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 #else
  48 #include <machine/../linux/linux.h>
  49 #include <machine/../linux/linux_proto.h>
  50 #endif
  51 #include <compat/linux/linux_ipc.h>
  52 #include <compat/linux/linux_ipc64.h>
  53 #include <compat/linux/linux_util.h>
  54
  55 /*
  56  * old, pre 2.4 kernel
  57  */
  58 struct l_ipc_perm {
  59         l_key_t         key;
  60         l_uid16_t       uid;
  61         l_gid16_t       gid;
  62         l_uid16_t       cuid;
  63         l_gid16_t       cgid;
  64         l_ushort        mode;
  65         l_ushort        seq;
  66 };
  67
  68 struct l_seminfo {
  69         l_int semmap;
  70         l_int semmni;
  71         l_int semmns;
  72         l_int semmnu;
  73         l_int semmsl;
  74         l_int semopm;
  75         l_int semume;
  76         l_int semusz;
  77         l_int semvmx;
  78         l_int semaem;
  79 };
  80
  81 struct l_shminfo {
  82         l_int shmmax;
  83         l_int shmmin;
  84         l_int shmmni;
  85         l_int shmseg;
  86         l_int shmall;
  87 };
  88
  89 struct l_shm_info {
  90         l_int used_ids;
  91         l_ulong shm_tot;  /* total allocated shm */
  92         l_ulong shm_rss;  /* total resident shm */
  93         l_ulong shm_swp;  /* total swapped shm */
  94         l_ulong swap_attempts;
  95         l_ulong swap_successes;
  96 };
  97
  98 struct l_msginfo {
  99         l_int msgpool;
 100         l_int msgmap;
 101         l_int msgmax;
 102         l_int msgmnb;
 103         l_int msgmni;
 104         l_int msgssz;
 105         l_int msgtql;
 106         l_ushort msgseg;
 107 };
 108
 109 static void
 110 bsd_to_linux_shminfo( struct shminfo *bpp, struct l_shminfo64 *lpp)
 111 {
 112
 113         lpp->shmmax = bpp->shmmax;
 114         lpp->shmmin = bpp->shmmin;
 115         lpp->shmmni = bpp->shmmni;
 116         lpp->shmseg = bpp->shmseg;
 117         lpp->shmall = bpp->shmall;
 118 }
 119
 120 static void
 121 bsd_to_linux_shm_info( struct shm_info *bpp, struct l_shm_info *lpp)
 122 {
 123
 124         lpp->used_ids = bpp->used_ids;
 125         lpp->shm_tot = bpp->shm_tot;
 126         lpp->shm_rss = bpp->shm_rss;
 127         lpp->shm_swp = bpp->shm_swp;
 128         lpp->swap_attempts = bpp->swap_attempts;
 129         lpp->swap_successes = bpp->swap_successes;
 130 }
 131
 132 static void
 133 linux_to_bsd_ipc_perm(struct l_ipc64_perm *lpp, struct ipc_perm *bpp)
 134 {
 135
 136         bpp->key = lpp->key;
 137         bpp->uid = lpp->uid;
 138         bpp->gid = lpp->gid;
 139         bpp->cuid = lpp->cuid;
 140         bpp->cgid = lpp->cgid;
 141         bpp->mode = lpp->mode;
 142         bpp->seq = lpp->seq;
 143 }
 144
 145 static void
 146 bsd_to_linux_ipc_perm(struct ipc_perm *bpp, struct l_ipc64_perm *lpp)
 147 {
 148
 149         lpp->key = bpp->key;
 150         lpp->uid = bpp->uid;
 151         lpp->gid = bpp->gid;
 152         lpp->cuid = bpp->cuid;
 153         lpp->cgid = bpp->cgid;
 154         lpp->mode = bpp->mode;
 155         lpp->seq = bpp->seq;
 156 }
 157
 158 struct l_msqid_ds {
 159         struct l_ipc_perm       msg_perm;
 160         l_uintptr_t             msg_first;      /* first message on queue,unused */
 161         l_uintptr_t             msg_last;       /* last message in queue,unused */
 162         l_time_t                msg_stime;      /* last msgsnd time */
 163         l_time_t                msg_rtime;      /* last msgrcv time */
 164         l_time_t                msg_ctime;      /* last change time */
 165         l_ulong                 msg_lcbytes;    /* Reuse junk fields for 32 bit */
 166         l_ulong                 msg_lqbytes;    /* ditto */
 167         l_ushort                msg_cbytes;     /* current number of bytes on queue */
 168         l_ushort                msg_qnum;       /* number of messages in queue */
 169         l_ushort                msg_qbytes;     /* max number of bytes on queue */
 170         l_pid_t                 msg_lspid;      /* pid of last msgsnd */
 171         l_pid_t                 msg_lrpid;      /* last receive pid */
 172 };
 173
 174 struct l_semid_ds {
 175         struct l_ipc_perm       sem_perm;
 176         l_time_t                sem_otime;
 177         l_time_t                sem_ctime;
 178         l_uintptr_t             sem_base;
 179         l_uintptr_t             sem_pending;
