net: Remove unnecessary returns from void function()s
[linux-2.6.git] / net / atm / svc.c
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.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_* */
22 #include <linux/uaccess.h>
23
24 #include "resources.h"
25 #include "common.h"             /* common for PVCs and SVCs */
26 #include "signaling.h"
27 #include "addr.h"
28
29 static int svc_create(struct net *net, struct socket *sock, int protocol,
30                       int kern);
31
32 /*
33  * Note: since all this is still nicely synchronized with the signaling demon,
34  *       there's no need to protect sleep loops with clis. If signaling is
35  *       moved into the kernel, that would change.
36  */
37
38
39 static int svc_shutdown(struct socket *sock, int how)
40 {
41         return 0;
42 }
43
44 static void svc_disconnect(struct atm_vcc *vcc)
45 {
46         DEFINE_WAIT(wait);
47         struct sk_buff *skb;
48         struct sock *sk = sk_atm(vcc);
49
50         pr_debug("%p\n", vcc);
51         if (test_bit(ATM_VF_REGIS, &vcc->flags)) {
52                 prepare_to_wait(sk_sleep(sk), &wait, TASK_UNINTERRUPTIBLE);
53                 sigd_enq(vcc, as_close, NULL, NULL, NULL);
54                 while (!test_bit(ATM_VF_RELEASED, &vcc->flags) && sigd) {
55                         schedule();
56                         prepare_to_wait(sk_sleep(sk), &wait,
57                                         TASK_UNINTERRUPTIBLE);
58                 }
59                 finish_wait(sk_sleep(sk), &wait);
60         }
61         /* beware - socket is still in use by atmsigd until the last
62            as_indicate has been answered */
63         while ((skb = skb_dequeue(&sk->sk_receive_queue)) != NULL) {
64                 atm_return(vcc, skb->truesize);
65                 pr_debug("LISTEN REL\n");
66                 sigd_enq2(NULL, as_reject, vcc, NULL, NULL, &vcc->qos, 0);
67                 dev_kfree_skb(skb);
68         }
69         clear_bit(ATM_VF_REGIS, &vcc->flags);
70         /* ... may retry later */
71 }
72
73 static int svc_release(struct socket *sock)
74 {
75         struct sock *sk = sock->sk;
76         struct atm_vcc *vcc;
77
78         if (sk) {
79                 vcc = ATM_SD(sock);
80                 pr_debug("%p\n", vcc);
81                 clear_bit(ATM_VF_READY, &vcc->flags);
82                 /*
83                  * VCC pointer is used as a reference,
84                  * so we must not free it (thereby subjecting it to re-use)
85                  * before all pending connections are closed
86                  */
87                 svc_disconnect(vcc);
88                 vcc_release(sock);
89         }
90         return 0;
91 }
92
93 static int svc_bind(struct socket *sock, struct sockaddr *sockaddr,
94                     int sockaddr_len)
95 {
96         DEFINE_WAIT(wait);
97         struct sock *sk = sock->sk;
98         struct sockaddr_atmsvc *addr;
99         struct atm_vcc *vcc;
100         int error;
101
102         if (sockaddr_len != sizeof(struct sockaddr_atmsvc))
103                 return -EINVAL;
104         lock_sock(sk);
105         if (sock->state == SS_CONNECTED) {
106                 error = -EISCONN;
107                 goto out;
108         }
109         if (sock->state != SS_UNCONNECTED) {
110                 error = -EINVAL;
111                 goto out;
112         }
113         vcc = ATM_SD(sock);
114         addr = (struct sockaddr_atmsvc *) sockaddr;
115         if (addr->sas_family != AF_ATMSVC) {
116                 error = -EAFNOSUPPORT;
117                 goto out;
118         }
119         clear_bit(ATM_VF_BOUND, &vcc->flags);
120             /* failing rebind will kill old binding */
121         /* @@@ check memory (de)allocation on rebind */
122         if (!test_bit(ATM_VF_HASQOS, &vcc->flags)) {
123                 error = -EBADFD;
124                 goto out;
125         }
126         vcc->local = *addr;
127         set_bit(ATM_VF_WAITING, &vcc->flags);
128         prepare_to_wait(sk_sleep(sk), &wait, TASK_UNINTERRUPTIBLE);
129         sigd_enq(vcc, as_bind, NULL, NULL, &vcc->local);
130         while (test_bit(ATM_VF_WAITING, &vcc->flags) && sigd) {
131                 schedule();
132                 prepare_to_wait(sk_sleep(sk), &wait, TASK_UNINTERRUPTIBLE);
133         }
134         finish_wait(sk_sleep(sk), &wait);
