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 #include <sys/stat.h>
  42
  43 #include "opt_compat.h"
  44
  45 #ifdef COMPAT_LINUX32
  46 #include <machine/../linux32/linux.h>
  47 #include <machine/../linux32/linux32_proto.h>
  48 #else
  49 #include <machine/../linux/linux.h>
  50 #include <machine/../linux/linux_proto.h>
  51 #endif
  52 #include <compat/linux/linux_ipc.h>
  53 #include <compat/linux/linux_ipc64.h>
  54 #include <compat/linux/linux_util.h>
  55
  56 /*
  57  * old, pre 2.4 kernel
  58  */
  59 struct l_ipc_perm {
  60         l_key_t         key;
  61         l_uid16_t       uid;
  62         l_gid16_t       gid;
  63         l_uid16_t       cuid;
  64         l_gid16_t       cgid;
  65         l_ushort        mode;
  66         l_ushort        seq;
  67 };
  68
  69 struct l_seminfo {
  70         l_int semmap;
  71         l_int semmni;
  72         l_int semmns;
  73         l_int semmnu;
  74         l_int semmsl;
  75         l_int semopm;
  76         l_int semume;
  77         l_int semusz;
  78         l_int semvmx;
  79         l_int semaem;
  80 };
  81
  82 struct l_shminfo {
  83         l_int shmmax;
  84         l_int shmmin;
  85         l_int shmmni;
  86         l_int shmseg;
  87         l_int shmall;
  88 };
  89
  90 struct l_shm_info {
  91         l_int used_ids;
  92         l_ulong shm_tot;  /* total allocated shm */
  93         l_ulong shm_rss;  /* total resident shm */
  94         l_ulong shm_swp;  /* total swapped shm */
  95         l_ulong swap_attempts;
  96         l_ulong swap_successes;
  97 };
  98
  99 struct l_msginfo {
 100         l_int msgpool;
 101         l_int msgmap;
 102         l_int msgmax;
 103         l_int msgmnb;
 104         l_int msgmni;
 105         l_int msgssz;
 106         l_int msgtql;
 107         l_ushort msgseg;
 108 };
 109
 110 static void
 111 bsd_to_linux_shminfo( struct shminfo *bpp, struct l_shminfo64 *lpp)
 112 {
 113
 114         lpp->shmmax = bpp->shmmax;
 115         lpp->shmmin = bpp->shmmin;
 116         lpp->shmmni = bpp->shmmni;
 117         lpp->shmseg = bpp->shmseg;
 118         lpp->shmall = bpp->shmall;
 119 }
 120
 121 static void
 122 bsd_to_linux_shm_info( struct shm_info *bpp, struct l_shm_info *lpp)
 123 {
 124
 125         lpp->used_ids = bpp->used_ids;
 126         lpp->shm_tot = bpp->shm_tot;
 127         lpp->shm_rss = bpp->shm_rss;
 128         lpp->shm_swp = bpp->shm_swp;
 129         lpp->swap_attempts = bpp->swap_attempts;
 130         lpp->swap_successes = bpp->swap_successes;
 131 }
 132
 133 static void
 134 linux_to_bsd_ipc_perm(struct l_ipc64_perm *lpp, struct ipc_perm *bpp)
 135 {
 136
 137         bpp->key = lpp->key;
 138         bpp->uid = lpp->uid;
 139         bpp->gid = lpp->gid;
 140         bpp->cuid = lpp->cuid;
 141         bpp->cgid = lpp->cgid;
 142         bpp->mode = lpp->mode;
 143         bpp->seq = lpp->seq;
 144 }
 145
 146 static void
 147 bsd_to_linux_ipc_perm(struct ipc_perm *bpp, struct l_ipc64_perm *lpp)
 148 {
 149
 150         lpp->key = bpp->key;
 151         lpp->uid = bpp->uid;
 152         lpp->gid = bpp->gid;
 153         lpp->cuid = bpp->cuid;
 154         lpp->cgid = bpp->cgid;
 155         lpp->mode = bpp->mode & (S_IRWXU|S_IRWXG|S_IRWXO);
 156         lpp->seq = bpp->seq;
 157 }
 158
 159 struct l_msqid_ds {
 160         struct l_ipc_perm       msg_perm;
 161         l_uintptr_t             msg_first;      /* first message on queue,unused */
 162         l_uintptr_t             msg_last;       /* last message in queue,unused */
 163         l_time_t                msg_stime;      /* last msgsnd time */
 164         l_time_t                msg_rtime;      /* last msgrcv time */
 165         l_time_t                msg_ctime;      /* last change time */
 166         l_ulong                 msg_lcbytes;    /* Reuse junk fields for 32 bit */
 167         l_ulong                 msg_lqbytes;    /* ditto */
 168         l_ushort                msg_cbytes;     /* current number of bytes on queue */
 169         l_ushort                msg_qnum;       /* number of messages in queue */
 170         l_ushort                msg_qbytes;     /* max number of bytes on queue */
 171         l_pid_t                 msg_lspid;      /* pid of last msgsnd */
 172         l_pid_t                 msg_lrpid;      /* last receive pid */
 173 };
 174
 175 struct l_semid_ds {
 176         struct l_ipc_perm       sem_perm;
 177         l_time_t                sem_otime;
