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         lpp->shmmax = bpp->shmmax;
 101         lpp->shmmin = bpp->shmmin;
 102         lpp->shmmni = bpp->shmmni;
 103         lpp->shmseg = bpp->shmseg;
 104         lpp->shmall = bpp->shmall;
 105 }
 106
 107 static void
 108 bsd_to_linux_shm_info( struct shm_info *bpp, struct l_shm_info *lpp)
 109 {
 110         lpp->used_ids = bpp->used_ids ;
 111         lpp->shm_tot = bpp->shm_tot ;
 112         lpp->shm_rss = bpp->shm_rss ;
 113         lpp->shm_swp = bpp->shm_swp ;
 114         lpp->swap_attempts = bpp->swap_attempts ;
 115         lpp->swap_successes = bpp->swap_successes ;
 116 }
 117
 118 struct l_ipc_perm {
 119         l_key_t         key;
 120         l_uid16_t       uid;
 121         l_gid16_t       gid;
 122         l_uid16_t       cuid;
 123         l_gid16_t       cgid;
 124         l_ushort        mode;
 125         l_ushort        seq;
 126 };
 127
 128 static void
 129 linux_to_bsd_ipc_perm(struct l_ipc_perm *lpp, struct ipc_perm *bpp)
 130 {
 131     bpp->key = lpp->key;
 132     bpp->uid = lpp->uid;
 133     bpp->gid = lpp->gid;
 134     bpp->cuid = lpp->cuid;
 135     bpp->cgid = lpp->cgid;
 136     bpp->mode = lpp->mode;
 137     bpp->seq = lpp->seq;
 138 }
 139
 140
 141 static void
 142 bsd_to_linux_ipc_perm(struct ipc_perm *bpp, struct l_ipc_perm *lpp)
 143 {
 144     lpp->key = bpp->key;
 145     lpp->uid = bpp->uid;
 146     lpp->gid = bpp->gid;
 147     lpp->cuid = bpp->cuid;
 148     lpp->cgid = bpp->cgid;
 149     lpp->mode = bpp->mode;
 150     lpp->seq = bpp->seq;
 151 }
 152
 153 struct l_msqid_ds {
 154         struct l_ipc_perm       msg_perm;
 155         l_uintptr_t             msg_first;      /* first message on queue,unused */
 156         l_uintptr_t             msg_last;       /* last message in queue,unused */
 157         l_time_t                msg_stime;      /* last msgsnd time */
 158         l_time_t                msg_rtime;      /* last msgrcv time */
 159         l_time_t                msg_ctime;      /* last change time */
 160         l_ulong                 msg_lcbytes;    /* Reuse junk fields for 32 bit */
 161         l_ulong                 msg_lqbytes;    /* ditto */
 162         l_ushort                msg_cbytes;     /* current number of bytes on queue */
 163         l_ushort                msg_qnum;       /* number of messages in queue */
 164         l_ushort                msg_qbytes;     /* max number of bytes on queue */
 165         l_pid_t                 msg_lspid;      /* pid of last msgsnd */
 166         l_pid_t                 msg_lrpid;      /* last receive pid */
 167 }
 168 #if defined(__amd64__) && defined(COMPAT_LINUX32)
 169 __packed
 170 #endif
 171 ;
 172
 173 struct l_semid_ds {
 174         struct l_ipc_perm       sem_perm;
 175         l_time_t                sem_otime;
 176         l_time_t                sem_ctime;
 177         l_uintptr_t             sem_base;
 178         l_uintptr_t             sem_pending;
 179         l_uintptr_t             sem_pending_last;
 180         l_uintptr_t             undo;
 181         l_ushort                sem_nsems;
 182 }
 183 #if defined(__amd64__) && defined(COMPAT_LINUX32)
 184 __packed
 185 #endif
 186 ;
 187
 188 struct l_shmid_ds {
 189         struct l_ipc_perm       shm_perm;
 190         l_int                   shm_segsz;
 191         l_time_t                shm_atime;
 192         l_time_t                shm_dtime;
 193         l_time_t                shm_ctime;