135         clear_bit(ATM_VF_REGIS, &vcc->flags); /* doesn't count */
136         if (!sigd) {
137                 error = -EUNATCH;
138                 goto out;
139         }
140         if (!sk->sk_err)
141                 set_bit(ATM_VF_BOUND, &vcc->flags);
142         error = -sk->sk_err;
143 out:
144         release_sock(sk);
145         return error;
146 }
147
148 static int svc_connect(struct socket *sock, struct sockaddr *sockaddr,
149                        int sockaddr_len, int flags)
150 {
151         DEFINE_WAIT(wait);
152         struct sock *sk = sock->sk;
153         struct sockaddr_atmsvc *addr;
154         struct atm_vcc *vcc = ATM_SD(sock);
155         int error;
156
157         pr_debug("%p\n", vcc);
158         lock_sock(sk);
159         if (sockaddr_len != sizeof(struct sockaddr_atmsvc)) {
160                 error = -EINVAL;
161                 goto out;
162         }
163
164         switch (sock->state) {
165         default:
166                 error = -EINVAL;
167                 goto out;
168         case SS_CONNECTED:
169                 error = -EISCONN;
170                 goto out;
171         case SS_CONNECTING:
172                 if (test_bit(ATM_VF_WAITING, &vcc->flags)) {
173                         error = -EALREADY;
174                         goto out;
175                 }
176                 sock->state = SS_UNCONNECTED;
177                 if (sk->sk_err) {
178                         error = -sk->sk_err;
179                         goto out;
180                 }
181                 break;
182         case SS_UNCONNECTED:
183                 addr = (struct sockaddr_atmsvc *) sockaddr;
184                 if (addr->sas_family != AF_ATMSVC) {
185                         error = -EAFNOSUPPORT;
186                         goto out;
187                 }
188                 if (!test_bit(ATM_VF_HASQOS, &vcc->flags)) {
189                         error = -EBADFD;
190                         goto out;
191                 }
192                 if (vcc->qos.txtp.traffic_class == ATM_ANYCLASS ||
193                     vcc->qos.rxtp.traffic_class == ATM_ANYCLASS) {
194                         error = -EINVAL;
195                         goto out;
196                 }
197                 if (!vcc->qos.txtp.traffic_class &&
198                     !vcc->qos.rxtp.traffic_class) {
199                         error = -EINVAL;
200                         goto out;
201                 }
202                 vcc->remote = *addr;
203                 set_bit(ATM_VF_WAITING, &vcc->flags);
204                 prepare_to_wait(sk_sleep(sk), &wait, TASK_INTERRUPTIBLE);
205                 sigd_enq(vcc, as_connect, NULL, NULL, &vcc->remote);
206                 if (flags & O_NONBLOCK) {
207                         finish_wait(sk_sleep(sk), &wait);
208                         sock->state = SS_CONNECTING;
209                         error = -EINPROGRESS;
210                         goto out;
211                 }
212                 error = 0;
213                 while (test_bit(ATM_VF_WAITING, &vcc->flags) && sigd) {
214                         schedule();
215                         if (!signal_pending(current)) {
216                                 prepare_to_wait(sk_sleep(sk), &wait,
217                                                 TASK_INTERRUPTIBLE);
218                                 continue;
219                         }
220                         pr_debug("*ABORT*\n");
221                         /*
222                          * This is tricky:
223                          *   Kernel ---close--> Demon
224                          *   Kernel <--close--- Demon
225                          * or
226                          *   Kernel ---close--> Demon
227                          *   Kernel <--error--- Demon
228                          * or
229                          *   Kernel ---close--> Demon
230                          *   Kernel <--okay---- Demon
231                          *   Kernel <--close--- Demon
232                          */
233                         sigd_enq(vcc, as_close, NULL, NULL, NULL);
234                         while (test_bit(ATM_VF_WAITING, &vcc->flags) && sigd) {
235                                 prepare_to_wait(sk_sleep(sk), &wait,
236                                                 TASK_INTERRUPTIBLE);
237                                 schedule();
238                         }
