sys/compat/linux/linux_ipc.c

   1 /*-
   2  * Copyright (c) 1994-1995 Søren Schmidt
   3  * All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions
   7  * are met:
   8  * 1. Redistributions of source code must retain the above copyright
   9  *    notice, this list of conditions and the following disclaimer
  10  *    in this position and unchanged.
  11  * 2. Redistributions in binary form must reproduce the above copyright
  12  *    notice, this list of conditions and the following disclaimer in the
  13  *    documentation and/or other materials provided with the distribution.
  14  * 3. The name of the author may not be used to endorse or promote products
  15  *    derived from this software without specific prior written permission
  16  *
  17  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
  18  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  19  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  20  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
  21  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  22  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  23  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  24  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  25  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  26  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  27  */
  28
  29 #include <sys/cdefs.h>
  30 __FBSDID("$FreeBSD$");
  31
  32 #include <sys/param.h>
  33 #include <sys/systm.h>
  34 #include <sys/syscallsubr.h>
  35 #include <sys/sysproto.h>
  36 #include <sys/proc.h>
  37 #include <sys/limits.h>
  38 #include <sys/msg.h>
  39 #include <sys/sem.h>
  40 #include <sys/shm.h>
  41
  42 #include "opt_compat.h"
  43
  44 #ifdef COMPAT_LINUX32
  45 #include <machine/../linux32/linux.h>
  46 #include <machine/../linux32/linux32_proto.h>
  47 #include <machine/../linux32/linux32_ipc64.h>
  48 #else
  49 #include <machine/../linux/linux.h>
  50 #include <machine/../linux/linux_proto.h>
  51 #include <machine/../linux/linux_ipc64.h>
  52 #endif
  53 #include <compat/linux/linux_ipc.h>
  54 #include <compat/linux/linux_util.h>
  55
  56 struct l_seminfo {
  57         l_int semmap;
  58         l_int semmni;
  59         l_int semmns;
  60         l_int semmnu;
  61         l_int semmsl;
  62         l_int semopm;
  63         l_int semume;
  64         l_int semusz;
  65         l_int semvmx;
  66         l_int semaem;
  67 };
  68
  69 struct l_shminfo {
  70         l_int shmmax;
  71         l_int shmmin;
  72         l_int shmmni;
  73         l_int shmseg;
  74         l_int shmall;
  75 };
  76
  77 struct l_shm_info {
  78         l_int used_ids;
  79         l_ulong shm_tot;  /* total allocated shm */
  80         l_ulong shm_rss;  /* total resident shm */
  81         l_ulong shm_swp;  /* total swapped shm */
  82         l_ulong swap_attempts;
  83         l_ulong swap_successes;
  84 };
  85
  86 struct l_msginfo {
  87         l_int msgpool;
  88         l_int msgmap;
  89         l_int msgmax;
  90         l_int msgmnb;
  91         l_int msgmni;
  92         l_int msgssz;
  93         l_int msgtql;
  94         l_ushort msgseg;
  95 };
  96
  97 static void
  98 bsd_to_linux_shminfo( struct shminfo *bpp, struct l_shminfo *lpp)
  99 {
 100
 101         lpp->shmmax = bpp->shmmax;
 102         lpp->shmmin = bpp->shmmin;
 103         lpp->shmmni = bpp->shmmni;
 104         lpp->shmseg = bpp->shmseg;
 105         lpp->shmall = bpp->shmall;
 106 }
 107
 108 static void
 109 bsd_to_linux_shm_info( struct shm_info *bpp, struct l_shm_info *lpp)
 110 {
 111
 112         lpp->used_ids = bpp->used_ids ;
 113         lpp->shm_tot = bpp->shm_tot ;
 114         lpp->shm_rss = bpp->shm_rss ;
 115         lpp->shm_swp = bpp->shm_swp ;
 116         lpp->swap_attempts = bpp->swap_attempts ;
 117         lpp->swap_successes = bpp->swap_successes ;
 118 }
 119
 120 static void
 121 linux_to_bsd_ipc_perm(struct l_ipc_perm *lpp, struct ipc_perm *bpp)
 122 {
 123
 124         bpp->key = lpp->key;
