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
   6#include <linux/string.h>
   7#include <linux/net.h>          /* struct socket, struct proto_ops */
   8#include <linux/errno.h>        /* error codes */
   9#include <linux/kernel.h>       /* printk */
  10#include <linux/skbuff.h>
  11#include <linux/wait.h>
  12#include <linux/sched.h>        /* jiffies and HZ */
  13#include <linux/fcntl.h>        /* O_NONBLOCK */
  14#include <linux/init.h>
  15#include <linux/atm.h>          /* ATM stuff */
  16#include <linux/atmsap.h>
  17#include <linux/atmsvc.h>
  18#include <linux/atmdev.h>
  19#include <linux/bitops.h>
  20#include <net/sock.h>           /* for sock_no_* */
  21#include <asm/uaccess.h>
  22
  23#include "resources.h"
  24#include "common.h"             /* common for PVCs and SVCs */
  25#include "signaling.h"
  26#include "addr.h"
  27
  28static int svc_create(struct net *net, struct socket *sock,int protocol);
  29
  30/*
  31 * Note: since all this is still nicely synchronized with the signaling demon,
  32 *       there's no need to protect sleep loops with clis. If signaling is
  33 *       moved into the kernel, that would change.
  34 */
  35
  36
  37static int svc_shutdown(struct socket *sock,int how)
  38{
  39        return 0;
  40}
  41
  42
  43static void svc_disconnect(struct atm_vcc *vcc)
  44{
  45        DEFINE_WAIT(wait);
  46        struct sk_buff *skb;
  47        struct sock *sk = sk_atm(vcc);
  48
  49        pr_debug("svc_disconnect %p\n",vcc);
  50        if (test_bit(ATM_VF_REGIS,&vcc->flags)) {
  51                prepare_to_wait(sk->sk_sleep, &wait, TASK_UNINTERRUPTIBLE);
  52                sigd_enq(vcc,as_close,NULL,NULL,NULL);
  53                while (!test_bit(ATM_VF_RELEASED,&vcc->flags) && sigd) {
  54                        schedule();
  55                        prepare_to_wait(sk->sk_sleep, &wait, TASK_UNINTERRUPTIBLE);
  56                }
  57                finish_wait(sk->sk_sleep, &wait);
  58        }
  59        /* beware - socket is still in use by atmsigd until the last
  60           as_indicate has been answered */
  61        while ((skb = skb_dequeue(&sk->sk_receive_queue)) != NULL) {
  62                atm_return(vcc, skb->truesize);
  63                pr_debug("LISTEN REL\n");
  64                sigd_enq2(NULL,as_reject,vcc,NULL,NULL,&vcc->qos,0);
  65                dev_kfree_skb(skb);
  66        }
  67        clear_bit(ATM_VF_REGIS, &vcc->flags);
  68        /* ... may retry later */
  69}
  70
  71
  72static int svc_release(struct socket *sock)
  73{
  74        struct sock *sk = sock->sk;
  75        struct atm_vcc *vcc;
  76
  77        if (sk)  {
  78                vcc = ATM_SD(sock);
  79                pr_debug("svc_release %p\n", vcc);
  80                clear_bit(ATM_VF_READY, &vcc->flags);
  81                /* VCC pointer is used as a reference, so we must not free it
  82                   (thereby subjecting it to re-use) before all pending connections
  83                   are closed */
  84                svc_disconnect(vcc);
  85                vcc_release(sock);
  86        }
  87        return 0;
  88}
  89
  90
  91static int svc_bind(struct socket *sock,struct sockaddr *sockaddr,
  92    int sockaddr_len)
  93{
  94        DEFINE_WAIT(wait);
  95        struct sock *sk = sock->sk;
  96        struct sockaddr_atmsvc *addr;
  97        struct atm_vcc *vcc;
  98        int error;
  99
 100        if (sockaddr_len != sizeof(struct sockaddr_atmsvc))
 101                return -EINVAL;
 102        lock_sock(sk);
 103        if (sock->state == SS_CONNECTED) {
 104                error = -EISCONN;
 105                goto out;
 106        }
 107        if (sock->state != SS_UNCONNECTED) {
 108                error = -EINVAL;
 109                goto out;
 110        }
 111        vcc = ATM_SD(sock);
 112        addr = (struct sockaddr_atmsvc *) sockaddr;
 113        if (addr->sas_family != AF_ATMSVC) {
 114                error = -EAFNOSUPPORT;
