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> |
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 | ||
157 | void bt_accept_enqueue(struct sock *parent, struct sock *sk) | |
158 | { | |
159 | BT_DBG("parent %p, sk %p", parent, sk); | |
160 | ||
161 | sock_hold(sk); | |
e1633762 | 162 | lock_sock(sk); |
1da177e4 LT |
163 | list_add_tail(&bt_sk(sk)->accept_q, &bt_sk(parent)->accept_q); |
164 | bt_sk(sk)->parent = parent; | |
e1633762 | 165 | release_sock(sk); |
1da177e4 LT |
166 | parent->sk_ack_backlog++; |
167 | } | |
168 | EXPORT_SYMBOL(bt_accept_enqueue); | |
169 | ||
27bfbc21 DJ |
170 | /* Calling function must hold the sk lock. |
171 | * bt_sk(sk)->parent must be non-NULL meaning sk is in the parent list. | |
172 | */ | |
1da177e4 LT |
173 | void bt_accept_unlink(struct sock *sk) |
174 | { | |
175 | BT_DBG("sk %p state %d", sk, sk->sk_state); | |
176 | ||
177 | list_del_init(&bt_sk(sk)->accept_q); | |
178 | bt_sk(sk)->parent->sk_ack_backlog--; | |
179 | bt_sk(sk)->parent = NULL; | |
180 | sock_put(sk); | |
181 | } | |
182 | EXPORT_SYMBOL(bt_accept_unlink); | |
183 | ||
184 | struct sock *bt_accept_dequeue(struct sock *parent, struct socket *newsock) | |
185 | { | |
7eb7404f | 186 | struct bt_sock *s, *n; |
1da177e4 LT |
187 | struct sock *sk; |
188 | ||
189 | BT_DBG("parent %p", parent); | |
190 | ||
27bfbc21 | 191 | restart: |
7eb7404f GT |
192 | list_for_each_entry_safe(s, n, &bt_sk(parent)->accept_q, accept_q) { |
193 | sk = (struct sock *)s; | |
1da177e4 | 194 | |
27bfbc21 DJ |
195 | /* Prevent early freeing of sk due to unlink and sock_kill */ |
196 | sock_hold(sk); | |
8a154a8f | 197 | lock_sock(sk); |
1da177e4 | 198 | |
27bfbc21 DJ |
199 | /* Check sk has not already been unlinked via |
200 | * bt_accept_unlink() due to serialisation caused by sk locking | |
201 | */ | |
202 | if (!bt_sk(sk)->parent) { | |
203 | BT_DBG("sk %p, already unlinked", sk); | |
204 | release_sock(sk); | |
205 | sock_put(sk); | |
206 | ||
207 | /* Restart the loop as sk is no longer in the list | |
208 | * and also avoid a potential infinite loop because | |
209 | * list_for_each_entry_safe() is not thread safe. | |
210 | */ | |
211 | goto restart; | |
212 | } | |
213 | ||
214 | /* sk is safely in the parent list so reduce reference count */ | |
215 | sock_put(sk); | |
216 | ||
1da177e4 LT |
217 | /* FIXME: Is this check still needed */ |
218 | if (sk->sk_state == BT_CLOSED) { | |
1da177e4 | 219 | bt_accept_unlink(sk); |
1a11ec89 | 220 | release_sock(sk); |
1da177e4 LT |
221 | continue; |
222 | } | |
223 | ||
c4f912e1 | 224 | if (sk->sk_state == BT_CONNECTED || !newsock || |
d060991f | 225 | test_bit(BT_SK_DEFER_SETUP, &bt_sk(parent)->flags)) { |
1da177e4 LT |
226 | bt_accept_unlink(sk); |
