sys/emulation/linux/linux_ipc.c

   1 /*-
   2  * Copyright (c) 1994-1995 Søren Schmidt
   3  * All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions
   7  * are met:
   8  * 1. Redistributions of source code must retain the above copyright
   9  *    notice, this list of conditions and the following disclaimer
  10  *    in this position and unchanged.
  11  * 2. Redistributions in binary form must reproduce the above copyright
  12  *    notice, this list of conditions and the following disclaimer in the
  13  *    documentation and/or other materials provided with the distribution.
  14  * 3. The name of the author may not be used to endorse or promote products
  15  *    derived from this software withough specific prior written permission
  16  *
  17  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
  18  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  19  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  20  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
  21  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  22  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  23  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  24  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  25  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  26  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  27  *
  28  * $FreeBSD: src/sys/compat/linux/linux_ipc.c,v 1.17.2.3 2001/11/05 19:08:22 marcel Exp $
  29  * $DragonFly: src/sys/emulation/linux/linux_ipc.c,v 1.8 2006/06/05 07:26:09 dillon Exp $
  30  */
  31
  32 #include <sys/param.h>
  33 #include <sys/systm.h>
  34 #include <sys/sysproto.h>
  35 #include <sys/proc.h>
  36 #include <sys/msg.h>
  37 #include <sys/sem.h>
  38 #include <sys/shm.h>
  39
  40 #include <arch_linux/linux.h>
  41 #include <machine/limits.h>
  42 #include <arch_linux/linux_proto.h>
  43 #include "linux_ipc.h"
  44 #include "linux_util.h"
  45
  46
  47 static void
  48 bsd_to_linux_shminfo( struct shminfo *bpp, struct l_shminfo *lpp)
  49 {
  50         lpp->shmmax = bpp->shmmax;
  51         lpp->shmmin = bpp->shmmin;
  52         lpp->shmmni = bpp->shmmni;
  53         lpp->shmseg = bpp->shmseg;
  54         lpp->shmall = bpp->shmall;
  55 }
  56
  57 #if 0
  58 static void
  59 bsd_to_linux_shm_info( struct shm_info *bpp, struct l_shm_info *lpp)
  60 {
  61         lpp->used_ids = bpp->used_ids ;
  62         lpp->shm_tot = bpp->shm_tot ;
  63         lpp->shm_rss = bpp->shm_rss ;
  64         lpp->shm_swp = bpp->shm_swp ;
  65         lpp->swap_attempts = bpp->swap_attempts ;
  66         lpp->swap_successes = bpp->swap_successes ;
  67 }
  68 #endif
  69
  70 /*
  71  * MPSAFE
  72  */
  73 static void
  74 linux_to_bsd_ipc_perm(struct l_ipc_perm *lpp, struct ipc_perm *bpp)
  75 {
  76     bpp->key = lpp->key;
  77     bpp->uid = lpp->uid;
  78     bpp->gid = lpp->gid;
  79     bpp->cuid = lpp->cuid;
  80     bpp->cgid = lpp->cgid;
  81     bpp->mode = lpp->mode;
  82     bpp->seq = lpp->seq;
  83 }
  84
  85 /*
  86  * MPSAFE
  87  */
  88 static void
  89 bsd_to_linux_ipc_perm(struct ipc_perm *bpp, struct l_ipc_perm *lpp)
  90 {
  91     lpp->key = bpp->key;
  92     lpp->uid = bpp->uid;
  93     lpp->gid = bpp->gid;
  94     lpp->cuid = bpp->cuid;
  95     lpp->cgid = bpp->cgid;
  96     lpp->mode = bpp->mode;
  97     lpp->seq = bpp->seq;
  98 }
  99
 100 /*
 101  * MPSAFE
 102  */
 103 static void
 104 linux_to_bsd_semid_ds(struct l_semid_ds *lsp, struct semid_ds *bsp)
 105 {
 106     linux_to_bsd_ipc_perm(&lsp->sem_perm, &bsp->sem_perm);
 107     bsp->sem_otime = lsp->sem_otime;
 108     bsp->sem_ctime = lsp->sem_ctime;
 109     bsp->sem_nsems = lsp->sem_nsems;
 110     bsp->sem_base = lsp->sem_base;
 111 }
