net/bluetooth/af_bluetooth.c

   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 #define VERSION "2.19"
  35
  36 /* Bluetooth sockets */
  37 #define BT_MAX_PROTO    8
  38 static const struct net_proto_family *bt_proto[BT_MAX_PROTO];
  39 static DEFINE_RWLOCK(bt_proto_lock);
  40
  41 static struct lock_class_key bt_lock_key[BT_MAX_PROTO];
  42 static 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
  53 static struct lock_class_key bt_slock_key[BT_MAX_PROTO];
  54 static 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
  65 void 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 }
  74 EXPORT_SYMBOL(bt_sock_reclassify_lock);
  75
  76 int 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 }
  94 EXPORT_SYMBOL(bt_sock_register);
  95
  96 void 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 }
 105 EXPORT_SYMBOL(bt_sock_unregister);
 106
 107 static 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
 137 void 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 }
 143 EXPORT_SYMBOL(bt_sock_link);
 144
 145 void 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 }
 151 EXPORT_SYMBOL(bt_sock_unlink);
 152
 153 void 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 }
 162 EXPORT_SYMBOL(bt_accept_enqueue);
 163
 164 void 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 }
 173 EXPORT_SYMBOL(bt_accept_unlink);
 174
 175 struct sock *bt_accept_dequeue(struct sock *parent, struct socket *newsock)
 176 {
 177         struct list_head *p, *n;
 178         struct sock *sk;
 179
 180         BT_DBG("parent %p", parent);
 181
 182         list_for_each_safe(p, n, &bt_sk(parent)->accept_q) {
 183                 sk = (struct sock *) list_entry(p, struct bt_sock, accept_q);
 184
 185                 lock_sock(sk);
 186
 187                 /* FIXME: Is this check still needed */
 188                 if (sk->sk_state == BT_CLOSED) {
 189                         release_sock(sk);
 190                         bt_accept_unlink(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 }
 209 EXPORT_SYMBOL(bt_accept_dequeue);
 210
 211 int bt_sock_recvmsg(struct kiocb *iocb, struct socket *sock,
 212                                 struct msghdr *msg, size_t len, 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_iovec(skb, 0, msg->msg_iov, 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 }
 253 EXPORT_SYMBOL(bt_sock_recvmsg);
 254
 255 static 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                 set_bit(SOCK_ASYNC_WAITDATA, &sk->sk_socket->flags);
 273                 release_sock(sk);
 274                 timeo = schedule_timeout(timeo);
 275                 lock_sock(sk);
 276                 clear_bit(SOCK_ASYNC_WAITDATA, &sk->sk_socket->flags);
 277         }
 278
 279         __set_current_state(TASK_RUNNING);
 280         remove_wait_queue(sk_sleep(sk), &wait);
 281         return timeo;
 282 }
 283
 284 int bt_sock_stream_recvmsg(struct kiocb *iocb, struct socket *sock,
 285                                struct msghdr *msg, 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_iovec(skb, 0, msg->msg_iov, 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
 383 out:
 384         release_sock(sk);
 385         return copied ? : err;
 386 }
 387 EXPORT_SYMBOL(bt_sock_stream_recvmsg);
 388
 389 static inline unsigned int bt_accept_poll(struct sock *parent)
 390 {
 391         struct list_head *p, *n;
 392         struct sock *sk;
 393
 394         list_for_each_safe(p, n, &bt_sk(parent)->accept_q) {
 395                 sk = (struct sock *) list_entry(p, struct bt_sock, accept_q);
 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
 405 unsigned 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                 set_bit(SOCK_ASYNC_NOSPACE, &sk->sk_socket->flags);
 443
 444         return mask;
 445 }
 446 EXPORT_SYMBOL(bt_sock_poll);
 447
 448 int 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 }
 494 EXPORT_SYMBOL(bt_sock_ioctl);
 495
 496 /* This function expects the sk lock to be held when called */
 497 int 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 }
 530 EXPORT_SYMBOL(bt_sock_wait_state);
 531
 532 /* This function expects the sk lock to be held when called */
 533 int 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 }
 570 EXPORT_SYMBOL(bt_sock_wait_ready);
 571
 572 #ifdef CONFIG_PROC_FS
 573 struct bt_seq_state {
 574         struct bt_sock_list *l;
 575 };
 576
 577 static 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
 587 static 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
 595 static 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
 604 static 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
 642 static 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
 649 static 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
 664 static 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
 671 int 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
 682 void bt_procfs_cleanup(struct net *net, const char *name)
 683 {
 684         remove_proc_entry(name, net->proc_net);
 685 }
 686 #else
 687 int 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
 694 void bt_procfs_cleanup(struct net *net, const char *name)
 695 {
 696 }
 697 #endif
 698 EXPORT_SYMBOL(bt_procfs_init);
 699 EXPORT_SYMBOL(bt_procfs_cleanup);
 700
 701 static struct net_proto_family bt_sock_family_ops = {
 702         .owner  = THIS_MODULE,
 703         .family = PF_BLUETOOTH,
 704         .create = bt_sock_create,
 705 };
 706
 707 struct dentry *bt_debugfs;
 708 EXPORT_SYMBOL_GPL(bt_debugfs);
 709
 710 static int __init bt_init(void)
 711 {
 712         struct sk_buff *skb;
 713         int err;
 714
 715         BUILD_BUG_ON(sizeof(struct bt_skb_cb) > sizeof(skb->cb));
 716
 717         BT_INFO("Core ver %s", VERSION);
 718
 719         bt_debugfs = debugfs_create_dir("bluetooth", NULL);
 720
 721         err = bt_sysfs_init();
 722         if (err < 0)
 723                 return err;
 724
 725         err = sock_register(&bt_sock_family_ops);
 726         if (err < 0) {
 727                 bt_sysfs_cleanup();
 728                 return err;
 729         }
 730
 731         BT_INFO("HCI device and connection manager initialized");
 732
 733         err = hci_sock_init();
 734         if (err < 0)
 735                 goto error;
 736
 737         err = l2cap_init();
 738         if (err < 0)
 739                 goto sock_err;
 740
 741         err = sco_init();
 742         if (err < 0) {
 743                 l2cap_exit();
 744                 goto sock_err;
 745         }
 746
 747         return 0;
 748
 749 sock_err:
 750         hci_sock_cleanup();
 751
 752 error:
 753         sock_unregister(PF_BLUETOOTH);
 754         bt_sysfs_cleanup();
 755
 756         return err;
 757 }
 758
 759 static void __exit bt_exit(void)
 760 {
 761         sco_exit();
 762
 763         l2cap_exit();
 764
 765         hci_sock_cleanup();
 766
 767         sock_unregister(PF_BLUETOOTH);
 768
 769         bt_sysfs_cleanup();
 770
 771         debugfs_remove_recursive(bt_debugfs);
 772 }
 773
 774 subsys_initcall(bt_init);
 775 module_exit(bt_exit);
 776
 777 MODULE_AUTHOR("Marcel Holtmann <marcel@holtmann.org>");
 778 MODULE_DESCRIPTION("Bluetooth Core ver " VERSION);
 779 MODULE_VERSION(VERSION);
 780 MODULE_LICENSE("GPL");
 781 MODULE_ALIAS_NETPROTO(PF_BLUETOOTH);