| 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 <asm/ioctls.h> |
| 29 | |
| 30 | #include <net/bluetooth/bluetooth.h> |
| 31 | #include <linux/proc_fs.h> |
| 32 | |
| 33 | #ifndef CONFIG_BT_SOCK_DEBUG |
| 34 | #undef BT_DBG |
| 35 | #define BT_DBG(D...) |
| 36 | #endif |
| 37 | |
| 38 | #define VERSION "2.16" |
| 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_owned_by_user(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 | #ifdef CONFIG_PARANOID_NETWORK |
| 112 | static inline int current_has_bt_admin(void) |
| 113 | { |
| 114 | return !current_euid(); |
| 115 | } |
| 116 | |
| 117 | static inline int current_has_bt(void) |
| 118 | { |
| 119 | return current_has_bt_admin(); |
| 120 | } |
| 121 | # else |
| 122 | static inline int current_has_bt_admin(void) |
| 123 | { |
| 124 | return 1; |
| 125 | } |
| 126 | |
| 127 | static inline int current_has_bt(void) |
| 128 | { |
| 129 | return 1; |
| 130 | } |
| 131 | #endif |
| 132 | |
| 133 | static int bt_sock_create(struct net *net, struct socket *sock, int proto, |
| 134 | int kern) |
| 135 | { |
| 136 | int err; |
| 137 | |
| 138 | if (proto == BTPROTO_RFCOMM || proto == BTPROTO_SCO || |
| 139 | proto == BTPROTO_L2CAP) { |
| 140 | if (!current_has_bt()) |
| 141 | return -EPERM; |
| 142 | } else if (!current_has_bt_admin()) |
| 143 | return -EPERM; |
| 144 | |
| 145 | if (net != &init_net) |
| 146 | return -EAFNOSUPPORT; |
| 147 | |
| 148 | if (proto < 0 || proto >= BT_MAX_PROTO) |
| 149 | return -EINVAL; |
| 150 | |
| 151 | if (!bt_proto[proto]) |
| 152 | request_module("bt-proto-%d", proto); |
| 153 | |
| 154 | err = -EPROTONOSUPPORT; |
| 155 | |
| 156 | read_lock(&bt_proto_lock); |
| 157 | |
| 158 | if (bt_proto[proto] && try_module_get(bt_proto[proto]->owner)) { |
| 159 | err = bt_proto[proto]->create(net, sock, proto, kern); |
| 160 | if (!err) |
| 161 | bt_sock_reclassify_lock(sock->sk, proto); |
| 162 | module_put(bt_proto[proto]->owner); |
| 163 | } |
| 164 | |
| 165 | read_unlock(&bt_proto_lock); |
| 166 | |
| 167 | return err; |
| 168 | } |
| 169 | |
| 170 | void bt_sock_link(struct bt_sock_list *l, struct sock *sk) |
| 171 | { |
| 172 | write_lock(&l->lock); |
| 173 | sk_add_node(sk, &l->head); |
| 174 | write_unlock(&l->lock); |
| 175 | } |
| 176 | EXPORT_SYMBOL(bt_sock_link); |
| 177 | |
| 178 | void bt_sock_unlink(struct bt_sock_list *l, struct sock *sk) |
| 179 | { |
| 180 | write_lock(&l->lock); |
| 181 | sk_del_node_init(sk); |
| 182 | write_unlock(&l->lock); |
| 183 | } |
| 184 | EXPORT_SYMBOL(bt_sock_unlink); |
| 185 | |
| 186 | void bt_accept_enqueue(struct sock *parent, struct sock *sk) |
| 187 | { |
| 188 | BT_DBG("parent %p, sk %p", parent, sk); |
| 189 | |
| 190 | sock_hold(sk); |
