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
 101         lpp->shmmax = bpp->shmmax;
 102         lpp->shmmin = bpp->shmmin;
 103         lpp->shmmni = bpp->shmmni;
 104         lpp->shmseg = bpp->shmseg;
 105         lpp->shmall = bpp->shmall;
 106 }
 107
 108 static void
 109 bsd_to_linux_shm_info( struct shm_info *bpp, struct l_shm_info *lpp)
 110 {
 111
 112         lpp->used_ids = bpp->used_ids ;
 113         lpp->shm_tot = bpp->shm_tot ;
 114         lpp->shm_rss = bpp->shm_rss ;
 115         lpp->shm_swp = bpp->shm_swp ;
 116         lpp->swap_attempts = bpp->swap_attempts ;
 117         lpp->swap_successes = bpp->swap_successes ;
 118 }
 119
 120 struct l_ipc_perm {
 121         l_key_t         key;
 122         l_uid16_t       uid;
 123         l_gid16_t       gid;
 124         l_uid16_t       cuid;
 125         l_gid16_t       cgid;
 126         l_ushort        mode;
 127         l_ushort        seq;
 128 };
 129
 130 static void
 131 linux_to_bsd_ipc_perm(struct l_ipc_perm *lpp, struct ipc_perm *bpp)
 132 {
 133
 134         bpp->key = lpp->key;
 135         bpp->uid = lpp->uid;
 136         bpp->gid = lpp->gid;
 137         bpp->cuid = lpp->cuid;
 138         bpp->cgid = lpp->cgid;
 139         bpp->mode = lpp->mode;
 140         bpp->seq = lpp->seq;
 141 }
 142
 143
 144 static void
 145 bsd_to_linux_ipc_perm(struct ipc_perm *bpp, struct l_ipc_perm *lpp)
 146 {
 147
 148         lpp->key = bpp->key;
 149         lpp->uid = bpp->uid;
 150         lpp->gid = bpp->gid;
 151         lpp->cuid = bpp->cuid;
 152         lpp->cgid = bpp->cgid;
 153         lpp->mode = bpp->mode;
 154         lpp->seq = bpp->seq;
 155 }
 156
 157 struct l_msqid_ds {
 158         struct l_ipc_perm       msg_perm;
 159         l_uintptr_t             msg_first;      /* first message on queue,unused */
 160         l_uintptr_t             msg_last;       /* last message in queue,unused */
 161         l_time_t                msg_stime;      /* last msgsnd time */
 162         l_time_t                msg_rtime;      /* last msgrcv time */
 163         l_time_t                msg_ctime;      /* last change time */
 164         l_ulong                 msg_lcbytes;    /* Reuse junk fields for 32 bit */
 165         l_ulong                 msg_lqbytes;    /* ditto */
 166         l_ushort                msg_cbytes;     /* current number of bytes on queue */
 167         l_ushort                msg_qnum;       /* number of messages in queue */
 168         l_ushort                msg_qbytes;     /* max number of bytes on queue */
 169         l_pid_t                 msg_lspid;      /* pid of last msgsnd */
 170         l_pid_t                 msg_lrpid;      /* last receive pid */
 171 }
 172 #if defined(__amd64__) && defined(COMPAT_LINUX32)
 173 __packed
 174 #endif
 175 ;
 176
 177 struct l_semid_ds {
 178         struct l_ipc_perm       sem_perm;
 179         l_time_t                sem_otime;
 180         l_time_t                sem_ctime;
 181         l_uintptr_t             sem_base;
 182         l_uintptr_t             sem_pending;
 183         l_uintptr_t             sem_pending_last;
 184         l_uintptr_t             undo;
 185         l_ushort                sem_nsems;
 186 }
 187 #if defined(__amd64__) && defined(COMPAT_LINUX32)
 188 __packed
 189 #endif
 190 ;
 191
 192 struct l_shmid_ds {
 193         struct l_ipc_perm       shm_perm;
 194         l_int                   shm_segsz;
 195         l_time_t                shm_atime;
 196         l_time_t                shm_dtime;
 197         l_time_t                shm_ctime;
 198         l_ushort                shm_cpid;
 199         l_ushort                shm_lpid;
 200         l_short                 shm_nattch;
 201         l_ushort                private1;
