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Commit | Line | Data |
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1 | /* net/atm/svc.c - ATM SVC sockets */ | |
2 | ||
3 | /* Written 1995-2000 by Werner Almesberger, EPFL LRC/ICA */ | |
4 | ||
5 | #define pr_fmt(fmt) KBUILD_MODNAME ":%s: " fmt, __func__ | |
6 | ||
7 | #include <linux/string.h> | |
8 | #include <linux/net.h> /* struct socket, struct proto_ops */ | |
9 | #include <linux/errno.h> /* error codes */ | |
10 | #include <linux/kernel.h> /* printk */ | |
11 | #include <linux/skbuff.h> | |
12 | #include <linux/wait.h> | |
13 | #include <linux/sched/signal.h> | |
14 | #include <linux/fcntl.h> /* O_NONBLOCK */ | |
15 | #include <linux/init.h> | |
16 | #include <linux/atm.h> /* ATM stuff */ | |
17 | #include <linux/atmsap.h> | |
18 | #include <linux/atmsvc.h> | |
19 | #include <linux/atmdev.h> | |
20 | #include <linux/bitops.h> | |
21 | #include <net/sock.h> /* for sock_no_* */ | |
22 | #include <linux/uaccess.h> | |
23 | #include <linux/export.h> | |
24 | ||
25 | #include "resources.h" | |
26 | #include "common.h" /* common for PVCs and SVCs */ | |
27 | #include "signaling.h" | |
28 | #include "addr.h" | |
29 | ||
30 | static int svc_create(struct net *net, struct socket *sock, int protocol, | |
31 | int kern); | |
32 | ||
33 | /* | |
34 | * Note: since all this is still nicely synchronized with the signaling demon, | |
35 | * there's no need to protect sleep loops with clis. If signaling is | |
36 | * moved into the kernel, that would change. | |
37 | */ | |
38 | ||
39 | ||
40 | static int svc_shutdown(struct socket *sock, int how) | |
41 | { | |
42 | return 0; | |
43 | } | |
44 | ||
45 | static void svc_disconnect(struct atm_vcc *vcc) | |
46 | { | |
47 | DEFINE_WAIT(wait); | |
48 | struct sk_buff *skb; | |
49 | struct sock *sk = sk_atm(vcc); | |
50 | ||
51 | pr_debug("%p\n", vcc); | |
52 | if (test_bit(ATM_VF_REGIS, &vcc->flags)) { | |
53 | sigd_enq(vcc, as_close, NULL, NULL, NULL); | |
54 | for (;;) { | |
55 | prepare_to_wait(sk_sleep(sk), &wait, TASK_UNINTERRUPTIBLE); | |
56 | if (test_bit(ATM_VF_RELEASED, &vcc->flags) || !sigd) | |
57 | break; | |
58 | schedule(); | |
59 | } | |
60 | finish_wait(sk_sleep(sk), &wait); | |
61 | } | |
62 | /* beware - socket is still in use by atmsigd until the last | |
63 | as_indicate has been answered */ | |
64 | while ((skb = skb_dequeue(&sk->sk_receive_queue)) != NULL) { | |
65 | atm_return(vcc, skb->truesize); | |
66 | pr_debug("LISTEN REL\n"); | |
67 | sigd_enq2(NULL, as_reject, vcc, NULL, NULL, &vcc->qos, 0); | |
68 | dev_kfree_skb(skb); | |
69 | } | |
70 | clear_bit(ATM_VF_REGIS, &vcc->flags); | |
71 | /* ... may retry later */ | |
72 | } | |
73 | ||
74 | static int svc_release(struct socket *sock) | |
75 | { | |
76 | struct sock *sk = sock->sk; | |
77 | struct atm_vcc *vcc; | |
78 | ||
79 | if (sk) { | |
80 | vcc = ATM_SD(sock); | |
81 | pr_debug("%p\n", vcc); | |
82 | clear_bit(ATM_VF_READY, &vcc->flags); | |
83 | /* | |
84 | * VCC pointer is used as a reference, | |
85 | * so we must not free it (thereby subjecting it to re-use) | |
86 | * before all pending connections are closed | |
