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/param.h>
  30 #include <sys/limits.h>
  31 #include <sys/msg.h>
  32 #include <sys/proc.h>
  33 #include <sys/sem.h>
  34 #include <sys/shm.h>
  35 #include <sys/stat.h>
  36 #include <sys/syscallsubr.h>
  37 #include <sys/sysent.h>
  38 #include <sys/sysproto.h>
  39
  40 #ifdef COMPAT_LINUX32
  41 #include <machine/../linux32/linux.h>
  42 #include <machine/../linux32/linux32_proto.h>
  43 #else
  44 #include <machine/../linux/linux.h>
  45 #include <machine/../linux/linux_proto.h>
  46 #endif
  47 #include <compat/linux/linux_ipc.h>
  48 #include <compat/linux/linux_ipc64.h>
  49 #include <compat/linux/linux_time.h>
  50 #include <compat/linux/linux_util.h>
  51
  52 /*
  53  * old, pre 2.4 kernel
  54  */
  55 struct l_ipc_perm {
  56         l_key_t         key;
  57         l_uid16_t       uid;
  58         l_gid16_t       gid;
  59         l_uid16_t       cuid;
  60         l_gid16_t       cgid;
  61         l_ushort        mode;
  62         l_ushort        seq;
  63 };
  64
  65 struct l_seminfo {
  66         l_int semmap;
  67         l_int semmni;
  68         l_int semmns;
  69         l_int semmnu;
  70         l_int semmsl;
  71         l_int semopm;
  72         l_int semume;
  73         l_int semusz;
  74         l_int semvmx;
  75         l_int semaem;
  76 };
  77
  78 struct l_shminfo {
  79         l_int shmmax;
  80         l_int shmmin;
  81         l_int shmmni;
  82         l_int shmseg;
  83         l_int shmall;
  84 };
  85
  86 struct l_shm_info {
  87         l_int used_ids;
  88         l_ulong shm_tot;  /* total allocated shm */
  89         l_ulong shm_rss;  /* total resident shm */
  90         l_ulong shm_swp;  /* total swapped shm */
  91         l_ulong swap_attempts;
  92         l_ulong swap_successes;
  93 };
  94
  95 struct l_msginfo {
  96         l_int msgpool;
  97         l_int msgmap;
  98         l_int msgmax;
  99         l_int msgmnb;
 100         l_int msgmni;
 101         l_int msgssz;
 102         l_int msgtql;
 103         l_ushort msgseg;
 104 };
 105
 106 static void
 107 bsd_to_linux_shminfo( struct shminfo *bpp, struct l_shminfo64 *lpp)
 108 {
 109
 110         lpp->shmmax = bpp->shmmax;
 111         lpp->shmmin = bpp->shmmin;
 112         lpp->shmmni = bpp->shmmni;
 113         lpp->shmseg = bpp->shmseg;
 114         lpp->shmall = bpp->shmall;
 115 }
 116
 117 static void
 118 bsd_to_linux_shm_info( struct shm_info *bpp, struct l_shm_info *lpp)
 119 {
 120
 121         lpp->used_ids = bpp->used_ids;
 122         lpp->shm_tot = bpp->shm_tot;
 123         lpp->shm_rss = bpp->shm_rss;
 124         lpp->shm_swp = bpp->shm_swp;
 125         lpp->swap_attempts = bpp->swap_attempts;
 126         lpp->swap_successes = bpp->swap_successes;
 127 }
 128
 129 static void
 130 linux_to_bsd_ipc_perm(struct l_ipc64_perm *lpp, struct ipc_perm *bpp)
 131 {
 132
 133         bpp->key = lpp->key;
 134         bpp->uid = lpp->uid;
 135         bpp->gid = lpp->gid;
 136         bpp->cuid = lpp->cuid;
 137         bpp->cgid = lpp->cgid;
 138         bpp->mode = lpp->mode;
 139         bpp->seq = lpp->seq;
 140 }
 141
 142 static void
 143 bsd_to_linux_ipc_perm(struct ipc_perm *bpp, struct l_ipc64_perm *lpp)
 144 {
 145
 146         lpp->key = bpp->key;
 147         lpp->uid = bpp->uid;
 148         lpp->gid = bpp->gid;
 149         lpp->cuid = bpp->cuid;
 150         lpp->cgid = bpp->cgid;
 151         lpp->mode = bpp->mode & (S_IRWXU|S_IRWXG|S_IRWXO);
 152         lpp->seq = bpp->seq;
 153 }
 154
 155 struct l_msqid_ds {
 156         struct l_ipc_perm       msg_perm;
 157         l_uintptr_t             msg_first;      /* first message on queue,unused */
 158         l_uintptr_t             msg_last;       /* last message in queue,unused */
 159         l_time_t                msg_stime;      /* last msgsnd time */
 160         l_time_t                msg_rtime;      /* last msgrcv time */
 161         l_time_t                msg_ctime;      /* last change time */
 162         l_ulong                 msg_lcbytes;    /* Reuse junk fields for 32 bit */
 163         l_ulong                 msg_lqbytes;    /* ditto */