 194         l_ushort                shm_cpid;
 195         l_ushort                shm_lpid;
 196         l_short                 shm_nattch;
 197         l_ushort                private1;
 198         l_uintptr_t             private2;
 199         l_uintptr_t             private3;
 200 };
 201
 202 static void
 203 linux_to_bsd_semid_ds(struct l_semid_ds *lsp, struct semid_ds *bsp)
 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     bsp->sem_base = PTRIN(lsp->sem_base);
 210 }
 211
 212 static void
 213 bsd_to_linux_semid_ds(struct semid_ds *bsp, struct l_semid_ds *lsp)
 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         lsp->sem_base = PTROUT(bsp->sem_base);
 220 }
 221
 222 static void
 223 linux_to_bsd_shmid_ds(struct l_shmid_ds *lsp, struct shmid_ds *bsp)
 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_shmid_ds *lsp)
 237 {
 238     bsd_to_linux_ipc_perm(&bsp->shm_perm, &lsp->shm_perm);
 239     if (bsp->shm_segsz > INT_MAX)
 240             lsp->shm_segsz = INT_MAX;
 241     else
 242             lsp->shm_segsz = bsp->shm_segsz;
 243     lsp->shm_lpid = bsp->shm_lpid;
 244     lsp->shm_cpid = bsp->shm_cpid;
 245     if (bsp->shm_nattch > SHRT_MAX)
 246             lsp->shm_nattch = SHRT_MAX;
 247     else
 248             lsp->shm_nattch = bsp->shm_nattch;
 249     lsp->shm_atime = bsp->shm_atime;
 250     lsp->shm_dtime = bsp->shm_dtime;
 251     lsp->shm_ctime = bsp->shm_ctime;
 252     lsp->private3 = 0;
 253 }
 254
 255 static void
 256 linux_to_bsd_msqid_ds(struct l_msqid_ds *lsp, struct msqid_ds *bsp)
 257 {
 258     linux_to_bsd_ipc_perm(&lsp->msg_perm, &bsp->msg_perm);
 259     bsp->msg_cbytes = lsp->msg_cbytes;
 260     bsp->msg_qnum = lsp->msg_qnum;
 261     bsp->msg_qbytes = lsp->msg_qbytes;
 262     bsp->msg_lspid = lsp->msg_lspid;
 263     bsp->msg_lrpid = lsp->msg_lrpid;
 264     bsp->msg_stime = lsp->msg_stime;
 265     bsp->msg_rtime = lsp->msg_rtime;
 266     bsp->msg_ctime = lsp->msg_ctime;
 267 }
 268
 269 static void
 270 bsd_to_linux_msqid_ds(struct msqid_ds *bsp, struct l_msqid_ds *lsp)
 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
 360 static int
 361 linux_semid_pullup(l_int ver, struct l_semid_ds *linux_semid, caddr_t uaddr)
 362 {
 363         struct l_semid64_ds linux_semid64;
 364         int error;
 365
 366         if (ver == LINUX_IPC_64) {
 367                 error = copyin(uaddr, &linux_semid64, sizeof(linux_semid64));
 368                 if (error != 0)
 369                         return (error);
 370
 371                 bzero(linux_semid, sizeof(*linux_semid));
 372
 373                 linux_semid->sem_perm.uid = linux_semid64.sem_perm.uid;
 374                 linux_semid->sem_perm.gid = linux_semid64.sem_perm.gid;
 375                 linux_semid->sem_perm.mode = linux_semid64.sem_perm.mode;
 376         } else {
 377                 error = copyin(uaddr, linux_semid, sizeof(*linux_semid));
 378         }
 379         return (error);
 380 }
 381
 382 static int
 383 linux_semid_pushdown(l_int ver, struct l_semid_ds *linux_semid, caddr_t uaddr)
 384 {
 385         struct l_semid64_ds linux_semid64;
 386
 387         if (ver == LINUX_IPC_64) {
 388                 bzero(&linux_semid64, sizeof(linux_semid64));
 389
 390                 linux_ipc_perm_to_ipc64_perm(&linux_semid->sem_perm,
 391                     &linux_semid64.sem_perm);
 392
 393                 linux_semid64.sem_otime = linux_semid->sem_otime;
 394                 linux_semid64.sem_ctime = linux_semid->sem_ctime;
