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         else {
 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
 315                 linux_msqid64->msg_perm.uid = linux_msqid.msg_perm.uid;
 316                 linux_msqid64->msg_perm.gid = linux_msqid.msg_perm.gid;
 317                 linux_msqid64->msg_perm.mode = linux_msqid.msg_perm.mode;
 318                 if (linux_msqid.msg_qbytes == 0)
 319                         linux_msqid64->msg_qbytes = linux_msqid.msg_lqbytes;
 320                 else
 321                         linux_msqid64->msg_qbytes = linux_msqid.msg_qbytes;
 322                 return (0);
 323         }
 324 }
 325
 326 static int
 327 linux_msqid_pushdown(l_int ver, struct l_msqid64_ds *linux_msqid64, caddr_t uaddr)
 328 {
 329         struct l_msqid_ds linux_msqid;
 330         int error;
 331
 332         if (ver == LINUX_IPC_64 || SV_CURPROC_FLAG(SV_LP64))
 333                 return (copyout(linux_msqid64, uaddr, sizeof(*linux_msqid64)));
 334         else {
 335                 bzero(&linux_msqid, sizeof(linux_msqid));
 336
 337                 error = linux_ipc64_perm_to_ipc_perm(&linux_msqid64->msg_perm,
 338                     &linux_msqid.msg_perm);
 339                 if (error != 0)
 340                         return (error);
 341
 342                 linux_msqid.msg_stime = linux_msqid64->msg_stime;
 343                 linux_msqid.msg_rtime = linux_msqid64->msg_rtime;
 344                 linux_msqid.msg_ctime = linux_msqid64->msg_ctime;
 345
 346                 if (linux_msqid64->msg_cbytes > USHRT_MAX)
 347                         linux_msqid.msg_cbytes = USHRT_MAX;
 348                 else
 349                         linux_msqid.msg_cbytes = linux_msqid64->msg_cbytes;
 350                 linux_msqid.msg_lcbytes = linux_msqid64->msg_cbytes;
 351                 if (linux_msqid64->msg_qnum > USHRT_MAX)
 352                         linux_msqid.msg_qnum = USHRT_MAX;
 353                 else
 354                         linux_msqid.msg_qnum = linux_msqid64->msg_qnum;
 355                 if (linux_msqid64->msg_qbytes > USHRT_MAX)
 356                         linux_msqid.msg_qbytes = USHRT_MAX;
 357                 else
 358                         linux_msqid.msg_qbytes = linux_msqid64->msg_qbytes;
 359                 linux_msqid.msg_lqbytes = linux_msqid64->msg_qbytes;
 360                 linux_msqid.msg_lspid = linux_msqid64->msg_lspid;
 361                 linux_msqid.msg_lrpid = linux_msqid64->msg_lrpid;
 362
 363                 /* Linux does not check overflow */
 364                 if (linux_msqid.msg_stime != linux_msqid64->msg_stime ||
 365                     linux_msqid.msg_rtime != linux_msqid64->msg_rtime ||
 366                     linux_msqid.msg_ctime != linux_msqid64->msg_ctime)
 367                         return (EOVERFLOW);
 368
 369                 return (copyout(&linux_msqid, uaddr, sizeof(linux_msqid)));
 370         }
 371 }
 372
 373 static int
 374 linux_semid_pullup(l_int ver, struct l_semid64_ds *linux_semid64, caddr_t uaddr)
 375 {
 376         struct l_semid_ds linux_semid;
 377         int error;
 378
 379         if (ver == LINUX_IPC_64 || SV_CURPROC_FLAG(SV_LP64))
 380                 return (copyin(uaddr, linux_semid64, sizeof(*linux_semid64)));
 381         else {
 382                 error = copyin(uaddr, &linux_semid, sizeof(linux_semid));
 383                 if (error != 0)
 384                         return (error);
 385
 386                 bzero(linux_semid64, sizeof(*linux_semid64));
 387
 388                 linux_semid64->sem_perm.uid = linux_semid.sem_perm.uid;
