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> |
ffcecac6 | 28 | #include <linux/debugfs.h> |
3241ad82 | 29 | #include <asm/ioctls.h> |
1da177e4 LT |
30 | |
31 | #include <net/bluetooth/bluetooth.h> | |
256a06c8 | 32 | #include <linux/proc_fs.h> |
1da177e4 | 33 | |
ee485290 MH |
34 | #include "selftest.h" |
35 | ||
1da177e4 LT |
36 | /* Bluetooth sockets */ |
37 | #define BT_MAX_PROTO 8 | |
ec1b4cf7 | 38 | static const struct net_proto_family *bt_proto[BT_MAX_PROTO]; |
db7aa1c2 | 39 | static DEFINE_RWLOCK(bt_proto_lock); |
68845cb2 | 40 | |
68845cb2 | 41 | static struct lock_class_key bt_lock_key[BT_MAX_PROTO]; |
36cbd3dc | 42 | static const char *const bt_key_strings[BT_MAX_PROTO] = { |
68845cb2 DY |
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 | ||
db7aa1c2 | 53 | static struct lock_class_key bt_slock_key[BT_MAX_PROTO]; |
36cbd3dc | 54 | static const char *const bt_slock_key_strings[BT_MAX_PROTO] = { |
68845cb2 DY |
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 | }; | |
db7aa1c2 | 64 | |
b5a30dda | 65 | void bt_sock_reclassify_lock(struct sock *sk, int proto) |
db7aa1c2 | 66 | { |
b5a30dda | 67 | BUG_ON(!sk); |
fafc4e1e | 68 | BUG_ON(!sock_allow_reclassification(sk)); |
db7aa1c2 MH |
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 | } | |
b5a30dda | 74 | EXPORT_SYMBOL(bt_sock_reclassify_lock); |
1da177e4 | 75 | |
ec1b4cf7 | 76 | int bt_sock_register(int proto, const struct net_proto_family *ops) |
1da177e4 | 77 | { |
74da626a MH |
78 | int err = 0; |
79 | ||
1da177e4 LT |
80 | if (proto < 0 || proto >= BT_MAX_PROTO) |
81 | return -EINVAL; | |
82 | ||
74da626a MH |
83 | write_lock(&bt_proto_lock); |
84 | ||
1da177e4 | 85 | if (bt_proto[proto]) |
74da626a MH |
86 | err = -EEXIST; |
87 | else | |
88 | bt_proto[proto] = ops; | |
89 | ||
90 | write_unlock(&bt_proto_lock); | |
1da177e4 | 91 | |
74da626a | 92 | return err; |
1da177e4 LT |
93 | } |
94 | EXPORT_SYMBOL(bt_sock_register); | |
95 | ||
be9f97f0 | 96 | void bt_sock_unregister(int proto) |
1da177e4 LT |
97 | { |
98 | if (proto < 0 || proto >= BT_MAX_PROTO) | |
be9f97f0 | 99 | return; |
1da177e4 | 100 | |
74da626a | 101 | write_lock(&bt_proto_lock); |
be9f97f0 | 102 | bt_proto[proto] = NULL; |
74da626a | 103 | write_unlock(&bt_proto_lock); |
1da177e4 LT |
104 | } |
105 | EXPORT_SYMBOL(bt_sock_unregister); | |
106 | ||
3f378b68 EP |
107 | static int bt_sock_create(struct net *net, struct socket *sock, int proto, |
108 | int kern) | |
1da177e4 | 109 | { |
74da626a | 110 | int err; |
1da177e4 | 111 | |
1b8d7ae4 EB |
112 | if (net != &init_net) |
113 | return -EAFNOSUPPORT; | |
114 | ||
1da177e4 LT |
115 | if (proto < 0 || proto >= BT_MAX_PROTO) |
116 | return -EINVAL; | |
117 | ||
95a5afca | 118 | if (!bt_proto[proto]) |
1da177e4 | 119 | request_module("bt-proto-%d", proto); |
74da626a | 120 | |
1da177e4 | 121 | err = -EPROTONOSUPPORT; |
74da626a MH |
122 | |
123 | read_lock(&bt_proto_lock); | |
