Commit | Line | Data |
---|---|---|
8e87d142 | 1 | /* |
1da177e4 LT |
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 | |
8e87d142 YH |
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 | |
1da177e4 LT |
18 | OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. |
19 | ||
8e87d142 YH |
20 | ALL LIABILITY, INCLUDING LIABILITY FOR INFRINGEMENT OF ANY PATENTS, |
21 | COPYRIGHTS, TRADEMARKS OR OTHER RIGHTS, RELATING TO USE OF THIS | |
1da177e4 LT |
22 | SOFTWARE IS DISCLAIMED. |
23 | */ | |
24 | ||
25 | /* Bluetooth address family and sockets. */ | |
26 | ||
1da177e4 | 27 | #include <linux/module.h> |
3241ad82 | 28 | #include <asm/ioctls.h> |
1da177e4 LT |
29 | |
30 | #include <net/bluetooth/bluetooth.h> | |
256a06c8 | 31 | #include <linux/proc_fs.h> |
1da177e4 | 32 | |
dcbc729e | 33 | #define VERSION "2.17" |
1da177e4 LT |
34 | |
35 | /* Bluetooth sockets */ | |
36 | #define BT_MAX_PROTO 8 | |
ec1b4cf7 | 37 | static const struct net_proto_family *bt_proto[BT_MAX_PROTO]; |
db7aa1c2 | 38 | static DEFINE_RWLOCK(bt_proto_lock); |
68845cb2 | 39 | |
68845cb2 | 40 | static struct lock_class_key bt_lock_key[BT_MAX_PROTO]; |
36cbd3dc | 41 | static const char *const bt_key_strings[BT_MAX_PROTO] = { |
68845cb2 DY |
42 | "sk_lock-AF_BLUETOOTH-BTPROTO_L2CAP", |
43 | "sk_lock-AF_BLUETOOTH-BTPROTO_HCI", | |
44 | "sk_lock-AF_BLUETOOTH-BTPROTO_SCO", | |
45 | "sk_lock-AF_BLUETOOTH-BTPROTO_RFCOMM", | |
46 | "sk_lock-AF_BLUETOOTH-BTPROTO_BNEP", | |
47 | "sk_lock-AF_BLUETOOTH-BTPROTO_CMTP", | |
48 | "sk_lock-AF_BLUETOOTH-BTPROTO_HIDP", | |
49 | "sk_lock-AF_BLUETOOTH-BTPROTO_AVDTP", | |
50 | }; | |
51 | ||
db7aa1c2 | 52 | static struct lock_class_key bt_slock_key[BT_MAX_PROTO]; |
36cbd3dc | 53 | static const char *const bt_slock_key_strings[BT_MAX_PROTO] = { |
68845cb2 DY |
54 | "slock-AF_BLUETOOTH-BTPROTO_L2CAP", |
55 | "slock-AF_BLUETOOTH-BTPROTO_HCI", | |
56 | "slock-AF_BLUETOOTH-BTPROTO_SCO", | |
57 | "slock-AF_BLUETOOTH-BTPROTO_RFCOMM", | |
58 | "slock-AF_BLUETOOTH-BTPROTO_BNEP", | |
59 | "slock-AF_BLUETOOTH-BTPROTO_CMTP", | |
60 | "slock-AF_BLUETOOTH-BTPROTO_HIDP", | |
61 | "slock-AF_BLUETOOTH-BTPROTO_AVDTP", | |
62 | }; | |
db7aa1c2 | 63 | |
b5a30dda | 64 | void bt_sock_reclassify_lock(struct sock *sk, int proto) |
db7aa1c2 | 65 | { |
b5a30dda | 66 | BUG_ON(!sk); |
db7aa1c2 MH |
67 | BUG_ON(sock_owned_by_user(sk)); |
68 | ||
69 | sock_lock_init_class_and_name(sk, | |
70 | bt_slock_key_strings[proto], &bt_slock_key[proto], | |
71 | bt_key_strings[proto], &bt_lock_key[proto]); | |
72 | } | |
b5a30dda | 73 | EXPORT_SYMBOL(bt_sock_reclassify_lock); |
1da177e4 | 74 | |
ec1b4cf7 | 75 | int bt_sock_register(int proto, const struct net_proto_family *ops) |
1da177e4 | 76 | { |
74da626a MH |
77 | int err = 0; |
78 | ||
1da177e4 LT |
79 | if (proto < 0 || proto >= BT_MAX_PROTO) |
80 | return -EINVAL; | |
81 | ||
74da626a MH |
82 | write_lock(&bt_proto_lock); |
83 | ||
1da177e4 | 84 | if (bt_proto[proto]) |
74da626a MH |
85 | err = -EEXIST; |
86 | else | |
87 | bt_proto[proto] = ops; | |
88 | ||
89 | write_unlock(&bt_proto_lock); | |