 115                goto out;
 116        }
 117        clear_bit(ATM_VF_BOUND,&vcc->flags);
 118            /* failing rebind will kill old binding */
 119        /* @@@ check memory (de)allocation on rebind */
 120        if (!test_bit(ATM_VF_HASQOS,&vcc->flags)) {
 121                error = -EBADFD;
 122                goto out;
 123        }
 124        vcc->local = *addr;
 125        set_bit(ATM_VF_WAITING, &vcc->flags);
 126        prepare_to_wait(sk->sk_sleep, &wait, TASK_UNINTERRUPTIBLE);
 127        sigd_enq(vcc,as_bind,NULL,NULL,&vcc->local);
 128        while (test_bit(ATM_VF_WAITING, &vcc->flags) && sigd) {
 129                schedule();
 130                prepare_to_wait(sk->sk_sleep, &wait, TASK_UNINTERRUPTIBLE);
 131        }
 132        finish_wait(sk->sk_sleep, &wait);
 133        clear_bit(ATM_VF_REGIS,&vcc->flags); /* doesn't count */
 134        if (!sigd) {
 135                error = -EUNATCH;
 136                goto out;
 137        }
 138        if (!sk->sk_err)
 139                set_bit(ATM_VF_BOUND,&vcc->flags);
 140        error = -sk->sk_err;
 141out:
 142        release_sock(sk);
 143        return error;
 144}
 145
 146
 147static int svc_connect(struct socket *sock,struct sockaddr *sockaddr,
 148    int sockaddr_len,int flags)
 149{
 150        DEFINE_WAIT(wait);
 151        struct sock *sk = sock->sk;
 152        struct sockaddr_atmsvc *addr;
 153        struct atm_vcc *vcc = ATM_SD(sock);
 154        int error;
 155
 156        pr_debug("svc_connect %p\n",vcc);
 157        lock_sock(sk);
 158        if (sockaddr_len != sizeof(struct sockaddr_atmsvc)) {
 159                error = -EINVAL;
 160                goto out;
 161        }
 162
 163        switch (sock->state) {
 164        default:
 165                error = -EINVAL;
 166                goto out;
 167        case SS_CONNECTED:
 168                error = -EISCONN;
 169                goto out;
 170        case SS_CONNECTING:
 171                if (test_bit(ATM_VF_WAITING, &vcc->flags)) {
 172                        error = -EALREADY;
 173                        goto out;
 174                }
 175                sock->state = SS_UNCONNECTED;
 176                if (sk->sk_err) {
 177                        error = -sk->sk_err;
 178                        goto out;
 179                }
 180                break;
 181        case SS_UNCONNECTED:
 182                addr = (struct sockaddr_atmsvc *) sockaddr;
 183                if (addr->sas_family != AF_ATMSVC) {
 184                        error = -EAFNOSUPPORT;
 185                        goto out;
 186                }
 187                if (!test_bit(ATM_VF_HASQOS, &vcc->flags)) {
 188                        error = -EBADFD;
 189                        goto out;
 190                }
 191                if (vcc->qos.txtp.traffic_class == ATM_ANYCLASS ||
 192                    vcc->qos.rxtp.traffic_class == ATM_ANYCLASS) {
 193                        error = -EINVAL;
 194                        goto out;
 195                }
 196                if (!vcc->qos.txtp.traffic_class &&
 197                    !vcc->qos.rxtp.traffic_class) {
 198                        error = -EINVAL;
 199                        goto out;
 200                }
 201                vcc->remote = *addr;
 202                set_bit(ATM_VF_WAITING, &vcc->flags);
 203                prepare_to_wait(sk->sk_sleep, &wait, TASK_INTERRUPTIBLE);
 204                sigd_enq(vcc,as_connect,NULL,NULL,&vcc->remote);
 205                if (flags & O_NONBLOCK) {
 206                        finish_wait(sk->sk_sleep, &wait);
 207                        sock->state = SS_CONNECTING;
 208                        error = -EINPROGRESS;
 209                        goto out;
 210                }
 211                error = 0;
 212                while (test_bit(ATM_VF_WAITING, &vcc->flags) && sigd) {
 213                        schedule();
 214                        if (!signal_pending(current)) {