 178         l_time_t                sem_ctime;
 179         l_uintptr_t             sem_base;
 180         l_uintptr_t             sem_pending;
 181         l_uintptr_t             sem_pending_last;
 182         l_uintptr_t             undo;
 183         l_ushort                sem_nsems;
 184 };
 185
 186 struct l_shmid_ds {
 187         struct l_ipc_perm       shm_perm;
 188         l_int                   shm_segsz;
 189         l_time_t                shm_atime;
 190         l_time_t                shm_dtime;
 191         l_time_t                shm_ctime;
 192         l_ushort                shm_cpid;
 193         l_ushort                shm_lpid;
 194         l_short                 shm_nattch;
 195         l_ushort                private1;
 196         l_uintptr_t             private2;
 197         l_uintptr_t             private3;
 198 };
 199
 200 static void
 201 linux_to_bsd_semid_ds(struct l_semid64_ds *lsp, struct semid_ds *bsp)
 202 {
 203
 204         linux_to_bsd_ipc_perm(&lsp->sem_perm, &bsp->sem_perm);
 205         bsp->sem_otime = lsp->sem_otime;
 206         bsp->sem_ctime = lsp->sem_ctime;
 207         bsp->sem_nsems = lsp->sem_nsems;
 208 }
 209
 210 static void
 211 bsd_to_linux_semid_ds(struct semid_ds *bsp, struct l_semid64_ds *lsp)
 212 {
 213
 214         bsd_to_linux_ipc_perm(&bsp->sem_perm, &lsp->sem_perm);
 215         lsp->sem_otime = bsp->sem_otime;
 216         lsp->sem_ctime = bsp->sem_ctime;
 217         lsp->sem_nsems = bsp->sem_nsems;
 218 }
 219
 220 static void
 221 linux_to_bsd_shmid_ds(struct l_shmid64_ds *lsp, struct shmid_ds *bsp)
 222 {
 223
 224         linux_to_bsd_ipc_perm(&lsp->shm_perm, &bsp->shm_perm);
 225         bsp->shm_segsz = lsp->shm_segsz;
 226         bsp->shm_lpid = lsp->shm_lpid;
 227         bsp->shm_cpid = lsp->shm_cpid;
 228         bsp->shm_nattch = lsp->shm_nattch;
 229         bsp->shm_atime = lsp->shm_atime;
 230         bsp->shm_dtime = lsp->shm_dtime;
 231         bsp->shm_ctime = lsp->shm_ctime;
 232 }
 233
 234 static void
 235 bsd_to_linux_shmid_ds(struct shmid_ds *bsp, struct l_shmid64_ds *lsp)
 236 {
 237
 238         bsd_to_linux_ipc_perm(&bsp->shm_perm, &lsp->shm_perm);
 239         lsp->shm_segsz = bsp->shm_segsz;
 240         lsp->shm_lpid = bsp->shm_lpid;
 241         lsp->shm_cpid = bsp->shm_cpid;
 242         lsp->shm_nattch = bsp->shm_nattch;
 243         lsp->shm_atime = bsp->shm_atime;
 244         lsp->shm_dtime = bsp->shm_dtime;
 245         lsp->shm_ctime = bsp->shm_ctime;
 246 }
 247
 248 static void
 249 linux_to_bsd_msqid_ds(struct l_msqid64_ds *lsp, struct msqid_ds *bsp)
 250 {
 251
 252         linux_to_bsd_ipc_perm(&lsp->msg_perm, &bsp->msg_perm);
 253         bsp->msg_cbytes = lsp->msg_cbytes;
 254         bsp->msg_qnum = lsp->msg_qnum;
 255         bsp->msg_qbytes = lsp->msg_qbytes;
 256         bsp->msg_lspid = lsp->msg_lspid;
 257         bsp->msg_lrpid = lsp->msg_lrpid;
 258         bsp->msg_stime = lsp->msg_stime;
 259         bsp->msg_rtime = lsp->msg_rtime;
 260         bsp->msg_ctime = lsp->msg_ctime;
 261 }
 262
 263 static void
 264 bsd_to_linux_msqid_ds(struct msqid_ds *bsp, struct l_msqid64_ds *lsp)
 265 {
 266
 267         bsd_to_linux_ipc_perm(&bsp->msg_perm, &lsp->msg_perm);
 268         lsp->msg_cbytes = bsp->msg_cbytes;
 269         lsp->msg_qnum = bsp->msg_qnum;
 270         lsp->msg_qbytes = bsp->msg_qbytes;
 271         lsp->msg_lspid = bsp->msg_lspid;
 272         lsp->msg_lrpid = bsp->msg_lrpid;
 273         lsp->msg_stime = bsp->msg_stime;
 274         lsp->msg_rtime = bsp->msg_rtime;
 275         lsp->msg_ctime = bsp->msg_ctime;
 276 }
 277
 278 static int
 279 linux_ipc64_perm_to_ipc_perm(struct l_ipc64_perm *in, struct l_ipc_perm *out)
 280 {
 281
 282         out->key = in->key;
 283         out->uid = in->uid;
 284         out->gid = in->gid;
 285         out->cuid = in->cuid;
 286         out->cgid = in->cgid;
 287         out->mode = in->mode;
 288         out->seq = in->seq;
 289
 290         /* Linux does not check overflow */
 291         if (out->uid != in->uid || out->gid != in->gid ||
 292             out->cuid != in->cuid || out->cgid != in->cgid ||
 293             out->mode != in->mode)
 294                 return (EOVERFLOW);
 295         else
 296                 return (0);
 297 }
 298
 299 static int
 300 linux_msqid_pullup(l_int ver, struct l_msqid64_ds *linux_msqid64, caddr_t uaddr)
 301 {
 302         struct l_msqid_ds linux_msqid;
 303         int error;
 304
 305         if (ver == LINUX_IPC_64 || SV_CURPROC_FLAG(SV_LP64))
