blob: 1ba23f5018e76199a7fb19be5079b512822f3dab [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001/* net/atm/svc.c - ATM SVC sockets */
2
3/* Written 1995-2000 by Werner Almesberger, EPFL LRC/ICA */
4
Joe Perches99824462010-01-26 11:40:00 +00005#define pr_fmt(fmt) KBUILD_MODNAME ":%s: " fmt, __func__
Linus Torvalds1da177e2005-04-16 15:20:36 -07006
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_* */
Joe Perchesb7d93712010-01-26 11:40:18 +000022#include <linux/uaccess.h>
Paul Gortmakerbc3b2d72011-07-15 11:47:34 -040023#include <linux/export.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070024
25#include "resources.h"
26#include "common.h" /* common for PVCs and SVCs */
27#include "signaling.h"
28#include "addr.h"
29
Joe Perchesb7d93712010-01-26 11:40:18 +000030static int svc_create(struct net *net, struct socket *sock, int protocol,
31 int kern);
Linus Torvalds1da177e2005-04-16 15:20:36 -070032
Linus Torvalds1da177e2005-04-16 15:20:36 -070033/*
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
Joe Perchesb7d93712010-01-26 11:40:18 +000040static int svc_shutdown(struct socket *sock, int how)
Linus Torvalds1da177e2005-04-16 15:20:36 -070041{
42 return 0;
43}
44
Linus Torvalds1da177e2005-04-16 15:20:36 -070045static 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
Joe Perchesb7d93712010-01-26 11:40:18 +000051 pr_debug("%p\n", vcc);
52 if (test_bit(ATM_VF_REGIS, &vcc->flags)) {
Joe Perchesb7d93712010-01-26 11:40:18 +000053 sigd_enq(vcc, as_close, NULL, NULL, NULL);
chas williams - CONTRACTORde713b52014-08-12 08:12:26 -040054 for (;;) {
55 prepare_to_wait(sk_sleep(sk), &wait, TASK_UNINTERRUPTIBLE);
56 if (test_bit(ATM_VF_RELEASED, &vcc->flags) || !sigd)
57 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -070058 schedule();
Linus Torvalds1da177e2005-04-16 15:20:36 -070059 }
Eric Dumazetaa395142010-04-20 13:03:51 +000060 finish_wait(sk_sleep(sk), &wait);
Linus Torvalds1da177e2005-04-16 15:20:36 -070061 }
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);
Stephen Hemminger52240062007-08-28 15:22:09 -070066 pr_debug("LISTEN REL\n");
Joe Perchesb7d93712010-01-26 11:40:18 +000067 sigd_enq2(NULL, as_reject, vcc, NULL, NULL, &vcc->qos, 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -070068 dev_kfree_skb(skb);
69 }
70 clear_bit(ATM_VF_REGIS, &vcc->flags);
71 /* ... may retry later */
72}
73
Linus Torvalds1da177e2005-04-16 15:20:36 -070074static int svc_release(struct socket *sock)
75{
76 struct sock *sk = sock->sk;
77 struct atm_vcc *vcc;
78
Joe Perchesb7d93712010-01-26 11:40:18 +000079 if (sk) {
Linus Torvalds1da177e2005-04-16 15:20:36 -070080 vcc = ATM_SD(sock);
Joe Perches99824462010-01-26 11:40:00 +000081 pr_debug("%p\n", vcc);
Linus Torvalds1da177e2005-04-16 15:20:36 -070082 clear_bit(ATM_VF_READY, &vcc->flags);
Joe Perchesb7d93712010-01-26 11:40:18 +000083 /*
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 */
Linus Torvalds1da177e2005-04-16 15:20:36 -070088 svc_disconnect(vcc);
89 vcc_release(sock);
90 }
91 return 0;
92}
93
Joe Perchesb7d93712010-01-26 11:40:18 +000094static int svc_bind(struct socket *sock, struct sockaddr *sockaddr,
95 int sockaddr_len)
Linus Torvalds1da177e2005-04-16 15:20:36 -070096{
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);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700115 addr = (struct sockaddr_atmsvc *) sockaddr;
116 if (addr->sas_family != AF_ATMSVC) {
117 error = -EAFNOSUPPORT;
118 goto out;
119 }
Joe Perchesb7d93712010-01-26 11:40:18 +0000120 clear_bit(ATM_VF_BOUND, &vcc->flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700121 /* failing rebind will kill old binding */
122 /* @@@ check memory (de)allocation on rebind */
