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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 <asm/uaccess.h>
  23
  24 #include "resources.h"
  25 #include "common.h"             /* common for PVCs and SVCs */
  26 #include "signaling.h"
  27 #include "addr.h"
  28
  29 static int svc_create(struct net *net, struct socket *sock, int protocol, int kern);
  30
  31 /*
  32  * Note: since all this is still nicely synchronized with the signaling demon,
  33  *       there's no need to protect sleep loops with clis. If signaling is
  34  *       moved into the kernel, that would change.
  35  */
  36
  37
  38 static int svc_shutdown(struct socket *sock,int how)
  39 {
  40         return 0;
  41 }
  42
  43
  44 static void svc_disconnect(struct atm_vcc *vcc)
  45 {
  46         DEFINE_WAIT(wait);
  47         struct sk_buff *skb;
  48         struct sock *sk = sk_atm(vcc);
  49
  50         pr_debug("%p\n",vcc);
  51         if (test_bit(ATM_VF_REGIS,&vcc->flags)) {
  52                 prepare_to_wait(sk->sk_sleep, &wait, TASK_UNINTERRUPTIBLE);
  53                 sigd_enq(vcc,as_close,NULL,NULL,NULL);
  54                 while (!test_bit(ATM_VF_RELEASED,&vcc->flags) && sigd) {
  55                         schedule();
  56                         prepare_to_wait(sk->sk_sleep, &wait, TASK_UNINTERRUPTIBLE);
  57                 }
  58                 finish_wait(sk->sk_sleep, &wait);
  59         }
  60         /* beware - socket is still in use by atmsigd until the last
  61            as_indicate has been answered */
  62         while ((skb = skb_dequeue(&sk->sk_receive_queue)) != NULL) {
  63                 atm_return(vcc, skb->truesize);
  64                 pr_debug("LISTEN REL\n");
  65                 sigd_enq2(NULL,as_reject,vcc,NULL,NULL,&vcc->qos,0);
  66                 dev_kfree_skb(skb);
  67         }
  68         clear_bit(ATM_VF_REGIS, &vcc->flags);
  69         /* ... may retry later */
  70 }
  71
  72
  73 static int svc_release(struct socket *sock)
  74 {
  75         struct sock *sk = sock->sk;
  76         struct atm_vcc *vcc;
  77
  78         if (sk)  {
  79                 vcc = ATM_SD(sock);
  80                 pr_debug("%p\n", vcc);
  81                 clear_bit(ATM_VF_READY, &vcc->flags);
  82                 /* VCC pointer is used as a reference, so we must not free it
  83                    (thereby subjecting it to re-use) before all pending connections
  84                    are closed */
  85                 svc_disconnect(vcc);
  86                 vcc_release(sock);
  87         }
  88         return 0;
  89 }
  90
  91
  92 static int svc_bind(struct socket *sock,struct sockaddr *sockaddr,
  93     int sockaddr_len)
  94 {
  95         DEFINE_WAIT(wait);
  96         struct sock *sk = sock->sk;
  97         struct sockaddr_atmsvc *addr;
  98         struct atm_vcc *vcc;
  99         int error;
 100
 101         if (sockaddr_len != sizeof(struct sockaddr_atmsvc))
 102                 return -EINVAL;
 103         lock_sock(sk);
 104         if (sock->state == SS_CONNECTED) {
 105                 error = -EISCONN;
 106                 goto out;
 107         }
 108         if (sock->state != SS_UNCONNECTED) {
 109                 error = -EINVAL;
 110                 goto out;
 111         }
 112         vcc = ATM_SD(sock);
 113         addr = (struct sockaddr_atmsvc *) sockaddr;
 114         if (addr->sas_family != AF_ATMSVC) {
 115                 error = -EAFNOSUPPORT;
 116                 goto out;
 117         }
 118         clear_bit(ATM_VF_BOUND,&vcc->flags);
 119             /* failing rebind will kill old binding */
 120         /* @@@ check memory (de)allocation on rebind */
 121         if (!test_bit(ATM_VF_HASQOS,&vcc->flags)) {
 122                 error = -EBADFD;