227 | if (newsock) | |
228 | sock_graft(sk, newsock); | |
d37f50e1 | 229 | |
8a154a8f | 230 | release_sock(sk); |
1da177e4 LT |
231 | return sk; |
232 | } | |
233 | ||
8a154a8f | 234 | release_sock(sk); |
1da177e4 | 235 | } |
d37f50e1 | 236 | |
1da177e4 LT |
237 | return NULL; |
238 | } | |
239 | EXPORT_SYMBOL(bt_accept_dequeue); | |
240 | ||
1b784140 YX |
241 | int bt_sock_recvmsg(struct socket *sock, struct msghdr *msg, size_t len, |
242 | int flags) | |
1da177e4 LT |
243 | { |
244 | int noblock = flags & MSG_DONTWAIT; | |
245 | struct sock *sk = sock->sk; | |
246 | struct sk_buff *skb; | |
247 | size_t copied; | |
b5f34f94 | 248 | size_t skblen; |
1da177e4 LT |
249 | int err; |
250 | ||
a418b893 | 251 | BT_DBG("sock %p sk %p len %zu", sock, sk, len); |
1da177e4 | 252 | |
d94a6104 | 253 | if (flags & MSG_OOB) |
1da177e4 LT |
254 | return -EOPNOTSUPP; |
255 | ||
5a08ecce AE |
256 | skb = skb_recv_datagram(sk, flags, noblock, &err); |
257 | if (!skb) { | |
f3d33426 | 258 | if (sk->sk_shutdown & RCV_SHUTDOWN) |
1da177e4 | 259 | return 0; |
f3d33426 | 260 | |
1da177e4 LT |
261 | return err; |
262 | } | |
263 | ||
b5f34f94 | 264 | skblen = skb->len; |
1da177e4 LT |
265 | copied = skb->len; |
266 | if (len < copied) { | |
267 | msg->msg_flags |= MSG_TRUNC; | |
268 | copied = len; | |
269 | } | |
270 | ||
badff6d0 | 271 | skb_reset_transport_header(skb); |
51f3d02b | 272 | err = skb_copy_datagram_msg(skb, 0, msg, copied); |
d9763698 | 273 | if (err == 0) { |
3b885787 | 274 | sock_recv_ts_and_drops(msg, sk, skb); |
1da177e4 | 275 | |
9dcbc313 | 276 | if (msg->msg_name && bt_sk(sk)->skb_msg_name) |
d9763698 MH |
277 | bt_sk(sk)->skb_msg_name(skb, msg->msg_name, |
278 | &msg->msg_namelen); | |
d9763698 MH |
279 | } |
280 | ||
1da177e4 LT |
281 | skb_free_datagram(sk, skb); |
282 | ||
90a56f72 | 283 | if (flags & MSG_TRUNC) |
b5f34f94 DK |
284 | copied = skblen; |
285 | ||
1da177e4 LT |
286 | return err ? : copied; |
287 | } | |
288 | EXPORT_SYMBOL(bt_sock_recvmsg); | |
289 | ||
796c86ee MM |
290 | static long bt_sock_data_wait(struct sock *sk, long timeo) |
291 | { | |
292 | DECLARE_WAITQUEUE(wait, current); | |
293 | ||
294 | add_wait_queue(sk_sleep(sk), &wait); | |
295 | for (;;) { | |
296 | set_current_state(TASK_INTERRUPTIBLE); | |
297 | ||
298 | if (!skb_queue_empty(&sk->sk_receive_queue)) | |
299 | break; | |
300 | ||
301 | if (sk->sk_err || (sk->sk_shutdown & RCV_SHUTDOWN)) | |
302 | break; | |
303 | ||
304 | if (signal_pending(current) || !timeo) | |
305 | break; | |
306 | ||
9cd3e072 | 307 | sk_set_bit(SOCKWQ_ASYNC_WAITDATA, sk); |
796c86ee MM |
308 | release_sock(sk); |
309 | timeo = schedule_timeout(timeo); | |
310 | lock_sock(sk); | |
9cd3e072 | 311 | sk_clear_bit(SOCKWQ_ASYNC_WAITDATA, sk); |