 389                 linux_semid64->sem_perm.gid = linux_semid.sem_perm.gid;
 390                 linux_semid64->sem_perm.mode = linux_semid.sem_perm.mode;
 391                 return (0);
 392         }
 393 }
 394
 395 static int
 396 linux_semid_pushdown(l_int ver, struct l_semid64_ds *linux_semid64, caddr_t uaddr)
 397 {
 398         struct l_semid_ds linux_semid;
 399         int error;
 400
 401         if (ver == LINUX_IPC_64 || SV_CURPROC_FLAG(SV_LP64))
 402                 return (copyout(linux_semid64, uaddr, sizeof(*linux_semid64)));
 403         else {
 404                 bzero(&linux_semid, sizeof(linux_semid));
 405
 406                 error = linux_ipc64_perm_to_ipc_perm(&linux_semid64->sem_perm,
 407                     &linux_semid.sem_perm);
 408                 if (error != 0)
 409                         return (error);
 410
 411                 linux_semid.sem_otime = linux_semid64->sem_otime;
 412                 linux_semid.sem_ctime = linux_semid64->sem_ctime;
 413                 linux_semid.sem_nsems = linux_semid64->sem_nsems;
 414
 415                 /* Linux does not check overflow */
 416                 if (linux_semid.sem_otime != linux_semid64->sem_otime ||
 417                     linux_semid.sem_ctime != linux_semid64->sem_ctime ||
 418                     linux_semid.sem_nsems != linux_semid64->sem_nsems)
 419                         return (EOVERFLOW);
 420
 421                 return (copyout(&linux_semid, uaddr, sizeof(linux_semid)));
 422         }
 423 }
 424
 425 static int
 426 linux_shmid_pullup(l_int ver, struct l_shmid64_ds *linux_shmid64, caddr_t uaddr)
 427 {
 428         struct l_shmid_ds linux_shmid;
 429         int error;
 430
 431         if (ver == LINUX_IPC_64 || SV_CURPROC_FLAG(SV_LP64))
 432                 return (copyin(uaddr, linux_shmid64, sizeof(*linux_shmid64)));
 433         else {
 434                 error = copyin(uaddr, &linux_shmid, sizeof(linux_shmid));
 435                 if (error != 0)
 436                         return (error);
 437
 438                 bzero(linux_shmid64, sizeof(*linux_shmid64));
 439
 440                 linux_shmid64->shm_perm.uid = linux_shmid.shm_perm.uid;
 441                 linux_shmid64->shm_perm.gid = linux_shmid.shm_perm.gid;
 442                 linux_shmid64->shm_perm.mode = linux_shmid.shm_perm.mode;
 443                 return (0);
 444         }
 445 }
 446
 447 static int
 448 linux_shmid_pushdown(l_int ver, struct l_shmid64_ds *linux_shmid64, caddr_t uaddr)
 449 {
 450         struct l_shmid_ds linux_shmid;
 451         int error;
 452
 453         if (ver == LINUX_IPC_64 || SV_CURPROC_FLAG(SV_LP64))
 454                 return (copyout(linux_shmid64, uaddr, sizeof(*linux_shmid64)));
 455         else {
 456                 bzero(&linux_shmid, sizeof(linux_shmid));
 457
 458                 error = linux_ipc64_perm_to_ipc_perm(&linux_shmid64->shm_perm,
 459                     &linux_shmid.shm_perm);
 460                 if (error != 0)
 461                         return (error);
 462
 463                 linux_shmid.shm_segsz = linux_shmid64->shm_segsz;
 464                 linux_shmid.shm_atime = linux_shmid64->shm_atime;
 465                 linux_shmid.shm_dtime = linux_shmid64->shm_dtime;
 466                 linux_shmid.shm_ctime = linux_shmid64->shm_ctime;
 467                 linux_shmid.shm_cpid = linux_shmid64->shm_cpid;
 468                 linux_shmid.shm_lpid = linux_shmid64->shm_lpid;
 469                 linux_shmid.shm_nattch = linux_shmid64->shm_nattch;
 470
 471                 /* Linux does not check overflow */
 472                 if (linux_shmid.shm_segsz != linux_shmid64->shm_segsz ||