 180         l_uintptr_t             sem_pending_last;
 181         l_uintptr_t             undo;
 182         l_ushort                sem_nsems;
 183 };
 184
 185 struct l_shmid_ds {
 186         struct l_ipc_perm       shm_perm;
 187         l_int                   shm_segsz;
 188         l_time_t                shm_atime;
 189         l_time_t                shm_dtime;
 190         l_time_t                shm_ctime;
 191         l_ushort                shm_cpid;
 192         l_ushort                shm_lpid;
 193         l_short                 shm_nattch;
 194         l_ushort                private1;
 195         l_uintptr_t             private2;
 196         l_uintptr_t             private3;
 197 };
 198
 199 static void
 200 linux_to_bsd_semid_ds(struct l_semid64_ds *lsp, struct semid_ds *bsp)
 201 {
 202
 203         linux_to_bsd_ipc_perm(&lsp->sem_perm, &bsp->sem_perm);
 204         bsp->sem_otime = lsp->sem_otime;
 205         bsp->sem_ctime = lsp->sem_ctime;
 206         bsp->sem_nsems = lsp->sem_nsems;
 207 }
 208
 209 static void
 210 bsd_to_linux_semid_ds(struct semid_ds *bsp, struct l_semid64_ds *lsp)
 211 {
 212
 213         bsd_to_linux_ipc_perm(&bsp->sem_perm, &lsp->sem_perm);
 214         lsp->sem_otime = bsp->sem_otime;
 215         lsp->sem_ctime = bsp->sem_ctime;
 216         lsp->sem_nsems = bsp->sem_nsems;
 217 }
 218
 219 static void
 220 linux_to_bsd_shmid_ds(struct l_shmid64_ds *lsp, struct shmid_ds *bsp)
 221 {
 222
 223         linux_to_bsd_ipc_perm(&lsp->shm_perm, &bsp->shm_perm);
 224         bsp->shm_segsz = lsp->shm_segsz;
 225         bsp->shm_lpid = lsp->shm_lpid;
 226         bsp->shm_cpid = lsp->shm_cpid;
 227         bsp->shm_nattch = lsp->shm_nattch;
 228         bsp->shm_atime = lsp->shm_atime;
 229         bsp->shm_dtime = lsp->shm_dtime;
 230         bsp->shm_ctime = lsp->shm_ctime;
 231 }
 232
 233 static void
 234 bsd_to_linux_shmid_ds(struct shmid_ds *bsp, struct l_shmid64_ds *lsp)
 235 {
 236
 237         bsd_to_linux_ipc_perm(&bsp->shm_perm, &lsp->shm_perm);
 238         lsp->shm_segsz = bsp->shm_segsz;
 239         lsp->shm_lpid = bsp->shm_lpid;
 240         lsp->shm_cpid = bsp->shm_cpid;
 241         lsp->shm_nattch = bsp->shm_nattch;
 242         lsp->shm_atime = bsp->shm_atime;
 243         lsp->shm_dtime = bsp->shm_dtime;
 244         lsp->shm_ctime = bsp->shm_ctime;
 245 }
 246
 247 static void
 248 linux_to_bsd_msqid_ds(struct l_msqid64_ds *lsp, struct msqid_ds *bsp)
 249 {
 250
 251         linux_to_bsd_ipc_perm(&lsp->msg_perm, &bsp->msg_perm);
 252         bsp->msg_cbytes = lsp->msg_cbytes;
 253         bsp->msg_qnum = lsp->msg_qnum;
 254         bsp->msg_qbytes = lsp->msg_qbytes;
 255         bsp->msg_lspid = lsp->msg_lspid;
 256         bsp->msg_lrpid = lsp->msg_lrpid;
 257         bsp->msg_stime = lsp->msg_stime;
 258         bsp->msg_rtime = lsp->msg_rtime;
 259         bsp->msg_ctime = lsp->msg_ctime;
 260 }
 261
 262 static void
 263 bsd_to_linux_msqid_ds(struct msqid_ds *bsp, struct l_msqid64_ds *lsp)
 264 {
 265
 266         bsd_to_linux_ipc_perm(&bsp->msg_perm, &lsp->msg_perm);
 267         lsp->msg_cbytes = bsp->msg_cbytes;
 268         lsp->msg_qnum = bsp->msg_qnum;
 269         lsp->msg_qbytes = bsp->msg_qbytes;
 270         lsp->msg_lspid = bsp->msg_lspid;
 271         lsp->msg_lrpid = bsp->msg_lrpid;
 272         lsp->msg_stime = bsp->msg_stime;
 273         lsp->msg_rtime = bsp->msg_rtime;
 274         lsp->msg_ctime = bsp->msg_ctime;
 275 }
 276
 277 static int
 278 linux_ipc64_perm_to_ipc_perm(struct l_ipc64_perm *in, struct l_ipc_perm *out)
 279 {
 280
 281         out->key = in->key;
 282         out->uid = in->uid;
 283         out->gid = in->gid;
 284         out->cuid = in->cuid;
 285         out->cgid = in->cgid;
 286         out->mode = in->mode;
 287         out->seq = in->seq;
 288
 289         /* Linux does not check overflow */
 290         if (out->uid != in->uid || out->gid != in->gid ||
 291             out->cuid != in->cuid || out->cgid != in->cgid ||
 292             out->mode != in->mode)
 293                 return (EOVERFLOW);
 294         else
 295                 return (0);
 296 }
 297
 298 static int
 299 linux_msqid_pullup(l_int ver, struct l_msqid64_ds *linux_msqid64, caddr_t uaddr)
 300 {
 301         struct l_msqid_ds linux_msqid;
 302         int error;
 303
 304         if (ver == LINUX_IPC_64 || SV_CURPROC_FLAG(SV_LP64))
