sys/compat/linux/linux_ipc.c

   1 /*-
   2  * SPDX-License-Identifier: BSD-2-Clause
   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/limits.h>
  34 #include <sys/msg.h>
  35 #include <sys/proc.h>
  36 #include <sys/sem.h>
  37 #include <sys/shm.h>
  38 #include <sys/stat.h>
  39 #include <sys/syscallsubr.h>
  40 #include <sys/sysent.h>
  41 #include <sys/sysproto.h>
  42
  43 #ifdef COMPAT_LINUX32
  44 #include <machine/../linux32/linux.h>
  45 #include <machine/../linux32/linux32_proto.h>
  46 #else
  47 #include <machine/../linux/linux.h>
  48 #include <machine/../linux/linux_proto.h>
  49 #endif
  50 #include <compat/linux/linux_ipc.h>
  51 #include <compat/linux/linux_ipc64.h>
  52 #include <compat/linux/linux_time.h>
  53 #include <compat/linux/linux_util.h>
  54
  55 /*
  56  * old, pre 2.4 kernel
  57  */
  58 struct l_ipc_perm {
  59         l_key_t         key;
  60         l_uid16_t       uid;
  61         l_gid16_t       gid;
  62         l_uid16_t       cuid;
  63         l_gid16_t       cgid;
  64         l_ushort        mode;
  65         l_ushort        seq;
  66 };
  67
  68 struct l_seminfo {
  69         l_int semmap;
  70         l_int semmni;
  71         l_int semmns;
  72         l_int semmnu;
  73         l_int semmsl;
  74         l_int semopm;
  75         l_int semume;
  76         l_int semusz;
  77         l_int semvmx;
  78         l_int semaem;
  79 };
  80
  81 struct l_shminfo {
  82         l_int shmmax;
  83         l_int shmmin;
  84         l_int shmmni;
  85         l_int shmseg;
  86         l_int shmall;
  87 };
  88
  89 struct l_shm_info {
  90         l_int used_ids;
  91         l_ulong shm_tot;  /* total allocated shm */
  92         l_ulong shm_rss;  /* total resident shm */
  93         l_ulong shm_swp;  /* total swapped shm */
  94         l_ulong swap_attempts;
  95         l_ulong swap_successes;
  96 };
  97
  98 struct l_msginfo {
  99         l_int msgpool;
 100         l_int msgmap;
 101         l_int msgmax;
 102         l_int msgmnb;
 103         l_int msgmni;
 104         l_int msgssz;
 105         l_int msgtql;
 106         l_ushort msgseg;
 107 };
 108
 109 static void
 110 bsd_to_linux_shminfo( struct shminfo *bpp, struct l_shminfo64 *lpp)
 111 {
 112
 113         lpp->shmmax = bpp->shmmax;
 114         lpp->shmmin = bpp->shmmin;
 115         lpp->shmmni = bpp->shmmni;
 116         lpp->shmseg = bpp->shmseg;
 117         lpp->shmall = bpp->shmall;
 118 }
 119
 120 static void
 121 bsd_to_linux_shm_info( struct shm_info *bpp, struct l_shm_info *lpp)
 122 {
 123
 124         lpp->used_ids = bpp->used_ids;
 125         lpp->shm_tot = bpp->shm_tot;
 126         lpp->shm_rss = bpp->shm_rss;
 127         lpp->shm_swp = bpp->shm_swp;
 128         lpp->swap_attempts = bpp->swap_attempts;
 129         lpp->swap_successes = bpp->swap_successes;
 130 }
 131
 132 static void
 133 linux_to_bsd_ipc_perm(struct l_ipc64_perm *lpp, struct ipc_perm *bpp)
 134 {
 135
 136         bpp->key = lpp->key;
 137         bpp->uid = lpp->uid;
 138         bpp->gid = lpp->gid;
 139         bpp->cuid = lpp->cuid;
 140         bpp->cgid = lpp->cgid;
 141         bpp->mode = lpp->mode;
 142         bpp->seq = lpp->seq;
 143 }
 144
 145 static void
 146 bsd_to_linux_ipc_perm(struct ipc_perm *bpp, struct l_ipc64_perm *lpp)
 147 {
 148
 149         lpp->key = bpp->key;
 150         lpp->uid = bpp->uid;
 151         lpp->gid = bpp->gid;
 152         lpp->cuid = bpp->cuid;
 153         lpp->cgid = bpp->cgid;
 154         lpp->mode = bpp->mode & (S_IRWXU|S_IRWXG|S_IRWXO);
 155         lpp->seq = bpp->seq;
 156 }
 157
 158 struct l_msqid_ds {
 159         struct l_ipc_perm       msg_perm;
 160         l_uintptr_t             msg_first;      /* first message on queue,unused */
 161         l_uintptr_t             msg_last;       /* last message in queue,unused */
 162         l_time_t                msg_stime;      /* last msgsnd time */
 163         l_time_t                msg_rtime;      /* last msgrcv time */
 164         l_time_t                msg_ctime;      /* last change time */
 165         l_ulong                 msg_lcbytes;    /* Reuse junk fields for 32 bit */
 166         l_ulong                 msg_lqbytes;    /* ditto */
 167         l_ushort                msg_cbytes;     /* current number of bytes on queue */