 202         l_uintptr_t             private2;
 203         l_uintptr_t             private3;
 204 };
 205
 206 static void
 207 linux_to_bsd_semid_ds(struct l_semid_ds *lsp, struct semid_ds *bsp)
 208 {
 209
 210         linux_to_bsd_ipc_perm(&lsp->sem_perm, &bsp->sem_perm);
 211         bsp->sem_otime = lsp->sem_otime;
 212         bsp->sem_ctime = lsp->sem_ctime;
 213         bsp->sem_nsems = lsp->sem_nsems;
 214         bsp->sem_base = PTRIN(lsp->sem_base);
 215 }
 216
 217 static void
 218 bsd_to_linux_semid_ds(struct semid_ds *bsp, struct l_semid_ds *lsp)
 219 {
 220
 221         bsd_to_linux_ipc_perm(&bsp->sem_perm, &lsp->sem_perm);
 222         lsp->sem_otime = bsp->sem_otime;
 223         lsp->sem_ctime = bsp->sem_ctime;
 224         lsp->sem_nsems = bsp->sem_nsems;
 225         lsp->sem_base = PTROUT(bsp->sem_base);
 226 }
 227
 228 static void
 229 linux_to_bsd_shmid_ds(struct l_shmid_ds *lsp, struct shmid_ds *bsp)
 230 {
 231
 232         linux_to_bsd_ipc_perm(&lsp->shm_perm, &bsp->shm_perm);
 233         bsp->shm_segsz = lsp->shm_segsz;
 234         bsp->shm_lpid = lsp->shm_lpid;
 235         bsp->shm_cpid = lsp->shm_cpid;
 236         bsp->shm_nattch = lsp->shm_nattch;
 237         bsp->shm_atime = lsp->shm_atime;
 238         bsp->shm_dtime = lsp->shm_dtime;
 239         bsp->shm_ctime = lsp->shm_ctime;
 240 }
 241
 242 static void
 243 bsd_to_linux_shmid_ds(struct shmid_ds *bsp, struct l_shmid_ds *lsp)
 244 {
 245
 246         bsd_to_linux_ipc_perm(&bsp->shm_perm, &lsp->shm_perm);
 247         if (bsp->shm_segsz > INT_MAX)
 248                 lsp->shm_segsz = INT_MAX;
 249         else
 250                 lsp->shm_segsz = bsp->shm_segsz;
 251         lsp->shm_lpid = bsp->shm_lpid;
 252         lsp->shm_cpid = bsp->shm_cpid;
 253         if (bsp->shm_nattch > SHRT_MAX)
 254                 lsp->shm_nattch = SHRT_MAX;
 255         else
 256                 lsp->shm_nattch = bsp->shm_nattch;
 257         lsp->shm_atime = bsp->shm_atime;
 258         lsp->shm_dtime = bsp->shm_dtime;
 259         lsp->shm_ctime = bsp->shm_ctime;
 260         lsp->private3 = 0;
 261 }
 262
 263 static void
 264 linux_to_bsd_msqid_ds(struct l_msqid_ds *lsp, struct msqid_ds *bsp)
 265 {
 266
 267         linux_to_bsd_ipc_perm(&lsp->msg_perm, &bsp->msg_perm);
 268         bsp->msg_cbytes = lsp->msg_cbytes;
 269         bsp->msg_qnum = lsp->msg_qnum;
 270         bsp->msg_qbytes = lsp->msg_qbytes;
 271         bsp->msg_lspid = lsp->msg_lspid;
 272         bsp->msg_lrpid = lsp->msg_lrpid;
 273         bsp->msg_stime = lsp->msg_stime;
 274         bsp->msg_rtime = lsp->msg_rtime;
 275         bsp->msg_ctime = lsp->msg_ctime;
 276 }
 277
 278 static void
 279 bsd_to_linux_msqid_ds(struct msqid_ds *bsp, struct l_msqid_ds *lsp)
 280 {
 281
 282         bsd_to_linux_ipc_perm(&bsp->msg_perm, &lsp->msg_perm);
 283         lsp->msg_cbytes = bsp->msg_cbytes;
 284         lsp->msg_qnum = bsp->msg_qnum;
 285         lsp->msg_qbytes = bsp->msg_qbytes;
 286         lsp->msg_lspid = bsp->msg_lspid;
 287         lsp->msg_lrpid = bsp->msg_lrpid;
 288         lsp->msg_stime = bsp->msg_stime;
 289         lsp->msg_rtime = bsp->msg_rtime;
 290         lsp->msg_ctime = bsp->msg_ctime;
 291 }
 292
 293 static void
 294 linux_ipc_perm_to_ipc64_perm(struct l_ipc_perm *in, struct l_ipc64_perm *out)
 295 {
 296
 297         /* XXX: do we really need to do something here? */
 298         out->key = in->key;
 299         out->uid = in->uid;
 300         out->gid = in->gid;
 301         out->cuid = in->cuid;
 302         out->cgid = in->cgid;
 303         out->mode = in->mode;
 304         out->seq = in->seq;
 305 }
 306
 307 static int
 308 linux_msqid_pullup(l_int ver, struct l_msqid_ds *linux_msqid, caddr_t uaddr)
 309 {
