sys/compat/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 without 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
  29 #include <sys/cdefs.h>
  30 __FBSDID("$FreeBSD$");
  31
  32 #include <sys/param.h>
  33 #include <sys/systm.h>
  34 #include <sys/syscallsubr.h>
  35 #include <sys/sysproto.h>
  36 #include <sys/proc.h>
  37 #include <sys/limits.h>
  38 #include <sys/msg.h>
  39 #include <sys/sem.h>
  40 #include <sys/shm.h>
  41
  42 #include "opt_compat.h"
  43
  44 #ifdef COMPAT_LINUX32
  45 #include <machine/../linux32/linux.h>
  46 #include <machine/../linux32/linux32_proto.h>
  47 #include <machine/../linux32/linux32_ipc64.h>
  48 #else
  49 #include <machine/../linux/linux.h>
  50 #include <machine/../linux/linux_proto.h>
  51 #include <machine/../linux/linux_ipc64.h>
  52 #endif
  53 #include <compat/linux/linux_ipc.h>
  54 #include <compat/linux/linux_util.h>
  55
  56 struct l_seminfo {
  57         l_int semmap;
  58         l_int semmni;
  59         l_int semmns;
  60         l_int semmnu;
  61         l_int semmsl;
  62         l_int semopm;
  63         l_int semume;
  64         l_int semusz;
  65         l_int semvmx;
  66         l_int semaem;
  67 };
  68
  69 struct l_shminfo {
  70         l_int shmmax;
  71         l_int shmmin;
  72         l_int shmmni;
  73         l_int shmseg;
  74         l_int shmall;
  75 };
  76
  77 struct l_shm_info {
  78         l_int used_ids;
  79         l_ulong shm_tot;  /* total allocated shm */
  80         l_ulong shm_rss;  /* total resident shm */
  81         l_ulong shm_swp;  /* total swapped shm */
  82         l_ulong swap_attempts;
  83         l_ulong swap_successes;
  84 };
  85
  86 struct l_msginfo {
  87         l_int msgpool;
  88         l_int msgmap;
  89         l_int msgmax;
  90         l_int msgmnb;
  91         l_int msgmni;
  92         l_int msgssz;
  93         l_int msgtql;
  94         l_ushort msgseg;
  95 };
  96
  97 static void
  98 bsd_to_linux_shminfo( struct shminfo *bpp, struct l_shminfo *lpp)
  99 {
 100         lpp->shmmax = bpp->shmmax;
 101         lpp->shmmin = bpp->shmmin;
 102         lpp->shmmni = bpp->shmmni;
 103         lpp->shmseg = bpp->shmseg;
 104         lpp->shmall = bpp->shmall;
 105 }
 106
 107 static void
 108 bsd_to_linux_shm_info( struct shm_info *bpp, struct l_shm_info *lpp)
 109 {
 110         lpp->used_ids = bpp->used_ids ;
 111         lpp->shm_tot = bpp->shm_tot ;
 112         lpp->shm_rss = bpp->shm_rss ;
 113         lpp->shm_swp = bpp->shm_swp ;
 114         lpp->swap_attempts = bpp->swap_attempts ;
 115         lpp->swap_successes = bpp->swap_successes ;
 116 }
 117
 118 struct l_ipc_perm {
 119         l_key_t         key;
 120         l_uid16_t       uid;
 121         l_gid16_t       gid;
 122         l_uid16_t       cuid;
 123         l_gid16_t       cgid;
 124         l_ushort        mode;
 125         l_ushort        seq;
 126 };
 127
 128 static void
 129 linux_to_bsd_ipc_perm(struct l_ipc_perm *lpp, struct ipc_perm *bpp)
 130 {
 131     bpp->key = lpp->key;
 132     bpp->uid = lpp->uid;
 133     bpp->gid = lpp->gid;
 134     bpp->cuid = lpp->cuid;
 135     bpp->cgid = lpp->cgid;
 136     bpp->mode = lpp->mode;
 137     bpp->seq = lpp->seq;
 138 }
 139
 140
 141 static void
 142 bsd_to_linux_ipc_perm(struct ipc_perm *bpp, struct l_ipc_perm *lpp)
 143 {
 144     lpp->key = bpp->key;
 145     lpp->uid = bpp->uid;
 146     lpp->gid = bpp->gid;
 147     lpp->cuid = bpp->cuid;
 148     lpp->cgid = bpp->cgid;
 149     lpp->mode = bpp->mode;
 150     lpp->seq = bpp->seq;
 151 }
 152
 153 struct l_msqid_ds {
 154         struct l_ipc_perm       msg_perm;
 155         l_uintptr_t             msg_first;      /* first message on queue,unused */
 156         l_uintptr_t             msg_last;       /* last message in queue,unused */