239                         if (!sk->sk_err)
240                                 while (!test_bit(ATM_VF_RELEASED, &vcc->flags) &&
241                                        sigd) {
242                                         prepare_to_wait(sk_sleep(sk), &wait,
243                                                         TASK_INTERRUPTIBLE);
244                                         schedule();
245                                 }
246                         clear_bit(ATM_VF_REGIS, &vcc->flags);
247                         clear_bit(ATM_VF_RELEASED, &vcc->flags);
248                         clear_bit(ATM_VF_CLOSE, &vcc->flags);
249                             /* we're gone now but may connect later */
250                         error = -EINTR;
251                         break;
252                 }
253                 finish_wait(sk_sleep(sk), &wait);
254                 if (error)
255                         goto out;
256                 if (!sigd) {
257                         error = -EUNATCH;
258                         goto out;
259                 }
260                 if (sk->sk_err) {
261                         error = -sk->sk_err;
262                         goto out;
263                 }
264         }
265 /*
266  * Not supported yet
267  *
268  * #ifndef CONFIG_SINGLE_SIGITF
269  */
270         vcc->qos.txtp.max_pcr = SELECT_TOP_PCR(vcc->qos.txtp);
271         vcc->qos.txtp.pcr = 0;
272         vcc->qos.txtp.min_pcr = 0;
273 /*
274  * #endif
275  */
276         error = vcc_connect(sock, vcc->itf, vcc->vpi, vcc->vci);
277         if (!error)
278                 sock->state = SS_CONNECTED;
279         else
280                 (void)svc_disconnect(vcc);
281 out:
282         release_sock(sk);
283         return error;
284 }
285
286 static int svc_listen(struct socket *sock, int backlog)
287 {
288         DEFINE_WAIT(wait);
289         struct sock *sk = sock->sk;
290         struct atm_vcc *vcc = ATM_SD(sock);
291         int error;
292
293         pr_debug("%p\n", vcc);
294         lock_sock(sk);
295         /* let server handle listen on unbound sockets */
296         if (test_bit(ATM_VF_SESSION, &vcc->flags)) {
297                 error = -EINVAL;
298                 goto out;
299         }
300         if (test_bit(ATM_VF_LISTEN, &vcc->flags)) {
301                 error = -EADDRINUSE;
302                 goto out;
303         }
304         set_bit(ATM_VF_WAITING, &vcc->flags);
305         prepare_to_wait(sk_sleep(sk), &wait, TASK_UNINTERRUPTIBLE);
306         sigd_enq(vcc, as_listen, NULL, NULL, &vcc->local);
307         while (test_bit(ATM_VF_WAITING, &vcc->flags) && sigd) {
308                 schedule();
309                 prepare_to_wait(sk_sleep(sk), &wait, TASK_UNINTERRUPTIBLE);
310         }
311         finish_wait(sk_sleep(sk), &wait);
312         if (!sigd) {
313                 error = -EUNATCH;
314                 goto out;
315         }
316         set_bit(ATM_VF_LISTEN, &vcc->flags);
317         vcc_insert_socket(sk);
318         sk->sk_max_ack_backlog = backlog > 0 ? backlog : ATM_BACKLOG_DEFAULT;
319         error = -sk->sk_err;
320 out:
321         release_sock(sk);
322         return error;
323 }
324
325 static int svc_accept(struct socket *sock, struct socket *newsock, int flags)
326 {
327         struct sock *sk = sock->sk;
328         struct sk_buff *skb;
329         struct atmsvc_msg *msg;
330         struct atm_vcc *old_vcc = ATM_SD(sock);
331         struct atm_vcc *new_vcc;
332         int error;
333
334         lock_sock(sk);
335
336         error = svc_create(sock_net(sk), newsock, 0, 0);
337         if (error)
338                 goto out;
339
340         new_vcc = ATM_SD(newsock);
341
342         pr_debug("%p -> %p\n", old_vcc, new_vcc);
343         while (1) {
344                 DEFINE_WAIT(wait);
345
346                 prepare_to_wait(sk_sleep(sk), &wait, TASK_INTERRUPTIBLE);
347                 while (!(skb = skb_dequeue(&sk->sk_receive_queue)) &&
348                        sigd) {
349                         if (test_bit(ATM_VF_RELEASED, &old_vcc->flags))
350                                 break;
351                         if (test_bit(ATM_VF_CLOSE, &old_vcc->flags)) {
352                                 error = -sk->sk_err;
353                                 break;
354                         }
355                         if (flags & O_NONBLOCK) {
