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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 | 40 | /* Bluetooth sockets */ |
ccf74f23 | 41 | #define BT_MAX_PROTO (BTPROTO_LAST + 1) |
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", | |
ccf74f23 | 55 | "sk_lock-AF_BLUETOOTH-BTPROTO_ISO", |
68845cb2 DY |
56 | }; |
57 | ||
db7aa1c2 | 58 | static struct lock_class_key bt_slock_key[BT_MAX_PROTO]; |
36cbd3dc | 59 | static const char *const bt_slock_key_strings[BT_MAX_PROTO] = { |
68845cb2 DY |
60 | "slock-AF_BLUETOOTH-BTPROTO_L2CAP", |
61 | "slock-AF_BLUETOOTH-BTPROTO_HCI", | |
62 | "slock-AF_BLUETOOTH-BTPROTO_SCO", | |
63 | "slock-AF_BLUETOOTH-BTPROTO_RFCOMM", | |
64 | "slock-AF_BLUETOOTH-BTPROTO_BNEP", | |
65 | "slock-AF_BLUETOOTH-BTPROTO_CMTP", | |
66 | "slock-AF_BLUETOOTH-BTPROTO_HIDP", | |
67 | "slock-AF_BLUETOOTH-BTPROTO_AVDTP", | |
ccf74f23 | 68 | "slock-AF_BLUETOOTH-BTPROTO_ISO", |
68845cb2 | 69 | }; |
db7aa1c2 | 70 | |
b5a30dda | 71 | void bt_sock_reclassify_lock(struct sock *sk, int proto) |
db7aa1c2 | 72 | { |
b5a30dda | 73 | BUG_ON(!sk); |
fafc4e1e | 74 | BUG_ON(!sock_allow_reclassification(sk)); |
db7aa1c2 MH |
75 | |
76 | sock_lock_init_class_and_name(sk, | |
b8ddc3b1 TM |
77 | bt_slock_key_strings[proto], &bt_slock_key[proto], |
78 | bt_key_strings[proto], &bt_lock_key[proto]); | |
db7aa1c2 | 79 | } |
b5a30dda | 80 | EXPORT_SYMBOL(bt_sock_reclassify_lock); |
1da177e4 | 81 | |
ec1b4cf7 | 82 | int bt_sock_register(int proto, const struct net_proto_family *ops) |
1da177e4 | 83 | { |
74da626a MH |
84 | int err = 0; |
85 | ||
1da177e4 LT |
86 | if (proto < 0 || proto >= BT_MAX_PROTO) |
87 | return -EINVAL; | |
88 | ||
74da626a MH |
89 | write_lock(&bt_proto_lock); |
90 | ||
1da177e4 | 91 | if (bt_proto[proto]) |
74da626a MH |
92 | err = -EEXIST; |
93 | else | |
94 | bt_proto[proto] = ops; | |
95 | ||
96 | write_unlock(&bt_proto_lock); | |
1da177e4 | 97 | |
74da626a | 98 | return err; |
1da177e4 LT |
99 | } |
100 | EXPORT_SYMBOL(bt_sock_register); | |
101 | ||
be9f97f0 | 102 | void bt_sock_unregister(int proto) |
1da177e4 LT |
103 | { |
104 | if (proto < 0 || proto >= BT_MAX_PROTO) | |
be9f97f0 | 105 | return; |
1da177e4 | 106 | |
74da626a | 107 | write_lock(&bt_proto_lock); |
be9f97f0 | 108 | bt_proto[proto] = NULL; |
74da626a | 109 | write_unlock(&bt_proto_lock); |
1da177e4 LT |
110 | } |
111 | EXPORT_SYMBOL(bt_sock_unregister); | |
112 | ||
3f378b68 EP |
113 | static int bt_sock_create(struct net *net, struct socket *sock, int proto, |
114 | int kern) | |
1da177e4 | 115 | { |
74da626a | 116 | int err; |
1da177e4 | 117 | |
1b8d7ae4 EB |
118 | if (net != &init_net) |
119 | return -EAFNOSUPPORT; | |
120 | ||
1da177e4 LT |
121 | if (proto < 0 || proto >= BT_MAX_PROTO) |
122 | return -EINVAL; | |
123 | ||
95a5afca | 124 | if (!bt_proto[proto]) |
1da177e4 | 125 | request_module("bt-proto-%d", proto); |
74da626a | 126 | |
1da177e4 | 127 | err = -EPROTONOSUPPORT; |
74da626a MH |
128 | |
129 | read_lock(&bt_proto_lock); | |
130 | ||
1da177e4 | 131 | if (bt_proto[proto] && try_module_get(bt_proto[proto]->owner)) { |
3f378b68 | 132 | err = bt_proto[proto]->create(net, sock, proto, kern); |