 157         l_time_t                msg_stime;      /* last msgsnd time */
 158         l_time_t                msg_rtime;      /* last msgrcv time */
 159         l_time_t                msg_ctime;      /* last change time */
 160         l_ulong                 msg_lcbytes;    /* Reuse junk fields for 32 bit */
 161         l_ulong                 msg_lqbytes;    /* ditto */
 162         l_ushort                msg_cbytes;     /* current number of bytes on queue */
 163         l_ushort                msg_qnum;       /* number of messages in queue */
 164         l_ushort                msg_qbytes;     /* max number of bytes on queue */
 165         l_pid_t                 msg_lspid;      /* pid of last msgsnd */
 166         l_pid_t                 msg_lrpid;      /* last receive pid */
 167 }
 168 #if defined(__amd64__) && defined(COMPAT_LINUX32)
 169 __packed
 170 #endif
 171 ;
 172
 173 struct l_semid_ds {
 174         struct l_ipc_perm       sem_perm;
 175         l_time_t                sem_otime;
 176         l_time_t                sem_ctime;
 177         l_uintptr_t             sem_base;
 178         l_uintptr_t             sem_pending;
 179         l_uintptr_t             sem_pending_last;
 180         l_uintptr_t             undo;
 181         l_ushort                sem_nsems;
 182 }
 183 #if defined(__amd64__) && defined(COMPAT_LINUX32)
 184 __packed
 185 #endif
 186 ;
 187
 188 struct l_shmid_ds {
 189         struct l_ipc_perm       shm_perm;
 190         l_int                   shm_segsz;
 191         l_time_t                shm_atime;
 192         l_time_t                shm_dtime;
 193         l_time_t                shm_ctime;
 194         l_ushort                shm_cpid;
 195         l_ushort                shm_lpid;
 196         l_short                 shm_nattch;
 197         l_ushort                private1;
 198         l_uintptr_t             private2;
 199         l_uintptr_t             private3;
 200 };
 201
 202 static void
 203 linux_to_bsd_semid_ds(struct l_semid_ds *lsp, struct semid_ds *bsp)
 204 {
 205     linux_to_bsd_ipc_perm(&lsp->sem_perm, &bsp->sem_perm);
 206     bsp->sem_otime = lsp->sem_otime;
 207     bsp->sem_ctime = lsp->sem_ctime;
 208     bsp->sem_nsems = lsp->sem_nsems;
 209     bsp->sem_base = PTRIN(lsp->sem_base);
 210 }
 211
 212 static void
 213 bsd_to_linux_semid_ds(struct semid_ds *bsp, struct l_semid_ds *lsp)
 214 {
 215         bsd_to_linux_ipc_perm(&bsp->sem_perm, &lsp->sem_perm);
 216         lsp->sem_otime = bsp->sem_otime;
 217         lsp->sem_ctime = bsp->sem_ctime;
 218         lsp->sem_nsems = bsp->sem_nsems;
 219         lsp->sem_base = PTROUT(bsp->sem_base);
 220 }
 221
 222 static void
 223 linux_to_bsd_shmid_ds(struct l_shmid_ds *lsp, struct shmid_ds *bsp)
 224 {
 225     linux_to_bsd_ipc_perm(&lsp->shm_perm, &bsp->shm_perm);
 226     bsp->shm_segsz = lsp->shm_segsz;
 227     bsp->shm_lpid = lsp->shm_lpid;
 228     bsp->shm_cpid = lsp->shm_cpid;
 229     bsp->shm_nattch = lsp->shm_nattch;
 230     bsp->shm_atime = lsp->shm_atime;
 231     bsp->shm_dtime = lsp->shm_dtime;
 232     bsp->shm_ctime = lsp->shm_ctime;
 233     /* this goes (yet) SOS */
 234     bsp->shm_internal = PTRIN(lsp->private3);
 235 }
 236
 237 static void
 238 bsd_to_linux_shmid_ds(struct shmid_ds *bsp, struct l_shmid_ds *lsp)
 239 {
 240     bsd_to_linux_ipc_perm(&bsp->shm_perm, &lsp->shm_perm);
 241     lsp->shm_segsz = bsp->shm_segsz;
 242     lsp->shm_lpid = bsp->shm_lpid;
 243     lsp->shm_cpid = bsp->shm_cpid;
 244     lsp->shm_nattch = bsp->shm_nattch;
 245     lsp->shm_atime = bsp->shm_atime;
 246     lsp->shm_dtime = bsp->shm_dtime;
 247     lsp->shm_ctime = bsp->shm_ctime;
 248     /* this goes (yet) SOS */
 249     lsp->private3 = PTROUT(bsp->shm_internal);
 250 }
 251
 252 static void
 253 linux_to_bsd_msqid_ds(struct l_msqid_ds *lsp, struct msqid_ds *bsp)