 473                     linux_shmid.shm_atime != linux_shmid64->shm_atime ||
 474                     linux_shmid.shm_dtime != linux_shmid64->shm_dtime ||
 475                     linux_shmid.shm_ctime != linux_shmid64->shm_ctime ||
 476                     linux_shmid.shm_cpid != linux_shmid64->shm_cpid ||
 477                     linux_shmid.shm_lpid != linux_shmid64->shm_lpid ||
 478                     linux_shmid.shm_nattch != linux_shmid64->shm_nattch)
 479                         return (EOVERFLOW);
 480
 481                 return (copyout(&linux_shmid, uaddr, sizeof(linux_shmid)));
 482         }
 483 }
 484
 485 static int
 486 linux_shminfo_pushdown(l_int ver, struct l_shminfo64 *linux_shminfo64,
 487     caddr_t uaddr)
 488 {
 489         struct l_shminfo linux_shminfo;
 490
 491         if (ver == LINUX_IPC_64 || SV_CURPROC_FLAG(SV_LP64))
 492                 return (copyout(linux_shminfo64, uaddr,
 493                     sizeof(*linux_shminfo64)));
 494         else {
 495                 bzero(&linux_shminfo, sizeof(linux_shminfo));
 496
 497                 linux_shminfo.shmmax = linux_shminfo64->shmmax;
 498                 linux_shminfo.shmmin = linux_shminfo64->shmmin;
 499                 linux_shminfo.shmmni = linux_shminfo64->shmmni;
 500                 linux_shminfo.shmseg = linux_shminfo64->shmseg;
 501                 linux_shminfo.shmall = linux_shminfo64->shmall;
 502
 503                 return (copyout(&linux_shminfo, uaddr,
 504                     sizeof(linux_shminfo)));
 505         }
 506 }
 507
 508 #if defined(__i386__) || (defined(__amd64__) && defined(COMPAT_LINUX32))
 509 int
 510 linux_semtimedop_time64(struct thread *td, struct linux_semtimedop_time64_args *args)
 511 {
 512         struct timespec ts, *tsa;
 513         int error;
 514
 515         if (args->timeout) {
 516                 error = linux_get_timespec64(&ts, args->timeout);
 517                 if (error != 0)
 518                         return (error);
 519                 tsa = &ts;
 520         } else
 521                 tsa = NULL;
 522
 523         return (kern_semop(td, args->semid, PTRIN(args->tsops),
 524             args->nsops, tsa));
 525 }
 526 #endif /* __i386__) || (__amd64__ && COMPAT_LINUX32) */
 527
 528 int
 529 linux_semtimedop(struct thread *td, struct linux_semtimedop_args *args)
 530 {
 531         struct timespec ts, *tsa;
 532         int error;
 533
 534         if (args->timeout) {
 535                 error = linux_get_timespec(&ts, args->timeout);
 536                 if (error != 0)
 537                         return (error);
 538                 tsa = &ts;
 539         } else
 540                 tsa = NULL;
 541
 542         return (kern_semop(td, args->semid, PTRIN(args->tsops),
 543             args->nsops, tsa));
 544 }
 545
 546 int
 547 linux_semget(struct thread *td, struct linux_semget_args *args)
 548 {
 549         struct semget_args /* {
 550         key_t   key;
 551         int             nsems;
 552         int             semflg;
 553         } */ bsd_args;
 554
 555         if (args->nsems < 0)
 556                 return (EINVAL);
 557         bsd_args.key = args->key;
 558         bsd_args.nsems = args->nsems;
 559         bsd_args.semflg = args->semflg;
 560         return (sys_semget(td, &bsd_args));
 561 }
 562
 563 int
 564 linux_semctl(struct thread *td, struct linux_semctl_args *args)
 565 {
 566         struct l_semid64_ds linux_semid64;
 567         struct l_seminfo linux_seminfo;
 568         struct semid_ds semid;
 569         union semun semun;
 570         register_t rval;
 571         int cmd, error;
 572