 123                 goto out;
 124         }
 125         vcc->local = *addr;
 126         set_bit(ATM_VF_WAITING, &vcc->flags);
 127         prepare_to_wait(sk->sk_sleep, &wait, TASK_UNINTERRUPTIBLE);
 128         sigd_enq(vcc,as_bind,NULL,NULL,&vcc->local);
 129         while (test_bit(ATM_VF_WAITING, &vcc->flags) && sigd) {
 130                 schedule();
 131                 prepare_to_wait(sk->sk_sleep, &wait, TASK_UNINTERRUPTIBLE);
 132         }
 133         finish_wait(sk->sk_sleep, &wait);
 134         clear_bit(ATM_VF_REGIS,&vcc->flags); /* doesn't count */
 135         if (!sigd) {
 136                 error = -EUNATCH;
 137                 goto out;
 138         }
 139         if (!sk->sk_err)
 140                 set_bit(ATM_VF_BOUND,&vcc->flags);
 141         error = -sk->sk_err;
 142 out:
 143         release_sock(sk);
 144         return error;
 145 }
 146
 147
 148 static int svc_connect(struct socket *sock,struct sockaddr *sockaddr,
 149     int sockaddr_len,int flags)
 150 {
 151         DEFINE_WAIT(wait);
 152         struct sock *sk = sock->sk;
 153         struct sockaddr_atmsvc *addr;
 154         struct atm_vcc *vcc = ATM_SD(sock);
 155         int error;
 156
 157         pr_debug("%p\n",vcc);
 158         lock_sock(sk);
 159         if (sockaddr_len != sizeof(struct sockaddr_atmsvc)) {
 160                 error = -EINVAL;
 161                 goto out;
 162         }
 163
 164         switch (sock->state) {
 165         default:
 166                 error = -EINVAL;
 167                 goto out;
 168         case SS_CONNECTED:
 169                 error = -EISCONN;
 170                 goto out;
 171         case SS_CONNECTING:
 172                 if (test_bit(ATM_VF_WAITING, &vcc->flags)) {
 173                         error = -EALREADY;
 174                         goto out;
 175                 }
 176                 sock->state = SS_UNCONNECTED;
 177                 if (sk->sk_err) {
 178                         error = -sk->sk_err;
 179                         goto out;
 180                 }
 181                 break;
 182         case SS_UNCONNECTED:
 183                 addr = (struct sockaddr_atmsvc *) sockaddr;
 184                 if (addr->sas_family != AF_ATMSVC) {
 185                         error = -EAFNOSUPPORT;
 186                         goto out;
 187                 }
 188                 if (!test_bit(ATM_VF_HASQOS, &vcc->flags)) {
 189                         error = -EBADFD;
 190                         goto out;
 191                 }
 192                 if (vcc->qos.txtp.traffic_class == ATM_ANYCLASS ||
 193                     vcc->qos.rxtp.traffic_class == ATM_ANYCLASS) {
 194                         error = -EINVAL;
 195                         goto out;
 196                 }
 197                 if (!vcc->qos.txtp.traffic_class &&
 198                     !vcc->qos.rxtp.traffic_class) {
 199                         error = -EINVAL;
 200                         goto out;
 201                 }
 202                 vcc->remote = *addr;
 203                 set_bit(ATM_VF_WAITING, &vcc->flags);
 204                 prepare_to_wait(sk->sk_sleep, &wait, TASK_INTERRUPTIBLE);
 205                 sigd_enq(vcc,as_connect,NULL,NULL,&vcc->remote);
 206                 if (flags & O_NONBLOCK) {
 207                         finish_wait(sk->sk_sleep, &wait);
 208                         sock->state = SS_CONNECTING;
 209                         error = -EINPROGRESS;
 210                         goto out;
 211                 }
 212                 error = 0;
 213                 while (test_bit(ATM_VF_WAITING, &vcc->flags) && sigd) {
 214                         schedule();
 215                         if (!signal_pending(current)) {