b5a30dda OP |
133 | if (!err) |
134 | bt_sock_reclassify_lock(sock->sk, proto); | |
1da177e4 LT |
135 | module_put(bt_proto[proto]->owner); |
136 | } | |
74da626a MH |
137 | |
138 | read_unlock(&bt_proto_lock); | |
139 | ||
8e87d142 | 140 | return err; |
1da177e4 LT |
141 | } |
142 | ||
143 | void bt_sock_link(struct bt_sock_list *l, struct sock *sk) | |
144 | { | |
94f5bfb8 | 145 | write_lock(&l->lock); |
1da177e4 | 146 | sk_add_node(sk, &l->head); |
94f5bfb8 | 147 | write_unlock(&l->lock); |
1da177e4 LT |
148 | } |
149 | EXPORT_SYMBOL(bt_sock_link); | |
150 | ||
151 | void bt_sock_unlink(struct bt_sock_list *l, struct sock *sk) | |
152 | { | |
94f5bfb8 | 153 | write_lock(&l->lock); |
1da177e4 | 154 | sk_del_node_init(sk); |
94f5bfb8 | 155 | write_unlock(&l->lock); |
1da177e4 LT |
156 | } |
157 | EXPORT_SYMBOL(bt_sock_unlink); | |
158 | ||
c4f5627f | 159 | void bt_accept_enqueue(struct sock *parent, struct sock *sk, bool bh) |
1da177e4 LT |
160 | { |
161 | BT_DBG("parent %p, sk %p", parent, sk); | |
162 | ||
163 | sock_hold(sk); | |
c4f5627f MK |
164 | |
165 | if (bh) | |
166 | bh_lock_sock_nested(sk); | |
167 | else | |
168 | lock_sock_nested(sk, SINGLE_DEPTH_NESTING); | |
169 | ||
1da177e4 LT |
170 | list_add_tail(&bt_sk(sk)->accept_q, &bt_sk(parent)->accept_q); |
171 | bt_sk(sk)->parent = parent; | |
c4f5627f MK |
172 | |
173 | if (bh) | |
174 | bh_unlock_sock(sk); | |
175 | else | |
176 | release_sock(sk); | |
177 | ||
7976a11b | 178 | sk_acceptq_added(parent); |
1da177e4 LT |
179 | } |
180 | EXPORT_SYMBOL(bt_accept_enqueue); | |
181 | ||
27bfbc21 DJ |
182 | /* Calling function must hold the sk lock. |
183 | * bt_sk(sk)->parent must be non-NULL meaning sk is in the parent list. | |
184 | */ | |
1da177e4 LT |
185 | void bt_accept_unlink(struct sock *sk) |
186 | { | |
187 | BT_DBG("sk %p state %d", sk, sk->sk_state); | |
188 | ||
189 | list_del_init(&bt_sk(sk)->accept_q); | |
7976a11b | 190 | sk_acceptq_removed(bt_sk(sk)->parent); |
1da177e4 LT |
191 | bt_sk(sk)->parent = NULL; |
192 | sock_put(sk); | |
193 | } | |
194 | EXPORT_SYMBOL(bt_accept_unlink); | |
195 | ||
196 | struct sock *bt_accept_dequeue(struct sock *parent, struct socket *newsock) | |
197 | { | |
7eb7404f | 198 | struct bt_sock *s, *n; |
1da177e4 LT |
199 | struct sock *sk; |
200 | ||
201 | BT_DBG("parent %p", parent); | |
202 | ||
27bfbc21 | 203 | restart: |
7eb7404f GT |
204 | list_for_each_entry_safe(s, n, &bt_sk(parent)->accept_q, accept_q) { |
205 | sk = (struct sock *)s; | |
1da177e4 | 206 | |
27bfbc21 DJ |
207 | /* Prevent early freeing of sk due to unlink and sock_kill */ |
208 | sock_hold(sk); | |
8a154a8f | 209 | lock_sock(sk); |
1da177e4 | 210 | |
27bfbc21 DJ |
211 | /* Check sk has not already been unlinked via |
212 | * bt_accept_unlink() due to serialisation caused by sk locking | |
213 | */ | |
214 | if (!bt_sk(sk)->parent) { | |
215 | BT_DBG("sk %p, already unlinked", sk); | |
216 | release_sock(sk); | |
217 | sock_put(sk); | |
218 | ||
219 | /* Restart the loop as sk is no longer in the list | |
220 | * and also avoid a potential infinite loop because | |
221 | * list_for_each_entry_safe() is not thread safe. | |
