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

Version: ~ [ linux-5.5-rc7 ] ~ [ linux-5.4.13 ] ~ [ linux-5.3.18 ] ~ [ linux-5.2.21 ] ~ [ linux-5.1.21 ] ~ [ linux-5.0.21 ] ~ [ linux-4.20.17 ] ~ [ linux-4.19.97 ] ~ [ linux-4.18.20 ] ~ [ linux-4.17.19 ] ~ [ linux-4.16.18 ] ~ [ linux-4.15.18 ] ~ [ linux-4.14.166 ] ~ [ linux-4.13.16 ] ~ [ linux-4.12.14 ] ~ [ linux-4.11.12 ] ~ [ linux-4.10.17 ] ~ [ linux-4.9.210 ] ~ [ linux-4.8.17 ] ~ [ linux-4.7.10 ] ~ [ linux-4.6.7 ] ~ [ linux-4.5.7 ] ~ [ linux-4.4.210 ] ~ [ 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-3.16.81 ] ~ [ 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 ] ~
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  1 // SPDX-License-Identifier: GPL-2.0
  2 /* net/atm/svc.c - ATM SVC sockets */
  3 
  4 /* Written 1995-2000 by Werner Almesberger, EPFL LRC/ICA */
  5 
  6 #define pr_fmt(fmt) KBUILD_MODNAME ":%s: " fmt, __func__
  7 
  8 #include <linux/string.h>
  9 #include <linux/net.h>          /* struct socket, struct proto_ops */
 10 #include <linux/errno.h>        /* error codes */
 11 #include <linux/kernel.h>       /* printk */
 12 #include <linux/skbuff.h>
 13 #include <linux/wait.h>
 14 #include <linux/sched/signal.h>
 15 #include <linux/fcntl.h>        /* O_NONBLOCK */
 16 #include <linux/init.h>
 17 #include <linux/atm.h>          /* ATM stuff */
 18 #include <linux/atmsap.h>
 19 #include <linux/atmsvc.h>
 20 #include <linux/atmdev.h>
 21 #include <linux/bitops.h>
 22 #include <net/sock.h>           /* for sock_no_* */
 23 #include <linux/uaccess.h>
 24 #include <linux/export.h>
 25 
 26 #include "resources.h"
 27 #include "common.h"             /* common for PVCs and SVCs */
 28 #include "signaling.h"
 29 #include "addr.h"
 30 
 31 static int svc_create(struct net *net, struct socket *sock, int protocol,
 32                       int kern);
 33 
 34 /*
 35  * Note: since all this is still nicely synchronized with the signaling demon,
 36  *       there's no need to protect sleep loops with clis. If signaling is
 37  *       moved into the kernel, that would change.
 38  */
 39 
 40 
 41 static int svc_shutdown(struct socket *sock, int how)
 42 {
 43         return 0;
 44 }
 45 
 46 static void svc_disconnect(struct atm_vcc *vcc)
 47 {
 48         DEFINE_WAIT(wait);
 49         struct sk_buff *skb;
 50         struct sock *sk = sk_atm(vcc);
 51 
 52         pr_debug("%p\n", vcc);
 53         if (test_bit(ATM_VF_REGIS, &vcc->flags)) {
 54                 sigd_enq(vcc, as_close, NULL, NULL, NULL);
 55                 for (;;) {
 56                         prepare_to_wait(sk_sleep(sk), &wait, TASK_UNINTERRUPTIBLE);
 57                         if (test_bit(ATM_VF_RELEASED, &vcc->flags) || !sigd)
 58                                 break;
 59                         schedule();
 60                 }
 61                 finish_wait(sk_sleep(sk), &wait);
 62         }
 63         /* beware - socket is still in use by atmsigd until the last
 64            as_indicate has been answered */
 65         while ((skb = skb_dequeue(&sk->sk_receive_queue)) != NULL) {
 66                 atm_return(vcc, skb->truesize);
 67                 pr_debug("LISTEN REL\n");
 68                 sigd_enq2(NULL, as_reject, vcc, NULL, NULL, &vcc->qos, 0);
 69                 dev_kfree_skb(skb);
 70         }
 71         clear_bit(ATM_VF_REGIS, &vcc->flags);
 72         /* ... may retry later */
 73 }
 74 
 75 static int svc_release(struct socket *sock)
 76 {
 77         struct sock *sk = sock->sk;
 78         struct atm_vcc *vcc;
 79 
 80         if (sk) {
 81                 vcc = ATM_SD(sock);
 82                 pr_debug("%p\n", vcc);
 83                 clear_bit(ATM_VF_READY, &vcc->flags);
 84                 /*
 85                  * VCC pointer is used as a reference,
 86                  * so we must not free it (thereby subjecting it to re-use)
 87                  * before all pending connections are closed
 88                  */
 89                 svc_disconnect(vcc);
 90                 vcc_release(sock);
 91         }
 92         return 0;
 93 }
 94 
 95 static int svc_bind(struct socket *sock, struct sockaddr *sockaddr,
 96                     int sockaddr_len)
 97 {
 98         DEFINE_WAIT(wait);
 99         struct sock *sk = sock->sk;
100         struct sockaddr_atmsvc *addr;
101         struct atm_vcc *vcc;
102         int error;
103 
104         if (sockaddr_len != sizeof(struct sockaddr_atmsvc))
