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 | ||
7bafcbf5 RL |
111 | #ifdef CONFIG_PARANOID_NETWORK |
112 | static inline int current_has_bt_admin(void) | |
113 | { | |
114 | return !current_euid(); | |
115 | } | |
116 | ||
117 | static inline int current_has_bt(void) | |
118 | { | |
119 | return current_has_bt_admin(); | |
120 | } | |
121 | # else | |
122 | static inline int current_has_bt_admin(void) | |
123 | { | |
124 | return 1; | |
125 | } | |
126 | ||
127 | static inline int current_has_bt(void) | |
128 | { | |
129 | return 1; | |
130 | } | |
131 | #endif | |
132 | ||
3f378b68 EP |
133 | static int bt_sock_create(struct net *net, struct socket *sock, int proto, |
134 | int kern) | |
1da177e4 | 135 | { |
74da626a | 136 | int err; |
1da177e4 | 137 | |
7bafcbf5 RL |
138 | if (proto == BTPROTO_RFCOMM || proto == BTPROTO_SCO || |
139 | proto == BTPROTO_L2CAP) { | |
140 | if (!current_has_bt()) | |
141 | return -EPERM; | |
142 | } else if (!current_has_bt_admin()) | |
143 | return -EPERM; | |
144 | ||
1b8d7ae4 EB |
145 | if (net != &init_net) |
146 | return -EAFNOSUPPORT; | |
147 | ||
1da177e4 LT |
148 | if (proto < 0 || proto >= BT_MAX_PROTO) |
149 | return -EINVAL; | |
150 | ||
95a5afca | 151 | if (!bt_proto[proto]) |
1da177e4 | 152 | request_module("bt-proto-%d", proto); |
74da626a | 153 | |
1da177e4 | 154 | err = -EPROTONOSUPPORT; |
74da626a MH |
155 | |
156 | read_lock(&bt_proto_lock); | |
157 | ||
1da177e4 | 158 | if (bt_proto[proto] && try_module_get(bt_proto[proto]->owner)) { |
3f378b68 | 159 | err = bt_proto[proto]->create(net, sock, proto, kern); |
b5a30dda OP |
160 | if (!err) |
161 | bt_sock_reclassify_lock(sock->sk, proto); | |
1da177e4 LT |
162 | module_put(bt_proto[proto]->owner); |
163 | } | |
74da626a MH |
164 | |
165 | read_unlock(&bt_proto_lock); | |
166 | ||
8e87d142 | 167 | return err; |
1da177e4 LT |
168 | } |
169 | ||
170 | void bt_sock_link(struct bt_sock_list *l, struct sock *sk) | |
171 | { | |
94f5bfb8 | 172 | write_lock(&l->lock); |
1da177e4 | 173 | sk_add_node(sk, &l->head); |
94f5bfb8 | 174 | write_unlock(&l->lock); |
1da177e4 LT |
175 | } |
176 | EXPORT_SYMBOL(bt_sock_link); | |
177 | ||
178 | void bt_sock_unlink(struct bt_sock_list *l, struct sock *sk) | |
179 | { | |
94f5bfb8 | 180 | write_lock(&l->lock); |
1da177e4 | 181 | sk_del_node_init(sk); |
94f5bfb8 | 182 | write_unlock(&l->lock); |
1da177e4 LT |
183 | } |
184 | EXPORT_SYMBOL(bt_sock_unlink); | |
185 | ||
82c73d48 | 186 | void bt_accept_enqueue(struct sock *parent, struct sock *sk, bool bh) |
1da177e4 LT |
187 | { |
188 | BT_DBG("parent %p, sk %p", parent, sk); | |
189 | ||
190 | sock_hold(sk); | |
82c73d48 MK |
191 | |
192 | if (bh) | |
193 | bh_lock_sock_nested(sk); | |
194 | else | |
195 | lock_sock_nested(sk, SINGLE_DEPTH_NESTING); | |
196 | ||
1da177e4 LT |
197 | list_add_tail(&bt_sk(sk)->accept_q, &bt_sk(parent)->accept_q); |
198 | bt_sk(sk)->parent = parent; | |
82c73d48 MK |
199 | |
200 | if (bh) | |
201 | bh_unlock_sock(sk); | |
202 | else | |