222 | */ | |
223 | goto restart; | |
224 | } | |
225 | ||
226 | /* sk is safely in the parent list so reduce reference count */ | |
227 | sock_put(sk); | |
228 | ||
1da177e4 LT |
229 | /* FIXME: Is this check still needed */ |
230 | if (sk->sk_state == BT_CLOSED) { | |
1da177e4 | 231 | bt_accept_unlink(sk); |
1a11ec89 | 232 | release_sock(sk); |
1da177e4 LT |
233 | continue; |
234 | } | |
235 | ||
c4f912e1 | 236 | if (sk->sk_state == BT_CONNECTED || !newsock || |
d060991f | 237 | test_bit(BT_SK_DEFER_SETUP, &bt_sk(parent)->flags)) { |
1da177e4 LT |
238 | bt_accept_unlink(sk); |
239 | if (newsock) | |
240 | sock_graft(sk, newsock); | |
d37f50e1 | 241 | |
8a154a8f | 242 | release_sock(sk); |
1da177e4 LT |
243 | return sk; |
244 | } | |
245 | ||
8a154a8f | 246 | release_sock(sk); |
1da177e4 | 247 | } |
d37f50e1 | 248 | |
1da177e4 LT |
249 | return NULL; |
250 | } | |
251 | EXPORT_SYMBOL(bt_accept_dequeue); | |
252 | ||
1b784140 YX |
253 | int bt_sock_recvmsg(struct socket *sock, struct msghdr *msg, size_t len, |
254 | int flags) | |
1da177e4 | 255 | { |
1da177e4 LT |
256 | struct sock *sk = sock->sk; |
257 | struct sk_buff *skb; | |
258 | size_t copied; | |
b5f34f94 | 259 | size_t skblen; |
1da177e4 LT |
260 | int err; |
261 | ||
a418b893 | 262 | BT_DBG("sock %p sk %p len %zu", sock, sk, len); |
1da177e4 | 263 | |
d94a6104 | 264 | if (flags & MSG_OOB) |
1da177e4 LT |
265 | return -EOPNOTSUPP; |
266 | ||
f4b41f06 | 267 | skb = skb_recv_datagram(sk, flags, &err); |
5a08ecce | 268 | if (!skb) { |
f3d33426 | 269 | if (sk->sk_shutdown & RCV_SHUTDOWN) |
1da177e4 | 270 | return 0; |
f3d33426 | 271 | |
1da177e4 LT |
272 | return err; |
273 | } | |
274 | ||
b5f34f94 | 275 | skblen = skb->len; |
1da177e4 LT |
276 | copied = skb->len; |
277 | if (len < copied) { | |
278 | msg->msg_flags |= MSG_TRUNC; | |
279 | copied = len; | |
280 | } | |
281 | ||
badff6d0 | 282 | skb_reset_transport_header(skb); |
51f3d02b | 283 | err = skb_copy_datagram_msg(skb, 0, msg, copied); |
d9763698 | 284 | if (err == 0) { |
6fd1d51c | 285 | sock_recv_cmsgs(msg, sk, skb); |
1da177e4 | 286 | |
9dcbc313 | 287 | if (msg->msg_name && bt_sk(sk)->skb_msg_name) |
d9763698 MH |
288 | bt_sk(sk)->skb_msg_name(skb, msg->msg_name, |
289 | &msg->msg_namelen); | |
00398e1d AM |
290 | |
291 | if (bt_sk(sk)->skb_put_cmsg) | |
292 | bt_sk(sk)->skb_put_cmsg(skb, msg, sk); | |
d9763698 MH |
293 | } |
294 | ||
1da177e4 LT |
295 | skb_free_datagram(sk, skb); |
296 | ||
90a56f72 | 297 | if (flags & MSG_TRUNC) |
b5f34f94 DK |
298 | copied = skblen; |
299 | ||
1da177e4 LT |
300 | return err ? : copied; |
301 | } | |
302 | EXPORT_SYMBOL(bt_sock_recvmsg); | |
303 | ||
796c86ee MM |
304 | static long bt_sock_data_wait(struct sock *sk, long timeo) |
305 | { | |
306 | DECLARE_WAITQUEUE(wait, current); | |
307 | ||
308 | add_wait_queue(sk_sleep(sk), &wait); | |
309 | for (;;) { | |
310 | set_current_state(TASK_INTERRUPTIBLE); | |
311 | ||
312 | if (!skb_queue_empty(&sk->sk_receive_queue)) | |
313 | break; | |
314 | ||
315 | if (sk->sk_err || (sk->sk_shutdown & RCV_SHUTDOWN)) | |
316 | break; | |
317 | ||
318 | if (signal_pending(current) || !timeo) | |