 305                 return (copyin(uaddr, linux_msqid64, sizeof(*linux_msqid64)));
 306         else {
 307                 error = copyin(uaddr, &linux_msqid, sizeof(linux_msqid));
 308                 if (error != 0)
 309                         return (error);
 310
 311                 bzero(linux_msqid64, sizeof(*linux_msqid64));
 312
 313                 linux_msqid64->msg_perm.uid = linux_msqid.msg_perm.uid;
 314                 linux_msqid64->msg_perm.gid = linux_msqid.msg_perm.gid;
 315                 linux_msqid64->msg_perm.mode = linux_msqid.msg_perm.mode;
 316                 if (linux_msqid.msg_qbytes == 0)
 317                         linux_msqid64->msg_qbytes = linux_msqid.msg_lqbytes;
 318                 else
 319                         linux_msqid64->msg_qbytes = linux_msqid.msg_qbytes;
 320                 return (0);
 321         }
 322 }
 323
 324 static int
 325 linux_msqid_pushdown(l_int ver, struct l_msqid64_ds *linux_msqid64, caddr_t uaddr)
 326 {
 327         struct l_msqid_ds linux_msqid;
 328         int error;
 329
 330         if (ver == LINUX_IPC_64 || SV_CURPROC_FLAG(SV_LP64))
 331                 return (copyout(linux_msqid64, uaddr, sizeof(*linux_msqid64)));
 332         else {
 333                 bzero(&linux_msqid, sizeof(linux_msqid));
 334
 335                 error = linux_ipc64_perm_to_ipc_perm(&linux_msqid64->msg_perm,
 336                     &linux_msqid.msg_perm);
 337                 if (error != 0)
 338                         return (error);
 339
 340                 linux_msqid.msg_stime = linux_msqid64->msg_stime;
 341                 linux_msqid.msg_rtime = linux_msqid64->msg_rtime;
 342                 linux_msqid.msg_ctime = linux_msqid64->msg_ctime;
 343
 344                 if (linux_msqid64->msg_cbytes > USHRT_MAX)
 345                         linux_msqid.msg_cbytes = USHRT_MAX;
 346                 else
 347                         linux_msqid.msg_cbytes = linux_msqid64->msg_cbytes;
 348                 linux_msqid.msg_lcbytes = linux_msqid64->msg_cbytes;
 349                 if (linux_msqid64->msg_qnum > USHRT_MAX)
 350                         linux_msqid.msg_qnum = linux_msqid64->msg_qnum;
 351                 else
 352                         linux_msqid.msg_qnum = linux_msqid64->msg_qnum;
 353                 if (linux_msqid64->msg_qbytes > USHRT_MAX)
 354                         linux_msqid.msg_qbytes = linux_msqid64->msg_qbytes;
 355                 else
 356                         linux_msqid.msg_qbytes = linux_msqid64->msg_qbytes;
 357                 linux_msqid.msg_lqbytes = linux_msqid64->msg_qbytes;
 358                 linux_msqid.msg_lspid = linux_msqid64->msg_lspid;
 359                 linux_msqid.msg_lrpid = linux_msqid64->msg_lrpid;
 360
 361                 /* Linux does not check overflow */
 362                 if (linux_msqid.msg_stime != linux_msqid64->msg_stime ||
 363                     linux_msqid.msg_rtime != linux_msqid64->msg_rtime ||
 364                     linux_msqid.msg_ctime != linux_msqid64->msg_ctime)
 365                         return (EOVERFLOW);
 366
 367                 return (copyout(&linux_msqid, uaddr, sizeof(linux_msqid)));
 368         }
 369 }
 370
 371 static int
 372 linux_semid_pullup(l_int ver, struct l_semid64_ds *linux_semid64, caddr_t uaddr)
 373 {
 374         struct l_semid_ds linux_semid;
 375         int error;
 376
 377         if (ver == LINUX_IPC_64 || SV_CURPROC_FLAG(SV_LP64))
 378                 return (copyin(uaddr, linux_semid64, sizeof(*linux_semid64)));
 379         else {
 380                 error = copyin(uaddr, &linux_semid, sizeof(linux_semid));
 381                 if (error != 0)
 382                         return (error);
 383
 384                 bzero(linux_semid64, sizeof(*linux_semid64));
 385
 386                 linux_semid64->sem_perm.uid = linux_semid.sem_perm.uid;
 387                 linux_semid64->sem_perm.gid = linux_semid.sem_perm.gid;
 388                 linux_semid64->sem_perm.mode = linux_semid.sem_perm.mode;
 389                 return (0);
 390         }
 391 }
 392
 393 static int
 394 linux_semid_pushdown(l_int ver, struct l_semid64_ds *linux_semid64, caddr_t uaddr)
 395 {
 396         struct l_semid_ds linux_semid;
 397         int error;
 398
 399         if (ver == LINUX_IPC_64 || SV_CURPROC_FLAG(SV_LP64))
 400                 return (copyout(linux_semid64, uaddr, sizeof(*linux_semid64)));
 401         else {
