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 #define VERSION "2.20" 37 38 /* Bluetooth sockets */ 39 #define BT_MAX_PROTO 8 40 static const struct net_proto_family *bt_proto[BT_MAX_PROTO]; 41 static DEFINE_RWLOCK(bt_proto_lock); 42 43 static struct lock_class_key bt_lock_key[BT_MAX_PROTO]; 44 static const char *const bt_key_strings[BT_MAX_PROTO] = { 45 "sk_lock-AF_BLUETOOTH-BTPROTO_L2CAP", 46 "sk_lock-AF_BLUETOOTH-BTPROTO_HCI", 47 "sk_lock-AF_BLUETOOTH-BTPROTO_SCO", 48 "sk_lock-AF_BLUETOOTH-BTPROTO_RFCOMM", 49 "sk_lock-AF_BLUETOOTH-BTPROTO_BNEP", 50 "sk_lock-AF_BLUETOOTH-BTPROTO_CMTP", 51 "sk_lock-AF_BLUETOOTH-BTPROTO_HIDP", 52 "sk_lock-AF_BLUETOOTH-BTPROTO_AVDTP", 53 }; 54 55 static struct lock_class_key bt_slock_key[BT_MAX_PROTO]; 56 static const char *const bt_slock_key_strings[BT_MAX_PROTO] = { 57 "slock-AF_BLUETOOTH-BTPROTO_L2CAP", 58 "slock-AF_BLUETOOTH-BTPROTO_HCI", 59 "slock-AF_BLUETOOTH-BTPROTO_SCO", 60 "slock-AF_BLUETOOTH-BTPROTO_RFCOMM", 61 "slock-AF_BLUETOOTH-BTPROTO_BNEP", 62 "slock-AF_BLUETOOTH-BTPROTO_CMTP", 63 "slock-AF_BLUETOOTH-BTPROTO_HIDP", 64 "slock-AF_BLUETOOTH-BTPROTO_AVDTP", 65 }; 66 67 void bt_sock_reclassify_lock(struct sock *sk, int proto) 68 { 69 BUG_ON(!sk); 70 BUG_ON(sock_owned_by_user(sk)); 71 72 sock_lock_init_class_and_name(sk, 73 bt_slock_key_strings[proto], &bt_slock_key[proto], 74 bt_key_strings[proto], &bt_lock_key[proto]); 75 } 76 EXPORT_SYMBOL(bt_sock_reclassify_lock); 77 78 int bt_sock_register(int proto, const struct net_proto_family *ops) 79 { 80 int err = 0; 81 82 if (proto < 0 || proto >= BT_MAX_PROTO) 83 return -EINVAL; 84 85 write_lock(&bt_proto_lock); 86 87 if (bt_proto[proto]) 88 err = -EEXIST; 89 else 90 bt_proto[proto] = ops; 91 92 write_unlock(&bt_proto_lock); 93 94 return err; 95 } 96 EXPORT_SYMBOL(bt_sock_register); 97 98 void bt_sock_unregister(int proto) 99 { 100 if (proto < 0 || proto >= BT_MAX_PROTO) 101 return; 102 103 write_lock(&bt_proto_lock); 104 bt_proto[proto] = NULL; 105 write_unlock(&bt_proto_lock); 106 } 107 EXPORT_SYMBOL(bt_sock_unregister); 108 109 static int bt_sock_create(struct net *net, struct socket *sock, int proto, 110 int kern) 111 { 112 int err; 113 114 if (net != &init_net) 115 return -EAFNOSUPPORT; 116 117 if (proto < 0 || proto >= BT_MAX_PROTO) 118 return -EINVAL; 119 120 if (!bt_proto[proto]) 121 request_module("bt-proto-%d", proto); 122 123 err = -EPROTONOSUPPORT; 124 125 read_lock(&bt_proto_lock); 126 127 if (bt_proto[proto] && try_module_get(bt_proto[proto]->owner)) { 128 err = bt_proto[proto]->create(net, sock, proto, kern); 129 if (!err) 130 bt_sock_reclassify_lock(sock->sk, proto); 131 module_put(bt_proto[proto]->owner); 132 } 133 134 read_unlock(&bt_proto_lock); 135 136 return err; 137 } 138 139 void bt_sock_link(struct bt_sock_list *l, struct sock *sk) 140 { 141 write_lock(&l->lock); 142 sk_add_node(sk, &l->head); 143 write_unlock(&l->lock); 144 } 145 EXPORT_SYMBOL(bt_sock_link); 146 147 void