796c86ee MM |
312 | } |
313 | ||
314 | __set_current_state(TASK_RUNNING); | |
315 | remove_wait_queue(sk_sleep(sk), &wait); | |
316 | return timeo; | |
317 | } | |
318 | ||
1b784140 YX |
319 | int bt_sock_stream_recvmsg(struct socket *sock, struct msghdr *msg, |
320 | size_t size, int flags) | |
796c86ee MM |
321 | { |
322 | struct sock *sk = sock->sk; | |
323 | int err = 0; | |
324 | size_t target, copied = 0; | |
325 | long timeo; | |
326 | ||
327 | if (flags & MSG_OOB) | |
328 | return -EOPNOTSUPP; | |
329 | ||
796c86ee MM |
330 | BT_DBG("sk %p size %zu", sk, size); |
331 | ||
332 | lock_sock(sk); | |
333 | ||
334 | target = sock_rcvlowat(sk, flags & MSG_WAITALL, size); | |
335 | timeo = sock_rcvtimeo(sk, flags & MSG_DONTWAIT); | |
336 | ||
337 | do { | |
338 | struct sk_buff *skb; | |
339 | int chunk; | |
340 | ||
341 | skb = skb_dequeue(&sk->sk_receive_queue); | |
342 | if (!skb) { | |
343 | if (copied >= target) | |
344 | break; | |
345 | ||
5a08ecce AE |
346 | err = sock_error(sk); |
347 | if (err) | |
796c86ee MM |
348 | break; |
349 | if (sk->sk_shutdown & RCV_SHUTDOWN) | |
350 | break; | |
351 | ||
352 | err = -EAGAIN; | |
353 | if (!timeo) | |
354 | break; | |
355 | ||
356 | timeo = bt_sock_data_wait(sk, timeo); | |
357 | ||
358 | if (signal_pending(current)) { | |
359 | err = sock_intr_errno(timeo); | |
360 | goto out; | |
361 | } | |
362 | continue; | |
363 | } | |
364 | ||
365 | chunk = min_t(unsigned int, skb->len, size); | |
51f3d02b | 366 | if (skb_copy_datagram_msg(skb, 0, msg, chunk)) { |
796c86ee MM |
367 | skb_queue_head(&sk->sk_receive_queue, skb); |
368 | if (!copied) | |
369 | copied = -EFAULT; | |
370 | break; | |
371 | } | |
372 | copied += chunk; | |
373 | size -= chunk; | |
374 | ||
375 | sock_recv_ts_and_drops(msg, sk, skb); | |
376 | ||
377 | if (!(flags & MSG_PEEK)) { | |
5b668eb3 MM |
378 | int skb_len = skb_headlen(skb); |
379 | ||
380 | if (chunk <= skb_len) { | |
381 | __skb_pull(skb, chunk); | |
382 | } else { | |
383 | struct sk_buff *frag; | |
384 | ||
385 | __skb_pull(skb, skb_len); | |
386 | chunk -= skb_len; | |
387 | ||
388 | skb_walk_frags(skb, frag) { | |
389 | if (chunk <= frag->len) { | |
390 | /* Pulling partial data */ | |
391 | skb->len -= chunk; | |
392 | skb->data_len -= chunk; | |
393 | __skb_pull(frag, chunk); | |
394 | break; | |
395 | } else if (frag->len) { | |
396 | /* Pulling all frag data */ | |
397 | chunk -= frag->len; | |
398 | skb->len -= frag->len; | |
399 | skb->data_len -= frag->len; | |
400 | __skb_pull(frag, frag->len); | |
401 | } | |
402 | } | |
403 | } | |
404 | ||
796c86ee MM |
405 | if (skb->len) { |
406 | skb_queue_head(&sk->sk_receive_queue, skb); | |
407 | break; | |
408 | } | |
