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
   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
  28
  29 #if 0
  30 #define DPRINTK(format,args...) printk(KERN_DEBUG format,##args)
  31 #else
  32 #define DPRINTK(format,args...)
  33 #endif
  34
  35
  36 static int svc_create(struct socket *sock,int protocol);
  37
  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
  52 static void svc_disconnect(struct atm_vcc *vcc)
  53 {
  54         DEFINE_WAIT(wait);
  55         struct sk_buff *skb;
  56         struct sock *sk = sk_atm(vcc);
  57
  58         DPRINTK("svc_disconnect %p\n",vcc);
  59         if (test_bit(ATM_VF_REGIS,&vcc->flags)) {
  60                 prepare_to_wait(sk->sk_sleep, &wait, TASK_UNINTERRUPTIBLE);
  61                 sigd_enq(vcc,as_close,NULL,NULL,NULL);
  62                 while (!test_bit(ATM_VF_RELEASED,&vcc->flags) && sigd) {
  63                         schedule();
  64                         prepare_to_wait(sk->sk_sleep, &wait, TASK_UNINTERRUPTIBLE);
  65                 }
  66                 finish_wait(sk->sk_sleep, &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                 DPRINTK("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
  81 static int svc_release(struct socket *sock)
  82 {
  83         struct sock *sk = sock->sk;
  84         struct atm_vcc *vcc;
  85
  86         if (sk)  {
  87                 vcc = ATM_SD(sock);
  88                 DPRINTK("svc_release %p\n", vcc);
  89                 clear_bit(ATM_VF_READY, &vcc->flags);
  90                 /* VCC pointer is used as a reference, so we must not free it
  91                    (thereby subjecting it to re-use) before all pending connections
  92                    are closed */
  93                 svc_disconnect(vcc);
  94                 vcc_release(sock);
  95         }
  96         return 0;
  97 }
  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         prepare_to_wait(sk->sk_sleep, &wait, TASK_UNINTERRUPTIBLE);
 136         sigd_enq(vcc,as_bind,NULL,NULL,&vcc->local);
 137         while (test_bit(ATM_VF_WAITING, &vcc->flags) && sigd) {
 138                 schedule();
 139                 prepare_to_wait(sk->sk_sleep, &wait, TASK_UNINTERRUPTIBLE);
 140         }
 141         finish_wait(sk->sk_sleep, &wait);
 142         clear_bit(ATM_VF_REGIS,&vcc->flags); /* doesn't count */
 143         if (!sigd) {
 144                 error = -EUNATCH;
 145                 goto out;
 146         }
 147         if (!sk->sk_err)
 148                 set_bit(ATM_VF_BOUND,&vcc->flags);
 149         error = -sk->sk_err;
 150 out:
 151         release_sock(sk);
 152         return error;
 153 }
 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         DPRINTK("svc_connect %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                 prepare_to_wait(sk->sk_sleep, &wait, TASK_INTERRUPTIBLE);
 213                 sigd_enq(vcc,as_connect,NULL,NULL,&vcc->remote);
 214                 if (flags & O_NONBLOCK) {
 215                         finish_wait(sk->sk_sleep, &wait);
 216                         sock->state = SS_CONNECTING;
 217                         error = -EINPROGRESS;
 218                         goto out;
 219                 }
 220                 error = 0;
 221                 while (test_bit(ATM_VF_WAITING, &vcc->flags) && sigd) {
 222                         schedule();
 223                         if (!signal_pending(current)) {
 224                                 prepare_to_wait(sk->sk_sleep, &wait, TASK_INTERRUPTIBLE);
 225                                 continue;
 226                         }
 227                         DPRINTK("*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->sk_sleep, &wait, TASK_INTERRUPTIBLE);
 243                                 schedule();
 244                         }
 245                         if (!sk->sk_err)
 246                                 while (!test_bit(ATM_VF_RELEASED,&vcc->flags)
 247                                     && sigd) {
 248                                         prepare_to_wait(sk->sk_sleep, &wait, TASK_INTERRUPTIBLE);
 249                                         schedule();
 250                                 }
 251                         clear_bit(ATM_VF_REGIS,&vcc->flags);