 125         bpp->uid = lpp->uid;
 126         bpp->gid = lpp->gid;
 127         bpp->cuid = lpp->cuid;
 128         bpp->cgid = lpp->cgid;
 129         bpp->mode = lpp->mode;
 130         bpp->seq = lpp->seq;
 131 }
 132
 133
 134 static void
 135 bsd_to_linux_ipc_perm(struct ipc_perm *bpp, struct l_ipc_perm *lpp)
 136 {
 137
 138         lpp->key = bpp->key;
 139         lpp->uid = bpp->uid;
 140         lpp->gid = bpp->gid;
 141         lpp->cuid = bpp->cuid;
 142         lpp->cgid = bpp->cgid;
 143         lpp->mode = bpp->mode;
 144         lpp->seq = bpp->seq;
 145 }
 146
 147 struct l_msqid_ds {
 148         struct l_ipc_perm       msg_perm;
 149         l_uintptr_t             msg_first;      /* first message on queue,unused */
 150         l_uintptr_t             msg_last;       /* last message in queue,unused */
 151         l_time_t                msg_stime;      /* last msgsnd time */
 152         l_time_t                msg_rtime;      /* last msgrcv time */
 153         l_time_t                msg_ctime;      /* last change time */
 154         l_ulong                 msg_lcbytes;    /* Reuse junk fields for 32 bit */
 155         l_ulong                 msg_lqbytes;    /* ditto */
 156         l_ushort                msg_cbytes;     /* current number of bytes on queue */
 157         l_ushort                msg_qnum;       /* number of messages in queue */
 158         l_ushort                msg_qbytes;     /* max number of bytes on queue */
 159         l_pid_t                 msg_lspid;      /* pid of last msgsnd */
 160         l_pid_t                 msg_lrpid;      /* last receive pid */
 161 }
 162 #if defined(__amd64__) && defined(COMPAT_LINUX32)
 163 __packed
 164 #endif
 165 ;
 166
 167 struct l_semid_ds {
 168         struct l_ipc_perm       sem_perm;
 169         l_time_t                sem_otime;
 170         l_time_t                sem_ctime;
 171         l_uintptr_t             sem_base;
 172         l_uintptr_t             sem_pending;
 173         l_uintptr_t             sem_pending_last;
 174         l_uintptr_t             undo;
 175         l_ushort                sem_nsems;
 176 }
 177 #if defined(__amd64__) && defined(COMPAT_LINUX32)
 178 __packed
 179 #endif
 180 ;
 181
 182 struct l_shmid_ds {
 183         struct l_ipc_perm       shm_perm;
 184         l_int                   shm_segsz;
 185         l_time_t                shm_atime;
 186         l_time_t                shm_dtime;
 187         l_time_t                shm_ctime;
 188         l_ushort                shm_cpid;
 189         l_ushort                shm_lpid;
 190         l_short                 shm_nattch;
 191         l_ushort                private1;
 192         l_uintptr_t             private2;
 193         l_uintptr_t             private3;
 194 };
 195
 196 static void
 197 linux_to_bsd_semid_ds(struct l_semid_ds *lsp, struct semid_ds *bsp)
 198 {
 199
 200         linux_to_bsd_ipc_perm(&lsp->sem_perm, &bsp->sem_perm);
 201         bsp->sem_otime = lsp->sem_otime;
 202         bsp->sem_ctime = lsp->sem_ctime;
 203         bsp->sem_nsems = lsp->sem_nsems;
 204         bsp->sem_base = PTRIN(lsp->sem_base);
 205 }
 206
 207 static void
 208 bsd_to_linux_semid_ds(struct semid_ds *bsp, struct l_semid_ds *lsp)
 209 {
 210
 211         bsd_to_linux_ipc_perm(&bsp->sem_perm, &lsp->sem_perm);
 212         lsp->sem_otime = bsp->sem_otime;
 213         lsp->sem_ctime = bsp->sem_ctime;
 214         lsp->sem_nsems = bsp->sem_nsems;
 215         lsp->sem_base = PTROUT(bsp->sem_base);
 216 }
 217
 218 static void
 219 linux_to_bsd_shmid_ds(struct l_shmid_ds *lsp, struct shmid_ds *bsp)
 220 {
 221
 222         linux_to_bsd_ipc_perm(&lsp->shm_perm, &bsp->shm_perm);
 223         bsp->shm_segsz = lsp->shm_segsz;
 224         bsp->shm_lpid = lsp->shm_lpid;
 225         bsp->shm_cpid = lsp->shm_cpid;
 226         bsp->shm_nattch = lsp->shm_nattch;
 227         bsp->shm_atime = lsp->shm_atime;
 228         bsp->shm_dtime = lsp->shm_dtime;
 229         bsp->shm_ctime = lsp->shm_ctime;