 573         memset(&linux_seminfo, 0, sizeof(linux_seminfo));
 574         memset(&linux_semid64, 0, sizeof(linux_semid64));
 575
 576         switch (args->cmd & ~LINUX_IPC_64) {
 577         case LINUX_IPC_RMID:
 578                 cmd = IPC_RMID;
 579                 break;
 580         case LINUX_GETNCNT:
 581                 cmd = GETNCNT;
 582                 break;
 583         case LINUX_GETPID:
 584                 cmd = GETPID;
 585                 break;
 586         case LINUX_GETVAL:
 587                 cmd = GETVAL;
 588                 break;
 589         case LINUX_GETZCNT:
 590                 cmd = GETZCNT;
 591                 break;
 592         case LINUX_SETVAL:
 593                 cmd = SETVAL;
 594                 semun.val = args->arg.val;
 595                 break;
 596         case LINUX_IPC_SET:
 597                 cmd = IPC_SET;
 598                 error = linux_semid_pullup(args->cmd & LINUX_IPC_64,
 599                     &linux_semid64, PTRIN(args->arg.buf));
 600                 if (error != 0)
 601                         return (error);
 602                 linux_to_bsd_semid_ds(&linux_semid64, &semid);
 603                 semun.buf = &semid;
 604                 return (kern_semctl(td, args->semid, args->semnum, cmd, &semun,
 605                     td->td_retval));
 606         case LINUX_IPC_STAT:
 607                 cmd = IPC_STAT;
 608                 semun.buf = &semid;
 609                 error = kern_semctl(td, args->semid, args->semnum, cmd, &semun,
 610                     &rval);
 611                 if (error != 0)
 612                         return (error);
 613                 bsd_to_linux_semid_ds(&semid, &linux_semid64);
 614                 return (linux_semid_pushdown(args->cmd & LINUX_IPC_64,
 615                     &linux_semid64, PTRIN(args->arg.buf)));
 616         case LINUX_SEM_STAT:
 617                 cmd = SEM_STAT;
 618                 semun.buf = &semid;
 619                 error = kern_semctl(td, args->semid, args->semnum, cmd, &semun,
 620                     &rval);
 621                 if (error != 0)
 622                         return (error);
 623                 bsd_to_linux_semid_ds(&semid, &linux_semid64);
 624                 error = linux_semid_pushdown(args->cmd & LINUX_IPC_64,
 625                     &linux_semid64, PTRIN(args->arg.buf));
 626                 if (error == 0)
 627                         td->td_retval[0] = rval;
 628                 return (error);
 629         case LINUX_IPC_INFO:
 630         case LINUX_SEM_INFO:
 631                 bcopy(&seminfo, &linux_seminfo.semmni, sizeof(linux_seminfo) -
 632                     sizeof(linux_seminfo.semmap) );
 633                 /*
 634                  * Linux does not use the semmap field but populates it with
 635                  * the defined value from SEMMAP, which really is redefined to
 636                  * SEMMNS, which they define as SEMMNI * SEMMSL.  Try to
 637                  * simulate this returning our dynamic semmns value.
 638                  */
 639                 linux_seminfo.semmap = linux_seminfo.semmns;
 640 /* XXX BSD equivalent?
 641 #define used_semids 10
 642 #define used_sems 10
 643                 linux_seminfo.semusz = used_semids;
 644                 linux_seminfo.semaem = used_sems;
 645 */
 646                 error = copyout(&linux_seminfo,
 647                     PTRIN(args->arg.buf), sizeof(linux_seminfo));
 648                 if (error != 0)
 649                         return (error);
 650                 /*
 651                  * TODO: Linux return the last assigned id, not the semmni.
