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Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /* net/atm/svc.c - ATM SVC sockets */ |
2 | ||
3 | /* Written 1995-2000 by Werner Almesberger, EPFL LRC/ICA */ | |
4 | ||
99824461 | 5 | #define pr_fmt(fmt) KBUILD_MODNAME ":%s: " fmt, __func__ |
1da177e4 LT |
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.h> /* jiffies and HZ */ | |
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_* */ | |
b7d9371b | 22 | #include <linux/uaccess.h> |
bc3b2d7f | 23 | #include <linux/export.h> |
1da177e4 LT |
24 | |
25 | #include "resources.h" | |
26 | #include "common.h" /* common for PVCs and SVCs */ | |
27 | #include "signaling.h" | |
28 | #include "addr.h" | |
29 | ||
b7d9371b JP |
30 | static int svc_create(struct net *net, struct socket *sock, int protocol, |
31 | int kern); | |
1da177e4 | 32 | |
1da177e4 LT |
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 | ||
b7d9371b | 40 | static int svc_shutdown(struct socket *sock, int how) |
1da177e4 LT |
41 | { |
42 | return 0; | |
43 | } | |
44 | ||
1da177e4 LT |
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 | ||
b7d9371b JP |
51 | pr_debug("%p\n", vcc); |
52 | if (test_bit(ATM_VF_REGIS, &vcc->flags)) { | |
aa395145 | 53 | prepare_to_wait(sk_sleep(sk), &wait, TASK_UNINTERRUPTIBLE); |
b7d9371b JP |
54 | sigd_enq(vcc, as_close, NULL, NULL, NULL); |
55 | while (!test_bit(ATM_VF_RELEASED, &vcc->flags) && sigd) { | |
1da177e4 | 56 | schedule(); |
aa395145 | 57 | prepare_to_wait(sk_sleep(sk), &wait, |
b7d9371b | 58 | TASK_UNINTERRUPTIBLE); |
1da177e4 | 59 | } |
aa395145 | 60 | finish_wait(sk_sleep(sk), &wait); |
1da177e4 LT |
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); | |
52240062 | 66 | pr_debug("LISTEN REL\n"); |
b7d9371b | 67 | sigd_enq2(NULL, as_reject, vcc, NULL, NULL, &vcc->qos, 0); |
1da177e4 LT |
68 | dev_kfree_skb(skb); |
69 | } | |
70 | clear_bit(ATM_VF_REGIS, &vcc->flags); | |
71 | /* ... may retry later */ | |
72 | } | |
73 | ||
1da177e4 LT |
74 | static int svc_release(struct socket *sock) |
75 | { | |
76 | struct sock *sk = sock->sk; | |
77 | struct atm_vcc *vcc; | |
78 | ||
b7d9371b | 79 | if (sk) { |
1da177e4 | 80 | vcc = ATM_SD(sock); |
99824461 | 81 | pr_debug("%p\n", vcc); |
1da177e4 | 82 | clear_bit(ATM_VF_READY, &vcc->flags); |
b7d9371b JP |
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 | */ | |
1da177e4 LT |
88 | svc_disconnect(vcc); |
89 | vcc_release(sock); | |
90 | } | |
91 | return 0; | |
92 | } | |
93 | ||
b7d9371b JP |
94 | static int svc_bind(struct socket *sock, struct sockaddr *sockaddr, |
95 | int sockaddr_len) | |
1da177e4 LT |
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); | |
1da177e4 LT |
115 | addr = (struct sockaddr_atmsvc *) sockaddr; |
116 | if (addr->sas_family != AF_ATMSVC) { | |
117 | error = -EAFNOSUPPORT; | |