105                 return -EINVAL;
106         lock_sock(sk);
107         if (sock->state == SS_CONNECTED) {
108                 error = -EISCONN;
109                 goto out;
110         }
111         if (sock->state != SS_UNCONNECTED) {
112                 error = -EINVAL;
113                 goto out;
114         }
115         vcc = ATM_SD(sock);
116         addr = (struct sockaddr_atmsvc *) sockaddr;
117         if (addr->sas_family != AF_ATMSVC) {
118                 error = -EAFNOSUPPORT;
119                 goto out;
120         }
121         clear_bit(ATM_VF_BOUND, &vcc->flags);
122             /* failing rebind will kill old binding */
123         /* @@@ check memory (de)allocation on rebind */
124         if (!test_bit(ATM_VF_HASQOS, &vcc->flags)) {
125                 error = -EBADFD;
126                 goto out;
127         }
128         vcc->local = *addr;
129         set_bit(ATM_VF_WAITING, &vcc->flags);
130         sigd_enq(vcc, as_bind, NULL, NULL, &vcc->local);
131         for (;;) {
132                 prepare_to_wait(sk_sleep(sk), &wait, TASK_UNINTERRUPTIBLE);
133                 if (!test_bit(ATM_VF_WAITING, &vcc->flags) || !sigd)
134                         break;
135                 schedule();
136         }
137         finish_wait(sk_sleep(sk), &wait);
138         clear_bit(ATM_VF_REGIS, &vcc->flags); /* doesn't count */
139         if (!sigd) {
140                 error = -EUNATCH;
141                 goto out;
142         }
143         if (!sk->sk_err)
144                 set_bit(ATM_VF_BOUND, &vcc->flags);
145         error = -sk->sk_err;
146 out:
147         release_sock(sk);
148         return error;
149 }
150 
151 static int svc_connect(struct socket *sock, struct sockaddr *sockaddr,
152                        int sockaddr_len, int flags)
153 {
154         DEFINE_WAIT(wait);
155         struct sock *sk = sock->sk;
156         struct sockaddr_atmsvc *addr;
157         struct atm_vcc *vcc = ATM_SD(sock);
158         int error;
159 
160         pr_debug("%p\n", vcc);
161         lock_sock(sk);
162         if (sockaddr_len != sizeof(struct sockaddr_atmsvc)) {
163                 error = -EINVAL;
164                 goto out;
165         }
166 
167         switch (sock->state) {
168         default:
169                 error = -EINVAL;
170                 goto out;
171         case SS_CONNECTED:
172                 error = -EISCONN;
173                 goto out;
174         case SS_CONNECTING:
175                 if (test_bit(ATM_VF_WAITING, &vcc->flags)) {
176                         error = -EALREADY;
177                         goto out;
178                 }
179                 sock->state = SS_UNCONNECTED;
180                 if (sk->sk_err) {
181                         error = -sk->sk_err;
182                         goto out;
183                 }
184                 break;
185         case SS_UNCONNECTED:
186                 addr = (struct sockaddr_atmsvc *) sockaddr;
187                 if (addr->sas_family != AF_ATMSVC) {
188                         error = -EAFNOSUPPORT;
189                         goto out;
190                 }
191                 if (!test_bit(ATM_VF_HASQOS, &vcc->flags)) {
192                         error = -EBADFD;
193                         goto out;
194                 }
195                 if (vcc->qos.txtp.traffic_class == ATM_ANYCLASS ||
196                     vcc->qos.rxtp.traffic_class == ATM_ANYCLASS) {
197                         error = -EINVAL;
198                         goto out;
199                 }
200                 if (!vcc->qos.txtp.traffic_class &&
201                     !vcc->qos.rxtp.traffic_class) {
202                         error = -EINVAL;
203                         goto out;
204                 }
205                 vcc->remote = *addr;
206                 set_bit(ATM_VF_WAITING, &vcc->flags);
207                 sigd_enq(vcc, as_connect, NULL, NULL, &vcc->remote);
208                 if (flags & O_NONBLOCK) {
209                         sock->state = SS_CONNECTING;
210                         error = -EINPROGRESS;
211                         goto out;
212                 }
213                 error = 0;
214                 prepare_to_wait(sk_sleep(sk), &wait, TASK_INTERRUPTIBLE);
215                 while (test_bit(ATM_VF_WAITING, &vcc->flags) && sigd) {
216                         schedule();
217                         if (!signal_pending(current)) {