 252                         clear_bit(ATM_VF_RELEASED,&vcc->flags);
 253                         clear_bit(ATM_VF_CLOSE,&vcc->flags);
 254                             /* we're gone now but may connect later */
 255                         error = -EINTR;
 256                         break;
 257                 }
 258                 finish_wait(sk->sk_sleep, &wait);
 259                 if (error)
 260                         goto out;
 261                 if (!sigd) {
 262                         error = -EUNATCH;
 263                         goto out;
 264                 }
 265                 if (sk->sk_err) {
 266                         error = -sk->sk_err;
 267                         goto out;
 268                 }
 269         }
 270 /*
 271  * Not supported yet
 272  *
 273  * #ifndef CONFIG_SINGLE_SIGITF
 274  */
 275         vcc->qos.txtp.max_pcr = SELECT_TOP_PCR(vcc->qos.txtp);
 276         vcc->qos.txtp.pcr = 0;
 277         vcc->qos.txtp.min_pcr = 0;
 278 /*
 279  * #endif
 280  */
 281         if (!(error = vcc_connect(sock, vcc->itf, vcc->vpi, vcc->vci)))
 282                 sock->state = SS_CONNECTED;
 283         else
 284                 (void) svc_disconnect(vcc);
 285 out:
 286         release_sock(sk);
 287         return error;
 288 }
 289
 290
 291 static int svc_listen(struct socket *sock,int backlog)
 292 {
 293         DEFINE_WAIT(wait);
 294         struct sock *sk = sock->sk;
 295         struct atm_vcc *vcc = ATM_SD(sock);
 296         int error;
 297
 298         DPRINTK("svc_listen %p\n",vcc);
 299         lock_sock(sk);
 300         /* let server handle listen on unbound sockets */
 301         if (test_bit(ATM_VF_SESSION,&vcc->flags)) {
 302                 error = -EINVAL;
 303                 goto out;
 304         }
 305         set_bit(ATM_VF_WAITING, &vcc->flags);
 306         prepare_to_wait(sk->sk_sleep, &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->sk_sleep, &wait, TASK_UNINTERRUPTIBLE);
 311         }
 312         finish_wait(sk->sk_sleep, &wait);
 313         if (!sigd) {
 314                 error = -EUNATCH;
 315                 goto out;
 316         }
 317         set_bit(ATM_VF_LISTEN,&vcc->flags);
 318         sk->sk_max_ack_backlog = backlog > 0 ? backlog : ATM_BACKLOG_DEFAULT;
 319         error = -sk->sk_err;
 320 out:
 321         release_sock(sk);
 322         return error;
 323 }
 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(newsock,0);
 338         if (error)
 339                 goto out;
 340
 341         new_vcc = ATM_SD(newsock);
 342
 343         DPRINTK("svc_accept %p -> %p\n",old_vcc,new_vcc);
 344         while (1) {
 345                 DEFINE_WAIT(wait);
 346
 347                 prepare_to_wait(sk->sk_sleep, &wait, TASK_INTERRUPTIBLE);
 348                 while (!(skb = skb_dequeue(&sk->sk_receive_queue)) &&
 349                        sigd) {
 350                         if (test_bit(ATM_VF_RELEASED,&old_vcc->flags)) break;
 351                         if (test_bit(ATM_VF_CLOSE,&old_vcc->flags)) {
 352                                 error = -sk->sk_err;
 353                                 break;
 354                         }
 355                         if (flags & O_NONBLOCK) {
 356                                 error = -EAGAIN;
 357                                 break;
 358                         }
 359                         release_sock(sk);
 360                         schedule();
 361                         lock_sock(sk);
 362                         if (signal_pending(current)) {
 363                                 error = -ERESTARTSYS;
 364                                 break;
 365                         }
 366                         prepare_to_wait(sk->sk_sleep, &wait, TASK_INTERRUPTIBLE);
 367                 }
 368                 finish_wait(sk->sk_sleep, &wait);
 369                 if (error)
 370                         goto out;
 371                 if (!skb) {
 372                         error = -EUNATCH;
 373                         goto out;
 374                 }
 375                 msg = (struct atmsvc_msg *) skb->data;
 376                 new_vcc->qos = msg->qos;
 377                 set_bit(ATM_VF_HASQOS,&new_vcc->flags);
 378                 new_vcc->remote = msg->svc;
 379                 new_vcc->local = msg->local;