Joe Perchesb7d93712010-01-26 11:40:18 +0000123 if (!test_bit(ATM_VF_HASQOS, &vcc->flags)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700124 error = -EBADFD;
125 goto out;
126 }
127 vcc->local = *addr;
128 set_bit(ATM_VF_WAITING, &vcc->flags);
Joe Perchesb7d93712010-01-26 11:40:18 +0000129 sigd_enq(vcc, as_bind, NULL, NULL, &vcc->local);
chas williams - CONTRACTORde713b52014-08-12 08:12:26 -0400130 for (;;) {
Eric Dumazetaa395142010-04-20 13:03:51 +0000131 prepare_to_wait(sk_sleep(sk), &wait, TASK_UNINTERRUPTIBLE);
chas williams - CONTRACTORde713b52014-08-12 08:12:26 -0400132 if (!test_bit(ATM_VF_WAITING, &vcc->flags) || !sigd)
133 break;
134 schedule();
Linus Torvalds1da177e2005-04-16 15:20:36 -0700135 }
Eric Dumazetaa395142010-04-20 13:03:51 +0000136 finish_wait(sk_sleep(sk), &wait);
Joe Perchesb7d93712010-01-26 11:40:18 +0000137 clear_bit(ATM_VF_REGIS, &vcc->flags); /* doesn't count */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700138 if (!sigd) {
139 error = -EUNATCH;
140 goto out;
141 }
YOSHIFUJI Hideakif7d57452007-02-09 23:24:29 +0900142 if (!sk->sk_err)
Joe Perchesb7d93712010-01-26 11:40:18 +0000143 set_bit(ATM_VF_BOUND, &vcc->flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700144 error = -sk->sk_err;
145out:
146 release_sock(sk);
147 return error;
148}
149
Joe Perchesb7d93712010-01-26 11:40:18 +0000150static int svc_connect(struct socket *sock, struct sockaddr *sockaddr,
151 int sockaddr_len, int flags)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700152{
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
Joe Perchesb7d93712010-01-26 11:40:18 +0000159 pr_debug("%p\n", vcc);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700160 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);
Joe Perchesb7d93712010-01-26 11:40:18 +0000206 sigd_enq(vcc, as_connect, NULL, NULL, &vcc->remote);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700207 if (flags & O_NONBLOCK) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700208 sock->state = SS_CONNECTING;
209 error = -EINPROGRESS;
210 goto out;
211 }
212 error = 0;
chas williams - CONTRACTORde713b52014-08-12 08:12:26 -0400213 prepare_to_wait(sk_sleep(sk), &wait, TASK_INTERRUPTIBLE);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700214 while (test_bit(ATM_VF_WAITING, &vcc->flags) && sigd) {
215 schedule();
216 if (!signal_pending(current)) {
Eric Dumazetaa395142010-04-20 13:03:51 +0000217 prepare_to_wait(sk_sleep(sk), &wait,
Joe Perchesb7d93712010-01-26 11:40:18 +0000218 TASK_INTERRUPTIBLE);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700219 continue;
220 }
Stephen Hemminger52240062007-08-28 15:22:09 -0700221 pr_debug("*ABORT*\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700222 /*
223 * This is tricky:
224 * Kernel ---close--> Demon
225 * Kernel <--close--- Demon
YOSHIFUJI Hideakif7d57452007-02-09 23:24:29 +0900226 * or
Linus Torvalds1da177e2005-04-16 15:20:36 -0700227 * Kernel ---close--> Demon
228 * Kernel <--error--- Demon
229 * or
230 * Kernel ---close--> Demon
231 * Kernel <--okay---- Demon
232 * Kernel <--close--- Demon
233 */
Joe Perchesb7d93712010-01-26 11:40:18 +0000234 sigd_enq(vcc, as_close, NULL, NULL, NULL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700235 while (test_bit(ATM_VF_WAITING, &vcc->flags) && sigd) {
Eric Dumazetaa395142010-04-20 13:03:51 +0000236 prepare_to_wait(sk_sleep(sk), &wait,
Joe Perchesb7d93712010-01-26 11:40:18 +0000237 TASK_INTERRUPTIBLE);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700238 schedule();
239 }
240 if (!sk->sk_err)
Joe Perchesb7d93712010-01-26 11:40:18 +0000241 while (!test_bit(ATM_VF_RELEASED, &vcc->flags) &&
242 sigd) {
Eric Dumazetaa395142010-04-20 13:03:51 +0000243 prepare_to_wait(sk_sleep(sk), &wait,
