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 | } | |
391296c9 | 266 | |
1da177e4 LT |
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; | |
391296c9 | 270 | |
b7d9371b JP |
271 | error = vcc_connect(sock, vcc->itf, vcc->vpi, vcc->vci); |
272 | if (!error) | |
1da177e4 LT |
273 | sock->state = SS_CONNECTED; |
274 | else | |
b7d9371b | 275 | (void)svc_disconnect(vcc); |
1da177e4 LT |
276 | out: |
277 | release_sock(sk); | |
278 | return error; | |
279 | } | |
280 | ||
b7d9371b | 281 | static int svc_listen(struct socket *sock, int backlog) |
1da177e4 LT |
282 | { |
283 | DEFINE_WAIT(wait); | |
284 | struct sock *sk = sock->sk; | |
285 | struct atm_vcc *vcc = ATM_SD(sock); | |
286 | int error; | |
287 | ||
99824461 | 288 | pr_debug("%p\n", vcc); |
1da177e4 LT |
289 | lock_sock(sk); |
290 | /* let server handle listen on unbound sockets */ | |
b7d9371b | 291 | if (test_bit(ATM_VF_SESSION, &vcc->flags)) { |
1da177e4 LT |
292 | error = -EINVAL; |
293 | goto out; | |
294 | } | |
17b24b3c CW |
295 | if (test_bit(ATM_VF_LISTEN, &vcc->flags)) { |
296 | error = -EADDRINUSE; | |
297 | goto out; | |
b7d9371b | 298 | } |
1da177e4 | 299 | set_bit(ATM_VF_WAITING, &vcc->flags); |
aa395145 | 300 | prepare_to_wait(sk_sleep(sk), &wait, TASK_UNINTERRUPTIBLE); |
b7d9371b | 301 | sigd_enq(vcc, as_listen, NULL, NULL, &vcc->local); |
1da177e4 LT |
302 | while (test_bit(ATM_VF_WAITING, &vcc->flags) && sigd) { |
303 | schedule(); | |
aa395145 | 304 | prepare_to_wait(sk_sleep(sk), &wait, TASK_UNINTERRUPTIBLE); |
1da177e4 | 305 | } |
aa395145 | 306 | finish_wait(sk_sleep(sk), &wait); |
1da177e4 LT |
307 | if (!sigd) { |
308 | error = -EUNATCH; | |
309 | goto out; | |
310 | } | |
b7d9371b | 311 | set_bit(ATM_VF_LISTEN, &vcc->flags); |
17b24b3c | 312 | vcc_insert_socket(sk); |
1da177e4 LT |
313 | sk->sk_max_ack_backlog = backlog > 0 ? backlog : ATM_BACKLOG_DEFAULT; |
314 | error = -sk->sk_err; | |
315 | out: | |
316 | release_sock(sk); | |
317 | return error; | |
318 | } | |
319 | ||
b7d9371b | 320 | static int svc_accept(struct socket *sock, struct socket *newsock, int flags) |
1da177e4 LT |
321 | { |
322 | struct sock *sk = sock->sk; | |
323 | struct sk_buff *skb; | |
324 | struct atmsvc_msg *msg; | |
325 | struct atm_vcc *old_vcc = ATM_SD(sock); | |
326 | struct atm_vcc *new_vcc; | |
327 | int error; | |
328 | ||
329 | lock_sock(sk); | |
330 | ||
3f378b68 | 331 | error = svc_create(sock_net(sk), newsock, 0, 0); |
1da177e4 LT |
332 | if (error) |
333 | goto out; | |
334 | ||
335 | new_vcc = ATM_SD(newsock); | |
336 | ||
99824461 | 337 | pr_debug("%p -> %p\n", old_vcc, new_vcc); |
1da177e4 LT |
338 | while (1) { |
339 | DEFINE_WAIT(wait); | |
340 | ||
aa395145 | 341 | prepare_to_wait(sk_sleep(sk), &wait, TASK_INTERRUPTIBLE); |
1da177e4 LT |
342 | while (!(skb = skb_dequeue(&sk->sk_receive_queue)) && |
343 | sigd) { | |
b7d9371b JP |
344 | if (test_bit(ATM_VF_RELEASED, &old_vcc->flags)) |
345 | break; | |
346 | if (test_bit(ATM_VF_CLOSE, &old_vcc->flags)) { | |