| 191 | list_add_tail(&bt_sk(sk)->accept_q, &bt_sk(parent)->accept_q); |
| 192 | bt_sk(sk)->parent = parent; |
| 193 | parent->sk_ack_backlog++; |
| 194 | } |
| 195 | EXPORT_SYMBOL(bt_accept_enqueue); |
| 196 | |
| 197 | void bt_accept_unlink(struct sock *sk) |
| 198 | { |
| 199 | BT_DBG("sk %p state %d", sk, sk->sk_state); |
| 200 | |
| 201 | list_del_init(&bt_sk(sk)->accept_q); |
| 202 | bt_sk(sk)->parent->sk_ack_backlog--; |
| 203 | bt_sk(sk)->parent = NULL; |
| 204 | sock_put(sk); |
| 205 | } |
| 206 | EXPORT_SYMBOL(bt_accept_unlink); |
| 207 | |
| 208 | struct sock *bt_accept_dequeue(struct sock *parent, struct socket *newsock) |
| 209 | { |
| 210 | struct list_head *p, *n; |
| 211 | struct sock *sk; |
| 212 | |
| 213 | BT_DBG("parent %p", parent); |
| 214 | |
| 215 | list_for_each_safe(p, n, &bt_sk(parent)->accept_q) { |
| 216 | sk = (struct sock *) list_entry(p, struct bt_sock, accept_q); |
| 217 | |
| 218 | lock_sock(sk); |
| 219 | |
| 220 | /* FIXME: Is this check still needed */ |
| 221 | if (sk->sk_state == BT_CLOSED) { |
| 222 | release_sock(sk); |
| 223 | bt_accept_unlink(sk); |
| 224 | continue; |
| 225 | } |
| 226 | |
| 227 | if (sk->sk_state == BT_CONNECTED || !newsock || |
| 228 | test_bit(BT_SK_DEFER_SETUP, &bt_sk(parent)->flags)) { |
| 229 | bt_accept_unlink(sk); |
| 230 | if (newsock) |
| 231 | sock_graft(sk, newsock); |
| 232 | |
| 233 | release_sock(sk); |
| 234 | return sk; |
| 235 | } |
| 236 | |
| 237 | release_sock(sk); |
| 238 | } |
| 239 | |
| 240 | return NULL; |
| 241 | } |
| 242 | EXPORT_SYMBOL(bt_accept_dequeue); |
| 243 | |
| 244 | int bt_sock_recvmsg(struct kiocb *iocb, struct socket *sock, |
| 245 | struct msghdr *msg, size_t len, int flags) |
| 246 | { |
| 247 | int noblock = flags & MSG_DONTWAIT; |
| 248 | struct sock *sk = sock->sk; |
| 249 | struct sk_buff *skb; |
| 250 | size_t copied; |
| 251 | int err; |
| 252 | |
| 253 | BT_DBG("sock %p sk %p len %zu", sock, sk, len); |
| 254 | |
| 255 | if (flags & (MSG_OOB)) |
| 256 | return -EOPNOTSUPP; |
| 257 | |
| 258 | skb = skb_recv_datagram(sk, flags, noblock, &err); |
| 259 | if (!skb) { |
| 260 | if (sk->sk_shutdown & RCV_SHUTDOWN) |
| 261 | return 0; |
| 262 | return err; |
| 263 | } |
| 264 | |
| 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_iovec(skb, 0, msg->msg_iov, copied); |
| 273 | if (err == 0) |
| 274 | sock_recv_ts_and_drops(msg, sk, skb); |
| 275 | |
| 276 | skb_free_datagram(sk, skb); |
| 277 | |
| 278 | return err ? : copied; |
| 279 | } |
| 280 | EXPORT_SYMBOL(bt_sock_recvmsg); |
| 281 | |
| 282 | static long bt_sock_data_wait(struct sock *sk, long timeo) |
| 283 | { |
| 284 | DECLARE_WAITQUEUE(wait, current); |
| 285 | |