 254 {
 255     linux_to_bsd_ipc_perm(&lsp->msg_perm, &bsp->msg_perm);
 256     bsp->msg_cbytes = lsp->msg_cbytes;
 257     bsp->msg_qnum = lsp->msg_qnum;
 258     bsp->msg_qbytes = lsp->msg_qbytes;
 259     bsp->msg_lspid = lsp->msg_lspid;
 260     bsp->msg_lrpid = lsp->msg_lrpid;
 261     bsp->msg_stime = lsp->msg_stime;
 262     bsp->msg_rtime = lsp->msg_rtime;
 263     bsp->msg_ctime = lsp->msg_ctime;
 264 }
 265
 266 static void
 267 bsd_to_linux_msqid_ds(struct msqid_ds *bsp, struct l_msqid_ds *lsp)
 268 {
 269     bsd_to_linux_ipc_perm(&bsp->msg_perm, &lsp->msg_perm);
 270     lsp->msg_cbytes = bsp->msg_cbytes;
 271     lsp->msg_qnum = bsp->msg_qnum;
 272     lsp->msg_qbytes = bsp->msg_qbytes;
 273     lsp->msg_lspid = bsp->msg_lspid;
 274     lsp->msg_lrpid = bsp->msg_lrpid;
 275     lsp->msg_stime = bsp->msg_stime;
 276     lsp->msg_rtime = bsp->msg_rtime;
 277     lsp->msg_ctime = bsp->msg_ctime;
 278 }
 279
 280 static void
 281 linux_ipc_perm_to_ipc64_perm(struct l_ipc_perm *in, struct l_ipc64_perm *out)
 282 {
 283
 284         /* XXX: do we really need to do something here? */
 285         out->key = in->key;
 286         out->uid = in->uid;
 287         out->gid = in->gid;
 288         out->cuid = in->cuid;
 289         out->cgid = in->cgid;
 290         out->mode = in->mode;
 291         out->seq = in->seq;
 292 }
 293
 294 static int
 295 linux_msqid_pullup(l_int ver, struct l_msqid_ds *linux_msqid, caddr_t uaddr)
 296 {
 297         struct l_msqid64_ds linux_msqid64;
 298         int error;
 299
 300         if (ver == LINUX_IPC_64) {
 301                 error = copyin(uaddr, &linux_msqid64, sizeof(linux_msqid64));
 302                 if (error != 0)
 303                         return (error);
 304
 305                 bzero(linux_msqid, sizeof(*linux_msqid));
 306
 307                 linux_msqid->msg_perm.uid = linux_msqid64.msg_perm.uid;
 308                 linux_msqid->msg_perm.gid = linux_msqid64.msg_perm.gid;
 309                 linux_msqid->msg_perm.mode = linux_msqid64.msg_perm.mode;
 310
 311                 if (linux_msqid64.msg_qbytes > USHRT_MAX)
 312                         linux_msqid->msg_lqbytes = linux_msqid64.msg_qbytes;
 313                 else
 314                         linux_msqid->msg_qbytes = linux_msqid64.msg_qbytes;
 315         } else {
 316                 error = copyin(uaddr, linux_msqid, sizeof(*linux_msqid));
 317         }
 318         return (error);
 319 }
 320
 321 static int
 322 linux_msqid_pushdown(l_int ver, struct l_msqid_ds *linux_msqid, caddr_t uaddr)
 323 {
 324         struct l_msqid64_ds linux_msqid64;
 325
 326         if (ver == LINUX_IPC_64) {
 327                 bzero(&linux_msqid64, sizeof(linux_msqid64));
 328
 329                 linux_ipc_perm_to_ipc64_perm(&linux_msqid->msg_perm,
 330                     &linux_msqid64.msg_perm);
 331
 332                 linux_msqid64.msg_stime = linux_msqid->msg_stime;
 333                 linux_msqid64.msg_rtime = linux_msqid->msg_rtime;
 334                 linux_msqid64.msg_ctime = linux_msqid->msg_ctime;
 335
 336                 if (linux_msqid->msg_cbytes == 0)
 337                         linux_msqid64.msg_cbytes = linux_msqid->msg_lcbytes;
 338                 else
 339                         linux_msqid64.msg_cbytes = linux_msqid->msg_cbytes;
 340
 341                 linux_msqid64.msg_qnum = linux_msqid->msg_qnum;
 342
 343                 if (linux_msqid->msg_qbytes == 0)
 344                         linux_msqid64.msg_qbytes = linux_msqid->msg_lqbytes;
 345                 else
 346                         linux_msqid64.msg_qbytes = linux_msqid->msg_qbytes;
 347
 348                 linux_msqid64.msg_lspid = linux_msqid->msg_lspid;
 349                 linux_msqid64.msg_lrpid = linux_msqid->msg_lrpid;
 350