203 | release_sock(sk); | |
204 | ||
1da177e4 LT |
205 | parent->sk_ack_backlog++; |
206 | } | |
207 | EXPORT_SYMBOL(bt_accept_enqueue); | |
208 | ||
27bfbc21 DJ |
209 | /* Calling function must hold the sk lock. |
210 | * bt_sk(sk)->parent must be non-NULL meaning sk is in the parent list. | |
211 | */ | |
1da177e4 LT |
212 | void bt_accept_unlink(struct sock *sk) |
213 | { | |
214 | BT_DBG("sk %p state %d", sk, sk->sk_state); | |
215 | ||
216 | list_del_init(&bt_sk(sk)->accept_q); | |
217 | bt_sk(sk)->parent->sk_ack_backlog--; | |
218 | bt_sk(sk)->parent = NULL; | |
219 | sock_put(sk); | |
220 | } | |
221 | EXPORT_SYMBOL(bt_accept_unlink); | |
222 | ||
223 | struct sock *bt_accept_dequeue(struct sock *parent, struct socket *newsock) | |
224 | { | |
7eb7404f | 225 | struct bt_sock *s, *n; |
1da177e4 LT |
226 | struct sock *sk; |
227 | ||
228 | BT_DBG("parent %p", parent); | |
229 | ||
27bfbc21 | 230 | restart: |
7eb7404f GT |
231 | list_for_each_entry_safe(s, n, &bt_sk(parent)->accept_q, accept_q) { |
232 | sk = (struct sock *)s; | |
1da177e4 | 233 | |
27bfbc21 DJ |
234 | /* Prevent early freeing of sk due to unlink and sock_kill */ |
235 | sock_hold(sk); | |
8a154a8f | 236 | lock_sock(sk); |
1da177e4 | 237 | |
27bfbc21 DJ |
238 | /* Check sk has not already been unlinked via |
239 | * bt_accept_unlink() due to serialisation caused by sk locking | |
240 | */ | |
241 | if (!bt_sk(sk)->parent) { | |
242 | BT_DBG("sk %p, already unlinked", sk); | |
243 | release_sock(sk); | |
244 | sock_put(sk); | |
245 | ||
246 | /* Restart the loop as sk is no longer in the list | |
247 | * and also avoid a potential infinite loop because | |
248 | * list_for_each_entry_safe() is not thread safe. | |
249 | */ | |
250 | goto restart; | |
251 | } | |
252 | ||
253 | /* sk is safely in the parent list so reduce reference count */ | |
254 | sock_put(sk); | |
255 | ||
1da177e4 LT |
256 | /* FIXME: Is this check still needed */ |
257 | if (sk->sk_state == BT_CLOSED) { | |
1da177e4 | 258 | bt_accept_unlink(sk); |
1a11ec89 | 259 | release_sock(sk); |
1da177e4 LT |
260 | continue; |
261 | } | |
262 | ||
c4f912e1 | 263 | if (sk->sk_state == BT_CONNECTED || !newsock || |
d060991f | 264 | test_bit(BT_SK_DEFER_SETUP, &bt_sk(parent)->flags)) { |
1da177e4 LT |
265 | bt_accept_unlink(sk); |
266 | if (newsock) | |
267 | sock_graft(sk, newsock); | |
d37f50e1 | 268 | |
8a154a8f | 269 | release_sock(sk); |
1da177e4 LT |
270 | return sk; |
271 | } | |
272 | ||
8a154a8f | 273 | release_sock(sk); |
1da177e4 | 274 | } |
d37f50e1 | 275 | |
1da177e4 LT |
276 | return NULL; |
277 | } | |
278 | EXPORT_SYMBOL(bt_accept_dequeue); | |
279 | ||
1b784140 YX |
280 | int bt_sock_recvmsg(struct socket *sock, struct msghdr *msg, size_t len, |
281 | int flags) | |
1da177e4 LT |
282 | { |
283 | int noblock = flags & MSG_DONTWAIT; | |
284 | struct sock *sk = sock->sk; | |
285 | struct sk_buff *skb; | |
286 | size_t copied; | |
b5f34f94 | 287 | size_t skblen; |
1da177e4 LT |
288 | int err; |
289 | ||