319 | break; | |
320 | ||
9cd3e072 | 321 | sk_set_bit(SOCKWQ_ASYNC_WAITDATA, sk); |
796c86ee MM |
322 | release_sock(sk); |
323 | timeo = schedule_timeout(timeo); | |
324 | lock_sock(sk); | |
9cd3e072 | 325 | sk_clear_bit(SOCKWQ_ASYNC_WAITDATA, sk); |
796c86ee MM |
326 | } |
327 | ||
328 | __set_current_state(TASK_RUNNING); | |
329 | remove_wait_queue(sk_sleep(sk), &wait); | |
330 | return timeo; | |
331 | } | |
332 | ||
1b784140 YX |
333 | int bt_sock_stream_recvmsg(struct socket *sock, struct msghdr *msg, |
334 | size_t size, int flags) | |
796c86ee MM |
335 | { |
336 | struct sock *sk = sock->sk; | |
337 | int err = 0; | |
338 | size_t target, copied = 0; | |
339 | long timeo; | |
340 | ||
341 | if (flags & MSG_OOB) | |
342 | return -EOPNOTSUPP; | |
343 | ||
796c86ee MM |
344 | BT_DBG("sk %p size %zu", sk, size); |
345 | ||
346 | lock_sock(sk); | |
347 | ||
348 | target = sock_rcvlowat(sk, flags & MSG_WAITALL, size); | |
349 | timeo = sock_rcvtimeo(sk, flags & MSG_DONTWAIT); | |
350 | ||
351 | do { | |
352 | struct sk_buff *skb; | |
353 | int chunk; | |
354 | ||
355 | skb = skb_dequeue(&sk->sk_receive_queue); | |
356 | if (!skb) { | |
357 | if (copied >= target) | |
358 | break; | |
359 | ||
5a08ecce AE |
360 | err = sock_error(sk); |
361 | if (err) | |
796c86ee MM |
362 | break; |
363 | if (sk->sk_shutdown & RCV_SHUTDOWN) | |
364 | break; | |
365 | ||
366 | err = -EAGAIN; | |
367 | if (!timeo) | |
368 | break; | |
369 | ||
370 | timeo = bt_sock_data_wait(sk, timeo); | |
371 | ||
372 | if (signal_pending(current)) { | |
373 | err = sock_intr_errno(timeo); | |
374 | goto out; | |
375 | } | |
376 | continue; | |
377 | } | |
378 | ||
379 | chunk = min_t(unsigned int, skb->len, size); | |
51f3d02b | 380 | if (skb_copy_datagram_msg(skb, 0, msg, chunk)) { |
796c86ee MM |
381 | skb_queue_head(&sk->sk_receive_queue, skb); |
382 | if (!copied) | |
383 | copied = -EFAULT; | |
384 | break; | |
385 | } | |
386 | copied += chunk; | |
387 | size -= chunk; | |
388 | ||
6fd1d51c | 389 | sock_recv_cmsgs(msg, sk, skb); |
796c86ee MM |
390 | |
391 | if (!(flags & MSG_PEEK)) { | |
5b668eb3 MM |
392 | int skb_len = skb_headlen(skb); |
393 | ||
394 | if (chunk <= skb_len) { | |
395 | __skb_pull(skb, chunk); | |
396 | } else { | |
397 | struct sk_buff *frag; | |
398 | ||
399 | __skb_pull(skb, skb_len); | |
400 | chunk -= skb_len; | |
401 | ||
402 | skb_walk_frags(skb, frag) { | |
403 | if (chunk <= frag->len) { | |
404 | /* Pulling partial data */ | |
405 | skb->len -= chunk; | |
406 | skb->data_len -= chunk; | |
407 | __skb_pull(frag, chunk); | |
408 | break; | |
409 | } else if (frag->len) { | |
410 | /* Pulling all frag data */ | |
411 | chunk -= frag->len; | |
412 | skb->len -= frag->len; | |
413 | skb->data_len -= frag->len; | |
414 | __skb_pull(frag, frag->len); | |
415 | } | |
416 | } | |
417 | } | |
418 | ||
796c86ee MM |
419 | if (skb->len) { |
420 | skb_queue_head(&sk->sk_receive_queue, skb); | |
421 | break; | |
422 | } | |
423 | kfree_skb(skb); | |
424 | ||
425 | } else { | |
426 | /* put message back and return */ | |
427 | skb_queue_head(&sk->sk_receive_queue, skb); | |
428 | break; | |
429 | } | |