 310         struct l_msqid64_ds linux_msqid64;
 311         int error;
 312
 313         if (ver == LINUX_IPC_64) {
 314                 error = copyin(uaddr, &linux_msqid64, sizeof(linux_msqid64));
 315                 if (error != 0)
 316                         return (error);
 317
 318                 bzero(linux_msqid, sizeof(*linux_msqid));
 319
 320                 linux_msqid->msg_perm.uid = linux_msqid64.msg_perm.uid;
 321                 linux_msqid->msg_perm.gid = linux_msqid64.msg_perm.gid;
 322                 linux_msqid->msg_perm.mode = linux_msqid64.msg_perm.mode;
 323
 324                 if (linux_msqid64.msg_qbytes > USHRT_MAX)
 325                         linux_msqid->msg_lqbytes = linux_msqid64.msg_qbytes;
 326                 else
 327                         linux_msqid->msg_qbytes = linux_msqid64.msg_qbytes;
 328         } else
 329                 error = copyin(uaddr, linux_msqid, sizeof(*linux_msqid));
 330
 331         return (error);
 332 }
 333
 334 static int
 335 linux_msqid_pushdown(l_int ver, struct l_msqid_ds *linux_msqid, caddr_t uaddr)
 336 {
 337         struct l_msqid64_ds linux_msqid64;
 338
 339         if (ver == LINUX_IPC_64) {
 340                 bzero(&linux_msqid64, sizeof(linux_msqid64));
 341
 342                 linux_ipc_perm_to_ipc64_perm(&linux_msqid->msg_perm,
 343                     &linux_msqid64.msg_perm);
 344
 345                 linux_msqid64.msg_stime = linux_msqid->msg_stime;
 346                 linux_msqid64.msg_rtime = linux_msqid->msg_rtime;
 347                 linux_msqid64.msg_ctime = linux_msqid->msg_ctime;
 348
 349                 if (linux_msqid->msg_cbytes == 0)
 350                         linux_msqid64.msg_cbytes = linux_msqid->msg_lcbytes;
 351                 else
 352                         linux_msqid64.msg_cbytes = linux_msqid->msg_cbytes;
 353
 354                 linux_msqid64.msg_qnum = linux_msqid->msg_qnum;
 355
 356                 if (linux_msqid->msg_qbytes == 0)
 357                         linux_msqid64.msg_qbytes = linux_msqid->msg_lqbytes;
 358                 else
 359                         linux_msqid64.msg_qbytes = linux_msqid->msg_qbytes;
 360
 361                 linux_msqid64.msg_lspid = linux_msqid->msg_lspid;
 362                 linux_msqid64.msg_lrpid = linux_msqid->msg_lrpid;
 363
 364                 return (copyout(&linux_msqid64, uaddr, sizeof(linux_msqid64)));
 365         } else
 366                 return (copyout(linux_msqid, uaddr, sizeof(*linux_msqid)));
 367 }
 368
 369 static int
 370 linux_semid_pullup(l_int ver, struct l_semid_ds *linux_semid, caddr_t uaddr)
 371 {
 372         struct l_semid64_ds linux_semid64;
 373         int error;
 374
 375         if (ver == LINUX_IPC_64) {
 376                 error = copyin(uaddr, &linux_semid64, sizeof(linux_semid64));
 377                 if (error != 0)
 378                         return (error);
 379
 380                 bzero(linux_semid, sizeof(*linux_semid));
 381
 382                 linux_semid->sem_perm.uid = linux_semid64.sem_perm.uid;
 383                 linux_semid->sem_perm.gid = linux_semid64.sem_perm.gid;
 384                 linux_semid->sem_perm.mode = linux_semid64.sem_perm.mode;
 385         } else
 386                 error = copyin(uaddr, linux_semid, sizeof(*linux_semid));
 387
 388         return (error);
 389 }
 390
 391 static int
 392 linux_semid_pushdown(l_int ver, struct l_semid_ds *linux_semid, caddr_t uaddr)
 393 {
 394         struct l_semid64_ds linux_semid64;
 395
 396         if (ver == LINUX_IPC_64) {
 397                 bzero(&linux_semid64, sizeof(linux_semid64));
 398
 399                 linux_ipc_perm_to_ipc64_perm(&linux_semid->sem_perm,
 400                     &linux_semid64.sem_perm);
 401