 230 }
 231
 232 static void
 233 bsd_to_linux_shmid_ds(struct shmid_ds *bsp, struct l_shmid_ds *lsp)
 234 {
 235
 236         bsd_to_linux_ipc_perm(&bsp->shm_perm, &lsp->shm_perm);
 237         if (bsp->shm_segsz > INT_MAX)
 238                 lsp->shm_segsz = INT_MAX;
 239         else
 240                 lsp->shm_segsz = bsp->shm_segsz;
 241         lsp->shm_lpid = bsp->shm_lpid;
 242         lsp->shm_cpid = bsp->shm_cpid;
 243         if (bsp->shm_nattch > SHRT_MAX)
 244                 lsp->shm_nattch = SHRT_MAX;
 245         else
 246                 lsp->shm_nattch = bsp->shm_nattch;
 247         lsp->shm_atime = bsp->shm_atime;
 248         lsp->shm_dtime = bsp->shm_dtime;
 249         lsp->shm_ctime = bsp->shm_ctime;
 250         lsp->private3 = 0;
 251 }
 252
 253 static void
 254 linux_to_bsd_msqid_ds(struct l_msqid_ds *lsp, struct msqid_ds *bsp)
 255 {
 256
 257         linux_to_bsd_ipc_perm(&lsp->msg_perm, &bsp->msg_perm);
 258         bsp->msg_cbytes = lsp->msg_cbytes;
 259         bsp->msg_qnum = lsp->msg_qnum;
 260         bsp->msg_qbytes = lsp->msg_qbytes;
 261         bsp->msg_lspid = lsp->msg_lspid;
 262         bsp->msg_lrpid = lsp->msg_lrpid;
 263         bsp->msg_stime = lsp->msg_stime;
 264         bsp->msg_rtime = lsp->msg_rtime;
 265         bsp->msg_ctime = lsp->msg_ctime;
 266 }
 267
 268 static void
 269 bsd_to_linux_msqid_ds(struct msqid_ds *bsp, struct l_msqid_ds *lsp)
 270 {
 271
 272         bsd_to_linux_ipc_perm(&bsp->msg_perm, &lsp->msg_perm);
 273         lsp->msg_cbytes = bsp->msg_cbytes;
 274         lsp->msg_qnum = bsp->msg_qnum;
 275         lsp->msg_qbytes = bsp->msg_qbytes;
 276         lsp->msg_lspid = bsp->msg_lspid;
 277         lsp->msg_lrpid = bsp->msg_lrpid;
 278         lsp->msg_stime = bsp->msg_stime;
 279         lsp->msg_rtime = bsp->msg_rtime;
 280         lsp->msg_ctime = bsp->msg_ctime;
 281 }
 282
 283 static void
 284 linux_ipc_perm_to_ipc64_perm(struct l_ipc_perm *in, struct l_ipc64_perm *out)
 285 {
 286
 287         /* XXX: do we really need to do something here? */
 288         out->key = in->key;
 289         out->uid = in->uid;
 290         out->gid = in->gid;
 291         out->cuid = in->cuid;
 292         out->cgid = in->cgid;
 293         out->mode = in->mode;
 294         out->seq = in->seq;
 295 }
 296
 297 static int
 298 linux_msqid_pullup(l_int ver, struct l_msqid_ds *linux_msqid, caddr_t uaddr)
 299 {
 300         struct l_msqid64_ds linux_msqid64;
 301         int error;
 302
 303         if (ver == LINUX_IPC_64) {
 304                 error = copyin(uaddr, &linux_msqid64, sizeof(linux_msqid64));
 305                 if (error != 0)
 306                         return (error);
 307
 308                 bzero(linux_msqid, sizeof(*linux_msqid));
 309
 310                 linux_msqid->msg_perm.uid = linux_msqid64.msg_perm.uid;
 311                 linux_msqid->msg_perm.gid = linux_msqid64.msg_perm.gid;
 312                 linux_msqid->msg_perm.mode = linux_msqid64.msg_perm.mode;
 313
 314                 if (linux_msqid64.msg_qbytes > USHRT_MAX)
 315                         linux_msqid->msg_lqbytes = linux_msqid64.msg_qbytes;
 316                 else
 317                         linux_msqid->msg_qbytes = linux_msqid64.msg_qbytes;
 318         } else
 319                 error = copyin(uaddr, linux_msqid, sizeof(*linux_msqid));
 320
 321         return (error);
 322 }
 323
 324 static int
 325 linux_msqid_pushdown(l_int ver, struct l_msqid_ds *linux_msqid, caddr_t uaddr)
 326 {
 327         struct l_msqid64_ds linux_msqid64;
 328
 329         if (ver == LINUX_IPC_64) {
 330                 bzero(&linux_msqid64, sizeof(linux_msqid64));
 331
 332                 linux_ipc_perm_to_ipc64_perm(&linux_msqid->msg_perm,
 333                     &linux_msqid64.msg_perm);
 334
 335                 linux_msqid64.msg_stime = linux_msqid->msg_stime;
 336                 linux_msqid64.msg_rtime = linux_msqid->msg_rtime;
 337                 linux_msqid64.msg_ctime = linux_msqid->msg_ctime;
 338
