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 #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                 prepare_to_wait(sk_sleep(sk), &wait, TASK_UNINTERRUPTIBLE);
  54                 sigd_enq(vcc, as_close, NULL, NULL, NULL);
  55                 while (!test_bit(ATM_VF_RELEASED, &vcc->flags) && sigd) {
  56                         schedule();
  57                         prepare_to_wait(sk_sleep(sk), &wait,
  58                                         TASK_UNINTERRUPTIBLE);
  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         prepare_to_wait(sk_sleep(sk), &wait, TASK_UNINTERRUPTIBLE);
 130         sigd_enq(vcc, as_bind, NULL, NULL, &vcc->local);
 131         while (test_bit(ATM_VF_WAITING, &vcc->flags) && sigd) {
 132                 schedule();
 133                 prepare_to_wait(sk_sleep(sk), &wait, TASK_UNINTERRUPTIBLE);
 134         }
 135         finish_wait(sk_sleep(sk), &wait);
 136         clear_bit(ATM_VF_REGIS, &vcc->flags); /* doesn't count */
 137         if (!sigd) {
 138                 error = -EUNATCH;
 139                 goto out;
 140         }
 141         if (!sk->sk_err)
 142                 set_bit(ATM_VF_BOUND, &vcc->flags);
 143         error = -sk->sk_err;
 144 out:
 145         release_sock(sk);
 146         return error;
 147 }
 148
 149 static int svc_connect(struct socket *sock, struct sockaddr *sockaddr,
 150                        int sockaddr_len, int flags)
 151 {
 152         DEFINE_WAIT(wait);
 153         struct sock *sk = sock->sk;
 154         struct sockaddr_atmsvc *addr;
 155         struct atm_vcc *vcc = ATM_SD(sock);
 156         int error;
 157
 158         pr_debug("%p\n", vcc);
 159         lock_sock(sk);
 160         if (sockaddr_len != sizeof(struct sockaddr_atmsvc)) {
 161                 error = -EINVAL;
 162                 goto out;
 163         }
 164
 165         switch (sock->state) {
 166         default:
 167                 error = -EINVAL;
 168                 goto out;
 169         case SS_CONNECTED:
 170                 error = -EISCONN;
 171                 goto out;
 172         case SS_CONNECTING:
 173                 if (test_bit(ATM_VF_WAITING, &vcc->flags)) {
 174                         error = -EALREADY;
 175                         goto out;
 176                 }
 177                 sock->state = SS_UNCONNECTED;
 178                 if (sk->sk_err) {
 179                         error = -sk->sk_err;
 180                         goto out;
 181                 }
 182                 break;
 183         case SS_UNCONNECTED:
 184                 addr = (struct sockaddr_atmsvc *) sockaddr;
 185                 if (addr->sas_family != AF_ATMSVC) {
 186                         error = -EAFNOSUPPORT;
 187                         goto out;
 188                 }
 189                 if (!test_bit(ATM_VF_HASQOS, &vcc->flags)) {
 190                         error = -EBADFD;
 191                         goto out;
 192                 }
 193                 if (vcc->qos.txtp.traffic_class == ATM_ANYCLASS ||
 194                     vcc->qos.rxtp.traffic_class == ATM_ANYCLASS) {
 195                         error = -EINVAL;
 196                         goto out;
 197                 }
 198                 if (!vcc->qos.txtp.traffic_class &&
 199                     !vcc->qos.rxtp.traffic_class) {
 200                         error = -EINVAL;
 201                         goto out;
 202                 }
 203                 vcc->remote = *addr;
 204                 set_bit(ATM_VF_WAITING, &vcc->flags);
 205                 prepare_to_wait(sk_sleep(sk), &wait, TASK_INTERRUPTIBLE);
 206                 sigd_enq(vcc, as_connect, NULL, NULL, &vcc->remote);
 207                 if (flags & O_NONBLOCK) {
 208                         finish_wait(sk_sleep(sk), &wait);
 209                         sock->state = SS_CONNECTING;
 210                         error = -EINPROGRESS;
 211                         goto out;
 212                 }
 213                 error = 0;