1da177e4 | 90 | |
74da626a | 91 | return err; |
1da177e4 LT |
92 | } |
93 | EXPORT_SYMBOL(bt_sock_register); | |
94 | ||
be9f97f0 | 95 | void bt_sock_unregister(int proto) |
1da177e4 LT |
96 | { |
97 | if (proto < 0 || proto >= BT_MAX_PROTO) | |
be9f97f0 | 98 | return; |
1da177e4 | 99 | |
74da626a | 100 | write_lock(&bt_proto_lock); |
be9f97f0 | 101 | bt_proto[proto] = NULL; |
74da626a | 102 | write_unlock(&bt_proto_lock); |
1da177e4 LT |
103 | } |
104 | EXPORT_SYMBOL(bt_sock_unregister); | |
105 | ||
3f378b68 EP |
106 | static int bt_sock_create(struct net *net, struct socket *sock, int proto, |
107 | int kern) | |
1da177e4 | 108 | { |
74da626a | 109 | int err; |
1da177e4 | 110 | |
1b8d7ae4 EB |
111 | if (net != &init_net) |
112 | return -EAFNOSUPPORT; | |
113 | ||
1da177e4 LT |
114 | if (proto < 0 || proto >= BT_MAX_PROTO) |
115 | return -EINVAL; | |
116 | ||
95a5afca | 117 | if (!bt_proto[proto]) |
1da177e4 | 118 | request_module("bt-proto-%d", proto); |
74da626a | 119 | |
1da177e4 | 120 | err = -EPROTONOSUPPORT; |
74da626a MH |
121 | |
122 | read_lock(&bt_proto_lock); | |
123 | ||
1da177e4 | 124 | if (bt_proto[proto] && try_module_get(bt_proto[proto]->owner)) { |
3f378b68 | 125 | err = bt_proto[proto]->create(net, sock, proto, kern); |
b5a30dda OP |
126 | if (!err) |
127 | bt_sock_reclassify_lock(sock->sk, proto); | |
1da177e4 LT |
128 | module_put(bt_proto[proto]->owner); |
129 | } | |
74da626a MH |
130 | |
131 | read_unlock(&bt_proto_lock); | |
132 | ||
8e87d142 | 133 | return err; |
1da177e4 LT |
134 | } |
135 | ||
136 | void bt_sock_link(struct bt_sock_list *l, struct sock *sk) | |
137 | { | |
94f5bfb8 | 138 | write_lock(&l->lock); |
1da177e4 | 139 | sk_add_node(sk, &l->head); |
94f5bfb8 | 140 | write_unlock(&l->lock); |
1da177e4 LT |
141 | } |
142 | EXPORT_SYMBOL(bt_sock_link); | |
143 | ||
144 | void bt_sock_unlink(struct bt_sock_list *l, struct sock *sk) | |
145 | { | |
94f5bfb8 | 146 | write_lock(&l->lock); |
1da177e4 | 147 | sk_del_node_init(sk); |
94f5bfb8 | 148 | write_unlock(&l->lock); |
1da177e4 LT |
149 | } |
150 | EXPORT_SYMBOL(bt_sock_unlink); | |
151 | ||
152 | void bt_accept_enqueue(struct sock *parent, struct sock *sk) | |
153 | { | |
154 | BT_DBG("parent %p, sk %p", parent, sk); | |
155 | ||
156 | sock_hold(sk); | |
157 | list_add_tail(&bt_sk(sk)->accept_q, &bt_sk(parent)->accept_q); | |
158 | bt_sk(sk)->parent = parent; | |
159 | parent->sk_ack_backlog++; | |
160 | } | |
161 | EXPORT_SYMBOL(bt_accept_enqueue); | |
162 | ||
163 | void bt_accept_unlink(struct sock *sk) | |
164 | { | |
165 | BT_DBG("sk %p state %d", sk, sk->sk_state); | |
166 | ||
167 | list_del_init(&bt_sk(sk)->accept_q); | |
168 | bt_sk(sk)->parent->sk_ack_backlog--; | |
169 | bt_sk(sk)->parent = NULL; | |
170 | sock_put(sk); | |
171 | } | |
172 | EXPORT_SYMBOL(bt_accept_unlink); | |
173 | ||
174 | struct sock *bt_accept_dequeue(struct sock *parent, struct socket *newsock) | |
175 | { | |
176 | struct list_head *p, *n; | |
177 | struct sock *sk; | |
178 | ||
179 | BT_DBG("parent %p", parent); | |
180 | ||