 168         l_ushort                msg_qnum;       /* number of messages in queue */
 169         l_ushort                msg_qbytes;     /* max number of bytes on queue */
 170         l_pid_t                 msg_lspid;      /* pid of last msgsnd */
 171         l_pid_t                 msg_lrpid;      /* last receive pid */
 172 };
 173
 174 struct l_semid_ds {
 175         struct l_ipc_perm       sem_perm;
 176         l_time_t                sem_otime;
 177         l_time_t                sem_ctime;
 178         l_uintptr_t             sem_base;
 179         l_uintptr_t             sem_pending;
 180         l_uintptr_t             sem_pending_last;
 181         l_uintptr_t             undo;
 182         l_ushort                sem_nsems;
 183 };
 184
 185 struct l_shmid_ds {
 186         struct l_ipc_perm       shm_perm;
 187         l_int                   shm_segsz;
 188         l_time_t                shm_atime;
 189         l_time_t                shm_dtime;
 190         l_time_t                shm_ctime;
 191         l_ushort                shm_cpid;
 192         l_ushort                shm_lpid;
 193         l_short                 shm_nattch;
 194         l_ushort                private1;
 195         l_uintptr_t             private2;
 196         l_uintptr_t             private3;
 197 };
 198
 199 static void
 200 linux_to_bsd_semid_ds(struct l_semid64_ds *lsp, struct semid_ds *bsp)
 201 {
 202
 203         linux_to_bsd_ipc_perm(&lsp->sem_perm, &bsp->sem_perm);
 204         bsp->sem_otime = lsp->sem_otime;
 205         bsp->sem_ctime = lsp->sem_ctime;
 206         bsp->sem_nsems = lsp->sem_nsems;
 207 }
 208
 209 static void
 210 bsd_to_linux_semid_ds(struct semid_ds *bsp, struct l_semid64_ds *lsp)
 211 {
 212
 213         bsd_to_linux_ipc_perm(&bsp->sem_perm, &lsp->sem_perm);
 214         lsp->sem_otime = bsp->sem_otime;
 215         lsp->sem_ctime = bsp->sem_ctime;
 216         lsp->sem_nsems = bsp->sem_nsems;
 217 }
 218
 219 static void
 220 linux_to_bsd_shmid_ds(struct l_shmid64_ds *lsp, struct shmid_ds *bsp)
 221 {
 222
 223         linux_to_bsd_ipc_perm(&lsp->shm_perm, &bsp->shm_perm);
 224         bsp->shm_segsz = lsp->shm_segsz;
 225         bsp->shm_lpid = lsp->shm_lpid;
 226         bsp->shm_cpid = lsp->shm_cpid;
 227         bsp->shm_nattch = lsp->shm_nattch;
 228         bsp->shm_atime = lsp->shm_atime;
 229         bsp->shm_dtime = lsp->shm_dtime;
 230         bsp->shm_ctime = lsp->shm_ctime;
 231 }
 232
 233 static void
 234 bsd_to_linux_shmid_ds(struct shmid_ds *bsp, struct l_shmid64_ds *lsp)
 235 {
 236
 237         bsd_to_linux_ipc_perm(&bsp->shm_perm, &lsp->shm_perm);
 238         lsp->shm_segsz = bsp->shm_segsz;
 239         lsp->shm_lpid = bsp->shm_lpid;
 240         lsp->shm_cpid = bsp->shm_cpid;
 241         lsp->shm_nattch = bsp->shm_nattch;
 242         lsp->shm_atime = bsp->shm_atime;
 243         lsp->shm_dtime = bsp->shm_dtime;
 244         lsp->shm_ctime = bsp->shm_ctime;
 245 }
 246
 247 static void
 248 linux_to_bsd_msqid_ds(struct l_msqid64_ds *lsp, struct msqid_ds *bsp)
 249 {
 250
 251         linux_to_bsd_ipc_perm(&lsp->msg_perm, &bsp->msg_perm);
 252         bsp->msg_cbytes = lsp->msg_cbytes;
 253         bsp->msg_qnum = lsp->msg_qnum;
 254         bsp->msg_qbytes = lsp->msg_qbytes;
 255         bsp->msg_lspid = lsp->msg_lspid;
 256         bsp->msg_lrpid = lsp->msg_lrpid;
 257         bsp->msg_stime = lsp->msg_stime;
 258         bsp->msg_rtime = lsp->msg_rtime;
 259         bsp->msg_ctime = lsp->msg_ctime;
 260 }
 261
 262 static void
 263 bsd_to_linux_msqid_ds(struct msqid_ds *bsp, struct l_msqid64_ds *lsp)
 264 {
 265
 266         bsd_to_linux_ipc_perm(&bsp->msg_perm, &lsp->msg_perm);
 267         lsp->msg_cbytes = bsp->msg_cbytes;
 268         lsp->msg_qnum = bsp->msg_qnum;
 269         lsp->msg_qbytes = bsp->msg_qbytes;
 270         lsp->msg_lspid = bsp->msg_lspid;
 271         lsp->msg_lrpid = bsp->msg_lrpid;
 272         lsp->msg_stime = bsp->msg_stime;
 273         lsp->msg_rtime = bsp->msg_rtime;
 274         lsp->msg_ctime = bsp->msg_ctime;
 275 }
 276
 277 static int
 278 linux_ipc64_perm_to_ipc_perm(struct l_ipc64_perm *in, struct l_ipc_perm *out)
 279 {
 280
 281         out->key = in->key;
 282         out->uid = in->uid;
 283         out->gid = in->gid;
 284         out->cuid = in->cuid;
 285         out->cgid = in->cgid;