 112
 113 /*
 114  * MPSAFE
 115  */
 116 static void
 117 bsd_to_linux_semid_ds(struct semid_ds *bsp, struct l_semid_ds *lsp)
 118 {
 119         bsd_to_linux_ipc_perm(&bsp->sem_perm, &lsp->sem_perm);
 120         lsp->sem_otime = bsp->sem_otime;
 121         lsp->sem_ctime = bsp->sem_ctime;
 122         lsp->sem_nsems = bsp->sem_nsems;
 123         lsp->sem_base = bsp->sem_base;
 124 }
 125
 126 /*
 127  * MPSAFE
 128  */
 129 static void
 130 linux_to_bsd_shmid_ds(struct l_shmid_ds *lsp, struct shmid_ds *bsp)
 131 {
 132     linux_to_bsd_ipc_perm(&lsp->shm_perm, &bsp->shm_perm);
 133     bsp->shm_segsz = lsp->shm_segsz;
 134     bsp->shm_lpid = lsp->shm_lpid;
 135     bsp->shm_cpid = lsp->shm_cpid;
 136     bsp->shm_nattch = lsp->shm_nattch;
 137     bsp->shm_atime = lsp->shm_atime;
 138     bsp->shm_dtime = lsp->shm_dtime;
 139     bsp->shm_ctime = lsp->shm_ctime;
 140 }
 141
 142 /*
 143  * MPSAFE
 144  */
 145 static void
 146 bsd_to_linux_shmid_ds(struct shmid_ds *bsp, struct l_shmid_ds *lsp)
 147 {
 148     bsd_to_linux_ipc_perm(&bsp->shm_perm, &lsp->shm_perm);
 149     if (bsp->shm_segsz > INT_MAX)
 150             lsp->shm_segsz = INT_MAX;
 151     else
 152             lsp->shm_segsz = bsp->shm_segsz;
 153     lsp->shm_lpid = bsp->shm_lpid;
 154     lsp->shm_cpid = bsp->shm_cpid;
 155     lsp->shm_nattch = bsp->shm_nattch;
 156     lsp->shm_atime = bsp->shm_atime;
 157     lsp->shm_dtime = bsp->shm_dtime;
 158     lsp->shm_ctime = bsp->shm_ctime;
 159     lsp->private3 = 0;
 160 }
 161
 162 static void
 163 linux_to_bsd_msqid_ds(struct l_msqid_ds *lsp, struct msqid_ds *bsp)
 164 {
 165     linux_to_bsd_ipc_perm(&lsp->msg_perm, &bsp->msg_perm);
 166     bsp->msg_cbytes = lsp->msg_cbytes;
 167     bsp->msg_qnum = lsp->msg_qnum;
 168     bsp->msg_qbytes = lsp->msg_qbytes;
 169     bsp->msg_lspid = lsp->msg_lspid;
 170     bsp->msg_lrpid = lsp->msg_lrpid;
 171     bsp->msg_stime = lsp->msg_stime;
 172     bsp->msg_rtime = lsp->msg_rtime;
 173     bsp->msg_ctime = lsp->msg_ctime;
 174 }
 175
 176 static void
 177 bsd_to_linux_msqid_ds(struct msqid_ds *bsp, struct l_msqid_ds *lsp)
 178 {
 179     bsd_to_linux_ipc_perm(&bsp->msg_perm, &lsp->msg_perm);
 180     lsp->msg_cbytes = bsp->msg_cbytes;
 181     lsp->msg_qnum = bsp->msg_qnum;
 182     lsp->msg_qbytes = bsp->msg_qbytes;
 183     lsp->msg_lspid = bsp->msg_lspid;
 184     lsp->msg_lrpid = bsp->msg_lrpid;
 185     lsp->msg_stime = bsp->msg_stime;
 186     lsp->msg_rtime = bsp->msg_rtime;
 187     lsp->msg_ctime = bsp->msg_ctime;
 188 }
 189
 190 static void
 191 linux_ipc_perm_to_ipc64_perm(struct l_ipc_perm *in, struct l_ipc64_perm *out)
 192 {
 193
 194         /* XXX: do we really need to do something here? */
 195         out->key = in->key;
 196         out->uid = in->uid;
 197         out->gid = in->gid;
 198         out->cuid = in->cuid;
 199         out->cgid = in->cgid;
 200         out->mode = in->mode;
 201         out->seq = in->seq;
 202 }
 203
 204 static int
 205 linux_msqid_pullup(l_int ver, struct l_msqid_ds *linux_msqid, caddr_t uaddr)
 206 {
 207         struct l_msqid64_ds linux_msqid64;
 208         int error;
 209
 210         if (ver == LINUX_IPC_64) {
 211                 error = copyin(uaddr, &linux_msqid64, sizeof(linux_msqid64));
 212                 if (error != 0)
 213                         return (error);
 214
 215                 bzero(linux_msqid, sizeof(*linux_msqid));
 216
 217                 linux_msqid->msg_perm.uid = linux_msqid64.msg_perm.uid;
 218                 linux_msqid->msg_perm.gid = linux_msqid64.msg_perm.gid;
 219                 linux_msqid->msg_perm.mode = linux_msqid64.msg_perm.mode;
 220
 221                 if (linux_msqid64.msg_qbytes > USHRT_MAX)