118 | goto out; | |
119 | } | |
b7d9371b | 120 | clear_bit(ATM_VF_BOUND, &vcc->flags); |
1da177e4 LT |
121 | /* failing rebind will kill old binding */ |
122 | /* @@@ check memory (de)allocation on rebind */ | |
b7d9371b | 123 | if (!test_bit(ATM_VF_HASQOS, &vcc->flags)) { |
1da177e4 LT |
124 | error = -EBADFD; |
125 | goto out; | |
126 | } | |
127 | vcc->local = *addr; | |
128 | set_bit(ATM_VF_WAITING, &vcc->flags); | |
aa395145 | 129 | prepare_to_wait(sk_sleep(sk), &wait, TASK_UNINTERRUPTIBLE); |
b7d9371b | 130 | sigd_enq(vcc, as_bind, NULL, NULL, &vcc->local); |
1da177e4 LT |
131 | while (test_bit(ATM_VF_WAITING, &vcc->flags) && sigd) { |
132 | schedule(); | |
aa395145 | 133 | prepare_to_wait(sk_sleep(sk), &wait, TASK_UNINTERRUPTIBLE); |
1da177e4 | 134 | } |
aa395145 | 135 | finish_wait(sk_sleep(sk), &wait); |
b7d9371b | 136 | clear_bit(ATM_VF_REGIS, &vcc->flags); /* doesn't count */ |
1da177e4 LT |
137 | if (!sigd) { |
138 | error = -EUNATCH; | |
139 | goto out; | |
140 | } | |
f7d57453 | 141 | if (!sk->sk_err) |
b7d9371b | 142 | set_bit(ATM_VF_BOUND, &vcc->flags); |
1da177e4 LT |
143 | error = -sk->sk_err; |
144 | out: | |
145 | release_sock(sk); | |
146 | return error; | |
147 | } | |
148 | ||
b7d9371b JP |
149 | static int svc_connect(struct socket *sock, struct sockaddr *sockaddr, |
150 | int sockaddr_len, int flags) | |
1da177e4 LT |
151 | { |
152 | DEFINE_WAIT(wait); | |
153 | struct sock *sk = sock->sk; | |
154 | struct sockaddr_atmsvc *addr; | |
155 | struct atm_vcc *vcc = ATM_SD(sock); | |
156 | int error; | |
157 | ||
b7d9371b | 158 | pr_debug("%p\n", vcc); |
1da177e4 LT |
159 | lock_sock(sk); |
160 | if (sockaddr_len != sizeof(struct sockaddr_atmsvc)) { | |
161 | error = -EINVAL; | |
162 | goto out; | |
163 | } | |
164 | ||
165 | switch (sock->state) { | |
166 | default: | |
167 | error = -EINVAL; | |
168 | goto out; | |
169 | case SS_CONNECTED: | |
170 | error = -EISCONN; | |
171 | goto out; | |
172 | case SS_CONNECTING: | |
173 | if (test_bit(ATM_VF_WAITING, &vcc->flags)) { | |
174 | error = -EALREADY; | |
175 | goto out; | |
176 | } | |
177 | sock->state = SS_UNCONNECTED; | |
178 | if (sk->sk_err) { | |
179 | error = -sk->sk_err; | |
180 | goto out; | |
181 | } | |
182 | break; | |
183 | case SS_UNCONNECTED: | |
184 | addr = (struct sockaddr_atmsvc *) sockaddr; | |
185 | if (addr->sas_family != AF_ATMSVC) { | |
186 | error = -EAFNOSUPPORT; | |
187 | goto out; | |
188 | } | |
189 | if (!test_bit(ATM_VF_HASQOS, &vcc->flags)) { | |
190 | error = -EBADFD; | |
191 | goto out; | |
192 | } | |
193 | if (vcc->qos.txtp.traffic_class == ATM_ANYCLASS || | |
194 | vcc->qos.rxtp.traffic_class == ATM_ANYCLASS) { | |
195 | error = -EINVAL; | |
196 | goto out; | |
197 | } | |
198 | if (!vcc->qos.txtp.traffic_class && | |
199 | !vcc->qos.rxtp.traffic_class) { | |
200 | error = -EINVAL; | |