 215                                prepare_to_wait(sk->sk_sleep, &wait, TASK_INTERRUPTIBLE);
 216                                continue;
 217                        }
 218                        pr_debug("*ABORT*\n");
 219                        /*
 220                         * This is tricky:
 221                         *   Kernel ---close--> Demon
 222                         *   Kernel <--close--- Demon
 223                         * or
 224                         *   Kernel ---close--> Demon
 225                         *   Kernel <--error--- Demon
 226                         * or
 227                         *   Kernel ---close--> Demon
 228                         *   Kernel <--okay---- Demon
 229                         *   Kernel <--close--- Demon
 230                         */
 231                        sigd_enq(vcc,as_close,NULL,NULL,NULL);
 232                        while (test_bit(ATM_VF_WAITING, &vcc->flags) && sigd) {
 233                                prepare_to_wait(sk->sk_sleep, &wait, TASK_INTERRUPTIBLE);
 234                                schedule();
 235                        }
 236                        if (!sk->sk_err)
 237                                while (!test_bit(ATM_VF_RELEASED,&vcc->flags)
 238                                    && sigd) {
 239                                        prepare_to_wait(sk->sk_sleep, &wait, TASK_INTERRUPTIBLE);
 240                                        schedule();
 241                                }
 242                        clear_bit(ATM_VF_REGIS,&vcc->flags);
 243                        clear_bit(ATM_VF_RELEASED,&vcc->flags);
 244                        clear_bit(ATM_VF_CLOSE,&vcc->flags);
 245                            /* we're gone now but may connect later */
 246                        error = -EINTR;
 247                        break;
 248                }
 249                finish_wait(sk->sk_sleep, &wait);
 250                if (error)
 251                        goto out;
 252                if (!sigd) {
 253                        error = -EUNATCH;
 254                        goto out;
 255                }
 256                if (sk->sk_err) {
 257                        error = -sk->sk_err;
 258                        goto out;
 259                }
 260        }
 261/*
 262 * Not supported yet
 263 *
 264 * #ifndef CONFIG_SINGLE_SIGITF
 265 */
 266        vcc->qos.txtp.max_pcr = SELECT_TOP_PCR(vcc->qos.txtp);
 267        vcc->qos.txtp.pcr = 0;
 268        vcc->qos.txtp.min_pcr = 0;
 269/*
 270 * #endif
 271 */
 272        if (!(error = vcc_connect(sock, vcc->itf, vcc->vpi, vcc->vci)))
 273                sock->state = SS_CONNECTED;
 274        else
 275                (void) svc_disconnect(vcc);
 276out:
 277        release_sock(sk);
 278        return error;
 279}
 280
 281
 282static int svc_listen(struct socket *sock,int backlog)
 283{
 284        DEFINE_WAIT(wait);
 285        struct sock *sk = sock->sk;
 286        struct atm_vcc *vcc = ATM_SD(sock);
 287        int error;
 288
 289        pr_debug("svc_listen %p\n",vcc);
 290        lock_sock(sk);
 291        /* let server handle listen on unbound sockets */
 292        if (test_bit(ATM_VF_SESSION,&vcc->flags)) {
 293                error = -EINVAL;
 294                goto out;
 295        }
 296        if (test_bit(ATM_VF_LISTEN, &vcc->flags)) {
 297                error = -EADDRINUSE;
 298                goto out;
 299        }
 300        set_bit(ATM_VF_WAITING, &vcc->flags);
 301        prepare_to_wait(sk->sk_sleep, &wait, TASK_UNINTERRUPTIBLE);
 302        sigd_enq(vcc,as_listen,NULL,NULL,&vcc->local);
 303        while (test_bit(ATM_VF_WAITING, &vcc->flags) && sigd) {
 304                schedule();
 305                prepare_to_wait(sk->sk_sleep, &wait, TASK_UNINTERRUPTIBLE);
 306        }
 307        finish_wait(sk->sk_sleep, &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
 321
 322static int svc_accept(struct socket *sock,struct socket *newsock,int flags)
 323{