409 | kfree_skb(skb); | |
410 | ||
411 | } else { | |
412 | /* put message back and return */ | |
413 | skb_queue_head(&sk->sk_receive_queue, skb); | |
414 | break; | |
415 | } | |
416 | } while (size); | |
417 | ||
418 | out: | |
419 | release_sock(sk); | |
420 | return copied ? : err; | |
421 | } | |
422 | EXPORT_SYMBOL(bt_sock_stream_recvmsg); | |
423 | ||
ade994f4 | 424 | static inline __poll_t bt_accept_poll(struct sock *parent) |
1da177e4 | 425 | { |
7eb7404f | 426 | struct bt_sock *s, *n; |
1da177e4 LT |
427 | struct sock *sk; |
428 | ||
7eb7404f GT |
429 | list_for_each_entry_safe(s, n, &bt_sk(parent)->accept_q, accept_q) { |
430 | sk = (struct sock *)s; | |
d5f2d2be | 431 | if (sk->sk_state == BT_CONNECTED || |
c5daa683 GP |
432 | (test_bit(BT_SK_DEFER_SETUP, &bt_sk(parent)->flags) && |
433 | sk->sk_state == BT_CONNECT2)) | |
a9a08845 | 434 | return EPOLLIN | EPOLLRDNORM; |
1da177e4 LT |
435 | } |
436 | ||
437 | return 0; | |
438 | } | |
439 | ||
ade994f4 | 440 | __poll_t bt_sock_poll(struct file *file, struct socket *sock, |
8fc9ced3 | 441 | poll_table *wait) |
1da177e4 LT |
442 | { |
443 | struct sock *sk = sock->sk; | |
ade994f4 | 444 | __poll_t mask = 0; |
1da177e4 LT |
445 | |
446 | BT_DBG("sock %p, sk %p", sock, sk); | |
447 | ||
aa395145 | 448 | poll_wait(file, sk_sleep(sk), wait); |
1da177e4 LT |
449 | |
450 | if (sk->sk_state == BT_LISTEN) | |
451 | return bt_accept_poll(sk); | |
452 | ||
453 | if (sk->sk_err || !skb_queue_empty(&sk->sk_error_queue)) | |
a9a08845 LT |
454 | mask |= EPOLLERR | |
455 | (sock_flag(sk, SOCK_SELECT_ERR_QUEUE) ? EPOLLPRI : 0); | |
1da177e4 | 456 | |
f348d70a | 457 | if (sk->sk_shutdown & RCV_SHUTDOWN) |
a9a08845 | 458 | mask |= EPOLLRDHUP | EPOLLIN | EPOLLRDNORM; |
f348d70a | 459 | |
1da177e4 | 460 | if (sk->sk_shutdown == SHUTDOWN_MASK) |
a9a08845 | 461 | mask |= EPOLLHUP; |
1da177e4 | 462 | |
db40980f | 463 | if (!skb_queue_empty(&sk->sk_receive_queue)) |
a9a08845 | 464 | mask |= EPOLLIN | EPOLLRDNORM; |
1da177e4 LT |
465 | |
466 | if (sk->sk_state == BT_CLOSED) | |
a9a08845 | 467 | mask |= EPOLLHUP; |
1da177e4 LT |
468 | |
469 | if (sk->sk_state == BT_CONNECT || | |
470 | sk->sk_state == BT_CONNECT2 || | |
471 | sk->sk_state == BT_CONFIG) | |
472 | return mask; | |
473 | ||
c5daa683 | 474 | if (!test_bit(BT_SK_SUSPEND, &bt_sk(sk)->flags) && sock_writeable(sk)) |
a9a08845 | 475 | mask |= EPOLLOUT | EPOLLWRNORM | EPOLLWRBAND; |
1da177e4 | 476 | else |
9cd3e072 | 477 | sk_set_bit(SOCKWQ_ASYNC_NOSPACE, sk); |
1da177e4 LT |
478 | |
479 | return mask; | |
480 | } | |
481 | EXPORT_SYMBOL(bt_sock_poll); | |
482 | ||
3241ad82 MH |
483 | int bt_sock_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg) |
484 | { | |
485 | struct sock *sk = sock->sk; | |