201 | goto out; | |
202 | } | |
203 | vcc->remote = *addr; | |
204 | set_bit(ATM_VF_WAITING, &vcc->flags); | |
aa395145 | 205 | prepare_to_wait(sk_sleep(sk), &wait, TASK_INTERRUPTIBLE); |
b7d9371b | 206 | sigd_enq(vcc, as_connect, NULL, NULL, &vcc->remote); |
1da177e4 | 207 | if (flags & O_NONBLOCK) { |
aa395145 | 208 | finish_wait(sk_sleep(sk), &wait); |
1da177e4 LT |
209 | sock->state = SS_CONNECTING; |
210 | error = -EINPROGRESS; | |
211 | goto out; | |
212 | } | |
213 | error = 0; | |
214 | while (test_bit(ATM_VF_WAITING, &vcc->flags) && sigd) { | |
215 | schedule(); | |
216 | if (!signal_pending(current)) { | |
aa395145 | 217 | prepare_to_wait(sk_sleep(sk), &wait, |
b7d9371b | 218 | TASK_INTERRUPTIBLE); |
1da177e4 LT |
219 | continue; |
220 | } | |
52240062 | 221 | pr_debug("*ABORT*\n"); |
1da177e4 LT |
222 | /* |
223 | * This is tricky: | |
224 | * Kernel ---close--> Demon | |
225 | * Kernel <--close--- Demon | |
f7d57453 | 226 | * or |
1da177e4 LT |
227 | * Kernel ---close--> Demon |
228 | * Kernel <--error--- Demon | |
229 | * or | |
230 | * Kernel ---close--> Demon | |
231 | * Kernel <--okay---- Demon | |
232 | * Kernel <--close--- Demon | |
233 | */ | |
b7d9371b | 234 | sigd_enq(vcc, as_close, NULL, NULL, NULL); |
1da177e4 | 235 | while (test_bit(ATM_VF_WAITING, &vcc->flags) && sigd) { |
aa395145 | 236 | prepare_to_wait(sk_sleep(sk), &wait, |
b7d9371b | 237 | TASK_INTERRUPTIBLE); |
1da177e4 LT |
238 | schedule(); |
239 | } | |
240 | if (!sk->sk_err) | |
b7d9371b JP |
241 | while (!test_bit(ATM_VF_RELEASED, &vcc->flags) && |
242 | sigd) { | |
aa395145 | 243 | prepare_to_wait(sk_sleep(sk), &wait, |
b7d9371b | 244 | TASK_INTERRUPTIBLE); |
1da177e4 LT |
245 | schedule(); |
246 | } | |
b7d9371b JP |
247 | clear_bit(ATM_VF_REGIS, &vcc->flags); |
248 | clear_bit(ATM_VF_RELEASED, &vcc->flags); | |
249 | clear_bit(ATM_VF_CLOSE, &vcc->flags); | |
1da177e4 LT |
250 | /* we're gone now but may connect later */ |
251 | error = -EINTR; | |
252 | break; | |
253 | } | |
aa395145 | 254 | finish_wait(sk_sleep(sk), &wait); |
1da177e4 LT |
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 | * Not supported yet | |
268 | * | |
269 | * #ifndef CONFIG_SINGLE_SIGITF | |
270 | */ | |
271 | vcc->qos.txtp.max_pcr = SELECT_TOP_PCR(vcc->qos.txtp); | |
272 | vcc->qos.txtp.pcr = 0; | |
273 | vcc->qos.txtp.min_pcr = 0; | |
274 | /* | |
275 | * #endif | |
276 | */ | |
b7d9371b JP |
277 | error = vcc_connect(sock, vcc->itf, vcc->vpi, vcc->vci); |
278 | if (!error) | |
1da177e4 LT |
279 | sock->state = SS_CONNECTED; |
280 | else | |
b7d9371b | 281 | (void)svc_disconnect(vcc); |
1da177e4 LT |
282 | out: |
283 | release_sock(sk); | |
284 | return error; | |
285 | } | |
286 | ||
b7d9371b | 287 | static int svc_listen(struct socket *sock, int backlog) |
1da177e4 LT |
288 | { |
289 | DEFINE_WAIT(wait); | |
290 | struct sock *sk = sock->sk; | |