 402                 linux_semid64.sem_otime = linux_semid->sem_otime;
 403                 linux_semid64.sem_ctime = linux_semid->sem_ctime;
 404                 linux_semid64.sem_nsems = linux_semid->sem_nsems;
 405
 406                 return (copyout(&linux_semid64, uaddr, sizeof(linux_semid64)));
 407         } else
 408                 return (copyout(linux_semid, uaddr, sizeof(*linux_semid)));
 409 }
 410
 411 static int
 412 linux_shmid_pullup(l_int ver, struct l_shmid_ds *linux_shmid, caddr_t uaddr)
 413 {
 414         struct l_shmid64_ds linux_shmid64;
 415         int error;
 416
 417         if (ver == LINUX_IPC_64) {
 418                 error = copyin(uaddr, &linux_shmid64, sizeof(linux_shmid64));
 419                 if (error != 0)
 420                         return (error);
 421
 422                 bzero(linux_shmid, sizeof(*linux_shmid));
 423
 424                 linux_shmid->shm_perm.uid = linux_shmid64.shm_perm.uid;
 425                 linux_shmid->shm_perm.gid = linux_shmid64.shm_perm.gid;
 426                 linux_shmid->shm_perm.mode = linux_shmid64.shm_perm.mode;
 427         } else
 428                 error = copyin(uaddr, linux_shmid, sizeof(*linux_shmid));
 429
 430         return (error);
 431 }
 432
 433 static int
 434 linux_shmid_pushdown(l_int ver, struct l_shmid_ds *linux_shmid, caddr_t uaddr)
 435 {
 436         struct l_shmid64_ds linux_shmid64;
 437
 438         /*
 439          * XXX: This is backwards and loses information in shm_nattch
 440          * and shm_segsz.  We should probably either expose the BSD
 441          * shmid structure directly and convert it to either the
 442          * non-64 or 64 variant directly or the code should always
 443          * convert to the 64 variant and then truncate values into the
 444          * non-64 variant if needed since the 64 variant has more
 445          * precision.
 446          */
 447         if (ver == LINUX_IPC_64) {
 448                 bzero(&linux_shmid64, sizeof(linux_shmid64));
 449
 450                 linux_ipc_perm_to_ipc64_perm(&linux_shmid->shm_perm,
 451                     &linux_shmid64.shm_perm);
 452
 453                 linux_shmid64.shm_segsz = linux_shmid->shm_segsz;
 454                 linux_shmid64.shm_atime = linux_shmid->shm_atime;
 455                 linux_shmid64.shm_dtime = linux_shmid->shm_dtime;
 456                 linux_shmid64.shm_ctime = linux_shmid->shm_ctime;
 457                 linux_shmid64.shm_cpid = linux_shmid->shm_cpid;
 458                 linux_shmid64.shm_lpid = linux_shmid->shm_lpid;
 459                 linux_shmid64.shm_nattch = linux_shmid->shm_nattch;
 460
 461                 return (copyout(&linux_shmid64, uaddr, sizeof(linux_shmid64)));
 462         } else
 463                 return (copyout(linux_shmid, uaddr, sizeof(*linux_shmid)));
 464 }
 465
 466 static int
 467 linux_shminfo_pushdown(l_int ver, struct l_shminfo *linux_shminfo,
 468     caddr_t uaddr)
 469 {
 470         struct l_shminfo64 linux_shminfo64;
 471
 472         if (ver == LINUX_IPC_64) {
 473                 bzero(&linux_shminfo64, sizeof(linux_shminfo64));
 474
 475                 linux_shminfo64.shmmax = linux_shminfo->shmmax;
 476                 linux_shminfo64.shmmin = linux_shminfo->shmmin;
 477                 linux_shminfo64.shmmni = linux_shminfo->shmmni;
 478                 linux_shminfo64.shmseg = linux_shminfo->shmseg;
 479                 linux_shminfo64.shmall = linux_shminfo->shmall;
 480
 481                 return (copyout(&linux_shminfo64, uaddr,
 482                     sizeof(linux_shminfo64)));
 483         } else
 484                 return (copyout(linux_shminfo, uaddr, sizeof(*linux_shminfo)));
 485 }
 486
 487 int
 488 linux_semop(struct thread *td, struct linux_semop_args *args)
 489 {