 339                 if (linux_msqid->msg_cbytes == 0)
 340                         linux_msqid64.msg_cbytes = linux_msqid->msg_lcbytes;
 341                 else
 342                         linux_msqid64.msg_cbytes = linux_msqid->msg_cbytes;
 343
 344                 linux_msqid64.msg_qnum = linux_msqid->msg_qnum;
 345
 346                 if (linux_msqid->msg_qbytes == 0)
 347                         linux_msqid64.msg_qbytes = linux_msqid->msg_lqbytes;
 348                 else
 349                         linux_msqid64.msg_qbytes = linux_msqid->msg_qbytes;
 350
 351                 linux_msqid64.msg_lspid = linux_msqid->msg_lspid;
 352                 linux_msqid64.msg_lrpid = linux_msqid->msg_lrpid;
 353
 354                 return (copyout(&linux_msqid64, uaddr, sizeof(linux_msqid64)));
 355         } else
 356                 return (copyout(linux_msqid, uaddr, sizeof(*linux_msqid)));
 357 }
 358
 359 static int
 360 linux_semid_pullup(l_int ver, struct l_semid_ds *linux_semid, caddr_t uaddr)
 361 {
 362         struct l_semid64_ds linux_semid64;
 363         int error;
 364
 365         if (ver == LINUX_IPC_64) {
 366                 error = copyin(uaddr, &linux_semid64, sizeof(linux_semid64));
 367                 if (error != 0)
 368                         return (error);
 369
 370                 bzero(linux_semid, sizeof(*linux_semid));
 371
 372                 linux_semid->sem_perm.uid = linux_semid64.sem_perm.uid;
 373                 linux_semid->sem_perm.gid = linux_semid64.sem_perm.gid;
 374                 linux_semid->sem_perm.mode = linux_semid64.sem_perm.mode;
 375         } else
 376                 error = copyin(uaddr, linux_semid, sizeof(*linux_semid));
 377
 378         return (error);
 379 }
 380
 381 static int
 382 linux_semid_pushdown(l_int ver, struct l_semid_ds *linux_semid, caddr_t uaddr)
 383 {
 384         struct l_semid64_ds linux_semid64;
 385
 386         if (ver == LINUX_IPC_64) {
 387                 bzero(&linux_semid64, sizeof(linux_semid64));
 388
 389                 linux_ipc_perm_to_ipc64_perm(&linux_semid->sem_perm,
 390                     &linux_semid64.sem_perm);
 391
 392                 linux_semid64.sem_otime = linux_semid->sem_otime;
 393                 linux_semid64.sem_ctime = linux_semid->sem_ctime;
 394                 linux_semid64.sem_nsems = linux_semid->sem_nsems;
 395
 396                 return (copyout(&linux_semid64, uaddr, sizeof(linux_semid64)));
 397         } else
 398                 return (copyout(linux_semid, uaddr, sizeof(*linux_semid)));
 399 }
 400
 401 static int
 402 linux_shmid_pullup(l_int ver, struct l_shmid_ds *linux_shmid, caddr_t uaddr)
 403 {
 404         struct l_shmid64_ds linux_shmid64;
 405         int error;
 406
 407         if (ver == LINUX_IPC_64) {
 408                 error = copyin(uaddr, &linux_shmid64, sizeof(linux_shmid64));
 409                 if (error != 0)
 410                         return (error);
 411
 412                 bzero(linux_shmid, sizeof(*linux_shmid));
 413
 414                 linux_shmid->shm_perm.uid = linux_shmid64.shm_perm.uid;
 415                 linux_shmid->shm_perm.gid = linux_shmid64.shm_perm.gid;
 416                 linux_shmid->shm_perm.mode = linux_shmid64.shm_perm.mode;
 417         } else
 418                 error = copyin(uaddr, linux_shmid, sizeof(*linux_shmid));
 419
 420         return (error);
 421 }
 422
 423 static int
 424 linux_shmid_pushdown(l_int ver, struct l_shmid_ds *linux_shmid, caddr_t uaddr)
 425 {
 426         struct l_shmid64_ds linux_shmid64;
 427
 428         /*
 429          * XXX: This is backwards and loses information in shm_nattch
 430          * and shm_segsz.  We should probably either expose the BSD
 431          * shmid structure directly and convert it to either the
 432          * non-64 or 64 variant directly or the code should always
 433          * convert to the 64 variant and then truncate values into the
 434          * non-64 variant if needed since the 64 variant has more
 435          * precision.