124 | ||
1da177e4 | 125 | if (bt_proto[proto] && try_module_get(bt_proto[proto]->owner)) { |
3f378b68 | 126 | err = bt_proto[proto]->create(net, sock, proto, kern); |
b5a30dda OP |
127 | if (!err) |
128 | bt_sock_reclassify_lock(sock->sk, proto); | |
1da177e4 LT |
129 | module_put(bt_proto[proto]->owner); |
130 | } | |
74da626a MH |
131 | |
132 | read_unlock(&bt_proto_lock); | |
133 | ||
8e87d142 | 134 | return err; |
1da177e4 LT |
135 | } |
136 | ||
137 | void bt_sock_link(struct bt_sock_list *l, struct sock *sk) | |
138 | { | |
94f5bfb8 | 139 | write_lock(&l->lock); |
1da177e4 | 140 | sk_add_node(sk, &l->head); |
94f5bfb8 | 141 | write_unlock(&l->lock); |
1da177e4 LT |
142 | } |
143 | EXPORT_SYMBOL(bt_sock_link); | |
144 | ||
145 | void bt_sock_unlink(struct bt_sock_list *l, struct sock *sk) | |
146 | { | |
94f5bfb8 | 147 | write_lock(&l->lock); |
1da177e4 | 148 | sk_del_node_init(sk); |
94f5bfb8 | 149 | write_unlock(&l->lock); |
1da177e4 LT |
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 | { | |
7eb7404f | 177 | struct bt_sock *s, *n; |
1da177e4 LT |
178 | struct sock *sk; |
179 | ||
180 | BT_DBG("parent %p", parent); | |
181 | ||
7eb7404f GT |
182 | list_for_each_entry_safe(s, n, &bt_sk(parent)->accept_q, accept_q) { |
183 | sk = (struct sock *)s; | |
1da177e4 | 184 | |
8a154a8f | 185 | lock_sock(sk); |
1da177e4 LT |
186 | |
187 | /* FIXME: Is this check still needed */ | |
188 | if (sk->sk_state == BT_CLOSED) { | |
1da177e4 | 189 | bt_accept_unlink(sk); |
1a11ec89 | 190 | release_sock(sk); |
1da177e4 LT |
191 | continue; |
192 | } | |
193 | ||
c4f912e1 | 194 | if (sk->sk_state == BT_CONNECTED || !newsock || |
d060991f | 195 | test_bit(BT_SK_DEFER_SETUP, &bt_sk(parent)->flags)) { |
1da177e4 LT |
196 | bt_accept_unlink(sk); |
197 | if (newsock) | |
198 | sock_graft(sk, newsock); | |
d37f50e1 | 199 | |
8a154a8f | 200 | release_sock(sk); |
1da177e4 LT |
201 | return sk; |
202 | } | |
203 | ||
8a154a8f | 204 | release_sock(sk); |
1da177e4 | 205 | } |
d37f50e1 | 206 | |
1da177e4 LT |
207 | return NULL; |
208 | } | |
209 | EXPORT_SYMBOL(bt_accept_dequeue); | |
210 | ||
1b784140 YX |
211 | int bt_sock_recvmsg(struct socket *sock, struct msghdr *msg, size_t len, |
212 | int flags) | |
1da177e4 LT |
213 | { |
214 | int noblock = flags & MSG_DONTWAIT; | |
215 | struct sock *sk = sock->sk; | |
216 | struct sk_buff *skb; | |
217 | size_t copied; | |
b5f34f94 | 218 | size_t skblen; |
1da177e4 LT |
219 | int err; |
220 | ||
a418b893 | 221 | BT_DBG("sock %p sk %p len %zu", sock, sk, len); |
1da177e4 | 222 | |
d94a6104 | 223 | if (flags & MSG_OOB) |
1da177e4 LT |
224 | return -EOPNOTSUPP; |
225 | ||
5a08ecce AE |
226 | skb = skb_recv_datagram(sk, flags, noblock, &err); |
227 | if (!skb) { | |
f3d33426 | 228 | if (sk->sk_shutdown & RCV_SHUTDOWN) |
1da177e4 | 229 | return 0; |
f3d33426 | 230 | |
1da177e4 LT |
231 | return err; |
232 | } | |
233 | ||