1da177e4 LT |
347 | error = -sk->sk_err; |
348 | break; | |
349 | } | |
350 | if (flags & O_NONBLOCK) { | |
351 | error = -EAGAIN; | |
352 | break; | |
353 | } | |
354 | release_sock(sk); | |
355 | schedule(); | |
356 | lock_sock(sk); | |
357 | if (signal_pending(current)) { | |
358 | error = -ERESTARTSYS; | |
359 | break; | |
360 | } | |
aa395145 | 361 | prepare_to_wait(sk_sleep(sk), &wait, |
b7d9371b | 362 | TASK_INTERRUPTIBLE); |
1da177e4 | 363 | } |
aa395145 | 364 | finish_wait(sk_sleep(sk), &wait); |
1da177e4 LT |
365 | if (error) |
366 | goto out; | |
367 | if (!skb) { | |
368 | error = -EUNATCH; | |
369 | goto out; | |
370 | } | |
b7d9371b | 371 | msg = (struct atmsvc_msg *)skb->data; |
1da177e4 | 372 | new_vcc->qos = msg->qos; |
b7d9371b | 373 | set_bit(ATM_VF_HASQOS, &new_vcc->flags); |
1da177e4 LT |
374 | new_vcc->remote = msg->svc; |
375 | new_vcc->local = msg->local; | |
376 | new_vcc->sap = msg->sap; | |
377 | error = vcc_connect(newsock, msg->pvc.sap_addr.itf, | |
b7d9371b JP |
378 | msg->pvc.sap_addr.vpi, |
379 | msg->pvc.sap_addr.vci); | |
1da177e4 LT |
380 | dev_kfree_skb(skb); |
381 | sk->sk_ack_backlog--; | |
382 | if (error) { | |
b7d9371b JP |
383 | sigd_enq2(NULL, as_reject, old_vcc, NULL, NULL, |
384 | &old_vcc->qos, error); | |
1da177e4 LT |
385 | error = error == -EAGAIN ? -EBUSY : error; |
386 | goto out; | |
387 | } | |
388 | /* wait should be short, so we ignore the non-blocking flag */ | |
389 | set_bit(ATM_VF_WAITING, &new_vcc->flags); | |
aa395145 | 390 | prepare_to_wait(sk_sleep(sk_atm(new_vcc)), &wait, |
b7d9371b JP |
391 | TASK_UNINTERRUPTIBLE); |
392 | sigd_enq(new_vcc, as_accept, old_vcc, NULL, NULL); | |
1da177e4 LT |
393 | while (test_bit(ATM_VF_WAITING, &new_vcc->flags) && sigd) { |
394 | release_sock(sk); | |
395 | schedule(); | |
396 | lock_sock(sk); | |
aa395145 | 397 | prepare_to_wait(sk_sleep(sk_atm(new_vcc)), &wait, |
b7d9371b | 398 | TASK_UNINTERRUPTIBLE); |
1da177e4 | 399 | } |
aa395145 | 400 | finish_wait(sk_sleep(sk_atm(new_vcc)), &wait); |
1da177e4 LT |
401 | if (!sigd) { |
402 | error = -EUNATCH; | |
403 | goto out; | |
404 | } | |
405 | if (!sk_atm(new_vcc)->sk_err) | |
406 | break; | |
407 | if (sk_atm(new_vcc)->sk_err != ERESTARTSYS) { | |
408 | error = -sk_atm(new_vcc)->sk_err; | |
409 | goto out; | |
410 | } | |
411 | } | |
412 | newsock->state = SS_CONNECTED; | |
413 | out: | |
414 | release_sock(sk); | |
415 | return error; | |
416 | } | |
417 | ||
b7d9371b JP |
418 | static int svc_getname(struct socket *sock, struct sockaddr *sockaddr, |
419 | int *sockaddr_len, int peer) | |
1da177e4 LT |
420 | { |
421 | struct sockaddr_atmsvc *addr; | |
422 | ||
423 | *sockaddr_len = sizeof(struct sockaddr_atmsvc); | |
424 | addr = (struct sockaddr_atmsvc *) sockaddr; | |
b7d9371b JP |
425 | memcpy(addr, peer ? &ATM_SD(sock)->remote : &ATM_SD(sock)->local, |
426 | sizeof(struct sockaddr_atmsvc)); | |
1da177e4 LT |
427 | return 0; |
428 | } | |