218                                 prepare_to_wait(sk_sleep(sk), &wait,
219                                                 TASK_INTERRUPTIBLE);
220                                 continue;
221                         }
222                         pr_debug("*ABORT*\n");
223                         /*
224                          * This is tricky:
225                          *   Kernel ---close--> Demon
226                          *   Kernel <--close--- Demon
227                          * or
228                          *   Kernel ---close--> Demon
229                          *   Kernel <--error--- Demon
230                          * or
231                          *   Kernel ---close--> Demon
232                          *   Kernel <--okay---- Demon
233                          *   Kernel <--close--- Demon
234                          */
235                         sigd_enq(vcc, as_close, NULL, NULL, NULL);
236                         while (test_bit(ATM_VF_WAITING, &vcc->flags) && sigd) {
237                                 prepare_to_wait(sk_sleep(sk), &wait,
238                                                 TASK_INTERRUPTIBLE);
239                                 schedule();
240                         }
241                         if (!sk->sk_err)
242                                 while (!test_bit(ATM_VF_RELEASED, &vcc->flags) &&
243                                        sigd) {
244                                         prepare_to_wait(sk_sleep(sk), &wait,
245                                                         TASK_INTERRUPTIBLE);
246                                         schedule();
247                                 }
248                         clear_bit(ATM_VF_REGIS, &vcc->flags);
249                         clear_bit(ATM_VF_RELEASED, &vcc->flags);
250                         clear_bit(ATM_VF_CLOSE, &vcc->flags);
251                             /* we're gone now but may connect later */
252                         error = -EINTR;
253                         break;
254                 }
255                 finish_wait(sk_sleep(sk), &wait);
256                 if (error)
257                         goto out;
258                 if (!sigd) {
259                         error = -EUNATCH;
260                         goto out;
261                 }
262                 if (sk->sk_err) {
263                         error = -sk->sk_err;
264                         goto out;
265                 }
266         }
267 
268         vcc->qos.txtp.max_pcr = SELECT_TOP_PCR(vcc->qos.txtp);
269         vcc->qos.txtp.pcr = 0;
270         vcc->qos.txtp.min_pcr = 0;
271 
272         error = vcc_connect(sock, vcc->itf, vcc->vpi, vcc->vci);
273         if (!error)
274                 sock->state = SS_CONNECTED;
275         else
276                 (void)svc_disconnect(vcc);
277 out:
278         release_sock(sk);
279         return error;
280 }
281 
282 static int svc_listen(struct socket *sock, int backlog)
283 {
284         DEFINE_WAIT(wait);
285         struct sock *sk = sock->sk;
286         struct atm_vcc *vcc = ATM_SD(sock);
287         int error;
288 
289         pr_debug("%p\n", vcc);
290         lock_sock(sk);
291         /* let server handle listen on unbound sockets */
292         if (test_bit(ATM_VF_SESSION, &vcc->flags)) {
293                 error = -EINVAL;
294                 goto out;
295         }
296         if (test_bit(ATM_VF_LISTEN, &vcc->flags)) {
297                 error = -EADDRINUSE;
298                 goto out;
299         }
300         set_bit(ATM_VF_WAITING, &vcc->flags);
301         sigd_enq(vcc, as_listen, NULL, NULL, &vcc->local);
302         for (;;) {
303                 prepare_to_wait(sk_sleep(sk), &wait, TASK_UNINTERRUPTIBLE);
304                 if (!test_bit(ATM_VF_WAITING, &vcc->flags) || !sigd)
305                         break;
306                 schedule();
307         }
308         finish_wait(sk_sleep(sk), &wait);
309         if (!sigd) {
310                 error = -EUNATCH;
311                 goto out;
312         }
313         set_bit(ATM_VF_LISTEN, &vcc->flags);
314         vcc_insert_socket(sk);
315         sk->sk_max_ack_backlog = backlog > 0 ? backlog : ATM_BACKLOG_DEFAULT;
316         error = -sk->sk_err;
317 out:
318         release_sock(sk);
319         return error;
320 }
321 
322 static int svc_accept(struct socket *sock, struct socket *newsock, int flags,
323                       bool kern)
324 {
325         struct sock *sk = sock->sk;