| 286 | add_wait_queue(sk_sleep(sk), &wait); |
| 287 | for (;;) { |
| 288 | set_current_state(TASK_INTERRUPTIBLE); |
| 289 | |
| 290 | if (!skb_queue_empty(&sk->sk_receive_queue)) |
| 291 | break; |
| 292 | |
| 293 | if (sk->sk_err || (sk->sk_shutdown & RCV_SHUTDOWN)) |
| 294 | break; |
| 295 | |
| 296 | if (signal_pending(current) || !timeo) |
| 297 | break; |
| 298 | |
| 299 | set_bit(SOCK_ASYNC_WAITDATA, &sk->sk_socket->flags); |
| 300 | release_sock(sk); |
| 301 | timeo = schedule_timeout(timeo); |
| 302 | lock_sock(sk); |
| 303 | clear_bit(SOCK_ASYNC_WAITDATA, &sk->sk_socket->flags); |
| 304 | } |
| 305 | |
| 306 | __set_current_state(TASK_RUNNING); |
| 307 | remove_wait_queue(sk_sleep(sk), &wait); |
| 308 | return timeo; |
| 309 | } |
| 310 | |
| 311 | int bt_sock_stream_recvmsg(struct kiocb *iocb, struct socket *sock, |
| 312 | struct msghdr *msg, size_t size, int flags) |
| 313 | { |
| 314 | struct sock *sk = sock->sk; |
| 315 | int err = 0; |
| 316 | size_t target, copied = 0; |
| 317 | long timeo; |
| 318 | |
| 319 | if (flags & MSG_OOB) |
| 320 | return -EOPNOTSUPP; |
| 321 | |
| 322 | BT_DBG("sk %p size %zu", sk, size); |
| 323 | |
| 324 | lock_sock(sk); |
| 325 | |
| 326 | target = sock_rcvlowat(sk, flags & MSG_WAITALL, size); |
| 327 | timeo = sock_rcvtimeo(sk, flags & MSG_DONTWAIT); |
| 328 | |
| 329 | do { |
| 330 | struct sk_buff *skb; |
| 331 | int chunk; |
| 332 | |
| 333 | skb = skb_dequeue(&sk->sk_receive_queue); |
| 334 | if (!skb) { |
| 335 | if (copied >= target) |
| 336 | break; |
| 337 | |
| 338 | err = sock_error(sk); |
| 339 | if (err) |
| 340 | break; |
| 341 | if (sk->sk_shutdown & RCV_SHUTDOWN) |
| 342 | break; |
| 343 | |
| 344 | err = -EAGAIN; |
| 345 | if (!timeo) |
| 346 | break; |
| 347 | |
| 348 | timeo = bt_sock_data_wait(sk, timeo); |
| 349 | |
| 350 | if (signal_pending(current)) { |
| 351 | err = sock_intr_errno(timeo); |
| 352 | goto out; |
| 353 | } |
| 354 | continue; |
| 355 | } |
| 356 | |
| 357 | chunk = min_t(unsigned int, skb->len, size); |
| 358 | if (skb_copy_datagram_iovec(skb, 0, msg->msg_iov, chunk)) { |
| 359 | skb_queue_head(&sk->sk_receive_queue, skb); |
| 360 | if (!copied) |
| 361 | copied = -EFAULT; |
| 362 | break; |
| 363 | } |
| 364 | copied += chunk; |
| 365 | size -= chunk; |
| 366 | |
| 367 | sock_recv_ts_and_drops(msg, sk, skb); |
| 368 | |
| 369 | if (!(flags & MSG_PEEK)) { |
| 370 | int skb_len = skb_headlen(skb); |
| 371 | |
| 372 | if (chunk <= skb_len) { |
| 373 | __skb_pull(skb, chunk); |
| 374 | } else { |
| 375 | struct sk_buff *frag; |
| 376 | |
| 377 | __skb_pull(skb, skb_len); |
| 378 | chunk -= skb_len; |
| 379 | |
| 380 | skb_walk_frags(skb, frag) { |
| 381 | if (chunk <= frag->len) { |
| 382 | /* Pulling partial data */ |