 222                         linux_msqid->msg_lqbytes = linux_msqid64.msg_qbytes;
 223                 else
 224                         linux_msqid->msg_qbytes = linux_msqid64.msg_qbytes;
 225         } else {
 226                 error = copyin(uaddr, linux_msqid, sizeof(*linux_msqid));
 227         }
 228         return (error);
 229 }
 230
 231 static int
 232 linux_msqid_pushdown(l_int ver, struct l_msqid_ds *linux_msqid, caddr_t uaddr)
 233 {
 234         struct l_msqid64_ds linux_msqid64;
 235
 236         if (ver == LINUX_IPC_64) {
 237                 bzero(&linux_msqid64, sizeof(linux_msqid64));
 238
 239                 linux_ipc_perm_to_ipc64_perm(&linux_msqid->msg_perm,
 240                     &linux_msqid64.msg_perm);
 241
 242                 linux_msqid64.msg_stime = linux_msqid->msg_stime;
 243                 linux_msqid64.msg_rtime = linux_msqid->msg_rtime;
 244                 linux_msqid64.msg_ctime = linux_msqid->msg_ctime;
 245
 246                 if (linux_msqid->msg_cbytes == 0)
 247                         linux_msqid64.msg_cbytes = linux_msqid->msg_lcbytes;
 248                 else
 249                         linux_msqid64.msg_cbytes = linux_msqid->msg_cbytes;
 250
 251                 linux_msqid64.msg_qnum = linux_msqid->msg_qnum;
 252
 253                 if (linux_msqid->msg_qbytes == 0)
 254                         linux_msqid64.msg_qbytes = linux_msqid->msg_lqbytes;
 255                 else
 256                         linux_msqid64.msg_qbytes = linux_msqid->msg_qbytes;
 257
 258                 linux_msqid64.msg_lspid = linux_msqid->msg_lspid;
 259                 linux_msqid64.msg_lrpid = linux_msqid->msg_lrpid;
 260
 261                 return (copyout(&linux_msqid64, uaddr, sizeof(linux_msqid64)));
 262         } else {
 263                 return (copyout(linux_msqid, uaddr, sizeof(*linux_msqid)));
 264         }
 265 }
 266
 267 static int
 268 linux_semid_pullup(l_int ver, struct l_semid_ds *linux_semid, caddr_t uaddr)
 269 {
 270         struct l_semid64_ds linux_semid64;
 271         int error;
 272
 273         if (ver == LINUX_IPC_64) {
 274                 error = copyin(uaddr, &linux_semid64, sizeof(linux_semid64));
 275                 if (error != 0)
 276                         return (error);
 277
 278                 bzero(linux_semid, sizeof(*linux_semid));
 279
 280                 linux_semid->sem_perm.uid = linux_semid64.sem_perm.uid;
 281                 linux_semid->sem_perm.gid = linux_semid64.sem_perm.gid;
 282                 linux_semid->sem_perm.mode = linux_semid64.sem_perm.mode;
 283         } else {
 284                 error = copyin(uaddr, linux_semid, sizeof(*linux_semid));
 285         }
 286         return (error);
 287 }
 288
 289 static int
 290 linux_semid_pushdown(l_int ver, struct l_semid_ds *linux_semid, caddr_t uaddr)
 291 {
 292         struct l_semid64_ds linux_semid64;
 293
 294         if (ver == LINUX_IPC_64) {
 295                 bzero(&linux_semid64, sizeof(linux_semid64));
 296
 297                 linux_ipc_perm_to_ipc64_perm(&linux_semid->sem_perm,
 298                     &linux_semid64.sem_perm);
 299
 300                 linux_semid64.sem_otime = linux_semid->sem_otime;
 301                 linux_semid64.sem_ctime = linux_semid->sem_ctime;
 302                 linux_semid64.sem_nsems = linux_semid->sem_nsems;
 303
 304                 return (copyout(&linux_semid64, uaddr, sizeof(linux_semid64)));
 305         } else {
 306                 return (copyout(linux_semid, uaddr, sizeof(*linux_semid)));
 307         }
 308 }
 309
 310 static int
 311 linux_shmid_pullup(l_int ver, struct l_shmid_ds *linux_shmid, caddr_t uaddr)
 312 {
 313         struct l_shmid64_ds linux_shmid64;
 314         int error;
 315