Joe Perchesb7d93712010-01-26 11:40:18 +0000244 TASK_INTERRUPTIBLE);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700245 schedule();
246 }
Joe Perchesb7d93712010-01-26 11:40:18 +0000247 clear_bit(ATM_VF_REGIS, &vcc->flags);
248 clear_bit(ATM_VF_RELEASED, &vcc->flags);
249 clear_bit(ATM_VF_CLOSE, &vcc->flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700250 /* we're gone now but may connect later */
251 error = -EINTR;
252 break;
253 }
Eric Dumazetaa395142010-04-20 13:03:51 +0000254 finish_wait(sk_sleep(sk), &wait);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700255 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 }
Paul Bolle391296c2014-05-27 17:07:12 +0200266
Linus Torvalds1da177e2005-04-16 15:20:36 -0700267 vcc->qos.txtp.max_pcr = SELECT_TOP_PCR(vcc->qos.txtp);
268 vcc->qos.txtp.pcr = 0;
269 vcc->qos.txtp.min_pcr = 0;
Paul Bolle391296c2014-05-27 17:07:12 +0200270
Joe Perchesb7d93712010-01-26 11:40:18 +0000271 error = vcc_connect(sock, vcc->itf, vcc->vpi, vcc->vci);
272 if (!error)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700273 sock->state = SS_CONNECTED;
274 else
Joe Perchesb7d93712010-01-26 11:40:18 +0000275 (void)svc_disconnect(vcc);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700276out:
277 release_sock(sk);
278 return error;
279}
280
Joe Perchesb7d93712010-01-26 11:40:18 +0000281static int svc_listen(struct socket *sock, int backlog)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700282{
283 DEFINE_WAIT(wait);
284 struct sock *sk = sock->sk;
285 struct atm_vcc *vcc = ATM_SD(sock);
286 int error;
287
Joe Perches99824462010-01-26 11:40:00 +0000288 pr_debug("%p\n", vcc);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700289 lock_sock(sk);
290 /* let server handle listen on unbound sockets */
Joe Perchesb7d93712010-01-26 11:40:18 +0000291 if (test_bit(ATM_VF_SESSION, &vcc->flags)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700292 error = -EINVAL;
293 goto out;
294 }
Chas Williams17b24b32008-12-04 14:58:13 -0800295 if (test_bit(ATM_VF_LISTEN, &vcc->flags)) {
296 error = -EADDRINUSE;
297 goto out;
Joe Perchesb7d93712010-01-26 11:40:18 +0000298 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700299 set_bit(ATM_VF_WAITING, &vcc->flags);
Joe Perchesb7d93712010-01-26 11:40:18 +0000300 sigd_enq(vcc, as_listen, NULL, NULL, &vcc->local);
chas williams - CONTRACTORde713b52014-08-12 08:12:26 -0400301 for (;;) {
Eric Dumazetaa395142010-04-20 13:03:51 +0000302 prepare_to_wait(sk_sleep(sk), &wait, TASK_UNINTERRUPTIBLE);
chas williams - CONTRACTORde713b52014-08-12 08:12:26 -0400303 if (!test_bit(ATM_VF_WAITING, &vcc->flags) || !sigd)
304 break;
305 schedule();
Linus Torvalds1da177e2005-04-16 15:20:36 -0700306 }
Eric Dumazetaa395142010-04-20 13:03:51 +0000307 finish_wait(sk_sleep(sk), &wait);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700308 if (!sigd) {
309 error = -EUNATCH;
310 goto out;
311 }
Joe Perchesb7d93712010-01-26 11:40:18 +0000312 set_bit(ATM_VF_LISTEN, &vcc->flags);
Chas Williams17b24b32008-12-04 14:58:13 -0800313 vcc_insert_socket(sk);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700314 sk->sk_max_ack_backlog = backlog > 0 ? backlog : ATM_BACKLOG_DEFAULT;
315 error = -sk->sk_err;
316out:
317 release_sock(sk);
318 return error;
319}
320
Joe Perchesb7d93712010-01-26 11:40:18 +0000321static int svc_accept(struct socket *sock, struct socket *newsock, int flags)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700322{
323 struct sock *sk = sock->sk;
324 struct sk_buff *skb;
325 struct atmsvc_msg *msg;
326 struct atm_vcc *old_vcc = ATM_SD(sock);
327 struct atm_vcc *new_vcc;
328 int error;
329
330 lock_sock(sk);
331