 324        struct sock *sk = sock->sk;
 325        struct sk_buff *skb;
 326        struct atmsvc_msg *msg;
 327        struct atm_vcc *old_vcc = ATM_SD(sock);
 328        struct atm_vcc *new_vcc;
 329        int error;
 330
 331        lock_sock(sk);
 332
 333        error = svc_create(sock_net(sk), newsock,0);
 334        if (error)
 335                goto out;
 336
 337        new_vcc = ATM_SD(newsock);
 338
 339        pr_debug("svc_accept %p -> %p\n",old_vcc,new_vcc);
 340        while (1) {
 341                DEFINE_WAIT(wait);
 342
 343                prepare_to_wait(sk->sk_sleep, &wait, TASK_INTERRUPTIBLE);
 344                while (!(skb = skb_dequeue(&sk->sk_receive_queue)) &&
 345                       sigd) {
 346                        if (test_bit(ATM_VF_RELEASED,&old_vcc->flags)) 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->sk_sleep, &wait, TASK_INTERRUPTIBLE);
 363                }
 364                finish_wait(sk->sk_sleep, &wait);
 365                if (error)
 366                        goto out;
 367                if (!skb) {
 368                        error = -EUNATCH;
 369                        goto out;
 370                }
 371                msg = (struct atmsvc_msg *) skb->data;
 372                new_vcc->qos = msg->qos;
 373                set_bit(ATM_VF_HASQOS,&new_vcc->flags);
 374                new_vcc->remote = msg->svc;
 375                new_vcc->local = msg->local;
 376                new_vcc->sap = msg->sap;
 377                error = vcc_connect(newsock, msg->pvc.sap_addr.itf,
 378                                    msg->pvc.sap_addr.vpi, msg->pvc.sap_addr.vci);
 379                dev_kfree_skb(skb);
 380                sk->sk_ack_backlog--;
 381                if (error) {
 382                        sigd_enq2(NULL,as_reject,old_vcc,NULL,NULL,
 383                            &old_vcc->qos,error);
 384                        error = error == -EAGAIN ? -EBUSY : error;
 385                        goto out;
 386                }
 387                /* wait should be short, so we ignore the non-blocking flag */
 388                set_bit(ATM_VF_WAITING, &new_vcc->flags);
 389                prepare_to_wait(sk_atm(new_vcc)->sk_sleep, &wait, TASK_UNINTERRUPTIBLE);
 390                sigd_enq(new_vcc,as_accept,old_vcc,NULL,NULL);
 391                while (test_bit(ATM_VF_WAITING, &new_vcc->flags) && sigd) {
 392                        release_sock(sk);
 393                        schedule();
 394                        lock_sock(sk);
 395                        prepare_to_wait(sk_atm(new_vcc)->sk_sleep, &wait, TASK_UNINTERRUPTIBLE);
 396                }
 397                finish_wait(sk_atm(new_vcc)->sk_sleep, &wait);
 398                if (!sigd) {
 399                        error = -EUNATCH;
 400                        goto out;
 401                }
 402                if (!sk_atm(new_vcc)->sk_err)
 403                        break;
 404                if (sk_atm(new_vcc)->sk_err != ERESTARTSYS) {
 405                        error = -sk_atm(new_vcc)->sk_err;
 406                        goto out;
 407                }
 408        }
 409        newsock->state = SS_CONNECTED;
 410out:
 411        release_sock(sk);
 412        return error;
 413}
 414
 415
 416static int svc_getname(struct socket *sock,struct sockaddr *sockaddr,
 417    int *sockaddr_len,int peer)
 418{
 419        struct sockaddr_atmsvc *addr;
 420
 421        *sockaddr_len = sizeof(struct sockaddr_atmsvc);
 422        addr = (struct sockaddr_atmsvc *) sockaddr;
 423        memcpy(addr,peer ? &ATM_SD(sock)->remote : &ATM_SD(sock)->local,
 424            sizeof(struct sockaddr_atmsvc));
 425        return 0;
 426}
 427
 428
 429int svc_change_qos(struct atm_vcc *vcc,struct atm_qos *qos)
 430{
 431        struct sock *sk = sk_atm(vcc);
 432        DEFINE_WAIT(wait);
 433
 434        set_bit(ATM_VF_WAITING, &vcc->flags);
 435        prepare_to_wait(sk->sk_sleep, &wait, TASK_UNINTERRUPTIBLE);