b5f34f94 | 234 | skblen = skb->len; |
1da177e4 LT |
235 | copied = skb->len; |
236 | if (len < copied) { | |
237 | msg->msg_flags |= MSG_TRUNC; | |
238 | copied = len; | |
239 | } | |
240 | ||
badff6d0 | 241 | skb_reset_transport_header(skb); |
51f3d02b | 242 | err = skb_copy_datagram_msg(skb, 0, msg, copied); |
d9763698 | 243 | if (err == 0) { |
3b885787 | 244 | sock_recv_ts_and_drops(msg, sk, skb); |
1da177e4 | 245 | |
d9763698 MH |
246 | if (bt_sk(sk)->skb_msg_name) |
247 | bt_sk(sk)->skb_msg_name(skb, msg->msg_name, | |
248 | &msg->msg_namelen); | |
d9763698 MH |
249 | } |
250 | ||
1da177e4 LT |
251 | skb_free_datagram(sk, skb); |
252 | ||
90a56f72 | 253 | if (flags & MSG_TRUNC) |
b5f34f94 DK |
254 | copied = skblen; |
255 | ||
1da177e4 LT |
256 | return err ? : copied; |
257 | } | |
258 | EXPORT_SYMBOL(bt_sock_recvmsg); | |
259 | ||
796c86ee MM |
260 | static long bt_sock_data_wait(struct sock *sk, long timeo) |
261 | { | |
262 | DECLARE_WAITQUEUE(wait, current); | |
263 | ||
264 | add_wait_queue(sk_sleep(sk), &wait); | |
265 | for (;;) { | |
266 | set_current_state(TASK_INTERRUPTIBLE); | |
267 | ||
268 | if (!skb_queue_empty(&sk->sk_receive_queue)) | |
269 | break; | |
270 | ||
271 | if (sk->sk_err || (sk->sk_shutdown & RCV_SHUTDOWN)) | |
272 | break; | |
273 | ||
274 | if (signal_pending(current) || !timeo) | |
275 | break; | |
276 | ||
9cd3e072 | 277 | sk_set_bit(SOCKWQ_ASYNC_WAITDATA, sk); |
796c86ee MM |
278 | release_sock(sk); |
279 | timeo = schedule_timeout(timeo); | |
280 | lock_sock(sk); | |
9cd3e072 | 281 | sk_clear_bit(SOCKWQ_ASYNC_WAITDATA, sk); |
796c86ee MM |
282 | } |
283 | ||
284 | __set_current_state(TASK_RUNNING); | |
285 | remove_wait_queue(sk_sleep(sk), &wait); | |
286 | return timeo; | |
287 | } | |
288 | ||
1b784140 YX |
289 | int bt_sock_stream_recvmsg(struct socket *sock, struct msghdr *msg, |
290 | size_t size, int flags) | |
796c86ee MM |
291 | { |
292 | struct sock *sk = sock->sk; | |
293 | int err = 0; | |
294 | size_t target, copied = 0; | |
295 | long timeo; | |
296 | ||
297 | if (flags & MSG_OOB) | |
298 | return -EOPNOTSUPP; | |
299 | ||
796c86ee MM |
300 | BT_DBG("sk %p size %zu", sk, size); |
301 | ||
302 | lock_sock(sk); | |
303 | ||
304 | target = sock_rcvlowat(sk, flags & MSG_WAITALL, size); | |
305 | timeo = sock_rcvtimeo(sk, flags & MSG_DONTWAIT); | |
306 | ||
307 | do { | |
308 | struct sk_buff *skb; | |
309 | int chunk; | |
310 | ||
311 | skb = skb_dequeue(&sk->sk_receive_queue); | |
312 | if (!skb) { | |
313 | if (copied >= target) | |
314 | break; | |
315 | ||
5a08ecce AE |
316 | err = sock_error(sk); |
317 | if (err) | |
796c86ee MM |
318 | break; |
319 | if (sk->sk_shutdown & RCV_SHUTDOWN) | |
320 | break; | |
321 | ||
322 | err = -EAGAIN; | |
323 | if (!timeo) | |
324 | break; | |
325 | ||
326 | timeo = bt_sock_data_wait(sk, timeo); | |
327 | ||
328 | if (signal_pending(current)) { | |
329 | err = sock_intr_errno(timeo); | |
