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Commit | Line | Data |
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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> |
9e8305b3 | 29 | #include <linux/stringify.h> |
174cd4b1 IM |
30 | #include <linux/sched/signal.h> |
31 | ||
3241ad82 | 32 | #include <asm/ioctls.h> |
1da177e4 LT |
33 | |
34 | #include <net/bluetooth/bluetooth.h> | |
256a06c8 | 35 | #include <linux/proc_fs.h> |
1da177e4 | 36 | |
e64c97b5 | 37 | #include "leds.h" |
ee485290 MH |
38 | #include "selftest.h" |
39 | ||
1da177e4 LT |
40 | /* Bluetooth sockets */ |
41 | #define BT_MAX_PROTO 8 | |
ec1b4cf7 | 42 | static const struct net_proto_family *bt_proto[BT_MAX_PROTO]; |
db7aa1c2 | 43 | static DEFINE_RWLOCK(bt_proto_lock); |
68845cb2 | 44 | |
68845cb2 | 45 | static struct lock_class_key bt_lock_key[BT_MAX_PROTO]; |
36cbd3dc | 46 | static const char *const bt_key_strings[BT_MAX_PROTO] = { |
68845cb2 DY |
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 | ||
db7aa1c2 | 57 | static struct lock_class_key bt_slock_key[BT_MAX_PROTO]; |
36cbd3dc | 58 | static const char *const bt_slock_key_strings[BT_MAX_PROTO] = { |
68845cb2 DY |
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 | }; | |
db7aa1c2 | 68 | |
b5a30dda | 69 | void bt_sock_reclassify_lock(struct sock *sk, int proto) |
db7aa1c2 | 70 | { |
b5a30dda | 71 | BUG_ON(!sk); |
fafc4e1e | 72 | BUG_ON(!sock_allow_reclassification(sk)); |
db7aa1c2 MH |
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 | } | |
b5a30dda | 78 | EXPORT_SYMBOL(bt_sock_reclassify_lock); |
1da177e4 | 79 | |
ec1b4cf7 | 80 | int bt_sock_register(int proto, const struct net_proto_family *ops) |
1da177e4 | 81 | { |
74da626a MH |
82 | int err = 0; |
83 | ||
1da177e4 LT |
84 | if (proto < 0 || proto >= BT_MAX_PROTO) |
85 | return -EINVAL; | |
86 | ||
74da626a MH |
87 | write_lock(&bt_proto_lock); |
88 | ||
1da177e4 | 89 | if (bt_proto[proto]) |
74da626a MH |
90 | err = -EEXIST; |
91 | else | |
92 | bt_proto[proto] = ops; | |
93 | ||
94 | write_unlock(&bt_proto_lock); | |
1da177e4 | 95 | |
74da626a | 96 | return err; |
1da177e4 LT |
97 | } |
98 | EXPORT_SYMBOL(bt_sock_register); | |
99 | ||
be9f97f0 | 100 | void bt_sock_unregister(int proto) |
1da177e4 LT |
101 | { |
102 | if (proto < 0 || proto >= BT_MAX_PROTO) | |
be9f97f0 | 103 | return; |
1da177e4 | 104 | |
74da626a | 105 | write_lock(&bt_proto_lock); |
be9f97f0 | 106 | bt_proto[proto] = NULL; |
74da626a | 107 | write_unlock(&bt_proto_lock); |
1da177e4 LT |
108 | } |
109 | EXPORT_SYMBOL(bt_sock_unregister); | |
110 | ||
3f378b68 EP |
111 | static int bt_sock_create(struct net *net, struct socket *sock, int proto, |
112 | int kern) | |
1da177e4 | 113 | { |
74da626a | 114 | int err; |
1da177e4 | 115 | |
1b8d7ae4 EB |
116 | if (net != &init_net) |
117 | return -EAFNOSUPPORT; | |
118 | ||
1da177e4 LT |
119 | if (proto < 0 || proto >= BT_MAX_PROTO) |
120 | return -EINVAL; | |
121 | ||
95a5afca | 122 | if (!bt_proto[proto]) |