87 | */ | |
88 | svc_disconnect(vcc); | |
89 | vcc_release(sock); | |
90 | } | |
91 | return 0; | |
92 | } | |
93 | ||
94 | static int svc_bind(struct socket *sock, struct sockaddr *sockaddr, | |
95 | int sockaddr_len) | |
96 | { | |
97 | DEFINE_WAIT(wait); | |
98 | struct sock *sk = sock->sk; | |
99 | struct sockaddr_atmsvc *addr; | |
100 | struct atm_vcc *vcc; | |
101 | int error; | |
102 | ||
103 | if (sockaddr_len != sizeof(struct sockaddr_atmsvc)) | |
104 | return -EINVAL; | |
105 | lock_sock(sk); | |
106 | if (sock->state == SS_CONNECTED) { | |
107 | error = -EISCONN; | |
108 | goto out; | |
109 | } | |
110 | if (sock->state != SS_UNCONNECTED) { | |
111 | error = -EINVAL; | |
112 | goto out; | |
113 | } | |
114 | vcc = ATM_SD(sock); | |
115 | addr = (struct sockaddr_atmsvc *) sockaddr; | |
116 | if (addr->sas_family != AF_ATMSVC) { | |
117 | error = -EAFNOSUPPORT; | |
118 | goto out; | |
119 | } | |
120 | clear_bit(ATM_VF_BOUND, &vcc->flags); | |
121 | /* failing rebind will kill old binding */ | |
122 | /* @@@ check memory (de)allocation on rebind */ | |
123 | if (!test_bit(ATM_VF_HASQOS, &vcc->flags)) { | |
124 | error = -EBADFD; | |
125 | goto out; | |
126 | } | |
127 | vcc->local = *addr; | |
128 | set_bit(ATM_VF_WAITING, &vcc->flags); | |
129 | sigd_enq(vcc, as_bind, NULL, NULL, &vcc->local); | |
130 | for (;;) { | |
131 | prepare_to_wait(sk_sleep(sk), &wait, TASK_UNINTERRUPTIBLE); | |
132 | if (!test_bit(ATM_VF_WAITING, &vcc->flags) || !sigd) | |
133 | break; | |
134 | schedule(); | |
135 | } | |
136 | finish_wait(sk_sleep(sk), &wait); | |
137 | clear_bit(ATM_VF_REGIS, &vcc->flags); /* doesn't count */ | |
138 | if (!sigd) { | |
139 | error = -EUNATCH; | |
140 | goto out; | |
141 | } | |
142 | if (!sk->sk_err) | |
143 | set_bit(ATM_VF_BOUND, &vcc->flags); | |
144 | error = -sk->sk_err; | |
145 | out: | |
146 | release_sock(sk); | |
147 | return error; | |
148 | } | |
149 | ||
150 | static int svc_connect(struct socket *sock, struct sockaddr *sockaddr, | |
151 | int sockaddr_len, int flags) | |
152 | { | |
153 | DEFINE_WAIT(wait); | |
154 | struct sock *sk = sock->sk; | |
155 | struct sockaddr_atmsvc *addr; | |
156 | struct atm_vcc *vcc = ATM_SD(sock); | |
157 | int error; | |
158 | ||
159 | pr_debug("%p\n", vcc); | |
160 | lock_sock(sk); | |
161 | if (sockaddr_len != sizeof(struct sockaddr_atmsvc)) { | |
162 | error = -EINVAL; | |
163 | goto out; | |
164 | } | |
165 | ||
166 | switch (sock->state) { | |
167 | default: | |
168 | error = -EINVAL; | |
169 | goto out; | |
170 | case SS_CONNECTED: | |
171 | error = -EISCONN; | |
172 | goto out; | |
173 | case SS_CONNECTING: | |
174 | if (test_bit(ATM_VF_WAITING, &vcc->flags)) { | |
175 | error = -EALREADY; | |
176 | goto out; | |
177 | } | |
178 | sock->state = SS_UNCONNECTED; | |
179 | if (sk->sk_err) { | |
180 | error = -sk->sk_err; | |
181 | goto out; | |
182 | } | |
183 | break; | |
184 | case SS_UNCONNECTED: | |
185 | addr = (struct sockaddr_atmsvc *) sockaddr; | |
186 | if (addr->sas_family != AF_ATMSVC) { | |
187 | error = -EAFNOSUPPORT; | |
188 | goto out; | |
189 | } | |
190 | if (!test_bit(ATM_VF_HASQOS, &vcc->flags)) { | |