 490         struct semop_args /* {
 491         int     semid;
 492         struct  sembuf *sops;
 493         int             nsops;
 494         } */ bsd_args;
 495
 496         bsd_args.semid = args->semid;
 497         bsd_args.sops = PTRIN(args->tsops);
 498         bsd_args.nsops = args->nsops;
 499         return (sys_semop(td, &bsd_args));
 500 }
 501
 502 int
 503 linux_semget(struct thread *td, struct linux_semget_args *args)
 504 {
 505         struct semget_args /* {
 506         key_t   key;
 507         int             nsems;
 508         int             semflg;
 509         } */ bsd_args;
 510
 511         if (args->nsems < 0)
 512                 return (EINVAL);
 513         bsd_args.key = args->key;
 514         bsd_args.nsems = args->nsems;
 515         bsd_args.semflg = args->semflg;
 516         return (sys_semget(td, &bsd_args));
 517 }
 518
 519 int
 520 linux_semctl(struct thread *td, struct linux_semctl_args *args)
 521 {
 522         struct l_semid_ds linux_semid;
 523         struct l_seminfo linux_seminfo;
 524         struct semid_ds semid;
 525         union semun semun;
 526         register_t rval;
 527         int cmd, error;
 528
 529         switch (args->cmd & ~LINUX_IPC_64) {
 530         case LINUX_IPC_RMID:
 531                 cmd = IPC_RMID;
 532                 break;
 533         case LINUX_GETNCNT:
 534                 cmd = GETNCNT;
 535                 break;
 536         case LINUX_GETPID:
 537                 cmd = GETPID;
 538                 break;
 539         case LINUX_GETVAL:
 540                 cmd = GETVAL;
 541                 break;
 542         case LINUX_GETZCNT:
 543                 cmd = GETZCNT;
 544                 break;
 545         case LINUX_SETVAL:
 546                 cmd = SETVAL;
 547                 semun.val = args->arg.val;
 548                 break;
 549         case LINUX_IPC_SET:
 550                 cmd = IPC_SET;
 551                 error = linux_semid_pullup(args->cmd & LINUX_IPC_64,
 552                     &linux_semid, PTRIN(args->arg.buf));
 553                 if (error)
 554                         return (error);
 555                 linux_to_bsd_semid_ds(&linux_semid, &semid);
 556                 semun.buf = &semid;
 557                 return (kern_semctl(td, args->semid, args->semnum, cmd, &semun,
 558                     td->td_retval));
 559         case LINUX_IPC_STAT:
 560         case LINUX_SEM_STAT:
 561                 if ((args->cmd & ~LINUX_IPC_64) == LINUX_IPC_STAT)
 562                         cmd = IPC_STAT;
 563                 else
 564                         cmd = SEM_STAT;
 565                 semun.buf = &semid;
 566                 error = kern_semctl(td, args->semid, args->semnum, cmd, &semun,
 567                     &rval);
 568                 if (error)
 569                         return (error);
 570                 bsd_to_linux_semid_ds(&semid, &linux_semid);
 571                 error = linux_semid_pushdown(args->cmd & LINUX_IPC_64,
 572                     &linux_semid, PTRIN(args->arg.buf));
 573                 if (error == 0)
 574                         td->td_retval[0] = (cmd == SEM_STAT) ? rval : 0;
 575                 return (error);
 576         case LINUX_IPC_INFO:
 577         case LINUX_SEM_INFO:
 578                 bcopy(&seminfo, &linux_seminfo.semmni, sizeof(linux_seminfo) -
 579                     sizeof(linux_seminfo.semmap) );
 580                 /*
 581                  * Linux does not use the semmap field but populates it with
 582                  * the defined value from SEMMAP, which really is redefined to
 583                  * SEMMNS, which they define as SEMMNI * SEMMSL.  Try to
 584                  * simulate this returning our dynamic semmns value.