 380                 new_vcc->sap = msg->sap;
 381                 error = vcc_connect(newsock, msg->pvc.sap_addr.itf,
 382                                     msg->pvc.sap_addr.vpi, msg->pvc.sap_addr.vci);
 383                 dev_kfree_skb(skb);
 384                 sk->sk_ack_backlog--;
 385                 if (error) {
 386                         sigd_enq2(NULL,as_reject,old_vcc,NULL,NULL,
 387                             &old_vcc->qos,error);
 388                         error = error == -EAGAIN ? -EBUSY : error;
 389                         goto out;
 390                 }
 391                 /* wait should be short, so we ignore the non-blocking flag */
 392                 set_bit(ATM_VF_WAITING, &new_vcc->flags);
 393                 prepare_to_wait(sk_atm(new_vcc)->sk_sleep, &wait, TASK_UNINTERRUPTIBLE);
 394                 sigd_enq(new_vcc,as_accept,old_vcc,NULL,NULL);
 395                 while (test_bit(ATM_VF_WAITING, &new_vcc->flags) && sigd) {
 396                         release_sock(sk);
 397                         schedule();
 398                         lock_sock(sk);
 399                         prepare_to_wait(sk_atm(new_vcc)->sk_sleep, &wait, TASK_UNINTERRUPTIBLE);
 400                 }
 401                 finish_wait(sk_atm(new_vcc)->sk_sleep, &wait);
 402                 if (!sigd) {
 403                         error = -EUNATCH;
 404                         goto out;
 405                 }
 406                 if (!sk_atm(new_vcc)->sk_err)
 407                         break;
 408                 if (sk_atm(new_vcc)->sk_err != ERESTARTSYS) {
 409                         error = -sk_atm(new_vcc)->sk_err;
 410                         goto out;
 411                 }
 412         }
 413         newsock->state = SS_CONNECTED;
 414 out:
 415         release_sock(sk);
 416         return error;
 417 }
 418
 419
 420 static int svc_getname(struct socket *sock,struct sockaddr *sockaddr,
 421     int *sockaddr_len,int peer)
 422 {
 423         struct sockaddr_atmsvc *addr;
 424
 425         *sockaddr_len = sizeof(struct sockaddr_atmsvc);
 426         addr = (struct sockaddr_atmsvc *) sockaddr;
 427         memcpy(addr,peer ? &ATM_SD(sock)->remote : &ATM_SD(sock)->local,
 428             sizeof(struct sockaddr_atmsvc));
 429         return 0;
 430 }
 431
 432
 433 int svc_change_qos(struct atm_vcc *vcc,struct atm_qos *qos)
 434 {
 435         struct sock *sk = sk_atm(vcc);
 436         DEFINE_WAIT(wait);
 437
 438         set_bit(ATM_VF_WAITING, &vcc->flags);
 439         prepare_to_wait(sk->sk_sleep, &wait, TASK_UNINTERRUPTIBLE);
 440         sigd_enq2(vcc,as_modify,NULL,NULL,&vcc->local,qos,0);
 441         while (test_bit(ATM_VF_WAITING, &vcc->flags) &&
 442                !test_bit(ATM_VF_RELEASED, &vcc->flags) && sigd) {
 443                 schedule();
 444                 prepare_to_wait(sk->sk_sleep, &wait, TASK_UNINTERRUPTIBLE);
 445         }
 446         finish_wait(sk->sk_sleep, &wait);
 447         if (!sigd) return -EUNATCH;
 448         return -sk->sk_err;
 449 }
 450
 451
 452 static int svc_setsockopt(struct socket *sock, int level, int optname,
 453                           char __user *optval, 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                         }
 488                         break;
 489                 default:
 490                         error = vcc_setsockopt(sock, level, optname,
 491                                                optval, optlen);
 492         }
 493
 494 out:
 495         release_sock(sk);
 496         return error;
 497 }
 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
 529 static int svc_addparty(struct socket *sock, struct sockaddr *sockaddr,
 530                         int sockaddr_len, int flags)
 531 {
 532         DEFINE_WAIT(wait);
 533         struct sock *sk = sock->sk;
 534         struct atm_vcc *vcc = ATM_SD(sock);
 535         int error;
 536
 537         lock_sock(sk);
 538         set_bit(ATM_VF_WAITING, &vcc->flags);
 539         prepare_to_wait(sk->sk_sleep, &wait, TASK_INTERRUPTIBLE);
 540         sigd_enq(vcc, as_addparty, NULL, NULL,
 541                  (struct sockaddr_atmsvc *) sockaddr);
 542         if (flags & O_NONBLOCK) {
 543                 finish_wait(sk->sk_sleep, &wait);
 544                 error = -EINPROGRESS;