429 | ||
b7d9371b | 430 | int svc_change_qos(struct atm_vcc *vcc, struct atm_qos *qos) |
1da177e4 LT |
431 | { |
432 | struct sock *sk = sk_atm(vcc); | |
433 | DEFINE_WAIT(wait); | |
434 | ||
435 | set_bit(ATM_VF_WAITING, &vcc->flags); | |
aa395145 | 436 | prepare_to_wait(sk_sleep(sk), &wait, TASK_UNINTERRUPTIBLE); |
b7d9371b | 437 | sigd_enq2(vcc, as_modify, NULL, NULL, &vcc->local, qos, 0); |
1da177e4 LT |
438 | while (test_bit(ATM_VF_WAITING, &vcc->flags) && |
439 | !test_bit(ATM_VF_RELEASED, &vcc->flags) && sigd) { | |
440 | schedule(); | |
aa395145 | 441 | prepare_to_wait(sk_sleep(sk), &wait, TASK_UNINTERRUPTIBLE); |
1da177e4 | 442 | } |
aa395145 | 443 | finish_wait(sk_sleep(sk), &wait); |
b7d9371b JP |
444 | if (!sigd) |
445 | return -EUNATCH; | |
1da177e4 LT |
446 | return -sk->sk_err; |
447 | } | |
448 | ||
1da177e4 | 449 | static int svc_setsockopt(struct socket *sock, int level, int optname, |
b7058842 | 450 | char __user *optval, unsigned int optlen) |
1da177e4 LT |
451 | { |
452 | struct sock *sk = sock->sk; | |
453 | struct atm_vcc *vcc = ATM_SD(sock); | |
454 | int value, error = 0; | |
455 | ||
456 | lock_sock(sk); | |
457 | switch (optname) { | |
b7d9371b JP |
458 | case SO_ATMSAP: |
459 | if (level != SOL_ATM || optlen != sizeof(struct atm_sap)) { | |
460 | error = -EINVAL; | |
461 | goto out; | |
462 | } | |
463 | if (copy_from_user(&vcc->sap, optval, optlen)) { | |
464 | error = -EFAULT; | |
465 | goto out; | |
466 | } | |
467 | set_bit(ATM_VF_HASSAP, &vcc->flags); | |
468 | break; | |
469 | case SO_MULTIPOINT: | |
470 | if (level != SOL_ATM || optlen != sizeof(int)) { | |
471 | error = -EINVAL; | |
472 | goto out; | |
473 | } | |
474 | if (get_user(value, (int __user *)optval)) { | |
475 | error = -EFAULT; | |
476 | goto out; | |
477 | } | |
478 | if (value == 1) | |
479 | set_bit(ATM_VF_SESSION, &vcc->flags); | |
480 | else if (value == 0) | |
481 | clear_bit(ATM_VF_SESSION, &vcc->flags); | |
482 | else | |
483 | error = -EINVAL; | |
484 | break; | |
485 | default: | |
486 | error = vcc_setsockopt(sock, level, optname, optval, optlen); | |
1da177e4 LT |
487 | } |
488 | ||
489 | out: | |
490 | release_sock(sk); | |
491 | return error; | |
492 | } | |
493 | ||
b7d9371b JP |
494 | static int svc_getsockopt(struct socket *sock, int level, int optname, |
495 | char __user *optval, int __user *optlen) | |
1da177e4 LT |
496 | { |
497 | struct sock *sk = sock->sk; | |
498 | int error = 0, len; | |
499 | ||
500 | lock_sock(sk); | |
501 | if (!__SO_LEVEL_MATCH(optname, level) || optname != SO_ATMSAP) { | |
502 | error = vcc_getsockopt(sock, level, optname, optval, optlen); | |
503 | goto out; | |
504 | } | |
505 | if (get_user(len, optlen)) { | |
506 | error = -EFAULT; | |
507 | goto out; | |
508 | } | |
509 | if (len != sizeof(struct atm_sap)) { | |
510 | error = -EINVAL; | |
511 | goto out; | |
512 | } | |
513 | if (copy_to_user(optval, &ATM_SD(sock)->sap, sizeof(struct atm_sap))) { | |
514 | error = -EFAULT; | |