 652                  */
 653                 td->td_retval[0] = seminfo.semmni;
 654                 return (0);
 655         case LINUX_GETALL:
 656                 cmd = GETALL;
 657                 semun.array = PTRIN(args->arg.array);
 658                 break;
 659         case LINUX_SETALL:
 660                 cmd = SETALL;
 661                 semun.array = PTRIN(args->arg.array);
 662                 break;
 663         default:
 664                 linux_msg(td, "ipc type %d is not implemented",
 665                   args->cmd & ~LINUX_IPC_64);
 666                 return (EINVAL);
 667         }
 668         return (kern_semctl(td, args->semid, args->semnum, cmd, &semun,
 669             td->td_retval));
 670 }
 671
 672 int
 673 linux_msgsnd(struct thread *td, struct linux_msgsnd_args *args)
 674 {
 675         const void *msgp;
 676         long mtype;
 677         l_long lmtype;
 678         int error;
 679
 680         if ((l_long)args->msgsz < 0 || args->msgsz > (l_long)msginfo.msgmax)
 681                 return (EINVAL);
 682         msgp = PTRIN(args->msgp);
 683         if ((error = copyin(msgp, &lmtype, sizeof(lmtype))) != 0)
 684                 return (error);
 685         mtype = (long)lmtype;
 686         return (kern_msgsnd(td, args->msqid,
 687             (const char *)msgp + sizeof(lmtype),
 688             args->msgsz, args->msgflg, mtype));
 689 }
 690
 691 int
 692 linux_msgrcv(struct thread *td, struct linux_msgrcv_args *args)
 693 {
 694         void *msgp;
 695         long mtype;
 696         l_long lmtype;
 697         int error;
 698
 699         if ((l_long)args->msgsz < 0 || args->msgsz > (l_long)msginfo.msgmax)
 700                 return (EINVAL);
 701         msgp = PTRIN(args->msgp);
 702         if ((error = kern_msgrcv(td, args->msqid,
 703             (char *)msgp + sizeof(lmtype), args->msgsz,
 704             args->msgtyp, args->msgflg, &mtype)) != 0)
 705                 return (error);
 706         lmtype = (l_long)mtype;
 707         return (copyout(&lmtype, msgp, sizeof(lmtype)));
 708 }
 709
 710 int
 711 linux_msgget(struct thread *td, struct linux_msgget_args *args)
 712 {
 713         struct msgget_args /* {
 714                 key_t   key;
 715                 int     msgflg;
 716         } */ bsd_args;
 717
 718         bsd_args.key = args->key;
 719         bsd_args.msgflg = args->msgflg;
 720         return (sys_msgget(td, &bsd_args));
 721 }
 722
 723 int
 724 linux_msgctl(struct thread *td, struct linux_msgctl_args *args)
 725 {
 726         int error, bsd_cmd;
 727         struct l_msqid64_ds linux_msqid64;
 728         struct msqid_ds bsd_msqid;
 729
 730         memset(&linux_msqid64, 0, sizeof(linux_msqid64));
 731
 732         bsd_cmd = args->cmd & ~LINUX_IPC_64;
 733         switch (bsd_cmd) {
 734         case LINUX_IPC_INFO:
 735         case LINUX_MSG_INFO: {
 736                 struct l_msginfo linux_msginfo;
 737
 738                 memset(&linux_msginfo, 0, sizeof(linux_msginfo));
 739                 /*
 740                  * XXX MSG_INFO uses the same data structure but returns different
 741                  * dynamic counters in msgpool, msgmap, and msgtql fields.