330 | goto out; | |
331 | } | |
332 | continue; | |
333 | } | |
334 | ||
335 | chunk = min_t(unsigned int, skb->len, size); | |
51f3d02b | 336 | if (skb_copy_datagram_msg(skb, 0, msg, chunk)) { |
796c86ee MM |
337 | skb_queue_head(&sk->sk_receive_queue, skb); |
338 | if (!copied) | |
339 | copied = -EFAULT; | |
340 | break; | |
341 | } | |
342 | copied += chunk; | |
343 | size -= chunk; | |
344 | ||
345 | sock_recv_ts_and_drops(msg, sk, skb); | |
346 | ||
347 | if (!(flags & MSG_PEEK)) { | |
5b668eb3 MM |
348 | int skb_len = skb_headlen(skb); |
349 | ||
350 | if (chunk <= skb_len) { | |
351 | __skb_pull(skb, chunk); | |
352 | } else { | |
353 | struct sk_buff *frag; | |
354 | ||
355 | __skb_pull(skb, skb_len); | |
356 | chunk -= skb_len; | |
357 | ||
358 | skb_walk_frags(skb, frag) { | |
359 | if (chunk <= frag->len) { | |
360 | /* Pulling partial data */ | |
361 | skb->len -= chunk; | |
362 | skb->data_len -= chunk; | |
363 | __skb_pull(frag, chunk); | |
364 | break; | |
365 | } else if (frag->len) { | |
366 | /* Pulling all frag data */ | |
367 | chunk -= frag->len; | |
368 | skb->len -= frag->len; | |
369 | skb->data_len -= frag->len; | |
370 | __skb_pull(frag, frag->len); | |
371 | } | |
372 | } | |
373 | } | |
374 | ||
796c86ee MM |
375 | if (skb->len) { |
376 | skb_queue_head(&sk->sk_receive_queue, skb); | |
377 | break; | |
378 | } | |
379 | kfree_skb(skb); | |
380 | ||
381 | } else { | |
382 | /* put message back and return */ | |
383 | skb_queue_head(&sk->sk_receive_queue, skb); | |
384 | break; | |
385 | } | |
386 | } while (size); | |
387 | ||
388 | out: | |
389 | release_sock(sk); | |
390 | return copied ? : err; | |
391 | } | |
392 | EXPORT_SYMBOL(bt_sock_stream_recvmsg); | |
393 | ||
1da177e4 LT |
394 | static inline unsigned int bt_accept_poll(struct sock *parent) |
395 | { | |
7eb7404f | 396 | struct bt_sock *s, *n; |
1da177e4 LT |
397 | struct sock *sk; |
398 | ||
7eb7404f GT |
399 | list_for_each_entry_safe(s, n, &bt_sk(parent)->accept_q, accept_q) { |
400 | sk = (struct sock *)s; | |
d5f2d2be | 401 | if (sk->sk_state == BT_CONNECTED || |
c5daa683 GP |
402 | (test_bit(BT_SK_DEFER_SETUP, &bt_sk(parent)->flags) && |
403 | sk->sk_state == BT_CONNECT2)) | |
1da177e4 LT |
404 | return POLLIN | POLLRDNORM; |
405 | } | |
406 | ||
407 | return 0; | |
408 | } | |
409 | ||
8fc9ced3 GP |
410 | unsigned int bt_sock_poll(struct file *file, struct socket *sock, |
411 | poll_table *wait) | |
1da177e4 LT |
412 | { |
413 | struct sock *sk = sock->sk; | |
414 | unsigned int mask = 0; | |
415 | ||
416 | BT_DBG("sock %p, sk %p", sock, sk); | |
417 | ||
aa395145 | 418 | poll_wait(file, sk_sleep(sk), wait); |
1da177e4 LT |
419 | |
420 | if (sk->sk_state == BT_LISTEN) | |
421 | return bt_accept_poll(sk); | |
422 | ||
423 | if (sk->sk_err || !skb_queue_empty(&sk->sk_error_queue)) | |
7d4c04fc | 424 | mask |= POLLERR | |
8facd5fb | 425 | (sock_flag(sk, SOCK_SELECT_ERR_QUEUE) ? POLLPRI : 0); |