43cbeee9 MH |
486 | struct sk_buff *skb; |
487 | long amount; | |
3241ad82 MH |
488 | int err; |
489 | ||
490 | BT_DBG("sk %p cmd %x arg %lx", sk, cmd, arg); | |
491 | ||
492 | switch (cmd) { | |
43cbeee9 MH |
493 | case TIOCOUTQ: |
494 | if (sk->sk_state == BT_LISTEN) | |
495 | return -EINVAL; | |
496 | ||
31e6d363 | 497 | amount = sk->sk_sndbuf - sk_wmem_alloc_get(sk); |
43cbeee9 MH |
498 | if (amount < 0) |
499 | amount = 0; | |
500 | err = put_user(amount, (int __user *) arg); | |
501 | break; | |
502 | ||
503 | case TIOCINQ: | |
504 | if (sk->sk_state == BT_LISTEN) | |
505 | return -EINVAL; | |
506 | ||
507 | lock_sock(sk); | |
508 | skb = skb_peek(&sk->sk_receive_queue); | |
509 | amount = skb ? skb->len : 0; | |
510 | release_sock(sk); | |
511 | err = put_user(amount, (int __user *) arg); | |
512 | break; | |
513 | ||
3241ad82 MH |
514 | case SIOCGSTAMP: |
515 | err = sock_get_timestamp(sk, (struct timeval __user *) arg); | |
516 | break; | |
517 | ||
518 | case SIOCGSTAMPNS: | |
519 | err = sock_get_timestampns(sk, (struct timespec __user *) arg); | |
520 | break; | |
521 | ||
522 | default: | |
523 | err = -ENOIOCTLCMD; | |
524 | break; | |
525 | } | |
526 | ||
527 | return err; | |
528 | } | |
529 | EXPORT_SYMBOL(bt_sock_ioctl); | |
530 | ||
0fba96f9 | 531 | /* This function expects the sk lock to be held when called */ |
1da177e4 LT |
532 | int bt_sock_wait_state(struct sock *sk, int state, unsigned long timeo) |
533 | { | |
534 | DECLARE_WAITQUEUE(wait, current); | |
535 | int err = 0; | |
536 | ||
537 | BT_DBG("sk %p", sk); | |
538 | ||
aa395145 | 539 | add_wait_queue(sk_sleep(sk), &wait); |
9be4e3fb | 540 | set_current_state(TASK_INTERRUPTIBLE); |
1da177e4 | 541 | while (sk->sk_state != state) { |
1da177e4 | 542 | if (!timeo) { |
b4c612a4 | 543 | err = -EINPROGRESS; |
1da177e4 LT |
544 | break; |
545 | } | |
546 | ||
547 | if (signal_pending(current)) { | |
548 | err = sock_intr_errno(timeo); | |
549 | break; | |
550 | } | |
551 | ||
552 | release_sock(sk); | |
553 | timeo = schedule_timeout(timeo); | |
554 | lock_sock(sk); | |
9be4e3fb | 555 | set_current_state(TASK_INTERRUPTIBLE); |
1da177e4 | 556 | |
c1cbe4b7 BL |
557 | err = sock_error(sk); |
558 | if (err) | |
1da177e4 | 559 | break; |
1da177e4 | 560 | } |
9be4e3fb | 561 | __set_current_state(TASK_RUNNING); |
aa395145 | 562 | remove_wait_queue(sk_sleep(sk), &wait); |
1da177e4 LT |
563 | return err; |
564 | } | |
565 | EXPORT_SYMBOL(bt_sock_wait_state); | |
566 | ||
e793dcf0 JH |
567 | /* This function expects the sk lock to be held when called */ |
568 | int bt_sock_wait_ready(struct sock *sk, unsigned long flags) | |
569 | { | |
570 | DECLARE_WAITQUEUE(wait, current); | |
571 | unsigned long timeo; | |
