sys/compat/linux/linux_ipc.c

   1 /*-
   2  * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
   3  *
   4  * Copyright (c) 1994-1995 Søren Schmidt
   5  * All rights reserved.
   6  *
   7  * Redistribution and use in source and binary forms, with or without
   8  * modification, are permitted provided that the following conditions
   9  * are met:
  10  * 1. Redistributions of source code must retain the above copyright
  11  *    notice, this list of conditions and the following disclaimer.
  12  * 2. Redistributions in binary form must reproduce the above copyright
  13  *    notice, this list of conditions and the following disclaimer in the
  14  *    documentation and/or other materials provided with the distribution.
  15  *
  16  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
  17  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  18  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  19  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  20  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  21  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  22  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  23  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  24  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  25  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  26  * 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_timer.h>
  55 #include <compat/linux/linux_util.h>
  56
  57 /*
  58  * old, pre 2.4 kernel
  59  */
  60 struct l_ipc_perm {
  61         l_key_t         key;
  62         l_uid16_t       uid;
  63         l_gid16_t       gid;
  64         l_uid16_t       cuid;
  65         l_gid16_t       cgid;
  66         l_ushort        mode;
  67         l_ushort        seq;
  68 };
  69
  70 struct l_seminfo {
  71         l_int semmap;
  72         l_int semmni;
  73         l_int semmns;
  74         l_int semmnu;
  75         l_int semmsl;
  76         l_int semopm;
  77         l_int semume;
  78         l_int semusz;
  79         l_int semvmx;
  80         l_int semaem;
  81 };
  82
  83 struct l_shminfo {
  84         l_int shmmax;
  85         l_int shmmin;
  86         l_int shmmni;
  87         l_int shmseg;
  88         l_int shmall;
  89 };
  90
  91 struct l_shm_info {
  92         l_int used_ids;
  93         l_ulong shm_tot;  /* total allocated shm */
  94         l_ulong shm_rss;  /* total resident shm */
  95         l_ulong shm_swp;  /* total swapped shm */
  96         l_ulong swap_attempts;
  97         l_ulong swap_successes;
  98 };
  99
 100 struct l_msginfo {
 101         l_int msgpool;
 102         l_int msgmap;
 103         l_int msgmax;
 104         l_int msgmnb;
 105         l_int msgmni;
 106         l_int msgssz;
 107         l_int msgtql;
 108         l_ushort msgseg;
 109 };
 110
 111 static void
 112 bsd_to_linux_shminfo( struct shminfo *bpp, struct l_shminfo64 *lpp)
 113 {
 114
 115         lpp->shmmax = bpp->shmmax;
 116         lpp->shmmin = bpp->shmmin;
 117         lpp->shmmni = bpp->shmmni;
 118         lpp->shmseg = bpp->shmseg;
 119         lpp->shmall = bpp->shmall;
 120 }
 121
 122 static void
 123 bsd_to_linux_shm_info( struct shm_info *bpp, struct l_shm_info *lpp)
 124 {
 125
 126         lpp->used_ids = bpp->used_ids;
 127         lpp->shm_tot = bpp->shm_tot;
 128         lpp->shm_rss = bpp->shm_rss;
 129         lpp->shm_swp = bpp->shm_swp;
 130         lpp->swap_attempts = bpp->swap_attempts;
 131         lpp->swap_successes = bpp->swap_successes;
 132 }
 133
 134 static void
 135 linux_to_bsd_ipc_perm(struct l_ipc64_perm *lpp, struct ipc_perm *bpp)
 136 {
 137
 138         bpp->key = lpp->key;
 139         bpp->uid = lpp->uid;
 140         bpp->gid = lpp->gid;
 141         bpp->cuid = lpp->cuid;
 142         bpp->cgid = lpp->cgid;
 143         bpp->mode = lpp->mode;
 144         bpp->seq = lpp->seq;
 145 }
 146
 147 static void
 148 bsd_to_linux_ipc_perm(struct ipc_perm *bpp, struct l_ipc64_perm *lpp)
 149 {
 150
 151         lpp->key = bpp->key;
 152         lpp->uid = bpp->uid;
 153         lpp->gid = bpp->gid;
 154         lpp->cuid = bpp->cuid;
 155         lpp->cgid = bpp->cgid;
 156         lpp->mode = bpp->mode & (S_IRWXU|S_IRWXG|S_IRWXO);
 157         lpp->seq = bpp->seq;
 158 }
 159
 160 struct l_msqid_ds {
 161         struct l_ipc_perm       msg_perm;