 395                 linux_semid64.sem_nsems = linux_semid->sem_nsems;
 396
 397                 return (copyout(&linux_semid64, uaddr, sizeof(linux_semid64)));
 398         } else {
 399                 return (copyout(linux_semid, uaddr, sizeof(*linux_semid)));
 400         }
 401 }
 402
 403 static int
 404 linux_shmid_pullup(l_int ver, struct l_shmid_ds *linux_shmid, caddr_t uaddr)
 405 {
 406         struct l_shmid64_ds linux_shmid64;
 407         int error;
 408
 409         if (ver == LINUX_IPC_64) {
 410                 error = copyin(uaddr, &linux_shmid64, sizeof(linux_shmid64));
 411                 if (error != 0)
 412                         return (error);
 413
 414                 bzero(linux_shmid, sizeof(*linux_shmid));
 415
 416                 linux_shmid->shm_perm.uid = linux_shmid64.shm_perm.uid;
 417                 linux_shmid->shm_perm.gid = linux_shmid64.shm_perm.gid;
 418                 linux_shmid->shm_perm.mode = linux_shmid64.shm_perm.mode;
 419         } else {
 420                 error = copyin(uaddr, linux_shmid, sizeof(*linux_shmid));
 421         }
 422         return (error);
 423 }
 424
 425 static int
 426 linux_shmid_pushdown(l_int ver, struct l_shmid_ds *linux_shmid, caddr_t uaddr)
 427 {
 428         struct l_shmid64_ds linux_shmid64;
 429
 430         /*
 431          * XXX: This is backwards and loses information in shm_nattch
 432          * and shm_segsz.  We should probably either expose the BSD
 433          * shmid structure directly and convert it to either the
 434          * non-64 or 64 variant directly or the code should always
 435          * convert to the 64 variant and then truncate values into the
 436          * non-64 variant if needed since the 64 variant has more
 437          * precision.
 438          */
 439         if (ver == LINUX_IPC_64) {
 440                 bzero(&linux_shmid64, sizeof(linux_shmid64));
 441
 442                 linux_ipc_perm_to_ipc64_perm(&linux_shmid->shm_perm,
 443                     &linux_shmid64.shm_perm);
 444
 445                 linux_shmid64.shm_segsz = linux_shmid->shm_segsz;
 446                 linux_shmid64.shm_atime = linux_shmid->shm_atime;
 447                 linux_shmid64.shm_dtime = linux_shmid->shm_dtime;
 448                 linux_shmid64.shm_ctime = linux_shmid->shm_ctime;
 449                 linux_shmid64.shm_cpid = linux_shmid->shm_cpid;
 450                 linux_shmid64.shm_lpid = linux_shmid->shm_lpid;
 451                 linux_shmid64.shm_nattch = linux_shmid->shm_nattch;
 452
 453                 return (copyout(&linux_shmid64, uaddr, sizeof(linux_shmid64)));
 454         } else {
 455                 return (copyout(linux_shmid, uaddr, sizeof(*linux_shmid)));
 456         }
 457 }
 458
 459 static int
 460 linux_shminfo_pushdown(l_int ver, struct l_shminfo *linux_shminfo,
 461     caddr_t uaddr)
 462 {
 463         struct l_shminfo64 linux_shminfo64;
 464
 465         if (ver == LINUX_IPC_64) {
 466                 bzero(&linux_shminfo64, sizeof(linux_shminfo64));
 467
 468                 linux_shminfo64.shmmax = linux_shminfo->shmmax;
 469                 linux_shminfo64.shmmin = linux_shminfo->shmmin;
 470                 linux_shminfo64.shmmni = linux_shminfo->shmmni;
 471                 linux_shminfo64.shmseg = linux_shminfo->shmseg;
 472                 linux_shminfo64.shmall = linux_shminfo->shmall;
 473
 474                 return (copyout(&linux_shminfo64, uaddr,
 475                     sizeof(linux_shminfo64)));
 476         } else {