191 | error = -EBADFD; | |
192 | goto out; | |
193 | } | |
194 | if (vcc->qos.txtp.traffic_class == ATM_ANYCLASS || | |
195 | vcc->qos.rxtp.traffic_class == ATM_ANYCLASS) { | |
196 | error = -EINVAL; | |
197 | goto out; | |
198 | } | |
199 | if (!vcc->qos.txtp.traffic_class && | |
200 | !vcc->qos.rxtp.traffic_class) { | |
201 | error = -EINVAL; | |
202 | goto out; | |
203 | } | |
204 | vcc->remote = *addr; | |
205 | set_bit(ATM_VF_WAITING, &vcc->flags); | |
206 | sigd_enq(vcc, as_connect, NULL, NULL, &vcc->remote); | |
207 | if (flags & O_NONBLOCK) { | |
208 | sock->state = SS_CONNECTING; | |
209 | error = -EINPROGRESS; | |
210 | goto out; | |
211 | } | |
212 | error = 0; | |
213 | prepare_to_wait(sk_sleep(sk), &wait, TASK_INTERRUPTIBLE); | |
214 | while (test_bit(ATM_VF_WAITING, &vcc->flags) && sigd) { | |
215 | schedule(); | |
216 | if (!signal_pending(current)) { | |
217 | prepare_to_wait(sk_sleep(sk), &wait, | |
218 | TASK_INTERRUPTIBLE); | |
219 | continue; | |
220 | } | |
221 | pr_debug("*ABORT*\n"); | |
222 | /* | |
223 | * This is tricky: | |
224 | * Kernel ---close--> Demon | |
225 | * Kernel <--close--- Demon | |
226 | * or | |
227 | * Kernel ---close--> Demon | |
228 | * Kernel <--error--- Demon | |
229 | * or | |
230 | * Kernel ---close--> Demon | |
231 | * Kernel <--okay---- Demon | |
232 | * Kernel <--close--- Demon | |
233 | */ | |
234 | sigd_enq(vcc, as_close, NULL, NULL, NULL); | |
235 | while (test_bit(ATM_VF_WAITING, &vcc->flags) && sigd) { | |
236 | prepare_to_wait(sk_sleep(sk), &wait, | |
237 | TASK_INTERRUPTIBLE); | |
238 | schedule(); | |
239 | } | |
240 | if (!sk->sk_err) | |
241 | while (!test_bit(ATM_VF_RELEASED, &vcc->flags) && | |
242 | sigd) { | |
243 | prepare_to_wait(sk_sleep(sk), &wait, | |
244 | TASK_INTERRUPTIBLE); | |
245 | schedule(); | |
246 | } | |
247 | clear_bit(ATM_VF_REGIS, &vcc->flags); | |
248 | clear_bit(ATM_VF_RELEASED, &vcc->flags); | |
249 | clear_bit(ATM_VF_CLOSE, &vcc->flags); | |
250 | /* we're gone now but may connect later */ | |
251 | error = -EINTR; | |
252 | break; | |
253 | } | |
254 | finish_wait(sk_sleep(sk), &wait); | |
255 | if (error) | |
256 | goto out; | |
257 | if (!sigd) { | |
258 | error = -EUNATCH; | |
259 | goto out; | |
260 | } | |
261 | if (sk->sk_err) { | |
262 | error = -sk->sk_err; | |
263 | goto out; | |
264 | } | |
265 | } | |
266 | ||
267 | vcc->qos.txtp.max_pcr = SELECT_TOP_PCR(vcc->qos.txtp); | |
268 | vcc->qos.txtp.pcr = 0; | |
269 | vcc->qos.txtp.min_pcr = 0; | |
270 | ||
271 | error = vcc_connect(sock, vcc->itf, vcc->vpi, vcc->vci); | |
272 | if (!error) | |
273 | sock->state = SS_CONNECTED; | |
274 | else | |
275 | (void)svc_disconnect(vcc); | |
276 | out: | |
277 | release_sock(sk); | |
278 | return error; | |
279 | } | |
280 | ||
281 | static int svc_listen(struct socket *sock, int backlog) | |
282 | { | |
283 | DEFINE_WAIT(wait); | |
284 | struct sock *sk = sock->sk; | |
285 | struct atm_vcc *vcc = ATM_SD(sock); | |
286 | int error; | |
287 | ||
288 | pr_debug("%p\n", vcc); | |
289 | lock_sock(sk); | |
290 | /* let server handle listen on unbound sockets */ | |
291 | if (test_bit(ATM_VF_SESSION, &vcc->flags)) { | |