572 | int err = 0; | |
573 | ||
574 | BT_DBG("sk %p", sk); | |
575 | ||
576 | timeo = sock_sndtimeo(sk, flags & O_NONBLOCK); | |
577 | ||
578 | add_wait_queue(sk_sleep(sk), &wait); | |
579 | set_current_state(TASK_INTERRUPTIBLE); | |
580 | while (test_bit(BT_SK_SUSPEND, &bt_sk(sk)->flags)) { | |
581 | if (!timeo) { | |
582 | err = -EAGAIN; | |
583 | break; | |
584 | } | |
585 | ||
586 | if (signal_pending(current)) { | |
587 | err = sock_intr_errno(timeo); | |
588 | break; | |
589 | } | |
590 | ||
591 | release_sock(sk); | |
592 | timeo = schedule_timeout(timeo); | |
593 | lock_sock(sk); | |
594 | set_current_state(TASK_INTERRUPTIBLE); | |
595 | ||
596 | err = sock_error(sk); | |
597 | if (err) | |
598 | break; | |
599 | } | |
600 | __set_current_state(TASK_RUNNING); | |
601 | remove_wait_queue(sk_sleep(sk), &wait); | |
602 | ||
603 | return err; | |
604 | } | |
605 | EXPORT_SYMBOL(bt_sock_wait_ready); | |
606 | ||
256a06c8 MY |
607 | #ifdef CONFIG_PROC_FS |
608 | struct bt_seq_state { | |
609 | struct bt_sock_list *l; | |
610 | }; | |
611 | ||
612 | static void *bt_seq_start(struct seq_file *seq, loff_t *pos) | |
613 | __acquires(seq->private->l->lock) | |
614 | { | |
615 | struct bt_seq_state *s = seq->private; | |
616 | struct bt_sock_list *l = s->l; | |
617 | ||
618 | read_lock(&l->lock); | |
619 | return seq_hlist_start_head(&l->head, *pos); | |
620 | } | |
621 | ||
622 | static void *bt_seq_next(struct seq_file *seq, void *v, loff_t *pos) | |
623 | { | |
624 | struct bt_seq_state *s = seq->private; | |
625 | struct bt_sock_list *l = s->l; | |
626 | ||
627 | return seq_hlist_next(v, &l->head, pos); | |
628 | } | |
629 | ||
630 | static void bt_seq_stop(struct seq_file *seq, void *v) | |
631 | __releases(seq->private->l->lock) | |
632 | { | |
633 | struct bt_seq_state *s = seq->private; | |
634 | struct bt_sock_list *l = s->l; | |
635 | ||
636 | read_unlock(&l->lock); | |
637 | } | |
638 | ||
639 | static int bt_seq_show(struct seq_file *seq, void *v) | |
640 | { | |
256a06c8 MY |
641 | struct bt_seq_state *s = seq->private; |
642 | struct bt_sock_list *l = s->l; | |
256a06c8 MY |
643 | |
644 | if (v == SEQ_START_TOKEN) { | |
c5605755 | 645 | seq_puts(seq ,"sk RefCnt Rmem Wmem User Inode Parent"); |
256a06c8 MY |
646 | |
647 | if (l->custom_seq_show) { | |
648 | seq_putc(seq, ' '); | |
649 | l->custom_seq_show(seq, v); | |
650 | } | |
651 | ||
652 | seq_putc(seq, '\n'); | |
653 | } else { | |
09d5d4aa AE |
654 | struct sock *sk = sk_entry(v); |
655 | struct bt_sock *bt = bt_sk(sk); | |
256a06c8 | 656 | |
7028a886 | 657 | seq_printf(seq, |
5f6cd79f | 658 | "%pK %-6d %-6u %-6u %-6u %-6lu %-6lu", |
256a06c8 | 659 | sk, |
41c6d650 | 660 | refcount_read(&sk->sk_refcnt), |