430 | } while (size); | |
431 | ||
432 | out: | |
433 | release_sock(sk); | |
434 | return copied ? : err; | |
435 | } | |
436 | EXPORT_SYMBOL(bt_sock_stream_recvmsg); | |
437 | ||
ade994f4 | 438 | static inline __poll_t bt_accept_poll(struct sock *parent) |
1da177e4 | 439 | { |
7eb7404f | 440 | struct bt_sock *s, *n; |
1da177e4 LT |
441 | struct sock *sk; |
442 | ||
7eb7404f GT |
443 | list_for_each_entry_safe(s, n, &bt_sk(parent)->accept_q, accept_q) { |
444 | sk = (struct sock *)s; | |
d5f2d2be | 445 | if (sk->sk_state == BT_CONNECTED || |
c5daa683 GP |
446 | (test_bit(BT_SK_DEFER_SETUP, &bt_sk(parent)->flags) && |
447 | sk->sk_state == BT_CONNECT2)) | |
a9a08845 | 448 | return EPOLLIN | EPOLLRDNORM; |
1da177e4 LT |
449 | } |
450 | ||
451 | return 0; | |
452 | } | |
453 | ||
a11e1d43 | 454 | __poll_t bt_sock_poll(struct file *file, struct socket *sock, |
b8ddc3b1 | 455 | poll_table *wait) |
1da177e4 LT |
456 | { |
457 | struct sock *sk = sock->sk; | |
ade994f4 | 458 | __poll_t mask = 0; |
1da177e4 | 459 | |
a11e1d43 LT |
460 | poll_wait(file, sk_sleep(sk), wait); |
461 | ||
1da177e4 LT |
462 | if (sk->sk_state == BT_LISTEN) |
463 | return bt_accept_poll(sk); | |
464 | ||
3ef7cf57 | 465 | if (sk->sk_err || !skb_queue_empty_lockless(&sk->sk_error_queue)) |
a9a08845 LT |
466 | mask |= EPOLLERR | |
467 | (sock_flag(sk, SOCK_SELECT_ERR_QUEUE) ? EPOLLPRI : 0); | |
1da177e4 | 468 | |
f348d70a | 469 | if (sk->sk_shutdown & RCV_SHUTDOWN) |
a9a08845 | 470 | mask |= EPOLLRDHUP | EPOLLIN | EPOLLRDNORM; |
f348d70a | 471 | |
1da177e4 | 472 | if (sk->sk_shutdown == SHUTDOWN_MASK) |
a9a08845 | 473 | mask |= EPOLLHUP; |
1da177e4 | 474 | |
3ef7cf57 | 475 | if (!skb_queue_empty_lockless(&sk->sk_receive_queue)) |
a9a08845 | 476 | mask |= EPOLLIN | EPOLLRDNORM; |
1da177e4 LT |
477 | |
478 | if (sk->sk_state == BT_CLOSED) | |
a9a08845 | 479 | mask |= EPOLLHUP; |
1da177e4 LT |
480 | |
481 | if (sk->sk_state == BT_CONNECT || | |
b8ddc3b1 TM |
482 | sk->sk_state == BT_CONNECT2 || |
483 | sk->sk_state == BT_CONFIG) | |
1da177e4 LT |
484 | return mask; |
485 | ||
c5daa683 | 486 | if (!test_bit(BT_SK_SUSPEND, &bt_sk(sk)->flags) && sock_writeable(sk)) |
a9a08845 | 487 | mask |= EPOLLOUT | EPOLLWRNORM | EPOLLWRBAND; |
1da177e4 | 488 | else |
9cd3e072 | 489 | sk_set_bit(SOCKWQ_ASYNC_NOSPACE, sk); |
1da177e4 LT |
490 | |
491 | return mask; | |
492 | } | |
a11e1d43 | 493 | EXPORT_SYMBOL(bt_sock_poll); |
1da177e4 | 494 | |
3241ad82 MH |
495 | int bt_sock_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg) |
496 | { | |
497 | struct sock *sk = sock->sk; | |
43cbeee9 MH |
498 | struct sk_buff *skb; |
499 | long amount; | |
3241ad82 MH |
500 | int err; |
501 | ||
502 | BT_DBG("sk %p cmd %x arg %lx", sk, cmd, arg); | |
503 | ||
504 | switch (cmd) { | |
43cbeee9 MH |
505 | case TIOCOUTQ: |
506 | if (sk->sk_state == BT_LISTEN) | |
507 | return -EINVAL; | |
508 | ||
31e6d363 | 509 | amount = sk->sk_sndbuf - sk_wmem_alloc_get(sk); |
43cbeee9 MH |
510 | if (amount < 0) |
511 | amount = 0; | |
b8ddc3b1 | 512 | err = put_user(amount, (int __user *)arg); |
43cbeee9 MH |
513 | break; |
514 | ||
515 | case TIOCINQ: | |
516 | if (sk->sk_state == BT_LISTEN) | |