515 | goto out; | |
516 | } | |
517 | out: | |
518 | release_sock(sk); | |
519 | return error; | |
520 | } | |
521 | ||
1da177e4 LT |
522 | static int svc_addparty(struct socket *sock, struct sockaddr *sockaddr, |
523 | int sockaddr_len, int flags) | |
524 | { | |
525 | DEFINE_WAIT(wait); | |
526 | struct sock *sk = sock->sk; | |
527 | struct atm_vcc *vcc = ATM_SD(sock); | |
528 | int error; | |
529 | ||
530 | lock_sock(sk); | |
531 | set_bit(ATM_VF_WAITING, &vcc->flags); | |
aa395145 | 532 | prepare_to_wait(sk_sleep(sk), &wait, TASK_INTERRUPTIBLE); |
1da177e4 | 533 | sigd_enq(vcc, as_addparty, NULL, NULL, |
f7d57453 | 534 | (struct sockaddr_atmsvc *) sockaddr); |
1da177e4 | 535 | if (flags & O_NONBLOCK) { |
aa395145 | 536 | finish_wait(sk_sleep(sk), &wait); |
1da177e4 LT |
537 | error = -EINPROGRESS; |
538 | goto out; | |
539 | } | |
99824461 | 540 | pr_debug("added wait queue\n"); |
1da177e4 LT |
541 | while (test_bit(ATM_VF_WAITING, &vcc->flags) && sigd) { |
542 | schedule(); | |
aa395145 | 543 | prepare_to_wait(sk_sleep(sk), &wait, TASK_INTERRUPTIBLE); |
1da177e4 | 544 | } |
aa395145 | 545 | finish_wait(sk_sleep(sk), &wait); |
1da177e4 LT |
546 | error = xchg(&sk->sk_err_soft, 0); |
547 | out: | |
548 | release_sock(sk); | |
549 | return error; | |
550 | } | |
551 | ||
1da177e4 LT |
552 | static int svc_dropparty(struct socket *sock, int ep_ref) |
553 | { | |
554 | DEFINE_WAIT(wait); | |
555 | struct sock *sk = sock->sk; | |
556 | struct atm_vcc *vcc = ATM_SD(sock); | |
557 | int error; | |
558 | ||
559 | lock_sock(sk); | |
560 | set_bit(ATM_VF_WAITING, &vcc->flags); | |
aa395145 | 561 | prepare_to_wait(sk_sleep(sk), &wait, TASK_INTERRUPTIBLE); |
1da177e4 LT |
562 | sigd_enq2(vcc, as_dropparty, NULL, NULL, NULL, NULL, ep_ref); |
563 | while (test_bit(ATM_VF_WAITING, &vcc->flags) && sigd) { | |
564 | schedule(); | |
aa395145 | 565 | prepare_to_wait(sk_sleep(sk), &wait, TASK_INTERRUPTIBLE); |
1da177e4 | 566 | } |
aa395145 | 567 | finish_wait(sk_sleep(sk), &wait); |
1da177e4 LT |
568 | if (!sigd) { |
569 | error = -EUNATCH; | |
570 | goto out; | |
571 | } | |
572 | error = xchg(&sk->sk_err_soft, 0); | |
573 | out: | |
574 | release_sock(sk); | |
575 | return error; | |
576 | } | |
577 | ||
1da177e4 LT |
578 | static int svc_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg) |
579 | { | |
f7d57453 YH |
580 | int error, ep_ref; |
581 | struct sockaddr_atmsvc sa; | |
1da177e4 | 582 | struct atm_vcc *vcc = ATM_SD(sock); |
f7d57453 | 583 | |
1da177e4 | 584 | switch (cmd) { |
b7d9371b JP |
585 | case ATM_ADDPARTY: |
586 | if (!test_bit(ATM_VF_SESSION, &vcc->flags)) | |
587 | return -EINVAL; | |
588 | if (copy_from_user(&sa, (void __user *) arg, sizeof(sa))) | |
589 | return -EFAULT; | |
590 | error = svc_addparty(sock, (struct sockaddr *)&sa, sizeof(sa), | |
591 | 0); | |
592 | break; | |
593 | case ATM_DROPPARTY: | |
594 | if (!test_bit(ATM_VF_SESSION, &vcc->flags)) | |
595 | return -EINVAL; | |