 306                 return (copyin(uaddr, linux_msqid64, sizeof(*linux_msqid64)));
 307         else {
 308                 error = copyin(uaddr, &linux_msqid, sizeof(linux_msqid));
 309                 if (error != 0)
 310                         return (error);
 311
 312                 bzero(linux_msqid64, sizeof(*linux_msqid64));
 313
 314                 linux_msqid64->msg_perm.uid = linux_msqid.msg_perm.uid;
 315                 linux_msqid64->msg_perm.gid = linux_msqid.msg_perm.gid;
 316                 linux_msqid64->msg_perm.mode = linux_msqid.msg_perm.mode;
 317                 if (linux_msqid.msg_qbytes == 0)
 318                         linux_msqid64->msg_qbytes = linux_msqid.msg_lqbytes;
 319                 else
 320                         linux_msqid64->msg_qbytes = linux_msqid.msg_qbytes;
 321                 return (0);
 322         }
 323 }
 324
 325 static int
 326 linux_msqid_pushdown(l_int ver, struct l_msqid64_ds *linux_msqid64, caddr_t uaddr)
 327 {
 328         struct l_msqid_ds linux_msqid;
 329         int error;
 330
 331         if (ver == LINUX_IPC_64 || SV_CURPROC_FLAG(SV_LP64))
 332                 return (copyout(linux_msqid64, uaddr, sizeof(*linux_msqid64)));
 333         else {
 334                 bzero(&linux_msqid, sizeof(linux_msqid));
 335
 336                 error = linux_ipc64_perm_to_ipc_perm(&linux_msqid64->msg_perm,
 337                     &linux_msqid.msg_perm);
 338                 if (error != 0)
 339                         return (error);
 340
 341                 linux_msqid.msg_stime = linux_msqid64->msg_stime;
 342                 linux_msqid.msg_rtime = linux_msqid64->msg_rtime;
 343                 linux_msqid.msg_ctime = linux_msqid64->msg_ctime;
 344
 345                 if (linux_msqid64->msg_cbytes > USHRT_MAX)
 346                         linux_msqid.msg_cbytes = USHRT_MAX;
 347                 else
 348                         linux_msqid.msg_cbytes = linux_msqid64->msg_cbytes;
 349                 linux_msqid.msg_lcbytes = linux_msqid64->msg_cbytes;
 350                 if (linux_msqid64->msg_qnum > USHRT_MAX)
 351                         linux_msqid.msg_qnum = USHRT_MAX;
 352                 else
 353                         linux_msqid.msg_qnum = linux_msqid64->msg_qnum;
 354                 if (linux_msqid64->msg_qbytes > USHRT_MAX)
 355                         linux_msqid.msg_qbytes = USHRT_MAX;
 356                 else
 357                         linux_msqid.msg_qbytes = linux_msqid64->msg_qbytes;
 358                 linux_msqid.msg_lqbytes = linux_msqid64->msg_qbytes;
 359                 linux_msqid.msg_lspid = linux_msqid64->msg_lspid;
 360                 linux_msqid.msg_lrpid = linux_msqid64->msg_lrpid;
 361
 362                 /* Linux does not check overflow */
 363                 if (linux_msqid.msg_stime != linux_msqid64->msg_stime ||
 364                     linux_msqid.msg_rtime != linux_msqid64->msg_rtime ||
 365                     linux_msqid.msg_ctime != linux_msqid64->msg_ctime)
 366                         return (EOVERFLOW);
 367
 368                 return (copyout(&linux_msqid, uaddr, sizeof(linux_msqid)));
 369         }
 370 }
 371
 372 static int
 373 linux_semid_pullup(l_int ver, struct l_semid64_ds *linux_semid64, caddr_t uaddr)
 374 {
 375         struct l_semid_ds linux_semid;
 376         int error;
 377
 378         if (ver == LINUX_IPC_64 || SV_CURPROC_FLAG(SV_LP64))
 379                 return (copyin(uaddr, linux_semid64, sizeof(*linux_semid64)));
 380         else {
 381                 error = copyin(uaddr, &linux_semid, sizeof(linux_semid));
 382                 if (error != 0)
 383                         return (error);
 384
 385                 bzero(linux_semid64, sizeof(*linux_semid64));
 386
 387                 linux_semid64->sem_perm.uid = linux_semid.sem_perm.uid;
 388                 linux_semid64->sem_perm.gid = linux_semid.sem_perm.gid;
 389                 linux_semid64->sem_perm.mode = linux_semid.sem_perm.mode;
 390                 return (0);
 391         }
 392 }
 393
 394 static int
 395 linux_semid_pushdown(l_int ver, struct l_semid64_ds *linux_semid64, caddr_t uaddr)
 396 {
 397         struct l_semid_ds linux_semid;
 398         int error;
 399
 400         if (ver == LINUX_IPC_64 || SV_CURPROC_FLAG(SV_LP64))
 401                 return (copyout(linux_semid64, uaddr, sizeof(*linux_semid64)));
 402         else {
 403                 bzero(&linux_semid, sizeof(linux_semid));
 404