 351                 return (copyout(&linux_msqid64, uaddr, sizeof(linux_msqid64)));
 352         } else {
 353                 return (copyout(linux_msqid, uaddr, sizeof(*linux_msqid)));
 354         }
 355 }
 356
 357 static int
 358 linux_semid_pullup(l_int ver, struct l_semid_ds *linux_semid, caddr_t uaddr)
 359 {
 360         struct l_semid64_ds linux_semid64;
 361         int error;
 362
 363         if (ver == LINUX_IPC_64) {
 364                 error = copyin(uaddr, &linux_semid64, sizeof(linux_semid64));
 365                 if (error != 0)
 366                         return (error);
 367
 368                 bzero(linux_semid, sizeof(*linux_semid));
 369
 370                 linux_semid->sem_perm.uid = linux_semid64.sem_perm.uid;
 371                 linux_semid->sem_perm.gid = linux_semid64.sem_perm.gid;
 372                 linux_semid->sem_perm.mode = linux_semid64.sem_perm.mode;
 373         } else {
 374                 error = copyin(uaddr, linux_semid, sizeof(*linux_semid));
 375         }
 376         return (error);
 377 }
 378
 379 static int
 380 linux_semid_pushdown(l_int ver, struct l_semid_ds *linux_semid, caddr_t uaddr)
 381 {
 382         struct l_semid64_ds linux_semid64;
 383
 384         if (ver == LINUX_IPC_64) {
 385                 bzero(&linux_semid64, sizeof(linux_semid64));
 386
 387                 linux_ipc_perm_to_ipc64_perm(&linux_semid->sem_perm,
 388                     &linux_semid64.sem_perm);
 389
 390                 linux_semid64.sem_otime = linux_semid->sem_otime;
 391                 linux_semid64.sem_ctime = linux_semid->sem_ctime;
 392                 linux_semid64.sem_nsems = linux_semid->sem_nsems;
 393
 394                 return (copyout(&linux_semid64, uaddr, sizeof(linux_semid64)));
 395         } else {
 396                 return (copyout(linux_semid, uaddr, sizeof(*linux_semid)));
 397         }
 398 }
 399
 400 static int
 401 linux_shmid_pullup(l_int ver, struct l_shmid_ds *linux_shmid, caddr_t uaddr)
 402 {
 403         struct l_shmid64_ds linux_shmid64;
 404         int error;
 405
 406         if (ver == LINUX_IPC_64) {
 407                 error = copyin(uaddr, &linux_shmid64, sizeof(linux_shmid64));
 408                 if (error != 0)
 409                         return (error);
 410
 411                 bzero(linux_shmid, sizeof(*linux_shmid));
 412
 413                 linux_shmid->shm_perm.uid = linux_shmid64.shm_perm.uid;
 414                 linux_shmid->shm_perm.gid = linux_shmid64.shm_perm.gid;
 415                 linux_shmid->shm_perm.mode = linux_shmid64.shm_perm.mode;
 416         } else {
 417                 error = copyin(uaddr, linux_shmid, sizeof(*linux_shmid));
 418         }
 419         return (error);
 420 }
 421
 422 static int
 423 linux_shmid_pushdown(l_int ver, struct l_shmid_ds *linux_shmid, caddr_t uaddr)
 424 {
 425         struct l_shmid64_ds linux_shmid64;
 426
 427         if (ver == LINUX_IPC_64) {
 428                 bzero(&linux_shmid64, sizeof(linux_shmid64));
 429
 430                 linux_ipc_perm_to_ipc64_perm(&linux_shmid->shm_perm,
 431                     &linux_shmid64.shm_perm);
 432
 433                 linux_shmid64.shm_segsz = linux_shmid->shm_segsz;
 434                 linux_shmid64.shm_atime = linux_shmid->shm_atime;
 435                 linux_shmid64.shm_dtime = linux_shmid->shm_dtime;
 436                 linux_shmid64.shm_ctime = linux_shmid->shm_ctime;
 437                 linux_shmid64.shm_cpid = linux_shmid->shm_cpid;
 438                 linux_shmid64.shm_lpid = linux_shmid->shm_lpid;
 439                 linux_shmid64.shm_nattch = linux_shmid->shm_nattch;
 440
 441                 return (copyout(&linux_shmid64, uaddr, sizeof(linux_shmid64)));
 442         } else {
 443                 return (copyout(linux_shmid, uaddr, sizeof(*linux_shmid)));
 444         }
 445 }
 446