 477                 return (copyout(linux_shminfo, uaddr, sizeof(*linux_shminfo)));
 478         }
 479 }
 480
 481 int
 482 linux_semop(struct thread *td, struct linux_semop_args *args)
 483 {
 484         struct semop_args /* {
 485         int     semid;
 486         struct  sembuf *sops;
 487         int             nsops;
 488         } */ bsd_args;
 489
 490         bsd_args.semid = args->semid;
 491         bsd_args.sops = PTRIN(args->tsops);
 492         bsd_args.nsops = args->nsops;
 493         return semop(td, &bsd_args);
 494 }
 495
 496 int
 497 linux_semget(struct thread *td, struct linux_semget_args *args)
 498 {
 499         struct semget_args /* {
 500         key_t   key;
 501         int             nsems;
 502         int             semflg;
 503         } */ bsd_args;
 504
 505         if (args->nsems < 0)
 506                 return (EINVAL);
 507         bsd_args.key = args->key;
 508         bsd_args.nsems = args->nsems;
 509         bsd_args.semflg = args->semflg;
 510         return semget(td, &bsd_args);
 511 }
 512
 513 int
 514 linux_semctl(struct thread *td, struct linux_semctl_args *args)
 515 {
 516         struct l_semid_ds linux_semid;
 517         struct l_seminfo linux_seminfo;
 518         struct semid_ds semid;
 519         union semun semun;
 520         register_t rval;
 521         int cmd, error;
 522
 523         switch (args->cmd & ~LINUX_IPC_64) {
 524         case LINUX_IPC_RMID:
 525                 cmd = IPC_RMID;
 526                 break;
 527         case LINUX_GETNCNT:
 528                 cmd = GETNCNT;
 529                 break;
 530         case LINUX_GETPID:
 531                 cmd = GETPID;
 532                 break;
 533         case LINUX_GETVAL:
 534                 cmd = GETVAL;
 535                 break;
 536         case LINUX_GETZCNT:
 537                 cmd = GETZCNT;
 538                 break;
 539         case LINUX_SETVAL:
 540                 cmd = SETVAL;
 541                 semun.val = args->arg.val;
 542                 break;
 543         case LINUX_IPC_SET:
 544                 cmd = IPC_SET;
 545                 error = linux_semid_pullup(args->cmd & LINUX_IPC_64,
 546                     &linux_semid, PTRIN(args->arg.buf));
 547                 if (error)
 548                         return (error);
 549                 linux_to_bsd_semid_ds(&linux_semid, &semid);
 550                 semun.buf = &semid;
 551                 return (kern_semctl(td, args->semid, args->semnum, cmd, &semun,
 552                     td->td_retval));
 553         case LINUX_IPC_STAT:
 554         case LINUX_SEM_STAT:
 555                 if ((args->cmd & ~LINUX_IPC_64) == LINUX_IPC_STAT)
 556                         cmd = IPC_STAT;
 557                 else
 558                         cmd = SEM_STAT;
 559                 semun.buf = &semid;
 560                 error = kern_semctl(td, args->semid, args->semnum, cmd, &semun,
 561                     &rval);
 562                 if (error)
 563                         return (error);
 564                 bsd_to_linux_semid_ds(&semid, &linux_semid);
 565                 error = linux_semid_pushdown(args->cmd & LINUX_IPC_64,
 566                     &linux_semid, PTRIN(args->arg.buf));
 567                 if (error == 0)
 568                         td->td_retval[0] = (cmd == SEM_STAT) ? rval : 0;
 569                 return (error);
 570         case LINUX_IPC_INFO:
 571         case LINUX_SEM_INFO:
 572                 bcopy(&seminfo, &linux_seminfo, sizeof(linux_seminfo) );
 573 /* XXX BSD equivalent?