356                                 error = -EAGAIN;
357                                 break;
358                         }
359                         release_sock(sk);
360                         schedule();
361                         lock_sock(sk);
362                         if (signal_pending(current)) {
363                                 error = -ERESTARTSYS;
364                                 break;
365                         }
366                         prepare_to_wait(sk_sleep(sk), &wait,
367                                         TASK_INTERRUPTIBLE);
368                 }
369                 finish_wait(sk_sleep(sk), &wait);
370                 if (error)
371                         goto out;
372                 if (!skb) {
373                         error = -EUNATCH;
374                         goto out;
375                 }
376                 msg = (struct atmsvc_msg *)skb->data;
377                 new_vcc->qos = msg->qos;
378                 set_bit(ATM_VF_HASQOS, &new_vcc->flags);
379                 new_vcc->remote = msg->svc;
380                 new_vcc->local = msg->local;
381                 new_vcc->sap = msg->sap;
382                 error = vcc_connect(newsock, msg->pvc.sap_addr.itf,
383                                     msg->pvc.sap_addr.vpi,
384                                     msg->pvc.sap_addr.vci);
385                 dev_kfree_skb(skb);
386                 sk->sk_ack_backlog--;
387                 if (error) {
388                         sigd_enq2(NULL, as_reject, old_vcc, NULL, NULL,
389                                   &old_vcc->qos, error);
390                         error = error == -EAGAIN ? -EBUSY : error;
391                         goto out;
392                 }
393                 /* wait should be short, so we ignore the non-blocking flag */
394                 set_bit(ATM_VF_WAITING, &new_vcc->flags);
395                 prepare_to_wait(sk_sleep(sk_atm(new_vcc)), &wait,
396                                 TASK_UNINTERRUPTIBLE);
397                 sigd_enq(new_vcc, as_accept, old_vcc, NULL, NULL);
398                 while (test_bit(ATM_VF_WAITING, &new_vcc->flags) && sigd) {
399                         release_sock(sk);
400                         schedule();
401                         lock_sock(sk);
402                         prepare_to_wait(sk_sleep(sk_atm(new_vcc)), &wait,
403                                         TASK_UNINTERRUPTIBLE);
404                 }
405                 finish_wait(sk_sleep(sk_atm(new_vcc)), &wait);
406                 if (!sigd) {
407                         error = -EUNATCH;
408                         goto out;
409                 }
410                 if (!sk_atm(new_vcc)->sk_err)
411                         break;
412                 if (sk_atm(new_vcc)->sk_err != ERESTARTSYS) {
413                         error = -sk_atm(new_vcc)->sk_err;
414                         goto out;
415                 }
416         }
417         newsock->state = SS_CONNECTED;
418 out:
419         release_sock(sk);
420         return error;
421 }
422
423 static int svc_getname(struct socket *sock, struct sockaddr *sockaddr,
424                        int *sockaddr_len, int peer)
425 {
426         struct sockaddr_atmsvc *addr;
427
428         *sockaddr_len = sizeof(struct sockaddr_atmsvc);
429         addr = (struct sockaddr_atmsvc *) sockaddr;
430         memcpy(addr, peer ? &ATM_SD(sock)->remote : &ATM_SD(sock)->local,
431                sizeof(struct sockaddr_atmsvc));
432         return 0;
433 }
434
435 int svc_change_qos(struct atm_vcc *vcc, struct atm_qos *qos)
436 {
437         struct sock *sk = sk_atm(vcc);
438         DEFINE_WAIT(wait);
439
440         set_bit(ATM_VF_WAITING, &vcc->flags);
441         prepare_to_wait(sk_sleep(sk), &wait, TASK_UNINTERRUPTIBLE);
442         sigd_enq2(vcc, as_modify, NULL, NULL, &vcc->local, qos, 0);
443         while (test_bit(ATM_VF_WAITING, &vcc->flags) &&
444                !test_bit(ATM_VF_RELEASED, &vcc->flags) && sigd) {
445                 schedule();
446                 prepare_to_wait(sk_sleep(sk), &wait, TASK_UNINTERRUPTIBLE);
447         }
448         finish_wait(sk_sleep(sk), &wait);
449         if (!sigd)
450                 return -EUNATCH;
451         return -sk->sk_err;
452 }
453
454 static int svc_setsockopt(struct socket *sock, int level, int optname,
