net/atm/svc.c

   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 #ifdef CONFIG_COMPAT
  32 /* It actually takes struct sockaddr_atmsvc, not struct atm_iobuf */
  33 #define COMPAT_ATM_ADDPARTY _IOW('a', ATMIOC_SPECIAL + 4, struct compat_atm_iobuf)
  34 #endif
  35
  36 static int svc_create(struct net *net, struct socket *sock, int protocol,
  37                       int kern);
  38
  39 /*
  40  * Note: since all this is still nicely synchronized with the signaling demon,
  41  *       there's no need to protect sleep loops with clis. If signaling is
  42  *       moved into the kernel, that would change.
  43  */
  44
  45
  46 static int svc_shutdown(struct socket *sock, int how)
  47 {
  48         return 0;
  49 }
  50
  51 static void svc_disconnect(struct atm_vcc *vcc)
  52 {
  53         DEFINE_WAIT(wait);
  54         struct sk_buff *skb;
  55         struct sock *sk = sk_atm(vcc);
  56
  57         pr_debug("%p\n", vcc);
  58         if (test_bit(ATM_VF_REGIS, &vcc->flags)) {
  59                 sigd_enq(vcc, as_close, NULL, NULL, NULL);
  60                 for (;;) {
  61                         prepare_to_wait(sk_sleep(sk), &wait, TASK_UNINTERRUPTIBLE);
  62                         if (test_bit(ATM_VF_RELEASED, &vcc->flags) || !sigd)
  63                                 break;
  64                         schedule();
  65                 }
  66                 finish_wait(sk_sleep(sk), &wait);
  67         }
  68         /* beware - socket is still in use by atmsigd until the last
  69            as_indicate has been answered */
  70         while ((skb = skb_dequeue(&sk->sk_receive_queue)) != NULL) {
  71                 atm_return(vcc, skb->truesize);
  72                 pr_debug("LISTEN REL\n");
  73                 sigd_enq2(NULL, as_reject, vcc, NULL, NULL, &vcc->qos, 0);
  74                 dev_kfree_skb(skb);
  75         }
  76         clear_bit(ATM_VF_REGIS, &vcc->flags);
  77         /* ... may retry later */
  78 }
  79
  80 static int svc_release(struct socket *sock)
  81 {
  82         struct sock *sk = sock->sk;
  83         struct atm_vcc *vcc;
  84
  85         if (sk) {
  86                 vcc = ATM_SD(sock);
  87                 pr_debug("%p\n", vcc);
  88                 clear_bit(ATM_VF_READY, &vcc->flags);
  89                 /*
  90                  * VCC pointer is used as a reference,
  91                  * so we must not free it (thereby subjecting it to re-use)
  92                  * before all pending connections are closed
  93                  */
  94                 svc_disconnect(vcc);
  95                 vcc_release(sock);
  96         }
  97         return 0;
  98 }
  99
 100 static int svc_bind(struct socket *sock, struct sockaddr *sockaddr,
 101                     int sockaddr_len)
 102 {
 103         DEFINE_WAIT(wait);
 104         struct sock *sk = sock->sk;
 105         struct sockaddr_atmsvc *addr;
 106         struct atm_vcc *vcc;
 107         int error;
 108
 109         if (sockaddr_len != sizeof(struct sockaddr_atmsvc))
 110                 return -EINVAL;
 111         lock_sock(sk);
 112         if (sock->state == SS_CONNECTED) {
 113                 error = -EISCONN;
 114                 goto out;
 115         }
 116         if (sock->state != SS_UNCONNECTED) {
 117                 error = -EINVAL;
 118                 goto out;
 119         }
 120         vcc = ATM_SD(sock);
 121         addr = (struct sockaddr_atmsvc *) sockaddr;
 122         if (addr->sas_family != AF_ATMSVC) {
 123                 error = -EAFNOSUPPORT;
 124                 goto out;
 125         }
 126         clear_bit(ATM_VF_BOUND, &vcc->flags);
 127             /* failing rebind will kill old binding */
 128         /* @@@ check memory (de)allocation on rebind */
 129         if (!test_bit(ATM_VF_HASQOS, &vcc->flags)) {
 130                 error = -EBADFD;
 131                 goto out;
 132         }
 133         vcc->local = *addr;
 134         set_bit(ATM_VF_WAITING, &vcc->flags);
 135         sigd_enq(vcc, as_bind, NULL, NULL, &vcc->local);
 136         for (;;) {
 137                 prepare_to_wait(sk_sleep(sk), &wait, TASK_UNINTERRUPTIBLE);