1da177e4 | 426 | |
f348d70a | 427 | if (sk->sk_shutdown & RCV_SHUTDOWN) |
db40980f | 428 | mask |= POLLRDHUP | POLLIN | POLLRDNORM; |
f348d70a | 429 | |
1da177e4 LT |
430 | if (sk->sk_shutdown == SHUTDOWN_MASK) |
431 | mask |= POLLHUP; | |
432 | ||
db40980f | 433 | if (!skb_queue_empty(&sk->sk_receive_queue)) |
1da177e4 LT |
434 | mask |= POLLIN | POLLRDNORM; |
435 | ||
436 | if (sk->sk_state == BT_CLOSED) | |
437 | mask |= POLLHUP; | |
438 | ||
439 | if (sk->sk_state == BT_CONNECT || | |
440 | sk->sk_state == BT_CONNECT2 || | |
441 | sk->sk_state == BT_CONFIG) | |
442 | return mask; | |
443 | ||
c5daa683 | 444 | if (!test_bit(BT_SK_SUSPEND, &bt_sk(sk)->flags) && sock_writeable(sk)) |
1da177e4 LT |
445 | mask |= POLLOUT | POLLWRNORM | POLLWRBAND; |
446 | else | |
9cd3e072 | 447 | sk_set_bit(SOCKWQ_ASYNC_NOSPACE, sk); |
1da177e4 LT |
448 | |
449 | return mask; | |
450 | } | |
451 | EXPORT_SYMBOL(bt_sock_poll); | |
452 | ||
3241ad82 MH |
453 | int bt_sock_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg) |
454 | { | |
455 | struct sock *sk = sock->sk; | |
43cbeee9 MH |
456 | struct sk_buff *skb; |
457 | long amount; | |
3241ad82 MH |
458 | int err; |
459 | ||
460 | BT_DBG("sk %p cmd %x arg %lx", sk, cmd, arg); | |
461 | ||
462 | switch (cmd) { | |
43cbeee9 MH |
463 | case TIOCOUTQ: |
464 | if (sk->sk_state == BT_LISTEN) | |
465 | return -EINVAL; | |
466 | ||
31e6d363 | 467 | amount = sk->sk_sndbuf - sk_wmem_alloc_get(sk); |
43cbeee9 MH |
468 | if (amount < 0) |
469 | amount = 0; | |
470 | err = put_user(amount, (int __user *) arg); | |
471 | break; | |
472 | ||
473 | case TIOCINQ: | |
474 | if (sk->sk_state == BT_LISTEN) | |
475 | return -EINVAL; | |
476 | ||
477 | lock_sock(sk); | |
478 | skb = skb_peek(&sk->sk_receive_queue); | |
479 | amount = skb ? skb->len : 0; | |
480 | release_sock(sk); | |
481 | err = put_user(amount, (int __user *) arg); | |
482 | break; | |
483 | ||
3241ad82 MH |
484 | case SIOCGSTAMP: |
485 | err = sock_get_timestamp(sk, (struct timeval __user *) arg); | |
486 | break; | |
487 | ||
488 | case SIOCGSTAMPNS: | |
489 | err = sock_get_timestampns(sk, (struct timespec __user *) arg); | |
490 | break; | |
491 | ||
492 | default: | |
493 | err = -ENOIOCTLCMD; | |
494 | break; | |
495 | } | |
496 | ||
497 | return err; | |
498 | } | |
499 | EXPORT_SYMBOL(bt_sock_ioctl); | |
500 | ||
0fba96f9 | 501 | /* This function expects the sk lock to be held when called */ |
1da177e4 LT |
502 | int bt_sock_wait_state(struct sock *sk, int state, unsigned long timeo) |
503 | { | |
504 | DECLARE_WAITQUEUE(wait, current); | |
505 | int err = 0; | |
506 | ||
507 | BT_DBG("sk %p", sk); | |
508 | ||
aa395145 | 509 | add_wait_queue(sk_sleep(sk), &wait); |
9be4e3fb | 510 | set_current_state(TASK_INTERRUPTIBLE); |
1da177e4 | 511 | while (sk->sk_state != state) { |
1da177e4 | 512 | if (!timeo) { |
b4c612a4 | 513 | err = -EINPROGRESS; |