256a06c8 MY |
661 | sk_rmem_alloc_get(sk), |
662 | sk_wmem_alloc_get(sk), | |
1bbb3095 | 663 | from_kuid(seq_user_ns(seq), sock_i_uid(sk)), |
256a06c8 | 664 | sock_i_ino(sk), |
256a06c8 MY |
665 | bt->parent? sock_i_ino(bt->parent): 0LU); |
666 | ||
667 | if (l->custom_seq_show) { | |
668 | seq_putc(seq, ' '); | |
669 | l->custom_seq_show(seq, v); | |
670 | } | |
671 | ||
672 | seq_putc(seq, '\n'); | |
673 | } | |
674 | return 0; | |
675 | } | |
676 | ||
26b0f4e2 | 677 | static const struct seq_operations bt_seq_ops = { |
256a06c8 MY |
678 | .start = bt_seq_start, |
679 | .next = bt_seq_next, | |
680 | .stop = bt_seq_stop, | |
681 | .show = bt_seq_show, | |
682 | }; | |
683 | ||
684 | static int bt_seq_open(struct inode *inode, struct file *file) | |
685 | { | |
686 | struct bt_sock_list *sk_list; | |
687 | struct bt_seq_state *s; | |
688 | ||
d9dda78b | 689 | sk_list = PDE_DATA(inode); |
256a06c8 MY |
690 | s = __seq_open_private(file, &bt_seq_ops, |
691 | sizeof(struct bt_seq_state)); | |
31f47073 | 692 | if (!s) |
256a06c8 MY |
693 | return -ENOMEM; |
694 | ||
695 | s->l = sk_list; | |
696 | return 0; | |
697 | } | |
698 | ||
14805359 AV |
699 | static const struct file_operations bt_fops = { |
700 | .open = bt_seq_open, | |
701 | .read = seq_read, | |
702 | .llseek = seq_lseek, | |
703 | .release = seq_release_private | |
704 | }; | |
705 | ||
b0316615 | 706 | int bt_procfs_init(struct net *net, const char *name, |
f37590bd | 707 | struct bt_sock_list *sk_list, |
256a06c8 MY |
708 | int (* seq_show)(struct seq_file *, void *)) |
709 | { | |
256a06c8 MY |
710 | sk_list->custom_seq_show = seq_show; |
711 | ||
4d006263 | 712 | if (!proc_create_data(name, 0, net->proc_net, &bt_fops, sk_list)) |
256a06c8 | 713 | return -ENOMEM; |
256a06c8 MY |
714 | return 0; |
715 | } | |
716 | ||
717 | void bt_procfs_cleanup(struct net *net, const char *name) | |
718 | { | |
ece31ffd | 719 | remove_proc_entry(name, net->proc_net); |
256a06c8 MY |
720 | } |
721 | #else | |
b0316615 | 722 | int bt_procfs_init(struct net *net, const char *name, |
f37590bd | 723 | struct bt_sock_list *sk_list, |
256a06c8 MY |
724 | int (* seq_show)(struct seq_file *, void *)) |
725 | { | |
726 | return 0; | |
727 | } | |
728 | ||
729 | void bt_procfs_cleanup(struct net *net, const char *name) | |
730 | { | |
731 | } | |
732 | #endif | |
733 | EXPORT_SYMBOL(bt_procfs_init); | |
734 | EXPORT_SYMBOL(bt_procfs_cleanup); | |
735 | ||
173e7837 | 736 | static const struct net_proto_family bt_sock_family_ops = { |
1da177e4 LT |
737 | .owner = THIS_MODULE, |
738 | .family = PF_BLUETOOTH, | |
739 | .create = bt_sock_create, | |
740 | }; | |
741 | ||
ffcecac6 MH |
742 | struct dentry *bt_debugfs; |
743 | EXPORT_SYMBOL_GPL(bt_debugfs); | |
