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TOMOYO Linux Cross Reference
Linux/net/atm/svc.c

Version: ~ [ linux-5.4-rc3 ] ~ [ linux-5.3.6 ] ~ [ linux-5.2.21 ] ~ [ linux-5.1.21 ] ~ [ linux-5.0.21 ] ~ [ linux-4.20.17 ] ~ [ linux-4.19.79 ] ~ [ linux-4.18.20 ] ~ [ linux-4.17.19 ] ~ [ linux-4.16.18 ] ~ [ linux-4.15.18 ] ~ [ linux-4.14.149 ] ~ [ linux-4.13.16 ] ~ [ linux-4.12.14 ] ~ [ linux-4.11.12 ] ~ [ linux-4.10.17 ] ~ [ linux-4.9.196 ] ~ [ linux-4.8.17 ] ~ [ linux-4.7.10 ] ~ [ linux-4.6.7 ] ~ [ linux-4.5.7 ] ~ [ linux-4.4.196 ] ~ [ linux-4.3.6 ] ~ [ linux-4.2.8 ] ~ [ linux-4.1.52 ] ~ [ linux-4.0.9 ] ~ [ linux-3.19.8 ] ~ [ linux-3.18.140 ] ~ [ linux-3.17.8 ] ~ [ linux-3.16.75 ] ~ [ linux-3.15.10 ] ~ [ linux-3.14.79 ] ~ [ linux-3.13.11 ] ~ [ linux-3.12.74 ] ~ [ linux-3.11.10 ] ~ [ linux-3.10.108 ] ~ [ linux-3.9.11 ] ~ [ linux-3.8.13 ] ~ [ linux-3.7.10 ] ~ [ linux-3.6.11 ] ~ [ linux-3.5.7 ] ~ [ linux-3.4.113 ] ~ [ linux-3.3.8 ] ~ [ linux-3.2.102 ] ~ [ linux-3.1.10 ] ~ [ linux-3.0.101 ] ~ [ linux-2.6.32.71 ] ~ [ linux-2.6.0 ] ~ [ linux-2.4.37.11 ] ~ [ unix-v6-master ] ~ [ ccs-tools-1.8.5 ] ~ [ policy-sample ] ~
Architecture: ~ [ i386 ] ~ [ alpha ] ~ [ m68k ] ~ [ mips ] ~ [ ppc ] ~ [ sparc ] ~ [ sparc64 ] ~

  1 /* net/atm/svc.c - ATM SVC sockets */
  2 
  3 /* Written 1995-2000 by Werner Almesberger, EPFL LRC/ICA */
  4 
  5 #define pr_fmt(fmt) KBUILD_MODNAME ":%s: " fmt, __func__
  6 
  7 #include <linux/string.h>
  8 #include <linux/net.h>          /* struct socket, struct proto_ops */
  9 #include <linux/errno.h>        /* error codes */
 10 #include <linux/kernel.h>       /* printk */
 11 #include <linux/skbuff.h>
 12 #include <linux/wait.h>
 13 #include <linux/sched/signal.h>
 14 #include <linux/fcntl.h>        /* O_NONBLOCK */
 15 #include <linux/init.h>
 16 #include <linux/atm.h>          /* ATM stuff */
 17 #include <linux/atmsap.h>
 18 #include <linux/atmsvc.h>
 19 #include <linux/atmdev.h>
 20 #include <linux/bitops.h>
 21 #include <net/sock.h>           /* for sock_no_* */
 22 #include <linux/uaccess.h>
 23 #include <linux/export.h>
 24 
 25 #include "resources.h"
 26 #include "common.h"             /* common for PVCs and SVCs */
 27 #include "signaling.h"
 28 #include "addr.h"
 29 
 30 static int svc_create(struct net *net, struct socket *sock, int protocol,
 31                       int kern);
 32 
 33 /*
 34  * Note: since all this is still nicely synchronized with the signaling demon,
 35  *       there's no need to protect sleep loops with clis. If signaling is
 36  *       moved into the kernel, that would change.