 436          */
 437         if (ver == LINUX_IPC_64) {
 438                 bzero(&linux_shmid64, sizeof(linux_shmid64));
 439
 440                 linux_ipc_perm_to_ipc64_perm(&linux_shmid->shm_perm,
 441                     &linux_shmid64.shm_perm);
 442
 443                 linux_shmid64.shm_segsz = linux_shmid->shm_segsz;
 444                 linux_shmid64.shm_atime = linux_shmid->shm_atime;
 445                 linux_shmid64.shm_dtime = linux_shmid->shm_dtime;
 446                 linux_shmid64.shm_ctime = linux_shmid->shm_ctime;
 447                 linux_shmid64.shm_cpid = linux_shmid->shm_cpid;
 448                 linux_shmid64.shm_lpid = linux_shmid->shm_lpid;
 449                 linux_shmid64.shm_nattch = linux_shmid->shm_nattch;
 450
 451                 return (copyout(&linux_shmid64, uaddr, sizeof(linux_shmid64)));
 452         } else
 453                 return (copyout(linux_shmid, uaddr, sizeof(*linux_shmid)));
 454 }
 455
 456 static int
 457 linux_shminfo_pushdown(l_int ver, struct l_shminfo *linux_shminfo,
 458     caddr_t uaddr)
 459 {
 460         struct l_shminfo64 linux_shminfo64;
 461
 462         if (ver == LINUX_IPC_64) {
 463                 bzero(&linux_shminfo64, sizeof(linux_shminfo64));
 464
 465                 linux_shminfo64.shmmax = linux_shminfo->shmmax;
 466                 linux_shminfo64.shmmin = linux_shminfo->shmmin;
 467                 linux_shminfo64.shmmni = linux_shminfo->shmmni;
 468                 linux_shminfo64.shmseg = linux_shminfo->shmseg;
 469                 linux_shminfo64.shmall = linux_shminfo->shmall;
 470
 471                 return (copyout(&linux_shminfo64, uaddr,
 472                     sizeof(linux_shminfo64)));
 473         } else
 474                 return (copyout(linux_shminfo, uaddr, sizeof(*linux_shminfo)));
 475 }
 476
 477 int
 478 linux_semop(struct thread *td, struct linux_semop_args *args)
 479 {
 480         struct semop_args /* {
 481         int     semid;
 482         struct  sembuf *sops;
 483         int             nsops;
 484         } */ bsd_args;
 485
 486         bsd_args.semid = args->semid;
 487         bsd_args.sops = PTRIN(args->tsops);
 488         bsd_args.nsops = args->nsops;
 489         return (sys_semop(td, &bsd_args));
 490 }
 491
 492 int
 493 linux_semget(struct thread *td, struct linux_semget_args *args)
 494 {
 495         struct semget_args /* {
 496         key_t   key;
 497         int             nsems;
 498         int             semflg;
 499         } */ bsd_args;
 500
 501         if (args->nsems < 0)
 502                 return (EINVAL);
 503         bsd_args.key = args->key;
 504         bsd_args.nsems = args->nsems;
 505         bsd_args.semflg = args->semflg;
 506         return (sys_semget(td, &bsd_args));
 507 }
 508
 509 int
 510 linux_semctl(struct thread *td, struct linux_semctl_args *args)
 511 {
 512         struct l_semid_ds linux_semid;
 513         struct l_seminfo linux_seminfo;
 514         struct semid_ds semid;
 515         union semun semun;
 516         register_t rval;
 517         int cmd, error;
 518
 519         switch (args->cmd & ~LINUX_IPC_64) {
 520         case LINUX_IPC_RMID:
 521                 cmd = IPC_RMID;
 522                 break;
 523         case LINUX_GETNCNT:
 524                 cmd = GETNCNT;
 525                 break;
 526         case LINUX_GETPID:
 527                 cmd = GETPID;
 528                 break;
 529         case LINUX_GETVAL:
 530                 cmd = GETVAL;
 531                 break;
 532         case LINUX_GETZCNT:
 533                 cmd = GETZCNT;
 534                 break;
 535         case LINUX_SETVAL:
 536                 cmd = SETVAL;
 537                 semun.val = args->arg.val;
 538                 break;
 539         case LINUX_IPC_SET:
 540                 cmd = IPC_SET;
 541                 error = linux_semid_pullup(args->cmd & LINUX_IPC_64,
 542                     &linux_semid, PTRIN(args->arg.buf));
 543                 if (error)
 544                         return (error);
 545                 linux_to_bsd_semid_ds(&linux_semid, &semid);
 546                 semun.buf = &semid;
 547                 return (kern_semctl(td, args->semid, args->semnum, cmd, &semun,
 548                     td->td_retval));
 549         case LINUX_IPC_STAT:
 550         case LINUX_SEM_STAT:
 551                 if ((args->cmd & ~LINUX_IPC_64) == LINUX_IPC_STAT)
 552                         cmd = IPC_STAT;
 553                 else
 554                         cmd = SEM_STAT;
 555                 semun.buf = &semid;
 556                 error = kern_semctl(td, args->semid, args->semnum, cmd, &semun,
 557                     &rval);
 558                 if (error)
 559                         return (error);
 560                 bsd_to_linux_semid_ds(&semid, &linux_semid);
 561                 error = linux_semid_pushdown(args->cmd & LINUX_IPC_64,
 562                     &linux_semid, PTRIN(args->arg.buf));
 563                 if (error == 0)
 564                         td->td_retval[0] = (cmd == SEM_STAT) ? rval : 0;
 565                 return (error);
 566         case LINUX_IPC_INFO:
 567         case LINUX_SEM_INFO:
 568                 bcopy(&seminfo, &linux_seminfo.semmni, sizeof(linux_seminfo) -
 569                     sizeof(linux_seminfo.semmap) );
 570                 /*
 571                  * Linux does not use the semmap field but populates it with
 572                  * the defined value from SEMMAP, which really is redefined to
 573                  * SEMMNS, which they define as SEMMNI * SEMMSL.  Try to
 574                  * simulate this returning our dynamic semmns value.