 216                                 prepare_to_wait(sk->sk_sleep, &wait, TASK_INTERRUPTIBLE);
 217                                 continue;
 218                         }
 219                         pr_debug("*ABORT*\n");
 220                         /*
 221                          * This is tricky:
 222                          *   Kernel ---close--> Demon
 223                          *   Kernel <--close--- Demon
 224                          * or
 225                          *   Kernel ---close--> Demon
 226                          *   Kernel <--error--- Demon
 227                          * or
 228                          *   Kernel ---close--> Demon
 229                          *   Kernel <--okay---- Demon
 230                          *   Kernel <--close--- Demon
 231                          */
 232                         sigd_enq(vcc,as_close,NULL,NULL,NULL);
 233                         while (test_bit(ATM_VF_WAITING, &vcc->flags) && sigd) {
 234                                 prepare_to_wait(sk->sk_sleep, &wait, TASK_INTERRUPTIBLE);
 235                                 schedule();
 236                         }
 237                         if (!sk->sk_err)
 238                                 while (!test_bit(ATM_VF_RELEASED,&vcc->flags)
 239                                     && sigd) {
 240                                         prepare_to_wait(sk->sk_sleep, &wait, TASK_INTERRUPTIBLE);
 241                                         schedule();
 242                                 }
 243                         clear_bit(ATM_VF_REGIS,&vcc->flags);
 244                         clear_bit(ATM_VF_RELEASED,&vcc->flags);
 245                         clear_bit(ATM_VF_CLOSE,&vcc->flags);
 246                             /* we're gone now but may connect later */
 247                         error = -EINTR;
 248                         break;
 249                 }
 250                 finish_wait(sk->sk_sleep, &wait);
 251                 if (error)
 252                         goto out;
 253                 if (!sigd) {
 254                         error = -EUNATCH;
 255                         goto out;
 256                 }
 257                 if (sk->sk_err) {
 258                         error = -sk->sk_err;
 259                         goto out;
 260                 }
 261         }
 262 /*
 263  * Not supported yet
 264  *
 265  * #ifndef CONFIG_SINGLE_SIGITF
 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  * #endif
 272  */
 273         if (!(error = vcc_connect(sock, vcc->itf, vcc->vpi, vcc->vci)))
 274                 sock->state = SS_CONNECTED;
 275         else
 276                 (void) svc_disconnect(vcc);
 277 out:
 278         release_sock(sk);
 279         return error;
 280 }
 281
 282
 283 static int svc_listen(struct socket *sock,int backlog)
 284 {
 285         DEFINE_WAIT(wait);
 286         struct sock *sk = sock->sk;
 287         struct atm_vcc *vcc = ATM_SD(sock);
 288         int error;
 289
 290         pr_debug("%p\n", vcc);
 291         lock_sock(sk);
 292         /* let server handle listen on unbound sockets */
 293         if (test_bit(ATM_VF_SESSION,&vcc->flags)) {
 294                 error = -EINVAL;
 295                 goto out;
 296         }
 297         if (test_bit(ATM_VF_LISTEN, &vcc->flags)) {
 298                 error = -EADDRINUSE;
 299                 goto out;
 300         }
 301         set_bit(ATM_VF_WAITING, &vcc->flags);
 302         prepare_to_wait(sk->sk_sleep, &wait, TASK_UNINTERRUPTIBLE);
 303         sigd_enq(vcc,as_listen,NULL,NULL,&vcc->local);
 304         while (test_bit(ATM_VF_WAITING, &vcc->flags) && sigd) {
 305                 schedule();
 306                 prepare_to_wait(sk->sk_sleep, &wait, TASK_UNINTERRUPTIBLE);
 307         }
 308         finish_wait(sk->sk_sleep, &wait);