| 383 | skb->len -= chunk; |
| 384 | skb->data_len -= chunk; |
| 385 | __skb_pull(frag, chunk); |
| 386 | break; |
| 387 | } else if (frag->len) { |
| 388 | /* Pulling all frag data */ |
| 389 | chunk -= frag->len; |
| 390 | skb->len -= frag->len; |
| 391 | skb->data_len -= frag->len; |
| 392 | __skb_pull(frag, frag->len); |
| 393 | } |
| 394 | } |
| 395 | } |
| 396 | |
| 397 | if (skb->len) { |
| 398 | skb_queue_head(&sk->sk_receive_queue, skb); |
| 399 | break; |
| 400 | } |
| 401 | kfree_skb(skb); |
| 402 | |
| 403 | } else { |
| 404 | /* put message back and return */ |
| 405 | skb_queue_head(&sk->sk_receive_queue, skb); |
| 406 | break; |
| 407 | } |
| 408 | } while (size); |
| 409 | |
| 410 | out: |
| 411 | release_sock(sk); |
| 412 | return copied ? : err; |
| 413 | } |
| 414 | EXPORT_SYMBOL(bt_sock_stream_recvmsg); |
| 415 | |
| 416 | static inline unsigned int bt_accept_poll(struct sock *parent) |
| 417 | { |
| 418 | struct list_head *p, *n; |
| 419 | struct sock *sk; |
| 420 | |
| 421 | list_for_each_safe(p, n, &bt_sk(parent)->accept_q) { |
| 422 | sk = (struct sock *) list_entry(p, struct bt_sock, accept_q); |
| 423 | if (sk->sk_state == BT_CONNECTED || |
| 424 | (test_bit(BT_SK_DEFER_SETUP, &bt_sk(parent)->flags) && |
| 425 | sk->sk_state == BT_CONNECT2)) |
| 426 | return POLLIN | POLLRDNORM; |
| 427 | } |
| 428 | |
| 429 | return 0; |
| 430 | } |
| 431 | |
| 432 | unsigned int bt_sock_poll(struct file *file, struct socket *sock, |
| 433 | poll_table *wait) |
| 434 | { |
| 435 | struct sock *sk = sock->sk; |
| 436 | unsigned int mask = 0; |
| 437 | |
| 438 | BT_DBG("sock %p, sk %p", sock, sk); |
| 439 | |
| 440 | poll_wait(file, sk_sleep(sk), wait); |
| 441 | |
| 442 | if (sk->sk_state == BT_LISTEN) |
| 443 | return bt_accept_poll(sk); |
| 444 | |
| 445 | if (sk->sk_err || !skb_queue_empty(&sk->sk_error_queue)) |
| 446 | mask |= POLLERR | |
| 447 | (sock_flag(sk, SOCK_SELECT_ERR_QUEUE) ? POLLPRI : 0); |
| 448 | |
| 449 | if (sk->sk_shutdown & RCV_SHUTDOWN) |
| 450 | mask |= POLLRDHUP | POLLIN | POLLRDNORM; |
| 451 | |
| 452 | if (sk->sk_shutdown == SHUTDOWN_MASK) |
| 453 | mask |= POLLHUP; |
| 454 | |
| 455 | if (!skb_queue_empty(&sk->sk_receive_queue)) |
| 456 | mask |= POLLIN | POLLRDNORM; |
| 457 | |
| 458 | if (sk->sk_state == BT_CLOSED) |
| 459 | mask |= POLLHUP; |
| 460 | |
| 461 | if (sk->sk_state == BT_CONNECT || |
| 462 | sk->sk_state == BT_CONNECT2 || |
| 463 | sk->sk_state == BT_CONFIG) |
| 464 | return mask; |
| 465 | |
| 466 | if (!test_bit(BT_SK_SUSPEND, &bt_sk(sk)->flags) && sock_writeable(sk)) |
| 467 | mask |= POLLOUT | POLLWRNORM | POLLWRBAND; |
| 468 | else |
| 469 | set_bit(SOCK_ASYNC_NOSPACE, &sk->sk_socket->flags); |