 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  * Not supported yet
 268  *
 269  * #ifndef CONFIG_SINGLE_SIGITF
 270  */
 271         vcc->qos.txtp.max_pcr = SELECT_TOP_PCR(vcc->qos.txtp);
 272         vcc->qos.txtp.pcr = 0;
 273         vcc->qos.txtp.min_pcr = 0;
 274 /*
 275  * #endif
 276  */
 277         error = vcc_connect(sock, vcc->itf, vcc->vpi, vcc->vci);
 278         if (!error)
 279                 sock->state = SS_CONNECTED;
 280         else
 281                 (void)svc_disconnect(vcc);
 282 out:
 283         release_sock(sk);
 284         return error;
 285 }
 286
 287 static int svc_listen(struct socket *sock, int backlog)
 288 {
 289         DEFINE_WAIT(wait);
 290         struct sock *sk = sock->sk;
 291         struct atm_vcc *vcc = ATM_SD(sock);
 292         int error;
 293
 294         pr_debug("%p\n", vcc);
 295         lock_sock(sk);
 296         /* let server handle listen on unbound sockets */
 297         if (test_bit(ATM_VF_SESSION, &vcc->flags)) {
 298                 error = -EINVAL;
 299                 goto out;
 300         }
 301         if (test_bit(ATM_VF_LISTEN, &vcc->flags)) {
 302                 error = -EADDRINUSE;
 303                 goto out;
 304         }
 305         set_bit(ATM_VF_WAITING, &vcc->flags);
 306         prepare_to_wait(sk_sleep(sk), &wait, TASK_UNINTERRUPTIBLE);
 307         sigd_enq(vcc, as_listen, NULL, NULL, &vcc->local);
 308         while (test_bit(ATM_VF_WAITING, &vcc->flags) && sigd) {
 309                 schedule();
 310                 prepare_to_wait(sk_sleep(sk), &wait, TASK_UNINTERRUPTIBLE);
 311         }
 312         finish_wait(sk_sleep(sk), &wait);
 313         if (!sigd) {
 314                 error = -EUNATCH;
 315                 goto out;
 316         }
 317         set_bit(ATM_VF_LISTEN, &vcc->flags);
 318         vcc_insert_socket(sk);
 319         sk->sk_max_ack_backlog = backlog > 0 ? backlog : ATM_BACKLOG_DEFAULT;
 320         error = -sk->sk_err;
 321 out:
 322         release_sock(sk);
 323         return error;
 324 }
 325
 326 static int svc_accept(struct socket *sock, struct socket *newsock, int flags)
 327 {
 328         struct sock *sk = sock->sk;
 329         struct sk_buff *skb;
 330         struct atmsvc_msg *msg;
 331         struct atm_vcc *old_vcc = ATM_SD(sock);
 332         struct atm_vcc *new_vcc;
 333         int error;
 334
 335         lock_sock(sk);
 336
 337         error = svc_create(sock_net(sk), newsock, 0, 0);
 338         if (error)
 339                 goto out;
 340
 341         new_vcc = ATM_SD(newsock);
 342
 343         pr_debug("%p -> %p\n", old_vcc, new_vcc);
 344         while (1) {
 345                 DEFINE_WAIT(wait);
 346
 347                 prepare_to_wait(sk_sleep(sk), &wait, TASK_INTERRUPTIBLE);
 348                 while (!(skb = skb_dequeue(&sk->sk_receive_queue)) &&
 349                        sigd) {
 350                         if (test_bit(ATM_VF_RELEASED, &old_vcc->flags))
 351                                 break;
 352                         if (test_bit(ATM_VF_CLOSE, &old_vcc->flags)) {
 353                                 error = -sk->sk_err;
 354                                 break;
 355                         }
 356                         if (flags & O_NONBLOCK) {
 357                                 error = -EAGAIN;
 358                                 break;
 359                         }
 360                         release_sock(sk);
 361                         schedule();
 362                         lock_sock(sk);
 363                         if (signal_pending(current)) {
 364                                 error = -ERESTARTSYS;
 365                                 break;
 366                         }
 367                         prepare_to_wait(sk_sleep(sk), &wait,
 368                                         TASK_INTERRUPTIBLE);
 369                 }
 370                 finish_wait(sk_sleep(sk), &wait);
 371                 if (error)
 372                         goto out;
 373                 if (!skb) {
 374                         error = -EUNATCH;