1da177e4 LT |
514 | break; |
515 | } | |
516 | ||
517 | if (signal_pending(current)) { | |
518 | err = sock_intr_errno(timeo); | |
519 | break; | |
520 | } | |
521 | ||
522 | release_sock(sk); | |
523 | timeo = schedule_timeout(timeo); | |
524 | lock_sock(sk); | |
9be4e3fb | 525 | set_current_state(TASK_INTERRUPTIBLE); |
1da177e4 | 526 | |
c1cbe4b7 BL |
527 | err = sock_error(sk); |
528 | if (err) | |
1da177e4 | 529 | break; |
1da177e4 | 530 | } |
9be4e3fb | 531 | __set_current_state(TASK_RUNNING); |
aa395145 | 532 | remove_wait_queue(sk_sleep(sk), &wait); |
1da177e4 LT |
533 | return err; |
534 | } | |
535 | EXPORT_SYMBOL(bt_sock_wait_state); | |
536 | ||
e793dcf0 JH |
537 | /* This function expects the sk lock to be held when called */ |
538 | int bt_sock_wait_ready(struct sock *sk, unsigned long flags) | |
539 | { | |
540 | DECLARE_WAITQUEUE(wait, current); | |
541 | unsigned long timeo; | |
542 | int err = 0; | |
543 | ||
544 | BT_DBG("sk %p", sk); | |
545 | ||
546 | timeo = sock_sndtimeo(sk, flags & O_NONBLOCK); | |
547 | ||
548 | add_wait_queue(sk_sleep(sk), &wait); | |
549 | set_current_state(TASK_INTERRUPTIBLE); | |
550 | while (test_bit(BT_SK_SUSPEND, &bt_sk(sk)->flags)) { | |
551 | if (!timeo) { | |
552 | err = -EAGAIN; | |
553 | break; | |
554 | } | |
555 | ||
556 | if (signal_pending(current)) { | |
557 | err = sock_intr_errno(timeo); | |
558 | break; | |
559 | } | |
560 | ||
561 | release_sock(sk); | |
562 | timeo = schedule_timeout(timeo); | |
563 | lock_sock(sk); | |
564 | set_current_state(TASK_INTERRUPTIBLE); | |
565 | ||
566 | err = sock_error(sk); | |
567 | if (err) | |
568 | break; | |
569 | } | |
570 | __set_current_state(TASK_RUNNING); | |
571 | remove_wait_queue(sk_sleep(sk), &wait); | |
572 | ||
573 | return err; | |
574 | } | |
575 | EXPORT_SYMBOL(bt_sock_wait_ready); | |
576 | ||
256a06c8 MY |
577 | #ifdef CONFIG_PROC_FS |
578 | struct bt_seq_state { | |
579 | struct bt_sock_list *l; | |
580 | }; | |
581 | ||
582 | static void *bt_seq_start(struct seq_file *seq, loff_t *pos) | |
583 | __acquires(seq->private->l->lock) | |
584 | { | |
585 | struct bt_seq_state *s = seq->private; | |
586 | struct bt_sock_list *l = s->l; | |
587 | ||
588 | read_lock(&l->lock); | |
589 | return seq_hlist_start_head(&l->head, *pos); | |
590 | } | |
591 | ||
592 | static void *bt_seq_next(struct seq_file *seq, void *v, loff_t *pos) | |
593 | { | |
594 | struct bt_seq_state *s = seq->private; | |
595 | struct bt_sock_list *l = s->l; | |
596 | ||
597 | return seq_hlist_next(v, &l->head, pos); | |
598 | } | |
599 | ||
600 | static void bt_seq_stop(struct seq_file *seq, void *v) | |
601 | __releases(seq->private->l->lock) | |
602 | { | |
603 | struct bt_seq_state *s = seq->private; | |
604 | struct bt_sock_list *l = s->l; | |
605 | ||
606 | read_unlock(&l->lock); | |
607 | } | |
608 | ||
609 | static int bt_seq_show(struct seq_file *seq, void *v) | |
610 | { | |