bt_sock_unlink(struct bt_sock_list *l, struct sock *sk) 148 { 149 write_lock(&l->lock); 150 sk_del_node_init(sk); 151 write_unlock(&l->lock); 152 } 153 EXPORT_SYMBOL(bt_sock_unlink); 154 155 void bt_accept_enqueue(struct sock *parent, struct sock *sk) 156 { 157 BT_DBG("parent %p, sk %p", parent, sk); 158 159 sock_hold(sk); 160 list_add_tail(&bt_sk(sk)->accept_q, &bt_sk(parent)->accept_q); 161 bt_sk(sk)->parent = parent; 162 parent->sk_ack_backlog++; 163 } 164 EXPORT_SYMBOL(bt_accept_enqueue); 165 166 void bt_accept_unlink(struct sock *sk) 167 { 168 BT_DBG("sk %p state %d", sk, sk->sk_state); 169 170 list_del_init(&bt_sk(sk)->accept_q); 171 bt_sk(sk)->parent->sk_ack_backlog--; 172 bt_sk(sk)->parent = NULL; 173 sock_put(sk); 174 } 175 EXPORT_SYMBOL(bt_accept_unlink); 176 177 struct sock *bt_accept_dequeue(struct sock *parent, struct socket *newsock) 178 { 179 struct list_head *p, *n; 180 struct sock *sk; 181 182 BT_DBG("parent %p", parent); 183 184 list_for_each_safe(p, n, &bt_sk(parent)->accept_q) { 185 sk = (struct sock *) list_entry(p, struct bt_sock, accept_q); 186 187 lock_sock(sk); 188 189 /* FIXME: Is this check still needed */ 190 if (sk->sk_state == BT_CLOSED) { 191 release_sock(sk); 192 bt_accept_unlink(sk); 193 continue; 194 } 195 196 if (sk->sk_state == BT_CONNECTED || !newsock || 197 test_bit(BT_SK_DEFER_SETUP, &bt_sk(parent)->flags)) { 198 bt_accept_unlink(sk); 199 if (newsock) 200 sock_graft(sk, newsock); 201 202 release_sock(sk); 203 return sk; 204 } 205 206 release_sock(sk); 207 } 208 209 return NULL; 210 } 211 EXPORT_SYMBOL(bt_accept_dequeue); 212 213 int bt_sock_recvmsg(struct kiocb *iocb, struct socket *sock, 214 struct msghdr *msg, size_t len, int flags) 215 { 216 int noblock = flags & MSG_DONTWAIT; 217 struct sock *sk = sock->sk; 218 struct sk_buff *skb; 219 size_t copied; 220 int err; 221 222 BT_DBG("sock %p sk %p len %zu", sock, sk, len); 223 224 if (flags & (MSG_OOB)) 225 return -EOPNOTSUPP; 226 227 skb = skb_recv_datagram(sk, flags, noblock, &err); 228 if (!skb) { 229 if (sk->sk_shutdown & RCV_SHUTDOWN) 230 return 0; 231 232 return err; 233 } 234 235 copied = skb->len; 236 if (len < copied) { 237 msg->msg_flags |= MSG_TRUNC; 238 copied = len; 239 } 240 241 skb_reset_transport_header(skb); 242 err = skb_copy_datagram_msg(skb, 0, msg, copied); 243 if (err == 0) { 244 sock_recv_ts_and_drops(msg, sk, skb); 245 246 if (bt_sk(sk)->skb_msg_name) 247 bt_sk(sk)->skb_msg_name(skb, msg->msg_name, 248 &msg->msg_namelen); 249 } 250 251 skb_free_datagram(sk, skb); 252 253 return err ? : copied; 254 } 255 EXPORT_SYMBOL(bt_sock_recvmsg); 256 257 static long bt_sock_data_wait(struct sock *sk, long timeo) 258 { 259 DECLARE_WAITQUEUE(wait, current); 260 261 add_wait_queue(sk_sleep(sk), &wait); 262 for (;;) { 263 set_current_state(TASK_INTERRUPTIBLE); 264 265 if (!skb_queue_empty(&sk->sk_receive_queue)) 266 break; 267 268 if (sk->sk_err || (sk->sk_shutdown & RCV_SHUTDOWN)) 269 break; 