 316         if (ver == LINUX_IPC_64) {
 317                 error = copyin(uaddr, &linux_shmid64, sizeof(linux_shmid64));
 318                 if (error != 0)
 319                         return (error);
 320
 321                 bzero(linux_shmid, sizeof(*linux_shmid));
 322
 323                 linux_shmid->shm_perm.uid = linux_shmid64.shm_perm.uid;
 324                 linux_shmid->shm_perm.gid = linux_shmid64.shm_perm.gid;
 325                 linux_shmid->shm_perm.mode = linux_shmid64.shm_perm.mode;
 326         } else {
 327                 error = copyin(uaddr, linux_shmid, sizeof(*linux_shmid));
 328         }
 329         return (error);
 330 }
 331
 332 static int
 333 linux_shmid_pushdown(l_int ver, struct l_shmid_ds *linux_shmid, caddr_t uaddr)
 334 {
 335         struct l_shmid64_ds linux_shmid64;
 336
 337         /*
 338          * XXX: This is backwards and loses information in shm_nattch
 339          * and shm_segsz.  We should probably either expose the BSD
 340          * shmid structure directly and convert it to either the
 341          * non-64 or 64 variant directly or the code should always
 342          * convert to the 64 variant and then truncate values into the
 343          * non-64 variant if needed since the 64 variant has more
 344          * precision.
 345          */
 346         if (ver == LINUX_IPC_64) {
 347                 bzero(&linux_shmid64, sizeof(linux_shmid64));
 348
 349                 linux_ipc_perm_to_ipc64_perm(&linux_shmid->shm_perm,
 350                     &linux_shmid64.shm_perm);
 351
 352                 linux_shmid64.shm_segsz = linux_shmid->shm_segsz;
 353                 linux_shmid64.shm_atime = linux_shmid->shm_atime;
 354                 linux_shmid64.shm_dtime = linux_shmid->shm_dtime;
 355                 linux_shmid64.shm_ctime = linux_shmid->shm_ctime;
 356                 linux_shmid64.shm_cpid = linux_shmid->shm_cpid;
 357                 linux_shmid64.shm_lpid = linux_shmid->shm_lpid;
 358                 linux_shmid64.shm_nattch = linux_shmid->shm_nattch;
 359
 360                 return (copyout(&linux_shmid64, uaddr, sizeof(linux_shmid64)));
 361         } else {
 362                 return (copyout(linux_shmid, uaddr, sizeof(*linux_shmid)));
 363         }
 364 }
 365
 366 static int
 367 linux_shminfo_pushdown(l_int ver, struct l_shminfo *linux_shminfo,
 368     caddr_t uaddr)
 369 {
 370         struct l_shminfo64 linux_shminfo64;
 371
 372         if (ver == LINUX_IPC_64) {
 373                 bzero(&linux_shminfo64, sizeof(linux_shminfo64));
 374
 375                 linux_shminfo64.shmmax = linux_shminfo->shmmax;
 376                 linux_shminfo64.shmmin = linux_shminfo->shmmin;
 377                 linux_shminfo64.shmmni = linux_shminfo->shmmni;
 378                 linux_shminfo64.shmseg = linux_shminfo->shmseg;
 379                 linux_shminfo64.shmall = linux_shminfo->shmall;
 380
 381                 return (copyout(&linux_shminfo64, uaddr,
 382                     sizeof(linux_shminfo64)));
 383         } else {
 384                 return (copyout(linux_shminfo, uaddr, sizeof(*linux_shminfo)));
 385         }
 386 }
 387
 388 /*
 389  * MPSAFE
 390  */
 391 int
 392 linux_semop(struct linux_semop_args *args)
 393 {
 394         struct semop_args bsd_args;
 395         int error;
 396
 397         bsd_args.sysmsg_result = 0;
 398         bsd_args.semid = args->semid;
 399         bsd_args.sops = (struct sembuf *)args->tsops;
 400         bsd_args.nsops = args->nsops;
 401         error = sys_semop(&bsd_args);
 402         args->sysmsg_result = bsd_args.sysmsg_result;
 403         return(error);
 404 }
 405
 406 /*
 407  * MPSAFE
 408  */
 409 int
 410 linux_semget(struct linux_semget_args *args)