596 | if (copy_from_user(&ep_ref, (void __user *) arg, sizeof(int))) | |
597 | return -EFAULT; | |
598 | error = svc_dropparty(sock, ep_ref); | |
599 | break; | |
600 | default: | |
601 | error = vcc_ioctl(sock, cmd, arg); | |
1da177e4 LT |
602 | } |
603 | ||
604 | return error; | |
605 | } | |
606 | ||
8865c418 | 607 | #ifdef CONFIG_COMPAT |
b7d9371b JP |
608 | static int svc_compat_ioctl(struct socket *sock, unsigned int cmd, |
609 | unsigned long arg) | |
8865c418 DW |
610 | { |
611 | /* The definition of ATM_ADDPARTY uses the size of struct atm_iobuf. | |
612 | But actually it takes a struct sockaddr_atmsvc, which doesn't need | |
613 | compat handling. So all we have to do is fix up cmd... */ | |
614 | if (cmd == COMPAT_ATM_ADDPARTY) | |
615 | cmd = ATM_ADDPARTY; | |
616 | ||
617 | if (cmd == ATM_ADDPARTY || cmd == ATM_DROPPARTY) | |
618 | return svc_ioctl(sock, cmd, arg); | |
619 | else | |
620 | return vcc_compat_ioctl(sock, cmd, arg); | |
621 | } | |
622 | #endif /* CONFIG_COMPAT */ | |
623 | ||
90ddc4f0 | 624 | static const struct proto_ops svc_proto_ops = { |
1da177e4 LT |
625 | .family = PF_ATMSVC, |
626 | .owner = THIS_MODULE, | |
627 | ||
628 | .release = svc_release, | |
629 | .bind = svc_bind, | |
630 | .connect = svc_connect, | |
631 | .socketpair = sock_no_socketpair, | |
632 | .accept = svc_accept, | |
633 | .getname = svc_getname, | |
634 | .poll = vcc_poll, | |
635 | .ioctl = svc_ioctl, | |
8865c418 DW |
636 | #ifdef CONFIG_COMPAT |
637 | .compat_ioctl = svc_compat_ioctl, | |
638 | #endif | |
1da177e4 LT |
639 | .listen = svc_listen, |
640 | .shutdown = svc_shutdown, | |
641 | .setsockopt = svc_setsockopt, | |
642 | .getsockopt = svc_getsockopt, | |
643 | .sendmsg = vcc_sendmsg, | |
644 | .recvmsg = vcc_recvmsg, | |
645 | .mmap = sock_no_mmap, | |
646 | .sendpage = sock_no_sendpage, | |
647 | }; | |
648 | ||
649 | ||
3f378b68 EP |
650 | static int svc_create(struct net *net, struct socket *sock, int protocol, |
651 | int kern) | |
1da177e4 LT |
652 | { |
653 | int error; | |
654 | ||
09ad9bc7 | 655 | if (!net_eq(net, &init_net)) |
1b8d7ae4 EB |
656 | return -EAFNOSUPPORT; |
657 | ||
1da177e4 | 658 | sock->ops = &svc_proto_ops; |
1b8d7ae4 | 659 | error = vcc_create(net, sock, protocol, AF_ATMSVC); |
b7d9371b JP |
660 | if (error) |
661 | return error; | |
1da177e4 LT |
662 | ATM_SD(sock)->local.sas_family = AF_ATMSVC; |
663 | ATM_SD(sock)->remote.sas_family = AF_ATMSVC; | |
664 | return 0; | |
665 | } | |
666 | ||
ec1b4cf7 | 667 | static const struct net_proto_family svc_family_ops = { |
1da177e4 LT |
668 | .family = PF_ATMSVC, |
669 | .create = svc_create, | |
670 | .owner = THIS_MODULE, | |
671 | }; | |
672 | ||
673 | ||
674 | /* | |
675 | * Initialize the ATM SVC protocol family | |
676 | */ | |
677 | ||
678 | int __init atmsvc_init(void) | |
679 | { | |
680 | return sock_register(&svc_family_ops); | |
681 | } | |
682 | ||
683 | void atmsvc_exit(void) | |
684 | { | |
685 | sock_unregister(PF_ATMSVC); | |
686 | } |