256a06c8 MY |
611 | struct bt_seq_state *s = seq->private; |
612 | struct bt_sock_list *l = s->l; | |
256a06c8 MY |
613 | |
614 | if (v == SEQ_START_TOKEN) { | |
c5605755 | 615 | seq_puts(seq ,"sk RefCnt Rmem Wmem User Inode Parent"); |
256a06c8 MY |
616 | |
617 | if (l->custom_seq_show) { | |
618 | seq_putc(seq, ' '); | |
619 | l->custom_seq_show(seq, v); | |
620 | } | |
621 | ||
622 | seq_putc(seq, '\n'); | |
623 | } else { | |
09d5d4aa AE |
624 | struct sock *sk = sk_entry(v); |
625 | struct bt_sock *bt = bt_sk(sk); | |
256a06c8 | 626 | |
7028a886 | 627 | seq_printf(seq, |
5f6cd79f | 628 | "%pK %-6d %-6u %-6u %-6u %-6lu %-6lu", |
256a06c8 MY |
629 | sk, |
630 | atomic_read(&sk->sk_refcnt), | |
631 | sk_rmem_alloc_get(sk), | |
632 | sk_wmem_alloc_get(sk), | |
1bbb3095 | 633 | from_kuid(seq_user_ns(seq), sock_i_uid(sk)), |
256a06c8 | 634 | sock_i_ino(sk), |
256a06c8 MY |
635 | bt->parent? sock_i_ino(bt->parent): 0LU); |
636 | ||
637 | if (l->custom_seq_show) { | |
638 | seq_putc(seq, ' '); | |
639 | l->custom_seq_show(seq, v); | |
640 | } | |
641 | ||
642 | seq_putc(seq, '\n'); | |
643 | } | |
644 | return 0; | |
645 | } | |
646 | ||
26b0f4e2 | 647 | static const struct seq_operations bt_seq_ops = { |
256a06c8 MY |
648 | .start = bt_seq_start, |
649 | .next = bt_seq_next, | |
650 | .stop = bt_seq_stop, | |
651 | .show = bt_seq_show, | |
652 | }; | |
653 | ||
654 | static int bt_seq_open(struct inode *inode, struct file *file) | |
655 | { | |
656 | struct bt_sock_list *sk_list; | |
657 | struct bt_seq_state *s; | |
658 | ||
d9dda78b | 659 | sk_list = PDE_DATA(inode); |
256a06c8 MY |
660 | s = __seq_open_private(file, &bt_seq_ops, |
661 | sizeof(struct bt_seq_state)); | |
31f47073 | 662 | if (!s) |
256a06c8 MY |
663 | return -ENOMEM; |
664 | ||
665 | s->l = sk_list; | |
666 | return 0; | |
667 | } | |
668 | ||
14805359 AV |
669 | static const struct file_operations bt_fops = { |
670 | .open = bt_seq_open, | |
671 | .read = seq_read, | |
672 | .llseek = seq_lseek, | |
673 | .release = seq_release_private | |
674 | }; | |
675 | ||
b0316615 | 676 | int bt_procfs_init(struct net *net, const char *name, |
f37590bd | 677 | struct bt_sock_list *sk_list, |
256a06c8 MY |
678 | int (* seq_show)(struct seq_file *, void *)) |
679 | { | |
256a06c8 MY |
680 | sk_list->custom_seq_show = seq_show; |
681 | ||
4d006263 | 682 | if (!proc_create_data(name, 0, net->proc_net, &bt_fops, sk_list)) |
256a06c8 | 683 | return -ENOMEM; |
256a06c8 MY |
684 | return 0; |
685 | } | |
686 | ||
687 | void bt_procfs_cleanup(struct net *net, const char *name) | |
688 | { | |
ece31ffd | 689 | remove_proc_entry(name, net->proc_net); |
256a06c8 MY |
690 | } |
691 | #else | |
b0316615 | 692 | int bt_procfs_init(struct net *net, const char *name, |
f37590bd | 693 | struct bt_sock_list *sk_list, |
256a06c8 MY |
694 | int (* seq_show)(struct seq_file *, void *)) |
695 | { | |
696 | return 0; | |
697 | } | |