 286         out->mode = in->mode;
 287         out->seq = in->seq;
 288
 289         /* Linux does not check overflow */
 290         if (out->uid != in->uid || out->gid != in->gid ||
 291             out->cuid != in->cuid || out->cgid != in->cgid ||
 292             out->mode != in->mode)
 293                 return (EOVERFLOW);
 294         else
 295                 return (0);
 296 }
 297
 298 static int
 299 linux_msqid_pullup(l_int ver, struct l_msqid64_ds *linux_msqid64, caddr_t uaddr)
 300 {
 301         struct l_msqid_ds linux_msqid;
 302         int error;
 303
 304         if (ver == LINUX_IPC_64 || SV_CURPROC_FLAG(SV_LP64))
 305                 return (copyin(uaddr, linux_msqid64, sizeof(*linux_msqid64)));
 306
 307         error = copyin(uaddr, &linux_msqid, sizeof(linux_msqid));
 308         if (error != 0)
 309                 return (error);
 310
 311         bzero(linux_msqid64, sizeof(*linux_msqid64));
 312         linux_msqid64->msg_perm.uid = linux_msqid.msg_perm.uid;
 313         linux_msqid64->msg_perm.gid = linux_msqid.msg_perm.gid;
 314         linux_msqid64->msg_perm.mode = linux_msqid.msg_perm.mode;
 315         if (linux_msqid.msg_qbytes == 0)
 316                 linux_msqid64->msg_qbytes = linux_msqid.msg_lqbytes;
 317         else
 318                 linux_msqid64->msg_qbytes = linux_msqid.msg_qbytes;
 319         return (0);
 320 }
 321
 322 static int
 323 linux_msqid_pushdown(l_int ver, struct l_msqid64_ds *linux_msqid64, caddr_t uaddr)
 324 {
 325         struct l_msqid_ds linux_msqid;
 326         int error;
 327
 328         if (ver == LINUX_IPC_64 || SV_CURPROC_FLAG(SV_LP64))
 329                 return (copyout(linux_msqid64, uaddr, sizeof(*linux_msqid64)));
 330
 331         bzero(&linux_msqid, sizeof(linux_msqid));
 332         error = linux_ipc64_perm_to_ipc_perm(&linux_msqid64->msg_perm,
 333             &linux_msqid.msg_perm);
 334         if (error != 0)
 335                 return (error);
 336
 337         linux_msqid.msg_stime = linux_msqid64->msg_stime;
 338         linux_msqid.msg_rtime = linux_msqid64->msg_rtime;
 339         linux_msqid.msg_ctime = linux_msqid64->msg_ctime;
 340
 341         if (linux_msqid64->msg_cbytes > USHRT_MAX)
 342                 linux_msqid.msg_cbytes = USHRT_MAX;
 343         else
 344                 linux_msqid.msg_cbytes = linux_msqid64->msg_cbytes;
 345         linux_msqid.msg_lcbytes = linux_msqid64->msg_cbytes;
 346         if (linux_msqid64->msg_qnum > USHRT_MAX)
 347                 linux_msqid.msg_qnum = USHRT_MAX;
 348         else
 349                 linux_msqid.msg_qnum = linux_msqid64->msg_qnum;
 350         if (linux_msqid64->msg_qbytes > USHRT_MAX)
 351                 linux_msqid.msg_qbytes = USHRT_MAX;
 352         else
 353                 linux_msqid.msg_qbytes = linux_msqid64->msg_qbytes;
 354         linux_msqid.msg_lqbytes = linux_msqid64->msg_qbytes;
 355         linux_msqid.msg_lspid = linux_msqid64->msg_lspid;
 356         linux_msqid.msg_lrpid = linux_msqid64->msg_lrpid;
 357
 358         /* Linux does not check overflow */
 359         if (linux_msqid.msg_stime != linux_msqid64->msg_stime ||
 360             linux_msqid.msg_rtime != linux_msqid64->msg_rtime ||
 361             linux_msqid.msg_ctime != linux_msqid64->msg_ctime)
 362                 return (EOVERFLOW);
 363         return (copyout(&linux_msqid, uaddr, sizeof(linux_msqid)));
 364 }
 365
 366 static int
 367 linux_semid_pullup(l_int ver, struct l_semid64_ds *linux_semid64, caddr_t uaddr)
 368 {
 369         struct l_semid_ds linux_semid;
 370         int error;
 371
 372         if (ver == LINUX_IPC_64 || SV_CURPROC_FLAG(SV_LP64))
 373                 return (copyin(uaddr, linux_semid64, sizeof(*linux_semid64)));
 374         error = copyin(uaddr, &linux_semid, sizeof(linux_semid));
 375         if (error != 0)
 376                 return (error);
 377
 378         bzero(linux_semid64, sizeof(*linux_semid64));
 379         linux_semid64->sem_perm.uid = linux_semid.sem_perm.uid;
 380         linux_semid64->sem_perm.gid = linux_semid.sem_perm.gid;
 381         linux_semid64->sem_perm.mode = linux_semid.sem_perm.mode;
 382         return (0);
 383 }
 384
 385 static int
 386 linux_semid_pushdown(l_int ver, struct l_semid64_ds *linux_semid64, caddr_t uaddr)
 387 {
 388         struct l_semid_ds linux_semid;