 162         l_uintptr_t             msg_first;      /* first message on queue,unused */
 163         l_uintptr_t             msg_last;       /* last message in queue,unused */
 164         l_time_t                msg_stime;      /* last msgsnd time */
 165         l_time_t                msg_rtime;      /* last msgrcv time */
 166         l_time_t                msg_ctime;      /* last change time */
 167         l_ulong                 msg_lcbytes;    /* Reuse junk fields for 32 bit */
 168         l_ulong                 msg_lqbytes;    /* ditto */
 169         l_ushort                msg_cbytes;     /* current number of bytes on queue */
 170         l_ushort                msg_qnum;       /* number of messages in queue */
 171         l_ushort                msg_qbytes;     /* max number of bytes on queue */
 172         l_pid_t                 msg_lspid;      /* pid of last msgsnd */
 173         l_pid_t                 msg_lrpid;      /* last receive pid */
 174 };
 175
 176 struct l_semid_ds {
 177         struct l_ipc_perm       sem_perm;
 178         l_time_t                sem_otime;
 179         l_time_t                sem_ctime;
 180         l_uintptr_t             sem_base;
 181         l_uintptr_t             sem_pending;
 182         l_uintptr_t             sem_pending_last;
 183         l_uintptr_t             undo;
 184         l_ushort                sem_nsems;
 185 };
 186
 187 struct l_shmid_ds {
 188         struct l_ipc_perm       shm_perm;
 189         l_int                   shm_segsz;
 190         l_time_t                shm_atime;
 191         l_time_t                shm_dtime;
 192         l_time_t                shm_ctime;
 193         l_ushort                shm_cpid;
 194         l_ushort                shm_lpid;
 195         l_short                 shm_nattch;
 196         l_ushort                private1;
 197         l_uintptr_t             private2;
 198         l_uintptr_t             private3;
 199 };
 200
 201 static void
 202 linux_to_bsd_semid_ds(struct l_semid64_ds *lsp, struct semid_ds *bsp)
 203 {
 204
 205         linux_to_bsd_ipc_perm(&lsp->sem_perm, &bsp->sem_perm);
 206         bsp->sem_otime = lsp->sem_otime;
 207         bsp->sem_ctime = lsp->sem_ctime;
 208         bsp->sem_nsems = lsp->sem_nsems;
 209 }
 210
 211 static void
 212 bsd_to_linux_semid_ds(struct semid_ds *bsp, struct l_semid64_ds *lsp)
 213 {
 214
 215         bsd_to_linux_ipc_perm(&bsp->sem_perm, &lsp->sem_perm);
 216         lsp->sem_otime = bsp->sem_otime;
 217         lsp->sem_ctime = bsp->sem_ctime;
 218         lsp->sem_nsems = bsp->sem_nsems;
 219 }
 220
 221 static void
 222 linux_to_bsd_shmid_ds(struct l_shmid64_ds *lsp, struct shmid_ds *bsp)
 223 {
 224
 225         linux_to_bsd_ipc_perm(&lsp->shm_perm, &bsp->shm_perm);
 226         bsp->shm_segsz = lsp->shm_segsz;
 227         bsp->shm_lpid = lsp->shm_lpid;
 228         bsp->shm_cpid = lsp->shm_cpid;
 229         bsp->shm_nattch = lsp->shm_nattch;
 230         bsp->shm_atime = lsp->shm_atime;
 231         bsp->shm_dtime = lsp->shm_dtime;
 232         bsp->shm_ctime = lsp->shm_ctime;
 233 }
 234
 235 static void
 236 bsd_to_linux_shmid_ds(struct shmid_ds *bsp, struct l_shmid64_ds *lsp)
 237 {
 238
 239         bsd_to_linux_ipc_perm(&bsp->shm_perm, &lsp->shm_perm);
 240         lsp->shm_segsz = bsp->shm_segsz;
 241         lsp->shm_lpid = bsp->shm_lpid;
 242         lsp->shm_cpid = bsp->shm_cpid;
 243         lsp->shm_nattch = bsp->shm_nattch;
 244         lsp->shm_atime = bsp->shm_atime;
 245         lsp->shm_dtime = bsp->shm_dtime;
 246         lsp->shm_ctime = bsp->shm_ctime;
 247 }
 248
 249 static void
 250 linux_to_bsd_msqid_ds(struct l_msqid64_ds *lsp, struct msqid_ds *bsp)
 251 {
 252
 253         linux_to_bsd_ipc_perm(&lsp->msg_perm, &bsp->msg_perm);
 254         bsp->msg_cbytes = lsp->msg_cbytes;
 255         bsp->msg_qnum = lsp->msg_qnum;
 256         bsp->msg_qbytes = lsp->msg_qbytes;
 257         bsp->msg_lspid = lsp->msg_lspid;
 258         bsp->msg_lrpid = lsp->msg_lrpid;
 259         bsp->msg_stime = lsp->msg_stime;
 260         bsp->msg_rtime = lsp->msg_rtime;
 261         bsp->msg_ctime = lsp->msg_ctime;
 262 }
 263
 264 static void
 265 bsd_to_linux_msqid_ds(struct msqid_ds *bsp, struct l_msqid64_ds *lsp)
 266 {
 267
 268         bsd_to_linux_ipc_perm(&bsp->msg_perm, &lsp->msg_perm);