 447 static int
 448 linux_shminfo_pushdown(l_int ver, struct l_shminfo *linux_shminfo,
 449     caddr_t uaddr)
 450 {
 451         struct l_shminfo64 linux_shminfo64;
 452
 453         if (ver == LINUX_IPC_64) {
 454                 bzero(&linux_shminfo64, sizeof(linux_shminfo64));
 455
 456                 linux_shminfo64.shmmax = linux_shminfo->shmmax;
 457                 linux_shminfo64.shmmin = linux_shminfo->shmmin;
 458                 linux_shminfo64.shmmni = linux_shminfo->shmmni;
 459                 linux_shminfo64.shmseg = linux_shminfo->shmseg;
 460                 linux_shminfo64.shmall = linux_shminfo->shmall;
 461
 462                 return (copyout(&linux_shminfo64, uaddr,
 463                     sizeof(linux_shminfo64)));
 464         } else {
 465                 return (copyout(linux_shminfo, uaddr, sizeof(*linux_shminfo)));
 466         }
 467 }
 468
 469 int
 470 linux_semop(struct thread *td, struct linux_semop_args *args)
 471 {
 472         struct semop_args /* {
 473         int     semid;
 474         struct  sembuf *sops;
 475         int             nsops;
 476         } */ bsd_args;
 477
 478         bsd_args.semid = args->semid;
 479         bsd_args.sops = PTRIN(args->tsops);
 480         bsd_args.nsops = args->nsops;
 481         return semop(td, &bsd_args);
 482 }
 483
 484 int
 485 linux_semget(struct thread *td, struct linux_semget_args *args)
 486 {
 487         struct semget_args /* {
 488         key_t   key;
 489         int             nsems;
 490         int             semflg;
 491         } */ bsd_args;
 492
 493         if (args->nsems < 0)
 494                 return (EINVAL);
 495         bsd_args.key = args->key;
 496         bsd_args.nsems = args->nsems;
 497         bsd_args.semflg = args->semflg;
 498         return semget(td, &bsd_args);
 499 }
 500
 501 int
 502 linux_semctl(struct thread *td, struct linux_semctl_args *args)
 503 {
 504         struct l_semid_ds linux_semid;
 505         struct l_seminfo linux_seminfo;
 506         struct semid_ds semid;
 507         union semun semun;
 508         register_t rval;
 509         int cmd, error;
 510
 511         switch (args->cmd & ~LINUX_IPC_64) {
 512         case LINUX_IPC_RMID:
 513                 cmd = IPC_RMID;
 514                 break;
 515         case LINUX_GETNCNT:
 516                 cmd = GETNCNT;
 517                 break;
 518         case LINUX_GETPID:
 519                 cmd = GETPID;
 520                 break;
 521         case LINUX_GETVAL:
 522                 cmd = GETVAL;
 523                 break;
 524         case LINUX_GETZCNT:
 525                 cmd = GETZCNT;
 526                 break;
 527         case LINUX_SETVAL:
 528                 cmd = SETVAL;
 529                 semun.val = args->arg.val;
 530                 break;
 531         case LINUX_IPC_SET:
 532                 cmd = IPC_SET;
 533                 error = linux_semid_pullup(args->cmd & LINUX_IPC_64,
 534                     &linux_semid, PTRIN(args->arg.buf));
 535                 if (error)
 536                         return (error);
 537                 linux_to_bsd_semid_ds(&linux_semid, &semid);
 538                 semun.buf = &semid;
 539                 return (kern_semctl(td, args->semid, args->semnum, cmd, &semun,
 540                     td->td_retval));
 541         case LINUX_IPC_STAT:
 542         case LINUX_SEM_STAT:
 543                 if ((args->cmd & ~LINUX_IPC_64) == LINUX_IPC_STAT)
 544                         cmd = IPC_STAT;
 545                 else
 546                         cmd = SEM_STAT;
 547                 semun.buf = &semid;
 548                 error = kern_semctl(td, args->semid, args->semnum, cmd, &semun,
 549                     &rval);
 550                 if (error)
 551                         return (error);