291 | struct atm_vcc *vcc = ATM_SD(sock); | |
292 | int error; | |
293 | ||
99824461 | 294 | pr_debug("%p\n", vcc); |
1da177e4 LT |
295 | lock_sock(sk); |
296 | /* let server handle listen on unbound sockets */ | |
b7d9371b | 297 | if (test_bit(ATM_VF_SESSION, &vcc->flags)) { |
1da177e4 LT |
298 | error = -EINVAL; |
299 | goto out; | |
300 | } | |
17b24b3c CW |
301 | if (test_bit(ATM_VF_LISTEN, &vcc->flags)) { |
302 | error = -EADDRINUSE; | |
303 | goto out; | |
b7d9371b | 304 | } |
1da177e4 | 305 | set_bit(ATM_VF_WAITING, &vcc->flags); |
aa395145 | 306 | prepare_to_wait(sk_sleep(sk), &wait, TASK_UNINTERRUPTIBLE); |
b7d9371b | 307 | sigd_enq(vcc, as_listen, NULL, NULL, &vcc->local); |
1da177e4 LT |
308 | while (test_bit(ATM_VF_WAITING, &vcc->flags) && sigd) { |
309 | schedule(); | |
aa395145 | 310 | prepare_to_wait(sk_sleep(sk), &wait, TASK_UNINTERRUPTIBLE); |
1da177e4 | 311 | } |
aa395145 | 312 | finish_wait(sk_sleep(sk), &wait); |
1da177e4 LT |
313 | if (!sigd) { |
314 | error = -EUNATCH; | |
315 | goto out; | |
316 | } | |
b7d9371b | 317 | set_bit(ATM_VF_LISTEN, &vcc->flags); |
17b24b3c | 318 | vcc_insert_socket(sk); |
1da177e4 LT |
319 | sk->sk_max_ack_backlog = backlog > 0 ? backlog : ATM_BACKLOG_DEFAULT; |
320 | error = -sk->sk_err; | |
321 | out: | |
322 | release_sock(sk); | |
323 | return error; | |
324 | } | |
325 | ||
b7d9371b | 326 | static int svc_accept(struct socket *sock, struct socket *newsock, int flags) |
1da177e4 LT |
327 | { |
328 | struct sock *sk = sock->sk; | |
329 | struct sk_buff *skb; | |
330 | struct atmsvc_msg *msg; | |
331 | struct atm_vcc *old_vcc = ATM_SD(sock); | |
332 | struct atm_vcc *new_vcc; | |
333 | int error; | |
334 | ||
335 | lock_sock(sk); | |
336 | ||
3f378b68 | 337 | error = svc_create(sock_net(sk), newsock, 0, 0); |
1da177e4 LT |
338 | if (error) |
339 | goto out; | |
340 | ||
341 | new_vcc = ATM_SD(newsock); | |
342 | ||
99824461 | 343 | pr_debug("%p -> %p\n", old_vcc, new_vcc); |
1da177e4 LT |
344 | while (1) { |
345 | DEFINE_WAIT(wait); | |
346 | ||
aa395145 | 347 | prepare_to_wait(sk_sleep(sk), &wait, TASK_INTERRUPTIBLE); |
1da177e4 LT |
348 | while (!(skb = skb_dequeue(&sk->sk_receive_queue)) && |
349 | sigd) { | |
b7d9371b JP |
350 | if (test_bit(ATM_VF_RELEASED, &old_vcc->flags)) |
351 | break; | |
352 | if (test_bit(ATM_VF_CLOSE, &old_vcc->flags)) { | |
1da177e4 LT |
353 | error = -sk->sk_err; |
354 | break; | |
355 | } | |
356 | if (flags & O_NONBLOCK) { | |
357 | error = -EAGAIN; | |
358 | break; | |
359 | } | |
360 | release_sock(sk); | |
361 | schedule(); | |
362 | lock_sock(sk); | |
363 | if (signal_pending(current)) { | |
364 | error = -ERESTARTSYS; | |
365 | break; | |
366 | } | |
aa395145 | 367 | prepare_to_wait(sk_sleep(sk), &wait, |
b7d9371b | 368 | TASK_INTERRUPTIBLE); |
1da177e4 | 369 | } |