a418b893 | 290 | BT_DBG("sock %p sk %p len %zu", sock, sk, len); |
1da177e4 | 291 | |
d94a6104 | 292 | if (flags & MSG_OOB) |
1da177e4 LT |
293 | return -EOPNOTSUPP; |
294 | ||
5a08ecce AE |
295 | skb = skb_recv_datagram(sk, flags, noblock, &err); |
296 | if (!skb) { | |
f3d33426 | 297 | if (sk->sk_shutdown & RCV_SHUTDOWN) |
1da177e4 | 298 | return 0; |
f3d33426 | 299 | |
1da177e4 LT |
300 | return err; |
301 | } | |
302 | ||
b5f34f94 | 303 | skblen = skb->len; |
1da177e4 LT |
304 | copied = skb->len; |
305 | if (len < copied) { | |
306 | msg->msg_flags |= MSG_TRUNC; | |
307 | copied = len; | |
308 | } | |
309 | ||
badff6d0 | 310 | skb_reset_transport_header(skb); |
51f3d02b | 311 | err = skb_copy_datagram_msg(skb, 0, msg, copied); |
d9763698 | 312 | if (err == 0) { |
3b885787 | 313 | sock_recv_ts_and_drops(msg, sk, skb); |
1da177e4 | 314 | |
9dcbc313 | 315 | if (msg->msg_name && bt_sk(sk)->skb_msg_name) |
d9763698 MH |
316 | bt_sk(sk)->skb_msg_name(skb, msg->msg_name, |
317 | &msg->msg_namelen); | |
d9763698 MH |
318 | } |
319 | ||
1da177e4 LT |
320 | skb_free_datagram(sk, skb); |
321 | ||
90a56f72 | 322 | if (flags & MSG_TRUNC) |
b5f34f94 DK |
323 | copied = skblen; |
324 | ||
1da177e4 LT |
325 | return err ? : copied; |
326 | } | |
327 | EXPORT_SYMBOL(bt_sock_recvmsg); | |
328 | ||
796c86ee MM |
329 | static long bt_sock_data_wait(struct sock *sk, long timeo) |
330 | { | |
331 | DECLARE_WAITQUEUE(wait, current); | |
332 | ||
333 | add_wait_queue(sk_sleep(sk), &wait); | |
334 | for (;;) { | |
335 | set_current_state(TASK_INTERRUPTIBLE); | |
336 | ||
337 | if (!skb_queue_empty(&sk->sk_receive_queue)) | |
338 | break; | |
339 | ||
340 | if (sk->sk_err || (sk->sk_shutdown & RCV_SHUTDOWN)) | |
341 | break; | |
342 | ||
343 | if (signal_pending(current) || !timeo) | |
344 | break; | |
345 | ||
9cd3e072 | 346 | sk_set_bit(SOCKWQ_ASYNC_WAITDATA, sk); |
796c86ee MM |
347 | release_sock(sk); |
348 | timeo = schedule_timeout(timeo); | |
349 | lock_sock(sk); | |
9cd3e072 | 350 | sk_clear_bit(SOCKWQ_ASYNC_WAITDATA, sk); |
796c86ee MM |
351 | } |
352 | ||
353 | __set_current_state(TASK_RUNNING); | |
354 | remove_wait_queue(sk_sleep(sk), &wait); | |
355 | return timeo; | |
356 | } | |
357 | ||
1b784140 YX |
358 | int bt_sock_stream_recvmsg(struct socket *sock, struct msghdr *msg, |
359 | size_t size, int flags) | |
796c86ee MM |
360 | { |
361 | struct sock *sk = sock->sk; | |
362 | int err = 0; | |
363 | size_t target, copied = 0; | |
364 | long timeo; | |
365 | ||
366 | if (flags & MSG_OOB) | |
367 | return -EOPNOTSUPP; | |
368 | ||
796c86ee MM |
369 | BT_DBG("sk %p size %zu", sk, size); |
370 | ||
371 | lock_sock(sk); | |
372 | ||
373 | target = sock_rcvlowat(sk, flags & MSG_WAITALL, size); | |
374 | timeo = sock_rcvtimeo(sk, flags & MSG_DONTWAIT); | |
375 | ||
376 | do { | |
377 | struct sk_buff *skb; | |
378 | int chunk; | |
379 | ||
380 | skb = skb_dequeue(&sk->sk_receive_queue); | |
381 | if (!skb) { | |
382 | if (copied >= target) | |
383 | break; | |