 585                  */
 586                 linux_seminfo.semmap = linux_seminfo.semmns;
 587 /* XXX BSD equivalent?
 588 #define used_semids 10
 589 #define used_sems 10
 590                 linux_seminfo.semusz = used_semids;
 591                 linux_seminfo.semaem = used_sems;
 592 */
 593                 error = copyout(&linux_seminfo,
 594                     PTRIN(args->arg.buf), sizeof(linux_seminfo));
 595                 if (error)
 596                         return (error);
 597                 td->td_retval[0] = seminfo.semmni;
 598                 return (0);                     /* No need for __semctl call */
 599         case LINUX_GETALL:
 600                 cmd = GETALL;
 601                 semun.val = args->arg.val;
 602                 break;
 603         case LINUX_SETALL:
 604                 cmd = SETALL;
 605                 semun.val = args->arg.val;
 606                 break;
 607         default:
 608                 linux_msg(td, "ipc type %d is not implemented",
 609                   args->cmd & ~LINUX_IPC_64);
 610                 return (EINVAL);
 611         }
 612         return (kern_semctl(td, args->semid, args->semnum, cmd, &semun,
 613             td->td_retval));
 614 }
 615
 616 int
 617 linux_msgsnd(struct thread *td, struct linux_msgsnd_args *args)
 618 {
 619         const void *msgp;
 620         long mtype;
 621         l_long lmtype;
 622         int error;
 623
 624         if ((l_long)args->msgsz < 0 || args->msgsz > (l_long)msginfo.msgmax)
 625                 return (EINVAL);
 626         msgp = PTRIN(args->msgp);
 627         if ((error = copyin(msgp, &lmtype, sizeof(lmtype))) != 0)
 628                 return (error);
 629         mtype = (long)lmtype;
 630         return (kern_msgsnd(td, args->msqid,
 631             (const char *)msgp + sizeof(lmtype),
 632             args->msgsz, args->msgflg, mtype));
 633 }
 634
 635 int
 636 linux_msgrcv(struct thread *td, struct linux_msgrcv_args *args)
 637 {
 638         void *msgp;
 639         long mtype;
 640         l_long lmtype;
 641         int error;
 642
 643         if ((l_long)args->msgsz < 0 || args->msgsz > (l_long)msginfo.msgmax)
 644                 return (EINVAL);
 645         msgp = PTRIN(args->msgp);
 646         if ((error = kern_msgrcv(td, args->msqid,
 647             (char *)msgp + sizeof(lmtype), args->msgsz,
 648             args->msgtyp, args->msgflg, &mtype)) != 0)
 649                 return (error);
 650         lmtype = (l_long)mtype;
 651         return (copyout(&lmtype, msgp, sizeof(lmtype)));
 652 }
 653
 654 int
 655 linux_msgget(struct thread *td, struct linux_msgget_args *args)
 656 {
 657         struct msgget_args /* {
 658                 key_t   key;
 659                 int     msgflg;
 660         } */ bsd_args;
 661
 662         bsd_args.key = args->key;
 663         bsd_args.msgflg = args->msgflg;
 664         return (sys_msgget(td, &bsd_args));
 665 }
 666
 667 int
 668 linux_msgctl(struct thread *td, struct linux_msgctl_args *args)
 669 {
 670         int error, bsd_cmd;
 671         struct l_msqid_ds linux_msqid;
 672         struct msqid_ds bsd_msqid;
 673
 674         bsd_cmd = args->cmd & ~LINUX_IPC_64;
 675         switch (bsd_cmd) {
 676         case LINUX_IPC_INFO:
 677         case LINUX_MSG_INFO: {
 678                 struct l_msginfo linux_msginfo;
 679
 680                 /*
 681                  * XXX MSG_INFO uses the same data structure but returns different
 682                  * dynamic counters in msgpool, msgmap, and msgtql fields.