 37  */
 38 
 39 
 40 static int svc_shutdown(struct socket *sock, int how)
 41 {
 42         return 0;
 43 }
 44 
 45 static void svc_disconnect(struct atm_vcc *vcc)
 46 {
 47         DEFINE_WAIT(wait);
 48         struct sk_buff *skb;
 49         struct sock *sk = sk_atm(vcc);
 50 
 51         pr_debug("%p\n", vcc);
 52         if (test_bit(ATM_VF_REGIS, &vcc->flags)) {
 53                 sigd_enq(vcc, as_close, NULL, NULL, NULL);
 54                 for (;;) {
 55                         prepare_to_wait(sk_sleep(sk), &wait, TASK_UNINTERRUPTIBLE);
 56                         if (test_bit(ATM_VF_RELEASED, &vcc->flags) || !sigd)
 57                                 break;
 58                         schedule();
 59                 }
 60                 finish_wait(sk_sleep(sk), &wait);
 61         }
 62         /* beware - socket is still in use by atmsigd until the last
 63            as_indicate has been answered */
 64         while ((skb = skb_dequeue(&sk->sk_receive_queue)) != NULL) {
 65                 atm_return(vcc, skb->truesize);
 66                 pr_debug("LISTEN REL\n");
 67                 sigd_enq2(NULL, as_reject, vcc, NULL, NULL, &vcc->qos, 0);
 68                 dev_kfree_skb(skb);
 69         }
 70         clear_bit(ATM_VF_REGIS, &vcc->flags);
 71         /* ... may retry later */
 72 }
 73 
 74 static int svc_release(struct socket *sock)
 75 {
 76         struct sock *sk = sock->sk;
 77         struct atm_vcc *vcc;
 78 
 79         if (sk) {
 80                 vcc = ATM_SD(sock);
 81                 pr_debug("%p\n", vcc);
 82                 clear_bit(ATM_VF_READY, &vcc->flags);
 83                 /*
 84                  * VCC pointer is used as a reference,
 85                  * so we must not free it (thereby subjecting it to re-use)
 86                  * before all pending connections are closed
 87                  */
 88                 svc_disconnect(vcc);
 89                 vcc_release(sock);
 90         }
 91         return 0;
 92 }
 93 
 94 static int svc_bind(struct socket *sock, struct sockaddr *sockaddr,
 95                     int sockaddr_len)
 96 {
 97         DEFINE_WAIT(wait);
 98         struct sock *sk = sock->sk;
 99         struct sockaddr_atmsvc *addr;
100         struct atm_vcc *vcc;
101         int error;
102 
103         if (sockaddr_len != sizeof(struct sockaddr_atmsvc))
104                 return -EINVAL;
105         lock_sock(sk);
106         if (sock->state == SS_CONNECTED) {
107                 error = -EISCONN;
108                 goto out;
109         }
110         if (sock->state != SS_UNCONNECTED) {
111                 error = -EINVAL;
112                 goto out;
113         }
114         vcc = ATM_SD(sock);
115         addr = (struct sockaddr_atmsvc *) sockaddr;
116         if (addr->sas_family != AF_ATMSVC) {
117                 error = -EAFNOSUPPORT;
118                 goto out;
119         }
120         clear_bit(ATM_VF_BOUND, &vcc->flags);
121             /* failing rebind will kill old binding */
122         /* @@@ check memory (de)allocation on rebind */
123         if (!test_bit(ATM_VF_HASQOS, &vcc->flags)) {
124                 error = -EBADFD;
125                 goto out;
126         }
127         vcc->local = *addr;
128         set_bit(ATM_VF_WAITING, &vcc->flags);
129         sigd_enq(vcc, as_bind, NULL, NULL, &vcc->local);
130         for (;;) {
131                 prepare_to_wait(sk_sleep(sk), &wait, TASK_UNINTERRUPTIBLE);
132                 if (!test_bit(ATM_VF_WAITING, &vcc->flags) || !sigd)
133                         break;
134                 schedule();
135         }
136         finish_wait(sk_sleep(sk), &wait);
137         clear_bit(ATM_VF_REGIS, &vcc->flags); /* doesn't count */
138         if (!sigd) {
139                 error = -EUNATCH;
140                 goto out;
141         }
142         if (!sk->sk_err)
143                 set_bit(ATM_VF_BOUND, &vcc->flags);
144         error = -sk->sk_err;
145 out:
146         release_sock(sk);
147         return error;
148 }
149 
150 static int svc_connect(struct socket *sock, struct sockaddr *sockaddr,
151                        int sockaddr_len, int flags)