aa395145 | 370 | finish_wait(sk_sleep(sk), &wait); |
1da177e4 LT |
371 | if (error) |
372 | goto out; | |
373 | if (!skb) { | |
374 | error = -EUNATCH; | |
375 | goto out; | |
376 | } | |
b7d9371b | 377 | msg = (struct atmsvc_msg *)skb->data; |
1da177e4 | 378 | new_vcc->qos = msg->qos; |
b7d9371b | 379 | set_bit(ATM_VF_HASQOS, &new_vcc->flags); |
1da177e4 LT |
380 | new_vcc->remote = msg->svc; |
381 | new_vcc->local = msg->local; | |
382 | new_vcc->sap = msg->sap; | |
383 | error = vcc_connect(newsock, msg->pvc.sap_addr.itf, | |
b7d9371b JP |
384 | msg->pvc.sap_addr.vpi, |
385 | msg->pvc.sap_addr.vci); | |
1da177e4 LT |
386 | dev_kfree_skb(skb); |
387 | sk->sk_ack_backlog--; | |
388 | if (error) { | |
b7d9371b JP |
389 | sigd_enq2(NULL, as_reject, old_vcc, NULL, NULL, |
390 | &old_vcc->qos, error); | |
1da177e4 LT |
391 | error = error == -EAGAIN ? -EBUSY : error; |
392 | goto out; | |
393 | } | |
394 | /* wait should be short, so we ignore the non-blocking flag */ | |
395 | set_bit(ATM_VF_WAITING, &new_vcc->flags); | |
aa395145 | 396 | prepare_to_wait(sk_sleep(sk_atm(new_vcc)), &wait, |
b7d9371b JP |
397 | TASK_UNINTERRUPTIBLE); |
398 | sigd_enq(new_vcc, as_accept, old_vcc, NULL, NULL); | |
1da177e4 LT |
399 | while (test_bit(ATM_VF_WAITING, &new_vcc->flags) && sigd) { |
400 | release_sock(sk); | |
401 | schedule(); | |
402 | lock_sock(sk); | |
aa395145 | 403 | prepare_to_wait(sk_sleep(sk_atm(new_vcc)), &wait, |
b7d9371b | 404 | TASK_UNINTERRUPTIBLE); |
1da177e4 | 405 | } |
aa395145 | 406 | finish_wait(sk_sleep(sk_atm(new_vcc)), &wait); |
1da177e4 LT |
407 | if (!sigd) { |
408 | error = -EUNATCH; | |
409 | goto out; | |
410 | } | |
411 | if (!sk_atm(new_vcc)->sk_err) | |
412 | break; | |
413 | if (sk_atm(new_vcc)->sk_err != ERESTARTSYS) { | |
414 | error = -sk_atm(new_vcc)->sk_err; | |
415 | goto out; | |
416 | } | |
417 | } | |
418 | newsock->state = SS_CONNECTED; | |
419 | out: | |
420 | release_sock(sk); | |
421 | return error; | |
422 | } | |
423 | ||
b7d9371b JP |
424 | static int svc_getname(struct socket *sock, struct sockaddr *sockaddr, |
425 | int *sockaddr_len, int peer) | |
1da177e4 LT |
426 | { |
427 | struct sockaddr_atmsvc *addr; | |
428 | ||
429 | *sockaddr_len = sizeof(struct sockaddr_atmsvc); | |
430 | addr = (struct sockaddr_atmsvc *) sockaddr; | |
b7d9371b JP |
431 | memcpy(addr, peer ? &ATM_SD(sock)->remote : &ATM_SD(sock)->local, |
432 | sizeof(struct sockaddr_atmsvc)); | |
1da177e4 LT |
433 | return 0; |
434 | } | |
435 | ||
b7d9371b | 436 | int svc_change_qos(struct atm_vcc *vcc, struct atm_qos *qos) |
1da177e4 LT |
437 | { |
438 | struct sock *sk = sk_atm(vcc); | |
439 | DEFINE_WAIT(wait); | |
440 | ||
441 | set_bit(ATM_VF_WAITING, &vcc->flags); | |
aa395145 | 442 | prepare_to_wait(sk_sleep(sk), &wait, TASK_UNINTERRUPTIBLE); |
b7d9371b | 443 | sigd_enq2(vcc, as_modify, NULL, NULL, &vcc->local, qos, 0); |