 164         l_ushort                msg_cbytes;     /* current number of bytes on queue */
 165         l_ushort                msg_qnum;       /* number of messages in queue */
 166         l_ushort                msg_qbytes;     /* max number of bytes on queue */
 167         l_pid_t                 msg_lspid;      /* pid of last msgsnd */
 168         l_pid_t                 msg_lrpid;      /* last receive pid */
 169 };
 170
 171 struct l_semid_ds {
 172         struct l_ipc_perm       sem_perm;
 173         l_time_t                sem_otime;
 174         l_time_t                sem_ctime;
 175         l_uintptr_t             sem_base;
 176         l_uintptr_t             sem_pending;
 177         l_uintptr_t             sem_pending_last;
 178         l_uintptr_t             undo;
 179         l_ushort                sem_nsems;
 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_semid64_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 }
 205
 206 static void
 207 bsd_to_linux_semid_ds(struct semid_ds *bsp, struct l_semid64_ds *lsp)
 208 {
 209
 210         bsd_to_linux_ipc_perm(&bsp->sem_perm, &lsp->sem_perm);
 211         lsp->sem_otime = bsp->sem_otime;
 212         lsp->sem_ctime = bsp->sem_ctime;
 213         lsp->sem_nsems = bsp->sem_nsems;
 214 }
 215
 216 static void
 217 linux_to_bsd_shmid_ds(struct l_shmid64_ds *lsp, struct shmid_ds *bsp)
 218 {
 219
 220         linux_to_bsd_ipc_perm(&lsp->shm_perm, &bsp->shm_perm);
 221         bsp->shm_segsz = lsp->shm_segsz;
 222         bsp->shm_lpid = lsp->shm_lpid;
 223         bsp->shm_cpid = lsp->shm_cpid;
 224         bsp->shm_nattch = lsp->shm_nattch;
 225         bsp->shm_atime = lsp->shm_atime;
 226         bsp->shm_dtime = lsp->shm_dtime;
 227         bsp->shm_ctime = lsp->shm_ctime;
 228 }
 229
 230 static void
 231 bsd_to_linux_shmid_ds(struct shmid_ds *bsp, struct l_shmid64_ds *lsp)
 232 {
 233
 234         bsd_to_linux_ipc_perm(&bsp->shm_perm, &lsp->shm_perm);
 235         lsp->shm_segsz = bsp->shm_segsz;
 236         lsp->shm_lpid = bsp->shm_lpid;
 237         lsp->shm_cpid = bsp->shm_cpid;
 238         lsp->shm_nattch = bsp->shm_nattch;
 239         lsp->shm_atime = bsp->shm_atime;
 240         lsp->shm_dtime = bsp->shm_dtime;
 241         lsp->shm_ctime = bsp->shm_ctime;
 242 }
 243
 244 static void
 245 linux_to_bsd_msqid_ds(struct l_msqid64_ds *lsp, struct msqid_ds *bsp)
 246 {
 247
 248         linux_to_bsd_ipc_perm(&lsp->msg_perm, &bsp->msg_perm);
 249         bsp->msg_cbytes = lsp->msg_cbytes;
 250         bsp->msg_qnum = lsp->msg_qnum;
 251         bsp->msg_qbytes = lsp->msg_qbytes;
 252         bsp->msg_lspid = lsp->msg_lspid;
 253         bsp->msg_lrpid = lsp->msg_lrpid;
 254         bsp->msg_stime = lsp->msg_stime;
 255         bsp->msg_rtime = lsp->msg_rtime;
 256         bsp->msg_ctime = lsp->msg_ctime;
 257 }
 258
 259 static void
 260 bsd_to_linux_msqid_ds(struct msqid_ds *bsp, struct l_msqid64_ds *lsp)
 261 {
 262
 263         bsd_to_linux_ipc_perm(&bsp->msg_perm, &lsp->msg_perm);
 264         lsp->msg_cbytes = bsp->msg_cbytes;
 265         lsp->msg_qnum = bsp->msg_qnum;
 266         lsp->msg_qbytes = bsp->msg_qbytes;
 267         lsp->msg_lspid = bsp->msg_lspid;
 268         lsp->msg_lrpid = bsp->msg_lrpid;
 269         lsp->msg_stime = bsp->msg_stime;
 270         lsp->msg_rtime = bsp->msg_rtime;
 271         lsp->msg_ctime = bsp->msg_ctime;
 272 }
 273
 274 static int
 275 linux_ipc64_perm_to_ipc_perm(struct l_ipc64_perm *in, struct l_ipc_perm *out)
 276 {
 277
 278         out->key = in->key;
 279         out->uid = in->uid;
 280         out->gid = in->gid;
 281         out->cuid = in->cuid;
 282         out->cgid = in->cgid;
 283         out->mode = in->mode;
 284         out->seq = in->seq;
 285
 286         /* Linux does not check overflow */
 287         if (out->uid != in->uid || out->gid != in->gid ||
 288             out->cuid != in->cuid || out->cgid != in->cgid ||
 289             out->mode != in->mode)
 290                 return (EOVERFLOW);
 291         else
 292                 return (0);
 293 }
 294
 295 static int
 296 linux_msqid_pullup(l_int ver, struct l_msqid64_ds *linux_msqid64, caddr_t uaddr)
 297 {
 298         struct l_msqid_ds linux_msqid;