384 | ||
5a08ecce AE |
385 | err = sock_error(sk); |
386 | if (err) | |
796c86ee MM |
387 | break; |
388 | if (sk->sk_shutdown & RCV_SHUTDOWN) | |
389 | break; | |
390 | ||
391 | err = -EAGAIN; | |
392 | if (!timeo) | |
393 | break; | |
394 | ||
395 | timeo = bt_sock_data_wait(sk, timeo); | |
396 | ||
397 | if (signal_pending(current)) { | |
398 | err = sock_intr_errno(timeo); | |
399 | goto out; | |
400 | } | |
401 | continue; | |
402 | } | |
403 | ||
404 | chunk = min_t(unsigned int, skb->len, size); | |
51f3d02b | 405 | if (skb_copy_datagram_msg(skb, 0, msg, chunk)) { |
796c86ee MM |
406 | skb_queue_head(&sk->sk_receive_queue, skb); |
407 | if (!copied) | |
408 | copied = -EFAULT; | |
409 | break; | |
410 | } | |
411 | copied += chunk; | |
412 | size -= chunk; | |
413 | ||
414 | sock_recv_ts_and_drops(msg, sk, skb); | |
415 | ||
416 | if (!(flags & MSG_PEEK)) { | |
5b668eb3 MM |
417 | int skb_len = skb_headlen(skb); |
418 | ||
419 | if (chunk <= skb_len) { | |
420 | __skb_pull(skb, chunk); | |
421 | } else { | |
422 | struct sk_buff *frag; | |
423 | ||
424 | __skb_pull(skb, skb_len); | |
425 | chunk -= skb_len; | |
426 | ||
427 | skb_walk_frags(skb, frag) { | |
428 | if (chunk <= frag->len) { | |
429 | /* Pulling partial data */ | |
430 | skb->len -= chunk; | |
431 | skb->data_len -= chunk; | |
432 | __skb_pull(frag, chunk); | |
433 | break; | |
434 | } else if (frag->len) { | |
435 | /* Pulling all frag data */ | |
436 | chunk -= frag->len; | |
437 | skb->len -= frag->len; | |
438 | skb->data_len -= frag->len; | |
439 | __skb_pull(frag, frag->len); | |
440 | } | |
441 | } | |
442 | } | |
443 | ||
796c86ee MM |
444 | if (skb->len) { |
445 | skb_queue_head(&sk->sk_receive_queue, skb); | |
446 | break; | |
447 | } | |
448 | kfree_skb(skb); | |
449 | ||
450 | } else { | |
451 | /* put message back and return */ | |
452 | skb_queue_head(&sk->sk_receive_queue, skb); | |
453 | break; | |
454 | } | |
455 | } while (size); | |
456 | ||
457 | out: | |
458 | release_sock(sk); | |
459 | return copied ? : err; | |
460 | } | |
461 | EXPORT_SYMBOL(bt_sock_stream_recvmsg); | |
462 | ||
1da177e4 LT |
463 | static inline unsigned int bt_accept_poll(struct sock *parent) |
464 | { | |
7eb7404f | 465 | struct bt_sock *s, *n; |
1da177e4 LT |
466 | struct sock *sk; |
467 | ||
7eb7404f GT |
468 | list_for_each_entry_safe(s, n, &bt_sk(parent)->accept_q, accept_q) { |
469 | sk = (struct sock *)s; | |
d5f2d2be | 470 | if (sk->sk_state == BT_CONNECTED || |
c5daa683 GP |
471 | (test_bit(BT_SK_DEFER_SETUP, &bt_sk(parent)->flags) && |
472 | sk->sk_state == BT_CONNECT2)) | |
1da177e4 LT |
473 | return POLLIN | POLLRDNORM; |
474 | } | |
475 | ||
476 | return 0; | |
477 | } | |
478 | ||
8fc9ced3 GP |
479 | unsigned int bt_sock_poll(struct file *file, struct socket *sock, |
480 | poll_table *wait) | |
1da177e4 LT |
481 | { |
482 | struct sock *sk = sock->sk; | |
483 | unsigned int mask = 0; | |
484 | ||
485 | BT_DBG("sock %p, sk %p", sock, sk); | |
486 | ||