181 | list_for_each_safe(p, n, &bt_sk(parent)->accept_q) { | |
182 | sk = (struct sock *) list_entry(p, struct bt_sock, accept_q); | |
183 | ||
8a154a8f | 184 | lock_sock(sk); |
1da177e4 LT |
185 | |
186 | /* FIXME: Is this check still needed */ | |
187 | if (sk->sk_state == BT_CLOSED) { | |
8a154a8f | 188 | release_sock(sk); |
1da177e4 LT |
189 | bt_accept_unlink(sk); |
190 | continue; | |
191 | } | |
192 | ||
c4f912e1 | 193 | if (sk->sk_state == BT_CONNECTED || !newsock || |
d060991f | 194 | test_bit(BT_SK_DEFER_SETUP, &bt_sk(parent)->flags)) { |
1da177e4 LT |
195 | bt_accept_unlink(sk); |
196 | if (newsock) | |
197 | sock_graft(sk, newsock); | |
d37f50e1 | 198 | |
8a154a8f | 199 | release_sock(sk); |
1da177e4 LT |
200 | return sk; |
201 | } | |
202 | ||
8a154a8f | 203 | release_sock(sk); |
1da177e4 | 204 | } |
d37f50e1 | 205 | |
1da177e4 LT |
206 | return NULL; |
207 | } | |
208 | EXPORT_SYMBOL(bt_accept_dequeue); | |
209 | ||
210 | int bt_sock_recvmsg(struct kiocb *iocb, struct socket *sock, | |
c4f912e1 | 211 | struct msghdr *msg, size_t len, int flags) |
1da177e4 LT |
212 | { |
213 | int noblock = flags & MSG_DONTWAIT; | |
214 | struct sock *sk = sock->sk; | |
215 | struct sk_buff *skb; | |
216 | size_t copied; | |
217 | int err; | |
218 | ||
a418b893 | 219 | BT_DBG("sock %p sk %p len %zu", sock, sk, len); |
1da177e4 LT |
220 | |
221 | if (flags & (MSG_OOB)) | |
222 | return -EOPNOTSUPP; | |
223 | ||
5a08ecce AE |
224 | skb = skb_recv_datagram(sk, flags, noblock, &err); |
225 | if (!skb) { | |
d9763698 MH |
226 | if (sk->sk_shutdown & RCV_SHUTDOWN) { |
227 | msg->msg_namelen = 0; | |
1da177e4 | 228 | return 0; |
d9763698 | 229 | } |
1da177e4 LT |
230 | return err; |
231 | } | |
232 | ||
1da177e4 LT |
233 | copied = skb->len; |
234 | if (len < copied) { | |
235 | msg->msg_flags |= MSG_TRUNC; | |
236 | copied = len; | |
237 | } | |
238 | ||
badff6d0 | 239 | skb_reset_transport_header(skb); |
1da177e4 | 240 | err = skb_copy_datagram_iovec(skb, 0, msg->msg_iov, copied); |
d9763698 | 241 | if (err == 0) { |
3b885787 | 242 | sock_recv_ts_and_drops(msg, sk, skb); |
1da177e4 | 243 | |
d9763698 MH |
244 | if (bt_sk(sk)->skb_msg_name) |
245 | bt_sk(sk)->skb_msg_name(skb, msg->msg_name, | |
246 | &msg->msg_namelen); | |
247 | else | |
248 | msg->msg_namelen = 0; | |
249 | } | |
250 | ||
1da177e4 LT |
251 | skb_free_datagram(sk, skb); |
252 | ||
253 | return err ? : copied; | |
254 | } | |
255 | EXPORT_SYMBOL(bt_sock_recvmsg); | |
256 | ||
796c86ee MM |
257 | static long bt_sock_data_wait(struct sock *sk, long timeo) |
258 | { | |
259 | DECLARE_WAITQUEUE(wait, current); | |
260 | ||
261 | add_wait_queue(sk_sleep(sk), &wait); | |
262 | for (;;) { | |
263 | set_current_state(TASK_INTERRUPTIBLE); | |
264 | ||
265 | if (!skb_queue_empty(&sk->sk_receive_queue)) | |
266 | break; | |
267 | ||
268 | if (sk->sk_err || (sk->sk_shutdown & RCV_SHUTDOWN)) | |
269 | break; | |
270 | ||
271 | if (signal_pending(current) || !timeo) | |
272 | break; | |
273 | ||
274 | set_bit(SOCK_ASYNC_WAITDATA, &sk->sk_socket->flags); | |