 402                 bzero(&linux_semid, sizeof(linux_semid));
 403
 404                 error = linux_ipc64_perm_to_ipc_perm(&linux_semid64->sem_perm,
 405                     &linux_semid.sem_perm);
 406                 if (error != 0)
 407                         return (error);
 408
 409                 linux_semid.sem_otime = linux_semid64->sem_otime;
 410                 linux_semid.sem_ctime = linux_semid64->sem_ctime;
 411                 linux_semid.sem_nsems = linux_semid64->sem_nsems;
 412
 413                 /* Linux does not check overflow */
 414                 if (linux_semid.sem_otime != linux_semid64->sem_otime ||
 415                     linux_semid.sem_ctime != linux_semid64->sem_ctime ||
 416                     linux_semid.sem_nsems != linux_semid64->sem_nsems)
 417                         return (EOVERFLOW);
 418
 419                 return (copyout(&linux_semid, uaddr, sizeof(linux_semid)));
 420         }
 421 }
 422
 423 static int
 424 linux_shmid_pullup(l_int ver, struct l_shmid64_ds *linux_shmid64, caddr_t uaddr)
 425 {
 426         struct l_shmid_ds linux_shmid;
 427         int error;
 428
 429         if (ver == LINUX_IPC_64 || SV_CURPROC_FLAG(SV_LP64))
 430                 return (copyin(uaddr, linux_shmid64, sizeof(*linux_shmid64)));
 431         else {
 432                 error = copyin(uaddr, &linux_shmid, sizeof(linux_shmid));
 433                 if (error != 0)
 434                         return (error);
 435
 436                 bzero(linux_shmid64, sizeof(*linux_shmid64));
 437
 438                 linux_shmid64->shm_perm.uid = linux_shmid.shm_perm.uid;
 439                 linux_shmid64->shm_perm.gid = linux_shmid.shm_perm.gid;
 440                 linux_shmid64->shm_perm.mode = linux_shmid.shm_perm.mode;
 441                 return (0);
 442         }
 443 }
 444
 445 static int
 446 linux_shmid_pushdown(l_int ver, struct l_shmid64_ds *linux_shmid64, caddr_t uaddr)
 447 {
 448         struct l_shmid_ds linux_shmid;
 449         int error;
 450
 451         if (ver == LINUX_IPC_64 || SV_CURPROC_FLAG(SV_LP64))
 452                 return (copyout(linux_shmid64, uaddr, sizeof(*linux_shmid64)));
 453         else {
 454                 bzero(&linux_shmid, sizeof(linux_shmid));
 455
 456                 error = linux_ipc64_perm_to_ipc_perm(&linux_shmid64->shm_perm,
 457                     &linux_shmid.shm_perm);
 458                 if (error != 0)
 459                         return (error);
 460
 461                 linux_shmid.shm_segsz = linux_shmid64->shm_segsz;
 462                 linux_shmid.shm_atime = linux_shmid64->shm_atime;
 463                 linux_shmid.shm_dtime = linux_shmid64->shm_dtime;
 464                 linux_shmid.shm_ctime = linux_shmid64->shm_ctime;
 465                 linux_shmid.shm_cpid = linux_shmid64->shm_cpid;
 466                 linux_shmid.shm_lpid = linux_shmid64->shm_lpid;
 467                 linux_shmid.shm_nattch = linux_shmid64->shm_nattch;
 468
 469                 /* Linux does not check overflow */
 470                 if (linux_shmid.shm_segsz != linux_shmid64->shm_segsz ||
 471                     linux_shmid.shm_atime != linux_shmid64->shm_atime ||
 472                     linux_shmid.shm_dtime != linux_shmid64->shm_dtime ||
 473                     linux_shmid.shm_ctime != linux_shmid64->shm_ctime ||
 474                     linux_shmid.shm_cpid != linux_shmid64->shm_cpid ||
 475                     linux_shmid.shm_lpid != linux_shmid64->shm_lpid ||
 476                     linux_shmid.shm_nattch != linux_shmid64->shm_nattch)
 477                         return (EOVERFLOW);
 478
 479                 return (copyout(&linux_shmid, uaddr, sizeof(linux_shmid)));
 480         }
 481 }
 482
 483 static int
 484 linux_shminfo_pushdown(l_int ver, struct l_shminfo64 *linux_shminfo64,
 485     caddr_t uaddr)
 486 {
 487         struct l_shminfo linux_shminfo;
 488
 489         if (ver == LINUX_IPC_64 || SV_CURPROC_FLAG(SV_LP64))
 490                 return (copyout(linux_shminfo64, uaddr,
 491                     sizeof(*linux_shminfo64)));
 492         else {
 493                 bzero(&linux_shminfo, sizeof(linux_shminfo));
 494
 495                 linux_shminfo.shmmax = linux_shminfo64->shmmax;
 496                 linux_shminfo.shmmin = linux_shminfo64->shmmin;
 497                 linux_shminfo.shmmni = linux_shminfo64->shmmni;
 498                 linux_shminfo.shmseg = linux_shminfo64->shmseg;