1da177e4 | 123 | request_module("bt-proto-%d", proto); |
74da626a | 124 | |
1da177e4 | 125 | err = -EPROTONOSUPPORT; |
74da626a MH |
126 | |
127 | read_lock(&bt_proto_lock); | |
128 | ||
1da177e4 | 129 | if (bt_proto[proto] && try_module_get(bt_proto[proto]->owner)) { |
3f378b68 | 130 | err = bt_proto[proto]->create(net, sock, proto, kern); |
b5a30dda OP |
131 | if (!err) |
132 | bt_sock_reclassify_lock(sock->sk, proto); | |
1da177e4 LT |
133 | module_put(bt_proto[proto]->owner); |
134 | } | |
74da626a MH |
135 | |
136 | read_unlock(&bt_proto_lock); | |
137 | ||
8e87d142 | 138 | return err; |
1da177e4 LT |
139 | } |
140 | ||
141 | void bt_sock_link(struct bt_sock_list *l, struct sock *sk) | |
142 | { | |
94f5bfb8 | 143 | write_lock(&l->lock); |
1da177e4 | 144 | sk_add_node(sk, &l->head); |
94f5bfb8 | 145 | write_unlock(&l->lock); |
1da177e4 LT |
146 | } |
147 | EXPORT_SYMBOL(bt_sock_link); | |
148 | ||
149 | void bt_sock_unlink(struct bt_sock_list *l, struct sock *sk) | |
150 | { | |
94f5bfb8 | 151 | write_lock(&l->lock); |
1da177e4 | 152 | sk_del_node_init(sk); |
94f5bfb8 | 153 | write_unlock(&l->lock); |
1da177e4 LT |
154 | } |
155 | EXPORT_SYMBOL(bt_sock_unlink); | |
156 | ||
a60ccf97 | 157 | void bt_accept_enqueue(struct sock *parent, struct sock *sk, bool bh) |
1da177e4 LT |
158 | { |
159 | BT_DBG("parent %p, sk %p", parent, sk); | |
160 | ||
161 | sock_hold(sk); | |
a60ccf97 MK |
162 | |
163 | if (bh) | |
164 | bh_lock_sock_nested(sk); | |
165 | else | |
166 | lock_sock_nested(sk, SINGLE_DEPTH_NESTING); | |
167 | ||
1da177e4 LT |
168 | list_add_tail(&bt_sk(sk)->accept_q, &bt_sk(parent)->accept_q); |
169 | bt_sk(sk)->parent = parent; | |
a60ccf97 MK |
170 | |
171 | if (bh) | |
172 | bh_unlock_sock(sk); | |
173 | else | |
174 | release_sock(sk); | |
175 | ||
1da177e4 LT |
176 | parent->sk_ack_backlog++; |
177 | } | |
178 | EXPORT_SYMBOL(bt_accept_enqueue); | |
179 | ||
27bfbc21 DJ |
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 | */ | |
1da177e4 LT |
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 | { | |
7eb7404f | 196 | struct bt_sock *s, *n; |
1da177e4 LT |
197 | struct sock *sk; |
198 | ||
199 | BT_DBG("parent %p", parent); | |
200 | ||
27bfbc21 | 201 | restart: |
7eb7404f GT |
202 | list_for_each_entry_safe(s, n, &bt_sk(parent)->accept_q, accept_q) { |
203 | sk = (struct sock *)s; | |
1da177e4 | 204 | |
27bfbc21 DJ |
205 | /* Prevent early freeing of sk due to unlink and sock_kill */ |
206 | sock_hold(sk); | |
8a154a8f | 207 | lock_sock(sk); |
1da177e4 | 208 | |
27bfbc21 DJ |
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 | ||
1da177e4 LT |
227 | /* FIXME: Is this check still needed */ |
228 | if (sk->sk_state == BT_CLOSED) { | |
1da177e4 | 229 | bt_accept_unlink(sk); |
1a11ec89 | 230 | release_sock(sk); |
1da177e4 LT |
231 | continue; |
232 | } | |
233 | ||
c4f912e1 | 234 | if (sk->sk_state == BT_CONNECTED || !newsock || |
d060991f | 235 | test_bit(BT_SK_DEFER_SETUP, &bt_sk(parent)->flags)) { |
