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 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 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); 99 100 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); 110 111 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 } 140 141 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); 148 149 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); 156 157 void bt_accept_enqueue(struct sock *parent, struct sock *sk) 158 { 159 BT_DBG("parent %p, sk %p", parent, sk); 160 161 sock_hold(sk); 162 lock_sock(sk); 163 list_add_tail(&bt_sk(sk)->accept_q, &bt_sk(parent)->accept_q); 164 bt_sk(sk)->parent = parent; 165 release_sock(sk); 166 parent->sk_ack_backlog++; 167 } 168 EXPORT_SYMBOL(bt_accept_enqueue); 169 170 /* Calling function must hold the sk lock. 171 * bt_sk(sk)->parent must be non-NULL meaning sk is in the parent list. 172 */ 173 void bt_accept_unlink(struct sock *sk) 174 { 175 BT_DBG("sk %p state %d", sk, sk->sk_state); 176 177 list_del_init(&bt_sk(sk)->accept_q); 178 bt_sk(sk)->parent->sk_ack_backlog--; 179 bt_sk(sk)->parent = NULL; 180 sock_put(sk); 181 } 182 EXPORT_SYMBOL(bt_accept_unlink); 183 184 struct sock *bt_accept_dequeue(struct sock *parent, struct socket *newsock) 185 { 186 struct bt_sock *s, *n; 187 struct sock *sk; 188 189 BT_DBG("parent %p", parent); 190 191 restart: 192 list_for_each_entry_safe(s, n, &bt_sk(parent)->accept_q, accept_q) { 193 sk = (struct sock *)s; 194 195 /* Prevent early freeing of sk due to unlink and sock_kill */ 196 sock_hold(sk); 197 lock_sock(sk); 198 199 /* Check sk has not already been unlinked via 200 * bt_accept_unlink() due to serialisation caused by sk locking 201 */ 202 if (!bt_sk(sk)->parent) { 203 BT_DBG("sk %p, already unlinked", sk); 204 release_sock(sk); 205 sock_put(sk); 206 207 /* Restart the loop as sk is no longer in the list 208 * and also avoid a potential infinite loop because 209 * list_for_each_entry_safe() is not thread safe. 210 */ 211 goto restart; 212 } 213 214 /* sk is safely in the parent list so reduce reference count */ 215 sock_put(sk); 216 217 /* FIXME: Is this check still needed */ 218 if (sk->sk_state == BT_CLOSED) { 219 bt_accept_unlink(sk); 220 release_sock(sk); 221 continue; 222 } 223 224 if (sk->sk_state == BT_CONNECTED || !newsock || 225 test_bit(BT_SK_DEFER_SETUP, &bt_sk(parent)->flags)) { 226 bt_accept_unlink(sk); 227 if (newsock) 228 sock_graft(sk, newsock); 229 230 release_sock(sk); 231 return sk; 232 } 233 234 release_sock(sk); 235 } 236 237 return NULL; 238 } 239 EXPORT_SYMBOL(bt_accept_dequeue); 240 241 int bt_sock_recvmsg(struct socket *sock, struct msghdr *msg, size_t len, 242 int flags) 243 { 244 int noblock = flags & MSG_DONTWAIT; 245 struct sock *sk = sock->sk; 246 struct sk_buff *skb; 247 size_t copied; 248 size_t skblen; 249 int err; 250 251 BT_DBG("sock %p sk %p len %zu", sock, sk, len); 252 253 if (flags & MSG_OOB) 254 return -EOPNOTSUPP; 255 256 skb = skb_recv_datagram(sk, flags, noblock, &err); 257 if (!skb) { 258 if (sk->sk_shutdown & RCV_SHUTDOWN) 259 return 0; 260 261 return err; 262 } 263 264 skblen = skb->len; 265 copied = skb->len; 266 if (len < copied) { 267 