 299         int error;
 300
 301         if (ver == LINUX_IPC_64 || SV_CURPROC_FLAG(SV_LP64))
 302                 return (copyin(uaddr, linux_msqid64, sizeof(*linux_msqid64)));
 303
 304         error = copyin(uaddr, &linux_msqid, sizeof(linux_msqid));
 305         if (error != 0)
 306                 return (error);
 307
 308         bzero(linux_msqid64, sizeof(*linux_msqid64));
 309         linux_msqid64->msg_perm.uid = linux_msqid.msg_perm.uid;
 310         linux_msqid64->msg_perm.gid = linux_msqid.msg_perm.gid;
 311         linux_msqid64->msg_perm.mode = linux_msqid.msg_perm.mode;
 312         if (linux_msqid.msg_qbytes == 0)
 313                 linux_msqid64->msg_qbytes = linux_msqid.msg_lqbytes;
 314         else
 315                 linux_msqid64->msg_qbytes = linux_msqid.msg_qbytes;
 316         return (0);
 317 }
 318
 319 static int
 320 linux_msqid_pushdown(l_int ver, struct l_msqid64_ds *linux_msqid64, caddr_t uaddr)
 321 {
 322         struct l_msqid_ds linux_msqid;
 323         int error;
 324
 325         if (ver == LINUX_IPC_64 || SV_CURPROC_FLAG(SV_LP64))
 326                 return (copyout(linux_msqid64, uaddr, sizeof(*linux_msqid64)));
 327
 328         bzero(&linux_msqid, sizeof(linux_msqid));
 329         error = linux_ipc64_perm_to_ipc_perm(&linux_msqid64->msg_perm,
 330             &linux_msqid.msg_perm);
 331         if (error != 0)
 332                 return (error);
 333
 334         linux_msqid.msg_stime = linux_msqid64->msg_stime;
 335         linux_msqid.msg_rtime = linux_msqid64->msg_rtime;
 336         linux_msqid.msg_ctime = linux_msqid64->msg_ctime;
 337
 338         if (linux_msqid64->msg_cbytes > USHRT_MAX)
 339                 linux_msqid.msg_cbytes = USHRT_MAX;
 340         else
 341                 linux_msqid.msg_cbytes = linux_msqid64->msg_cbytes;
 342         linux_msqid.msg_lcbytes = linux_msqid64->msg_cbytes;
 343         if (linux_msqid64->msg_qnum > USHRT_MAX)
 344                 linux_msqid.msg_qnum = USHRT_MAX;
 345         else
 346                 linux_msqid.msg_qnum = linux_msqid64->msg_qnum;
 347         if (linux_msqid64->msg_qbytes > USHRT_MAX)
 348                 linux_msqid.msg_qbytes = USHRT_MAX;
 349         else
 350                 linux_msqid.msg_qbytes = linux_msqid64->msg_qbytes;
 351         linux_msqid.msg_lqbytes = linux_msqid64->msg_qbytes;
 352         linux_msqid.msg_lspid = linux_msqid64->msg_lspid;
 353         linux_msqid.msg_lrpid = linux_msqid64->msg_lrpid;
 354
 355         /* Linux does not check overflow */
 356         if (linux_msqid.msg_stime != linux_msqid64->msg_stime ||
 357             linux_msqid.msg_rtime != linux_msqid64->msg_rtime ||
 358             linux_msqid.msg_ctime != linux_msqid64->msg_ctime)
 359                 return (EOVERFLOW);
 360         return (copyout(&linux_msqid, uaddr, sizeof(linux_msqid)));
 361 }
 362
 363 static int
 364 linux_semid_pullup(l_int ver, struct l_semid64_ds *linux_semid64, caddr_t uaddr)
 365 {
 366         struct l_semid_ds linux_semid;
 367         int error;
 368
 369         if (ver == LINUX_IPC_64 || SV_CURPROC_FLAG(SV_LP64))
 370                 return (copyin(uaddr, linux_semid64, sizeof(*linux_semid64)));
 371         error = copyin(uaddr, &linux_semid, sizeof(linux_semid));
 372         if (error != 0)
 373                 return (error);
 374
 375         bzero(linux_semid64, sizeof(*linux_semid64));
 376         linux_semid64->sem_perm.uid = linux_semid.sem_perm.uid;
 377         linux_semid64->sem_perm.gid = linux_semid.sem_perm.gid;
 378         linux_semid64->sem_perm.mode = linux_semid.sem_perm.mode;
 379         return (0);
 380 }
 381
 382 static int
 383 linux_semid_pushdown(l_int ver, struct l_semid64_ds *linux_semid64, caddr_t uaddr)
 384 {
 385         struct l_semid_ds linux_semid;
 386         int error;
 387
 388         if (ver == LINUX_IPC_64 || SV_CURPROC_FLAG(SV_LP64))
 389                 return (copyout(linux_semid64, uaddr, sizeof(*linux_semid64)));
 390
 391         bzero(&linux_semid, sizeof(linux_semid));
 392                 error = linux_ipc64_perm_to_ipc_perm(&linux_semid64->sem_perm,
 393             &linux_semid.sem_perm);
 394         if (error != 0)
 395                 return (error);