 375                         goto out;
 376                 }
 377                 msg = (struct atmsvc_msg *)skb->data;
 378                 new_vcc->qos = msg->qos;
 379                 set_bit(ATM_VF_HASQOS, &new_vcc->flags);
 380                 new_vcc->remote = msg->svc;
 381                 new_vcc->local = msg->local;
 382                 new_vcc->sap = msg->sap;
 383                 error = vcc_connect(newsock, msg->pvc.sap_addr.itf,
 384                                     msg->pvc.sap_addr.vpi,
 385                                     msg->pvc.sap_addr.vci);
 386                 dev_kfree_skb(skb);
 387                 sk->sk_ack_backlog--;
 388                 if (error) {
 389                         sigd_enq2(NULL, as_reject, old_vcc, NULL, NULL,
 390                                   &old_vcc->qos, error);
 391                         error = error == -EAGAIN ? -EBUSY : error;
 392                         goto out;
 393                 }
 394                 /* wait should be short, so we ignore the non-blocking flag */
 395                 set_bit(ATM_VF_WAITING, &new_vcc->flags);
 396                 prepare_to_wait(sk_sleep(sk_atm(new_vcc)), &wait,
 397                                 TASK_UNINTERRUPTIBLE);
 398                 sigd_enq(new_vcc, as_accept, old_vcc, NULL, NULL);
 399                 while (test_bit(ATM_VF_WAITING, &new_vcc->flags) && sigd) {
 400                         release_sock(sk);
 401                         schedule();
 402                         lock_sock(sk);
 403                         prepare_to_wait(sk_sleep(sk_atm(new_vcc)), &wait,
 404                                         TASK_UNINTERRUPTIBLE);
 405                 }
 406                 finish_wait(sk_sleep(sk_atm(new_vcc)), &wait);
 407                 if (!sigd) {
 408                         error = -EUNATCH;
 409                         goto out;
 410                 }
 411                 if (!sk_atm(new_vcc)->sk_err)
 412                         break;
 413                 if (sk_atm(new_vcc)->sk_err != ERESTARTSYS) {
 414                         error = -sk_atm(new_vcc)->sk_err;
 415                         goto out;
 416                 }
 417         }
 418         newsock->state = SS_CONNECTED;
 419 out:
 420         release_sock(sk);
 421         return error;
 422 }
 423
 424 static int svc_getname(struct socket *sock, struct sockaddr *sockaddr,
 425                        int *sockaddr_len, int peer)
 426 {
 427         struct sockaddr_atmsvc *addr;
 428
 429         *sockaddr_len = sizeof(struct sockaddr_atmsvc);
 430         addr = (struct sockaddr_atmsvc *) sockaddr;
 431         memcpy(addr, peer ? &ATM_SD(sock)->remote : &ATM_SD(sock)->local,
 432                sizeof(struct sockaddr_atmsvc));
 433         return 0;
 434 }
 435
 436 int svc_change_qos(struct atm_vcc *vcc, struct atm_qos *qos)
 437 {
 438         struct sock *sk = sk_atm(vcc);
 439         DEFINE_WAIT(wait);
 440
 441         set_bit(ATM_VF_WAITING, &vcc->flags);
 442         prepare_to_wait(sk_sleep(sk), &wait, TASK_UNINTERRUPTIBLE);
 443         sigd_enq2(vcc, as_modify, NULL, NULL, &vcc->local, qos, 0);
 444         while (test_bit(ATM_VF_WAITING, &vcc->flags) &&
 445                !test_bit(ATM_VF_RELEASED, &vcc->flags) && sigd) {
 446                 schedule();
 447                 prepare_to_wait(sk_sleep(sk), &wait, TASK_UNINTERRUPTIBLE);
 448         }
 449         finish_wait(sk_sleep(sk), &wait);
 450         if (!sigd)
 451                 return -EUNATCH;
 452         return -sk->sk_err;
 453 }
 454
 455 static int svc_setsockopt(struct socket *sock, int level, int optname,
 456                           char __user *optval, unsigned int optlen)
 457 {
 458         struct sock *sk = sock->sk;
 459         struct atm_vcc *vcc = ATM_SD(sock);
 460         int value, error = 0;
 461
 462         lock_sock(sk);
 463         switch (optname) {
 464         case SO_ATMSAP:
 465                 if (level != SOL_ATM || optlen != sizeof(struct atm_sap)) {
 466                         error = -EINVAL;