aa395145 | 487 | poll_wait(file, sk_sleep(sk), wait); |
1da177e4 LT |
488 | |
489 | if (sk->sk_state == BT_LISTEN) | |
490 | return bt_accept_poll(sk); | |
491 | ||
492 | if (sk->sk_err || !skb_queue_empty(&sk->sk_error_queue)) | |
7d4c04fc | 493 | mask |= POLLERR | |
8facd5fb | 494 | (sock_flag(sk, SOCK_SELECT_ERR_QUEUE) ? POLLPRI : 0); |
1da177e4 | 495 | |
f348d70a | 496 | if (sk->sk_shutdown & RCV_SHUTDOWN) |
db40980f | 497 | mask |= POLLRDHUP | POLLIN | POLLRDNORM; |
f348d70a | 498 | |
1da177e4 LT |
499 | if (sk->sk_shutdown == SHUTDOWN_MASK) |
500 | mask |= POLLHUP; | |
501 | ||
db40980f | 502 | if (!skb_queue_empty(&sk->sk_receive_queue)) |
1da177e4 LT |
503 | mask |= POLLIN | POLLRDNORM; |
504 | ||
505 | if (sk->sk_state == BT_CLOSED) | |
506 | mask |= POLLHUP; | |
507 | ||
508 | if (sk->sk_state == BT_CONNECT || | |
509 | sk->sk_state == BT_CONNECT2 || | |
510 | sk->sk_state == BT_CONFIG) | |
511 | return mask; | |
512 | ||
c5daa683 | 513 | if (!test_bit(BT_SK_SUSPEND, &bt_sk(sk)->flags) && sock_writeable(sk)) |
1da177e4 LT |
514 | mask |= POLLOUT | POLLWRNORM | POLLWRBAND; |
515 | else | |
9cd3e072 | 516 | sk_set_bit(SOCKWQ_ASYNC_NOSPACE, sk); |
1da177e4 LT |
517 | |
518 | return mask; | |
519 | } | |
520 | EXPORT_SYMBOL(bt_sock_poll); | |
521 | ||
3241ad82 MH |
522 | int bt_sock_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg) |
523 | { | |
524 | struct sock *sk = sock->sk; | |
43cbeee9 MH |
525 | struct sk_buff *skb; |
526 | long amount; | |
3241ad82 MH |
527 | int err; |
528 | ||
529 | BT_DBG("sk %p cmd %x arg %lx", sk, cmd, arg); | |
530 | ||
531 | switch (cmd) { | |
43cbeee9 MH |
532 | case TIOCOUTQ: |
533 | if (sk->sk_state == BT_LISTEN) | |
534 | return -EINVAL; | |
535 | ||
31e6d363 | 536 | amount = sk->sk_sndbuf - sk_wmem_alloc_get(sk); |
43cbeee9 MH |
537 | if (amount < 0) |
538 | amount = 0; | |
539 | err = put_user(amount, (int __user *) arg); | |
540 | break; | |
541 | ||
542 | case TIOCINQ: | |
543 | if (sk->sk_state == BT_LISTEN) | |
544 | return -EINVAL; | |
545 | ||
546 | lock_sock(sk); | |
547 | skb = skb_peek(&sk->sk_receive_queue); | |
548 | amount = skb ? skb->len : 0; | |
549 | release_sock(sk); | |
550 | err = put_user(amount, (int __user *) arg); | |
551 | break; | |
552 | ||
3241ad82 MH |
553 | case SIOCGSTAMP: |
554 | err = sock_get_timestamp(sk, (struct timeval __user *) arg); | |
555 | break; | |
556 | ||
557 | case SIOCGSTAMPNS: | |
558 | err = sock_get_timestampns(sk, (struct timespec __user *) arg); | |
559 | break; | |
560 | ||
561 | default: | |
562 | err = -ENOIOCTLCMD; | |
563 | break; | |
564 | } | |
565 | ||
566 | return err; | |
567 | } | |
568 | EXPORT_SYMBOL(bt_sock_ioctl); | |
569 | ||
0fba96f9 | 570 | /* This function expects the sk lock to be held when called */ |
1da177e4 LT |
571 | int bt_sock_wait_state(struct sock *sk, int state, unsigned long timeo) |
572 | { | |
573 | DECLARE_WAITQUEUE(wait, current); | |
574 | int err = 0; | |
575 | ||
576 | BT_DBG("sk %p", sk); | |
577 | ||