| 470 | |
| 471 | return mask; |
| 472 | } |
| 473 | EXPORT_SYMBOL(bt_sock_poll); |
| 474 | |
| 475 | int bt_sock_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg) |
| 476 | { |
| 477 | struct sock *sk = sock->sk; |
| 478 | struct sk_buff *skb; |
| 479 | long amount; |
| 480 | int err; |
| 481 | |
| 482 | BT_DBG("sk %p cmd %x arg %lx", sk, cmd, arg); |
| 483 | |
| 484 | switch (cmd) { |
| 485 | case TIOCOUTQ: |
| 486 | if (sk->sk_state == BT_LISTEN) |
| 487 | return -EINVAL; |
| 488 | |
| 489 | amount = sk->sk_sndbuf - sk_wmem_alloc_get(sk); |
| 490 | if (amount < 0) |
| 491 | amount = 0; |
| 492 | err = put_user(amount, (int __user *) arg); |
| 493 | break; |
| 494 | |
| 495 | case TIOCINQ: |
| 496 | if (sk->sk_state == BT_LISTEN) |
| 497 | return -EINVAL; |
| 498 | |
| 499 | lock_sock(sk); |
| 500 | skb = skb_peek(&sk->sk_receive_queue); |
| 501 | amount = skb ? skb->len : 0; |
| 502 | release_sock(sk); |
| 503 | err = put_user(amount, (int __user *) arg); |
| 504 | break; |
| 505 | |
| 506 | case SIOCGSTAMP: |
| 507 | err = sock_get_timestamp(sk, (struct timeval __user *) arg); |
| 508 | break; |
| 509 | |
| 510 | case SIOCGSTAMPNS: |
| 511 | err = sock_get_timestampns(sk, (struct timespec __user *) arg); |
| 512 | break; |
| 513 | |
| 514 | default: |
| 515 | err = -ENOIOCTLCMD; |
| 516 | break; |
| 517 | } |
| 518 | |
| 519 | return err; |
| 520 | } |
| 521 | EXPORT_SYMBOL(bt_sock_ioctl); |
| 522 | |
| 523 | int bt_sock_wait_state(struct sock *sk, int state, unsigned long timeo) |
| 524 | { |
| 525 | DECLARE_WAITQUEUE(wait, current); |
| 526 | int err = 0; |
| 527 | |
| 528 | BT_DBG("sk %p", sk); |
| 529 | |
| 530 | add_wait_queue(sk_sleep(sk), &wait); |
| 531 | set_current_state(TASK_INTERRUPTIBLE); |
| 532 | while (sk->sk_state != state) { |
| 533 | if (!timeo) { |
| 534 | err = -EINPROGRESS; |
| 535 | break; |
| 536 | } |
| 537 | |
| 538 | if (signal_pending(current)) { |
| 539 | err = sock_intr_errno(timeo); |
| 540 | break; |
| 541 | } |
| 542 | |
| 543 | release_sock(sk); |
| 544 | timeo = schedule_timeout(timeo); |
| 545 | lock_sock(sk); |
| 546 | set_current_state(TASK_INTERRUPTIBLE); |
| 547 | |
| 548 | err = sock_error(sk); |
| 549 | if (err) |
| 550 | break; |
| 551 | } |
| 552 | __set_current_state(TASK_RUNNING); |
| 553 | remove_wait_queue(sk_sleep(sk), &wait); |
| 554 | return err; |
| 555 | } |
| 556 | EXPORT_SYMBOL(bt_sock_wait_state); |
| 557 | |
| 558 | #ifdef CONFIG_PROC_FS |
| 559 | struct bt_seq_state { |
| 560 | struct bt_sock_list *l; |
| 561 | }; |
| 562 | |
| 563 | static void *bt_seq_start(struct seq_file *seq, loff_t *pos) |
| 564 | __acquires(seq->private->l->lock) |
| 565 | { |
| 566 | struct bt_seq_state *s = seq->private; |