152 {
153         DEFINE_WAIT(wait);
154         struct sock *sk = sock->sk;
155         struct sockaddr_atmsvc *addr;
156         struct atm_vcc *vcc = ATM_SD(sock);
157         int error;
158 
159         pr_debug("%p\n", vcc);
160         lock_sock(sk);
161         if (sockaddr_len != sizeof(struct sockaddr_atmsvc)) {
162                 error = -EINVAL;
163                 goto out;
164         }
165 
166         switch (sock->state) {
167         default:
168                 error = -EINVAL;
169                 goto out;
170         case SS_CONNECTED:
171                 error = -EISCONN;
172                 goto out;
173         case SS_CONNECTING:
174                 if (test_bit(ATM_VF_WAITING, &vcc->flags)) {
175                         error = -EALREADY;
176                         goto out;
177                 }
178                 sock->state = SS_UNCONNECTED;
179                 if (sk->sk_err) {
180                         error = -sk->sk_err;
181                         goto out;
182                 }
183                 break;
184         case SS_UNCONNECTED:
185                 addr = (struct sockaddr_atmsvc *) sockaddr;
186                 if (addr->sas_family != AF_ATMSVC) {
187                         error = -EAFNOSUPPORT;
188                         goto out;
189                 }
190                 if (!test_bit(ATM_VF_HASQOS, &vcc->flags)) {
191                         error = -EBADFD;
192                         goto out;
193                 }
194                 if (vcc->qos.txtp.traffic_class == ATM_ANYCLASS ||
195                     vcc->qos.rxtp.traffic_class == ATM_ANYCLASS) {
196                         error = -EINVAL;
197                         goto out;
198                 }
199                 if (!vcc->qos.txtp.traffic_class &&
200                     !vcc->qos.rxtp.traffic_class) {
201                         error = -EINVAL;
202                         goto out;
203                 }
204                 vcc->remote = *addr;
205                 set_bit(ATM_VF_WAITING, &vcc->flags);
206                 sigd_enq(vcc, as_connect, NULL, NULL, &vcc->remote);
207                 if (flags & O_NONBLOCK) {
208                         sock->state = SS_CONNECTING;
209                         error = -EINPROGRESS;
210                         goto out;
211                 }
212                 error = 0;
213                 prepare_to_wait(sk_sleep(sk), &wait, TASK_INTERRUPTIBLE);
214                 while (test_bit(ATM_VF_WAITING, &vcc->flags) && sigd) {
215                         schedule();
216                         if (!signal_pending(current)) {
217                                 prepare_to_wait(sk_sleep(sk), &wait,
218                                                 TASK_INTERRUPTIBLE);
219                                 continue;
220                         }
221                         pr_debug("*ABORT*\n");
222                         /*
223                          * This is tricky:
224                          *   Kernel ---close--> Demon
225                          *   Kernel <--close--- Demon
226                          * or
227                          *   Kernel ---close--> Demon
228                          *   Kernel <--error--- Demon
229                          * or
230                          *   Kernel ---close--> Demon
231                          *   Kernel <--okay---- Demon
232                          *   Kernel <--close--- Demon
233                          */
234                         sigd_enq(vcc, as_close, NULL, NULL, NULL);
235                         while (test_bit(ATM_VF_WAITING, &vcc->flags) && sigd) {
236                                 prepare_to_wait(sk_sleep(sk), &wait,
237                                                 TASK_INTERRUPTIBLE);
238                                 schedule();
239                         }
240                         if (!sk->sk_err)
241                                 while (!test_bit(ATM_VF_RELEASED, &vcc->flags) &&
242                                        sigd) {
243                                         prepare_to_wait(sk_sleep(sk), &wait,