 389         int error;
 390
 391         if (ver == LINUX_IPC_64 || SV_CURPROC_FLAG(SV_LP64))
 392                 return (copyout(linux_semid64, uaddr, sizeof(*linux_semid64)));
 393
 394         bzero(&linux_semid, sizeof(linux_semid));
 395                 error = linux_ipc64_perm_to_ipc_perm(&linux_semid64->sem_perm,
 396             &linux_semid.sem_perm);
 397         if (error != 0)
 398                 return (error);
 399
 400         linux_semid.sem_otime = linux_semid64->sem_otime;
 401         linux_semid.sem_ctime = linux_semid64->sem_ctime;
 402         linux_semid.sem_nsems = linux_semid64->sem_nsems;
 403
 404         /* Linux does not check overflow */
 405         if (linux_semid.sem_otime != linux_semid64->sem_otime ||
 406             linux_semid.sem_ctime != linux_semid64->sem_ctime ||
 407             linux_semid.sem_nsems != linux_semid64->sem_nsems)
 408                 return (EOVERFLOW);
 409         return (copyout(&linux_semid, uaddr, sizeof(linux_semid)));
 410 }
 411
 412 static int
 413 linux_shmid_pullup(l_int ver, struct l_shmid64_ds *linux_shmid64, caddr_t uaddr)
 414 {
 415         struct l_shmid_ds linux_shmid;
 416         int error;
 417
 418         if (ver == LINUX_IPC_64 || SV_CURPROC_FLAG(SV_LP64))
 419                 return (copyin(uaddr, linux_shmid64, sizeof(*linux_shmid64)));
 420
 421         error = copyin(uaddr, &linux_shmid, sizeof(linux_shmid));
 422         if (error != 0)
 423                 return (error);
 424
 425         bzero(linux_shmid64, sizeof(*linux_shmid64));
 426         linux_shmid64->shm_perm.uid = linux_shmid.shm_perm.uid;
 427         linux_shmid64->shm_perm.gid = linux_shmid.shm_perm.gid;
 428         linux_shmid64->shm_perm.mode = linux_shmid.shm_perm.mode;
 429         return (0);
 430 }
 431
 432 static int
 433 linux_shmid_pushdown(l_int ver, struct l_shmid64_ds *linux_shmid64, caddr_t uaddr)
 434 {
 435         struct l_shmid_ds linux_shmid;
 436         int error;
 437
 438         if (ver == LINUX_IPC_64 || SV_CURPROC_FLAG(SV_LP64))
 439                 return (copyout(linux_shmid64, uaddr, sizeof(*linux_shmid64)));
 440
 441         bzero(&linux_shmid, sizeof(linux_shmid));
 442         error = linux_ipc64_perm_to_ipc_perm(&linux_shmid64->shm_perm,
 443             &linux_shmid.shm_perm);
 444         if (error != 0)
 445                 return (error);
 446
 447         linux_shmid.shm_segsz = linux_shmid64->shm_segsz;
 448         linux_shmid.shm_atime = linux_shmid64->shm_atime;
 449         linux_shmid.shm_dtime = linux_shmid64->shm_dtime;
 450         linux_shmid.shm_ctime = linux_shmid64->shm_ctime;
 451         linux_shmid.shm_cpid = linux_shmid64->shm_cpid;
 452         linux_shmid.shm_lpid = linux_shmid64->shm_lpid;
 453         linux_shmid.shm_nattch = linux_shmid64->shm_nattch;
 454
 455         /* Linux does not check overflow */
 456         if (linux_shmid.shm_segsz != linux_shmid64->shm_segsz ||
 457             linux_shmid.shm_atime != linux_shmid64->shm_atime ||
 458             linux_shmid.shm_dtime != linux_shmid64->shm_dtime ||
 459             linux_shmid.shm_ctime != linux_shmid64->shm_ctime ||
 460             linux_shmid.shm_cpid != linux_shmid64->shm_cpid ||
 461             linux_shmid.shm_lpid != linux_shmid64->shm_lpid ||
 462             linux_shmid.shm_nattch != linux_shmid64->shm_nattch)
 463                 return (EOVERFLOW);
 464         return (copyout(&linux_shmid, uaddr, sizeof(linux_shmid)));
 465 }
 466
 467 static int
 468 linux_shminfo_pushdown(l_int ver, struct l_shminfo64 *linux_shminfo64,
 469     caddr_t uaddr)
 470 {
 471         struct l_shminfo linux_shminfo;
 472
 473         if (ver == LINUX_IPC_64 || SV_CURPROC_FLAG(SV_LP64))
 474                 return (copyout(linux_shminfo64, uaddr,
 475                     sizeof(*linux_shminfo64)));
 476
 477         bzero(&linux_shminfo, sizeof(linux_shminfo));
 478         linux_shminfo.shmmax = linux_shminfo64->shmmax;
 479         linux_shminfo.shmmin = linux_shminfo64->shmmin;
 480         linux_shminfo.shmmni = linux_shminfo64->shmmni;
 481         linux_shminfo.shmseg = linux_shminfo64->shmseg;
 482         linux_shminfo.shmall = linux_shminfo64->shmall;
 483         return (copyout(&linux_shminfo, uaddr, sizeof(linux_shminfo)));
 484 }
 485
 486 #if defined(__i386__) || (defined(__amd64__) && defined(COMPAT_LINUX32))