275 | release_sock(sk); | |
276 | timeo = schedule_timeout(timeo); | |
277 | lock_sock(sk); | |
278 | clear_bit(SOCK_ASYNC_WAITDATA, &sk->sk_socket->flags); | |
279 | } | |
280 | ||
281 | __set_current_state(TASK_RUNNING); | |
282 | remove_wait_queue(sk_sleep(sk), &wait); | |
283 | return timeo; | |
284 | } | |
285 | ||
286 | int bt_sock_stream_recvmsg(struct kiocb *iocb, struct socket *sock, | |
287 | struct msghdr *msg, size_t size, int flags) | |
288 | { | |
289 | struct sock *sk = sock->sk; | |
290 | int err = 0; | |
291 | size_t target, copied = 0; | |
292 | long timeo; | |
293 | ||
294 | if (flags & MSG_OOB) | |
295 | return -EOPNOTSUPP; | |
296 | ||
297 | msg->msg_namelen = 0; | |
298 | ||
299 | BT_DBG("sk %p size %zu", sk, size); | |
300 | ||
301 | lock_sock(sk); | |
302 | ||
303 | target = sock_rcvlowat(sk, flags & MSG_WAITALL, size); | |
304 | timeo = sock_rcvtimeo(sk, flags & MSG_DONTWAIT); | |
305 | ||
306 | do { | |
307 | struct sk_buff *skb; | |
308 | int chunk; | |
309 | ||
310 | skb = skb_dequeue(&sk->sk_receive_queue); | |
311 | if (!skb) { | |
312 | if (copied >= target) | |
313 | break; | |
314 | ||
5a08ecce AE |
315 | err = sock_error(sk); |
316 | if (err) | |
796c86ee MM |
317 | break; |
318 | if (sk->sk_shutdown & RCV_SHUTDOWN) | |
319 | break; | |
320 | ||
321 | err = -EAGAIN; | |
322 | if (!timeo) | |
323 | break; | |
324 | ||
325 | timeo = bt_sock_data_wait(sk, timeo); | |
326 | ||
327 | if (signal_pending(current)) { | |
328 | err = sock_intr_errno(timeo); | |
329 | goto out; | |
330 | } | |
331 | continue; | |
332 | } | |
333 | ||
334 | chunk = min_t(unsigned int, skb->len, size); | |
5b668eb3 | 335 | if (skb_copy_datagram_iovec(skb, 0, msg->msg_iov, chunk)) { |
796c86ee MM |
336 | skb_queue_head(&sk->sk_receive_queue, skb); |
337 | if (!copied) | |
338 | copied = -EFAULT; | |
339 | break; | |
340 | } | |
341 | copied += chunk; | |
342 | size -= chunk; | |
343 | ||
344 | sock_recv_ts_and_drops(msg, sk, skb); | |
345 | ||
346 | if (!(flags & MSG_PEEK)) { | |
5b668eb3 MM |
347 | int skb_len = skb_headlen(skb); |
348 | ||
349 | if (chunk <= skb_len) { | |
350 | __skb_pull(skb, chunk); | |
351 | } else { | |
352 | struct sk_buff *frag; | |
353 | ||
354 | __skb_pull(skb, skb_len); | |
355 | chunk -= skb_len; | |
356 | ||
357 | skb_walk_frags(skb, frag) { | |
358 | if (chunk <= frag->len) { | |
359 | /* Pulling partial data */ | |
360 | skb->len -= chunk; | |
361 | skb->data_len -= chunk; | |
362 | __skb_pull(frag, chunk); | |
363 | break; | |
364 | } else if (frag->len) { | |
365 | /* Pulling all frag data */ | |
366 | chunk -= frag->len; | |
367 | skb->len -= frag->len; | |
368 | skb->data_len -= frag->len; | |
369 | __skb_pull(frag, frag->len); | |
370 | } | |
371 | } | |
372 | } | |
373 | ||
796c86ee MM |
374 | if (skb->len) { |
375 | skb_queue_head(&sk->sk_receive_queue, skb); | |
376 | break; | |
377 | } | |
378 | kfree_skb(skb); | |
379 | ||
380 | } else { | |
381 | /* put message back and return */ | |
382 | skb_queue_head(&sk->sk_receive_queue, skb); | |
383 | break; | |
384 | } | |