744 | ||
9e8305b3 MH |
745 | #define VERSION __stringify(BT_SUBSYS_VERSION) "." \ |
746 | __stringify(BT_SUBSYS_REVISION) | |
747 | ||
1da177e4 LT |
748 | static int __init bt_init(void) |
749 | { | |
27d35284 MH |
750 | int err; |
751 | ||
b4772ef8 | 752 | sock_skb_cb_check_size(sizeof(struct bt_skb_cb)); |
7cb9d20f | 753 | |
9e8305b3 | 754 | BT_INFO("Core ver %s", VERSION); |
1da177e4 | 755 | |
ee485290 MH |
756 | err = bt_selftest(); |
757 | if (err < 0) | |
758 | return err; | |
759 | ||
ffcecac6 MH |
760 | bt_debugfs = debugfs_create_dir("bluetooth", NULL); |
761 | ||
e64c97b5 MH |
762 | bt_leds_init(); |
763 | ||
27d35284 MH |
764 | err = bt_sysfs_init(); |
765 | if (err < 0) | |
766 | return err; | |
1da177e4 | 767 | |
27d35284 | 768 | err = sock_register(&bt_sock_family_ops); |
1b259904 ME |
769 | if (err) |
770 | goto cleanup_sysfs; | |
1da177e4 | 771 | |
27d35284 | 772 | BT_INFO("HCI device and connection manager initialized"); |
1da177e4 | 773 | |
64274518 | 774 | err = hci_sock_init(); |
1b259904 ME |
775 | if (err) |
776 | goto unregister_socket; | |
64274518 GP |
777 | |
778 | err = l2cap_init(); | |
1b259904 ME |
779 | if (err) |
780 | goto cleanup_socket; | |
64274518 GP |
781 | |
782 | err = sco_init(); | |
1b259904 ME |
783 | if (err) |
784 | goto cleanup_cap; | |
1da177e4 | 785 | |
6d785aa3 | 786 | err = mgmt_init(); |
1b259904 ME |
787 | if (err) |
788 | goto cleanup_sco; | |
6d785aa3 | 789 | |
1da177e4 | 790 | return 0; |
64274518 | 791 | |
1b259904 ME |
792 | cleanup_sco: |
793 | sco_exit(); | |
794 | cleanup_cap: | |
795 | l2cap_exit(); | |
796 | cleanup_socket: | |
64274518 | 797 | hci_sock_cleanup(); |
1b259904 | 798 | unregister_socket: |
64274518 | 799 | sock_unregister(PF_BLUETOOTH); |
1b259904 | 800 | cleanup_sysfs: |
64274518 | 801 | bt_sysfs_cleanup(); |
64274518 | 802 | return err; |
1da177e4 LT |
803 | } |
804 | ||
805 | static void __exit bt_exit(void) | |
806 | { | |
6d785aa3 JH |
807 | mgmt_exit(); |
808 | ||
64274518 GP |
809 | sco_exit(); |
810 | ||
811 | l2cap_exit(); | |
812 | ||
1da177e4 LT |
813 | hci_sock_cleanup(); |
814 | ||
1da177e4 | 815 | sock_unregister(PF_BLUETOOTH); |
27d35284 MH |
816 | |
817 | bt_sysfs_cleanup(); | |
ffcecac6 | 818 | |
e64c97b5 MH |
819 | bt_leds_cleanup(); |
820 | ||
ffcecac6 | 821 | debugfs_remove_recursive(bt_debugfs); |
1da177e4 LT |
822 | } |
823 | ||
824 | subsys_initcall(bt_init); | |
825 | module_exit(bt_exit); | |
826 | ||
63fbd24e | 827 | MODULE_AUTHOR("Marcel Holtmann <marcel@holtmann.org>"); |
9e8305b3 MH |
828 | MODULE_DESCRIPTION("Bluetooth Core ver " VERSION); |
829 | MODULE_VERSION(VERSION); | |
1da177e4 LT |
830 | MODULE_LICENSE("GPL"); |
831 | MODULE_ALIAS_NETPROTO(PF_BLUETOOTH); |