 396
 397         linux_semid.sem_otime = linux_semid64->sem_otime;
 398         linux_semid.sem_ctime = linux_semid64->sem_ctime;
 399         linux_semid.sem_nsems = linux_semid64->sem_nsems;
 400
 401         /* Linux does not check overflow */
 402         if (linux_semid.sem_otime != linux_semid64->sem_otime ||
 403             linux_semid.sem_ctime != linux_semid64->sem_ctime ||
 404             linux_semid.sem_nsems != linux_semid64->sem_nsems)
 405                 return (EOVERFLOW);
 406         return (copyout(&linux_semid, uaddr, sizeof(linux_semid)));
 407 }
 408
 409 static int
 410 linux_shmid_pullup(l_int ver, struct l_shmid64_ds *linux_shmid64, caddr_t uaddr)
 411 {
 412         struct l_shmid_ds linux_shmid;
 413         int error;
 414
 415         if (ver == LINUX_IPC_64 || SV_CURPROC_FLAG(SV_LP64))
 416                 return (copyin(uaddr, linux_shmid64, sizeof(*linux_shmid64)));
 417
 418         error = copyin(uaddr, &linux_shmid, sizeof(linux_shmid));
 419         if (error != 0)
 420                 return (error);
 421
 422         bzero(linux_shmid64, sizeof(*linux_shmid64));
 423         linux_shmid64->shm_perm.uid = linux_shmid.shm_perm.uid;
 424         linux_shmid64->shm_perm.gid = linux_shmid.shm_perm.gid;
 425         linux_shmid64->shm_perm.mode = linux_shmid.shm_perm.mode;
 426         return (0);
 427 }
 428
 429 static int
 430 linux_shmid_pushdown(l_int ver, struct l_shmid64_ds *linux_shmid64, caddr_t uaddr)
 431 {
 432         struct l_shmid_ds linux_shmid;
 433         int error;
 434
 435         if (ver == LINUX_IPC_64 || SV_CURPROC_FLAG(SV_LP64))
 436                 return (copyout(linux_shmid64, uaddr, sizeof(*linux_shmid64)));
 437
 438         bzero(&linux_shmid, sizeof(linux_shmid));
 439         error = linux_ipc64_perm_to_ipc_perm(&linux_shmid64->shm_perm,
 440             &linux_shmid.shm_perm);
 441         if (error != 0)
 442                 return (error);
 443
 444         linux_shmid.shm_segsz = linux_shmid64->shm_segsz;
 445         linux_shmid.shm_atime = linux_shmid64->shm_atime;
 446         linux_shmid.shm_dtime = linux_shmid64->shm_dtime;
 447         linux_shmid.shm_ctime = linux_shmid64->shm_ctime;
 448         linux_shmid.shm_cpid = linux_shmid64->shm_cpid;
 449         linux_shmid.shm_lpid = linux_shmid64->shm_lpid;
 450         linux_shmid.shm_nattch = linux_shmid64->shm_nattch;
 451
 452         /* Linux does not check overflow */
 453         if (linux_shmid.shm_segsz != linux_shmid64->shm_segsz ||
 454             linux_shmid.shm_atime != linux_shmid64->shm_atime ||
 455             linux_shmid.shm_dtime != linux_shmid64->shm_dtime ||
 456             linux_shmid.shm_ctime != linux_shmid64->shm_ctime ||
 457             linux_shmid.shm_cpid != linux_shmid64->shm_cpid ||
 458             linux_shmid.shm_lpid != linux_shmid64->shm_lpid ||
 459             linux_shmid.shm_nattch != linux_shmid64->shm_nattch)
 460                 return (EOVERFLOW);
 461         return (copyout(&linux_shmid, uaddr, sizeof(linux_shmid)));
 462 }
 463
 464 static int
 465 linux_shminfo_pushdown(l_int ver, struct l_shminfo64 *linux_shminfo64,
 466     caddr_t uaddr)
 467 {
 468         struct l_shminfo linux_shminfo;
 469
 470         if (ver == LINUX_IPC_64 || SV_CURPROC_FLAG(SV_LP64))
 471                 return (copyout(linux_shminfo64, uaddr,
 472                     sizeof(*linux_shminfo64)));
 473
 474         bzero(&linux_shminfo, sizeof(linux_shminfo));
 475         linux_shminfo.shmmax = linux_shminfo64->shmmax;
 476         linux_shminfo.shmmin = linux_shminfo64->shmmin;
 477         linux_shminfo.shmmni = linux_shminfo64->shmmni;
 478         linux_shminfo.shmseg = linux_shminfo64->shmseg;
 479         linux_shminfo.shmall = linux_shminfo64->shmall;
 480         return (copyout(&linux_shminfo, uaddr, sizeof(linux_shminfo)));
 481 }
 482
 483 #if defined(__i386__) || (defined(__amd64__) && defined(COMPAT_LINUX32))
 484 int
 485 linux_semtimedop_time64(struct thread *td, struct linux_semtimedop_time64_args *args)
 486 {
 487         struct timespec ts, *tsa;
 488         int error;
 489
 490         if (args->timeout) {
 491                 error = linux_get_timespec64(&ts, args->timeout);