 552                 bsd_to_linux_semid_ds(&semid, &linux_semid);
 553                 error = linux_semid_pushdown(args->cmd & LINUX_IPC_64,
 554                     &linux_semid, PTRIN(args->arg.buf));
 555                 if (error == 0)
 556                         td->td_retval[0] = (cmd == SEM_STAT) ? rval : 0;
 557                 return (error);
 558         case LINUX_IPC_INFO:
 559         case LINUX_SEM_INFO:
 560                 bcopy(&seminfo, &linux_seminfo, sizeof(linux_seminfo) );
 561 /* XXX BSD equivalent?
 562 #define used_semids 10
 563 #define used_sems 10
 564                 linux_seminfo.semusz = used_semids;
 565                 linux_seminfo.semaem = used_sems;
 566 */
 567                 error = copyout(&linux_seminfo,
 568                     PTRIN(args->arg.buf), sizeof(linux_seminfo));
 569                 if (error)
 570                         return error;
 571                 td->td_retval[0] = seminfo.semmni;
 572                 return 0;                       /* No need for __semctl call */
 573         case LINUX_GETALL:
 574                 cmd = GETALL;
 575                 semun.val = args->arg.val;
 576                 break;
 577         case LINUX_SETALL:
 578                 cmd = SETALL;
 579                 semun.val = args->arg.val;
 580                 break;
 581         default:
 582                 linux_msg(td, "ipc type %d is not implemented",
 583                   args->cmd & ~LINUX_IPC_64);
 584                 return EINVAL;
 585         }
 586         return (kern_semctl(td, args->semid, args->semnum, cmd, &semun,
 587             td->td_retval));
 588 }
 589
 590 int
 591 linux_msgsnd(struct thread *td, struct linux_msgsnd_args *args)
 592 {
 593         const void *msgp;
 594         long mtype;
 595         l_long lmtype;
 596         int error;
 597
 598         if ((l_long)args->msgsz < 0 || args->msgsz > (l_long)msginfo.msgmax)
 599                 return (EINVAL);
 600         msgp = PTRIN(args->msgp);
 601         if ((error = copyin(msgp, &lmtype, sizeof(lmtype))) != 0)
 602                 return (error);
 603         mtype = (long)lmtype;
 604         return (kern_msgsnd(td, args->msqid,
 605             (const char *)msgp + sizeof(lmtype),
 606             args->msgsz, args->msgflg, mtype));
 607 }
 608
 609 int
 610 linux_msgrcv(struct thread *td, struct linux_msgrcv_args *args)
 611 {
 612         void *msgp;
 613         long mtype;
 614         l_long lmtype;
 615         int error;
 616
 617         if ((l_long)args->msgsz < 0 || args->msgsz > (l_long)msginfo.msgmax)
 618                 return (EINVAL);
 619         msgp = PTRIN(args->msgp);
 620         if ((error = kern_msgrcv(td, args->msqid,
 621             (char *)msgp + sizeof(lmtype), args->msgsz,
 622             args->msgtyp, args->msgflg, &mtype)) != 0)
 623                 return (error);
 624         lmtype = (l_long)mtype;
 625         return (copyout(&lmtype, msgp, sizeof(lmtype)));
 626 }
 627
 628 int
 629 linux_msgget(struct thread *td, struct linux_msgget_args *args)
 630 {
 631     struct msgget_args /* {
 632         key_t   key;
 633         int     msgflg;
 634     } */ bsd_args;
 635
 636     bsd_args.key = args->key;
 637     bsd_args.msgflg = args->msgflg;
 638     return msgget(td, &bsd_args);
 639 }
 640
 641 int
 642 linux_msgctl(struct thread *td, struct linux_msgctl_args *args)
 643 {
 644     int error, bsd_cmd;
 645     struct l_msqid_ds linux_msqid;
 646     struct msqid_ds bsd_msqid;
 647
 648     bsd_cmd = args->cmd & ~LINUX_IPC_64;
 649     switch (bsd_cmd) {
 650     case LINUX_IPC_INFO:
 651     case LINUX_MSG_INFO: {
 652         struct l_msginfo linux_msginfo;
 653
 654         /*
 655          * XXX MSG_INFO uses the same data structure but returns different
 656          * dynamic counters in msgpool, msgmap, and msgtql fields.