 269         lsp->msg_cbytes = bsp->msg_cbytes;
 270         lsp->msg_qnum = bsp->msg_qnum;
 271         lsp->msg_qbytes = bsp->msg_qbytes;
 272         lsp->msg_lspid = bsp->msg_lspid;
 273         lsp->msg_lrpid = bsp->msg_lrpid;
 274         lsp->msg_stime = bsp->msg_stime;
 275         lsp->msg_rtime = bsp->msg_rtime;
 276         lsp->msg_ctime = bsp->msg_ctime;
 277 }
 278
 279 static int
 280 linux_ipc64_perm_to_ipc_perm(struct l_ipc64_perm *in, struct l_ipc_perm *out)
 281 {
 282
 283         out->key = in->key;
 284         out->uid = in->uid;
 285         out->gid = in->gid;
 286         out->cuid = in->cuid;
 287         out->cgid = in->cgid;
 288         out->mode = in->mode;
 289         out->seq = in->seq;
 290
 291         /* Linux does not check overflow */
 292         if (out->uid != in->uid || out->gid != in->gid ||
 293             out->cuid != in->cuid || out->cgid != in->cgid ||
 294             out->mode != in->mode)
 295                 return (EOVERFLOW);
 296         else
 297                 return (0);
 298 }
 299
 300 static int
 301 linux_msqid_pullup(l_int ver, struct l_msqid64_ds *linux_msqid64, caddr_t uaddr)
 302 {
 303         struct l_msqid_ds linux_msqid;
 304         int error;
 305
 306         if (ver == LINUX_IPC_64 || SV_CURPROC_FLAG(SV_LP64))
 307                 return (copyin(uaddr, linux_msqid64, sizeof(*linux_msqid64)));
 308
 309         error = copyin(uaddr, &linux_msqid, sizeof(linux_msqid));
 310         if (error != 0)
 311                 return (error);
 312
 313         bzero(linux_msqid64, sizeof(*linux_msqid64));
 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 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
 333         bzero(&linux_msqid, sizeof(linux_msqid));
 334         error = linux_ipc64_perm_to_ipc_perm(&linux_msqid64->msg_perm,
 335             &linux_msqid.msg_perm);
 336         if (error != 0)
 337                 return (error);
 338
 339         linux_msqid.msg_stime = linux_msqid64->msg_stime;
 340         linux_msqid.msg_rtime = linux_msqid64->msg_rtime;
 341         linux_msqid.msg_ctime = linux_msqid64->msg_ctime;
 342
 343         if (linux_msqid64->msg_cbytes > USHRT_MAX)
 344                 linux_msqid.msg_cbytes = USHRT_MAX;
 345         else
 346                 linux_msqid.msg_cbytes = linux_msqid64->msg_cbytes;
 347         linux_msqid.msg_lcbytes = linux_msqid64->msg_cbytes;
 348         if (linux_msqid64->msg_qnum > USHRT_MAX)
 349                 linux_msqid.msg_qnum = USHRT_MAX;
 350         else
 351                 linux_msqid.msg_qnum = linux_msqid64->msg_qnum;
 352         if (linux_msqid64->msg_qbytes > USHRT_MAX)
 353                 linux_msqid.msg_qbytes = USHRT_MAX;
 354         else
 355                 linux_msqid.msg_qbytes = linux_msqid64->msg_qbytes;
 356         linux_msqid.msg_lqbytes = linux_msqid64->msg_qbytes;
 357         linux_msqid.msg_lspid = linux_msqid64->msg_lspid;
 358         linux_msqid.msg_lrpid = linux_msqid64->msg_lrpid;
 359
 360         /* Linux does not check overflow */
 361         if (linux_msqid.msg_stime != linux_msqid64->msg_stime ||
 362             linux_msqid.msg_rtime != linux_msqid64->msg_rtime ||
 363             linux_msqid.msg_ctime != linux_msqid64->msg_ctime)
 364                 return (EOVERFLOW);
 365         return (copyout(&linux_msqid, uaddr, sizeof(linux_msqid)));
 366 }
 367
 368 static int
 369 linux_semid_pullup(l_int ver, struct l_semid64_ds *linux_semid64, caddr_t uaddr)
 370 {
 371         struct l_semid_ds linux_semid;
 372         int error;
 373
 374         if (ver == LINUX_IPC_64 || SV_CURPROC_FLAG(SV_LP64))
 375                 return (copyin(uaddr, linux_semid64, sizeof(*linux_semid64)));
 376         error = copyin(uaddr, &linux_semid, sizeof(linux_semid));
 377         if (error != 0)
 378                 return (error);
 379
 380         bzero(linux_semid64, sizeof(*linux_semid64));
 381         linux_semid64->sem_perm.uid = linux_semid.sem_perm.uid;
 382         linux_semid64->sem_perm.gid = linux_semid.sem_perm.gid;
 383         linux_semid64->sem_perm.mode = linux_semid.sem_perm.mode;
 384         return (0);
 385 }
 386
 387 static int
 388 linux_semid_pushdown(l_int ver, struct l_semid64_ds *linux_semid64, caddr_t uaddr)
 389 {
 390         struct l_semid_ds linux_semid;
 391         int error;