 138                 if (!test_bit(ATM_VF_WAITING, &vcc->flags) || !sigd)
 139                         break;
 140                 schedule();
 141         }
 142         finish_wait(sk_sleep(sk), &wait);
 143         clear_bit(ATM_VF_REGIS, &vcc->flags); /* doesn't count */
 144         if (!sigd) {
 145                 error = -EUNATCH;
 146                 goto out;
 147         }
 148         if (!sk->sk_err)
 149                 set_bit(ATM_VF_BOUND, &vcc->flags);
 150         error = -sk->sk_err;
 151 out:
 152         release_sock(sk);
 153         return error;
 154 }
 155
 156 static int svc_connect(struct socket *sock, struct sockaddr *sockaddr,
 157                        int sockaddr_len, int flags)
 158 {
 159         DEFINE_WAIT(wait);
 160         struct sock *sk = sock->sk;
 161         struct sockaddr_atmsvc *addr;
 162         struct atm_vcc *vcc = ATM_SD(sock);
 163         int error;
 164
 165         pr_debug("%p\n", vcc);
 166         lock_sock(sk);
 167         if (sockaddr_len != sizeof(struct sockaddr_atmsvc)) {
 168                 error = -EINVAL;
 169                 goto out;
 170         }
 171
 172         switch (sock->state) {
 173         default:
 174                 error = -EINVAL;
 175                 goto out;
 176         case SS_CONNECTED:
 177                 error = -EISCONN;
 178                 goto out;
 179         case SS_CONNECTING:
 180                 if (test_bit(ATM_VF_WAITING, &vcc->flags)) {
 181                         error = -EALREADY;
 182                         goto out;
 183                 }
 184                 sock->state = SS_UNCONNECTED;
 185                 if (sk->sk_err) {
 186                         error = -sk->sk_err;
 187                         goto out;
 188                 }
 189                 break;
 190         case SS_UNCONNECTED:
 191                 addr = (struct sockaddr_atmsvc *) sockaddr;
 192                 if (addr->sas_family != AF_ATMSVC) {
 193                         error = -EAFNOSUPPORT;
 194                         goto out;
 195                 }
 196                 if (!test_bit(ATM_VF_HASQOS, &vcc->flags)) {
 197                         error = -EBADFD;
 198                         goto out;
 199                 }
 200                 if (vcc->qos.txtp.traffic_class == ATM_ANYCLASS ||
 201                     vcc->qos.rxtp.traffic_class == ATM_ANYCLASS) {
 202                         error = -EINVAL;
 203                         goto out;
 204                 }
 205                 if (!vcc->qos.txtp.traffic_class &&
 206                     !vcc->qos.rxtp.traffic_class) {
 207                         error = -EINVAL;
 208                         goto out;
 209                 }
 210                 vcc->remote = *addr;
 211                 set_bit(ATM_VF_WAITING, &vcc->flags);
 212                 sigd_enq(vcc, as_connect, NULL, NULL, &vcc->remote);
 213                 if (flags & O_NONBLOCK) {
 214                         sock->state = SS_CONNECTING;
 215                         error = -EINPROGRESS;
 216                         goto out;
 217                 }
 218                 error = 0;
 219                 prepare_to_wait(sk_sleep(sk), &wait, TASK_INTERRUPTIBLE);
 220                 while (test_bit(ATM_VF_WAITING, &vcc->flags) && sigd) {
 221                         schedule();
 222                         if (!signal_pending(current)) {
 223                                 prepare_to_wait(sk_sleep(sk), &wait,
 224                                                 TASK_INTERRUPTIBLE);
 225                                 continue;
 226                         }
 227                         pr_debug("*ABORT*\n");
 228                         /*
 229                          * This is tricky:
 230                          *   Kernel ---close--> Demon
 231                          *   Kernel <--close--- Demon
 232                          * or
 233                          *   Kernel ---close--> Demon
 234                          *   Kernel <--error--- Demon
 235                          * or
 236                          *   Kernel ---close--> Demon
 237                          *   Kernel <--okay---- Demon
 238                          *   Kernel <--close--- Demon