517 | return -EINVAL; | |
518 | ||
519 | lock_sock(sk); | |
520 | skb = skb_peek(&sk->sk_receive_queue); | |
521 | amount = skb ? skb->len : 0; | |
522 | release_sock(sk); | |
b8ddc3b1 | 523 | err = put_user(amount, (int __user *)arg); |
43cbeee9 MH |
524 | break; |
525 | ||
3241ad82 MH |
526 | default: |
527 | err = -ENOIOCTLCMD; | |
528 | break; | |
529 | } | |
530 | ||
531 | return err; | |
532 | } | |
533 | EXPORT_SYMBOL(bt_sock_ioctl); | |
534 | ||
0fba96f9 | 535 | /* This function expects the sk lock to be held when called */ |
1da177e4 LT |
536 | int bt_sock_wait_state(struct sock *sk, int state, unsigned long timeo) |
537 | { | |
538 | DECLARE_WAITQUEUE(wait, current); | |
539 | int err = 0; | |
540 | ||
541 | BT_DBG("sk %p", sk); | |
542 | ||
aa395145 | 543 | add_wait_queue(sk_sleep(sk), &wait); |
9be4e3fb | 544 | set_current_state(TASK_INTERRUPTIBLE); |
1da177e4 | 545 | while (sk->sk_state != state) { |
1da177e4 | 546 | if (!timeo) { |
b4c612a4 | 547 | err = -EINPROGRESS; |
1da177e4 LT |
548 | break; |
549 | } | |
550 | ||
551 | if (signal_pending(current)) { | |
552 | err = sock_intr_errno(timeo); | |
553 | break; | |
554 | } | |
555 | ||
556 | release_sock(sk); | |
557 | timeo = schedule_timeout(timeo); | |
558 | lock_sock(sk); | |
9be4e3fb | 559 | set_current_state(TASK_INTERRUPTIBLE); |
1da177e4 | 560 | |
c1cbe4b7 BL |
561 | err = sock_error(sk); |
562 | if (err) | |
1da177e4 | 563 | break; |
1da177e4 | 564 | } |
9be4e3fb | 565 | __set_current_state(TASK_RUNNING); |
aa395145 | 566 | remove_wait_queue(sk_sleep(sk), &wait); |
1da177e4 LT |
567 | return err; |
568 | } | |
569 | EXPORT_SYMBOL(bt_sock_wait_state); | |
570 | ||
e793dcf0 | 571 | /* This function expects the sk lock to be held when called */ |
da891217 | 572 | int bt_sock_wait_ready(struct sock *sk, unsigned int msg_flags) |
e793dcf0 JH |
573 | { |
574 | DECLARE_WAITQUEUE(wait, current); | |
575 | unsigned long timeo; | |
576 | int err = 0; | |
577 | ||
578 | BT_DBG("sk %p", sk); | |
579 | ||
da891217 | 580 | timeo = sock_sndtimeo(sk, !!(msg_flags & MSG_DONTWAIT)); |
e793dcf0 JH |
581 | |
582 | add_wait_queue(sk_sleep(sk), &wait); | |
583 | set_current_state(TASK_INTERRUPTIBLE); | |
584 | while (test_bit(BT_SK_SUSPEND, &bt_sk(sk)->flags)) { | |
585 | if (!timeo) { | |
586 | err = -EAGAIN; | |
587 | break; | |
588 | } | |
589 | ||
590 | if (signal_pending(current)) { | |
591 | err = sock_intr_errno(timeo); | |
592 | break; | |
593 | } | |
594 | ||
595 | release_sock(sk); | |
596 | timeo = schedule_timeout(timeo); | |
597 | lock_sock(sk); | |
598 | set_current_state(TASK_INTERRUPTIBLE); | |
599 | ||
600 | err = sock_error(sk); | |
601 | if (err) | |
602 | break; | |
603 | } | |
604 | __set_current_state(TASK_RUNNING); | |
605 | remove_wait_queue(sk_sleep(sk), &wait); | |
606 | ||
607 | return err; | |
608 | } | |
609 | EXPORT_SYMBOL(bt_sock_wait_ready); | |
610 | ||
256a06c8 | 611 | #ifdef CONFIG_PROC_FS |
256a06c8 MY |
612 | static void *bt_seq_start(struct seq_file *seq, loff_t *pos) |
613 | __acquires(seq->private->l->lock) | |
614 | { | |
359745d7 | 615 | struct bt_sock_list *l = pde_data(file_inode(seq->file)); |