385 | } while (size); | |
386 | ||
387 | out: | |
388 | release_sock(sk); | |
389 | return copied ? : err; | |
390 | } | |
391 | EXPORT_SYMBOL(bt_sock_stream_recvmsg); | |
392 | ||
1da177e4 LT |
393 | static inline unsigned int bt_accept_poll(struct sock *parent) |
394 | { | |
395 | struct list_head *p, *n; | |
396 | struct sock *sk; | |
397 | ||
398 | list_for_each_safe(p, n, &bt_sk(parent)->accept_q) { | |
399 | sk = (struct sock *) list_entry(p, struct bt_sock, accept_q); | |
d5f2d2be | 400 | if (sk->sk_state == BT_CONNECTED || |
c5daa683 GP |
401 | (test_bit(BT_SK_DEFER_SETUP, &bt_sk(parent)->flags) && |
402 | sk->sk_state == BT_CONNECT2)) | |
1da177e4 LT |
403 | return POLLIN | POLLRDNORM; |
404 | } | |
405 | ||
406 | return 0; | |
407 | } | |
408 | ||
8fc9ced3 GP |
409 | unsigned int bt_sock_poll(struct file *file, struct socket *sock, |
410 | poll_table *wait) | |
1da177e4 LT |
411 | { |
412 | struct sock *sk = sock->sk; | |
413 | unsigned int mask = 0; | |
414 | ||
415 | BT_DBG("sock %p, sk %p", sock, sk); | |
416 | ||
aa395145 | 417 | poll_wait(file, sk_sleep(sk), wait); |
1da177e4 LT |
418 | |
419 | if (sk->sk_state == BT_LISTEN) | |
420 | return bt_accept_poll(sk); | |
421 | ||
422 | if (sk->sk_err || !skb_queue_empty(&sk->sk_error_queue)) | |
7d4c04fc | 423 | mask |= POLLERR | |
8facd5fb | 424 | (sock_flag(sk, SOCK_SELECT_ERR_QUEUE) ? POLLPRI : 0); |
1da177e4 | 425 | |
f348d70a | 426 | if (sk->sk_shutdown & RCV_SHUTDOWN) |
db40980f | 427 | mask |= POLLRDHUP | POLLIN | POLLRDNORM; |
f348d70a | 428 | |
1da177e4 LT |
429 | if (sk->sk_shutdown == SHUTDOWN_MASK) |
430 | mask |= POLLHUP; | |
431 | ||
db40980f | 432 | if (!skb_queue_empty(&sk->sk_receive_queue)) |
1da177e4 LT |
433 | mask |= POLLIN | POLLRDNORM; |
434 | ||
435 | if (sk->sk_state == BT_CLOSED) | |
436 | mask |= POLLHUP; | |
437 | ||
438 | if (sk->sk_state == BT_CONNECT || | |
439 | sk->sk_state == BT_CONNECT2 || | |
440 | sk->sk_state == BT_CONFIG) | |
441 | return mask; | |
442 | ||
c5daa683 | 443 | if (!test_bit(BT_SK_SUSPEND, &bt_sk(sk)->flags) && sock_writeable(sk)) |
1da177e4 LT |
444 | mask |= POLLOUT | POLLWRNORM | POLLWRBAND; |
445 | else | |
446 | set_bit(SOCK_ASYNC_NOSPACE, &sk->sk_socket->flags); | |
447 | ||
448 | return mask; | |
449 | } | |
450 | EXPORT_SYMBOL(bt_sock_poll); | |
451 | ||
3241ad82 MH |
452 | int bt_sock_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg) |
453 | { | |
454 | struct sock *sk = sock->sk; | |
43cbeee9 MH |
455 | struct sk_buff *skb; |
456 | long amount; | |
3241ad82 MH |
457 | int err; |
458 | ||
459 | BT_DBG("sk %p cmd %x arg %lx", sk, cmd, arg); | |
460 | ||
461 | switch (cmd) { | |
43cbeee9 MH |
462 | case TIOCOUTQ: |
463 | if (sk->sk_state == BT_LISTEN) | |
464 | return -EINVAL; | |
465 | ||
31e6d363 | 466 | amount = sk->sk_sndbuf - sk_wmem_alloc_get(sk); |
43cbeee9 MH |
467 | if (amount < 0) |
468 | amount = 0; | |
469 | err = put_user(amount, (int __user *) arg); | |
470 | break; | |
471 | ||
472 | case TIOCINQ: | |
473 | if (sk->sk_state == BT_LISTEN) | |
474 | return -EINVAL; | |
475 | ||