 411 {
 412         struct semget_args bsd_args;
 413         int error;
 414
 415         bsd_args.sysmsg_result = 0;
 416         bsd_args.key = args->key;
 417         bsd_args.nsems = args->nsems;
 418         bsd_args.semflg = args->semflg;
 419         error = sys_semget(&bsd_args);
 420         args->sysmsg_result = bsd_args.sysmsg_result;
 421         return(error);
 422 }
 423
 424 /*
 425  * MPSAFE
 426  */
 427 int
 428 linux_semctl(struct linux_semctl_args *args)
 429 {
 430         struct l_semid_ds linux_semid;
 431         struct __semctl_args bsd_args;
 432         struct l_seminfo linux_seminfo;
 433         int error;
 434         union semun *unptr;
 435         caddr_t sg;
 436
 437         sg = stackgap_init();
 438
 439         /* Make sure the arg parameter can be copied in. */
 440         unptr = stackgap_alloc(&sg, sizeof(union semun));
 441         bcopy(&args->arg, unptr, sizeof(union semun));
 442
 443         bsd_args.sysmsg_result = 0;
 444         bsd_args.semid = args->semid;
 445         bsd_args.semnum = args->semnum;
 446         bsd_args.arg = unptr;
 447
 448         switch (args->cmd & ~LINUX_IPC_64) {
 449         case LINUX_IPC_RMID:
 450                 bsd_args.cmd = IPC_RMID;
 451                 break;
 452         case LINUX_GETNCNT:
 453                 bsd_args.cmd = GETNCNT;
 454                 break;
 455         case LINUX_GETPID:
 456                 bsd_args.cmd = GETPID;
 457                 break;
 458         case LINUX_GETVAL:
 459                 bsd_args.cmd = GETVAL;
 460                 break;
 461         case LINUX_GETZCNT:
 462                 bsd_args.cmd = GETZCNT;
 463                 break;
 464         case LINUX_SETVAL:
 465                 bsd_args.cmd = SETVAL;
 466                 break;
 467         case LINUX_IPC_SET:
 468                 bsd_args.cmd = IPC_SET;
 469                 error = linux_semid_pullup(args->cmd & LINUX_IPC_64,
 470                     &linux_semid, (caddr_t)args->arg.buf);
 471                 if (error)
 472                         return (error);
 473                 unptr->buf = stackgap_alloc(&sg, sizeof(struct semid_ds));
 474                 linux_to_bsd_semid_ds(&linux_semid, unptr->buf);
 475                 break;
 476         case LINUX_IPC_STAT:
 477         case LINUX_SEM_STAT:
 478                 if ((args->cmd & ~LINUX_IPC_64) == LINUX_IPC_STAT)
 479                         bsd_args.cmd = IPC_STAT;
 480                 else
 481                         bsd_args.cmd = SEM_STAT;
 482                 unptr->buf = stackgap_alloc(&sg, sizeof(struct semid_ds));
 483                 error = sys___semctl(&bsd_args);
 484                 if (error)
 485                         return error;
 486                 args->sysmsg_result = IXSEQ_TO_IPCID(bsd_args.semid,
 487                                                         unptr->buf->sem_perm);
 488                 bsd_to_linux_semid_ds(unptr->buf, &linux_semid);
 489                 error = linux_semid_pushdown(args->cmd & LINUX_IPC_64,
 490                     &linux_semid, (caddr_t)(args->arg.buf));
 491                 if (error == 0)
 492                         args->sysmsg_iresult = ((args->cmd & ~LINUX_IPC_64) == SEM_STAT)
 493                             ? bsd_args.sysmsg_result : 0;
 494                 return (error);
 495         case LINUX_IPC_INFO:
 496         case LINUX_SEM_INFO:
 497                 error = copyin((caddr_t)args->arg.buf, &linux_seminfo,
 498                                                 sizeof(linux_seminfo) );
 499                 if (error)
 500                         return error;
 501                 bcopy(&seminfo, &linux_seminfo, sizeof(linux_seminfo) );
 502 /* XXX BSD equivalent?