1da177e4 LT |
236 | bt_accept_unlink(sk); |
237 | if (newsock) | |
238 | sock_graft(sk, newsock); | |
d37f50e1 | 239 | |
8a154a8f | 240 | release_sock(sk); |
1da177e4 LT |
241 | return sk; |
242 | } | |
243 | ||
8a154a8f | 244 | release_sock(sk); |
1da177e4 | 245 | } |
d37f50e1 | 246 | |
1da177e4 LT |
247 | return NULL; |
248 | } | |
249 | EXPORT_SYMBOL(bt_accept_dequeue); | |
250 | ||
1b784140 YX |
251 | int bt_sock_recvmsg(struct socket *sock, struct msghdr *msg, size_t len, |
252 | int flags) | |
1da177e4 LT |
253 | { |
254 | int noblock = flags & MSG_DONTWAIT; | |
255 | struct sock *sk = sock->sk; | |
256 | struct sk_buff *skb; | |
257 | size_t copied; | |
b5f34f94 | 258 | size_t skblen; |
1da177e4 LT |
259 | int err; |
260 | ||
a418b893 | 261 | BT_DBG("sock %p sk %p len %zu", sock, sk, len); |
1da177e4 | 262 | |
d94a6104 | 263 | if (flags & MSG_OOB) |
1da177e4 LT |
264 | return -EOPNOTSUPP; |
265 | ||
5a08ecce AE |
266 | skb = skb_recv_datagram(sk, flags, noblock, &err); |
267 | if (!skb) { | |
f3d33426 | 268 | if (sk->sk_shutdown & RCV_SHUTDOWN) |
1da177e4 | 269 | return 0; |
f3d33426 | 270 | |
1da177e4 LT |
271 | return err; |
272 | } | |
273 | ||
b5f34f94 | 274 | skblen = skb->len; |
1da177e4 LT |
275 | copied = skb->len; |
276 | if (len < copied) { | |
277 | msg->msg_flags |= MSG_TRUNC; | |
278 | copied = len; | |
279 | } | |
280 | ||
badff6d0 | 281 | skb_reset_transport_header(skb); |
51f3d02b | 282 | err = skb_copy_datagram_msg(skb, 0, msg, copied); |
d9763698 | 283 | if (err == 0) { |
3b885787 | 284 | sock_recv_ts_and_drops(msg, sk, skb); |
1da177e4 | 285 | |
9dcbc313 | 286 | if (msg->msg_name && bt_sk(sk)->skb_msg_name) |
d9763698 MH |
287 | bt_sk(sk)->skb_msg_name(skb, msg->msg_name, |
288 | &msg->msg_namelen); | |
d9763698 MH |
289 | } |
290 | ||
1da177e4 LT |
291 | skb_free_datagram(sk, skb); |
292 | ||
90a56f72 | 293 | if (flags & MSG_TRUNC) |
b5f34f94 DK |
294 | copied = skblen; |
295 | ||
1da177e4 LT |
296 | return err ? : copied; |
297 | } | |
298 | EXPORT_SYMBOL(bt_sock_recvmsg); | |
299 | ||
796c86ee MM |
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 | ||
9cd3e072 | 317 | sk_set_bit(SOCKWQ_ASYNC_WAITDATA, sk); |
796c86ee MM |
318 | release_sock(sk); |
319 | timeo = schedule_timeout(timeo); | |
320 | lock_sock(sk); | |
9cd3e072 | 321 | sk_clear_bit(SOCKWQ_ASYNC_WAITDATA, sk); |
796c86ee MM |
322 | } |
323 | ||
324 | __set_current_state(TASK_RUNNING); | |
325 | remove_wait_queue(sk_sleep(sk), &wait); | |
326 | return timeo; | |
327 | } | |
328 | ||
1b784140 YX |
329 | int bt_sock_stream_recvmsg(struct socket *sock, struct msghdr *msg, |
330 | size_t size, int flags) | |
796c86ee MM |
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 | ||
796c86ee MM |
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 | ||
5a08ecce AE |
356 | err = sock_error(sk); |
357 | if (err) | |
796c86ee MM |
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); | |
51f3d02b | 376 | if (skb_copy_datagram_msg(skb, 0, msg, chunk)) { |