 309         if (!sigd) {
 310                 error = -EUNATCH;
 311                 goto out;
 312         }
 313         set_bit(ATM_VF_LISTEN,&vcc->flags);
 314         vcc_insert_socket(sk);
 315         sk->sk_max_ack_backlog = backlog > 0 ? backlog : ATM_BACKLOG_DEFAULT;
 316         error = -sk->sk_err;
 317 out:
 318         release_sock(sk);
 319         return error;
 320 }
 321
 322
 323 static int svc_accept(struct socket *sock,struct socket *newsock,int flags)
 324 {
 325         struct sock *sk = sock->sk;
 326         struct sk_buff *skb;
 327         struct atmsvc_msg *msg;
 328         struct atm_vcc *old_vcc = ATM_SD(sock);
 329         struct atm_vcc *new_vcc;
 330         int error;
 331
 332         lock_sock(sk);
 333
 334         error = svc_create(sock_net(sk), newsock, 0, 0);
 335         if (error)
 336                 goto out;
 337
 338         new_vcc = ATM_SD(newsock);
 339
 340         pr_debug("%p -> %p\n", old_vcc, new_vcc);
 341         while (1) {
 342                 DEFINE_WAIT(wait);
 343
 344                 prepare_to_wait(sk->sk_sleep, &wait, TASK_INTERRUPTIBLE);
 345                 while (!(skb = skb_dequeue(&sk->sk_receive_queue)) &&
 346                        sigd) {
 347                         if (test_bit(ATM_VF_RELEASED,&old_vcc->flags)) break;
 348                         if (test_bit(ATM_VF_CLOSE,&old_vcc->flags)) {
 349                                 error = -sk->sk_err;
 350                                 break;
 351                         }
 352                         if (flags & O_NONBLOCK) {
 353                                 error = -EAGAIN;
 354                                 break;
 355                         }
 356                         release_sock(sk);
 357                         schedule();
 358                         lock_sock(sk);
 359                         if (signal_pending(current)) {
 360                                 error = -ERESTARTSYS;
 361                                 break;
 362                         }
 363                         prepare_to_wait(sk->sk_sleep, &wait, TASK_INTERRUPTIBLE);
 364                 }
 365                 finish_wait(sk->sk_sleep, &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, msg->pvc.sap_addr.vci);
 380                 dev_kfree_skb(skb);
 381                 sk->sk_ack_backlog--;
 382                 if (error) {
 383                         sigd_enq2(NULL,as_reject,old_vcc,NULL,NULL,
 384                             &old_vcc->qos,error);
 385                         error = error == -EAGAIN ? -EBUSY : error;
 386                         goto out;
 387                 }
 388                 /* wait should be short, so we ignore the non-blocking flag */
 389                 set_bit(ATM_VF_WAITING, &new_vcc->flags);
 390                 prepare_to_wait(sk_atm(new_vcc)->sk_sleep, &wait, TASK_UNINTERRUPTIBLE);
 391                 sigd_enq(new_vcc,as_accept,old_vcc,NULL,NULL);
 392                 while (test_bit(ATM_VF_WAITING, &new_vcc->flags) && sigd) {
 393                         release_sock(sk);
 394                         schedule();
 395                         lock_sock(sk);
 396                         prepare_to_wait(sk_atm(new_vcc)->sk_sleep, &wait, TASK_UNINTERRUPTIBLE);
 397                 }
 398                 finish_wait(sk_atm(new_vcc)->sk_sleep, &wait);
 399                 if (!sigd) {
 400                         error = -EUNATCH;
 401                         goto out;
 402                 }
 403                 if (!sk_atm(new_vcc)->sk_err)
 404                         break;
 405                 if (sk_atm(new_vcc)->sk_err != ERESTARTSYS) {
 406                         error = -sk_atm(new_vcc)->sk_err;
 407                         goto out;
 408                 }
 409         }