 503 #define used_semids 10
 504 #define used_sems 10
 505                 linux_seminfo.semusz = used_semids;
 506                 linux_seminfo.semaem = used_sems;
 507 */
 508                 error = copyout((caddr_t)&linux_seminfo, (caddr_t)args->arg.buf,
 509                                                 sizeof(linux_seminfo) );
 510                 if (error)
 511                         return error;
 512                 args->sysmsg_result = seminfo.semmni;
 513                 return 0;                       /* No need for __semctl call */
 514         case LINUX_GETALL:
 515                 bsd_args.cmd = GETALL;
 516                 break;
 517         case LINUX_SETALL:
 518                 bsd_args.cmd = SETALL;
 519                 break;
 520         default:
 521                 uprintf("linux: 'ipc' type=%d not implemented\n", args->cmd & ~LINUX_IPC_64);
 522                 return EINVAL;
 523         }
 524         error = sys___semctl(&bsd_args);
 525         args->sysmsg_result = bsd_args.sysmsg_result;
 526         return(error);
 527 }
 528
 529 /*
 530  * MPSAFE
 531  */
 532 int
 533 linux_msgsnd(struct linux_msgsnd_args *args)
 534 {
 535     struct msgsnd_args bsd_args;
 536     int error;
 537
 538     if ((l_long)args->msgsz < 0 || args->msgsz > (l_long)msginfo.msgmax)
 539         return (EINVAL);
 540     bsd_args.sysmsg_result = 0;
 541     bsd_args.msqid = args->msqid;
 542     bsd_args.msgp = args->msgp;
 543     bsd_args.msgsz = args->msgsz;
 544     bsd_args.msgflg = args->msgflg;
 545     error = sys_msgsnd(&bsd_args);
 546     args->sysmsg_result = bsd_args.sysmsg_result;
 547     return(error);
 548 }
 549
 550 /*
 551  * MPSAFE
 552  */
 553 int
 554 linux_msgrcv(struct linux_msgrcv_args *args)
 555 {
 556     struct msgrcv_args bsd_args;
 557     int error;
 558     if ((l_long)args->msgsz < 0 || args->msgsz > (l_long)msginfo.msgmax)
 559             return (EINVAL);
 560     bsd_args.sysmsg_result = 0;
 561     bsd_args.msqid = args->msqid;
 562     bsd_args.msgp = args->msgp;
 563     bsd_args.msgsz = args->msgsz;
 564     bsd_args.msgtyp = 0; /* XXX - args->msgtyp; */
 565     bsd_args.msgflg = args->msgflg;
 566     error = sys_msgrcv(&bsd_args);
 567     args->sysmsg_result = bsd_args.sysmsg_result;
 568     return(error);
 569 }
 570
 571 /*
 572  * MPSAFE
 573  */
 574 int
 575 linux_msgget(struct linux_msgget_args *args)
 576 {
 577     struct msgget_args bsd_args;
 578     int error;
 579
 580     bsd_args.sysmsg_result = 0;
 581     bsd_args.key = args->key;
 582     bsd_args.msgflg = args->msgflg;
 583     error = sys_msgget(&bsd_args);
 584     args->sysmsg_result = bsd_args.sysmsg_result;
 585     return(error);
 586 }
 587
 588 /*
 589  * MPSAFE
 590  */
 591 int
 592 linux_msgctl(struct linux_msgctl_args *args)
 593 {
 594     struct msgctl_args bsd_args;
 595     struct l_msqid_ds linux_msqid;
 596     int error, bsd_cmd;
 597     struct msqid_ds *unptr;
 598     caddr_t sg;
 599
 600    sg = stackgap_init();
 601         /* Make sure the arg parameter can be copied in. */
 602         unptr = stackgap_alloc(&sg, sizeof(struct msqid_ds));
 603         bcopy(&args->buf, unptr, sizeof(struct msqid_ds));
 604
 605     bsd_cmd = args->cmd & ~LINUX_IPC_64;
 606     bsd_args.sysmsg_result = 0;
 607     bsd_args.msqid = args->msqid;
 608     bsd_args.cmd = bsd_cmd;
 609     bsd_args.buf = unptr;
 610     switch(bsd_cmd) {
 611     case LINUX_IPC_INFO:
 612     case LINUX_MSG_INFO: {
 613         struct l_msginfo linux_msginfo;
 614
 615         /*
 616          * XXX MSG_INFO uses the same data structure but returns different
 617          * dynamic counters in msgpool, msgmap, and msgtql fields.