476 | lock_sock(sk); | |
477 | skb = skb_peek(&sk->sk_receive_queue); | |
478 | amount = skb ? skb->len : 0; | |
479 | release_sock(sk); | |
480 | err = put_user(amount, (int __user *) arg); | |
481 | break; | |
482 | ||
3241ad82 MH |
483 | case SIOCGSTAMP: |
484 | err = sock_get_timestamp(sk, (struct timeval __user *) arg); | |
485 | break; | |
486 | ||
487 | case SIOCGSTAMPNS: | |
488 | err = sock_get_timestampns(sk, (struct timespec __user *) arg); | |
489 | break; | |
490 | ||
491 | default: | |
492 | err = -ENOIOCTLCMD; | |
493 | break; | |
494 | } | |
495 | ||
496 | return err; | |
497 | } | |
498 | EXPORT_SYMBOL(bt_sock_ioctl); | |
499 | ||
0fba96f9 | 500 | /* This function expects the sk lock to be held when called */ |
1da177e4 LT |
501 | int bt_sock_wait_state(struct sock *sk, int state, unsigned long timeo) |
502 | { | |
503 | DECLARE_WAITQUEUE(wait, current); | |
504 | int err = 0; | |
505 | ||
506 | BT_DBG("sk %p", sk); | |
507 | ||
aa395145 | 508 | add_wait_queue(sk_sleep(sk), &wait); |
9be4e3fb | 509 | set_current_state(TASK_INTERRUPTIBLE); |
1da177e4 | 510 | while (sk->sk_state != state) { |
1da177e4 | 511 | if (!timeo) { |
b4c612a4 | 512 | err = -EINPROGRESS; |
1da177e4 LT |
513 | break; |
514 | } | |
515 | ||
516 | if (signal_pending(current)) { | |
517 | err = sock_intr_errno(timeo); | |
518 | break; | |
519 | } | |
520 | ||
521 | release_sock(sk); | |
522 | timeo = schedule_timeout(timeo); | |
523 | lock_sock(sk); | |
9be4e3fb | 524 | set_current_state(TASK_INTERRUPTIBLE); |
1da177e4 | 525 | |
c1cbe4b7 BL |
526 | err = sock_error(sk); |
527 | if (err) | |
1da177e4 | 528 | break; |
1da177e4 | 529 | } |
9be4e3fb | 530 | __set_current_state(TASK_RUNNING); |
aa395145 | 531 | remove_wait_queue(sk_sleep(sk), &wait); |
1da177e4 LT |
532 | return err; |
533 | } | |
534 | EXPORT_SYMBOL(bt_sock_wait_state); | |
535 | ||
e793dcf0 JH |
536 | /* This function expects the sk lock to be held when called */ |
537 | int bt_sock_wait_ready(struct sock *sk, unsigned long flags) | |
538 | { | |
539 | DECLARE_WAITQUEUE(wait, current); | |
540 | unsigned long timeo; | |
541 | int err = 0; | |
542 | ||
543 | BT_DBG("sk %p", sk); | |
544 | ||
545 | timeo = sock_sndtimeo(sk, flags & O_NONBLOCK); | |
546 | ||
547 | add_wait_queue(sk_sleep(sk), &wait); | |
548 | set_current_state(TASK_INTERRUPTIBLE); | |
549 | while (test_bit(BT_SK_SUSPEND, &bt_sk(sk)->flags)) { | |
550 | if (!timeo) { | |
551 | err = -EAGAIN; | |
552 | break; | |
553 | } | |
554 | ||
555 | if (signal_pending(current)) { | |
556 | err = sock_intr_errno(timeo); | |
557 | break; | |
558 | } | |
559 | ||
560 | release_sock(sk); | |
561 | timeo = schedule_timeout(timeo); | |
562 | lock_sock(sk); | |
563 | set_current_state(TASK_INTERRUPTIBLE); | |
564 | ||
565 | err = sock_error(sk); | |
566 | if (err) | |
567 | break; | |
568 | } | |
569 | __set_current_state(TASK_RUNNING); | |
570 | remove_wait_queue(sk_sleep(sk), &wait); | |
571 | ||
572 | return err; | |
573 | } | |
574 | EXPORT_SYMBOL(bt_sock_wait_ready); | |
575 | ||
256a06c8 MY |
576 | #ifdef CONFIG_PROC_FS |