270 271 if (signal_pending(current) || !timeo) 272 break; 273 274 set_bit(SOCK_ASYNC_WAITDATA, &sk->sk_socket->flags); 275 release_sock(sk); 276 timeo = schedule_timeout(timeo); 277 lock_sock(sk); 278 clear_bit(SOCK_ASYNC_WAITDATA, &sk->sk_socket->flags); 279 } 280 281 __set_current_state(TASK_RUNNING); 282 remove_wait_queue(sk_sleep(sk), &wait); 283 return timeo; 284 } 285 286 int bt_sock_stream_recvmsg(struct kiocb *iocb, struct socket *sock, 287 struct msghdr *msg, size_t size, int flags) 288 { 289 struct sock *sk = sock->sk; 290 int err = 0; 291 size_t target, copied = 0; 292 long timeo; 293 294 if (flags & MSG_OOB) 295 return -EOPNOTSUPP; 296 297 BT_DBG("sk %p size %zu", sk, size); 298 299 lock_sock(sk); 300 301 target = sock_rcvlowat(sk, flags & MSG_WAITALL, size); 302 timeo = sock_rcvtimeo(sk, flags & MSG_DONTWAIT); 303 304 do { 305 struct sk_buff *skb; 306 int chunk; 307 308 skb = skb_dequeue(&sk->sk_receive_queue); 309 if (!skb) { 310 if (copied >= target) 311 break; 312 313 err = sock_error(sk); 314 if (err) 315 break; 316 if (sk->sk_shutdown & RCV_SHUTDOWN) 317 break; 318 319 err = -EAGAIN; 320 if (!timeo) 321 break; 322 323 timeo = bt_sock_data_wait(sk, timeo); 324 325 if (signal_pending(current)) { 326 err = sock_intr_errno(timeo); 327 goto out; 328 } 329 continue; 330 } 331 332 chunk = min_t(unsigned int, skb->len, size); 333 if (skb_copy_datagram_msg(skb, 0, msg, chunk)) { 334 skb_queue_head(&sk->sk_receive_queue, skb); 335 if (!copied) 336 copied = -EFAULT; 337 break; 338 } 339 copied += chunk; 340 size -= chunk; 341 342 sock_recv_ts_and_drops(msg, sk, skb); 343 344 if (!(flags & MSG_PEEK)) { 345 int skb_len = skb_headlen(skb); 346 347 if (chunk <= skb_len) { 348 __skb_pull(skb, chunk); 349 } else { 350 struct sk_buff *frag; 351 352 __skb_pull(skb, skb_len); 353 chunk -= skb_len; 354 355 skb_walk_frags(skb, frag) { 356 if (chunk <= frag->len) { 357 /* Pulling partial data */ 358 skb->len -= chunk; 359 skb->data_len -= chunk; 360 __skb_pull(frag, chunk); 361 break; 362 } else if (frag->len) { 363 /* Pulling all frag data */ 364 chunk -= frag->len; 365 skb->len -= frag->len; 366 skb->data_len -= frag->len; 367 __skb_pull(frag, frag->len); 368 } 369 } 370 } 371 372 if (skb->len) { 373 skb_queue_head(&sk->sk_receive_queue, skb); 374 break; 375 } 376 kfree_skb(skb); 377 378 } else { 379 /* put message back and return */ 380 skb_queue_head(&sk->sk_receive_queue, skb); 381 break; 382 } 383 } while (size); 384 385 out: 386 release_sock(sk); 387 return copied ? : err; 388 } 389 EXPORT_SYMBOL(bt_sock_stream_recvmsg); 390 391 static inline unsigned int bt_accept_poll(struct sock *parent) 392 { 393 struct list_head *p, *n; 394 struct sock *sk; 395 396 list_for_each_safe(p, n, &bt_sk(parent)->accept_q) { 397 sk = (struct sock *) list_entry(p, struct bt_sock, accept_q); 398 if (sk->sk_state == BT_CONNECTED || 399 (test_bit(BT_SK_DEFER_SETUP, &bt_sk(parent)->flags) && 400 sk->sk_state == BT_CONNECT2)) 401 return POLLIN | POLLRDNORM; 402 } 403 404 return 0; 405 } 406 407 unsigned int bt_sock_poll(struct file *file, struct socket *sock, 408 poll_table *wait) 409 { 410 struct sock *sk = sock->sk; 411 unsigned int mask = 0; 412 413 BT_DBG("sock %p, sk %p", sock, sk); 414 415 poll_wait(file, sk_sleep(sk), wait); 416 417 if (sk->sk_state == BT_LISTEN) 418 return bt_accept_poll(sk); 419 420 if (sk->sk_err || !skb_queue_empty(&sk->sk_error_queue)) 421 mask |= POLLERR | 422 (sock_flag(sk, SOCK_SELECT_ERR_QUEUE) ? POLLPRI : 0); 423 424 if (sk->sk_shutdown & RCV_SHUTDOWN) 425 mask |= POLLRDHUP | POLLIN | POLLRDNORM; 426 427 if (sk->sk_shutdown == SHUTDOWN_MASK) 428 mask |= POLLHUP; 429 430 if (!skb_queue_empty(&sk->sk_receive_queue)) 431 mask |= POLLIN | POLLRDNORM; 432 433 if (sk->sk_state == BT_CLOSED) 434 mask |= POLLHUP; 435 436 if (sk->sk_state == BT_CONNECT || 437 sk->sk_state == BT_CONNECT2 || 438 sk->sk_state == BT_CONFIG) 439 return mask; 440 441 if (!test_bit(BT_SK_SUSPEND, &bt_sk(sk)->flags) && sock_writeable(sk)) 442 mask |= POLLOUT | POLLWRNORM | POLLWRBAND; 443 else 444 set_bit(SOCK_ASYNC_NOSPACE, &sk->sk_socket->flags); 445 446 return mask; 447 } 448 EXPORT_SYMBOL(bt_sock_poll); 449 450 int bt_sock_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg) 451 { 452 struct sock *sk = sock->sk; 453 struct sk_buff *skb; 454 long amount; 455 int err; 456 457 BT_DBG("sk %p cmd %x arg %lx", sk, cmd, arg); 458 459 switch (cmd) { 460 case TIOCOUTQ: 461 if (sk->sk_state == BT_LISTEN) 462 return -EINVAL; 463 464 amount = sk->sk_sndbuf - sk_wmem_alloc_get(sk); 465 if (amount < 0) 466 amount = 0; 467 err = put_user(amount, (int __user *) arg); 468 break; 469 470 case TIOCINQ: 471 if (sk->sk_state == BT_LISTEN) 472 return -EINVAL; 473 474 lock_sock(sk); 475 skb = skb_peek(&sk->sk_receive_queue); 476 amount = skb ? skb->len : 0; 477 release_sock(sk); 478 err = put_user(amount, (int __user *) arg); 479 break; 480 481 case SIOCGSTAMP: 482 err = sock_get_timestamp(sk, (struct timeval __user *) arg); 483 break; 484 485 case SIOCGSTAMPNS: 486 err = sock_get_timestampns(sk, (struct timespec __user *) arg); 487 break; 488 489 default: 490 err = -ENOIOCTLCMD; 491 break; 492 } 493 494 return err; 495 } 496 EXPORT_SYMBOL(bt_sock_ioctl); 497 498 /* This function expects the sk lock to be held when called */ 499 int bt_sock_wait_state(struct sock *sk, int state, unsigned long timeo) 500 { 501 DECLARE_WAITQUEUE(wait, current); 502 int err = 0; 503 504 BT_DBG("sk %p", sk); 505 506 add_wait_queue(sk_sleep(sk), &wait); 507 set_current_state(TASK_INTERRUPTIBLE); 508 while (sk->sk_state != state) { 509 if (!timeo) { 510 err = -EINPROGRESS; 511 break; 512 } 513 514 if (signal_pending(current)) { 515 err = sock_intr_errno(timeo); 516 break; 517 } 518 519 release_sock(sk); 520 timeo = schedule_timeout(timeo); 521 lock_sock(sk); 522 set_current_state(TASK_INTERRUPTIBLE); 523 524 err = sock_error(sk); 525 