 487 int
 488 linux_semtimedop_time64(struct thread *td, struct linux_semtimedop_time64_args *args)
 489 {
 490         struct timespec ts, *tsa;
 491         int error;
 492
 493         if (args->timeout) {
 494                 error = linux_get_timespec64(&ts, args->timeout);
 495                 if (error != 0)
 496                         return (error);
 497                 tsa = &ts;
 498         } else
 499                 tsa = NULL;
 500
 501         return (kern_semop(td, args->semid, PTRIN(args->tsops),
 502             args->nsops, tsa));
 503 }
 504 #endif /* __i386__) || (__amd64__ && COMPAT_LINUX32) */
 505
 506 int
 507 linux_semtimedop(struct thread *td, struct linux_semtimedop_args *args)
 508 {
 509         struct timespec ts, *tsa;
 510         int error;
 511
 512         if (args->timeout) {
 513                 error = linux_get_timespec(&ts, args->timeout);
 514                 if (error != 0)
 515                         return (error);
 516                 tsa = &ts;
 517         } else
 518                 tsa = NULL;
 519
 520         return (kern_semop(td, args->semid, PTRIN(args->tsops),
 521             args->nsops, tsa));
 522 }
 523
 524 int
 525 linux_semget(struct thread *td, struct linux_semget_args *args)
 526 {
 527         struct semget_args bsd_args = {
 528                 .key = args->key,
 529                 .nsems = args->nsems,
 530                 .semflg = args->semflg
 531         };
 532
 533         if (args->nsems < 0)
 534                 return (EINVAL);
 535         return (sys_semget(td, &bsd_args));
 536 }
 537
 538 int
 539 linux_semctl(struct thread *td, struct linux_semctl_args *args)
 540 {
 541         struct l_semid64_ds linux_semid64;
 542         struct l_seminfo linux_seminfo;
 543         struct semid_ds semid;
 544         union semun semun;
 545         register_t rval;
 546         int cmd, error;
 547
 548         memset(&linux_seminfo, 0, sizeof(linux_seminfo));
 549         memset(&linux_semid64, 0, sizeof(linux_semid64));
 550
 551         switch (args->cmd & ~LINUX_IPC_64) {
 552         case LINUX_IPC_RMID:
 553                 cmd = IPC_RMID;
 554                 break;
 555         case LINUX_GETNCNT:
 556                 cmd = GETNCNT;
 557                 break;
 558         case LINUX_GETPID:
 559                 cmd = GETPID;
 560                 break;
 561         case LINUX_GETVAL:
 562                 cmd = GETVAL;
 563                 break;
 564         case LINUX_GETZCNT:
 565                 cmd = GETZCNT;
 566                 break;
 567         case LINUX_SETVAL:
 568                 cmd = SETVAL;
 569                 semun.val = args->arg.val;
 570                 break;
 571         case LINUX_IPC_SET:
 572                 cmd = IPC_SET;
 573                 error = linux_semid_pullup(args->cmd & LINUX_IPC_64,
 574                     &linux_semid64, PTRIN(args->arg.buf));
 575                 if (error != 0)
 576                         return (error);
 577                 linux_to_bsd_semid_ds(&linux_semid64, &semid);
 578                 semun.buf = &semid;
 579                 return (kern_semctl(td, args->semid, args->semnum, cmd, &semun,
 580                     td->td_retval));
 581         case LINUX_IPC_STAT:
 582                 cmd = IPC_STAT;
 583                 semun.buf = &semid;
 584                 error = kern_semctl(td, args->semid, args->semnum, cmd, &semun,
 585                     &rval);
 586                 if (error != 0)
 587                         return (error);
 588                 bsd_to_linux_semid_ds(&semid, &linux_semid64);
 589                 return (linux_semid_pushdown(args->cmd & LINUX_IPC_64,
 590                     &linux_semid64, PTRIN(args->arg.buf)));
 591         case LINUX_SEM_STAT:
 592                 cmd = SEM_STAT;
 593                 semun.buf = &semid;
 594                 error = kern_semctl(td, args->semid, args->semnum, cmd, &semun,
 595                     &rval);
 596                 if (error != 0)
 597                         return (error);
 598                 bsd_to_linux_semid_ds(&semid, &linux_semid64);
 599                 error = linux_semid_pushdown(args->cmd & LINUX_IPC_64,
 600                     &linux_semid64, PTRIN(args->arg.buf));
 601                 if (error == 0)