 499                 linux_shminfo.shmall = linux_shminfo64->shmall;
 500
 501                 return (copyout(&linux_shminfo, uaddr,
 502                     sizeof(linux_shminfo)));
 503         }
 504 }
 505
 506 int
 507 linux_semop(struct thread *td, struct linux_semop_args *args)
 508 {
 509         struct semop_args /* {
 510         int     semid;
 511         struct  sembuf *sops;
 512         int             nsops;
 513         } */ bsd_args;
 514
 515         bsd_args.semid = args->semid;
 516         bsd_args.sops = PTRIN(args->tsops);
 517         bsd_args.nsops = args->nsops;
 518         return (sys_semop(td, &bsd_args));
 519 }
 520
 521 int
 522 linux_semget(struct thread *td, struct linux_semget_args *args)
 523 {
 524         struct semget_args /* {
 525         key_t   key;
 526         int             nsems;
 527         int             semflg;
 528         } */ bsd_args;
 529
 530         if (args->nsems < 0)
 531                 return (EINVAL);
 532         bsd_args.key = args->key;
 533         bsd_args.nsems = args->nsems;
 534         bsd_args.semflg = args->semflg;
 535         return (sys_semget(td, &bsd_args));
 536 }
 537
 538 int
 539 linux_semctl(struct thread *td, struct linux_semctl_args *args)
 540 {
 541         struct l_semid64_ds linux_semid64;
 542         struct l_seminfo linux_seminfo;
 543         struct semid_ds semid;
 544         union semun semun;
 545         register_t rval;
 546         int cmd, error;
 547
 548         switch (args->cmd & ~LINUX_IPC_64) {
 549         case LINUX_IPC_RMID:
 550                 cmd = IPC_RMID;
 551                 break;
 552         case LINUX_GETNCNT:
 553                 cmd = GETNCNT;
 554                 break;
 555         case LINUX_GETPID:
 556                 cmd = GETPID;
 557                 break;
 558         case LINUX_GETVAL:
 559                 cmd = GETVAL;
 560                 break;
 561         case LINUX_GETZCNT:
 562                 cmd = GETZCNT;
 563                 break;
 564         case LINUX_SETVAL:
 565                 cmd = SETVAL;
 566                 semun.val = args->arg.val;
 567                 break;
 568         case LINUX_IPC_SET:
 569                 cmd = IPC_SET;
 570                 error = linux_semid_pullup(args->cmd & LINUX_IPC_64,
 571                     &linux_semid64, PTRIN(args->arg.buf));
 572                 if (error != 0)
 573                         return (error);
 574                 linux_to_bsd_semid_ds(&linux_semid64, &semid);
 575                 semun.buf = &semid;
 576                 return (kern_semctl(td, args->semid, args->semnum, cmd, &semun,
 577                     td->td_retval));
 578         case LINUX_IPC_STAT:
 579                 cmd = IPC_STAT;
 580                 semun.buf = &semid;
 581                 error = kern_semctl(td, args->semid, args->semnum, cmd, &semun,
 582                     &rval);
 583                 if (error != 0)
 584                         return (error);
 585                 bsd_to_linux_semid_ds(&semid, &linux_semid64);
 586                 return (linux_semid_pushdown(args->cmd & LINUX_IPC_64,
 587                     &linux_semid64, PTRIN(args->arg.buf)));
 588         case LINUX_SEM_STAT:
 589                 cmd = SEM_STAT;
 590                 semun.buf = &semid;
 591                 error = kern_semctl(td, args->semid, args->semnum, cmd, &semun,
 592                     &rval);
 593                 if (error != 0)
 594                         return (error);
 595                 bsd_to_linux_semid_ds(&semid, &linux_semid64);
 596                 error = linux_semid_pushdown(args->cmd & LINUX_IPC_64,
 597                     &linux_semid64, PTRIN(args->arg.buf));
 598                 if (error == 0)
 599                         td->td_retval[0] = rval;
 600                 return (error);
 601         case LINUX_IPC_INFO:
 602         case LINUX_SEM_INFO:
 603                 bcopy(&seminfo, &linux_seminfo.semmni, sizeof(linux_seminfo) -
 604                     sizeof(linux_seminfo.semmap) );
 605                 /*
 606                  * Linux does not use the semmap field but populates it with
 607                  * the defined value from SEMMAP, which really is redefined to
 608                  * SEMMNS, which they define as SEMMNI * SEMMSL.  Try to
 609                  * simulate this returning our dynamic semmns value.