 492                 if (error != 0)
 493                         return (error);
 494                 tsa = &ts;
 495         } else
 496                 tsa = NULL;
 497
 498         return (kern_semop(td, args->semid, PTRIN(args->tsops),
 499             args->nsops, tsa));
 500 }
 501 #endif /* __i386__) || (__amd64__ && COMPAT_LINUX32) */
 502
 503 int
 504 linux_semtimedop(struct thread *td, struct linux_semtimedop_args *args)
 505 {
 506         struct timespec ts, *tsa;
 507         int error;
 508
 509         if (args->timeout) {
 510                 error = linux_get_timespec(&ts, args->timeout);
 511                 if (error != 0)
 512                         return (error);
 513                 tsa = &ts;
 514         } else
 515                 tsa = NULL;
 516
 517         return (kern_semop(td, args->semid, PTRIN(args->tsops),
 518             args->nsops, tsa));
 519 }
 520
 521 int
 522 linux_semget(struct thread *td, struct linux_semget_args *args)
 523 {
 524         struct semget_args bsd_args = {
 525                 .key = args->key,
 526                 .nsems = args->nsems,
 527                 .semflg = args->semflg
 528         };
 529
 530         if (args->nsems < 0)
 531                 return (EINVAL);
 532         return (sys_semget(td, &bsd_args));
 533 }
 534
 535 int
 536 linux_semctl(struct thread *td, struct linux_semctl_args *args)
 537 {
 538         struct l_semid64_ds linux_semid64;
 539         struct l_seminfo linux_seminfo;
 540         struct semid_ds semid;
 541         union semun semun;
 542         register_t rval;
 543         int cmd, error;
 544
 545         memset(&linux_seminfo, 0, sizeof(linux_seminfo));
 546         memset(&linux_semid64, 0, sizeof(linux_semid64));
 547
 548         switch (args->cmd & ~LINUX_IPC_64) {
 549         case LINUX_IPC_RMID:
 550                 cmd = IPC_RMID;
 551                 break;
 552         case LINUX_GETNCNT:
 553                 cmd = GETNCNT;
 554                 break;
 555         case LINUX_GETPID:
 556                 cmd = GETPID;
 557                 break;
 558         case LINUX_GETVAL:
 559                 cmd = GETVAL;
 560                 break;
 561         case LINUX_GETZCNT:
 562                 cmd = GETZCNT;
 563                 break;
 564         case LINUX_SETVAL:
 565                 cmd = SETVAL;
 566                 semun.val = args->arg.val;
 567                 break;
 568         case LINUX_IPC_SET:
 569                 cmd = IPC_SET;
 570                 error = linux_semid_pullup(args->cmd & LINUX_IPC_64,
 571                     &linux_semid64, PTRIN(args->arg.buf));
 572                 if (error != 0)
 573                         return (error);
 574                 linux_to_bsd_semid_ds(&linux_semid64, &semid);
 575                 semun.buf = &semid;
 576                 return (kern_semctl(td, args->semid, args->semnum, cmd, &semun,
 577                     td->td_retval));
 578         case LINUX_IPC_STAT:
 579                 cmd = IPC_STAT;
 580                 semun.buf = &semid;
 581                 error = kern_semctl(td, args->semid, args->semnum, cmd, &semun,
 582                     &rval);
 583                 if (error != 0)
 584                         return (error);
 585                 bsd_to_linux_semid_ds(&semid, &linux_semid64);
 586                 return (linux_semid_pushdown(args->cmd & LINUX_IPC_64,
 587                     &linux_semid64, PTRIN(args->arg.buf)));
 588         case LINUX_SEM_STAT:
 589                 cmd = SEM_STAT;
 590                 semun.buf = &semid;
 591                 error = kern_semctl(td, args->semid, args->semnum, cmd, &semun,
 592                     &rval);
 593                 if (error != 0)
 594                         return (error);
 595                 bsd_to_linux_semid_ds(&semid, &linux_semid64);
 596                 error = linux_semid_pushdown(args->cmd & LINUX_IPC_64,
 597                     &linux_semid64, PTRIN(args->arg.buf));
 598                 if (error == 0)
 599                         td->td_retval[0] = rval;
 600                 return (error);
 601         case LINUX_IPC_INFO:
 602         case LINUX_SEM_INFO:
 603                 bcopy(&seminfo, &linux_seminfo.semmni, sizeof(linux_seminfo) -
 604                     sizeof(linux_seminfo.semmap) );
 605                 /*
 606                  * Linux does not use the semmap field but populates it with
 607                  * the defined value from SEMMAP, which really is redefined to
 608                  * SEMMNS, which they define as SEMMNI * SEMMSL.  Try to
 609                  * simulate this returning our dynamic semmns value.
 610                  */
 611                 linux_seminfo.semmap = linux_seminfo.semmns;
 612 /* XXX BSD equivalent?
 613 #define used_semids 10
 614 #define used_sems 10
 615                 linux_seminfo.semusz = used_semids;
 616                 linux_seminfo.semaem = used_sems;
 617 */
 618                 error = copyout(&linux_seminfo,
 619                     PTRIN(args->arg.buf), sizeof(linux_seminfo));
 620                 if (error != 0)
 621                         return (error);
 622                 /*
 623                  * TODO: Linux return the last assigned id, not the semmni.
 624                  */
 625                 td->td_retval[0] = seminfo.semmni;
 626                 return (0);
 627         case LINUX_GETALL:
 628                 cmd = GETALL;
 629                 semun.array = PTRIN(args->arg.array);
 630                 break;
 631         case LINUX_SETALL:
 632                 cmd = SETALL;
 633                 semun.array = PTRIN(args->arg.array);
 634                 break;
 635         default:
 636                 linux_msg(td, "ipc type %d is not implemented",
 637                   args->cmd & ~LINUX_IPC_64);
 638                 return (EINVAL);
 639         }
 640         return (kern_semctl(td, args->semid, args->semnum, cmd, &semun,
 641             td->td_retval));
 642 }
 643
 644 int
 645 linux_msgsnd(struct thread *td, struct linux_msgsnd_args *args)
 646 {
 647         const void *msgp;
 648         long mtype;
 649         l_long lmtype;
 650         int error;
 651
 652         if ((l_long)args->msgsz < 0 || args->msgsz > (l_long)msginfo.msgmax)
 653                 return (EINVAL);
 654         msgp = PTRIN(args->msgp);
 655         if ((error = copyin(msgp, &lmtype, sizeof(lmtype))) != 0)
 656                 return (error);
 657         mtype = (long)lmtype;
 658         return (kern_msgsnd(td, args->msqid,
 659             (const char *)msgp + sizeof(lmtype),
 660             args->msgsz, args->msgflg, mtype));
 661 }
 662
 663 int
 664 linux_msgrcv(struct thread *td, struct linux_msgrcv_args *args)
 665 {
 666         void *msgp;
 667         long mtype;
 668         l_long lmtype;
 669         int error;
 670
 671         if ((l_long)args->msgsz < 0 || args->msgsz > (l_long)msginfo.msgmax)
 672                 return (EINVAL);
 673         msgp = PTRIN(args->msgp);
 674         if ((error = kern_msgrcv(td, args->msqid,
 675             (char *)msgp + sizeof(lmtype), args->msgsz,
 676             args->msgtyp, args->msgflg, &mtype)) != 0)
 677                 return (error);
 678         lmtype = (l_long)mtype;
 679         return (copyout(&lmtype, msgp, sizeof(lmtype)));
 680 }
 681
 682 int
 683 linux_msgget(struct thread *td, struct linux_msgget_args *args)
 684 {
 685         struct msgget_args bsd_args = {
 686                 .key = args->key,
 687                 .msgflg = args->msgflg
 688         };
 689
 690         return (sys_msgget(td, &bsd_args));
 691 }
 692
 693 int
 694 linux_msgctl(struct thread *td, struct linux_msgctl_args *args)
 695 {
 696         int error, bsd_cmd;
 697         struct l_msqid64_ds linux_msqid64;
 698         struct msqid_ds bsd_msqid;
 699
 700         memset(&linux_msqid64, 0, sizeof(linux_msqid64));
 701
 702         bsd_cmd = args->cmd & ~LINUX_IPC_64;
 703         switch (bsd_cmd) {
 704         case LINUX_IPC_INFO:
 705         case LINUX_MSG_INFO: {
 706                 struct l_msginfo linux_msginfo;
 707
 708                 memset(&linux_msginfo, 0, sizeof(linux_msginfo));
 709                 /*
 710                  * XXX MSG_INFO uses the same data structure but returns different
 711                  * dynamic counters in msgpool, msgmap, and msgtql fields.