 602                         td->td_retval[0] = rval;
 603                 return (error);
 604         case LINUX_IPC_INFO:
 605         case LINUX_SEM_INFO:
 606                 bcopy(&seminfo, &linux_seminfo.semmni, sizeof(linux_seminfo) -
 607                     sizeof(linux_seminfo.semmap) );
 608                 /*
 609                  * Linux does not use the semmap field but populates it with
 610                  * the defined value from SEMMAP, which really is redefined to
 611                  * SEMMNS, which they define as SEMMNI * SEMMSL.  Try to
 612                  * simulate this returning our dynamic semmns value.
 613                  */
 614                 linux_seminfo.semmap = linux_seminfo.semmns;
 615 /* XXX BSD equivalent?
 616 #define used_semids 10
 617 #define used_sems 10
 618                 linux_seminfo.semusz = used_semids;
 619                 linux_seminfo.semaem = used_sems;
 620 */
 621                 error = copyout(&linux_seminfo,
 622                     PTRIN(args->arg.buf), sizeof(linux_seminfo));
 623                 if (error != 0)
 624                         return (error);
 625                 /*
 626                  * TODO: Linux return the last assigned id, not the semmni.
 627                  */
 628                 td->td_retval[0] = seminfo.semmni;
 629                 return (0);
 630         case LINUX_GETALL:
 631                 cmd = GETALL;
 632                 semun.array = PTRIN(args->arg.array);
 633                 break;
 634         case LINUX_SETALL:
 635                 cmd = SETALL;
 636                 semun.array = PTRIN(args->arg.array);
 637                 break;
 638         default:
 639                 linux_msg(td, "ipc type %d is not implemented",
 640                   args->cmd & ~LINUX_IPC_64);
 641                 return (EINVAL);
 642         }
 643         return (kern_semctl(td, args->semid, args->semnum, cmd, &semun,
 644             td->td_retval));
 645 }
 646
 647 int
 648 linux_msgsnd(struct thread *td, struct linux_msgsnd_args *args)
 649 {
 650         const void *msgp;
 651         long mtype;
 652         l_long lmtype;
 653         int error;
 654
 655         if ((l_long)args->msgsz < 0 || args->msgsz > (l_long)msginfo.msgmax)
 656                 return (EINVAL);
 657         msgp = PTRIN(args->msgp);
 658         if ((error = copyin(msgp, &lmtype, sizeof(lmtype))) != 0)
 659                 return (error);
 660         mtype = (long)lmtype;
 661         return (kern_msgsnd(td, args->msqid,
 662             (const char *)msgp + sizeof(lmtype),
 663             args->msgsz, args->msgflg, mtype));
 664 }
 665
 666 int
 667 linux_msgrcv(struct thread *td, struct linux_msgrcv_args *args)
 668 {
 669         void *msgp;
 670         long mtype;
 671         l_long lmtype;
 672         int error;
 673
 674         if ((l_long)args->msgsz < 0 || args->msgsz > (l_long)msginfo.msgmax)
 675                 return (EINVAL);
 676         msgp = PTRIN(args->msgp);
 677         if ((error = kern_msgrcv(td, args->msqid,
 678             (char *)msgp + sizeof(lmtype), args->msgsz,
 679             args->msgtyp, args->msgflg, &mtype)) != 0)
 680                 return (error);
 681         lmtype = (l_long)mtype;
 682         return (copyout(&lmtype, msgp, sizeof(lmtype)));
 683 }
 684
 685 int
 686 linux_msgget(struct thread *td, struct linux_msgget_args *args)
 687 {
 688         struct msgget_args bsd_args = {
 689                 .key = args->key,
 690                 .msgflg = args->msgflg
 691         };
 692
 693         return (sys_msgget(td, &bsd_args));
 694 }
 695
 696 int
 697 linux_msgctl(struct thread *td, struct linux_msgctl_args *args)
 698 {
 699         int error, bsd_cmd;
 700         struct l_msqid64_ds linux_msqid64;
 701         struct msqid_ds bsd_msqid;
 702
 703         memset(&linux_msqid64, 0, sizeof(linux_msqid64));
 704
 705         bsd_cmd = args->cmd & ~LINUX_IPC_64;
 706         switch (bsd_cmd) {
 707         case LINUX_IPC_INFO:
 708         case LINUX_MSG_INFO: {
 709                 struct l_msginfo linux_msginfo;
 710
 711                 memset(&linux_msginfo, 0, sizeof(linux_msginfo));
 712                 /*
 713                  * XXX MSG_INFO uses the same data structure but returns different
 714                  * dynamic counters in msgpool, msgmap, and msgtql fields.