Eric Paris3f378b62009-11-05 22:18:14 -0800332 error = svc_create(sock_net(sk), newsock, 0, 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700333 if (error)
334 goto out;
335
336 new_vcc = ATM_SD(newsock);
337
Joe Perches99824462010-01-26 11:40:00 +0000338 pr_debug("%p -> %p\n", old_vcc, new_vcc);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700339 while (1) {
340 DEFINE_WAIT(wait);
341
Eric Dumazetaa395142010-04-20 13:03:51 +0000342 prepare_to_wait(sk_sleep(sk), &wait, TASK_INTERRUPTIBLE);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700343 while (!(skb = skb_dequeue(&sk->sk_receive_queue)) &&
344 sigd) {
Joe Perchesb7d93712010-01-26 11:40:18 +0000345 if (test_bit(ATM_VF_RELEASED, &old_vcc->flags))
346 break;
347 if (test_bit(ATM_VF_CLOSE, &old_vcc->flags)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700348 error = -sk->sk_err;
349 break;
350 }
351 if (flags & O_NONBLOCK) {
352 error = -EAGAIN;
353 break;
354 }
355 release_sock(sk);
356 schedule();
357 lock_sock(sk);
358 if (signal_pending(current)) {
359 error = -ERESTARTSYS;
360 break;
361 }
Eric Dumazetaa395142010-04-20 13:03:51 +0000362 prepare_to_wait(sk_sleep(sk), &wait,
Joe Perchesb7d93712010-01-26 11:40:18 +0000363 TASK_INTERRUPTIBLE);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700364 }
Eric Dumazetaa395142010-04-20 13:03:51 +0000365 finish_wait(sk_sleep(sk), &wait);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700366 if (error)
367 goto out;
368 if (!skb) {
369 error = -EUNATCH;
370 goto out;
371 }
Joe Perchesb7d93712010-01-26 11:40:18 +0000372 msg = (struct atmsvc_msg *)skb->data;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700373 new_vcc->qos = msg->qos;
Joe Perchesb7d93712010-01-26 11:40:18 +0000374 set_bit(ATM_VF_HASQOS, &new_vcc->flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700375 new_vcc->remote = msg->svc;
376 new_vcc->local = msg->local;
377 new_vcc->sap = msg->sap;
378 error = vcc_connect(newsock, msg->pvc.sap_addr.itf,
Joe Perchesb7d93712010-01-26 11:40:18 +0000379 msg->pvc.sap_addr.vpi,
380 msg->pvc.sap_addr.vci);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700381 dev_kfree_skb(skb);
382 sk->sk_ack_backlog--;
383 if (error) {
Joe Perchesb7d93712010-01-26 11:40:18 +0000384 sigd_enq2(NULL, as_reject, old_vcc, NULL, NULL,
385 &old_vcc->qos, error);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700386 error = error == -EAGAIN ? -EBUSY : error;
387 goto out;
388 }
389 /* wait should be short, so we ignore the non-blocking flag */
390 set_bit(ATM_VF_WAITING, &new_vcc->flags);
Joe Perchesb7d93712010-01-26 11:40:18 +0000391 sigd_enq(new_vcc, as_accept, old_vcc, NULL, NULL);
chas williams - CONTRACTORde713b52014-08-12 08:12:26 -0400392 for (;;) {
393 prepare_to_wait(sk_sleep(sk_atm(new_vcc)), &wait,
394 TASK_UNINTERRUPTIBLE);
395 if (!test_bit(ATM_VF_WAITING, &new_vcc->flags) || !sigd)
396 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700397 release_sock(sk);
398 schedule();
399 lock_sock(sk);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700400 }
Eric Dumazetaa395142010-04-20 13:03:51 +0000401 finish_wait(sk_sleep(sk_atm(new_vcc)), &wait);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700402 if (!sigd) {
403 error = -EUNATCH;
404 goto out;
405 }
406 if (!sk_atm(new_vcc)->sk_err)
407 break;
408 if (sk_atm(new_vcc)->sk_err != ERESTARTSYS) {
409 error = -sk_atm(new_vcc)->sk_err;
410 goto out;
411 }
412 }
413 newsock->state = SS_CONNECTED;
414out:
415 release_sock(sk);
416 return error;
417}
418
Joe Perchesb7d93712010-01-26 11:40:18 +0000419static int svc_getname(struct socket *sock, struct sockaddr *sockaddr,
420 int *sockaddr_len, int peer)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700421{