 618          */
 619         linux_msginfo.msgpool = (long)msginfo.msgmni *
 620             (long)msginfo.msgmnb / 1024L;       /* XXX MSG_INFO. */
 621         linux_msginfo.msgmap = msginfo.msgmnb;  /* XXX MSG_INFO. */
 622         linux_msginfo.msgmax = msginfo.msgmax;
 623         linux_msginfo.msgmnb = msginfo.msgmnb;
 624         linux_msginfo.msgmni = msginfo.msgmni;
 625         linux_msginfo.msgssz = msginfo.msgssz;
 626         linux_msginfo.msgtql = msginfo.msgtql;  /* XXX MSG_INFO. */
 627         linux_msginfo.msgseg = msginfo.msgseg;
 628         error = copyout(&linux_msginfo, PTRIN(args->buf),
 629             sizeof(linux_msginfo));
 630         if (error == 0)
 631             args->sysmsg_iresult = msginfo.msgmni;      /* XXX */
 632
 633         return (error);
 634     }
 635
 636 /*
 637  * TODO: implement this
 638  * case LINUX_MSG_STAT:
 639  */
 640     case LINUX_IPC_STAT:
 641         /* NOTHING */
 642         break;
 643
 644     case LINUX_IPC_SET:
 645         error = linux_msqid_pullup(args->cmd & LINUX_IPC_64,
 646             &linux_msqid, (caddr_t)(args->buf));
 647         if (error)
 648             return (error);
 649         linux_to_bsd_msqid_ds(&linux_msqid, unptr);
 650         break;
 651
 652     case LINUX_IPC_RMID:
 653         /* NOTHING */
 654         break;
 655
 656     default:
 657         return (EINVAL);
 658         break;
 659     }
 660
 661     error = sys_msgctl(&bsd_args);
 662     if (error != 0)
 663         if (bsd_cmd != LINUX_IPC_RMID || error != EINVAL)
 664             return (error);
 665     if (bsd_cmd == LINUX_IPC_STAT) {
 666         bsd_to_linux_msqid_ds(bsd_args.buf, &linux_msqid);
 667         return (linux_msqid_pushdown(args->cmd & LINUX_IPC_64,
 668           &linux_msqid, PTRIN(args->buf)));
 669     }
 670     args->sysmsg_result = bsd_args.sysmsg_result;
 671     return ((args->cmd == LINUX_IPC_RMID && error == EINVAL) ? 0 : error);
 672
 673
 674
 675
 676 }
 677
 678 /*
 679  * MPSAFE
 680  */
 681 int
 682 linux_shmat(struct linux_shmat_args *args)
 683 {
 684     struct shmat_args bsd_args;
 685     int error;
 686
 687     bsd_args.sysmsg_result = 0;
 688     bsd_args.shmid = args->shmid;
 689     bsd_args.shmaddr = args->shmaddr;
 690     bsd_args.shmflg = args->shmflg;
 691     if ((error = sys_shmat(&bsd_args)))
 692         return error;
 693 #ifdef __i386__
 694     if ((error = copyout(&bsd_args.sysmsg_lresult, (caddr_t)args->raddr, sizeof(l_ulong))))
 695         return error;
 696     args->sysmsg_result = 0;
 697 #else
 698     args->sysmsg_result = bsd_args.sysmsg_result;
 699 #endif
 700     return 0;
 701 }
 702
 703 /*
 704  * MPSAFE
 705  */
 706 int
 707 linux_shmdt(struct linux_shmdt_args *args)
 708 {
 709     struct shmdt_args bsd_args;
 710     int error;
 711
 712     bsd_args.sysmsg_result = 0;
 713     bsd_args.shmaddr = args->shmaddr;
 714     error = sys_shmdt(&bsd_args);
 715     args->sysmsg_result = bsd_args.sysmsg_result;
 716     return(error);
 717 }
 718
 719 /*
 720  * MPSAFE
 721  */
 722 int
 723 linux_shmget(struct linux_shmget_args *args)
 724 {
 725     struct shmget_args bsd_args;
 726     int error;
 727
 728     bsd_args.sysmsg_result = 0;