| 567 | struct bt_sock_list *l = s->l; |
| 568 | |
| 569 | read_lock(&l->lock); |
| 570 | return seq_hlist_start_head(&l->head, *pos); |
| 571 | } |
| 572 | |
| 573 | static void *bt_seq_next(struct seq_file *seq, void *v, loff_t *pos) |
| 574 | { |
| 575 | struct bt_seq_state *s = seq->private; |
| 576 | struct bt_sock_list *l = s->l; |
| 577 | |
| 578 | return seq_hlist_next(v, &l->head, pos); |
| 579 | } |
| 580 | |
| 581 | static void bt_seq_stop(struct seq_file *seq, void *v) |
| 582 | __releases(seq->private->l->lock) |
| 583 | { |
| 584 | struct bt_seq_state *s = seq->private; |
| 585 | struct bt_sock_list *l = s->l; |
| 586 | |
| 587 | read_unlock(&l->lock); |
| 588 | } |
| 589 | |
| 590 | static int bt_seq_show(struct seq_file *seq, void *v) |
| 591 | { |
| 592 | struct bt_seq_state *s = seq->private; |
| 593 | struct bt_sock_list *l = s->l; |
| 594 | |
| 595 | if (v == SEQ_START_TOKEN) { |
| 596 | seq_puts(seq ,"sk RefCnt Rmem Wmem User Inode Src Dst Parent"); |
| 597 | |
| 598 | if (l->custom_seq_show) { |
| 599 | seq_putc(seq, ' '); |
| 600 | l->custom_seq_show(seq, v); |
| 601 | } |
| 602 | |
| 603 | seq_putc(seq, '\n'); |
| 604 | } else { |
| 605 | struct sock *sk = sk_entry(v); |
| 606 | struct bt_sock *bt = bt_sk(sk); |
| 607 | |
| 608 | seq_printf(seq, |
| 609 | "%pK %-6d %-6u %-6u %-6u %-6lu %pMR %pMR %-6lu", |
| 610 | sk, |
| 611 | atomic_read(&sk->sk_refcnt), |
| 612 | sk_rmem_alloc_get(sk), |
| 613 | sk_wmem_alloc_get(sk), |
| 614 | from_kuid(seq_user_ns(seq), sock_i_uid(sk)), |
| 615 | sock_i_ino(sk), |
| 616 | &bt->src, |
| 617 | &bt->dst, |
| 618 | bt->parent? sock_i_ino(bt->parent): 0LU); |
| 619 | |
| 620 | if (l->custom_seq_show) { |
| 621 | seq_putc(seq, ' '); |
| 622 | l->custom_seq_show(seq, v); |
| 623 | } |
| 624 | |
| 625 | seq_putc(seq, '\n'); |
| 626 | } |
| 627 | return 0; |
| 628 | } |
| 629 | |
| 630 | static struct seq_operations bt_seq_ops = { |
| 631 | .start = bt_seq_start, |
| 632 | .next = bt_seq_next, |
| 633 | .stop = bt_seq_stop, |
| 634 | .show = bt_seq_show, |
| 635 | }; |
| 636 | |
| 637 | static int bt_seq_open(struct inode *inode, struct file *file) |
| 638 | { |
| 639 | struct bt_sock_list *sk_list; |
| 640 | struct bt_seq_state *s; |
| 641 | |
| 642 | sk_list = PDE_DATA(inode); |
| 643 | s = __seq_open_private(file, &bt_seq_ops, |
| 644 | sizeof(struct bt_seq_state)); |
| 645 | if (!s) |
| 646 | return -ENOMEM; |
| 647 | |
| 648 | s->l = sk_list; |
| 649 | return 0; |
| 650 | } |
| 651 | |
| 652 | static const struct file_operations bt_fops = { |
| 653 | .open = bt_seq_open, |
| 654 | .read = seq_read, |
| 655 | .llseek = seq_lseek, |
| 656 | .release = seq_release_private |
| 657 | }; |
| 658 | |