422 struct sockaddr_atmsvc *addr;
423
424 *sockaddr_len = sizeof(struct sockaddr_atmsvc);
425 addr = (struct sockaddr_atmsvc *) sockaddr;
Joe Perchesb7d93712010-01-26 11:40:18 +0000426 memcpy(addr, peer ? &ATM_SD(sock)->remote : &ATM_SD(sock)->local,
427 sizeof(struct sockaddr_atmsvc));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700428 return 0;
429}
430
Joe Perchesb7d93712010-01-26 11:40:18 +0000431int svc_change_qos(struct atm_vcc *vcc, struct atm_qos *qos)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700432{
433 struct sock *sk = sk_atm(vcc);
434 DEFINE_WAIT(wait);
435
436 set_bit(ATM_VF_WAITING, &vcc->flags);
Joe Perchesb7d93712010-01-26 11:40:18 +0000437 sigd_enq2(vcc, as_modify, NULL, NULL, &vcc->local, qos, 0);
chas williams - CONTRACTORde713b52014-08-12 08:12:26 -0400438 for (;;) {
Eric Dumazetaa395142010-04-20 13:03:51 +0000439 prepare_to_wait(sk_sleep(sk), &wait, TASK_UNINTERRUPTIBLE);
chas williams - CONTRACTORde713b52014-08-12 08:12:26 -0400440 if (!test_bit(ATM_VF_WAITING, &vcc->flags) ||
441 test_bit(ATM_VF_RELEASED, &vcc->flags) || !sigd) {
442 break;
443 }
444 schedule();
Linus Torvalds1da177e2005-04-16 15:20:36 -0700445 }
Eric Dumazetaa395142010-04-20 13:03:51 +0000446 finish_wait(sk_sleep(sk), &wait);
Joe Perchesb7d93712010-01-26 11:40:18 +0000447 if (!sigd)
448 return -EUNATCH;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700449 return -sk->sk_err;
450}
451
Linus Torvalds1da177e2005-04-16 15:20:36 -0700452static int svc_setsockopt(struct socket *sock, int level, int optname,
David S. Millerb7058842009-09-30 16:12:20 -0700453 char __user *optval, unsigned int optlen)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700454{
455 struct sock *sk = sock->sk;
456 struct atm_vcc *vcc = ATM_SD(sock);
457 int value, error = 0;
458
459 lock_sock(sk);
460 switch (optname) {
Joe Perchesb7d93712010-01-26 11:40:18 +0000461 case SO_ATMSAP:
462 if (level != SOL_ATM || optlen != sizeof(struct atm_sap)) {
463 error = -EINVAL;
464 goto out;
465 }
466 if (copy_from_user(&vcc->sap, optval, optlen)) {
467 error = -EFAULT;
468 goto out;
469 }
470 set_bit(ATM_VF_HASSAP, &vcc->flags);
471 break;
472 case SO_MULTIPOINT:
473 if (level != SOL_ATM || optlen != sizeof(int)) {
474 error = -EINVAL;
475 goto out;
476 }
477 if (get_user(value, (int __user *)optval)) {
478 error = -EFAULT;
479 goto out;
480 }
481 if (value == 1)
482 set_bit(ATM_VF_SESSION, &vcc->flags);
483 else if (value == 0)
484 clear_bit(ATM_VF_SESSION, &vcc->flags);
485 else
486 error = -EINVAL;
487 break;
488 default:
489 error = vcc_setsockopt(sock, level, optname, optval, optlen);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700490 }
491
492out:
493 release_sock(sk);
494 return error;
495}
496
Joe Perchesb7d93712010-01-26 11:40:18 +0000497static int svc_getsockopt(struct socket *sock, int level, int optname,
498 char __user *optval, int __user *optlen)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700499{
500 struct sock *sk = sock->sk;
501 int error = 0, len;
502
503 lock_sock(sk);
504 if (!__SO_LEVEL_MATCH(optname, level) || optname != SO_ATMSAP) {
505 error = vcc_getsockopt(sock, level, optname, optval, optlen);
506 goto out;
507 }
508 if (get_user(len, optlen)) {
509 error = -EFAULT;
510 goto out;
511 }
512 if (len != sizeof(struct atm_sap)) {
513 error = -EINVAL;
514 goto out;
515 }
516 if (copy_to_user(optval, &ATM_SD(sock)->sap, sizeof(struct atm_sap))) {
517 error = -EFAULT;
518 goto out;
519 }
520out:
521 release_sock(sk);
522 return error;
523}
524
Linus Torvalds1da177e2005-04-16 15:20:36 -0700525static int svc_addparty(struct socket *sock, struct sockaddr *sockaddr,
526 int sockaddr_len, int flags)
527{
528 DEFINE_WAIT(wait);