 392
 393         if (ver == LINUX_IPC_64 || SV_CURPROC_FLAG(SV_LP64))
 394                 return (copyout(linux_semid64, uaddr, sizeof(*linux_semid64)));
 395
 396         bzero(&linux_semid, sizeof(linux_semid));
 397                 error = linux_ipc64_perm_to_ipc_perm(&linux_semid64->sem_perm,
 398             &linux_semid.sem_perm);
 399         if (error != 0)
 400                 return (error);
 401
 402         linux_semid.sem_otime = linux_semid64->sem_otime;
 403         linux_semid.sem_ctime = linux_semid64->sem_ctime;
 404         linux_semid.sem_nsems = linux_semid64->sem_nsems;
 405
 406         /* Linux does not check overflow */
 407         if (linux_semid.sem_otime != linux_semid64->sem_otime ||
 408             linux_semid.sem_ctime != linux_semid64->sem_ctime ||
 409             linux_semid.sem_nsems != linux_semid64->sem_nsems)
 410                 return (EOVERFLOW);
 411         return (copyout(&linux_semid, uaddr, sizeof(linux_semid)));
 412 }
 413
 414 static int
 415 linux_shmid_pullup(l_int ver, struct l_shmid64_ds *linux_shmid64, caddr_t uaddr)
 416 {
 417         struct l_shmid_ds linux_shmid;
 418         int error;
 419
 420         if (ver == LINUX_IPC_64 || SV_CURPROC_FLAG(SV_LP64))
 421                 return (copyin(uaddr, linux_shmid64, sizeof(*linux_shmid64)));
 422
 423         error = copyin(uaddr, &linux_shmid, sizeof(linux_shmid));
 424         if (error != 0)
 425                 return (error);
 426
 427         bzero(linux_shmid64, sizeof(*linux_shmid64));
 428         linux_shmid64->shm_perm.uid = linux_shmid.shm_perm.uid;
 429         linux_shmid64->shm_perm.gid = linux_shmid.shm_perm.gid;
 430         linux_shmid64->shm_perm.mode = linux_shmid.shm_perm.mode;
 431         return (0);
 432 }
 433
 434 static int
 435 linux_shmid_pushdown(l_int ver, struct l_shmid64_ds *linux_shmid64, caddr_t uaddr)
 436 {
 437         struct l_shmid_ds linux_shmid;
 438         int error;
 439
 440         if (ver == LINUX_IPC_64 || SV_CURPROC_FLAG(SV_LP64))
 441                 return (copyout(linux_shmid64, uaddr, sizeof(*linux_shmid64)));
 442
 443         bzero(&linux_shmid, sizeof(linux_shmid));
 444         error = linux_ipc64_perm_to_ipc_perm(&linux_shmid64->shm_perm,
 445             &linux_shmid.shm_perm);
 446         if (error != 0)
 447                 return (error);
 448
 449         linux_shmid.shm_segsz = linux_shmid64->shm_segsz;
 450         linux_shmid.shm_atime = linux_shmid64->shm_atime;
 451         linux_shmid.shm_dtime = linux_shmid64->shm_dtime;
 452         linux_shmid.shm_ctime = linux_shmid64->shm_ctime;
 453         linux_shmid.shm_cpid = linux_shmid64->shm_cpid;
 454         linux_shmid.shm_lpid = linux_shmid64->shm_lpid;
 455         linux_shmid.shm_nattch = linux_shmid64->shm_nattch;
 456
 457         /* Linux does not check overflow */
 458         if (linux_shmid.shm_segsz != linux_shmid64->shm_segsz ||
 459             linux_shmid.shm_atime != linux_shmid64->shm_atime ||
 460             linux_shmid.shm_dtime != linux_shmid64->shm_dtime ||
 461             linux_shmid.shm_ctime != linux_shmid64->shm_ctime ||
 462             linux_shmid.shm_cpid != linux_shmid64->shm_cpid ||
 463             linux_shmid.shm_lpid != linux_shmid64->shm_lpid ||
 464             linux_shmid.shm_nattch != linux_shmid64->shm_nattch)
 465                 return (EOVERFLOW);
 466         return (copyout(&linux_shmid, uaddr, sizeof(linux_shmid)));
 467 }
 468
 469 static int
 470 linux_shminfo_pushdown(l_int ver, struct l_shminfo64 *linux_shminfo64,
 471     caddr_t uaddr)
 472 {
 473         struct l_shminfo linux_shminfo;
 474
 475         if (ver == LINUX_IPC_64 || SV_CURPROC_FLAG(SV_LP64))
 476                 return (copyout(linux_shminfo64, uaddr,
 477                     sizeof(*linux_shminfo64)));
 478
 479         bzero(&linux_shminfo, sizeof(linux_shminfo));
 480         linux_shminfo.shmmax = linux_shminfo64->shmmax;
 481         linux_shminfo.shmmin = linux_shminfo64->shmmin;
 482         linux_shminfo.shmmni = linux_shminfo64->shmmni;
 483         linux_shminfo.shmseg = linux_shminfo64->shmseg;
 484         linux_shminfo.shmall = linux_shminfo64->shmall;
 485         return (copyout(&linux_shminfo, uaddr, sizeof(linux_shminfo)));
 486 }
 487
 488 #if defined(__i386__) || (defined(__amd64__) && defined(COMPAT_LINUX32))