 436        sigd_enq2(vcc,as_modify,NULL,NULL,&vcc->local,qos,0);
 437        while (test_bit(ATM_VF_WAITING, &vcc->flags) &&
 438               !test_bit(ATM_VF_RELEASED, &vcc->flags) && sigd) {
 439                schedule();
 440                prepare_to_wait(sk->sk_sleep, &wait, TASK_UNINTERRUPTIBLE);
 441        }
 442        finish_wait(sk->sk_sleep, &wait);
 443        if (!sigd) return -EUNATCH;
 444        return -sk->sk_err;
 445}
 446
 447
 448static int svc_setsockopt(struct socket *sock, int level, int optname,
 449                          char __user *optval, int optlen)
 450{
 451        struct sock *sk = sock->sk;
 452        struct atm_vcc *vcc = ATM_SD(sock);
 453        int value, error = 0;
 454
 455        lock_sock(sk);
 456        switch (optname) {
 457                case SO_ATMSAP:
 458                        if (level != SOL_ATM || optlen != sizeof(struct atm_sap)) {
 459                                error = -EINVAL;
 460                                goto out;
 461                        }
 462                        if (copy_from_user(&vcc->sap, optval, optlen)) {
 463                                error = -EFAULT;
 464                                goto out;
 465                        }
 466                        set_bit(ATM_VF_HASSAP, &vcc->flags);
 467                        break;
 468                case SO_MULTIPOINT:
 469                        if (level != SOL_ATM || optlen != sizeof(int)) {
 470                                error = -EINVAL;
 471                                goto out;
 472                        }
 473                        if (get_user(value, (int __user *) optval)) {
 474                                error = -EFAULT;
 475                                goto out;
 476                        }
 477                        if (value == 1) {
 478                                set_bit(ATM_VF_SESSION, &vcc->flags);
 479                        } else if (value == 0) {
 480                                clear_bit(ATM_VF_SESSION, &vcc->flags);
 481                        } else {
 482                                error = -EINVAL;
 483                        }
 484                        break;
 485                default:
 486                        error = vcc_setsockopt(sock, level, optname,
 487                                               optval, optlen);
 488        }
 489
 490out:
 491        release_sock(sk);
 492        return error;
 493}
 494
 495
 496static int svc_getsockopt(struct socket *sock,int level,int optname,
 497    char __user *optval,int __user *optlen)
 498{
 499        struct sock *sk = sock->sk;
 500        int error = 0, len;
 501
 502        lock_sock(sk);
 503        if (!__SO_LEVEL_MATCH(optname, level) || optname != SO_ATMSAP) {
 504                error = vcc_getsockopt(sock, level, optname, optval, optlen);
 505                goto out;
 506        }
 507        if (get_user(len, optlen)) {
 508                error = -EFAULT;
 509                goto out;
 510        }
 511        if (len != sizeof(struct atm_sap)) {
 512                error = -EINVAL;
 513                goto out;
 514        }
 515        if (copy_to_user(optval, &ATM_SD(sock)->sap, sizeof(struct atm_sap))) {
 516                error = -EFAULT;
 517                goto out;
 518        }
 519out:
 520        release_sock(sk);
 521        return error;
 522}
 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        prepare_to_wait(sk->sk_sleep, &wait, TASK_INTERRUPTIBLE);
 536        sigd_enq(vcc, as_addparty, NULL, NULL,
 537                 (struct sockaddr_atmsvc *) sockaddr);
 538        if (flags & O_NONBLOCK) {
 539                finish_wait(sk->sk_sleep, &wait);
 540                error = -EINPROGRESS;
 541                goto out;
 542        }
 543        pr_debug("svc_addparty added wait queue\n");
 544        while (test_bit(ATM_VF_WAITING, &vcc->flags) && sigd) {
 545                schedule();
 546                prepare_to_wait(sk->sk_sleep, &wait, TASK_INTERRUPTIBLE);