if (err) 526 break; 527 } 528 __set_current_state(TASK_RUNNING); 529 remove_wait_queue(sk_sleep(sk), &wait); 530 return err; 531 } 532 EXPORT_SYMBOL(bt_sock_wait_state); 533 534 /* This function expects the sk lock to be held when called */ 535 int bt_sock_wait_ready(struct sock *sk, unsigned long flags) 536 { 537 DECLARE_WAITQUEUE(wait, current); 538 unsigned long timeo; 539 int err = 0; 540 541 BT_DBG("sk %p", sk); 542 543 timeo = sock_sndtimeo(sk, flags & O_NONBLOCK); 544 545 add_wait_queue(sk_sleep(sk), &wait); 546 set_current_state(TASK_INTERRUPTIBLE); 547 while (test_bit(BT_SK_SUSPEND, &bt_sk(sk)->flags)) { 548 if (!timeo) { 549 err = -EAGAIN; 550 break; 551 } 552 553 if (signal_pending(current)) { 554 err = sock_intr_errno(timeo); 555 break; 556 } 557 558 release_sock(sk); 559 timeo = schedule_timeout(timeo); 560 lock_sock(sk); 561 set_current_state(TASK_INTERRUPTIBLE); 562 563 err = sock_error(sk); 564 if (err) 565 break; 566 } 567 __set_current_state(TASK_RUNNING); 568 remove_wait_queue(sk_sleep(sk), &wait); 569 570 return err; 571 } 572 EXPORT_SYMBOL(bt_sock_wait_ready); 573 574 #ifdef CONFIG_PROC_FS 575 struct bt_seq_state { 576 struct bt_sock_list *l; 577 }; 578 579 static void *bt_seq_start(struct seq_file *seq, loff_t *pos) 580 __acquires(seq->private->l->lock) 581 { 582 struct bt_seq_state *s = seq->private; 583 struct bt_sock_list *l = s->l; 584 585 read_lock(&l->lock); 586 return seq_hlist_start_head(&l->head, *pos); 587 } 588 589 static void *bt_seq_next(struct seq_file *seq, void *v, loff_t *pos) 590 { 591 struct bt_seq_state *s = seq->private; 592 struct bt_sock_list *l = s->l; 593 594 return seq_hlist_next(v, &l->head, pos); 595 } 596 597 static void bt_seq_stop(struct seq_file *seq, void *v) 598 __releases(seq->private->l->lock) 599 { 600 struct bt_seq_state *s = seq->private; 601 struct bt_sock_list *l = s->l; 602 603 read_unlock(&l->lock); 604 } 605 606 static int bt_seq_show(struct seq_file *seq, void *v) 607 { 608 struct bt_seq_state *s = seq->private; 609 struct bt_sock_list *l = s->l; 610 611 if (v == SEQ_START_TOKEN) { 612 seq_puts(seq ,"sk RefCnt Rmem Wmem User Inode Parent"); 613 614 if (l->custom_seq_show) { 615 seq_putc(seq, ' '); 616 l->custom_seq_show(seq, v); 617 } 618 619 seq_putc(seq, '\n'); 620 } else { 621 struct sock *sk = sk_entry(v); 622 struct bt_sock *bt = bt_sk(sk); 623 624 seq_printf(seq, 625 "%pK %-6d %-6u %-6u %-6u %-6lu %-6lu", 626 sk, 627 atomic_read(&sk->sk_refcnt), 628 sk_rmem_alloc_get(sk), 629 sk_wmem_alloc_get(sk), 630 from_kuid(seq_user_ns(seq), sock_i_uid(sk)), 631 sock_i_ino(sk), 632 bt->parent? sock_i_ino(bt->parent): 0LU); 633 634 if (l->custom_seq_show) { 635 seq_putc(seq, ' '); 636 l->custom_seq_show(seq, v); 637 } 638 639 seq_putc(seq, '\n'); 640 } 641 return 0; 642 } 643 644 static const struct seq_operations bt_seq_ops = { 645 .start = bt_seq_start, 646 .next = bt_seq_next, 647 .stop = bt_seq_stop, 648 .show = bt_seq_show, 