 574 #define used_semids 10
 575 #define used_sems 10
 576                 linux_seminfo.semusz = used_semids;
 577                 linux_seminfo.semaem = used_sems;
 578 */
 579                 error = copyout(&linux_seminfo,
 580                     PTRIN(args->arg.buf), sizeof(linux_seminfo));
 581                 if (error)
 582                         return error;
 583                 td->td_retval[0] = seminfo.semmni;
 584                 return 0;                       /* No need for __semctl call */
 585         case LINUX_GETALL:
 586                 cmd = GETALL;
 587                 semun.val = args->arg.val;
 588                 break;
 589         case LINUX_SETALL:
 590                 cmd = SETALL;
 591                 semun.val = args->arg.val;
 592                 break;
 593         default:
 594                 linux_msg(td, "ipc type %d is not implemented",
 595                   args->cmd & ~LINUX_IPC_64);
 596                 return EINVAL;
 597         }
 598         return (kern_semctl(td, args->semid, args->semnum, cmd, &semun,
 599             td->td_retval));
 600 }
 601
 602 int
 603 linux_msgsnd(struct thread *td, struct linux_msgsnd_args *args)
 604 {
 605         const void *msgp;
 606         long mtype;
 607         l_long lmtype;
 608         int error;
 609
 610         if ((l_long)args->msgsz < 0 || args->msgsz > (l_long)msginfo.msgmax)
 611                 return (EINVAL);
 612         msgp = PTRIN(args->msgp);
 613         if ((error = copyin(msgp, &lmtype, sizeof(lmtype))) != 0)
 614                 return (error);
 615         mtype = (long)lmtype;
 616         return (kern_msgsnd(td, args->msqid,
 617             (const char *)msgp + sizeof(lmtype),
 618             args->msgsz, args->msgflg, mtype));
 619 }
 620
 621 int
 622 linux_msgrcv(struct thread *td, struct linux_msgrcv_args *args)
 623 {
 624         void *msgp;
 625         long mtype;
 626         l_long lmtype;
 627         int error;
 628
 629         if ((l_long)args->msgsz < 0 || args->msgsz > (l_long)msginfo.msgmax)
 630                 return (EINVAL);
 631         msgp = PTRIN(args->msgp);
 632         if ((error = kern_msgrcv(td, args->msqid,
 633             (char *)msgp + sizeof(lmtype), args->msgsz,
 634             args->msgtyp, args->msgflg, &mtype)) != 0)
 635                 return (error);
 636         lmtype = (l_long)mtype;
 637         return (copyout(&lmtype, msgp, sizeof(lmtype)));
 638 }
 639
 640 int
 641 linux_msgget(struct thread *td, struct linux_msgget_args *args)
 642 {
 643     struct msgget_args /* {
 644         key_t   key;
 645         int     msgflg;
 646     } */ bsd_args;
 647
 648     bsd_args.key = args->key;
 649     bsd_args.msgflg = args->msgflg;
 650     return msgget(td, &bsd_args);
 651 }
 652
 653 int
 654 linux_msgctl(struct thread *td, struct linux_msgctl_args *args)
 655 {
 656     int error, bsd_cmd;
 657     struct l_msqid_ds linux_msqid;
 658     struct msqid_ds bsd_msqid;
 659
 660     bsd_cmd = args->cmd & ~LINUX_IPC_64;
 661     switch (bsd_cmd) {
 662     case LINUX_IPC_INFO:
 663     case LINUX_MSG_INFO: {
 664         struct l_msginfo linux_msginfo;
 665
 666         /*
 667          * XXX MSG_INFO uses the same data structure but returns different
 668          * dynamic counters in msgpool, msgmap, and msgtql fields.