 610                  */
 611                 linux_seminfo.semmap = linux_seminfo.semmns;
 612 /* XXX BSD equivalent?
 613 #define used_semids 10
 614 #define used_sems 10
 615                 linux_seminfo.semusz = used_semids;
 616                 linux_seminfo.semaem = used_sems;
 617 */
 618                 error = copyout(&linux_seminfo,
 619                     PTRIN(args->arg.buf), sizeof(linux_seminfo));
 620                 if (error != 0)
 621                         return (error);
 622                 /*
 623                  * TODO: Linux return the last assigned id, not the semmni.
 624                  */
 625                 td->td_retval[0] = seminfo.semmni;
 626                 return (0);
 627         case LINUX_GETALL:
 628                 cmd = GETALL;
 629                 semun.array = PTRIN(args->arg.array);
 630                 break;
 631         case LINUX_SETALL:
 632                 cmd = SETALL;
 633                 semun.array = PTRIN(args->arg.array);
 634                 break;
 635         default:
 636                 linux_msg(td, "ipc type %d is not implemented",
 637                   args->cmd & ~LINUX_IPC_64);
 638                 return (EINVAL);
 639         }
 640         return (kern_semctl(td, args->semid, args->semnum, cmd, &semun,
 641             td->td_retval));
 642 }
 643
 644 int
 645 linux_msgsnd(struct thread *td, struct linux_msgsnd_args *args)
 646 {
 647         const void *msgp;
 648         long mtype;
 649         l_long lmtype;
 650         int error;
 651
 652         if ((l_long)args->msgsz < 0 || args->msgsz > (l_long)msginfo.msgmax)
 653                 return (EINVAL);
 654         msgp = PTRIN(args->msgp);
 655         if ((error = copyin(msgp, &lmtype, sizeof(lmtype))) != 0)
 656                 return (error);
 657         mtype = (long)lmtype;
 658         return (kern_msgsnd(td, args->msqid,
 659             (const char *)msgp + sizeof(lmtype),
 660             args->msgsz, args->msgflg, mtype));
 661 }
 662
 663 int
 664 linux_msgrcv(struct thread *td, struct linux_msgrcv_args *args)
 665 {
 666         void *msgp;
 667         long mtype;
 668         l_long lmtype;
 669         int error;
 670
 671         if ((l_long)args->msgsz < 0 || args->msgsz > (l_long)msginfo.msgmax)
 672                 return (EINVAL);
 673         msgp = PTRIN(args->msgp);
 674         if ((error = kern_msgrcv(td, args->msqid,
 675             (char *)msgp + sizeof(lmtype), args->msgsz,
 676             args->msgtyp, args->msgflg, &mtype)) != 0)
 677                 return (error);
 678         lmtype = (l_long)mtype;
 679         return (copyout(&lmtype, msgp, sizeof(lmtype)));
 680 }
 681
 682 int
 683 linux_msgget(struct thread *td, struct linux_msgget_args *args)
 684 {
 685         struct msgget_args /* {
 686                 key_t   key;
 687                 int     msgflg;
 688         } */ bsd_args;
 689
 690         bsd_args.key = args->key;
 691         bsd_args.msgflg = args->msgflg;
 692         return (sys_msgget(td, &bsd_args));
 693 }
 694
 695 int
 696 linux_msgctl(struct thread *td, struct linux_msgctl_args *args)
 697 {
 698         int error, bsd_cmd;
 699         struct l_msqid64_ds linux_msqid64;
 700         struct msqid_ds bsd_msqid;
 701
 702         bsd_cmd = args->cmd & ~LINUX_IPC_64;
 703         switch (bsd_cmd) {
 704         case LINUX_IPC_INFO:
 705         case LINUX_MSG_INFO: {
 706                 struct l_msginfo linux_msginfo;
 707
 708                 /*
 709                  * XXX MSG_INFO uses the same data structure but returns different
 710                  * dynamic counters in msgpool, msgmap, and msgtql fields.