244                                                         TASK_INTERRUPTIBLE);
245                                         schedule();
246                                 }
247                         clear_bit(ATM_VF_REGIS, &vcc->flags);
248                         clear_bit(ATM_VF_RELEASED, &vcc->flags);
249                         clear_bit(ATM_VF_CLOSE, &vcc->flags);
250                             /* we're gone now but may connect later */
251                         error = -EINTR;
252                         break;
253                 }
254                 finish_wait(sk_sleep(sk), &wait);
255                 if (error)
256                         goto out;
257                 if (!sigd) {
258                         error = -EUNATCH;
259                         goto out;
260                 }
261                 if (sk->sk_err) {
262                         error = -sk->sk_err;
263                         goto out;
264                 }
265         }
266 
267         vcc->qos.txtp.max_pcr = SELECT_TOP_PCR(vcc->qos.txtp);
268         vcc->qos.txtp.pcr = 0;
269         vcc->qos.txtp.min_pcr = 0;
270 
271         error = vcc_connect(sock, vcc->itf, vcc->vpi, vcc->vci);
272         if (!error)
273                 sock->state = SS_CONNECTED;
274         else
275                 (void)svc_disconnect(vcc);
276 out:
277         release_sock(sk);
278         return error;
279 }
280 
281 static int svc_listen(struct socket *sock, int backlog)
282 {
283         DEFINE_WAIT(wait);
284         struct sock *sk = sock->sk;
285         struct atm_vcc *vcc = ATM_SD(sock);
286         int error;
287 
288         pr_debug("%p\n", vcc);
289         lock_sock(sk);
290         /* let server handle listen on unbound sockets */
291         if (test_bit(ATM_VF_SESSION, &vcc->flags)) {
292                 error = -EINVAL;
293                 goto out;
294         }
295         if (test_bit(ATM_VF_LISTEN, &vcc->flags)) {
296                 error = -EADDRINUSE;
297                 goto out;
298         }
299         set_bit(ATM_VF_WAITING, &vcc->flags);
300         sigd_enq(vcc, as_listen, NULL, NULL, &vcc->local);
301         for (;;) {
302                 prepare_to_wait(sk_sleep(sk), &wait, TASK_UNINTERRUPTIBLE);
303                 if (!test_bit(ATM_VF_WAITING, &vcc->flags) || !sigd)
304                         break;
305                 schedule();
306         }
307         finish_wait(sk_sleep(sk), &wait);
308         if (!sigd) {
309                 error = -EUNATCH;
310                 goto out;
311         }
312         set_bit(ATM_VF_LISTEN, &vcc->flags);
313         vcc_insert_socket(sk);
314         sk->sk_max_ack_backlog = backlog > 0 ? backlog : ATM_BACKLOG_DEFAULT;
315         error = -sk->sk_err;
316 out:
317         release_sock(sk);
318         return error;
319 }
320 
321 static int svc_accept(struct socket *sock, struct socket *newsock, int flags,
322                       bool kern)
323 {
324         struct sock *sk = sock->sk;
325         struct sk_buff *skb;
326         struct atmsvc_msg *msg;
327         struct atm_vcc *old_vcc = ATM_SD(sock);
328         struct atm_vcc *new_vcc;
329         int error;
330 
331         lock_sock(sk);
332 
333         error = svc_create(sock_net(sk), newsock, 0, kern);
334         if (error)
335                 goto out;
336 
337         new_vcc = ATM_SD(newsock);
338 
339         pr_debug("%p -> %p\n", old_vcc, new_vcc);
340         while (1) {
341                 DEFINE_WAIT(wait);
342 
343                 prepare_to_wait(sk_sleep(sk), &wait, TASK_INTERRUPTIBLE);
344                 while (!(skb = skb_dequeue(&sk->sk_receive_queue)) &&
345                        sigd) {
346                         if (test_bit(ATM_VF_RELEASED, &old_vcc->flags))
347                                 break;
348                         if (test_bit(ATM_VF_CLOSE, &old_vcc->flags)) {
349                                 error = -sk->sk_err;
350                                 break;
351                         }
352                         if (flags & O_NONBLOCK) {
353                                 error = -EAGAIN;
354                                 break;
355                         }
