return -ENOMEM;
742 return 0;
743}
744
745void bt_procfs_cleanup(struct net *net, const char *name)
746{
747 remove_proc_entry(name, net->proc_net);
748}
749#else
750int bt_procfs_init(struct net *net, const char *name,
751 struct bt_sock_list *sk_list,
752 int (*seq_show)(struct seq_file *, void *))
753{
754 return 0;
755}
756
757void bt_procfs_cleanup(struct net *net, const char *name)
758{
759}
760#endif
761EXPORT_SYMBOL(bt_procfs_init);
762EXPORT_SYMBOL(bt_procfs_cleanup);
763
764static const struct net_proto_family bt_sock_family_ops = {
765 .owner = THIS_MODULE,
766 .family = PF_BLUETOOTH,
767 .create = bt_sock_create,
768};
769
770struct dentry *bt_debugfs;
771EXPORT_SYMBOL_GPL(bt_debugfs);
772
773#define VERSION __stringify(BT_SUBSYS_VERSION) "." \
774 __stringify(BT_SUBSYS_REVISION)
775
776static int __init bt_init(void)
777{
778 int err;
779
780 sock_skb_cb_check_size(sizeof(struct bt_skb_cb));
781
782 BT_INFO("Core ver %s", VERSION);
783
784 err = bt_selftest();
785 if (err < 0)
786 return err;
787
788 bt_debugfs = debugfs_create_dir("bluetooth", NULL);
789
790 bt_leds_init();
791
792 err = bt_sysfs_init();
793 if (err < 0)
794 goto cleanup_led;
795
796 err = sock_register(&bt_sock_family_ops);
797 if (err)
798 goto cleanup_sysfs;
799
800 BT_INFO("HCI device and connection manager initialized");
801
802 err = hci_sock_init();
803 if (err)
804 goto unregister_socket;
805
806 err = l2cap_init();
807 if (err)
808 goto cleanup_socket;
809
810 err = sco_init();
811 if (err)
812 goto cleanup_cap;
813
814 err = mgmt_init();
815 if (err)
816 goto cleanup_sco;
817
818 return 0;
819
820cleanup_sco:
821 sco_exit();
822cleanup_cap:
823 l2cap_exit();
824cleanup_socket:
825 hci_sock_cleanup();
826unregister_socket:
827 sock_unregister(PF_BLUETOOTH);
828cleanup_sysfs:
829 bt_sysfs_cleanup();
830cleanup_led:
831 bt_leds_cleanup();
832 return err;
833}
834
835static void __exit bt_exit(void)
836{
837 mgmt_exit();
838
839 sco_exit();
840
841 l2cap_exit();
842
843 hci_sock_cleanup();
844
845 sock_unregister(PF_BLUETOOTH);
846
847 bt_sysfs_cleanup();
848
849 bt_leds_cleanup();
850
851 debugfs_remove_recursive(bt_debugfs);
852}
853
854subsys_initcall(bt_init);
855module_exit(bt_exit);
856
857MODULE_AUTHOR("Marcel Holtmann <marcel@holtmann.org>");
858MODULE_DESCRIPTION("Bluetooth Core ver " VERSION);
859MODULE_VERSION(VERSION);
860MODULE_LICENSE("GPL");
861MODULE_ALIAS_NETPROTO(PF_BLUETOOTH);