 657          */
 658         linux_msginfo.msgpool = (long)msginfo.msgmni *
 659             (long)msginfo.msgmnb / 1024L;       /* XXX MSG_INFO. */
 660         linux_msginfo.msgmap = msginfo.msgmnb;  /* XXX MSG_INFO. */
 661         linux_msginfo.msgmax = msginfo.msgmax;
 662         linux_msginfo.msgmnb = msginfo.msgmnb;
 663         linux_msginfo.msgmni = msginfo.msgmni;
 664         linux_msginfo.msgssz = msginfo.msgssz;
 665         linux_msginfo.msgtql = msginfo.msgtql;  /* XXX MSG_INFO. */
 666         linux_msginfo.msgseg = msginfo.msgseg;
 667         error = copyout(&linux_msginfo, PTRIN(args->buf),
 668             sizeof(linux_msginfo));
 669         if (error == 0)
 670             td->td_retval[0] = msginfo.msgmni;  /* XXX */
 671
 672         return (error);
 673     }
 674
 675     case LINUX_IPC_SET:
 676         error = linux_msqid_pullup(args->cmd & LINUX_IPC_64,
 677             &linux_msqid, PTRIN(args->buf));
 678         if (error)
 679             return (error);
 680         linux_to_bsd_msqid_ds(&linux_msqid, &bsd_msqid);
 681         break;
 682     }
 683
 684     error = kern_msgctl(td, args->msqid, bsd_cmd, &bsd_msqid);
 685     if (error != 0)
 686         if (bsd_cmd != LINUX_IPC_RMID || error != EINVAL)
 687             return (error);
 688
 689     if (bsd_cmd == LINUX_IPC_STAT) {
 690         bsd_to_linux_msqid_ds(&bsd_msqid, &linux_msqid);
 691         return (linux_msqid_pushdown(args->cmd & LINUX_IPC_64,
 692           &linux_msqid, PTRIN(args->buf)));
 693     }
 694
 695     return (0);
 696 }
 697
 698 int
 699 linux_shmat(struct thread *td, struct linux_shmat_args *args)
 700 {
 701     struct shmat_args /* {
 702         int shmid;
 703         void *shmaddr;
 704         int shmflg;
 705     } */ bsd_args;
 706     int error;
 707 #if defined(__i386__) || (defined(__amd64__) && defined(COMPAT_LINUX32))
 708     l_uintptr_t addr;
 709 #endif
 710
 711     bsd_args.shmid = args->shmid;
 712     bsd_args.shmaddr = PTRIN(args->shmaddr);
 713     bsd_args.shmflg = args->shmflg;
 714     if ((error = shmat(td, &bsd_args)))
 715         return error;
 716 #if defined(__i386__) || (defined(__amd64__) && defined(COMPAT_LINUX32))
 717     addr = td->td_retval[0];
 718     if ((error = copyout(&addr, PTRIN(args->raddr), sizeof(addr))))
 719         return error;
 720     td->td_retval[0] = 0;
 721 #endif
 722     return 0;
 723 }
 724
 725 int
 726 linux_shmdt(struct thread *td, struct linux_shmdt_args *args)
 727 {
 728     struct shmdt_args /* {
 729         void *shmaddr;
 730     } */ bsd_args;
 731
 732     bsd_args.shmaddr = PTRIN(args->shmaddr);
 733     return shmdt(td, &bsd_args);
 734 }
 735
 736 int
 737 linux_shmget(struct thread *td, struct linux_shmget_args *args)
 738 {
 739     struct shmget_args /* {
 740         key_t key;
 741         int size;
 742         int shmflg;
 743     } */ bsd_args;
 744
 745     bsd_args.key = args->key;
 746     bsd_args.size = args->size;
 747     bsd_args.shmflg = args->shmflg;
 748     return shmget(td, &bsd_args);
 749 }
 750
 751 int
 752 linux_shmctl(struct thread *td, struct linux_shmctl_args *args)
 753 {
 754     struct l_shmid_ds linux_shmid;
 755         struct l_shminfo linux_shminfo;
 756         struct l_shm_info linux_shm_info;
 757         struct shmid_ds bsd_shmid;
 758     int error;
 759
 760     switch (args->cmd & ~LINUX_IPC_64) {
 761
