linux/net/atm/svc.c
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   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
  30static 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
  40static int svc_shutdown(struct socket *sock, int how)
  41{
  42        return 0;
  43}
  44
  45static 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
  74static 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
  94static 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;
 145out:
 146        release_sock(sk);
 147        return error;
 148}
 149
 150static 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);
 276out:
 277        release_sock(sk);
 278        return error;
 279}
 280
 281static 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;
 316out:
 317        release_sock(sk);
 318        return error;
 319}
 320
 321static 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;
 414out:
 415        release_sock(sk);
 416        return error;
 417}
 418
 419static 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
 431int 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
 452static 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
 492out:
 493        release_sock(sk);
 494        return error;
 495}
 496
 497static 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        }
 520out:
 521        release_sock(sk);
 522        return error;
 523}
 524
 525static 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);
 550out:
 551        release_sock(sk);
 552        return error;
 553}
 554
 555static 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);
 577out:
 578        release_sock(sk);
 579        return error;
 580}
 581
 582static 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
 612static 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
 628static 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
 654static 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);
 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
 671static 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
 682int __init atmsvc_init(void)
 683{
 684        return sock_register(&svc_family_ops);
 685}
 686
 687void atmsvc_exit(void)
 688{
 689        sock_unregister(PF_ATMSVC);
 690}
 691