796c86ee MM |
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)) { | |
5b668eb3 MM |
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 | ||
796c86ee MM |
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 | ||
1da177e4 LT |
434 | static inline unsigned int bt_accept_poll(struct sock *parent) |
435 | { | |
7eb7404f | 436 | struct bt_sock *s, *n; |
1da177e4 LT |
437 | struct sock *sk; |
438 | ||
7eb7404f GT |
439 | list_for_each_entry_safe(s, n, &bt_sk(parent)->accept_q, accept_q) { |
440 | sk = (struct sock *)s; | |
d5f2d2be | 441 | if (sk->sk_state == BT_CONNECTED || |
c5daa683 GP |
442 | (test_bit(BT_SK_DEFER_SETUP, &bt_sk(parent)->flags) && |
443 | sk->sk_state == BT_CONNECT2)) | |
1da177e4 LT |
444 | return POLLIN | POLLRDNORM; |
445 | } | |
446 | ||
447 | return 0; | |
448 | } | |
449 | ||
8fc9ced3 GP |
450 | unsigned int bt_sock_poll(struct file *file, struct socket *sock, |
451 | poll_table *wait) | |
1da177e4 LT |
452 | { |
453 | struct sock *sk = sock->sk; | |
454 | unsigned int mask = 0; | |
455 | ||
456 | BT_DBG("sock %p, sk %p", sock, sk); | |
457 | ||
aa395145 | 458 | poll_wait(file, sk_sleep(sk), wait); |
1da177e4 LT |
459 | |
460 | if (sk->sk_state == BT_LISTEN) | |
461 | return bt_accept_poll(sk); | |
462 | ||
09f6676b | 463 | if (sk->sk_err || !skb_queue_empty_lockless(&sk->sk_error_queue)) |
7d4c04fc | 464 | mask |= POLLERR | |
8facd5fb | 465 | (sock_flag(sk, SOCK_SELECT_ERR_QUEUE) ? POLLPRI : 0); |
1da177e4 | 466 | |
f348d70a | 467 | if (sk->sk_shutdown & RCV_SHUTDOWN) |
db40980f | 468 | mask |= POLLRDHUP | POLLIN | POLLRDNORM; |
f348d70a | 469 | |
1da177e4 LT |
470 | if (sk->sk_shutdown == SHUTDOWN_MASK) |
471 | mask |= POLLHUP; | |
472 | ||
09f6676b | 473 | if (!skb_queue_empty_lockless(&sk->sk_receive_queue)) |
1da177e4 LT |
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 | ||
c5daa683 | 484 | if (!test_bit(BT_SK_SUSPEND, &bt_sk(sk)->flags) && sock_writeable(sk)) |
1da177e4 LT |
485 | mask |= POLLOUT | POLLWRNORM | POLLWRBAND; |
486 | else | |
9cd3e072 | 487 | sk_set_bit(SOCKWQ_ASYNC_NOSPACE, sk); |
1da177e4 LT |
488 | |
489 | return mask; | |
490 | } | |
491 | EXPORT_SYMBOL(bt_sock_poll); | |
492 | ||
3241ad82 MH |
493 | int bt_sock_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg) |
494 | { | |
495 | struct sock *sk = sock->sk; | |
43cbeee9 MH |
496 | struct sk_buff *skb; |
497 | long amount; | |
3241ad82 MH |
498 | int err; |
499 | ||
500 | BT_DBG("sk %p cmd %x arg %lx", sk, cmd, arg); | |
501 | ||
502 | switch (cmd) { | |
43cbeee9 MH |
503 | case TIOCOUTQ: |
504 | if (sk->sk_state == BT_LISTEN) | |
505 | return -EINVAL; | |
506 | ||
31e6d363 | 507 | amount = sk->sk_sndbuf - sk_wmem_alloc_get(sk); |
43cbeee9 MH |
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 | ||
3241ad82 MH |
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 | ||
0fba96f9 | 541 | /* This function expects the sk lock to be held when called */ |
1da177e4 LT |
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 | ||