292 | error = -EINVAL; | |
293 | goto out; | |
294 | } | |
295 | if (test_bit(ATM_VF_LISTEN, &vcc->flags)) { | |
296 | error = -EADDRINUSE; | |
297 | goto out; | |
298 | } | |
299 | set_bit(ATM_VF_WAITING, &vcc->flags); | |
300 | sigd_enq(vcc, as_listen, NULL, NULL, &vcc->local); | |
301 | for (;;) { | |
302 | prepare_to_wait(sk_sleep(sk), &wait, TASK_UNINTERRUPTIBLE); | |
303 | if (!test_bit(ATM_VF_WAITING, &vcc->flags) || !sigd) | |
304 | break; | |
305 | schedule(); | |
306 | } | |
307 | finish_wait(sk_sleep(sk), &wait); | |
308 | if (!sigd) { | |
309 | error = -EUNATCH; | |
310 | goto out; | |
311 | } | |
312 | set_bit(ATM_VF_LISTEN, &vcc->flags); | |
313 | vcc_insert_socket(sk); | |
314 | sk->sk_max_ack_backlog = backlog > 0 ? backlog : ATM_BACKLOG_DEFAULT; | |
315 | error = -sk->sk_err; | |
316 | out: | |
317 | release_sock(sk); | |
318 | return error; | |
319 | } | |
320 | ||
321 | static int svc_accept(struct socket *sock, struct socket *newsock, int flags, | |
322 | bool kern) | |
323 | { | |
324 | struct sock *sk = sock->sk; | |
325 | struct sk_buff *skb; | |
326 | struct atmsvc_msg *msg; | |
327 | struct atm_vcc *old_vcc = ATM_SD(sock); | |
328 | struct atm_vcc *new_vcc; | |
329 | int error; | |
330 | ||
331 | lock_sock(sk); | |
332 | ||
333 | error = svc_create(sock_net(sk), newsock, 0, kern); | |
334 | if (error) | |
335 | goto out; | |
336 | ||
337 | new_vcc = ATM_SD(newsock); | |
338 | ||
339 | pr_debug("%p -> %p\n", old_vcc, new_vcc); | |
340 | while (1) { | |
341 | DEFINE_WAIT(wait); | |
342 | ||
343 | prepare_to_wait(sk_sleep(sk), &wait, TASK_INTERRUPTIBLE); | |
344 | while (!(skb = skb_dequeue(&sk->sk_receive_queue)) && | |
345 | sigd) { | |
346 | if (test_bit(ATM_VF_RELEASED, &old_vcc->flags)) | |
347 | break; | |
348 | if (test_bit(ATM_VF_CLOSE, &old_vcc->flags)) { | |
349 | error = -sk->sk_err; | |
350 | break; | |
351 | } | |
352 | if (flags & O_NONBLOCK) { | |
353 | error = -EAGAIN; | |
354 | break; | |
355 | } | |
356 | release_sock(sk); | |
357 | schedule(); | |
358 | lock_sock(sk); | |
359 | if (signal_pending(current)) { | |
360 | error = -ERESTARTSYS; | |
361 | break; | |
362 | } | |
363 | prepare_to_wait(sk_sleep(sk), &wait, | |
364 | TASK_INTERRUPTIBLE); | |
365 | } | |
366 | finish_wait(sk_sleep(sk), &wait); | |
367 | if (error) | |
368 | goto out; | |
369 | if (!skb) { | |
370 | error = -EUNATCH; | |
371 | goto out; | |
372 | } | |
373 | msg = (struct atmsvc_msg *)skb->data; | |
374 | new_vcc->qos = msg->qos; | |
375 | set_bit(ATM_VF_HASQOS, &new_vcc->flags); | |
376 | new_vcc->remote = msg->svc; | |
377 | new_vcc->local = msg->local; | |
378 | new_vcc->sap = msg->sap; | |
379 | error = vcc_connect(newsock, msg->pvc.sap_addr.itf, | |
380 | msg->pvc.sap_addr.vpi, | |
381 | msg->pvc.sap_addr.vci); | |
382 | dev_kfree_skb(skb); | |
383 | sk->sk_ack_backlog--; | |
384 | if (error) { | |
385 | sigd_enq2(NULL, as_reject, old_vcc, NULL, NULL, | |
386 | &old_vcc->qos, error); | |
387 | error = error == -EAGAIN ? -EBUSY : error; | |
388 | goto out; | |
389 | } | |
390 | /* wait should be short, so we ignore the non-blocking flag */ | |