 410         newsock->state = SS_CONNECTED;
 411 out:
 412         release_sock(sk);
 413         return error;
 414 }
 415
 416
 417 static int svc_getname(struct socket *sock,struct sockaddr *sockaddr,
 418     int *sockaddr_len,int peer)
 419 {
 420         struct sockaddr_atmsvc *addr;
 421
 422         *sockaddr_len = sizeof(struct sockaddr_atmsvc);
 423         addr = (struct sockaddr_atmsvc *) sockaddr;
 424         memcpy(addr,peer ? &ATM_SD(sock)->remote : &ATM_SD(sock)->local,
 425             sizeof(struct sockaddr_atmsvc));
 426         return 0;
 427 }
 428
 429
 430 int svc_change_qos(struct atm_vcc *vcc,struct atm_qos *qos)
 431 {
 432         struct sock *sk = sk_atm(vcc);
 433         DEFINE_WAIT(wait);
 434
 435         set_bit(ATM_VF_WAITING, &vcc->flags);
 436         prepare_to_wait(sk->sk_sleep, &wait, TASK_UNINTERRUPTIBLE);
 437         sigd_enq2(vcc,as_modify,NULL,NULL,&vcc->local,qos,0);
 438         while (test_bit(ATM_VF_WAITING, &vcc->flags) &&
 439                !test_bit(ATM_VF_RELEASED, &vcc->flags) && sigd) {
 440                 schedule();
 441                 prepare_to_wait(sk->sk_sleep, &wait, TASK_UNINTERRUPTIBLE);
 442         }
 443         finish_wait(sk->sk_sleep, &wait);
 444         if (!sigd) return -EUNATCH;
 445         return -sk->sk_err;
 446 }
 447
 448
 449 static int svc_setsockopt(struct socket *sock, int level, int optname,
 450                           char __user *optval, unsigned int optlen)
 451 {
 452         struct sock *sk = sock->sk;
 453         struct atm_vcc *vcc = ATM_SD(sock);
 454         int value, error = 0;
 455
 456         lock_sock(sk);
 457         switch (optname) {
 458                 case SO_ATMSAP:
 459                         if (level != SOL_ATM || optlen != sizeof(struct atm_sap)) {
 460                                 error = -EINVAL;
 461                                 goto out;
 462                         }
 463                         if (copy_from_user(&vcc->sap, optval, optlen)) {
 464                                 error = -EFAULT;
 465                                 goto out;
 466                         }
 467                         set_bit(ATM_VF_HASSAP, &vcc->flags);
 468                         break;
 469                 case SO_MULTIPOINT:
 470                         if (level != SOL_ATM || optlen != sizeof(int)) {
 471                                 error = -EINVAL;
 472                                 goto out;
 473                         }
 474                         if (get_user(value, (int __user *) optval)) {
 475                                 error = -EFAULT;
 476                                 goto out;
 477                         }
 478                         if (value == 1) {
 479                                 set_bit(ATM_VF_SESSION, &vcc->flags);
 480                         } else if (value == 0) {
 481                                 clear_bit(ATM_VF_SESSION, &vcc->flags);
 482                         } else {
 483                                 error = -EINVAL;
 484                         }
 485                         break;
 486                 default:
 487                         error = vcc_setsockopt(sock, level, optname,
 488                                                optval, optlen);
 489         }
 490
 491 out:
 492         release_sock(sk);
 493         return error;
 494 }
 495
 496
 497 static 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         }
 520 out:
 521         release_sock(sk);
 522         return error;
 523 }
 524
 525
 526 static int svc_addparty(struct socket *sock, struct sockaddr *sockaddr,
 527                         int sockaddr_len, int flags)
 528 {
 529         DEFINE_WAIT(wait);
 530         struct sock *sk = sock->sk;
 531         struct atm_vcc *vcc = ATM_SD(sock);