msg->msg_flags |= MSG_TRUNC; 268 copied = len; 269 } 270 271 skb_reset_transport_header(skb); 272 err = skb_copy_datagram_msg(skb, 0, msg, copied); 273 if (err == 0) { 274 sock_recv_ts_and_drops(msg, sk, skb); 275 276 if (msg->msg_name && bt_sk(sk)->skb_msg_name) 277 bt_sk(sk)->skb_msg_name(skb, msg->msg_name, 278 &msg->msg_namelen); 279 } 280 281 skb_free_datagram(sk, skb); 282 283 if (flags & MSG_TRUNC) 284 copied = skblen; 285 286 return err ? : copied; 287 } 288 EXPORT_SYMBOL(bt_sock_recvmsg); 289 290 static long bt_sock_data_wait(struct sock *sk, long timeo) 291 { 292 DECLARE_WAITQUEUE(wait, current); 293 294 add_wait_queue(sk_sleep(sk), &wait); 295 for (;;) { 296 set_current_state(TASK_INTERRUPTIBLE); 297 298 if (!skb_queue_empty(&sk->sk_receive_queue)) 299 break; 300 301 if (sk->sk_err || (sk->sk_shutdown & RCV_SHUTDOWN)) 302 break; 303 304 if (signal_pending(current) || !timeo) 305 break; 306 307 sk_set_bit(SOCKWQ_ASYNC_WAITDATA, sk); 308 release_sock(sk); 309 timeo = schedule_timeout(timeo); 310 lock_sock(sk); 311 sk_clear_bit(SOCKWQ_ASYNC_WAITDATA, sk); 312 } 313 314 __set_current_state(TASK_RUNNING); 315 remove_wait_queue(sk_sleep(sk), &wait); 316 return timeo; 317 } 318 319 int bt_sock_stream_recvmsg(struct socket *sock, struct msghdr *msg, 320 size_t size, int flags) 321 { 322 struct sock *sk = sock->sk; 323 int err = 0; 324 size_t target, copied = 0; 325 long timeo; 326 327 if (flags & MSG_OOB) 328 return -EOPNOTSUPP; 329 330 BT_DBG("sk %p size %zu", sk, size); 331 332 lock_sock(sk); 333 334 target = sock_rcvlowat(sk, flags & MSG_WAITALL, size); 335 timeo = sock_rcvtimeo(sk, flags & MSG_DONTWAIT); 336 337 do { 338 struct sk_buff *skb; 339 int chunk; 340 341 skb = skb_dequeue(&sk->sk_receive_queue); 342 if (!skb) { 343 if (copied >= target) 344 break; 345 346 err = sock_error(sk); 347 if (err) 348 break; 349 if (sk->sk_shutdown & RCV_SHUTDOWN) 350 break; 351 352 err = -EAGAIN; 353 if (!timeo) 354 break; 355 356 timeo = bt_sock_data_wait(sk, timeo); 357 358 if (signal_pending(current)) { 359 err = sock_intr_errno(timeo); 360 goto out; 361 } 362 continue; 363 } 364 365 chunk = min_t(unsigned int, skb->len, size); 366 if (skb_copy_datagram_msg(skb, 0, msg, chunk)) { 367 skb_queue_head(&sk->sk_receive_queue, skb); 368 if (!copied) 369 copied = -EFAULT; 370 break; 371 } 372 copied += chunk; 373 size -= chunk; 374 375 sock_recv_ts_and_drops(msg, sk, skb); 376 377 if (!(flags & MSG_PEEK)) { 378 int skb_len = skb_headlen(skb); 379 380 if (chunk <= skb_len) { 381 __skb_pull(skb, chunk); 382 } else { 383 struct sk_buff *frag; 384 385 __skb_pull(skb, skb_len); 386 chunk -= skb_len; 387 388 skb_walk_frags(skb, frag) { 389 if (chunk <= frag->len) { 390 /* Pulling partial data */ 391 skb->len -= chunk; 392 skb->data_len -= chunk; 393 __skb_pull(frag, chunk); 394 break; 395 } else if (frag->len) { 396 /* Pulling all frag data */ 397 chunk -= frag->len; 398 skb->len -= frag->len; 399 skb->data_len -= frag->len; 400 __skb_pull(frag, frag->len); 401 } 402 } 403 } 404 405 if (skb->len) { 406 skb_queue_head(&sk->sk_receive_queue, skb); 407 break; 408 } 409 kfree_skb(skb); 410 411 } else { 412 /* put message back and return */ 413 