 683                  */
 684                 linux_msginfo.msgpool = (long)msginfo.msgmni *
 685                     (long)msginfo.msgmnb / 1024L;       /* XXX MSG_INFO. */
 686                 linux_msginfo.msgmap = msginfo.msgmnb;  /* XXX MSG_INFO. */
 687                 linux_msginfo.msgmax = msginfo.msgmax;
 688                 linux_msginfo.msgmnb = msginfo.msgmnb;
 689                 linux_msginfo.msgmni = msginfo.msgmni;
 690                 linux_msginfo.msgssz = msginfo.msgssz;
 691                 linux_msginfo.msgtql = msginfo.msgtql;  /* XXX MSG_INFO. */
 692                 linux_msginfo.msgseg = msginfo.msgseg;
 693                 error = copyout(&linux_msginfo, PTRIN(args->buf),
 694                     sizeof(linux_msginfo));
 695                 if (error == 0)
 696                     td->td_retval[0] = msginfo.msgmni;  /* XXX */
 697
 698                 return (error);
 699         }
 700
 701         /*
 702          * TODO: implement this
 703          * case LINUX_MSG_STAT:
 704          */
 705         case LINUX_IPC_STAT:
 706                 /* NOTHING */
 707                 break;
 708
 709         case LINUX_IPC_SET:
 710                 error = linux_msqid_pullup(args->cmd & LINUX_IPC_64,
 711                     &linux_msqid, PTRIN(args->buf));
 712                 if (error)
 713                         return (error);
 714                 linux_to_bsd_msqid_ds(&linux_msqid, &bsd_msqid);
 715                 break;
 716
 717         case LINUX_IPC_RMID:
 718                 /* NOTHING */
 719                 break;
 720
 721         default:
 722                 return (EINVAL);
 723                 break;
 724         }
 725
 726         error = kern_msgctl(td, args->msqid, bsd_cmd, &bsd_msqid);
 727         if (error != 0)
 728                 if (bsd_cmd != LINUX_IPC_RMID || error != EINVAL)
 729                         return (error);
 730
 731         if (bsd_cmd == LINUX_IPC_STAT) {
 732                 bsd_to_linux_msqid_ds(&bsd_msqid, &linux_msqid);
 733                 return (linux_msqid_pushdown(args->cmd & LINUX_IPC_64,
 734                     &linux_msqid, PTRIN(args->buf)));
 735         }
 736
 737         return (0);
 738 }
 739
 740 int
 741 linux_shmat(struct thread *td, struct linux_shmat_args *args)
 742 {
 743         struct shmat_args /* {
 744                 int shmid;
 745                 void *shmaddr;
 746                 int shmflg;
 747         } */ bsd_args;
 748         int error;
 749 #if defined(__i386__) || (defined(__amd64__) && defined(COMPAT_LINUX32))
 750         l_uintptr_t addr;
 751 #endif
 752
 753         bsd_args.shmid = args->shmid;
 754         bsd_args.shmaddr = PTRIN(args->shmaddr);
 755         bsd_args.shmflg = args->shmflg;
 756         if ((error = sys_shmat(td, &bsd_args)))
 757                 return (error);
 758 #if defined(__i386__) || (defined(__amd64__) && defined(COMPAT_LINUX32))
 759         addr = td->td_retval[0];
 760         if ((error = copyout(&addr, PTRIN(args->raddr), sizeof(addr))))
 761                 return (error);
 762         td->td_retval[0] = 0;
 763 #endif
 764         return (0);
 765 }
 766
 767 int
 768 linux_shmdt(struct thread *td, struct linux_shmdt_args *args)
 769 {
 770         struct shmdt_args /* {
 771                 void *shmaddr;
 772         } */ bsd_args;
 773
 774         bsd_args.shmaddr = PTRIN(args->shmaddr);
 775         return (sys_shmdt(td, &bsd_args));
 776 }
 777
 778 int
 779 linux_shmget(struct thread *td, struct linux_shmget_args *args)
 780 {
 781         struct shmget_args /* {
 782                 key_t key;
 783                 int size;
 784                 int shmflg;
 785         } */ bsd_args;
 786
 787         bsd_args.key = args->key;
 788         bsd_args.size = args->size;
 789         bsd_args.shmflg = args->shmflg;
 790         return (sys_shmget(td, &bsd_args));
 791 }
 792
 793 int
 794 linux_shmctl(struct thread *td, struct linux_shmctl_args *args)
 795 {
 796         struct l_shmid_ds linux_shmid;
 797         struct l_shminfo linux_shminfo;