 239                          */
 240                         sigd_enq(vcc, as_close, NULL, NULL, NULL);
 241                         while (test_bit(ATM_VF_WAITING, &vcc->flags) && sigd) {
 242                                 prepare_to_wait(sk_sleep(sk), &wait,
 243                                                 TASK_INTERRUPTIBLE);
 244                                 schedule();
 245                         }
 246                         if (!sk->sk_err)
 247                                 while (!test_bit(ATM_VF_RELEASED, &vcc->flags) &&
 248                                        sigd) {
 249                                         prepare_to_wait(sk_sleep(sk), &wait,
 250                                                         TASK_INTERRUPTIBLE);
 251                                         schedule();
 252                                 }
 253                         clear_bit(ATM_VF_REGIS, &vcc->flags);
 254                         clear_bit(ATM_VF_RELEASED, &vcc->flags);
 255                         clear_bit(ATM_VF_CLOSE, &vcc->flags);
 256                             /* we're gone now but may connect later */
 257                         error = -EINTR;
 258                         break;
 259                 }
 260                 finish_wait(sk_sleep(sk), &wait);
 261                 if (error)
 262                         goto out;
 263                 if (!sigd) {
 264                         error = -EUNATCH;
 265                         goto out;
 266                 }
 267                 if (sk->sk_err) {
 268                         error = -sk->sk_err;
 269                         goto out;
 270                 }
 271         }
 272
 273         vcc->qos.txtp.max_pcr = SELECT_TOP_PCR(vcc->qos.txtp);
 274         vcc->qos.txtp.pcr = 0;
 275         vcc->qos.txtp.min_pcr = 0;
 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         sigd_enq(vcc, as_listen, NULL, NULL, &vcc->local);
 307         for (;;) {
 308                 prepare_to_wait(sk_sleep(sk), &wait, TASK_UNINTERRUPTIBLE);
 309                 if (!test_bit(ATM_VF_WAITING, &vcc->flags) || !sigd)
 310                         break;
 311                 schedule();
 312         }
 313         finish_wait(sk_sleep(sk), &wait);
 314         if (!sigd) {
 315                 error = -EUNATCH;
 316                 goto out;
 317         }
 318         set_bit(ATM_VF_LISTEN, &vcc->flags);
 319         vcc_insert_socket(sk);
 320         sk->sk_max_ack_backlog = backlog > 0 ? backlog : ATM_BACKLOG_DEFAULT;
 321         error = -sk->sk_err;
 322 out:
 323         release_sock(sk);
 324         return error;
 325 }
 326
 327 static int svc_accept(struct socket *sock, struct socket *newsock,
 328                       struct proto_accept_arg *arg)
 329 {
 330         struct sock *sk = sock->sk;
 331         struct sk_buff *skb;
 332         struct atmsvc_msg *msg;
 333         struct atm_vcc *old_vcc = ATM_SD(sock);
 334         struct atm_vcc *new_vcc;
 335         int error;
 336
 337         lock_sock(sk);
 338
 339         error = svc_create(sock_net(sk), newsock, 0, arg->kern);
 340         if (error)
 341                 goto out;
 342
 343         new_vcc = ATM_SD(newsock);
 344
 345         pr_debug("%p -> %p\n", old_vcc, new_vcc);
 346         while (1) {
 347                 DEFINE_WAIT(wait);
 348
 349                 prepare_to_wait(sk_sleep(sk), &wait, TASK_INTERRUPTIBLE);
 350                 while (!(skb = skb_dequeue(&sk->sk_receive_queue)) &&
 351                        sigd) {
 352                         if (test_bit(ATM_VF_RELEASED, &old_vcc->flags))
 353                                 break;
 354                         if (test_bit(ATM_VF_CLOSE, &old_vcc->flags)) {
 355                                 error = -sk->sk_err;
 356                                 break;
 357                         }
 358                         if (arg->flags & O_NONBLOCK) {
 359                                 error = -EAGAIN;
 360                                 break;
 361                         }
 362                         release_sock(sk);
 363                         schedule();
 364                         lock_sock(sk);