 711                  */
 712                 linux_msginfo.msgpool = (long)msginfo.msgmni *
 713                     (long)msginfo.msgmnb / 1024L;       /* XXX MSG_INFO. */
 714                 linux_msginfo.msgmap = msginfo.msgmnb;  /* XXX MSG_INFO. */
 715                 linux_msginfo.msgmax = msginfo.msgmax;
 716                 linux_msginfo.msgmnb = msginfo.msgmnb;
 717                 linux_msginfo.msgmni = msginfo.msgmni;
 718                 linux_msginfo.msgssz = msginfo.msgssz;
 719                 linux_msginfo.msgtql = msginfo.msgtql;  /* XXX MSG_INFO. */
 720                 linux_msginfo.msgseg = msginfo.msgseg;
 721                 error = copyout(&linux_msginfo, PTRIN(args->buf),
 722                     sizeof(linux_msginfo));
 723                 if (error == 0)
 724                     td->td_retval[0] = msginfo.msgmni;  /* XXX */
 725
 726                 return (error);
 727         }
 728
 729         /*
 730          * TODO: implement this
 731          * case LINUX_MSG_STAT:
 732          */
 733         case LINUX_IPC_STAT:
 734                 /* NOTHING */
 735                 break;
 736
 737         case LINUX_IPC_SET:
 738                 error = linux_msqid_pullup(args->cmd & LINUX_IPC_64,
 739                     &linux_msqid64, PTRIN(args->buf));
 740                 if (error != 0)
 741                         return (error);
 742                 linux_to_bsd_msqid_ds(&linux_msqid64, &bsd_msqid);
 743                 break;
 744
 745         case LINUX_IPC_RMID:
 746                 /* NOTHING */
 747                 break;
 748
 749         default:
 750                 return (EINVAL);
 751                 break;
 752         }
 753
 754         error = kern_msgctl(td, args->msqid, bsd_cmd, &bsd_msqid);
 755         if (error != 0) {
 756                 if (bsd_cmd == LINUX_IPC_RMID && error == EACCES)
 757                         return (EPERM);
 758                 if (bsd_cmd != LINUX_IPC_RMID || error != EINVAL)
 759                         return (error);
 760         }
 761
 762         if (bsd_cmd == LINUX_IPC_STAT) {
 763                 bsd_to_linux_msqid_ds(&bsd_msqid, &linux_msqid64);
 764                 return (linux_msqid_pushdown(args->cmd & LINUX_IPC_64,
 765                     &linux_msqid64, PTRIN(args->buf)));
 766         }
 767
 768         return (0);
 769 }
 770
 771 int
 772 linux_shmat(struct thread *td, struct linux_shmat_args *args)
 773 {
 774         struct shmat_args /* {
 775                 int shmid;
 776                 void *shmaddr;
 777                 int shmflg;
 778         } */ bsd_args;
 779         int error;
 780 #if defined(__i386__) || (defined(__amd64__) && defined(COMPAT_LINUX32))
 781         l_uintptr_t addr;
 782 #endif
 783
 784         bsd_args.shmid = args->shmid;
 785         bsd_args.shmaddr = PTRIN(args->shmaddr);
 786         bsd_args.shmflg = args->shmflg;
 787         if ((error = sys_shmat(td, &bsd_args)))
 788                 return (error);
 789 #if defined(__i386__) || (defined(__amd64__) && defined(COMPAT_LINUX32))
 790         addr = td->td_retval[0];
 791         if ((error = copyout(&addr, PTRIN(args->raddr), sizeof(addr))))
 792                 return (error);
 793         td->td_retval[0] = 0;
 794 #endif
 795         return (0);
 796 }
 797
 798 int
 799 linux_shmdt(struct thread *td, struct linux_shmdt_args *args)
 800 {
 801         struct shmdt_args /* {
 802                 void *shmaddr;
 803         } */ bsd_args;
 804
 805         bsd_args.shmaddr = PTRIN(args->shmaddr);
 806         return (sys_shmdt(td, &bsd_args));
 807 }
 808
 809 int
 810 linux_shmget(struct thread *td, struct linux_shmget_args *args)
 811 {
 812         struct shmget_args /* {
 813                 key_t key;
 814                 int size;
 815                 int shmflg;
 816         } */ bsd_args;
 817
 818         bsd_args.key = args->key;
 819         bsd_args.size = args->size;
 820         bsd_args.shmflg = args->shmflg;
 821         return (sys_shmget(td, &bsd_args));
 822 }
 823
 824 int
 825 linux_shmctl(struct thread *td, struct linux_shmctl_args *args)
 826 {
 827         struct l_shmid64_ds linux_shmid64;