649 }; 650 651 static int bt_seq_open(struct inode *inode, struct file *file) 652 { 653 struct bt_sock_list *sk_list; 654 struct bt_seq_state *s; 655 656 sk_list = PDE_DATA(inode); 657 s = __seq_open_private(file, &bt_seq_ops, 658 sizeof(struct bt_seq_state)); 659 if (!s) 660 return -ENOMEM; 661 662 s->l = sk_list; 663 return 0; 664 } 665 666 static const struct file_operations bt_fops = { 667 .open = bt_seq_open, 668 .read = seq_read, 669 .llseek = seq_lseek, 670 .release = seq_release_private 671 }; 672 673 int bt_procfs_init(struct net *net, const char *name, 674 struct bt_sock_list* sk_list, 675 int (* seq_show)(struct seq_file *, void *)) 676 { 677 sk_list->custom_seq_show = seq_show; 678 679 if (!proc_create_data(name, 0, net->proc_net, &bt_fops, sk_list)) 680 return -ENOMEM; 681 return 0; 682 } 683 684 void bt_procfs_cleanup(struct net *net, const char *name) 685 { 686 remove_proc_entry(name, net->proc_net); 687 } 688 #else 689 int bt_procfs_init(struct net *net, const char *name, 690 struct bt_sock_list* sk_list, 691 int (* seq_show)(struct seq_file *, void *)) 692 { 693 return 0; 694 } 695 696 void bt_procfs_cleanup(struct net *net, const char *name) 697 { 698 } 699 #endif 700 EXPORT_SYMBOL(bt_procfs_init); 701 EXPORT_SYMBOL(bt_procfs_cleanup); 702 703 static struct net_proto_family bt_sock_family_ops = { 704 .owner = THIS_MODULE, 705 .family = PF_BLUETOOTH, 706 .create = bt_sock_create, 707 }; 708 709 struct dentry *bt_debugfs; 710 EXPORT_SYMBOL_GPL(bt_debugfs); 711 712 static int __init bt_init(void) 713 { 714 struct sk_buff *skb; 715 int err; 716 717 BUILD_BUG_ON(sizeof(struct bt_skb_cb) > sizeof(skb->cb)); 718 719 BT_INFO("Core ver %s", VERSION); 720 721 err = bt_selftest(); 722 if (err < 0) 723 return err; 724 725 bt_debugfs = debugfs_create_dir("bluetooth", NULL); 726 727 err = bt_sysfs_init(); 728 if (err < 0) 729 return err; 730 731 err = sock_register(&bt_sock_family_ops); 732 if (err < 0) { 733 bt_sysfs_cleanup(); 734 return err; 735 } 736 737 BT_INFO("HCI device and connection manager initialized"); 738 739 err = hci_sock_init(); 740 if (err < 0) 741 goto error; 742 743 err = l2cap_init(); 744 if (err < 0) 745 goto sock_err; 746 747 err = sco_init(); 748 if (err < 0) { 749 l2cap_exit(); 750 goto sock_err; 751 } 752 753 return 0; 754 755 sock_err: 756 hci_sock_cleanup(); 757 758 error: 759 sock_unregister(PF_BLUETOOTH); 760 bt_sysfs_cleanup(); 761 762 return err; 763 } 764 765 static void __exit bt_exit(void) 766 { 767 sco_exit(); 768 769 l2cap_exit(); 770 771 hci_sock_cleanup(); 772 773 sock_unregister(PF_BLUETOOTH); 774 775 bt_sysfs_cleanup(); 776 777 debugfs_remove_recursive(bt_debugfs); 778 } 779 780 subsys_initcall(bt_init); 781 module_exit(bt_exit); 782 783 MODULE_AUTHOR("Marcel Holtmann <marcel@holtmann.org>"); 784 MODULE_DESCRIPTION("Bluetooth Core ver " VERSION); 785 MODULE_VERSION(VERSION); 786 MODULE_LICENSE("GPL"); 787 MODULE_ALIAS_NETPROTO(PF_BLUETOOTH); 788