326         struct sk_buff *skb;
327         struct atmsvc_msg *msg;
328         struct atm_vcc *old_vcc = ATM_SD(sock);
329         struct atm_vcc *new_vcc;
330         int error;
331 
332         lock_sock(sk);
333 
334         error = svc_create(sock_net(sk), newsock, 0, kern);
335         if (error)
336                 goto out;
337 
338         new_vcc = ATM_SD(newsock);
339 
340         pr_debug("%p -> %p\n", old_vcc, new_vcc);
341         while (1) {
342                 DEFINE_WAIT(wait);
343 
344                 prepare_to_wait(sk_sleep(sk), &wait, TASK_INTERRUPTIBLE);
345                 while (!(skb = skb_dequeue(&sk->sk_receive_queue)) &&
346                        sigd) {
347                         if (test_bit(ATM_VF_RELEASED, &old_vcc->flags))
348                                 break;
349                         if (test_bit(ATM_VF_CLOSE, &old_vcc->flags)) {
350                                 error = -sk->sk_err;
351                                 break;
352                         }
353                         if (flags & O_NONBLOCK) {
354                                 error = -EAGAIN;
355                                 break;
356                         }
357                         release_sock(sk);
358                         schedule();
359                         lock_sock(sk);
360                         if (signal_pending(current)) {
361                                 error = -ERESTARTSYS;
362                                 break;
363                         }
364                         prepare_to_wait(sk_sleep(sk), &wait,
365                                         TASK_INTERRUPTIBLE);
366                 }
367                 finish_wait(sk_sleep(sk), &wait);
368                 if (error)
369                         goto out;
370                 if (!skb) {
371                         error = -EUNATCH;
372                         goto out;
373                 }
374                 msg = (struct atmsvc_msg *)skb->data;
375                 new_vcc->qos = msg->qos;
376                 set_bit(ATM_VF_HASQOS, &new_vcc->flags);
377                 new_vcc->remote = msg->svc;
378                 new_vcc->local = msg->local;
379                 new_vcc->sap = msg->sap;
380                 error = vcc_connect(newsock, msg->pvc.sap_addr.itf,
381                                     msg->pvc.sap_addr.vpi,
382                                     msg->pvc.sap_addr.vci);
383                 dev_kfree_skb(skb);
384                 sk->sk_ack_backlog--;
385                 if (error) {
386                         sigd_enq2(NULL, as_reject, old_vcc, NULL, NULL,
387                                   &old_vcc->qos, error);
388                         error = error == -EAGAIN ? -EBUSY : error;
389                         goto out;
390                 }
391                 /* wait should be short, so we ignore the non-blocking flag */
392                 set_bit(ATM_VF_WAITING, &new_vcc->flags);
393                 sigd_enq(new_vcc, as_accept, old_vcc, NULL, NULL);
394                 for (;;) {
395                         prepare_to_wait(sk_sleep(sk_atm(new_vcc)), &wait,
396                                         TASK_UNINTERRUPTIBLE);
397                         if (!test_bit(ATM_VF_WAITING, &new_vcc->flags) || !sigd)
398                                 break;
399                         release_sock(sk);
400                         schedule();
401                         lock_sock(sk);
402                 }
403                 finish_wait(sk_sleep(sk_atm(new_vcc)), &wait);
404                 if (!sigd) {
405                         error = -EUNATCH;
406                         goto out;
407                 }
408                 if (!sk_atm(new_vcc)->sk_err)
409                         break;
410                 if (sk_atm(new_vcc)->sk_err != ERESTARTSYS) {
411                         error = -sk_atm(new_vcc)->sk_err;
412                         goto out;
413                 }
414         }
415         newsock->state = SS_CONNECTED;
416 out:
417         release_sock(sk);
418         return error;
419 }
420 
421 static int svc_getname(struct socket *sock, struct sockaddr *sockaddr,
422                        int peer)
423 {
424         struct sockaddr_atmsvc *addr;
425 
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 sizeof(struct sockaddr_atmsvc);
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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