391 | set_bit(ATM_VF_WAITING, &new_vcc->flags); | |
392 | sigd_enq(new_vcc, as_accept, old_vcc, NULL, NULL); | |
393 | for (;;) { | |
394 | prepare_to_wait(sk_sleep(sk_atm(new_vcc)), &wait, | |
395 | TASK_UNINTERRUPTIBLE); | |
396 | if (!test_bit(ATM_VF_WAITING, &new_vcc->flags) || !sigd) | |
397 | break; | |
398 | release_sock(sk); | |
399 | schedule(); | |
400 | lock_sock(sk); | |
401 | } | |
402 | finish_wait(sk_sleep(sk_atm(new_vcc)), &wait); | |
403 | if (!sigd) { | |
404 | error = -EUNATCH; | |
405 | goto out; | |
406 | } | |
407 | if (!sk_atm(new_vcc)->sk_err) | |
408 | break; | |
409 | if (sk_atm(new_vcc)->sk_err != ERESTARTSYS) { | |
410 | error = -sk_atm(new_vcc)->sk_err; | |
411 | goto out; | |
412 | } | |
413 | } | |
414 | newsock->state = SS_CONNECTED; | |
415 | out: | |
416 | release_sock(sk); | |
417 | return error; | |
418 | } | |
419 | ||
420 | static int svc_getname(struct socket *sock, struct sockaddr *sockaddr, | |
421 | int *sockaddr_len, int peer) | |
422 | { | |
423 | struct sockaddr_atmsvc *addr; | |
424 | ||
425 | *sockaddr_len = sizeof(struct sockaddr_atmsvc); | |
426 | addr = (struct sockaddr_atmsvc *) sockaddr; | |
427 | memcpy(addr, peer ? &ATM_SD(sock)->remote : &ATM_SD(sock)->local, | |
428 | sizeof(struct sockaddr_atmsvc)); | |
429 | return 0; | |
430 | } | |
431 | ||
432 | int svc_change_qos(struct atm_vcc *vcc, struct atm_qos *qos) | |
433 | { | |
434 | struct sock *sk = sk_atm(vcc); | |
435 | DEFINE_WAIT(wait); | |
436 | ||
437 | set_bit(ATM_VF_WAITING, &vcc->flags); | |
438 | sigd_enq2(vcc, as_modify, NULL, NULL, &vcc->local, qos, 0); | |
439 | for (;;) { | |
440 | prepare_to_wait(sk_sleep(sk), &wait, TASK_UNINTERRUPTIBLE); | |
441 | if (!test_bit(ATM_VF_WAITING, &vcc->flags) || | |
442 | test_bit(ATM_VF_RELEASED, &vcc->flags) || !sigd) { | |
443 | break; | |
444 | } | |
445 | schedule(); | |
446 | } | |
447 | finish_wait(sk_sleep(sk), &wait); | |
448 | if (!sigd) | |
449 | return -EUNATCH; | |
450 | return -sk->sk_err; | |
451 | } | |
452 | ||
453 | static int svc_setsockopt(struct socket *sock, int level, int optname, | |
454 | char __user *optval, unsigned int optlen) | |
455 | { | |
456 | struct sock *sk = sock->sk; | |
457 | struct atm_vcc *vcc = ATM_SD(sock); | |
458 | int value, error = 0; | |
459 | ||
460 | lock_sock(sk); | |
461 | switch (optname) { | |
462 | case SO_ATMSAP: | |
463 | if (level != SOL_ATM || optlen != sizeof(struct atm_sap)) { | |
464 | error = -EINVAL; | |
465 | goto out; | |
466 | } | |
467 | if (copy_from_user(&vcc->sap, optval, optlen)) { | |
468 | error = -EFAULT; | |
469 | goto out; | |
470 | } | |
471 | set_bit(ATM_VF_HASSAP, &vcc->flags); | |
472 | break; | |
473 | case SO_MULTIPOINT: | |
474 | if (level != SOL_ATM || optlen != sizeof(int)) { | |
475 | error = -EINVAL; | |
476 | goto out; | |
477 | } | |
478 | if (get_user(value, (int __user *)optval)) { | |
479 | error = -EFAULT; | |
480 | goto out; | |
481 | } | |
482 | if (value == 1) | |
483 | set_bit(ATM_VF_SESSION, &vcc->flags); | |
484 | else if (value == 0) | |
485 | clear_bit(ATM_VF_SESSION, &vcc->flags); | |
486 | else | |
487 | error = -EINVAL; | |
488 | break; | |
489 | default: | |