| 659 | int bt_procfs_init(struct net *net, const char *name, |
| 660 | struct bt_sock_list* sk_list, |
| 661 | int (* seq_show)(struct seq_file *, void *)) |
| 662 | { |
| 663 | sk_list->custom_seq_show = seq_show; |
| 664 | |
| 665 | if (!proc_create_data(name, 0, net->proc_net, &bt_fops, sk_list)) |
| 666 | return -ENOMEM; |
| 667 | return 0; |
| 668 | } |
| 669 | |
| 670 | void bt_procfs_cleanup(struct net *net, const char *name) |
| 671 | { |
| 672 | remove_proc_entry(name, net->proc_net); |
| 673 | } |
| 674 | #else |
| 675 | int bt_procfs_init(struct net *net, const char *name, |
| 676 | struct bt_sock_list* sk_list, |
| 677 | int (* seq_show)(struct seq_file *, void *)) |
| 678 | { |
| 679 | return 0; |
| 680 | } |
| 681 | |
| 682 | void bt_procfs_cleanup(struct net *net, const char *name) |
| 683 | { |
| 684 | } |
| 685 | #endif |
| 686 | EXPORT_SYMBOL(bt_procfs_init); |
| 687 | EXPORT_SYMBOL(bt_procfs_cleanup); |
| 688 | |
| 689 | static struct net_proto_family bt_sock_family_ops = { |
| 690 | .owner = THIS_MODULE, |
| 691 | .family = PF_BLUETOOTH, |
| 692 | .create = bt_sock_create, |
| 693 | }; |
| 694 | |
| 695 | static int __init bt_init(void) |
| 696 | { |
| 697 | int err; |
| 698 | |
| 699 | BT_INFO("Core ver %s", VERSION); |
| 700 | |
| 701 | err = bt_sysfs_init(); |
| 702 | if (err < 0) |
| 703 | return err; |
| 704 | |
| 705 | err = sock_register(&bt_sock_family_ops); |
| 706 | if (err < 0) { |
| 707 | bt_sysfs_cleanup(); |
| 708 | return err; |
| 709 | } |
| 710 | |
| 711 | BT_INFO("HCI device and connection manager initialized"); |
| 712 | |
| 713 | err = hci_sock_init(); |
| 714 | if (err < 0) |
| 715 | goto error; |
| 716 | |
| 717 | err = l2cap_init(); |
| 718 | if (err < 0) |
| 719 | goto sock_err; |
| 720 | |
| 721 | err = sco_init(); |
| 722 | if (err < 0) { |
| 723 | l2cap_exit(); |
| 724 | goto sock_err; |
| 725 | } |
| 726 | |
| 727 | return 0; |
| 728 | |
| 729 | sock_err: |
| 730 | hci_sock_cleanup(); |
| 731 | |
| 732 | error: |
| 733 | sock_unregister(PF_BLUETOOTH); |
| 734 | bt_sysfs_cleanup(); |
| 735 | |
| 736 | return err; |
| 737 | } |
| 738 | |
| 739 | static void __exit bt_exit(void) |
| 740 | { |
| 741 | |
| 742 | sco_exit(); |
| 743 | |
| 744 | l2cap_exit(); |
| 745 | |
| 746 | hci_sock_cleanup(); |
| 747 | |
| 748 | sock_unregister(PF_BLUETOOTH); |
| 749 | |
| 750 | bt_sysfs_cleanup(); |
| 751 | } |
| 752 | |
| 753 | subsys_initcall(bt_init); |
| 754 | module_exit(bt_exit); |
| 755 | |
| 756 | MODULE_AUTHOR("Marcel Holtmann <marcel@holtmann.org>"); |
| 757 | MODULE_DESCRIPTION("Bluetooth Core ver " VERSION); |
| 758 | MODULE_VERSION(VERSION); |
| 759 | MODULE_LICENSE("GPL"); |
| 760 | MODULE_ALIAS_NETPROTO(PF_BLUETOOTH); |