skb_queue_head(&sk->sk_receive_queue, skb); 414 break; 415 } 416 } while (size); 417 418 out: 419 release_sock(sk); 420 return copied ? : err; 421 } 422 EXPORT_SYMBOL(bt_sock_stream_recvmsg); 423 424 static inline unsigned int bt_accept_poll(struct sock *parent) 425 { 426 struct bt_sock *s, *n; 427 struct sock *sk; 428 429 list_for_each_entry_safe(s, n, &bt_sk(parent)->accept_q, accept_q) { 430 sk = (struct sock *)s; 431 if (sk->sk_state == BT_CONNECTED || 432 (test_bit(BT_SK_DEFER_SETUP, &bt_sk(parent)->flags) && 433 sk->sk_state == BT_CONNECT2)) 434 return POLLIN | POLLRDNORM; 435 } 436 437 return 0; 438 } 439 440 unsigned int bt_sock_poll(struct file *file, struct socket *sock, 441 poll_table *wait) 442 { 443 struct sock *sk = sock->sk; 444 unsigned int mask = 0; 445 446 BT_DBG("sock %p, sk %p", sock, sk); 447 448 poll_wait(file, sk_sleep(sk), wait); 449 450 if (sk->sk_state == BT_LISTEN) 451 return bt_accept_poll(sk); 452 453 if (sk->sk_err || !skb_queue_empty(&sk->sk_error_queue)) 454 mask |= POLLERR | 455 (sock_flag(sk, SOCK_SELECT_ERR_QUEUE) ? POLLPRI : 0); 456 457 if (sk->sk_shutdown & RCV_SHUTDOWN) 458 mask |= POLLRDHUP | POLLIN | POLLRDNORM; 459 460 if (sk->sk_shutdown == SHUTDOWN_MASK) 461 mask |= POLLHUP; 462 463 if (!skb_queue_empty(&sk->sk_receive_queue)) 464 mask |= POLLIN | POLLRDNORM; 465 466 if (sk->sk_state == BT_CLOSED) 467 mask |= POLLHUP; 468 469 if (sk->sk_state == BT_CONNECT || 470 sk->sk_state == BT_CONNECT2 || 471 sk->sk_state == BT_CONFIG) 472 return mask; 473 474 if (!test_bit(BT_SK_SUSPEND, &bt_sk(sk)->flags) && sock_writeable(sk)) 475 mask |= POLLOUT | POLLWRNORM | POLLWRBAND; 476 else 477 sk_set_bit(SOCKWQ_ASYNC_NOSPACE, sk); 478 479 return mask; 480 } 481 EXPORT_SYMBOL(bt_sock_poll); 482 483 int bt_sock_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg) 484 { 485 struct sock *sk = sock->sk; 486 struct sk_buff *skb; 487 long amount; 488 int err; 489 490 BT_DBG("sk %p cmd %x arg %lx", sk, cmd, arg); 491 492 switch (cmd) { 493 case TIOCOUTQ: 494 if (sk->sk_state == BT_LISTEN) 495 return -EINVAL; 496 497 amount = sk->sk_sndbuf - sk_wmem_alloc_get(sk); 498 if (amount < 0) 499 amount = 0; 500 err = put_user(amount, (int __user *) arg); 501 break; 502 503 case TIOCINQ: 504 if (sk->sk_state == BT_LISTEN) 505 return -EINVAL; 506 507 lock_sock(sk); 508 skb = skb_peek(&sk->sk_receive_queue); 509 amount = skb ? skb->len : 0; 510 release_sock(sk); 511 err = put_user(amount, (int __user *) arg); 512 break; 513 514 case SIOCGSTAMP: 515 err = sock_get_timestamp(sk, (struct timeval __user *) arg); 516 break; 517 518 case SIOCGSTAMPNS: 519 err = sock_get_timestampns(sk, (struct timespec __user *) arg); 520 break; 521 522 default: 523 err = -ENOIOCTLCMD; 524 break; 525 } 526 527 return err; 528 } 529 EXPORT_SYMBOL(bt_sock_ioctl); 530 531 /* This function expects the sk lock to be held when called */ 532 int bt_sock_wait_state(struct sock *sk, int state, unsigned long timeo) 533 { 534 DECLARE_WAITQUEUE(wait, current); 535 int err = 0; 536 537 BT_DBG("sk %p", sk); 538 539 add_wait_queue(sk_sleep(sk), &wait); 540 set_current_state(TASK_INTERRUPTIBLE); 541 while (sk->sk_state != state) { 542 if (!timeo) { 543 err = -EINPROGRESS; 544 break; 