 405                 error = linux_ipc64_perm_to_ipc_perm(&linux_semid64->sem_perm,
 406                     &linux_semid.sem_perm);
 407                 if (error != 0)
 408                         return (error);
 409
 410                 linux_semid.sem_otime = linux_semid64->sem_otime;
 411                 linux_semid.sem_ctime = linux_semid64->sem_ctime;
 412                 linux_semid.sem_nsems = linux_semid64->sem_nsems;
 413
 414                 /* Linux does not check overflow */
 415                 if (linux_semid.sem_otime != linux_semid64->sem_otime ||
 416                     linux_semid.sem_ctime != linux_semid64->sem_ctime ||
 417                     linux_semid.sem_nsems != linux_semid64->sem_nsems)
 418                         return (EOVERFLOW);
 419
 420                 return (copyout(&linux_semid, uaddr, sizeof(linux_semid)));
 421         }
 422 }
 423
 424 static int
 425 linux_shmid_pullup(l_int ver, struct l_shmid64_ds *linux_shmid64, caddr_t uaddr)
 426 {
 427         struct l_shmid_ds linux_shmid;
 428         int error;
 429
 430         if (ver == LINUX_IPC_64 || SV_CURPROC_FLAG(SV_LP64))
 431                 return (copyin(uaddr, linux_shmid64, sizeof(*linux_shmid64)));
 432         else {
 433                 error = copyin(uaddr, &linux_shmid, sizeof(linux_shmid));
 434                 if (error != 0)
 435                         return (error);
 436
 437                 bzero(linux_shmid64, sizeof(*linux_shmid64));
 438
 439                 linux_shmid64->shm_perm.uid = linux_shmid.shm_perm.uid;
 440                 linux_shmid64->shm_perm.gid = linux_shmid.shm_perm.gid;
 441                 linux_shmid64->shm_perm.mode = linux_shmid.shm_perm.mode;
 442                 return (0);
 443         }
 444 }
 445
 446 static int
 447 linux_shmid_pushdown(l_int ver, struct l_shmid64_ds *linux_shmid64, caddr_t uaddr)
 448 {
 449         struct l_shmid_ds linux_shmid;
 450         int error;
 451
 452         if (ver == LINUX_IPC_64 || SV_CURPROC_FLAG(SV_LP64))
 453                 return (copyout(linux_shmid64, uaddr, sizeof(*linux_shmid64)));
 454         else {
 455                 bzero(&linux_shmid, sizeof(linux_shmid));
 456
 457                 error = linux_ipc64_perm_to_ipc_perm(&linux_shmid64->shm_perm,
 458                     &linux_shmid.shm_perm);
 459                 if (error != 0)
 460                         return (error);
 461
 462                 linux_shmid.shm_segsz = linux_shmid64->shm_segsz;
 463                 linux_shmid.shm_atime = linux_shmid64->shm_atime;
 464                 linux_shmid.shm_dtime = linux_shmid64->shm_dtime;
 465                 linux_shmid.shm_ctime = linux_shmid64->shm_ctime;
 466                 linux_shmid.shm_cpid = linux_shmid64->shm_cpid;
 467                 linux_shmid.shm_lpid = linux_shmid64->shm_lpid;
 468                 linux_shmid.shm_nattch = linux_shmid64->shm_nattch;
 469
 470                 /* Linux does not check overflow */
 471                 if (linux_shmid.shm_segsz != linux_shmid64->shm_segsz ||
 472                     linux_shmid.shm_atime != linux_shmid64->shm_atime ||
 473                     linux_shmid.shm_dtime != linux_shmid64->shm_dtime ||
 474                     linux_shmid.shm_ctime != linux_shmid64->shm_ctime ||
 475                     linux_shmid.shm_cpid != linux_shmid64->shm_cpid ||
 476                     linux_shmid.shm_lpid != linux_shmid64->shm_lpid ||
 477                     linux_shmid.shm_nattch != linux_shmid64->shm_nattch)
 478                         return (EOVERFLOW);
 479
 480                 return (copyout(&linux_shmid, uaddr, sizeof(linux_shmid)));
 481         }
 482 }
 483
 484 static int
 485 linux_shminfo_pushdown(l_int ver, struct l_shminfo64 *linux_shminfo64,
 486     caddr_t uaddr)
 487 {
 488         struct l_shminfo linux_shminfo;
 489
 490         if (ver == LINUX_IPC_64 || SV_CURPROC_FLAG(SV_LP64))
 491                 return (copyout(linux_shminfo64, uaddr,
 492                     sizeof(*linux_shminfo64)));
 493         else {
 494                 bzero(&linux_shminfo, sizeof(linux_shminfo));
 495
 496                 linux_shminfo.shmmax = linux_shminfo64->shmmax;
 497                 linux_shminfo.shmmin = linux_shminfo64->shmmin;
 498                 linux_shminfo.shmmni = linux_shminfo64->shmmni;
 499                 linux_shminfo.shmseg = linux_shminfo64->shmseg;
 500                 linux_shminfo.shmall = linux_shminfo64->shmall;
 501
 502                 return (copyout(&linux_shminfo, uaddr,