 715                  */
 716                 linux_msginfo.msgpool = (long)msginfo.msgmni *
 717                     (long)msginfo.msgmnb / 1024L;       /* XXX MSG_INFO. */
 718                 linux_msginfo.msgmap = msginfo.msgmnb;  /* XXX MSG_INFO. */
 719                 linux_msginfo.msgmax = msginfo.msgmax;
 720                 linux_msginfo.msgmnb = msginfo.msgmnb;
 721                 linux_msginfo.msgmni = msginfo.msgmni;
 722                 linux_msginfo.msgssz = msginfo.msgssz;
 723                 linux_msginfo.msgtql = msginfo.msgtql;  /* XXX MSG_INFO. */
 724                 linux_msginfo.msgseg = msginfo.msgseg;
 725                 error = copyout(&linux_msginfo, PTRIN(args->buf),
 726                     sizeof(linux_msginfo));
 727                 if (error == 0)
 728                     td->td_retval[0] = msginfo.msgmni;  /* XXX */
 729
 730                 return (error);
 731         }
 732
 733         /*
 734          * TODO: implement this
 735          * case LINUX_MSG_STAT:
 736          */
 737         case LINUX_IPC_STAT:
 738                 /* NOTHING */
 739                 break;
 740
 741         case LINUX_IPC_SET:
 742                 error = linux_msqid_pullup(args->cmd & LINUX_IPC_64,
 743                     &linux_msqid64, PTRIN(args->buf));
 744                 if (error != 0)
 745                         return (error);
 746                 linux_to_bsd_msqid_ds(&linux_msqid64, &bsd_msqid);
 747                 break;
 748
 749         case LINUX_IPC_RMID:
 750                 /* NOTHING */
 751                 break;
 752
 753         default:
 754                 return (EINVAL);
 755                 break;
 756         }
 757
 758         error = kern_msgctl(td, args->msqid, bsd_cmd, &bsd_msqid);
 759         if (error != 0) {
 760                 if (bsd_cmd == LINUX_IPC_RMID && error == EACCES)
 761                         return (EPERM);
 762                 if (bsd_cmd != LINUX_IPC_RMID || error != EINVAL)
 763                         return (error);
 764         }
 765
 766         if (bsd_cmd == LINUX_IPC_STAT) {
 767                 bsd_to_linux_msqid_ds(&bsd_msqid, &linux_msqid64);
 768                 return (linux_msqid_pushdown(args->cmd & LINUX_IPC_64,
 769                     &linux_msqid64, PTRIN(args->buf)));
 770         }
 771
 772         return (0);
 773 }
 774
 775 int
 776 linux_shmat(struct thread *td, struct linux_shmat_args *args)
 777 {
 778         struct shmat_args bsd_args = {
 779                 .shmid = args->shmid,
 780                 .shmaddr = PTRIN(args->shmaddr),
 781                 .shmflg = args->shmflg
 782         };
 783
 784         return (sys_shmat(td, &bsd_args));
 785 }
 786
 787 int
 788 linux_shmdt(struct thread *td, struct linux_shmdt_args *args)
 789 {
 790         struct shmdt_args bsd_args = {
 791                 .shmaddr = PTRIN(args->shmaddr)
 792         };
 793
 794         return (sys_shmdt(td, &bsd_args));
 795 }
 796
 797 int
 798 linux_shmget(struct thread *td, struct linux_shmget_args *args)
 799 {
 800         struct shmget_args bsd_args = {
 801                 .key = args->key,
 802                 .size = args->size,
 803                 .shmflg = args->shmflg
 804         };
 805
 806         return (sys_shmget(td, &bsd_args));
 807 }
 808
 809 int
 810 linux_shmctl(struct thread *td, struct linux_shmctl_args *args)
 811 {
 812         struct l_shmid64_ds linux_shmid64;
 813         struct l_shminfo64 linux_shminfo64;
 814         struct l_shm_info linux_shm_info;
 815         struct shmid_ds bsd_shmid;
 816         int error;
 817
 818         memset(&linux_shm_info, 0, sizeof(linux_shm_info));
 819         memset(&linux_shmid64, 0, sizeof(linux_shmid64));
 820         memset(&linux_shminfo64, 0, sizeof(linux_shminfo64));
 821
 822         switch (args->cmd & ~LINUX_IPC_64) {
 823         case LINUX_IPC_INFO: {
 824                 struct shminfo bsd_shminfo;