aa395145 | 549 | add_wait_queue(sk_sleep(sk), &wait); |
9be4e3fb | 550 | set_current_state(TASK_INTERRUPTIBLE); |
1da177e4 | 551 | while (sk->sk_state != state) { |
1da177e4 | 552 | if (!timeo) { |
b4c612a4 | 553 | err = -EINPROGRESS; |
1da177e4 LT |
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); | |
9be4e3fb | 565 | set_current_state(TASK_INTERRUPTIBLE); |
1da177e4 | 566 | |
c1cbe4b7 BL |
567 | err = sock_error(sk); |
568 | if (err) | |
1da177e4 | 569 | break; |
1da177e4 | 570 | } |
9be4e3fb | 571 | __set_current_state(TASK_RUNNING); |
aa395145 | 572 | remove_wait_queue(sk_sleep(sk), &wait); |
1da177e4 LT |
573 | return err; |
574 | } | |
575 | EXPORT_SYMBOL(bt_sock_wait_state); | |
576 | ||
e793dcf0 JH |
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 | ||
256a06c8 MY |
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 | { | |
256a06c8 MY |
651 | struct bt_seq_state *s = seq->private; |
652 | struct bt_sock_list *l = s->l; | |
256a06c8 MY |
653 | |
654 | if (v == SEQ_START_TOKEN) { | |
c5605755 | 655 | seq_puts(seq ,"sk RefCnt Rmem Wmem User Inode Parent"); |
256a06c8 MY |
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 { | |
09d5d4aa AE |
664 | struct sock *sk = sk_entry(v); |
665 | struct bt_sock *bt = bt_sk(sk); | |
256a06c8 | 666 | |
7028a886 | 667 | seq_printf(seq, |
5f6cd79f | 668 | "%pK %-6d %-6u %-6u %-6u %-6lu %-6lu", |
256a06c8 | 669 | sk, |
41c6d650 | 670 | refcount_read(&sk->sk_refcnt), |
256a06c8 MY |
671 | sk_rmem_alloc_get(sk), |
672 | sk_wmem_alloc_get(sk), | |
1bbb3095 | 673 | from_kuid(seq_user_ns(seq), sock_i_uid(sk)), |
256a06c8 | 674 | sock_i_ino(sk), |
256a06c8 MY |
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 | ||
26b0f4e2 | 687 | static const struct seq_operations bt_seq_ops = { |
256a06c8 MY |
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 | ||
d9dda78b | 699 | sk_list = PDE_DATA(inode); |
256a06c8 MY |
700 | s = __seq_open_private(file, &bt_seq_ops, |
701 | sizeof(struct bt_seq_state)); | |
31f47073 | 702 | if (!s) |
256a06c8 MY |
703 | return -ENOMEM; |
704 | ||
705 | s->l = sk_list; | |
706 | return 0; | |
707 | } | |
708 | ||
14805359 AV |
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 | ||
b0316615 | 716 | int bt_procfs_init(struct net *net, const char *name, |
f37590bd | 717 | struct bt_sock_list *sk_list, |
256a06c8 MY |
718 | int (* seq_show)(struct seq_file *, void *)) |
719 | { | |
256a06c8 MY |
720 | sk_list->custom_seq_show = seq_show; |
721 | ||
4d006263 | 722 | if (!proc_create_data(name, 0, net->proc_net, &bt_fops, sk_list)) |
256a06c8 | 723 | return -ENOMEM; |
256a06c8 MY |
724 | return 0; |
725 | } | |
726 | ||
727 | void bt_procfs_cleanup(struct net *net, const char *name) | |
728 | { | |
ece31ffd | 729 | remove_proc_entry(name, net->proc_net); |
256a06c8 MY |
730 | } |
731 | #else | |
b0316615 | 732 | int bt_procfs_init(struct net *net, const char *name, |
f37590bd | 733 | struct bt_sock_list *sk_list, |