1da177e4 LT |
444 | while (test_bit(ATM_VF_WAITING, &vcc->flags) && |
445 | !test_bit(ATM_VF_RELEASED, &vcc->flags) && sigd) { | |
446 | schedule(); | |
aa395145 | 447 | prepare_to_wait(sk_sleep(sk), &wait, TASK_UNINTERRUPTIBLE); |
1da177e4 | 448 | } |
aa395145 | 449 | finish_wait(sk_sleep(sk), &wait); |
b7d9371b JP |
450 | if (!sigd) |
451 | return -EUNATCH; | |
1da177e4 LT |
452 | return -sk->sk_err; |
453 | } | |
454 | ||
1da177e4 | 455 | static int svc_setsockopt(struct socket *sock, int level, int optname, |
b7058842 | 456 | char __user *optval, unsigned int optlen) |
1da177e4 LT |
457 | { |
458 | struct sock *sk = sock->sk; | |
459 | struct atm_vcc *vcc = ATM_SD(sock); | |
460 | int value, error = 0; | |
461 | ||
462 | lock_sock(sk); | |
463 | switch (optname) { | |
b7d9371b JP |
464 | case SO_ATMSAP: |
465 | if (level != SOL_ATM || optlen != sizeof(struct atm_sap)) { | |
466 | error = -EINVAL; | |
467 | goto out; | |
468 | } | |
469 | if (copy_from_user(&vcc->sap, optval, optlen)) { | |
470 | error = -EFAULT; | |
471 | goto out; | |
472 | } | |
473 | set_bit(ATM_VF_HASSAP, &vcc->flags); | |
474 | break; | |
475 | case SO_MULTIPOINT: | |
476 | if (level != SOL_ATM || optlen != sizeof(int)) { | |
477 | error = -EINVAL; | |
478 | goto out; | |
479 | } | |
480 | if (get_user(value, (int __user *)optval)) { | |
481 | error = -EFAULT; | |
482 | goto out; | |
483 | } | |
484 | if (value == 1) | |
485 | set_bit(ATM_VF_SESSION, &vcc->flags); | |
486 | else if (value == 0) | |
487 | clear_bit(ATM_VF_SESSION, &vcc->flags); | |
488 | else | |
489 | error = -EINVAL; | |
490 | break; | |
491 | default: | |
492 | error = vcc_setsockopt(sock, level, optname, optval, optlen); | |
1da177e4 LT |
493 | } |
494 | ||
495 | out: | |
496 | release_sock(sk); | |
497 | return error; | |
498 | } | |
499 | ||
b7d9371b JP |
500 | static int svc_getsockopt(struct socket *sock, int level, int optname, |
501 | char __user *optval, int __user *optlen) | |
1da177e4 LT |
502 | { |
503 | struct sock *sk = sock->sk; | |
504 | int error = 0, len; | |
505 | ||
506 | lock_sock(sk); | |
507 | if (!__SO_LEVEL_MATCH(optname, level) || optname != SO_ATMSAP) { | |
508 | error = vcc_getsockopt(sock, level, optname, optval, optlen); | |
509 | goto out; | |
510 | } | |
511 | if (get_user(len, optlen)) { | |
512 | error = -EFAULT; | |
513 | goto out; | |
514 | } | |
515 | if (len != sizeof(struct atm_sap)) { | |
516 | error = -EINVAL; | |
517 | goto out; | |
518 | } | |
519 | if (copy_to_user(optval, &ATM_SD(sock)->sap, sizeof(struct atm_sap))) { | |
520 | error = -EFAULT; | |
521 | goto out; | |
522 | } | |
523 | out: | |
524 | release_sock(sk); | |
525 | return error; | |
526 | } | |
527 | ||
1da177e4 LT |
528 | static int svc_addparty(struct socket *sock, struct sockaddr *sockaddr, |
529 | int sockaddr_len, int flags) | |