 365                         if (signal_pending(current)) {
 366                                 error = -ERESTARTSYS;
 367                                 break;
 368                         }
 369                         prepare_to_wait(sk_sleep(sk), &wait,
 370                                         TASK_INTERRUPTIBLE);
 371                 }
 372                 finish_wait(sk_sleep(sk), &wait);
 373                 if (error)
 374                         goto out;
 375                 if (!skb) {
 376                         error = -EUNATCH;
 377                         goto out;
 378                 }
 379                 msg = (struct atmsvc_msg *)skb->data;
 380                 new_vcc->qos = msg->qos;
 381                 set_bit(ATM_VF_HASQOS, &new_vcc->flags);
 382                 new_vcc->remote = msg->svc;
 383                 new_vcc->local = msg->local;
 384                 new_vcc->sap = msg->sap;
 385                 error = vcc_connect(newsock, msg->pvc.sap_addr.itf,
 386                                     msg->pvc.sap_addr.vpi,
 387                                     msg->pvc.sap_addr.vci);
 388                 dev_kfree_skb(skb);
 389                 sk_acceptq_removed(sk);
 390                 if (error) {
 391                         sigd_enq2(NULL, as_reject, old_vcc, NULL, NULL,
 392                                   &old_vcc->qos, error);
 393                         error = error == -EAGAIN ? -EBUSY : error;
 394                         goto out;
 395                 }
 396                 /* wait should be short, so we ignore the non-blocking flag */
 397                 set_bit(ATM_VF_WAITING, &new_vcc->flags);
 398                 sigd_enq(new_vcc, as_accept, old_vcc, NULL, NULL);
 399                 for (;;) {
 400                         prepare_to_wait(sk_sleep(sk_atm(new_vcc)), &wait,
 401                                         TASK_UNINTERRUPTIBLE);
 402                         if (!test_bit(ATM_VF_WAITING, &new_vcc->flags) || !sigd)
 403                                 break;
 404                         release_sock(sk);
 405                         schedule();
 406                         lock_sock(sk);
 407                 }
 408                 finish_wait(sk_sleep(sk_atm(new_vcc)), &wait);
 409                 if (!sigd) {
 410                         error = -EUNATCH;
 411                         goto out;
 412                 }
 413                 if (!sk_atm(new_vcc)->sk_err)
 414                         break;
 415                 if (sk_atm(new_vcc)->sk_err != ERESTARTSYS) {
 416                         error = -sk_atm(new_vcc)->sk_err;
 417                         goto out;
 418                 }
 419         }
 420         newsock->state = SS_CONNECTED;
 421 out:
 422         release_sock(sk);
 423         return error;
 424 }
 425
 426 static int svc_getname(struct socket *sock, struct sockaddr *sockaddr,
 427                        int peer)
 428 {
 429         struct sockaddr_atmsvc *addr;
 430
 431         addr = (struct sockaddr_atmsvc *) sockaddr;
 432         memcpy(addr, peer ? &ATM_SD(sock)->remote : &ATM_SD(sock)->local,
 433                sizeof(struct sockaddr_atmsvc));
 434         return sizeof(struct sockaddr_atmsvc);
 435 }
 436
 437 int svc_change_qos(struct atm_vcc *vcc, struct atm_qos *qos)
 438 {
 439         struct sock *sk = sk_atm(vcc);
 440         DEFINE_WAIT(wait);
 441
 442         set_bit(ATM_VF_WAITING, &vcc->flags);
 443         sigd_enq2(vcc, as_modify, NULL, NULL, &vcc->local, qos, 0);
 444         for (;;) {
 445                 prepare_to_wait(sk_sleep(sk), &wait, TASK_UNINTERRUPTIBLE);
 446                 if (!test_bit(ATM_VF_WAITING, &vcc->flags) ||
 447                     test_bit(ATM_VF_RELEASED, &vcc->flags) || !sigd) {
 448                         break;
 449                 }
 450                 schedule();
 451         }
 452         finish_wait(sk_sleep(sk), &wait);
 453         if (!sigd)
 454                 return -EUNATCH;
 455         return -sk->sk_err;
 456 }
 457
 458 static int svc_setsockopt(struct socket *sock, int level, int optname,
 459                           sockptr_t optval, unsigned int optlen)