 503                     sizeof(linux_shminfo)));
 504         }
 505 }
 506
 507 int
 508 linux_semop(struct thread *td, struct linux_semop_args *args)
 509 {
 510         struct semop_args /* {
 511         int     semid;
 512         struct  sembuf *sops;
 513         int             nsops;
 514         } */ bsd_args;
 515
 516         if (args->nsops < 1 || args->semid < 0)
 517                 return (EINVAL);
 518         bsd_args.semid = args->semid;
 519         bsd_args.sops = PTRIN(args->tsops);
 520         bsd_args.nsops = args->nsops;
 521         return (sys_semop(td, &bsd_args));
 522 }
 523
 524 int
 525 linux_semget(struct thread *td, struct linux_semget_args *args)
 526 {
 527         struct semget_args /* {
 528         key_t   key;
 529         int             nsems;
 530         int             semflg;
 531         } */ bsd_args;
 532
 533         if (args->nsems < 0)
 534                 return (EINVAL);
 535         bsd_args.key = args->key;
 536         bsd_args.nsems = args->nsems;
 537         bsd_args.semflg = args->semflg;
 538         return (sys_semget(td, &bsd_args));
 539 }
 540
 541 int
 542 linux_semctl(struct thread *td, struct linux_semctl_args *args)
 543 {
 544         struct l_semid64_ds linux_semid64;
 545         struct l_seminfo linux_seminfo;
 546         struct semid_ds semid;
 547         union semun semun;
 548         register_t rval;
 549         int cmd, error;
 550
 551         memset(&linux_seminfo, 0, sizeof(linux_seminfo));
 552         memset(&linux_semid64, 0, sizeof(linux_semid64));
 553
 554         switch (args->cmd & ~LINUX_IPC_64) {
 555         case LINUX_IPC_RMID:
 556                 cmd = IPC_RMID;
 557                 break;
 558         case LINUX_GETNCNT:
 559                 cmd = GETNCNT;
 560                 break;
 561         case LINUX_GETPID:
 562                 cmd = GETPID;
 563                 break;
 564         case LINUX_GETVAL:
 565                 cmd = GETVAL;
 566                 break;
 567         case LINUX_GETZCNT:
 568                 cmd = GETZCNT;
 569                 break;
 570         case LINUX_SETVAL:
 571                 cmd = SETVAL;
 572                 semun.val = args->arg.val;
 573                 break;
 574         case LINUX_IPC_SET:
 575                 cmd = IPC_SET;
 576                 error = linux_semid_pullup(args->cmd & LINUX_IPC_64,
 577                     &linux_semid64, PTRIN(args->arg.buf));
 578                 if (error != 0)
 579                         return (error);
 580                 linux_to_bsd_semid_ds(&linux_semid64, &semid);
 581                 semun.buf = &semid;
 582                 return (kern_semctl(td, args->semid, args->semnum, cmd, &semun,
 583                     td->td_retval));
 584         case LINUX_IPC_STAT:
 585                 cmd = IPC_STAT;
 586                 semun.buf = &semid;
 587                 error = kern_semctl(td, args->semid, args->semnum, cmd, &semun,
 588                     &rval);
 589                 if (error != 0)
 590                         return (error);
 591                 bsd_to_linux_semid_ds(&semid, &linux_semid64);
 592                 return (linux_semid_pushdown(args->cmd & LINUX_IPC_64,
 593                     &linux_semid64, PTRIN(args->arg.buf)));
 594         case LINUX_SEM_STAT:
 595                 cmd = SEM_STAT;
 596                 semun.buf = &semid;
 597                 error = kern_semctl(td, args->semid, args->semnum, cmd, &semun,
 598                     &rval);
 599                 if (error != 0)
 600                         return (error);
 601                 bsd_to_linux_semid_ds(&semid, &linux_semid64);
 602                 error = linux_semid_pushdown(args->cmd & LINUX_IPC_64,
 603                     &linux_semid64, PTRIN(args->arg.buf));
 604                 if (error == 0)
 605                         td->td_retval[0] = rval;
 606                 return (error);
 607         case LINUX_IPC_INFO:
 608         case LINUX_SEM_INFO:
 609                 bcopy(&seminfo, &linux_seminfo.semmni, sizeof(linux_seminfo) -
 610                     sizeof(linux_seminfo.semmap) );
 611                 /*
 612                  * Linux does not use the semmap field but populates it with
 613                  * the defined value from SEMMAP, which really is redefined to
 614                  * SEMMNS, which they define as SEMMNI * SEMMSL.  Try to
 615                  * simulate this returning our dynamic semmns value.