 489 int
 490 linux_semtimedop_time64(struct thread *td, struct linux_semtimedop_time64_args *args)
 491 {
 492         struct timespec ts, *tsa;
 493         int error;
 494
 495         if (args->timeout) {
 496                 error = linux_get_timespec64(&ts, args->timeout);
 497                 if (error != 0)
 498                         return (error);
 499                 tsa = &ts;
 500         } else
 501                 tsa = NULL;
 502
 503         return (kern_semop(td, args->semid, PTRIN(args->tsops),
 504             args->nsops, tsa));
 505 }
 506 #endif /* __i386__) || (__amd64__ && COMPAT_LINUX32) */
 507
 508 int
 509 linux_semtimedop(struct thread *td, struct linux_semtimedop_args *args)
 510 {
 511         struct timespec ts, *tsa;
 512         int error;
 513
 514         if (args->timeout) {
 515                 error = linux_get_timespec(&ts, args->timeout);
 516                 if (error != 0)
 517                         return (error);
 518                 tsa = &ts;
 519         } else
 520                 tsa = NULL;
 521
 522         return (kern_semop(td, args->semid, PTRIN(args->tsops),
 523             args->nsops, tsa));
 524 }
 525
 526 int
 527 linux_semget(struct thread *td, struct linux_semget_args *args)
 528 {
 529         struct semget_args bsd_args = {
 530                 .key = args->key,
 531                 .nsems = args->nsems,
 532                 .semflg = args->semflg
 533         };
 534
 535         if (args->nsems < 0)
 536                 return (EINVAL);
 537         return (sys_semget(td, &bsd_args));
 538 }
 539
 540 int
 541 linux_semctl(struct thread *td, struct linux_semctl_args *args)
 542 {
 543         struct l_semid64_ds linux_semid64;
 544         struct l_seminfo linux_seminfo;
 545         struct semid_ds semid;
 546         union semun semun;
 547         register_t rval;
 548         int cmd, error;
 549
 550         memset(&linux_seminfo, 0, sizeof(linux_seminfo));
 551         memset(&linux_semid64, 0, sizeof(linux_semid64));
 552
 553         switch (args->cmd & ~LINUX_IPC_64) {
 554         case LINUX_IPC_RMID:
 555                 cmd = IPC_RMID;
 556                 break;
 557         case LINUX_GETNCNT:
 558                 cmd = GETNCNT;
 559                 break;
 560         case LINUX_GETPID:
 561                 cmd = GETPID;
 562                 break;
 563         case LINUX_GETVAL:
 564                 cmd = GETVAL;
 565                 break;
 566         case LINUX_GETZCNT:
 567                 cmd = GETZCNT;
 568                 break;
 569         case LINUX_SETVAL:
 570                 cmd = SETVAL;
 571                 semun.val = args->arg.val;
 572                 break;
 573         case LINUX_IPC_SET:
 574                 cmd = IPC_SET;
 575                 error = linux_semid_pullup(args->cmd & LINUX_IPC_64,
 576                     &linux_semid64, PTRIN(args->arg.buf));
 577                 if (error != 0)
 578                         return (error);
 579                 linux_to_bsd_semid_ds(&linux_semid64, &semid);
 580                 semun.buf = &semid;
 581                 return (kern_semctl(td, args->semid, args->semnum, cmd, &semun,
 582                     td->td_retval));
 583         case LINUX_IPC_STAT:
 584                 cmd = IPC_STAT;
 585                 semun.buf = &semid;
 586                 error = kern_semctl(td, args->semid, args->semnum, cmd, &semun,
 587                     &rval);
 588                 if (error != 0)
 589                         return (error);
 590                 bsd_to_linux_semid_ds(&semid, &linux_semid64);
 591                 return (linux_semid_pushdown(args->cmd & LINUX_IPC_64,
 592                     &linux_semid64, PTRIN(args->arg.buf)));
 593         case LINUX_SEM_STAT:
 594                 cmd = SEM_STAT;
 595                 semun.buf = &semid;
 596                 error = kern_semctl(td, args->semid, args->semnum, cmd, &semun,
 597                     &rval);
 598                 if (error != 0)
 599                         return (error);
 600                 bsd_to_linux_semid_ds(&semid, &linux_semid64);
 601                 error = linux_semid_pushdown(args->cmd & LINUX_IPC_64,
 602                     &linux_semid64, PTRIN(args->arg.buf));
 603                 if (error == 0)