 575                  */
 576                 linux_seminfo.semmap = linux_seminfo.semmns;
 577 /* XXX BSD equivalent?
 578 #define used_semids 10
 579 #define used_sems 10
 580                 linux_seminfo.semusz = used_semids;
 581                 linux_seminfo.semaem = used_sems;
 582 */
 583                 error = copyout(&linux_seminfo,
 584                     PTRIN(args->arg.buf), sizeof(linux_seminfo));
 585                 if (error)
 586                         return (error);
 587                 td->td_retval[0] = seminfo.semmni;
 588                 return (0);                     /* No need for __semctl call */
 589         case LINUX_GETALL:
 590                 cmd = GETALL;
 591                 semun.val = args->arg.val;
 592                 break;
 593         case LINUX_SETALL:
 594                 cmd = SETALL;
 595                 semun.val = args->arg.val;
 596                 break;
 597         default:
 598                 linux_msg(td, "ipc type %d is not implemented",
 599                   args->cmd & ~LINUX_IPC_64);
 600                 return (EINVAL);
 601         }
 602         return (kern_semctl(td, args->semid, args->semnum, cmd, &semun,
 603             td->td_retval));
 604 }
 605
 606 int
 607 linux_msgsnd(struct thread *td, struct linux_msgsnd_args *args)
 608 {
 609         const void *msgp;
 610         long mtype;
 611         l_long lmtype;
 612         int error;
 613
 614         if ((l_long)args->msgsz < 0 || args->msgsz > (l_long)msginfo.msgmax)
 615                 return (EINVAL);
 616         msgp = PTRIN(args->msgp);
 617         if ((error = copyin(msgp, &lmtype, sizeof(lmtype))) != 0)
 618                 return (error);
 619         mtype = (long)lmtype;
 620         return (kern_msgsnd(td, args->msqid,
 621             (const char *)msgp + sizeof(lmtype),
 622             args->msgsz, args->msgflg, mtype));
 623 }
 624
 625 int
 626 linux_msgrcv(struct thread *td, struct linux_msgrcv_args *args)
 627 {
 628         void *msgp;
 629         long mtype;
 630         l_long lmtype;
 631         int error;
 632
 633         if ((l_long)args->msgsz < 0 || args->msgsz > (l_long)msginfo.msgmax)
 634                 return (EINVAL);
 635         msgp = PTRIN(args->msgp);
 636         if ((error = kern_msgrcv(td, args->msqid,
 637             (char *)msgp + sizeof(lmtype), args->msgsz,
 638             args->msgtyp, args->msgflg, &mtype)) != 0)
 639                 return (error);
 640         lmtype = (l_long)mtype;
 641         return (copyout(&lmtype, msgp, sizeof(lmtype)));
 642 }
 643
 644 int
 645 linux_msgget(struct thread *td, struct linux_msgget_args *args)
 646 {
 647         struct msgget_args /* {
 648                 key_t   key;
 649                 int     msgflg;
 650         } */ bsd_args;
 651
 652         bsd_args.key = args->key;
 653         bsd_args.msgflg = args->msgflg;
 654         return (sys_msgget(td, &bsd_args));
 655 }
 656
 657 int
 658 linux_msgctl(struct thread *td, struct linux_msgctl_args *args)
 659 {
 660         int error, bsd_cmd;
 661         struct l_msqid_ds linux_msqid;
 662         struct msqid_ds bsd_msqid;
 663
 664         bsd_cmd = args->cmd & ~LINUX_IPC_64;
 665         switch (bsd_cmd) {
 666         case LINUX_IPC_INFO:
 667         case LINUX_MSG_INFO: {
 668                 struct l_msginfo linux_msginfo;
 669
 670                 /*
 671                  * XXX MSG_INFO uses the same data structure but returns different
 672                  * dynamic counters in msgpool, msgmap, and msgtql fields.