698 | ||
699 | void bt_procfs_cleanup(struct net *net, const char *name) | |
700 | { | |
701 | } | |
702 | #endif | |
703 | EXPORT_SYMBOL(bt_procfs_init); | |
704 | EXPORT_SYMBOL(bt_procfs_cleanup); | |
705 | ||
1da177e4 LT |
706 | static struct net_proto_family bt_sock_family_ops = { |
707 | .owner = THIS_MODULE, | |
708 | .family = PF_BLUETOOTH, | |
709 | .create = bt_sock_create, | |
710 | }; | |
711 | ||
ffcecac6 MH |
712 | struct dentry *bt_debugfs; |
713 | EXPORT_SYMBOL_GPL(bt_debugfs); | |
714 | ||
1da177e4 LT |
715 | static int __init bt_init(void) |
716 | { | |
27d35284 MH |
717 | int err; |
718 | ||
b4772ef8 | 719 | sock_skb_cb_check_size(sizeof(struct bt_skb_cb)); |
7cb9d20f | 720 | |
dd31506d | 721 | BT_INFO("Core ver %s", BT_SUBSYS_VERSION); |
1da177e4 | 722 | |
ee485290 MH |
723 | err = bt_selftest(); |
724 | if (err < 0) | |
725 | return err; | |
726 | ||
ffcecac6 MH |
727 | bt_debugfs = debugfs_create_dir("bluetooth", NULL); |
728 | ||
27d35284 MH |
729 | err = bt_sysfs_init(); |
730 | if (err < 0) | |
731 | return err; | |
1da177e4 | 732 | |
27d35284 MH |
733 | err = sock_register(&bt_sock_family_ops); |
734 | if (err < 0) { | |
735 | bt_sysfs_cleanup(); | |
736 | return err; | |
737 | } | |
1da177e4 | 738 | |
27d35284 | 739 | BT_INFO("HCI device and connection manager initialized"); |
1da177e4 | 740 | |
64274518 GP |
741 | err = hci_sock_init(); |
742 | if (err < 0) | |
743 | goto error; | |
744 | ||
745 | err = l2cap_init(); | |
0ed54dad | 746 | if (err < 0) |
64274518 | 747 | goto sock_err; |
64274518 GP |
748 | |
749 | err = sco_init(); | |
750 | if (err < 0) { | |
751 | l2cap_exit(); | |
752 | goto sock_err; | |
753 | } | |
1da177e4 | 754 | |
6d785aa3 JH |
755 | err = mgmt_init(); |
756 | if (err < 0) { | |
757 | sco_exit(); | |
758 | l2cap_exit(); | |
759 | goto sock_err; | |
760 | } | |
761 | ||
1da177e4 | 762 | return 0; |
64274518 GP |
763 | |
764 | sock_err: | |
765 | hci_sock_cleanup(); | |
766 | ||
767 | error: | |
768 | sock_unregister(PF_BLUETOOTH); | |
769 | bt_sysfs_cleanup(); | |
770 | ||
771 | return err; | |
1da177e4 LT |
772 | } |
773 | ||
774 | static void __exit bt_exit(void) | |
775 | { | |
6d785aa3 JH |
776 | mgmt_exit(); |
777 | ||
64274518 GP |
778 | sco_exit(); |
779 | ||
780 | l2cap_exit(); | |
781 | ||
1da177e4 LT |
782 | hci_sock_cleanup(); |
783 | ||
1da177e4 | 784 | sock_unregister(PF_BLUETOOTH); |
27d35284 MH |
785 | |
786 | bt_sysfs_cleanup(); | |
ffcecac6 MH |
787 | |
788 | debugfs_remove_recursive(bt_debugfs); | |
1da177e4 LT |
789 | } |
790 | ||
791 | subsys_initcall(bt_init); | |
792 | module_exit(bt_exit); | |
793 | ||
63fbd24e | 794 | MODULE_AUTHOR("Marcel Holtmann <marcel@holtmann.org>"); |
dd31506d MH |
795 | MODULE_DESCRIPTION("Bluetooth Core ver " BT_SUBSYS_VERSION); |
796 | MODULE_VERSION(BT_SUBSYS_VERSION); | |
1da177e4 LT |
797 | MODULE_LICENSE("GPL"); |
798 | MODULE_ALIAS_NETPROTO(PF_BLUETOOTH); |