256a06c8 MY |
616 | |
617 | read_lock(&l->lock); | |
618 | return seq_hlist_start_head(&l->head, *pos); | |
619 | } | |
620 | ||
621 | static void *bt_seq_next(struct seq_file *seq, void *v, loff_t *pos) | |
622 | { | |
359745d7 | 623 | struct bt_sock_list *l = pde_data(file_inode(seq->file)); |
256a06c8 MY |
624 | |
625 | return seq_hlist_next(v, &l->head, pos); | |
626 | } | |
627 | ||
628 | static void bt_seq_stop(struct seq_file *seq, void *v) | |
629 | __releases(seq->private->l->lock) | |
630 | { | |
359745d7 | 631 | struct bt_sock_list *l = pde_data(file_inode(seq->file)); |
256a06c8 MY |
632 | |
633 | read_unlock(&l->lock); | |
634 | } | |
635 | ||
636 | static int bt_seq_show(struct seq_file *seq, void *v) | |
637 | { | |
359745d7 | 638 | struct bt_sock_list *l = pde_data(file_inode(seq->file)); |
256a06c8 MY |
639 | |
640 | if (v == SEQ_START_TOKEN) { | |
b8ddc3b1 | 641 | seq_puts(seq, "sk RefCnt Rmem Wmem User Inode Parent"); |
256a06c8 MY |
642 | |
643 | if (l->custom_seq_show) { | |
644 | seq_putc(seq, ' '); | |
645 | l->custom_seq_show(seq, v); | |
646 | } | |
647 | ||
648 | seq_putc(seq, '\n'); | |
649 | } else { | |
09d5d4aa AE |
650 | struct sock *sk = sk_entry(v); |
651 | struct bt_sock *bt = bt_sk(sk); | |
256a06c8 | 652 | |
7028a886 | 653 | seq_printf(seq, |
5f6cd79f | 654 | "%pK %-6d %-6u %-6u %-6u %-6lu %-6lu", |
256a06c8 | 655 | sk, |
41c6d650 | 656 | refcount_read(&sk->sk_refcnt), |
256a06c8 MY |
657 | sk_rmem_alloc_get(sk), |
658 | sk_wmem_alloc_get(sk), | |
1bbb3095 | 659 | from_kuid(seq_user_ns(seq), sock_i_uid(sk)), |
256a06c8 | 660 | sock_i_ino(sk), |
b8ddc3b1 | 661 | bt->parent ? sock_i_ino(bt->parent) : 0LU); |
256a06c8 MY |
662 | |
663 | if (l->custom_seq_show) { | |
664 | seq_putc(seq, ' '); | |
665 | l->custom_seq_show(seq, v); | |
666 | } | |
667 | ||
668 | seq_putc(seq, '\n'); | |
669 | } | |
670 | return 0; | |
671 | } | |
672 | ||
26b0f4e2 | 673 | static const struct seq_operations bt_seq_ops = { |
256a06c8 MY |
674 | .start = bt_seq_start, |
675 | .next = bt_seq_next, | |
676 | .stop = bt_seq_stop, | |
677 | .show = bt_seq_show, | |
678 | }; | |
679 | ||
b0316615 | 680 | int bt_procfs_init(struct net *net, const char *name, |
f37590bd | 681 | struct bt_sock_list *sk_list, |
b8ddc3b1 | 682 | int (*seq_show)(struct seq_file *, void *)) |
256a06c8 | 683 | { |
256a06c8 MY |
684 | sk_list->custom_seq_show = seq_show; |
685 | ||
a9170e0a | 686 | if (!proc_create_seq_data(name, 0, net->proc_net, &bt_seq_ops, sk_list)) |
256a06c8 | 687 | return -ENOMEM; |
256a06c8 MY |
688 | return 0; |
689 | } | |
690 | ||
691 | void bt_procfs_cleanup(struct net *net, const char *name) | |
692 | { | |
ece31ffd | 693 | remove_proc_entry(name, net->proc_net); |
256a06c8 MY |
694 | } |
695 | #else | |
b0316615 | 696 | int bt_procfs_init(struct net *net, const char *name, |
f37590bd | 697 | struct bt_sock_list *sk_list, |
b8ddc3b1 | 698 | int (*seq_show)(struct seq_file *, void *)) |
256a06c8 MY |
699 | { |
700 | return 0; | |
701 | } | |
702 | ||
703 | void bt_procfs_cleanup(struct net *net, const char *name) | |
704 | { | |
705 | } | |
706 | #endif | |
707 | EXPORT_SYMBOL(bt_procfs_init); | |