490 | error = vcc_setsockopt(sock, level, optname, optval, optlen); | |
491 | } | |
492 | ||
493 | out: | |
494 | release_sock(sk); | |
495 | return error; | |
496 | } | |
497 | ||
498 | static int svc_getsockopt(struct socket *sock, int level, int optname, | |
499 | char __user *optval, int __user *optlen) | |
500 | { | |
501 | struct sock *sk = sock->sk; | |
502 | int error = 0, len; | |
503 | ||
504 | lock_sock(sk); | |
505 | if (!__SO_LEVEL_MATCH(optname, level) || optname != SO_ATMSAP) { | |
506 | error = vcc_getsockopt(sock, level, optname, optval, optlen); | |
507 | goto out; | |
508 | } | |
509 | if (get_user(len, optlen)) { | |
510 | error = -EFAULT; | |
511 | goto out; | |
512 | } | |
513 | if (len != sizeof(struct atm_sap)) { | |
514 | error = -EINVAL; | |
515 | goto out; | |
516 | } | |
517 | if (copy_to_user(optval, &ATM_SD(sock)->sap, sizeof(struct atm_sap))) { | |
518 | error = -EFAULT; | |
519 | goto out; | |
520 | } | |
521 | out: | |
522 | release_sock(sk); | |
523 | return error; | |
524 | } | |
525 | ||
526 | static int svc_addparty(struct socket *sock, struct sockaddr *sockaddr, | |
527 | int sockaddr_len, int flags) | |
528 | { | |
529 | DEFINE_WAIT(wait); | |
530 | struct sock *sk = sock->sk; | |
531 | struct atm_vcc *vcc = ATM_SD(sock); | |
532 | int error; | |
533 | ||
534 | lock_sock(sk); | |
535 | set_bit(ATM_VF_WAITING, &vcc->flags); | |
536 | sigd_enq(vcc, as_addparty, NULL, NULL, | |
537 | (struct sockaddr_atmsvc *) sockaddr); | |
538 | if (flags & O_NONBLOCK) { | |
539 | error = -EINPROGRESS; | |
540 | goto out; | |
541 | } | |
542 | pr_debug("added wait queue\n"); | |
543 | for (;;) { | |
544 | prepare_to_wait(sk_sleep(sk), &wait, TASK_INTERRUPTIBLE); | |
545 | if (!test_bit(ATM_VF_WAITING, &vcc->flags) || !sigd) | |
546 | break; | |
547 | schedule(); | |
548 | } | |
549 | finish_wait(sk_sleep(sk), &wait); | |
550 | error = -xchg(&sk->sk_err_soft, 0); | |
551 | out: | |
552 | release_sock(sk); | |
553 | return error; | |
554 | } | |
555 | ||
556 | static int svc_dropparty(struct socket *sock, int ep_ref) | |
557 | { | |
558 | DEFINE_WAIT(wait); | |
559 | struct sock *sk = sock->sk; | |
560 | struct atm_vcc *vcc = ATM_SD(sock); | |
561 | int error; | |
562 | ||
563 | lock_sock(sk); | |
564 | set_bit(ATM_VF_WAITING, &vcc->flags); | |
565 | sigd_enq2(vcc, as_dropparty, NULL, NULL, NULL, NULL, ep_ref); | |
566 | for (;;) { | |
567 | prepare_to_wait(sk_sleep(sk), &wait, TASK_INTERRUPTIBLE); | |
568 | if (!test_bit(ATM_VF_WAITING, &vcc->flags) || !sigd) | |
569 | break; | |
570 | schedule(); | |
571 | } | |
572 | finish_wait(sk_sleep(sk), &wait); | |
573 | if (!sigd) { | |
574 | error = -EUNATCH; | |
575 | goto out; | |
576 | } | |
577 | error = -xchg(&sk->sk_err_soft, 0); | |
578 | out: | |
579 | release_sock(sk); | |
580 | return error; | |
581 | } | |
582 | ||
583 | static int svc_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg) | |
584 | { | |
585 | int error, ep_ref; | |
586 | struct sockaddr_atmsvc sa; | |
587 | struct atm_vcc *vcc = ATM_SD(sock); | |
588 | ||
589 | switch (cmd) { | |
590 | case ATM_ADDPARTY: | |
591 | if (!test_bit(ATM_VF_SESSION, &vcc->flags)) | |