529 struct sock *sk = sock->sk;
530 struct atm_vcc *vcc = ATM_SD(sock);
531 int error;
532
533 lock_sock(sk);
534 set_bit(ATM_VF_WAITING, &vcc->flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700535 sigd_enq(vcc, as_addparty, NULL, NULL,
YOSHIFUJI Hideakif7d57452007-02-09 23:24:29 +0900536 (struct sockaddr_atmsvc *) sockaddr);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700537 if (flags & O_NONBLOCK) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700538 error = -EINPROGRESS;
539 goto out;
540 }
Joe Perches99824462010-01-26 11:40:00 +0000541 pr_debug("added wait queue\n");
chas williams - CONTRACTORde713b52014-08-12 08:12:26 -0400542 for (;;) {
Eric Dumazetaa395142010-04-20 13:03:51 +0000543 prepare_to_wait(sk_sleep(sk), &wait, TASK_INTERRUPTIBLE);
chas williams - CONTRACTORde713b52014-08-12 08:12:26 -0400544 if (!test_bit(ATM_VF_WAITING, &vcc->flags) || !sigd)
545 break;
546 schedule();
Linus Torvalds1da177e2005-04-16 15:20:36 -0700547 }
Eric Dumazetaa395142010-04-20 13:03:51 +0000548 finish_wait(sk_sleep(sk), &wait);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700549 error = xchg(&sk->sk_err_soft, 0);
550out:
551 release_sock(sk);
552 return error;
553}
554
Linus Torvalds1da177e2005-04-16 15:20:36 -0700555static int svc_dropparty(struct socket *sock, int ep_ref)
556{
557 DEFINE_WAIT(wait);
558 struct sock *sk = sock->sk;
559 struct atm_vcc *vcc = ATM_SD(sock);
560 int error;
561
562 lock_sock(sk);
563 set_bit(ATM_VF_WAITING, &vcc->flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700564 sigd_enq2(vcc, as_dropparty, NULL, NULL, NULL, NULL, ep_ref);
chas williams - CONTRACTORde713b52014-08-12 08:12:26 -0400565 for (;;) {
Eric Dumazetaa395142010-04-20 13:03:51 +0000566 prepare_to_wait(sk_sleep(sk), &wait, TASK_INTERRUPTIBLE);
chas williams - CONTRACTORde713b52014-08-12 08:12:26 -0400567 if (!test_bit(ATM_VF_WAITING, &vcc->flags) || !sigd)
568 break;
569 schedule();
Linus Torvalds1da177e2005-04-16 15:20:36 -0700570 }
Eric Dumazetaa395142010-04-20 13:03:51 +0000571 finish_wait(sk_sleep(sk), &wait);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700572 if (!sigd) {
573 error = -EUNATCH;
574 goto out;
575 }
576 error = xchg(&sk->sk_err_soft, 0);
577out:
578 release_sock(sk);
579 return error;
580}
581
Linus Torvalds1da177e2005-04-16 15:20:36 -0700582static int svc_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
583{
YOSHIFUJI Hideakif7d57452007-02-09 23:24:29 +0900584 int error, ep_ref;
585 struct sockaddr_atmsvc sa;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700586 struct atm_vcc *vcc = ATM_SD(sock);
YOSHIFUJI Hideakif7d57452007-02-09 23:24:29 +0900587
Linus Torvalds1da177e2005-04-16 15:20:36 -0700588 switch (cmd) {
Joe Perchesb7d93712010-01-26 11:40:18 +0000589 case ATM_ADDPARTY:
590 if (!test_bit(ATM_VF_SESSION, &vcc->flags))
591 return -EINVAL;
592 if (copy_from_user(&sa, (void __user *) arg, sizeof(sa)))
593 return -EFAULT;
594 error = svc_addparty(sock, (struct sockaddr *)&sa, sizeof(sa),
595 0);
596 break;
597 case ATM_DROPPARTY:
598 if (!test_bit(ATM_VF_SESSION, &vcc->flags))
599 return -EINVAL;
600 if (copy_from_user(&ep_ref, (void __user *) arg, sizeof(int)))
601 return -EFAULT;
602 error = svc_dropparty(sock, ep_ref);
603 break;
604 default:
605 error = vcc_ioctl(sock, cmd, arg);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700606 }
607
608 return error;
609}
610
David Woodhouse8865c412008-12-03 22:12:38 -0800611#ifdef CONFIG_COMPAT
Joe Perchesb7d93712010-01-26 11:40:18 +0000612static int svc_compat_ioctl(struct socket *sock, unsigned int cmd,
613 unsigned long arg)
David Woodhouse8865c412008-12-03 22:12:38 -0800614{
615 /* The definition of ATM_ADDPARTY uses the size of struct atm_iobuf.