708 | EXPORT_SYMBOL(bt_procfs_cleanup); | |
709 | ||
173e7837 | 710 | static const struct net_proto_family bt_sock_family_ops = { |
1da177e4 LT |
711 | .owner = THIS_MODULE, |
712 | .family = PF_BLUETOOTH, | |
713 | .create = bt_sock_create, | |
714 | }; | |
715 | ||
ffcecac6 MH |
716 | struct dentry *bt_debugfs; |
717 | EXPORT_SYMBOL_GPL(bt_debugfs); | |
718 | ||
9e8305b3 MH |
719 | #define VERSION __stringify(BT_SUBSYS_VERSION) "." \ |
720 | __stringify(BT_SUBSYS_REVISION) | |
721 | ||
1da177e4 LT |
722 | static int __init bt_init(void) |
723 | { | |
27d35284 MH |
724 | int err; |
725 | ||
b4772ef8 | 726 | sock_skb_cb_check_size(sizeof(struct bt_skb_cb)); |
7cb9d20f | 727 | |
9e8305b3 | 728 | BT_INFO("Core ver %s", VERSION); |
1da177e4 | 729 | |
ee485290 MH |
730 | err = bt_selftest(); |
731 | if (err < 0) | |
732 | return err; | |
733 | ||
ffcecac6 MH |
734 | bt_debugfs = debugfs_create_dir("bluetooth", NULL); |
735 | ||
e64c97b5 MH |
736 | bt_leds_init(); |
737 | ||
27d35284 MH |
738 | err = bt_sysfs_init(); |
739 | if (err < 0) | |
2f3957c7 | 740 | goto cleanup_led; |
1da177e4 | 741 | |
27d35284 | 742 | err = sock_register(&bt_sock_family_ops); |
1b259904 ME |
743 | if (err) |
744 | goto cleanup_sysfs; | |
1da177e4 | 745 | |
27d35284 | 746 | BT_INFO("HCI device and connection manager initialized"); |
1da177e4 | 747 | |
64274518 | 748 | err = hci_sock_init(); |
1b259904 ME |
749 | if (err) |
750 | goto unregister_socket; | |
64274518 GP |
751 | |
752 | err = l2cap_init(); | |
1b259904 ME |
753 | if (err) |
754 | goto cleanup_socket; | |
64274518 GP |
755 | |
756 | err = sco_init(); | |
1b259904 ME |
757 | if (err) |
758 | goto cleanup_cap; | |
1da177e4 | 759 | |
6d785aa3 | 760 | err = mgmt_init(); |
1b259904 ME |
761 | if (err) |
762 | goto cleanup_sco; | |
6d785aa3 | 763 | |
1da177e4 | 764 | return 0; |
64274518 | 765 | |
1b259904 ME |
766 | cleanup_sco: |
767 | sco_exit(); | |
768 | cleanup_cap: | |
769 | l2cap_exit(); | |
770 | cleanup_socket: | |
64274518 | 771 | hci_sock_cleanup(); |
1b259904 | 772 | unregister_socket: |
64274518 | 773 | sock_unregister(PF_BLUETOOTH); |
1b259904 | 774 | cleanup_sysfs: |
64274518 | 775 | bt_sysfs_cleanup(); |
2f3957c7 CZ |
776 | cleanup_led: |
777 | bt_leds_cleanup(); | |
64274518 | 778 | return err; |
1da177e4 LT |
779 | } |
780 | ||
781 | static void __exit bt_exit(void) | |
782 | { | |
6d785aa3 JH |
783 | mgmt_exit(); |
784 | ||
64274518 GP |
785 | sco_exit(); |
786 | ||
787 | l2cap_exit(); | |
788 | ||
1da177e4 LT |
789 | hci_sock_cleanup(); |
790 | ||
1da177e4 | 791 | sock_unregister(PF_BLUETOOTH); |
27d35284 MH |
792 | |
793 | bt_sysfs_cleanup(); | |
ffcecac6 | 794 | |
e64c97b5 MH |
795 | bt_leds_cleanup(); |
796 | ||
ffcecac6 | 797 | debugfs_remove_recursive(bt_debugfs); |
1da177e4 LT |
798 | } |
799 | ||
800 | subsys_initcall(bt_init); | |
801 | module_exit(bt_exit); | |
802 | ||
63fbd24e | 803 | MODULE_AUTHOR("Marcel Holtmann <marcel@holtmann.org>"); |
9e8305b3 MH |
804 | MODULE_DESCRIPTION("Bluetooth Core ver " VERSION); |
805 | MODULE_VERSION(VERSION); | |
1da177e4 LT |
806 | MODULE_LICENSE("GPL"); |
807 | MODULE_ALIAS_NETPROTO(PF_BLUETOOTH); |