aa395145 | 578 | add_wait_queue(sk_sleep(sk), &wait); |
9be4e3fb | 579 | set_current_state(TASK_INTERRUPTIBLE); |
1da177e4 | 580 | while (sk->sk_state != state) { |
1da177e4 | 581 | if (!timeo) { |
b4c612a4 | 582 | err = -EINPROGRESS; |
1da177e4 LT |
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); | |
9be4e3fb | 594 | set_current_state(TASK_INTERRUPTIBLE); |
1da177e4 | 595 | |
c1cbe4b7 BL |
596 | err = sock_error(sk); |
597 | if (err) | |
1da177e4 | 598 | break; |
1da177e4 | 599 | } |
9be4e3fb | 600 | __set_current_state(TASK_RUNNING); |
aa395145 | 601 | remove_wait_queue(sk_sleep(sk), &wait); |
1da177e4 LT |
602 | return err; |
603 | } | |
604 | EXPORT_SYMBOL(bt_sock_wait_state); | |
605 | ||
e793dcf0 JH |
606 | /* This function expects the sk lock to be held when called */ |
607 | int bt_sock_wait_ready(struct sock *sk, unsigned long flags) | |
608 | { | |
609 | DECLARE_WAITQUEUE(wait, current); | |
610 | unsigned long timeo; | |
611 | int err = 0; | |
612 | ||
613 | BT_DBG("sk %p", sk); | |
614 | ||
615 | timeo = sock_sndtimeo(sk, flags & O_NONBLOCK); | |
616 | ||
617 | add_wait_queue(sk_sleep(sk), &wait); | |
618 | set_current_state(TASK_INTERRUPTIBLE); | |
619 | while (test_bit(BT_SK_SUSPEND, &bt_sk(sk)->flags)) { | |
620 | if (!timeo) { | |
621 | err = -EAGAIN; | |
622 | break; | |
623 | } | |
624 | ||
625 | if (signal_pending(current)) { | |
626 | err = sock_intr_errno(timeo); | |
627 | break; | |
628 | } | |
629 | ||
630 | release_sock(sk); | |
631 | timeo = schedule_timeout(timeo); | |
632 | lock_sock(sk); | |
633 | set_current_state(TASK_INTERRUPTIBLE); | |
634 | ||
635 | err = sock_error(sk); | |
636 | if (err) | |
637 | break; | |
638 | } | |
639 | __set_current_state(TASK_RUNNING); | |
640 | remove_wait_queue(sk_sleep(sk), &wait); | |
641 | ||
642 | return err; | |
643 | } | |
644 | EXPORT_SYMBOL(bt_sock_wait_ready); | |
645 | ||
256a06c8 MY |
646 | #ifdef CONFIG_PROC_FS |
647 | struct bt_seq_state { | |
648 | struct bt_sock_list *l; | |
649 | }; | |
650 | ||
651 | static void *bt_seq_start(struct seq_file *seq, loff_t *pos) | |
652 | __acquires(seq->private->l->lock) | |
653 | { | |
654 | struct bt_seq_state *s = seq->private; | |
655 | struct bt_sock_list *l = s->l; | |
656 | ||
657 | read_lock(&l->lock); | |
658 | return seq_hlist_start_head(&l->head, *pos); | |
659 | } | |
660 | ||
661 | static void *bt_seq_next(struct seq_file *seq, void *v, loff_t *pos) | |
662 | { | |
663 | struct bt_seq_state *s = seq->private; | |
664 | struct bt_sock_list *l = s->l; | |
665 | ||
666 | return seq_hlist_next(v, &l->head, pos); | |
667 | } | |
668 | ||
669 | static void bt_seq_stop(struct seq_file *seq, void *v) | |
670 | __releases(seq->private->l->lock) | |
671 | { | |
672 | struct bt_seq_state *s = seq->private; | |
673 | struct bt_sock_list *l = s->l; | |
674 | ||
675 | read_unlock(&l->lock); | |
676 | } | |
677 | ||
678 | static int bt_seq_show(struct seq_file *seq, void *v) | |
679 | { | |
256a06c8 MY |
680 | struct bt_seq_state *s = seq->private; |