577 | struct bt_seq_state { | |
578 | struct bt_sock_list *l; | |
579 | }; | |
580 | ||
581 | static void *bt_seq_start(struct seq_file *seq, loff_t *pos) | |
582 | __acquires(seq->private->l->lock) | |
583 | { | |
584 | struct bt_seq_state *s = seq->private; | |
585 | struct bt_sock_list *l = s->l; | |
586 | ||
587 | read_lock(&l->lock); | |
588 | return seq_hlist_start_head(&l->head, *pos); | |
589 | } | |
590 | ||
591 | static void *bt_seq_next(struct seq_file *seq, void *v, loff_t *pos) | |
592 | { | |
593 | struct bt_seq_state *s = seq->private; | |
594 | struct bt_sock_list *l = s->l; | |
595 | ||
596 | return seq_hlist_next(v, &l->head, pos); | |
597 | } | |
598 | ||
599 | static void bt_seq_stop(struct seq_file *seq, void *v) | |
600 | __releases(seq->private->l->lock) | |
601 | { | |
602 | struct bt_seq_state *s = seq->private; | |
603 | struct bt_sock_list *l = s->l; | |
604 | ||
605 | read_unlock(&l->lock); | |
606 | } | |
607 | ||
608 | static int bt_seq_show(struct seq_file *seq, void *v) | |
609 | { | |
256a06c8 MY |
610 | struct bt_seq_state *s = seq->private; |
611 | struct bt_sock_list *l = s->l; | |
256a06c8 MY |
612 | |
613 | if (v == SEQ_START_TOKEN) { | |
614 | seq_puts(seq ,"sk RefCnt Rmem Wmem User Inode Src Dst Parent"); | |
615 | ||
616 | if (l->custom_seq_show) { | |
617 | seq_putc(seq, ' '); | |
618 | l->custom_seq_show(seq, v); | |
619 | } | |
620 | ||
621 | seq_putc(seq, '\n'); | |
622 | } else { | |
09d5d4aa AE |
623 | struct sock *sk = sk_entry(v); |
624 | struct bt_sock *bt = bt_sk(sk); | |
256a06c8 | 625 | |
7028a886 | 626 | seq_printf(seq, |
5f6cd79f | 627 | "%pK %-6d %-6u %-6u %-6u %-6lu %-6lu", |
256a06c8 MY |
628 | sk, |
629 | atomic_read(&sk->sk_refcnt), | |
630 | sk_rmem_alloc_get(sk), | |
631 | sk_wmem_alloc_get(sk), | |
1bbb3095 | 632 | from_kuid(seq_user_ns(seq), sock_i_uid(sk)), |
256a06c8 | 633 | sock_i_ino(sk), |
256a06c8 MY |
634 | bt->parent? sock_i_ino(bt->parent): 0LU); |
635 | ||
636 | if (l->custom_seq_show) { | |
637 | seq_putc(seq, ' '); | |
638 | l->custom_seq_show(seq, v); | |
639 | } | |
640 | ||
641 | seq_putc(seq, '\n'); | |
642 | } | |
643 | return 0; | |
644 | } | |
645 | ||
646 | static struct seq_operations bt_seq_ops = { | |
647 | .start = bt_seq_start, | |
648 | .next = bt_seq_next, | |
649 | .stop = bt_seq_stop, | |
650 | .show = bt_seq_show, | |
651 | }; | |
652 | ||
653 | static int bt_seq_open(struct inode *inode, struct file *file) | |
654 | { | |
655 | struct bt_sock_list *sk_list; | |
656 | struct bt_seq_state *s; | |
657 | ||
d9dda78b | 658 | sk_list = PDE_DATA(inode); |
256a06c8 MY |
659 | s = __seq_open_private(file, &bt_seq_ops, |
660 | sizeof(struct bt_seq_state)); | |
31f47073 | 661 | if (!s) |
256a06c8 MY |
662 | return -ENOMEM; |
663 | ||
664 | s->l = sk_list; | |
665 | return 0; | |
666 | } | |
667 | ||
14805359 AV |
668 | static const struct file_operations bt_fops = { |
669 | .open = bt_seq_open, | |
670 | .read = seq_read, | |
671 | .llseek = seq_lseek, | |
672 | .release = seq_release_private | |
673 | }; | |
674 | ||