256a06c8 MY |
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 | ||
173e7837 | 746 | static const struct net_proto_family bt_sock_family_ops = { |
1da177e4 LT |
747 | .owner = THIS_MODULE, |
748 | .family = PF_BLUETOOTH, | |
749 | .create = bt_sock_create, | |
750 | }; | |
751 | ||
ffcecac6 MH |
752 | struct dentry *bt_debugfs; |
753 | EXPORT_SYMBOL_GPL(bt_debugfs); | |
754 | ||
9e8305b3 MH |
755 | #define VERSION __stringify(BT_SUBSYS_VERSION) "." \ |
756 | __stringify(BT_SUBSYS_REVISION) | |
757 | ||
1da177e4 LT |
758 | static int __init bt_init(void) |
759 | { | |
27d35284 MH |
760 | int err; |
761 | ||
b4772ef8 | 762 | sock_skb_cb_check_size(sizeof(struct bt_skb_cb)); |
7cb9d20f | 763 | |
9e8305b3 | 764 | BT_INFO("Core ver %s", VERSION); |
1da177e4 | 765 | |
ee485290 MH |
766 | err = bt_selftest(); |
767 | if (err < 0) | |
768 | return err; | |
769 | ||
ffcecac6 MH |
770 | bt_debugfs = debugfs_create_dir("bluetooth", NULL); |
771 | ||
e64c97b5 MH |
772 | bt_leds_init(); |
773 | ||
27d35284 MH |
774 | err = bt_sysfs_init(); |
775 | if (err < 0) | |
776 | return err; | |
1da177e4 | 777 | |
27d35284 MH |
778 | err = sock_register(&bt_sock_family_ops); |
779 | if (err < 0) { | |
780 | bt_sysfs_cleanup(); | |
781 | return err; | |
782 | } | |
1da177e4 | 783 | |
27d35284 | 784 | BT_INFO("HCI device and connection manager initialized"); |
1da177e4 | 785 | |
64274518 GP |
786 | err = hci_sock_init(); |
787 | if (err < 0) | |
788 | goto error; | |
789 | ||
790 | err = l2cap_init(); | |
0ed54dad | 791 | if (err < 0) |
64274518 | 792 | goto sock_err; |
64274518 GP |
793 | |
794 | err = sco_init(); | |
795 | if (err < 0) { | |
796 | l2cap_exit(); | |
797 | goto sock_err; | |
798 | } | |
1da177e4 | 799 | |
6d785aa3 JH |
800 | err = mgmt_init(); |
801 | if (err < 0) { | |
802 | sco_exit(); | |
803 | l2cap_exit(); | |
804 | goto sock_err; | |
805 | } | |
806 | ||
1da177e4 | 807 | return 0; |
64274518 GP |
808 | |
809 | sock_err: | |
810 | hci_sock_cleanup(); | |
811 | ||
812 | error: | |
813 | sock_unregister(PF_BLUETOOTH); | |
814 | bt_sysfs_cleanup(); | |
815 | ||
816 | return err; | |
1da177e4 LT |
817 | } |
818 | ||
819 | static void __exit bt_exit(void) | |
820 | { | |
6d785aa3 JH |
821 | mgmt_exit(); |
822 | ||
64274518 GP |
823 | sco_exit(); |
824 | ||
825 | l2cap_exit(); | |
826 | ||
1da177e4 LT |
827 | hci_sock_cleanup(); |
828 | ||
1da177e4 | 829 | sock_unregister(PF_BLUETOOTH); |
27d35284 MH |
830 | |
831 | bt_sysfs_cleanup(); | |
ffcecac6 | 832 | |
e64c97b5 MH |
833 | bt_leds_cleanup(); |
834 | ||
ffcecac6 | 835 | debugfs_remove_recursive(bt_debugfs); |
1da177e4 LT |
836 | } |
837 | ||
838 | subsys_initcall(bt_init); | |
839 | module_exit(bt_exit); | |
840 | ||
63fbd24e | 841 | MODULE_AUTHOR("Marcel Holtmann <marcel@holtmann.org>"); |
9e8305b3 MH |
842 | MODULE_DESCRIPTION("Bluetooth Core ver " VERSION); |
843 | MODULE_VERSION(VERSION); | |
1da177e4 LT |
844 | MODULE_LICENSE("GPL"); |
845 | MODULE_ALIAS_NETPROTO(PF_BLUETOOTH); |