 460 {
 461         struct sock *sk = sock->sk;
 462         struct atm_vcc *vcc = ATM_SD(sock);
 463         int value, error = 0;
 464
 465         lock_sock(sk);
 466         switch (optname) {
 467         case SO_ATMSAP:
 468                 if (level != SOL_ATM || optlen != sizeof(struct atm_sap)) {
 469                         error = -EINVAL;
 470                         goto out;
 471                 }
 472                 if (copy_from_sockptr(&vcc->sap, optval, optlen)) {
 473                         error = -EFAULT;
 474                         goto out;
 475                 }
 476                 set_bit(ATM_VF_HASSAP, &vcc->flags);
 477                 break;
 478         case SO_MULTIPOINT:
 479                 if (level != SOL_ATM || optlen != sizeof(int)) {
 480                         error = -EINVAL;
 481                         goto out;
 482                 }
 483                 if (copy_from_sockptr(&value, optval, sizeof(int))) {
 484                         error = -EFAULT;
 485                         goto out;
 486                 }
 487                 if (value == 1)
 488                         set_bit(ATM_VF_SESSION, &vcc->flags);
 489                 else if (value == 0)
 490                         clear_bit(ATM_VF_SESSION, &vcc->flags);
 491                 else
 492                         error = -EINVAL;
 493                 break;
 494         default:
 495                 error = vcc_setsockopt(sock, level, optname, optval, optlen);
 496         }
 497
 498 out:
 499         release_sock(sk);
 500         return error;
 501 }
 502
 503 static int svc_getsockopt(struct socket *sock, int level, int optname,
 504                           char __user *optval, int __user *optlen)
 505 {
 506         struct sock *sk = sock->sk;
 507         int error = 0, len;
 508
 509         lock_sock(sk);
 510         if (!__SO_LEVEL_MATCH(optname, level) || optname != SO_ATMSAP) {
 511                 error = vcc_getsockopt(sock, level, optname, optval, optlen);
 512                 goto out;
 513         }
 514         if (get_user(len, optlen)) {
 515                 error = -EFAULT;
 516                 goto out;
 517         }
 518         if (len != sizeof(struct atm_sap)) {
 519                 error = -EINVAL;
 520                 goto out;
 521         }
 522         if (copy_to_user(optval, &ATM_SD(sock)->sap, sizeof(struct atm_sap))) {
 523                 error = -EFAULT;
 524                 goto out;
 525         }
 526 out:
 527         release_sock(sk);
 528         return error;
 529 }
 530
 531 static int svc_addparty(struct socket *sock, struct sockaddr *sockaddr,
 532                         int sockaddr_len, int flags)
 533 {
 534         DEFINE_WAIT(wait);
 535         struct sock *sk = sock->sk;
 536         struct atm_vcc *vcc = ATM_SD(sock);
 537         int error;
 538
 539         lock_sock(sk);
 540         set_bit(ATM_VF_WAITING, &vcc->flags);
 541         sigd_enq(vcc, as_addparty, NULL, NULL,
 542                  (struct sockaddr_atmsvc *) sockaddr);
 543         if (flags & O_NONBLOCK) {
 544                 error = -EINPROGRESS;
 545                 goto out;
 546         }
 547         pr_debug("added wait queue\n");
 548         for (;;) {
 549                 prepare_to_wait(sk_sleep(sk), &wait, TASK_INTERRUPTIBLE);
 550                 if (!test_bit(ATM_VF_WAITING, &vcc->flags) || !sigd)
 551                         break;
 552                 schedule();
 553         }
 554         finish_wait(sk_sleep(sk), &wait);
 555         error = -xchg(&sk->sk_err_soft, 0);
 556 out:
 557         release_sock(sk);
 558         return error;
 559 }
 560
 561 static int svc_dropparty(struct socket *sock, int ep_ref)
 562 {
 563         DEFINE_WAIT(wait);
 564         struct sock *sk = sock->sk;
 565         struct atm_vcc *vcc = ATM_SD(sock);
 566         int error;
 567
 568         lock_sock(sk);
 569         set_bit(ATM_VF_WAITING, &vcc->flags);
 570         sigd_enq2(vcc, as_dropparty, NULL, NULL, NULL, NULL, ep_ref);
 571         for (;;) {
 572                 prepare_to_wait(sk_sleep(sk), &wait, TASK_INTERRUPTIBLE);
 573                 if (!test_bit(ATM_VF_WAITING, &vcc->flags) || !sigd)