616 But actually it takes a struct sockaddr_atmsvc, which doesn't need
617 compat handling. So all we have to do is fix up cmd... */
618 if (cmd == COMPAT_ATM_ADDPARTY)
619 cmd = ATM_ADDPARTY;
620
621 if (cmd == ATM_ADDPARTY || cmd == ATM_DROPPARTY)
622 return svc_ioctl(sock, cmd, arg);
623 else
624 return vcc_compat_ioctl(sock, cmd, arg);
625}
626#endif /* CONFIG_COMPAT */
627
Eric Dumazet90ddc4f2005-12-22 12:49:22 -0800628static const struct proto_ops svc_proto_ops = {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700629 .family = PF_ATMSVC,
630 .owner = THIS_MODULE,
631
632 .release = svc_release,
633 .bind = svc_bind,
634 .connect = svc_connect,
635 .socketpair = sock_no_socketpair,
636 .accept = svc_accept,
637 .getname = svc_getname,
638 .poll = vcc_poll,
639 .ioctl = svc_ioctl,
David Woodhouse8865c412008-12-03 22:12:38 -0800640#ifdef CONFIG_COMPAT
641 .compat_ioctl = svc_compat_ioctl,
642#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700643 .listen = svc_listen,
644 .shutdown = svc_shutdown,
645 .setsockopt = svc_setsockopt,
646 .getsockopt = svc_getsockopt,
647 .sendmsg = vcc_sendmsg,
648 .recvmsg = vcc_recvmsg,
649 .mmap = sock_no_mmap,
650 .sendpage = sock_no_sendpage,
651};
652
653
Eric Paris3f378b62009-11-05 22:18:14 -0800654static int svc_create(struct net *net, struct socket *sock, int protocol,
655 int kern)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700656{
657 int error;
658
Octavian Purdila09ad9bc2009-11-25 15:14:13 -0800659 if (!net_eq(net, &init_net))
Eric W. Biederman1b8d7ae2007-10-08 23:24:22 -0700660 return -EAFNOSUPPORT;
661
Linus Torvalds1da177e2005-04-16 15:20:36 -0700662 sock->ops = &svc_proto_ops;
Eric W. Biederman1b8d7ae2007-10-08 23:24:22 -0700663 error = vcc_create(net, sock, protocol, AF_ATMSVC);
Joe Perchesb7d93712010-01-26 11:40:18 +0000664 if (error)
665 return error;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700666 ATM_SD(sock)->local.sas_family = AF_ATMSVC;
667 ATM_SD(sock)->remote.sas_family = AF_ATMSVC;
668 return 0;
669}
670
Stephen Hemmingerec1b4cf2009-10-05 05:58:39 +0000671static const struct net_proto_family svc_family_ops = {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700672 .family = PF_ATMSVC,
673 .create = svc_create,
674 .owner = THIS_MODULE,
675};
676
677
678/*
679 * Initialize the ATM SVC protocol family
680 */
681
682int __init atmsvc_init(void)
683{
684 return sock_register(&svc_family_ops);
685}
686
687void atmsvc_exit(void)
688{
689 sock_unregister(PF_ATMSVC);
690}