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/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 {
 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
 332         error = svc_create(sock_net(sk), newsock, 0, 0);
 333         if (error)
 334                 goto out;
 335
 336         new_vcc = ATM_SD(newsock);
 337
 338         pr_debug("%p -> %p\n", old_vcc, new_vcc);
 339         while (1) {
 340                 DEFINE_WAIT(wait);
 341
 342                 prepare_to_wait(sk_sleep(sk), &wait, TASK_INTERRUPTIBLE);
 343                 while (!(skb = skb_dequeue(&sk->sk_receive_queue)) &&
 344                        sigd) {
 345                         if (test_bit(ATM_VF_RELEASED, &old_vcc->flags))
 346                                 break;
 347                         if (test_bit(ATM_VF_CLOSE, &old_vcc->flags)) {
 348                                 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                         }
 362                         prepare_to_wait(sk_sleep(sk), &wait,
 363                                         TASK_INTERRUPTIBLE);
 364                 }
 365                 finish_wait(sk_sleep(sk), &wait);
 366                 if (error)
 367                         goto out;
 368                 if (!skb) {
 369                         error = -EUNATCH;
 370                         goto out;
 371                 }
 372                 msg = (struct atmsvc_msg *)skb->data;
 373                 new_vcc->qos = msg->qos;
 374                 set_bit(ATM_VF_HASQOS, &new_vcc->flags);
 375                 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,
 379                                     msg->pvc.sap_addr.vpi,
 380                                     msg->pvc.sap_addr.vci);
 381                 dev_kfree_skb(skb);
 382                 sk->sk_ack_backlog--;
 383                 if (error) {
 384                         sigd_enq2(NULL, as_reject, old_vcc, NULL, NULL,
 385                                   &old_vcc->qos, error);
 386                         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);
 391                 sigd_enq(new_vcc, as_accept, old_vcc, NULL, NULL);
 392                 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;
 397                         release_sock(sk);
 398                         schedule();
 399                         lock_sock(sk);
 400                 }
 401                 finish_wait(sk_sleep(sk_atm(new_vcc)), &wait);
 402                 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;
 414 out:
 415         release_sock(sk);
 416         return error;
 417 }
 418
 419 static int svc_getname(struct socket *sock, struct sockaddr *sockaddr,
 420                        int *sockaddr_len, int peer)
 421 {
 422         struct sockaddr_atmsvc *addr;
 423
 424         *sockaddr_len = sizeof(struct sockaddr_atmsvc);
 425         addr = (struct sockaddr_atmsvc *) sockaddr;
 426         memcpy(addr, peer ? &ATM_SD(sock)->remote : &ATM_SD(sock)->local,
 427                sizeof(struct sockaddr_atmsvc));
 428         return 0;
 429 }
 430
 431 int svc_change_qos(struct atm_vcc *vcc, struct atm_qos *qos)
 432 {
 433         struct sock *sk = sk_atm(vcc);
 434         DEFINE_WAIT(wait);
 435
 436         set_bit(ATM_VF_WAITING, &vcc->flags);
 437         sigd_enq2(vcc, as_modify, NULL, NULL, &vcc->local, qos, 0);
 438         for (;;) {
 439                 prepare_to_wait(sk_sleep(sk), &wait, TASK_UNINTERRUPTIBLE);
 440                 if (!test_bit(ATM_VF_WAITING, &vcc->flags) ||
 441                     test_bit(ATM_VF_RELEASED, &vcc->flags) || !sigd) {
 442                         break;
 443                 }
 444                 schedule();
 445         }
 446         finish_wait(sk_sleep(sk), &wait);
 447         if (!sigd)
 448                 return -EUNATCH;
 449         return -sk->sk_err;
 450 }
 451
 452 static int svc_setsockopt(struct socket *sock, int level, int optname,
 453                           char __user *optval, unsigned int optlen)
 454 {
 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) {
 461         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);
 490         }
 491
 492 out:
 493         release_sock(sk);
 494         return error;
 495 }
 496
 497 static int svc_getsockopt(struct socket *sock, int level, int optname,
 498                           char __user *optval, int __user *optlen)
 499 {
 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         }
 520 out:
 521         release_sock(sk);
 522         return error;
 523 }
 524
 525 static 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);
 535         sigd_enq(vcc, as_addparty, NULL, NULL,
 536                  (struct sockaddr_atmsvc *) sockaddr);
 537         if (flags & O_NONBLOCK) {
 538                 error = -EINPROGRESS;
 539                 goto out;
 540         }
 541         pr_debug("added wait queue\n");
 542         for (;;) {
 543                 prepare_to_wait(sk_sleep(sk), &wait, TASK_INTERRUPTIBLE);
 544                 if (!test_bit(ATM_VF_WAITING, &vcc->flags) || !sigd)
 545                         break;
 546                 schedule();
 547         }
 548         finish_wait(sk_sleep(sk), &wait);
 549         error = -xchg(&sk->sk_err_soft, 0);
 550 out:
 551         release_sock(sk);
 552         return error;
 553 }
 554
 555 static 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);
 564         sigd_enq2(vcc, as_dropparty, NULL, NULL, NULL, NULL, ep_ref);
 565         for (;;) {
 566                 prepare_to_wait(sk_sleep(sk), &wait, TASK_INTERRUPTIBLE);
 567                 if (!test_bit(ATM_VF_WAITING, &vcc->flags) || !sigd)
 568                         break;
 569                 schedule();
 570         }
 571         finish_wait(sk_sleep(sk), &wait);
 572         if (!sigd) {
 573                 error = -EUNATCH;
 574                 goto out;
 575         }
 576         error = -xchg(&sk->sk_err_soft, 0);
 577 out:
 578         release_sock(sk);
 579         return error;
 580 }
 581
 582 static int svc_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
 583 {
 584         int error, ep_ref;
 585         struct sockaddr_atmsvc sa;
 586         struct atm_vcc *vcc = ATM_SD(sock);
 587
 588         switch (cmd) {
 589         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);
 606         }
 607
 608         return error;
 609 }
 610
 611 #ifdef CONFIG_COMPAT
 612 static int svc_compat_ioctl(struct socket *sock, unsigned int cmd,
 613                             unsigned long arg)
 614 {
 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
 628 static const struct proto_ops svc_proto_ops = {
 629         .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,
 640 #ifdef CONFIG_COMPAT
 641         .compat_ioctl = svc_compat_ioctl,
 642 #endif
 643         .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
 654 static int svc_create(struct net *net, struct socket *sock, int protocol,
 655                       int kern)
 656 {
 657         int error;
 658
 659         if (!net_eq(net, &init_net))
 660                 return -EAFNOSUPPORT;
 661
 662         sock->ops = &svc_proto_ops;
 663         error = vcc_create(net, sock, protocol, AF_ATMSVC, kern);
 664         if (error)
 665                 return error;
 666         ATM_SD(sock)->local.sas_family = AF_ATMSVC;
 667         ATM_SD(sock)->remote.sas_family = AF_ATMSVC;
 668         return 0;
 669 }
 670
 671 static const struct net_proto_family svc_family_ops = {
 672         .family = PF_ATMSVC,
 673         .create = svc_create,
 674         .owner = THIS_MODULE,
 675 };
 676
 677
 678 /*
 679  *      Initialize the ATM SVC protocol family
 680  */
 681
 682 int __init atmsvc_init(void)
 683 {
 684         return sock_register(&svc_family_ops);
 685 }
 686
 687 void atmsvc_exit(void)
 688 {
 689         sock_unregister(PF_ATMSVC);
 690 }