592 | return -EINVAL; | |
593 | if (copy_from_user(&sa, (void __user *) arg, sizeof(sa))) | |
594 | return -EFAULT; | |
595 | error = svc_addparty(sock, (struct sockaddr *)&sa, sizeof(sa), | |
596 | 0); | |
597 | break; | |
598 | case ATM_DROPPARTY: | |
599 | if (!test_bit(ATM_VF_SESSION, &vcc->flags)) | |
600 | return -EINVAL; | |
601 | if (copy_from_user(&ep_ref, (void __user *) arg, sizeof(int))) | |
602 | return -EFAULT; | |
603 | error = svc_dropparty(sock, ep_ref); | |
604 | break; | |
605 | default: | |
606 | error = vcc_ioctl(sock, cmd, arg); | |
607 | } | |
608 | ||
609 | return error; | |
610 | } | |
611 | ||
612 | #ifdef CONFIG_COMPAT | |
613 | static int svc_compat_ioctl(struct socket *sock, unsigned int cmd, | |
614 | unsigned long arg) | |
615 | { | |
616 | /* The definition of ATM_ADDPARTY uses the size of struct atm_iobuf. | |
617 | But actually it takes a struct sockaddr_atmsvc, which doesn't need | |
618 | compat handling. So all we have to do is fix up cmd... */ | |
619 | if (cmd == COMPAT_ATM_ADDPARTY) | |
620 | cmd = ATM_ADDPARTY; | |
621 | ||
622 | if (cmd == ATM_ADDPARTY || cmd == ATM_DROPPARTY) | |
623 | return svc_ioctl(sock, cmd, arg); | |
624 | else | |
625 | return vcc_compat_ioctl(sock, cmd, arg); | |
626 | } | |
627 | #endif /* CONFIG_COMPAT */ | |
628 | ||
629 | static const struct proto_ops svc_proto_ops = { | |
630 | .family = PF_ATMSVC, | |
631 | .owner = THIS_MODULE, | |
632 | ||
633 | .release = svc_release, | |
634 | .bind = svc_bind, | |
635 | .connect = svc_connect, | |
636 | .socketpair = sock_no_socketpair, | |
637 | .accept = svc_accept, | |
638 | .getname = svc_getname, | |
639 | .poll = vcc_poll, | |
640 | .ioctl = svc_ioctl, | |
641 | #ifdef CONFIG_COMPAT | |
642 | .compat_ioctl = svc_compat_ioctl, | |
643 | #endif | |
644 | .listen = svc_listen, | |
645 | .shutdown = svc_shutdown, | |
646 | .setsockopt = svc_setsockopt, | |
647 | .getsockopt = svc_getsockopt, | |
648 | .sendmsg = vcc_sendmsg, | |
649 | .recvmsg = vcc_recvmsg, | |
650 | .mmap = sock_no_mmap, | |
651 | .sendpage = sock_no_sendpage, | |
652 | }; | |
653 | ||
654 | ||
655 | static int svc_create(struct net *net, struct socket *sock, int protocol, | |
656 | int kern) | |
657 | { | |
658 | int error; | |
659 | ||
660 | if (!net_eq(net, &init_net)) | |
661 | return -EAFNOSUPPORT; | |
662 | ||
663 | sock->ops = &svc_proto_ops; | |
664 | error = vcc_create(net, sock, protocol, AF_ATMSVC, kern); | |
665 | if (error) | |
666 | return error; | |
667 | ATM_SD(sock)->local.sas_family = AF_ATMSVC; | |
668 | ATM_SD(sock)->remote.sas_family = AF_ATMSVC; | |
669 | return 0; | |
670 | } | |
671 | ||
672 | static const struct net_proto_family svc_family_ops = { | |
673 | .family = PF_ATMSVC, | |
674 | .create = svc_create, | |
675 | .owner = THIS_MODULE, | |
676 | }; | |
677 | ||
678 | ||
679 | /* | |
680 | * Initialize the ATM SVC protocol family | |
681 | */ | |
682 | ||
683 | int __init atmsvc_init(void) | |
684 | { | |
685 | return sock_register(&svc_family_ops); | |
686 | } | |
687 | ||
688 | void atmsvc_exit(void) | |
689 | { | |
690 | sock_unregister(PF_ATMSVC); | |
691 | } |