530 | { | |
531 | DEFINE_WAIT(wait); | |
532 | struct sock *sk = sock->sk; | |
533 | struct atm_vcc *vcc = ATM_SD(sock); | |
534 | int error; | |
535 | ||
536 | lock_sock(sk); | |
537 | set_bit(ATM_VF_WAITING, &vcc->flags); | |
aa395145 | 538 | prepare_to_wait(sk_sleep(sk), &wait, TASK_INTERRUPTIBLE); |
1da177e4 | 539 | sigd_enq(vcc, as_addparty, NULL, NULL, |
f7d57453 | 540 | (struct sockaddr_atmsvc *) sockaddr); |
1da177e4 | 541 | if (flags & O_NONBLOCK) { |
aa395145 | 542 | finish_wait(sk_sleep(sk), &wait); |
1da177e4 LT |
543 | error = -EINPROGRESS; |
544 | goto out; | |
545 | } | |
99824461 | 546 | pr_debug("added wait queue\n"); |
1da177e4 LT |
547 | while (test_bit(ATM_VF_WAITING, &vcc->flags) && sigd) { |
548 | schedule(); | |
aa395145 | 549 | prepare_to_wait(sk_sleep(sk), &wait, TASK_INTERRUPTIBLE); |
1da177e4 | 550 | } |
aa395145 | 551 | finish_wait(sk_sleep(sk), &wait); |
1da177e4 LT |
552 | error = xchg(&sk->sk_err_soft, 0); |
553 | out: | |
554 | release_sock(sk); | |
555 | return error; | |
556 | } | |
557 | ||
1da177e4 LT |
558 | static int svc_dropparty(struct socket *sock, int ep_ref) |
559 | { | |
560 | DEFINE_WAIT(wait); | |
561 | struct sock *sk = sock->sk; | |
562 | struct atm_vcc *vcc = ATM_SD(sock); | |
563 | int error; | |
564 | ||
565 | lock_sock(sk); | |
566 | set_bit(ATM_VF_WAITING, &vcc->flags); | |
aa395145 | 567 | prepare_to_wait(sk_sleep(sk), &wait, TASK_INTERRUPTIBLE); |
1da177e4 LT |
568 | sigd_enq2(vcc, as_dropparty, NULL, NULL, NULL, NULL, ep_ref); |
569 | while (test_bit(ATM_VF_WAITING, &vcc->flags) && sigd) { | |
570 | schedule(); | |
aa395145 | 571 | prepare_to_wait(sk_sleep(sk), &wait, TASK_INTERRUPTIBLE); |
1da177e4 | 572 | } |
aa395145 | 573 | finish_wait(sk_sleep(sk), &wait); |
1da177e4 LT |
574 | if (!sigd) { |
575 | error = -EUNATCH; | |
576 | goto out; | |
577 | } | |
578 | error = xchg(&sk->sk_err_soft, 0); | |
579 | out: | |
580 | release_sock(sk); | |
581 | return error; | |
582 | } | |
583 | ||
1da177e4 LT |
584 | static int svc_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg) |
585 | { | |
f7d57453 YH |
586 | int error, ep_ref; |
587 | struct sockaddr_atmsvc sa; | |
1da177e4 | 588 | struct atm_vcc *vcc = ATM_SD(sock); |
f7d57453 | 589 | |
1da177e4 | 590 | switch (cmd) { |
b7d9371b JP |
591 | case ATM_ADDPARTY: |
592 | if (!test_bit(ATM_VF_SESSION, &vcc->flags)) | |
593 | return -EINVAL; | |
594 | if (copy_from_user(&sa, (void __user *) arg, sizeof(sa))) | |
595 | return -EFAULT; | |
596 | error = svc_addparty(sock, (struct sockaddr *)&sa, sizeof(sa), | |
597 | 0); | |
598 | break; | |
599 | case ATM_DROPPARTY: | |
600 | if (!test_bit(ATM_VF_SESSION, &vcc->flags)) | |
601 | return -EINVAL; | |
602 | if (copy_from_user(&ep_ref, (void __user *) arg, sizeof(int))) | |
603 | return -EFAULT; | |
604 | error = svc_dropparty(sock, ep_ref); | |