 673                  */
 674                 linux_msginfo.msgpool = (long)msginfo.msgmni *
 675                     (long)msginfo.msgmnb / 1024L;       /* XXX MSG_INFO. */
 676                 linux_msginfo.msgmap = msginfo.msgmnb;  /* XXX MSG_INFO. */
 677                 linux_msginfo.msgmax = msginfo.msgmax;
 678                 linux_msginfo.msgmnb = msginfo.msgmnb;
 679                 linux_msginfo.msgmni = msginfo.msgmni;
 680                 linux_msginfo.msgssz = msginfo.msgssz;
 681                 linux_msginfo.msgtql = msginfo.msgtql;  /* XXX MSG_INFO. */
 682                 linux_msginfo.msgseg = msginfo.msgseg;
 683                 error = copyout(&linux_msginfo, PTRIN(args->buf),
 684                     sizeof(linux_msginfo));
 685                 if (error == 0)
 686                     td->td_retval[0] = msginfo.msgmni;  /* XXX */
 687
 688                 return (error);
 689         }
 690
 691         /*
 692          * TODO: implement this
 693          * case LINUX_MSG_STAT:
 694          */
 695         case LINUX_IPC_STAT:
 696                 /* NOTHING */
 697                 break;
 698
 699         case LINUX_IPC_SET:
 700                 error = linux_msqid_pullup(args->cmd & LINUX_IPC_64,
 701                     &linux_msqid, PTRIN(args->buf));
 702                 if (error)
 703                         return (error);
 704                 linux_to_bsd_msqid_ds(&linux_msqid, &bsd_msqid);
 705                 break;
 706
 707         case LINUX_IPC_RMID:
 708                 /* NOTHING */
 709                 break;
 710
 711         default:
 712                 return (EINVAL);
 713                 break;
 714         }
 715
 716         error = kern_msgctl(td, args->msqid, bsd_cmd, &bsd_msqid);
 717         if (error != 0)
 718                 if (bsd_cmd != LINUX_IPC_RMID || error != EINVAL)
 719                         return (error);
 720
 721         if (bsd_cmd == LINUX_IPC_STAT) {
 722                 bsd_to_linux_msqid_ds(&bsd_msqid, &linux_msqid);
 723                 return (linux_msqid_pushdown(args->cmd & LINUX_IPC_64,
 724                     &linux_msqid, PTRIN(args->buf)));
 725         }
 726
 727         return (0);
 728 }
 729
 730 int
 731 linux_shmat(struct thread *td, struct linux_shmat_args *args)
 732 {
 733         struct shmat_args /* {
 734                 int shmid;
 735                 void *shmaddr;
 736                 int shmflg;
 737         } */ bsd_args;
 738         int error;
 739 #if defined(__i386__) || (defined(__amd64__) && defined(COMPAT_LINUX32))
 740         l_uintptr_t addr;
 741 #endif
 742
 743         bsd_args.shmid = args->shmid;
 744         bsd_args.shmaddr = PTRIN(args->shmaddr);
 745         bsd_args.shmflg = args->shmflg;
 746         if ((error = sys_shmat(td, &bsd_args)))
 747                 return (error);
 748 #if defined(__i386__) || (defined(__amd64__) && defined(COMPAT_LINUX32))
 749         addr = td->td_retval[0];
 750         if ((error = copyout(&addr, PTRIN(args->raddr), sizeof(addr))))
 751                 return (error);
 752         td->td_retval[0] = 0;
 753 #endif
 754         return (0);
 755 }
 756
 757 int
 758 linux_shmdt(struct thread *td, struct linux_shmdt_args *args)
 759 {
 760         struct shmdt_args /* {
 761                 void *shmaddr;
 762         } */ bsd_args;
 763
 764         bsd_args.shmaddr = PTRIN(args->shmaddr);
 765         return (sys_shmdt(td, &bsd_args));
 766 }
 767
 768 int
 769 linux_shmget(struct thread *td, struct linux_shmget_args *args)
 770 {
 771         struct shmget_args /* {
 772                 key_t key;
 773                 int size;
 774                 int shmflg;
 775         } */ bsd_args;
 776
 777         bsd_args.key = args->key;
 778         bsd_args.size = args->size;
 779         bsd_args.shmflg = args->shmflg;
 780         return (sys_shmget(td, &bsd_args));
 781 }
 782
 783 int
 784 linux_shmctl(struct thread *td, struct linux_shmctl_args *args)
 785 {
 786         struct l_shmid_ds linux_shmid;
 787         struct l_shminfo linux_shminfo;