545 } 546 547 if (signal_pending(current)) { 548 err = sock_intr_errno(timeo); 549 break; 550 } 551 552 release_sock(sk); 553 timeo = schedule_timeout(timeo); 554 lock_sock(sk); 555 set_current_state(TASK_INTERRUPTIBLE); 556 557 err = sock_error(sk); 558 if (err) 559 break; 560 } 561 __set_current_state(TASK_RUNNING); 562 remove_wait_queue(sk_sleep(sk), &wait); 563 return err; 564 } 565 EXPORT_SYMBOL(bt_sock_wait_state); 566 567 /* This function expects the sk lock to be held when called */ 568 int bt_sock_wait_ready(struct sock *sk, unsigned long flags) 569 { 570 DECLARE_WAITQUEUE(wait, current); 571 unsigned long timeo; 572 int err = 0; 573 574 BT_DBG("sk %p", sk); 575 576 timeo = sock_sndtimeo(sk, flags & O_NONBLOCK); 577 578 add_wait_queue(sk_sleep(sk), &wait); 579 set_current_state(TASK_INTERRUPTIBLE); 580 while (test_bit(BT_SK_SUSPEND, &bt_sk(sk)->flags)) { 581 if (!timeo) { 582 err = -EAGAIN; 583 break; 584 } 585 586 if (signal_pending(current)) { 587 err = sock_intr_errno(timeo); 588 break; 589 } 590 591 release_sock(sk); 592 timeo = schedule_timeout(timeo); 593 lock_sock(sk); 594 set_current_state(TASK_INTERRUPTIBLE); 595 596 err = sock_error(sk); 597 if (err) 598 break; 599 } 600 __set_current_state(TASK_RUNNING); 601 remove_wait_queue(sk_sleep(sk), &wait); 602 603 return err; 604 } 605 EXPORT_SYMBOL(bt_sock_wait_ready); 606 607 #ifdef CONFIG_PROC_FS 608 struct bt_seq_state { 609 struct bt_sock_list *l; 610 }; 611 612 static void *bt_seq_start(struct seq_file *seq, loff_t *pos) 613 __acquires(seq->private->l->lock) 614 { 615 struct bt_seq_state *s = seq->private; 616 struct bt_sock_list *l = s->l; 617 618 read_lock(&l->lock); 619 return seq_hlist_start_head(&l->head, *pos); 620 } 621 622 static void *bt_seq_next(struct seq_file *seq, void *v, loff_t *pos) 623 { 624 struct bt_seq_state *s = seq->private; 625 struct bt_sock_list *l = s->l; 626 627 return seq_hlist_next(v, &l->head, pos); 628 } 629 630 static void bt_seq_stop(struct seq_file *seq, void *v) 631 __releases(seq->private->l->lock) 632 { 633 struct bt_seq_state *s = seq->private; 634 struct bt_sock_list *l = s->l; 635 636 read_unlock(&l->lock); 637 } 638 639 static int bt_seq_show(struct seq_file *seq, void *v) 640 { 641 struct bt_seq_state *s = seq->private; 642 struct bt_sock_list *l = s->l; 643 644 if (v == SEQ_START_TOKEN) { 645 seq_puts(seq ,"sk RefCnt Rmem Wmem User Inode Parent"); 646 647 if (l->custom_seq_show) { 648 seq_putc(seq, ' '); 649 l->custom_seq_show(seq, v); 650 } 651 652 seq_putc(seq, '\n'); 653 } else { 654 struct sock *sk = sk_entry(v); 655 struct bt_sock *bt = bt_sk(sk); 656 657 seq_printf(seq, 658 "%pK %-6d %-6u %-6u %-6u %-6lu %-6lu", 659 sk, 660 refcount_read(&sk->sk_refcnt), 661 sk_rmem_alloc_get(sk), 662 sk_wmem_alloc_get(sk), 663 from_kuid(seq_user_ns(seq), sock_i_uid(sk)), 664 sock_i_ino(sk), 665 bt->parent? sock_i_ino(bt->parent): 0LU); 666 667 if (l->custom_seq_show) { 668 seq_putc(seq, ' '); 669 l->custom_seq_show(seq, v); 670 } 671 672 seq_putc(seq, '\n'); 673 } 674 return 0; 675 } 676 677 static const struct seq_operations bt_seq_ops = { 678 .start = bt_seq_start, 679 .next = bt_seq_next, 680 .stop = bt_seq_stop, 681 .show = bt_seq_show, 