 742                  */
 743                 linux_msginfo.msgpool = (long)msginfo.msgmni *
 744                     (long)msginfo.msgmnb / 1024L;       /* XXX MSG_INFO. */
 745                 linux_msginfo.msgmap = msginfo.msgmnb;  /* XXX MSG_INFO. */
 746                 linux_msginfo.msgmax = msginfo.msgmax;
 747                 linux_msginfo.msgmnb = msginfo.msgmnb;
 748                 linux_msginfo.msgmni = msginfo.msgmni;
 749                 linux_msginfo.msgssz = msginfo.msgssz;
 750                 linux_msginfo.msgtql = msginfo.msgtql;  /* XXX MSG_INFO. */
 751                 linux_msginfo.msgseg = msginfo.msgseg;
 752                 error = copyout(&linux_msginfo, PTRIN(args->buf),
 753                     sizeof(linux_msginfo));
 754                 if (error == 0)
 755                     td->td_retval[0] = msginfo.msgmni;  /* XXX */
 756
 757                 return (error);
 758         }
 759
 760         /*
 761          * TODO: implement this
 762          * case LINUX_MSG_STAT:
 763          */
 764         case LINUX_IPC_STAT:
 765                 /* NOTHING */
 766                 break;
 767
 768         case LINUX_IPC_SET:
 769                 error = linux_msqid_pullup(args->cmd & LINUX_IPC_64,
 770                     &linux_msqid64, PTRIN(args->buf));
 771                 if (error != 0)
 772                         return (error);
 773                 linux_to_bsd_msqid_ds(&linux_msqid64, &bsd_msqid);
 774                 break;
 775
 776         case LINUX_IPC_RMID:
 777                 /* NOTHING */
 778                 break;
 779
 780         default:
 781                 return (EINVAL);
 782                 break;
 783         }
 784
 785         error = kern_msgctl(td, args->msqid, bsd_cmd, &bsd_msqid);
 786         if (error != 0) {
 787                 if (bsd_cmd == LINUX_IPC_RMID && error == EACCES)
 788                         return (EPERM);
 789                 if (bsd_cmd != LINUX_IPC_RMID || error != EINVAL)
 790                         return (error);
 791         }
 792
 793         if (bsd_cmd == LINUX_IPC_STAT) {
 794                 bsd_to_linux_msqid_ds(&bsd_msqid, &linux_msqid64);
 795                 return (linux_msqid_pushdown(args->cmd & LINUX_IPC_64,
 796                     &linux_msqid64, PTRIN(args->buf)));
 797         }
 798
 799         return (0);
 800 }
 801
 802 int
 803 linux_shmat(struct thread *td, struct linux_shmat_args *args)
 804 {
 805         struct shmat_args /* {
 806                 int shmid;
 807                 void *shmaddr;
 808                 int shmflg;
 809         } */ bsd_args;
 810
 811         bsd_args.shmid = args->shmid;
 812         bsd_args.shmaddr = PTRIN(args->shmaddr);
 813         bsd_args.shmflg = args->shmflg;
 814         return (sys_shmat(td, &bsd_args));
 815 }
 816
 817 int
 818 linux_shmdt(struct thread *td, struct linux_shmdt_args *args)
 819 {
 820         struct shmdt_args /* {
 821                 void *shmaddr;
 822         } */ bsd_args;
 823
 824         bsd_args.shmaddr = PTRIN(args->shmaddr);
 825         return (sys_shmdt(td, &bsd_args));
 826 }
 827
 828 int
 829 linux_shmget(struct thread *td, struct linux_shmget_args *args)
 830 {
 831         struct shmget_args /* {
 832                 key_t key;
 833                 int size;
 834                 int shmflg;
 835         } */ bsd_args;
 836
 837         bsd_args.key = args->key;
 838         bsd_args.size = args->size;
 839         bsd_args.shmflg = args->shmflg;
 840         return (sys_shmget(td, &bsd_args));
 841 }
 842
 843 int
 844 linux_shmctl(struct thread *td, struct linux_shmctl_args *args)
 845 {
 846         struct l_shmid64_ds linux_shmid64;
 847         struct l_shminfo64 linux_shminfo64;
 848         struct l_shm_info linux_shm_info;
 849         struct shmid_ds bsd_shmid;
 850         int error;
 851
 852         memset(&linux_shm_info, 0, sizeof(linux_shm_info));
 853         memset(&linux_shmid64, 0, sizeof(linux_shmid64));
 854         memset(&linux_shminfo64, 0, sizeof(linux_shminfo64));