 788         struct l_shm_info linux_shm_info;
 789         struct shmid_ds bsd_shmid;
 790         int error;
 791
 792         switch (args->cmd & ~LINUX_IPC_64) {
 793
 794         case LINUX_IPC_INFO: {
 795                 struct shminfo bsd_shminfo;
 796
 797                 /* Perform shmctl wanting removed segments lookup */
 798                 error = kern_shmctl(td, args->shmid, IPC_INFO,
 799                     (void *)&bsd_shminfo, NULL);
 800                 if (error)
 801                         return (error);
 802
 803                 bsd_to_linux_shminfo(&bsd_shminfo, &linux_shminfo);
 804
 805                 return (linux_shminfo_pushdown(args->cmd & LINUX_IPC_64,
 806                     &linux_shminfo, PTRIN(args->buf)));
 807         }
 808
 809         case LINUX_SHM_INFO: {
 810                 struct shm_info bsd_shm_info;
 811
 812                 /* Perform shmctl wanting removed segments lookup */
 813                 error = kern_shmctl(td, args->shmid, SHM_INFO,
 814                     (void *)&bsd_shm_info, NULL);
 815                 if (error)
 816                         return (error);
 817
 818                 bsd_to_linux_shm_info(&bsd_shm_info, &linux_shm_info);
 819
 820                 return (copyout(&linux_shm_info, PTRIN(args->buf),
 821                     sizeof(struct l_shm_info)));
 822         }
 823
 824         case LINUX_IPC_STAT:
 825                 /* Perform shmctl wanting removed segments lookup */
 826                 error = kern_shmctl(td, args->shmid, IPC_STAT,
 827                     (void *)&bsd_shmid, NULL);
 828                 if (error)
 829                         return (error);
 830
 831                 bsd_to_linux_shmid_ds(&bsd_shmid, &linux_shmid);
 832
 833                 return (linux_shmid_pushdown(args->cmd & LINUX_IPC_64,
 834                     &linux_shmid, PTRIN(args->buf)));
 835
 836         case LINUX_SHM_STAT:
 837                 /* Perform shmctl wanting removed segments lookup */
 838                 error = kern_shmctl(td, args->shmid, IPC_STAT,
 839                     (void *)&bsd_shmid, NULL);
 840                 if (error)
 841                         return (error);
 842
 843                 bsd_to_linux_shmid_ds(&bsd_shmid, &linux_shmid);
 844
 845                 return (linux_shmid_pushdown(args->cmd & LINUX_IPC_64,
 846                     &linux_shmid, PTRIN(args->buf)));
 847
 848         case LINUX_IPC_SET:
 849                 error = linux_shmid_pullup(args->cmd & LINUX_IPC_64,
 850                     &linux_shmid, PTRIN(args->buf));
 851                 if (error)
 852                         return (error);
 853
 854                 linux_to_bsd_shmid_ds(&linux_shmid, &bsd_shmid);
 855
 856                 /* Perform shmctl wanting removed segments lookup */
 857                 return (kern_shmctl(td, args->shmid, IPC_SET,
 858                     (void *)&bsd_shmid, NULL));
 859
 860         case LINUX_IPC_RMID: {
 861                 void *buf;
 862
 863                 if (args->buf == 0)
 864                         buf = NULL;
 865                 else {
 866                         error = linux_shmid_pullup(args->cmd & LINUX_IPC_64,
 867                             &linux_shmid, PTRIN(args->buf));
 868                         if (error)
 869                                 return (error);
 870                         linux_to_bsd_shmid_ds(&linux_shmid, &bsd_shmid);
 871                         buf = (void *)&bsd_shmid;
 872                 }
 873                 return (kern_shmctl(td, args->shmid, IPC_RMID, buf, NULL));
 874         }
 875
 876         case LINUX_SHM_LOCK:
 877                 /* FALLTHROUGH */
 878         case LINUX_SHM_UNLOCK:
 879                 /* FALLTHROUGH */
 880         default:
 881                 linux_msg(td, "ipc type %d not implemented",
 882                     args->cmd & ~LINUX_IPC_64);
 883                 return (EINVAL);
 884         }
 885 }
 886
 887 MODULE_DEPEND(linux, sysvmsg, 1, 1, 1);
 888 MODULE_DEPEND(linux, sysvsem, 1, 1, 1);
 889 MODULE_DEPEND(linux, sysvshm, 1, 1, 1);