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