 467                         goto out;
 468                 }
 469                 if (copy_from_user(&vcc->sap, optval, optlen)) {
 470                         error = -EFAULT;
 471                         goto out;
 472                 }
 473                 set_bit(ATM_VF_HASSAP, &vcc->flags);
 474                 break;
 475         case SO_MULTIPOINT:
 476                 if (level != SOL_ATM || optlen != sizeof(int)) {
 477                         error = -EINVAL;
 478                         goto out;
 479                 }
 480                 if (get_user(value, (int __user *)optval)) {
 481                         error = -EFAULT;
 482                         goto out;
 483                 }
 484                 if (value == 1)
 485                         set_bit(ATM_VF_SESSION, &vcc->flags);
 486                 else if (value == 0)
 487                         clear_bit(ATM_VF_SESSION, &vcc->flags);
 488                 else
 489                         error = -EINVAL;
 490                 break;
 491         default:
 492                 error = vcc_setsockopt(sock, level, optname, optval, optlen);
 493         }
 494
 495 out:
 496         release_sock(sk);
 497         return error;
 498 }
 499
 500 static int svc_getsockopt(struct socket *sock, int level, int optname,
 501                           char __user *optval, int __user *optlen)
 502 {
 503         struct sock *sk = sock->sk;
 504         int error = 0, len;
 505
 506         lock_sock(sk);
 507         if (!__SO_LEVEL_MATCH(optname, level) || optname != SO_ATMSAP) {
 508                 error = vcc_getsockopt(sock, level, optname, optval, optlen);
 509                 goto out;
 510         }
 511         if (get_user(len, optlen)) {
 512                 error = -EFAULT;
 513                 goto out;
 514         }
 515         if (len != sizeof(struct atm_sap)) {
 516                 error = -EINVAL;
 517                 goto out;
 518         }
 519         if (copy_to_user(optval, &ATM_SD(sock)->sap, sizeof(struct atm_sap))) {
 520                 error = -EFAULT;
 521                 goto out;
 522         }
 523 out:
 524         release_sock(sk);
 525         return error;
 526 }
 527
 528 static int svc_addparty(struct socket *sock, struct sockaddr *sockaddr,
 529                         int sockaddr_len, int flags)
 530 {
 531         DEFINE_WAIT(wait);
 532         struct sock *sk = sock->sk;
 533         struct atm_vcc *vcc = ATM_SD(sock);
 534         int error;
 535
 536         lock_sock(sk);
 537         set_bit(ATM_VF_WAITING, &vcc->flags);
 538         prepare_to_wait(sk_sleep(sk), &wait, TASK_INTERRUPTIBLE);
 539         sigd_enq(vcc, as_addparty, NULL, NULL,
 540                  (struct sockaddr_atmsvc *) sockaddr);
 541         if (flags & O_NONBLOCK) {
 542                 finish_wait(sk_sleep(sk), &wait);
 543                 error = -EINPROGRESS;
 544                 goto out;
 545         }
 546         pr_debug("added wait queue\n");
 547         while (test_bit(ATM_VF_WAITING, &vcc->flags) && sigd) {
 548                 schedule();
 549                 prepare_to_wait(sk_sleep(sk), &wait, TASK_INTERRUPTIBLE);
 550         }
 551         finish_wait(sk_sleep(sk), &wait);
 552         error = xchg(&sk->sk_err_soft, 0);
 553 out:
 554         release_sock(sk);
 555         return error;
 556 }
 557
 558 static int svc_dropparty(struct socket *sock, int ep_ref)
 559 {
 560         DEFINE_WAIT(wait);
 561         struct sock *sk = sock->sk;
 562         struct atm_vcc *vcc = ATM_SD(sock);
 563         int error;
 564
 565         lock_sock(sk);
 566         set_bit(ATM_VF_WAITING, &vcc->flags);
 567         prepare_to_wait(sk_sleep(sk), &wait, TASK_INTERRUPTIBLE);
 568         sigd_enq2(vcc, as_dropparty, NULL, NULL, NULL, NULL, ep_ref);
 569         while (test_bit(ATM_VF_WAITING, &vcc->flags) && sigd) {
 570                 schedule();
 571                 prepare_to_wait(sk_sleep(sk), &wait, TASK_INTERRUPTIBLE);
 572         }
 573         finish_wait(sk_sleep(sk), &wait);