682 }; 683 684 static int bt_seq_open(struct inode *inode, struct file *file) 685 { 686 struct bt_sock_list *sk_list; 687 struct bt_seq_state *s; 688 689 sk_list = PDE_DATA(inode); 690 s = __seq_open_private(file, &bt_seq_ops, 691 sizeof(struct bt_seq_state)); 692 if (!s) 693 return -ENOMEM; 694 695 s->l = sk_list; 696 return 0; 697 } 698 699 static const struct file_operations bt_fops = { 700 .open = bt_seq_open, 701 .read = seq_read, 702 .llseek = seq_lseek, 703 .release = seq_release_private 704 }; 705 706 int bt_procfs_init(struct net *net, const char *name, 707 struct bt_sock_list *sk_list, 708 int (* seq_show)(struct seq_file *, void *)) 709 { 710 sk_list->custom_seq_show = seq_show; 711 712 if (!proc_create_data(name, 0, net->proc_net, &bt_fops, sk_list)) 713 return -ENOMEM; 714 return 0; 715 } 716 717 void bt_procfs_cleanup(struct net *net, const char *name) 718 { 719 remove_proc_entry(name, net->proc_net); 720 } 721 #else 722 int bt_procfs_init(struct net *net, const char *name, 723 struct bt_sock_list *sk_list, 724 int (* seq_show)(struct seq_file *, void *)) 725 { 726 return 0; 727 } 728 729 void bt_procfs_cleanup(struct net *net, const char *name) 730 { 731 } 732 #endif 733 EXPORT_SYMBOL(bt_procfs_init); 734 EXPORT_SYMBOL(bt_procfs_cleanup); 735 736 static const struct net_proto_family bt_sock_family_ops = { 737 .owner = THIS_MODULE, 738 .family = PF_BLUETOOTH, 739 .create = bt_sock_create, 740 }; 741 742 struct dentry *bt_debugfs; 743 EXPORT_SYMBOL_GPL(bt_debugfs); 744 745 #define VERSION __stringify(BT_SUBSYS_VERSION) "." \ 746 __stringify(BT_SUBSYS_REVISION) 747 748 static int __init bt_init(void) 749 { 750 int err; 751 752 sock_skb_cb_check_size(sizeof(struct bt_skb_cb)); 753 754 BT_INFO("Core ver %s", VERSION); 755 756 err = bt_selftest(); 757 if (err < 0) 758 return err; 759 760 bt_debugfs = debugfs_create_dir("bluetooth", NULL); 761 762 bt_leds_init(); 763 764 err = bt_sysfs_init(); 765 if (err < 0) 766 return err; 767 768 err = sock_register(&bt_sock_family_ops); 769 if (err < 0) { 770 bt_sysfs_cleanup(); 771 return err; 772 } 773 774 BT_INFO("HCI device and connection manager initialized"); 775 776 err = hci_sock_init(); 777 if (err < 0) 778 goto error; 779 780 err = l2cap_init(); 781 if (err < 0) 782 goto sock_err; 783 784 err = sco_init(); 785 if (err < 0) { 786 l2cap_exit(); 787 goto sock_err; 788 } 789 790 err = mgmt_init(); 791 if (err < 0) { 792 sco_exit(); 793 l2cap_exit(); 794 goto sock_err; 795 } 796 797 return 0; 798 799 sock_err: 800 hci_sock_cleanup(); 801 802 error: 803 sock_unregister(PF_BLUETOOTH); 804 bt_sysfs_cleanup(); 805 806 return err; 807 } 808 809 static void __exit bt_exit(void) 810 { 811 mgmt_exit(); 812 813 sco_exit(); 814 815 l2cap_exit(); 816 817 hci_sock_cleanup(); 818 819 sock_unregister(PF_BLUETOOTH); 820 821 bt_sysfs_cleanup(); 822 823 bt_leds_cleanup(); 824 825 debugfs_remove_recursive(bt_debugfs); 826 } 827 828 subsys_initcall(bt_init); 829 module_exit(bt_exit); 830 831 MODULE_AUTHOR("Marcel Holtmann <marcel@holtmann.org>"); 832 MODULE_DESCRIPTION("Bluetooth Core ver " VERSION); 833 MODULE_VERSION(VERSION); 834 MODULE_LICENSE("GPL"); 835 MODULE_ALIAS_NETPROTO(PF_BLUETOOTH); 836