 616                  */
 617                 linux_seminfo.semmap = linux_seminfo.semmns;
 618 /* XXX BSD equivalent?
 619 #define used_semids 10
 620 #define used_sems 10
 621                 linux_seminfo.semusz = used_semids;
 622                 linux_seminfo.semaem = used_sems;
 623 */
 624                 error = copyout(&linux_seminfo,
 625                     PTRIN(args->arg.buf), sizeof(linux_seminfo));
 626                 if (error != 0)
 627                         return (error);
 628                 /*
 629                  * TODO: Linux return the last assigned id, not the semmni.
 630                  */
 631                 td->td_retval[0] = seminfo.semmni;
 632                 return (0);
 633         case LINUX_GETALL:
 634                 cmd = GETALL;
 635                 semun.array = PTRIN(args->arg.array);
 636                 break;
 637         case LINUX_SETALL:
 638                 cmd = SETALL;
 639                 semun.array = PTRIN(args->arg.array);
 640                 break;
 641         default:
 642                 linux_msg(td, "ipc type %d is not implemented",
 643                   args->cmd & ~LINUX_IPC_64);
 644                 return (EINVAL);
 645         }
 646         return (kern_semctl(td, args->semid, args->semnum, cmd, &semun,
 647             td->td_retval));
 648 }
 649
 650 int
 651 linux_msgsnd(struct thread *td, struct linux_msgsnd_args *args)
 652 {
 653         const void *msgp;
 654         long mtype;
 655         l_long lmtype;
 656         int error;
 657
 658         if ((l_long)args->msgsz < 0 || args->msgsz > (l_long)msginfo.msgmax)
 659                 return (EINVAL);
 660         msgp = PTRIN(args->msgp);
 661         if ((error = copyin(msgp, &lmtype, sizeof(lmtype))) != 0)
 662                 return (error);
 663         mtype = (long)lmtype;
 664         return (kern_msgsnd(td, args->msqid,
 665             (const char *)msgp + sizeof(lmtype),
 666             args->msgsz, args->msgflg, mtype));
 667 }
 668
 669 int
 670 linux_msgrcv(struct thread *td, struct linux_msgrcv_args *args)
 671 {
 672         void *msgp;
 673         long mtype;
 674         l_long lmtype;
 675         int error;
 676
 677         if ((l_long)args->msgsz < 0 || args->msgsz > (l_long)msginfo.msgmax)
 678                 return (EINVAL);
 679         msgp = PTRIN(args->msgp);
 680         if ((error = kern_msgrcv(td, args->msqid,
 681             (char *)msgp + sizeof(lmtype), args->msgsz,
 682             args->msgtyp, args->msgflg, &mtype)) != 0)
 683                 return (error);
 684         lmtype = (l_long)mtype;
 685         return (copyout(&lmtype, msgp, sizeof(lmtype)));
 686 }
 687
 688 int
 689 linux_msgget(struct thread *td, struct linux_msgget_args *args)
 690 {
 691         struct msgget_args /* {
 692                 key_t   key;
 693                 int     msgflg;
 694         } */ bsd_args;
 695
 696         bsd_args.key = args->key;
 697         bsd_args.msgflg = args->msgflg;
 698         return (sys_msgget(td, &bsd_args));
 699 }
 700
 701 int
 702 linux_msgctl(struct thread *td, struct linux_msgctl_args *args)
 703 {
 704         int error, bsd_cmd;
 705         struct l_msqid64_ds linux_msqid64;
 706         struct msqid_ds bsd_msqid;
 707
 708         memset(&linux_msqid64, 0, sizeof(linux_msqid64));
 709
 710         bsd_cmd = args->cmd & ~LINUX_IPC_64;
 711         switch (bsd_cmd) {
 712         case LINUX_IPC_INFO:
 713         case LINUX_MSG_INFO: {
 714                 struct l_msginfo linux_msginfo;
 715
 716                 memset(&linux_msginfo, 0, sizeof(linux_msginfo));
 717                 /*
 718                  * XXX MSG_INFO uses the same data structure but returns different
 719                  * dynamic counters in msgpool, msgmap, and msgtql fields.