605 | break; | |
606 | default: | |
607 | error = vcc_ioctl(sock, cmd, arg); | |
1da177e4 LT |
608 | } |
609 | ||
610 | return error; | |
611 | } | |
612 | ||
8865c418 | 613 | #ifdef CONFIG_COMPAT |
b7d9371b JP |
614 | static int svc_compat_ioctl(struct socket *sock, unsigned int cmd, |
615 | unsigned long arg) | |
8865c418 DW |
616 | { |
617 | /* The definition of ATM_ADDPARTY uses the size of struct atm_iobuf. | |
618 | But actually it takes a struct sockaddr_atmsvc, which doesn't need | |
619 | compat handling. So all we have to do is fix up cmd... */ | |
620 | if (cmd == COMPAT_ATM_ADDPARTY) | |
621 | cmd = ATM_ADDPARTY; | |
622 | ||
623 | if (cmd == ATM_ADDPARTY || cmd == ATM_DROPPARTY) | |
624 | return svc_ioctl(sock, cmd, arg); | |
625 | else | |
626 | return vcc_compat_ioctl(sock, cmd, arg); | |
627 | } | |
628 | #endif /* CONFIG_COMPAT */ | |
629 | ||
90ddc4f0 | 630 | static const struct proto_ops svc_proto_ops = { |
1da177e4 LT |
631 | .family = PF_ATMSVC, |
632 | .owner = THIS_MODULE, | |
633 | ||
634 | .release = svc_release, | |
635 | .bind = svc_bind, | |
636 | .connect = svc_connect, | |
637 | .socketpair = sock_no_socketpair, | |
638 | .accept = svc_accept, | |
639 | .getname = svc_getname, | |
640 | .poll = vcc_poll, | |
641 | .ioctl = svc_ioctl, | |
8865c418 DW |
642 | #ifdef CONFIG_COMPAT |
643 | .compat_ioctl = svc_compat_ioctl, | |
644 | #endif | |
1da177e4 LT |
645 | .listen = svc_listen, |
646 | .shutdown = svc_shutdown, | |
647 | .setsockopt = svc_setsockopt, | |
648 | .getsockopt = svc_getsockopt, | |
649 | .sendmsg = vcc_sendmsg, | |
650 | .recvmsg = vcc_recvmsg, | |
651 | .mmap = sock_no_mmap, | |
652 | .sendpage = sock_no_sendpage, | |
653 | }; | |
654 | ||
655 | ||
3f378b68 EP |
656 | static int svc_create(struct net *net, struct socket *sock, int protocol, |
657 | int kern) | |
1da177e4 LT |
658 | { |
659 | int error; | |
660 | ||
09ad9bc7 | 661 | if (!net_eq(net, &init_net)) |
1b8d7ae4 EB |
662 | return -EAFNOSUPPORT; |
663 | ||
1da177e4 | 664 | sock->ops = &svc_proto_ops; |
1b8d7ae4 | 665 | error = vcc_create(net, sock, protocol, AF_ATMSVC); |
b7d9371b JP |
666 | if (error) |
667 | return error; | |
1da177e4 LT |
668 | ATM_SD(sock)->local.sas_family = AF_ATMSVC; |
669 | ATM_SD(sock)->remote.sas_family = AF_ATMSVC; | |
670 | return 0; | |
671 | } | |
672 | ||
ec1b4cf7 | 673 | static const struct net_proto_family svc_family_ops = { |
1da177e4 LT |
674 | .family = PF_ATMSVC, |
675 | .create = svc_create, | |
676 | .owner = THIS_MODULE, | |
677 | }; | |
678 | ||
679 | ||
680 | /* | |
681 | * Initialize the ATM SVC protocol family | |
682 | */ | |
683 | ||
684 | int __init atmsvc_init(void) | |
685 | { | |
686 | return sock_register(&svc_family_ops); | |
687 | } | |
688 | ||
689 | void atmsvc_exit(void) | |
690 | { | |
691 | sock_unregister(PF_ATMSVC); | |
692 | } |