 574         if (!sigd) {
 575                 error = -EUNATCH;
 576                 goto out;
 577         }
 578         error = xchg(&sk->sk_err_soft, 0);
 579 out:
 580         release_sock(sk);
 581         return error;
 582 }
 583
 584 static int svc_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
 585 {
 586         int error, ep_ref;
 587         struct sockaddr_atmsvc sa;
 588         struct atm_vcc *vcc = ATM_SD(sock);
 589
 590         switch (cmd) {
 591         case ATM_ADDPARTY:
 592                 if (!test_bit(ATM_VF_SESSION, &vcc->flags))
 593                         return -EINVAL;
 594                 if (copy_from_user(&sa, (void __user *) arg, sizeof(sa)))
 595                         return -EFAULT;
 596                 error = svc_addparty(sock, (struct sockaddr *)&sa, sizeof(sa),
 597                                      0);
 598                 break;
 599         case ATM_DROPPARTY:
 600                 if (!test_bit(ATM_VF_SESSION, &vcc->flags))
 601                         return -EINVAL;
 602                 if (copy_from_user(&ep_ref, (void __user *) arg, sizeof(int)))
 603                         return -EFAULT;
 604                 error = svc_dropparty(sock, ep_ref);
 605                 break;
 606         default:
 607                 error = vcc_ioctl(sock, cmd, arg);
 608         }
 609
 610         return error;
 611 }
 612
 613 #ifdef CONFIG_COMPAT
 614 static int svc_compat_ioctl(struct socket *sock, unsigned int cmd,
 615                             unsigned long arg)
 616 {
 617         /* The definition of ATM_ADDPARTY uses the size of struct atm_iobuf.
 618            But actually it takes a struct sockaddr_atmsvc, which doesn't need
 619            compat handling. So all we have to do is fix up cmd... */
 620         if (cmd == COMPAT_ATM_ADDPARTY)
 621                 cmd = ATM_ADDPARTY;
 622
 623         if (cmd == ATM_ADDPARTY || cmd == ATM_DROPPARTY)
 624                 return svc_ioctl(sock, cmd, arg);
 625         else
 626                 return vcc_compat_ioctl(sock, cmd, arg);
 627 }
 628 #endif /* CONFIG_COMPAT */
 629
 630 static const struct proto_ops svc_proto_ops = {
 631         .family =       PF_ATMSVC,
 632         .owner =        THIS_MODULE,
 633
 634         .release =      svc_release,
 635         .bind =         svc_bind,
 636         .connect =      svc_connect,
 637         .socketpair =   sock_no_socketpair,
 638         .accept =       svc_accept,
 639         .getname =      svc_getname,
 640         .poll =         vcc_poll,
 641         .ioctl =        svc_ioctl,
 642 #ifdef CONFIG_COMPAT
 643         .compat_ioctl = svc_compat_ioctl,
 644 #endif
 645         .listen =       svc_listen,
 646         .shutdown =     svc_shutdown,
 647         .setsockopt =   svc_setsockopt,
 648         .getsockopt =   svc_getsockopt,
 649         .sendmsg =      vcc_sendmsg,
 650         .recvmsg =      vcc_recvmsg,
 651         .mmap =         sock_no_mmap,
 652         .sendpage =     sock_no_sendpage,
 653 };
 654
 655
 656 static int svc_create(struct net *net, struct socket *sock, int protocol,
 657                       int kern)
 658 {
 659         int error;
 660
 661         if (!net_eq(net, &init_net))
 662                 return -EAFNOSUPPORT;
 663
 664         sock->ops = &svc_proto_ops;
 665         error = vcc_create(net, sock, protocol, AF_ATMSVC);
 666         if (error)
 667                 return error;
 668         ATM_SD(sock)->local.sas_family = AF_ATMSVC;
 669         ATM_SD(sock)->remote.sas_family = AF_ATMSVC;
 670         return 0;
 671 }
 672
 673 static const struct net_proto_family svc_family_ops = {
 674         .family = PF_ATMSVC,
 675         .create = svc_create,
 676         .owner = THIS_MODULE,
 677 };
 678
 679
 680 /*
 681  *      Initialize the ATM SVC protocol family
 682  */
 683
 684 int __init atmsvc_init(void)
 685 {
 686         return sock_register(&svc_family_ops);
 687 }
 688
 689 void atmsvc_exit(void)
 690 {
 691         sock_unregister(PF_ATMSVC);
 692 }