 762         case LINUX_IPC_INFO: {
 763             struct shminfo bsd_shminfo;
 764
 765             /* Perform shmctl wanting removed segments lookup */
 766             error = kern_shmctl(td, args->shmid, IPC_INFO,
 767                 (void *)&bsd_shminfo, NULL);
 768             if (error)
 769                 return error;
 770
 771             bsd_to_linux_shminfo(&bsd_shminfo, &linux_shminfo);
 772
 773             return (linux_shminfo_pushdown(args->cmd & LINUX_IPC_64,
 774                &linux_shminfo, PTRIN(args->buf)));
 775         }
 776
 777         case LINUX_SHM_INFO: {
 778             struct shm_info bsd_shm_info;
 779
 780             /* Perform shmctl wanting removed segments lookup */
 781             error = kern_shmctl(td, args->shmid, SHM_INFO,
 782                 (void *)&bsd_shm_info, NULL);
 783             if (error)
 784                 return error;
 785
 786             bsd_to_linux_shm_info(&bsd_shm_info, &linux_shm_info);
 787
 788             return copyout(&linux_shm_info, PTRIN(args->buf),
 789                 sizeof(struct l_shm_info));
 790         }
 791
 792         case LINUX_IPC_STAT:
 793             /* Perform shmctl wanting removed segments lookup */
 794             error = kern_shmctl(td, args->shmid, IPC_STAT,
 795                 (void *)&bsd_shmid, NULL);
 796             if (error)
 797                 return error;
 798
 799             bsd_to_linux_shmid_ds(&bsd_shmid, &linux_shmid);
 800
 801             return (linux_shmid_pushdown(args->cmd & LINUX_IPC_64,
 802           &linux_shmid, PTRIN(args->buf)));
 803
 804     case LINUX_SHM_STAT:
 805         /* Perform shmctl wanting removed segments lookup */
 806         error = kern_shmctl(td, args->shmid, IPC_STAT,
 807             (void *)&bsd_shmid, NULL);
 808         if (error)
 809                 return error;
 810
 811         bsd_to_linux_shmid_ds(&bsd_shmid, &linux_shmid);
 812
 813         return (linux_shmid_pushdown(args->cmd & LINUX_IPC_64,
 814            &linux_shmid, PTRIN(args->buf)));
 815
 816     case LINUX_IPC_SET:
 817         error = linux_shmid_pullup(args->cmd & LINUX_IPC_64,
 818           &linux_shmid, PTRIN(args->buf));
 819         if (error)
 820                 return error;
 821
 822         linux_to_bsd_shmid_ds(&linux_shmid, &bsd_shmid);
 823
 824         /* Perform shmctl wanting removed segments lookup */
 825         return kern_shmctl(td, args->shmid, IPC_SET,
 826             (void *)&bsd_shmid, NULL);
 827
 828     case LINUX_IPC_RMID: {
 829         void *buf;
 830
 831         if (args->buf == 0)
 832                 buf = NULL;
 833         else {
 834                 error = linux_shmid_pullup(args->cmd & LINUX_IPC_64,
 835                     &linux_shmid, PTRIN(args->buf));
 836                 if (error)
 837                         return error;
 838                 linux_to_bsd_shmid_ds(&linux_shmid, &bsd_shmid);
 839                 buf = (void *)&bsd_shmid;
 840         }
 841         return kern_shmctl(td, args->shmid, IPC_RMID, buf, NULL);
 842     }
 843
 844     case LINUX_SHM_LOCK:
 845     case LINUX_SHM_UNLOCK:
 846     default:
 847         linux_msg(td, "ipc typ=%d not implemented", args->cmd & ~LINUX_IPC_64);
 848         return EINVAL;
 849     }
 850 }
 851
 852 MODULE_DEPEND(linux, sysvmsg, 1, 1, 1);
 853 MODULE_DEPEND(linux, sysvsem, 1, 1, 1);
 854 MODULE_DEPEND(linux, sysvshm, 1, 1, 1);