 720                  */
 721                 linux_msginfo.msgpool = (long)msginfo.msgmni *
 722                     (long)msginfo.msgmnb / 1024L;       /* XXX MSG_INFO. */
 723                 linux_msginfo.msgmap = msginfo.msgmnb;  /* XXX MSG_INFO. */
 724                 linux_msginfo.msgmax = msginfo.msgmax;
 725                 linux_msginfo.msgmnb = msginfo.msgmnb;
 726                 linux_msginfo.msgmni = msginfo.msgmni;
 727                 linux_msginfo.msgssz = msginfo.msgssz;
 728                 linux_msginfo.msgtql = msginfo.msgtql;  /* XXX MSG_INFO. */
 729                 linux_msginfo.msgseg = msginfo.msgseg;
 730                 error = copyout(&linux_msginfo, PTRIN(args->buf),
 731                     sizeof(linux_msginfo));
 732                 if (error == 0)
 733                     td->td_retval[0] = msginfo.msgmni;  /* XXX */
 734
 735                 return (error);
 736         }
 737
 738         /*
 739          * TODO: implement this
 740          * case LINUX_MSG_STAT:
 741          */
 742         case LINUX_IPC_STAT:
 743                 /* NOTHING */
 744                 break;
 745
 746         case LINUX_IPC_SET:
 747                 error = linux_msqid_pullup(args->cmd & LINUX_IPC_64,
 748                     &linux_msqid64, PTRIN(args->buf));
 749                 if (error != 0)
 750                         return (error);
 751                 linux_to_bsd_msqid_ds(&linux_msqid64, &bsd_msqid);
 752                 break;
 753
 754         case LINUX_IPC_RMID:
 755                 /* NOTHING */
 756                 break;
 757
 758         default:
 759                 return (EINVAL);
 760                 break;
 761         }
 762
 763         error = kern_msgctl(td, args->msqid, bsd_cmd, &bsd_msqid);
 764         if (error != 0) {
 765                 if (bsd_cmd == LINUX_IPC_RMID && error == EACCES)
 766                         return (EPERM);
 767                 if (bsd_cmd != LINUX_IPC_RMID || error != EINVAL)
 768                         return (error);
 769         }
 770
 771         if (bsd_cmd == LINUX_IPC_STAT) {
 772                 bsd_to_linux_msqid_ds(&bsd_msqid, &linux_msqid64);
 773                 return (linux_msqid_pushdown(args->cmd & LINUX_IPC_64,
 774                     &linux_msqid64, PTRIN(args->buf)));
 775         }
 776
 777         return (0);
 778 }
 779
 780 int
 781 linux_shmat(struct thread *td, struct linux_shmat_args *args)
 782 {
 783         struct shmat_args /* {
 784                 int shmid;
 785                 void *shmaddr;
 786                 int shmflg;
 787         } */ bsd_args;
 788         int error;
 789 #if defined(__i386__) || (defined(__amd64__) && defined(COMPAT_LINUX32))
 790         l_uintptr_t addr;
 791 #endif
 792
 793         bsd_args.shmid = args->shmid;
 794         bsd_args.shmaddr = PTRIN(args->shmaddr);
 795         bsd_args.shmflg = args->shmflg;
 796         if ((error = sys_shmat(td, &bsd_args)))
 797                 return (error);
 798 #if defined(__i386__) || (defined(__amd64__) && defined(COMPAT_LINUX32))
 799         addr = td->td_retval[0];
 800         if ((error = copyout(&addr, PTRIN(args->raddr), sizeof(addr))))
 801                 return (error);
 802         td->td_retval[0] = 0;
 803 #endif
 804         return (0);
 805 }
 806
 807 int
 808 linux_shmdt(struct thread *td, struct linux_shmdt_args *args)
 809 {
 810         struct shmdt_args /* {
 811                 void *shmaddr;
 812         } */ bsd_args;
 813
 814         bsd_args.shmaddr = PTRIN(args->shmaddr);
 815         return (sys_shmdt(td, &bsd_args));
 816 }
 817
 818 int
 819 linux_shmget(struct thread *td, struct linux_shmget_args *args)
 820 {
 821         struct shmget_args /* {
 822                 key_t key;
 823                 int size;
 824                 int shmflg;
 825         } */ bsd_args;
 826
 827         bsd_args.key = args->key;
 828         bsd_args.size = args->size;
 829         bsd_args.shmflg = args->shmflg;
 830         return (sys_shmget(td, &bsd_args));
 831 }
 832
 833 int
 834 linux_shmctl(struct thread *td, struct linux_shmctl_args *args)
 835 {
 836         struct l_shmid64_ds linux_shmid64;
 837         struct l_shminfo64 linux_shminfo64;
 838         struct l_shm_info linux_shm_info;