 855
 856         switch (args->cmd & ~LINUX_IPC_64) {
 857         case LINUX_IPC_INFO: {
 858                 struct shminfo bsd_shminfo;
 859
 860                 /* Perform shmctl wanting removed segments lookup */
 861                 error = kern_shmctl(td, args->shmid, IPC_INFO,
 862                     (void *)&bsd_shminfo, NULL);
 863                 if (error != 0)
 864                         return (error);
 865
 866                 bsd_to_linux_shminfo(&bsd_shminfo, &linux_shminfo64);
 867
 868                 return (linux_shminfo_pushdown(args->cmd & LINUX_IPC_64,
 869                     &linux_shminfo64, PTRIN(args->buf)));
 870         }
 871
 872         case LINUX_SHM_INFO: {
 873                 struct shm_info bsd_shm_info;
 874
 875                 /* Perform shmctl wanting removed segments lookup */
 876                 error = kern_shmctl(td, args->shmid, SHM_INFO,
 877                     (void *)&bsd_shm_info, NULL);
 878                 if (error != 0)
 879                         return (error);
 880
 881                 bsd_to_linux_shm_info(&bsd_shm_info, &linux_shm_info);
 882
 883                 return (copyout(&linux_shm_info, PTRIN(args->buf),
 884                     sizeof(struct l_shm_info)));
 885         }
 886
 887         case LINUX_IPC_STAT:
 888                 /* Perform shmctl wanting removed segments lookup */
 889                 error = kern_shmctl(td, args->shmid, IPC_STAT,
 890                     (void *)&bsd_shmid, NULL);
 891                 if (error != 0)
 892                         return (error);
 893
 894                 bsd_to_linux_shmid_ds(&bsd_shmid, &linux_shmid64);
 895
 896                 return (linux_shmid_pushdown(args->cmd & LINUX_IPC_64,
 897                     &linux_shmid64, PTRIN(args->buf)));
 898
 899         case LINUX_SHM_STAT:
 900                 /* Perform shmctl wanting removed segments lookup */
 901                 error = kern_shmctl(td, args->shmid, IPC_STAT,
 902                     (void *)&bsd_shmid, NULL);
 903                 if (error != 0)
 904                         return (error);
 905
 906                 bsd_to_linux_shmid_ds(&bsd_shmid, &linux_shmid64);
 907
 908                 return (linux_shmid_pushdown(args->cmd & LINUX_IPC_64,
 909                     &linux_shmid64, PTRIN(args->buf)));
 910
 911         case LINUX_IPC_SET:
 912                 error = linux_shmid_pullup(args->cmd & LINUX_IPC_64,
 913                     &linux_shmid64, PTRIN(args->buf));
 914                 if (error != 0)
 915                         return (error);
 916
 917                 linux_to_bsd_shmid_ds(&linux_shmid64, &bsd_shmid);
 918
 919                 /* Perform shmctl wanting removed segments lookup */
 920                 return (kern_shmctl(td, args->shmid, IPC_SET,
 921                     (void *)&bsd_shmid, NULL));
 922
 923         case LINUX_IPC_RMID: {
 924                 void *buf;
 925
 926                 if (args->buf == 0)
 927                         buf = NULL;
 928                 else {
 929                         error = linux_shmid_pullup(args->cmd & LINUX_IPC_64,
 930                             &linux_shmid64, PTRIN(args->buf));
 931                         if (error != 0)
 932                                 return (error);
 933                         linux_to_bsd_shmid_ds(&linux_shmid64, &bsd_shmid);
 934                         buf = (void *)&bsd_shmid;
 935                 }
 936                 return (kern_shmctl(td, args->shmid, IPC_RMID, buf, NULL));
 937         }
 938
 939         case LINUX_SHM_LOCK:
 940                 /* FALLTHROUGH */
 941         case LINUX_SHM_UNLOCK:
 942                 /* FALLTHROUGH */
 943         default:
 944                 linux_msg(td, "ipc type %d not implemented",
 945                     args->cmd & ~LINUX_IPC_64);
 946                 return (EINVAL);
 947         }
 948 }
 949
 950 MODULE_DEPEND(linux, sysvmsg, 1, 1, 1);
 951 MODULE_DEPEND(linux, sysvsem, 1, 1, 1);
 952 MODULE_DEPEND(linux, sysvshm, 1, 1, 1);