 669          */
 670         linux_msginfo.msgpool = (long)msginfo.msgmni *
 671             (long)msginfo.msgmnb / 1024L;       /* XXX MSG_INFO. */
 672         linux_msginfo.msgmap = msginfo.msgmnb;  /* XXX MSG_INFO. */
 673         linux_msginfo.msgmax = msginfo.msgmax;
 674         linux_msginfo.msgmnb = msginfo.msgmnb;
 675         linux_msginfo.msgmni = msginfo.msgmni;
 676         linux_msginfo.msgssz = msginfo.msgssz;
 677         linux_msginfo.msgtql = msginfo.msgtql;  /* XXX MSG_INFO. */
 678         linux_msginfo.msgseg = msginfo.msgseg;
 679         error = copyout(&linux_msginfo, PTRIN(args->buf),
 680             sizeof(linux_msginfo));
 681         if (error == 0)
 682             td->td_retval[0] = msginfo.msgmni;  /* XXX */
 683
 684         return (error);
 685     }
 686
 687 /*
 688  * TODO: implement this
 689  * case LINUX_MSG_STAT:
 690  */
 691     case LINUX_IPC_STAT:
 692         /* NOTHING */
 693         break;
 694
 695     case LINUX_IPC_SET:
 696         error = linux_msqid_pullup(args->cmd & LINUX_IPC_64,
 697             &linux_msqid, PTRIN(args->buf));
 698         if (error)
 699             return (error);
 700         linux_to_bsd_msqid_ds(&linux_msqid, &bsd_msqid);
 701         break;
 702
 703     case LINUX_IPC_RMID:
 704         /* NOTHING */
 705         break;
 706
 707     default:
 708         return (EINVAL);
 709         break;
 710     }
 711
 712     error = kern_msgctl(td, args->msqid, bsd_cmd, &bsd_msqid);
 713     if (error != 0)
 714         if (bsd_cmd != LINUX_IPC_RMID || error != EINVAL)
 715             return (error);
 716
 717     if (bsd_cmd == LINUX_IPC_STAT) {
 718         bsd_to_linux_msqid_ds(&bsd_msqid, &linux_msqid);
 719         return (linux_msqid_pushdown(args->cmd & LINUX_IPC_64,
 720           &linux_msqid, PTRIN(args->buf)));
 721     }
 722
 723     return (0);
 724 }
 725
 726 int
 727 linux_shmat(struct thread *td, struct linux_shmat_args *args)
 728 {
 729     struct shmat_args /* {
 730         int shmid;
 731         void *shmaddr;
 732         int shmflg;
 733     } */ bsd_args;
 734     int error;
 735 #if defined(__i386__) || (defined(__amd64__) && defined(COMPAT_LINUX32))
 736     l_uintptr_t addr;
 737 #endif
 738
 739     bsd_args.shmid = args->shmid;
 740     bsd_args.shmaddr = PTRIN(args->shmaddr);
 741     bsd_args.shmflg = args->shmflg;
 742     if ((error = shmat(td, &bsd_args)))
 743         return error;
 744 #if defined(__i386__) || (defined(__amd64__) && defined(COMPAT_LINUX32))
 745     addr = td->td_retval[0];
 746     if ((error = copyout(&addr, PTRIN(args->raddr), sizeof(addr))))
 747         return error;
 748     td->td_retval[0] = 0;
 749 #endif
 750     return 0;
 751 }
 752
 753 int
 754 linux_shmdt(struct thread *td, struct linux_shmdt_args *args)
 755 {
 756     struct shmdt_args /* {
 757         void *shmaddr;
 758     } */ bsd_args;
 759
 760     bsd_args.shmaddr = PTRIN(args->shmaddr);
 761     return shmdt(td, &bsd_args);
 762 }
 763
 764 int
 765 linux_shmget(struct thread *td, struct linux_shmget_args *args)
 766 {
 767     struct shmget_args /* {
 768         key_t key;
 769         int size;
 770         int shmflg;
 771     } */ bsd_args;
 772
 773     bsd_args.key = args->key;
 774     bsd_args.size = args->size;
 775     bsd_args.shmflg = args->shmflg;
 776     return shmget(td, &bsd_args);
 777 }
 778
 779 int
 780 linux_shmctl(struct thread *td, struct linux_shmctl_args *args)
 781 {
 782     struct l_shmid_ds linux_shmid;
 783         struct l_shminfo linux_shminfo;