 712                  */
 713                 linux_msginfo.msgpool = (long)msginfo.msgmni *
 714                     (long)msginfo.msgmnb / 1024L;       /* XXX MSG_INFO. */
 715                 linux_msginfo.msgmap = msginfo.msgmnb;  /* XXX MSG_INFO. */
 716                 linux_msginfo.msgmax = msginfo.msgmax;
 717                 linux_msginfo.msgmnb = msginfo.msgmnb;
 718                 linux_msginfo.msgmni = msginfo.msgmni;
 719                 linux_msginfo.msgssz = msginfo.msgssz;
 720                 linux_msginfo.msgtql = msginfo.msgtql;  /* XXX MSG_INFO. */
 721                 linux_msginfo.msgseg = msginfo.msgseg;
 722                 error = copyout(&linux_msginfo, PTRIN(args->buf),
 723                     sizeof(linux_msginfo));
 724                 if (error == 0)
 725                     td->td_retval[0] = msginfo.msgmni;  /* XXX */
 726
 727                 return (error);
 728         }
 729
 730         /*
 731          * TODO: implement this
 732          * case LINUX_MSG_STAT:
 733          */
 734         case LINUX_IPC_STAT:
 735                 /* NOTHING */
 736                 break;
 737
 738         case LINUX_IPC_SET:
 739                 error = linux_msqid_pullup(args->cmd & LINUX_IPC_64,
 740                     &linux_msqid64, PTRIN(args->buf));
 741                 if (error != 0)
 742                         return (error);
 743                 linux_to_bsd_msqid_ds(&linux_msqid64, &bsd_msqid);
 744                 break;
 745
 746         case LINUX_IPC_RMID:
 747                 /* NOTHING */
 748                 break;
 749
 750         default:
 751                 return (EINVAL);
 752                 break;
 753         }
 754
 755         error = kern_msgctl(td, args->msqid, bsd_cmd, &bsd_msqid);
 756         if (error != 0) {
 757                 if (bsd_cmd == LINUX_IPC_RMID && error == EACCES)
 758                         return (EPERM);
 759                 if (bsd_cmd != LINUX_IPC_RMID || error != EINVAL)
 760                         return (error);
 761         }
 762
 763         if (bsd_cmd == LINUX_IPC_STAT) {
 764                 bsd_to_linux_msqid_ds(&bsd_msqid, &linux_msqid64);
 765                 return (linux_msqid_pushdown(args->cmd & LINUX_IPC_64,
 766                     &linux_msqid64, PTRIN(args->buf)));
 767         }
 768
 769         return (0);
 770 }
 771
 772 int
 773 linux_shmat(struct thread *td, struct linux_shmat_args *args)
 774 {
 775         struct shmat_args bsd_args = {
 776                 .shmid = args->shmid,
 777                 .shmaddr = PTRIN(args->shmaddr),
 778                 .shmflg = args->shmflg
 779         };
 780
 781         return (sys_shmat(td, &bsd_args));
 782 }
 783
 784 int
 785 linux_shmdt(struct thread *td, struct linux_shmdt_args *args)
 786 {
 787         struct shmdt_args bsd_args = {
 788                 .shmaddr = PTRIN(args->shmaddr)
 789         };
 790
 791         return (sys_shmdt(td, &bsd_args));
 792 }
 793
 794 int
 795 linux_shmget(struct thread *td, struct linux_shmget_args *args)
 796 {
 797         struct shmget_args bsd_args = {
 798                 .key = args->key,
 799                 .size = args->size,
 800                 .shmflg = args->shmflg
 801         };
 802
 803         return (sys_shmget(td, &bsd_args));
 804 }
 805
 806 int
 807 linux_shmctl(struct thread *td, struct linux_shmctl_args *args)
 808 {
 809         struct l_shmid64_ds linux_shmid64;
 810         struct l_shminfo64 linux_shminfo64;
 811         struct l_shm_info linux_shm_info;
 812         struct shmid_ds bsd_shmid;
 813         int error;
 814
 815         memset(&linux_shm_info, 0, sizeof(linux_shm_info));
 816         memset(&linux_shmid64, 0, sizeof(linux_shmid64));
 817         memset(&linux_shminfo64, 0, sizeof(linux_shminfo64));
 818
 819         switch (args->cmd & ~LINUX_IPC_64) {
 820         case LINUX_IPC_INFO: {
 821                 struct shminfo bsd_shminfo;