681 | struct bt_sock_list *l = s->l; | |
256a06c8 MY |
682 | |
683 | if (v == SEQ_START_TOKEN) { | |
c5605755 | 684 | seq_puts(seq ,"sk RefCnt Rmem Wmem User Inode Parent"); |
256a06c8 MY |
685 | |
686 | if (l->custom_seq_show) { | |
687 | seq_putc(seq, ' '); | |
688 | l->custom_seq_show(seq, v); | |
689 | } | |
690 | ||
691 | seq_putc(seq, '\n'); | |
692 | } else { | |
09d5d4aa AE |
693 | struct sock *sk = sk_entry(v); |
694 | struct bt_sock *bt = bt_sk(sk); | |
256a06c8 | 695 | |
7028a886 | 696 | seq_printf(seq, |
5f6cd79f | 697 | "%pK %-6d %-6u %-6u %-6u %-6lu %-6lu", |
256a06c8 | 698 | sk, |
41c6d650 | 699 | refcount_read(&sk->sk_refcnt), |
256a06c8 MY |
700 | sk_rmem_alloc_get(sk), |
701 | sk_wmem_alloc_get(sk), | |
1bbb3095 | 702 | from_kuid(seq_user_ns(seq), sock_i_uid(sk)), |
256a06c8 | 703 | sock_i_ino(sk), |
256a06c8 MY |
704 | bt->parent? sock_i_ino(bt->parent): 0LU); |
705 | ||
706 | if (l->custom_seq_show) { | |
707 | seq_putc(seq, ' '); | |
708 | l->custom_seq_show(seq, v); | |
709 | } | |
710 | ||
711 | seq_putc(seq, '\n'); | |
712 | } | |
713 | return 0; | |
714 | } | |
715 | ||
26b0f4e2 | 716 | static const struct seq_operations bt_seq_ops = { |
256a06c8 MY |
717 | .start = bt_seq_start, |
718 | .next = bt_seq_next, | |
719 | .stop = bt_seq_stop, | |
720 | .show = bt_seq_show, | |
721 | }; | |
722 | ||
723 | static int bt_seq_open(struct inode *inode, struct file *file) | |
724 | { | |
725 | struct bt_sock_list *sk_list; | |
726 | struct bt_seq_state *s; | |
727 | ||
d9dda78b | 728 | sk_list = PDE_DATA(inode); |
256a06c8 MY |
729 | s = __seq_open_private(file, &bt_seq_ops, |
730 | sizeof(struct bt_seq_state)); | |
31f47073 | 731 | if (!s) |
256a06c8 MY |
732 | return -ENOMEM; |
733 | ||
734 | s->l = sk_list; | |
735 | return 0; | |
736 | } | |
737 | ||
14805359 AV |
738 | static const struct file_operations bt_fops = { |
739 | .open = bt_seq_open, | |
740 | .read = seq_read, | |
741 | .llseek = seq_lseek, | |
742 | .release = seq_release_private | |
743 | }; | |
744 | ||
b0316615 | 745 | int bt_procfs_init(struct net *net, const char *name, |
f37590bd | 746 | struct bt_sock_list *sk_list, |
256a06c8 MY |
747 | int (* seq_show)(struct seq_file *, void *)) |
748 | { | |
256a06c8 MY |
749 | sk_list->custom_seq_show = seq_show; |
750 | ||
4d006263 | 751 | if (!proc_create_data(name, 0, net->proc_net, &bt_fops, sk_list)) |
256a06c8 | 752 | return -ENOMEM; |
256a06c8 MY |
753 | return 0; |
754 | } | |
755 | ||
756 | void bt_procfs_cleanup(struct net *net, const char *name) | |
757 | { | |
ece31ffd | 758 | remove_proc_entry(name, net->proc_net); |
256a06c8 MY |
759 | } |
760 | #else | |
b0316615 | 761 | int bt_procfs_init(struct net *net, const char *name, |
f37590bd | 762 | struct bt_sock_list *sk_list, |
256a06c8 MY |
763 | int (* seq_show)(struct seq_file *, void *)) |
764 | { | |
765 | return 0; | |
766 | } | |
767 | ||
768 | void bt_procfs_cleanup(struct net *net, const char *name) | |
769 | { | |
770 | } | |
771 | #endif | |