 784         struct l_shm_info linux_shm_info;
 785         struct shmid_ds bsd_shmid;
 786     int error;
 787
 788     switch (args->cmd & ~LINUX_IPC_64) {
 789
 790         case LINUX_IPC_INFO: {
 791             struct shminfo bsd_shminfo;
 792
 793             /* Perform shmctl wanting removed segments lookup */
 794             error = kern_shmctl(td, args->shmid, IPC_INFO,
 795                 (void *)&bsd_shminfo, NULL);
 796             if (error)
 797                 return error;
 798
 799             bsd_to_linux_shminfo(&bsd_shminfo, &linux_shminfo);
 800
 801             return (linux_shminfo_pushdown(args->cmd & LINUX_IPC_64,
 802                &linux_shminfo, PTRIN(args->buf)));
 803         }
 804
 805         case LINUX_SHM_INFO: {
 806             struct shm_info bsd_shm_info;
 807
 808             /* Perform shmctl wanting removed segments lookup */
 809             error = kern_shmctl(td, args->shmid, SHM_INFO,
 810                 (void *)&bsd_shm_info, NULL);
 811             if (error)
 812                 return error;
 813
 814             bsd_to_linux_shm_info(&bsd_shm_info, &linux_shm_info);
 815
 816             return copyout(&linux_shm_info, PTRIN(args->buf),
 817                 sizeof(struct l_shm_info));
 818         }
 819
 820         case LINUX_IPC_STAT:
 821             /* Perform shmctl wanting removed segments lookup */
 822             error = kern_shmctl(td, args->shmid, IPC_STAT,
 823                 (void *)&bsd_shmid, NULL);
 824             if (error)
 825                 return error;
 826
 827             bsd_to_linux_shmid_ds(&bsd_shmid, &linux_shmid);
 828
 829             return (linux_shmid_pushdown(args->cmd & LINUX_IPC_64,
 830           &linux_shmid, PTRIN(args->buf)));
 831
 832     case LINUX_SHM_STAT:
 833         /* Perform shmctl wanting removed segments lookup */
 834         error = kern_shmctl(td, args->shmid, IPC_STAT,
 835             (void *)&bsd_shmid, NULL);
 836         if (error)
 837                 return error;
 838
 839         bsd_to_linux_shmid_ds(&bsd_shmid, &linux_shmid);
 840
 841         return (linux_shmid_pushdown(args->cmd & LINUX_IPC_64,
 842            &linux_shmid, PTRIN(args->buf)));
 843
 844     case LINUX_IPC_SET:
 845         error = linux_shmid_pullup(args->cmd & LINUX_IPC_64,
 846           &linux_shmid, PTRIN(args->buf));
 847         if (error)
 848                 return error;
 849
 850         linux_to_bsd_shmid_ds(&linux_shmid, &bsd_shmid);
 851
 852         /* Perform shmctl wanting removed segments lookup */
 853         return kern_shmctl(td, args->shmid, IPC_SET,
 854             (void *)&bsd_shmid, NULL);
 855
 856     case LINUX_IPC_RMID: {
 857         void *buf;
 858
 859         if (args->buf == 0)
 860                 buf = NULL;
 861         else {
 862                 error = linux_shmid_pullup(args->cmd & LINUX_IPC_64,
 863                     &linux_shmid, PTRIN(args->buf));
 864                 if (error)
 865                         return error;
 866                 linux_to_bsd_shmid_ds(&linux_shmid, &bsd_shmid);
 867                 buf = (void *)&bsd_shmid;
 868         }
 869         return kern_shmctl(td, args->shmid, IPC_RMID, buf, NULL);
 870     }
 871
 872     case LINUX_SHM_LOCK:
 873     case LINUX_SHM_UNLOCK:
 874     default:
 875         linux_msg(td, "ipc type %d not implemented", args->cmd & ~LINUX_IPC_64);
 876         return EINVAL;
 877     }
 878 }
 879
 880 MODULE_DEPEND(linux, sysvmsg, 1, 1, 1);
 881 MODULE_DEPEND(linux, sysvsem, 1, 1, 1);
 882 MODULE_DEPEND(linux, sysvshm, 1, 1, 1);