 604                         td->td_retval[0] = rval;
 605                 return (error);
 606         case LINUX_IPC_INFO:
 607         case LINUX_SEM_INFO:
 608                 bcopy(&seminfo, &linux_seminfo.semmni, sizeof(linux_seminfo) -
 609                     sizeof(linux_seminfo.semmap) );
 610                 /*
 611                  * Linux does not use the semmap field but populates it with
 612                  * the defined value from SEMMAP, which really is redefined to
 613                  * SEMMNS, which they define as SEMMNI * SEMMSL.  Try to
 614                  * simulate this returning our dynamic semmns value.
 615                  */
 616                 linux_seminfo.semmap = linux_seminfo.semmns;
 617 /* XXX BSD equivalent?
 618 #define used_semids 10
 619 #define used_sems 10
 620                 linux_seminfo.semusz = used_semids;
 621                 linux_seminfo.semaem = used_sems;
 622 */
 623                 error = copyout(&linux_seminfo,
 624                     PTRIN(args->arg.buf), sizeof(linux_seminfo));
 625                 if (error != 0)
 626                         return (error);
 627                 /*
 628                  * TODO: Linux return the last assigned id, not the semmni.
 629                  */
 630                 td->td_retval[0] = seminfo.semmni;
 631                 return (0);
 632         case LINUX_GETALL:
 633                 cmd = GETALL;
 634                 semun.array = PTRIN(args->arg.array);
 635                 break;
 636         case LINUX_SETALL:
 637                 cmd = SETALL;
 638                 semun.array = PTRIN(args->arg.array);
 639                 break;
 640         default:
 641                 linux_msg(td, "ipc type %d is not implemented",
 642                   args->cmd & ~LINUX_IPC_64);
 643                 return (EINVAL);
 644         }
 645         return (kern_semctl(td, args->semid, args->semnum, cmd, &semun,
 646             td->td_retval));
 647 }
 648
 649 int
 650 linux_msgsnd(struct thread *td, struct linux_msgsnd_args *args)
 651 {
 652         const void *msgp;
 653         long mtype;
 654         l_long lmtype;
 655         int error;
 656
 657         if ((l_long)args->msgsz < 0 || args->msgsz > (l_long)msginfo.msgmax)
 658                 return (EINVAL);
 659         msgp = PTRIN(args->msgp);
 660         if ((error = copyin(msgp, &lmtype, sizeof(lmtype))) != 0)
 661                 return (error);
 662         mtype = (long)lmtype;
 663         return (kern_msgsnd(td, args->msqid,
 664             (const char *)msgp + sizeof(lmtype),
 665             args->msgsz, args->msgflg, mtype));
 666 }
 667
 668 int
 669 linux_msgrcv(struct thread *td, struct linux_msgrcv_args *args)
 670 {
 671         void *msgp;
 672         long mtype;
 673         l_long lmtype;
 674         int error;
 675
 676         if ((l_long)args->msgsz < 0 || args->msgsz > (l_long)msginfo.msgmax)
 677                 return (EINVAL);
 678         msgp = PTRIN(args->msgp);
 679         if ((error = kern_msgrcv(td, args->msqid,
 680             (char *)msgp + sizeof(lmtype), args->msgsz,
 681             args->msgtyp, args->msgflg, &mtype)) != 0)
 682                 return (error);
 683         lmtype = (l_long)mtype;
 684         return (copyout(&lmtype, msgp, sizeof(lmtype)));
 685 }
 686
 687 int
 688 linux_msgget(struct thread *td, struct linux_msgget_args *args)
 689 {
 690         struct msgget_args bsd_args = {
 691                 .key = args->key,
 692                 .msgflg = args->msgflg
 693         };
 694
 695         return (sys_msgget(td, &bsd_args));
 696 }
 697
 698 int
 699 linux_msgctl(struct thread *td, struct linux_msgctl_args *args)
 700 {
 701         int error, bsd_cmd;
 702         struct l_msqid64_ds linux_msqid64;
 703         struct msqid_ds bsd_msqid;
 704
 705         memset(&linux_msqid64, 0, sizeof(linux_msqid64));
 706
 707         bsd_cmd = args->cmd & ~LINUX_IPC_64;
 708         switch (bsd_cmd) {
 709         case LINUX_IPC_INFO:
 710         case LINUX_MSG_INFO: {
 711                 struct l_msginfo linux_msginfo;
 712
 713                 memset(&linux_msginfo, 0, sizeof(linux_msginfo));
 714                 /*
 715                  * XXX MSG_INFO uses the same data structure but returns different
 716                  * dynamic counters in msgpool, msgmap, and msgtql fields.