 532         int error;
 533
 534         lock_sock(sk);
 535         set_bit(ATM_VF_WAITING, &vcc->flags);
 536         prepare_to_wait(sk->sk_sleep, &wait, TASK_INTERRUPTIBLE);
 537         sigd_enq(vcc, as_addparty, NULL, NULL,
 538                  (struct sockaddr_atmsvc *) sockaddr);
 539         if (flags & O_NONBLOCK) {
 540                 finish_wait(sk->sk_sleep, &wait);
 541                 error = -EINPROGRESS;
 542                 goto out;
 543         }
 544         pr_debug("added wait queue\n");
 545         while (test_bit(ATM_VF_WAITING, &vcc->flags) && sigd) {
 546                 schedule();
 547                 prepare_to_wait(sk->sk_sleep, &wait, TASK_INTERRUPTIBLE);
 548         }
 549         finish_wait(sk->sk_sleep, &wait);
 550         error = xchg(&sk->sk_err_soft, 0);
 551 out:
 552         release_sock(sk);
 553         return error;
 554 }
 555
 556
 557 static int svc_dropparty(struct socket *sock, int ep_ref)
 558 {
 559         DEFINE_WAIT(wait);
 560         struct sock *sk = sock->sk;
 561         struct atm_vcc *vcc = ATM_SD(sock);
 562         int error;
 563
 564         lock_sock(sk);
 565         set_bit(ATM_VF_WAITING, &vcc->flags);
 566         prepare_to_wait(sk->sk_sleep, &wait, TASK_INTERRUPTIBLE);
 567         sigd_enq2(vcc, as_dropparty, NULL, NULL, NULL, NULL, ep_ref);
 568         while (test_bit(ATM_VF_WAITING, &vcc->flags) && sigd) {
 569                 schedule();
 570                 prepare_to_wait(sk->sk_sleep, &wait, TASK_INTERRUPTIBLE);
 571         }
 572         finish_wait(sk->sk_sleep, &wait);
 573         if (!sigd) {
 574                 error = -EUNATCH;
 575                 goto out;
 576         }
 577         error = xchg(&sk->sk_err_soft, 0);
 578 out:
 579         release_sock(sk);
 580         return error;
 581 }
 582
 583
 584 static int svc_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
 585 {
 586         int error, ep_ref;
 587         struct sockaddr_atmsvc sa;
 588         struct atm_vcc *vcc = ATM_SD(sock);
 589
 590         switch (cmd) {
 591                 case ATM_ADDPARTY:
 592                         if (!test_bit(ATM_VF_SESSION, &vcc->flags))
 593                                 return -EINVAL;
 594                         if (copy_from_user(&sa, (void __user *) arg, sizeof(sa)))
 595                                 return -EFAULT;
 596                         error = svc_addparty(sock, (struct sockaddr *) &sa, sizeof(sa), 0);
 597                         break;
 598                 case ATM_DROPPARTY:
 599                         if (!test_bit(ATM_VF_SESSION, &vcc->flags))
 600                                 return -EINVAL;
 601                         if (copy_from_user(&ep_ref, (void __user *) arg, sizeof(int)))
 602                                 return -EFAULT;
 603                         error = svc_dropparty(sock, ep_ref);
 604                         break;
 605                 default:
 606                         error = vcc_ioctl(sock, cmd, arg);
 607         }
 608
 609         return error;
 610 }
 611
 612 #ifdef CONFIG_COMPAT
 613 static int svc_compat_ioctl(struct socket *sock, unsigned int cmd, 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
 628 static 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
 654 static 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) return error;
 665         ATM_SD(sock)->local.sas_family = AF_ATMSVC;
 666         ATM_SD(sock)->remote.sas_family = AF_ATMSVC;
 667         return 0;
 668 }
 669
 670
 671 static 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
 682 int __init atmsvc_init(void)
 683 {
 684         return sock_register(&svc_family_ops);
 685 }
 686
 687 void atmsvc_exit(void)
 688 {
 689         sock_unregister(PF_ATMSVC);
 690 }