 825
 826                 /* Perform shmctl wanting removed segments lookup */
 827                 error = kern_shmctl(td, args->shmid, IPC_INFO,
 828                     (void *)&bsd_shminfo, NULL);
 829                 if (error != 0)
 830                         return (error);
 831
 832                 bsd_to_linux_shminfo(&bsd_shminfo, &linux_shminfo64);
 833
 834                 return (linux_shminfo_pushdown(args->cmd & LINUX_IPC_64,
 835                     &linux_shminfo64, PTRIN(args->buf)));
 836         }
 837
 838         case LINUX_SHM_INFO: {
 839                 struct shm_info bsd_shm_info;
 840
 841                 /* Perform shmctl wanting removed segments lookup */
 842                 error = kern_shmctl(td, args->shmid, SHM_INFO,
 843                     (void *)&bsd_shm_info, NULL);
 844                 if (error != 0)
 845                         return (error);
 846
 847                 bsd_to_linux_shm_info(&bsd_shm_info, &linux_shm_info);
 848
 849                 return (copyout(&linux_shm_info, PTRIN(args->buf),
 850                     sizeof(struct l_shm_info)));
 851         }
 852
 853         case LINUX_IPC_STAT:
 854                 /* Perform shmctl wanting removed segments lookup */
 855                 error = kern_shmctl(td, args->shmid, IPC_STAT,
 856                     (void *)&bsd_shmid, NULL);
 857                 if (error != 0)
 858                         return (error);
 859
 860                 bsd_to_linux_shmid_ds(&bsd_shmid, &linux_shmid64);
 861
 862                 return (linux_shmid_pushdown(args->cmd & LINUX_IPC_64,
 863                     &linux_shmid64, PTRIN(args->buf)));
 864
 865         case LINUX_SHM_STAT:
 866                 /* Perform shmctl wanting removed segments lookup */
 867                 error = kern_shmctl(td, args->shmid, IPC_STAT,
 868                     (void *)&bsd_shmid, NULL);
 869                 if (error != 0)
 870                         return (error);
 871
 872                 bsd_to_linux_shmid_ds(&bsd_shmid, &linux_shmid64);
 873
 874                 return (linux_shmid_pushdown(args->cmd & LINUX_IPC_64,
 875                     &linux_shmid64, PTRIN(args->buf)));
 876
 877         case LINUX_IPC_SET:
 878                 error = linux_shmid_pullup(args->cmd & LINUX_IPC_64,
 879                     &linux_shmid64, PTRIN(args->buf));
 880                 if (error != 0)
 881                         return (error);
 882
 883                 linux_to_bsd_shmid_ds(&linux_shmid64, &bsd_shmid);
 884
 885                 /* Perform shmctl wanting removed segments lookup */
 886                 return (kern_shmctl(td, args->shmid, IPC_SET,
 887                     (void *)&bsd_shmid, NULL));
 888
 889         case LINUX_IPC_RMID: {
 890                 void *buf;
 891
 892                 if (args->buf == 0)
 893                         buf = NULL;
 894                 else {
 895                         error = linux_shmid_pullup(args->cmd & LINUX_IPC_64,
 896                             &linux_shmid64, PTRIN(args->buf));
 897                         if (error != 0)
 898                                 return (error);
 899                         linux_to_bsd_shmid_ds(&linux_shmid64, &bsd_shmid);
 900                         buf = (void *)&bsd_shmid;
 901                 }
 902                 return (kern_shmctl(td, args->shmid, IPC_RMID, buf, NULL));
 903         }
 904
 905         case LINUX_SHM_LOCK:
 906                 /* FALLTHROUGH */
 907         case LINUX_SHM_UNLOCK:
 908                 /* FALLTHROUGH */
 909         default:
 910                 linux_msg(td, "ipc type %d not implemented",
 911                     args->cmd & ~LINUX_IPC_64);
 912                 return (EINVAL);
 913         }
 914 }
 915
 916 MODULE_DEPEND(linux, sysvmsg, 1, 1, 1);
 917 MODULE_DEPEND(linux, sysvsem, 1, 1, 1);
 918 MODULE_DEPEND(linux, sysvshm, 1, 1, 1);