 717                  */
 718                 linux_msginfo.msgpool = (long)msginfo.msgmni *
 719                     (long)msginfo.msgmnb / 1024L;       /* XXX MSG_INFO. */
 720                 linux_msginfo.msgmap = msginfo.msgmnb;  /* XXX MSG_INFO. */
 721                 linux_msginfo.msgmax = msginfo.msgmax;
 722                 linux_msginfo.msgmnb = msginfo.msgmnb;
 723                 linux_msginfo.msgmni = msginfo.msgmni;
 724                 linux_msginfo.msgssz = msginfo.msgssz;
 725                 linux_msginfo.msgtql = msginfo.msgtql;  /* XXX MSG_INFO. */
 726                 linux_msginfo.msgseg = msginfo.msgseg;
 727                 error = copyout(&linux_msginfo, PTRIN(args->buf),
 728                     sizeof(linux_msginfo));
 729                 if (error == 0)
 730                     td->td_retval[0] = msginfo.msgmni;  /* XXX */
 731
 732                 return (error);
 733         }
 734
 735         /*
 736          * TODO: implement this
 737          * case LINUX_MSG_STAT:
 738          */
 739         case LINUX_IPC_STAT:
 740                 /* NOTHING */
 741                 break;
 742
 743         case LINUX_IPC_SET:
 744                 error = linux_msqid_pullup(args->cmd & LINUX_IPC_64,
 745                     &linux_msqid64, PTRIN(args->buf));
 746                 if (error != 0)
 747                         return (error);
 748                 linux_to_bsd_msqid_ds(&linux_msqid64, &bsd_msqid);
 749                 break;
 750
 751         case LINUX_IPC_RMID:
 752                 /* NOTHING */
 753                 break;
 754
 755         default:
 756                 return (EINVAL);
 757                 break;
 758         }
 759
 760         error = kern_msgctl(td, args->msqid, bsd_cmd, &bsd_msqid);
 761         if (error != 0) {
 762                 if (bsd_cmd == LINUX_IPC_RMID && error == EACCES)
 763                         return (EPERM);
 764                 if (bsd_cmd != LINUX_IPC_RMID || error != EINVAL)
 765                         return (error);
 766         }
 767
 768         if (bsd_cmd == LINUX_IPC_STAT) {
 769                 bsd_to_linux_msqid_ds(&bsd_msqid, &linux_msqid64);
 770                 return (linux_msqid_pushdown(args->cmd & LINUX_IPC_64,
 771                     &linux_msqid64, PTRIN(args->buf)));
 772         }
 773
 774         return (0);
 775 }
 776
 777 int
 778 linux_shmat(struct thread *td, struct linux_shmat_args *args)
 779 {
 780         struct shmat_args bsd_args = {
 781                 .shmid = args->shmid,
 782                 .shmaddr = PTRIN(args->shmaddr),
 783                 .shmflg = args->shmflg
 784         };
 785
 786         return (sys_shmat(td, &bsd_args));
 787 }
 788
 789 int
 790 linux_shmdt(struct thread *td, struct linux_shmdt_args *args)
 791 {
 792         struct shmdt_args bsd_args = {
 793                 .shmaddr = PTRIN(args->shmaddr)
 794         };
 795
 796         return (sys_shmdt(td, &bsd_args));
 797 }
 798
 799 int
 800 linux_shmget(struct thread *td, struct linux_shmget_args *args)
 801 {
 802         struct shmget_args bsd_args = {
 803                 .key = args->key,
 804                 .size = args->size,
 805                 .shmflg = args->shmflg
 806         };
 807
 808         return (sys_shmget(td, &bsd_args));
 809 }
 810
 811 int
 812 linux_shmctl(struct thread *td, struct linux_shmctl_args *args)
 813 {
 814         struct l_shmid64_ds linux_shmid64;
 815         struct l_shminfo64 linux_shminfo64;
 816         struct l_shm_info linux_shm_info;
 817         struct shmid_ds bsd_shmid;
 818         int error;
 819
 820         memset(&linux_shm_info, 0, sizeof(linux_shm_info));
 821         memset(&linux_shmid64, 0, sizeof(linux_shmid64));
 822         memset(&linux_shminfo64, 0, sizeof(linux_shminfo64));
 823
 824         switch (args->cmd & ~LINUX_IPC_64) {
 825         case LINUX_IPC_INFO: {
 826                 struct shminfo bsd_shminfo;