 798         struct l_shm_info linux_shm_info;
 799         struct shmid_ds bsd_shmid;
 800         int error;
 801
 802         switch (args->cmd & ~LINUX_IPC_64) {
 803
 804         case LINUX_IPC_INFO: {
 805                 struct shminfo bsd_shminfo;
 806
 807                 /* Perform shmctl wanting removed segments lookup */
 808                 error = kern_shmctl(td, args->shmid, IPC_INFO,
 809                     (void *)&bsd_shminfo, NULL);
 810                 if (error)
 811                         return (error);
 812
 813                 bsd_to_linux_shminfo(&bsd_shminfo, &linux_shminfo);
 814
 815                 return (linux_shminfo_pushdown(args->cmd & LINUX_IPC_64,
 816                     &linux_shminfo, PTRIN(args->buf)));
 817         }
 818
 819         case LINUX_SHM_INFO: {
 820                 struct shm_info bsd_shm_info;
 821
 822                 /* Perform shmctl wanting removed segments lookup */
 823                 error = kern_shmctl(td, args->shmid, SHM_INFO,
 824                     (void *)&bsd_shm_info, NULL);
 825                 if (error)
 826                         return (error);
 827
 828                 bsd_to_linux_shm_info(&bsd_shm_info, &linux_shm_info);
 829
 830                 return (copyout(&linux_shm_info, PTRIN(args->buf),
 831                     sizeof(struct l_shm_info)));
 832         }
 833
 834         case LINUX_IPC_STAT:
 835                 /* Perform shmctl wanting removed segments lookup */
 836                 error = kern_shmctl(td, args->shmid, IPC_STAT,
 837                     (void *)&bsd_shmid, NULL);
 838                 if (error)
 839                         return (error);
 840
 841                 bsd_to_linux_shmid_ds(&bsd_shmid, &linux_shmid);
 842
 843                 return (linux_shmid_pushdown(args->cmd & LINUX_IPC_64,
 844                     &linux_shmid, PTRIN(args->buf)));
 845
 846         case LINUX_SHM_STAT:
 847                 /* Perform shmctl wanting removed segments lookup */
 848                 error = kern_shmctl(td, args->shmid, IPC_STAT,
 849                     (void *)&bsd_shmid, NULL);
 850                 if (error)
 851                         return (error);
 852
 853                 bsd_to_linux_shmid_ds(&bsd_shmid, &linux_shmid);
 854
 855                 return (linux_shmid_pushdown(args->cmd & LINUX_IPC_64,
 856                     &linux_shmid, PTRIN(args->buf)));
 857
 858         case LINUX_IPC_SET:
 859                 error = linux_shmid_pullup(args->cmd & LINUX_IPC_64,
 860                     &linux_shmid, PTRIN(args->buf));
 861                 if (error)
 862                         return (error);
 863
 864                 linux_to_bsd_shmid_ds(&linux_shmid, &bsd_shmid);
 865
 866                 /* Perform shmctl wanting removed segments lookup */
 867                 return (kern_shmctl(td, args->shmid, IPC_SET,
 868                     (void *)&bsd_shmid, NULL));
 869
 870         case LINUX_IPC_RMID: {
 871                 void *buf;
 872
 873                 if (args->buf == 0)
 874                         buf = NULL;
 875                 else {
 876                         error = linux_shmid_pullup(args->cmd & LINUX_IPC_64,
 877                             &linux_shmid, PTRIN(args->buf));
 878                         if (error)
 879                                 return (error);
 880                         linux_to_bsd_shmid_ds(&linux_shmid, &bsd_shmid);
 881                         buf = (void *)&bsd_shmid;
 882                 }
 883                 return (kern_shmctl(td, args->shmid, IPC_RMID, buf, NULL));
 884         }
 885
 886         case LINUX_SHM_LOCK:
 887                 /* FALLTHROUGH */
 888         case LINUX_SHM_UNLOCK:
 889                 /* FALLTHROUGH */
 890         default:
 891                 linux_msg(td, "ipc type %d not implemented",
 892                     args->cmd & ~LINUX_IPC_64);
 893                 return (EINVAL);
 894         }
 895 }
 896
 897 MODULE_DEPEND(linux, sysvmsg, 1, 1, 1);
 898 MODULE_DEPEND(linux, sysvsem, 1, 1, 1);
 899 MODULE_DEPEND(linux, sysvshm, 1, 1, 1);