356                         release_sock(sk);
357                         schedule();
358                         lock_sock(sk);
359                         if (signal_pending(current)) {
360                                 error = -ERESTARTSYS;
361                                 break;
362                         }
363                         prepare_to_wait(sk_sleep(sk), &wait,
364                                         TASK_INTERRUPTIBLE);
365                 }
366                 finish_wait(sk_sleep(sk), &wait);
367                 if (error)
368                         goto out;
369                 if (!skb) {
370                         error = -EUNATCH;
371                         goto out;
372                 }
373                 msg = (struct atmsvc_msg *)skb->data;
374                 new_vcc->qos = msg->qos;
375                 set_bit(ATM_VF_HASQOS, &new_vcc->flags);
376                 new_vcc->remote = msg->svc;
377                 new_vcc->local = msg->local;
378                 new_vcc->sap = msg->sap;
379                 error = vcc_connect(newsock, msg->pvc.sap_addr.itf,
380                                     msg->pvc.sap_addr.vpi,
381                                     msg->pvc.sap_addr.vci);
382                 dev_kfree_skb(skb);
383                 sk->sk_ack_backlog--;
384                 if (error) {
385                         sigd_enq2(NULL, as_reject, old_vcc, NULL, NULL,
386                                   &old_vcc->qos, error);
387                         error = error == -EAGAIN ? -EBUSY : error;
388                         goto out;
389                 }
390                 /* wait should be short, so we ignore the non-blocking flag */
391                 set_bit(ATM_VF_WAITING, &new_vcc->flags);
392                 sigd_enq(new_vcc, as_accept, old_vcc, NULL, NULL);
393                 for (;;) {
394                         prepare_to_wait(sk_sleep(sk_atm(new_vcc)), &wait,
395                                         TASK_UNINTERRUPTIBLE);
396                         if (!test_bit(ATM_VF_WAITING, &new_vcc->flags) || !sigd)
397                                 break;
398                         release_sock(sk);
399                         schedule();
400                         lock_sock(sk);
401                 }
402                 finish_wait(sk_sleep(sk_atm(new_vcc)), &wait);
403                 if (!sigd) {
404                         error = -EUNATCH;
405                         goto out;
406                 }
407                 if (!sk_atm(new_vcc)->sk_err)
408                         break;
409                 if (sk_atm(new_vcc)->sk_err != ERESTARTSYS) {
410                         error = -sk_atm(new_vcc)->sk_err;
411                         goto out;
412                 }
413         }
414         newsock->state = SS_CONNECTED;
415 out:
416         release_sock(sk);
417         return error;
418 }
419 
420 static int svc_getname(struct socket *sock, struct sockaddr *sockaddr,
421                        int *sockaddr_len, int peer)
422 {
423         struct sockaddr_atmsvc *addr;
424 
425         *sockaddr_len = sizeof(struct sockaddr_atmsvc);
426         addr = (struct sockaddr_atmsvc *) sockaddr;
427         memcpy(addr, peer ? &ATM_SD(sock)->remote : &ATM_SD(sock)->local,
428                sizeof(struct sockaddr_atmsvc));
429         return 0;
430 }
431 
432 int svc_change_qos(struct atm_vcc *vcc, struct atm_qos *qos)
433 {
434         struct sock *sk = sk_atm(vcc);
435         DEFINE_WAIT(wait);
436 
437         set_bit(ATM_VF_WAITING, &vcc->flags);
438         sigd_enq2(vcc, as_modify, NULL, NULL, &vcc->local, qos, 0);
439         for (;;) {
440                 prepare_to_wait(sk_sleep(sk), &wait, TASK_UNINTERRUPTIBLE);
441                 if (!test_bit(ATM_VF_WAITING, &vcc->flags) ||
442                     test_bit(ATM_VF_RELEASED, &vcc->flags) || !sigd) {
443                         break;
444                 }
445                 schedule();
446         }
447         finish_wait(sk_sleep(sk), &wait);
448         if (!sigd)
449                 return -EUNATCH;
450         return -sk->sk_err;
451 }
452 
453 static int svc_setsockopt(struct socket *sock, int level, int optname,