 545                 goto out;
 546         }
 547         DPRINTK("svc_addparty added wait queue\n");
 548         while (test_bit(ATM_VF_WAITING, &vcc->flags) && sigd) {
 549                 schedule();
 550                 prepare_to_wait(sk->sk_sleep, &wait, TASK_INTERRUPTIBLE);
 551         }
 552         finish_wait(sk->sk_sleep, &wait);
 553         error = xchg(&sk->sk_err_soft, 0);
 554 out:
 555         release_sock(sk);
 556         return error;
 557 }
 558
 559
 560 static int svc_dropparty(struct socket *sock, int ep_ref)
 561 {
 562         DEFINE_WAIT(wait);
 563         struct sock *sk = sock->sk;
 564         struct atm_vcc *vcc = ATM_SD(sock);
 565         int error;
 566
 567         lock_sock(sk);
 568         set_bit(ATM_VF_WAITING, &vcc->flags);
 569         prepare_to_wait(sk->sk_sleep, &wait, TASK_INTERRUPTIBLE);
 570         sigd_enq2(vcc, as_dropparty, NULL, NULL, NULL, NULL, ep_ref);
 571         while (test_bit(ATM_VF_WAITING, &vcc->flags) && sigd) {
 572                 schedule();
 573                 prepare_to_wait(sk->sk_sleep, &wait, TASK_INTERRUPTIBLE);
 574         }
 575         finish_wait(sk->sk_sleep, &wait);
 576         if (!sigd) {
 577                 error = -EUNATCH;
 578                 goto out;
 579         }
 580         error = xchg(&sk->sk_err_soft, 0);
 581 out:
 582         release_sock(sk);
 583         return error;
 584 }
 585
 586
 587 static int svc_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
 588 {
 589         int error, ep_ref;
 590         struct sockaddr_atmsvc sa;
 591         struct atm_vcc *vcc = ATM_SD(sock);
 592
 593         switch (cmd) {
 594                 case ATM_ADDPARTY:
 595                         if (!test_bit(ATM_VF_SESSION, &vcc->flags))
 596                                 return -EINVAL;
 597                         if (copy_from_user(&sa, (void __user *) arg, sizeof(sa)))
 598                                 return -EFAULT;
 599                         error = svc_addparty(sock, (struct sockaddr *) &sa, sizeof(sa), 0);
 600                         break;
 601                 case ATM_DROPPARTY:
 602                         if (!test_bit(ATM_VF_SESSION, &vcc->flags))
 603                                 return -EINVAL;
 604                         if (copy_from_user(&ep_ref, (void __user *) arg, sizeof(int)))
 605                                 return -EFAULT;
 606                         error = svc_dropparty(sock, ep_ref);
 607                         break;
 608                 default:
 609                         error = vcc_ioctl(sock, cmd, arg);
 610         }
 611
 612         return error;
 613 }
 614
 615 static struct proto_ops svc_proto_ops = {
 616         .family =       PF_ATMSVC,
 617         .owner =        THIS_MODULE,
 618
 619         .release =      svc_release,
 620         .bind =         svc_bind,
 621         .connect =      svc_connect,
 622         .socketpair =   sock_no_socketpair,
 623         .accept =       svc_accept,
 624         .getname =      svc_getname,
 625         .poll =         vcc_poll,
 626         .ioctl =        svc_ioctl,
 627         .listen =       svc_listen,
 628         .shutdown =     svc_shutdown,
 629         .setsockopt =   svc_setsockopt,
 630         .getsockopt =   svc_getsockopt,
 631         .sendmsg =      vcc_sendmsg,
 632         .recvmsg =      vcc_recvmsg,
 633         .mmap =         sock_no_mmap,
 634         .sendpage =     sock_no_sendpage,
 635 };
 636
 637
 638 static int svc_create(struct socket *sock,int protocol)
 639 {
 640         int error;
 641
 642         sock->ops = &svc_proto_ops;
 643         error = vcc_create(sock, protocol, AF_ATMSVC);
 644         if (error) return error;
 645         ATM_SD(sock)->local.sas_family = AF_ATMSVC;
 646         ATM_SD(sock)->remote.sas_family = AF_ATMSVC;
 647         return 0;
 648 }
 649
 650
 651 static struct net_proto_family svc_family_ops = {
 652         .family = PF_ATMSVC,
 653         .create = svc_create,
 654         .owner = THIS_MODULE,
 655 };
 656
 657
 658 /*
 659  *      Initialize the ATM SVC protocol family
 660  */
 661
 662 int __init atmsvc_init(void)
 663 {
 664         return sock_register(&svc_family_ops);
 665 }
 666
 667 void atmsvc_exit(void)
 668 {
 669         sock_unregister(PF_ATMSVC);
 670 }