 827
 828                 /* Perform shmctl wanting removed segments lookup */
 829                 error = kern_shmctl(td, args->shmid, IPC_INFO,
 830                     (void *)&bsd_shminfo, NULL);
 831                 if (error != 0)
 832                         return (error);
 833
 834                 bsd_to_linux_shminfo(&bsd_shminfo, &linux_shminfo64);
 835
 836                 return (linux_shminfo_pushdown(args->cmd & LINUX_IPC_64,
 837                     &linux_shminfo64, PTRIN(args->buf)));
 838         }
 839
 840         case LINUX_SHM_INFO: {
 841                 struct shm_info bsd_shm_info;
 842
 843                 /* Perform shmctl wanting removed segments lookup */
 844                 error = kern_shmctl(td, args->shmid, SHM_INFO,
 845                     (void *)&bsd_shm_info, NULL);
 846                 if (error != 0)
 847                         return (error);
 848
 849                 bsd_to_linux_shm_info(&bsd_shm_info, &linux_shm_info);
 850
 851                 return (copyout(&linux_shm_info, PTRIN(args->buf),
 852                     sizeof(struct l_shm_info)));
 853         }
 854
 855         case LINUX_IPC_STAT:
 856                 /* Perform shmctl wanting removed segments lookup */
 857                 error = kern_shmctl(td, args->shmid, IPC_STAT,
 858                     (void *)&bsd_shmid, NULL);
 859                 if (error != 0)
 860                         return (error);
 861
 862                 bsd_to_linux_shmid_ds(&bsd_shmid, &linux_shmid64);
 863
 864                 return (linux_shmid_pushdown(args->cmd & LINUX_IPC_64,
 865                     &linux_shmid64, PTRIN(args->buf)));
 866
 867         case LINUX_SHM_STAT:
 868                 /* Perform shmctl wanting removed segments lookup */
 869                 error = kern_shmctl(td, args->shmid, IPC_STAT,
 870                     (void *)&bsd_shmid, NULL);
 871                 if (error != 0)
 872                         return (error);
 873
 874                 bsd_to_linux_shmid_ds(&bsd_shmid, &linux_shmid64);
 875
 876                 return (linux_shmid_pushdown(args->cmd & LINUX_IPC_64,
 877                     &linux_shmid64, PTRIN(args->buf)));
 878
 879         case LINUX_IPC_SET:
 880                 error = linux_shmid_pullup(args->cmd & LINUX_IPC_64,
 881                     &linux_shmid64, PTRIN(args->buf));
 882                 if (error != 0)
 883                         return (error);
 884
 885                 linux_to_bsd_shmid_ds(&linux_shmid64, &bsd_shmid);
 886
 887                 /* Perform shmctl wanting removed segments lookup */
 888                 return (kern_shmctl(td, args->shmid, IPC_SET,
 889                     (void *)&bsd_shmid, NULL));
 890
 891         case LINUX_IPC_RMID: {
 892                 void *buf;
 893
 894                 if (args->buf == 0)
 895                         buf = NULL;
 896                 else {
 897                         error = linux_shmid_pullup(args->cmd & LINUX_IPC_64,
 898                             &linux_shmid64, PTRIN(args->buf));
 899                         if (error != 0)
 900                                 return (error);
 901                         linux_to_bsd_shmid_ds(&linux_shmid64, &bsd_shmid);
 902                         buf = (void *)&bsd_shmid;
 903                 }
 904                 return (kern_shmctl(td, args->shmid, IPC_RMID, buf, NULL));
 905         }
 906
 907         case LINUX_SHM_LOCK:
 908                 /* FALLTHROUGH */
 909         case LINUX_SHM_UNLOCK:
 910                 /* FALLTHROUGH */
 911         default:
 912                 linux_msg(td, "ipc type %d not implemented",
 913                     args->cmd & ~LINUX_IPC_64);
 914                 return (EINVAL);
 915         }
 916 }
 917
 918 MODULE_DEPEND(linux, sysvmsg, 1, 1, 1);
 919 MODULE_DEPEND(linux, sysvsem, 1, 1, 1);
 920 MODULE_DEPEND(linux, sysvshm, 1, 1, 1);