454                           char __user *optval, unsigned int optlen)
455 {
456         struct sock *sk = sock->sk;
457         struct atm_vcc *vcc = ATM_SD(sock);
458         int value, error = 0;
459 
460         lock_sock(sk);
461         switch (optname) {
462         case SO_ATMSAP:
463                 if (level != SOL_ATM || optlen != sizeof(struct atm_sap)) {
464                         error = -EINVAL;
465                         goto out;
466                 }
467                 if (copy_from_user(&vcc->sap, optval, optlen)) {
468                         error = -EFAULT;
469                         goto out;
470                 }
471                 set_bit(ATM_VF_HASSAP, &vcc->flags);
472                 break;
473         case SO_MULTIPOINT:
474                 if (level != SOL_ATM || optlen != sizeof(int)) {
475                         error = -EINVAL;
476                         goto out;
477                 }
478                 if (get_user(value, (int __user *)optval)) {
479                         error = -EFAULT;
480                         goto out;
481                 }
482                 if (value == 1)
483                         set_bit(ATM_VF_SESSION, &vcc->flags);
484                 else if (value == 0)
485                         clear_bit(ATM_VF_SESSION, &vcc->flags);
486                 else
487                         error = -EINVAL;
488                 break;
489         default:
490                 error = vcc_setsockopt(sock, level, optname, optval, optlen);
491         }
492 
493 out:
494         release_sock(sk);
495         return error;
496 }
497 
498 static int svc_getsockopt(struct socket *sock, int level, int optname,
499                           char __user *optval, int __user *optlen)
500 {
501         struct sock *sk = sock->sk;
502         int error = 0, len;
503 
504         lock_sock(sk);
505         if (!__SO_LEVEL_MATCH(optname, level) || optname != SO_ATMSAP) {
506                 error = vcc_getsockopt(sock, level, optname, optval, optlen);
507                 goto out;
508         }
509         if (get_user(len, optlen)) {
510                 error = -EFAULT;
511                 goto out;
512         }
513         if (len != sizeof(struct atm_sap)) {
514                 error = -EINVAL;
515                 goto out;
516         }
517         if (copy_to_user(optval, &ATM_SD(sock)->sap, sizeof(struct atm_sap))) {
518                 error = -EFAULT;
519                 goto out;
520         }
521 out:
522         release_sock(sk);
523         return error;
524 }
525 
526 static int svc_addparty(struct socket *sock, struct sockaddr *sockaddr,
527                         int sockaddr_len, int flags)
528 {
529         DEFINE_WAIT(wait);
530         struct sock *sk = sock->sk;
531         struct atm_vcc *vcc = ATM_SD(sock);
532         int error;
533 
534         lock_sock(sk);
535         set_bit(ATM_VF_WAITING, &vcc->flags);
536         sigd_enq(vcc, as_addparty, NULL, NULL,
537                  (struct sockaddr_atmsvc *) sockaddr);
538         if (flags & O_NONBLOCK) {
539                 error = -EINPROGRESS;
540                 goto out;
541         }
542         pr_debug("added wait queue\n");
543         for (;;) {
544                 prepare_to_wait(sk_sleep(sk), &wait, TASK_INTERRUPTIBLE);
545                 if (!test_bit(ATM_VF_WAITING, &vcc->flags) || !sigd)
546                         break;
547                 schedule();
548         }
549         finish_wait(sk_sleep(sk), &wait);
550         error = -xchg(&sk->sk_err_soft, 0);
551 out:
552         release_sock(sk);
553         return error;
554 }
555 
556 static int svc_dropparty(struct socket *sock, int ep_ref)
557 {
558         DEFINE_WAIT(wait);
559         struct sock *sk = sock->sk;
560         struct atm_vcc *vcc = ATM_SD(sock);
561         int error;
562 
563         lock_sock(sk);
564         set_bit(ATM_VF_WAITING, &vcc->flags);
565         sigd_enq2(vcc, as_dropparty, NULL, NULL, NULL, NULL, ep_ref);
566         for (;;) {
567                 prepare_to_wait(sk_sleep(sk), &wait, TASK_INTERRUPTIBLE);
568                 if (!test_bit(ATM_VF_WAITING, &vcc->flags) || !sigd)
