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 static 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
  37 static int svc_shutdown(struct socket *sock,int how)
  38 {
  39         return 0;
  40 }
  41
  42
  43 static 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
  72 static 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
  91 static 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;
 141 out:
 142         release_sock(sk);
 143         return error;
 144 }
 145
 146
 147 static 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);
 276 out:
 277         release_sock(sk);
 278         return error;
 279 }
 280
 281
 282 static 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;
 316 out:
 317         release_sock(sk);
 318         return error;
 319 }
 320
 321
 322 static 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;
 410 out:
 411         release_sock(sk);
 412         return error;
 413 }
 414
 415
 416 static 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
 429 int 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
 448 static int svc_setsockopt(struct socket *sock, int level, int optname,
 449                           char __user *optval, unsigned 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
 490 out:
 491         release_sock(sk);
 492         return error;
 493 }
 494
 495
 496 static 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         }
 519 out:
 520         release_sock(sk);
 521         return error;
 522 }
 523
 524
 525 static 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);
 550 out:
 551         release_sock(sk);
 552         return error;
 553 }
 554
 555
 556 static 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);
 577 out:
 578         release_sock(sk);
 579         return error;
 580 }
 581
 582
 583 static 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
 612 static 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
 627 static 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
 653 static 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
 669 static const 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
 680 int __init atmsvc_init(void)
 681 {
 682         return sock_register(&svc_family_ops);
 683 }
 684
 685 void atmsvc_exit(void)
 686 {
 687         sock_unregister(PF_ATMSVC);
 688 }