 839         struct shmid_ds bsd_shmid;
 840         int error;
 841
 842         memset(&linux_shm_info, 0, sizeof(linux_shm_info));
 843         memset(&linux_shmid64, 0, sizeof(linux_shmid64));
 844         memset(&linux_shminfo64, 0, sizeof(linux_shminfo64));
 845
 846         switch (args->cmd & ~LINUX_IPC_64) {
 847
 848         case LINUX_IPC_INFO: {
 849                 struct shminfo bsd_shminfo;
 850
 851                 /* Perform shmctl wanting removed segments lookup */
 852                 error = kern_shmctl(td, args->shmid, IPC_INFO,
 853                     (void *)&bsd_shminfo, NULL);
 854                 if (error != 0)
 855                         return (error);
 856
 857                 bsd_to_linux_shminfo(&bsd_shminfo, &linux_shminfo64);
 858
 859                 return (linux_shminfo_pushdown(args->cmd & LINUX_IPC_64,
 860                     &linux_shminfo64, PTRIN(args->buf)));
 861         }
 862
 863         case LINUX_SHM_INFO: {
 864                 struct shm_info bsd_shm_info;
 865
 866                 /* Perform shmctl wanting removed segments lookup */
 867                 error = kern_shmctl(td, args->shmid, SHM_INFO,
 868                     (void *)&bsd_shm_info, NULL);
 869                 if (error != 0)
 870                         return (error);
 871
 872                 bsd_to_linux_shm_info(&bsd_shm_info, &linux_shm_info);
 873
 874                 return (copyout(&linux_shm_info, PTRIN(args->buf),
 875                     sizeof(struct l_shm_info)));
 876         }
 877
 878         case LINUX_IPC_STAT:
 879                 /* Perform shmctl wanting removed segments lookup */
 880                 error = kern_shmctl(td, args->shmid, IPC_STAT,
 881                     (void *)&bsd_shmid, NULL);
 882                 if (error != 0)
 883                         return (error);
 884
 885                 bsd_to_linux_shmid_ds(&bsd_shmid, &linux_shmid64);
 886
 887                 return (linux_shmid_pushdown(args->cmd & LINUX_IPC_64,
 888                     &linux_shmid64, PTRIN(args->buf)));
 889
 890         case LINUX_SHM_STAT:
 891                 /* Perform shmctl wanting removed segments lookup */
 892                 error = kern_shmctl(td, args->shmid, IPC_STAT,
 893                     (void *)&bsd_shmid, NULL);
 894                 if (error != 0)
 895                         return (error);
 896
 897                 bsd_to_linux_shmid_ds(&bsd_shmid, &linux_shmid64);
 898
 899                 return (linux_shmid_pushdown(args->cmd & LINUX_IPC_64,
 900                     &linux_shmid64, PTRIN(args->buf)));
 901
 902         case LINUX_IPC_SET:
 903                 error = linux_shmid_pullup(args->cmd & LINUX_IPC_64,
 904                     &linux_shmid64, PTRIN(args->buf));
 905                 if (error != 0)
 906                         return (error);
 907
 908                 linux_to_bsd_shmid_ds(&linux_shmid64, &bsd_shmid);
 909
 910                 /* Perform shmctl wanting removed segments lookup */
 911                 return (kern_shmctl(td, args->shmid, IPC_SET,
 912                     (void *)&bsd_shmid, NULL));
 913
 914         case LINUX_IPC_RMID: {
 915                 void *buf;
 916
 917                 if (args->buf == 0)
 918                         buf = NULL;
 919                 else {
 920                         error = linux_shmid_pullup(args->cmd & LINUX_IPC_64,
 921                             &linux_shmid64, PTRIN(args->buf));
 922                         if (error != 0)
 923                                 return (error);
 924                         linux_to_bsd_shmid_ds(&linux_shmid64, &bsd_shmid);
 925                         buf = (void *)&bsd_shmid;
 926                 }
 927                 return (kern_shmctl(td, args->shmid, IPC_RMID, buf, NULL));
 928         }
 929
 930         case LINUX_SHM_LOCK:
 931                 /* FALLTHROUGH */
 932         case LINUX_SHM_UNLOCK:
 933                 /* FALLTHROUGH */
 934         default:
 935                 linux_msg(td, "ipc type %d not implemented",
 936                     args->cmd & ~LINUX_IPC_64);
 937                 return (EINVAL);
 938         }
 939 }
 940
 941 MODULE_DEPEND(linux, sysvmsg, 1, 1, 1);
 942 MODULE_DEPEND(linux, sysvsem, 1, 1, 1);
 943 MODULE_DEPEND(linux, sysvshm, 1, 1, 1);