569                         break;
570                 schedule();
571         }
572         finish_wait(sk_sleep(sk), &wait);
573         if (!sigd) {
574                 error = -EUNATCH;
575                 goto out;
576         }
577         error = -xchg(&sk->sk_err_soft, 0);
578 out:
579         release_sock(sk);
580         return error;
581 }
582 
583 static int svc_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
584 {
585         int error, ep_ref;
586         struct sockaddr_atmsvc sa;
587         struct atm_vcc *vcc = ATM_SD(sock);
588 
589         switch (cmd) {
590         case ATM_ADDPARTY:
591                 if (!test_bit(ATM_VF_SESSION, &vcc->flags))
592                         return -EINVAL;
593                 if (copy_from_user(&sa, (void __user *) arg, sizeof(sa)))
594                         return -EFAULT;
595                 error = svc_addparty(sock, (struct sockaddr *)&sa, sizeof(sa),
596                                      0);
597                 break;
598         case ATM_DROPPARTY:
599                 if (!test_bit(ATM_VF_SESSION, &vcc->flags))
600                         return -EINVAL;
601                 if (copy_from_user(&ep_ref, (void __user *) arg, sizeof(int)))
602                         return -EFAULT;
603                 error = svc_dropparty(sock, ep_ref);
604                 break;
605         default:
606                 error = vcc_ioctl(sock, cmd, arg);
607         }
608 
609         return error;
610 }
611 
612 #ifdef CONFIG_COMPAT
613 static int svc_compat_ioctl(struct socket *sock, unsigned int cmd,
614                             unsigned long arg)
615 {
616         /* The definition of ATM_ADDPARTY uses the size of struct atm_iobuf.
617            But actually it takes a struct sockaddr_atmsvc, which doesn't need
618            compat handling. So all we have to do is fix up cmd... */
619         if (cmd == COMPAT_ATM_ADDPARTY)
620                 cmd = ATM_ADDPARTY;
621 
622         if (cmd == ATM_ADDPARTY || cmd == ATM_DROPPARTY)
623                 return svc_ioctl(sock, cmd, arg);
624         else
625                 return vcc_compat_ioctl(sock, cmd, arg);
626 }
627 #endif /* CONFIG_COMPAT */
628 
629 static const struct proto_ops svc_proto_ops = {
630         .family =       PF_ATMSVC,
631         .owner =        THIS_MODULE,
632 
633         .release =      svc_release,
634         .bind =         svc_bind,
635         .connect =      svc_connect,
636         .socketpair =   sock_no_socketpair,
637         .accept =       svc_accept,
638         .getname =      svc_getname,
639         .poll =         vcc_poll,
640         .ioctl =        svc_ioctl,
641 #ifdef CONFIG_COMPAT
642         .compat_ioctl = svc_compat_ioctl,
643 #endif
644         .listen =       svc_listen,
645         .shutdown =     svc_shutdown,
646         .setsockopt =   svc_setsockopt,
647         .getsockopt =   svc_getsockopt,
648         .sendmsg =      vcc_sendmsg,
649         .recvmsg =      vcc_recvmsg,
650         .mmap =         sock_no_mmap,
651         .sendpage =     sock_no_sendpage,
652 };
653 
654 
655 static int svc_create(struct net *net, struct socket *sock, int protocol,
656                       int kern)
657 {
658         int error;
659 
660         if (!net_eq(net, &init_net))
661                 return -EAFNOSUPPORT;
662 
663         sock->ops = &svc_proto_ops;
664         error = vcc_create(net, sock, protocol, AF_ATMSVC, kern);
665         if (error)
666                 return error;
667         ATM_SD(sock)->local.sas_family = AF_ATMSVC;
668         ATM_SD(sock)->remote.sas_family = AF_ATMSVC;
669         return 0;
670 }
671 
672 static const struct net_proto_family svc_family_ops = {
673         .family = PF_ATMSVC,
674         .create = svc_create,
675         .owner = THIS_MODULE,
676 };
677 
678 
679 /*
680  *      Initialize the ATM SVC protocol family
681  */
682 
683 int __init atmsvc_init(void)
684 {
685         return sock_register(&svc_family_ops);
686 }
687 
688 void atmsvc_exit(void)
689 {
690         sock_unregister(PF_ATMSVC);
691 }
692 

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