 822
 823                 /* Perform shmctl wanting removed segments lookup */
 824                 error = kern_shmctl(td, args->shmid, IPC_INFO,
 825                     (void *)&bsd_shminfo, NULL);
 826                 if (error != 0)
 827                         return (error);
 828
 829                 bsd_to_linux_shminfo(&bsd_shminfo, &linux_shminfo64);
 830
 831                 return (linux_shminfo_pushdown(args->cmd & LINUX_IPC_64,
 832                     &linux_shminfo64, PTRIN(args->buf)));
 833         }
 834
 835         case LINUX_SHM_INFO: {
 836                 struct shm_info bsd_shm_info;
 837
 838                 /* Perform shmctl wanting removed segments lookup */
 839                 error = kern_shmctl(td, args->shmid, SHM_INFO,
 840                     (void *)&bsd_shm_info, NULL);
 841                 if (error != 0)
 842                         return (error);
 843
 844                 bsd_to_linux_shm_info(&bsd_shm_info, &linux_shm_info);
 845
 846                 return (copyout(&linux_shm_info, PTRIN(args->buf),
 847                     sizeof(struct l_shm_info)));
 848         }
 849
 850         case LINUX_IPC_STAT:
 851                 /* Perform shmctl wanting removed segments lookup */
 852                 error = kern_shmctl(td, args->shmid, IPC_STAT,
 853                     (void *)&bsd_shmid, NULL);
 854                 if (error != 0)
 855                         return (error);
 856
 857                 bsd_to_linux_shmid_ds(&bsd_shmid, &linux_shmid64);
 858
 859                 return (linux_shmid_pushdown(args->cmd & LINUX_IPC_64,
 860                     &linux_shmid64, PTRIN(args->buf)));
 861
 862         case LINUX_SHM_STAT:
 863                 /* Perform shmctl wanting removed segments lookup */
 864                 error = kern_shmctl(td, args->shmid, IPC_STAT,
 865                     (void *)&bsd_shmid, NULL);
 866                 if (error != 0)
 867                         return (error);
 868
 869                 bsd_to_linux_shmid_ds(&bsd_shmid, &linux_shmid64);
 870
 871                 return (linux_shmid_pushdown(args->cmd & LINUX_IPC_64,
 872                     &linux_shmid64, PTRIN(args->buf)));
 873
 874         case LINUX_IPC_SET:
 875                 error = linux_shmid_pullup(args->cmd & LINUX_IPC_64,
 876                     &linux_shmid64, PTRIN(args->buf));
 877                 if (error != 0)
 878                         return (error);
 879
 880                 linux_to_bsd_shmid_ds(&linux_shmid64, &bsd_shmid);
 881
 882                 /* Perform shmctl wanting removed segments lookup */
 883                 return (kern_shmctl(td, args->shmid, IPC_SET,
 884                     (void *)&bsd_shmid, NULL));
 885
 886         case LINUX_IPC_RMID: {
 887                 void *buf;
 888
 889                 if (args->buf == 0)
 890                         buf = NULL;
 891                 else {
 892                         error = linux_shmid_pullup(args->cmd & LINUX_IPC_64,
 893                             &linux_shmid64, PTRIN(args->buf));
 894                         if (error != 0)
 895                                 return (error);
 896                         linux_to_bsd_shmid_ds(&linux_shmid64, &bsd_shmid);
 897                         buf = (void *)&bsd_shmid;
 898                 }
 899                 return (kern_shmctl(td, args->shmid, IPC_RMID, buf, NULL));
 900         }
 901
 902         case LINUX_SHM_LOCK:
 903                 /* FALLTHROUGH */
 904         case LINUX_SHM_UNLOCK:
 905                 /* FALLTHROUGH */
 906         default:
 907                 linux_msg(td, "ipc type %d not implemented",
 908                     args->cmd & ~LINUX_IPC_64);
 909                 return (EINVAL);
 910         }
 911 }
 912
 913 MODULE_DEPEND(linux, sysvmsg, 1, 1, 1);
 914 MODULE_DEPEND(linux, sysvsem, 1, 1, 1);
 915 MODULE_DEPEND(linux, sysvshm, 1, 1, 1);