455                           char __user *optval, unsigned int optlen)
456 {
457         struct sock *sk = sock->sk;
458         struct atm_vcc *vcc = ATM_SD(sock);
459         int value, error = 0;
460
461         lock_sock(sk);
462         switch (optname) {
463         case SO_ATMSAP:
464                 if (level != SOL_ATM || optlen != sizeof(struct atm_sap)) {
465                         error = -EINVAL;
466                         goto out;
467                 }
468                 if (copy_from_user(&vcc->sap, optval, optlen)) {
469                         error = -EFAULT;
470                         goto out;
471                 }
472                 set_bit(ATM_VF_HASSAP, &vcc->flags);
473                 break;
474         case SO_MULTIPOINT:
475                 if (level != SOL_ATM || optlen != sizeof(int)) {
476                         error = -EINVAL;
477                         goto out;
478                 }
479                 if (get_user(value, (int __user *)optval)) {
480                         error = -EFAULT;
481                         goto out;
482                 }
483                 if (value == 1)
484                         set_bit(ATM_VF_SESSION, &vcc->flags);
485                 else if (value == 0)
486                         clear_bit(ATM_VF_SESSION, &vcc->flags);
487                 else
488                         error = -EINVAL;
489                 break;
490         default:
491                 error = vcc_setsockopt(sock, level, optname, optval, optlen);
492         }
493
494 out:
495         release_sock(sk);
496         return error;
497 }
498
499 static int svc_getsockopt(struct socket *sock, int level, int optname,
500                           char __user *optval, int __user *optlen)
501 {
502         struct sock *sk = sock->sk;
503         int error = 0, len;
504
505         lock_sock(sk);
506         if (!__SO_LEVEL_MATCH(optname, level) || optname != SO_ATMSAP) {
507                 error = vcc_getsockopt(sock, level, optname, optval, optlen);
508                 goto out;
509         }
510         if (get_user(len, optlen)) {
511                 error = -EFAULT;
512                 goto out;
513         }
514         if (len != sizeof(struct atm_sap)) {
515                 error = -EINVAL;
516                 goto out;
517         }
518         if (copy_to_user(optval, &ATM_SD(sock)->sap, sizeof(struct atm_sap))) {
519                 error = -EFAULT;
520                 goto out;
521         }
522 out:
523         release_sock(sk);
524         return error;
525 }
526
527 static int svc_addparty(struct socket *sock, struct sockaddr *sockaddr,
528                         int sockaddr_len, int flags)
529 {
530         DEFINE_WAIT(wait);
531         struct sock *sk = sock->sk;
532         struct atm_vcc *vcc = ATM_SD(sock);
533         int error;
534
535         lock_sock(sk);
536         set_bit(ATM_VF_WAITING, &vcc->flags);
537         prepare_to_wait(sk_sleep(sk), &wait, TASK_INTERRUPTIBLE);
538         sigd_enq(vcc, as_addparty, NULL, NULL,
539                  (struct sockaddr_atmsvc *) sockaddr);
540         if (flags & O_NONBLOCK) {
541                 finish_wait(sk_sleep(sk), &wait);
542                 error = -EINPROGRESS;
543                 goto out;
544         }
545         pr_debug("added wait queue\n");
546         while (test_bit(ATM_VF_WAITING, &vcc->flags) && sigd) {
547                 schedule();
548                 prepare_to_wait(sk_sleep(sk), &wait, TASK_INTERRUPTIBLE);
549         }
550         finish_wait(sk_sleep(sk), &wait);
551         error = xchg(&sk->sk_err_soft, 0);
552 out:
553         release_sock(sk);
554         return error;
555 }
556
557 static int svc_dropparty(struct socket *sock, int ep_ref)
558 {
559         DEFINE_WAIT(wait);
560         struct sock *sk = sock->sk;
561         struct atm_vcc *vcc = ATM_SD(sock);
562         int error;
563
564         lock_sock(sk);
565         set_bit(ATM_VF_WAITING, &vcc->flags);
566         prepare_to_wait(sk_sleep(sk), &wait, TASK_INTERRUPTIBLE);
567         sigd_enq2(vcc, as_dropparty, NULL, NULL, NULL, NULL, ep_ref);
568         while (test_bit(ATM_VF_WAITING, &vcc->flags) && sigd) {
569                 schedule();
570                 prepare_to_wait(sk_sleep(sk), &wait, TASK_INTERRUPTIBLE);
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);
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 }