 828         struct l_shminfo64 linux_shminfo64;
 829         struct l_shm_info linux_shm_info;
 830         struct shmid_ds bsd_shmid;
 831         int error;
 832
 833         switch (args->cmd & ~LINUX_IPC_64) {
 834
 835         case LINUX_IPC_INFO: {
 836                 struct shminfo bsd_shminfo;
 837
 838                 /* Perform shmctl wanting removed segments lookup */
 839                 error = kern_shmctl(td, args->shmid, IPC_INFO,
 840                     (void *)&bsd_shminfo, NULL);
 841                 if (error != 0)
 842                         return (error);
 843
 844                 bsd_to_linux_shminfo(&bsd_shminfo, &linux_shminfo64);
 845
 846                 return (linux_shminfo_pushdown(args->cmd & LINUX_IPC_64,
 847                     &linux_shminfo64, PTRIN(args->buf)));
 848         }
 849
 850         case LINUX_SHM_INFO: {
 851                 struct shm_info bsd_shm_info;
 852
 853                 /* Perform shmctl wanting removed segments lookup */
 854                 error = kern_shmctl(td, args->shmid, SHM_INFO,
 855                     (void *)&bsd_shm_info, NULL);
 856                 if (error != 0)
 857                         return (error);
 858
 859                 bsd_to_linux_shm_info(&bsd_shm_info, &linux_shm_info);
 860
 861                 return (copyout(&linux_shm_info, PTRIN(args->buf),
 862                     sizeof(struct l_shm_info)));
 863         }
 864
 865         case LINUX_IPC_STAT:
 866                 /* Perform shmctl wanting removed segments lookup */
 867                 error = kern_shmctl(td, args->shmid, IPC_STAT,
 868                     (void *)&bsd_shmid, NULL);
 869                 if (error != 0)
 870                         return (error);
 871
 872                 bsd_to_linux_shmid_ds(&bsd_shmid, &linux_shmid64);
 873
 874                 return (linux_shmid_pushdown(args->cmd & LINUX_IPC_64,
 875                     &linux_shmid64, PTRIN(args->buf)));
 876
 877         case LINUX_SHM_STAT:
 878                 /* Perform shmctl wanting removed segments lookup */
 879                 error = kern_shmctl(td, args->shmid, IPC_STAT,
 880                     (void *)&bsd_shmid, NULL);
 881                 if (error != 0)
 882                         return (error);
 883
 884                 bsd_to_linux_shmid_ds(&bsd_shmid, &linux_shmid64);
 885
 886                 return (linux_shmid_pushdown(args->cmd & LINUX_IPC_64,
 887                     &linux_shmid64, PTRIN(args->buf)));
 888
 889         case LINUX_IPC_SET:
 890                 error = linux_shmid_pullup(args->cmd & LINUX_IPC_64,
 891                     &linux_shmid64, PTRIN(args->buf));
 892                 if (error != 0)
 893                         return (error);
 894
 895                 linux_to_bsd_shmid_ds(&linux_shmid64, &bsd_shmid);
 896
 897                 /* Perform shmctl wanting removed segments lookup */
 898                 return (kern_shmctl(td, args->shmid, IPC_SET,
 899                     (void *)&bsd_shmid, NULL));
 900
 901         case LINUX_IPC_RMID: {
 902                 void *buf;
 903
 904                 if (args->buf == 0)
 905                         buf = NULL;
 906                 else {
 907                         error = linux_shmid_pullup(args->cmd & LINUX_IPC_64,
 908                             &linux_shmid64, PTRIN(args->buf));
 909                         if (error != 0)
 910                                 return (error);
 911                         linux_to_bsd_shmid_ds(&linux_shmid64, &bsd_shmid);
 912                         buf = (void *)&bsd_shmid;
 913                 }
 914                 return (kern_shmctl(td, args->shmid, IPC_RMID, buf, NULL));
 915         }
 916
 917         case LINUX_SHM_LOCK:
 918                 /* FALLTHROUGH */
 919         case LINUX_SHM_UNLOCK:
 920                 /* FALLTHROUGH */
 921         default:
 922                 linux_msg(td, "ipc type %d not implemented",
 923                     args->cmd & ~LINUX_IPC_64);
 924                 return (EINVAL);
 925         }
 926 }
 927
 928 MODULE_DEPEND(linux, sysvmsg, 1, 1, 1);
 929 MODULE_DEPEND(linux, sysvsem, 1, 1, 1);
 930 MODULE_DEPEND(linux, sysvshm, 1, 1, 1);