772 | EXPORT_SYMBOL(bt_procfs_init); | |
773 | EXPORT_SYMBOL(bt_procfs_cleanup); | |
774 | ||
173e7837 | 775 | static const struct net_proto_family bt_sock_family_ops = { |
1da177e4 LT |
776 | .owner = THIS_MODULE, |
777 | .family = PF_BLUETOOTH, | |
778 | .create = bt_sock_create, | |
779 | }; | |
780 | ||
ffcecac6 MH |
781 | struct dentry *bt_debugfs; |
782 | EXPORT_SYMBOL_GPL(bt_debugfs); | |
783 | ||
9e8305b3 MH |
784 | #define VERSION __stringify(BT_SUBSYS_VERSION) "." \ |
785 | __stringify(BT_SUBSYS_REVISION) | |
786 | ||
1da177e4 LT |
787 | static int __init bt_init(void) |
788 | { | |
27d35284 MH |
789 | int err; |
790 | ||
b4772ef8 | 791 | sock_skb_cb_check_size(sizeof(struct bt_skb_cb)); |
7cb9d20f | 792 | |
9e8305b3 | 793 | BT_INFO("Core ver %s", VERSION); |
1da177e4 | 794 | |
ee485290 MH |
795 | err = bt_selftest(); |
796 | if (err < 0) | |
797 | return err; | |
798 | ||
ffcecac6 MH |
799 | bt_debugfs = debugfs_create_dir("bluetooth", NULL); |
800 | ||
e64c97b5 MH |
801 | bt_leds_init(); |
802 | ||
27d35284 MH |
803 | err = bt_sysfs_init(); |
804 | if (err < 0) | |
805 | return err; | |
1da177e4 | 806 | |
27d35284 MH |
807 | err = sock_register(&bt_sock_family_ops); |
808 | if (err < 0) { | |
809 | bt_sysfs_cleanup(); | |
810 | return err; | |
811 | } | |
1da177e4 | 812 | |
27d35284 | 813 | BT_INFO("HCI device and connection manager initialized"); |
1da177e4 | 814 | |
64274518 GP |
815 | err = hci_sock_init(); |
816 | if (err < 0) | |
817 | goto error; | |
818 | ||
819 | err = l2cap_init(); | |
0ed54dad | 820 | if (err < 0) |
64274518 | 821 | goto sock_err; |
64274518 GP |
822 | |
823 | err = sco_init(); | |
824 | if (err < 0) { | |
825 | l2cap_exit(); | |
826 | goto sock_err; | |
827 | } | |
1da177e4 | 828 | |
6d785aa3 JH |
829 | err = mgmt_init(); |
830 | if (err < 0) { | |
831 | sco_exit(); | |
832 | l2cap_exit(); | |
833 | goto sock_err; | |
834 | } | |
835 | ||
1da177e4 | 836 | return 0; |
64274518 GP |
837 | |
838 | sock_err: | |
839 | hci_sock_cleanup(); | |
840 | ||
841 | error: | |
842 | sock_unregister(PF_BLUETOOTH); | |
843 | bt_sysfs_cleanup(); | |
844 | ||
845 | return err; | |
1da177e4 LT |
846 | } |
847 | ||
848 | static void __exit bt_exit(void) | |
849 | { | |
6d785aa3 JH |
850 | mgmt_exit(); |
851 | ||
64274518 GP |
852 | sco_exit(); |
853 | ||
854 | l2cap_exit(); | |
855 | ||
1da177e4 LT |
856 | hci_sock_cleanup(); |
857 | ||
1da177e4 | 858 | sock_unregister(PF_BLUETOOTH); |
27d35284 MH |
859 | |
860 | bt_sysfs_cleanup(); | |
ffcecac6 | 861 | |
e64c97b5 MH |
862 | bt_leds_cleanup(); |
863 | ||
ffcecac6 | 864 | debugfs_remove_recursive(bt_debugfs); |
1da177e4 LT |
865 | } |
866 | ||
867 | subsys_initcall(bt_init); | |
868 | module_exit(bt_exit); | |
869 | ||
63fbd24e | 870 | MODULE_AUTHOR("Marcel Holtmann <marcel@holtmann.org>"); |
9e8305b3 MH |
871 | MODULE_DESCRIPTION("Bluetooth Core ver " VERSION); |
872 | MODULE_VERSION(VERSION); | |
1da177e4 LT |
873 | MODULE_LICENSE("GPL"); |
874 | MODULE_ALIAS_NETPROTO(PF_BLUETOOTH); |