 574                         break;
 575                 schedule();
 576         }
 577         finish_wait(sk_sleep(sk), &wait);
 578         if (!sigd) {
 579                 error = -EUNATCH;
 580                 goto out;
 581         }
 582         error = -xchg(&sk->sk_err_soft, 0);
 583 out:
 584         release_sock(sk);
 585         return error;
 586 }
 587
 588 static int svc_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
 589 {
 590         int error, ep_ref;
 591         struct sockaddr_atmsvc sa;
 592         struct atm_vcc *vcc = ATM_SD(sock);
 593
 594         switch (cmd) {
 595         case ATM_ADDPARTY:
 596                 if (!test_bit(ATM_VF_SESSION, &vcc->flags))
 597                         return -EINVAL;
 598                 if (copy_from_user(&sa, (void __user *) arg, sizeof(sa)))
 599                         return -EFAULT;
 600                 error = svc_addparty(sock, (struct sockaddr *)&sa, sizeof(sa),
 601                                      0);
 602                 break;
 603         case ATM_DROPPARTY:
 604                 if (!test_bit(ATM_VF_SESSION, &vcc->flags))
 605                         return -EINVAL;
 606                 if (copy_from_user(&ep_ref, (void __user *) arg, sizeof(int)))
 607                         return -EFAULT;
 608                 error = svc_dropparty(sock, ep_ref);
 609                 break;
 610         default:
 611                 error = vcc_ioctl(sock, cmd, arg);
 612         }
 613
 614         return error;
 615 }
 616
 617 #ifdef CONFIG_COMPAT
 618 static int svc_compat_ioctl(struct socket *sock, unsigned int cmd,
 619                             unsigned long arg)
 620 {
 621         /* The definition of ATM_ADDPARTY uses the size of struct atm_iobuf.
 622            But actually it takes a struct sockaddr_atmsvc, which doesn't need
 623            compat handling. So all we have to do is fix up cmd... */
 624         if (cmd == COMPAT_ATM_ADDPARTY)
 625                 cmd = ATM_ADDPARTY;
 626
 627         if (cmd == ATM_ADDPARTY || cmd == ATM_DROPPARTY)
 628                 return svc_ioctl(sock, cmd, arg);
 629         else
 630                 return vcc_compat_ioctl(sock, cmd, arg);
 631 }
 632 #endif /* CONFIG_COMPAT */
 633
 634 static const struct proto_ops svc_proto_ops = {
 635         .family =       PF_ATMSVC,
 636         .owner =        THIS_MODULE,
 637
 638         .release =      svc_release,
 639         .bind =         svc_bind,
 640         .connect =      svc_connect,
 641         .socketpair =   sock_no_socketpair,
 642         .accept =       svc_accept,
 643         .getname =      svc_getname,
 644         .poll =         vcc_poll,
 645         .ioctl =        svc_ioctl,
 646 #ifdef CONFIG_COMPAT
 647         .compat_ioctl = svc_compat_ioctl,
 648 #endif
 649         .gettstamp =    sock_gettstamp,
 650         .listen =       svc_listen,
 651         .shutdown =     svc_shutdown,
 652         .setsockopt =   svc_setsockopt,
 653         .getsockopt =   svc_getsockopt,
 654         .sendmsg =      vcc_sendmsg,
 655         .recvmsg =      vcc_recvmsg,
 656         .mmap =         sock_no_mmap,
 657 };
 658
 659
 660 static int svc_create(struct net *net, struct socket *sock, int protocol,
 661                       int kern)
 662 {
 663         int error;
 664
 665         if (!net_eq(net, &init_net))
 666                 return -EAFNOSUPPORT;
 667
 668         sock->ops = &svc_proto_ops;
 669         error = vcc_create(net, sock, protocol, AF_ATMSVC, kern);
 670         if (error)
 671                 return error;
 672         ATM_SD(sock)->local.sas_family = AF_ATMSVC;
 673         ATM_SD(sock)->remote.sas_family = AF_ATMSVC;
 674         return 0;
 675 }
 676
 677 static const struct net_proto_family svc_family_ops = {
 678         .family = PF_ATMSVC,
 679         .create = svc_create,
 680         .owner = THIS_MODULE,
 681 };
 682
 683
 684 /*
 685  *      Initialize the ATM SVC protocol family
 686  */
 687
 688 int __init atmsvc_init(void)
 689 {
 690         return sock_register(&svc_family_ops);
 691 }
 692
 693 void atmsvc_exit(void)
 694 {
 695         sock_unregister(PF_ATMSVC);
 696 }