b0316615 | 675 | int bt_procfs_init(struct net *net, const char *name, |
256a06c8 MY |
676 | struct bt_sock_list* sk_list, |
677 | int (* seq_show)(struct seq_file *, void *)) | |
678 | { | |
256a06c8 MY |
679 | sk_list->custom_seq_show = seq_show; |
680 | ||
4d006263 | 681 | if (!proc_create_data(name, 0, net->proc_net, &bt_fops, sk_list)) |
256a06c8 | 682 | return -ENOMEM; |
256a06c8 MY |
683 | return 0; |
684 | } | |
685 | ||
686 | void bt_procfs_cleanup(struct net *net, const char *name) | |
687 | { | |
ece31ffd | 688 | remove_proc_entry(name, net->proc_net); |
256a06c8 MY |
689 | } |
690 | #else | |
b0316615 | 691 | int bt_procfs_init(struct net *net, const char *name, |
256a06c8 MY |
692 | struct bt_sock_list* sk_list, |
693 | int (* seq_show)(struct seq_file *, void *)) | |
694 | { | |
695 | return 0; | |
696 | } | |
697 | ||
698 | void bt_procfs_cleanup(struct net *net, const char *name) | |
699 | { | |
700 | } | |
701 | #endif | |
702 | EXPORT_SYMBOL(bt_procfs_init); | |
703 | EXPORT_SYMBOL(bt_procfs_cleanup); | |
704 | ||
1da177e4 LT |
705 | static struct net_proto_family bt_sock_family_ops = { |
706 | .owner = THIS_MODULE, | |
707 | .family = PF_BLUETOOTH, | |
708 | .create = bt_sock_create, | |
709 | }; | |
710 | ||
1da177e4 LT |
711 | static int __init bt_init(void) |
712 | { | |
27d35284 MH |
713 | int err; |
714 | ||
1da177e4 LT |
715 | BT_INFO("Core ver %s", VERSION); |
716 | ||
27d35284 MH |
717 | err = bt_sysfs_init(); |
718 | if (err < 0) | |
719 | return err; | |
1da177e4 | 720 | |
27d35284 MH |
721 | err = sock_register(&bt_sock_family_ops); |
722 | if (err < 0) { | |
723 | bt_sysfs_cleanup(); | |
724 | return err; | |
725 | } | |
1da177e4 | 726 | |
27d35284 | 727 | BT_INFO("HCI device and connection manager initialized"); |
1da177e4 | 728 | |
64274518 GP |
729 | err = hci_sock_init(); |
730 | if (err < 0) | |
731 | goto error; | |
732 | ||
733 | err = l2cap_init(); | |
0ed54dad | 734 | if (err < 0) |
64274518 | 735 | goto sock_err; |
64274518 GP |
736 | |
737 | err = sco_init(); | |
738 | if (err < 0) { | |
739 | l2cap_exit(); | |
740 | goto sock_err; | |
741 | } | |
1da177e4 LT |
742 | |
743 | return 0; | |
64274518 GP |
744 | |
745 | sock_err: | |
746 | hci_sock_cleanup(); | |
747 | ||
748 | error: | |
749 | sock_unregister(PF_BLUETOOTH); | |
750 | bt_sysfs_cleanup(); | |
751 | ||
752 | return err; | |
1da177e4 LT |
753 | } |
754 | ||
755 | static void __exit bt_exit(void) | |
756 | { | |
64274518 GP |
757 | |
758 | sco_exit(); | |
759 | ||
760 | l2cap_exit(); | |
761 | ||
1da177e4 LT |
762 | hci_sock_cleanup(); |
763 | ||
1da177e4 | 764 | sock_unregister(PF_BLUETOOTH); |
27d35284 MH |
765 | |
766 | bt_sysfs_cleanup(); | |
1da177e4 LT |
767 | } |
768 | ||
769 | subsys_initcall(bt_init); | |
770 | module_exit(bt_exit); | |
771 | ||
63fbd24e | 772 | MODULE_AUTHOR("Marcel Holtmann <marcel@holtmann.org>"); |
1da177e4 LT |
773 | MODULE_DESCRIPTION("Bluetooth Core ver " VERSION); |
774 | MODULE_VERSION(VERSION); | |
775 | MODULE_LICENSE("GPL"); | |
776 | MODULE_ALIAS_NETPROTO(PF_BLUETOOTH); |