 729     bsd_args.key = args->key;
 730     bsd_args.size = args->size;
 731     bsd_args.shmflg = args->shmflg;
 732     error = sys_shmget(&bsd_args);
 733     args->sysmsg_result = bsd_args.sysmsg_result;
 734     return(error);
 735 }
 736
 737 /*
 738  * MPSAFE
 739  */
 740 extern int shm_nused;
 741 int
 742 linux_shmctl(struct linux_shmctl_args *args)
 743 {
 744     struct l_shmid_ds linux_shmid;
 745     struct l_shminfo linux_shminfo;
 746     struct l_shm_info linux_shm_info;
 747     struct shmctl_args bsd_args;
 748     int error;
 749     caddr_t sg = stackgap_init();
 750
 751     bsd_args.sysmsg_result = 0;
 752     switch (args->cmd & ~LINUX_IPC_64) {
 753     case LINUX_IPC_STAT:
 754     case LINUX_SHM_STAT:
 755         bsd_args.shmid = args->shmid;
 756         bsd_args.cmd = IPC_STAT;
 757         bsd_args.buf = (struct shmid_ds*)stackgap_alloc(&sg, sizeof(struct shmid_ds));
 758         if ((error = sys_shmctl(&bsd_args)))
 759             return error;
 760         bsd_to_linux_shmid_ds(bsd_args.buf, &linux_shmid);
 761         args->sysmsg_result = bsd_args.sysmsg_result;
 762         return (linux_shmid_pushdown(args->cmd & LINUX_IPC_64,
 763              &linux_shmid, PTRIN(args->buf)));
 764
 765     case LINUX_IPC_SET:
 766         if ((error = linux_shmid_pullup(args->cmd & LINUX_IPC_64,
 767           &linux_shmid, PTRIN(args->buf))))
 768             return error;
 769         bsd_args.buf = (struct shmid_ds*)stackgap_alloc(&sg, sizeof(struct shmid_ds));
 770         linux_to_bsd_shmid_ds(&linux_shmid, bsd_args.buf);
 771         bsd_args.shmid = args->shmid;
 772         bsd_args.cmd = IPC_SET;
 773         break;
 774     case LINUX_IPC_RMID:
 775         bsd_args.shmid = args->shmid;
 776         bsd_args.cmd = IPC_RMID;
 777         if (args->buf == NULL)
 778             bsd_args.buf = NULL;
 779         else {
 780             if ((error = linux_shmid_pullup(args->cmd & LINUX_IPC_64,
 781                     &linux_shmid, PTRIN(args->buf))))
 782                 return error;
 783             bsd_args.buf = (struct shmid_ds*)stackgap_alloc(&sg, sizeof(struct shmid_ds));
 784             linux_to_bsd_shmid_ds(&linux_shmid, bsd_args.buf);
 785         }
 786         break;
 787     case LINUX_IPC_INFO:
 788         bsd_to_linux_shminfo(&shminfo, &linux_shminfo);
 789         return (linux_shminfo_pushdown(args->cmd & LINUX_IPC_64,
 790             &linux_shminfo, PTRIN(args->buf)));
 791         break;
 792     case LINUX_SHM_INFO:
 793         linux_shm_info.used_ids = shm_nused;
 794         linux_shm_info.shm_tot = 0;
 795         linux_shm_info.shm_rss = 0;
 796         linux_shm_info.shm_swp = 0;
 797         linux_shm_info.swap_attempts = 0;
 798         linux_shm_info.swap_successes = 0;
 799         return copyout(&linux_shm_info, PTRIN(args->buf),
 800             sizeof(struct l_shm_info));
 801
 802     case LINUX_SHM_LOCK:
 803     case LINUX_SHM_UNLOCK:
 804     default:
 805         uprintf("linux: 'ipc' type=%d not implemented\n", args->cmd & ~LINUX_IPC_64);
 806         return EINVAL;
 807     }
 808     error = sys_shmctl(&bsd_args);
 809     args->sysmsg_result = bsd_args.sysmsg_result;
 810     return(error);
 811 }