 547        }
 548        finish_wait(sk->sk_sleep, &wait);
 549        error = xchg(&sk->sk_err_soft, 0);
 550out:
 551        release_sock(sk);
 552        return error;
 553}
 554
 555
 556static int svc_dropparty(struct socket *sock, int ep_ref)
 557{
 558        DEFINE_WAIT(wait);
 559        struct sock *sk = sock->sk;
 560        struct atm_vcc *vcc = ATM_SD(sock);
 561        int error;
 562
 563        lock_sock(sk);
 564        set_bit(ATM_VF_WAITING, &vcc->flags);
 565        prepare_to_wait(sk->sk_sleep, &wait, TASK_INTERRUPTIBLE);
 566        sigd_enq2(vcc, as_dropparty, NULL, NULL, NULL, NULL, ep_ref);
 567        while (test_bit(ATM_VF_WAITING, &vcc->flags) && sigd) {
 568                schedule();
 569                prepare_to_wait(sk->sk_sleep, &wait, TASK_INTERRUPTIBLE);
 570        }
 571        finish_wait(sk->sk_sleep, &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
 582
 583static int svc_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
 584{
 585        int error, ep_ref;
 586        struct sockaddr_atmsvc sa;
 587        struct atm_vcc *vcc = ATM_SD(sock);
 588
 589        switch (cmd) {
 590                case ATM_ADDPARTY:
 591                        if (!test_bit(ATM_VF_SESSION, &vcc->flags))
 592                                return -EINVAL;
 593                        if (copy_from_user(&sa, (void __user *) arg, sizeof(sa)))
 594                                return -EFAULT;
 595                        error = svc_addparty(sock, (struct sockaddr *) &sa, sizeof(sa), 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, unsigned long arg)
 613{
 614        /* The definition of ATM_ADDPARTY uses the size of struct atm_iobuf.
 615           But actually it takes a struct sockaddr_atmsvc, which doesn't need
 616           compat handling. So all we have to do is fix up cmd... */
 617        if (cmd == COMPAT_ATM_ADDPARTY)
 618                cmd = ATM_ADDPARTY;
 619
 620        if (cmd == ATM_ADDPARTY || cmd == ATM_DROPPARTY)
 621                return svc_ioctl(sock, cmd, arg);
 622        else
 623                return vcc_compat_ioctl(sock, cmd, arg);
 624}
 625#endif /* CONFIG_COMPAT */
 626
 627static const struct proto_ops svc_proto_ops = {
 628        .family =       PF_ATMSVC,
 629        .owner =        THIS_MODULE,
 630
 631        .release =      svc_release,
 632        .bind =         svc_bind,
 633        .connect =      svc_connect,
 634        .socketpair =   sock_no_socketpair,
 635        .accept =       svc_accept,
 636        .getname =      svc_getname,
 637        .poll =         vcc_poll,
 638        .ioctl =        svc_ioctl,
 639#ifdef CONFIG_COMPAT
 640        .compat_ioctl = svc_compat_ioctl,
 641#endif
 642        .listen =       svc_listen,
 643        .shutdown =     svc_shutdown,
 644        .setsockopt =   svc_setsockopt,
 645        .getsockopt =   svc_getsockopt,
 646        .sendmsg =      vcc_sendmsg,
 647        .recvmsg =      vcc_recvmsg,
 648        .mmap =         sock_no_mmap,
 649        .sendpage =     sock_no_sendpage,
 650};
 651
 652
 653static int svc_create(struct net *net, struct socket *sock,int protocol)
 654{
 655        int error;
 656
 657        if (net != &init_net)
 658                return -EAFNOSUPPORT;
 659
 660        sock->ops = &svc_proto_ops;
 661        error = vcc_create(net, sock, protocol, AF_ATMSVC);
 662        if (error) return error;
 663        ATM_SD(sock)->local.sas_family = AF_ATMSVC;
 664        ATM_SD(sock)->remote.sas_family = AF_ATMSVC;
 665        return 0;
 666}
 667
 668
 669static struct net_proto_family svc_family_ops = {
 670        .family = PF_ATMSVC,
 671        .create = svc_create,
 672        .owner = THIS_MODULE,
 673};
 674
 675
 676/*
 677 *      Initialize the ATM SVC protocol family
 678 */
 679
 680int __init atmsvc_init(void)
 681{
 682        return sock_register(&svc_family_ops);
 683}
 684
 685void atmsvc_exit(void)
 686{
 687        sock_unregister(PF_ATMSVC);
 688}
 689